JP5333196B2 - Air filter and filter holder for air filter - Google Patents

Description

  The present invention relates to an air filter used for an air cleaner of an engine, for example, and a filter medium holder for an air filter.

  Conventionally, in this type of air filter, a configuration in which a frame portion made of a high-rigidity synthetic resin of polypropylene is fixed to an outer peripheral portion or an intermediate portion of a wavy filter medium made of a nonwoven fabric made of PET (polyethylene terephthalate) is known. ing. Therefore, in the air filter of this conventional configuration, it is difficult to separate the filter medium and the frame portion. Therefore, the incineration process cannot be performed, and the entire air filter needs to be landfilled as an incombustible material.

  On the other hand, as a conventional air filter, for example, a configuration disclosed in Patent Document 1 has been proposed. In this conventional configuration, a flat deodorizing filter and a wave-like dust collecting filter are detachably mounted in a square box-shaped filter frame made of synthetic resin. The dust collection filter has a configuration in which an enclosure is provided on the outer periphery of the filter medium. And a deodorizing filter and a dust collection filter are hold | maintained in an installation state in a filter frame.

JP-A-9-136536

  In the conventional configuration described in Patent Document 1, since the filter frame is formed separately from the deodorization filter and the dust collection filter, they can be separated. However, it is difficult to configure the filter medium that requires the dust collection function and the enclosure part that requires rigidity with the same material in the dust collection filter, and thus it is difficult to separate the filter medium and the enclosure part, This dust collection filter still needed to be landfilled. Furthermore, since the dust collection filter has an integral structure with the wavy filter medium and the enclosure, if the filter medium becomes dirty due to dust collection, the entire dust collection filter including the enclosure must be discarded. It was an economy.

  Moreover, in the manufacture of dust collecting filters, the filter medium is set in the mold and the material of the enclosure is injected into the mold, or the filter medium is bonded to the inner surface of the frame-shaped enclosure. A way to do it is needed. Therefore, the dust collection filter of Patent Document 1 takes time to manufacture.

  The present invention has been made paying attention to such problems existing in the prior art. An object of the present invention is to provide an air filter and a filter medium holder for an air filter that can be easily discarded when the filter medium is contaminated, and that can be easily manufactured.

In order to achieve the above object, the present invention can attach and detach a plurality of plate-shaped filter media between a first frame and a second frame that are combined through an engaging means that is detachably engaged. The engagement means is removably engaged with the engaged portions and a plurality of engaged portions arranged on the first frame along the laminating direction of the filter media. Thus, it is characterized by comprising an engaging portion formed on the second frame .

  Therefore, when the air filter of the present invention is used for an air cleaner, only a filter medium having a large amount of dirt on the upstream side of the air flow among a plurality of stacked filter media can be discarded. Moreover, since the filter medium and both frames are formed separately, when the entire air filter is discarded, the filter medium and both frames can be separated and discarded. And since a filter medium and both frames are a different body, they should just be manufactured separately and the manufacture is easy.

  In the above configuration, the seal portion attached to the case of the air cleaner in a sealed state is formed on the outer periphery of the first frame, and the engaging portion of the second frame is formed on the first frame in both the front and back sides of the second frame. It is good to form in the shape which can be engaged with a to-be-engaged part.

The said structure WHEREIN: It is good to provide the means for preventing that they are assembled | attached in an inclined state between the said 1st frame and the 2nd frame.
The said structure WHEREIN: It is good to provide a highly rigid part in the outer periphery of the said filter medium.

  As a filter medium holder for an air filter used for an air filter, a first frame and a second frame that are detachably combined via engagement means so as to form an interval for holding the filter medium in a stacked state. And the engagement means is detachably engaged with a plurality of engaged portions arranged on the first frame so as to follow the stacking direction of the filter media. It is preferable to configure with an engaging portion formed in two frames.

  As described above, according to the present invention, the filter medium can be disposed of in order from the contaminated portion, and the filter medium and the frame can be separated and disposed of, and the manufacturing is facilitated. To do.

