US20200166040A1 - Axial fan and electrical device - Google Patents
Axial fan and electrical device Download PDFInfo
- Publication number
- US20200166040A1 US20200166040A1 US16/695,085 US201916695085A US2020166040A1 US 20200166040 A1 US20200166040 A1 US 20200166040A1 US 201916695085 A US201916695085 A US 201916695085A US 2020166040 A1 US2020166040 A1 US 2020166040A1
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- US
- United States
- Prior art keywords
- center
- axial fan
- axial
- cylindrical portion
- radial
- 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
- 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
- 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
-
- 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
- F04D29/40—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
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
- F05D—INDEXING SCHEME FOR ASPECTS RELATING TO NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, GAS-TURBINES OR JET-PROPULSION PLANTS
- F05D2250/00—Geometry
- F05D2250/50—Inlet or outlet
- F05D2250/51—Inlet
Definitions
- the disclosure relates to the measurement field, and in particular, to an axial fan.
- a cooling fan is mounted in the housing of various electrical products to cool the electronic components of the electrical product. Because heat generated by the electronic components increases as the performance improves, and the layout density increases as the size of the housing decreases, static pressure and flow of the cooling fan need to be increased. In order to meet this requirement, in recent years, an axial fan has been used as a cooling fan to ensure a large static pressure and an increased flow.
- the air flow inside the electrical device may be impeded due to the arrangement of other components of the electrical device. As a result, fluidity of air on a side of the electrical device is relatively poor.
- an axial fan includes: a motor having a shaft that can rotate about a central axis; an impeller fixed to the shaft; and a housing having a cylindrical portion disposed on a radial outer side of the impeller and extending in an axial direction, wherein a center of an axial projection of a radial inner surface of the cylindrical portion is a first center, the first center being located on the central axis; and a center of an axial projection of a radial outer surface of the cylindrical portion is a second center, the second center being at a position different from a position of the first center in a direction perpendicular to the central axis.
- FIG. 1 is a cross-sectional view of an axial fan according to an embodiment of the disclosure.
- FIG. 2 is a bottom view of an axial fan according to Embodiment 1 of the disclosure.
- FIG. 3 is a perspective view of the axial fan according to Embodiment 1 of the disclosure.
- FIG. 4 is a schematic diagram of a relative position of an internal structure of an electrical device according to Embodiment 2 of the disclosure.
- a direction parallel to a central axis is referred to as an “axial direction”
- a radial direction that is centered on the central axis is referred to as a “radial direction”
- a direction around the central axis is referred to as a “circumferential direction”.
- the above is merely for convenience of description and is not intended to limit the orientation of the axial fan during use and manufacture.
- FIG. 1 is a cross-sectional view of an axial fan according to an embodiment of the disclosure.
- FIG. 2 is a bottom view of an axial fan according to Embodiment 1 of the disclosure.
- FIG. 3 is a perspective view of the axial fan according to Embodiment 1 of the disclosure.
- the axial fan 10 includes: a motor 100 having a shaft 110 that can rotate about a central axis OO′; an impeller 200 fixed to the shaft 110 ; and a housing 300 having a cylindrical portion 310 disposed on a radial outer side of the impeller 200 and extending in the axial direction.
- a center of an axial projection of a radial inner surface 311 of the cylindrical portion 310 is a first center C 1 , and the first center is located on the central axis OO′.
- a center of an axial projection of a radial outer surface 312 of the cylindrical portion 310 is a second center C 2 , and the second center C 2 is at a position different from the position of the first center C 1 in a direction perpendicular to the central axis OO′.
- the first center C 1 is located on the central axis OO′
- the second center is located on an axis AA′ of the radial outer surface 312 of the cylindrical portion 310
- the axis AA′ is deviated relative to the central axis OO′ in a direction perpendicular to the axial direction.
- a direction of a relative offset between the first center C 1 and the second center C 2 and the offset may be set according to the actual requirement.
- the first center C 1 of the radial inner surface 311 and the second center C 2 of the radial outer surface 312 are disposed at different positions, so that a component that impedes flowing of air in the electrical device can be avoided to some extent, thereby improving air supply efficiency.
- the axial fan 10 may further include some other existing components. The descriptions thereof are omitted herein.
