阅读说明：本技术 一种空滤器及具有该空滤器的发动机 (Empty filter and have engine of this empty filter ) 是由 曾勇 秦金菊 曾虎子 杨二车扎石 黄露 何魏 于 2020-07-20 设计创作，主要内容包括：本发明公开了一种空滤器及具有该空滤器的发动机,上述空滤器包括容纳有滤芯的壳体,壳体设有进风口与排灰装置,壳体的内壁在进风口与排灰装置之间设有连续的、呈螺旋状的螺旋滑槽,螺旋滑槽的一端与进风口平滑相连。在螺旋风的离心力作用,空气中较重的颗粒物将被集中甩在螺旋滑槽内,并沿着螺旋滑槽的螺旋方向移动,朝排灰装置行进,从而改变传统技术中因粉尘分散而不利于其收集、排出的弊端,从而减轻滤芯的过滤压力,延长空滤器的使用寿命和保证其使用性能。具有上述空滤器的发动机稳定性好。(The invention discloses an air filter and an engine with the air filter, wherein the air filter comprises a shell for accommodating a filter element, the shell is provided with an air inlet and an ash discharge device, a continuous spiral chute in a spiral shape is arranged on the inner wall of the shell between the air inlet and the ash discharge device, and one end of the spiral chute is smoothly connected with the air inlet. At the centrifugal force effect of spiral wind, heavier particulate matter will be concentrated in the air and get rid of in the spiral chute to remove along the spiral direction of spiral chute, march towards the ash discharging device, thereby change and be unfavorable for its collection, discharged drawback because of the dust dispersion among the traditional art, thereby alleviate the filter pressure of filter core, the life of the empty filter of extension and guarantee its performance. The engine having the air filter has good stability.)

1. The utility model provides an empty filter, is including the casing that holds filter core (3), the casing is equipped with air intake (22) and arranges grey device, its characterized in that, the inner wall (23) of casing are in air intake (22) with arrange grey device between be equipped with continuous, be spiral helicine spiral chute (24), the one end of spiral chute (24) with air intake (22) level and smooth linking to each other.

2. The air filter according to claim 2, wherein the pitch of the spiral chute (24) decreases from the connection with the air inlet (22) to the dust exhaust device.

3. The air filter according to claim 1 or 2, wherein the inner wall (23) of the housing, except for the spiral chute (24), is in the shape of an inverted cone with a cross section that is tapered from the air inlet (22) to the dust discharging device.

4. An air filter according to claim 3, wherein the air inlet (22) is arranged in a tangential direction of the housing.

5. An air filter according to claim 3, wherein the groove shape of the spiral chute (24) is an arc chute (240) or a T chute (241) of a T shape.

6. The air filter according to claim 1 or 2, characterized in that the housing comprises a housing main body (2) for accommodating the filter element (3), and a housing seat (1) connected to a lower end of the housing main body (2), the housing seat (1) comprises a support plate (12) connected with the housing main body (2) in a sealing manner for supporting the filter element (3), the support plate (12) is provided with a second chute (124) at a periphery of the filter element (3) with a depth increasing along a rotation direction thereof, the rotation direction of the second chute (124) is the same as that of the spiral chute (24), and a secondary ash discharging part (123) is arranged at a tail end of the second chute (124).

7. The air filter according to claim 6, wherein the air inlet (22) is disposed at an end of the housing body (2) far away from the housing base (1), and the ash discharging device is disposed at an end of the housing body (2) close to the housing base (1).

8. The air filter according to claim 7, characterized in that the support plate (12) is provided with a plurality of positioning notches (122) at the connection part with the housing main body (2), and the housing main body (2) is provided with at least one positioning protrusion (290) which is matched and connected with the positioning notches (122).

9. The air filter according to claim 1 or 2, characterized in that said housing comprises a housing body (2) for housing said filter element (3), and a housing seat (1) connected to a lower end of said housing body (2), said housing seat (1) comprising a support plate (12) sealingly connected to said housing body (2) for supporting said filter element (3), said ash discharge means being provided on said support plate (12).

10. An air filter according to claim 9, characterized in that the support plate (12) is provided, at the periphery of the filter element (3), with a second chute (124) having a depth increasing along the spiral direction thereof, the spiral direction of the second chute (124) being the same as the spiral direction of the spiral chute (24), and the ash discharge means is provided at the end of the second chute (124).

