Variable damping damper, washing machine provided with damper and control method

Abstract

The invention discloses a variable damping damper, a washing machine provided with the damper and a control method. The damper comprises a damper shell and a movable piece inserted in the damper shell. The inner wall of the damper shell is provided with an air bag capable of stretching and contracting in the radial direction, and the air bag communicates with an air pump structure through an air conveying pipe and a backflow pipe. The air pump structure blows airflow into the air bag from the air conveying pipe along with the telescopic movement of the movable piece, and after gas in the air bag reaches the set value, the gas flows back to the air pump structure from the backflow pipe, the radial stretching amount of the air bag is changed, and accordingly friction force between the air bag and the movable piece is adjusted. The variable damping damper is preferably used for the washing machine but not limited to the washing machine and can be applicable to other structures needing toobtain different damping according to different piston motion directions, and the structures include a piston type engine, an air compressor, a tamping machine and other reciprocated vibrating work systems.

Description

technical field [0001] The invention relates to a shock absorber, in particular to a variable damping shock absorber and a washing machine equipped with the shock absorber, and also relates to a control method applied to the washing machine. Background technique [0002] Existing drum-type washing machines include a casing forming an appearance; a washing tub arranged in the casing for storing washing water; a drum rotatably arranged in the washing tub for washing and dehydrating clothes; The back of the washing tub is connected to the drive motor of the rotating shaft of the drum. A door through which laundry is put in or taken out is rotatably provided on the front surface of the housing, and a bracket for supporting a rotating shaft of the drum is provided behind the washing tub. A spring is fixed to the housing at an upper portion of the tub, and a shock absorber for attenuating vibration transmitted from the drum to the tub is provided at a lower portion of the tub. ...

AI Technical Summary

Problems solved by technology

[0003] Those skilled in the art know that in the shock absorber of the drum type washing machine, the vibration amplitude and Noise sources are quite different and thus limited in effectively damping large and small amplitude vibrations

In the shock absorber of the existing drum type washing machine, the friction force of shock absorption is basically constant at all times, and the change and adjustment of the damping cannot be realized

[0004] At present, there is almost no external energy supply and no external sensor to adjust the damping force in real time according to the amplitude of the outer drum of the washing machine and automatically improve the anti-eccentricity of the machine The damping device; and the passive dampers used in the existing technical solutions are mostly unable to be widely used due to insufficient damping force or the need for external air sources.

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