Disclosure of Invention
An object of the present invention is to provide a main filter element for a side-suction air cleaner, which can be accurately positioned when assembled again after maintenance and repair, and is convenient to assemble and disassemble.
Another object of the present invention is to provide an air cleaner that allows the main filter element to be removed for maintenance and repair without removing the air cleaner and other component attachment structures.
To achieve the purpose, the invention adopts the following technical scheme:
the main filter element comprises a main filter element shell and a direct current main filter element body, wherein a core rib plate is convexly arranged on the side wall of the main filter element shell, a first core positioning part is arranged on the core rib plate, and the first core positioning part is used for being matched with a convex rib on the inner wall of a shell of the air filter and a first cover body clamping structure arranged on an access cover; the first cover body clamping structure can be located between the core rib plate and the convex ribs, one end of the first cover body clamping structure is abutted to the first core body positioning part, and the other end of the first cover body clamping structure is abutted to the convex ribs, so that the main filter element can be matched with the axial positioning structure in the air filter.
Through set up the core gusset on main filter core lateral wall for the assembly location can be accomplished with the location structure cooperation on shell lateral wall and the access cover to the core gusset, no matter what kind of skew takes place for main filter core in the installation, finally can make the position of main filter core to put by the protruding muscle of first lid screens structure and shell inner wall on the access cover, thereby guarantees the close fit of main filter core and other each parts of shell, has avoided the operation that needs correct main filter core position with the help of external force.
Preferably, the core rib plate is further provided with a core guide part, the core guide part and the first core positioning part are both arranged on the same side of the core rib plate, and the core guide part moves in or moves out of the shell along the guide wall on the convex rib.
Preferably, the core rib plate is further provided with a second core positioning part, the second core positioning part is arranged on one side, far away from the first core positioning part, of the core rib plate, and the second core positioning part can be matched with the positioning wall of the inner wall of the shell.
Preferably, the profile of the second core positioning portion is a slant line, a concave arc line or a convex arc line.
Preferably, the outer wall of the main filter element is provided with a circumferential sealing ring, and the circumferential sealing ring is in close contact with the inner wall of the shell.
Preferably, a sealing groove is further formed in the outer wall of the main filter element, and the circumferential sealing ring is placed in the sealing groove.
Preferably, the circumferential sealing ring comprises a first abutting surface, a second abutting surface, a third abutting surface, a guiding surface, a sealing surface and a transition surface which are connected end to end, wherein the first abutting surface is in contact with the side wall of the sealing groove; the second abutting surface is in contact with the bottom surface of the sealing groove; the third abutting surface is in contact with the other side wall of the sealing groove; the guide surface is an inclined surface, and the distance between the guide surface and the second abutting surface gradually increases from the third abutting surface towards the first abutting surface; the sealing surface is higher than the first abutting surface and the third abutting surface, and is used for being in sealing contact with the inner wall of the shell; one end of the transition surface is connected with the sealing surface, and the other end of the transition surface is connected with the third abutting surface.
Preferably, a handle is provided on a side wall of the main cartridge housing to facilitate movement of the main cartridge into and out of the housing.
Preferably, the main filter element housing comprises a first filter element housing and a second filter element housing, the first filter element housing and the second filter element housing are buckled along the axial direction of the main filter element body, and the core rib plate is arranged on the first filter element housing or the second filter element housing.
The air filter comprises a shell, wherein an air inlet is formed in one end of the shell, an air outlet is formed in the other end of the shell, an access window is formed in the side wall of the shell, an access cover is arranged on the access window, a first cover body clamping structure is arranged on the access cover, and protruding ribs are arranged on the inner wall of the shell; and further comprising a main cartridge as described above, the main cartridge being moveable into and out of the housing from the access window; and also comprises an axial positioning structure for limiting the end part of the main filter element; the first cover body clamping structure is located between the core body rib plate and the protruding ribs, one end of the first cover body clamping structure is abutted to the first core body positioning portion, and the other end of the first cover body clamping structure is abutted to the protruding ribs, so that the main filter element can be matched with the axial positioning structure.
