Novel self-cleaning air filtering equipment

Abstract

The invention discloses novel self-cleaning air filtering equipment which comprises a case, a fan, a cyclone device, a filtering barrel, a self-cleaning module, a first dust collecting box and a second dust collecting box, wherein the first dust collecting box and the second dust collecting box are arranged below the cyclone device and the filtering barrel and are used for receiving filter residues; the cyclone device divides the case into a first cavity, a second cavity and a third cavity from top to bottom, and the second cavity in the middle of the cyclone device corresponds to the first air inlet of the case body; a fourth cavity and a sixth cavity which are used for containing the filtering barrel and the self-cleaning module respectively are further formed in the machine box, a fifth cavity is formed between the fourth cavity and the sixth cavity for communication, an inlet and an outlet of the draught fan are located in the fifth cavity and the sixth cavity respectively, a first one-way valve is arranged between the first cavity and the fourth cavity for communication, and a second one-way valve is arranged between the second cavity and the sixth cavity for communication. And the sixth cavity is communicated with the first air outlet of the box body.

Description

Technical field:

[0001] The invention relates to the field of environmental protection equipment, in particular to a novel self-cleaning air filtering equipment. Background technology:

[0002] Air filters are equipment used to remove harmful substances from the air and are widely used in industrial production. In industrial processes such as mechanical processing, chemical production and combustion, a large amount of toxic and harmful exhaust gas and particulate matter, such as oil mist, dust, volatile organic compounds (VOCs) and smoke, will be generated. These pollutants pose a threat to the health of workers and the normal operation of equipment. Industrial air filters can effectively remove particulate matter and harmful gases in exhaust gas through multi-stage filtration technology, such as bag filters, HEPA filters, activated carbon filters and electrostatic precipitators, improve the workshop environment, reduce equipment loss, and ensure compliance with environmental emission standards.

[0003] For example: the air filtration treatment device for machine tools with the Chinese patent authorization announcement number CN202962159U, in the technical solution disclosed in the patent, an air inlet is provided at one end of the box body, a negative pressure forming box is provided at the other end of the box body, an air outlet is provided on the negative pressure forming box, a filtering mechanism is provided in the box body, the filtering mechanism includes a bracket provided in the filter cavity, a diffusion guide structure and a filtering structure distributed along the axial direction of the air inlet are provided on the bracket, a sewage discharge mechanism is provided at the lower part of the box body and the negative pressure forming box, a mounting port for loading the filtering mechanism is provided at the upper part of the box body, a cover plate is connected to the mounting port through an opening and closing mechanism, and a sealing structure is provided between the cover plate and the mounting port. The setting of the diffusion guide structure and the filtering structure is conducive to enhancing the filtering accuracy of the entire device, improving the filtering effect, and extending the service life of the filtering device, and the setting of the mounting port and the opening and closing mechanism is conducive to the disassembly and cleaning of the filtering mechanism.

[0004] However, the above prior art still has the following problems:

[0005] 1. The filter mechanism 4 needs to be frequently disassembled and cleaned, which not only affects the operation of the machine tool, but also is time-consuming, labor-intensive and costly;

[0006] 2. The filtering range of a single filtering mechanism 4 is limited, and it is impossible to achieve efficient filtering of particles of different sizes. It is also very easy to cause the filtering effect of the filtering mechanism 4 to decline, and frequent maintenance is required;

[0007] 3. The negative pressure forming box 3 and the air inlet 2 are respectively located at the two ends of the box body 1, causing the airflow to directly impact the filter mechanism 4. There is a lack of buffering and equalizing flow space, resulting in an excessively fast flow rate, which reduces the filtering effect of the filter mechanism 4.

[0008] In view of this, the inventor proposes the following technical solution. Summary of the invention:

[0009] The purpose of the present invention is to overcome the deficiencies of the prior art and provide a novel self-cleaning air filtering device.

[0010] In order to solve the above technical problems, the present invention adopts the following technical solutions: a new self-cleaning air filtration device, comprising: a chassis, a fan, a cyclone device, a filter barrel, a self-cleaning module, and a first dust box and a second dust box arranged below the cyclone device and the filter barrel and used to receive the filter residue; the cyclone device divides the chassis from top to bottom into a first cavity, a second cavity and a third cavity, and the second cavity in the middle of the cyclone device corresponds to the first air inlet of the chassis; the chassis is also provided with a fourth cavity and a sixth cavity respectively used to accommodate the filter barrel and the self-cleaning module, a fifth cavity is arranged between the fourth cavity and the sixth cavity, and the inlet and outlet of the fan are respectively located in the fifth cavity and the sixth cavity, a first one-way valve is arranged between the first cavity and the fourth cavity, and the sixth cavity is connected to the first air outlet of the chassis.

