JPS62210349A - Hot water supply and room heating device with additional burning function - Google Patents

Abstract

PURPOSE:To stabilize the hot water temperature, reduce cost, and improve construction work by burning a room heater burner as well, recycling hot water to a bath tub heater, and supplying hot water automatically to the bath tub when the hot water supply capability is exceeded during automatic hot water supply and integrating measurement of a specified amount is made by a supply water detection element, and closing a supply hot water flow rate control valve at an arbitrary set value by a supply water detection element to stop automatic hot water supply. CONSTITUTION:When a comparator 40 operates to compare to find that the signal of a thermistor 23 is lower than a set value of an automatic supply hot water temperature and the difference between the hot water temperature and a desired bath temperature is large with a judgement that the situation exceeds the hot water supply capability and a specified amount set by an automatic supply hot water set value setting device 58 is measured by integration, a room heater operation control section 46 is actuated and an electromagnetic valve 20 is opened, a burner 21 for room heating is burned at the same time, a pump 3 is driven also to open an additional burning temperature adjusting valve 37, recycle hot water to a bath heater 9 and control stably the bath tub temperature with hot water supplied automatically. When integration measurement of a set value of automatic supply hot water by a supply water detection element 22 reaches a set value, a supply hot water flow rate control valve 35 is closed and the automatic hot water supply stops.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a hot water supply/heater with a reheating function, which has functions of automatically raising the bathtub water temperature (automatic reheating) using a bath heater, automatically supplying hot water to the bathtub, and pouring hot water into the bathtub. It is something.

Conventional technology In recent years, hot water heaters with reheating function have been developed to reheat baths using bathtub heaters, which consist of a water heater and an indirect heat exchanger installed in the heating hot water circulation path where hot water is circulated by a pump. At the same time, complex products that provide heating using radiators have been developed9, and automatic hot water supply for baths is progressing, including products that have the function of automatically supplying hot water to the bathtub.

Is the drawing below? : A conventional hot water heater with reheating function will be explained with reference to the following. FIG. 10 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 heating heat exchanger connected to a hot water return port 2a and a hot water spout 2b.

A pump 3, an expansion tank 4, and a bypass pipe 5 are provided in a hot water passage leading from the hot water return port 2a to the heating heat exchanger 2, thereby forming a heating hot water circulation passage. An overflow pipe 6 is connected to the expansion tank 4.

A radiator 8 and a bathtub heater (hereinafter referred to as a bath heater) 9 connected to a bathtub 10 are branch-connected to the heating hot water circulation passage through a disconnection pipe 7 .

An exhaust stack 11 is connected to each of the heat exchangers 1.2,
The exhaust fan 12 is configured to exhaust combustion exhaust gas to an exhaust port 13. In addition, combustion air is supplied to the air supply port 14.
It is formed in a part of the case 15 so that it can be supplied from the inside.

The fuel passage branches off from the main solenoid valve 16, passes through the hot water supply solenoid valve 17 and proportional control valve 18, connects to the hot water supply burner 19, and connects through the entire heating solenoid valve 20 to the heating burner 21. It is configured.

Water supply detection element 2 that detects water supply in the water supply side passage and issues a signal
At the same time, a hot water supply thermistor 23 for detecting the temperature of hot water is provided at the outlet of the hot water supply heat exchanger 1. The expansion tank 4 is provided with a water level switch 24 for detecting the water level of make-up water, and a 25 ft heating thermistor is provided at the outlet of the heating heat exchanger 2 for detecting the circulating water temperature.

A hot water supply pipe 27 connects the hot water heater 26 to a bathroom or kitchen, for example.
An automatic hot water supply unit 28 is connected to the hot water supply port 1b and has a hot water supply control valve 29, a hopper 30, and a bathtub water level sensor 31 for automatically supplying hot water to the bathtub. Connect to 10.

Actuators (electromagnetic valves, pumps, etc.) are configured to be operated by a control circuit a2 and a remote controller 3a in response to signals from the various sensors described above.

Next, to explain the operation, when the hot water heater 26 is opened, water flows into the water supply passage, the water supply detection element 22 is activated, and the main solenoid valve 16, the hot water supply solenoid valve 17, and the proportional control valve 18 are opened. The control circuit 32 controls the hot water supply temperature so that the fuel flowing to the hot water supply burner 19 is ignited and the hot water supply temperature is set by the hot water temperature setting device (not shown) of the remote control 33 according to the signal from the hot water supply therminutor 23. The proportional control valve 18 is operated using the calculated output to control the combustion amount of the hot water supply burner 19, thereby stably controlling the temperature of hot water.

On the other hand, by operating a heating switch (not particularly shown) provided on the remote controller 33, when the water level nuit 24 detects makeup water stored in advance in the expansion tank 4, the pump 3 is operated, and the main solenoid valve 16 and the heating The solenoid valve 20 opens, and the fuel flowing into the heating burner 21 is ignited.

