A multiple filter device for filtering compressed air

Abstract

The present application relates to a multiple filtering device for filtering compressed air, and relates to the technical field of compressed air production and purification. The multiple filtering device comprises a shell, a pre-filter, a main filter and a fine filter. The inner cavity of the shell is provided with a pre-filter, and a main filter is provided on one side of the pre-filter, and a fine filter is provided on the side of the main filter away from the pre-filter. An air inlet is installed on the side end face of the shell, and the air inlet is specifically located on the side of the pre-filter away from the main filter, and an air outlet is provided on the side of the shell away from the air inlet. The present application adopts a multi-stage filtering device in combination, avoiding the conventional air filtering mechanism used for compressed air production to adopt a one-stage filtering method, solving the problem of poor filtering effect, avoiding affecting the quality of subsequent compressed air, avoiding damage to the air compressor used for compressed air production, and also avoiding the problem of easily causing unstable filtering effect and high subsequent maintenance cost of the filtering device.

Description

Technical Field

[0001] The present application relates to the technical field of compressed air production and purification, and in particular to a multiple filtering device for filtering compressed air. Background Art

[0002] A compressed air filter is a device used to remove impurities from compressed air, such as dust, oil, rust, and moisture. It is usually installed in the piping system after the air compressor to ensure the supply of clean, dry compressed air, which is essential for many industrial applications. Compressed air, as an important power source, plays an indispensable role in industrial production. In order to ensure the cleanliness of compressed air, compressed air production systems are usually equipped with filtering mechanisms to remove impurities that may exist in the air. However, traditional air filtering mechanisms mostly use a single-stage filtration method. Although this can reduce dust particles in the air to a certain extent, it has limited filtering effects on fine dust, oil mist, and other harmful substances, which seriously affects the overall quality and production efficiency of compressed air. With the increasing requirements of the manufacturing industry for environmental conditions, how to effectively improve the purification level of compressed air has become one of the technical problems that need to be solved urgently; In the prior art, the technology related to compressed air production and purification can refer to the Chinese patent application number CN202010601892.6, which discloses a compressed air filter, including a shell and a filter element connected to the inside of the shell, and a first valve connected to the bottom of the shell. This compressed air filter can be controlled to be connected to the inside of the compressed air filter through a detection connection device. When the device detects that the water level inside the filter reaches a certain position, the water containing residues is discharged from the filter. At the same time, the device can scrape off the impurities attached to the inner wall of the filter and discharge them from the inside of the filter. When the water is drained, the connection is closed. When the water accumulated inside the device reaches a certain height, the water storage is depressurized and then the water in the water storage is poured out, so as to avoid the need to stop the compressed air filter when the water inside the compressed air filter is discharged, thereby reducing the working efficiency of the compressed air filter and improving the cleanliness of the inside of the compressed air filter for better use. The drainage method solves the problem that the working filter must be stopped to drain the water, which reduces the working efficiency of the compressed air filter. The filtered water contains a lot of debris particles, and the debris particles in the water are likely to stick to the inner wall of the filter. During long-term use, a large number of foreign particles may adhere to the bottom of the filter. Moreover, the position of the water at the bottom of the filter is consistent with the trajectory of the filtered air movement inside it. A large number of foreign particles are likely to pollute the filtered air.

[0003] In the process of realizing the present application, the inventors discovered that the prior art has the following problems: the existing compressed air filtration methods mainly include water washing method, centrifugal separation method, dry filtration method and other means. The above-mentioned device adopts water washing method to remove dust and moisture in the air through water flow. Although it solves the problem of easy secondary pollution, the water washing method causes the device to have high energy consumption; and although these traditional methods have their own advantages, they also generally have the disadvantages of unstable filtration effect and high maintenance cost. Although there are many compressed air filtration technologies, they generally adopt a single-stage or multi-stage simple superposition method, and have not formed a scientific and reasonable filtration level configuration, resulting in poor overall filtration efficiency, which cannot fully meet the high standards of compressed air quality in modern industrial production. Summary of the invention

[0004] The purpose of the present application is to provide a multiple filter device for filtering compressed air.

[0005] The present application provides a multiple filtering device for filtering compressed air using the following technical solution: A multiple filtering device for filtering compressed air, comprising a shell, a pre-filter, a main filter and a fine filter, the inner cavity of the shell is provided with a pre-filter, and a main filter is provided on one side of the pre-filter, a fine filter is provided on the side of the main filter away from the pre-filter, an air inlet is installed on the side end surface of the shell, and the air inlet is specifically located on the side of the pre-filter away from the main filter, an air outlet is provided on the side of the shell away from the air inlet, the pre-filter comprises a first frame and a metal mesh layer, both sides of the first frame are provided with metal mesh layers, and a foam sponge layer is provided between two groups of the metal mesh layers, the main filter comprises a second frame and a HEPA high-efficiency filter, the first HEPA high-efficiency filters are arranged on both sides of the two frames, the fine filter includes a third frame and a metal mesh box, polyvinylidene fluoride filter membranes are arranged on both sides of the third frame, an activated carbon filter block is placed in the inner cavity of the metal mesh box, the first frame, the second frame and the third frame are respectively wrapped by a metal mesh layer, a HEPA high-efficiency filter and a polyvinylidene fluoride filter membrane, the air outlet is connected to a temperature and humidity adjustment module through an air pipe, a dust scraper is arranged on one side of the first frame, the second frame and the third frame, and the dust scraper is slidably connected to the first frame, the second frame and the third frame, and pull ropes are arranged on both sides of both ends of the dust scraper, and the pull ropes surround the guide wheel toward the same side.

