201016979 六、發明說明： 【發明所屬之技術領域】 本發明，是有關於電動送風機及具備其的電動吸塵器 【先前技術】 習知的電動吸塵器用的電動送風機，是在一端開口的 0 外殼的開口側，安裝有將軸承收納的托架，在與安裝於從 托架突出的旋轉件軸的離心風扇及托架之間配置擴散器’ 將擴散器及風扇覆蓋的方式將風扇外殼安裝於托架的外周 部。 在外殼中固定有整流子馬達的馬達定子，在反風扇側 的外殻側面設有排氣口。且，在安裝有風扇外殼的托架設 有複數開口，將來自離心風扇的氣流的一部分通過該開口 排出，沿著外殼的外表面導引的方式形成切起部。由此， Φ 藉由在外殼內流動的氣流及在外側流動的氣流，進行整流 子馬達的冷卻（例如專利文獻1參照）。 且，在習知的電動送風機中，在一端開口的外殻的開 口側，安裝有將軸承收納的托架，在托架中具備複數開口 ，將其開口的總面積設爲反風扇側的排氣口總面積的70 〜8 0% ’使開口的外周側的緣部及返回導引的外周端部幾 乎一致’將來自離心風扇的氣流，從開口及排氣口的雙方 排出（例如專利文獻2參照）。 且，在習知的電動送風機中，在一端開口的外殻的開 -5- 201016979 口側，安裝有將軸承收納的托架，在托架設置開口，使從 其開口排出的氣流接觸整流子馬達的電刷支架（例如專利 文獻3參照）。 [專利文獻1]日本特開平3 - 1 05 099號公報 [專利文獻2]日本特開平10-26099號公報 [專利文獻3]日本特開2005-201 1 57號公報 【發明內容】 (本發明所欲解決的課題） 如專利文獻的習知技術的話，從擴散器排出的氣流的 一部分，因爲可以不通過收納有整流子馬達的外殼內部地 排出，所以損失可以減少，可以提高送風機效率。 流動於收納有整流子馬達的外殼內並從反離心風扇側 的排氣口流出的氣流，其冷卻與整流子馬達的特別是溫度 變高的整流子抵接的電刷的作用雖強力，但在專利文獻1 、2中未考慮電刷冷卻。其是因爲，在托架設置複數開口 ，所以使用於馬達內部的冷卻用的風量下降，也因爲在具 有電刷流路上設置開口，所以電刷的冷卻不充分而可能導 致馬達的壽命縮短。 且，在專利文獻3的技術中，將來自開口的氣流與電 刷支架接觸，將電刷間接地冷卻，但是電刷支架及電刷之 間因爲具有空氣層，所以電刷本身的冷卻不充分。 進一步，因爲藉由設置開口，將從離心風扇發生的噪 音從外殼直接朝外部放出，所以具有電動送風機和搭載其 -6- 201016979 的電動吸塵器的噪音會增大的問題。 本發明的目的，是爲了解決如以上的習知的課題，達 成電動機的長壽命化，提高送風機效率。 且，本發明的目的，是一邊減少從離心風扇發生的噪 音，一邊提高電動機的壽命及送風機效率。 進一步，本發明的目的是提供一種電動吸塵器，藉由 使用該電動送風機，提高吸入工作率。 (用以解決課題的手段） 爲了達成上述目的本發明的電動送風機，是具有：設 有旋轉件及固定件的電動機、及與前述旋轉件滑動的至少 一對的電刷部、及一端開口且在內部將前述電動機及前述 電刷部收納的外殼、及設在前述旋轉件的旋轉軸、及被安 裝於該旋轉軸的離心風扇、及將從前述離心風扇被吐出的 風導引至前述外殻內的風路的擴散器、及將前述離心風扇 # 及前述擴散器覆蓋的方式被安裝於前述外殼且在中央部設 有吸入口的風扇外殼，在前述外殻的開口側中，形成有朝 向外周側突出的突出部，在該突出部形成將風排出的開口 部’在由前述固定件外周及前述外殼內徑形成的風路之中 前述電刷位置的風路中不設置前述開口部。 且’爲了達成上述目的本發明的電動送風機，是具有 :設有旋轉件及固定件的電動機、及與前述旋轉件滑動的 至少一對的電刷部、及一端開口且在內部將前述電動機及 前述電刷部收納的外殼、及設在前述旋轉件的旋轉軸、及 201016979 被安裝於該旋轉軸的離心風扇、及將從前述離心風扇被吐 出的風導引至前述外殼內的風路的擴散器、及將前述離心 風扇及前述擴散器覆蓋的方式被安裝於前述外殼且在中央 部設有吸入口的風扇外殼，前述擴散器，是由：設在前述 風扇外殼側的環狀體、及在端部托架側具有複數葉片的擴 散器葉片體、及在配置有前述複數葉片的分隔板的另一方 側具有該分隔板及複數返回葉片的返回導引所構成，在前 述擴散器葉片的後緣側中設有貫通孔，在前述外殼的開口 _ 側中，形成有朝向外周側突出的突出部，在該突出部形成 將風排出的開口部，前述開口部，是在由前述固定件外周 及前述外殼內徑所形成的風路之中前述電刷位置的風路中 不設置開口部。 且，爲了達成上述目的本發明的電動吸塵器，是具備 :將集麈室及電動送風機收納的吸塵器本體、及一端與該 吸塵器本體連接的管、及一端與該管的另一端連接的手操 作部、及一端與該手操作部的另一端連接的延長管、及與 @ 該延長管的另一端連接的吸口體，其特徵爲，前述電動送 風機，是具有：設有旋轉件及固定件的電動機、及與前述 旋轉件滑動的至少一對的電刷部、及一端開口且在內部將 前述電動機及全機電刷部收納的外殼、及設在前述旋轉件 的旋轉軸、及被安裝於該旋轉軸的離心風扇、及將從前述 離心風扇被吐出風導引至前述外殻內的風路的擴散器、及 將前述離心風扇及前述擴散器覆蓋的方式被安裝於前述外 殼且在中央部設有吸入口的風扇外殻，前述擴散器，是由 -8 - 201016979 :設在前述風扇外殻側的環狀體、及在端部托架側具有複 數葉片的擴散器葉片體、及在配置有前述複數葉片的分隔 板的另一方側具有該分隔板及複數返回導引葉片的返回導 引所構成，在前述外殼的開口側中，形成有朝向外周側突 出的突出部，在該突出部形成將風排出的開口部，在從前 述電刷位置的部分的風的流動的前側開始的預定的範圍中 不設置前述開口部。 Ο [發明的效果] 依據本發明，可以效率佳地冷卻電刷，達成電動機的 長壽命化，提高信賴性。 且，依據本發明，可以一邊減少從離心風扇發生的噪 音，一邊提高電動機的壽命及送風機效率。 【實施方式】 Φ 以下參照圖面說明本發明的實施例。 [實施例1] 藉由第1圖及第2圖’說明本發明的一實施例的電動 吸塵器。 第1圖顯示本發明的一實施例的電動吸塵器的外観立 體圖。201是將塵埃在集塵的集塵室及將爲了發生集麈所 需要的吸入氣流用的電動送風機308(第2圖）收納的吸 塵器本體，20 2是一端與吸塵器本體201連接的管’ 203 201016979 是一端與管202的另一端連接的手操作部，204是一端與 手操作部203的另一端連接的延長管，205是與延長管 204的另一端連接的吸口體。206是供進行被設在手操作 部203的電動送風機308的入切用的開關操作部。 在以上的結構中，將手操作部203的開關操作部206 操作的話，被收納於吸塵器本體201的電動送風機308運 轉，使吸入氣流發生。且，從吸口體205吸入麈埃，通過 延長管2 04、手操作部203、管202朝吸塵器本體201的 集塵室集麈。 接著，使用第2圖所示的電動吸塵器中的吸塵器本體 201的縱剖側面圖，說明吸塵器本體201。 吸塵器本體201，是藉由下殻301、上殻3 02及集塵 蓋303構成外圍。在集塵蓋303中形成有吸入口 3 04，在 其內側形成有集塵室306，收容與前述吸入口 304接合的 集塵袋305。在集塵室3 06的後方，形成電動送風機室 3〇7，收納電動送風機308。此電動送風機308的吸氣側 ，是隔著補助過濾器309與集塵室306連通。電動送風機 3〇8的排氣側，是隔著排氣室及排氣過濾器從排氣口 310 朝外部被開放。又，此集塵室3 06是作爲旋風集塵也可以 〇 接著，參照第3圖至第7圖說明電動送風機308。第 3圖是本發明的電動送風機的實施例也就是半縱剖面圖’ 第4圖是顯示將托架4 一部分切除的電動機的平面圖’第 5圖是顯示第3圖的A-A剖面，第6圖是擴散器14的平 201016979 面圖，第7圖是擴散器14、返回導引15等送風機1的靜 止流路部的意示圖。此電動送風機308，是被大致區分爲 送風機1及電動機2。 電動機2，是由：電動機殼、被收納於前述電動機殼 內具有旋轉軸5的馬達轉子6(旋轉件）及捲裝有定子線 圈7的馬達定子8(固定件）所構成，電動機殼是由一端 開口的筒狀的外殼3及被配置於外殻3的開口部側的托架 ❹ 4所構成。朝馬達轉子6的電電力的供給，是藉由電刷部 10及與其接觸的整流子11傳達。 電動機2的馬達定子8是從正面看略八角形狀，4個 長邊8a及4個短邊8b是交互地被配設，4個短邊8b被 固定於外殻3。在馬達定子8的內側中，捲裝有相面對一 對的定子線圈7。由馬達定子8的4個長邊8a的外周及 外殼3的內徑形成4個門狀的流路20a、20b»在無定子 線圈7側的流路20b的下流側配設有電刷部1 〇。電刷部 ® 10是藉由電刷支架l〇a由螺栓被固定在外殻3。在配設有 電刷流路20b的上流側中，托架4是由螺栓被固定，在托 架4中保持軸承9,將旋轉軸5支撐。 送風機1，是包含：離心風扇12、及將該離心風扇 12收納的風扇外殼13、及在擴散器14及該擴散器14的 背面具有返回導引15的靜止流路部。 送風機1，是由：在旋轉軸5的端部具有藉由螺帽16 被固定的複數翼片的離心風扇12、及被配置於離心風扇 12的外周側的具有複數擴散器葉片14a的擴散器14、及 201016979 設在此擴散器葉片14a的上方（風扇外殼13)側的環狀 體17、及設在擴散器14的下方（托架4)側的分隔板18 、及具有形成於藉由此分隔板18的下方（托架4)側的 複數枚的返回導引葉片15a的返回導引15、及將離心風 扇12、擴散器14、返回導引15內包且在中央具有空氣吸 入口 13a且與外殻3連接的風扇外殼13所構成。在風扇 外殼13中，配設有密封構件19，與離心風扇12槪略接 觸，具有防止漏出構造。在本實施例中，由：具有複數擴 _ 散器葉片14a的擴散器14、及分隔板18、及具有複數枚 的返回導引葉片15a的返回導引15，形成固定導引翼片 ，從離心風扇12將被吐出風導引至外殼3內的風路。且 ，依據需要設置環狀體17形成固定導引翼片也可以。 如第6圖所示，擴散器14的擴散器葉片14a的後緣 是形成有三角窗14b (缺口部），其是位於風扇外殼的附 近，從擴散器葉片14a的外周端沿著其擴散器葉片14a的 外周側的面朝內方切入的略三角形狀的凹部的流路。 @ 外殻3的風扇外殼13及嵌合的一端開口緣部是朝向 外周具有彎曲被突出的突出部3a，此突出部3a的外周側 端部是朝向外殻3的開口側曲折被，形成略圓筒形狀的安 裝部3b。風扇外殼13是被壓入嵌合在外殼3的安裝部3b ，被固定於外殼3。 在外殼3的突出部3a中形成不通過電動機2的內部 地將風排出的開口部21。此開口部21’是如第4圖及第 5圖所示朝向旋轉軸5的軸方向開口，並且在電刷部10 -12- 201016979 位置的流路2 0b的上流側的突出部3a上不設置開口部21 由如上述構成的電動送風機3 08將電動機2驅動的話 ，從風扇外殼13的吸入口 13a流入的空氣，是由離心風 扇12被昇壓及增速。