經濟部中央橾準局舅工消费合作社印製 A7 _B7 五、發明説明（1 ) 本發明係有關於一種安裝在一隧道之頂部的軸向風扇 ，用以吹出一噴射氣流來使該隧道内通風*這種軸向風扇 通常被稱為噴氣風扇。 安裝在該隧道中之喷氣風扇産生一推力來造成用以使 該隧道内之空氣流通的縱向空氣流，在該隧道内侧之空氣 接受來自該噴氣風扇的一壓力，其係等於由將産生之推力 除以該隧道之截面積所得到的值。最近，由於在隧道内交 通量之增加以及動力消耗的增加，所以愈來愈需要藉由該 噴氣風扇加強通風，使得該噴氣風扇可以産生更大的推力 並且具有更高的效率。 第9圖顯示一種習知噴氣風扇，其包含一圓柱形殼體 101 、容納於其中的一電動馬達102 、以及與該電動馬達 102直接連接的一葉輪103 。在第9圖中所示之噴氣風扇 還包含大致画柱形的前與後消音器104以便吸收由該葉輪 103所産生的噪音。 第1 0圖顯示另一種習知噴氣風扇，其具有多數入口 導向葉Η 1,05 。 第11圖顯示另一種習知噴氣風扇，其具有多數出口 導向葉Μ106 。 在這些習知的噴氣風扇中，當該電動馬達102轉動時 ，該葉輪103增加空氣壓力而産生一空氣之流動，因為這 種空氣流具有一轉動分力，在第1 0或1 1圖中所示具有 該等導向葉Η 105或106的該噴氣風扇減少該空氣流的轉 動分力並且，因此，具有比第9圖中所示者更高的效率。 本紙張尺度適用中國國家標準（CNS ) A4規格（210X297公釐） „ .---裝-------訂------.4 (請先閲讀背面之ii.-意事項再填寫本頁) 經濟部中央揉準局貝工消费合作社印製 A7 B7_ 五、發明説明（2 ) 但是，在習知噴氣風扇中I由此所産生的推力僳由三 個值的乘積來決定，即空氣密度、低速通過該噴氣風扇的 質量、以及吹出該消音器104之一噴射氣流的速度。因此 *只有質量流或該噴射氣流之速度任一者的增加都會使推 力增加。 本發明已經發展到可以克服上述缺點。 因此，本發明之一目的為提供一種高效率的噴氣風扇 ，其可以産生一高推力以便再增加在隧道内的空氣壓力而 不會增加質量流量與該噴射氣流的速度。 本發明之另一目的為提供上面這種噴氣嵐扇*其具有 一簡單的結構並且可以以低成本製造。 為達成上述與其他目的，本發明之噴氣風扇包含一大 致圓柱形的殼髏、一容納於其中的電動馬達、以及與該電 動馬逹連接的一葉輪，並且其恃徽在於至少一增壓環與該 穀體同軸地設置並且相對一空氣流之方向位於其下游。 有利地，當由與該穀髏之縱軸横交之一方向看去時， 該增壓環具有一翼形或弧形板截面形狀。 另外也有利地，該增壓環具有翼形或弧形板截面形狀 之一上表面做為其内表面，並且還具有面向該噴氣風扇之 —空氣出口的一前緣以及直徑小於該前緣之直徑但大於該 空氣出口之直徑的後緣。 上述結搆在該增整環上産生一推升力與一拖曳力，其 偽藉由使用由被拉入一高速噴射氣流中之周圍空氣所産生 的一空氣流來達成，該推升力與拖曳力之合力具有一軸向 -5 - 本紙張尺度適用中國國家標準（CNS〉A4規格（210X297公釐) ----l·!----裝------訂------球 I (請先閲讀背面之注意事項再填寫本頁) 經濟部中央橾準局貝工消費合作社印装 A7 B7__ 五、發明説明（3 ) 分力，其方向與該噴射氣流之方向相反並且在該增壓環上 産生一推力。因為該噴射氣流在其方向上受到成為産生在 該增壓琛上之推力之一反作用力的一力量，相較於未具有 增鼷環之習知噴氣風扇，本發明之該噴氣風扇可以再增加 在該隧道内的空氣壓力。 •本發明之上述與其他目的與待徴將可以配合附圖由下 列較佳實施例之詳細說明而更加了解，在其中類似的部件 是由類似的標號來表示，並且其中： 第1圖是本發明之一第一實施例之一噴氣風扇的一截 面圖； 第2圖是一類似第1圖之視圖，但是顯示本發明之一 第二實施例； 第3圖是一類似第1圖之視圖，但是顯示本發明之一 第三實施例； 第4圖是一類似第1圖之視圖，但是顯示本發明之一 第四實施例； 第5圖是一類似第1圖之視圖，但是顯示本發明之一 第五實施例； 第6圖是顯示施加在一增壓琢上之力的一圖； 第7圖是顯示在由一噴射氣流出口到該增壓環之一前 緣的距離以及在該增壓環上産生之一推力之間的關係的一 圖； 第8圖是實測之增壓環的一截面圖； 第9圖是一習知的噴氣風扇； 本紙浪尺度適用中國國家揉準（〇见）八4規格（210’乂297公釐） 1 n n-n I n 1· I •裝 I I I I I —-訂 I I I 1—_ · 妹 (請先M讀背面之注意事項再填寫本頁) A7 B7 五、發明説明（4 ) 第1 0圖是一類似第9圖之視圖，但是顯示另一種習 知噴氣風扇；以及 第1 1圖是一類似第9圖之視圖，但是顯示再一種習 知噴氣風扇。 現請參閲各匾，在第1圖中顯示本發明之一第一實施 例的一噴氣風扇，如圖中所不，該噴氣風扇包含一大致画 柱形的殼體1 、容納於其中之一電動馬達2 、與該電動馬 達2直接連接的一葉輪3 、以及用以吸收由該葉輪3所産 生之噪音的大致圓柱形前與後消音器4 。該噴氣風扇還包 含一增壓環8 ，當由與該殼體1之縱軸橫交之方向看去時 ，該增壓環8具有一翼形或弧形板截面形狀。該增壓環8 v 傜以一同軸之關偽經由多數徑向肋固定在該大致圓柱形後 消音器4上，該增壓環8具有翼形或弧形板截面形狀之一 上表面做為其内表面，並且還具有面向該噴氣風扇之一空 氣出口的一前緣以及直徑小於該前緣之直徑但大於該空氣 出口之直徑的一後緣。 藉由上述结構，當該電動馬達2轉動時，該葉輪3産 經濟部中央標準局負工消費合作社印装 (請先W讀背面之注意事項再填寫本頁) 生一空氣流，該空氣流接著成為一噴射氣流通過該後消音 器4 ，該噴射氣流將周圍的空氣拉入該增壓環8而形成朝 向其中的一空氣流。因此，一推升力L與一拖曳力D施加 在該增壓環8上，如第6圖中所示。該推升力L與該拖曳 力D之合力具有作用在該殼髏1之軸向上的一分力Tt，這 分力Tt的方向與該噴射氣流之方向相反並且被視為施加在 該增壓環8上的一推力。 本紙浪尺度遑用中國國家標準（CNS ) A4洗格（210X297公釐） 經濟部中央揉準局貝工消費合作社印製 A7 _B7_ 五、發明説明（^ ) 第7圖顯示施加在該增壓環8上之分力Tt之測量結果 的一値例子•而第8圖顯示使用在測量時的一增壓環。第 7圖顯示在由該噴射氣流出Q (出口直徑：100 mm)到該 增壓環8之前緣的距離以及以該噴射氣流之速度做為一參 數施加在該增壓環上之該推力Tt之間的關偽，第7圖顯示 在該噴射氣流之速度為8111/3、17.7111/3、21.7111/3、或27.7 m/s時並且在該距離（X)範圍是由0到350 時，該推力 Tt産生在該增壓環上。 當該推力Tt之一反作用力因此作用在該增壓環8上時 ，該噴射氣流受到該噴射氣流之方向上的一增壓力Π，因 此，具有如第1圖中所示的該增壓環8可以讓該噴氣風扇 具有較大的推力以及一較高的效率，因此可以增加在該隧 道内的空氣壓力。 在此應注意的是雖然在上述實施例中，所說明之該增 壓環8係具有一翼形截面，但是它也可以是一弧形截面， 只要它具有一流線形内表面卽可。還要注意的是該增壓環 8可以由一環形大致平坦板所製成，但是，在此例中，該 大致平坦板是彎曲的因而在該噴射氣流之方向上具有一徑 向向内凸出之大致弧形。 