JPS6237637A - Hot-water supplier provided with additional heating function - Google Patents

Abstract

PURPOSE:To permit to rise the temperature of hot-water in a bathtub to a desired heat-up temperature of bath in a short period of time and supply the hot-water automatically by a method wherein a solenoid valve for additional heating is opened to burn a burner for additional heating simultaneously to obtain the combustion of large capacity in case a difference between the signal of thermistor for hot-water supply and the same of thermistor for additional heating has exceeded a hot-water supplying capacity. CONSTITUTION:When hot-water supplying capacity has been exceeded in case of low water temperature such as in winter or the like, the signal of the thermistor 18 for hot-water supply has become lower than an automatic hot-water supply set temperature and the difference between signals of both thermistors is large,the solenoid valve 15 for additional heating is opened to burn the burner 16 for additional heating simultaneously and obtain the combustion of large capacity. The proportional control valve 13 is operated by an output, operated and treated in a control circuit 27, so that the temperature of supplying hot-water, set in the bathtub hot-water temperature setter of a remote controller 28, is obtained while the amount of combustion of the burner 14 for hot-water supply and the burner 16 for additional heating is controlled so as to obtain a stable hot-water temperature, whereby the hot-water may be supplied automatically into the bathtub 4 after heating it to a disired heat-up temperature in a short period of time.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a water heater with a reheating function that automatically supplies hot water to a bathtub.

Conventional technology In recent years, water heaters with reheating function have been developed as composite products that connect the water heater and bathtub, and combine a follow-up device that circulates hot water with a pump, and have also added a function to automatically supply hot water to the bathtub. The automation of baths is progressing.

A conventional water heater with a reheating function will be described below with reference to the drawings. FIG. 2 shows a schematic diagram of the configuration of the conventional example.

1 is a hot water supply heat exchanger connected to a water supply port 1a and a hot water supply port 1b. It is connected to a hot water return port 2a and a hot water inlet 2b by a two-burner heat exchanger.

A pump 3 is provided in the hot water passage leading from the hot water return port 2 & to the reheating heat exchanger 2, and a bathtub 4 is connected to the hot water return port 2 & C5 and the hot water spout 2b with a connecting pipe 5 to form a hot water circulation path. do. An exhaust pipe 6 is connected to each of the heat exchangers 1.2, and the combustion exhaust gas is discharged to an exhaust port 8 by an exhaust fan 7. In addition, the combustion air is supplied to the air supply port 9.
It is formed into a part of the gauge so that it can be supplied from the ground. The fuel passage branches off from the original solenoid valve 11 and connects to the hot water supply solenoid valve 1.
2 and a proportional control valve 13 to a hot water supply burner 14, and a reheating solenoid valve 15 to a reheating burner 16, respectively.

Water supply detection element 1 that detects water supply in the water supply side passage and issues a signal
7, and a hot water supply thermistor 18 is provided at the outlet of the hot water supply heat exchanger 1.

A circulating water detection element 19 for detecting the circulation of hot water is provided in the hot water passage leading to the pump 3 and the reheating heat exchanger 2, and a reheating thermistor 20 is provided at the inlet of the reheating heat exchanger 2. . A hot water heater 21 is connected to the hot water supply port 1b through a hot water supply pipe 22 to, for example, a bathroom or kitchen, and an automatic hot water supply unit 23 having a hot water control valve 24, a hopper 25, and a water level sensor 26 for automatically supplying hot water to the bathtub is connected to the hot water supply pipe 22 to the bathroom or kitchen, for example. It is provided branching off from the piping 22 and connected to the bathtub 4.

Actuators (electromagnetic valves, pumps, etc.) are configured to be operated by a control circuit 27 and a remote controller 28 in response to signals from the various sensors described above.

