JPH07113460B2 - Bath water heater - Google Patents

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a bath water heater having an automatic hot water supply function for automatically supplying hot water to a bathtub.

2. Description of the Related Art Conventionally, in this type of bath water heater, a pouring means for pouring hot water into a bathtub and a hot water feeding means for using hot water are each independently configured. That is, in FIG. 2, when the hot water tap 1 is opened during hot water supply operation, water flows in from the water supply connection port 2, and when the water amount detector 3 reaches the ignition water amount, control means (not shown) that receives this signal. Opens the gas solenoid valve 4 and the gas control valve 5 to ignite the hot water supply burner 6. The hot water heated in the hot water supply heat exchanger 7 is supplied from the hot water tap 1 through the hot water supply passage 8, the water amount controller 23, and the hot water supply connection port 9. Here, the control means controls the gas control valve 5 and the water amount controller 23 so that the set temperature of the water heater is reached, and the hot water is supplied at the set temperature.

Next, at the time of the automatic hot water supply operation to the bathtub 19, the automatic hot water supply opening / closing valve 10 becomes "open" by closing the automatic hot water supply switch, and the water flowing in from the water supply connection port 2 exchanges heat for hot water supply as in the hot water supply operation. It is heated in vessel 7. The heated hot water is supplied from the automatic hot water supply passage 11 through the automatic hot water supply on-off valve 10 into the tank 12 for cutting off the connection with the water supply. Here, the control means switches the three-way valve 13 to the tank 12 side, and the pump 14
The hot water in the tank 12 is supplied to the bathtub 19 through the water flow switch 15, the reheating heat exchanger 16, the outflow pipe 17, and the bathtub adapter 18. The water level in the tank 12 is controlled by the ball tap 20 so as to be maintained at a constant level. Reference numeral 21 is a return pipe, and 22 is an exterior case.

SUMMARY OF THE INVENTION However, with the above-mentioned configuration, use of hot water supply,
And when they are used independently in the automatic hot water beam operation, they exert their respective functions, but when using both hot water supply operations at the same time,
Since the hot water is supplied to both the hot water supply side and the automatic hot water beam side, the amount of hot water supply becomes unbalanced, and when the amount of hot water on the automatic hot water filling side is small, the predetermined water surface level was maintained even when the ball tap 20 was fully opened. Therefore, the pump 14 has a problem that it is operated in the air-blown state. Also on the hot water supply side, the shower, which requires a large amount of hot water, could not be used at the same time, which was inconvenient and inconvenient. In addition, since the hot water temperature at the time of simultaneous use is generally given priority to the hot water temperature of the automatic hot water filling, the desired hot water temperature cannot be obtained even when using the hot water supply / shower. However, there is a problem that the configuration is complicated and the configuration is complicated.

In view of the above problems, the present invention controls the hot water supply control valve so that the hot water supply amount and the hot water supply temperature can reach the hot water supply set temperature and the hot water supply capacity limit, and when the use of the hot water supply is stopped, the automatic hot water operation is performed. At the hot water temperature of the hot water, the water volume control valve is controlled so that the water level in the tank becomes a predetermined level, and it switches to the automatic hot water hot water condition for the bathtub, improving the usability, comfort and pump durability. In addition to the above, it is intended to reduce the noise caused by air spillage into the pump.

Therefore, the technical means of the present invention to solve the above problems, an automatic hot water beam switch for turning on and off the automatic hot water beam to the bathtub, and an input detection means for detecting an input to the water heater. , A water level detector that detects the water level in the tank for edging provided between the water heater and the automatic hot water beam piping circuit, a hot water supply detector that detects that hot water is being supplied from the water heater to the hot water supply pipe, and the input Input signal from the detection means and the water level detector, the water level signal is input, a water amount controller for controlling the amount of water entering the water heater, and the automatic hot water beam switch is on, and the hot water supply detector is off, The pouring control means that controls the pouring of water into the bathtub by controlling the water volume controller so that the water level in the tank reaches a predetermined level by the signal from the water level detector, and the automatic hot water beam switch is turned on and hot water is used. When the detector is on If
The hot water pouring control means is put on hold, the signal of the input detection means is input so that the hot water supply use condition (set temperature) is reached, and the water volume controller is controlled to obtain the set hot water temperature within the range of the hot water supply capacity It is equipped with a hot water supply means for controlling the amount of water.

