US20070154308A1 - Heat-dissipating fan - Google Patents

Heat-dissipating fan Download PDF

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Publication number
US20070154308A1
US20070154308A1 US11/612,333 US61233306A US2007154308A1 US 20070154308 A1 US20070154308 A1 US 20070154308A1 US 61233306 A US61233306 A US 61233306A US 2007154308 A1 US2007154308 A1 US 2007154308A1
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US
United States
Prior art keywords
airflow
guide ring
heat
guide
dissipating fan
Prior art date
Legal status (The legal status 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 status listed.)
Abandoned
Application number
US11/612,333
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English (en)
Inventor
Sheng-An Yang
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Publication of US20070154308A1 publication Critical patent/US20070154308A1/en
Priority to US12/634,673 priority Critical patent/US20100247344A1/en
Abandoned legal-status Critical Current

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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
    • 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
    • F04D25/0613—Units comprising pumps and their driving means the pump being electrically driven the electric motor being specially adapted for integration in the pump the electric motor being of the inside-out type, i.e. the rotor is arranged radially outside a central stator
    • 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
    • F04D29/32—Rotors specially for elastic fluids for axial flow pumps
    • F04D29/38—Blades
    • F04D29/384—Blades characterised by form
    • 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
    • F04D29/40—Casings; Connections of working fluid
    • F04D29/52—Casings; Connections of working fluid for axial pumps
    • F04D29/54—Fluid-guiding means, e.g. diffusers
    • F04D29/541—Specially adapted for elastic fluid pumps
    • F04D29/545—Ducts
    • F04D29/547—Ducts having a special shape in order to influence fluid flow
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
    • H01L23/00—Details of semiconductor or other solid state devices
    • H01L23/34—Arrangements for cooling, heating, ventilating or temperature compensation ; Temperature sensing arrangements
    • H01L23/46—Arrangements for cooling, heating, ventilating or temperature compensation ; Temperature sensing arrangements involving the transfer of heat by flowing fluids
    • H01L23/467—Arrangements for cooling, heating, ventilating or temperature compensation ; Temperature sensing arrangements involving the transfer of heat by flowing fluids by flowing gases, e.g. air

