| 摘要: |
| 为筛选出分流性能较好的空调用压降式分配器类型，需要掌握现有不同类型压降式分配器的分流特性。本文设计并搭建了分配器的分流均匀性检测实验台，并对现有的反射式分配器、射流环分配器、文丘里式分配器和带过滤网分配器等4种压降式分配器的分流不均匀度进行了测试。测试工况涵盖空调系统正常运行的制冷剂体积流量范围为32~125 L/h、干度范围为0.15~0.22，且分配器安装角度与竖直方向的偏斜角度在0°~90°之间变化。结果表明，大的制冷剂体积流量入口或分配器垂直安装条件下更有利于分配器分流均匀性的提升；在这4种分配器中，带过滤网分配器在所有实验工况下的分流不均匀度均小于0.05，表现出良好的分流均匀性，适合不同的安装角度和流量工况。 |
| 关键词: 空调器 分配器 分流均匀性 两相流 |
| DOI： |
| Received:April 13, 2022Revised:May 05, 2022 |
| 基金项目:国家自然科学基金（51906135）资助项目。 |
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| Experimental Comparison on Distribution Uniformity Among Different Types of Refrigerant Distributors Used in Air-conditioners |
|
Liu Lu1, Zhan Feilong1, Ding Guoliang1, Meng Jianjun2, Shi Lihua2, Wang Qingjie2
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| (1.College of Mechanical and Power Engineering, Shanghai Jiao Tong University;2.Qingdao Hisense Hitachi Air Conditioning Systems Co., Ltd.) |
| Abstract: |
| When selecting the type of pressure-drop distributor for air conditioners with good distribution performance, the divergence of the distribution uniformity among the existing types of pressure-drop distributors should be checked. In this study, an experimental rig for testing the distribution homogeneity of distributors was designed and established. Thereafter, the distribution unevenness of existing reflection-type, jet loop-type, Venturi-type, and filter-type distributors were measured and compared. The testing conditions include a refrigerant volumetric flow rate of 32–125 L/h and a vapor quality of 0.15–0.22, which represent the normal operating conditions of room air conditioners. The installation angle of the distributor between the central axis of the distributor and the vertical direction ranged from 0° to 90°. The results demonstrate that a large mass flow rate of the inlet refrigerant or the vertical installation of the distributor is beneficial to distribution uniformity. The filter-type distributor exhibited good distribution uniformity under various experimental conditions, with a distribution unevenness of less than 0.05. Thus, the filter-type distributor is most suitable for air conditioners. |
| Key words: air-conditioner distributor distribution uniformity two-phase flow |