另外還要注意的是雖然該等徑向肋7可以具有多邊形 截面，如矩形或者一圓形截面，它們以具有流線形截面來 減少空氣阻抗或壓力損失為較佳。 第2圖顯示本發明之一第二實施例的一噴氣風扇，其 具有一類似第1圖之結構，但是還包含多數入口導向葉片 本紙張尺度適用中國國家揉準（CNS ) A4規格（21 OX 297公釐） ^^^1 —.1 n TH ^^^1 HI ^n· nn- 、^eJ (請先w讀背la之·i意Ϋ項再填寫本X) 經濟部中央橾準局負工消費合作社印製 A7 B7 五、發明説明（6) 5 ，其偽固定地安装在相對該空氣流之方向位於該葉輪3 上游之該電動馬達2四週。 第3圖顯示本發明之一第三實施例的一噴氣風扇，其 具有一類似第1圖之結構，但是還包含多數出口導向葉片 6 ，其僳固定地安装在相對該空氣流之方向位於該葉輪3 上游之該電動馬達2四週。 在第2與3圖中所示之結構可以減少由該葉輪3所産 生之空氣流的分力，因此，相較於第1圖之噴氣風扇，由 該噴氣風扇所産生的該推力以及其效率可以再增加以便增 加在該隧道内的空氣壓力。 第4圖顯示本發明之一第四實施例的一噴氣風扇，其 具有一類似第1圖之結構，但是具有另一種增壓環8 ，其 偽以同軸之關偽經由多數徑向肋7與大致圓柱形後消音器 4連接。 在此應注意的是在第1到4圖中所示之該噴氣風扇具 有一或兩個增壓環8 ，但是它可以具有三或多値互相同軸 地設置的增壓琛。 第5圔顯示本發明之一第三實施例的一噴氣風扇，其 包含一大致画柱形的殼體1 、容纳於其中之一電動馬達2 、與該電動馬達2直接連接的一葉輪3 、以及大致圓柱形 前與後消音器4 。第5圖之該噴氣風扇還包含一增壓環8 ，其未與其直接連接但是經由一支持捍9固定在該隧道之 頂部，因此該殼髏1與該增壓環8以同軸的關像軸向地對 準。 本紙張尺度適用中國國家橾準（CNS ) A4規格（210X297公釐） (請先聞讀背面之注意事項再填寫本頁) 裝.Printed by A7 _B7 of the Central Laboratories and Consumers Cooperatives of the Ministry of Economic Affairs 5. Description of the Invention (1) The invention relates to an axial fan installed on the top of a tunnel to blow out a jet of air to ventilate the tunnel. * This axial fan is often called a jet fan. The jet fan installed in the tunnel generates a thrust to cause a longitudinal air flow to circulate the air in the tunnel. The air inside the tunnel receives a pressure from the jet fan, which is equal to the thrust generated by the jet fan. Divided by the cross-sectional area of the tunnel. Recently, due to the increase in the traffic volume and the increase in power consumption in the tunnel, it is increasingly necessary to strengthen the ventilation by the jet fan, so that the jet fan can generate greater thrust and have higher efficiency. FIG. 9 shows a conventional jet fan, which includes a cylindrical casing 101, an electric motor 102 accommodated therein, and an impeller 103 directly connected to the electric motor 102. The air-jet fan shown in FIG. 9 further includes front and rear mufflers 104 which are drawn substantially cylindrically in order to absorb noise generated by the impeller 103. Figure 10 shows another conventional jet fan with a majority of inlet guide vanes 1,05. Figure 11 shows another conventional jet fan with a majority of exit guide vanes M106. In these conventional jet fans, when the electric motor 102 rotates, the impeller 103 increases the air pressure to generate a flow of air, because this air flow has a rotational component force, as shown in Figure 10 or Figure 11. The air-jet fan shown with the guide vanes 105 or 106 reduces the rotational component of the air flow and, therefore, has a higher efficiency than that shown in FIG. 9. This paper size is applicable to Chinese National Standard (CNS) A4 specification (210X297 mm) „.-----------------------------. 4 (Please read the ii.