TWI742712B

TWI742712B - Fan impeller structure

Info

Publication number: TWI742712B
Application number: TW109119013A
Authority: TW
Inventors: 孫頌偉; 李名哲
Original assignee: 奇鋐科技股份有限公司
Priority date: 2020-06-05
Filing date: 2020-06-05
Publication date: 2021-10-11
Also published as: TW202146775A

Abstract

本發明係一種扇葉結構，包括一輪轂及一葉片組，該輪轂具有一頂壁及一自該頂壁周緣延伸的側壁，該葉片組具有複數上葉片與複數下葉片，該複數上、下葉片係呈上、下交錯設在該側壁，每一該上葉片設有一第一前緣與一第一後緣係自該第一前緣沿該上葉片長度方向向下斜伸且共同界定一第一迎風面，該每一該下葉片設有一第二前緣與一第二後緣係自該第二前緣沿該下葉片長度方向向上斜伸且共同界定一第二迎風面，其中該第一迎風面是面朝下方該下葉片的第二後緣方向設置，該第二迎風面是面朝上方該上葉片的第一後緣方向設置，透過本發明此設計，可令流體得持續不斷的加壓，進而降低震動及噪音以及減少馬達耗電的效果。The present invention is a fan blade structure, including a hub and a blade set. The hub has a top wall and a side wall extending from the periphery of the top wall. The blade set has a plurality of upper blades and a plurality of lower blades. The blades are staggered up and down on the side wall, and each of the upper blades is provided with a first leading edge and a first trailing edge extending downwardly from the first leading edge along the length of the upper blade and jointly defining a A first windward surface, each of the lower blades is provided with a second front edge and a second trailing edge that extend upwardly from the second front edge along the length of the lower blade and jointly define a second windward surface, wherein the The first windward surface is facing downward and the second trailing edge of the lower blade is set, and the second windward surface is facing upwards and the first trailing edge of the upper blade is set. Through the design of the present invention, the fluid can be sustained. Continuously pressurize, thereby reducing vibration and noise, and reducing the effect of motor power consumption.

Description

扇葉結構Fan blade structure

本發明有關於一種扇葉結構，尤指一種可達到對氣流不斷增壓及降低噪音的扇葉結構。The present invention relates to a fan blade structure, in particular to a fan blade structure that can continuously pressurize airflow and reduce noise.

近年來隨著電子產業的發展，電子裝置的性能不斷提升，其內部晶片組的數量和運算速度不斷提升，使得電子裝置所散發的熱量也相應增加，因此散熱風扇在電子元件結構內部運用越來越廣泛。參閱第1A、1B圖，習知一般離心風扇1包括一上板11、一底板12、一入風口13、一出風口14及一扇葉結構15，該底板12的外周緣向上圍繞有一側板121，該上板11蓋合在該底板12上，該上板11與底板12及側板21共同界定一容設空間16是用以容設該扇葉結構15，且該扇葉結構15透過一軸心(圖中未示)與該底板12具有的一軸筒122相樞設，該入風口13與出風口14分別開設於該上板11及該側板121一側。該扇葉結構15包括一輪轂151與複數徑向葉片152，該複數徑向葉片152係環設在該輪轂151的外周側上，每一該徑向葉片152設有一自由端1521、一朝該輪轂151之中心的固定端1522、一迎風面1523與一對應該迎風面1523的背風面1524，該複數徑向葉片152的固定端1522固定連接在該輪轂151的外周側上，其自由端1521與該側板121內表面之間界定有一氣流通道157，該複數徑向葉片152的迎風面1523為呈相同朝向且彼此相平行，並兩兩徑向葉片152之間形成有一呈徑向的流道156。所以當該離心風扇1運轉時，該扇葉結構15沿逆時針旋轉，該複數徑向葉片152會將外面氣流17軸向導引到該上板11的入風口13內，使氣流17從該複數徑向葉片152的固定端1522進入到各自流道156內加壓且以徑向方向從該自由端1521流出(甩出)至該氣流通道157內，並沿著該側板121內表面從徑向的該出風口14流出。但習知離心風扇1卻延伸另一問題，就是習知的軸向氣流17進入到每一徑向葉片152的流道156內時，因每一徑向葉片152對氣流17的加壓距離只是短短的徑向葉片152弦長，以致於氣流17於流道156內還來不及被徑向葉片152加壓就甩出去了，且這些還來不及被加壓大部分的氣流17會直接由各徑向葉片152的自由端1521甩出而不斷撞擊到該側板121內表面後，才會於該氣流通道157內並朝該出風口14方向向外流出，由於前述原因以致於造成噪音大、震動大及產生無法提升風扇風壓及風量的問題，且還會造成離心風扇馬達耗電耗能等諸多問題。另外，習知的該複數徑向葉片152是採用很密集排列形成在該輪轂151外周側上，以導致於實際製造上的模具是不好開模，相對的成本也提高。 In recent years, with the development of the electronics industry, the performance of electronic devices has continued to improve, and the number of internal chipsets and computing speed have continued to increase, resulting in a corresponding increase in the heat radiated by electronic devices. Therefore, cooling fans are increasingly used inside the structure of electronic components. The more extensive. Referring to Figures 1A and 1B, the conventional centrifugal fan 1 includes an upper plate 11, a bottom plate 12, an air inlet 13, an air outlet 14 and a fan blade structure 15. The outer periphery of the bottom plate 12 is surrounded by a side plate 121 upward. , The upper plate 11 covers the bottom plate 12, the top plate 11, the bottom plate 12 and the side plates 21 jointly define an accommodating space 16 for accommodating the fan blade structure 15, and the fan blade structure 15 passes through a shaft The core (not shown in the figure) is pivotally arranged with a shaft tube 122 of the bottom plate 12, and the air inlet 13 and the air outlet 14 are respectively opened on the side of the upper plate 11 and the side plate 121. The fan blade structure 15 includes a hub 151 and a plurality of radial blades 152. The plurality of radial blades 152 are arranged on the outer peripheral side of the hub 151. Each of the radial blades 152 is provided with a free end 1521, which faces the The fixed end 1522 at the center of the hub 151 is a windward surface 1523 and a leeward surface 1524 corresponding to the windward surface 1523. The fixed end 1522 of the plurality of radial blades 152 is fixedly connected to the outer peripheral side of the hub 151, and the free end 1521 An air flow channel 157 is defined between the inner surface of the side plate 121, the windward surfaces 1523 of the plurality of radial blades 152 are in the same direction and parallel to each other, and a radial flow channel is formed between the two radial blades 152 156. Therefore, when the centrifugal fan 1 is running, the fan blade structure 15 rotates counterclockwise, and the plurality of radial blades 152 will axially guide the outer airflow 17 into the air inlet 13 of the upper plate 11, so that the airflow 17 will flow from the The fixed ends 1522 of the plurality of radial blades 152 enter the respective flow passages 156 for pressure and flow out (throw out) from the free end 1521 into the air flow channel 157 in the radial direction, and follow the inner surface of the side plate 121 from the radial direction. It flows out toward the air outlet 14. However, the conventional centrifugal fan 1 has another problem. When the conventional axial air flow 17 enters the flow channel 156 of each radial blade 152, the pressurizing distance of each radial blade 152 to the air flow 17 is only The short radial blades 152 have a chord length, so that the air flow 17 in the flow channel 156 is thrown out before it can be pressurized by the radial blades 152, and most of the air flow 17 that has not been pressurized before it is pressurized will directly flow from each diameter. After being thrown out to the free end 1521 of the blade 152 and continuously hitting the inner surface of the side plate 121, it will flow out in the air flow channel 157 and toward the air outlet 14. Due to the aforementioned reasons, it causes large noise and large vibration. It also causes problems such as the inability to increase the fan's air pressure and air volume, and also causes many problems such as power consumption and energy consumption of the centrifugal fan motor. In addition, the conventional plurality of radial blades 152 are formed on the outer peripheral side of the hub 151 in a dense arrangement, so that the actual manufacturing mold is difficult to open, and the relative cost is also increased.

