JP2005052740A - Air filter - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an air filter which can be used stably over a long period of time and the filter medium of which can be exchanged easily. <P>SOLUTION: The corrugated plate-like filter medium 2 is fit to the inner periphery of a rectangular frame-like filter body 1 so that the medium 2 is attached/detached. The filter medium 2 is supported by a wire net-made rear face holding member 3 fixed to the inner periphery of the air outlet side of the filter body 1 and a wire net-made front face holding member 4 fixed to a front frame 5 fit in an attachable and detachable manner to the inner periphery of the air inlet side of the filter body 1. As a result, the disengagement of the filter medium 2 from the filter body 1 can be prevented, and this air filter can be used stably over a long period of time. When the filter medium 2 is exchanged, the exchange work can be performed easily since it is not necessary to separate/fix the filter medium 2 from/to the holding members 3 and 4. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to an air filter in which a corrugated plate-like filter material is fitted on the inner periphery of a frame member.

  In general, an air filter widely used in an air conditioner, a dust collector, or the like is often used in which a filter medium is attached to the inner periphery of a frame member installed so as to surround an air passage. In such an air filter, the filter medium is often detachably fitted to the frame member in order to facilitate removal and attachment when the filter medium is replaced or regenerated.

  On the other hand, some of the above-described air filters have filter media formed in a corrugated plate shape so that the dust collection ability can be maintained for a long time. However, in this long-life type air filter, since the filter medium is used for a long time, the filter medium may come off the frame member due to wind pressure or vibration during use, and the outside air may leak to the outlet side without being filtered. .

In contrast, if the filter medium is held by a holding member (reinforcing material) formed in a corrugated plate shape that conforms to its shape, the filter medium is prevented from coming off from the frame member, and the leakage of outside air is eliminated. (For example, refer to Patent Document 1).
JP 2002-66242 A

  However, in the air filter described in Patent Document 1, the filter medium and the holding member are fixed at both ends in the longitudinal direction by crimping, crimping, or the like, and the outer peripheral end portion is fitted into a concave groove provided on the inner surface of the frame member. Therefore, when replacing the filter media after use with a new or recycled product, the filter media removed from the frame member and the holding member are separated, and the new or regenerated filter media is fixed to the holding member again. It is necessary to fit in the frame member, which is very troublesome.

  Accordingly, an object of the present invention is to provide an air filter that can be used stably for a long period of time and in which a filter medium can be easily replaced.

  In order to solve the above-described problems, the present invention provides an air filter in which a corrugated plate-like filter medium is detachably fitted to an inner periphery of a frame member installed so as to surround an air passage. On the inner periphery on the air outlet side, a configuration was adopted in which a rear surface holding member formed in a corrugated plate shape along the rear surface shape of the filter medium and having a large number of holes through which air passes was fixed and attached.

  That is, by fixing the rear surface holding member that holds the corrugated plate-shaped filter medium from the rear surface side to the frame member, the filter medium is prevented from being detached from the frame member during use. Only the material can be easily removed and attached, so that it is not necessary to separate the used filter material from the rear surface holding member and to fix the new or recycled filter material to the rear surface holding member.

  Further, the filter medium is detachably fitted to the inner periphery of the frame member on the air inlet side, and is formed in a corrugated plate shape along the front surface shape of the filter medium, and has a large number of holes through which air passes. The filter medium can be prevented from coming off more reliably by holding the filter medium from the front surface side with little increase in labor at the time of replacement.

  As described above, the air filter according to the present invention is such that the rear surface holding member that holds the corrugated plate-shaped filter material from the rear surface side is fixed to the frame member. Can be used stably for a long period of time. Therefore, a filter medium having low rigidity or a material whose rigidity has been reduced by a regeneration process such as washing with water can be used with confidence. Moreover, when exchanging the filter medium, separation and fixing of the filter medium and the rear surface holding member are unnecessary, and the operation can be performed very easily.

  Further, by detachably fitting the front holding member that holds the filter medium from the front side to the frame member, it is possible to more reliably prevent the filter medium from coming off with almost no increase in the time for replacing the filter medium. At the same time, the front holding member serves as a coarse filter, and the use period of the filter medium can be extended.

  Hereinafter, an embodiment of the present invention will be described with reference to FIGS. As shown in FIG. 1, this air filter includes a rectangular frame-shaped main body 1 as a frame member installed so as to surround an air passage, and a corrugated plate-shaped filter medium 2 fitted into the inner periphery of the main body 1. , Fixed to the inner periphery of the main body 1 on the air outlet side, and fitted to the rear surface holding member 3 that holds the filter medium 2 from the rear surface side, and the inner periphery of the main body 1 on the air inlet side, and holds the filter medium 2 from the front surface side. And a rectangular front frame 5 to which a front holding member 4 is attached.

  The main body 1 and the front frame 5 are formed by bending a stainless steel plate, and the filter medium 2 is formed of a nonwoven fabric or fibrous activated carbon. In addition, as a raw material of the main body 1 or the front frame 5, a galvanized steel plate, an aluminum plate, etc. can also be used.

