WO2012105208A1 - 集塵フィルターユニット、投写型画像表示装置、及び空気清浄機 - Google Patents
集塵フィルターユニット、投写型画像表示装置、及び空気清浄機 Download PDFInfo
- Publication number
- WO2012105208A1 WO2012105208A1 PCT/JP2012/000542 JP2012000542W WO2012105208A1 WO 2012105208 A1 WO2012105208 A1 WO 2012105208A1 JP 2012000542 W JP2012000542 W JP 2012000542W WO 2012105208 A1 WO2012105208 A1 WO 2012105208A1
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- WIPO (PCT)
- Prior art keywords
- filter
- filter unit
- support
- unit according
- dust
- Prior art date
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Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03C—MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03C3/00—Separating dispersed particles from gases or vapour, e.g. air, by electrostatic effect
- B03C3/34—Constructional details or accessories or operation thereof
-
- 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
-
- 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
- B01D46/52—Particle separators, e.g. dust precipitators, using filters embodying folded corrugated or wound sheet material
- B01D46/521—Particle separators, e.g. dust precipitators, using filters embodying folded corrugated or wound sheet material using folded, pleated material
- B01D46/523—Particle separators, e.g. dust precipitators, using filters embodying folded corrugated or wound sheet material using folded, pleated material with means for maintaining spacing between the pleats or folds
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- 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
- G03B21/16—Cooling; Preventing overheating
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2265/00—Casings, housings or mounting for filters specially adapted for separating dispersed particles from gases or vapours
- B01D2265/06—Details of supporting structures for filtering material, e.g. cores
-
- 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
Definitions
- the present invention relates to a dust collection filter unit using a plate filter for capturing dust, a projection-type image display device using the dust collection filter unit, and an air cleaner using the dust collection filter unit.
- a projection type image display apparatus condenses powerful light from a light source on an image display element such as a liquid crystal panel or a digital mirror device (DMD), and modulates the light according to an image signal.
- the upper image is enlarged and projected to obtain a large screen.
- the projection type image display apparatus generates a large amount of heat from the image display element, the light source, and the apparatus power source that are exposed to strong light, and is thermally destroyed unless it is properly cooled. Therefore, the projection type image display apparatus has a configuration in which outside air is introduced into the apparatus by a fan to cool the inside of the apparatus.
- a dust collection filter that suppresses dust intrusion is disposed at the air inlet.
- the dust collection filter is necessary not only for the projection type image display device but also for other devices such as an air purifier.
- a foamed urethane filter is generally used as a dust collection filter. The foamed urethane filter can be reused by cleaning the filter every several hundred hours. However, the foamed urethane filter is rough and cannot capture pollen or fine dust of 1 ⁇ m or less.
- the electrostatic filter is a filter medium made of charged chemical fiber and capable of capturing minute dust using static electricity.
- the electrostatic filter also has the advantage that the eyes are rough and the pressure loss of the air passing therethrough is small.
- dust collection efficiency due to the charging effect decreases due to dust adhesion.
- the electrostatic filter can remove dust by washing with water, but the charge on the fiber surface is also lost, so the dust collection efficiency is extremely lowered. Therefore, the electrostatic filter cannot be reused and has a problem of being disposable. In order to solve this problem, reproducible electrostatic filters have been proposed (Patent Documents 1 and 2).
- a pleated filter is often used for a dust collection filter attached to a suction port of an apparatus such as a projection image display apparatus or an air purifier in order to extend the filter replacement time in a limited area.
- the pleated filter is a filter formed by folding a filter material in a zigzag manner.
- a conventional pleated filter has such a hardness that it can maintain its shape as a single unit.
- the outer periphery is supported by a frame.
- a renewable electrostatic filter includes a cloth material (for example, non-woven fabric) made of two or more different types of chemical fibers, and is recharged by friction between the chemical fibers. Therefore, such an electrostatic filter cannot fix a chemical fiber, is flexible and easily collapses in shape. It is difficult to maintain the shape of such an electrostatic filter only with the cloth material, and the shape of the electrostatic filter collapses when left in a pleated shape. In particular, when the cleaning operation is performed, the shape collapse becomes remarkable.
- an object of the present invention is to provide a dust collection filter unit that solves the problem of the deformation of the shape of the plate filter, a projection-type image display device that uses the dust collection filter unit, and an air that uses the dust collection filter unit. It is to provide a purifier.
