US20070031248A1 - Passive fan assembly - Google Patents
Passive fan assembly Download PDFInfo
- Publication number
- US20070031248A1 US20070031248A1 US11/295,506 US29550605A US2007031248A1 US 20070031248 A1 US20070031248 A1 US 20070031248A1 US 29550605 A US29550605 A US 29550605A US 2007031248 A1 US2007031248 A1 US 2007031248A1
- Authority
- US
- United States
- Prior art keywords
- fan assembly
- passive fan
- blades
- airflow
- impeller
- 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
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
- 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
- F04D29/40—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
- F04D29/542—Bladed diffusers
- F04D29/544—Blade shapes
Definitions
- the invention relates to a passive fan assembly, and in particular, to a passive fan assembly provided with guide blades for increasing the kinetic energy received by the impeller of the assembly in operation and promoting the efficiency of energy transfer.
- a fan is used together with a motor.
- the motor rotates the fan to dissipate heat.
- a conventional fan presents the following drawbacks.
- a fan and a motor are generally used together, thus, a consumer must pay for the motor and the fan.
- the motor, coupled to a fan occupies additional space even if the size of the motor is minimized.
- more than one fan and motor are required. More motors used in the electronic system indicate more power has to be provided and consumed, which does not conform to the trend of saving power.
- a passive fan assembly capable of providing an improved heat-dissipating efficiency by effectively using airflow is desirable.
- the invention provides a passive fan assembly comprising a plurality of guide blades disposed in front of an impeller.
- the guide blades extend at about 90 degrees relative to blades of the impeller.
- the airflow passes through the guide blades, turns, and impacts on the blades of the impeller at about 90 degrees, thereby effectively rotating the impeller and promoting the heat-dissipating efficiency.
- a passive fan assembly in accordance with an exemplary embodiment of the invention includes a base, an impeller connected to the base, and a cover disposed in front of the impeller and connected to the base.
- the impeller includes a hub, a plurality of runner blades disposed around the hub, a partition connected to ends of the runner blades, a plurality of active blades disposed around the partition, and a rotary shaft axially extending from the hub.
- the base includes a frame, a bearing seat, a plurality of connecting elements connecting the frame and the bearing seat, and a bearing disposed in the bearing seat for holding the rotary shaft of the impeller.
- the cover includes a frame, a stationary part, a plurality of guide blades disposed around the stationary part, a stationary ring connected to ends of the guide blades, and a plurality of supporting elements connecting the stationary ring and the frame.
- the guide blade of the cover extends at about 90 degrees relative to the runner blade of the impeller.
- the airflow passes through the guide blades, turns, and impacts the runner blades at about 90 degrees, which accordingly drives the active blades to rotate.
- the passive fan assembly of the invention is capable of effectively using the airflow and promoting the heat-dissipating efficiency.
- FIG. 1 is a perspective view of the passive fan assembly in accordance with the invention
- FIG. 2 is an exploded view of a passive fan assembly of FIG. 1 ;
- FIG. 3 shows the arrangement of a guide blade and a runner blade of FIG. 2 ;
- FIG. 4 is a sectional view of a passive fan assembly in accordance with the invention.
- FIG. 5A is a velocity diagram of airflow entering a passive fan assembly, wherein the passive fan assembly has no guide blades;
- FIG. 5B is a velocity diagram of airflow entering the passive fan assembly of the invention, wherein the passive fan assembly has guide blades.
- a passive fan assembly in accordance with an embodiment of the invention includes a base 1 , an impeller 2 mounted on the base 1 , and a cover 3 disposed in front of the impeller 2 and connected to the base 1 .
- the impeller 2 includes a hub 20 , a plurality of runner blades 22 encircling the hub 20 , a partition 24 connected to ends of the runner blades 22 , a plurality of active blades 26 encircling the partition 24 , and a rotary shaft 28 axially extending from the hub 20 .
- the base 1 includes a frame 10 , a bearing seat 12 , a plurality of ribs 14 connecting the frame 10 and the bearing seat 12 , and at least one bearing 16 disposed in the bearing seat 12 for holding the rotary shaft 28 of the impeller 2 .
