Electronic control for monitoring status of a compressor

Details Electronic control for monitoring status of a compressor Electronic control for monitoring status of a compressor

1989-05-03

1991-02-05

Smith, Leonard E.

Pumps

Condition responsive control of pump drive motor

Having timer or delay means

417 13, 417 18, 417 32, 417 33, 417 44, 417 53, 417 63, 184 64, 184108, F04B 4902

Patent

active

049900579

ABSTRACT:
The compressor controller includes a timing circuit for timing-out a detected fault in a compressor. Upon the fault existing for longer than a predetermined time limit, the controller removes power from the compressor. If the fault is corrected within the predetermined time limit, even momentarily, the timing process is discontinued and the controller continues to monitor the status of the compressor. The controller also includes a delay timer for delaying the re-energizing of the compressor after an interruption or loss of power occurs. The delay prevents short cycling of the compressor. The controller further includes a status display for indicating compressor functions, connections to an alarm which is initiated in the event of compressor failure, a switch for initiating a self test of the controller, and circuitry for a field applied current sensing relay.

REFERENCES:
patent: 1173415 (1916-02-01), Windeler
patent: 3721866 (1973-03-01), McIntosh
patent: 4038061 (1977-07-01), Anderson et al.
patent: 4281358 (1981-07-01), Plouffe et al.
patent: 4336001 (1982-06-01), Andrew et al.
patent: 4502084 (1985-02-01), Hannett
patent: 4510547 (1985-04-01), Rudich, Jr.
patent: 4672231 (1987-06-01), Sutton et al.
patent: 4674335 (1987-06-01), Wendt
patent: 4712648 (1987-12-01), Mattes et al.

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