11. An air filter according to claim 1 or 2, characterized in that the air intake end of the air intake (22) is detachably connected with one of attachment of a coarse filter (4), a remote air pipe or a cyclone separator (6).

12. The air filter according to claim 11, wherein the cyclone separator (6) is detachably connected to the air inlet end of the air inlet (22), the rotary separator comprises a separator cover (61) provided with an air inlet channel, the air inlet channel is a spiral channel (613) which is rotatably arranged, and the spiral channel (613) has the same rotation direction as that of the cyclone member (62) of the rotary separator, so that the airflow forms a cyclone airflow in the separator cover (61) in advance.

13. The air filter according to claim 12, wherein the dust discharging device comprises a dust discharging port (25) and a dust discharging valve (26), the dust discharging port (25) extends along a tangential direction of the housing and is formed as a tubular outlet on the housing, and the dust discharging valve (26) is connected to a distal end of the dust discharging port (25).

14. An engine comprising a carburettor (20), characterised in that the engine further comprises an air filter (10) as claimed in any one of claims 1 to 13, the air outlet (27) of the air filter (10) being connected to the air inlet of the carburettor (20).

Technical Field

The invention relates to the technical field of engine structures, in particular to an air filter. The invention also relates to an engine with the air filter.

Background

When the internal combustion engine is used in a place with much environmental dust, the heavier dust particles in the internal combustion engine are separated in advance in an air filter shell by a cyclone separation technology so as to remove large-particle dust in the air.

However, the existing cyclone separation technology has the following problems: in the whole stroke section from air inlet to ash discharge, the flowing speed of the air flow is gradually attenuated, so that the moving speed of the separated heavier dust is reduced when the separated heavier dust reaches the position near an ash discharge port, and the heavier dust is dispersed after being thrown to the inner wall of the shell of the air filter under the action of cyclone centrifugal force and is not beneficial to dust collection and discharge, so that the dust accumulation can be caused in the ash discharge section, the timely discharge of the dust is influenced, and even part of the separated dust can be re-lifted along with the cyclone to be attached to the surface of the filter element, thereby influencing the service performance and the service life of the filter element.

Therefore, how to solve the problem that the dust is dispersed after being thrown to the inner wall of the shell of the air filter and is not beneficial to dust collection and discharge is a problem to be solved urgently by the technical personnel in the field.

Disclosure of Invention

In view of the above, the present invention provides an air filter, which can collect dust separated by cyclone timely and accelerate the dust along a fixed and continuous channel, so as to discharge the dust more quickly and avoid the dust from flying again.

Another object of the present invention is to provide an engine having the above air cleaner.

In order to achieve the above purpose, the invention provides the following technical scheme:

the utility model provides an empty filter, is including the casing that holds the filter core, the casing is equipped with air intake and ash discharge device, the inner wall of casing is in the air intake with be equipped with continuous, be spiral helicine spiral chute between the ash discharge device, the one end of spiral chute with the air intake is level and smooth to be linked to each other.

Preferably, the screw pitch of the spiral chute decreases gradually from the connection part with the air inlet to the ash discharge device and/or the cross section of the spiral chute decreases gradually from the connection part with the air inlet to the ash discharge device.

Preferably, the inner wall of the casing, except the spiral chute, is in an inverted cone shape with a gradually reduced cross section from the air inlet to the ash discharge device.

Preferably, the air inlet is arranged along the tangential direction of the shell.

Preferably, the groove of the spiral chute is a fan-shaped arc chute or a T-shaped chute.

Preferably, the casing includes the shell main part that is used for holding the filter core and connects in the shell seat of shell main part lower extreme, the shell seat include with shell main part sealing connection, be used for supporting the backup pad of filter core, the backup pad is in the periphery of filter core is equipped with the degree of depth along its spiral direction second spout that increases progressively, the spiral direction of second spout with the spiral chute revolve to the same, the end of second spout is equipped with secondary dust discharging portion.

Preferably, the air inlet is formed in one end, far away from the shell base, of the shell main body, and the ash discharge device is arranged at one end, close to the shell base, of the shell main body.

Preferably, the supporting plate is provided with a plurality of positioning notches at the connection part with the shell, and the shell is provided with at least one positioning protrusion in fit connection with the positioning notches.

