Filter element, air filter and air purification device

Abstract

The utility model discloses a filter element which comprises a first filter element body, a seventh cavity is formed in the first filter element body, a third filter element body is arranged on one side of the seventh cavity, an air inlet space is formed in the other side of the seventh cavity, the air inlet space can be communicated with an air inlet pipeline of an engine, and a fourth cavity is formed in the third filter element body. The third filter element can filter gas flowing into the seventh cavity from the fourth cavity. The structure of the filter element is integrated, the sealing performance is good, meanwhile, the filter element is easy to disassemble and maintain, the filter element is suitable for existing air filters of various specifications, the universality is high, and the production cost is reduced.

Description

Technical Field

[0001] This utility model relates to the field of engine intake air filtration technology, and in particular to a filter element, as well as an air filter and air purification device containing the filter element. Background Technology

[0002] When an engine is running, it needs to draw in air. To reduce or prevent dust and impurities in the air from entering the engine with the airflow, an air filter is usually installed in the engine intake system to filter the intake air through a filter element. Although the filter element has a good filtering effect, frequent replacement is very costly and inconvenient.

[0003] Existing engine intake systems have added an air pre-filter before the traditional air filter to pre-filter the air entering the filter element. The air pre-filter can filter out a large amount of dust and impurities, keeping the air filter clean for a longer period of time, thereby making the engine run more powerfully. At the same time, it can also extend the service life of the filter element in the air filter, reduce the frequency of replacement, and reduce engine maintenance costs.

[0004] Currently, a large amount of dust and impurities filtered by the air pre-filter collect in a sealed dust collection basin. An automatic dust removal device can automatically discharge this dust in real time. However, when this device draws clean air from the air filter to remove dust, improper operation or device malfunction may cause the engine to draw in unpurified external air through the automatic dust removal system. The effects of dust on the engine include reduced heat dissipation, aging of components and wiring, and potential safety hazards. Dust and dirt cover engine components, reducing heat dissipation and affecting engine efficiency. Furthermore, dust accelerates the rusting of metal parts and increases the risk of electrical wiring combustion. In some cases, dust may become flammable under high temperatures, increasing safety hazards in powered machinery. Utility Model Content

[0005] The purpose of this invention is to provide a filter element that, by incorporating a third filter element, filters air drawn back into the engine from the outside, thereby maintaining engine efficiency and reducing engine failure rates. The specific technical solution is as follows:

[0006] A filter element includes a first filter element having a seventh chamber, a third filter element being disposed on one side of the seventh chamber and an air intake space being formed on the other side, the air intake space being connected to an engine air intake pipe, and a fourth chamber being formed within the third filter element, the third filter element being capable of filtering gas flowing into the seventh chamber from the fourth chamber.

[0007] Furthermore, it also includes a second filter element disposed in the air intake space, and a third chamber is formed inside the second filter element. The third chamber is disposed on the other side of the seventh chamber and corresponds to the fourth chamber.

[0008] Furthermore, the second filter element includes a fourth end cap and a fifth end cap disposed opposite to each other, and a second core disposed between the fourth end cap and the fifth end cap. The fifth end cap is disposed opposite to the fourth chamber and can prevent gas in the seventh chamber from entering the third chamber without passing through the second core.

[0009] Furthermore, the first filter element includes a first end cap, and the third filter element includes a third core and a third end cap, with one end of the third core connected to the first end cap and the other end connected to the third end cap.

[0010] Furthermore, a fifth opening is provided on the first end cap so that the gas in the fourth chamber can be discharged to the outside of the filter element through the fifth opening.

[0011] Furthermore, the first filter element also includes a second end cap and a first core, with the second end cap disposed relative to the first end cap and the first core disposed between the first end cap and the second end cap.

[0012] An air filter includes a housing, one end of which is connected to an engine and the other end of which is connected to an exhaust fan assembly. The housing contains the filter element described above.

