WO1994012282A1 - Cooling method and apparatus - Google Patents

Cooling method and apparatus Download PDF

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Publication number
WO1994012282A1
WO1994012282A1 PCT/US1993/011378 US9311378W WO9412282A1 WO 1994012282 A1 WO1994012282 A1 WO 1994012282A1 US 9311378 W US9311378 W US 9311378W WO 9412282 A1 WO9412282 A1 WO 9412282A1
Authority
WO
WIPO (PCT)
Prior art keywords
heat
cathode
generating body
ion wind
wing sections
Prior art date
Application number
PCT/US1993/011378
Other languages
French (fr)
Inventor
Yechiel Spector
Eran Sher
Shaul Serero
Original Assignee
Spectrex Inc.
Spectronix 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
Application filed by Spectrex Inc., Spectronix Ltd. filed Critical Spectrex Inc.
Priority to AU56754/94A priority Critical patent/AU5675494A/en
Publication of WO1994012282A1 publication Critical patent/WO1994012282A1/en

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01T—SPARK GAPS; OVERVOLTAGE ARRESTERS USING SPARK GAPS; SPARKING PLUGS; CORONA DEVICES; GENERATING IONS TO BE INTRODUCED INTO NON-ENCLOSED GASES
    • H01T23/00—Apparatus for generating ions to be introduced into non-enclosed gases, e.g. into the atmosphere
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
    • H01L23/00—Details of semiconductor or other solid state devices
    • H01L23/34—Arrangements for cooling, heating, ventilating or temperature compensation ; Temperature sensing arrangements
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
    • H01L2924/00—Indexing scheme for arrangements or methods for connecting or disconnecting semiconductor or solid-state bodies as covered by H01L24/00
    • H01L2924/0001—Technical content checked by a classifier
    • H01L2924/0002—Not covered by any one of groups H01L24/00, H01L24/00 and H01L2224/00

