TW201812183A - Multi-wing fan - Google Patents
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- TW201812183A TW201812183A TW105128651A TW105128651A TW201812183A TW 201812183 A TW201812183 A TW 201812183A TW 105128651 A TW105128651 A TW 105128651A TW 105128651 A TW105128651 A TW 105128651A TW 201812183 A TW201812183 A TW 201812183A
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Abstract
Description
本發明係關於一種多翼式風機,尤其是一種可使氣流更順暢地進出葉片之多翼式風機。 The present invention relates to a multi-blade fan, and more particularly to a multi-blade fan that allows airflow to enter and exit the blade more smoothly.
請參照第1圖所示,其揭示習知之一風機9,該風機9包含一扇框91及一扇輪92,該扇框91具有一入風口911及一出風口912,該扇輪92可轉動地設置於該扇框91內。藉此,當該扇輪92於該扇框91內轉動時,該扇輪92之數個葉片921即可將氣流由該入風口911牽引至該扇框91內,並驅使該扇框91內的氣流朝該出風口912流出,以達到驅風之目的。 Referring to FIG. 1 , a fan 9 is disclosed. The fan 9 includes a frame 91 and a fan wheel 92 . The fan frame 91 has an air inlet 911 and an air outlet 912 . The fan wheel 92 can be It is rotatably disposed in the fan frame 91. Therefore, when the fan wheel 92 rotates in the fan frame 91, the plurality of blades 921 of the fan wheel 92 can draw the airflow from the air inlet 911 into the fan frame 91, and drive the fan frame 91. The airflow flows out toward the air outlet 912 to achieve the purpose of driving the wind.
當該風機9為離心式風機時,該入風口911通常為一軸向入風口,且該出風口912通常為一徑向出風口,亦即該扇輪92之數個葉片921驅使氣流朝該出風口912流出時,受驅動之該氣流將會沿一徑向方向離開數個葉片921。 When the fan 9 is a centrifugal fan, the air inlet 911 is generally an axial air inlet, and the air outlet 912 is generally a radial air outlet, that is, the plurality of blades 921 of the fan wheel 92 drive the airflow toward the When the air outlet 912 flows out, the driven air flow will leave the plurality of blades 921 in a radial direction.
請參照第2圖所示,當該入風口911的開口過大時,在一軸向方向的投影上,該數個葉片921的部份結構會落在該入風口911所涵蓋的範圍內,並導致通過該入風口911的氣流會同時沿軸向方向及徑向方向進入該數個葉片921,如此一來,不僅使得氣流無法平順地以相同方向流進及流出該數個葉片921,且來自不同方向的氣流亦會在該數個葉片921間形成紊流與渦漩,進而降低風機的導風能力。 Referring to FIG. 2, when the opening of the air inlet 911 is too large, a part of the structure of the plurality of blades 921 falls within the range covered by the air inlet 911 in the projection in the axial direction, and The airflow passing through the air inlet 911 enters the plurality of blades 921 in the axial direction and the radial direction at the same time, so that not only the airflow cannot flow smoothly into and out of the plurality of blades 921 in the same direction, and The airflow in different directions also forms turbulence and vortex between the plurality of blades 921, thereby reducing the wind guiding capability of the fan.
有鑑於此,本發明提供一種多翼式風機,以解決習知風機之 導風能力不佳的問題。 In view of this, the present invention provides a multi-blade fan to solve the problem of poor wind guiding capability of the conventional fan.
本發明之目的係提供一種多翼式風機,該多翼式風機之入風口未延伸超過該數個葉片的內側端,可使氣流更順暢地進出葉片,具有提升導風能力的效果。 The object of the present invention is to provide a multi-blade fan, wherein the air inlet of the multi-blade fan does not extend beyond the inner end of the plurality of blades, so that the airflow can smoothly enter and exit the blade, and has the effect of improving the air guiding capability.