[0006] By adopting the above technical solution, firstly, compressed gas is infused into the inner cavity of the shell through the air inlet, wherein the pre-filter is located at the front end of the entire system, and is responsible for the preliminary removal of larger dust and other impurities in the air, and a metal mesh layer and a foam sponge layer are arranged inside the pre-filter, and the metal mesh layer can block larger hard particles, and the foam sponge layer can adsorb some lightweight fiber materials, thereby isolating impurities, and then the pre-treated air enters the main filter, wherein the main filter adopts HEPA high-efficiency filter mesh as the core filter material, which can effectively capture PM2.5 level fine particles, and further obtain clean compressed gas, and finally the air enters the fine filter stage, and through the principle of activated carbon adsorption, the residual oil mist and odor in the gas are further removed to ensure that the compressed air finally discharged meets the standard.

[0007] The first frame, metal mesh layer and foam sponge layer in the pre-filter are arranged in several groups, the second frame and HEPA high-efficiency filter net in the main filter are arranged in several groups, and the third frame and polyvinylidene fluoride filter membrane in the fine filter are arranged in two groups.

[0008] By adopting the above technical solution, the first frame, metal mesh layer and foam sponge layer in the pre-filter and the second frame and HEPA high-efficiency filter in the main filter are arranged in several groups, so that the gas is filtered through several groups of filtering mechanisms, and then the impurities are isolated, so as to obtain clean gas.

[0009] A plurality of groups of the first frames and a plurality of groups of the second frames are evenly arranged, and the metal mesh boxes and the activated carbon filter blocks are installed between two groups of the third frames and the polyvinylidene fluoride filter membranes.

[0010] By adopting the above technical scheme, a third frame and a polyvinylidene fluoride filter membrane are respectively installed on both sides of the metal mesh box and the activated carbon filter block, which is beneficial to limit the metal mesh box and the activated carbon filter block and facilitate the gas to pass through the activated carbon filter block in the metal mesh box stably, thereby facilitating the fine filter to remove oil mist and odor.

[0011] The bottom end surface and the top end surface of the shell cavity are both provided with limit plates, and the opposite surfaces of the two groups of limit plates are dug with sliding grooves, and the upper end surfaces and the bottom end surfaces of the first frame, the second frame, the third frame and the metal mesh box are all provided with sliding blocks.

[0012] By adopting the above technical scheme, the first frame, the second frame, the third frame and the metal mesh box are connected to the shell through sliders and slide grooves, so that the first frame, the second frame, the third frame and the metal mesh box are easy to disassemble and install, and the metal mesh layer and the foam sponge layer in the pre-filter are both wearing parts, so that the replacement frequency can be flexibly adjusted according to the frequency of use and on-site environmental conditions. At the same time, the HEPA high-efficiency filter in the main filter also belongs to the category of consumables. Once serious blockage or obvious decline in efficiency is found, it needs to be updated. The activated carbon filling amount of the fine filter can also be increased or decreased to adapt to different workload requirements. The easy disassembly structure is conducive to the subsequent maintenance of the first frame, the second frame, the third frame and the metal mesh box.

[0013] A placement door is installed on the side end face of the shell through a hinge, and an observation window is arranged on the side end face of the shell. The bottom end face of the shell is connected to a pressure relief valve, an air pump is arranged on one side of the temperature and humidity adjustment module, and dust suppression nozzles are evenly arranged on the side wall of the inner cavity of the shell.

[0014] By adopting the above technical scheme, after the gas is filtered by the pre-filter, the main filter and the fine filter, the gas flow rate will be reduced, which may easily lead to excessive pressure in the inner cavity of the shell. The gas in the inner cavity of the shell is extracted by the vacuum pump, thereby accelerating the gas flow rate and avoiding excessive pressure in the inner cavity of the shell. At the same time, the door can be used to place the first frame, the second frame, the third frame and the metal mesh box. The filtering conditions of the first frame, the second frame, the third frame and the metal mesh box can be observed through the observation window, and the pressure in the inner cavity of the shell is further monitored by the pressure relief valve, so as to ensure the normal operation of the device and the safety of the operation of the device. The dust suppression nozzle is connected to the external water pump through the air pipe, and the dust scraper is connected to the electric The movable roller is driven by the electric roller to move the pulling rope, thereby driving the scraper plate to slide along the frame, and the pulling ropes on both ends of the scraper plate are directed to the same side through the guide wheel, and the pulling ropes are all connected to the electric roller, or the pulling ropes are manually pulled, so that the scraper plate scrapes the side of the filter frame that filters dust, and at the same time, the dust reduction nozzle is started, and the dust reduction nozzle sprays water to reduce the dust. By timely removing impurities on the frame, the use time of the device is increased, and the filtering efficiency is improved. Among them, by manually or automatically cleaning one side of the filter frame, the filtering speed can also be increased. Through the above structure, the dust on one side of the filter frame can be cleaned in time, which is helpful for the next filtering, and it is also beneficial to increase the service life of the filter frame.