[0013] Furthermore, the housing includes a first cover and a sealing shell. One side of the first cover is opposite to the fourth chamber, and the other side of the first cover forms a fifth chamber, in which a dust discharge fan assembly can be installed.

[0014] Furthermore, the first cover includes an upper cover and a lower cover, the lower cover including a flange, the flange being detachably connected to the upper cover and enclosing it to form a fifth chamber.

[0015] Furthermore, a fourth opening is provided on the lower cover of the first cover, which corresponds to the fifth opening on the first end cover, so that the ash discharge fan assembly can communicate with the fourth chamber of the third filter element.

[0016] Furthermore, it also includes a first sealing strip, the first filter element including a first end cap, the first sealing strip being disposed between the first end cap and the lower cover of the first cover body. And / or, it also includes a second sealing strip, the ash discharge fan assembly having a housing, the second sealing strip being disposed between the housing and the lower cover of the first cover body.

[0017] Furthermore, the first end cap includes a first groove, which is disposed facing the lower cover of the first cover body, and the first sealing strip can be accommodated in the first groove.

[0018] Furthermore, the lower cover includes a second groove, which is disposed toward the upper cover of the first cover body, and the second sealing strip can be accommodated in the second groove.

[0019] An air purification device includes the filter element described above, or includes the air filter described above.

[0020] The filter element of this utility model has the following advantages:

[0021] 1. By installing a third filter element inside the first filter element, it is possible to prevent unpurified external air from being drawn back into the engine through the fourth chamber of the third filter element, thereby maintaining engine efficiency and reducing engine failure rate.

[0022] 2. By installing a second filter element, dust from the first filter element is prevented from entering the engine's intake manifold. In the event of accidental damage to the first filter element or improper installation, the second filter element can provide a certain level of filtration protection.

[0023] 3. The filter element has an integrated structure, good sealing performance, and is easy to disassemble and maintain. It is compatible with various existing air filters, has strong versatility, and reduces production costs. Attached Figure Description

[0024] Figure 1 This is a perspective view of the air purification device of this utility model.

[0025] Figure 2 This is a cross-sectional view of the air purification device of this utility model.

[0026] Figure 3 This is an exploded view of the air filter of this utility model.

[0027] Figure 4 This is a cross-sectional view of the filter element of this utility model.

[0028] Figure 5 This is a cross-sectional view of the ash exhaust fan assembly in the air purification device of this utility model.

[0029] Figure 6 This is a schematic diagram of the suction generator in the air purification device of this utility model.

[0030] Figure 7 This is a perspective view of the suction generator in the air purification device of this utility model.

[0031] Figure 8 This is a cross-sectional view of the suction generator in the air purification device of this utility model. Detailed Implementation

[0032] The air purification device includes an air pre-filter and an air filter arranged from top to bottom. External air containing dust and impurities first undergoes the first stage of filtration through the air pre-filter. The dust and impurities enter the dust collection unit of the air pre-filter. The filtered air then enters the air filter for the second stage of filtration. The dust is blocked by the filter element inside the air filter, and the clean air enters the engine through the inside of the filter element.

[0033] The automatic ash removal device of this invention can be detachably connected to most air pre-filter devices to achieve automatic ash removal from the air pre-filter device, such as... Figure 1 and Figure 2 As shown, the air pre-filter includes a cyclone tube that separates dust and impurities from the air. The cyclone tube consists of an inner tube and an outer tube. The inner tube includes an air outlet and a connecting end, and the outer tube includes a dust outlet and a connecting end. The connecting end of the inner tube extends into the connecting end of the outer tube, forming an annular air inlet at the connection. A cyclone vane is provided at the air inlet. Air containing dust and impurities enters the cyclone tube through the air inlet and swirls under the action of the cyclone vane. The dust and impurities move spirally along the outer tube and are discharged through the dust outlet of the outer tube. The purified air moves spirally along the inner tube and is discharged through the air outlet of the inner tube. The air outlet of the inner tube of the cyclone tube can be connected to an air filter or engine through an air outlet pipe or other connectors to guide the purified air to the air filter or engine.