Sectional drawing which shows the air cleaner provided with the structure of 1st Embodiment. The disassembled perspective view of the air filter of FIG. The fragmentary sectional view which expands and shows the filter medium of the air filter. Sectional drawing for demonstrating the processing method when a filter medium becomes dirty in the air filter. (A) And (b) is a partial expanded sectional view which shows the engagement state of the to-be-engaged part of the 1st frame in the filter medium holder for air filters, and the engaging part of the 2nd frame. Sectional drawing which shows the processing method when a filter medium becomes dirty following FIG. (A) is a principal part disassembled perspective view which shows 2nd Embodiment, (b) is a partial cross section figure. (A) And (b) is a fragmentary sectional view which shows the engagement state of the to-be-engaged part of a 1st frame and the engaging part of a 2nd frame in 3rd Embodiment.

(First embodiment)
Below, the structure of the air filter of 1st Embodiment which actualized this invention and the air cleaner provided with the air filter is demonstrated according to drawing of FIGS.

  As shown in FIG. 1, in the air cleaner of this embodiment, the housing 11 is composed of a lower first case 12 and an upper second case 13, and these cases 12, 13 are the outer peripheral edges of the opening. The flange portions 12a and 13a are connected to each other so as to be openable and closable using a clamp fitting (not shown). An inlet 14 is formed on the side wall of the first case 12. An outlet 15 is formed on the side wall of the second case 13. The inlet 14 is opened to the atmosphere, and the outlet 15 is connected to the intake side of the engine.

  As shown in FIGS. 1 and 2, an air filter 16 is sandwiched between the flange portions 12 a and 13 a of the cases 12 and 13. The air filter 16 is formed of a substantially square frame-shaped first and second frames 17 and 18 that are detachably combined, and a nonwoven fabric that is detachably held in a space between the frames 17 and 18. It is composed of one or a plurality of flat filter media 19. The air filter medium holder 10 is constituted by both the frames 17 and 18. The number of the filter media 19 can be arbitrarily set as will be described later. Both frames 17 and 18 are made of polypropylene. On the other hand, the filter medium 19 is formed of PET. As shown in FIG. 3, a high-rigidity portion 20 for holding the filter medium 19 in a flat plate shape is formed on the outer periphery of the filter medium 19 by compression molding under application of high heat.

  The first frame 17 and the second frame 18 are assembled via an engagement structure 21 as an engagement means that is detachably engaged, and the interval is formed therebetween. Inside the four corners of the second frame 18 are formed frame-shaped holding portions 22 for pressing and holding the four corner portions of the filter medium 19 against the first frame 17 side. On the outer periphery of the first frame 17, a seal portion 23 is formed which is attached in a sealed state between the flange portions 12a and 13a of the air cleaner cases 12 and 13.

  Guide members 24 </ b> A and 24 </ b> B project from the four side edge portions of the first frame 17 so as to extend in the stacking direction of the filter media 19. Then, when the first frame 17 and the second frame 18 are assembled, the guide members 24A, 24B are in uniform contact with the inner peripheral surface of the corresponding side edge of the second frame 18, whereby both the frames 17, 18 are contacted. Assembling is guided and is prevented from being assembled in an inclined state. Therefore, the guide members 24A and 24B constitute prevention means for preventing the frames 17 and 18 from being assembled in an inclined state.

  The engagement structure 21 between the first frame 17 and the second frame 18 has a plurality of claw-like engaged portions 25A and 25B arranged on the outer surfaces of the guide members 24A and 24B on the first frame 17. And square frame-like engaging portions 26A, 26B formed on the side edges of the second frame 18 so as to be detachably engaged with the engaged portions 25A, 25B. Then, the engagement portions 26A and 26B are selectively engaged with the engaged portions 25A and 25B according to the laminated thickness of the filter medium 19, thereby adjusting the distance between the frames 17 and 18. Thus, the filter medium 19 is sandwiched and held between both the frames 17 and 18.

  As shown in FIGS. 2 and 5, the engaged portion 25A on the guide member 24A disposed at two opposing side edge portions of the first frame 17 and the other two opposing side edge portions. The engaged portion 25B on the guide member 24B arranged in the position is formed in a state in which the position is shifted in the arrangement direction by a half pitch P / 2 of the arrangement pitch P. On the other hand, the engaging portions 26A and 26B on the second frame 18 side are formed at the same height position. Then, the engagement of the engagement portion 26A with the engaged portion 25A and the engagement of the engagement portion 26B with the engaged portion 25B are alternately performed, thereby depending on the thickness of the stacked filter media 19. The assembly position of the first frame 17 and the second frame 18, that is, the interval between them, is changed by a half pitch P / 2 of the arrangement pitch P of the engaged portions 25A and 25B. In the drawing, the arrangement pitch of the engaged portions 25A and 25B is drawn roughly, but actually, the engaged portions 25A and 25B are formed at a finer pitch, and the above is changed for each one of the filter media 19. .

