JPH02290441A - Hot water supplying apparatus - Google Patents

Abstract

PURPOSE:To prevent a danger of supplying high temperature hot water and to simplify an operation by reversely controlling the operating direction of a proportional control valve if the temperature relationship between passages 1 and 2 connected to the valve for regulating the flowrate ratio of high and low temperature hot waters is reversed. CONSTITUTION:If signals of a temperature setter 22 and an intermediate temperature detector 20 are compared by a control circuit 23 and the latter temperature is high, the heating of an instantaneous hot water heating and supplying apparatus 8 is stopped, cold water is merely passed, the flowrate ratio of an intermediate temperature hot water passage 7 and a passage 9 is regulated by a ratio control valve 10, and the circuit 23 is so operated that the temperature of an output hot water temperature detector 21 coincides with a set temperature. If the temperature of the detector 20 is low, the apparatus 8 is heated to regulate ths heating amount by a proportional control valve 18 to become the set temperature. The hot water temperature supplied to the valve 10 via the passage 9 becomes predetermined high temperature irrespective of the flow rate, and the valve 10 regulates the flowrate ratio to become the set temperature. As described above, the operation is simple and a danger of supplying high temperature hot water can be prevented.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a water heater equipped with a ratio control valve that mixes high-temperature water and low-temperature water to obtain an appropriate temperature. Conventional technology Water heaters that use solar heat or waste heat as a heat source cannot provide hot water at a stable temperature due to the nature of the heat source, so they are used in combination with other heat sources. Efforts have been made to supply hot water at a wide range of temperatures from high to low, and at a stable temperature. Figure 4 shows a conventional example. In FIG. 4, a solar water heater 101 is supplemented with a hot water storage boiler 102, and a medium-temperature water supply path 103 from the water heater 101 and a boiler 1
Branch path 1 branched from the high temperature water supply path 104 of 02
05 is led to a constant temperature mixing valve 106, mixed to a predetermined temperature, and exits through a path 107. On the other hand, the water circuit 108 also connects the high temperature water supply path 104 and the path 1.
07 and is led to a mixing faucet 109. Mixing faucet 109
faucets 110 and 111 for opening and closing each channel;
112 are provided, and they meet at a hot water outlet 113. In this conventional example, faucets 110, 111, 1
12 opening/closing combinations, it is possible to discharge hot water in the entire temperature range from the boiler's high temperature to cold water.In particular, the constant temperature mixing valve 106 allows the solar water heater 10 to
Priority is given to hot water from 1, and the temperature is mixing) <Lube 1
When the temperature falls below the set temperature of 06, hot water from the boiler 102 is mixed and used, increasing the solar heat utilization rate and saving energy.

Problems to be Solved by the Invention However, the configuration of this conventional example is not easy to use because it is necessary to operate three faucets to obtain a desired temperature.

In addition, if the hot water heated by the solar water heater 101 exceeds the set temperature of the hot water storage boiler 102 during the summer, the user may open the water faucet 111 without noticing it and assume that the temperature is medium temperature. There were issues such as the fact that hot water was being supplied at a much higher temperature, which was dangerous.

The present invention aims to solve these problems and provide a water heater that is easy to operate and can be used safely.

Means for Solving the Problems In order to achieve the above objects, the water heater of the present invention includes a ratio control valve that adjusts the flow rate ratio of high-temperature water and low-temperature water, and an electric drive means that drives the ratio control valve. , paths 1 and 2 connected to the ratio control valve, a temperature setting device that specifies the mixing temperature, a hot water temperature detector that detects the mixing temperature, and a temperature sensor that detects the mixing temperature according to the deviation between the signals of the temperature setting device and the hot water temperature sensor. The ratio control valve is configured to include a controller that controls the electric drive means and reverses the operating direction of the ratio control valve when the temperature relationship between paths 1 and 2 is reversed.

Operation With the above-described configuration, the water heater of the present invention is such that when the temperature relationship between path 1 and path 2 is reversed, the electric drive means is controlled by the controller, and the operating direction of the ratio control valve is automatically reversed. This prevents the danger of being supplied with hot water and simplifies operation.

