Operation control device for cooling apparatus

Details Operation control device for cooling apparatus Operation control device for cooling apparatus

2005-08-23

2005-08-23

Norman, Marc (Department: 3744)

Refrigeration

Automatic control

Refrigeration producer

C062S215000, C062S229000

Reexamination Certificate

active

06931872

ABSTRACT:
An electric motor25for driving a compressor21that composes a refrigerating cycle is speed-controlled by an inverter circuit31. When an inside temperature Tx detected by an inside temperature sensor35is not less than a predetermined temperature (for example, 5° C. in the case of a refrigerator and −18 C in the case of a freezer), a microcomputer34suppresses the rotational speed of the electric motor25via the inverter circuit31to thereby restrict current flowing through the electric motor25and a power circuit40. Accordingly, great current does not flow through the electric motor25upon the start of the operation in a refrigerator or a freezer. Further, in this case, the rotational speed of the electric motor25is controlled to be increased as the inside temperature Tx becomes lower, whereby the cooling speed of the inside10is increased with the current flowing through the electric motor25prevented from increasing.

REFERENCES:
patent: 4722196 (1988-02-01), Ishikawa
patent: 5499511 (1996-03-01), Hara et al.
patent: 5709098 (1998-01-01), Itoh et al.
patent: 2002/0170305 (2002-11-01), Nakajima

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