[0015] The outer surface of the metal mesh layer is sprayed with a nano silver coating, the first frame, the second frame and the third frame are all in the shape of grid plates, and the outer surfaces of the first frame, the second frame, the third frame and the metal mesh box are sprayed with a nano silver coating.

[0016] By adopting the above technical scheme, the nano-silver coating has the advantages of broad-spectrum antibacterial, strong bactericidal, strong permeability, long-lasting antibacterial and no drug resistance. While filtering the gas, the nano-silver coating is used to sterilize the gas, thereby enhancing the hygienic safety of the air.

[0017] The air inlet forms a connecting structure with the air outlet through the shell, the first frame, the second frame, the third frame and the metal mesh box form a sliding connection structure through the sliding groove dug by the slider and the limit plate, and the pre-filter, the main filter and the fine filter form a connecting structure.

[0018] By adopting the above technical solution, when the untreated compressed air is sucked into the system, the large particles of impurities are first removed through the pre-filter to reduce the pressure of the subsequent filter unit. Then, when the air passes through the main filter, the fine particles are captured by the HEPA filter paper to complete the second purification. After that, the air enters the fine filter link. The activated carbon here can absorb the residual oil mist and odor molecules to ensure that the output compressed air is absolutely clean and pollution-free. The three filter units in this device work together to form a complete and efficient air purification process.

[0019] The temperature and humidity adjustment module is composed of an air guide tank, a temperature and humidity sensor, a heating rod and a temperature controller, wherein the inner cavity of the air guide tank is provided with a plurality of groups of heating rods, and the temperature and humidity sensor is installed in the inner cavity of the air guide tank, and the temperature and humidity sensor and the heating rod are electrically connected to the temperature controller, the shell forms a connecting structure with the input end of the air pump through an air pipe, and the output end of the air pump forms a connecting structure with the air guide tank in the temperature and humidity adjustment module through an air pipe.

[0020] By adopting the above technical solution, a temperature and humidity adjustment module is added to dynamically adjust the air quality parameters entering the filtration system according to the climate characteristics of different seasons and regions, thereby further optimizing the gas purification effect.

[0021] The placement door is connected to the shell through a hinge to form a rotating structure that rotates around the center of the hinge. The contact surface between the placement door and the shell is provided with a sealing ring. The placement door is limitedly connected to the shell through bolts. The contact surfaces between the shell and the observation window, the pressure relief valve, the air pump and the air pipe are all provided with sealing rings.

[0022] By adopting the above technical solution, the placement door is connected to the shell through a hinge to form a rotating structure that rotates around the center of the hinge, and the placement door is limitedly connected to the shell through bolts. Through the above structure, it is convenient to place the first frame, the second frame, the third frame and the metal mesh box into the inner cavity of the shell through sliders and slide grooves, and at the same time, the sealing ring is installed on the contact surface between the placement door and the shell and the contact surface between the shell and the observation window, the pressure relief valve, the vacuum pump and the air pipe, thereby ensuring the sealing of the device, which is conducive to filtering the gas.

[0023] In summary, the present application includes at least one of the following beneficial technical effects: 1. The device adopts a combination of multi-stage filtering devices to avoid the conventional air filtering mechanism used for compressed air production using a single-stage filtering method, which leads to poor filtering effect, not only affecting the quality of subsequent compressed air, but also causing damage to the air compressor used for compressed air production. First, compressed gas is infused into the inner cavity of the shell through the air inlet, and the pre-filter is located at the front end of the entire system, responsible for the preliminary removal of larger dust and other impurities in the air. The pre-filter is provided with a metal mesh layer and a foam sponge layer. The metal mesh layer can block larger hard particles, and the foam sponge layer can absorb some lightweight fiber materials, thereby isolating impurities. The pre-treated air then enters the main filter, and the main filter adopts HEPA As the core filter material, the high-efficiency filter can effectively capture PM2.5-level fine particles, and then further obtain clean compressed gas. Finally, the air enters the fine filter stage, and through the principle of activated carbon adsorption, the residual oil mist and odor in the gas are further removed to ensure that the compressed air discharged finally meets the standard. When the untreated compressed air is sucked into the system, the pre-filter removes large particle impurities to reduce the pressure of the subsequent filter unit. Then when the air passes through the main filter, the fine particles are captured by the HEPA filter paper to complete the second purification. After that, the air enters the fine filter link. The activated carbon here can absorb the residual oil mist and odor molecules to ensure that the output compressed air is absolutely clean and pollution-free. The three filter units in this device work together to form a complete and efficient air purification process. 2. The device effectively removes various impurities in the air, including dust, oil mist, odor, etc., through a multi-stage filtration combination, so that the compressed air reaches a higher standard of purity and significantly improves the cleanliness of the compressed air. The gas is filtered through several groups of filtering mechanisms to isolate the impurities, thereby obtaining clean gas. A third frame and a polyvinylidene fluoride filter membrane are installed on both sides of the metal mesh box and the activated carbon filter block, respectively, which is conducive to limiting the metal mesh box and the activated carbon filter block and facilitating the gas to stably pass through the activated carbon filter block in the metal mesh box, which is conducive to the fine filter to remove oil mist and odor. The nano-silver coating has the advantages of broad-spectrum antibacterial, strong bactericidal, strong permeability, long-lasting antibacterial and no drug resistance. While filtering the gas, the nano-silver coating is used to sterilize and disinfect the gas to enhance the hygienic safety of the air.

