JPS61153425A - Mixing device of hot water and water - Google Patents

Abstract

PURPOSE:To prevent supply of hot water at the time of restarting of hot water supply and over-chute.under-chute, by making a movement of a mixing valve start or suspend according to supply or suspension of mixed hot water. CONSTITUTION:A controller 32 compares a setting signal preset by a mixed hot water temperature setting device 30 and a signal of the temperature detected by a mixed hot water temperature detector 20 by a comparative part 33 result of which is transmitted to a control part 34 as a deviation signal and drives a driving device 24 based on the relation between the deviation signal which has been preset and a driving quantity. A mixing valve 19 is controlled to a mixing ratio to obtain a preset temperature and the mixed hot water whose temperature is appropriate is supplied to a hot water supply object. When hot water supply becomes unnecessary and a hot water supply indicator 31 is turned OFF, a driving device 24 is suspended, a valve position of the mixing valve 19 is fixed to the mixing ratio preset directly before suspension of the same and the hot water supply is suspended by acting a control valve. Although the control valve 28 is opened and the driving device also starts driving when the hot water supply indicator 31 is turned ON at the time of restarting of the hot water supply, as the position of the mixing valve 19 has been fixed, prevention of supply of hot water and a reduction of over chute.under chute can be performed.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a hot water mixing device that adjusts the mixing ratio of hot water and water to obtain an appropriate temperature.

2. Description of the Related Art A conventional hot water mixing device of this type is shown in FIG. (For example, Japanese Utility Model Publication No. 55-59223) In Fig. 3, hot water inlet 1, water inlet 2, and mixing hot water outlet a
Inside the valve frame body 4 having a hot water side valve body 5 and a water side valve body 6 are provided to adjust the mixing ratio of hot water and water.

The hot water side valve body 5 and the water side valve body 6 are fixedly provided on a shaft 7, and this shaft 7 is driven by a motor 10 via an external screw mechanism 8 and a gear 9. The temperature of the mixed hot water is detected by a temperature detector 11, and the controller 1a drives and controls the motor 10 to adjust the temperature of the mixed hot water so as to eliminate the temperature deviation from the temperature setting device 12. That is, when you set the desired mixed water temperature with the temperature setting device 12, the temperature detector 11
While monitoring the temperature of the mixed hot water, the motor 10 controls the hot water side valve body 5 and the water side valve body 6 to positions where an appropriate temperature is obtained.

Problems to be Solved by the Invention Since the conventional hot water mixing device was constructed as described above, it had the following problems.

(1) If the faucet etc. is closed and the supply of mixed hot water is stopped,
The temperature around the temperature sensor 11 cools down due to natural cooling, and in order to obtain the mixed water temperature indicated by the temperature setting device 12, the hot water side valve body 5 moves in the opening direction, and the water side valve body 6 was driven in the closing direction, so if hot water supply was restarted, hot water would be supplied, which was dangerous.

■ In addition, when closing a faucet, etc., the hot water side valve body 5
, the water-side valve body 6 moved, and the mixed hot water temperature sometimes overshot or undershot when hot water was tapped again. As the flow rate decreases, the hot water side valve body 5 and the water side valve body 6
Since the pressure loss between hot water and water is reduced, the difference in pressure change between hot and cold water will greatly affect the valve position, and the valve position will be different at high flow rate and low flow rate even if the mixed water temperature is the same. It was for the purpose of coming.

The present invention solves such conventional problems by starting and stopping the movement of the mixing valve in accordance with the supply/stop of mixed hot water, and preventing the supply of hot water and overshoot/undershoot when hot water supply is resumed. The purpose is to

Means for Solving the Problems In order to solve the above problems, the hot water mixing 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 driving device for controlling the temperature of the mixed water. A mixed water temperature detector to detect the mixed water temperature, a mixed water temperature setting device to set the mixed water temperature, a control valve to supply and stop the mixed hot water, a hot water supply indicator to instruct the start and stop of hot water supply, and a mixed water temperature It has a comparison section and an adjustment section that control the drive device based on the signals from the setting device and the mixed water temperature detector, and also controls to stop the drive device when hot water supply stops according to instructions from the hot water supply indicator. It is equipped with a controller that performs the following.

Function The present invention uses the above-described configuration to compare the mixed hot water temperature set by the mixed hot water temperature setting device with the mixed hot water temperature detected by the mixed hot water temperature sensor, and adjusts the mixing temperature via the drive device so as to eliminate the deviation. In addition to controlling the valve, when the hot water supply indicator instructs the hot water supply to stop, the drive device stops moving, fixes the mixing valve at the mixing valve position that obtains the mixed water temperature at that time, and hot water is supplied when hot water is re-discharged. This prevents the mixed hot water from causing large overshoot cyanide shoots.

Embodiments Hereinafter, embodiments of the present invention will be described based on the accompanying drawings.

In FIG. 1, inside a valve frame 17 having a hot water inlet 14, a water inlet 16, and a mixed hot water outlet 16, there is a pressure regulating valve 18 for equalizing the pressure of hot water and water, and a pressure regulating valve 18 for equalizing the pressure of hot water and water, and a mixing ratio of hot water and water. A mixing valve 19 for adjustment and a mixing water temperature detector 20 for detecting the mixed water temperature are built-in.

