JPH1096556A - Combustion equipment - Google Patents

Abstract

(57) [Problem] To provide a combustion apparatus capable of preventing hot water from flowing out at the start of hot water supply due to post-boiling of a hot water supply heat exchanger. A hot water supply standby control means is provided in a control device (20). The control means target YuAtsushi hot water supply heat exchanger 1 for tapping temperature in the closed state of V ₂ valve 10 is equal to the hot water supplying set temperature T
Calculating a _2Cal, compared to after the hot water supply burner combustion stops the measured water temperature T ₂ of the target YuAtsushi T _2Cal and hot-water supply heat exchanger hot water temperature sensor 14, exceeds a preset range T ₂ is predetermined from the T _2Cal when it is determined that the high Te to open the V ₂ valve 10 by outputting an open signal to the V ₂ valve 10. Moreover, tapping temperature of the hot water supply heat exchanger 1 to the total water inlet flow rate Q ₀ of the hot water set temperature flow Q
Detecting a flow rate ratio of _HE, when you are outputting an open signal to the V ₂ valve 10 controls the opening amount of V ₁ valve 7 which is a flow rate control valve so that the detected flow rate ratio to the next tapping Prepare.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a combustion apparatus provided with a hot water supply heat exchanger that heats water guided from a water supply passage by hot water supply burner combustion and flows out to the hot water supply passage.

[0002]

2. Description of the Related Art As is well known, a typical water heater as a combustion device is provided with a hot water supply heat exchanger and a hot water supply burner, and a water supply passage is provided on the inlet side of the hot water supply heat exchanger and the hot water supply is provided on the outlet side. The passages are connected to each other, and the hot water supply passage is led to a hot water tap in a kitchen or the like. When the hot water tap is opened, the hot water supply heat exchanger heats the water guided from the water supply source through the water supply passage using the heat of the hot water supply combustion of the hot water supply burner, and passes the heated hot water through the hot water supply passage. Hot water is supplied through a hot water tap.

By the way, when a large amount of water is poured into a hot water supply heat exchanger in order to supply a large amount of hot water, the hot water supply heat exchanger cannot sufficiently heat the large amount of flowing water due to insufficient capacity or the like. The temperature of the flowing water of the hot water supply heat exchanger decreases, the surface temperature of the water pipe of the hot water supply heat exchanger decreases, and a dew condensation phenomenon may occur in which steam generated by the combustion of the hot water supply burner adheres to the surface of the water pipe of the hot water supply heat exchanger. If this condensation phenomenon occurs frequently, there is a problem that adverse effects such as deterioration of the water pipe of the hot water supply heat exchanger occur.

Therefore, in order to avoid the above-mentioned problem, a bypass passage which short-circuits the inlet and outlet of the hot water supply heat exchanger is provided.
The water guided from the water supply source via the water supply passage is diverted to the hot water supply heat exchanger side and the bypass passage side, reducing the flow rate of the hot water supply heat exchanger and preventing the water pipe surface temperature of the hot water supply heat exchanger from dropping. In addition, a hot water supply device configured to prevent dew condensation in the hot water supply heat exchanger has been proposed.

[0005]

As is well known, hot water retained in the hot water supply heat exchanger after the hot water tap is closed, that is, after hot water supply is stopped (after hot water is stopped), is shown by a solid curve A in FIG. As described above, immediately after the hot water supply is stopped, the hot water is higher than the hot water temperature of the hot water supply heat exchanger before the hot water shuts off due to the after-boil (a phenomenon in which the retained heat of the hot water supply heat exchanger is transmitted to the stagnant hot water of the hot water supply heat exchanger and the stagnant hot water temperature rises). It becomes hot water (overshoot). When the hot water of this overshoot flows out of the hot water supply heat exchanger when the hot water tap is opened, the hot water higher than the hot water supply set temperature set by the user of the hot water may cause discomfort to the user of the hot water supply. Occurs.

Therefore, in order to solve the above problem, a large number of the bypass passages are provided, and an opening / closing valve such as an electromagnetic valve for opening / closing the passage is provided in the bypass passages, and the opening / closing control of the opening / closing valves is performed. The flow ratio of the hot water supply heat exchanger to the total incoming water flow rate, that is, the mixing ratio of the amount of hot water flowing out of the hot water supply heat exchanger and the amount of water flowing out of the bypass passage, is variably controlled so that the temperature of the hot water at the time of tapping becomes the set hot water supply temperature. It is conceivable to adopt a configuration in which

When the hot water supply system having the above configuration is adopted, in order to stably supply hot water at the set hot water supply temperature,
A large number of bypass passages and their on-off valves are provided, and these on-off valves are individually opened and closed to control the flow ratio of the hot water supply heat exchanger to the total incoming water flow rate so that the hot water temperature at the time of hot water reaches the hot water set temperature. Conceivable. In order to do this, as described above, a large number of bypass passages and their on-off valves must be provided, which complicates the pipe configuration, increases the cost, and increases the price of the water heater. Would. In addition, since a large number of bypass passages are provided, the pipe resistance increases, the amount of flowing water decreases, and a problem arises in that a large amount of hot water cannot be supplied.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and an object of the present invention is to prevent high-temperature hot tapping at the time of tapping with a simple pipe configuration, and to supply a large amount of hot tap water.
It is to provide an inexpensive combustion device.

[0009]

Means for Solving the Problems In order to achieve the above object, the present invention has the following structure to solve the above problems.

That is, the first aspect of the present invention provides a hot water supply heat exchanger that heats water guided from a water supply passage using heat of combustion of a hot water supply burner and flows out to the hot water supply passage, and an inlet and outlet of the hot water supply heat exchanger. A bypass passage that short-circuits the bypass passage, a bypass passage opening / closing valve that opens and closes the bypass passage, and a flow control valve that is provided in the hot water supply passage on the upstream side of the bypass passage outlet connection portion and that controls a flow rate by a valve opening amount. Combustion equipment having an incoming water temperature sensor for detecting the temperature of water in the water supply passage, a hot water supply heat exchanger hot water temperature sensor for detecting hot water temperature of the hot water supply heat exchanger, and hot water supply temperature setting means for setting hot water supply temperature After the hot water supply combustion of the hot water supply burner is stopped, the hot water temperature at the next hot water supply is determined based on the flow rate ratio of the predetermined hot water supply heat exchanger to the total incoming water flow rate, the detected incoming water temperature, and the hot water supply set temperature. Set temperature A hot water supply heat exchanger target hot water temperature detection unit for obtaining a target hot water temperature of the heat exchanger; comparing the target hot water temperature with the measured hot water temperature of the hot water supply heat exchanger hot water sensor, When it is determined that the temperature is higher than a predetermined set range than the hot water temperature, an opening signal to the bypass passage opening / closing valve is output, and otherwise, a closing signal to the bypass passage opening / closing valve is output, and the opening / closing operation of the bypass passage opening / closing valve is performed. A determination unit; based on the measured hot water temperature of the hot water supply heat exchanger and the input water temperature detected by the input water temperature sensor and the set hot water supply temperature, determine the flow ratio of the hot water supply heat exchanger to the total input water flow for the hot water supply temperature to reach the hot water supply set temperature. When the opening signal to the bypass passage opening / closing valve is output from the bypass passage opening / closing valve opening / closing operation determination section, the opening amount of the flow control valve is controlled so as to become the above detected flow ratio, and the next tapping is prepared. Flow control valve opening amount A control unit; with a configuration in which a is a means to solve the problem.

According to a second aspect of the present invention, there is provided a hot water supply heat exchanger that heats water guided from a water supply passage by utilizing heat of combustion of a hot water supply burner and flows out to the hot water supply passage. A bypass passage to be short-circuited; a bypass passage opening / closing valve for opening / closing the bypass passage; a flow control valve provided in the hot water supply passage upstream of the bypass passage outlet connection portion to control a flow rate by a valve opening amount; In a combustion device having a hot water temperature sensor for detecting the temperature of hot water and hot water temperature setting means for setting the hot water temperature, a predetermined hot water supply heat with respect to the total incoming water flow rate after the hot water supply combustion of the hot water burner is stopped. Hot water supply heat exchanger target hot water temperature detection to find the target hot water temperature of the hot water heat exchanger at which the next hot water temperature becomes the hot water set temperature based on the flow rate ratio of the exchanger, the detected incoming water temperature, and the hot water set temperature Part of the hot water burner A data storage unit for storing the temperature data of the staying hot water in the hot water supply heat exchanger that changes with time of the temperature of the hot water in the hot water supply heat exchanger after the stop of hot water combustion; Time measuring means for measuring an elapsed time of the hot water supply; and a hot water supply heat exchanger estimated hot water for estimating and detecting a hot water temperature of the hot water supply heat exchanger based on the staying hot water temperature characteristic data of the hot water supply heat exchanger according to the time measured by the time measuring means. A temperature detector; comparing a detected target hot water temperature of the hot water supply heat exchanger target hot water temperature detector with an estimated hot water temperature of the hot water supply heat exchanger estimated hot water temperature detector, and the estimated hot water temperature is given in advance from the target hot water temperature. A bypass passage opening / closing valve opening / closing operation judging section for outputting an opening signal to the bypass passage opening / closing valve when it is determined to be higher than the set range, and outputting a closing signal to the bypass passage opening / closing valve otherwise; Heat exchanger estimation The flow ratio of the hot water supply heat exchanger to the total incoming water flow for the outlet water temperature to reach the hot water supply set temperature is determined based on the temperature and the incoming water temperature sensor's detection of the incoming water temperature and the set hot water supply temperature. When an open signal to the bypass passage opening / closing valve is being output, a flow control valve opening amount control unit for controlling the opening amount of the flow control valve so as to achieve the detected flow ratio and preparing for the next hot water supply. The configuration provided as a means for solving the above problem.

According to a third aspect of the present invention, there is provided a hot water supply heat exchanger which heats water guided from a water supply passage by utilizing heat of combustion of a hot water supply burner and flows out to the hot water supply passage. A bypass passage to be short-circuited; a bypass passage opening / closing valve for opening / closing the bypass passage; a flow control valve provided in the hot water supply passage upstream of the bypass passage outlet connection portion to control a flow rate by a valve opening amount; In the combustion apparatus having a hot water temperature sensor for detecting the temperature of hot water, a hot water supply heat exchanger hot water temperature sensor for detecting the temperature of hot water in the hot water supply heat exchanger, and hot water supply temperature setting means for setting the hot water supply temperature, After the hot water supply of the hot water supply burner is stopped, the hot water temperature at the next hot water discharge is determined based on the predetermined flow ratio of the hot water supply heat exchanger to the total incoming water flow rate, the detected hot water temperature, and the hot water set temperature. Hot water supply heat exchanger A hot water supply heat exchanger target hot water temperature detection unit for obtaining a target hot water temperature; comparing the target hot water temperature with an actually measured hot water temperature of a hot water supply heat exchanger hot water sensor; A bypass passage opening / closing valve opening / closing operation judging unit that outputs an opening signal to the bypass passage opening / closing valve when it is determined to be higher than the given set range, and outputs a closing signal to the bypass passage opening / closing valve otherwise; A data storage unit for storing the temperature data of the accumulated hot water in the hot water supply heat exchanger that changes with time of the temperature of the hot water in the hot water supply heat exchanger after the stop of the hot water supply combustion of the hot water supply burner; Time measuring means for measuring an elapsed time from a stop; and hot water heat exchange for estimating and detecting the hot water temperature of the hot water heat exchanger based on the staying hot water temperature characteristic data of the hot water heat exchanger according to the time measured by the time measuring means. Device estimation A temperature detection unit; a flow rate ratio of the hot water supply heat exchanger to a total incoming water flow rate for the outlet hot water temperature to become the hot water supply set temperature based on the estimated hot water temperature of the hot water supply heat exchanger and the detected input water temperature and the hot water supply set temperature. ,
When an opening signal to the bypass passage opening / closing valve is outputted from the bypass passage opening / closing valve opening / closing operation determination section, the opening amount of the flow control valve is controlled so as to have the above detected flow ratio, and the flow control for the next hot water supply And a valve-opening-amount control unit.