Definitions

  • the present invention relates to a method, and also to apparatus for cooling a heat-generating body.
  • the invention is especially useful for cooling electrical devices, such as power transistors, hybrid electronic devices, electrical power supplies, and the like, and is therefore described below with respect to such application, but it will be appreciated that the invention could advantageously be used in other applications as well.
  • the gas near the anode breaks down at a voltage less than the spark-breakdown voltage for that gap length.
  • This local breakdown is in the form of a glow discharge, which at atmospheric pressure is usually called corona.
  • Positive ions are formed at the anode and are accelerated towards the cathode. Collisions between these ions and neutral gas molecules transfer momentum to the bulk gas, resulting in a directional body force, called an ion wind.
  • the present application is directed to the use of such an ion wind for cooling a heat-generating body.
  • a method of cooling a heat-generating body comprising: generating an ion wind by corona discharge; and directing the ion wind towards the heat-generating body to dissipate substantial quantities of heat therefrom by convection.
  • the corona discharge is produced between a pointed anode and a cathode.
  • the corona discharge is produced between a wire anode and a cathode of an electrode assembly.
  • the cathode includes a planar section formed with a longitudinally-extending rectangular slot having two wing sections extending along the opposite longitudinal edges of the slot, the wing sections being angled towards, but terminating short of, each other; the wire anode being located midway between the wing sections such that the wing sections direct the ion wind towards the heat-generating body.
  • a further embodiment is described, wherein there are a plurality of the electrode assemblies extending along one orthogonal axis and spaced from each other along a second orthogonal axis to generate an ion wind along the third orthogonal axis.
  • the invention also provides apparatus for cooling a heat-generating body according to above method.
  • the invention could be used for cooling various types of heat-generating bodies, including power transistors or hybrid electronic devices mounted on a printed circuit board, an electronic power supplies, etc.
  • Fig. 1 illustrates one form of apparatus constructed in accordance with the present invention
  • Fig. 2 is a side elevational view of the apparatus of Fig. 1 ;
  • Fig. 3 illustrates a second form of apparatus constructed in accordance with the present invention
  • Fig. 4 is a side elevational view of a part of the apparatus of Fig. 3;
  • Fig. 5 illustrates a further form of apparatus constructed in accordance with the present invention
  • Fig. 6 is a fragmentary view of a portion of the apparatus of Fig. 5 to better show internal structure; and Fig. 7 illustrates a further form of apparatus constructed in accordance with the present invention.
  • Figs. 1 and 2 illustrate the invention as applied for cooling a power transistor 2 mounted on a printed circuit board 3 by a plurality of spacers 4.
  • the power transistor 2 is cooled by an ion wind generated by corona discharge produced between an anode electrode 5 and a cathode electrode 6 mounted adjacent to the power transistor 2.
  • the anode electrode 5 includes a first leg 5a fixed to the printed circuit board to extend perpendicularly thereto, and a second leg 5b bent perpendicularly to leg 5a in the direction of the cathode 6 and terminating in a pointed tip 5c.
  • the cathode 6 includes a mounting leg 6a extending parallel to the printed circuit board 3 and mounted directly thereto.
  • Cathode 6 further includes a planar section 6b extending perpendicularly to the printed circuit board and formed with an enlarged opening 6c coaxial with leg 5b and pointed tip 5c of the anode 5.
  • These ions are accelerated towards the cathode 6 and produce an ion wind, as shown by arrow 7 in Fig. 2, in the direction of the power transistor 2.
  • This ion wind causes heat dissipation by convection from the power transistor 2 , thereby cooling it.
  • the apparatus of Figs. 1 and 2 may thus be used for cooling individual power transistors mounted on a printed circuit board.
  • one electrode assembly including the anode 5 and cathode 6 may be provided for and adjacent to each power transistor to be cooled.
  • Figs. 3 and 4 illustrate the invention also applied for cooling a power transistor, but is particularly applicable for larger size power transistors which generate considerable quantities of heat.
  • the power transistor 10 illustrated in Fig. 3 is mounted on a heat sink 11 carried by the printed circuit board 12.
  • the electrode assembly producing the ion wind includes a cathode 13 of channel configuration and an anode 14 in the form of a wire both carried by a bracket 15 mounted to the printed circuit board 12 in alignment with the power transistor 10 and the heat sink 11 to be cooled.
  • the cathode 13 includes a main planar section 13a formed with a longitudinally-extending rectangular slot 13b, two wing sections 13c, 13d along the opposite longitudinal edges of the slot, and a mounting section 13e fixed to the printed circuit board 12.
  • the wing sections 13c, 13d are angled towards, but terminate short of, each other to produce an airgap 14 between the confronting edges of the two wing sections.
  • the anode 15 is in the form of a wire secured between two terminals 15a, 15b and extending along the slot 13b of the main cathode section 13a between its wing sections 13c, 13d.
  • the printed circuit board 12 further includes connectors, shown schematically at 17, for making the electrical connections to the power transistor 10, as well as to the electrodes 13 and 15.
  • Figs. 5 and 6 illustrate the invention as applied for cooling a power hybrid regulator 21 mounted on a chassis or printed circuit board 22 by means of a plurality of spacers 23.
  • the ion wind for cooling the regulator 21 is produced by an electrode assembly including a cathode 24 and a pair of anodes 25, 26, mounted between the chassis or printed circuit board 22 and the power hybrid regulator 21 to be cooled.
  • the cathode 24 is of planar configuration and is mounted to the chassis or printed circuit board 22 by a spacer 27.
  • the cathode 24 is formed with a pair of circular openings 24a, 24b, each receiving the pointed tip of the anode electrodes 25, 26 and coaxial therewith, as described above with respect to Figs. 1 and 2.
  • an ion wind is produced by each of the anodes 25, 26 and the common cathode 24, and these ions winds are directed towards the power hybrid regulator 21 to dissipate the heat therefrom by convection, as described above with respect to Figs. 1 and 2.
  • Fig. 7 illustrates a further application of the invention for cooling an electrical device, such as a power supply, housed within a housing 30.
  • one end of the housing 30 is formed with an opening 31 occupied by an electrode assembly including a cathode 32 and a plurality of anodes 33, 34, 35, etc.
  • the cathode 32 is common to all of the anodes.
  • the common cathode 32 includes a main planar section 32a formed with a plurality of longitudinally-extending rectangular slots 32b, one for each of the anodes 33-35.
  • the common cathode 32 is further formed with a pair of wing sections 32c, 32d extending along the opposite longitudinal edges of each slot 32b.
  • the wing sections are angled towards each other but terminate short of each other, similar to the arrangement illustrated in Figs. 3 and 4, such that they accelerate the positive ions produced by the respective anodes 33-35 and direct them into the interior of housing 30 so as to dissipate the heat generated by the electrical device within the housing through the outlet opening 37 formed at the opposite end of the housing.
  • the anodes 33-35 form, with their respective cathode wing sections 32c, 32d, a plurality of electrode assemblies extending along one orthogonal axis (shown at A ) and spaced from each other along a second orthogonal axis (A ) to generate an ion wind along the third othogonal axis (A ) .
  • the illustrated apparatus and particularly that illustrated in Fig. 7, is especially useful for cooling electrical power supplies or components thereof. It will be appreciated, however, that the invention could advantageously be used with respect to other type of heat- generating bodies, for example bodies wherein the heat is generated by friction, fuel combustion, etc.

