JPH0723803B2 - Hot water supply / heater with additional heating function - Google Patents

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a hot-water supply / room heating machine with an additional heating function, which has functions of automatically supplying hot water to a bathtub and high-temperature hot water.

2. Description of the Related Art In recent years, a hot water heater with a reheating function has a hot water heater and a bath heater that is composed of an inter-exchanger provided in a hot water circulation passage for heating that circulates hot water by 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. 7 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 radiator 8 and a bath heater 9 connected to a bath 10 are branched and connected to the heating / hot water circulation passage by a connecting pipe 7.

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 from the original solenoid valve 16 to the hot water supply burner 19 through the hot water supply solenoid valve 17 and the proportional control valve 18, and the heating solenoid valve.
Each of them is connected to a heating burner 21 through 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 an additional heating thermistor 25 for detecting the circulating hot water temperature at the outlet of the heating heat exchanger 2.

The hot water supply pipe 26 is connected to the hot water supply port 1b through a hot water supply pipe 27 to, for example, a bathroom or a kitchen, and a hot water supply control valve 29 for automatically supplying hot water to the bathtub, a hopper 30, and a water level sensor for bath water.
An automatic hot water supply unit 28 having 31 is provided so as to branch from the hot water supply pipe 27 and 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. Meanwhile, the remote control 33
By operating a heating switch (not particularly shown) provided in the pump 3, when the water level switch 24 detects the make-up water stored in advance in the expansion tank 4, the pump 3 operates and the original solenoid valve 16,
The heating 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. In addition to being impossible, even if it could be installed on the wall side, there were problems such as a defect in appearance and aesthetics of the building.

In addition, when hot water is cooled during bathing, it is necessary to raise the bath water temperature by operating the heating switch, but there is a problem that it takes time to raise the temperature because the capacity of the heating burner is low. It was

Therefore, many people often drop hot water from the hot water supply (faucet) into the bathtub, but due to the high temperature, there were problems such as burns from the hot water supply (faucet) and 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 bath water heater (bath heater), or the like by a pump. A heating heat exchanger in a hot water circulation passage for circulating hot water, a proportional control valve connected in series with the original solenoid valve, and the proportional control valve for each of the hot water supply burner and the heating burner as seen in each heat exchanger. A solenoid valve for hot water supply and a solenoid valve for heating that are connected in a more branched manner, and provided at the outlet of the hot water supply heat exchanger, provided at the outlet of the hot water supply thermistor for detecting the hot water temperature and the heating heat exchanger, and the circulating hot water is provided. A heating thermistor for detecting the temperature, a hot water supply flow rate 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 a water supply passage of the hot water supply heat exchanger. , Water supply to calculate and measure water supply The proportional control valve is controlled by the water detection element and the signal of the hot water supply thermistor during the hot water supply operation, and by the signal of the heating thermistor during the heating operation and the reheating operation, to set the combustion amount of each burner. And a control circuit that controls so that during the automatic hot water supply operation, the control circuit opens the hot water supply flow rate control valve at a large flow rate, and the proportional control is performed by a control signal arithmetically processed by the signal of the hot water supply thermistor. Operate the valve to control the combustion amount of the hot water supply burner, and to the bathtub, the automatic hot water supply temperature (desired bath boiling temperature) at a large flow rate by the control signal (feedback) of the water supply detection element.
The hot tub is automatically heated so that the hot water supply is controlled by the control signal of the water supply detection element during the high temperature hot water operation. The control circuit is configured to supply high temperature hot water through the bathtub automatic hot water supply passage.

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.

Also, during simultaneous operation, the control circuit gives priority to the operation of the hot water supply mode to operate the proportional control valve to stably control the hot water temperature, while the heating side uses the signal from the heating thermistor to control the heating solenoid valve. Since the circulating hot water temperature can be controlled stably by controlling the opening and closing of the room, it is possible to control the room heating and the bath water temperature.

Further, during the automatic hot water supply operation, the hot water supply flow rate control valve is opened at a large flow rate to automatically supply a large flow rate 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 sent to the hot water supply thermistor signal. By operating the proportional control valve with the output processed by the control circuit to control the combustion amount of the hot water supply burner and automatically supply hot water to the bathtub, the bathtub hot water temperature is added to the desired bath boiling temperature. It can be completed only by automatic hot water supply operation without 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 automatic hot water supply function can be made inexpensive, and the installation can be made free, and the workability and aesthetics can be effectively achieved 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 radiator 8 and a bath heater 9 connected to a bath 10 are branched and connected to the heating / hot water circulation passage by a connecting pipe 7.

