Controlling refrigeration

Details Controlling refrigeration Controlling refrigeration

1997-02-10

1999-02-09

Tanner, Harry B.

Refrigeration

Automatic control

Refrigeration producer

62211, 62223, F25B 4100

Patent

active

058679987

ABSTRACT:
A controller operates an electronic expansion valve (EEV) to control flow of refrigerant in an evaporator coil of a refrigeration system. The controller measures a superheat of the coil over a natural fill and boil cycle of the coil to determine an average rate at which the flow of refrigerant into the coil produces a desired temperature difference across the coil. The controller then operates the valve in a manner to control the flow of refrigerant based on the average rate.

REFERENCES:
patent: 4523435 (1985-06-01), Lord
patent: 4685309 (1987-08-01), Behr
patent: 4845956 (1989-07-01), Berntsen et al.

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