An air filter and an air compressor

Abstract

This application provides an air filter and an air compressor. The air filter is applied to an air compressor, which includes at least one cylinder head. The air filter includes a first housing, a second housing, and a filter assembly. The first housing has a first closed end and a first wall extending from the first closed end. The second housing has a second closed end and a second wall extending from the second closed end. The first wall and the second wall are joined to form a filter chamber. The filter assembly is housed within the filter chamber. An intake pipe is provided through the first wall, with a first end outside the filter chamber and a second end inside the filter chamber. An outlet pipe is provided on the second wall. The outlet pipe is connected to both the second housing and the cylinder head. The air filter provided by this application can effectively filter impurities from the air drawn into the cylinder head, ensuring stable operation of the air compressor.

Description

Technical Field

[0001] This application relates to the field of air compressors, and more particularly to an air filter and an air compressor. Background Technology

[0002] An air compressor works by compressing air through the reciprocating motion of a piston within the cylinder head. This reciprocating motion completes four processes: expansion, intake, compression, and exhaust. During the downward movement of the piston, when the gas pressure in the sealed chamber falls below the intake pressure, the intake valve opens, and the piston pump enters the intake phase. Therefore, ensuring the intake air is free of impurities is crucial for the normal operation of the air compressor. Current technology typically incorporates an air filter at the air compressor's intake end to remove impurities from the intake air. Therefore, providing a stable and effective air filter is a pressing issue that needs to be addressed. Utility Model Content

[0003] This application aims to solve at least one of the above-mentioned problems by providing an air filter and an air compressor. The air filter provided by this application can effectively filter out impurities in the air drawn into the cylinder head, ensuring the stable operation of the air compressor.

[0004] In a first aspect, this application provides an air filter applied to an air compressor, the air compressor including at least one cylinder head; the air filter includes:

[0005] A first housing, a second housing, and a filter assembly; the first housing has a first closed end and a first wall extending from the first closed end; the second housing has a second closed end and a second wall extending from the second closed end; the first wall and the second wall are joined to form a filter cavity; the filter assembly is housed within the filter cavity; wherein,

[0006] An intake pipe is provided through the first wall, with the first end of the intake pipe located outside the filter chamber and the second end of the intake pipe located inside the filter chamber; an exhaust pipe is provided on the second wall; the exhaust pipe is connected to the second housing and the cylinder head respectively.

[0007] Specifically, the first housing also includes an annular wall; the first wall is disposed around the annular wall at the first closed end and is contained within the filter chamber; the annular wall and the first wall are provided with a gap, and the first wall is disposed at least partially around the second end of the air intake pipe, so that the air flowing out from the second end of the air intake pipe flows along the annular wall to the filter assembly.

[0008] Specifically, the intake pipe is installed through the annular wall so that the annular wall completely surrounds the second end of the intake pipe.

[0009] Specifically, the annular wall extends toward the second housing and beyond the second end of the intake pipe to block the direction of the airflow exiting from the second end.

[0010] Specifically, the surface of the ring wall is provided with raised ribs; the raised ribs are arranged to protrude relative to the ring wall.

[0011] Specifically, the first wall and the annular wall are arranged coaxially.

[0012] Specifically, the end face of the second end of the intake pipe is set as a bevel; the central axis of the intake pipe from the first end to the second end is not perpendicular to the bevel.

[0013] Specifically, the first wall forms a first opening; the second wall forms a second opening; the filter assembly is provided with a pressing part; the first opening and the second opening respectively abut against the two sides of the pressing part, thereby fixing the filter assembly inside the filter chamber.

[0014] Specifically, the first open mask is located on the outer periphery of the second open; the first wall is provided with a buckle, and the second wall is provided with a slot; the first wall is provided with a notch that penetrates the first open, and the buckle can pass through the notch to extend to the second open and engage with the slot, thereby allowing the first shell and the second shell to be detachably combined.

[0015] Specifically, the card slot is provided with a limiting baffle, which is set along the circumference of the second wall; when the buckle is engaged in the card slot, the limiting baffle is located on both sides of the buckle.

