CN218955107U

CN218955107U - Air pre-cleaner

Info

Publication number: CN218955107U
Application number: CN202320606897.7U
Authority: CN
Inventors: 杨传锁; 张全彩
Original assignee: Linyi Qingchuan Machinery Co ltd; Henan Xunbo Machinery Co ltd
Current assignee: Linyi Qingchuan Machinery Co ltd; Henan Xunbo Machinery Co ltd
Priority date: 2023-03-24
Filing date: 2023-03-24
Publication date: 2023-05-02
Anticipated expiration: 2033-03-24

Abstract

The present utility model relates to an air precleaner having a housing extending along a longitudinal axis between a first axial end and a second axial end, the housing providing an inlet for an air flow path at the first axial end; the conical diversion mechanism comprises a conical diversion port arranged at the first axial end part of the shell, and the conical diversion port faces the inner wall of the shell and is used for enabling air to form an outward-diffused flow field and concentrate around the inner wall of the shell; the axial fan is arranged at the downstream of the conical flow guiding mechanism, the first rotational flow mechanism is arranged at the downstream of the axial fan, the fine filter mechanism is arranged at the second axial end part in the shell, a channel which enables air to flow directly or reversely is arranged in the fine filter mechanism, the channel is connected with an outlet of an air flow path arranged on the shell, and at least one dust discharging port is arranged at the second axial end part of the shell and used for discharging dust in the shell. The utility model solves the problems of short service life and poor environmental applicability of the existing air precleaner.

Description

Air pre-cleaner

Technical Field

The present utility model relates generally to the field of air purification technology. More particularly, the present utility model relates to an air precleaner.

Background

The air purification is an integral solution for providing sterilization, disinfection, dust fall, haze removal and the like for various indoor environmental problems, and has important significance for improving the environmental conditions of life, office, driving and the like and improving physical and mental health. Such as ventilation systems, heat exchange systems, air conditioning systems, and internal combustion engine air intake systems, require the use of clean air in different configurations or operating conditions.

The current air purification technology comprises photocatalysis technology, quantitative active oxygen technology, anion technology, HEPA filter screen, active carbon, plant purification technology, grafting macromolecule technology, ecological anion chip generation technology and the like. The purification apparatus used includes a sterilization type, a solid contaminant removal type, and a gaseous contaminant removal type depending on the type of the contaminant. The solid pollutant removing method mainly comprises mechanical filtration, electrostatic dust collection, electrostatic electret, anion and plasma filtration and the like. The solid contaminant removal purifier currently in common use mainly includes an air precleaner. The air pre-cleaner is integrated with various devices to realize direct interception of solid pollutants in the air, electrostatic dust collection and other purification treatments, so that the content of the solid pollutants in the air is reduced, and the damage to human bodies is reduced.

However, drawbacks of the currently known air precleaners include: the service life is short due to the limitation of the use environment. The structure of the air pre-cleaner needs to be customized under specific working conditions, which causes the defects of longer manufacturing time and high production cost, and limits the application and popularization of the air pre-cleaner. In the electric air precleaner, the motor in the cleaner drives the fan, and the direct contact of the motor with the high concentration dust air causes the motor and the fan surface to be easily attached with dust/debris, which may cause the motor to wear out, poor heat dissipation and then to be scrapped in severe cases.

Therefore, how to effectively improve the service life and the environmental applicability of the air pre-cleaner is a problem to be solved.

Disclosure of Invention

In order to solve one or more of the technical problems, the utility model provides a conical flow guide mechanism to enable air to flow along the inner wall of the shell, so that the resistance of the air flowing in the shell can be reduced, dust in the air can be filtered and discharged conveniently, centrifugal separation of the air and impurities is facilitated, damage to a axial fan is reduced, and the service life of the air precleaner is prolonged effectively. Meanwhile, the utility model also provides an air pre-cleaner capable of cleaning impurities in the air.