Definitions

  • the present invention relates to a heat-dissipating fan, and more particularly to a heat-dissipating fan with an airflow outlet and at least one guide ring mounted at the airflow outlet to increase a speed of exhausting airflow, to raise system impedance and to enhance heat-dissipating efficiency.
  • a conventional heat-dissipating fan ( 3 ) in accordance with the prior art has a housing ( 31 ), a drive motor and an impeller ( 32 ).
  • the housing ( 31 ) has a receiving space ( 311 ), a hub bracket ( 33 ) and multiple supporting ribs ( 312 ).
  • the receiving space ( 311 ) is formed in a center of the housing ( 31 ) and forms an airflow inlet and an airflow outlet respectively at a top end and a bottom end of the housing ( 31 ).
  • the hub bracket ( 33 ) is mounted in the receiving space ( 311 ).
  • the supporting ribs ( 312 ) are formed in the airflow outlet and locate between and connect to the hub bracket ( 33 ) and an inner wall of the receiving space ( 311 ).
  • the drive motor has a stator ( 34 ) and a rotor.
  • the stator ( 34 ) is mounted on the hub bracket ( 33 ) and has an axial hole ( 341 ) formed in a center thereof.
  • the impeller ( 32 ) has a hub ( 322 ), a shaft ( 321 ) and multiple blades ( 323 ).
  • the hub ( 322 ) receives the rotor inside.
  • the shaft ( 321 ) is mounted at a center of the hub ( 322 ) and is inserted into the axial hole ( 341 ).
  • the blades ( 323 ) are mounted around an outer wall of the hub ( 322 ) and form multiple airflow channels ( 324 ) each locating between adjacent blades ( 323 ). Therefore, when the impeller ( 32 ) rotates, air is sucked from the airflow inlet into the airflow channels ( 324 ) and is exhausted from the airflow outlet.
  • the aforementioned heat-dissipating fan does not have enough static pressure, such that the heat-dissipating effect of the conventional fan is inefficient and has a lower system impedance.
  • electric products have faster and faster processing speed and generate more and more heat, so that how to improve a heat-dissipating efficiency of the heat-dissipating fan is an important subject.
  • the invention provides a heat-dissipating fan to mitigate or obviate the aforementioned problems.
  • the primary objective of the present invention is to provide a heat-dissipating fan which has at least one guide ring to speed up an airflow exhausted from the fan to improve a heat dissipating efficiency.
  • the heat-dissipating fan has a housing and an impeller.
  • the housing has a receiving space and at least one guide ring.
  • the receiving space is formed in a center of the housing and forms an airflow inlet and an airflow outlet.
  • the at least one guide ring is mounted near the airflow outlet and each of the at least one guide ring has at least one guide surface formed thereon and facing the airflow inlet.
  • the impeller is mounted rotatably in the receiving space and has a hub and multiple blades.
  • the blades are mounted around an outer wall of the hub and form multiple airflow channels.
  • Each of the airflow channels locates between adjacent blades and has a cross-section narrowed from at least one top end, respectively, of the at least one guide ring to the airflow outlet.
  • Each of the blades has at least one receiving notch.
  • the at least one receiving notch is formed in a bottom edge of the blade, corresponds to at least one cross-section, respectively, of the least one guide ring and defines at least one gap between the bottom edge of the blade and the at least one guide surface of the at least one guide ring.
  • the at least one guide ring is mounted under the blades near the airflow outlet, such that each of the airflow channels formed between adjacent blades is gradually narrowed to speed up the airflow in the airflow channels according to Venturi effect. Additionally, with the guiding effect provided by the at least one guide surface of the at least one guide ring, a period for the blades to accelerate the airflow is prolonged such that the airflow can gain more kinetic energy. Furthermore, the at least one guide ring mounted near the airflow outlet blocks part of the airflow outlet, so that the airflow is prevented from flowing back to the airflow channels when the airflow is reflected by an overheated target device. Additionally, the guide surface can be designed to have different curvatures to concentrate and directly guide the airflow to the target device to achieve an enhanced heat-dissipating efficiency.
  • FIG. 1 is an exploded perspective view of a first embodiment of a heat-dissipating fan in accordance with the present invention
  • FIG. 2 is a side view in partial section of the heat-dissipating fan in FIG. 1 ;
  • FIG. 3 is an exploded perspective view of a second embodiment of the heat-dissipating fan in accordance with the present invention.
  • FIG. 4 is a side view in partial section of the heat-dissipating fan in FIG. 3 ;
  • FIG. 5 is a side view in partial section of a third embodiment of the heat-dissipating fan in accordance with the present invention.
  • FIG. 7 is a side view in partial section of the heat-dissipating fan in FIG. 6 ;
  • FIG. 8 is an exploded perspective view of a conventional heat-dissipating fan in accordance with the prior art.
  • FIG. 9 is a side view in partial section of the heat-dissipating fan in FIG. 8 .
  • a first embodiment of a heat-dissipating fan ( 100 ) in accordance with the present invention comprises a housing ( 2 ), a drive device and an impeller ( 1 ).
  • the housing ( 2 ) has a receiving space ( 21 ), a hub bracket ( 23 ), multiple support ribs ( 22 ) and a guide ring ( 26 ).
  • the receiving space ( 21 ) is formed in a center of the housing ( 2 ) and forms an airflow inlet and an airflow outlet.
  • the airflow inlet and the airflow outlet may be formed respectively at a top end and a bottom end of the housing ( 2 ).
