US20100071877A1 - Reducing accumulation of dust particles on a heat dissipating arrangement - Google Patents

Reducing accumulation of dust particles on a heat dissipating arrangement Download PDF

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Publication number
US20100071877A1
US20100071877A1 US12/560,196 US56019609A US2010071877A1 US 20100071877 A1 US20100071877 A1 US 20100071877A1 US 56019609 A US56019609 A US 56019609A US 2010071877 A1 US2010071877 A1 US 2010071877A1
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United States
Prior art keywords
fan
pulsating
angle
air
heat exchanger
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
US12/560,196
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English (en)
Inventor
Nitin Goel
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.)
Intel Corp
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Intel Corp
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Filing date
Publication date
Application filed by Intel Corp filed Critical Intel Corp
Publication of US20100071877A1 publication Critical patent/US20100071877A1/en
Assigned to INTEL CORPORATION reassignment INTEL CORPORATION ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: GOEL, NITIN
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
    • F04D27/00—Control, e.g. regulation, of pumps, pumping installations or pumping systems specially adapted for elastic fluids
    • F04D27/004—Control, e.g. regulation, of pumps, pumping installations or pumping systems specially adapted for elastic fluids by varying driving speed
    • 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
    • F04D29/70—Suction grids; Strainers; Dust separation; Cleaning
    • F04D29/701—Suction grids; Strainers; Dust separation; Cleaning especially adapted for elastic fluid pumps
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
    • H05K7/00—Constructional details common to different types of electric apparatus
    • H05K7/20—Modifications to facilitate cooling, ventilating, or heating
    • H05K7/20009—Modifications to facilitate cooling, ventilating, or heating using a gaseous coolant in electronic enclosures
    • H05K7/20136—Forced ventilation, e.g. by fans
    • H05K7/20172—Fan mounting or fan specifications
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
    • Y02B30/70—Efficient control or regulation technologies, e.g. for control of refrigerant flow, motor or heating