[0016] Specifically, the exhaust pipe is provided with at least one sealing groove, which is located on the outer periphery of the exhaust pipe; the air filter also includes at least one sealing ring; the sealing ring is accommodated in the sealing groove, and the exhaust pipe is sealed to the cylinder head of the air compressor through the sealing ring.

[0017] Specifically, the exhaust pipe is provided with two sealing grooves; the two sealing grooves are arranged side by side on the outer periphery of the exhaust pipe; the air filter also includes two sealing rings; the two sealing rings are respectively arranged in the sealing grooves; the exhaust pipe is sealed to the cylinder head of the air compressor through the two sealing rings.

[0018] Specifically, the second closed end has an inwardly recessed limit groove; the length direction of the limit groove is parallel to the length direction of the intake pipe; the air compressor is equipped with a limit post in conjunction with the limit groove; when the limit groove is engaged with the limit post, the first end of the intake pipe is set downward.

[0019] Specifically, the air compressor includes two cylinder heads; the second housing is provided with two exhaust pipes; the two exhaust pipes are in fluid communication with the two cylinder heads respectively; wherein the axes of the two exhaust pipes are not coplanar.

[0020] Specifically, the first housing is made of one-piece molded plastic; and the second housing is made of one-piece molded plastic.

[0021] Secondly, this application provides an air compressor that includes an air filter as provided in the first aspect of this application.

[0022] Additional aspects and advantages of this application will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of this application. Attached Figure Description

[0023] To more clearly illustrate the technical solution of this utility model, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0024] Figure 1 This application discloses a schematic diagram and a partial enlarged view of the air filter structure.

[0025] Figure 2 This is a cross-sectional view of the air filter disclosed in this application;

[0026] Figure 3 This is a cross-sectional view of the first shell disclosed in this application;

[0027] Figure 4 This is a schematic diagram of the structure of the first shell disclosed in this application;

[0028] Figure 5 This is another cross-sectional view of the first shell disclosed in this application;

[0029] Figure 6 This is a schematic diagram of the structure of the filtering component disclosed in this application;

[0030] Figure 7 This is another structural schematic diagram and a partial enlarged view of the first shell disclosed in this application;

[0031] Figure 8 This is a schematic diagram of the structure of the second shell disclosed in this application;

[0032] Figure 9 This is a cross-sectional view of the second shell disclosed in this application;

[0033] Figure 10 This is yet another structural schematic diagram of the first shell disclosed in this application;

[0034] Figure 11 This is a schematic diagram and a partial enlarged view of the relative installation relationship of the air filter with respect to the air compressor disclosed in this application;

[0035] Figure 12This application provides a cross-sectional view and an enlarged view of the air filter disclosed in this application, showing its relative installation state with respect to an air compressor.

[0036] Figure 13 This is a schematic diagram of the air compressor disclosed in this application. Detailed Implementation

[0037] The embodiments of this utility model are described in detail below. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain this utility model, and should not be construed as limiting this utility model. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without inventive effort are within the protection scope of this utility model.

[0038] In the description of this utility model, it should be understood that the terms "upper," "lower," "top," "bottom," "inner," "outer," "front end," "rear end," "both ends," "one end," and "the other end," etc., indicating the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on this utility model. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0039] In a first aspect, this application provides an air filter applied to an air compressor, the air compressor including at least one cylinder head 21; the air filter includes:

[0040] The first housing 11 has a first closed end 114, and a first wall 111 extends from the first closed end 114; the second housing 12 has a second closed end 124, and a second wall 121 extends from the second closed end 124; the first wall 111 and the second wall 121 are joined to form a filter chamber R1; the filter assembly 13 is accommodated within the filter chamber R1; wherein,

[0041] An intake pipe 112 is provided through the first wall 111. The first end 1121 of the intake pipe 112 is located outside the filter chamber R1, and the second end 1122 of the intake pipe 112 is located inside the filter chamber R1. An exhaust pipe 122 is provided on the second wall 121. The exhaust pipe 122 is connected to the second housing 12 and the cylinder head 21 respectively.

