GB2401152A - Inlet arrangement for heat dissipating fan - Google Patents

Inlet arrangement for heat dissipating fan Download PDF

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Publication number
GB2401152A
GB2401152A GB0310184A GB0310184A GB2401152A GB 2401152 A GB2401152 A GB 2401152A GB 0310184 A GB0310184 A GB 0310184A GB 0310184 A GB0310184 A GB 0310184A GB 2401152 A GB2401152 A GB 2401152A
Authority
GB
United Kingdom
Prior art keywords
ring
type heat
suspension type
frame
dissipation fan
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
GB0310184A
Other versions
GB2401152B (en
Inventor
Alex Horng
Mei-Ying Hsiao
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
Priority to US10/270,513 priority Critical patent/US20040076514A1/en
Application filed by Sunonwealth Electric Machine Industry Co Ltd filed Critical Sunonwealth Electric Machine Industry Co Ltd
Priority to GB0310184A priority patent/GB2401152B/en
Publication of GB2401152A publication Critical patent/GB2401152A/en
Application granted granted Critical
Publication of GB2401152B publication Critical patent/GB2401152B/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

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
    • F04D29/42—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
    • F04D29/4213—Casings; Connections of working fluid for radial or helico-centrifugal pumps especially adapted for elastic fluid pumps suction ports
    • 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
    • F04D29/403—Casings; Connections of working fluid 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
    • F04D29/522—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
    • F04D29/545—Ducts
    • 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
    • F04D29/60—Mounting; Assembling; Disassembling
    • F04D29/601—Mounting; Assembling; Disassembling specially 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
    • F04D29/60—Mounting; Assembling; Disassembling
    • F04D29/64—Mounting; Assembling; Disassembling of axial pumps
    • F04D29/644—Mounting; Assembling; Disassembling of axial pumps especially adapted for elastic fluid pumps
    • F04D29/646—Mounting or removal of fans

Landscapes

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

Abstract

A suspension type heat dissipating fan comprises an impeller 12, a frame 1 and a ring 2. The frame 1 includes an inner rim 13 defining an opening 11 which is aligned with the impeller 12. The ring 2 is attached to the rim 13 and defines an air inlet with a diameter which is less than the maximum diameter of the impeller 12. The ring 2 may include an annular groove 22 such that it can snap onto the rim 13, or the rim 13 may be countersunk such that a ring may be attached to it with an adhesive ( see figure 7). The ring 2 may include a curved surface 21 which is inclined towards the impeller 12. The arrangement is said to combine improved air flow with ease of manufacture.