To this end, the present utility model provides an air precleaner comprising: a housing extending along a longitudinal axis between a first axial end and a second axial end for providing a flow path for air, the housing providing an inlet for the air flow path at the first axial end; the conical diversion mechanism comprises a conical diversion port arranged at the first axial end part of the shell, and the conical diversion port faces the inner wall of the shell and is used for enabling air to form an outward diffusion flow field and concentrate around the inner wall of the shell after entering the shell; an axial fan disposed downstream of the conical flow guide mechanism for pressurizing air entering the housing to direct air from a first axial end to a second axial end of the housing; a first swirling mechanism provided downstream of the axial flow fan for swirling air to separate the air from impurities by centrifugal force; a fine filtering mechanism arranged at the second axial end part in the shell and used for filtering the air passing through the first cyclone mechanism, wherein a channel for enabling the air to flow directly or reversely is arranged in the fine filtering mechanism, and the channel is connected with an outlet of an air flow path arranged on the shell; the second axial end of the housing is provided with at least one dust discharge opening for discharging dust in the housing.

In one embodiment, the fine filter mechanism comprises a filter element arranged between the first swirling mechanism and the second axial end portion for filtering air passing through the first swirling mechanism, the inside of the filter element being provided with the channel.

In one embodiment, the outlet of the air flow path is disposed at a second axial end of the housing or a non-axial end of the housing.

In one embodiment, a rain cap is also included, the rain cap being disposed at or within the first axial end of the housing.

In one embodiment, the housing comprises a first housing, a second housing and a third housing arranged extending along a longitudinal axis, the conical flow guiding mechanism and the axial fan being arranged in the first housing, the second housing being for forming a transition chamber, the swirling mechanism and the fine filter mechanism being arranged in the third housing.

In one embodiment, the first shell, the second shell and the third shell are connected through any one or more of bolts, clamps, threads and buckles.

In one embodiment, the length between the first axial end and the second axial end of the housing is adjustable for adjusting the flow rate and the flow volume of the air.

According to the scheme of the utility model, the conical flow guide mechanism can be arranged at the upstream of the axial flow fan to concentrate air around the inner wall of the shell, so that turbulent flow of the air in the shell is restrained, the middle resistance of the air in the flow of the shell is reduced, the risk of blockage of the pre-cleaner caused by unsmooth dust discharge is effectively reduced, and the service life of the pre-cleaner is prolonged. Furthermore, the air direct-current or reverse-current channels are arranged in the fine filtering mechanism, so that the outlets of the air flow paths can be arranged at different positions, the requirements of different working conditions are met, and the applicability of the air pre-cleaner in different environments is effectively improved. In addition, through setting up rain-proof cap and other structures in this application, enriched this air precleaner's function, can be applicable to under the specific environment like rainfall environment etc..

The present utility model also provides an air precleaner comprising: a housing extending along a longitudinal axis between a first axial end and a second axial end for providing a flow path for air, the housing providing an inlet to the air flow path at the first axial end, a dust exhaust port being provided on a side wall of the housing; an axial fan for pressurizing air entering the housing to direct air from a first axial end to a second axial end of the housing; cyclone dust removing blades rotatably arranged at the upstream of the axial flow fan and used for enabling air to form a cyclone so as to enable impurities in the air to be thrown out of the shell through the dust discharging port under the action of centrifugal force; a first swirling mechanism provided downstream of the axial flow fan for swirling air to separate the air from impurities by centrifugal force; a fine filtering mechanism arranged at the second axial end part in the shell and used for filtering the air passing through the first cyclone mechanism, wherein a channel for enabling the air to flow directly or reversely is arranged in the fine filtering mechanism, and the channel is connected with an outlet of an air flow path arranged on the shell; the second axial end of the housing is provided with at least one dust discharge opening for discharging dust in the housing.

In one embodiment, the cyclone dust removing blades are fixedly installed on the axial flow fan through a rotating shaft, so that the axial flow fan drives the cyclone dust removing blades to rotate.

In one embodiment, the rotating shaft is further provided with rectifying blades.

In one embodiment, the first axial end is provided with a shroud for forming an out-diffusing flow field for air after it enters the housing and is concentrated around the inner wall of the housing.

In one embodiment, the first axial end of the housing is of reduced diameter configuration to reduce the flow rate of air after it has passed through the inlet.

According to the scheme of the utility model, after entering the shell, air can generate rotational flow under the guidance of the cyclone dust removing blades, impurities in the air are discharged from the dust discharging port under the action of centrifugal force, and then the air flows downstream through the axial flow fan. The motor of the axial flow fan is exposed in a high dust environment for a long time, so that dust is accumulated on the surface of the motor, heat dissipation is hindered to influence the performance of the motor, the motor of the axial flow fan can be protected by adding a first-stage filtering system at the upstream of the axial flow fan, and the filtering pressure of a downstream filtering system is reduced.

