Filtering device

Abstract

The filtering device comprises a rotational flow assembly and a dust collecting assembly, the rotational flow assembly comprises an upper supporting disc and a plurality of rotational flow pipes arranged on the upper supporting disc, the upper supporting disc is provided with at least one obliquely-arranged disc face and at least one dust returning area formed at the bottom of the disc face, and the dust returning areas are communicated with the rotational flow pipes. The disc surface is obliquely arranged towards the dust return area from top to bottom, so that impurities on the disc surface are guided to fall into the dust collection assembly through the cyclone pipe after being collected to the dust return area along the disc surface. Dust and particles are guided to be collected to the dust return area through the upper supporting disc and then downwards enter the dust collecting basin through the confluence assembly, and the dust collecting device has the advantages that the purification efficiency of the filtering device and the air inflow of an engine are improved.

Description

Technical Field

[0001] The utility model relates to the field of engine intake filtration, in particular to a filtering device. Background Art

[0002] Engines require air to operate. To reduce or prevent dust and impurities from entering the engine through the airflow, an air filter is typically installed in the engine's intake system. This filter element filters the incoming air. While effective, frequent replacement is costly and inconvenient.

[0003] Existing engine intake systems incorporate an air pre-cleaner before the traditional air filter to pre-filter the air entering the filter element. This pre-cleaner removes a significant amount of dust and impurities, keeping the air filter clean for extended periods, thus enhancing engine performance. It also extends the life of the air filter element, reducing replacement frequency and lowering engine maintenance costs.

[0004] At present, after the air filtered by the air pre-purification device enters the top confluence chamber, the air is not completely purified, and some dust particles are retained on the upper support plate. They can neither continue to enter the filter element of the air filter upward nor be discharged downward to the dust collection basin. Dust and impurities circulate repeatedly in the confluence chamber, reducing the purification efficiency of the air purification device and the air intake volume of the engine. Utility Model Content

[0005] The purpose of this utility model is to provide a filter device that guides dust and particles downward to the dust collection basin through an upper support plate, thereby improving the purification efficiency of the filter device and the air intake volume of the engine. The specific technical solution is as follows:

[0006] A filtering device, characterized in that it includes a cyclone component and a dust collecting component, the cyclone component includes an upper support plate and a plurality of cyclone tubes arranged on the upper support plate, the upper support plate has at least one inclined disk surface and at least one dust return area formed at the bottom of the disk surface, the dust return area is connected to the cyclone tube, and the disk surface is inclined from top to bottom toward the dust return area to guide impurities on the disk surface to gather along the disk surface to the dust return area and then fall into the dust collecting component through the cyclone tube.

[0007] Furthermore, the upper support plate includes two plate surfaces arranged side by side, the two plate surfaces are arranged to be inclined relative to each other, and the dust return area is located at the connection between the two plate surfaces.

[0008] Furthermore, at least one row of swirl tubes is provided below the dust return area. The swirl tubes include an upper tube and a lower tube. The air outlet on the upper tube is communicated with the dust return area.

[0009] Furthermore, the upper support plate includes a plate surface with a funnel-shaped structure, and the dust return area is located at the bottom of the plate surface.

[0010] Furthermore, at least one cyclone tube is provided below the dust return area. The cyclone tube includes an upper tube and a lower tube. The air outlet on the upper tube is communicated with the dust return area.

[0011] Furthermore, a funnel-shaped air outlet side wall is provided on the air outlet communicating with the dust return area to increase the area communicating between the air outlet and the dust return area.

[0012] Furthermore, a funnel-shaped air outlet side wall is provided on the air outlet connected to the dust return area, and the air outlet side walls are arranged tangentially so that the air outlet covers the dust return area.

[0013] Furthermore, the cyclone assembly also includes a lower support plate, the lower tube of the cyclone tube is connected to the lower support plate, the dust outlet on the lower tube is connected to the dust collecting assembly, and the upper tube and the lower tube are sleeved.

[0014] Furthermore, the height of the vortex tube is gradually reduced from the front and rear ends to the middle, and the lower support plate is tilted downward from the front and rear ends to the middle.

[0015] Furthermore, the dust collection assembly includes a fifth connecting plate disposed oppositely on the left and right sides, and a sixth connecting plate disposed oppositely on the front and back sides. A conical groove is provided on the top edge of the fifth connecting plate. The fifth connecting plate and the sixth connecting plate are arranged in a closed arrangement. The bottom edges of the fifth connecting plate and the sixth connecting plate extend downward to form an inverted trapezoidal conduit plate. The bottoms of the conduit plates are connected and closed to form an ash discharge port. Guide grooves are formed between the conduit plates, so that dust falling into the dust collection assembly is gathered in the guide grooves. The filtering device of the utility model has the following advantages:

[0016] 1. The upper support plate guides dust and particles downward to the ash collection basin, improving the purification efficiency of the filter device and the air intake of the engine.