本發明之一目的在提供一種可達到對流體(如氣流)不斷增壓及降低噪音的扇葉結構。本發明之另一目的在提供一種透過複數上、下葉片交錯設在該輪轂外周側壁的設計，使得能減少葉片設置的數量，且還有利於製造上模具好開模及降低成本的扇葉結構。本發明之另一目的在提供一種一具有複數上、下葉片呈上、下交錯設置的扇葉結構應用於一離心風扇上可達到提升風壓及風量的效果，進而還可降低震動及減少風扇馬達耗電的效果的扇葉結構。本發明係提供一種扇葉結構，包括一輪轂及一葉片組，該輪轂具有一頂壁及一自該頂壁周緣延伸的側壁，該葉片組具有複數上葉片與複數下葉片，該複數上、下葉片係呈上、下交錯設在該側壁，每一該上葉片設有一第一前緣與一第一後緣係自該第一前緣沿該上葉片長度方向向下斜伸且共同界定一第一迎風面，該每一該下葉片設有一第二前緣與一第二後緣係自該第二前緣沿該下葉片長度方向向上斜伸且共同界定一第二迎風面，其中該第一迎風面是面朝對應該下葉片的第二後緣方向設置，該第二迎風面是面朝對應該上葉片的第一後緣方向設置，透過本發明此扇葉結構的設計，使得可達到讓流體(如氣流)得持續不斷增壓(加壓)及降低噪音，且還有效降低成本、降低震動及減少風扇馬達耗電(耗能)的效果。 One object of the present invention is to provide a fan blade structure that can continuously pressurize fluid (such as air flow) and reduce noise. Another object of the present invention is to provide a design in which a plurality of upper and lower blades are staggered on the outer peripheral side wall of the hub, so that the number of blades can be reduced, and the blade structure is also conducive to making the upper mold easier to open and reduce the cost. . Another object of the present invention is to provide a fan blade structure with a plurality of upper and lower blades staggered up and down when applied to a centrifugal fan, which can achieve the effect of increasing air pressure and air volume, thereby reducing vibration and reducing the fan. The fan blade structure with the effect of power consumption by the motor. The present invention provides a fan blade structure, including a hub and a blade set. The hub has a top wall and a side wall extending from the periphery of the top wall. The blade set has a plurality of upper blades and a plurality of lower blades. The lower blades are staggered up and down on the side wall, and each of the upper blades is provided with a first front edge and a first rear edge that extend downwardly from the first front edge along the length of the upper blade and jointly define A first windward surface, each of the lower blades is provided with a second front edge and a second rear edge that extend upwardly from the second front edge along the length of the lower blade and jointly define a second windward surface, wherein The first windward surface is arranged facing the direction corresponding to the second trailing edge of the lower blade, and the second windward surface is arranged facing the direction corresponding to the first trailing edge of the upper blade. Through the design of the fan blade structure of the present invention, This makes it possible to continuously pressurize (pressurize) fluids (such as airflow) and reduce noise, and it also effectively reduces costs, reduces vibration, and reduces power consumption (energy consumption) of the fan motor.

