融霜工况下压缩机运行频率对空气源热泵机组制热性能的影响  

Influence of compressor operating frequency on heating performance of air source heat pump unit under defrosting condition

作　　者：翁文兵[1] 李晓[1] 李霞[1] WENG Wenbing;LI Xiao;LI Xia(University of Shanghai for Science and Technology,Shanghai 200093,China)

机构地区：[1]上海理工大学,上海200093

出　　处：《流体机械》2021年第12期12-18,共7页Fluid Machinery

基　　金：上海市青年科技英才扬帆计划项目(20YF1432000)。

摘　　要：为研究融霜工况下压缩机运行频率对热泵机组制热性能的影响,通过试验对融霜工况下空气源热泵机组在不同频率下的特性进行了研究。结果表明,热泵机组以80 Hz以下频率制热运行时,机组在一个制热-融霜周期内的产热、融霜耗热、结霜质量基本不变。热泵机组周期平均制热量随压缩机运行频率并非单调上升,而在80 Hz时出现了最大值,运行频率超过80 Hz后,周期平均制热量反而有所降低。当压缩机运行频率超过73 Hz后,机组周期平均功率增加量已超过了平均制热量的增加量,即提高频率后的整机效率,不如固定频率73 Hz加辅助电热的整机效率。The characteristics of air source heat pump unit at different frequencies under defrosting condition were studied through tests to study the influence of compressor frequency on the heating performance of the heat pump unit.The results show that when the heat pump unit operates in heating mode at frequencies below 80 Hz,the heating capacity,defrosting heat consumption and water mass of frosting in one heating-defrosting cycle are basically kept unchanged.The average output of heat pump unit does not increase monotonically with compressor operating frequency,however,it reaches maximum at 80 Hz,after the operating frequency exceeds 80 Hz,the periodical average heating output decreases somewhat with continuous increasing frequency.When the operating frequency exceeded 73 Hz,the increase of heating output of the unit has exceeded the increase of average heating output,that is,the efficiency of the whole machine after frequency is increased is less than that of the whole machine with fixed frequency of 73 Hz plus auxiliary electric heating.

关 键 词：融霜工况 压缩机运行频率 空气源热泵 制热性能 

分 类 号：TH12[机械工程—机械设计及理论]