The invention has the beneficial effects that:
1) The core rib plates are arranged on the side wall of the main filter element, so that the core rib plates can be matched with the positioning structures on the side wall of the shell and the access cover to finish assembly positioning, no matter what offset occurs in the installation process of the main filter element, the position of the main filter element can be adjusted by the first cover body clamping structure on the access cover and the convex ribs on the inner wall of the shell, the close matching of the main filter element and other parts of the shell is ensured, and the operation of correcting the position of the main filter element by means of external force is avoided;
2) Through the second core locating part on the side wall of the main filter element, correspondingly, the second locating wall is additionally arranged on the inner wall of the shell, the locating reliability among all components in the air filter is further improved, and meanwhile, the burden of the locating structures at the two axial ends of the main filter element can be lightened.
Drawings
FIG. 1 is a schematic view of an air cleaner according to a first embodiment of the present invention;
FIG. 2 is a schematic structural diagram of a main housing and an air outlet at a first view angle in accordance with an embodiment of the present invention;
FIG. 3 is a schematic view of a primary filter element according to a first embodiment of the invention;
fig. 4 is a schematic view of the structure of the access cover in the first view of the first embodiment of the present invention;
FIG. 5 is a schematic view of the structure of the access cover in accordance with a second view of the first embodiment of the invention;
FIG. 6 is a schematic cross-sectional view of an air cleaner in accordance with a first embodiment of the invention;
FIG. 7 is an enlarged schematic view of FIG. 6 at A;
FIG. 8 is a schematic structural diagram of a main housing and an air outlet at a second view angle according to a first embodiment of the present invention;
FIG. 9 is an enlarged schematic view of FIG. 8 at B;
FIG. 10 is a schematic structural diagram of a third view angle of the main casing and the air outlet according to the first embodiment of the present invention;
FIG. 11 is a schematic view of an alternative embodiment of the present invention, illustrating a first view of an air intake end cover;
FIG. 12 is a schematic view of a second view of an alternative air intake end cap according to a first embodiment of the present invention;
FIG. 13 is a schematic cross-sectional view of a circumferential seal ring in accordance with a first embodiment of the invention;
fig. 14 is a schematic view of an air cleaner according to a second embodiment of the present invention;
FIG. 15 is a schematic view of the structure of the main casing and the air outlet in the second embodiment of the present invention;
FIG. 16 is a schematic view of a primary filter cartridge in accordance with a second embodiment of the invention;
FIG. 17 is a schematic view of a first process for installing a main filter element and a housing in an air cleaner according to a second embodiment of the invention;
FIG. 18 is a schematic view of a second construction of a main filter element and housing assembly process in an air cleaner according to a second embodiment of the invention;
FIG. 19 is a schematic view of a third embodiment of an air cleaner in which a main filter element is mounted to a housing;
FIG. 20 is a schematic diagram of a fourth process for installing a main filter element and a housing in an air cleaner according to a second embodiment of the present invention;
fig. 21 is a schematic cross-sectional view of an air cleaner in accordance with a second embodiment of the present invention.
In fig. 1-13:
100. an air cleaner;
110. an air inlet end cover; 111. an air inlet; 112. a water-blocking ring; 113. a first axial positioning member; 114. a drain hole; 115. a dust discharging bag;
120. a main housing; 121. convex ribs; 1211. a first positioning wall; 1212. a guide wall; 122. the abutting bulge; 123. positioning a retainer ring;
130. an air outlet part;
140. an access cover; 141. a first cover clamping structure; 142. a second axial positioning member; 143. a clamping groove; 144. a handle groove;
150. a main filter element; 151. a core rib plate; 1511. a first core positioning portion; 1512. a core guide; 152. a handle; 153. a circumferential seal ring; 1531. a first abutment surface; 1532. a second abutment surface; 1533. a third abutment surface; 1534. a guide surface; 1535. sealing surfaces; 1536. a transition surface; 154. a first cartridge housing; 155. a second cartridge housing;
160. a safety filter element; C. drawing taper; D. assembling taper;
in fig. 14-21:
200. an air cleaner; 211. an air inlet; 213. a first axial positioning member;
221. convex ribs; 2211. a first positioning wall; 2212. a guide wall; 2213. a second positioning wall; 2214. a transition wall;
241. a first cover clamping structure; 242. a second axial positioning member;
250. a main filter element; 251. a core rib plate; 2511. a first core positioning portion; 2512. a core guide; 2513. a second core positioning portion; 254. a first cartridge housing; 255. a second cartridge housing; 256. and an auxiliary rib plate.
