Air filter and car

Abstract

The present application belongs to the technical field of automobile air intake systems, and specifically relates to an air filter and automobile, wherein the air filter comprises an upper housing assembly, a lower housing assembly, and a filter element assembly, wherein the upper housing assembly comprises an exhaust pipe, and the lower housing assembly comprises a lower housing and an intake pipe, wherein the intake pipe is connected to the inner cavity of the lower housing, and the lower housing is connected to the exhaust pipe, and the filter element assembly comprises a tubular filter element, wherein the tubular filter element is arranged in the inner cavity of the lower housing, and the tube wall of the tubular filter element has a microporous structure, and the tubular filter element is connected to the exhaust pipe. In the present application, the filter element assembly comprises a tubular filter element, which reduces the radial distance between the tubular filter element and the lower housing compared to the existing plate-type paper filter element, and the overall structure of the air filter is more compact, occupies less cabin space, and reduces the difficulty of cabin layout.

Description

Technical Field

[0001] The present application belongs to the technical field of automobile air intake systems, and specifically relates to an air filter and an automobile. Background Art

[0002] The engine draws in large quantities of air during operation. If this air is not filtered, suspended dust can be drawn into the cylinder, accelerating wear on the piston assembly and cylinder. Larger particles can enter the space between the piston and cylinder, causing severe "cylinder scuffing," which is particularly severe in dry, sandy environments. An air filter, installed in front of the carburetor or intake manifold, removes dust and grit from the air, ensuring sufficient, clean air enters the cylinder.

[0003] Currently, automotive air filters consist of an upper housing, a lower housing, and a filter element. The upper and lower housings snap together to form a cavity that accommodates the filter element. The upper housing has an air inlet connected to the cavity, while the lower housing has an exhaust port connected to the cavity, which is connected to the engine throttle. The filter element is a plate-type paper filter element and requires a minimum of 35 mm spacing from either the upper or lower housing. This results in the air filter occupying a large amount of cabin space, making cabin layout more difficult. Summary of the Invention

[0004] The purpose of this application is to provide an air filter and a car, so as to reduce the cabin space occupied by the air filter and reduce the difficulty of cabin layout.

[0005] In order to achieve the above object, the present application provides an air filter, comprising:

[0006] an upper housing assembly including an exhaust pipe;

[0007] A lower housing assembly, comprising a lower housing and an air intake pipe, wherein the air intake pipe is in communication with an inner cavity of the lower housing, and the lower housing is in communication with the exhaust pipe;

[0008] The filter element assembly comprises a tubular filter element, wherein the tubular filter element is arranged in the inner cavity of the lower shell, the tube wall of the tubular filter element has a microporous structure, and the tubular filter element is connected to the exhaust pipe.

[0009] Optionally, the tubular filter element is a multi-layer polypropylene structure.

[0010] Optionally, there are multiple tubular filter elements and adjacent tubular filter elements are arranged at intervals.

[0011] Optionally, the filter element assembly further includes a filter element upper cover, and a plurality of the tubular filter elements are connected to one end of the exhaust pipe through the filter element upper cover. A connecting hole is provided on the filter element upper cover, and the tubular filter element and the exhaust pipe are connected through the connecting hole.

[0012] Optionally, the filter element assembly further includes a filter element base, and a plurality of the tubular filter elements are arranged between the filter element base and the filter element upper cover, and the filter element base is sealingly connected to one end of the tubular filter element away from the exhaust pipe.

[0013] Optionally, the filter element assembly further includes a seal, which is located on a side of the filter element upper cover away from the tubular filter element and surrounds the communicating hole.

[0014] Optionally, in the radial direction of the tubular filter element, the gap between the tubular filter element and the inner wall of the lower shell is less than 10 mm.

[0015] Optionally, the lower shell assembly further includes a sound-absorbing plate, which is a polyethylene terephthalate structural member having a microporous structure. A window is provided on the lower shell, and the sound-absorbing plate is arranged in the window.