[0011] Furthermore, in the above technical solution, the self-cleaning module includes a rotary back-blowing device located in the filter barrel and capable of rotating, an air storage tank arranged in the chassis, a connecting hose connecting the air storage tank and the rotary back-blowing device, an air valve arranged on the connecting hose, and an oil-water separation device arranged on the connecting pipe between the air storage tank and the external air source.

[0012] Furthermore, in the above technical solution, the rotary back-blowing device includes a support tube that is docked with a hose and extends into the filter barrel, and a rotary jet tube rack that is rotatably installed at the lower end of the support tube and can spray air to the side, and the rotary jet tube rack is provided with at least two rows of vertically arranged jet holes.

[0013] Furthermore, in the above technical solution, a first cover plate is slidably mounted on the support tube, and a diameter of the first cover plate is larger than the first connecting hole between the fourth cavity and the fifth cavity. A wind collecting hood that can be covered on the first cover plate is mounted on the upper end of the support tube, and a sleeve portion that can extend into the wind collecting hood is provided on the upper end of the first cover plate. A pressure relief hole for introducing air into the wind collecting hood to push the first cover plate downward to cover the first connecting hole is provided on the tube wall of the support tube, and a reset spring for lifting the first cover plate to open the first connecting hole is also mounted on the support tube.

[0014] Furthermore, in the above technical solution, the chassis is also provided with a second one-way valve located beside the filter barrel and used for quickly discharging gas when the rotating back-blowing device blows air. A silencer is provided on the outside of the second one-way valve, and the upper end of the silencer is connected to the sixth cavity. The first air outlet of the chassis is located at the upper end of the silencer.

[0015] Furthermore, in the above technical solution, the gas valve is a solenoid valve and has two switchable modes of timed gas explosion and manual gas explosion, and a selection switch for switching between timed gas explosion and manual gas explosion is provided on the chassis; a timer for controlling the timed gas explosion of the gas valve and a pulse meter located next to the timer are provided in the chassis.

[0016] Furthermore, in the above technical solution, the cyclone device includes a second air inlet located in the center and corresponding to the second cavity, a plurality of second air outlets and dust exhaust ports arranged on the periphery of the second air inlet and facing upward and downward respectively, and a plurality of guide air ducts connected to the central second air inlet and spirally coiled outward on the second air outlet one by one, wherein the second air outlet and the dust exhaust port are respectively located in the first cavity and the third cavity, and the dust exhaust port is funnel-shaped.

[0017] Furthermore, in the above technical solution, there are multiple cyclone devices, and a first mounting plate located between the first cavity and the second cavity and used to install the cyclone device is provided in the chassis. The first mounting plate is installed at an angle so that the second air outlet faces the first one-way valve.

[0018] Furthermore, in the above technical solution, a first filter for filtering large particles is arranged in the first air inlet, the first filter is located between the first air inlet and the second cavity, and an inlet cavity for accommodating large particles is arranged in the first air inlet.

[0019] Furthermore, in the above technical solution, the chassis includes an upper box body and a lower box body, wherein the fan and the self-cleaning module are located in the upper box body, the cyclone device and the filter barrel are located in the lower box body, the first dust box and the second dust box are symmetrically installed at the bottom of the lower box body and can be pulled out to both sides respectively; an inner shell body is installed in the upper box body, which is covered above the filter barrel and forms a fifth cavity, the fan is installed on the inner shell body, and one end of the self-cleaning module extends through the inner shell body into the filter barrel.

