Patent ID: 8656729
Filing Date: 2014-02-25
Classification: F24F,F25B

Abstract:
1. An air conditioning system comprising: a refrigerant circuit in which a compressor, an indoor radiant heat exchanger, a first pressure reduction mechanism, a room air heat exchanger, a second pressure reduction mechanism and an outdoor heat exchanger are connected in this order and which operates in a vapor compression refrigeration cycle by reversibly circulating refrigerant therethrough; and an indoor fan for supplying room air to only the room air heat exchanger of the indoor radiant heat exchanger and the room air heat exchanger, wherein the air conditioning system is configured to perform a heating operation in which the second pressure reduction mechanism is controlled to reduce a refrigerant pressure so that in a heating cycle of the refrigerant circuit the refrigerant releases heat in the indoor radiant heat exchanger and the room air heat exchanger and takes heat in the outdoor heat exchanger to evaporate, and a defrosting operation in which the first pressure reduction mechanism is controlled to reduce the refrigerant pressure so that in a cooling cycle of the refrigerant circuit the refrigerant releases heat in the outdoor heat exchanger and the room air heat exchanger and takes heat stored during the heating operation in the indoor radiant heat exchanger to evaporate, and the outdoor heat exchanger frosted in the heating operation is defrosted.