A cleanroom fresh air energy-saving filtration device

Abstract

This application relates to an energy-saving filtration device for cleanroom fresh air, belonging to the field of cleanroom fresh air systems. It includes a housing comprising a main housing, a first side cover, and a second side cover. The first and second side covers are mounted on opposite sides of the main housing and are locked in place. A front cover is installed on the front end of the main housing to shield the first and second side covers, and the front cover is fixedly connected to the main housing. This energy-saving filtration device for cleanroom fresh air, through its rational structural design and multi-stage filtration system, effectively removes various pollutants from the air, improving air cleanliness. Furthermore, the device is easy to install and maintain, structurally stable, and highly durable. The inclusion of a negative ion generator and a concentrator further improves air quality, making the air fresher and healthier.

Description

Technical Field

[0001] This application relates to the technical field of cleanroom fresh air devices, and in particular to an energy-saving filtration device for cleanroom fresh air. Background Technology

[0002] With the rapid development of modern industry, the requirements for the production environment are becoming increasingly stringent, especially in industries such as pharmaceuticals, electronics, and food, where the demand for air cleanliness is extremely stringent. Existing cleanrooms typically employ multi-stage filtration systems to purify the fresh air entering the room; however, these systems have low energy efficiency, resulting in high operating costs. Furthermore, traditional fresh air systems often require frequent filter replacements, increasing maintenance costs and the risk of environmental pollution. In recent years, the application of some new materials and technologies has gradually improved this situation, but many limitations still exist.

[0003] Traditional HEPA filters, while effectively removing particulate matter, suffer from high resistance, high energy consumption, and a short lifespan. Their advantages lie in their maturity, reliability, and wide applicability. Their disadvantages include high energy consumption and frequent maintenance.

[0004] Therefore, although existing technologies each have their own advantages, they generally suffer from problems such as low energy efficiency, high maintenance costs, and secondary pollution in practical applications. Utility Model Content

[0005] In order to improve the fresh air purification effect and reduce energy consumption, this application provides a cleanroom fresh air energy-saving filtration device.

[0006] The cleanroom fresh air energy filtration device provided in this application adopts the following technical solution: A cleanroom fresh air energy-saving filtration device includes a housing, which comprises a main housing, a first side cover, and a second side cover. The first and second side covers are installed on both sides of the main housing and are engaged and fixed to the main housing. A front cover that shields the first and second side covers is installed on the front end of the main housing and is fixedly connected to the main housing. A plurality of air inlet ducts are fixedly installed on the outer side of the first side cover, and a plurality of air outlet ducts are fixedly installed on the outer side of the second side cover. A pre-filter layer, a main filter layer, and an activated carbon adsorption layer are inserted and installed on the front cover. The pre-filter layer, the main filter layer, and the activated carbon adsorption layer are arranged sequentially from the air inlet ducts to the air outlet ducts. An air concentrator is also fixedly installed in the housing, and a negative ion generator is fixedly installed in the air concentrator.

[0007] By adopting the above technical solution, the equipment casing uses a combination structure of a main casing, a first side cover, and a second side cover, which are fixed by snap-fit, facilitating installation and disassembly, and enabling convenient maintenance and repair of the internal components. The front cover conceals the side covers, resulting in a cleaner appearance. The inlet and outlet ducts facilitate the introduction and exhaust of fresh air. The sequential arrangement of the pre-filter layer, main filter layer, and activated carbon adsorption layer provides multi-stage filtration of fresh air, effectively removing pollutants such as dust, particulate matter, and harmful gases. The negative ion generator produces negative ions, improving air quality and making the air fresher.

[0008] Optionally, the main housing includes a bottom plate, a back plate, and a top plate. The top plate and the bottom plate are respectively disposed at the upper and lower ends of the back plate, and the bottom plate, the back plate, and the top plate are integrally formed. The upper and lower ends of the first side cover and the second side cover are provided with positioning slots. The inner sides of the top plate and the bottom plate are fixedly installed with limiting strips that cooperate with the positioning slots.

[0009] By adopting the above technical solution, the bottom plate, back plate and top plate of the main shell are integrally formed, which enhances the structural strength of the main shell, improves the stability and durability of the equipment, and also reduces assembly steps and production costs. The first side cover and the second side cover are engaged with the main shell through positioning slots and limiting strips. This connection method is simple and reliable, which can ensure the accurate installation of the side cover and the main shell, and is also easy to disassemble, making it convenient to clean and maintain the inside of the equipment.

