CN209100166U - A kind of main filter core assembly and air cleaner assy - Google Patents

Abstract

The utility model discloses a kind of main filter core assembly and air cleaner assys, belong to motor vehicle components technical field.The main filter core assembly includes main filter core framework and is located at the main intracorporal main filter core of filter core frame, wherein main filter core framework includes the first framework and second framework that can mutually fasten, and the main filter core is single flow cellular filter core.The air cleaner assy includes above-mentioned main filter core assembly.For the utility model by the way that traditional main filter core of hollow cylindrical is changed to single flow cellular filter core, identical volume, filter area is larger, has achieved the effect that occupy little space and filter area is big；Also, after direct current filter core of the main filter core using honeycomb fashion, the first framework and second framework structure mutually fastened is simple, and is convenient for the installation of main filter core, solves the problems, such as that traditional main filter core framework can not be applicable in.

Description

A kind of main filter core assembly and air cleaner assy

Technical field

The utility model relates to motor vehicle components technical field more particularly to a kind of main filter core assemblies and air cleaner Assembly.

Background technique

Increasingly stringent with automobile emission regulation, exhaust gases of internal combustion engines processing system is more complicated and huge, so the machine of hair The installation space for leaving other engine components in cabin for is smaller and smaller, such as the installation space of air cleaner.

Main filter core assembly is hollow cylindrical in the air cleaner of mainstream at present, and volume is generally larger, and filter area Relatively small, performance is lower.

For this purpose, it is urgent to provide a kind of main filter core assemblies and air cleaner assy to solve the above problems.

Utility model content

The purpose of this utility model is to provide a kind of main filter core assembly and air cleaner assys, to realize space hold It is small, and the purpose that filter area is big.

For this purpose, the utility model uses following technical scheme:

A kind of main filter core assembly, including main filter core framework and be located at the main intracorporal main filter core of filter core frame, wherein main filter Core framework includes the first framework and second framework that can mutually fasten, and the main filter core is single flow cellular filter core.

By the way that traditional main filter core of hollow cylindrical is changed to single flow cellular filter core, identical volume, filter area It is larger, achieve the effect that occupy little space and filter area is big；Also, according to main filter core using cellular direct current filter core Afterwards, the first framework and second framework structure mutually fastened is simple, and is convenient for the installation of main filter core, solves traditional main filter core The problem that framework can not be applicable in.

Preferably, the main filter core framework is provided with the fastening for connecting first framework and the second framework Mounting structure.

Preferably, the fastening mounting structure includes the grab being set in first framework, and it is set to institute The card hole in second framework is stated, and is provided with the wedge surface for facilitating insertion into the card hole on the grab.

Preferably, the junction of first framework and the second framework seals to form connection ring using hot melt adhesive.

Preferably, first framework is provided with flanging far from one end of the second framework, the second framework is remote One end from first framework is provided with the main filter core baffle of grid grid structure, the main filter core baffle and flanging difference The both ends of the fixed main filter core.

Preferably, first framework is provided with main filter core gusset, the main filter far from one end of the second framework Core gusset extends towards the direction far from the second framework.

Preferably, the main filter core assembly is additionally provided with main filter core handle.

Preferably, the main filter core handle is convexly equipped in the described one end of first framework far from the second framework, and institute Stating main filter core handle is engraved structure.

Preferably, the outer wall of the main filter core framework is provided with main cartridge seal circle along its axial both ends.

A kind of air cleaner assy, including housing main body and the safety filter element assembly that is set in the housing main body, And it is provided with gas outlet on the housing main body, it further include above-mentioned main filter core assembly, wherein the main filter core assembly is set to The side of the safety filter element assembly, air-flow successively pass through the main filter core assembly, the safety filter element assembly and the outlet The air cleaner assy is discharged in mouth.

The utility model has the beneficial effects that

By the way that traditional main filter core of hollow cylindrical is changed to single flow cellular filter core, identical volume, filter area It is larger, achieve the effect that occupy little space and filter area is big；Also, according to main filter core using cellular direct current filter core Afterwards, the first framework and second framework structure mutually fastened is simple, and is convenient for the installation of main filter core, solves traditional main filter core The problem that framework can not be applicable in.