[0020] After adopting the above technical scheme, the present invention has the following beneficial effects compared with the prior art: the present invention adopts a fan to generate negative pressure suction in the chassis, sucks in external air from the first air inlet of the chassis, first undergoes centrifugal separation through a cyclone device, separates large particles of dust in the air and drops them into the first dust collecting box, and the air entering the fourth cavity after filtration is filtered again through the filter barrel and enters the fifth cavity, and is drawn out by the fan and discharged into the sixth cavity, and finally discharged from the first air outlet, thereby realizing multiple filtration of the air; and when a certain thickness of dust is deposited on the filter barrel, a high-speed airflow is sprayed into the filter barrel through the self-cleaning module to generate a gas explosion, and the dust attached to the filter barrel is blown into the second dust collecting box under the impact of the airflow, thereby realizing back flushing of the filter barrel, thereby greatly improving the service life of the filter barrel, reducing the number of times the filter barrel is replaced, and reducing the cost of use. Description of the drawings:

[0021] Figure 1 It is a schematic diagram of the internal structure of the present invention;

[0022] Figure 2 It is a schematic diagram of gas flow in the filtering state of the present invention;

[0023] Figure 3 It is a schematic diagram of gas flow in the backwash state of the present invention;

[0024] Figure 4 It is a schematic diagram of disassembling the muffler cover in the present invention;

[0025] Figure 5 This is a schematic diagram of the internal structure of the present invention when the upper box is opened. Figure 1 ;

[0026] Figure 6 This is a schematic diagram of the internal structure of the present invention when the upper box is opened. Figure 2 ;

[0027] Figure 7 is a stereogram of the present invention;

[0028] Figure 8 It is a structural schematic diagram of the rotary backflush device in the present invention;

[0029] Fig. 9 is a cross-sectional view of a rotary backflush device in the present invention;

[0030] Fig.10 It is a schematic diagram of the structure of the cyclone device in the present invention. Specific implementation method:

[0031] The present invention is further described below in conjunction with specific embodiments and drawings.

[0032] See Figures 1 to 10As shown, a new type of self-cleaning air filtration equipment is provided, which includes: a chassis 1, a fan 2, a cyclone device 3, a filter barrel 4, a self-cleaning module 5, and a first dust box 6 and a second dust box 7 arranged below the cyclone device 3 and the filter barrel 4 and used to receive the filter residue; the cyclone device 3 divides the chassis 1 from top to bottom into a first cavity A, a second cavity B and a third cavity C, and the second cavity B in the middle of the cyclone device corresponds to the first air inlet 101 of the chassis 1; the chassis 1 is also provided with a fourth cavity D and a sixth cavity F for accommodating the filter barrel 4 and the self-cleaning module 5 respectively, and a fifth cavity E is provided between the fourth cavity D and the sixth cavity F for communication, and the inlet and outlet of the fan 2 are respectively located in the fifth cavity E and the sixth cavity F, and a first one-way valve 19 is provided between the first cavity A and the fourth cavity D for communication, and the sixth cavity F is connected to the first air outlet 102 of the chassis 1. The fan 2 is used to generate negative pressure suction in the chassis 1, and the external air is sucked in from the first air inlet 101 of the chassis 1. The air is first centrifugally separated by the cyclone device 3, and the large dust particles in the air are separated and fall into the first dust box 6. The air entering the fourth cavity D after filtration is filtered again by the filter barrel 4 and enters the fifth cavity E, and is drawn out by the fan 2 and discharged to the sixth cavity F, and finally discharged from the first air outlet 102, thereby realizing multiple filtration of the air; and when a certain thickness of dust is deposited on the filter barrel 4, a high-speed airflow is sprayed into the filter barrel 4 through the self-cleaning module 5 to produce a gas explosion, and the dust attached to the filter barrel 4 is blown into the second dust box 7 under the impact of the airflow, realizing the reverse flushing of the filter barrel 4, thereby greatly improving the service life of the filter barrel 4, reducing the number of replacements of the filter barrel 4, and reducing the cost of use. Of course, in order to ensure that the exhaust gas can smoothly enter the box 1, a blower can be added to the external pipeline of the first air inlet 101 to ensure that the air volume entering the chassis 1 can meet the demand.

[0033] The self-cleaning module 5 includes a rotating back-blowing device 51 located in the filter barrel 4 and capable of rotating, a gas tank 52 arranged in the chassis 1, a connecting hose 53 connecting the gas tank 52 and the rotating back-blowing device 51, a gas valve 54 arranged on the connecting hose 53, and an oil-water separator 55 arranged on the connecting pipe between the gas tank 52 and the external gas source. The gas tank 52 is used to store a sufficient amount of gas, and an oil-water separator 55 is arranged at the front end of the connection between the gas tank 52 and the gas source. The gas entering the gas tank 52 is separated from water vapor and filtered by the oil-water separator 55 to ensure that the air for backwashing cleaning does not contain moisture, so as to avoid water vapor from being sprayed onto the non-woven fabric of the filter barrel 4 with the backwashing gas, and to prevent the non-woven fabric from being affected by water and affecting normal filtration, thereby ensuring that backwashing will not cause damage to the filter barrel 4 and prolonging the service life of the filter barrel 4.

