US20100267329A1 - Return air blocking device for fan-based heat dissipation mechanism - Google Patents

Return air blocking device for fan-based heat dissipation mechanism Download PDF

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Publication number
US20100267329A1
US20100267329A1 US12424935 US42493509A US2010267329A1 US 20100267329 A1 US20100267329 A1 US 20100267329A1 US 12424935 US12424935 US 12424935 US 42493509 A US42493509 A US 42493509A US 2010267329 A1 US2010267329 A1 US 2010267329A1
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Patent type
Prior art keywords
fan
fans
hinged plates
chassis
rotatable hinged
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
US12424935
Inventor
Ta Chih CHUNG
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.)
T-WIN SYSTEMS Inc
Original Assignee
T-WIN SYSTEMS Inc
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
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    • HELECTRICITY
    • H05ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05KPRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
    • H05K7/00Constructional details common to different types of electric apparatus
    • H05K7/20Modifications to facilitate cooling, ventilating, or heating
    • H05K7/20009Modifications to facilitate cooling, ventilating, or heating using a gaseous coolant in electronic enclosures
    • H05K7/20136Forced ventilation, e.g. by fans
    • H05K7/20172Fan mounting or fan specifications
    • GPHYSICS
    • G06COMPUTING; CALCULATING; COUNTING
    • G06FELECTRIC DIGITAL DATA PROCESSING
    • G06F1/00Details not covered by groups G06F3/00 – G06F13/00 and G06F21/00
    • G06F1/16Constructional details or arrangements
    • G06F1/20Cooling means
    • GPHYSICS
    • G06COMPUTING; CALCULATING; COUNTING
    • G06FELECTRIC DIGITAL DATA PROCESSING
    • G06F11/00Error detection; Error correction; Monitoring
    • G06F11/07Responding to the occurrence of a fault, e.g. fault tolerance
    • G06F11/0796Safety measures, i.e. ensuring safe condition in the event of error, e.g. for controlling element

Abstract

A return air blocking device for a fan-based heat dissipation mechanism includes a plurality of rotatable hinged plates provided in a heat-dissipation mechanism having a plurality of fans. The rotatable hinged plates are lifted open or shut due to the presence or absence of airflow kinetic energy. When some of the fans fail, the corresponding rotatable hinged plates are shut to prevent hot exhaust from returning to and being detained in the heat dissipation mechanism.

