JPS6031671Y2 - washing machine - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a washing machine suitable for washing small amounts of laundry.

Conventionally, in washing machines that automatically perform each process from washing, rinsing, and spin-drying, the tub has a nearly circular shape because washing and spin-drying are done in the same tub, and the pulsator that moves the laundry is Mechanically, it is located in the center of the tank.

Therefore, in order to improve the washing performance and uneven washing, etc., in order to not only rotate the cloth but also reverse it (replace the cloth), multiple protrusions on the bottom are installed as in Japanese Patent Publication No. 48-40977. Or, as in Utility Model Publication No. 51-46310, a protrusion is provided on the side wall of the inner tank.

Furthermore, the tank was not only made into a simple cylindrical shape, but also
As in No. 1-46310, a flat part is provided on the side wall of the inner tank to give it a shape close to a polygon to improve cleaning.

However, when washing a small amount of laundry, simply making the inner tub side wall polygonal creates less resistance, allowing the washing water to rotate smoothly.

As a result, the cloth becomes entangled with the pulsator and rotates almost simultaneously with the pulsator, resulting in serious damage to the cloth, or the pulsator is exposed and water is splashed by the pulsator.

SUMMARY OF THE INVENTION In view of the above-mentioned drawbacks, an object of the present invention is to provide a washing machine in which the cloth does not become entangled in the pulsator when washing a small amount.

In the present invention, sloped surfaces that rise diagonally from the outer periphery of the pulsator to the wall surface of the inner tank are provided at the bottom corners of the inner tank at approximately equal pitches over the entire bottom circumference of the inner tank, and a cloth is formed between adjacent sloped surface sections. The sloped surfaces are spaced apart so as to form deep grooves with a width large enough to prevent them from getting wedged in, and the length of the sloped surface from the bottom of the inner tank is approximately 1/3 of the total height of the inner tank, and at least one of the sloped surface parts is It is characterized by having small protrusions formed on it.

Above, the present invention will be explained in detail based on the drawings of the embodiments.

In FIG. 1, an outer tub 2 is suspended from a hanging rod 3 on an outer frame 1 of the washing machine.

The push spring 4 is for buffering abnormal vibrations when starting dewatering.

A washing pulsator 6 is installed at the center bottom of the mortar-shaped inner tank 5.

A large number of dehydration holes 7 are provided on the side wall of the inner tank 5.

During dehydration, the washing liquid in the clothes is dehydrated from the dehydration hole 7 into the outer tub 2 by the centrifugal force caused by the rotation of the inner tub 5.

An inertia ring 8 is provided at the top of the inner tank 5.

At the bottom of the outer tank 2, a pulsator 6 and a motor 9 that provides power for rotating the inner tank 5 are provided.

The rotation of motor 9 is transmitted to pulley 12 via pulley 10 and V-belt 11.

The clutch 13 rotates the pulsator 6 during washing, and rotates the inner tub 5 during spin-drying.

When draining, the washing liquid in the outer tub 2 is drained out of the washing machine through a drain hose 15 by operating a drain valve 14.

A large number of grooves 16 are formed in the inner tank 2, as shown in FIGS. 1 to 3.

The grooves 16 are arranged radially around the outer circumference of the pulsator 6, as shown in FIG.

The groove 16 is set to a size that does not allow the cloth to get stuck in it.

As shown in FIGS. 2 and 3, the groove 16 is formed from the bottom 5a of the inner tank 5 to the side wall 5b.

Since these grooves 16 are provided at equal pitches, the grooves 16
An inclined surface portion 17 is formed between the two slopes 6.

This inclined surface portion 17 is provided with a pulsator 6 at the bottom corner of the inner tank 5.
It has a shape that rises diagonally from the outer periphery of the inner tank 5 to the wall surface of the inner tank 5.

Then, they are provided at approximately equal pitches over the entire circumference of the bottom of the inner tank 5.

Furthermore, the length of the inclined surface portion 17 from the bottom of the inner tank 5 is set to approximately 1/3 of the total height of the inner tank.