-intention on the back first (Fill in this page again.) Printed by the Central Bureau of the Ministry of Economic Affairs, Shellfish Consumer Cooperatives. A7 B7_ 5. Description of the invention (2) However, in the conventional jet fan, the thrust generated by I is determined by the product of three values. That is, the density of air, the mass of the jet fan passing at low speed, and the speed of the jet stream blowing out of one of the mufflers 104. Therefore * only the increase of either the mass stream or the velocity of the jet stream will increase the thrust. It has been developed to overcome the above disadvantages. Therefore, it is an object of the present invention to provide a high-efficiency jet fan that can generate a high thrust so as to increase the air pressure in the tunnel without increasing the mass flow rate and the speed of the jet airflow. Another object of the present invention is to provide the above-mentioned jet fan * which has a simple structure and can be manufactured at low cost. To achieve the above and other objects, the jet fan of the present invention includes a substantially cylindrical Shell, an electric motor accommodated therein, and an impeller connected to the electric stirrup, and its badge is that at least one booster ring is arranged coaxially with the valley body and is located downstream from the direction of an air flow Advantageously, the booster ring has a wing or arc-shaped plate cross-sectional shape when viewed from a direction transverse to the longitudinal axis of the valley skull. In addition, the booster ring also has a wing or arc shape. An upper surface of one of the cross-sectional shapes of the profile plate is used as its inner surface, and also has a leading edge facing the air outlet of the jet fan and a trailing edge having a diameter smaller than the diameter of the leading edge but larger than the diameter of the air outlet. A thrust force and a drag force are generated on the booster ring, which is achieved by using an air flow generated by the surrounding air drawn into a high-speed jet stream. The combined force of the lift force and the drag force has One axis-5-This paper size applies to Chinese national standards (CNS> A4 size (210X297 mm) ---- l ·! ---- installation ------ order ------ ball I (Please read the notes on the back before filling out this page) Central Ministry of Economic Affairs A7 B7__ printed by the Zhuhai Bureau Consumer Cooperative V. Description of the invention (3) The component force has a direction opposite to the direction of the jet stream and generates a thrust on the booster ring. Because the jet stream is subjected to A force that generates a reaction force of the thrust force on the supercharging cylinder can further increase the air pressure in the tunnel compared to a conventional jet fan without a booster ring. The above and other objects and requirements of the invention will be better understood from the detailed description of the following preferred embodiments in conjunction with the accompanying drawings, in which similar components are denoted by similar reference numerals, and among them: FIG. 1 is the A sectional view of a jet fan according to a first embodiment; FIG. 2 is a view similar to FIG. 1, but showing a second embodiment of the present invention; FIG. 3 is a view similar to FIG. 1, but FIG. 4 shows a