- the bearing 16 may be a bushing bearing, a ball bearing, a magnetic bearing or any other bearing in which the rotary shaft 28 can be stably rotated.
- a plurality of airflow-guiding blades can be substituted for the ribs 14 in the base 1 to guide airflow.
- the cover 3 includes a frame 30 , a stationary part 32 , a plurality of guide blades 34 disposed around the stationary part 32 , a stationary ring 36 connected to ends of the guide blades 34 , and a plurality of supporting elements 38 connecting the stationary ring 36 and the frame 30 .
- the guide blade 34 of the cover 3 is approximately perpendicular to the runner blade 22 of the impeller 2 .
- the airflow turns and impacts the runner blade 22 at about 90 degrees, which drives the active blades 26 to rotate.
- the cover 3 of the passive fan assembly is connected to the airflow outlet 4 of an airflow-generating device (e.g. an axial fan or an air blower) in the airflow-providing system.
- an airflow-generating device e.g. an axial fan or an air blower
- high-pressure airflow generated by the airflow-generating device entirely enters the passive fan assembly through the guide blades 34 .
- the guide blades 34 have inclined surfaces to change the direction of the airflow so that the airflow can effectively impact the runner blades 22 of the impeller 2 .
- FIG. 5A is a velocity diagram of airflow entering a passive fan assembly, wherein the passive fan assembly has no guide blades.
- the airflow, generated by an airflow-generating device, is axial high-pressure airflow and has a velocity V in .
- the vector V 2 of velocity V in determines the work done by the airflow on the runner blade 22 , while no work is contributed by the vector V 1 . It is therefore understood that a part of kinetic energy of the airflow is lost.
- FIG. 5B is a velocity diagram of airflow entering the passive fan assembly of the invention, wherein the passive fan assembly has guide blades 34 .
- the passive fan assembly of the invention is capable of effectively promoting the energy transfer and providing a better heat-dissipating efficiency.
Abstract
A passive fan assembly includes an impeller and a plurality of guide blades disposed in front of the impeller. The impeller includes a plurality of blades extending at about 90 degrees relative to the guide blades. Thus, when airflow enters the passive fan assembly, the guide blades guide the airflow to effectively impact on blades of the impeller.
Description
- The invention relates to a passive fan assembly, and in particular, to a passive fan assembly provided with guide blades for increasing the kinetic energy received by the impeller of the assembly in operation and promoting the efficiency of energy transfer.
- Generally, a fan is used together with a motor. The motor rotates the fan to dissipate heat.
- A conventional fan presents the following drawbacks. A fan and a motor are generally used together, thus, a consumer must pay for the motor and the fan. The motor, coupled to a fan, occupies additional space even if the size of the motor is minimized. Moreover, if the components to be cooled are disposed in different locations in an electronic system, more than one fan and motor are required. More motors used in the electronic system indicate more power has to be provided and consumed, which does not conform to the trend of saving power.
- Thus, a passive fan assembly capable of providing an improved heat-dissipating efficiency by effectively using airflow is desirable.
- The invention provides a passive fan assembly comprising a plurality of guide blades disposed in front of an impeller. The guide blades extend at about 90 degrees relative to blades of the impeller. Thus, in operation, the airflow passes through the guide blades, turns, and impacts on the blades of the impeller at about 90 degrees, thereby effectively rotating the impeller and promoting the heat-dissipating efficiency.
- A passive fan assembly in accordance with an exemplary embodiment of the invention includes a base, an impeller connected to the base, and a cover disposed in front of the impeller and connected to the base.
- The impeller includes a hub, a plurality of runner blades disposed around the hub, a partition connected to ends of the runner blades, a plurality of active blades disposed around the partition, and a rotary shaft axially extending from the hub.
- The base includes a frame, a bearing seat, a plurality of connecting elements connecting the frame and the bearing seat, and a bearing disposed in the bearing seat for holding the rotary shaft of the impeller.
- The cover includes a frame, a stationary part, a plurality of guide blades disposed around the stationary part, a stationary ring connected to ends of the guide blades, and a plurality of supporting elements connecting the stationary ring and the frame.
