Method and apparatus for controlling beats and minimizing pulsat

Details Method and apparatus for controlling beats and minimizing pulsat Method and apparatus for controlling beats and minimizing pulsat

1998-12-07

2000-02-01

Norman, Marc

Refrigeration

Automatic control

Diverse, cascade or compound refrigeration-producing system

622284, 62296, F25B 700

Patent

active

060189576

ABSTRACT:
In a refrigeration or air conditioning system employing two positive displacement compressors, one compressor has its speed controlled to exactly match the speed of the other compressor whereby beats between pressure pulsations, structural vibrations and radiated sound are minimized.

REFERENCES:
patent: 3785167 (1974-01-01), Saha
patent: 4831836 (1989-05-01), Matsuoka
patent: 5117642 (1992-06-01), Nakanishi et al.
patent: 5125241 (1992-06-01), Nakanishi et al.
patent: 5127235 (1992-07-01), Nakanishi et al.
patent: 5203178 (1993-04-01), Shyu
patent: 5253486 (1993-10-01), Sugahara et al.
patent: 5507151 (1996-04-01), Ring et al.

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