TWI548815B - Fan - Google Patents
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- TWI548815B TWI548815B TW100133090A TW100133090A TWI548815B TW I548815 B TWI548815 B TW I548815B TW 100133090 A TW100133090 A TW 100133090A TW 100133090 A TW100133090 A TW 100133090A TW I548815 B TWI548815 B TW I548815B
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Description
本發明涉及一種用於給電子元件散熱的風扇。 The invention relates to a fan for dissipating heat from an electronic component.
隨著電子技術的飛速發展,中央處理器等發熱電子元件運行速度越來越快,其運行時產生的熱量亦相應增加,為了將這些熱量散發出去以保障電子元件的正常運行,業界採用風扇對電子元件進行散熱。 With the rapid development of electronic technology, the heat-generating electronic components such as the central processing unit are running faster and faster, and the heat generated during operation is correspondingly increased. In order to dissipate the heat to ensure the normal operation of the electronic components, the industry adopts a fan pair. The electronic components dissipate heat.
傳統的風扇一般包括一個扇框以及收容於扇框內的一個葉輪。該葉輪包括一個位於中心的輪轂及自該輪轂周圍延伸的複數個扇葉。風扇工作時,其出風口的氣流分佈不平均,氣流在經過該扇框的開口邊緣時,由於力矩的作用,出風口的氣流快速地往外旋流擴散,導致越靠近風扇外圍氣流分佈越集中,越靠近風扇中心氣流分佈越少,風扇的輪轂附近因為無扇葉甚至會產生無風區,風扇的散熱效率較低。 A conventional fan generally includes a fan frame and an impeller housed in the fan frame. The impeller includes a centrally located hub and a plurality of blades extending from the hub. When the fan is working, the airflow distribution of the air outlet is not uniform. When the airflow passes through the edge of the opening of the fan frame, the airflow of the air outlet rapidly spreads out due to the torque, resulting in a more concentrated airflow distribution near the fan. The closer to the center of the fan, the less the airflow is distributed. The fan's hub is near the hub because there is no fan blade or even a windless zone. The fan's heat dissipation efficiency is low.
有鑒於此,有必要提供一種散熱效率較高的風扇。 In view of this, it is necessary to provide a fan with higher heat dissipation efficiency.
一種風扇,包括一個導風罩及一個葉輪,該導風罩的軸向兩端分別形成一入風口及一出風口,該導風罩內於葉輪運行時產生由入風口排向出風口的軸向氣流,該導風罩包括一個外框,該外框的直徑沿著風扇的軸向自靠近葉輪的一側向出風口側逐漸減小。 A fan includes an air guiding hood and an impeller. The axial ends of the air guiding hood respectively form an air inlet and an air outlet. The air hood generates an axis that is discharged from the air inlet to the air outlet when the impeller is running. To the air flow, the air hood includes an outer frame whose diameter gradually decreases from the side close to the impeller to the air outlet side along the axial direction of the fan.
上述風扇產生的一部分氣流在導風罩的引導下改變方向,沿著風扇的軸向流出,提高了風扇的散熱效率。 A part of the airflow generated by the fan changes direction under the guidance of the air hood and flows out along the axial direction of the fan, thereby improving the heat dissipation efficiency of the fan.
100‧‧‧風扇 100‧‧‧fan
10‧‧‧支撐座 10‧‧‧ support
20‧‧‧導風罩 20‧‧‧wind hood
30‧‧‧葉輪 30‧‧‧ Impeller
22‧‧‧本體 22‧‧‧Ontology
24‧‧‧蓋體 24‧‧‧ cover
220‧‧‧外框 220‧‧‧Front frame
222‧‧‧基座 222‧‧‧ Pedestal
224‧‧‧靜葉 224‧‧‧ 静叶
226‧‧‧出風口 226‧‧‧air outlet
240‧‧‧連接部 240‧‧‧Connecting Department
242‧‧‧後蓋 242‧‧‧Back cover
246‧‧‧樞接柱 246‧‧‧ pivot column
244‧‧‧氣孔 244‧‧‧ stomata
12‧‧‧平板 12‧‧‧ tablet
14‧‧‧豎板 14‧‧‧ riser
140‧‧‧樞接孔 140‧‧‧Pivot hole
32‧‧‧輪轂 32‧‧·wheels
34‧‧‧扇葉 34‧‧‧ fan leaves
36‧‧‧轉軸 36‧‧‧ shaft
圖1為本發明風扇一個實施例的組裝示意圖。 1 is an assembled view of an embodiment of a fan of the present invention.
