TWI681127B - Centrifugal fan and impeller thereof - Google Patents

Centrifugal fan and impeller thereof Download PDF

Info

Publication number
TWI681127B
TWI681127B TW107103656A TW107103656A TWI681127B TW I681127 B TWI681127 B TW I681127B TW 107103656 A TW107103656 A TW 107103656A TW 107103656 A TW107103656 A TW 107103656A TW I681127 B TWI681127 B TW I681127B
Authority
TW
Taiwan
Prior art keywords
hub
blades
fan
outer diameter
connecting ring
Prior art date
Application number
TW107103656A
Other languages
Chinese (zh)
Other versions
TW201934879A (en
Inventor
洪銀樹
蘇家宏
Original Assignee
大陸商佛山市建準電子有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 大陸商佛山市建準電子有限公司 filed Critical 大陸商佛山市建準電子有限公司
Priority to TW107103656A priority Critical patent/TWI681127B/en
Priority to CN201810160050.4A priority patent/CN110107514A/en
Publication of TW201934879A publication Critical patent/TW201934879A/en
Application granted granted Critical
Publication of TWI681127B publication Critical patent/TWI681127B/en

Links

Images

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D17/00—Radial-flow pumps, e.g. centrifugal pumps; Helico-centrifugal pumps
    • F04D17/08—Centrifugal pumps
    • F04D17/16—Centrifugal pumps for displacing without appreciable compression
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D25/00—Pumping installations or systems
    • F04D25/02—Units comprising pumps and their driving means
    • F04D25/06—Units comprising pumps and their driving means the pump being electrically driven
    • F04D25/0606—Units comprising pumps and their driving means the pump being electrically driven the electric motor being specially adapted for integration in the pump
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D25/00—Pumping installations or systems
    • F04D25/02—Units comprising pumps and their driving means
    • F04D25/08—Units comprising pumps and their driving means the working fluid being air, e.g. for ventilation
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D29/00—Details, component parts, or accessories
    • F04D29/26—Rotors specially for elastic fluids
    • F04D29/28—Rotors specially for elastic fluids for centrifugal or helico-centrifugal pumps for radial-flow or helico-centrifugal pumps
    • F04D29/281—Rotors specially for elastic fluids for centrifugal or helico-centrifugal pumps for radial-flow or helico-centrifugal pumps for fans or blowers
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D29/00—Details, component parts, or accessories
    • F04D29/26—Rotors specially for elastic fluids
    • F04D29/28—Rotors specially for elastic fluids for centrifugal or helico-centrifugal pumps for radial-flow or helico-centrifugal pumps
    • F04D29/30—Vanes
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D29/00—Details, component parts, or accessories
    • F04D29/66—Combating cavitation, whirls, noise, vibration or the like; Balancing
    • F04D29/661—Combating cavitation, whirls, noise, vibration or the like; Balancing especially adapted for elastic fluid pumps
    • F04D29/666—Combating cavitation, whirls, noise, vibration or the like; Balancing especially adapted for elastic fluid pumps by means of rotor construction or layout, e.g. unequal distribution of blades or vanes

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)

Abstract

A centrifugal fan and an impeller thereof are provided to overcome the difficulty in reducing the noise of the conventional centrifugal fan. The centrifugal fan according to the invention includes a base having a shaft tube, a stator unit mounted around the shaft tube, and an impeller having a shaft connected to a hub. The shaft is rotatably received in the shaft tube. A plurality of blades is mounted on an outer periphery of the hub. Each of the blade includes a highest top face higher than a top face of the hub. The outer edges of the blades define a maximal outer diameter. A ratio of an outer diameter of the hub to the maximal outer diameter is larger than 0.4, or is equal to or smaller than 0.5.

Description

離心扇及其扇輪 Centrifugal fan and its fan wheel

本發明係關於一種離心扇及其扇輪，尤其是一種無外框而可直接組裝在如冷凍櫃或冰箱等系統中的離心扇及其扇輪。 The invention relates to a centrifugal fan and its fan wheel, in particular to a centrifugal fan and its fan wheel that can be directly assembled in a system such as a freezer or refrigerator without a frame.

請參照第1、2圖，其係一種習知的離心扇9，該習知的離心扇9具有一基座91、一扇輪92及一定子組93，該基座91具有一中柱911，該扇輪92具有一轉軸921連接一輪轂922，該轉軸921可旋轉地設於該中柱911，數個扇葉923分別由一端連接該輪轂922的外表面，該定子組93設於該中柱911的外周。該習知的離心扇9可直接將該基座91組裝定位在如冷凍櫃或冰箱等系統中，以藉由該扇輪92的旋轉，帶動氣流從系統殼體上所開設的入風口流入系統內部，再從系統殼體上所開設的出風口排出至外界。類似於該習知離心扇9的數個實施例已揭露於中華民國公開第200838396號、公告第I530777號及第I529309號等專利案當中。 Please refer to FIG. 1 and FIG. 2, which is a conventional centrifugal fan 9, the conventional centrifugal fan 9 has a base 91, a fan 92 and a certain sub-group 93, the base 91 has a center column 911 The fan wheel 92 has a rotating shaft 921 connected to a hub 922, the rotating shaft 921 is rotatably disposed on the center pillar 911, a plurality of fan blades 923 are respectively connected to the outer surface of the hub 922 from one end, and the stator group 93 is disposed on the The outer periphery of the center pillar 911. The conventional centrifugal fan 9 can directly assemble and position the base 91 in a system such as a freezer or a refrigerator, so that the rotation of the fan wheel 92 can drive the air flow into the system from the air inlet opened on the system casing Inside, it is discharged to the outside from the air outlet opened on the system casing. Several embodiments similar to the conventional centrifugal fan 9 have been disclosed in the patent cases published by Republic of China No. 200838396, Announcements No. I530777 and No. I529309.

