Refrigeration – Automatic control – Refrigeration producer
Patent
1977-11-18
1979-02-06
Bell, J. Karl
Refrigeration
Automatic control
Refrigeration producer
62324, F25B 1300, F25B 4100
Patent
active
041377265
ABSTRACT:
A capacity control system of compressor for heat-pump refrigeration unit including a bypass adapted to communicate the suction side of the compressor with a bypass port opened to a cylinder chamber of the compressor, and a valve mounted adjacent the bypass port for opening and closing the bypass. The valve is subject at the back thereof to the pressure of a refrigerant in a refrigerant passage which becomes a low pressure area in a cooling mode operation of the refrigeration unit and becomes a high pressure area in a heating mode operation of the unit, and the valve is caused to be automatically opened or closed by the change in the pressure, so that the performance of the compressor can be automatically controlled in such a manner that its capability is reduced in the cooling mode operation and increased in the heating mode operation.
REFERENCES:
patent: 2394166 (1946-02-01), Gibson
patent: 2904971 (1959-09-01), Kosfeld
patent: 3063251 (1962-11-01), Boehmer et al.
patent: 4017286 (1977-04-01), English et al.
Bell J. Karl
Daikin Kogyo Co. Ltd.
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