CONTROL METHOD AND APPARATUS FOR WATER PUMPS IN AIR CONDITIONING SYSTEM, AND AIR CONDITIONING SYSTEM

摘要

A control method and apparatus for water pumps in an air conditioning system, and an air conditioning system. The control method comprises the following steps: obtaining the number of water pumps currently running in the air conditioning system, and the current speed ratios and the current running lift of the water pumps; calculating a control range of the speed ratios according to the number and the current running lift; determining whether the current speed ratios are in the control range of the speed ratios or not; and if the current speed ratios are not in the control range of the speed ratios, switching the number of running water pumps so as to enable the speed ratios of the water pumps to fall within the control range of the speed ratios. According to the control method, the number of water pumps can be switched according to the running number of water pumps and the lift of the water pumps, so that it is guaranteed that the water pumps run in the high-efficiency interval under the full-load working condition, and the purposes of variable-frequency energy-saving control of the water pumps and reduction of running power consumption of the air conditioning system are achieved.