Self-cleaning air filter device

Abstract

The application discloses a self-cleaning air filtering device, which comprises a filtering shell, a filtering assembly, a dredging assembly and a dust catching assembly. The filtering assembly comprises a partition plate and a filter barrel. The dredging assembly comprises a dredging disc and a first driving assembly for driving the dredging disc to move along the axial direction of the dredging disc. The dredging disc is provided with a plurality of jet flow channels arranged in an annular array. The dust catching assembly comprises a dust collecting cylinder, a flat plate, a sealing ring and a dust catching sleeve. A second driving assembly is arranged to drive the sealing ring to move between a sealing position and a dust catching position. The self-cleaning air filtering device drives the sealing ring to move upward by the second driving assembly to stretch the dust catching sleeve, and drives the dredging disc to move by the second driving assembly to clean the filter barrel from the inside. The self-cleaning air filtering device can enlarge the cleaning range, improve the cleaning effect, and make the blown particles be caught by the dust catching sleeve. Then, the sealing ring moves downward to make the dust catching sleeve enter the isolation cavity, so that the particles are prevented from mixing with the air entering the air inlet cavity, the dust concentration is reduced, and the filtering efficiency is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of air filtration, in particular to a self-cleaning air filter. BACKGROUND

[0002] The air filter is an air filter device that captures dust particles from gas-solid two-phase through the action of porous filter material, so that the gas is purified, and is usually used in clean workshops and laboratories.

[0003] Generally, a filter screen is used as a filter element inside the air filter, and the air is purified by capturing dust particles in the air. As the running time increases, the particles attached to the surface of the filter screen increase, affecting the air flow. In order to ensure the air filtration efficiency, the filter screen needs to be cleaned. Currently, clean air is used to blow from the air outlet side to the filter screen to blow off the particles attached to the surface of the filter screen. However, when the filter screen is cleaned in the above-mentioned manner, the blown-off particles still remain inside the air filter device. When the dust-containing gas is again introduced into the air filter, the above-mentioned particles are easily carried away with the incoming air flow, which further increases the dust concentration of the dust-containing gas, so that the blown-off particles are again attached to the surface of the filter screen. Thus, the device needs to clean the filter screen frequently, which further reduces the filtration efficiency of the air filter. Furthermore, due to the large filtration area of the filter screen, when the particles on part of the filter holes of the filter screen are blown off during reverse cleaning of the filter screen, the clean gas used to clean the filter screen is easily passed through the above-mentioned filter holes, and cannot act on other filter hole positions blocked by particles, thereby affecting the cleaning effect of the filter screen.

[0004] Therefore, it is necessary to improve the air filter device in the prior art. SUMMARY

[0005] The present application aims to overcome the defects in the prior art and provide a self-cleaning air filter device that improves the cleaning effect and increases the cleaning efficiency.

[0006] To achieve the above technical effects, the technical scheme of the present application is as follows: a self-cleaning air filter device, comprising:

[0007] A filter shell is provided with an air inlet and an air outlet on the side wall, and a dust discharge port is provided at the bottom, and the dust discharge port is connected with a dust discharge valve;

[0008] A filter assembly comprises a partition plate fixed in the filter shell and a filter barrel arranged on the partition plate in the vertical direction, and the partition plate, the inner wall of the filter shell and the inner wall of the filter barrel form a purification cavity in communication with the air outlet, and the partition plate, the inner wall of the filter shell and the outer side wall of the filter barrel form an air inlet cavity in communication with the air inlet and the dust discharge port;

[0009] A dredging assembly comprising a dredging disc axially consistent with the filter barrel and a first driving assembly driving the dredging disc to move along its own axial direction, the moving path of the dredging disc comprising a dredging section arranged in the filter barrel, and a jet flow channel arranged in an annular array on the dredging disc, the jet flow channel being communicated with the purification cavity through a first air pump and extending to the circumferential outer edge of the dredging disc.

[0010] A dust catching assembly comprising a dust collecting cylinder fixedly arranged below the filter barrel and extending along the vertical direction, a flat plate having an annular gap with the circumferential inner wall of the dust collecting cylinder, a sealing ring arranged above the annular gap, and a dust catching sleeve fixed between the sealing ring and the dust collecting cylinder and being elastic, the horizontal projection of the filter barrel being arranged inside the horizontal projection of the sealing ring.

[0011] A second driving assembly driving the sealing ring to move along the vertical direction between a sealing position and a dust catching position, the sealing ring at the sealing position and the flat plate and the filter barrel forming a separation cavity accommodating the dust catching sleeve and being separated from the air inlet, the sealing ring at the dust catching position stretching the dust catching sleeve upward so that the circumferential inner wall of the dust catching sleeve is in gap cooperation with the circumferential outer edge of the filter barrel, and the filter shell is further provided with a dust discharging port connected with a dust discharging valve.

[0012] Preferably, in order to facilitate the lifting and lowering movement of the sealing ring, the end of the dust catching sleeve away from the sealing ring is connected with a bottom frame fixedly connected with the dust collecting cylinder, the dust catching sleeve comprises a dust catching inner sleeve and a dust catching outer sleeve sleeved outside the dust catching inner sleeve and having a lower air charging cavity with the dust catching inner sleeve, the second driving assembly comprises a lower air charging passage communicated between the air inlet and the lower air charging cavity, and the lower air charging passage is provided with a lower air charging valve, and the air inlet is used for connecting a second air pump.

[0013] Preferably, in order to fix the moving direction of the sealing ring, an outer guide rod extending along the vertical direction and in sliding cooperation with the sealing ring is fixed in the air inlet.