[0016] Optionally, the upper shell assembly further includes an upper shell, a shell upper cover, and a muffler, the upper shell being connected to the lower shell, the shell upper cover being located on a side of the upper shell away from the lower shell, an intermediate air passage being formed between the upper shell and the shell upper cover, the communicating hole being in communication with the intermediate air passage, and the exhaust pipe being connected to an end of the intermediate air passage away from the communicating hole;

[0017] The silencer includes a partition, and a first silencer chamber and a second silencer chamber on both sides of the partition, the first silencer chamber is located on one side of the intermediate air duct, and the second silencer chamber is located on one side of the exhaust pipe, and the first silencer chamber, the second silencer chamber, the intermediate air duct and the exhaust pipe are connected at the partition.

[0018] The present application also provides a car, comprising:

[0019] engine;

[0020] An air filter, wherein an exhaust pipe of the air filter is connected to a throttle valve of the engine.

[0021] The air filter and automobile disclosed in this application have the following beneficial effects:

[0022] In the present application, the upper housing assembly includes an exhaust pipe, which is used to connect to the throttle of the engine. The lower housing assembly includes a lower housing and an intake pipe. The intake pipe and the inner cavity of the lower housing are connected. The filter element assembly includes a tubular filter element, which is arranged in the inner cavity of the lower housing. The tube wall of the tubular filter element has a microporous structure for filtering air. The air enters the inner cavity of the lower housing through the intake pipe, is filtered by the tube wall of the tubular filter element, enters the inner cavity of the tubular filter element, and finally enters the throttle through the exhaust pipe. The filter element assembly in the present application includes a tubular filter element. Compared with the existing plate-type paper filter element, the tubular filter element reduces the radial distance between the tubular filter element and the lower housing. The overall structure of the air filter is more compact, occupies less cabin space, and reduces the difficulty of cabin layout.

[0023] Other features and advantages of the present application will become apparent from the following detailed description, or may be learned in part by practice of the present application.

[0024] It is to be understood that the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the disclosure. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] The accompanying drawings are incorporated into and constitute a part of the specification, illustrate embodiments consistent with the present application, and together with the specification, are used to explain the principles of the present application. Obviously, the drawings described below are only some embodiments of the present application, and those skilled in the art can derive other drawings based on these drawings without inventive effort.

[0026] Figure 1 It is a structural schematic diagram of the filter element assembly in an embodiment of the present application.

[0027] Figure 2 This is a front view of the air filter in the embodiment of the present application.

[0028] Figure 3 It is a bottom view of the air filter in the embodiment of the present application.

[0029] Description of reference numerals:

[0030] 100, lower housing assembly; 110, lower housing; 120, air intake pipe; 130, silencer;

[0031] 200, filter element assembly; 210, tubular filter element; 220, filter element cover; 230, filter element base; 240, seal;

[0032] 300, upper shell assembly; 301, intermediate air duct; 310, exhaust pipe; 320, upper shell; 330, shell upper cover; 340, muffler; 341, first muffler chamber; 342, second muffler chamber; 343, partition;

[0033] 400. Screws. DETAILED DESCRIPTION

[0034] Example embodiments will now be described more fully with reference to the accompanying drawings. However, example embodiments can be implemented in many forms and should not be construed as limited to the examples set forth herein; rather, these embodiments are provided so that this application will be thorough and complete and will fully convey the concepts of the example embodiments to those skilled in the art.

[0035] In addition, described feature, structure or characteristic can be combined in one or more embodiments in any suitable manner.In the following description, many specific details are provided so as to provide a full understanding of the embodiments of the present application. However, it will be appreciated by those skilled in the art that the technical scheme of the present application can be put into practice without one or more of the specific details, or other methods, components, devices, steps etc. can be adopted. In other cases, known methods, devices, implementations or operations are not shown or described in detail to avoid blurring the various aspects of the application.

[0036] The present application is further described below in conjunction with the accompanying drawings and specific embodiments. It should be noted that the technical features involved in the various embodiments of the present application described below can be combined with each other as long as they do not conflict with each other. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present application, and should not be understood as limiting the present application.

