JPH03286953A - Hot water feeder - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a water supply device that fully automatically supplies hot water to a bathtub.

[Prior Art] In recent years, hot water supply systems have been developed and put into practical use that can fully automatically supply hot water to hot water equipment installed in kitchens, bathrooms, etc. in ordinary homes by remote control using a remote control.

Conventionally, in this type of water heater, especially in a water heater for a bathtub in a bathroom, water from a water pipe, etc. is supplied into the can of the hot water heat exchanger of the water heater and heated to raise the temperature. The heated hot water is supplied from the circulation port of the bathtub via the hot water mixing valve, and when the hot water in the bathtub reaches a predetermined water level, the water level is detected by a water level sensor and the hot water supply is automatically stopped. It has the following configuration.

[Problems to be Solved by the Invention] However, in such conventionally structured water heaters, if the water level is not detected accurately, such as when the water level sensor malfunctions or the output fluctuates, the bathtub may be damaged. There was a problem in that the hot water was automatically supplied in an amount higher than the set water level, and there was a risk that the bathtub would overflow.

[Object of the Invention] An object of the present invention is to provide a hot water supply device that does not supply a large amount of hot water above a set water level into a bathtub.

[Means to achieve the purpose] In order to achieve the above-mentioned object, this invention.

Water is supplied from the water supply piping system into the can of the water heater, and hot water, heated and heated through heat exchange within the can, is automatically supplied from the circulation port of the bathtub to a predetermined set water level via the hot water supply piping system. In the hot water supply device, there is provided a water supply water level setting adjustment means for setting a set water level in the bathtub, and hot water supplied based on the set water level set by the hot water supply water level setting adjustment means is equal to or higher than the water level of the circulation port in the bathtub. a water level detection means for detecting and confirming whether the water level has reached the water level, a water level detection means for detecting the water level confirmed by the water level detection means, and a comparison of the water level detected by the water level detection means with the set water level. The water supply stop means determines whether or not the value is an abnormal value, and automatically stops the hot water supply when the value is abnormal.

[Function] That is, in the present invention, the set water level in the bathtub is set by the hot water supply water level setting adjustment means, and the hot water supplied based on the set water level set by the hot water supply water level setting adjustment means is set in the bathtub. The remaining hot water detection means detects and confirms whether or not the water level has reached the level of the circulation port or higher, and the water level detected by the remaining hot water detection means is detected by the water level detection means. The system compares the water level with the set water level to determine whether it is an abnormal value, and automatically stops hot water supply when the water level is abnormal. Hot water supply is stopped, thereby reliably preventing automatic hot water supply of a large amount of hot water.

[Example] Hereinafter, the present invention will be described in detail with reference to an illustrated example.

FIG. 1 schematically shows a hot water supply control system in a hot water storage type water heater according to the present invention, and numeral 1 in the figure is a water heater.

In the can body 2 of the hot water heat exchanger (not shown) of this water heater 1, water C-W from a water supply piping system 3 connected to a water pipe (not shown) is passed through a pressure reducing valve 4. Water is supplied to the tank and heated to a raised temperature.

5 in the figure indicates hot water H heated and heated by the water heater 1.
This main hot water supply piping system 5 is a main hot water supply piping system that supplies hot water to the water. It is branched into a second hot water supply piping system 7 to the circulation port 101,
This second hot water supply piping system 7 is connected to the hot water supply port side of the hot water mixing valve 8 .

The water supply piping system 3 is connected to the water supply port side of the hot water mixing valve 8.
A branch pipe 3a is connected thereto, and a solenoid valve 9 and first and second check valves 10 are connected to the hot water mixing outlet side.
A third hot water supply piping system 12 is connected via 11.

This third hot water supply piping system 12 is connected via a circulation pump 13 to a circulation port 101 of a one-piece structure provided in a bathtub 100 in the bathroom, and supplies hot water mixed to a predetermined temperature with the mixing valve 8 to the bathtub. It is designed so that hot water can be supplied within 100 yen.

