Very low temperature refrigeration system with controlled...

Details Very low temperature refrigeration system with controlled... Very low temperature refrigeration system with controlled...

2005-01-18

2005-01-18

Jiang, Chen Wen (Department: 3744)

Refrigeration

Automatic control

Preventing, removing or handling atmospheric condensate

C062S278000, C062S196400

Reexamination Certificate

active

06843065

ABSTRACT:
Heating/defrost constructions of a very low temperature refrigeration system having a defrost supply circuit and a defrost return bypass circuit optimizing the heating/defrost cycle, preventing overload (excessive pressure) of its refrigeration process and protecting components from damaging temperatures. The defrost cycle operates continuously, when required, and provides a shorter recovery period between heating/defrost and cooling operating modes. The rate of the temperature change during cool down or warm up is controlled in an open loop fashion by controlled refrigerant flow in bypass circuits.

REFERENCES:
patent: 4535597 (1985-08-01), Missimer et al.
patent: 4597267 (1986-07-01), Forrest
patent: 6574978 (2003-06-01), Flynn et al.
patent: 6644067 (2003-11-01), Stenhouse

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