Air conditioning system

A system comprising:

• an indoor heat exchanger that is a fan-less heat exchanger and includes an indoor tube installed so as to be inclined to the horizontal, the indoor tube contacting a high-temperature air zone in an upper part of a room and refrigerant in the indoor tube being heated by the high-temperature air zone so as to boil and vaporize with air in the high-temperature air zone flowing down through the indoor heat exchanger:
• an outdoor heat exchanger that includes an outdoor tube installed outside at a higher position than the indoor tube, the outdoor tube being connected to the indoor tube via connecting pipes without a compressor being interposed therebetween and the outdoor tube condensing and liquefying the refrigerant boiled and vaporized in the indoor tube and returning the refrigerant to the indoor tube:
• and
• a floor-standing air conditioner installed on a floor of the room,
• wherein the indoor heat exchanger is disposed so as to directly contact the high-temperature air and a down flow produced by the indoor heat exchanger is drawn into an air intake of the floor-standing air conditioner.