Preferably, the casing includes the shell main part that is used for holding the filter core, and connect in the shell seat of shell main part lower extreme, the shell seat include with shell main part sealing connection, be used for supporting the backup pad of filter core, the ash discharging device set up in on the backup pad.

Preferably, the support plate is provided with a second chute with the depth increasing along the rotating direction of the support plate at the periphery of the filter element, the rotating direction of the second chute is the same as the rotating direction of the spiral chute, and the ash discharging device is arranged at the tail end of the second chute.

Preferably, the air inlet end of the air inlet is detachably connected with an attachment of one of a coarse filter, a remote air pipe or a cyclone separator.

Preferably, the cyclone separator is detachably connected to an air inlet end of the air inlet, the rotary separator comprises a separator cover provided with an air inlet channel, the air inlet channel is a spiral channel which is rotatably arranged, and the rotating direction of the spiral channel is the same as that of a cyclone component of the rotary separator, so that airflow forms cyclone airflow in the separator cover in advance.

Preferably, the ash discharging device comprises an ash discharging port and an ash discharging valve, the ash discharging port extends along the tangential direction of the shell and is formed into a tubular outlet on the shell, and the ash discharging valve is connected to the tail end of the ash discharging port.

An engine comprising a carburettor, the engine further comprising an air filter as claimed in any one of the preceding claims, the air outlet of the air filter being connected to the air inlet of the carburettor.

When the air filter provided by the invention works, air in the environment is sucked into the shell from the air inlet along the tangential direction and rotates on the inner wall of the shell, and because the continuous spiral chute is arranged on the inner wall of the shell, under the action of the centrifugal force of spiral air, heavier particles in the air are intensively thrown into the spiral chute and move along the spiral direction of the spiral chute to move towards the ash discharging device, so that the defect that the collection and the discharge of the air are not facilitated due to the dust dispersion in the traditional technology is overcome.

In addition, when the air moves spirally along the spiral chute, the air can be filled into the spiral chute under the action of centrifugal force, the air can generate extrusion force under the limitation of the spiral chute, the extrusion force can push heavier particles received in the chute to advance along the spiral at an accelerated speed until the heavier particles reach the ash discharging device, and the heavier particles are quickly discharged out of the shell from the ash discharging device, so that the defects that the heavier particles such as dust can be accumulated and re-raised in the traditional technology are overcome. Generally, this scheme can make the heavier particulate matter of cyclone separation as much as possible, discharge outside empty filter as fast as possible to alleviate the filter pressure of filter core, prolong the life of empty filter and guarantee its performance.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the provided drawings without creative efforts.

FIG. 1 is a schematic illustration of a front view of an embodiment of an engine provided by the present invention;

FIG. 2 is a schematic illustration of a top view of an embodiment of an engine provided by the present invention;

FIG. 3 is a schematic diagram of an embodiment of an air filter provided in the present invention;

FIG. 4 is a schematic partial cross-sectional view of an embodiment of an air filter provided in the present invention;

FIG. 5 is an exploded schematic view of the hollow filter of FIG. 3;

FIG. 6 is a schematic view of the housing of the hollow filter of FIG. 3 at another angle;

FIG. 7 is a schematic view of a support plate in a housing seat of the hollow filter of FIG. 3;

FIG. 8 is a partial cross-sectional view of another embodiment of an air filter;

FIG. 9 is a schematic view of the housing of the hollow filter of FIG. 8 at another angle;

FIG. 10 is a cross-sectional view of a strainer;

FIG. 11 is a schematic view of the connection head of the remote air tube;

FIG. 12 is a schematic view of a cyclone separator;

FIG. 13 is an exploded schematic view of the cyclone separator of FIG. 12;

FIG. 14 is a schematic view of another angle of the separator cover of the cyclone separator of FIG. 12;

FIG. 15 is another angular schematic view of the separator cup of the cyclone separator of FIG. 12.

