JPS62256112A - Hot and cold water mixer - Google Patents

Abstract

PURPOSE:To permit a safe use of a mixer even in a damp place such as a bathroom by constituting the apparatus in such a way that a mixing valve unit and a setter are connected through an optical fiber and the setter is electrically insulated. CONSTITUTION:The setter 2 to set the desired temperature of mixed waters is provided, and a controller 21 in the mixing valve unit 22 and the setter 23 are connected through the optical fiber 24. The controller 21 has a light emitting unit 25 and a light receiving unit 26, and the former transmits an optical signal to the setter 23 through the optical fiber 24 from the latter. The setter 23 mechanically modulates the optical signal, and the light receiving unit 26 of the controller 21 receives the modulated optical signal. The controller 21 responds to the temperature set by the setter 23, compares it with the signal of a thermister 20, controls a mixing valve drive device 19 according to the deviation, and obtains the mixed waters at a desired temperature. The mixing valve unit 22 and the setter 23 in a bathroom are so constituted to be connected through the optical fiber 24. Since the setter 23 is electrically insulated, it can be safely used in the humid bathroom.

Description

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

BACKGROUND ART A conventional hot water mixing device of this type has the following features, as shown in FIG.
A hot water flow path 1, a water flow path 2, and a hot water side valve body 3, a hot water side valve seat 4, a water side valve body 5, and a water side valve seat 6 are provided in the two flow paths 1.2, respectively, and the two valves are connected to each other. The body 3.5 is fixed to the same shaft 6, and is opened and closed in inverse proportion by a motor 7 and a gear 8. Detection temperature of the thermistor 9 and setting device 10 for detecting the mixed water temperature
The controller 11 controls the motor 7 according to the amount of deviation from the temperature set in , and obtains mixed water having a temperature equal to the set temperature. (For example, Japanese Utility Model Application Publication No. 55-59223) Problems to be Solved by the Invention However, with the above configuration, when installing in a bathroom, if both the hot water mixing device and the setting device are installed outside the bathroom, it will cause problems in the bathroom. If the user is unable to set the temperature and only the setting device is installed inside the bathroom, the signal line will be brought into the bathroom, and the setting device itself will be exposed to some voltage and humidity. Dangers such as electrical leakage are likely to occur in a bathroom with many bathrooms.

The present invention solves these conventional problems and aims to provide a hot water mixing device that is electrically safe and easy to use.

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 that adjusts the mixing ratio of hot water and water, and a mixing valve drive that electrically drives the mixing valve. a mixing valve unit configured of a controller for controlling the mixing valve driving device; a setting device that is isolated from the mixing valve unit and that sets a desired temperature of the mixed water; and the setting device and the mixing valve unit. It consists of an optical fiber that communicates with the controller inside.

According to the above configuration, the controller controls the mixing valve driving device according to the temperature set by the setting device to obtain mixed water equal to the set temperature, and the setting device and the controller are connected through an optical fiber. The setting temperature is notified by an optical signal, and the mixing valve unit and the setting device are electrically separated, so that no electricity is brought into the setting section.

Example Embodiments of the present invention will be described below based on the accompanying drawings.

In FIG. 1, a mixing valve 16 consisting of a hot water valve 13 provided in the hot water side flow path 12 and a water valve 15 provided in the water side flow path 14;
A mixing valve driving device 19 consisting of a hot water valve driving device 17 and a water valve driving device 18 that electrically drive the hot water valve 13 and water valve 15 of the mixing valve 16, respectively, and a thermistor 20 provided downstream of the mixing valve 16. , a controller 21 for controlling the mixing valve drive device 19, and a mixing valve unit 22 is installed outside the bathroom, while a setting device 23 for setting a desired mixed water temperature is provided inside the bathroom, and a controller 21 for controlling the mixing valve driving device 19 is provided. The controller 21 and the setting device 23 in the unit 22 are connected through an optical fiber 24, and the controller 21 has a light emitter 25 and a light receiver 26, and an optical signal is sent from the light emitter 25 to the setting device 23 through the optical fiber 24. The sending and setting device 23 mechanically modulates the optical signal,
The light receiver 26 of the controller 21 receives the modulated optical signal, the controller 21 responds with the temperature set by the setting device 23, compares it with the signal of the thermistor 20, and controls the mixing valve drive device 19 based on the amount of deviation. The temperature of the mixed water is controlled to obtain the desired temperature.

In the above configuration, since the mixing valve unit 22 and the setting device 23 in the bathroom are configured to be connected via the optical fiber 24,
Since the setting device 23 is electrically insulated, it can be safely used in a humid bathroom, and there is no need for a completely waterproof structure, resulting in lower costs. In addition, the mixing valve 16 has independent drive devices for the hot water valve 13 and the water valve 15, and has multiple electrical noise sources, but since it is connected to a setting device at a remote location via optical fiber, it is not susceptible to noise. It is also safe.

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

(1) The mixing valve unit and setting device are connected via optical fiber, and the setting device is electrically insulated, so it can be used safely even in humid bathrooms, and a completely waterproof structure is not required. , the cost will also be lower.

(2) Optical fiber is used to communicate between the mixing valve unit and the setting device, so the setting device can be safely controlled even at a remote location without being affected by electrical noise.

(3) By using an optical fiber for communication between the setting device and the mixing valve unit, there is no risk of water entering the mixing valve unit due to capillary action that occurs in general lead wires, and reliability is improved.

[Brief explanation of drawings]

FIG. 1 is a block diagram of a hot water mixing device according to an embodiment of the present invention, and FIG. 2 is a block diagram of a conventional hot water mixing device. 16...Mixing valve, 19...Mixing valve drive device, 21...Controller, 22...Mixing valve unit, 23... Setting device, 24...
・Optical fiber. Name of agent: Patent attorney Toshio Nakao and 1 other person
Sea-ra l i 5 gozu 1 to tq - 1-ra kongo masu shu yuki kougou 21- system #25 22-5 bi 41 catty unit z3-1 general ruler? 4--Optical fiber Figure 1 Figure 2

Claims (2)

[Claims] (1) A mixing valve unit comprising a mixing valve that adjusts the mixing ratio of hot water and water, a mixing valve drive device that electrically drives the mixing valve, and a controller that controls the mixing valve drive device;
A hot water mixing device comprising a setting device for setting a desired temperature of mixed water, which is provided separately from the mixing valve unit, and an optical fiber communicating the setting device and a controller in the mixing valve unit. (2) The hot water mixing device according to claim 1, wherein the mixing valve unit is provided outside the bathroom, and the setting device is provided inside the bathroom.