CN113757006A

CN113757006A - Compact pulse blowback long-life air cleaner

Info

Publication number: CN113757006A
Application number: CN202111077423.XA
Authority: CN
Inventors: 李明华; 徐洪斌; 陈克新; 曹海宇; 钟凤磊; 曹宇; 乔梦华; 李继新; 卢进军
Original assignee: China North Vehicle Research Institute
Current assignee: China North Vehicle Research Institute
Priority date: 2021-09-14
Filing date: 2021-09-14
Publication date: 2021-12-07
Anticipated expiration: 2041-09-14
Also published as: CN113757006B

Abstract

The invention relates to the technical field of special vehicle engines, and discloses a compact pulse back-flushing long-life air filter which comprises a prefilter, a dust pump, an air filter shell, an air filter element and a back-flushing module, wherein a filter chamber and an air collecting chamber are arranged in parallel in the inner cavity of the air filter shell; the back flushing module comprises a compressed air bag, a pulse valve and a nozzle; a prefilter and a dust pump are arranged on the surface of the air filter shell, and the dust pump is respectively communicated with the prefilter and a filter chamber of the air filter shell; an air filter element is arranged in the filter chamber, and the compressed air bag is arranged in the air filter shell and positioned on one side of the air filter element; the compressed air bag is connected with a pulse valve, and a nozzle corresponding to the air filter element is arranged on the pulse valve. The invention can clean the accumulated dust on the air filter element, thereby greatly improving the maintenance interval of the air filter and solving the problem of frequent maintenance of the air filter element in the current special vehicle.

Description

Compact pulse blowback long-life air cleaner

Technical Field

The invention relates to the technical field of special vehicle engines, in particular to a compact pulse back-flushing long-life air filter.

Background

The power of a special vehicle is very high, the power and the transmission device of the special vehicle are often packaged in a power cabin, in order to pursue the high power density of the power cabin, the air filter needs to meet the compact space of the power cabin, the size of the air filter is small, the high surface wind speed is caused, the air inlet resistance of the air filter of the special vehicle is high, the maintenance and the maintenance are frequent, meanwhile, the oil consumption of an engine is increased, the power output is influenced, finally, the small size and the large flow of the air filter can cause the maneuverability of the vehicle to be limited, and the reliability of the air filter is reduced due to frequent maintenance of an air filter element. Therefore, the problem of frequent maintenance of the air filter element is faced by special vehicles at present.

Disclosure of Invention

The invention aims to solve the technical problems in the prior art and provides a compact pulse back-blowing long-life air filter.

In order to solve the problems proposed above, the technical scheme adopted by the invention is as follows:

the invention discloses a compact pulse back-flushing long-life air filter which comprises a prefilter, a dust pump, an air filter shell, an air filter element and a back-flushing module, wherein a filter chamber and an air collecting chamber are arranged in parallel in the inner cavity of the air filter shell; the back flushing module comprises a compressed air bag, a pulse valve and a nozzle;

a prefilter and a dust pump are arranged on the surface of the air filter shell, and the dust pump is respectively communicated with the prefilter and a filter chamber of the air filter shell; an air filter element is arranged in the filter chamber, a pulse valve communicated with an inner cavity is arranged on the compressed air bag, and a nozzle corresponding to the air filter element is arranged on the pulse valve; and the pulse valve controls compressed gas flowing into the nozzle in the compressed gas bag, and the compressed gas acts on the air filter element to perform blowing maintenance.

Furthermore, a dust extraction proportion regulation cavity connected with an inlet of the dust extraction pump is further arranged on the surface of the air filter shell, and a flow deflector is arranged in the dust extraction proportion regulation cavity and is respectively connected with a dust collection cavity of the pre-filter and a filter chamber of the air filter shell.

Furthermore, the back flushing module also comprises an air compressor, a pressure regulating valve, a filtering purifier and a safety valve, wherein the input end of the air compressor is connected with an external engine for driving, and the output end of the air compressor is connected with a compressed air bag; and a pressure regulating valve, a filtering purifier and a safety valve are sequentially arranged between the air compressor and the compressed air bag along the air inlet direction.