從離心風扇12被吐出空氣流，是藉 由在擴散器葉片14a的翼間被減速使運動能量變換成壓力 能量使壓力上昇。從擴散器14被吐出空氣流，是如第6 φ 圖、第7圖的箭頭顯示在三角窗14b略9(Γ轉向。其後， 分流成2個空氣流，其一部分是從外殼3的開口部21被 排出朝外殼3的外部被排氣。且分流的另一方，是進一步 略90°轉向，朝返回導引15流入。通過返回導引15的流 動，是流入外殼3內，將外殼3內的馬達轉子6、定子線 圈7、馬達定子8、電刷部10、整流子11冷卻從外殻3 的排氣口 3c朝外部被排出。 如第4圖、第5圖所示，因爲在電刷部10位置的流 • 路2 0b的上流側的外殻3的突出部3a中未設置開口部21 ，所以從擴散器14流出的空氣流，多流動於具有門狀的 4個流路2 0a、2 0b之中電刷部10在流路20b內。且，在 無電刷部10的流路20a中因爲具有開口部21，朝外殼3 的外部被排氣的風量很多，而很少流動在流路20a中。 電動機2的壽命，是和與整流子11抵接的電刷部1〇 的溫度相關，藉由將電刷部10冷卻，可以將電動機2的 壽命延長。藉由本實施例，因爲可以將電刷部10效率良 好地冷卻，所以可達成電刷部1 0的長壽命化，即電動機 -13- 201016979 2的長壽命化。且，與電刷部1 〇的冷卻關係小的流路20a 中因爲冷卻風量少，所以流路20a內的流速慢，可以減少 損失，提高送風機效率。 即’可以提高電動送風機3 08的效率，達成電動機2 的長壽命化，可以獲得信賴性較高的電動送風機3 08。 因此，藉由在吸塵器本體201搭載此電動送風機308 ，電動吸塵器的信賴性提高，可以提高吸入工作率。 如以上在本實施例中，由電動機2的馬達定子8及外 _ 殼3形成的門狀的4個流路20a、20b之中，在配設有電 刷部10的流路的上流側的外殼3中因爲未形成不通過電 動機將風排出的開口部，所以從擴散器14排出的氣流，[Technical Field] The present invention relates to an electric blower and an electric vacuum cleaner provided therewith. [Prior Art] An electric blower for a conventional vacuum cleaner is an opening of a 0-shell that is open at one end. On the side, a bracket for accommodating the bearing is attached, and a diffuser is disposed between the centrifugal fan and the bracket attached to the rotating shaft that protrudes from the bracket. The fan casing is attached to the bracket by covering the diffuser and the fan. The outer perimeter. A motor stator having a commutator motor fixed to the outer casing and an exhaust port on the side of the outer casing on the opposite fan side. Further, a plurality of openings are provided in the bracket to which the fan casing is mounted, and a part of the airflow from the centrifugal fan is discharged through the opening, and a cut-and-raised portion is formed along the outer surface of the outer casing. Thereby, Φ cools the commutator motor by the air current flowing in the casing and the air current flowing outside (for example, refer to Patent Document 1). Further, in a conventional electric blower, a bracket for accommodating a bearing is attached to an opening side of an outer casing that is open at one end, and a plurality of openings are provided in the bracket, and a total area of the opening is set as a row on the opposite fan side. 70 to 80% of the total area of the air port 'The edge of the outer peripheral side of the opening and the outer peripheral end of the return guide are almost identical. 'The airflow from the centrifugal fan is discharged from both the opening and the exhaust port (for example, patent document) 2 reference). Further, in the conventional electric blower, a bracket for accommodating the bearing is attached to the opening -5 - 201016979 side of the outer casing which is open at one end, and an opening is provided in the bracket so that the airflow discharged from the opening contacts the commutator A brush holder of a motor (for example, refer to Patent Document 3). [Patent Document 1] Japanese Laid-Open Patent Publication No. Hei. No. Hei. No. Hei. No. Hei. No. Hei. No. Hei. Problem to be Solved As in the prior art of the patent document, a part of the airflow discharged from the diffuser can be discharged without passing through the inside of the casing in which the commutator motor is housed, so that the loss can be reduced and the efficiency of the blower can be improved. The airflow that flows in the outer casing in which the commutator motor is housed and flows out from the exhaust port on the counter centrifugal fan side is strong, but the brush that cools the commutator motor, which is particularly high in temperature, is strong, but Brush cooling is not considered in Patent Documents 1 and 2. This is because a plurality of openings are provided in the bracket, so that the amount of air for cooling used inside the motor is lowered, and since the opening is provided in the brush flow path, the cooling of the brush is insufficient, and the life of the motor may be shortened. Further, in the technique of Patent Document 3, the airflow from the opening is brought into contact with the brush holder to indirectly cool the brush, but since the brush holder and the brush have an air layer, the cooling of the brush itself is insufficient. . Further, since the noise generated from the centrifugal fan is directly discharged from the casing to the outside by providing the opening, there is a problem that the noise of the electric blower and the electric vacuum cleaner equipped with the -6-201016979 increases. SUMMARY OF THE INVENTION An object of the present invention is to solve the above problems and to achieve a long life of an electric motor and to improve the efficiency of the blower. Further, an