US20220025901A1 - Fan frame structure - Google Patents
Fan frame structure Download PDFInfo
- Publication number
- US20220025901A1 US20220025901A1 US16/939,063 US202016939063A US2022025901A1 US 20220025901 A1 US20220025901 A1 US 20220025901A1 US 202016939063 A US202016939063 A US 202016939063A US 2022025901 A1 US2022025901 A1 US 2022025901A1
- Authority
- US
- United States
- Prior art keywords
- frame structure
- fan
- fan frame
- flow passage
- notches
- 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
- 238000001816 cooling Methods 0.000 description 3
- 230000017525 heat dissipation Effects 0.000 description 3
- 230000000694 effects Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
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
- 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
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- 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
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D19/00—Axial-flow pumps
- F04D19/002—Axial flow fans
-
- 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
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- 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
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/66—Combating cavitation, whirls, noise, vibration or the like; Balancing
- F04D29/68—Combating cavitation, whirls, noise, vibration or the like; Balancing by influencing boundary layers
- F04D29/681—Combating cavitation, whirls, noise, vibration or the like; Balancing by influencing boundary layers especially adapted for elastic fluid pumps
Definitions
- a primary object of the present invention is to effectively solve the problems in the conventional fan by providing a fan frame structure that can largely reduce the noise produced when the fan operates.
- the notches provided on the outlet edge allow the turbulent airflows at the outlet opening to contact with air outside the frame sooner. In this way, the noise produced when the fan operates can be reduced, and the vibration of the fan produced during its operation can also be largely reduced.
- FIG. 1 is a bottom perspective view of a fan frame structure according to a first embodiment of the present invention
- FIG. 3 is a bottom perspective view of a fan frame structure according to a second embodiment of the present invention.
- FIG. 4 is a bottom perspective view of a fan frame structure according to a third embodiment of the present invention.
- FIG. 5 is a bottom perspective view of a fan frame structure according to a fourth embodiment of the present invention.
- FIGS. 1 and 2 are bottom and top perspective views, respectively, of a fan frame structure 2 according to a first embodiment of the present invention.
- the fan frame structure 2 in the first embodiment includes a frame 27 having a bottom surface 20 , a top surface 21 , a flow passage 22 and an inner sidewall surface 23 .
- the flow passage 22 is located between the bottom surface 20 and the top surface 21 , and faces toward the inner sidewall surface 23 .
- the bottom surface 20 and the top surface 21 are provided with an outlet opening 24 and an inlet opening 25 , respectively, and the inlet and the outlet opening 24 , 25 are communicable with the flow passage 22 .
- each of the notches 3 are cut on the outlet edge 240 in a direction perpendicular to the outlet edge 240 . That is, a junction of each notch 3 and the outlet edge 240 forms a right angle of 90°.
- the quantity and the size of the notches 3 are also adjustable according to the user's requirements.
- the notches 3 provided on the outlet edge 240 allow the turbulent airflows at the outlet opening 24 to contact with air outside the frame 27 sooner. In this way, the noise produced when the fan operates can be reduced, and the vibration of the fan produced during its operation can also be largely reduced.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
Abstract
Description
- The present invention relates to a fan frame structure, and more particularly, to a fan frame structure capable of largely reducing the noise produced during fan operation.
- Following the quick development of high performance, high frequency, high running speed and compact electronic products, the amount of heat produced by the electronic products is constantly increased, which tends to cause unstable operational state of the electronic products and thus affect the reliability and the service life thereof. Therefore, heat dissipation has become an important issue among the electronic products. To effectively dissipate the heat produced by the electronic products, a conventional way is forced heat dissipation by cooling airflows produced by a fan.
