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GB2374119A - Blower-type fan with dual inlets and a rotor for inducing axial and centrifugal flow - Google Patents

Blower-type fan with dual inlets and a rotor for inducing axial and centrifugal flow Download PDF

Info

Publication number
GB2374119A
GB2374119A GB0108108A GB0108108A GB2374119A GB 2374119 A GB2374119 A GB 2374119A GB 0108108 A GB0108108 A GB 0108108A GB 0108108 A GB0108108 A GB 0108108A GB 2374119 A GB2374119 A GB 2374119A
Authority
GB
United Kingdom
Prior art keywords
casing
fan
blower
air
air inlet
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.)
Withdrawn
Application number
GB0108108A
Other versions
GB0108108D0 (en
Inventor
Alex Horng
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 GB0108108A priority Critical patent/GB2374119A/en
Priority to US09/824,723 priority patent/US20020146318A1/en
Priority to DE20106595U priority patent/DE20106595U1/en
Publication of GB0108108D0 publication Critical patent/GB0108108D0/en
Publication of GB2374119A publication Critical patent/GB2374119A/en
Withdrawn legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K7/00—Arrangements for handling mechanical energy structurally associated with dynamo-electric machines, e.g. structural association with mechanical driving motors or auxiliary dynamo-electric machines
    • H02K7/14—Structural association with mechanical loads, e.g. with hand-held machine tools or 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
    • F04D25/06—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
    • F04D29/26—Rotors specially for elastic fluids
    • F04D29/28—Rotors specially for elastic fluids for centrifugal or helico-centrifugal pumps for radial-flow or helico-centrifugal pumps
    • F04D29/281—Rotors specially for elastic fluids for centrifugal or helico-centrifugal pumps for radial-flow or helico-centrifugal pumps for fans or blowers
    • F04D29/282—Rotors specially for elastic fluids for centrifugal or helico-centrifugal pumps for radial-flow or helico-centrifugal pumps for fans or blowers the leading edge of each vane being substantially parallel to the rotation axis
    • 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
    • F04D29/42—Casings; Connections of working fluid for radial or helico-centrifugal pumps
    • F04D29/4206—Casings; Connections of working fluid for radial or helico-centrifugal pumps especially adapted for elastic fluid pumps
    • F04D29/4226—Fan casings
    • F04D29/424—Double entry casings

Landscapes

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

Abstract

A blower-type fan comprises a casing 1 including a compartment 11, an air outlet 12 and an air inlet 14. A bobbin 2 is mounted in the compartment 11 and includes an axle hole 23 for a central shaft 61 of a fan wheel 6. The fan wheel 6 includes a central plate 62 and an annular ring 64 which may be connected to the plate 62 by spokes, which may be in the form of axial flow fan blades 65, defining openings 66 through which air can pass. A number of fan blades 63 are mounted on the annular ring 64, and a cover 4, including an inlet 41, is attached to the casing 1. When the fan wheel 6 turns, air is drawn into the casing 1 through inlets 14 and 41 and is expelled through outlet 12.