Detailed description of the invention

Fig. 1 is the structural schematic diagram of one of the utility model embodiment air cleaner assy；

Fig. 2 is the exploded view of one of the utility model embodiment air cleaner assy；

Fig. 3 is the sectional view of one of the utility model embodiment air cleaner assy；

Fig. 4 is enlarged diagram at A in Fig. 3；

Fig. 5 is enlarged diagram at B in Fig. 3；

Fig. 6 is the structural schematic diagram at the first visual angle of one of the utility model embodiment prefilter；

Fig. 7 is the structural schematic diagram at the second visual angle of one of the utility model embodiment prefilter；

Fig. 8 is the sectional view of one of the utility model embodiment prefilter；

Fig. 9 is the exploded view of one of the utility model embodiment prefilter；

Figure 10 is the structural schematic diagram at the first visual angle of the main filter core assembly of one of the utility model embodiment；

Figure 11 is the structural schematic diagram at the second visual angle of the main filter core assembly of one of the utility model embodiment；

Figure 12 is the exploded view of the main filter core assembly of one of the utility model embodiment；

Figure 13 is enlarged diagram at C in Figure 11；

Figure 14 is enlarged diagram at D in Figure 11；

Figure 15 is the structural schematic diagram at the first visual angle of one of the utility model embodiment safety filter element assembly；

Figure 16 is the structural schematic diagram at the second visual angle of one of the utility model embodiment safety filter element assembly；

Figure 17 is the exploded view of one of the utility model embodiment safety filter element assembly；

Figure 18 is the structural schematic diagram at the first visual angle of one of the utility model embodiment safety filter element framework；

Figure 19 is enlarged diagram at E in Figure 18；

Figure 20 is enlarged diagram at F in Figure 18；

Figure 21 is the structural schematic diagram at the second visual angle of one of the utility model embodiment safety filter element framework.

In figure:

1, housing main body；11, gas outlet；

100, prefilter；110, prefilter housing main body；111, air inlet；112, dust flue；113, dust-exhausting bag；120, after Cover board；121, gas connection hole；130, cyclone pipe；131, round tube portion；132, Taper Pipe portion；133, spinning disk；140, screw；150, Compress sealing ring；160, baffle；161, notch；

200, main filter core assembly；210, main filter core framework；211, the first framework；2111, flanging；2112, main filter core gusset； 2113, main filter core handle；212, second framework；2121, main filter core baffle；220, main filter core；230, the first sealing ring；240, Two sealing rings；250, mounting structure is fastened；251, grab；252, card hole；260, connection ring；

300, safety filter element assembly；310, safety filter element framework；311, safety filter element baffle；312, side wall；313, safety Filter core gusset；314, safety filter element handle；320, safety filter element；330, safety filter element sealing ring；340, rib.

Specific embodiment

The technical issues of to solve the utility model, the technical solution of use and the technical effect that reaches are clearer, It is described in further detail below in conjunction with technical solution of the attached drawing to the utility model embodiment, it is clear that described reality Applying example is only the utility model a part of the embodiment, instead of all the embodiments.Based on the embodiments of the present invention, It is practical new to belong to this for those skilled in the art's every other embodiment obtained without creative efforts The range of type protection.Further illustrate the technical solution of the utility model below with reference to the accompanying drawings and specific embodiments.

The present embodiment discloses a kind of air cleaner assy, as shown in Figure 1-3, including housing main body 1, in housing main body 1 It is provided with filter core assembly, further includes prefilter 100, one end and the prefilter 100 of housing main body 1 are detachably connected, and the other end is set It is equipped with the gas outlet 11 of air cleaner assy, and the air inlet 111 of air cleaner assy is set to prefilter 100 far from out One end of port 11.Wherein outside air passes through the air inlet 111 of prefilter 100, then passes through filter core assembly, later from outlet Mouth 11 enters directly into engine.By the way that prefilter 100 is integrated into air cleaner so that air cleaner assy at For single flow filter mechanism, which, which is disposed with filter core assembly and prefilter 100 along 1 axis of housing main body, is conducive to meeting hair Reduce its arrangement space while motivation is to air flow demand as far as possible, also, ambient atmos after the filtering of prefilter 100 again It enters in filter core assembly, can reduce the filtering burden of filter core assembly, to extend the service life of air cleaner.

