A low-temperature plasma deodorization device

Abstract

This invention belongs to the field of low-temperature plasma deodorization technology, specifically a low-temperature plasma deodorization device, comprising: a housing, wherein the housing is used for low-temperature plasma deodorization of waste gas; a partition plate, which is fixedly connected to the top of the housing and provides support; a heating plate, wherein multiple heating plates are fixedly connected to the bottom of the partition plate and regulate the heating temperature inside the housing; and a rotating cylinder, which is rotatably connected to the inside of the housing. This invention is simple to operate, safe and stable, and achieves non-stop deodorization of external waste gas, improving deodorization efficiency and effect, meeting actual deodorization needs. Furthermore, it can adjust the workload of the discharge section according to the waste gas concentration to achieve uniform and efficient deodorization of the waste gas. It is highly adaptable and controllable, meeting actual processing requirements. During the deodorization process, it can also adaptively clear blockages in the filter screen with airflow, ensuring continuous and stable flow of external waste gas. It is durable and highly safe.

Description

Technical Field

[0001] This invention belongs to the field of low-temperature plasma deodorization technology, specifically a low-temperature plasma deodorization device. Background Technology

[0002] Low-temperature plasma deodorization devices are air deodorization equipment that uses low-temperature plasma technology to treat waste gas. They are mainly used in industrial waste gas treatment and indoor air purification. They decompose pollutants by generating active particles through ionization of gas. The core treatment process includes gas collection, low-temperature plasma purification, adsorption catalysis, and intelligent control.

[0003] Chinese patent application 202010270290.7 discloses a low-temperature plasma deodorization system, including a housing, several deodorization modules arranged in an array inside the housing, a power distribution module disposed outside the housing, and an ozone decomposition module disposed at the tail of the housing; each of the several deodorization modules includes a low-temperature plasma reactor in the form of dielectric barrier discharge; the low-temperature plasma deodorization efficiency is low and the low-temperature plasma deodorization effect is poor.

[0004] Chinese patent application 202010236863.4 describes a deodorizing device using low-temperature plasma, comprising: a first low-temperature plasma generating unit installed on a portion of a chamber through which malodorous gas passes, for generating low-temperature plasma; and a power supply unit for applying power to the first low-temperature plasma generating unit, the first low-temperature plasma generating unit comprising: a plurality of flexible first electrodes; this low-temperature plasma deodorizing device is difficult to operate and has low operational precision.

[0005] When the aforementioned low-temperature plasma deodorization device deodorizes waste gas, the water vapor in the waste gas can easily cause impurities to adhere to the outer surface of the discharge structure, thereby reducing the discharge efficiency of the discharge structure. Furthermore, existing technologies often require shutdown to clean the discharge structure, which further reduces the deodorization efficiency and effect.

[0006] Meanwhile, when the concentration in the exhaust gas increases, if the low-temperature plasma deodorization efficiency of the discharge structure cannot be adjusted accordingly, the exhaust gas cannot be completely and effectively deodorized, and it will also pollute the subsequent activated carbon structure and reduce the exhaust gas flow efficiency.

[0007] Furthermore, even after the exhaust gas undergoes a low-temperature plasma deodorization process through the discharge structure, an odor still remains, requiring recirculation treatment. However, the recirculation flow rate of the exhaust gas cannot be adjusted during the recirculation process, and the intake volume of external exhaust gas cannot be adjusted accordingly. Consequently, the exhaust gas cannot be thoroughly and effectively deodorized and discharged, reducing the deodorization efficiency and effect of the exhaust gas.

[0008] However, with prolonged use, the pre-filter structure is prone to clogging with a large number of impurities, which affects the efficiency and volume of subsequent exhaust gas flow, and ultimately affects the overall deodorization effect of the exhaust gas. Summary of the Invention

[0009] To address the above problems, the present invention provides a low-temperature plasma deodorization device.

[0010] To achieve the above objectives, the present invention provides the following technical solution: a low-temperature plasma deodorization device, comprising:

[0011] The enclosure contains a low-temperature plasma deodorization system for exhaust gases.