A fourth aspect of the present invention is a hot water supply heat exchanger that heats water guided from a water supply passage by utilizing heat of combustion of a hot water supply burner and flows out to the hot water supply passage, and includes an inlet and an outlet of the hot water supply heat exchanger. A bypass passage to be short-circuited; a bypass passage opening / closing valve for opening / closing the bypass passage; a flow control valve provided in the hot water supply passage upstream of the bypass passage outlet connection portion to control a flow rate by a valve opening amount; In the combustion apparatus having a hot water temperature sensor for detecting the temperature of hot water, a hot water supply heat exchanger hot water temperature sensor for detecting the temperature of hot water in the hot water supply heat exchanger, and hot water supply temperature setting means for setting the hot water supply temperature, After the hot water supply of the hot water supply burner is stopped, the hot water temperature at the next hot water discharge is determined based on the predetermined flow ratio of the hot water supply heat exchanger to the total incoming water flow rate, the detected hot water temperature, and the hot water set temperature. Hot water supply heat exchanger A hot-water supply heat exchanger target hot-water temperature detection unit for obtaining a target hot-water temperature; and storing hot-water temperature characteristic data of the hot-water supply heat exchanger that changes with time of the hot-water temperature of the hot-water supply heat exchanger after the hot-water supply burner stops hot-water supply combustion. A data storage unit;
Time measuring means for measuring an elapsed time from the time of stopping the hot water supply combustion of the hot water supply burner; and hot water supply heat exchange based on the staying hot water temperature characteristic data according to the measurement time of the time measuring means. A hot water supply heat exchanger estimated hot water temperature detecting section for estimating and detecting the hot water temperature of the hot water supply; a detected target hot water temperature of the hot water supply heat exchanger target hot water temperature detecting section and an estimated hot water temperature of the hot water supply heat exchanger estimated hot water temperature detecting section. By comparison, when it is determined that the estimated hot water temperature is higher than the target hot water temperature beyond a predetermined range, an open signal to the bypass passage opening / closing valve is output, and otherwise, a closing signal to the bypass passage opening / closing valve is output. A bypass passage opening / closing valve opening / closing operation judging unit for outputting a temperature of the hot water and a total incoming flow rate for the outlet hot water temperature to become the hot water setting temperature based on the measured hot water temperature and the hot water temperature detected by the hot water temperature sensor. Of hot water supply heat exchanger When the open signal to the bypass passage opening / closing valve is output from the bypass passage opening / closing valve determination section, the valve opening amount of the flow control valve is controlled so as to become the detected flow ratio. And a flow rate control valve opening amount control unit provided for hot water supply.

According to a fifth aspect of the present invention, the first, third or fourth aspect of the invention is provided.
In addition to the configuration of the invention, a plurality of hot water supply heat exchanger hot water temperature sensors are provided at different locations on the hot water supply heat exchanger side, and the sum of the detected hot water temperatures of the plurality of hot water supply heat exchanger hot water temperature sensors is calculated. Asked,
The means for solving the above-described problem is provided by providing a hot water supply heat exchanger hot water temperature calculation unit that uses the integrated value obtained by multiplying the calculated value by a predetermined coefficient as the measured hot water temperature of the hot water supply heat exchanger.

[0015] The sixth invention is directed to the first, third, or fourth aspect.
In addition to the configuration of the invention, a plurality of hot water supply heat exchanger hot water temperature sensors are provided at different locations on the hot water supply heat exchanger side, and the detected hot water temperatures of the plurality of hot water supply heat exchanger hot water sensors are respectively set in advance. The above-mentioned problem is solved by a configuration in which a hot water supply heat exchanger hot water temperature calculating unit is provided which multiplies the determined coefficient by a predetermined coefficient and uses the sum of the calculated values as the measured hot water temperature of the hot water supply heat exchanger.

According to a seventh aspect of the present invention, there is provided a hot water supply heat exchanger comprising the hot water supply heat exchanger according to any one of the first to sixth aspects, wherein the downstream side of the bypass passage connecting portion is provided. The above-mentioned problem is solved by a configuration in which a fixed bypass passage having no on-off valve for short-circuiting the upstream side of the flow control valve interposition position is provided.

According to an eighth aspect of the present invention, there is provided a hot water supply heat exchanger which heats water guided from a water supply passage by utilizing heat of combustion of a hot water supply burner and flows out to the hot water supply passage. A bypass passage to be short-circuited; a bypass passage opening / closing valve for opening / closing the bypass passage; a flow control valve provided in the hot water supply passage upstream of the bypass passage outlet connection portion to control a flow rate by a valve opening amount; In a combustion apparatus having an incoming water temperature sensor for detecting the temperature of water and a hot water supply temperature setting means for setting the hot water supply temperature, the downstream side of the bypass passage connection portion in the water supply passage of the hot water supply heat exchanger, A hot water supply heat exchanger hot water temperature information detecting means for providing a hot water supply heat exchanger with a fixed bypass passage for short-circuiting the hot water supply passage of the hot water supply passage with the upstream side of the flow control valve interposition position; Bowl hot water A flow ratio calculating unit for calculating a flow ratio of the hot water supply heat exchanger to a total flow rate of hot water for discharging hot water higher than the hot water supply set temperature by a predetermined temperature based on the hot water supply temperature and the detected hot water supply temperature; The flow rate of the hot water supply heat exchanger to the total flow rate of the flow rate of the exchanger and the flow rate of the fixed bypass passage is given in advance as a reference flow rate ratio, and this reference flow rate ratio is compared with the flow rate ratio calculated by the flow rate ratio calculation unit. When it is determined that the calculated flow ratio is lower than the reference flow ratio after the stop of hot water supply combustion, an open signal to the bypass passage on-off valve is output, and otherwise, a close signal to the bypass passage on-off valve is output. An opening / closing valve opening / closing operation determining unit; and a hot water supply heat exchanger for a total incoming flow rate so that the outgoing hot water temperature becomes the hot water supply set temperature based on the hot water temperature information of the hot water supply heat exchanger and the detected incoming water temperature and the hot water supply set temperature. A flow control valve for determining a flow ratio and controlling an opening amount of the flow control valve so that the detected flow ratio is obtained when an opening signal to the bypass passage opening / closing valve is output from the bypass passage opening / closing valve opening / closing operation determination section. And a valve-opening-amount control unit.

In the invention having the above structure, for example, after the hot water supply combustion of the hot water supply burner is stopped, the opening / closing operation determination unit of the bypass passage opening / closing valve determines whether or not the hot water is supplied at the next tapping with the bypass passage opening / closing valve closed. When it is determined that the temperature becomes higher than the hot water supply set temperature beyond a predetermined set range, an open signal to the bypass passage opening / closing valve is output, and the bypass passage opening / closing valve is in an open state to prepare for the next hot water supply. Also, when the opening signal to the bypass passage opening / closing valve is output from the bypass passage opening / closing valve opening / closing operation determination unit, the flow control valve opening amount control unit sets the outlet hot water temperature at the next hot water to the hot water supply set temperature. The opening amount of the flow control valve is controlled to prepare for the next hot water supply.

When hot water is started from the hot water supply standby state, hot water on the hot water supply heat exchanger side and water passing through the bypass passage side are mixed (mixed) at the bypass passage outlet side connection portion of the hot water supply passage, and hot water supply heat exchange is performed. The high-temperature hot water on the hot water side has a lower hot water temperature, and the mixing ratio of the hot water supply heat exchanger side water quantity and the bypass passage side water quantity, that is, the flow rate ratio of the hot water supply heat exchanger to the total incoming water flow rate is a flow control valve. Since the tap water temperature is controlled by the valve opening control of the flow control valve by the valve opening control unit so that the tap water temperature reaches the hot water supply set temperature, the hot water at the hot water supply set temperature is stably discharged at the start of hot water supply.

[0020]

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 7 shows a main configuration of a water heater as a combustion device according to the first embodiment. As shown in the figure, the hot water supply apparatus is provided with a hot water supply heat exchanger 1, an inlet side of the hot water supply heat exchanger 1 is connected to a water supply path 3, and an outlet side thereof is connected to a hot water supply path 4. The hot water supply passage 4 is guided to a hot water tap 19 such as a kitchen. The hot water supply heat exchanger 1 is provided with a fixed bypass passage 5 that short-circuits the inlet side and the outlet side. The fixed bypass passage 5 has a flow rate flowing to the hot water supply heat exchanger 1 side and a flow rate flowing to the fixed bypass path 5 side. The flow ratio is formed so as to be a flow ratio (for example, 7: 3 to 8: 2) determined in advance by the pipe resistance.

Further, it said hot water supply passage 4 V ₁ valve 7 is interposed a flow rate control valve for controlling the opening amount of the flow rate on the downstream side of the fixed bypass passage outlet side connecting portion X. This V
The _first valve 7 in which the valve opening amount is variably controlled by driving means (for example, a stepping motor), during normal hot water supply operation, V ₁ valve 7 is opened to the maximum opening amount is determined in advance, the hot water supply burner Only when the hot water temperature does not rise to the hot water supply set temperature due to insufficient combustion capacity of the hot water, the throttle control of the valve opening amount is performed in accordance with the combustion capacity for hot water at the hot water supply set temperature. Hot water supply passage 4 downstream of the position where V ₁ valve 7 is interposed
And a bypass passage 8 that short-circuits the water supply passage 3 upstream of the fixed bypass passage entrance-side connection portion Y. V ₂ valve 10 is interposed a bypass channel opening and closing valve for opening and closing the passage to the bypass passage 8.

The water heater is provided with a controller 20 for controlling the operation of the water heater, and a remote controller 18 is connected to the controller 20. Remote controller 18 has a hot water temperature setting means 21 for the user of the water heater to set the hot water temperature.
Are formed.

In the drawing, reference numeral 12 denotes a water supply passage 3 from a water supply source.
A flow rate detection sensor for detecting a flow rate of incoming water guided through the water supply passage; 13, an incoming water temperature sensor such as a thermistor for detecting the temperature of incoming water in the water supply passage 3; A hot water supply heat exchanger hot water temperature sensor such as a thermistor for detecting the temperature of the hot water on the exit side is shown. Reference numeral 15 denotes hot water after the hot water on the hot water supply heat exchanger 1 and the water on the fixed bypass passage 5 are mixed. Reference numeral 16 denotes a first tapping temperature sensor such as a thermistor for detecting the temperature. Reference numeral 16 denotes a second tapping temperature sensor such as a thermistor for detecting the temperature of the tap water downstream of the bypass passage outlet connection portion Z of the hot water supply passage 4. It shows.