third embodiment of the present invention; FIG. 4 is a view similar to FIG. 1, but shows a fourth embodiment of the present invention; FIG. 5 is a view similar to FIG. 1, but shows the present invention. Fifth Embodiment; FIG. 6 is a diagram showing a force exerted on a supercharging force; FIG. 7 is a diagram showing a distance from an ejection gas outlet to a leading edge of the supercharging ring and at the supercharging A diagram of the relationship between a thrust generated on the ring; Fig. 8 is a cross-sectional view of a measured booster ring; Fig. 9 is a conventional jet fan; ) 8 4 specifications (210 '乂 297 mm) 1 n nn I n 1 · I • Install IIIII —-Order III 1 — — • Girl (please read the precautions on the back before filling this page) A7 B7 V. Description of the Invention (4) FIG. 10 is a view similar to FIG. 9 but showing another conventional jet fan; and FIG. 11 is a view similar to FIG. 9 but showing another conventional jet fan. Please refer to each plaque. In FIG. 1, a jet fan according to a first embodiment of the present invention is shown. As shown in the figure, the jet fan includes a substantially cylindrical casing 1 and is accommodated therein. An electric motor 2, an impeller 3 directly connected to the electric motor 2, and generally cylindrical front and rear mufflers 4 for absorbing noise generated by the impeller 3. The jet fan also includes a booster ring 8 which, when viewed from a direction transverse to the longitudinal axis of the casing 1, has a wing shape or a curved plate cross-sectional shape. The supercharging ring 8 v 傜 is fixed on the generally cylindrical rear muffler 4 through a plurality of radial ribs with a coaxial connection pseudo, and the supercharging ring 8 has one of the upper surfaces of the wing-shaped or arc-shaped plate cross-section as The inner surface also has a leading edge facing an air outlet of the jet fan and a trailing edge having a diameter smaller than the diameter of the leading edge but larger than the diameter of the air outlet. With the above structure, when the electric motor 2 rotates, the impeller 3 is printed by the Consumers Cooperative of the Central Standards Bureau of the Ministry of Economic Affairs (please read the precautions on the back before filling this page). Next, a jet airflow passes through the rear muffler 4, and the jet airflow draws the surrounding air into the booster ring 8 to form an airflow toward it. Therefore, a thrust force L and a drag force D are applied to the booster ring 8, as shown in FIG. The combined force of the thrust force L and the drag force D has a component force Tt acting in the axial direction of the shell 1. The direction of the component force Tt is opposite to the direction of the jet airflow and is regarded as being applied to the booster ring. A thrust on 8. The scale of this paper is in accordance with Chinese National Standard (CNS) A4 (210X297 mm). Printed by the Central Government Bureau of the Ministry of Economic Affairs, Shellfish Consumer Cooperatives. An example of the measurement result of the