JPH0718590B2 - Hot water supply / heater with additional heating function - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a hot water supply / heater with a reheating function, which has a function of automatically heating (hot reheating) the temperature of a bathtub hot water by a bath heater and automatically supplying hot water to a bathtub and high-temperature hot water. It is a thing.

2. Description of the Related Art In recent years, hot water heaters with additional heating function have been equipped with a bath heater that consists of a water heater and an indirect heat exchanger provided in a hot water circulation passage for heating that circulates hot water with a pump. In addition to this, a complex product that heats with a radiator has been developed, and automatic bath hot water supply is progressing, such as the addition of a function to automatically supply hot water to the bathtub.

A conventional hot-water supply / heating machine with a reheating function will be described below with reference to the drawings. FIG. 10 shows a schematic diagram of the configuration of the conventional example.

A heat exchanger 1 for hot water supply is connected to the water supply port 1a and the hot water supply port 1b. A heating heat exchanger 2 is connected to the hot water return port 2a and the hot water outlet port 2b. A pump 3, an expansion tank 4 and a bypass pipe 5 are provided in a hot water passage from the hot water return port 2a to the heating heat exchanger 2 to form a heating hot water circulation passage. An overflow pipe 6 is connected to the expansion tank 4.

A bath heater (hereinafter referred to as a bath heater) connected to a radiator 8 and a bath 10 by a connecting pipe 7 in the heating hot water circulation passage.
9 are branched and connected.

An exhaust pipe 11 is connected to each of the heat exchangers 1 and 2, and a combustion exhaust gas is discharged to an exhaust port 13 by an exhaust fan 12. Further, it is formed in a part of the case 15 so that the combustion air can be supplied from the air supply port 14.

The fuel passage branches off from the original solenoid valve 16 to provide a hot water solenoid valve 17
And a heating control burner 19 through a proportional control valve 18 and a heating burner 21 through a heating solenoid valve 20.

Water supply detection element 22 that detects water supply to the water supply side passage and outputs a signal
In addition to the above, a hot water supply thermistor 23 for detecting the hot water temperature is provided at the outlet of the hot water heat exchanger 1. The expansion tank 4 is provided with a water level switch 24 for detecting the amount of makeup water and a heating thermistor 25 for detecting the circulating hot water temperature at the outlet of the heating heat exchanger 2.

For example, a hot water supply pipe 26 is connected to the hot water supply port 1b through a hot water supply pipe 27 to a bathroom or a kitchen, and a hot water supply control valve 29 for automatically supplying hot water to a bathtub, a hopper 30, and a water level sensor 31 for bath water.
An automatic hot water supply unit 28 having the above is provided so as to branch from the hot water supply pipe 27 and is connected to the bathtub 10.

The actuator (electromagnetic valve, pump, etc.) is configured to be operated by the control circuit 32 and the remote controller 33 in response to the signals from the various sensors.

Next, explaining the operation, by opening the hot water supply pipe 26,
Water flows into the water supply passage, the water supply detection element 22 operates, the main solenoid valve 16, the hot water supply solenoid valve 17, and the proportional control valve 18 open, and the fuel flowing to the hot water supply burner 19 is ignited to ignite the hot water supply thermistor 23. Signal, the hot water supply temperature setting device (not shown) of the remote control 33 sets the hot water supply temperature to operate the proportional control valve 18 with the output processed by the control circuit 32. The combustion amount of the hot water supply burner 19 is controlled to stably control the hot water supply hot water temperature.

On the other hand, when the water level switch 24 detects the make-up water stored in advance in the expansion tank 4 by operating the heating switch (not shown) provided on the remote controller 33, the pump 3 operates, and the original solenoid valve 16 and the heating The solenoid valve 20 is opened to ignite the fuel flowing to the heating burner 21.

Then, the circulating return hot water temperature is detected, and the circulation hot water temperature setting device (not shown) of the remote control 33 and the signal of the heating thermistor 25 provided at the outlet of the heating heat exchanger 2 are set. The control circuit 32 is operated so that the water temperature is reached, the heating solenoid valve 20 is operated, the combustion amount of the heating burner 21 is controlled, and the circulating hot water is stably controlled. In addition to controlling the hot water temperature of the radiator 8 to heat the room, hot water is circulated in the bath heater 9 to warm the water or hot water (tub water) stored in the bathtub 10 in advance to control the bath temperature. Is configured. When the 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 is opened and set by the automatic hot water supply hot water temperature setting device (not shown) of the remote control 33. The proportional control valve 18 is operated by the output processed by the control circuit 32 so as to reach the specified automatic hot water supply temperature, and the hot water supply burner is operated.
By controlling the combustion amount of 19 to stably control the hot water supply temperature, automatic hot water supply to the bathtub 10 is realized. The hot water supply is stopped by the water level sensor 31.