object of the present invention is to improve the life of the motor and the efficiency of the blower while reducing the noise generated from the centrifugal fan. Further, it is an object of the present invention to provide an electric vacuum cleaner which improves the suction operation rate by using the electric blower. (Means for Solving the Problem) In order to achieve the above object, an electric blower according to the present invention includes: a motor provided with a rotating member and a fixing member; and at least a pair of brush portions that slide with the rotating member, and one end opening a casing that houses the electric motor and the brush portion, a rotating shaft that is provided on the rotating member, a centrifugal fan that is attached to the rotating shaft, and a wind that is discharged from the centrifugal fan to the outside a diffuser for the air passage in the casing, and a fan casing that is attached to the casing and has a suction port at a central portion thereof, and is formed on the opening side of the casing. a protruding portion that protrudes toward the outer peripheral side, and the opening portion that forms the air to be discharged in the protruding portion is not provided with the opening portion in the air passage of the brush position in the air passage formed by the outer circumference of the fixing member and the inner diameter of the outer casing . Further, in order to achieve the above object, an electric blower according to the present invention includes: a motor provided with a rotating member and a fixing member; and at least a pair of brush portions that slide with the rotating member, and an open end and the motor and the motor a casing housed in the brush portion, a rotating shaft provided on the rotating member, a centrifugal fan mounted on the rotating shaft in 201016979, and an air passage that guides the air discharged from the centrifugal fan into the casing. a diffuser and a fan casing that is attached to the casing and has a suction port at a central portion thereof, and the diffuser is an annular body provided on the fan casing side, and the diffuser is covered by the centrifugal fan and the diffuser. And a diffuser blade body having a plurality of blades on the end bracket side and a return guide having the partition plate and the plurality of return blades on the other side of the partition plate on which the plurality of blades are disposed, and the diffusion is performed A through hole is formed in the trailing edge side of the blade, and a protrusion protruding toward the outer peripheral side is formed in the opening_side of the outer casing, and the wind is formed at the protruding portion Out of the opening portion, the opening portion, the opening portion is not provided in the location of the brush from the air passage and the outer periphery of the stator housing inner diameter of the air passage is formed. In order to achieve the above object, an electric vacuum cleaner according to the present invention includes a cleaner body that houses a collection chamber and an electric blower, a tube that has one end connected to the cleaner body, and a hand operation unit that has one end connected to the other end of the tube. And an extension pipe having one end connected to the other end of the hand operation portion and a mouthpiece connected to the other end of the extension pipe, wherein the electric blower has a motor provided with a rotating member and a fixing member And a brush portion that is slidable with the rotating member, and a casing that is open at one end and that houses the motor and the electromechanical brush portion inside, and a rotating shaft that is provided on the rotating member and is attached to the rotating shaft a centrifugal fan of the shaft, a diffuser that guides the air blown from the centrifugal fan to the air passage in the outer casing, and a centrifugal fan and the diffuser are attached to the outer casing and are disposed at the center portion. a fan casing having a suction port, the diffuser being -8 - 201016979: an annular body provided on the side of the fan casing, and having a plurality of sides on the side of the end bracket a diffuser blade body of the sheet and a return guide of the partition plate and the plurality of return guide vanes on the other side of the partition plate on which the plurality of vanes are disposed, and the opening side of the outer casing is formed with The protruding portion that protrudes toward the outer peripheral side forms an opening that discharges the wind at the protruding portion, and the opening