The present invention provides a rotation-type compressor exhauster which comprises a compressor main bearing, a position limiter, a compressor air cylinder, cylinder gas exhausting holes, a local convexsurface shaped air evacuation valve slice and taper shaped gas exhausting holes, wherein said compressor main bearing is fixed at the compressor air cylinder equipped with cylinder gas exhausting holes, the local convexsurface shaped air evacuation valve slice mentioned above is fixed at the compressor main bearing equipped with the taper shaped gas exhausting holes, the local convexsurface shape part of the local convexsurface shaped air evacuation valve slice aims at the taper shaped gas exhausting holes, the position limiter mentioned above is mounted above the local convexsurface shaped air evacuation valve slice and fixed at the compressor main bearing. The present invention possesses the beneficial effects as follows: by designing the cylindrical gas exhausting holes into taper shaped gas exhausting holes, the venting area is expanded in equal case, and the clearance volume caused by presence of gas exhausting holes is relatively reduced, the volume efficiency of the compressor is improved and the noises are reduced. |