[0017] 2. The dust and particles on the upper support plate fall down quickly to avoid accumulation in the dust return area.

[0018] 3. Extend the service life of the filter element in the air filter, reduce the replacement frequency, and reduce the maintenance cost of the engine. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a three-dimensional diagram of the first embodiment of the filter device of the present invention.

[0020] Figure 2 It is a side view of the first embodiment of the filter device of the present invention.

[0021] Figure 3 It is a cross-sectional view of the first embodiment of the filter device of the present invention.

[0022] Figure 4 It is a three-dimensional diagram of the upper support plate in the first embodiment of the filter device of the present invention.

[0023] Figure 5 It is a side view of the upper support plate in the first embodiment of the filter device of the present invention.

[0024] Figure 6 It is a three-dimensional diagram of the lower support plate in the first embodiment of the filter device of the present invention.

[0025] Figure 7 It is a three-dimensional diagram of the second embodiment of the filter device of the present invention. DETAILED DESCRIPTION

[0026] In order to better understand the purpose, structure and function of the present invention, the filter device of the present invention is described in detail below with reference to the accompanying drawings.

[0027] like Figures 1 to 7 As shown, the filtering device includes, from top to bottom, an air filter 300, an air pre-cleaner 400, and an automatic dust discharge device 500. The air pre-cleaner 400 includes a cyclone assembly 10 and a dust collection assembly 30. The air filter 300 is located above the cyclone assembly 10 and communicates with the air outlet 13 of the cyclone assembly 10. The dust collection assembly 30 is located below the cyclone assembly 10 and communicates with the dust outlet 14 of the cyclone assembly 10. The automatic dust discharge device 500 is located below the dust collection assembly 30 and communicates with the dust discharge port 31 of the dust collection assembly 30. The air outlet pipe 90 on the air filter 300 communicates with the engine's air intake.

[0028] As a result, air containing dust and impurities enters the cyclone assembly 10, undergoing a swirling motion. Impurity particles spiral downward, passing through the dust outlet 14 of the cyclone assembly 10 and falling into the dust collection assembly 30. The dust collection assembly 30 is a funnel-shaped structure with at least one dust discharge port 31 formed at the bottom. An automatic dust discharge device 500 is detachably connected to the dust discharge port and maintains a high degree of sealing. The control system automatically discharges dust from the dust collection assembly 30 downward. The purified air spirals upward, passing through the air outlet 13 of the cyclone assembly 10 and entering the air filter 300 for a second filtration. It then flows to the engine through the outlet pipe 90. The cyclone assembly 10 preferably includes multiple cyclone tubes 17 arranged side by side.

[0029] Furthermore, the automatic ash discharge device 500 of the present invention includes an ash discharge valve body assembly 100 and an ash discharge control assembly 200. The ash discharge valve body assembly 100 is installed at the ash discharge port 31 at the bottom of the dust collecting assembly 30. The ash discharge control assembly 200 is connected to the ash discharge valve body assembly 100 to control the opening and closing of the ash discharge valve body assembly 100, wherein a first path for dust movement and at least one second path for gas movement are formed in the ash discharge valve body assembly 100. The first path and the second path are connected at the confluence point below the ash discharge valve body assembly 100 and continue downward. When the ash discharge control assembly 200 introduces pressurized gas into the ash discharge valve body assembly 100, that is, when the ash discharge valve body assembly 100 is started, the gas moves along the second path and then sprays out from the bottom of the ash discharge valve body assembly 100, thereby guiding the dust in the ash discharge valve body assembly 100 to be discharged downward along the first path.

[0030] When the air pre-purifier 400 is working, the dust in the cyclone assembly 10 will continue to fall into the dust collecting assembly 30 and gather at the ash discharge port 31 at the bottom. It can be understood that the air pre-purifier 400 is connected to the engine. Since the engine will vibrate when it is working, the air pre-purifier 400 will vibrate. The dust accumulated at the ash discharge port will fall further downward due to the vibration. The bottom of the ash discharge valve body assembly 100 is provided with a self-sealing ash discharge nozzle. When the ash discharge control assembly 200 is in the closed state, the bottom of the ash discharge nozzle is closed and the dust is completely sealed in the ash discharge valve body assembly 100. When the ash discharge control assembly 200 is opened, gas is introduced into the ash discharge valve body assembly 100 along the second path, forming a downward airflow along the second path to open the bottom ash discharge nozzle and discharge the dust accumulated near the ash discharge nozzle downward. At the same time, the second path and the first path form a negative pressure environment in the area below the confluence point to suck down and discharge the dust accumulated at the ash discharge port at the bottom of the dust collecting assembly 30.

