Air purification equipment for leather production

Abstract

The invention discloses leather production air purification equipment, and belongs to the technical field of air purification, the leather production air purification equipment comprises a purification bin, a plurality of filtering assemblies for filtering air are arranged in the purification bin, each filtering assembly comprises a first filtering plate and a second filtering plate, and the multiple filtering assemblies are distributed in an up-and-down stacking mode; a discharging opening is formed in the position, corresponding to the filtering assembly on the lowermost side, of the outer wall of the purification bin, and a pushing assembly is arranged at the position, corresponding to the filtering assembly on the lowermost side, of the purification bin. When the air purifying device is used, the filtering assembly on the upper layer descends under the action of gravity, and then the new filtering net enters the purifying bin and is located on the uppermost side, so that it can be guaranteed that the filtering net on the uppermost side is always kept in an effective filtering state, and the air purifying effect of the purifying device can be effectively guaranteed.

Description

Technical Field

[0001] The present invention relates to the technical field of air purification, and more specifically, to an air purification device for leather production. Background Art

[0002] Air purification is an important part of the environmental protection field, and its main purpose is to reduce the pollution of the environment by harmful gases generated during industrial production.

[0003] Among them, when purifying the air during the leather production process, it is necessary to use a purification device to filter the air, so as to reduce the solid substances in the air and prevent the solid substances from entering the air and polluting the air. The use of the purification device can effectively reduce the pollution of the air to the atmosphere.

[0004] When the purification device filters the air, multiple filter meshes are required to filter the air, so as to enhance the filtering effect. However, during this process, the filter mesh near the air inlet will fail first because it filters the air for the first time. Therefore, the filter mesh near the air inlet will be replaced frequently, while the filter mesh far from the air inlet will be used for a longer time and has a lower replacement frequency. When the filter mesh far from the air inlet is not replaced in time, its filtering effect will decline. When replacing the filter mesh near the air inlet, it cannot always ensure that the filter mesh far from the air inlet remains in an effective filtering state, which will cause some air to enter the atmosphere with a large amount of solid substances due to poor filtering effect, polluting the atmosphere and resulting in poor purification effect. Summary of the Invention

[0005] Aiming at the problems existing in the prior art, the purpose of the present invention is to provide an air purification device for leather production.

[0006] To solve the above problems, the present invention adopts the following technical solutions.

[0007] An air purification device for leather production includes a purification chamber. A plurality of filtering components for filtering air are arranged inside the purification chamber. The filtering components include a first filter plate and a second filter plate, and the plurality of filtering components are stacked vertically; A discharge port is provided at a position on the outer wall of the purification chamber corresponding to the lowermost filtering component, and the size of the discharge port is adapted to the size of the filtering component; A pushing component is provided at a position on the purification chamber corresponding to the lowermost filtering component. The pushing component pushes the filtering component to push the filtering component out of the discharge port; A feed inlet is provided at a position on the outer wall of the purification chamber corresponding to the uppermost filtering component. A storage box is provided at a position outside the purification chamber corresponding to the feed inlet. A first magnet is embedded at one end of the second filter plate corresponding to the storage box, and a second magnet that repels the first magnet is embedded at one end of the storage box interior opposite to the feed inlet.

[0008] Furthermore, the first filter plate and the second filter plate are slidably connected. Both the first filter plate and the second filter plate are in an "L" shape. After the first filter plate and the second filter plate are combined, they form an "n" shape. The first filter plate and the second filter plate are slidably connected, and a plurality of compression springs are provided at the connection between the first filter plate and the second filter plate.

[0009] Furthermore, the pushing component includes a motor installed on the purification chamber. A rotating rod is fixedly installed at the output end of the motor. The rotating rod is located inside the purification chamber. A spiral blade is fixedly installed on the outer wall of the rotating rod. The spiral blade squeezes the vertical part on the lower side of the second filter plate.

[0010] Furthermore, a movable groove is provided at the lower side inside the purification chamber. A telescopic block is slidably installed inside the movable groove. A plurality of ejecting springs are fixedly installed at the lower end of the telescopic block. A switch is fixedly installed at the upper end inside the movable groove. The upper ends of the first filter plate and the second filter plate squeeze the upper end of the telescopic block.

[0011] Furthermore, a recorder is fixedly installed at the lower end inside the movable groove, and the lower end of the telescopic block is in pressing contact with the recorder.

