經濟部中央榡準局員工消費合作社印製 组343 70轉 A7 B7 五、發明説明（） 本發明涉及電動鼓風機，特別是涉及能提高送風效率 的電動鼓風機。 過去的電動鼓風機，如第八圖〜第九圖中所示，設有與 電動機（圖中未示）的驅動軸D相連結的作為葉片式工作輪 5 的葉輪31，在葉輪31與電動機之間配置的擴壓器32，以 及收納所述葉輪31與擴壓器32的渦旋殼體33。 擴壓器32有圓盤狀的大體由平板構成的底壁部34,在 該底壁部的與所述葉輪31相對侧的面上突設著多個渴旋 葉片35，在所述葉輪31反對側的面上突設著多個回流通 10 道葉片36。 過去的擴壓器32,其渦旋葉片35及回流通道葉片36 設在底壁部34上，其渦旋葉片35的外端直徑，回流通 道葉片36的外端直徑D2及圓盤狀大致平板的直徑D3大 體相同（DpD25D3)。 15 在這樣的結構中，為了使風W,從渦旋通道37流入回 流通道38，通常渦旋葉片35外端不與渦旋殼體33的内周 面緊密接觸，而是留有環狀間隙39。通過渦旋葉片35的 風W,[參閱第八(a)圖]通過這個環狀間隙39(參閱第九圖）, 流入回流通道38[參閱第八(b)圖]* 20 若環狀間隙39太窄，則不能充分保證通道面積，使通 氣阻力變大，成為送風效率下降的原因。 為了確保通道面積，有通過減少渦旋葉片35的外徑 D1以增大環狀間隙39的方法。這種情況下，渦旋葉片35 的長度會變短，使得把從葉輪31排出的風的動壓轉換為 -3- 本紙張尺度適用中國國家標準{ CNS ) A4規格（210X297公釐） (請先閱讀背面之注意事項再填寫本頁) 裝. 訂 經濟部中央標準局貝工消費合作社印" ά34370*ϊ at Β7 五、發明説明（） 靜壓而提高送風效率的渦旋通道37變短，故存在著送風 效率下降的問題》 與此相反，若不改變渦旋葉片35的長度，而是加大竭 旋殼體33的外徑，雖也是一種可確保通道面積的方法，但 5 是此方法有使電動鼓風機的尺寸變大的問題。 解決這種大型化的方法，有特開平7-18994號公報中 所披露的方法，如第八(a)圖中所示，它把底壁部34切去 一塊而形成大體為三角形的通道40，以此成為確保通道面 積的方法，但這種方法，也使通道面積擴大得不充分，結 10 果還是不得不縮短渦旋葉片35的長度。 此外，在這種情況下，由於在渦旋通道37與回流通道 38之間沒有相關關係，故不能實現從渦旋通道37流入回 流通道3 8的順利流入通道。例如，在相鄰的兩條滿旋葉 片35之間即使形成三角形通道40,回流通道葉片36也往 15 往會堵塞三角形通道40» 進而，在通過渦旋通道37的風W,流入回流通道38 時，由於完全沒有來自渦旋通道37端面的導向葉片，在這 部分處會發生紊流，存在著使送風效率下降的問題。 為了解決這種問題而提出本發明，其目的是提供一種 20 電動鼓風機，它能使從渦旋通道流向回流通道的風順利流 動，以提高送風效率。 本發明的電動鼓風機，設有與電動機驅動軸連接的葉 輪，配置在該葉輪與電動機之間的擴壓器，以及至少容納 有所述葉輪及擴壓器的渦旋殼體》 -4- ---------「裝— (請先閲t背面之>±'#^項再填寫本頁}Printed by the Consumers' Cooperative of the Central Provincial Bureau of the Ministry of Economic Affairs Group 343 70 rpm A7 B7 V. Description of the invention () The present invention relates to electric blowers, and particularly to electric blowers that can improve the efficiency of air supply. In the conventional electric blower, as shown in FIGS. 8 to 9, an impeller 31 as a vane type work wheel 5 connected to a drive shaft D of a motor (not shown) is provided. The diffuser 32 is arranged between the diffusers 32 and the scroll housing 33 that houses the impeller 31 and the diffuser 32. The diffuser 32 has a disk-shaped bottom wall portion 34 generally composed of a flat plate, and a plurality of thirsty blades 35 are protruded on a surface of the bottom wall portion opposite to the impeller 31. A plurality of backflow passage blades 36 are provided on the opposite side. In the conventional diffuser 32, the scroll blades 35 and the return channel blades 36 are provided on the bottom wall portion 34. The outer diameter of the scroll blades 35, the outer diameter D2 of the return channel blades 36, and a disk-like substantially flat plate. The diameter D3 is approximately the same (DpD25D3). 15 In such a structure, in order for the wind W to flow from the scroll passage 37 into the return passage 38, the outer end of the scroll blade 35 is generally not in close contact with the inner peripheral surface of the scroll housing 33, but an annular gap is left. 39. The wind W passing through the vortex blades 35, [see figure 8 (a)], flows through the annular gap 39 (see figure 9), and flows into the return passage 38 [see figure 8 (b)] * 20 If 39 is too narrow, the channel area cannot be sufficiently ensured, and the ventilation resistance becomes large, which becomes the cause of the decrease in air supply efficiency. In order to ensure the passage area, there is a method of increasing the annular gap 39 by reducing the outer diameter D1 of the scroll blade 35. In this case, the length of the scroll blade 35 will be shortened, so that the dynamic pressure of the wind discharged from the impeller 31 will be converted to -3- This paper size applies the Chinese national standard {CNS) A4 specification (210X297 mm) (please (Please read the notes on the back before filling this page). Packing. Ordered by the Central Standards Bureau of the Ministry of Economic Affairs of the Shellfish Consumer Cooperatives " ά34370 * ϊ at Β7 V. Description of the invention () The vortex channel 37 which improves the air supply efficiency by static pressure becomes shorter Therefore, there is a problem that the air