US20140147282A1 - Fan structure - Google Patents

Fan structure Download PDF

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Publication number
US20140147282A1
US20140147282A1 US13/684,252 US201213684252A US2014147282A1 US 20140147282 A1 US20140147282 A1 US 20140147282A1 US 201213684252 A US201213684252 A US 201213684252A US 2014147282 A1 US2014147282 A1 US 2014147282A1
Authority
US
United States
Prior art keywords
blades
fan structure
hub
steps
arc surface
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
US13/684,252
Inventor
Kai-Hsiang Hu
Shi-Man Xu
Jia-Sheng Lai
Hai-Jun He
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.)
Cooler Master Development Corp
Original Assignee
Cooler Master Co Ltd
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 Cooler Master Co Ltd filed Critical Cooler Master Co Ltd
Priority to US13/684,252 priority Critical patent/US20140147282A1/en
Assigned to COOLER MASTER CO., LTD. reassignment COOLER MASTER CO., LTD. ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: HE, Hai-jun, HU, KAI-HSIANG, LAI, JIA-SHENG, XU, Shi-man
Assigned to COOLER MASTER DEVELOPMENT CORPORATION reassignment COOLER MASTER DEVELOPMENT CORPORATION CHANGE OF NAME (SEE DOCUMENT FOR DETAILS). Assignors: COOLER MASTER CO., LTD.
Publication of US20140147282A1 publication Critical patent/US20140147282A1/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
    • 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
    • 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
    • F04D29/325—Rotors specially for elastic fluids for axial flow pumps for axial flow fans
    • F04D29/327—Rotors specially for elastic fluids for axial flow pumps for axial flow fans with non identical blades
    • 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

Definitions

  • the present invention relates to a fan structure, in particular, a fan structure for a heat dissipating fan.
  • a conventional fan structure generally comprises a center portion and a plurality of blades extending from the periphery of the center portion.
  • the fan structure is further assembled with electronic parts and a frame so as to form a heat dissipating fan for dissipating all kinds of electronic devices.
  • the conventional fan structure can merely generate a vortex flow field during a rotating operation.
  • the air pressure and the air flow of the vortex flow field cannot be effectively improved due to the shape of the blade so as to result in poor heat dissipating performance.
  • a problem of the blades also generating noises with high decibels during high speed rotation should be resolved immediately.
  • An objective of the present invention is to provide a fan structure having a step structure formed on the end of a blade, thereby providing a disturbed flow-guiding effect so as to enhance the air pressure and the air flow of the wind flow field.
  • the present invention provides a fan structure comprising a hub and at least one set of blades extending from the hub, each of the blades has a step structure radially formed away from the periphery of the hub.
  • the present invention provides a fan structure comprising a hub and at least one set of blades connected to and extending away from the hub, each of the blades having a plurality of steps with a height difference formed away from the periphery of the hub, the height of the inside one of the steps higher than that of the outside one of the steps.
  • the present invention further has the following effect of noise suppression by forming a fillet on the tip of the outside step.
  • FIG. 1 is a stereoscopic diagram illustrating a fan structure according to a first embodiment of the present invention.
  • FIG. 2 is a stereoscopic diagram with respect to another view angle of FIG. 1 .
  • FIG. 3 illustrates a top-view diagram with respect to FIG. 1 .
  • FIG. 4 illustrates a sectional diagram along a line 4 - 4 of FIG. 3 .