- a radial width of a first region 313 of the cylindrical portion 310 that is disposed on the side of the second center C 2 (the left side in FIG. 2 ) based on the first center C 1 is greater than a radial width of a second region 314 of the cylindrical portion 310 that is disposed on the opposite side of the second center C 2 based on the first center C 1 . That is, the left side portion of the cylindrical portion 310 in FIG. 2 is thicker, and the right side portion is thinner.
- a housing recess 315 that is recessed in the axial direction is formed in the first region 313 .
- the weight of the housing can be reduced and shrinkage generated during molding can be prevented.
- a plurality of housing recesses 315 are formed in the circumferential direction.
- the quantity and the size of the housing recess 315 may be set according to the actual requirement.
- a first rib 316 is disposed between the plurality of housing recesses 315 . In this way, the rigidity of the housing can be improved.
- the housing 300 may further include: a base 320 that overlaps with the motor 100 in the axial direction; and a second rib 330 connecting the base 320 and the radial inner surface 311 of the cylindrical portion 310 , wherein the second rib 330 is at a position different from the position of the housing recess 315 in the circumferential direction.
- a plurality of second ribs 330 may be disposed in the circumferential direction, and the quantity of second ribs 330 may be determined according to the actual requirement.
- the radial inner surface 311 of the first region 313 of the cylindrical portion 310 may be designed to incline in a direction away from the central axis OO′ in a direction toward an air outlet of the axial fan 10 (an upward direction in FIG. 1 ). In this way, an airflow from an upper surface of the axial fan can be aggregated from the first center C 1 to the second center C 2 , thereby reducing exhaust resistance.
- the housing 300 may further include: an edge portion 320 extending to the radial outer side from an end (an upper end in FIG. 1 ) of the cylindrical portion 310 that is close to the air outlet of the axial fan 10 in the axial direction, wherein a center of an axial projection of the edge portion 320 is the second center C 2 .
- an edge portion 320 extending to the radial outer side from an end (an upper end in FIG. 1 ) of the cylindrical portion 310 that is close to the air outlet of the axial fan 10 in the axial direction, wherein a center of an axial projection of the edge portion 320 is the second center C 2 .
- the cylindrical portion 310 may include a cylindrical inner wall extending in the axial direction, and a cylindrical outer wall disposed on a radial outer side of the inner wall and extending in the axial direction.
- the inner wall includes the radial inner surface 311
- the outer wall includes the radial outer surface 312
- the inner wall and the outer wall may be connected by a third rib (not shown) extending in the radial direction. In this way, the rigidity of the housing can be improved while reducing the weight of the housing.
- the center of the radial inner surface and the center of the radial outer surface of the cylindrical portion of the housing of the axial fan are disposed at different positions, so that the component that impedes flowing of air in the electrical device can be avoided to some extent, thereby improving air supply efficiency.
- the present embodiment provides an electrical device, and the electrical device includes the axial fan described in Embodiment 1.
- the electrical device includes the axial fan described in Embodiment 1.
- a specific structure of the axial fan is described in Embodiment 1.
- Content of the axial fan is incorporated herein, and the descriptions thereof are omitted herein.
- FIG. 4 is a schematic diagram of a relative position of an internal structure of the electrical device according to Embodiment 2 of the disclosure. As shown in FIG. 4 , the electrical device 20 includes the axial fan 10 and another component 30 , and the another component 30 is located on the right side below the axial fan 10 .
- the another component 30 impedes flowing of air on the right side, and as the center C 1 of the radial inner surface of the cylindrical portion 310 of the axial fan 10 is configured to be deviated to the left side relative to the center of the electrical device, the another component 30 can be avoided to some extent, thereby improving air supply efficiency.
- the electrical device may be any electrical device that uses an axial fan.
- the electrical device may be a computer, acoustic equipment, a projector, a communication device, a power supply, an air purifier, or a medical device that uses an axial fan.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
Abstract
Embodiments of the disclosure provide an axial fan and an electrical device. A center of a radial inner surface and a center of a radial outer surface of a cylindrical portion of a housing of the axial fan are disposed at different positions.
Description
- The present invention claims priority under 35 U.S.C. § 119 to Chinese Application No. 201821979346.0 filed on Nov. 28, 2018 the entire content of which is incorporated herein by reference.
- The disclosure relates to the measurement field, and in particular, to an axial fan.
