201122231 六、發明說明： 【發明所屬之技術領域】 本發明是有關於一種散熱風扇’特別是指一種具降低 噪音效果的散熱風扇。 【先前技術】 參閱圖1、2’現有散熱風扇1包括一轴管u、一間隔 環繞該軸管11外周緣的殼座12、多數等角度相間隔地連接 該軸管11與該殼座12的連接桿13，及一轉動地設置於該 軸管11中且具有多數扇葉141的扇輪14，其中，該殼座12 界定有相反的一入風口 121與一出風口 122，利用轉動之該 扇輪14的所述扇葉141將氣流由該入風口 12ι吸入並自該 出風口 122排出以達成散熱的功效。 但隨著科技的發達’近年來電子產品的體積愈來愈小 ’造成所產生的熱量愈來愈不易排除，為此，相關業者皆 積極研發散熱效果更好的散熱風扇1。 一般最為常見改善散熱效果的方法為增加該扇輪丨4的 轉速，藉此增加所吸入與排出之氣流以提高散熱效率，然 而，加快該扇輪14的轉速將會增加該散熱風扇丨運轉時的 耗電量。 為了減少耗電量，同時又能提高散熱效果，相關業者 研發出如圖3所示之中華民國公告第M348864號「改良式 增壓風扇」冑型專利’其改善之處在於：將一靜葉輪15設 置於該殼座12的出風口 122冑，該靜葉輪15具有一安裝 於該殼座U的框體151、一位於該框體15"的固定環 201122231 及多數連接該固疋環152與該框體151的導引部153 利用所述扇葉141與導引部153㈣能產生增壓效果， 提高氣流的流量與流速進而提高散熱效率；但是，加裝靜 葉輪15也會造成整體體積的增加，在產品體積愈來愈小的 趨，下’龐大的體積不但造成安裝空間上的浪費同時也造 、t裝上的不便，而且當氣流經所述扇葉141而通過所述 導引部153 a夺’因為受到所述導引部15"干擾還會產生 較大的噪音（風切聲）。 【發明内容】 因此，本發明之目的，即在提供一種體積較小、散熱 效果好、又兼具增壓及降低噪音等功能之具降低噪音效果 的散熱風扇。 於是，本發明具降低噪音效果的散熱風扇包含一殼座 ，及一樞設於該殼座中的扇輪。 該殼座包括一軸管、一間隔環繞該軸管的外框，及多 數連接該軸管與該外框的連接件；該扇輪包括一枢設於該 軸管的輪轂’及多數自該輪轂向外延伸的扇葉，其中，每 兩相鄰扇葉之間的夾角皆不相同。 本發明之功效在於利用該扇輪上每兩相鄰扇葉之間夾 角皆不相同的設計’使氣流形成擾流而產生增壓效果，同 時有效提高氣流的流速與流量進以提高散熱效果，不但整 體的體積較小’更可利用所述夾角皆不相同的扇葉抑制流 場干擾的嗓音使運轉時能夠更為安靜。 【實施方式】 201122231 有關本發明之前述及其他技術内容、特點與功效，在 以下配合參考圖式之三個較佳實施例的詳細說明中， 清楚的呈現。 在本發明被詳細描述之前，要注意的是’在以下的說 明内容中，類似的元件是以相同的編號來表示。 參閱圖4、5’本發明具降低噪音效果的散熱風扇2之 第一較佳實施例包含-殼座21，及—樞設於該殼座Η中的 扇輪22。 ’ 該殼座21包括—軸管211、一間隔環繞該軸管si〗的 外框212’及多數連接該軸管211與該外框212的連接件 213 該扇輪22包括一樞設於該軸管2ΐι的輪轂a〗，及多 數自該輪毅221向外延伸的扇葉222，其中，每兩相鄰扇葉 222之間的夾角0皆不相同。 ' —當該散熱風扇2的扇輪22轉動時，氣流會依據圖5中 箭頭3 1方向流動，而當氣流流經所述扇葉222時，利用每 兩相鄰扇f 222之間的夾角0皆不相同以擾動氣流，使氣 流形成擾流而產生增壓效果，同時提高氣流的流速與流量 ，因此可以在相同的體積下具有較現有散熱風扇1(顯示於 圖1)更好的散熱效果。 參閱圖4與附件i，發明人經由模擬實驗得知本發明具 :低噪音效果的散熱風扇2 u佳實施例運轉時的嚼 曰僅約25.1 dB(A)[SPL]，❼現有散熱風扇 的平均嗓音值約 為45.9dB(A)[SPL]，所以本發明具降低噪音效果的散熱風 扇2之噪音值較現有散熱風扇的噪音值減少了 2〇.8 201122231 dB(A)[SPL]，足以證明本發明 2運轉時能更為安靜。 之具降低噪音效果的散熱風扇 參閱圖6、7’本發明具降低噪音效果的散熱風扇2之 第二較佳實施例，大致是與該第一較佳實施例相同，不相 同的地方在於：所述連接件213 $呈葉片 相鄰連接件213之間的夾角…相同。為方便說明，圖6 中的扇輪22以假想線繪製。 ▲利用每兩相鄰連接件213之間的夾角0與每兩相鄰扇 葉222之間的夾角θ皆不相同的設計，使氣流依據圖7中 箭頭32料方向流料，能產生二次擾流與增壓的效果， 所以能獲得較第一較佳實施例更好的散熱效果，此外，由 於每兩相鄰連接件213之間的夾角0，與每兩相鄰扇葉222 之間的夾角Θ皆不相同，亦能更為有效地抑制流場干擾的 噪音（風切聲）。 參閱圖8,本發明具降低噪音效果的散熱風扇2之第三 較佳實施例，大致是與該第二較佳實施例相同其中不同 ❸也方在於··該殼座21更包括多數自該外框212朝向該輛 管211方向延伸且長度皆相等的導流葉片214，所述導流葉 片214是位於每兩連接件213之間且與該軸管211相間隔。' 利用位於每兩連接件213之間，且與該軸管2ιι相間隔 的所述導流葉與所述呈葉片型態的連接件213相配 合，更能有效提高抑制流場干擾噪音的功效。 當然，所述導流葉片214除了可以如圖8所示採用相 同長度的設計外’也可如圖9所示採用不等長的設計，依 201122231 然可以達成相同的效果。 紅上所述，本發明具降低噪音效果的散熱風扇2，利用 該扇輪22每兩相鄰扇葉222之間夾角0皆不相同的設計， 使氣流形成擾流而產生增壓效果，同時也能提高氣流的流 速與流量進以提高散熱效果，因此與相同體積之現有散熱 風扇1相較下，該散熱風扇2仍具有更好的散熱效果，而 且利用每兩相鄰扇葉222之間夾角0皆不相同的設計，以 抑制流場干擾的噪音使運轉時能夠更為安靜，故確實能達 成本發明之目的。 惟以上所述者，僅為本發明之較佳實施例而已，當不 月b以此限定本發明實施之範圍，即大凡依本發明申請專利 範圍及發明說明内容所作之簡單的等效變化與修飾皆仍 屬本發明專利涵蓋之範圍内。 【圖式簡單說明】 圖1是一俯視圖，說明一現有的散熱風扇； 圖2是一剖視圖，辅助說明圖1 ; 圖3是一剖視圖，說明中華民國公告第M348864號新 型專利的「改良式增壓風扇」； 圖4是一俯視圖，說明本發明具降低噪音效果的散熱 風扇的第一較佳實施例； 圖5是一剖視圖’輔助說明圖4 ; 圖6是一俯視圖，說明本發明具降低噪音效果的散熱 風扇的第二較佳實施例； 圖7是一剖視圖，輔助說明圖6 ; 201122231 圖8是一俯視圖 ，說明本發明具降低噪音效果的散熱 風扇的第三較佳實施例；及 圖9是一俯視圖，說明該第三較佳實施例的另一種態 201122231 【主要元件符號說明】 2 ...... …散熱風扇 Φ ........ -夾角 〇 1...... • ‘·姐 τΛ： 2丄 L L 211 ·· …軸管 221…… •輪轂 212 ··· …外框 222…… .扇葉 213 ···· …連接件 Θ ........ 