JP2010227797A - Chemical filter unit - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a chemical filter unit capable of suppressing pressure loss without deteriorating gas adsorption performance in the chemical filter unit in which filter panels are arranged into a V shape. <P>SOLUTION: The filter panels 21, 21 present the V shape by allowing portions 21A, 21A of one edge part to approach each other through a void 44. First and second L shaped members 71, 72 are fitted to corner parts 21E, 21E to which the filter panels 21, 21 get closer. The first and second L shaped members 71, 72 are composed of first cover part 51 with which parts of edge surfaces 21D, 21D of one edge parts 21A, 21A are covered, and first and second projection parts 61, 62 with which parts of one surfaces 21C, 21C facing each other are covered. A distance R between the tips 51B, 61B is coincident with a filter thickness T. The first and second L shaped members 71, 72 are adhered with an adhesive to block the void 44. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a chemical filter unit formed in a V shape by connecting a pair of chemical filter panels filled with an adsorbent in a breathable case.

  Conventionally, a chemical filter using an adsorbent such as activated carbon or ion exchange resin has been used for the purpose of removing acid gas, basic gas, organic gas, etc. in the air (see, for example, Patent Document 1). As an example of such a chemical filter, a chemical filter panel configured by filling an adsorbent in a plate-like case having air permeability is known.

  For the purpose of improving the effective area of the filter, for example, the chemical filter panel has a V shape so that one end portions of a pair of panels are brought close to each other and the other end portions are separated from each other. May be placed in the filter frame. A pair of filter panels exhibiting a V shape have one end arranged in one opening of the filter frame and the other end arranged in the other opening. In addition, a pressing plate that holds the both end surfaces is spanned over one opening to seal the gap between both end surfaces of one end and prevent the filter panel from falling outside the filter frame. Yes.

JP 2005-313144 A

  The holding plate is generally provided so as to cover the entire surface of both end faces. However, if the entire end face is covered with the holding plate, the opening area of the filter frame is reduced and the pressure loss in the air filter is increased. There's a problem. On the other hand, if only a part of both end faces are covered with a presser plate so that the pressure loss does not increase, air enters the filter panel from the end face. For this reason, the shortest path for ventilation becomes shorter than the panel thickness, which causes a problem that the gas adsorption removal performance of the filter is deteriorated.

  Then, this invention is made | formed in view of the above problem, and it aims at providing the chemical filter unit which can suppress a pressure loss, without reducing gas adsorption performance.

  The chemical filter unit according to the present invention is configured by filling each case with an adsorbent in a case having air permeability, one end portions are close to each other through a gap, and the other end portions are separated from each other into a V shape. A pair of filter panels disposed on opposite sides of each other, a first covering portion covering a part of an end surface of one end of the one filter panel, and one surface of one of the filter panels protruding from the first covering portion. A first member having a first protrusion covering the first part, a second covering part covering a part of the end face of one end of the other filter panel, and one surface of the other filter panel protruding from the second covering part. And a second member having a second projecting portion covering the portion, wherein the first and second members are connected so as to close the gap.

  The separation distance between the tip of the first covering portion and the tip of the first protrusion is equal to or greater than the thickness of one filter panel, and the separation distance between the tip of the second covering portion and the tip of the second protrusion is The thickness is preferably equal to or greater than the thickness of the other filter panel. More preferably, the separation distance between the tip of the first covering portion and the tip of the first protrusion is equal to the thickness of one filter panel, and the tip of the second cover and the tip of the second protrusion are between. The separation distance is equal to the thickness of the other filter panel. Moreover, the 1st and 2nd member is adhere | attached and connected by the adhesive agent, for example.

  When the first protruding portion protrudes from the base end of the first covering portion and these integrally form the first L-shaped member, the first L-shaped member is formed by the one surface and the end surface of one filter panel. It is preferable to fit in the formed corner. While the 2nd protrusion part protrudes from the base end of the 2nd covering part, these may be united and may constitute the 2nd L-shaped member. In this case, the second L-shaped member is fitted to a corner formed by the one surface and the end surface of the other filter panel, and the base end of the first covering portion is connected to the base end of the second covering portion. Preferably it is.

