制冷学报2024，Vol.45Issue(3)：81-88,96,9.DOI:10.3969/j.issn.0253-4339.2024.03.081
多联式热泵空调用电子膨胀阀进出口流向控制对节流噪声影响的实验研究
Experimental Study on the Effects of Refrigerant Inlet and Outlet Flow Directions on the Throttling Noise of Electronic Expansion Valve in Multi-split Heat Pump Air Conditioners
朱天杰 1詹飞龙 1周绍华 1丁国良 1崔国栋 2刁洪福 2王海胜2
作者信息
- 1. 上海交通大学制冷与低温研究所 上海 200240
- 2. 青岛海尔空调器有限总公司 青岛 266101
- 折叠
摘要
Abstract
The electronic expansion valve(EEV)used in multisplit heat pump air conditioners has the structural characteristics of import and export tubes perpendicular to each other,such that the refrigerant has two forms of flow into the EEV,that is,in the direction perpendicular to the valve needle axis and the direction parallel to the valve needle axis.The sound pressure level of the throttling noise exhibits evident differences in these two directions,and it is necessary to clarify the impact of the flow direction on the throttling noise.The purpose of this study is to design and build an experimental rig that can regulate the refrigerant state flowing into and out of the valve,observe the refrigerant flow pattern,and measure the sound pressure level of the throttling noise,thus obtaining the effects of the refrigerant flow directions on the throttling noise under different refrigerant flow rates and vapor qualities.The results show that when the refrigerant flows from the inlet pipe perpendicular to the direction of the valve needle axis,the throttling noise is mainly the collapse noise of vapor bubbles generated by the refrigerant throttling cavitation,and the overall noise sound pressure level is low.When the refrigerant flows from the inlet pipe parallel to the direction of the valve needle axis,the throttling noise is a combination of the noise due to bubble collapse and the noise due to vibrations of the valve needle,and the overall noise sound pressure level is high.In this experiment,the sound pressure levels of the throttling noise in these two flow directions range from 47.1 dB to 57.1 dB and 61.9 dB to 67.7 dB,respectively.The throttling noise in the air-conditioning system can be effectively reduced by optimizing the design of the refrigerant flow direction of the air-conditioning system and ensuring that the refrigerant always flows into the EEV from the inlet pipe parallel to the direction of the valve needle axis.关键词
多联机/电子膨胀阀/节流噪声/制冷剂流向/实验研究Key words
variable refrigerant flow/electronic expansion valve/throttling noise/refrigerant flow direction/experimental research分类
通用工业技术引用本文复制引用
朱天杰,詹飞龙,周绍华,丁国良,崔国栋,刁洪福,王海胜..多联式热泵空调用电子膨胀阀进出口流向控制对节流噪声影响的实验研究[J].制冷学报,2024,45(3):81-88,96,9.
