JPS63153362A - Controller for hot-water supplier - Google Patents

Abstract

PURPOSE:To permit the supply of the maximum amount of hot-water, having a set temperature, within the capacity of a hot water supplier, by a method wherein the title controller is provided with a supplying heat amount controller driving means, driving a supplying heat amount controller by signals from a supplying hot-water temperature setter and a water temperature detector, and a water amount controller driving means, driving a water amount controller by signals from the water temperature detector, a water amount detector and the supplying hot-water temperature setter. CONSTITUTION:A desired temperature is set by the automatic feed hot-water temperature setting knob 16 of a bath controller 12 and a hot-water supplying amount is regulated by an automatic hot-water supplying amount setting knob 17, then, an automatic hot-water supplying switch 13 is put ON. Water is supplied from a water inlet port and the amount of water is converted into a pulse signal by a water amount sensor 1 while a hot-water supplying amount is integrated by a control unit 24. Thereafter, the amount of water is controlled to a given amount by a constant water amount valve 2 and the water absorbs heat in a heat exchanger 3 whereby the water becomes hot-water. An output hot-water temperature is controlled by detecting an input water temperature by a thermistor 18 at first and the output hot-water temperature by the thermistor 19. The detected signals are sent into the control unit 24 together with the signal of the automatic supplying hot-water temperature setting knob 16 to drive a gas proportional valve 7 by employing a gas proportional valve driving means 22, operated by these three signals, whereby the amount of supplying gas may be regulated so as to obtain the set hot-water temperature.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a control device for a water heater that supplies hot water for bathing or the like.

Conventional technology As an example of the conventional technology, a gas instantaneous water heater will be explained.

In Fig. 4, water is supplied from a water inlet, passes through a water quantity sensor 1 which is a water quantity detection device, passes through a constant water quantity valve 2, absorbs heat in a heat exchanger 3, and is supplied from a hot water supply port 4 or a bath water supply port 5. . Gas is supplied from the gas inlet, passed from the gas solenoid valve 6 to the gas proportional valve 7, which is a supply heat amount control device, and then to the burner 8.
burns and generates heat. Further, combustion gas generated by combustion is discharged by a combustion blower 9.

When hot water is supplied from the hot water supply port 4, a thermistor 10 serving as a hot water temperature detection device detects the hot water temperature so that the temperature reaches a preset temperature (for example, 60°C), and sends a signal to the control device 11. The gas proportional valve 7 is driven so that the set temperature is reached, and the supplied gas amount is changed to change the hot water temperature.

In addition, when supplying hot water to the bath, the automatic hot water supply switch 13 of the Furu controller 12, which is a hot water supply temperature setting device, turns on the hot water supply switch 14, and the water flow proportional valve, which is a water volume control device, is activated via the control device 11. 15 is operated, and hot water is supplied from the bath water supply port 5. The temperature and amount of hot water to be supplied to the bathtub can be set using an automatic hot water supply temperature setting knob 16 and an automatic hot water supply amount setting knob 17.

Problems to be Solved by the Invention However, in the conventional configuration, for example, 30,0OOKcae/
In a water heater with a gas consumption of
This will cause water to flow in. It is sufficient if the water temperature is 5°C, but if the water temperature rises, the gas proportional valve 7 is throttled to reduce the supplied gas amount to obtain hot water of 80'C, while keeping the water volume unchanged.

Therefore, even if you want more hot water, you may not be using the water heater's full capacity.

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, it is an object of the present invention to provide a water heater control device that can detect the temperature of incoming water and supply the maximum amount of hot water at a set temperature within its capacity.

Means for Solving the Problems In order to achieve the above object, the water heater control device of the present invention includes a hot water temperature setting device that can arbitrarily set the hot water temperature, and a water temperature detection device provided upstream and downstream of the heat exchanger. a supply heat amount control device that supplies heat to a heat exchanger; a water amount control device that controls the amount of water flowing through the heat exchanger; a water amount detection device that detects the amount of water flowing through the heat exchanger; supply heat amount control device driving means for driving the supply heat amount control device using a signal from a setting device and a signal from a water temperature detection device; a signal from the water temperature detection device, a signal from the water amount detection device; and the hot water supply temperature setting. The structure includes a water amount control device driving means for driving the water amount control device using a signal from the device and a signal from the supply heat amount control device.