Abstract

A method for cooling a heat-generating body (2), particularly for cooling electrical devices, such as power supplies, and the like. The method comprises generating an ion wind by corona discharge, and directing the ion wind toward the heat-generating body (2), to dissipate substantial quantities of heat therefrom by convection. An apparatus (5, 6), comprising an electrode assembly (5c, 6c), for use in the method is also described.

Description

COOLING METHOD AND APPARATUS The present invention relates to a method, and also to apparatus for cooling a heat-generating body. The invention is especially useful for cooling electrical devices, such as power transistors, hybrid electronic devices, electrical power supplies, and the like, and is therefore described below with respect to such application, but it will be appreciated that the invention could advantageously be used in other applications as well.
When a strong electrical field is applied in a gap between a sharply curved electrode surface serving as an anode, and another electrode surface of less curvature, (e.g., planar) serving as a cathode, the gas near the anode breaks down at a voltage less than the spark-breakdown voltage for that gap length. This local breakdown is in the form of a glow discharge, which at atmospheric pressure is usually called corona. Positive ions are formed at the anode and are accelerated towards the cathode. Collisions between these ions and neutral gas molecules transfer momentum to the bulk gas, resulting in a directional body force, called an ion wind. Under normal conditions, this kind of electro-fluid-dynamics (EPD) device can produce wind velocities up to 8-12 meters per second. These air displacements can be highly localized according to the specific electrode configuration. Our Israel Patent Applications 92951 , 94367 and 95543 (corresponding to US Patent No.5,090,482) disclose the use of such an ion wind for extinguishing a fire.
The present application is directed to the use of such an ion wind for cooling a heat-generating body.
According to one aspect of the present invention, there is provided a method of cooling a heat-generating body comprising: generating an ion wind by corona discharge; and directing the ion wind towards the heat-generating body to dissipate substantial quantities of heat therefrom by convection.
According to one described embodiment, the corona discharge is produced between a pointed anode and a cathode.
According to a second preferred embodiment of the invention described below, the corona discharge is produced between a wire anode and a cathode of an electrode assembly. In this described embodiment, the cathode includes a planar section formed with a longitudinally-extending rectangular slot having two wing sections extending along the opposite longitudinal edges of the slot, the wing sections being angled towards, but terminating short of, each other; the wire anode being located midway between the wing sections such that the wing sections direct the ion wind towards the heat-generating body.
A further embodiment is described, wherein there are a plurality of the electrode assemblies extending along one orthogonal axis and spaced from each other along a second orthogonal axis to generate an ion wind along the third orthogonal axis.
The invention also provides apparatus for cooling a heat-generating body according to above method.
As will be described below, the invention could be used for cooling various types of heat-generating bodies, including power transistors or hybrid electronic devices mounted on a printed circuit board, an electronic power supplies, etc.
Further features and advantages of the invention will be apparent from the description below.
The invention is herein described, by way of example only, with reference to the accompanying drawings, wherein:
Fig. 1 illustrates one form of apparatus constructed in accordance with the present invention;
Fig. 2 is a side elevational view of the apparatus of Fig. 1 ;
Fig. 3 illustrates a second form of apparatus constructed in accordance with the present invention;
Fig. 4 is a side elevational view of a part of the apparatus of Fig. 3;
Fig. 5 illustrates a further form of apparatus constructed in accordance with the present invention;
Fig. 6 is a fragmentary view of a portion of the apparatus of Fig. 5 to better show internal structure; and Fig. 7 illustrates a further form of apparatus constructed in accordance with the present invention.
Figs. 1 and 2 illustrate the invention as applied for cooling a power transistor 2 mounted on a printed circuit board 3 by a plurality of spacers 4. In this apparatus, the power transistor 2 is cooled by an ion wind generated by corona discharge produced between an anode electrode 5 and a cathode electrode 6 mounted adjacent to the power transistor 2. The anode electrode 5 includes a first leg 5a fixed to the printed circuit board to extend perpendicularly thereto, and a second leg 5b bent perpendicularly to leg 5a in the direction of the cathode 6 and terminating in a pointed tip 5c.
The cathode 6 includes a mounting leg 6a extending parallel to the printed circuit board 3 and mounted directly thereto. Cathode 6 further includes a planar section 6b extending perpendicularly to the printed circuit board and formed with an enlarged opening 6c coaxial with leg 5b and pointed tip 5c of the anode 5.