In the mixing valve 19, a hot water side valve body 21 and a water side valve body 22 are driven by a movement mechanism 24 provided externally via a shaft 23. This drive device includes a motor 25, a gear box 26, and the like. The mixed hot water that exits the valve body 17 is transferred to the mixed hot water path 27.
, the discharge port 2 via the control valve 28 that stops the supply of mixed hot water.
From 9 onwards, hot water is supplied to the hot water supply target. A mixed hot water temperature setting device 30 and a hot water supply instruction i31 for instructing the start and stop of hot water supply are provided near the discharge port 29. The hot water supply instruction 631, the mixed water temperature setting device 30, and the signals from the mixed water temperature detector 20 are input to the controller 32, and the controller 32 receives the driving device 2.
4 and control valve 28 are connected.

As shown in FIG. 2, the inside of the controller 32 includes a comparison section 33 that compares the signals from the mixing water temperature setting device 30 and the mixing water temperature detector 20 to obtain a temperature deviation, and a comparison section 33 that receives the signal from the comparison section 33. an adjustment section 34 that sets the amount of drive of the drive device 24;
Further, the driving device 24 is configured to be started and stopped based on a signal from the hot water supply indicator 31.

To describe the operation of the above configuration, first, the hot water supply indicator 31
When the start of hot water supply is instructed, the control valve 28 is opened and the dispensing of mixed hot water is started. Hot water and water entering the valve frame 17 from the hot water inlet 14 and the water inlet 15 are equalized in pressure by the pressure regulating valve 18, and then enter the mixing valve 19. The mixing ratio of hot water and water is adjusted by a mixing valve 19, and the temperature of the mixed hot water is detected by a mixed hot water temperature detector 20. -For force controller a2,
The setting signal set by the mixed hot water temperature setting device 30 and the temperature signal detected by the mixed hot water temperature detector 20 are compared by the comparing section 33 and transmitted to the adjusting section 34 as a deviation signal. A signal for driving the drive device 24 is transmitted to the adjustment section 34 based on a preset relationship between the deviation signal and the drive amount. In this way, the mixing valve 19 is controlled to a mixing ratio that provides the temperature set by the mixing water temperature setting device aO. The mixed hot water at the appropriate temperature is supplied to the hot water supply target via the mixed hot water path 27 and the control valve 28. When hot water supply becomes unnecessary and the hot water supply indicator a1 is turned off, the driving of the drive device 24 is first stopped in conjunction with this, and
The valve position of the mixing valve 19 is fixed at the mixing ratio at which the set temperature was obtained immediately before the stop.

Subsequently, the control valve 28 operates to stop the hot water supply. When restarting hot water supply, when the hot water supply indicator 31 is turned on, the control valve 28 is immediately opened and the drive device also starts driving, but unlike a conventional hot water mixing device, the mixing valve 19 is in the same position as it was in the previous use. Since the position is significantly different from the actual position, and there is no action to close the water side and open the hot water side during stoppage, it is possible to prevent the supply of hot water and reduce overshoot and undershoot.

In this embodiment, the control valve 28 starts and stops supplying hot water in conjunction with the signal from the hot water supply indicator 31;
Compared to the case where the drive device 24 is not interlocked, the drive of the drive device 24 can be stopped in a timely manner, the supply of hot water can be reliably prevented, and overshoots and undershoots can be further reduced. In addition, since the controller 32 stops the supply of mixed hot water using the control valve 28 after the driving device 24 stops driving, compared to the case where the supply of mixed hot water is stopped at the same time, the valve of the mixing valve 19 in the process in which the control valve 28 throttles the flow rate is This has the effect of reducing positional changes and further reducing overshoot and undershoot when hot water is tapped again.

Effects of the Invention As described above, the hot water mixing device of the present invention provides the following effects.

(1) When hot water supply is stopped, the driving device is stopped based on the signal from the hot water supply indicator, and the mixing valve position is maintained at the position where the mixed water temperature was obtained just before the hot water supply was stopped, so hot water is supplied when hot water is restarted. Therefore, overshoot and undershoot can be reduced, making it safe and easy to use.

■ When re-dispensing hot water, the mixing valve can be started from the position where the previous mixed water temperature was obtained, so as long as the set temperature of the mixing water temperature setting device is not changed, the target water temperature can be obtained quickly.

■ The drive unit stops driving when hot water supply stops, so
You can reduce unnecessary energy usage.

[Brief explanation of drawings]

FIG. 1 is a configuration diagram including a partial cross-sectional view of a hot water mixing device according to an embodiment of the present invention, FIG. 2 is a control block diagram of the same device, and FIG. 3 is a configuration diagram showing a conventional hot water mixing device. be. 19...Mixing valve, 20...Mixing water temperature detector,
24... Drive device, 28... Control valve,
30... Mixed hot water temperature setting device, 31... Hot water supply indicator, 32... Controller, 33... Comparison section,
34...Adjustment section.

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 detector that detects the mixed water temperature, and a mixing water temperature setting device that sets the mixed water temperature. a control valve for supplying and stopping the mixed hot water; a hot water supply indicator for instructing the start and stop of hot water supply; and a comparison unit that compares the signals of the mixed hot water temperature setting device and the mixed hot water temperature detector to find a deviation. , a controller for controlling the driving of the driving device, which has an adjusting section that adjusts the driving of the driving device according to the output of the comparing section, and a controller that controls the driving of the driving device to stop when hot water supply is stopped according to a signal from the hot water supply indicator. Device. (2) The control valve supplies mixed hot water according to the signal from the hot water indicator.
The hot water mixing device according to claim 1, wherein the hot water mixing device performs a stop operation. (3) The controller has a timer section, and after the drive of the drive device is stopped,
Claim 2 in which the supply of mixed hot water is stopped by a control valve.
Hot water mixing device as described in section.