Then, the temperature of the circulating hot water is sensed and set by the signal from the heating thermistor 25 provided at the outlet of the heating heat exchanger 2 and the circulating hot water temperature setting device (not shown) of the remote control 33. The control circuit 32 is operated and the heating solenoid valve 20 is operated to control the combustion amount of the heating burner 21 so that the circulating water temperature is maintained, and the circulating hot water is stably controlled and branched to the connecting pipe 7. The heated water temperature of the radiator 8 is controlled to heat the room, and hot water is circulated to the bath heater 9 to warm the water or hot water (bathtub water) stored in advance in the bathtub 10 to control the bathtub temperature. It is configured as follows.

Furthermore, when an automatic hot water supply operation switch (not shown) provided on the remote control 33 is operated, the hot water supply control valve 29 of the automatic hot water supply unit 28 opens and the automatic hot water supply temperature setting device (not shown) of the remote control 33 is set. The proportional control valve 18ft is operated with the output calculated by the control circuit a2 so that the automatic hot water supply temperature is reached, and the combustion amount of the hot water supply burner 19 is controlled to stably control the hot water temperature. , bathtub 10
Automatic hot water supply has been realized. The water level sensor 31 automatically stops the hot water supply.

Problems to be Solved by the Invention However, in the configuration described above, it is necessary to install the automatic hot water supply unit 2 in the immediate vicinity of the bathtub 10, and if the bathroom is located in the center of the room due to the structure of the building It is impossible to install it on the wall, and even if it could be installed on the wall, it would be unsatisfactory to the appearance of the building, and since the water level sensor is fixed, it would not be possible to freely select the desired water level. Was.

In the case of controlling the bathtub water temperature using a bath heater, there is no sensor to detect the bathtub water temperature, so if the bathtub water temperature is over-boiled or if the bathtub water is cooled while taking a bath, the bathtub water temperature can be raised by operating the heating switch. However, since the capacity of the heating burner is low, there are problems such as it takes a long time to raise the temperature. For this reason, many people often pour hot water set at a high temperature from the hot water tap (faucet) into the bathtub, but due to the high temperature, there were problems such as burns caused by the hot water tap (faucet) and hot water. .

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, and effective in terms of workability and aesthetics.

Means and Description for Solving the Problems In order to solve the problems, the hot water heater with reheating function of the present invention connects to a heat exchanger for hot water supply, a radiator, a bathtub heater, etc., and uses a pump. A heating heat exchanger in a hot water circulation passage for circulating hot water, a proportional control valve connected in series to the solenoid valve, and a proportional control valve for each of the hot water supply burner and heating burner connected to each of the heat exchangers. A solenoid valve for hot water supply and a solenoid valve for heating that are connected in a branched manner, a thermistor for hot water supply that is installed at the outlet of the heat exchanger for hot water supply and detects the temperature of the hot water, and a solenoid valve for hot water supply that is installed at the outlet of the heat exchanger for heating, and the circulating hot water. a heating thermistor for detecting temperature, a hot water supply flow control valve provided in a bathtub automatic hot water supply passage branching from the hot water supply passage downstream of the hot water supply thermistor and connected to the bathtub, and provided in a water supply passage of a hot water supply heat exchanger, A water supply detection element for measuring the amount of water supplied, a reheating thermistor installed in the bathtub heater for detecting the bathtub water temperature, and a reheating temperature control valve that opens and closes according to the signal thereof are provided, and a signal from the hot water thermistor at the time of hot water supply, Also, during heating, the proportional control valve is controlled by the signal from the heating thermistor to control the combustion amount of each burner to the set hot water temperature, and when reheating, the signal from the heating thermistor is used to control the combustion amount of each burner. and a control circuit that controls the hot water temperature in the bathtub to a set water temperature, and the control circuit opens the hot water supply flow rate control valve and performs the proportional control using a control signal calculated using the signal from the hot water supply thermistor. The control signal (
(feedback) to automatically supply hot water at a large flow rate, and at the same time, control the hot water supply flow rate control valve to a small flow rate to supply high-temperature hot water through the bathtub automatic hot water supply passage. When the specified amount is cumulatively measured by the element, the heating solenoid valve is opened by a signal from the control circuit, the heating burner is simultaneously combusted, the pump is also rotated, and the reheating temperature control valve is turned on. The valve is opened to automatically supply hot water to the bathtub while circulating hot water through the bathtub heater, and the hot water supply flow rate control valve is closed at an arbitrary set amount by the water supply detection element to automatically stop the hot 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 heating operation, the proportional control valve is operated using the output calculated by the control circuit based on the signal from the heating thermistor to control the combustion amount of the heating burner, thereby stably controlling the circulating water temperature.

Furthermore, during automatic hot water supply operation, by roughly detecting the bathtub water temperature with a reheating thermistor provided in the bath heater, the reheating temperature control valve can be controlled to control the bathtub water temperature to a set water temperature. In addition, when both hot water supply and heating are operated simultaneously, the control circuit operates the proportional control valve with the output computed in the hot water supply mode to stably control the hot water temperature, and the heating side operates the heating thermistor. By controlling the opening and closing of the heating electromagnetic valve using signals, the circulating water temperature can be stably controlled, so the bathtub water temperature can be controlled by room heating and reheating.

