REFRIGERANT CIRCULATION TYPE AIR CONDITIONING SYSTEM

PROBLEM TO BE SOLVED: To enable supplying of a condensed refrigerant liquid by smoothly accumulating it during the cooling operation without providing a head between a heat exchanger and a tank. SOLUTION: In this refrigerant circulation type air conditioning system, an outdoor unit 1 and a room unit 2 are installed in a building so as to position the outdoor unit 1 above the room unit 2 while the both are interlinked by a refrigerant piping to circulate a refrigerant by a difference in specific gravity between a refrigerant liquid mainly liquefied by the outdoor unit 1 and a refrigerant gas vaporized by the room unit 2 in the cooling operation. In this system, a tank 8 is connected to a refrigerant liquid piping 3 and a refrigerant gas piping 4 of the outdoor unit 1 so as to be in parallel with a heat exchanger 7 of the outdoor unit 1 and an auxiliary pump 9 is disposed on the refrigerant piping 3 of the outdoor unit 1 on the downstream side from the convergent point with the tank 8 to send the refrigerant liquid to the side of the room unit 2. As a result, since the heat exchanger 7 and the tank 8 communicates with each other in the theory of a communication pipe, the refrigerant liquid condensed by the heat exchanger 7 can be smoothly accumulated thereby enabling smoothly sending of the refrigerant liquid with the auxiliary pump 9.