[0042] Specifically, refer to Figure 1 and Figure 2 Taking the orientation shown in the diagram as an example, the housing on the left side of the air filter is the first housing 11, and the housing on the right side of the air filter is the second housing 12. The first housing 11 is a cover closed on the left side, and extends to the right from the closed end on the left to form a ring-shaped first wall 111. Similarly, the second housing 12 is closed on the right side to form a cup-shaped structure, and extends to the left from the closed end on the right to form a ring-shaped second wall 121. The first wall 111 joins the second wall 121 to the right, and together they form a filter chamber R1 enclosed inside the first housing 11 and the second housing 12. The filter chamber R1 contains a filter assembly 13, which filters out fine particles such as dust and debris carried in the air, thereby providing clean airflow.

[0043] Furthermore, the intake pipe 112 extends through the first wall 111, with its first end 1121 protruding outward from the outer surface of the first wall 111, and its second end 1122 protruding inward from the inner surface of the first wall 111 and extending into the filter chamber R1. The exhaust pipe 122 is disposed on the second wall 121, allowing fluid communication between the inner side of the second wall 121 and the outside of the air filter. The exhaust pipe 122 of the air filter of this application is directly connected to the cylinder head 21 of the air compressor. The mixed air flowing into the filter chamber R1 through the intake pipe 112 is filtered by the filter assembly 13 and flows into the cylinder head 21 through the exhaust pipe 122 and the cylinder head, thereby assisting the air compressor in achieving air compression.

[0044] In some embodiments, the first housing 11 further includes an annular wall 113; the first wall 111 is disposed around the annular wall 113 at the first closed end 114 and is contained within the filter chamber R1; the annular wall 113 is provided with a gap from the first wall 111 and is disposed at least partially around the second end 1122 of the air intake pipe 112, so that the air flowing out from the second end 1122 of the air intake pipe 112 flows along the annular wall 113 to the filter assembly 13.

[0045] Specifically, refer to Figures 2 to 5An annular wall 113 is arranged around the inside of the first housing 11. The annular wall 113 is located on the inner surface of the first closed end 114 and extends a certain length toward the second housing 12, thereby at least partially surrounding the second end 1122 of the air intake pipe 112 to block the air intake direction of the air intake pipe 112. Furthermore, a gap is provided between the annular wall 113 and the first wall 111, so that the air blown out from the second end 1122 first blows toward the first wall 111 and is blocked by the first wall 111, thereby reducing the flow rate of the air entering the second end 1122. After the flow rate is reduced, the air continues to flow toward the first wall 111, effectively reducing the air flow rate entering the filter chamber R1, reducing the direct impact of the air on the first wall 111 of the first housing 11, and thus effectively reducing the noise emitted by the air filter during filtration.

[0046] In some embodiments, the intake pipe 112 is disposed through the annular wall 113 so that the annular wall 113 completely surrounds the second end 1122 of the intake pipe 112.

[0047] Specifically, refer to Figures 2 to 5 The annular wall 113 is joined circumferentially to the first wall 111 to form a cylindrical wall. Since the annular wall 113 is closer to the second end 1122 of the intake pipe 112 than the first wall 111, the air discharged from the second end 1122 can blow towards the annular wall 113, forming a clockwise airflow and a counterclockwise airflow along the inner surface of the annular wall 113. The airflows in opposite directions cancel each other out when flowing along the inner circumference of the annular wall 113, thereby reducing the airflow velocity flowing into the second end 1122, so as to effectively reduce the noise when the air filter is working.

[0048] In some embodiments, the annular wall 113 extends toward the second housing 12 and beyond the second end 1122 of the intake pipe 112 to block the direction of the airflow exiting the second end 1122.

