JPH05233075A - Hot water/water mixer - Google Patents

Abstract

PURPOSE:To reduce overshoot at the time of transition by previously detecting the temperature of hot water to be supplied concerning the hot water/water mixer which can adjust the ratio of mixing hot water and water. CONSTITUTION:This device is composed of a supplied hot water temperature detector 34 provided at a hot water duct 22, mixing valve 25 to adjust the ratio of mixing hot water and water guided from the hot water duct 22 and a water duct 20, mixed hot water temperature detector 26 to detect the temperature of mixed hot water, controller 36 to set the temperature of mixed hot water and to instruct the pouring of hot water/stop of water or to instruct the adjustment of a flow rate, and controller 27 to instruct corrected drive by always comparing mixed hot water temperature set values set by the mixed hot water temperature detector 26 and the controller 36. Then, the controller 27 controls the mixing valve in the case of starting pouring hot water by previously detecting the temperature of hot water to be supplied while using the supplied hot water temperature detector 34.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a hot and cold water mixing apparatus capable of adjusting the mixing ratio of hot water and water.

[0002]

2. Description of the Related Art Heretofore, there has been a hot water mixing device of this type as shown in Japanese Utility Model Laid-Open No. 55-59223. As shown in FIG. 3, a hot water side valve body 5 and a water side valve body 6 are attached to a shaft 7 in a valve body 4 having a hot water inlet 1, a water inlet 2 and a mixed hot water outlet 3. It is fixed. Shaft 7 is screw mechanism 8
And a motor 10 via an external reduction gear 9 to change the mixing ratio of hot water and hot water by the hot water valve body 5 and the water side valve body 6. The temperature is set by the mixed hot water temperature adjusting switch 13 provided in the setting device 12, and the hot water instruction switch 14
When is pressed, the mixed hot water temperature is detected by the thermistor 11, and the detection signal and the set value of the mixed hot water temperature adjusting switch 13 are compared by the controller 15 and adjusted by the motor 10. Then, the mixed hot water temperature is supplied to the hot water supply location from the faucet 16 provided in the terminal.

[0003]

However, in the above-mentioned conventional configuration, the state determination of the hot water temperature of the stagnant water in the hot water supply pipe connected to the hot water inlet 1 from the heat source machine and the boiling hot water temperature set value of the heat source machine is made. Based on the mixed hot water temperature detected by the thermistor 11 from the time when the hot water discharge instruction switch 14 is pressed without being able to perform the operation, the controller 15 compares the detection signal with the set value of the mixed hot water temperature control switch 13 to drive and control the motor 10. To set the value as close as possible. Therefore, when the hot water outlet switch 14 is pressed when the accumulated water in the hot water supply pipe has cooled and is below the set value, the temperature of the mixed hot water detected by the thermistor 11 is lower than the set value, so the hot water valve body 5 is moved in the fully open direction. The motor 10 is driven to do so. Then, when the accumulated water in the pipe is sequentially discharged and then the high-temperature hot water boiled by the heat source device is rapidly supplied, the thermistor 11 detects the mixed hot water temperature in that state and determines that it is equal to or higher than the set value. However, the operation of squeezing the hot water valve body 5 which is the reverse operation to the previous one was performed, but as shown in FIG. 4, there is a problem that hot water above the set value instantaneously comes out of the faucet as a transient phenomenon. It was

The present invention solves the above-mentioned conventional problems, and an object of the present invention is to provide a hot and cold water mixing apparatus capable of preventing transient high temperature hot water discharge.

[0005]

The present invention achieves the above object.
To mix the hot water supplied from the water heater and the water
The joint valve and the mixing valve drive device that drives this mixing valve
The mixed hot water temperature detector that detects the hot water temperature and the flow rate of the mixed hot water temperature are adjusted.
Flow control valve and the flow control that drives this flow control valve.
Node valve drive device, the mixing valve drive device and the flow control valve
Controller for controlling the drive unit, mixed hot water temperature adjustment / flow rate adjustment
From the controller and the water heater
Equipped with a supply hot water temperature detector that detects the supplied hot water temperature
Well, the controller detects the hot water supply temperature at the previous hot water discharge when the hot water is again discharged.
Until it reaches the latest value stored in the
The hot water mixing ratio of the mixing valve is
Keep the rotation stopped and then use the mixed water temperature detector.
To control.

