JP2016111915A - Filter attachment structure and housing panel - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prolong the life for a filter provided in a housing panel of a wind cooling structure and improve the reliability of the housing panel.SOLUTION: There is provided an attachment structure for a filter 1 provided in a vent port 3a formed in a housing panel 2. The filter 1 is sandwiched between a pair of pressing plates 6, 7 such that end portions of the filter 1 protrude out from end portions of the pressing plates 6, 7, to form a filter structural body 5. The filter structural body 5 is provided in a filter retaining frame 3b formed in a door 3, with the interposition of a spacer 8. In the attachment structure for a filter 1, the following relationships are satisfied: external dimensions of the filter 1>internal dimensions of inner peripheral portion of the filter retaining frame 3b>external dimensions of the pressing plates 6, 7.SELECTED DRAWING: Figure 2

Description

  The present invention relates to a filter mounting structure attached to a storage board and a storage board.

  Many storage panels for storing devices such as switchboards and power converters have an air cooling structure for cooling internal components and the like.

  A storage panel having an air cooling structure has, for example, a ventilation fan on the ceiling of the storage panel, and a vent on a door provided on the front surface of the storage panel or a sheet metal provided as a housing of the storage panel. This vent is provided with a filter (air filter) (for example, Patent Documents 1 and 2). The storage panel introduces cooling air into the storage panel from the vent and discharges the cooling air from the ceiling to cool the internal components while preventing foreign matter from entering the storage panel.

  The filter needs to be periodically replaced with a new filter. In view of this, a technique has been proposed that allows the filter replacement operation to be performed with the door of the storage board closed (for example, Patent Document 3).

JP-A 61-225896 Japanese Utility Model Publication No. 4-47314 JP 2012-44779 A

  However, when the filter is held on the filter holding frame, a gap is generated between the filter holding frame and the filter, and cooling air may be introduced into the storage panel from this gap. In other words, the cooling air that does not pass through the filter is introduced into the storage panel, which may cause an accident in the storage panel and cause deterioration of components in the storage panel.

  Further, when the filter moves in the filter holding frame according to the flow of the cooling air, the filter may come into contact with the filter holding frame. When the filter comes into contact with the filter cover or the filter holding frame, the contact area between the filter and the cooling air is reduced, which may shorten the life of the filter.

  In view of the above circumstances, an object of the present invention is to provide a technique that contributes to extending the life of a filter and improving the reliability of a storage board.

  One aspect of the filter mounting structure of the present invention that achieves the above object is a filter mounting structure provided in a vent hole formed in the storage board, and is formed in the storage board so as to surround the vent hole. A filter holding frame that holds the filter, and a spacer that separates the filter from the opening on the vent hole side of the filter holding frame, and a pair of frames, and from the end of the frame A filter structure is formed by sandwiching the filter so that the end of the filter protrudes, and the depth of the filter holding frame is formed deeper than the thickness of the filter structure and the spacer. The filter holding frame has the filter structure such that the end of the filter protruding from the end of the frame closes the space between the inner periphery of the filter holding frame and the end of the filter structure. Set up body It is characterized in Rukoto.

  Another aspect of the filter mounting structure of the present invention that achieves the above object is a filter mounting structure provided in a vent hole formed in the door of the storage board, wherein the air sucked into the storage board is Having an opening hole to pass through, and when the door is closed, having an insulating barrier provided facing the inner surface of the door, and an opening hole through which air sucked into the storage board passes, A front cover provided at an opening end of the ventilation hole outside the door, an opening through which air sucked into the storage board passes, a receiving metal provided in the ventilation hole, and the filter are fixed. A filter fixing frame, and a seal member provided on a surface of the support member facing the insulation barrier, or a surface of the insulation barrier facing the support member, and a dimension in the depth direction of the support member is The filter is fixed When the door is closed, the seal member is sandwiched between the insulating barrier and the receiving metal fitting, and the filter fixing frame to which the filter is fixed is the receiving metal fitting. Further, the front cover is provided so as to be detachable from the outside of the storage board and spaced from the filter fixed to the metal fitting through the filter fixing frame.

