JPS61153424A - Hot water and water mixing and supplyinging device - Google Patents

Abstract

PURPOSE:To contrive an improvement in handiness and prevention of hazard, by a method wherein hot water supply is suspended after a mixed hot water temperature has been returned to a predetermined temperature to be used usually at the time of suspension of supply of mixed hot water. CONSTITUTION:Although a suspension signal of hot water supply is applied to a second comparative part 51 of a controller 46, when a first comparative part 50 had decided that the temperature of a mixed hot water detected by a mixed hot water temperature sensor 26 is higher than a preset temperature, a second comparative part 51 drives a driving device 24 in preference to a signal of a deviation detecting part 47. A mixed hot water course 31, therefore, and a branch course 34 after a mixing valve 25 are filled with the mixed hot water, a control valve 35 is closed and at the same time also driving of the mixing valve 25 is suspended. Then when a hot water supply switch 43 is turned ON for making use of a shower 33, a control valve 37 is opened and hot water is supplied through the shower 33. In this instance, as the mixed hot water course 31 is filled with the hot water whose temperature is appropriate, high- temperature hot water is not supplied even if the shower 33 is used directly after a faucet 32 has been used.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a hot water mixing hot water supply device that mixes hot water and water to obtain an appropriate temperature.

2. Description of the Related Art Conventionally, there has been a hot water mixing water heater of this type as shown in FIG. (For example, Journal of the Society of Air Conditioning and Sanitary Engineers 1984
November issue advertising page P3-4) In Figure 3, the water supply route 3 is branched from the water supply source 1 to the water heater 2, and the water supply route 5 is the water supply route 5 to the mixing valve 4 installed in the middle. There is. The water sent to the water heater 2 is heated and turned into hot water, which is guided to the mixing valve 4 via the hot water supply path 6. The mixing valve 4 is equipped with a temperature control knob 7 that can set the temperature of the mixed water, and the temperature-adjusted mixed water is supplied to a faucet 9 or a shower 10 at the terminal via a mixed water path 8. Mixed hot water route 8 to faucet 9
The mixed hot water is supplied to the shower 10 through a branch path 11 and a water stop valve 12, and to the shower 10 through a branch path 13 and a water stop valve 14.

In operation, the mixed water temperature is set by operating the temperature control knob 7 of the mixing valve 4, and the water stop valve 12 or water stop valve 1 of the terminal is operated.
When 4 is opened, hot water from the water heater 2 and water from the water supply path 5 are mixed, and hot water at an appropriate temperature is supplied from the faucet 9 or the shower 10.

If the water stop valve 12 and the water stop valve 14 are opened at the same time, the faucet 9 and the shower 10 can be used at the same time.

Problems to be Solved by the Invention However, the conventional hot water mixing hot water supply device having the above configuration had the following problems.

(1) If the mixed water temperature used last time is different from the normal operating temperature, it is necessary to return the temperature setting knob 7 of the mixing valve 4 to the normal operating temperature when reusing it, which is a hassle. In addition, if you forget to turn it back on, hot water will be supplied if the previously set temperature was high, which is dangerous.

(2) Even if the previous temperature setting was high and the next time you operate the temperature setting knob 7 of the mixing valve 4 to return it to the normal temperature, the hot water remaining in the mixing water path 8 will not be supplied. This was particularly dangerous, especially when first pouring hot water into the bathtub from the faucet 9 and then switching to the shower 10. If you do so, you may be exposed to the high temperature water in the mixed hot water path 8 and suffer burns.

(3) When using the faucet 9 and the shower 10 at the same time, if you use the faucet 9 and the shower 10 at the same time without checking the set temperature, the shower 10
There have been problems such as taking a bath with boiling water or pouring hot water into the bathtub using the faucet 9 to raise the temperature of the water, but the water being supplied is too cold and the purpose cannot be achieved.

The present invention solves such conventional problems, and improves usability by returning the temperature of the mixed hot water to a predetermined temperature normally used before stopping the hot water supply when the supply of mixed hot water is stopped. The object of the present invention is to provide a hot water mixing hot water supply device that is designed to prevent danger.