[0024] 3. The operation stability of the air compressor is improved. Since the quality of air input to the compressor is effectively guaranteed, the risk of wear and failure of mechanical equipment due to inhalation of bad gas is reduced, thereby extending the life of the equipment. After the gas is filtered by the pre-filter, the main filter and the fine filter, the gas flow rate will be reduced, which may easily lead to excessive pressure in the inner cavity of the shell. The gas in the inner cavity of the shell is extracted by the vacuum pump, thereby accelerating the gas flow rate and avoiding excessive pressure in the inner cavity of the shell. At the same time, the door can be used to place the first frame, the second frame, the third frame and the metal mesh box. The filtering conditions of the first frame, the second frame, the third frame and the metal mesh box can be observed through the observation window. The pressure in the inner cavity of the shell is further monitored by the pressure relief valve to ensure the normal operation of the device and the safety of the operation of the device. 4. Reduced maintenance costs. Compared with the traditional single filtration mode, the multi-stage filtration system can maintain efficient operation for a longer period of time, reducing the frequency of filter element replacement and maintenance times, saving a lot of operation and maintenance expenses for the enterprise. The first frame, the second frame, the third frame and the metal mesh box are connected to the shell through sliders and slides, which is convenient for disassembly and installation of the first frame, the second frame, the third frame and the metal mesh box. The metal mesh layer and the foam sponge layer in the pre-filter are both wearing parts, so that the replacement frequency can be flexibly adjusted according to the frequency of use and on-site environmental conditions. At the same time, the HEPA high-efficiency filter in the main filter is also a consumable material. Once it is found to be seriously blocked or the efficiency is significantly reduced, it needs to be updated. The activated carbon filling amount of the fine filter can also be increased or decreased to adapt to different working conditions. The first frame, the second frame, the third frame and the metal mesh box can be easily disassembled to meet the load requirements. The structure is easy to disassemble, which is conducive to the subsequent maintenance of the first frame, the second frame, the third frame and the metal mesh box. Since the placement door is connected to the shell through a hinge to form a rotating structure that rotates around the hinge center, and the placement door is limitedly connected to the shell through bolts, it is convenient to place the first frame, the second frame, the third frame and the metal mesh box into the inner cavity of the shell through the slider and the slide groove. At the same time, the sealing ring is installed on the contact surface between the placement door and the shell and the contact surface between the shell and the observation window, the pressure relief valve, the air pump and the air pipe, thereby ensuring the sealing of the device, which is conducive to filtering the gas, and by adding a temperature and humidity adjustment module, the air quality parameters entering the filtration system can be dynamically adjusted according to the climate characteristics of different seasons and regions, so as to further optimize the gas purification effect; 5. The dust reduction nozzle is connected to an external water pump through an air pipe, and the dust scraper is connected to an electric roller through a pulling rope, and the pulling rope is driven by the electric roller to move, thereby driving the dust scraper to slide along the frame, and the pulling ropes on both ends of the dust scraper are directed to the same side through guide wheels, and the pulling ropes are all connected to the electric roller, or the pulling ropes are manually pulled, so that the dust scraper scrapes the side of the filter frame that filters dust, and at the same time, the dust reduction nozzle is started, and the dust reduction nozzle sprays water to reduce dust, and by timely removing impurities on the frame, thereby increasing the use time of the device, it is also beneficial to improve the filtration efficiency, wherein one side of the filter frame is manually or automatically cleaned, and the filtration speed can also be increased. Through the above structure, the dust on one side of the filter frame can be cleaned in time, which is helpful for the next filtration, and at the same time, it is also beneficial to increase the service life of the filter frame. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 is a schematic diagram of the three-dimensional structure of the housing of Example 1 of the present application; Figure 2 is a front view structural schematic diagram of the housing of Example 1 of the present application; Figure 3 is a schematic diagram of the front cross-sectional structure of the shell of Example 1 of the present application; Figure 4 It is a schematic diagram of the three-dimensional structure of the first frame of Example 1 of the present application; Figure 5 It is a schematic diagram of a partial cross-sectional structure of the first frame of Example 1 of the present application; Figure 6 is a schematic diagram of the side cross-sectional structure of the housing of Example 1 of the present application; Figure 7 It is a schematic diagram of the three-dimensional structure of the second frame of Example 1 of the present application; Figure 8 It is a schematic diagram of the three-dimensional structure of the third frame of Example 1 of the present application; Fig. 9 It is a schematic diagram of the three-dimensional structure of the metal mesh box in Example 1 of the present application; Fig.10 It is a schematic diagram of the side cross-section structure of the first frame of Example 1 of the present application; Explanation of the reference numerals: 1. Shell; 2. Pre-filter; 21. First frame; 22. Metal mesh layer; 23. Foam sponge layer; 3. Main filter; 31. Second frame; 32. HEPA high-efficiency filter; 4. Fine filter; 41. Third frame; 42. Metal mesh box; 43. Polyvinylidene fluoride filter membrane; 44. Activated carbon filter block; 5. Air inlet; 6. Air outlet; 7. Temperature and humidity adjustment module; 8. Limit plate; 9. Slide; 10. Sliding block; 11. Placement door; 12. Observation window; 13. Pressure relief valve; 14. Vacuum pump; 15. Dust suppression nozzle; 16. Dust scraper; 17. Pull rope; 18. Guide wheel. DETAILED DESCRIPTION

[0026] The following is combined with Figure 1 - Attachment Fig.10 , further details of this application are given.

