經濟部智慧財產局員工消費合作社印製 588496 A7 B7 五、發明説明（1 ) 【發明所屬之技術領域】 本發明係關於軸流風扇，特別係關於在由於電動機的 動作所產生的振動之中，爲了抑制電磁音的頻帶（frequency band)的振動，在構裝狀態下，傳播至外部裝置的軸流風扇 的改進。 【先前技術】 【專利文獻1】 曰本特開2〇0 1 — 1 7 8 0 9 8號公報 【專利文獻2】 曰本特開平11一89168號公報 【專利文獻3】 曰本特開平7-213005號公報 家電製品和各種〇A機器等之中，大多使用冷卻用軸 流風扇。此種製品，爲了防止溫度上升和降低製品成本 *等’被要求軸流風扇的大風量化。軸流風扇，隨著風量的 增加’電動機的輸出變大，由於電磁激振力（exciting force) 所造成的噪音，有變大的傾向。另一方面，由於追求舒適 的環境’降低噪音的要求也日益增加，對應此要求的技術 也正在開發中。 作爲組裝有軸流風扇的外部裝置的噪音降低技術，例 如有以下的技術。 在曰本特開2 0 0 1 — 1 7 8 0 9 8號公報（專利文 獻1 )中所記載的發明，係將黏彈性材料夾在2枚鋼板之 本紙張尺度適用中國國家標準（CNS ) A4規格（210X 297公釐） ϋ^ι« ^ϋ·.— βιΒΒΒΙΙ tamamMe mi (請先閱讀背面之注意事項再填寫本頁) --訂-----^線 588496 經濟部智慧財產局員工消費合作社印製 A7 ___B7.五、發明説明（2 ) 間的夾心層構造的制振板，構成送風機的馬達安裝板，減 衰由於齒槽效應轉矩所產生的振動，來降低噪音。 在曰本特開平1 1 一 8 9 1 6 8號公報（專利文獻 2 )中所記載的發明，係針對將保持軸流風扇馬達的軸承 的部分，利用輪幅與外側的機殼結合的殻體構造，藉由使 輪幅中的一根與用來拉出連接用端子的導線銷一體地形 成，使風量的損失最小化，來謀求低噪音化。 在曰本特開平7 - 2 1 3 0 0 5號公報（專利文獻 3 )中所記載的發明，係將軸流風扇馬達的防振構件插入 減輕（lightening)部，作成防止將振動傳達至使用螺絲等的 固定工具來安裝的裝置之形態的構造。 【發明內容】 (發明所欲解決之課題） 但是’在日本特開2001 - 178098號公報 (專利文獻1 )中所記載的發明，對於風扇馬達的安裝， 若沒有使用安裝板，則無法應用。 又’在日本特開平1 1 一 8 9 1 6 8號公報（專利文 .獻2 )中所記載的發明，對於噪音的控制成分也就是氣動 力音雖然有效，但是對於電磁音的效果少。 又，在日本特開平7 — 2 1 3 0 0 5號公報（專利文 獻3 )中所記載的發明，對於將軸流風扇馬達安裝在各種 裝置中的手段，若沒有使用螺絲等的固定工具，則無法應 用。 本紙張尺度適用中國國家標準（CNS ) A4規格（210X 297公釐） 〇 (請先閱讀背面之注意事項再填寫本頁) 裝- 訂 線 588496 Α7 Β7 五、發明説明（3) 本發明的目的在於提供一種軸流風扇，即使以嵌λ的 方式將軸流風扇安裝在各種外部裝置中的情況，對於因爲 電動機所產生的電磁激振力所導致的軸流風扇的振動，傳 播至外部裝置，而使該外部裝置振動所產生的放射音（電 磁音），能夠加以減少。 (解決課題所用的手段） 本發明的軸流風扇，係針對具備：細腰管、葉片、驅 動此葉片的電動機、及將已安裝此電動機的電動機保持部 保持在前述細腰管上的連結部之形態的軸流風扇，其特徵 爲· 前述連結部，具備：從前述細腰管的風洞部的端面， 一體地往軸方向伸張的安裝部；及自此安裝部一體地橫斷 通風路地伸張，由以收容電動機通電構件之形態連結至前 述電動機保持部的腳、和與前述電動機保持部連結的連結 腳，所組成的腳部； 前述安裝部的剖面積，比前述連結腳的剖面積大，且 從軸方向來看的安裝部之圓周方向的寬度，比前述腳部中 的至少前述連結腳的寬度大。 而且，前述安裝部的剖面積爲前述連結腳的剖面積的 3 · 5倍以上。 又，前述連結腳，連通安裝部的外周側端部的剖面 積，構成比連通電動機保持部之內周側端部的剖面積大； 而安裝部的剖面積，則爲該平均剖面積的3 · 5倍以上。 本紙張尺度適用中國國家標準（CNS ) Α4規格（210Χ 297公釐） (請先閲讀背面之注意事項再填寫本頁) .裝· 訂 經濟部智慧財產局員工消资合作社印製 588496 經濟部智慧財產局員工消費合作社印製 A7 B7 五、發明説明（4 ) 又，前述連結腳，其連通安裝部的外周側端部’相對 於連通電動機保持部的內周側端部’構成軸方向厚度增 加。 又，連通前述連結腳之安裝部的往軸方向來看的圓周 方向的寬度，爲該連結腳的寬度的2倍以上。 又，連通前述連結腳之安裝部的往軸方向來看的圓周 方向的寬度，構成使連通連結腳的前端部小，而使連通風 洞部的端面的根部大，而其平均尺寸爲該連結腳的寬度的 2倍以上。 又，前述連結腳的剖面，沿著根據葉片的形狀之送風 方向，形成具有長軸的橢圓狀。 又，前述連結腳的剖面，沿著根據葉片的形狀之送風 方向，形成具有長軸的菱形狀。 又，本發明的軸流風扇，係針對具備：細腰管、葉 片、驅動此葉片的電動機、及將已安裝此電動機的電動機 保持部保持在前述細腰管上的連結部之形態的軸流風扇， 其特徵爲： 前述連結部，具備：從前述細腰管的風洞部的端面， 一體地往軸方向伸張的安裝部；及自此安裝部一體地橫斷 通風路地伸張，由以收容電動機通電構件之形態連結至前 述電動機保持部的腳、和與前述電動機保持部連結的連結 腳，所組成的腳部； 前述安裝部的剛性，比連結腳的剛性大；且藉由改變 該連結腳和安裝部的材質或補強構件，來設定連結腳和安 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 線 588496 A7 ___—_B7__ 五、發明説明（5 ) 裝部的剛性比，使得根據前述連結腳和安裝部的剛性比、 電動機的質量、及安裝部的剛性所決定出來的角頻率的 ，2倍的値，能夠比根據細腰管全體的1次變形固有角頻 率和存在於前述細腰管之固有角頻率附近的電動機旋轉數 所決定的電磁力的激振角頻率的値小。 【實施方式】 (本發明之實施形態） . 以下，參照圖面來說明本發明的實施形態。 第1圖係表示構成本發明的軸流風扇的一實施形態； 表示軸流風扇1 0 0、細腰管（Venturi) 1、電動機保持部 7、及構成連結部9的安裝部9 1和連結腳9 2的構成； (a )爲軸流風扇的前視圖、（b )爲將安裝部9 1 和連結腳9 2的連結部分B擴大表示的前視圖、（c )爲 將安裝部9 1和連結腳9 2的連結部分B擴大表示的側面 圖。第2圖中，（a)爲連結腳92的C — C剖面圖、 (b)爲安裝部9 1的D — D剖面圖。又，第3圖係第1 圖所示的軸流風扇1 0 0的縱剖面圖。 * 在第1圖〜第3圖中，軸流風扇1 〇 〇，係藉由從細 腰管1 一體地伸張的連結部9，來支撐電動機保持部7的 構造。連結部9 ，具備：從細腰管1的風洞部1 a的端 面，一體地往軸方向伸張的安裝部9 1 ;及自此安裝部 9 1 一體地橫斷通風路地伸張，而連結至電動機保持部7 的複數個連結腳9 2。連結腳的其中一假，倂設收容電動 本紙張尺度適用中國國家標準（CNS ) A4規格（210X 297公釐） ~ (請先閱讀背面之注意事項再填寫本頁) -裝·Printed by the Consumer Cooperative of the Intellectual Property Bureau of the Ministry of Economic Affairs 588496 A7 B7 V. Description of the invention (1) [Technical field to which the invention belongs] The present invention relates to an axial flow fan, and particularly to vibration caused by the action of an electric motor. In order to suppress the vibration of the frequency band of electromagnetic sound, the axial flow fan which is propagated to the external device in the structured state is improved. [Prior Art] [Patent Document 1] Japanese Patent Publication No. 2000 1-1 7 8 0 9 8 [Patent Literature 2] Japanese Patent Publication No. 11-89168 [Patent Literature 3] Japanese Patent Publication No. 7 -213005 Axial-flow fans for cooling are mostly used in home appliances and various OA devices. This type of product is required to quantify the high wind of an axial flow fan in order to prevent temperature rise and reduce product cost. As the axial flow fan increases, the output of the motor becomes larger, and the noise caused by the electromagnetic exciting force tends to become larger. On the other hand, there is an increasing demand for noise reduction in pursuit of a comfortable environment, and technology to meet this demand is also being developed. Examples of noise reduction techniques for external devices incorporating an axial fan include the following techniques. The invention described in Japanese Patent Application Laid-Open No. 2000-1 1 7 8 0 98 (Patent Document 1) is a paper standard in which a viscoelastic material is sandwiched between two steel plates, and the Chinese National Standard (CNS) is applied. A4 specifications (210X 297 mm) ϋ ^ ι «^ ϋ ·. — ΒιΒΒΒΙΙ tamamMe mi (Please read the precautions on the back before filling out this page) --Order ----- ^ line 588496 Staff of Intellectual Property Bureau, Ministry of Economic Affairs Printed by the Consumer Cooperative A7 ___B7. V. Description of the invention (2) A vibration damping plate with a sandwich structure, which constitutes the motor mounting plate of the blower, attenuates vibration due to cogging torque to reduce noise. The invention described in Japanese Patent Application Laid-Open No. 1 1 8 9 1 6 (Patent Document 2) relates to a case where an axial