• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:

    公开号:SE1000398A1
    申请号:SE1000398
    申请日:2010-04-20
    公开日:2011-10-21
    发明作者:Andreas Soederholm；Ove Kaerrnaes
    申请人:Ultramare Ab；
    IPC主号:
    专利说明:

    The main object of the present invention is to provide a composite gas filter which is inexpensive, easy to produce, assemble and assemble. At the same time, it is important that the support frame is stable and that the filter pockets are firmly anchored in the frame. Another object has been to provide a gas filter comprising different types of materials which can be easily separated and then subsequently destroyed or recycled.
    SUMMARY OF THE INVENTION The present invention relates to a gas filter comprising a support frame and a number of filter pockets, said support frame comprising a first subframe and a second subframe connected to each other by at least one locking element, said first and second subframes constituting the inner wall, front and outer wall of the support frame. they are interconnected, each filter pocket having an opening for air inflow at one end bounded by opposite sides each having an edge. The filter pockets are tightly connected to each other by means of at least one coupling means which bridges and extends along substantially the entire length of the edges of two adjacent filter pockets. The at least one means for coupling has two opposite end portions, each end portion extending through notches in the inner wall of the first subframe and resting in slots arranged on the second subframe.
    The support frame in the invention is square or rectangular and the first and second subframes are each formed in one piece.
    The gaps in the second subframe can be V-shaped.
    The coupling means may be an elongate clamping strip and the top of the coupling means facing the air flow has a rounded shape.
    The means for coupling can be connected to the filter bags by spot welding or gluing.
    The filter bags, when tightly anchored by the means for coupling, have a peripheral upper edge and said peripheral upper edge can be fixed to the second subframe by means of hooking means.
    The peripheral upper edge can be further anchored to the support frame by means of a partition wall on the first subframe which presses the peripheral upper edge down into a groove arranged on the second subframe.
    Two peripheral sides of the support frame are provided with notches and gaps.
    Four peripheral sides of the support frame are provided with notches and gaps.
    The number of gaps and notches arranged on transverse sides of the support frame is not the same number of gaps and notches arranged on the longitudinal sides. BRIEF DESCRIPTION OF THE DRAWINGS Figure 1 is an overview view of a composite gas filter according to the invention in which the locking elements are shown in detail in the inset images.
    Figure 2 is a schematic exploded view showing the first and second subframes and the composite pocket filters in the gas filter.
    Figure 3 is a schematic partial view of the pocket filter assembly.
    Figure 4 is a schematic cross-sectional view of the coupling means arranged in a gap on the sloping upper side of the second subframe.
    Figure 5 is a schematic cross-sectional view of the first and second subframes when attached to each other by means of the locking elements.
    Figure 6 is a schematic overview view showing the fitting of the first subframe to the second subframe.
    DETAILED DESCRIPTION OF PREFERRED EMBODIMENTS Figure 1 illustrates a composite gas filter 100 according to the invention, said filter comprising a support frame 101 having a square or rectangular configuration and a number of filter pockets 102 attached thereto. The gas filter in the invention is designed as a cassette filter that can be inserted into a ventilation unit intended for use in removing pollutants such as solid particles and gaseous pollutants from an air flow.
    The support frame 101 in the invention consists of a first subframe 203 and a corresponding second subframe 204 (see Fig. 2) which when connected to each other by means of at least one locking element 105, 106 form four peripheral sides 107, 108, two elongate sides 107 placed opposite each other and two transverse sides 108 opposite each other. If the support frame 101 has a square design, the four peripheral sides will be of the same length. However, if the support frame has a rectangular design, the two elongate sides 107 will generally be longer than the two transverse sides 108. The following description including the figures will describe a rectangular support frame, but it is obvious that the same description applies to a support frame with four peripheral sides with the same length instead of the two transverse and two longitudinal sides referred to in the text.
    When interconnected, the first subframe 203 forms the inner wall 110, the first side (i.e., the side facing the air gap), and portions of the outer wall 111 of the support frame.
