Cooling circuit has hermetically sealed electric compressor for sucking and compressing coolant, electric motor, cooler, pressure reduction unit and accumulator

摘要

A cooling circuit comprises a hermetically sealed electric compressor for sucking and compressing coolant, with an electric motor (120), a carbon dioxide coolant, and a cooler (200). A pressure reduction unit (300) decomposes coolant from the cooler and a vaporizer (400) vaporizes the coolant. An accumulator separates the coolant from the vaporizer into a liquid and a gas by separating lubricating oil for the compressor from the coolant. The main lubricating oil component is polyalkylene glycol.