[0014] Preferably, in order to facilitate the movement of the dredging disc, the dredging disc is connected with the inner top wall of the filter shell through an elastic air charging inner sleeve, the jet flow channel is communicated with the output end of the first air pump through the inner cavity of the air charging inner sleeve, the air charging inner sleeve is sleeved with an air charging outer sleeve having two ends connected with the dredging disc and the inner top of the filter shell and being elastic, an upper air charging cavity is formed between the air charging inner sleeve and the air charging outer sleeve, and the first driving assembly comprises an upper air charging passage communicated between the air inlet and the upper air charging cavity, and the upper air charging passage is provided with an upper air charging valve.

[0015] Preferably, in order to fix the moving direction of the dredging disc, the filter barrel is fixedly connected with an inner guide rod which is along the vertical direction and is in sliding fit with the dredging disc.

[0016] Preferably, in order to ensure the stable directional movement of the dredging disc and the sealing ring, the upper inflation cavity and the lower inflation cavity are both inflation cavities extending along the vertical direction, the length of the upper inflation cavity is positively correlated with the amount of gas in the upper inflation cavity, and the length of the lower inflation cavity is positively correlated with the amount of gas in the lower inflation cavity; the gas inlet is used for connecting the second air pump.

[0017] Preferably, in order to strengthen the dust capturing capacity and facilitate the discharge of the captured dust particles, the isolation cavity is a liquid storage cavity, the filter shell is further provided with a liquid injection port and a liquid outlet port which are in communication with the isolation cavity, and the dust discharge valve is a liquid outlet valve connected with the liquid outlet port.

[0018] Preferably, in order to improve the filtering efficiency, the filter barrel, the dredging assembly and the dust capturing assembly are all provided with at least two and one-to-one corresponding air injection pipes, and the output end of the first air pump is connected with at least two air injection pipes which are one-to-one corresponding to the filter barrel and are provided with air injection valves.

[0019] Preferably, in order to facilitate the detection of the filter barrel blockage condition, the top end of the moving path of the dredging disc is arranged adjacent to the top of the dredging disc, and the dredging disc is provided with a gas flow sensor.

[0020] Preferably, in order to facilitate the moving position of the dredging disc and the sealing ring, the gas inlet is provided with a gas inlet pipe, the gas inlet pipe is provided with a gas inlet valve, the gas inlet pipe is in communication with the upper inflation passage at the side of the gas inlet valve away from the filter shell, and the gas inlet pipe is in communication with the lower inflation passage at the side of the gas inlet valve away from the filter shell.

[0021] In summary, compared with the prior art, the self-cleaning air filter device of the present application drives the sealing ring to move upward to stretch the dust capturing sleeve through the second driving assembly, and drives the dredging disc to move through the second driving assembly to clean the filter barrel from the inside, so as to expand the cleaning range, improve the cleaning effect, make the blown particles be captured by the dust capturing sleeve, then make the dust capturing sleeve enter the isolation cavity through the downward movement of the sealing ring, avoid the mixing of the particles and the air entering the air inlet cavity, reduce the dust concentration, and improve the filtering efficiency. BRIEF DESCRIPTION OF DRAWINGS

[0022] Figure 1 is a structural schematic view of the present application;

[0023] Figure 2 is a front view of Figure 1 ;

[0024] Figure 3 is an A-A sectional view of Figure 2 ;

[0025] Figure 4 is a sectional view taken along line B-B of FIG. 1; Figure 2

[0026] Figure 5 is an enlarged view of portion A of FIG. 1; Figure 4

[0027] Figure 6 is an exploded view of FIG. 1; Figure 1

[0028] Figure 7 is a structural view of another aspect of the present application;

[0029] Figure 8 is a partial structural view of FIG. 1; Figure 1

[0030] Figure 9 is an exploded view of FIG. 1; Figure 8

[0031] Figure 10 is an exploded view of another aspect of the present application; Figure 8

[0032] Figure 11 is a structural view of a dust catching cover of the present application;

[0033] Figure 12 is a structural view of a filter barrel, a dredging disk and a first driving assembly of the present application;

[0034] Figure 13 is a structural view of FIG. 1; Figure 12

[0035] Figure 14 is a structural view of an air inflating inner cover and an air inflating outer cover of the present application and a plan view thereof;

[0036] Figure 15 is a sectional view taken along line C-C of FIG. 1; Figure 14

[0037] ​​​​​​​​In the diagram: 100, Filter housing; 101, Housing body; 102, Top plate; 103, Bottom plate; 104, Support legs; 200, Partition plate; 300, Filter barrel; 301, Filter holes; 400, Unclogging disc; 401, Upper disc; 402, Lower disc; 500, First air pump; 600, Dust collection cylinder; 700, Flat plate; 800, Sealing ring; 900, Dust collection sleeve; 901, Inner dust collection sleeve; 902, Outer dust collection sleeve; 110, Air inlet chamber; 120, Purification chamber; 130, Isolation chamber; 140, Base frame; 150, Lower inflation chamber; 1 60. Upper inflation chamber; 170. Outer guide rod; 180. Inflation inner sleeve; 190. Inflation outer sleeve; 210. Inner guide rod; 220. Gas flow sensor; 230. Inlet pipe; 231. Inlet valve; 232. Upper inflation branch pipe; 233. Lower inflation branch pipe; 240. Outlet pipe; 250. Ash discharge pipe; 251. Ash discharge valve; 260. Connecting ring; 270. Lower inflation pipe; 271. Lower inflation valve; 280. Upper inflation pipe; 281. Upper inflation valve; 290. Liquid injection pipe; 291. Liquid inlet pipe; 310. Liquid outlet pipe; 311. Ash discharge valve; 312. Liquid discharge pipe; 320. Air jet pipe; 321. Air jet valve; 330. Lower inflation T-shaped pipe; 331. Support; 340. Lower inflation bottom pipe; 350. Upper inflation connecting pipe. Detailed Implementation

[0038] The specific embodiments of the present invention will be further described below with reference to the accompanying drawings and examples. The following examples are only used to more clearly illustrate the technical solutions of the present invention and should not be construed as limiting the scope of protection of the present invention.