[0012] Furthermore, a collection box for collecting the filtering component is installed at a position on the outer wall of the purification chamber corresponding to the discharge port. A top plate is slidably installed at the lower side inside the storage box. A support spring is fixedly installed at the lower end of the top plate. The support spring squeezes the top plate.

[0013] Furthermore, a plurality of air inlets are provided at the lower side of the purification chamber, and a plurality of air outlets are provided at the upper side of the purification chamber. A gas storage cover is fixedly installed at the upper end of the purification chamber. Three connecting pipes are connected to the upper end of the gas storage cover. Two secondary filtration chambers are also provided outside the purification chamber. Solutions for neutralizing acidic gas and alkaline gas are respectively contained in the two secondary filtration chambers. Two of the connecting pipes are respectively connected to the lower sides inside the two secondary filtration chambers, and the other connecting pipe is connected to the inside of the discharge airway. Electronic valves are installed inside all three connecting pipes.

[0014] Further, a pH detector is installed inside the air storage hood. The pH detector detects the acidity and alkalinity of the air inside the air storage hood. An analysis module and a control module are also installed outside the purification chamber. An alarm is installed outside the storage box. The switch transmits the received signal to the control module, and the control module controls the motor to rotate until the filter assembly slides out of the discharge port into the collection box.

[0015] Further, each time the recorder is squeezed by the telescopic block, it counts once and sends the recorded data to the analysis module. The analysis module uses the following formula to count the number of filter assemblies that slide out of the discharge port: ; where Q is the number of filter assemblies that slide out of the discharge port, and M is the number of times recorded by the recorder; Then, the following formula is used to compare the number of filter assemblies that slide out of the discharge port with the maximum storage quantity in the storage box: ; where N is the maximum storage quantity in the storage box. When P equals 1, the analysis module sends a signal to the control module, and at this time, the control module controls the alarm to give an alarm. When P is not equal to 1, the control module does not control the alarm to give an alarm.

[0016] Further, the pH detector transmits the detected acidity and alkalinity data to the analysis module. The analysis module classifies the received acidity and alkalinity signals through a decision tree model. When the air is acidic, the analysis module sends a signal to the control module, and the control module controls one of the electronic valves to open, so that the connecting pipe communicating with the secondary filtration chamber filled with the neutralizing acidic solution is opened. When the air is alkaline, the analysis module sends a signal to the control module, and the control module controls the electronic valve in another connecting pipe communicating with the inside of the secondary filtration chamber to open. When the air is neutral, the control module controls the electronic valve in the connecting pipe communicating with the discharge airway to open. When the control module controls one of the electronic valves to open, the other electronic valves are closed.

[0017] Compared with the prior art, the beneficial effects of the present invention are as follows: 1. The multiple filter assemblies provided by the present invention can effectively filter the air. Moreover, when the filter assembly at the bottom layer is taken out, the upper filter assembly will descend under the action of gravity. Then, a new filter screen will enter the purification chamber and be located at the uppermost side, so as to ensure that the filter screen at the uppermost side always remains in an effective filtering state, and effectively ensure the air purification effect of the purification equipment.

[0018] 2. Acidic and alkaline air is generated during the leather production process, and this device can reasonably introduce the air into different secondary filtration bins for secondary treatment according to the air with different characteristics. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the overall structure of the present invention; Figure 2 It is a schematic diagram of the internal structure of the purification bin of the present invention; Figure 3 It is a schematic diagram of the partial structure of the rotating rod and the spiral blade of the present invention; Figure 4 It is a schematic diagram of the partial structure of the compression spring of the present invention; Figure 5 It is a schematic diagram of the partial structure of the second magnet of the present invention; Figure 6 It is a schematic diagram of the partial structure of the air inlet and the air outlet of the present invention; Figure 7 It is a schematic diagram of the partial structure of the switch of the present invention; Figure 8 It is a schematic diagram of the partial structure of the electronic valve of the present invention; Figure 9 It is a schematic diagram of the system framework of the present invention.