[0031] The ash discharge nozzle can be a normally closed elastic ash discharge nozzle made of rubber, or it can be a structure such as a cover plate connected to a spring that can automatically reset to achieve sealing. At this time, when the automatic ash discharge device 500 is started, the ash discharge nozzle can be blown open by the downward airflow formed by the movement of gas. When the automatic ash discharge device 500 is closed, the ash discharge nozzle can be closed by automatically resetting or restoring its shape.

[0032] In addition to the above preferred embodiment, the ash discharge nozzle can also adopt a conventional sealing structure, with the opening and closing of the ash discharge nozzle being instantly controlled by a control device. In this case, the ash discharge nozzle needs to be controlled to open when the automatic ash discharge device 500 is activated to achieve automatic ash discharge, and to be controlled to close when the automatic ash discharge device 500 stops working. Compared with the above preferred embodiment, this arrangement is more complex in terms of device structure and control method, but it is more conducive to ensuring the sealing of the ash discharge nozzle when closed.

[0033] Specifically, such as Figure 1 As shown, in the present invention, the straight line in the longitudinal vertical direction is defined as the first axis, and the ash discharge valve body assembly 100 is arranged in a ring with the first axis 101 as the rotation axis, and its external overall structure is a funnel shape that is wide at the top and narrow at the bottom, the surface close to the first axis is the inner side, and the surface away from the first axis is the outer side. A hollow channel is set from top to bottom in the ash discharge valve body assembly 100 along the first axis. When the ash discharge control assembly is closed, dust accumulates in the channel. The channel is the first path. A chamber for gas flow is set around the channel of the ash discharge valve body assembly 100, and the chamber is connected to the inside of the channel. When the ash discharge valve body assembly 100 is opened, the gas can be sprayed into the channel through the chamber, and then the gas continues to spray downward from the ash discharge nozzle after passing the confluence point. This is the second path for gas movement.

[0034] The first path includes a connection area, a dust collection area, and a dust discharge area, which are sequentially connected from top to bottom. The connection area is connected to the dust collection assembly 30 to allow dust within the dust collection assembly 30 to enter the first path. The dust collection area is located in the middle area of ​​the dust discharge valve body assembly 100. The dust collection area has an inclined surface, which gives the dust collection area an overall funnel-shaped structure that is wider at the top and narrower at the bottom. The wider top allows the dust collection area to accommodate more dust, while the narrower bottom cooperates with the wider top to form an inclined surface, allowing dust to slide down along the inclined surface, thereby increasing the total amount and speed of dust discharged per unit time and improving dust discharge efficiency.

[0035] The second path includes a gas gathering area, an air outlet 13, and a gas discharge area that are connected in sequence from top to bottom. The gas in the gas gathering area can flow to the gas discharge area through the air outlet 13 and increase the gas flow rate. The gas gathering area is arranged around the outside of the slope of the dust gathering area and is extended obliquely along the inclination direction of the slope, so that the gas gathering area as a whole has a funnel-shaped structure that is wide at the top and narrow at the bottom, thereby shortening the movement path of the gas in the gas gathering area, reducing the gas pressure loss, and helping to save gas flow.

[0036] The dust discharge area on the first path and the gas discharge area on the second path intersect with each other. The gas moves along the second path to the gas discharge area, which can form a negative pressure environment in the dust discharge area to promote the discharge of dust along the first path. The intersecting dust discharge area and gas discharge area are located below the dust accumulation area and the gas collection area, so that the negative pressure environment generated after the intersection is also below the dust accumulation area. By means of the dust's own gravity and the slope of the dust accumulation area, the dust is attracted downward from the dust accumulation area and discharged, thereby achieving the effect of increasing the dust discharge speed.

[0037] Among them, the bottom of the slope of the dust gathering area extends toward the transition area between the gas collection area and the gas discharge area, so that the bottom of the slope is set close to the gas discharge area, thereby shortening the distance between the dust gathering area and the gas discharge area, avoiding the gas pressure attenuation caused by the increase in the gas movement distance, and weakening the suction of the negative pressure environment on the dust in the dust gathering area, while saving the gas flow and increasing the dust discharge efficiency.