[0039] like Figures 1-15 As shown, the self-cleaning air filtration device of the present invention includes:

[0040] The filter housing 100 has an air inlet and an air outlet on its side wall and an ash discharge port at its bottom, which is connected to an ash discharge valve 251.

[0041] The filter assembly includes a partition 200 fixed inside the filter housing 100 and a filter barrel 300 arranged vertically on the partition 200. The partition 200, the inner wall of the filter housing 100 and the inner wall of the filter barrel 300 enclose a purification chamber 120 that communicates with the air outlet. The partition 200, the inner wall of the filter housing 100 and the outer wall of the filter barrel 300 enclose an air inlet chamber 110 that communicates with the air inlet and the ash discharge port.

[0042] The dredging assembly comprises a dredging disc 400 axially consistent with the filter barrel 300 and a first driving assembly driving the dredging disc 400 to move along the axial direction of the dredging disc 400, and the moving path of the dredging disc 400 comprises a dredging section arranged in the filter barrel 300, and a plurality of jet flow channels are arranged in an annular array on the dredging disc 400, the jet flow channels are communicated with the purification cavity 120 through the first air pump 500 and extend to the circumferential outer edge of the dredging disc 400;

[0043] The dust catching assembly comprises a dust collecting cylinder 600 fixedly arranged below the filter barrel 300 and extending along the vertical direction, a flat plate 700 having an annular gap with the circumferential inner wall of the dust collecting cylinder 600, a sealing ring 800 arranged above the annular gap, and a dust catching sleeve 900 fixedly arranged between the sealing ring 800 and the dust collecting cylinder 600 and being elastic, and the horizontal plane projection of the filter barrel 300 is arranged inside the horizontal plane projection of the sealing ring 800.

[0044] The second driving assembly drives the sealing ring 800 to move along the vertical direction between a sealing position and a dust catching position, the sealing ring 800 at the sealing position is enclosed with the flat plate 700 and the filter barrel 300 to form a separation cavity 130 accommodating the dust catching sleeve 900 and being separated from the air inlet, and the sealing ring 800 at the dust catching position stretches the dust catching sleeve 900 upwards so that the circumferential inner wall of the dust catching sleeve 900 is in gap cooperation with the circumferential outer edge of the filter barrel 300, and the filter shell 100 is further provided with a dust discharging port connected with a dust discharging valve 311.

[0045] In use, the self-cleaning air filtering device of the present application is used, the external dust-containing gas is introduced into the air inlet cavity 110 inside the filter shell 100 through the air inlet by the air inlet device such as a fan, the dust-containing gas flows in the air inlet cavity 110 and contacts the circumferential outer edge of the filter barrel 300, the dust-containing gas is filtered through the filter holes 301 on the circumferential outer edge of the filter barrel 300, so that the particulate matters are blocked on the outer surface of the filter barrel 300, and the clean air enters the inside of the filter barrel 300 through the filter holes 301 and then enters the purification cavity 120, and then the filtered air is discharged through the air outlet; during the air filtering process, part of the air is attached to the surface of the filter barrel 300, and part of the air falls on the inner bottom wall of the filter shell 100, when the device is no longer used for filtering air, the dust discharging valve 251 can be opened to discharge the particles settled on the inner bottom of the filter shell 100 through the dust discharging port.

[0046] With the increase of the device filtering time, the dust on the surface of the filter barrel 300 increases, causing poor air circulation and affecting the air filtration efficiency, at this time the second driving assembly acts to drive the sealing ring 800 to move upward to the dust catching position, so that the dust catching sleeve 900 is stretched into a cylindrical structure with a gap between the circumferential inner wall and the circumferential outer edge of the filter barrel 300, surrounding and isolating the filter barrel 300, in the present application, when the sealing ring 800 moves upward to the dust catching position, it abuts against the lower side of the partition plate 200, and then the first driving assembly drives the dredging disc 400 to enter the inside of the filter barrel 300 along the vertical direction, at the same time, the first air pump 500 draws clean air from the purification cavity 120 and delivers it into the air jet flow channel of the dredging disc 400, and then the clean air is sprayed from the air jet flow channel and acts on the inner wall of the filter barrel 300, blowing off the particles adhering to the surface of the filter barrel 300, at the same time, the cleaning range of the filter barrel 300 is expanded by the lifting movement of the dredging disc 400, avoiding that part of the filter holes 301 on the surface of the filter barrel 300 are not cleaned, thereby ensuring the cleaning effect of the filter barrel 300.

[0047] Furthermore, during the cleaning of the filter barrel 300, the dust catching sleeve 900 is stretched and deformed upward with the movement of the sealing ring 800, becoming a cylindrical structure with a gap with the filter barrel 300, keeping the filter barrel 300 warm at the same time, and the dust particles blown off from the filter barrel 300 adhere to the inner wall of the dust catching sleeve 900, after the cleaning of the filter barrel 300 is completed, the second driving assembly drives the sealing ring 800 to descend to the sealing position, the sealing ring 800 forms an isolation cavity 130 with the flat plate 700 and the filter barrel 300, the dust catching sleeve 900 is accommodated in the isolation cavity 130 at the same time, since the isolation cavity 130 is separated from the air inlet, it avoids that the dust-containing gas entering the air inlet into the air inlet cavity 110 enters the isolation cavity 130, preventing the dust particles trapped on the dust catching sleeve 900 in the isolation cavity 130 from mixing into the air in the air inlet cavity 110, and then the ash discharge valve 311 is opened, facilitating the discharge of the dust particles trapped on the dust catching sleeve 900 in the isolation cavity 130 to the outside through the ash discharge port. By using the above technology, on the basis of expanding the cleaning range of the filter barrel 300 and improving the cleaning effect of the filter barrel 300, the dust particles falling from the surface of the filter barrel 300 are trapped by the dust catching sleeve 900 at the same time of cleaning the filter barrel 300, and then the dust catching sleeve 900 is accommodated in the isolation cavity 130 and discharged through the ash discharge port, avoiding the dust particles mixing into the air entering the air inlet cavity 110 through the air inlet, causing the increase of the dust particle concentration, thus also reducing the frequency of cleaning the filter barrel 300, thereby being conducive to improving the air filtration efficiency.

