空气源热泵的冲霜问题分析

Melt frost problem of air source heat pump analysis

本文分析了空气源热泵结霜的机理,从空气源热泵室外换热器的构造、在不同气候下的运行及与湿空气的相互作用中的结霜现象出发,对结霜过程等进行分析。指出结霜问题多数出现在环境温度-5～5℃、相对湿度70%以上。在环境温度高于5～7℃时仅有管上轻微结霜,或仅有结露,而结霜现象对空气源热泵的热效率是有利的。在北方寒冷地区-10℃以下的天气由于空气中的含湿量很小,即使结霜也不足以构成机组的运行障碍。

The paper analyzes the mechanism ,according to the structure of the outside exchanger of the air source heat pump.The paper also analyzes the frost phenomenon .Then the paper points out ＂frost problem＂ appears only at outside temperature -5 ℃ -5 ℃. relative humidity over 70%. When outside temperature at ＋7-8℃, only slight condensation on the tubes outside surface of the exchange.but when the outside temperature is below the -10℃, there is no frost phenomenon .Because of there is no wet in outside air.