JPH0743052B2 - Hot water mixing device - Google Patents

Description

TECHNICAL FIELD The present invention relates to an electrically driven hot and cold water mixing apparatus that mixes hot water and water to obtain an appropriate temperature.

2. Description of the Related Art Conventionally, this kind of hot and cold water mixing apparatus is as shown in FIG. In FIG. 2, a hot water flow path 2 communicating with the hot water supply heat source device 1, a water flow path 3, and a hot water side valve body 4, a hot water side valve seat 5, and a water side valve body 6 in the two flow paths 2 and 3, respectively. And a water side valve seat 7 are provided, and the two valve bodies 4 and 6 are fixed to the same shaft 8 and are mixed with a mixing valve 11 which performs an inverse proportional opening / closing operation by a motor 9 and a gear 10 and mixes appropriately. The controller 14 controls the motor 9 according to the amount of deviation between the temperature detected by the thermistor 12 for detecting the mixed water temperature and the temperature set by the setter 13 to obtain mixed water equal to the set temperature. Is the thermistor 12
The signal of is displayed on the monitor.

Problems to be Solved by the Invention However, in the configuration as described above, when the mixing valve 11 is near the heat source device 1 and the discharge destination is sufficiently distant, the mixed hot water temperature is displayed on the monitor display and heat is dissipated in the middle of the piping. There is a possibility that the temperature at the actual discharge destination will be different, or the hot water remaining in the pipe will not be displayed on the monitor even if it is discharged at an appropriate temperature after hot water etc. There is.

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 device that allows the user to confirm the residual hot water in the pipe, dead water, or the like, and can be used safely.

Means for Solving the Problems In order to solve the above problems, the hot and cold water mixing apparatus of the present invention is a mixing valve for mixing hot water and water to obtain hot water having a desired temperature,
A mixing valve drive device that electrically drives the mixing valve, and a mixing valve section configured by a mixing hot water temperature detector that detects the temperature of the mixed hot water, and sends the mixed hot water to a hot water supply location sufficiently distant from the mixing valve section. A hot water supply pipe, a discharge port provided at the end of the hot water supply pipe, a hot water supply temperature detector provided immediately before the discharge port to detect the hot water supply temperature, and a controller for setting and displaying the temperature of the mixed hot water. , A controller for comparing the signal of the controller with the signal of the mixed hot water temperature detector or the signal of the hot water sending temperature detector to control the mixed valve driving device.

With the above configuration, the controller compares the mixed hot water temperature set by the controller with the temperature detected by the mixed hot water temperature detector, and sends a signal to the mixing valve drive device according to the deviation amount to control the mixing valve, Obtains mixed water with a temperature equal to the set temperature, and the mixed water that has been adjusted in temperature passes through the hot water supply pipe and is discharged from the discharge port, but the signal from the hot water temperature detector provided immediately before the discharge port is displayed on the controller monitor. Is.

Embodiment An embodiment of the hot and cold water mixing apparatus of the present invention will be described below with reference to the accompanying drawings. In FIG. 1, there is a hot water supply device 15 for supplying high-temperature hot water, a hot water flow path 16 extending from the hot water supply device, and a water flow path 17, and a hot water valve 18 provided in the hot water flow path 16 and a water flow path 17
The hot water valve driving apparatus and the mixing valve 20 comprising a water valve 19 provided, the hot water valve 18 of the mixing valve 20, for electrically driving the water valve 19, respectively
21 and a water mixing valve drive device mixing valve drive device 23 , a mixing valve section 25 comprising a mixing hot water temperature detector 24 for detecting the temperature of the mixed hot water downstream of the mixing valve 20 , and the mixing valve section the Curran 26 provided apart from the 25, and Okuyukan 27 connecting the mixing valve unit 25 and Curran 26, Okuyu temperature detector 28 for detecting the Okuyu temperature immediately before Curran 26 at the end of the Okuyukan 27 Is provided. Further, a controller 29 for setting and displaying the temperature of the mixed hot water is provided in the vicinity of the currant 26, and the temperature set by the controller 29 is compared with the signal of the mixed hot water temperature detector 24 to drive the mixing valve according to the deviation amount. The controller 30 controls the mixing valve 20 via the device 23 , and the controller 29 displays the temperature detected by the hot water temperature detector 28 on a monitor.