[0049] Specifically, refer to Figure 2 and Figure 5 The axial length of the annular wall 113 is greater than the width of the intake pipe 112 along the axial direction of the annular wall 113. Air flowing from the second end 1122 of the intake pipe 112 blows directly onto the annular wall 113, rather than directly onto the first housing 11 of the air filter, and moves towards the first housing 11 and the second housing 12 under the obstruction of the annular wall 113. Simultaneously, the airflow velocity entering the filter chamber R1 is reduced by the action of the annular wall 113, thereby reducing the noise generated by the air blowing towards the first wall 111 and the second wall 121, and reducing the noise emitted by the air filter provided in this application when the air compressor is operating.

[0050] In some embodiments, the surface of the annular wall 113 is provided with a rib 1131; the rib 1131 protrudes relative to the annular wall 113.

[0051] Specifically, refer to Figure 2 and Figure 5 At least one rib 1131 is provided on the annular wall 113, so as to Figures 2 to 5 For example, the annular wall 113 has multiple ribs 1131. The ribs 1131 are evenly arranged circumferentially along the annular wall 113, and are parallel to the axial direction of the annular wall 113, protruding from the surface of the sidewall of the annular wall 113. The air flowing along the annular wall 113 has its flow velocity further reduced by the obstruction of the ribs 1131, further reducing the noise emitted by the air filter provided in this application when the air compressor is operating. It is understood that the ribs 1131 protrude inward relative to the inner surface of the annular wall 113, and simultaneously protrude towards the first wall 111 relative to the outer surface of the annular wall 113. This causes the airflow, whose velocity is reduced by the ribs 1131 inside the annular wall 113, to have its velocity reduced again by the structure of the ribs 1131 protruding towards the first wall 111 when it hits the first wall 111 and bounces back towards the outer side of the annular wall 113, further reducing the noise emitted by the air filter provided in this application when the air compressor is operating. It is understandable that the length of the rib 1131 is the same as the axial length of the ring wall 113, so as to reduce the airflow velocity towards the ring wall 113 and the rib 1131 as much as possible, thereby ensuring the noise reduction effect of the air filter.

[0052] In some embodiments, the first wall 111 and the annular wall 113 are coaxially arranged.

[0053] Specifically, refer to Figure 2 and Figure 5 Taking the accompanying drawings of this application as an example, both the first wall 111 and the annular wall 113 are configured as annular cylindrical surfaces. The first wall 111 and the annular wall 113 are nested from the outside in and share the same central axis. When the air blown out from the second end 1122 hits the annular wall 113, the resulting airflow further flows between the first wall 111 and the annular wall 113. The radial gap between the coaxially configured first wall 111 and the annular wall 113 is the same, thereby ensuring that the incoming air will not generate whistling noise due to flowing in uneven gaps, thus ensuring the noise reduction effect of the air filter.

[0054] In some embodiments, the end face of the second end 1122 of the intake pipe 112 is set as a bevel; the central axis of the intake pipe 112 from the first end 1121 to the second end 1122 is not perpendicular to the bevel.

[0055] Specifically, refer to Figure 4 , Figure 4The figure shows a chamfered section of the second end 1122, and a straight line L1 on the chamfered section. The central axis L2 of the intake pipe 112 along the first end 1121 to the second end 1122 is used to characterize the air inflow direction of the intake pipe 112. L1 and L2 are not perpendicular to each other, so that the cross-sectional area of ​​the chamfered section and the cross-sectional area of ​​the hollow channel of the intake pipe 112 are as large as possible, thereby increasing the airflow rate of the air flowing out of the second end 1122 of the intake pipe 112, effectively improving the air filtration efficiency of the air filter. It is understood that the central axis L2 does not limit the shape of the pipe wall of the intake pipe 112. The intake pipe 112 shown in the figure of this application is a C-shaped partial prism formed by fastening to the first closed end 114. In some other embodiments, it can also be a hollow cylinder or other structures.

[0056] In some embodiments, the first wall 111 forms a first opening 1111; the second wall 121 forms a second opening 1211; the filter assembly 13 is provided with a pressing part 131; the first opening 1111 and the second opening 1211 respectively abut against the two sides of the pressing part 131, thereby fixing the filter assembly 13 inside the filter chamber R1.