[0038] Furthermore, the lower end of the inclined surface of the dust collection area is connected to a vertical sidewall extending in the vertical direction. The vertical sidewall can form a tubular channel below the inclined surface. This vertical sidewall is closer to the confluence of the dust discharge area and the gas discharge area, which helps the dust contained therein to be discharged downward more quickly, and also avoids forming an obstruction to the dust above it, thereby improving the efficiency of the downward discharge of dust above the tubular channel after the dust discharge control component is opened. It can be understood that the "vertical" here includes both an absolutely vertical setting and a setting close to vertical, both of which can achieve the above-mentioned effects.

[0039] An ash discharge nozzle is provided below the dust discharge area and the gas discharge area. The ash discharge nozzle is normally closed to maintain a negative pressure environment in the dust collecting assembly 30 upstream of the first path. When the gas moves along the second path, the ash discharge nozzle opens to discharge the gas and forms a negative pressure environment in the dust discharge area, thereby promoting the discharge of dust in the first path from the ash discharge nozzle.

[0040] Furthermore, a guide structure is provided in the gas discharge area, and the guide structure is inclined toward the ash discharge outlet of the dust discharge area to guide the gas flowing out of the gas gathering area to move toward the location of the ash discharge outlet, and also form a large impact force around the mouth of the ash discharge nozzle, thereby increasing the opening range of the ash discharge nozzle and making it easier to maintain the open state, thereby improving the ash discharge efficiency.

[0041] The ash discharge valve body assembly 100 is set according to the areas and functions within the above-mentioned first path and second path. The ash discharge valve body assembly 100 includes a shell and a valve core. The shell includes a detachably connected valve body outer cover and an adapter. One end of the adapter is connected to the dust collecting assembly 30, and the other end is abutted against the upper end of the valve core, and the lower end of the valve core is abutted against the abutment on the valve body outer cover. Of course, one end of the valve body outer cover can also be connected to the dust collecting assembly 30, the upper end of the valve core is abutted against the abutment on the valve body outer cover, and the lower end of the valve core is abutted against the adapter. As long as the dust collecting assembly 30, the valve body outer cover and the valve core can be connected up and down and the caliber conversion is adapted, it can enhance the adaptability of the automatic ash discharge device 500, make it easy to disassemble and maintain, and ensure its sealing.

[0042] The housing is provided with an air inlet hole connected to the gas collection area, and the air outlet 13 of the gas collection area is connected to the dust discharge area on the first path, so that the gas discharge area and the dust discharge area intersect with each other. The air outlet 13 of the gas collection area includes an integrally formed air duct that penetrates the valve core, one end of the air duct is connected to the gas collection area, and the other end is connected to the dust discharge area and the gas discharge area. The configuration of the integrally formed air outlet 13 makes the air duct have a stable structure, which is not easy to deform under the impact of the high-pressure gas in the gas collection area, and can make the air duct have good sealing properties, which helps to maintain the gas pressure in the second path. Furthermore, under the unit gas capacity, the air outlet 13 enables the automatic dust discharge device 500 to have a longer jet time, which is equivalent to saving gas in the air pump and increasing the dust discharge efficiency.

[0043] The valve core is located in the outer cover of the valve body, and a hollow channel running through the upper and lower parts is formed in the middle of the valve core. The two ends of the valve core are respectively sealed and connected to the adapter and the abutment on the valve body cover to fix the valve core in the outer cover of the valve body. The first path passes through the hollow channel of the valve core, and the gas collection area on the second path is formed between the valve core and the shell. The shell and the valve core are a detachable split structure. The valve core and the shell are connected by two groups of sealing components. The gas collection area is formed between the two groups of sealing components. The above arrangement enhances the stability and sealing of the gas collection area on the one hand, and enables the valve core to be disassembled from the top or bottom on the other hand to maintain and clean the inside of the gas collection area.

[0044] In order to better understand the purpose, structure and function of the present invention, the filter device of the present invention will be described in further detail below with reference to the accompanying drawings, taking the specific structure of the filter device as an example.

[0045] In the first embodiment of the present invention, the filtering device includes, arranged in order from top to bottom, an air filter 300, an air pre-cleaner 400, and an automatic dust removal device 500. The air pre-cleaner 400 separates impurities and particles from the air through internal swirling motion and transfers them to the automatic dust removal device 500 below. The automatic dust removal device 500 automatically discharges dust through a control system. After the first filtration by the air pre-cleaner 400, the air enters the air filter 300 upward. The air filter 300 performs a secondary filtration and delivers the clean air to the engine.