  In addition, the storage board of the present invention that achieves the above object is characterized by having the filter mounting structure.

  According to the above invention, the lifetime of the filter is extended and the reliability of the storage board is improved.

It is a principal part expansion perspective view of the storage board which concerns on 1st Embodiment of this invention. It is a disassembled perspective view of the filter part of the storage board which concerns on 1st Embodiment of this invention. It is a disassembled perspective view of a filter structure. (A) The front view of a filter structure, (b) The enlarged view of the corner | angular part of a filter structure. (A) The front view of the door provided with the filter, (b) It is AA sectional drawing of Fig.5 (a). It is a principal part expansion perspective view of the storage board which concerns on 2nd Embodiment of this invention. It is a disassembled perspective view of the filter part of the storage board which concerns on 2nd Embodiment of this invention. It is a cross-sectional view of the door portion of the storage board according to the second embodiment of the present invention. FIG. 6 is a perspective view of a filter assembly. (A) It is explanatory drawing explaining the procedure which provides a filter in a filter fixing frame, (b) It is explanatory drawing explaining the procedure which fixes a filter to a filter fixing frame. It is explanatory drawing explaining the procedure which fixes a filter assembly to the door of a storage board. It is a disassembled perspective view of the filter structure which concerns on other embodiment of this invention.

  A filter mounting structure and a storage board according to an embodiment of the present invention will be described in detail with reference to the drawings.

[First Embodiment]
FIG. 1 is an enlarged view of a main part of a storage board 2 to which a filter 1 according to a first embodiment of the present invention is attached. In the embodiment, the filter 1 is provided on the door 3 of the storage board 2 in which the power conversion device is stored. In FIG. 1, the filter 1 is covered with a filter cover 4. Moreover, although not shown in figure, the ceiling part of the storage board 2 is provided with the exhaust port from which cooling air is discharged, and the ventilation fan.

  As shown in FIG. 2, the door 3 is formed with a filter holding frame 3b for holding a filter structure 5 (filter assembly) to be described in detail later.

  The filter holding frame 3b is, for example, a recess formed in the door 3 so as to be recessed toward the inside of the storage board 2 (indicated by an arrow in the figure). That is, the filter holding frame 3b is formed by the wall surface of the recess. A plurality of slit-shaped vents 3a are formed on the flat surface of the recess (the surface in the depth direction, hereinafter referred to as the depth surface of the filter holding frame 3b). That is, the filter holding frame 3b is formed on the door 3 so as to surround the vent hole 3a. Accordingly, the filter holding frame 3b has an opening (hereinafter referred to as an external opening) on the outside of the storage panel 2 of the door 3, and an opening (hereinafter referred to as an internal) communicating with the vent 3a on the inside of the storage panel 2 of the door 3. Side opening). The cooling air is introduced into the storage board 2 through the filter holding frame 3b and the vent 3a. When the depth of the filter holding frame 3b (that is, the thickness of the filter holding frame 3b in the thickness direction of the door 3) is formed larger than the thickness of the filter structure 5, the filter structure 5 held by the filter holding frame 3b. However, it does not protrude from the front surface of the door 3 and is preferable.

  The filter cover 4 can pass cooling air and protects the filter 1. For example, the filter cover 4 is a cover having a structure in which flat plates are juxtaposed to form a slit (so-called armor door structure). The filter cover 4 is provided in consideration of safety protection of the filter 1 and the storage board 2, and prevents a finger or the like from entering the storage board 2.

  As shown in FIG. 3, the filter structure 5 is configured by holding the filter 1 between a pair of pressing plates 6 and 7. The holding plates 6 and 7 are frame bodies in which openings 6a and 7a through which cooling air can pass are formed.

  The holding plates 6 and 7 have an outer shape smaller than the outer shape of the filter 1. Therefore, as shown in FIGS. 4A and 4B, the filter 1 is held between the holding plates 6 and 7 so that the end of the filter 1 protrudes from the end of the holding plates 6 and 7. It becomes.