然而，由於該習知離心扇9的各該扇葉923頂緣都與該輪轂922的頂緣同高，或是低於該輪轂922的頂緣，使得氣流進入該扇輪92的旋轉範圍後，首先會衝向該輪轂922的頂緣，才被該數個扇葉923所擾動而流向側端；據此，該習知離心扇9的運作噪音一直以來都有難以降低的瓶頸。此外，經實驗發現，不僅僅是氣流衝向該輪轂922頂緣的問題，該扇輪92中除了該轉軸921以外的其他構件型態及尺寸比例，也都會對運作噪音造成不同程度的影響。 However, since the top edge of each blade 923 of the conventional centrifugal fan 9 is the same height as or lower than the top edge of the hub 922, the airflow enters the rotation range of the fan 92 First, it will rush towards the top edge of the hub 922 before it is disturbed by the several blades 923 and flows to the side end; accordingly, the operation noise of the conventional centrifugal fan 9 has always had a bottleneck that is difficult to reduce. In addition, it has been found through experiments that not only is the problem of airflow rushing toward the top edge of the hub 922, but also the shape and size ratio of the other components of the fan 92 except the rotating shaft 921, which will also affect the operating noise to varying degrees.

有鑑於此，習知的離心扇確實仍有加以改善之必要。 In view of this, the conventional centrifugal fan does still need to be improved.

為解決上述問題，本發明之目的係提供一種離心扇及其扇輪，可提升氣流的流動順暢度，以降低運作噪音。 In order to solve the above problems, the object of the present invention is to provide a centrifugal fan and its fan wheel, which can improve the smoothness of the air flow and reduce the operation noise.

本發明以下所述方向性或其近似用語，例如「前」、「後」、「上(頂)」、「下(底)」、「內」、「外」、「側面」等，主要係參考附加圖式的方向，各方向性或其近似用語僅用以輔助說明及理解本發明的各實施例，非用以限制本發明。 The following directivity or similar terms of the present invention, such as "front", "rear", "upper (top)", "lower (bottom)", "inner", "outer", "side", etc., mainly With reference to the directions of the attached drawings, each directivity or its approximate terms are only used to help explain and understand the embodiments of the present invention, and are not intended to limit the present invention.

本發明的離心扇，包含：一基座，該基座具有一軸管；一定子組，該定子組設於該軸管的外周；及一扇輪，該扇輪具有一轉軸及一連接環，該轉軸連接一輪轂，該轉軸可旋轉地設於該軸管，數個扇葉環設於該輪轂的外周，該連接環連接該數個扇葉，該連接環具有數個肋條以形成有數個配重槽；其中，各該扇葉具有一最高頂緣，各該最高頂緣高出該輪轂的頂緣；該數個扇葉的外緣形成一最大外徑，該輪轂的外徑與該最大外徑的比值大於0.4且小於或等於0.5。 The centrifugal fan of the present invention includes: a base with a shaft tube; a certain subgroup, the stator group is disposed on the outer periphery of the shaft tube; and a fan wheel with a rotating shaft and a connecting ring, The rotating shaft is connected with a hub, the rotating shaft is rotatably provided on the shaft tube, a plurality of fan blade rings are provided on the outer periphery of the hub, the connecting ring is connected with the several fan blades, the connecting ring has a plurality of ribs to form a plurality of Counterweight groove; wherein, each of the blades has a highest top edge, each of the highest top edges is higher than the top edge of the hub; the outer edges of the several blades form a maximum outer diameter, the outer diameter of the hub and the The ratio of the maximum outer diameter is greater than 0.4 and less than or equal to 0.5.

據此，本發明的離心扇，可藉由使各扇葉的最高頂緣高出輪轂的頂緣，以及使扇輪中除了轉軸以外的其他構件維持特定型態及尺寸比例，從而提升該離心扇運作時導引氣流流動的順暢度，有效達到降低運作噪音等功效。 According to this, the centrifugal fan of the present invention can improve the centrifuge by making the highest top edge of each blade higher than the top edge of the hub and maintaining the specific shape and size ratio of other components in the fan wheel except the rotating shaft When the fan is in operation, the smoothness of the air flow is guided, which effectively reduces the operating noise.

其中，該輪轂具有一軸向延伸部，所述該輪轂的外徑為該軸向延伸部的外徑。如此，該輪轂的結構簡易而可便於製造及組裝，具有降低製造成本及提升組裝便利性等功效。 Wherein, the hub has an axial extension, and the outer diameter of the hub is the outer diameter of the axial extension. In this way, the structure of the hub is simple and easy to manufacture and assemble, which has the effects of reducing manufacturing costs and improving assembly convenience.

其中，在該轉軸的軸向上，該輪轂的頂緣與各該扇葉的最高頂緣相距一軸向間距，各該扇葉具有一最大軸向高度，該軸向間距不大於該最大軸向高度的二分之一。如此，可具有更佳的導引氣流及降低運作噪 音等效果。 Wherein, in the axial direction of the rotating shaft, the top edge of the hub is separated from the highest top edge of each blade by an axial distance, each blade has a maximum axial height, and the axial distance is not greater than the maximum axial Half of the height. In this way, it can have better guided air flow and reduce operating noise Sound effects.

其中，該扇輪具有一延伸盤，該延伸盤連接該輪轂並沿該轉軸的徑向朝外延伸，該數個扇葉的底緣連接該延伸盤，該連接環與該延伸盤相間隔。如此，具有穩固該數個扇葉等功效。 Wherein, the fan wheel has an extension disk, the extension disk is connected to the hub and extends outward in the radial direction of the rotating shaft, the bottom edges of the blades are connected to the extension disk, and the connecting ring is spaced from the extension disk. In this way, it has the effect of stabilizing the several fan blades.

其中，在該轉軸的徑向上，該數個扇葉的最大外徑小於或等於該連接環的外徑。如此，可使各該扇葉的外緣不凸出該連接環，具有避免該連接環影響到各該扇葉的導風效果等功效。 Wherein, in the radial direction of the rotating shaft, the maximum outer diameter of the blades is less than or equal to the outer diameter of the connecting ring. In this way, the outer edge of each fan blade does not protrude from the connecting ring, which has the effect of preventing the connecting ring from affecting the wind guiding effect of each fan blade.

其中，該數個扇葉及該連接環一體成型相連接，該連接環的內徑大於或等於該數個扇葉底緣的外徑。如此，具有提升製造便利性並確保成品可順利離模等功效。 Wherein, the several fan blades and the connecting ring are integrally formed and connected, and the inner diameter of the connecting ring is greater than or equal to the outer diameter of the bottom edges of the several fan blades. In this way, it has the functions of enhancing manufacturing convenience and ensuring that the finished product can be smoothly released from the mold.

