Freezer machine

Details Freezer machine Freezer machine

1990-03-01

1991-01-22

Tanner, Harry B.

Refrigeration

Automatic control

Time or program actuator

62 83, 621964, 62233, G05D 2332

Patent

active

049860836

ABSTRACT:
In a freezer machine having a refrigeration system in the form of a circulation circuit including a compressor, a condenser, an evaporator coil arranged for thermal exchange with a freezing receptacle, and a solenoid valve of the normally closed type disposed within a bypass circuit of the circulation circuit to supply therethrough the hot gas outflowing from the compressor directly into the evaporator coil when it has been energized, an electric control circuit for the freezer machine is designed to repeatedly measure a first predetermined period of time, for instance four hours, in a condition where said compressor is being deactivated, to measure a second predetermined period of time, for instance three minutes, upon each lapse of the first predetermined period of time and to activate the compressor for the second predetermined period of time upon each lapse of the first predetermined period of time and energize the solenoid valve in response to activation of the compressor.

REFERENCES:
patent: 3855812 (1974-12-01), Linstromberg
patent: 3885937 (1975-05-01), Norros
patent: 4644756 (1987-02-01), Sugimoto et al.
patent: 4697431 (1987-10-01), Alsenz

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