[0037] See also Figures 1 to 3 As shown, the air filter in this application includes an upper housing assembly 300, a lower housing assembly 100 and a filter element assembly 200. The upper housing assembly 300 includes an exhaust pipe 310, which is used to connect to the throttle of the engine. The lower housing assembly 100 includes a lower housing 110 and an intake pipe 120. The intake pipe 120 is connected to the inner cavity of the lower housing 110, and the lower housing 110 is connected to the exhaust pipe 310. The intake pipe 120 and the lower housing 110 can be connected as a whole, see Figure 2 As shown, the air intake pipe 120 is located in the lower right corner directly in front of the lower housing 110. The filter element assembly 200 includes a tubular filter element 210, which is disposed within the inner cavity of the lower housing 110. The wall of the tubular filter element 210 has a microporous structure for filtering air. The microporous structure comprises multiple micropores connecting the inside and outside of the tubular filter element 210. The inner cavity of the tubular filter element 210 is connected to the exhaust pipe 310. The tubular filter element 210 can be a circular tube.

[0038] In the air filter, the side where the upper housing assembly 300 is located is the clean side, and the side where the lower housing assembly 100 is located is the dirty side. Air enters the inner cavity of the lower housing 110 through the intake pipe 120, is filtered by the wall of the tubular filter element 210, enters the inner cavity of the tubular filter element 210, and finally enters the throttle valve through the exhaust pipe 310. The air filter can filter out dust and grit from the air, preventing suspended dust and grit from being drawn into the cylinder and causing premature wear of the piston assembly and cylinder, thereby extending the life of the engine.

[0039] It should be noted that the air intake pipe 120 and the lower housing 110 can be integrally connected, but are not limited to this. The air intake pipe 120 and the lower housing 110 can also be assembled and connected, depending on the specific situation. The tubular filter element 210 can be a round tube, but is not limited to this. The tubular filter element 210 can also be a square tube, etc., depending on the specific situation.

[0040] In the present application, the upper housing assembly 300 includes an exhaust pipe 310, which is used to connect to the throttle of the engine. The lower housing assembly 100 includes a lower housing 110 and an intake pipe 120. The intake pipe 120 and the inner cavity of the lower housing 110 are connected. The filter element assembly 200 includes a tubular filter element 210. The tubular filter element 210 is arranged in the inner cavity of the lower housing 110. The tube wall of the tubular filter element 210 has a microporous structure for filtering air. The air enters the inner cavity of the lower housing 110 through the intake pipe 120, and then is filtered through the tube wall of the tubular filter element 210, enters the inner cavity of the tubular filter element 210, and finally enters the throttle through the exhaust pipe 310. In the present application, the filter element assembly 200 includes a tubular filter element 210. Compared with the existing plate-type paper filter element, the tubular filter element 210 reduces the radial distance between the tubular filter element 210 and the lower shell 110. The overall structure of the air filter is more compact, occupies less cabin space, and reduces the difficulty of cabin layout.

[0041] See also Figure 2 As shown, in the radial direction of the tubular filter element 210 , the gap between the tubular filter element 210 and the inner wall of the lower housing 110 is less than 10 mm.

[0042] In existing plate-type paper filter elements, air is filtered through the upper and lower end surfaces of the plate-type paper filter element. To avoid affecting the air intake and exhaust, a gap of at least 35 mm is required between the upper and lower end surfaces of the plate-type paper filter element and the housing, which limits the size reduction of the air filter. Since the tubular filter element 210 is a hollow circular tube, its tube wall has a microporous structure for filtering air. Air passes through the tube wall and enters its inner cavity from the outside of the tubular filter element 210. Therefore, the distance between the tubular filter element 210 and the lower housing 110 can be reduced, and the tubular filter element 210 can even be brought into contact with the inner wall of the lower housing 110. The tubular filter element 210 and the inner wall of the lower housing 110 are tangent and in linear contact, which does not affect the air intake from the outside of the tubular filter element 210. In the present application, the gap between the tubular filter element 210 and the inner wall of the lower housing 110 is less than 10 mm, the overall structure of the air filter is more compact, and it occupies less cabin space, which reduces the difficulty of cabin layout, and is particularly suitable for vehicles using hybrid technology.

