Method and apparatus for controlling capacity of multiple compre

Details Method and apparatus for controlling capacity of multiple compre Method and apparatus for controlling capacity of multiple compre

1987-06-15

1989-05-23

Wayner, William E.

Refrigeration

Processes

Compressing, condensing and evaporating

62115, F25B 700

Patent

active

048318329

ABSTRACT:
In one exemplar embodiment, method and apparatus for controlling capacity of a multiple-stage cooling system is disclosed which utilizes means for establishing a single predetermined cooling stage "cut-in" pressure and a single predetermined cooling stage "cut-out" pressure, means for determining that the "cut-in" or "cut-out" pressures have been reached in the system, a delay means for introducing a selected minimum time delay after determining that the refrigerant fluid pressure has either reached the established "cut-in" or "cut-out" pressures, and control means for controlling the turning on or off of the next cooling stage after the time delay has elapsed.

REFERENCES:
patent: 2286538 (1942-06-01), Guler
patent: 3294023 (1966-12-01), Martin-Vegue, Jr. et al.
patent: 3513662 (1970-05-01), Golber
patent: 3717300 (1973-02-01), Evalds
patent: 4184341 (1980-01-01), Friedman
patent: 4612776 (1986-09-01), Alsenz

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