Problems to be Solved by the Invention However, in the above-mentioned configuration, it is necessary to install the automatic hot water supply unit 28 in the immediate vicinity of the bathtub 10, and due to the configuration of the building, installation is not possible when the bathroom is in the center of the room. It was impossible, and even if it could be installed on the wall side, there were problems such as a defect in the appearance and aesthetics of the building and the fact that the water level sensor was fixed and the desired water level could not be freely selected. . In the case of controlling the bathtub hot water temperature by the bath heater, there is no sensor for detecting the bathtub hot water temperature, and when the bath water is overheated, or when the bath water is cooled during bathing, the bath water temperature is raised by operating the heating switch. Although necessary, there was a problem that it took time to raise the temperature because the capacity of the heating burner was small. For this reason, many people often drop hot water from the hot water supply (faucet) into the bathtub, but due to the high temperature there was a problem such as hot water supply (faucet) or burns from hot water. .

In view of the above problems, the present invention intends to provide an automatic hot water supply function which is inexpensive and inexpensive in installation, and which is effective in terms of workability and aesthetics.

Means for Solving the Problems In order to solve the above problems, the hot water supply / room heating machine of the present invention is connected to a heat exchanger for hot water supply, a radiator, a bathtub heater (bath heater), etc. A heating heat exchanger in the circulating hot water circulation passage, a proportional control valve connected in series to the original solenoid valve, and a proportional control valve for each of the hot water supply burner and the heating burner, which are included in the heat exchangers. A hot water supply solenoid valve and a heating solenoid valve that are branched and connected, and provided at the outlet of the hot water supply heat exchanger, provided at the outlet of the hot water supply thermistor and the heating heat exchanger that detect the hot water supply temperature, and the circulating hot water temperature. A thermistor for heating, which branches from a hot water supply passage downstream of the hot water supply thermistor, and a hot water supply flow rate control valve provided in a bathtub automatic hot water supply passage connected to a bathtub, and a water supply passage of the hot water supply heat exchanger, Water supply to calculate and measure water supply A detection element, a reheating thermistor for detecting the bath water temperature provided in the bath heater and a reheating temperature control valve that opens and closes according to the signal thereof are provided, and the signal of the hot water thermistor at the time of hot water supply and the heating at the time of heating The proportional control valve is controlled by the signal of the thermistor for heating to control the combustion amount of each burner to the set hot water temperature, and at the time of additional heating, the bath water temperature is set to the preset hot water temperature by the signal of the additional heating thermistor. And a control circuit for controlling so that the hot water supply flow rate control valve is opened, and the proportional control valve is operated by a control signal arithmetically processed by a signal of the hot water supply thermistor to control the hot water supply. While controlling the combustion amount of the burner and automatically supplying hot water to the bathtub at a large flow rate by the control signal (feedback) of the water supply detecting element, the hot water supply flow rate control valve is controlled to a small flow rate,
When hot water is supplied through the bathtub automatic hot water supply passage and when the water temperature is low during winter, when the hot water supply thermistor signal is lower than the automatic hot water supply temperature In accordance with a signal from the control circuit, the heating solenoid valve is opened to simultaneously burn the heating burner, the pump is also rotated, and the additional heating temperature control valve is opened to the bath heater. The hot water is automatically supplied to the bath while circulating hot water, and the hot water supply detection element closes the hot water supply flow rate control valve at an arbitrary set amount to stop the automatic hot water supply.

With the above-described configuration, the present invention operates the proportional control valve with the output calculated by the control circuit by the signal of the hot water supply thermistor to control the combustion amount of the hot water supply burner and stabilize the hot water supply temperature during the hot water supply operation. Can be controlled,
During the heating operation, the proportional control valve is operated by the output calculated by the control circuit according to the signal from the heating thermistor to control the combustion amount of the heating burner to stably control the circulating hot water temperature.

Further, when both the hot water supply and the heating are simultaneously operated, the control circuit gives priority to the operation of the output in the hot water supply mode to operate the proportional control valve to stably control the hot water temperature, and the heating side controls the heating thermistor. Since the circulating hot water temperature can be stably controlled by controlling the opening / closing of the heating solenoid valve by the signal, it is possible to control the bath water temperature by heating the room and heating the room.

Furthermore, during the automatic hot water supply operation, the hot water supply flow rate control valve is opened to automatically supply a large amount of water from the hot water supply heat exchanger to the bathtub through the bathtub automatic hot water supply passage, and the automatic hot water supply temperature is controlled by the signal from the hot water supply thermistor. The proportional control valve is operated by the output calculated in the above step to control the combustion amount of the hot water supply burner. If the hot water supply capacity is exceeded when the water temperature is lower, such as during winter, the heating solenoid valve is opened by the signal from the control circuit to burn the heating burner to the same question, and the pump is also rotated to add heat. By opening the temperature control valve and automatically supplying hot water to the bathtub while circulating hot water in the bath heater, it is possible to automatically supply hot water to the desired bath boiling temperature in a short time, and a water supply detection element. By this, the hot water supply flow rate control valve can be closed at an arbitrary set amount, and the automatic hot water supply can be stopped, and the automatic hot water supply operation can be completed without the additional heating operation.