爽角 214… …導流葉片 31、32 · •箭頭201122231 VI. Description of the Invention: [Technical Field] The present invention relates to a heat dissipation fan', particularly to a heat dissipation fan having a noise reduction effect. [Prior Art] Referring to Figures 1 and 2', the prior art cooling fan 1 includes a shaft tube u, a housing 12 spaced around the outer circumference of the shaft tube 11, and a plurality of equiangularly spaced connecting shaft tubes 11 and the housing 12 a connecting rod 13 and a fan wheel 14 rotatably disposed in the shaft tube 11 and having a plurality of blades 141, wherein the housing 12 defines an opposite air inlet 121 and an air outlet 122, The blade 141 of the fan wheel 14 draws airflow from the air inlet 121 and discharges it from the air outlet 122 to achieve heat dissipation. However, with the development of technology, the volume of electronic products has become smaller and smaller in recent years. The resulting heat is becoming more and more difficult to eliminate. To this end, relevant companies are actively developing heat-dissipating fans with better heat dissipation. Generally, the most common way to improve the heat dissipation effect is to increase the rotational speed of the fan rim 4, thereby increasing the airflow drawn and discharged to improve the heat dissipation efficiency. However, accelerating the rotational speed of the fan wheel 14 will increase the operation of the cooling fan. Power consumption. In order to reduce the power consumption and at the same time improve the heat dissipation effect, the relevant industry has developed the "Modified Supercharged Fan" type patent of the Republic of China Announcement No. M348864 as shown in Figure 3. The improvement is that a static impeller will be used. 15 is disposed at the air outlet 122 of the housing 12, the static impeller 15 has a frame 151 mounted on the housing U, a fixing ring 201122231 located in the frame 15", and a plurality of connecting the fixing ring 152 and The guiding portion 153 of the frame body 151 can generate a supercharging effect by using the blade 141 and the guiding portion 153 (four), thereby increasing the flow rate and flow rate of the airflow and thereby improving the heat dissipation efficiency; however, the addition of the static impeller 15 also causes an overall volume. Increasingly, in the trend that the product volume is getting smaller and smaller, the 'bulk volume' not only causes waste in the installation space, but also inconvenience in installation and t, and when the airflow passes through the guide portion through the blade 141 153 a wins 'because of the guidance 15 " interference will also produce greater noise (wind cut). SUMMARY OF THE INVENTION Accordingly, it is an object of the present invention to provide a cooling fan having a small volume, a good heat dissipation effect, and a function of reducing noise and reducing noise, and having a noise reduction effect. Therefore, the heat dissipation fan with noise reduction effect of the present invention comprises a housing and a fan wheel pivoted in the housing. The housing includes a shaft tube, an outer frame spaced around the shaft tube, and a plurality of connecting members connecting the shaft tube and the outer frame; the fan wheel includes a hub pivoted to the shaft tube and most of the wheel hub The outwardly extending fan blade, wherein the angle between each two adjacent blades is different. The utility model has the advantages that the design of the angle between each two adjacent blades on the fan wheel is different, so that the airflow forms a turbulence to generate a supercharging