US20060204387A1 - External fan - Google Patents

External fan Download PDF

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Publication number
US20060204387A1
US20060204387A1 US11/075,653 US7565305A US2006204387A1 US 20060204387 A1 US20060204387 A1 US 20060204387A1 US 7565305 A US7565305 A US 7565305A US 2006204387 A1 US2006204387 A1 US 2006204387A1
Authority
US
United States
Prior art keywords
chassis
hollow rod
base
external fan
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.)
Abandoned
Application number
US11/075,653
Inventor
Jay Wang
Chih-Ming Cheng
Sander Chang
Vincent Lee
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Priority to US11/075,653 priority Critical patent/US20060204387A1/en
Assigned to LEE, RICHARD reassignment LEE, RICHARD ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: CHANG, SANDER, CHENG, CHIH-MING, LEE, VINCENT, WANG, JAY
Publication of US20060204387A1 publication Critical patent/US20060204387A1/en
Abandoned 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
    • F04D29/00—Details, component parts, or accessories
    • F04D29/05—Shafts or bearings, or assemblies thereof, specially adapted for elastic fluid pumps
    • F04D29/056—Bearings
    • F04D29/0566—Ceramic bearing designs
    • 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
    • F04D29/02—Selection of particular materials
    • F04D29/023—Selection of particular materials 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
    • F04D29/05—Shafts or bearings, or assemblies thereof, specially adapted for elastic fluid pumps
    • F04D29/053—Shafts
    • 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
    • F05D2300/00—Materials; Properties thereof
    • F05D2300/20—Oxide or non-oxide ceramics

