1308197 九、發明說明： 【發明所屬之技術領域】 本發明係有關離心風扇的結構，尤其是指一種葉輪邊 緣與風扇殼體間形成等間距的氣體流道與上下不對稱之流 道空間之風扇殼體設計，使離心風扇具有低噪音與高流量 之特點，進而利用該離心風扇形成可吸塵與集塵的模組。 【先前技術】 自動吸塵器為一全自動之清潔裝置，有別於傳統的吸 塵器以及掃除工具，可自行在一固定之區域内完成清潔工 作，以取代傳統人工操作之吸塵器及其他的清潔工具。自 動吸塵器在設定清掃模式以後，便自動進行地面清掃之功 能，並且可以閃避室内之家具或者是障礙物以完成清潔之 工作，此外自動吸塵器更可以清理一般難以清掃之死角。 雖然自動吸塵器可對於未來之家庭生活可以帶來便 利，然而這種自走式的自動吸塵器由於其所需之電源並非 來自交流電，並且由於内部空間的限制，並無法選擇如傳 統式吸塵器所使用的空氣壓縮機，因此在有限的電源供應 下，惟有良好的離心風扇才能展現其優異之性能。此外， 離心風扇相較於傳統之空氣壓縮機具有低噪音之優點。 為了讓離心風扇可以運作的更流暢，現今所考量之設 計重點在於如何設計低噪音、壓差大以及大流量之特性。 在習用技術中，如中華民國專利公告號M246471號所揭露 的為一離心風扇結構以及使用該結構之吸塵器。不過該技 6 1308197 一進氣口以及一出氣口；一葉輪，其係設置於該容置空間 内，該葉輪之邊緣與該殼體側壁間形成具有相等流道寬度 之一氣體流道；以及一驅動裝置，其係與該葉輪相連接以 驅動該葉輪轉動。 較佳的是，該葉輪之軸向中心截面線將該容置空間分 成一第一空間與一第二空間，該第一空間與該第二空間係 不對稱。其中該第二空間更延伸有一螺旋流道與該出氣口 相連通。該螺旋流道之截面積由該螺旋流道之入口到該出 氣口而逐漸增加。 較佳的是，該殼體更包括有：一上殼體，其係具有該 進氣口；以及一下殼體，其係與該上殼體相連接，該下殼 體更具有該出氣口。 較佳的是，該葉輪係可選擇為單列翼形葉片以及雙列 翼形葉片其中之一者。 為的達到上述之目的，本發明更提供一種離心風扇， 其係包含有：一殼體，其係具有一容置空間，該殼體更具 有一進氣口以及一出氣口；一葉輪，其係設置於該容置空 間内，該葉輪之轴向中心截面線將該容置空間分成一第一 空間與一第二空間，該第一空間與該第二空間係不對稱； 以及一驅動裝置，其係與該葉輪相連接以驅動該葉輪轉動。 為了達到上述之目的，本發明更提供一種集塵盒模 組，其係包含有：一罩體，其係具有一凹槽，該罩體之一 側上開設有與該凹槽連通之一槽孔，該罩體更具有與該凹 槽相連通之一通孔；一吸塵罩，其係與該槽孔相連接；一 盒體，其係設置於該凹槽内，該盒體具有與該通孔以及該 8 1308197 槽孔相連通之一集塵空間；以及一離心風扇，其係設置於 該罩體上，該離心風扇更具有：一殼體，殼體，其係具有 一容置空間，該殼體更具有一進氣口以及一出氣口，該進 氣口係與該通孔相連通；一葉輪，其係設置於該容置空間 内，該葉輪之邊緣與該殼體側壁間形成具有相等流道寬度 之一氣體流道；以及一驅動裝置，其係與該葉輪相連接以 驅動該葉輪轉動。 較佳的是，該離心風扇與該通孔間更具有一濾網。 較佳的是，該吸塵罩更具有一滾輪；該滾輪上更具有 刷毛。 較佳的是，該凹槽兩壁上更具有滑槽，該盒體之兩侧 上更具有可與該滑槽相滑靠之凸部，使該盒體可於該凹槽 上滑動。 為的達到上述之目的，本發明更提供一種集塵盒模 組，其係包含有：一罩體，其係具有一凹槽，該罩體之一 側上開設有與該凹槽連通之一槽孔，該罩體更具有與該凹 槽相連通之一通孔；一吸塵罩，其係與該槽孔相連接；一 盒體，其係設置於該凹槽内，該盒體具有與該通孔以及該 槽孔相連通之一集塵空間；以及一離心風扇，其係設置於 該罩體上，該離心風扇更具有：一殼體，其係具有一容置 空間，該殼體更具有與該通孔相連通之一進氣口以及一出 氣口； 一葉輪，其係設置於該容置空間内，該葉輪之軸向 中心截面線將該容置空間分成一第一空間與一第二空間， 該第一空間與該第二空間係不對稱；以及一驅動裝置，其 係與該葉輪相連接以驅動該葉輪轉動。 9 1308197 【實施方式】 為使貴審查委員能對本發明之特徵、目的及功能有 更進-步的認知與瞭解，下文特將本發明之系統的相關細 部結構以及設計的理念原由進行說明，以使得審查委員可 以了解本發明之特點，詳細說明陳述如下：1308197 IX. Description of the Invention: [Technical Field] The present invention relates to a structure of a centrifugal fan, and more particularly to a fan that forms an equally spaced gas flow path between the edge of the impeller and the fan casing and an asymmetrical asymmetric flow path space. The shell design makes the centrifugal fan have the characteristics of low noise and high flow rate, and then the centrifugal fan is used to form a module capable of collecting and collecting dust. [Prior Art] The automatic vacuum cleaner is a fully automatic cleaning device that, unlike conventional vacuum cleaners and sweeping tools, can perform cleaning work in a fixed area to replace traditional manual vacuum cleaners and other cleaning tools. The automatic vacuum cleaner automatically performs the ground cleaning function after setting the cleaning mode, and can avoid the furniture or obstacles in the room to complete the cleaning work. In addition, the automatic vacuum cleaner can clean the dead corners that are difficult to clean. Although the automatic vacuum cleaner can bring convenience to the future family life, the self-propelled automatic vacuum cleaner does not have the power supply from the alternating current, and because of the limitation of the internal space, it cannot be selected as the conventional vacuum cleaner. Air compressors, so with a limited power supply, only a good centrifugal fan can show its excellent performance. In addition, centrifugal fans have the advantage of low noise compared to conventional air compressors. In order to make the centrifugal fan work more