WO2011027424A1 - Appareil collecteur de poussière, appareil électronique et appareil d'affichage par projection le comprenant tous les deux, et procédé de collecte de poussière - Google Patents

Appareil collecteur de poussière, appareil électronique et appareil d'affichage par projection le comprenant tous les deux, et procédé de collecte de poussière Download PDF

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Publication number
WO2011027424A1
WO2011027424A1 PCT/JP2009/065313 JP2009065313W WO2011027424A1 WO 2011027424 A1 WO2011027424 A1 WO 2011027424A1 JP 2009065313 W JP2009065313 W JP 2009065313W WO 2011027424 A1 WO2011027424 A1 WO 2011027424A1
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WO
WIPO (PCT)
Prior art keywords
air
dust
air filter
dust collector
filter
Prior art date
Application number
PCT/JP2009/065313
Other languages
English (en)
Japanese (ja)
Inventor
和弥 槙田
隆之 岡田
Original Assignee
Ｎｅｃディスプレイソリューションズ株式会社
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 Ｎｅｃディスプレイソリューションズ株式会社 filed Critical Ｎｅｃディスプレイソリューションズ株式会社
Priority to PCT/JP2009/065313 priority Critical patent/WO2011027424A1/fr
Priority to JP2011529717A priority patent/JP5119507B2/ja
Publication of WO2011027424A1 publication Critical patent/WO2011027424A1/fr

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
    • B01D46/10—Particle separators, e.g. dust precipitators, using filter plates, sheets or pads having plane surfaces
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
    • G03B21/00—Projectors or projection-type viewers; Accessories therefor
    • G03B21/14—Details
    • G03B21/145—Housing details, e.g. position adjustments thereof
    • 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
    • H05K7/20181—Filters; Louvers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2273/00—Operation of filters specially adapted for separating dispersed particles from gases or vapours
    • B01D2273/30—Means for generating a circulation of a fluid in a filtration system, e.g. using a pump or a fan
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2275/00—Filter media structures for filters specially adapted for separating dispersed particles from gases or vapours
    • B01D2275/30—Porosity of filtering material
    • B01D2275/302—Means for changing the porosity of a filter element, e.g. adjustment of a slit width, compression of a foam material
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2279/00—Filters adapted for separating dispersed particles from gases or vapours specially modified for specific uses
    • B01D2279/45—Filters adapted for separating dispersed particles from gases or vapours specially modified for specific uses for electronic devices, e.g. computers, hard-discs, mobile phones