本發明之上述目的及其結構與功能上的特性，將依據所附圖式之較佳實施例予以說明。本發明係提供一種扇葉結構，請參閱第2A圖為本發明之第一實施例之扇葉結構立體示意圖；第2B圖為本發明圖2A的側視示意圖；第2C圖為本發明之第一實施例之氣流於該複數上、下葉片之間流動態樣示意圖。如圖所示，該扇葉結構2包括一輪轂21及一葉片組22，該輪轂21具有一頂壁211及一自該頂壁211周緣延伸的側壁212，該側壁212設有一上半部2121及一下半部2122，在本實施例中相鄰該輪轂21外周緣的側壁212之頂端至自底端兩者之間的中心點為上半部2121與下半部2122的分界點，也就是該側壁212之頂端至前述中心點為上半部2121，該中心點至該側壁212之底端為下半部2122，但並不侷限於此。該葉片組22具有複數上葉片221與複數下葉片222，該複數上、下葉片221、222係呈上、下交錯設在該側壁212，在本實施例中該複數上葉片221與該複數下葉片222係交錯設在該上半部2121與該下半部2122，且該複數上、下葉片221、222與該輪轂21的中心線O呈一傾斜角度設置，例如每一該上葉片221係呈30度~70度傾斜角度的設在該上半部2121，該角度較佳為35度~50度，每一該下葉片222呈110度~155度傾斜角度設在該下半部2122，該角度較佳為120度~140度。其中該複數上、下葉片221、222與該輪轂21為一體成型例如塑膠射出或3D列印達成。當然，在其他一實施例，該複數上、下葉片221、222與該輪轂21可為部分一體成型搭配部分非一體成型例如該複數上葉片221(或下葉片222)如塑膠射出成型在該輪轂21的側壁212之上半部2121(或下半部2122)，該複數下葉片222(或上葉片221)採用例如膠接、嵌接或焊接等方式結合在該輪轂21的側壁212之下半部2122(或上半部2121)，或是該複數下葉片222(或上葉片221)面對該輪轂21的一內側端2226(或2216)環接一中空的套接環以套設在該輪轂21的側壁212之下半部2122(或上半部2121)結合為一體。在其他另一實施例，該複數上、下葉片221、222與該輪轂21可皆為非一體成型例如該複數上、下葉片221、222採用例如膠接、嵌接或焊接等方式結合在該輪轂21的側壁212之上半部2121與下半部2122。每一該上葉片221設有一相鄰該頂壁211的第一前緣2211與一第一後緣2212，該第一後緣2212係自該第一前緣2211沿該上葉片221長度方向向下斜伸且共同界定一第一迎風面2213與一對應該第一迎風面2213的第一背風面2214，該第一迎風面2213與第一背風面2214分別設置在該上葉片221的兩側，在該扇葉結構2運轉過程中(如逆時針旋轉)，該扇葉結構2朝向旋轉方向的一側面(前側面)為該第一迎風面2213，另一側面(後側面)為該第一背風面2214，且該第一迎風面2213位於該第一背風面2214的前方，並在本實施例中該第一迎風面2213與第一背風面2214分別呈如凹曲面與凸曲面，以使該上葉片221整體的形狀呈一拱形狀，且每一該上葉片221的厚度係隨如拱形沿伸方向由厚變薄，但並不引以為限。每一該下葉片222設有一相鄰該側壁212底端的第二前緣2221與一第二後緣2222，該第二後緣2222係自該第二前緣2221沿該下葉片222長度方向向上斜伸且共同界定一第二迎風面2223與一對應該第二迎風面2223的第二背風面2224，該第二迎風面2223與第二背風面2224分別設置在該下葉片222的兩側，在本實施例中的複數下葉片222的結構及形狀(如呈拱狀)與前述上葉片221的結構及形狀(如呈拱狀)相同，在此不重新贅述，該上、下葉片221、222差異在於每一該上葉片221的第一迎風面2213是面朝下方對應該下葉片222的第二後緣2222方向設置，每一該下葉片222的第二迎風面2223是面朝上方對應該上葉片221的第一後緣2212方向設置，也就是如第2A、2B圖中該複數上葉片221其中一上葉片221的第一迎風面2213是面朝前斜下方的下葉片222的第二後緣2222方向設置在該上半部2121，前下方的下葉片222的第二迎風面2223是面朝前斜上方的上葉片221的第一後緣2212方向設置在該下半部2122，且該複數上、下葉片221、222的第一迎風面2213與第二迎風面2223是不相面對且呈不相同朝向，該第一背風面2214與該第二背風面2224也為呈不相同朝向。在一可行實施例中，該上葉片221的形狀與該下葉片222的形狀可為相同或不相同，例如該上葉片221的形狀也可為呈弧狀(或拱狀)，且該上葉片221的第一迎風面2213與第一背風面2214分別呈如凹弧面與凸弧面，該下葉片222的形狀也可為呈拱狀(或弧狀)，且該下葉片222的第二迎風面2223與第二背風面2224分別呈如凹曲面與凸曲面，或是該上、下葉片221、222的形狀為相同皆呈弧狀(或拱狀)。在本實施例中每一該上葉片221的第一前緣2211的厚度大於該第一後緣2212的厚度，及每一該下葉片222的第二前緣2221的厚度大於該二後緣的厚度，且每一該上葉片221的該第一前緣2211與面對前下方的該下葉片222的第二後緣2222是不在同一軸線上，每一該上葉片221的第一後緣2212與對應後下方的下葉片222的第二前緣2221也不在同一軸線上，在第2B圖中可看出每一該上葉片221的第一前緣2211與第一後緣2222分別與前下方的下葉片222的第二後緣2222及後下方的下葉片222的第二前緣2221沒有相重疊一起。在其他實施例，每一該上葉片221的第一前緣2211與面對前下方的該下葉片222的該第二後緣2222可在同一軸線上，每一該上葉片221的該第一後緣2212與對應後下方的該下葉片222的該第二前緣2221可在同一軸線上。所以一軸向的流體(氣流4)被該扇葉結構2的複數上葉片221的第一前緣2211導引進入後，該複數上葉片221會對氣流4進行加壓且沿各自第一迎風面2213朝該第一後緣2212方向在一定速度下向下甩出(流出)後，使後面下方的下葉片222的第二前緣2221會接住前面上葉片221甩出經加壓後的氣流4，接著該後面下方的下葉片222會對氣流4再一次加壓且沿各自第二迎風面2223朝第二後緣2222方向在一定速度下向上甩出(流出)後，再由後面上方的上葉片221的第一前緣2211接著前面下葉片222甩出經加壓後的氣流4並對氣流4又一次加壓，使氣流4不斷在該複數上、下葉片221、222之間以上、下、上、下方式不斷接力持續加壓(如第2C圖)，因此使得可有效對氣流4(流體) 在該複數上、下葉片221、222之間的範圍內不斷持續增壓(加壓)及提升流量的效果。所以透過本發明此扇葉結構2的設計，不僅可有效減少葉片的數量，且在製造上模具也容易開模及扇葉結構2容易製造，相對地能有效降低成本。請參閱第3圖為本發明之第二實施例之離心風扇的立體分解示意圖；第4A圖為本發明之第二實施例之離心風扇的立體組合示意圖；第4B圖為本發明之第二實施例之離心風扇之氣流於該複數上、下葉片之間流動態樣示意圖；第5圖為本發明風扇的扇葉結構與習知離心風扇的扇葉結構實測曲線比較示意圖，並輔以參閱第2A、2C圖，本實施例主要是將前述第一實施例的扇葉結構2應用於一風扇3(如離心風扇或鼓風機)，在本實施例中該扇葉結構2是裝設於該風扇3（如離心風扇）內用以驅動氣流4。該風扇3包含一底座32與一上板31，該上板31具有一入風口33係用以供外面氣流4(流體)流入該風扇3內，該上板31係蓋合在該底座32上構成一扇框，且該上板31與底座32共同界定一容設空間35，該容設空間35係容設該扇葉結構2，一軸心36的一端固定在該輪轂21，該軸心36的另一端與該底座32凸伸的一軸筒322相樞設，並該底座32上設有一出風口34與一沿該底座32外周緣圍繞向上延伸的側板321，該出風口34係設於該底座32的側邊且連通該容設空間35，且於該容設空間35的該複數上、下葉片221、222的一外側端2215、2225與該側板321內表面之間界定一氣流通道38係連通該出風口34。於本發明實際實施時，該扇葉結構2的該輪轂21內側設有一磁性件(圖中未示)係與對應該軸筒322外周側上套設的一定子37相感應激磁。參閱第2A、4B、5圖，當該風扇3的該扇葉結構2沿逆時針旋轉時，該上板31的入風口33會將外面的氣流4導引入該容設空間35內，使氣流4會被該複數上葉片221的第一前緣2211導引進入後，該複數上葉片221會對氣流4加壓而由該第一後緣2212流出(甩出)，使後面下方的下葉片222的第二前緣2221會接住前面上葉片221甩出經加壓的氣流4，讓大部分的氣流4不斷在該等上、下葉片221、222之間以上、下、上、下方式不斷接力持續加壓(如第4B圖)，然後該複數上、下葉片221、222的外側端2215、2225外圍的氣流脫離了加壓範圍而被推出，並沿該側板321內表面朝徑向的該出風口34外流出(朝低壓流出)，同時位於該氣流通道38內的少許氣流4也一併沿該側板321內表面朝出風口34外流出。在第5圖中，係為本發明風扇的扇葉結構2與習知離心風扇的扇葉結構15實測曲線比較示意圖，圖中橫向座標(CFM)代表的是風量與縱向座標(mmAq)代表的是風壓(靜壓)，且本發明為實線表示，習知為虛線表示，所以根據實驗結果顯示，在尺寸比例相同且使用相同的扇框的前提下，本發明風扇3與習知離心風扇在相同風量下，本發明具有較高的風壓，在相同風壓下，本發明具有較大的風量。由此可知，本發明風扇3確實能夠有效提升風扇3性能及降低噪音。因此藉由本發明該風扇3的設計，讓氣流4(流體)於該複數上、下葉片221、222之間範圍內不斷持續加壓，以有效提升風扇3的風壓及風量，又由於只有少許氣流4會流出撞擊到該側板321內表面而於該氣流通道38內，相對地使該風扇3運轉時整體能達到降低噪音、降低震動及減少風扇馬達耗電的效果，且還能有效達到降低成本及利於製造上模具好開模。此外，本發明該扇葉結構2的該複數上、下葉片221、222的第一、二迎風面2213、2223推動氣流方向以與入風口33軸向進入氣流方向是呈傾斜角度(呈非垂直角度)，使得非垂直的流場可達到不易發散。 