Refrigeration – Automatic control – Refrigeration producer
Patent
1984-05-14
1985-05-07
Tanner, Harry
Refrigeration
Automatic control
Refrigeration producer
62230, 361 22, F25D 1702, H02H 700
Patent
active
045149895
ABSTRACT:
A method and control system for protecting an electric motor driven compressor in a refrigeration system are disclosed. The refrigeration system operates to satisfy a load placed on the system and the refrigeration system compressor is turned off when the load is satisfied and the refrigeration system is providing excess capacity. When the compressor is turned off due to excess capacity, current flow to the electric motor driving the compressor is sensed and the refrigeration system is shut down if the sensed current flow is abnormal. In this manner, the compressor and the electric motor driving the compressor are protected against restarting under unfavorable operating conditions which could unduly wear the compressor motor and/or the compressor.
REFERENCES:
patent: 3377816 (1968-04-01), Berger
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patent: 3598214 (1971-08-01), Harris
patent: 3633073 (1972-01-01), Day
patent: 3721880 (1973-03-01), Neill
patent: 4034570 (1977-07-01), Anderson et al.
patent: 4045973 (1977-09-01), Anderson et al.
patent: 4142375 (1979-03-01), Abe et al.
Carrier Corporation
Miller Douglas L.
Tanner Harry
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