[0010] Optionally, the inner surfaces of the bottom plate and the top plate are provided with a plurality of clamping seats for mounting the pre-filter layer, the main filter layer and the activated carbon adsorption layer, and the clamping seats are fixedly connected to the bottom plate and the top plate.

[0011] By adopting the above technical solution, the clamping seats on the inner sides of the bottom plate and the top plate can fix the pre-filter layer, the main filter layer and the activated carbon adsorption layer, ensuring the installation stability of the filter layer and preventing the filter layer from shaking or shifting during use, thereby affecting the filtration effect.

[0012] Optionally, the front cover has a longitudinal groove for inserting and installing the pre-filter layer, the main filter layer and the activated carbon adsorption layer, and the front cover also has a side groove that communicates with the longitudinal groove, and several magnetic blocks are fixedly installed in the side groove.

[0013] By adopting the above technical solution, the longitudinal groove and side groove on the front cover facilitate the insertion and installation of the pre-filter layer, the main filter layer and the activated carbon adsorption layer. The magnetic block can adsorb and fix the filter layer, making the installation of the filter layer more secure, and also making it easier to disassemble and replace the filter layer.

[0014] Optionally, the pre-filter layer includes a first vertical plate, a first inner frame, and a polyester fiber filter screen, wherein the first inner frame is fixedly installed on the inner side of the first vertical plate, and the polyester fiber filter screen is fixedly installed in the first inner frame.

[0015] By adopting the above technical solution, the pre-filtration layer uses a polyester fiber filter. The polyester fiber filter has good filtration performance and can effectively intercept large particles of dust and debris in the air, playing a preliminary filtration role and protecting the subsequent main filtration layer and activated carbon adsorption layer.

[0016] Optionally, the main filter layer includes a second vertical plate, a second inner frame, and a PTFE nanofiber membrane, wherein the second inner frame is fixedly installed on the inner side of the second vertical plate, and the PTFE nanofiber membrane is fixedly installed in the second inner frame.

[0017] By adopting the above technical solution, the main filter layer uses a PTFE nanofiber membrane. The PTFE nanofiber membrane has high filtration performance and can filter out pollutants such as tiny particles and bacteria in the air, further improving the cleanliness of the air.

[0018] Optionally, the activated carbon adsorption layer includes a third vertical plate, a third inner frame, and an activated carbon mesh. The third inner frame is fixedly installed on the inner side of the third vertical plate, and the activated carbon mesh is fixedly installed in the third inner frame.

[0019] By adopting the above technical solution, the activated carbon adsorption layer uses an activated carbon mesh. Activated carbon has a strong adsorption capacity and can adsorb pollutants such as harmful gases and odors in the air, making the air fresher and healthier.

[0020] Optionally, a metal pull ring that cooperates with the magnetic block is rotatably installed on the outer surface of the first, second, and third vertical plates, and the metal pull ring is rotatably connected to the first, second, and third vertical plates.

[0021] By adopting the above technical solution, the metal pull ring and magnetic block work together to not only facilitate the installation and removal of the filter layer, but also ensure a tight connection between the filter layer and the front cover, prevent air leakage, and guarantee the filtration effect.

[0022] Optionally, the wind-gathering frame includes a central frame and bent wind plates, the bent wind plates being symmetrically arranged at the upper and lower ends of the central frame and fixedly connected to the central frame.

[0023] By adopting the above technical solution, the bent air vane of the air-gathering frame can guide and concentrate the airflow, allowing fresh air to pass more concentratedly through the negative ion generator, improving the diffusion effect of negative ions, and thus better improving air quality.

[0024] Optionally, several sets of positioning seats are fixedly installed on the inner side of the first inner frame, and a swing motor is fixedly installed on one side of the positioning seat. A mesh scraper is installed at the output end of the swing motor.

[0025] By adopting the above technical solution and setting a positioning seat to ensure the stable installation of the swing motor, the swing motor can drive the mesh scraper to clean the impurities on the polyester fiber filter screen during use. This can effectively ensure the air permeability of the polyester fiber filter screen, thereby increasing the gas permeability and achieving the purpose of energy saving.

