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US20030091435A1 - Housing structure of a fan - Google Patents

Housing structure of a fan Download PDF

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Publication number
US20030091435A1
US20030091435A1 US09/987,307 US98730701A US2003091435A1 US 20030091435 A1 US20030091435 A1 US 20030091435A1 US 98730701 A US98730701 A US 98730701A US 2003091435 A1 US2003091435 A1 US 2003091435A1
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US
United States
Prior art keywords
face
fan
support bars
air
housing
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.)
Granted
Application number
US09/987,307
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US6561762B1 (en
Inventor
Alex Horng
Ching-Shen Hong
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Sunonwealth Electric Machine Industry Co Ltd
Original Assignee
Sunonwealth Electric Machine Industry Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Sunonwealth Electric Machine Industry Co Ltd filed Critical Sunonwealth Electric Machine Industry Co Ltd
Priority to US09/987,307 priority Critical patent/US6561762B1/en
Assigned to SUNONWEALTH ELECTRIC MACHINE INDUSTRY CO., LTD. reassignment SUNONWEALTH ELECTRIC MACHINE INDUSTRY CO., LTD. ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: HONG, CHING-SHEN, HORNG, ALEX
Priority to DE20214973U priority patent/DE20214973U1/en
Application granted granted Critical
Publication of US6561762B1 publication Critical patent/US6561762B1/en
Publication of US20030091435A1 publication Critical patent/US20030091435A1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D25/00—Pumping installations or systems
    • F04D25/02—Units comprising pumps and their driving means
    • F04D25/06—Units comprising pumps and their driving means the pump being electrically driven
    • F04D25/0606—Units comprising pumps and their driving means the pump being electrically driven the electric motor being specially adapted for integration in the pump
    • F04D25/0613—Units comprising pumps and their driving means the pump being electrically driven the electric motor being specially adapted for integration in the pump the electric motor being of the inside-out type, i.e. the rotor is arranged radially outside a central stator
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D29/00—Details, component parts, or accessories
    • F04D29/40—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
    • 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
    • F04D29/661—Combating cavitation, whirls, noise, vibration or the like; Balancing especially adapted for elastic fluid pumps
    • F04D29/667—Combating cavitation, whirls, noise, vibration or the like; Balancing especially adapted for elastic fluid pumps by influencing the flow pattern, e.g. suppression of turbulence