[0046] like Figures 1 to 6As shown, the air pre-purification device 400 has a square structure as a whole, including a cyclone component 10 and a dust collecting component 30 arranged upper and lower. The end of the device close to the air filter 300 is defined as the top, the end close to the automatic dust discharge device 500 is defined as the bottom, the end close to the air outlet pipe of the air filter 300 is defined as the right, and the other end away from the air outlet pipe of the air filter 300 is positioned as the left. The surface shown in the figure is the front, and the other surface not shown is the back. The height of the cyclone component 10 gradually decreases from the front and rear ends to the middle direction, so that the air impurities near the top outlet 13 of the cyclone component 10 gather to the low point in the middle and then enter the dust collecting component 30 downward, thereby improving the filtering effect of the air pre-purification device 400 and also improving the service life of the air filter 300.

[0047] Specifically, a plurality of swirl tubes are arranged in a horizontal array inside the swirl assembly 10. The swirl tube 17 includes an upper tube 18 and a lower tube 19. The connecting end of the upper tube 18 extends into the connecting end of the lower tube 19 and is sleeved, thereby forming an air inlet with an annular gap at the sleeve. The air inlet is provided with swirl blades. An air outlet 13 is provided upward at the other end of the upper tube 18, and a dust outlet 14 is provided downward at the other end of the lower tube 19. The diameter of the upper tube 18 is smaller than the diameter of the lower tube 19 at the sleeve. After the external air to be purified enters the swirl tube, it is first spirally downward and then upward and is sucked into the air filter 300, and flows to the engine through the outlet pipe.

[0048] Furthermore, the swirl assembly 10 also includes an upper support plate 20 and a lower support plate 40. The upper tube 18 of the swirl tube is connected to the bottom of the upper support plate 20, and the air outlet 13 of the upper tube 18 is connected to the space above the upper support plate 20; the lower tube 19 of the swirl tube is connected to the top of the lower support plate 40, and the dust outlet 14 of the lower tube 19 is connected to the space below the lower support plate 40; the upper tube 18 can be separately connected to the upper support plate 20 or integrally formed, and the lower tube 19 can be separately connected to the lower support plate 40 or integrally formed.

[0049] The upper portion of the upper support plate 20 is sealed against the sealed housing of the air filter 300. Together, the upper support plate 20 and the sealed housing form a confluence chamber that collects clean air purified by the cyclone tube and delivers it to the air filter 300. The dust collection assembly 30 is sealed beneath the lower support plate 40. An upward-facing square first mounting groove 27 is defined at the edge of the upper support plate 20. Correspondingly, a downward-facing square second mounting groove is defined at the edge of the lower support plate 40. The lower edge of the sealed housing is nested within the first mounting groove 27, and the upper edge of the dust collection assembly 30 is nested within the second mounting groove, ensuring a stable connection between the filter assembly.

[0050] Preferably, Figure 4 and Figure 5As shown, the swirl tubes are arranged with a height that gradually decreases from the front and rear ends toward the center. That is, the swirl tubes in the front and rear rows have the highest first height, while the swirl tubes in the middle row have the lowest second height. Consequently, the upper support plate 20 and the lower support plate 40 adapt to the swirl tube heights, forming a groove structure with a height that gradually decreases from the front and rear ends toward the center. The lowest points of the upper support plate 20 form a long strip of dust return area 50. Correspondingly, the lower support plate 40 also forms a groove structure with a height that gradually decreases from the front and rear ends toward the center. The first mounting groove 27 and the second mounting groove on the left and right sides form an inverted cone structure.

[0051] The purpose of setting up the above structure is that when the air filtered for the first time by the swirl component 10 is sucked into the confluence chamber above, some unseparated impurities will be entrained. These impurities are not sucked into the filter element of the air filter 300 due to their large size or weight. When the engine stops, they fall to the top surface of the upper support plate 20 again. At this time, the upper support plate 20 structure with high ends and low middle can guide the above impurities to move to the dust return area 50, and then through the air outlet 13 near the dust return area 50, fall back to the dust outlet 14 and then be discharged to the dust collecting component 30, thereby avoiding the above impurities being repeatedly blown up in the confluence chamber when the engine is started again, thereby improving the filtering effect and the service life of the air filter 300.

[0052] It is understood that a square top cover may be connected to the upper support plate 20, with an open bottom. This can also form a confluence chamber after being sealed with the upper support plate 20. An air outlet duct is formed on the confluence chamber, which is connected to the engine or air filter 300. Dust and particles in the confluence chamber are confluent through the upper support plate 20 to the dust return area 50 and then fall into the dust collection assembly 30. In other words, the structure of the upper support plate 20 is also applicable to a filtering device with a top cover.