Thus, a voltage applied between the anode 5 and the cathode 6, which is sufficient to produce a corona discharge from the anode towards the cathode, forms positive ions at the anode 5. These ions are accelerated towards the cathode 6 and produce an ion wind, as shown by arrow 7 in Fig. 2, in the direction of the power transistor 2. This ion wind causes heat dissipation by convection from the power transistor 2 , thereby cooling it. The apparatus of Figs. 1 and 2 may thus be used for cooling individual power transistors mounted on a printed circuit board. For example, one electrode assembly including the anode 5 and cathode 6 may be provided for and adjacent to each power transistor to be cooled.
Figs. 3 and 4 illustrate the invention also applied for cooling a power transistor, but is particularly applicable for larger size power transistors which generate considerable quantities of heat. Thus, the power transistor 10 illustrated in Fig. 3 is mounted on a heat sink 11 carried by the printed circuit board 12. In this case, the electrode assembly producing the ion wind includes a cathode 13 of channel configuration and an anode 14 in the form of a wire both carried by a bracket 15 mounted to the printed circuit board 12 in alignment with the power transistor 10 and the heat sink 11 to be cooled.
As shown particularly in Fig. 4, the cathode 13 includes a main planar section 13a formed with a longitudinally-extending rectangular slot 13b, two wing sections 13c, 13d along the opposite longitudinal edges of the slot, and a mounting section 13e fixed to the printed circuit board 12. The wing sections 13c, 13d are angled towards, but terminate short of, each other to produce an airgap 14 between the confronting edges of the two wing sections.
The anode 15 is in the form of a wire secured between two terminals 15a, 15b and extending along the slot 13b of the main cathode section 13a between its wing sections 13c, 13d.
The printed circuit board 12 further includes connectors, shown schematically at 17, for making the electrical connections to the power transistor 10, as well as to the electrodes 13 and 15.
When the appropriate voltage is applied between the cathode 13 and the anode 15, positive ions are produced at the anode 15. These positive ions are accelerated and are directed by the cathode wing sections 13c, 13d to produce an ion wind through the gap 14 for cooling the power transistor 10 and its heat sink 11.
Figs. 5 and 6 illustrate the invention as applied for cooling a power hybrid regulator 21 mounted on a chassis or printed circuit board 22 by means of a plurality of spacers 23. In this case, the ion wind for cooling the regulator 21 is produced by an electrode assembly including a cathode 24 and a pair of anodes 25, 26, mounted between the chassis or printed circuit board 22 and the power hybrid regulator 21 to be cooled.
Thus, the cathode 24 is of planar configuration and is mounted to the chassis or printed circuit board 22 by a spacer 27. The cathode 24 is formed with a pair of circular openings 24a, 24b, each receiving the pointed tip of the anode electrodes 25, 26 and coaxial therewith, as described above with respect to Figs. 1 and 2. In the construction illustrated in Figs. 5 and 6, an ion wind is produced by each of the anodes 25, 26 and the common cathode 24, and these ions winds are directed towards the power hybrid regulator 21 to dissipate the heat therefrom by convection, as described above with respect to Figs. 1 and 2.
Fig. 7 illustrates a further application of the invention for cooling an electrical device, such as a power supply, housed within a housing 30. Thus, one end of the housing 30 is formed with an opening 31 occupied by an electrode assembly including a cathode 32 and a plurality of anodes 33, 34, 35, etc. The cathode 32 is common to all of the anodes. Thus, the common cathode 32 includes a main planar section 32a formed with a plurality of longitudinally-extending rectangular slots 32b, one for each of the anodes 33-35. The common cathode 32 is further formed with a pair of wing sections 32c, 32d extending along the opposite longitudinal edges of each slot 32b. The wing sections are angled towards each other but terminate short of each other, similar to the arrangement illustrated in Figs. 3 and 4, such that they accelerate the positive ions produced by the respective anodes 33-35 and direct them into the interior of housing 30 so as to dissipate the heat generated by the electrical device within the housing through the outlet opening 37 formed at the opposite end of the housing.
It will thus be seen that in the construction illustrated in Fig. 7, the anodes 33-35 form, with their respective cathode wing sections 32c, 32d, a plurality of electrode assemblies extending along one orthogonal axis (shown at A ) and spaced from each other along a second orthogonal axis (A ) to generate an ion wind along the third othogonal axis (A ) .
The illustrated apparatus, and particularly that illustrated in Fig. 7, is especially useful for cooling electrical power supplies or components thereof. It will be appreciated, however, that the invention could advantageously be used with respect to other type of heat- generating bodies, for example bodies wherein the heat is generated by friction, fuel combustion, etc.
Many other variations, modifications and applications of the invention will be apparent.

