Compressor device and control method for the same

Details Compressor device and control method for the same Compressor device and control method for the same

2005-02-01

2005-02-01

Tapolcai, William E. (Department: 3744)

Refrigeration

Processes

Compressing, condensing and evaporating

C062S230000, C417S222200

Reexamination Certificate

active

06848262

ABSTRACT:
A compressor device for a refrigerant cycle includes a compressor and a control unit. The compressor is provided with a displacement changing mechanism for changing its displacement. The control unit changes a current value supplied to the displacement changing mechanism, thereby relatively changing the displacement of the compressor. In the compressor device, when a rotational speed of a vehicle engine is lower than a predetermined rotational speed, the control unit controls an upper limit of the current value between a first predetermined value and a maximum value. Accordingly, a displacement specification of the compressor device can be normalized for vehicle engines having different power outputs, while engine stall can be prevented.

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