Air-conditioning system

Details Air-conditioning system Air-conditioning system

2008-06-13

2009-12-29

Norman, Marc E (Department: 3744)

Refrigeration

Automatic control

Refrigeration producer

C062S181000, C062S259200, C062S505000

Reexamination Certificate

active

07637117

ABSTRACT:
An air-conditioning system includes a refrigeration cycle and a control unit. The refrigeration cycle includes an electric compressor in which a compression mechanism for drawing a refrigerant therein for compression is integrated with an electric motor for driving the compression mechanism, and a motor drive circuit for driving the motor is cooled using an intake refrigerant drawn into the compression mechanism. The control unit provides operational control to the motor drive circuit and the refrigeration cycle. When the temperature of the motor drive circuit has exceeded a predetermined temperature, the control unit varies a condition of supplying air to exchange heat with the refrigerant flowing through the refrigeration cycle to thereby reduce the temperature of the intake refrigerant.

REFERENCES:
patent: 4320628 (1982-03-01), Okajima
patent: 6523361 (2003-02-01), Higashiyama
patent: 6688122 (2004-02-01), Matsuoka
patent: 2002/0108384 (2002-08-01), Higashiyama
patent: 2003/0230101 (2003-12-01), Iritani et al.
patent: 2004/0020227 (2004-02-01), Takemoto et al.
patent: 2003-136944 (2003-05-01), None
patent: 2003-139069 (2003-05-01), None
Office action dated Nov. 4, 2008 in Japanese Application No. 2004-050257.
Office Action dated May 26, 2006 in corresponding Chinese Application No. 2005-10008388.0 with English translation.

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