flow fan motor bearing is held, and a spoke is combined with an outer casing by a spoke. The body structure is formed integrally with one of the spokes and a wire pin for pulling out the connection terminal, thereby minimizing a loss of air volume and reducing noise. The invention described in Japanese Patent Application Laid-Open No. 7-2 1 3 0 0 5 (Patent Document 3) is an anti-vibration member of an axial flow fan motor inserted into a lightening portion to prevent transmission of vibration to use The structure of the form of the device to be fixed by a fixing tool such as a screw. SUMMARY OF THE INVENTION (Problems to be Solved by the Invention) However, the invention described in JP-A-2001-178098 (Patent Document 1) cannot be applied to a fan motor without using a mounting plate. In addition, the invention described in Japanese Patent Application Laid-Open No. 1 1 8 9 168 (Patent Document. Contribution 2), although effective in controlling noise, that is, pneumatic force sound, has little effect on electromagnetic sound. In addition, in the invention described in Japanese Patent Application Laid-Open No. 7-2 1350 (Patent Document 3), if a means for mounting an axial fan motor in various devices is used without a fixing tool such as a screw, It cannot be applied. This paper size applies Chinese National Standard (CNS) A4 specification (210X 297 mm) 〇 (Please read the precautions on the back before filling this page) Binding-Thread 588496 Α7 Β7 V. Description of the invention (3) Purpose of the invention The purpose is to provide an axial flow fan. Even if the axial flow fan is installed in various external devices in a λ-embedded manner, the vibration of the axial flow fan caused by the electromagnetic excitation force generated by the motor is transmitted to the external device. The radiation sound (electromagnetic sound) generated by the vibration of the external device can be reduced. (Means for Solving the Problems) The axial flow fan of the present invention is directed to a thin waist tube, a blade, a motor driving the blade, and a connection portion that holds the motor holding portion on which the motor is mounted on the thin waist tube. The axial flow fan of this form is characterized in that the connecting portion includes a mounting portion integrally extending in the axial direction from an end surface of the wind tunnel portion of the narrow waisted tube, and the mounting portion is integrally extended across the ventilation path from this side. A leg portion composed of a leg connected to the motor holding portion in a form of accommodating a motor current-carrying member and a connecting leg connected to the motor holding portion; a cross-sectional area of the mounting portion is larger than a cross-sectional area of the connecting leg. And the width in the circumferential direction of the mounting portion viewed from the axial direction is larger than the width of at least the connecting leg in the leg portion. In addition, the cross-sectional area of the mounting portion is 3 · 5 times or more the cross-sectional area of the connecting leg. The cross-sectional area of the connecting leg at the outer peripheral side end portion of the communication mounting portion is larger than the cross-sectional area of the inner peripheral side end portion of the communication motor holding portion. The cross-sectional area of the mounting portion is 3 times the average cross-sectional area. · 5 times or more. This paper size applies the Chinese National Standard (CNS) A4 specification (210 × 297 mm) (Please read the precautions on the back before filling out this page). Binding and ordering Printed by the Intellectual Property Cooperative of the Ministry of Economic Affairs, the Ministry of Economic Affairs, and printed by 588496 Printed by the Consumer Bureau of the Property Bureau A7 B7 V. Description of the invention (4) In addition, the connecting leg, the outer peripheral side end portion of the communication mounting portion 'is thicker in the axial direction relative to the inner peripheral side end portion of the communication motor holding portion. . In addition, the width in the circumferential direction when viewed from the axial direction of the mounting portion that communicates with the connection leg is twice or more the width of the connection leg. Further, the circumferential width of the mounting portion connecting the connecting feet as viewed in the axial direction is such that the front end portion of the connecting connecting foot is small and the root of the end surface of the connecting wind tunnel portion is large, and the average size is the connecting foot. More than twice the width. The cross-section of the connecting leg is formed in an elliptical shape having a long axis along the air blowing direction according to the shape of the blade. The cross-section of the connecting leg is formed in a rhombus shape having a long axis along the air blowing direction according to the shape of the blade. The axial flow fan of the present invention is directed to an axial flow in the form of a thin waist tube, a blade, a motor that drives the blade, and a connection portion that holds the motor holding portion to which the motor is mounted on the thin waist tube. The fan is characterized in that: the connecting portion includes a mounting portion