Detailed Description
In order to make the technical problems solved by the present invention, the technical solutions adopted and the technical effects achieved more clear, the technical solutions of the embodiments of the present invention will be described in further detail below with reference to the accompanying drawings, and it is obvious that the described embodiments are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to fall within the scope of the invention. The technical scheme of the invention is further described below by the specific embodiments with reference to the accompanying drawings.
Example 1
As shown in fig. 1-13, the embodiment discloses an air filter 100, the air filter 100 includes a housing, one end of the housing is provided with an air inlet 111, the other end is provided with an air outlet, a direct-current main filter element 150 is arranged in the housing, and air enters from the air inlet 111, passes through the main filter element 150 to filter the air, and is discharged from the air outlet. In this embodiment, a safety filter element 160 is further disposed on a side of the main filter element 150 near the air outlet, and the safety filter element 160 can filter air after the main filter element 150 fails.
Specifically, referring to fig. 2, 4 and 5, the air cleaner 100 of the present embodiment is of a side-draw structure, which includes an access window disposed on a side wall of the housing, and the main filter 150 can be moved into or out of the housing from the access window, and accordingly, an access cover 140 for closing the access window is further provided, and the access cover 140 can be fixedly connected to the housing, so that the air cleaner 100 can be maintained without dismantling an engine connected thereto.
When the air cleaner 100 is changed to the side-suction structure, the requirement on the positioning structure is high while the main filter element 150 and the safety filter element 160 are convenient to disassemble. The traditional axial pumping structure only needs to install and position the main filter element 150 along the axial direction, and the air filter 100 with the lateral pumping structure needs to be axially positioned after the main filter element 150 enters the shell from the side wall of the shell. The main filter 150 is generally not secured in the same condition as the final position during installation, and a corresponding structure is required to mate the main filter 150 with the housing.
In particular, referring to FIGS. 2-9, the air cleaner 100 includes an axial positioning structure for limiting the end of the main filter cartridge 150; the main filter element 150 comprises a main filter element shell and a direct current main filter element body, wherein core rib plates 151 are symmetrically and convexly arranged on the side walls of two sides of the main filter element shell, and the core rib plates 151 are provided with first core positioning parts 1511; the inner wall of the shell is provided with convex ribs 121; the access cover 140 is oppositely provided with two first cover body clamping structures 141; the first cover clamping structure 141 is located between the core rib plate 151 and the protruding rib 121, and one end of the first cover clamping structure 141 is abutted with the first core positioning portion 1511, and the other end is abutted with the protruding rib 121, so that the main filter element 150 can be matched with the axial positioning structure. Through the participation of access cover 140, no matter what kind of skew takes place for main filter core 150 in the installation, finally by the protruding muscle 121 of first lid screens 141 and shell inner wall on access cover 140 can make the position of main filter core 150 put forward to guarantee the close fit of main filter core 150 and other each parts of shell, avoided the operation that need correct main filter core 150 position with the help of external force. Of course, in other embodiments, it is not excluded that the core rib 151 may be provided on only one side wall of the main filter element housing in a protruding manner, and only one core rib 151 is relied on to realize the cooperation with the housing rib 121 and the first cover clamping structure 141.