為達到前述發明目的,本發明之多翼式風機,包含:一扇框,該扇框具有一入風口、一出風口及一容置空間,該入風口及該出風口係連通該容置空間;及一扇輪,該扇輪可轉動地設置於該容置空間內,該扇輪包含一輪轂及數個葉片,該數個葉片係設置於該輪轂之外周緣,且該數個葉片分別具有一內側端及一外側端,該扇輪係界定一汲風範圍,該汲風範圍的外周係通過該數個葉片之該內側端,在一軸向方向的投影上,該入風口所涵蓋的範圍係位於該汲風範圍所涵蓋的範圍內。藉此,不僅可使氣流同以徑向方向而平順地流進及流出該數個葉片,更能避免氣流在該數個葉片間形成紊流與渦漩,具有提升風機之導風能力的效果。 In order to achieve the foregoing object, the multi-blade fan of the present invention comprises: a frame having an air inlet, an air outlet and an accommodating space, wherein the air inlet and the air outlet communicate with the accommodating space And a fan wheel, the fan wheel is rotatably disposed in the accommodating space, the fan wheel includes a hub and a plurality of blades, the plurality of blades are disposed on a periphery of the hub, and the plurality of blades are respectively Having an inner end and an outer end, the fan wheel system defines a hurricane range, and the outer circumference of the hurricane range passes through the inner end of the plurality of blades, and the air inlet covers the projection in an axial direction The range is within the range covered by this hurricane range. Thereby, not only the airflow can flow smoothly into and out of the plurality of blades in the radial direction, but also the airflow can be prevented from forming turbulence and vortex between the plurality of blades, thereby improving the air guiding capability of the fan. .
其中,該入風口在一徑向方向上具有一最大口徑,該汲風範圍在該徑向方向上可形成一參考圓,且該參考圓具有一參考直徑,該最大口徑與該參考直徑的比值係大於0.5且小於0.85。藉此,不僅可使氣流同以徑向方向而平順地流進及流出該數個葉片,更能避免氣流在該數個葉片間形成紊流與渦漩,具有提升風機之導風能力的效果。 Wherein, the air inlet has a maximum diameter in a radial direction, the hurricane range can form a reference circle in the radial direction, and the reference circle has a reference diameter, and the ratio of the maximum aperture to the reference diameter The system is greater than 0.5 and less than 0.85. Thereby, not only the airflow can flow smoothly into and out of the plurality of blades in the radial direction, but also the airflow can be prevented from forming turbulence and vortex between the plurality of blades, thereby improving the air guiding capability of the fan. .
其中,該數個葉片分別具有一迎風面,該數個葉片各自之該迎風面係位於該內側端及該外側端之間。藉此,可使該數個葉片之該迎風面能以較佳的方向迎合該氣流的流入方向,避免氣流在該數個葉片間形成紊流與渦漩,具有提升風機之導風能力的效果。 The plurality of blades respectively have a windward surface, and the windward surface of each of the plurality of blades is located between the inner end and the outer end. Thereby, the windward surface of the plurality of blades can be adapted to the inflow direction of the airflow in a better direction to prevent the airflow from forming turbulence and vortex between the plurality of blades, and has the effect of improving the wind guiding capability of the fan. .
其中,該數個葉片之該迎風面係為一凹曲面。藉此,可使該數個葉片之該迎風面能以較佳的方向迎合該氣流的流入方向,避免氣流在 該數個葉片間形成紊流與渦漩,具有提升風機之導風能力的效果。 Wherein, the windward surface of the plurality of blades is a concave curved surface. Thereby, the windward surface of the plurality of blades can be adapted to the inflow direction of the airflow in a better direction to prevent the airflow from forming turbulence and vortex between the plurality of blades, and has the effect of improving the wind guiding capability of the fan. .
其中,各該葉片之該迎風面具有一曲率中心,各該葉片之該曲率中心與各自之該內側端及該外側端的連線係形成一葉片弧角,該葉片弧角係介於130度至170度之間。藉此,可使該數個葉片之該迎風面能以較佳的方向迎合該氣流的流入方向,避免氣流在該數個葉片間形成紊流與渦漩,具有提升風機之導風能力的效果。 Wherein, the windward mask of each of the blades has a center of curvature, and a center of the curvature of each of the blades forms a blade arc angle with a line connecting the inner end and the outer end, and the blade arc angle is between 130 degrees to Between 170 degrees. Thereby, the windward surface of the plurality of blades can be adapted to the inflow direction of the airflow in a better direction to prevent the airflow from forming turbulence and vortex between the plurality of blades, and has the effect of improving the wind guiding capability of the fan. .