FIG. 1 shows a main configuration of a control device 20 which is characteristic in the first embodiment. This control device 20 is stopping the hot water supply combustion of the hot water supply burner (during standby for tapping).
So that the temperature of the hot water at the next hot water reaches the hot water supply set temperature.
Comprises a tapping standby control unit 25 that performs valve opening amount control of the switching controller and V ₁ valve 7 of the _second valve 10, the hot water standby control unit 25
Includes a sampling unit 35, and T _2Cal detector 36 is a hot water supply heat exchanger target hot water temperature detecting section, a V ₂ closing operation determination unit 37 is a bypass channel opening and closing valve opening and closing operation determination unit, a flow control valve opening amount and V ₁ opening amount control unit 38 is a control unit, a data storage unit 40
And is configured.

The sampling section 35 is provided with the incoming water temperature sensor 13.
And various sensor outputs such as hot water supply heat exchanger hot water temperature sensor 14,
A configuration is provided in which information of the remote controller 18 (for example, the hot water supply setting temperature of the hot water supply temperature setting means 21) and the like are sampled at predetermined sampling time intervals (for example, one second).

The data storage unit 40 is formed by a storage device, and the following T 2 _cal detection data is stored in the data storage unit 40 in advance. The T 2 _cal detection data indicates the target hot water temperature T of the hot water supply heat exchanger for keeping the hot water temperature at the hot water supply set temperature when the V ₂ valve 10 of the bypass passage 8 is closed.
This is data for detecting 2 _cal , and in the present embodiment, the following equation (1) and a predetermined flow rate ratio m (0 <m <1) of the hot water supply heat exchanger 1 to the total _incoming water flow rate are used. The data is stored in the data storage unit 40 as _T2cal detection data.

T _2cal = (T _s − (1-m) T ₁ ) / m (1)

T _s shown in the above equation (1) represents the hot water supply set temperature, T ₁ represents the incoming water temperature, and the above equation (1) was derived as follows. In other words, in order for the hot water temperature to reach the hot water supply set temperature, the heat quantity J ₀ required to raise the water having the total incoming flow rate Q ₀ guided from the water supply passage 3 from the incoming water temperature T ₁ to the hot water supply set temperature T _{s. (J 0 = (T s -T} 1)
· Q ₀ · C (although C is the specific heat of water) and), the flow rate flowing through the hot water supply heat exchanger 1 of the total incoming water flow rate Q ₀ Q _HE (Q _HE
= M · Q ₀ ) from the incoming water temperature T ₁ to the hot water supply heat exchanger 1
_Required to raise the target hot _water temperature _T2cal to J
_HE (J _HE = (T _2cal −T ₁ ) · Q _HE · C = (T _2cal −T
₁ ) · m · Q ₀ · C) must be equal ((T _s −T ₁ ) · Q ₀ · C = (T _2cal −T ₁ )
· M · Q ₀ · C), the above equation (1) was derived.

The hot water supply to the hot water set temperature of the hot water supply setting means 21 of the remote controller 18 to T _s of the formula (1), the detection input water temperature entering water temperature sensor 13 to T _1, relative to the total water inlet flow rate predetermined for m The flow rate ratio of the heat exchanger 1 (for example, when the V ₂ valve 10 is closed, the incoming water branches and flows to the hot water supply heat exchanger 1 side and the fixed bypass passage 5 side. Since the flow ratio of the flow rate of the fixed bypass passage 5 and the flow rate of the fixed bypass passage 5 is predetermined by the pipe resistance, when the flow rate ratio is, for example, 7: 3, m = 0.7 is predetermined. By performing the calculation according to the expression 1), the target hot water temperature T _2cal of the hot water supply heat exchanger 1 can be calculated.

After the hot water supply burner stops the hot water supply combustion, the T 2 _cal detecting section 36 detects the incoming water temperature T ₁ detected by the incoming water temperature sensor 13 sampled by the sampling section 35 and the hot water set temperature T _s of the hot water temperature setting means 21. , for example, incorporation predetermined time interval (e.g., 1 second) for each, also said from the data storage unit 40 reads out the T _2Cal detection data, the detection input temperature T ₁ and the hot water set temperature T _s and T _2Cal detection data hot water temperature of the hot water based detects calculates a target YuAtsushi T _2Cal of the hot water supply heat exchanger 1 for a hot water set temperature T _s.

In the data storage section 40, a permissible deviation range of the hot water temperature from the set hot water supply temperature is predetermined and stored as a permissible range α (for example, 3 ° C.). Note that 0 ° C. may be given as the allowable range α.

[0033] V ₂ closing operation determination unit 37, a sampling unit
35 that the actual water temperature T ₂ of the hot water supply heat exchanger hot water temperature sensor 14 which is sampled, the T _2Cal detecting unit 36 compares captures the target YuAtsushi T _2Cal of the hot water supply heat exchanger 1 detection, hot water burner by the time the hot water supply combustion is the actual water temperature T ₂ after having stopped is determined to be high beyond the allowable range alpha of the than the target YuAtsushi T _2Cal data storage unit _{40 (T 2> T 2cal +} α), V 2
Since the hot water in a closed state of the valve 10 is started yu enhanced beyond the allowable range from the hot water set temperature results in pouring, V ₂
When it is determined that it is necessary to open the valve 10 and allow the water to flow from the bypass passage 8 to the hot water supply passage 4 at the time of hot water supply to lower the temperature of the hot water in the hot water supply passage 4, the V ₂ opening / closing drive means 41 sends a V ₂ valve open signal (by-pass signal). and outputting an open signal) to the channel opening and closing valve, it causes opening the V ₂ valve 10 by opening operation of the V ₂ closing driving means 41, adding the V ₂ valve open signal to V ₁ opening amount control unit 38 . Allowed to close the output and V ₂ valve 10 (close signal to the bypass passage on-off valve) to V ₂ close drive means 41 V ₂ valve closing signal when the other.

The V ₁ valve opening control section 38 is provided with the data storage section.
T _4cal detection arithmetic expression data (T
_4cal = (T ₂ −T ₁ ) · M + T ₁ ; (where M is a constant), the measured incoming water temperature T _{1 of the} incoming water temperature sensor 13 sampled by the sampling unit 35 and the actual measurement of the hot water supply heat exchanger hot water temperature sensor 14 substituting the water temperature T _2, estimates and calculates detecting water temperature T _4Cal after mixing of the water through the hot water heated by the hot water supply heat exchanger 1 static bypass passage 5.

The T 4 _cal detection arithmetic expression data is data for estimating and detecting the hot water temperature T 4 _cal when the hot water of the hot water supply heat exchanger 1 and the water of the fixed bypass passage 5 are mixed.
The constant M of the 4 _cal detection calculation formula data is the flow ratio of the flow rate Q _HE of the hot water supply heat exchanger 1 to the total flow rate Q _V1 of the flow rate of the hot water supply heat exchanger 1 and the fixed bypass passage 5 (M = Q _HE / Q _V1 ). As described above, since the flow ratio is predetermined, it is given as a constant (for example, M = 0.7). The above T 4 _cal detection arithmetic expression data indicates the amount of heat J _V1 required for the water of the total flow rate Q _V1 of the flow rate of the hot water supply heat exchanger 1 and the flow rate of the fixed bypass passage 5 to rise from the incoming water temperature T ₁ to the hot water temperature T 4 _cal ( J _V1 = (T _4cal -T ₁ ) · Q _V1 · C (where C is the specific heat of water), and the hot water supply heat exchanger 1 determines the flow rate Q _HE of the total flow rate Q _V1 (Q _HE = M · This is derived from the relationship that the amount of heat J _HE (J _HE = (T ₂ −T ₁ ) · Q _HE · C) given to water of Q _V1 ) is equal.

The V ₁ valve opening control section 38 stores the calculated hot water temperature T 4 _cal , the detected incoming water temperature T ₁ sampled by the sampling section 35, the hot water supply set temperature T _s, and the data storage section 40. Calculation calculation formula data (N
= M · (T _s −T ₁ ) / (T _4cal −T ₁ )), and the flow rate of the hot water supply heat exchanger 1 with respect to the total incoming flow rate Q ₀ for the hot water temperature to _reach the hot water supply set temperature T _s. Q _HE flow ratio N
(N = Q _HE / Q ₀ ) is calculated. Said N calculating operation expression data, as described above, hot water hot water temperature is hot water set temperature T _s to become total incoming water flow rate Q ₀ flow rate Q of the hot water supply heat exchanger 1 against for
_This is data for calculating the _HE flow ratio. The constant M of this arithmetic expression data is the same number of constants as the constant M used in the T 4 _cal detection arithmetic expression data, and the hot water supply heat with respect to the total flow rate Q _V1 of the flow rate of the hot water supply heat exchanger 1 and the flow rate of the fixed bypass passage 5. It _shows the flow rate ratio of the flow rate Q _HE of the exchanger 1.

The above-mentioned N calculation formula data indicates that the incoming water temperature T of the total incoming water flow rate Q ₀ is required for the outlet water temperature to reach the hot water supply set temperature.
_The amount of heat J ₀ (J ₀ = (T _s −T ₁ ) · Q ₀ · C) required to heat the water ₁ to the hot water supply set temperature T _s and the V ₁ valve 7 of the total incoming water flow rate Q ₀ The amount of heat J _V1 (J _V1 = (J _V1 = (J _V1 = ()) that the hot water of the passing flow rate Q _V1 (the total flow rate of the flow rate of the hot water supply heat exchanger 1 and the flow rate of the fixed bypass passage 5) rises from the incoming water temperature T ₁ to the hot water temperature T _4cal. T _4cal -T ₁ ) ・ Q _V1 ＣC) and the relationship Q _HE = M ・ Q _V1 as described above.

[0038] Further, V ₁ opening amount control unit 38, when added to V ₂ valve opening signal from the V ₂ closing operation determination unit 37 after the hot water supply combustion stop of hot water burner, the flow rate ratio N calculated above controlling the opening amount of V ₁ valve 7 so as to prepare for the next tapping. It V ₁ valve 7 and in the other cases will be ready for the next tapping at the valve opening amount before stopping the hot water supply.

The V ₁ valve 7 is driven by the V ₁ valve 7.
V ₁ As is known to attach a valve opening amount measuring means such as a position meter and the encoder for measuring the valve opening amount
To be able to measure the opening amount of the valve 7, may be controlled the valve opening amount of V ₁ valve 7 based on the measurement opening amount, when the driving means is formed by a stepping motor the number of pulses of the pulse drive signal applied to the stepping motor and captures the rotational direction of the motor to the controller 20, the amount of opening of the V ₁ valve 7 based on the relationship data in advance the number given pulse and V ₁ valve opening amount To detect
Etc. for controlling the valve opening amount of V ₁ valve 7 based on the detected opening amount, the opening amount control method of V ₁ valve 7 have been proposed various techniques, which techniques of them proposed method May be used, and the description thereof is omitted because the method is well known. Of course, in the data storage unit 40 the valve opening amount control data is a relation data of the flow rate ratio N and V ₁ valve opening amount is given determined by experiment, calculation or the like.