Wherein, 10 is an air filter, 20 is a carburetor, 30 is an engine main body, 40 is a starter, 50 is an oil tank, and 60 is a silencer;

1 is a shell seat, 2 is a shell main body, 3 is a filter element, 4 is a coarse filter, 5 is a connector, and 6 is a cyclone separator;

11 is a shell seat main body, 12 is a support plate, 120 is a support sealing part, 121 is a transition air inlet part, 122 is a positioning notch, 123 is a secondary ash discharge part, and 124 is a second sliding chute;

21, a locking nut, 22, an air inlet, 220, an air inlet connecting part, 23, an inner wall, 24, a spiral chute, 240, an arc chute, 241, a T-shaped chute, 25, a dust discharging port, 250, a dust discharging connecting part, 26, a dust discharging valve, 27, an air outlet, 28, a shell end wall, 280, a mounting hole, 29, a shell mounting part and 290, wherein the locking nut is arranged on the shell;

31 is a first end, 32 is a second end; a coarse filter 41 and a coarse filter connecting part 42; 51 connecting the head connecting part; 61 is a separator cover, 62 is a cyclone component, 63 is a separator cup;

610 is the separator air outlet, 611 is the buckle, 612 is the separator air inlet, 613 is the helical passage, 614 is the air outlet transition connecting portion, 615 is the deflector, 620 is the ventilation pipe, 621 is the flabellum, 622 is the separator filter screen subassembly, 623 is the whirlwind component connecting portion, 630 is the separator air inlet filter piece, 631 is the separator cup connecting portion, 632 is the separator ash hole.

In addition, f is a rotational traveling direction of the air flow in the housing, and h is a rotational traveling direction of the air flow on the support plate.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

The core of the invention is to provide an air filter, which can collect dust separated by cyclone timely and accelerate the dust along a fixed and continuous channel, thereby discharging the dust more quickly and avoiding the dust from flying again.

Another core of the present invention is to provide an engine having the above air cleaner.

Referring to fig. 1 to 15, fig. 1 is a front view schematically illustrating an embodiment of an engine according to the present invention; FIG. 2 is a schematic illustration of a top view of an embodiment of an engine provided by the present invention; FIG. 3 is a schematic diagram of an embodiment of an air filter provided in the present invention; FIG. 4 is a schematic partial cross-sectional view of an embodiment of an air filter provided in the present invention; FIG. 5 is an exploded schematic view of the hollow filter of FIG. 3; FIG. 6 is a schematic view of the housing of the hollow filter of FIG. 3 at another angle; FIG. 7 is a schematic view of a support plate in a housing seat of the hollow filter of FIG. 3; FIG. 8 is a partial cross-sectional view of another embodiment of an air filter; FIG. 9 is a schematic view of the housing of the hollow filter of FIG. 8 at another angle; FIG. 10 is a cross-sectional view of a strainer; FIG. 11 is a schematic view of the connection head of the remote air tube; FIG. 12 is a schematic view of a cyclone separator; FIG. 13 is an exploded schematic view of the cyclone separator of FIG. 12; FIG. 14 is a schematic view of another angle of the separator cover of the cyclone separator of FIG. 12; FIG. 15 is another angular schematic view of the separator cup of the cyclone separator of FIG. 12.

The air filter provided by the invention comprises a shell for accommodating a filter element 3, wherein the shell is provided with an air inlet 22 and an ash discharge device, a continuous spiral chute 24 which is in a spiral shape is arranged on the inner wall 23 of the shell between the air inlet 22 and the ash discharge device, and one end of the spiral chute 24 is smoothly connected with the air inlet 22.

Wherein, filter core 3 can be cylindric filter core 3, and filter core 3 includes the filtering material and the hollow passageway of ventilating of cyclic annular setting, and one end of filter core 3 is sealed completely, and the second end 32 that is equipped with the centre bore that filter core 3 other end seals for communicating with hollow passageway of ventilating.

The casing includes shell main part 2 and shell seat 1, and filter core 3 holds in shell main part 2, and is specific, shell main part 2 can be formed by two parts that the axial divide into connect, for example the welding, and shell main part 2 is cylindricly in addition to the part of helical channel 613, and air intake 22 is used as the passageway that the air in the environment got into the casing, and the dust exhaust device sets up the one end of keeping away from air intake 22 to make full use of the acceleration effect of helical channel 613, and the dust exhaust device is used for collecting heavier particulate matter and through it gets rid of the heavier particulate matter outside the casing.

The inner wall 23 of the casing is provided with a continuous spiral chute 24 between the air inlet 22 and the ash discharging device, namely, the inner wall 23 of the casing is provided with a continuous spiral chute 24 between the air inlet 22 and the ash discharging device, one end of the spiral chute 24 is smoothly connected with the air inlet 22, and the other end of the spiral chute 24 is smoothly connected with the ash discharging device, so that heavier particles spirally move along the spiral chute 24 and are conveyed to the ash discharging device through the spiral chute 24.