其中,該數個葉片之該迎風面的曲率相同。藉此,可使該數個葉片之該迎風面能以較佳的方向迎合該氣流的流入方向,避免氣流在該數個葉片間形成紊流與渦漩,具有提升風機之導風能力的效果。 Wherein, the curvature of the windward surface of the plurality of blades is the same. Thereby, the windward surface of the plurality of blades can be adapted to the inflow direction of the airflow in a better direction to prevent the airflow from forming turbulence and vortex between the plurality of blades, and has the effect of improving the wind guiding capability of the fan. .
其中,該各該葉片之該內側端與該輪轂之中心的連線係形成一第一參考線,各該葉片之鄰近該內側端的該迎風面的切線係延伸形成一第二參考線,該第一參考線與該第二參考線係形成一設置夾角,該設置夾角係介於40度至80度之間。藉此,可使該數個葉片之該迎風面能以較佳的方向迎合該氣流的流入方向,避免氣流在該數個葉片間形成紊流與渦漩,具有提升風機之導風能力的效果。 The line connecting the inner end of the blade to the center of the hub forms a first reference line, and the tangent of the windward surface adjacent to the inner end of each blade extends to form a second reference line. A reference line forms a set angle with the second reference line, and the set angle is between 40 degrees and 80 degrees. Thereby, the windward surface of the plurality of blades can be adapted to the inflow direction of the airflow in a better direction to prevent the airflow from forming turbulence and vortex between the plurality of blades, and has the effect of improving the wind guiding capability of the fan. .
其中,該輪轂之中心係沿一軸向方向朝向該入風口。藉此,可使該入風口與該扇輪的位置彼此對應,進而使通過該入風口的氣流可均勻地流向該扇輪,具有提升風機之導風能力的效果。 Wherein, the center of the hub faces the air inlet in an axial direction. Thereby, the position of the air inlet and the fan wheel can be made to correspond to each other, and the airflow passing through the air inlet can be uniformly flowed to the fan wheel, thereby having the effect of improving the air guiding capability of the fan.
其中,該輪轂之中心係正對該入風口之中心。藉此,可使該入風口與該扇輪的位置彼此對應,進而使通過該入風口的氣流可均勻地流向該扇輪,具有提升風機之導風能力的效果。 Wherein, the center of the hub is directly at the center of the air inlet. Thereby, the position of the air inlet and the fan wheel can be made to correspond to each other, and the airflow passing through the air inlet can be uniformly flowed to the fan wheel, thereby having the effect of improving the air guiding capability of the fan.
其中,該入風口具有一導流部,該導流部係由該入風口的周緣朝該容置空間內凸出。藉此,該導流部可使氣流更順暢地由該入風口進入該容置空間,具有提升風機之導風能力的效果。 The air inlet has a flow guiding portion protruding from the periphery of the air inlet into the accommodating space. Thereby, the flow guiding portion can smoothly enter the accommodating space from the air inlet through the air inlet, and has the effect of improving the air guiding capability of the fan.