Further, in the figure, reference numeral 14 denotes a third three-way valve provided between the outlet side of the second check valve 11 of the third hot water supply piping system 12 and the inlet side of the circulation pump 3.

Each valve port of the first three-way valve 14 has an outlet side of the second check valve 11, an inlet side of the circulation pump 13, and an inlet side of the water heater 1.
The reheating heat exchanger 15 provided therein is connected to the inlet 16 side, so that the third hot water supply piping system 12 constitutes an inlet circulation route.

The return lo 17 side of this reheating heat exchanger 15 is as follows.

A reheating piping system 1 that constitutes a return circulation path of a circulation port 101 with a one-piece structure for supplying hot water into a bathtub 100 in a bathroom.
8 is connected, and this reheating piping system 18
A thermistor 19 as means for detecting the temperature of water in the bathtub and a pressure sensor 20 as means for detecting the water level in the bathtub are installed in order from the bathtub 100 side to the upstream side and to the downstream side.

Reference numeral 21 in FIG. 1 is a second three-way valve provided between the return hole 17 side of the reheating heat exchanger 15 and the downstream side of the pressure sensor 20 of the reheating piping system 18.

A fourth hot water supply piping system 22 branched from the outlet side of the second check valve 11 is connected to each valve port of the second three-way valve 21 .
The downstream side of the reheating piping system 18 and the return side 17 of the reheating heat exchanger 15 are connected to each other.

Therefore, the reheating circulation path formed in this way is for reheating the hot water supplied in the bathtub 100 to the water heater 1 via the reheating piping system 18 from the return port of the single-portion circulation port 101. The hot water introduced into the heat exchanger 15 and heat-exchanged by the reheating heat exchanger 15 is sent to the bathtub 10 from the outlet of the circulation port 101 via the hot water piping system 12.
It is formed by @ ring inside 0.

In addition, 23 in the figure is a vacuum breaker provided in the first hot water supply piping system 6 to the kitchen, washroom, etc.

That is, the water heater according to the present invention opens the solenoid valve 9 and switches the first three-way valve 14 to open the second check valve 11.
When hot water is supplied into the bathtub 100, communication between the outlet side of the hot water supply piping system 12 and the third hot water supply piping system 12, and communication between the fourth hot water supply piping system 22 and the reheating piping system 18 by switching the second three-way valve 21 is achieved. priming hot water supply (water level L0), initial hot water supply to the vicinity of the upper side of the circulation port 101 (water level L1), and after detection of this initial hot water supply water level L1, the circulation port hot water supply for a water level corresponding to the water level (water level), and Set water level Ls according to the size of the bathtub
The estimated hot water supply (water level) up to the vicinity is the flow of the third hot water piping system 12 in the two-circuit water heater 1 consisting of the reheating circulation path of the hot water supply circuit and the reheating circuit @ ring seam route, It exhibits a first piping mode A (see FIG. 2) that is possible from both the return circulation path of the reheating piping system 18 (both-side hot water supply).

In addition, communication between the outlet side of the second check valve 1 and the third hot water supply piping system 12 by opening the electromagnetic valve 9 and switching the first three-way valve 14 , and opening the second three-way valve 21 . By shutting off the reheating piping system 18 and the fourth hot water supply piping system 22 by switching, hot water is supplied from the expected hot water supply water level in the bathtub 100 to the set water level Ls. A second piping mode B (see FIG. 3) is realized in which hot water is supplied on one side using only the hot water supply piping system 12.

Further, by closing the electromagnetic valve 9 and switching the first three-way valve 14, the outlet side of the second check valve 11 and the third hot water supply piping system 12 are communicated with each other, and the second three-way valve 21 is switched. By driving the circulation pump 13 while the fourth hot water supply piping system 22 and the reheating piping system 18 are in communication with each other due to switching, the initial hot water supply water level L1 is determined by the residual hot water detected by the pressure sensor 20.
and Detection of circulation port hot water supply water level L2 1. A third piping mode C (see FIG. 4) is exhibited, which allows air to be removed from the hot water supply piping system on both sides, and the temperature of hot water in the bathtub can be detected by the thermistor 19. .