[0048] In the present application, as Figures 1-4 , Figure 6 and Figure 7As shown, the filter shell 100 comprises a shell body 101 extending in the vertical direction, a top plate 102 is fixedly connected to the top of the shell body 101, a bottom plate 103 is fixedly connected to the bottom of the shell body 101, and a support leg 104 is fixed below the bottom plate 103 to support the filter shell 100; a partition plate 200 is horizontally arranged, and the circumferential outer edge of the partition plate 200 is fixedly connected to the inner wall of the shell body 101, the partition plate 200 is provided with a mounting hole, a filter barrel 300 is sealingly arranged inside the mounting hole, and the top of the filter barrel 300 is provided with an outward flange, which is fixed above the partition plate 200; the air inlet and the air outlet are arranged on the side wall of the shell body 101 to communicate with the inner cavity of the shell body 101, the ash discharge port is arranged on the bottom plate 103, the air inlet is fixed with an air inlet pipe 230 for introducing dust-containing gas into the filter shell 100, the air outlet is fixed with an air outlet pipe 240 for discharging clean gas purified by the filter barrel 300, and the ash discharge port is fixed with an ash discharge pipe 250, which is provided with an ash discharge valve 251, the bottom plate 103 is in the shape of a long strip, and the two ends are inclined downward to the center position, the ash discharge port and the ash discharge pipe 250 are connected to the center position of the bottom plate 103, so that the dust particles falling on the bottom plate 103 can slide along the inclined end of the bottom plate 103 to the ash discharge port at the center position and then enter the ash discharge pipe 250, and when the ash discharge valve 251 is opened, the dust particles accumulated in the ash discharge pipe 250 can be discharged to the outside.

[0049] In order to ensure the cleaning effect of the dredging disc 400 on the filter barrel 300 during the lifting movement, the filter barrel 300 is in the shape of a cylinder, and the dredging disc 400 is in the shape of a disc, the coaxial line of the dredging disc 400 and the filter barrel 300 is the same, and the outer diameter of the dredging disc 400 is smaller than the inner diameter of the filter barrel 300, when the first driving assembly drives the dredging disc 400 to enter the inside of the filter barrel 300, the circumferential outer edge of the dredging disc 400 is in clearance fit with the circumferential inner wall of the filter barrel 300. Figure 13As shown, the dredging disc 400 includes the upper disc 401 and the lower disc 402 fixedly connected with coaxial center lines and consistent outer diameters, the upper disc 401 is located directly above the lower disc 402, the upper disc 401 is provided with a gas injection through hole coaxial with the coaxial center line in the thickness direction of the upper disc 401, the bottom surface of the upper disc 401 is arranged with a plurality of upper grooves in a ring array, the two ends of the upper grooves extend to the upper through hole and the circumferential outer edge of the upper disc 401 respectively, the bottom surface of the lower disc 402 is arranged with a plurality of lower grooves in a ring array, one end of the plurality of lower grooves is communicated with each other, and the other end extends to the circumferential outer edge of the lower disc 402, the upper grooves and the lower grooves are arranged in one-to-one correspondence and opposite to each other, and the upper grooves and the lower grooves combine to form a gas injection flow channel, which is communicated with the output end of the first air pump 500 through the gas injection through hole, when the filter barrel 300 is cleaned, the first air pump 500 extracts clean air in the purification cavity 120, and delivers the clean air to the gas injection flow channel through the gas injection through hole, and the clean gas is sprayed along the gas injection flow channel and acts on the inner wall of the filter barrel 300, blows off the dust particles attached to the filter holes 301 of the filter barrel 300, and the first driving assembly drives the dredging disc 400 to move in the vertical direction, expands the action range of the clean gas sprayed from the gas injection flow channel of the dredging disc 400, and improves the cleaning effect of the filter barrel 300.

[0050] Further improvement is that the dust catching sleeve 900 is connected with the bottom frame 140 fixedly connected with the dust collecting cylinder 600 at one end away from the sealing ring 800, the dust catching sleeve 900 includes a dust catching inner sleeve 901 and a dust catching outer sleeve 902 sleeved outside the dust catching inner sleeve 901 and having the lower air charging cavity 150 between the dust catching inner sleeve 901 and the dust catching outer sleeve 902, the second driving assembly includes a lower air charging passage communicated between the air inlet and the lower air charging cavity 150, the lower air charging passage is provided with a lower air charging valve 271, and the outer guide rod 170 extending in the vertical direction and slidingly matched with the sealing ring 800 is fixed in the air inlet cavity 110; the air inlet is used to connect the second air pump (not shown in the figure).

