Flat filter element of straight-through chemical air filter for fuel cell vehicle

Abstract

The utility model discloses a straight-through type chemical air filter flat filter element for a fuel cell vehicle, which comprises a framework, the framework comprises a cylindrical structure, the section of the cylindrical structure perpendicular to the axis of the cylindrical structure is runway-shaped, the plane where a short shaft and the axis of the cylindrical structure are located is called as a short shaft plane, and the section of the cylindrical structure cut by the short shaft plane is trapezoidal. The bottom edge of one side of the trapezoid is longer than the bottom edge of the other side, the end where the longer bottom edge is located serves as an air outlet end, and the end where the shorter bottom edge is located serves as an air inlet end. A filter layer is arranged on the cylindrical structure in a surrounding manner, the air inlet end of the cylindrical structure is connected with an air inlet end cover, and the part, connected with the filter layer, of the air inlet end cover is a plate-shaped closed part; and the air outlet end of the cylindrical structure is connected with an air outlet end cover. The framework with the runway-shaped section forms the flat filter element, the structural strength of the filter element is enhanced, and the flat filter element is suitable for being made of carbon-containing non-woven fabric. The filter layer adopts a structure that the air outlet end is larger than the air inlet end, so that air at each part of the dirty air cavity can uniformly pass through the filter layer, and the service life of the filter element is prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field of air filtration, in particular to a flat filter element. Background Art

[0002] With the development of fuel cell engines, their power is getting higher and higher, and their application scenarios are changing from light trucks and buses to heavy trucks, dump trucks and other heavy vehicles. As fuel cell engines have higher power, the required air flow is also increased accordingly, and the corresponding air filter volume is also increased accordingly.

[0003] Due to the space layout of the vehicle, the installation space in the vehicle cannot meet the layout requirements of a larger cylindrical filter element, so a flat air filter is needed to meet the layout requirements. The flat air filter used in traditional internal combustion engines is generally a straight-through structure, and the filter material is honeycomb.

[0004] The filter material of the chemical air filter for fuel cell vehicles is carbon-containing non-woven fabric, that is, non-woven fabric containing activated carbon. Although activated carbon itself has high adsorption, it does not have significant structural strength, and the bond between activated carbon and non-woven fabric fibers is relatively loose, so the carbon-containing non-woven fabric has low stiffness, and the honeycomb structure cannot be used to prepare a flat straight-through filter element.

[0005] The utility model aims to design a flat filter element suitable for carbon-containing non-woven fabric materials (materials with low stiffness). Utility Model Content

[0006] The utility model aims to provide a flat filter element structure of a straight-through chemical air filter for a fuel cell vehicle suitable for a carbon-containing non-woven fabric material, and the filter element has a long service life.

[0007] To achieve the above-mentioned purpose, the utility model of the straight-through chemical air filter flat filter element for fuel cell vehicles includes a frame, the frame includes a cylindrical structure for carrying the filter element, the cross section of the cylindrical structure perpendicular to its axis is in the shape of a runway, and the line between the two points closest to the opposite sides of the cross section of the runway-shaped cylindrical structure is called the short axis;

[0008] The plane where the minor axis and the axis of the cylindrical structure are located is called the minor axis plane. The cross section of the cylindrical structure intercepted by the minor axis plane is trapezoidal, and the base of one side of the trapezoid is longer than the base of the other side. The end where the longer base is located is the air outlet end, and the end where the shorter base is located is the air inlet end.

[0009] A filter layer is arranged around the cylindrical structure, and the cross section of the filter layer intercepted by the short axis plane is also trapezoidal, and the corresponding angle of the trapezoidal cross section of the filter layer is equal to the trapezoidal cross section of the cylindrical structure; the air outlet end of the trapezoidal cross section of the filter layer is larger than the air inlet end of the trapezoidal cross section of the filter layer;

[0010] The air inlet end of the cylindrical structure of the skeleton is connected with an air inlet end cover, the part where the air inlet end cover and the filter layer meet is a plate-shaped closing part, and a plurality of air inlet through holes are arranged on the air inlet end cover at the circumferential periphery of the plate-shaped closing part; the circumferential outer surface of the air inlet end cover is used to match with the inner wall of the shell at the air inlet of the straight-through chemical air filter,

[0011] The outlet end of the cylindrical structure of the frame is connected with an outlet end cover, and the circumferential outer surface of the outlet end cover is used to seal with the inner wall of the shell at the outlet of the straight-through chemical air filter; the outlet end cover is in the shape of a runway surrounding the cylindrical structure of the frame;

[0012] The filter layer at the air inlet end is bonded and sealed to the plate-shaped sealing portion of the air inlet end cover, and the filter layer at the air outlet end is bonded and sealed to the air outlet end cover.