Next, to explain the fiQ operation, when the hot water heater 21 is opened, the water supply detection element 17 is activated, the main solenoid valve 11, the hot water supply solenoid valve 12, and the proportional control valve 13 are opened, and the hot water supply burner 14 is opened. By the signal of the hot water supply thermistor 18,
Set the hot water temperature using the hot water temperature setting device (not shown) on the remote control 28.
The proportional control valve 13 is operated with the output calculated by the control circuit 27 so that the hot water supply temperature is set, and the combustion amount of the hot water supply burner 14 is controlled to stably control the hot water temperature. It is configured as follows.

On the other hand, by operating a follow-up switch (not particularly shown) provided on the remote controller 28, the pump 3 is operated and the water or hot water stored in the bathtub 4 is circulated, the circulating water detection element 19 is operated, and the The solenoid valve 11 and the reheating solenoid valve 15 are opened, and the reheating burner 16 is ignited.

The temperature of the circulating return water is sensed, and the temperature is set using a signal from the reheating tank 20 installed at the entrance of the reheating heat exchanger 2 and a bathtub water temperature setting device (not shown) on the remote controller 28. The control circuit 27 is operated to bring the bath to a boiling temperature,
The reheating solenoid valve 15 is operated to control the combustion amount of the reheating burner 16, thereby stably controlling the circulating hot water and controlling the bathtub water temperature.

Furthermore, when an automatic hot water supply switch (not shown) provided on the remote controller 28 is operated, the hot water supply control valve 24 of the automatic hot water supply unit 23 opens and the hot water temperature set by the hot water temperature setting device (not shown) on the remote controller 28 is opened. By operating the proportional control valve 13 with the output calculated by the control circuit 27 and controlling the combustion amount of the hot water supply burner 14 so that the hot water temperature becomes automatic, the hot water temperature is stably controlled. Automatic hot water supply to the bathtub 4 and automatic temperature control of the bathtub temperature are realized.

Problems to be Solved by the Invention However, in the above configuration, the automatic hot water supply unit 23 needs to be installed in the immediate vicinity of the bathtub 4, and due to the structure of the building, it is difficult to install it when the bathroom is located in the center of the room. However, even if it were possible to install it on the wall, it would be problematic in terms of the appearance and aesthetics of the building.

In view of the above-mentioned problems, the present F3A aims to provide an automatic hot water supply function at low cost, free of installation, and effective in terms of workability and aesthetics.

Means for Solving the Problems In order to solve the above-mentioned problems, the water heater with reheating function of the present invention has a hot water supply heat exchanger and a hot water circulation passage that is connected to a bathtub and circulates hot water using a pump. an exchanger, a proportional control valve connected in series to the main solenoid valve, and a solenoid valve for hot water supply connected to each of the hot water supply burner and rear burner connected to each of the heat exchangers by branching from the proportional control valve. and a reheating solenoid valve, a hot water supply thermistor provided at the outlet of the hot water supply heat exchanger, a reheating thermistor provided at the inlet of the reheating heat exchanger, and a hot water supply passage downstream of the hot water supply thermistor. An automatic hot water supply path for a bathtub having a hot water supply control valve that is branched and connected to the hot water circulation passage, and a control that opens the hot water supply control valve and performs arithmetic processing using signals from both the hot water supply thermistor and the reheating thermistor. Based on the signal, the proportional control valve is operated to control the combustion amount of the hot water supply burner, and if the difference between the signals of both thermistors exceeds the hot water supply capacity,
The solenoid valve for reheating is also opened, and the reheating burner No. 177 is simultaneously combusted to automatically supply hot water to the bathtub.

According to the above-described configuration, the present invention operates the proportional control valve with the output calculated by the control circuit based on the signal from the hot water supply thermistor during hot water supply operation to control the combustion amount of the hot water supply burner to stabilize the hot water temperature. In addition to being able to control
During follow-up operation, the proportional control valve is operated using the output calculated by the control circuit based on the signal from the reheating thermistor to control the combustion amount of the reheating burner, thereby stably controlling the bath water temperature.

In addition, during simultaneous operation, the control circuit operates the proportional control valve using the output computed in the hot water supply mode to stably control the hot water temperature, and the follow-up side uses the reheating thermistor signal to operate the rear-end electromagnetic valve. By controlling the opening and closing of the valve, the bathtub water temperature can be stably controlled.