Furthermore, the back flushing module also comprises a pulse controller and a power supply, wherein the pulse controller is positioned outside the air filter shell and is connected with the pulse valve; the pulse controller is also connected with a power supply.

Further, the nozzle include with connecting pipe, connecting block and the V-arrangement board that the pulse valve is connected, the V-arrangement board is connected through the connecting block to the connecting pipe surface, the open end orientation of V-arrangement board the air filter core.

Furthermore, a back-blowing dust collecting block is arranged at the bottom of the inner side of the air filter shell and is used for supporting the air filter element and collecting dust settled by back-blowing; and the dust collecting cavity is communicated with the dust extraction proportion regulation cavity.

Furthermore, a dust collection channel which is connected with the dust receiving cavity and the dust extraction proportion regulation cavity is also arranged in the gas collection chamber of the air filter shell, and a connecting plate is arranged in the dust collection chamber; one end of the connecting plate corresponds to the end part of the dust collection channel and is used for preventing dust in the dust collection cavity from flowing into the gas collection chamber.

Furthermore, the back-blowing dust collecting block is of a V-shaped structure, the opening end of the back-blowing dust collecting block corresponds to the position of the air filter element, and a dust collecting gap communicated with the dust collecting cavity is formed at the bottom of the back-blowing dust collecting block; the width of the dust collection gap is gradually increased from the tail end to the front end of the air filter element, and the end part with the large width corresponds to the position of the dust collection channel.

Furthermore, the lateral wall of the air filtering shell is provided with an access door corresponding to the position of the air collecting chamber, and the access door is provided with a compressed air access port, a pulse valve control line access port and a filter outlet.

Further, air filter includes the filter core casing, sets up filter paper on filter core casing surface, the one end of filter core casing is the filter core export, the surface of filter core casing still sets up the filter core handle.

Compared with the prior art, the invention has the beneficial effects that:

when the back blowing module does not work, the air filter provided by the invention has the same function as the traditional air filter, large dust particles are separated by the pre-filter, the separated dust particles are discharged by the dust pump, airflow primarily purified by the pre-filter enters the air filter shell and is subjected to secondary fine filtration by the air filter element, and finally clean air is led to an engine without changing the basic performance of the air filter. In the actual use process, the pulse controller can be manually controlled according to the use requirements to perform back-blowing cleaning on the air filter element, and the starting time of the back-blowing module can be automatically set according to the pressure value at the rear end of the air filter element. The work of blowback module can in time clear up the dust of deposit on the air cleaner, makes the resistance rise speed of air cleaner slow down, promotes the maintenance interval of air cleaner by a wide margin.

Therefore, the invention has simple and compact integral structure and reliable work, can improve the current situations that the engine air filter in a compact space is frequently blocked and the maintenance interval is short under the high-dust use environment of the special vehicle, and solves the problem of frequent maintenance of the air filter element of the current special vehicle, namely, prolongs the service life of the air filter element and the air filter.

Drawings

In order to illustrate the solution of the invention more clearly, the drawings that are needed in the description of the embodiments will be briefly described below, it being obvious that the drawings in the following description are some embodiments of the invention, and that other drawings may be derived from these drawings by a person skilled in the art without inventive effort. Wherein:

FIG. 1 is an overall structure diagram of the compact back-flushing long-life air cleaner of the present invention.

FIG. 2 is a partial structure diagram of the compact back-flushing long-life air cleaner of the present invention.

Fig. 3 is a schematic structural view of the inside of the air filter housing according to the present invention.

Fig. 4 is a front view of the interior of the air filter housing of the present invention.

Fig. 5 is a schematic view of the structure of the air filter element of the present invention.

Fig. 6 is a schematic structural view of the airflow in the dust extraction ratio control cavity in the invention.

FIG. 7 is a general schematic diagram of the back flushing module according to the present invention.

FIG. 8 is a schematic view of the structure of the nozzle of the present invention.

FIG. 9 is a schematic view of the flow of gas in the nozzle of the present invention.

FIG. 10 is a schematic view of the bottom of the interior chamber of the air filter housing of the present invention.