Description

2401 1 52
I SUSPENSION TYPE HEAT-DISSIPATION FAN
2 BACKGROUND OF THE INVENTION
3 1. Field of the Invention
4 The present invention relates to a fan and, more particularly, to a suspension type heat-dissipation fan which has an air inlet of a reduced size in order to increase the 6 pressure of airflow into the air inlet.
7 2. Description of Related Art
8 Many types of fans are known. Fig. 8 shows a suspension type heat 9 dissipation fan that includes a frame 80 defining an upper air inlet 81. The frame 80 further has a plurality of downwardly-extending struts 82 supporting a lower hub 83, I I which is provided with a sleeve 84 for rotatably receiving a spindle 86 of an air impeller 12 85. When being turned, the air impeller 85 blows on a heat sink 87 to facilitate l 3 dissipating heat derived from a heat source.
14 However, it has been found that the pressure of airflow into the air inlet 81 is l 5 relative low, since the air impeller 85 is placed into the frame 80 just through the air inlet 16 81 and thus the inlet 81 must has a size larger than the diameter of the impeller 85.
] 7 Fig. 9 shows a conventional blower fan that includes a housing 90 for receiving l 8 and rotatably supporting an air impeller 91. The housing 90 is covered with a top plate l 9 92 which defines an air inlet 93 aligned with the air impeller 91. When being turned, the impeller 91 draws air through the air inlet 93 and blows out a current of air from an air 2 l outlet 94, so as to blow on a heat source.
22 In this conventional fan, the air inlet 93 may have a size smaller than the 23 diameter of the air impeller 91 and so the pressure of airflow into the air inlet 81 is 24 increased, but the air impeller 91 can not be placed into the housing 90 through the air I inlet 93. This makes the fan complex in structure and difficult to be manufactured.
2 OBJECT OF THE INVENTION 3 The object of the present invention is to provide a suspension type heat 4 dissipation fan which can increase the pressure of airflow into an air inlet in a simplified manner.
6 SUMMARY OF THE INVENTION
_.. ... ..
7 The present invention provides a suspension type heat-dissipation fan 8 comprising a frame rotatably supporting an air impeller therein. The frame has an air 9 outlet and is formed with an inner rim defining an opening aligned with the air impeller.
A ring is attached to the rim of the frame and has an inner periphery defining an air inlet 11 of a size smaller than the maximum diameter of said air impeller, so as to increase the 12 pressure of airflow into the air inlet.
13 Other objects, advantages and novel features of this invention will become 14 more apparent from the following detailed description when taken in conjunction with the accompanying drawings.
16 B RIE F D E S C RIP TIO N O F THE DFLI(WINGS 17 Fig. 1 is an exploded perspective view of a preferred embodiment of a 18 suspension type heat-dissipation fan in accordance with the present invention; 19 Fig. 2 is a top view of the suspension type heat-dissipation fan of Fig. 1; Fig. 3 is a cross-sectional view taken along lines 3-3 in Fig. 2; 21 Fig. 4 is an enlarged cross-sectional view taken from part 4 in Fig. 3; 22 Fig. 5 is an exploded perspective view of an alternative embodiment of the 23 inventive fan; 24 Fig. 6 is a top view of the suspension type heat-dissipation fan of Fig. 5; lFig. 7 is a cross-sectional view taken along lines 7-7 in Fig. 6; 2Fig. 8 is an exploded perspective view of a conventional suspension type heat 3 dissipation fan; and 4Fig. 9 is an exploded perspective view of a conventional blower fan.
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT
6Referring to Fig. 1, there is shown a preferred embodiment of a suspension type 7 heat-dissipation fan in accordance with the present invention. The inventive fan 8 includes a frame 1 rotatably supporting an air impeller 12 therein. The frame 1 has an air 9outlet 14, and is formed with an inner rim 13 that defines an upper opening 11 aligned with the air impeller 12.
I lIn the inventive fan, a ring 2 is attached to the rim 13 of the frame 1 and has an l 2 inner periphery that defines an air inlet of a predetermined size smaller than the diameter 13 of the air impeller 12, as best shown in Fig. 2. The air inlet of such a size increases the 14 pressure of air flow in the inlet when the air impeller 12 is in rotation.
15Referring to Figs. 2 and 3, the ring 2 has an inclined end surface 21, preferably 16 configured as a curved surface, that slopes towards the air impeller 12 from its radially l 7 outer portion to its radially inner portion for the purpose of leading air into the air inlet.
18Referring to Fig. 4, the ring 2 can be attached to the inner rim 13 of the frame 1 l') in many ways. For example, the ring 2 may have an outer periphery defining an annular 20groove 22 into which the inner rim 13 can be snapped, thus attaching the ring 2 securely 2 l to the rim 13 and hence to the frame 1.
22Referring to Fig. 5, an alternative embodiment of the inventive fan is shown.
23 Now the fan includes a frame 1 adapted to be installed on a hollow base 4.
24The hollow base 4, made of a metal material having excellent thermal l conductivity, can be connected to the frame 1 by means of a plurality of screws 41. The 2 base 4 has an upright enclosure 42 defining a plurality of vent ports 43 therein. As 3 illustrated, the enclosure 42 preferably consists of four sidewalls with the vent ports 43 4 defined in more than one sidewall of the enclosure 42.
The frame 1 is also provided for rotatably supporting an air impeller 12 therein 6 and is formed with an air outlet 13. However, the frame 1 here has an inner rim 13 7 stepped so as to define a countersunk opening 11, which has an enlarged top part 8 suitable for receiving a ring 3. 9 9 The ring 3 is attached to the stepper rim 13 of the frame 1. Again, the ring 3 has an inner periphery that defines an air inlet of a size smaller than the maximum diameter l l of the air impeller 12, as best shown in Fig. 6.
l 2 Referring to Figs. 6 and 7, the ring 3 is situated in the enlarged top part of the countersunk opening 11, and is attached to the stepped inner rim 13 by means of 14 adhesive. Preferably, the ring 3 has a uniform thickness and combined with the rim 13 to form a common top surface of the frame 1, as shown in Fig. 7, thereby providing the 16 inventive fan with an attractive appearance.
17 From the foregoing, it is apparent that this invention has the advantage of 18 increasing the pressure of airflow into the air inlet, as well as allowing the air impeller 19 l 2 to be placed into the frame 1 through the opening 11 before assembling the ring 2 or 2() 3 to the rim 13.
21 While the principles of this invention have been disclosed in connection with 22 specific embodiments, it should be understood by those skilled in the art that these 23 descriptions are not intended to limit the scope of the invention, and that any 24 modification and variation without departing the spirit of the invention is intended to be I covered by the scope of this invention defined only by the appended claims.

