Patent ID: 6986645

Claim:
A hybrid compressor system comprising: a fixed displacement compression unit for compressing a refrigerant cycle system, a motor powered by a power source to operatively rotate, for driving said compression unit, a disconnection means for intermittently disconnecting a drive force of a vehicle engine transmitted to said compression unit, and a control means for providing control to operate said motor and to allow said disconnection means to perform disconnection, wherein when a thermal load on said refrigeration cycle system lies within a predetermined range in a higher load region said control means connects said disconnection means to allow said vehicle engine to drive said compression unit, and when a thermal load on said refrigeration cycle system lies within a lower load region than said predetermined range, said control means disconnects said disconnection means to allow said motor to drive said compression unit even while said vehicle engine is running; and the compressor system further includes: an external drive means driven by said vehicle engine, provided on a side of said disconnection means closer to said vehicle engine, and a speed increasing means for increasing a rotational speed of the compressor by increasing the rotational speed of a drive force transmitted from said vehicle engine, provided between said external drive means and said compression unit but not between said motor and said compression unit, wherein said compression unit is increased in speed by said speed increasing means when the compression unit is driven by said vehicle engine, said compression unit is in sync with the rotation speed of said motor when the compression unit is driven by said motor, and wherein the motor drives the compressor at a higher speed in the higher load region than the speed driven by the motor in the lower region.