Definitions

  • the present invention relates to an improved external fan, and more particularly to an improved external fan suitable for operating external to a closed and high-temperature environment.
  • FIG. 1 shows an exploded view of a prior art fan structure, which is an external axial fan.
  • the external axial fan comprises a hollow casing 1 a with a rounded chamber 10 a .
  • a pivotal stage 11 a is arranged on a bottom face of the rounded chamber 10 a and a hollow rod 12 a is projected from the center of pivotal stage 11 a .
  • a stator 2 a is caped to the hollow rod 12 a and is connected to a control circuit 20 a .
  • the stator 2 a comprises a plurality of metal plates 21 a stacked together and an induction coil 22 a wrapped around the metal plates 21 a .
  • a rotator 3 a comprises a hub 30 a , a plurality of blades 31 a and a magnet (not shown) arranged in the hub 30 a .
  • An axis (not shown) is arranged at center of the hub 30 a and passes bearings 13 a arranged in the hollow rod 12 a such that the rotator 3 a is placed in the rounded chamber 10 a.
  • the fan is generally placed outside the working environment and blows cool air into the working environment and ejects hot air from the working environment to cool the working environment.
  • an internal fan is also required to produce a convection effect for heat exchange between working environment and external ambience.
  • the design of prior art fan is not suitable for high-temperature operation. The operation of fan will be unstable and the lifetime is limited for high-temperature operation.
  • the blade size is limited when the blades are fixed on the hub and the design of the blade is also limited.
  • the present invention provides an improved external fan suitable for operating external to a closed and high-temperature environment.
  • the stator and the rotator of the fan are external to the high-temperature environment and the fan comprises a ceramic axis made of heat-resistant and durable material. Therefore the lifetime and stability of the fan can be ensured.
  • the present invention provides an external fan mounted on a chassis and including a retaining stage and a ceramic axis.
  • the retaining stage is arranged on one external side of the chassis and includes a base and a hollow rod erecting on the base.
  • a stator is arranged outside the hollow rod.
  • the ceramic axis passes into the hollow rod and includes a first end connected to a rotator wrapped outside the stator and a second end extending out of a bottom of the base and connected to a blade inside the chassis.
  • FIG. 1 shows an exploded view of a prior art fan structure.
  • FIG. 2 shows an exploded view of the present invention.
  • FIG. 3 shows a perspective view of the present invention.
  • FIG. 4 is a sectional view of the present invention.
  • FIG. 5 shows an application of the present invention.
  • the present invention provides an improved external fan.
  • the external fan is mounted to a closed chassis of an electronic device during use and provides air convection for the closed chassis.
  • the external fan comprises a retaining stage 1 and a ceramic axis 2 .
  • the retaining stage 1 comprises a base 10 for assembling the retaining stage 1 and the base 10 comprises a plurality of flanges 100 on outer peripheral thereof. Moreover, each of the flanges 100 comprises a clamping hole 101 through which screwing units 50 are assembled.
  • a hollow rod 11 is projected at center of the base 10 and through the center of the base 10 .
  • a stator 3 is provided outside the hollow rod 11 and is connected to a control circuit 32 .
  • the stator 3 comprises a plurality of metal plates 30 stacked together and an induction coil 31 wrapped around the metal plates 30 . When the control circuit 32 supplies electrical current to the induction coil 31 , the induction coil 31 excites magnetic field.
  • the ceramic axis 2 is resistant to high temperature and passes through the hollow rod 11 .
  • a plurality of bearings 20 is provided in the hollow rod 11 and caped to the ceramic axis 2 . Both ends of the ceramic axis 2 expose out of the hollow rod 11 with one end connected to a rotator 4 .
  • the rotator 4 wraps outside the stator 3 and comprises a hub 40 and a magnetic unit 41 provided on inner face of the hub 40 .
  • the one end of the ceramic axis 2 is connected to bottom center of the hub 40 ; another end of the ceramic axis 2 extends out of a bottom of the retaining stage 1 and comprises a thread portion 21 for screwing to a blade 22 .
  • the blade 22 is made of material resistant to high temperature.
  • the spiral direction of the thread portion 21 is opposite to the rotation direction of the rotator 4 .
  • the external-rotation fan according to the present invention can be constructed by above-mentioned manner.
  • the fan is mounted to a chassis 5 of an electronic device from external direction by engaging the flanges 100 into the chassis and screwing the screwing unit 50 (such as screw or bolt) into the clamping hole 101 .
  • the ceramic axis 2 is inserted into the chassis and the blade 22 can be mounted on the ceramic axis 2 by the thread portion 21 subsequently.
  • the blade 22 is operated for air convection inside the closed chassis, whereby the air inside the chassis 5 has sufficient heat exchange for heat dissipation.
  • the blade 22 is designed to separate with the hub 40 . Therefore the blade 22 could have larger size.
  • the shape of the blade 22 is not limited by the hub 40 because the blade 22 is extended from the ceramic axis 2 instead of the hub 40 .
  • the stator 3 and the rotator 4 of the fan are external to the chassis 5 and are exempted from high temperature in the chassis 5 during operation. Therefore the lifetime and stability of the fan can be ensured.

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

Abstract

An external fan is mounted on a chassis and includes a retaining stage and a ceramic axis. The retaining stage is arranged on one external side of the chassis and includes a base and a hollow rod erecting on the base. A stator is arranged outside the hollow rod. The ceramic axis passes into the hollow rod and includes a first end connected to a rotator wrapped outside the stator and a second end extending out of a bottom of the base and connected to a blade inside the chassis.

