JPH02150581A - Automatic faucet - Google Patents

Abstract

PURPOSE:To prevent a seal ring, packing, a valve stem or the like from seizure or binding as well as a scale from sticking to them by constituting a valve body so as to be periodically moved, in an electronical automatic faucet which opens or closes a valve with slide motion of the valve body. CONSTITUTION:A memory 44 of a controller C stores a program controlling a drive motor 16, detecting temperature in mixed hot and cold water being discharged out of a combination faucet V1 of a hot-cold-water combiner A with a temperature sensor 27, and it calculates both of the turning direction and angle of the drive motor 16 from the temperature detected value and the setting temperature. Especially, a timer is set up in the program, and this timer starts each time operation of the drive motor 16 is stopped, and when a given period of time, for example, 24 hours elapses, the drive motor 16 is rotated as far as the specified frequency, for example, only one time. Then, seizure or binding and scale sticking in a seal ring 21 and packing interposingly installed between a valve box 14 and a valve body 13 as well as a piece of packing 22 installed interposingly between the valve box 14 and a valve stem 15, which are caused by suspending operation of the valve body 13 for periods, are prevented from occurring.

Description

[Detailed description of the invention] (a) Industrial application field The present invention can be used even if it is not used for a certain period of time
This invention relates to an automatic faucet that can prevent seal links, seals, valve stems, etc. from sticking.

(b) Conventional technology Conventionally, automatic valves were opened and closed by connecting or closing a fixed valve hole provided in a valve body and a movable valve hole provided in a valve body by sliding the valve body. For example, an automatic faucet is installed at the junction of the hot water supply side and the water supply side, and the automatic faucet adjusts the mixing ratio of hot water and water to discharge a mixture of hot water and water at a set temperature. There is a hot water mixing device, etc.

(c) Problems to be Solved by the Invention However, if an automatic faucet is not used for a long period of time, the seal links, seals, valve stems, etc. used in the automatic faucet may become stuck or have scale attached to them. Therefore, there are problems in that the operation becomes heavy, excessive force is applied to the actuator that drives the automatic faucet, and the metal parts of the automatic faucet corrode.

(d) Means for Solving the Problems In the present invention, the valve is opened and closed by communicating or closing a fixed valve hole provided in the valve body and a movable valve hole provided in the valve body by sliding the valve body. An object of the present invention is to provide an automatic faucet characterized in that the valve body is moved periodically.

Further, the present invention provides a configuration in which a valve body is provided at the confluence of a water supply pipe and a hot water supply pipe to discharge mixed hot water at a set temperature from the downstream side, and an operating range of the valve body is changed to an automatic water supply pipe. It is also an object of the present invention to provide an automatic faucet having a configuration in which water is not discharged from the downstream side of the faucet.

(e) Functions and Effects According to the present invention, even when an automatic water faucet is not used for a certain period of time or more and remains inactive, the valve body is moved periodically, so the seal ring, This prevents the seals, valve stems, etc. from sticking or scale from adhering to them, making the operation heavy and causing excessive force to be applied to the actuator that drives the automatic faucet. It is possible to prevent corrosion from occurring.

In addition, during the anti-sticking operation mentioned above, the operating range of the automatic faucet is
By setting the automatic faucet within a range where no water is discharged from the downstream side, it is possible to prevent water from being discharged inadvertently.

(F) Example Hereinafter, the present invention will be described using a hot water mixing device constituted by a hot water mixing faucet as a form of an automatic faucet as an example of a real square color.

FIGS. 1 and 2 show a hot water mixing device (^) equipped with a cylindrical hot water mixing faucet (vl) as a first embodiment.

In the figure, (11) and (12) are water supply pipes and hot water supply pipes, and a hot and cold water mixing faucet (VL) is installed at the confluence point, and an automatic switching valve (E) installed downstream of the water supply pipe. It communicates with a connecting pipe (31) that communicates with the washbasin spout and a connecting pipe (32) that communicates with the shower, and also communicates with a solenoid valve (33).
), it also communicates with a branch pipe (34) that communicates with the bathtub spout.

As shown in Figures 1 and 2, the hot water mixing faucet (VL) is
The valve body (13) of the operating part is rotatably inserted into the valve box (14), and is connected to the drive motor (16) via the valve shaft (15).
It is linked and linked.

The outer wall of the valve body (13) has movable valve holes (1) on the water side and the hot water side.
7) (18) is open, and there are fixed valve holes [19] (20) on the water side and hot water side on the inner wall surface of the valve box (14).
is open, and by controlling the rotation of the valve body (13), the opening degrees of the valve holes on the water side and the hot water side are adjusted, and the mixing ratio of hot water and water is adjusted to produce mixed hot water at a set temperature. It is configured to discharge.

