(57) In a heat pump type air conditioner capable of maintaining a room temperature constantly
by including two outdoor heat exchangers (16,18) and performing a heating operation
with one heat exchanger when the other heat exchanger performs a defrosting operation,
the heat pump type air conditioner includes a compressor (12) for compressing a coolant;
a four-way valve (14) for switching a flow of the coolant normally or reversely; a
first and a second outdoor heat exchangers (16,18) respectively installed outdoors,
used as a condenser in cooling and used as an evaporator in heating; plural indoor
heat exchangers respectively installed at each indoor space and performing a cooling/heating
operation; a first and a second outdoor expansion valves (20,22) respectively installed
at coolant pipes for connecting the first and second outdoor heat exchangers (16,18)
with the indoor heat exchangers (8a,8b) in order to turn the coolant into a low temperature-low
pressure state and open/close the coolant pipes; and a control unit (6) for making
one of the first and second outdoor heat exchangers (16,18) perform a defrosting operation
and making the rest perform a heating operation by controlling the first and second
outdoor expansion valves (20,22).
|
|
