Perishable product protection control system

Details Perishable product protection control system Perishable product protection control system

1998-12-24

2000-05-09

Wayner, William

Refrigeration

Processes

Circulating external gas

62178, 236 78D, F25D 1700, G05D 1500

Patent

active

060587164

ABSTRACT:
A method of controlling supply air temperature in an enclosure refrigerated with a refrigeration cycle including an evaporator exhibiting a temperature differential, is disclosed. The method includes the steps of defining a supply temperature limit constant and a setpoint; sensing supply air temperature; sensing return air temperature; comparing supply air temperature to the supply temperature limit constant; increasing supply air temperature if supply air temperature drops below the constant and at least one of additional determinable factors is sensed, thereby reducing cooling capacity; and increasing cooling capacity without substantially effecting the temperature differential at the evaporator.

REFERENCES:
patent: 5172560 (1992-12-01), Jurewicz et al.
patent: 5295364 (1994-03-01), Truckenbrod et al.
patent: 5634347 (1997-06-01), Hanson et al.

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