integrally extending from the end face of the wind tunnel portion of the narrow-waisted tube in the axial direction; and the mounting portion is integrally extended across the ventilation path to accommodate the motor The form of the current-carrying member is connected to the leg of the motor holding portion and the leg formed by the connecting leg connected to the motor holding portion; the rigidity of the mounting portion is greater than the rigidity of the connecting leg; and by changing the connecting leg And the material or reinforcement of the mounting part to set the connecting feet and the size of the paper. Applicable to China National Standard (CNS) A4 (210X297 mm) " ~-(Please read the precautions on the back before filling this page)- Binding and binding line 588496 A7 ___—_ B7__ 5. Description of the invention (5) The rigidity ratio of the mounting portion is such that according to the rigidity ratio of the connecting leg and the mounting portion, the mass of the motor And the angular frequency determined by the rigidity of the mounting portion, which is twice as high as the rotation frequency of the electric motor existing near the natural angular frequency of the narrow waist tube based on the natural angular frequency of the primary deformation of the entire narrow waist tube. The magnitude of the excited angular frequency of the determined electromagnetic force is small. [Embodiment] (Embodiment of the present invention) Hereinafter, an embodiment of the present invention will be described with reference to the drawings. FIG. 1 shows an embodiment of an axial flow fan constituting the present invention; FIG. 1 shows an axial flow fan 100, a narrow waist tube (Venturi) 1, a motor holding portion 7, and a mounting portion 91 and a connection constituting the connection portion 9. (A) is a front view of the axial fan, (b) is a front view showing the connecting portion B of the mounting portion 9 1 and the connecting portion B 2 enlarged, and (c) is the mounting portion 9 1 An enlarged side view of the connection portion B with the connection leg 92. In FIG. 2, (a) is a C-C sectional view of the connecting leg 92, and (b) is a D-D sectional view of the mounting portion 91. Fig. 3 is a longitudinal sectional view of the axial fan 100 shown in Fig. 1. * In Figs. 1 to 3, the axial fan 100 has a structure in which the motor holding portion 7 is supported by a connecting portion 9 integrally extended from the thin waist tube 1. The connecting portion 9 includes a mounting portion 9 1 that integrally extends in the axial direction from the end face of the wind tunnel portion 1 a of the narrow waist tube 1, and the mounting portion 9 1 integrally extends across the ventilation path and is connected to the motor. The plurality of connecting feet 9 2 of the holding portion 7. One of the connecting feet is set to accommodate electric motors. The paper size applies the Chinese National Standard (CNS) A4 specification (210X 297 mm) ~ (Please read the precautions on the back before filling this page)
*tT 經濟部智慧財產局員工消费合作社印紫 588496 A7 B7 五、發明説明（6) 機通電構件1 2之形態的腳，而成爲通電構件收容連結腳 9 3° 電動機保持部7，具備形成軸承箱的輪轂6 ;其內周 面嵌著2個軸承5，而電動機的定子4和構成此電動機的 控制電路的印刷電路基板2 ，則被固定在其外周面。而 且’以永久磁鐵1 1爲主體構件的轉子3，與葉片1 〇成 爲一體，且藉由隔著小空隙，旋轉自如地面對面地被保持 在前述軸承5中的軸8，而被支持在此定子4的外周面。 亦即’轉子3、定子4、軸承5及輪轂6，構成電動機。 將此軸流風扇1 0 0安裝在外部裝置中的情況之噪音 傳播路徑，如以下所示。 首先，加振源爲電動機的電磁激振力。此激振力，直 接地施加在定子4和轉子3上。從定子4來的振動，經由 輪轂6、電動機保持部7、連結部9，被傳達至細腰管 1。從轉子3來的振動，經由軸承5、輪轂6、電動機保 持部7、連結部9，被傳達至細腰管1。從細腰管1往外 部裝置的振動傳達，則係經由軸流風扇1 〇 〇的安裝手段 來進行。 當軸流風扇1 0 0的激振力，爲電動機的齒槽效應轉 矩（cogging torque)的情況；此齒槽效應轉矩爲作用在轉子 3和定子4的圓周方向的力。由於此激振力，在軸流風扇 1 0 0單體處，容易發生振動·噪音者，係定子4和電動 機保持部7往旋轉軸圓周方向扭曲，該振動經由連結部 9，被傳達至細腰管1 ，而該細腰管1發生彎曲振動的固 本紙張尺度適用中國國家標準（CNS ) Α4規格（210Χ297公釐） I: ί I - - - I - I — 1 I ί I I (請先閱讀背面之注意事項再填寫本頁)* tT Intellectual Property Bureau Employees ’Cooperative Cooperative, Zizi 588496 A7 B7 of the Ministry of Economic Affairs. 5. Description of the Invention (6) The foot of the form of the machine current-carrying member 12 becomes the connection member 9 3 ° of the current-carrying member. The motor holding part 7 is provided with a bearing. The hub 6 of the box; two bearings 5 are embedded on the inner peripheral surface, and the stator 4 of the motor and the printed circuit board 2 constituting the control circuit of the motor are fixed on the outer peripheral surface. In addition, the rotor 3, which has the permanent magnet 11 as a main component, is integrated with the blade 10, and is supported by a shaft 8 held in the aforementioned bearing 5 in a freely rotating manner across the ground through a small gap. The outer peripheral surface of the stator 4. That is, the 'rotor 3, the stator 4, the bearing 5, and the hub 6 constitute a motor. The noise propagation path when this axial flow fan 100 is installed in an external device is shown below. First, the source of vibration is the electromagnetic excitation force of the motor. This exciting force is directly applied to the stator 4 and the rotor 3. The vibration from the stator 4 is transmitted to the thin waist tube 1 via the hub 6, the motor holding portion 7, and the connecting portion 9. The vibration from the rotor 3 is transmitted to the slim waist tube 1 via the bearing 5, the hub 6, the motor holding portion 7, and the connecting portion 9. Vibration transmission from the narrow waist tube 1 to the external device is performed