一种提升空调换热的室外机分布式流路模型开发  

Development of Numerical Model of Distributed Flow Path for Outdoor Units to Improve Heat Transfer of Air Conditioner

作　　者：张浩 何哲旺 武滔 吴国明[3] 任滔[3] 丁国良[3] ZHANG Hao;HE Zhewang;WU Tao;WU Guoming;REN Tao;DING Guoliang(Guangdong Midea Refrigeration Equipment Co. Ltd,Foshan,Guangdong 528311,China;School of Urban and Environmental Engineering,Chongqing University,Chongqing 400044,China;Institute of Refrigeration and Cryogenics,Shanghai Jiao Tong University,Shanghai 200240,China)

机构地区：[1]广东美的制冷设备有限公司,广东佛山528311 [2]重庆大学城市建设与环境工程学院,重庆400044 [3]上海交通大学制冷与低温工程研究所,上海200240

出　　处：《制冷技术》2019年第2期40-45,共6页Chinese Journal of Refrigeration Technology

摘　　要：空调换热器通常使用流路数目均一的常规流路,很难让空调器在不同的冷媒流动特性下均具有最佳的换热状态。本文提出了一种室外换热器的分布式流路的模型,来提升空调器的换热。本文针对室外换热器微元建立分流模型,求解获得最大微元换热量的极限质流密度;并通过室外换热器分布式分流模型求解整个换热器的分布式流路,使得室外换热器任何位置处的制冷剂质流密度尽可能接近极限质流密度。本文对一款常用的室外换热器进行分布式流路设计。采用分布式流路的室外换热器的额定制热量和低温制热量分别比采用流路数目均一的常规流路高8.8%和5.6%。The widely used flow paths of outdoor units have the constant path number from the inlet to the outlet, which leading to a bad heat transfer due to the different flowing characteristics of refrigerant between the inlet and the outlet. A distributed flow path is proposed for the outdoor units to improve the heat transfer of air conditioners. The path number is variable with the refrigerant quality in the outdoor unit. A distribution model is set up based on a small control volume to calculate the critical mass flow density which maximize the heat transfer capacity. The distributed flow path is designed for outdoor to make the mass flow density in the whole outdoor unit as close as possible to the critical mass flow density. A type of common air conditioner is used to design the distributed flow path. The capacities of air conditioner with distributed flow path under the rated heating condition and low temperature heating condition are 8.8% and 5.6% higher than that of widely used flow path, respectively.

关 键 词：空调器 室外换热器 分布式流路 数值模型 

分 类 号：TB657.2[一般工业技术—制冷工程]