Patent ID: 7685835

Claim:
An air conditioning system capable of heating a room, comprising: a heat source unit having a vapor compression refrigerant circuit including a compressor, a heat source side heat exchanger, an expansion mechanism, and a utilization side heat exchanger fluidly connected to each other to circulate a refrigerant within the vapor compression refrigerant circuit, the heat source unit being configured to heat a heating medium in the utilization side heat exchanger, the heating medium being a different material from the refrigerant; an air supply device that supplies an outside air into the room as a ventilation air; a water supply humidifier arranged and configured to humidify the ventilation air supplied by the air supply device; a heating medium circuit having at least one room heating device that releases the heat of the heating medium heated in the utilization side heat exchanger to room air within the room, the heating medium circuit being configured to circulate the heating medium between the room heating device and the utilization side heat exchanger; and a supply water heating device that uses the heat generated from the heat source unit in order to heat water to be used in the humidifier, the supply water heating device including a first supply water heating device and a second supply water heating device, the first and second supply water heating devices being connected to the heating medium circuit, the heating medium circuit being connected to the utilization side heat exchanger such that the heating medium is sequentially supplied to the first supply water heating device, the room heating device, and the second supply water heating device, and the water to be used in the humidifier being sequentially supplied to the second supply water heating device and the first supply water heating device.