- In the conventional art, a cooling fan is mounted in the housing of various electrical products to cool the electronic components of the electrical product. Because heat generated by the electronic components increases as the performance improves, and the layout density increases as the size of the housing decreases, static pressure and flow of the cooling fan need to be increased. In order to meet this requirement, in recent years, an axial fan has been used as a cooling fan to ensure a large static pressure and an increased flow.
- It should be noted that, the above introduction of the technical background is only for the purpose of facilitating a clear and complete description of the technical solutions of the disclosure and facilitating the understanding by those skilled in the art. The above technical solutions are not considered to be well known to those skilled in the art simply because these solutions are described in the background section of the disclosure.
- When the foregoing existing axial fan is mounted to an actual electrical device, the air flow inside the electrical device may be impeded due to the arrangement of other components of the electrical device. As a result, fluidity of air on a side of the electrical device is relatively poor.
- According to an embodiment of the disclosure, an axial fan is provided, and the axial fan includes: a motor having a shaft that can rotate about a central axis; an impeller fixed to the shaft; and a housing having a cylindrical portion disposed on a radial outer side of the impeller and extending in an axial direction, wherein a center of an axial projection of a radial inner surface of the cylindrical portion is a first center, the first center being located on the central axis; and a center of an axial projection of a radial outer surface of the cylindrical portion is a second center, the second center being at a position different from a position of the first center in a direction perpendicular to the central axis.
- The above and other elements, features, steps, characteristics and advantages of the present disclosure will become more apparent from the following detailed description of the preferred embodiments with reference to the attached drawings.
-
FIG. 1 is a cross-sectional view of an axial fan according to an embodiment of the disclosure. -
FIG. 2 is a bottom view of an axial fan according to Embodiment 1 of the disclosure. -
FIG. 3 is a perspective view of the axial fan according to Embodiment 1 of the disclosure. -
FIG. 4 is a schematic diagram of a relative position of an internal structure of an electrical device according to Embodiment 2 of the disclosure. - The foregoing and other features of the disclosure will become apparent from the following specification with reference to the accompanying drawings. Specific implementations of the disclosure are disclosed in the specification and the accompanying drawings, which illustrate some implementations in which the principles of the disclosure may be adopted. It should be understood that, the disclosure is not limited to the implementations described, and conversely, the disclosure includes all modifications, variations and equivalents that fall within the scope of the appended claims.
- In the embodiments of the disclosure, for convenience of description, a direction parallel to a central axis is referred to as an “axial direction”, a radial direction that is centered on the central axis is referred to as a “radial direction”, and a direction around the central axis is referred to as a “circumferential direction”. However, the above is merely for convenience of description and is not intended to limit the orientation of the axial fan during use and manufacture.
- The following describes the axial fan in the embodiments of the disclosure with reference to the accompanying drawings.
-
FIG. 1 is a cross-sectional view of an axial fan according to an embodiment of the disclosure.FIG. 2 is a bottom view of an axial fan according to Embodiment 1 of the disclosure.FIG. 3 is a perspective view of the axial fan according to Embodiment 1 of the disclosure. - As shown in
FIG. 1 andFIG. 2 , theaxial fan 10 includes: amotor 100 having ashaft 110 that can rotate about a central axis OO′; animpeller 200 fixed to theshaft 110; and ahousing 300 having acylindrical portion 310 disposed on a radial outer side of theimpeller 200 and extending in the axial direction. A center of an axial projection of a radialinner surface 311 of thecylindrical portion 310 is a first center C1, and the first center is located on the central axis OO′. A center of an axial projection of a radialouter surface 312 of thecylindrical portion 310 is a second center C2, and the second center C2 is at a position different from the position of the first center C1 in a direction perpendicular to the central axis OO′. - In the present embodiment, the first center C1 is located on the central axis OO′, the second center is located on an axis AA′ of the radial
outer surface 312 of thecylindrical portion 310, and the axis AA′ is deviated relative to the central axis OO′ in a direction perpendicular to the axial direction. - In the present embodiment, a direction of a relative offset between the first center C1 and the second center C2 and the offset may be set according to the actual requirement.