- a dust collection filter unit of the present invention is provided in a pleat filter formed by bending a filter material, a frame body in which a vent hole for attaching the pleat filter is formed, and the vent hole, And supporting means for supporting a plurality of bent portions of the pleated filter and maintaining the shape of the pleated filter.
- the support means may be provided with a plurality of support columns that are supported by the frame body and each support different bent portions.
- the bent portion of the plate filter may be fixed to the support column.
- the bent portion of the plate filter may be embedded in the support column.
- the outer peripheral part of the said plate filter may be embed
- the plate filter may be embedded in the frame and the support column by insert molding when the frame and the support column are molded.
- the pleated filter has an elevation difference between the peaks and valleys (the length in the valley direction of the plate filter) when each bent portion is a peak or valley, and the adjacent bent portions on one side of the plate filter.
- the bending pitch between them is P, the relationship of L / P ⁇ 3 may be satisfied.
- the pleated filter includes a filter part that captures dust on the intake side through which air enters, and a filter part that is less flexible than the filter part on the exhaust side from which the air from which dust has been removed is discharged.
- a reinforcement net for reinforcement of may be arranged.
- the part which functions as an electrostatic filter may consist of the mixed fiber of at least 2 types of synthetic fiber.
- the plate filter may have a thickness of 1 mm or more.
- the support pillar may be formed integrally with the frame.
- the plurality of support pillars may be provided for a part of the plurality of bent portions of the plate filter. Further, the support pillars may be provided every other plurality of bent portions on the inlet side of the plate filter.
- the plurality of support pillars may be configured such that the number of support pillars supporting the bent part on the exhaust side of the plate filter is equal to or less than the number of support pillars supporting the bent part on the intake side of the plate filter. Good.
- a recess that does not support the plate filter may be formed between the portions that support the bent portion of the plate filter.
- the dust collection filter unit may be provided in the intake portion of the projection type image display device. Further, the dust collection filter unit may be provided in an air intake part of an air cleaner.
- the shape of the pleated filter is maintained by supporting a plurality of bent portions of the pleated filter, it is possible to suppress the function of the pleated filter from being deteriorated due to the collapse of the shape. .
- this dust collection filter unit for a projection type image display device, it becomes possible to suppress a decrease in brightness and color unevenness due to dust adhesion over a long period of time with high dust collection performance.
- a reusable electrostatic filter when used, maintenance costs can be reduced by cleaning and regenerating even if clogging occurs with dust.
- FIG. 1 is a cross-sectional view of an air cleaner according to Embodiment 1.
- FIG. FIG. 2 is a cross-sectional view of the dust collection filter unit in the first embodiment.
- FIG. 3 is a perspective view of a filter frame in which the electrostatic filter is omitted in the first embodiment.
- FIG. 4 is an enlarged view of a bent portion of the electrostatic filter in the first embodiment.
- FIG. 5 is a chart for explaining the optimum value of L / P in the electrostatic filter.
- FIG. 6 is another perspective view of the dust collection filter unit 1 according to the first embodiment, and is a perspective view in which an electrostatic filter is omitted.
- FIG. 7 is a cross-sectional view of alternative 2 of the dust collection filter unit in the first embodiment.
- FIG. 8 is another perspective view 3 of the dust collection filter unit according to Embodiment 1, and is a perspective view in which the electrostatic filter is omitted.
- FIG. 9 is a schematic configuration diagram showing a projection type image display apparatus according to the second embodiment.
- FIG. 10 is a cross-sectional view of the dust collection filter unit in the second embodiment.
- FIG. 1 is a cross-sectional view of the air cleaner 155 according to Embodiment 1 of the present invention
- FIG. 2 is a cross-sectional view of the dust collection filter unit 100
- FIG. 3 omits the electrostatic filter 105.
- 3 is a perspective view of a filter frame 106.
- the housing 101 includes an intake portion 102 and an exhaust portion 103.
- the housing 101 includes an axial fan 104 driven by an external power source and a dust collection filter unit 100 disposed on the intake side thereof.
- the dust collection filter unit 100 includes an electrostatic filter 105 and a filter frame 106 in which a vent hole for attaching the electrostatic filter 105 is formed.
- the outer periphery of the electrostatic filter 105 is embedded in the filter frame 106 by insert molding.