[0051] When the sealing ring 800 needs to be driven to move up and down to adjust the stretching amount of the dust collection inner sleeve 901, the air in the air inlet pipe 230 is introduced into the space between the dust collection inner sleeve 901 and the dust collection outer sleeve 902 through the second air pump and the lower air charging channel, so that the air is filled into the lower air charging cavity 150 to facilitate the movement of the dust collection inner sleeve 901 and the dust collection outer sleeve 902 in the vertical direction. The outer guide rod 170 guides the movement direction of the sealing ring 800, so that the sealing ring 800 moves smoothly along the vertical direction between the sealing position and the dust collection position. When the sealing ring 800 moves to the sealing position, the dust collection inner sleeve 901 is stretched into a cylindrical shape, and the dust collection inner sleeve 901 is in clearance fit with the circumferential outer edge of the filter barrel 300. In this way, when the clean gas is sprayed out of the air jet channel to blow off the dust particles on the surface of the filter barrel 300, the dust collection inner sleeve 901 can collect the blown-off dust particles to prevent the dust particles from mixing into the dust-containing gas entering the air inlet cavity 110. In addition, the dust collection outer sleeve 902 can also collect part of the dust particles in the dust-containing gas entering the air inlet cavity 110. Then, the second air pump extracts the air in the lower air charging cavity 150 through the lower air charging channel, so that the lower air charging cavity 150 shrinks in size and drives the sealing ring 800 to move downward. After the dust collection inner sleeve 901 and the dust collection outer sleeve 902 enter the isolation cavity 130, the ash discharge valve 311 is opened to facilitate the discharge of the dust particles collected by the dust collection inner sleeve 901 and the dust collection outer sleeve 902 through the ash discharge port.

[0052] The specific structure is shown in Figure 1 、 Figure 5 、 Figures 8-11 The lower air charging channel includes a lower air charging branch pipe 233 integrally formed below the air inlet pipe 230 and in communication with the pipe cavity of the air inlet pipe 230. The bottom end of the lower air charging branch pipe 233 is in communication with the bottom of the lower air charging bottom pipe 340 through the lower air charging pipe 270. The lower air charging bottom pipe 340 penetrates the bottom plate 103 and is fixedly connected with the lower air charging T-shaped pipe 330 arranged above the bottom plate 103. The bottom end of the lower air charging T-shaped pipe 330 is in communication with the top end of the lower air charging bottom pipe 340, and the other two ends are fixedly connected with the dust collection inner sleeve 901 and in communication with the lower air charging cavity 150. The bottom ends of the dust collection inner sleeve 901 and the dust collection outer sleeve 902 are fixedly connected with the bottom bracket 140, and the lower air charging cavity 150 is formed by the dust collection inner sleeve 901, the dust collection outer sleeve 902, the bottom bracket 140 and the sealing ring 800. The position of the sealing ring 800 is adjusted by the stretching and contraction of the dust collection inner sleeve 901 and the dust collection outer sleeve 902 in the vertical direction. The dust collection inner sleeve 901 and the dust collection outer sleeve 902 are both elastic sleeves, and the production materials include but are not limited to rubber, silicone or latex, so as to ensure the stretching and contraction of the dust collection inner sleeve 901 and the dust collection outer sleeve 902.

[0053] When the second air pump inflates the lower inflation cavity 150, the external air enters the lower inflation cavity 150 through the air inlet pipe 230, the lower inflation branch pipe 233, the lower inflation pipe 270 and the lower inflation bottom pipe 340 in turn, so that the size of the lower inflation cavity 150 increases and the length increases; conversely, when the air is pumped out, the air flows from the lower inflation cavity 150 to the air inlet pipe 230 in the opposite direction of the above flow direction.

[0054] The bottom bracket 140 is fixedly connected to the bottom of the lower inflation T-shaped pipe 330, the top of the lower inflation T-shaped pipe 330 is fixedly connected with a support 331, the support 331 is fixed below the flat plate 700, and the support 331 supports the flat plate 700. As the amount of air in the lower inflation cavity 150 decreases, the sealing ring 800 is lowered to the sealing position, and is sealingly connected with the top surface of the flat plate 700 and the top of the dust collecting cylinder 600, and an isolation cavity 130 is formed, preventing dust particles collected by the dust collecting inner sleeve 901 and the dust collecting outer sleeve 902 from mixing into the dust-containing gas entering the air inlet cavity 110.

[0055] The outer guide rod 170 is arranged outside the dust collecting cylinder 600, and the bottom end and the top end are fixedly connected with the bottom plate 103 and the partition plate 200. The sealing ring 800 is slidably sleeved on the outer guide rod 170, so as to fix the moving direction of the sealing ring 800.

[0056] Further improvement is that the dredging disc 400 is connected with the inner top wall of the filter shell 100 through the elastic inflation inner sleeve 180, the jet flow channel is communicated with the output end of the first air pump 500 through the inner cavity of the inflation inner sleeve 180, the inflation inner sleeve 180 is sleeved with an elastic inflation outer sleeve 190 having two ends connected with the dredging disc 400 and the inner top of the filter shell 100, and there is an upper inflation cavity 160 between the inflation inner sleeve 180 and the inflation outer sleeve 190. The first driving assembly includes an upper inflation passage communicated between the air inlet and the upper inflation cavity 160, and an upper inflation valve 281 is arranged on the upper inflation passage. The filter barrel 300 is fixedly connected with an inner guide rod 210 which is vertically arranged and slidably matched with the dredging disc 400.

[0057] After the above structure is adopted, when the dredging disc 400 needs to be driven to move up and down, the second air pump introduces the dust-containing air in the air inlet pipe 230 into the upper inflation cavity 160 between the inflation inner sleeve 180 and the inflation outer sleeve 190 through the upper inflation passage, so as to adjust the deformation amount of the inflation inner sleeve 180 and the inflation outer sleeve 190. Under the guidance of the inner guide rod 210, the dredging disc 400 moves in the vertical direction, and at the same time, the first air pump 500 sends the clean air in the purification cavity 120 to the inner cavity of the inflation inner sleeve 180, and then the clean air enters the jet flow channel of the dredging disc 400 through the jet hole of the upper disc 401, and is sprayed out from the jet flow channel, and acts on the inner wall of the filter barrel 300, and blows off the dust particles attached to the outer sidewall of the filter barrel 300 through the filter holes 301.

