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CN103016401A - A new type of axial flow fan for outdoor unit of air conditioner - Google Patents

A new type of axial flow fan for outdoor unit of air conditioner Download PDF

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CN103016401A
CN103016401A CN2013100097750A CN201310009775A CN103016401A CN 103016401 A CN103016401 A CN 103016401A CN 2013100097750 A CN2013100097750 A CN 2013100097750A CN 201310009775 A CN201310009775 A CN 201310009775A CN 103016401 A CN103016401 A CN 103016401A
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trailing edge
air conditioner
fan blade
fan
conditioner outdoor
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CN103016401B (en
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陈望明
温选锋
杨昕
毛义胜
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Guangdong Sunwill Precising Plastic Co Ltd
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Guangdong Sunwill Precising Plastic Co Ltd
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Abstract

The invention relates to a novel axial flow fan for an air conditioner outdoor unit, which comprises a hub and at least two fan blades positioned on the hub, and is characterized in that small guide vanes extending backwards are arranged on the tail edges of the fan blades. The invention adopts the structure that the small guide vane at the tail edge extends backwards on the tail edge of the fan blade of the axial flow fan, thereby effectively improving the wake impact between the fan blade and the downstream fixed element, reducing the flow loss and being beneficial to energy conservation, simultaneously changing the flow distance of the airflow on the fan blade and generating the difference of vortex shedding pace, thereby generating the phase difference of the noise radiated outwards by the noise source on the surface of the downstream fixed element, achieving the purpose of reducing the noise, improving the aerodynamic performance of the fan blade, and effectively solving the problems that the jet wake impacts the downstream fixed element when the existing axial flow fan operates, is not beneficial to energy conservation, has large noise and the like.

Description

一种空调室外机用新型轴流风扇A new type of axial flow fan for outdoor unit of air conditioner

技术领域 technical field

本发明涉及空调领域,特别是一种空调室外机用新型轴流风扇。 The invention relates to the field of air conditioners, in particular to a novel axial flow fan for an air conditioner outdoor unit.

背景技术 Background technique

目前的空调室外机用轴流风扇，如图5所示，包括轮毂1＇、位于轮毂1＇上的扇叶2＇，扇叶2＇包括前缘3＇、压力面、吸力面5＇以及尾缘6＇。并且扇叶尾缘均为连续变化的圆弧过渡形结构。气流经过扇叶前缘，通过扇叶叶面的做功，从尾缘部位流出，这种扇叶在使用过程中的不足之处是：（1）压力面气流速度高，吸力面气流速度低，两者流速的差异造成了射流尾迹，这一尾迹对下游固定元件，如格栅，造成了冲击，不利于节能；（2）叶片尾缘产生了旋涡脱落，涡脱落频率沿扇叶径向分布的一致性使得扇叶下游固定元件表面产生了强烈的交替脉动，从而产生了强烈的干涉噪声。 The current axial flow fan for outdoor air conditioner, as shown in Figure 5, includes a hub 1', a fan blade 2' located on the hub 1', and the fan blade 2' includes a front edge 3', a pressure surface, a suction surface 5' and The trailing edge is 6'. And the trailing edge of the fan blade is a continuously changing circular arc transition shape structure. The airflow passes through the front edge of the fan blade, and flows out from the trailing edge through the work done by the blade surface. The disadvantages of this kind of fan blade during use are: (1) The air velocity on the pressure surface is high, and the air velocity on the suction surface is low. The difference in flow velocity between the two causes jet wakes, which impact downstream fixed components, such as grilles, and are not conducive to energy saving; (2) Vortex shedding occurs at the trailing edge of the blade, and the frequency of vortex shedding is distributed along the radial direction of the fan blade The consistency makes the surface of the fixed element downstream of the fan blade produce strong alternating pulsation, which produces strong interference noise.

发明内容 Contents of the invention

本发明的目的在于针对上述存在问题和不足，提供一种既可有效提高扇叶气动性能，又能有效降低风扇气动噪声和减少整体损失，且使用节能的空调室外机用新型轴流风扇。 The object of the present invention is to address the above existing problems and deficiencies, to provide a new type of axial flow fan for air conditioner outdoor unit that can effectively improve the aerodynamic performance of the fan blade, effectively reduce the aerodynamic noise of the fan and reduce the overall loss, and use energy saving.