Description

    BACKGROUND OF THE INVENTION
  • 1. Technical Field
  • The present invention relates to fan-based heat dissipation mechanisms and, more particularly, to a return air blocking device for a fan-based heat dissipation mechanism having a plurality of fans, wherein a plurality of rotatable hinged plates are provided on outer sides of the fans and are lifted open or shut by virtue of the kinetic energy of airflow. Thus, when some of the fans fail to function, hot exhaust is prevented from returning to the heat dissipation mechanism and being detained therein, so as not to interfere with the design airflow.
  • 2. Description of Related Art
  • In order to ensure highly reliable operation, information apparatuses such as industrial servers and computers are generally equipped with a fan-based mechanism including a fan configured for heat dissipation. When the fan works properly, heat dissipation is carried out as designed. However, the fan may fail unexpectedly whenever its service life comes to an end.
  • Hence, an information apparatus for industrial use typically has at least two cooling fans for backup purpose. Nevertheless, when one of the fans malfunctions (given a low chance of simultaneous breakdown of several fans), the airflow path in the apparatus will be adversely changed so that the intended heat dissipating effect is unattainable.
  • The aforesaid change of airflow path occurs because the malfunctioning fan is located at an air outlet important for heat dissipation. Once the fan stops operating, no hot air or exhaust will be discharged through the fan, thus turning the air outlet, which is usually adjacent to the other fan(s), into an air inlet for the immediately adjacent functioning fan(s). As a result, heat dissipation efficiency decreases significantly.
  • BRIEF SUMMARY OF THE INVENTION
  • According to the present invention, a return air blocking device includes rotatable hinged plates installed at air outlets of cooling fans. When the fans are not in operation, the rotatable hinged plates are shut under the action of gravity. When the fans are actuated, air blown outward by the fans will rotate and lift the rotatable hinged plates up to allow passage of airflow.
  • Should one of the fans fail, the corresponding air outlet will be turned into an air inlet, and the corresponding rotatable hinged plate will be automatically shut by the incoming airflow in addition to gravity, thus blocking the now air inlet which might otherwise allow hot exhaust to return and interfere with heat dissipation.
  • Now that the factor causing the change of airflow path is eliminated, all the other functioning fans are allowed to maintain their intended operation, at deteriorated efficiency of heat dissipation, though. In so doing, hot exhaust is prevented from returning and being detained, so as not to interfere with the otherwise fluent heat-dissipating airflow.
  • BRIEF DESCRIPTION OF THE SEVERAL VIEWS OF THE DRAWINGS
  • The invention as well as a preferred mode of use, further objectives, and advantages thereof will be best understood by referring to the following detailed description of illustrative embodiments in conjunction with the accompanying drawings, wherein:
  • FIG. 1 is a perspective view of an embodiment of the present invention;
  • FIG. 2 is a perspective view of another embodiment of the present invention; and
  • FIG. 3 is an exploded perspective view of the embodiment shown in FIG. 2.
  • DETAILED DESCRIPTION OF THE INVENTION
  • Referring to FIG. 1, a return air blocking device for a fan-based heat dissipation mechanism according to the present invention includes a plurality of rotatable hinged plates 13, 14, 15, 16, 17, 18 which are installed at outer sides of a plurality of air outlets 11, 12 of a chassis 1 and correspond in position to a plurality of fans mounted in the chassis 1.
  • When the fans in the chassis 1 work normally and blow out air, the rotatable hinged plates 13, 14, 15, 16, 17, 18 are rotated and lifted open by the kinetic energy of airflow driven by the fans, thus allowing hot exhaust to be discharged. When one of the fans, such as the one corresponding in position to the rotatable hinged plates 17, 18, fails, the rotatable hinged plates 17, 18 drop automatically and are thus shut due to gravity and absence of the airflow kinetic energy. In consequence, external air or hot exhaust discharged from the neighboring fan is prevented from being sucked into and detained in the chassis 1, which might otherwise result in obstruction of the heat-dissipating airflow.
  • Referring to FIG. 2 and FIG. 3, the return air blocking device for a fan-based hear dissipation mechanism according to the present invention is implemented as one or several rotatable hinged plates 13, 14 installed at an air outlet 21 of a fan frame 2 configured for receiving a blower fan 22 mounted securely therein. After the mounting of the blower fan 22 in the fan frame 2 and the installation of the rotatable hinged plates 13, 14 at the air outlet 21 of the fan frame 2, the fan frame 2 can be conveniently installed on the chassis 1 for use.

Claims (2)

  1. 1. A return air blocking device for a fan-based heat dissipation mechanism, essentially comprising a plurality of rotatable hinged plates provided at outer sides of a plurality of air outlets of a chassis such that the rotatable hinged plates correspond in position to a plurality of fans mounted in the chassis, wherein when all the fans in the chassis are in normal operation, all the rotatable hinged plates are rotated and thus lifted open by kinetic energy of airflow driven by the fans, wherein when one of the fans fails, at least a corresponding one of the rotatable hinged plates drops automatically due to gravity so as to be shut, thereby preventing external air or hot exhaust discharged via a neighboring said fan from being sucked into the chassis.
  2. 2. The return air blocking device of claim 1, wherein at least one of the rotatable hinged plates is provided at an air outlet of a fan frame configured for receiving a blower fan mounted securely in the fan frame, and the fan frame which is mounted securely with the blower fan and whose said air outlet is provided with the at least one rotatable hinged plate is conveniently installed on the chassis.
US12424935 2009-04-16 2009-04-16 Return air blocking device for fan-based heat dissipation mechanism Abandoned US20100267329A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
US12424935 US20100267329A1 (en) 2009-04-16 2009-04-16 Return air blocking device for fan-based heat dissipation mechanism

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US12424935 US20100267329A1 (en) 2009-04-16 2009-04-16 Return air blocking device for fan-based heat dissipation mechanism

Publications (1)

