JPH0769025B2 - Hot water mixing device - Google Patents

Description

TECHNICAL FIELD The present invention relates to a hot and cold water mixing apparatus for mixing hot water and water to obtain mixed water at a desired temperature.

2. Description of the Related Art Conventionally, this kind of hot and cold water mixing apparatus has been shown in FIG. (For example, Japanese Utility Model Laid-Open No. 55-59223) In FIG. 3, the inside of a valve casing 5 having a feeder 1 for supplying high-temperature hot water, a hot water inlet 2, a water inlet 3 and a mixed hot water outlet 4. The water-side valve body 6 and the water-side valve body 7 are attached to a shaft 8 and driven by a motor 11 via a linear motion conversion mechanism 9 and a gear 10 provided outside.

A mixed hot water temperature detector 12 for detecting the mixed hot water temperature is provided near the mixed hot water outlet 4, and the controller 14 controls the temperature set by the mixed hot water temperature setter 13 and the temperature detected by the hot water temperature detector 12. And the motor 11 is controlled. Further, a faucet 16 is provided at the terminal via the pipe 15. Then, when the faucet 16 is opened and the mixed hot water temperature is set by the mixed hot water temperature setting device 13, the value of the mixed hot water temperature detector 12 and the set value of the mixed hot water temperature are signal values by the controller 14, and the temperature deviation between the two is determined. The motor 11 is drive-controlled so as to be lost.

Problems to be Solved by the Invention However, the above-mentioned configuration has the following problems.

The electrical parts such as the motor 11 were not waterproof and the installation location was limited. Moreover, it was vulnerable to aged seal failure between the valve casing 5 and the shaft 8. The present invention is to solve such a conventional problem, take a waterproof structure so that water is not splashed on the electrical component, if water should enter, provide a detector to detect that, It is an object of the present invention to provide a hot and cold water mixing device that can be installed safely in a bathroom, such as stopping control or notifying the outside by the signal.

Means for Solving the Problems In order to solve the above problems, a hot and cold water mixing apparatus of the present invention comprises a mixing valve for mixing hot water and water to obtain an appropriate temperature, and a flow rate control valve for controlling the flow rate such as tapping and stopping. Valve unit to
An electrical equipment box covered with a waterproof case consisting of a drive device that electrically drives the mixing valve and the flow control valve, and a controller that controls the drive device, and water leakage or condensation water inside the electrical equipment box. It comprises a water leakage detector mounted on the printed board of the controller for detecting accumulation, and a setting device for setting a desired state quantity of the mixed water.

With the above configuration, the controller sends a signal to the drive device to control the mixing valve and the flow control valve with respect to the state quantity set by the setting device, and obtains mixed water equal to the desired state quantity.
When stagnant water is detected by the water leak detector, the hot water is stopped while the hot water is coming out, and the switch of the setting device is disabled when the water is stopped, and at the same time, the water leak is electrically notified.

Embodiment An embodiment of the present invention will be described below with reference to the accompanying drawings. In FIG. 1, a mixing valve 17 that mixes hot water and water to obtain an appropriate temperature
And a valve unit 19 composed of a flow rate control valve 18 for controlling the flow rate such as tapping and stopping, and an electric equipment box 20 is provided in parallel with the valve unit 19, and the mixing valve 17 and the flow rate are provided in the electric equipment box 20. There is a mixing valve drive device 21 and a flow control valve drive device 22 that electrically drive the control valves 18, respectively, and
The controller 23 for driving the two driving devices 21, 22 is covered with a waterproof case 24 together with the two driving devices 21, 22. A water leakage detector 25 for detecting the accumulation of water leakage or condensed water in the electrical equipment box 20 is provided. The water leak detector 25 is directly attached to the printed board 26 of the controller 23, and the electrical box 20
When the printed board 26 of the controller 23 is fixed inside the water leak detector
25 is located at the lower bottom of the electrical equipment box 20. A setter 27 for setting a desired state quantity of the mixed water is provided in the bathroom, and the controller 23 receives a signal from the setter 27 to cause the controller 23 to drive the mixing valve 17 and the flow control valve 18 via the two driving devices 21 and 22. Is controlled to obtain mixed water having a state quantity set by the setter 27.