本发明的技术方案是这样实现的： Technical scheme of the present invention is realized like this:

本发明所述空调室外机用新型轴流风扇，包括轮毂、位于轮毂上的至少两扇叶，其特点是所述扇叶的尾缘上设有向后延伸的尾缘小导叶。 The novel axial flow fan for an air conditioner outdoor unit of the present invention includes a hub and at least two fan blades located on the hub, and is characterized in that the trailing edge of the fan blade is provided with a small guide vane extending backward.

为使靠近扇叶外缘与尾缘小导叶外端形成的通道均匀变化，以有利于在这一区域达到出口速度均匀分布的目的，上述尾缘小导叶为前大后小的收缩状叶片结构，该叶片的外缘做成圆弧形或斜线形结构、里缘做成直线形结构。由于尾缘小导叶外端做成圆弧过渡或斜线形，而里缘做成直线形结构，使得整个尾缘小导叶在流动方向上呈收缩结构，也有利于降低尾缘小导叶对气流的粘性损失。 In order to make the channel formed near the outer edge of the fan blade and the outer end of the small guide vane at the trailing edge change evenly, so as to facilitate the uniform distribution of the exit velocity in this area, the small guide vane at the trailing edge is in a contracted shape with a large front and a small rear. Blade structure, the outer edge of the blade is made into a circular arc or oblique structure, and the inner edge is made into a linear structure. Since the outer end of the small trailing vane is made into a circular arc transition or oblique shape, and the inner edge is made into a straight line structure, the entire small trailing vane is in a shrinking structure in the flow direction, which is also conducive to reducing the flow rate of the small trailing vane. Viscous loss to airflow.

为使本发明在能够达到降低噪声和提高扇叶气动性能的目的的同时，又结构简单，加工简易，上述尾缘小导叶的后缘做成直线形结构。 In order to achieve the purpose of reducing noise and improving the aerodynamic performance of the fan blade, the present invention has a simple structure and easy processing, and the trailing edge of the small guide vane at the trailing edge is made into a linear structure.

至于尾缘小导叶设置在扇叶尾缘上的具体位置可根据需要来定。当尾缘小导叶位于扇叶尾缘上不同位置时，虽然涡脱落频率仍然一致，但尾缘小导叶改变了扇叶尾缘涡脱落时间差，从而起到了调相的作用，使下游固定元件表面的噪声源向外辐射的噪声产生相位差，达到抵消部分声能的作用，达到降低噪声的目的。为进一步减小轴流风扇的尾迹涡的范围，上述扇叶尾缘的外端与轮毂轴线的径向垂直距离要大于尾缘小导叶的外缘与轮毂轴线的径向垂直距离。由于尾缘小导叶从扇叶外端向里移近一定距离，使得压力面高速气流向尾迹涡区域增加能量，从而达到减小尾迹涡的范围和降低气动噪声的目的。 As for the specific position where the small guide vane at the trailing edge is arranged on the trailing edge of the fan blade, it can be determined according to needs. When the small guide vanes at the trailing edge are located at different positions on the trailing edge of the fan blade, although the frequency of vortex shedding is still the same, the small guide vanes at the trailing edge change the time difference of the vortex shedding at the trailing edge of the fan blade, thereby playing a role of phase modulation, making the downstream fixed The noise radiated from the noise source on the surface of the component produces a phase difference, which can offset part of the sound energy and reduce the noise. In order to further reduce the scope of the wake vortex of the axial flow fan, the radial vertical distance between the outer end of the trailing edge of the above-mentioned fan blade and the hub axis is greater than the radial vertical distance between the outer edge of the small guide vane at the trailing edge and the hub axis. Since the small guide vane at the trailing edge moves a certain distance inward from the outer end of the fan blade, the high-speed airflow on the pressure surface increases energy to the wake vortex area, thereby achieving the purpose of reducing the scope of the wake vortex and reducing aerodynamic noise.

其中上述尾缘小导叶的尾缘外端与轮毂轴线的径向垂直距离R与扇叶外径D2之间的比值范围为：R/D2 =0.3~1.0。上述尾缘小导叶的前缘宽度B1与扇叶外径D2的比值范围为：B1/D2=0.01~0.2；所述尾缘小导叶的后缘宽度B2与扇叶外径D2的比值范围为：B2/D2=0.005~0.2。上述尾缘小导叶的里端宽度L与扇叶外径D2的比值范围为：L/D2=0.01~0.2。 Wherein the ratio range between the radial vertical distance R between the outer end of the trailing edge of the small trailing edge guide vane and the axis of the hub and the outer diameter D 2 of the fan blade is: R/D 2 =0.3~1.0. The ratio range of the leading edge width B1 of the small trailing edge guide vane to the outer diameter D2 of the fan blade is: B1/D 2 =0.01~0.2; the trailing edge width B2 of the small trailing edge guide vane and the outer diameter D2 of the fan blade The range of the ratio is: B2/D 2 =0.005~0.2. The range of the ratio of the width L of the inner end of the small guide vane at the trailing edge to the outer diameter D 2 of the fan blade is: L/D 2 =0.01~0.2.