其中，該連接環的內周面連接於該數個扇葉的外緣。如此，可確保該連接環之設置不會影響進風。 Wherein, the inner circumferential surface of the connecting ring is connected to the outer edges of the several blades. In this way, it can be ensured that the setting of the connecting ring does not affect the air intake.

其中，該基座具有一基板，該軸管設於該基板，該基板具有相對的一上表面及一下表面，該基板軸向對應於該扇輪的範圍內呈封閉狀，使該上表面與該下表面不連通。如此，可減少不必要的氣流流失及擾流現象，具有提升氣流順暢度及降低運作噪音等功效。 Wherein, the base has a base plate, and the shaft tube is provided on the base plate. The base plate has an upper surface and a lower surface opposite to each other. The base plate is closed within the range corresponding to the fan wheel, so that the upper surface is The lower surface is not connected. In this way, unnecessary air loss and turbulence phenomena can be reduced, which has the effects of improving the smoothness of the air flow and reducing operating noise.

其中，該基座具有一基板，該軸管設於該基板，該基座在該基板的周緣設有數個凸耳，各該凸耳設有一定位孔，各該凸耳結合有一彈性墊，該彈性墊包覆該凸耳的上、下表面且不完全遮蔽該定位孔。如此，可利用鎖固件將該基座組裝定位在系統殼體中的預定位置，並由該彈性墊貼接該系統殼體以吸收震動，具有改善震動噪音等功效。 Wherein, the base has a base plate, the shaft tube is provided on the base plate, the base is provided with a plurality of lugs on the periphery of the base plate, each lug is provided with a positioning hole, and each lug is combined with an elastic pad, the The elastic pad covers the upper and lower surfaces of the lug and does not completely cover the positioning hole. In this way, the base can be assembled and positioned at a predetermined position in the system housing by using a fastener, and the elastic pad can be attached to the system housing to absorb vibration and improve vibration noise.

本發明另提供一種離心扇的扇輪，包含：一轉軸；一輪轂，該輪轂連接該轉軸；數個扇葉，該數個扇葉環設於該輪轂的外周；及一連接環，該連接環連接該數個扇葉，該連接環具有數個肋條以形成有數個配重槽；其中，各該扇葉具有一最高頂緣，各該最高頂緣高出該輪轂的頂緣； 該數個扇葉的外緣形成一最大外徑，該輪轂的外徑與該最大外徑的比值大於0.4且小於或等於0.5。如此，具有降低運作噪音等功效。 The invention also provides a fan wheel of a centrifugal fan, comprising: a rotating shaft; a hub connected to the rotating shaft; a plurality of fan blades, the plurality of fan blade rings are provided on the outer periphery of the hub; and a connecting ring, the connection The ring connects the blades, and the connecting ring has a plurality of ribs to form a plurality of weight grooves; wherein each blade has a highest top edge, and each of the highest top edges is higher than the top edge of the hub; The outer edges of the blades form a maximum outer diameter, and the ratio of the outer diameter of the hub to the maximum outer diameter is greater than 0.4 and less than or equal to 0.5. In this way, it has the effect of reducing operating noise.

其中，該輪轂具有一軸向延伸部，所述該輪轂的外徑為該軸向延伸部的外徑。如此，該輪轂的結構簡易而可便於製造及組裝，具有降低製造成本及提升組裝便利性等功效。 Wherein, the hub has an axial extension, and the outer diameter of the hub is the outer diameter of the axial extension. In this way, the structure of the hub is simple and easy to manufacture and assemble, which has the effects of reducing manufacturing costs and improving assembly convenience.

其中，在該轉軸的軸向上，該輪轂的頂緣與各該扇葉的最高頂緣相距一軸向間距，各該扇葉具有一最大軸向高度，該軸向間距不大於該最大軸向高度的二分之一。如此，可具有更佳的導引氣流及降低運作噪音等效果。 Wherein, in the axial direction of the rotating shaft, the top edge of the hub is separated from the highest top edge of each blade by an axial distance, each blade has a maximum axial height, and the axial distance is not greater than the maximum axial Half of the height. In this way, it can have better effects of guiding airflow and reducing operation noise.

其中，該扇輪具有一延伸盤，該延伸盤連接該輪轂並沿該轉軸的徑向朝外延伸，該數個扇葉的底緣連接該延伸盤，該連接環與該延伸盤相間隔。如此，具有穩固該數個扇葉等功效。 Wherein, the fan wheel has an extension disk, the extension disk is connected to the hub and extends outward in the radial direction of the rotating shaft, the bottom edges of the blades are connected to the extension disk, and the connecting ring is spaced from the extension disk. In this way, it has the effect of stabilizing the several fan blades.

其中，在該轉軸的徑向上，該數個扇葉的最大外徑小於或等於該連接環的外徑。如此，可使各該扇葉的外緣不凸出該連接環，具有避免該連接環影響到各該扇葉的導風效果等功效。 Wherein, in the radial direction of the rotating shaft, the maximum outer diameter of the blades is less than or equal to the outer diameter of the connecting ring. In this way, the outer edge of each fan blade does not protrude from the connecting ring, which has the effect of preventing the connecting ring from affecting the wind guiding effect of each fan blade.

其中，該數個扇葉及該連接環一體成型相連接，該連接環的內徑大於或等於該數個扇葉底緣的外徑。如此，具有提升製造便利性並確保成品可順利離模等功效。 Wherein, the several fan blades and the connecting ring are integrally formed and connected, and the inner diameter of the connecting ring is greater than or equal to the outer diameter of the bottom edges of the several fan blades. In this way, it has the functions of enhancing manufacturing convenience and ensuring that the finished product can be smoothly released from the mold.

其中，該連接環的內周面連接於該數個扇葉的外緣。如此，可確保該連接環之設置不會影響進風。 Wherein, the inner circumferential surface of the connecting ring is connected to the outer edges of the several blades. In this way, it can be ensured that the setting of the connecting ring does not affect the air intake.

