WO2013145604A1 - 換気システム - Google Patents
換気システム Download PDFInfo
- Publication number
- WO2013145604A1 WO2013145604A1 PCT/JP2013/001664 JP2013001664W WO2013145604A1 WO 2013145604 A1 WO2013145604 A1 WO 2013145604A1 JP 2013001664 W JP2013001664 W JP 2013001664W WO 2013145604 A1 WO2013145604 A1 WO 2013145604A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- housing
- piezoelectric blower
- ventilation
- air
- ventilation system
- Prior art date
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Classifications
-
- 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
- H05K7/20845—Modifications to facilitate cooling, ventilating, or heating for automotive electronic casings
- H05K7/20863—Forced ventilation, e.g. on heat dissipaters coupled to components
-
- 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
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
- F21S45/00—Arrangements within vehicle lighting devices specially adapted for vehicle exteriors, for purposes other than emission or distribution of light
- F21S45/30—Ventilation or drainage of lighting devices
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F7/00—Ventilation
- F24F7/007—Ventilation with forced flow
-
- 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
- H05K7/20154—Heat dissipaters coupled to components
- H05K7/20163—Heat dissipaters coupled to components the components being isolated from air flow, e.g. hollow heat sinks, wind tunnels or funnels
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
- F21V31/00—Gas-tight or water-tight arrangements
- F21V31/03—Gas-tight or water-tight arrangements with provision for venting
Definitions
- This invention relates to the ventilation system which ventilates the inside of a housing
- an object of the present invention is to provide a ventilation system that can exhaust moisture from the inside of a housing in a space-saving manner and in a short time.
- a ventilation system includes a housing having at least a pair of vent holes and a diaphragm attached to at least one of the pair of vent holes by vibrating a piezoelectric element. And a piezoelectric blower that causes air to flow through the mouth.
- the piezoelectric blower since the piezoelectric blower has a thin plate shape, forced convection can be generated in a small space. Moreover, since the piezoelectric blower continuously operates while electricity is supplied, moisture can be discharged from the inside of the housing to the outside in a short time.
- FIG. 1 shows a ventilation system 1 according to an embodiment of the present invention.
- the ventilation system 1 includes a housing 2 and a piezoelectric blower 3.
- the housing 2 accommodates, for example, electrical components.
- a part of the housing 2 is composed of a transparent member 25 made of resin or glass.
- the transparent member 25 transmits light from a light source accommodated in the housing 2.
- the entire housing 2 may be composed of the transparent member 25.
- casing 2 does not necessarily need to contain a transparent member, for example, when the ventilation system 1 is applied to ECU (Electrical * Control * Unit) of a motor vehicle, you may be comprised entirely with the metal.
- the housing 2 has at least a pair of vent holes 21.
- the pair of vent holes 21 are provided so as to be separated from each other in the vertical direction, the vent hole 21 positioned below is for intake, and the vent hole 21 positioned above is for exhaust.
- a piezoelectric blower 3 that causes air to flow through the vent 21 is attached to the vent 21 located below so as to cover the vent 21. In the present embodiment, the piezoelectric blower 3 sends air into the housing 2 through the vent hole 21.
- the piezoelectric blower 3 may be attached to the vent 21 located above in the direction opposite to that in FIG. 1. In this case, the piezoelectric blower 3 discharges air from the inside of the housing 2 through the vent hole 21 to the outside.
- the piezoelectric blower 3 may be attached to both the vent holes 21.
- air is supplied from one vent hole 21 into the housing 2 (see FIG. 1), and the air flows from the other vent hole 21 to the outside of the housing 2.
- the piezoelectric blower 3 is preferably attached so as to be discharged (see FIG. 2).
- the piezoelectric blower 3 has a thin plate shape that is flat in the opening direction of the vent hole 21.
- the piezoelectric blower 3 sucks air from the periphery of the piezoelectric blower 3 through the plurality of inlets 31 and discharges air from the central outlet 33.
- the direction in which the inflow port 31 opens is not necessarily opposite to the direction in which the outflow port 33 opens, and may be a direction orthogonal to the direction in which the outflow port 33 opens.
- the piezoelectric blower 3 includes a main wall 41 that extends from the nozzle that forms the outflow port 33, an opposing wall 42 that is spaced from the main wall 41, and a diaphragm that is spaced from the facing wall 42. 43.
- FIG. 3 is quoted from the website of Murata Manufacturing Co., Ltd. Between the main wall 41 and the opposing wall 42, flow paths 32 from the respective inlets 31 to the outlets 33 are formed, and between the opposing wall 42 and the diaphragm 43, a pump chamber 35 is formed.