through the installation method of the axial fan 100. When the excitation force of the axial flow fan 100 is the cogging torque of the motor; this cogging torque is the force acting on the rotor 3 and the stator 4 in the circumferential direction. Due to this exciting force, those who are prone to vibration and noise at the axial fan 100 unit, the stator 4 and the motor holding portion 7 are twisted in the circumferential direction of the rotating shaft, and this vibration is transmitted to the finer through the connecting portion 9 Waist tube 1, and the solid paper size of the thin waist tube 1 which is subject to bending vibration is applicable to the Chinese National Standard (CNS) Α4 specification (210 × 297 mm) I: ί I---I-I — 1 I ί II (please first (Read the notes on the back and fill out this page)
、1T 經濟部智慧財產局8工消費合作社印製 -10- 588496 A7 B7 五、發明説明（7) 有模式。第4圖係以誇張方式描述此固有模式的彎曲振動 狀態的圖。 振動模式雖然存在多數，當軸流風扇1 0 0安裝在外 部裝置中的方法爲嵌入的情況，振動放射音特別成爲問題 者，係電磁激振力和如第4圖所示的固有模式成爲共振狀 態的情況。 對於軸流風扇1 0 0，直接施加電磁激振力者，爲定 子4和轉子3。而且，此軸流風扇1 0 0的振動，係經由 細腰管1 ，傳播至外部裝置。因此，即使由於電磁激振 力，定子4、輪轂6、電動機保持部7的振動被激發，只 要做成該振動難以經由連結部9而傳達至細腰管1的構 造，便.能夠減少電磁音的放出。 因此，在此實施形態中，藉由使連結部9中的安裝部 9 1和連結腳9 2的形狀和剛性予以適當化，來減少從保 持電動機的電動機保持部7，經由連結部9，傳播至細腰 管1的振動，且減少從軸流風扇1 0 0傳達至外部裝置的 振動，結果便可以減少電磁音。 將冷藏庫當作是外部裝置，以將軸流風扇1 〇 〇安裝 在該冷藏庫中的情況爲例，說明連結部9的適當化例子和 效果。 第5圖係安裝有軸流風扇的冷藏庫2 0 0的縱剖側視 圖；軸流風扇1 0 0，係在樹脂製的細腰管1的外周，纒 繞有緩衝材的狀態下，被設置在冷藏庫2 0 0的庫內規定 位置。 本紙張尺度適用中國國家標準（CNS ) A4規格（210X 297公釐） II—. I I 1--- - I - - I I ! (請先閲讀背面之注意事項再填寫本頁) 訂 經濟部智慧財產局員工消費合作社印製 -11 - 588496 Α7 Β7 五、發明説明（8) 當作是冷藏庫2 0 〇的庫內風扇來使用的軸流風扇 1 0 0，當打開門或抽屜時，雖然有停止的情況和沒有停 止的情況，此處考慮沒有停止的情況。 此種冷藏庫2 0 〇，一旦打開門或抽屜，則可以聽到 軸流風扇1 0 0的風切音和電磁音。對於風切音，一旦聽 感佳的3 Ο OHz〜1 〇 〇 OHz頻帶成分的電磁音變 大，則將會聽到刺耳的聲音。 第6圖係連結部9之中，例如將連結至第2圖所示的 連結腳9 2的安裝部9 1的剖面積A 1，作成爲連結腳 9 2的剖面積A的2 . 3倍的情況之附近音場的噪音頻 譜。此頻譜中，引人注目的頻譜，爲1 / 3倍頻帶的 4 0 0 Η z的頻帶；此爲相當於電磁音的頻譜，且爲刺耳 的聲音。 又’第6圖也一倂表示將連結腳9 2的剖面積Α作成 與上述相同的面積，而變更安裝部9 1的剖面積A 1 ，成 爲連結腳9 2的剖面積A的3 · 5倍、4 · 2倍的情況的 噪音頻譜。藉由變更安裝部9 1的剖面積A 1 ，雖然總體 地（0 · A ·)幾乎沒有改變，但是可以降低刺耳的 4 0 OHz頻帶的頻譜大約5 dB左右。 4 0 0 Η z頻帶的頻譜，爲電磁音的頻譜；對於此頻 譜的軸流風扇1 0 0的固有模式，如第4圖所示。觀察第 4圖的固有模式，細腰管1的外周中央部1 Μ的位移大。 第7圖係表示在電動機保持部7和細腰管1的外周中 央部1 Μ之間的振動傳達率。 本紙張尺度適用中國國家標準（CNS ) Α4規格（210X 297公釐〉 ----I--I 批衣__ (請先閲讀背面之注意事項再填寫本頁) ，1Τ 線 經濟部智慧財產局8工消費合作社印製 -12- 588496 A7 B7 五、發明説明（9) 若根據第7圖，4 Ο Ο Η z附近的振動傳達率，當將 安裝部9 1的剖面積A 1作成爲連結腳9 2的剖面積Α的 2 _ 3倍的情況，最大値爲8 · 5 ;相對於此，將安裝部 9 1的剖面積a 1作成爲連結腳9 2的剖面積A的3 . 5 倍的情況，則大約爲3 · 2 ;而將安裝部9 1的剖面積 A 1作成爲連結腳9 2的剖面積A的4 · 2倍的情況，則 成爲1·0以下。這結果正是表示藉由安裝部91的剖面 積A 1的適當化，減少4 Ο Ο Η z頻帶的振動傳達率，所 以利用將安裝部9 1的剖面積A 1作成爲連結腳9 2的剖 面積A的3 _ 5倍以上，則實用的效果高。 因此，此實施形態，只要是刺耳電磁音的發生原因之 4 Ο 〇 Η z頻帶的振動，難以從電動機保持部7傳播至細 腰管1的構造，則前述連結腳9 2 ，如第8圖·（ a )所 示，可以爲全體大致相同的剖面積；也可以如（b )所 示，連通安裝部9 1的外周側端部的剖面積，形成比連通 電動機保持部7之內周側端部的剖面積大，而將其平均値 當作是剖面積A。同樣的，在安裝部9 1中，由軸方向來 看的圓周方向的寬度，如第8圖（c )所示，也可以形成 使連通連結腳9 2的前端部小，而使連通風洞部的端面的 根部大，而將其平均値當作是剖面積A 1。 上述連結腳9 2，作爲使與安裝部9 1連通的外周側 端部的剖面積，比與電動機保持部7連通的內周側端部的 剖面積大的構造，理想爲不使圓周方向的寬度尺寸t 3增 大，而往排氣側方向增加軸方向的寬度尺寸t 4。 本紙張尺度適用中國國家標準（CNS ) A4規格（210X297公釐） n n H —ϋ ί U ί n m I (請先閱讀背面之注意事項再填寫本頁) 訂 線 經濟部智慧財產局員工消費合作社印製 -13- 588496 A7 ;___ B7 五、發明説明（1〇) (請先閱讀背面之注意事項再填寫本頁) 又，理想爲：從細腰管1的端面往軸方向伸張，從連 接連結腳9 2的安裝部9 1的軸方向來看的圓周方向的寬 度尺寸t 1或是其平均尺寸，爲連結腳9 2的寬度t 3或 其平均尺寸的2倍以上。又，從安裝部9 1的軸方向來看 的圓周方向的寬度尺寸，相對於內周側寬度尺寸t 1 ，使 內周側寬度尺寸t 2小爲佳。 而且’此連結腳9 2，如第9圖所示，剖面形狀爲圓 形、橢圓或愛形的任一種形狀，也可以得到同樣的效果， '當考慮作爲軸流風扇的性能時，此連結腳9 2的形狀，理 想爲作成具有沿著根據葉片1 0的構造之送風方向的長軸 之橢圓形狀或菱形等的構造，以形成減少風阻的構成。 第3圖所示的實施形態，作爲軸承5 ，係舉例表示複 數個滾珠軸承；但是如第1 3圖所示，金屬軸承、止推軸 承和樞軸承的組合等，也可以得到同樣的效果。 細腰管1的形狀，並不限定於第1圖所示的方形，第 1 0圖（a ) 、（ b )所示的圓形的情況，也具有同樣的 效果。另外，第1 0圖（a )爲前視圖、（b )爲後視 圖。 經濟部智慧財產局員工消費合作社印製 若根據第1圖、第1 〇圖所示的實施形態，細腰管1 或葉片1 0等的材質，除了樹脂以外，鋁或鐵等，也可以 得到同樣的效果。又，定子4、印刷電路基板2的全部或 一部，利用樹脂模鑄處理來構成，也可以得到相同的效 果。 以上所述的實施形態，係將軸流風扇1 〇 〇以嵌入的 本紙張尺度適用中國國家標準（CNS ) A4規格（210X29*7公釐） 588496 Α7 Β7 五、發明説明（11) 方式來安裝在外部裝置中的構成，但是對於使用螺絲等的 固定工具的情況，也可以得到相同的效果。 以上所說明的實施形態，係改變連結部9中的連結腳 9 2的剖面積A和安裝部9 1的剖面積a 1 ，來減少振動 傳達的構成，如此的振動傳達的降低，係藉由改變連結腳 9 2和安裝部9 1的剛性來實現。 使用第1 1圖所示的簡單的振動模式，來說明振動傳 達的降低效果。在第1 1圖的振動模式中，軸流風扇 1 0 0中的除了細腰管1以外的部分的質量爲m、連結腳 9 2的剛性爲k 1、安裝部9 1的剛性爲k 2、電動機位 移爲Z 1 、細腰管1的位移爲z 2。再者，剛性係以楊氏 模數和剖面2次力矩爲變數的函數；剖面2次力矩係以剖 面形狀爲變數的函數。 串聯彈簧的等價剛性K，以下述公式來表示。 【公式1】 丄=丄+丄-三+丄-(α+1) Κ κ, κ2 κ 2 κ 2 (公式 1) 【公式2】 振動傳達率λ、構造的固有角頻率ω ^、無因次化角 頻率ω/ωη，以下述公式來定義。 本紙張尺度適用中國國家標準（CNS ) Α4規格（210Χ297公釐） —-------- (請先閱讀背面之注意事項再填寫本頁) 、1Τ _線 經濟部智慧財產局員工消費合作社印製 -15- 588496 Α7 Β7 五、發明説明（ 【公式3 12) A =—- (公式3 【公式4 Μ (公式4 公式 (公式5 ) 此處，<、α ~爲激振力的角頻率、Γ爲模式減振比 振動傳途命， ，使用無因次化角頻率0/〇 減振比Γ，Ν γ、+ 从下述公式求得。 【公式6 1 和模式 (請先閱讀背面之注意事項再填寫本頁) -裝. 訂 經濟部智慧財產局員工消費合作社印製 λ= 1+(2 … 0^).+(2 ζ25)2 (公式 6 ) It匕處’爲了公式的簡化，將模式減振比Γ假設爲〇， 將連結腳9 2的剛性k 1假設爲安裝部9 1的剛性k 2的 α分之一（α > 1 )，則振動傳達率λ，能夠以下述公式 求得。 【公式7】 本紙張尺度適用中國國家標準（CNS ) Μ規格（2ΐ〇χ 297公鐘：） -16- 588496 A7 B7 五、發明説明（13) Λ = 公式8 ω^ητ) (α+1) 1 1-万 2( α 十 1) (公式7 (公式8 ) 經濟部智慧財產局員工消費合作社印製 將根據上述公式所描述的α = 2、3、4時的振動傳 達率λ，表示於第1 2圖中。根據振動傳達率λ的定義， 在振動傳達率λ小於1的頻帶，從電動機傳達至細腰管1 的振動變小。又，與振動傳達率λ交叉的無因次化角頻率 /3越小，在更低的角頻率，被傳達至細腰管1的振動變 小0 因此，若參照第1 2圖，可知α越大，則振動減低的 效果越大。亦即，連結腳9 2的剛性k 1 ，越小於安裝部 9 1的剛性k 2，則振動減低的效果越大。 例如，與振動傳達率λ = 1交叉的無因次化角頻率 石，當α = 2時，冷=0 · 81 ;而當α = 4時，/5 = 0 · 64。此時，若 k2/.m = (2ττχ 500)χ (2 τΓ χ 5 0 0 )，當 α = 2 時，0 = 27rx4〇〇;a = 4時，ω = 2ττχ 300。再者，與振動傳達率^二1交 叉的無因次化角頻率6；/^ η的値，爲2。 第4圖所示的固有模式的固有振動數若設爲3 8 〇 (請先閱讀背面之注意事項再填寫本頁) •裝· 訂 本紙張尺度適用中國國家標準（CNS ) A4規格（210X297公釐） -17 588496 經濟部智慧財產局工消費合作社印製 A7 ___B7五、發明説明（14) Hz ，當α = 2時，380Hz的振動成分，經由電動機 保持部7、連結腳9 2、安裝部9 1 ，被傳達至細腰管 1 ，因此振動被放大。甚至，由於軸流風扇1 0 0的旋轉 數所決定的電磁力的激振頻率，在3 8 0 Η z附近的情 況，細腰管1的振動更大。 