Furthermore, during automatic hot water supply operation, by opening the hot water supply control valve, hot water is automatically supplied from the hot water supply heat exchanger to the reheating heat exchanger to the bathtub, and the temperature of the automatic hot water supply is determined by the hot water supply thermistor and the reheating thermistor. The proportional control valve is operated by the output calculated by the control circuit based on both signals, and the combustion amount of the hot water supply burner is controlled to bring the bath water temperature to the desired bath temperature and humidity, automatically supplying hot water without follow-up operation. It can be completed by just driving.

In addition, if the difference between the signals of both thermistors exceeds the hot water supply capacity, the solenoid valve for reheating is also opened and the burner for reheating is simultaneously combusted to achieve high capacity combustion, thereby reducing the bath water temperature. Water can be automatically supplied to the desired bath boiling temperature in a short time.

In addition, the number of parts can be reduced, the cost of the automatic hot water supply function can be reduced, and the purpose can be achieved by making it easy to install and improving aesthetics.

EXAMPLE An example of the present invention will be described below with reference to a schematic diagram of the configuration in FIG. Reference numeral 1 denotes a heat exchanger for hot water supply, which is connected to the water supply inlet 1a and the hot water supply inlet 1b, and has a water supply detection element (such as a water amount sensor that counts the amount of water) 17 that detects water supply and outputs a signal in the water supply side passage. 2 is a reheating heat exchanger connected to a hot water return port 2a and a hot water inlet 2b.

A pump 3 and a circulating water detection element 19 for detecting the circulation of hot water are provided in the hot water passage leading from the hot water return port 2a to the reheating heat exchanger 2, and a bathtub 4 is provided at the hot water return port 2a and the hot water spout 2b. They are connected by a connecting pipe 5 to form a hot water circulation passage.

An exhaust pipe 6 is connected to each of the heat exchangers 1 and 2, and an exhaust fan 7 discharges combustion exhaust gas to an exhaust port 8. Further, it is formed in a part of the r-space so that combustion air can be supplied from the air supply port 9.

The fuel passage connects the main solenoid valve 11 and the proportional control valve 13 in series, and branches from this to the hot water supply burner 14 through the hot water supply solenoid valve 12, and the reheating burner 16 through the rear collision solenoid valve 15. Branch connections are made so that the control valves 13 are connected in common.

The control circuit 27 performs arithmetic processing so that the hot water temperature is set by the signal from the hot water thermistor 18 provided at the outlet of the hot water heat exchanger 1 and the hot water temperature setting device (not shown) of the remote controller 28. operating the proportional control valve 13 with the output,
The combustion amount of the hot water supply burner 14 is controlled to stably control the temperature of C hot water.

On the other hand, so that the bath boiling temperature is set by the signal of the reheating thermistor 20 provided at the entrance of the reheating heat exchanger 2 and the bathtub water temperature setting device (not shown) of the remote controller 28,
The output calculated by the control circuit 27 is used to control the proportional control valve 1.
3 is operated to control the combustion amount of the reheating burner 16, thereby stably controlling the circulating hot water and controlling the bathtub water temperature.

