JPS6040225Y2 - Electric washing machine drain valve device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a drain valve device for an electric washing machine, which is provided with a valve operating circuit that prevents the valve from being deformed due to careless operation.

In an electric washing machine, as shown in Fig. 1, after filling the washing tub 1 with water and setting the operating handle 11 to 1 wash cycle,
When the operating handle 11 is set to 1 drain, the drain valve bellows 2 at the bottom of the washing tub opens mechanically, and the water in the tub is drained through the drain hose 3.
is discharged to the outside through.

When washing is completed, the bellows 4 is deformed because the bellows 4 is left in the draining state without returning the operation from 1st draining to 1st washing.

Therefore, even if the drain valve bellows 2 and the valve body 5 are filled with water after one washing operation is performed again, phenomena such as water leakage occur from the gap between the drain valve bellows 2 and the valve body 5.

In this invention, a water pressure switch that is operated by water pressure is installed between the washing machine casing and the washing tub, and the drain valve bellows is operated electromagnetically by a plunger, and both operations are performed by an electric circuit via a relay. It is an object of the present invention to provide an electric washing machine that maintains a drain valve bellows in a normal position even after washing is completed and prevents water leakage caused by careless operation.

Embodiments of the electric washing machine of the present invention will be described below with reference to the drawings.

As shown in FIG. 2, the embodiment of the present invention is such that a circuit is closed between the mounting frame 7 of the washing machine casing 6 to which the washing tub 1 is attached and the washing tub 1 when the tub is filled with a specified amount of water. Waterproof type 2
A water pressure switch 8 with circuit-interlocked contacts 8', 8' is provided.

That is, the weight of the washing tub 1 filled with water lowers the washing tub, and the water pressure switch 8 operates to close the circuit, and when the water is drained and the water becomes lighter, the water pressure switch 8 opens the circuit.

Further, the drain valve bellows 2 of the valve body 5 provided halfway from the washing tub 1 to the drain hose 3 is connected to a plunger 9, and when current flows through the plunger 9, the plunger 9 operates the drain valve bellows 2 to open the valve. Let the water drain.

Further, a main switch 10 is attached to the operating handle 11 of the washing machine casing 6, which closes the circuit when changing from one wash cycle to one drain cycle.

FIG. 3 shows an electric circuit for operating the switch and valve of the present invention.

Now, when the power source 15 is turned on and the washing tub 1 is put into the washing tub 1, the contacts 8' and 8'' of the water pressure switch 8 are both closed due to its weight.

When the operating handle 11 is switched from 1 wash cycle to 1 drain cycle, the main switch 10 closes, current flows through the coil 13 of the relay 12 and activates it, and current also flows through the coil of the plunger 9, causing the plunger to The drain valve bellows 2 connected to 9 is opened to drain the water in the washing tub 1.

When the relay 12 operates, the relay contact 1
4 becomes a closed circuit, so even if the operation handle 11 is returned to the original 1 washing position and the main switch 10 is open, the water pressure switch 8 is closed, so the relay 12 is self-held.

When water flows from the drain hose 3 and drains from the washing tub 1, the water pressure switch 8 is opened, the current is cut off to the coil 13 of the relay 12 and the plunger 9, and the contact 14 of the relay 12 is also opened, and the water is drained. The valve of valve bellows 2 is closed.

If the operation handle 11 is not returned from 1st drain to 1st wash due to careless operation, in the circuit of the present invention, the main switch 10 remains closed at the drain position, so that the main switch 10 remains closed when the drain is finished. , by the operation of the water pressure switch 8,
The contacts 8', 8'' are opened, the plunger 9 is cut off, the drain valve bellows 2 is closed, and the trouble caused by the deformation of the bellows 4 is eliminated.

As described above, according to the present invention, the drain valve bellows 2 is a solenoid valve that operates electromagnetically, and the water pressure switch 8, relay 12, etc. that operate when the washing tub 1 is filled with water are used. Due to the operation of the electric circuit, the plunger 9 is automatically set to 1 when washing is completed.
It operates as if it were in a washing state, and thereby the drain valve bellows 2 is activated.

Therefore, it is possible to prevent the bellows from being deformed due to carelessness in the valve remaining in the drain state after washing is completed as in the prior art.

[Brief explanation of the drawing]

FIG. 1 is a cross-sectional view of a washing tub of a conventional electric washing machine, FIG. 2 is a cross-sectional view of a washing tub of an electric washing machine according to an embodiment of the present invention, and FIG. 3 is a circuit diagram of the present invention. Note that the symbols written in the drawings indicate the following. 6...
...Housing, 7...Mounting frame, 1...Washing tub, 8...Water pressure switch, 11...Operation handle, 10... ...Main switch, 12...
...Relay, 2...Drain valve bellows, 9...
... Plunger, 13 ... Coil, 14.
...Relay contact, 8'...1st contact of water pressure switch, 8'...2nd contact of water pressure switch
This is the point of contact.

Claims (1)

[Scope of utility model registration request] It consists of a water pressure switch installed between the mounting frame of the housing and the washing tub that operates depending on the amount of water, a main switch that works with the operating handle, and a plunger that connects and operates the relay and electromagnetic square-shaped drain valve bellows. A coil of the relay and the plunger are connected in parallel to a power source through a series connection of a first contact of the water pressure switch and the main switch, and a first contact of the relay and a first contact of the water pressure switch are connected in parallel to the main switch. A drain valve device for an electric washing machine comprising an electric circuit connected in series with two contacts.