[0027] Embodiment 1: A multiple filtering device for filtering compressed air, comprising a housing 1, a pre-filter 2, a main filter 3 and a fine filter 4, wherein the inner cavity of the housing 1 is provided with the pre-filter 2, and the main filter 3 is provided on one side of the pre-filter 2, and the fine filter 4 is provided on the side of the main filter 3 away from the pre-filter 2, an air inlet 5 is installed on the side end surface of the housing 1, and the air inlet 5 is specifically located on the side of the pre-filter 2 away from the main filter 3, and an air outlet 6 is provided on the side of the housing 1 away from the air inlet 5, the pre-filter 2 comprises a first frame 21 and a metal mesh layer 22, and both sides of the first frame 21 are provided with metal mesh layers. The first frame 21, the second frame 31 and the third frame 41 are respectively wrapped by the metal mesh layer 22, the HEPA high-efficiency filter 32, and the HEPA high-efficiency filter 32 is arranged on both sides of the second frame 31. The fine filter 4 includes a third frame 41 and a metal mesh box 42, and polyvinylidene fluoride filter membranes 43 are arranged on both sides of the third frame 41. The inner cavity of the metal mesh box 42 is provided with an activated carbon filter block 44. The first frame 21, the second frame 31 and the third frame 41 are respectively wrapped by the metal mesh layer 22, the HEPA high-efficiency filter 32, and the polyvinylidene fluoride filter membrane 43. The air outlet 6 is connected to the temperature and humidity adjustment module 7 through the air pipe. A dust scraper 16 is arranged on one side of the first frame 21, the second frame 31 and the third frame 41, and the dust scraper 16 is slidably connected with the first frame 21, the second frame 31 and the third frame 41. Pulling ropes 17 are arranged on both sides of the two ends of the dust scraper 16, and the pulling ropes 17 are oriented to the same side around the guide wheel 18. First, compressed gas is infused into the inner cavity of the shell 1 through the air inlet 5. The pre-filter 2 is located at the front end of the whole system and is responsible for the preliminary removal of larger dust and other impurities in the air. The inside of the pre-filter 2 A metal mesh layer 22 and a foam sponge layer 23 are provided. The metal mesh layer 22 can block larger hard particles, and the foam sponge layer 23 can absorb some lightweight fiber materials to isolate impurities. The pretreated air enters the main filter 3, wherein the main filter 3 adopts a HEPA high-efficiency filter mesh 32 as the core filter material to effectively capture PM2.5-level fine particles to further obtain clean compressed gas. Finally, the air enters the fine filter 4 stage, and the activated carbon adsorption principle is used to remove residual oil mist and odor in the gas to ensure that the compressed air finally discharged meets the standard.

[0028] The first frame 21, the metal mesh layer 22 and the foam sponge layer 23 in the pre-filter 2 are arranged in several groups, the second frame 31 and the HEPA high-efficiency filter 32 in the main filter 3 are arranged in several groups, and the third frame 41 and the polyvinylidene fluoride filter membrane 43 in the fine filter 4 are arranged in two groups. The first frame 21, the metal mesh layer 22 and the foam sponge layer 23 in the pre-filter 2 and the second frame 31 and the HEPA high-efficiency filter 32 in the main filter 3 are all arranged in several groups, and the gas is filtered by using several groups of filtering mechanisms to isolate impurities and finally obtain clean gas.

[0029] Several groups of first frames 21 and several groups of second frames 31 are evenly arranged, and the metal mesh box 42 and the activated carbon filter block 44 are installed between the two groups of third frames 41 and the polyvinylidene fluoride filter membrane 43. The third frame 41 and the polyvinylidene fluoride filter membrane 43 are installed on both sides of the metal mesh box 42 and the activated carbon filter block 44, respectively, which is beneficial to limit the metal mesh box 42 and the activated carbon filter block 44 and facilitate the stable passage of gas through the activated carbon filter block 44 in the metal mesh box 42, which is beneficial to the fine filter 4 to remove oil mist and odor.

[0030] The bottom end surface and the top end surface of the inner cavity of the shell 1 are both provided with limit plates 8, and the opposite surfaces of the two groups of limit plates 8 are dug with slide grooves 9, and the upper end surfaces and the bottom end surfaces of the first frame 21, the second frame 31, the third frame 41 and the metal mesh box 42 are all provided with sliders 10, wherein the first frame 21, the second frame 31, the third frame 41 and the metal mesh box 42 are connected to the shell 1 through the sliders 10 and the slide grooves 9, which is convenient for disassembly and installation of the first frame 21, the second frame 31, the third frame 41 and the metal mesh box 42, and the metal mesh layer 22 and the foam sponge layer 23 in the pre-filter 2 are both wearing parts, so that the replacement frequency can be flexibly adjusted according to the frequency of use and on-site environmental conditions. At the same time, the HEPA high-efficiency filter 32 in the main filter 3 also belongs to the category of consumables, and the activated carbon filling amount of the fine filter 4 can also be increased or decreased to adapt to different workload requirements. The quick disassembly structure is conducive to the subsequent maintenance of the first frame 21, the second frame 31, the third frame 41 and the metal mesh box 42.