component force Tt on 8 • And Figure 8 shows a booster ring used in the measurement. Fig. 7 shows the distance from the jet airflow Q (outlet diameter: 100 mm) to the leading edge of the booster ring 8 and the thrust force Tt applied to the booster ring with the speed of the jet airflow as a parameter Figure 7 shows that when the velocity of the jet is 8111/3, 17.7111 / 3, 21.7111 / 3, or 27.7 m / s and when the distance (X) ranges from 0 to 350, The thrust Tt is generated on the booster ring. When a reaction force of the thrust Tt acts on the supercharging ring 8, the jet air current is subjected to a pressure increase in the direction of the jet air flow. Therefore, the supercharging ring as shown in FIG. 1 is provided. 8 can make the jet fan have a larger thrust and a higher efficiency, so it can increase the air pressure in the tunnel. It should be noted here that although in the above embodiment, the booster ring 8 has a wing-shaped cross section, it may also have an arc-shaped cross section as long as it has a first-class linear inner surface. It should also be noted that the booster ring 8 may be made of an annular substantially flat plate, but in this example, the substantially flat plate is curved and thus has a radially inward projection in the direction of the jet airflow. It is roughly curved. It should also be noted that although the radial ribs 7 may have a polygonal cross-section, such as a rectangular or a circular cross-section, they preferably have a streamlined cross-section to reduce air resistance or pressure loss. Fig. 2 shows a jet fan according to a second embodiment of the present invention, which has a structure similar to that of Fig. 1 but also includes most of the inlet guide vanes. The paper size is applicable to the Chinese National Standard (CNS) A4 (21 OX) 297 mm) ^^^ 1 —.1 n TH ^^^ 1 HI ^ n · nn-, ^ eJ (please read the item “la” and “i” before filling out this X) Central Bureau of Standards, Ministry of Economic Affairs A7 B7 printed by the Consumer Cooperative 5. Fifth, the description of the invention (6) 5 is pseudo-fixedly installed around the electric motor 2 located upstream of the impeller 3 with respect to the air flow direction. FIG. 3 shows a jet fan according to a third embodiment of the present invention, which has a structure similar to that of FIG. 1, but also includes a plurality of outlet guide vanes 6, whose cymbals are fixedly installed in the direction opposite to the direction of the air flow. Around the electric motor 2 upstream of the impeller 3. The structure shown in Figs. 2 and 3 can reduce the component of the air flow generated by the impeller 3. Therefore, compared with the jet fan in Fig. 1, the thrust generated by the jet fan and its efficiency It can be increased further to increase the air pressure in the tunnel. FIG. 4 shows a jet fan according to a fourth embodiment of the present invention, which has a structure similar to that of FIG. 1 but has another booster ring 8 which is coaxially connected via a plurality of radial ribs 7 and A generally cylindrical