Specifically, as Figure 6-9, prefilter 100 includes prefilter housing main body 110, back shroud 120 and through type rotation Flow tube 130, wherein prefilter housing main body 110 is connected by a snap with housing main body 1 or screw is connect；And back shroud 120 with The fastening of prefilter housing main body 110 forms prefilter chamber, and prefilter housing main body 110 is arranged far from one end of back shroud 120 There is air inlet 111, the position that air inlet 111 is corresponded on back shroud 120 is provided with gas connection hole 121, multiple through type eddy flows Pipe 130 is arranged in parallel in prefilter chamber, and one end of direct straight-through spiral-flow pipe 130 is connected to air inlet 111, other end direction Filter core assembly is simultaneously connected to gas connection hole 121.Plurality of air inlet 111 is set to prefilter housing main body in honeycomb On 110.Design one side outside air directly passes through air inlet 111 and enters in downstream filter body in this way, and intake resistance is small, produces Moral character can get a promotion；On the other hand, the air inlet rate that can utmostly improve prefilter housing main body 110, so that prefilter 100 it is total so as to further reduce air cleaner with smaller volume under conditions of same air traffic requirement At arrangement space.And the lower part of prefilter housing main body 110 is additionally provided with the dust flue 112 communicated with prefilter chamber. Outside air dust after 100 primary filtration of prefilter passes through dust flue 112 and enters the dust-exhausting bag connecting with dust flue 112 In 113, entered directly into filter core assembly by the air of primary filtration.

Wherein, referring to Fig. 8 and Fig. 9, direct straight-through spiral-flow pipe 130 includes round tube portion 131, Taper Pipe portion 132 and spinning disk 133, The smaller diameter end in Taper Pipe portion 132 is axially inserted into round tube portion 131, and the larger diameter end in Taper Pipe portion 132 and gas connection hole 121 connect Logical, the one end of round tube portion 131 far from Taper Pipe portion 132 is connected to air inlet 111, and the one end of round tube portion 131 far from Taper Pipe portion 132 It is provided with spinning disk 133, the dust that spinning disk 133 can make outside air carry is detached from air under the action of the centrifugal force, Also it is avoided that the biggish impurity of structure enters in air cleaner assy simultaneously.Preferably, Taper Pipe portion 132 and back shroud 120 It is integrally formed, and round tube portion 131 and prefilter housing main body 110 are integrally formed, and prefilter housing main body 110 and back shroud 120 are detachably connected, and design assembling, maintenance and the maintenance etc. for being convenient for prefilter 100 in this way.In this present embodiment, prefilter Housing main body 110 is connect with back shroud 120 by screw 140.In addition, the connection of prefilter housing main body 110 and back shroud 120 Place, which is additionally provided with, compresses sealing ring 150, and design in this way is avoided that the dust filtered in prefilter 100 enters from the junction of the two Into filter core assembly.

Referring again to Fig. 9, one end that round tube portion 131 connects Taper Pipe portion 132 is provided with baffle 160, and baffle 160 is in annulus Shape, and the inner wall of baffle 160 is contacted with the outer wall in Taper Pipe portion 132.On the one hand the setting of baffle 160 can be used for fixed cone pipe portion 132, on the other hand, baffle 160 can to avoid the dust that round tube portion 131 is discharged again by round tube portion 131 and Taper Pipe portion 132 it Between gap enter round tube portion 131.Further, baffle 160 is arranged jagged 161, and notch 161 is located at Taper Pipe portion 132 Lower section, i.e., be arranged close to dust flue 112, can make to enter by spinning disk 133 in this way the dust in round tube portion 131 from It is entered in dust flue 112 under the action of mental and physical efforts and gravity by the notch 161 being arranged on baffle 160.

Further, referring again to Fig. 7 and Fig. 8, prefilter housing main body 110 is provided with more in the top of dust flue 112 A guide wall 114, multiple guide walls 114 are obliquely installed in closing towards dust flue 112, are convenient for from direct straight-through spiral-flow pipe 130 Round tube portion 131 be discharged dust can smoothly enter into dust flue 112, avoid the dust stratification of prefilter housing main body 110.Wherein, Guide wall 114 can be clinoplain, or inclination cambered surface.It is clinoplain that the present embodiment, which is preferably directed wall 114,.By Verifying, the guide wall 114 of clinoplain is compared to the guide wall 114 for tilting cambered surface, so that dust is easier to glide, so as to It is effectively prevented from 110 dust stratification of prefilter housing main body.