According to the above configuration, the rotation of the pulsator 6 causes the water flow X to rise through the groove 16 and the slope portion 1
A water flow Y rising through the pulsator 7 and a water flow Z rotating in the rotation direction of the pulsator 6 are generated.

When washing a small amount, the water flows X, Y, and Z generate a flow that circulates around the outside of the pulsator 6 in a spiral manner.

Due to this flow, the cloth spirally circulates around the outside of the pulsator 6 without riding on the pulsator 6.

Therefore, since the cloth does not get entangled with the pulsator 6, damage to the cloth is reduced.

Moreover, due to the action of the rising water flows X and Y, the pulsator 6 is not exposed from the washing water when washing a small amount.
There is less water splashing when washing a small amount.

4 to 5 show an embodiment of the invention.

That is, small protrusions 18 are provided on the four inclined surface portions 17.

These small protrusions 18 further promote the reversal of the cloth not only when washing a small amount but also when washing a rated load (when washing a large amount), thereby sufficiently eliminating uneven washing.

In addition, the small protrusions 18 do not need to be as large as in the conventional case (they can be extremely small) because the grooves 16 sufficiently prevent fabric damage and water splashing when washing a small amount.

6 to 8 are washing performance curve diagrams comparing the conventional example such as Japanese Patent Publication No. 48-40977 and the present invention.

In FIGS. 6 to 8, curves a1°a2. a3 is the performance curve according to the present invention, and is the performance range.

b3 is the performance curve according to the conventional example.

In addition, in the conventional example mentioned here, the inclined surface portion 17 and the groove 16
Refers to a structure that does not have

As for the cleaning efficiency, as shown in FIG. 6, the conventional example and the present invention show almost the same performance.

As shown in Figure 7, in the conventional example, uneven washing occurs due to the load amount (
In contrast, with the present invention, the load does not become extremely large even when the load increases.

As shown in Figure 8, in the conventional example, the fabric damage (fabric damage rate) becomes extremely large as the load decreases (a small amount of washing is done). In this invention, even if the load amount (cloth amount) becomes small, it does not become extremely large.

As described above, according to the present invention, when washing a small amount,
By generating a water flow that circulates around the outside of the pulsator in a spiral manner, it is possible to prevent cloth from getting entangled with the pulsator, thereby providing a washing machine with excellent washing performance against cloth damage.

[Brief explanation of the drawing]

1 to 3 show an embodiment of the present invention, in which FIG. 1 is a longitudinal sectional view, FIG. 2 is a plan view of the main part, and FIG. 3 is an enlarged sectional view of the main part. 4 to 5 show other embodiments of the present invention, in which FIG. 4 is a plan view of a main part, and FIG. 5 is a perspective view of a portion P in FIG. 4. Figures 6 to 8 show washing performance curve diagrams of the present invention and conventional examples, where Figure 6 is a cleaning curve diagram, Figure 7 is a washing unevenness curve diagram, and Figure 8 is a fabric damage curve diagram. . 5... Inner tank, 6... Pulsator, 16
...Groove, 17...Slope section, 18...
...Small protrusion.

Claims (1)

[Claims for Utility Model Registration] A device consisting of a cylindrical inner tank 5 with a bottom and a pulsator 6 rotatably disposed at the center of the inner bottom of the inner tank 5, wherein the pulsator is located at the bottom corner of the inner tank 5. From the outer circumference of 6 to the inner tank 5
Slanted surface portions 17 that rise diagonally over the wall surface are provided at approximately equal pitches over the entire circumference of the bottom of the inner tank 5, and deep grooves 16 having a width large enough to prevent cloth from getting wedged between adjacent sloped surface portions 17.
The slope portions 17 are spaced apart from each other so that the height of the slope portions 17 is approximately 1/3 of the total height of the inner tank 5 from the bottom of the inner tank 5.
A washing machine characterized in that a small protrusion 18 is formed on at least one of the inclined surface portions 17.