- the electrostatic filter 105 is inserted when the filter frame 106 is molded, and the electrostatic filter 105 is inserted into the resin of the filter frame 106.
- the outer peripheral part (peripheral part) of 105 is stored.
- Insert molding is a molding technique in which the filter frame 106 is resin-molded with the electrostatic filter 105 inserted into the mold of the filter frame 106.
- the filter frame 106 is configured to be detachable from the housing 101.
- the outside air sucked from the intake portion 102 of the housing 101 is passed through the pleated electrostatic filter 105 by the rotation of the axial fan 104, so that the dust in the outside air is captured by the electrostatic filter 105. can do.
- the air from which the dust has been removed in this manner is discharged from the exhaust portion 103 of the housing 101, and purified air can be provided.
- the filter ventilation area can be increased, and the time until clogging with the trapped dust can be extended.
- FIG. 2 is an enlarged view of the dust collection filter unit 100 provided with the electrostatic filter 105 in the filter frame 106.
- a support wall 107 (a plate-like support column (slit column)) is formed at the same time as the filter frame 106 is molded with respect to a folded portion (vertex portion) of a mountain fold constituting pleats (folds). . Since the electrostatic filter 105 and the support wall 107 are integrated, the electrostatic filter 105 is fixed and maintained in a pleated shape.
- the support wall 107 is provided with respect to all the bending parts (part consisting of the vertex of bending and its peripheral part). Among the plurality of support walls 107, a part constitutes an intake side support wall extending along the air flow direction on the intake side of the filter frame 106, and the rest constitutes the exhaust side of the filter frame 106 along the air flow direction. An extended exhaust side support wall is formed. A bent portion of the electrostatic filter 105 (a bent portion that becomes a valley when the dust collection filter unit 100 is placed with the intake side facing upward as shown in FIG. 2) is located at the exhaust-side end of the intake-side support wall 107. Buried.
- the electrostatic filter 105 At the end of the exhaust side support wall 107 on the intake side, there is a bent portion of the electrostatic filter 105 (a bent portion that becomes a mountain when the dust collection filter unit 100 is placed with the intake side facing up as shown in FIG. 2). Buried. Each of these bent portions is fixed to the support wall 107. A portion of the support wall 107 that is integral with the electrostatic filter 105 is a support portion 109. In addition, the outer periphery of the electrostatic filter 105 is embedded in the filter frame 106. The electrostatic filter 105 is fixed to the filter frame 106. The electrostatic filter 105 is embedded in the filter frame 106 and the support wall 107 by insert molding when the filter frame 106 and the support wall 107 are formed as described above.
- the electrostatic filter 105 is composed of a nonwoven fabric portion (filter portion) of a mixed fiber material of two different types of synthetic fibers and a reinforcing net 108 for supporting the nonwoven fabric portion.
- the reinforcing net 108 is integrated with the nonwoven fabric portion so as to cover one side of the nonwoven fabric portion.
- the reinforcing net 108 is a net that is more difficult to bend than the nonwoven fabric portion. By providing the reinforcing net 108, the collapse of the shape of the electrostatic filter 105 is reduced.
- a reinforcing net is disposed on the exhaust side of the nonwoven fabric portion.
- the synthetic fiber used for the electrostatic filter 105 may be three or more types.
- the electrostatic filter 105 in the first embodiment captures dust, and when the air permeability deteriorates due to the accumulation of dust, the electrostatic force is temporarily removed in the same manner, After drying, the electrostatic force is recovered by causing friction between the different types of synthetic fibers, and the dust collection performance can be obtained again.
- an electrostatic filter 105 In addition, in order to generate friction between synthetic fibers, it is desirable to take measures such as including an electrostatic filter 105. However, by attaching the dust collection filter unit 100 to the housing 101 again and allowing ventilation, friction between synthetic fibers is generated by a certain amount of air movement, and the electrostatic force is recovered. However, in order to generate friction between the synthetic fibers by the movement of air, the synthetic fibers are not fixed and need some allowance for movement.
- the electrostatic filter 105 is a flexible non-woven fabric and swings with the passage of air. Therefore, the total thickness of the reinforcing net 108 for maintaining the shape is 1 mm or more, which is thick compared to about 0.3 to 0.4 mm of a normal electrostatic filter.
- the pitch of conventional pleated filters is mainly about 5 mm regardless of the depth.