supply efficiency is reduced. ”On the contrary, if the length of the scroll blade 35 is not changed, but the outer diameter of the exhaust casing 33 is increased, it is also a method to ensure the channel area, but 5 is This method has a problem that the size of the electric blower becomes large. As a method for solving such a large-scale problem, there is a method disclosed in Japanese Patent Application Laid-Open No. 7-18994. As shown in FIG. 8 (a), the bottom wall portion 34 is cut out to form a substantially triangular channel 40. This method is used to ensure the channel area. However, this method also causes the channel area to be enlarged insufficiently. As a result, the length of the scroll blade 35 has to be shortened. Further, in this case, since there is no correlation between the vortex channel 37 and the return channel 38, a smooth inflow channel from the vortex channel 37 into the return channel 38 cannot be achieved. For example, even if a triangular channel 40 is formed between two adjacent full-rotation blades 35, the return channel blade 36 will block the triangular channel 40 to 15 ». Furthermore, the wind W passing through the vortex channel 37 flows into the return channel 38. At this time, since there are no guide vanes from the end surface of the scroll channel 37 at all, turbulence occurs at this portion, and there is a problem that the air supply efficiency is lowered. The present invention has been made in order to solve such a problem, and an object thereof is to provide a 20 electric blower which can smoothly flow the wind flowing from the vortex passage to the return passage to improve the air supply efficiency. The electric blower of the present invention is provided with an impeller connected to a drive shaft of a motor, a diffuser disposed between the impeller and the motor, and a scroll housing containing at least the impeller and the diffuser "-4-- -------- 「装 — (Please read > ± '# ^ items on the back of the t before filling out this page}
，丁. ^B 經濟部中央標準局員工消費合作社印製 4 343 7 a7 B7 五、發明説明（） 所述擴壓器有圓盤狀的大體由平板構成的底壁部’在 該底壁部的與所述葉輪相對側的面上突設有多個滿旋葉片， 在所述葉輪反對側的面上突設有多個回流通道葉片’其特 徵在於： 5 使所述擴壓器的渦旋葉片的外端直徑大於所述回流通 道葉片的外端直徑； 所述擴壓器的兩相鄰渦旋葉片與底壁部所圍成的滿旋 通道的形狀為使所述渦旋通道底壁部的外周端與所述回流 通道葉片的曲線形外周側大體一致的形狀，而且所述渦旋 1〇葉片的外周側前端部分突出於所述底壁部的外周端； 所述渦旋葉片的外周側前端部分，所述回流通道葉片 外周外側，以及所述渦旋殼體的側壁共同包圍形成環狀的 第一空間部。 所述渦旋葉片的外周端位於距所述渦旋殼體的内周面 15 為umn1處，以在該渦旋葉片外周端與渦旋殼體之間形成 環狀的第二空間部，是理想的。 所述回流通道葉片的前端位於與所述渦旋葉片的曲線 形外肉端一致或在外周端之内的位置上，是理想的。 所述渦旋葉片與回流通道葉片分別設有17-23個相同 20數目的片數，是理想的。 以卞對附圖及其部分符號作簡單說明。 第，圖是示出本發明一實施例的電動鼓風機的剖面說 明圖。 第；圖是第一圖中擴壓器的俯視圖；第二(a)圖是從上 -5- (請先閱讀背面之注意事項再填寫本頁) 裝 本^ 丨 (加x297 公着） 經濟部中央標隼局員工消費合作社印來 43413 7 0_ A7 B7 五、發明説明（） 面看的擴壓器圖；第二(b)圖是從下面看的擴壓器圖。 第三圖是第一圖中擴壓器剖視圖。 第四圖是從突設有渦旋葉片側所見的第一圖的擴壓器 透視圖。 5 第五圖是從突設有回流通道葉片侧所見的第一圖的擴 壓器透視圖。 第六圖是第一圖渦旋葉片前端部分的放大圖。 第七圖是作為第六圖的比較例，表示回流通道葉片自 渦旋葉片向外突出狀態的說明圖。 10 第八圖是現有技術擴壓器的俯視圖；第八(a)圖是從上 面看擴壓器圖；第八(b)圖是從下面看擴壓器圖。 第九圖是第八圖中擴壓器的俯視圖。 在上述附囷中，1葉輪，2擴壓器，3渦旋殼體，4底壁部， 5渦旋葉片，6回流通道葉片，7渦旋通道，8回流通道，11 15 第一空間部。 下面，參照附圖詳細地說明本發明的電機鼓風機。第 一圖是表示本發明一實施例電動鼓風機的剖面說明圖；第 二圖是第一圖中擴壓器的俯視圖；第三圖是擴壓器的剖視 圖；第四圖是從突設渦旋葉片一側所見的擴壓器透視圖； 20 第五圖是從突設回流通道葉片侧所見的擴壓器透視圖；第 六圖是第一圖中渦旋葉片前端部分放大圖；第七圖是第六 圖的比較例，表示回流通道葉片比渦旋葉片更向外侧突出 的狀態的說明圖。 第一圖示出的電動鼓風機，和現有技術一樣，設有連 -6- 本紙張尺度適用中國國家樣準（ CNS >A4規格（2丨0X297公釐） (請先閱I背面之纪意事項再填寫本頁) 裝-D. ^ B Printed by the Consumers 'Cooperative of the Central Standards Bureau of the Ministry of Economic Affairs 4 343 7 a7 B7 V. Description of the invention () The diffuser has a disc-shaped bottom wall portion composed of a flat plate' on the bottom wall portion A plurality of full-rotation blades are protruded on a surface opposite to the impeller, and a plurality of return passage blades are protruded on a surface on the opposite side of the impeller. The characteristics are as follows: 5 Make the vortex of the diffuser The diameter of the outer end of the rotating blade is larger than the diameter of the outer end of the return channel blade; the shape of the full-spinning channel enclosed by two adjacent vortex blades and the