An example of the operation of the hot water supply standby control means 25 having the above configuration will be briefly described with reference to the flowchart of FIG. First, the hot water supply combustion of the hot water supply burner is stopped at step 101 (i.e., becomes in tapping waiting), the hot water set temperature T _s and the detected incoming water temperature T ₁ of the sampling unit 35 is sampled in step 102. T _2Cal detector 36 Capture, step 10
3, the hot water supply set temperature T _s and the detected incoming water temperature T ₁ ,
Based on the T _2cal detection data in the data storage unit 40,
_2cal detector 36 target YuAtsushi hot water hot water in the closed state of the hot-water heat exchanger 1 for a hot water set temperature T _s of the V ₂ valve 10 T
_{Calculate 2cal} .

[0041] In step 104, V ₂ closing operation determination unit 37 is a target YuAtsushi T _2Cal and hot-water supply heat exchanger hot water temperature sensor calculated above
Comparing 14 measured hot water temperatures T ₂ , T ₂ is _higher than T _2cal beyond the set range (allowable range) α (T ₂ > (T _2cal + α))
And when it is determined, at step 105, it is determined that the next pouring hot water temperature during tapping in the closed state of V ₂ valve 10 is increased beyond the allowable range α from the hot water set temperature T _s, V ₂ valve open signal the causes opening the V ₂ valve 10 is output to the V ₂ close drive means 41, adding V ₂ valve open signal to V ₁ opening amount control unit 38.

[0042] In step 106, V ₁ opening amount control unit 38 receives the V ₂ valve-open signal, the T _4Cal detection calculation formula data and N calculated arithmetic expression data of the data storage unit 40, the hot water set temperature T _s And the detected hot water temperature T ₁ and the actually measured hot water temperature T _{2 of the} hot water supply heat exchanger 1, the hot water supply for the total incoming flow rate Q ₀ so that the hot water temperature at the next hot water becomes the hot water supply set temperature T _s. The flow rate ratio N of the flow rate Q _HE of the heat exchanger 1 (N = Q _HE / Q ₀ ) is detected.
The opening amount of _one valve 7 is controlled.

[0043] Then, at step 108, V ₂ closing operation determination unit 37 takes in the measured water temperature T ₂ of the following hot-water supply heat exchanger 1, in step 104, this measured water temperature T ₂ detected target YuAtsushi T _{The two cals} are compared, and when it is determined that T ₂ > T _2cal + α, the operation from step 105 is repeated. When it is determined in step 104 that T ₂ ≦ T _2cal + α, the V ₂ opening / closing driving means is determined in step 109. 41 is closed the output to V ₂ valves 10 V ₂ valve close signal to, while repeating the operation of step 104 and subsequent ready for the next tapping.

[0044] According to this embodiment, since the hot water supply combustion of the hot water supply burner is stopped, hot water hot water during the next pouring in a closed state of V ₂ valve 10 is predetermined from the hot water set temperature T _s When it is determined that the value exceeds the allowable range α,
Opening the V ₂ valve 10, the flow rate ratio of the flow rate Q _HE hot water supply heat exchanger 1 to the total water inlet flow rate Q ₀ by controlling the valve opening amount of V ₁ valve 7 as hot water hot water is hot water set temperature T _s Since N was controlled in the direction of decreasing and prepared for the next hot water, for example,
Even though the hot water in the hot water supply heat exchanger 1 is post-boiled and becomes overshoot water, the hot water tap 19 is opened and the hot water starts flowing out of the hot water supply source, and even if the overshoot water flows out of the hot water supply heat exchanger 1, The water from the fixed bypass passage 5 and the bypass passage 8 is mixed with the overshoot water to lower the temperature of the hot water.
In other words, the flow rate ratio N in order to tapping hot water temperature is controlled to be equal to the hot water supplying set temperature T _s, the hot water of the hot water set temperature T _s can be tapped. This makes it possible to avoid a problem that the user of the hot water gives discomfort due to the high-temperature hot water when the hot water is discharged.

As described above, the V _{2 of the} bypass passage 8 is
Open the valve 10, since only by controlling the opening amount of V ₁ valve 7, it is possible to easily control the total water inlet flow rate Q ₀ flow rate ratio N of the hot water supply heat exchanger 1 for the bypass passage and Since there is no need to provide the on-off valve any more, the pipeline configuration is simple, the cost can be reduced, the increase in pipeline resistance can be suppressed, and a large amount of hot water at the set hot water supply temperature can be supplied. It is possible to

The combustion equipment to which the hot water standby control means 25 is applied is not limited to the water heater shown in FIG.
A hot water supply heat exchanger 1, the bypass passage 8 and V ₂ valve 10 for short-circuiting side incoming and outgoing side of the hot water supply heat exchanger 1, and V ₁ valve 7 provided on the upstream side of the bypass passage outlet-side connecting portion Z The hot water supply standby control means 25 can be applied to any combustion apparatus having a hot water supply heat exchanger hot water temperature sensor 14 and hot water supply temperature setting means 21. For example, FIG. 9 shows another example of a water heater that is a combustion device to which the hot water supply standby control unit 25 according to the first embodiment is applied. This water heater has a configuration in which a bath filling function and a high-temperature hot water supply function are added to the configuration of the water heater shown in FIG. As shown in the figure, one end of a passage 23 is connected to a hot water supply passage 4 of the water heater, and the other end of the passage 23 is connected to a pouring control valve such as a solenoid valve.
It is led to a bathtub 24 via 22, for example, a pouring control valve
22 is opened and hot water heated by hot water
The bath is filled with water and hot water is supplied to the bathtub 24 through the bath.

As described above, when hot water or hot water is supplied, the hot water temperature of the hot water supply heat exchanger is usually higher than when hot water is supplied. Hot water having a temperature higher than that at the time of hot water supply will stay in the hot water supply heat exchanger 1, and after-boiling will occur, and the hot water temperature of the hot water staying in the hot water supply heat exchanger 1 will further increase. As described above, when hot water tap 19 is opened and hot water supply is started from a state where hot water stays in hot water supply heat exchanger 1 at the time of hot water supply, hot water flows out of hot water supply heat exchanger 1 first. Therefore, there arises a problem that hot water having a temperature higher than the set hot water supply temperature gives discomfort to a user of tap water. In particular, there is a problem that when a very high-temperature stagnant hot water created for high-temperature hot water flows out of the hot water supply heat exchanger 1 at the start of hot water supply and gives out hot water, a user of the hot water may be burned. The above-described problem can be avoided by providing the hot water standby control means 25 shown in the first embodiment in the control device 20 and performing the hot water standby operation.

FIG. 8 shows an example of a combined water heater that is a combustion device to which the hot water supply standby control means shown in the first embodiment is applied. This combined water heater has a hot water filling function, a high-temperature hot water supply function,
It has a configuration in which a bath function such as a reheating function is added. As shown in FIG. 8, in addition to the hot water supply system configuration shown in FIG. 7, this combined hot water supply system includes a bath burner (not shown) and bathtub water introduced by driving a circulation pump 28 to generate heat of combustion of the bath burner. A reheating cycle 27, which is heated by the reheating heat exchanger 26 and returned to the bathtub 24, a filling passage 30 connecting the reheating circuit 27 and the hot water supply passage 4, and a pouring opening and closing the passage. The control valve 22 is provided, for example, the pouring control valve 22 is opened, the hot water warmed by the hot water supply heat exchanger 1 is dropped into the bathtub 24 through the hot water passage 30 and the reheating circuit 27, and Filling the water, hot water supply in the same manner, driving the circulation pump 28, recirculate the bath water in the reheating circuit 27, and use the heat of the bath burner combustion to reheat the heat exchanger 26. It is possible to reheat a bath by heating at a temperature.

The hot water supply standby control means 25 is provided in the control device 20 of the combined water heater to perform the hot water supply standby operation, thereby causing a problem of discomfort to a user of the hot water due to high-temperature hot water supply at the time of hot water supply. Further, it is possible to avoid the danger that the user of the hot water may burn the user due to the hot water.

FIG. 10 shows an example of a water heater of a one-can-two-water configuration, which is a combustion apparatus to which the hot water supply standby control means shown in the first embodiment is applied. This water heater is obtained by adding a bath function such as a hot water filling function, a hot water supply function, and a reheating function to the configuration of the water heater shown in FIG. 7, and the hot water supply burner also functions as a bath burner. The hot water supply heat exchanger 1 is provided with a hot water supply pipe 47 through which hot water flows and a reheating pipe 48 through which bathtub circulating water flows. The hot water supply pipe 47 is connected to the inlet side of the hot water supply pipe 47 and the hot water supply path 4 is connected to the outlet side thereof. The reheating pipe 48 is connected to the reheating circuit 27 for circulating the hot water in the bathtub 24. It is interposed.

When the hot-water tap 19 is opened, for example, the hot-water supply burner performs hot-water combustion of the hot-water supply burner, and heats the water guided from the water-supply passage 3 by the hot-water supply heat exchanger 1. Then, a hot water supply operation is performed in which the hot water passes through the hot water supply passage 4 and is discharged through the hot water tap 19. In addition, this water heater drives, for example, a circulation pump 28 to circulate water in the bathtub 24 in the reheating circuit 27, and performs reheating combustion by heating the hot water supply burner to perform reheating operation alone.

In the water heater having a one-can, two-water configuration as shown in FIG. 10, the hot water in the hot water supply line 47 of the hot water heat exchanger 1 is also heated by the reheating combustion of the hot water supply burner in the reheating alone operation. The next time the hot water is supplied, the hot water that is higher than the set hot water supply temperature flows out, and as described above, there is a problem that the user of the hot water gives discomfort due to the high hot water and a problem that there is a danger of burns due to the high temperature hot water. Occurs. Therefore,
By providing the hot water standby control means 25 in the control device 20 and performing the hot water standby operation, the hot water in the hot water supply pipe 47 of the hot water heat exchanger 1 is heated by the additional heating of the hot water supply burner by the additional heating operation. , even it has become higher than the hot water supply heat exchanger hot water temperature during hot water supply, the valve opening amount control of the on-off valve control and V ₁ valve 7 of V ₂ valve 10 as shown in embodiment of the first embodiment By doing so, hot water at the set hot water supply temperature can be discharged at the time of tapping, and the above problem can be avoided.

