JP2676954B2 - Discharge port switching device - Google Patents

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a switching valve for supplying hot water to a shower, a currant, etc.

2. Description of the Related Art Conventionally, there has been an electrically driven switching valve of this type as shown in FIG. One of them has an inflow port 1, a first outflow port 2, and a second outflow port 3, and by rotating the motor 4 forward and backward, the ball valve 6 is rotated through the connecting shaft 5, and the opening of the ball valve 6 is performed. The flow path is switched according to the position of the two outflow ports 23. Teflon valve seat 7 is clamped from both sides of the two outflow ports 2 and 3 as valve seats for ball valve 6 so as to be clamped and connected. Due to this, the structure is kept airtight.

However, in the above-mentioned configuration, the valve seat 7 made of Teflon is likely to be swollen by hot water, the rotational resistance of the ball valve 6 may be increased, and the motor 4 may be inoperable.
Further, there are some cases where the sealing property is deteriorated due to abrasion or hardening.

The present invention solves the above-described conventional problems, and an object of the present invention is to provide a discharge port switching device that is simple in configuration, can stop water, and is mainly used for hot water.

Means for Solving the Problems In order to solve the above problems, a discharge port switching device according to the present invention includes a water shutoff valve that electrically opens and closes, and two discharge ports that are provided downstream of the water shutoff valve. And a water shutoff valve, and a controller for controlling the water shutoff valve.When the discharge port is switched, the controller drives the switch valve after closing the water shutoff valve. The configuration is such that the discharge port is switched.

With the above configuration, when the controller instructs switching from one discharge port to another, first the water shutoff valve is closed, and then the switching valve is driven to open the flow path to the desired discharge port. After that, the water shutoff valve is opened and the water is discharged from the discharge port.

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 a solenoid valve 8 for stopping hot water discharge, and a switching valve 9 downstream of the solenoid valve 8. The switching valve 9 has a first outflow passage 10 and a second outflow passage 11, and a first valve seat 12 and a second outflow passage 11 are provided at openings facing the two outflow passages 10 and 11, respectively.
Valve seat 13 is provided, and the first valve body 14 and the second valve body 15 are provided on the same valve shaft 16 corresponding to the two valve seat spaces 12 and 13, respectively. Is urged in a direction in which the valve body comes into contact with the first valve seat. The valve shaft 16 is connected to a plunger 18 and is attracted by a solenoid 19, but the plunger 18 is attracted by the plunger 18 even after the energization is stopped.
It has a magnet 20 which holds 18.

With the above configuration, when the instruction to switch the discharge port is issued, the controller
23, first closes the solenoid valve 8 and then temporarily supplies a current to the solenoid 19 to attract the plunger 18 against the spring 17. After that, even if the energization is released, the plunger 18 is held by the magnet 20. 2 valve bodies with valve stem 16
14, 15 move, firstly the valve body 14 separates from the first valve seat 12 and the first outflow passage 10 is opened, and conversely the second valve body 15 moves to the second valve seat 13 The second outflow passage 11 abuts and the second outflow passage 11 is closed. After that, the solenoid valve 8 is opened and the hot water flows through the first outflow passage 10,
Hot water is discharged from the first outlet 21.

On the other hand, when tapping hot water from the second outlet 22, the solenoid valve 8
Then, the current is temporarily passed through the solenoid 19, but the direction of the current is applied in the direction of canceling the magnetic field of the magnet 20, so that the force holding the plunger 18 disappears.
The spring 17 returns the two valve bodies 14 and 15 to their original positions. That is, first, the valve body 14 abuts the first valve seat 12 to close the first outflow passage 10, and conversely, the second valve body 15 separates from the second valve seat 13 and The outflow passage 11 of is opened.
After that, the solenoid valve 8 is opened, and hot water is controlled so as to flow through the second outflow passage 11 and be discharged from the second discharge port 22.

As described above, when switching the discharge ports 21 and 22, the switching valve is driven after the flow is always stopped.Therefore, the switching vibration that occurs when the pressure loss of the discharge port is large. It is possible to drive the switching valve with a small force without exhibiting a physical behavior, and since the self-holding solenoid 19 that holds the plunger 18 by the magnet 20 is used, the power consumption is small.

EFFECTS OF THE INVENTION As described above, the discharge port switching device of the present invention has the following effects.

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

(2) When switching the discharge port, after the flow is always stopped and the application of water pressure to the switching valve is reduced or becomes zero,
Since the switching valve is driven, the switching valve driving power consumption is small.

[Brief description of the 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, 22 ... Discharge port, 23 ...
… Controller

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Yukio Nagaoka 1006, Kadoma, Kadoma, Osaka Prefecture Matsushita Electric Industrial Co., Ltd. (72) Inventor, Fumikazu Shiba, 1006, Kadoma, Kadoma, Osaka In the company

Claims (2)

(57) [Claims] 1. A water shutoff valve that electrically opens and closes, a switching valve that is provided downstream of the water shutoff valve and that switches the flow to two discharge ports, and a controller that controls the water shutoff valve and the switching valve. The discharge port switching device is configured such that, when switching the discharge port, the controller closes the water stop valve and then drives the switching valve to switch the discharge port. 2. A switching valve comprising a valve body for switching the flow between two discharge ports, a spring for urging the valve body, a valve shaft, a plunger connected to the valve shaft, and a plunger against the spring. The discharge port switching device according to claim 1, further comprising: a solenoid that holds the plunger even after the power supply is stopped after the suction.