Low noise refrigerator and noise control method thereof

Details Low noise refrigerator and noise control method thereof Low noise refrigerator and noise control method thereof

1990-12-14

1992-06-02

Wayner, William E.

Refrigeration

Processes

Compressing, condensing and evaporating

62296, 181206, 381 71, F25D 1900

Patent

active

051176424

ABSTRACT:
In a low noise refrigerator, a compressor constituting a noise source is arranged within a machine chamber provided with an opening in one location, which chamber has a one-dimensional duct construction in which its cross-sectional dimension is small relative to the wavelength of the noise which is to be reduced. A vibration pick-up is located in the vicinity of the compressor. The vibration pick-up detects compressor vibrations which correlate to the compressor noise of the compressor. There is provided a control circuit that processes the output signal of the vibration pick-up. In the machine chamber, a sound generator is driven by the output signal of the control circuit to generate a control sound, so that the compressor noise which tries to issue from the opening is canceled by the control sound.

REFERENCES:
patent: 2043416 (1936-06-01), Lueg
patent: 4025724 (1977-05-01), Davidson, Jr. et al.
patent: 4153815 (1979-05-01), Chaplin et al.
IBM Technical Disclosure Bulletin vol. 31 No. 8 Jan. 1984.

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