[0034] When backwashing is required, the gas in the gas storage tank 52 is controlled by the air valve 54 to be ejected from the rotary backwashing device 51 through the connecting hose 53. Since the high-pressure gas is ejected from the rotary backwashing device 51 into the filter barrel 4, the pressure will drop suddenly. In the process of air pressure release, thrust will be generated. When the thrust has an inclined angle with the rotation center, the rotary backwashing device 51 will be pushed to rotate. At the same time, the gas will produce a gas explosion during the rapid pressure release process to perform high-pressure air blowing and flushing on the filter barrel 4, thereby blowing the dust on the side wall of the filter barrel 4 into the second dust collecting box 7. In the high-speed rotation process of the rotary backwashing device 51, the high-speed airflow will continuously rotate to impact the outer wall of the filter barrel 4, realizing 360° flushing without dead ends.

[0035] The rotary back-blowing device 51 includes a support tube 511 that is connected to a hose 53 and extends into the filter barrel 4, and a rotary jet tube frame 512 that is rotatably mounted at the lower end of the support tube 511 and can eject airflow to the side. The rotary jet tube frame 512 is provided with at least two rows of vertically arranged jet holes 513. The two rows of jet holes 513 are centrally symmetrically located on both sides of the support tube 511. When high-pressure gas is ejected from the two rows of jet holes 513, the same reverse rotation thrust is generated, thereby causing the rotary jet tube frame 512 to rotate. Of course, in order to ensure that the rotary jet tube frame 512 can rotate smoothly, the jet holes 513 can be set to an inclined direction, so that when the jet holes 513 eject gas, a shear force can be generated relative to the support tube 511, so that the rotary jet tube frame 512 rotates more quickly.

[0036] The rotating jet pipe frame 512 includes a support rod 512A connected to the lower end of the support pipe 511, a connecting seat 512B sleeved on the upper end of the support rod 512A and capable of relatively rotating, a first exhaust pipe 512C and a second exhaust pipe 512D arranged at both ends of the connecting seat 512B and parallel to the support rod 512A, a connecting seat 512E sleeved on the lower end of the support rod 512A and used to connect and support the first exhaust pipe 512C and the second exhaust pipe 512D, and a supporting sleeve arranged between the connecting seat 512B and the connecting seat 512E and sleeved on the support rod 512A. 512F and a first bearing 512J and a second bearing 512K respectively arranged between the support rod 512A and the connecting seat 512B and the connecting seat 512E, wherein the jet holes 513 are arranged vertically on the first exhaust pipe 512C and the second exhaust pipe 512D, and the upper part of the support rod 512A is provided with a first inner through hole 512G connected to the support pipe 511 for air flow to pass through, and the connecting seat 512B is provided with a second inner through hole 512H and a third inner through hole 512I for connecting the first inner through hole 512G with the first exhaust pipe 512C and the second exhaust pipe 512D. The first exhaust pipe 512C, the second exhaust pipe 512D and the support sleeve 512F are metal parts, the connecting seat 512B and the connecting seat 512E are both injection molded parts, and the connecting seat 512B and the connecting seat 512E are injection molded at both ends of the first exhaust pipe 512C, the second exhaust pipe 512D and the support sleeve 512F by an integrated molding method. The ends of the first bearing 512J and the second bearing 512K are respectively mounted on the support rod 512A through retaining springs.

[0037] In the above, there are two embodiments of the support sleeve 512F:

[0038] The first one is that the support sleeve 512F is only mounted on the support rod 512A between the connecting seat 512B and the connecting seat 512E. In this state, the first bearing 512J is located between the connecting seat 512B and the support rod 512A, and the second bearing 512K is located between the connecting seat 512E and the support rod 512A.

