制冷剂泄漏对除湿机结霜特性的影响研究  

The impact study of refrigerant leakage on frosting characteristics of the dehumidifier

作　　者：马佩佩 谈裕辉 田洁 刘丹华 谭裕锋 MA Peipei;TAN Yuhui;TIAN Jie;LIU Danhua;TAN Yufeng(Hisense Home Appliance Group Co.,Ltd.,Shunde 528300)

机构地区：[1]海信家电集团股份有限公司,广东顺德528300

出　　处：《家电科技》2022年第1期86-90,95,共6页Journal of Appliance Science & Technology

摘　　要：现有除湿机主要选用毛细管作为节流部件,当发生制冷剂泄漏时,易出现结霜问题从而降低除湿机的能效。基于实验对除湿机R32制冷剂泄漏过程的结霜情况及除霜保护进行研究,结果表明:当R32制冷剂除湿机除霜保护程序未考虑制冷剂泄漏工况时,会出现除霜保护失效的现象;当其他条件不变时,室内干球温度与蒸发器的结霜面积和结霜时间呈线性负相关,除湿机制冷剂泄漏率与蒸发器的结霜时间呈非线性相关,后续除霜保护程序可基于此调节除霜保护程序的除霜时间和风机转速以降低除霜能耗;蒸发器内温度分布受制冷剂泄漏率和室内干球温度影响较大,后续除霜保护程序可基于此确定除霜保护准进温度及感温包位置,以提升除霜保护的启动准确性。Capillary is applied as the throttling component in most dehumidifiers. When the dehumidifier leaks refrigerant, the dehumidifier is prone to frost which reduces the energy efficiency. Based on experiments to study the frosting situation and defrosting protection of the R32 refrigerant leakage process in the dehumidifier. The results indicate that The R32 refrigerant dehumidifier defrosting protection program will fail when overlooked the refrigerant leak conditions. When other conditions remain constant, the indoor dry bulb temperature is linearly negatively related to the frosting area and frosting time of the evaporator, and the refrigerant leakage rate of the dehumidifier is non-linearly related to the frosting time of the evaporator. The subsequent defrosting protection program can adjust the defrosting time and the fan’s speed to decrease defrosting energy consumption base on the previous study. The inner distribution of the evaporator is affected significantly by the refrigerant leakage rate and indoor dry bulb temperature. The later defrosting protection program can set the defrosting protection enter temperature and the position of the temperature-sensing element to improve the accuracy of defrosting protection.

关 键 词：除湿机 制冷剂泄漏 结霜 除霜保护 R32 

分 类 号：TB6[一般工业技术—制冷工程]