TANDEM TYPE VANE COMPRESSOR

摘要

ABSTRACT OF THE DISCLOSURE A tandem type vane compressor of the present invention has primary and secondary vanes and primary and secondary vane grooves. A primary backpressure chamber is defined between the bottom surface of each primary vane and the corresponding primary vane groove. A secondary backpressure chamber is defined between the bottom surface of each secondary vane and the corresponding secondary vane groove. i The primary and secondary back pressure chambers are connected to a discharge chamber by first and second backpressure supplying mechanism in the compression process of first and second compression mechanisms, respectively. The first and the second backpressure supplying mechanisms ; include first and second rotation paths, which are formed in the drive shaft, and firs and second intermittent mechanisms, which selectively allow and interrupt communication of the first and second rotation paths with the discharge chamber and with each of the primary and secondary backpressure i chambers according to the phase in the rotation direction of the drive shaft, respectively.