During operation, the air in the environment is sucked into the shell from the air inlet 22 along the tangential direction, and rotates on the inner wall 23 of the shell, and due to the fact that the continuous spiral chute 24 is arranged on the inner wall 23 of the shell, under the action of the centrifugal force of spiral air, heavier particles in the air are thrown into the spiral chute 24 in a concentrated mode, move along the spiral direction of the spiral chute 24 and move towards the ash discharging device, and therefore the defect that collection and discharge of the air are not facilitated due to dust dispersion in the traditional technology is overcome.

In addition, when the air moves spirally along the spiral chute 24, the air can be filled into the spiral chute 24 under the action of centrifugal force, and the air can generate extrusion force under the limitation of the spiral chute 24, so that the extrusion force can push the heavier particles received in the chute to advance along the spiral in an accelerated way until reaching the ash discharging device and be quickly discharged out of the shell from the ash discharging device, and the defect that the heavier particles such as dust can be accumulated and re-raised in the prior art is overcome. Generally, this scheme can make the heavier particulate matter of cyclone separation as much as possible, discharge outside empty filter 10 as fast as possible to alleviate the filter pressure of filter core 3, prolong the life of empty filter 10 and guarantee its performance.

On the basis of the above-described exemplary embodiments, it is preferable if the pitch of the spiral chute 24 decreases from the connection with the air inlet 22 to the ash discharge device and/or if the cross section of the spiral chute 24 decreases from the connection with the air inlet 22 to the ash discharge device.

In this embodiment, the pitch of the spiral chute 24 is set to be gradually decreased from the connection with the air inlet 22, so that the whirlwind flow spirally moving in the spiral chute 24 generates an axial pressing force to the ash discharging device as a whole, and the whirlwind flow is accelerated toward the ash discharging device in the spiral chute 24.

Also, the sectional area of the spiral chute 24 is gradually reduced from the connection with the air inlet 22, so that the cyclone flow in the spiral chute 24 generates a pressing force in a spiral direction, thereby accelerating the cyclone flow from another angle toward the ash discharging device. At least one of the two modes can accelerate the flow speed of the cyclone flow in the spiral chute 24, and the two modes have more obvious effect after being superposed, so that heavier particles are pushed to rapidly advance along the spiral chute 24 to reach the ash discharging device and be discharged out of the shell.

On the basis of the above-described exemplary embodiments, the inner wall 23 of the housing, in addition to the spiral chute 24, preferably has an inverted conical shape with a tapering cross section from the inlet opening 22 to the dust removal device.

In this embodiment, in order to further accelerate the flow speed of the cyclone flow in the spiral chute 24, the inner wall 23 of the casing is disposed in an inverted cone shape from the air inlet 22 to the ash discharging device, and the purpose of the present embodiment is to generate an axial pressing force on the cyclone flow, so as to push the heavier particles in the spiral chute 24 to slide and be discharged to the ash discharging device.

On the basis of the above embodiment, in order to ensure that the air enters the casing from the air inlet 22 and forms a cyclone flow rapidly, the air inlet 22 is preferably arranged along a tangential direction of the casing.

On the basis of the above-described embodiment, in consideration of the specific shape arrangement of the spiral chute 24, it is preferable that the spiral chute 24 is an arc chute 240 having a fan-shaped chute section or a T-shaped chute 241 having a T-shape. Of course, the shape of the spiral chute 24 may also be other configurations, such as a semi-oval shape, etc.

On the basis of the above-mentioned embodiment, as a preference, the housing includes a housing main body 2 for accommodating the filter element 3, and a housing base 1 connected to a lower end of the housing main body 2, the housing base 1 includes a support plate 12 sealingly connected to the housing main body 2 for supporting the filter element 3, the support plate 12 is provided at a periphery of the filter element 3 with a second chute 124 having a depth increasing along a rotation direction thereof, the rotation direction of the second chute 124 is the same as that of the spiral chute 24, and a terminal end of the second chute 124 is provided with a secondary dust discharge portion 123.

The casing includes shell main part 2 and connects in shell seat 1 of shell main part 2, has held filter core 3 in the shell main part 2, and filter core 3 is cylindric, and filter core 3 is including the filtering material and the hollow passageway of ventilating of cyclic annular setting, and the one end of filter core 3 is sealed to be the first end 31 of filter core 3, and the other end seals for with hollow passageway intercommunication of ventilating, is equipped with the second end 32 of the filter core 3 of centre bore, and the one end of shell main part 2 is shell end wall 28, and the other end is the opening end of being connected with shell seat 1.