EXAMPLES Hereinafter, examples of the present invention will be described in detail with reference to FIGS. 1, 2, and 3. Figure 1 shows an example of using a medium-temperature water heater 1 that uses solar heat.
The figure shows a type in which a heat medium is circulated between a heat exchanger 4 in a hot water storage tank 3 and a heat exchanger 4 in a hot water storage tank 3 using a circulation pump 5. The water supply channel 6 is branched into a medium-temperature water channel 7, which is a route 1 passing through the hot water storage tank 3, and a route 9, which is a route 2 passing through the instantaneous heating water heater 8.The water supply channel 6 is branched into a route 9, which is a route 2 passing through the instantaneous heating water heater 8. do. In the instant hot water heater 8, a flow rate detector 12, a heat exchanger l3, and a thermistor l4 are arranged from the upstream side of the path 9, and a solenoid valve 17 and a proportional control valve 18 are installed in the gas supply path 15 up to the burner 16. It also has a built-in controller 19 that controls combustion. On the other hand, the hot water storage tank 3 of the medium temperature water heater 1 is provided with a medium temperature detector 20 for detecting temperature, and the hot water outlet path 11 is provided with a hot water temperature detector 21. These temperature signals are sent to a temperature setting device 22 provided near the hot water supply terminal.
It is sent to the control circuit unit 23 together with the setting signal, and controls the operation of the ratio control well 10 and the instantaneous hot water heater 8 described above.

Next, to explain the operation, the control circuit 23 compares the signal of the temperature setting device 22 and the signal of the intermediate temperature detector 20, and if the temperature of the intermediate temperature detector 20 is higher, the instantaneous heating water heater 8 A heating stop command is issued to the controller 19, the cold water is simply passed through, and the ratio control valve 10
The control circuit 23 operates by adjusting the flow rate ratio of the intermediate temperature waterway 7 and the path 9 so that the temperature signal of the outlet hot water temperature detector 2l coincides with the set temperature signal. Next, if the temperature of the medium temperature detector 20 is lower, a command is given to the controller 19 to heat the instant hot water heater 8. In the instant hot water heater 8, when the flow rate detector 12 detects that water is flowing, the controller 19 opens the solenoid valve 17 to ignite the burner 16, and proportionally adjusts the temperature signal from the thermistor 14 to a predetermined temperature. A control well 18 adjusts the amount of heating. That is, the temperature of the hot water supplied to the ratio control well 10 through the path 9 is a substantially constant high temperature regardless of the flow rate. As described above, the ratio control well 10 operates to adjust the respective flow rate ratios so that the set temperature is achieved.

The instant heating water heater 8 used in this embodiment can be realized by using a gas water heater that performs combustion amount proportional control to keep the hot water temperature constant, and by receiving power from the control circuit section 23, so it can be realized using a dedicated heat source. It has the advantage of not requiring Furthermore, by changing the temperature setting level of the thermistor 14 in relation to the temperature levels of the intermediate temperature detector 20 and the temperature setting device 22, the flow rate in the path 9 is suppressed too much and the flow rate detector 12
It is also easy to prevent the inconvenience of heating being stopped due to heating.

FIG. 2 shows another embodiment of the present invention, in which the same components as in the example of FIG. 1 are given the same numbers. The difference from FIG. 1 is that the ratio control valve 10 is provided at the branch point of the water supply channel 6. Since it is an incompressible fluid, the mixing ratio is equal to the division ratio, so the operation and effect described in FIG. 1 can also be achieved in the embodiment shown in FIG. In addition, by installing the ratio control well IO at the branch point, there is no need to handle high-temperature water, which not only simplifies the selection of materials used, but also creates a system with excellent durability and reliability. .

One embodiment of the ratio control well 10 is shown in FIG.

The valve housing 24 is provided with a water supply hole 25 that connects to the water supply channel 6 and reaches a valve chamber 26, and the valve chamber 26 has valve seats 27 and 28 formed in vertically symmetrical positions, which are connected to outlets 29 and 30, respectively. . This outlet 29 is connected to the medium temperature waterway 7 and the outlet 30
is connected to route 9 by piping. There are valve bodies 32 and 33 attached to a valve shaft 31 facing the valve seats 27 and 28, and a spring 34 is interposed so as to separate them from each other.