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 intake 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, a schematic diagram of the control circuit configuration of FIG. 2 will also be described.

During the hot water supply operation, the hot water supply thermistor 23 for detecting the temperature of the hot water supply hot water provided at the outlet of the hot water supply heat exchanger 1 and the hot water supply temperature setter 36 of the remote controller 33 are controlled so as to reach the hot water supply temperature. The comparator 37 of the circuit 32 performs a comparison operation and the operation processing unit
The proportional control valve drive unit 39 is operated by the output processed by 38 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 (hot water supply operation sequence ), The hot water supply operation control unit 42 is configured.

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 setting device 40 of the remote controller 33 are reached. As described above, the comparator 41 of the control circuit 32 performs a comparison operation, the proportional control valve drive unit 39 is operated by the output processed by the arithmetic processing unit 38, the proportional control operation 18 is operated, and the heating burner 21 is operated. The amount of combustion of water is controlled to stably control the circulating hot water to control the heating hot water temperature of the radiator 8 branched and connected to the connecting pipe 7 to heat the room, and the bath heater 9
The heating operation controller 43 controls the heating hot water circulating hot water for controlling the bath temperature by warming the water or hot water (tub water) stored in advance in the bathtub 10 (heating operation sequence). Are configured.

The hot water supply solenoid valve 17 and the heating solenoid valve 20 are configured with a hot water supply operation control unit 42 and a heating operation control unit 43 so as to open and close when controlling the respective hot water temperatures.

Further, during simultaneous operation, the hot water supply operation control unit of the control circuit 32
In the hot water supply mode preferentially at 42, the proportional control valve drive unit 39 is operated by the output processed by the calculation processing unit 38 to operate the proportional control valve 18 to stably control the hot water temperature, and the heating side is The heating operation control section 43 is configured to stably control the circulating hot water temperature (simultaneous operation sequence) by controlling the opening / closing of the heating solenoid valve 20 by the signal of the heating thermistor 25.

Further, during the automatic hot water supply operation, the hot water supply flow rate control valve 29 (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 (shown schematically in FIG. 4)) and a safety valve 34
A (vacuum breaker) is provided by branching from the hot water supply passage downstream of the hot water supply thermistor 23, and a bathtub automatic hot water supply passage is provided.
It is connected to the bathtub 10 through 35.

Then, by opening the hot water supply flow rate control valve 29 at a large flow rate in response to the signal from the hot water supply operation control unit 42, the signal from the hot water supply thermistor 23 and the automatic signal from the remote controller 33 are passed through the hot water supply heat exchanger 1. The comparator 37 of the control circuit 32 performs a comparative calculation so that the automatic hot water supply temperature set by the hot water supply hot water temperature setting device 44 is obtained, and the proportional control valve drive unit is operated by the output of the calculation processing unit 38. 39 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 supply temperature, and automatically supply hot water to the bathtub 10 at a large flow rate (automatic hot water supply operation sequence). Thus, the hot water supply operation control unit 42 is configured.

Also, during high temperature hot water operation, the hot water supply flow rate control valve 29 (which has a function of controlling a small flow rate and a large flow rate driven by a motor etc. and a valve closing function (shown schematically in FIG. 4) is automatically changed to a small flow rate. The temperature of the hot water is set to the hot water temperature set by the high-temperature hot water / hot water temperature setting device 45 (inside the remote control) of the remote controller 33 (for example, about 80 ° C.), and the temperature is automatically set. Through the hot water supply heat exchanger 1, the comparator 37 of the control circuit 32 performs a comparison operation so that the signal from the hot water supply thermistor 23 and the hot water temperature set by the high temperature hot water hot water temperature setting device 45 are reached. Then, the proportional control valve drive unit 39 is operated by the output processed by the arithmetic processing unit 38 to operate the proportional control valve 18, and the combustion amount of the hot water supply burner 19 is controlled to stabilize the hot water temperature. The hot water is controlled and heated to the bath 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 42.

