JP2012035191A - Filter unit panel - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a filter unit panel which is constituted of frame works and an outer frame of each filter unit, both being of a resin member and integrated into one piece by welding, and can hardly give rise to a leakage or a breakage when the filter unit panel is fixed to equipment.SOLUTION: This filter unit panel 1 includes a plurality of filter units 13 and the outer frame 14 surrounding the filter units 13. Each of the filter units 13 is equipped with a filter medium 11 and the frame work 12 for supporting the filter medium 11. In addition, the outer frame 14 and the frame work 12 are both of a resin member, and the filter units 13 are integrated into one piece by welding the adjacent frame works 12. Further, the filter units 13 and the outer frame 14 are integrated into one piece by welding the outer frame 14 and its adjacent frame work 12 together. The outer frame 14 is larger than the adjacent filter unit 13 by thickness.

Description

  The present invention relates to a filter unit panel used in an intake port and / or an exhaust port of a clean room, an air conditioner, a gas turbine, and a steam turbine.

  An air filter is provided in an intake port and / or an exhaust port of a clean room, an air conditioning facility, a gas turbine, a steam turbine, and the like. As an air filter in these applications, a filter unit panel in which a plurality of filter units each having a filter medium and a frame supporting the filter medium are connected so that their outer peripheral surfaces are in contact with each other is suitable. Patent Document 1 discloses an example of a filter unit panel in which filter units having a resin member as a frame are connected.

  The filter unit panel may be further provided with an outer frame that surrounds the four circumferences. The outer frame protects the filter unit, increases the strength of the entire panel, and facilitates the installation of the filter unit. Conventionally, a metal member such as aluminum or a wooden member has been used as the outer frame.

  When the frame of the filter unit is a resin member and a metal member or a wooden member is used for the outer frame, an adhesive is generally used for joining the filter unit and the outer frame. However, when bonding is performed using an adhesive, organic gas derived from the adhesive may be generated from the air filter. Generation of organic gas from the air filter must be prevented especially when the air filter is used in a clean room or the like.

  Therefore, a filter unit panel using a resin as the material of the outer frame as a filter unit panel that suppresses the generation of organic gas while using an outer frame surrounding these units together with a plurality of filter units having a resin member as a frame. Has been proposed (see, for example, Patent Document 2). The outer frame used in the filter unit panel is, for example, an outer frame 101 having a cross section as shown in FIG. 7, and is integrated with the filter unit 102 as shown in FIG. A receding portion 105 is formed on the surface of the outer frame 101 in contact with the filter unit 102 as shown in FIG. On the upper surface and the lower surface of the outer frame 101, convex portions 101 a and 101 b are formed at portions where the filter unit 102 is joined to the frame body 104. On the other hand, the filter unit 102 includes a filter medium 103 and a frame body 104 that supports the four circumferences of the filter medium 103. Convex portions 104 a and 104 b are also formed on the frame body 104 at portions where the outer frame 101 is joined. The outer frame 101 and the filter unit 102 are integrated by welding the convex portion 101a and the convex portion 104a, and the convex portion 101b and the convex portion 104b, respectively, as welding ribs. The melted convex portion 101a and convex portion 104a, and convex portion 101b and convex portion 104b are deformed so as to straddle the upper and lower surfaces of the frame body 104 and the outer frame 101 of the filter unit 102, and are solidified and bonded in this state. 106a and 106b (see FIG. 9).

  Thus, it becomes possible to comprise the whole filter unit panel with the material which can be incinerated by using resin instead of a metal as a material of an outer frame. A filter unit panel made of an incinerator material can be easily disposed of. Furthermore, the filter unit panel in which the frames and the frame and the outer frame are joined by welding can be manufactured more efficiently than a panel that is joined using a locking claw or the like.

JP 2008-119683 A JP 2009-119418 A

  The basic performance required for the outer frame of the filter unit panel includes retention of the filter shape, sealing between the equipment and the filter unit, and fixing to the equipment. A holding metal fitting or the like is used for fixing to the facility.