- the electrostatic filter 105 according to the first embodiment is weak in elasticity (strain) and unstable in shape even when the reinforcing net 108 is added for the above-described reason, and it is difficult to maintain the shape of the electrostatic filter 105. It is. Therefore, as shown in FIG. 2, the electrostatic filter 105 has a height difference (length in the pleat depth direction) between the peaks and valleys when each bent portion is a peak or valley, and one side of the electrostatic filter 105. It is desirable that L / P ⁇ 3, where P is the bending pitch (pitch between pleat peaks) between adjacent bent portions. This point will be described.
- FIG. 4 shows the height difference between the peaks and valleys when the bent portions are peaks or valleys (the length of the electrostatic filter 105 (filter medium) in the direction of peaks and valleys) (L) is 25 mm. It shows the equipment state of the bent part. In FIG. 4, the bent portion of the electrostatic filter 105 contacts the right side of the support wall 107.
- the dimension shown on the left side shows the opening amount (P / 2) of a half pitch corresponding to each L / P, and the dimension shown on the right side is in contact with the support wall 107 due to the deflection of the electrostatic filter 105 and collects dust. Shows the length of the portion that becomes the capacity reduction area.
- FIG. 5 shows the filter area enlargement ratio and the like when the dimensions of the electrostatic filter 105 are assumed from the most common preconditions.
- the dimensions in the case of FIG. 5 are such that the height difference (L) between the peaks and valleys is 25 mm, the thickness of the electrostatic filter 105 is 1 mm, and the thickness of the support wall 107 is 1 mm. It is. Further, it is assumed that the deflection amount of the electrostatic filter 105 is half the thickness of the electrostatic filter 105 (0.5 mm). In FIG. 4, the value at an arbitrary peak portion is described. In this figure, the same deflection occurs at the left end of the filter, and a loss due to this occurs. This is twice the range (X).
- the filter area expansion rate A is expressed by equation 1
- the filter effective rate B is expressed by equation 2
- the filter effective expansion rate C is expressed by equation 3.
- the electrostatic filter 105 is comprehensively determined from the filter effective expansion rate with respect to the vent area and the filter effective rate from the cost aspect.
- the filter effective enlargement ratio is large, and considering the cost aspect, it is desirable that the filter effective ratio is large.
- D B ⁇ C
- FIG. 3 is a perspective view of the filter frame 106 excluding the electrostatic filter 105 in order to make it easy to grasp the structure of the filter frame 106.
- the support portion 109 integrated with the electrostatic filter 105 in the support wall 107 is arranged in the height direction of the support wall 107 so that an effective area functioning as a filter in the electrostatic filter 105 is not reduced. It is desirable to be as short as possible.
- the recess 161 is formed on the side of the support wall 107 where the electrostatic filter 105 is embedded in the thickness direction of the filter frame 106.
- Such a recess 161 may be provided in the support pillar 110 described later.
- the electrostatic filter 105 may be fixed to the support wall 110 with an adhesive without embedding the electrostatic filter 105 in the support wall 110.
- the shape of the electrostatic filter 150 may be maintained by bringing the support wall 110 into contact with the electrostatic filter 105 without fixing the electrostatic filter 105 to the support wall 110.
- FIG. 7 shows a further alternative of the filter frame 106.
- the support column 110 that supports the electrostatic filter 105 is configured to be as small as possible, and the filter frame 106 is configured so as not to affect the ventilation as much as possible.
- the support pillar 110 occupies only the bent portion and the vicinity thereof in a sectional view.
- support pillars 110 may be provided for some of the plurality of bent portions of the electrostatic filter 105.
- every other support column 110 may be provided in a plurality of bent portions on the intake port side of the electrostatic filter 105.
- FIG. 8 is a perspective view of the filter frame 106 excluding the electrostatic filter 105 as seen from the intake side for easy understanding. In this way, by disposing the support pillars 110 every other mountain in the pleat shape, the effective area of the electrostatic filter 105 is prevented from being damaged due to the support described above.
- the number of support columns supporting the bent portion on the exhaust side of the electrostatic filter 105 may be equal to or less than the number of support columns 110 supporting the bent portion on the intake side of the electrostatic filter 105.
- the necessity of the support pillar 110 is large not only in performance but also in appearance. Therefore, particularly on the intake side that is easily visible from the outside, the support pillars 110 may be provided in every other pleat shape, and the support side 110 may be further reduced on the exhaust side. By doing in this way, it becomes possible to suppress the increase in the invalid region of the electrostatic filter 105.
