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Outline
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.
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| 科 Family | 属数 Number of genus | 种数 Number of species | 占总种数比例 Percentage of total species (%) | 属 Genus | 种数 Number of species | 占总种数比例 Percentage of total species (%) |
|---|---|---|---|---|---|---|
| 鹅膏菌科Amanitaceae | 2 | 11 | 5.26 | 鹅膏菌属 Amanita | 10 | 4.78 |
| 小菇科 Mycenaceae | 2 | 12 | 5.74 | 丝盖伞属 Inocybe | 5 | 2.39 |
| 多孔菌科 Polyporaceae | 8 | 14 | 6.70 | 蜡蘑属 Laccaria | 5 | 2.39 |
| 红菇科 Russulaceae | 3 | 23 | 11.00 | 小皮伞属 Marasmius | 6 | 2.87 |
| 小菇属 Mycena | 11 | 5.26 | ||||
| 光柄菇属 Pluteus | 5 | 2.39 | ||||
| 红菇属 Russula | 17 | 8.13 | ||||
| 栓菌属 Trametes | 5 | 2.39 |
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