Next, the hot water supply capability characteristic diagram of FIG. 3 and the drive hot water flow rate control valve schematic diagram of FIG. 4 will be described.

FIG. 3 is a characteristic diagram of hot water supply capability of the heat exchanger 1 for hot water supply. 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 44 (for example, about 42 ° C), the fourth
Comparator 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 46 in the figure (for example, about 10 / min)
The hot water supply flow rate control valve drive unit 49 is operated by the output calculated and compared by the calculation unit 47 (may be the same as the calculation processing unit 38), and the motor of the hot water supply flow rate control valve 29 is operated.
Drive 29a.

The gear 29d connected to the flow control valve shaft 29e is rotated in conjunction with the gear 29c provided on the motor shaft 29b. The flow control valve shaft 29e has a threaded portion 29f and has a control valve portion at the tip.
29g is provided with a spring 29h and is incorporated in the control valve body 29i. Since the control valve portion 29g 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 29j,
A large flow rate flows, and the automatic hot water supply flow rate is determined by the water supply detection element 22.
Is calculated and measured, and the hot water supply flow rate control valve 29 is configured to control the flow rate.

On the other hand, in the high temperature hot water operation (B), when the hot water supply temperature set by the high temperature hot water hot water temperature setting device 45 (for example, about 80 ° C.) is set by the high temperature hot water hot water flow setting device 50 in FIG. The comparator 47 of the control circuit 32 performs a comparison calculation so that the set hot water flow rate (for example, about 5 / min) is obtained, and the calculation processing unit 48 (which may be the same as the calculation processing unit 38) performs calculation processing. The hot water supply flow rate control valve drive unit 49 is operated with the output, the motor 29a of the hot water supply flow rate control valve 29 is driven, a small flow rate is caused to flow, and the hot water flow rate is calculated and measured by the water supply detection element 22, and the hot water supply is performed. The flow rate control valve 29 is configured to control the flow rate.

The operation of the above embodiment will be described with reference to the front view of the remote controller of FIG. 5 and the flowchart of FIG.

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 through the hot water supply pipe 27 is opened, for example, the operation shown in FIG. 6 is performed. The program starts. Automatic hot water supply in step 52? , Hot water in step 52? , Hot water supply in step 53? Is determined, and the hot water supply operation mode is set.

The water flowing through the water supply passage is measured in step 54 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 42 is configured so that the hot water supply operation sequence of step 55 operates. 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.
Hot water is discharged from 26.

The hot water temperature is detected by the hot water supply thermistor 23 and the remote control
In step 56 and step 57, the comparator 37 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 setter 36 of 33 becomes proportional, and the output processed by the calculation processing unit 38 is proportional. The control valve drive unit 39 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 temperature.

II. Heating Operation and Reheating Operation On the other hand, by operating the heating operation switch 33b provided on the remote controller 33, when the water level switch 24 detects the make-up water stored in advance in the expansion tank 4, the pump 3 operates and the hot water is heated. The heating operation control unit 43 is configured so that the circulating return hot water temperature is detected by the heating thermistor 25, and the heating operation sequence of step 58 operates, the exhaust fan 12 rotates, and the original solenoid valve 16, The proportional control valve 18 and the heating solenoid valve 20 are opened 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. The return hot water temperature is set to the heating hot water circulating temperature set by the signal from the heating thermistor 25 and the circulating hot water temperature setting device 40 (fixed inside the remote controller) of the remote controller 33, so that the step 59 and the step 60 are performed. Control circuit
The comparator 41 of 32 performs a comparison calculation, and the proportional control valve drive unit 39 is operated by the output processed by the calculation processing unit 38, 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 hot water supply operation When the automatic hot water supply operation switch 33c provided on the remote controller 33 is operated, the hot water supply flow rate control valve 29 is opened in step 61,
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 35.