Means for Solving the Problems In order to solve the above problems, the hot water/cold water mixing hot water supply device of the present invention includes a mixing valve for adjusting the mixing ratio of hot water and water, a driving device for driving the mixing valve, and a mixing valve for controlling the mixing ratio of hot water to water. A mixed water temperature sensor that detects the temperature, a mixed water temperature setting device that sets the mixed water temperature, a hot water supply port that supplies the mixed hot water, a control valve that adjusts the amount of mixed hot water supplied, and a mixed hot water temperature setting device. Consists of a controller that compares the signals from the mixed water temperature sensor to control the mixing valve drive device, and also controls the water supply to stop after returning the mixed water temperature to a predetermined temperature when hot water supply is stopped by the control valve. It is something to do.

Effects of the present invention With the above-described configuration, during the supply of mixed hot water, the mixing ratio is set such that the temperature of the mixed water temperature setting device is obtained, and the mixing valve is driven via the drive device while monitoring the temperature with the mixing water temperature sensor. When the control valve stops hot water supply, the mixed water temperature is returned to a predetermined temperature and hot water supply ends, regardless of the set temperature of the mixed water temperature setting device. This eliminates the danger and inconvenience in terms of usability, such as being supplied with hot water that remains inside, or forgetting to reset the temperature setting and being supplied with hot or cold water.

Example Embodiments of the present invention will be described below with reference to the accompanying drawings.

In FIG. 1, hot water and water supplied from a hot water supply path 15 and a water supply path 16 are first introduced into a pressure regulating valve 18 provided in a valve frame 17 to adjust and equalize the pressures of hot water and water. The hot water and water whose pressure has been equalized by the pressure regulating valve 18 are driven by a driving device 24, which includes a motor 22, a gear box 23, etc., provided externally through a shaft 21, and a hot water side valve body 19 and a water side valve body 20. It enters the mixing valve 25. The temperature of the mixed hot water mixed by the mixing valve 25 is detected by a mixed hot water temperature sensor 26, and the amount of mixed hot water is detected by a flow rate sensor 27, and the mixed hot water reaches a flow rate control valve 28.

The flow rate control valve 28 is used to shut off a fixed amount of water by integrating the signals from the flow rate sensor 27 as well as the drive device 29 and the valve body aO. The mixed hot water that has exited the valve body 17 is supplied to a faucet 32 and a shower 33, which are hot water supply ports at the terminal, via a mixed hot water path 31. 34 is a branch path branching from the mixed hot water path 31, and a control valve a5 for adjusting the amount of mixed hot water to be supplied is provided in front of the faucet 32. Similarly, a branch path 36 to the shower 33 and a control valve 37 are provided. Mixed water temperature setting device 38 that sets the temperature of mixed water corresponding to the faucet 32
Also, a mixed hot water temperature setting device 39 is provided corresponding to the shower 33.

The mixing water temperature setting device 38.39 is controlled by the controller 40.41.
Hot water supply switch 42, 43 that instructs to start and stop hot water supply
, are provided integrally with the flow rate adjustment knobs 44, 45. Signals from the mixed hot water temperature sensor 26, flow rate sensor 27, and mixed hot water temperature setter 38, 39 are taken into a controller 46 that performs electrical control. A control signal is transmitted from the controller 46 to the driving device 24 of the mixing valve 25 and the flow rate control valve 28. A signal is also transmitted from the controller 40.41 to the control valve 35.37.

The interior of the controller 46 is open as shown in FIG. A deviation detecting section 47 that compares the temperature set value of the mixing hot water temperature setting device 386 or a9 with the mixed hot water temperature detected by the mixing hot water temperature sensor 26, and a drive amount of the driving device 24 upon receiving a signal from the deviation detecting section 47. a drive amount setting unit 48 that sets the predetermined temperature, a predetermined temperature setting unit 49 that sets the predetermined temperature to be returned to when hot water supply is stopped;
A first comparing section 50 compares the output signals of the mixed hot water temperature sensor 26 and the predetermined temperature setting section 49, and the signals of the hot water supply knob 42, 43 and the first comparing section 50 are input, and the hot water supply knob 42
Alternatively, if a hot water supply stop signal is output from 43 and the output signal of the mixed hot water temperature sensor 26 is larger than the set value of the predetermined temperature setting section 49, the drive device 24 is driven with priority over the output signal of the deviation detection section 47. A timer 52 that is provided in the second comparison unit 51 and the hot water supply switch 43 and that delays the hot water supply start signal and delays the driving of the drive device 24 for a predetermined period of time.
The controller 46 is then opened.