[0034] Specifically, an air pre-filter typically includes multiple cyclone tubes arranged side-by-side. The outlet ends of the inner tubes of these cyclone tubes collect the purified air before it is directed to the air filter or engine via outlet pipes or other connecting components. For example, a manifold chamber can be incorporated into the air pre-filter, connecting the outlet end of each inner tube to the manifold chamber. Simultaneously, one end of the outlet pipe is connected to the manifold chamber, and the other end is connected to the engine. Alternatively, the dust outlet ends of the outer tubes of the multiple cyclone tubes can also collect the separated dust and impurities. For instance, a dust collection unit can be incorporated into the air pre-filter, connecting the dust outlet end of each outer tube to the dust collection unit for centralized collection of the separated dust and impurities. This dust collection unit is connected to an automatic dust removal device for automatic dust removal.

[0035] The automatic dust removal device of this utility model includes a connecting unit, a suction generator, a dust removal fan assembly, and a dust removal control assembly. The suction generator is connected to the dust collection unit through the connecting unit, forming a first path for dust movement in the connecting unit and the suction generator. One end of the dust removal fan assembly draws in gas, and the other end of the dust removal fan assembly is connected to the connecting unit through the suction generator, thereby forming a second path for gas movement at both ends of the dust removal fan assembly and in the suction generator. The first path and the second path converge below the suction generator. After the gas moves along the second path, it is ejected from the bottom of the suction generator, creating a negative pressure in the surrounding area, thereby guiding the dust in the suction generator to be discharged downward along the first path.

[0036] The dust in the first path is eventually discharged to the outside of the automatic dust removal device along the first direction, and the gas in the second path is discharged to the outside of the automatic dust removal device along the second direction. The second direction is the same as the first direction to generate negative pressure in the area where the dust is located. The same direction includes both directions that are completely parallel or overlapping, and directions that have an offset angle. Preferably, it is a uniform direction without an offset angle to maximize the negative pressure in the area where the dust is located.

[0037] To better understand the purpose, structure, and function of this utility model, the following detailed description of the filter element, air filter, and air purification device of this utility model will be provided with reference to the accompanying drawings and using the specific structure of the filter element and air filter as examples.

[0038] like Figure 1 and Figure 2 As shown, the air purification device includes an air pre-filter 500 and an air filter 200 arranged from top to bottom. A separation unit for separating dust and impurities in the air is arranged above the air pre-filter 500, and a dust collection unit 20 is arranged below it. The dust separation unit is usually a cyclone tube 11. Outside air containing dust is separated from the dust in the cyclone tube 11. Clean air enters the clean air collection unit 30 upwards and flows downwards into the air filter 200 through the clean air channel set in the middle of the air pre-filter.

[0039] like Figure 3As shown, the air filter 200 has a cylindrical structure with its axis oriented left-right, including a sealing housing 210 and a filter element installed inside the sealing housing 210. The sealing housing 210 is sealed on both sides with covers, with the right cover having an air outlet pipe. The covers on both sides of the sealing housing 210 are detachably installed; preferably, the covers are connected to the sealing housing 210 using snap-fit ​​fasteners. The upper end of the sealing housing 210 is sealed to the lower end of the clean air passage 7. Air enters the sealing housing 210 after preliminary filtration by the air pre-filter, and then passes through the filter element under negative pressure to obtain clean air. The air after the second filtration enters the engine through the air outlet pipe.

[0040] The dust separated by the cyclone tube 11 falls downward into the dust collection unit 20. The bottom of the dust collection unit 20 has two dust discharge ports 21. The automatic dust discharge device is detachably connected to the dust discharge ports 21 through the connecting unit 40 and maintains a high degree of sealing. The dust in the dust collection unit 20 is automatically discharged downward by the control system.