- An injection port 41 a is provided in the center of the opposing wall 42 by a through hole that penetrates the opposing wall 42, and a piezoelectric element 44 is attached to the diaphragm 43.
- the piezoelectric element 44 vibrates the diaphragm 43 in the opening direction of the injection port 41a (the thickness direction of the opposing wall 42), and increases or decreases the volume of the pump chamber 35.
- the volume of the pump chamber 35 decreases, air is pushed out from the injection port 41 a toward the outlet port 33.
- the volume of the pump chamber 35 increases, air flows into the pump chamber 35 through the injection port 41a, but most of the air flowing through the flow path 32 continues to flow out of the outlet 33 due to inertia.
- the inlet 31 may be covered with a breathable member made of resin or metal in order to prevent foreign matters such as water and dust from being sucked into the piezoelectric blower 3.
- a gas permeable member a woven fabric, a non-woven fabric, a mesh, a net, a sponge, a foam, a porous body, and the like, and the same waterproof breathable membrane 6 described later can be used.
- one breathable member 45 may be disposed on the suction side of the piezoelectric blower 3 so as to cover all the inflow ports 31.
- a breathable support material 47 may be disposed on the discharge side of the piezoelectric blower 3 so as to cover the outflow port 33.
- the air-permeable support material 47 may be affixed to the tip end surface of the nozzle, or may be held by a support 46 that fits into the nozzle.
- Various methods can be used to attach the piezoelectric blower 3 to the vent 21. For example, joining to the housing
- the main wall 41 is made of resin or the piezoelectric blower 3 is combined with another resin material, ultrasonic waves or hot plate welding, press-fitting into the vent 21, and the inner surface of the housing 2 through the vent 21 Engagement (snap fit) or the like can also be adopted.
- the flow rate of air that can be sent out by the piezoelectric blower 3 is, for example, 0.1 to 5 L / min under atmospheric pressure.
- the ventilation member 5 includes a waterproof ventilation membrane 6, a support body 51 that supports the waterproof ventilation membrane 6 and is fixed to the housing 2, and a cover 52 that covers the waterproof ventilation membrane 6.
- the support 51 has a tubular shape as a whole, and has a flange portion 51a to which the waterproof breathable membrane 6 is attached, and a cylindrical portion 51b that protrudes from the flange portion 51a and is inserted into the vent 21 of the housing 2. is doing.
- a seal member 7 that seals the gap between the ventilation member 5 and the housing 2 is attached to the base portion of the cylindrical portion 51b.
- a claw portion 51c that is locked to the peripheral edge portion of the vent hole 21 from the inside of the housing 2 is formed.
- the cover 52 is provided with a through hole 52a for opening a space facing the waterproof breathable membrane 6 to the outside.
- the configuration of the ventilation member 5 is not necessarily limited to that shown in FIG. 6, and various changes can be made.
- the support body 51 when a boss protrudes from the housing 2 so as to extend the vent hole 21, the support body 51 may be configured to be fitted to the boss from the outside.
- the air passage becomes a labyrinth structure, so that the waterproof air-permeable membrane 6 can be omitted.
- the cover 52 can be omitted as appropriate.
- the structure and material of the waterproof gas-permeable membrane 6 are not particularly limited as long as the waterproof gas-permeable membrane 6 allows gas permeation and prevents liquid permeation (such as a woven fabric, a nonwoven fabric, a mesh, or a net made of resin or metal).
- the waterproof breathable membrane 6 may have a configuration in which a reinforcing layer is laminated on a resin porous membrane. By providing the reinforcing layer, the waterproof air-permeable membrane 6 having high strength can be obtained.
- a fluororesin porous body or a polyolefin porous body that can be manufactured by a known stretching method or extraction method can be used.
- the fluororesin include PTFE (polytetrafluoroethylene), polychlorotrifluoroethylene, tetrafluoroethylene-hexafluoropropylene copolymer, tetrafluoroethylene-ethylene copolymer, and the like.
- the monomer constituting the polyolefin include ethylene, propylene, 4-methylpentene-1,1butene, and the like, and polyolefins obtained by polymerizing or copolymerizing these monomers alone can be used.
- the nanofiber film porous body using polyacrylonitrile, nylon, polylactic acid, etc. can also be used.
- a PTFE porous body that has a small area, can ensure air permeability, and has a high function of preventing foreign substances from entering the inside of the housing is preferable.
- the resin porous film may be subjected to a liquid repellent treatment according to the usage environment of the housing 2.
- the liquid repellent treatment can be performed by applying a substance having a small surface tension to the porous resin membrane, drying, and curing.