  That is, as shown in FIG. 4B, “the outer dimension in the vertical direction of the filter 1”> “the outer dimension in the vertical direction of the pressing plates 6 and 7” and “the outer dimension in the horizontal direction of the filter 1”> “ The outer dimension of the filter 1 is formed to be slightly larger than the outer dimension of the pressing plates 6, 7. The filter 1 protrudes in both the vertical direction and the horizontal direction.

  As shown in FIG. 5A, the filter structure 5 is fixed to the filter holding frame 3 b of the door 3 and covered with the filter cover 4. In FIG. 5A, the filter structure 5 is hidden by the filter cover 4.

  As shown in FIG. 5B, the filter structure 5 is screwed to the back surface of the filter holding frame 3 b via a spacer 8. Specifically, the screw 9 passes through the filter structure 5 and the spacer 8 and is screwed to the inner surface of the filter holding frame 3b. In the filter structure 5 shown in FIG. 5B, the spacer 10 is provided between the pressing plate 6 and the pressing plate 7, but the interval between the pressing plate 6 and the pressing plate 7 is the same as that of the filter 1. The spacer 10 is not necessarily required because it can be defined by the thickness. In the description of the embodiment, the spacers 8 are provided at the four corners of the filter structure 5. However, the arrangement of the spacers 8 is not limited to the four corners. Spacers 8 are disposed where necessary so that a gap can be formed between the structure 5 and the structure 5.

  When the filter structure 5 is screwed to the door 3, the filter structure 5 is inserted into the filter holding frame 3 b and the filter structure 5 in contact with the spacer 8 is fixed by the screw 9. Further, a filter cover 4 is provided on the door 3 so as to cover the opening on the outside of the filter holding frame 3b.

  When the filter structure 5 is inserted into the filter holding frame 3b, the end of the filter 1 protruding from the end of the filter structure 5 is deformed, and the end of the holding plate 6 (that is, the end of the filter structure 5). ) And the inner peripheral portion of the filter holding frame 3b. That is, “the outer dimension in the vertical direction of the filter 1”> “the inner dimension in the vertical direction of the inner periphery of the filter holding frame 3b”> “the outer dimension in the vertical direction of the holding plates 6 and 7” Direction outer dimension >> "lateral dimension of filter holding frame 3b inner peripheral part"> "lateral dimension of presser plates 6, 7", so that the end of filter structure 5 and the filter A gap with the inner periphery of the holding frame 3b can be filled with the filter 1. In FIG. 5B, the gap between the lower end portion of the filter structure 5 and the inner peripheral surface of the filter holding frame 3b is filled with the filter 1, but at each end of the filter structure 5, the filter structure A gap between the end of the body 5 and the inner peripheral part of the filter holding frame 3b is filled by deformation of the filter 1.

  Further, “thickness (L) in the depth direction of the filter holding frame 3b”> “thickness of the filter structure 5 + thickness of the spacer 8” makes it possible to place the filter structure 5 in the filter holding frame 3b. When screwed, a gap is formed between the filter 1 and the filter cover 4.

  According to the filter 1 mounting structure and the storage board 2 according to the first embodiment of the present invention having the above-described configuration, the filter structure 5 is provided on the filter holding frame 3b via the spacer 8, whereby the filter 1 and the door 3 are provided. The filter 1 can be fixed to the filter holding frame 3b so that a gap is formed between the main body. As a result, the contact between the filter 1 and the door 3 is prevented by the flow or vibration of the cooling air, and the performance of the filter 1 can be utilized, and the life of the filter 1 is prevented from being shortened.

  Further, by satisfying “thickness (L) in the depth direction of the filter holding frame 3b”> “thickness of the filter structure 5 + thickness of the spacer 8”, a gap is formed between the filter 1 and the filter cover 4. The filter 1 is fixed to the filter holding frame 3b so that it can do. As a result, the contact between the filter 1 and the filter cover 4 is prevented by vibration or the like, and the performance of the filter 1 can be utilized, and the life of the filter 1 is prevented from being shortened. Furthermore, since the filter structure 5 is housed in the filter holding frame 3b, the unevenness between the surface of the door 3 and the filter cover 4 is reduced, and the aesthetic appearance is not impaired.