[0041] like Figures 1 to 4 As shown, the air filter 200 is connected to the air pre-filter 500 through the clean air channel 7. The air filter 200 is a cylindrical structure with the left-right direction as its axis, including a housing and a first filter element 410, a second filter element 420, and a third filter element 400 disposed inside the housing. The housing includes an outer cylindrical sealing shell 210, a first cover 211, and a second cover 212. The top of the sealing shell 210 has an opening, which is sealed to the lower end of the clean air channel. In this embodiment, a clamp structure is used for sealing and fixing. The first cover 211 and the second cover 212... The first filter element 400 and the second filter element 420 are positioned opposite each other on the left and right sides of the sealing housing 210 to seal the entire interior of the air filter 200, preventing unpurified external air from entering the air filter. A seventh chamber is formed within the cylindrical first filter element 410. A third filter element 400 is located on one side of the seventh chamber, and an air intake space is formed on the other side. The air intake space can be connected to the engine intake pipe. The second filter element 420 is placed within the air intake space. That is, the third filter element 400 and the second filter element 420 are positioned opposite each other on both sides of the air filter 200, with the second filter element 420 located on the side closest to the second cover 212. Air enters the sealing housing 210 after passing through the first stage of filtration in the air pre-filter, then undergoes a second stage of filtration under negative pressure through the first filter element 410, and finally enters the engine through the exhaust pipe 201.

[0042] Specifically, the second cover 212 has a circular hole in the middle, which is opposite to the air intake pipe of the engine. The second cover 212 is then sealed to the sealing shell 210 by multiple bolts on its outer edge. The first cover 211 includes an upper cover 202 and a lower cover 203. The outer edge of the lower cover 203 is detachably connected to the outer edge of the air filter cylinder. In this embodiment, a combination of slots and clamps is used for fixing. At the same time, an annular flange 214 is formed outward from the middle of the lower cover 203. The flange 214 is detachably connected to the circular upper cover 202 to form a fifth chamber 213. In this embodiment, a combination of snap-fit ​​and bolts is used for fixing. The housing of the ash discharge fan assembly is placed inside the fifth chamber 213. Holes are opened on the side walls of the upper cover 202 and the lower cover 203 for the discharge pipe 103 of the ash discharge fan assembly to pass through the fifth chamber 213. The discharge pipe 103 is connected to the suction generator 300 located below the dust collection unit 20. In addition, a circular fourth opening is formed in the middle of the lower cover 203, through which the suction pipe 102 of the ash discharge fan assembly 100 passes, so that the fourth chamber 206 in the third filter element 400 is connected to the interior of the ash discharge fan assembly 100.

[0043] like Figure 4 As shown, the air filter 200 is internally provided with a first filter element 410, a second filter element 420, and a third filter element 400. The second filter element 420 and the third filter element 400 are housed inside the first filter element 410. The first filter element 410 is a hollow cylindrical structure, including an annular second end cap (not shown in the figure), a first end cap 215, and a first core formed by pleated filter paper. The second end cap adopts a snap-fit ​​structure to form an interference fit with the inner side of the second end cap 212, so that the first filter element 410 is detachably connected to the second end cap. The inner side of the first end cap 215 is provided with an annular first groove 216 and a second groove 217. The first groove is used to accommodate one end of the first core, and the diameter of the second groove is smaller than that of the first groove, which is used to accommodate one end of the third filter element.

[0044] The third filter element is a hollow cylindrical structure, including a circular third end cap 218 and a third core 209. The third end cap 218 is located on the side near the second filter element 420 and cooperates with the second slot 217 on the inner side of the first end cap 215 to form a clamping force on the third core 209, so that the third filter element can be detachably connected to the first filter element. At the same time, the third end cap 218, the third core 209, and the first end cap 215 enclose a fourth chamber 206. The first end cap 215 has a circular fifth opening in the middle, through which the suction pipe 102 of the ash discharge fan assembly 100 passes, so that the fourth chamber 206 inside the third filter element 400 is connected to the interior of the ash discharge fan assembly 100.

