JP4599143B2 - Filter media exchange type air filter - Google Patents

Description

  The present invention relates to a filter medium exchange type air filter.

  The filter medium exchange type air filter is a filter medium in which a zigzag-shaped filter medium is exchangeably accommodated in a filter frame that supports the periphery of the filter medium in an airtight state with the zigzag-shaped end thereof being directed up and down. It consists of a lower plate and an upper plate that respectively support the lower end and upper end of the filter medium, and left and right side plates that respectively support both sides of the filter medium.

In this type of air filter, conventionally, the filter frame is joined to the left and right ends of the lower frame with the lower ends of the left and right side plates, and the left and right side plates receive the filter medium in the filter frame from the downstream side of the filtered air flow. A structure in which the left and right ends of the upper plate are detachably coupled to the upper ends of the left and right side plates (see Patent Document 1), and the filter frame is connected to the left and right ends of the lower frame. A structure in which the lower ends of the left and right side plates are supported so as to be tiltable in the direction to open outward from the frame, and the left and right ends of the upper plate are detachably coupled to the upper ends of the left and right side plates, respectively (see Patent Document 2). In any air filter, the filter medium is exchanged by removing the upper plate and taking in and out the filter medium from above.
JP 2003-88720 A Japanese Patent No. 3460032

  An air filter with a filter frame in which the left and right side plates are joined to the left and right ends of the lower frame and the left and right side plates are connected by a plurality of horizontal rails has high filter frame rigidity, but it is cumbersome to replace the filter media. is there.

  That is, in this air filter, since the distance between the left and right side plates of the filter frame is defined by the lower plate and the plurality of horizontal rails, the dimension between these side plates is set to the width of the filter medium (the direction bent in a zigzag shape). And the both sides of the filter medium are brought into airtight contact with the inner surfaces of the left and right side plates by the elasticity of the zigzag filter medium.

  Therefore, when removing the upper plate of the filter frame and exchanging the filter medium, this air filter has both sides of the filter medium on the inner surfaces of the left and right side plates of the filter frame and the upper plate coupling portion provided on the upper ends of these side plates. Therefore, the exchange of the filter medium is troublesome, and depending on the material of the filter medium, the filter medium may be damaged by being caught on the upper plate coupling portion of the side plate.

  On the other hand, the lower frame is provided with a filter frame in which the lower ends of the left and right side plates are supported to be tiltable in the direction of opening outwardly from the left and right sides, and the left and right ends of the upper plate are detachably coupled to the upper ends of the left and right side plates The air filter removes the upper plate of the filter frame and tilts the left and right side plates in the direction to open outward from the frame, so that the filter medium can be put in and out without resistance. Therefore, the filter medium is easily and without being damaged. Can be exchanged.

  However, in this air filter, the filter frame is configured such that the lower ends of the left and right side plates are tiltably supported on the left and right ends of the lower frame, so the rigidity of the filter frame is weak, and the filter frame is pushed and pulled in the horizontal direction. In some cases, it tends to cause rhomboid deformation.

  For this reason, this air filter may damage the internal filter medium due to the rhomboid deformation of the filter frame when it is pushed or pulled out by a lateral slide or the like to the filter installation part.

  Moreover, this air filter needs to regulate the opening angle of the side plate by connecting the left and right side plates with an extendable connecting member in order to prevent the left and right side plates of the filter frame from opening too much. The structure of the filter frame is complicated and the cost is high.

  An object of the present invention is to provide a filter medium exchange type air filter that can easily replace a filter medium without damaging the filter medium, sufficiently increase the rigidity of the filter frame, and reduce the cost. It is a thing.