- The principle of producing cooling airflows by fan is mostly related to the wing-shaped design of blades on a rotor of the fan. The rotor is driven by a motor and a circuit board to rotate at a nominal speed. When the wing-shaped blades are driven to rotate, work is done through the camber of the wing-shaped blades that produces a push force and accordingly, produces cooling airflows. Meanwhile, when the rotor rotates, the frame of the fan often produces undesired fundamental frequency vibration to cause additional noise. And, with the increasingly rigorous demands for heat dissipation by servers and other network communication equipment, the conventional fan with general rotational speed is no longer competent for use. Therefore, it is necessary to further enhance the fan rotational speed. In addition, the problem of high noise that comes from the entire fan and is caused by the turbulent airflows at the fan outlet also needs to be solved urgently.
- According to the above description, the conventional fan has the disadvantages of (1) producing high noise when the fan operates at a high rotational speed; and (2) producing severe vibration when the fan operates.
- A primary object of the present invention is to effectively solve the problems in the conventional fan by providing a fan frame structure that can largely reduce the noise produced when the fan operates.
- Another object of the present invention is to provide a fan frame structure that can largely reduce the vibration produced when the fan operates.
- To achieve the above and other objects, the fan frame structure according to the present invention includes a frame having a bottom surface, a top surface and a flow passage. The flow passage is located between the bottom surface and the top surface, and the bottom surface and the top surface are provided with an outlet opening and an inlet opening, respectively, which are communicable with the flow passage. The outlet opening has an outlet edge, on and along which a plurality of notches communicable with the flow passage is cut.
- With the fan frame structure of the present invention, when airflows are discharged via the outlet opening to an environment outside the frame, the notches provided on the outlet edge allow the turbulent airflows at the outlet opening to contact with air outside the frame sooner. In this way, the noise produced when the fan operates can be reduced, and the vibration of the fan produced during its operation can also be largely reduced.
- The structure and the technical means adopted by the present invention to achieve the above and other objects can be best understood by referring to the following detailed description of the preferred embodiments and the accompanying drawings, wherein
-
FIG. 1 is a bottom perspective view of a fan frame structure according to a first embodiment of the present invention; -
FIG. 2 is a top perspective view of the fan frame structure ofFIG. 1 ; -
FIG. 3 is a bottom perspective view of a fan frame structure according to a second embodiment of the present invention; -
FIG. 4 is a bottom perspective view of a fan frame structure according to a third embodiment of the present invention; -
FIG. 5 is a bottom perspective view of a fan frame structure according to a fourth embodiment of the present invention; and -
FIG. 6 is a bottom perspective view of a fan frame structure according to a fifth embodiment of the present invention. - The present invention will now be described with some preferred embodiments thereof and by referring to the accompanying drawings. For the purpose of easy to understand, elements that are the same in the preferred embodiments are denoted by the same reference numerals.
- Please refer to
FIGS. 1 and 2 , which are bottom and top perspective views, respectively, of afan frame structure 2 according to a first embodiment of the present invention. As shown, thefan frame structure 2 in the first embodiment includes aframe 27 having abottom surface 20, atop surface 21, aflow passage 22 and aninner sidewall surface 23. Theflow passage 22 is located between thebottom surface 20 and thetop surface 21, and faces toward theinner sidewall surface 23. Thebottom surface 20 and thetop surface 21 are provided with an outlet opening 24 and an inlet opening 25, respectively, and the inlet and the outlet opening 24, 25 are communicable with theflow passage 22. - In the
flow passage 22 of theframe 27, afan wheel 5 is correspondingly arranged. Since thefan wheel 5 has a structural configuration similar to that of conventional fan wheels, i.e. has a hub and a plurality of radially outward extended blades, it is not repeatedly described herein. - In addition, the
