AIR-CONDITIONING DEVICE

摘要

Provided is an air-conditioning device that can perform defrosting efficiently without stopping heating performed by an indoor unit. This air-conditioning device is equipped with: a primary circuit 50, which circulates a refrigerant, and in which a compressor 1, indoor heat exchangers 3b and 3c, first flow volume control devices 4b and 4c, and multiple parallel heat exchangers 5-1 and 5-2 connected in parallel to each other are sequentially connected by pipes; first defrosting pipes 39-1 and 39-2, which divert a portion of the refrigerant discharged by the compressor 1 and cause that refrigerant to flow into the parallel heat exchanger 5-1 or 5-2 to be defrosted among the multiple parallel heat exchangers 5-1 and 5-2; a boundary heat exchanger 11 provided at the boundary of the multiple parallel heat exchangers 5-1 and 5-2; a first bypass pipe 37 that diverts a portion of the refrigerant discharged by the compressor 1 and causes that refrigerant to flow into the boundary heat exchanger 11; and a second bypass pipe 38 that causes the refrigerant flowing from the boundary heat exchanger 11 to flow into the primary circuit 50.