Refrigerating cycle device capable of ensuring oil return

Details Refrigerating cycle device capable of ensuring oil return Refrigerating cycle device capable of ensuring oil return

2008-05-13

2008-05-13

Norman, Marc (Department: 3744)

Refrigeration

Automatic control

Refrigeration producer

C062S157000, C062S227000

Reexamination Certificate

active

11180511

ABSTRACT:
Whether or not a flow rate of a circulating refrigerant is higher than a predetermined threshold value is judged and when the flow rate is higher than the predetermined threshold value, the discharge flow rate of a compressor11is controlled in accordance with the degree of cooling of a front seat evaporator9and when the flow rate is lower than the predetermined threshold value, the discharge flow rate of the compressor11is controlled so as to intermittently change between a discharge flow rate near the predetermined threshold value and a flow rate of substantially zero and the operation time of the compressor11during the period of that control is measured and when the compressor operation time exceeds a predetermined time, the compressor is continuously controlled in accordance with a discharge flow rate near the predetermined threshold value.

REFERENCES:
patent: 6266967 (2001-07-01), Honda
patent: 6675595 (2004-01-01), Ohya
patent: 6807818 (2004-10-01), Yoshida et al.
patent: 2004/0107716 (2004-06-01), Hirota
patent: A-2000-283576 (2000-10-01), None

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