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US20120051940A1 - Waterproof Heat-Dissipating Fan - Google Patents

Waterproof Heat-Dissipating Fan Download PDF

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Publication number
US20120051940A1
US20120051940A1 US12/868,606 US86860610A US2012051940A1 US 20120051940 A1 US20120051940 A1 US 20120051940A1 US 86860610 A US86860610 A US 86860610A US 2012051940 A1 US2012051940 A1 US 2012051940A1
Authority
US
United States
Prior art keywords
waterproof
circuit board
coil
sealed room
partition board
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
US12/868,606
Inventor
Ching-Tang Liu
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 US12/868,606 priority Critical patent/US20120051940A1/en
Publication of US20120051940A1 publication Critical patent/US20120051940A1/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
    • F04D29/08—Sealings
    • F04D29/083—Sealings 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
    • 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

Definitions

  • the present invention relates to a heat-dissipating fan, and more particularly to a waterproof heat-dissipating fan.
  • Heat-dissipating fans are widely used along with the development of science and technology, from a CPU to a server; from a simple communication apparatus to an outdoor base station.
  • the heat-dissipating fans are gradually important.
  • the conventional heat-dissipating fans don't provide a waterproof function.
  • the circuit board in the fan may have a short circuit when being contact with water to result in malfunction of the fan.
  • the expensive server or other apparatus may be burned or damaged.
  • the vacuum plating film is that the surface of the circuit board is plated with a film to provide a waterproof function. But, there are some shortcomings:
  • the electronic components on the circuit board may be damaged during the process of plating film, which results in malfunction of the fan;
  • the glue-filling uses glue to fill the circumferential and inner spaces of the circuit board to provide a waterproof function.
  • the glue is thick, which influences the heat dissipation of the circuit board.
  • the circuit board may be burned easily and the fan malfunctions.
  • to coagulate the glue generates internal stress which may damage the electronic components on the circuit board.
  • the primary objective of the present invention is to provide a waterproof heat-dissipating fan which is simple in configuration and has a longer service life to solve the waterproof protection problems of the circuit board.
  • a waterproof heat-dissipating fan which comprises a stator and a rotor.
  • the stator comprises a fan frame, a coil and a circuit board.
  • the coil is fitted on an axle of the fan frame.
  • the circuit board is fixed under the coil.
  • the axle is provided with a partition board.
  • the fan frame includes a waterproof lid to cover the partition board and a sealed room defined between the waterproof lid and the partition board.
  • the circuit board is located in the sealed room.
  • the coil is located out of the sealed room.
  • the coil is electronically connected with the circuit board through a conductive member which penetrates the sealed room.
  • the sealed room is provided to accommodate the circuit board and the circuit board is connected with the coil out of the sealed room through the conductive member, providing a waterproof protection for the circuit board.
  • the partition board has a chamber facing downward.
  • the waterproof lid covers the chamber from bottom to top to form the sealed room between the waterproof lid and the partition board.
  • the partition board has the chamber facing upward.
  • the waterproof lid covers the chamber from top to bottom to form the sealed room between the waterproof lid and the partition board.
  • a washer is provided between a circumferential portion of the waterproof lid and the chamber.
  • the sealed room has a through hole for insertion of the conductive member and a waterproof sealant is provided between an inner wall of the through hole and the conductive member.
  • the conductive member is a copper needle.
  • the present invention provides the sealed room to accommodate the circuit board, and the circuit board is connected with the coil out of the sealed room through a conductive member, providing a waterproof protection for the circuit board.
  • FIG. 1 is an exploded view according to a first embodiment of the present invention
  • FIG. 2 is a cross-sectional view showing a fan frame according to the first embodiment of the present invention
  • FIG. 3 is a perspective view showing the fan frame according to the first embodiment of the present invention.
  • FIG. 4 is a side sectional view showing a waterproof lid according to the first embodiment of the present invention.
  • FIG. 5 is a cross-sectional view according to the first embodiment of the present invention.
  • FIG. 6 is an exploded view according to a second embodiment of the present invention.
  • FIG. 7 is a cross-sectional view according to the second embodiment of the present invention.
  • a waterproof heat-dissipating fan according to a first embodiment of the present invention comprises a stator 10 and a rotor 20 .
  • the stator 10 comprises a fan frame 11 , a coil 12 and a circuit board 13 .
  • the fan frame 11 has an axle 110 extending upward from a bottom of the fan frame 11 .
  • the coil 12 is fitted on the axle 110 .
  • the axle 110 is provided with a partition board 111 .
  • the partition board 111 has a chamber 112 facing downward.
  • the fan frame 11 comprises a waterproof lid 113 to cover the chamber 112 from bottom to top.
  • a sealed room 114 is defined between the waterproof lid 113 and the partition board 111 .
  • the waterproof lid 113 has engaging legs 1131 corresponding to engaging recesses 115 .
  • a washer 1141 is provided between a circumferential portion of the waterproof lid 113 and the chamber 112 .
  • the washer 1141 is made of flexible rubber, providing a sealed effect to the sealed room 114 .
  • the circuit board 13 is located in the sealed room 114 .
  • the circuit board 13 is electrically connected to the coil 12 out of the sealed room 114 through a copper needle 116 .
  • the sealed room 114 has a through hole 1142 for insertion of the copper needle 116 .
  • a waterproof sealant 17 is provided between an inner wall of the through hole 1142 and the copper needle 116 .
  • the rotor 20 comprises a bearing 21 , a magnetic ring 22 and blades 23 .
  • the bearing 21 is inserted in the axle 110 .
  • the magnetic ring 22 is fitted on the coil 12 and mounted in the blades 23 .
  • the blades 23 have a shaft 231 .
  • the shaft 231 is fixed to the bearing 21 to drive the blades 23 along the rotation of the bearing 21 .
  • a second embodiment is substantially similar to the first embodiment with the exceptions described hereinafter.
  • the partition board 111 has the chamber 112 facing upward.
  • the waterproof lid 113 is to cover the chamber 112 from top to bottom.
  • the sealed room 114 is defined between the waterproof lid 113 and the partition board 111 for the circuit board 13 to be received therein.
  • the second embodiment and the first embodiment have the same work principle.
  • the coil 12 and the magnetic ring 22 generate a magnetic field to drive the bearing 21 , and then the blades 23 are driven to turn.
  • the feature of the present invention is that the sealed room is provided to accommodate the circuit board and the circuit board is connected with the coil out of the sealed room through a conductive member, providing a waterproof protection for the circuit board.