另一方面，α = 4的情況，3 8 0 Η ζ的振動，藉由 振動降低的效果，難以從電動機保持部7傳達至細腰管 卜 結果，安裝部9 1的剛性k 2比連結腳9 2的剛性 k 1大，且藉由設定前述連結腳9 2和安裝部9 1的剛性 k 1 、k 2的比，使得根據連結腳9 2和安裝部9 1的剛 性k 1 、k 2的比、電動機的質量m、及安裝部9 1的剛 性k 2所決定出來的角頻率的，2倍的値，能夠比根據細 腰管1全體的1次變形固有角頻率ω η和存在於此細腰管 1之固有角頻率附近的電動機旋轉數所決定的電磁力的激 振角頻率ω的値小，能夠降低被傳達至細腰管1而放射出 來的刺耳的電磁音。 作爲改變此連結腳9 2的剛性k 1和安裝部9 1的剛 性k 2的手段，除了如前述實施形態般地改變連結腳9 2 的剖面積A和安裝部9 1的剖面積A 1以外，也能夠藉由 改變連結腳9 2和安裝部9 1的材質之構成來實現。對於 以A B S樹脂、P B T樹脂和玻璃纖維所混合而成的樹 脂，將細腰管1、安裝部9 1、連結腳9 2、通電構件收 容連結腳9 3及電動機保持部7 —體地成形的構件，藉由 本紙張尺度適用中國國家標準（CNS )A4規格（210X297公釐） 一—Printed by 8T Consumer Cooperatives, Intellectual Property Bureau, Ministry of Economic Affairs -10- 588496 A7 B7 V. Description of Invention (7) There are models. Fig. 4 is an exaggerated description of the bending vibration state of this natural mode. Although there are many vibration modes, when the axial flow fan 100 is installed in an external device, the vibration emission sound is particularly a problem. The electromagnetic excitation force and the natural mode shown in Fig. 4 resonate. Status. For axial fan 100, those who directly apply electromagnetic excitation force are stator 4 and rotor 3. In addition, the vibration of the axial fan 100 is transmitted to the external device through the narrow waist tube 1. Therefore, even if the vibration of the stator 4, the hub 6, and the motor holding portion 7 is excited due to the electromagnetic excitation force, as long as the vibration is difficult to be transmitted to the thin waist tube 1 through the connection portion 9, the electromagnetic noise can be reduced. Release. Therefore, in this embodiment, the shape and rigidity of the attachment portion 9 1 and the connection leg 92 of the connection portion 9 are appropriately adjusted to reduce transmission from the motor holding portion 7 holding the motor through the connection portion 9. The vibration to the slim waist tube 1 is reduced, and the vibration transmitted from the axial fan 100 to the external device is reduced. As a result, the electromagnetic sound can be reduced. Regarding the refrigerator as an external device, a case where the axial flow fan 100 is installed in the refrigerator will be taken as an example to describe an example and effect of the adaptation of the connecting portion 9. Fig. 5 is a longitudinal sectional side view of a refrigerator 200 equipped with an axial flow fan; the axial flow fan 100 is attached to the outer periphery of a thin waist tube 1 made of resin, and is surrounded by a cushioning material, It is installed in a predetermined position in the refrigerator 200. This paper size applies to China National Standard (CNS) A4 specification (210X 297 mm) II—. II 1 ----I--II! (Please read the precautions on the back before filling this page) Order the intellectual property of the Ministry of Economic Affairs Printed by the Bureau's Consumer Cooperatives -11-588496 Α7 Β7 V. Description of the Invention (8) Axial fan 1 0, which is used as a fan in the refrigerator 2 0 0, when opening the door or drawer, although there is The case of stopping and the case of not stopping are considered here. In such a refrigerator 200, once the door or drawer is opened, the wind-cut sound and electromagnetic sound of the axial fan 100 can be heard. For wind-cut sounds, once the electromagnetic sound in the band of 3 OHz to 100 Hz, which is good for listening, becomes loud, a harsh sound will be heard. In FIG. 6, the cross-sectional area A 1 of the mounting portion 9 1 connected to the connecting leg 9 2 shown in FIG. 2 is, for example, 2.3 times the cross-sectional area A of the connecting leg 9 2. The noise spectrum of the nearby sound field. In this spectrum, the eye-catching spectrum is the frequency band of 4 0 Η z that is one-third the frequency band; this is the spectrum equivalent to electromagnetic sounds and is harsh. Fig. 6 also shows that the cross-sectional area A of the connecting leg 9 2 is made the same area as described above, and the cross-sectional area A 1 of the mounting portion 91 is changed to 3 · 5 of the cross-sectional area A of the connecting leg 9 2. Noise spectrum in the case of double and 4 · 2 times. By changing the cross-sectional area A 1 of the mounting portion 91, although the overall (0 · A ·) is hardly changed, the spectrum of the harsh 40 OHz band can be reduced by about 5 dB. The spectrum of the 4 0 0 Η z band is the spectrum of electromagnetic sounds; the natural mode of the axial fan 100 of this frequency is shown in Figure 4. Observing the eigenmode of Fig. 4, the displacement of the peripheral center portion 1M of the narrow waist tube 1 is large. Fig. 7 shows the vibration transmission rate between the motor holding portion 7 and the central portion 1M of the outer periphery of the narrow waist tube 1. This paper size applies to China National Standard (CNS) Α4 specification (210X 297 mm) ---- I--I batch of clothes __ (Please read the precautions on the back before filling this page), 1T Intellectual Property of the Ministry of Economics Printed by Bureau 8 Industrial Cooperative Cooperative -12- 588496 A7 B7 V. Description of the invention (9) If the transmission rate of vibration near 4 〇 〇 Η z according to Figure 7, the cross-sectional area A 1 of the mounting portion 9 1 is made as In the case where the cross-sectional area A of the connecting leg 9 2 is 2-3 times, the maximum · is 8 · 5; on the other hand, the cross-sectional area a 1 of