[0045] The second filter element 420 is a hollow cylindrical structure, located inside the first filter element near the engine exhaust pipe. The second filter element 420 includes an annular fourth end cap (not shown), a circular fifth end cap 219, and a second core. The fourth and fifth end caps 219 are positioned opposite each other on either side of the second core. The fourth end cap uses a snap-fit ​​structure to form an interference fit with the inner side of the second cover body 212, allowing the second filter element 420 to be detachably connected to the second cover body. The fifth end cap 219 is positioned opposite the third end cap 218 of the third filter element. The fourth end cap, the circular fifth end cap 219, and the second core body together form a third chamber. Understandably, due to the negative pressure generated by the engine's suction, the air filtered by the first filter element enters the engine through the third chamber 205.

[0046] It should be noted that the main purpose of the second filter element in the air filter is to prevent dust on the outside of the first filter element from entering the engine's intake manifold when the first filter element is removed from the air filter due to vibration during the removal process. The second filter element is located between the first filter element and the engine's intake manifold to prevent dust on the first filter element from entering the engine's intake manifold. In addition, the second filter element can provide a certain degree of filtration protection in case the first filter element is accidentally damaged or not installed correctly.

[0047] like Figures 1 to 3 As shown, in this embodiment, the dust collection unit 20 of the air pre-filter 500 has a dust discharge port at its bottom. The suction generator 300 is connected to the dust discharge port via a connecting unit 40. This connecting unit 40 is an annular adapter with different diameters at its upper and lower ends. It is screwed onto the dust discharge port and the suction generator respectively via threads to ensure a sealed connection. The fifth port 308 of the suction generator is connected to the discharge pipe 103 of the dust discharge fan assembly 100 via a connecting pipe 600, so that the dust discharge fan assembly can draw gas filtered by the first filter element from the fourth chamber. The gas enters the second chamber of the suction generator along the connecting pipe 600 and is then discharged to the outside.

[0048] It should be noted that the purpose of the third filter element is to prevent unfiltered external air from entering the ash removal fan assembly 100 through the third opening 307 of the suction generator when the engine is running and the ash removal fan assembly 100 stops working, and then directly enters the first filter element of the air filter 200. Therefore, it performs filtration before entering the first filter element of the air filter 200, preventing the engine's suction power from exceeding that of the ash removal fan assembly, which would cause unfiltered external air to be drawn back into the engine. Furthermore, the air entering the ash removal fan assembly 100 can also be filtered again by the third filter element 400, protecting the internal structure of the ash removal fan assembly, thereby increasing the airflow and improving the efficiency of automatic ash removal.

[0049] Furthermore, an annular first sealing strip 207 is provided on the outer edge of the fifth opening of the first end cover 215. The first sealing strip 207 is located between the first end cover 215 and the lower cover 203. After the outer edge of the lower cover 203 is fixed to the sealing shell 210 of the air filter by multiple clamps, the first sealing strip 207 located between the first end cover 215 and the lower cover 203 can be squeezed to improve the airtightness of the fourth chamber 206. This allows a negative pressure to be generated in the fourth chamber 206 after the ash discharge fan assembly is started, thereby drawing the gas filtered by the first filter element into the ash discharge fan assembly. Specifically, a first groove is provided on the side of the first end cover 215 facing the lower cover 203. The first groove can accommodate the first sealing strip 207, so that the first filter element and the third filter element can be installed into the housing of the air filter first, then the first sealing strip 207 can be installed, and finally the lower cover of the air filter can be installed, achieving a convenient installation effect.

