Cooling system for a two-temperature refrigerator

Details Cooling system for a two-temperature refrigerator Cooling system for a two-temperature refrigerator

1974-10-10

1976-04-20

O'Dea, William F.

Refrigeration

Automatic control

Withdrawing or adding refrigerant from or to normally closed...

62174, 62198, 62209, 62526, F25B 4500

Patent

active

039509613

ABSTRACT:
A refrigerator has a low-temperature cooling compartment and a higher-temperature cooling compartment, and is provided with a cooling system comprised of a cooling-medium flow circuit. The flow circuit includes a compressor, a condenser downstream of the compressor, a flow restrictor downstream of the condenser, a first evaporator section downstream of the flow restrictor and operative for cooling the lower-temperature compartment, and a second evaporator section downstream of the first evaporator section and operative for cooling the higher-temperature compartment. An accumulator communicates with the flow circuit upstream of the flow restrictor. A heater is provided for heating liquid cooling medium in the accumulator to cause evaporation of part of such liquid cooling medium and concomitant pushing of the liquid remainder of the liquid cooling medium in the accumulator out of the accumulator and into the second evaporator section. A first regulator device controls the operation of the compressor and the energization of the heater in dependence upon the temperature of the higher-temperature compartment. A second regulator is operative independently of the operation of the first regulator for initiating operation of the compressor when the temperature of the lower-compartment exceeds a preselected maximum value.

REFERENCES:
patent: 2581044 (1952-01-01), Ratcliff
patent: 2828614 (1958-04-01), Smith
patent: 3065610 (1962-11-01), Maudlin
patent: 3238737 (1966-03-01), Shrader et al.

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