[0039] The second type, the connecting seat 512B and the connecting seat 512E are injection molded on the outer wall of the supporting sleeve 512F, the supporting sleeve 512F completely penetrates the connecting seat 512B and the connecting seat 512E, and the supporting sleeve 512F is provided with ventilation holes corresponding to the second inner through hole 512H and the third inner through hole 512I connected to the first inner through hole 512G, and the first bearing 512J and the second bearing 512K are installed between the supporting sleeve 512F and the supporting rod 512A.

[0040] A first cover plate 514 is slidably mounted on the support tube 511, and the diameter of the first cover plate 514 is larger than the first connecting hole between the fourth cavity D and the fifth cavity E. A wind collecting hood 515 capable of being covered on the first cover plate 514 is mounted on the upper end of the support tube 511. A sleeve portion 514A capable of extending into the wind collecting hood 515 is provided on the upper end of the first cover plate 514. A pressure relief hole 51 for introducing airflow into the wind collecting hood 515 to push the first cover plate 514 downward to cover the first connecting hole is provided on the tube wall of the support tube 511, and a return spring 516 for lifting the first cover plate 514 to open the first connecting hole is also mounted on the support tube 511. By providing a sliding first cover plate 514 on the support tube 511, when high-pressure gas is introduced into the support tube 511, part of the gas will flow out from the pressure relief hole 51 into the wind collecting hood 515, so that the pressure generated in the wind collecting hood 515 pushes the first cover plate 514 to slide downward and cover the first connecting hole, thereby preventing the gas ejected from the jet hole 513 from flowing upward through the first connecting hole into the fifth cavity E, so as to facilitate the backwashing gas to flow out from the second one-way valve 15.

[0041] The support tube 511 is also provided with an inner liner frame 517 located in the first communication hole and used to cooperate with the first cover plate 514 to seal the first communication hole. The inner ring portion 517A of the inner liner frame 517 is fixedly connected to the support tube 511. A sealing ring 518 is sleeved on the outer ring portion 517B of the inner liner frame 517, and at least two first connecting plates 517C are provided between the inner ring portion 517A and the outer ring portion 517B. The inner ring portion 517A is formed with a threaded hole, wherein the lower end of the support tube 511 and the upper end of the support rod 512A are both spirally connected to the threaded hole of the inner ring portion 517A.

[0042] The chassis 1 is also provided with a second one-way valve 15 located beside the filter barrel 4 and used for quickly discharging gas when the rotating back-blowing device 51 blows air. A muffler cover 16 is provided outside the second one-way valve 15. The upper end of the muffler cover 16 is connected to the sixth cavity F. The first air outlet 102 of the chassis 1 is located at the upper end of the muffler cover 16. A seventh cavity G is formed in the muffler cover 16. The seventh cavity G is provided with muffler cotton. After the airflow flows out of the first air outlet 102 of the sixth cavity F, it will enter the muffler cover 16. The muffler cotton in the muffler cover 16 reduces the noise generated when the airflow flows out of the box 1. The gas valve 54 is a solenoid valve and has two switchable modes of timed gas explosion and manual gas explosion. The chassis 1 is provided with a selection switch 56 for switching between timed gas explosion and manual gas explosion. The chassis 1 is provided with a timer 57 for controlling the gas valve 54 to time gas explosion, and a pulse meter 58 located beside the timer 57.

[0043] The cyclone device 3 includes a second air inlet 31 located in the center and corresponding to the second cavity B, a plurality of second air outlets 32 and dust outlets 33 arranged on the periphery of the second air inlet 31 and facing upward and downward respectively, and a plurality of guide air ducts 34 connected to the central second air inlet 31 and spirally wound outwardly on the second air outlet 32 ​​one by one, wherein the second air outlet 32 ​​and the dust outlet 33 are respectively located in the first cavity A and the third cavity C, and the dust outlet 33 is funnel-shaped. The cyclone device 3 is provided with a plurality of them, and a first mounting plate 14 located between the first cavity A and the second cavity B and used for mounting the cyclone device 3 is provided in the chassis 1, and the first mounting plate 14 is installed obliquely so that the second air outlet 32 ​​faces the first one-way valve 19. A cyclone device 3 is used to divide the box body 1 into a first cavity A, a second cavity B and a third cavity C. When the airflow enters the box body 1 from the first air inlet 101, it will first enter the second air inlet 31 of the cyclone device 3 from the second cavity B, and then enter the centrifugal cavity between the dust exhaust port 33 and the second air outlet 32 ​​along a number of guide air ducts 34 on all sides. When the airflow enters the funnel-shaped centrifugal cavity under the guidance of the spiral guide air duct 34, a spiral vortex is generated, so that dust particles larger than 0.02 mm fall from the dust exhaust port 33 under the action of centrifugal force into the first dust collecting box 6 at the bottom of the third cavity C, and the gas passes through the second air outlet 32 ​​under the suction of the fan 2 to enter the first cavity A, thereby realizing centrifugal separation and filtration of the air.