The reference numerals are explained below: 1-prefilter, 2-dust extraction pump, 3-air filter shell, 4-air filter element, 5-back blowing module, 6-filter chamber, 7-air collection chamber, 8-dust extraction proportion regulation cavity, 9-flow deflector, 10-back blowing dust collection block, 101-dust collection gap, 11-dust collection cavity, 12-dust collection channel, 13-access door, 14-compressed air access port, 15-pulse valve control line access port, 16-partition plate, 161-opening, 17-connecting plate, 31-filter outlet, 41-filter element shell, 42-filter paper, 43-filter element handle, 44-filter element outlet, 51-air compressor, 52-pressure regulating valve, 53-filter purifier, 54-safety valve, 55-compressed air bag, etc, 56-pulse valve, 57-nozzle, 58-pulse controller, 59-power supply, 571-connecting pipe, 572-connecting block, 573-V-shaped plate, 81-first interface, 82-second interface, 83-dust exhaust channel, 84-first back-blowing dust exhaust channel and 85-second back-blowing dust exhaust channel.

Detailed Description

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs; the terminology used in the description presented herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention, e.g., the terms "length," "width," "upper," "lower," "left," "right," "front," "rear," "vertical," "horizontal," "top," "bottom," "inner," "outer," etc., refer to an orientation or position based on that shown in the drawings, are for convenience of description only and are not to be construed as limiting of the present disclosure.

The terms "including" and "having," and any variations thereof, in the description and claims of this invention and the description of the above figures are intended to cover non-exclusive inclusions; the terms "first," "second," and the like in the description and in the claims, or in the drawings, are used for distinguishing between different objects and not necessarily for describing a particular sequential order. In the description and claims of the present invention and in the description of the above figures, when an element is referred to as being "fixed" or "mounted" or "disposed" or "connected" to another element, it may be directly or indirectly located on the other element. For example, when an element is referred to as being "connected to" another element, it can be directly or indirectly connected to the other element.

Furthermore, reference herein to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment can be included in at least one embodiment of the invention. The appearances of the phrase in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments. It is explicitly and implicitly understood by one skilled in the art that the embodiments described herein can be combined with other embodiments.

Referring to fig. 1 to 4, an embodiment of the present invention provides a compact back-flushing long-life air cleaner, including: the air filter comprises a prefilter 1, a dust extraction pump 2, an air filter shell 3, an air filter element 4 and a back blowing module 5, wherein a filter chamber 6 and a gas collection chamber 7 are arranged in parallel in the inner cavity of the air filter shell 3; the blowback module 5 comprises a compressed air bag 55, a pulse valve 56 and a nozzle 57.

The prefilter 1 and the dust pump 2 are installed in parallel above the outside of the air filter housing 3, and the dust pump 2 is connected with the prefilter 1 and the filter chamber 6 of the air filter housing 3 respectively. An air filter element 4 is arranged in the filter chamber 6, and the compressed air bag 55 is arranged in the air filter shell 3 and is positioned on one side of the air filter element 4. The compressed air bag 55 is provided with a pulse valve 56, the pulse valve 56 is communicated with the inner cavity of the compressed air bag 55, and a nozzle 57 corresponding to the position of the air filter element 4 is arranged. The pulse valve 56 controls the compressed gas in the compressed gas bag 55 flowing into the nozzle 58, which acts on the air filter element 4 for blowing maintenance. Specifically, the pulse valve 56 and the nozzle 57 are positioned in the gas collection chamber 7. The nozzle 57 is located between the pulse valve 56 and the air filter 4, and the open end of the nozzle 57 faces the inside of the air filter 4.

In this embodiment, the pre-filter 1 is a cyclone tube type pre-filter, which can reliably and effectively separate large dust particles in the air entering the air filter, and reduce the amount of dust entering the air filter element 4, thereby improving the service time of the air filter element 4.

Further, a partition 16 (shown in fig. 3 and 10) is arranged in the air filter housing 3, and the partition 16 divides the inner cavity of the air filter housing 3 into a filter chamber 6 and a gas collecting chamber 7, i.e. the filter chamber 6 and the gas collecting chamber 7 are located on both sides of the partition 16 in parallel. The baffle 16 is provided with an elongate opening 161 and the outlet of the air filter element 4 is located at the opening 161. Specifically, the dust-containing air separated from the large dust particles by the prefilter 1 enters the filter chamber 6, and the clean air flow filtered by the air filter element 4 enters the air collection chamber 7.