    The second subframe 204 forms a rear side (i.e., the side downstream of the air flow) and the main portion of the outer wall 112 of the support frame 101. Each subframe 203, 204 is preferably made by injection molding technique and is formed in one piece in a pg18210se00 4 destructible and / or recyclable materials known in the art. Advantageously, the subframes are manufactured as whole pieces in contrast to frames where the sides are assembled by means of coupling corner parts which are often used in known technology. Subframes made in one piece provide better stability.
    The first and second subframes 203, 204 each have an inner cross-sectional profile designed so that they have a cooperating fit when connected by means of locking elements 105, 106 (see inset pictures in figure 1). The shape and function of the inner profiles of the subframes 203, 204 will be described in more detail later.
    The gas filter is especially intended for filtering air and other gases. Each filter bag 102 is made of filter medium which is known per se (eg glass or synthetic fiber), and can be manufactured in any of the ways known in the art. A preferred manufacturing method is when two identical pieces of filter medium having a square or rectangular shape are arranged on top of each other and joined together, preferably by sewing, welding or gluing along three of the sides, leaving one side open to form the air intake opening 113 on the filter pocket 102. Alternatively a rectangular piece of filter medium is folded at half of the midpoints on the long sides of the rectangle and the two sides next to the fold are sewn, welded or glued together, leaving the side opposite the fold open to form the air intake opening 113. The air intake opening 113 is defined by the first and second upper edges 114, 115, respectively. on the filter medium.
    Two or more filter pockets 3022 302 ”are tightly connected to each other by means of a coupling means 316, preferably in the form of elongate clamping strips which extend separately and substantially parallel to each other between the longitudinal sides 107 of the support frame 101 (see Fig. 3). The means for coupling 316 is preferably made by extrusion or injection molding of a polymeric material such as, for example, a plastic material of the group comprising polypropylene and polyethylene. The means for coupling 316 may have any cross-section that meets the requirements discussed below.
    However, the general cross-section shown in Fig. 4 has several advantages. The means for coupling 316 fulfills several purposes, wherein the main purpose is to anchor the filter pockets 302 ", 302" to each other in a dust-free manner. This means that no air, whether it contains dust particles or not, will be able to pass between the pockets but will pass through the filter medium. Another purpose is to support the filter pockets and prevent them from collapsing in strong airflow. Preferably, the upper part of the means for coupling 416, i.e. the upper side facing the airflow (the airflow is marked with an arrow in Fig. 4), a rounded shape which allows the means for coupling 416 to be made of a lighter and thinner material while still being able to withstand bending or wrinkling in strong 10 15 20 25 30 35 pg18210se00 5 drag. Another advantage of the rounded shape is that the pressure drop created at the air intakes 313 is lower with this special round design.
    Each coupling means 316 connects two adjacent filter pockets 302 'and 302 "by bridging the first upper edge 314' of a first filter pocket 302 'and the second upper edge 315" of an adjacent second filter pocket 302 ", to form a tight As can be seen in Figure 4, the lower part of the means for coupling 416 is narrower so that the two sides of the strip clamp the two upper edges 414 ', 415 "on the sides of two adjacent filter pockets together. The means for coupling 316 is further anchored to the filter pockets by, for example, spot welding or gluing 317. A desired number of filter pockets 302 can be connected by means of the means for coupling 316 in the manner described above, to create a composite bag filter 318.
    The means for coupling 316 has two opposite end portions 319, and in the collapsed state (not shown), i.e. when the composite filter pockets are not mounted in the support frame, the upper edges 314x ', 315x "of the filter pockets 302', 302" extend beyond the two end portions 319 of the means for coupling 316. This means that the means for coupling 316 are shorter than the length of the upper edges 314, 315 of a filter passage 302. The reason for this will be described below.