Action The action of this technical means is as follows. That is, when the automatic hot water beam switch is on and the hot water supply detector is off, the water level control valve is controlled by the water level signal from the tank water level detector for pouring hot water into the bathtub, The amount of water input can be adjusted to match the amount of pump transport. When the hot water supply detector is on, the automatic hot water beam is put on standby, and a signal from the input means for hot water supply is input to operate the hot water supply condition.

As a result, the water level of the tank can be maintained at a predetermined level when hot water is poured into the bathtub, eliminating air from the pump, improving durability and reducing noise, and reducing the amount of hot water required when using hot water. Since it is obtained and the hot water temperature for hot water supply can be used at the set hot water temperature, a comfortable shower can be used. Since the water amount controller can also be used, the structure can be simplified.

Embodiment An embodiment of the present invention will be described below with reference to the drawings. The same parts as those of the conventional example are designated by the same reference numerals, detailed description thereof will be omitted, and different parts will be mainly described.

In FIG. 1, reference numeral 24 is a water level detector for detecting the water level in the tank 12, and in this embodiment, a low switch 24a for detecting a "low" water level and a high switch 24b for detecting a high water level are respectively provided. When the water level rises, an "ON" signal is output, and when the water level decreases, an "OFF" signal is output. 25 is a water amount sensor that detects the amount of water, 26 is a temperature detection sensor (thermistor) that detects the temperature of incoming water, and 27 is the amount of water within the output (capacity) range of the water heater by comparing and calculating the incoming water temperature and the set hot water temperature. Is an input detection means configured to output as an output signal. Reference numeral 28 denotes a water amount controller for controlling the water amount, which inputs a signal from the water amount sensor 25 to increase or decrease the water amount.
In addition, the signal of the water level detector 24 is input to increase / decrease the amount of water.
The water level in tank 12 is switched by increasing or decreasing by a certain amount.
Control so that it is between 24a and 24b. Reference numeral 29 is a hot water supply detector that detects hot water use when the hot water supply amount exceeds a certain flow rate by opening the hot water tap 1. Reference numeral 30 is a control means that forms part of the automatic hot water pouring control means and the hot water supply control means that supplies hot water from the hot water tap 1, and as shown by the dotted line in FIG. 1, the gas solenoid valve 4, the gas control valve 5, and the automatic hot water supply opening / closing. Valve 10, water level detector 24,
It is connected to the water amount sensor 25, the water amount controller 28, the hot water supply detector 29, the three-way valve 13, and the pump 14. And the control means 30
Incorporates the input detection means 27 and constitutes a part of the hot water supply control means. 31 is an automatic hot water beam switch.

In the above embodiment, when the hot water tap 1 is opened, the water supply connection port 2
More water enters and the water amount sensor 25 detects this and sends a signal to the controller means 30, which opens the gas solenoid valve 4 and the gas control valve 5 to ignite the hot water supply burner 6. The hot water heated by the hot water supply heat exchanger 7 is supplied from the hot water tap 1 through the hot water supply passage 8 and the hot water supply usage detector 29. Then, the control means 30 controls the gas amount control valve 5 and the water amount controller 28 so as to reach the hot water supply set temperature.

