JPS6266053A - Hot water supplier with additional burning function - Google Patents

Abstract

PURPOSE:To provide a hot water supplier in which an automatic hot water supply function is provided at low cost and freely installed, and which is effective in its installation work and appearance, by automatically supplying hot water from a heat exchanger for supplying hot water to a bathtub via an automatic hot water passage leading to the bathtub, computing the hot water temperature with a signal from a thermistor for supplying hot water in a control circuit, actuating a proportional control valve by thus obtained output thereby to control the combustion amount of the burner for supplying hot water. CONSTITUTION:The automatic hot water supply to a bathtub 4 is carried out in the following manner. That is, supply water is detected by a supply water detection element 17, a control circuit 27 operates and an exhaust fan 7 rotates. A supply hot water burner 14 burns and a heat exchanger 1 for supplying hot water is heated, and hot water is automatically supplied to the bathtub via a supply hot water amount control valve 24 and an automatic water supply passage 30 to the bathtub. the temperature of supply hot water is detected by a thermistor 18 for supply hot water. Then, a difference between the detection signal and a supply hot water temperature set by an automatic supply hot water temperature setter of a remote controller 28, id detected. A proportional control valve 13 is actuated by the output computed in a control circuit 27 so that the hot water temperature becomes, a set supply hot water temperature thereby to control the combustion amount of the burner 14 for supply hot water to stably control the supply hot water temperature to automatically supply hot water to the bathtub 4.

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, a combination product has been developed as a water heater with a reheating function, which connects the water heater and a bathtub and combines a reheating device that circulates hot water with a pump, and also has 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. 2 is a reheating heat exchanger connected to a hot water return port 2a and a hot water inlet 2b.

A pump 3 is 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 connected to the hot water return port 2a and the hot water inlet 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. Moreover, it is formed in a part of the cake so that combustion air can be supplied from the air supply port 9. The fuel passage branches off from the main solenoid valve 11, connects to the hot water supply burner 14 through the hot water supply solenoid valve 12 and the proportional control valve 13, and connects to the reheating burner 16 through the reheating solenoid valve 15. ing. A water supply detection element 17 for detecting water supply and outputting a signal is provided in the water supply side passage, and a hot water supply therminutor 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 installed at the inlet of the reheating heat exchanger 2!
il-provide.

A hot water supply pipe 22 connects the hot water heater 21 to a bathroom or kitchen, for example.
The entire system is connected to the hot water supply port 1b, and an automatic hot water supply unit 23 having a hot water supply control valve 24, a hopper 25, and a water level sensor 26 for automatically supplying hot water to the bathtub is branched from the hot water supply piping 22 and connected to the bathtub 4. do.

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 operation, when the 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 1 is opened.
4 is ignited, and according to the signal from the hot water supply thermistor 18, the output is calculated and processed by the control circuit 27 so that the hot water temperature reaches the hot water temperature set by the hot water temperature setting device (not shown) of the remote control 28. The proportional control valve 13 is operated to control the combustion amount of the hot water supply burner 14 to stably control the temperature of hot water.

On the other hand, a reheat switch (not particularly shown) 'f provided on the remote control 28: When operated, the pump 3 is operated, the water or hot water stored in the bathtub 4 is circulated, and the circulating water detection element 19 is activated. Then, the main 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 the signal from the reheating thermistor 20 installed at the entrance of the reheating heat exchanger 2 and the bathtub water temperature setting device (not shown) on the remote controller 28. Operate control circuit 2 to bring it to 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. The proportional control valve 13f uses the output calculated by the control circuit 27 so that the automatic hot water supply temperature is achieved.
By fully controlling the combustion amount of the hot water supply burner 14 and stably controlling the temperature of hot water, automatic hot water supply to the bathtub 4 and automatic temperature control of the bathtub temperature are fully 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. In addition to being impossible to install, even if it were possible to install it on the wall, there were problems such as problems with the appearance and aesthetics of the building.

In view of the above-mentioned problems, the present invention aims to provide an automatic hot water supply function that is inexpensive, easy to install, easy to install, and effective.