With the above configuration, when the mixing valve section 25 is sufficiently separated from the calan 26 that actually uses hot water, heat is dissipated from the hot water pipe, dead water at the beginning of use, or residual hot water after the hot water. Even if a problem occurs, the user can check the accurate hot water temperature because the temperature is displayed on the monitor from the signal of the hot water temperature detector 28, and it is safe. The temperature detected by the hot water temperature detector 28 is compared, and if the deviation amount is larger than a predetermined value, a warning sound is emitted from the controller 29 by the electronic buzzer 31. Further, since two temperature detectors are provided, the signals of the two temperature detectors deviate by a predetermined value or more, and if there is no change in the deviation even after a lapse of a certain time, it is judged as abnormal and displayed. A function of mutually monitoring the temperature detectors can be added. Further, if the hot water supply pipe 27 is sufficiently long and a considerable amount of heat is generated there, and if there is a slight deviation between the mixed hot water temperature in the mixing valve section 25 and the hot water temperature detector 28, there will be a higher deviation. It is also possible to control the temperature of the mixed hot water so that the temperature from the discharge port matches the set temperature.

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

(1) Since the hot water temperature is detected in the immediate vicinity of the user and is displayed on the controller as a monitor, dead water in the pipe,
Even if high-temperature residual hot water is generated, the user can accurately check the hot water discharge temperature and it is safe.

(2) If there is a deviation of a predetermined value or more in the hot water supply temperature detected in the immediate vicinity of the user as compared with the set temperature of the controller, it is possible to easily provide warning display means adapted to the deviation.

(3) Since two temperature detectors are provided, even if one of them is disconnected, the other can cover its function, and at the same time, it is possible to monitor the detection states of each other.

(4) Even if the hot water supply pipe is sufficiently long and there is a lot of heat dissipation there, and the set temperature and the discharge temperature do not match, both the temperature immediately before the discharge port and the temperature in the vicinity of the mixing valve are detected. It is also possible to easily control the temperature by measuring, and adjusting the temperature to a higher level by looking at the heat radiation amount.

[Brief description of drawings]

FIG. 1 is a block diagram of a hot and cold water mixing apparatus according to an embodiment of the present invention, and FIG. 2 is a block diagram of a conventional hot and cold water mixing apparatus. 20 …… Mixing valve, 23 …… Mixing valve drive device, 24 …… Mixed water temperature detector, 25 …… Mixing valve section, 26 …… Discharge port, 27 …… Hot water pipe, 28 …… Sending temperature detection Vessel, 29 ... controller, 30 ...
… Controller.

Claims (2)

[Claims] 1. A mixing valve for mixing hot water and water to obtain a mixed hot water having a desired temperature, a mixing valve drive device for electrically driving the mixing valve, and a mixed hot water temperature detector for detecting the mixed hot water temperature. And a hot water supply pipe for sending hot water to a hot water supply location apart from the hot water supply pipe, a discharge port provided at an end of the hot water supply pipe, and a hot water supply device provided immediately before the discharge port. A hot water temperature detector for detecting the temperature, a controller for setting and displaying the temperature of the mixed hot water, and comparing the signal of the controller with the signal of the hot water temperature detector or the signal of the hot water temperature detector, A hot and cold water mixing device comprising the mixing valve drive device, the controller, or a controller for controlling both. 2. The controller according to claim 1, wherein the controller issues a warning signal through the controller when the difference between the signal of the mixed hot water temperature detector and the signal of the hot water feed temperature detector exceeds a predetermined value. Hot and cold water mixing device.