- The guide blade of the cover extends at about 90 degrees relative to the runner blade of the impeller. Thus, in operation, the airflow passes through the guide blades, turns, and impacts the runner blades at about 90 degrees, which accordingly drives the active blades to rotate.
- The passive fan assembly of the invention is capable of effectively using the airflow and promoting the heat-dissipating efficiency.
- The invention can be more fully understood by reading the subsequent detailed description and examples with references made to the accompanying drawings, wherein:
-
FIG. 1 is a perspective view of the passive fan assembly in accordance with the invention; -
FIG. 2 is an exploded view of a passive fan assembly ofFIG. 1 ; -
FIG. 3 shows the arrangement of a guide blade and a runner blade ofFIG. 2 ; -
FIG. 4 is a sectional view of a passive fan assembly in accordance with the invention; -
FIG. 5A is a velocity diagram of airflow entering a passive fan assembly, wherein the passive fan assembly has no guide blades; -
FIG. 5B is a velocity diagram of airflow entering the passive fan assembly of the invention, wherein the passive fan assembly has guide blades. - Referring to
FIGS. 1, 2 and 4, a passive fan assembly in accordance with an embodiment of the invention includes abase 1, animpeller 2 mounted on thebase 1, and acover 3 disposed in front of theimpeller 2 and connected to thebase 1. - The
impeller 2 includes ahub 20, a plurality ofrunner blades 22 encircling thehub 20, apartition 24 connected to ends of therunner blades 22, a plurality ofactive blades 26 encircling thepartition 24, and arotary shaft 28 axially extending from thehub 20. - The
base 1 includes aframe 10, abearing seat 12, a plurality ofribs 14 connecting theframe 10 and thebearing seat 12, and at least one bearing 16 disposed in thebearing seat 12 for holding therotary shaft 28 of theimpeller 2. Thebearing 16 may be a bushing bearing, a ball bearing, a magnetic bearing or any other bearing in which therotary shaft 28 can be stably rotated. Furthermore, a plurality of airflow-guiding blades can be substituted for theribs 14 in thebase 1 to guide airflow. - The
cover 3 includes aframe 30, astationary part 32, a plurality ofguide blades 34 disposed around thestationary part 32, astationary ring 36 connected to ends of theguide blades 34, and a plurality of supportingelements 38 connecting thestationary ring 36 and theframe 30. - Referring to
FIG. 3 , theguide blade 34 of thecover 3 is approximately perpendicular to therunner blade 22 of theimpeller 2. When passing through theguide blade 34, the airflow turns and impacts therunner blade 22 at about 90 degrees, which drives theactive blades 26 to rotate. - When the passive fan assembly of the invention is used together with an airflow-providing system, the
cover 3 of the passive fan assembly is connected to theairflow outlet 4 of an airflow-generating device (e.g. an axial fan or an air blower) in the airflow-providing system. In operation, high-pressure airflow generated by the airflow-generating device entirely enters the passive fan assembly through theguide blades 34. Theguide blades 34 have inclined surfaces to change the direction of the airflow so that the airflow can effectively impact therunner blades 22 of theimpeller 2. - The function of the
guide blades 34 of the invention can be clearly explained by referring toFIGS. 5A and 5B .FIG. 5A is a velocity diagram of airflow entering a passive fan assembly, wherein the passive fan assembly has no guide blades. The airflow, generated by an airflow-generating device, is axial high-pressure airflow and has a velocity Vin. The vector V2 of velocity Vin determines the work done by the airflow on therunner blade 22, while no work is contributed by the vector V1. It is therefore understood that a part of kinetic energy of the airflow is lost.FIG. 5B is a velocity diagram of airflow entering the passive fan assembly of the invention, wherein the passive fan assembly hasguide blades 34. When the axial airflow passes through theguide blade 34, the velocity of the axial airflow changes from Vin to Vin′ which is approximately perpendicular to therunner blade 22. Then, the airflow can fully do work on therunner blade 22 so that the kinetic energy transferred from therunner blade 22 to theactive blade 26 is maximized. Thus, the heat-dissipating efficiency of theactive blade 26 is significantly improved. - In conclusion, the passive fan assembly of the invention is capable of effectively promoting the energy transfer and providing a better heat-dissipating efficiency.