bottom wall portion of the diffuser is such that the bottom of the vortex channel is The outer peripheral end of the wall portion is substantially the same shape as the curved outer peripheral side of the return channel blade, and the front end portion of the outer peripheral side of the scroll 10 blade protrudes from the outer peripheral end of the bottom wall portion; the scroll blade A front end portion of the outer peripheral side, an outer peripheral outer side of the return passage blade, and a side wall of the scroll housing collectively surround a first space portion forming an annular shape. The outer peripheral end of the scroll blade is located at umn1 from the inner peripheral surface 15 of the scroll casing to form a ring-shaped second space portion between the outer peripheral end of the scroll blade and the scroll casing. ideal. It is desirable that the front end of the backflow passage blade is located at a position that coincides with or is within the outer peripheral end of the curved outer meat end of the scroll blade. It is desirable that the scroll blades and the return channel blades are respectively provided with 17-23 pieces with the same number of 20 pieces. A brief description of the drawings and some of the symbols is given by 卞. Fig. 1 is a cross-sectional view illustrating an electric blower according to an embodiment of the present invention. Figure; Figure is the top view of the diffuser in the first figure; Figure 2 (a) is from the top -5- (Please read the precautions on the back before filling this page) Assembled ^ (plus x297) Economic Printed by the Consumers' Cooperative of the Ministry of Standards and Technology Bureau of the People's Republic of China 43413 7 0_ A7 B7 V. Description of the invention () The diffuser diagram viewed from above; The second (b) diagram is the diffuser diagram viewed from below. The third figure is a sectional view of the diffuser in the first figure. The fourth figure is a perspective view of the diffuser of the first figure seen from the side where the scroll blades are protruded. 5 The fifth figure is a perspective view of the diffuser of the first figure as seen from the side of the blade where the return passage is protruded. The sixth figure is an enlarged view of the front end portion of the scroll blade of the first figure. The seventh figure is a comparative example of the sixth figure, and is an explanatory view showing a state where the return passage blades protrude outward from the scroll blades. 10 The eighth figure is a top view of a prior art diffuser; the eighth (a) diagram is a diagram of the diffuser viewed from above; the eighth (b) diagram is a diagram of the diffuser viewed from below. The ninth figure is a top view of the diffuser in the eighth figure. In the above attachment, 1 impeller, 2 diffuser, 3 scroll housing, 4 bottom wall portion, 5 scroll blades, 6 return channel blades, 7 scroll channels, 8 return channels, 11 15 first space portion . Hereinafter, the motor blower of the present invention will be described in detail with reference to the drawings. The first diagram is a sectional explanatory view showing an electric blower according to an embodiment of the present invention; the second diagram is a top view of the diffuser in the first diagram; the third diagram is a sectional view of the diffuser; the fourth diagram is a protruding scroll Perspective view of the diffuser seen from the side of the blade; 20 The fifth view is a perspective view of the diffuser seen from the side of the blade with the protruding return channel; the sixth view is an enlarged view of the front end of the scroll blade in the first view; the seventh view It is a comparative example of the sixth figure, and is an explanatory diagram showing a state where the return passage blade protrudes more outward than the scroll blade. The electric blower shown in the first picture is the same as in the prior art. It is equipped with the -6-. This paper size applies to Chinese national standards (CNS > A4 specification (2 丨 0X297 mm). (Please read the notes on the back of I) Matters need to be filled out on this page)