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

Abstract

A waterproof heat-dissipating fan includes a stator and a rotor. The stator includes a fan frame, a coil and a circuit board. The coil is fitted on an axle of the fan frame. The circuit board is fixed under the coil. The axle is provided with a partition board. The fan frame includes a waterproof lid to cover the partition board and a sealed room defined between the waterproof lid and the partition board. The circuit board is located in the sealed room. The coil is located out of the sealed room. The coil is electronically connected with the circuit board through a conductive member which penetrates the sealed room. The sealed room is provided to accommodate the circuit board and the circuit board is connected with the coil out of the sealed room through the conductive member, providing a waterproof protection for the circuit board.

Description

    BACKGROUND OF THE INVENTION
  • 1. Field of the Invention The present invention relates to a heat-dissipating fan, and more particularly to a waterproof heat-dissipating fan.
  • 2. Description of the Prior Art
  • Heat-dissipating fans are widely used along with the development of science and technology, from a CPU to a server; from a simple communication apparatus to an outdoor base station. Nowadays, the heat-dissipating fans are gradually important. However, the conventional heat-dissipating fans don't provide a waterproof function. The circuit board in the fan may have a short circuit when being contact with water to result in malfunction of the fan. The expensive server or other apparatus may be burned or damaged.
  • Therefore, there are some waterproof heat-dissipating fans on the market, which adopt two ways: one is that the circuit board is treated with a vacuum plating film, and the other is treated with glue-filling.
  • The vacuum plating film is that the surface of the circuit board is plated with a film to provide a waterproof function. But, there are some shortcomings:
  • 1. The cost is expensive, which is unfavorable to competition;
  • 2. The electronic components on the circuit board may be damaged during the process of plating film, which results in malfunction of the fan;
  • 3. It is difficult to find out the damage of the products in case of collision, which is unable to ensure the quality of the products.
  • The glue-filling uses glue to fill the circumferential and inner spaces of the circuit board to provide a waterproof function. In this way, the glue is thick, which influences the heat dissipation of the circuit board. The circuit board may be burned easily and the fan malfunctions. Besides, to coagulate the glue generates internal stress which may damage the electronic components on the circuit board.
    • SUMMARY OF THE INVENTION
  • The primary objective of the present invention is to provide a waterproof heat-dissipating fan which is simple in configuration and has a longer service life to solve the waterproof protection problems of the circuit board.
  • According to the present invention, there is provided a waterproof heat-dissipating fan which comprises a stator and a rotor. The stator comprises a fan frame, a coil and a circuit board. The coil is fitted on an axle of the fan frame. The circuit board is fixed under the coil. The axle is provided with a partition board. The fan frame includes a waterproof lid to cover the partition board and a sealed room defined between the waterproof lid and the partition board. The circuit board is located in the sealed room. The coil is located out of the sealed room. The coil is electronically connected with the circuit board through a conductive member which penetrates the sealed room. The sealed room is provided to accommodate the circuit board and the circuit board is connected with the coil out of the sealed room through the conductive member, providing a waterproof protection for the circuit board.
  • Preferably, the partition board has a chamber facing downward. The waterproof lid covers the chamber from bottom to top to form the sealed room between the waterproof lid and the partition board.
  • Alternatively, the partition board has the chamber facing upward. The waterproof lid covers the chamber from top to bottom to form the sealed room between the waterproof lid and the partition board.
  • Preferably, a washer is provided between a circumferential portion of the waterproof lid and the chamber.