圖2為圖1中的風扇的分解圖。 Figure 2 is an exploded view of the fan of Figure 1.
圖3為圖1中的風扇沿IV-IV線的剖視圖。 Figure 3 is a cross-sectional view of the fan of Figure 1 taken along line IV-IV.
圖4為圖1中的風扇背面的示意圖。 4 is a schematic view of the back of the fan of FIG. 1.
請參閱圖1,本發明的一個實施例的風扇100包括一個支撐座10、與該支撐座10連接的一個導風罩20及容置於該導風罩20內的一個葉輪30。 Referring to FIG. 1 , a fan 100 according to an embodiment of the present invention includes a support base 10 , an air hood 20 connected to the support base 10 , and an impeller 30 housed in the air hood 20 .
請同時參閱圖2及圖3,該導風罩20包括一個本體22及與該本體22連接的一個蓋體24。該本體22包括一個外框220、位於該外框220中心的一個柱狀的基座222及自該基座222外圍延伸且與該外框220連接的複數個螺旋狀靜葉224。該外框220外側的開口構成導風罩20的出風口226。該外框220沿著風扇100的中心軸線AA’延伸的長度等於基座222沿著中心軸線AA’延伸的長度。 Referring to FIG. 2 and FIG. 3 simultaneously, the air hood 20 includes a body 22 and a cover 24 connected to the body 22. The body 22 includes an outer frame 220, a columnar base 222 located at the center of the outer frame 220, and a plurality of spiral vanes 224 extending from the periphery of the base 222 and connected to the outer frame 220. The opening on the outer side of the outer frame 220 constitutes the air outlet 226 of the air hood 20. The length of the outer frame 220 extending along the central axis AA' of the fan 100 is equal to the length of the base 222 extending along the central axis AA'.
該外框220的內徑及外徑沿著風扇100的中心軸線AA’的方向,自靠近葉輪30的一側向遠離葉輪30的一側(即靠近出風口226的一側)逐漸減小,形成一個由內到外漸縮的結構,使風扇100所產生的外框220附近的氣流在外框220內壁的引導下自基本平行於中心軸線AA’的方向被改變為朝向風扇100的中心軸線AA’的方向流出,也就是說在外框220內壁的作用下的氣流被改變後的流向 與中心軸線AA’之間成一夾角。 The inner diameter and the outer diameter of the outer frame 220 gradually decrease from a side close to the impeller 30 toward a side away from the impeller 30 (ie, a side close to the air outlet 226) along a direction of the central axis AA' of the fan 100. Forming a structure that is tapered from the inside to the outside, so that the airflow near the outer frame 220 generated by the fan 100 is changed from a direction substantially parallel to the central axis AA' toward the central axis of the fan 100 under the guidance of the inner wall of the outer frame 220. The direction of AA' flows out, that is, the flow direction after the airflow under the action of the inner wall of the outer frame 220 is changed. An angle is formed with the central axis AA'.
在本實施例中,該基座222沿著中心軸線AA’的方向分為兩個部分,該基座222靠近出風口226的部分的直徑沿著中心軸線AA’的方向,自更靠近葉輪30的一側向出風口226側逐漸減小,使一部分沿著基座222表面流動的氣流在基座222的引導下改變方向以朝向風扇100的中心軸線AA’的方向流出。該基座222靠近葉輪30的部分的直徑沿著中心軸線AA’的方向,自靠近葉輪30的一側向遠離葉輪30的一側逐漸增大,以利於氣流沿著基座222表面朝向出風口226側流動。 In the present embodiment, the base 222 is divided into two parts along the direction of the central axis AA', and the diameter of the portion of the base 222 near the air outlet 226 is along the direction of the central axis AA', from closer to the impeller 30. One side gradually decreases toward the air outlet 226 side, so that a part of the airflow flowing along the surface of the base 222 is redirected under the guidance of the base 222 to flow out toward the central axis AA' of the fan 100. The diameter of the portion of the base 222 near the impeller 30 is gradually increased from the side close to the impeller 30 toward the side away from the impeller 30 in the direction of the central axis AA' to facilitate the airflow along the surface of the base 222 toward the air outlet. 226 side flow.