  • the hub bracket ( 23 ) is mounted in the receiving space ( 21 ).
  • the support ribs ( 22 ) are formed in one of the ends of the receiving space ( 21 ) and may be formed in the airflow outlet, as shown in FIG. 1 , or in the airflow inlet.
  • the support ribs ( 22 ) locate between and connect to the hub bracket ( 23 ) and an inner wall of the receiving space ( 21 ).
  • the guide ring ( 26 ) is mounted coaxially around an outer wall of the hub bracket ( 23 ) near the airflow outlet and has a guide surface ( 27 ) formed thereon and facing the airflow inlet.
  • the guide surface ( 27 ) may be bevel or streamline and may be formed on an outside of the guide ring ( 26 ), wherein the outside is away from the hub bracket ( 23 ), as shown in FIG. 2 .
  • the drive device may be a motor and have a stator ( 24 ) and a rotor.
  • the stator ( 24 ) is mounted on the hub bracket ( 23 ) and has an axial hole ( 25 ) formed in a center thereof.
  • the impeller ( 1 ) is mounted in the receiving space ( 21 ) of the housing ( 2 ) and has a hub ( 11 ), a shaft ( 12 ) and multiple blades ( 13 ).
  • the hub ( 11 ) receives the rotor inside.
  • the shaft ( 12 ) is mounted at a center of the hub ( 11 ), protrudes downward and is inserted into to the axial hole ( 25 ) in the stator ( 24 ) to mount the impeller ( 1 ) in the receiving space ( 21 ). Accordingly, the rotor in the hub ( 11 ) in cooperation with the stator ( 24 ) in hub bracket ( 23 ) drives the impeller ( 1 ) to rotate.
  • the blades ( 13 ) are mounted around an outer wall of the hub ( 11 ) and form multiple airflow channels ( 14 ) each locating between adjacent blades ( 13 ) and having a cross-section smoothly narrowing from a top end of the guide ring ( 26 ) to the airflow outlet.
  • Each of the blades ( 13 ) has a receiving notch ( 131 ).
  • the receiving notch ( 131 ) is formed in a bottom edge of the blade ( 13 ), corresponds to a cross-section of the guide ring ( 26 ) and defines a gap between the bottom edge of the blade ( 13 ) and the guide surface ( 27 ) of the guide ring ( 26 ).
  • the guide ring ( 26 ) mounted under the blades ( 13 ) near the airflow outlet makes the airflow channels ( 14 ) gradually narrowed, when air is sucked from the airflow inlet into the airflow channels ( 14 ) by the rotating blades ( 13 ) of the impeller ( 1 ), airflow is accelerated to pass through the airflow channel ( 14 ) according to Venturi effect.
  • the guide surface ( 27 ) provides a smooth guiding effect to the airflow and prolongs a period for the blades ( 13 ) to accelerate the airflow, such that the airflow gains more kinetic energy.
  • a curvature of the guide surface can be designed based on a position on which an overheated target device is mounted, so that the airflow can be effectively guided to the target device to improve an efficiency of heat exchange.
  • the housing ( 2 A) has a single guide ring ( 28 ).
  • the guide ring ( 28 ) is mounted on the supporting ribs ( 22 ) near the airflow outlet and has two guide surfaces ( 281 ) formed thereon and facing the airflow inlet.
  • the guide surfaces ( 281 ) may be respectively formed on an outside and an inside of the guide ring ( 28 ).
  • the receiving notch ( 131 A) of each blade ( 13 A) of the impeller ( 1 A) corresponds to a cross-section of the guide ring ( 28 ) with two guide surfaces ( 281 ).
  • the housing ( 2 B) has a single guide ring ( 29 ).
  • the guide ring ( 29 ) is mounted near the airflow outlet and has a guide surface ( 291 ) formed thereon and facing the airflow inlet.
  • the guide surface ( 291 ) is formed on an inside of the guide ring ( 29 ), wherein the inside faces the hub bracket ( 23 ).
  • the receiving notches ( 131 B) of the blades ( 13 B) of the impeller ( 1 B) correspond to a cross-section of the guide ring ( 29 ).
  • the housing ( 2 C) has multiple guide rings ( 41 , 42 ).
  • the guide rings ( 41 , 42 ) are mounted on the supporting ribs ( 22 ) at intervals near the airflow outlet.
  • the housing ( 2 C) has two guide rings ( 41 , 42 ).
  • Each of the blades ( 13 C) of the impeller (IC) has multiple receiving notches ( 131 C) corresponding to cross-sections, respectively, of the guide rings ( 29 ).
  • the housing ( 2 , 2 A, 2 B, 2 C) may have multiple guide rings ( 26 , 28 , 29 , 41 , 42 ) including at least one guide ring ( 26 , 29 , 41 , 42 ) with a single guide surface ( 27 , 291 ) and at least one guide ring ( 28 ) with two guide surfaces ( 281 ) which are arranged at intervals.
  • the heat-dissipating fan can provide advantages as follow:
  • each airflow channels ( 14 ) are smoothly narrowed from the top end of the guide ring ( 26 , 28 , 29 , 41 , 42 ) to the airflow outlet, so that the air is squeezed in the airflow channels ( 14 ) to speed up the airflow.
  • the guide ring ( 26 , 28 , 29 , 41 , 42 ) is mounted near the airflow outlet to block part of the airflow outlet, so that the air exhausted out of the airflow outlet is prevented from being reflected back to the airflow channels ( 14 ) by the target device. Accordingly, air turbulence is avoided and the heat-dissipating efficiency is improved.
  • the airflow can be concentrated and directly guided to the target device.
  • the curvature of the guide ring ( 26 , 28 , 29 , 41 , 42 ) can be designed based on different target devices to exactly guide the airflow and to enhance the heat-dissipating efficiency.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Condensed Matter Physics & Semiconductors (AREA)
  • General Physics & Mathematics (AREA)
  • Computer Hardware Design (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Power Engineering (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)
US11/612,333 2005-12-30 2006-12-18 Heat-dissipating fan Abandoned US20070154308A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
US12/634,673 US20100247344A1 (en) 2006-12-18 2009-12-09 Heat dissipating fan