Furthermore, during automatic hot water supply operation, the hot water supply flow rate control valve is fully opened to automatically supply hot water at a large flow rate 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 controlled by the control circuit according to the signal from the hot water supply therminuta. The proportional control valve is operated using the output calculated in , and the combustion amount of the hot water supply burner is controlled. Furthermore, when the water temperature is low, such as in winter, when the hot water supply capacity is exceeded and the specified amount is cumulatively measured by the water supply detection element, the heating solenoid valve is opened by a signal from the control circuit, and the heating burner is also turned on at the same time. By combusting the water and automatically supplying hot water to the bathtub while transmitting the information to the pump and opening the reheating temperature control valve to circulate hot water to the bathtub heater, the bathtub water temperature can be brought to the desired bath boiling temperature in a short time. Hot water can be supplied automatically, and the hot water supply flow rate control valve can be closed at an arbitrary set amount using a water supply detection element, and hot water supply can be automatically stopped, so that the automatic hot water supply operation can be completed without additional heating operation. On the other hand, when cooling water while taking a bath, by controlling the hot water supply flow rate control valve to a small flow rate and pouring high-temperature hot water through the bathtub automatic hot water supply passage, it can be controlled using a high-capacity hot water supply burner. The temperature can be raised in a short time and there is no risk of burns. Also, how many parts? The purpose can be achieved by reducing the cost of the automatic hot water supply function, making it possible to install it freely, and making it effective in terms of workability 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.

1 is a heat exchanger for hot water supply, and has a water supply port 1a and a hot water supply port 1 and b.
The water supply side passage has a water supply detection element (such as a water amount sensor that counts the amount of water) 22 that detects water supply and outputs a signal. 2 is a heating heat exchanger with hot water return port 2a
and is connected to the hot water spout 2b. A pump 3, an expansion tank 4, and a bivanu pipe 5 are provided in a hot water passage leading from the hot water return port 2a to the heating heat exchanger 2, thereby forming a heating hot water circulation passage. An overflow pipe 6 is connected to the expansion tank 4.

The heating hot water circulation passage includes a bath heater 9 connected to a radiator 8 and a bathtub 10 through a connecting pipe 7, a reheating thermistor 38 provided in the bath heater 9 to detect the bathtub water temperature of the bathtub 10, and a reheating temperature control. A valve 37 is provided for branch connection.

An exhaust stack 11 is connected to each of the heat exchangers 1.2,
The exhaust fan 12 is configured to discharge the combustion exhaust gas to the exhaust port 1a.

Further, it is formed in a part of the case 715 so that combustion air can be supplied from the air supply port 14.

The fuel passage connects the original solenoid valve 16 and the proportional control valve 18 in series, branches from this, passes through the hot water supply solenoid valve 17 to the hot water supply burner 19, and passes through the heating solenoid valve 20 to the heating burner 21. Branch connections are made so that the proportional control valves 18 are connected in common.

Next, the schematic diagrams of the control circuit configuration shown in FIGS. 2 and 3 will also be explained. During hot water supply operation, the hot water supply temperature is controlled so that the hot water temperature is set by the signal of the hot water supply thermistor 2G installed at the outlet of the hot water supply heat exchanger 1 for detecting the hot water temperature and the hot water supply temperature setting device 39 of the remote control a3. The comparator 40 of the circuit a2 performs a comparison operation, and the output processed by the arithmetic processing section 41 operates the proportional control valve drive section 42 to operate the proportional control valve 18 and control the combustion amount of the hot water supply burner 19. The hot water supply operation control unit 43 is configured to stably control the temperature of hot water (hot water supply operation sequence).

On the other hand, during heating operation, the heating hot water circulation temperature is set by the signal from the heating thermistor 25 installed at the outlet of the heating heat exchanger 2 for detecting the circulating water temperature and by the circulating hot water temperature setting device 44 of the remote controller 33. The comparator 45 of the control circuit 32 performs a comparison calculation, and the output processed by the calculation processing section 41 is used as the proportional control valve drive section 42'f! : The proportional control valve 18 is operated, the combustion amount of the heating burner 21 is controlled, the circulating hot water is stably controlled, and the temperature of the heating water in the radiator 8 branched to the connecting pipe 7 is adjusted. In addition to heating the room, hot water is circulated to the bath heater 9, which warms water or hot water (bath water) stored in the bathtub 10 in advance to control the temperature of the bathtub. The heating operation control unit 46 is configured to perform (heating operation sequence).

The hot water supply solenoid valve 17 and the heating solenoid valve 20 are provided.

Also, during automatic hot water supply operation, the comparator of the control circuit 32 adjusts the temperature of the bathtub so that the bathtub temperature is set by the signal from the reheating tank 38 provided in the bath heater 9 and the bathtub water temperature setting device 47 of the remote control 33. 48 performs a comparison calculation, and the calculation processing unit 41 uses the output to operate the proportional control valve drive unit 42 to operate the proportional control valve 18 , and the heating burner 21
The reheating operation control unit 49 is configured to combust the water and stably control the bathtub water temperature by controlling the opening and closing of the reheating temperature control valve 37 (reheating operation sequence).

In addition, when both hot water supply and heating are simultaneously operated, the hot water supply operation control section 43 of the control circuit a2 preferentially operates the proportional control valve drive section 42 in the hot water supply mode with the output computed by the arithmetic processing section 41. The proportional control valve 18 is operated to stably control the hot water temperature, and on the heating side, a heating operation control section 46 is configured in the same way as the heating thermistor 25.