Drawings

The above, as well as additional purposes, features, and advantages of exemplary embodiments of the present utility model will become readily apparent from the following detailed description when read in conjunction with the accompanying drawings. In the drawings, embodiments of the utility model are illustrated by way of example and not by way of limitation, and like reference numerals refer to similar or corresponding parts and in which:

fig. 1 is a block diagram schematically showing an air precleaner according to embodiment 1 of the utility model;

fig. 2 is a schematic view schematically showing the structure of a through-type air precleaner according to embodiment 2 of the utility model;

fig. 3 is a structural view schematically showing an air precleaner according to embodiment 3 of the utility model;

FIG. 4 is a block diagram of the dust filter assembly of FIG. 3;

FIG. 5 is a perspective view of a axial fan and cyclone dust removal blade of the dust removal filter assembly of FIG. 3;

FIG. 6 is a block diagram of another dust filter assembly;

FIG. 7 is a block diagram of a dust filter assembly of example 4 of the present utility model;

9. a conical flow guide port; 10. an axial flow fan; 12. an outlet; 14. an axial fan harness; 15. sealing the end cover; 16. a fine filtration mechanism; 17. a third housing; 18. a separation chamber; 19. a fourth housing; 20. a first dust discharge port; 21. a blade; 22. a second housing; 23. a rain cap; 24. a first housing; 25. a fifth housing; 26. a sixth housing; 27. a rotation shaft; 28. swirl dust removal blades; 281. a wiper blade; 282. a support rib; 29. a guide cover; 30. a second dust discharge port; 31. a rectifying vane; 32. the bottom end of the arc.

Detailed Description

The following description of the embodiments of the present utility model will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are some, but not all embodiments of the utility model. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

In the foregoing description of the present specification, the terms "fixed," "mounted," "connected," or "connected" are to be construed broadly, unless explicitly stated or limited otherwise. For example, in terms of the term "coupled," it may be fixedly coupled, detachably coupled, or integrally formed; can be mechanically or electrically connected; either directly or indirectly through intermediaries, or in communication with each other or in interaction with each other. Therefore, unless otherwise specifically defined in the specification, a person skilled in the art can understand the specific meaning of the above terms in the present utility model according to the specific circumstances.

Specific embodiments of the present utility model are described in detail below with reference to the accompanying drawings.

Example 1 of an air precleaner provided by the utility model:

fig. 1 is a block diagram schematically illustrating an air precleaner according to an embodiment of the present utility model.

As shown in fig. 1, the air precleaner of the utility model includes a housing, a conical deflector mechanism, an axial fan, a first swirling mechanism, and a fine filter mechanism.

The housing extends along a longitudinal axis between a first axial end and a second axial end. The housing provides an inlet to the air flow path at the first axial end. In some embodiments, the flow path of the air within the housing after entering the housing from the inlet at the first axial end may be direct flow or may be reentrant. The outlet of the air flow path may be provided in the middle of the housing or may be provided in the second axial end of the housing. Those skilled in the art can select appropriate settings according to the requirements of the actual application scenario.

The conical deflector mechanism may comprise a conical deflector disposed at the first axial end of the housing and oriented toward the inner wall of the housing for forming an outwardly diverging flow field for air after it enters the housing and is concentrated around the inner wall of the housing. In some embodiments, the design of the conical flow guide opening can enable the air to form an outward diffusion flow field, and the air passing through the axial flow fan is mainly concentrated around the inner wall of the shell. When components such as an air outlet pipe are arranged in the middle of the shell, the obstruction of the air outlet pipe component to the air flow can be reduced, and the air can flow rapidly in the shell. In an application scenario, the conical flow guide port can change the airflow path of air in the shell, so that the variable-diameter air inlet mode of the air pre-cleaner is realized, and after the air contacts with the axial flow fan, the air rapidly moves downstream along the inner wall of the shell. Furthermore, the conical guide opening can also be directly used as an inlet of an air flow path, so that air can directly enter along the inner wall of the shell.

An axial flow fan may be disposed downstream of the conical flow directing mechanism for pressurizing air entering the housing to direct air from a first axial end to a second axial end of the housing. In some embodiments, the axial flow fan may increase the pressure of the air within the housing, facilitating the flow of air within the housing, thereby accelerating the air filtration process.