The above-mentioned objects and structural and functional characteristics of the present invention will be described based on the preferred embodiments of the accompanying drawings. The present invention provides a fan blade structure. Please refer to Fig. 2A for a three-dimensional schematic diagram of the fan blade structure according to the first embodiment of the present invention; Fig. 2B is a schematic side view of Fig. 2A of the present invention; A schematic diagram of the flow pattern of the air flow between the plurality of upper and lower blades in an embodiment. As shown in the figure, the fan blade structure 2 includes a hub 21 and a blade set 22. The hub 21 has a top wall 211 and a side wall 212 extending from the periphery of the top wall 211. The side wall 212 is provided with an upper half 2121. And the lower half 2122. In this embodiment, the center point between the top end of the side wall 212 adjacent to the outer periphery of the hub 21 and the bottom end is the boundary point between the upper half 2121 and the lower half 2122, that is The top half of the side wall 212 to the aforementioned center point is the upper half 2121, and the bottom half 2122 from the center point to the bottom end of the side wall 212, but it is not limited to this. The blade set 22 has a plurality of upper blades 221 and a plurality of lower blades 222. The plurality of upper and lower blades 221, 222 are alternately arranged on the side wall 212 in an upward and downward manner. In this embodiment, the plurality of upper blades 221 and the plurality of lower blades The blades 222 are alternately arranged on the upper half 2121 and the lower half 2122, and the plurality of upper and lower blades 221, 222 and the center line O of the hub 21 are arranged at an oblique angle. For example, each upper blade 221 is arranged at an oblique angle. It is arranged on the upper half 2121 at an inclination angle of 30 degrees to 70 degrees, the angle is preferably 35 degrees to 50 degrees, and each of the lower blades 222 is arranged on the lower half 2122 at an inclination angle of 110 degrees to 155 degrees, The angle is preferably 120 degrees to 140 degrees. The upper and lower blades 221, 222 and the hub 21 are integrally formed, such as plastic injection or 3D printing. Of course, in another embodiment, the plurality of upper and lower blades 221, 222 and the hub 21 can be partially integrally formed and partially non-integrally formed. For example, the plurality of upper and lower blades 221 (or lower blades 222) are injection-molded on the hub. The upper half 2121 (or lower half 2122) of the side wall 212 of 21, the plurality of lower blades 222 (or upper blades 221) are joined to the lower half of the side wall 212 of the hub 21 by means of, for example, gluing, embedding or welding. Part 2122 (or upper half 2121), or an inner end 2226 (or 2216) of the lower blades 222 (or upper blades 221) facing the hub 21 with a hollow sleeve ring so as to be sleeved in the The lower half 2122 (or upper half 2121) of the side wall 212 of the hub 21 is integrated into one body. In another embodiment, the plurality of upper and lower blades 221, 222 and the hub 21 may be non-integrally formed. For example, the plurality of upper and lower blades 221, 222 are bonded to the The upper half 2121 and the lower half 2122 of the side wall 212 of the hub 21. Each of the upper blades 221 is provided with a first front edge 2211 and a first rear edge 2212 adjacent to the top wall 211. The first rear edge 2212 extends from the first front edge 2211 along the length direction of the upper blade 221. It extends downward and defines a first windward surface 2213 and a first leeward surface 2214 corresponding to the first windward surface 2213. The first windward surface 2213 and the first leeward surface 2214 are respectively disposed on both sides of the upper blade 221 During the operation of the fan structure 2 (such as counterclockwise rotation), one side (front side) of the fan structure 2 facing the direction of rotation is the first windward surface 2213, and the other side (rear side) is the first windward surface 2213. A leeward surface 2214, and the first windward surface 2213 is located in front of the first leeward surface 2214, and in this embodiment, the first windward surface 2213 and the first leeward surface 2214 are respectively concave curved surfaces and convex curved surfaces. The overall shape of the upper blades 221 is an arch shape, and the thickness of each upper blade 221 changes from thicker to thinner along the extension direction like an arch, but it is not limited. Each lower blade 222 has a second front edge 2221 adjacent to the bottom end of the side wall 212 and a second rear edge 2222. The second rear edge 2222 extends from the second front edge 2221 upward along the length of the lower blade 222. Extending obliquely and jointly define a second windward surface 2223 and a second leeward surface 2224 corresponding to the second windward surface 2223, the second windward surface 2223 and the second leeward surface 2224 are respectively disposed on both sides of the lower blade 222, In this embodiment, the structure and shape (for example, arched) of the plurality of lower blades 222 are the same as the structure and shape (for example, arched) of the upper blade 221, which will not be repeated here. The upper and lower blades 221, The difference of 222 is that