Means and Description for Solving the Problems In order to solve the problems, the water heater with reheating function of the present invention has a heat exchanger for hot water supply, and a reheating function in a hot water circulation passage that is connected to a bathtub and circulates hot water using a pump. a proportional control valve connected in series to the main solenoid valve, and a hot water supply solenoid branched from the proportional control valve and connected to each of the hot water supply burner and reheating burner that heat each of the heat exchangers. A reheating solenoid valve and a reheating solenoid valve, a hot water supply thermistor provided at the outlet of the hot water supply heat exchanger to detect the hot water temperature, and a reheating thermistor provided at the inlet of the reheating heat exchanger to detect the hot water temperature. , a bathtub automatic hot water supply passage that branches from the hot water supply passage downstream of the hot water supply thermistor and connects to the bathtub and has a hot water supply flow rate control valve in the middle; and a signal for opening the hot water supply flow control valve and for the hot water supply thermistor. The proportional control valve is operated according to the control signal processed by the hot water supply burner to automatically supply hot water to the bathtub by controlling the combustion amount of the hot water supply burner. A control circuit is provided in the water supply channel of the hot water supply heat exchanger to control the proportional control valve to control the combustion amount of each burner to a set hot water temperature by the signal of It is equipped with a water supply detection element that stops the water supply.

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 reheating operation, the signal from the reheating thermistor is processed by the control circuit, and the proportional control valve is operated at the start of the reheating operation to control the combustion amount of the reheating burner, thereby stably controlling the bath water temperature.

In addition, when hot water supply and reheating are operated simultaneously, the control circuit operates the proportional control valve with the output calculated in the hot water supply mode with priority to stably control the hot water temperature, and on the reheating side, the reheating thermistor By controlling the opening and closing of the reheating solenoid valve using the signal, the bathtub water temperature can be stably controlled.

Furthermore, during automatic hot water supply operation, by opening the hot water supply flow rate control valve, hot water is automatically supplied from the hot water heat exchanger to the bathtub through the bathtub automatic hot water supply passage, and the temperature of the automatic hot water supply is determined by the signal from the hot water supply thermistor. The calculated output operates the proportional control valve, controls the combustion amount of the hot water supply burner, and brings the bath water temperature to the desired bath boiling temperature, which is completed by only automatic hot water supply operation without reheating operation. I can do it.

Still, the number of parts can be reduced, the automatic hot water supply function can be made cheaper, and moreover, it is possible to achieve the purpose by making it easy to install and making it effective in terms of construction and aesthetics.

EXAMPLE Hereinafter, an example of the present invention will be described with reference to the schematic diagram of the configuration shown in FIG. Note that the same parts as those in the conventional example described above are given the same reference numerals, detailed explanations are omitted, and different parts will be mainly explained.

1 is a heat exchanger for hot water supply, which is connected to the water supply inlet 1a and the hot water supply inlet 1b, and a water supply detection element (such as a water amount sensor that counts the amount of water) 17'! i-have 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 1 that detects the circulation of hot water are connected to the hot water passage B from the hot water return port 2a to the reheating heat exchanger 2.
9, and further includes the hot water return port 2a and the hot water spout 2.
A hot water circulation passage C is constructed by connecting a bathtub 4 with a connecting pipe 5. 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.

Further, it is formed in a part of the case 710 so that combustion air can be supplied from the total air supply port 9. In the fuel passage, the main solenoid valve 11 and the proportional control valve 13 are connected in series, and this branches the hot water supply solenoid valve 12 to the hot water supply burner 14 and the reheating solenoid valve 15 to the reheating burner. 16, the proportional control valves 13 are branched and connected so that they are connected in common. A control circuit controls the hot water supply temperature to be set by a signal from a hot water supply thermistor 18 installed at the outlet of the hot water supply heat exchanger 1 and a hot water temperature setting device (not shown) of the remote controller 28. Proportional control valve 1 written in mJ with the output calculated in 27
3 is operated to control the combustion amount of the hot water supply burner 14 to stably control the temperature of hot water.

On the other hand, a reheating heat exchanger 2 is provided at the inlet of the reheating heat exchanger 2 to detect the circulating water temperature so that the bath water temperature is set by a bath water temperature setting device (not shown) of the remote controller 28. The control circuit 27 transmits the signal of the thermistor 20 and the signal of the set water temperature.
The system is configured to perform arithmetic processing, operate the proportional control valve 13 with the output, control the combustion amount of the rear-end burner 16, stably control the circulating hot water, and control the bathtub water temperature. . In addition, in order to speed up the rise of the bathtub water temperature, the control circuit 27 proportionally adjusts the combustion amount of the rear-end burner 16 controlled by the proportional control valve 13 to the bath boiling temperature set by the bathtub water temperature setting device. The rear-end collision solenoid valve 15 is configured to be closed when the boiling temperature is reached by controlling at the maximum capacity without any control.

The hot water supply solenoid valve 12 and the rear collision solenoid valve 15 are configured to open and close when controlling the respective hot water temperatures.