Definitions

  • the present invention relates to a dust collector that is used in an electronic device including a heating element such as a heat generating component and through which air for cooling the heat generating component passes.
  • the present invention also relates to an electronic device including a dust collector, a projection display device, and a dust collection method.
  • an air filter is used to prevent dust from entering the inside.
  • the air sucked from the outside of the electronic device passes through the air filter, and the air after the dust is removed is blown to the heat generating component to cool the heat generating component.
  • the general structure is that an air filter is attached to the intake louver provided on the outer periphery of the housing, and external air sucked from the intake louver passes through the air filter and is sent into the electronic equipment. It is.
  • the dust removal performance of the air filter increases as the eyes of the air filter become finer.
  • the air filter is likely to be clogged.
  • the air flow rate through the air filter is increased, so that the air filter is easily clogged.
  • the air taken in from the outside reduces and the air volume blown to a heat-emitting component decreases. As a result, there is a risk that the mounting components will deteriorate or break down as the temperature of the heat generating components rises.
  • Patent Document 1 discloses a communication device including a dust collecting device that sucks dust adhering to an air filter with a suction nozzle connected to a compressor. In recent years, a similar configuration has been put to practical use as a filter cleaning mechanism of an air conditioner (air conditioner).
  • air conditioner air conditioner
  • Patent Document 2 discloses a cleaning device having a configuration in which dust attached to an air filter is blown away by passing air in a direction opposite to the intake direction.
  • the configuration described in Patent Document 2 is a configuration including a motor that rotates the position of the air filter by the motor, and a complicated mechanism such as the nozzle moving mechanism included in the configuration of Patent Document 1 described above is unnecessary.
  • Patent Document 3 discloses a technique related to an air filter disposed in a vacuum cleaner.
  • the air filter formed in a cylindrical shape is rotated, and the air filter is vibrated using a striking body provided on the peripheral surface of the air filter, or centrifugal force or air filter acting on the air filter is used. It is the structure which removes the dust adhering to an air filter with the airflow produced by this rotational movement.
  • Patent Document 4 discloses a configuration of a filter unit included in an air cleaner.
  • this air purifier after collecting a relatively large amount of dust by a cyclone method, a relatively small fine dust is collected by a cylindrical air filter having a fine structure.
  • the flow of air after collecting dust is the entire circumferential direction of the air filter, and the air filter is formed in a cylindrical shape, so that the flow of air is reduced. Loss is small and can be collected efficiently.
  • Patent Document 5 discloses a dust collection unit provided in a vacuum cleaner. This dust collection unit discloses a configuration in which cyclone type dust collection and dust collection by an air filter are combined.
  • Patent Document 1 it is possible to clean the air filter without stopping the operation of the communication device.
  • the suction nozzle becomes an obstacle to air suction during filter cleaning, cooling of the communication device is performed. The ability will be reduced. For this reason, it is desirable to stop the operation of the electronic device when cleaning the air filter.
  • the temperature of the electronic component may increase rapidly, leading to a problem of deterioration of the electronic component. Therefore, this configuration is not suitable for an electronic device that requires continuous operation for 24 hours, such as a projection display device for monitoring applications.
  • the compressor used as the suction source of the intake nozzle in the configuration of Patent Document 1 has a problem that vibration is likely to occur and noise is large.
  • Patent Document 2 since there is a structural restriction that it is necessary to arrange the air blowing paths on the intake side and the exhaust side at positions adjacent to each other, the degree of freedom in designing the device is impaired. . Moreover, in the structure of patent document 2, since an air filter is rotated centering
  • Patent Document 4 when the air filter is clogged, it is necessary to replace the air filter. When replacing the air filter, it is necessary to temporarily stop the operation of the electronic device, and there is a problem that the continuous operation is interrupted.
  • Patent Document 5 the configuration described in Patent Document 5 is the same as that of Patent Document 4 described above. Therefore, also in patent document 5, when the air filter is clogged, it is necessary to replace the air filter as in the configuration of patent document 4, and there is a problem that continuous operation of the electronic device is interrupted.
  • An object of the present invention is to provide a dust collector, an electronic apparatus, a projection display device, and a dust collection method that can solve the above-described technical problems.
  • An example of the purpose is to enable the cooling fan to continue to send air to the heating element even when the air filter is clogged, thereby extending the continuous operation time of the electronic device.
  • Another object is to reduce the size of the dust collector and to suppress noise from the cooling fan.
  • a dust collector includes an elastically deformable air filter that is disposed between an intake port and an exhaust port and has a collection surface on which dust accumulates, and a support that supports the air filter. And a cooling fan that sends the air that has passed through the air filter to the heating element.
  • the air filter is elastically deformed, the size of the eyes of the collection surface changes.
  • a dust collector is attached to and detached from an opening of an electronic device including a housing having an opening and a cooling fan that sends air sucked from the opening to a heating element.