Definitions

  • a system including an electronic or an automobile or an air conditioning system may comprise heat generating elements.
  • a microprocessor or a graphics device, or any other such device may generate heat.
  • the generated heat may be dissipated using a heat dissipation arrangement.
  • the heat dissipation arrangement may comprise a combination of a fan and a heat exchanger or air cooling devices.
  • the heat generated by the devices may be dissipated by causing air to flow over the heated generating device. While the air is flowing, the heat that is generated may be transferred thus dissipating the heat.
  • a fan comprises blades coupled to a member provisioned along the axis of the fan and rotation of the blades cause the air flow.
  • heat exchangers comprising highly conducting material may be provisioned proximate to the fan and such an arrangement may dissipate the heat at a faster rate.
  • the air flow may cause accumulation of numerous dust particles over the heat exchanger and fan blade surfaces. Over a period of time such accumulation of dust particles may form an insulating and opaque layer, which may hinder the passage of air. Such a condition may reduce the amount of heat dissipated, which may cause performance, ergonomic, and such other similar issues.
  • FIG. 1 illustrates an arrangement 110 and 150 comprising a pulsating axial fan, which rotates in a first direction and a second direction, respectively, to reduce accumulation of dust on heat exchangers in accordance with an embodiment.
  • FIG. 2 illustrates a line diagram 210 and 250 that depicts the direction of air-flow as the pulsating axial fan rotates in the first and second direction, respectively.
  • FIG. 3 depicts a picture of the heat dissipation arrangement 110 .
  • FIG. 4 depicts a picture of the heat dissipation arrangement 150 comprising a pulsating axial fan may rotate in both the first and the second direction.
  • FIG. 5 illustrates an arrangement 510 and 550 comprising a pulsating centrifugal fan, which rotates in a third and a fourth direction, respectively, to reduce accumulation of dust on heat exchangers in accordance with an embodiment.
  • FIG. 6 illustrates a line diagram 610 and 650 that depicts the direction of impingement as the pulsating centrifugal fan rotates in the third and fourth direction, respectively.
  • FIG. 7 depicts a picture of the heat dissipation arrangement 510 .
  • FIG. 8 depicts a picture of the heat dissipation arrangement 550 comprising a pulsating centrifugal fan may rotate in both the third and the fourth direction.
  • FIG. 9 illustrates a computer system 900 in which the pulsating fan arrangement is used to reduce accumulation of dust on heat exchangers in accordance with an embodiment.
  • references in the specification to “one embodiment”, “an embodiment”, “an example embodiment”, indicate that the embodiment described may include a particular feature, structure, or characteristic, but every embodiment may not necessarily include the particular feature, structure, or characteristic. Moreover, such phrases are not necessarily referring to the same embodiment. Further, when a particular feature, structure, or characteristic is described in connection with an embodiment, it is submitted that it is within the knowledge of one skilled in the art to affect such feature, structure, or characteristic in connection with other embodiments whether or not explicitly described.
  • FIG. 1 An embodiment of a pulsating axial fan used in a heat dissipation arrangement 110 and 150 to reduce accumulation of dust on a heat exchanger is illustrated in FIG. 1 .
  • the arrangement 110 comprises a pulsating axial fan 120 and a heat exchanger 130 .
  • the pulsating axial fan 120 may rotate in a direction 135 and the direction 105 and 106 may represent the direction of in-flow and out-flow of air, respectively.
  • the air that is transferred along the axis (direction 105 ) of the pulsating axial fan 120 may comprise dust particles.
  • the air flowing along the direction 105 may carry the dust particles towards the blades of the pulsating axial fan 120 and the heat-exchanger 130 .
  • the dust particles may get accumulated on blades of the pulsating axial fan 120 and the heat-exchanger 130 .
  • the accumulation of dust particles may form a dust layer 140 .
  • the dust layer 140 may reduce the passage of air and may thus decrease the amount of heat dissipated.
  • decrease in the dissipation of heat may increase the thermal levels of a heat generating element and the performance of the heat generating element may thus degrade.
  • the picture of the heat dissipation arrangement 110 is depicted in FIG. 3 , which illustrates accumulation of dust particles 340 on blades of the pulsating axial fan 120 and the heat exchanger 370 .
  • the dust particles may comprise minute solid particles or fiber media or such other similar elements.
  • the dust particles may occur from various sources such as soil, human skin cells, plant pollen, animal hair, textile fibers, paper fibers, and such other particles.
  • the heat dissipation arrangement 150 may comprise the pulsating axial fan 120 and the heat exchanger 130 .
  • the direction of rotation of the pulsating axial fan 120 may be reversed as depicted by the second direction 185 .
  • the pulsating axial fan 120 may rotate in a first direction for a substantial duration of time and may also, intermittently, rotate in the second direction, which is in a reverse direction to the first direction.