〔本發明〕 〔this invention〕

1‧‧‧基座 1‧‧‧Dock

11‧‧‧基板 11‧‧‧ substrate

11a‧‧‧上表面 11a‧‧‧Upper surface

11b‧‧‧下表面 11b‧‧‧Lower surface

12‧‧‧軸管 12‧‧‧Shaft tube

13‧‧‧凸耳 13‧‧‧ lug

131‧‧‧定位孔 131‧‧‧Locating hole

2‧‧‧定子組 2‧‧‧Stator

21‧‧‧鐵芯 21‧‧‧Iron core

22‧‧‧線圈組 22‧‧‧coil set

3‧‧‧扇輪 3‧‧‧fan wheel

31‧‧‧轉軸 31‧‧‧spindle

32‧‧‧輪轂 32‧‧‧Wheel

321‧‧‧軸向延伸部 321‧‧‧Axial extension

33‧‧‧扇葉 33‧‧‧ fan blade

331‧‧‧最高頂緣 331‧‧‧Highest top edge

332‧‧‧外緣 332‧‧‧Outer edge

333‧‧‧底緣 333‧‧‧Bottom edge

34‧‧‧磁性件 34‧‧‧Magnetic parts

35‧‧‧延伸盤 35‧‧‧Extended plate

36‧‧‧連接環 36‧‧‧Connecting ring

361‧‧‧內周面 361‧‧‧Inner peripheral surface

362‧‧‧配重槽 362‧‧‧ Counterweight slot

4‧‧‧彈性墊 4‧‧‧Elastic pad

D1‧‧‧最大外徑 D1‧‧‧Maximum outer diameter

d1‧‧‧外徑 d1‧‧‧Outer diameter

D2‧‧‧外徑 D2‧‧‧Outer diameter

d2‧‧‧內徑 d2‧‧‧Inner diameter

D3‧‧‧外徑 D3‧‧‧Outer diameter

H‧‧‧最大軸向高度 H‧‧‧Maximum axial height

h‧‧‧軸向間距 h‧‧‧Axial spacing

〔習用〕 〔Convention〕

9‧‧‧離心扇 9‧‧‧Centrifugal fan

91‧‧‧基座 91‧‧‧Dock

911‧‧‧中柱 911‧‧‧Central column

92‧‧‧扇輪 92‧‧‧fan wheel

921‧‧‧轉軸 921‧‧‧spindle

922‧‧‧輪轂 922‧‧‧Wheel

923‧‧‧扇葉 923‧‧‧fan blade

93‧‧‧定子組 93‧‧‧Stator

第1圖：一種習知離心扇的立體結構示意圖。 Figure 1: Schematic diagram of a three-dimensional structure of a conventional centrifugal fan.

第2圖：一種習知離心扇的剖視結構示意圖。 Fig. 2: A schematic sectional view of a conventional centrifugal fan.

第3圖：本發明離心扇一實施例的立體結構示意圖。 Figure 3: Schematic diagram of a three-dimensional structure of an embodiment of the centrifugal fan of the present invention.

第4圖：本發明離心扇一實施例的剖視結構示意圖。 Fig. 4: A schematic sectional view of an embodiment of a centrifugal fan of the present invention.

第5圖：本發明扇輪一實施例的立體結構示意圖。 Fig. 5: A schematic view of a three-dimensional structure of an embodiment of a fan wheel of the present invention.

為讓本發明之上述及其他目的、特徵及優點能更明顯易懂，下文特舉本發明之較佳實施例，並配合所附圖式，作詳細說明如下：請參照第3、4圖，其係本發明離心扇的一較佳實施例，該離心扇大致上包含一基座1、一定子組2及一扇輪3，該定子組2及該扇輪3均組裝於該基座1。 In order to make the above and other objects, features and advantages of the present invention more obvious and understandable, the preferred embodiments of the present invention are described below in conjunction with the attached drawings, which are described in detail as follows: Please refer to Figures 3 and 4. It is a preferred embodiment of the centrifugal fan of the present invention. The centrifugal fan generally includes a base 1, a certain sub-group 2 and a fan wheel 3, the stator group 2 and the fan wheel 3 are assembled on the base 1 .

該基座1具有一基板11及一軸管12，該軸管12可以結合該基板11，或是較佳使該軸管12與該基板11一體成型相連，進而簡化該基座1的結構複雜性。此外，該軸管12的一端呈開放狀，另一端則較佳呈封閉狀，以防注入該軸管12中的潤滑流體從該軸管12的底部滲漏。 The base 1 has a base plate 11 and an axis tube 12. The axis tube 12 can be combined with the base plate 11, or preferably, the axis tube 12 and the base plate 11 are integrally formed and connected, thereby simplifying the structural complexity of the base 1 . In addition, one end of the shaft tube 12 is open, and the other end is preferably closed to prevent leakage of the lubricating fluid injected into the shaft tube 12 from the bottom of the shaft tube 12.

又，該基座1還可在該基板11的周緣設有數個凸耳13，各該凸耳13設有一定位孔131，各該凸耳13結合有一彈性墊4(例如橡膠墊)，該彈性墊4包覆該凸耳13的上、下表面，但維持該定位孔131不被完全遮蔽。如此，可利用鎖固件(例如螺絲，圖未繪示)穿過各該定位孔131，將該基座1組裝定位在如冷凍櫃或冰箱等系統殼體(圖未繪示)中的預定位置，並由該彈性墊4貼接該系統殼體以吸收震動，使本發明離心扇運作時所產生的震動不易傳導至系統殼體，系統運作時所產生的震動亦不易傳導至該基座1，故能有效改善震動噪音問題。 In addition, the base 1 may be provided with a plurality of lugs 13 on the periphery of the base plate 11, each lug 13 is provided with a positioning hole 131, and each lug 13 is combined with an elastic pad 4 (such as a rubber pad). The pad 4 covers the upper and lower surfaces of the lug 13, but maintains that the positioning hole 131 is not completely covered. In this way, a locking member (such as a screw, not shown) can be passed through each positioning hole 131 to assemble and position the base 1 at a predetermined position in a system casing (not shown) such as a freezer or refrigerator , And the elastic pad 4 is attached to the system casing to absorb vibration, so that the vibration generated by the centrifugal fan of the present invention is not easily transmitted to the system casing, and the vibration generated during the system operation is not easily transmitted to the base 1 , So it can effectively improve the vibration noise problem.