Hereinafter, a second embodiment will be described. This embodiment is directed to a single-function water heater as shown in FIG. 7, and a characteristic of this embodiment is not to actually measure the hot water temperature of the hot water supply heat exchanger 1, FIG.
As shown in the figure, the hot water supply standby control means 25 of the control device 20 is provided with an estimated T ₂ detecting section 42 and a time measuring means 43 which are an estimated hot water temperature detecting section for the hot water supply heat exchanger. ₂ was estimated detection, opening and closing control and V of V ₂ valve 10 as hot water hot water at the next tapping after the hot water supply combustion is stopped in the hot-water supply burner temperature using the estimated water temperature T ₂ is equal to the hot water supplying set temperature ₁ valve 7
The valve opening amount control is performed to prepare for the next hot water supply. Other configurations are the same as those of the first embodiment, and the duplicate description will be omitted. Hot water supply standby control means 25 of control device 20 which is characteristic in this embodiment
Sampling unit 35, T 2 _cal detecting unit 36, V ₂ opening / closing operation determining unit 37, V ₁ opening / closing amount control unit 38, data storage unit 40
, An estimated T ₂ detecting unit 42 and a time measuring unit 43.

The data storage section 40 stores, in addition to the T 2 _cal detection data, the T 4 _cal detection calculation formula data, and the N detection calculation formula data shown in the first embodiment, the hot water temperature characteristic of the hot water supply heat exchanger. The retained hot water temperature characteristic data, which is data, is stored in advance. The retained hot water temperature characteristic data is data relating to the elapsed time from the stoppage of hot water supply and the retained hot water temperature of the hot water supply heat exchanger 1, and is obtained in advance by experiments, calculations, and the like.
Are stored in the data storage unit 40 in a data format such as graph data, arithmetic expression data, and table data shown in FIG.

The time measuring means 43 has a structure for measuring the elapsed time from the stop each time hot water combustion of the hot water supply burner is stopped. The estimated T ₂ detecting section 42 detects the time after the hot water supply combustion of the hot water supply burner stops. Next, the hot water temperature T ₂ of the hot water supply heat exchanger 1 is estimated at predetermined time intervals (for example, one second) based on the measured time of the time measuring means 43 and the accumulated hot water temperature characteristic data of the data storage unit 40. To detect.

[0056] V ₂ closing operation determination unit 37, since the hot water supply combustion of the hot water supply burner is stopped, in advance for each predetermined time interval (e.g. one _second), T 2cal detector 36 hot water supply heat exchanger is detected by the 1 a target YuAtsushi T _2Cal of the estimated T ₂ detecting section 42 compares captures the estimated hot water temperature T ₂ of the estimated detected hot water supply heat exchanger 1, the estimated hot water temperature T ₂ data than the target YuAtsushi T _2Cal Storage
When it is determined that the _temperature exceeds the allowable range α of 40 (T ₂ > T _2cal + α), the V ₂ valve is used in the same manner as in the first embodiment.
Pouring hot water temperature during the next tapping in the closed state of 10 is determined to be higher than the hot water set temperature, it causes opening the V ₂ valve 10 outputs the V ₂ valve open signal to V ₂ close drive means 41, Add V ₂ valve open signal to V ₂ the valve opening amount control unit 38. Otherwise when to output closed state V ₂ valves 10 V ₂ valve close signal to V ₂ close drive means 41.

[0057] V ₁ opening amount control unit 38, when the V ₂ valve opening signal is applied, the estimated hot water temperature T ₂ and the detection input temperature T ₁ and the hot water set temperature T _s and the data storage unit 40 T _4cal
Based on the detected operation expression data and N calculated arithmetic expression data, the similar first exemplary embodiment, the control valve opening degree of V ₁ valve 7 as hot water hot water temperature during the next tapping is hot water set temperature And prepare for the next hot spring.

According to this embodiment, similarly to the first embodiment, it is possible to discharge a large amount of hot water at the set hot water supply temperature at the start of hot water supply with a simple pipe configuration. A periodical effect can be achieved. Further, instead of actually measuring the hot water temperature hot-water supply heat exchanger 1, and estimated detection, switching control and V ₁ valve V ₂ valve 10 using the estimated water temperature 7
Since it is configured to perform a valve opening amount control, even when a situation that the hot water supply heat exchanger hot water temperature sensor 14 is the sensor output T ₂ failed is largely different from the actual water temperature, this embodiment in its sensor output is not used, the as, since it is performed the opening amount control of the switching controller and V ₁ valve 7 of V ₂ valve 10 using the estimated water temperature, hot water temperature of the hot water is hot water set temperature become exactly as it is possible to perform the valve opening amount control of the switching controller and V ₁ valve 7 of V ₂ valve 10, the high-temperature hot water is tapped by the user to and disadvantageously discomfort hot water The danger caused by tapping can be avoided.

Hereinafter, a third embodiment will be described. This embodiment is a combustion apparatus having the water heater system shown in FIG. 7, for example, the water heater shown in FIG.
Other than the above, the combined water heater of FIG. 8, the multifunctional water heater of FIG. 9, and the water heater of one can and two water configuration of FIG.
The feature of the third embodiment is that the T 2 _cal detection unit 36 shown in each of the above embodiments is not provided, but as shown in FIG.
25, and by providing the flow rate calculation unit 44, instead of performing a closing determination operation of V ₂ valve 10, the above flow ratio calculating section 44 calculates on the basis of the residence hot water temperature of the hot water supply heat exchanger 1 is that where the structure for opening and closing determination operation of V ₂ valve 10 on the basis of the flow ratio. Other configurations are the same as those of the above-described embodiments, and the description thereof will not be repeated.

In this embodiment, the hot water supply heat exchanger hot water temperature sensor 14 may be used as hot water supply heat exchanger hot water temperature information detecting means, or the control device 20 may be used as hot water supply heat exchanger hot water temperature information detecting means. Estimated T ₂ detection unit 42
And a time measuring means 43. The flow ratio calculating section 44, a detection water temperature T ₂ of the said hot-water supply heat exchanger hot water temperature information detecting means, and detects incoming water temperature T ₁ of the incoming water temperature sensor 13, a hot water set temperature T _s of the hot water supply temperature setting means 21 , N _cal detection arithmetic expression data (N _cal =
((T _s + α) -T ₁ ) / (T ₂ −T ₁ )), so that hot water higher than the hot water supply set temperature T _s by a predetermined allowable range α (for example, 3 ° C.) is discharged. Total incoming water flow Q ₀
The flow rate ratio N _cal of the flow rate Q _HE of the hot water supply heat exchanger 1 to the flow rate N _cal is calculated.

The N _cal detection calculation formula data is a calculation formula for calculating the flow rate ratio N _cal , and is derived similarly to the N calculation calculation formula data described in each of the above embodiments. The detailed description of the procedure for deriving the N _cal calculation expression data is the same as the procedure for deriving the N calculation expression data, and a description thereof will be omitted.

The data storage unit 40 stores a flow rate ratio M (M (M) of the flow rate Q _HE of the hot water supply heat exchanger 1 to the total flow rate Q _V1 of the predetermined flow rate of the hot water supply heat exchanger 1 and the flow rate of the fixed bypass passage 5. = Q _HE / Q _V1 ; (for example, M = 0.7) is stored as the reference flow ratio.

The V ₂ opening / closing operation judging section 37 _fetches and compares the calculated flow rate ratio N _{cal of the} flow rate ratio calculating section 44 with the reference flow rate ratio M of the data storage section 40 after the hot water supply burner stops hot water supply combustion. N _cal falls below M when it is determined that the (M> N _cal), the next hot water tapping hot water temperature is set from the hot water supply set temperature T _s range during at closed state of V ₂ valve 10 (tolerance alpha) It was determined that becomes high beyond, V ₂ close drive means 41
To output a V ₂ valve open signal, it causes opening the V ₂ valve 10, addition of V ₂ valve open signal to V ₁ opening amount control unit 38. The No. V ₁ valve closing signal is output to the V ₂ close drive means 41 in the other cases, the V ₂ valve 10 in a closed state.

[0064] V ₁ opening amount control unit 38 receives the V ₂ valve opening signal of the V ₂ closing operation determination unit 37, the embodiment similarly to each exemplary, tapping hot water for the next hot water is hot water the amount of opening of the V ₁ valve 7 such that the set temperature T _s, that is, to control the flow rate ratio N of the flow rate Q _HE hot water supply heat exchanger 1 to the total water inlet flow rate Q _0.

According to this embodiment, excellent effects similar to those of the above embodiments can be obtained.

Hereinafter, a fourth embodiment will be described.
The characteristic of this embodiment is that an external air temperature sensor 32 for detecting the external air temperature around the water heater is provided as shown by a dashed line in FIG. 7, and an estimated T ₂ shown in FIG. 3 and FIG.
When forming the detection unit 42 and the time measuring means 43 for estimating detecting water temperature T ₂ of the hot water supply heat exchanger 1, the outside temperature sensor 32
Detection out is to have a configuration to correct the estimated water temperature T ₂ in accordance with the temperature, and the other configuration is the same embodiment of the respective embodiments, the description will not be repeated.

[0067] hot water temperature correction data for the data storage unit 40 to correct the estimated water temperature T ₂ in accordance with the ambient temperature (e.g., relationship data of the outside air temperature and the estimated hot water temperature correction coefficient) by the pre-experiment or calculation, etc. Sought and stored.

The estimated T ₂ detector 42 estimates and detects the hot water temperature T ₂ of the hot water supply heat exchanger 1 in the same manner as in the second embodiment, and uses the estimated hot water temperature T ₂ as the detected outside air temperature of the outside air temperature sensor 32. Is corrected based on the hot water temperature correction data in the data storage unit 40. For example,
When the hot water temperature correction data is composed of data relating to the outside air temperature and the estimated hot water temperature correction coefficient, an estimated hot water temperature correction coefficient corresponding to the detected outside air temperature is detected based on the hot water temperature correction data, and the temperature T ₂ by multiplying the detected estimated hot water temperature correction coefficient to correct. As described above, the corrected estimated hot water temperature T ₂ ′ is detected as the estimated hot water temperature T ₂ .

According to this embodiment, the outside air temperature sensor
32 is provided, since a configuration to correct the estimated water temperature T ₂ of the hot water supply heat exchanger 1 according to the detection air temperature of the outside air temperature sensor 32, to more accurately estimate the water temperature T ₂ of the hot water supply heat exchanger 1 Detection This makes it possible to avoid the problem of giving a user of the hot water discomfort due to the high-temperature hot-water tapping at the time of tapping and the danger of the hot-water tapping.

Table data and calculation formulas for determining the staying hot water temperature of the hot water supply heat exchanger 1 based on the staying hot water temperature characteristic data in consideration of the outside air temperature, that is, the elapsed time since the stop of hot water supply and the outside air temperature. Data and graph data are obtained in advance by experiments and calculations and stored in the data storage unit 40, based on the measurement time of the time measuring unit 43, the detected outside air temperature of the outside air temperature sensor 32, and the staying hot water temperature characteristic data. If the hot water temperature of the hot water supply heat exchanger 1 is estimated and detected, the hot water temperature of the hot water supply heat exchanger 1 can be accurately determined without performing the correction of the estimated hot water temperature as shown in this embodiment. Estimation can be detected.

Hereinafter, a fifth embodiment will be described. A characteristic of the fifth embodiment is that a plurality of hot water supply heat exchanger hot water sensors are provided at different locations on the hot water supply heat exchanger 1 side.
14 and a plurality of hot-water supply heat exchanger hot-water sensors 14 (14a, 14b, 14c) as shown in FIG. ) and the detection hot water it has T ₂ the calculator 45 is provided configured as a hot water supply heat exchanger water temperature calculation unit for performing arithmetic processing temperature of the other configuration is the same embodiment of the respective embodiments.