[0044] By installing the cyclone device 3 obliquely in the chassis 1 and making the second air outlet 32 ​​face the first one-way valve 19, after the airflow passes through the first one-way valve 19, it will enter the fourth cavity D and be located at the periphery of the filter barrel 4, and the filter barrel 4 is vertically installed in the chassis 1. The cyclone device 3 is installed obliquely in the chassis 1, so that the second air outlet 32 ​​of the cyclone device 3 can be tilted toward the first one-way valve 19 on one side of the filter barrel 4, so that the air flowing out of the cyclone device 3 can quickly pass through the first one-way valve 19 from the periphery of the filter barrel 4 into the filter barrel 4, and at the same time, it can also ensure that the suction force generated by the fan 2 is smoothly transmitted to the cyclone device 3. Of course, the cyclone device 3 adopts a micro-cyclone device, which can filter finer dust.

[0045] The first air inlet 101 is provided with a first filter 8 for filtering large particles, and the first filter 8 is located between the first air inlet 101 and the second cavity B, and an inlet cavity 10 for accommodating large particles of debris is provided in the first air inlet 101. The first filter 8 intercepts large particles of debris and other debris mixed in the air to achieve the first layer of filtration.

[0046] The chassis 1 includes an upper box body 11 and a lower box body 12, wherein the fan 2 and the self-cleaning module 5 are located in the upper box body 11, the cyclone device 3 and the filter barrel 4 are located in the lower box body 12, the first dust box 6 and the second dust box 7 are symmetrically installed at the bottom of the lower box body 12 and can be pulled out to both sides respectively; an inner shell 13 is installed in the upper box body 11, which is covered above the filter barrel 4 and forms a fifth cavity E, the fan 2 is installed on the inner shell 13, and one end of the self-cleaning module 5 passes through the inner shell 13 and extends into the filter barrel 4. The filter barrel 4 is a HEPA filter barrel, the upper end outlet of the filter barrel 4 is connected to the fifth cavity E, and the rotating back-blowing device 51 of the self-cleaning module 5 extends from the upper end outlet of the filter barrel 4 into the filter barrel 4, and the air flowing out through the second air outlet 32 ​​of the cyclone device 3 enters the first cavity A, and then enters the fourth cavity D after passing through the first one-way valve 19, and enters the filter barrel 4 from the periphery of the filter barrel 4 to achieve the third filtration. At this time, the dust is intercepted and deposited on the outer side wall of the filter barrel 4. When the self-cleaning module 5 sprays high-pressure airflow into the filter barrel 4, the dust deposited on the outer wall of the filter barrel 4 will be blown down into the second dust box 7 at the bottom of the second cavity B, thereby achieving self-cleaning of the filter barrel 4. The fan 2 adopts a permanent magnet brushless DC motor, which is more efficient and energy-saving.

[0047] The rear end face of the upper box body 11 is provided with a latch hole 111 for installing the silencer 16, and the silencer 16 is provided with a latch block 161 that matches the latch hole 111 and can be inserted and buckled, wherein two latch holes 111 and two latch blocks 161 are provided correspondingly, and are located at both ends of the inner side of the silencer 16, and the silencer 16 is also provided with a first handle 162 for easy lifting. The front end face of the lower box body 12 is provided with a visual panel 121 for observing the use of the filter barrel 4, and the lower end sides of the lower box body 12 are respectively provided with a first buckle 122 and a second buckle 123 for buckling the first dust box 6 and the second dust box 7, wherein at least two first buckles 122 and second buckles 123 are provided, and correspond to the two sides of the first dust box 6 and the second dust box 7, respectively. The front end surface of the first dust box 6 is bent to form a circle of flanged portion 61, which is not only convenient for installing the first buckle 122, but also convenient for pulling out the first dust box 6. The rear ends of the upper box 11 and the lower box 12 are hinged, and the third buckle 125 and the fourth buckle 126 close to the front end and used for closing and locking are arranged on both sides of the upper box 11 and the lower box 12, and the front end surface of the upper box 11 is also provided with a second handle 110 for opening and closing.