Claims

WHAT IS CLAIMED IS:
1. A method of cooling a heat-generating body, comprising: generating an ion wind by corona discharge; and directing said ion wind towards said heat- generating body to dissipate substantial quantities of heat therefrom by convection.
2. The method according to Claim 1 , wherein said corona discharge is produced between a pointed anode and a cathode.
3. The method according to Claim 2, wherein said cathode is a planar cathode formed with an opening coaxial with that of said pointed anode.
4. The method according to Claim 1 , wherein said corona discharge is produced between a wire anode and a cathode of an electrode assembly.
5. The method according to Claim 4, wherein said cathode includes a planar section formed with a longitudinally-extending rectangular slot having two wing sections extending along the opposite longitudinal edges of the slot, said wing sections being angled towards, but terminating short of, each other; said wire anode being located midway between said wing sections such that said wing sections direct the ion wind towards said heat-generating body.
6. The method according to Claim 5, wherein there are a plurality of said electrode assemblies extending along one orthogonal axis and spaced from each other along a second orthogonal axis to generate an ion wind along the third orthogonal axis.
7. The method according to any one of Claims 1-6, wherein the method is applied for cooling a power transistor mounted on a printed circuit board.
8. The method according to any one of Claims 1-6, wherein the method is applied for cooling a hybrid electronic device.
9. The method according to any one of Claims 1-6, wherein the method is applied for cooling an electrical power supply.
10. The method according to any one of Claims 1-6, wherein said heat-generating body is located within a housing, and said ion-wind generating means is mounted at one end of said housing and is effective to produce an ion wind passing through said housing and through the opposite end thereof.
11. Apparatus for cooling a heat-generating body, comprising an electrode assembly for generating an ion wind by corona discharge and for directing said ion wind towards said heat-generating body to dissipate heat therefrom by convection.
12. The apparatus according to Claim 11 , wherein said electrode assembly comprises a cathode and a pointed anode located adjacent to said cathode.
13. The apparatus according to Claim 12, wherein said cathode is a planar cathode formed with an opening coaxial with said pointed anode.
14. The apparatus according to Claim 11, wherein said electrode assembly comprises a cathode and a wire anode located adjacent to said cathode.
15. The apparatus according to Claim 14, wherein said cathode includes a planar section formed with a longitudinally-extending rectangular slot having two wing sections extending along the opposite longitudinal edges of the slot, said wing sections being angled towards, but terminating short of, each other; said wire anode being located midway between said wing sections such that said wing sections direct the ion wind towards said heat-generating body.
16. The apparatus according to Claim 15, wherein there are a plurality of said electrode assemblies extending along one orthogonal axis and spaced from each other along a second orthogonal axis to generate an ion wind along the third orthogonal axis.
17. The apparatus according to any one of Claims 11-16, wherein said heat-generating body is a power transistor mounted in a printed circuit board.
18. The apparatus according to any one of Claims 11-16, wherein said heat-generating body is a power hybrid regulator.
19. The apparatus according to any one of Claims 11-16, wherein said heat-generating body is a power supply for electrical apparatus.
20. The apparatus according to any one of Claims 11-16, wherein said heat-generating body is located within a housing, and said ion-wind generating means is mounted at one end of said housing and is effective to produce an ion wind passing through said housing and through the opposite end thereof.
PCT/US1993/011378 1992-11-25 1993-11-23 Cooling method and apparatus WO1994012282A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU56754/94A AU5675494A (en) 1992-11-25 1993-11-23 Cooling method and apparatus

