US20080240921A1 - Fan and impeller thereof - Google Patents
Fan and impeller thereof Download PDFInfo
- Publication number
- US20080240921A1 US20080240921A1 US12/028,648 US2864808A US2008240921A1 US 20080240921 A1 US20080240921 A1 US 20080240921A1 US 2864808 A US2864808 A US 2864808A US 2008240921 A1 US2008240921 A1 US 2008240921A1
- Authority
- US
- United States
- Prior art keywords
- hub
- fan
- impeller
- angle
- guiding structure
- 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
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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
- F04D29/40—Casings; Connections of working fluid
- F04D29/52—Casings; Connections of working fluid for axial pumps
- F04D29/522—Casings; Connections of working fluid for axial pumps especially adapted for elastic fluid pumps
- F04D29/526—Details of the casing section radially opposing blade tips
-
- 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
- F04D29/329—Details of the hub
Definitions
- the present invention relates to a fan and an impeller thereof, and in particular to a fan and the impeller thereof with increased performance.
- the efficiency of a fan is evaluated by the air pressure and air flow that it can generate.
- one method is to increase its rotation speed.
- noises come with high-speed rotations.
- FIG. 1 is a cross-sectional view of a conventional fan 1 .
- the fan 1 includes a fan frame 10 , a motor 11 and an impeller 12 .
- the impeller 12 includes a hub 121 and several blades 122 disposed around the hub 121 .
- the hub 121 has a vertical structure. When air is guided into the fan via the inlet 101 , it is directly guided out via the outlet 102 by the second guiding angle 109 because of the vertical structure of the hub 121 . As a result, there is no significant increase in the airflow pressure. Consequently, the conventional fan 1 cannot provide good performance.
- the present invention is to provide an impeller that can increase the air pressure and air flow of a fan.
- the present invention is also to provide a fan that has an airflow guiding structure formed with the hub for decreasing the airflow channel so as to increase the air flow and air pressure thereof.
- an impeller including a hub and a plurality of blades.
- the hub has at least one curve-shape surface, and the blades are disposed around the hub.
- a ratio of an outer diameter of the top surface and an outer diameter of the bottom surface is smaller than 0.45.
- a tangential angle between the curve-shape surface and the top surface is between 0 and 45 degrees, and an angle between the curve-shape surface and the bottom surface is between 30 and 75 degrees.
- the curve-shape surface of the hub is continuous or discontinuous.
- An angle between a horizontal line and a line connecting both ends of the curve-shape surface of the hub is smaller than 70 degrees.
- the present invention also discloses a fan including a fan frame, an impeller and a motor.
- the impeller is disposed in the fan frame, and the motor is disposed in the impeller for driving the impeller.
- the impeller includes a hub and a plurality of blades disposed around the hub.
- the hub has at least one curve-shape surface and an airflow guiding structure disposed on an outer circumference of the hub.
- the airflow guiding structure and the hub are integrally formed as a single unit.
- the fan frame includes a connecting element disposed between the fan frame and the base.
- the connecting element, the fan frame and the base are integrally formed as a single unit.
- the connecting element includes a plurality of ribs or stationary blades.
- the fan of the present invention utilizes an airflow guiding structure disposed on the hub to shrink the airflow channel, thereby squeezing the airflow to change its flowing speed.
- the airflow speed is increased so that the air flow and air pressure of the fan are both promoted, thereby improving the performance of the fan.
- FIG. 1 is a cross-sectional view of a conventional fan
- FIG. 2 is a cross-sectional view of a fan according to an embodiment of the present invention.
- FIG. 3 is a schematic illustration showing the curves of the air flow and air pressure of the fans of the present invention and the conventional fan.
- FIG. 2 is a cross-sectional view of a fan according to an embodiment of the present invention.
- a fan 2 which is preferably an axial-flow fan, includes a fan frame 20 , an impeller 30 and a motor 40 .
- the impeller 30 and the motor 40 are disposed within the fan frame 20 .
- the fan frame 20 includes a main body 201 with a through hole to form an inlet 21 , and an outlet 22 .
- the fan frame can have a roughly square, circular; elliptical or rhombus shape.
- the fan frame 20 includes a base 202 and at least one connecting element 204 .
