Based on the analysis of the relationship between the high-efficiency section of frequency conversion regulation and the resistance characteristics of the distribution network of air conditioning system

this paper puts forward the equal resistance regulation based on the high-efficiency section of water pump. Furthermore

this paper divides the regulation into the equal resistance characteristic section and the constant pressure limit speed section according to the actual working situation of circulating water pump. Through a case

this paper also gives the control system composition of equal resistance regulation and the actual regulation steps of circulating water pump and control valve. Compared with the traditional pump control

resistance regulation is always in a small resistance range

while the circulating water pump also keeps working in an efficient range

which has a high energy conservation level.