    The inner cross-sectional profile of the second subframe 504 (i.e., the side facing the inside of the first subframe 503, see Fig. 5) has a sloping upper side 520 sloping diagonally from the outer edge of the front 509 toward the lower inner wall 510 of the support frame. 501 (see Fig. 5). When the diagonally sloping upper side 521 reaches the inner wall 510, it bends to form a vertical wall 521 which runs parallel to, and thus forms an overlapping area 522 with the inner wall 510 on the first subframe 503. The sloping upper sides 220 on the two longitudinal sides 207 are provided with a number of slots 223 distributed at a distance from each other equal to the width of a filter fi cka 202 in the fully developed state, which is also the same as the distance between two adjacent means for coupling 216 on the composite bag filter 218. The number of slots 223 is equal to the number of means for coupling 216 in the composite bag filter 218. When mounted in the support frame 101, each end portion 219 extends on the means for coupling 216 in the composite bag filter 218 through notches 224 provided in the two opposite inner walls 210 on the longitudinal sides 207 of the first subframe 203 and rest in the slots 223 in the inner cross-sectional profile of the second subframe. The recesses 224 in the inner walls 210 of the front subframe are aligned with the slots 223 on the second subframe 204 and are the same number as the number of means for coupling 216 in the composite bag filter 218. 10 15 20 25 30 35 pgts21oseoo 6 As pointed out above, in the coincident state, the total length of the means for coupling 316 is shorter than the length of the upper edges 314, 315 of the filter pockets 302, and the filter medium upper edges 314x, 315x extend beyond each end portion 319 of the means for coupling 316. however, the upper edge 314x 'of the filter pocket material belonging to the filter pocket 302' on the left is folded to the left at each end portion 319 of the means for coupling 316, and the upper edge 315x "of the filter pocket material belonging to the right side filter pocket 302" is folded to the right , which can be seen in Fig. 3. The shape of the slots 423 is generally square or U-shaped and has a width and a depth so they fit the cross section of the means for coupling g 416 including the filter material belonging to the upper edges of the filter pockets 314x ', 315x "on two adjacent filter pockets 402', 402" (see Fig. 4). In a preferred embodiment of the invention, the slots 223 on the second subframe have a V-shape for anchoring each end 219 of the means for coupling 216 in a clamping grip when the strips are placed in the slots 223.
    When the end portions 219 of each means for coupling 216 in a composite pocket filter 218 are mounted in their slots 223 on the second subframe 204, each filter pocket 202 between two means for coupling 216 opens up to form a generally rectangular air intake opening 213. The air intake opening 313 is defined in the transverse direction of the support frame by two parallel means for coupling 316, and in the longitudinal direction (i.e. the short ends of the filter pockets), by the upper edges 314x "and 315x" on the two pieces of filter medium extending past the end portions 319 of the means for coupling 316. The outermost filter pockets on each side of the composite filter 218 are connected to only one adjacent filter pocket, leaving the outermost upper edges 214 ', 215 "of the filter pockets 202', 202" facing the transverse sides 208 of the other subframe 204 loose.
    In order to be able to anchor the outermost upper edges 214 ', 215 "on the outermost filter pockets 2022 202", the diagonally sloping sides 220 on the transverse sides 208 of the second subframe are provided with a number of hooking elements 225, on which the upper edges 214' of the filter medium 215 "can be hooked on or attached. The areas between the slots 423 on the diagonally sloping upper side 420 on the longitudinal sides 207 of the rear frame are also preferably provided with hooking elements 425, on which the upper edges of the filter pockets 402 ', 402" short ends 414x' , 415x "can be attached (see Fig. 4). By means of said hooking elements 225 provided along the diagonally sloping upper side 220 on both the longitudinal and transverse sides 207, 208 of the second subframe 204, the whole peripheral upper the edge 226 (ie the upper edges 214 ', 215 "of the outermost filter pockets and the short ends 214x, 215x of all filter pockets) of the composite bag filter 218 are attached to the diago sloping upper sides 220 of the second subframe 204.
    As can be seen in Fig. 5, the inner profile of the first subframe 503 is generally U-shaped in which a first leg of the U forms the inner wall 510 of the support frame 501 and the second leg shorter than the first forms the the upper portion of the outer wall 511. To further anchor the peripheral upper edge 526 of the filter media on the composite bag filter 218, the inner profile of the first subframe 503 is provided with a partition 527 extending downwardly from the inside of the front face 509 toward the diagonally sloping upper side. 520 on the second subframe 503 and parallel along the entire inner wall 510 of the first subframe 503. The lower edge 528 of the partition 527 extends into a notch 529 located behind the hook members 525 on the diagonally sloping upper side 520 of the the second subframe 503. When the first 503 and the second 504 subframe are assembled, the lower edge 528 of the partition 527 presses the entire peripheral upper edge 528 of the filter medium hooked onto the hooking members. a 525, down into the groove 529, and thus the composite bag filter is anchored to the support frame in a dust-free manner.