- the base 202 is preferably disposed near the outlet 22 of the fan 2 .
- the connecting element 204 is disposed between the main body 201 and the base 202 for supporting the base 202 .
- the connecting element 204 can be several ribs or stationary blades and is integrally formed with the base 202 and the main body 201 as a single unit.
- the impeller 30 has a hub 301 and several blades 302 disposed around the hub 301 .
- the motor 40 is disposed inside the hub 301 .
- the impeller 30 is disposed on the base 202 of the fan frame 20 .
- the motor 40 drives the impeller 30 to rotate.
- the impeller 30 having a hub has an airflow guiding structure 303 formed with the outer circumference of the hub 301 .
- the airflow guiding structure can be integrally formed with the hub 301 as a single unit.
- the hub 301 of the impeller 30 has a top surface 311 and a bottom surface 312 .
- the outer diameter of the hub 301 increases progressively from the top surface 311 to the bottom surface 312 .
- the blades 302 of the impeller 30 are disposed around the circumference of the airflow guiding structure 303 and the blades 302 extend beyond the airflow guiding structure 303 to cover the base 202 .
- the airflow guiding structure 303 has at least one curve-shape surface that involves a continuous or discontinuous surface.
- the hub 301 can also have a curve-shape surface, and the airflow guiding structure 303 is disposed on the outer circumference of the hub 301 . Due to the design of the impeller 30 , the airflow is squeezed by the decreasing airflow channel as it enters the inlet 21 and flows through the airflow guiding structure 303 . Therefore, both the airflow speed and pressure can be increased.
- the impeller 30 is described with reference to FIG. 2 as follows.
- the ratio of the outer diameter D 1 of the top surface 311 of the hub 301 and the outer diameter D 2 of the bottom surface 312 of the hub 301 is smaller than 0.45.
- the ratio of the outer diameter D 1 of the top surface 311 of the hub 301 and the inner diameter D 3 of the fan frame 20 is smaller than 0.35.
- the ratio of the height H 1 of the hub 301 and the height H 3 of the fan frame 20 is greater than 0.6.
- the tangential angle ⁇ 1 between the airflow guiding structure 303 and the top surface 311 is between 0 and 45 degrees.
- the angle ⁇ 2 between the airflow guiding structure 303 and the bottom surfaced 312 is between 30 and 75 degrees.
- the line connecting both ends of the curved surface of the airflow guiding structure 303 and the horizontal line have an angle ⁇ 3 smaller than 70 degrees.
- the main body 201 has a first guiding angle 208 and a second guiding angle 209 at the inlet 21 and the outlet 22 , respectively.
- the first guiding angle 208 and the second guiding angle 209 are formed along the inclined planes for guiding more airflow in and out. Therefore, air enters via the inlet 21 , goes into the fan frame, guided by the guiding angle, and flows toward the outlet 22 . Since the airflow guiding structure 303 is a continuous curved surface, the shrinking airflow channel squeezes the airflow and speeds it up as it flows through the airflow guiding structure 303 . At the same time, the airflow pressure increases.
- FIG. 3 is a schematic illustration showing the curves of the air flow and air pressure of the fan of the present invention and the conventional fan.
- Experimental data show that the fan of the present invention can effectively increase the air flow and air pressure.
- the maximum air pressure of the present invention is about 1.4 times larger than the prior art.
- the maximum air flow of the present invention is increased about 1.15 times.
- the fan of the present invention has the following advantages. Using the disclosed airflow guiding structure disposed on the hub, the shrinking airflow channel squeezes the airflow to change its flowing speed. Compared with the related art, the airflow speed is increased so that the air flow and air pressure of the fan are both promoted, thereby improving the performance of the fan.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
Abstract
An impeller used in a fan is provided. The impeller includes a hub and a plurality of blades disposed around the hub. The hub has at least one curve-shape surface. A fan comprises a fan frame, an impeller, and a motor. The impeller disposed in the fan frame comprises a hub and a plurality of blades disposed around the hub, wherein the hub has at least one curve-shape surface and an airflow guiding structure disposed on an outer circumference of the hub. The motor is disposed in the impeller for driving the impeller.
