JP7271067B2 - electronic mixer tap - Google Patents

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electronic mixer faucet for controlling hot water discharge from a faucet of a bathroom or the like or a shower.

For example, in a bathroom or the like, a plurality of taps for faucets, showers, and other hot water outlets are provided. Conventionally, opening and closing of these hot water outlets was performed manually. For example, when closing a faucet in hot water supply state, the hot water supply was stopped by manual operation. In this way, when hot water is stopped by manual operation, the opening of the passage through which hot water passes is narrowed manually, so the opening of the passage is not closed instantaneously, but is continuously narrowed at a certain speed. be done. Therefore, the flow velocity of the hot water during hot water supply is not abruptly decelerated. Therefore, water hammer is reduced (see Patent Document 1, for example).

On the other hand, when an electromagnetic on-off valve is provided in the passage through which hot water flows and the discharge of hot water is stopped by closing the on-off valve, the flow speed of hot water is rapidly reduced by closing the on-off valve, which causes water hammer. do.

JP 2012-13243 A (Fig. 1)

In recent years, hot water and cold water are mixed to generate hot water at a desired water temperature, and an electromagnetic on-off valve as described above is provided in the passage of the mixed hot water, and a switch provided separately is operated. Therefore, a so-called electronic mixer faucet is being proposed, in which such an on-off valve is opened and closed to switch the discharge state of hot water. However, although water hammer is unlikely to occur when the on-off valve is opened, water hammer may occur when the on-off valve is closed as described above, and there is a high risk of damage to the electronic mixer tap.

On the other hand, when mixing the hot water and the cold water, it is necessary to adjust the mixing ratio of the hot water and the cold water in order to generate hot water at a desired temperature. Therefore, it is necessary to interpose an adjusting mechanism called an electric water volume valve (hereinafter referred to as a water volume servo) which can continuously adjust the opening degree in each of the hot water passage and the cold water passage. In the case where the water volume servos are provided in this way, before closing the on-off valve, the opening of both water volume servos is narrowed to slow down the flow rate of hot water passing through the on-off valve. By closing the valve, the occurrence of water hammer can be reduced.

However, if the opening of the water volume servo is throttled each time the on-off valve is closed, in addition to adjusting the flow rate of hot and cold water, the opening of the water volume servo must be changed each time the on-off valve is opened and closed. , the service life of the water quantity servo is shortened. Also, if both water volume servos are throttled, the on-off valve cannot be opened until it returns to the original opening. Since it is necessary to set the value to zero and return to the origin, it takes a long time to open the on-off valve again, resulting in poor usability.

Therefore, in view of the above-mentioned problems, the present invention provides an electronically mixed water system that is less likely to cause water hammer when closing the on-off valve, extends the service life of the water volume servo, and can quickly open the on-off valve again. The object is to provide a stopper.

In order to solve the above problems, an electronic mixer tap according to the present invention comprises a first water volume servo for increasing or decreasing the flow rate of hot water and a second water volume servo for increasing or decreasing the flow rate of cold water. and cold water are mixed and supplied to the outlet via an electromagnetic on-off valve, a third water volume servo is provided upstream of the on-off valve, and the hot water and the hot water are provided through the third water volume servo A water flow mixed with cold water flows into the on-off valve, and when the on-off valve is closed, the on-off valve is closed by restricting the opening degree of the third water quantity servo in advance. It is characterized by reducing water hammer that sometimes occurs.

By throttling the third water quantity servo when the on-off valve is closed, the amount of water when the on-off valve is closed is slowed down to reduce water hammer. Since only the third water volume servo is throttled, there is no need to change the opening degrees of the other first water volume servo and second water volume servo.

In order to reduce water hammer, it is not necessary to make the flow velocity completely zero when the on-off valve is closed. Therefore, when closing the on-off valve, the opening degree of the third water quantity servo may be reduced to a predetermined opening degree, and the on-off valve may be closed in a state in which the valve is not completely closed.

