Method and apparatus for monitoring and controlling the operatio

Details Method and apparatus for monitoring and controlling the operatio Method and apparatus for monitoring and controlling the operatio

1993-04-15

1994-04-19

Tanner, Harry B.

Refrigeration

With indicator or tester

Operatively correlated with automatic control

62230, 361 22, F25B 4902

Patent

active

053035607

ABSTRACT:
Methods and apparatus for monitoring and controlling the operation of a refrigeration unit in a manner which eliminates the need for circuit breakers and fuses in control circuits which are instrumental in selecting and changing the operational mode of the refrigeration unit. When a need to change to a different operating mode is detected, a controller energizes a control device associated with the different operating mode and quickly determines if the current draw is within an acceptable range. If the current draw is within an acceptable range or window, the controller initiates the requested different operating mode. If the current draw is not within the acceptable range, the controller generates an appropriate alarm and different courses of action are decided upon which depend upon whether the current draw is above or below the limits of the acceptable range, the nature of the requested operating mode, and the desired temperature of a space conditioned by the refrigeration unit.

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