The shell base 1 is composed of a shell base main body 11 and a support plate 12 connected to the shell base main body in a sealing mode, the support plate 12 and the shell base main body 11 can be connected in a sealing mode through welding or other modes, a tubular transition air inlet portion 121 is formed in the support plate 12, and a support sealing portion 120 matched with the end portion of the filter element 3 is formed along the periphery of the transition air inlet portion 121. The shell base main body 11 is provided with an air outlet 27 communicated with the transition air inlet portion 121 on the support plate 12, and the shell base main body 11 is further provided with a bolt for fixedly connecting the filter element 3 and the shell main body 2, and the bolt is arranged along the axis of the transition air inlet portion 121.

In this way, the ventilation channel of the filter element 3 passes through the bolt on the housing base main body 11, the bolt simultaneously passes through the first end 31 of the filter element 3, the second end 32 of the filter element 3 is hermetically arranged on the supporting sealing part 120 of the supporting plate 12, specifically, the sealing between the filter element 3 and the supporting plate 12 can be sealed by a radial or/and axial contact part, a sealing gasket and the like can be arranged for sealing, meanwhile, the open end of the housing main body 2 is close to the housing base 1, the bolt passes through the mounting hole 280 on the housing end wall 28, the housing mounting part 29 is matched with the mounting groove on the supporting plate 12, a sealing ring can be arranged in the mounting groove, the locking nut 21 is screwed on the bolt, and the first end 31 of the filter element 3 and the housing end wall 28, the second end 32 of the filter element 3 and the supporting plate 12, and the housing main body 2.

In this embodiment, a spiral second chute 124 is disposed on the support plate 12 around the filter element 3, the second chute 124 is located between the periphery of the filter element 3 and the inner wall 23 of the housing main body 2, the depth of the second chute 124 increases progressively along the rotation direction thereof, the rotation direction of the second chute 124 is the same as the rotation direction of the spiral chute 24, a secondary dust discharging portion 123 is disposed at the end of the second chute 124, and the secondary dust discharging portion 123 is used for discharging dust in the second chute 124 out of the housing. So that the large granular dusts falling on the support plate 12 are rotatably moved along the second chute 124 on the support plate 12 to the sub dust discharge part 123 and discharged from the sub dust discharge part 123 to the outside of the housing.

In general, the ash discharging device is disposed at one end of the housing main body 2 adjacent to the housing base 1, so that most of the heavier particles separated by the cyclone are directly collected and discharged by the ash discharging device, and a small amount of the heavier particles deposited on the periphery of the supporting plate 1212 are transported to the secondary ash discharging portion 123 along with the second chute 124 and discharged, thereby further improving the ash discharging efficiency and effect of the present invention.

On the basis of the above-mentioned embodiment, it is preferable that the air inlet 22 is disposed at an end of the casing main body 2 away from the casing base 1, and the ash discharging device is disposed at an end of the casing main body 2 close to the casing base 1. To ensure that the spiral chute 24 has a sufficient length to better achieve the acceleration effect on the swirling flow. Of course, the air inlet 22 may be disposed at an end of the shell 2 close to the shell base 1, and the ash discharging device may be disposed at an end of the shell 2 far from the shell base 1.

On the basis of the above-mentioned embodiment, in consideration of the specific connection manner of the support plate 12 and the shell main body 2, it is preferable that the support plate 12 is provided with a plurality of positioning recesses 122 at the connection portion with the shell main body 2, and the shell main body 2 is provided with at least one positioning protrusion 290 in fit connection with the positioning recesses 122.

Specifically, the support plate 12 is provided with a positioning notch 122 around the transition air inlet portion 121 for mounting the housing main body 2, and the open end of the housing main body 2 is formed with a positioning protrusion 290 extending in the axial direction. So that the user can fixedly install the housing main body 2 at different angles according to actual needs, for example, make the air inlet 22 of the housing main body 2 at an angle with less particles in the air, or facilitate the connection of attachments, such as a remote air pipe, the cyclone separator 6, etc., to the air inlet 22.

