Patent ID: 8985963
Filing Date: 2015-03-24
Classification: F01C,F04C

Abstract:
1. A vane compressor comprising: a cylinder block; a cylinder chamber that is formed in an inside of the cylinder block and that has an ellipsoidal inner wall; a rotor that is rotatably supported in the cylinder chamber and having an outer circumferential surface provided with a plurality of vane slots formed thereon; a drive source for rotating the rotor; and a plurality of vanes housed in the plurality of vane slots, respectively, wherein the rotor is rotated by the drive source while the vanes are protruded from the vane slots by backpressure generated in backpressure spaces in the vane slots to contact end edges of the vanes with the inner wall of the cylinder chamber, the compressor further comprises a stop mechanism that stops the rotor at a predetermined rotational position where a difference between a total volume of the backpressure spaces when operated and a total volume of the backpressure spaces when stopped becomes a minimum; wherein the drive source is an electrical motor provided with a sensor configured to detect a rotational angle thereof, the electrical motor is configured to rotationally drive the rotor, the electrical motor detecting a rotational position of the rotor based on the rotational angle, and the stop mechanism is a drive circuit for controlling the electrical motor so as to stop the rotor at the predetermined rotational position.