JPS5911759Y2 - washing machine - Google Patents

Description

[Detailed description of the invention] This invention relates to a washing machine that has multiple water supply routes for a single water supply source and can selectively switch between these routes to supply water to a predetermined location. be.

In particular, there are two-tub type washing machines in which water can be selectively supplied to a plurality of locations, for example, water can be supplied to the upper part of the washing tub, water can be supplied to the lower part of the washing tub, or water can be supplied to the spin-drying tub.

This water supply switching is generally performed using a closed type water supply switching device (see, for example, Utility Application No. 151107/1983 filed by the present applicant).

) is used, and each water intake port of this switching device is connected to each water supply port via a communication pipe.

In this case, the communication pipe that leads the water supply to the dehydration tank is generally thinner than the other communication pipes because the amount of ice formed therein is relatively small compared to the amount of water supplied from other water supply ports. It is being

For this reason, with this conventional device, for example, if you operate the switching device to switch from top water supply to dehydration tank water supply via a relatively long and thin communication pipe without lowering the tap water pressure, In some cases, the water pressure in the switching device increases due to the pipe resistance, causing the water supply hose to become disconnected from the water faucet.

Therefore, the purpose of this invention is to eliminate the above-mentioned drawbacks of the conventional device.

Hereinafter, embodiments of this invention will be described in detail with reference to the accompanying drawings.

This washing machine includes a washing tub 1 and a dehydrating tub 2, and an operating box 3 is attached to the top of these tubs as is well known.

A hydraulic buffer chamber 5 is integrally formed in the underframe 4 of the operation box 3.

This hydraulic buffer chamber 5 has an overflow plate 6 extending forward,
An upper water supply port 7 that opens toward the washing tub 1 is provided at the tip of the overflow plate 6.

Moreover, on the side of this overflow plate 6, an excess water receiving chamber 9 is connected with a weir plate 8 formed at a predetermined height in between.

This excess water receiving chamber 9 is provided with an excess water inlet 10 opened above the washing tub 1, and when water is supplied in excess of the appropriate amount of water especially during rinsing, the excess water is poured into the weir plate 8. water flows into the receiving chamber 9, and this water inlet 1
Water is poured into the washing tub 1 from 0.

This is called waste water, and water can be saved by adjusting the amount of water supplied so that no waste water flows out from the excess water inlet 10.

On the other hand, inside the operation box 3, there is a known sealed water supply switching device 11.
is provided.

The water supply switching device 11 shown in this embodiment includes a water supply cylinder 13 to which a water supply hose 12 from a water faucet is connected;
It is provided with two water intake ports 14, 15, and 16, and these water intake ports can be selectively switched by operating a switching lever 17.

In this case, the first water intake port 14 is opened directly toward the above-mentioned hydraulic buffer chamber 5, and the second water intake port 15 is connected to a lower water supply provided at the lower part of the washing tub 1 via a communication pipe 18. In addition, the third water intake port 16 is led to the upper part of the dewatering tank 2 via a communication pipe 20.

This communication pipe 20 is generally thinner than other communication pipes in relation to the amount of water supplied to the dehydration tank 2, but it is provided with a branch pipe 21 near the water supply switching device 11. There is.

This branch pipe 21 has a required effective diameter and is installed so as to rise almost perpendicularly to the communication pipe 20, but is bent back in an inverted U shape at a predetermined height, and its free end is It opens into the excess water receiving chamber 9.

The mounting position of the branch pipe 21 with respect to the communication pipe 20 and its effective diameter are related to each other, and the branch pipe 21 releases excessive pressure generated in the communication pipe 20 when water is supplied to the dehydration tank, and also removes excess water. is returned to the excess water receiving chamber 9.

Therefore, for example, from a state where the first water intake 14 is selected and water is being supplied from the upper water supply port 7, water can be removed via the relatively long and thin communication pipe 20 by operating the switching lever 17 without lowering the tap water pressure. Even if the water supply is switched to the water tank, the increase in water pressure caused by the pipe resistance is released to the outside via the branch pipe 21, and the water supply hose 12 will not come off as in the conventional case.

Further, when the amount of water supplied is excessive, the excess water is guided into the excess water receiving chamber 9 via the branch pipe 21 and is injected into the washing tub 1 as waste water from the water inlet 10.

It goes without saying that a branch pipe 21 may also be provided in the communication pipe 18 connecting the second water intake port 15 and the lower water supply port 19.

As is clear from the description of the embodiments described above, according to this invention, an inverted U-shaped branch pipe is installed upright in a communication pipe connected to a predetermined water supply port, thereby reducing the water resistance caused by pipe resistance. Increases in water pressure can be effectively suppressed, so there is almost no risk of the water supply hose coming off even if the water supply is switched inadvertently, unlike in the conventional case.

In addition, excess water in the water supply to the dewatering tank is returned to the excess water inlet adjacent to the upper water inlet, so it is possible to know whether excessive water is being supplied to the dewatering tank by checking the state of water being poured from this water inlet. It is convenient.

[Brief explanation of the drawing]

Fig. 1 is a schematic front view of a washing machine according to this invention, Fig. 2 is a sectional view taken along line II-II in Fig. 1, and Fig. 3 is a schematic front view of the washing machine according to the invention.
The figure is a sectional view taken along the line III--III in FIG. 1. In the figure, 1 is a washing tank, 2 is a dehydration tank, 3 is an operation box, 4 is an underframe, 7 is an upper water supply port, 8 is a weir plate, 10 is an excess water inlet, 1
1 is a water supply switching device; 18. 20 is a communicating pipe, 19 is a lower water supply port, and 21 is a branch pipe.

Claims (2)

[Scope of utility model registration request] (1) In a washing machine having a closed water supply switching device, which selectively switches the water supply to a plurality of water supply ports including an upper water supply port provided at the top of the washing tub, the water supply It is attached to a communication pipe connecting the switching device and a predetermined water supply port so as to stand up almost perpendicularly to the communication pipe, and is folded back in an inverted U shape at a predetermined height, and its free end. A washing machine characterized in that a branch pipe is provided which opens toward the washing tub side. (2) Utility model registration In claim (1), the upper water supply port includes an excess water inlet connected via a weir plate, and the free end of the branch pipe is directed toward the excess water inlet. A washing machine characterized in that the opening is opened.