Further, in this embodiment, the main filter element housing includes a first filter element housing 154 and a second filter element housing 155, the first filter element housing 154 and the second filter element housing 155 are fastened along the axial direction of the main filter element body, and the core rib plate is disposed on the first filter element housing 154 or the second filter element housing 155. The main cartridge housing is thus configured to facilitate assembly of the main cartridge 150. Of course, in order to ensure the tightness of the main filter element housing, the leakage of dust filtered by the main filter element 150 from the gap between the first filter element housing 154 and the second filter element housing 155 is avoided, and a circle of sealant is further provided at the place where the first filter element housing 154 and the second filter element housing 155 are buckled with each other.
Further, referring to fig. 4 again, the side of the first cover body clamping structure 141 facing the main filter element 150 can be abutted against the side wall of the main filter element 150, so that the relative fixation of the circumferential direction of the main filter element 150 and the access cover 140 can be realized; and, the side of the core body rib plate 151 far away from the main filter element 150 can be abutted against the side wall of the main filter element 150, so that the relative fixation between the circumference of the main filter element 150 and the shell is realized.
Further, referring to fig. 2-3, the air cleaner 100 includes a guide structure including a guide wall 1212 disposed on the rib 121, and a core guide portion 1512 disposed on the core rib 151, wherein the core guide portion 1512 and the first core positioning portion 1511 are disposed on the same side of the core rib, and the core guide portion 1512 moves into or out of the housing along the guide wall 1212. When the main cartridge 150 enters the housing, the cartridge guide 1512 comes into contact with the guide wall 1212 of the housing inner wall; when the main cartridge 150 is removed from the housing, the first cartridge positioning portion 1511 is advanced out of the housing. The guide structure is provided to allow the main cartridge 150 to be smoothly moved into or out of the housing in a predetermined trajectory, avoiding excessive deflection of the main cartridge 150 when moved into or out of the housing, resulting in the need for reassembly of the main cartridge 150.
In this embodiment, the rib 121 includes a first straight line segment clamped to the first cover body, and a second straight line segment serving as the guiding wall 1212, where the first straight line segment and the second straight line segment form an included angle, and the included angle is greater than 90 degrees. Accordingly, the first core positioning portion 1511 and the core guiding portion 1512 are disposed on the same side of the core rib plate 151. When the primary cartridge 150 is inserted into the housing, the first cover detent structure 141 on the access cover 140 separates the cartridge guide 1512 from the guide wall 1212 for positioning.
Further, the axial positioning structure includes a positioning retainer 123 disposed at one end of the main filter element 150, and an axial positioning member disposed at the other end of the main filter element 150. The axial positioning members comprise a first axial positioning member 113 and a second axial positioning member 142 which are oppositely arranged, the first axial positioning member 113 is arranged on the inner wall of the air inlet end cover or the outer shell, and the second axial positioning member 142 is arranged on the access cover 140. Specifically, in this embodiment, the end of the main filter element 150 near the air outlet is provided with a safety filter element 160, and the housing is provided with a plurality of abutment protrusions 122, the plurality of abutment protrusions 122 are arranged at intervals, and the abutment protrusions 122 can abut against the end of the safety filter element 160 near the air outlet, so that the axial positioning structure of the safety filter element 160 has lighter weight; and the section of the safety filter element 160 is slightly smaller than that of the main filter element 150, one end of the safety filter element 160 away from the air outlet is abutted with one end of the main filter element 150, and the other end of the main filter element 150 is positioned by means of an axial positioning piece. Thus, the main filter element 150 can not only rely on the positioning retainer ring 123 to axially position the end close to the air outlet, but also can rely on the safety filter element 160 to axially position the end close to the air outlet. In order to avoid the influence of the axial positioning member on the installation process of the main filter element 150, in this embodiment, a first axial positioning member 113 is disposed near the bottom of the housing, that is, a position opposite to the access cover 140 is provided with the first axial positioning member 113; and a second axial positioning member 142 is correspondingly provided on the access cover 140. As shown in fig. 4 and 6, the first axial positioning member 113 and the second axial positioning member 142 each abut against the end of the main filter element 150 using a rib plate provided with reinforcing ribs. The main filter element 150 can incline a certain angle to enter the shell before entering the shell bottom towards one end close to the safety filter element 160 or the positioning retainer ring 123 by virtue of the guide structure in the installation process, and meanwhile, the movement of the main filter element 150 cannot be influenced by the first axial positioning piece 113 arranged at the position close to the shell bottom until the main filter element 150 moves to the shell bottom and is contacted with the first axial positioning piece 113, at this time, the inclined main filter element 150 is corrected and fixed by the first cover body clamping structure 141 on the access cover 140 by installing the access cover 140 on the shell, and one end of the main filter element 150 is positioned by the positioning retainer ring 123. Further, the first axial positioning member 113 is further provided with a guiding inclined surface, so as to avoid interference to the main filter element 150 entering the housing.