The filter medium replacement type air filter of the present invention comprises a zigzag filter medium, and a filter frame that accommodates the filter medium in an exchangeable manner with the zigzag end directed up and down, and supports the periphery of the filter medium in an airtight state. Prepared,
The filter frame is composed of a lower plate and an upper plate that respectively support a lower end and an upper end of the filter medium, and left and right side plates that respectively support both sides of the filter medium,
The rear edge of the lower plate corresponding to the downstream side of the filtered air flow is provided with a first overhang plate that extends upward from the rear edge and has a plurality of ventilation openings over substantially the entire length thereof,
The rear edge corresponding to the downstream side of the upper plate is provided with a second overhanging plate that extends downward from the rear edge and has a plurality of ventilation openings over substantially the entire length thereof,
The lower ends of the left and right side plates are respectively joined to the left and right ends of the lower plate by fixing the other end to a bent portion formed at one end of the lower plate and the side plate ,
The lower end side portion and the upper end side portion of the filter medium housed in the filter frame are received from the downstream side by the first extension plate and the second extension plate, and the left and right side plates are The left and right ends of the first projecting plate and the left and right ends of the second projecting plate are brought into contact with each other, and the left and right ends of the upper plate are detachably coupled to the upper ends of the left and right side plates, respectively .
When the upper plate is removed, the left and right side plates are each elastically deformed by the weight of the left and right side plates, and the upper end side is inclined in a direction to open outward from the frame.

In the air filter of the present invention, it is preferable that the plurality of ventilation openings of the first overhanging plate and the plurality of ventilation openings of the second overhanging plate are respectively arranged in two upper and lower rows .

In addition, it is preferable that the plurality of ventilation openings of the first and second overhanging plates are arranged in correspondence with portions of the filter medium that avoid the zigzag holding beads.

  The filter medium replacement type air filter according to the present invention has a filter frame, the lower end of the left and right side plates at the left and right ends of the lower plate, and the other end at the bent portion formed at one end of the lower plate and the side plate. When the upper plate is removed by fixing and joining the parts, the left and right side plates are configured to elastically deform the bent portion by its own weight so that the upper end side is inclined to open outward from the frame. Therefore, the filter medium can be replaced easily and without being damaged.

And this air filter provides the 1st overhanging plate which receives the part of the lower end side of the above-mentioned filter material from the downstream side of the filtration air flow toward the rear edge of the lower plate of the filter frame from the rear edge, Since a second overhanging plate is provided on the rear edge of the upper plate of the filter frame and receives the upper end side portion of the filter medium from the downstream side of the filtered air flow from the rear edge downward. And the upper plate has the strength like an L-shaped angle material . In addition, the lower ends of the left and right side plates are joined to the left and right ends of the lower plate via the bent portions, and the left and right side plates are in contact with the left and right ends of the first and second extension plates. Since the left and right ends of the upper plate are detachably coupled to the upper ends of these side plates, the rigidity of the filter frame can be sufficiently increased. Therefore, the filter frame does not deform into a rhombus shape and damages the internal filter medium when being pushed or pulled out by a horizontal slide or the like to the filter installation portion.

  Further, the air filter has an opening angle to the outside of the frame due to the weight of the left and right side plates when the upper plate of the filter frame is removed, and is within a range of angle change due to elastic deformation of the bent portion. The side plates do not open too much. Therefore, it is not necessary to restrict the opening angle of the side plates by connecting the left and right side plates with a connecting member that can be expanded and contracted as in Patent Document 1, so that the configuration of the filter frame is simplified. Cost can be reduced.

In addition, since this air filter has a plurality of ventilation openings formed on the first and second projecting plates provided at the rear edges of the lower and upper plates of the filter frame , the air flow rate is sufficiently increased. Can be secured.

In this air filter, it is preferable that the plurality of ventilation openings of the first projecting plate and the second projecting plate are formed in an array corresponding to the portion of the filter medium avoiding the zigzag-shaped holding bead. Further, it is possible to ensure a sufficient amount of ventilation.

  1 to 6 show an embodiment of the present invention, FIG. 1 is a perspective view of a filter medium exchange type air filter, FIG. 2 is an exploded perspective view of the air filter, and FIGS. 3 and 4 are top views of a filter frame. FIG. 5 is an enlarged cross-sectional view of a joining portion between the upper plate and the side plate, and FIG. 6 is an enlarged cross-sectional view of a joint portion between the lower plate and the side plate.

  The filter medium exchange-type air filter includes a zigzag filter medium 1 and a filter frame 3 that accommodates the filter medium 1 in a state where the zigzag end is directed up and down and supports the periphery of the filter medium 1 in an airtight state. I have.

  The filter medium 1 is formed by bending a glass fiber or synthetic resin fiber non-woven fabric into a zigzag, and a plurality of zigzag-shaped holding beads 2 connecting the zigzag bent portions on both sides thereof are zigzag of the filter medium 1. It is provided in parallel with the shape end.