  • the pulsating axial fan 120 rotating in the second direction 185 may create suction pressure along the direction 155 - 156 .
  • the suction pressure created by rotation of the pulsating axial fan 120 may dislodge the dust particles of the dust layer 140 .
  • dislodging of the dust particles from the dust layer 140 may reduce the accumulation of dust particles on blades of the pulsating axial fan 120 and the heat-exchanger 130 .
  • the picture of the heat dissipation arrangement 150 comprising a pulsating axial fan may rotate in both the first and the second direction is depicted in FIG. 4 .
  • the picture of FIG. 4 illustrates reduction in the accumulation of dust particles 340 while the pulsating axial fan 310 rotates, periodically, in the first direction 135 and the second direction 185 .
  • the duration in which the pulsating axial fan 310 rotates in the first direction 135 may be substantially more than the duration in which the pulsating axial fan 310 rotates in the second direction 185 .
  • dislodging of the dust particles may keep the heat-exchangers substantially free from the dust layer 340 .
  • Such an approach may allow the heat generating devices to perform at an expected performance level.
  • such an approach may substantially avoid the hindrance to heat dissipation.
  • avoiding hindrance to heat dissipation may also avoid overheating of the heat generating device thus maintaining the thermal levels of the devices within the ergonomic limits.
  • Such an approach may also maintain the cleanliness of the surfaces of blades of the pulsating axial fan 310 and the heat exchanger 370 thus improving the aesthetic aspects of the arrangement.
  • the pulsating axial fan 310 may be rotated in the first direction of rotation 135 .
  • the pulsating axial fan 310 may be rotated in the second direction 185 , which is in a direction reverse to the first direction 135 , for a short duration of time on occurrence of specific events.
  • the specific events may comprise elapse of a specified time duration during which the pulsating axial fan 310 may rotate in the first direction 135 or if the thermal levels of the heat generating device exceeds a pre-set level, or start-up and shut down events and such other similar events.
  • time tracking devices may be used to track the time and temperature sensors may be used to sense the temperature of the heat generating devices.
  • the pulsating axial fan 120 rotating in the direction 135 may cause the air to flow along the direction 105 - 106 , which may contribute to accumulation of dust particles on blades of the pulsating axial fan 120 and the heat-exchanger 130 .
  • the pulsating axial fan 120 may cause suction of air along the direction 155 - 156 , which may be substantially opposite to the direction 105 - 106 .
  • the heat dissipation arrangement 150 may reduce the accumulation of dust particles on blades of the pulsating axial fan 120 and the heat-exchanger 130 .
  • FIG. 5 An embodiment of a centrifugal pulsating fan used in a heat dissipation arrangement 510 and 550 to reduce accumulation of dust particles on blades of a pulsating centrifugal fan and a heat exchanger is illustrated in FIG. 5 .
  • the arrangement 510 comprises a heat exchanger 520 and a pulsating centrifugal fan 530 .
  • the pulsating centrifugal fan 530 may rotate in the third direction 515 .
  • the direction 505 may represent the direction of in-flow of air and the direction 506 may represent out-flow of air.
  • the direction 506 may be at an angle of about 90 degrees to the direction 505 .
  • the rotation of the pulsating centrifugal fan 530 in the direction 515 may cause air to impinge the heat-exchanger 520 .
  • the rotation of the pulsating centrifugal fan 530 may cause the air to impinge the heat-exchanger 520 in the impingement direction 525 .
  • the air impinging the heat-exchanger 520 in the impingement direction 525 may cause substantial amount of dust to accumulate at one end of the heat-exchanger 520 and blades of the fan 530 .
  • accumulation of dust particles on the heat-exchanger 520 may form a dust layer 540 on blades of the fan 530 and the heat-exchanger 520 .
  • the picture of the heat dissipation arrangement 510 is depicted in FIG. 7 , which illustrates accumulation of dust particles 740 on blades of a pulsating centrifugal fan 710 and the heat exchanger 770 .
  • the direction of rotation of the pulsating centrifugal fan 530 may be reversed.
  • the fourth direction 565 may be substantially opposite to that of the third direction 515 .
  • the air flow may impinge the heat-exchanger 520 in an impingement direction 575 .
  • the impingement direction 575 may make an angle theta- 1 (‘ ⁇ 1 ’) with the impingement direction 525 .
  • the air flowing along the impingement direction 575 may dislodge the dust particles from the blades of the fan 530 and the heat-exchanger 520 .
  • rotating the centrifugal fan 530 in the fourth direction 565 may reduce accumulation of dust particles on blades of the fan 530 and the heat exchanger 520 .
  • the picture of the heat dissipation arrangement 550 comprising a pulsating centrifugal fan may rotate in both the third and the fourth direction is depicted in FIG. 8 . In one embodiment, the picture of FIG.
  • the duration in which the pulsating centrifugal fan 710 rotates in the third direction 515 may be substantially more than the duration in which the pulsating centrifugal fan 710 rotates in the fourth direction 565 .