[0013] The skeleton also includes an air inlet end skeleton and an air outlet end skeleton;

[0014] The air intake end frame is a perforated plate, which is perpendicular to the axis of the cylindrical structure of the frame and fixedly connected to the cylindrical structure; the perforated plate is fixedly connected to the plate-shaped closing part of the air intake end cover by bolts;

[0015] The air outlet frame includes a grille structure covering the air outlet of the cylindrical structure; the grille structure outside the cylindrical structure protrudes toward the air outlet direction and is provided with a runway-shaped connecting tube, which is embedded in the air outlet cover and bonded and sealed with the air outlet cover.

[0016] The air inlet end cover is provided with a handle structure.

[0017] The utility model has the following advantages:

[0018] The utility model has a simple structure, forms a flat filter element through a skeleton with a runway-shaped cross section and enhances the structural strength of the filter element, and is suitable for making a flat filter element with carbon-containing non-woven fabric (the filter layer is a folded structure rather than a winding structure).

[0019] A dirty air cavity is formed between the circumferential outer wall of the filter layer and the inner wall of the shell of the straight-through chemical air filter. If a structure in which the outlet end and the inlet end are the same size is adopted, the gas in the dirty air cavity is more likely to pass through the filter layer through the position near the inlet end and enter the clean air cavity surrounded by the frame. In the utility model, the filter layer adopts a structure in which the outlet end is larger than the inlet end. The closer the dirty air cavity is to the outlet end, the narrower it is, so that the gas is more likely to contact and pass through the filter layer. In this way, the phenomenon of "the gas in the dirty air cavity is more likely to pass through the filter layer through the position near the inlet end" is partially neutralized, so that the gas in various parts of the dirty air cavity passes through the filter layer more evenly, thereby increasing the service life of the filter element.

[0020] The air inlet frame and the air outlet frame further improve the structural strength of the filter element on the one hand, and help to improve the tightness of the connection between the air outlet cover and the air inlet cover and the filter layer on the other hand, and improve the sealing of the connection between the filter layer and the air inlet cover and the air outlet cover. Specifically, the connecting tube facilitates the PU glue to fill the entire end surface and wrap the filter layer when the air outlet cover is formed by PU glue injection, ensuring that there is no bypass phenomenon inside the filter layer.

[0021] In the utility model, the frame can effectively support the outlet cover and the filter layer therein, and prevent the outlet cover from being deformed and causing bypass when the filter element is pushed into the housing of the straight-through chemical air filter, thereby avoiding the failure of the seal due to the bypass of part of the gas without filtering through the filter layer. The handle structure facilitates manual operation when installing and removing the filter element. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a structural schematic diagram of the utility model.

[0023] Figure 2 yes Figure 1 Right view of .

[0024] Figure 3 yes Figure 1 Left view of .

[0025] Figure 4 yes Figure 1 Top view of the .

[0026] Figure 5 yes Figure 4 AA section view. Figure 5 The direction indicated by the arrow in the middle is the airflow direction during use.

[0027] Figure 6 It is a three-dimensional structural schematic diagram of the utility model.

[0028] Figure 7 It is a three-dimensional structural schematic diagram of the utility model from another angle.

[0029] Figure 8 It is a schematic diagram of the three-dimensional structure of the skeleton. DETAILED DESCRIPTION

[0030] like Figures 1 to 8 As shown, the flat filter element of the straight-through chemical air filter for a fuel cell vehicle of the utility model comprises a plastic frame, the frame comprises a cylindrical structure 1 for supporting the filter element, the cross section of the cylindrical structure 1 perpendicular to its axis 2 is in a runway shape (thus forming a flat filter element structure), the line connecting the two points on the cross section of the runway-shaped cylindrical structure 1 (the cross section is perpendicular to the axis 2 of the cylindrical structure 1) that are closest to the two opposite sides is called the short axis 3; the line connecting the two points on the cross section of the runway-shaped cylindrical structure 1 that are farthest from the two opposite sides is called the long axis.

[0031] The plane where the short axis 3 and the axis 2 of the cylindrical structure 1 are located (the short axis 3 and the axis 2 of the cylindrical structure 1 are on the same plane) is called the short axis plane, and the cross section of the cylindrical structure 1 intercepted by the short axis plane is trapezoidal. The plane where the long axis and the axis 2 of the cylindrical structure 1 are located is called the long axis plane, and the cross section of the cylindrical structure 1 intercepted by the long axis plane is also trapezoidal.