the first windward surface 2213 of each upper blade 221 faces downward and is arranged in the direction corresponding to the second trailing edge 2222 of the lower blade 222, and the second windward surface 2223 of each lower blade 222 faces upwardly. It should be set in the direction of the first trailing edge 2212 of the upper blade 221, that is, as shown in Figures 2A and 2B. Two trailing edges 2222 are arranged in the upper half 2121, and the second windward surface 2223 of the lower front and lower blades 222 is arranged in the lower half 2122 in the direction of the first trailing edge 2212 of the upper blade 221 facing forward and diagonally upward. And the first windward surface 2213 and the second windward surface 2223 of the plurality of upper and lower blades 221, 222 are not facing each other and have different orientations. The first leeward surface 2214 and the second leeward surface 2224 are also different. The same orientation. In a possible embodiment, the shape of the upper blade 221 and the shape of the lower blade 222 may be the same or different. For example, the shape of the upper blade 221 may also be arc-shaped (or arched), and the upper blade The first windward surface 2213 and the first leeward surface 2214 of the 221 are respectively concave arc surfaces and convex arc surfaces. The shape of the lower blade 222 may also be arcuate (or arc), and the second surface of the lower blade 222 The windward surface 2223 and the second leeward surface 2224 are respectively concave and convex, or the upper and lower blades 221 and 222 are the same in shape and are arc-shaped (or arched). In this embodiment, the thickness of the first front edge 2211 of each upper blade 221 is greater than the thickness of the first rear edge 2212, and the thickness of the second front edge 2221 of each lower blade 222 is greater than that of the two rear edges Thickness, and the first front edge 2211 of each upper blade 221 and the second rear edge 2222 of the lower blade 222 facing forward and downward are not on the same axis. The first rear edge 2212 of each upper blade 221 It is not on the same axis as the second front edge 2221 of the lower blade 222 corresponding to the lower rear. In Figure 2B, it can be seen that the first front edge 2211 and the first rear edge 2222 of each upper blade 221 are respectively opposite to the front and lower sides. The second rear edge 2222 of the lower blade 222 and the second front edge 2221 of the lower rear blade 222 do not overlap. In other embodiments, the first front edge 2211 of each upper blade 221 and the second rear edge 2222 of the lower blade 222 facing forward and downward may be on the same axis, and the first edge of each upper blade 221 The rear edge 2212 and the second front edge 2221 of the lower blade 222 corresponding to the rear and lower sides may be on the same axis. Therefore, after an axial fluid (air flow 4) is guided by the first leading edge 2211 of the plurality of upper blades 221 of the fan blade structure 2, the plurality of upper blades 221 will pressurize the air flow 4 and move along the respective first windward edges. After the surface 2213 is thrown downwards (outflow) at a certain speed in the direction of the first trailing edge 2212, the second leading edge 2221 of the lower blade 222 below the rear will catch the upper blade 221 in front of it and throw out the pressurized The air flow 4, and then the lower blades 222 below the rear face will pressurize the air flow 4 again and will be thrown upwards (outflow) at a certain speed along the respective second windward face 2223 toward the second rear edge 2222, and then from the upper rear The first leading edge 2211 of the upper blade 221 of the lower blade 222 then throws out the pressurized air flow 4 and pressurizes the air flow 4 again, so that the air flow 4 is continuously above the plurality of upper and lower blades 221, 222 , Down, Up and Down methods continue to continuously pressurize (as shown in Figure 2C), so that the airflow 4 (fluid) can be effectively continuously pressurized (plus Pressure) and the effect of increasing the flow rate. Therefore, through the design of the fan blade structure 2 of the present invention, not only the number of blades can be effectively reduced, but also the mold is easy to open and the fan blade structure 2 is easy to manufacture, which can effectively reduce the cost. Please refer to Figure 3 for a perspective exploded view of the centrifugal fan of the second embodiment of the present invention; Figure 4A is a perspective view of the centrifugal fan assembly of the second embodiment of the present invention; Figure 4B is the second implementation of the present invention For example, the airflow of the centrifugal fan flows between the plurality of upper and lower blades; Figure 5 is a schematic