Referring to Fig. 2 and Fig. 3, filter core assembly includes main filter core assembly 200 and safety filter element assembly 300, and institute's safety filter element is total It is arranged at 300 close to gas outlet 11, and main filter core assembly 200 is between safety filter element assembly 300 and prefilter 100.

Wherein, as shown in figures 10-14, main filter core assembly 200 including main filter core framework 210 and is located at main filter core framework 210 Interior main filter core 220, main filter core 220 are single flow cellular filter core, can be designed so that main filter core assembly 200 same outer in this way In the case where shape size, it is bigger to compare the main filter element filtering area of tradition, and the design is pre- by the way that air inlet 111 to be set to On filter 100, so that gap is smaller between main filter core 220 and housing main body 1, small installation space, big filtering surface are reached Long-pending effect.

Specifically, 1 and Figure 12, main filter core framework 210 include the first framework 211 and second framework 212 referring to Fig.1, in this way Convenient for the installation of main filter core 220.Wherein, the first framework 211 and second framework 212 can be arranged along the axial direction of main filter core 220, It can be arranged along other directions.It in this present embodiment, can be along the axis of main filter core 220 with the first framework 211 and second framework 212 It is introduced to setting.First framework 211 is provided with flanging 2111 far from one end of second framework 212, and second framework 212 is separate One end of first framework 211 is provided with the main filter core baffle 2121 in grid palisade, and main filter core baffle 2121 and flanging 2111 divide The both ends of main filter core 220 are not fixed, and the first framework 211, close to prefilter 100, second framework 212 is close to safety filter element 320. The first framework 211 and 212 structure of second framework mutually fastened is simple, and is convenient for the installation of main filter core 220, solves traditional The problem that main filter core framework 210 can not be applicable in.Wherein, the junction of the first framework 211 and second framework 212 also uses hot melt adhesive Sealing forms connection ring 260, on the one hand may insure that main filter core 220 forms a firm overall structure, on the other hand may be used also It is entered in main filter core 220 to avoid dust from the junction of the first framework 211 and second framework 212.Also, in the present embodiment In, main filter core framework 210, which is provided with, fastens mounting structure 250 for further connecting the first framework 211 and second framework 212. Wherein fastening mounting structure 250 includes the grab 251 being set in the first framework 211, and is set in second framework 212 Card hole 252, and the wedge surface for facilitating insertion into card hole 252 is provided on grab 251.In other embodiments, screw can also be set 140 and screw hole formed be threadedly coupled or fixture block and card slot etc. other fasten mounting structures 250.Although fastening mounting structure 250 Structure is simple, and cost of manufacture is lower, but the setting for fastening mounting structure 250 significantly improves main 200 entirety of filter core assembly Reliability.

Further, 1 and Figure 13, the first framework 211 are provided with main filter core far from one end of second framework 212 referring to Fig.1 Gusset 2112, main filter core gusset 2112 extend towards the direction far from second framework 212.The setting of main filter core gusset 2112 is mainly just Main filter core 220 is maintained in client, i.e., main filter core assembly 200 is when clearing up internal dust, main filter core gusset 2112 and ground Face or supporter intermittence abut, and knock ash to main filter core assembly 200 to achieve the purpose that cleaning.In this present embodiment, main filter core The section of assembly 200 is kidney-shaped, and two opposite arc-shaped edges are provided with main filter core gusset 2112, in this way design, even if wherein one A main filter core gusset 2112 fails, another main filter core gusset 2112 can still be used when main filter core assembly 200 maintains, and mentions The high service life of main filter core assembly 200.

As shown in Figure 11 and Figure 14, main filter core assembly 200 be additionally provided with for by main filter core assembly 200 from housing main body 1 The main filter core handle 2113 inside taken out, the setting of main filter core handle 2113 facilitate the dismounting of air cleaner assy, convenient for using Air cleaner is maintained at family.Also, main filter core handle 2113 is convexly equipped in the first framework 211 far from second framework 212 One end, and main filter core handle 2113 is engraved structure, and upstream prefilter 100 can be stopped to cross air filtering to avoid handle in this way and entered Into main filter core assembly 200, to reduce the resistance that upstream airflow enters main filter core assembly 200.