In this embodiment, two air filter elements 4 are disposed in parallel in the filter chamber 6, the compressed air bag 55 is located between the two

air filter elements

4, 3 pulse valves 56 are disposed at the outlet of each air filter element 4 and corresponding to the opening 161, each pulse valve 56 is connected to a nozzle 57, the inlet of the pulse valve 56 is fixed to the auxiliary seat of the compressed air bag 55 through a flange, the outlet of the pulse valve 56 is fixed to the nozzle 57 through a thread or a flange, and the nozzle 57 faces the inside of the air filter element 4. Specifically, the number of the pulse valves 56 and the nozzles 57 can be increased or decreased according to actual needs.

In this embodiment, referring to fig. 5, the air filter element 4 includes a filter element housing 41 and filter paper 42 disposed on a surface of the filter element housing 41, one end of the filter element housing 41 is a filter element outlet, for convenience of installation, a filter element handle 43 is further disposed on the surface of the filter element housing 41, and the number of the filter element handles 43 can be increased or decreased according to actual needs.

Further, a dust-pumping ratio adjusting cavity 8 connected to an inlet of the dust-pumping pump 2 is further disposed outside the air filter housing 3, and a flow deflector 9 (shown in fig. 6) is disposed inside the dust-pumping ratio adjusting cavity 8 and is respectively connected to the dust-collecting cavity of the pre-filter 1 and the filter chamber 6 of the air filter housing 3. Specifically, the dust-extraction ratio adjusting cavity 8 is provided with a first interface 81 communicated with a dust-collecting cavity of the pre-filter 1, a second interface 82 connected with the dust-extraction pump 2, a dust-exhaust channel 83 and a first back-blowing dust-exhaust channel 84 which are positioned at two sides of the flow deflector 9, and a second back-blowing dust-exhaust channel 85 which is positioned at one side of the back-blowing dust-exhaust channel 84.

In this embodiment, the dust pump 2 is connected to an external power source, and the positions of the flow deflectors 9 in the dust-pumping ratio control cavity 8 are adjusted to adjust the areas of the dust-pumping passages in two directions, so that the expected dust-pumping flow of the dust-collecting chamber of the prefilter 1 and the filter chamber 6 of the air filter housing 3 can be obtained, and the dust-separated by the prefilter 1 and the dust-stripped by the reverse-blowing air filter element 4 can be sucked.

Further, as shown in fig. 3, 4 and 7, the blowback module 5 further includes an air compressor 51, a pressure regulating valve 52, a filter purifier 53 and a safety valve 54, the end of the compressed air bag 55 is connected to the air compressor 51, the input end of the air compressor 51 is connected to an external engine for driving, and the output end is connected to the compressed air bag 55. A pressure regulating valve 52, a filter purifier 53 and a safety valve 54 are sequentially arranged between the air compressor 51 and the compressed air bag 55 from the outside to the inside (i.e., along the air intake direction) of the air filter housing 3.

Further, the blowback module 5 further includes a pulse controller 58 and a power supply 59, the pulse controller 58 is located outside the air filter housing 3, and is connected with the pulse valve 56 through a signal line to control the operation of the pulse valve 56. The pulse controller 58 is also connected to a vehicle 24VDC power supply 59.

Specifically, the air compressor 51 is a vehicle-mounted air compressor, and the air supply amount is not less than 50 liters per minute. The capacity of the compressed air bag 55 is 15 liters, the inflation pressure is 5-10atm, and the inflation time of the compressed air bag 55 is not more than 5 minutes. The pressure range of pulse back flushing can be set within 5-10atm through the pressure regulating valve 52, the pulse width can be set within 0.06-0.2s through the pulse controller 58, the blowing interval of the pulse valve 56 can be adjusted within 1 minute to 60 minutes, and the pulse cycle interval can be set within 1 minute to 2 hours. By providing the relief valve 54, the compressed air bag 55 is not inflated when the supply air pressure is higher than 10 atm. The water and impurities in the compressed air are filtered by the filter cleaner 53, thereby ensuring reliable operation of the pulse valve 56.