1‧‧‧扇框 1‧‧‧Fan frame
11‧‧‧入風口 11‧‧‧Air inlet
111‧‧‧導流部 111‧‧‧Drainage Department
12‧‧‧出風口 12‧‧‧air outlet
13‧‧‧容置空間 13‧‧‧ accommodating space
2‧‧‧扇輪 2‧‧‧fan wheel
21‧‧‧輪轂 21‧‧·wheels
22‧‧‧葉片 22‧‧‧ blades
22a‧‧‧迎風面 22a‧‧‧ Windward side
221‧‧‧內側端 221‧‧‧Inside
222‧‧‧外側端 222‧‧‧Outside
C‧‧‧汲風範圍 C‧‧‧ Hurricane Range
D1‧‧‧最大口徑 D1‧‧‧Max caliber
D2‧‧‧參考直徑 D2‧‧‧ reference diameter
O‧‧‧曲率中心 O‧‧‧ Curvature Center
R1‧‧‧第一曲線 R1‧‧‧ first curve
R2‧‧‧第二曲線 R2‧‧‧ second curve
θ 1‧‧‧葉片弧角 θ 1‧‧‧blade angle
θ 2‧‧‧設置夾角 θ 2‧‧‧Set the angle
9‧‧‧風機 9‧‧‧Fan
91‧‧‧扇框 91‧‧‧Fan frame
911‧‧‧入風口 911‧‧‧ inlet
912‧‧‧出風口 912‧‧ vents
92‧‧‧扇葉 92‧‧‧ fan leaves
921‧‧‧葉片 921‧‧‧ leaves
第1圖:習知風機之結構示意圖。 Figure 1: Schematic diagram of the structure of the known fan.
第2圖:習知風機之氣流路徑示意圖。 Figure 2: Schematic diagram of the airflow path of a known fan.
第3圖:本發明多翼式風機之結構示意圖。 Figure 3 is a schematic view showing the structure of the multi-blade fan of the present invention.
第4圖:本發明多翼式風機之俯視圖。 Figure 4: Top view of the multi-blade fan of the present invention.
第5圖:本發明多翼式風機之氣流路徑示意圖。 Figure 5: Schematic diagram of the airflow path of the multi-blade fan of the present invention.
第6圖:本發明多翼式風機之葉片弧角示意圖。 Fig. 6 is a schematic view showing the blade arc angle of the multi-blade fan of the present invention.
第7圖:本發明多翼式風機之設置夾角示意圖。 Figure 7 is a schematic view showing the arrangement angle of the multi-blade fan of the present invention.
第8圖:本發明多翼式風機之葉片與氣流路徑示意圖。 Figure 8 is a schematic view of the blade and airflow path of the multi-wing fan of the present invention.
第9圖:風扇運轉測試曲線圖。 Figure 9: Fan running test curve.
為讓本發明之上述及其他目的、特徵及優點能更明顯易懂,下文特舉本發明之較佳實施例,並配合所附圖式,作詳細說明如下: The above and other objects, features and advantages of the present invention will become more <RTIgt;
請同時參照第3及4圖所示,本發明之多翼式風機包含一扇框1及一扇輪2,該扇輪2設置於該扇框1內。 Referring to FIGS. 3 and 4, the multi-blade fan of the present invention includes a frame 1 and a fan wheel 2, and the fan wheel 2 is disposed in the frame 1.
該扇框1具有一入風口11、一出風口12及一容置空間13,該入風口11及該出風口12係連通該容置空間13,且在一徑向方向上,該入風口11具有一最大口徑D1。在本實施例中,該入風口11在該徑向方向上可為一圓形,且該最大口徑D1可視為該入風口11之一直徑。又,該入風口11具有一導流部111,該導流部111係由該入風口11的周緣朝該容置空間13內凸出。藉此,該導流部111可使氣流更順暢地由該入風口11進入該容置空間13,具有提升風機之導風能力的效果。 The fan frame 1 has an air inlet 11 , an air outlet 12 , and an accommodating space 13 . The air inlet 11 and the air outlet 12 communicate with the accommodating space 13 , and in a radial direction, the air inlet 11 Has a maximum diameter D1. In this embodiment, the air inlet 11 may have a circular shape in the radial direction, and the maximum diameter D1 may be regarded as one of the diameters of the air inlet 11 . Moreover, the air inlet 11 has a flow guiding portion 111 which protrudes from the periphery of the air inlet 11 into the accommodating space 13. Thereby, the flow guiding portion 111 allows the airflow to enter the accommodating space 13 more smoothly from the air inlet 11 and has the effect of improving the air guiding capability of the fan.