Operation The present invention uses the supply heat amount control device driving means to drive the supply heat amount control device based on the temperature signal set by the hot water supply temperature setting device and the incoming water temperature signal detected by the water temperature detection device with the above-described configuration. Get hot water.

Furthermore, after the water temperature detection device detects the temperature set by the hot water temperature setting device, a signal from the water temperature detection device, a signal from the water amount detection device, a signal from the hot water temperature setting device, and a supply heat amount control are transmitted. Drive the water amount control device so as to always make maximum use of the supplied heat amount control device by using the water amount control device driving means with a signal from the device;
This allows you to obtain hot water at the set temperature to the maximum capacity.

Embodiment FIG. 1 is a configuration diagram showing an embodiment of the present invention. 1st
In the figure, the water passage continues from upstream to a water flow sensor 1, which is a water flow detection device, a constant water flow valve 2, a heat exchanger 3, and ends at a hot water supply port 4 of a hot water supply circuit 4a or a bath water supply port 5 of a bath water supply circuit 5a. A thermistor A18 and a thermistor B19, which are water temperature detection devices, are provided immediately after the upstream of the water amount sensor 1 and immediately after the downstream outlet of the heat exchanger 3. The gas passage is provided with a gas electromagnetic valve 6, a gas proportional valve 7, which is a supply heat amount adjustment device, and a burner 8, from the upstream side.

Further, the hot water supply circuit 5a to the bathtub 20 is provided with a water amount ratio side 15 which is a water amount control device. Heat exchanger 3 has
A combustion blower 9 is provided.

The Furu controller 12 includes an automatic hot water temperature setting knob 16 and an automatic hot water supply amount setting knob 1 as a hot water temperature setting device.
6. Automatic hot water supply switch 1a and high temperature hot water switch 1
4 is provided. This full controller 12 is
Water flow control device driving means 21 that drives the water volume proportional valve 16
, is connected to a control device 24 comprising a gas proportional valve drive means 22 which is a supply heat amount control means for driving the gas proportional valve 7 and other control sections 23.

When hot water is supplied from the hot water supply port 4, water is supplied from the water inlet, converted into a pulse signal by the water flow sensor 1, and the flow of water is detected by the control device 24. After that, the water amount becomes constant with the constant water amount valve 2, and heat is absorbed with the heat exchanger 3, resulting in hot water. The outlet water temperature is determined by thermistor A113, the incoming water temperature, and thermistor B1.
The hot water temperature is detected at 9 and adjusted by driving the gas proportional valve 7 to a preset temperature (for example, 60°C) using the gas proportional valve driving means 22 of the control device 24. Supplied.

When hot water is supplied via the bath hot water supply circuit 5af4, set the desired temperature with the automatic hot water supply temperature setting knob 16 of the Furu controller 12, adjust the amount of hot water supply with the automatic hot water supply amount setting knob 17, and turn on the automatic hot water supply switch 13. Make it. Water is then supplied from the water inlet, converted by the water flow sensor 1 into a Parnu signal proportional to the water flow, and the control device 24 integrates the amount of hot water supplied.

After that, the water amount becomes constant with the constant water amount valve 2, and heat is absorbed with the heat exchanger 3 to become hot water. To control the hot water temperature, first, the thermistor A1B detects the incoming water temperature t, and the thermia 5B19 detects the hot water temperature. The detected signal is sent to the control device 24 together with the signal from the automatic hot water temperature setting knob 16 of the Furu controller 12, and the gas proportional valve 7 is driven using the gas proportional valve driving means 22 using the above three signals. , adjust the amount of gas supplied so that the set temperature is achieved. Here, when the hot water temperature detected by the thermistor 819 becomes the same as the temperature set by the automatic hot water supply temperature setting knob 16, the thermistor A18, thermistor B19, the gas proportional valve driving means 22, the water flow sensor 1, and the automatic hot water supply temperature setting knob Each of the 16 signals is controlled by the control device 2.
4 is read, the water volume proportional valve 15 is operated using the water volume control means 21 so that the signal of the gas proportional valve driving means 22 is always at the maximum, and the capacity is always used to the maximum to obtain as much hot water as possible. It is something.