In addition, by closing the electromagnetic valve 9 and switching the first three-way valve upper 4, the return lo 16 side of the reheating heat exchanger 5 and the third
In the reheating circulation path in communication with the hot water supply piping system 12 and the communication between the return lo 17 side of the reheating heat exchanger 15 and the reheating piping system 18 by switching the second three-way valve 2, the circulation By driving the pump 13, a fourth piping mode D (see Fig. 5) is provided, which allows air to be removed from the reheating circulation path and reheating control by switching operation of the kitchen remote control 40, which will be described later. ing.

That is, if the air in the reheating piping system in such reheating piping mode D is not vented, the air in the reheating piping will expand due to heating due to combustion in the reheating heat exchanger 15, and as a result, the pressure sensor Since the output of the pressure sensor 20 fluctuates, the output of the pressure sensor 20 cannot be accurately measured during precision hot water supply.

In the figure, 30 is a main control panel built into the water heater 1, and 40 is a kitchen remote control connected to this main control panel 30.

This kitchen remote control 40 operates by operating the operation switch 41, the automatic hot water supply switch 42, the fully automatic switch 43, the hot water supply temperature adjustment knob 44, and the bath water temperature adjustment knob 45.
Operation, automatic hot water supply, fully automatic, hot water supply temperature, and bath water temperature can be controlled by remote control.

On the other hand, the main control panel 30 includes a trial run switch 31, a trial run display lamp 32 that displays the operating state of the trial run switch 31, and the size (capacity) of the bathtub 100, for example, 200Q, 250Q, 30C)Q and 350fl. A bathtub capacity switching means 33 consisting of a changeover switch or a changeover dial etc. that can be set in multiple stages depending on the range of water supply, hot water supply water level setting adjustment means 34 consisting of a dial etc. for setting and adjusting the set water level Ls, and this hot water supply water level A hot water level setting display lamp 35 is provided to display the synchronized state of the dial or the like of the setting adjustment means 34.

That is, the main control panel 30 is configured by performing a trial run of the water heater 1 after the installation of the water heater at the site and before actual operation, and setting the set water level Ls according to the size of the bathtub. , by switching the bathtub capacity switching means 33 or switching operation using the volume, etc.
! 2m! Select and set the size of the bathtub 100.

At this time.

Initial hot water supply amount corresponding to the water level L1 up to the vicinity of the circulation port, hot water supply amount up to the circulation port hot water supply water level L2 by hot water supply corresponding to the water level L1 up to the vicinity of the circulation port, and expected hot water supply to below the set water level Ls. If the size of the bathtub 100 is set, the amount of hot water supplied up to the water level L3 can be easily determined as the hot water supply time in one hour by the hot water supply method using the natural pressure of the hot water storage type via the pressure reducing valve 4.

Next, after filling the bathtub 100 with water to a desired set water level Ls, the test run switch 31 is turned on, and the test run display lamp 32 blinks. At this time, the piping system mode is
As shown in FIG. 2, the solenoid valve 9 is in an open state, the outlet side of the second check valve 11 and the third hot water supply piping system 12 are in communication,
The fourth hot water supply piping system 22 and the reheating piping system 18 exhibit a first piping mode A in which they each maintain a communicating state, and thereby priming hot water to the circulation pump 13 is performed.

In this state, after a predetermined period of time, the piping system mode will change to
As shown in FIG. 4, the solenoid valve 9 is closed and the second check valve 11 is closed.
Automatically switches to the third piping mode C in which the outlet side of the hot water supply piping system 12 and the third hot water supply piping system 12 maintain a communication state, and the fourth hot water supply piping system 22 and the reheating piping system 18 maintain a communication state, respectively. At the same time, the circulation pump 3 is activated.

The hot water supply piping systems on both sides will be vented.

