| 摘要 |
PROBLEM TO BE SOLVED: To make it possible to easily replace an existing air conditioner switching over between a cooling operation and a heating operation by an air conditioner (1) capable of performing an operation in which a cooling operation and a heating operation are mixed easily at low cost.SOLUTION: An operation switching unit (5) for switching a refrigerant flow direction of each indoor unit (3) to correspond to switching to a cooling operation or a heating operation is connected to each indoor unit (3) by indoor unit communication piping elements (13, 14), a gas-liquid separation unit (4) is connected to an outdoor unit (2) by outdoor unit communication piping elements (11, 12), and the gas-liquid separation unit (4) is connected to each operation switching unit (5) by two existing intermediate unit communication piping elements (15, 16) and a new intermediate unit communication piping element (17). |