portion is not provided in a predetermined range from the front side of the flow of the wind at the portion of the brush position. Ο [Effects of the Invention] According to the present invention, it is possible to efficiently cool the brush, thereby achieving a long life of the motor and improving reliability. Further, according to the present invention, it is possible to improve the life of the motor and the efficiency of the blower while reducing the noise generated from the centrifugal fan. [Embodiment] Φ Hereinafter, an embodiment of the present invention will be described with reference to the drawings. [Embodiment 1] An electric vacuum cleaner according to an embodiment of the present invention will be described with reference to Figs. 1 and 2'. Fig. 1 is a perspective view showing the outer casing of an electric vacuum cleaner according to an embodiment of the present invention. Reference numeral 201 denotes a cleaner body that houses dust in a dust collecting chamber and an electric blower 308 (second drawing) for inhaling airflow required for collecting, and a nozzle 203 that is connected to the cleaner body 201 at one end. 201016979 is a hand operating portion that is connected at one end to the other end of the tube 202, 204 is an extension tube that is connected at one end to the other end of the hand operating portion 203, and 205 is a mouthpiece that is connected to the other end of the extension tube 204. Reference numeral 206 denotes a switch operation unit for performing cutting of the electric blower 308 provided in the hand operation unit 203. In the above configuration, when the switch operation unit 206 of the hand operation unit 203 is operated, the electric blower 308 housed in the cleaner body 201 is operated to generate the intake air flow. Further, the sputum is sucked from the mouthpiece 205, and is collected by the extension pipe 404, the hand operating portion 203, and the tube 202 toward the dust collecting chamber of the cleaner body 201. Next, the cleaner body 201 will be described using a longitudinal sectional side view of the cleaner body 201 in the electric vacuum cleaner shown in Fig. 2 . The cleaner body 201 is formed by the lower case 301, the upper case 312, and the dust collecting cover 303. A suction port 309 is formed in the dust collecting cover 303, and a dust collecting chamber 306 is formed inside the dust collecting cover 303, and a dust collecting bag 305 joined to the suction port 304 is housed. An electric blower chamber 3〇7 is formed behind the dust collecting chamber 306, and the electric blower 308 is housed. The intake side of the electric blower 308 is in communication with the dust collecting chamber 306 via the auxiliary filter 309. The exhaust side of the electric blower 3〇8 is opened from the exhaust port 310 to the outside via the exhaust chamber and the exhaust filter. Further, the dust collecting chamber 306 may be used as a cyclone dust collecting device. Next, the electric blower 308 will be described with reference to Figs. 3 to 7 . Fig. 3 is a semi-longitudinal sectional view showing an embodiment of the electric blower of the present invention. Fig. 4 is a plan view showing a motor for cutting a part of the bracket 4. FIG. 5 is a cross-sectional view taken along line AA of Fig. 3, Fig. 6 It is a plan view of the flat 201016979 of the diffuser 14, and Fig. 7 is a view showing the stationary flow path portion of the blower 1 such as the diffuser 14 and the return guide 15. This electric blower 308 is roughly classified into a blower 1 and an electric motor 2. The motor 2 is composed of a motor casing, a motor rotor 6 (rotating member) housed in the motor casing having a rotating shaft 5, and a motor stator 8 (fixing member) wound with a stator coil 7. The motor The case is composed of a cylindrical outer casing 3 that is open at one end and a bracket ❹ 4 that is disposed on the opening side of the outer casing 3. The supply of electric power to the motor rotor 6 is transmitted by the brush unit 10 and the commutator 11 that is in contact therewith. The motor stator 8 of the motor 2 has a substantially octagonal shape as viewed from the front, and four long sides 8a and four short sides 8b are alternately arranged, and four short sides 8b are fixed to the outer casing 3. In the inner side of the motor stator 8, a pair of stator coils 7 facing each other are wound. Four gate-shaped flow paths 20a and 20b are formed by the outer circumferences of the four long sides 8a of the motor stator 8 and the inner diameter of the outer casing 3. The brush portion 1 is disposed on the