[0058] The specific structure is as follows: Figure 1 , Figure 3 , Figure 4 , Figure 6 , Figure 7 as well as Figures 12 to 15 As shown, the upper inflation channel includes an upper inflation branch pipe 232 integrally formed above the air inlet pipe 230 and communicating with the cavity of the air inlet pipe 230. The top end of the upper inflation branch pipe 232 is connected to the upper inflation connecting pipe 350 through the upper inflation pipe 280. The upper inflation pipe 280 and the upper inflation connecting pipe 350 are respectively fixed to the outer and inner sides of the shell 101 and are interconnected. The end of the upper inflation connecting pipe 350 away from the upper inflation pipe 280 is fixedly connected to the inflation outer sleeve 190 and communicates with the upper inflation cavity 160 between the inflation outer sleeve 190 and the inflation inner sleeve 180. The top and bottom ends of the inflation outer sleeve 190 and the inflation inner sleeve 180 are both A connecting ring 260 is fixedly connected. The upper inflation chamber 160 is formed by an inflation inner sleeve 180, an inflation outer sleeve 190, and two connecting rings 260. The upper connecting ring 260 is fixed below the top plate 102, and the lower connecting ring 260 is fixed above the upper plate 401. The two connecting rings 260 are coaxial with the upper plate 401. The inflation inner sleeve 180 and inflation outer sleeve 190 are made of the same material as the dust collection inner sleeve 901 and dust collection outer sleeve 902. The inner guide rod 210 seals and passes through the upper plate 401 and the lower plate 402. Its bottom end is fixedly connected to the inner bottom wall of the filter barrel 300, and its top end is fixedly connected to the top 102.

[0059] When air needs to be inflated into the upper inflation chamber 160, the second air pump introduces air sequentially through the air inlet pipe 230, the upper inflation branch pipe 232, and the upper inflation pipe 280 into the upper inflation chamber 160 between the inner inflation sleeve 180 and the outer inflation sleeve 190. This causes the inner inflation sleeve 180 and the outer inflation sleeve 190 to stretch vertically, thereby driving the drain plate 400 to descend. Conversely, after air is drawn out from the upper inflation chamber 160, the elastic inner inflation sleeve 180 and the outer inflation sleeve 190 contract upward, pulling the drain plate 400 downward. Under the guidance of the inner guide rod 210, the drain plate 400 achieves stable vertical movement.

[0060] After the first driving assembly and the second driving assembly adopt the above structure, the upper inflation cavity 160 and the lower inflation cavity 150 are both inflation cavities extending in the vertical direction, the length of the upper inflation cavity 160 is positively correlated with the amount of gas in the upper inflation cavity 160, and the length of the lower inflation cavity 150 is positively correlated with the amount of gas in the lower inflation cavity 150. By controlling the amount of gas in the upper inflation cavity 160 and the lower inflation cavity 150, and the gas being air introduced into the air inlet pipe 230, the unclogging disc 400 and the sealing ring 800 can be conveniently and stably lifted and moved in the vertical direction without other mechanical lifting structures, so that the device structure is more compact, and since other mechanical lifting devices are not required, the unclogging disc 400 and the sealing ring 800 can be lifted and moved by only controlling the connection and disconnection between the upper inflation cavity 160, the lower inflation cavity 150 and the air inlet pipe 230, thereby reducing the cost of the device.

[0061] Further improvement is that the isolation cavity 130 is a liquid storage cavity, the filter shell 100 is further provided with a liquid injection port and a liquid outlet port in communication with the isolation cavity 130, and the ash discharge valve 311 is a liquid outlet valve connected with the liquid outlet port. After adopting the above structure, liquid is injected into the isolation cavity 130 through the liquid injection port, so that when the dust catching inner sleeve 901 and the dust catching outer sleeve 902 are stretched upward, the liquid on the surface enhances the adhesion, so that the dust particles after contacting the dust catching inner sleeve 901 and the dust catching outer sleeve 902 are more easily attached to the dust catching inner sleeve 901 and the dust catching outer sleeve 902, thereby increasing the dust catching capacity. After the sealing ring 800 is lowered to the sealing position, liquid is filled into the isolation cavity 130 through the liquid injection port, so that the dust particles adhered to the dust catching inner sleeve 901 and the dust catching outer sleeve 902 are washed away, thereby cleaning the dust catching inner sleeve 901 and the dust catching outer sleeve 902, and opening the ash discharge valve 311, i.e. the liquid outlet valve, so that the collected dust particles are washed to the outside with the flow of liquid. The liquid stored in the liquid storage cavity can be water to reduce cost, or oil, which has weaker volatility than water, and the oil adhered to the surface of the dust catching inner sleeve 901 and the dust catching outer sleeve 902 when the sealing ring 800 is stretched upward ensures a certain dryness in the air inlet cavity 110, and the oil also increases the dust catching capacity of the dust catching sleeve 900, making it easier to attach dust particles. Of course, oil can also be injected into the liquid storage cavity when the dust catching sleeve 900 is stretched upward to ensure the dust catching capacity of the dust catching sleeve 900, and clean water is filled into the liquid storage cavity when the sealing ring 800 is lowered to the sealing position to wash and clean the dust catching inner sleeve 901 and the dust catching outer sleeve 902 adhering oil and dust particles, and the oil and dust particles are discharged.