Furthermore, during automatic hot water supply operation, a hot water supply flow control valve 35 (driven by a motor or the like and having small flow rate and large flow rate control and valve closing functions (a schematic diagram is shown in FIG. 5) and a safety valve 34
(Vacuum breaker) is provided so as to be branched from the hot water supply passage downstream of the hot water supply therminutor 23 and connected to the bathtub 10 through the bathtub automatic hot water supply passage 36.

Then, by opening the hot water flow rate control valve 35f at a large flow rate in response to a signal from the hot water supply operation control unit 43, the hot water supply heat exchanger 1 is opened completely, and the signal from the hot water supply thermistor 23 and the remote controller 33 are automatically activated. The comparator 40 of the control circuit a2 performs a comparison calculation so that the automatic hot water temperature set by the hot water temperature setting device 50 is reached, and the output processed by the calculation processing unit 41 is used to drive the proportional control valve drive unit. 42 to operate the proportional control valve 18 to control the combustion amount of the hot water supply burner 19 to stably control the hot water temperature (hot water supply operation sequence).

In addition, when the water temperature is low such as in winter, the hot water supply capacity is exceeded, and the signal from the hot water supply thermistor 23 is lower than the automatic hot water temperature setting temperature. In the case where the comparator 40 performs a comparison calculation, the signal from the water supply detection element 22 provided in the water supply passage, which calculates and measures the water supply amount, is sent to the hot water supply operation control unit 4.
3, when the specified amount (for example, about 80 to 100 e, which is 1/3 to 1/2 the water amount of the bathtub 10) is cumulatively measured, the heating operation control section 46 is operated, and the heating solenoid valve 20 is activated. Open the valve to simultaneously burn the heating burner 21 and rotate the pump 3 to open the reheating temperature control valve 3.
Opening the valve 7 to circulate hot water through the bath heater 9 and automatically supplying hot water to the bathtub 10 while controlling the bathtub water temperature,
And the water supply flow rate control valve 3 is detected by the water supply detection element 22.
The hot water supply operation control section 43 is configured to close the valve 5 at an arbitrary set amount and automatically stop the hot water supply.

In addition, during hot water pouring operation, the hot water supply flow rate control valve 35 (
A device that is driven by a motor or the like and has a small flow rate control and a large flow rate control function and a valve closing function (a schematic diagram is shown in FIG. 5) is automatically set to a small flow rate, and the hot water temperature setting of the remote controller 33 is performed. By automatically setting the temperature of hot water to the temperature set by the hot water supply device 51 (located inside the remote control) (for example, about 80° C.), the hot water is passed through the hot water supply heat exchanger 1 and heated to the hot water supply thermistor 23. The comparator 40 of the control circuit 32 compares and calculates the signal with the hot water temperature set by the hot water temperature setting device 51, and the arithmetic processing unit 41 calculates the output. The proportional control valve drive section 4
2 to operate the proportional control valve 18 to control the combustion amount of the hot water supply burner 19 to stably control the temperature of hot water and pour hot water into the bathtub 10 at a small flow rate (high temperature hot water pouring operation). The hot water supply operation control unit 43 is configured as shown in FIG.

Next, the hot water supply capacity characteristic diagram shown in FIG. 4 and the driving schematic diagram of the hot water supply flow rate control valve shown in FIG. 5 will be explained.

FIG. 4 is a hot water supply capacity characteristic diagram of the hot water supply heat exchanger 1. In the case of automatic hot water supply operation, the automatic hot water supply temperature setting device 50
When the hot water supply temperature is set (for example, about 42° C.), the control circuit 32 is set so that the automatic hot water supply flow rate (for example, about 10 e/min) is set by the automatic hot water supply flow rate setting device 52 shown in FIG.
The comparator 54 performs a comparison operation, and the output processed by the arithmetic processing section 55 (which may be the same as the arithmetic processing section 41) operates the hot water supply control valve drive section 56 to drive the motor of the hot water supply flow rate control valve 35. Motor shirt that drives 35a) 35
In conjunction with the gear 35c provided in b, the flow rate control valve (shirt)
The gear 35d connected to 35. is rotated. The flow rate control valve shaft 35 has a threaded portion 35fi, a control valve portion 35g1 spring 35h is provided at the tip, and a control valve body 35iK.
It has been incorporated. The control valve part 35g has a small flow rate, a large flow rate, and a valve closing function for controlling the amount of hot water supplied by the gap with the valve seat 35i, so a large flow rate flows and the automatic hot water supply flow rate is calculated and measured by the water supply detection element 22, The hot water supply flow control valve a5
The flow rate is controlled to a set flow rate.

Further, the automatic hot water supply setting amount set by the automatic hot water supply cumulative flow rate setter 53 of the remote control 33 (automatic hot water supply cumulative flow i corresponding to the desired water level in the bathtub: for example, about 180 g) is cumulatively measured by the water supply detection element 22. Then, the hot water supply flow rate control valve 35 is automatically closed to stop the automatic hot water supply.