  The pair of filter panels is disposed, for example, inside a filter frame that is open at the front and rear. In this case, one end is disposed on one opening side of the filter frame, and the other end is disposed on the other opening side of the filter frame. The first and second members are preferably fixed to the filter frame. Specifically, the first and second members are provided so as to be spanned, for example, in one opening.

  In another aspect of the chemical filter unit according to the present invention, an adsorbent is filled in a case having air permeability, and each of the chemical filter units is configured such that one end portions are close to each other through a gap and the other end portions are separated from each other. A pair of filter panels arranged in a V-shape, a front covering portion that is provided over both end faces of one end portion of the pair of filter panels, covers a part of each end face and the gap, and passes through the gap from the front covering portion. And a side cover portion that protrudes so as to cover a part of each of the opposing surfaces of the pair of filter panels.

  In the present invention, even if the pressing portion covers only a part of the end face of the one end portion of the filter panel, the shortest path for ventilation is prevented from being shortened by the protrusion. Therefore, pressure loss can be suppressed without reducing the gas adsorption performance of the chemical filter unit.

It is a front view which shows an air filter. It is sectional drawing in the II-II line of FIG. It is a side view for showing the composition of a pressing part.

Hereinafter, an embodiment of the present invention will be described with reference to the drawings.
FIG. 1 is a front view of an air filter according to the present invention, and FIG. 2 is a cross-sectional view taken along the line II-II in FIG. FIG. 1 shows a state where the two pressing portions on the top frame portion side are removed. The air filter 10 includes a filter frame 11 and a chemical filter unit 20 disposed inside the filter frame 11.

  The filter frame 11 includes a plate-like top frame portion 12 and a ground frame portion 13 that face each other and are arranged in parallel, and plate-like both side frame portions 14 and 15 that face each other and are arranged in parallel. 12 to 15 form a square frame. The filter frame 11 is opened in the front-rear direction, and air is allowed to pass from the front opening 39A toward the rear opening 39B. In the following description, the direction in which the top frame portion 12 and the ground frame portion 13 face each other will be described as the top and bottom direction, and the direction in which the both side frame portions 14 and 15 face each other will be described as the left-right direction. The left-right direction is a direction orthogonal to the top-and-bottom direction.

  The chemical filter unit 20 includes a plurality of filter panels 21. Each filter panel 21 is configured by filling an adsorbent in a case 22 having air permeability. The case 22 (panel 21) has a rectangular plate shape in which the one surface 21C and the other surface 21S, which is the surface opposite to the one surface 21C, are parallel. The case 22 has air permeability by forming a large number of holes 23 (see FIG. 3) on the entire surface thereof by punching. The adsorbent inside the case 22 is, for example, activated carbon, zeolite, ion exchange resin, alumina, etc., and adsorbs gaseous impurities such as acid gas, basic gas, and organic gas.

  A plurality of filter panels 21 are arranged in the vertical direction, and one end portion (one end portion in the front-rear direction) 21A is disposed on the front opening 39A side, and the other end portion (the other end portion in the front-rear direction) 21B. Is arranged on the rear opening 39B side. In the front opening 39A, the one ends 21A and 21A of the two panels 21 and 21 adjacent in the top-to-bottom direction are close to or separated from each other. These one end portions 21 </ b> A and 21 </ b> A alternately repeat proximity and separation from the top frame portion 12 toward the ground frame portion 13. Similarly, in the rear opening 39B, the other end portions 21B and 21B of the two panels 21 and 21 adjacent in the top-to-bottom direction alternately repeat separation and proximity from the top frame portion 12 to the ground frame portion 13. Yes. Thus, as shown in FIG. 2, when viewed from the left frame 13 (or right frame 14) side, the two panels 21 and 21 adjacent in the vertical direction form a V shape, and the chemical filter unit 20 is V It has a zigzag shape with multiple shapes connected.