[0072] In FIG. 5, since the block configuration of the sampling unit 35 and the data storage unit 40 and the T ₂ calculator 45 other tapping standby control unit 25 is similar to FIG. 1 or FIG. 3 or FIG. 4, the The illustration is omitted, and the overlapping description is omitted.

By the way, in the single-can, two-water hot water supply system as shown in FIG. 10, when the reheating operation is performed alone, the reheating combustion of the hot water supply burner causes the hot water supply line 47 of the hot water supply heat exchanger 1 to operate. The temperature of the hot water stays in the room. When only one hot water supply heat exchanger hot water temperature sensor 14 is provided due to this temperature unevenness, the detected hot water temperature of the hot water supply heat exchanger hot water temperature sensor 14 and the hot water supply pipe 47 of the hot water supply heat exchanger 1 The average hot water temperature when the hot water temperature of the stagnant hot water is made uniform may be large, and at the time of hot water supply, the hot water in the hot water supply pipe 47 is agitated by the water flow and the temperature is made uniform and flows out.
The detected hot water temperature may greatly differ from the hot water temperature of the hot water flowing out of the hot water supply pipe 47. Even when the hot water standby operation is performed as in each of the above embodiments, the detected hot water temperature exceeds an allowable range from the hot water supply set temperature at the time of hot water supply. There is a possibility that a problem may occur that the hot water having a high temperature gives a discomfort to a user of the hot water.

Therefore, in this embodiment, as shown in FIG. 10, a plurality of hot water supply heat exchanger hot water temperature sensors 14a, 14b, and 14c are provided at different locations in the hot water supply pipe 47 of the hot water supply heat exchanger 1. (For example, provided at the U-shaped bent portion (U-bend) of the hot water supply pipe 47 and at the exit side of the hot water supply pipe 47), as described above.
The tapping standby control unit 25 of the control device 20, as shown in FIG. 5, and a configuration in which a T ₂ calculation section 45.

The T ₂ calculating section 45 takes in the detected hot water temperatures T _2a , T _2b , T _2c of the hot water supply heat exchanger hot water sensors 14a, 14b, 14c through the sampling section 35, and detects the detected hot water temperatures T _2a , T _2b , T _2c.
2a , T _2b , T _2c and the average hot water temperature in the hot water supply pipe 47 (the hot water temperature in the hot water supply pipe 47 is made uniform based on the average hot water temperature calculation data stored in the data storage unit 40). the water temperature) when determined, to detect the average water temperature as measured water temperature T _2.

The above-mentioned average hot water temperature calculation data is supplied to the hot water supply line 47.
An arithmetic expression data for calculating the average water temperature T ₂ of the inner, for _{example, T 2 = (T 2a +} T 2b + T 2c) · K, _{or, T 2 = K a · T} 2a + K b · T 2b + K _c , T _2c , etc., which are given in advance and are constants K, K _a ,
K _b and K _c are obtained in advance through experiments, calculations, and the like. For example, the detected water temperature T _2a, T _2b, when the simple average of the T _2c, the above constant _{K, K a, K b,} K c
Is 1 / n (where n is the number of hot water temperatures to be detected,
In this embodiment, n = 3) is given.

[0077] According to this embodiment, obtains the average water temperature in the hot-water supply heat exchanger 1 (the hot water supply conduit 47), since the structure for detecting the water temperature as measured water temperature T _2, for example, Even when the temperature of the hot water in the hot water supply pipe 47 has uneven temperature, the temperature of the hot water flowing from the hot water supply pipe 47 at the time of hot water supply, that is, according to the average hot water temperature, becomes the hot water supply set temperature. the valve opening amount control of the switching controller and V ₁ valve 7 of V ₂ valve 10 is to be carried out accurately, high-temperature water exceeds the allowable range from the hot water set temperature is tapped at tapping, in hot water at user The problem of giving discomfort and danger due to hot water can be prevented.

The present invention is not limited to the above-described embodiments, but can adopt various embodiments.
For example, V ₂ closing operation determination unit 37 shown in FIG. 3, the actual water temperature of the hot water supply heat exchanger hot water temperature sensor 14 captures through the sampling unit 35, closing the determination of V ₂ valve 10 based on the measured water temperature performs an operation, V ₁ opening amount control unit 38, rather than using the actual water temperature, performs valve opening amount control of V ₁ valve 7 using the detected estimated water temperature estimation T ₂ detecting section 42, It is good also as a structure which stands by hot water so that hot water temperature becomes hot water supply set temperature.

[0079] Also, for example, V ₂ closing operation determination unit 37,
It opens and closes determination operation of V ₂ valve 10 using the detected estimated water temperature estimation T ₂ detecting section 42, V ₁ opening amount control unit 38 using measured water temperature of the hot water supply heat exchanger hot water temperature sensor 14 V _The valve opening amount of _one valve 7 may be controlled so that the hot water is kept at the hot water supply standby temperature so as to reach the hot water supply set temperature.

Further, in each of the above embodiments, the V ₁ valve opening control section 38 determines the valve opening amount of the V ₁ valve 7 based on the detected flow rate ratio N
(N = Q _HE / Q ₀ ), the variable control is continuously performed in response to the change of the flow ratio. For example, as shown in Table 1, the detected flow ratio N is a predetermined flow rate. opening amount when the ratio N ₁ or more and less than the flow rate ratio N ₂ is a _1, N is N
₂ or more and N opening amount when less than ₃ A as of _2, total incoming water flow rate stepwise opening amount of V ₁ valve 7 corresponding to the flow rate ratio N of the hot-water supply heat exchanger 1 for (two or more stages) predetermined it is stored in the data storage unit 40 as the valve opening amount control data, V ₁ opening amount control unit 38, V ₂ closing operation determination unit 37
When subjected to V ₂ the valve opening signal from said data storage unit
It may be controlled the amount of opening of the stepwise V ₁ valve 7 based on the 40 of the valve opening amount control data.

[0081]

[Table 1]

[0082] As specific examples, maximum in response to a change in flow ratio determined in advance the valve opening amount of V ₁ valve 7, minimum, to perform the variable control on the three stages of maximum and minimum of the intermediate .

Further, in the fifth embodiment, three hot water supply heat exchangers 14a, 14b and 14c are provided in the hot water supply pipe line 47 of the hot water supply heat exchanger 1. The number of hot water supply heat exchanger hot water temperature sensors 14 provided at different places in the road 47 is 2
Or four or more. In such a case, the fifth
The average hot water temperature of the hot water supply pipe 47 can be detected in the same manner as in the embodiment.

Furthermore, although the hot water heater shown in FIGS. 7 to 10 is provided with the fixed bypass passage 5, even in the water heater in which the fixed bypass passage 5 is omitted, the hot water supply standby is performed similarly to the above-described embodiments. By performing the operation, it is possible to avoid the problem that hot water having a temperature exceeding the allowable range from the set hot water supply temperature when dispensing the hot water causes discomfort to the user of the hot water and the danger caused by the high temperature hot water. When the fixed bypass passage 5 is omitted as described above, the configuration of the pipeline can be simplified accordingly.

As described above, the fixed bypass passage 5
Is omitted, the entire flow rate Q _V1 shown in FIG. 7 flows into the hot water supply heat exchanger 1, so that the flow rate Q _HE = flow rate Q
_{V1 becomes,} T 2cal detection data shown in embodiments of the above embodiments _{(T 2cal = (T s -} (1-m) T 1) / m), T 4cal
Detection formula data (T _4cal = (T ₂ −T ₁ ) · M +
T ₁ ), N calculation expression data (N = M · (T _s −T ₁ ))
/ (T _4cal -T ₁ )) constant m, M (m = M = Q _HE / Q
_V1 ) is given "1" in advance.

Further, in each of the above-described embodiments, the flow rate detection sensor 12 is provided in the water supply passage 3 upstream of the inlet-side connection portion of the bypass passage 8. However, as shown by a dotted line in FIG. The flow rate detection sensor 12 may be provided in the water supply passage 3 downstream of the passage entrance side connection portion.

In the case where the flow rate detection sensor 12 is provided on the upstream side of the bypass passage entrance side connection portion as shown in each of the above embodiments, regardless of whether the V ₂ valve 10 is open or closed, The total incoming water flow rate Q ₀ can be accurately detected, and as described above, when the flow detection sensor 12 is provided downstream from the bypass passage entrance side connection portion, the flow detection sensor 12 is fixed to the flow rate of the hot water supply heat exchanger 1. Total flow Q _V1 of the flow in the bypass passage 5
Can be measured, and based on the flow rate ratio of the flow rate Q _HE of the hot water supply heat exchanger 1 to the flow rate Q _V1 ,
It is possible to accurately detect the flow rate flowing into the device. From this, it was confirmed that all of the hot water that had stayed in the hot water supply heat exchanger 1 started flowing out of the hot water supply start and then flowed out, and the inside of the hot water supply heat exchanger 1 was replaced with new water supplied from the water supply source. it can be, for example, after the tapping is initiated, and detects that all outflow water staying in the hot water supply heat exchanger before tapping begins, thereafter, closed and V ₂ valve 10 Flow rate detection sensor, such as shifting to normal hot water supply operation
It is possible to determine the closing timing of the tapping since the start of the V ₂ valve 10 by using the sensor output 12.

Further, in the fifth embodiment, FIG.
Although described as an example of a water heater of one can and two water configuration shown in 10,
For example, a plurality of hot water supply heat exchanger hot water temperature sensors 14 are provided at different locations in the hot water supply heat exchanger 1 of the hot water supply shown in FIGS.
A T ₂ calculator 45 is provided as in the fifth embodiment,
Based on the average hot water temperature of T ₂ calculation section 45 performs a valve opening amount control of the switching controller and V ₁ valve 7 of V ₂ valve 10 may be tapped wait.

Further, in each of the above embodiments, T _2cal
Arithmetic expression detection unit 36 is a T _2Cal detection data _(T 2cal =
_{(T s - (1-m} ) T 1) / m) targets based on YuAtsushi T
_{Although 2 cal} was detected, for example, table data and graph data for detecting the target hot water temperature T 2 _cal are obtained in advance from the relationship between the set hot water supply temperature T _s and the incoming water temperature T ₁ , and the data storage unit is used as T 2 _cal detection data. 40, and the target hot _water temperature T _2cal is detected based on the T _2cal detection data.
T _2cal may be detected by another method not using an operation.

[0090] Further, in the embodiment the above embodiments, V ₁ opening amount control unit 38, the total hot water hot water is for the hot water supply set temperature on the basis of the T _4Cal detection calculation formula data and the N calculated arithmetic expression data seeking flow ratio N of the hot water supply heat exchanger 1 for the incoming water flow rate, but had done the opening amount control of V ₁ valve 7, for example, to detect the flow rate ratio N from a relationship hot water set temperature and inlet coolant temperature flow ratio as by other methods without using the calculation that previously obtained in advance table data and graph data, etc., to detect the flow rate ratio N using the data and performs the valve opening amount control of V ₁ valve 7 it may perform valve opening amount control of V ₁ valve 7 seeking N.