[0057] Specifically, refer to Figure 2 as well as Figures 6 to 10 Taking the air filter shown in the figures of this application as an example, the first wall 111 extends away from the first closed end 114 to form a first opening 1111, and the second wall 121 extends away from the second closed end 124 to form a second opening 1211. The first housing 11 and the second housing 12 are joined together through the first opening 1111 and the second opening 1211, thereby closing and forming a filter cavity R1 that accommodates the filter assembly 13. Further, a pressing part 131 is provided around the outer periphery of the filter assembly 13. When the first housing 11 and the second housing 12 are joined, the pressing part 131 is clamped between the first opening 1111 and the second opening 1211, thereby being fixed between the first housing 11 and the second housing 12. It is understood that the filter assembly 13 is clamped between the first opening 1111 and the second opening 1211 by the pressing part 131, thereby dividing the filter chamber R1 into two air chambers. The two air chambers achieve air exchange through the filter assembly 13. The two air chambers respectively accommodate the inlet pipe 112 and the outlet pipe 122, thereby ensuring that after the air flows in from the inlet pipe 112, it is filtered by the filter assembly 13 and flows into the air chamber containing the outlet pipe 122. Then, the filtered clean air flows out through the outlet pipe 122 to provide air compression function to the cylinder head 21 of the air compressor.

[0058] In some specific embodiments, the filter assembly 13 includes a pressing part 131, a frame 132, and a filter screen 133. The filter screen 133 is arranged in a multi-layered folded structure at the opening of the frame 132, and the pressing part 131 is arranged around the outer periphery of the opening of the frame 132. The main body of the frame 132 is cylindrical, and the outer diameter of the cylindrical main body is the same as the inner diameter of the second housing 12, so that the frame 132 can be inserted into the second housing 12 and fit against the second housing 12. Specifically, the filter screen 133 provided in this application is a HEPA filter element, and the outer periphery of the HEPA filter element abuts against the inner wall of the cylindrical main body, thereby dividing the filter chamber R1 into two chambers by the filter assembly 13.

[0059] In some embodiments, the first opening 1111 covers the outer periphery of the second opening 1211; the first wall 111 is provided with a buckle 1112, and the second wall 121 is provided with a slot 1212; the first wall 111 is provided with a notch 1113 penetrating the first opening 1111, and the buckle 1112 can pass through the notch 1113 to extend to the second opening 1211 and engage with the slot 1212, thereby detachably combining the first housing 11 and the second housing 12.

[0060] Specifically, refer to Figures 7 to 10 The radius of the first opening 1111 is larger than the radius of the second opening 1211, allowing the first opening 1111 to cover the outer edge of the second opening 1211 when joined. Furthermore, a notch 1113 is provided on the first opening 1111, extending through the first wall 111 along its axial direction. A buckle 1112 provided on the first wall 111 extends axially towards the notch 1113 of the first opening 1111 and beyond the first opening 1111 to the second wall 121. A corresponding groove 1212 is provided on the second wall 121, and the buckle 1112 engages with the groove 1212 after extending into the second wall 121, thereby detachably fixing the first housing 11 and the second housing 12. It is understood that the connection between the buckle 1112 and the first wall 111 can undergo elastic deformation, thus engaging with the groove 1212. At the same time, the buckle 1112 can be flipped away from the second wall 121 to separate from the slot 1212, thereby separating the first housing 11 from the second housing 12.

[0061] In some embodiments, the slot 1212 is provided with a limiting baffle 1213, which is arranged circumferentially along the second wall 121; when the buckle 1112 is engaged with the slot 1212, the limiting baffle 1213 is located on both sides of the buckle 1112.