the mounting portion 9 1 is made 3 as the cross-sectional area A of the connecting leg 9 2. In the case of 5 times, it is about 3 · 2; and in the case where the cross-sectional area A 1 of the mounting portion 9 1 is 4 · 2 times the cross-sectional area A of the connecting leg 9 2, it becomes 1 · 0 or less. This result It means that the cross-sectional area A 1 of the mounting portion 91 is appropriately reduced to reduce the vibration transmission rate in the 4 〇 Ο 频带 z band. Therefore, the cross-sectional area A 1 of the mounting portion 9 1 is used as the cross-sectional area of the connecting leg 9 2. A 3 _ 5 times or more of A has a high practical effect. Therefore, in this embodiment, as long as it is a cause of the occurrence of harsh electromagnetic sounds, the vibration in the z-band, With the structure propagating from the motor holding portion 7 to the thin waist tube 1, the connecting leg 9 2 may have substantially the same cross-sectional area as shown in FIG. 8 (a), or may be as shown in (b). The cross-sectional area of the outer peripheral side end portion of the communication mounting portion 91 is larger than the cross-sectional area of the inner peripheral side end portion of the communication motor holding portion 7, and the average 値 is regarded as the cross-sectional area A. Similarly, during the installation In the part 91, the width in the circumferential direction viewed from the axial direction, as shown in FIG. 8 (c), may be formed such that the front end portion of the communication connecting leg 92 is small and the root end of the end surface of the communication wind tunnel portion is large. Let the average 値 be the cross-sectional area A 1. The cross-sectional area of the connecting leg 9 2 as the cross-sectional area of the outer peripheral end portion communicating with the mounting portion 9 1 is greater than the inner peripheral side end portion communicating with the motor holding portion 7. The structure with a large cross-sectional area is ideal not to increase the width dimension t 3 in the circumferential direction, but to increase the width dimension t 4 in the axial direction toward the exhaust side. This paper size applies the Chinese National Standard (CNS) A4 specification (210X297 Mm) nn H —ϋ ί U ί nm I (Please read the note on the back first Please fill in this page again) Printed by the Consumer Cooperative of the Intellectual Property Bureau of the Ministry of Economic Affairs-13- 588496 A7; ___ B7 V. Description of Invention (1〇) (Please read the notes on the back before filling this page) Also, ideal To extend from the end surface of the thin waist tube 1 in the axial direction, and the width dimension t 1 or the average dimension of the circumferential direction viewed from the axial direction of the mounting portion 9 1 of the connection leg 9 2 is the length of the connection leg 9 2. Width t 3 or more than twice its average size. The width dimension in the circumferential direction viewed from the axial direction of the mounting portion 91 is preferably smaller than the inner peripheral width dimension t 1. And 'this connecting foot 92, as shown in Fig. 9, the cross-sectional shape is any of circular, elliptical or love-shaped, and the same effect can be obtained.' When considering the performance of an axial flow fan, this connection The shape of the foot 92 is preferably a structure having an elliptical shape or a rhombus having a long axis along the air blowing direction according to the structure of the blade 10 to form a structure that reduces wind resistance. The embodiment shown in FIG. 3 shows a plurality of ball bearings as an example of the bearing 5. However, as shown in FIG. 13, a combination of a metal bearing, a thrust bearing, and a pivot bearing can also achieve the same effect. The shape of the narrow waist tube 1 is not limited to the square shape shown in FIG. 1, and the same effect can be obtained in the case of the circle shown in FIGS. 10 (a) and (b). Fig. 10 (a) is a front view and (b) is a rear view. Printed by the Consumer Cooperative of the Intellectual Property Bureau of the Ministry of Economic Affairs. According to the embodiment shown in Fig. 1 and Fig. 10, in addition to resin, aluminum, iron, etc., other materials such as thin waist tube 1 or blade 10 can also be obtained. The same effect. In addition, all or a part of the stator 4 and the printed circuit board 2 are formed by a resin molding process, and the same effect can be obtained. In the above-mentioned embodiment, the axial flow fan 100 is applied to the paper size embedded in this paper to apply the Chinese National Standard (CNS) A4 specification (210X29 * 7 mm) 588496 Α7 B7 5. Installation of the invention (11) In the configuration of the external device, the same effect can be obtained even when a fixing tool such as a screw is used. In the embodiment described above, the cross-sectional area A of the connecting leg 9 2 in the connecting portion 9 and the cross-sectional area a 1 of the mounting portion 9 1 are changed to reduce the structure of vibration transmission. Such a reduction in vibration transmission is achieved by This is achieved by changing the rigidity of the connecting leg 92 and the mounting portion 91. The simple vibration mode shown in Fig. 11 is used to explain the reduction effect of vibration transmission. In