  • the dust collector includes a structure having an intake port and an exhaust port.
  • the dust collector includes an elastically deformable air filter that is disposed between the air inlet and the air outlet in the structure and has a collecting surface on which dust is accumulated, and a support that supports the air filter.
  • the exhaust port is provided on the surface of the structure facing the collection surface and communicates with the opening of the housing.
  • an electronic apparatus includes the dust collector according to the present invention and a heating element that is cooled by the air that has passed through the dust collector.
  • the projection display device includes the dust collecting device according to the present invention and an optical member cooled by the air that has passed through the dust collecting device.
  • the dust collection method according to the present invention sends air that has passed through an elastically deformable air filter having a collection surface on which dust is accumulated to the heating element, and elastically deforms the air filter, thereby The size of the eyes is changed, and a part of the dust accumulated on the collecting surface passes through the air filter.
  • FIG. 1 is a perspective view of the projection display apparatus according to the first embodiment.
  • an intake louver 20 that takes air into the housing 6 is disposed on the side surface of the housing 6 included in the projection display device 1 of the first embodiment.
  • the configuration is the same as that of a simple projection display device.
  • the intake louver 20 is formed in a shape having a large slit in terms of appearance design, but the opening area of the intake opening provided inside the intake louver 20 is the intake louver 20 provided in a general projection display device. The opening area is less than half. For this reason, noise inside the housing 6 is prevented from leaking from the intake opening of the intake louver 20 to the outside of the housing 6.
  • FIG. 2 shows a perspective view of the projection display device 1 according to the embodiment with the upper portion of the housing 6 removed.
  • FIG. 3 the disassembled perspective view for demonstrating the internal structure of the projection type display apparatus 1 of embodiment is shown.
  • the projection display device 1 includes a projection lens 11 that projects a projected image, an optical engine 12, a lamp unit 13, a power supply unit 14, and a main board 15, and is mounted components. It comprises a plurality of cooling fans including an exhaust fan 16 for cooling the air.
  • the projection display device 1 includes a dust collection unit 3 that removes dust from the air sent into the housing 6.
  • the dust collection unit 3 is mounted in the vicinity of the opening 6a located on the side surface (the rear left side surface portion) of the housing 6 opposite to the one side surface on which the projection lens 11 is provided.
  • the image generation component in the optical engine 12 is cooled by the air that has passed through the dust collection unit 3.
  • FIG. 4 shows an exploded view of the internal structure of the dust collection unit 3.
  • the intake louver 20 is removed from the opening 6 a of the housing 6, and replacement work of the air filters 26 and 27 of the dust collection unit 3 is performed.
  • the intake louver 20 is removed from the housing 6, and then the knobs 28c and 29c provided on the flange portions 28b and 29b of the filter support frames 28 and 29 are grasped, and the air filters 26 and 27 are pulled out and projected.
  • the mold display device 1 is taken out from the inside.
  • FIG. 5 is a perspective view for explaining a duct configuration for cooling the mounted parts by the dust collecting unit 3 of the projection display device 1.
  • the red (R) cooling fan 31 (hereinafter referred to as the first cooling fan 31) and the green-blue (GB) cooling fan 32 (hereinafter referred to as the second cooling) constituting the dust collection unit 3.
  • the air outlet of the fan 32 is communicated with the liquid crystal display (LCD) section air duct 18.
  • the air volume is distributed according to the structure of the internal partition plate (not shown) of the LCD unit air duct 18, and the cooling air blows up substantially vertically from the opening provided on the upper surface of the LCD unit air duct 18. It is done.
  • An optical member which is an LCD unit as a heat generating element to be cooled is disposed above the LCD unit air duct 18, and the LCD unit is cooled by the cooling air blown from the opening of the LCD unit air duct 18. .
  • the air that has cooled the LCD unit then flows to cool the main board 15 and other heat-generating components such as the light source lamp of the lamp unit 13, and is exhausted to the outside of the housing 6 by the exhaust fan 16.
  • FIG. 6 the perspective view of the dust collection unit 3 with which the projection type display apparatus 1 of this embodiment is provided is shown.
  • the dust collection unit 3 of the present embodiment flows dust from the intake louver 20 into which external air mixed with dust is sucked and air sucked through the intake louver 20, and collects dust. And a dust collection box 21 to be removed.
  • the dust collection box 21 is formed in a box shape, and has an intake port 23 for taking in air, and first and second exhaust ports 24a and 24b for exhausting air taken in from the intake port 23. Yes.
  • the dust collection box 21 has an inlet port 23 formed at the open end, and circular first and second exhaust ports 24a and 24b are formed opposite to each other on a pair of side surfaces.
  • the dust collection unit 3 includes the first and second air filters 26 and 27 that have elastic collecting surfaces 33 and 34 on which dust is accumulated, and the first and second air filters 26 and 27.
  • First and second filter support frames 28 and 29 as support bodies for supporting the collecting surfaces 33 and 34 from the upstream side of the air filters 26 and 27, and the first and second air filters 26 and 27 are passed.
  • first and second cooling fans 31 and 32 for sending the air to the LCD unit.
  • the first and second air filters 26 and 27 are disposed between the intake port 23 and the exhaust ports 24a and 24b. In the first and second air filters 26 and 27, when the collecting surfaces 33 and 34 facing the exhaust ports 24a and 24b are clogged, the entire collecting surfaces 33 and 34 on the same surface face the downstream side.