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IL103867 1992-11-25
IL103867A IL103867A0 (en) 1992-11-25 1992-11-25 Cooling method and apparatus

Publications (1)

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Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2003083574A1 (en) 2002-03-28 2003-10-09 Sanyo Electric Co., Ltd. Projection type image display unit
EP1571489A1 (en) * 2002-12-12 2005-09-07 Sanyo Electric Co., Ltd. Projection type image display unit
DE102005003478A1 (en) * 2005-01-25 2006-05-04 Siemens Ag Current converter such as a frequency converter has cooling body and flow valve with ion and electric field generators to give surface ion flow
WO2007087219A2 (en) * 2006-01-23 2007-08-02 Mobility Electronics, Inc. Power supply with electrostatic cooling fan
WO2007112763A1 (en) * 2006-04-03 2007-10-11 Aureola Swedish Engineering Ab Method and apparatus for cooling and ventilation
EP1901352A1 (en) * 2006-09-12 2008-03-19 Neng Tyi Precision Industries Co., Ltd. Heat sink device generating an ionic wind
WO2009106438A1 (en) * 2008-02-25 2009-09-03 Fujitsu Siemens Computers Gmbh Electronic device with ion cooling system
WO2010070484A1 (en) * 2008-12-15 2010-06-24 Koninklijke Philips Electronics N.V. Cooling arrangement for a luminaire
US8054626B2 (en) * 2009-10-06 2011-11-08 Samsung Electronics Co., Ltd. Display apparatus having a cooling device
CN105514063A (en) * 2016-01-15 2016-04-20 广东工业大学 Plasma air cooling device
CN105722378A (en) * 2016-04-22 2016-06-29 广东工业大学 Microelectronic chip radiator
CN108551079A (en) * 2018-06-22 2018-09-18 嘉兴学院 A kind of ion wind high-efficiency radiator

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2477947A (en) * 1945-01-30 1949-08-02 Electronic Dusting Corp Method and device for projecting powders carrying electrostatic charges
US3184901A (en) * 1959-12-08 1965-05-25 Lab For Electronics Inc Gaseous concentration and separation apparatus
US4164901A (en) * 1978-01-16 1979-08-21 American Air Filter Company, Inc. Indoor gun firing range enclosure having a ventilation system
US4955991A (en) * 1986-04-21 1990-09-11 Astra-Vent Ab Arrangement for generating an electric corona discharge in air
US4976752A (en) * 1988-09-26 1990-12-11 Astra Vent Ab Arrangement for generating an electric corona discharge in air
US5053912A (en) * 1988-03-10 1991-10-01 Astra-Vent Ab Air transporting arrangement
US5090482A (en) * 1990-01-03 1992-02-25 Spectronix Ltd. Method and apparatus for extinguishing fires