On the other hand, in the case of high-temperature pouring hot water operation (B), when the hot water supply temperature is set by the high-temperature pouring hot water temperature setting device 51 (for example, about 80° C.), the high-temperature pouring hot water supply temperature setting device 57 shown in FIG. The comparator 54 of the control circuit 32 performs a comparison calculation to determine whether the set hot water flow rate (for example, about 5 e/min) is reached, and the calculation processing unit 5
4 (which may be the same as the arithmetic processing section 41), the hot water supply flow rate control valve drive section 56'! i, the hot water supply flow rate control valve 35 and the motor 35a'jz are driven to flow a small flow rate, the hot water supply flow rate is calculated and measured by the water supply detection element 22, and the hot water supply flow rate control valve 35 is set to the set flow rate. The flow rate is controlled as follows. the above,
The operation of the embodiment is shown in Fig. 6, a front view of the remote controller, and Fig. 7,
Flowcharts 1-i in FIGS. 8 and 9 will be explained together.

1. After operating the hot water supply operation switch 33a of the hot water supply operation remote control 33,
When you open the hot water heater 26 connected through the hot water supply pipe 27 connected to the hot water supply port 1b, for example in the bathroom or kitchen,
The operating program shown in FIG. 7 starts. Step 59
Automatic hot water supply? , Step 60 hot water? , Step 61 hot water supply? , step 62 heating? The system determines either of these and enters the hot water supply operation mode. The hot water supply operation control section 43 is configured to measure the signal of the water supply detection element 22 in step 63 to detect the amount of water flowing through the water supply passage, and when the amount of ignited water is detected, the hot water supply operation sequence in step 64 is activated. Rotate 1 total. The main solenoid valve 16, the hot water supply solenoid valve 17, and the proportional control valve 18 are fully 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 19, and the hot water is discharged from the hot water heater 26 through the hot water supply port 1b.

The hot water supply temperature is detected by the hot water supply therminutor 23, and in steps 65 and 66, the comparator 40 of the control circuit 32 performs a comparison calculation so that the hot water temperature becomes the hot water temperature set by the hot water temperature setting device 39 of the remote controller 33. , the proportional control valve drive unit 42 is operated by the output processed by the calculation processing unit 41 to operate the proportional control valve 18, and the combustion amount of the hot water supply burner 19 is controlled to stably control the hot water temperature. .

(2) Heating operation and reheating operation On the other hand, by operating the heating operation switch 33b provided on the remote controller 33, the heating operation in step 62 is performed. It is determined that the heating operation mode is activated.

Supply water pre-stored in the expansion tank 4 to the water level 2
4 is detected, the heating operation control unit 46 is configured so that the pump 3 is operated and the temperature of the returned hot water that has been circulated is sent to the Minuta 25 for heating, and the heating operation sequence of the station and the proa is activated. The exhaust fan 12 rotates to open the main solenoid valve 16, the proportional control valve 18, and the heating solenoid valve 20, and keep the fuel ignited. (The ignition holding means is not particularly shown.) The heating heat exchanger 2 is heated by the combustion of the heating burner 21, and the water is circulated from the hot water spout 2b through the connecting pipe 7 to the radiator 8 and the bath heater 9. Hot water return port 2
aK hot water is circulated. In step 68 and step 68, the returned hot water temperature is set to the heating hot water circulation temperature set by the signal from the heating thermistor 25 and the circulating hot water temperature setting device 44 of the remote control 3a (fixed setting inside the remote control). 69
Accordingly, the comparator 45 of the control circuit 32 performs a comparison calculation, and the output processed by the calculation processing unit 41 is used as the proportional control valve drive unit 4.
2 is operated, the proportional control valve 18 is operated, and the combustion amount of the heating burner 21 is controlled to stably control the circulating hot water, and the heating hot water of the radiator 8 branched and connected to the connecting pipe 7 is controlled. In addition to controlling the temperature and heating the room, 4.1:
Hot water is circulated overnight 9, and the heating hot water circulation water temperature is controlled by warming the water or hot water (bathtub water) stored in advance in the bathtub 10 and controlling the bathtub temperature.

Therefore, by opening and closing hot water to the bath heater 9 using a pulp cock or the like, it is possible to freely reheat the bath.

■, Automatic reheating operation When performing automatic reheating operation, by operating the automatic reheating operation switch 33c of the remote control 3a, the automatic reheating operation mode shown in the flowchart shown in FIG. The reheating operation control unit 49 is configured to operate the firing operation sequence, and the exhaust fan 12 rotates in the same way as in the heating operation mode, and the main solenoid valve 16, the proportional control valve 18, and the heating solenoid valve 20? ! -Open the valve and keep the fuel ignited. (The ignition holding means is not particularly shown) and
As the heating burner 21 burns, the heating heat exchanger 2 is heated, and hot water is circulated from the hot water inlet 2b through the connecting pipe 7, through the radiator 8 and the bath heater 9, and to the hot water outlet 2a.

The reheating thermistor 38 provided in the bath heater 9 detects the approximate bath water temperature, and the reheating temperature control valve 37 is opened/closed by the signal and the bath knob 72 set by the bathtub water temperature setting device 47 of the remote controller 33. to control the bath water temperature. By doing this, the bath can be heated automatically (automatic reheating operation).
You can enjoy a comfortable bath life without over-boiling.

