| 摘要 |
PROBLEM TO BE SOLVED: To provide a refrigerating device suppressing a manufacturing cost and preventing control from becoming complicated.SOLUTION: A refrigerating device 10 has a multi-stage compressing mechanism 20 constituting by connecting a plurality of compressing parts in series, a heat source side main heat exchanging part 44 cooling refrigerant discharged from the compression part of the backmost side during cooling operation and becoming an evaporator during warming operation, a heat source side sub heat exchanging part 41 cooling refrigerant discharge from a front stage compressing section and sucked by the next rear stage compressing section during cooling operation and becoming an evaporator during heating operation, a using side heat exchanging section 12a functioning as an evaporator during cooling operation and functioning as a radiator during warming operation, a first expanding mechanisms 70, 52 decompressing refrigerant sent from the heat source side main heat exchanging part to the using side heat exchanging part during coding operation and sent in an opposite direction during warming operation, a first check valve 51b stopping the flow of refrigerant from the heat source side sub heat exchanging part to the using side heat exchanging part during cooling operation and allowing the opposite flow during warming operation, and a first capillary tube 51a decompressing refrigerant sent from the using side heat exchanging part to the heat source side sub heat exchanging the part during warming operation. |