- While the invention has been described by way of example and in terms of preferred embodiment, it is to be understood that the invention is not limited thereto. To the contrary, it is intended to cover various modifications and similar arrangements (as would be apparent to those skilled in the art). Therefore, the scope of the appended claims should be accorded the broadest interpretation so as to encompass all such modifications and similar arrangements.
Claims (20)
1. A passive fan assembly comprising:
a base;
an impeller mounted on the base and comprising a hub and a plurality of blades disposed around the hub; and
a cover placed over the base and comprising a plurality of guide blades corresponding to the plurality of blades of the impeller.
2. The passive fan assembly as claimed in claim 1 , wherein each guide blade extends at an angle relative to the corresponding blade of the impeller.
3. The passive fan assembly as claimed in claim 2 , wherein the angle is approximately 90 degrees.
4. The passive fan assembly as claimed in claim 1 , wherein the impeller further comprises a plurality of active blades disposed around the plurality of blades.
5. The passive fan assembly as claimed in claim 4 , wherein the impeller further comprises a partition disposed between the plurality of blades and the active blades.
6. The passive fan assembly as claimed in claim 1 , wherein the base comprises a frame, a bearing seat for receiving at least one bearing therein, and a plurality of connecting elements connecting the frame and the bearing seat, and the impeller includes a rotary shaft extending into the bearing seat.
7. The passive fan assembly as claimed in claim 1 , wherein the cover further comprises a frame connected to the base, a stationary part around which the plurality of guide blades are disposed, a stationary ring connected to ends of the plurality of guide blades, and a plurality of supporting elements connecting the stationary ring and the frame.
8. The passive fan assembly as claimed in claim 1 , wherein the plurality of guide blades have inclined surfaces.
9. The passive fan assembly as claimed in claim 1 , wherein the passive fan assembly is driven by an airflow generated by an airflow-providing system, and the airflow passes through the plurality of guide blades into the passive fan assembly.
10. The passive fan assembly as claimed in claim 9 , wherein the airflow-providing system comprises an axial fan or an air blower.
11. The passive fan assembly as claimed in claim 9 , wherein the airflow-providing system comprises an airflow outlet connected to the cover of the passive fan assembly.
12. A passive fan assembly comprising:
a housing comprising a plurality of guide blades on a side thereof;
an impeller installed in the housing, comprising a hub, a plurality of blades encircling the hub, a partition connected to ends of the plurality of blades, and a plurality of active blades encircling the partition.
13. The passive fan assembly as claimed in claim 12 , wherein the plurality of guide blades corresponds to the plurality of blades of the impeller.
14. The passive fan assembly as claimed in claim 13 , wherein each guide blade extends at an angle relative to the corresponding runner blade of the impeller.
15. The passive fan assembly as claimed in claim 14 , wherein the angle is approximately 90 degrees.
16. The passive fan assembly as claimed in claim 12 , wherein the housing further comprises a stationary part around which the plurality of guide blades are disposed, a stationary ring connected to ends of the plurality of guide blades, and a plurality of supporting elements connecting the stationary ring and the housing.
17. The passive fan assembly as claimed in claim 12 , wherein the plurality of guide blades have inclined surfaces.
18. The passive fan assembly as claimed in claim 12 , wherein the passive fan assembly is rotated by airflow generated from an airflow-providing system and the airflow passes through the plurality of guide blades into the passive fan assembly.
19. The passive fan assembly as claimed in claim 18 , wherein the airflow-providing system comprises an axial fan or air blower.