Description
- This Non-provisional application claims priority under 35 U.S.C. §119(a) on Patent Application No(s). 096111219, filed in Taiwan, Republic of China on Mar. 30, 2007, the entire contents of which are hereby incorporated by reference.
- 1. Field of Invention
- The present invention relates to a fan and an impeller thereof, and in particular to a fan and the impeller thereof with increased performance.
- 2. Related Art
- The efficiency of a fan is evaluated by the air pressure and air flow that it can generate. To increase the air pressure and air flow, one method is to increase its rotation speed. However, noises come with high-speed rotations.
-
FIG. 1 is a cross-sectional view of aconventional fan 1. Thefan 1 includes afan frame 10, amotor 11 and animpeller 12. - The
impeller 12 includes ahub 121 andseveral blades 122 disposed around thehub 121. However, since the space inside thefan frame 10 is insufficient, thehub 121 has a vertical structure. When air is guided into the fan via theinlet 101, it is directly guided out via theoutlet 102 by the second guidingangle 109 because of the vertical structure of thehub 121. As a result, there is no significant increase in the airflow pressure. Consequently, theconventional fan 1 cannot provide good performance. - In view of the foregoing, the present invention is to provide an impeller that can increase the air pressure and air flow of a fan.
- In addition, the present invention is also to provide a fan that has an airflow guiding structure formed with the hub for decreasing the airflow channel so as to increase the air flow and air pressure thereof.
- To achieve the above, the present invention discloses an impeller including a hub and a plurality of blades. The hub has at least one curve-shape surface, and the blades are disposed around the hub. A ratio of an outer diameter of the top surface and an outer diameter of the bottom surface is smaller than 0.45. A tangential angle between the curve-shape surface and the top surface is between 0 and 45 degrees, and an angle between the curve-shape surface and the bottom surface is between 30 and 75 degrees. The curve-shape surface of the hub is continuous or discontinuous. An angle between a horizontal line and a line connecting both ends of the curve-shape surface of the hub is smaller than 70 degrees.
- To achieve the above, the present invention also discloses a fan including a fan frame, an impeller and a motor. The impeller is disposed in the fan frame, and the motor is disposed in the impeller for driving the impeller. The impeller includes a hub and a plurality of blades disposed around the hub. The hub has at least one curve-shape surface and an airflow guiding structure disposed on an outer circumference of the hub. The airflow guiding structure and the hub are integrally formed as a single unit. The fan frame includes a connecting element disposed between the fan frame and the base. The connecting element, the fan frame and the base are integrally formed as a single unit. The connecting element includes a plurality of ribs or stationary blades.
- As mentioned above, the fan of the present invention utilizes an airflow guiding structure disposed on the hub to shrink the airflow channel, thereby squeezing the airflow to change its flowing speed. Compared with the related art, the airflow speed is increased so that the air flow and air pressure of the fan are both promoted, thereby improving the performance of the fan.
- The present invention will become more fully understood from the detailed description and accompanying drawings, which are given for illustration only, and thus are not limitative of the present invention, and wherein:
-
FIG. 1 is a cross-sectional view of a conventional fan; -
FIG. 2 is a cross-sectional view of a fan according to an embodiment of the present invention; and -
FIG. 3 is a schematic illustration showing the curves of the air flow and air pressure of the fans of the present invention and the conventional fan. - The present invention will be apparent from the following detailed description, which proceeds with reference to the accompanying drawings, wherein the same references relate to the same elements.
