Patent ID: 7143593
Filing Date: 2006-12-05
Classification: F25B,Y02B

Abstract:
1. A refrigerant cycle apparatus comprising: a refrigerant circuit constituted by successively connecting a compressor, a gas cooler, throttling means, and an evaporator, wherein the throttling means includes a plurality of capillary tubes, refrigerant circulation into each capillary tube is controlled so that a flow path resistance of the throttling means is variable, and the flow path resistance of the throttling means at the time of the starting of the compressor is reduced; wherein carbon dioxide is used as the refrigerant, the compressor includes first and second compression elements driven by a driving element, the refrigerant is sucked into the first compression element from the low-pressure side of the refrigerant circuit and compressed, and the refrigerant discharged from the first compression element and having an intermediate pressure is sucked into the second compression element, compressed, and discharged to the gas cooler, wherein an intermediate cooling circuit is used to cool the refrigerant discharged from the first compression element before the refrigerant is sucked into the second compression element, and wherein an internal heat exchanger is used to exchange heat from the refrigerant on the high pressure side flowing from the gas cooler to the refrigerant on the low pressure side flowing from the evaporator.