Refrigerating machine

Details Refrigerating machine Refrigerating machine

2005-11-22

2005-11-22

Norman, Marc (Department: 3744)

Refrigeration

Automatic control

Refrigeration producer

C062S228300, C062S230000, C062S510000

Reexamination Certificate

active

06966194

ABSTRACT:
A refrigerating machine having a compressor driven by a motor. The motor incorporates an armature with an iron core having a cage type conductor and a permanent magnet which is magnetized so as to enable the motor to operate as a synchronous motor. A bypass passage is provided between a discharge side of the compressor and a suction side of the compressor, a shut-off valve is provided for opening and closing the bypass passage, a pressure detecting device is provided for detecting a discharge pressure from the compressor and a current detector is provided for detecting a value of drive current for the compressor. The shut-off valve is opened and closed in accordance with the discharge pressure and the value of the drive current.

REFERENCES:
patent: 6305187 (2001-10-01), Tsuboe et al.
patent: 6408645 (2002-06-01), Tsuboe et al.
patent: 2001/0050541 (2001-12-01), Yanashima et al.
patent: 2002/0026806 (2002-03-01), Tsuboe et al.
patent: 2002/0095950 (2002-07-01), Tsuboe et al.
patent: 2002/0140309 (2002-10-01), Yanashima et al.
patent: 2003/0056534 (2003-03-01), Tsuboe et al.
patent: 2003/0117753 (2003-06-01), Kato et al.
patent: 2004/0211213 (2004-10-01), Tsuboe et al.
patent: 2001-227778 (2001-08-01), None

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