  The filter frame 3 includes a lower plate 4 and an upper plate 5 that respectively support the zigzag lower and upper ends of the filter medium 1, and left and right side plates 6 and 7 that respectively support both sides of the filter medium 1. The plate 4 and the upper plate 5 and the side plates 6 and 7 are formed of a metal plate or a synthetic resin plate.

Then, the lower plate 4 extends vertically upward from the rear edge to the rear edge corresponding to the downstream side (secondary side) of the filtered air flow passing through the filter medium 1 over substantially the entire length thereof . A first overhanging plate 8 is provided, and the upper plate 5 is provided with a second overhanging plate 9 extending vertically downward from the rear edge over the substantially entire length of the rear edge corresponding to the downstream side. ing. The first overhanging plate 8 and the second overhanging plate 9 receive the lower end side portion and the upper end side portion of the filter medium 1 from the downstream side , respectively, and on the inner surfaces of the left and right side plates 6 and 7 at the left and right ends. Abut.

The lower plate 4 and the first overhanging plate 8 are integrally formed by bending one metal plate, and the upper plate 5 and the second overhanging plate 9 are formed by bending another metal plate. It is integrally formed . Further , as shown in FIGS. 3 and 4, the first overhanging plate 8 and the second overhanging plate 9 are bent at the inner edges of the overhanging plates 8 and 9, respectively. The filter medium 1 is configured to be received from the downstream side of the filtered air flow.

The first projecting plate 8 and the second projecting plate 9 are respectively formed with a plurality of vent holes 10 and 11, which vent the zigzag holding beads 2 of the filter medium 1. An array is formed corresponding to the avoided portion.

In this embodiment, as shown in FIG. 3 and FIG. 4, the edge of the filter medium 1 and its end are respectively provided on the first overhanging plate 8 provided on the lower plate 4 and the second overhanging plate 9 provided on the upper plate 5. A plurality of vents 10 and 11 are formed in two upper and lower rows corresponding to a portion between the bead 2 closest to the edge and a portion between the bead 2 closest to the edge and the next bead 2. Further, the projecting end of the projecting plates 8 and 9 corresponds to the next bead 2 of the bead closest to the end edge, and the bead 2 closest to the end edge is connected to the two rows of vents 10 and 10 and 11, The horizontal crosspieces between 11 correspond to each other, and the extended ends of the extended plates 8 and 9 correspond to the next bead 2.

  Further, the front edge of the lower plate 4 and the upper plate 5 corresponding to the upstream side (primary side) of the filtered air flow has a protruding height that does not affect the filtered air flow over its entire length, Projections 4a and 5a that reinforce the plate 5 and hold the edge of the filter medium 1 from the upstream side are bent.

  Further, bent portions 12 that are vertically bent upward from the lower plate 4 are formed at the left and right ends of the lower plate 4, and the lower end portions of the left and right side plates 6 and 7 respectively have outer surfaces thereof as described above. The lower plate 4 is joined to the left and right ends by being in close contact with the inner surface of the bent portion 12 and being fixed to the bent portion 12 with rivets 13.

  On the other hand, the left and right ends of the upper plate 5 are provided with side plate holding portions 14 that are bent vertically downward from the upper plate 5 and hold the upper ends of the left and right side plates 6 and 7 from their outer surfaces, respectively. A plurality of protrusions 15 are provided on the outer surfaces of the upper end portions of the left and right side plates 6, 7, and a plurality of protrusion fitting holes for fitting the plurality of protrusions 15 in the side plate holding portions 14 at the left and right ends of the upper plate 5. 16 is provided.

The left and right side plates 6, 7 having lower ends fixed to the bent portions 12 at the left and right ends of the lower plate 4 have first and second inner surfaces provided at the rear edges of the lower plate 4 and the upper plate 5 , respectively. In this state, the left and right ends of the upper plate 5 are respectively connected to the left and right ends of the second projecting plates 8 and 9, and the left and right ends of the upper plate 5 are respectively connected to the side plate holding portions 14. The plurality of protrusions 15 are fitted into the fitting holes 16 so as to be detachably coupled to the outer surface of the upper end portion of the side plate.