  • Preferably, the sealed room has a through hole for insertion of the conductive member and a waterproof sealant is provided between an inner wall of the through hole and the conductive member.
  • Preferably, the conductive member is a copper needle.
  • Compared to the prior art, the present invention provides the sealed room to accommodate the circuit board, and the circuit board is connected with the coil out of the sealed room through a conductive member, providing a waterproof protection for the circuit board.
    • BRIEF DESCRIPTION OF THE DRAWINGS
  • FIG. 1 is an exploded view according to a first embodiment of the present invention;
  • FIG. 2 is a cross-sectional view showing a fan frame according to the first embodiment of the present invention;
  • FIG. 3 is a perspective view showing the fan frame according to the first embodiment of the present invention;
  • FIG. 4 is a side sectional view showing a waterproof lid according to the first embodiment of the present invention;
  • FIG. 5 is a cross-sectional view according to the first embodiment of the present invention;
  • FIG. 6 is an exploded view according to a second embodiment of the present invention, and
  • FIG. 7 is a cross-sectional view according to the second embodiment of the present invention.
    •  DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS
  • Embodiments of the present invention will now be described, by way of example only, with reference to the accompanying drawings.
  • As shown in FIG. 1 to FIG. 5, a waterproof heat-dissipating fan according to a first embodiment of the present invention comprises a stator 10 and a rotor 20.
  • The stator 10 comprises a fan frame 11, a coil 12 and a circuit board 13. The fan frame 11 has an axle 110 extending upward from a bottom of the fan frame 11. The coil 12 is fitted on the axle 110. The axle 110 is provided with a partition board 111. The partition board 111 has a chamber 112 facing downward. The fan frame 11 comprises a waterproof lid 113 to cover the chamber 112 from bottom to top. A sealed room 114 is defined between the waterproof lid 113 and the partition board 111. The waterproof lid 113 has engaging legs 1131 corresponding to engaging recesses 115. A washer 1141 is provided between a circumferential portion of the waterproof lid 113 and the chamber 112. The washer 1141 is made of flexible rubber, providing a sealed effect to the sealed room 114. The circuit board 13 is located in the sealed room 114. The circuit board 13 is electrically connected to the coil 12 out of the sealed room 114 through a copper needle 116. The sealed room 114 has a through hole 1142 for insertion of the copper needle 116. A waterproof sealant 17 is provided between an inner wall of the through hole 1142 and the copper needle 116.
  • The rotor 20 comprises a bearing 21, a magnetic ring 22 and blades 23. The bearing 21 is inserted in the axle 110. The magnetic ring 22 is fitted on the coil 12 and mounted in the blades 23. The blades 23 have a shaft 231. The shaft 231 is fixed to the bearing 21 to drive the blades 23 along the rotation of the bearing 21.
  • Referring to FIG. 6 and FIG. 7, a second embodiment is substantially similar to the first embodiment with the exceptions described hereinafter. The partition board 111 has the chamber 112 facing upward. The waterproof lid 113 is to cover the chamber 112 from top to bottom. The sealed room 114 is defined between the waterproof lid 113 and the partition board 111 for the circuit board 13 to be received therein.
  • When in use, the second embodiment and the first embodiment have the same work principle. By using the electromagnetic induction principle, the coil 12 and the magnetic ring 22 generate a magnetic field to drive the bearing 21, and then the blades 23 are driven to turn.
  • The feature of the present invention is that the sealed room is provided to accommodate the circuit board and the circuit board is connected with the coil out of the sealed room through a conductive member, providing a waterproof protection for the circuit board.
  • Although particular embodiments of the present invention have been described in detail for purposes of illustration, various modifications and enhancements may be made without departing from the spirit and scope of the present invention. Accordingly, the present invention is not to be limited except as by the appended claims.