Description

Blower-Type Fan with Dual Inlet Arrangements Background of the Invention 1. Field of the Invention The present invention relates to a blower-type fan with dual inlet arrangements, and more particularly to a blower-type heat-dissipating fan for sucking a larger amount of cool air.
2. Description of the Related Art Fig. 1 illustrates a conventional blower-type heat-dissipating fan that includes a casing 91 having a sealed bottom and an annular wall 92. A bobbin 93 is mounted to an eccentric position of the bottom of the casing 91 for rotatably supporting a fan wheel 94, and a cover 95 is mounted to top of the casing 91. The cover 95 includes an air inlet 96. When the fan wheel 94 turns, the fan blades 97 drive air current to thereby suck cool air into the casing 91 via the air inlet 96 and output the cool air via an air outlet 98 in the casing 91.
Nevertheless, there is only one air inlet 96 in such a conventional blower-type heatdissipating fan for sucking cool air and the amount of incoming air is, of course, equal to the amount of outgoing air for the fan. It is, therefore, impossible to increase the amount of air output without increasing the size of the blower-type heat-dissipating fan.
Summary of the Invention It is an object of the present invention to provide a blower-type fan with dual inlet arrangements to increase the amount of air output without increasing the size of the blowertype heat-dissipating fan.
A blower-type fan in accordance with the present invention comprises a casing comprising a compartment and an air outlet. A bottom of the casing includes at least one air inlet. A bobbin is mounted in the compartment of the casing and includes an axle hole for rotatably holding a central shaft of a fan wheel. The fan wheel includes a central plate and an annular ring that surrounds the central plate and that is connected to the central plate by a plurality of spokes, thereby defining at least one opening through which air is passable. A plurality of fan blades is mounted on the annular ring. A cover is engaged to the casing and
includes an air inlet. When the fan wheel turns, cool air is sucked into the casing via the air inlet of the casing and the air inlet of the cover and exits the casing via the air outlet of the casing.
Other objects, specific advantages, and novel features of the invention will become more apparent from the following detailed description and preferable embodiments when taken in conjunction with the accompanying drawings.
Brief Description of the Drawings Fig. 1 is an exploded perspective view of a conventional blower-type heat-dissipating fan.
Fig. 2 is an exploded perspective view of a first embodiment of a blower-type heatdissipating fan in accordance with the present invention.
Fig. 3 is a top view of the blower-type heat-dissipating fan in Fig. 2.
Fig. 4 is a sectional view taken along line 4-4 in Fig. 3.
Fig. 5 is an exploded perspective view of a second embodiment of the blower-type heatdissipating fan in accordance with the present invention.
Fig. 6 is a sectional view of the blower-type heat-dissipating fan in Fig. 5.
Fig. 7 is an exploded perspective view of a third embodiment of the blower-type heatdissipating fan in accordance with the present invention.
Fig. 8 is a sectional view of the blower-type heat-dissipating fan in Fig. 7.
Detailed Description of the Preferred Embodiments Preferred embodiments in accordance with the present invention will now be described with reference to the accompanying drawings.
Referring to Fig. 2, a first embodiment of a blower-type heat-dissipating fan in accordance with the present invention generally includes a casing 1, a bobbin 2, a fan wheel 3, and a cover 4. The casing 1 includes a compartment 11 and an air outlet 12. A bottom of the casing 1 defining the compartment 11 includes an assembly hole 13 and at least one air inlet 14.
The bobbin 2 is engaged to the bottom of the casing 1. In this embodiment, the bobbin 2 is engaged with the assembly hole 13 of the casing 1. The bobbin 2 may be of a conventional structure comprising pole plates 21, a winding 22, and an axle hole 23 for rotatably holding a central shaft 31 of the fan wheel 3.
The central shaft 31 of the fan wheel 3 is rotatably mounted in the axle hole 23 of the bobbin 2. The fan wheel 3 includes a central plate 32 and an annular ring 34 that surrounds the central plate 32 and that is connected to the central plate 32 by a plurality of spokes 35. A plurality of fan blades 33 is mounted on a side (e. g. , the upper side) of the annular ring 34.
Thus, a plurality of openings 36 is defined between the annular ring 34 and the central plate 32 to allow passage of air. In addition, the openings 36 are aligned with the air inlets 14 in the bottom of the casing 1.
The cover 4 is engaged on the casing 1 and includes an air inlet 41. Cool air is sucked into the casing 1 via the air inlet 41 when the fan wheel 3 is rotated. Preferably, the air inlet 41 has an inner diameter smaller than a maximum diameter of the fan wheel 3.
Fig. 3 is a top view of the first embodiment of the assembled blower-type fan in accordance with the present invention and Fig. 4 is a sectional view of the first embodiment.
The fan wheel 3 is mounted to an eccentric position of the compartment 11 of the casing 1 with the cover 4 covering the top of the casing 1. Thus, the blower-type fan includes an upper air inlet 41, a lower air inlet 14, and an air outlet 12. When the fan wheel 3 is rotated, cool air enters the casing 1 via the two air inlets 41 and 41 and exits the casing 1 via the air outlet 12 under rotational movements of the fan blades 33. As a result, a larger amount of air output is provided to achieve a better heat-dissipating effect.