  The front and rear edges of the left and right side plates 6 and 7 have projecting widths that do not affect the filtered air flow over their entire length, reinforce the side plates 6 and 7, and filter the side edges of the filter medium 1. The protrusions 6a and 7a that are held from the upstream side and the downstream side are bent, and these protrusions 6a and 7a are formed so that the left and right side plates 6 and 7 stand vertically, and the lower plate 4 and the upper plate The left and right ends of 5 are held from the front-rear direction.

  Further, on the inner surfaces of the lower plate 4 and the upper plate 5 and the left and right side plates 6 and 7, an elastic sealing material 17 (see FIGS. 3 to 6) for supporting the periphery of the filter medium 1 in an airtight state over substantially the whole. ) Is provided.

  In this air filter, the filter medium 1 is exchanged by removing the upper plate 5 of the filter frame 3 and allowing the filter medium 1 to be taken in and out from above the filter frame 3. When the upper plate 5 is removed, the upper end side is inclined in the direction to open outward from the frame as shown in FIG.

  In this air filter, the filter frame 3 is fixed by rivets 13 to the left and right ends of the lower plate 4 and the lower ends of the left and right side plates 6 and 7 to the bent portions 12 formed at the left and right ends of the lower plate 4, respectively. When the upper plate 5 is removed, the left and right side plates 6 and 7 are configured so that the bent portion 12 is elastically deformed by its own weight and the upper end side is inclined to open outward from the frame. Therefore, when replacing the filter medium 1 by removing the upper plate 5 of the filter frame 3, the filter medium 1 can be taken in and out without resistance. Therefore, the filter medium can be replaced easily and without being damaged. .

In addition, this air filter is provided with a first overhanging plate 8 extending upward from the rear edge over the substantially entire length of the rear edge of the lower plate 4 of the filter frame 3, and the rear plate of the upper plate 5 of the filter frame 3. Since the second overhanging plate 9 extending downward from the rear edge is provided on the edge over substantially the entire length, the lower plate 4 and the upper plate 5 have the strength of an L-shaped angle member . Further, the lower ends of the left and right side plates 6, 7 are joined to the left and right ends of the lower plate 4 via the bent portion 12, and the left and right side plates 6, 7 are connected to the first projecting plate 8 and the second projecting plate 9 . Since the left and right ends of the upper plate 5 are detachably coupled to the upper ends of the side plates 6 and 7 in contact with the left and right ends, the rigidity of the filter frame can be sufficiently increased. Therefore, the filter frame 3 is not deformed into a rhombus shape and damaged inside the filter medium when the filter frame is pushed or pulled out by a horizontal slide or the like.

  Further, the air filter has an opening angle to the outside of the frame due to the weight of the left and right side plates 6 and 7 when the upper plate 5 of the filter frame 3 is removed within the range of the angle change due to the elastic deformation of the bent portion 12. Therefore, the side plates 6 and 7 do not open too much, and therefore it is not necessary to restrict the opening angle of the side plates by connecting the left and right side plates with a connecting member that can be expanded and contracted as in Patent Document 1. The configuration of the filter frame 3 can be simplified and the cost can be reduced.

  The air filter is provided with a side plate holding portion 14 that is bent downward at the left and right ends of the upper plate 5 of the filter frame 3 and holds the upper ends of the left and right side plates 6 and 7 from the outer surface thereof. 7 and the side plate holding portion 14 of the upper plate 5 are coupled by fitting with a plurality of projections 15 provided on one side and a plurality of projection fitting holes 16 provided on the other side, Attachment and removal of the upper plate 5 from the upper ends of the left and right side plates 6 and 7 can be simplified, and replacement of the filter medium 1 can be facilitated.

In addition, the air filter has a plurality of ventilation openings 10 and 11 formed in a first overhanging plate 8 and a second overhanging plate 9 provided at the rear edges of the lower plate 4 and the upper plate 5 of the filter frame 3, respectively. Therefore, a sufficient amount of ventilation can be ensured.

Furthermore, in the said Example, since the several ventilation port 10,11 of each said overhang | projection board 8 and 9 is arranged correspondingly to the part which avoided the zigzag-shaped holding bead 2 of the filter medium 1, the ventilation volume is set. Further, it can be sufficiently secured.

