Air conditioning apparatus comprising refrigerant shortage senso

Details Air conditioning apparatus comprising refrigerant shortage senso Air conditioning apparatus comprising refrigerant shortage senso

1979-07-23

1981-08-25

Wayner, William E.

Refrigeration

Automatic control

Responsive to vehicle body motion or traction

62158, 62228, 623234, 62228R, B60H 304, G05D 2332

Patent

active

042852072

ABSTRACT:
A float operated switch (21) is actuated when the level of refrigerant fluid in a reservoir (11) is below a predetermined value to produce an electrical signal. The signal is delayed by 10 to 30 seconds and applied to a switch circuit (54) to disengage an electromagnetic clutch (63) and thereby de-energize a compressor (64). The clutch (63) is also disengaged by the action of a thermal switch (61) when the temperature in a space which is being air conditioned drops below a predetermined value. The operation of the float operated switch (21) is inhibited when the sensed temperature is below the predetermined value and also when a motor which drives the compressor (64) is not operating to prevent erroneous de-energization of the compressor (64).

REFERENCES:
patent: 3107818 (1963-10-01), Carmellini et al.
patent: 3702064 (1972-11-01), Ciolli
patent: 3744267 (1973-07-01), Norbeck
patent: 4167858 (1979-09-01), Kojima et al.

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