20. The device as claimed in claim 18 , wherein the airflow-providing system comprises an airflow outlet connected to the side of the housing.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
TW094126512A TWI282392B (en) | 2005-08-04 | 2005-08-04 | Passive fan assembly |
TW94126512 | 2005-08-04 |
Publications (1)
Publication Number | Publication Date |
---|---|
US20070031248A1 true US20070031248A1 (en) | 2007-02-08 |
Family
ID=37670118
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US11/295,506 Abandoned US20070031248A1 (en) | 2005-08-04 | 2005-12-07 | Passive fan assembly |
Country Status (4)
Country | Link |
---|---|
US (1) | US20070031248A1 (en) |
JP (1) | JP2007040299A (en) |
DE (1) | DE102005060745B4 (en) |
TW (1) | TWI282392B (en) |
Cited By (13)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20060222536A1 (en) * | 2005-04-01 | 2006-10-05 | Delta Electronics, Inc. | Axial fan |
US20100215520A1 (en) * | 2008-04-29 | 2010-08-26 | Ke-Wei Chin | Electric power free auxiliary cooling device |
US20120244008A1 (en) * | 2011-03-25 | 2012-09-27 | Shun-Chen Chang | Impeller structure |
US20120302147A1 (en) * | 2011-05-26 | 2012-11-29 | Black And Decker Inc. | Airfolw arrangement for a power tool |
US20120301274A1 (en) * | 2011-05-26 | 2012-11-29 | Shun-Chen Chang | Fan assembly |
US20130149104A1 (en) * | 2011-12-09 | 2013-06-13 | Delta Electronics, Inc. | Recirculation fan and fan assembly thereof |
US20130280029A1 (en) * | 2012-04-20 | 2013-10-24 | Delta Electronics, Inc. | Axial fan and control method thereof |
US20140086730A1 (en) * | 2012-09-27 | 2014-03-27 | Delta Electronics, Inc. | Fan and pressure-increasing blade assembly thereof |
US20190008075A1 (en) * | 2017-06-30 | 2019-01-03 | Quanta Computer Inc. | Arc shape front panel |
US20190024675A1 (en) * | 2017-07-20 | 2019-01-24 | Quanta Computer Inc. | Fan front intake for server fan module |
SE1951341A1 (en) * | 2019-11-25 | 2021-05-26 | Husqvarna Ab | A battery lock mechanism for a battery compartment and an electrically powered hand-held work tool comprising such a battery lock mechanism |
US11168899B2 (en) | 2016-05-03 | 2021-11-09 | Carrier Corporation | Vane axial fan with intermediate flow control rings |
US11480196B2 (en) * | 2017-11-16 | 2022-10-25 | Nidec Corporation | Axial fan |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP5839755B1 (en) * | 2015-01-08 | 2016-01-06 | 山洋電気株式会社 | Fan casing and fan device |
DE102022210553A1 (en) | 2022-10-06 | 2024-04-11 | Ziehl-Abegg Se | Deflector for a fan and fan with a deflector |
Citations (14)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2321810A (en) * | 1941-09-08 | 1943-06-15 | John W Gurley | Rotary pump |
US3096080A (en) * | 1959-10-30 | 1963-07-02 | Willems Peter | Apparatus for generating oscillations in fluid |
US3273654A (en) * | 1966-09-20 | Movable turbine-fan unit for an aircraft jet engine | ||
US5454695A (en) * | 1994-07-05 | 1995-10-03 | Ford Motor Company | High output engine cooling fan |
US5590025A (en) * | 1995-06-07 | 1996-12-31 | Thermalloy, Inc. | Fan attachment clip for heat sink |
US5828549A (en) * | 1996-10-08 | 1998-10-27 | Dell U.S.A., L.P. | Combination heat sink and air duct for cooling processors with a series air flow |
US5951245A (en) * | 1997-10-06 | 1999-09-14 | Ford Motor Company | Centrifugal fan assembly for an automotive vehicle |
US6373698B1 (en) * | 2001-05-03 | 2002-04-16 | International Business Machines Corporation | Apparatus for cooling a computer system |
US6398492B1 (en) * | 1998-12-31 | 2002-06-04 | Halla Climate Control Corp. | Airflow guide stator vane for axial flow fan and shrouded axial flow fan assembly having such airflow guide stator vanes |