In this way, when the priming hot water supply to the circulation pump 13 and the air bleeding from both side hot water supply piping systems are completed, the trial run display lamp 3
2 changes from a blinking state to a lighting state, and the bathtub 10 at that time
A water level within 0 is detected as the set water level Ls.

Next, in this state, when the dial of the water supply water level setting adjustment means 34 is turned to set it to synchronize with the set water level Ls, this synchronized state is indicated by the hot water supply water level setting display lamp 35.
is displayed by exhibiting a lighting state. in this case,
The hot water level setting display lamp 35 has a three-stage display lamp that is turned off when the adjusted position by the dial of the hot water level setting adjustment means 34 is lower than the set water level Ls, and flashes when the adjusted position is higher than the set water level Ls. It has a display form.

In addition, while the circulation pump 13 is being primed or air is being vented from the hot water supply piping system on both sides, even if the adjustment position by the dial of the hot water level setting adjustment means 34 is in synchronization with the set water level Ls, the hot water level The setting display lamp 35 is made not to light up, and thereby the Ii ring pump 13
A call to the water for a candy bath.

Or, it prevents incorrect water level setting during air bleeding from both hot water supply piping systems.

After the set water level Ls of the bathtub 100 is determined in this manner, full automatic control of normal hot water supply and reheating is performed according to the flowchart shown in FIG.

That is, as shown in FIG. 6, with the operation switch 4 of the kitchen remote controller 40 turned on, the automatic switch 42
Alternatively, when the fully automatic switch 43 is turned on, the piping system mode becomes the first piping mode A as shown in FIG.
Automatic hot water supply is started, priming hot water (water level raising) to the circulation pump 13 which has been stopped due to STI, and air bleeding from the third hot water supply piping system 12 is performed.

Next, after a predetermined period of time has elapsed, the piping system mode changes to the third piping mode C as shown in FIG.
is activated, and Sr1 determines whether there is any remaining hot water in the bathtub, that is, whether the water level has reached the vicinity of the circulation port 101 or not.

At this time, if it is determined that there is no remaining hot water in the bathtub, the piping system mode becomes the first piping mode A, and Sr1
After the initial hot water supply, the piping system mode becomes the third piping mode C as shown in FIG. 4, and residual hot water is detected at Sr1.

In addition, when there is no remaining hot water in the bathtub, that is, when the water level in the bathtub does not reach the vicinity of the circulation port even after the initial hot water supply is repeated several times (for example, three or more times), for example, the pressure sensor is malfunctioning or the water is drained. If you forget to tighten the stopper, etc.,
If the system determines that there is an abnormality, it will stop automatic hot water supply and output an abnormality signal.

If it is determined by Sr1 that the water level has reached the vicinity of the circulation port 101 (water level is low), then by Sr1,
In the first piping mode A as shown in Fig. 2, the water level L
The circulation port hot water is supplied in an amount corresponding to about 2 minutes (water level L2).

Furthermore, in the third piping mode C as shown in FIG. 4, residual hot water detection is performed once again in Sr1.

In this way, when it is determined that the water level has sufficiently reached the vicinity of the circulation port 101 at Sr1, the circulation port hot water supply water level L2 is detected by the pressure sensor 20 at Sr1, and at this time, the circulation port hot water supply water level L2 and the set water level Ls are converted into voltage and compared, and if the difference (Ls - L-) is smaller than the predetermined set value, that is, the water level L2 due to the circulation port hot water supply at Sr1 is the expected hot water supply water level. , if it has not reached , the first piping mode A as shown in the second @
As a result, prospective hot water supply by double-sided hot water supply is performed at Sr1. This prospective hot water supply is performed by supplying an amount of hot water corresponding to the water level difference between the set water level Ls and the water level at the end of the prospective hot water supply.