When the signal of the water supply detection element 22 is measured in step 62 and the water supply is detected, the hot water supply operation control unit 42 is configured so that the automatic hot water supply operation sequence in step 63 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 (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 is automatically supplied to the bathtub 10 through the hot water supply flow control valve 29 and the bathtub automatic hot water supply passage 35. Step 64 and step 64 so that the automatic hot water supply flow rate set by the automatic hot water supply flow rate setting device 46 in FIG. 4 (for example, about 10 / min)
65, the comparator 47 of the control circuit 32 and the water supply detection element 22
The signal is compared and operated, and the hot water supply flow rate control valve drive unit 49 is operated by the output processed by the calculation processing unit 48 to control the hot water supply flow rate control valve 29 at a large flow rate for automatic hot water supply.
The hot water supply temperature is detected by the hot water supply thermistor 23 and the remote control
In step 66 and step 67, the comparator 37 of the control circuit 32 performs a comparative operation so that the hot water supply temperature (desired bath boiling temperature) set by the automatic hot water supply hot water temperature setting device 44 of 33 is reached, and the arithmetic processing unit Proportional control valve drive unit 39 with output processed in 38
Is operated to control the combustion amount of the hot water supply burner 19 by operating the proportional control valve 18 to stably control the hot water temperature and to automatically supply hot water to the bathtub 10 at a large flow rate.

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

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.

IV. High-temperature hot water operation When the high-temperature hot water operation mode is determined in step 52 by operating the high-temperature hot water operation switch 33d of the remote controller 33 when the water is cooled during bathing, the hot water supply flow rate is determined in step 68. The control valve 29 is opened, and the hot water heat exchanger 1
Hot water is poured into the bathtub 10 through the bathtub automatic hot water supply passage 35.

When the signal of the water supply detection element 22 is measured in step 69 and the water supply is detected, the hot water supply operation control unit 42 is configured so that the high temperature hot water operation sequence of step 70 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 (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 is poured into the bathtub 10 through the hot water supply flow rate control valve 29 and the bathtub automatic hot water supply passage 35. Fourth
In order to reach the high-temperature hot water flow rate set by the high-temperature hot water flow rate setting device 50 (for example, about 5 / min), the comparator 47 of the control circuit 32 and the water supply detection element 22 are controlled by steps 71 and 72. The signal is compared and calculated, and the hot water supply flow rate control valve drive unit 49 is operated by the output processed by the calculation processing unit 48 to control the hot water supply flow rate control valve 29 at a small flow rate, and the remote controller 33.
In order to reach the hot water temperature (for example, about 80 ° C) set by the high-temperature hot water hot water setter 45 (fixed inside the remote controller), the control circuit is controlled by step 73 and step 74.
The 32 comparators 37 perform a comparison calculation, and the proportional control valve drive unit 39 is operated by the output processed by the calculation processing unit 38 to operate 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, and the hot water can be supplied to the bathtub 10 at a small flow rate.

By controlling the hot water supply flow rate control valve 29 to a small flow rate and performing high-temperature hot water supply through the bathtub automatic hot water supply passage 35, 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, a radiator, a bath water heater (bath heater), and the like, and a former solenoid valve. And a proportional control valve connected in series to each of the hot water supply burner and heating burner, which are included in the heat exchanger, and a hot water supply solenoid valve and a heating solenoid valve branched and connected from the proportional control valve. , A hot water supply thermistor provided at the outlet of the hot water supply heat exchanger to detect the hot water supply hot water temperature, and a heating thermistor provided at the outlet of the heating heat exchanger to detect 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 hot water supply during hot water supply operation For thermistor And a control circuit for controlling the proportional control valve by the signal of the heating thermistor during heating operation and additional heating operation to control the combustion amount of each burner to the set hot water temperature. During the hot water supply operation, the control circuit opens the hot water supply flow rate control valve at a large flow rate, and operates the proportional control valve according to the control signal calculated by the signal of the hot water supply thermistor to change the combustion amount of the hot water supply burner. The bath water is automatically controlled by the control signal (feedback) of the water supply detection element to the bathtub so that the temperature of the hot water is high (the desired bath heating temperature) at a large flow rate, and the hot water supply operation is performed without the additional heating operation. In addition to the above, the hot water supply hot water is supplied through the bathtub automatic hot water supply passage by controlling the hot water supply flow rate control valve to a small flow rate by the control signal of the water supply detection element during high temperature hot water supply operation. It has the following effects by configuring the control circuit so.

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

(2) Since the bathtub automatic hot water supply function and the bathtub automatic high temperature hot water supply function are built in the main body, the cost is low and
Not only can it be installed freely to improve workability, but it does not impair 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 hot water can be supplied automatically with the lid of the bathtub kept open, there is no need to sprinkle hot water, energy can be saved, and it is economical.