  • FIG. 5 is a schematic diagram illustrating the fan structure according to a second embodiment of the present invention assembled with a frame.
  • FIG. 6 is a schematic diagram illustrating the fan structure according to a third embodiment of the present invention assembled with a frame.
  • FIG. 7 is a schematic diagram illustrating the fan structure according to a fourth embodiment of the present invention assembled with a frame.
  • FIG. 8 is a schematic diagram illustrating the fan structure according to a fifth embodiment of the present invention assembled with a frame.
  • a fan structure 1 substantially comprises a hub 10 and a plurality of blades 20 .
  • the hub 10 is composed of a circular upper plate 11 and an annular shrouding plate 12 downwardly bended and extended from the edge of the upper plate 11 .
  • a shaft 13 is centrally connected to the inside of the upper plate 11 and surrounded by the shrouding plate 12 .
  • Each blade 20 is substantially of a three dimensional arched shape, which has an upper arc surface 21 and a lower arc surface 22 correspondingly formed under the upper arc surface 21 . Additionally, the cutting line of the upper arc surface 21 intersects with the axle line of the hub 10 (i.e., an axial-flow type blade).
  • Each blade 20 has a step structure 30 radially formed away from the edge of the hub 10 .
  • the step structure 30 is consisting of an inside step 31 and an outside step 32 .
  • a height drop is formed between either the steps 31 , 32 or the step 31 , 32 and the upper arc surface 21 .
  • the height of the inside step 31 is lower than that of the upper arc surface 21 while being higher than that of the outside step 32 .
  • a fillet 321 for noise suppression is formed above the tip of the outside step 32 .
  • each blade 20 may be formed either by directly extending from the edge of the hub 10 or by being linked to the peripheral surface of the hub 10 via a connecting method and extending away from the hub 10 .
  • each blade 20 sucks air from the back thereof and push the air forward via the upper arc surface 21 . Such air will be blowed out in the form of vortex flow.
  • the air pressure and the air flow may be enhanced by disposing the step structure 30 on the tip of the blade 20 which can alter said vortex flow field and provide a disturbed flow-guiding effect.
  • the fan structure 1 a differs from the fan structure 1 according to the first embodiment in that the fan structure 1 a is substantially combined with a frame 5 .
  • the blades comprises three blades 20 with the step structure 30 and six blades 20 a without the step structure 30 .
  • the three blades 20 commonly form one set and are uniformly disposed between the blades 20 a.
  • the blades comprises six blades 20 with the step structure 30 and three blades 20 b without the step structure 30 .
  • the six blades 20 commonly form three sets and are uniformly disposed between the blades 20 .
  • the blades comprises three blades 20 with the step structure 30 and three blades 20 c without the step structure 30 .
  • the three blades 20 commonly form one set and each is uniformly disposed between any two adjacent blades 20 c.
  • the blades comprises two blades 20 with the step structure 30 and six blades 20 d without the step structure 30 .
  • the two blades 20 commonly form one set and each is uniformly disposed between any two adjacent blades 20 d.
  • the fan structure according to the present invention indeed achieve the purpose and thus solves the defect of the prior art. Further, it totally complies with requirements for the application of an Utility patent extremely based on the novelty and nonobviousness thereof such that an application is filed pursuant to the Patent Law. Applicant respectfully requests an examination for the application so as to protect the invention of the inventor.