  For example, the filter unit panel disclosed in Patent Document 2 is fixed to the facility side in the state shown in FIG. Specifically, the lower surface of the outer frame 101 of the filter unit panel is brought into contact with the filter unit panel mounting frame 110 provided on the facility side via the gasket 111, and the holding metal fitting 112 is applied to the upper surface of the outer frame 101. Then, the outer frame 101 of the filter unit panel is fixed to the mounting frame 110 with the pressing bracket 112 by tightening the pressing bracket 112 with respect to the mounting frame 110 using the fastening member 115 including the bolt 113 and the nut 114. The Here, the upper surface and the lower surface of the outer frame 101 are the upper surface on the upstream side of the airflow passing through the filter unit panel, and the lower surface is the surface positioned on the downstream side. It has become.

  In the conventional filter unit panel in which the frame body 104 and the outer frame 101 of the filter unit 102 are formed of a resin material, the thickness (height) of the outer frame 101 is equal to the filter unit 102 (the frame body 104 of the filter unit 102). And the thickness (height) including the welded portion between the outer frame 101 and the outer frame 101). Therefore, as shown in FIG. 10, when the conventional filter unit panel is fixed to the facility, the thickness of the outer frame 101 is smaller than the thickness of the filter unit 102. There was concern. Further, in this case, since the presser fitting 112 comes into contact with the filter unit 102 and / or the welded portion, the total stress for fixing the filter unit panel with the presser fitting 112 is applied to the filter unit 102 and / or the welded portion. As a result, the filter unit 102 and / or the welded portion may be damaged and a leak may occur.

  The present invention has been made in view of the above problems, and the filter unit panel in which the frame body and the outer frame of the filter unit are both resin members, and the frame body and the outer frame are integrated by welding. Therefore, it is an object of the present invention to provide a filter unit panel that is unlikely to leak or break when fixed to equipment.

  The present invention includes a plurality of filter units and an outer frame that surrounds the plurality of filter units, and each of the plurality of filter units includes a filter medium and a frame that supports the filter medium, Both the frame and the frame are resin members, and the plurality of filter units are integrated by welding adjacent frames, and the plurality of filter units and the outer frame are adjacent to the outer frame and the outer frame. Provided is a filter unit panel which is integrated by welding with a frame body, and has a thickness of the outer frame larger than that of an adjacent filter unit.

  In addition, the thickness of the outer frame in the filter unit panel of the present invention refers to the thickness of the outer frame excluding the welded portion used for welding to the frame. The thickness of the filter unit is the thickness of the filter unit including the welded portion between the filter unit frame and the outer frame.

  In the filter unit panel of the present invention, the thickness of the outer frame is larger than the thickness of the adjacent filter unit. Therefore, the leak in the state fixed to the equipment can be suppressed. Moreover, since the outer frame is thicker than the filter unit, when the filter unit panel of the present invention is fixed to the facility by the fixing member, the outer frame is in contact with the fixing member. Accordingly, since the total stress for fixing the filter unit panel is not applied to the filter unit and / or the welded portion, the filter unit and the welded portion can be prevented from being damaged.

It is a top view of the filter unit panel in an embodiment of the invention. It is a cross-sectional view which shows an example of the outer frame of the filter unit panel in embodiment of this invention. It is sectional drawing which shows the state which made the outer frame of FIG. 2 contact | abut to the filter unit. It is sectional drawing which shows the state which welded the outer frame and filter unit of FIG. It is a perspective view showing an example of the state where the filter unit panel of the present invention was fixed to equipment. In the state shown in FIG. 5, it is a figure including the partial cross section which shows the state by which the filter unit panel was fixed to the installation by the fixing member. It is a cross-sectional view showing an example of a conventional outer frame. It is sectional drawing which shows the state which made the filter unit contact | abut on the outer frame of FIG. It is sectional drawing which shows the state which welded the outer frame and filter unit of FIG. It is a figure including the partial cross section which shows the state by which the conventional filter unit panel was fixed to the installation by the fixing member.

  Embodiments of a filter unit panel according to the present invention will be described below with reference to the drawings. The following description does not limit the present invention.