Further, in each of the above embodiments, the hot water temperature of the hot water supply heat exchanger 1 is detected by using the hot water supply heat exchanger hot water temperature sensor 14, but the hot water stays in the hot water supply heat exchanger 1 When the hot water is detected, the hot water temperature detected by the hot water supply heat exchanger hot water temperature sensor 14 and the hot water temperature detected by the first hot water temperature sensor 15 are substantially the same. it may be used as a hot water temperature T ₂ of the heat exchanger 1.

Further, in the second and fourth embodiments, the single-function water heater shown in FIG. 7 is taken as an example, and the temperature of the hot water in the hot water supply heat exchanger 1 during standby for hot water supply is estimated and detected. Hot-water supply standby control means for performing a hot-water supply standby operation based on the estimated hot water temperature
25 has been described, but the hot water supply of FIGS. 8 and 9 may similarly perform the hot water standby operation by estimating the stagnant hot water temperature of the hot water supply heat exchanger 1, and performing the hot water standby operation in this manner. In addition, it is possible to prevent high-temperature tapping when tapping. In addition, in the water heater of the one-can-two-water configuration shown in FIG. Is heated and the hot water temperature rises, in order to accurately estimate and detect the retained hot water temperature, in addition to the retained hot water temperature characteristic data after the stop of the hot water supply burner combustion, the hot water supply heat exchanger during reheating alone operation. The hot water temperature characteristic data that changes with time of the staying hot water temperature in the hot water supply pipe 47 is obtained in advance by using the time and the reheating combustion capacity of the hot water supply burner as parameters, and stored in the data storage unit 40. If the accumulated hot water temperature is estimated and detected based on the same, the accumulated hot water temperature can be accurately estimated and detected even when the accumulated hot water is heated by the reheating combustion of the hot water supply burner in the reheating alone operation, and the estimated hot water temperature can be detected. Based on Hot tapping during tapping can be prevented by performing the embodiment similarly tapped standby operation of each of the above embodiments.

Further, in each of the above embodiments, the flow ratio (fixed bypass ratio) of the hot water supply heat exchanger 1 to the total incoming water flow rate.
Although m is a predetermined fixed value, the fixed bypass ratio m may be automatically corrected and updated during the normal hot water supply operation according to the following equation (2).

M = (T _S −T ₁ ) / (T ₂ −T ₁ ) (2)

The fixed bypass ratio m may vary due to individual differences, aging deterioration, machining accuracy, etc. of the combustion equipment. However, as described above, the variation is corrected by correcting and updating the fixed bypass ratio m. Thus, it is possible to more reliably prevent the hot water from being discharged at the time of tapping.

[0096]

According to the present invention, after the hot-water supply combustion of the hot-water supply burner is stopped, that is, during standby for hot water supply, if the bypass passage opening / closing valve is in the closed state, the set temperature exceeds the set temperature at the next hot water supply. When it is determined that hot water is coming out,
Opening the bypass passage opening and closing valve, controlling the opening amount of the flow control valve so that the tap water temperature becomes the hot water supply set temperature, variably controlling the flow ratio of the hot water supply heat exchanger to the total incoming water flow rate, and preparing for the next hot water supply; As a result, it is possible to prevent high-temperature hot water resulting from the post-boiling of the hot-water supply heat exchanger from flowing out at the time of tapping. It is possible to prevent hot water used for hot water filling and hot water pouring from hot water at the time of hot water pouring after the end of hot water pouring. The stagnant water on the hot water supply side of the hot water supply heat exchanger is heated by the reheating combustion of the hot water supply burner in isolated operation, and it is possible to prevent high-temperature hot water from flowing out at the start of hot water supply. The problem of discomfort caused by the hot water It is possible to avoid the danger caused by temperature hot water.

Further, a bypass passage for short-circuiting the inlet side and the outlet side of the hot water supply heat exchanger and an opening / closing valve thereof are provided, and a flow control valve is provided only in the hot water supply passage upstream of the bypass passage outlet side connection (necessary). In other words, by simply providing a fixed bypass passage according to the requirements), that is, by merely providing the minimum required bypass passage and its on-off valve and a flow control valve, the flow ratio of the hot water supply heat exchanger to the total incoming water flow can be varied as described above. It becomes possible to control. For this reason, the pipeline configuration and the control configuration are simplified, and it is possible to reduce costs.
Since an increase in pipeline resistance is suppressed, a large amount of hot water at the hot water supply set temperature can be supplied.

In the configuration in which the opening / closing control of the bypass passage opening / closing valve and the valve opening control of the flow rate control valve are performed using the measured hot water temperature of the hot water supply heat exchanger hot water sensor as described above, the measured hot water temperature is used. Since it is used, according to the hot water temperature fluctuation of the hot water supply heat exchanger,
The opening and closing control of the bypass passage opening and closing valve and the valve opening control of the flow control valve can be performed. Can be prevented.

In a configuration in which the temperature of the hot water staying in the hot water supply heat exchanger is estimated and detected, the opening / closing control of the bypass passage opening / closing valve and the opening control of the flow control valve are performed based on the estimated hot water temperature.
Since the sensor output (actually measured hot water temperature) of the hot water supply heat exchanger hot water temperature sensor is not used and the estimated hot water temperature is used as described above,
For example, the hot-water supply heat exchanger hot-water temperature sensor fails and the detected hot-water temperature becomes a value far apart from the actual hot-water temperature, so that the opening / closing control of the bypass passage opening / closing valve and the opening control of the flow control valve cannot be accurately performed. Such a problem can be avoided.

A plurality of hot water supply heat exchanger hot water temperature sensors are provided at different locations on the hot water supply heat exchanger side, and the detected hot water temperatures of the plurality of hot water supply heat exchanger hot water temperature sensors are calculated and obtained. In the configuration in which the calculated value is used as the measured hot water temperature of the hot water supply heat exchanger, the average hot water temperature when the hot water temperature in the hot water supply heat exchanger is made uniform can be obtained. As described above, even when the temperature of the retained hot water on the hot water supply side of the hot water supply heat exchanger is likely to be uneven due to the additional heating of the hot water supply burner as in a water heater having a water configuration, the average of the hot water supply heat exchanger is also used. Since the hot water temperature can be obtained and the opening / closing control of the bypass passage opening / closing valve and the opening amount control of the flow rate control valve during standby for hot water supply are performed based on the average hot water temperature, the bypass passage opening / closing valve is caused by the temperature unevenness. Opening / closing control and flow control valve opening control It is possible to avoid the problem that the detected hot water temperature of the used hot water supply heat exchanger is significantly different from the temperature of hot water flowing out of the hot water supply heat exchanger at the time of hot water supply, and the hot water temperature at the time of hot water departs greatly from the set hot water supply temperature. .

A fixed bypass passage is provided for short-circuiting the downstream side of the bypass passage entrance side connection portion in the hot water supply heat exchanger and the upstream side of the flow control valve interposition position in the hot water supply passage. Is the connection of the feed water passage to the fixed bypass passage entrance side, and the incoming water branches into the hot water supply heat exchanger side and the fixed bypass passage side and flows in. Since the hot water and the water passing through the fixed bypass passage are mixed and flow out, for example, the temperature of the hot water in the hot water supply heat exchanger must be lowered by opening the bypass passage opening / closing valve and the water passing through the bypass passage. However, even if the bypass passage opening / closing valve fails and does not open, the water in the hot water supply heat exchanger is mixed with the water in the fixed bypass passage as described above. Since the hot water temperature is lowered by Rukoto can high-temperature hot water can cause serious problems, such as that would inflict burns to the user of the hot water and hot water is avoided.

[Brief description of the drawings]

FIG. 1 is a block diagram illustrating a main configuration of a control device that is characteristic in the first embodiment.

FIG. 2 is a flowchart showing an operation example of a hot water supply standby control unit shown in FIG. 1;

FIG. 3 is a block diagram showing a main configuration of a control device which is characteristic in the second embodiment.

FIG. 4 is a block diagram showing a main configuration of a characteristic control device in a third embodiment.

FIG. 5 is a block diagram showing a main configuration of a control device characteristic of a fifth embodiment.

FIG. 6 is a graph showing an example of a temporal change in the temperature of staying hot water in the hot water supply heat exchanger.

FIG. 7 is a model diagram showing an example of a system configuration of a water heater that is a combustion device of the present invention.

FIG. 8 is a model diagram showing one system configuration example of a combined water heater that is a combustion device of the present invention.

FIG. 9 is a model diagram showing an example of a system configuration of a water heater with a hot water filling function (high-temperature hot water supply function), which is a combustion device of the present invention.

FIG. 10 is a model diagram showing an example of a system configuration of a water heater having a one-can-two-water configuration, which is a combustion device of the present invention.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 Hot water supply heat exchanger 3 Water supply passage 4 Hot water supply passage 5 Fixed bypass 7 V ₁ valve 8 Bypass passage 10 V ₂ valve 13 Incoming water temperature sensor 14, 14a-14c Hot water heat exchanger hot water temperature sensor 36 T _{2 cal} detecting part 37 V ₂ opening and closing operation determination unit 38 V ₁ opening amount control unit 40 data storage unit 42 estimates T ₂ detecting section 43 time measurement means 44 target flow rate ratio calculator 45 T ₂ calculator

 ────────────────────────────────────────────────── ─── Continued on the front page (72) Inventor Masato Kondo 3-4 Fukamidai, Yamato-shi, Kanagawa Pref.

Claims (8)