■, Automatic hot water supply operation Also, automatic hot water supply operation switch 33 provided on the remote control 33
When d'i is operated, the hot water supply flow rate control valve 35 is activated in step 73.
The hot water supply heat exchanger 1 and the bathtub automatic hot water supply passage 3 are opened.
Hot water is automatically supplied to the bathtub 10 through 6.

In step 74, the signal from the water supply detection element 22 is measured, and when the water supply is detected, the hot water supply operation control section 43 is configured to operate the automatic hot water supply operation sequence in step 75, and the exhaust fan 12 rotates.

The main solenoid valve 16, the proportional control valve 18, and the hot water supply solenoid valve 17 are opened to keep the fuel ignited. (The ignition holding means is not particularly shown in the drawings.) Then, a hot water supply purifier is installed, and hot water is automatically supplied to the bathtub 10 through the hot water supply flow rate control valve 35 and the bathtub automatic hot water supply passage 36. In steps 76 and 77, the comparator 54 of the control circuit 32 and the water supply detection element 22 are adjusted so that the automatic hot water supply flow rate (for example, about 10 e/min) is set by the automatic hot water supply flow rate setting device 52 in FIG. The hot water supply flow rate control valve drive unit 56 is operated using the output processed by the calculation processing unit 55, and the hot water supply flow rate control valve 35 is controlled at a large flow rate to automatically supply hot water. The hot water supply temperature is detected by the hot water supply therminutor 23, and the hot water supply temperature (desired bath boiling temperature) set by the automatic hot water supply temperature setting device 50 of the remote control 33 is compared with the comparator 40 of the control circuit 32, and the hot water is supplied. It is determined in step 78 whether or not the capacity is greater than or equal to the capacity.

Normally, the control is performed within the range of hot water supply capacity (within the range of the solid line hot water supply capacity curve shown in FIG. The arithmetic processing proportional control valve 18 is operated to control the combustion amount of the hot water supply burner 19, the automatic hot water supply setting temperature and the hot water supply temperature are stably controlled, and hot water is automatically supplied to the bathtub 10 at a large flow rate.

Further, the water supply detection element 22 calculates and measures the automatic hot water supply setting amount set by the automatic hot water supply calculation flow rate setter 53 of the remote control 33 (automatic hot water supply cumulative flow rate corresponding to the desired water level in the bathtub: for example, about 180e). When the set amount is reached,
In step 82, the hot water supply flow rate control valve 35 is automatically closed to stop the automatic hot water supply, and the bathtub 10 is heated to the desired bath temperature and any desired water level without reheating. This can be completed with only automatic hot water supply operation.

A safety valve (vacuum breaker) 34 is provided to prevent hot water from the bathtub from flowing back into the hot water supply passage during automatic hot water supply operation.

■ Simultaneous operation of automatic hot water supply and automatic reheating.Also, when the water temperature is low in winter, etc., the hot water supply capacity exceeds the hot water supply capacity, which is indicated by the broken line in the hot water supply capacity characteristic diagram of the hot water supply thermistor 23. The comparator 40 compares and calculates whether the temperature at the 0 point of the curve is greater than the desired bath heating temperature, and if it is determined in step 78 that the hot water supply capacity is exceeded, the automatic hot water supply amount is When the designated amount (for example, 80 to 100e) set by the automatic designated hot water supply amount setter 58 of the remote control 33 shown in FIG. 5 is cumulatively measured in step 83 shown in the flowchart of FIG. Proceeding to the automatic hot water supply and automatic reheating simultaneous operation sequence of step 84 shown in FIG. The pump 3 is also rotated and the reheating temperature control valve a7 is opened,
The hot water is circulated through the bath heater 9, the bath water temperature is controlled in steps 85 and 86, and the automatic hot water supply integrated flow rate corresponding to the desired feng shui level (for example, about 180e) is integrated and measured by the water supply detection element 22, and then in step 87. When the set amount is reached, the hot water supply flow rate control valve 35 is automatically closed in step 88 to stop the automatic hot water supply, and the operation is performed to bring the bathtub 10 to the desired boiling temperature and any desired water level. It can be completed.

■High-temperature pouring hot water operation Also, when the high-temperature hot-water pouring operation mode is determined in step 60 by operating the high-temperature hot-water pouring operation switch 33e of the remote control 33 when the hot water is cooled while taking a bath, the hot-water pouring operation mode is determined in step 60, and the hot water supply flow rate is determined in step 89. The control valve 35 is opened, and hot water is poured into the bathtub 10 through the hot water supply heat exchanger 1 and the bathtub automatic hot water supply passage 36.

The hot water supply operation control unit 43 is configured so that when the signal of the water supply detection element 22 is measured in step 90 and the water supply is detected, the hot water pouring operation sequence in step 91 is operated, and the solenoid valve 17 for the exhaust fan 12 ? Open the valve and 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 19, and hot water is poured into the bathtub 1o through the hot water supply flow rate control valve 35 and the bathtub automatic hot water supply passage 36. Ru.