  FIG. 1 is a plan view of a filter unit panel 1 according to an embodiment of the present invention. As shown in FIG. 1, the filter unit panel 1 of the present embodiment includes a plurality (six in this embodiment) of filter units 13 and an outer frame 14 that surrounds the plurality of filter units 13. Each of the plurality of filter units 13 includes a filter medium 11 and a frame body 12 that supports the filter medium 11. The filter medium 11 is pleated (folded) to increase the filtration area. The filter medium 11 is rectangular in a plan view (refers to a state viewed along the airflow passing through the filter medium), and the frame body 12 has a frame shape in which the inner circumference and the outer circumference each draw a rectangle in the plan view. And the filter medium 11 is supported by the inner peripheral surface.

  The frame body 12 is a resin member, and the plurality of filter units 13 are integrated by welding the frame bodies 12 adjacent to each other. As the frame body 12, an injection-molded resin member is suitable so as to fix the peripheral edge portion of the filter medium 11, more specifically, to embed and fix the peripheral edge portion. In the injection molding, the formation of the frame body 12 and the fixing of the filter medium 11 are simultaneously performed to simplify the manufacturing process. According to injection molding, defects such as warping and sinking tend to occur in the resin member. For this reason, if the air filter is installed in a state where the resin member by injection molding is arranged at the outermost position, the sealing of the air filter may be incomplete. However, this defect of the frame 12 by injection molding can be prevented from being exposed by providing the outer frame 14.

  On the outer peripheral surface of the frame body 12, a fitting portion (fitting portion in FIGS. 3 and 4) extending in the circumferential direction of the frame body 12 and having convex portions (peak portions) and concave portions (valley portions) arranged alternately. 12c) may be formed. Such a fitting portion is fitted to the fitting portion of the adjacent filter unit 13 when the plurality of filter units 13 are integrated. Therefore, by providing such a fitting part, the leak in the welding part of filter units 13 can be suppressed. In addition, the fitting part does not need to be provided in the outer peripheral surface of the frame 12.

  The surface of the frame body 12 that is positioned upstream of the air flow passing through the filter medium 11 relative to the filter medium 11 and faces the upstream side of the air flow is positioned on the upper surface, and is positioned downstream of the air flow than the filter medium 11. When the surface of the frame body 12 facing the downstream side of the frame body 12 is a lower surface, convex portions are formed on the upper surface and the lower surface of the frame body 12, and the convex portions have wall surfaces extending from the outer peripheral surface of the frame body 12 ( (Refer to the convex parts 12a and 12b of the frame 12 shown in FIG. 3). This convex part functions as a welding rib when integrating a plurality of filter units and further integrating with the outer frame 14.

  The outer frame 14 protects the filter unit 13, increases the strength of the entire panel, and facilitates the installation of the filter unit panel 1. The outer frame 14 is a resin member and is integrated with the frame body 12 of the adjacent filter unit 13 by welding. The outer frame 14 may be configured by integrating four rod-shaped bodies. FIG. 2 shows a cross section of an example of the outer frame 14. A hollow section 15 that contributes to weight reduction of the panel appears in the cross section of the outer frame 14.

  A receding portion 16 is formed on the inner peripheral surface of the outer frame 14 (the surface in contact with the filter unit). The receding portion 16 is formed so as not to contact the fitting portion provided on the outer peripheral surface of the frame 12 of the filter unit 13 (see FIGS. 3 and 4). The outer frame 14 is in contact with the filter unit 13 at the upper part and the lower part of the receding part 16. Since the retracting portion 16 is formed to accommodate the fitting portion, when the fitting portion is not provided on the frame body 12, it is not necessary to provide the retracting portion 16 on the outer frame 14. The outer frame 14 may be formed with a fitting portion that fits with the fitting portion of the unit instead of the retracting portion 16, whereby the rigidity of the panel is further improved. However, in this case, it is necessary to prepare a fitting portion corresponding to the fitting portion appearing on the outermost surface of the filter unit 13 where the outer frame 14 is to be arranged, and a plurality of types of outer frames must be prepared. Sometimes. On the other hand, the use of the retreating portion 16 eliminates the need for the above-described complicated manufacturing.

