从提高空气温度和改变空气湿度两方面详细阐述了空气源热泵系统无霜化处理方法，简单介绍了各方法的原理及相对除霜式空气源热泵所具有的优势。最后对空气源热泵无霜化的研究方向进行展望：可以利用余热或太阳能提高流经室外换热器空气的温度以实现无霜化；进一步研究固体除湿剂在低温环境下的吸附能力和再生能力；重点探究除湿溶液的再生方法以及再生能量来源和再生后水蒸气利用；加大研发更加高效的除湿溶液和防冻溶液。

The frostfree method of air source heat pump system is elaborated from two aspects of raising air temperature and changing air humidity.The principles of each method are briefly introduced,followed by the advantages over the defrosting air source heat pump.Finally,the research direction of frostfree air source heat pump is prospected: using waste heat or solar energy to raise the air temperature passing through the outdoor heat exchanger to achieve frostfree; further investigation on the adsorption capacity and regeneration capacity of solid dehumidifier in low temperature environment; key exploration on the regeneration method of dehumidification solution,the source of regeneration energy and the utilization of steam after regeneration; further research and development on dehumidification solution and antifreeze solution.

TU83

国家自然科学基金（51606126）；上海市地方高校能力建设项目（18060502600）