  • FIG. 6 A line diagram depicting the impingement directions in which the air flow occurs with a change in the direction of rotation of the pulsating centrifugal fan 530 is illustrated in FIG. 6 .
  • the pulsating centrifugal fan 530 may rotate in the third direction 515 and cause the air inflow 505 to impinge the heat exchanger 520 in the impingement direction 525 .
  • the pulsating centrifugal fan 530 may rotate in the third direction 515 and cause the air inflow in the direction 505 to impinge the heat exchanger 520 in an impingement direction 526 .
  • the impingement of air in the direction 525 and 526 may occur at a first angle and a second angle, respectively.
  • the impinging of air in the impingement direction 525 and/or 526 may cause the dust particles in the air to accumulate on blades of the fan 530 and the heat-exchanger 520 .
  • the pulsating centrifugal fan 530 may rotate in the fourth direction 565 , which may be opposite to the third direction 515 .
  • the rotation of the pulsating centrifugal fan 530 in the direction 565 may cause the air to impinge the heat exchanger 520 in the impingement direction 575 .
  • the pulsating centrifugal fan 530 may rotate in the fourth direction 565 and cause the air inflow 505 to impinge the heat exchanger 520 in a direction 576 .
  • the impingement of air in the direction 575 and 576 may occur at a third angle and a fourth angle, respectively.
  • the direction 575 may form an angle theta- 1 ( ⁇ 1 ) with the direction 525 .
  • the angle theta- 1 may represent an obtuse angle (greater than 90 degrees).
  • the direction 576 may form an angle theta- 2 ( ⁇ 2 ) with the direction 576 .
  • the angle theta- 2 ( ⁇ 2 ) may represent an acute angle (lesser than 90 degrees).
  • the dust particles accumulated on the heat exchanger 520 may be dislodged due to the flow of air in the impingement direction 575 and/or 576 .
  • FIG. 9 An embodiment of a computer system 900 comprising the heat dissipation arrangement including a pulsating axial or centrifugal fan is illustrated in FIG. 9 .
  • the computer system 900 may comprise a processor 910 , a cooling unit 930 , a memory 940 , a graphics device 950 , a cooling unit 960 , a controller hub 970 , and I/O devices 980 .
  • memory 940 may be used to store instructions and data values that may be used by the processor 910 .
  • the controller hub 970 may provide an interface between the processor 910 and the memory 940 and also between the processor 910 and the I/O devices 980 .
  • a cooling unit may be provided proximate to the components from which heat may needs to be dissipated.
  • the cooling unit 930 and 960 may be provided proximate to the processor 910 and the graphics device 950 , respectively.
  • the processor 910 may include a single core, or a dual core, or a multi-core processor. In one embodiment, the processor 910 may represent a heat generating device and the heat generated by the processor 910 may be dissipated using the cooling unit 930 .
  • the cooling unit 930 may comprise a fan 935 and a heat exchanger HE 938 .
  • the fan 935 may include a pulsating axial or a pulsating centrifugal fan, which may be rotated in one direction for a substantial amount of time and may be rotated in an opposite direction for a short duration of time.
  • the change of the direction of rotation of the pulsating fan 930 from one direction to the opposite direction may be based on occurrence of an event such as elapse of pre-set time duration, thermal levels of the processor 910 exceeding of a pre-set thermal level, or the processing load of the processor 910 exceeding a pre-set workload value.
  • the reversal of the direction of rotation may dislodge the dust particles and may thus reduce the accumulation of dust particles on the fan 935 and the heat exchanger HE 938 or any other surface proximate to the cooling unit 930 .
  • such an approach may reduce the chances of occurrence of the problems associated with accumulation of dust particles on the fan 935 and the HE 938 and other surfaces proximate to the cooling unit 930 .
  • the graphics device 950 may include a graphics controller, display controller, and such other similar units that may perform processing of picture data, which may need large processing resources. In one embodiment, the graphics device 950 may thus generate heat, which may need to be dissipated to conserve the performance levels.
  • the cooing unit 960 which may be placed proximate to the graphics device 950 may dissipate the heat generated by the graphics device 950 .
  • the cooling unit 960 may comprise a fan 965 and a heat exchanger HE 968 .
  • the fan 965 may comprise a pulsating axial or a pulsating centrifugal fan, which while rotating in one direction, may cause accumulation of dust particles on the fan 965 and the HE 968 or any other surface proximate to the cooling unit 960 .
  • the pulsating fan 965 may be rotated in a reverse direction to dislodge the dust particles accumulated on the HE 968 . Such an approach may enable heat dissipation and performance levels to be maintained.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)
  • Cooling Or The Like Of Electrical Apparatus (AREA)
  • Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
  • Cooling Or The Like Of Semiconductors Or Solid State Devices (AREA)
US12/560,196 2008-09-19 2009-09-15 Reducing accumulation of dust particles on a heat dissipating arrangement Abandoned US20100071877A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IN2198DE2008 2008-09-19
IN2198/DEL/2008 2008-09-19