- the liquid repellent used for the liquid repellent treatment only needs to be able to form a film having a lower surface tension than the resin porous film.
- a liquid repellent containing a polymer having a perfluoroalkyl group is suitable.
- the liquid repellent agent can be applied by impregnation, spraying, or the like.
- Coating methods using an oil repellent containing a polymer having a perfluoroalkyl group are air spray method, electrostatic spray method, dip coating method, spin coating method, roll coating (such as kiss coating method and gravure coating method). Coating of a polymer solution or dispersion having a perfluoroalkyl group by a method, a curtain flow coating method, an impregnation method, etc., a film forming method by an electrodeposition coating method or a plasma polymerization method, etc.
- the method is not particularly limited as long as it can be formed. Further, from the viewpoint of ensuring sufficient waterproofness, it is desirable that the average pore diameter of the resin porous membrane is 0.01 ⁇ m or more and 10 ⁇ m or less.
- the material for the reinforcing layer it is preferable to use a material that is more breathable than the porous resin membrane.
- a material that is more breathable than the porous resin membrane Specifically, a woven fabric, a nonwoven fabric, a mesh, a net, a sponge, a foam, a porous body, or the like made of resin or metal can be used.
- a method for joining the resin porous membrane and the reinforcing layer there are methods such as adhesive laminating, heat laminating, heat welding, ultrasonic welding, and adhesion with an adhesive.
- the thickness of the waterproof gas-permeable membrane 6 may be adjusted within a range of 1 ⁇ m to 5 mm, for example, in consideration of strength and ease of fixing to the support 51.
- the air permeability of the waterproof air-permeable membrane 6 is preferably expressed in terms of Gurley number and more than 0 sec / 100 mL to 50 sec / 100 mL or less, more preferably 0 sec / 100 mL to 1 sec / 100 mL or less. preferable.
- the piezoelectric blower 3 has a thin plate shape, so that forced convection can be generated in a small space. Moreover, since the piezoelectric blower 3 operates continuously while electricity is supplied, moisture can be discharged from the inside of the housing 2 to the outside in a short time. For example, when the ventilation system 1 is applied to a lamp for an automobile, the interior of the housing 2 is forcibly ventilated at the same time as starting the engine of the automobile, and moisture is applied to the transparent member 25 constituting a part of the housing 2. Even if fogging occurs due to condensation, the fogging can be quickly removed.
- Example 1 A casing 2 including a transparent member 25 and provided with a pair of vent holes 21 as shown in FIG. 1 was prepared.
- the volume in the housing 2 was about 6000 cm 3 , and the diameters of both vent holes 21 were 5 mm.
- the casing 2 was placed in a constant temperature bath at a temperature of 45 ° C. and a humidity of 90% for 30 minutes.
- the piezoelectric blower 3 was attached to the vent 21 below the housing 2.
- a micro blower manufactured by Murata Manufacturing Co., Ltd. driving frequency: about 26 kHz, discharge amount under atmospheric pressure: 1 L / min
- Example 2 A ventilation system was obtained in the same manner as in Example 1 except that the ventilation member 5 as shown in FIG.
- the air permeability of the waterproof gas-permeable membrane 6 of the ventilation member 5 was 0.25 seconds / mL in terms of Gurley number.
- Example 1 In the comparative example using natural convection, it took a long time of 60 minutes to remove the fog. On the other hand, in Example 1 using forced convection, haze could be removed in only 30 minutes. Also in Example 2 in which the ventilation member 5 was attached to the upper ventilation hole 21, the cloudiness could be removed in 45 minutes.