the vibration mode of FIG. 11, the mass of the axial flow fan 100 except the thin waist tube 1 is m, the rigidity of the connecting leg 9 2 is k 1, and the rigidity of the mounting portion 9 1 is k 2. The displacement of the motor is Z 1 and the displacement of the thin waist tube 1 is z 2. Furthermore, the rigidity is a function of the Young's modulus and the second-order moment of the section as a variable; the second-order moment of the section is a function of the shape of the section as a variable. The equivalent rigidity K of the series spring is expressed by the following formula. [Formula 1] 丄 = 丄 + 丄-三 + 丄-(α + 1) κ κ, κ2 κ 2 κ 2 (Formula 1) [Formula 2] Vibration transmission rate λ, natural angular frequency ω ^ of the structure, and no cause The secondary angular frequency ω / ωη is defined by the following formula. This paper size is applicable to China National Standard (CNS) A4 specification (210 × 297 mm) —-------- (Please read the precautions on the back before filling this page), 1T _Employee Consumption of Intellectual Property Bureau, Ministry of Economic Affairs Printed by the cooperative -15- 588496 Α7 Β7 V. Description of the invention ([Formula 3 12) A = —- (Formula 3 [Formula 4 Μ (Formula 4 Formula (Formula 5)) Here, <, α ~ are the exciting forces Angular frequency, Γ is the vibration damping ratio of the mode vibration reduction ratio, and is obtained using the dimensionless angular frequency 0/0 vibration reduction ratio Γ, N γ, + from the following formula. [Equation 6 1 and mode (please (Please read the notes on the back before filling this page)-Install. Order printed by the Consumer Cooperatives of the Intellectual Property Bureau of the Ministry of Economic Affairs λ = 1+ (2… 0 ^). + (2 ζ25) 2 (Formula 6) To simplify the formula, let the mode vibration reduction ratio Γ be assumed as 0, and the rigidity k 1 of the connecting leg 9 2 be assumed to be a fraction of α (α > 1) of the rigidity k 2 of the mounting portion 9 1, then the vibration transmission rate λ can be obtained by the following formula: [Equation 7] This paper size applies the Chinese National Standard (CNS) M specification (2ΐ〇χ 297 clocks :) -16- 588496 A7 B 7 V. Description of the invention (13) Λ = formula 8 ω ^ ητ) (α + 1) 1 1-10,000 2 (α ten 1) (Formula 7 (Formula 8) The printing of the employee consumer cooperative of the Intellectual Property Bureau of the Ministry of Economic Affairs will be based on The vibration transmission rate λ when α = 2, 3, and 4 described in the above formula is shown in Figure 12. According to the definition of the vibration transmission rate λ, in the frequency band where the vibration transmission rate λ is less than 1, it is transmitted from the motor to the fine The vibration of the waist tube 1 becomes smaller. The smaller the dimensionless angular frequency / 3 that crosses the vibration transmission rate λ is, the lower the angular frequency, the vibration transmitted to the thin waist tube 1 becomes smaller. Therefore, if Referring to FIG. 12, it can be seen that the larger α is, the larger the vibration reduction effect is. That is, the smaller the rigidity k 1 of the connecting leg 9 2 is smaller than the rigid k 2 of the mounting portion 9 1, the larger the vibration reduction effect is. For example, for a dimensionless angular frequency stone that crosses the vibration transmission rate λ = 1, when α = 2, cold = 0.81; and when α = 4, / 5 = 0 · 64. At this time, if k2 / .m = (2ττχ 500) χ (2 τΓ χ 5 0 0), when α = 2, 0 = 27rx4〇〇; a = 4, ω = 2ττχ 300. Moreover, the vibration transmission rate is ^ 2 1 Crossed dimensionless The frequency of 6; / ^ η is 2. If the natural vibration number of the natural mode shown in Figure 4 is set to 3 8 〇 (Please read the precautions on the back before filling this page) • Binding and binding paper size Applicable to China National Standard (CNS) A4 specification (210X297 mm) -17 588496 Printed by A7, Industrial Property and Consumer Cooperatives of the Ministry of Economic Affairs ___B7 V. Description of the invention (14) Hz, when α = 2, the vibration component of 380Hz passes through Since the motor holding portion 7, the connecting leg 9, and the mounting portion 9 1 are transmitted to the thin waist tube 1, the vibration is amplified. Furthermore, the vibration frequency of the thin waist tube 1 is larger due to the excitation frequency of the electromagnetic force determined by the number of rotations of the axial fan 100. When the frequency is near 3800 Η z. On the other hand, in the case of α = 4, the vibration of 3 8 0 Η ζ is difficult to be transmitted from the motor holding portion 7 to the thin waist tube due to the effect of vibration reduction. As a result, the rigidity k 2 of the mounting portion 9 1 is higher than that of the connecting leg. The rigidity k 1 of 9 2 is large, and by setting the ratio of the rigidity k 1, k 2 of the connecting leg 9 2 and the mounting portion 9 1, the rigidity k 1, k 2 of the connecting leg 9 2 and the mounting portion 9 1 is set. The ratio of the angular frequency determined by the ratio of the mass m of the motor and the rigidity k 2 of the mounting portion 9 1 is twice as high as 値, which can be compared with the natural angular frequency ω η and The excitation angular frequency ω of the electromagnetic force determined by the number of motor rotations