Further, when the on-off valve is opened, it is not necessary to completely return the amount of water to the amount immediately before it closes. Therefore, the degree of opening of the third water quantity servo is increased while the on-off valve is closed, and the opening of the on-off valve is prohibited until the degree of opening of the third water quantity servo reaches a predetermined reference degree of opening. It may be configured to

As is clear from the above description, the present invention can reduce the occurrence of water hammer as much as possible when the electromagnetic on-off valve is provided in the electronic mixer tap when the on-off valve is closed. .

A diagram showing the configuration of an embodiment of the present invention. Flow diagram showing the opening and closing timing of the opening and closing valve of the electronic mixer tap

Referring to FIG. 1, 1 shows an example of an electronic mixer tap according to the present invention. The electronic mixer faucet 12 is provided with a first water volume servo 11 for increasing or decreasing the flow rate of cold water from the water supply pipe 2 and a second water volume servo 12 for increasing or decreasing the flow rate of hot water from the water heater 3 . These two first and second water volume servos 11 and 12 can continuously increase and decrease the opening, and have a valve closing function that completely closes the rotation when the opening is further reduced. . Cold water and hot water that have passed through the first and second water quantity servos 11 and 12 flow into the mixing tank 13 and are mixed in the mixing tank 13 . A temperature sensor (not shown) is provided in the mixing tank 13, and the first and second water volume servos 11 and 12 are operated so that the water temperature after mixing becomes the water temperature set by the remote controller 4 described later. The degree of opening is controlled by the control device 5 .

Hot water mixed to a predetermined temperature in the mixing tank 13 passes through a third water quantity servo 10 provided downstream of the mixing tank 13, and then flows through a plurality of branch pipes 141, 142, 143 provided in parallel with each other. , 144 . Although four branch pipes are shown in this embodiment, the number of branch pipes is not limited to four, and may be increased as necessary.

Electromagnetic on-off valves 151, 152, 153, 154 are provided in the branch pipes 141, 142, 143, 144, respectively. These on-off valves are called latch valves, which receive a pulse signal from the control unit 5 when switching the on-off valve state, and after the on-off valve state is switched, the signal from the control unit 5 stops. It is configured to maintain the open/close valve state after switching even when the valve is switched. Outlets of the branch pipes 141, 142, 143 and 144 are provided with discharge ports A1, A2, A3 and A4, respectively. These outlets are not limited to a specific form. For example, in the present embodiment, A1 is a drain, A2 is a hand shower, A3 is a discharge port for discharging residual water and cold water, and A4 is a discharge port. It is set as an additional outlet.

The operation switches 401, 402, 403, 403, 403, 403, 403, 403, 403, 403, 403, 403, 403, 403, 403, 403, 403, 403, 403, 403, 403, 403, 403, 403, 403, 403, 403, 403, 403, 403, 403, 44, 44, 44, 44, 44, 44, 44, 44, 44, 44, 44, respectively, respectively, respectively, respectively, from the four discharge ports A1, A2, A3, A4. 404 is pushed, and the control unit 5 is configured to perform the push operation. The remote controller 4 is also provided with two temperature setting switches 41. By operating the temperature setting switches 41, the above two first and second water volume servos 11 and 12 are controlled. is adjusted. The temperature set by both switches 41 is displayed on the display unit 42, and the LED 43 lights up in blue until the displayed water temperature is reached, and when the water temperature reaches the set temperature, the LED 43 lights up. The color switches from blue to orange. When the water temperature in the mixing tank 13 is low, low-temperature hot water is not discharged from the faucet (A1) or the hand shower (A2). Therefore, even if the second water quantity servo 12 is opened, new hot water from the hot water supply device 3 does not flow into the mixing tank 13 . In such a case, the control unit 5 opens the solenoid valve 153 so that the low-temperature hot water in the mixing tank 13 is discharged from the discharge port A3 until the water temperature in the mixing tank 13 reaches the set water temperature. Control.