The first swirling mechanism may be disposed downstream of the axial flow fan for swirling air to separate the air from the foreign substances under the action of centrifugal force. In some embodiments, the outward air swirls past the vanes and separates the air from the impurities under centrifugal force.

The fine filter mechanism may be disposed at a second axial end within the housing for filtering air passing through the first swirling mechanism. And a channel for enabling air to flow directly or reversely is arranged in the fine filtering mechanism and is connected with an outlet of an air flow path arranged on the shell. In some embodiments, when the outlet of the air flow path is disposed at the second axial end, a passage may be formed in the fine filter mechanism to direct air flow, thereby facilitating the removal of filtered clean air.

In order to smoothly discharge the dust in the shell, a dust discharge port is further arranged at the second axial end of the shell so as to smoothly discharge the dust in the shell. Further, a corresponding valve can be arranged on the dust discharge port to control the pressure in the shell, so that dust can be smoothly discharged.

It will be further understood by those skilled in the art from the foregoing description of the present specification that terms such as "vertical," "horizontal," "top," "bottom," "inner," "outer," "axial," "longitudinal," and "transverse," and the like, which refer to an orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings of the present specification, and are for purposes of facilitating the explanation of the aspects of the present utility model and simplifying the description, and do not explicitly or implicitly refer to devices or elements that must have, be constructed and operated in, the particular orientation, and therefore such orientation or positional relationship terms are not to be construed or interpreted as limiting aspects of the present utility model.

In some embodiments, the fine filtering mechanism may include a filter element disposed between the first cyclone mechanism and the second axial end of the housing, for filtering air passing through the first cyclone mechanism, and the filter element may have the passage disposed therein, which may direct or reverse flow air to enable air to be discharged from the different outlets. In some embodiments, the outlet of the air flow path may be provided at the second axial end of the housing or at the non-axial end of the housing, depending on the arrangement of the channels. When the outlet of the air flow path is provided in the middle of the housing, the inside of the filter element may be formed with a folded passage so that the air is folded after filtration and discharged through the outlet. When the outlet of the air flow path is provided at the second axial end of the housing, the middle portion of the cartridge may form a passage through which air is directed, facilitating air to be discharged directly from the outlet at the second axial end.

Next, the structure and operation principle of the air precleaner according to the present utility model will be described with reference to the structure of fig. 1 and the direction of the flow path of the air.

After the air containing dust enters the air precleaner, the axial flow fan 10 is started to achieve pressurization. Air containing certain impurities passes through the conical flow guide opening 9, so that the air flows close to the inner wall of the shell. In some embodiments, when the conical diversion port is directly used as the air inlet of the air precleaner, the dust-containing air can also directly enter the housing from the conical diversion port 9 and flow along the inner wall of the housing. After the air has increased in flow rate by the axial fan 10, it moves downstream along the inner wall of the housing, again swirling the air through the blades 21 and moving in the separation chamber 18.

The dust having a large weight by centrifugal force will move downstream along the spiral of the inner wall of the housing and be discharged through the first dust discharge port 20, and the separated air is filtered again with high accuracy through the filter element (filter medium) in the fine filter mechanism 16, so that clean air is obtained at the outlet 12. During this time, the seal cap 15 ensures sealing. Wherein the conical flow guide 9 and the blades 21 can form a set of air management system to realize the control of the air flow path. In order to reduce the resistance in the air flow, through the mode of setting up the toper water conservancy diversion mouth, when air passes through the toper water conservancy diversion mouth, will form an outward diffusion flow field to air is concentrated around the inner wall of casing rather than the casing middle part after axial fan, this has just reduced because of the pipeline subassembly of export 12 department shelters from the air flow and then forms the torrent, causes the problem that the resistance increases. The air flowing outward close to the inner wall of the housing forms a swirl flow when passing through the blades 21, and the air is separated from the foreign substances by centrifugal force. The conical flow guide (which has an angle) may be located upstream of the axial flow fan and the blades downstream of the axial flow fan, making it a complete set of air management systems.

In some embodiments, in order to enable the air precleaner to be adapted for use in various work environments, a rain cap 23 may also be included in the structure. The rain cap 23 may be provided at the first axial end of the housing or may be provided within the housing. In an application scenario, the rain hat can be arranged at the upstream of the conical flow guiding mechanism, so that the waterproof effect is realized. In the use process, the air pre-cleaner matched with the rain cap can be used in an environment with small dust concentration, and the rain cap 23 can also be removed and installed in a cabin or a place with protection.