[0031] A placement door 11 is hingedly mounted on the side end face of the shell 1, and an observation window 12 is arranged on the side end face of the shell 1. A pressure relief valve 13 is connected to the bottom end face of the shell 1. An air pump 14 is arranged on one side of the temperature and humidity adjustment module 7. Dust suppression nozzles 15 are evenly arranged on the side wall of the inner cavity of the shell 1. After the gas passes through the pre-filter 2, the main filter 3 and the fine filter 4 for filtration, the gas flow rate will be reduced, which may easily lead to excessive pressure in the inner cavity of the shell 1. The air pump 14 is connected to an external air pipe to extract the gas from the inner cavity of the shell 1, thereby accelerating the gas flow rate and avoiding excessive pressure in the inner cavity of the shell 1. At the same time, the placement door 11 is used to place the first frame 21, the second frame 31, the third frame 41 and the metal mesh box 42. The observation window 12 is used to observe the filtering conditions of the first frame 21, the second frame 31, the third frame 41 and the metal mesh box 42. The pressure relief valve 13 is used to further monitor the pressure in the inner cavity of the shell 1 to ensure the normal operation and safety of the device. The dust removal nozzle 15 is connected to an external water pump through an air pipe, and the dust scraper 16 is connected to an electric roller by a pulling rope 17, and the pulling rope 17 is driven by the electric roller to move, thereby driving the dust scraper 16 to slide along the frame, and the pulling ropes 17 on both ends of the dust scraper 16 are directed to the same side through the guide wheel 18, and the pulling ropes 17 are all connected to the electric roller, or the pulling ropes 17 are manually pulled, so that the dust scraper 16 scrapes the side of the filter frame that filters dust, and at the same time starts the dust removal nozzle 15, and the dust removal nozzle 15 sprays water to reduce dust on the dust, and by timely removing impurities on the frame, thereby increasing the service life of the device, it is also beneficial to improve the filtering efficiency, wherein one side of the filter frame is cleaned manually or automatically, and the filtering speed can also be increased. Through the above structure, the dust on one side of the filter frame can be cleaned in time, which is helpful for the next filtering, and at the same time, it is also beneficial to increase the service life of the filter frame.

[0032] The outer surface of the metal mesh layer 22 is sprayed with a nano-silver coating, the first frame 21, the second frame 31 and the third frame 41 are all in the shape of grid plates, and the outer surfaces of the first frame 21, the second frame 31, the third frame 41 and the metal mesh box 42 are sprayed with a nano-silver coating, wherein the nano-silver coating has the advantages of broad-spectrum antibacterial, strong bactericidal, and long-lasting antibacterial. While filtering the gas, the nano-silver coating is used to sterilize the gas, thereby enhancing the hygienic safety of the gas flow.

[0033] The air inlet 5 forms a connecting structure with the air outlet 6 through the shell 1, the first frame 21, the second frame 31, the third frame 41 and the metal mesh box 42 form a sliding connection structure through the slider 10 and the slide groove 9 dug by the limit plate 8, and the pre-filter 2, the main filter 3 and the fine filter 4 form a connecting structure. When the untreated compressed air is sucked into the system, the pre-filter 2 is first used to remove large particles of impurities to reduce the pressure of the subsequent filter unit. Then, when the air passes through the main filter 3, the fine particles are captured by the HEPA filter paper to complete the second purification. After that, the air enters the fine filter 4. The activated carbon here can absorb residual oil mist and odor molecules to ensure that the output compressed air is absolutely clean and pollution-free. The three filter units in this device work together to form a complete and efficient air purification process.

[0034] The temperature and humidity regulating module 7 is composed of an air guide tank, a temperature and humidity sensor, a heating rod and a temperature controller, wherein the inner cavity of the air guide tank is provided with several groups of heating rods, and the temperature and humidity sensor is installed in the inner cavity of the air guide tank, and the temperature and humidity sensor and the heating rod are electrically connected to the temperature controller, the shell 1 forms a connecting structure with the input end of the air pump 14 through the air pipe, and the output end of the air pump 14 forms a connecting structure with the air guide tank in the temperature and humidity regulating module 7 through the air pipe, wherein by adding the temperature and humidity regulating module 7, the air quality parameters entering the filtration system can be dynamically adjusted according to the climate characteristics of different seasons and regions, so as to further optimize the gas purification effect.

[0035] The placement door 11 forms a rotating structure that rotates around the center of the hinge with the shell 1 through a hinge, and the contact surface between the placement door 11 and the shell 1 is provided with a sealing ring. The placement door 11 is limitedly connected to the shell 1 through bolts, and the contact surfaces of the shell 1 and the observation window 12, the pressure relief valve 13, the air pump 14 and the air pipe are all provided with sealing rings. Among them, since the placement door 11 forms a rotating structure that rotates around the center of the hinge with the shell 1 through a hinge, and the placement door 11 is limitedly connected to the shell 1 through bolts, through the above structure, it is convenient to place the first frame 21, the second frame 31, the third frame 41 and the metal mesh box 42 into the inner cavity of the shell 1 through the slider 10 and the slide groove 9. Through the above structure, the sealing of this device is guaranteed, thereby ensuring that it is conducive to filtering the gas.

