Refrigeration pull-down technique

Details Refrigeration pull-down technique Refrigeration pull-down technique

1993-07-14

1994-03-22

Wayner, William E.

Refrigeration

Automatic control

Refrigeration producer

62229, F25B 100

Patent

active

052953645

ABSTRACT:
Apparatus for and method of rapidly bringing a controlled space to a desired temperature. The technique is particularly applicable to the maintenance of controlled temperature spaces for the transportation of perishable cargo, such as in refrigeration trucks. Immediately following completion of the loading process, it is desirable to bring the internal temperature of the controlled space to the proper operating point as quickly as possible to retard spoilage. However, it is necessary to avoid unacceptable overshoot to prevent damage to the cargo by freezing. The disclosed system employs multiple sensors and a control algorithm to permit pull down to occur as rapidly as possible without unacceptable overshoot.

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patent: 4060123 (1977-11-01), Hoffman et al.
patent: 4509586 (1985-04-01), Watabe
patent: 4589060 (1986-05-01), Zinsmeyer
patent: 4663725 (1987-05-01), Truckenbrod et al.
patent: 4715190 (1987-12-01), Him et al.
patent: 4742689 (1988-05-01), Lowes
patent: 4918932 (1990-04-01), Gustafson et al.
patent: 4977752 (1990-12-01), Hanson

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