[0043] For example, the tubular filter element 210 is a multi-layer polypropylene (PP) structure. The tubular filter element 210 can be formed using meltblown polypropylene, which can be meltblown in multiple layers to create a porous medium. The tubular filter element 210 can be standardized, for example, with a commonly used diameter of 55 mm and a wall thickness of 4 mm.

[0044] It should be noted that the tubular filter element 210 may be a multi-layer polypropylene structure, but is not limited thereto. The tubular filter element 210 may also be made of other porous media, depending on the specific situation.

[0045] Existing plate-type paper filter elements require logging to manufacture filter paper, which is not conducive to environmental protection. The tubular filter element 210 in this application is made of multi-layer polypropylene, which is beneficial to environmental protection. The tubular filter element 210 is a porous medium with good filtering effect. It can effectively prevent dust suspended in the air from being sucked into the cylinder, delaying the wear of the piston group and the cylinder, and increasing the life of the engine. At the same time, the tubular filter element 210 has a small flow resistance. According to simulation analysis, the flow resistance of the tubular filter element 210 is at least 5% lower than that of the existing plate-type paper filter element, which can effectively improve engine efficiency and save energy. In addition, the tubular filter element 210 is a porous medium, which can also effectively reduce intake noise and improve driving comfort.

[0046] See also Figure 2 and Figure 3 As shown, there are multiple tubular filter elements 210 and adjacent tubular filter elements 210 are spaced apart. The tubular filter elements 210 located on the outside are spaced apart from each other. In the radial direction of the tubular filter element 210, the gap between the tubular filter element 210 and the inner wall of the lower shell 110 is less than 10 mm.

[0047] There are multiple tubular filter elements 210 and adjacent tubular filter elements 210 are arranged at intervals to prevent a single tubular filter element 210 from being blocked and affecting the operation of the air filter. At the same time, multiple tubular filter elements 210 are arranged to further reduce flow resistance, thereby effectively improving engine efficiency and saving energy.

[0048] See also Figures 1 to 3 As shown, the upper housing assembly 300 also includes an upper housing 320 and a housing cover 330. The upper housing 320 is connected to the lower housing 110, and the housing cover 330 is located on the side of the upper housing 320 away from the lower housing 110. An intermediate air passage 301 is formed between the upper housing 320 and the housing cover 330. The communication hole communicates with the intermediate air passage 301, and the exhaust pipe 310 is connected to the end of the intermediate air passage 301 away from the communication hole. The upper housing 320 and the lower housing 110 can be connected by screws 400, but this is not limited to this. The upper housing 320 and the lower housing 110 can also be connected by snap fasteners, depending on the specific situation.

[0049] The filter element assembly 200 also includes a filter element cover 220. The ends of the multiple tubular filter elements 210 closest to the exhaust pipe 310 are connected via the filter element cover 220. The filter element cover 220 includes a communication hole, which connects the tubular filter elements 210 and the exhaust pipe 310. In other words, the tubular filter elements 210 can be configured with an open end near the filter element cover 220 and a closed end away from the filter element cover 220. A slot can be provided at the end of the filter element cover 220 connected to the tubular filter element 210. One end of the tubular filter element 210 can be inserted into this slot, integrally connecting the filter element cover 220 and the tubular filter element 210.

[0050] The filter element assembly 200 also includes a filter element cover 220, to which the ends of the multiple tubular filter elements 210 near the exhaust pipe 310 are connected. This design allows the filter element cover 220 to be installed on the upper housing 320 or clamped between the upper housing 320 and the lower housing 110, facilitating installation. The tubular filter elements 210 can also be completely removed for replacement during maintenance. Furthermore, the multiple tubular filter elements 210 are all installed on the filter element cover 220, which allows them to be positioned using the filter element cover 220, ensuring appropriate spacing between adjacent tubular filter elements 210 and between the tubular filter elements 210 and the lower housing 110.

[0051] It should be noted that a slot can be set at one end of the filter element upper cover 220 connected to the tubular filter element 210, and one end of the tubular filter element 210 is inserted into the slot to connect the filter element upper cover 220 and the tubular filter element 210 as one. However, the present invention is not limited to this. The filter element upper cover 220 and the tubular filter element 210 can also be bonded and connected, depending on the specific situation.

