Motor vehicle air conditioner control and warning system

Communications: electrical – Selective – Having indication or alarm

Patent

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Details

62323, 123 4115, 307 10R, 340 57, F01P 514

Patent

active

040718395

ABSTRACT:
A system for concomitantly shutting off a motor vehicle air conditioner compressor and lighting a warning light, when the engine of the vehicle overheats, and for concomitantly allowing operation of the air conditioning unit and shutting off the warning light when the engine is at normal operating temperature. The system features a two-position electrical switch such as a solenoid or relay which is electrically connected to a heat sensitive switch immersed in the liquid cooling medium of the engine. The heat sensitive switch has two states, depending on the temperature of the liquid cooling medium. In one state, i.e. when the liquid cooling medium temperature is normal, the two-position electrical switch is in a first position, and the electrically controlled clutch of the air conditioner compressor is closed and the warning light is not lit. In the other state, the two-position electrical switch is in a second position and the clutch is open, and the warning light is lit.

REFERENCES:
patent: 2810269 (1957-10-01), Schjolin
patent: 3597661 (1971-08-01), Isaacs
patent: 3702064 (1972-11-01), Ciollo
patent: 3904885 (1975-09-01), Hollins

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