、1T 五、發明説明（）第88112〇57號 A7 B7 修正頁89.10 經濟部中央棹準局貝工消费合作社印^ 結電動機（圖中未示)驅動軸D葉輪式的葉輪1，配置在葉 輪1與電動機之間的擴壓器2,以及收容該葉輪1及擴壓 器2的渦旋殼體3;進而，第一囷的渦旋殼體3中電動機 座F也容納在其中。 而且，擴壓器2也和過去一樣，有圓盤狀大禮由平板 構成的底壁部4，在該底壁部4的葉輪1的對向一側面上 突設著許多渦旋葉片5,在葉片1的反對側的面上突設許 多回流通道葉片6。 本實施例的電動鼓風機，如第二圖〜第五圖所示，其擴 壓器2的渦旋葉片5的外端直徑D4比所述回流通道6的 外端直徑D5更大。 然而，擴壓器2的相鄰兩渦旋葉片5與底壁部4所圍 成的渦旋通道7的形狀為使渦旋通道7的底壁部4的外周 端（第二囷中的出口端7a)與弩曲成曲線形的所述回流通道 葉片6的曲線形外周侧部份6a大艚一致的形狀，進而，使所 延渦旋葉片5的前媿韶公5a從所述底壁部4的外周端（所 述出口端7a)突出* 而且，如第三圖中所示，還形成由渦旋葉片5的前端 部5a，回流通道葉片6及渦旋殼體3的側壁所固成的環狀 2〇 的第一空間11 * 即是說，在擴壓器2中，弩成曲線形的回流通道葉片 6的外周側部分如成為渦旋通道7的出口端7ae出口端7a 更下游側的通道7b則成為雖然有渦旋通道7的侧部通道 壁（即渦旋葉片5的前端部分5a)但不存在底壁部，成為軸 10 15 本紙張尺度ϋ财關家蘇（CNS ) Α4規格（210X297公俊） (讀先閲讀背面之注意事項再填寫本頁) -裝' 訂、 1T V. Description of the invention () No. 8812〇57 A7 B7 amendment page 89.10 Printed by the Central Bureau of Standards, Ministry of Economic Affairs, Shellfish Consumer Cooperatives ^ Motor (not shown), impeller 1 with drive shaft D, impeller type, arranged on the impeller The diffuser 2 between 1 and the motor, and the scroll housing 3 that houses the impeller 1 and the diffuser 2; further, the motor holder F in the scroll housing 3 of the first frame is also accommodated therein. Moreover, the diffuser 2 also has a bottom wall portion 4 made of a flat plate, as in the past, and a plurality of scroll blades 5 are protruded from the side surface of the impeller 1 opposite to the bottom wall portion 4, A plurality of return passage blades 6 are projected on the surface on the opposite side of the blade 1. As shown in the second to fifth figures of the electric blower of this embodiment, the outer diameter D4 of the scroll blade 5 of the diffuser 2 is larger than the outer diameter D5 of the return passage 6. However, the shape of the scroll passage 7 surrounded by two adjacent scroll blades 5 and the bottom wall portion 4 of the diffuser 2 is such that the outer peripheral end of the bottom wall portion 4 of the scroll passage 7 (the exit in the second ridge) The end 7a) conforms to the shape of the curved outer peripheral portion 6a of the return passage blade 6 which is curved in a crossbow shape, so that the front end 5a of the extended scroll blade 5 passes from the bottom wall. The outer peripheral end (the exit end 7a) of the portion 4 protrudes * Furthermore, as shown in the third figure, a front end portion 5a of the scroll blade 5, a return passage blade 6 and a side wall of the scroll casing 3 are also formed. The first space 11 formed in a ring shape 20 * That is to say, in the diffuser 2, the outer peripheral side portion of the return passage blade 6 having a curved cross-bow shape becomes the exit end 7ae of the swirl passage 7 and the exit end 7a. The channel 7b on the downstream side becomes the side channel wall of the vortex channel 7 (ie, the front end portion 5a of the vortex blade 5), but there is no bottom wall portion, and it becomes the shaft 10 15 paper size ϋ 财 关 家 苏 (CNS ) Α4 specifications (210X297 Gongjun) (Read the precautions on the back before filling in this page)-Install 'Order
K 蜮濟部中决捸準为員工消費合作社印^ 4343 70 7、發明说明（） 向開放狀態》而且，沒有底壁部4的渦旋通道7外侧的渴 旋葉片5的前端部分5a，處於離開電動機座F的狀態。 然而，即使將渦旋葉片5延伸到渦旋殼體3的内周表 面附近，使其與渦旋殼體3的内周面的環狀間陈消失或變 5 小，與W2也能通過渦旋殼體3内部的第一空間部11，能 充分確保流入回流通道8的通道面積，故可以不加大電動 敢風機的外形尺寸，可確保把渦旋通道7加長到電動機最 大直徑的程度。其結果，可以提高送風效率》 此外，從渦旋通道7的出口端吹出的風W2，雖然在抽 1〇 向上為開放狀態，但由於渦旋通道7的倒部通道壁仍存在， 相對於軸，在垂直方向上可由渦旋葉片5進行整流，在抽 初上，由於渦旋葉片5的前端部分5a為懸浮在空中的狀 態，故渦旋葉片5不會阻塞風W2的通道，風W2可順利地 換向成為軸向，又由於被導入回流通道8，故可提高送風 15敫率。 回流通道葉片6的入口角0,[參閲第二(b)圖]，當考慮 風W2的方向轉換的容易程度時，雖然以較小為好，但由 於過小時會使相鄰兩回流通道葉片6之間的通道寬度變小， 通氣阻力增加，所以不希望如此。於是，入口角大致以 2〇 15-30°為宜。在本實施例中，入口角01設定為約22。。 在考慮擴壓·器2的成型模塑時，若回流通道葉片6的 間隔G狹窄，則模型的葉片（即，與相鄭兩回流通道葉片6 之間的凹部互補的凸部）變細，不能充分保證模具的強度， 其結果是縮短了模具的壽命。 ，8· 本紙張尺度適用中國國家揉隼（CNS ) A4規樁（210X297公釐） (請先閲讀背面之注意事項再填寫本頁) 裝- k 4343 7 0^. A7 B7 五、發明説明（） 因此，回流通道8，在不與渦旋殼體3的内周面發生 密接的情況下，存在有作為環狀間陈的第一空間部11。