[0050] Meanwhile, a second sealing strip 208 is provided on the outer edge of the fourth opening of the lower cover 203. The second sealing strip 208 is located between the lower cover 203 and the ash discharge fan assembly housing. When the upper cover 202 and the lower cover 203 are fixed by bolts, the second sealing strip 208 located between the lower cover 203 and the ash discharge fan assembly housing is squeezed, thereby improving the airtightness of the fourth chamber 206. In addition, after the second sealing strip 208 and the first sealing strip 207 seal the connection between the housing, the lower cover 203 and the first end cover 215, the ash discharge fan assembly generates negative pressure in the fourth chamber 206 when it is working, which can suck up the impurities in the fourth chamber 206 and achieve the effect of real-time cleaning and maintenance. Specifically, a second groove is provided on the side of the lower cover 203 facing the upper cover. The second groove can accommodate the second sealing strip 208. The second sealing strip can be embedded into the second groove first, and then the suction pipe 102 of the ash discharge fan assembly can be inserted into the fourth opening of the lower cover. Finally, the upper cover and the lower cover are connected to achieve the effect of convenient installation.

[0051] The dust collection unit 20 has a funnel-shaped structure with a dust discharge port 21 at the bottom. The automatic dust discharge device includes a connecting unit 40, a dust discharge fan assembly 100, a dust discharge control assembly (not shown in the figure), and a suction generator 300. The connecting unit 40 includes two annular sidewalls connected vertically. The two sidewalls have different diameters. The upper sidewall is threadedly engaged with the dust discharge port 21 at the bottom of the dust collection unit 20, and the lower sidewall is threadedly engaged with the first flange 309 at the top of the suction generator. The connecting unit 40 is equivalent to an adapter for connecting the dust discharge ports 21 and the first flange 309 of different diameters.

[0052] like Figures 1 to 5As shown, one end of the ash removal fan assembly 100 is connected to the fifth port 308 of the suction generator 300. The ash removal fan assembly 100 includes a housing 101, a suction pipe 102, a discharge pipe 103, and an input port 104. The ash removal control assembly is connected to the input port 104. A drive motor 105 and a fan blade are installed inside the housing 101. The fan blade (not shown in the figure) is located above the drive motor 105. The suction pipe 102 includes a first port 108 and a second port 107. The first port 108 is connected to the top of the housing 101, and the second port 107 is connected to the fourth chamber. The discharge pipe 103 includes a third port 109 and a fourth port 110. The third port 109 is connected to the right side of the housing 101 and is arranged opposite to the fan blade. The fourth port 110 is connected to the fifth port 308 of the suction generator 300 through a connecting pipe 600.

[0053] like Figure 1 , Figures 6 to 8 As shown, the suction generator 300 has an overall inverted conical structure, including a funnel-shaped outer wall 303 and an inner wall 304 correspondingly fitted inside the outer wall 303. The inner wall of the suction generator includes an upwardly arranged annular first flange 309. The first flange 309 is threadedly engaged with a dust discharge port 21 at the bottom of the dust collection unit 20 through an annular connecting unit. This connecting unit is an adapter. The inner wall also includes a second flange, a first side wall 311, and a second side wall 312. A second flange is vertically arranged below the first flange 309. Multiple first extensions are formed outward from the flange for detachable connection with the flange of the lower outer side wall by screws. The inner side of the second flange is connected to the inclined first side wall 311. The bottom of the first side wall 311 is connected to the inclined second side wall 312. The angle between the second side wall 312 and the longitudinal axis is smaller than the angle between the first side wall 311 and the longitudinal axis, so that dust quickly accumulates when passing through the upper part of the first chamber, and falls quickly and is discharged from the lower part of the first chamber by the weight of the dust and impurities, keeping the second opening 306 of the first chamber unobstructed and preventing it from being blocked.