FIG. 2 is an external view showing one embodiment of the water leak detector 25. It is composed of two L-shaped metal pieces 28, a fixed base 29 made of resin for arranging the two metal pieces 28 in parallel and stabilizing when the printed board 26 is mounted, and a resistor 30 connected to the two metal pieces 28. . With such a configuration, when the resistance value between the two L-shaped metal pieces 28 is equal to the value of the resistance 30, it is in a normal state, and the leakage or condensation of water from the valve unit 19 into the electrical equipment box 20 causes When water collects at the bottom of the electrical equipment box 20, the two L-shaped metal pieces 28 conduct, and become extremely smaller than the value of the resistance 30 to electrically detect water leakage. As described above, the water leak detector 25 of the present embodiment has a simple structure and is suitable for mounting on the printed board 26, and can be mechanically mounted like various electronic components and is excellent in mass productivity.

With the above configuration, the valve unit 19 including the mixing valve 17 and the flow rate control valve 18, the two drive devices 21, 22 and the controller 23
The electrical component box 20 consisting of is completely separated, and the electrical component part is covered with the waterproof case 24 to block ingress of water from the outside, so that it can be installed even in a high humidity atmosphere such as in a bathroom. In addition, the leakage of water or condensation of water from the valve unit 19 into the electrical equipment box 20 causes the electrical equipment box to
In the unlikely event that water enters the inside of 20, a water leak detector 25 is provided to detect that, so if stagnant water is detected, the hot water is stopped during hot water, and the switch of the setting device is turned off when water is stopped. It becomes invalid, and at the same time, it is easy to let the safety side control the whole, such as electrically notifying water leakage, which is safe and easy to use.

Effects of the Invention As described above, according to the hot and cold water mixing apparatus of the present invention, the following effects are obtained.

(1) Since the electrical equipment section consisting of the two drive units and the controller is covered with a waterproof case to block the intrusion of water from the outside,
It can be installed even in a high humidity environment such as in a bathroom.

(2) In the event that water enters the electrical equipment box, a water leak detector is provided to detect that, so if a stagnant water is detected, it is easy to control the safety side as a whole.
Safe and easy to use.

(3) The water leakage detector has a simple structure and is configured to be directly mounted on the printed board. Like the various electronic components, it can be mechanically mounted and has excellent mass productivity.

[Brief description of drawings]

FIG. 1 is a sectional view of a hot and cold water mixing apparatus according to an embodiment of the present invention, FIG. 2 is a configuration diagram of a water leakage detector in the apparatus, and FIG.
FIG. 1 is a block diagram showing a conventional hot and cold water mixing apparatus. 17 …… Mixing valve, 18 …… Flow control valve, 19 …… Valve unit,
20 …… Electrical equipment box, 21, 22 …… Drive device, 23 …… Control unit, 24 …… Waterproof case, 25 …… Water leak detector, 26 …… Printed board, 27 …… Setting device.

 ─────────────────────────────────────────────────── ─── Continuation of the front page (56) References JP-A-1-261580 (JP, A) JP-A 62-241014 (JP, A) Actually opened 57-11420 (JP, U) Actually opened 55- 59223 (JP, U)

Claims (2)

[Claims] 1. A valve unit comprising a mixing valve for mixing hot water and water to obtain an appropriate temperature, a flow rate control valve for controlling the flow rate such as tapping and stopping, and the mixing valve and the flow rate control valve are electrically operated, respectively. Mounted on the controller, which detects an accumulation of water leakage or condensed water inside the electrical equipment box, and an electrical equipment box covered with a waterproof case composed of a drive device driven to the above, and a controller controlling the drive device. A hot and cold water mixing device comprising a water leakage detector and a setting device for setting a desired quantity of mixed water. 2. A water leak detector comprises a pair of L-shaped metal pieces, a fixing base for arranging the pair of metal pieces in parallel to stabilize the printed board, and a resistor connected to the pair of metal pieces. The hot and cold water mixing apparatus according to claim 1.