  Further, when the filter structure 5 is inserted into the filter holding frame 3b, the filter 1 protruding from the end of the filter structure 5 is between the end of the filter structure 5 and the inner peripheral surface of the filter holding frame 3b. Deforms to close. That is, the gap between the filter structure 5 and the inner peripheral surface of the filter holding frame 3b is closed by the filter 1 protruding from the end portions of the pressing plates 6 and 7. As a result, most of the cooling air passes through the filter 1 and flows into the storage panel 2, which improves the dust collecting ability of the filter 1 and causes foreign matter to enter the storage panel 2. Accidents in the storage board 2 and deterioration of parts can be prevented.

  The storage panel 2 can be applied to a storage panel having an air cooling structure such as a power distribution panel or a power converter. According to the storage panel 2, the filter 1 can have a long life, and not only the reliability of the storage panel 2 is improved, but the filter 1 can be replaced without opening and closing the door 3 of the storage panel 2. .

[Second Embodiment]
The principal part enlarged view of the storage panel 13 to which the filter 12 which concerns on 2nd Embodiment of this invention is attached is shown in FIG. As shown in FIG. 6, the filter 12 is provided on the door 14 of the storage board 13 to prevent foreign matter from being mixed into the storage board 13. In FIG. 6, the filter 12 is covered with the front cover 15 and is not shown.

  The storage board 13 is the same as the storage board 2 of the first embodiment, and is a board for storing, for example, a distribution board or a power converter.

  As shown in FIG. 7, the door 14 is formed with an intake hole 14a through which cooling air passes. A receiving bracket 16 is provided in the intake hole 14 a of the door 14, and a filter assembly 17 is provided in the receiving bracket 16. The door 14 is formed with a female screw portion 14b for screwing the front cover 15.

  The front cover 15 is provided so as to cover an opening outside the door 14 of an intake hole 14 a formed in the door 14. The front cover 15 is formed with a screw through hole 15a for fixing the front cover 15, and the front cover 15 is fixed to the door 14 by attaching a screw passing through the screw through hole 15a to the female screw portion 14b. Is done. The front cover 15 is formed with a large number of ventilation opening holes 15b (for example, long hole-shaped opening holes). The opening hole 15b is formed in a size that does not allow a human finger to enter.

  The receiving metal fitting 16 is a frame body to which the filter assembly 17 is fixed. As shown in FIG. 8, the dimension L in the depth direction of the metal fitting 16 is formed longer than the dimension D in the depth direction of the filter assembly 17. That is, when the front cover 15 is provided so as to cover the opening of the intake hole 14 a outside the door 14 after the filter assembly 17 is fixed to the receiving bracket 16, the receiving bracket 16 is interposed between the filter assembly 17 and the front cover 15. And a gap of the dimension difference (LD) in the depth direction of the filter assembly 17 is generated. The receiving metal fitting 16 is attached to the door 14 by welding or the like. For example, the receiving metal fitting 16 is welded to the door 14 by a welding portion 18 provided at the opening end of the intake hole 14a outside the door 14. As shown in FIG. 7, a female screw portion 16 a for screwing the filter assembly 17 is formed in the receiving metal fitting 16. Further, a packing (seal member) 19 is provided on the inner side of the storage board 13 of the metal fitting 16.

  The packing 19 is a surface on the inner side of the storage board 13 of the receiving metal 16 and is provided so as to surround the opening 16 b formed in the receiving metal 16. When the door 14 is closed, the surface of the door 14 on the inside of the storage board 13 faces the insulating barrier 20 provided on the storage board 13. Accordingly, by providing the packing 19 on the metal fitting 16, the metal fitting 16 comes into contact with the insulating barrier 20 via the packing 19 when the door 14 is closed. A gap corresponding to the thickness (thickness after elastic deformation) is generated. Further, since the filter assembly 17 is fixed to the bracket 16 by screwing or the like, a gap corresponding to at least the thickness of the packing 19 is formed between the filter assembly 17 and the insulating barrier 20. The packing 19 can also be provided at a position corresponding to the position surrounding the opening 16b on the surface of the insulating barrier 20 that faces the receiving metal fitting 16.