Further, when a rear-end collision and hot water supply are simultaneously operated, the control circuit 27 operates the proportional control valve 13 with the output computed in the hot water supply mode preferentially in the control circuit 27 to stably control the hot water temperature, and is the rear collision thermistor 20
By controlling the opening and closing of the electromagnetic valve 15 for rear-end collision using the signal, the bathtub water temperature is stably controlled.

Further, the automatic hot water supply circuit E connects the hot water supply flow rate control valve 24 and the safety valve (vacuum breaker) 29 to the hot water supply thermistor 1.
The hot water supply passage 8 is branched from the hot water supply passage downstream of the hot water supply passage 8, and is connected to the bathtub 4 through the bathtub automatic hot water supply passage 30. Then, by opening the hot water supply flow rate control valve 24, a signal from the hot water supply thermistor 18 that detects the temperature of the hot water obtained through the hot water supply heat exchanger 11 is used.
The proportional control valve i3 is operated using 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 composed.

To explain the operation of the above embodiment, for example, when the hot water heater 21 in a bathroom or kitchen is opened, water flows through the hot water supply pipe 22''f connected to the hot water supply port 1b, and the water supply detection element 17 detects the water supply. When detected, this signal is input to the control circuit 27 to activate the hot water supply operation sequence, and the exhaust fan 7 rotates.Then, the main solenoid valve 11, the hot water supply solenoid valve 12, and the proportional control valve 13 are fully opened. (The ignition holding means is not particularly shown) Then, the hot water supply burner 14 burns to heat the hot water supply heat exchanger 1, and the hot water heater 21 is heated through the hot water supply port 1b'r. Hot water is poured from the bath.

The output temperature of the hot water is detected by the hot water supply thermistor 18, and the proportional control valve is controlled by the output processed by the control circuit 27 so that the hot water temperature is set by the hot water temperature setting device (not shown) of the remote controller 28. 13? Operate the hot water supply burner 1
The combustion fN' of No. 4 is controlled to stably control the hot water temperature.

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

When hot water or water previously stored in the bathtub 4 is circulated by the pump 3, the total circulation water detection element 19 detects this, and the control circuit 27 is configured to operate the rear-end collision operation sequence based on this detection signal. The main solenoid valve 11, rear-end collision solenoid valve 15, and proportional control valve 13 are opened to keep the fuel ignited. (The ignition holding means is not particularly shown.) The rear-end heat exchanger 2 is heated by the combustion of the rear-end burner 15, and the hot water is circulated in the bathtub 4 through the entire connecting pipe 5 from the hot water spout 2b. Hot water is circulated through the return port 2a. The rear collision thermistor 2o detects the temperature of the circulating hot water that is equal to the temperature of the water in the bathtub 4, and the bath is heated to the temperature set by that signal 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 control circuit 27, and the combustion amount of the rear-end burner 16 is controlled to stably control the circulating hot water and control 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 rear-end burner 16 controlled in step 3 is controlled at the maximum capacity without proportional control until it reaches the bath boiling temperature set by the bathtub water temperature setting device. The solenoid valve 15 can also be closed.

When the automatic hot water supply operation switch provided on the remote control 28 is operated, the hot water supply flow control valve 24 (i-valve opens) and hot water is automatically supplied to the bathtub 4 through the hot water supply heat exchanger 1 and the bathtub automatic hot water supply passage 30. That is, The water supply detection element 17 detects the water supply and the control circuit 27 is configured to operate the automatic hot water supply operation sequence, and the exhaust fan 7
rotates.

Then, the control circuit 27 opens the main solenoid valve 11, the hot water supply solenoid valve 12, and the proportional control valve 13 to keep the fuel ignited. (The ignition holding means is not particularly shown) 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 to the bathtub 4 through the hot water supply flow rate control valve 24 and the bathtub automatic hot water supply passage 30. .

The hot water supply temperature is detected by the hot water supply thermistor 18, and the difference between the signal and the hot water supply temperature (desired bath boiling temperature) set by the automatic hot water supply temperature setting device (not shown) of the remote control 28 is detected, The proportional control valve is operated by 13% with the output calculated by the control circuit 27 so that the set hot water temperature is reached, and the combustion amount of the hot water supply burner 14 is controlled to stably control the temperature of hot water to be supplied to the bathtub 4. Automatically supplies hot water.

By doing this, it is possible to complete the automatic hot water supply operation only without having to perform a rear-end operation to reach the desired bath boiling temperature.

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. Then, the hot water supply flow rate control valve 24 can be automatically closed to stop the automatic hot water supply.