  A plurality of guide rails 16 are provided on the inner surfaces of the side frame portions 14 and 15 of the filter frame. Each guide rail 16 has a linear shape and is provided corresponding to the arrangement position of each filter panel 21. That is, a plurality of guide rails 16 are provided on the inner surfaces of the side frame portions 14 and 15, and the plurality of guide rails 16 are arranged in a zigzag shape on the inner surfaces of the side frame portions 14 and 15. Side edge portions 21F and 21G (both end portions in the left-right direction) of the filter panel 21 are slidably inserted into each guide rail 16, and the filter panel 21 is supported by the side frame portions 14 and 15. Each filter panel 21 can move back and forth along the guide rail 16 and can be taken in and out of the filter frame 11 from the front opening 39A or the rear opening 39B.

  Each of the front end portion and the rear end portion of the top frame portion 12 is bent and provided with rising portions 17A and 17B raised toward the ground frame portion 13. Each of the front end portion and the rear end portion of the ground frame portion 13 is bent and provided with rising portions 18A and 18B raised toward the top frame portion 12. L-shaped portions 19 and 19 having an L-shaped cross section that is long in the left-right direction are attached to the inner surfaces of the upright portions 17B and 18B, and the inner surfaces of the L-shaped portion 19 and the inner surfaces of the top frame portion 12 and the ground frame portion 13, respectively. Thus, grooves 25 and 25 are formed.

  In the chemical filter unit 20, the other end portions 21 </ b> B and 21 </ b> B of the filter panels 21 and 21 arranged closest to the top frame portion 12 side and the ground frame portion 13 side are not connected to other filter panels 21, and are not connected to the groove 25. 25, and is connected to the top frame portion 12 and the ground frame portion 13.

  A plurality of pressing portions 31 extending in the left-right direction are disposed in the front opening 39A. The holding parts 31 are arranged at equal intervals in the top-and-bottom direction in the front opening 39A. Similarly, a plurality of pressing portions 32 extending in the left-right direction are disposed in the rear opening 39B. The pressing portions 32 are arranged at equal intervals in the top-bottom direction in the rear opening 39B. The holding parts 31 and 32 are fixed to the both side frame parts 14 and 15 by screws or the like at both ends in the longitudinal direction (for example, both ends of covering parts 51 and 52 described later). It is provided so as to be spanned between them.

  The pressing portion 31 is disposed so as to press the two end surfaces 21D and 21D of the two adjacent one end portions 21A and 21A in the front opening 39A. The pressing portion 32 is disposed so as to press the both end surfaces 21H and 21H of the two other end portions 21B and 21B adjacent to each other in the rear opening 39B. The holding portions 31 and 32 prevent the filter panel 20 from falling off the filter frame 11. Moreover, while preventing air from passing through the space | gap 44 (refer FIG. 3) between one end part 21A and 21A or the other end part 21B and 21B, from both end surfaces 21D and 21D or a part of both end surfaces 21H and 21H. Air is prevented from entering the filter panel 21.

  FIG. 3 is a side view showing a pair of filter panels 21 and 21 in which one end portions 21A and 21A are close to each other and have a V shape. Next, the pressing portion will be described in more detail with reference to FIG. In addition, in this embodiment, although the structure of the one pressing part 31 provided in the front opening part 39A side is demonstrated, since the structure of the other pressing parts 31 and 32 is also the same, the description is abbreviate | omitted.

  As shown in FIG. 3, as for a pair of filter panels 21 and 21, those one surfaces 21C and 21C are facing each other. Further, the corners 21E and 21E of the panel, which are connecting portions of the one surface 21C and the end surface 21D of the one end portion 21A, are close to each other through the gap 44, and the one surface 21C and 21C are the other end portions 21B and 21B. It arrange | positions so that it may mutually distance as it goes to (refer FIG. 2).

  The pressing portion 31 includes a front covering portion 41 and a side covering portion 42. The front covering portion 41 is provided over the both end surfaces 21D and 21D of the one end portions 21A and 21A of the pair of filter panels 21 and 21, and covers the both end surfaces 21D and 21D and the gap 44. The side covering portion 42 protrudes rearward from the front covering portion 41 through the gap 44.