  • the first and second filter support frames 28 and 29 are supported so as to be elastically deformable so as to swell. That is, when the first and second air filters 26 and 27 are elastically deformed, the size of the eyes of the collection surfaces 33 and 34 changes.
  • the first and second air filters 26 and 27 and the first and second filter support frames 28 and 29 are arranged inside the dust collection box 21, respectively.
  • the first and second exhaust ports 24 a and 24 b are provided on the surface of the dust collection box 21 that faces the collection surfaces 33 and 34. Moreover, each exhaust port 24a, 24b is formed in the position which the opening area is formed smaller than the collection surfaces 33 and 34, and opposes the center part of the collection surfaces 33 and 34 of the dust collection box 21. As shown in FIG.
  • the first cooling fan 31 and the second cooling fan 32 are arranged to face both side surfaces of the dust collection box 21.
  • the suction ports of the first cooling fan and the second cooling fans 31 and 32 are communicated with the first and second exhaust ports 24 a and 24 b of the dust collection box 21.
  • the pair of first cooling fan 31 and second cooling fan 32 sucks air from which dust has been removed by the first and second air filters 26 and 27 from the first and second exhaust ports 24a and 24b. Then, it is sent to the LCD unit through the LCD unit air duct 18.
  • FIG. 7 is a perspective view showing a state in which the first cooling fan 31 and the second cooling fan 32 arranged opposite to the both sides of the dust collection box 21 are removed from the dust collection box 21.
  • FIG. 8 shows a perspective view of the dust collection unit 3 cut along a horizontal plane including the central axis of the dust collection box 21.
  • the inside of the dust collection box 21 is provided with a first filter support frame 28 and a second filter support frame 29 having a cylindrical cage frame structure.
  • the first filter support frame 28 and the second filter support frame 29 respectively support the first air filter 26 and the second air filter 27 that are formed in a rectangular tube shape by a porous material such as sponge. It has a double structure.
  • the air that has flowed in through the intake louver 20 from the outside of the dust collection unit 3 passes through each square tube-shaped first air filter 26 supported by the first filter support frame 28 arranged on the inside. (Collecting dust at the first stage) After passing through the second air filter 27 having a rectangular tube shape supported by the second filter support frame 29 (collecting dust at the second stage), The circular first exhaust port 24a and the second exhaust port 24a provided on the side surface of the dust collection box 21 are divided along the inner wall surface of the dust collection box 21 toward the first exhaust port 24a and the second exhaust port 24b. 2 exhaust port 24b.
  • These air flows are generated by the first exhaust port 24 a and the second exhaust port generated by the intake force of the pair of first cooling fan 31 and second cooling fan 32 provided on both sides of the dust collection box 21. It is made by the differential pressure between the pressure by 24b and the outside.
  • sirocco fans multi-blade fans
  • the first cooling fan 31 and the second cooling fan 32 sandwich the air filters 26 and 27 disposed in the dust collection box 21 so that the suction ports of the cooling fans 31 and 32 face each other.
  • the static pressure is set to about 35 mmAq.
  • FIG. 9 is a perspective view of the dust collection unit 3 cut along a vertical plane including the central axis of the dust collection box 21. With reference to FIG. 9, a double-structured filter support structure will be described.
  • the second filter support frame 29 that supports the square tube-shaped second air filter 27 includes a flange portion 29b, which will be described later, formed at one end portion on the intake louver 20 side, and a dust collection box.
  • the protrusions formed on the flange portion 21a of the 21 are positioned by an uneven fitting structure.
  • the other end of the second filter support frame 29 is provided with two filter support protrusions 37, which will be described later, formed at two locations in the vertical direction in FIG. Each filter support hole 38 is inserted and positioned and fixed.
  • the support structure of the first air filter 26 is a protrusion structure of the flange portion 29b of the second filter support frame 29 that supports the second air filter 27, and a support structure of the filter support protrusion 37 and the filter support hole 38. And have.
  • FIG. 10 shows an exploded perspective view in which the components in the dust collection box 21 are cut along a vertical plane including the central axis of the dust collection box 21.
  • the second filter support frame 29 has two filter support holes 38 provided in the bottom surface portion of the dust collection box 21 and two filter support frames 29 provided in the bottom portion of the second filter support frame 29.
  • the filter support projection 37 is engaged and positioned and fixed.
  • the convex projections formed in a rectangular frame shape provided on the flange portion 21 a of the dust collection box 21 and the flange portion 29 b of the second filter support frame 29 are provided.
  • the groove is positioned and fixed by fitting with a concave groove formed in a square shape.
  • the first filter support frame 28 is engaged with a filter support hole 36 provided at the bottom of the second filter support frame 29 and a filter support protrusion 35 provided at the bottom of the first filter support frame 29. Positioning and fixing. At the same time, a convex protrusion formed in a square frame shape provided on the flange portion 29b of the second filter support frame 29 and a square shape provided on the flange portion 28b of the first filter support frame 28. It is positioned and fixed by fitting with the concave groove formed in. After the first and second filter support frames 28 and 29 that support the first and second air filters 26 and 27 are fixed, the intake louver 20 is attached to the frame portion of the flange portion 21a of the dust collection box 21. Positioned and fixed.
  • FIG. 11 shows a perspective view of the second filter support frame 29
  • FIG. 12 shows a perspective view of the second filter support frame 29 with the second air filter 27 attached thereto.