[0026] In summary, this application includes at least one of the following beneficial technical effects: The cleanroom fresh air energy-saving filtration device of this application, through reasonable structural design and a multi-stage filtration system, can effectively remove various pollutants in the air and improve air cleanliness. Simultaneously, the equipment is easy to install and maintain, structurally stable, and highly durable. The negative ion generator and air-concentrating frame further improve air quality, making the air fresher and healthier. The overall design combines multiple filtration stages with a negative ion generator, thoroughly removing various pollutants from the air and meeting high-standard cleanroom requirements. The main filter layer uses low-resistance nanofiber membrane material, significantly reducing airflow resistance and fan power consumption. Simultaneously, the air-concentrating frame ensures that the airflow can flow directly into the outlet duct assembly during the air outlet process, preventing turbulent airflow and increasing the smoothness of gas flow, thus achieving a certain energy-saving effect. Furthermore, during use, a swing motor can drive a scraper to clean impurities on the polyester fiber filter screen, effectively ensuring the air permeability of the polyester fiber filter screen and achieving further energy savings. Attached Figure Description

[0027] Figure 1 This is an exploded structural diagram of the overall structure in the embodiments of this application.

[0028] Figure 2 This is a front view of the device housing in an embodiment of this application.

[0029] Figure 3 This is a front view of the front cover in an embodiment of this application.

[0030] Figure 4 yes Figure 3 Front view of the device shown.

[0031] Figure 5 This is a perspective view of the wind-gathering frame in the embodiments of this application; Figure 6 This is a perspective view of the pre-filter layer, positioning seat, swing motor and mesh scraper in the embodiments of this application. Figure 7 yes Figure 6 Top view of the device shown.

[0032] Explanation of reference numerals in the attached drawings: 1. Equipment housing; 11. Main housing; 111. Base plate; 112. Back plate; 113. Top plate; 114. Limiting strip; 115. Clamping seat; 12. First side cover; 13. Second side cover; 2. Front cover; 21. Longitudinal groove; 22. Side groove; 23. Magnetic block; 3. Air inlet duct assembly; 4. Air outlet duct assembly; 5. Pre-filter layer; 501. Positioning seat; 502. Swing motor; 50 3. Mesh scraper; 51. First vertical plate; 511. Metal pull ring; 52. First inner frame; 53. Polyester fiber filter screen; 6. Main filter layer; 61. Second vertical plate; 62. Second inner frame; 63. PTFE nanofiber membrane; 7. Activated carbon adsorption layer; 71. Third vertical plate; 72. Third inner frame; 73. Activated carbon mesh; 8. Wind concentrator frame; 81. Middle frame; 82. Bending wind vane; 9. Negative ion generator. Detailed Implementation

[0033] The present application will be further described in detail below with reference to the accompanying drawings.

[0034] This application discloses an energy-saving filtration device for fresh air in clean rooms. (Refer to...) Figure 1 , Figure 2 and Figure 3 As shown, a cleanroom fresh air energy-saving filtration device includes a housing 1, which includes a main housing 11, a first side cover 12, and a second side cover 13. The first side cover 12 and the second side cover 13 are installed on both sides of the main housing 11 and are engaged and fixed to the main housing 11. A front cover 2 is installed on the front end of the main housing 11 to cover the first side cover 12 and the second side cover 13. The front cover 2 is fixedly connected to the main housing 11. Several air inlet pipe groups 3 are fixedly installed on the outer side of the first side cover 12, and a fan is installed in the air inlet pipe group 3. Several air outlet pipe groups 4 are fixedly installed on the outer side of the second side cover 13. A pre-filter layer 5, a main filter layer 6, and an activated carbon adsorption layer 7 are inserted and installed on the front cover 2. The pre-filter layer 5, the main filter layer 6, and the activated carbon adsorption layer 7 are arranged sequentially from the air inlet pipe group 3 to the air outlet pipe group 4. An air concentrator 8 is also fixedly installed in the housing 1, and a negative ion generator 9 is fixedly installed in the air concentrator 8. The equipment housing 1 adopts a combined structure of a main housing 11, a first side cover 12, and a second side cover 13, which are fixed by snap-fit, facilitating installation and disassembly, and enabling convenient maintenance and repair of the internal components. The front cover 2 conceals the side covers, resulting in a cleaner appearance. The air inlet duct assembly 3 and the air outlet duct assembly 4 facilitate the introduction and exhaust of fresh air. The sequential arrangement of the pre-filter layer 5, the main filter layer 6, and the activated carbon adsorption layer 7 provides multi-stage filtration of fresh air, effectively removing dust, particulate matter, harmful gases, and other pollutants. The negative ion generator 9 produces negative ions, improving air quality and making the air fresher.