Further, when the hot water is automatically poured into the bathtub 19, the following is done.
That is, when the automatic hot water beam switch 31 is closed and the hot water supply detector 29 is off, the automatic hot water supply opening / closing valve 10 is opened by the control means 30. And water supply connection port 2
The inflowing water flows to the water amount sensor 25, the water amount controller 28, the hot water supply heat exchanger 7, the automatic hot water supply on-off valve 10, the tank 12,
The gas control valve 5 is controlled by the control means 30 so that the temperature is set by an automatic hot water beam temperature setting device (not shown), and the hot water supply burner 6 is burned by the amount of gas and heated by the hot water supply heat exchanger 7. To be done. The water amount controller 28 supplies hot water at a constant flow rate at the start of operation. Then, the control means 30 simultaneously switches the three-way valve 13 to the tank 12 side and the pump 14 is operated, and the hot water in the tank 12 is switched to the water flow switch 15 and the heat exchanger for reheating.
16, transfer to the bathtub 19 through the outflow pipe 17, the bathtub adapter 18. The water level in the tank 12 depends on the transfer amount of the pump 14 and the outflow pipe.
As it moves up and down depending on the length of 17 and the amount of hot water supplied to the tank 12,
The control means 30, which receives the signal from the water level detector 24 so as to balance between the high and low switches 24a and 24b, controls the water amount controller 28 to perform pouring into the bathtub 19.

In the above operating state, when the hot water tap 1 is opened, the hot water tap 1
The hot water supply detector 29 is turned on, the control means 30 receiving this signal closes the automatic hot water supply on-off valve 10, and the pouring into the bathtub 19 is in a waiting state. The water temperature data detected by the temperature detection sensor 26 and the water amount detected by the water amount sensor 25 are control means for the usage conditions (hot water / hot water amount) of hot water supply.
It is input to the input detection means 27 of 30, and a comparison operation is performed to see if it is within the output (capacity) range of the water heater. If it is within the output range, no output signal is output to the water volume controller 28 In this case, an output signal is output to the water amount controller 28 to reduce the water amount, the water amount is adjusted, and control is performed so that the hot water supply set temperature is obtained.

Effects of the Invention As described above, the present invention is capable of pouring hot water into a bathtub at a set hot water temperature and controlling the water level in the tank with a water amount controller to generate air bleeding in the pump. Can be prevented, and durability and noise can be reduced.

In addition, even during automatic hot water filling, you can adjust the desired hot water temperature just by using the hot water heater by simply opening the hot water tap, and you can get the hot water amount within the output range of the water heater, which is comfortable. You can use a nice shower.

Further, since one water quantity controller can be used both when the hot water is supplied and when the hot water is used, the structure can be simplified.

[Brief description of drawings]

FIG. 1 is an overall configuration diagram of a bath water heater in one embodiment of the present invention, and FIG. 2 is an overall configuration diagram of a conventional bath water heater. 7: Hot water supply heat exchanger, 8: Hot water supply water flow section, 10: Automatic hot water supply opening / closing valve, 11: Automatic hot water supply water flow section, 12: Tank, 14 ...
… Pump, 24 …… Water level detector, 25 …… Water quantity sensor, 26
...... Temperature detection sensor, 27 …… Input detection means, 28 …… Water volume controller, 29 …… Hot water supply detector, 30 …… Control means, 31
...... Automatic hot water beam switch.

Claims (1)

[Claims] 1. An automatic hot water beam switch for turning on / off an automatic hot water supply on / off valve for automatically hot watering a bathtub, an input detecting means for detecting an input to the hot water supply device based on a water temperature / amount of water supplied to the hot water supply device, and a hot water supply device. Water level detector that detects the water level in the rimming tank provided in the pouring path from the water heater to the bathtub, and a hot water supply detector that detects that hot water is being supplied from the water heater to the hot water tap, and the input Input signal from the detection means and the water level detector, the water level signal is input to control the amount of water entering the water heater and the water level when the automatic hot water beam switch is on and the hot water supply detector is off. The pouring control means that controls the pouring of water into the bathtub by controlling the water volume controller so that the water level in the tank reaches a predetermined level by the signal from the detector, and the automatic hot water beam switch is on If the vessel is on, turn on the pouring control means. And a hot water supply control means for controlling the water quantity control device by inputting the signal from the input detection means so that the hot water supply condition is met and controlling the water quantity controller to obtain the set hot water temperature within the capacity range of the water heater. Bath water heater.