Figs. 5 and 6 illustrate a second embodiment of the blower-type fan in accordance with the present invention that includes a casing 1, a bobbin 2, a fan wheel 5, and a cover 4. The casing 1 includes a compartment 11 and an air outlet 12. A bottom of the casing 1 defining the compartment 11 includes an assembly hole 13 and at least one air inlet 14.
The bobbin 2 is engaged with the assembly hole 13 of the bottom of the casing 1 and includes pole plates 21, a winding 22, and an axle hole 23 for rotatably holding a central shaft 51 of the fan wheel 5.
The central shaft 51 of the fan wheel 5 is rotatably mounted in the axle hole 23 of the bobbin 2. The fan wheel 5 includes a central plate 52 and an annular ring 55 that surrounds the central plate 52 and that is connected to the central plate 52 by a plurality of spokes 54. Extending radially outward from an outer periphery of the annular ring 55 is a plurality of fan blades 53. Thus, a plurality of openings 56 is defined between the annular ring 55 and the central plate 52 to allow passage of air. In addition, the openings 56 are aligned with the air inlets 14 in the bottom of the casing 1. When the fan wheel 5 rotates, a sucking force is provided in an area above the fan blades 53 and an area below the fan blades 53.
The cover 4 is engaged on the casing 1 and includes an air inlet 41. Cool air is sucked into the casing 1 via the air inlet 41 when the fan wheel 5 is rotated. Preferably, the air inlet 41 has an inner diameter smaller than a maximum diameter of the fan wheel 5.
Fig. 6 illustrates a sectional view of the second embodiment, wherein the fan wheel 5 and the bobbin 2 are mounted in the compartment 11 of the casing 1 with the central shaft 31 of the fan wheel 5 rotatably supported in the axle hole 23 of the bobbin 2 and with the cover 4 covering the top of the casing 1. Thus, the blower-type fan includes an upper air inlet 41, a lower air inlet 14, and an air outlet 12. When the fan wheel 5 is rotated, cool air enters the casing 1 via the two air inlets 41 and 41 and exits the casing 1 via the air outlet 12 under rotational movements of the fan blades 53. As a result, a larger amount of air outlet is provided to achieve a better heat-dissipating effect.
Figs. 7 and 8 illustrate a third embodiment of the blower-type fan in accordance with the present invention that includes a casing 1, a bobbin 2, a fan wheel 6, and a cover 4. The casing 1 includes a compartment 11 and an air outlet 12. A bottom of the casing 1 defining the compartment 11 includes an assembly hole 13 and at least one air inlet 14. In this embodiment,
a portion of the bottom of the casing 1 is recessed and thus protrudes outward beyond the casing 1.
The bobbin 2 is engaged with the assembly hole 13 of the bottom of the casing 1 and includes pole plates 21, a winding 22, and an axle hole 23 for rotatably holding a central shaft 61 of the fan wheel 6.
The central shaft 61 of the fan wheel 6 is rotatably mounted in the axle hole 23 of the bobbin 2. The fan wheel 6 includes a central plate 62 and an annular ring 64 surrounding the central plate 62. A plurality of fan blades 63 is mounted on a side (e. g. , the upper side) of the annular ring 64. The annular ring 64 is connected to the central plate 62 by a plurality of auxiliary fan blades 65. The auxiliary fan blades 65 may be conventional axial flow type fan blades. Thus, a plurality of openings 66 is defined between the annular ring 64 and the central plate 62 to allow passage of air. In addition, the openings 66 are aligned with the air inlets 14 in the bottom of the casing 1. When the fan wheel 6 rotates, the auxiliary fan blades 65 provide an increased effect in sucking cool air into the casing 1.
The cover 4 is engaged on the casing 1 and includes an air inlet 41. Cool air is sucked into the casing 1 via the air inlet 41 when the fan wheel 6 is rotated. Preferably, the air inlet 41 has an inner diameter smaller than a maximum diameter of the fan wheel 6.
Fig. 8 is a sectional view of the third embodiment, wherein the fan wheel 6 and the bobbin 2 are mounted in the compartment 11 of the casing 1 with the central shaft 61 of the fan wheel 6 rotatably supported in the axle hole 23 of the bobbin 2 and with the cover 4 covering the top of the casing 1. Thus, the blower-type fan includes an upper air inlet 41, a lower air inlet 14, and an air outlet 12. When the fan wheel 6 is rotated, cool air enters the casing 1 via the two air inlets 41 and 41 and exits the casing 1 via the air outlet 12 under rotational movements of the fan blades 63. As a result, a larger amount of air outlet is provided to achieve a better heat-dissipating effect.
According to the above description, it is appreciated that, by means of providing an air inlet arrangement in each of the bottom of the casing and the cover and providing openings
aligned with the air inlets m the bottom of the casing, cool air is sucked into the casing via the air inlet arrangements in the bottom of the casing and the cover and then exits the casing via the air outlet in the casing during rotational movement of the fan blades of the fan wheel, thereby increasing the amount of air output of the blower-type fan.
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 invention. It is, therefore, contemplated that the appended claims will cover such modifications and variations that fall within the true scope of the invention.