Description

    BACKGROUND OF THE INVENTION
  • 1. Field of the Invention
  • The present invention relates to an improved external fan, and more particularly to an improved external fan suitable for operating external to a closed and high-temperature environment.
  • 2. Description of Related Art
  • FIG. 1 shows an exploded view of a prior art fan structure, which is an external axial fan. The external axial fan comprises a hollow casing 1 a with a rounded chamber 10 a. A pivotal stage 11 a is arranged on a bottom face of the rounded chamber 10 a and a hollow rod 12 a is projected from the center of pivotal stage 11 a. A stator 2 a is caped to the hollow rod 12 a and is connected to a control circuit 20 a. The stator 2 a comprises a plurality of metal plates 21 a stacked together and an induction coil 22 a wrapped around the metal plates 21 a. A rotator 3 a comprises a hub 30 a, a plurality of blades 31 a and a magnet (not shown) arranged in the hub 30 a. An axis (not shown) is arranged at center of the hub 30 a and passes bearings 13 a arranged in the hollow rod 12 a such that the rotator 3 a is placed in the rounded chamber 10 a.
  • The fan is generally placed outside the working environment and blows cool air into the working environment and ejects hot air from the working environment to cool the working environment. However, for a closed working environment, an internal fan is also required to produce a convection effect for heat exchange between working environment and external ambience. The design of prior art fan is not suitable for high-temperature operation. The operation of fan will be unstable and the lifetime is limited for high-temperature operation. Moreover, the blade size is limited when the blades are fixed on the hub and the design of the blade is also limited.
    • SUMMARY OF THE INVENTION
  • The present invention provides an improved external fan suitable for operating external to a closed and high-temperature environment. The stator and the rotator of the fan are external to the high-temperature environment and the fan comprises a ceramic axis made of heat-resistant and durable material. Therefore the lifetime and stability of the fan can be ensured.
  • Accordingly, the present invention provides an external fan mounted on a chassis and including a retaining stage and a ceramic axis. The retaining stage is arranged on one external side of the chassis and includes a base and a hollow rod erecting on the base. A stator is arranged outside the hollow rod. The ceramic axis passes into the hollow rod and includes a first end connected to a rotator wrapped outside the stator and a second end extending out of a bottom of the base and connected to a blade inside the chassis.
    • BRIEF DESCRIPTION OF DRAWING
  • The features of the invention believed to be novel are set forth with particularity in the appended claims. The invention itself however may be best understood by reference to the following detailed description of the invention, which describes certain exemplary embodiments of the invention, taken in conjunction with the accompanying drawings in which:
  • FIG. 1 shows an exploded view of a prior art fan structure.
  • FIG. 2 shows an exploded view of the present invention.
  • FIG. 3 shows a perspective view of the present invention.
  • FIG. 4 is a sectional view of the present invention.
  • FIG. 5 shows an application of the present invention.
    • DETAILED DESCRIPTION OF THE INVENTION
  • With reference to FIGS. 2 to 4, the present invention provides an improved external fan. As shown in FIG. 5, the external fan is mounted to a closed chassis of an electronic device during use and provides air convection for the closed chassis. The external fan comprises a retaining stage 1 and a ceramic axis 2.
  • The retaining stage 1 comprises a base 10 for assembling the retaining stage 1 and the base 10 comprises a plurality of flanges 100 on outer peripheral thereof. Moreover, each of the flanges 100 comprises a clamping hole 101 through which screwing units 50 are assembled. A hollow rod 11 is projected at center of the base 10 and through the center of the base 10. A stator 3 is provided outside the hollow rod 11 and is connected to a control circuit 32. The stator 3 comprises a plurality of metal plates 30 stacked together and an induction coil 31 wrapped around the metal plates 30. When the control circuit 32 supplies electrical current to the induction coil 31, the induction coil 31 excites magnetic field.
  • The ceramic axis 2 is resistant to high temperature and passes through the hollow rod 11. A plurality of bearings 20 is provided in the hollow rod 11 and caped to the ceramic axis 2. Both ends of the ceramic axis 2 expose out of the hollow rod 11 with one end connected to a rotator 4. The rotator 4 wraps outside the stator 3 and comprises a hub 40 and a magnetic unit 41 provided on inner face of the hub 40. The one end of the ceramic axis 2 is connected to bottom center of the hub 40; another end of the ceramic axis 2 extends out of a bottom of the retaining stage 1 and comprises a thread portion 21 for screwing to a blade 22. The blade 22 is made of material resistant to high temperature. The spiral direction of the thread portion 21 is opposite to the rotation direction of the rotator 4.
  • The external-rotation fan according to the present invention can be constructed by above-mentioned manner.
  • As shown in FIG. 5, the fan is mounted to a chassis 5 of an electronic device from external direction by engaging the flanges 100 into the chassis and screwing the screwing unit 50 (such as screw or bolt) into the clamping hole 101. Moreover, the ceramic axis 2 is inserted into the chassis and the blade 22 can be mounted on the ceramic axis 2 by the thread portion 21 subsequently. The blade 22 is operated for air convection inside the closed chassis, whereby the air inside the chassis 5 has sufficient heat exchange for heat dissipation.
  • The blade 22 is designed to separate with the hub 40. Therefore the blade 22 could have larger size. The shape of the blade 22 is not limited by the hub 40 because the blade 22 is extended from the ceramic axis 2 instead of the hub 40. The stator 3 and the rotator 4 of the fan are external to the chassis 5 and are exempted from high temperature in the chassis 5 during operation. Therefore the lifetime and stability of the fan can be ensured.
  • Although the present invention has been described with reference to the preferred embodiment thereof, it will be understood that the invention is not limited to the details thereof. Various substitutions and modifications have suggested in the foregoing description, and other will occur to those of ordinary skill in the art. Therefore, all such substitutions and modifications are intended to be embraced within the scope of the invention as defined in the appended claims.