[0062] Specifically, refer to Figure 1 and Figure 8The slot 1212 is arranged circumferentially along the second wall 121, and the limiting baffle 1213 is arranged circumferentially along the second wall 121 on the slot 1212. When the teeth of the buckle 1112 are engaged in the slot 1212, the limiting baffle 1213 is arranged on both sides of the buckle 1112 to fix the buckle 1112 and prevent the buckle 1112 from twisting circumferentially along the second wall 121. It can be understood that the limiting baffles 1213 are arranged in pairs, with a gap between the pairs of baffles, so that the buckle 1112 can be easily inserted into the gap. In some specific embodiments, when the buckle 1112 is engaged with the slot 1212, the position of the first housing 11 relative to the second housing 12 is fixed, so that when the air filter is installed on the air compressor and the air outlet pipe 122 is connected to the cylinder head 21 of the air compressor, the first end 1121 of the air inlet pipe 112 is set downward, so as to prevent dust in the air from falling into the air inlet pipe 112 of the air filter when the filter stops working and blocking the air passage of the air filter.

[0063] In some embodiments, the exhaust pipe 122 is provided with at least one sealing groove 1221, which is located on the outer periphery of the exhaust pipe 122; the air filter also includes at least one sealing ring 14; the sealing ring 14 is accommodated in the sealing groove 1221, and the exhaust pipe 122 is sealed to the cylinder head 21 of the air compressor through the sealing ring 14.

[0064] Specifically, refer to Figure 8 and Figure 9 At least one sealing groove 1221 is provided around the end of the exhaust pipe 122 where it connects to the cylinder head 21. The sealing groove 1221 extends into the cylinder head 21, and the sealing ring 14 surrounding the sealing groove 1221 elastically contacts the air inlet of the cylinder head 21, so that the end of the exhaust pipe 122 is sealed and connected to the cylinder head 21, ensuring that all the air filtered by the air filter can flow into the cylinder head 21. At the same time, the exhaust pipe 122 seals the air holes of the cylinder head 21 through the sealing ring 14 and the sealing groove 1221, keeping the cylinder head 21 sealed to achieve air compression.

[0065] In some embodiments, the exhaust pipe 122 is provided with two sealing grooves 1221; the two sealing grooves 1221 are arranged side by side on the outer periphery of the exhaust pipe 122; the air filter also includes two sealing rings 14; the two sealing rings 14 are respectively disposed in the sealing grooves 1221; the exhaust pipe 122 is sealed to the cylinder head 21 of the air compressor through the two sealing rings 14.

[0066] Specifically, refer to Figure 8 and Figure 9Two sealing grooves 1221 are provided, arranged sequentially along the length of the air outlet pipe 122. A sealing ring 14 is embedded in each sealing groove 1221. The two sealing rings 14 in the two sealing grooves 1221 of the air outlet pipe 122 abut against the cylinder wall of the cylinder head 21. After air enters the filter assembly 13 and is filtered by the filter assembly 13, it flows into the cylinder head 21 through the air outlet pipe 122. The interference fit between the two sealing rings 14 and the cylinder wall of the cylinder head 21 ensures a sealed connection between the air outlet pipe 122 and the cylinder head 21, thereby ensuring the stable operation of the air filter.

[0067] In some embodiments, the second closed end 124 is recessed inward with a limiting groove 123; the length direction of the limiting groove 123 is parallel to the length direction of the air intake pipe 112; the air compressor is equipped with a limiting post 22 in conjunction with the limiting groove 123; when the limiting groove 123 is engaged with 22, the first end 1121 of the air intake pipe 112 is set downward.

[0068] Specifically, refer to Figures 10 to 12 The second closed end 124 of the second housing 12 is recessed towards the sealing cavity to form a limiting groove 123, which is used to limit the relative positional relationship between the air filter and the air compressor. The air compressor is equipped with a limiting post 22, and the limiting groove 123 is installed on the air compressor along the length direction of the limiting post 22, so that the limiting post 22 is contained within the limiting groove 123. In the air filter provided in this application, the limiting groove 123 and the intake pipe 112 are arranged parallel to each other. Therefore, when the limiting groove 123 surrounds the outside of the limiting post 22 to be installed on the air compressor, the intake pipe 112 and the limiting post 22 are parallel to each other. In the embodiment given in this application, the length direction of the limiting post 22 is perpendicular to the working plane. When the air compressor is placed on the working plane, the intake pipe 112 is arranged perpendicular to the working plane and facing downwards, preventing dust in the air from falling into the air filter's intake pipe 112 and blocking the air passage of the air filter when the filter stops working.