[0053] Preferably, a row of swirl tubes in the swirl assembly 10 is relatively arranged below the dust return area 50 of the upper support plate 20, and the dust return area 50 passes through the air outlet 13 of the upper tube 18 of the swirl tube, so that impurities gathered near the dust return area 50 can quickly fall into the air outlet 13 to avoid accumulation in the dust return area 50.

[0054] Further, such as Figure 5 As shown, a funnel-shaped air outlet side wall 25 that is wide at the top and narrow at the bottom is provided on the air outlet 13 connected to the dust return area 50 to increase the area of ​​communication between the air outlet 13 and the dust return area 50. The top outer edge of the air outlet side wall 25 forms a tangent positional relationship so that all impurities gathered in the dust return area 50 enter the cyclone tube, thereby improving the effect of the impurities falling back downward.

[0055] Furthermore, a longitudinal connecting column 26 is provided between the upper support plate 20 and the lower support plate 40 for stably connecting the upper support plate 20 and the lower support plate 40. The connecting column 26 is provided at the corners of the upper support plate 20 and the lower support plate 40 to avoid affecting the array arrangement of the vortex tubes. The connecting column 26 can be fixedly connected by clipping or bolts.

[0056] Furthermore, the first mounting groove 27 extends downward at the four right-angled sides of the cyclone component 10 to set prismatic side walls 28. The adjacent prismatic side walls 28 and the first mounting groove 27 above are enclosed to form a groove opening downward. A filter screen is clamped in the groove. The filter screens at the front and rear ends are square, and the filter screens at the left and right ends have an inverted conical groove on the top and a protruding inverted conical structure on the bottom. The bottom of the above-mentioned filter screen is clamped with the top of the second mounting groove, so that the filter screen is fixed on the four sides of the cyclone component 10 to perform preliminary filtering of large particles of dust and impurities.

[0057] Furthermore, a rain shield is provided on the inner side of the filter screen. The rain shield is provided in a downward-opening groove formed by the adjacent prism side walls 28 and the first mounting groove 27 above. The bottom of the rain shield is slightly lower than the height of the air inlet between the upper tube 18 and the lower tube 19 of the cyclone tube to stop rain and snow entering the air inlet, so that the interior of the filter device remains dry. The rain shield can be clipped or bolted to the prism side walls 28 and the first mounting groove 27, or can be integrally formed with the upper support plate 20.

[0058] Further, filter cotton can be installed above the upper support plate 20, and the air discharged from the cyclone outlet 13 enters the air filter 300 through the filter cotton. The filter cotton can be disassembled and can be removed for cleaning after using for a period of time, and the filter cotton can be used repeatedly.

[0059] The air filter 300 is a cylindrical structure arranged with the left and right directions as the axis, including a sealing shell and a filter element installed in the sealing shell. The two sides of the sealing shell are closed with end covers, wherein the right end cover has an air outlet pipe. The end covers on the left and right sides of the sealing shell are installed in a detachable manner. Preferably, the end covers are connected to the sealing shell using snaps. The lower end of the sealing shell is sealed with the upper end of the first mounting groove 27. The air enters the sealing shell after passing through the filter cotton on the upper support plate 20, and then obtains clean air through the filter element under the action of negative pressure. The air after the second filtration is discharged through the air outlet pipe.

[0060] Specifically, the sealing shell includes a cylindrical portion and a connecting plate located at the lower end of the cylindrical portion. The cylindrical portion and the connecting plate are formed as one piece. The connecting plate includes a conical first connecting plate and a second connecting plate arranged opposite to each other on the left and right, and a rectangular third connecting plate and a fourth connecting plate arranged opposite to each other in the front. The above-mentioned connecting plates are respectively connected to the structure of the first mounting groove 27 on the cyclone assembly 10, and are further fixed and connected by bolts to keep it stable and airtight. The interior of the cylindrical portion has a circular inner hole, the axis of the cylindrical portion is horizontally arranged, and the filter element is installed in the circular inner hole of the cylindrical portion.