effect, and at the same time, the flow rate and the flow rate of the airflow are effectively increased to improve the heat dissipation effect. Not only the overall volume is small, but the use of the blades with different angles to suppress the disturbance of the flow field makes the operation quieter. The above and other technical contents, features and effects of the present invention are clearly shown in the following detailed description of the preferred embodiments of the present invention. Before the present invention is described in detail, it is to be noted that in the following description, similar elements are denoted by the same reference numerals. Referring to Figures 4 and 5', a first preferred embodiment of the heat-dissipating fan 2 of the present invention having a noise reduction effect comprises a housing 21 and a fan wheel 22 pivotally mounted in the housing. The housing 21 includes a shaft tube 211, an outer frame 212' spaced around the shaft tube si, and a plurality of connecting members 213 connecting the shaft tube 211 and the outer frame 212. The fan wheel 22 includes a pivoting member. The hub a of the shaft tube 2ΐ, and most of the blades 222 extending outward from the wheel 221, wherein the angle 0 between each two adjacent blades 222 is different. When the fan wheel 22 of the cooling fan 2 rotates, the airflow flows in the direction of the arrow 31 in FIG. 5, and when the airflow flows through the blade 222, the angle between each two adjacent fans f 222 is utilized. 0 is different to disturb the airflow, so that the airflow creates a turbulent flow to generate a supercharging effect, and at the same time increase the flow rate and flow rate of the airflow, so that it can have better heat dissipation than the existing cooling fan 1 (shown in FIG. 1) under the same volume. effect. Referring to FIG. 4 and the accessory i, the inventors have learned through simulation experiments that the present invention has a low-noise effect cooling fan. The preferred embodiment is only about 25.1 dB(A) [SPL] during operation, and the existing cooling fan is The average arpeggio value is about 45.9 dB(A) [SPL], so the noise value of the cooling fan 2 with the noise reduction effect of the present invention is reduced by 2 〇.8 201122231 dB(A)[SPL], compared with the noise value of the existing cooling fan. It is sufficient to prove that the invention 2 can be operated more quietly. Referring to Figures 6 and 7', a second preferred embodiment of the heat-dissipating fan 2 of the present invention having a noise reduction effect is substantially the same as the first preferred embodiment, and the difference is that: The connecting member 213 is the same angle between the adjacent connecting members 213 of the blade. For convenience of explanation, the fan wheel 22 in Fig. 6 is drawn in an imaginary line. ▲Using a design in which the angle θ between each two adjacent connecting members 213 and the angle θ between each two adjacent blades 222 are different, the airflow can be flowed according to the direction of the arrow 32 in FIG. The effect of the turbulence and the supercharging, so that a better heat dissipation effect than the first preferred embodiment can be obtained, and further, since the angle between each two adjacent connecting members 213 