On the other hand, when hot water is cooled during bathing, the hot water supply flow rate control valve is controlled to a small flow rate and high-temperature hot water is supplied through the bathtub automatic hot water supply passage. The temperature can be raised in a short time and there is no risk of burns. In addition, the number of parts can be reduced, the cost of the automatic hot water supply function can be reduced, and the installation can be freely performed to improve the workability and aesthetics to achieve the purpose.

Embodiment An embodiment of the present invention will be described below with reference to the schematic configuration diagram of FIG.

Reference numeral 1 denotes a heat exchanger for hot water supply, which is connected to the water supply port 1a and the hot water supply port 1b, and 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 in the water supply side passage. A heating heat exchanger 2 is connected to the hot water return port 2a and the hot water outlet port 2b. A pump 3, an expansion tank 4 and a bypass pipe 5 are provided in a hot water passage from the hot water return port 2a to the heating heat exchanger 2 to form a heating hot water circulation passage. An overflow pipe 6 is connected to the expansion tank 4.

A bath heater 9 connected to a radiator 8 and a bath 10 by a connecting pipe 7 in the heating hot water circulation passage, and a thermistor for reheating that detects the bath water temperature of the bath 10 provided in the bath heater 9.
38 and an additional heating temperature control valve 37 are provided and are branched and connected.

An exhaust pipe 11 is connected to each of the heat exchangers 1 and 2, and a combustion exhaust gas is discharged to an exhaust port 13 by an exhaust fan 12.

Further, it is formed in a part of the case 15 so that the combustion air can be supplied from the air supply port 14.

In the fuel passage, the original solenoid valve 16 and the proportional control valve 18 are connected in series,
Branch from this and pass the hot water supply solenoid valve 17 to the hot water supply burner.
19 and a heating burner 21 through a heating solenoid valve 20 are branched and connected so that the proportional control valve 18 is commonly connected.

Next, the schematic diagrams of the control circuit configurations shown in FIGS. 2 and 3 will also be described. During the hot water supply operation, the hot water supply thermistor 23 provided at the outlet of the hot water supply heat exchanger 1 for detecting the temperature of the hot water supply and the remote control 33 for controlling the hot water supply temperature set by the hot water supply temperature setting device 39 are controlled. The comparator 40 of the circuit 32 performs a comparison operation,
Proportional control valve drive unit with output processed by calculation processing unit 41
The hot water supply operation control unit 43 is configured to operate the proportional control valve 18 by operating 42 to control the combustion amount of the hot water supply burner 19 to stably control the hot water supply hot water temperature (hot water supply operation sequence). .

On the other hand, during the heating operation, the signal from the heating thermistor 25 for detecting the circulating hot water temperature provided at the outlet of the heating heat exchanger 2 and the circulating hot water circulating temperature set by the circulating hot water temperature setter 44 of the remote controller 33 are set. Therefore, the comparator 45 of the control circuit 32 performs a comparison calculation, and the proportional control valve drive unit 42 is operated by the output processed by the calculation processing unit 41, the proportional control valve 18 is operated, and the heating burner is operated. The amount of combustion of 21 is controlled to stably control the circulating hot water to control the heating hot water temperature of the radiator 8 branch-connected to the connecting pipe 7 to heat the room, and the hot water is circulated to the bath heater 9. Then, the heating operation controller 46 is configured to warm the water or hot water (tub water) previously stored in the bathtub 10 and control the heating hot water circulation hot water temperature for controlling the bath temperature (heating operation sequence). There is.

The hot water supply solenoid valve 17 and the heating solenoid valve 20 are configured as a hot water supply operation control unit 43 and a heating operation control unit 46 so as to open and close when controlling the respective hot water temperatures.

Further, during automatic heating operation, a control circuit is provided so that the signal from the additional heating thermistor 38 provided in the bath heater 9 and the bath temperature set by the bath hot water temperature setting device 47 of the remote controller 33 become the bath temperature.
The proportional control valve drive unit 42 is operated by the output that is compared and calculated by the 32 comparators 48 and is processed by the calculation processing unit 41.
18 is operated, the heating burner 21 is burned, and the reheating temperature control valve 37 is controlled to open and close to stably control the bath water temperature (reheating operation sequence). I am configuring.

Further, during the simultaneous operation of both the hot water supply and the heating, the hot water supply operation control unit 43 of the control circuit 32 preferentially operates the proportional control valve drive unit 42 with the output processed by the arithmetic processing unit 41 in the hot water supply mode. While operating the proportional control valve 18 to stably control the hot water temperature, the heating side controls the opening / closing of the heating solenoid valve 20 by the signal of the heating thermistor 25.
The heating operation control unit 46 is configured to stably control the circulating hot water temperature (simultaneous operation sequence).