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2477947A (en) * 1945-01-30 1949-08-02 Electronic Dusting Corp Method and device for projecting powders carrying electrostatic charges
US3184901A (en) * 1959-12-08 1965-05-25 Lab For Electronics Inc Gaseous concentration and separation apparatus
US4164901A (en) * 1978-01-16 1979-08-21 American Air Filter Company, Inc. Indoor gun firing range enclosure having a ventilation system
US4955991A (en) * 1986-04-21 1990-09-11 Astra-Vent Ab Arrangement for generating an electric corona discharge in air
US5053912A (en) * 1988-03-10 1991-10-01 Astra-Vent Ab Air transporting arrangement
US4976752A (en) * 1988-09-26 1990-12-11 Astra Vent Ab Arrangement for generating an electric corona discharge in air
US5090482A (en) * 1990-01-03 1992-02-25 Spectronix Ltd. Method and apparatus for extinguishing fires

Cited By (24)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1489458A1 (en) * 2002-03-28 2004-12-22 Sanyo Electric Co., Ltd. Projection type image display unit
WO2003083574A1 (en) 2002-03-28 2003-10-09 Sanyo Electric Co., Ltd. Projection type image display unit
EP1489458A4 (en) * 2002-03-28 2008-03-19 Sanyo Electric Co Projection type image display unit
EP1571489A4 (en) * 2002-12-12 2008-03-19 Sanyo Electric Co Projection type image display unit
EP1571489A1 (en) * 2002-12-12 2005-09-07 Sanyo Electric Co., Ltd. Projection type image display unit
CN1720481B (en) * 2002-12-12 2012-01-25 三洋电机株式会社 Projection type image display unit
US7407293B2 (en) 2002-12-12 2008-08-05 Sanyo Electric Co., Ltd. Projection type image display unit
DE102005003478A1 (en) * 2005-01-25 2006-05-04 Siemens Ag Current converter such as a frequency converter has cooling body and flow valve with ion and electric field generators to give surface ion flow
WO2007087219A3 (en) * 2006-01-23 2007-11-22 Mobility Electronics Inc Power supply with electrostatic cooling fan
WO2007087219A2 (en) * 2006-01-23 2007-08-02 Mobility Electronics, Inc. Power supply with electrostatic cooling fan
US7830643B2 (en) 2006-01-23 2010-11-09 Igo, Inc. Power supply with electrostatic cooling fan
WO2007112763A1 (en) * 2006-04-03 2007-10-11 Aureola Swedish Engineering Ab Method and apparatus for cooling and ventilation
EP1901352A1 (en) * 2006-09-12 2008-03-19 Neng Tyi Precision Industries Co., Ltd. Heat sink device generating an ionic wind
WO2009106438A1 (en) * 2008-02-25 2009-09-03 Fujitsu Siemens Computers Gmbh Electronic device with ion cooling system
US8045315B2 (en) 2008-02-25 2011-10-25 Fujitsu Technology Solutions Intellectual Property Gmbh Electronic device with ion cooling system
WO2010070484A1 (en) * 2008-12-15 2010-06-24 Koninklijke Philips Electronics N.V. Cooling arrangement for a luminaire
CN102246372A (en) * 2008-12-15 2011-11-16 皇家飞利浦电子股份有限公司 Cooling arrangement for a luminaire
RU2513026C2 (en) * 2008-12-15 2014-04-20 Конинклейке Филипс Электроникс Н.В. Cooling plant for lighting device
US8851714B2 (en) 2008-12-15 2014-10-07 Koninklijke Philips N.V. Cooling arrangement for a luminaire
US8054626B2 (en) * 2009-10-06 2011-11-08 Samsung Electronics Co., Ltd. Display apparatus having a cooling device
CN105514063A (en) * 2016-01-15 2016-04-20 广东工业大学 Plasma air cooling device
CN105722378A (en) * 2016-04-22 2016-06-29 广东工业大学 Microelectronic chip radiator
CN108551079A (en) * 2018-06-22 2018-09-18 嘉兴学院 A kind of ion wind high-efficiency radiator
CN108551079B (en) * 2018-06-22 2024-02-13 嘉兴学院 Ion wind high-efficiency radiator

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Publication number Publication date
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AU5675494A (en) 1994-06-22

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