[0035] Reference Figure 1 and Figure 2 As shown, the main housing 11 includes a bottom plate 111, a back plate 112, and a top plate 113. The top plate 113 and the bottom plate 111 are respectively disposed at the upper and lower ends of the back plate 112, and the bottom plate 111, back plate 112, and top plate 113 are integrally formed. The integral formation of the bottom plate 111, back plate 112, and top plate 113 of the main housing 11 enhances the structural strength of the main housing 11, improves the stability and durability of the equipment, and also reduces assembly steps and lowers production costs. Positioning slots are provided at both the upper and lower ends of the first side cover 12 and the second side cover 13. Limiting strips 114 that cooperate with the positioning slots are fixedly installed on the inner surfaces of the top plate 113 and the bottom plate 111. The first side cover 12 and the second side cover 13 are engaged with the main housing 11 through the positioning slots and the limiting strips 114. This connection method is simple and reliable, ensuring accurate installation of the side covers and the main housing 11, and also facilitating disassembly for cleaning and maintenance of the equipment's interior. The inner surfaces of the base plate 111 and the top plate 113 are provided with several clamping seats 115 for mounting the pre-filter layer 5, the main filter layer 6, and the activated carbon adsorption layer 7. The clamping seats 115 are fixedly connected to the base plate 111 and the top plate 113. The clamping seats 115 on the inner surfaces of the base plate 111 and the top plate 113 can fix the pre-filter layer 5, the main filter layer 6, and the activated carbon adsorption layer 7, ensuring the installation stability of the filter layers and preventing the filter layers from shaking or shifting during use, thereby affecting the filtration effect.

[0036] Reference Figure 3 and Figure 4 As shown, the front cover 2 has a longitudinal groove 21 for inserting and installing the pre-filter layer 5, the main filter layer 6, and the activated carbon adsorption layer 7. The front cover 2 also has a side groove 22 connected to the longitudinal groove 21, in which several magnetic blocks 23 are fixedly installed. The longitudinal groove 21 and side groove 22 on the front cover 2 facilitate the insertion and installation of the pre-filter layer 5, the main filter layer 6, and the activated carbon adsorption layer 7. The magnetic blocks 23 can adsorb and fix the filter layers, making the installation of the filter layers more secure, and also facilitating the disassembly and replacement of the filter layers.

[0037] Reference Figure 1As shown, the pre-filter layer 5 includes a first vertical plate 51, a first inner frame 52, and a polyester fiber filter 53. The first inner frame 52 is fixedly installed on the inner side of the first vertical plate 51, and the polyester fiber filter 53 is fixedly installed in the first inner frame 52. The pre-filter layer 5 uses a polyester fiber filter 53, which has good filtration performance and can effectively intercept large particles of dust and debris in the air, playing a preliminary filtration role and protecting the subsequent main filter layer 6 and activated carbon adsorption layer 7. The main filter layer 6 includes a second vertical plate 61, a second inner frame 62, and a PTFE nanofiber membrane 63. The second inner frame 62 is fixedly installed on the inner side of the second vertical plate 61, and the PTFE nanofiber membrane 63 is fixedly installed in the second inner frame 62. The main filter layer 6 uses a PTFE nanofiber membrane 63, which has high-efficiency filtration performance and can filter out small particles and bacteria and other pollutants in the air, further improving air cleanliness. The activated carbon adsorption layer 7 includes a third vertical plate 71, a third inner frame 72, and an activated carbon mesh 73. The third inner frame 72 is fixedly installed on the inner side of the third vertical plate 71, and the activated carbon mesh 73 is fixedly installed in the third inner frame 72. The activated carbon adsorption layer 7 uses the activated carbon mesh 73. Activated carbon has a strong adsorption capacity and can adsorb pollutants such as harmful gases and odors in the air, making the air fresher and healthier. Metal pull rings 511 that cooperate with magnetic blocks 23 are rotatably installed on the outer surfaces of the first vertical plate 51, the second vertical plate 61, and the third vertical plate 71. The metal pull rings 511 are rotatably connected to the first vertical plate 51, the second vertical plate 61, and the third vertical plate 71. The metal pull rings 511 cooperate with the magnetic blocks 23, which not only facilitates the installation and removal of the filter layer, but also ensures a tight connection between the filter layer and the front cover 2, preventing air leakage and ensuring the filtration effect. The pre-filter layer 5 is made of polyester fiber with a thickness of 5mm and a pore size of 10μm; the main filter layer 6 is made of PTFE nanofiber membrane 63 with a thickness of 0.5mm and a pore size of 0.1μm; the activated carbon adsorption layer 7 is made of coconut shell activated carbon with a filling amount of 1kg / m³; the negative ion generator 9 is a ceramic discharge needle type negative ion generator 9 with a voltage of 6kV and a current of 1mA.