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
TW094223114 2005-12-30
TW094223114U TWM292888U (en) 2005-12-30 2005-12-30 Heat-dissipating fan

Related Child Applications (1)

Application Number Title Priority Date Filing Date
US12/634,673 Continuation-In-Part US20100247344A1 (en) 2006-12-18 2009-12-09 Heat dissipating fan

Publications (1)

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US20070154308A1 true US20070154308A1 (en) 2007-07-05

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ID=37704135

Family Applications (1)

Application Number Title Priority Date Filing Date
US11/612,333 Abandoned US20070154308A1 (en) 2005-12-30 2006-12-18 Heat-dissipating fan

Country Status (5)

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US (1) US20070154308A1 (de)
JP (1) JP2007182880A (de)
DE (1) DE102006061868A1 (de)
GB (1) GB2433772A (de)
TW (1) TWM292888U (de)

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20070065281A1 (en) * 2005-09-22 2007-03-22 Delta Electronics, Inc. Fan and fan frame thereof
US20100003131A1 (en) * 2008-07-04 2010-01-07 Fu Zhun Precision Industry (Shen Zhen) Co., Ltd. Axial fan
US20110127019A1 (en) * 2009-11-27 2011-06-02 Sanyo Electric Co., Ltd. Bell-mouth structure of air blower
CN101498317B (zh) * 2008-02-01 2012-03-14 富准精密工业(深圳)有限公司 散热风扇及其叶轮
CN102852856A (zh) * 2011-06-29 2013-01-02 依必安-派特穆尔芬根股份有限两合公司 具有导流体的轴流式通风机
US20130142644A1 (en) * 2011-12-06 2013-06-06 Hon Hai Precision Industry Co., Ltd. Fan assembly
US20150139793A1 (en) * 2013-11-15 2015-05-21 Ricoh Company, Ltd. Cooling fan mounting device and image forming apparatus including same
US10285306B1 (en) * 2017-11-29 2019-05-07 Listan Gmbh & Co. Kg Power supply
US20190211843A1 (en) * 2016-05-03 2019-07-11 Carrier Corporation Vane axial fan with intermediate flow control rings
US10362711B2 (en) 2017-11-29 2019-07-23 Listan Gmbh & Co. Kg Fan mounting arrangement in a power supply
US10921062B2 (en) * 2019-05-28 2021-02-16 Inventec (Pudong) Technology Corporation Cooling fan and heat dissipating module including the same

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
TWI369937B (en) 2007-08-31 2012-08-01 Delta Electronics Inc Serial fan and frame structure thereof
TWI400033B (zh) * 2008-07-25 2013-06-21 Foxconn Tech Co Ltd 散熱風扇
CN105658038B (zh) * 2016-03-18 2020-12-18 联想(北京)有限公司 散热装置及电子设备
CN114194403B (zh) * 2022-01-25 2023-06-02 广东汇天航空航天科技有限公司 驱动装置的散热结构及飞行器