[0048] In summary, the present invention has two working states, one is the air filtering part, and the other is the self-cleaning filter barrel state. The specific working methods are as follows:

[0049] First, during air filtering, the air with dust is sucked in through the first air inlet 101, and after the first filter screen 8 intercepts large objects and evenly distributes the air in the first air inlet 101, the gas enters the second cavity B; further, the four inclined cyclone devices 3 separate and filter the finer particles, and the dust particles larger than 0.01 mm fall from the dust outlet 33 into the first dust collecting box 6 of the third cavity C, and the air that has been pre-filtered by two layers enters the first cavity A through the second air outlet 32 ​​of the cyclone device 3, and enters the fourth cavity D after passing through the first one-way valve 19. A HEPA filter barrel 4 for fine filtration is provided in the fourth cavity D, and a cyclone is provided in the filter barrel 4. A sealed rotary back-blowing device 51 is provided, and a second one-way valve 15 is arranged at the rear of the fourth cavity D, so that the back-blown gas can be discharged quickly. Of course, a HEPA filter barrel can be added at the first air outlet 102 to meet the harsh environmental requirements, and a second dust collecting box 7 is arranged below the fourth cavity D to receive the dust dropped from the filter barrel 4; further, the clean air after multiple filtration enters the fifth cavity E through the rotary back-blowing device 51, and the fifth cavity E is directly connected to the negative pressure fan 2, and then blows the clean air into the sixth cavity F, and after slow flow and silencing, enters the silencer 16 of the seventh cavity G, and finally discharges the clean and low-noise air to achieve the purpose of filtering and noise reduction.

[0050] Second, during the feedback self-cleaning, the commonly used compressed air is connected to the oil-water separator 55 for filtration and then connected to the gas cylinder 52. The other end of the gas cylinder 52 is connected to a large-sized air valve 54. The air valve 54 is controlled by an electromagnetic coil and can switch between two modes: timed gas explosion and manual gas explosion. When the air valve 54 is energized, the valve is opened instantly to release the air in the gas cylinder 52 instantly, and the air is rushed into the rotary back-blowing device 51 through the connecting hose 53. Driven by the pressure, the first cover plate 514 of the rotary back-blowing device 51 presses the filter barrel 4 downward to form a closed space. The compressed air generates positive pressure in the filter barrel 4, and cooperates with the rotary back-blowing device 51 to comprehensively clean the filter barrel 4, so that the filter barrel remains unobstructed for a long time, and the replacement frequency is reduced, thereby saving cost and time.

[0051] Of course, the above description is only a specific embodiment of the present invention and is not intended to limit the scope of implementation of the present invention. All equivalent changes or modifications made according to the structure, characteristics and principles described in the patent application scope of the present invention should be included in the patent application scope of the present invention.

Claims

1. A new self-cleaning air filtration device, characterized in that: include: A chassis (1), a fan (2), a cyclone device (3), a filter barrel (4), a self-cleaning module (5), and a first dust collection box (6) and a second dust collection box (7) arranged below the cyclone device (3) and the filter barrel (4) and used for receiving filter residues; The cyclone device (3) divides the case (1) from top to bottom into a first cavity (A), a second cavity (B) and a third cavity (C), and the second cavity (B) in the middle of the cyclone device (3) corresponds to the first air inlet (101) of the case (1); The chassis (1) is also provided with a fourth cavity (D) and a sixth cavity (F) for accommodating the filter barrel (4) and the self-cleaning module (5) respectively; a fifth cavity (E) is provided between the fourth cavity (D) and the sixth cavity (F) for communication; the inlet and outlet of the fan (2) are respectively located in the fifth cavity (E) and the sixth cavity (F); a first one-way valve (19) is provided between the first cavity (A) and the fourth cavity (D) for communication; and the sixth cavity (F) is connected to the first air outlet (102) of the chassis (1).