Further, referring again to Figure 10 and Figure 12, the outer wall of main filter core framework 210 is provided with main cartridge seal circle, main Cartridge seal circle can be tightly connected with 1 inner wall of housing main body, enter downstream to avoid upstream dust.In this present embodiment, main The outer wall of filter core framework 210 is provided with main cartridge seal circle along axial both ends, i.e., the first framework 211 is far from second framework 212 one end is provided with the first sealing ring 230, and second framework 212 is provided with the second sealing ring far from one end of the first framework 211 240, wherein prefilter 100 of first sealing ring 230 close to upstream, safety filter element assembly of second sealing ring 240 close to downstream 300.The setting of first sealing ring 230 can prevent upstream dust from entering between main filter core assembly 200 and housing main body 1.The The setting of two sealing rings 240 can prevent the dust of the leakage of 212 junction of the first framework 211 and second framework from entering downstream In safety filter element assembly 300.Further, the outer wall of main filter core framework 210 is additionally provided with sealing ring card slot, correspondingly, first It is provided with the first sealing ring card slot in framework 211, the second sealing ring card slot, the first sealing ring 230 are provided in second framework 212 It is placed in the first sealing ring card slot, the second sealing ring 240 is placed in the second sealing ring card slot, can make main filter core in this way Sealing ring can be firmly fixed with specific position in main filter core framework 210 so that main cartridge seal circle and shell master 1 inner wall of body forms reliable sealing, and upstream dust is avoided to enter the phenomenon that downstream even results in engine damage generation.

Further, as seen in figs. 15-17, safety filter element assembly 300 includes safety filter element framework 310 and filters positioned at safety Safety filter element 320 in core framework 310, safety filter element 320 be flat panel cartridge, can be designed so that in this way safety filter element 320 with The main filter core assembly 200 of cellular filter core cooperates, so that filter core assembly in the case where same outer dimension, compares biography Filter core assembly filter area of uniting is bigger.

As shown in figs. 18-21, safety filter element framework 310 includes the safety filter element baffle 311 in grid palisade and is set to One end of side wall 312 on safety filter element baffle 311, safety filter element 320 is contacted with safety filter element baffle 311, safety filter element 320 Side wall 312 coated by the side wall 312 of safety filter element framework 310, structure is simple, and easy for installation.And safety filter element baffle 311 towards gas outlet 11, and side of the side wall 312 far from safety filter element baffle 311 is Open architecture, when air-flow is total from main filter core When entering safety filter element assembly 300 at 200, Open architecture can reduce the resistance that air-flow enters safety filter element 320, separately It is outer not only to play the role of fixed safety filter element 320 in the safety filter element baffle 311 of grid palisade, while air-flow can also be made It passes through and is discharged from gas outlet 11.

The junction of 9 and Figure 20 referring to Fig.1, side wall 312 and safety filter element baffle 311 is provided in grid-like connection knot Structure, which is formed by multiple L-type grids, and safety filter element sealing ring 330 is provided at connection structure, and safety filter element is close Seal 330 can be tightly connected with 1 inner wall of housing main body.Wherein safety filter element sealing ring 330 is foamed by PU glue and is formed, in grid-like Connection structure convenient for the foaming of PU glue, so that the side of PU glue contact sealing with safety filter element 320, other side energy and safety filter element The connection sealing of baffle 311.Preferably, safety filter element baffle 311 is provided with rib 340, rib 340 away from the side of side wall 312 It is contacted with safety filter element sealing ring 330, can prevent the foaming of PU glue from overflowing in this way.

Referring to Figure 21, safety filter element assembly 300 is additionally provided with for taking safety filter element assembly 300 out of housing main body 1 Safety filter element handle 314 out, and safety filter element handle 314 is arcuate structure, meets ergonomics.Safety filter element handle 314 It is set to side of the side wall 312 far from safety filter element baffle 311, wherein safety filter element handle 314 is as far as possible far from safety filter element 320 Middle position, safety filter element handle 314 can be reduced as far as possible in this way to the resistance of upstream airflow.Meanwhile safety filter element handle Hand 314 can also be engraved structure, the air filtering of crossing of the main filter core assembly 200 in upstream can be stopped to enter peace to avoid handle in this way In full filter core assembly 300, to reduce the resistance that upstream airflow enters safety filter element assembly 300.Further, safety filter element The not set baffle arrangement in grid palisade in position of the corresponding safety filter element handle 314 of baffle 311.The design not only can reduce Gas-flow resistance, and convenient for including safety filter element handle 314 safety filter element framework 310 can integrated injection molding, add Work is convenient, and cost is relatively low, while being also avoided that the phenomenon broken to 320 hook of safety filter element.