該定子組2設於該軸管12的外周，該定子組2可以為各種能夠驅動該扇輪3旋轉的結構設計；例如但不限制地，本實施例可選擇將該定子組2套設結合於該軸管12的外周壁，且該定子組2包含一鐵芯21及捲繞結合於該鐵芯21的一線圈組22。 The stator group 2 is disposed on the outer periphery of the shaft tube 12, and the stator group 2 can be of various structural designs that can drive the fan wheel 3 to rotate; for example, but not limited to, in this embodiment, the stator group 2 can be combined and nested On the outer peripheral wall of the shaft tube 12, the stator assembly 2 includes an iron core 21 and a coil assembly 22 wound around the iron core 21.

請參照第4、5圖，該扇輪3具有一轉軸31、一輪轂32、數 個扇葉33及一磁性件34，該轉軸31可旋轉地設於該軸管12，該輪轂32連接該轉軸31，該數個扇葉33環設於該輪轂32的外周，該磁性件34則設於該輪轂32的內表面並與該定子組2的鐵芯21相對；藉此，該定子組2通電產生磁場後，可驅動該扇輪3旋轉作動。其中，該基座1的基板11具有相對的一上表面11a及一下表面11b，該基板11軸向對應於該扇輪3的範圍內較佳呈封閉狀，使該上表面11a與該下表面11b不連通，以減少不必要的氣流流失及擾流現象，確保氣流可被順暢地導向側端，並具有降低運作噪音的功能。 Please refer to Figures 4 and 5, the fan wheel 3 has a rotating shaft 31, a hub 32, a number of A fan blade 33 and a magnetic member 34, the rotating shaft 31 is rotatably disposed on the shaft tube 12, the hub 32 is connected to the rotating shaft 31, the plurality of fan blades 33 are disposed around the outer periphery of the hub 32, the magnetic member 34 It is arranged on the inner surface of the hub 32 and is opposed to the iron core 21 of the stator group 2; thereby, the stator group 2 can drive the fan wheel 3 to rotate after being energized to generate a magnetic field. The substrate 11 of the base 1 has an upper surface 11a and a lower surface 11b opposite to each other. The substrate 11 preferably has a closed shape in a range corresponding to the axial direction of the fan wheel 3, so that the upper surface 11a and the lower surface 11b is not connected to reduce unnecessary air loss and turbulence, ensure that the air flow can be smoothly guided to the side, and have the function of reducing operating noise.

更詳言之，各該扇葉33具有一最高頂緣331，且各該扇葉33的最高頂緣331高出該輪轂32的頂緣，使得氣流進入該扇輪3的旋轉範圍後，在衝向該輪轂32的頂緣之前，即可被該數個扇葉33所擾動而流向側端，藉以提升導引氣流流動的順暢度，並兼可降低運作噪音。具體而言，在該轉軸31的軸向上，該輪轂32的頂緣與各該扇葉33的最高頂緣331相距一軸向間距h，而各該扇葉33具有一最大軸向高度H，該軸向間距h較佳不大於該最大軸向高度H的二分之一，以達到更佳的導引氣流及降低運作噪音等效果。 More specifically, each fan blade 33 has a highest top edge 331, and the highest top edge 331 of each fan blade 33 is higher than the top edge of the hub 32, so that the airflow enters the rotation range of the fan wheel 3, Before rushing to the top edge of the hub 32, it can be disturbed by the plurality of blades 33 and flow to the side end, thereby improving the smoothness of the guided air flow and reducing the operating noise. Specifically, in the axial direction of the rotating shaft 31, the top edge of the hub 32 is separated from the highest top edge 331 of each blade 33 by an axial distance h, and each blade 33 has a maximum axial height H, The axial distance h is preferably not greater than one-half of the maximum axial height H, so as to achieve better effects of guiding air flow and reducing operating noise.

此外，該數個扇葉33的外緣332形成一最大外徑D1，該輪轂32的外徑D2與該最大外徑D1的比值(D2/D1)較佳大於0.4且小於或等於0.5，可達到最為明顯的降低運作噪音效果。其中，該輪轂32具有一軸向延伸部321，前述該輪轂32的外徑D2即為該軸向延伸部321的外徑。 In addition, the outer edges 332 of the blades 33 form a maximum outer diameter D1. The ratio of the outer diameter D2 of the hub 32 to the maximum outer diameter D1 (D2/D1) is preferably greater than 0.4 and less than or equal to 0.5. To achieve the most obvious effect of reducing operating noise. The hub 32 has an axial extension 321, and the outer diameter D2 of the hub 32 is the outer diameter of the axial extension 321.

本實施例的扇輪3另具有一延伸盤35及一連接環36，該延伸盤35連接該輪轂32並沿該轉軸31的徑向朝外延伸，該數個扇葉33的底緣333連接於該延伸盤35；該連接環36則連接該數個扇葉33並與該延伸盤35相間隔，用以穩固該數個扇葉33。其中，在該轉軸31的徑向上，該數個扇葉33的最大外徑D1較佳小於或等於該連接環36的外徑d1，使 各該扇葉33的外緣332不凸出該連接環36，藉以避免該連接環36之設置影響到各該扇葉33的導風效果。是以，各該扇葉33的外緣332可以如圖所示呈平直狀，或是由上而下朝該輪轂32方向傾斜等，本發明均不加以限制。特別是，當選擇使該數個扇葉33及該連接環36一體成型相連接以提升製造便利性時，較佳使該連接環36的內徑d2大於或等於該數個扇葉33底緣333的外徑D3，以確保射出成型後的成品可順利離模。 The fan wheel 3 of this embodiment further has an extension disk 35 and a connecting ring 36. The extension disk 35 is connected to the hub 32 and extends outward in the radial direction of the rotating shaft 31. The bottom edges 333 of the blades 33 are connected The extension disk 35; the connecting ring 36 connects the plurality of blades 33 and is spaced apart from the extension disk 35 to stabilize the plurality of blades 33. Wherein, in the radial direction of the rotating shaft 31, the maximum outer diameter D1 of the blades 33 is preferably less than or equal to the outer diameter d1 of the connecting ring 36, so that The outer edge 332 of each fan blade 33 does not protrude from the connecting ring 36, so as to prevent the arrangement of the connecting ring 36 from affecting the wind guiding effect of each fan blade 33. Therefore, the outer edge 332 of each fan blade 33 may be straight as shown in the figure, or inclined toward the hub 32 from top to bottom, etc. The present invention is not limited. In particular, when selecting to integrally connect the plurality of blades 33 and the connecting ring 36 to improve manufacturing convenience, it is preferable to make the inner diameter d2 of the connecting ring 36 greater than or equal to the bottom edges of the plurality of blades 33 The outer diameter D3 of 333 ensures that the finished product after injection molding can be smoothly released from the mold.