2. A novel self-cleaning air filtration device according to claim 1, characterized in that: The self-cleaning module (5) comprises a rotating back-blowing device (51) located in the filter barrel (4) and capable of rotating, an air storage tank (52) arranged in the chassis (1), a connecting hose (53) connecting the air storage tank (52) and the rotating back-blowing device (51), an air valve (54) arranged on the connecting hose (53), and an oil-water separation device (55) arranged on a connecting pipe between the air storage tank (52) and an external air source.

3. A novel self-cleaning air filtration device according to claim 2, characterized in that: The rotary back-blowing device (51) comprises a support pipe (511) which is butt-connected to a hose (53) and extends into the filter barrel (4), and a rotary jet pipe frame (512) which is rotatably mounted on the lower end of the support pipe (511) and is capable of jetting air to the side, wherein at least two rows of vertically arranged jet holes (513) are provided on the rotary jet pipe frame (512).

4. A novel self-cleaning air filtration device according to claim 3, characterized in that: A first cover plate (514) is slidably mounted on the support tube (511), the diameter of the first cover plate (514) being larger than the first connecting hole between the fourth cavity (D) and the fifth cavity (E), an air collecting hood (515) capable of being mounted on the first cover plate (514) is mounted on the upper end of the support tube (511), a sleeve portion (514A) capable of extending into the air collecting hood (515) is disposed on the upper end of the first cover plate (514), a pressure relief hole (51) for allowing air flow into the air collecting hood (515) to push the first cover plate (514) downward to cover the first connecting hole is disposed on the tube wall of the support tube (511), and a return spring (516) for lifting the first cover plate (514) to open the first connecting hole is also mounted on the support tube (511).

5. A novel self-cleaning air filter device according to claim 2, characterized in that: The chassis (1) is also provided with a second one-way valve (15) located beside the filter barrel (4) and used for quickly discharging gas when the rotating back-blowing device (51) blows air. A silencer cover (16) is provided on the outer side of the second one-way valve (15). The upper end of the silencer cover (16) is connected to the sixth cavity (F). The first air outlet (102) of the chassis (1) is located at the upper end of the silencer cover (16).

6. A novel self-cleaning air filtration device according to claim 2, characterized in that: The gas valve (54) is a solenoid valve and has two switchable modes: timed gas explosion and manual gas explosion. The chassis (1) is provided with a selection switch (56) for switching between timed gas explosion and manual gas explosion. The chassis (1) is provided with a timer (57) for controlling the gas valve (54) to produce a timed gas explosion, and a pulse meter (58) located next to the timer (57).

7. A novel self-cleaning air filter device according to any one of claims 1 to 6, characterized in that: The cyclone device (3) comprises a second air inlet (31) located in the center and corresponding to the second cavity (B), a plurality of second air outlets (32) and dust exhaust ports (33) arranged on the periphery of the second air inlet (31) and facing upward and downward respectively, and a plurality of guide air ducts (34) connected to the central second air inlet (31) and spirally wound outwardly on the second air outlet (32) one by one, wherein the second air outlet (32) and the dust exhaust port (33) are respectively located in the first cavity (A) and the third cavity (C), and the dust exhaust port (33) is funnel-shaped.

8. A novel self-cleaning air filter device according to claim 7, characterized in that: The cyclone device (3) is provided with a plurality of them. A first mounting plate (14) is provided in the chassis (1) and is located between the first cavity (A) and the second cavity (B) and is used to mount the cyclone device (3). The first mounting plate (14) is installed at an angle so that the second air outlet (32) faces the first one-way valve (19).

9. A novel self-cleaning air filter device according to claim 7, characterized in that: A first filter (8) for filtering large particles is provided in the first air inlet (101); the first filter (8) is located between the first air inlet (101) and the second cavity (B); and an inlet cavity (10) for accommodating large particles is provided in the first air inlet (101).

10. A novel self-cleaning air filter device according to any one of claims 1 to 6, characterized in that: The case (1) comprises an upper case (11) and a lower case (12), wherein the fan (2) and the self-cleaning module (5) are located in the upper case (11), the cyclone device (3) and the filter barrel (4) are located in the lower case (12), and the first dust box (6) and the second dust box (7) are symmetrically mounted on the bottom of the lower case (12) and can be respectively withdrawn to both sides; an inner shell (13) is mounted in the upper case (11) and is arranged above the filter barrel (4) to form a fifth cavity (E); the fan (2) is mounted on the inner shell (13), and one end of the self-cleaning module (5) passes through the inner shell (13) and extends into the filter barrel (4).

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