Method for controlling an electronic expansion valve in refriger

Details Method for controlling an electronic expansion valve in refriger Method for controlling an electronic expansion valve in refriger

1990-04-23

1991-03-19

Wayner, William E.

Refrigeration

Processes

Compressing, condensing and evaporating

62212, 62225, F25B 4100

Patent

active

050000098

ABSTRACT:
In a refrigeration system including an incremental expansion valve and an electronic controller for controlling the operation of the expansion valve, a method of controlling the expansion valve in response to a sensed condition of the refrigerant in the system. According to the method, the valve controller alters the control gain rate to provide compensation in the valve flow rate for changing refrigerant conditions in the system due to the staging of multiple condenser fans and flooding of the evaporator.

REFERENCES:
patent: 4790145 (1988-12-01), Thompson et al.
patent: 4807445 (1989-02-01), Matsuoka et al.
patent: 4835980 (1989-06-01), Oyanagi et al.
patent: 4934155 (1990-06-01), Lowes

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