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- Engineering & Computer Science (AREA)
- Microelectronics & Electronic Packaging (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- Arrangement Of Elements, Cooling, Sealing, Or The Like Of Lighting Devices (AREA)
- Reciprocating Pumps (AREA)
- Cooling Or The Like Of Electrical Apparatus (AREA)
- Separation Using Semi-Permeable Membranes (AREA)
Abstract
Description
図1に示すような、透明部材25を含み、一対の通気口21が設けられた筐体2を用意した。筐体2内の容積は約6000cm3であり、双方の通気口21の直径は5mmであった。この筐体2を、温度45℃、湿度90%の恒温槽内に30分間設置した。
上方の通気口21に、図6に示すような通気部材5を取り付けた以外は実施例1と同様にして換気システムを得た。通気部材5の防水通気膜6の通気度は、ガーレー数で表示して0.25秒/mLであった。
一対の通気口21を開放状態のままにした以外は実施例1と同様にして換気システムを得た(自然対流)。
実施例1,2および比較例の換気システムにおける透明部材25に、10℃の純水を30秒間散布した。その後、圧電ブロア3の電源を入れて、15分ごとに曇りの状態を確認した。その結果を表1に示す。
Claims (4)
- 少なくとも一対の通気口を有する筐体と、
前記一対の通気口の少なくとも一方に取り付けられた、ダイヤフラムを圧電素子により振動させることにより前記通気口を通じた空気の流通を生じさせる圧電ブロアと、
を備えた、換気システム。 - 前記筐体の少なくとも一部は、透明部材で構成されている、請求項1に記載の換気システム。
- 前記圧電ブロアは前記一対の通気口の一方に取り付けられており、
前記一対の通気口の他方には、前記筐体内への水の侵入を防止する通気部材が取り付けられている、請求項1に記載の換気システム。 - 前記通気部材は、通気度がガーレー数で表示して50秒/100mL以下の防水通気膜を含む、請求項3に記載の換気システム。
Priority Applications (5)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
IN8785DEN2014 IN2014DN08785A (ja) | 2012-03-30 | 2013-03-13 | |
KR1020147030049A KR20150002698A (ko) | 2012-03-30 | 2013-03-13 | 환기 시스템 |
EP13770197.5A EP2833706A4 (en) | 2012-03-30 | 2013-03-13 | VENTILATION SYSTEM |
US14/388,145 US20150050877A1 (en) | 2012-03-30 | 2013-03-13 | Ventilation system |
CN201380018410.2A CN104206042A (zh) | 2012-03-30 | 2013-03-13 | 换气系统 |
Applications Claiming Priority (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2012079296 | 2012-03-30 | ||
JP2012-079296 | 2012-03-30 | ||
JP2012198242A JP6068886B2 (ja) | 2012-03-30 | 2012-09-10 | 換気システム |
JP2012-198242 | 2012-09-10 |
Publications (1)
Publication Number | Publication Date |
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WO2013145604A1 true WO2013145604A1 (ja) | 2013-10-03 |
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ID=49258919
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
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PCT/JP2013/001664 WO2013145604A1 (ja) | 2012-03-30 | 2013-03-13 | 換気システム |
Country Status (7)
Country | Link |
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US (1) | US20150050877A1 (ja) |
EP (1) | EP2833706A4 (ja) |
JP (1) | JP6068886B2 (ja) |
KR (1) | KR20150002698A (ja) |
CN (1) | CN104206042A (ja) |
IN (1) | IN2014DN08785A (ja) |
WO (1) | WO2013145604A1 (ja) |
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- 2012-09-10 JP JP2012198242A patent/JP6068886B2/ja active Active
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2013
- 2013-03-13 US US14/388,145 patent/US20150050877A1/en not_active Abandoned
- 2013-03-13 KR KR1020147030049A patent/KR20150002698A/ko not_active Application Discontinuation
- 2013-03-13 IN IN8785DEN2014 patent/IN2014DN08785A/en unknown
- 2013-03-13 WO PCT/JP2013/001664 patent/WO2013145604A1/ja active Application Filing
- 2013-03-13 EP EP13770197.5A patent/EP2833706A4/en not_active Withdrawn
- 2013-03-13 CN CN201380018410.2A patent/CN104206042A/zh active Pending
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JPH09149301A (ja) * | 1995-11-17 | 1997-06-06 | Fuji Photo Optical Co Ltd | 換気手段を備えた雲台装置 |
JPH11145659A (ja) * | 1997-11-10 | 1999-05-28 | Sony Corp | 空冷装置 |
JP2004317900A (ja) * | 2003-04-18 | 2004-11-11 | Tohoku Matsushita Technical Service Kk | 監視カメラ用ハウジング |
JP2007186189A (ja) * | 2005-12-14 | 2007-07-26 | Nitto Denko Corp | 通気部材および通気構造 |
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JP2011519136A (ja) | 2008-04-24 | 2011-06-30 | ゴア エンタープライズ ホールディングス,インコーポレイティド | ランプ包囲体用換気システム |
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See also references of EP2833706A4 |
Also Published As
Publication number | Publication date |
---|---|
IN2014DN08785A (ja) | 2015-05-22 |
CN104206042A (zh) | 2014-12-10 |
JP6068886B2 (ja) | 2017-01-25 |
JP2013229281A (ja) | 2013-11-07 |
EP2833706A1 (en) | 2015-02-04 |
US20150050877A1 (en) | 2015-02-19 |
KR20150002698A (ko) | 2015-01-07 |
EP2833706A4 (en) | 2016-02-10 |
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