該扇輪2可轉動地設置於該容置空間13內,該扇輪2包含一輪轂21及數個葉片22,該數個葉片22係設置於該輪轂21之外周緣,且該數個葉片22分別具有一內側端221及一外側端222,該數個葉片22 之該內側端221係朝向該輪轂21之中心,該數個葉片22之該外側端222係背向該輪轂21之中心,該扇輪2係界定一汲風範圍C,該汲風範圍C的外周係通過該數個葉片22之該內側端221,在一軸向方向的投影上,該入風口11所涵蓋的範圍係位於該汲風範圍C所涵蓋的範圍內。藉此,可避免該入風口11的開口過大,進而使氣流能以更順暢的方式通過該扇輪2,具有提升風機之導風能力的效果。 The fan wheel 2 is rotatably disposed in the accommodating space 13 . The fan wheel 2 includes a hub 21 and a plurality of blades 22 . The plurality of blades 22 are disposed on the outer periphery of the hub 21 , and the plurality of blades 22 has an inner end 221 and an outer end 222, the inner end 221 of the plurality of vanes 22 facing the center of the hub 21, and the outer end 222 of the plurality of vanes 22 is facing away from the center of the hub 21. The fan wheel 2 defines a hurricane range C, and the outer circumference of the hurricane range C passes through the inner end 221 of the plurality of blades 22, and the range covered by the air inlet 11 is in the projection in an axial direction. Located within the range covered by this hurricane range C. Thereby, the opening of the air inlet 11 can be prevented from being excessively large, and the airflow can be passed through the fan wheel 2 in a smoother manner, thereby having the effect of improving the air guiding capability of the fan.
其中,該輪轂21之中心係沿一軸向方向朝向該入風口11,或者如本實施例所示,該輪轂21之中心係正對該入風口11之中心。藉此,可使該入風口11與該扇輪2的位置彼此對應,進而使通過該入風口11的氣流可均勻地流向該扇輪2,具有提升風機之導風能力的效果。 Wherein, the center of the hub 21 faces the air inlet 11 in an axial direction, or as shown in this embodiment, the center of the hub 21 is directly opposite to the center of the air inlet 11. Thereby, the position of the air inlet 11 and the fan wheel 2 can be made to correspond to each other, and the airflow passing through the air inlet 11 can be uniformly flowed to the fan wheel 2, which has the effect of improving the air guiding capability of the fan.
又,當該數個葉片22係以一圓周方向設置於該輪轂21之外周緣時,該汲風範圍C在該徑向方向上可形成一參考圓,且該參考圓具有一參考直徑D2,在該入風口11具有該最大口徑D1的情況下,該最大口徑D1與該參考直徑D2的比值係大於0.5且小於0.85。藉此,可避免該入風口11的開口過大,進而使氣流能以更順暢的方式通過該扇輪2,具有提升風機之導風能力的效果。 Moreover, when the plurality of blades 22 are disposed on the outer circumference of the hub 21 in a circumferential direction, the hurricane range C may form a reference circle in the radial direction, and the reference circle has a reference diameter D2. In the case where the air inlet 11 has the maximum aperture D1, the ratio of the maximum aperture D1 to the reference diameter D2 is greater than 0.5 and less than 0.85. Thereby, the opening of the air inlet 11 can be prevented from being excessively large, and the airflow can be passed through the fan wheel 2 in a smoother manner, thereby having the effect of improving the air guiding capability of the fan.
