초록 ▼

Disclosed herein is a filter device for reducing automobile exhaust fume. The filter device includes a case, a front flange mounted inside the case, a rear flange mounted inside the case, and a filter member mounted between the front and rear flanged. The case includes an inlet port, a porous tube a

Disclosed herein is a filter device for reducing automobile exhaust fume. The filter device includes a case, a front flange mounted inside the case, a rear flange mounted inside the case, and a filter member mounted between the front and rear flanged. The case includes an inlet port, a porous tube and an exhaust port. The filter member includes a laminated-type or rolled-up type metallic foam filter mounted between the front and rear flanges, and a jacket wrapped around the metallic foam filter. The exhaust gas that flows inside the porous tube passes through the metallic foam filter. The jacket is formed in a network form to maintain the shape of the metallic foam filter and provide durability thereto. The jacket is formed with a rectangular vent hole. The jacket holds the metallic foam filter such that the shape, construction and position of the metallic foam filter can be maintained.

대표청구항 ▼

1. A filter device for reducing automobile exhaust fume, the filter device comprising: a case including an inlet port, a porous tube and an exhaust port, a combusted exhaust gas flowing into the porous tube having a pipe shape from an engine, the porous tube being formed with a plurality of vent hol

1. A filter device for reducing automobile exhaust fume, the filter device comprising: a case including an inlet port, a porous tube and an exhaust port, a combusted exhaust gas flowing into the porous tube having a pipe shape from an engine, the porous tube being formed with a plurality of vent holes through which the exhaust gas is discharged after passing through a metallic foam filter in such a way as to obtain a maximum flow area and simultaneously minimize vibration and deformation by an external force, the exhaust gas being discharged through the exhaust port after passing through the porous tube and a flow passageway;a front flange mounted inside the case, the front flange being vertically fixed to the metallic foam filter wrapping around the porous tube to hold the porous tube and prevent the metallic foam filter from being pushed towards the front end, the front flange being welded with the porous tube at the side of the inlet port such that the front flange and the porous tube at the side of the inlet port are in parallel to each other, thereby propagating the welding heat in the lengthwise of the porous tube at the side of the inlet port, the deformation due to heat transfer being limited to the direction vertical to the flange plane to thereby minimize thermal deformation of the flange plane;a rear flange mounted inside the case, the rear flange being vertically fixed to the rear end of the metallic foam filter wrapping around the porous tube to thereby hold the porous tube and prevent the metallic foam filter from being pushed toward the rear end, the rear flange being formed with small and large grooves protruding on the surface of the rear flange in order to easily position the position of the porous tube by the protruded grooves when fastened with the porous tube at the side of the inlet port, the rear flange being formed with a serrated groove in such a way as to reduce deformation due to a high temperature heat generated when the rear flange is welded to the porous tube at the side of the inlet port, thereby maintaining the evenness of the surface of the rear flange; anda filter member including a laminated-type or rolled-up type metallic foam filter mounted between the front and rear flanges, and a jacket wrapped around the metallic foam filter, the exhaust gas that flows inside the porous tube passing through the metallic foam filter, the jacket wrapping around the metallic foam filter being formed in a network form to maintain the shape of the metallic foam filter and provide durability thereto, the jacket being formed with a rectangular vent hole and wrapping around and holding the metallic foam filter such that the shape, construction and position of the metallic foam filter can be maintained against an expanding force of the foam filter while securing a flow area,wherein the jacket is perforated in a square shape using a press die, and thereafter wrapped around the filter in such a way as to cover it, the remaining area except for the hole is bent and a curring and folding are performed to fix it, or a welding is performed to fix it, thereby obtaining a maximum flow area. 2. The filter device according to claim 1, further comprising one or more partitions formed inside the case, the one or more partitions changing the flow line of the exhaust gas such that the exhaust gas in-flown through the inlet port passes through the metallic foam filter and then is discharged through the exhaust port. 3. The filter device according to claim 1, wherein the front flange and the rear flange suppress and prevent a clearance between the metallic foam filter and the case, the case and the front flange or the rear flange, the front flange or the rear flange and the porous tube, and a welding plane of the front flange and the rear flange near a welding portion with the case is bent vertically to the front or rear flange plane so that the front flange or the rear flange can be easily assembled with the case and thermal deformation due to the welding can be deduced. 4. The filter device according to claim 1, wherein the serrated groove is placed in the inner side of rear flange and wherein the serrated groove prevents a clearance between the metallic foam filter and the case, the case and the front or rear flange, and the front or rear flange and the porous tube, which may be caused by thermal deformation. 5. The filter device according to claim 1 or 2, wherein the flow passageway includes an outward type and an inward type, wherein in the outward type, the exhaust gas flows into the filter member and is discharged to the outside after passing through the filter member and then turned into the inside thereof again, and in the inward type, the exhaust gas flows from outside of the filter member into inside of the filter member via the filter member, again to the outside of the filter member and then again to the inside of the filter member. 6. The filter device according to claim 2, wherein the filter member is divided into plural filter regions by means of the partitions, each of which is treated with various catalysts and installed in the filter member, thereby enabling to remove various gases included in the exhaust gas.