In this embodiment, the compressed air from the air compressor 51 is adjusted to the pressure required by the compressed air bag 55 through the pressure regulating valve 52, purified by the filter purifier 53, and then introduced into the compressed air bag 55 through the safety valve 54, and when the pressure in the compressed air bag 55 exceeds 10atm, the safety valve 54 controls to reach the limited pressure, and then the inflation of the compressed air bag 55 is stopped. When the pulse controller 58 is powered on, the pulse valve 56 is opened according to a program set in the pulse controller 58, and the air filter element 4 is blown back from inside to outside, that is, the airflow is blown from the inner side to the outer side of the air filter element 4 to realize back blowing cleaning, so that the purpose of cleaning dust deposited on the air filter element 4 is achieved.

Further, 1 cun right angle valve is adopted to pulse valve 56, nozzle 57 adopts V type nozzle, and the open end orientation air filter 4, nozzle 57's angle is 30, and the width is 30mm, and length is 50 mm. Specifically, referring to fig. 8, the nozzle 57 includes a connection pipe 571 connected to the pulse valve 56, a connection block 572, and a V-shaped plate 573, wherein the connection pipe 571 is connected to the V-shaped plate 573 through the connection block 572, and an open end of the V-shaped plate 573 faces the air filter 4. The direction of the arrow in fig. 9 shows the direction of the gas passing through the nozzle 57, and after the gas is sprayed from the compressed gas bag 55 and the pulse valve 56, the gas is forcibly divided by the V-shaped plate 573 to both sides after being sprayed from the connection pipe 571, and can be blown to the air filter element 4 better.

Further, referring to fig. 10, a back-blowing dust collecting block 10 is disposed at the bottom of the inner side of the air filter housing 3, and is used for supporting the air filter element 4 and collecting dust settled by back-blowing. And a dust collecting cavity 11 is formed on the inner side of the air filter shell 3 and below the back blowing dust collecting block 10, and the dust collecting cavity 11 is communicated with the dust extraction proportion regulation cavity 8.

Furthermore, a dust collection channel 12 is further arranged in the collection chamber 7 of the air filter housing 3, and the dust collection channel 12 is connected with a dust receiving cavity 11 and a second back-blowing dust discharge channel 85 of the dust extraction proportion regulation and control cavity 8 and is used for discharging dust. The bottom of the inner side of the collection chamber 7 is further provided with a connecting plate 17, one end of the connecting plate 17 corresponds to the end part of the dust collection channel 12, and the connecting plate is used for blocking dust entering the dust collection channel 12 from the dust collection cavity 11 from flowing into the collection chamber 7.

Furthermore, the blowback dust collection block 10 is a V-shaped structure, the opening end deviates from the direction of the dust collection cavity 11, namely, the opening end corresponds to the position of the air filter element 4, a long and narrow dust collection gap 101 is formed at the bottom, the dust collection gap 101 is communicated with the dust collection cavity 11, the width of the dust collection gap 101 is gradually increased from the tail end to the front end of the air filter element 4, the end part with the large width corresponds to the position of the dust collection channel 12, namely, the end part is increased from 1mm to 3mm, and the flow speed in the dust collection gap is ensured to reach 15m/s according to the dust collection flow.

In this implementation, through setting up dust absorption gap 101 and dust absorption passageway 12, the dust that is inhaled dust absorption gap 101 falls into dust collecting cavity 11 earlier, and rethread dust absorption passageway 12 is discharged into in taking out dirt proportion regulation and control cavity 8, finally is discharged by dust pump 2, sets up connecting plate 17 and blocks that the dust flows into in the collection chamber 7. By arranging the width of the dust suction slit 101 to be gradually increased and making the end with the larger width correspond to the position of the dust suction channel 12, the dust collection cavity 11 can reliably collect dust and the dust can be discharged from the dust suction channel 12.