In some embodiments, the structure of the air precleaner may be divided into sections and corresponding housing structures provided for ease of production and maintenance. In one application scenario, the housing may include a first housing, a second housing, and a third housing disposed extending along a longitudinal axis. In the case structure as set forth in fig. 1 and 2, the cone-shaped flow guiding mechanism and the axial fan are disposed in the first case 24, and at the same time, the outlet of the axial fan harness 14 is also provided on the first case 24, so that the axial fan is conveniently energized. The second housing 22 is used to form a transition chamber, and the swirling mechanism and the fine filter mechanism are disposed in the third housing 17. Further, a fourth housing 19 may be provided at the second axial end to realize dust discharge treatment. The fourth housing 19 is provided with at least one first dust outlet 20, which may also be shaped as desired. In some embodiments, the first dust exhaust 20 may implement an active dust exhaust process. In the operating state, the internal air pressure at the first dust discharge port 20 is greater than the external air pressure, so that dust can be ejected from the cavity formed by the fourth housing 19 in a spray form. Therefore, a normally closed valve can be added at the opening part of the first dust exhaust port, and is in a normally closed state in a shutdown state and is in a normally open state in a startup state. Furthermore, a normally closed valve is not added, and the valve state is always set to be normally open.

Further, in other forms of the housing structure, for example, a tapered flow guide, an axial flow fan, and the blades 21 may be provided together in the first housing 24.

The first casing 24, the second casing 22, the third casing 17, and the fourth casing 19 of the orifice plate protection net 1 may be connected by one or more of bolts, clips, threads, buckles, etc., so that the tightness may be ensured in practical application. The composition, number and form of the housing parts of the air precleaner can be selected and arranged according to actual requirements.

From the foregoing, it will be appreciated that the use of the terms "first" or "second" and the like in this specification for reference to a number or ordinal number is for descriptive purposes only and is not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Such as a first housing, a second housing, a third housing, a fourth housing, etc. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In the description of the present specification, the meaning of "plurality" means at least two, for example, two, three or more, etc., unless explicitly defined otherwise.

Example 2 of an air precleaner provided by the utility model:

fig. 2 is a schematic view schematically showing the structure of a through-type air precleaner according to an embodiment of the present utility model.

When it is desired to form the through-type filtering structure, as shown in fig. 2, the outlet of the air flow path may be provided at the second axial end portion of the air precleaner, and the fourth housing 19 may be replaced with the sixth housing 26 by replacing the second housing 22 shown in fig. 1 with the fifth housing 25, and the fifth housing 25 and the sixth housing 26 may be shaped to match the positions of the outlet, thereby achieving the through-type air filtering. At this time, a direct air flow path will be formed in the filter cartridge, and the filtered clean air will be discharged through an outlet provided at the second axial end.

In some embodiments, the length between the first axial end and the second axial end of the housing is adjustable for adjusting the flow rate and the flow volume of the air. In one application scenario, the deformation may be achieved by changing the air flow rate and flow volume by changing the length of the third housing 17 described above.

In the scheme of the utility model, the cleaning efficiency and the service life of the existing air precleaner are mainly improved, so that the air precleaner structure is provided, and is mainly used for solving the problem that clean air needs to be used under different configurations or working conditions, such as: ventilation system, heat exchange system, air conditioning system and internal combustion engine air intake system. In the scheme of the utility model, the service life of the air pre-cleaner is prolonged by reducing the concentration of dust in the shell and the contact of the dust and the axial flow fan, and the problem that the structure of the air pre-cleaner needs to be customized due to space reasons is solved by arranging different outlet positions, so that the manufacturing period is effectively shortened, the manufacturing cost is reduced, and the service life of a motor of the axial flow fan is prolonged. And through the special arrangement of the air flow path, the problem of blockage of the precleaner caused by unsmooth dust discharge is effectively reduced.