在 渦旋殼體3的内周面處，使來自中心部通過渦旋通道7流 向外周的風W2在第一空間部η逆轉換方向（U型寶）成為 5軸向（參閱第一圖 >，轉過U型弩的風W2不僅流入緊挨著 的回流通道8，還可自由順利地流入回流通道8中並被導 向中心部。這樣，如第二(b)圖中所示，由於能使回流通道 葉片6的入口角<9ι加大，確保加大回流通道8的間陈G， 故可以降低通氣阻力，提高送風效率》又由於能加厚所述 10 模具的葉片，故能提高模具的強度》 還有，在本實施例中，通過使渦旋葉片5的外周端位 於離上述渦旋殼體3的内周面約i_3mm内側而在該满旋 葉片5舆渦旋殼雜3之間形成環狀的第二空間12。 就是說，在使渦旋葉片5的前端部分5a與渦旋殼艘3 15的内周面密接方面，雖然可以使渦旋葉片5的長度變得更 長，但在密接的情況下，由於由渦旋葉片5與渦旋毅嫌3 内周面所形成的大體三角形部分[參閱第二(b)囷】所構成的 尉向通遒消失，在該處發生風的停滞（紊流)，故送風性能 下降。 經濟部中央標準局貝工消費合作社印52 20 渦旋通道7的出口角02相對於渦旋殼體3的内阉面 立起加大）時，風W2沖擊在渦旋殼體3上，引起損失〇 反過來，在使出口角02放倒（02變小）時，渦旋葉片5過 分地變長，難於實現渦旋通道7順利擴大《而且，渴旋通 道7的出口角Θ2變成非常尖銳的刀刃時，在生產上也造 -9- 本紙張尺度適用中闺國家榡準（CMS ) A4规格（2丨0X297公釐） A7 B7 五、發明説明（) 成問題。 在本實施例中，由於使用了比現有技術更長的渦旋葉 片5，即使渴旋葉片5有—定的縮小（约i-3inm縮小）也能 確保比過去的满旋葉片更高的性能，故可以使渦旋葉片5 5的外周端不與渦旋殼體3的内周面3密接而留有若干間隙， 以形成環狀的第二空間部12 »然而，渦旋葉片5相對於渦 旋殼體3的内周面並不成為相切狀態（相切的圓弧形狀）， 而是保持一定角度。這樣，流過渦旋通道7的風\V2的一 部分就依渦旋葉片5與渴旋殼體内周面所形成的環狀第二 10空間12而周向流動，使風W2可不停滯而順利地流動，能 防止因紊流引起的性能降低。 此外，以從渦旋葉片5到渦旋殼體3的環狀的第二空 間部12作為渦旋通道的一部分，而且使渦旋葉片5不與 渦旋殼體3的内周面相切而是保持一定的角度，這種結構 15 使得渦旋葉片5的前端部分5a即使不成為刀刀般的形狀 也能使風充分順利地流動，故前端部分5a可以成為圓形 (參閲第六圖）。故在生產上不會發生問題。 經濟部中央梯準局貝工消費合作社印製 (請先閲讀背面之注意事項再填寫本頁) 進而，在本實施例中，如第六闽中所示，其回流通道 葉片6的前端6b設置成與渦旋葉片5的曲線形的外周端 20 一致或者位於外周端内側的位置上。通常，流過渦旋通道 7的風在流入回流通道8時，風w2的大部分會如第七 圖中所示，借助於在内側的渦旋葉片5上整體構成的回流 通道葉片6的突出前端6b而強制地流入回流通道8時的 強制方向轉换，就會產生風量及風壓損失（風損），但若配 -10· 本紙張尺度適用中國國家標準（CNS ) A4ii格（210X297公釐） 4343 7 0>- .7 A7 B7 五、發明説明（） 置第六圖所示的前端6b,就可以防止風損。 於是，如第二(b)圖中所示，從渦旋通道7流出的風W2, 沿渦旋殼體3的内周轉向，不僅流入緊挨著的回流通道8, 也還流入相鄰的回流通道8，因此，可使整個整流通道變 5 長，提高送風效率。此外，由於使回流通道葉片6的角度 與風的流入角度相合形成比通常大的入口角0,，於是就能 使回流通道8的間隙G更大，能減小通氣阻力，提高送風 效率，同時還可以使模具的強度提高。還有，由於失去了 沒有回流通道8的頂脊部分(如第七圖中所示，回流通道葉 10 片6前端部分6b突出時的部分8b)，可以防止因逆流而產 生的性能下降》 在本實施例中，由於使渦旋葉片5的數目與回流通道 葉片6的數目相同，就能使渦旋葉片5與回流通道葉片6 以1對1地構成，通過各渦旋通道7的風W2同樣地在渦 15 旋殼體3内·側與回流通道8之間排出而順利地流入回流通 道8，故能防止因風壓的強弱而引起的紊流。與此同時，也 能防止因紊流而引起的噪音增大。 經濟部中央標隼局貝工消費合作社印裂 (請先閲讀背面之注意事項再填寫本頁) 此外，在考慮用模具製造擴壓器2的模具時，例如在 渦旋葉片5及回流通道葉片6分別為23片的情況下，首 20 先分別對1片葉片的形狀對CAD或NC加工機等進行編 程，然後，以360° /23的轉角繞擴壓器2的軸心線依次旋 轉，就能很容易地完成加工模具的編程，從而能實現縮短 模具設計及模具加工時間，並簡化其維護。 渦旋葉片5及回流通道葉片6的片數，如果太少則噪 本紙張尺度適用中國國家標準（CNS ) A4规格（2Ϊ0Χ297公釐）The Ministry of Economic Affairs of the People's Republic of China must be printed for the employee consumer cooperative ^ 4343 70 7. Description of the invention () Open state "Moreover, the front end portion 5a of the thirsty blade 5 outside the vortex channel 7 without the bottom wall portion 4 is located at The state of leaving the motor base F. However, even if the scroll vane 5 is extended to the vicinity of the inner peripheral surface of the scroll case 3 so that the annular space between the scroll vane 5 and the inner peripheral surface of the scroll case 3 disappears or becomes smaller, W2 can pass through the vortex. The first space portion 11 inside the spiral housing 3 can sufficiently ensure the passage area of the inflow return passage 8, so that the external dimensions of the electric fan can be increased, and the scroll passage 7 can be lengthened to the maximum diameter of the motor. As a result, the air supply efficiency can be improved. In addition, although the wind W2 blown from the outlet end of the scroll channel 7 is open at the pumping direction 10, the reverse channel wall of the scroll channel 7 still exists, relative to the shaft. In the vertical direction, the vortex blades 5 can be used for rectification. At the beginning of pumping, because the front end portion 5a of the vortex blades 5 is suspended in the air, the vortex blades 5 will not block the passage of the wind W2. Reversing smoothly into the axial direction, and being introduced into the return channel 8, the air supply rate can be increased by 15%. The inlet angle 0 of the return channel blade 6 [see the second (b) figure], when considering the ease of the direction change of the wind W2, although it is better to be smaller, it will cause two adjacent return channels to be too small because it is too small. The width of the passage between the blades 6 becomes smaller and the ventilation resistance increases, so this is not desirable. Therefore, the entrance angle is preferably about 20-15-30 °. In the present embodiment, the entrance angle 01 is set to about 22. . When considering the molding and molding of the diffuser 2, if the interval G of the return channel blades 6 is narrow, the blades of the model (that is, convex portions complementary to the recesses between the two return channel blades 6 of the Zhengzheng) become thinner. The strength of the mold cannot be sufficiently ensured, and as a result, the life of the mold is shortened. 