本发明由于采用在轴流风扇的扇叶尾缘设置向后延伸的尾缘小导叶结构，使得扇叶与下游固定元件之间的尾迹冲击有所改善，减小了流动损失、有利于节能；另一方面，气流在扇叶尾缘产生涡脱落时，增加的尾缘小导叶使得气流在扇叶上的流动距离发生了变化，涡脱落的步调也产生差异，即涡脱落频率的步调不一致，从而使下游固定元件表面的噪声源向外辐射的噪声产生相位差（简单地说新增的尾缘小导叶结构起到了调相器的作用），达到抵消部分声能的作用，从而达到降低噪声的目的，同时也提高扇叶气动性能，有效地解决了现有的轴流风扇运行时射流尾迹对下游固定元件造成冲击、不利于节能及噪声大等问题。并且本发明结构简单、加工简易，可广泛地应用于各种室调上。 Because the present invention adopts the small guide vane structure extending backward at the trailing edge of the fan blade of the axial flow fan, the wake impact between the fan blade and the downstream fixed element is improved, the flow loss is reduced, and it is beneficial to energy saving ; on the other hand, when the airflow produces vortex shedding at the trailing edge of the fan blade, the increased small guide vane at the trailing edge changes the flow distance of the airflow on the fan blade, and the pace of vortex shedding is also different, that is, the pace of vortex shedding frequency Inconsistency, so that the noise radiated from the noise source on the surface of the downstream fixed element produces a phase difference (simply speaking, the newly added small guide vane structure at the trailing edge acts as a phase modulator) to offset part of the sound energy, thereby The purpose of reducing noise is achieved, and at the same time, the aerodynamic performance of the fan blade is improved, which effectively solves the problems of the impact of the jet wake on the downstream fixed components when the existing axial flow fan is running, which is not conducive to energy saving and high noise. Moreover, the present invention has simple structure and easy processing, and can be widely applied to various room adjustments.

下面结合附图对本发明作进一步的说明。 The present invention will be further described below in conjunction with the accompanying drawings.

附图说明 Description of drawings

图1为本发明一实施例的结构示意图。 Fig. 1 is a schematic structural diagram of an embodiment of the present invention.

图2为图1中扇叶的侧视图。 Fig. 2 is a side view of the fan blade in Fig. 1 .

图3为本发明另一实施例的结构示意图。 Fig. 3 is a schematic structural diagram of another embodiment of the present invention.

图4为图3中扇叶的侧视图。 Fig. 4 is a side view of the fan blade in Fig. 3 .

图5为现有轴流风扇的结构示意图。 Fig. 5 is a schematic structural diagram of an existing axial flow fan.

