| 摘要 |
PROBLEM TO BE SOLVED: To reduce pump power by separating a control of a center-side secondary pump and a local control.SOLUTION: A heating medium piping system includes a primary pump which circulates hot and cold water on the side of a heat source machine, and a secondary pump which circulates the hot and cold water to an air conditioner side, and is equipped with an air conditioner piping system for independently conditioning air in a plurality of areas, and a heat medium main conveyance loop. A distribution pump and a two-way valve are provided in each load side temperature control piping system. The rotation speed of the distribution pump and the opening degree of the valve are controlled, by using a signal obtained by calculating measured signal of a load-side control target temperature as two ratio biases. In controlling temperatures of the air conditioner, the rotation speed of an inverter of the air conditioner pump is adjusted in preference to the opening degree of the two-way valve. |