smoothly, the design considerations today focus on how to design low noise, large differential pressure and large flow characteristics. In the conventional technology, as disclosed in the Republic of China Patent Publication No. M246471, a centrifugal fan structure and a vacuum cleaner using the same are disclosed. However, the technology 6 1308197 is an air inlet and an air outlet; an impeller is disposed in the accommodating space, and a gas flow path having one of the same flow path width is formed between the edge of the impeller and the side wall of the housing; A drive unit is coupled to the impeller to drive the impeller to rotate. Preferably, the axial center section line of the impeller divides the accommodating space into a first space and a second space, and the first space is asymmetric with the second space. The second space further has a spiral flow path communicating with the air outlet. The cross-sectional area of the spiral flow path is gradually increased from the inlet of the spiral flow path to the gas outlet. Preferably, the housing further includes: an upper housing having the air inlet; and a lower housing coupled to the upper housing, the lower housing further having the air outlet. Preferably, the impeller is selectable as one of a single row of wing shaped vanes and a double row of vane shaped vanes. In order to achieve the above object, the present invention further provides a centrifugal fan, comprising: a housing having an accommodating space, the housing further having an air inlet and an air outlet; an impeller; Is disposed in the accommodating space, the axial center section line of the impeller divides the accommodating space into a first space and a second space, the first space is asymmetric with the second space; and a driving device It is connected to the impeller to drive the impeller to rotate. In order to achieve the above object, the present invention further provides a dust box module, comprising: a cover body having a groove, a side of the cover body having a slot communicating with the groove a hole, the cover body further has a through hole communicating with the groove; a dust collecting cover connected to the slot; a box body disposed in the groove, the box body having the same a hole and the 8 1308197 slot are connected to one of the dust collecting spaces; and a centrifugal fan is disposed on the cover body, the centrifugal fan further has: a casing, the casing having an accommodation space The housing further has an air inlet and an air outlet, the air inlet is in communication with the through hole; an impeller is disposed in the receiving space, and an edge of the impeller is formed between the edge of the housing and the sidewall of the housing a gas flow path having one of the equal flow path widths; and a driving device coupled to the impeller to drive the impeller to rotate. Preferably, there is a filter screen between the centrifugal fan and the through hole. Preferably, the suction hood further has a roller; the roller further has bristles. Preferably, the two walls of the groove further have a sliding groove, and the two sides of the casing further have a convex portion slidable with the sliding groove, so that the casing can slide on the groove. In order to achieve the above object, the present invention further provides a dust box module, comprising: a cover body having a groove, one side of the cover body is openly