Definitions

  • the present invention relates to a housing structure of a fan, wherein the noise produced during rotation of the fan may be reduced, and rotation of the fan may produce a larger output air pressure at the air outlet.
  • a conventional fan in accordance with the prior art shown in FIGS. 1 - 3 comprises a housing 90 for combination of a stator 91 which includes a bearing 92 having a shaft hole for pivot and rotation of a rotation shaft 94 of an impeller 93 .
  • the impeller 93 When the impeller 93 is rotated, the blades 95 thereof may drive the air flow to move toward the air outlet of the housing 90 .
  • the air outlet of the housing 90 is provided with multiple support rods 96 .
  • the cross-sectional of each of the support rods 96 of the housing 90 has a semi-circular shape as shown in FIG. 2 or a quarter-circular shape as shown in FIG. 3.
  • the air flow driven by the blades 95 of the impeller 93 is hindered by the support rods 96 of the housing 90 , so that the air flow will deflect along the direction as indicated by arrows.
  • the air flow driven by the blades 95 of the impeller 93 is hindered by the support rods 96 of the housing 90 to produce a turbulence, thereby causing noise.
  • the air flow driven by the blades 95 of the impeller 93 is hindered by the support rods 96 of the housing 90 , so that the output air pressure of the air flow driven by the blades 95 of the impeller 93 at the air outlet will be reduced.
  • the primary objective of the present invention is to provide a housing structure of a fan, wherein multiple support bars of the housing of the fan may be improved, so that the noise produced during rotation of the fan may be reduced, and rotation of the fan may produce a larger output air pressure at the air outlet.
  • a housing structure of a fan comprising: a housing including multiple support bars supporting a seat plate with which a stator is combined, an impeller having a rotation shaft rotatably mounted in a shaft hole of the stator, each of the support bars having a first end connected to the housing and a second end connected to the seat plate, a cross-section of each of the support bars having a highest point, and having an air guide face and an air facing face respectively extended from the highest point, and a bottom face connecting the air guide face and the air facing face; the improvement comprising: the air guide face of each of the support bars is formed with a shape of an inclined face, and an acute included angle is formed between the inclined face of the air facing face and a vertical line that is vertical to a horizontal line of a bottom face of the seat plate.
  • FIG. 1 is an exploded perspective view of a conventional fan in accordance with the prior art
  • FIG. 2 is a cross-sectional assembly view of the conventional fan taken along line 2 - 2 as shown in FIG. 1;
  • FIG. 3 is a another cross-sectional assembly view of the conventional fan taken along line 2 - 2 as shown in FIG. 1;
  • FIG. 4 is an exploded perspective view of a housing structure of a fan in accordance with a first embodiment of the present invention
  • FIG. 5 is a top plan view of a housing of the housing structure of a fan as shown in FIG. 4;
  • FIG. 6 is a cross-sectional assembly view of the housing structure of a fan taken along line 6 - 6 as shown in FIG. 5;
  • FIG. 7 is a cross-sectional assembly view of the housing structure of a fan taken along line 7 - 7 as shown in FIG. 5;
  • FIG. 8 is a top plan view of a housing structure of a fan in accordance with a second embodiment of the present invention.
  • a housing structure of a fan in accordance with a preferred embodiment of the present invention comprises a housing 1 including multiple support bars 2 supporting a seat plate 3 with which a stator 4 is combined.
  • An impeller 41 has a rotation shaft 42 rotatably mounted in a shaft hole 40 of the stator 4 .
  • the rotation shaft 42 of the impeller 41 has a center of rotation with a central axis X that is vertical to a horizontal line Y of a bottom face of the seat plate 3 .
  • the support bar 2 may be formed with different thickness according to different requirements, and has a first end connected to the housing 1 and a second end connected to the seat plate 3 .
  • the cross-section of the support bar 2 has an end point P, and has an air guide face 21 and an air facing face 22 extended from the end point P respectively, and a bottom face 23 for connecting the air guide face 21 and the air facing face 22 .
  • the air guide face 21 gradually reduces its height from the end point P, and is connected to the bottom face 23 .
  • the air guide face 21 may be formed with the shape of an inclined face, a circular plane or the like.
  • the air facing face 22 is inclined from the end point P toward the horizontal line Y of the bottom face of the seat plate 3 .
  • An included angle ⁇ is formed between the inclined face of the air facing face 22 and a vertical line X′ that is in parallel with the central axis X.
  • the included angle ⁇ is an acute angle.
  • the included angle ⁇ is ranged between 30° and 70°.
  • the value of noise at one meter spaced from the conventional fan is 31.8 dB, and the value of noise at one meter spaced from the fan of the present invention is 31.6 dB. in addition, the output air pressure of the fan of the present invention may also be increased.
  • the support bar 2 in accordance with a second embodiment of the present invention is shown.
  • the bottom face 23 of at least one of the multiple support bars 2 is formed with a concave groove 24 for mounting electric cords in a sunk manner.
  • the support bars 2 not only decrease the noise of turbulence and increase the output air pressure of the fan, but also protect the electric cords, so that the electric cords will not protrude from the air outlet of the fan, thereby preventing blocking the air output, and so that the housing may have a better outer appearance.
  • the support bar 2 in accordance with another embodiment of the present invention is shown.
  • the support bar 2 may have the above-mentioned air guide face 21 , air facing face 22 , bottom face 23 , and groove 24 , and may also form an air facing arc-shaped bar according to the direction of rotation of the impeller 41 , so that when the air flow driven by the blades of the impeller 41 contacts the arc-shaped support bar 2 , the flow of the air flow is more convenient.
  • the noise of turbulence may be reduced relatively, and the output air pressure of the fan may also be increased.
  • the noise of turbulence produced at the air outlet during rotation of the impeller may be reduced, and the output air pressure of the fan may also be increased.
  • the groove may be used for mounting electric cords in a sunk manner, so that the housing of the fan may have a better outer appearance.

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

Abstract

A housing structure of a fan includes a housing having multiple support bars supporting a seat plate with which a stator is combined. An impeller has a rotation shaft rotatably mounted in the stator. Each of the support bars has two ends respectively connected to the housing and the seat plate. The cross-section of each of the support bars has a highest point, and has an air guide face and an air facing face respectively extended from the highest point, and a bottom face connecting the air guide face and the air facing face. The air guide face of each of the support bars is formed with an inclined face, and an acute included angle is formed between the inclined face and a vertical line that is vertical to a horizontal line of a bottom face of the seat plate.