When it is determined in Sr1 that the water level in the bathtub is higher than a predetermined set value and that it has reached the expected hot water supply level L3, the piping system mode is changed to the fourth piping as shown in FIG. The mode is set to D, and the circulation pump 13 is driven by Sr1 to bleed air from the reheating heat exchanger 15 and the reheating piping system 18, and then the water level L3 at the expected end of hot water supply is detected at 5TIO.

If the expected water level at the end of hot water supply detected by this STI O is smaller than the set water level Ls, the circulation pump 1
3, and change the piping system mode to 2 as shown in Figure 3.
By setting piping mode B to 5TII, hot water is supplied on one side only by the third hot water supply piping system 12, and hot water is precisely supplied.

In this way, at 5TII, hot water is supplied on one side only by the third hot water supply piping system 12, and when it is determined at 5T10 that the expected water level at the end of hot water supply is greater than the set water level Ls, the hot water supply is stopped, Move to 5T12 without performing precision hot water supply using 5TII. At this time, from 5TIO to 5T
12, it is determined whether the estimated water level L□ at the end of hot water supply is abnormally larger than the set water level Ls, that is, whether it is an abnormal value that would cause the bathtub to overflow. If there is, it will transition to an alarm and issue a warning.

By the way, when it is determined in Sr1 that there is hot water remaining in the bathtub, the process moves to Sr1.

Then, at 5T12, the piping system mode is set to the third piping mode C as shown in FIG. If the temperature is lower than the set temperature, the fourth piping mode D as shown in FIG. Exit and wait when .

[Effects of the Invention] As is clear from the above description, the present invention sets the set water level in the bathtub by the hot water supply water level setting adjustment means, and performs hot water supply based on the set water level set by the hot water supply water level setting adjustment means. Detecting and confirming whether or not the hot water reached above the water level of the circulation port in the bathtub using a residual hot water detection means;
The water level confirmed by this residual water detection means is detected by a water level detection means, and the water level detected by this water level detection means is compared with the set water level to determine whether or not it is an abnormal value. Since the system is designed to stop hot water supply, even if the water level detection means malfunctions, hot water supply will automatically stop when the set water level is reached. can be reliably prevented,
It has the excellent effect of not overflowing.

[Brief explanation of the drawing]

FIG. 1 is an explanatory diagram schematically showing the overall configuration of a bath water supply device according to the present invention, and FIG. 2 is an explanatory diagram similarly showing a first piping mode. FIG. 3 is an explanatory diagram similarly showing the second piping mode. FIG. 4 is an explanatory diagram similarly showing the third piping mode. FIG. 5 is an explanatory diagram similarly showing the fourth piping mode, and FIG. 6 is a flowchart similarly showing the hot water supply and reheating control state. 1... Water heater, 2... Can body. 3...Water supply piping system. 12 ・ ・ 20 ・ ・ 30 ・ 34 ・ ・ 100 ・ C-W ・ Ll ・ ・ L2 ・ ・ L, ・ ・ Ls ・ ・ Hot water piping system (outgoing circulation route), ・ Water level detection means (pressure sensor),・Main control panel.・Hot water water level setting adjustment means. ...Bathtub, 101...1i ring entrance, ...Water,
H-W...Hot water, ・Initial hot water supply level, ・Circulation port hot water supply level, ・Estimated hot water supply level.・Setting water level. -W

Claims (1)

[Claims] (1) Supply water from the water supply piping system into the can of the water heater,
In a hot water supply device that automatically supplies hot water heated and heated through heat exchange within the can from a circulation port of a bathtub to a predetermined set water level via a hot water supply piping system, the set water level in the bathtub is set. a hot water supply water level setting and adjusting means for detecting and confirming whether or not the hot water supplied based on the set water level set by the hot water supply water level setting and adjusting means has reached a level equal to or higher than the water level of the circulation port in the bathtub; a detection means; a water level detection means for detecting the water level confirmed by the remaining hot water detection means; and a water level detection means for detecting the water level confirmed by the remaining hot water detection means; A hot water supply device characterized in that it is sometimes equipped with a hot water supply stop means for automatically stopping hot water supply.