The contents of control of the electronic mixer faucet 1 configured as described above by the control unit 5 will be described with reference to FIG. The first state is a state in which all the solenoid valves are closed and hot water is not being discharged from any outlet. In this state, when any operation switch of the remote controller 4 is pushed (S1), the control unit 5 opens the on-off valve corresponding to the pushed operation switch (S2).

Next, when an operation switch other than the previously pushed operation switch is pushed, the on-off valve corresponding to the newly pushed operation switch is opened (S3, S4). It should be noted that when the previously pushed operation switch is pushed again and the open solenoid valve corresponding to that operation switch is closed, the solenoid valve is not immediately closed. The degree of opening of the third water quantity servo 10 is throttled, the flow velocity of the hot water passing through the open solenoid valve is decelerated (S6, S7), and the open solenoid valve is opened when the flow velocity is sufficiently reduced. The valve is closed (S8). At this time, it is not necessary to reduce the opening of the third water quantity servo 10 until the flow rate becomes zero. The on-off valve may be closed when the degree of opening is reduced. Then, when the on-off valve is closed, the degree of opening of the third water volume servo 10 is restored so that a sufficient amount of water is ensured when one of the on-off valves is opened (S9). However, instead of prohibiting the opening of any of the on-off valves until the water volume is completely recovered, when the opening of the third water volume servo 10 returns to the preset opening, the opening of the on-off valves is allowed thereafter. control to allow.

After the new on-off valve is opened in S4, the electromagnetic valve that is opened first and has already been opened at that time is closed (S5). At this point, the solenoid valve that was opened first is closed, and after that, a new solenoid valve is opened, but when it returns to S3, it is opened as a new on-off valve. The solenoid valve becomes a predetermined open/close valve in FIG. 2, and the solenoid valve that is opened after that, that is, the third solenoid valve becomes a new solenoid valve. Therefore, for example, in the figure, No. 1 (401) operation switch is first pushed, and when the on-off valve 151 is opened, for example, No. 1 (401) is pressed. When the operation switch 2 (402) is pushed, the on-off valve 151 is closed after the on-off valve 152 is opened. When another operation switch is pushed while the on-off valve 152 is open, the on-off valve 152 is closed after the electromagnetic valve corresponding to the pushed operation switch is opened. It will be. In this way, even if water hammer occurs in a state where the other on-off valves are open when one of the solenoid valves is closed, abnormal pressure due to water hammer is released from the open on-off valve. Therefore, there is no need to narrow the opening of the third water quantity servo 10. Therefore, when the operation switch 402 is pushed while the on-off valve 152 is open, the third water quantity servo 10 is turned on before the electromagnetic valve 152 is closed because the other on-off valves are not open. will narrow down the opening of the

It should be noted that the present invention is not limited to the embodiments described above, and various modifications may be made without departing from the gist of the present invention.

1 electronic mixer faucet 2 water pipe 3 hot water supply device 4 remote controller 5 controller

Claims (3)

Equipped with a first electric water volume valve (hereinafter referred to as a water volume servo) for increasing/decreasing the flow rate of hot water and a second water volume servo for increasing/decreasing the flow rate of cold water. A state in which a third water volume servo is provided upstream of the on-off valve, and the hot water and the cold water are mixed through the third water volume servo in the electronic mixer faucet that supplies water to the outlet via an electromagnetic on-off valve. water flows into the on-off valve, and when the on-off valve is closed, the degree of opening of the third water volume servo is reduced prior to closing the on-off valve, thereby reducing water hammer that occurs when the on-off valve is closed. An electronic mixer tap characterized by 2. The on-off valve according to claim 1, wherein when the on-off valve is closed, the degree of opening of the third water quantity servo is reduced to a predetermined degree of opening, and the on-off valve is closed without being completely closed. electronic mixer tap. increasing the degree of opening of the third water quantity servo while the on-off valve is closed, and prohibiting the opening of the on-off valve until the degree of opening of the third water quantity servo reaches a predetermined reference degree of opening; The electronic mixer tap according to claim 1 or 2, characterized by:

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