優選地,該基座222靠近出風口226的部分的直徑自更靠近葉輪30的一側向出風口226側逐漸減小。當然,該基座222靠近葉輪30的部分的直徑自靠近葉輪30的一側向遠離葉輪30的一側變化的趨勢亦可以係逐漸減小或者保持不變。 Preferably, the diameter of the portion of the base 222 near the air outlet 226 gradually decreases from the side closer to the impeller 30 toward the side of the air outlet 226. Of course, the tendency of the diameter of the portion of the base 222 near the impeller 30 to change from the side close to the impeller 30 to the side away from the impeller 30 may also be gradually reduced or left unchanged.
請同時參閱圖4,該蓋體24包括一個圓筒狀的連接部240及與葉輪30相對的一個後蓋242。該葉輪30容置於該導風罩20內對應該連接部240的位置。該連接部240的直徑沿著中心軸線AA’的方向,自靠近後蓋242的一側向遠離後蓋242的一側保持不變。該連接部240的外表面相對兩側向外凸伸出兩個樞接柱246。該後蓋242的內、外表面大致為半球面。該後蓋242開設複數個呈同心圓排佈的氣孔244,構成導風罩20的入風口。 Referring to FIG. 4 at the same time, the cover body 24 includes a cylindrical connecting portion 240 and a rear cover 242 opposite to the impeller 30. The impeller 30 is housed in the air hood 20 at a position corresponding to the connecting portion 240. The diameter of the connecting portion 240 is constant along the direction of the central axis AA' from the side close to the rear cover 242 toward the side away from the rear cover 242. The outer surface of the connecting portion 240 protrudes outwardly from the two sides to protrude from the two pivot posts 246. The inner and outer surfaces of the rear cover 242 are substantially hemispherical. The rear cover 242 defines a plurality of air holes 244 arranged in a concentric circle to form an air inlet of the air guiding cover 20.
該支撐座10包括一個矩形的平板12及自該平板12兩端緣垂直向上延伸的兩個豎板14。每個豎板14開設一個圓形的樞接孔140。該導風罩20的兩個樞接柱246容置於該支撐座10的樞接孔140,使導風罩20與支撐座10樞接配合並且可以相對於支撐座10旋轉。 The support base 10 includes a rectangular flat plate 12 and two risers 14 extending vertically upward from opposite end edges of the flat plate 12. Each of the risers 14 defines a circular pivot hole 140. The two pivoting posts 246 of the air guiding cover 20 are received in the pivoting holes 140 of the supporting base 10, so that the air guiding cover 20 is pivotally engaged with the supporting base 10 and can be rotated relative to the supporting base 10.
該葉輪30包括一個輪轂32、自該輪轂32外圍延伸的複數個扇葉34及固定於該輪轂32中央的一個轉軸36。該轉軸36可旋轉地固定在該導風罩20的基座222中央。 The impeller 30 includes a hub 32, a plurality of blades 34 extending from the periphery of the hub 32, and a shaft 36 secured to the center of the hub 32. The shaft 36 is rotatably fixed to the center of the base 222 of the air hood 20.
風扇100工作時,葉輪30高速旋轉藉由該導風罩20的氣孔244從外界吸入氣流,氣流在導風罩20內流動。由於該外框220沿著風扇100的中心軸線AA’的方向由內向外漸縮,沿著外框220內壁流動的氣流在外框220內壁的引導下,改變方向朝向風扇100的中心軸線AA’的方向流出。沿著導風罩20的靜葉224流動的一部分氣流在靜葉224的引導下朝向中心軸線AA’的方向流出。風扇100流出的氣流的一部分會集中在風扇100出風口226外側中心軸線AA’附近,氣流從風扇100外圍到中心分佈更加均勻,提高了風扇100的散熱效率。 When the fan 100 is in operation, the impeller 30 rotates at a high speed, and the airflow 244 of the air hood 20 draws airflow from the outside, and the airflow flows in the air hood 20. Since the outer frame 220 is tapered from the inner side outward in the direction of the central axis AA' of the fan 100, the air flow flowing along the inner wall of the outer frame 220 is guided by the inner wall of the outer frame 220, and the direction is changed toward the central axis AA of the fan 100. 'The direction flows out. A portion of the airflow flowing along the vane 224 of the air duct 20 flows out in the direction of the central axis AA' under the guidance of the vane 224. A part of the airflow flowing out of the fan 100 is concentrated near the central axis AA' outside the air outlet 226 of the fan 100, and the airflow is more evenly distributed from the periphery to the center of the fan 100, thereby improving the heat dissipation efficiency of the fan 100.