  A convex portion 18a and a convex portion 18b are formed on the upper surface 17a and the lower surface 17b of the outer frame 14, respectively. The convex portions 18 a and 18 b have wall surfaces obtained by extending the inner peripheral surface of the outer frame 14. As shown in FIG. 3, the convex portions 18 a and the convex portions 18 b are in contact with the convex portions 12 a and the convex portions 12 b formed on the frame body 12 of the filter unit 13 in a state where the outer frame 14 is in contact with the filter unit 13. It is formed as follows. Here, the surface of the outer frame 14 that is positioned upstream of the airflow passing through the filter medium 11 relative to the filter medium 11 and faces the upstream side of the airflow is the upper surface 17a, and the downstream side of the airflow from the filter medium 11 The surface of the outer frame 14 that is located at and faces the downstream side of the airflow is defined as a lower surface 17b.

  The outer frame 14 and the filter unit 13 are integrated by welding the convex portions 18a and 18b and the convex portions 12a and 12b as welding ribs. As shown in FIG. 4, the melted convex portions 18 a and the convex portions 12 a are deformed so as to straddle the upper surface of the outer frame 14 and the frame body 12, and become the bonding resin 19 a in this state. Moreover, the melt | dissolved convex part 18b and the convex part 12b deform | transform so that the outer frame 14 and the lower surface of the frame 12 may be straddled, and it becomes the joining resin 19b in this state. The shape of the protrusions 18a and 18b is not particularly limited, but is preferably tapered. By forming the taper shape, it is possible to prevent the resin of the convex portions 18a and 18b melted at the time of welding from flowing into and collecting in the groove portions adjacent to the convex portions 18a and 18b. It becomes easy to make the state straddling the frame 12.

  The outer frame 14 is formed so that the thickness thereof is larger than the thickness of the filter unit 13 in a state where the outer frame 14 is integrated with the filter unit 13. For example, the position of the upper surface 17a of the outer frame 14 is the position of the upper surface of the frame body 12 and the welded portion (the portion of the outer frame 14 and the upper surface of the frame body 12 used for welding the outer frame 14 and the frame body 12). In this embodiment, it corresponds to the portion of the bonding resin 19a.) Is located upstream of the air flow, and the position of the lower surface 17b of the outer frame 14 is the position of the lower surface of the frame body 12 and the welded portion. (Of the lower surface of the outer frame 14 and the frame body 12, the portion used for welding the outer frame 14 and the frame body 12, which corresponds to the bonding resin 19 b portion in the present embodiment). The outer frame 14 may be formed so as to be located on the downstream side of the airflow. However, the position of the upper surface 17a of the outer frame 14 is the position on the most upstream side of the airflow in the region of the upper surface 17a of the outer frame 14 excluding the welded portion used for welding to the frame body 12. . The position of the lower surface 17b of the outer frame 14 is a position on the most downstream side of the airflow in a region of the lower surface 17b of the outer frame 14 excluding a welding portion used for welding with the frame body 12. Further, the position of the upper surface of the frame body 12 is a position on the most upstream side of the airflow in the upper surface of the frame body 12. The position of the lower surface of the frame body 12 is the position on the most downstream side of the airflow in the lower surface of the frame body 12. The position of the welded portion (bonding resin 19a) is the position on the most upstream side of the airflow in the welded portion. The position of the welded portion (bonding resin 19b) is the position on the most downstream side of the airflow in the welded portion.

  The outer frame 14 is not limited to the shape shown in FIG. 2, as long as the outer frame 14 has a shape in which the thickness is larger than the thickness of the filter unit 13 in a state of being integrated with the filter unit 13. Each of the plurality of rod-like bodies constituting the outer frame 14 is preferably a resin member obtained by extrusion molding, particularly a resin member extruded so that a hollow portion and / or a receding portion is formed in the cross section.

  Examples of the resin constituting the frame 12 and the outer frame 14 include polyolefin resins, polyamide resins (including aromatic polyamide resins), polyurethane resins, polyester resins, polystyrene resins (ABS resins, etc.), Polycarbonate resin is mentioned. Two or more kinds of these resins may be mixed and used, or different types of resins may be used for the frame 12 and the outer frame 14. You may add fillers, such as glass fiber and carbon fiber, a pigment, an antibacterial agent, etc. to resin.