-
FIG. 2 is a cross-sectional view of a fan according to an embodiment of the present invention. Referring toFIG. 2 , afan 2, which is preferably an axial-flow fan, includes afan frame 20, animpeller 30 and amotor 40. Theimpeller 30 and themotor 40 are disposed within thefan frame 20. Thefan frame 20 includes amain body 201 with a through hole to form aninlet 21, and anoutlet 22. The fan frame can have a roughly square, circular; elliptical or rhombus shape. Furthermore, thefan frame 20 includes abase 202 and at least one connectingelement 204. Thebase 202 is preferably disposed near theoutlet 22 of thefan 2. The connectingelement 204 is disposed between themain body 201 and thebase 202 for supporting thebase 202. In this embodiment, the connectingelement 204 can be several ribs or stationary blades and is integrally formed with thebase 202 and themain body 201 as a single unit. Moreover, theimpeller 30 has ahub 301 andseveral blades 302 disposed around thehub 301. Themotor 40 is disposed inside thehub 301. Theimpeller 30 is disposed on thebase 202 of thefan frame 20. Themotor 40 drives theimpeller 30 to rotate. - It should be noted that to increase the air pressure and air flow of the fan, the
impeller 30 having a hub has anairflow guiding structure 303 formed with the outer circumference of thehub 301. The airflow guiding structure can be integrally formed with thehub 301 as a single unit. In this embodiment, thehub 301 of theimpeller 30 has atop surface 311 and abottom surface 312. The outer diameter of thehub 301 increases progressively from thetop surface 311 to thebottom surface 312. Theblades 302 of theimpeller 30 are disposed around the circumference of theairflow guiding structure 303 and theblades 302 extend beyond theairflow guiding structure 303 to cover thebase 202. Theairflow guiding structure 303 has at least one curve-shape surface that involves a continuous or discontinuous surface. Thehub 301 can also have a curve-shape surface, and theairflow guiding structure 303 is disposed on the outer circumference of thehub 301. Due to the design of theimpeller 30, the airflow is squeezed by the decreasing airflow channel as it enters theinlet 21 and flows through theairflow guiding structure 303. Therefore, both the airflow speed and pressure can be increased. - The
impeller 30 is described with reference toFIG. 2 as follows. The ratio of the outer diameter D1 of thetop surface 311 of thehub 301 and the outer diameter D2 of thebottom surface 312 of thehub 301 is smaller than 0.45. The ratio of the outer diameter D1 of thetop surface 311 of thehub 301 and the inner diameter D3 of thefan frame 20 is smaller than 0.35. The ratio of the height H1 of thehub 301 and the height H3 of thefan frame 20 is greater than 0.6. The tangential angle θ1 between theairflow guiding structure 303 and thetop surface 311 is between 0 and 45 degrees. The angle θ2 between theairflow guiding structure 303 and the bottom surfaced 312 is between 30 and 75 degrees. The line connecting both ends of the curved surface of theairflow guiding structure 303 and the horizontal line have an angle θ3 smaller than 70 degrees. - When the
motor 40 operates and drives theimpeller 30 to rotate, theblades 302 around thehub 301 rotate and generate a pressure difference between thefan 2 and the external environment. Themain body 201 has afirst guiding angle 208 and asecond guiding angle 209 at theinlet 21 and theoutlet 22, respectively. Thefirst guiding angle 208 and thesecond guiding angle 209 are formed along the inclined planes for guiding more airflow in and out. Therefore, air enters via theinlet 21, goes into the fan frame, guided by the guiding angle, and flows toward theoutlet 22. Since theairflow guiding structure 303 is a continuous curved surface, the shrinking airflow channel squeezes the airflow and speeds it up as it flows through theairflow guiding structure 303. At the same time, the airflow pressure increases. -
FIG. 3 is a schematic illustration showing the curves of the air flow and air pressure of the fan of the present invention and the conventional fan. Experimental data show that the fan of the present invention can effectively increase the air flow and air pressure. For example, at the same air flow, the maximum air pressure of the present invention is about 1.4 times larger than the prior art. At the same air pressure, the maximum air flow of the present invention is increased about 1.15 times. - In summary, the fan of the present invention has the following advantages. Using the disclosed airflow guiding structure disposed on the hub, the shrinking airflow channel squeezes the airflow to change its flowing speed. Compared with the related art, the airflow speed is increased so that the air flow and air pressure of the fan are both promoted, thereby improving the performance of the fan.
- Although the present invention has been described with reference to specific embodiments, this description is not meant to be construed in a limiting sense. Various modifications of the disclosed embodiments, as well as alternative embodiments, will be apparent to persons skilled in the art. It is, therefore, contemplated that the appended claims will cover all modifications that fall within the true scope of the present invention.
Claims (20)
1. An impeller, comprising:
a hub comprising an airflow guiding structure formed with an outer circumference of the hub; and
a plurality of blades disposed around the hub.
2. The impeller of claim 1 , wherein the hub has a top surface and a bottom surface, and an outer diameter of the hub increases progressively from the top surface to the bottom surface.