  As shown in FIG. 4, when the number of the filter media 19 is large, the second frame 18 is face-up with the engaging portions 26 </ b> A and 26 </ b> B protruding toward the first frame 17. 17 is assembled. In this assembled state, one-side inner edges 26a of the rectangular frame-like engaging portions 26A, 26B are engaged with the engaged portions 25A, 25B. On the other hand, as shown in FIG. 6, when the number of stacked filter media 19 is reduced, the second frame 18 has the engagement portions 26 </ b> A and 26 </ b> B protruding from the first frame 17 on the opposite side. In the state of orientation, it is assembled to the first frame 17. In this assembled state, the other side inner edges 26b of the square hole-shaped engaging portions 26A, 26B are engaged with the engaged portions 25A, 25B.

Next, the operation of the air cleaner including the air filter 16 configured as described above will be described.
In the state shown in FIG. 1, the air filter 16 is mounted in the air cleaner cases 12 and 13, the second frame 18 side of the air filter 16 is disposed on the first case 12 side, and the second frame 18 side is air flow. It is arranged on the upstream side. When an engine (not shown) is operated in this state, air in the atmosphere flows into the first case 12 from the inlet 14, passes through the filter medium 19 of the air filter 16, and is guided into the second case 13. , And supplied to the intake side of the engine via the outlet 15. Accordingly, dust or the like contained in the air is captured and removed by the filter medium 19.

  As described above, when dust or the like is captured, the upstream side of the air flow among the plurality of stacked filter media 19 becomes dirty. When the filter medium 19 on the most upstream side of the air flow becomes dirty, the air filter 16 is taken out from the air cleaner cases 12 and 13 as shown in FIG. If it arrange | positions so that it may become the upper side of the frame 17, the filter medium 19 with a big dirt will be arrange | positioned in the uppermost part. Thereafter, when the guide members 24A and 24B on the first frame 17 are bent inward against the elastic force, the engagement between the engaged portions 25A and 25B and the engaging portions 26A and 26B is released. . If the second frame 18 is removed from the first frame 17 in this state, the uppermost filter medium 19 with large dirt can be removed and discarded.

  Then, after removal of the filter material 19 having a large amount of dirt, the second frame 18 is assembled on the first frame 17 in substantially the reverse order of the above operation, and the holding portions 22 at the four corners of the second frame 18 hold the filter material 19. When the engaged portions 25A and 25B are engaged with the engaging portions 26A and 26B so as to be in the position, both the frames 17 and 18 are held in the assembled state. For this reason, the remaining filter medium 19 is held in a laminated state between the frames 17 and 18. Thereafter, as shown in FIG. 1, if the entire air filter 16 is mounted in the air cleaner cases 12 and 13, it can be used again to remove dust and the like in the intake air to the engine. At this time, the ventilation resistance of the entire air filter 16 is restored with the disposal of the filter medium 19 having a large amount of dirt. On the other hand, dust is trapped to some extent on the filter medium 19 other than the discarded filter medium 19, and the filter eyes of the filter medium 19 become finer. Therefore, even if the filter medium 19 with a large amount of dirt is discarded, the trapping function for dust and the like is hardly deteriorated, and a high trapping function can be maintained as a filter.

  On the other hand, when assembling the second frame 18 on the first frame 17, when the number of stacked filter media 19 is small, the second frame 18 is removed from the first frame 17, as shown in FIG. 6. In addition, the second frame 18 is assembled to the first frame 17 with the front and back being reversed. In this way, the other inner edges 26b of the rectangular frame-shaped engaging portions 26A, 26B are engaged with the engaged portions 25A, 25B, and both the frames 17, 18 are assembled in a state where the distance between them is narrow. It is done. In this case, since the surface opposite to the engaging portions 26A, 26B contacts the filter medium 19 in each holding section 22 on the second frame 18, the filter medium 19 having a small number of stacked layers is placed between the frames 17, 18. It can be held stably. Therefore, if the air filter 16 in this state is set in the housing 11, air passes through the filter medium 19 in the same direction as described above, and dust and the like can be captured in the same manner as described above.