Further, at the time of the automatic hot water supply operation, the hot water supply flow rate control valve 35 (having a function of controlling a small flow rate and a large flow rate driven by a motor or the like and a valve closing function: a schematic diagram is shown in FIG. 5) and a safety valve 34 (vacuum breaker) are provided. It is provided by branching from a hot water supply passage downstream of the hot water supply thermistor 23, and by being connected to the bathtub 10 through a bathtub automatic hot water supply passage 36.

Then, by opening the hot water supply flow rate control valve 35 at a large flow rate by the signal from the hot water supply operation control unit 43, the hot water supply heat exchanger 1 is passed through, the signal from the thermistor 23 for the device and the automatic device of the remote controller 33. The comparator 40 of the control circuit 32 performs a comparative calculation so that the automatic hot water supply temperature set by the hot water temperature setting device 50 is obtained, and the proportional control valve drive unit 42 is operated by the output of the calculation processing unit 41. 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 and to automatically supply hot water to the bathtub 10 at a large flow rate (automatic hot water supply operation sequence). The hot water supply operation control unit 43 is configured.

Further, when the water temperature is low, such as in the winter season, the hot water supply capacity is exceeded, the signal of the hot water supply thermistor 23 becomes lower than the automatic hot water hot water temperature set temperature, and the deviation from the desired bath boiling temperature is large. When the comparison hot water 40 is compared and operated, the heating operation control unit 46 is operated, the heating solenoid valve 20 is opened to burn the heating burner 21 at the same time, and the pump 3 is also rotated. The additional heating temperature control valve 37 is opened, hot water is circulated in the bath heater 9 to automatically supply hot water to the bathtub 10 while controlling the bath water temperature, and the hot water supply flow control valve 35 is arbitrarily set by the water supply detection element 22. The hot water supply operation control unit 43 is configured so that the valve is closed and the automatic hot water supply is stopped at the set amount.

Further, during hot water hot water operation, the hot water supply flow rate control valve 35 (having a function of controlling a small flow rate and a large flow rate driven by a motor and a closing function: a schematic diagram is shown in FIG. 5) is automatically set to a small flow rate. The hot water supply is performed by setting and automatically setting the temperature so that the hot water temperature (for example, about 80 ° C.) set by the high temperature hot water hot water setter 51 (inside the remote control) of the remote controller 33 is set. The comparator 40 of the control circuit 32 performs a comparison calculation so that the signal of the thermistor 23 for hot water supply and the hot water temperature set by the high-temperature hot water hot water temperature setting device 51 are passed through the heat exchanger 1 for heating. The output of the arithmetic processing unit 41 operates the comparison 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. Then, hot water is poured into the bathtub 10 at a small flow rate (high temperature hot water). Operation Sequence) As described above, it is to constitute the hot water supply operation control unit 43.

Next, the hot water supply capacity characteristic diagram of FIG. 4 and the drive hot water flow rate control valve schematic diagram of FIG. 5 will be described.

FIG. 4 is a characteristic diagram of the hot water supply ability of the heat exchanger 1 for hot water supply, and in the case of the automatic hot water supply operation (A), the automatic hot water supply hot water temperature setting device.
At the hot water supply temperature set at 50 (for example, about 42 ° C),
The comparator 54 of the control circuit 32 so that the automatic hot water supply flow rate set by the automatic hot water supply flow rate setting device 52 (for example, about 10 l / min) is obtained.
And the motor 35a of the hot water supply flow rate control valve 35 is operated by operating the hot water supply flow rate control valve drive unit 56 with the output processed by the calculation processing unit 55 (which may be the same as the calculation processing unit 41).
To drive.

The gear 35d connected to the flow control valve shaft 35e is rotated in conjunction with the gear 35c provided on the motor shaft 35b. The flow control valve shaft 35e has a threaded portion 35f and has a control valve portion at the tip.
35g is provided with a spring 35h and is incorporated in the control valve body 35i.

Since the control valve 35g has a small amount of hot water supply, a large flow amount and a valve closing function due to the gap with the valve seat 35i, a large flow amount flows, and the automatic hot water supply flow amount is calculated and measured by the water supply detection element 22, The hot water supply flow rate control valve 35 is configured to control the flow rate so that the set flow rate is achieved. In addition, the automatic hot water supply set amount set by the automatic hot water supply integrated flow rate setting device 53 of the remote controller 33 (the automatic hot water supply integrated flow rate corresponding to the desired water level to the bathtub:
In l), when the water supply detecting element 22 performs integrated measurement, 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 hot water operation (B), when the hot water supply temperature set by the high temperature hot water hot water temperature setting device 51 (for example, about 80 ° C.) is set by the high temperature hot water hot water flow setting device 57 of FIG. Control circuit 3 so that the set high-temperature hot water flow rate (for example, about 5 l / min)
The comparator 54 of 2 is operated for comparison, and the hot water supply flow rate control valve drive unit 56 is operated by the output processed by the calculation processing unit 54 (may be the same as the calculation processing unit 41), and the hot water supply flow rate control valve is operated.
The motor 35a of 35 is driven to flow a small flow rate, the high-temperature hot water flow rate is calculated and measured by the hot water supply detection element 22, and the hot water supply flow rate control valve 35 is controlled to a set flow rate.