[0061] The dust collecting component 30 is a funnel-shaped structure with an ash discharge port formed at the bottom. The dust collecting component 30 includes a connecting plate, a busbar and an ash discharge port connected in sequence from top to bottom. The connecting plate includes an inverted trapezoidal fifth connecting plate arranged opposite to each other on the left and right, and a rectangular sixth connecting plate arranged opposite to each other on the front and back, wherein a conical groove is provided on the top edge of the fifth connecting plate to adapt to the conical structures on the left and right sides of the second mounting groove, the fifth connecting plate and the sixth connecting plate are arranged in an enclosed manner, and the bottom edges of the fifth connecting plate and the sixth connecting plate extend downward to form an inverted trapezoidal busbar, and the bottoms of each busbar are connected and enclosed to form a ring-shaped ash discharge port, and a guide groove is formed between the busbars, so that the dust falling into the dust collecting component 30 gathers in the guide groove, thereby accelerating its movement to the downward ash discharge port.

[0062] Furthermore, the automatic ash discharge device 500 includes an ash discharge valve assembly 100 and an ash discharge control assembly. The ash discharge valve assembly 100 is located at the ash discharge port at the bottom of the dust collection assembly 30. The ash discharge control assembly is connected to the ash discharge valve assembly 100 to control the opening and closing of the ash discharge valve assembly 100. It is understood that the automatic ash discharge device 500 can also be replaced with a cover, which is threadedly connected to the ash discharge port to ensure the structure within the dust collection chamber is sealed.

[0063] The second embodiment of the present invention differs from the first embodiment mainly in the structure of the upper support plate and the swirl assembly connected thereto, which will be described in detail below.

[0064] like Figure 7As shown, the swirl assembly 10 in this embodiment is a cylindrical structure as a whole, with a conical concave cavity formed on the top and a conical convex portion formed on the bottom. Specifically, the swirl assembly 10 includes an upper support plate 20 and a lower support plate 40 in an inverted conical shape that is wide at the top and narrow at the bottom. A plurality of swirl tubes are longitudinally arranged between the upper support plate 20 and the lower support plate 40. The swirl tubes are in a circular array. The upper support plate 20 gradually decreases in height from the outside to the inside to form a conical concave structure. An upward first mounting groove 27 is formed on the outer edge of the upper support plate 20 for sealing connection with the sealing shell of the air filter 300. It can be fixed by clamping or bolts to enclose a confluence chamber. When the engine is stopped, impurities in the confluence chamber fall to the upper support plate 20 and gather along the side wall of the concave structure of the upper support plate 20 to the dust return area 50 located at the apex of the cone.

[0065] The swirl tube includes an upper tube 18 and a lower tube 19. The diameter of the upper tube 18 is smaller than that of the lower tube 19. The connecting end of the upper tube 18 is inserted into the connecting end of the lower tube 19 and is sleeved, thereby forming an air inlet with an annular gap at the sleeve. The air inlet is provided with swirl blades. The other end of the upper tube 18 is provided with an air outlet 13 upward, and the other end of the lower tube 19 is provided with a dust outlet 14 downward. After the external air to be purified enters the swirl tube, it spirals downward and then upward and is sucked into the confluence chamber. Among them, the upper tube 18 of the swirl tube is connected to the bottom of the upper support plate 20, and the air outlet 13 of the upper tube 18 is connected to the confluence chamber above the upper support plate 20; the lower tube 19 of the swirl tube is connected to the top of the lower support plate 40, and the dust outlet 14 of the lower tube 19 is connected to the dust collecting chamber below the lower support plate 40; the upper tube 18 can be connected to the upper support plate 20 separately or as an integral part, and the lower tube 19 can be connected to the lower support plate 40 separately or as an integral part.

[0066] Furthermore, an air outlet 13 is provided in the dust return area 50 of the upper support plate 20 to allow impurities collected in this area to quickly fall to the collection area below. Preferably, the diameter of the air outlet 13 in the dust return area 50 is larger than that of the air outlets 13 in other areas to allow more impurities to be discharged downward simultaneously, thereby improving the efficiency of impurity falling. Specifically, a funnel-shaped air outlet sidewall 25, which is wider at the top and narrower at the bottom, is provided at the top of the upper tube 18 corresponding to the dust return area 50 to increase the diameter of the air outlet 13.

[0067] In this embodiment, the sealing shell of the air filter 300 includes an upper shell and a lower shell. The upper shell is a cylindrical structure arranged axially left and right. The shell wall on the right side is connected to the exhaust pipe. The bottom of the lower shell is annular, and the bottom extends upward to form a side wall. The height of the side wall gradually increases along the left and right directions pointing to the front and back, thereby forming a U-shaped groove pointing from the left and right to the middle and upper directions respectively. The U-shaped groove is integrally formed with the bottom of the upper shell to enhance the overall airtightness of the sealing shell.