[0054] The outer wall of the suction generator includes a third flange 313, a third side wall 314, a fourth side wall 315, and a fifth side wall 316 connected in sequence. The third flange 313 is arranged laterally and forms multiple second extensions outward. The second extensions correspond to the first extensions and are fixed with bolts to connect the inner side wall and the outer side wall, thus sealing the top of the second chamber. The third side wall 314 is arranged vertically downward and connects to the inclined fourth side wall 315. Thus, the third side wall 314, the fourth side wall 315, the first side wall 311, and the second side wall 312 enclose an annular inverted cone-shaped second chamber. The fourth side wall 315 gradually approaches the outer side of the second side wall 312, so that the cross-sectional area of ​​the second chamber decreases from top to bottom. The volume of the second chamber is gradually reduced, thereby compressing the gas and causing it to be discharged downwards rapidly. The fourth side wall 315 is connected to the inclined fifth side wall 316. The fifth side wall 316 extends downwards while maintaining the distance between the bottom of the fourth side wall 315 and the second side wall 312, thereby forming a third opening 307 between the fifth side wall 316 and the second side wall 312 for the gas in the second chamber to be discharged outwards. An annular inverted cone-shaped first channel is formed between the fifth side wall 316 and the second side wall 312 to guide the gas to converge downwards. Since the cross-section of the first channel is smaller than the cross-section of the second chamber, the gas passing through the first channel is pressurized and discharged, increasing the flow rate of the gas when it is discharged outwards along the second path.

[0055] It is understood that in this embodiment, the first channel is a cone-shaped channel with a downwardly inclined cross section, so that the discharged gas can quickly converge in the middle direction, thereby forming a greater gas flow rate to increase the negative pressure intensity. Furthermore, the first channel can also be an annular surface structure formed by the inclined fifth side wall and the second side wall, as long as it can achieve the effect of the discharged gas quickly converging in the middle direction.

[0056] like Figure 8 As shown, the bottom of the fifth sidewall 316 extends downward beyond the bottom of the second sidewall 312, and thus forms a sixth chamber 317 below the second opening by the fifth sidewall 316. The gas discharged through the first channel converges along the guidance of the fifth sidewall 316, thereby quickly forming a negative pressure area in the sixth chamber 317, which in turn creates a negative pressure on the first chamber above, guiding the dust inside it to be quickly discharged from the second opening 306, thus increasing the dust removal efficiency.

[0057] Furthermore, the inner and outer walls of the suction generator are integrally molded structures to improve the overall sealing and structural strength of the suction generator. At the same time, the inner and outer walls are detachable structures to facilitate the maintenance and cleaning of the suction generator.

[0058] It is understandable that the gas supplied to the fifth port 308 of the suction generator can also come from an external air pump, as long as it can continuously fill the second chamber with gas and continuously create a negative pressure area at the bottom of the suction generator.

[0059] The working principle of this embodiment is as follows: the relatively clean air separated by the air pre-filter enters the air filter 200 through the clean air channel. At the same time, the gas in the air filter is drawn into the second chamber 302 of the suction generator 300 by the dust discharge fan assembly 100, and discharged downward through the third opening 307 at the bottom of the second chamber 302. The dust separated by the air pre-filter enters the first chamber 301 of the suction generator 300 along the connecting unit, and continues to move downward along the funnel-shaped inner sidewall 304 of the suction generator 300 to the second opening 306. Thus, the first direction of dust discharge and the second direction of gas discharge are in the same direction. The first path for dust movement and the second path for gas movement converge at the bottom of the suction generator 300. The negative pressure formed at the second opening 306 when the gas is discharged downward creates a downward suction force on the dust in the first chamber 301, so that the dust in the suction generator 300 is quickly discharged outward, thereby achieving the effect of automatic dust discharge.

[0060] The air purification device is controlled as follows: during operation, the dust removal fan assembly 100 is started first, followed by the engine. The exhaust pipe 103 of the dust removal fan assembly 100 blows air outward, creating a negative pressure environment in the connecting unit 40 and the dust collection unit 20 through the suction generator. This prevents dusty air from being drawn back into the air filter 200 when the engine starts, thus improving filtration efficiency. At the end of operation, the engine is turned off first, followed by the dust removal fan assembly 100. This also prevents dusty air from being drawn back into the air filter 200. Correspondingly, the dust removal control assembly can be equipped with a delay function to automatically achieve the control method of turning off the engine first and then the dust removal fan assembly 100, improving the degree of automation.

