Protecting device for car air conditioner

Details Protecting device for car air conditioner Protecting device for car air conditioner

1998-03-30

1999-08-03

Tanner, Harry B.

Refrigeration

With indicator or tester

Operatively correlated with automatic control

62133, 192103R, 192 5641, B60H 132

Patent

active

059310081

ABSTRACT:
A protecting device for a car air conditioner includes a timer for timing a period of the rise in the level of a rotation signal delivered from a rotation sensor for detecting a rotational speed of a compressor with the signal being distinguished from noise. On the basis of the obtained period, a judgment is made as to whether rotation of the compressor is in an abnormal state. An electromagnetic clutch between the compressor and a car engine is controlled on the basis of the judgment. The protecting device is mounted on a housing of the compressor with the rotation sensor so that wiring is executed only in an engine room. The protecting device includes a state holding device for memorizing the abnormal state of the rotation of the compressor. The air conditioner can restart on condition that a conscious operation is performed to reset the state holding device.

REFERENCES:
patent: 4393966 (1983-07-01), Kono et al.
patent: 4462491 (1984-07-01), Kono et al.
patent: 4703627 (1987-11-01), Nakajima
patent: 5507152 (1996-04-01), Iwata et al.
patent: 5694781 (1997-12-01), Peterson

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