[0032] One side of the trapezoid is longer than the other side, the end where the longer side is located is the air outlet, and the end where the shorter side is located is the air inlet;

[0033] A filter layer 4 is arranged around the cylindrical structure 1 of the skeleton (the filter layer 4 is made of carbon-containing non-woven fabric. Due to its low stiffness, a winding structure cannot be used to form a winding filter element, and a pleated structure is required to form a pleated filter element). The cross section of the filter layer 4 intercepted by the short axis plane is also trapezoidal, and the corresponding angles of the trapezoidal cross section of the filter layer 4 and the trapezoidal cross section of the cylindrical structure 1 are equal; the air outlet end of the trapezoidal cross section of the filter layer 4 is larger (longer) than the air inlet end of the trapezoidal cross section of the filter layer 4;

[0034] The air inlet end of the cylindrical structure 1 of the skeleton is connected with an air inlet end cover 5 (made of PU material, i.e., polyurethane material). The portion where the air inlet end cover 5 and the filter layer 4 are connected is a plate-shaped closing portion 6. A plurality of air inlet holes 7 are evenly arranged on the air inlet end cover 5 at the circumferential periphery of the plate-shaped closing portion 6. The circumferential outer surface of the air inlet end cover 5 is used to cooperate with the inner wall of the shell at the air inlet of the straight-through chemical air filter.

[0035] The air outlet end of the cylindrical structure 1 of the skeleton is connected to an air outlet end cover 9 (made of PU material, i.e., polyurethane material), and the circumferential outer surface of the air outlet end cover 9 is used to seal with the inner wall of the shell at the air outlet of the straight-through chemical air filter; the air outlet end cover 9 is in the shape of a runway surrounding the cylindrical structure 1 of the skeleton; the circumferential surface of the air outlet end cover 9 is used to form a seal with the shell of the straight-through chemical air filter, forcing the gas to be filtered through the filter layer instead of flowing directly downstream without passing through the filter layer.

[0036] The filter layer 4 at the air inlet end is bonded and sealed with the plate-shaped sealing portion 6 of the air inlet end cover 5, and the filter layer 4 at the air outlet end is bonded and sealed with the air outlet end cover 9. The air inlet end cover 5 is provided with a handle structure 8. The handle structure 8 facilitates manual operation when installing and removing the filter element. The air outlet end cover 9 is made of polyurethane material and is used to form a seal with the housing of the straight-through chemical air filter. At the same time, the air outlet end cover 9 wraps the end of the filter layer 4 and the connecting tube 13 described below and forms a wrapped sealing structure to prevent the gas from bypassing without filtering through the filter layer 4.

[0037] The utility model has a simple structure, forms a flat filter element through a skeleton with a runway-shaped cross section and enhances the structural strength of the filter element, and is suitable for using carbon-containing non-woven fabric to make the flat filter element.

[0038] A dirty air cavity is formed between the circumferential outer wall of the filter layer 4 and the inner wall of the shell of the straight-through chemical air filter. If a structure in which the outlet end and the inlet end are the same size is adopted, the gas in the dirty air cavity is more likely to pass through the filter layer 4 near the inlet end and enter the clean air cavity surrounded by the frame. In the utility model, the filter layer 4 adopts a structure in which the outlet end is larger than the inlet end. The closer the dirty air cavity is to the outlet end, the narrower it is, so that the gas is more likely to contact and pass through the filter layer 4. In this way, the phenomenon of "the gas in the dirty air cavity is more likely to pass through the filter layer 4 near the inlet end" is partially neutralized, so that the gas in various parts of the dirty air cavity passes through the filter layer 4 more evenly, thereby improving the service life of the filter element.

[0039] The skeleton also includes an air inlet end skeleton and an air outlet end skeleton;

[0040] The air intake end frame is a perforated plate 10, which is perpendicular to the axis 2 of the cylindrical structure 1 of the frame and is fixedly connected to the cylindrical structure 1 (it can also be integrally arranged); the perforated plate 10 is fixedly connected to the plate-shaped closing portion 6 of the air intake end cover 5 by bolts 11;

[0041] The air outlet skeleton includes a grid structure 12 covering the air outlet of the cylindrical structure 1, and the meshes of the grid structure 12 are irregularly distributed; the grid structure 12 outside the cylindrical structure 1 is protruding toward the air outlet direction and is provided with a racetrack-shaped connecting tube 13, which is embedded in the air outlet cover 9 and is bonded and sealed with the air outlet cover 9. The grid structure 12 supports the connecting tube 13 to prevent the connecting tube 13 and the air outlet cover 9 from being deformed and damaging the seal.