  The front covering portion 41 includes a first covering portion 51 that covers an end surface 21D of one end portion 21A of one filter panel 21, a second covering portion 52 that covers an end surface 21D of one end portion 21A of the other filter panel 21, and these. It is composed of an adhesive 53 to be bonded. As shown in FIG. 1, the first and second covering portions 51 and 52 have a substantially rectangular plate shape that is long in the left-right direction. The side covering portion 42 includes first and second projecting portions 61 and 62 that cover portions of the one surfaces 21C and 21C of the pair of filter panels 21 and 21, respectively.

  The first protruding portion 61 protrudes from the base end 51 </ b> A (one end in the width direction) of the first covering portion 51. The first protruding portion 61 is integrated with the first covering portion 51 and constitutes a first L-shaped member 71 having an L-shaped cross section. The first L-shaped member 71 is fitted into the corner portion 21E of one filter panel 21, whereby the first covering portion 51 and the first projecting portion 61 are respectively the end surface 21D and one surface 21C of the one filter panel 21. Abut each.

  The second protruding portion 62 protrudes from the base end 52A (one end in the width direction) of the second covering portion 52. The 2nd protrusion part 62 is united with the 2nd coating | coated part 52, and comprises the 2nd L-shaped member 72 of an L-shaped cross section. The second L-shaped member 72 is fitted to the corner portion 21E of the other filter panel 21, whereby the second covering portion 52 and the second projecting portion 62 are respectively connected to the end surface 21D and the entire surface 21C of the other filter panel 21. Abut each. The first and second projecting portions 61 and 62 are arranged perpendicular to the first and second covering portions 51 and 52, respectively.

  The 1st and 2nd protrusion parts 61 and 62 exhibit the substantially rectangular plate shape long in the left-right direction similarly to the 1st and 2nd side coating | cover parts 51 and 52. As shown in FIG. The first and second protrusions 61 and 62 may be provided from one end to the other end in the longitudinal direction of the first and second covering portions 51 and 52, but in the vicinity of both ends so as not to contact the guide rail 16. Then it may be removed.

  The first and second covering portions 51 and 52 are integrated by bonding the base ends 51 </ b> A and 52 </ b> B (that is, the corner portions of the L-shaped member) with an adhesive 53. In the present embodiment, the gaps 44 between the pair of filter panels 21 and 21 are closed by adhering the covering portions 51 and 52 (that is, the L-shaped members 71 and 72) with the adhesive 53. Air is prevented from passing through 44.

  The first covering portion 51 has a width W shorter than the thickness T of one filter panel 21 and covers only a part of the end surface 21D. Similarly, the first protrusion 61 has a protrusion height (width length) H shorter than the thickness T, and covers only a portion near the end surface 21D of the one surface 21C of the one filter panel 21. Therefore, the pressure loss due to the pressing portion 31 is relatively small.

  On the other hand, in the present embodiment, the separation distance R between the tip 51B (the other end in the width direction) of the first covering portion 51 and the tip 61B (the one end in the width direction) of the first protrusion 61 is the one filter panel 21. Is equal to the thickness T. Air that has entered the inside of the panel 21 from the end surface 21D is discharged from the one surface 21C and passes through the panel 21, but is not discharged in the vicinity of the end surface 21D because it is blocked by the protruding portion 61. Therefore, the air that has entered the panel 21 from the end face 21D must pass through the path at least for the filter thickness T, similarly to the air that has entered from the other face 21S of the panel 21 (the panel face on the opposite side of the one face 21C). I must. That is, in this embodiment, since the distance of the shortest path of ventilation in the filter panel 21 is not less than the thickness T, the gas adsorption performance of the chemical filter unit 20 does not deteriorate.

  In addition, the 2nd coating | coated part 52, the 2nd protrusion part 62, and the other filter panel 21 also have the same dimension as the 1st coating | coated part 51, the 1st protrusion part 61, and the one filter panel 21, and the same Since it has an effect | action, those description is abbreviate | omitted. In the present embodiment, the separation distance R is equal to the thickness T, but may be longer than the thickness T. Further, the separation distance R is a distance between the tip portions 51B and 61B at a portion where the positions match in the left-right direction, and corresponds to the shortest separation distance between the tip portions 51B and 61B.