Therefore, according to this embodiment, the following effects can be obtained.
(1) In this embodiment, a plurality of plate-shaped filter media 19 are detachably stacked between the first frame 17 and the second frame 18 that are combined via a detachable engagement structure 21. Is arranged in. Therefore, among the plurality of filter media 19 in the stacked state, the contamination becomes larger as the filter media 19 arranged on the upstream side of the air flow. In this case, since the engagement between the first frame 17 and the second frame 18 can be released and the filter medium 19 having a large amount of dirt can be discarded in order, it is not necessary to replace the entire air filter 16 and it is economical. . Moreover, since it is only necessary to discard the filter medium 19, a separation process is unnecessary, and an incineration process is possible.

  (2) In this embodiment, when the entire air filter 16 is discarded, the filter medium 19 and the two frames 17 and 18 are formed separately, so that they can be separated and processed for each material. it can.

  (3) In this embodiment, the engagement structure 21 includes a plurality of engaged portions 25A and 25B arranged on the first frame 17 along the stacking direction of the filter media 19, and the engaged portions. It is comprised by engagement part 26A, 26B formed in the 2nd frame 18 so that 25A, 25B may be engaged detachably. Therefore, the engagement positions of the engaged portions 25A, 25B and the engaging portions 26A, 26B can be changed according to the stacking thickness of the filter media 19, and both the frames 17 can be used regardless of the number of the filter media 19. , 18 can be stably held in a laminated state.

  (4) In this embodiment, a seal portion 23 is formed on the outer periphery of the first frame 17 in a sealed state with respect to the air cleaner cases 12, 13, and the air filter 16 is attached to the air cleaner cases 12, 13. In the mounted state, the second frame 18 is configured to be arranged on the upstream side of the air flow. Further, the engaging portions 26A and 26B of the second frame 18 are formed in a shape that can be engaged with the engaged portions 25A and 25B of the first frame 17 in either the front or back state of the second frame 18. For this reason, when the number of filter media 19 stacked between both frames 17 and 18 decreases, the filter media with a small number of layers can be obtained by assembling the first frame 17 with the second frame 18 reversed. 19 can be stably laminated and held between the frames 17 and 18.

  (5) In this embodiment, a prevention structure is provided between the first frame 17 and the second frame 18 to prevent them from being assembled in an inclined state. That is, in this embodiment, guide members 24 </ b> A and 24 </ b> B that can slide in contact with the corresponding side edges of the second frame 18 in a state of equal contact with the four side edges of the first frame 17 are projected. Therefore, it is possible to prevent the first frame 17 and the second frame 18 from being assembled in an inclined state by the guiding action of the guide members 24A and 24B.

  (6) In this embodiment, a high-rigidity portion 20 is provided on the outer periphery of the filter medium 19. For this reason, the shape of the flat filter material 19 made of non-woven fabric or the like can be maintained without bending, and when the filter medium 19 is attached to or detached from the first frame 17 and the second frame 18, the attachment / detachment work is performed. Can be easily performed, and the filter media 19 can be prevented from being stacked in a state of being trapped or folded.

  (7) In this embodiment, holding portions 22 that press the filter medium 19 are formed at the four corners of the second frame 18 even when the second frame 18 is inverted. Therefore, the filter medium 19 can always be pressed against the first frame 17 side by the second frame 18, and the filter medium 19 can be stably used for air filtration.

(8) In this embodiment, since the whole filter medium 19 is comprised with the nonwoven fabric of 1 sheet, a structure is simple and manufacture is easy.
(Second Embodiment)
Next, a second embodiment of the air filter embodying the present invention will be described with a focus on differences from the first embodiment.

  In the second embodiment, as shown in FIGS. 7A and 7B, the guide members 24 </ b> A on the first frame 17 are formed on the inner surfaces corresponding to the engaging portions 26 </ b> A and 26 </ b> B of the second frame 18. , 24B is formed. When the first frame 17 and the second frame 18 are assembled, the guide members 24A and 24B are engaged with the engagement grooves 30, thereby preventing the frames 17 and 18 from being assembled in an inclined state. It is like that. Therefore, in the second embodiment, the guide members 24A and 24B and the engagement groove 30 constitute a prevention means for preventing the frames 17 and 18 from being assembled in an inclined state.

