| 摘要 |
PROBLEM TO BE SOLVED: To provide a heat pump type air conditioner which saves on the energy in dehumidifying operation and suitably performs a comfortable dehumidifying operation at a low outside air temperature. SOLUTION: This air conditioner comprises a compressor 1, a four-way valve 2, an indoor heat-exchanger 3, a first expansion valve 9, and an outdoor heat-exchanger 10, each of which is connected through a coolant pipe or the like to form a coolant circuit, and the indoor heat-exchange 3 is dividable to a condenser and an evaporator by a dehumidifying valve 4. This air conditioner further comprises a liquid-vapor separator 7 set in the middle of the coolant piping route between the first expansion valve 9 and the indoor heat- exchanger 3 to insert-connect the pipe connected to the first expansion valve 9 and the pipe connected to the indoor heat-exchanger 3 from above, and connected to the suction pipe of the compressor through a second expansion valve 14. In such a structure, when dehumidification is performed by the coolant flow in heating operation, the pressure loss of the outdoor heat-exchanger is reduced, the reduction in coolant circulating quantity is prevented to improve the dehumidification efficiency. COPYRIGHT: (C)2004,JPO
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