In addition, in order to make the bath water temperature rise quickly, the proportional control valve 1
The combustion amount of the reheating burner 16 controlled in step 3 is controlled at the maximum capacity without proportional control until the bath boiling temperature is set by the bath water temperature setting device. , the control circuit 27 is configured to close the reheating solenoid valve 15. The hot water supply solenoid valve 12 and the reheating solenoid valve 15 are configured to open and close when controlling the respective hot water temperatures. In addition, during simultaneous operation, the proportional control valve 13 is operated with the output computed in the hot water supply mode preferentially by the control circuit 27 to stably control the hot water temperature, and the following side is controlled by the rear collision thermistor 20. By controlling the opening and closing of the reheating solenoid valve 15 using a signal, the bathtub water temperature is stably controlled. moreover,
During automatic hot water supply operation, the hot water supply control valve 24 is placed in the middle, with a reverse valve 29 downstream and a safety valve (vacuum breaker) 30 upstream.
An automatic hot water supply path for the bathtub is branched and connected from the hot water circulation path on the outlet side of the pump 3 and the hot water supply path downstream of the hot water supply thermistor 18. Then, by opening the hot water supply control valve 24, the hot water supply heat exchanger 1 and the RIJ reheat follow-up exchanger 2 are passed through, and the signals from both the hot water supply thermistor 18 and the rear impact thermistor 20 are used to generate the hot water supply control valve 24. The proportional control valve 13 is operated by the output calculated by the control circuit 27 to control the combustion amount of the hot water supply burner 14 to stably control the temperature of hot water and automatically supply hot water to the bathtub 4. It is.

Also, when the water temperature is low such as in winter, the hot water supply capacity is exceeded, and the signal of the hot water supply thermistor 18 becomes lower than the automatic hot water supply setting temperature, and the difference between the signals of both thermistors is large (exceeds the hot water supply capacity). In this case, the reheating solenoid valve 15 is also opened and the reheating burner 16 is simultaneously combusted to achieve high capacity combustion, thereby bringing the bath water temperature to the desired bath boiling temperature in a short time. It is configured to automatically supply hot water.

To explain the operation of the above embodiment, when the hot water heater 21 in a bathroom or kitchen, for example, is opened through the hot water supply pipe 22 connected to the hot water supply port 1b, the water supply detection element 17 detects water supply and the hot water supply operation sequence is activated. The exhaust fan 7 rotates. The main solenoid valve 11, the hot water supply solenoid valve 12, and the proportional control valve 13 are opened to keep the fuel ignited.

(The ignition holding means is not particularly shown) Then, the hot water supply heat exchanger 1 is heated by combustion of the hot water supply burner 14, and hot water is discharged from the hot water heater 21 through the hot water supply port 1b.

The hot water temperature is detected by the hot water supply thermistor 18, and the output calculated by the control circuit 27 is used to make the proportional By operating the control valve 13, the hot water supply burner 1
The combustion amount of step 4 is controlled to stably control the hot water temperature.

On the other hand, by operating a follow-up operation switch (not particularly shown) provided on the remote control 28, the pump 3 and the exhaust fan 7 are operated.
rotates.

When the hot water or water previously stored in the bathtub 4 is circulated by the pump 3, the circulating water detection element 19 detects it and the follow-up operation Siegen is activated. The valve 15 and the proportional control valve 13 are opened to keep the fuel ignited. (The ignition holding means is not particularly shown.) The reheating burner 15 burns, heating the reheating heat exchanger 2, and the hot water is circulated in the bathtub 4 from the hot water spout 2b through the connecting pipe 5. Hot water is circulated through the return port 2a. The control circuit 27 reheats circulating hot water equal to the water temperature in the bathtub 4 so that the bath boiling temperature is set by the signal from the MISK 20 and the bathtub water temperature setting device (not shown) on the remote control 28. The proportional control valve 13 is operated with the output calculated by the above, and the combustion amount of the reheating burner 16 is controlled,
The temperature of the bathtub water is controlled by stably controlling the circulating hot water.

In addition, in order to make the bath water temperature rise quickly, the proportional control valve 1
The combustion amount of the reheating burner 16 controlled in step 3 is controlled at the maximum capacity without proportional control until the bath boiling temperature is set by the bathtub water temperature setting device. The combustion solenoid valve 15 is closed.

Furthermore, when the automatic hot water supply operation switch provided on the remote controller 28 is operated, the hot water supply control valve 24 is opened and the hot water is automatically supplied from the hot water spout 2b to the bathtub 4 through the hot water supply heat exchanger 1 and the reheating heat exchanger 2. Hot water is supplied.

The water supply detection element 17 is configured to detect the water supply and operate an automatic hot water supply operation sequence, and the exhaust fan 7 rotates. At that time, pump 3 is not rotated.