fan frame structure 2 further includes abase 4, which is supported at the outlet opening 24 and connected to theframe 27 by a plurality of connectingmembers 40. In the first embodiment of the present invention, the connectingmembers 40 are illustrated as a plurality of ribs. However, it is understood the connectingmembers 40 are not necessarily limited to the form of ribs, but can be, for example, stationary blades or other equivalents. - The outlet opening 24 of the
frame 27 has anoutlet edge 240, which is a surface bent at an angle. In other words, theoutlet edge 240 is a joint of thebottom surface 20 and theinner sidewall surface 23 of theframe 27. On and along theoutlet edge 240, a plurality ofnotches 3 communicable with theflow passage 22 is cut. In the illustrated first embodiment, the notches are equally spaced along theoutlet edge 240, i.e. the joint of thebottom surface 20 and theinner sidewall surface 23 of theframe 27. However, in other operable embodiments, for example the second embodiment of the present invention shown inFIG. 3 , thenotches 3 can be otherwise unequally spaced along theoutlet edge 240. Further, in the illustrated first embodiment, each of thenotches 3 are cut on theoutlet edge 240 in a direction perpendicular to theoutlet edge 240. That is, a junction of eachnotch 3 and theoutlet edge 240 forms a right angle of 90°. However, in a third embodiment of the present invention as shown inFIG. 4 , there arenotches 3 cut on theoutlet edge 240 in a direction not perpendicular to theoutlet edge 240. That is, the junction of eachnotch 3 and theoutlet edge 240 forms an included angle other than 90°. Moreover, the quantity and the size of thenotches 3 are also adjustable according to the user's requirements. - Please refer to
FIG. 5 , which is a bottom perspective view of a fan frame structure according to a fourth embodiment of the present invention. In the fourth embodiment, theoutlet edge 240 is aslant surface 26. That is, theslant surface 26 is formed at the joint of theinner sidewall surface 23 and thebottom surface 20 of theframe 27, and thenotches 3 are cut on theslant surface 26. In the illustrated fourth embodiment, thenotches 3 are long grooves in shape. In a fifth embodiment as shown inFIG. 6 , thenotches 3 can be isosceles triangles, equilateral triangles or isosceles trapezoids in shape. In other words, thenotches 3 are changeable in shape according to the user's requirements to similarly achieve the effect of the present invention. - With the fan frame structure of the present invention, when airflows are discharged via the outlet opening 24 to an environment outside the
frame 27, thenotches 3 provided on theoutlet edge 240 allow the turbulent airflows at the outlet opening 24 to contact with air outside theframe 27 sooner. In this way, the noise produced when the fan operates can be reduced, and the vibration of the fan produced during its operation can also be largely reduced. - Therefore, compared to the conventional fan frames, the fan frame structure of the present invention has the following advantages: (1) capable of largely reducing the noise produced when the fan operates at a high rotational speed; and (2) capable of largely reducing the vibration produced when the fan operates.
- The present invention has been described with some preferred embodiments thereof and it is understood that many changes and modifications in the described embodiments can be carried out without departing from the scope and the spirit of the invention that is intended to be limited only by the appended claims.
Claims (10)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US16/939,063 US20220025901A1 (en) | 2020-07-27 | 2020-07-27 | Fan frame structure |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US16/939,063 US20220025901A1 (en) | 2020-07-27 | 2020-07-27 | Fan frame structure |
Publications (1)
Publication Number | Publication Date |
---|---|
US20220025901A1 true US20220025901A1 (en) | 2022-01-27 |
Family
ID=79687979
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US16/939,063 Abandoned US20220025901A1 (en) | 2020-07-27 | 2020-07-27 | Fan frame structure |
Country Status (1)
Country | Link |
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US (1) | US20220025901A1 (en) |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE202010013785U1 (en) * | 2009-10-03 | 2011-02-17 | Ebm-Papst St. Georgen Gmbh & Co. Kg | Diagonal fan |
-
2020
- 2020-07-27 US US16/939,063 patent/US20220025901A1/en not_active Abandoned
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE202010013785U1 (en) * | 2009-10-03 | 2011-02-17 | Ebm-Papst St. Georgen Gmbh & Co. Kg | Diagonal fan |
Non-Patent Citations (1)
Title |
---|
DE-202010013785 - Translation from Espacenet (Year: 2020) * |
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Owner name: ASIA VITAL COMPONENTS (SHEN ZHEN) CO., LTD., CHINA Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:SUN, SUNG-WEI;CHOU, CHU-HSIEN;LIN, YI-CHIH;AND OTHERS;SIGNING DATES FROM 20200703 TO 20200706;REEL/FRAME:053312/0869 |
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