摘要
本文对采用回风加湿的风冷冰箱果蔬室的湿度进行了实验研究,根据实验观测数据建立果蔬室湿度数学模型,结合实验数据与CFD模拟结果,对普通风冷冰箱冷藏室的风道结构及风机控制方案进行优化设计。通过CFD模拟,本文进一步研究了回风加湿过程中冷藏室内湿空气温度及水蒸气体积率的分布情况,研究了回风过程中风速大小、回风时间对冷藏室内空气相对湿度的影响。结果表明,通过优化风机控制方案,果蔬室在加湿3min后,平均湿度由上升3.8%提高为上升10%。回风风速越高,平均相对湿度越大。当采用风速2m/s时,果蔬室的平均湿度提高1.5%,上部间室的平均湿度提高2%。
In this paper,the humidified of refrigerator fresh-keeping chamber with return air process was studied experimentally.The CFD model for fresh-keeping chamber was established based on experimental observations.The structure of air duct in refrigerator and the control scheme for fan were optimized according to the experiment data and CFD results.Furthermore,the distributions of temperature of wet-air and steam volume fraction in refrigerator were simulated with CFD model.The influences of return-air's speed and duration on relative humidity were also studied.The results show that,by optimizing the fan control scheme,the average relative humidity jumped from 3.8%increase to 10%with return air process in fresh-keeping chamber humidified after 3min.The higher return-air's speed was,the greater average relative humidity was.when the speed of return-air is 2m/s,The average relative humidity of fresh-keeping chamber and upper compartment were increased 1.5%and 2%,respectively.
出处
《电器》
2013年第S1期176-180,共5页
China Appliance
关键词
风冷冰箱
果蔬室
回风加湿
风机控制
CFD
Frost-free Refrigerator
Fresh-keeping Chamber
Return-air process
Fan's control scheme
CFD