connected to the groove a slot, the cover body further has a through hole communicating with the groove; a dust collecting cover connected to the slot; a box body disposed in the groove, the box body having the same The through hole and the slot are connected to one of the dust collecting spaces; and a centrifugal fan is disposed on the cover body, the centrifugal fan further has: a casing having an accommodating space, the casing further An air inlet and an air outlet connected to the through hole; an impeller disposed in the accommodating space, wherein the axial center section line of the impeller divides the accommodating space into a first space and a a second space, the first space being asymmetric with the second space; and a driving device coupled to the impeller to drive the impeller to rotate. 9 1308197 [Embodiment] In order to enable the reviewing committee to have a further understanding and understanding of the features, objects and functions of the present invention, the detailed structure of the system of the present invention and the concept of the design are explained below. The review board member can understand the characteristics of the present invention, and the detailed explanation is as follows:
請參閱圖-A以及圖-B所示，其中圖—A係為本發 明之離心風扇較佳實施例立體分解示意圖；圖一 B係為本 發明之離心風扇較佳實施例組合示意圖。該風扇裝置（包 括有一殼體10、一葉輪Η以及一驅動裝置14。該殼體ι〇 係由一上殼體101與一下殼體1〇2所構成。有別於傳統之 螺旋漸開、線所形成之殼體，該上殼體1G1與下殼體1⑽組 成之合置工間之軸方向截面形狀為圓形而非習用技術之截 面形狀。該上殼體101之中心位置上方具有一進氣口 ’該下殼體1〇2之-側邊上具有一出氣口 1〇21。 該葉輪11其係設置於該容置空間内。該葉輪u係具 有-餘11〇’缺110±方具有複數個葉片ιΐ3。在該複 ::片113上方設置有一頂板⑴。該複數個葉片113 Γ 11G上之排列方式可為如圖二A或圖二B所示之 二二式。請參關二A所*，該葉輪u之排列方式可以 ;;有早列％形排列之葉片⑴。而如圖二13所示之葉輪 a H3aM13b^,i〇#E7Referring to Figure-A and Figure-B, wherein Figure A is a perspective exploded view of a preferred embodiment of the centrifugal fan of the present invention; Figure 1B is a schematic view of a preferred embodiment of the centrifugal fan of the present invention. The fan device (including a casing 10, an impeller cymbal and a driving device 14. The casing 〇 is composed of an upper casing 101 and a lower casing 〇2. Different from the traditional spiral involute, The housing formed by the wire, the axial direction cross-sectional shape of the joint chamber composed of the upper casing 1G1 and the lower casing 1 (10) is circular instead of the cross-sectional shape of the prior art. The upper casing 101 has a top position at the center. The air inlet 'the side of the lower casing 1 〇 2 has an air outlet 1 〇 21 . The impeller 11 is disposed in the accommodating space. The impeller u has a residual 11 〇 ' lack 110 ± The square has a plurality of blades ι ΐ 3. A top plate (1) is disposed above the slab: 113. The arrangement of the plurality of blades 113 Γ 11G may be the second type as shown in FIG. 2A or 2B. Guan Er A*, the arrangement of the impeller u can be;; there are early-arranged %-arranged blades (1), and the impeller a H3aM13b^, i〇#E7 as shown in Fig.
巧圖一 A所不，該驅動罟uM 衣置U係错由—定位銷.12與一轉 接板13與該葉輪u相連接，以提供轉動動力給該華輪n。 接下來說明該葉輪11於該殼體10内之配置位置。請 10 1308197 ^圖^A所示，該圖係為本發明之離心風扇俯視示意 费中可以了*，由於該殼體1〇 β之容置空間其轴向 :面為圓形，因此該葉輪11之邊緣與該殼體1〇側壁間彤 成具有相等流道寬度D之-氣體流道1〇3。請參閱圖三$ 所不’該®係為本發明之離心風扇側視剖面示意圖。該葉 輪^體之軸向中心截面線8上方與該殼體1G内壁形成二第 工間A1 ’而该葉輪之軸向中心截面線8下方與該殼體1 〇 内壁形成一第二空間A2。有別於習用技術，本發明之特徵 在於该第二空間A2與該第一空間A1不對稱。如圖—B以 及圖三B所示，在該下殼體102於該第二空間A2上具有一 螺旋流道1022。㈣旋流道刪之截面積由該螺旋流道 1022之入口到该出氣口 1〇21而逐漸增加。以圖三b中之 W22a表示該螺旋流道1022之一截面，而i〇22b表示該螺 方疋流道1022之另一截面，從圖中可知1〇22a之面積大於 1022b之面積。 