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US20100071877A1 true US20100071877A1 (en) 2010-03-25

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US12/560,196 Abandoned US20100071877A1 (en) 2008-09-19 2009-09-15 Reducing accumulation of dust particles on a heat dissipating arrangement

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US (1) US20100071877A1 (zh)
JP (1) JP2010116915A (zh)
CN (1) CN101783185B (zh)
DE (1) DE102009042138A1 (zh)
TW (1) TWI444538B (zh)

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8899066B2 (en) 2011-09-07 2014-12-02 General Electric Company System for environmental protection of a heat exchanger
CN104534072A (zh) * 2014-12-24 2015-04-22 大连尚能科技发展有限公司 一种齿轮箱润滑冷却系统的冷却及除尘方法
TWI487841B (zh) * 2011-05-12 2015-06-11 Adda Corp 散熱風扇
US20160047609A1 (en) * 2014-08-18 2016-02-18 Atieva, Inc. Self-Cleaning Fan Assembly
CN107084150A (zh) * 2016-11-10 2017-08-22 上海沃克通用设备有限公司 耐高温风机用轴
US11022131B2 (en) * 2010-07-29 2021-06-01 Dell Products L.P. Dual operation centrifugal fan apparatus and methods of using same
US11162507B2 (en) 2019-01-18 2021-11-02 Deere & Company Variable pitch fan pitch limit
US20230031171A1 (en) * 2009-05-06 2023-02-02 Munters Corporation Fan for use in agriculture

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CN102672513A (zh) * 2012-05-16 2012-09-19 神龙汽车有限公司 机床刀具退屑方法
CN105545785B (zh) * 2014-12-24 2017-12-12 大连尚能科技发展有限公司 一种冷却器风扇自动除尘方法
CN104607417B (zh) * 2014-12-24 2016-08-24 大连尚能科技发展有限公司 一种冷却器油膜的清除方法
CN104564769B (zh) * 2015-01-28 2017-01-18 合肥联宝信息技术有限公司 一种风扇自动除尘控制方法及装置
DE102015122132A1 (de) * 2015-12-17 2017-06-22 Ebm-Papst Mulfingen Gmbh & Co. Kg Kantenberandung eines Rotationselements und Gebläserad
CN111336128A (zh) * 2020-04-09 2020-06-26 刘兴丹 一种自除尘风扇的方法、装置

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JPH02163498A (ja) * 1988-12-19 1990-06-22 Matsushita Electric Ind Co Ltd 送風機制御装置
JPH03123589A (ja) * 1989-10-06 1991-05-27 Mitsubishi Heavy Ind Ltd ドライクリーナの乾燥風量調整方法
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US5559674A (en) * 1993-03-19 1996-09-24 Fujitsu Limited Heat sink and mounting structure for heat sink
US20020079086A1 (en) * 2000-12-27 2002-06-27 Delta Electronics Inc. Embedded centrifugal cooling device
US6532151B2 (en) * 2001-01-31 2003-03-11 Hewlett-Packard Company Method and apparatus for clearing obstructions from computer system cooling fans
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Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20230031171A1 (en) * 2009-05-06 2023-02-02 Munters Corporation Fan for use in agriculture
US12070010B2 (en) * 2009-05-06 2024-08-27 Munters Corporation Fan for use in agriculture
US11022131B2 (en) * 2010-07-29 2021-06-01 Dell Products L.P. Dual operation centrifugal fan apparatus and methods of using same
TWI487841B (zh) * 2011-05-12 2015-06-11 Adda Corp 散熱風扇
US8899066B2 (en) 2011-09-07 2014-12-02 General Electric Company System for environmental protection of a heat exchanger
US20160047609A1 (en) * 2014-08-18 2016-02-18 Atieva, Inc. Self-Cleaning Fan Assembly
US20160377359A1 (en) * 2014-08-18 2016-12-29 Atieva, Inc. Method of Cleaning a Vehicle Heat Exchanger
US9625223B2 (en) * 2014-08-18 2017-04-18 Atieva, Inc. Self-cleaning fan assembly
US9989323B2 (en) * 2014-08-18 2018-06-05 Atieva, Inc. Method of cleaning a vehicle heat exchanger
CN104534072A (zh) * 2014-12-24 2015-04-22 大连尚能科技发展有限公司 一种齿轮箱润滑冷却系统的冷却及除尘方法
CN107084150A (zh) * 2016-11-10 2017-08-22 上海沃克通用设备有限公司 耐高温风机用轴
US11162507B2 (en) 2019-01-18 2021-11-02 Deere & Company Variable pitch fan pitch limit

Also Published As

Publication number Publication date
JP2010116915A (ja) 2010-05-27
CN101783185B (zh) 2013-07-17
TWI444538B (zh) 2014-07-11
CN101783185A (zh) 2010-07-21
DE102009042138A1 (de) 2010-04-29
TW201026960A (en) 2010-07-16

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