Publication Number Publication Date
US20100267329A1 true true US20100267329A1 (en) 2010-10-21

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US12424935 Abandoned US20100267329A1 (en) 2009-04-16 2009-04-16 Return air blocking device for fan-based heat dissipation mechanism

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Citations (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3479947A (en) * 1968-01-15 1969-11-25 Chore Time Equipment Ventilator unit
US6011689A (en) * 1998-04-27 2000-01-04 Sun Microsystems, Inc. Computer component cooling fan closure device and method thereof
US6031717A (en) * 1999-04-13 2000-02-29 Dell Usa, L.P. Back flow limiting device for failed redundant parallel fan
US6042348A (en) * 1998-05-11 2000-03-28 Lucent Technologies Inc. Protective shutter assembly for a forced air cooling system
US6181557B1 (en) * 1999-10-29 2001-01-30 Motorola, Inc. Electronic component, method of cooling, and damper therefor
US6587340B2 (en) * 2001-04-10 2003-07-01 Sun Microsystems, Inc. Maintaining cooling efficiency during air mover failure
US6688965B1 (en) * 2002-11-27 2004-02-10 International Business Machines Corporation Invertible back flow damper for an air moving device
US6710240B1 (en) * 2003-04-24 2004-03-23 Datech Technology Co., Ltd. Register incorporating a toggle-joint mechanism between open and closed position
US7236361B2 (en) * 2003-12-22 2007-06-26 Emc Corporation Fan assembly for installing and removing fans individually and collectively
US7345875B2 (en) * 2005-06-20 2008-03-18 Emerson Network Power, Energy Systems, North America, Inc. Electromagnet-assisted ventilation cover for an electronic equipment enclosure
US7416481B2 (en) * 2006-03-06 2008-08-26 International Business Machines Corporation Blower exhaust backflow damper
US20080310103A1 (en) * 2007-06-04 2008-12-18 Della Fiora Troy A Air backflow prevention in an enclosure
US7952870B1 (en) * 2010-02-02 2011-05-31 Hong Fu Jin Precision Industry (Shenzhen) Co., Ltd. Computer enclosure

Patent Citations (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3479947A (en) * 1968-01-15 1969-11-25 Chore Time Equipment Ventilator unit
US6011689A (en) * 1998-04-27 2000-01-04 Sun Microsystems, Inc. Computer component cooling fan closure device and method thereof
US6042348A (en) * 1998-05-11 2000-03-28 Lucent Technologies Inc. Protective shutter assembly for a forced air cooling system
US6031717A (en) * 1999-04-13 2000-02-29 Dell Usa, L.P. Back flow limiting device for failed redundant parallel fan
US6181557B1 (en) * 1999-10-29 2001-01-30 Motorola, Inc. Electronic component, method of cooling, and damper therefor
US6587340B2 (en) * 2001-04-10 2003-07-01 Sun Microsystems, Inc. Maintaining cooling efficiency during air mover failure
US6688965B1 (en) * 2002-11-27 2004-02-10 International Business Machines Corporation Invertible back flow damper for an air moving device
US6710240B1 (en) * 2003-04-24 2004-03-23 Datech Technology Co., Ltd. Register incorporating a toggle-joint mechanism between open and closed position
US7236361B2 (en) * 2003-12-22 2007-06-26 Emc Corporation Fan assembly for installing and removing fans individually and collectively
US7345875B2 (en) * 2005-06-20 2008-03-18 Emerson Network Power, Energy Systems, North America, Inc. Electromagnet-assisted ventilation cover for an electronic equipment enclosure
US7416481B2 (en) * 2006-03-06 2008-08-26 International Business Machines Corporation Blower exhaust backflow damper
US20080310103A1 (en) * 2007-06-04 2008-12-18 Della Fiora Troy A Air backflow prevention in an enclosure
US7952870B1 (en) * 2010-02-02 2011-05-31 Hong Fu Jin Precision Industry (Shenzhen) Co., Ltd. Computer enclosure

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Legal Events

Date Code Title Description
AS Assignment

Owner name: T-WIN SYSTEMS, INC., TAIWAN

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:CHUNG, TA CHIH;REEL/FRAME:022555/0713

Effective date: 20090313