| 摘要 |
PROBLEM TO BE SOLVED: To provide an air conditioning device capable of performing a defrosting operation which can deal with partial frosting during a heating operation, in a refrigerant circuit for performing a cooling operation and a heating operation by performing a plurality of stages of compression.SOLUTION: In an air conditioning device 1 which switches and performs a cooling operation and a heating operation and an intercooler defrosting operation and/or a gas cooler defrosting operation, and which performs a multistage compression refrigeration cycle, by switching of first to fourth four-way switch valves 26-29, in the intercooler defrosting operation, out of outdoor heat exchangers, portions other than the portion to which a refrigerant from the highest-stage compression part is fed during the cooling operation are defrosted, and in the gas cooler defrosting operation, out of the outdoor heat exchangers, the portion to which the refrigerant from the highest-stage compression part is fed during the cooling operation is defrosted. |