The operation of the above embodiment will be described with reference to the remote controller front view of FIG. 6 and the flowcharts of FIGS. 7, 8, and 7.

I, Hot water supply operation After operating the hot water supply operation switch 33a of the remote control 33, when the hot water supply pipe 26 connected to the hot water supply port 1b, for example, in the bathroom or kitchen is opened, the operation shown in FIG. 7 is performed. The program starts. Automatic hot water supply in step 58? , Hot water in step 59? , Hot water supply in step 60? ,
Step 61 heating? Is determined, and the hot water supply operation mode is set.

The water flowing through the water supply passage is measured in step 62 by the signal of the water supply detection element 22, and when the amount of ignition water is detected, the hot water supply operation control unit 43 is configured to operate the hot water supply operation sequence in step 63. Rotates.

The original solenoid valve 16, the hot water supply solenoid valve 17, and the proportional control valve 18 are opened to keep the fuel ignited. (The ignition holding means is not particularly shown.) Then, the hot water supply burner 19 burns to heat the hot water supply heat exchanger 1, and the hot water supply port 1b is used to supply hot water.
26 is tapped.

The hot water temperature is detected by the hot water supply thermistor 23 and the remote control
In step 64 and step 65, the comparator 40 of the control circuit 32 performs a comparative calculation so that the hot water supply temperature set by the hot water supply hot water temperature setting device 39 of 33 is proportional, and is proportional to the output processed by the calculation processing part 41. The control valve drive unit 42 is operated 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 supply temperature.

II, 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 61 is performed. And the heating operation mode is set.

Make-up water stored in the expansion tank 4 in advance is supplied with the water level switch 24.
Is detected, the heating operation control unit 46 is configured so that the pump 3 operates, the return hot water circulated by the hot water is detected by the heating thermistor 25, and the heating operation sequence of step 66 operates. The fan 12 rotates to open the original solenoid valve 16, the proportional control valve 18, and the heating solenoid valve 20 to keep the fuel ignited. (Ignition holding means is not particularly shown) Then, the heating burner 21 burns to heat the heating heat exchanger 2 to circulate the radiator 8 and the bus heater 9 from the hot water outlet 2b through the connection pipe 7, Hot water is circulated through the hot water return port 2a. Step 67 and step 68 so that the returned hot water temperature becomes the heating hot water circulating temperature set by the signal of the heating thermistor 25 and the circulating hot water temperature setting device 44 of the remote controller 33 (fixed in the remote controller). Control circuit
32 comparators 45 perform a comparison calculation, and the proportional control valve drive unit 42 is operated by the output processed by the calculation processing unit 41, the proportional control valve 18 is operated, and the combustion amount of the heating burner 21 is controlled. Then, the circulating hot water is stably controlled to control the heating hot water temperature of the radiator 8 that is branched and connected to the connecting pipe 7 to heat the room, and the hot water is circulated in the bath heater 9 to be preliminarily stored in the bathtub 10. The heating hot water circulating hot water temperature for controlling the bath temperature by warming the stored water or hot water (bath water) is controlled.

Therefore, by opening and closing the hot water to the bath heater 9 with a valve cock or the like, the bath reheating operation can be freely performed.

III, automatic heating operation In addition, when performing the automatic heating operation, by operating the automatic heating operation switch 33c of the remote controller 33, the automatic heating operation mode of the flowchart shown in FIG.
The heating operation control unit 49 is configured to operate the automatic heating operation sequence of 69, and the exhaust fan 12 rotates to rotate the original solenoid valve 16, the proportional control valve 18, and the heating solenoid valve as in the heating operation mode. Open valve 20 to keep the fuel ignited. (Ignition holding means is not particularly shown) Then, the heating burner 21 burns to heat the heating heat exchanger 2 to circulate the radiator 8 and the bus heater 9 from the hot water outlet 2b through the connection pipe 7, Hot water is circulated through the hot water return port 2a.

An additional thermistor for hot water heating 38 provided in the bath heater 9 detects the approximate bath water temperature, and the signal and the bath temperature set by the bath water temperature setting device 47 of the remote control 33 are brought to the bath boiling temperature, step 70 and step The heating temperature control valve 37 is controlled to open and close by 71 to control the bath water temperature.

By doing this, the automatic boiling of the bath (automatic heating operation) will not be overheated and a comfortable bath life will be achieved.

