Full
Outline
To address the issues of insufficient air volume and abnormal sound quality in the dual centrifugal fan system with reversing scroll，based on the single‑factor analysis method，the influence laws of blade profile，volute tongue structure，and collector form on the aerodynamic performance of the fan system were investigated，and structural optimization design of the air‑conditioning scroll reversing centrifugal fan was carried out to obtain the fan structure scheme with the best comprehensive performance.Orthogonal experiments were adopted to clarify the influence weights of structural parameters such as volute tongue inclination angle，anti‑swirl ring height，and guide ring outlet diameter on the performance of the optimized fan.The results show that the order of influence weights of each parameter on air volume is guide ring outlet diameter>volute tongue inclination angle>anti‑swirl ring height；the order of influence weights on sound quality is volute tongue inclination angle>guide ring outlet diameter>anti‑swirl ring height.Considering both air volume and sound quality indicators，the preferred scheme achieves an air volume of 1 223 m3/h，which is about 5% higher than the original scheme，and the noise peak is reduced by about 5 dB.This study can provide a reference for the design of air‑conditioning scroll reversing centrifugal fans.
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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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