Claims (6)

1. An external fan mounted on a chassis, comprising:
a retaining stage arranged on one external side of the chassis and comprising a base and a hollow rod erecting on the base, a stator arranged outside the hollow rod; and
a ceramic axis passing into the hollow rod and comprising a first end connected to a rotator wrapped outside the stator and a second end extending out of a bottom of the base and connected to a blade inside the chassis.
2. The external fan as in claim 1, wherein the base comprises a plurality of flanges, each of the flanges comprises a clamping hole through which a screwing member is engaged.
3. The external fan as in claim 1, wherein the hollow rod comprises a plurality of bearings therein and capped on the ceramic axis.
4. The external fan as in claim 1, wherein the second end of the ceramic axis comprises a thread portion for screwing to the blade.
5. The external fan as in claim 4, wherein a spiral direction of the thread portion is opposite to a rotation direction of the rotator.
6. The external fan as in claim 1, wherein the blade is extended from a portion near the ceramic axis.
US11/075,653 2005-03-10 2005-03-10 External fan Abandoned US20060204387A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
US11/075,653 US20060204387A1 (en) 2005-03-10 2005-03-10 External fan

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US11/075,653 US20060204387A1 (en) 2005-03-10 2005-03-10 External fan

Publications (1)

Publication Number Publication Date
US20060204387A1 true US20060204387A1 (en) 2006-09-14

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Family Applications (1)

Application Number Title Priority Date Filing Date
US11/075,653 Abandoned US20060204387A1 (en) 2005-03-10 2005-03-10 External fan

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Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4135253A (en) * 1976-11-30 1979-01-23 Medtronic, Inc. Centrifugal blood pump for cardiac assist
US4915589A (en) * 1988-05-17 1990-04-10 Elektroschmelzwerk Kempten Gmbh Runner with mechanical coupling
US5102305A (en) * 1988-12-13 1992-04-07 Allied-Signal Inc. Turbomachine having a unitary ceramic rotating assembly
US6547540B1 (en) * 2001-09-19 2003-04-15 Sunonwealth Electric Machine Industry Co., Ltd. Supercharging structure for a fan

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4135253A (en) * 1976-11-30 1979-01-23 Medtronic, Inc. Centrifugal blood pump for cardiac assist
US4915589A (en) * 1988-05-17 1990-04-10 Elektroschmelzwerk Kempten Gmbh Runner with mechanical coupling
US5102305A (en) * 1988-12-13 1992-04-07 Allied-Signal Inc. Turbomachine having a unitary ceramic rotating assembly
US6547540B1 (en) * 2001-09-19 2003-04-15 Sunonwealth Electric Machine Industry Co., Ltd. Supercharging structure for a fan

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Legal Events

Date Code Title Description
AS Assignment

Owner name: LEE, RICHARD, TAIWAN

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:WANG, JAY;CHENG, CHIH-MING;CHANG, SANDER;AND OTHERS;REEL/FRAME:016383/0385

Effective date: 20050218

STCB Information on status: application discontinuation

Free format text: ABANDONED -- FAILURE TO RESPOND TO AN OFFICE ACTION