請同時參照第4及5圖所示,更詳言之,當該入風口11之該最大口徑D1與該扇輪2之該參考直徑D2的比值係大於0.5且小於0.85時,可使該最大口徑D1與該參考直徑D2維持特定比例,以避免該入風口11的最大口徑D1過大,進而調整氣流進入該數個葉片22的方向。進一步而言,在該軸向方向的投影上,由於該入風口11所涵蓋的範圍係位於該汲風範圍C所涵蓋的範圍內,使得通過該入風口11的氣流不會立刻接觸該數個葉片22,且該氣流由該入風口11朝該數個葉片22流動的過程中,該氣流自身的流向會由軸向方向逐漸轉變為徑向方向,進而使該氣流能沿徑向方向流進該數個葉片22,再同以徑向方向流出該數個葉片22。藉此,不僅 可使氣流同以徑向方向而平順地流進及流出該數個葉片22,更能避免氣流在該數個葉片22間形成紊流與渦漩,具有提升風機之導風能力的效果。 Please refer to FIGS. 4 and 5 at the same time. In more detail, when the ratio of the maximum diameter D1 of the air inlet 11 to the reference diameter D2 of the fan wheel 2 is greater than 0.5 and less than 0.85, the maximum can be made. The aperture D1 maintains a specific ratio with the reference diameter D2 to prevent the maximum diameter D1 of the air inlet 11 from being excessively large, thereby adjusting the direction in which the airflow enters the plurality of blades 22. Further, in the projection of the axial direction, since the range covered by the air inlet 11 is within the range covered by the hurricane range C, the airflow passing through the air inlet 11 does not immediately contact the plurality of airflows. During the flow of the airflow from the air inlet 11 to the plurality of blades 22, the flow direction of the airflow itself gradually changes from the axial direction to the radial direction, thereby allowing the airflow to flow in the radial direction. The plurality of blades 22 flow out of the plurality of blades 22 in the radial direction. Thereby, not only the airflow can flow smoothly into and out of the plurality of blades 22 in the radial direction, but also the airflow can be prevented from forming turbulence and vortex between the plurality of blades 22, thereby improving the air guiding capability of the fan. Effect.
請參照第6圖所示,該數個葉片22分別具有一迎風面22a,該數個葉片22各自之該迎風面22a係位於該內側端221及該外側端222之間,在本實施例中,該數個葉片22之該迎風面22a係為一凹曲面,且該數個葉片22之該迎風面22a的曲率相同。 As shown in FIG. 6, the plurality of blades 22 respectively have a windward surface 22a, and the windward surface 22a of each of the plurality of blades 22 is located between the inner end 221 and the outer end 222, in this embodiment. The windward surface 22a of the plurality of blades 22 is a concave curved surface, and the curvature of the windward surface 22a of the plurality of blades 22 is the same.
更詳言之,各該葉片22之該迎風面22a可因自身的曲率而具有一曲率中心O,各該葉片22之該曲率中心O與各自之該內側端221及該外側端222的連線係形成一葉片弧角θ 1,該葉片弧角θ 1係介於130度至170度之間。 More specifically, the windward surface 22a of each of the blades 22 may have a center of curvature O due to its own curvature, and the center of curvature O of each of the blades 22 is connected to the respective inner end 221 and the outer end 222. A blade arc angle θ 1 is formed, which is between 130 degrees and 170 degrees.
請參照第7圖所示,又,各該葉片22之該內側端221與該輪轂21之中心的連線係形成一第一參考線,各該葉片22之鄰近該內側端221的該迎風面22a的切線係延伸形成一第二參考線,該第一參考線與該第二參考線係形成一設置夾角θ 2,該設置夾角θ 2係介於40度至80度之間。 Referring to FIG. 7, the connection between the inner end 221 of each of the blades 22 and the center of the hub 21 forms a first reference line, and the windward side of each of the blades 22 adjacent to the inner end 221 The tangent line of 22a extends to form a second reference line, and the first reference line forms a set angle θ 2 with the second reference line, and the set angle θ 2 is between 40 degrees and 80 degrees.
請同時參照第4及8圖所示,當該輪轂21旋轉時,該數個葉片22可隨該輪轂21同步轉動,當氣流欲沿該徑向方向流進該數個葉片22時,在該數個葉片22之葉片弧角θ 1介於130度至170度之間,以及該數個葉片22之設置夾角θ 2介於40度至80度之間的情況下,該數個葉片22之該迎風面22a能以較佳的彎弧方向迎合該氣流的流入方向,不僅可使氣流能以更順暢的方式碰抵該迎風面22a,以避免氣流在該數個葉片22間形成紊流與渦漩,更可使該氣流能沿著該迎風面22a的弧度而順利流出該葉片22,進而具有提升風機之導風能力的效果。 Referring to FIGS. 4 and 8 simultaneously, when the hub 21 rotates, the plurality of blades 22 can rotate synchronously with the hub 21, and when the airflow is to flow into the plurality of blades 22 in the radial direction, When the blade arc angle θ 1 of the plurality of blades 22 is between 130 degrees and 170 degrees, and the set angle θ 2 of the plurality of blades 22 is between 40 degrees and 80 degrees, the plurality of blades 22 The windward surface 22a can meet the inflow direction of the airflow in a better arcing direction, and can not only make the airflow hit the windward surface 22a in a smoother manner, so as to prevent the airflow from forming turbulence between the plurality of blades 22. The vortex allows the airflow to smoothly flow out of the blade 22 along the arc of the windward surface 22a, thereby having the effect of enhancing the wind guiding capability of the fan.
