Refrigeration – Automatic control – Preventing – removing or handling atmospheric condensate
Patent
1981-06-30
1983-11-29
King, Lloyd L.
Refrigeration
Automatic control
Preventing, removing or handling atmospheric condensate
62156, 62234, F25D 2106
Patent
active
044174527
ABSTRACT:
An outdoor coil defrost control system for a reverse cycle refrigeration system comprising outdoor air temperature sensing means, means for producing an output signal indicative of the operation of the refrigeration compression means, and a special controller means having operative connections to the temperature sensing means and compression sensing means and comprising in part (a) a special variable frequency oscillator having an input indicative of the outdoor air temperature and an output signal the frequency of which varies as a non-linear function of the magnitude of the outdoor air temperature, (b) a counter means having an input connected to receive the output signal of the variable frequency oscillator, and (c) means for placing said refrigeration system into an outdoor coil defrost mode of operation upon the counter means counting a preselected number of counts or pulses.
REFERENCES:
patent: 4209994 (1980-07-01), Mueller et al.
Ruminsky Robert T.
Serber Stephen L.
Honeywell Inc.
Jensen Roger W.
King Lloyd L.
Tanner Harry B.
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