diagram of the comparison of the fan blade structure of the fan of the present invention and the actual measured curve of the fan blade structure of the conventional centrifugal fan. 2A and 2C, this embodiment mainly applies the fan structure 2 of the first embodiment to a fan 3 (such as a centrifugal fan or a blower). In this embodiment, the fan structure 2 is installed on the fan 3 (such as a centrifugal fan) to drive the airflow 4. The fan 3 includes a base 32 and an upper plate 31. The upper plate 31 has an air inlet 33 for the outside air 4 (fluid) to flow into the fan 3, and the upper plate 31 is covered on the base 32 A fan frame is formed, and the upper plate 31 and the base 32 jointly define an accommodating space 35, the accommodating space 35 accommodating the fan blade structure 2, one end of an axis 36 is fixed to the hub 21, the axis The other end of 36 is pivoted with a shaft tube 322 protruding from the base 32, and the base 32 is provided with an air outlet 34 and a side plate 321 extending upward along the outer periphery of the base 32. The air outlet 34 is attached to The side of the base 32 communicates with the accommodating space 35, and an air flow channel is defined between an outer end 2215, 2225 of the plurality of upper and lower blades 221, 222 of the accommodating space 35 and the inner surface of the side plate 321 38 is connected to the air outlet 34. In the actual implementation of the present invention, a magnetic member (not shown in the figure) is provided on the inner side of the hub 21 of the fan blade structure 2 to induce magnetism with the stator 37 sheathed on the outer peripheral side of the corresponding shaft cylinder 322. Referring to Figures 2A, 4B, and 5, when the fan blade structure 2 of the fan 3 rotates counterclockwise, the air inlet 33 of the upper plate 31 will guide the outside airflow 4 into the accommodating space 35, so that After the air flow 4 is guided and entered by the first front edge 2211 of the upper blades 221, the upper blades 221 pressurize the air flow 4 and flow out (throw out) from the first rear edge 2212, so that the lower rear edge The second front edge 2221 of the blade 222 will catch the upper blade 221 in front of it and throw out the pressurized air flow 4, so that most of the air flow 4 is continuously up, down, up and down between the upper and lower blades 221 and 222. Continuously relay and pressurize continuously (as shown in Figure 4B), and then the airflow around the outer ends 2215, 2225 of the plurality of upper and lower blades 221, 222 is pushed out of the pressurized range and is pushed out along the inner surface of the side plate 321. At the same time, a small amount of air flow 4 located in the air flow channel 38 also flows out of the air outlet 34 along the inner surface of the side plate 321. In Figure 5, it is a schematic diagram showing the comparison of measured curves between the fan blade structure 2 of the fan of the present invention and the fan blade structure 15 of the conventional centrifugal fan. The horizontal coordinate (CFM) in the figure represents the air volume and the longitudinal coordinate (mmAq). It is the wind pressure (static pressure), and the present invention is represented by a solid line, and the conventional is represented by a dotted line. Therefore, according to the experimental results, the fan 3 of the present invention is centrifugal with the conventional centrifugal fan under the premise that the same size ratio and the same fan frame are used. Under the same air volume, the present invention has a higher wind pressure, and under the same air pressure, the present invention has a larger air volume. It can be seen from this that the fan 3 of the present invention can indeed effectively improve the performance of the fan 3 and reduce noise. Therefore, through the design of the fan 3 of the present invention, the airflow 4 (fluid) is continuously pressurized within the range between the plurality of upper and lower blades 221 and 222, so as to effectively increase the air pressure and air volume of the fan 3. The air flow 4 will flow out and hit the inner surface of the side plate 321 and be in the air flow channel 38. When the fan 3 is running, the overall effect of reducing noise, reducing vibration and reducing the power consumption of the fan motor can be achieved, and it can also effectively reduce Cost and good for manufacturing the upper mold and opening the mold. In addition, the first and second windward surfaces 2213, 2223 of the plurality of upper and lower blades 221, 222 of the fan blade structure 2 of the present invention push the airflow direction to be at an oblique angle (non-perpendicular to the axial direction of the air inlet 33). Angle), so that the non-vertical flow field can be achieved and is not easy to diverge.

