Refrigerant circuit for ice making machines etc.

Details Refrigerant circuit for ice making machines etc. Refrigerant circuit for ice making machines etc.

1995-02-10

1996-09-17

Tapolcai, William E.

Refrigeration

Means producing shaped or modified congealed product

Thawing means

621964, 62278, F25C 510

Patent

active

055557449

ABSTRACT:
Disclosed is a refrigerant circuit for an ice making machine and the like, in which not only drop in the performance or damage of a compressor due to the abnormally elevated higher level pressure thereof but also double-freezing can effectively be prevented. The refrigerant circuit comprises a freezing circuit in which a vaporized refrigerant compressed in a compressor to high temperature and pressure levels is fed via a solenoid valve to a condenser, the refrigerant condensed in the condenser is then fed to an expansion means, the refrigerant vaporized through the expansion means is further fed to an evaporator, and the vaporized refrigerant heated through heat exchange with the evaporator is fed back to the compressor; and a hot gas circuit which bypasses the high-pressure and high-temperature vaporized refrigerant fed from the compressor to the evaporator via a hot gas valve so as to achieve ice releasing and the like at the evaporator; the solenoid valve and the hot gas valve being designed to be let open and closed, respectively, during the freezing operation and to be closed and let open, respectively, when the operation mode is switched to the ice releasing operation; wherein the solenoid valve is designed to be let open before completion of the ice releasing operation.

REFERENCES:
patent: 4565070 (1986-01-01), Raymond
patent: 4791792 (1988-12-01), Naruse et al.
patent: 5203176 (1993-04-01), De Weered

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