Therefore, according to the second embodiment, in addition to the effects described in (1) to (8) in the first embodiment, the following effects can be obtained.
(9) In this embodiment, since the engaging groove 30 that can be engaged with each guide member 24A, 24B is formed on the inner surface of the second frame 18, the first frame 17 and the second frame 18 are inclined. Assembling in a state can be more effectively prevented.

(Third embodiment)
Next, a description will be given of a third embodiment of an air filter embodying the present invention, centering on differences from the first embodiment.

  In the third embodiment, as shown in FIGS. 8A and 8B, the engaged portions 25A and 25B are arranged at the same arrangement pitch P on the guide members 24A and 24B on the first frame 17. So that they are at the same height. On the other hand, the engaging portions 26A arranged at the two opposite side edges of the second frame 18 and the engaging portions 26B arranged at the other two opposite side edges are engaged. The portions 25A and 25B are formed with their positions shifted in the arrangement direction by a half pitch P / 2 of the arrangement pitch P. Therefore, also in this configuration, as in the configuration of the first embodiment, the engagement of the engagement portion 26A with the engaged portion 25A and the engagement of the engagement portion 26B with the engaged portion 25B are alternately performed. As a result, the assembly position of the first frame 17 and the second frame 18 is changed by a half pitch P / 2 of the arrangement pitch P of the engaged portions 25A and 25B.

Therefore, also in the third embodiment, the same effects as those described in the first embodiment can be obtained.
(Example of change)
In addition, this embodiment can also be changed and embodied as follows.

  In the above-described embodiment, a plurality of types of non-woven fabrics having different fiber densities are prepared as the flat filter media 19, and the filter media 19 are stacked and arranged so that the fiber density becomes coarser as the filter media 19 on the upstream side of the air flow.

When comprised in this way, when the lamination | stacking number of filter media 19 decreases, a possibility that the filtration efficiency of the filter media 19 may be reduced can be suppressed.
In each of the above embodiments, among a plurality of stacked filter media 19, one filter media 19 placed in contact with the first frame 17 is attached to the first frame 17 with an adhesive or the like. To fix.

When comprised in this way, a possibility that an air cleaner may be used in the state by which all the filter media 19 was discarded and removed can be prevented.
In each of the above embodiments, the engagement structure 21 as the engagement means is changed to a different configuration. For example, claw-like protrusions are formed on the engaging portions 26A and 26B, and concave portions are formed on the guide members 24A and 24B.

  DESCRIPTION OF SYMBOLS 12 ... 1st case, 13 ... 2nd case, 16 ... Air filter, 17 ... 1st frame, 18 ... 2nd frame, 19 ... Filter medium, 20 ... High-rigidity part, 21 ... Engagement structure as engagement means, 23... Sealing part, 24A, 24B... Guide member constituting prevention means, 25A and 25B... Engaged part, 26A and 26B.

Claims (5)

A plurality of flat filter media are detachably held in a stacked state between the first frame and the second frame combined through the engagement means that detachably engages ,
A plurality of engaged portions arranged on the first frame along the stacking direction of the filter media, and the second frame so that the engaging means is detachably engaged with the engaged portions. An air filter characterized by comprising an engaging portion formed on the air filter. A seal portion attached in a sealed state to the case of the air cleaner is formed on the outer periphery of the first frame, and the engaging portion of the second frame is used as the engaged portion of the first frame in both the front and back sides of the second frame. The air filter according to claim 1 , wherein the air filter is formed in an engageable shape. The air filter according to claim 1 or 2 , wherein means for preventing the first frame and the second frame from being assembled in an inclined state is provided. The air filter according to any one of claims 1 to 3 , wherein a high-rigidity portion is provided on an outer periphery of the filter medium. It is composed of a first frame and a second frame that are detachably combined via engagement means so as to form an interval for holding the filter media in a stacked state,
A plurality of engaged portions arranged on the first frame along the stacking direction of the filter media, and the second frame so that the engaging means is detachably engaged with the engaged portions. A filter medium holder for an air filter, characterized in that it is configured by an engaging portion formed on the filter.

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