空气源热泵双回路旁通除霜控制策略的试验研究  

Experimental investigation on control strategy of defrosting with two bypass loops for air source heat pump

作　　者：司春强 邵双全[2] 刘彦杰[2] Si Chunqiang;Shao Shuangquan;Liu Yanjie(Huashang International Engineering Co., Ltd.;CAS Key Laboratory of Cryogenics,Technical Institute of Physics and Chemistry)

机构地区：[1]华商国际工程有限公司 [2]中国科学院低温工程学重点实验室(理化技术研究所)

出　　处：《制冷与空调》2019年第4期56-60,65,共6页Refrigeration and Air-Conditioning

基　　金：国家重点研发计划(2017YFD0401302);国家自然科学基金资助项目(51676199)

摘　　要：为了改善空气源热泵除霜工况下的制热性能,对双回路旁通除霜技术及其控制策略进行试验研究。在室外空气温度1℃,-5℃,-10℃及100%相对湿度条件下,对采用双回路旁通除霜技术的一台2 hp家用分体式空调器进行测试,并与采用四通阀换向除霜方式下的除霜/制热性能进行对比。结果表明,整个结霜除霜周期能够保持良好的制热性能和除霜性能,在3种工况下的最低送风温度分别为37. 9℃,34. 8℃和34. 6℃,均不低于正常制热的送风温度,采用双回路旁通除霜技术可以在除霜过程中保持室内机连续供热运行。In order to improve the heating performance of air source heat pumps under defrosting condition,it is experimentally investigated on the defrosting technology with two bypass loops and its control strategy. A household split air conditioner of 2 hp using the defrosting technology with two bypass loops is tested under the outdoor air temperatures of 1 ℃,-5 ℃,-10 ℃ and relative humidity of 100%. And its defrosting/heating performances are compared between that of the air conditioner using defrosting with 4-way valve. The results show that heating performance and defrosting performance are improved during the whole frosting/defrosting cycle. The lowest supply air temperatures are 37.9 ℃,34.8 ℃ and 34.6 ℃ respectively under these three conditions,which are not lower than the supply air temperature of normal heating. It’s indicated that using the defrosting technology with two bypass loops can keep the indoor unit heating operating continuously during defrosting.

关 键 词：空气源热泵 空调器 除霜 控制策略 制热 

分 类 号：TU83[建筑科学—供热、供燃气、通风及空调工程]