rear muffler 4 is connected. It should be noted here that the jet fan shown in Figures 1 to 4 has one or two booster rings 8 but it may have three or more booster coils arranged coaxially with each other. FIG. 5A shows a jet fan according to a third embodiment of the present invention, which includes a substantially cylindrical housing 1, an electric motor 2 accommodated therein, and an impeller 3 directly connected to the electric motor 2. And the generally cylindrical front and rear mufflers 4. The jet fan in FIG. 5 also includes a booster ring 8 which is not directly connected to it but is fixed at the top of the tunnel via a support 9. Therefore, the shell 1 and the booster ring 8 are coaxial with each other on the image axis. Align to the ground. This paper size is applicable to China National Standard (CNS) A4 (210X297mm) (Please read the precautions on the back before filling this page).
*tT 經濟部中央揉率局貝工消费合作社印裝 A7 _ B7__ 五、發明説明（7 ) 如上所述*在本發明中，與該殼體1同軸地設置的一 或多値增壓環δ有助於增加推力以友效率，因此增加該.險 道内的空氣壓力。緣是•如是所需要的通風童是相同的， 本發明之噴氣風扇可以減少動力消耗或者相較於習知殼髏 ，其數目可以減少。 雖然本發明己經藉由數値例子並且配合附圖來完整地 說明，在此應注意的是熟習此項技藝者可以進行各種改變 與修改，因此，除非這些改變與修改偏離本發明之精神與 範醻，它們應被視為被包括在其中。 1… ..殼體 元件標號對照 L… .推升力 2… ..電動馬逹 D… .拖曳力 3… ..葉輪 Tt... .分力 4.. ..消音器 Fj... .增壓力 5.. ..入口導向葉Η 101. · ..圓柱形殼體 6.. ..出口導向葉片 102.. ..電動馬達 7.. ..徑向肋 103.. ..葉輪 8.. ..增壓環 104.. ..消音器 9.. ..支持捍 105.. ..人口葉片 106.. ..出口葉片 -10 - 本纸張尺度適用t國國家揉準（CNS)Α4規格（2丨0X297公釐） IB·—· fm fl^m —^i^i flu^i m· UBie n^n ^ϋ·— im^M m·· mft "、T (請先閱讀背*之汰意事項再填寫本頁)* tT Printed by the Central Government Bureau of the Ministry of Economic Affairs, Shellfish Consumer Cooperatives, A7 _ B7__ V. Description of the Invention (7) As described above * In the present invention, one or more pressure booster rings δ arranged coaxially with the casing 1 It helps to increase the thrust efficiency, and therefore increases the air pressure in the danger lane. The reason is that if the required ventilators are the same, the jet fan of the present invention can reduce power consumption or its number can be reduced compared to the conventional shell and skull. Although the present invention has been fully explained through several examples and accompanying drawings, it should be noted here that those skilled in the art can make various changes and modifications, so unless these changes and modifications deviate from the spirit and Fan Ye, they should be considered as included. 1… .. The number of housing elements is compared with L…. Lifting force 2…. Electric stirrup D…. Dragging force 3… .. Impeller Tt ... 4. Component force 4 ... Silencer Fj ... Increasing pressure 5 ... Inlet guide vane 101 .... Cylindrical housing 6. Outlet guide vane 102 ... Electric motor 7. Radial rib 103 .. Impeller 8 .. .. Booster ring 104 .... Silencer 9 .... Support 105 .... Population blades 106 ... Export blades -10-This paper size is applicable to countries and countries (CNS) ) Α4 specifications (2 丨 0X297 mm) IB · — · fm fl ^ m — ^ i ^ i flu ^ im · UBie n ^ n ^ ϋ · — im ^ M m ·· mft ", T (Please read first (Please fill in this page if you want to read the *)