JPH0133023Y2 - - Google Patents

Description

[Detailed Description of the Invention] <Technical Field of the Invention> The present invention relates to a washing machine, and particularly relates to structural improvement of a drainage device of a washing machine.

<Prior Art> As a conventional example of this type of device, there is one constructed as shown in FIGS. 1 and 2, for example.

In the figure, 1 is a washing tub, 2 is a strainer plate having a large number of through holes and arranged in the washing tub 1, 3 is a flexible overflow hose, 4 is a water pipe connected to the overflow hose 3, Reference numeral 5 denotes a valve body attached to the lower end of the overflow tube 4, which functions as an on-off valve for the drain port 1a, which is opened on the bottom wall of the washing tub 1 with a substantially horizontal opening surface, and is connected to the valve seat surface, that is, the drain port 1a. The lower end surface of the rib 5a comes into contact with the upper surface of the peripheral edge of the rib 5a. The valve body 5 is made of rubber, for example, and has a roughly cylindrical shape with a rib 5a that widens downward, and is moved up and down together with the overflow pipe 4 to open and close the drain port 1a.
This vertical movement is achieved by manually moving a spring 6 attached to the outer periphery of the overflow pipe 4 and urging it downward, and a drain rod 7 lifting it upward against the urging force of the spring 6. be manipulated. 8 is a drain hose connected to the drain port 1a, and 9 is a rotary blade.

However, in this conventional device, the drain port 1a
Since the position of the washing tub 1 is lower than the bottom of the washing tub 1, dirt and lint may remain near the drain port 1a as shown in the second diagram during the latter stage of drainage, causing water leakage, etc.
There was a problem in that the valve body 5 could not smoothly open and close the drain port 1a.

Furthermore, in order to solve such problems,
It is also known that the area around the drain port is raised one step higher to prevent sand, etc. from remaining on the valve seat surface, but in this case, the water that is not drained always remains at the bottom, so it will not work for a long time. After all, a large amount of dirt, etc. will remain at the bottom, and eventually, the dirt, etc. will also remain on the raised valve seat surface, impairing the reliability of the opening and closing operation, and causing the dirt, etc. remaining at the bottom to deteriorate. There are problems such as backflow into the washing tub 1 during washing and adhesion to the laundry.

<Summary of the invention> The present invention was developed by focusing on the conventional situation, and includes a drainage outlet located directly above the drainage outlet opened in the bottom wall of the recess provided in the bottom wall of the washing tub. A guide passage for guiding drainage is provided, which consists of a first drainage channel with an outlet opening and a second drainage channel with a drainage outlet opening at a side position of the drainage outlet. The structure is configured so that the water flow from the side and the water flow from the side occur at the same time, so that there is no dirt or sand remaining around the drain outlet, especially on the valve seat surface, and this allows the valve body to smoothly open and close the drain outlet. The aim is to provide a highly reliable washing machine that can be used in

<Embodiment of the invention> Hereinafter, one embodiment of the invention will be described in detail based on the drawings from FIG. 3 onwards. Note that the same reference numerals are given to the same components as in the conventional example to simplify the explanation.

In FIG. 3 illustrating a guide passage 10 for guiding drainage, which has a drain port 1a at the bottom wall of a recess provided at a corner of the bottom wall of the washing tub 1, 11 indicates the drain port 1.
This is a cylindrical first drainage channel extending vertically directly above a, through which an overflow pipe 4 with a valve body 6 attached to its lower end can be freely moved up and down, and its upper end opening is connected to the first drain port 1.
1a and the lower end opening are located directly above the peripheral upper surface (valve seat surface) of the drain port 1a as the first discharge port 11b. 12 is a cylindrical second drainage channel with an L-shaped longitudinal section;
The upper end opening is opened as a second drain port 12a on the upstream side of the first drain port 11a, and the lower end opening is opened as a second discharge port 12b at a side position of the valve seat surface. The opening is positioned substantially perpendicular to the opening surface. In addition, the opening surface of this drain port 1a, the first drain port 11a, the second drain port 12a, and the first drain port 1a are connected to each other.
The respective opening surfaces of the discharge ports 11b are configured approximately horizontally, and the first and second drain ports 11
The opening surfaces of a and 12a are configured to be substantially flush with each other, and at the same time, they are configured to open at a position lower than the inner bottom wall surface of the washing tub 1. Furthermore, the guide passage 10 is formed by a first drainage channel 11 and a second drainage channel 12.