[0038] Reference Figure 1 and Figure 5 As shown, the air-concentrating frame 8 includes a central frame 81 and bent air panels 82. The bent air panels 82 are symmetrically arranged at the upper and lower ends of the central frame 81 and are fixedly connected to the central frame 81. The bent air panels 82 of the air-concentrating frame 8 can guide and concentrate the airflow, allowing fresh air to pass more concentratedly through the negative ion generator 9, improving the diffusion effect of negative ions, and thus better improving air quality.

[0039] Reference Figure 6 and Figure 7As shown, several sets of positioning seats 501 are fixedly installed on the inner side of the first inner frame 52. A swing motor 502 is fixedly installed on one side of the positioning seat 501, and a mesh scraper 503 is installed at the output end of the swing motor 502. By setting the positioning seats 501, the swing motor 502 is stably installed. During use, the swing motor 502 can drive the mesh scraper 503 to clean impurities on the polyester fiber filter screen 53. This can effectively ensure the air permeability of the polyester fiber filter screen 53, thereby increasing the gas permeability and achieving the purpose of energy saving.

[0040] The implementation principle of the cleanroom fresh air energy-saving filtration device in this application embodiment is as follows: When needed, the pre-filter layer 5, main filter layer 6, and activated carbon adsorption layer 7 are inserted through the longitudinal groove 21 on the front cover 2, and the metal pull rings 511 on the outer surfaces of the first vertical plate 51, the second vertical plate 61, and the third vertical plate 71 are attracted and fixed to the magnetic blocks 23 in the side groove 22. At the same time, the edges of the filter layers cooperate with the clamping seats 115 on the inner surfaces of the bottom plate 111 and the top plate 113 to ensure stable installation.

[0041] During operation, fresh air enters the equipment casing 1 through the air inlet duct assembly 3. It first passes through the pre-filter layer 5, where a polyester fiber filter 53 intercepts large particles of dust and debris. The pre-filtered air then passes through the main filter layer 6, where a PTFE nanofiber membrane 63 filters out fine particles and bacteria. Next, the air passes through the activated carbon adsorption layer 7, where an activated carbon mesh 73 adsorbs harmful gases and odors. Guided by the air concentrator 8, the multi-stage filtered air is more concentrated and passes through the negative ion generator 9, generating negative ions. Finally, it is discharged into the cleanroom through the air outlet duct assembly 4. Throughout the process, the control system monitors the operating status of each component in real time, adjusting the fan speed and the power of the negative ion generator 9 to achieve optimal purification effect and minimum energy consumption.

[0042] After the filter layer has been used for a period of time, the metal pull ring 511 can be rotated to separate it from the magnetic block 23, and then the pre-filter layer 5, main filter layer 6 and activated carbon adsorption layer 7 can be pulled out from the longitudinal groove 21 for replacement or cleaning. At the same time, the inside of the equipment can be cleaned and maintained by removing the first side cover 12 and the second side cover 13.