具体实施方式 Detailed ways

如图1-图4所示，本发明所述空调室外机用新型轴流风扇，包括轮毂1、位于轮毂1上的至少两扇叶2，各扇叶2包括前缘3、压力面4、吸力面5以及尾缘6，为了有效降低运行时的整体噪声，所述扇叶2的尾缘6上设有向后延伸的尾缘小导叶7。由于采用这样的结构，使得扇叶2与下游固定元件之间的尾迹冲击有所改善，从而减小了流动损失，另一方面，尾缘小导叶7结构起到了调相器的作用，由于气流在扇叶2尾缘6处产生涡脱落，增加了尾缘小导叶7，使得气流在扇叶2上的流动距离发生的变化，涡脱落的步调也产生差异，从而起到了调相的作用，使下游固定元件表面的噪声源向外辐射的噪声产生相位差，达到抵消部分声能的作用，以达到降低噪声的目的。上述尾缘小导叶7的优选方案是与扇叶2一体成型。上述尾缘小导叶7厚度一般与扇叶2尾缘6厚度相同。由于扇叶2在运行过程中，吸力面5不可避免将产生流动分离，由于压力面4与吸力面5之间的压差作用，扇叶2外缘将产生间隙涡流，此间隙涡流与吸力面5分离流进行混合，由于间隙涡为低速气流，间隙涡的作用将使得吸力面5分离区域增大，造成靠近扇叶2外缘位置的尾迹涡区域增大，从而造成了损失与噪声。为了进一步的减小这一尾迹涡，如图1-图4所示，本发明采用将尾缘小导叶7做为前大后小的收缩状叶片结构，该叶片的外缘做成圆弧形或斜线形结构、里缘做成直线形结构。由于尾缘小导叶7外端做成圆弧过渡或斜线形，而尾缘小导叶7里缘做成直线形结构，在流动方向上，导叶形状为收缩结构，这样布置一方面能够使靠近扇叶2外缘与尾缘小导叶7外端形成的通道均匀变化，有利于在这一区域达到出口速度均匀分布的目的，另一方面，整个导叶在流动方向上呈收缩结构，有利于降低尾缘小导叶7对气流的粘性损失。至于尾缘小导叶7设置在扇叶2尾缘6上的具体位置可根据情况来定。尾缘小导叶7位于扇叶2尾缘6上不同位置时，虽然涡脱落频率仍然一致，但尾缘小导叶7改变了扇叶2尾缘涡脱落时间差，从而起到了调相的作用，使下游固定元件表面的噪声源向外辐射的噪声产生相位差，起到抵消部分声能的作用，达到降低噪声的目的。如图1-2所示，上述尾缘小导叶7可直接设在扇叶2尾缘的外端部处，此时尾缘小导叶7外缘与扇叶2外缘连接一起形成连续变化的圆弧过渡形结构；为了更一步的减小尾迹涡范围，如图3-图4所示，上述扇叶尾缘7的外端与轮毂1轴线的径向垂直距离要大于尾缘小导叶7的外缘与轮毂1轴线的径向垂直距离。也就是说将尾缘小导叶7结构设置在扇叶2尾缘靠近外端部的位置，即从外端向里移进一定距离，使得压力面4高速气流向尾迹涡区域增加能量，从而减小尾迹涡的范围。为使本发明在能够达到降低噪声和提高扇叶气动性能的目的的同时，又结构简单，加工简易，上述尾缘小导叶7的后缘做成直线形结构。其中，上述尾缘小导叶7在轴流风扇上的尺寸大小是：尾缘小导叶7的尾缘外端与轮毂1轴线径向垂直距离R与风扇外径D2之间的比值范围为：R/D2 =0.3~1.0。优选值为R/D2 =0.5~0.8。上述尾缘小导叶7的前缘宽度B1与风扇外径D2的比值范围为：B1/D2=0.01~0.2；所述尾缘小导叶7的后缘宽度B2与风扇外径D2的比值范围为：B2/D2=0.005~0.2。上述尾缘小导叶7的里端宽度L与风扇外径D2的比值范围为：L/D2=0.01~0.2。其中上述各比值范围的优选值为：B1/D2=0.03~0.12，B2/D2=0.01~0.09。L/D2=0.06~0.16。 As shown in Figures 1 to 4, the novel axial flow fan for an air conditioner outdoor unit according to the present invention includes a hub 1 and at least two fan blades 2 located on the hub 1, each fan blade 2 includes a front edge 3, a pressure surface 4, The suction surface 5 and the trailing edge 6, in order to effectively reduce the overall noise during operation, the trailing edge 6 of the fan blade 2 is provided with a small trailing edge guide vane 7 extending backward. Due to the adoption of such a structure, the wake impact between the fan blade 2 and the downstream fixed element is improved, thereby reducing the flow loss. On the other hand, the small guide vane 7 structure at the trailing edge acts as a phase regulator. The air flow produces vortex shedding at the trailing edge 6 of the fan blade 2, and the small guide vane 7 at the trailing edge is added, so that the flow distance of the air flow on the fan blade 2 changes, and the pace of vortex shedding also differs, thus playing the role of phase modulation The effect is to make the noise radiated from the noise source on the surface of the downstream fixed component produce a phase difference, so as to offset part of the sound energy, so as to achieve the purpose of reducing noise. The preferred solution of the small guide vane 7 at the trailing edge is integrally formed with the fan blade 2 . The thickness of the small guide vane 7 at the trailing edge is generally the same as the thickness of the trailing edge 6 of the fan blade 2 . Since the fan blade 2 is in operation, the suction surface 5 will inevitably produce flow separation. Due to the pressure difference between the pressure surface 4 and the suction surface 5, the outer edge of the fan blade 2 will generate a gap vortex. 5 separation flow is mixed, because the gap vortex is a low-speed air flow, the effect of the gap vortex will increase the separation area of the suction surface 5, resulting in the increase of the wake vortex area near the outer edge of the fan blade 2, resulting in loss and noise. In order to further reduce this wake vortex, as shown in Figures 1-4, the present invention adopts the small guide vane 7 at the trailing edge as a shrinking blade structure with a large front and a small rear, and the outer edge of the blade is made into a circular arc Shaped or oblique structure, the inner edge