| 摘要 |
PROBLEM TO BE SOLVED: To realize the saving of resources and reduction in running cost for a piping material by reducing the length of piping and omitting a control valve to reduce the required power for a pump. SOLUTION: Temperature control systems 11 for independently air-conditioning a plurality of zones are connected in parallel to a heat source device 13 through a main pipe 15. Each system comprises a heat exchanger 7, a power-controllable pump 5 variably controlling the heat medium supply quantity to the heat exchanger 7 according to the temperature state of each zone, a backflow preventive means 3 connected to the upstream side or downstream side of the pump and preventing the backflow of heat medium to keep the direction of the flow, and a branch pipe 9 connecting the heat exchanger 7, the pump 5 and the means 3. The backflow preventive means 3 is a check valve which opens, when the power-controllable pump 5 is operated, to permit the flow of the heat medium, and closes, when the pump 5 stops to operate, to prevent the backflow of the heat medium. COPYRIGHT: (C)2005,JPO&NCIPI |