On the basis of the above embodiment, it is preferable that the tip end of the spiral chute 24 is located directly above the start end of the second chute 124 in the axial direction of the case main body 2.

In this embodiment, the end of the spiral chute 24 is disposed to meet the start of the second chute 124, so that the second chute 124 receives the dust falling from the spiral chute 24 and discharges the dust to the secondary dust discharge portion 123, and the end of the chute is disposed above the start of the second chute 124, thereby making full use of the spiral function of the second chute 124.

On the basis of the above-described embodiment, it is preferable that the housing includes a housing main body 2 for accommodating the filter element 3, and a housing base 1 attached to a lower end of the housing main body 2, the housing base 1 includes a support plate 12 sealingly attached to the housing main body 2 for supporting the filter element 3, and the ash discharging device is provided on the support plate 12. That is, in the embodiment, the ash discharging device is disposed on the supporting plate 12 of the shell base 1, so that the ash discharging device does not occupy too much extra space, and is beneficial to miniaturization.

On the basis of the above-mentioned embodiment, it is preferable that the support plate 12 is provided with a second chute 124 at the periphery of the filter element 3, the depth of which increases along the turning direction thereof, the turning direction of the second chute 124 is the same as that of the spiral chute 24, and the dust discharging device is provided at the end of the second chute 124. That is, in the present embodiment, the ash discharge device is disposed on the base of the support plate 12, and the second chute 124 is disposed on the support plate 12 to improve the efficiency of ash discharge.

On the basis of the above-described embodiment, it is preferable that an air intake end of the air intake opening 22 is detachably connected with an attachment of one of the coarse filter 4, the remote air pipe, or the cyclone 6.

In the embodiment, in order to increase the degree of freedom when the user uses the engine in different environments, for example, when the engine is used in an environment with large dust, the user may configure the cyclone separator 6 to perform pre-dust removal; alternatively, when the engine is used as power for a working mechanism having a long handrail, such as a mini tiller, the user may configure the remote air duct to introduce cleaner air at the handrail into the housing body 2.

Specifically, the strainer 4 is provided with a strainer 41 on the air intake side, and a strainer connecting portion 42 that is fitted to the air intake connecting portion 220 on the casing main body 2 is provided on the air outlet side. As shown in fig. 11, one end of the connector 5 of the remote air tube is provided with a connector connection portion 51 that is engaged with the air inlet 22 of the housing main body 2, in this embodiment, the remote air tube can be connected with the connector 5 by a screw mosquito, and of course, other methods, such as a sleeving manner and a clamping manner, can be used.

On the basis of the above-mentioned embodiment, it is preferable that the cyclone separator 6 is detachably connected to the air inlet end of the air inlet 22, the rotating separator includes a separator cover 61 provided with an air inlet channel, the air inlet channel is a spiral channel 613 rotatably arranged, and the spiral channel 613 is rotated in the same direction as the cyclone member 62 of the rotating separator, so that the airflow is formed into a cyclone airflow in advance in the separator cover 61.

The cyclone separator 6 comprises a separator housing formed by a separator cover 61 and a separator cup 63, a cyclone member 62 accommodated and coaxially supported in the separator housing, a ventilation pipe 620 at the center of the cyclone member 62, blades 621 which are close to the end of the ventilation pipe 620 and radially extend outwards along the periphery thereof to form a uniform inclination angle according to a preset angle, a separator screen assembly 622 below the blades 621, and a cyclone member connecting part 623 formed at the outer end of the blades 621 and in supporting fit with the separator cup 63.

The cyclone separator 6 further comprises a separator air inlet 612, a separator ash outlet 632 and a separator air outlet 610, wherein the separator ash outlet 632 is used for collecting and/or discharging the heavier particles separated by the cyclone separator to the outside of the separator shell; the separator outlet 610 is a tubular passage extending from the intersection of the separator lid 61 and the axis of the separator housing.

The separator air outlet 610 extends out of the separator housing and forms a separator air outlet connection port at an air outlet end, the separator air outlet 610 is connected with the air inlet 22 of the air filter 10 in a matched manner, and specifically, the separator air outlet 610 is connected with the air inlet 22 of the air filter 10 in a clamping manner through a buckle 611. The separator air inlet 612 extends inwards along the separator axis to form an air outlet transition connecting portion 614, and the air outlet transition connecting portion 614 is connected with the ventilation pipe 620 of the cyclone component 62 in a matching mode. Specifically, the separator inlet 612 may be disposed along a tangential direction of the separator cover 61, and the separator inlet 612 is provided with a separator inlet filter 630.