- the shape of the electrostatic filter 105 is maintained by supporting the plurality of bent portions of the pleated electrostatic filter 105, the function of the electrostatic filter 105 due to the collapse of the shape. Can be prevented from decreasing. Further, by making the electrostatic filter 105 into a plate shape, it is possible to provide an air cleaner 155 that is easy to maintain.
- the configuration of the dust collection filter unit 110 described above is also effective for the projection type image display apparatus 150 shown below.
- a flexible dust collecting filter that captures dust with a mesh without using static electricity may be used.
- FIG. 9 is a diagram showing the structure of the projection-type image display device 150 according to Embodiment 2 of the present invention. Since the present invention does not relate to an optical configuration, the optical configuration will be briefly described below.
- the light emitted from the light source 111 is emitted forward by the reflecting mirror 112 and enters the optical unit 113.
- Incident light to the optical unit 113 is separated into red, green, and blue color light through dichroic mirrors 114 and 115 and total reflection mirrors 116, 117, and 118, and then incident-side polarizing plates 119R, 119G, and 119B, and liquid crystal.
- the panels 120R, 120G, and 120B and the output-side polarizing plates 121R, 121G, and 121B perform intensity modulation according to an input signal from the outside (not shown).
- the projection lens 124 is designed so that an image on the liquid crystal panels 120R, 120G, and 120B can be enlarged and projected onto a screen (not shown) disposed forward through a dust-proof glass 126 attached to the opening of the casing 125. is set up.
- the projection type image display device 150 for the black display, it is necessary to absorb the light from the light source 111 by the incident side polarizing plates 119R, 119G, and 119B and the outgoing side polarizing plates 121R, 121G, and 121B. Along with this, a high temperature is emitted.
- these polarizing plates 119R, 119G, 119B, 121R, 121G, and 121B are mainly made of an organic material, they are altered unless cooled to an appropriate temperature. If the polarizing plates 119R, 119G, 119B, 121R, 121G, and 121B are altered, the image cannot be controlled and becomes unusable.
- the projection type image display device 150 In addition to the above, in the projection type image display device 150, a light source tube that reaches 1000 degrees Celsius at the time of light emission, peripheral mechanical components, a light source and a power source 127 for image display have a large amount of self-heating. Therefore, the projection type image display apparatus 150 requires a cooling unit in order to ensure reliability.
- the outside air (relatively low temperature) is passed through the intake port 129, the prefilter 130, and the dust collection filter unit 100 provided on the side surface of the casing 125 by the intake fan 128 that is a blower unit. Air) is introduced into the housing 125.
- the air pushed in by the intake fan 128 stored in the intake duct 132 is guided to the optical unit duct 133 disposed in close contact with the fan outlet.
- the optical unit duct 133 has a blue opening and a green opening at positions corresponding to the lower portions of the incident side polarizing plates 119R, 119G, and 119B, the liquid crystal panels 120R, 120G, and 120B and the outgoing side polarizing plates 121R, 121G, and 121B.
- a red opening 134 is provided.
- the air guided to the optical unit duct 133 is blown into the optical unit 113 from these openings.
- the air blown out from these openings removes heat from the incident-side polarizing plates 119R, 119G, and 119B, the liquid crystal panels 120R, 120G, and 120B, and the outgoing-side polarizing plates 121R, 121G, and 121B, and then is drawn in by the exhaust fan 135.
- the operation of the sirocco fan 138 for the lamp is also helped, and the heat of the light source 111, its peripheral mechanism parts, and the power supply 127 is taken away.
- the projection type image display device 150 is designed to be heat-cooled so that they can be cooled at the same time. .
- the air reaching the exhaust fan 135 is blown out of the casing 125 through an exhaust port 139 provided in the casing 125.
- a pre-filter 130 is provided on the intake side of the dust collection filter unit 110 similar to that shown in the first embodiment.
- the pre-filter 130 itself is extremely difficult to clog in order to extend the clogging time, and a pre-filter 130 having a structure in which the charged film is assembled in a very coarse shape in a honeycomb shape (for example, a 3M ultra-low pressure loss filter). Used.
- the prefilter 130 is press-fitted and supported at the intake side end of the filter frame 140.
- the filter frame 140 is provided with a partition 141 at the center thereof in order to improve the strength.