Description

    BACKGROUND OF THE INVENTION
  • 1. Field of the Invention [0001]
  • The present invention relates to a housing structure of a fan, wherein the noise produced during rotation of the fan may be reduced, and rotation of the fan may produce a larger output air pressure at the air outlet. [0002]
  • 2. Description of the Related Art [0003]
  • A conventional fan in accordance with the prior art shown in FIGS. [0004] 1-3 comprises a housing 90 for combination of a stator 91 which includes a bearing 92 having a shaft hole for pivot and rotation of a rotation shaft 94 of an impeller 93. When the impeller 93 is rotated, the blades 95 thereof may drive the air flow to move toward the air outlet of the housing 90. The air outlet of the housing 90 is provided with multiple support rods 96. The cross-sectional of each of the support rods 96 of the housing 90 has a semi-circular shape as shown in FIG. 2 or a quarter-circular shape as shown in FIG. 3. Thus, the air flow driven by the blades 95 of the impeller 93 is hindered by the support rods 96 of the housing 90, so that the air flow will deflect along the direction as indicated by arrows. Thus, the air flow driven by the blades 95 of the impeller 93 is hindered by the support rods 96 of the housing 90 to produce a turbulence, thereby causing noise. In addition, the air flow driven by the blades 95 of the impeller 93 is hindered by the support rods 96 of the housing 90, so that the output air pressure of the air flow driven by the blades 95 of the impeller 93 at the air outlet will be reduced.
    • SUMMARY OF THE INVENTION
  • The primary objective of the present invention is to provide a housing structure of a fan, wherein multiple support bars of the housing of the fan may be improved, so that the noise produced during rotation of the fan may be reduced, and rotation of the fan may produce a larger output air pressure at the air outlet. [0005]
  • In accordance with the present invention, there is provided a housing structure of a fan, comprising: a housing including multiple support bars supporting a seat plate with which a stator is combined, an impeller having a rotation shaft rotatably mounted in a shaft hole of the stator, each of the support bars having a first end connected to the housing and a second end connected to the seat plate, a cross-section of each of the support bars having a highest point, and having an air guide face and an air facing face respectively extended from the highest point, and a bottom face connecting the air guide face and the air facing face; the improvement comprising: the air guide face of each of the support bars is formed with a shape of an inclined face, and an acute included angle is formed between the inclined face of the air facing face and a vertical line that is vertical to a horizontal line of a bottom face of the seat plate. [0006]
  • Further benefits and advantages of the present invention will become apparent after a careful reading of the detailed description with appropriate reference to the accompanying drawings.[0007]
    • BRIEF DESCRIPTION OF THE DRAWINGS
  • FIG. 1 is an exploded perspective view of a conventional fan in accordance with the prior art; [0008]
  • FIG. 2 is a cross-sectional assembly view of the conventional fan taken along line [0009] 2-2 as shown in FIG. 1;
  • FIG. 3 is a another cross-sectional assembly view of the conventional fan taken along line [0010] 2-2 as shown in FIG. 1;
  • FIG. 4 is an exploded perspective view of a housing structure of a fan in accordance with a first embodiment of the present invention; [0011]
  • FIG. 5 is a top plan view of a housing of the housing structure of a fan as shown in FIG. 4; [0012]
  • FIG. 6 is a cross-sectional assembly view of the housing structure of a fan taken along line [0013] 6-6 as shown in FIG. 5;
  • FIG. 7 is a cross-sectional assembly view of the housing structure of a fan taken along line [0014] 7-7 as shown in FIG. 5; and
  • FIG. 8 is a top plan view of a housing structure of a fan in accordance with a second embodiment of the present invention.[0015]
    • DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS
  • Referring to the drawings and initially to FIG. 4, a housing structure of a fan in accordance with a preferred embodiment of the present invention comprises a [0016] housing 1 including multiple support bars 2 supporting a seat plate 3 with which a stator 4 is combined. An impeller 41 has a rotation shaft 42 rotatably mounted in a shaft hole 40 of the stator 4. The rotation shaft 42 of the impeller 41 has a center of rotation with a central axis X that is vertical to a horizontal line Y of a bottom face of the seat plate 3.
  • Referring to FIG. 6, the [0017] support bar 2 may be formed with different thickness according to different requirements, and has a first end connected to the housing 1 and a second end connected to the seat plate 3. The cross-section of the support bar 2 has an end point P, and has an air guide face 21 and an air facing face 22 extended from the end point P respectively, and a bottom face 23 for connecting the air guide face 21 and the air facing face 22. When the impeller 41 is rotated, the air flow driven by the blades of the impeller 41 will flow along the air guide face 21 and the air facing face 22. The air guide face 21 gradually reduces its height from the end point P, and is connected to the bottom face 23. The air guide face 21 may be formed with the shape of an inclined face, a circular plane or the like. The air facing face 22 is inclined from the end point P toward the horizontal line Y of the bottom face of the seat plate 3. An included angle θ is formed between the inclined face of the air facing face 22 and a vertical line X′ that is in parallel with the central axis X. The included angle θ is an acute angle. Preferably, the included angle θ is ranged between 30° and 70°. Thus, when the air flow driven by the blades of the impeller 41 contacts the air facing face 22, the noise of turbulence may be reduced to the minimum. A test under the same conditions may be performed. The value of noise at one meter spaced from the conventional fan is 31.8 dB, and the value of noise at one meter spaced from the fan of the present invention is 31.6 dB. in addition, the output air pressure of the fan of the present invention may also be increased.
  • Referring to FIG. 7, the [0018] support bar 2 in accordance with a second embodiment of the present invention is shown. The bottom face 23 of at least one of the multiple support bars 2 is formed with a concave groove 24 for mounting electric cords in a sunk manner. Thus, the support bars 2 not only decrease the noise of turbulence and increase the output air pressure of the fan, but also protect the electric cords, so that the electric cords will not protrude from the air outlet of the fan, thereby preventing blocking the air output, and so that the housing may have a better outer appearance.
  • Referring to FIG. 8, the [0019] support bar 2 in accordance with another embodiment of the present invention is shown. The support bar 2 may have the above-mentioned air guide face 21, air facing face 22, bottom face 23, and groove 24, and may also form an air facing arc-shaped bar according to the direction of rotation of the impeller 41, so that when the air flow driven by the blades of the impeller 41 contacts the arc-shaped support bar 2, the flow of the air flow is more convenient. Thus, the noise of turbulence may be reduced relatively, and the output air pressure of the fan may also be increased.
  • In conclusion, in accordance with the housing structure of a fan of the present invention, the noise of turbulence produced at the air outlet during rotation of the impeller may be reduced, and the output air pressure of the fan may also be increased. In addition, when the bottom face of the support bar is provided with a groove, the groove may be used for mounting electric cords in a sunk manner, so that the housing of the fan may have a better outer appearance. [0020]
  • Although the invention has been explained in relation to its preferred embodiment as mentioned above, it is to be understood that many other possible modifications and variations can be made without departing from the scope of the present invention. It is, therefore, contemplated that the appended claim or claims will cover such modifications and variations that fall within the true scope of the invention. [0021]