此外，該連接環36的內周面361較佳連接於該數個扇葉33的外緣332，藉以確保該連接環36之設置不會影響進風，且該連接環36連接各該扇葉33處較佳設成導弧型態，藉以加強連接處的強度，且可避免該處易裂損。該連接環36還可設有至少一配重槽362，該配重槽362可用以容置平衡配重件，藉以調整該扇輪3之配重，從而提升該扇輪3的旋轉順暢度及平穩度。 In addition, the inner circumferential surface 361 of the connecting ring 36 is preferably connected to the outer edges 332 of the plurality of blades 33, so as to ensure that the arrangement of the connecting ring 36 does not affect the air intake, and the connecting ring 36 connects each of the blades 33 places are preferably set to arc-guiding type, in order to strengthen the strength of the joint, and can avoid the place easy to crack. The connecting ring 36 can also be provided with at least one weight groove 362, which can be used to accommodate a balance weight, thereby adjusting the weight of the fan wheel 3, thereby improving the smoothness of rotation of the fan wheel 3 and Smoothness.

綜上所述，本發明的離心扇及其扇輪，可藉由使各扇葉的最高頂緣高出輪轂的頂緣，以及使扇輪中除了轉軸以外的其他構件維持特定型態及尺寸比例，從而提升該離心扇運作時導引氣流流動的順暢度，有效達到降低運作噪音等功效。 In summary, the centrifugal fan and the fan wheel of the present invention can maintain the specific shape and size of the other components of the fan wheel except the rotating shaft by making the highest top edge of each blade higher than the top edge of the hub Proportion, so as to improve the smoothness of the air flow during the operation of the centrifugal fan, and effectively reduce the operating noise.

雖然本發明已利用上述較佳實施例揭示，然其並非用以限定本發明，任何熟習此技藝者在不脫離本發明之精神和範圍之內，相對上述實施例進行各種更動與修改仍屬本發明所保護之技術範疇，因此本發明之保護範圍當視後附之申請專利範圍所界定者為準。 Although the present invention has been disclosed using the above-mentioned preferred embodiments, it is not intended to limit the present invention. Anyone who is familiar with this art without departing from the spirit and scope of the present invention still makes various changes and modifications to the above-mentioned embodiments. The technical scope of the invention is protected, so the scope of protection of the present invention shall be subject to the scope defined in the appended patent application.

1‧‧‧基座 1‧‧‧Dock

11‧‧‧基板 11‧‧‧ substrate

11a‧‧‧上表面 11a‧‧‧Upper surface

11b‧‧‧下表面 11b‧‧‧Lower surface

12‧‧‧軸管 12‧‧‧Shaft tube

2‧‧‧定子組 2‧‧‧Stator

21‧‧‧鐵芯 21‧‧‧Iron core

22‧‧‧線圈組 22‧‧‧coil set

3‧‧‧扇輪 3‧‧‧fan wheel

31‧‧‧轉軸 31‧‧‧spindle

32‧‧‧輪轂 32‧‧‧Wheel

321‧‧‧軸向延伸部 321‧‧‧Axial extension

33‧‧‧扇葉 33‧‧‧ fan blade

331‧‧‧最高頂緣 331‧‧‧Highest top edge

332‧‧‧外緣 332‧‧‧Outer edge

333‧‧‧底緣 333‧‧‧Bottom edge

34‧‧‧磁性件 34‧‧‧Magnetic parts

35‧‧‧延伸盤 35‧‧‧Extended plate

36‧‧‧連接環 36‧‧‧Connecting ring

361‧‧‧內周面 361‧‧‧Inner peripheral surface

362‧‧‧配重槽 362‧‧‧ Counterweight slot

D1‧‧‧最大外徑 D1‧‧‧Maximum outer diameter

d1‧‧‧外徑 d1‧‧‧Outer diameter

D2‧‧‧外徑 D2‧‧‧Outer diameter

d2‧‧‧內徑 d2‧‧‧Inner diameter

D3‧‧‧外徑 D3‧‧‧Outer diameter

H‧‧‧最大軸向高度 H‧‧‧Maximum axial height

h‧‧‧軸向間距 h‧‧‧Axial spacing

Claims (16)