[Claims] 1. A hot water supply heat exchanger that heats water guided from a water supply passage by using heat of combustion of a hot water supply burner and flows out to the hot water supply passage, and a bypass passage that short-circuits an input side and an output side of the hot water supply heat exchanger. A bypass passage opening / closing valve for opening and closing the bypass passage; a flow control valve provided in the hot water supply passage upstream of the bypass passage outlet connection portion to control a flow rate by a valve opening amount; and a temperature of water in the water supply passage. An inlet water temperature sensor for detecting
In a combustion apparatus having a hot water supply heat exchanger hot water temperature sensor for detecting hot water temperature of hot water supply heat exchanger and hot water supply temperature setting means for setting hot water supply temperature, after the hot water supply burner of hot water supply burner is stopped, A target hot water temperature of the hot water supply heat exchanger at which the next hot water temperature becomes the hot water supply set temperature based on the predetermined flow ratio of the hot water supply heat exchanger to the incoming water flow rate, the detected incoming water temperature, and the hot water supply set temperature is determined. A hot water supply heat exchanger target hot water temperature detection unit; comparing the target hot water temperature with the measured hot water temperature of the hot water supply heat exchanger hot water sensor, and setting the measured hot water temperature of the hot water supply heat exchanger in advance from the target hot water temperature; A bypass passage opening / closing valve opening / closing operation judging section that outputs an opening signal to the bypass passage opening / closing valve when it is determined to be higher than Measured hot water temperature and incoming water temperature Based on the detected incoming water temperature and the set hot water supply temperature, the flow ratio of the hot water supply heat exchanger to the total incoming water flow for the outlet hot water temperature to reach the set hot water supply temperature is obtained, and the bypass passage opening / closing valve opening / closing operation determination section determines the bypass passage opening / closing valve And a flow control valve opening amount control unit for controlling the opening amount of the flow control valve so that the detected flow ratio is obtained when the opening signal is output to prepare for the next tapping. Combustion equipment. 2. A hot water supply heat exchanger that heats water guided from a water supply passage by using heat of combustion of a hot water supply burner and flows out to the hot water supply passage, and a bypass passage that short-circuits an inlet and an outlet of the hot water supply heat exchanger. A bypass passage opening / closing valve for opening and closing the bypass passage; a flow control valve provided in the hot water supply passage upstream of the bypass passage outlet connection portion to control a flow rate by a valve opening amount; and a temperature of water in the water supply passage. An inlet water temperature sensor for detecting
In a combustion apparatus having a hot water temperature setting means for setting a hot water temperature, after the hot water combustion of the hot water burner is stopped, a predetermined flow rate ratio of the hot water heat exchanger to the total incoming water flow rate, and a detected incoming water temperature, A hot-water supply heat exchanger target hot-water temperature detector for obtaining a target hot-water temperature of the hot-water supply heat exchanger at which the next hot-water temperature becomes the hot-water supply set temperature based on the hot water supply set temperature; A data storage unit for storing the temperature data of the hot water in the hot water supply heat exchanger that changes with time of the temperature of the hot water in the heat exchanger; each time the hot water supply burner of the hot water supply burner stops, the elapsed time from the stop is measured. A time measuring means; a hot water supply heat exchanger estimated hot water temperature detecting section for estimating and detecting a hot water temperature of the hot water supply heat exchanger based on the hot water heat exchanger stagnant hot water temperature characteristic data in accordance with a time measured by the time measuring means;
Compare the detected target hot water temperature of the hot water supply heat exchanger target hot water temperature detection unit and the estimated hot water temperature of the hot water supply heat exchanger estimated hot water temperature detection unit, and set the estimated hot water temperature to a setting range given in advance from the target hot water temperature. A bypass passage opening / closing valve opening / closing operation judging unit for outputting an opening signal to the bypass passage opening / closing valve when it is judged to be too high, and outputting a closing signal to the bypass passage opening / closing valve otherwise; The flow rate of the hot water supply heat exchanger to the total flow rate of incoming water for the outlet water temperature to reach the hot water supply setting temperature is determined based on the hot water temperature and the detection temperature of the hot water supply temperature sensor and the hot water supply set temperature, and a bypass passage opening / closing valve open / close operation determination unit A flow control valve opening amount control unit that controls the opening amount of the flow control valve so that the detected flow ratio is obtained when an opening signal is output from the control unit to the bypass passage opening / closing valve; With a configuration to provide Combustion equipment according to claim. 3. A hot water supply heat exchanger that heats water guided from a water supply passage using heat of combustion of a hot water supply burner and flows out to the hot water supply passage, and a bypass passage that short-circuits an inlet and an outlet of the hot water supply heat exchanger. A bypass passage opening / closing valve for opening and closing the bypass passage; a flow control valve provided in the hot water supply passage upstream of the bypass passage outlet connection portion to control a flow rate by a valve opening amount; and a temperature of water in the water supply passage. An inlet water temperature sensor for detecting
In a combustion apparatus having a hot water supply heat exchanger hot water temperature sensor for detecting hot water temperature of hot water supply heat exchanger and hot water supply temperature setting means for setting hot water supply temperature, after the hot water supply burner of hot water supply burner is stopped, A target hot water temperature of the hot water supply heat exchanger at which the next hot water temperature becomes the hot water supply set temperature based on the predetermined flow ratio of the hot water supply heat exchanger to the incoming water flow rate, the detected incoming water temperature, and the hot water supply set temperature is determined. A hot water supply heat exchanger target hot water temperature detection unit; comparing the target hot water temperature with the measured hot water temperature of the hot water supply heat exchanger hot water sensor, and setting the measured hot water temperature of the hot water supply heat exchanger in advance from the target hot water temperature; A bypass passage opening / closing valve opening / closing operation judging section which outputs an opening signal to the bypass passage opening / closing valve when it is judged to be higher than the threshold value, and outputs a closing signal to the bypass passage opening / closing valve otherwise; Salary after stop A data storage unit for storing the temperature data of the hot water in the hot water supply heat exchanger that changes with time of the temperature of the hot water in the heat exchanger; each time the hot water supply burner of the hot water supply burner stops, the elapsed time from the stop is measured. Time measuring means;
A hot water supply heat exchanger estimation hot water temperature detection section for estimating and detecting the hot water temperature of the hot water supply heat exchanger based on the residence hot water temperature characteristic data in accordance with the time measured by the time measuring means; The flow rate of the hot water supply heat exchanger to the total flow rate of incoming water for the outlet water temperature to reach the hot water supply setting temperature is determined based on the hot water temperature and the detection temperature of the hot water supply temperature sensor and the hot water supply set temperature, and a bypass passage opening / closing valve open / close operation determination unit A flow control valve opening amount control unit that controls the opening amount of the flow control valve so that the detected flow ratio is obtained when an opening signal is output from the control unit to the bypass passage opening / closing valve; A combustion device characterized by having a configuration provided with: 4. A hot water supply heat exchanger that heats water guided from a water supply passage by using heat of combustion of a hot water supply burner and flows out to the hot water supply passage, and a bypass passage that short-circuits an inlet and an outlet of the hot water supply heat exchanger. A bypass passage opening / closing valve for opening and closing the bypass passage; a flow control valve provided in the hot water supply passage upstream of the bypass passage outlet connection portion to control a flow rate by a valve opening amount; and a temperature of water in the water supply passage. An inlet water temperature sensor for detecting
In a combustion apparatus having a hot water supply heat exchanger hot water temperature sensor for detecting hot water temperature of hot water supply heat exchanger and hot water supply temperature setting means for setting hot water supply temperature, after the hot water supply burner of hot water supply burner is stopped, A target hot water temperature of the hot water supply heat exchanger at which the next hot water temperature becomes the hot water supply set temperature based on the predetermined flow ratio of the hot water supply heat exchanger to the incoming water flow rate, the detected incoming water temperature, and the hot water supply set temperature is determined. A hot water supply heat exchanger target hot water temperature detection section; a data storage section for storing the hot water temperature characteristic data of the hot water supply heat exchanger that changes with time of the temperature of the hot water in the hot water supply heat exchanger after the hot water supply burner stops the hot water supply combustion; Time measuring means for measuring an elapsed time from the time of stopping the hot water supply combustion of the hot water supply burner; and hot water supply heat exchange based on the staying hot water temperature characteristic data according to the measurement time of the time measuring means. Bowl hot water An estimated hot water supply heat exchanger estimated hot water temperature detection unit; a target hot water temperature detected by the hot water supply heat exchanger target hot water temperature detection unit and an estimated hot water temperature by the hot water supply heat exchanger estimated hot water temperature detection unit; A bypass passage that outputs an open signal to the bypass passage opening / closing valve when it is determined that the temperature is higher than the target hot water temperature by exceeding a predetermined set range, and otherwise outputs a close signal to the bypass passage opening / closing valve. An opening / closing valve opening / closing operation determining unit; and a hot water supply heat exchanger for a total incoming flow rate so that the outgoing hot water temperature becomes the hot water supply set temperature based on the measured hot water temperature of the hot water supply heat exchanger and the detected incoming water temperature and the hot water supply set temperature. When the open signal to the bypass passage opening / closing valve is output from the bypass passage opening / closing valve determination section, the valve opening amount of the flow control valve is controlled so as to be the detected flow ratio. For the next hot spring Burning appliance, characterized in that the provided construction and the; a flow control valve opening amount control unit that. 5. A plurality of hot water supply heat exchanger hot water temperature sensors are provided at different locations on the hot water supply heat exchanger side, and the sum of the detected hot water temperatures of the plurality of hot water supply heat exchanger hot water temperature sensors is obtained. 4. A hot water supply heat exchanger hot water temperature calculating section for obtaining an integrated value obtained by multiplying a calculated value by a predetermined coefficient as an actual measured hot water temperature of the hot water supply heat exchanger. Item 4
The combustion device as described. 6. A plurality of hot water supply heat exchanger hot water temperature sensors are provided at different locations on the hot water supply heat exchanger side, and the detected hot water temperatures of the plurality of hot water supply heat exchanger hot water temperature sensors are predetermined coefficients, respectively. 5. A hot water supply heat exchanger hot water temperature calculation unit which multiplies the sum of the calculated values and sets the sum of the calculated values to the actually measured hot water temperature of the hot water supply heat exchanger. Combustion equipment. 7. A fixed bypass having no on-off valve for short-circuiting a downstream side of a bypass passage connecting portion in a water supply passage of a hot water supply heat exchanger and an upstream side of a flow control valve interposition position in a hot water supply passage of the hot water supply heat exchanger. The combustion device according to any one of claims 1 to 6, wherein a passage is provided. 8. A hot water supply heat exchanger that heats water guided from a water supply passage by using heat of combustion of a hot water supply burner and flows out to the hot water supply passage, and a bypass passage that short-circuits an inlet and an outlet of the hot water supply heat exchanger. A bypass passage opening / closing valve for opening and closing the bypass passage; a flow control valve provided in the hot water supply passage upstream of the bypass passage outlet connection portion to control a flow rate by a valve opening amount; and a temperature of water in the water supply passage. An inlet water temperature sensor for detecting
In a combustion apparatus having hot water temperature setting means for setting a hot water temperature, a downstream side of a bypass passage connection portion in a water supply passage of a hot water heat exchanger and a flow control valve interposition position in a hot water supply passage of the hot water heat exchanger are provided. A hot water supply heat exchanger hot water temperature information detecting means for detecting hot water temperature information of the hot water supply heat exchanger provided with a fixed bypass passage for short-circuiting the upstream side and a hot water supply heat exchanger; A flow ratio calculating unit for calculating a flow ratio of the hot water supply heat exchanger to a total incoming water flow amount for discharging hot water higher than the set hot water supply temperature by a predetermined set temperature based on the temperature; a flow rate of the hot water supply heat exchanger and a fixed bypass passage The flow ratio of the hot water supply heat exchanger to the total flow rate of the hot water supply is given in advance as a reference flow ratio, and this reference flow ratio is compared with the flow ratio calculated by the flow ratio calculation unit. When it is determined that the calculated flow ratio is lower than the reference flow ratio, an open signal to the bypass passage opening / closing valve is output, and at other times, a bypass passage opening / closing valve opening / closing operation determining unit that outputs a close signal to the bypass passage opening / closing valve is provided. ;
Based on the hot water temperature information of the hot water supply heat exchanger, the detected incoming water temperature, and the set hot water supply temperature, the flow ratio of the hot water supply heat exchanger to the total incoming water flow for the outlet hot water temperature to reach the hot water supply set temperature is obtained, and the bypass passage opening and closing valve is opened and closed A flow control valve opening amount control unit that controls an opening amount of the flow control valve so that the detected flow ratio is obtained when an opening signal is output from the operation determination unit to the bypass passage opening / closing valve; Combustion equipment characterized by the following.