為證明本發明之多翼式風機確實具有提升導風能力的效果,以下特以本發明之多翼式風扇與習知風機進行一運轉測試,在該運轉 測試中,習知風機與本發明之多翼式風機具有類似之該扇框1及該扇輪2,習知風機之該入風口的最大口徑與該扇輪的參考直徑的比值為1;此外,本發明之多翼式風機之該入風口11的最大口徑D1與該扇輪2的參考直徑D2的比值為0.7。請參照第9圖所示,該測試結果的橫座標為一風量(單位:CMM),縱坐標為一全壓效率(單位:%),其中,全壓效率(%)=空氣動力(kw)/風機的軸動力(kw)。本發明之多翼式風機的運轉測試結果係表示為一第一曲線R1,習知風機的運轉測試結果係表示為一第二曲線R2,由該第8圖可知,在低風量(小於20CMM)的操作環境下,本發明之多翼式風機的全壓效率高於習知風機之全壓效率,本發明可在低風量的操作環境下提升風機的導風能力。 In order to prove that the multi-blade fan of the present invention does have the effect of improving the air guiding capability, the following is a running test of the multi-blade fan of the present invention and a conventional fan. In the running test, the conventional fan and the present invention are used. The multi-blade fan has a similar fan frame 1 and the fan wheel 2, and the ratio of the maximum diameter of the air inlet of the conventional fan to the reference diameter of the fan wheel is 1; in addition, the multi-blade fan of the present invention The ratio of the maximum diameter D1 of the air inlet 11 to the reference diameter D2 of the fan wheel 2 is 0.7. Please refer to Figure 9, the horizontal coordinate of the test result is a wind volume (unit: CMM), and the ordinate is a full pressure efficiency (unit: %), wherein the total pressure efficiency (%) = aerodynamics (kw) / Fan shaft power (kw). The operation test result of the multi-wing fan of the present invention is expressed as a first curve R1, and the operation test result of the conventional fan is expressed as a second curve R2, which is known from the eighth figure, in a low air volume (less than 20 CMM) In the operating environment, the full-pressure efficiency of the multi-blade fan of the present invention is higher than the full-pressure efficiency of the conventional fan, and the present invention can improve the wind guiding capability of the fan in a low air volume operating environment.
綜上所述,本發明之多翼式風機之入風口未延伸超過該數個葉片的內側端,不僅使氣流能同以徑向方向而平順地流進及流出該數個葉片,更能避免氣流在該數個葉片間形成紊流與渦漩,具有提升風機之導風能力的效果。 In summary, the air inlet of the multi-blade fan of the present invention does not extend beyond the inner end of the plurality of blades, so that the airflow can flow smoothly into and out of the plurality of blades in a radial direction, thereby avoiding The airflow forms turbulence and vortex between the plurality of blades, and has the effect of improving the wind guiding capability of the fan.
雖然本發明已利用上述較佳實施例揭示,然其並非用以限定本發明,任何熟習此技藝者在不脫離本發明之精神和範圍之內,相對上述實施例進行各種更動與修改仍屬本發明所保護之技術範疇,因此本發明之保護範圍當視後附之申請專利範圍所界定者為準。 While the invention has been described in connection with the preferred embodiments described above, it is not intended to limit the scope of the invention. The technical scope of the invention is protected, and therefore the scope of the invention is defined by the scope of the appended claims.
Claims (10)
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