2:扇葉結構 21:輪轂 211:頂壁 212:側壁 2121、2122:上、下半部 22:葉片組 221、222:上、下葉片 2211、2221:第一、二前緣 2212、2222:第一、二後緣 2213、2223:第一、二迎風面 2214、2224:第一、二背風面 2215、2225:外側端 2216、2226:內側端 3:風扇 31:上板 32:底座 321:側板 322:軸筒 33:入風口 34:出風口 35:容設空間 36:軸心 37:定子 38:氣流通道 4:氣流 O:中心線2: Fan blade structure 21: Wheel hub 211: top wall 212: Sidewall 2121, 2122: upper and lower half 22: Blade group 221, 222: upper and lower blades 2211, 2221: the first and second leading edges 2212, 2222: first and second trailing edges 2213, 2223: the first and second windward sides 2214, 2224: the first and second leeward sides 2215, 2225: outer end 2216, 2226: inner end 3: fan 31: upper board 32: base 321: Side Panel 322: Axle Tube 33: Air inlet 34: air outlet 35: accommodation space 36: Axis 37: Stator 38: Airflow channel 4: airflow O: Centerline

第1A圖為習知之離心風扇之立體分解示意圖。第1B圖為習知之離心風扇之氣流流動態樣示意圖。第2A圖為本發明之第一實施例之扇葉結構立體示意圖。第2B圖為本發明圖2A的側視示意圖。第2C圖為本發明之第一實施例之氣流於該複數上、下葉片之間流動態樣示意圖。第3圖為本發明之第二實施例之離心風扇的立體分解示意圖。第4A圖為本發明之第二實施例之離心風扇的立體組合示意圖。第4B圖為本發明之第二實施例之離心風扇之氣流於該複數上、下葉片之間流動態樣示意圖。第5圖為本發明風扇的扇葉結構與習知離心風扇的扇葉結構實測曲線比較示意圖。 Figure 1A is a three-dimensional exploded schematic view of a conventional centrifugal fan. Figure 1B is a schematic diagram of the air flow of a conventional centrifugal fan. Fig. 2A is a three-dimensional schematic diagram of the fan blade structure according to the first embodiment of the present invention. Fig. 2B is a schematic side view of Fig. 2A of the present invention. Figure 2C is a schematic diagram of the flow pattern of the air flow between the plurality of upper and lower blades according to the first embodiment of the present invention. Figure 3 is a three-dimensional exploded schematic view of the centrifugal fan according to the second embodiment of the present invention. Fig. 4A is a perspective view of the centrifugal fan assembly according to the second embodiment of the present invention. Fig. 4B is a schematic diagram of the air flow between the upper and lower blades of the centrifugal fan according to the second embodiment of the present invention. FIG. 5 is a schematic diagram showing the comparison of the measured curves between the blade structure of the fan of the present invention and the blade structure of the conventional centrifugal fan.