Claims (5)

  1. What is claimed is : 1. A blower-type fan comprising : a casing 1 comprising a compartment 11 and at least one air outlet 12, a bottom of the casing 1 defining the compartment 11 including at least one air inlet 14; a bobbin 2 mounted in the compartment 11 of the casing 1 and including an axle hole 23; a cover 4 engaged to the casing 1 at a level above the compartment 11, the cover 4 including an air inlet 14; and a fan wheel 3 including a central shaft 31 rotatably mounted in the axle hole 23 of the bobbin 2, the fan wheel 3 including a central plate 32 and an annular ring 34 that surrounds the central plate 32 and that is connected to the central plate 32 by a plurality of spokes 35, thereby defining at least one opening 36 through which air is passable, a plurality of fan blades 33 being mounted on the annular ring 34; wherein when the fan wheel 3 turns, cool air is sucked into the casing 1 via said at least one air inlet 14 of the casing 1 and the air inlet 14 of the cover 4 and exits the casing 1 via said at least one air outlet 12 of the casing 1.
  2. 2. The blower-type fan as claimed in claim 1, wherein said at least one air inlet 12 of the casing 1 is aligned with at least one opening 36 of the fan wheel 3.
  3. 3. The blower-type fan as claimed in claim 1, wherein the annular ring 34 and the central plate 32 of the fan whee 3 are connected by a plurality of auxiliary fan blades 33 for driving cool air toward the central plate 32.
  4. 4. The blower-type fan as claimed in claim 3, wherein the auxiliary blades 33 are axial flow type fan blades.
  5. 5. The blower-type fan as claimed in claim 3, wherein the bottom of the casing 1 defining the compartment 11 includes a recessed portion that protrudes outward beyond the casing 1.
GB0108108A 2001-03-30 2001-03-30 Blower-type fan with dual inlets and a rotor for inducing axial and centrifugal flow Withdrawn GB2374119A (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
GB0108108A GB2374119A (en) 2001-03-30 2001-03-30 Blower-type fan with dual inlets and a rotor for inducing axial and centrifugal flow
US09/824,723 US20020146318A1 (en) 2001-03-30 2001-04-04 Blower-type fan with dual inlet arrangements
DE20106595U DE20106595U1 (en) 2001-03-30 2001-04-10 Blower fan with a double inlet arrangement

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
GB0108108A GB2374119A (en) 2001-03-30 2001-03-30 Blower-type fan with dual inlets and a rotor for inducing axial and centrifugal flow
US09/824,723 US20020146318A1 (en) 2001-03-30 2001-04-04 Blower-type fan with dual inlet arrangements
DE20106595U DE20106595U1 (en) 2001-03-30 2001-04-10 Blower fan with a double inlet arrangement

Publications (2)