    The composite bag filter is further anchored to the support frame by mounting the first subframe 603 on the second subframe 604 having the entire peripheral edge 526 of the composite bag filter attached to its hooking elements 625 (see Fig. 6). The notches 624 on the longitudinal sides 607 of the first subframe 604 are aligned to fit over the means for coupling 616 on the composite bag filter, and the first subframe 603 is anchored to the second subframe 604 by means of locking elements 105, 106 located on the outer 111 and inner 110 the walls of the support frame 101. Furthermore, as can be seen in Figure 5, the entire peripheral upper edge 526 of the filter medium is anchored to the support frame by means of the partition 527 which presses the filter medium down into the groove 529. With this design, the entire upper edge 526 on the filter pockets and end portions 219 of the coupling means 216 securely anchored to the support frame 101 and will not be easily detached or come loose. The main function of the locking elements 105, 106 is therefore only to connect the first 203 and second 204 subframes. Thus, it will be apparent to those skilled in the art that the design of the locking elements is not critical in the present invention as long as they meet the requirement to secure the two subframes 203, 204 to each other. However, a preferred design will now be described.
    As mentioned above, the first subframe 503 covers both parts of the outer wall 511 and the front side 509 and the inner wall 510 of the support frame 501. This can be seen in Fig. 5 where the first subframe 503 extends from the inner wall 510, over the front side 509 and partially overlaps the outer wall 511 of the second subframe 504. This overlapping area 530 is edged by a ledge 531 formed in the outer wall 512 of the second subframe 504 on which the edge 532 of the outer subframe 511 of the first subframe rests. A number of reading elements on the outer wall 106 are distributed in the overlapping area 530 around the entire circumference of the outer wall 111. Each outer wall reading member 106 includes an outer wall locking protrusion 533 on the overlapping area of the second subframe 504, and an outer wall cooperating lock hole 534 disposed on the overlapping area 530 of the first subframe.
    A number of inner wall locking elements 105 are distributed along the circumference of the inner wall. Each reading element on the inner wall 105 comprises an inner wall locking projection 535 in the overlapping area 522 of the vertical wall 521, and a cooperating locking hole 536 on the overlapping area 522 of the first subframe.
    The operation and design of the preferred locking elements 105, 106 described above are similar, although they are located on different walls of the support frame 101. The cooperating locking heels 534, 536 of the locking elements 105, 106 are both continuous in the inner part of the first subframe. 510 and outer walls 512, respectively, and has a lower flat support shelf 537, 538 on which flat support surfaces 539, 540 on respective locking projections 533, 535 are adapted to cooperate with said lower flat support shelves 537, 538 when the front and rear subframes 203, 204 are locked together.
    In a preferred embodiment of the invention, all four peripheral sides 107, 108 of the support frame are designed to receive end portions 219 of the means for coupling 216. The four peripheral sides may have the same number of slots / notches on all sides. However, in a more preferred embodiment, the number of slots / notches provided on the transverse sides 108 is not the same as the number of slots / notches provided on the longitudinal sides 107 (not shown). This feature makes the support frame 101 more flexible because it can be arranged to hold bag filter assemblies having different numbers of filter pockets. For example, the support frame may hold a composite bag filter comprising 8 filter pockets if the filter pocket openings in its longitudinal direction extend between the longitudinal sides 107 of the support frame, while it may hold a composite bag filter comprising 6 filter pockets if the pocket filter openings in its longitudinal direction extend between the transverse sides 108 on the support frame. Those skilled in the art will appreciate that the number of filter pockets as well as slits / notches arranged on the transverse and longitudinal sides of the support frame may vary according to various standards in the technical field of composite gas filters and may also be applied to support frames having a square design. As will be apparent to those skilled in the art, a composite gas filter according to the invention can be assembled in a quick and easy manner as can be seen in Figure 2. Advantageously, the means for coupling 216 connects two adjacent filter pockets 302 'and 302 "through bridging the first upper edge 314 'of a first filter pocket 302' and the second upper edge 315 'of an adjacent second filter pocket 302 ", to form a tight seal between the two filter pockets. The means for coupling 216 is preferably further anchored to the filter pockets by spot welding or gluing 317. A desired number of filter pockets may be assembled to form a composite bag filter 218.