(5) The desired bath boiling temperature can be obtained by controlling the hot water supply flow rate control valve provided in the bathtub automatic hot water supply passage to a large flow rate to automatically supply hot water to the bathtub while collecting hot water using the hot water supply device (end device). Since it can be completed only by the automatic hot water supply operation without the additional heating operation as in the past, the bath boiling time is shortened by that much, so it is economical and the bath can be used comfortably .

(6) If the control circuit is configured with a function that automatically sets the amount of hot water supplied to the bathtub by automatically setting a timer or the like during automatic hot water supply, automatic hot water supply to the bathtub can also be stopped and the water level in the bathtub can be changed. A method that does not require a water level sensor for detecting is also conceivable.

(7) When there is residual hot water at a temperature lower than the specified temperature in the bathtub, or when the bath is cooled during bathing, the hot water supply flow rate control valve provided in the bathtub automatic hot water supply passage is controlled to a small flow rate to supply high temperature hot water. Since it can be controlled by the hot water supply burner having a large capacity by performing the hot water supply passage through the bathtub automatic hot water supply passage, it is possible to raise the temperature in a short time and there is no risk of burns because high temperature hot water is not supplied from the hot water supply cullan.

(8) By freely selecting and controlling the automatic hot water supply function, the automatic high-temperature hot water supply function, and the additional heating function, an economically comfortable bath life can be achieved.

(9) Since it has a heating function, you can comfortably activate the bath in a warm and healthy manner while heating the bathroom, washroom, dressing room, etc. in the winter and at a certain temperature in the bathtub. If there is remaining hot water at a lower temperature or if the water is cooled during bathing, you can raise the bath water temperature in a short time by using additional heating with a bath water heater (bath heater) and hot water supply. Can be heated.

[Brief description of drawings]

FIG. 1 is a schematic configuration diagram of a water heater with additional heating function showing an embodiment of the present invention, FIG. 2 is a schematic configuration diagram of the control circuit, FIG. 3 is a characteristic diagram of hot water supply capability, and FIG. FIG. 5 is a schematic view of the driving of the hot water supply flow rate control valve, FIG. 5 is a front view of the remote controller, FIG. 6 is a flowchart, and FIG. 7 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, 29 ...... Hot water flow control valve, 32 ......
Control circuit, 33 ...... remote control, 35 ...... bathtub automatic hot water supply passage.

Claims (1)

[Claims] 1. A proportional control connected in series with a heat exchanger for heating a hot water circulation passage connected to a heat exchanger for hot water supply, a radiator, a bath water heater (bath heater), etc. and circulating hot water with a pump, and an original solenoid valve. A valve, a hot water supply burner and a heating burner that are desired for each heat exchanger, and a hot water supply solenoid valve and a heating solenoid valve branched and connected from the proportional control valve, and the hot water supply heat exchange. Provided at the outlet of the heater, provided at the outlet of the hot water supply thermistor for detecting the hot water supply hot water temperature and the heating heat exchanger, and a heating thermistor for detecting the circulating hot water temperature, branched from the hot water supply passage downstream of the hot water supply thermistor, A hot water supply flow rate control valve provided in the bathtub automatic hot water supply passage connected to the bathtub, a water supply detection element that is provided in the water supply passage of the hot water supply heat exchanger to calculate and measure the amount of water supply, and a signal from the hot water supply thermistor during hot water supply operation , Also warm By controlling the proportional control valve by a signal of the thermistor for the heating during operation and Tsui焚 operation,
A control circuit for controlling the combustion amount of each burner to reach the set hot water temperature, and during automatic hot water supply operation, the control circuit opens the hot water supply flow rate control valve at a large flow rate, and calculates by the signal of the hot water supply thermistor. The proportional control valve is operated by the processed control signal to control the combustion amount of the hot water supply burner to the bathtub and the control signal (feedback) of the water supply detection element.
The automatic hot water supply to the hot water at a large flow rate (desired bath boiling temperature) will be completed by the automatic hot water supply operation without the additional heating operation. A hot water supply / room heating machine with a reheating function, wherein the control circuit is configured to control the hot water supply flow rate control valve to a small flow rate by a control signal to perform hot hot water supply through the bathtub automatic hot water supply passage.