Refrigerant compressor with rotation detecting means

Details Refrigerant compressor with rotation detecting means Refrigerant compressor with rotation detecting means

1996-05-22

1998-05-12

Izaguirre, Ismael

Pumps

With signal, indicator, or inspection means

417223, F04B 4902

Patent

active

057497109

ABSTRACT:
A refrigerant compressor having a drive shaft for driving a compressing mechanism and driven by a drive power transmitted from an external drive power source, and a rotation detecting unit for detecting the rotating speed of the compressor by detecting a change in the magnetic flux leaking from the solenoid clutch and circulating through a predetermined magnetic circuit. The change in the magnetic flux is caused by rotation of a magnetic plate-like element having at least one cutout which moves past the magnetic detecting unit, and a permanent magnet fixedly held by the housing assembly of the compressor is arranged so as to increase the density of the magnetic flux circulating through the predetermined magnetic circuit whereby the change in the magnetic flux caused by the rotation of the magnetic plate-like element becomes rapid.

REFERENCES:
patent: 4704072 (1987-11-01), Nakajima et al.
patent: 4781538 (1988-11-01), Daikohara
patent: 5407328 (1995-04-01), Kimura et al.
patent: 5540560 (1996-07-01), Kimura et al.
patent: 5624240 (1997-04-01), Kawaguchi et al.

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