    The composite bag filter 218 is then mounted in the second subframe 204 by fitting each end portion 219 of the coupling means 216 in the slots 223 of the second subframe 204. Thereafter, the entire peripheral upper edge 226 (i.e., the upper edges 214 ', 215) is hooked. "On the outermost filter pockets and short sides 214x, 215x on all filter pockets) on the composite bag filter 218 on the hooking elements 225 arranged on the diagonally sloping upper sides 220 of the second subframe 204.
    Finally, the first subframe 203 is mounted on the second subframe 204 and the composite bag filter 218, by aligning the notches 224 on the inner walls 210 of the first subframe with the slots 223 on the second subframe 204 and the clamping strips 216 on the composite bag filter 218 located therein. The locking elements 205, 206 of the inner and outer walls are closed and thus the lower edge 528 of the partition 527 presses the entire peripheral upper edge 226 of all filter pockets down into the notch 529 located behind the hooking elements 225 of the diagonally sloping upper side 220 of the second subframe 203, and in this way anchor the composite filter 218 to the support frame in a dust-free manner.
    From the description above, it can be concluded that the composite gas filter of the present invention is easy to produce, assemble and assemble. Furthermore, due to its construction with the means for coupling and the entire peripheral upper edge of the filter pockets firmly anchored between the first and second subframes, a stable and dust-free tight closure of the composite filter is provided which is not easily detached even in strong draft.
    权利要求:
    Claims (1)
    [1]
    A gas filter (100) comprising a support frame (101) and a plurality of filter pockets (102), said support frame (100) comprising a first subframe (203) and a second subframe (204). connected to each other by means of at least one locking element (105, 106), said first (203) and second (204) subframes constitute the inner wall (110), the front (109) and the outer wall (111) of the support frame when connected, each filter pocket has an inflow opening (113) at one end bounded by opposite sides each having an edge (114, 115); characterized in that the filter pockets (102) are tightly connected to each other by means of at least one means for coupling (216) which bridges and extends along substantially the entire length of the edges (214, 215) of two adjacent filter pockets (202), said at least one means for coupling (216) has two opposite end portions (219), each end portion (219) extending through notches (224) in the inner wall (210) of the first subframe (203) and resting in slots (223) arranged on the second subframe ( 204). A gas filter (100) according to claim 1, wherein the support frame (101) is square or rectangular. A gas filter (100) according to claim 1, wherein the first subframe (203) and the second subframe (204) are each formed in one piece. A gas filter (100) according to claim 1, wherein the slots (223) in the second subframe (204) are V-shaped. A gas filter (100) according to claim 1, wherein the means for coupling (316) is an extended clamping strip (316). A gas filter (100) according to claim 1, wherein the upper side of the means for coupling (316) facing the air flow has a rounded shape. A gas filter (100) according to claim 1, wherein the means for coupling (316) is coupled to the filter passages by spot welding or gluing (317). A gas filter (100) according to claim 1, wherein the filter bags (202) when tightly anchored by the means for coupling (216) have a peripheral upper edge (526) and said peripheral upper edge (526) is attached to the second subframe (204) by means of hooks (225). A gas filter (100) according to claim 8, wherein the peripheral upper edge (526) is anchored to the support frame (101) by means of a partition (527) on the first subframe (203) which presses the peripheral upper edge (526) down into a cutter (529) mounted on the second subframe (504). A gas filter (100) according to claim 1, wherein two peripheral sides of the support frame are provided with notches (224) and slots (223). A gas filter (100) according to claim 1, wherein four peripheral sides of the support frame are provided with notches (224) and slots (223). A gas filter (100) according to claim 1, wherein the number of slots (223) and notches (224) provided on transverse sides (108) of the support frame (101) is not equal to the number of slots (223) and notches (224) provided on the longitudinal pages (107).
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    法律状态:
    优先权:
    申请号 | 申请日 | 专利标题
    SE1003986|2010-04-20|
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