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3531221A (en) * 1967-08-23 1970-09-29 Papst Motoren Kg Ventilator with axial propeller wheel
US4712977A (en) * 1984-07-02 1987-12-15 Gerfast Sten R Axial fan
US6844641B1 (en) * 2004-03-15 2005-01-18 Sunonwealth Electric Machine Industry Co., Ltd. Casing for heat-dissipating fan
US20050042089A1 (en) * 2003-08-19 2005-02-24 Sunonwealth Electric Machine Industry Co., Ltd. Airflow guiding structure for a heat-dissipating fan

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH05164090A (ja) * 1991-12-17 1993-06-29 Matsushita Refrig Co Ltd 送風機

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3531221A (en) * 1967-08-23 1970-09-29 Papst Motoren Kg Ventilator with axial propeller wheel
US4712977A (en) * 1984-07-02 1987-12-15 Gerfast Sten R Axial fan
US20050042089A1 (en) * 2003-08-19 2005-02-24 Sunonwealth Electric Machine Industry Co., Ltd. Airflow guiding structure for a heat-dissipating fan
US6910862B2 (en) * 2003-08-19 2005-06-28 Sunonwealth Electric Machine Industry Co., Ltd. Airflow guiding structure for a heat-dissipating fan
US6844641B1 (en) * 2004-03-15 2005-01-18 Sunonwealth Electric Machine Industry Co., Ltd. Casing for heat-dissipating fan

Cited By (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7416387B2 (en) * 2005-09-22 2008-08-26 Delta Electronics, Inc. Fan and fan frame thereof
US20070065281A1 (en) * 2005-09-22 2007-03-22 Delta Electronics, Inc. Fan and fan frame thereof
CN101498317B (zh) * 2008-02-01 2012-03-14 富准精密工业(深圳)有限公司 散热风扇及其叶轮
US20100003131A1 (en) * 2008-07-04 2010-01-07 Fu Zhun Precision Industry (Shen Zhen) Co., Ltd. Axial fan
US8092170B2 (en) * 2008-07-04 2012-01-10 Fu Zhun Precision Industry (Shen Zhen) Co., Ltd. Axial fan
US20110127019A1 (en) * 2009-11-27 2011-06-02 Sanyo Electric Co., Ltd. Bell-mouth structure of air blower
US9097261B2 (en) 2011-06-29 2015-08-04 Ebm-Papst Mulfingen Gmbh & Co. Kg Axial fan with flow guide body
CN102852856A (zh) * 2011-06-29 2013-01-02 依必安-派特穆尔芬根股份有限两合公司 具有导流体的轴流式通风机
EP2541068A1 (de) * 2011-06-29 2013-01-02 ebm-papst Mulfingen GmbH & Co. KG Axialventilator mit Strömungsleitkörper
US20130142644A1 (en) * 2011-12-06 2013-06-06 Hon Hai Precision Industry Co., Ltd. Fan assembly
US8747065B2 (en) * 2011-12-06 2014-06-10 Hong Fu Jin Precision Industry (Wuhan) Co., Ltd. Fan assembly
US20150139793A1 (en) * 2013-11-15 2015-05-21 Ricoh Company, Ltd. Cooling fan mounting device and image forming apparatus including same
US20190211843A1 (en) * 2016-05-03 2019-07-11 Carrier Corporation Vane axial fan with intermediate flow control rings
US11168899B2 (en) * 2016-05-03 2021-11-09 Carrier Corporation Vane axial fan with intermediate flow control rings
US11226114B2 (en) 2016-05-03 2022-01-18 Carrier Corporation Inlet for axial fan
US10285306B1 (en) * 2017-11-29 2019-05-07 Listan Gmbh & Co. Kg Power supply
US10362711B2 (en) 2017-11-29 2019-07-23 Listan Gmbh & Co. Kg Fan mounting arrangement in a power supply
US10921062B2 (en) * 2019-05-28 2021-02-16 Inventec (Pudong) Technology Corporation Cooling fan and heat dissipating module including the same

Also Published As

Publication number Publication date
DE102006061868A1 (de) 2007-07-12
JP2007182880A (ja) 2007-07-19
GB2433772A (en) 2007-07-04
TWM292888U (en) 2006-06-21
GB0625991D0 (en) 2007-02-07
GB2433772A8 (en) 2010-07-07

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