[0042] The air inlet end frame and the air outlet end frame further improve the structural strength of the filter element on the one hand, and help to improve the tightness of the combination of the air outlet end cover 9 and the air inlet end cover 5 with the filter layer 4 on the other hand, and improve the sealing of the connection parts between the filter layer 4 and the air inlet end cover 5 and the air outlet end cover 9. Specifically, the connecting tube 13 facilitates the PU glue to fill the entire end surface and wrap the filter layer 4 when the air outlet end cover 9 is formed by PU glue injection, so as to ensure that there is no bypass phenomenon inside the filter layer 4.

[0043] In the utility model, the skeleton can effectively support the outlet cover 9 and the filter layer 4 therein, and prevent the outlet cover 9 from deforming and causing bypass when the filter element is pushed into the housing of the straight-through chemical air filter, thereby avoiding that part of the gas bypasses and is not filtered through the filter layer 4, resulting in sealing failure.

[0044] After being installed in the straight-through chemical air filter, multiple air inlet holes are all connected to the air inlet of the straight-through chemical air filter; the air outlet end of the inner cavity of the skeleton is connected to the air outlet of the straight-through chemical air filter; the circumferential outer surface of the filter layer 4 and the inner wall of the shell of the straight-through chemical air filter form a dirty air cavity, and the inner cavity of the skeleton serves as a clean air cavity. After the gas to be filtered enters the air inlet of the straight-through chemical air filter, it enters the dirty air cavity through multiple air inlet holes. The gas in the dirty air cavity has only one outlet, the filter layer 4, so the gas in the dirty air cavity passes inward through the filter layer 4 into the clean air cavity. When passing through the filter layer 4, the gas is filtered. The gas in the clean air cavity flows out through the air outlet of the straight-through chemical air filter and is supplied to the fuel cell.

[0045] The above embodiments are only used to illustrate rather than limit the technical solutions of the present invention. Although the present invention is described in detail with reference to the above embodiments, those skilled in the art should understand that the present invention can still be modified or replaced by equivalents. Any modification or partial replacement that does not depart from the spirit and scope of the present invention should be included in the scope of the claims of the present invention.

Claims

1. A straight-through chemical air filter flat filter element for a fuel cell vehicle, comprising a frame, characterized in that: The skeleton includes a cylindrical structure for supporting the filter element, and the cross section of the cylindrical structure perpendicular to its axis is in the shape of a racetrack, and the line between the two points closest to the opposite sides of the cross section of the racetrack-shaped cylindrical structure is called the short axis; The plane where the minor axis and the axis of the cylindrical structure are located is called the minor axis plane. The cross section of the cylindrical structure intercepted by the minor axis plane is trapezoidal, and the base of one side of the trapezoid is longer than the base of the other side. The end where the longer base is located is the air outlet end, and the end where the shorter base is located is the air inlet end. A filter layer is arranged around the cylindrical structure, and the cross section of the filter layer intercepted by the short axis plane is also trapezoidal, and the corresponding angle of the trapezoidal cross section of the filter layer is equal to the trapezoidal cross section of the cylindrical structure; the air outlet end of the trapezoidal cross section of the filter layer is larger than the air inlet end of the trapezoidal cross section of the filter layer; The air inlet end of the cylindrical structure of the skeleton is connected with an air inlet end cover, the part where the air inlet end cover and the filter layer meet is a plate-shaped closing part, and a plurality of air inlet through holes are arranged on the air inlet end cover at the circumferential periphery of the plate-shaped closing part; the circumferential outer surface of the air inlet end cover is used to match with the inner wall of the shell at the air inlet of the straight-through chemical air filter, The outlet end of the cylindrical structure of the frame is connected with an outlet end cover, and the circumferential outer surface of the outlet end cover is used to seal with the inner wall of the shell at the outlet of the straight-through chemical air filter; the outlet end cover is in the shape of a runway surrounding the cylindrical structure of the frame; The filter layer at the air inlet end is bonded and sealed to the plate-shaped sealing portion of the air inlet end cover, and the filter layer at the air outlet end is bonded and sealed to the air outlet end cover.

2. The straight-through chemical air filter flat filter element for a fuel cell vehicle according to claim 1, characterized in that: The skeleton also includes an air inlet end skeleton and an air outlet end skeleton; The air intake end frame is a perforated plate, which is perpendicular to the axis of the cylindrical structure of the frame and fixedly connected to the cylindrical structure; the perforated plate is fixedly connected to the plate-shaped closing part of the air intake end cover by bolts; The air outlet frame includes a grille structure covering the air outlet of the cylindrical structure; the grille structure outside the cylindrical structure protrudes toward the air outlet direction and is provided with a runway-shaped connecting tube, which is embedded in the air outlet cover and bonded and sealed with the air outlet cover.

3. The straight-through chemical air filter flat filter element for a fuel cell vehicle according to claim 1 or 2, characterized in that: The air inlet end cover is provided with a handle structure.

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