Example 3 of an air precleaner provided by the utility model:

the difference from example 1 is that:

as shown in fig. 3, 4 and 5, a second dust discharge port 30 is formed in a side wall of the first casing 24, a cyclone dust removing blade 28 is rotatably mounted in the first casing 24 around an axis extending up and down, specifically, a rotating shaft 27 is fixedly mounted on the axial fan 10, the cyclone dust removing blade 28 is fixedly mounted on the rotating shaft 27, and the axial fan 10 and the cyclone dust removing blade 28 are synchronously rotated through the rotating shaft 27. When the cyclone dust removing blades 28 rotate, a cyclone flow can be formed in the first shell 24, large-particle dust in the air in the first shell 24 advances spirally, and the large-particle dust is thrown out of the first shell 24 through the second dust discharging port 30 under the action of centrifugal force, so that coarse filtration is realized.

As shown in fig. 5, the cyclone dust removing blade 28 includes a wiper blade 281 at the radially outer end, and further includes a support rib 282 connecting the wiper blade 281 and the rotation shaft 27, and the number and arrangement of the support ribs 282 may be arbitrarily set as required. The wiper blade 281 is arranged obliquely, and the tangential direction of the wiper blade 281 is provided with an included angle different from 0, so that large-particle dust can be better pulled towards the second dust discharge opening 30. Wherein the number of cyclone dust removal blades 28 may be one, two or more. A rectifying vane 31 is fixedly installed on the rotation shaft 27, and the rectifying vane 31 can prevent turbulence from being generated in the first housing 24. As shown in fig. 4, the cross section of the rectifying vane 31 is L-shaped.

As shown in fig. 4 and 5, a flow guide cover 29 is installed at the inlet of the first housing 24, the flow guide cover 29 is in a shape of upper tip and lower width, the upper end of the flow guide cover 29 is in a tip, and the flow guide cover 29 can enable air to form an outward diffusion flow field and concentrate around the inner wall of the first housing 24 after the air enters the first housing 24. The air guide cover 29 allows air to be concentrated mainly around the inner wall of the first housing 24, not in the middle of the first housing 24, which avoids the increase in resistance caused by turbulence generated by the air flow being blocked by the duct of the outlet 12.

In order to avoid the formation of a vacuum cavity between the cyclone dust removing blades 28 and the air guide sleeve 29 after the cyclone dust removing blades 28 rotate, the bottom of the air guide sleeve 29 is an arc bottom end 32, the top of the cyclone dust removing blades 28 is also arc-shaped, the bottom of the air guide sleeve 29 and the top of each cyclone dust removing blade 28 are mutually matched, the gap between the two is reduced, and the vacuum cavity is avoided. Wherein, the first housing 24 is a straight cylinder, and the orifice plate protection net can be added at the upper end of the first housing 24.

In use, the axial flow fan 10 is started, and the air containing impurities passes through the orifice protection net to isolate the impurities with ultra-large volume such as straw, and then the flow guide passing through the flow guide cover 29 is concentrated on the inner wall of the first shell 24 and flows downwards. The axial flow fan 10 drives the rotational flow dust removing blades 28 to rotate, the air forms rotational flow to carry out dust separation of the first stage, large-particle dust is discharged through the second dust discharge port 30, air containing certain impurities flows downwards along the inner wall of the second shell 22 after passing through the axial flow fan 10, the air flows in the separation cavity 18 again through the blades 21, the dust with larger weight flows downwards along the spiral of the inner wall of the third shell 17 under the action of centrifugal force, the air is discharged through the first dust discharge port 20, the separated air is filtered again with high precision through the fine filtering mechanism 16, clean air is obtained at the outlet 12, and the sealing end cover 15 ensures sealing during the period.

Wherein at least one of the second dust discharge ports 30 is provided. The deformation can also be performed, for example, a normally closed valve is added at the second dust exhaust port 30, and is normally closed in a shutdown state, and after startup, because the internal air pressure is greater than the external air pressure, the dust is ejected out of the cavity in an ejection mode, namely, the dust is in a normally open state after startup.

The end of the pod 29 may be an arcuate end as shown in fig. 6, in addition to a tip.

Example 4 of an air precleaner provided by the utility model:

the difference from example 3 is that:

as shown in fig. 7, the first housing 24 has a small inner diameter at both ends and a large inner diameter in the middle, and the second dust discharge port 30 is provided in a portion of the first housing 24 having a large inner diameter, and the inlet and outlet have a small inner diameter.

Air enters the first shell 24 through the air inlet, the space becomes large after entering the inside of the first shell 24, the air flow expands, the flowing speed of the air becomes slow, and the air is prevented from directly passing through the first shell 24 without throwing out large-particle dust. The space becomes smaller when the air after dust removal passes through the air outlet again, the air flowing speed becomes fast, and the air can flow downstream rapidly.