In addition, the openings of the movable valve holes (17) (18) and the fixed valve holes (19) (20) do not match in the range of about 30 degrees on the left and right sides from the center of the operating range of the valve body (13). , a neutral range is established in which no water is allowed to flow downstream.

Seal rings (21) (21) are attached to the fixed valve holes (19) (20), respectively, and the tips of the seal rings (21) (21) slide against the side wall of the valve body (13) to prevent water. Prevents leakage.

Furthermore, two gaskets (22) (22) are interposed between the valve stem (15) and the valve body (14), and the valve body (13)
) and the valve box (14).
3) is provided.

In the figure, (24) (24) is a check valve with a strainer, (2
5) is a rectifier, (26) is a flow rate sensor, and (27) is a temperature sensor.

Based on the detected value of the temperature sensor (27), the control device (C) controls the drive motor (16) to rotate the valve body (13) and discharge mixed hot water at a set temperature. It consists of

As shown in FIG. 3, the control device (C) includes a microprocessor (41), an input/output interface (42) (
43) and a memory (44), mixed hot water discharge and stop buttons (45) (46), and a temperature setting device (44).
47) and the temperature sensor (27) are connected via the input interface (42), and the output interface (
43) to the drive motor (16).

In addition, the memory (44) stores a program for controlling the drive motor (16), detects the temperature of the mixed hot water to be discharged with a temperature sensor (27), and calculates the detected temperature value from the above-mentioned set temperature. The rotation direction and rotation angle of the drive motor (16) are calculated.

In particular, a timer is set during the above program,
The timer starts every time the operation of the drive motor (16) stops, and after a certain period of time, for example, 24 hours, it rotates the drive motor (16) a predetermined number of times, for example, once, and The seal rings (21) and packing (23) interposed between the valve body (14) and the valve body (13), which are generated when the operation of the body (13) is stopped, and the valve body (
14) and the valve stem (15).
This prevents the adhesion of N22) and the adhesion of scale.

In addition, if it is undesirable for water, hot water, or mixed hot water to be discharged during the operation of preventing the valve body (13) from sticking, the valve body (13) may be rotated within the neutral range described above. good.

FIGS. 4 and 5 show a disk-type hot water mixer faucet (v2) as a second embodiment, showing a water supply pipe (51) and a hot water supply pipe (51).
2) is located at the confluence with

The hot water mixing faucet (v2) has a fixed disc (
54) is fixed in a non-rotatable manner, and a movable disk (55) is superimposed on the fixed disk (54) in a watertight and slidable manner.
The movable disk (55) is rotated in forward and reverse directions by a drive motor (56).

The fixed disk (54) has a hot water hole (59) and a water hole (6) that communicate with the hot water supply pipe (52) and the water supply pipe (51), respectively.
0), and the sliding contact surface of the movable disk (55) with the fixed disk (54) has a hot water hole (59), a water hole (60), and a hot water mixing pipe (61). A mixing chamber (62) is formed for controlling communication.

Then, based on the detected value of the temperature sensor installed in the mixing hot water pipe (61), the control device controls the drive motor (56) to rotate the movable disk (55), thereby rotating the mixing hot water pipe (61).
1) is configured to discharge mixed hot water at a set temperature.

The control device of this hot water mixing device has approximately the same configuration as that of the first embodiment, and the movable disk (55)
When the operation of the movable disk (55) stops, the movable disk (55) is automatically operated a predetermined number of times and within the rotation range, and the fixed disk (55)
4) and the movable disk (55) and the adhesion of scale.

Furthermore, the present invention can be applied not only to automatic faucets but also to flow rate regulating valves and the like that are configured to open and close by sliding the valve body to prevent water from sticking, scale, etc.

[Brief explanation of the drawing]

Fig. 1 is a front view of the hot water mixing device of the first embodiment, Fig. 2 is an enlarged explanatory view of the main part of the valve body of the first embodiment, Fig. 3 is a product diagram showing the configuration of the control device, and Fig. 4 5 is a front cross-sectional explanatory view of the automatic faucet according to the second embodiment, and FIG. 5 is a cross-sectional explanatory view taken along line 1-I in FIG. Water supply pipe Hot water supply pipe valve body Valve box 18): Movable valve hole 20): Fixed valve hole

Claims (1)

[Claims] 1) A fixed valve hole provided in the valve body (14) and a movable valve hole provided in the valve body (13) are communicated or closed by sliding of the valve body (13). An automatic faucet that opens and closes a valve, characterized in that the valve body (13) is moved periodically. 2) The automatic water dispenser according to claim 1, wherein the valve body (13) is provided at the confluence of the water supply pipe (11) and the hot water supply pipe (12), and is configured to discharge mixed hot water at a set temperature from the downstream side. plug. 3) The automatic faucet according to claim 1 or 2, characterized in that the operating range of the valve body (13) is within a range in which water is not discharged from the downstream side of the automatic faucet.