| 摘要 |
An increase in the thickness of refrigerant communication pipes is reduced in an air conditioning system capable of using a refrigeration cycle in which a refrigerant is compressed to critical pressure or greater, and switching between indoor heating and cooling. The air conditioning system (1) comprises a compressor (21), a first heat source-side heat exchanger (22) for heating or cooling a refrigerant, a second heat source-side heat exchanger (23) for exchanging heat between the refrigerant and a heat delivery medium, a first utilization-side heat exchanger (41) for performing indoor cooling by using the refrigerant cooled in the first heat source-side heat exchanger (22), a second utilization-side heat exchanger (51) for performing indoor heating by using the heat delivery medium subjected to heat exchange in the second heat source-side heat exchanger (23), and a connection mechanism (24). The connection mechanism (24) can switch between a first connection state in which the refrigerant is circulated sequentially through the compressor (21), the first heat source-side heat exchanger (22), the first utilization-side heat exchanger (41) and the compressor (21); and a second connection state in which the refrigerant is circulated sequentially through the compressor (21), the second heat source-side heat exchanger (23), the first heat source-side heat exchanger (22), and the compressor (21). |
