家电科技 ›› 2021, Vol. 0 ›› Issue (5): 36-40.doi: 10.19784/j.cnki.issn1672-0172.2021.05.004

• 论文 • 上一篇    下一篇

风冷冰箱开关门过程中箱室内温度场变化的CFD模拟

刘璐1, 詹飞龙1, 丁国良1, 韩晓蕾2   

  1. 1.上海交通大学机械与动力工程学院 上海 200240;
    2.松下电器研究开发(苏州)有限公司 江苏苏州 215123
  • 出版日期:2021-09-01 发布日期:2021-10-12
  • 通讯作者: 丁国良,E-mail:glding@sjtu.edu.cn。
  • 作者简介:刘璐,硕士研究生。研究方向:制冷系统仿真及优化。地址:上海市闵行区东川路800号。E-mail:ll631461014@sjtu.edu.cn。

CFD simulation of temperature field in frost-free refrigerator during the door opening and closing process

LIU Lu1, ZHAN Feilong1, DING Guoliang1, HAN Xiaolei2   

  1. 1. College of Mechanical and Power Engineering, Shanghai Jiao Tong University Shanghai 200240;
    2. Panasonic R&D Center Suzhou Co., Ltd. Suzhou 215123
  • Online:2021-09-01 Published:2021-10-12

摘要: 常见风冷式冰箱在使用过程中经常要将箱门进行开关操作,箱室内温度均匀性会遭到破坏并影响食品存储。以开发冰箱开关门过程的仿真方法为研究目的,并对典型风冷式冰箱各箱室在开关门条件下的箱室内侵入热量变化特征进行分析。采用CFD动网格方法,将冰箱开关门过程分解为门打开的过程、门维持打开状态的过程以及门关闭的过程,并对过程中每个离散时间点下的箱室内平均温度以及回风口气体质量流量进行监测,从而计算得到一个完整开关门过程中的箱室内侵入热量大小。对冷藏室、冷冻室和变温室在相同开关门条件下的箱室内侵入热量进行了计算,结果表明各箱室在开门过程中的室内温升速率最大、在关门过程中的室内温升速率最小,且冷冻室在整个开关门过程中的总侵入热量最大,其箱室内温度分布不均匀性也最严重。

关键词: 冰箱, 开关门, 温度场, 模拟方法

Abstract: Refrigerator doors may frequently suffer opening and closing process for the commonly used frost-free refrigerator. The uniformity of temperature in each compartment of refrigerator will be destroyed during the door opening and closing process, resulting in the damage of food storage quality. The purpose of this study is to develop a simulation method for the door opening and closing process of a frost-free refrigerator, and to analyze the temperature variation in each compartment of a typical frost-free refrigerator under the condition of door opening and closing. In the method of CFD dynamic grid, a whole door opening and closing process is divided into three sub-process, including the sub-process of door opening, the sub-process of door opening maintaining, and the sub-process of door closing. The total thermal loss is calculated through monitoring the average temperature of refrigerator and the average mass flow rate of outlet air for each discrete time point. The thermal loss of the refrigeration compartment, the variable temperature compartment and the freezer compartment under the same door opening and closing conditions is calculated, and the results show that the large increase rate of temperature in each compartment occurs in the door opening process, and low increase rate of temperature of temperature in each compartment occurs in the door closing process. The thermal loss in the freezer compartment is larger than that in the variable temperature compartment or in the refrigeration compartment, meaning that the temperature non-uniformity in the freezer compartment is the worst.

Key words: Refrigerator, Door opening and closing, Temperature field, Simulation method

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