Central air conditioning control by temperature change economizer system

The utility model provides a central air conditioning control by temperature change economizer system, a serial communication port, include: central air -conditioning system, cooling pump motor, freezing pump motor, temperature sensor and PID controller, the cooling pump is connected to cooling pump motor output end, and the PID controller is connected to the input, freezing pump is connected to the freezing pump motor output end, and the PID controller is connected to the input, PID controller signal input connect temperature sensor, temperature sensor sets up on heat exchanger respectively. In this way, the utility model discloses can guarantee that each motor with the output of economic output, carries out temperature control accurately, life -span of extension circulating water system to practice thrift the electric energy by a wide margin. 本实用新型提供了种中央空调温控节能系统，其特征在于，包括：中央空调系统、冷却泵电机、冷冻泵电机、温度传感器以及PID控制器；所述冷却泵电机输出端连接冷却泵，输入端连接PID控制器；所述冷冻泵电机输出端连接冷冻泵，输入端连接PID控制器；所述PID控制器信号输入端连接温度传感器，所述温度传感器分别设置在热交换器上。通过上述方式，本实用