Next, the operation of this embodiment will be described. When the hot water supply switch 42 is turned on to supply hot water from the faucet 32, the control valve 35 is opened, and after a predetermined time period determined by the timer 52 has elapsed, the drive device 2 is turned on.
4 is started to be driven. The hot water and water sent from the hot water supply route 15 and the water supply route 16 are equalized in pressure by the pressure regulating valve 18 and mixed by the mixing valve 25, and the mixed water temperature is determined by the mixed water sensor 26.
Detected in The mixed water temperature signal detected by the mixed water temperature sensor 26 is compared with the set value signal of the mixed water temperature setting device 38 by a deviation detection section 47, and the signal is adjusted according to the setting of the drive amount setting section 48 to eliminate the deviation. Controls the drive device 24. If the mixed hot water temperature setting device 38 is set to, for example, 42°C, the mixed hot water whose temperature is adjusted in this way by the mixing valve 25 is as follows.
The mixed hot water path 3 passes through the flow rate sensor 27 and flow rate control valve 28.
1. Hot water is supplied from the faucet a2 through the branch path 34.

Here, it is assumed that the set temperature of the mixed hot water temperature setting device a8 is set at 80°C. Then, a deviation occurs between the signals of the mixing water temperature setting device 38 and the mixing water temperature sensor 26, so the mixing ratio of hot water and water of the mixing valve 25 is changed by a command from the controller 46, and the mixing ratio of hot water and water is changed to the set 8.
0'C, is the ratio obtained. When the hot water supply switch 42 is turned off, the output hot water supply stop signal enters the second comparison section 51 of the controller 46, where the temperature of the mixed hot water detected by the mixed hot water temperature sensor 26 is determined by the predetermined temperature setting section 49. The first comparison unit 50 determines that the temperature is higher than the temperature set (for example, 42°C), and the second comparison unit 51 determines that the temperature is higher than the temperature set by the deviation detection unit 47.
The drive device 24 is driven with priority over the signal. The mixed water path 31 and branch path 34 after this waste mixing valve 25 are at 42°C.
filled with mixed hot water. After the path is filled with mixed hot water at 42° C., the control valve 35 is closed, and at the same time, the driving of the mixing valve 25 is also stopped. Next, when the hot water supply switch 43 is turned on to use the shower 33, the control valve 37 is opened and hot water supply from the shower 33 is started.

At this time, the mixed hot water path a1 is filled with hot water at an appropriate temperature of 42°C, so even if the shower 3a is used immediately after using the faucet 32, it is safe because hot water at 80°C will not be supplied. The mixed water temperature in the mixing valve 25 is controlled by the timer 520 for a predetermined period of time after the shower 33 is started.
The valve position of No. 5 is fixed at the valve position where a predetermined temperature was obtained when the faucet 32 was stopped in use last time. Therefore, if control of the mixing valve 25 is started immediately, such as when time has passed since the last use and the temperature of the hot water in the hot water supply path 15 has decreased, the hot water side valve body 19
Even if the water side is opened and the water side valve body 20 is throttled, the specified temperature cannot be obtained, so the hot water side is fully opened and the water side is fully closed, and when hot water from the water heater (not shown) arrives, the hot water is throttled and the water is There are cases where the opening operation is not done in time and hot mixed water is temporarily supplied, but this can be prevented. Note that the controllers 40 and 41 are configured so that either one can be used selectively and cannot be used simultaneously, so if one uses the other without knowing that one is set to a high temperature, This prevents hot water from being supplied.

