STRUCTURE FOR COOLING CENTRIFUGAL COMPRESSOR

摘要

PURPOSE: A structure for cooling a centrifugal compressor is provided to restrain liquid refrigerant from flowing into the centrifugal compressor, thereby preventing an unstable operation or an explosion of the centrifugal compressor. CONSTITUTION: An accumulator(70) is communicated with a refrigerant pipe connecting an evaporator and a centrifugal compressor(60), so that the accumulator(70) divides refrigerant passed the evaporator into liquefied refrigerant and gaseous refrigerant, and makes only the gaseous refrigerant flow into compressing chambers(C1,C2) of the centrifugal compressor(60). A liquefied refrigerant guide connecting pipe(80) guides the liquefied refrigerant gathered in the accumulator(70) to flow into a high-temperature part of the centrifugal compressor(60) by difference in pressure.