  As the filter medium 11, a known filter medium and a filter medium having a dustproof performance equivalent to or higher than that can be used. As the filter medium 11, a melt blown nonwoven fabric, an electret filter, a polytetrafluoroethylene (PTFE) porous film, or the like can be used. It is desirable to use a porous PTFE membrane because it is a clean material that does not generate dust and has high dust collection performance. A preferable filter medium 11 includes a laminate of a PTFE porous membrane and a breathable fiber layer. The breathable fiber layer may be composed of, for example, a polymer fiber material. Although glass fiber is also known as a material for the filter medium 11, incineration disposal becomes difficult when glass fiber is used as the filter medium.

  The PTFE porous membrane can be manufactured, for example, as follows.

  First, a paste-like mixture obtained by adding a liquid lubricant to PTFE fine powder is preformed. The liquid lubricant is not particularly limited as long as it can wet the surface of the PTFE fine powder and can be removed by extraction or overheating. For example, liquid paraffin, naphtha, white oil and the like can be used. The liquid addition amount is suitably about 5 to 50 parts by weight with respect to 100 parts by weight of PTFE fine powder. The preforming is performed at a pressure at which the liquid lubricant cannot be squeezed out.

  Next, the preform is formed into a sheet by paste extrusion or rolling, and this PTFE sheet is stretched at least in a uniaxial direction to obtain a PTFE porous membrane. The PTFE sheet body is preferably stretched after removing the liquid lubricant. The draw ratio is not particularly defined, and may be appropriately set according to pressure loss and collection efficiency. In consideration of stretching unevenness and broken talk during stretching, an area stretching ratio of 50 to 900 times is preferable.

  The average pore meter for the PTFE porous membrane is preferably from 0.01 to 5 μm, and the average fiber diameter is preferably from 0.01 to 0.3 μm. The pressure loss when air is permeated at a flow rate of 5.3 cm / sec is preferably 10 to 295 Pa.

  The breathable fiber material has a function as a reinforcing material. Furthermore, it itself has a dust collecting performance and may act as a prefilter medium. As the breathable fiber material, those having higher strength and higher breathability than the PTFE porous membrane are suitable, and the material and form thereof are not particularly limited. Examples of the material include felt, nonwoven fabric, woven fabric, and mesh. Nonwoven fabrics are preferred from the viewpoints of strength, trapping properties, and flexibility, and polyolefins, polyesters, polyamides, and composite materials thereof can be used.

  By laminating the PTFE porous membrane and the breathable fiber material, a filter medium comprising a laminate of the PTFE porous membrane and the breathable fiber layer can be obtained, but the lamination method is not particularly limited. These may be simply overlapped, or may be stacked by a method such as adhesive lamination or heat lamination.

  The filter medium constituting the filter unit is preferably pleated to increase the ventilation area and the collection area.

  The thickness of the filter medium 11 is not particularly limited, but is preferably 0.05 to 1 mm because it needs to be thick enough to retain the shape when pleated. The pressure loss of the filter medium is preferably 20 to 300 Pa and more preferably 50 to 200 Pa when the linear velocity is 5.3 cm / sec. The collection efficiency of particles of 0.3 to 0.5 μm is preferably 99% or more and more preferably 99.97% or more when the linear velocity is 5.3 cm / sec.

  Next, fixing of the filter unit panel 1 of the present embodiment to equipment will be described.