After the hot water supply has been temporarily stopped, when the hot water supply is restarted, the set temperature may be set to a predetermined temperature.Another method is to return the set temperature to the predetermined temperature only when the hot water supply is stopped, and then set the mixed water temperature when the hot water supply is restarted. It should be added that there are two methods according to the set temperature of the setting device.

In this embodiment, the controller 46 is configured electrically;
When the temperature detected by the mixed water temperature sensor 26 exceeds the value determined by the predetermined temperature setting section 49, the mixed water temperature is returned to the predetermined value, so a simple controller configuration prevents hot water from being supplied during reuse. It has the effect of achieving Also, the controller 46
The system controls the mixing valve position to be fixed at the position where a predetermined temperature was obtained when hot water supply was stopped for a predetermined period of time when hot water supply is resumed.
This has the effect of suppressing transient temperature fluctuations and making it possible to supply hot water with little fluctuation.

Effects of the invention (1) When hot water supply is stopped, the mixed water temperature is returned to a predetermined temperature and then hot water supply is stopped. For example, when hot water is supplied at a high temperature and then reused, there is no accumulation of water from the mixing valve to the hot water supply port. It is safe and easy to use because it prevents hot water from being supplied.

(2) It is possible to return the mixed water temperature to a predetermined temperature when hot water supply is stopped, and also to automatically return it to a commonly used predetermined temperature when hot water is reused, making it a highly convenient water heater. .

(3) It is possible to prevent deterioration of sealing materials and packings due to high-temperature water remaining between the mixing valve and the hot water supply opening for a long time after the hot water supply has stopped.

[Brief explanation of the drawing]

Fig. 1 is an exploded view including a sectional view of the main parts of a hot water/water mixing hot water supply device according to an embodiment of the present invention, Fig. 2 is a control block diagram of the same device, and Fig. 3 is an open view of a conventional hot water/water mixing water heating device. It is a diagram. 24... Drive device, 25... Mixing valve,
26...Mixed water temperature sensor, 32...Faucet (hot water inlet), 33...Shower (hot water inlet),
35.37... Control valve, 38.39...
・Mixed hot water temperature setting device, 42.43... Hot water supply switch, 46... Controller, 47... Deviation detection section, 48... Drive amount setting Department, 49...
- Predetermined temperature setting section, 50...First comparison section, 5
1...Second comparison section, 52...Timer.

Claims (3)

[Claims] (1) A mixing valve that adjusts the mixing ratio of hot water and water, a drive device that drives this mixing valve, a mixing water temperature sensor that detects the mixed water temperature, and a mixing water temperature setting device that sets the mixed water temperature. , a hot water inlet for supplying mixed hot water, a control valve for adjusting the amount of mixed hot water to be supplied, and a control valve for controlling the driving device based on the deviation of signals from the mixed hot water temperature setting device and the mixed hot water temperature sensor; A hot water mixing hot water supply device comprising a controller that controls the hot water supply to be stopped after returning the mixed water temperature to a predetermined temperature when the hot water supply is stopped. (2) The controller includes a deviation detection section that detects the signals from the mixing water temperature sensor and the mixing water temperature setting device as a temperature deviation, and a drive amount setting section that sets the drive amount of the drive device according to the output signal of this deviation detection section. a predetermined temperature setting section that sets a predetermined temperature; a first comparison section that compares the output signals of the mixed hot water temperature sensor and the predetermined temperature setting section; a hot water supply instruction section that instructs to start and stop hot water supply; Signals from the hot water supply instruction section and the first comparison section are input,
When a hot water supply stop signal is output from the hot water supply instruction section and the output signal of the mixed hot water temperature sensor is larger than the set value of the predetermined temperature setting section, a second comparison is performed in which the drive device is driven with priority over the output signal of the deviation detection section. 2. A hot water mixing hot water supply device according to claim 1, which is electrically controlled. (3) The second comparing section stops driving the drive device when the temperature deviation between the mixed water temperature sensor and the predetermined temperature setting section disappears, and when the hot water supply instruction section instructs to start hot water supply, the second comparison section stops driving the drive device via the timer. 2. The hot water mixing hot water supply device according to claim 2, wherein the driving device stops driving during the set time of the timer.