  Each of the holding members 3 and 4 is formed by forming a metal mesh made of stainless steel into a corrugated plate shape along the rear surface shape or the front surface shape of the filter medium 2. In addition, the material of each holding member 3 and 4 should just be what can be formed in a corrugated-plate shape, and has many holes which let air pass, for example, the perforation which opened many punch holes in the stainless steel plate other than a metal mesh, for example A board etc. can be used.

  As shown in FIG. 2, the filter medium 2 is inserted into a gap between the stepped locking portion 6 welded to the inner surface of the side portion of the main body 1 and the side portion of the main body 1, The main body 1 is detachably fitted on the inner periphery.

  On the other hand, the rear surface holding member 3 has both side edges fixed to the engaging portion 6 on the side of the main body 1 by welding, and a position that becomes a valley toward the filter medium 2 is erected on the inner periphery of the main body 1. Are reinforced by a plurality of stainless steel reinforcing bars 7. Similarly, the front holding member 4 is also a stainless steel reinforcement in which both side edge portions are welded and fixed to the side of the front frame 5, and a position that becomes a valley toward the filter medium 2 is erected on the inner periphery of the front frame 5. It is reinforced by a rod 7. Note that the number and position of the reinforcing bars 7 that reinforce the holding members 3 and 4 can be appropriately set based on the width of the air filter and the like. Further, each reinforcing rod 7 does not necessarily have to be solid, and a pipe-shaped member or the like can also be used.

  Then, the filter medium 2 is sandwiched and held between the holding members 3 and 4 by fitting the front frame 5 integrally with the front holding member 4 into the inner periphery of the main body 1 and fixing it.

  As shown in FIG. 3, the front frame 5 is fixed to the main body 1 with hooks 9 provided on the upper and lower surfaces of the inner periphery of the main body 1 with mounting brackets 9 fixed to the upper and lower edges of the front frame 5 with rivets 8. A set screw 11 is screwed in from the outer peripheral side of the main body 1. In addition, although fixation with these metal fittings 9 and 10 is performed at four places so that FIG. 1 may show, you may increase / decrease the number of fixing parts suitably based on the width | variety etc. of an air filter.

  The mounting bracket 9 has a set screw 11 passed through a slit 9a at the center thereof, so that the fixing position of the front frame 5 can be adjusted in the front-rear direction. Therefore, when the thickness of the filter medium 2 is smaller than that of the example shown in FIGS. 1 to 3, the front frame 5 is fixed at the position pushed into the back of the main body 1 (see FIG. 4). If it is thicker than the example of FIGS. 1 to 3, the front frame 5 is fixed at a position protruding from the inlet of the main body 1 (not shown), and the filter medium 2 is securely attached by both holding members 3 and 4 regardless of the thickness. Can be held between.

  This air filter has the above-described configuration, and since the filter medium 2 is held from both sides, the filter medium 2 is not likely to come off during use, and can be used stably for a long period of time. The front holding member 4 also serves as a coarse filter that removes insects and the like in the outside air before the filter medium 2, and can extend the use period of the filter medium 2.

  Moreover, when the filter medium 2 is replaced, the set screw 11 is loosened, the front frame 5 is pulled out from the main body 1, the used filter medium 2 is removed, and a new or regenerated filter medium 2 is set in the main body 1. After that, it is only necessary to fit the front frame 5 into the main body 1 and fix it with the set screw 11. Therefore, it is not necessary to separate and fix the filter medium and the holding member as in the conventional air filter described above, and the replacement work does not take time. In addition, when the entire air filter is discarded, the filter medium 2 and other metal parts can be easily separated, so that the metal parts can be easily reused.

  In the above-described embodiment, the front frame to which the front holding member is attached is fitted into the main body and fixed with a set screw, but at least the front holding member only needs to be detachably fitted to the main body, so the front frame is attached to the main body. The front holding member may be directly fitted into the main body without providing the front frame.

  Further, depending on the use environment or the like, the front holding member may not be provided. In that case, the front frame and the metal fitting on the main body side for fixing the front frame are not required, the manufacturing cost is reduced, and the filter medium can be replaced very easily.

The exploded perspective view of the air filter of an embodiment 1 is a cross-sectional plan view of the air filter of FIG. Sectional view along line III-III in Fig. 2 FIG. 1 is a cross-sectional plan view showing a use state in which the front frame fixing position of the air filter of FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Main body 2 Filter material 3 Back surface holding member 4 Front surface holding member 5 Front frame 6 Locking part 7 Reinforcing bar 8 Rivet 9 Mounting bracket 9a Slit 10 Fixing bracket 11 Set screw

Claims (2)

  In an air filter in which a corrugated plate-like filter material is detachably fitted to the inner periphery of a frame member installed so as to surround the air passage, the filter material is attached to the inner periphery of the air outlet side of the frame member. An air filter characterized in that a rear surface holding member formed in a corrugated plate shape along a rear surface shape and having a large number of holes through which air passes is fixed and attached.   A front surface holding member, which is formed in a corrugated plate shape along the front surface shape of the filter medium and has a number of holes through which air passes, is detachably fitted on the inner periphery of the frame member on the air inlet side. Item 2. The air filter according to Item 1.

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