2:扇葉結構 2: Fan blade structure

21:輪轂 21: Wheel hub

211:頂壁 211: top wall

212:側壁 212: Sidewall

2121、2122:上、下半部 2121, 2122: upper and lower half

22:葉片組 22: Blade group

221、222:上、下葉片 221, 222: upper and lower blades

2211、2221:第一、二前緣 2211, 2221: the first and second leading edges

2212、2222:第一、二後緣 2212, 2222: first and second trailing edges

2213、2223:第一、二迎風面 2213, 2223: the first and second windward sides

2214、2224:第一、二背風面 2214, 2224: the first and second leeward sides

2215、2225:外側端 2215, 2225: outer end

2216、2226:內側端 2216, 2226: inner end

Claims

一種扇葉結構，包括：一輪轂，具有一頂壁及一自該頂壁周緣延伸的側壁；一葉片組，具有複數上葉片與複數下葉片，該複數上、下葉片係呈上、下交錯設在該側壁，每一該上葉片設有一第一前緣與一第一後緣係自該第一前緣沿該上葉片長度方向向下斜伸且共同界定一第一迎風面，該每一該下葉片設有一第二前緣與一第二後緣係自該第二前緣沿該下葉片長度方向向上斜伸且共同界定一第二迎風面；及其中該第一迎風面是面朝下方該下葉片的第二後緣方向設置，該第二迎風面是面朝上方該上葉片的第一後緣方向設置。 A fan blade structure, including: A hub having a top wall and a side wall extending from the periphery of the top wall; A blade set has a plurality of upper blades and a plurality of lower blades. The plurality of upper and lower blades are alternately arranged on the side wall in an upward and downward manner. Each of the upper blades is provided with a first leading edge and a first trailing edge from the The first front edge extends downward along the length of the upper blade and jointly defines a first windward surface. Each of the lower blades is provided with a second front edge and a second rear edge connected from the second front edge along the The length direction of the lower blades is inclined upward and jointly defines a second windward surface; and Wherein, the first windward surface is set facing downward in the direction of the second trailing edge of the lower blade, and the second windward surface is set facing upward in the direction of the first trailing edge of the upper blade.

如請求項1所述之扇葉結構，其中該側壁設有一上半部及一下半部，該複數上葉片與該複數下葉片係交錯設在該上半部與該下半部。The fan blade structure according to claim 1, wherein the side wall is provided with an upper half and a lower half, and the plurality of upper blades and the plurality of lower blades are alternately arranged on the upper half and the lower half.

如請求項1所述之扇葉結構，其中該第一後緣係自該第一前緣沿該上葉片長度方向向下斜伸且共同界定一第一背風面係對應該第一迎風面，該第二後緣係自該第二前緣沿該下葉片長度方向向上斜伸且共同界定一第二背風面係對應該第二迎風面，該第一背風面與該第二背風面為呈不相同朝向，該第一迎風面與該第二迎風面為呈不相同朝向，且該第二迎風面係與第一迎風面不相面對。The fan blade structure according to claim 1, wherein the first trailing edge extends diagonally downward from the first front edge along the length of the upper blade and jointly defines a first leeward surface corresponding to the first windward surface, The second trailing edge extends diagonally upward from the second front edge along the length of the lower blade and jointly defines a second leeward surface corresponding to the second windward surface. The first leeward surface and the second leeward surface are in a shape Different directions, the first windward surface and the second windward surface are in different directions, and the second windward surface does not face the first windward surface.

如請求項1所述之扇葉結構，其中該複數上葉片其中任一上葉片的該第一前緣與面對前下方的該下葉片的該第二後緣不在同一軸線上或在同一軸線上，該其中任一上葉片的該第一後緣與對應後下方的該下葉片的該第二前緣不在同一軸線上或在同一軸線上。The fan blade structure according to claim 1, wherein the first leading edge of any one of the upper blades and the second trailing edge of the lower blade facing the front and bottom are not on the same axis or on the same axis On the line, the first trailing edge of any one of the upper blades and the second leading edge of the lower blade corresponding to the lower rear are not on the same axis or on the same axis.

如請求項1所述之扇葉結構，其中該複數上、下葉片呈拱形狀或弧狀。The fan blade structure according to claim 1, wherein the plurality of upper and lower blades are arched or arc-shaped.

如請求項1所述之扇葉結構，其中該複數上、下葉片與該輪轂為一體成型或非一體成型。The fan blade structure according to claim 1, wherein the plurality of upper and lower blades and the hub are integrally formed or not integrally formed.

如請求項1所述之扇葉結構，係應用一離心風扇，該離心風扇包含一底座與一具有一入風口的上板，該上板係蓋合在該底座上且共同界定一容設空間係容設該扇葉結構，一軸心的一端固定在該輪轂，該軸心的另一端與該底座凸伸的一軸筒相樞設，並該底座的側邊上設有一出風口係連通該容設空間。The fan blade structure described in claim 1 uses a centrifugal fan. The centrifugal fan includes a base and an upper plate with an air inlet. The upper plate covers the base and defines an accommodating space. The fan blade structure is accommodated, one end of a shaft center is fixed to the hub, the other end of the shaft center is pivoted with a shaft tube protruding from the base, and an air outlet is provided on the side of the base to communicate with the hub. To accommodate space.