- the inside of the filter frame 140 is divided into two rooms by the partition 141.
- a support column 143 is formed at the same time as the filter frame 140 is formed at the apex portion of the mountain fold having a pleat configuration.
- the electrostatic filter 142 is fixed to the support column 143. Since the electrostatic filter 142 and the support column 143 are integrated, the electrostatic filter 142 is fixed and the pleated shape is maintained.
- the electrostatic filter 142 also includes a non-woven fabric portion of a mixed fiber material of two types of synthetic fibers different from the first embodiment, and a reinforcing net 144 for supporting the non-woven fabric portion.
- This electrostatic filter 142 also captures dust, and when the air permeability deteriorates due to dust accumulation, if it is washed, the electrostatic force is temporarily removed, but after drying, between the different types of synthetic fibers By generating friction, the electrostatic force is recovered, and the dust collection performance can be obtained again.
- the electrostatic filter 142 is configured as L / P ⁇ 3, where L is the length in the pleat depth direction and P is the pitch between the pleat mountains.
- the filter itself is narrow, so that the air permeability especially near the bending apex is impaired. Further, if this value P is also small in appearance, even if the deflection of the filter is small, the deflection becomes conspicuous.
- the reinforcing net 144 is disposed on the exhaust side of the electrostatic filter 142. Accordingly, even if fibers are dropped from the electrostatic filter 142, the fibers can be prevented from being sucked into the projection type image display device 150.
- the support 109 that is integrated with the electrostatic filter 142 in the support column 143 is as small as possible so that the effective area that functions as a filter in the electrostatic filter 142 is not reduced. Is desirable. It goes without saying that it is also effective here to reduce the ineffective area that cannot be used as a filter by providing a recess so that a part of the support pillar 143 escapes from the filter. Further, it is possible to thin out the support pillar 143 as shown in FIG.
- the present invention can be used for production and sales of a dust collection filter unit, a projection-type image display device using the dust collection filter unit, and an air cleaner using the dust collection filter unit.
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- Chemical Kinetics & Catalysis (AREA)
- Physics & Mathematics (AREA)
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Abstract
Description
図1は、本発明の実施の形態1における空気清浄機155の断面図であり、図2は、そのうちの集塵フィルターユニット100の断面図であり、図3は、静電フィルター105を省略したフィルター枠106の斜視図である。筐体101は吸気部102、および排気部103を備えている。筐体101の内部には、外部電源により駆動される軸流ファン104と、その吸気側に配置された集塵フィルターユニット100とを備えている。集塵フィルターユニット100は、静電フィルター105と、その静電フィルター105を取り付ける通気口が形成されたフィルター枠106とを備えている。
式2:B=(L-2×X)/L
式3:C=A×B
