Laundry treatment device

Abstract

The invention relates to a washing treatment device, comprising: a casing, a drum accommodated inside the casing, an outer cylinder for accommodating the drum, and a dynamic vibration absorber for absorbing vibrations of the casing. Vibration; the dynamic vibration absorber includes: a support plate, combined with the casing, a mass body, movably placed on the support plate, the mass body absorbs the vibration transmitted to the casing, and a support member , arranged between the mass body and the support plate, the support supports the mass body; the support is in line contact or point contact with the bottom surface of the mass body, so that the mass body has a small attenuation ratio.

Description

technical field [0001] The invention relates to a washing treatment device. Background technique [0002] In the case of household electrical appliances such as washing machines and dryers with a rotating drum inside, as the rotation speed (rpm) of the drum increases, the laundry thrown into the drum, that is, the load eccentricity, produces horizontal displacement. vibration force. [0003] In particular, during the dehydration process, during the increase in the rotation speed of the drum, excessive vibration occurs in which the horizontal vibration displacement of the cabinet rapidly increases at the resonance frequency of the cabinet of the washing machine. Also, when the drum is kept constant at the highest speed, normal vibrations that repeat the same vibrations to some extent are generated. [0004] Due to such excessive vibration, a phenomenon in which the washing machine oscillates to the left and right occurs while the rotational speed of the drum is increasing. ...

AI Technical Summary

Problems solved by technology

[0013] First, the viscoelastic member is placed on the bottom surface of the mass body, so the load of the mass body continuously acts on the elastic member, which may cause damage and performance degradation of the viscoelastic member

[0014] Second, when the mass body vibrates in the horizontal direction, since the viscoelastic member absorbs the vibration using the shear stress (shear stress) acting in the left-right direction, there is a disadvantage that the attenuation ratio is reduced and the excessive vibration cannot be effectively absorbed

[0015] In the patent specification of the above-mentioned prior art, it is described that vibration can be effectively absorbed in the entire rotation speed range of the drum, but in essence, although the dynamic vibration absorber disclosed in the above-mentioned prior art has the effect of absorbing normal vibration (continuous oscillation), However, the ability to absorb excessive vibrations with sudden increases in vibration displacement is significantly reduced

[0016] Third, since shear stress alternately acts on the viscoelastic member, there is a disadvantage that the viscoelastic member may be damaged and its life shortened.

As a result, horizontal vibrations acting on the washing machine cannot be effectively absorbed

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