3. The impeller of claim 2 , wherein a ratio of the outer diameter of the top surface and the outer diameter of the bottom surface is smaller than 0.45.
4. The impeller of claim 4 , wherein the airflow guiding structure comprises at least one curve-shape surface.
5. The impeller of claim 4 , wherein a tangential angle between the curve-shape surface and the top surface is between 0 and 45 degrees.
6. The impeller of claim 4 , wherein an angle between the curve-shape surface and the bottom surface is between 30 and 75 degrees.
7. The impeller of claim 4 , wherein an angle between a horizontal line and a line connecting both ends of the curve-shape surface of the hub is smaller than 70 degrees.
8. A fan, comprising:
a fan frame;
an impeller disposed in the fan frame, and comprising a hub and a plurality of blades disposed around the hub, wherein the hub comprises an airflow guiding structure formed with an outer circumference of the hub; and
a motor disposed in the fan frame for driving the impeller to rotate.
9. The fan of claim 8 , wherein the airflow guiding structure and the hub are integrally formed as a single unit.
10. The fan of claim 8 , wherein the hub has a top surface and a bottom surface, and an outer diameter of the hub increases progressively from the top surface to the bottom surface.
11. The fan of claim 10 , wherein a ratio of the outer diameter of the top surface and the outer diameter of the bottom surface is smaller than 0.45 or a ratio of the outer diameter of the top surface of the hub and an inner diameter of the fan frame is smaller than 0.35.
12. The fan of claim 10 , wherein a tangential angle between the airflow guiding structure and the top surface of the hub is between 0 and 45 degrees or an angle between the airflow guiding structure and the bottom surface of the hub is between 30 and 75 degrees.
13. The fan of claim 8 , wherein a ratio of a height of the hub and a height of the fan frame is greater than 0.6.
14. The fan of claim 8 , wherein the airflow guiding structure comprises at least one curve-shape surface.
15. The fan of claim 14 , wherein an angle between a horizontal line and a line connecting both ends of the curve-shape surface of the hub is smaller than 70 degrees.
16. The fan of claim 8 , wherein the fan flame comprises a main body, and the main body has a first guiding angle and a second guiding angle at the inlet and the outlet respectively, and the first guiding angle and the second guiding angle are formed along the inclined plane for guiding more airflow in and out.
17. The fan of claim 16 , wherein the fan frame comprises a base and a plurality of connecting elements disposed between the main body and the base.
18. The fan of claim 17 , wherein the blades extend beyond the airflow guiding structure to cover the base.
19. The fan of claim 17 , wherein the connecting element, the main body, and the base are integrally formed as a single unit.
20. The fan of claim 17 , wherein the connecting elements comprise a plurality of ribs or stationary blades.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
TW096111219A TWI328080B (en) | 2007-03-30 | 2007-03-30 | Fan and impeller thereof |
TW096111219 | 2007-03-30 |
Publications (1)
Publication Number | Publication Date |
---|---|
US20080240921A1 true US20080240921A1 (en) | 2008-10-02 |
Family
ID=39794689
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US12/028,648 Abandoned US20080240921A1 (en) | 2007-03-30 | 2008-02-08 | Fan and impeller thereof |
Country Status (2)
Country | Link |
---|---|
US (1) | US20080240921A1 (en) |
TW (1) | TWI328080B (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20190390680A1 (en) * | 2018-06-25 | 2019-12-26 | Delta Electronics, Inc. | Fan |
US11365748B2 (en) * | 2018-11-28 | 2022-06-21 | Delta Electronics, Inc. | Fan impeller |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN104214139B (en) * | 2013-05-30 | 2016-12-28 | 台达电子工业股份有限公司 | Fan |