、、 由於本發明之殼體設計，使得本發明之殼體並無明顯 务舌端（casing tongue)，因此大部分的氣流會經由葉輪 Π下半部流道由出口排出，以至於進氣與出氣之間並不會 因為回流而產生氣流噪音。請參閱圖四所示，該圖係為本 發明之離心風扇與其他習用技術之風扇的流量_壓力曲線 比較曲線圖。其中曲線9〇為本發明之設計，編號為msl II、 曲線91為中華民國專利M246471 (RV-10)之離心風扇、 曲線92為歐洲專利EP0943808 (Karcher)，另外曲線93 代表產品I-robot離心風扇性能曲線。由離心風扇之性能 曲線測試可以得知，在相同之操作點上，本發明之性能曲 1308197 線90優於曲線91、92、93，而整體噪音亦與歐洲專利 EP0943808 (Karcher)同級而超過中華民國專利M246471 (RV-10)之離心風扇10dB以上。如此可使得吸塵器整體 之吸力可達到優越的水準並保持低噪音的運轉。 由於前述之離心風扇具有壓差大、高流量之優點，因 此本發明利用該離心風扇而提供一集塵盒模組。請參閱圖 五所示，該圖係為本發明之集塵盒模組之較佳實施例組合 示意圖。該集塵盒模組2包括有一離心風扇20與一集塵盒 21。該離心風扇之結構係如前所述。請參閱圖六A以及圖 六B所示，該圖係為本發明集塵盒較佳實施例示意圖。該 集塵盒21更包括一罩體210、一吸塵罩212以及一盒體 211。該罩體210具有一凹槽2104，該罩體210之一側上 開設有與該凹槽2104連通之一槽孔2101，該罩體210更 具有與該凹槽2104相連通之一通孔2102，該通孔2102係 與該離心風扇21之進氣口相連通。該通孔2102與該離心 風扇20間更可設置抽取式之一過濾網。 該盒體211係設置於該凹槽2104内，該盒體211具有 與該通孔2102以及該槽孔2101相連通之一集塵空間 2110。該集塵空間2110可放式一集塵袋（圖中未示），該盒 體211可類似抽屜式的方式容置於該凹槽内，如要更換集 塵袋，則可以將該盒體211抽出，然後更換集塵袋即可。 請參閱圖七所示，該圖係為本發明之吸塵罩較佳實施例示 意圖。該吸塵罩212具有一進氣口 2121以及一出氣口 2120,該出氣口 2120係與該罩體210之槽孔2101相連通。 該吸塵罩212之進氣口 2121端更可以設置一滾輪2122， 12 1308197 滚輪上可以設置刷毛。 在本實施例中爲了要使氣體的流道平順，在吸塵器（圖 中未示）底盤的進氣口與集塵盒21透過該吸塵罩212相連 接，且集塵盒21之罩體210之進氣槽孔2101開口部位在 該罩體210之侧邊，而非底面，如此便可以不用顧慮集塵 之效能而要刻意的去扭曲氣體流道而造成氣流噪音。也因 為如此集塵盒罩體210及盒體211之結構設計成抽屜抽取 之方式，不但可以降低噪音，更可方便灰塵之清理以及濾 網之更換。 唯以上所述者，僅為本發明之較佳實施例，當不能以 之限制本發明範圍。即大凡依本發明申請專利範圍所做之 均等變化及修飾，仍將不失本發明之要義所在，故都應視 為本發明的進一步實施狀況。 综合上述，本發明提供之離心風扇以及使用該離心風 扇之集塵盒模組，壓差大、高流量以及抑制噪音之優點。 足以滿足業界之需求，進而提高該產業之競爭力，誠已符 合發明專利法所規定申請發明所需具備之要件，故爰依法 呈提發明專利之申請，謹請貴審查委員允撥時間惠予審 視，並賜準專利為禱。 【圖式簡早說明】 圖一 A係為本發明之離心風扇較佳實施例立體分解示意 圖。 圖一 B係為本發明之離心風扇較佳實施例組合示意圖。 13 1308197 • 圖二A、B係為本發明之離心風扇葉輪俯視示意圖。 圖三A係為本發明之離心風扇俯視示意圖。 ， 圖三B係為本發明之離心風扇侧視剖面示意圖。 圖四係為本發明之離心風扇與其他習用技術之風扇的流量 -壓力曲線比較曲線圖。 圖五係為本發明之集塵盒模組之較佳實施例組合示意圖。 圖六A係為本發明集塵盒之較佳實施例組合示意圖。 φ 圖六B係為本發明集塵盒之較佳實施例分解示意圖。 圖七係為本發明之吸塵罩較佳實施例示意圖。 ' 【主要元件符號說明】 1 -離心風扇 10-殼體 101-上殼體 1011-進氣口 • 102-下殼體 1021- 出氣口 1022- 螺旋流道 1022a、1022b-截面 _ 103-氣體流道 11、11a-葉輪 110 -底板 111- 頂版 112- 進氣端 14 1308197 113、113a、113b-葉片 12 _定位銷 、 13-轉接板 14-驅動裝置 2-集塵盒模組 20-離心風扇 21 -集塵盒 210-罩體 • 210卜槽孔 2102- 通孔 2103- 固定孔 2104- 凹槽 " 2Π-盒體 2110-集塵空間 212-吸塵罩 2120-出氣孔 • 2121-進氣孔 2122-滾輪 8_轴向中心截面線 90、91、92、93-曲線 - A卜第一空間 - A2-第二空間 D-流道寬度 15In the case of A, the drive 罟uM is placed in a U-missing pin. The locating pin 12 is coupled to the impeller u to provide rotational power to the wheel n. Next, the arrangement position of the impeller 11 in the casing 10 will be described. Please refer to Fig. 1A, which is shown in Fig. 2A. The figure is a top view of the centrifugal fan of the present invention. * Because the housing 1 之β accommodates the space in the axial direction: the surface is circular, so the impeller The edge of 11 and the side wall of the casing 1 are twisted into a gas flow path 1〇3 having an equal flow path width D. Please refer to Figure 3 for a view of the side view of the centrifugal fan of the present invention. Above the axial center section line 8 of the impeller body, a second chamber A1' is formed with the inner wall of the casing 1G, and a second space A2 is formed below the axial center section line 8 of the impeller and the inner wall of the casing 1 . Different from the conventional technique, the present invention is characterized in that the second space A2 is asymmetrical with the first space A1. As shown in FIG. 4B and FIG. 3B, the lower casing 102 has a spiral flow path 1022 in the second space A2. (4) The cross-sectional area of the swirling passage is gradually increased from the entrance of the spiral flow passage 1022 to the air outlet 1〇21. A cross section of