Refrigeration system alarm device

Details Refrigeration system alarm device Refrigeration system alarm device

1983-07-18

1985-03-05

Wayner, William E.

Refrigeration

With indicator or tester

Operatively correlated with automatic control

62236, 361 29, 361 92, F25B 4900

Patent

active

045022879

ABSTRACT:
A refrigeration system alarm device includes a temperature monitoring circuit which detects when a temperature within the refrigeration system exceeds a preselectable temperature reference level. The device also includes an alternating current power monitor circuit which detects when any one of a plurality of alternating current power inputs is interrupted. The device also includes a direct current power monitor circuit which includes a battery and a comparator circuit for determining when the voltage of the battery is below a predetermined level. When an excessive temperature is detected or an alternating current power input interruption is detected or the battery voltage is below the predetermined reference level, a visual or audible alarm signal is generated. If an alternating current power input interruption is detected, a control signal generated in response thereto controls a compressor control circuit to prevent a compressor of the refrigeration system from operating during the alternating current power interruption and a predetermined time period thereafter.

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