Publication Number Publication Date
GB0108108D0 GB0108108D0 (en) 2001-05-23
GB2374119A true GB2374119A (en) 2002-10-09

Family

ID=27219562

Family Applications (1)

Application Number Title Priority Date Filing Date
GB0108108A Withdrawn GB2374119A (en) 2001-03-30 2001-03-30 Blower-type fan with dual inlets and a rotor for inducing axial and centrifugal flow

Country Status (3)

Country Link
US (1) US20020146318A1 (en)
DE (1) DE20106595U1 (en)
GB (1) GB2374119A (en)

Cited By (3)

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Publication number Priority date Publication date Assignee Title
CN102094852B (en) * 2009-12-09 2013-01-02 奇鋐科技股份有限公司 Fan shell structure
CN103573699A (en) * 2012-07-18 2014-02-12 建准电机工业股份有限公司 Horizontal convection fan and fan wheel thereof
CN105020171A (en) * 2015-08-11 2015-11-04 胡国贤 Draught fan

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US20060051203A1 (en) * 2004-09-09 2006-03-09 Sen-Yung Lee High volume fan device for removing heat from heat sources
ES2276586B1 (en) * 2005-05-10 2008-05-16 Universitat Politecnica De Catalunya CENTRIFUGAL FAN.
JP4935048B2 (en) * 2005-10-27 2012-05-23 日本電産株式会社 Centrifugal fan
JP4899523B2 (en) 2006-02-20 2012-03-21 日本電産株式会社 Centrifugal fan
US7503746B2 (en) * 2006-05-01 2009-03-17 Asia Vital Components Co., Ltd. Fan of heat sink
US20070280818A1 (en) * 2006-06-01 2007-12-06 Chih-Heng Yang Heat-Dissipating Fan
CN100526657C (en) * 2006-06-12 2009-08-12 台达电子工业股份有限公司 Fan frame and its connection structure
CN101725574A (en) * 2008-10-23 2010-06-09 富准精密工业(深圳)有限公司 Centrifugal fan
US20140072434A1 (en) * 2012-09-13 2014-03-13 Asia Vital Components Co., Ltd. Fan impeller structure of centrifugal fan
US9777743B2 (en) * 2012-11-06 2017-10-03 Asia Vital Components Co., Ltd. Centrifugal fan impeller structure
CN103148019B (en) * 2013-03-06 2016-05-04 贵阳远大风机制造有限公司 Two air intake high-pressure high-flow cement in vertical kiln centrifugal fans
TWI505768B (en) * 2013-04-10 2015-10-21 Delta Electronics Inc Centrifugal fan and fan blade thereof
US10947992B2 (en) * 2015-08-17 2021-03-16 Pedro Arnulfo Sarmiento Convectors
US10503220B2 (en) 2016-04-14 2019-12-10 Microsoft Technology Licensing, Llc Viscous flow blower for thermal management of an electronic device
CN107725413B (en) * 2016-08-12 2021-07-13 德昌电机(深圳)有限公司 Fan blower
CN206617363U (en) * 2017-03-01 2017-11-07 讯凯国际股份有限公司 impeller

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US2104233A (en) * 1936-07-30 1938-01-04 William H Leinweber Blower
EP0023784A1 (en) * 1979-08-03 1981-02-11 airsweep Limited Power-driven centrifugal air blower
EP0183655A2 (en) * 1984-11-28 1986-06-04 IMPRESIND S.r.l. Axial and centrifugal fan
US4902199A (en) * 1986-10-14 1990-02-20 Xerox Corporation Universal blower
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Publication number Priority date Publication date Assignee Title
CN102094852B (en) * 2009-12-09 2013-01-02 奇鋐科技股份有限公司 Fan shell structure
CN103573699A (en) * 2012-07-18 2014-02-12 建准电机工业股份有限公司 Horizontal convection fan and fan wheel thereof
CN105020171A (en) * 2015-08-11 2015-11-04 胡国贤 Draught fan

Also Published As

Publication number Publication date
DE20106595U1 (en) 2001-10-11
US20020146318A1 (en) 2002-10-10
GB0108108D0 (en) 2001-05-23

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