Air conditioning compressor protection device

Details Air conditioning compressor protection device Air conditioning compressor protection device

1991-03-18

1992-06-09

Wayner, William E.

Refrigeration

With indicator or tester

Operatively correlated with automatic control

622281, 123 4115, 374144, F25B 4900, G01K 108

Patent

active

051196387

ABSTRACT:
A method of locating a limit switch (10) on a compressor (12) utilizes thermography for determining the optimum location thereof. A thermograph is produced for normal and abnormal operating modes of the compressor (12). High temperature gradients in the thermograph indicate high rates of temperature increases during compressor failure modes for selecting an optimum location for the limit switch. A bimetal switch (10) is utilized to establish a cut-out temperature for preventing operation of the compressor (12) and a cut-in temperature lower than the cut-out temperature for automatically closing to resume operation of the compressor (12) when returned to normal temperatures.

REFERENCES:
patent: 2978879 (1961-04-01), Heidorn
patent: 3232519 (1966-02-01), Long
patent: 3702065 (1972-11-01), Jacobs
patent: 4059366 (1977-11-01), Gannaway
patent: 4236621 (1980-12-01), Mukai et al.
patent: 4596518 (1986-06-01), Sumikawa
patent: 4704072 (1987-11-01), Nakajima et al.
patent: 4733175 (1988-03-01), Levinson
patent: 4799578 (1989-01-01), Matsushita

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