Cooling of hybrid scroll compressor wrap by suction pressure gas passages

This application relates to an improvement in hybrid wrap scroll compressors wherein a suction pressure gas is passed through a thick portion of the wrap and between lower pressure and higher pressure compression chamber pockets. This gas cools the thickened portion of the wrap. A cooling passage is formed through the wrap of a non-orbiting scroll. The cooling passage communicates with suction pressure refrigerant and passes the suction pressure refrigerant through both the base and the wrap of the non-orbiting scroll to cool an interface between suction pressure chamber and discharge pressure chambers. Preferably the cooling passage extends for a relatively great circumferential extent, and preferably more than 45°. More preferably the passage extends for more than 90°. The cooling passage provides a heat barrier increasing the efficiency of compression. Moreover, by having the suction pressure flow to the interface between the thicker portion of the wrap and the opposed base of the orbiting scroll, several benefits are obtained with regard to reliable operation of the scroll compressor.