[0020] Explanation of the reference numerals in the drawings: 1. Purification bin; 101. Discharge port; 102. Collection box; 103. Feed port; 104. Storage box; 105. Second magnet; 106. Top plate; 107. Support spring; 108. Air inlet; 109. Air outlet; 110. Air storage hood; 111. Connecting pipe; 112. Secondary filtration bin; 113. Electronic valve; 114. Acid-base detector; 115. Data analysis module; 116. Control module; 117. Alarm; 2. Filtration assembly; 201. First filter plate; 202. Second filter plate; 203. First magnet; 204. Compression spring; 3. Pushing assembly; 301. Motor; 302. Rotating rod; 303. Spiral blade; 4. Activity slot; 401. Telescopic block; 402. Ejecting spring; 403. Switch; 404. Recorder. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0021] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the drawings in the embodiments of the present invention; obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0022] Please refer to Figures 1 to 9 Figures 1 to 9 , an air purification device for leather production, comprising a purification bin 1, inside which there are multiple filter components 2 for filtering air. The filter component 2 includes a first filter plate 201 and a second filter plate 202, and the multiple filter components 2 are distributed in a stacked manner up and down; At the position on the outer wall of the purification bin 1 corresponding to the lowermost filter component 2, a discharge port 101 is opened, and the size of the discharge port 101 is adapted to the size of the filter component 2; At the position on the purification bin 1 corresponding to the lowermost filter component 2, a pushing component 3 is provided. The pushing component 3 pushes the filter component 2 and pushes the filter component 2 out of the discharge port 101; At the position on the outer wall of the purification bin 1 corresponding to the uppermost filter component 2, a feed port 103 is opened. At the position outside the purification bin 1 corresponding to the feed port 103, a storage box 104 is provided. One end of the second filter plate 202 corresponding to the storage box 104 is embedded with a first magnet 203, and one end of the storage box 104 opposite to the feed port 103 is embedded with a second magnet 105 that repels the first magnet 203; The first filter plate 201 is slidably connected to the second filter plate 202, and both the first filter plate 201 and the second filter plate 202 are of an "L" - shaped structure. After the first filter plate 201 and the second filter plate 202 are combined, they form an "n" - shaped structure. The first filter plate 201 is slidably connected to the second filter plate 202, and a plurality of compression springs 204 are provided at the connection between the first filter plate 201 and the second filter plate 202; The pushing component 3 includes a motor 301 installed on the purification bin 1. The output end of the motor 301 is fixedly installed with a rotating rod 302. The rotating rod 302 is located inside the purification bin 1, and a spiral blade 303 is fixedly installed on the outer wall of the rotating rod 302. The spiral blade 303 squeezes the vertical part below the second filter plate 202; An activity groove 4 is opened at the lower side inside the purification bin 1. An expansion block 401 is slidably installed inside the activity groove 4. A plurality of ejecting springs 402 are fixedly installed at the lower end of the expansion block 401. A switch 403 is fixedly installed at the upper end inside the activity groove 4. The lower ends of the first filter plate 201 and the second filter plate 202 squeeze the upper end of the expansion block 401.

[0023] By adopting the above technical solution, after the air to be filtered is introduced from the lower side of the purification device, the air can flow upward. At this time, it can pass through multiple first filter plates 201 and second filter plates 202. The first filter plates 201 and the second filter plates 202 can block solid substances in the air. When the first filter plates 201 and the second filter plates 202 at the lowermost side are blocked by the filtered impurities, the air permeability of the first filter plates 201 and the second filter plates 202 will become poor. At this time, after the air enters the purification chamber 1, it can lift the first filter plates 201 and the second filter plates 202. At this time, when the pressure of the first filter plates 201 and the second filter plates 202 on the expansion blocks 401 decreases, at this time, under the action of the ejecting springs 402, the expansion blocks 401 can rise and squeeze the switches 403. At this time, the switches 403 can control the motor 301 to work through the control module 116. When the motor 301 works, it can drive the rotating rod 302 to rotate. The rotation of the rotating rod 302 can drive the spiral blades 303 outside it to rotate. When the spiral spiral blades 303 rotate, they can squeeze the vertical part below the second filter plate 202. Under the action of the squeezing force, the second filter plate 202 moves relative to the first filter plate 201. At this time, the second filter plate 202 can cooperate with the first filter plate 201 to squeeze the compression spring 204, so that the length of the filter assembly 2 shrinks. When a gap is generated between the second filter plate 202 and the purification chamber 1, the air can flow upward through the gap between the second filter plate 202 and the purification chamber 1. At this time, the squeezing force of the air on the first filter plates 201 and the second filter plates 202 decreases. At this time, under the action of gravity, the first filter plates 201 and the second filter plates 202 can descend. After the descending first filter plate 201 is aligned with the discharge port 101, at this time, under the push of the spiral blade 303, the first filter plates 201 and the second filter plates 202 can slide out from the discharge port 101. When the first filter plates 201 and the second filter plates 202 at the lowermost side slide out, under the action of the ejecting spring 402, the expansion blocks 401 will rise again, so as to touch the switch 403 again, causing the motor 301 to stop working. When the first filter plates 201 and the second filter plates 202 slide out from the discharge port 101, the other filter plates located inside the purification chamber 1 can descend under the action of gravity and squeeze the expansion blocks 401 again, so that the expansion blocks 401 descend to the lowermost end.