  • the configuration of the second filter support frame 29 disposed on the outside will be described.
  • the configuration in which the first filter support frame 28 supports the first air filter 26 as shown in FIG. The same as the second filter support frame 29.
  • the second filter support frame 29 has a cage-shaped frame portion 29 a that supports the second air filter 27, and a flange portion 29 b that is supported by the dust collection box 21. .
  • a square frame-shaped bottom is formed at a position on the opposite side of the flange 29b of the frame 29a.
  • a convex filter support protrusion 37 is provided in order to position the second filter support frame 29 with respect to the dust collection box 21 on this bottom.
  • a convex filter support protrusion 37 is provided in order to position the second filter support frame 29 with respect to the dust collection box 21 on this bottom.
  • a filter support hole 36 for positioning the first filter support frame 28 with respect to the second filter support frame 29 is provided at the bottom.
  • a square tube-shaped second air filter 27 is supported at a predetermined position on the outer peripheral portion of the frame portion 29a.
  • the frame portion 29a plays a role of collecting dust by the second air filter 27 by allowing air with dust flowing in from the opening in which the flange portion 29b is formed to pass from the inside to the outside.
  • the flange portion 29b is formed around the opening of the frame portion 29a, and knobs 29c for taking out the filter structure portion from the dust collection box 21 are provided on both sides of the opening portion of the frame portion 29a. Yes.
  • a concave groove for positioning the second filter support frame 29 at a predetermined position in the dust collection box 21 is provided on the back surface of the flange portion 29b. This groove is formed in a rectangular frame shape along the outer periphery of the flange portion 29b.
  • the first filter support frame 28 has a frame portion 28a that supports the first air filter 26, and a flange portion 28b that is supported by the dust collection box 21 via the flange portion 29b of the second filter support frame 29. And have.
  • a square frame-shaped bottom portion is formed at a position opposite to the flange portion 28 b of the frame portion 28 a of the first filter support frame 28, and the second filter support frame 29 is formed on this bottom portion.
  • a convex filter support projection 35 for positioning the first filter support frame 28 is provided.
  • the first and second filter support frames 28 and 29 are detachably supported by the dust collection box 21, respectively, the first and second filter support frames 28 and 29 are attached to the dust collection box. 21 can be easily removed and replaced.
  • the first and second air filters 26 and 27 supported by the first and second filter support frames 28 and 29, respectively, are formed in a rectangular tube shape with one end side closed. It has collection surfaces 33 and 34, respectively.
  • the first and second air filters 26 and 27 are disposed outside the frame portions 28a and 29a of the first and second filter support frames 28 and 29, and are upstream of the frame portions 28a and 29a. It is supported from.
  • the first and second air filters 26, 27 have a collection surface 33, 34 as compared with a collection surface of a general flat air filter supported in parallel with the opening surface of the intake louver 20.
  • the total area is equivalent to about 5 times. For this reason, the time required for clogging is extended by about five times, and the ventilation resistance for the cooling fans 31 and 32 to suck in air from the outside is reduced.
  • the dust collected on the collection surfaces 33 and 34 (the upstream surfaces in the ventilation direction) of the first and second air filters 26 and 27 is accumulated inside the rectangular tube. . Therefore, since the collection surfaces 33 and 34 of the first and second air filters 26 and 27 are separated from the intake surface of the intake louver 20, the first and second air filters 26 and 27 are separated from each other as in the configuration using a general air filter. The dust collected by the second air filters 26, 27 can be prevented from spilling from the intake louver 20. For this reason, even when the projection display device 1 is used for a long time, the intake louver 20 constituting a part of the housing is contaminated with dust collected by the first and second air filters 26 and 27. Is avoided.
  • the respective collecting surfaces 33 and 34 of the first and second air filters 26 and 27 are stored. And the opening area of the intake louver 20 are not correlated. That is, there is no direct relationship between the opening area of the intake louver 20 and the time taken until the first and second air filters 26 and 27 are clogged.
  • the opening area of the intake opening of the intake louver 20 can be made small, and noise such as the cooling fans 31 and 32 generated in the projection display device 1 is confined in the housing 6, so that the housing 6 Noise that leaks to the outside can be reduced.
  • the porous structure of each air filter 26, 27 has a sound absorbing effect, and in particular, a noise component having a frequency of 1 kH or more. Can be reduced.
  • noise can be reduced by about 3 dB.
  • FIG. 13A is a cross-sectional view schematically showing the exhaust port 24b side of the dust collection box 21 by cutting the dust collection unit 3 along a horizontal plane.
  • a broken line indicates the flow of air
  • a black circle indicates dust.
  • the air with dust which is sucked from the outside of the dust collection unit 21 through the suction louver 20, enters the inside from the opening of the first filter support frame 28.
  • the first air filter 26 disposed inside the second air filter 27 has a relatively coarse mesh, a cell size of 30 cells / inch, and a thickness of 2 mm.
  • the second air filter 27 disposed outside the first air filter 26 has a relatively fine mesh, a cell size of 50 cells / inch, and a thickness of 2 mm. That is, the diameter of the cell constituting the second air filter 27 arranged on the downstream side is smaller than half the cell of the first air filter 26 arranged on the upstream side, and the second air filter 27 is As compared with the first air filter 26, finer dust is collected.
  • air with dust is first collected by the first air filter 26 as medium-sized dust M having a size of about 500 ⁇ m to 850 ⁇ m.