is made into a linear structure. Since the outer end of the small guide vane 7 at the trailing edge is made into a circular arc transition or oblique shape, and the inner edge of the small guide vane 7 at the trailing edge is made into a straight line structure, in the flow direction, the shape of the guide vane is a shrinking structure, so that the arrangement can be achieved on the one hand. Making the channel formed near the outer edge of the fan blade 2 and the outer end of the small guide vane 7 at the trailing edge uniformly changes, which is conducive to achieving the purpose of uniform distribution of the outlet velocity in this area. On the other hand, the entire guide vane is in a shrinking structure in the flow direction , which is beneficial to reduce the viscous loss of the small guide vane 7 on the trailing edge to the airflow. As for the specific position where the small guide vane 7 at the trailing edge is arranged on the trailing edge 6 of the fan blade 2, it can be determined according to the situation. When the small guide vane 7 at the trailing edge is located at different positions on the trailing edge 6 of the fan blade 2, although the frequency of vortex shedding is still the same, the small guide vane 7 at the trailing edge changes the time difference of the vortex shedding at the trailing edge of the fan blade 2, thus playing the role of phase modulation , so that the noise radiated from the noise source on the surface of the downstream fixed component produces a phase difference, which can offset part of the sound energy and achieve the purpose of reducing noise. As shown in Figure 1-2, the above-mentioned small guide vane 7 at the trailing edge can be directly arranged at the outer end of the trailing edge of the fan blade 2. At this time, the outer edge of the small guide vane 7 at the trailing edge is connected with the outer edge of the fan blade 2 to form a continuous Changing circular arc transition shape structure; in order to further reduce the scope of the wake vortex, as shown in Figure 3-Figure 4, the radial vertical distance between the outer end of the fan blade trailing edge 7 and the axis of the hub 1 is greater than that of the trailing edge. The radial vertical distance between the outer edge of the guide vane 7 and the axis of the hub 1 . That is to say, the structure of the small guide vane 7 at the trailing edge is arranged at the position near the outer end of the trailing edge of the fan blade 2, that is, a certain distance is moved inward from the outer end, so that the high-speed airflow on the pressure surface 4 increases energy to the wake vortex area, thereby Reduced the size of the wake vortex. In order to achieve the purpose of reducing noise and improving the aerodynamic performance of the fan blade, the present invention has a simple structure and easy processing, the trailing edge of the small trailing edge guide vane 7 is made into a linear structure. Wherein, the size of the above-mentioned small guide vane 7 on the axial flow fan is: the ratio range between the radial vertical distance R between the outer end of the small guide vane 7 and the axis of the hub 1 and the fan outer diameter D2 It is: R/D 2 =0.3~1.0. The preferred value is R/D 2 =0.5~0.8. The ratio range of the front edge width B1 of the small trailing edge guide vane 7 to the fan outer diameter D2 is: B1/D 2 =0.01~0.2; the trailing edge width B2 of the small trailing edge guide vane 7 and the fan outer diameter D2 The range of the ratio is: B2/D 2 =0.005~0.2. The range of the ratio of the width L of the inner end of the small guide vane 7 at the trailing edge to the outer diameter D 2 of the fan is: L/D 2 =0.01~0.2. Wherein, the preferred values of the ratio ranges above are: B1/D 2 =0.03~0.12, B2/D 2 =0.01~0.09. L/D 2 =0.06~0.16.

