Freezer-refrigerator

Details Freezer-refrigerator Freezer-refrigerator

1988-04-29

1990-01-09

Tanner, Harry B.

Refrigeration

Automatic control

Refrigeration producer

62157, 62180, 62272, F25B 500, F25D 1700

Patent

active

048919527

ABSTRACT:
A refrigerator comprising a refrigeration cycle which comprises a compressor, condenser, first capillary tube and first cooler connected into a loop, and a quick freezing refrigerant circuit connected in parallel with the first cooler and comprising a second capillary tube and a second cooler connected in series therewith. The refrigerant is passed through the first cooler for usual operation, or alternatively through the quick freezing circuit for quick freezing. During quick freezing, the first cooler is held out of operation, and the refrigerant has its pressure reduced in two steps by the first and second capillary tubes and is evaporated in the second cooler only, giving a low temperature effective for quick freezing. During usual operation, no refrigerant flows into the second cooler, which therefore remains free of frosting. The frost deposited on the second cooler during quick freezing disappears during the usual operation. Thus, the second cooler is substantially free from frost.

REFERENCES:
patent: 2128020 (1938-08-01), Smilack
patent: 3125866 (1964-03-01), Mann et al.
patent: 4470203 (1984-09-01), Bradley et al.
patent: 4499738 (1985-02-01), Motoyama et al.
patent: 4513581 (1985-04-01), Mizobachi et al.
patent: 4537041 (1985-08-01), Denpou et al.
patent: 4697429 (1987-10-01), Chandler et al.

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