- In this way, the first center C1 of the radial
inner surface 311 and the second center C2 of the radialouter surface 312 are disposed at different positions, so that a component that impedes flowing of air in the electrical device can be avoided to some extent, thereby improving air supply efficiency. - In the present embodiment, for the structures of the
motor 100 and theimpeller 200, please refer to the related art. In addition, theaxial fan 10 may further include some other existing components. The descriptions thereof are omitted herein. - In the present embodiment, as shown in
FIG. 2 , in the direction perpendicular to the central axis OO′, a radial width of afirst region 313 of thecylindrical portion 310 that is disposed on the side of the second center C2 (the left side inFIG. 2 ) based on the first center C1 is greater than a radial width of asecond region 314 of thecylindrical portion 310 that is disposed on the opposite side of the second center C2 based on the first center C1. That is, the left side portion of thecylindrical portion 310 inFIG. 2 is thicker, and the right side portion is thinner. In addition, a housing recess 315 that is recessed in the axial direction is formed in thefirst region 313. - In this way, the weight of the housing can be reduced and shrinkage generated during molding can be prevented.
- As shown in
FIG. 2 , a plurality ofhousing recesses 315 are formed in the circumferential direction. The quantity and the size of thehousing recess 315 may be set according to the actual requirement. - In the present embodiment, as shown in
FIG. 2 , afirst rib 316 is disposed between the plurality ofhousing recesses 315. In this way, the rigidity of the housing can be improved. - In the present embodiment, as shown in
FIG. 2 , thehousing 300 may further include: abase 320 that overlaps with themotor 100 in the axial direction; and asecond rib 330 connecting thebase 320 and the radialinner surface 311 of thecylindrical portion 310, wherein thesecond rib 330 is at a position different from the position of the housing recess 315 in the circumferential direction. - In this way, the rigidity of the housing can be improved.
- As shown in
FIG. 2 , a plurality ofsecond ribs 330 may be disposed in the circumferential direction, and the quantity ofsecond ribs 330 may be determined according to the actual requirement. - In the present embodiment, the radial
inner surface 311 of thefirst region 313 of thecylindrical portion 310 may be designed to incline in a direction away from the central axis OO′ in a direction toward an air outlet of the axial fan 10 (an upward direction inFIG. 1 ). In this way, an airflow from an upper surface of the axial fan can be aggregated from the first center C1 to the second center C2, thereby reducing exhaust resistance. - In the present embodiment, as shown in
FIG. 3 , thehousing 300 may further include: anedge portion 320 extending to the radial outer side from an end (an upper end inFIG. 1 ) of thecylindrical portion 310 that is close to the air outlet of theaxial fan 10 in the axial direction, wherein a center of an axial projection of theedge portion 320 is the second center C2. In this way, installation precision of the axial fan during installation can be improved. - In addition, the
cylindrical portion 310 may include a cylindrical inner wall extending in the axial direction, and a cylindrical outer wall disposed on a radial outer side of the inner wall and extending in the axial direction. The inner wall includes the radialinner surface 311, and the outer wall includes the radialouter surface 312, and the inner wall and the outer wall may be connected by a third rib (not shown) extending in the radial direction. In this way, the rigidity of the housing can be improved while reducing the weight of the housing. - It can be known from the foregoing embodiment that, the center of the radial inner surface and the center of the radial outer surface of the cylindrical portion of the housing of the axial fan are disposed at different positions, so that the component that impedes flowing of air in the electrical device can be avoided to some extent, thereby improving air supply efficiency.
- The present embodiment provides an electrical device, and the electrical device includes the axial fan described in Embodiment 1. A specific structure of the axial fan is described in Embodiment 1. Content of the axial fan is incorporated herein, and the descriptions thereof are omitted herein.
-
FIG. 4 is a schematic diagram of a relative position of an internal structure of the electrical device according to Embodiment 2 of the disclosure. As shown inFIG. 4 , theelectrical device 20 includes theaxial fan 10 and anothercomponent 30, and theanother component 30 is located on the right side below theaxial fan 10. - As shown in
FIG. 4 , theanother component 30 impedes flowing of air on the right side, and as the center C1 of the radial inner surface of thecylindrical portion 310 of theaxial fan 10 is configured to be deviated to the left side relative to the center of the electrical device, theanother component 30 can be avoided to some extent, thereby improving air supply efficiency. - In the present embodiment, the electrical device may be any electrical device that uses an axial fan. For example, the electrical device may be a computer, acoustic equipment, a projector, a communication device, a power supply, an air purifier, or a medical device that uses an axial fan.