由於該基座222靠近出風口226的部分的直徑自更靠近葉輪30的一側向出風口226側逐漸減小一部分沿著基座222表面流動的氣流在基座222的引導下,改變方向朝向風扇100的中心軸線AA’的方向流出。如此,可進一步將風扇100流出的部分氣流集中在風扇100出風口226外側中心軸線AA’附近,以進一步提高氣流的均勻度與風扇100的散熱效率。 Since the diameter of the portion of the base 222 near the air outlet 226 gradually decreases from the side closer to the impeller 30 toward the air outlet 226 side, a part of the airflow flowing along the surface of the base 222 is guided by the base 222, and the direction is changed. The direction of the center axis AA' of the fan 100 flows out. In this way, part of the airflow flowing out of the fan 100 can be further concentrated near the center axis AA' outside the air outlet 226 of the fan 100 to further improve the uniformity of the airflow and the heat dissipation efficiency of the fan 100.
綜上所述,本發明符合發明專利要件,爰依法提出專利申請。惟,以上所述者僅為本發明之較佳實施例,舉凡熟悉本案技藝之人士,在爰依本發明精神所作之等效修飾或變化,皆應涵蓋於以下之申請專利範圍內。 In summary, the present invention complies with the requirements of the invention patent and submits a patent application according to law. The above description is only the preferred embodiment of the present invention, and equivalent modifications or variations made by those skilled in the art will be included in the following claims.
100‧‧‧風扇 100‧‧‧fan
10‧‧‧支撐座 10‧‧‧ support
20‧‧‧導風罩 20‧‧‧wind hood
30‧‧‧葉輪 30‧‧‧ Impeller
Claims (7)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
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TW100133090A TWI548815B (en) | 2011-09-14 | 2011-09-14 | Fan |
Applications Claiming Priority (1)
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TW100133090A TWI548815B (en) | 2011-09-14 | 2011-09-14 | Fan |
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TW201312007A TW201312007A (en) | 2013-03-16 |
TWI548815B true TWI548815B (en) | 2016-09-11 |
Family
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TW100133090A TWI548815B (en) | 2011-09-14 | 2011-09-14 | Fan |
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Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN2258927Y (en) * | 1995-11-08 | 1997-08-06 | 吕学能 | Radial natural wind electric fan |
CN100376806C (en) * | 2004-12-25 | 2008-03-26 | 富准精密工业(深圳)有限公司 | Blast deflector of fan |
CN101560988A (en) * | 2009-05-03 | 2009-10-21 | 邓仲雯 | Multidirectional table oscillating fan |
TW201038909A (en) * | 2009-04-22 | 2010-11-01 | liang-he Chen | Inlet-contracted airstream concentrating device for chip heat sink |
US7988407B2 (en) * | 2005-04-28 | 2011-08-02 | Delta Electronics Inc. | Axial fan |
-
2011
- 2011-09-14 TW TW100133090A patent/TWI548815B/en not_active IP Right Cessation
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN2258927Y (en) * | 1995-11-08 | 1997-08-06 | 吕学能 | Radial natural wind electric fan |
CN100376806C (en) * | 2004-12-25 | 2008-03-26 | 富准精密工业(深圳)有限公司 | Blast deflector of fan |
US7988407B2 (en) * | 2005-04-28 | 2011-08-02 | Delta Electronics Inc. | Axial fan |
TW201038909A (en) * | 2009-04-22 | 2010-11-01 | liang-he Chen | Inlet-contracted airstream concentrating device for chip heat sink |
CN101560988A (en) * | 2009-05-03 | 2009-10-21 | 邓仲雯 | Multidirectional table oscillating fan |
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TW201312007A (en) | 2013-03-16 |
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