[0043] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A cleanroom fresh air energy-saving filtration device, comprising a housing (1), characterized in that: The equipment housing (1) includes a main housing (11), a first side cover (12), and a second side cover (13). The first side cover (12) and the second side cover (13) are installed on both sides of the main housing (11), and both the first side cover (12) and the second side cover (13) are engaged and fixed to the main housing (11). A front cover (2) is installed on the front end face of the main housing (11) to cover the first side cover (12) and the second side cover (13). The front cover (2) is fixedly connected to the main housing (11), and the outer side surface of the first side cover (12) is fixedly fixed. A number of air inlet pipe groups (3) are fixedly installed. A number of air outlet pipe groups (4) are fixedly installed on the outer side surface of the second side cover (13). A pre-filter layer (5), a main filter layer (6) and an activated carbon adsorption layer (7) are inserted and installed on the front cover (2). The pre-filter layer (5), the main filter layer (6) and the activated carbon adsorption layer (7) are arranged in sequence from the air inlet pipe group (3) to the air outlet pipe group (4). A wind concentrator (8) is also fixedly installed in the equipment shell (1). A negative ion generator (9) is fixedly installed in the wind concentrator (8).

2. The cleanroom fresh air energy-saving filtration device according to claim 1, characterized in that: The main housing (11) includes a bottom plate (111), a back plate (112) and a top plate (113). The top plate (113) and the bottom plate (111) are respectively disposed at the upper and lower ends of the back plate (112), and the bottom plate (111), the back plate (112) and the top plate (113) are integrally formed. The upper and lower ends of the first side cover (12) and the second side cover (13) are provided with positioning slots. The inner sides of the top plate (113) and the bottom plate (111) are fixedly installed with limiting strips (114) that cooperate with the positioning slots.

3. The cleanroom fresh air energy-saving filtration device according to claim 2, characterized in that: The inner surfaces of the bottom plate (111) and the top plate (113) are provided with a number of clamping seats (115) for mounting the pre-filter layer (5), the main filter layer (6) and the activated carbon adsorption layer (7). The clamping seats (115) are fixedly connected to the bottom plate (111) and the top plate (113).

4. The cleanroom fresh air energy-saving filtration device according to claim 3, characterized in that: The front cover (2) has a longitudinal groove (21) for inserting and installing the pre-filter layer (5), the main filter layer (6) and the activated carbon adsorption layer (7), and the front cover (2) also has a side groove (22) connected to the longitudinal groove (21), and a number of magnetic blocks (23) are fixedly installed in the side groove (22).

5. The cleanroom fresh air energy-saving filtration device according to claim 4, characterized in that: The pre-filter layer (5) includes a first vertical plate (51), a first inner frame (52) and a polyester fiber filter (53). The first inner frame (52) is fixedly installed on the inner side of the first vertical plate (51), and the polyester fiber filter (53) is fixedly installed in the first inner frame (52).

6. The cleanroom fresh air energy-saving filtration device according to claim 5, characterized in that: The main filter layer (6) includes a second vertical plate (61), a second inner frame (62) and a PTFE nanofiber membrane (63). The second inner frame (62) is fixedly installed on the inner side of the second vertical plate (61), and the PTFE nanofiber membrane (63) is fixedly installed in the second inner frame (62).

7. A cleanroom fresh air energy-saving filtration device according to claim 6, characterized in that: The activated carbon adsorption layer (7) includes a third vertical plate (71), a third inner frame (72) and an activated carbon mesh (73). The third inner frame (72) is fixedly installed on the inner side of the third vertical plate (71), and the activated carbon mesh (73) is fixedly installed in the third inner frame (72).

8. A cleanroom fresh air energy-saving filtration device according to claim 7, characterized in that: Metal pull rings (511) that cooperate with magnetic blocks (23) are rotatably installed on the outer surfaces of the first vertical plate (51), the second vertical plate (61) and the third vertical plate (71). The metal pull rings (511) are rotatably connected to the first vertical plate (51), the second vertical plate (61) and the third vertical plate (71).

9. A cleanroom fresh air energy-saving filtration device according to claim 8, characterized in that: The wind-gathering frame (8) includes a middle frame (81) and a bent wind plate (82). The bent wind plate (82) is symmetrically arranged at the upper and lower ends of the middle frame (81) and is fixedly connected to the middle frame (81).

10. A cleanroom fresh air energy-saving filtration device according to claim 9, characterized in that: Several sets of positioning seats (501) are fixedly installed on the inner side of the first inner frame (52). A swing motor (502) is fixedly installed on one side of the positioning seat (501), and a mesh scraper (503) is installed at the output end of the swing motor (502).

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