[0061] The terms “above,” “below,” and “within” as used above include the number itself; the terms “exceeding” and “excluding” do not include the number itself.

[0062] The present invention has been further described above with reference to specific embodiments. However, it should be understood that the specific description herein should not be construed as limiting the substance and scope of the present invention. Various modifications made to the above embodiments by those skilled in the art after reading this specification are all within the scope of protection of the present invention. The various specific technical features described in the above embodiments can be combined in any suitable manner without contradiction. To avoid unnecessary repetition, the embodiments of the present invention will not further describe various possible combinations.

[0063] If the embodiments of this utility model involve directional indicators (such as up, down, left, right, front, back, etc.), the directional indicators are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicators will also change accordingly.

Claims

1. A filter cartridge, characterized by, The first filter element includes a seventh chamber formed therein, a third filter element is arranged at one side of the seventh chamber, and an air inlet space is formed at the other side of the seventh chamber and is in communication with an engine air inlet pipeline. The third filter element includes a fourth chamber formed therein, and the third filter element can filter the gas flowing from the fourth chamber into the seventh chamber.

2. The filter cartridge of claim 1 wherein, The second filter element is arranged in the air inlet space, includes a third chamber formed therein, and is arranged at the other side of the seventh chamber and opposite to the fourth chamber.

3. The filter cartridge of claim 2 wherein, The second filter element includes fourth and fifth end covers arranged opposite to each other, and a second core body arranged between the fourth and fifth end covers. The fifth end cover is arranged opposite to the fourth chamber, and the fifth end cover can prevent the gas in the seventh chamber from entering the third chamber without passing through the second core body.

4. The filter cartridge of claim 1 wherein, The first filter element includes a first end cover, and the third filter element includes a third core body and a third end cover. One end of the third core body is connected to the first end cover, and the other end of the third core body is connected to the third end cover.

5. The filter cartridge of claim 4 wherein, The first end cover is provided with a fifth opening, so that the gas in the fourth chamber can be discharged to the outside of the filter element through the fifth opening.

6. The filter cartridge of claim 4 or 5, wherein, The first filter element further includes a second end cover and a first core body. The second end cover is arranged opposite to the first end cover, and the first core body is arranged between the first and second end covers.

7. An air cleaner characterized by comprising: The air filter includes a casing. One end of the casing is in communication with an engine, and the other end of the casing is in communication with an ash removal fan assembly. The casing contains the filter element as claimed in any one of claims 1 to 6.

8. The air cleaner of claim 7, wherein The casing includes a first cover body and a sealing shell. One side of the first cover body is opposite to the fourth chamber, and the other side of the first cover body is formed with a fifth chamber. The ash removal fan assembly can be arranged in the fifth chamber.

9. The air cleaner of claim 8, wherein The first cover body includes an upper cover and a lower cover. The lower cover includes a flange, and the flange is detachably connected to the upper cover and encloses the fifth chamber.

10. The air cleaner of claim 9, wherein The lower cover of the first cover body is provided with a fourth opening. The fourth opening corresponds to the fifth opening of the first end cover, so that the ash removal fan assembly is in communication with the fourth chamber of the third filter element.

11. The air cleaner of claim 9, wherein The first filter element includes a first end cover, and a first sealing strip is arranged between the first end cover and the lower cover of the first cover body. The ash removal fan assembly has a shell, and a second sealing strip is arranged between the shell and the lower cover of the first cover body.

12. The air cleaner of claim 11, wherein, The first end cover includes a first groove arranged towards the lower cover of the first cover body, and the first sealing strip can be accommodated in the first groove.

13. The air cleaner of claim 11, wherein The lower cover includes a second groove arranged towards the upper cover of the first cover body, and the second sealing strip can be accommodated in the second groove.

14. An air purification device, characterized by The air filter includes the filter element as claimed in any one of claims 1 to 6, or the air filter includes the air filter as claimed in any one of claims 7 to 13.

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