US6549406B1 (en) * | 2002-05-09 | 2003-04-15 | Sun Microsystems, Inc. | Fan tray assembly for an electronics enclosure |
US6663342B2 (en) * | 2001-08-01 | 2003-12-16 | Delta Electronics Inc. | Composite heat-dissipating system and its used fan guard with additional supercharging function |
US6863496B2 (en) * | 2002-02-27 | 2005-03-08 | Halla Climate Control Corporation | Fan and shroud assembly |
US7145771B2 (en) * | 2003-06-17 | 2006-12-05 | Wistron Neweb Corp. | System structure and fan module thereof |
US7220102B2 (en) * | 2003-07-01 | 2007-05-22 | Halla Climate Control Corporation | Guide blade of axial-flow fan shroud |
Family Cites Families (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6540479B2 (en) * | 2001-07-16 | 2003-04-01 | William C. Liao | Axial flow fan |
US6799942B1 (en) * | 2003-09-23 | 2004-10-05 | Inventec Corporation | Composite fan |
-
2005
- 2005-08-04 TW TW094126512A patent/TWI282392B/en active
- 2005-12-07 US US11/295,506 patent/US20070031248A1/en not_active Abandoned
- 2005-12-16 DE DE102005060745A patent/DE102005060745B4/en active Active
-
2006
- 2006-06-29 JP JP2006179019A patent/JP2007040299A/en not_active Withdrawn
Patent Citations (14)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3273654A (en) * | 1966-09-20 | Movable turbine-fan unit for an aircraft jet engine | ||
US2321810A (en) * | 1941-09-08 | 1943-06-15 | John W Gurley | Rotary pump |
US3096080A (en) * | 1959-10-30 | 1963-07-02 | Willems Peter | Apparatus for generating oscillations in fluid |
US5454695A (en) * | 1994-07-05 | 1995-10-03 | Ford Motor Company | High output engine cooling fan |
US5590025A (en) * | 1995-06-07 | 1996-12-31 | Thermalloy, Inc. | Fan attachment clip for heat sink |
US5828549A (en) * | 1996-10-08 | 1998-10-27 | Dell U.S.A., L.P. | Combination heat sink and air duct for cooling processors with a series air flow |
US5951245A (en) * | 1997-10-06 | 1999-09-14 | Ford Motor Company | Centrifugal fan assembly for an automotive vehicle |
US6398492B1 (en) * | 1998-12-31 | 2002-06-04 | Halla Climate Control Corp. | Airflow guide stator vane for axial flow fan and shrouded axial flow fan assembly having such airflow guide stator vanes |
US6373698B1 (en) * | 2001-05-03 | 2002-04-16 | International Business Machines Corporation | Apparatus for cooling a computer system |
US6663342B2 (en) * | 2001-08-01 | 2003-12-16 | Delta Electronics Inc. | Composite heat-dissipating system and its used fan guard with additional supercharging function |
US6863496B2 (en) * | 2002-02-27 | 2005-03-08 | Halla Climate Control Corporation | Fan and shroud assembly |
US6549406B1 (en) * | 2002-05-09 | 2003-04-15 | Sun Microsystems, Inc. | Fan tray assembly for an electronics enclosure |
US7145771B2 (en) * | 2003-06-17 | 2006-12-05 | Wistron Neweb Corp. | System structure and fan module thereof |
US7220102B2 (en) * | 2003-07-01 | 2007-05-22 | Halla Climate Control Corporation | Guide blade of axial-flow fan shroud |
Cited By (22)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20060222536A1 (en) * | 2005-04-01 | 2006-10-05 | Delta Electronics, Inc. | Axial fan |
US20100215520A1 (en) * | 2008-04-29 | 2010-08-26 | Ke-Wei Chin | Electric power free auxiliary cooling device |
US8192177B2 (en) * | 2008-04-29 | 2012-06-05 | Yeou Chih Corporation | Auxiliary cooling device |
US20120244008A1 (en) * | 2011-03-25 | 2012-09-27 | Shun-Chen Chang | Impeller structure |
US20120302147A1 (en) * | 2011-05-26 | 2012-11-29 | Black And Decker Inc. | Airfolw arrangement for a power tool |
US20120301274A1 (en) * | 2011-05-26 | 2012-11-29 | Shun-Chen Chang | Fan assembly |
US8348727B2 (en) * | 2011-05-26 | 2013-01-08 | Black & Decker Inc. | Airflow arrangement for a power tool |