8 · This paper size is applicable to the Chinese national rubbing (CNS) A4 gauge pile (210X297 mm) (Please read the precautions on the back before filling out this page) Pack-k 4343 7 0 ^. A7 B7 V. Description of the invention ( Therefore, the return passage 8 has a first space portion 11 as a ring-shaped space without being in close contact with the inner peripheral surface of the scroll case 3. At the inner peripheral surface of the scroll housing 3, the wind W2 flowing from the central portion to the outer periphery through the vortex channel 7 is turned in the reverse direction (U-shaped treasure) in the first space portion η to a 5-axis direction (see the first figure >);, The wind W2 turning the U-shaped crossbow not only flows into the adjacent return channel 8 but also flows freely and smoothly into the return channel 8 and is guided to the center. Thus, as shown in the second (b) diagram, because The inlet angle of the return channel blade 6 can be increased < 9ι, and the interval G of the return channel 8 can be increased, so the ventilation resistance can be reduced and the air supply efficiency can be increased. Also, since the blade of the 10 mold can be thickened, it can Increasing the strength of the mold >> Also, in this embodiment, the outer peripheral end of the scroll blade 5 is located inside i_3 mm from the inner peripheral surface of the scroll casing 3, so that the scroll casing is mixed with the scroll blade 5 A ring-shaped second space 12 is formed between 3, that is, the front end portion 5a of the scroll blade 5 is in close contact with the inner peripheral surface of the scroll shell 3 15, although the length of the scroll blade 5 can be changed to It is longer, but in the case of close contact, it is shaped by the inner peripheral surface of the vortex blade 5 and the vortex 3 The generally triangular part of [see second (b) 囷] disappears, and the wind stagnation (turbulence) occurs there, so the air supply performance is reduced. 20 When the exit angle 02 of the scroll channel 7 rises up relative to the inner surface of the scroll housing 3), the wind W2 impinges on the scroll housing 3, causing a loss. In turn, the outlet angle 02 is released. When inverted (02 becomes smaller), the scroll blade 5 becomes excessively long, making it difficult to achieve a smooth expansion of the scroll channel 7. Moreover, when the exit angle Θ2 of the thirsty swirl channel 7 becomes a very sharp blade, it is also made -9 in production. -This paper size is applicable to the China National Standard (CMS) A4 specification (2 丨 0X297mm) A7 B7 5. The description of the invention () is a problem. In this embodiment, since a scroll blade 5 longer than the prior art is used, even if the thirsty spiral blade 5 is reduced to a certain extent (about i-3inm reduction), it can ensure higher performance than the past full-rotation blades. Therefore, the outer peripheral end of the scroll blade 55 can not be in close contact with the inner peripheral surface 3 of the scroll casing 3, leaving a few gaps to form a ring-shaped second space portion 12. However, the scroll blade 5 is relatively The inner peripheral surface of the scroll case 3 does not become a tangent state (tangent arc shape), but maintains a certain angle. In this way, a part of the wind \ V2 flowing through the vortex channel 7 flows in the circumferential direction according to the annular second 10 space 12 