Method and apparatus for cooling produce

Details Method and apparatus for cooling produce Method and apparatus for cooling produce

1991-11-27

1994-01-11

Wayner, William E.

Refrigeration

Processes

Vacuumizing an open outlet chamber

62170, F25B 1900

Patent

active

052770311

ABSTRACT:
A vacuum cooling system is provided with controls for reliably and consistently controlling the cooling system for a chamber that holds produce provided with a vacuum pump, a refrigeration system, a vent valve, a bleed valve, first, second and third pressure detectors or pressure set points and a programmable logic controller for starting the pump and then automatically operating the refrigeration system in response to operation of the first pressure detector and then momentarily and repeatedly opening the bleed valve in response to operation of the second detector and wherein the third detector detects a pressure above the second level detector and the control system closes the bleed valve in response to operation of the third pressure detector.

REFERENCES:
patent: 4204408 (1980-05-01), Dawson
patent: 4576014 (1986-03-01), Miller
patent: 4615178 (1986-10-01), Badenhop

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