US9447789B2 (en) * | 2011-05-26 | 2016-09-20 | Delta Electronics, Inc. | Fan assembly |
US9051939B2 (en) * | 2011-12-09 | 2015-06-09 | Delta Electronics, Inc. | Recirculation fan and fan assembly thereof |
US20130149104A1 (en) * | 2011-12-09 | 2013-06-13 | Delta Electronics, Inc. | Recirculation fan and fan assembly thereof |
US20130280029A1 (en) * | 2012-04-20 | 2013-10-24 | Delta Electronics, Inc. | Axial fan and control method thereof |
US9963970B2 (en) * | 2012-04-20 | 2018-05-08 | Delta Electronics, Inc. | Axial fan and control method thereof |
US10570740B2 (en) | 2012-04-20 | 2020-02-25 | Delta Electronics, Inc. | Axial fan and control method thereof |
US9745984B2 (en) * | 2012-09-27 | 2017-08-29 | Delta Electronics, Inc. | Fan and pressure-increasing blade assembly thereof |
US20140086730A1 (en) * | 2012-09-27 | 2014-03-27 | Delta Electronics, Inc. | Fan and pressure-increasing blade assembly thereof |
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 |
US20190008075A1 (en) * | 2017-06-30 | 2019-01-03 | Quanta Computer Inc. | Arc shape front panel |
US20190024675A1 (en) * | 2017-07-20 | 2019-01-24 | Quanta Computer Inc. | Fan front intake for server fan module |
US11480196B2 (en) * | 2017-11-16 | 2022-10-25 | Nidec Corporation | Axial fan |
SE543800C2 (en) * | 2019-11-25 | 2021-07-27 | Husqvarna Ab | A battery lock mechanism for a battery compartment and an electrically powered hand-held work tool comprising such a battery lock mechanism |
SE1951341A1 (en) * | 2019-11-25 | 2021-05-26 | Husqvarna Ab | A battery lock mechanism for a battery compartment and an electrically powered hand-held work tool comprising such a battery lock mechanism |
Also Published As
Publication number | Publication date |
---|---|
DE102005060745A1 (en) | 2007-02-08 |
JP2007040299A (en) | 2007-02-15 |
TW200706764A (en) | 2007-02-16 |
DE102005060745B4 (en) | 2012-09-27 |
TWI282392B (en) | 2007-06-11 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
US20070031248A1 (en) | Passive fan assembly | |
JP5286689B2 (en) | Cooling fan unit | |
US6612817B2 (en) | Serial fan | |
US8007234B2 (en) | Axial fan unit having coaxially arranged axial fans | |
US7507068B2 (en) | Heat-dissipating mechanism for a motor | |
US8506264B2 (en) | Motor and cooling fan with a circuit board having a heat-conducting insulator | |
CN100517917C (en) | Power tool | |
US7946805B2 (en) | Fan unit including tapered airflow passage | |
US6386276B1 (en) | Heat-dissipating device | |
US8087905B2 (en) | Cooling apparatus for an electronic device to be cooled | |
US20080031723A1 (en) | Axial fan unit | |
US20020141866A1 (en) | Fan with improved self-cooling capability | |
US20050207888A1 (en) | Centrifugal fan and casing thereof | |
JPH1175340A (en) | Motor | |
US20080106867A1 (en) | Fan motor device and electronic apparatus | |
US20080175729A1 (en) | Axial flow fan | |
US8366419B2 (en) | Inner rotor type motor and heat dissipating fan including the inner rotor type motor | |
JPWO2007043119A1 (en) | Fan device | |
US20030210992A1 (en) | Heat-dissipating device | |
US8821227B2 (en) | Heat dissipating system | |
US20070264123A1 (en) | Counter-rotating fan | |
US7390166B2 (en) | Rotary structure for radiation fans | |
US7988407B2 (en) | Axial fan | |
US20070140836A1 (en) | Blower | |
US7758322B2 (en) | Fan system |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
AS | Assignment |
Owner name: DELTA ELECTRONICS, INC., TAIWAN Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:HSU, CHIA-MING;CHANG, SHUN-CHEN;HUANG, WEN-SHI;REEL/FRAME:017294/0987;SIGNING DATES FROM 20051006 TO 20051007 |
|
STCB | Information on status: application discontinuation |
Free format text: ABANDONED -- FAILURE TO RESPOND TO AN OFFICE ACTION |