【摘要】 针对空气源热泵因室外换热器附着灰尘导致传热恶化的问题，搭建可视化换热器除灰试验台，采用颗粒物粒径为10μm和20μm的混合颗粒，对平直翅片管换热器进行不同喷射角度和风速的除灰试验。结果表明，正面水平喷气情况下，当风速提升到21 m/s时，除灰率达97%；反面水平风速为28 m/s时，除灰率为40%；在16 m/s正向喷射风速下，初始阶段时，空气源热泵室外换热器的除灰率随气流角度逐渐增加而上升，气流角度达到水平偏上30°左右时，除灰率达到最大，为94.7%；当气流角度继续增加时，除灰率开始呈现下降趋势；正向喷射风速为21 m/s时的粉尘脱落质量比也在30°左右达到最大值，为92.9%。研究结果可为优化空气源热泵室外换热器的除灰策略提供重要参考。更多还原

【Abstract】 To address the heat transfer deterioration caused by dust accumulation on outdoor heat exchangers of air-source heat pumps,a visual dust removal test rig was constructed.Using mixed particles with diameters of 10 μm and 20 μm,dust removal tests were conducted on plain finned-tube heat exchangers at different jet angles and wind speeds.Results show that under frontal horizontal jetting,when wind speed reaches 21 m/s,dust removal rate reaches 97%.Under reverse horizontal jetting at 28 m/s,dust removal rate is 40%.At 16 m/s frontal jetting speed,during the initial stage,dust removal rate increases with rising airflow angle,reaching a maximum of 94.7% at approximately 30° above horizontal.When airflow angle further increases,dust removal rate begins to decline.Dust removal mass ratio at 21 m/s frontal jetting speed also peaks around 30° at 92.9%.These findings provide important references for optimizing dust removal strategies of air-source heat pump outdoor heat exchangers.更多还原