In addition, side wall 312 is additionally provided with safety filter element muscle far from the side of safety filter element baffle 311 referring again to Figure 21 Plate 313, safety filter element gusset 313 extend towards the direction far from safety filter element baffle 311.In this present embodiment, side wall 312 is waist Shape ring, the opposite two sides of side wall 312 are provided with safety filter element gusset 313.The setting of the safe gusset on the one hand can be convenient for peace Full filter core 320 carries out knocking ash when maintaining, and in addition multiple safety filter element gussets 313 can also be abutted with main filter core framework 210, it is ensured that peace Filter core assembly 300 is circumferentially fixed entirely.

In addition, housing main body 1 is disposed with towards 11 direction of gas outlet along its own axis referring again to Fig. 3-Fig. 5 One clamping portion, the second clamping portion and third clamping portion, wherein the first clamping portion and prefilter housing main body 110 are clamped, the second card Second sealing ring 240 of socket part and safety filter element assembly 300 cooperates, and the safety of third clamping portion and safety filter element assembly 300 is filtered Core sealing ring 330 cooperates.It is to be understood that, the housing main body 1 of air filtering core device assembly can be using in the prior art herein It is provided with the housing main body of air inlet, to save the installation of prefilter 100.

Obviously, the above embodiments of the present invention is used for the purpose of clearly illustrating examples for clearly illustrating the present invention, and It is not limitations of the embodiments of the present invention.For those of ordinary skill in the art, in above description On the basis of can also make other variations or changes in different ways.There is no need and unable to give all embodiments Exhaustion.Any modifications, equivalent replacements, and improvements made within the spirit and principle of the present invention etc., should be included in Within the protection scope of the utility model claims.

Claims (10)

1. a kind of main filter core assembly (200), which is characterized in that including main filter core framework (210) and be located at the main filter core framework (210) the main filter core (220) in, wherein main filter core framework (210) includes the first framework (211) that can mutually fasten and the second frame Body (212), and the main filter core (220) is single flow cellular filter core.

2. main filter core assembly (200) according to claim 1, which is characterized in that the main filter core framework (210) is provided with For connecting the fastening mounting structure (250) of first framework (211) and the second framework (212).

3. main filter core assembly (200) according to claim 2, which is characterized in that the fastening mounting structure (250) includes The grab (251) being set on first framework (211), and the card hole being set on the second framework (212) (252), and on the grab (251) it is provided with the wedge surface for facilitating insertion into the card hole (252).

4. main filter core assembly (200) according to claim 1, which is characterized in that first framework (211) and described The junction of two frameworks (212) seals to form connection ring (260) using hot melt adhesive.

5. main filter core assembly (200) according to claim 1, which is characterized in that first framework (211) is far from described One end of second framework (212) is provided with flanging (2111), and the second framework (212) is far from first framework (211) One end is provided with the main filter core baffle (2121) of grid grid structure, the main filter core baffle (2121) and the flanging (2111) point The both ends of the main filter core (220) are not fixed.

6. main filter core assembly (200) according to claim 1, which is characterized in that first framework (211) is far from described One end of second framework (212) is provided with main filter core gusset (2112), and the main filter core gusset (2112) is towards far from described second The direction of framework (212) extends.

7. main filter core assembly (200) according to claim 1, which is characterized in that the main filter core assembly (200) also sets up There is main filter core handle (2113).

8. main filter core assembly (200) according to claim 7, which is characterized in that main filter core handle (2113) projection In the one end of first framework (211) far from the second framework (212), and the main filter core handle (2113) is hollow out knot Structure.

9. main filter core assembly (200) according to claim 1, which is characterized in that the outer wall of the main filter core framework (210) The both ends axial along it are provided with main cartridge seal circle.

10. a kind of air cleaner assy, including housing main body (1) and the safety filter element being set in the housing main body (1) Assembly (300), and gas outlet (11) are provided on the housing main body (1), which is characterized in that it further include that claim 1-9 appoints Main filter core assembly (200) described in meaning one, wherein the main filter core assembly (200) is set to the safety filter element assembly (300) side, air-flow successively pass through the main filter core assembly (200), the safety filter element assembly (300) and the gas outlet (11) air cleaner assy is discharged.