In step 92 and step 9a, the comparator 5 of the control circuit 32 sets the high temperature difference vortex flow rate (for example, about 5 (17 minutes)) set by the high temperature difference vortex flow rate setting device 57 in FIG.
4 and the signal of the water supply detection element 22, the arithmetic processing section 54 operates the hot water supply control valve drive section 56t with the arithmetic processed output, and the hot water supply flow rate control valve 35 is controlled at a small flow rate. Then, step 94 and step 95 are performed to make the hot water temperature set at the hot water temperature setting device 51 (+3 fixed inside the remote controller) of the remote control 33 (for example, about 80°C). , the comparator 40 of the control circuit 32 performs a comparison calculation, and the output processed by the calculation processing unit 41 operates the proportional control valve drive unit 42 to operate the proportional control valve 18 to reduce the flow rate to the tank 10 of the hot water supply burner 19. You can pour hot water with it.

Hot water supply flow rate control valve 35 ft Controls the flow rate to a small amount to supply high temperature hot water to the bathtub automatic hot water supply passage 36? By doing so, it can be controlled by the large-capacity hot water supply burner 19, so that the bath can be reheated and the temperature raised in a short time, and there is no risk of burns.

As described above, the present invention provides a heat exchanger for hot water supply, a heating heat exchanger for a hot water circulation passage that is connected to a radiator, a bathtub heater, etc., and circulates hot water using a pump, and a former solenoid valve. a proportional control valve connected in series to the heat exchanger, and a solenoid valve for hot water supply and a solenoid valve for heating branched from the proportional control valve and connected to each of the hot water supply burner and heating burner connected to each of the heat exchangers. , a hot water supply thermistor is installed at the outlet of the hot water supply heat exchanger to detect the temperature of hot water; a heating thermistor is installed at the outlet of the heating heat exchanger to detect the circulating water temperature; a water supply detection element provided in a bathtub automatic hot water supply passage that branches from the hot water supply passage and connects to the bathtub to calculate and measure the amount of water supplied; and a reheating thermistor provided in the bathtub heater to detect the bathtub water temperature. The reheating temperature control valve opens and closes based on the signal, and the proportional control valve is controlled by the signal from the hot water supply thermistor during hot water supply and the heating thermistor during heating to set the combustion amount of each burner. and a control circuit that controls the hot water temperature of the bathtub to a set water temperature based on a signal from the reheating thermistor during reheating, and the control circuit opens the hot water flow rate control valve. ``According to a control signal calculated from the signal of the hot water supply thermistor, the proportional control valve is operated to control the combustion amount of the hot water supply burner to supply the hot water to the bathtub;
In response to the control signal (feedback) of the water supply detection element, hot water is automatically supplied at a large flow rate, and at the same time, the hot water supply flow control valve is controlled to a small flow rate to supply high temperature hot water through the bathtub automatic hot water supply passage. is exceeded, and when the specified amount is cumulatively measured by the water supply detection element, the control reheating burner is also combusted at the same time, the pump is also rotated, the additional heating temperature control valve is opened, and the above-mentioned Hot water is automatically supplied to the bathtub while hot water is circulated through the bathtub heater, and the hot water supply flow control valve is closed at an arbitrary set amount by the water supply detection element to stop the automatic hot water supply, thereby achieving the following effect. It has a great effect.

(1) For both hot water supply and heating, one proportional control valve controls the combustion signal proportionally to control the hot water temperature, so the hot water temperature can be stabilized.

(ri) Since the automatic hot water supply function and automatic high temperature hot water pouring function are built into the main unit, the cost can be reduced, installation can be done freely to improve construction efficiency, and the aesthetics of the building will not be impaired. .

(3) By using the water supply detection element as a water flow sensor that counts the amount of water supplied, it is possible to open and close the hot water supply flow rate control valve and to set a large flow rate or a small flow rate, as well as detect the amount of ignition/extinguishing water as in the conventional method. can do.

Since hot water can be supplied automatically while the bathtub is covered, there is no leakage of hot water, which saves energy and is economical.

(5) The desired bath boiling temperature can be reached by only automatic hot water supply operation without additional heating operation, and unlike conventional methods, reheating operation is not required after automatic hot water supply, so the bath can be heated up to 9. It takes less time to bathe, allowing you to enjoy an economically comfortable bath life.

(6) During automatic hot water supply, the amount of hot water corresponding to the desired water level in the bathtub can be set arbitrarily, unlike conventional fixed types, so it is possible to automatically stop the hot water supply to the bathtub,
There is no need for a water level sensor to detect the water level in the bathtub.

(7) When cooling water while taking a bath, by controlling the hot water supply flow rate control valve to a small flow rate and pouring high-temperature hot water through the bathtub automatic hot water supply passage, it can be controlled using a high-capacity hot water supply burner. , it is possible to reheat and heat up the bath in a short time, and there is no risk of burns.

(8) By freely selecting and controlling the automatic hot water supply function, automatic high-temperature hot water supply function, and add-on function, you can enjoy an economical and, in fact, comfortable bath life.

(9) It has a heating function, so you can enjoy a warm bath while heating the bathroom, washroom, dressing room, etc. in winter, and you can also use the bath heater to reheat the bath and hot water to hot water. When cooled, the temperature can be raised in a short time.

(10) Even when reheating the water the next day, the automatic water supply operation allows you to increase the temperature of the bath water and set it to the desired bath boiling temperature, which saves energy and is economical. It is.