一種離心扇，包含：一基座，該基座具有一軸管；一定子組，該定子組設於該軸管的外周；及一扇輪，該扇輪具有一轉軸及一連接環，該轉軸連接一輪轂，該轉軸可旋轉地設於該軸管，數個扇葉環設於該輪轂的外周，該連接環連接該數個扇葉，該連接環具有數個肋條以形成有數個配重槽；其中，各該扇葉具有一最高頂緣，各該最高頂緣高出該輪轂的頂緣；該數個扇葉的外緣形成一最大外徑，該輪轂的外徑與該最大外徑的比值大於0.4且小於或等於0.5。 A centrifugal fan includes: a base with a shaft tube; a certain subgroup, the stator group is disposed on the outer periphery of the shaft tube; and a fan wheel with a rotating shaft and a connecting ring, the rotating shaft A hub is connected, the rotating shaft is rotatably provided on the shaft tube, a plurality of fan blade rings are provided on the outer periphery of the hub, the connecting ring is connected with the several fan blades, the connecting ring has a plurality of ribs to form a plurality of counterweights Groove; wherein, each of the blades has a highest top edge, each of the highest top edges is higher than the top edge of the hub; the outer edges of the several blades form a maximum outer diameter, the outer diameter of the hub and the maximum outer diameter The diameter ratio is greater than 0.4 and less than or equal to 0.5. 如申請專利範圍第1項所述之離心扇，其中，該輪轂具有一軸向延伸部，所述該輪轂的外徑為該軸向延伸部的外徑。 The centrifugal fan according to item 1 of the patent application scope, wherein the hub has an axial extension, and the outer diameter of the hub is the outer diameter of the axial extension. 如申請專利範圍第1項所述之離心扇，其中，在該轉軸的軸向上，該輪轂的頂緣與各該扇葉的最高頂緣相距一軸向間距，各該扇葉具有一最大軸向高度，該軸向間距不大於該最大軸向高度的二分之一。 The centrifugal fan according to item 1 of the patent application scope, wherein, in the axial direction of the rotating shaft, the top edge of the hub is separated from the highest top edge of each blade by an axial distance, and each blade has a maximum axis To the height, the axial distance is not greater than half of the maximum axial height. 如申請專利範圍第1項所述之離心扇，其中，該扇輪具有一延伸盤，該延伸盤連接該輪轂並沿該轉軸的徑向朝外延伸，該數個扇葉的底緣連接該延伸盤，該連接環與該延伸盤相間隔。 The centrifugal fan according to item 1 of the patent application scope, wherein the fan wheel has an extension disk, the extension disk is connected to the hub and extends outward in the radial direction of the rotating shaft, and the bottom edges of the blades are connected to the An extension disk, the connecting ring is spaced from the extension disk. 如申請專利範圍第4項所述之離心扇，其中，在該轉軸的徑向上，該數個扇葉的最大外徑小於或等於該連接環的外徑。 The centrifugal fan according to item 4 of the patent application scope, wherein, in the radial direction of the rotating shaft, the maximum outer diameter of the blades is less than or equal to the outer diameter of the connecting ring. 如申請專利範圍第5項所述之離心扇，其中，該數個扇葉及該連接環一體成型相連接，該連接環的內徑大於或等於該數個扇葉底緣的外徑。 The centrifugal fan according to item 5 of the patent application scope, wherein the blades and the connecting ring are integrally connected to each other, and the inner diameter of the connecting ring is greater than or equal to the outer diameter of the bottom edges of the blades. 如申請專利範圍第5項所述之離心扇，其中，該連接環的內周面連接於該數個扇葉的外緣。 The centrifugal fan as described in item 5 of the patent application scope, wherein the inner circumferential surface of the connecting ring is connected to the outer edges of the several blades. 如申請專利範圍第1項所述之離心扇，其中，該基座具有一基板，該軸 管設於該基板，該基板具有相對的一上表面及一下表面，該基板軸向對應於該扇輪的範圍內呈封閉狀，使該上表面與該下表面不連通。 The centrifugal fan as described in item 1 of the patent application, wherein the base has a base plate, the shaft The tube is arranged on the base plate, and the base plate has an upper surface and a lower surface opposite to each other. The base plate is closed in a range corresponding to the axial direction of the fan wheel, so that the upper surface and the lower surface are not connected. 如申請專利範圍第1項所述之離心扇，其中，該基座具有一基板，該軸管設於該基板，該基座在該基板的周緣設有數個凸耳，各該凸耳設有一定位孔，各該凸耳結合有一彈性墊，該彈性墊包覆該凸耳的上、下表面且不完全遮蔽該定位孔。 The centrifugal fan according to item 1 of the patent application scope, wherein the base has a base plate, the shaft tube is provided on the base plate, the base is provided with a plurality of lugs on the periphery of the base plate, and each lug is provided with a For the positioning hole, each lug is combined with an elastic pad, and the elastic pad covers the upper and lower surfaces of the lug and does not completely cover the positioning hole. 一種離心扇的扇輪，包含：一轉軸；一輪轂，該輪轂連接該轉軸；數個扇葉，該數個扇葉環設於該輪轂的外周；及一連接環，該連接環連接該數個扇葉，該連接環具有數個肋條以形成有數個配重槽；其中，各該扇葉具有一最高頂緣，各該最高頂緣高出該輪轂的頂緣；該數個扇葉的外緣形成一最大外徑，該輪轂的外徑與該最大外徑的比值大於0.4且小於或等於0.5。 A fan wheel of a centrifugal fan includes: a rotating shaft; a hub connected to the rotating shaft; a plurality of fan blades, the plurality of fan blade rings are provided on the outer periphery of the hub; and a connecting ring, the connecting ring is connected to the number Blades, the connecting ring has several ribs to form several weight grooves; wherein each blade has a highest top edge, each of the highest top edges is higher than the top edge of the hub; the number of blades The outer edge forms a maximum outer diameter, and the ratio of the outer diameter of the hub to the maximum outer diameter is greater than 0.4 and less than or equal to 0.5. 如申請專利範圍第10項所述之離心扇的扇輪，其中，該輪轂具有一軸向延伸部，所述該輪轂的外徑為該軸向延伸部的外徑。 The fan wheel of a centrifugal fan as described in item 10 of the patent application range, wherein the hub has an axial extension, and the outer diameter of the hub is the outer diameter of the axial extension. 如申請專利範圍第10項所述之離心扇的扇輪，其中，在該轉軸的軸向上，該輪轂的頂緣與各該扇葉的最高頂緣相距一軸向間距，各該扇葉具有一最大軸向高度，該軸向間距不大於該最大軸向高度的二分之一。 The fan wheel of a centrifugal fan as described in item 10 of the patent application scope, wherein, in the axial direction of the rotating shaft, the top edge of the hub is spaced an axial distance from the highest top edge of each fan blade, and each fan blade has A maximum axial height, the axial distance is not greater than half of the maximum axial height. 如申請專利範圍第10項所述之離心扇的扇輪，其中，該扇輪具有一延伸盤，該延伸盤連接該輪轂並沿該轉軸的徑向朝外延伸，該數個扇葉的底緣連接該延伸盤，該連接環與該延伸盤相間隔。 The fan wheel of a centrifugal fan as described in item 10 of the patent application range, wherein the fan wheel has an extension disc connected to the hub and extending outward in the radial direction of the rotating shaft, the bottom of the plurality of blades The rim is connected to the extension disk, and the connection ring is spaced from the extension disk. 如申請專利範圍第13項所述之離心扇的扇輪，其中，在該轉軸的徑向上，該數個扇葉的最大外徑小於或等於該連接環的外徑。 The fan wheel of the centrifugal fan as described in item 13 of the patent application range, wherein, in the radial direction of the rotating shaft, the maximum outer diameter of the blades is less than or equal to the outer diameter of the connecting ring. 如申請專利範圍第14項所述之離心扇的扇輪，其中，該數個扇葉及該連接環一體成型相連接，該連接環的內徑大於或等於該數個扇葉底緣的外徑。 The fan wheel of the centrifugal fan as described in item 14 of the patent application scope, wherein the blades and the connecting ring are integrally formed and connected, and the inner diameter of the connecting ring is greater than or equal to the outer edge of the bottom edges of the blades path. 如申請專利範圍第14項所述之離心扇的扇輪，其中，該連接環的內周面連接於該數個扇葉的外緣。 The fan wheel of the centrifugal fan as described in item 14 of the patent application scope, wherein the inner circumferential surface of the connecting ring is connected to the outer edges of the several blades.
TW107103656A 2018-02-01 2018-02-01 Centrifugal fan and impeller thereof TWI681127B (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
TW107103656A TWI681127B (en) 2018-02-01 2018-02-01 Centrifugal fan and impeller thereof
CN201810160050.4A CN110107514A (en) 2018-02-01 2018-02-26 Centrifugal fan and fan wheel thereof