IV, automatic hot water supply operation When the automatic hot water supply operation switch 33d provided on the remote controller 33 is operated, the hot water supply flow control valve 35 is opened in step 72,
Hot water is automatically supplied to the bathtub 10 through the hot water supply heat exchanger 1 and the bathtub automatic hot water supply passage 36.

When the signal of the water supply detection element 22 is measured in step 73 and the water supply is detected, the hot water supply operation control unit 43 is configured so that the automatic hot water supply operation sequence of step 74 operates, and the exhaust fan 12 rotates.

The original solenoid valve 16, the proportional control valve 18, and the hot water supply solenoid valve 17 are opened, and the fuel is ignited and held. (Ignition holding means is not particularly shown) Then, the hot water supply burner 19 burns to heat the hot water supply heat exchanger 1, and the 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. . Step 75 and step 76 so that the automatic hot water supply flow rate set by the automatic hot water supply flow rate setting device 52 in FIG. 5 (for example, about 10 l / min)
According to the above, the comparator 54 of the control circuit 32 and the signal of the water supply detection element 22 are compared and operated, and the hot water supply flow rate control valve drive unit 56 is operated by the output processed by the arithmetic processing unit 55, and the hot water supply flow rate control valve is operated. 35 is controlled with a large flow rate and hot water is automatically supplied.

The hot water supply temperature is detected by the hot water supply thermistor 23 and the remote control
The hot water supply temperature (desired bath boiling temperature) set by the automatic hot water supply hot water temperature setting device 50 of 33 is compared with the comparator 40 of the control circuit 32, and it is determined at step 77 whether or not the hot water supply capacity is equal to or higher than the hot water supply capability.

Normally, it is controlled within the hot water supply capacity range, so in steps 78 and 79, the comparator 40 of the control circuit 32 performs a comparison calculation, and the proportional control valve drive part 42 is operated by the output processed by the calculation processing part 41. Then, the proportional control valve 18 is operated to control the combustion amount of the hot water supply burner 19 to stably control the hot water supply hot water temperature to the automatic hot water supply set temperature, and automatically supply hot water to the bathtub 10 at a large flow rate.

Further, the automatic hot water supply set amount set by the automatic hot water supply integrated flow rate setting device 53 of the remote controller 33 (the automatic hot water supply integrated flow rate corresponding to the desired water level to the bathtub: for example, about 180 l) is integrated and measured by the water supply detection element 22 in step 80. When the set amount is reached, the hot water supply flow rate control valve 35 is automatically closed in step 81 to stop the automatic hot water supply, and the bath temperature is added to the bathtub 10 at the desired bath boiling temperature and at the desired desired water level. It can be completed only by the automatic hot water supply operation without the burning operation.

Safety valve (vacuum breaker) 34 is
This is to prevent the hot water in the bathtub from flowing back into the hot water supply passage.

Simultaneous operation of V, automatic hot water supply and automatic reheating 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 23 becomes lower than the automatic hot water hot water temperature set temperature. If the comparator 40 performs a comparison calculation that the deviation is larger than the bath boiling temperature, and it is determined in step 77 that the difference is greater than the hot water supply capacity, the automatic hot water supply / automatic simultaneous heating operation sequence of step 82 shown in the flowchart of FIG. Then, the heating operation control unit 46 is operated to open the heating solenoid valve 20 to open the heating burner.
21 is also burned at the same time, the pump 3 is also rotated to open the additional heating temperature control valve 37, and hot water is circulated in the bath heater 9, and the hot water temperature in the bathtub is controlled by steps 83 and 84 to obtain the desired temperature. The bath water temperature is controlled stably while automatically supplying hot water so that the bath boiling temperature is reached.

In addition, the automatic hot water supply set amount set by the automatic hot water supply integrated flow rate setting device 53 of the remote controller 33 (the automatic hot water supply integrated flow rate corresponding to the desired water level to the bathtub: for example, about 180 l) is integrated and measured by the water supply detection element 22 in step 85. When the set amount is reached, the hot water supply flow rate control valve 35 is automatically closed in step 86 to stop the automatic hot water supply, and the bath is operated at the desired bath boiling temperature and at the desired desired water level in the bathtub 10. Can be completed.

VI, high temperature hot water operation In addition, if the high temperature hot water operation mode is determined in step 59 by operating the high temperature hot water operation switch 33e of the remote controller 33 when the water is cooled during bathing, the hot water supply flow rate is determined in step 87. The control valve 35 is opened, and the hot water heat exchanger 1
And hot water is poured into the bathtub 10 through the bathtub automatic hot water supply passage 36.