Citations (12)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3513339A (en) * | 1966-12-07 | 1970-05-19 | Rotron Mfg Co | Electric motor construction |
US4909711A (en) * | 1978-02-15 | 1990-03-20 | Papst-Motoren Gmbh & Co. Kg | Small fan with electric drive motor |
US5217351A (en) * | 1989-09-29 | 1993-06-08 | Micronel Ag | Small fan |
TW268994B (en) * | 1994-02-28 | 1996-01-21 | Daewoo Electronics Co Ltd | |
US5988979A (en) * | 1996-06-04 | 1999-11-23 | Honeywell Consumer Products, Inc. | Centrifugal blower wheel with an upwardly extending, smoothly contoured hub |
US6979177B2 (en) * | 2002-12-30 | 2005-12-27 | Delta Electronics, Inc. | Rotor assembly |
US20060039784A1 (en) * | 2004-08-18 | 2006-02-23 | Delta Electronics, Inc. | Heat dissipation fans and housings therefor |
US7052236B2 (en) * | 2003-05-30 | 2006-05-30 | Delta Electronics, Inc. | Heat-dissipating device and housing thereof |
US7275911B2 (en) * | 2004-08-27 | 2007-10-02 | Delta Electronics Inc. | Heat-dissipating fan and its housing |
US20080219837A1 (en) * | 2007-03-06 | 2008-09-11 | Shun-Chen Chang | Fan and fan frame thereof |
US7447019B2 (en) * | 2005-10-31 | 2008-11-04 | Hewlett-Packard Development Company, L.P. | Computer having an axial duct fan |
US20090226312A1 (en) * | 2008-03-07 | 2009-09-10 | Delta Electonics, Inc. | Fan and fan frame thereof |
-
2007
- 2007-03-30 TW TW096111219A patent/TWI328080B/en not_active IP Right Cessation
-
2008
- 2008-02-08 US US12/028,648 patent/US20080240921A1/en not_active Abandoned
Patent Citations (12)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3513339A (en) * | 1966-12-07 | 1970-05-19 | Rotron Mfg Co | Electric motor construction |
US4909711A (en) * | 1978-02-15 | 1990-03-20 | Papst-Motoren Gmbh & Co. Kg | Small fan with electric drive motor |
US5217351A (en) * | 1989-09-29 | 1993-06-08 | Micronel Ag | Small fan |
TW268994B (en) * | 1994-02-28 | 1996-01-21 | Daewoo Electronics Co Ltd | |
US5988979A (en) * | 1996-06-04 | 1999-11-23 | Honeywell Consumer Products, Inc. | Centrifugal blower wheel with an upwardly extending, smoothly contoured hub |
US6979177B2 (en) * | 2002-12-30 | 2005-12-27 | Delta Electronics, Inc. | Rotor assembly |
US7052236B2 (en) * | 2003-05-30 | 2006-05-30 | Delta Electronics, Inc. | Heat-dissipating device and housing thereof |
US20060039784A1 (en) * | 2004-08-18 | 2006-02-23 | Delta Electronics, Inc. | Heat dissipation fans and housings therefor |
US7275911B2 (en) * | 2004-08-27 | 2007-10-02 | Delta Electronics Inc. | Heat-dissipating fan and its housing |
US7447019B2 (en) * | 2005-10-31 | 2008-11-04 | Hewlett-Packard Development Company, L.P. | Computer having an axial duct fan |
US20080219837A1 (en) * | 2007-03-06 | 2008-09-11 | Shun-Chen Chang | Fan and fan frame thereof |
US20090226312A1 (en) * | 2008-03-07 | 2009-09-10 | Delta Electonics, Inc. | Fan and fan frame thereof |
Non-Patent Citations (1)
Title |
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Tung et al., Cooling Fan, 12/21/2006, Abstract of TWI268994 * |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20190390680A1 (en) * | 2018-06-25 | 2019-12-26 | Delta Electronics, Inc. | Fan |
US11365748B2 (en) * | 2018-11-28 | 2022-06-21 | Delta Electronics, Inc. | Fan impeller |
US11649832B2 (en) | 2018-11-28 | 2023-05-16 | Delta Electronics, Inc. | Fan impeller |
Also Published As
Publication number | Publication date |
---|---|
TWI328080B (en) | 2010-08-01 |
TW200839100A (en) | 2008-10-01 |
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Legal Events
Date | Code | Title | Description |
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AS | Assignment |
Owner name: DELTA ELECTRONICS, INC., TAIWAN Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:CHANG, SHUN-CHEN;HSU, SHUO-SHIU;REEL/FRAME:020695/0015 Effective date: 20071212 |
|
STCB | Information on status: application discontinuation |
Free format text: ABANDONED -- FAILURE TO RESPOND TO AN OFFICE ACTION |