If you want especially hot water from the hot water circuit 5a,
Turn on the high temperature switch 14 of the Furu controller 12.
Make it. The temperature control thereafter is the same as in the case of automatic hot water supply described above.

FIG. 2 shows an example of gas proportional valve drive means 22, which is an example of supply heat amount control means.

The voltages of the temperature setting volume 25, thermistor A18 and thermistor B19 are sent to the microcomputer 28 via the analog multiplexer 26 and the A/D converter 27. The microcomputer 28 is a CP
U, ROM% RAM.

The thermistor A18 is composed of 110 parts.
, reads the voltage of thermistor B19, calculates it so that the voltage of temperature setting volume 25 and thermistor B19 are equal, and outputs the output from section 110 through the D/A converter 29, which is amplified by operational amplifier 30 and transistors 31 and 32, and then connected to gas proportional valve 7. It is what drives the.

FIG. 3 is a configuration diagram of a drive circuit for the water volume proportional valve 15 as an example of the water volume control device drive means 21.

The temperature setting volume 25, thermistor A18, thermistor B19, and the Varne signals from the water sensor 1 are converted into voltages by the F/V converter 34, and each voltage is sent to the microcomputer 28 from the A/D converter 27 through the analog multiplexer 26. In addition, the gas proportional valve drive output of the microcomputer 28 is also connected to the D/A converter A.
35 to the analog multiplexer 26 and input into the microcomputer 28 again. Here, the arithmetic function of the microcomputer 28 causes the gas proportional valve drive output to be maximized from the 110 unit, and operates the water volume proportional valve 15 through the D/A converter B36.

With the configuration of the above embodiment, the capacity of the water heater can be used to the maximum extent to provide the necessary hot water.

More than the effects of the invention, as is clear from the examples, the present invention provides a hot water supply temperature setting device that can arbitrarily set the hot water temperature, a water temperature detection device provided upstream and downstream of a heat exchanger, and a supply of heat to the heat exchanger. a water amount detection device that detects the amount of water flowing into the heat exchanger; and a supply heat amount control that drives the supply heat amount control device using a signal from the hot water temperature setting device and a signal from the water temperature detection device. device driving means; water amount control device driving means for driving the water amount control device using a signal from the water temperature detection device, a signal from the water amount detection device, a signal from the hot water supply temperature setting device, and a signal from the supply heat amount control device; Because it is equipped with this feature, it is possible to obtain the maximum amount of hot water within its capacity.

[Brief explanation of the drawing]

FIG. 1 is a configuration diagram of a water heater showing an embodiment of the present invention;
FIG. 2 is a block diagram of the gas proportional valve drive means, FIG. 3 is a block diagram of the water proportional valve drive circuit, and FIG. 4 is a conventional block diagram. 1...Water amount sensor (water amount detection device), 7...
...Gas proportional valve (supply heat amount control device), 16...
...Water flow proportional valve (water flow control device), 16...Automatic hot water supply temperature setting knob (water supply temperature setting device), 18..
...Thermistor A (water temperature detection device), 19...
...Thermistor B (water temperature detection device), 21...
Water quantity control device drive means, 22... Gas proportional valve drive means (supply heat amount control device). Name of agent: Patent attorney Toshio Nakao and 1 other person No. 1
Figure 2 Figure 3

Claims (1)

[Claims] A hot water supply temperature setting device that can arbitrarily set the hot water temperature, a water temperature detection device provided upstream and downstream of the heat exchanger, a supply heat amount control device that supplies heat to the heat exchanger, and a water supply temperature control device that controls the amount of water flowing to the heat exchanger. A water quantity control device to be controlled, a water quantity detection device which detects the quantity of water flowing through the heat exchanger, a supply heat amount control which drives the supply heat quantity control device using a signal from the hot water supply temperature setting device and a signal from the water temperature detection device. device driving means; a water flow control device drive for driving the water flow control device using a signal from the water temperature detection device, a signal from the water flow detection device, a signal from the hot water supply temperature setting device, and a signal from the supply heat amount control device; Water heater control device with means.