Further, as shown in fig. 1, an access door 13 is provided on the sidewall of the air filter housing 3 and corresponding to the position of the air collection chamber 7, the access door 13 is provided with a compressed air inlet 14, a pulse valve control line inlet 15 and a filter outlet 31, and the pulse valve 56 and the nozzle 57 can be accessed by detaching the access door 13 as needed.

The working process of the compact type pulse back-blowing long-life air filter provided by the invention is as follows:

when the air is filtered, the air containing dust enters the prefilter 1 for coarse filtration, the filtered dust is discharged through the dust pump 2, the primarily purified air enters the filter chamber 6 of the air filter housing 3, the air in the filter chamber 6 enters the air collecting chamber 7 after being secondarily purified by the air filter element 4, and then the air is supplied to an external engine through the filter outlet 31.

When the pulse control system monitors the rotating speed of the engine and the resistance of the filter outlet 31 and prompts that the back blowing module 5 needs to be started to clean and maintain the air filter element 4, the pulse controller 59 automatically controls the pulse valve 56 to be opened according to set time, compressed air is released and dispersed to the inner surface of the air filter element 4 through the nozzle 57 to form airflow impact and reverse blowing force, dust attached to the outer surface of the air filter element 4 is blown off, the service time of the air filter element 4 is prolonged, and the resistance of the air filter element 4 is reduced.

Further, when the blowback module 5 in the air cleaner provided by the invention is opened, the following modes of shutdown blowing, idle blowing and high-resistance blowing are available, and the modes specifically comprise:

firstly, a high-resistance blowing mode: the external system monitors the air filter outlet pressure and engine speed for feedback to the pulse controller 58. When the pulse controller 58 detects that the engine speed is greater than 1600rpm and the intake pressure is higher than 5kPa, the blowback module 5 is in the high-dust-cleaning mode, i.e., 3 pulse valves 56 of each air filter 4 are in one group and are simultaneously opened and blown to the air filter 4 through the nozzle 57 once every 60 minutes. When the engine speed is detected to be lower than 1600rpm or the air filter resistance is detected to be lower than 5kPa, the pulse controller 58 controls the blowback module 5 to stop working.

And secondly, in an idle speed blowing (ash removal) mode, when the pulse controller 58 detects that the engine is in an idle speed working condition, the back blowing module 5 is started, and the air filter element 4 is blown reversely once through the nozzle 57 and then is stopped.

Thirdly, stopping blowing (ash removal) mode: when the pulse controller 58 detects that the engine is shut down and the power is not turned off, the back blowing module 5 is started to blow air to the air filter element 4 reversely once.

In the invention, the back-blowing module 5 is arranged in the air filter shell 3, the pulse controller 58 is adopted to control the compressed air sprayed by the pulse valve 56, the air filter element 4 is cleaned and maintained reversely, the dust deposited on the air filter element 4 is blown down, the resistance of the air filter element 4 is reduced, the maintenance interval of the air filter is prolonged, and the pulse controller 58 and the pulse valve 56 can be controlled to work according to the actual requirement (namely the rotating speed of an engine), so that different blowing modes of the back-blowing module 5 are realized, the whole structure is simple and compact, and the work is reliable.

Compared with the traditional air filter, the pulse back-flushing long-life air filter realizes the disassembly-free online maintenance of the air filter element 4, and finally realizes the maintenance-free performance in the whole life cycle of the air filter element 4; in addition, due to the effect of back-blowing cleaning, less dust is deposited on the air filter element 4 in the air inlet filtering process, so that the air filter can be always under lower air inlet resistance, the power output of an engine can be improved, the oil consumption of the engine can be reduced, and the service lives of the air filter element 4 and the air filter can be prolonged. Meanwhile, the filter element sealing failure possibly caused by frequent disassembly and assembly of the air filter element 4 is avoided, and the disassembly-free maintenance can also improve the working reliability of the air filter.

The air filter provided by the invention can be used on air inlet filters of various vehicles, and has wide application range as long as compressed air is arranged on the vehicles or the air filter carries the compressed air.

The above embodiments are preferred embodiments of the present invention, but the present invention is not limited to the above embodiments, and any other changes, modifications, substitutions, combinations, and simplifications which do not depart from the spirit and principle of the present invention should be construed as equivalents thereof, and all such changes, modifications, substitutions, combinations, and simplifications are intended to be included in the scope of the present invention.

