Use of electronic expansion valve to maintain minimum oil flow

Details Use of electronic expansion valve to maintain minimum oil flow Use of electronic expansion valve to maintain minimum oil flow

1998-04-29

2000-04-18

Bennett, Henry

Refrigeration

Automatic control

Refrigeration producer

62204, 62211, 62223, 62224, F25B 4100

Patent

active

060500980

ABSTRACT:
A method of controlling an expansion valve including the steps of: measuring a primary system condition; determining an error in the primary system condition; measuring a secondary system condition; determining an error in the secondary system condition; and modulating the expansion valve based upon the larger of the first or second error.

REFERENCES:
patent: 4478051 (1984-10-01), Ibrahim
patent: 4686835 (1987-08-01), Alsenz
patent: 4706469 (1987-11-01), Oguni et al.
patent: 5222371 (1993-06-01), Doyama et al.
patent: 5749238 (1998-05-01), Schmidt
patent: 5845503 (1998-12-01), Choi

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