[0006]

With the above structure, the controller suppresses hot water discharge as a transient phenomenon regardless of the temperature of the supplied hot water in the hot water supply pipe.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIGS. In FIG. 1, reference numeral 20 denotes a water flow path, which is connected to a water supply pipe 21. Reference numeral 22 is a hot water flow path, which is connected to the heat source device 23 and the hot water supply pipe 24.
Is a mixing valve for adjusting the mixing ratio of the hot and cold water introduced from the water flow path 20 and the hot water flow path 22, and the mixed hot water temperature is detected by the mixed hot water temperature detector 26 and set by the controller 36. The mixed hot water temperature set value and the mixed hot water temperature value detected by the mixed hot water temperature detector 26 are constantly compared, an instruction signal is issued from the controller 27, and the mixed valve drive device 28 corrects and drives the mixed hot water temperature. The flow rate control valve 29 adjusts the valve opening, and the controller 3
6 has a function of discharging hot water to each spout and stopping water, and a mixed flow rate value issued from the flow rate sensor 30 according to a mixed flow rate instruction set by the controller 36 and a flow rate value set by the controller 36. Controller 2 is always compared with
7 sends an instruction signal to the flow control water stop valve driving device 35 to perform correction driving to adjust the valve opening. Reference numeral 31 denotes a water discharge port switching valve that operates in conjunction with a hot water discharge instruction signal to each water discharge port provided in the controller 36, and discharges hot water from the shower water discharge port 32 or the washing place water discharge port 33 on the downstream side. Reference numeral 34 denotes a supply hot water temperature detector provided in the hot water flow path 22, and regulates the mixing ratio position of the mixing valve 25 at the start of hot water discharge.

Next, the operation will be described with reference to FIG.
That is, the mixing valve 25 is stopped at the mixing ratio position at the time when the hot water is tapped last time when there is no hot water instruction from the controller 36, and when the hot water instruction signal is input, the detected value of the hot water supply temperature detector 34 is judged. Based on the fixed time elapses or until the value approaches the previous hot water supply temperature value, the value is controlled by the detection value of the hot water supply temperature detector 34. Mixed hot water temperature detector 2
The mixed hot water temperature is controlled based on 6.

As described above, according to the hot and cold water mixing apparatus of the embodiment, the hot water temperature value supplied to the mixing valve 25 in advance can be determined by detecting the hot water supply temperature. It is possible to suppress fluctuations in the hot water temperature (hereinafter referred to as overshoot).

If a microcomputer or the like is applied, the predictive control based on the calculated value can be easily performed.

[0011]

As is apparent from the above embodiments, the hot and cold water mixing apparatus of the present invention is provided with a hot water supply temperature detector in the hot water flow path, and when re-leaving hot water, the hot water supply temperature detector detects the hot water temperature at the previous hot water discharge and sequentially stores it. The hot water mixing ratio of the mixing valve is maintained at the previous stop state until the value approaches the specified value, or for a fixed period of time, and then a controller for controlling with the mixed hot water temperature detector is provided. With this configuration, since the hot water temperature supplied in advance can be detected, overshoot at the start of hot water discharge can be suppressed.

[Brief description of drawings]

FIG. 1 is a configuration diagram of a hot and cold water mixing apparatus according to an embodiment of the present invention.

FIG. 2 is an operation flowchart of the hot water mixing device.

FIG. 3 is a configuration diagram of a conventional hot and cold water mixing device.

[Fig. 4] Temperature fluctuation diagram of mixed hot water at the start of tapping of the hot water / water mixing device

[Explanation of symbols]

 25 Mixing Valve 26 Mixed Hot Water Temperature Detector 27 Controller 28 Mixing Valve Drive Device 29 Flow Control Valve 34 Supply Hot Water Temperature Detector 35 Flow Control Valve Drive Device 36 Controller

Claims (1)

[Claims] 1. A mixing valve for mixing hot water and water supplied from a water heater, a mixing valve drive device for driving the mixing valve, a mixed hot water temperature detector for detecting a mixed hot water temperature, and a mixed hot water temperature detector. A flow rate control valve for controlling the flow rate, a flow rate control valve drive device for driving the flow rate control valve, a controller for controlling the mixing valve drive device and the flow rate control valve drive device, mixed hot water temperature control, flow rate control and hot water discharge A controller for instructing stoppage of water and a hot water supply temperature detector for detecting the hot water supply temperature supplied from the hot water supply device are provided, and the controller detects the hot water supply temperature detector at the previous hot water discharge at the time of re-hot water discharge. A hot and cold water mixing apparatus which maintains the hot and cold water mixing ratio of the mixing valve in the previous stopped state until the stored latest value is approached or for a predetermined fixed time, and then controls using the hot water mixing temperature detector.