the spiral flow path 1022 is shown by W22a in Fig. 3b, and i's 22b is another cross section of the spiral flow path 1022. From the figure, the area of 1〇22a is larger than the area of 1022b. Because of the casing design of the present invention, the casing of the present invention has no obvious casing tongue, so most of the airflow is discharged from the outlet through the lower half of the impeller, so that the intake air is Airflow noise is not generated between the exhaust gases due to backflow. Please refer to FIG. 4, which is a flow rate-pressure curve comparison diagram of the centrifugal fan of the present invention and other conventional fans. Curve 9〇 is the design of the invention, the number is msl II, the curve 91 is the centrifugal fan of the Republic of China patent M246471 (RV-10), the curve 92 is the European patent EP0943808 (Karcher), and the curve 93 represents the product I-robot centrifugation. Fan performance curve. It can be known from the performance curve test of the centrifugal fan that, at the same operating point, the performance curve 1308197 line 90 of the present invention is superior to the curves 91, 92, 93, and the overall noise is also in the same level as the European patent EP0943808 (Karcher) and exceeds the Chinese The centrifugal fan of the Republic of China patent M246471 (RV-10) is more than 10dB. This allows the overall suction of the vacuum cleaner to reach a superior level and maintain a low noise operation. Since the centrifugal fan has the advantages of large pressure difference and high flow rate, the present invention provides a dust box module by using the centrifugal fan. Please refer to FIG. 5, which is a schematic diagram of a preferred embodiment of the dust box module of the present invention. The dust box module 2 includes a centrifugal fan 20 and a dust box 21. The structure of the centrifugal fan is as described above. Please refer to FIG. 6A and FIG. 6B, which are schematic views of a preferred embodiment of the dust box of the present invention. The dust box 21 further includes a cover 210, a dust cover 212, and a casing 211. The cover body 210 has a recess 2104. One side of the cover body 210 is provided with a slot 2101 communicating with the recess 2104. The cover 210 further has a through hole 2102 communicating with the recess 2104. The through hole 2102 is in communication with the intake port of the centrifugal fan 21. One of the removable filters can be disposed between the through hole 2102 and the centrifugal fan 20. The casing 211 is disposed in the recess 2104. The casing 211 has a dust collecting space 2110 communicating with the through hole 2102 and the slot 2101. The dust collecting space 2110 can be put into a dust collecting bag (not shown), and the box body 211 can be accommodated in the groove like a drawer type. If the dust collecting bag is to be replaced, the box body can be replaced. Take out 211 and replace the dust bag. Referring to Figure 7, the figure is a preferred embodiment of the dust hood of the present invention. The dust collecting cover 212 has an air inlet 2121 and an air outlet 2120. The air outlet 2120 communicates with the slot 2101 of the cover 210. The air inlet 2121 end of the dust collecting cover 212 can further be provided with a roller 2122, and 12 1308197 can be provided with bristles on the roller. In the present embodiment, in order to smooth the flow path of the