図9は、本発明の実施の形態2における投写型画像表示装置150の構造を示す図である。本発明は光学構成に係るものではないので、光学構成については以下に簡単に述べる。
101、125 筐体
102 吸気部
103 排気部
104 軸流ファン
105、142 静電フィルター
106 フィルター枠
107 支持壁
108、144 補強ネット
109 支持部
110、143 支持柱
111 光源
112 反射鏡
113 光学ユニット
114、115 ダイクロイックミラー
116、117、118 全反射ミラー
119R、119G、119B 入射側偏光板
120R、120G、120B 液晶パネル
121R、121G、121B 出射側偏光板
122R、122B ダイクロイック反射膜
124 投写レンズ
126 防塵ガラス
127 電源
128 吸気ファン
129 吸気口
130 プレフィルター
132 吸気ダクト
133 光学ユニットダクト
134 赤用開口
135 排気ファン
138 ランプ用シロッコファン
139 排気口
140 フィルター枠
141 仕切り
150 投写型画像表示装置
155 空気清浄機
161 凹部
Claims (17)
- フィルター材料を折り曲げて構成するプリーツフィルターと、
前記プリーツフィルターが内側に取り付けられる枠体と、
前記枠体の内側に設けられ、前記プリーツフィルターの複数の折り曲げ部を支持して該プリーツフィルターの形状を維持する支持手段とを備えていることを特徴とする集塵フィルターユニット。 - 前記支持手段は、前記枠体に支持され、それぞれが異なる折り曲げ部を支持する複数の支持柱を備えていることを特徴とする請求項1に記載の集塵フィルターユニット。
- 前記プレーツフィルターの折り曲げ部は、前記支持柱に固着されていることを特徴とする請求項2に記載の集塵フィルターユニット。
- 前記プレーツフィルターの折り曲げ部は、前記支持柱に埋設されていることを特徴とする請求項3に記載の集塵フィルターユニット。
- 前記プレーツフィルターの外周部は、前記枠体に埋設されていることを特徴とする請求項1乃至4のいずれか1つに記載の集塵フィルターユニット。
- 前記プレーツフィルターは、前記枠体および前記支持柱を成形する際にインサート成形されることで前記枠体および前記支持柱に埋設されることを特徴とする請求項2乃至4のいずれか1つに記載の集塵フィルターユニット。
- 前記プリーツフィルターは、各折り曲げ部を山又は谷とした場合の山と谷の高低差をL、前記プレーツフィルターの片面側において隣接する折り曲げ部間の折り曲げピッチをPとした場合にL/P≦3の関係を満たすように構成されていることを特徴とする請求項1乃至6のいずれか1つに記載の集塵フィルターユニット。
- 前記プリーツフィルターは、空気が侵入する吸気側に、塵埃を補足するフィルター部、前記フィルター部で埃が除かれた空気が排出される排気側に、前記フィルター部よりも撓みにくい前記フィルター部の補強のための補強ネットが配されていることを特徴とする請求項1乃至7のいずれか1つに記載の集塵フィルターユニット。
- 前記プレーツフィルターは、静電フィルターとして機能する部分が少なくとも2種類の合成繊維の混繊維からなることを特徴とする請求項1乃至8のいずれか1つに記載の集塵フィルターユニット。
- 前記プレーツフィルターの厚みは1mm以上であることを特徴とする請求項1乃至9のいずれか1つに記載の集塵フィルターユニット。
- 前記支持柱は、前記枠体と一体に形成されていることを特徴とする請求項2乃至6のいずれか1つに記載の集塵フィルターユニット。
- 前記複数の支持柱は、前記プレーツフィルターの複数の折り曲げ部の一部に対して設けられていることを特徴とする請求項2乃至6のいずれか1つに記載の集塵フィルターユニット。
- 前記プレーツフィルターの吸気口側の複数の折り曲げ部では、1つおきに前記支持柱が設けられていることを特徴とする請求項12に記載の集塵フィルターユニット。
- 前記複数の支持柱は、前記プレーツフィルターの排気側の折り曲げ部を支持する支持柱の本数が、前記プレーツフィルターの吸気側の折り曲げ部を支持する支持柱の本数以下であることを特徴とする請求項2乃至6のいずれか1つに記載の集塵フィルターユニット。
- 前記支持柱では、前記プレーツフィルターの折り曲げ部を支持する箇所の間に、前記プレーツフィルターを支持しない凹部が形成されていることを特徴とする請求項2乃至4のいずれか1つに記載の集塵フィルターユニット。
- 請求項1乃至15のいずれか1項に記載の集塵フィルターユニットを吸気部に備えたことを特徴とする投影型画像表示装置。
- 請求項1乃至15のいずれか1項に記載の集塵フィルターユニットを吸気部に備えたことを特徴とする空気清浄機。
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JP2012555736A JPWO2012105208A1 (ja) | 2011-01-31 | 2012-01-27 | 集塵フィルターユニット、投写型画像表示装置、及び空気清浄機 |
CN2012800061038A CN103328071A (zh) | 2011-01-31 | 2012-01-27 | 集尘过滤器单元、投影型图像显示装置及空气净化器 |
US13/981,555 US20130298773A1 (en) | 2011-01-31 | 2012-01-27 | Dust collection filter unit, projection image display device, and air cleaner |
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JP2011-017544 | 2011-01-31 | ||
JP2011017544 | 2011-01-31 |
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JP2015222305A (ja) * | 2014-05-22 | 2015-12-10 | カシオ計算機株式会社 | 画像投影装置 |
WO2018079024A1 (ja) * | 2016-10-31 | 2018-05-03 | ソニー株式会社 | 画像投影ユニット及びフィルターボックス |
JP2019098237A (ja) * | 2017-11-30 | 2019-06-24 | 三菱重工業株式会社 | フィルタ装置 |
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US20130298773A1 (en) | 2013-11-14 |
CN103328071A (zh) | 2013-09-25 |
JPWO2012105208A1 (ja) | 2014-07-03 |
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