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回顾了我国不同历史时期采暖和空调水系统补水定压的几种方式，并指出变频补水定压将是满足当今及今后一个时期大面积采暖和高层，超高层空调水系统补水定压的主要方式。
Recalling several ways of replenishing water and constant pressure in heating and air-conditioning water systems in different historical periods in China, and pointing out that the constant pressure of frequency-changing water supply will be the main way to meet the current needs of large-area heating in the present and future periods, and the water supply and constant pressure of high-rise and super high-rise air conditioning water systems. .