[0012] A partition plate, which is fixedly connected to the top of the box and supports the partition;

[0013] Heating plates, multiple heating plates are fixedly connected to the bottom of the partition plate and adjust the heating temperature inside the box;

[0014] A rotating cylinder, which is rotatably connected to the inside of the housing;

[0015] The discharge section, wherein multiple discharge sections are fixedly connected to the outer surface of the rotating cylinder and emit low-temperature plasma, and the rotation of the rotating cylinder drives the discharge section to rotate;

[0016] A cleaning box, which is movably connected inside the box body and cleans the end of the discharge part below the outer surface of the rotating cylinder;

[0017] The multiple return pipes will recirculate the exhaust gas after low-temperature plasma deodorization for repeated treatment.

[0018] A filter screen, which is fixedly connected inside the housing and pre-filters the exhaust gas;

[0019] A movable plate is movably connected to the side of the filter screen near the rotating cylinder. The movable plate moves up and down to adjust the amount of exhaust gas entering the filter.

[0020] This application is simple to operate, safe and stable, and can achieve non-stop deodorization of external waste gas, improve deodorization efficiency and effect, meet actual deodorization needs, and can also adjust the workload of the discharge unit according to the concentration of waste gas to achieve uniform and efficient deodorization of waste gas. It has strong adaptability and good controllability to meet actual processing needs. In addition, it can also perform adaptive wind-powered cleaning of the filter screen during the deodorization process to ensure that the external waste gas can flow continuously and stably. It is durable and safe.

[0021] Preferably, it further includes:

[0022] A drive shaft is fixedly connected to the central shaft of the rotating cylinder and drives the rotating cylinder to rotate.

[0023] A drive motor, the output end of which is fixedly connected to the end of the transmission shaft;

[0024] The bearing housing has its inner wall rotatably connected to the outer surface of the drive shaft. When the drive motor is started, it drives the drive shaft to rotate inside the bearing housing, and the drive shaft drives the rotating cylinder to rotate.

[0025] The bottom of each of the two connecting frames is fixedly connected to the top of the drive motor or the bearing seat, and the top of each connecting frame is fixedly connected to the bottom of the partition plate.

[0026] The mounting slots are formed on the outer surface of the rotating cylinder, and the discharge section is located inside the mounting slots.

[0027] Preferably, it further includes:

[0028] Two fixing plates are fixedly connected to the inner wall of the cleaning box, and side grooves are opened on the opposite end faces of the fixing plates.

[0029] The movable plates are movably connected inside the side groove. The ends of the movable plates are pressed against the outer surface of the rotating cylinder. Multiple push springs are evenly provided at the ends of the movable plates away from the rotating cylinder. The other ends of the push springs are fixedly connected to the side wall of the side groove.

[0030] The two baffles are fixedly connected to the bottom of the box, and the sidewalls of the baffles are slidably connected to the outer surface of the cleaning box.

[0031] The bottom of each of the multiple return springs is fixedly connected to the inner bottom of the box, and the top of each return spring is fixedly connected to the bottom of the cleaning box.

[0032] Preferably, it further includes:

[0033] The expansion section has its bottom fixedly connected to the top of the cleaning box, and its top fixedly connected to the bottom of the partition plate. The expansion section is provided with a thermal expansion material.

[0034] Bottom holes, all of which are provided at the bottom of the return pipe;

[0035] A flow restrictor is movably connected inside the bottom hole and adjusts the amount of waste gas returning inside the return pipe;

[0036] The tops of the multiple round rods are fixedly connected to the bottom of the flow-limiting plate, and the bottoms of the multiple round rods pass through the partition plate and are fixedly connected to the top of the cleaning box. The round rods are located inside the expansion section, and the diameter of the round rods is not greater than the width of the flow-limiting plate.

[0037] Preferably, it further includes:

[0038] The mounting bracket is sealed and fixedly connected to the inner wall of the box. The outer surface of the filter screen is sealed and fixedly connected to the inner wall of the mounting bracket. The filter screen has a plurality of filter holes evenly distributed inside. The movable plate has a plurality of matching holes evenly distributed inside. The filter holes correspond to the matching holes.