- Features of the above-described preferred embodiments and the modifications thereof may be combined appropriately as long as no conflict arises. While preferred embodiments of the present disclosure have been described above, it is to be understood that variations and modifications will be apparent to those skilled in the art without departing from the scope and spirit of the present disclosure. The scope of the present disclosure, therefore, is to be determined solely by the following claims.
Claims (9)
1. An axial fan, comprising:
a motor comprising a shaft rotatable about a central axis;
an impeller fixed to the shaft; and
a housing comprising a cylindrical portion disposed on a radial outer side of the impeller and extending in an axial direction,
wherein
a center of an axial projection of a radial inner surface of the cylindrical portion is a first center, the first center being located on the central axis, and
a center of an axial projection of a radial outer surface of the cylindrical portion is a second center, the second center being at a position different from a position of the first center in a direction perpendicular to the central axis.
2. The axial fan according to claim 1 , wherein
in the direction perpendicular to the central axis, a radial width of a first region of the cylindrical portion that is disposed on a second center side based on the first center is greater than a radial width of a second region of the cylindrical portion that is disposed on an opposite side of the second center based on the first center, and
a housing recess that is recessed in the axial direction is formed in the first region.
3. The axial fan according to claim 2 , wherein
a plurality of housing recesses are formed in a circumferential direction.
4. The axial fan according to claim 3 , wherein
a first rib is disposed between the plurality of housing recesses.
5. The axial fan according to claim 2 , wherein
the housing further comprises:
a base that overlaps with the motor in the axial direction; and
a second rib connecting the base and the radial inner surface of the cylindrical portion, wherein
the second rib and the housing recess are provided at different positions in a circumferential direction.
6. The axial fan according to claim 2 , wherein
in a direction toward an air outlet of the axial fan, the radial inner surface of the first region of the cylindrical portion inclines in a direction away from the central axis.
7. The axial fan according to claim 1 , wherein
the cylindrical portion comprises a cylindrical inner wall extending in the axial direction, and a cylindrical outer wall that is disposed on a radial outer side of the inner wall and extends in the axial direction,
the inner wall comprises the radial inner surface, and the outer wall comprises the radial outer surface, and
the inner wall and the outer wall are connected by a third rib extending in a radial direction.
8. The axial fan according to claim 1 , wherein
the housing further comprises:
an edge portion extending to the radial outer side from an end of the cylindrical portion that is close to an air outlet of the axial fan in the axial direction, and
a center of an axial projection of the edge portion is the second center.
9. An electrical device, comprising the axial fan according to claim 1 .
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN201821979346.0 | 2018-11-28 | ||
CN201821979346.0U CN209195777U (en) | 2018-11-28 | 2018-11-28 | Aerofoil fan and electrical equipment |
Publications (1)
Publication Number | Publication Date |
---|---|
US20200166040A1 true US20200166040A1 (en) | 2020-05-28 |
Family
ID=67426616
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US16/695,085 Abandoned US20200166040A1 (en) | 2018-11-28 | 2019-11-25 | Axial fan and electrical device |
Country Status (2)
Country | Link |
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US (1) | US20200166040A1 (en) |
CN (1) | CN209195777U (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
USD944387S1 (en) * | 2019-03-26 | 2022-02-22 | Ebm-Papst St. Georgen Gmbh & Co. Kg | Ventilating fan |
USD972120S1 (en) * | 2019-12-03 | 2022-12-06 | Ebm-Papst Mulfingen Gmbh & Co. Kg | Ventilation unit |
-
2018
- 2018-11-28 CN CN201821979346.0U patent/CN209195777U/en not_active Expired - Fee Related
-
2019
- 2019-11-25 US US16/695,085 patent/US20200166040A1/en not_active Abandoned
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
USD944387S1 (en) * | 2019-03-26 | 2022-02-22 | Ebm-Papst St. Georgen Gmbh & Co. Kg | Ventilating fan |
USD972120S1 (en) * | 2019-12-03 | 2022-12-06 | Ebm-Papst Mulfingen Gmbh & Co. Kg | Ventilation unit |
Also Published As
Publication number | Publication date |
---|---|
CN209195777U (en) | 2019-08-02 |
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