downstream side of the flow path 20b on the side without the stator coil 7 Hey. The brush portion ® 10 is fixed to the outer casing 3 by bolts by means of a brush holder 10a. In the upstream side where the brush flow path 20b is disposed, the bracket 4 is fixed by a bolt, and the bearing 9 is held in the bracket 4 to support the rotary shaft 5. The blower 1 includes a centrifugal fan 12, a fan casing 13 for accommodating the centrifugal fan 12, and a stationary flow path portion having a return guide 15 on the diffuser 14 and the back surface of the diffuser 14. The blower 1 includes a centrifugal fan 12 having a plurality of fins fixed by a nut 16 at an end portion of the rotating shaft 5, and a diffuser having a plurality of diffuser vanes 14a disposed on an outer peripheral side of the centrifugal fan 12. 14 and 201016979, an annular body 17 provided on the side of the diffuser vane 14a (fan casing 13), and a partition plate 18 provided on the lower side (the bracket 4) side of the diffuser 14, and having a borrowing Thereby, the return guides 15 of the plurality of return guide vanes 15a on the lower side (carrier 4) side of the partition plate 18, and the centrifugal fan 12, the diffuser 14, and the return guide 15 are enclosed and have air in the center. The suction port 13a is constituted by a fan casing 13 connected to the outer casing 3. The fan casing 13 is provided with a sealing member 19 which is slightly in contact with the centrifugal fan 12 and has a leakage preventing structure. In the present embodiment, the diffuser 14 having the plurality of diffuser vanes 14a, the partition plate 18, and the return guide 15 having the plurality of return guide vanes 15a form a fixed guide vane. The air blown from the centrifugal fan 12 is guided to the air passage in the outer casing 3. Further, the annular body 17 may be provided as needed to form a fixed guide vane. As shown in Fig. 6, the trailing edge of the diffuser vane 14a of the diffuser 14 is formed with a triangular window 14b (notch portion) which is located in the vicinity of the fan casing, from the outer peripheral end of the diffuser vane 14a along the diffuser thereof. A flow path of a slightly triangular recessed portion in which the surface on the outer peripheral side of the blade 14a faces inward. The fan case 13 of the outer casing 3 and the fitting one end opening edge portion are projection portions 3a that are curved toward the outer circumference, and the outer circumferential side end portions of the projection portions 3a are bent toward the opening side of the outer casing 3 to form a slight A cylindrical mounting portion 3b. The fan casing 13 is press-fitted into the mounting portion 3b of the casing 3, and is fixed to the casing 3. An opening portion 21 that does not pass through the inside of the motor 2 to discharge the wind is formed in the protruding portion 3a of the outer casing 3. The opening portion 21' is opened in the axial direction toward the rotating shaft 5 as shown in Figs. 4 and 5, and is not on the protruding portion 3a on the upstream side of the flow path 20b at the position of the brush portion 10-12-201016979. When the electric motor 2 is driven by the electric blower 308 configured as described above, the air that has flowed in from the suction port 13a of the fan casing 13 is boosted and increased by the centrifugal fan 12. The air flow is discharged from the centrifugal fan 12 by the deceleration between the wings of the diffuser vane 14a to convert the kinetic energy into pressure energy to increase the pressure. The air flow is discharged from the diffuser 14, as indicated by the arrows of the sixth φ diagram and the seventh diagram, which are shown in the triangular window 14b, which is slightly Γ (turned by the 。 turn. Thereafter, the flow is divided into two air flows, a part of which is from the opening of the outer casing 3 The portion 21 is exhausted toward the outside of the outer casing 3. The other side of the split is further turned slightly by 90° and flows in toward the return guide 15. The flow through the return guide 15 flows into the outer casing 3, and the outer casing 3 is placed. The motor rotor 6, the stator coil 7, the motor stator 8, the brush unit 10, and the commutator 11 are cooled and discharged from the exhaust port 3c of the casing 3 to the outside. As shown in Figs. 4 and 5, The flow of the brush portion 10 is not provided in the protruding portion 3a of the outer casing 3 on the upstream side of the road 20b. Therefore, the air flow from the diffuser 14 flows through the four flow paths having a gate