  The insulating barrier 20 is a sheet metal, an inner door with a key, or the like provided to prevent a person from touching the energizing portion inside the storage panel 13 and receiving an electric shock when the door 14 is opened. The insulating barrier 20 is formed with a large number of opening holes 20a for ventilation (for example, long hole-shaped opening holes). The opening hole 20a is formed in a size that does not allow a human finger to enter.

  The filter assembly 17 includes a filter 12 and a filter fixing frame 21 to which the filter 12 is fixed.

  As shown in FIG. 9, support portions 21 a into which the filter 12 is inserted are provided at both end portions of the filter fixing frame 21. In addition, fixing portions 21 b are provided at the upper and lower ends of the filter fixing frame 21, and screw through holes 21 c for fixing the filter assembly 17 to the metal fitting 16 are formed in the fixing portion 21 b. The support portion 21 a may be provided at the upper and lower ends of the filter fixing frame 21, and the filter 12 may be fixed to the filter fixing frame 21 by sliding the filter 12 from the side of the filter fixing frame 21. In this case, the fixing portions 21 b are provided at both end portions of the filter fixing frame 21.

[Filter installation procedure]
The procedure for attaching the filter 12 to the metal fitting 16 will be described with reference to FIGS.

  First, the filter assembly 17 is assembled by fixing the filter 12 to the filter fixing frame 21. The filter 12 is inserted into the support portion 21a from above the filter fixing frame 21 (FIG. 10 (a)), and a plurality of screws or piles in the support portion 21a are passed through the holes in the support portion 21a. Thus, the filter 12 is compressed and fixed to the filter fixing frame 21 (FIG. 10B).

  Next, as shown in FIG. 11, the filter assembly 17 is screwed to the receiving metal fitting 16 by attaching a screw (not shown) penetrating the screw through hole 21 c to the female screw portion 16 a. Furthermore, the front cover 15 is screwed to the door 14 by attaching a screw (not shown) penetrating the screw through hole 15a to the female screw portion 14b. In this way, the filter assembly 17 is fixed in close contact with the receiving bracket 16, and the front cover 15 is attached to the door 14 with the filter assembly 17 sandwiched therebetween.

  When the filter 12 is replaced, the filter 12 is removed from the metal fitting 16 by performing a procedure reverse to the procedure for attaching the filter 12.

  According to the filter 12 mounting structure and the storage board 13 according to the second embodiment of the present invention as described above, when the door 14 is closed, a gap is generated between the front side and the back side of the filter assembly 17. . As a result, the filter 12 can be provided on the door 14 without contact between the filter 12 and the front cover 15 or the insulating barrier 20. Then, the cooling air that has passed through the filter 12 can be introduced into the storage board 13.

  Further, since the outer periphery of the filter assembly 17 is sealed with the receiving metal fitting 16 or the like, the intake air that has passed through the front cover 15 passes through the filter 12 without leaking. Therefore, the flow of intake air from the outside to the inside of the storage board 13 is as follows: outside of the storage board 13 → opening hole 15b of the front cover 15 → front side gap → opening on the front side of the filter fixing frame 21 → filter 12 → filter fixing frame 21 side opening 21 d → opening 16 b of the receiving metal fitting 16 → back side gap → opening hole 20 a of the insulation barrier 20 → inside of the storage board 13. That is, since there is no gap in the cooling air inflow path, all the air taken in from the outside of the door 14 (that is, outside the storage panel 13) passes through the filter 12 without leaking, and the inside of the door 14 (that is, inside the storage panel 13). It has a high dustproof effect.