Example 5 of an air precleaner provided by the utility model:

the difference from the above embodiment is that:

in the above embodiments, the cyclone dust removing blade 28 and the axial flow fan 10 are integrated, and the bearing fan 10 rotates and drives the cyclone dust removing blade 28 to rotate. In this embodiment, the cyclone dust removing blade is separately provided with a fan fixedly installed in the first housing.

While various embodiments of the present utility model have been shown and described herein, it will be obvious to those skilled in the art that such embodiments are provided by way of example only. Many modifications, changes, and substitutions will now occur to those skilled in the art without departing from the spirit and scope of the utility model. It should be understood that various alternatives to the embodiments of the utility model described herein may be employed in practicing the utility model. The appended claims are intended to define the scope of the utility model and to cover such modular compositions, equivalents, or alternatives falling within the scope of the claims.

Claims

1. An air precleaner, comprising:

a housing extending along a longitudinal axis between a first axial end and a second axial end for providing a flow path for air, the housing providing an inlet for the air flow path at the first axial end;

the conical diversion mechanism comprises a conical diversion port arranged at the first axial end part of the shell, and the conical diversion port faces the inner wall of the shell and is used for enabling air to form an outward diffusion flow field and concentrate around the inner wall of the shell after entering the shell;

an axial fan disposed downstream of the conical flow guide mechanism for pressurizing air entering the housing to direct air from a first axial end to a second axial end of the housing;

a first swirling mechanism provided downstream of the axial flow fan for swirling air to separate the air from impurities by centrifugal force;

a fine filtering mechanism arranged at the second axial end part in the shell and used for filtering the air passing through the first cyclone mechanism, wherein a channel for enabling the air to flow directly or reversely is arranged in the fine filtering mechanism, and the channel is connected with an outlet of an air flow path arranged on the shell;

the second axial end of the housing is provided with at least one dust discharge opening for discharging dust in the housing.

2. The air precleaner of claim 1, wherein the fine filter mechanism comprises a filter cartridge disposed between the first cyclone mechanism and the second axial end for filtering air passing through the first cyclone mechanism, the filter cartridge being internally provided with the channel.

3. The air precleaner of claim 2, wherein the outlet of the air flow path is disposed at a second axial end of the housing or a non-axial end of the housing.

4. The air precleaner of claim 1, further comprising a rain cap disposed at a first axial end of the housing or within the housing.

5. The air precleaner of claim 1, wherein the housing comprises a first housing, a second housing, and a third housing disposed extending along a longitudinal axis, the cone-shaped baffle mechanism and the axial fan being disposed within the first housing, the second housing for forming a transition chamber, the swirl mechanism and the fine filter mechanism being disposed within the third housing.

6. The air precleaner of claim 5, wherein the first, second and third housings are connected by any one or more of bolts, clips, threads, snaps.

7. The air precleaner of any of claims 1-6, wherein a length between the first axial end and the second axial end of the housing is adjustable for adjusting a flow rate and a flow rate of air.

8. An air precleaner, comprising:

a housing extending along a longitudinal axis between a first axial end and a second axial end for providing a flow path for air, the housing providing an inlet to the air flow path at the first axial end, a dust exhaust port being provided on a side wall of the housing;

an axial fan for pressurizing air entering the housing to direct air from a first axial end to a second axial end of the housing;

cyclone dust removing blades rotatably arranged at the upstream of the axial flow fan and used for enabling air to form a cyclone so as to enable impurities in the air to be thrown out of the shell through the dust discharging port under the action of centrifugal force;

9. The air precleaner of claim 8, wherein the cyclone dust removing blades are fixedly mounted on the axial flow fan through a rotation shaft such that the axial flow fan rotates the cyclone dust removing blades.

10. The air precleaner of claim 9, further characterized in that said rotatable shaft is provided with rectifying vanes.

11. An air precleaner according to claim 8 or 9 or 10, characterized in that the first axial end is provided with a flow guide for forming an out-diffusing flow field for air after entering the housing and concentrating around the inner wall of the housing.

12. An air precleaner according to claim 8 or 9 or 10, characterized in that the first axial end of the housing is of reduced diameter construction to reduce the flow rate of air after flowing through the inlet.