gas, the air inlet of the chassis of the vacuum cleaner (not shown) is connected to the dust box 21 through the dust collecting cover 212, and the cover 210 of the dust box 21 is The opening portion of the air inlet slot 2101 is on the side of the cover 210 instead of the bottom surface, so that the gas flow path can be deliberately twisted without causing the dust collecting effect to cause airflow noise. Also, since the structure of the dust box cover 210 and the casing 211 is designed to be drawerd, the noise can be reduced, and the dust can be cleaned and the filter replaced. The above is only the preferred embodiment of the present invention, and the scope of the present invention is not limited thereto. That is, the equivalent changes and modifications made by the present invention in the scope of the present invention will remain without departing from the scope of the present invention, and therefore should be considered as further implementation of the present invention. In summary, the centrifugal fan provided by the present invention and the dust box module using the centrifugal fan have the advantages of large differential pressure, high flow rate, and noise suppression. Sufficient to meet the needs of the industry, and thus enhance the competitiveness of the industry, Cheng has already met the requirements for applying for inventions as stipulated in the invention patent law. Therefore, the application for invention patents is submitted according to law. Please ask the review committee to allow time for review. See and grant patents as prayers. BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1A is a perspective exploded view of a preferred embodiment of a centrifugal fan of the present invention. Figure 1B is a schematic view showing a combination of preferred embodiments of the centrifugal fan of the present invention. 13 1308197 • Fig. 2A and B are schematic top views of the centrifugal fan impeller of the present invention. Figure 3A is a top plan view of the centrifugal fan of the present invention. Figure 3B is a side cross-sectional view of the centrifugal fan of the present invention. Figure 4 is a graph comparing the flow-pressure curve of the centrifugal fan of the present invention and other conventional fans. FIG. 5 is a schematic diagram of a combination of preferred embodiments of the dust box module of the present invention. Figure 6A is a schematic view showing the combination of the preferred embodiment of the dust box of the present invention. φ Figure 6B is an exploded perspective view of a preferred embodiment of the dust box of the present invention. Figure 7 is a schematic view of a preferred embodiment of the dust hood of the present invention. ' [Main component symbol description] 1 - Centrifugal fan 10 - Housing 101 - Upper housing 1011 - Air inlet • 102 - Lower housing 1021 - Air outlet 1022 - Spiral flow path 1022a, 1022b - Section _ 103 - Gas flow Road 11, 11a - impeller 110 - bottom plate 111 - top plate 112 - intake end 14 1308197 113, 113a, 113b - blade 12 _ locating pin, 13 - adapter plate 14 - drive 2 - dust box module 20 - Centrifugal fan 21 - Dust box 210 - Cover • 210 slot 2102 - Through hole 2103 - Fixing hole 2104- Groove " 2Π-Box 2110 - Dust space 212 - Dust cover 2120 - Vents • 2121- Air intake hole 2122 - roller 8 - axial center section line 90, 91, 92, 93 - curve - A Bu first space - A2 - second space D - flow path width 15