In step 88, the signal of the water supply detection element 22 is measured, and when the water supply is detected, the hot water supply operation control unit 43 is configured so that the high temperature hot water operation sequence of step 89 operates, and the exhaust fan 12 rotates. Solenoid valve 16, proportional control valve 18,
The solenoid valve 17 for hot water supply is opened to keep the fuel ignited.
(Ignition holding means is not specifically shown) And burner for hot water supply
The heat exchanger 1 for hot water supply is heated by burning 19
Bathtub 10 through hot water supply flow control valve 35 and bathtub automatic hot water supply passage 36
Is heated to a high temperature. High-temperature hot water flow rate setter 57 in FIG.
At step 90 and step 91, the comparator 54 of the control circuit 32 and the signal of the water supply detection element 22 are compared and calculated so that the high temperature hot water flow rate (for example, about 5 l / min) set by
The hot water supply flow rate control valve drive unit 56 is operated by the output processed by the calculation processing unit 54 to control the flow rate of the hot water supply flow rate control unit 35 at a small flow rate, and the high temperature hot water supply hot water temperature setting device 51 (remote control unit) of the remote controller 33. In order to reach the hot water temperature (for example, about 80 ° C.) set by the internal fixed setting), in step 92 and step 93, the comparator 40 of the control circuit 32 performs a comparison operation, and the operation processing part 41. The proportional control valve drive unit 42 with the output processed by
And the proportional control valve 18 is operated to control the combustion amount of the hot water supply burner 19 to stably control the hot water temperature, so that hot water can be poured into the bathtub 10 at a small flow rate.

By controlling the hot water supply flow rate control valve 35 to a small flow rate and performing high-temperature hot water supply through the bathtub automatic hot water supply passage 36, it is possible to control the hot water supply burner 19 with a large capacity, so that the bath is heated in a short time, and The temperature can be raised and there is no risk of burns.

EFFECTS OF THE INVENTION As described above, the present invention provides a heating heat exchanger for a hot water circulation passage that is connected to a hot water supply heat exchanger and a radiator, a bath heater, or the like and circulates hot water with a pump, and an original solenoid valve. A proportional control valve connected in series, to each of the hot water supply burner and heating burner, which are desired for each heat exchanger, a hot water supply solenoid valve and a heating solenoid valve branched and connected from the proportional control valve, A hot water supply thermistor for detecting the hot water supply hot water temperature provided at the outlet of the hot water supply heat exchanger, and a heating thermistor provided at the exit of the heating heat exchanger for detecting the circulating hot water temperature, and hot water supply downstream of the hot water supply thermistor A hot water supply flow control valve provided in a bathtub automatic hot water supply passage that branches from the passage and is connected to the bathtub, a water supply detection element that is provided in the water supply passage of the hot water supply heat exchanger and calculates and measures the amount of water supply, and the bath heater. Detects the bath water temperature provided The additional heating thermistor and the additional heating temperature control valve that opens and closes by its signal, the signal of the hot water supply thermistor during hot water supply, and the signal of the heating thermistor during heating controls the proportional control valve to control each burner. And a control circuit for controlling the combustion amount to a set hot water temperature, and for controlling the bath water temperature to a set hot water temperature by a signal from the additional heating thermistor at the time of additional heating, wherein the control circuit is the hot water supply The flow control valve is opened, and the proportional control valve is operated by a control signal calculated by the signal of the hot water supply thermistor to control the combustion amount of the hot water supply burner and control the water supply detection element to the bathtub. Automatic hot water supply with a large flow rate by a signal (feedback), while controlling 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 and during automatic hot water supply When the hot water supply capacity is exceeded, the heating solenoid valve is opened by the signal of the control circuit to simultaneously burn the heating burner, and the pump is also rotated to open the additional heating temperature control valve. While automatically circulating hot water to the bathtub heater while supplying hot water to the bathtub, the hot water supply detection element closes the hot water supply flow rate control valve at an arbitrary set amount to stop automatic hot water supply. It has such an effect.

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

(2) The automatic hot water supply function and the automatic high-temperature hot water supply function are built into the main body, so that it is possible to reduce the cost and improve the workability by allowing the installation to be freely done, while not impairing the aesthetics of the building. .

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

(4) Since the hot water can be automatically supplied with the lid on the bathtub, there is no need to sprinkle water, energy can be saved, and it is economical.

(5) Without heating to the desired bath boiling temperature,
It can be completed only by the automatic hot water supply operation, and no additional heating operation is required after the automatic hot water supply as in the past, so the bath boiling time is shortened, and an economically comfortable bath life can be achieved.

(6) Unlike the conventional fixed type, the amount of hot water supplied to the bathtub during automatic hot water supply can be set arbitrarily, unlike the conventional fixed type, so automatic hot water supply to the bathtub can be stopped and the water level in the bathtub can be detected. Doesn't require a water level sensor.

(7) When hot water is cooled during bathing, the hot water supply flow rate control valve is controlled to a small flow rate and hot hot water is fed through the bathtub automatic hot water supply passage, so that it can be controlled by a large capacity hot water supply burner. In addition, you can reheat the bath and heat up in a short time, and there is no risk of burns.

(8) Economically comfortable by freely selecting and controlling the automatic hot water supply function, automatic high temperature hot water supply function, and additional function.
You can have a bath life.