[0036] The implementation principle of the embodiment of the present application is as follows: when the untreated compressed air is sucked into the system, the large particles of impurities are first removed through the pre-filter 2 to reduce the pressure of the subsequent filter unit. Then, when the air passes through the main filter 3, the fine particles are captured by the HEPA filter to complete the second purification. After that, the air enters the fine filter 4. The activated carbon here can absorb the residual oil mist and odor molecules to ensure that the output compressed air is absolutely clean and pollution-free. The three filter units work together to form a complete and efficient air purification process. The pre-filter 2 is connected to the air compressor outlet pipe to ensure that the interface is well sealed to prevent external pollutants from mixing in. The main filter 3 and the fine filter 4 are installed in sequence. Pay attention to check whether the connection between each component is firm and reliable. Turn on the power of the air compressor to allow the compressed air to flow smoothly and pass through the filtering mechanism. At the same time, regularly monitor the changes in the pressure difference before and after the filter. When the pressure difference exceeds the set value, the corresponding filter element should be cleaned or replaced in time, and the entire system should be inspected and maintained according to the time period recommended by the manufacturer, including cleaning the filter and checking the integrity of the sealing ring. Operators must wear appropriate protective equipment and comply with safety operating procedures during routine maintenance. First, compressed gas is infused into the inner cavity of the housing 1 through the air inlet 5. The pre-filter 2 is located at the front end of the entire system and is responsible for initially removing larger dust and other impurities in the air. The pre-filter 2 is provided with a metal mesh layer 22 and a foam sponge layer 23. The metal mesh layer 22 can block larger hard particles, and the foam sponge layer 23 can absorb some lightweight fiber materials, thereby isolating impurities. The pre-treated air then enters the main filter 3, which uses a HEPA high-efficiency filter 32 as the core filter material, which can effectively capture PM2.5 level fine particles, and then further obtain clean compressed gas, and finally the air enters the fine filter 4 stage, through the activated carbon adsorption principle, further removes the residual oil mist and odor in the gas, to ensure that the compressed air finally discharged meets the standard, and the easy disassembly structure is convenient for subsequent maintenance of the first frame 21, the second frame 31, the third frame 41 and the metal mesh box 42, and the metal mesh layer 22 and the foam sponge layer 23 in the pre-filter 2 are both wearing parts, so that the replacement frequency can be flexibly adjusted according to the frequency of use and on-site environmental conditions, and the HEPA high-efficiency filter 32 in the main filter 3 also belongs to the category of consumables, once it is found that the blockage is serious or the efficiency is low When the pressure drops significantly, it needs to be updated. The activated carbon filling amount of the fine filter 4 can also be increased or decreased to adapt to different workload requirements. After the gas passes through the pre-filter 2, the main filter 3 and the fine filter 4 for filtration, the gas flow rate will be reduced, which may easily lead to excessive pressure in the inner cavity of the shell 1. The gas in the inner cavity of the shell 1 is extracted by the vacuum pump 14, thereby accelerating the gas flow rate and avoiding excessive pressure in the inner cavity of the shell 1. At the same time, the door 11 can be used to place the first frame 21, the second frame 31, the third frame 41 and the metal mesh box 42, and the first frame 21, the second frame 31, the third frame 41 and the metal mesh box 4 can be easily observed through the observation window 12. 2 filtration, and further monitor the pressure in the inner cavity of the housing 1 through the pressure relief valve 13, so as to ensure the normal operation of the device and the safety of the operation of the device. The nano silver coating has the advantages of strong sterilization and long-lasting antibacterial. While filtering the gas, the nano silver coating sterilizes and sterilizes the gas. The temperature and humidity adjustment module 7 is added to dynamically adjust the air quality parameters entering the filtration system according to the climate characteristics of different seasons and regions, so as to further optimize the gas purification effect. The dust reduction nozzle 15 is connected to the external water pump through the air pipe, and the dust scraper 16 is connected to the electric roller by the pull rope 17, and the pull rope 1 is driven by the electric roller. 7 moves, thereby driving the dust scraper 16 to slide along the frame, and the pulling ropes 17 on both ends of the dust scraper 16 are directed to the same side through the guide wheel 18, and the pulling ropes 17 are connected to the electric roller, or the pulling ropes 17 are manually pulled, so that the dust scraper 16 scrapes the side of the filter frame that filters dust, and at the same time starts the dust reduction nozzle 15, the dust reduction nozzle 15 sprays water to reduce dust, and removes impurities on the frame in time, which increases the use time of this device and is conducive to improving the filtering efficiency. By manually or automatically cleaning one side of the filter frame, the filtering speed can also be increased, which is helpful for the next filtering and is also conducive to increasing the service life of the filter frame. .