Claims

1. The utility model provides a compact pulse blowback long-life air cleaner which characterized in that: the dust-removing filter comprises a prefilter, a dust-extracting pump, an air filter shell, an air filter element and a back-blowing module, wherein a filter chamber and an air collecting chamber are arranged in parallel in an inner cavity of the air filter shell; the back flushing module comprises a compressed air bag, a pulse valve and a nozzle;

a prefilter and a dust pump are arranged on the surface of the air filter shell, and the dust pump is respectively communicated with the prefilter and a filter chamber of the air filter shell; an air filter element is arranged in the filter chamber, and the compressed air bag is arranged in the air filter shell and positioned on one side of the air filter element; the compressed air bag is provided with a pulse valve communicated with the inner cavity, and the pulse valve is provided with a nozzle corresponding to the position of the air filter element; and the pulse valve controls compressed gas flowing into the nozzle in the compressed gas bag, and the compressed gas acts on the air filter element to perform blowing maintenance.

2. The compact back-pulse long life air cleaner of claim 1 further comprising: the surface of the air filter shell is also provided with a dust extraction proportion regulating cavity connected with an inlet of the dust extraction pump, and a flow deflector is arranged in the dust extraction proportion regulating cavity and is respectively connected with a dust collection cavity of the pre-filter and a filter chamber of the air filter shell.

3. The compact back-pulse long life air cleaner of claim 1 further comprising: the back flushing module also comprises an air compressor, a pressure regulating valve, a filtering purifier and a safety valve, wherein the input end of the air compressor is connected with an external engine for driving, and the output end of the air compressor is connected with a compressed air bag; and a pressure regulating valve, a filtering purifier and a safety valve are sequentially arranged between the air compressor and the compressed air bag along the air inlet direction.

4. The compact back-pulse long life air cleaner of claim 3 further comprising: the back flushing module also comprises a pulse controller and a power supply, wherein the pulse controller is positioned outside the air filter shell and is connected with the pulse valve; the pulse controller is also connected with a power supply.

5. The compact back-pulse long life air cleaner of claim 1 further comprising: the nozzle include with connecting pipe, connecting block and the V-arrangement board that the pulse valve is connected, the V-arrangement board is connected through the connecting block to the connecting pipe surface, the open end orientation of V-arrangement board air filter.

6. The compact back-pulse long life air cleaner of claim 1 further comprising: the bottom of the inner side of the air filter shell is provided with a back-blowing dust collecting block which is used for supporting the air filter element and collecting dust settled by back-blowing; and the dust collecting cavity is communicated with the dust extraction proportion regulation cavity.

7. The compact back-pulse long life air cleaner of claim 6 further comprising: a dust collection channel connected with the dust receiving cavity and the dust extraction proportion regulation cavity is also arranged in the gas collection chamber of the air filter shell, and a connecting plate is arranged in the dust collection chamber; one end of the connecting plate corresponds to the end part of the dust collection channel and is used for preventing dust in the dust collection cavity from flowing into the gas collection chamber.

8. The compact back-pulse long life air cleaner of claim 6 further comprising: the back-blowing dust collection block is of a V-shaped structure, the opening end of the back-blowing dust collection block corresponds to the position of the air filter element, and a dust collection gap communicated with the dust collection cavity is formed at the bottom of the back-blowing dust collection block; the width of the dust collection gap is gradually increased from the tail end to the front end of the air filter element, and the end part with the large width corresponds to the position of the dust collection channel.

9. The compact back-pulse long life air cleaner of claim 1 further comprising: the side wall of the air filtering shell is provided with an access door corresponding to the position of the air collecting chamber, and the access door is provided with a compressed air access port, a pulse valve control line access port and a filter outlet.

10. The compact back-pulse long life air cleaner of claim 1 further comprising: the air filter element comprises a filter element shell and filter paper arranged on the surface of the filter element shell, one end of the filter element shell is a filter element outlet, and a filter element handle is further arranged on the surface of the filter element shell.