shape. Among the 20a and 20b, the brush portion 10 is in the flow path 20b. Further, since the flow path 20a of the brushless portion 10 has the opening portion 21, the amount of air exhausted toward the outside of the casing 3 is large, and rarely Flows in the flow path 20a. The life of the motor 2 is related to the temperature of the brush portion 1A that abuts the commutator 11, by The brush unit 10 is cooled, and the life of the motor 2 can be extended. According to the present embodiment, since the brush unit 10 can be efficiently cooled, the life of the brush unit 10 can be extended, that is, the motor-13-201016979 In the flow path 20a having a small cooling relationship with the brush portion 1 因为, since the amount of cooling air is small, the flow velocity in the flow path 20a is slow, and the loss can be reduced, and the efficiency of the blower can be improved. In the efficiency of the electric blower 308, the life of the electric motor 2 can be increased, and the electric blower 308 having high reliability can be obtained. Therefore, by mounting the electric blower 308 on the cleaner main body 201, the reliability of the electric vacuum cleaner can be improved, and the electric vacuum cleaner can be improved. In the present embodiment, in the present embodiment, the flow path of the brush portion 10 is disposed among the four gate-shaped flow paths 20a and 20b formed by the motor stator 8 and the outer casing 3 of the motor 2. In the outer casing 3 on the upstream side, since the opening portion through which the wind is not discharged by the motor is not formed, the airflow discharged from the diffuser 14 is
是多流動於門狀的4個流路2 0a、2 0b之中具有電刷部1〇 流路內，很少流動於無電刷部10的流路中。藉此，可以 將電刷部10效率佳地冷卻，可以達成電動機2的長壽命 化，提高信賴性。且，與電刷部1 0的冷卻關係小的流路 中因爲風量少，所以流路內的流速變慢，可以減少損失， G 提高送風機效率。 [實施例2] 接著，使用第8圖說明本發明的他的實施例。第8圖 是第3圖的A-A剖面。與上述實施例相同零件是使用同 一的符號，省略其說明。 在上述實施例中，在外殼3的突出部3a中不通過電 動機2的內部將風排出的開口部21，是在電刷部10位置 -14- 201016979 的流路20b的上流側的突出部3a上未設匱，如第8圖所 示，在電刷部10位置的流路20b的上流側的突出部3a上 ，將電刷部1 0位置的部分的風的流動的前側塞住，從電 刷部1 〇的位置的後側形成開口部2 1。 從擴散器1 4排出的空氣流的流動因爲繞轉，所以即 使將電刷部1 0位置的部分的風的流動的前側塞住，從電 刷部1 〇的位置朝後側配置開口部2 1，也可以維持電刷部 • 10的冷卻效果，可以將與冷卻關係小的流路的冷卻風朝 外殼3外排氣，可以進一步提高送風機效率。因此，可達 成電動送風機3 08的電動機2的長壽命化，效率可以進一 步提尚。 返回導引15是由複數枚的返回導引葉片15a所構成 ，相鄰接的返回導引葉片15a之間形成有風路。流動於此 風路的風，是從外殻5的外周側朝向內周側流動。且，風 雖是朝向4個門狀的流路20a、20b，但是朝向流路20a # 的風的一部分是從形成於朝向流路20a的途中的開口部 21朝外殼3的外部被排出。朝向流路2 0b的風，是其幾 乎是被導引至流路20a、20 b。在本實施例中，形成於相 鄰接的返回導引葉片15a之間的複數風路之中，在朝向將 電刷部10冷卻的流路20b的風路位置的突出部33中，不 形成開口部21。藉由這種構成，提高送風機的效率，且 可以進行電刷的冷卻。 在實施例1及2中，開口部21是橫跨外殻3的周方 向的略1/4以上形成。對於提高外殼3的強度的手段是使 -15- 201016979 用第9圖說明。第9圖是第3圖的A-Λ剖面。與上述實 施例相同零件是使用同一的符號，省略其說明。位於擴散 器14的下方的返回導引葉片i5a因爲是橫跨開口部21的 方式設置，所以開口部21的一部分是藉由返回導引葉片 1 5 a被塞住》 在本實施例中’在返回導引葉片15a的位置的開口部 21的1處設有寬度不與朝向旋轉中心返回導引葉片15a 的寬度同等的開口的部分（補強部22)。在藉由開口部 21的返回導引葉片15a塞住處，因爲設置無開口的部分 步 一 進 度 強 的 3 殻08 外3 強機 加風 以送 可動 ’ 電 匕匕 勺 性高 卻較 冷性 響賴 影信 不得 以獲 所以 ， 可 [實施例3] 接著，使用第10圖說明本發明的他的實施例。第10 圖是本實施例的電動送風機的半縱剖面圖，第11圖是擴 散器14的立體圖（環狀體17無圖示）。與上述實施例相 同零件是使用同一的符號，省略其說明。 擴散器14,是在擴散器葉片14a全部的後緣側設有 貫通孔23。藉由在擴散器葉片14a設置貫通孔23,使： 交界層發達的擴散器葉片14a的凸面側24的領域、及交 界層薄的接近主流流動的擴散器葉片14a的凹面側25的 領域彼此連接。凸面側24的壓力因爲是比凹面側25更高 ，所以從凸面側24朝向凹面側25漏出的流動產生，將凸 面側24的交界層吸出，朝向凹面側25的主流側噴出。其 -16 - 201016979 結果，至其爲止朝凹面側25偏流的主流是成爲流動於流 路中央部分。且，擴散器葉片14a的凸面側24因爲是三 角窗14b較寬的開口，所以從擴散器14排出的流動容易 朝三角窗14b流動而可實現平順地彎曲流動，成爲容易從 外殼3的開口部21被排氣。因此，與在擴散器葉片14a 無貫通孔23者相比，可以改善送風機效率。 且，因爲藉由在外殼3設置開口部21，將從離心風 φ 扇12發生的噪音從風扇外殼13直接朝外部放出，所以電 動送風機3 08和搭載其的電動吸塵器的噪音增大。但是， 因爲藉由設在擴散器葉片14a的貫通孔23，使通過擴散 器葉片14a之間的音波通過貫通孔23就可以由擴散器葉 片14a的兩側干渉使減弱所以電動送風機本身的噪音減少 。因此，即使在外殼3具有開口部21，也可達成噪音減 少，噪音減少及效率改善可以兩立。 因此，藉由搭載此電動送風機3 08，可以達成電動吸 # 塵器的低噪音化。 [產業上的利用可能性] 如以上，本發明的電動送風機及具備其的電動吸塵器 ，是可達成電動送風機的信賴性的提高及效率的提高。因 此，可達成電動吸塵器的信賴性提高及吸入工作率的提高 。且，對於使用電動送風機的家庭用電化機器、產業機器 等的用途也可以廣泛適用。 -17- 201016979 【圖式簡單說明】 [第1圖]本發明的一實施例的電動吸塵器的外觀立體 圖。 [胃2圖]本發明的一實施例的吸塵器本體的縱剖面圖 [第3圖]本發明的一實施例的電動送風機的半縱剖面 圖。Among the four flow paths 20a and 20b that flow in a gate shape, the brush portion 1 is in the flow path, and flows little in the flow path of the brushless portion 10. Thereby, the brush portion 10 can be efficiently cooled, and the life of the motor 2 can be extended to improve the reliability. Further, since the flow rate in the flow path having a small cooling relationship with the brush portion 10 is small, the flow velocity in the flow path is slow, and the loss can be reduced, and the efficiency of the blower is improved. [Embodiment 2] Next, an embodiment of the present invention will be described using Fig. 8. Figure 8 is a cross-sectional view taken along line A-A of Figure 3. The same components as those of the above embodiment are denoted by the same reference numerals, and the description thereof will be omitted. In the