Refrigeration system and method of operation therefor

Details Refrigeration system and method of operation therefor Refrigeration system and method of operation therefor

2006-02-14

2006-02-14

Norman, Marc (Department: 3744)

Refrigeration

Automatic control

Trapping and discharging refrigerant batches

C062S197000, C062S216000, C062S503000

Reexamination Certificate

active

06997000

ABSTRACT:
The object of the present invention is to prevent refrigerant from flowing out into a vehicle compartment due to damage to an evaporator or piping associated therewith. A solenoid valve is arranged at an inlet of an evaporator, and a check valve is arranged at an outlet of the evaporator. When operation of a system is to be stopped, the solenoid valve is closed while a compressor is kept operating for a predetermined time to suck out refrigerant from the evaporator to a downstream side of the check valve, so that during stoppage of the operation, the check valve prevents the refrigerant from flowing back into the evaporator. Thus, even if the evaporator arranged in the vehicle compartment or piping associated therewith is damaged, a situation where a large amount of refrigerant flows out of the evaporator into the vehicle compartment does not occur because no refrigerant remains in the evaporator, making it possible to prevent occupants in the vehicle compartment from being put in a grave situation.

REFERENCES:
patent: 3668883 (1972-06-01), Ruff et al.
patent: 5983657 (1999-11-01), Murata et al.
patent: 5996369 (1999-12-01), Hirota
patent: 6244059 (2001-06-01), Hill
patent: 6672090 (2004-01-01), Healy et al.
patent: 2002/0011073 (2002-01-01), Flynn
patent: 2002-147898 (2002-05-01), None
Copy of European Search Report dated Mar. 12, 2004.

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