Claims (6)

What is claimed is:
1. A housing structure of a fan, comprising: a housing including multiple support bars supporting a seat plate with which a stator is combined, an impeller having a rotation shaft rotatably mounted in a shaft hole of the stator, each of the support bars having a first end connected to the housing and a second end connected to the seat plate, a cross-section of each of the support bars having a highest point, and having an air guide face and an air facing face respectively extended from the highest point, and a bottom face connecting the air guide face and the air facing face; the improvement comprising: the air guide face of each of the support bars is formed with a shape of an inclined face, and an included angle is formed between the inclined face of the air facing face and a vertical line that is vertical to a horizontal line of a bottom face of the seat plate.
2. The housing structure of a fan as claimed in claim 1, wherein the air guide face of each of the support bars is an arc-shaped face.
3. The housing structure of a fan as claimed in claim 1, wherein the air guide face of each of the support bars is an inclined face.
4. The housing structure of a fan as claimed in claim 1, wherein the included angle formed between the inclined face of the air facing face of each of the support bars and the vertical line that is vertical to the horizontal line of the bottom face of the seat plate is ranged between 30° and 70°.
5. The housing structure of a fan as claimed in claim 1, wherein the bottom face of at least one of the multiple support bars is formed with a concave groove for mounting electric cords in a sunk manner.
6. The housing structure of a fan as claimed in claim 1, wherein the support bar of the housing forms an arc-shaped bar.
US09/987,307 2001-11-14 2001-11-14 Housing structure of a fan Expired - Lifetime US6561762B1 (en)

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Application Number Priority Date Filing Date Title
US09/987,307 US6561762B1 (en) 2001-11-14 2001-11-14 Housing structure of a fan
DE20214973U DE20214973U1 (en) 2001-11-14 2002-09-27 Housing for a blower

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US09/987,307 US6561762B1 (en) 2001-11-14 2001-11-14 Housing structure of a fan
DE20214973U DE20214973U1 (en) 2001-11-14 2002-09-27 Housing for a blower

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US6561762B1 US6561762B1 (en) 2003-05-13
US20030091435A1 true US20030091435A1 (en) 2003-05-15

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US20040234374A1 (en) * 2003-05-22 2004-11-25 Arctic-Cooling Switzerland Ag Axial fan for computer
EP1619393A3 (en) * 2004-07-21 2011-11-16 Delta Electronics, Inc. Fan assembly and fan frame thereof
EP1619393A2 (en) 2004-07-21 2006-01-25 Delta Electronics, Inc. Fan assembly and fan frame thereof
US20060045744A1 (en) * 2004-08-27 2006-03-02 Delta Electronics, Inc. Fan frame and fan utilizing the same
EP1847718A4 (en) * 2005-02-07 2013-07-10 Sanyo Electric Co AXIAL FLOW BLOWER
EP1750015A3 (en) * 2005-08-03 2017-07-05 Mitsubishi Heavy Industries, Ltd. Shroud and rotary vane wheel of propeller fan and propeller fan
US20070122285A1 (en) * 2005-11-30 2007-05-31 Sanyo Denki Co., Ltd. Axial-flow fan
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