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

Abstract

A fan structure includes a hub and at least one set of blades connected to and extending away from the hub, each of the blades having a plurality of steps with a height difference formed away from the periphery of the hub, the height of the inside one of the steps higher than that of the outside one of the steps, thereby providing a disturbed flow-guiding effect so as to enhance the air pressure and the air flow of the wind flow field.

Description

    BACKGROUND OF THE INVENTION
  • 1. Field of the Invention
  • The present invention relates to a fan structure, in particular, a fan structure for a heat dissipating fan.
  • 2. Description of Related Art
  • A conventional fan structure generally comprises a center portion and a plurality of blades extending from the periphery of the center portion. The fan structure is further assembled with electronic parts and a frame so as to form a heat dissipating fan for dissipating all kinds of electronic devices.
  • However, the conventional fan structure can merely generate a vortex flow field during a rotating operation. The air pressure and the air flow of the vortex flow field cannot be effectively improved due to the shape of the blade so as to result in poor heat dissipating performance. Further, a problem of the blades also generating noises with high decibels during high speed rotation should be resolved immediately.
    • SUMMARY OF THE INVENTION
  • An objective of the present invention is to provide a fan structure having a step structure formed on the end of a blade, thereby providing a disturbed flow-guiding effect so as to enhance the air pressure and the air flow of the wind flow field. In order to achieve the above mentioned objective, the present invention provides a fan structure comprising a hub and at least one set of blades extending from the hub, each of the blades has a step structure radially formed away from the periphery of the hub.
  • In order to achieve the above mentioned objective, the present invention provides a fan structure comprising a hub and at least one set of blades connected to and extending away from the hub, each of the blades having a plurality of steps with a height difference formed away from the periphery of the hub, the height of the inside one of the steps higher than that of the outside one of the steps.
  • The present invention further has the following effect of noise suppression by forming a fillet on the tip of the outside step.
    • BRIEF DESCRIPTION OF DRAWING
  • FIG. 1 is a stereoscopic diagram illustrating a fan structure according to a first embodiment of the present invention.
  • FIG. 2 is a stereoscopic diagram with respect to another view angle of FIG. 1.
  • FIG. 3 illustrates a top-view diagram with respect to FIG. 1.
  • FIG. 4 illustrates a sectional diagram along a line 4-4 of FIG. 3.
  • FIG. 5 is a schematic diagram illustrating the fan structure according to a second embodiment of the present invention assembled with a frame.
  • FIG. 6 is a schematic diagram illustrating the fan structure according to a third embodiment of the present invention assembled with a frame.
  • FIG. 7 is a schematic diagram illustrating the fan structure according to a fourth embodiment of the present invention assembled with a frame.
  • FIG. 8 is a schematic diagram illustrating the fan structure according to a fifth embodiment of the present invention assembled with a frame.
    •  DETAILED DESCRIPTION OF THE INVENTION
  • The detailed description and the technical contents of the present invention are illustrated with the accompanied drawings as follows. The accompanied drawings merely provide reference and description instead of a limit for the present invention.
  • Please referring to FIGS. 1-4, according to the embodiment, a fan structure 1 substantially comprises a hub 10 and a plurality of blades 20. The hub 10 is composed of a circular upper plate 11 and an annular shrouding plate 12 downwardly bended and extended from the edge of the upper plate 11. A shaft 13 is centrally connected to the inside of the upper plate 11 and surrounded by the shrouding plate 12.
  • Nine blades 20 radially extend away from the peripheral surface of the shrouding plate 12. Each blade 20 is substantially of a three dimensional arched shape, which has an upper arc surface 21 and a lower arc surface 22 correspondingly formed under the upper arc surface 21. Additionally, the cutting line of the upper arc surface 21 intersects with the axle line of the hub 10 (i.e., an axial-flow type blade). Each blade 20 has a step structure 30 radially formed away from the edge of the hub 10. The step structure 30 is consisting of an inside step 31 and an outside step 32. In addition, a height drop is formed between either the steps 31, 32 or the step 31, 32 and the upper arc surface 21. The height of the inside step 31 is lower than that of the upper arc surface 21 while being higher than that of the outside step 32. Further, a fillet 321 for noise suppression is formed above the tip of the outside step 32.
  • Furthermore, each blade 20 may be formed either by directly extending from the edge of the hub 10 or by being linked to the peripheral surface of the hub 10 via a connecting method and extending away from the hub 10.
  • In the utilization of the high speed operation of the fan structure 1, each blade 20 sucks air from the back thereof and push the air forward via the upper arc surface 21. Such air will be blowed out in the form of vortex flow. The air pressure and the air flow may be enhanced by disposing the step structure 30 on the tip of the blade 20 which can alter said vortex flow field and provide a disturbed flow-guiding effect.
  • Please referring to FIG. 5, which illustrates the fan structure according to the second embodiment of the present invention, the fan structure 1 a differs from the fan structure 1 according to the first embodiment in that the fan structure 1 a is substantially combined with a frame 5. According to the embodiment, the blades comprises three blades 20 with the step structure 30 and six blades 20 a without the step structure 30. The three blades 20 commonly form one set and are uniformly disposed between the blades 20 a.
  • Please referring to FIG. 6, which illustrates the fan structure according to the third embodiment of the present invention, the blades comprises six blades 20 with the step structure 30 and three blades 20 b without the step structure 30. The six blades 20 commonly form three sets and are uniformly disposed between the blades 20.
  • Please referring to FIG. 7, which illustrates the fan structure according to the fourth embodiment of the present invention, the blades comprises three blades 20 with the step structure 30 and three blades 20 c without the step structure 30. The three blades 20 commonly form one set and each is uniformly disposed between any two adjacent blades 20 c.
  • Please referring to FIG. 8, which illustrates the fan structure according to the fifth embodiment of the present invention, the blades comprises two blades 20 with the step structure 30 and six blades 20 d without the step structure 30. The two blades 20 commonly form one set and each is uniformly disposed between any two adjacent blades 20 d.
  • In conclusion, the fan structure according to the present invention indeed achieve the purpose and thus solves the defect of the prior art. Further, it totally complies with requirements for the application of an Utility patent extremely based on the novelty and nonobviousness thereof such that an application is filed pursuant to the Patent Law. Applicant respectfully requests an examination for the application so as to protect the invention of the inventor.