Further, in this embodiment, the housing includes an air inlet end cover 110, a main housing 120 and an air outlet portion 130 that are sequentially set, the air inlet end cover 110 is provided with an air inlet 111, an access window is set on the main housing 120, and an air outlet is set on the air outlet portion 130, where the main housing 120 and the air outlet portion 130 are integrally formed. In this embodiment, no structure is provided in the housing far away from the access window, only the ribs 121 are provided on the side wall of the housing, and the main housing 120 and the air outlet 130 can be integrally formed through practice verification, so that a connection structure and a sealing structure for connecting the main housing 120 and the air outlet 130 can be avoided, and meanwhile, the assembly and production time of the housing can be reduced. In this embodiment, the first axial positioning member 113 is disposed on the inner wall of the air inlet cover 110 connected to the main housing 120, which is beneficial to injection molding of the housing.
Further, referring to fig. 10, the main housing 120 is provided with a draft taper C that gradually increases from the air outlet portion toward the air inlet end cap. The arrangement is convenient for drawing the mould after the injection molding of the shell, and the inclination of the mould is preferably 1-2 degrees. In this embodiment, an assembly taper D is provided on a side of the main housing 120 away from the access window, where the assembly taper D gradually increases from the air outlet portion toward the air inlet end cover, and preferably the assembly taper D is 2-8 degrees. This arrangement facilitates the installation of the main cartridge in cooperation with the main housing 120. Specifically, the main filter element 150 can incline a certain angle to enter the shell before being installed, when the main shell 120 is provided with a certain assembly taper D, the assembly taper D provides a yielding space for the main filter element to incline when the main filter element 150 is obliquely entered into the main shell, and the clamping stagnation phenomenon can not occur with the main shell 120, so that the main filter element can be assembled smoothly.
Preferably, the air inlet 111 is internally provided with a laminar water retaining ring 112, the water retaining ring 112 comprises a free end and a connecting end, the connecting end is connected with one end, close to the main filter element 150, in the air inlet, the free end is located at one side, far away from the main filter element 150, and the cross-sectional area of the water retaining ring 112 gradually increases towards the direction, close to the main filter element 150. In this embodiment, the water blocking ring 112 is disposed on the air inlet end cover 110, water droplets are sometimes mixed in the air, and under the adsorption of the air filter 100, the water droplets will wet the filter paper of the main filter element 150 along the inner wall of the air inlet 111, so that the main filter element 150 will fail, and by disposing the water blocking ring 112, part of the water droplets are blocked at the air inlet 111, so as to avoid the water droplets affecting the main filter element 150 as much as possible. Further, the air inlet end cap 110 is provided with a dust exhaust bag 115 communicating with the air inlet for exhausting dust and water drops not entering the main filter 150. In addition, referring to the schematic structural diagrams of the other air inlet end cover provided in fig. 11 and 12, a water outlet is formed in the side wall of the casing, and a deformable baffle is arranged outside the water outlet. That is, water entering the air cleaner 100 can be discharged from the drain opening, and the deformable flap is washed away by water when the water passes through the drain opening, and the drain opening is blocked by the negative pressure of the air cleaner 100 when no water passes through the drain opening. Wherein the water discharge opening is generally provided at the lowest position of the inner wall of the air inlet 111 for water discharge. Here, since the installation space of the motor vehicle for the air cleaner 100 determines the arrangement requirements of the air cleaner 100, the minimum is defined according to the arrangement requirements of the air cleaner 100. The setting position of the water outlet can be adjusted according to actual conditions by a person skilled in the art. In addition, the main housing 120 may also be provided with a drain opening, and the design principle and specific structure are similar to those of the drain opening provided at the air inlet 111, which will not be described herein.