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
TW107103656A TWI681127B (en) 2018-02-01 2018-02-01 Centrifugal fan and impeller thereof

Publications (2)

Publication Number Publication Date
TW201934879A TW201934879A (en) 2019-09-01
TWI681127B true TWI681127B (en) 2020-01-01

Family

ID=67483329

Family Applications (1)

Application Number Title Priority Date Filing Date
TW107103656A TWI681127B (en) 2018-02-01 2018-02-01 Centrifugal fan and impeller thereof

Country Status (2)

Country Link
CN (1) CN110107514A (en)
TW (1) TWI681127B (en)

Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0408221A2 (en) * 1989-07-14 1991-01-16 International Business Machines Corporation DC motor driven centrifugal fan
CN100348373C (en) * 2004-03-04 2007-11-14 日立工机株式会社 Power tool
TWM371796U (en) * 2009-08-11 2010-01-01 Elitegroup Computer Sys Co Ltd Vibration damping structure for fan
CN202007792U (en) * 2011-04-01 2011-10-12 台达电子工业股份有限公司 Impeller
TWI457505B (en) * 2009-01-08 2014-10-21 Delta Electronics Inc Ventilator and impeller thereof
CN104454635A (en) * 2013-09-18 2015-03-25 佛山市建准电子有限公司 Blowing fan
US20150292331A1 (en) * 2014-04-11 2015-10-15 Ebm-Papst Mulfingen Gmbh & Co. Kg Balancing pockets
US20160138614A1 (en) * 2014-11-18 2016-05-19 Minebea Co., Ltd. Impeller for centrifugal fan and centrifugal fan
US20180023587A1 (en) * 2016-07-19 2018-01-25 Minebea Mitsumi Inc. Centrifugal Fan

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7351031B2 (en) * 2004-11-01 2008-04-01 Sunonwealth Electric Machine Industry Co., Ltd. Centrifugal blower
CN101776089A (en) * 2009-01-08 2010-07-14 台达电子工业股份有限公司 Ventilation device and impeller thereof
CN202659562U (en) * 2012-06-04 2013-01-09 广东美的制冷设备有限公司 Eccentric wind wheel and air processing device with same
CN103850948A (en) * 2013-09-13 2014-06-11 海信（山东）冰箱有限公司 Centrifugal fan and refrigerator using fan
CN106593946B (en) * 2016-11-08 2019-05-03 青岛海尔股份有限公司 Centrifugal blower and wind cooling refrigerator with the centrifugal blower
CN206222805U (en) * 2016-11-14 2017-06-06 青岛海尔股份有限公司 For the beam and refrigerator of assembling in refrigerator

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0408221A2 (en) * 1989-07-14 1991-01-16 International Business Machines Corporation DC motor driven centrifugal fan
CN100348373C (en) * 2004-03-04 2007-11-14 日立工机株式会社 Power tool
TWI457505B (en) * 2009-01-08 2014-10-21 Delta Electronics Inc Ventilator and impeller thereof
TWM371796U (en) * 2009-08-11 2010-01-01 Elitegroup Computer Sys Co Ltd Vibration damping structure for fan
CN202007792U (en) * 2011-04-01 2011-10-12 台达电子工业股份有限公司 Impeller
CN104454635A (en) * 2013-09-18 2015-03-25 佛山市建准电子有限公司 Blowing fan
US20150292331A1 (en) * 2014-04-11 2015-10-15 Ebm-Papst Mulfingen Gmbh & Co. Kg Balancing pockets
US20160138614A1 (en) * 2014-11-18 2016-05-19 Minebea Co., Ltd. Impeller for centrifugal fan and centrifugal fan
US20180023587A1 (en) * 2016-07-19 2018-01-25 Minebea Mitsumi Inc. Centrifugal Fan

Also Published As

Publication number Publication date
CN110107514A (en) 2019-08-09
TW201934879A (en) 2019-09-01

Similar Documents

Publication Publication Date Title
CN102782333B (en) Centrifugal blower assembly
TWI516683B (en) Centrifugal fan
JP2013047483A (en) Centrifugal fan
JP2013024208A (en) Centrifugal fan
JP2013076335A (en) Centrifugal fan
JP2013113128A (en) Axial flow fan
US11955876B2 (en) Fan and electric appliance
JP4877777B2 (en) Blower
US10641280B2 (en) Turbo fan and air conditioner including same
US20030063973A1 (en) Fan wheel structure for a blower fan
JPH05306699A (en) Multiblade blower
TWI681127B (en) Centrifugal fan and impeller thereof
TWI414681B (en) Impeller
TW201500653A (en) Balanceable fan
JP2017218928A (en) Impeller and fan with impeller
JP2015102002A (en) Turbo-fan, and air conditioner using the same
TWI724872B (en) Centrifugal impeller and centrifugal fan including the same
WO2020017182A1 (en) Blower
JP6583558B2 (en) Centrifugal blower
JP2015102003A (en) Turbo-fan, and air conditioner using the former
TWI788136B (en) Impeller and cooling fan including the same
TWI755333B (en) Impeller and fan with the same
TW201934880A (en) Impeller of a centrifugal fan
TWI699486B (en) Impeller
CN216518861U (en) Fan frame with noise reduction structure