[0068] The lower support plate 40 of the swirl assembly 10 gradually decreases in height from the outside to the inside, forming an inverted conical protruding structure. The outer edge of the lower support plate 40 forms a downward second mounting groove for sealingly connecting with the inverted conical dust collecting assembly 30, which can be fixed by snapping or bolts to enclose the dust collecting chamber. The dust collecting chamber is connected to the confluence chamber through the upper swirl tube, thereby receiving the air impurities falling back from the air outlet 13.

[0069] It is understandable that those skilled in the art can set circular, elliptical, square or other shaped dust return areas 50 at other positions of the upper support plate 20 according to actual needs. As long as the height of the upper support plate 20 gradually decreases from the outer edge to the direction of the dust return area 50, it can achieve the effect of guiding the impurities falling onto the upper support plate 20 to gather in the dust return area 50, and avoid them from staying on the upper support plate 20.

[0070] In addition, technicians in this field can increase the area of ​​the air outlet 13 in the dust return area 50 according to actual needs, as long as a large amount of impurities gathered in the dust return area 50 can be discharged downward quickly at the same time to avoid their accumulation in the dust return area 50 and improve the filtering effect.

[0071] The terms “above”, “below” and “within” mentioned above include the number or entity itself; the terms “exceed” and “outside” do not include the number or entity itself.

[0072] The present invention is further described above with the help of specific embodiments, but it should be understood that the specific description here should not be understood as limiting the essence and scope of the present invention, and various modifications made to the above embodiments by ordinary technicians in this field after reading this specification are all within the scope of protection of the present invention. The various specific technical features described in the above specific embodiments can be combined in any suitable manner unless there is any contradiction. In order to avoid unnecessary repetition, the various possible combinations of the embodiments of the present invention will not be described separately. If the embodiments of the present invention involve directional indications (such as up, down, left, right, front, back...), then the directional indications are only used to explain the relative position relationship, movement, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indications will also change accordingly.

Claims

1. A filtering device, characterized in that: It includes a cyclone component and a dust collecting component. The cyclone component includes an upper support plate and multiple cyclone tubes arranged on the upper support plate. The upper support plate has at least one inclined disk surface and at least one dust return area formed at the bottom of the disk surface. The dust return area is connected to the cyclone tube. The disk surface is inclined from top to bottom toward the dust return area to guide impurities on the disk surface to gather along the disk surface to the dust return area and then fall into the dust collecting component through the cyclone tube.

2. The filtering device according to claim 1, wherein The upper support plate includes two plate surfaces arranged side by side. The two plate surfaces are arranged to be inclined relative to each other, and the dust return area is located at the connection between the two plate surfaces.

3. The filtering device according to claim 2, characterized in that At least one row of swirl tubes is arranged below the dust return area. The swirl tubes include an upper tube and a lower tube. The air outlet on the upper tube is communicated with the dust return area.

4. The filtering device according to claim 1, wherein The upper supporting plate comprises a plate surface with a funnel-shaped structure, and the dust return area is located at the bottom of the plate surface.

5. The filtering device according to claim 4, characterized in that At least one cyclone tube is arranged below the dust return area. The cyclone tube comprises an upper tube and a lower tube. The air outlet on the upper tube is communicated with the dust return area.

6. The filtering device according to claim 3 or 5, characterized in that A funnel-shaped air outlet side wall is provided on the air outlet communicating with the dust return area to increase the area communicating between the air outlet and the dust return area.

7. The filtering device according to claim 3, characterized in that A funnel-shaped air outlet side wall is provided on the air outlet connected to the dust return area, and the air outlet side walls are arranged tangentially so that the air outlet covers the dust return area.

8. The filtering device according to claim 7, wherein The swirl assembly also includes a lower support plate. The lower tube of the swirl tube is connected to the lower support plate. The dust outlet on the lower tube is connected to the dust collecting assembly. The upper tube and the lower tube are sleeved.

9. The filtering device according to claim 8, characterized in that The setting height of the swirl tube is gradually reduced from the front and rear ends to the middle direction, and the lower support plate is tilted downward from the front and rear ends to the middle direction.

10. The filtering device according to any one of claims 1 to 5, characterized in that The dust collecting assembly includes a fifth connecting plate arranged opposite to each other on the left and right, and a sixth connecting plate arranged opposite to each other front and back. A conical groove is provided on the top edge of the fifth connecting plate. The fifth connecting plate and the sixth connecting plate are arranged in an enclosed manner. The bottom edges of the fifth connecting plate and the sixth connecting plate extend downward to form an inverted trapezoidal busbar. The bottom of the busbar is connected and enclosed to form an ash discharge port. A guide groove is formed between the busbars, so that dust falling into the dust collecting assembly is gathered in the guide groove.

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