  FIG. 5 is a perspective view showing an example of a state in which the filter unit panel 1 is fixed to the facility. FIG. 6 is a view including a partial cross section showing in detail a state in which the filter unit panel 1 is fixed by a fixing member. The lower surface 17b of the outer frame 14 of the filter unit panel 1 is brought into contact with the filter unit panel mounting frame 51 provided on the equipment side via the gasket 52, and the pressing metal 53 is applied to the upper surface 17a of the outer frame 14, The outer frame 14 of the filter unit panel 1 is fixed to the mounting frame 51 with the pressing metal 53 by tightening the pressing metal 53 with respect to the mounting frame 51 using the fastening member 56 composed of the bolt 54 and the nut 55. . In this way, the filter unit panel 1 is fixed to the facility side. The outer frame 14 of the filter unit panel 1 is formed so that the thickness thereof is larger than the thickness of the filter unit 13 in a state where the outer frame 14 is integrated with the filter unit 13, and the position of the upper surface 17a of the outer frame 14 is The position of the upper surface of the frame body 12 and the position of the welded portion is located upstream of the airflow, and the position of the lower surface 17b of the outer frame 14 is greater than the position of the lower surface of the frame body 12 and the position of the welded portion. Located on the downstream side. Therefore, when the filter unit panel 1 is fixed to the facility, the presser fitting 53 and the gasket 52 and the upper surface 17a and the lower surface 17b of the outer frame 14 are in close contact with each other, so that leakage due to insufficient sealing can be suppressed. Further, in this case, since the pressing metal 53 comes into contact with the upper surface 17 a of the outer frame 14 of the filter unit 1, the stress for fixing the filter unit panel 1 with the pressing metal 53 is applied to the upper surface 17 a of the outer frame 14. It will be. Thereby, it becomes difficult to produce the damage of the filter unit 13 or the welding part, and the leak resulting from these damages is suppressed.

  Next, the filter unit panel of the present invention will be specifically described using examples. In addition, this invention is not limited at all by the Example shown below.

Example 1
A filter unit panel having the same configuration as the filter unit panel 1 shown in FIG.

  As a filter medium, a laminate of a PTFE porous membrane and a breathable fiber layer ("NTF9514-H21" manufactured by Nitto Denko Corporation) is pleated so that the peak height is 22 mm and the number of peaks is 93. Using. This filter medium was set in a mold of an injection molding machine, and ABS resin was injection molded to form a frame. Thus, a filter unit having an outer shape of 195 mm × 295 mm was obtained. Next, the six filter units were integrated by heat welding with fitting portions formed on the outer peripheral surface being fitted to each other and fixing the convex portions formed on the upper and lower surfaces of the frame body as welding ribs. The height (thickness) of the filter unit after being integrated by heat welding was 26 mm.

  As an outer frame, a member having the same shape as in FIG. 2 was produced by profile extrusion. As a material, “Cebian VGR10” manufactured by Daicel Polymer Co., Ltd. made of ABS resin and glass fiber was used. The height (thickness) of this outer frame (height (thickness) of the portion excluding the convex portions used as welding ribs) was 27 mm, which was larger than the height (thickness) of the filter unit.

  The outer frame and the frame of the filter unit were integrated with each other by heat welding using convex portions formed on the upper surface and the lower surface of the outer frame and the frame as welding ribs to obtain a filter unit panel having an outer shape of 610 mm × 610 mm. In the obtained filter unit panel, the position of the upper surface of the outer frame is located upstream of the position of the upper surface of the frame body and the position of the welded portion, and the position of the lower surface of the outer frame is the position of the lower surface of the frame body. The outer frame and the frame of the filter unit were integrated so as to be positioned downstream of the position and the position of the welded portion of the airflow.

  The filter unit panel produced as described above was subjected to a strength test and a leak test by the following methods. The results are shown in Table 1.

<Strength test>
The filter unit panel was placed on the small vice so that the coupling portion between the filter unit and the outer frame was placed at the center of the clamp surface of the small vise (ERON, “No. 200”). The size of the clamp surface was 100 mm × 73 mm. Using a torque wrench “KANON (N900LCK)” manufactured by Nakamura Seisakusho Co., Ltd., the vise was tightened after the torque was set, and the breakage of the joint between the outer frame and the filter unit was confirmed.

<Leak test>
The filter unit panel was installed on the downstream side of the duct, and the air volume was set using an anemometer so that the surface wind speed was 0.5 m / sec. The presence or absence of leakage was confirmed using a particle counter conforming to JIS B 9921 and test particles having a particle size larger than 0.5 μm. The intake amount of the particle counter was 28.3 L / min. Further, the probe provided on the particle counter had a suction area of 30 mm × 50 mm. By generating a PAO (polyalphaolefin) particles as the test particle concentration of the filter unit panel upstream side at 1 × 10 ⁷ cells / min, with installed probe to the filter unit panel downstream 1 × 10 ³ or more / When min test particles were detected, it was judged that there was a leak.