Claims (14)

What is claimed is:
1. A fan structure, comprising:
a hub; and
at least one set of blades, extending from the hub, each of the blades having a step structure radially formed away from the periphery of the hub.
2. The fan structure of claim 1, wherein the set of blades is consisting of two blades.
3. The fan structure of claim 1, wherein the set of blades is consisting of three blades.
4. The fan structure of claim 1, wherein the hub includes an upper plate and a shrouding plate bended and extending from the periphery of the upper plate, the set of blades extending from the shrouding plate, respectively.
5. The fan structure of claim 4, further comprising a shaft centrally connected to an inside portion of the upper plate and surrounded by the shrouding plate.
6. The fan structure of claim 1, wherein the step structure has a fillet formed on the tip thereof.
7. A fan structure, comprising:
a hub; and
at least one set of blades connected to and extending away from the hub, each of the blades having a plurality of steps, the steps having a height difference and formed away from the periphery of the hub, a height of an inside one of the steps higher than a height of an outside one of the steps.
8. The fan structure of claim 7, wherein the set of blades is consisting of two blades.
9. The fan structure of claim 7, wherein the set of blades is consisting of three blades.
10. The fan structure of claim 7, wherein the hub includes an upper plate and a shrouding plate bended and extending from the periphery of the upper plate, the set of blades extending from the shrouding plate, respectively.
11. The fan structure of claim 10, further comprising a shaft centrally connected to the inside of the upper plate and surrounded by the shrouding plate.
12. The fan structure of claim 7, wherein each of the blades has an upper arc surface and a lower arc surface correspondingly formed under the upper arc surface, a cutting line of the upper arc surface intersecting with an axle line of the hub.
13. The fan structure of claim 12, wherein the inside one of the steps is disposed between the upper arc surface and the outside one of the steps, and the height of the inside step is lower than that of the upper arc surface.
14. The fan structure of claim 7, wherein the outside step has a fillet formed on the tip thereof.
US13/684,252 2012-11-23 2012-11-23 Fan structure Abandoned US20140147282A1 (en)

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Cited By (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
USD289525S (en) * 1984-10-01 1987-04-28 Industrial Tools, Inc. Slicing machine for magnetic tape or the like
US20150118037A1 (en) * 2013-10-28 2015-04-30 Minebea Co., Ltd. Centrifugal fan
WO2016062132A1 (en) * 2014-10-24 2016-04-28 常州格力博有限公司 Axial flow blower fan blade
USD782639S1 (en) * 2015-06-24 2017-03-28 Mitsubishi Electric Corporation Propeller fan
USD797917S1 (en) * 2015-08-17 2017-09-19 Delta T Corporation Fan with light
WO2018107353A1 (en) * 2016-12-13 2018-06-21 华为技术有限公司 Device, apparatus and method for monitoring heat dissipation states of devices
CN108980102A (en) * 2018-09-07 2018-12-11 袁毛毛 A kind of blade structure of stealth fan lamp
USD859630S1 (en) * 2015-11-20 2019-09-10 Kichler Lighting Llc Ceiling fan
US10539157B2 (en) 2015-04-08 2020-01-21 Horton, Inc. Fan blade surface features
USD884874S1 (en) * 2018-01-13 2020-05-19 Guangdong Midea Environmental Appliances Manufacturing Co., Ltd Turbo heater blade
WO2020125128A1 (en) * 2018-12-19 2020-06-25 珠海格力电器股份有限公司 Axial flow fan blade, ventilation device and air conditioner
USD910834S1 (en) * 2018-12-05 2021-02-16 Asia Vital Components Co., Ltd. Impeller for a fan
US11187083B2 (en) 2019-05-07 2021-11-30 Carrier Corporation HVAC fan
USD940759S1 (en) * 2015-12-01 2022-01-11 Transportation Ip Holdings, Llc Blower assembly
USD980965S1 (en) 2019-05-07 2023-03-14 Carrier Corporation Leading edge of a fan blade
US11808282B1 (en) 2022-03-02 2023-11-07 Aaon, Inc. Propeller fan assembly with silencer seeds and concentric hub and method of use