  • the air that has passed through the first air filter 26 collects small-diameter dust S having a size of 500 ⁇ m or less by the second air filter 27.
  • the first and second air filters 26 and 27 have a total area of the collection surfaces 33 and 34 that is five times that of the collection surface of the air filter arranged parallel to the intake surface of the intake louver. To a large extent.
  • dust M having a size larger than the medium diameter is first removed, and then dust collection is performed in two stages of removing the dust S having a size from the small diameter to the medium diameter. The total area where dust can be collected is secured approximately 10 times.
  • FIG. 13B shows a case where the collection surfaces 33 and 34 of the first and second air filters 26 and 27 start to clog when the dust collection unit 3 of the present embodiment is used for a long time.
  • transformation state of the collection surfaces 33 and 34 of each air filter 26 and 27 is shown typically. Since the dust collection unit 3 is formed using a porous sponge filter having a thickness of 2 mm as the first and second air filters 26 and 27, it can be elastically deformed relatively easily by an external stress.
  • the first and second air filters 26 and 27 have the collecting surfaces 33 and 34 facing the first and second exhaust ports 24 a and 24 b of the first and second filter support frames 28 and 29. It extends along the outer periphery, and the collection surfaces 33 and 34 are formed so as to be easily elastically deformable.
  • the surfaces on the exhaust ports 24a and 24b side and the inner surfaces of the air filters 26 and 27 are arranged.
  • the pressure difference increases. Due to this pressure difference, as shown in FIG. 13 (b), the entire collecting surfaces 33, 34 on the same surface of the air filters 26, 27 swell and elastically deform.
  • the size of the eyes constituting the elastically deformed collection surfaces 33, 34 that is, the size of the cells changes slightly, so that already collected dust is discharged from the collection surfaces 33, 34, and each air Passes through filters 26 and 27. For this reason, the clogged state of the collection surfaces 33 and 34 of the air filters 26 and 27 is reduced.
  • the first and second air filters 26 and 27 include five collection surfaces 33 and 34, of the five collection surfaces 33 and 34, the collection facing the exhaust ports 24 a and 24 b.
  • the collecting surfaces 33 and 34 are effectively elastically deformed so as to bend toward the exhaust ports 24a and 24b on the same plane.
  • the second air filter 27 collects dust M having a medium diameter or larger.
  • Such elastic deformation of the collecting surface 34 occurs in substantially the same manner in each of the air filters 26 and 27 arranged in a double structure.
  • the 1st air filter 26 makes large diameter dust whose magnitude
  • one side of the collection surface 34 of the second air filter 27 in this embodiment is a 4 cm square, and is deformed to a slightly larger 6 cm square with elastic deformation caused by pressure changes on the upstream side and the downstream side.
  • the diameter of the cell is 1.5 times, and the diameter of the dust to be collected is also about 1.5 times. That is, the outer second air filter 27 shifts to the role that the inner first air filter 26 has been playing up to that time. That is, the second air filter 27 collects dust M having a medium diameter or larger.
  • the best mode is shown, and other embodiments include those having a multiple structure rather than a double structure.
  • a multiple structure a structure in which a plurality of air filters are arranged in a direct overlapping manner and the plurality of air filters are supported on a filter support frame is also exemplified.
  • the inner first filter support frame 28 is removed and only the second air filter 27 is attached.
  • the dust collection unit 3 may be used in the state. Further, the dust collection unit 3 itself may be configured to include only one air filter.
  • the cooling fans 31 and 32 are arranged at positions close to the air filters 26 and 27, but ducts extended from the exhaust ports 24 a and 24 b of the dust collection box 21 are used. As long as the cooling fan is connected to the cooling fan, the cooling fan functions in the same manner even if the cooling fan is arranged at another position.
  • the position of the exhaust port of the dust collection box must be arranged on a surface other than the surface perpendicular to the collection surface that is elastically deformed in the air filter configured in a rectangular tube shape, that is, on the surface facing the collection surface. is there.
  • the position of the exhaust port of the dust collection box is preferably arranged at a position facing the central portion of the collection surface that is elastically deformed.
  • each exhaust port of the dust collection box communicates with the intake port of each cooling fan via a duct.
  • the dust collector according to the present invention can be widely applied to electronic devices in general, but since the heat generation density of the liquid crystal display plate is relatively high, a high effect can be obtained in a liquid crystal projection display device.
  • a relatively large amount of cooling air is blown to the mounting component having a relatively high heat generation density, and the reduction of the cooling air greatly affects the temperature rise of the mounting component.
  • the air filter when the air filter is clogged, the amount of air blown by the cooling fan is greatly reduced, and the temperature of the optical parts such as the liquid crystal display plate and polarizing plate of the LCD unit is 40 ° C. or higher. May rise. As the temperature rises, the deterioration of optical components may progress, and the hue of the projected image may change.
  • the dust S having a relatively small diameter is positively collected.
  • the ventilation of the air filters 26 and 27 is ensured, and the cooling air blowing state by the cooling fans 31 and 32 is maintained.
  • small-diameter dust S having a diameter of 500 ⁇ m or less is released from the collection surface 34 of the second air filter 27, and the small-diameter dust S adheres to the LCD unit. For this reason, although the brightness of a projection image falls a little, the change of the color temperature (hue) of a projection image can be prevented.