[0052] When the filter element upper cover 220 and the tubular filter element 210 are snapped together, the tubular filter element 210 can be replaced separately, thereby reducing the maintenance cost of the car; when the filter element upper cover 220 and the tubular filter element 210 are bonded together, the filter element assembly 200 can be replaced as a whole, making car maintenance simpler.

[0053] See also Figures 1 to 3 As shown, the filter element assembly 200 further includes a filter element base 230. Multiple tubular filter elements 210 are disposed between the filter element base 230 and the filter element cover 220. The filter element base 230 is hermetically connected to the end of the tubular filter element 210 that is remote from the exhaust pipe 310. In other words, the tubular filter element 210 can be configured as a hollow circular tube with both ends open. The end of the tubular filter element 210 near the filter element base 230 is sealed by the filter element base 230. The end of the tubular filter element 210 near the filter element cover 220 is sequentially connected to the intermediate airway 301 and the exhaust pipe 310.

[0054] Multiple tubular filter cartridges 210 are clamped between the filter cartridge base 230 and the filter cartridge cover 220. The filter cartridge base 230 and the filter cartridge cover 220 allow the tubular filter cartridges 210 to be positioned, maintaining appropriate spacing between adjacent tubular filter cartridges 210 and between the tubular filter cartridges 210 and the lower housing 110. Furthermore, the tubular filter cartridges 210, the filter cartridge cover 220, and the filter cartridge base 230 are integrated together. The filter cartridge base 230 can abut against the bottom of the lower housing 110, and the filter cartridge cover 220 can abut against the upper housing 320, facilitating the installation and positioning of the filter cartridge assembly 200, as well as the overall installation or removal of the filter cartridge assembly 200.

[0055] It should be noted that a slot can be set at one end of the filter element base 230 connected to the tubular filter element 210, and one end of the tubular filter element 210 is inserted into the slot to connect the filter element base 230 and the tubular filter element 210 as one. However, the invention is not limited to this. The filter element base 230 and the tubular filter element 210 can also be bonded and connected, depending on the specific situation.

[0056] When the filter element base 230 and the tubular filter element 210 are snap-connected, the tubular filter element 210 can be replaced separately, thereby reducing the maintenance cost of the car; when the filter element base 230 and the tubular filter element 210 are adhesively connected, the filter element assembly 200 can be replaced as a whole, making car maintenance simpler.

[0057] See also Figure 1As shown, the filter element assembly 200 further includes a seal 240, which is located on the side of the filter element cover 220 away from the tubular filter element 210 and surrounds the communication hole. The filter element cover 220 may be provided with an annular groove that partially accommodates the seal 240. The seal 240 is partially disposed in the annular groove of the filter element cover 220 to prevent the seal 240 from shifting. The filter element cover 220 is provided with multiple communication holes corresponding to the tubular filter element 210. Multiple seals 240 may be provided in a one-to-one correspondence with the tubular filter element 210, i.e., a separate seal 240 is provided at each communication hole for sealing.

[0058] It should be noted that multiple seals 240 can be set in a one-to-one correspondence with the tubular filter element 210, and a seal 240 can be set separately at each connecting hole for sealing, but it is not limited to this. The seal 240 can also be set as a whole, and multiple connecting holes are all located in the seal 240, which can be determined according to the specific situation.

[0059] The filter element assembly 200 also includes a seal 240, which is located on the side of the filter element cover 220 away from the tubular filter element 210 and surrounds the communication hole. The provision of the seal 240 seals and improves the tightness of the connection between the filter element cover 220 and the upper shell 320, preventing unfiltered air from directly entering the intermediate airway 301. In addition, the tubular filter element 210, the filter element cover 220, and the filter element base 230 are integrated together. The filter element base 230 can abut against the bottom of the lower shell 110, and the filter element cover 220 can abut against the upper shell 320. While installing and positioning the filter element assembly 200, the seal 240 can also be compressed to ensure a reliable seal between the filter element cover 220 and the upper shell 320.