(Comparative Example 1)
A filter unit panel was produced in the same manner as in Example 1 except that the shape of the outer frame was changed to the shape shown in FIG. In addition, the height (thickness) of the outer frame was 23 mm, which was smaller than the height (thickness) of the filter unit. Therefore, in the filter unit panel of Comparative Example 1, the position of the upper surface of the outer frame is located downstream of the position of the upper surface of the frame body and the position of the welded portion, and the position of the lower surface of the outer frame is the frame body. It was located on the upstream side of the airflow with respect to the position of the lower surface and the position of the welded portion.

  The filter unit panel of Comparative Example 1 was also subjected to a strength test and a leak test in the same manner as in Example 1. The results are shown in Table 1.

  From the above results, the filter unit panel of Example 1 satisfying the configuration of the present invention in which the height (thickness) of the outer frame is set to be larger than the height (thickness) of the filter unit is the same as that of Comparative Example 1. Compared to the filter unit panel, it was confirmed that leaks and breakage were less likely to occur when fixed to equipment.

  The filter unit panel according to the present invention can suppress leakage in a state where it is fixed to the equipment, and is not easily damaged when fixed to the equipment. it can.

DESCRIPTION OF SYMBOLS 1 Filter unit panel 11 Filter medium 12 Frame body 12a, 12b Projection part of frame body 12c Fitting part of frame body 13 Filter unit 14 Outer frame 15 Hollow part 16 Retraction part 17a Upper surface of outer frame 17b Lower surface of outer frame 18a, 18b Convex portion 19a, 19b of outer frame 51 Bonding resin 51 Filter unit panel mounting frame 52 Gasket 53 Holding bracket 54 Bolt 55 Nut 56 Fastening member

Claims (4)

A plurality of filter units, and an outer frame surrounding the plurality of filter units,
Each of the plurality of filter units includes a filter medium and a frame that supports the filter medium,
Both the outer frame and the frame are resin members,
The plurality of filter units are integrated by welding adjacent frames,
The plurality of filter units and the outer frame are integrated by welding the outer frame and a frame adjacent to the outer frame,
The thickness of the outer frame is greater than the thickness of the adjacent filter unit;
Filter unit panel.   The filter unit panel according to claim 1, wherein the outer frame is configured by a plurality of rod-like bodies integrated by welding.   3. The filter unit panel according to claim 2, wherein each of the plurality of rod-shaped bodies is a resin member that is extruded so that a hollow portion and / or a receding portion is formed in a cross section. The outer frame facing the upstream side of the airflow and the surface of the frame body located on the upstream side of the airflow passing through the filter medium from the filter medium, and the downstream side of the airflow positioned above the filter medium. When the outer frame facing the downstream side of the airflow and the surface of the frame body are the lower surface,
The position of the upper surface of the outer frame is located upstream of the position of the upper surface of the frame body, and the welded portion between the outer frame and the frame body on the outer frame and the upper surface of the frame body Located on the upstream side of the airflow from the position of
The position of the lower surface of the outer frame is located downstream of the position of the lower surface of the frame body, and the welded portion between the outer frame and the frame body on the outer frame and the lower surface of the frame body Located on the downstream side of the airflow from the position of
The filter unit panel of any one of Claims 1-3.
However, the position of the upper surface of the outer frame is the position of the uppermost side of the airflow in the region of the upper surface of the outer frame excluding the welded portion used for welding with the frame, The position of the lower surface of the outer frame is the position on the most downstream side of the airflow in the region of the lower surface of the outer frame excluding the welded portion used for welding with the frame. Further, the position of the upper surface of the frame body is a position on the most upstream side of the airflow among the upper surfaces of the frame body, and the position of the lower surface of the frame body is the position of the lower surface of the frame body. It is the most downstream position of the airflow. Further, the position of the welded portion between the outer frame and the frame body on the upper surface of the outer frame and the frame body is a position on the most upstream side of the airflow in the welded portion, and the outer frame and The position of the welded portion between the outer frame and the frame body on the lower surface of the frame body is the position on the most downstream side of the airflow in the welded portion.

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