  • the reason why the cooling fans 31 and 32 are operated to keep the air blown by discharging dust from the collecting surfaces 33 and 34 when the air filters 26 and 27 are clogged is that This is because the emphasis is on preventing changes in the hue of the projected image rather than reducing the brightness slightly.
  • the small-diameter dust discharged into the projection display device 1 is cleaned by performing a separate maintenance operation after the desired continuous operation time has ended.
  • FIG. 14 is an enlarged view of a configuration example of the intake louver 20 provided in the projection display device of the embodiment.
  • the opening area of the intake opening of the intake louver 20 is about half of the opening area of a general intake louver. For this reason, the flow velocity of the air that the intake louver 20 takes in from the outside is also almost doubled (2 m / s).
  • paper such as printed matter placed around the projection display device 1 may stick to the intake opening of the intake louver 20 and block the intake, so that it may not be possible to intake air. Therefore, as shown in FIG.
  • the intake louver 20 in the present embodiment is preferably provided with a pair of rectangular protrusions 20b and 20c along the outer periphery at both ends of the slit 20a. As a result, even when paper is stuck to the intake louver 20, a gap is secured between the projections 20b, 20c and the paper, and intake can be performed from the gap.
  • the collection surfaces 33 and 34 of the first and second air filters 26 and 27 are clogged by providing the dust collection unit 3.
  • a part of the dust collected on the collecting surfaces 33 and 34 can be released by the pressure difference generated between the front and back surfaces of the collecting surfaces 33 and 34. Therefore, this embodiment can reduce the clogged state of the air filters 26 and 27, and can avoid that the air volume by the cooling fans 31 and 32 reduces significantly. For this reason, the time taken until the air filters 26 and 27 are clogged can be remarkably extended, and the continuous operation time of the projection display device 1 can be extended.
  • the projection type display device 1 can reduce deterioration or failure of the mounting component due to the temperature rise of the mounting component. Further, since the first and second air filters 26 and 27 are formed in a rectangular tube shape, dust adhering to the collection surfaces 33 and 34 can be prevented from spilling from the intake louver 20 to the outside of the housing 6. . Further, the dust collection unit 3 has a configuration in which the first and second air filters 26 and 27 are formed in a rectangular tube shape, and the first air filter 26 is disposed inside the second air filter 27. The dust collecting unit 3 can be reduced in size, and noise from the cooling fans 31 and 32 can be suppressed.
  • FIG. 15 is a perspective view of the projection display apparatus according to the second embodiment.
  • the projection display device of the second embodiment is different from a general projection display device in that a dust collection unit is attached later.
  • the dust collection unit included in the projection display device of the second embodiment is substantially the same in basic structure as the dust collection unit in the first embodiment described above, except that the cooling fan is not provided. Only different configurations will be described.
  • the same components as those in the first embodiment are denoted by the same reference numerals as those in the first embodiment for the sake of convenience, and description thereof is omitted.
  • the projection type display device of the second embodiment is configured by attaching a flat plate air filter in parallel to the intake surface of the intake louver. Instead of this flat air filter, as shown in FIG. 15, the projection display device 2 of the second embodiment is configured by attaching a dust collection unit 4 later.
  • the dust collection unit 4 includes the dust collection box 21, the first and second air filters 26 and 27, and the first and second filter support frames 28 and 29. And in the dust collection unit 4, the cooling fans 31 and 32 previously incorporated in the projection type display apparatus 2 are utilized as a cooling fan.
  • the dust collection box 21 in the first embodiment described above is covered with a casing 41 as shown in FIG.
  • the exhaust ports 42 a and 42 b of the dust collection box 21 and the cooling fans 31 and 32 disposed in the housing 6 are communicated with each other through the opening 6 a of the housing 6.
  • the casing 41 is formed in a box shape, and one end is detachably attached to the opening 6 a of the housing 6.
  • the other end of the casing 41 is provided with an intake louver 42 for taking outside air into the first air filter 26 disposed inside.
  • the intake louver 42 is provided with a pair of protrusions, similar to the intake louver 20 shown in FIG.
  • the dust collection unit 4 is configured to be attachable to and detachable from an opening 6 a located on the opposite side surface of the housing 6 where the projection lens 11 is disposed.
  • the dust collection unit 3 is disposed so as to extend to the opposite side of the projection optical axis of the projection lens 11.
  • the dust collecting unit 3 can be mounted without obstructing the projection optical axis without reducing the degree of freedom in adjusting the position of the projection optical axis, and the collecting surfaces 33 and 34 of the air filters 26 and 27 are elongated. A degree of freedom to extend in the direction can be secured.
  • the time taken until an air filter is clogged can be extended significantly similarly to embodiment mentioned above.
  • the direction in which the dust collection unit 4 is used to increase the area of the collection surfaces 33 and 34 of the air filters 26 and 27 sufficiently to ensure a square cylindrical air This is the longitudinal direction (center axis direction) of the filters 26 and 27.
  • the area of the collection surfaces 33 and 34 of the air filters 26 and 27 can be easily increased by removing the intake louver from the housing 6 and adding the dust collection unit 4 as a retrofit. It is.
  • the configuration of the air filter is restricted by the internal structure of the projection display device. For this reason, in order to attach the dust collection unit to the casing by retrofitting, it is necessary to replace the casing with a shape corresponding to the dust collection unit.