[0069] In some embodiments, the air compressor includes two cylinder heads 21; a second housing 12 is provided with two exhaust pipes 122; the two exhaust pipes 122 are in fluid communication with the two cylinder heads 21 respectively; wherein the axes of the two exhaust pipes 122 are not coplanar.

[0070] Specifically, refer to Figure 9 , Figure 11 and Figure 12The air compressor is a four-cylinder compressor, and correspondingly, two cylinder heads 21 are provided at each end of the four-cylinder compressor. Since the two crankshafts connected to the motor output shaft are arranged sequentially along the output shaft, and the two crankshafts are not coplanar, the axes of the two cylinder heads 21 corresponding to the two crankshafts are also not coplanar. Therefore, the axes L3 and L4 of the two air outlet pipes 122 provided in this application are also not coplanar with the axes of the two cylinder heads 21, thereby ensuring that the two air outlet pipes 122 are located in the middle of the cylinder heads 21 they are connected to, and thus ensuring that the airflow from the air outlet pipes 122 is stable. Specifically, the axes L3 and L4 of the two air outlet pipes 122 are coaxially arranged around an axis L5, which is parallel to the length direction of the second housing 12, and the two air outlet pipes 122 are perpendicular to the axis L5, thereby ensuring that the air output of the two air outlet pipes 122 is the same, and that the working load of the cylinder heads 21 connected to the air outlet pipes 122 is the same.

[0071] In some embodiments, the first housing 11 is made of a single piece of plastic; and the second housing 12 is made of a single piece of plastic.

[0072] Specifically, both the first housing 11 and the second housing 12 are integrally molded from plastic. It is understood that the air compressor will continuously vibrate during operation. The air filter, fixedly connected to the air compressor via the first housing 11 and the second housing 12, will vibrate along with the air compressor. The connection point between the first housing 11 or the second housing 12 and the air compressor will experience relative compression during this vibration. Benefiting from the inherent material properties of plastic, elastic deformation can occur during relative compression to reduce wear, thereby preventing loosening of the connection between the first housing 11 and the second housing 12 and the air compressor. This avoids reducing the connection stability and airtightness of the air filter, ensuring stable operation of the air filter.

[0073] In some specific embodiments, the air compressor is provided with four cylinder heads 21, which are arranged in pairs around the air filter provided in this application and are respectively connected to, for example, Figure 11 The two cylinder heads 21 on the left and the two cylinder heads 21 on the right further improve air filtration efficiency.

[0074] In one implementation, refer to Figure 13The air filter is installed at one end of the air compressor and positioned between two adjacent cylinder heads 21. Since the air filter in this embodiment has two outlet pipes 122 on different sides, during assembly, it must first be inserted into the cylinder head of one outlet pipe 122, then the cylinder head 21 is inserted into the outlet pipe 122 of the other side, and finally screwed onto the air compressor. With the air filter provided in this application, the air compressor can be stably connected to the air filter via the cylinder head 21, ensuring stable assembly of the air filter and air compressor and reducing operating noise.

[0075] Secondly, this application provides an air compressor, which includes an air filter as provided in the first aspect of this application. The air compressor includes a crankcase, a cylinder, a connecting rod assembly, and a motor. The motor includes a shaft, one end of the connecting rod assembly is rotatably connected to the shaft, and the other end of the connecting rod assembly is provided with a piston housed within the cylinder. The connecting rod assembly can move with the rotation of the shaft, and the piston can reciprocate along the cylinder under the drive of the connecting rod assembly; wherein...

[0076] The crankcase protrudes to form a cylinder housing, the outer wall of which forms a groove, and...

