The pressure surface of a tubular fan is composed of two arcs, the inner edge section and the outer edge section. A turning point is formed between the inner edge section and the outer edge section, which is 27% of the length of the wing chord away from the outer edge of the wing chord. The ratio of the radius of the outer edge section to the inner edge section is 1:1.35+0.1. Through the improvement of the structure, the airflow first passes through the inner edge section, which accounts for 73% of the working time. The pressure radius of the section is too large and the function force is too small. The main function of the section is to buffer and rectify, also known as the buffer section. The airflow then passes through the outer edge section, which accounts for 27% of the total, and the pressure radius of the section is too small and the function force is strong to complete the main work. Because the evaporator of the conventional air conditioning indoor unit is two rows of tubes, the resistance of the whole unit is small, and the cross-flow fan does not need much functional power, so the buffer section of the cross-flow blade wing can be enlarged as much as possible to improve the noise quality of the cross-flow fan, which has strong practicability.
【技术实现步骤摘要】
一种贯流式风扇的翼片结构
本技术涉及一种贯流式风扇的翼片结构。
技术介绍
中国专利文献号为CN2402847Y于2000年10月25日公开一种空调器贯流风扇,它包括叶片和法兰盘,多个叶片沿法兰盘的圆周排列形成筒形,叶片与该筒的轴向呈一定的夹角,叶片沿法兰盘的圆周不等距分布。据称,该结构共有偶数个法兰盘将叶片沿轴向截成奇数个小段风扇,同一小段风扇中的每个叶片与风扇轴向的夹角是相同的,且至少有一个小段风扇的叶片与风扇轴向是平行的,可以实现风力集中,风距加长,以及加大风量的效果。但是,该结构的风叶叶片是单段圆弧制成,风叶工作时为单段圆弧受压,气流进入叶栅时没有缓冲段,从而造成进气冲击大,易紊乱,导致空调室内机噪音大,旋转噪音突出,舒适性差,不能满足用户的使用需求。因此,有必要进一步改进。
技术实现思路
本技术的目的旨在提供一种结构简单合理、出风顺畅、风量大、叶片进风效率高、工作噪音小、制造成本低、易生产、易实现且安全可靠的贯流式风扇的翼片结构,以克服现有技术中的不足之处。按此目的设计的一种贯流式风扇的翼片结构,其特征在于:翼片的压力面由两段圆弧组成,分别为內缘段和外缘段;內缘段和外缘段之间形成转折点,该转折点在从翼弦的外周端离开翼弦长27%的位置形成;外缘段和内缘段的圆弧半径比值为1:1.35±0.1。所述翼片的压力面型线靠近风扇外部的切线、与风扇转动方向之间形成外周角,该外周角为30.1°±0.5。所述翼片的弦长与风扇的径向之间形成摆角,该摆角为26.9°±0.5°。所述翼片的压力面型线与风扇中心轴线之间形成包角,该包角为7.8°±0.5°。所述翼片呈倾斜设置、且其倾 ...
【技术保护点】
1.一种贯流式风扇的翼片结构,其特征在于:翼片的压力面由两段圆弧组成,分别为內缘段(1)和外缘段(2);內缘段(1)和外缘段(2)之间形成转折点(A),该转折点(A)在从翼弦的外周端离开翼弦长27%的位置形成;外缘段(2)和内缘段(1)的圆弧半径比值为1:1.35±0.1。
【技术特征摘要】
1.一种贯流式风扇的翼片结构,其特征在于:翼片的压力面由两段圆弧组成,分别为內缘段(1)和外缘段(2);內缘段(1)和外缘段(2)之间形成转折点(A),该转折点(A)在从翼弦的外周端离开翼弦长27%的位置形成;外缘段(2)和内缘段(1)的圆弧半径比值为1:1.35±0.1。2.根据权利要求1所述贯流式风扇的翼片结构,其特征在于:所述翼片的压力面型线靠近风扇外部的切线、与风扇转动方向之间形成外周角(β),该外周角(β)...
【专利技术属性】
技术研发人员:毛军祥,叶涛,杨宇,
申请(专利权)人:广东顺威精密塑料股份有限公司,
类型:新型
国别省市:广东,44
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