The main solenoid valve 11, the hot water supply solenoid valve 12, and the proportional control valve 13 are opened to keep the fuel ignited. (The ignition holding means is not particularly shown) Then, the hot water supply heat exchanger 1 is heated by the combustion of the hot water supply burner 14, and hot water is automatically supplied from the hot water spout 2b to the bathtub 4 through the reheating heat exchanger 2. reactor.

The hot water supply temperature is detected by both the hot water supply thermistor 18 and the rear collision thermistor 20, and is processed by the control circuit 27 so that the hot water temperature is set by the bathtub hot water temperature setting device (not shown) of the remote control 28. The proportional control valve 13 is operated with the output to control the combustion amount of the hot water supply burner 14 to stably control the temperature of hot water and automatically supply hot water to the bathtub 4.

In this way, the combustion amount of the hot water supply burner 14 is controlled by the signal from the rear-end thermistor 20. Even if the hot water supply thermistor 18 and the rear-heating thermistor 20 have the same specifications, the characteristics may vary due to component variations. The set temperature of the hot water supply thermistor 18 may be higher or lower, and the desired bath boiling temperature may not be achieved as set by the bath water temperature setting device. This is because by controlling the combustion amount of the bath burner 14, it is possible to reliably reach the desired bath boiling temperature set by the bathtub water temperature setting device.

By doing so, it is possible to complete the automatic hot water supply operation only without following the desired bath boiling temperature.

At this time, since the pump 3 is not rotating, the hot water heated by the hot water supply heat exchanger 1 is automatically supplied from the hot water spout 2b to the bathtub 4 through the reheating heat exchanger 2, so the signal from the rear collision thermistor 2o is The amount of combustion of the hot water supply burner 14 can be controlled by.

In addition, when the water temperature is low such as in winter, the hot water supply capacity is exceeded and the signal of the hot water supply thermistor 18 becomes lower than the automatic hot water supply setting temperature, and if the difference between the signals of both thermistors is large, the reheating is performed. By opening the solenoid valve 15 and simultaneously burning the reheating burner 16 at a high capacity, the hot water temperature reaches the temperature set by the bathtub hot water temperature setting device (not shown) of the remote control 28. The proportional control valve 13 is operated with the output calculated by the control circuit 27 so that the hot water supply burner 14 and the reheating burner 16 are operated.
By controlling the amount of combustion of water and stably controlling the temperature of hot water, it is possible to automatically supply hot water to the bathtub 4 up to the desired bath boiling temperature in a short time.

The amount of hot water supplied to the bathtub 4 uses a water amount sensor that counts the amount of water supplied to the water supply detection element 17, so the amount of ignition/extinguishing water is detected, and the amount of automatic hot water supply is calculated and measured by the control circuit 27 during automatic hot water supply operation. automatically closes the hot water supply control valve 24.
Automatic hot water supply can be stopped by closing the valve.

The check valve 29 and the safety valve (vacuum breaker) 30 are used to prevent hot water from flowing back into the hot water supply passage when the pump 3 rotates during follow-up operation.

Effects of the Invention As described above, the present invention provides a heat exchanger for hot water supply, a reheating heat exchanger for a hot water circulation passage connected to a bathtub, and circulating hot water using a pump, and a proportional control valve connected in series to the original solenoid valve. A hot water supply solenoid valve and a reheating solenoid valve branched from the proportional control valve and connected to each of the hot water supply burner and reheating burner facing each of the heat exchangers, and the hot water supply heat exchanger. A thermistor for hot water supply provided at the outlet and a heat exchanger for reheating are installed at the inlet of the heat exchanger for reheating. A bathtub automatic hot water supply path having a control valve and a control signal that opens the hot water supply control valve and is calculated using signals from both the hot water supply thermistor and the rear collision thermistor operate the proportional control valve to supply the hot water. In addition to controlling the combustion amount of the bathtub burner, if the signal difference between the two thermistors exceeds the hot water supply capacity, the reheating solenoid valve is also opened and the reheating burner is simultaneously combusted to automatically supply hot water to the bathtub. By configuring the system to supply hot water, the following effects can be achieved.