[0077] The handle has a protruding slider that can slide into a groove and is fixed relative to the cylinder housing.

[0078] Specifically, the air compressor includes a first cylinder and a second cylinder; the cylinder housing includes a first housing and a second housing; wherein...

[0079] A first cylinder and a second cylinder are disposed at a first end of a rotating shaft; a first housing portion and a second housing portion are disposed at a first end of the rotating shaft; the first housing portion is used to housing the first cylinder, and the second housing portion is used to housing the second cylinder; such that the outer walls of the first housing portion and the outer walls of the second housing portion form a first sliding groove; wherein, the first sliding groove constitutes at least a partial sliding groove. The air filter provided in this application is disposed above the first sliding groove, thereby connecting to the cylinder heads 21 on both sides.

[0080] It should be noted that, without conflict, all of the above technical features can be freely combined, and such free combination, simple variations, changes and modifications are all within the protection scope of this patent.

[0081] All the technical features of the above components can be freely combined without conflict, and such free combination or simple variations, changes and modifications are all within the protection scope of this patent.

[0082] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "yet another embodiment," "another embodiment," "other embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Furthermore, those skilled in the art can combine and integrate the different embodiments or examples described in this specification.

[0083] Although embodiments of this application have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting this application. Those skilled in the art can make changes, modifications and variations to the above embodiments within the scope of this application.

Claims

1. An air filter, characterized in that, The air filter is applied to an air compressor, the air compressor including at least one cylinder head; the air filter includes: A first housing, a second housing, and a filter assembly; the first housing has a first closed end and a first wall extending from the first closed end; the second housing has a second closed end and a second wall extending from the second closed end; the first wall and the second wall are joined to form a filter cavity; the filter assembly is housed within the filter cavity; wherein, An intake pipe is provided through the first wall, with the first end of the intake pipe located outside the filter chamber and the second end of the intake pipe located inside the filter chamber; an exhaust pipe is provided on the second wall; the two ends of the exhaust pipe are respectively connected to the second housing and the cylinder head.

2. The air filter according to claim 1, characterized in that, The first housing further includes an annular wall; the first wall surrounds the annular wall; the annular wall is disposed at the first closed end and is contained within the filter chamber; the annular wall and the first wall are provided with a gap, and the annular wall is provided at least partially surrounding the second end of the air intake pipe, so that the air flowing out from the second end of the air intake pipe flows along the annular wall to the filter assembly.

3. The air filter according to claim 2, characterized in that, The intake pipe is disposed through the annular wall so that the annular wall completely surrounds the second end of the intake pipe.

4. The air filter according to claim 3, characterized in that, The annular wall extends toward the second housing and beyond the second end of the air inlet pipe to block the airflow in the direction of the airflow exiting the second end.

5. The air filter according to claim 4, characterized in that, The surface of the ring wall is provided with raised ribs; the raised ribs protrude relative to the ring wall.

6. The air filter according to any one of claims 2 to 5, characterized in that, The first wall and the annular wall are coaxially arranged.

7. The air filter according to any one of claims 1 to 5, characterized in that, The end face of the second end of the air intake pipe is set as a beveled surface; the central axis of the air intake pipe from the first end to the second end is not perpendicular to the beveled surface.

8. The air filter according to claim 1, characterized in that, The first wall forms a first opening; the second wall forms a second opening; the filter assembly is provided with a pressing part; the first opening and the second opening respectively abut against both sides of the pressing part, thereby fixing the filter assembly inside the filter cavity.

9. The air filter according to claim 8, characterized in that, The first open-face mask is disposed on the outer periphery of the second open-face mask; the first wall is provided with a buckle, and the second wall is provided with a slot; the first wall is provided with a notch that penetrates the first open-face mask, and the buckle can pass through the notch to extend to the second open-face mask and engage with the slot, thereby allowing the first housing and the second housing to be detachably combined.

10. An air compressor, characterized in that, Includes the air filter as described in any one of claims 1 to 9.

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