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1872749A (en) * 1930-12-06 1932-08-23 Karageorge James Fan blade
US6000919A (en) * 1999-02-17 1999-12-14 Hsieh; Hsin-Mao Fan with reduced thickness
US20090301485A1 (en) * 2005-10-28 2009-12-10 Resmed Limited Single or multiple stage blower and nested volute(s) and or impeller(s) thereof
US20100266428A1 (en) * 2008-01-07 2010-10-21 Suguru Nakagawa Propeller fan

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1872749A (en) * 1930-12-06 1932-08-23 Karageorge James Fan blade
US6000919A (en) * 1999-02-17 1999-12-14 Hsieh; Hsin-Mao Fan with reduced thickness
US20090301485A1 (en) * 2005-10-28 2009-12-10 Resmed Limited Single or multiple stage blower and nested volute(s) and or impeller(s) thereof
US20100266428A1 (en) * 2008-01-07 2010-10-21 Suguru Nakagawa Propeller fan

Cited By (21)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
USD289525S (en) * 1984-10-01 1987-04-28 Industrial Tools, Inc. Slicing machine for magnetic tape or the like
US20150118037A1 (en) * 2013-10-28 2015-04-30 Minebea Co., Ltd. Centrifugal fan
WO2016062132A1 (en) * 2014-10-24 2016-04-28 常州格力博有限公司 Axial flow blower fan blade
US10662975B2 (en) 2015-04-08 2020-05-26 Horton, Inc. Fan blade surface features
US10539157B2 (en) 2015-04-08 2020-01-21 Horton, Inc. Fan blade surface features
USD782639S1 (en) * 2015-06-24 2017-03-28 Mitsubishi Electric Corporation Propeller fan
USD800890S1 (en) 2015-06-24 2017-10-24 Mitsubishi Electric Corporation Propeller fan
USD800889S1 (en) 2015-06-24 2017-10-24 Mitsubishi Electric Corporation Propeller fan
USD803378S1 (en) 2015-06-24 2017-11-21 Mitsubishi Electric Corporation Propeller fan
USD797917S1 (en) * 2015-08-17 2017-09-19 Delta T Corporation Fan with light
USD859630S1 (en) * 2015-11-20 2019-09-10 Kichler Lighting Llc Ceiling fan
USD965764S1 (en) * 2015-11-20 2022-10-04 Kichler Lighting Llc Ceiling fan
USD940759S1 (en) * 2015-12-01 2022-01-11 Transportation Ip Holdings, Llc Blower assembly
WO2018107353A1 (en) * 2016-12-13 2018-06-21 华为技术有限公司 Device, apparatus and method for monitoring heat dissipation states of devices
USD884874S1 (en) * 2018-01-13 2020-05-19 Guangdong Midea Environmental Appliances Manufacturing Co., Ltd Turbo heater blade
CN108980102A (en) * 2018-09-07 2018-12-11 袁毛毛 A kind of blade structure of stealth fan lamp
USD910834S1 (en) * 2018-12-05 2021-02-16 Asia Vital Components Co., Ltd. Impeller for a fan
WO2020125128A1 (en) * 2018-12-19 2020-06-25 珠海格力电器股份有限公司 Axial flow fan blade, ventilation device and air conditioner
US11187083B2 (en) 2019-05-07 2021-11-30 Carrier Corporation HVAC fan
USD980965S1 (en) 2019-05-07 2023-03-14 Carrier Corporation Leading edge of a fan blade
US11808282B1 (en) 2022-03-02 2023-11-07 Aaon, Inc. Propeller fan assembly with silencer seeds and concentric hub and method of use

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Owner name: COOLER MASTER CO., LTD., TAIWAN

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:HU, KAI-HSIANG;XU, SHI-MAN;LAI, JIA-SHENG;AND OTHERS;REEL/FRAME:029342/0926

Effective date: 20121018

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Owner name: COOLER MASTER DEVELOPMENT CORPORATION, TAIWAN

Free format text: CHANGE OF NAME;ASSIGNOR:COOLER MASTER CO., LTD.;REEL/FRAME:032088/0149

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STCB Information on status: application discontinuation

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