An air inlet channel is formed between the separator air inlet 612 and the air outlet transition connecting portion 614 inside the separator cover 61, and the air inlet channel is spirally arranged along the periphery of the cyclone member 62, so that before air enters the cyclone member 62, cyclone airflow is formed in the separator cover 61 in advance, and the separation effect of the cyclone separator 6 is improved. Specifically, the separator inlet 612 is provided with a spiral guide plate 615, and the spiral guide plate 615 forms a spiral channel 613.

The separator inlet 612 may be configured to provide a downward air inlet structure, and opposite to the separator inlet 612, a separator inlet filter portion is formed along the upper edge of the separator cup 63, and the separator inlet filter portion may be in a mesh shape or in other forms, and is mainly responsible for coarse filtration. The separator cup 63 is generally inverted cone shaped to facilitate the cyclone separation of heavier particles sliding and collecting toward the bottom of the cup.

At least one separator ash outlet 632 is provided in at least one of the side walls or bottom wall of the separator cup 63. In this embodiment, the two separator outlets 632 are symmetrically arranged, each separator outlet 632 is configured to protrude into the cup, and is formed on the sidewall in an elongated shape from the bottom of the cup to the top, and each elongated separator outlet 632 is preferably inclined to one side of the airflow by a predetermined angle. An upper separator cup coupling portion 631 of the separator cup to be coupled with the separator cover 61.

In addition to the above-mentioned embodiments, considering the specific arrangement of the ash discharging device, as a preferred mode, the ash discharging device includes an ash discharging port 25 and an ash discharging valve 26, the ash discharging port 25 extends along the tangential direction of the casing and is formed as a tubular outlet on the casing, and the ash discharging valve 26 is connected to an ash discharging connection part 250 at the end of the ash discharging port 25.

In addition to the air filter, the present invention also provides an engine comprising a carburetor 20, the engine further comprising any one of the air filters 10 described above, the air outlet 27 of the air filter 10 being connected to the air inlet of the carburetor 20.

As shown in fig. 1 or 2, the engine includes:

the engine body 30 is composed of a crankcase, a cylinder block connected with the crankcase, a cylinder head arranged on the cylinder block, and corresponding mechanisms such as a crankshaft, a connecting rod, a piston, an intake valve and an exhaust valve.

A starter 40, wherein the starter 40 is a hand-pulled starter 40 and is arranged on an air guide cover which is positioned at one end of the crankshaft and used for guiding cooling air; and a fuel tank 50 provided above the engine body 30 and supplying fuel to the engine.

The air filter can collect heavier particles in time through cyclone separation and accelerate along a fixed and continuous channel before the air is filtered by the filter element 3 and then discharge the heavier particles, and then the filter element 3 further filters the air, and clean air obtained after the air is processed is provided to the carburetor 20 which is arranged at a proper position of the engine main body 30.

And a carburetor 20 for mixing fuel from a fuel tank 50 and clean air from an air filter to generate a mixed fuel-air to be supplied to a combustion chamber provided in a cylinder head.

A muffler 60 for discharging exhaust gas generated by the combustion of fuel in the engine and reducing exhaust noise, which is installed at an exhaust port of the cylinder head; of course, the engine also includes other necessary mechanisms, such as a throttle control mechanism and the like, which belong to the prior art and are not described in detail herein.

The air filter 10 may be disposed on the engine, as shown in fig. 1, and the air outlet 27 of the air filter may be directly mounted to the air inlet of the carburetor 20 through the mounting hole 280, or may be disposed in other manners, such as connecting the air outlet 27 with the air inlet of the carburetor 20 through a connecting pipe. The air filter may be disposed in an axis vertical manner as shown in fig. 2, may also be disposed in an axis horizontal manner or may be disposed in other suitable arrangement manners, which is not limited in the present invention.

The embodiments in the present description are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other.

The air filter and the engine having the same according to the present invention are described in detail above. The principles and embodiments of the present invention are explained herein using specific examples, which are presented only to assist in understanding the method and its core concepts. It should be noted that, for those skilled in the art, it is possible to make various improvements and modifications to the present invention without departing from the principle of the present invention, and those improvements and modifications also fall within the scope of the claims of the present invention.