[0024] A recorder 404 is fixedly installed at the lower end inside the movable groove 4, and the lower end of the expansion block 401 is in pressing contact with the recorder 404.

[0025] By adopting the above technical solution, when the expansion block 401 descends, it can squeeze the recorder 404. Each time the first filter plates 201 and the second filter plates 202 are pushed out, the expansion block 401 will contact the recorder 404 twice.

[0026] A collection box 102 for collecting the filter assembly 2 is installed at a position on the outer wall of the purification chamber 1 corresponding to the discharge port 101. A top plate 106 is slidably installed on the lower side inside the storage box 104. A support spring 107 is fixedly installed at the lower end of the top plate 106, and the support spring 107 squeezes the top plate 106.

[0027] By adopting the above technical solution, after the lowermost first filter plate 201 and second filter plate 202 slide out from the discharge port 101, and the remaining first filter plate 201 and second filter plate 202 in the purification chamber 1 descend, the first filter plate 201 and second filter plate 202 located at the uppermost side will no longer block the feed port 103. At this time, under the action of the first magnet 203 and the second magnet 105, the first filter plate 201 and second filter plate 202 located at the uppermost side in the storage box 104 will enter the purification chamber 1 through the feed port 103 and be located at the uppermost side in the purification chamber 1. At this time, the top plate 106 will squeeze the remaining first filter plate 201 and second filter plate 202 in the storage box 104 under the action of the support spring 107, so that the remaining first filter plate 201 and second filter plate 202 rise to a position corresponding to the feed port 103, and the support spring 107 always squeezes the top plate 106.

[0028] A plurality of air inlets 108 are provided on the lower side of the purification chamber 1, a plurality of air outlets 109 are provided on the upper side of the purification chamber 1, and an air storage hood 110 is fixedly installed at the upper end of the purification chamber 1. Three connecting pipes 111 are communicated with the upper end of the air storage hood 110. Two secondary filtration chambers 112 are further provided outside the purification chamber 1. Solutions for neutralizing acidic gas and alkaline gas are respectively contained in the two secondary filtration chambers 112. Two of the connecting pipes 111 are respectively communicated with the lower sides inside the two secondary filtration chambers 112, and the other connecting pipe 111 is communicated with the inside of the discharge airway. Electronic valves 113 are installed inside all three connecting pipes 111; An acid-base detector 114 is installed inside the air storage hood 110 to detect the acidity and alkalinity of the air inside the air storage hood 110. A data analysis module 115 and a control module 116 are further installed outside the purification chamber 1. An alarm 117 is installed outside the storage box 104. The switch 403 transmits the received signal to the control module 116, and the control module 116 controls the motor 301 to rotate until the filter assembly 2 slides out from the discharge port 101 into the collection box 102; The recorder 404 makes a count each time it is squeezed by the expansion block 401 and sends the recorded data to the data analysis module 115. The data analysis module 115 statistically analyzes the number of filter assemblies 2 sliding out from the discharge port 101 through the following formula: ; Wherein, Q is the number of the filter components 2 sliding out from the discharge port 101, and M is the number of times recorded by the recorder 404; Then, compare the number of the filter components 2 sliding out from the discharge port 101 with the maximum storage quantity in the storage box 104 through the following formula: ; Wherein, N is the maximum storage quantity in the storage box 104. When P is equal to 1, the data analysis module 115 sends a signal to the control module 116, and at this time, the control module 116 controls the alarm 117 to give an alarm. When P is not equal to 1, the control module 116 does not make the alarm 117 give an alarm. When there is only one filter component 2 left inside the storage box 104, the alarm 117 gives an alarm to remind the staff to add the filter components 2 to the storage box 104 in time to avoid untimely replenishment of the filter components 2; The acid-base detector 114 transmits the detected acid-base data to the data analysis module 115. The data analysis module 115 classifies the received acid-base signals through a decision tree model. When the air is acidic, the data analysis module 115 sends a signal to the control module 116, and the control module 116 controls one of the electronic valves 113 to open, so that the connecting pipe 111 communicating with the secondary filtration chamber 112 filled with the acid-neutralizing solution is opened. When the air is alkaline, the data analysis module 115 sends a signal to the control module 116, and the control module 116 controls the electronic valve 113 in another connecting pipe 111 communicating with the inside of the secondary filtration chamber 112 to open. When the air is neutral, the control module 116 controls the electronic valve 113 in the connecting pipe 111 communicating with the discharge airway to open. When the control module 116 controls one of the electronic valves 113 to open, the other electronic valves 113 are closed, and only one of the three electronic valves 113 can be in the open state at the same time.

