Refrigeration – Processes – Compressing – condensing and evaporating
Patent
1988-09-15
1989-12-05
Wayner, William E.
Refrigeration
Processes
Compressing, condensing and evaporating
62129, 417 63, 73593, F04B 2304
Patent
active
048844128
ABSTRACT:
A slug detection and prevention apparatus 10 and method therefor, which includes a detector 1, high pass filter 2, low pass filter 3, half-wave rectifier 4, comparator 5, and relay 6. Detector 1, being an accelerometer, condenser microphone, or the like, is electrically connected to high pass filter 2. High pass filter 2 is electrically connected to a low pass filter 3 whose output is electrically connected to a half-wave rectifier 4. The output of half-wave rectifier 4 is electrically connected to a comparator 5 which is also electrically connected to a separate voltage source, the magnitude of which corresponds to the energy present in the pass band or a normally operating compressor. The output of comparator 5 is electrically connected to relay 6 which controls the operation of compressor 7. The vibration wave form of compressor 7 is monitored by detector 1 whose signal is filtered to produce an output between apparoximately 80 and 305 hertz. The signal in this pass band is compared to a reference level corresponding to the level of the normally operating compressor for the purpose of slug detection and subsequent compressor deactivations.
REFERENCES:
patent: 3269320 (1966-08-01), Tilley et al.
patent: 3766747 (1973-10-01), Parker
patent: 4265603 (1981-05-01), Chiyoda et al.
patent: 4336001 (1982-06-01), Andrew et al.
Garrison Terry
Sellers William
Dykas Frank J.
Korfanta Craig M.
Wayner William E.
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