Landscapes

  • Engineering & Computer Science (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Physics & Mathematics (AREA)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Thermal Sciences (AREA)
  • General Physics & Mathematics (AREA)
  • Cooling Or The Like Of Electrical Apparatus (AREA)
  • Projection Apparatus (AREA)

Abstract

L'invention porte sur un dispositif collecteur de poussière qui comprend des premier et second filtres à air (26, 27) élastiquement déplaçables, placés entre une ouverture d'aspiration d'air (23) et une ouverture de refoulement d'air (24a) et présentant des surfaces de capture (33, 34) sur lesquelles la poussière s'accumule, des premier et second cadres de support de filtre (28, 29) pour supporter les surfaces de capture (33, 34) des premier et second filtres à air (26, 27) par le côté amont des premier et second filtres à air (26, 27), et un ventilateur de refroidissement pour envoyer, à un corps générateur de chaleur, de l'air ayant été fait passer à travers les premier et second filtres à air (26, 27). La taille de maille des surfaces de capture (33, 34) varie quand les premier et second filtres à air (26, 27) sont élastiquement déformés.
PCT/JP2009/065313 2009-09-02 2009-09-02 Appareil collecteur de poussière, appareil électronique et appareil d'affichage par projection le comprenant tous les deux, et procédé de collecte de poussière WO2011027424A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
PCT/JP2009/065313 WO2011027424A1 (fr) 2009-09-02 2009-09-02 Appareil collecteur de poussière, appareil électronique et appareil d'affichage par projection le comprenant tous les deux, et procédé de collecte de poussière
JP2011529717A JP5119507B2 (ja) 2009-09-02 2009-09-02 集塵装置及び集塵方法

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/JP2009/065313 WO2011027424A1 (fr) 2009-09-02 2009-09-02 Appareil collecteur de poussière, appareil électronique et appareil d'affichage par projection le comprenant tous les deux, et procédé de collecte de poussière

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WO2011027424A1 true WO2011027424A1 (fr) 2011-03-10

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JP2011209383A (ja) * 2010-03-29 2011-10-20 Seiko Epson Corp プロジェクター
CN104765229A (zh) * 2014-01-03 2015-07-08 索尼公司 一种投影机的防尘过滤结构及具有该结构的投影机
JPWO2015182029A1 (ja) * 2014-05-28 2017-04-20 ソニー株式会社 画像表示装置、フィルタユニット、及び電子機器
WO2018105010A1 (fr) * 2016-12-05 2018-06-14 東芝三菱電機産業システム株式会社 Dispositif de refroidissement à air pulsé
CN112424688A (zh) * 2018-05-25 2021-02-26 夏普Nec显示器解决方案株式会社 电子设备和投影仪
CN112930092A (zh) * 2021-02-22 2021-06-08 深圳市中电华星电子技术有限公司 一种铁路电源的散热组件及其使用方法
JP2021184586A (ja) * 2020-05-21 2021-12-02 株式会社エクサウィザーズ 撮像装置

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JP2004157347A (ja) * 2002-11-07 2004-06-03 Seiko Epson Corp プロジェクタ

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JPS63294911A (ja) * 1987-05-27 1988-12-01 Nippon Kaihatsu Consultant:Kk 濾過機
JPH0460364A (ja) * 1990-06-26 1992-02-26 Fujitsu Ltd 冷却用ファンを備えた装置のホコリ防止法
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Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2011209383A (ja) * 2010-03-29 2011-10-20 Seiko Epson Corp プロジェクター
CN104765229A (zh) * 2014-01-03 2015-07-08 索尼公司 一种投影机的防尘过滤结构及具有该结构的投影机
JPWO2015182029A1 (ja) * 2014-05-28 2017-04-20 ソニー株式会社 画像表示装置、フィルタユニット、及び電子機器
WO2018105010A1 (fr) * 2016-12-05 2018-06-14 東芝三菱電機産業システム株式会社 Dispositif de refroidissement à air pulsé
JPWO2019225680A1 (ja) * 2018-05-25 2021-06-10 シャープＮｅｃディスプレイソリューションズ株式会社 電子機器およびプロジェクタ
CN112424688A (zh) * 2018-05-25 2021-02-26 夏普Nec显示器解决方案株式会社 电子设备和投影仪
JPWO2019224992A1 (ja) * 2018-05-25 2021-06-24 シャープＮｅｃディスプレイソリューションズ株式会社 電子機器およびプロジェクタ
JP6995985B2 (ja) 2018-05-25 2022-01-17 シャープＮｅｃディスプレイソリューションズ株式会社 電子機器およびプロジェクタ
JP6995986B2 (ja) 2018-05-25 2022-01-17 シャープＮｅｃディスプレイソリューションズ株式会社 電子機器およびプロジェクタ
US11415869B2 (en) 2018-05-25 2022-08-16 Sharp Nec Display Solutions, Ltd. Electronic device and projectors
JP2021184586A (ja) * 2020-05-21 2021-12-02 株式会社エクサウィザーズ 撮像装置
CN112930092A (zh) * 2021-02-22 2021-06-08 深圳市中电华星电子技术有限公司 一种铁路电源的散热组件及其使用方法
CN112930092B (zh) * 2021-02-22 2022-10-11 广州神铁牵引设备有限公司 一种铁路电源的散热组件及其使用方法

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