US 12,140,330 B2
Control method and apparatus for water pumps in air conditioning system, and air conditioning system
Yuanyang Li, Shanghai (CN); and Yide Qiu, Shanghai (CN)
Assigned to SHANGHAI MEICON INTELLIGENT CONSTRUCTION CO., LTD., Shanghai (CN); and GD MIDEA HEATING & VENTILATING EQUIPMENT CO., LTD., Foshan (CN)
Filed by Shanghai Meicon Intelligent Construction Co., Ltd., Shanghai (CN); and GD Midea Heating & Ventilating Equipment Co., Ltd., Foshan (CN)
Filed on Sep. 29, 2021, as Appl. No. 17/489,486.
Application 17/489,486 is a continuation of application No. PCT/CN2020/078842, filed on Mar. 11, 2020.
Claims priority of application No. 201910630396.0 (CN), filed on Jul. 12, 2019.
Prior Publication US 2022/0018564 A1, Jan. 20, 2022
Int. Cl. F24F 11/46 (2018.01); G05B 17/02 (2006.01)
CPC F24F 11/46 (2018.01) [G05B 17/02 (2013.01)] 9 Claims
OG exemplary drawing
 
1. A control method for a water pump in an air conditioning system, wherein the air conditioning system comprises a plurality of water pumps in parallel, and the control method comprises:
acquiring a number of the plurality of water pumps currently running in the air conditioning system, and a current rotation speed ratio and a current running lift of the water pumps;
calculating a control range of a rotation speed ratio according to the number and the current running lift;
determining whether the current rotation speed ratio is in the control range of the rotation speed ratio,
switching the number of the plurality of water pumps to enable the rotation speed ratio of the water pumps to fall within the control range of the rotation speed ratio if the current rotation speed ratio is not in the control range of the rotation speed ratio; and
controlling the water pumps currently running to continue synchronous frequency conversion and speed regulation if the current rotation speed ratio is in the control range of the rotation speed ratio.