(8) As it has a heating function, it can be used in bathrooms, washrooms, etc.
While heating the dressing room, you can have a warm bath life, and by using additional heating with a bath heater and high-temperature hot water, it is possible to raise the temperature in a short time when the water is cooled.

(10) Even in the case of boiling back on the next day, it is possible to save energy because it is possible to set the desired bath boiling temperature as well as the bath water temperature by performing the automatic reheating operation. Target.

(11) When the water temperature exceeds the hot water supply capacity when the water temperature is low, such as in the winter, and the signal from the hot water supply thermistor becomes lower than the set temperature for automatic hot water supply and the deviation from the desired bath boiling temperature is large, Open the solenoid valve for heating to burn the heating burner at the same time, and also rotate the pump to open the additional heating temperature control valve to circulate hot water in the bath heater and control the hot water temperature in the bathtub. The bath water temperature is raised to the desired bath temperature by automatically supplying hot water to the bathtub so that the bath boiling temperature is reached, and by closing the hot water flow control valve at an arbitrary set amount by the integrated measurement of the water supply detection element. The automatic hot water supply and the automatic hot water supply can be stopped in a short time up to the temperature, so the bath boiling time will be shortened and you will be able to enjoy a comfortable bath life economically.

[Brief description of drawings]

FIG. 1 is a schematic configuration diagram of a hot water supply / room heating machine with an additional heating function according to an embodiment of the present invention, FIGS. 2 and 3 are schematic configuration diagrams of the control circuit, and FIG. FIG. 5 is a schematic view of driving the hot water supply flow rate control valve, FIG. 6 is a front view of the remote controller,
FIG. 7, FIG. 8 and FIG. 9 are flowcharts, and FIG. 10 is a schematic configuration diagram of a conventional example. 1 ... Heat exchanger for hot water supply, 2 ... Heat exchanger for heating, 3 ...
Pump, 4 ... Expansion tank, 8 ... Radiator, 9 ... Bath heater, 10 ... Bathtub, 16 ... Original solenoid valve, 17 ... Hot water solenoid valve, 18 ... Proportional control valve, 19 ... Hot water supply Burner, 20 ……
Solenoid valve for heating, 21 ... Heating burner, 22 ... Water supply detection element, 23 ... Hot water supply thermistor, 24 ... Water level switch, 25
...... Thermistor for heating, 32 ...... Control circuit, 33 ...... Remote control, 35 …… Hot water supply flow rate control valve, 36 …… Bathtub automatic hot water supply passage,
37: Additional heating temperature control valve, 38: Additional heating thermistor.

Claims (1)

[Claims] 1. A heating control heat exchanger for a hot water circulation passage, which is connected to a hot water supply heat exchanger, a radiator, a bath heater, and the like, and a proportional control valve connected in series to the original solenoid valve. A hot water supply solenoid and a heating solenoid valve branched and connected from the proportional control valve to each of the hot water supply burner and the heating burner desired for each heat exchanger, and the hot water heat exchanger. Is provided at the outlet of the hot water supply thermistor for detecting the hot water supply temperature and the outlet of the heating heat exchanger, and the heating thermistor for detecting the circulating hot water temperature is branched from the hot water supply passage downstream of the hot water supply thermistor to form a bathtub. The hot water supply flow rate control valve provided in the bathtub automatic hot water supply passage, the water supply detection element that is provided in the water supply passage of the hot water heat exchanger and calculates and measures the amount of water supply, and the bath water temperature provided in the bath heater. With the thermistor for additional heating to detect The hot-water temperature control valve that opens and closes according to the signal of, and the signal of the hot water supply thermistor during hot water supply, and the signal of the heating thermistor during heating controls the proportional control valve to set the combustion amount of each burner to the set hot water temperature. And a control circuit for controlling the bathtub hot water temperature to a set hot water temperature by a signal from the hot water heating thermistor during the hot water heating, and the control circuit opens the hot water supply flow rate control valve. , The proportional control valve is operated by a control signal calculated by the signal of the hot water supply thermistor to control the combustion amount of the hot water supply burner to the bathtub, and a large flow rate is supplied by the control signal (feedback) of the water supply detection element. Along with automatic hot water supply, the hot water supply flow rate control valve is controlled to a small flow rate to supply high temperature hot water through the bathtub automatic hot water supply passage, and
During automatic hot water supply when the water temperature is low, such as during winter, when the signal from the hot water supply thermistor becomes lower than the hot water supply set hot water temperature and the hot water supply capacity is exceeded, the heating solenoid valve uses the signal from the control circuit. While simultaneously burning the heating burner, the pump is also rotated to open the additional heating temperature control valve to automatically supply hot water to the bath while circulating hot water in the bath heater, and, A hot water supply / room heating machine with a reheating function, configured to close the hot water supply flow rate control valve at an arbitrary set amount by the water supply detection element to stop automatic hot water supply.