[0062] Further improvements are that the filter barrel 300, the dredging assembly and the dust catching assembly are each provided with at least two and one-to-one correspondence, the output end of the first air pump 500 is connected with at least two and one-to-one corresponding air injection pipes 320 of the filter barrel 300, the air injection pipe 320 is provided with an air injection valve 321; the top end of the dredging disc 400 moving path is arranged adjacent to the top of the dredging disc 400, the dredging disc 400 is provided with a gas flow sensor 220; the air inlet pipe 230 is provided with an air inlet valve 231, the air inlet pipe 230 is communicated with the upper air charging channel at the side of the air inlet valve 231 away from the filter shell 100, and the air inlet pipe 230 is communicated with the lower air charging channel at the side of the air inlet valve 231 away from the filter shell 100.

[0063] In the application, the filter barrel 300, the dredging assembly and the dust catching assembly are each provided with two, of course, other quantities can also be provided, by increasing the number of filter barrels 300, the number of filter holes 301 and the filtering area are increased, and the filtering efficiency is improved.

[0064] In the normal use state, the two upper air charging valves 281, the two lower air charging valves 271, the two air injection valves 321 and the ash discharge valve 311 are closed, the air inlet valve 231 is opened, the dust-containing gas enters the air inlet cavity 110 through the air inlet pipe 230, is filtered through the two filter barrels 300, at this time, the two dredging discs 400 are located at the top of the filter barrel 300, the gas flow passing through the inside of the filter barrel 300 is detected through the gas flow sensor 220 below the dredging disc 400, when the data obtained by the gas flow sensor 220 is small, it indicates that the dust particles on the surface of the filter barrel 300 corresponding to the gas flow sensor 220 are more attached, and the blockage is more serious.

[0065] When the device is in use, the gas flow data can be pre-set. When the data obtained by one of the gas flow sensors 220 is less than the pre-set value of the device, the lower air charging valve 271 corresponding to the gas flow sensor 220 is opened, the air inlet valve 231 is closed, and the second air pump passes the gas into the lower air charging cavity 150 through the air inlet pipe 230, so that the sealing ring 800 rises to the dust catching position, and then the lower air charging valve 271 is closed to maintain the amount of gas in the lower air charging cavity 150, so that the dust catching inner sleeve 901 cooperates with the filter barrel 300 corresponding to the above-mentioned gas flow sensor 220, the air inlet valve 231 and the upper air charging valve 281 and the air jet valve 321 corresponding to the above-mentioned gas flow sensor 220 are opened, and the air in the air inlet pipe 230 is divided into two paths, one of which enters the upper air charging cavity 160, drives the air charging inner sleeve 180 and the air charging outer sleeve 190 to deform, so that the dredging disc 400 descends, and at the same time, the other enters the air inlet cavity 110, is filtered by the other filter barrel 300, so that clean gas enters the purification cavity 120, and the part of the clean gas enters the inner cavity of the air charging inner sleeve 180 corresponding to the above-mentioned gas flow sensor 220 through the air jet pipe 320 where the air jet valve 321 is in an open state, and then is sprayed out of the air jet flow channel through the air jet hole of the upper disc 401, and with the descent of the dredging disc 400, acts on each position of the inner wall of the filter barrel 300 in turn, blows off the dust particles attached to the outer wall of the filter barrel 300, and the blown-off dust particles contact the dust catching inner sleeve 901 with liquid on the surface, thereby adsorbing the dust particles. In addition, the dust-containing gas in the air inlet cavity 110 also contacts the dust catching outer sleeve 902, which traps the dust particles, thereby reducing the filtering burden of the other filter barrel 300 which is not severely blocked and preventing the filter barrel 300 from being blocked.

[0066] After the previously blocked filter barrel 300 is cleaned, the air inlet valve 231 is closed, the second air pump draws the air in the upper air charging cavity 160, so that the dredging disc 400 returns to the original position and drives the gas flow sensor 220 to move to the top of the filter barrel 300; then the lower air charging valve 271 is opened, the air in the lower air charging cavity 150 is drawn out, the sealing ring 800 descends to the sealing position, the dust catching inner sleeve 901 and the dust catching outer sleeve 902 are retracted into the isolation cavity 130, and after the air inlet valve 231 is opened, gas can be passed into the air inlet cavity 110 for filtering operation, and liquid can also be filled into the isolation cavity 130, the ash discharge valve 311 is opened, and the dust particles on the dust catching inner sleeve 901 and the dust catching outer sleeve 902 are carried away by the liquid.

[0067] Specifically, as shown in Figures 1-4 , Figure 6 and Figure 7As shown, the first air pump 500 is fixed above the top plate. Its input end is connected to the purification chamber 120, and its output end is connected to two air jet pipes 320. The cavity of the air jet pipe 320 is connected to the cavity of the inflation inner sleeve 180. An air jet valve 321 is provided on the air jet pipe 320 to control the connection between the first air pump 500 and the cavity of the inflation inner sleeve 180.

[0068] like Figures 3-10 As shown, both the injection port and the outlet are located on the shell 101. The injection port is located above the outlet. An injection pipe 290 and an outlet pipe 310 are fixed on the outside of the shell 101. The injection pipe 290 and the outlet pipe 310 are connected to the injection port and the outlet, respectively. A ash discharge valve 311 is installed on the discharge pipe 312. An inlet pipe 291 and a discharge pipe 312 are fixed on the inside of the shell 101. One end of the inlet pipe 291 is connected to the injection port, and the other end is fixed between the two dust collection cylinders 600 and connected to the isolation chamber 130 inside the two dust collection cylinders 600. One end of the discharge pipe 312 is connected to the outlet, and the other end is fixed between the two dust collection cylinders 600 and connected to the isolation chamber 130 inside the two dust collection cylinders 600. The liquid can enter the isolation chamber 130 through the injection pipe 290 and the inlet pipe 291 in sequence. After the ash discharge valve 311 is opened, the liquid can carry the dust particles captured by the dust collection sleeve 900 and be discharged through the drain pipe 312 and the outlet pipe 310 in sequence.