The valve stem 31 is driven by a stamping motor 3 which is an electric drive means.
It performs vertical movement by connecting with a conversion mechanism 36 that decelerates the rotation of 5 and converts it into linear motion. With the above configuration, if the intermediate hot water temperature is higher than the set temperature, the path 9 becomes a cold water supply path, and as the valve stem 3l moves upward, the outlet temperature will decrease. The motor 35 is rotated in forward and reverse directions while feeding back the signal from the outlet hot water temperature detector 2l, and a flow rate ratio that provides the set temperature is selected. next,
If the medium-hot water temperature is lower than the set temperature, the path 9 becomes a high-temperature water supply path, and upward movement of the valve stem 31 has a characteristic that the outlet temperature increases. Therefore, depending on whether the instant hot water heater 8 is in operation or not, the direction of valve shaft movement must be reversed in order to eliminate the deviation between the set temperature and the detected temperature.

This is achieved simply by reversing the direction of motor rotation in the control circuit 23. In the configuration shown in FIG. 3, the water pressure from the water supply channel 6 acts through the valve body in the direction of stretching the valve shaft 31 and is canceled out, so the torque of the motor 35 may be small. Further, when the valve body 33 reaches the abutting position to completely close the valve seat 28, for example, even if the valve shaft 31 moves further downward, the spring 34 will only be compressed. The valve seat 28, the valve body 33, or the conversion mechanism 36 will not be damaged or deformed. Although FIG. 3 shows a configuration compatible with the embodiment of FIG. 2, the outlet 29
Needless to say, it can be applied to the embodiment shown in FIG. 1 by arranging piping so that hot water is supplied from the water supply port 30 and discharged from the water supply hole 25. Reversing the operating direction of the ratio control valve depending on the temperature relationship between the two connected paths is very convenient because it allows the mixing operation to be performed correctly even when the paths are incorrectly routed or the paths must be connected in the opposite direction due to installation. It is. In addition to automatically determining whether to reverse the driving direction as in the above two embodiments, it is also possible to use a method in which a human turns a switch.

Effects of the Invention As described above, the present invention provides a ratio control valve that adjusts the flow rate ratio of high-temperature water and low-temperature water, an electric drive means for driving this ratio control valve, and a path 1 connected to the ratio control valve. and route 2
, a temperature setting device for specifying the mixing temperature, a hot water temperature detector for detecting the mixing temperature, and an electric drive means according to the deviation between the signals of the temperature setting device and the hot water temperature detector, and a path 1 and a hot water temperature detector. Since the controller includes a controller that reverses the operating direction of the proportional control valve when the temperature relationship in path 2 is reversed, the following effects are achieved.

(1) Since the mixing ratio of hot water and water can be changed electrically, the temperature can be adjusted automatically by simply specifying the mixing temperature with the temperature setting device, making it easy to operate.

(2) Even if the temperature relationship between path 1 and path 2 is reversed, the ratio control valve operates in the opposite direction to perform control, thereby preventing the risk of high temperature hot water being supplied.

(3) Even if there is a mistake in the piping between route 1 and route 2, or if they have to be connected in the opposite direction due to installation reasons, the ratio control valve will operate in the opposite direction to perform control, making the construction work extremely difficult. It's easy to do.

[Brief explanation of drawings]

Fig. 1 is a system diagram of a water heater showing one embodiment of the present invention, Fig. 2 is a system diagram of a water heater showing another embodiment of the invention, and Fig. 3 shows a ratio control valve used in the equipment. The partially sectional view shown in FIG. 4 is a system diagram of a conventional water heater. 7...Route l, 9...Route 2, 10.
... Ratio control valve, 2l ... Hot water temperature detector, 22 ... Temperature setting device, 23 ... Control circuit (controller), 35 ... ... Stamping motor (electric drive means). Name of agent: Patent attorney Shigetaka Awano One idiot! 1 Figure No. 41! 1 7---SiL word! q “Ichibangaku 2 to = Ichihi f I #1 Kyoben zt - 11 Mi = J, Wen J Kenbatake 22-51 7! Beating Tsuta z3 Ikun Igun Meto 112B

Claims (1)

[Claims] a ratio control valve that adjusts the flow rate ratio of high-temperature water and low-temperature water; an electric drive means that drives the ratio control valve; a first path connected to the ratio control valve; a second path; a temperature setting device that specifies the mixing temperature of high temperature water and low temperature water whose ratio is controlled by a ratio control valve; a hot water temperature detector that detects the mixing temperature of high temperature water and low temperature water; and the temperature setting device and the hot water temperature detection device. The electric drive means is controlled in accordance with the deviation of the signal of the ratio control valve, and when the temperature relationship between the first path and the second path is reversed, the ratio control valve is controlled via the electric drive means. A water heater equipped with a controller that performs control to reverse the direction of valve operation.