  Next, a method for assembling the air filter 10 in the present embodiment will be described. In the present embodiment, first, the filter panel 21 is inserted into the square frame filter frame 11 from the front opening 39A or the rear opening 39B. Next, the first and second L-shaped members 71 and 72 are fitted to the corners 21E and 21E of the filter panels 21, respectively. And the adhesive agent 53 is poured between these L-shaped members 71 and 72, the two L-shaped members 71 and 72 are adhere | attached, and the holding | suppressing parts 31 and 32 are formed. Further, each of the L-shaped members 71 and 72 fitted to the corners 21E and 21E is attached to the both side frame portions 14 and 15 by screws or the like at both ends in the longitudinal direction, whereby the air filter 10 Is obtained.

  In the present embodiment, one of the pressing portions 31 and 32 may be integrated by connecting two L-shaped members 71 and 72 in advance by welding or the like. However, such a pressing portion needs to be attached to the filter frame before the filter panel 21 is inserted into the filter frame 11.

DESCRIPTION OF SYMBOLS 10 Air filter 20 Chemical filter unit 21 Filter panel 21A One end part 21C One side 21D End face 21E Corner part 31, 32 Holding part 41 Front coating | coated part 42 Side coating | coated part 51 1st coating | coated part 52 2nd coating | coated part 53 Adhesive 61 1st Projection 62 Second Projection

Claims (8)

Adsorbents are filled in a case having air permeability, and each is constituted, one end portions are close to each other through a gap, the other end portions are spaced apart and arranged in a V shape, and one surface faces each other. A pair of filter panels;
A first covering portion that covers a part of the end surface of the one end of the one filter panel, and a first protrusion that protrudes from the first covering portion and covers a portion of the one surface of the one filter panel. One member;
A second covering portion that covers a part of the end surface of the one end of the other filter panel, and a second protruding portion that protrudes from the second covering portion and covers a portion of the one surface of the other filter panel. Two members,
The chemical filter unit, wherein the first and second members are connected so as to close the gap. The separation distance between the tip of the first covering portion and the tip of the first protrusion is equal to or greater than the thickness of the one filter panel,
2. The chemical filter unit according to claim 1, wherein a distance between the tip of the second covering portion and the tip of the second protrusion is equal to or greater than the thickness of the other filter panel. The separation distance between the tip of the first covering portion and the tip of the first protrusion is equal to the thickness of the one filter panel,
The chemical filter unit according to claim 2, wherein a separation distance between a tip of the second covering portion and a tip of the second protrusion is equal to a thickness of the other filter panel. The first protruding portion protrudes from the base end of the first covering portion, and these integrally form a first L-shaped member,
2. The chemical filter unit according to claim 1, wherein the first L-shaped member is fitted into a corner formed by the one surface and the end surface of the one filter panel. The second protruding portion protrudes from the base end of the second covering portion, and these integrally form a second L-shaped member,
The second L-shaped member is fitted to a corner formed by the one surface and the end surface of the other filter panel,
5. The chemical filter unit according to claim 4, wherein a base end of the first covering portion is connected to a base end of the second covering portion.   The chemical filter unit according to claim 1, wherein the first and second members are bonded and connected with an adhesive. The pair of filter panels are arranged inside a filter frame that is open at the front and rear,
The one end is disposed on one opening side of the filter frame, and the other end is disposed on the other opening side of the filter frame,
2. The chemical filter unit according to claim 1, wherein the first and second members are provided so as to span the filter frame on the one opening side. A pair of filter panels, each of which is configured by filling an adsorbent in a case having air permeability, and having one end portions close to each other through a gap and the other end portions being spaced apart from each other and arranged in a V shape,
A front covering portion that is provided over both end surfaces of the one end portion of the pair of filter panels and covers a part of each end surface and the gap;
A chemical filter unit comprising: a side covering portion that protrudes from the front covering portion through the gap so as to cover a part of each of the mutually opposing surfaces of the pair of filter panels.

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