JPS62170296A - Automatic washing machine - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed description of the invention] Industrial applications The present invention relates to automatic washing machines for home use.

2. Description of the Related Art Conventionally, this automatic washing machine with a tub has 49 washers as shown in Fig. 5.
It has become 13a. That is, a reducer 2 is fixed to the lower part of an outer tank 1 for receiving water during dehydration, and this reducer 2 is connected to a motor 3 fixed to the lower part of the outer tank 1 by a belt. The drive shaft of the reducer 2 is of a two-shaft structure J3, and a dehydration tank 4, which is located inside the outer tank 1 and also serves as a washing tank, is fixed to the outer shaft. Dehydration I on the inner shaft
I! The outer tub 1 to which the agitating blades 5 located inside I4 are fixed is vibration-proofly supported from the washing machine main body 7 via a suspension 6 for vibration-proofing. It has the above configuration,
Conventional automatic washing machines automatically perform water supply, washing, drainage, and centrifugal dehydration.

Problems to be Solved by the Invention In such a conventional configuration, when the dehydration tank 4 is rotated for centrifugal dehydration, large vibrations are generated due to the unbalance caused by the unevenness of the clothes, which causes noise. has become,
SUMMARY OF THE INVENTION An object of the present invention is to provide a washing machine that can reduce noise and vibration caused by clothes being lopsided in an automatic washing machine.

Means for Solving the Problems The automatic washing machine of the present invention has a washing tub that also serves as a spin-drying tub located outside, and an outer tub that receives water during spin-drying and is elastically supported from the washing machine body via a suspension. Additionally, a partition plate is attached to the inner corner of the washing machine main body so as to form a sealed space, and a plurality of small holes are formed in the partition plate.

Function: According to this configuration, in the noise caused by the vibrations generated during the spin-drying process due to the unbalance caused by the unevenness of the clothes, approximately 3.
00 Hz noise is absorbed by the space provided at the corner, suppressing the generation of standing waves.

Moreover, since the washing machine itself is reinforced by the partition plate, noise and vibration are reduced.

EXAMPLE Hereinafter, an example of the present invention will be described based on FIGS. 1 to 4. Note that components having the same functions as those in FIG. 5 are given the same reference numerals and their explanations will be omitted.

1 and 2 show an automatic washing machine of the present invention, which differs from FIG. 5 in the following points. That is, partition plates 9 are fixed to four corners inside the washing machine main body 7 so as to create a sealed space 8 between them and the washing machine main body 7. This partition plate 9 is provided with a plurality of small holes 10.

With this structure, first, when the clothes and detergent to be washed are placed in the dehydration tank 4 and the electricity is turned on, a certain amount of water is supplied, and when the water supply is finished, the stirring blades 5 begin to rotate all at once to remove the clothes. Wash the clothes while stirring in the water tank 4. After washing for a certain period of time, draining and rinsing are repeated several times, and after draining, the spinner W14 rotates and the clothes are centrifugally dehydrated. Assume that during this dewatering process, unbalance occurs due to unevenness of clothes, etc., and the dehydrating tank and outer tank vibrate violently. First, a case in which there is no partition plate 9 will be explained.

This generated vibration causes the outer tank 1 to be washed by the suspension 6 W1! Since it is elastically supported by the main body 7, vibrations transmitted to the washing machine main body 7, the floor, etc. are considerably reduced.

However, regarding noise, noise caused by vibration is generated from the outside M1 and propagates to the outside through the gap 11 between the floor and the floor. This noise has various frequency components, but the noise around about 300H2 is the largest, and even if a bottom plate 12, which is indicated by a dotted line, is attached to the bottom of the main body as a soundproofing measure, it is not very effective. This is a major obstacle in creating low-noise washing machines. As a result of studying this type of noise, we found that a half-wavelength standing wave 13 as shown in FIG. In a washing machine, the frequency of the standing wave 13 is approximately 3
It becomes close to 00H2, and this standing wave causes 300H2.
Noise near tl z occurs. Focusing on the property that the sound pressure level of this standing wave is maximized at the internal corner of the washing machine main body 7, a space 8 with vBrJ] is formed in the internal corner of the washing machine main body 7 by the partition plate 9. However, the generation of the standing waves is suppressed in the following manner. In other words, due to the volume of the space 8 and the function of the small hole 10, this space 8 plays the role of a Helmholm type resonator, and if the volume and the size of the small hole are set appropriately, it is possible to resonate around 30011z. become. And the incident acoustic impedance at the corner is 3
It becomes very small near 0011z, and the sound is no longer reflected, and as a result, standing waves are suppressed. In addition, since the partition plate 9 is fixed to the washing machine main body 7, it serves as a reinforcing material.
The rigidity of the washing machine main body 7 is increased, vibration of the washing machine main body 7 is suppressed, and sound insulation properties are also improved.

As described in the detailed description of the invention, the automatic washing machine of the present invention is provided with a partition plate in the inner corner of the washing machine body so as to create a sealed space, and a plurality of small holes are provided in the partition plate. 30O
By suppressing standing waves near H2 and reinforcing the washing machine itself, sound insulation performance is improved, and as a result, noise during spin-drying can be reduced.

[Brief explanation of drawings]

Figure 1 is a plan sectional view of the automatic washing 'J1 machine of the present invention, Figure 2 is a front sectional view of Figure 1, Figure 3 is an explanatory diagram of how standing waves are generated, Figure 4 is the first, FIG. 2 is an enlarged sectional perspective view of a corner portion, and FIG. 5 is a partial sectional view of a conventional automatic washing machine. 1...Outer tank, 4...Dehydration tank, 6...Suspension, 7...Washing machine body, 8...Space, 9...Partition plate, 10...Small agent Mori Yoshihiro KiFigure 7Figure 3Figure 4

Claims (1)

[Claims] 1. An outer tub located outside the washing tub that also serves as a spin-drying tub to receive water during spin-drying is elastically supported from the washing machine main body via a suspension, and a sealed space is provided in the inner corner of the washing machine main body. This is an automatic washing machine with a partition plate attached so that multiple small holes are formed in the partition plate.