  Further, by providing a gap outside the door 14 of the filter 12 (that is, between the front cover 15 and the filter 12), the area where the filter 12 contacts the intake air can be increased. For example, in the configuration of the filter assembly 17 in FIG. 9, the area of the opening of the filter fixing frame 21 (that is, the area of the filter 12 portion between the support portions 21a) is the area in contact with the intake air.

  Further, by providing the packing 19 between the metal fitting 16 and the insulating barrier 20, a gap can be provided inside the door 14 of the filter 12 (that is, between the insulating barrier 20 and the filter 12). The area to be exhausted can be increased. For example, in the configuration of the filter assembly 17 in FIG. 10A, the area of the twelve square openings 21d on the insulating barrier 20 side of the filter fixing frame 21 is an area in contact with the intake air.

  In the storage board 13, between the air volume Q sucked into the storage board 13, the wind velocity V of the intake air passing through the filter 12, and the area S (the area of the front surface or the back surface of the filter 12) in contact with the air of the filter 12. Theoretically, the relationship of equation (1) holds.

Q = V × S (1)
From the equation (1), if the area S of the filter 12 in contact with the air is increased, the predetermined air volume Q can be secured even if the wind speed V of the intake air passing through the filter 12 is a low value. That is, by providing a gap between the front surface and the back surface of the filter 12, the filter which has been a problem of the prior art (Japanese Patent Application Laid-Open No. 2012-44779) comes into contact with the filter cover (corresponding to the front cover 15 in the second embodiment). It is not the present invention that the contact area between the air and the cooling air is reduced. Thereby, in this invention, even if the wind speed V is low, predetermined | prescribed air volume Q can always be ensured. Since the wind speed V passing through the filter 12 becomes low, the aging damage received by the filter 12 is reduced, and the life of the filter 12 can be extended.

  Moreover, according to the attachment structure of the filter 12 which concerns on 2nd Embodiment of this invention, the filter 12 can be replaced | exchanged, without opening and closing the door 14 of the storage board 13. FIG. That is, there are two parts that need to be removed from the front side of the storage board 13 in order to replace the filter 12, that is, the front cover 15 and the filter assembly 17, and the replacement work of the filter 12 becomes easy. In addition, since the insulating barrier 20 is installed on the storage board 13 when the filter 12 is replaced, even if there is a dangerous place in the storage board 13, the dangerous place is protected by the insulating barrier 20 and there is no risk of touching it. Safety during replacement work is ensured.

  Further, by compressing and fixing the filter 12 to the filter fixing frame 21, the filter 12 can be fixed to the filter fixing frame 21 without making a hole in the filter 12. As a result, even when it is difficult to make a hole in the filter 12 due to the material and manufacturing method of the filter 12, the filter 12 can be easily fixed to the filter fixing frame 21 (and the receiving bracket 16). Will improve. That is, as compared with the filter 1 mounting structure of the first embodiment, the filter 12 mounting structure according to the second embodiment does not require drilling of the filter 12, so that the assembly work of the filter assembly 17 and the filter 12 can be performed. The replacement work becomes easy.

  The filter 12 mounting structure of the second embodiment may be applied not only to the door 14 provided on the front surface of the storage board 13 but also to the door provided on the side surface of the storage board 13 or the back surface of the storage board 13. it can.

  As described above, the filter mounting structure and storage board of the present invention have been described in detail by showing specific embodiments, but the filter mounting structure and storage board of the present invention are not limited to the embodiments, The design can be changed as appropriate without departing from the characteristics of the invention, and the changed design is also included in the technical scope of the present invention.

  For example, the number of filters sandwiched between the pressing plates 6 and 7 is not limited to one, but a plurality of (two or more) filters 1a and 1b are stacked on the pressing plates 6 and 7 as shown in FIG. The filter structure 11 can also be configured by being sandwiched. In this case, the filters 1a and 1b having different coarseness are used (for example, the filters 1a and 1b provided on the outer side of the storage board 2 are used with the coarser filters 1a and 1b). The life can be further extended. Similarly, a plurality of filters 12 having different meshes can be provided on the filter fixing frame 21.