above-described embodiment, the opening portion 21 that does not pass through the inside of the motor 2 in the protruding portion 3a of the outer casing 3 is the protruding portion 3a on the upstream side of the flow path 20b at the position of the brush portion 10-14-201016979. In the protruding portion 3a on the upstream side of the flow path 20b at the position of the brush portion 10, the front side of the flow of the wind at the portion of the brush portion 10 is plugged, as shown in Fig. 8 The opening portion 21 is formed on the rear side of the position of the brush portion 1 . Since the flow of the air flow discharged from the diffuser 14 is rotated, even if the front side of the flow of the wind at the portion of the brush portion 10 is blocked, the opening 2 is disposed from the position of the brush portion 1 to the rear side. 1. The cooling effect of the brush unit 10 can be maintained, and the cooling air of the flow path having a small cooling relationship can be exhausted to the outside of the casing 3, and the efficiency of the blower can be further improved. Therefore, the life of the electric motor 2 that can reach the electric blower 308 can be extended, and the efficiency can be further improved. The return guide 15 is composed of a plurality of return guide vanes 15a, and an air path is formed between the adjacent return guide vanes 15a. The wind flowing through the air passage flows from the outer peripheral side of the outer casing 5 toward the inner peripheral side. In addition, the wind is directed toward the four door-shaped flow paths 20a and 20b, but a part of the wind that faces the flow path 20a# is discharged from the opening 21 formed in the middle of the flow path 20a toward the outside of the casing 3. The wind toward the flow path 20b is almost directed to the flow paths 20a, 20b. In the present embodiment, among the plurality of air passages formed between the adjacent return guide vanes 15a, the projections 33 toward the air passage position of the flow passage 20b that cools the brush portion 10 are not formed. Opening portion 21. With this configuration, the efficiency of the blower is improved, and the brush can be cooled. In the first and second embodiments, the opening portion 21 is formed to be slightly 1/4 or more across the circumferential direction of the outer casing 3. The means for increasing the strength of the outer casing 3 is to make -15-201016979 illustrated in Fig. 9. Figure 9 is a cross-sectional view of the A-Λ of Figure 3. The same components as those in the above embodiment are denoted by the same reference numerals, and their description will be omitted. Since the return guide vane i5a located below the diffuser 14 is disposed across the opening portion 21, a part of the opening portion 21 is plugged by the return guide vane 15a" in the present embodiment One portion of the opening portion 21 that returns to the position of the guide vane 15a is provided with a portion (the reinforcing portion 22) whose width is not equal to the opening that is equal to the width of the rotation center return guide vane 15a. The plug guide 15a is closed by the returning portion 21 of the opening portion 21, because the portion where the opening is not provided is stepped by a strong 3-shell 08, and the 3 strong machine is added to the air to send a movable 'electrical spoon, but the cold is louder. The image may not be obtained, but [Embodiment 3] Next, the embodiment of the present invention will be described using FIG. Fig. 10 is a half longitudinal sectional view of the electric blower of the embodiment, and Fig. 11 is a perspective view of the diffuser 14 (the annular body 17 is not shown). The same components as those in the above embodiment are denoted by the same reference numerals, and the description thereof will be omitted. The diffuser 14 is provided with a through hole 23 on the trailing edge side of all of the diffuser vanes 14a. By providing the through hole 23 in the diffuser vane 14a, the field of the convex side 24 of the diffuser vane 14a in which the boundary layer is developed and the area of the concave side 25 of the diffuser vane 14a which is close to the main flow of the boundary layer are connected to each other. . Since the pressure on the convex side 24 is higher than the concave side 25, the flow leaking from the convex side 24 toward the concave side 25 occurs, and the boundary layer of the convex side 24 is sucked out, and is discharged toward the main flow side of the concave side 25. As a result of the -16 - 201016979, the main flow of the bias current toward the concave side 25 is to flow in the central portion of the flow path. Further, since the convex side 24 of the diffuser vane 14a is a wide opening of the triangular window 14b, the flow discharged from the diffuser 14 easily flows toward the triangular window 14b, and smooth flow can be smoothly performed, making it easy to open from the opening of the outer casing 3. 