[0029] When the air enters the purification chamber 1 through the air inlet 108 and passes through the filter components 2, the air enters the air storage cover 110. At this time, the acid-base detector 114 can detect the acid-base property of the air. When it detects that the air is acidic, one of the electronic valves 113 is opened, so that one of the connecting pipes 111 is opened, and the air is introduced into one of the secondary filtration chambers 112. The acid substances in the air are neutralized by the solution in the secondary filtration chamber 112, so as to absorb the acid substances in the air. Similarly, when it detects that the air is alkaline, the other valves are closed and the electronic valve 113 in another connecting pipe 111 communicating with the secondary filtration chamber 112 is opened, so that the air is introduced into another secondary filtration chamber 112. The alkaline substances in the air are neutralized and absorbed by the solution in the secondary filtration chamber 112. When the air is neutral, the electronic valve 113 in the connecting pipe 111 communicating with the airway is opened, so that the air is directly discharged.

[0030] The above is only a preferred specific embodiment of the present invention; however, the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention, according to the technical solution and its improved concept of the present invention, makes equivalent substitutions or changes, and should be covered by the protection scope of the present invention.

Claims

1. A leather production air purification device, comprising a purification chamber (1), characterized in that: A plurality of filter assemblies (2) for filtering air are arranged inside the purification chamber (1), the filter assemblies (2) comprising a first filter plate (201) and a second filter plate (202), and the plurality of filter assemblies (2) are stacked up and down; A discharge port (101) is provided at a position on the outer wall of the purification bin (1) corresponding to the bottommost filter assembly (2), and the size of the discharge port (101) is adapted to the size of the filter assembly (2); A pushing component (3) is provided at a position of the purification bin (1) corresponding to the bottommost filter component (2), wherein the pushing component (3) pushes the filter component (2) to push the filter component (2) out of the discharge port (101); A feed port (103) is provided on the outer wall of the purification bin (1) at a position corresponding to the uppermost filter assembly (2); a storage box (104) is provided on the outside of the purification bin (1) at a position corresponding to the feed port (103); a first magnet (203) is embedded in one end of the second filter plate (202) corresponding to the storage box (104); and a second magnet (105) that repels the first magnet (203) is embedded in one end of the storage box (104) opposite to the feed port (103).

2. The air purification equipment for leather production according to claim 1, characterized in that: The first filter plate (201) is slidably connected to the second filter plate (202), and both the first filter plate (201) and the second filter plate (202) are of "L"-shaped structure. The first filter plate (201) and the second filter plate (202) are combined to form an "n"-shaped structure. The first filter plate (201) and the second filter plate (202) are slidably connected, and a plurality of compression springs (204) are provided at the connection between the first filter plate (201) and the second filter plate (202).

3. The air purification equipment for leather production according to claim 2, characterized in that: The pushing assembly (3) comprises a motor (301) mounted on the purification chamber (1); a rotating rod (302) is fixedly mounted on the output end of the motor (301); the rotating rod (302) is located inside the purification chamber (1); a spiral blade (303) is fixedly mounted on the outer wall of the rotating rod (302); the spiral blade (303) presses the lower vertical portion of the second filter plate (202).