formed by the vortex blade 5 and the inner peripheral surface of the thirsty spiral casing, so that the wind W2 can be smooth without stagnation. Ground flow can prevent performance degradation caused by turbulence. In addition, the annular second space portion 12 from the scroll blade 5 to the scroll casing 3 is used as a part of the scroll passage, and the scroll blade 5 is not tangent to the inner peripheral surface of the scroll casing 3 but Maintaining a certain angle, this structure 15 enables the front end portion 5a of the scroll blade 5 to make the wind flow smoothly even if it does not have a knife-like shape, so the front end portion 5a can be round (see the sixth figure) . Therefore, no problem occurs in production. Printed by the Central Laboratories of the Ministry of Economic Affairs, Shellfish Consumer Cooperative (please read the precautions on the back before filling this page). Further, in this embodiment, as shown in the sixth embodiment, the front end 6b of the return channel blade 6 is set The outer peripheral end 20 conforms to the curved shape of the scroll blade 5 or is located on the inner side of the outer peripheral end. Generally, when the wind flowing through the vortex channel 7 flows into the return channel 8, most of the wind w2 will be as shown in the seventh figure, by means of the protrusion of the return channel blade 6 integrally formed on the inner scroll blade 5 The forced direction change when the front end 6b forcedly flows into the return channel 8 will generate air volume and wind pressure loss (wind loss), but if it is equipped with -10 · This paper size applies the Chinese National Standard (CNS) A4ii grid (210X297 mm) ) 4343 7 0 >-.7 A7 B7 V. Description of the invention () By placing the front end 6b shown in the sixth figure, wind damage can be prevented. Then, as shown in the second (b) diagram, the wind W2 flowing out of the scroll channel 7 turns along the inner periphery of the scroll casing 3, and flows not only into the adjacent return channel 8 but also into the adjacent return channel 8. The return channel 8 can therefore lengthen the entire rectifying channel 5 and improve the air supply efficiency. In addition, since the angle of the return passage blade 6 and the inflow angle of the wind are combined to form a larger entrance angle 0 than usual, the gap G of the return passage 8 can be made larger, the ventilation resistance can be reduced, and the air supply efficiency can be improved. It can also increase the strength of the mold. In addition, since the top ridge portion without the return channel 8 (the portion 8b when the front end portion 6b of the return channel leaf 10 is projected as shown in the seventh figure) can be prevented, performance degradation due to backflow can be prevented. In this embodiment, since the number of the vortex blades 5 and the number of the return channel blades 6 are the same, the vortex blades 5 and the return channel blades 6 can be configured one to one, and the wind W2 passing through the vortex channels 7 Similarly, it is discharged between the inside and the side of the scroll housing 3 and the return passage 8 and smoothly flows into the return passage 8, so that turbulence caused by the strength of the wind pressure can be prevented. At the same time, noise increase due to turbulence can be prevented. Printed by the Central Bureau of Standards, Ministry of Economic Affairs, Shellfish Consumer Cooperative (please read the precautions on the back before filling out this page) In addition, when considering the use of molds to manufacture the mold for the diffuser 2, such as the scroll blade 5 and the return channel blade In the case of 23 pieces each, the first 20 first program the shape of a blade to CAD or NC processing machine, etc., and then sequentially rotate around the axis of the diffuser 2 at a rotation angle of 360 ° / 23. The programming of the processing mold can be easily completed, which can shorten the mold design and mold processing time and simplify its maintenance. The number of the scroll blades 5 and the return channel blades 6, if it is too small, it will be noisy. The paper size applies the Chinese National Standard (CNS) A4 specification (2Ϊ0 × 297 mm).