is 0, and between every two adjacent blades 222 The angles are different, and the noise of the flow field interference (wind cut) can be suppressed more effectively. Referring to FIG. 8, a third preferred embodiment of the heat dissipating fan 2 of the present invention having a noise reduction effect is substantially the same as the second preferred embodiment, wherein the housing 21 further includes a plurality of The outer frame 212 faces the guide tube 211 and has equal lengths of the guide vanes 214. The guide vanes 214 are located between and spaced apart from the two connecting members 213. The use of the guide vane located between each of the two connecting members 213 and spaced apart from the shaft tube 2 is matched with the blade-shaped connecting member 213, thereby effectively improving the effect of suppressing the flow field interference noise. . Of course, the guide vanes 214 can be designed with the same length as shown in Fig. 8. Alternatively, the same effect can be achieved according to the design of the unequal length as shown in Fig. 9. According to the red, the cooling fan 2 with the noise reduction effect of the present invention utilizes the design that the angle between the two adjacent blades 222 of the fan wheel 22 is different, so that the airflow forms a turbulence and generates a supercharging effect. The flow rate and flow rate of the airflow can also be increased to improve the heat dissipation effect. Therefore, compared with the existing cooling fan 1 of the same volume, the cooling fan 2 still has a better heat dissipation effect, and utilizes between each two adjacent blades 222. The design of the angle 0 is different, so as to suppress the noise of the flow field interference, the operation can be quieter, so the object of the present invention can be achieved. However, the foregoing is only a preferred embodiment of the present invention, and is not intended to limit the scope of the present invention, that is, the simple equivalent changes made by the scope of the invention and the description of the invention. Modifications are still within the scope of the invention. BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a plan view showing a conventional heat dissipating fan; FIG. 2 is a cross-sectional view for assistance in explaining FIG. 1; and FIG. 3 is a cross-sectional view showing the modified version of the new patent No. M348864 of the Republic of China. Figure 4 is a top plan view showing a first preferred embodiment of the heat-dissipating fan of the present invention having a noise reduction effect; Figure 5 is a cross-sectional view of the auxiliary explanation Figure 4; Figure 6 is a plan view showing the present invention with a reduced view FIG. 7 is a cross-sectional view, and FIG. 7 is a cross-sectional view, and FIG. 6 is a top view showing a third preferred embodiment of the heat-dissipating fan with noise reduction effect of the present invention; Figure 9 is a plan view showing another state of the third preferred embodiment 201122231. [Main component symbol description] 2 ... cooling fan Φ ........ - angle 〇 1.. .... • '·Sister τΛ: 2丄LL 211 ···shaft tube 221... • Hub 212 ··· ...outer frame 222... .fan blade 213 ···· ...connector Θ .... .... cool angle 214... ... guide vanes 31, 32 · • arrow