本发明中的尾缘小导叶7改善了扇叶2与下游固定元件之间的冲击，同时使得扇叶2尾缘涡脱落频率产生相位差，起到了降低噪声、提高扇叶气动性能的目的，并且本发明结构简单，加工简易，可广泛地应用于各种室调上。 The small guide vane 7 at the trailing edge of the present invention improves the impact between the fan blade 2 and the downstream fixed element, and at the same time causes a phase difference in the vortex shedding frequency at the trailing edge of the fan blade 2, thereby reducing noise and improving the aerodynamic performance of the fan blade , and the present invention is simple in structure, easy to process, and can be widely applied to various room adjustments.

表1给出现有技术与本发明技术（新技术）的实验数据，新技术采用了R/D2=0.8，B1/D2=0.075，B2/D2=0.07，L/D2=0.082的尾缘小导叶结构。 Table 1 shows the experimental data of the prior art and the technology (new technology) of the present invention. The new technology adopts R/D 2 =0.8, B1/D 2 =0.075, B2/D 2 =0.07, L/D 2 =0.082 Trailing edge small guide vane structure.

表1 现有技术与新技术的实验比较 Table 1 Experimental comparison between existing technology and new technology

方案plan 噪声(dB)Noise(dB) 风量(m3/h)Air volume(m 3 /h) 转速（r/min）Speed (r/min) 功率(W)Power (W) 现有技术current technology 50.650.6 16131613 904904 4949 新技术new technology 48.548.5 16301630 890890 5050

从上表中可以看出，新技术有利于降低噪声和提高风量。 As can be seen from the table above, the new technology is conducive to reducing noise and increasing air volume.

尽管本发明是参照具体实施例来描述，但这种描述并不意味着对本发明构成限制。参照本发明的描述，所公开的实施例的其他变化，对于本领域技术人员都是可以预料的，这种的变化应属于所属权利要求所限定的范围内。 Although the invention has been described with reference to specific embodiments, such description is not meant to limit the invention. With reference to the description of the present invention, other changes of the disclosed embodiments are expected by those skilled in the art, and such changes shall fall within the scope defined by the appended claims.

Claims (10)

1. an air conditioner outdoor machine Novel axial fan comprises wheel hub (1), is positioned at least two flabellums (2) on the wheel hub (1), it is characterized in that the trailing edge (6) of described flabellum (2) is provided with the little stator of the trailing edge that extends back (7).
2. air conditioner outdoor machine Novel axial fan according to claim 1 is characterized in that the little stator of above-mentioned trailing edge (7) is pre-large post-small contraction-like blade structure, and the outer rim of this blade does in the arc-shaped or oblique line shape structure, inner edge are made rectilinear structure.
3. air conditioner outdoor machine Novel axial fan according to claim 1 and 2 is characterized in that the trailing edge of the little stator of above-mentioned trailing edge (7) is made rectilinear structure.
4. air conditioner outdoor machine Novel axial fan according to claim 1 is characterized in that the little stator of above-mentioned trailing edge (7) thickness is identical with flabellum (2) trailing edge (6) thickness.
5. air conditioner outdoor machine Novel axial fan according to claim 1 is characterized in that the outer end of above-mentioned flabellum trailing edge (7) and the radially perpendicular distance of wheel hub (1) axis are greater than the outer rim of the little stator of trailing edge (7) and the radially perpendicular distance of wheel hub (1) axis.
6. air conditioner outdoor machine Novel axial fan according to claim 1 is characterized in that the trailing edge outer end of the little stator of above-mentioned trailing edge (7) and radially perpendicular distance R and the fan D outer diameter of wheel hub (1) axis 2Between ratio range be: R/D 2=0.3 ~ 1.0.
7. air conditioner outdoor machine Novel axial fan according to claim 1 is characterized in that the leading edge width B 1 and fan D outer diameter of the little stator of above-mentioned trailing edge (7) 2Ratio range be: B1/D 2=0.01 ~ 0.2; The trailing edge width B 2 of the little stator of described trailing edge (7) with the ratio range of fan D outer diameter 2 is: B2/D 2=0.005 ~ 0.2.
8. air conditioner outdoor machine Novel axial fan according to claim 7 is characterized in that above-mentioned B1/D 2=0.03 ~ 0.12, B2/D 2=0.01 ~ 0.09.
9. air conditioner outdoor machine Novel axial fan according to claim 1 is characterized in that inner end width L and the fan D outer diameter of the little stator of above-mentioned trailing edge (7) 2Ratio range be: L/D 2=0.01 ~ 0.2.
10. air conditioner outdoor machine Novel axial fan according to claim 9 is characterized in that above-mentioned L/D 2=0.06 ~ 0.16.
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CN114165479A (en) * 2021-12-13 2022-03-11 珠海格力电器股份有限公司 Fan blade structure and air conditioner with same

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