21 was exhausted. Therefore, the blower efficiency can be improved as compared with the case where the diffuser vane 14a has no through hole 23. Further, since the opening portion 21 is provided in the outer casing 3, the noise generated from the centrifugal wind φ fan 12 is directly emitted from the fan casing 13 to the outside, so that the noise of the electric blower 308 and the electric vacuum cleaner on which it is mounted increases. However, since the sound waves passing through the diffuser vanes 14a pass through the through holes 23 by the through holes 23 provided in the diffuser vanes 14a, the noise of the electric blower itself can be reduced by being dried by both sides of the diffuser vanes 14a. . Therefore, even if the outer casing 3 has the opening portion 21, noise reduction can be achieved, and noise reduction and efficiency improvement can be achieved. Therefore, by mounting the electric blower 308, the noise of the electric vacuum cleaner can be reduced. [Industrial Applicability] As described above, the electric blower of the present invention and the electric vacuum cleaner including the same can achieve improved reliability and efficiency of the electric blower. Therefore, the reliability of the vacuum cleaner and the improvement of the suction operation rate can be achieved. Further, it can be widely applied to applications such as household electric equipment and industrial equipment using an electric blower. -17- 201016979 [Brief Description of the Drawings] [Fig. 1] An external perspective view of an electric vacuum cleaner according to an embodiment of the present invention. [Stomach 2] A longitudinal sectional view of a vacuum cleaner body according to an embodiment of the present invention [Fig. 3] is a half longitudinal sectional view of an electric blower according to an embodiment of the present invention.
[第4圖]第3圖的托架的一部分切除的電動機的平面 圖。 [第5圖]第3圖的A-A剖面。 [第6圖]擴散器的平面圖。 [第7圖]送風機的靜止流路部的意示圖。 [第8圖]本發明的一實施例的電動送風機的電動機的 平面圖。[Fig. 4] A plan view of a motor in which a part of the bracket of Fig. 3 is cut. [Fig. 5] A-A section of Fig. 3. [Fig. 6] A plan view of the diffuser. [Fig. 7] A view showing the stationary flow path portion of the blower. Fig. 8 is a plan view showing an electric motor of an electric blower according to an embodiment of the present invention.
[第9圖]本發明的一實施例的電動送風機的電動機的 平面圖。 [第10圖]本發明的一實施例的電動送風機的半縱剖 面圖。 [第11圖]擴散器的立體圖。 【主要元件符號說明】 1 :送風機 2 :電動機 3 :外殻 -18- 201016979 3 a :突出部 3b :安裝部 3 c :排氣口 4 :托架 5 :旋轉軸 6 :馬達轉子 7 :定子線圈 ❿ 8 :馬達定子 8a:馬達定子外周的長邊 8b:馬達定子外周的短邊 9 :軸承 1 〇 :電刷部 1 0 a :電刷支架 1 1 :整流子 1 2 :離心風扇 # 13 :風扇外殻 13a、3 04 :吸入口 14 :擴散器 14a :擴散器葉片 15 :返回導引 15a :返回導引葉片 16 :螺帽 17 :環狀體 18 :分隔板 -19 201016979 1 9 :密封構件 20a、20b :流路 2 1 :開口部 22 :補強部 23 :貫通孔 201 :吸塵器本體 202 ：管 2 0 3 :手操作部 204 :延長管 205 :吸口體 206 :開關操作部 301 :下殼 302 :上殼 3 03 :集塵蓋 3 05 :集塵袋 3 06 :集塵室 3 07 :電動送風機室 3 08 :電動送風機 3 09 :補助過濾器 3 1 0 :排氣口 -20-[Fig. 9] Fig. 9 is a plan view showing an electric motor of an electric blower according to an embodiment of the present invention. Fig. 10 is a half longitudinal sectional view showing an electric blower according to an embodiment of the present invention. [Fig. 11] A perspective view of the diffuser. [Main component symbol description] 1 : blower 2 : motor 3 : outer casing -18- 201016979 3 a : protruding portion 3b : mounting portion 3 c : exhaust port 4 : bracket 5 : rotating shaft 6 : motor rotor 7 : stator Coil ❿ 8 : Motor stator 8a: Long side 8b of the outer circumference of the motor stator: Short side 9 of the outer circumference of the motor stator: Bearing 1 〇: Brush portion 1 0 a : Brush holder 1 1 : Commutator 1 2 : Centrifugal fan # 13 : Fan casing 13a, 3 04 : Suction port 14 : Diffuser 14a : Diffuser blade 15 : Return guide 15a : Return guide vane 16 : Nut 17 : Annular body 18 : Separator plate 19 201016979 1 9 : Sealing members 20 a and 20 b : Flow path 2 1 : Opening portion 22 : Reinforcing portion 23 : Through hole 201 : Vacuum cleaner body 202 : Tube 2 0 3 : Hand operation portion 204 : Extension tube 205 : Suction body 206 : Switch operation portion 301 : Lower case 302 : Upper case 3 03 : Dust cover 3 05 : Dust bag 3 06 : Dust chamber 3 07 : Electric blower room 3 08 : Electric blower 3 09 : Supplement filter 3 1 0 : Exhaust port - 20-