(11) When the water temperature is low, such as in winter, when the hot water supply capacity is exceeded, and the signal from the hot water supply thermistor is lower than the automatic hot water temperature setting temperature, or the deviation is large from the desired bath boiling temperature, In addition, a water supply detection element installed in the water supply passage that calculates and measures the amount of water supplied is used to detect a specified amount (for example, 1 part of the bathtub).
When approximately 80 to 10,011 liters, which is 1/3 to 1/2 of the amount of water, is measured, the heating solenoid valve is opened to simultaneously burn the heating burner, and the pump is also rotated to reheat the bathtub. By controlling the water temperature and automatically supplying hot water to the bathtub to the desired bath boiling temperature, and by closing the hot water supply flow control valve at an arbitrary set amount based on the integral measurement of the water supply detection element, Since hot water can be automatically supplied and automatically stopped to bring the water temperature to the desired bath boiling temperature in a short time, the time for boiling and rising the bath is short, and an economical and comfortable bath life can be achieved.

[Brief explanation of drawings]

Fig. 1 is a schematic diagram of the configuration of a hot water heater with reheating function showing an embodiment of the present invention, Figs. 2 and 3 are schematic diagrams of the configuration of the control circuit, and Fig. 4 is a characteristic diagram of the hot water supply capacity. Figure 5 is a schematic diagram of the operation of the hot water supply flow control valve, Figure 6 is a front view of the remote controller,
Figures 7, 8 and 9 are flowcharts;
The figure is a schematic diagram of the configuration of a conventional example. 1... Heat exchanger for hot water supply, 2... Heat exchanger for heating, 3... Pump, 4... Expansion tank, 8... ... Heat radiator, 9 ... Bath heater, 10 ... Bathtub, 16 ... Original solenoid valve, 17 ... Solenoid valve for hot water supply, 18 ... ...
Proportional control valve, 19...Hot water supply burner, 20...
... Solenoid valve for heating, 21 ... Burner for heating, 22 ... Water supply detection element, 23 ... Thermistor for hot water supply, 24 ... Water level switch, 25
... Heating thermistor, 32 ... Control circuit, 3a ... Remote control, 35 ... Hot water supply flow control valve, 36 ... Bathtub automatic Hot water passage, 3
7...Temperature control valve for reheating, 38...Minuta for reheating. Name of agent: Patent attorney Toshio Nakao and 1 other person No. 4
Figure 5 Figure 33-m-Remote control 33ct--One go:%11 turn, Suinna sword c---Jibatsu Su Junren Sui 7su, 33a-11th duty driver Inna J3 a---ril L4 L/j%, tS, SWINNA 3D --! 4 Yumu sword ζ Yodo: day 47 --- bath) a for hot spring fixed each --- self-a, * leak j 1 five pairs each δU --- automatic 伶 4 shiitake mushroom non quantity Yaku fixed number 7 Figure 8 Figure 9 Figure 10

Claims (1)

[Claims] A heat exchanger for hot water supply, a heating heat exchanger in a hot water circulation passage that is connected to a radiator, a bathtub heater, etc. and circulates hot water using a pump, a proportional control valve connected in series to the original solenoid valve, and a proportional control valve connected in series to the original solenoid valve. A solenoid valve for hot water supply and a solenoid valve for heating are branched and connected from the proportional control valve to each of the hot water supply burner and the heating burner facing into the exchanger, and are provided at the outlet of the hot water supply heat exchanger, A hot water supply thermistor that detects the hot water temperature, a heating thermistor that is installed at the outlet of the heating heat exchanger and detects the circulating water temperature, and an automatic bathtub that branches from the hot water supply passage downstream of the hot water supply thermistor and connects to the bathtub. A hot water supply flow rate control valve provided in the hot water supply passage; a water supply detection element provided in the water supply passage of the hot water supply heat exchanger to calculate and measure the amount of water supplied; and a reheating element provided in the bathtub heater to detect the bathtub water temperature. A reheating temperature control valve that opens and closes according to a thermistor and its signal, and a signal from the hot water supply thermistor when hot water is being supplied, and a proportional control valve that is controlled by a signal from the heating thermistor during heating to set the combustion amount of each burner. and a control circuit that controls the hot water temperature of the bathtub to a set water temperature based on a signal from the reheating thermistor during reheating, and the control circuit opens the hot water flow rate control valve. The proportional control valve is actuated by a control signal calculated using the signal from the hot water supply thermistor, and the amount of combustion of the hot water supply burner is controlled to be sent to the bathtub. In addition to automatically supplying hot water at a flow rate, the hot water supply flow control valve is controlled to a small flow rate to supply high-temperature hot water through the bathtub automatic hot water supply passage, and when hot water exceeds the hot water supply capacity during automatic hot water supply and is specified by the water supply detection element. When the amount has been cumulatively measured, the heating solenoid valve is opened by a signal from the control circuit, the heating burner is simultaneously combusted, the pump is also rotated, and the reheating temperature control valve is opened. hot water is automatically supplied to the bathtub while circulating hot water through the bathtub heater, and the hot water supply flow rate control valve is closed at an arbitrary set amount by the water supply detection element to automatically stop the hot water supply. Hot water heater with additional heating function.