4. The air purification equipment for leather production according to claim 3, characterized in that: A movable groove (4) is provided at the lower side of the interior of the purification chamber (1), a telescopic block (401) is slidably mounted inside the movable groove (4), a plurality of ejection springs (402) are fixedly mounted at the lower end of the telescopic block (401), a switch (403) is fixedly mounted at the upper end of the interior of the movable groove (4), and the lower ends of the first filter plate (201) and the second filter plate (202) press the upper end of the telescopic block (401).

5. The air purification equipment for leather production according to claim 4, characterized in that: A recorder (404) is fixedly mounted at the lower end of the movable groove (4), and the lower end of the telescopic block (401) is in compression contact with the recorder (404).

6. The air purification equipment for leather production according to claim 5, characterized in that: A collecting box (102) for collecting the filter assembly (2) is installed at a position on the outer wall of the purification bin (1) corresponding to the discharge port (101), a top plate (106) is slidably installed on the lower side of the interior of the storage box (104), a supporting spring (107) is fixedly installed at the lower end of the top plate (106), and the supporting spring (107) presses the top plate (106).

7. The air purification equipment for leather production according to claim 6, characterized in that: The purification chamber (1) is provided with a plurality of air inlets (108) on the lower side, and a plurality of air outlets (109) on the upper side. A gas storage cover (110) is fixedly mounted on the upper end of the purification chamber (1). The upper end of the gas storage cover (110) is connected to three connecting pipes (111). Two secondary filter chambers (112) are further provided outside the purification chamber (1). Solutions for neutralizing acidic gas and alkaline gas are respectively contained inside the two secondary filter chambers (112). Two connecting pipes (111) are respectively connected to the lower sides of the interiors of the two secondary filter chambers (112), and another connecting pipe (111) is connected to the interior of the exhaust airway. Electronic valves (113) are installed inside the three connecting pipes (111).

8. The air purification equipment for leather production according to claim 7, characterized in that: The air storage hood (110) is internally installed with an acidity and alkalinity detector (114), and the acidity and alkalinity detector (114) detects the acidity and alkalinity of the air in the air storage hood (110). The purification chamber (1) is also externally installed with a data analysis module (115) and a control module (116). The storage box (104) is externally installed with an alarm (117). The switch (403) transmits the received signal to the control module (116), and the control module (116) controls the motor (301) to rotate until the filter assembly (2) slides out of the discharge port (101) into the collection box (102).

9. The air purification equipment for leather production according to claim 8, characterized in that: The recorder (404) counts each time it is squeezed by the telescopic block (401) and sends the recorded data to the data analysis module (115). The data analysis module (115) counts the number of filter components (2) that slide out of the discharge port (101) using the following formula: ； Wherein, Q is the number of filter components (2) sliding out from the discharge port (101), and M is the number of times recorded by the recorder (404); The number of filter assemblies (2) that slide out of the discharge port (101) is then compared with the maximum storage quantity in the storage box (104) using the following formula: ； Wherein, N is the maximum storage quantity in the storage box (104); when P is equal to 1, the data analysis module (115) sends a signal to the control module (116); at this time, the control module (116) controls the alarm (117) to sound an alarm; when P is not equal to 1, the control module (116) does not control the alarm (117) to sound an alarm.

10. The air purification equipment for leather production according to claim 9, characterized in that: The acid-base detector (114) transmits the detected acid-base data to the data analysis module (115), and the data analysis module (115) classifies the received acid-base signals through a decision tree model. When the air is acidic, the data analysis module (115) sends a signal to the control module (116), and the control module (116) controls one of the electronic valves (113) to open, so that the connecting pipe (111) connected to the secondary filtration chamber (112) containing the neutralizing acid solution is opened. When the air is acidic, the data analysis module (115) sends a signal to the control module (116), and the control module (116) controls one of the electronic valves (113) to open, so that the connecting pipe (111) connected to the secondary filtration chamber (112) containing the neutralizing acid solution is opened. When the air is alkaline, the data analysis module (115) sends a signal to the control module (116), and the control module (116) controls another electronic valve (113) in the connecting pipe (111) connected to the secondary filtration chamber (112) to open. When the air is neutral, the control module (116) controls the electronic valve (113) in the connecting pipe (111) connected to the exhaust airway to open. When the control module (116) controls one of the electronic valves (113) to open, the other electronic valves (113) are closed.

Images