Effects of the Invention As described above, the present invention provides a hot water supply heat exchanger, a hot water circulation passage heat exchanger that is connected to a bathtub, and that circulates hot water using a pump, and a proportional control valve that is connected in series to the original solenoid valve. and a solenoid valve for hot water supply and a solenoid valve for rear collision which are branched from the proportional control valve and connected to each of the burner for hot water supply and the burner for rear stroke that heat each of the heat exchangers, and the outlet of the heat exchanger for hot water supply. a hot water supply thermistor for detecting hot water temperature; a rear collision thermistor for detecting hot water temperature; and a hot water supply passage downstream of the hot water supply thermistor;
A bathtub automatic hot water supply passage that is connected to the bathtub and has a hot water supply flow rate control valve in the middle, and the hot water supply flow rate control valve is opened, and the proportional control valve is operated by a control signal that is calculated and processed using the signal of the hot water supply thermistor. The combustion amount of the hot water supply burner is controlled to automatically supply hot water to the bathtub, and the proportional control valve is operated according to the signal from the hot water supply thermistor when hot water is being supplied, and the signal from the rear collision thermistor when a rear collision occurs to control the combustion of each burner. A control circuit that controls the amount of hot water to a set temperature;
It is equipped with a water supply detection element that is installed in the water supply channel of the hot water supply heat exchanger and stops automatic hot water supply in the bathtub when the set amount of hot water supply is reached, and has the following effects.

■ Both hot water supply and rear-end collision use one proportional control valve to proportionally control the amount of combustion and control the hot water temperature, making it possible to stabilize the hot water temperature.

■ Especially since the bath water temperature can be controlled by proportional control,
Energy saving can be achieved compared to conventional hot water temperature control using Hi-Lo-OFF or ○N-0FF control.

■ Since the automatic hot water supply function is built into the main unit, it is possible to reduce the cost and improve workability by making installation free, and it does not impair the aesthetic appearance of the building.

■ By using the water supply detection element as a water flow sensor that counts the amount of water supplied, it is possible to set the amount of hot water supplied to the bathtub as desired and automatically stop the water supply during automatic hot water supply, and detect the amount of water for ignition and extinguishing as usual. There is no need for a water level sensor other than the one that detects the water level in the bathtub.

■ Since hot water can be supplied automatically while the bathtub lid is closed, there is no leakage, and it is energy efficient and economical.

■ The bath can be boiled to the desired temperature only by automatic hot water supply operation without having to run the hot water supply again, and unlike conventional methods, there is no need to run the hot water supply again after the automatic hot water supply, so the bath boiling time is shortened. This allows you to live an economically comfortable bath life.

[Brief explanation of drawings]

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... Hot water supply heat exchanger, 2... Rear-end heat exchanger, 3... Pump, 4... Bathtub, 11...・Original solenoid valve, 12... Solenoid valve for hot water supply, 13... Proportional control valve, 14...
・Hot water supply burner, 15... Rear-end solenoid valve, 16
... Burner for rear-end collision, 17 ... Water supply detection element, 1 day ... Hot water supply thermistor, 19 ...
... Circulating water detection element, 20 ... Rear-end collision thermistor, 24 ... Hot water supply flow rate control valve, 30 ...
・・Tub automatic hot water supply passage.

Claims (1)

[Claims] A heat exchanger for hot water supply, a heat exchanger for reheating a hot water circulation path that is connected to the bathtub and circulates hot water with a pump, a proportional control valve connected in series to the original solenoid valve, and a hot water supply that heats each of the heat exchangers. A solenoid valve for hot water supply and a solenoid valve for reheating are connected to each of the burner for heating and the burner for reheating, branched from the proportional control valve, and a solenoid valve for reheating is provided at the outlet of the heat exchanger for hot water supply to detect the temperature of hot water. A thermistor for reheating is provided at the inlet of the heat exchanger for reheating and detects the temperature of hot water, and a hot water supply passage branched from the hot water supply passage downstream of the thermistor for hot water supply and connected to the bathtub, and a hot water supply flow rate control valve is installed in the middle. a bathtub automatic hot water supply passage having a bathtub, and the hot water supply flow rate control valve are opened, and the proportional control valve is operated according to a control signal calculated using the signal of the hot water supply thermistor to control the combustion amount of the hot water supply burner. In addition to automatically supplying hot water to the bathtub, the proportional control valve is controlled by the signal from the hot water supply thermistor when hot water is being supplied, and by the signal from the reheating thermistor when reheating, and the combustion amount of each burner is controlled to reach the set water temperature. A water heater with a reheating function, which is equipped with a control circuit and a water supply detection element that is installed in the water supply channel of a heat exchanger for hot water supply and automatically stops hot water supply in a bathtub when a set amount of hot water is supplied.