[0037] The embodiments of this specific implementation are all preferred embodiments of the present application, and are not intended to limit the protection scope of the present application. The same components are represented by the same figure marks. Therefore, any equivalent changes made based on the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A multiple filter device for filtering compressed air, comprising a housing (1), a pre-filter (2), a main filter (3) and a fine filter (4), characterized in that: The inner cavity of the housing (1) is provided with a pre-filter (2), and a main filter (3) is provided on one side of the pre-filter (2); a fine filter (4) is provided on the side of the main filter (3) away from the pre-filter (2); an air inlet (5) is installed on the side end surface of the housing (1), and the air inlet (5) is specifically located on the side of the pre-filter (2) away from the main filter (3); an air outlet (6) is provided on the side of the housing (1) away from the air inlet (5); the pre-filter (2) comprises a first frame (21) and a metal mesh layer (22); metal mesh layers (22) are provided on both sides of the first frame (21), and a foam sponge layer (23) is provided between two groups of the metal mesh layers (22); the main filter (3) comprises a second frame (31) and a HEPA high-efficiency filter (32); HEPA high-efficiency filter (32) is provided on both sides of the second frame (31); the fine filter (4) is provided on the side end surface of the housing (1); (4) comprises a third frame (41) and a metal mesh box (42), both sides of the third frame (41) are provided with polyvinylidene fluoride filter membranes (43), the inner cavity of the metal mesh box (42) is provided with an activated carbon filter block (44), the first frame (21), the second frame (31) and the third frame (41) are respectively wrapped by a metal mesh layer (22), a HEPA high-efficiency filter mesh (32) and a polyvinylidene fluoride filter membrane (43), the air outlet (6) is connected to a temperature and humidity adjustment module (7) through an air pipe, one side of the first frame (21), the second frame (31) and the third frame (41) are provided with a dust scraper (16), and the dust scraper (16) is slidably connected to the first frame (21), the second frame (31) and the third frame (41), and both sides of the two ends of the dust scraper (16) are provided with pull ropes (17), and the pull ropes (17) surround the guide wheel (18) and face the same side.

2. A multiple filter device for filtering compressed air according to claim 1, characterized in that: The first frame (21), the metal mesh layer (22) and the foam sponge layer (23) in the pre-filter (2) are arranged in a plurality of groups, the second frame (31) and the HEPA high-efficiency filter (32) in the main filter (3) are arranged in a plurality of groups, and the third frame (41) and the polyvinylidene fluoride filter membrane (43) in the fine filter (4) are arranged in two groups.

3. A multiple filter device for filtering compressed air according to claim 1, characterized in that: A plurality of groups of the first frames (21) and a plurality of groups of the second frames (31) are evenly arranged, and the metal mesh box (42) and the activated carbon filter block (44) are installed between two groups of the third frames (41) and the polyvinylidene fluoride filter membrane (43).

4. A multiple filter device for filtering compressed air according to claim 1, characterized in that: The bottom end surface and the top end surface of the inner cavity of the shell (1) are both provided with limit plates (8), and the opposite surfaces of the two sets of limit plates (8) are provided with sliding grooves (9), and the upper end surfaces and the bottom end surfaces of the first frame (21), the second frame (31), the third frame (41) and the metal mesh box (42) are all provided with sliding blocks (10).

5. A multiple filter device for filtering compressed air according to claim 1, characterized in that: A placement door (11) is installed on the side end surface of the shell (1) via a hinge, and an observation window (12) is provided on the side end surface of the shell (1); a pressure relief valve (13) is connected to the bottom end surface of the shell (1); an air pump (14) is provided on one side of the temperature and humidity adjustment module (7); and dust suppression nozzles (15) are evenly arranged on the side wall of the inner cavity of the shell (1).

6. A multiple filter device for filtering compressed air according to claim 1, characterized in that: The outer surface of the metal mesh layer (22) is sprayed with a nano-silver coating, the first frame (21), the second frame (31) and the third frame (41) are all in the shape of grid plates, and the outer surfaces of the first frame (21), the second frame (31), the third frame (41) and the metal mesh box (42) are sprayed with a nano-silver coating.

7. A multiple filter device for filtering compressed air according to claim 4, characterized in that: The air inlet (5) forms a communication structure with the air outlet (6) through the housing (1); the first frame (21), the second frame (31), the third frame (41) and the metal mesh box (42) form a sliding connection structure through a slide groove (9) dug by a slider (10) and a limit plate (8); and the pre-filter (2), the main filter (3) and the fine filter (4) form a communication structure.

8. A multiple filter device for filtering compressed air according to claim 5, characterized in that: The temperature and humidity regulating module (7) is composed of an air guide tank, a temperature and humidity sensor, a heating rod and a temperature controller, wherein the inner cavity of the air guide tank is provided with a plurality of groups of heating rods, and the temperature and humidity sensor is installed in the inner cavity of the air guide tank, and the temperature and humidity sensor and the heating rod are electrically connected to the temperature controller, the housing (1) forms a communication structure with the input end of the air extraction pump (14) through an air pipe, and the output end of the air extraction pump (14) forms a communication structure with the air guide tank in the temperature and humidity regulating module (7) through the air pipe.

9. A multiple filter device for filtering compressed air according to claim 5, characterized in that: The placement door (11) is hinged with the shell (1) to form a rotating structure that rotates around the hinge center. The contact surfaces between the placement door (11) and the shell (1) are provided with sealing rings. The placement door (11) is limitedly connected to the shell (1) by bolts. The contact surfaces between the shell (1) and the observation window (12), the pressure relief valve (13), the air pump (14) and the air pipe are all provided with sealing rings.

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