around the natural angular frequency of the narrow waist tube 1 is small, and the harsh electromagnetic sound transmitted to the narrow waist tube 1 can be reduced. As a means for changing the rigidity k 1 of the connecting leg 9 2 and the rigidity k 2 of the mounting portion 9 1, except for changing the cross-sectional area A of the connecting leg 9 2 and the cross-sectional area A 1 of the mounting portion 9 1 as in the aforementioned embodiment. It can also be realized by changing the material configuration of the connecting leg 92 and the mounting portion 91. For the resin made of ABS resin, PBT resin and glass fiber, the thin waist tube 1, the mounting portion 9 1, the connecting leg 9 2, the current-carrying member housing connecting leg 9 3, and the motor holding portion 7 are integrally formed. Component, with this paper size applicable to China National Standard (CNS) A4 specification (210X297 mm)
C锖先聞讀背希之法意事項#填寫本裒J •裝· -I: I - 588496 A7 B7 五、發明説明（15) 改變安裝部9 1的部分和連結腳9 2 (通電構件收容連結 腳9 3 )的部分的混合比例，能夠改變剛性。 又，以相同材質的樹脂來將細腰管1、安裝部9 1、 連結腳9 2成形的情況，藉由將鐵板等的補強材置入安裝 部9 1的內部，也可以改變剛性。 【發明之效果】 本發明的軸流風扇，能夠抑制由於電動機的驅動動作 所產生的振動，特別是在構裝狀態下，能夠有效地抑制電 磁音的頻帶（frequency band)的振動，傳播至外部裝置。 【圖式簡單說明】 第1圖係表示本發明的軸流風扇的一實施形態之前視 圖和部份擴大圖。 第2圖係第1圖所示的軸流風扇中的C - C剖面圖和 D - D剖面圖。 第3圖係第1圖所示的軸流風扇的縱剖側視圖。 第4圖係表示軸流風扇的固有模式的圖。 第5圖係表示安裝有軸流風扇的冷藏庫的槪要的縱剖 側視圖。 第6圖係比較軸流風扇的噪音頻譜的圖表。 第7圖係表示在軸流風扇中的電動機保持部和細腰管 之間的振動傳達率的圖表。 第8圖係表示第1圖所示的軸流風扇的連結部和其變 (請先閱讀背面之注意事項再填寫本頁) •裝· 經濟部智慧財產局員工消費合作社印製 本紙張尺度適用中國國家標準（CNS ) A4規格（210X 297公釐） -19- 經濟部智慧財產局員工消費合作社印製 588496 A7 ___ B7_ 五、發明説明（16) 化例的側視圖。 第9圖係表示第1圖所示的軸流風扇的連結腳的變化 例之該連結腳的剖面圖。 第1 0圖係表示本發明的其他實施形態的軸流風扇的 前視圖和後視圖。 第1 1圖係表示軸流風扇的振動模型的圖。 第1 2圖係第1 1圖所示的振動模型中的振動傳達率 的圖表。 第1 3圖係表示第1圖所示的軸流風扇的變化例的縱 剖側視圖。 【符號說明】 1 =細腰管 2:印刷電路基板 3 :轉子 4 :定子 5 :軸承 6 :輪轂 7:電動機保持部 8 :軸 9 :連結部 1 0 :葉片 1 1 :永久磁鐵 12:電動機通電構件 本紙張尺度適用中國國家標準（CNS ) A4規格（210X29?公釐） (請先閲讀背面之注意事項再填寫本頁)C 锖 先 读读 背 希 的 法 意 事 #Fill in this book J • Equipment · -I: I-588496 A7 B7 V. Description of the invention (15) Change the part of the mounting part 9 1 and the connecting leg 9 2 The mixing ratio of the portion connecting the legs 9 3) can change the rigidity. When the thin waist tube 1, the mounting portion 91, and the connecting leg 92 are formed of a resin of the same material, the rigidity can be changed by inserting a reinforcing material such as an iron plate into the mounting portion 91. [Effects of the Invention] The axial flow fan of the present invention can suppress the vibration caused by the driving action of the motor, and especially in the structured state, it can effectively suppress the vibration of the frequency band of electromagnetic sound and propagate to the outside Device. [Brief Description of the Drawings] FIG. 1 is a front view and a partially enlarged view showing an embodiment of the axial flow fan according to the present invention. Fig. 2 is a sectional view taken along the line C-C and a sectional view taken along the line D-D in the axial flow fan shown in Fig. 1. Fig. 3 is a longitudinal sectional side view of the axial fan shown in Fig. 1. Fig. 4 is a view showing a specific mode of the axial fan. Fig. 5 is a schematic longitudinal sectional side view of the refrigerator to which an axial flow fan is installed. Figure 6 is a graph comparing the noise spectrum of an axial fan. Fig. 7 is a graph showing a vibration transmission rate between a motor holding portion and a thin waist tube in an axial fan. Figure 8 shows the connection of the axial fan shown in Figure 1 and its changes (please read the precautions on the back before filling out this page) China National Standard (CNS) A4 specification (210X 297 mm) -19- Printed by the Consumer Cooperatives of the Intellectual Property Bureau of the Ministry of Economic Affairs 588496 A7 ___ B7_ 5. Side view of the invention. Fig. 9 is a cross-sectional view of an example of a connection leg of the axial fan shown in Fig. 1; Fig. 10 is a front view and a rear view of an axial fan according to another embodiment of the present invention. FIG. 11 is a diagram showing a vibration model of an axial flow fan. Fig. 12 is a graph of the vibration transmission rate in the vibration model shown in Fig. 11. Fig. 13 is a longitudinal sectional side view showing a modification of the axial fan shown in Fig. 1. [Symbol description] 1 = Slim waist tube 2: Printed circuit board 3: Rotor 4: Stator 5: Bearing 6: Hub 7: Motor holding part 8: Shaft 9: Connecting part 1 0: Blade 1 1: Permanent magnet 12: Motor Powered components This paper is sized for Chinese National Standard (CNS) A4 (210X29? Mm) (Please read the precautions on the back before filling this page)
-20- 588496 經濟部智慧財產局員工消費合作社印製 A7 B7 五、發明説明（17) 91:安裝部 9 2 :連結腳 9 3 :通電構件收容連結腳 A:連結腳的剖面積 A 1 :安裝部的剖面積 1 0 0 :軸流風扇 2 0〇：冷藏庫 本紙張尺度適用中國國家標準（CNS ) A4規格（210X 297公釐） (請先閱讀背面之注意事項再填寫本頁)-20- 588496 Printed by the Consumers ’Cooperative of the Intellectual Property Bureau of the Ministry of Economic Affairs A7 B7 V. Description of the invention (17) 91: Mounting section 9 2: Connection foot 9 3: Current-carrying member housing connection foot A: Cross-sectional area of connection foot A 1: Mounting section cross-section area 100: Axial flow fan 2000: The paper size of the refrigerator applies the Chinese National Standard (CNS) A4 specification (210X 297 mm) (Please read the precautions on the back before filling this page)
-21 --twenty one -