Ϊ343 7 0S Α7 Β7 五、發明説明（） 音增大，整流不充分性能下降，而如果太多則通氣阻力增 大。 本實施例的渦旋葉片5與回流通道葉片6是無傾斜通 道(在底壁部4的厚度方向上傾斜的渦旋通道7或回流通 5 道8)的二維形狀，由於回流通道8入口角01變大，其片數 以較多為宜。 若考慮上述各點，以及賁驗結果，則在性能與噪音等 方面，渦旋葉片5及回流通道葉片6以設定為約17-23片 為佳。 10 本發明的效果為，若使用本發明，則可使渦旋葉片向 外侧延伸，而且可以在回流通道葉片的外周側上確保第一 空間部，藉此可使從渦旋通道流入回流通道的風順利地流 動，從而可提高送風效率。 (請先閲讀背面之注意事項再填寫本頁) 經濟部中央標準局員工消費合作社印紮 2- 本紙張尺度適用中國國家榇準（CNS > A4規格（210X297公釐） 43^3 A7 B7 五、發明説明（ 10 15 圖式之簡單說明： 第一圖是示出本發明一實施例的電動鼓風機的剖面說 明圖β 第二圖是第一圖中擴壓器的俯視囷；第二（a)圖是從上 面看的擴壓器圖；第二(b)圖是從下面看的擴壓器圖。 第三圖是第一圖中擴壓器剖視圖。 第四圖是從突設有渦旋葉片侧所見的第一圖的擴壓器 透視圖》 第五圖是從突設有回流通道葉片側所見的第一圖的擴 壓器透視圖。 第六圖是第一圖渦旋葉片前端部分的放大圖》 第七圖是作為第六圖的比較例，表示回流通道葉片自 渦旋葉片向外突出狀態的說明圖》 第八圖是現有技術擴壓器的俯視圖；第八(a)圖是從上 面看擴壓器圖；第八(b)圖是從下面看擴壓器囷。 第九圖是第八圖中擴壓器的俯視圖》 (锖先聞讀背面之注項再填寫本頁) 裝· — 丁 經濟部中央標準局負工消費合作社印製 20 圖號說明： 1葉輪 4底壁部 7渦旋通道 2擴壓器 5渦旋葉片 8回流通道 3渦旋殼體 6回流通道葉片 11第一空間部 13- 本紙張尺度適用中國國家標準（CNS ) Α4规格（210X297公釐）Ϊ343 7 0S Α7 Β7 V. Description of the invention () The sound increases, the performance of the rectification is insufficient, and if too much, the ventilation resistance increases. The vortex vane 5 and the return passage vane 6 of this embodiment are two-dimensional shapes of the non-inclined passage (the vortex passage 7 inclined in the thickness direction of the bottom wall portion 4 or the return passage 5 8). The angle 01 becomes larger, and the number of pieces is preferably larger. In consideration of the above points and test results, in terms of performance and noise, the scroll blades 5 and the return channel blades 6 are preferably set to about 17-23 pieces. 10 The effect of the present invention is that if the present invention is used, the scroll blades can be extended to the outside, and the first space portion can be secured on the outer peripheral side of the return channel blade, thereby allowing the flow from the scroll channel into the return channel. The wind flows smoothly, which improves the efficiency of air supply. (Please read the precautions on the back before filling out this page) Stamped by the Consumer Cooperatives of the Central Bureau of Standards of the Ministry of Economic Affairs 2- This paper size applies to the Chinese National Standard (CNS > A4 size (210X297 mm) 43 ^ 3 A7 B7 5 Brief description of the invention (10 15): The first diagram is a cross-sectional explanatory diagram showing an electric blower according to an embodiment of the present invention. Β The second diagram is a top view of the diffuser in the first diagram. The second (a Figure) is a diffuser view from above; Figure 2 (b) is a diffuser view from below. Figure 3 is a cross-sectional view of the diffuser from Figure 1. Perspective view of the diffuser of the first picture seen from the side of the rotor blade. The fifth view is a perspective view of the diffuser of the first picture seen from the side of the blade where the return passage is provided. Partial enlarged view. The seventh view is a comparative example of the sixth view, and is an explanatory view showing a state where the return passage blade protrudes outward from the vortex blade. The eighth view is a plan view of a prior art diffuser; the eighth (a) The figure shows the diffuser from above; the eighth (b) figure shows the diffuser from below. Figure 9 is the top view of the diffuser in Figure 8. (锖 First read the notes on the back and then fill out this page.) Installation · — Ding printed by the Central Standards Bureau of the Ministry of Economic Affairs and Consumer Cooperatives 20 Drawing number description: 1 impeller 4 Bottom wall part 7 vortex channel 2 diffuser 5 vortex blade 8 return channel 3 vortex casing 6 return channel blade 11 first space portion 13- This paper size applies to China National Standard (CNS) Α4 size (210X297 mm) )