Claims (7)

What is claimed is:
1. A waterproof heat-dissipating fan, comprising a stator and a rotor, the stator comprising a fan frame, a coil and a circuit board, the coil being fitted on an axle of the fan frame, the circuit board being fixed under the coil, characterized by: the axle being provided with a partition board, the fan frame comprising a waterproof lid to cover the partition board and a sealed room defined between the waterproof lid and the partition board, the circuit board being located in the sealed room, the coil being located out of the sealed room, the coil being electronically connected with the circuit board through a conductive member which penetrates the sealed room.
2. The waterproof heat-dissipating fan as claimed in claim 1, wherein the partition board has a chamber facing downward, the waterproof lid covering the chamber from bottom to top to form the sealed room between the waterproof lid and the partition board.
3. The waterproof heat-dissipating fan as claimed in claim 1, wherein the partition board has the chamber facing upward, the waterproof lid covering the chamber from top to bottom to form the sealed room between the waterproof lid and the partition board.
4. The waterproof heat-dissipating fan as claimed in claim 2, wherein a washer is provided between a circumferential portion of the waterproof lid and the chamber.
5. The waterproof heat-dissipating fan as claimed in claim 3, wherein a washer is provided between a circumferential portion of the waterproof lid and the chamber.
6. The waterproof heat-dissipating fan as claimed in claim 1, wherein the sealed room has a through hole for insertion of the conductive member and a waterproof sealant is provided between an inner wall of the through hole and the conductive member.
7. The waterproof heat-dissipating fan as claimed in claim 6, wherein the conductive member is a copper needle.
US12/868,606 2010-08-25 2010-08-25 Waterproof Heat-Dissipating Fan Abandoned US20120051940A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
US12/868,606 US20120051940A1 (en) 2010-08-25 2010-08-25 Waterproof Heat-Dissipating Fan

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US12/868,606 US20120051940A1 (en) 2010-08-25 2010-08-25 Waterproof Heat-Dissipating Fan

Publications (1)

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US20120051940A1 true US20120051940A1 (en) 2012-03-01

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20130192581A1 (en) * 2011-08-05 2013-08-01 Michael Haefner Vehicle heater with integrated fan motor and control device
EP2884111A1 (en) * 2013-12-12 2015-06-17 Sanyo Denki Co., Ltd. Axial flow fan and series axial flow fan
US10021775B1 (en) * 2017-06-19 2018-07-10 Asia Vital Components Co., Ltd. Circuit board and fan frame connection structure
WO2021053034A1 (en) * 2019-09-16 2021-03-25 Ebm-Papst Mulfingen Gmbh & Co. Kg Connection of at least two components of a fan and method for connecting the two components of the fan to each other

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4855849A (en) * 1986-04-21 1989-08-08 Iomega Corporation Disk drive motor mount
TW382382U (en) * 1996-06-06 2000-02-11 Takigen Mfg Co Door lock handle assembly with a mechanism for ascertaining of locking condition
US6158985A (en) * 1998-10-07 2000-12-12 Sanyo Denki Co., Ltd. Air fan including waterproof structure
US20020025261A1 (en) * 2000-08-22 2002-02-28 Naruhiko Kudo Centrifugal fan with waterproof structure
CN201125876Y (en) * 2007-12-05 2008-10-01 东莞寮步新旧围永立电机厂 Waterproof and salt fog-proof cooling fan
US20080260530A1 (en) * 2007-04-18 2008-10-23 Sanyo Denki Co., Ltd. Counter-rotating axial-flow fax

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4855849A (en) * 1986-04-21 1989-08-08 Iomega Corporation Disk drive motor mount
TW382382U (en) * 1996-06-06 2000-02-11 Takigen Mfg Co Door lock handle assembly with a mechanism for ascertaining of locking condition
US6158985A (en) * 1998-10-07 2000-12-12 Sanyo Denki Co., Ltd. Air fan including waterproof structure
US20020025261A1 (en) * 2000-08-22 2002-02-28 Naruhiko Kudo Centrifugal fan with waterproof structure
US20080260530A1 (en) * 2007-04-18 2008-10-23 Sanyo Denki Co., Ltd. Counter-rotating axial-flow fax
CN201125876Y (en) * 2007-12-05 2008-10-01 东莞寮步新旧围永立电机厂 Waterproof and salt fog-proof cooling fan

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20130192581A1 (en) * 2011-08-05 2013-08-01 Michael Haefner Vehicle heater with integrated fan motor and control device
EP2884111A1 (en) * 2013-12-12 2015-06-17 Sanyo Denki Co., Ltd. Axial flow fan and series axial flow fan
CN104712574A (en) * 2013-12-12 2015-06-17 山洋电气株式会社 Axial flow fan and series axial flow fan
US20150167678A1 (en) * 2013-12-12 2015-06-18 Sanyo Denki Co., Ltd. Axial flow fan and series axial flow fan
US10021775B1 (en) * 2017-06-19 2018-07-10 Asia Vital Components Co., Ltd. Circuit board and fan frame connection structure
WO2021053034A1 (en) * 2019-09-16 2021-03-25 Ebm-Papst Mulfingen Gmbh & Co. Kg Connection of at least two components of a fan and method for connecting the two components of the fan to each other

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