In addition, referring to FIG. 3, to facilitate movement of the main cartridge 150 into and out of the housing, a handle 152 is provided on a sidewall of the main cartridge housing to facilitate movement of the main cartridge into and out of the housing. When the main cartridge is installed in the housing of the air cleaner, the handle 152 is positioned on a side adjacent the access window. Wherein the handle 152 of the main cartridge 150 may be disposed perpendicular to the axis of the main cartridge 150 or may be disposed parallel to the axis. In this embodiment, the handle 152 of the main filter 150 may be protruding on the side wall of the main filter 150, so that the filtering area of the main filter 150 is not affected. Referring to fig. 4, accordingly, the access cover 140 body may be provided with a slot 143 for receiving a portion of the handle 152, the slot 143 being configured to not only receive the handle 152, but also to position the main cartridge 150 in another location.
Further, referring to fig. 5, in order to facilitate the taking and placing of the access cover 140, a handle groove 144 is provided at the outer side of the access cover 140.
The access cover 140 and the air inlet end cover 110 are connected with the main housing 120 through screws, so that the structure is simple, and the manufacturing cost is low.
Further, referring to fig. 3 and 13, the outer wall of the main cartridge 150 is provided with a circumferential seal ring 153, and the circumferential seal ring 153 is in close contact with the inner wall of the housing. In this embodiment, the circumferential seal 153 is disposed at an end of the main filter 150 near the air outlet. And, the outer wall of main filter core still is provided with sealed recess, and circumferential seal 153 is placed to sealed recess, can guarantee like this that the sealing washer can be firm set up on main filter core. The circumferential seal ring 153 includes a first abutting surface 1531, a second abutting surface 1532, a third abutting surface 1533, a guiding surface 1534, a sealing surface 1535, and a transition surface 1536, which are connected end to end, wherein the first abutting surface 1531 contacts with a side wall of the seal groove; the second abutment surface 1532 is in contact with the bottom surface of the sealing recess; the third abutment surface 1533 is in contact with the other sidewall of the sealing recess; the guide surface 1534 is an inclined surface, and the distance between the guide surface 1534 and the second contact surface 1532 gradually increases from the third contact surface 1533 toward the first contact surface 1531; the sealing surface 1535 is higher than the first and third abutment surfaces 1531, 1533, and the sealing surface 1535 is for sealing contact with the housing inner wall; one end of the transition surface 1536 is connected to the sealing surface 1535, and the other end is connected to the third abutment surface 1533; and the guide surface 1534 faces one end of the air outlet. The guiding surface 1534 of the circumferential sealing ring 153 has a certain guiding function, and the asymmetric structure of the circumferential sealing ring 153 can avoid local deformation of the housing caused by overlarge compression amount when the circumferential sealing ring 153 seals.
In addition, it should be noted that, at the contact and positioning position between the safety filter element 160 and the inner wall of the housing, a sealing ring may be disposed as required by those skilled in the art, which is not listed in this embodiment.