[0069] The above description is only a preferred embodiment of the present invention. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of the present invention, and these improvements and modifications should also be considered within the scope of protection of the present invention.

Claims

1. A self-cleaning air filter device, characterized by, The utility model relates to a filter, including: A filter shell (100) is provided with an air inlet and an air outlet on the side wall, and is provided with a dust outlet at the bottom, and the dust outlet is connected with a dust valve (251); A filter assembly includes a partition plate (200) fixed in the filter shell (100) and a filter barrel (300) arranged in the vertical direction on the partition plate (200), the partition plate (200), the inner wall of the filter shell (100) and the inner wall of the filter barrel (300) form a purification cavity (120) in communication with the air outlet, the partition plate (200), the inner wall of the filter shell (100) and the outer side wall of the filter barrel (300) form an air inlet cavity (110) in communication with the air inlet and the dust outlet; A dredging assembly includes a dredging disc (400) axially consistent with the filter barrel (300) and a first drive assembly driving the dredging disc (400) to move along the axial direction, the moving path of the dredging disc (400) includes a dredging section arranged in the filter barrel (300), and the dredging disc (400) is arranged in an annular array with a jet flow channel in communication with the purification cavity (120) through a first air pump (500) and extending to the circumferential outer edge of the dredging disc (400); A dust collection assembly includes a dust collection cylinder (600) fixedly arranged below the filter barrel (300) and extending in the vertical direction, a flat plate (700) having an annular gap between the circumferential inner wall of the dust collection cylinder (600), a sealing ring (800) arranged above the annular gap, a dust collection sleeve (900) fixed between the sealing ring (800) below and the dust collection cylinder (600) and being elastic, and the horizontal projection of the filter barrel (300) is arranged inside the horizontal projection of the sealing ring (800); A second drive assembly drives the sealing ring (800) to move between a sealing position and a dust collection position in the vertical direction, the sealing ring (800) in the sealing position forms an isolation cavity (130) with the flat plate (700) and the filter barrel (300) to accommodate the dust collection sleeve (900) and separate from the air inlet, the sealing ring (800) in the dust collection position stretches the dust collection sleeve (900) upwards to make the circumferential inner wall of the dust collection sleeve (900) gap-fit with the circumferential outer edge of the filter barrel (300), and the filter shell (100) is further provided with a dust outlet connected with a dust valve (311). The dust catching sleeve (900) is connected with the bottom frame (140) fixedly connected with the dust collecting cylinder at one end away from the sealing ring (800), the dust catching sleeve (900) comprises a dust catching inner sleeve (901) and a dust catching outer sleeve (902) sleeved outside the dust catching inner sleeve (901) and having a lower air charging cavity (150) between the dust catching inner sleeve (901), the second driving assembly comprises a lower air charging channel communicated between the air inlet and the lower air charging cavity (150), and the lower air charging channel is provided with a lower air charging valve (271); and the air inlet is used for connecting a second air pump.

2. The self-cleaning air filter device of claim 1, wherein: The outer guide rod (170) extending in the vertical direction is fixed in the air inlet cavity (110) and is in sliding fit with the sealing ring (800).

3. The self-cleaning air filter device of claim 1, wherein: The unblocking disc (400) is connected with the inner top wall of the filter shell (100) through the elastic air charging inner sleeve (180), the air jet flow channel is communicated with the output end of the first air pump (500) through the inner cavity of the air charging inner sleeve (180), the air charging inner sleeve (180) is sleeved with the elastic air charging outer sleeve (190) having two ends connected with the unblocking disc (400) and the inner top of the filter shell (100), the air charging inner sleeve (180) and the air charging outer sleeve (190) have an upper air charging cavity (160) therebetween, the first driving assembly comprises an upper air charging channel communicated between the air inlet and the upper air charging cavity (160), and the upper air charging channel is provided with an upper air charging valve (281).

4. The self-cleaning air filter device of claim 3, wherein: The filter barrel (300) is fixedly connected with the inner guide rod (210) extending in the vertical direction and in sliding fit with the unblocking disc (400).

5. The self-cleaning air filter device of claim 3, wherein: The upper air charging cavity (160) and the lower air charging cavity (150) are air charging cavities extending in the vertical direction, the length of the upper air charging cavity (160) is positively correlated with the amount of gas in the upper air charging cavity (160), and the length of the lower air charging cavity (150) is positively correlated with the amount of gas in the lower air charging cavity (150).

6. The self-cleaning air filter device of claim 3, wherein: The isolation cavity (130) is a liquid storage cavity, the filter shell (100) is further provided with a liquid injection port and a liquid outlet port communicated with the isolation cavity (130), and the ash discharge valve (311) is a liquid outlet valve connected with the liquid outlet port.

7. The self-cleaning air filter device of claim 3, wherein: The filter barrel (300), the unblocking assembly and the dust catching assembly are each provided with at least two and one-to-one correspondence, the output end of the first air pump (500) is connected with at least two jet pipes (320) corresponding to the filter barrel (300) one by one, and the jet pipe (320) is provided with a jet valve (321).

8. The self-cleaning air filter device of claim 6, wherein: The top end of the moving path of the unblocking disc (400) is arranged adjacent to the top of the unblocking disc (400), and the unblocking disc (400) is provided with a gas flow sensor (220).

9. The self-cleaning air filter device of claim 6, wherein: The air inlet is provided with an air inlet pipe (230), the air inlet pipe (230) is provided with an air inlet valve (231), the air inlet pipe (230) is communicated with the upper air filling channel on the side, away from the filter shell (100), of the air inlet valve (231), and the air inlet pipe (230) is communicated with the lower air filling channel on the side, away from the filter shell (100), of the air inlet valve (231).

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