JPH03181679A - Discharge port switching device - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a switching valve for supplying hot water to showers, washers, etc.

2. Description of the Related Art Conventionally, there has been an electrically driven switching valve of this type as shown in FIG. One has an inflow port 1 and a first outflow boat 2, and the second has an outflow boat 3. By rotating the motor 4 in forward and reverse directions, the ball valve 6 is rotated via the connecting shaft 5. The flow path is switched by adjusting the position of the opening to the two outflow boats 2.3, and tightens the Teflon valve seat 7 from both sides of the two outflow boats 2.3 as a valve seat for the ball valve 6. The attachments are combined to maintain airtightness.

Problems to be Solved by the Invention However, with the above configuration, the Teflon valve seat 7 is easily swollen by hot water, increasing the rotational resistance of the ball valve 6, and there is a risk that the motor 4 will not be able to drive it. In addition, there were cases where the sealing performance deteriorated due to wear and hardening.

SUMMARY OF THE INVENTION The present invention has been made to solve these conventional problems, and aims to provide a discharge port switching device that has a simple configuration, can be water-stopped, and is mainly used for hot water.

Means for Solving the Problems In order to solve the above problems, the discharge port switching device of the present invention includes:
It consists of a water stop valve that opens and closes electrically, a switching valve that switches the flow to two discharge ports provided downstream of the water stop valve, and a controller that controls the water stop valve and the switching valve. When switching the discharge port, the controller is configured to close the water stop valve and then drive the switching valve to switch the discharge port.

Operation With the above configuration, when the controller instructs to switch from one discharge port to another, it first closes the water stop valve, then drives the switching valve and opens the flow path to the desired discharge port. After that, the water is discharged from the discharge port by opening the water stop valve.

Embodiments Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings. FIG. 1 is a sectional view of a discharge port switching device according to an embodiment of the present invention.

In FIG. 1, there is an am valve 8 that stops the hot water output, and a switching valve 9 downstream of this solenoid valve 8. The switching valve 9 has a first
There are an outflow passage 10 and a second outflow passage 11, and a first valve seat 1 is provided at the opening facing the two outflow passages 10 and 11, respectively.
2. A second valve seat 13 is provided, and between the two valve seats 12.1
3, a first valve body 14 and a second valve body 15 respectively.
are provided on the same valve shaft 16, and are biased by a spring 17 in a direction in which the first valve element contacts the first valve seat. The valve shaft 16 is connected to a plunger 18 and is attracted by a solenoid 19, but after attracting the plunger 18, a magnet 2 that holds the plunger 18 even if the power supply is stopped.
It has 0.

With the above configuration, when the switching of the discharge port is instructed, the controller 2
1, first closes the solenoid valve 8, and then temporarily applies current to the solenoid 19 to close the plunger 18 and close the spring 17.
attract against. Even if the power is turned off after that, the magnet 20
The plunger 18 is held by this. The two valve bodies 14 , 15 move together with the valve stem 16 , first the valve body 14 leaves the first valve seat 12 to open the first outflow channel 10 , and conversely the second valve body 15 leaves the first valve seat 12 . is in contact with the second valve seat 13 and the second
The outflow passage 11 is closed.

Thereafter, the solenoid valve 8 is opened, and the hot water flows through the first outflow path 10 and is discharged from the first outlet 22.

On the other hand, when hot water is discharged from the second discharge port 23, the solenoid valve 8
After that, a current is temporarily passed through the solenoid 19, but the direction of the current is applied in a direction that cancels out the magnetic field of the magnet 20, so that the force holding the plunger 18 is lost, and the spring 17 causes the two valve bodies to 14.15 is returned to its original position. That is, first, the valve body 14 contacts the first valve seat 12 and the first outflow path 10 is closed, and conversely, the second valve body 15 separates from the second valve seat 13 and closes the first outflow path 10. The outflow passage 11 is opened.

Thereafter, the solenoid valve 8 is opened, the hot water flows through the second outflow path 11, and the hot water is controlled to be discharged from the second outlet 23.

As mentioned above, when switching the discharge ports 22 and 23, the flow is always stopped and then the switching valve is driven, so the vibration that occurs when switching occurs when the pressure loss at the discharge ports is large. Since the switching valve can be driven with a small force without exhibiting erroneous behavior, and because the self-holding solenoid 19 that holds the plunger 18 with the magnet 20 is used, power consumption is low.

Effects of the Invention As described above, the discharge port switching device of the present invention has the following effects.

ill It operates stably regardless of the shape (pressure loss) of the tip of the discharge port.

(2) When switching the discharge port, the configuration is such that the flow is always stopped and then the switching valve is driven;
Power consumption is low because it uses a self-holding solenoid that holds the plunger with a magnet.

[Brief explanation of drawings]

FIG. 1 is a sectional view of a discharge port switching device according to an embodiment of the present invention;
FIG. 2 is a sectional view of a conventional switching valve device. 8...Water stop valve, 9...Switching valve, 21.
...Controller, 22, 23...Discharge port.

Claims (2)

[Claims] (1) A water stop valve that opens and closes electrically, and a switching valve that switches the flow to two discharge ports, which is provided downstream of the water stop valve;
The controller includes a controller for controlling the water stop valve and the switching valve, and the controller is configured to, when switching the discharge port, close the water stop valve and then drive the switching valve to switch the discharge port. Discharge port switching device. (2) The switching valve includes a valve body that switches the flow to two discharge ports, a spring that biases the valve body, a valve stem, a plunger connected to the valve stem, and a suction force on the plunger that opposes the spring. 2. The discharge port switching device according to claim 1, further comprising a solenoid that holds the plunger even after the energization is stopped.