Example two
As shown in fig. 14 to 21, this embodiment discloses an air cleaner 200, which is basically the same as the air cleaner 100 of the first embodiment, except that, referring to fig. 9 and 10, the inner wall of the housing is provided with a positioning wall, and correspondingly, the core rib plate 251 is provided with a second core positioning portion 2513, and the second core positioning portion 2513 is attached to the positioning wall. In this embodiment, referring to fig. 11-15, the second core positioning portion 2513 is disposed on one side of the core rib plate 251 away from the first core positioning portion 2511, after the guiding movement of the main filter element 250 is completed, the main filter element 250 moves in a direction away from the rib 121 under the action of the first cover clamping structure 241 and approaches to the positioning wall disposed on the housing, and the positioning wall is disposed on one end of the housing close to the air outlet, so that the one end of the main filter element 250 close to the air outlet can be limited not only by the positioning retainer 123, but also by the positioning wall, thereby reducing the load of the positioning retainer 123. The profile of the second core positioning portion 2513 is a diagonal line, a concave arc line or a convex arc line, and correspondingly, the profile of the positioning wall may be a diagonal line, a convex arc line or a concave arc line. In this embodiment, the outer side of the housing is provided with a supporting seat for positioning the air filter 200, so as to avoid weakening the strength of the supporting seat, the contour of the positioning wall adopts a convex arc structure, the contour of the second core positioning portion 2513 is a concave arc, so that the outer side of the housing can be avoided, and meanwhile, the contour is a positioning wall with an arc and a diagonal contour, the contact surface between the former and the second core positioning portion 2513 is larger, and the positioning strength is ensured. By adding the second positioning wall 2213 and the second core positioning portion 2513 on the inner wall of the housing and the side wall of the main filter element 250, positioning reliability between each component in the air filter 200 is further increased, and meanwhile, the burden of positioning structures at two axial ends of the main filter element 250 can be reduced. In addition, the first positioning wall 2211, the guiding wall 2212 and the second positioning wall 2213 on the side wall of the housing are formed continuously, which not only plays the roles of positioning and guiding, but also plays the role of correcting the assembly offset, and has a simple structure.
In addition, referring again to fig. 9, the side wall of the housing is further provided with a transition wall 2214, the transition wall 2214 is disposed between the guide wall 2212 and the positioning wall, the core rib plate 251 completes the step of guiding the main filter element 250 into the housing, and may approach the positioning wall along the transition wall 2214, and further complete the positioning of the main filter element 250 with the positioning wall. In the present embodiment, the profile of the transition wall 2214 is linear, one end of the transition wall 2214 is connected with the guide wall 2212, and the other end of the transition wall is connected with the positioning wall, so that smoothness of the core rib plate 251 in the installation process is ensured. Meanwhile, the transition wall 2214 also plays a role in limiting, referring to fig. 13-15, when the main filter element 250 enters the housing along the guide wall 2212 and contacts with the transition wall 2214 to limit, the main filter element 250 does not need to be pushed into the housing, at this time, the second core positioning portion 2513 of the main filter element 250 can be attached to the positioning wall by means of the first cover body clamping structure 241 of the access cover, and the first axial positioning member 213 and the second axial positioning member 242 are clamped at one end of the main filter element 250 close to the air inlet 211, so that the installation of the main filter element 250 is completed.
Further, an auxiliary rib plate is further arranged on the side wall of the main filter element shell, and the auxiliary rib plate and the core rib plate can be in butt joint with the inner wall of the shell. When the lengths of the first and second cartridge housings 254, 255 in the axial direction are substantially equal, the core rib 251 can only be provided on either the first or second cartridge housing 254, 255, and when the main cartridge 150 is mounted in cooperation with the housing, a gap will exist between the second cartridge housing 255 and the housing inner wall. When the core rib plate 251 is disposed on the side wall of the first filter element housing 254, the auxiliary rib plate 256 is disposed on the side wall of the second filter element housing 255, where the auxiliary rib plate 256 can also abut against the inner wall of the housing, so as to ensure stable installation of the main filter element 150 in the housing. When the first and second cartridge housings 254, 255 have a longer length in the axial direction and a shorter length, the core web 251 may be disposed near the middle of the main cartridge housing, thereby eliminating the provision of the auxiliary web 256. Of course, the provision of the auxiliary gusset 256 is only a preferred option, and the provision of the auxiliary gusset 256 can be omitted even when the lengths of the first and second cartridge housings 254, 255 in the axial direction are substantially equal.
It is to be understood that the above examples of the present invention are provided for clarity of illustration only and are not limiting of the embodiments of the present invention. Other variations or modifications of the above teachings will be apparent to those of ordinary skill in the art. It is not necessary here nor is it exhaustive of all embodiments. Any modification, equivalent replacement, improvement, etc. which come within the spirit and principles of the invention are desired to be protected by the following claims.