[0060] See also Figure 2 As shown, the lower housing assembly 100 also includes a sound-absorbing sheet 130. A window is defined in the lower housing 110, and the sound-absorbing sheet 130 is positioned within the window. The sound-absorbing sheet 130 can be fixedly connected to the lower housing 110, for example, by adhesive bonding or hot-melt bonding. The sound-absorbing sheet 130 is a polyethylene terephthalate (PET) structural member having a microporous structure for sound attenuation and noise reduction. The area, thickness, and porosity of the sound-absorbing sheet 130 can be adjusted to meet noise reduction requirements.

[0061] In the existing air filter, the lower housing 110 is made of PP-GF30, which is reinforced polypropylene with 30% glass fiber added.

[0062] In this application, lower housing 110 can be made of PP-GF30. A window is provided on lower housing 110, and sound-absorbing sheet 130 is positioned within the window. This reduces weight by approximately 30% compared to using PP-GF30 entirely for lower housing 110. Furthermore, sound-absorbing sheet 130 has a microporous structure for sound absorption and noise reduction, effectively reducing intake noise and housing radiation noise, thereby improving driving comfort.

[0063] See also Figure 2 and Figure 3 As shown, the upper shell assembly 300 also includes a muffler 340. In the upper shell assembly 300, the upper shell 320 is connected to the lower shell 110, and the shell cover 330 is located on the side of the upper shell 320 away from the lower shell 110. The upper shell 320 and the shell cover 330 can be fixedly connected, specifically by hot melting or adhesive bonding. An intermediate air passage 301 is formed between the upper shell 320 and the shell cover 330. The connecting hole is connected to the intermediate air passage 301, and the exhaust pipe 310 is connected to the end of the intermediate air passage 301 away from the connecting hole. The muffler 340 includes a partition 343, and a first muffler chamber 341 and a second muffler chamber 342 on either side of the partition 343. The first muffler chamber 341 is located on one side of the intermediate air passage 301, and the second muffler chamber 342 is located on the other side of the exhaust pipe 310. The first muffler chamber 341, the second muffler chamber 342, the intermediate air passage 301, and the exhaust pipe 310 are connected at the partition 343.

[0064] The upper shell 320 and the shell cover 330 are fixedly connected by hot melting or bonding, and an intermediate air channel 301 is formed between the upper shell 320 and the shell cover 330. The structural parts forming the intermediate air channel 301 are divided into the upper shell 320 and the shell cover 330, and then the upper shell 320 and the shell cover 330 are fixedly connected by hot melting or bonding. This design can reduce the difficulty of manufacturing the structural parts forming the intermediate air channel 301, thereby reducing production costs.

[0065] Muffler 340 is used to reduce exhaust noise and casing radiated noise, thereby improving driving comfort. Furthermore, by adjusting the position of baffle 343, the size of first and second muffler chambers 341 and 342 can be adjusted, thereby increasing the noise reduction of different exhaust noises.

[0066] The present application also provides a car, which includes an engine and an air filter, wherein an exhaust pipe 310 of the air filter is connected to a throttle valve of the engine.

[0067] It should be noted that, in addition to the engine and air filter, the car also includes necessary components such as chassis and wheels, which can be configured as needed by those skilled in the art and will not be elaborated here.

[0068] In the present application, the automobile includes an engine and an air filter. The air filter includes an upper housing assembly 300, a lower housing assembly 100 and a filter element assembly 200. The upper housing assembly 300 includes an exhaust pipe 310, which is connected to the throttle of the engine. The lower housing assembly 100 includes a lower housing 110 and an intake pipe 120. The intake pipe 120 is connected to the inner cavity of the lower housing 110. The filter element assembly 200 includes a tubular filter element 210, which is arranged in the inner cavity of the lower housing 110. The tube wall of the tubular filter element 210 has a microporous structure for filtering air. The air enters the inner cavity of the lower housing 110 through the intake pipe 120, and then is filtered through the tube wall of the tubular filter element 210, enters the inner cavity of the tubular filter element 210, and finally enters the throttle through the exhaust pipe 310. In the present application, the filter element assembly 200 includes a tubular filter element 210. Compared with the existing plate-type paper filter element, the tubular filter element 210 reduces the radial distance between the tubular filter element 210 and the lower shell 110. The overall structure of the air filter is more compact, occupies less cabin space, and reduces the difficulty of cabin layout.