Claims (1)

  1. l WHAT IS CLAIMED IS: 21. A suspension type heat-dissipation fan
    comprising: 3a frame I rotatably supporting an air impeller 12 therein, said fame 1 having an 4air outlet 1 4 and being formed with an inner rim 1 3 defining an opening 11 aligned with s said air impeller 12; and 6a ring 2 attached to said rim 13 of said frame 1, said ring 2 having an inner 7 periphery defining an air inlet of a size smaller than the maximum diameter of said air 8 impeller 12.
    92. The suspension type heat-dissipation fan as claimed in claim 1, wherein said l O ring 2 has an outer periphery defining an annular groove 22, and wherein said inner rim l l l 3 of said frame I is adapted to be snapped into said annular groove 22 of said ring 2.
    123. The suspension type heat-dissipation fan as claimed in claim 1, wherein said 13inner rim 13 of said frame 1 is stepped so as to define a countersunk opening 11, and 14 wherein said ring 3 is attached to said inner rim 13 by means of adhesive.
    154. The suspension type heat-dissipation fan as claimed in claim 1, wherein said 16ring 2 has an inclined end surface 21 sloping towards said air impeller 12 from a radially l 7 outer portion thereof to a radially inner portion thereof for leading air into said air inlet.
    185. The suspension type heat-dissipation fan as claimed in claim 4, wherein said 1') inclined end surface 21 of said ring 2 is configured as a curved surface.
    206. T he suspension type heat-dissipation fan as claimed in claim 3, wherein said 2 l ring 3 has a uniform thickness.
    227. The suspension type heat-dissipation fan as claimed in claim 6, wherein said 23 ring 3 is combined with said rim 13 to form a common top surface of said frame 1.
    248. The suspension type heat-dissipation fan as claimed in claim 1, wherein said I frame 1 is adapted to be installed on a hollow base 4, and wherein said hollow base 4 has 2 an upright enclosure 42 defining a plurality of vent ports 43.
    3 9. The suspension type heat-dissipation fan as claimed in claim 9, wherein said 4 enclosure 42 has four sidewalls, and wherein said vent ports 43 are defined in more than one of said sidewalls of said enclosure 42.
GB0310184A 2002-10-16 2003-05-02 Heat-dissipation fan Expired - Fee Related GB2401152B (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
US10/270,513 US20040076514A1 (en) 2002-10-16 2002-10-16 Suspension type heat-dissipation fan
GB0310184A GB2401152B (en) 2002-10-16 2003-05-02 Heat-dissipation fan

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US10/270,513 US20040076514A1 (en) 2002-10-16 2002-10-16 Suspension type heat-dissipation fan
GB0310184A GB2401152B (en) 2002-10-16 2003-05-02 Heat-dissipation fan

Publications (2)

Publication Number Publication Date
GB2401152A true GB2401152A (en) 2004-11-03
GB2401152B GB2401152B (en) 2006-06-21

Family

ID=33542661

Family Applications (1)

Application Number Title Priority Date Filing Date
GB0310184A Expired - Fee Related GB2401152B (en) 2002-10-16 2003-05-02 Heat-dissipation fan

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US (1) US20040076514A1 (en)
GB (1) GB2401152B (en)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101382154B (en) * 2007-09-07 2011-06-08 富准精密工业(深圳)有限公司 Centrifugal fan
DE102015108489B3 (en) * 2015-05-29 2016-09-29 Halla Visteon Climate Control Corporation Centrifugal blower unit, in particular for motor vehicle air conditioners
CN105936194A (en) * 2015-11-04 2016-09-14 中山市华企在线信息科技有限公司 Solar air suspension system
TWI774627B (en) * 2021-12-28 2022-08-11 元山科技工業股份有限公司 Noise suppression fan

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Publication number Priority date Publication date Assignee Title
DE3429993A1 (en) * 1984-08-16 1986-02-27 Schroff Gmbh, 7541 Straubenhardt Attachment device for electrical axial fans
JPH0919101A (en) * 1995-06-27 1997-01-17 Shicoh Eng Co Ltd Fan motor integrated with heat sink
DE20209392U1 (en) * 2002-06-17 2002-09-12 Clevo Co Radiating fan unit

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US4730551A (en) * 1986-11-03 1988-03-15 Peludat Walter W Heat distributor for suspended ceilings
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JPH0919101A (en) * 1995-06-27 1997-01-17 Shicoh Eng Co Ltd Fan motor integrated with heat sink
DE20209392U1 (en) * 2002-06-17 2002-09-12 Clevo Co Radiating fan unit

Also Published As

Publication number Publication date
US20040076514A1 (en) 2004-04-22
GB2401152B (en) 2006-06-21

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Legal Events

Date Code Title Description
PCNP Patent ceased through non-payment of renewal fee

Effective date: 20090502