In the above embodiment, the lower plate 4 and the first overhanging plate 8 and the upper plate 5 and the second overhanging plate 9 of the filter frame 3 are each integrally formed by a single metal plate . The first overhanging plate 8 and the second overhanging plate 9 may be formed separately from the lower plate 4 and the upper plate 5 and fixed to the rear edges of the lower plate 4 and the upper plate 5 with rivets or the like.

  In the above embodiment, the bent portions 12 are formed at the left and right ends of the lower plate 4 of the filter frame 3, and the lower ends of the left and right side plates 6 and 7 are fixed to the bent portions 12. Alternatively, a bent portion may be formed at the lower ends of the left and right side plates 6 and 7, and the bent portion may be fixed to the left and right ends of the lower plate 4 with rivets or the like.

  Further, in the above embodiment, the side plate holding portions 14 provided at the left and right ends of the upper plate 5 of the filter frame 3 are fitted to the upper ends of the left and right side plates 6 and 7 with the plurality of protrusions 15 and their fitting holes 16. The side plate holding portion 14 of the upper plate 5 may be connected to the upper end portions of the side plates 6 and 7 by screws, and in that case, the upper plate 5 may be connected to the upper ends of the left and right side plates 6 and 7. The upper plate 5 can be easily attached and detached.

The perspective view of the filter medium exchange type air filter which shows one Example of this invention. The disassembled perspective view of the said air filter. The expanded sectional view of the rear edge part of the upper board of a filter frame. The expanded sectional view of the rear edge part of the lower board of a filter frame. The expanded sectional view of the connection part of the upper plate and side plate of a filter frame. The expanded sectional view of the junction part of the lower board and side board of a filter frame.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1 ... Filter medium, 2 ... Zigzag-shaped holding bead, 3 ... Filter frame, 4 ... Lower plate, 5 ... Upper plate, 6, 7 ... Side plate, 8, 9 ... Overhang plate, 10, 11 ... Ventilation opening, 12 ... Bending Reference numeral 13: Rivet, 14: Side plate holding part, 15: Protrusion, 16: Protrusion fitting hole, 17: Elastic seal material

Claims (3)

A zigzag-shaped filter medium, and a filter frame that accommodates the filter medium in a state where the zigzag-shaped end thereof is directed upward and downward, and supports the periphery of the filter medium in an airtight state,
The filter frame is composed of a lower plate and an upper plate that respectively support a lower end and an upper end of the filter medium, and left and right side plates that respectively support both sides of the filter medium,
The rear edge of the lower plate corresponding to the downstream side of the filtered air flow is provided with a first overhang plate that extends upward from the rear edge and has a plurality of ventilation openings over substantially the entire length thereof,
The rear edge corresponding to the downstream side of the upper plate is provided with a second overhanging plate that extends downward from the rear edge and has a plurality of ventilation openings over substantially the entire length thereof,
The lower ends of the left and right side plates are respectively joined to the left and right ends of the lower plate by fixing the other end to a bent portion formed at one end of the lower plate and the side plate ,
The lower end side portion and the upper end side portion of the filter medium housed in the filter frame are received from the downstream side by the first extension plate and the second extension plate, and the left and right side plates are The left and right ends of the first projecting plate and the left and right ends of the second projecting plate are brought into contact with each other, and the left and right ends of the upper plate are detachably coupled to the upper ends of the left and right side plates, respectively .
The filter medium exchange type air filter, wherein when the upper plate is removed, the left and right side plates are elastically deformed by the weight of each of the left and right side plates and the upper end side is inclined in a direction to open outward from the frame. 2. The filter medium exchange type air filter according to claim 1, wherein the plurality of ventilation openings of the first overhanging plate and the plurality of ventilation openings of the second overhanging plate are respectively arranged in two upper and lower rows. . A plurality of zigzag retaining beads are provided on both sides of the filter medium in parallel with the zigzag end of the filter medium, and the plurality of ventilation openings of the first and second extending plates respectively connect the beads of the filter medium. The filter medium exchange type air filter according to claim 1 or 2, wherein the filter medium exchange type air filter is arranged so as to correspond to the portion to be avoided.

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