家电科技2024，Vol.2Issue(2)：92-97,102,7.DOI:10.19784/j.cnki.issn1672-0172.2024.02.014
电子膨胀阀的开度对变频除湿机低温工况下除湿性能的影响
The influence of electronic expansion valve opening on the dehumidification performance of inverter dehumidifiers under low-temperature operating conditions
摘要
Abstract
Under low-temperature operating conditions,frost layer is easy to appear on the evaporator coil surface of the refrigerated dehumidifier,thus its dehumidification performance is deteriorated.In order to improve the dehumidification performance of the refrigerated dehumidifier under low-temperature conditions,a variable-frequency dehumidifier performance test system was builded.The effect of the electronic expansion valve opening on the operating parameters,dehumidification performance,and frost phenomenon of the dehumidification system was experimentally investigated under low-temperature operating conditions with different combinations of compressor frequency and fan speed.The following conclusions were drawn:the increase in the electronic expansion valve opening can increase the evaporating temperature,so that the lowest temperature point of the evaporator is postponed to the second half of the process,and the frost layer appears first in areas with sparse condensate distribution,alleviating the frost phenomenon and improving the dehumidification performance.When the evaporating temperature reaches near-4℃,the frost covering rate is close to 100％,and the evaporator coil surface is seriously frosted,at the same time the suction pressure is abnormally lowered to 0.2 MPa.The experimental results shows,the evaporating temperature of-4℃ and the suction pressure of 0.2 MPa can be used as a general criterion for the start of defrosting.The research results can provide optimization direction and reference basis for the dehumidification performance enhancement of refrigerated dehumidifier under low-temperature operating conditions.关键词
变频除湿机/低温工况/电子膨胀阀的开度/结霜/除湿性能Key words
Inverter dehumidifier/Low-temperature condition/Electronic expansion valve opening/Frosting/Dehumidification performance分类
信息技术与安全科学引用本文复制引用
路会同,施兴陶,钟玉金,刘迎文..电子膨胀阀的开度对变频除湿机低温工况下除湿性能的影响[J].家电科技,2024,2(2):92-97,102,7.基金项目
企业内部项目"变频除湿机智能控制技术". （）