(1) In both hot water supply and follow-up, a single proportional control valve proportionally controls the combustion amount to control the hot water temperature, making it possible to stabilize the hot water temperature.

(2) In particular, since the bath water temperature can be controlled by proportional control of the bath water temperature, energy savings can be achieved compared to conventional hot water temperature control using Hi-Lo-OFF or ON-0FF control.

(3) Since the automatic hot water supply function is built into the main body, the cost can be reduced, installation is free, and construction workability can be improved, and the appearance of the building is not impaired.

(4) By using the water supply detection element as a water flow sensor that counts the amount of water supplied, the amount of hot water supplied to the bathtub can be arbitrarily set and stopped automatically during automatic hot water supply, and the amount of water used for ignition and extinguishing can be changed from conventional methods. There is no need for a water level sensor to detect the water level in the bathtub other than the sensor that detects the water level in the bathtub.

(5) Automatic hot water supply to the bathtub uses a connecting pipe for hot water circulation, so there is no need for hot water piping for automatic hot water supply, and construction costs can be reduced.

(+5) Since hot water can be supplied automatically while the bathtub lid is closed, there is no leakage of hot water, which saves energy and is economical.

(7) It is possible to complete the process only by automatic hot water supply operation without following the desired bath temperature, and as there is no need for follow-up operation after automatic hot water supply as in conventional methods, the bath boiling time is shortened. This allows you to live an economically comfortable bath life.

(υ When the water temperature is low, such as in winter, the hot water supply capacity is exceeded and the signal of the hot water supply thermistor becomes lower than the automatic hot water supply setting temperature, and if the difference between the signals of both thermistors exceeds the hot water supply capacity, reheating is performed. By opening the solenoid valve for reheating and burning the reheating burner at the same time, burning at high capacity,
To automatically supply hot water in a bathtub to the desired bath boiling temperature in a short time.

[Brief explanation of the drawing]

FIG. 1 is a schematic diagram showing the configuration of an embodiment of the present invention, and FIG. 2 is a schematic diagram of the configuration of a conventional example. 1... Heat exchanger for hot water supply, 2... Heat exchanger for reheating, 3... Pump, 4... Bathtub, 11... ... Original solenoid valve, 12 ... Solenoid valve for hot water supply, 13 ... Proportional control valve, 14 ...
・Burner for hot water supply, 15...Solenoid valve for reheating, 16
... Burner for reheating, 17 ... Water supply detection element, 18 ... Hot water supply thermistor, 19 ...
... Circulating water detection element, 20 ... Reheating thermistor, 24 ... Hot water supply control valve. Name of agent: Patent attorney Toshio Nakao and 1 other person1-
Hot water supply J @ heat exchange! 14-6 hot water bar ±3024-
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Claims (1)

[Claims] A heat exchanger for hot water supply, a heat exchanger for reheating the hot water circulation passage connected to the bathtub and circulating hot water using a pump, a proportional control valve connected in series to the original solenoid valve, and a hot water supply system connected to each heat exchanger. a hot water supply solenoid valve and a reheating solenoid valve branched from the proportional control valve and connected to each of the reheating burner and the reheating burner;
A hot water supply thermistor provided at the outlet of the hot water supply heat exchanger, a reheating thermistor provided at the inlet of the reheating heat exchanger, and a hot water supply passage downstream of the hot water supply thermistor,
and an automatic hot water supply path having a hot water supply control valve connected to the hot water circulation passage, and a control signal that opens the hot water supply control valve and is calculated using signals from both the hot water supply thermistor and the reheating thermistor, The proportional control valve is operated to control the combustion amount of the hot water supply burner, and when the difference between the signals of both thermistors exceeds the hot water supply capacity, the reheating solenoid valve is also opened to control the amount of combustion of the hot water supply burner. A water heater with an additional heating function configured to automatically supply hot water to a bathtub by simultaneously burning a combustion burner.