[0069] The terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature identified with "first," "second," etc., may explicitly or implicitly include one or more of such features. Throughout the description of this application, "plurality" means two or more, unless otherwise specifically defined.

[0070] In this application, unless otherwise specified or limited, terms such as "assembly" and "connection" should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integration; mechanical connection, electrical connection; direct connection, or indirect connection through an intermediate medium; internal communication between two components, or interaction between two components. Those skilled in the art will understand the specific meanings of the above terms in this application based on specific circumstances.

[0071] In the description of this specification, the reference terms "some embodiments", "exemplarily", etc. mean that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art can combine and combine different embodiments or examples described in this specification and features of different embodiments or examples without contradiction.

[0072] Although the embodiments of the present application have been shown and described above, it can be understood that the above embodiments are exemplary and cannot be understood as limitations on the present application. Ordinary technicians in this field can change, modify, replace and modify the above embodiments within the scope of the present application. Therefore, any changes or modifications made in accordance with the claims and description of the present application should fall within the scope of the patent application.

Claims

1. An air filter, characterized in that: include: an upper housing assembly including an exhaust pipe; A lower housing assembly, comprising a lower housing and an air intake pipe, wherein the air intake pipe is in communication with an inner cavity of the lower housing, and the lower housing is in communication with the exhaust pipe; A filter element assembly, comprising a tubular filter element, the tubular filter element being disposed in the inner cavity of the lower housing, the tube wall of the tubular filter element having a microporous structure, and the tubular filter element being in communication with the exhaust pipe; Wherein, the upper housing assembly further comprises an upper housing, a housing upper cover and a muffler, the upper housing is connected to the lower housing, the housing upper cover is located on the side of the upper housing away from the lower housing, an intermediate air passage is formed between the upper housing and the housing upper cover, the intermediate air passage is connected to an end of the tubular filter element close to the upper housing assembly through a communicating hole, and the exhaust pipe is connected to an end of the intermediate air passage away from the communicating hole; The silencer includes a partition, and a first silencer chamber and a second silencer chamber on both sides of the partition, the first silencer chamber is located on one side of the intermediate air duct, and the second silencer chamber is located on one side of the exhaust pipe, and the first silencer chamber, the second silencer chamber, the intermediate air duct and the exhaust pipe are connected at the partition.

2. The air filter according to claim 1, characterized in that The tubular filter element is a multi-layer polypropylene structural component.

3. The air filter according to claim 1, characterized in that There are multiple tubular filter elements, and adjacent tubular filter elements are arranged at intervals.

4. The air filter according to claim 3, characterized in that The filter element assembly also includes a filter element upper cover, and multiple tubular filter elements are connected to one end of the exhaust pipe through the filter element upper cover. The filter element upper cover is provided with the connecting hole, and the tubular filter element and the exhaust pipe are connected through the connecting hole.

5. The air filter according to claim 4, characterized in that The filter element assembly further includes a filter element base, a plurality of the tubular filter elements are arranged between the filter element base and the filter element upper cover, and the filter element base is sealingly connected to one end of the tubular filter element away from the exhaust pipe.

6. The air filter according to claim 5, characterized in that The filter element assembly further includes a sealing member, which is located on a side of the filter element upper cover away from the tubular filter element and surrounds the communicating hole.

7. The air filter according to claim 3, characterized in that In the radial direction of the tubular filter element, a gap between the tubular filter element and the inner wall of the lower shell is less than 10 mm.

8. The air filter according to claim 1, characterized in that The lower shell assembly further includes a sound-absorbing plate, which is a polyethylene terephthalate structural member and has a microporous structure. A window is provided on the lower shell, and the sound-absorbing plate is disposed in the window.

9. An automobile, characterized in that: include: engine; The air cleaner according to any one of claims 1 to 8, wherein an exhaust pipe of the air cleaner is connected to a throttle valve of the engine.

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