  Moreover, the filter structure 5 is not limited to the form provided in the vent 3a formed in the door 3, but can also be provided in the sheet metal which does not have the opening / closing function which covers the front surface of the storage board 2. FIG. Furthermore, it is also possible to form a vent hole in a sheet metal provided on the side surface or the back surface of the storage board 2 and provide the filter structure 5 in the vent hole.

  Further, the openings 6a and 7a formed in the holding plates 6 and 7 are not limited to four, and the opening that allows the cooling air to pass through the filter 1 and flow into the storage board 2 is the holding plate. 6,7. Similarly, the shapes of the opening 16b formed in the receiving metal fitting 16 and the opening 21d formed in the filter fixing frame 21 are not limited to the embodiment.

  Further, the filter holding frame 3b is not limited to the one formed integrally with the door 3, and the filter holding frame 3b may be separately provided on the door 3 or the sheet metal.

DESCRIPTION OF SYMBOLS 1, 1a, 1b, 12 ... Filter 2, 13 ... Storage board 3,14 ... Door 3a ... Vent 3b ... Filter holding frame 4 ... Filter cover 5, 11 ... Filter structure 6, 7 ... Holding plate (frame)
6a, 7a ... Openings 8, 10 ... Spacer 9 ... Screw 14a ... Intake hole (ventilation hole), 14b ... Female screw part 15 ... Front cover, 15a ... Screw through hole, 15b ... Opening hole 16 ... Bracket, 16a ... Female screw part, 16b ... opening 17 ... filter assembly 18 ... welded part 19 ... packing (seal member)
DESCRIPTION OF SYMBOLS 20 ... Insulation barrier, 20a ... Opening hole 21 ... Filter fixing frame 21a ... Support part, 21b ... Fixing part, 21c ... Screw through-hole, 21d ... Opening part

Claims (6)

A filter mounting structure provided in a vent formed in the storage board,
A filter holding frame that is formed on the storage board so as to surround the vent and holds the filter;
A spacer for separating the filter from the opening on the vent hole side of the filter holding frame,
A filter structure is configured by sandwiching the filter such that the end of the filter protrudes from the end of the frame with a pair of frames,
Forming the depth of the filter holding frame deeper than the thickness of the filter structure plus the thickness of the spacer;
The filter structure is attached to the filter holding frame so that the end of the filter protruding from the end of the frame closes the space between the inner periphery of the filter holding frame and the end of the filter structure. A filter mounting structure characterized by being provided. Forming the vertical width of the filter holding frame narrower than the vertical width of the filter and wider than the vertical width of the frame;
2. The filter mounting structure according to claim 1, wherein a width of the filter holding frame in the horizontal direction is narrower than a width of the filter in the horizontal direction and wider than a width of the frame in the horizontal direction. . The filter mounting structure according to claim 1, wherein a plurality of filters having different eye roughnesses are provided between the frames. A filter mounting structure provided in a vent hole formed in the door of the storage board,
An insulating barrier provided with an opening hole through which air sucked into the storage board passes, and provided facing the inner surface of the door when the door is closed;
A front cover that has an opening hole through which air sucked into the storage board passes, and is provided at an opening end of the vent hole outside the door;
A receiving metal fitting having an opening through which air sucked into the storage board passes, and provided in the vent hole;
A filter fixing frame to which the filter is fixed;
A surface facing the insulating barrier of the metal fitting, or a seal member provided on a surface of the insulating barrier facing the metal fitting,
The dimension in the depth direction of the metal fitting is larger than the thickness of the filter fixing frame to which the filter is fixed,
When the door is closed, the seal member is sandwiched between the insulating barrier and the metal fitting,
The filter fixing frame to which the filter is fixed is detachably provided on the metal fitting from the outside of the storage board,
A filter mounting structure, wherein the front cover is provided apart from a filter fixed to the receiving metal via the filter fixing frame. The filter mounting structure according to any one of claims 1 to 4, wherein the storage board stores a power conversion device.   A storage board having the filter mounting structure according to any one of claims 1 to 5.

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