Next, the action will be explained.

When water is supplied into the washing tub 1, the valve body 5 always closes the drain port 1a by the downward biasing force of the spring 6, so that the water stays in that state.

On the other hand, when draining water, the valve body 5 moves upward by pulling up the drain rod 7 by hand or the like.
The drain port 1a is opened and the water in the washing tub 1 is drained.

During this draining, the strainer plate 2 is
As shown in FIG. 4, the sediment or lint that remains in the vicinity of the drain port 1a through the through holes and the first drainage channel 11 and the second drainage channel 12 is removed from the first drainage channel as shown in FIG. 11 and the second drainage channel 12, the water is discharged to the outside from the drain port 1a via the drain hose 8 along with the waste water so as to be caught in the waste water.

At this time, the flow of the waste water near the drain port 1a is caused by the force of water falling from above into the drain port 1a through the first drain channel 11 and the second drain channel 12, as shown by the arrow in FIG. Since it is formed by water flows from two different directions, with the force of water flowing into the drain port 1a from the side through the drain port 1a, it is possible to more reliably guide the sediment, etc. staying near the drain port 1a to the drain port 1a. Can be discharged to the outside.

For this reason, it is possible to eliminate problems that occur in the prior art, such as dirt and sand remaining on the valve seat surface, which prevents smooth contact between the valve body and the valve seat surface, and to improve reliability.

According to this embodiment, since the second drain port 12a is provided upstream of the first drain port 11a, the sediment, etc. flowing in the latter half of the drainage period when the water pressure is particularly weak, is removed from the second drain port. It can be quickly guided from 12a toward the drain port 1a. In addition, even when the water pressure is particularly weak, the second drainage channel 12 is bent into an L-shape, so that earth and sand can be temporarily retained on the almost horizontal bottom wall surface. This prevents the dirt and the like from remaining near the drain port 1a, that is, on the valve seat surface, and prevents it from flowing back into the washing tub 1.

<Effects of the invention> As explained above, according to the invention, the guide passage for guiding drainage including the first drainage channel and the second drainage channel is connected to the bottom wall of the recess provided in the bottom wall of the washing tub. The structure is such that the water near the drain outlet flows from two directions, upward and sideways, so that dirt, etc. does not accumulate near the drain outlet, especially on the valve seat surface. Therefore, it is possible to provide a highly reliable drainage device for a washing machine in which the valve body can smoothly open and close the drain port, and water leakage does not occur.

[Brief explanation of the drawing]

Figure 1 is a plan view of the washing tub, Figure 2 is A of Figure 1.
- A configuration diagram showing a conventional example of the A cross section, Figure 3 is the first
4 and 5 are enlarged sectional views of the main parts of FIG. 3, and FIG. 4 is an explanatory diagram when the valve is closed. FIG. 5 is an explanatory diagram when the valve is opened. 1...Washing tub, 1a...Drain port, 5...Valve body,
5a...Rib, 10...Guidance passage, 11...First
Drainage channel, 11a...first drain port, 11b...first
Discharge port, 12...second drain channel, 12a...second drain port, 12b...second discharge port.

Claims (1)

[Scope of utility model registration request] The water in the washing tub is selected from a drain opening formed in the bottom wall of a recess provided in the bottom wall of the washing tub, which forms a substantially horizontal opening surface, by opening and closing operations of a valve body installed in the drain opening. A drainage device for a washing machine that drains water to the outside, the upper end opening at a position directly above the drain port on the bottom wall of the washing tub, and the lower end opening at a position directly above the valve seat surface of the drain port in a vertical direction. a first drainage canal extending to;
An upper end opens on the bottom wall of the washing tub on the upstream side of the first drainage channel end opening so as to be substantially flush with the upper end opening surface of the first drainage channel, and a lower end is located on the side of the valve seat surface of the drain port. A drainage device for a washing machine, characterized in that a guide passage for guiding drainage is provided, the second drainage channel opening into the drain.