Compressor unit and refrigerator using the unit

Details Compressor unit and refrigerator using the unit Compressor unit and refrigerator using the unit

2006-11-14

2006-11-14

Norman, Marc (Department: 3744)

Refrigeration

Automatic control

Refrigeration producer

C062S230000, C417S014000

Reexamination Certificate

active

07134295

ABSTRACT:
A compressor unit includes a compressor, an inverter for driving the compressor, and an over-current protective device for protecting the inverter against an output over-current. A control part controls the output voltage of the inverter when the compressor is started based on a ambient temperature detected by a temperature sensor so that the input current of the inverter does not exceed the working current value of the over-current protective device having temperature characteristics varying according to the ambient temperature. Thereby, a start torque can be increased by increasing the output voltage of the inverter without operating the over-current protective device when the compressor is stated at a low temperature when a start load is increased.

REFERENCES:
patent: 4179899 (1979-12-01), Katayama
patent: 4736595 (1988-04-01), Kato
patent: 5709098 (1998-01-01), Itoh et al.
patent: 6065298 (2000-05-01), Fujimoto
patent: 4-313645 (1992-11-01), None
patent: 6-193945 (1994-07-01), None
patent: 2000-227074 (2000-08-01), None

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