[0039] A central hole is provided, located at the center of the movable plate, and allows for the flow of returning waste gas.

[0040] The multiple connecting holes are interconnected with the matching holes, and the center of each of the multiple connecting holes is connected to the interior of the central hole. The waste gas flowing back into the central hole enters the interior of the multiple matching holes through the connecting holes.

[0041] The return port, a plurality of the return ports are opened inside the partition plate and connected to the opening of the return pipe, and the lower part of the return port corresponds to the top of the movable plate and is staggered with the central hole.

[0042] Preferably, it further includes:

[0043] The liquid inlet hose has its top end passing through the bottom of the cleaning tank and connecting to the inside of the cleaning tank, and its other end passing through the tank body and connecting to the cleaning solution tank through the pump body.

[0044] The liquid outlet hose has its top end passing through the bottom of the cleaning tank and connected to the inside of the cleaning tank, and its other end passing through the tank body and connected to the recycling tank through the pump body.

[0045] Both the inlet hose and the outlet hose are equipped with solenoid valves. When both solenoid valves are open, the inlet hose allows cleaning fluid to flow into the cleaning tank, and the wastewater from the cleaning tank is discharged and recycled through the outlet hose.

[0046] Preferably, it further includes:

[0047] An air inlet is located on the side of the housing near the filter screen, and exhaust gas enters the housing through the air inlet.

[0048] An air outlet is located on the side of the housing away from the filter screen, and the deodorized gas is discharged into the housing through the air outlet.

[0049] An exhaust fan is located inside the air inlet and air outlet and draws in gas.

[0050] Preferably, it further includes:

[0051] A baffle plate, the top of which is fixedly connected to the bottom of the partition plate and located on the side of the movable plate away from the filter screen, the baffle plate blocks and limits the backflow of exhaust gas flowing above the movable plate;

[0052] Support springs, the tops of which are fixedly connected to the bottom of the movable plate, and the bottoms of which are fixedly connected to the inner bottom of the housing.

[0053] Preferably, it further includes:

[0054] The first concentration sensor is located at the bottom of the partition plate near the air inlet end. The first concentration sensor is used to detect the concentration value of the exhaust gas entering the box.

[0055] The second concentration sensor is located at the bottom of the partition plate near the air outlet. The second concentration sensor is used to detect the concentration value of the exhaust gas inside the box after low-temperature plasma treatment.

[0056] An activated carbon plate is fixedly connected to the inner wall of the box near the air outlet. The activated carbon plate adsorbs and treats the exhaust gas after it has been treated by low-temperature plasma.

[0057] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0058] 1. In this invention, by setting up the cooperation of components such as the rotating cylinder and the discharge section, when the ionization efficiency of the discharge section located above decreases, the rotating cylinder is rotated to replace the operation of the discharge section, thereby realizing the replacement of discharge without stopping the machine, ensuring the deodorization efficiency of the exhaust gas, and meeting the actual high-efficiency production needs.

[0059] 2. In this invention, the expansion section and heating plate are designed to work together. When the concentration of external exhaust gas increases, the heating temperature of the heating plate increases accordingly. This ensures thorough and effective drying and dehumidification of the external exhaust gas. The expansion section expands and moves the cleaning box downwards. The number of discharge sections on the outer surface of the rotating cylinder increases, further improving the thorough and effective ionization and deodorization of the exhaust gas with increased concentration, thus ensuring deodorization quality and efficiency.

[0060] 3. In this invention, by setting up components such as a return pipe and a flow limiting plate to cooperate with each other, the return pipe will return part of the waste gas and perform repeated ionization, which effectively improves the deodorization effect. Furthermore, when the cleaning box moves up and down, the blocking area of ​​the flow limiting plate on the return pipe is adjusted accordingly, thereby adjusting the amount of waste gas returning inside the return pipe, further ensuring that the waste gas can be thoroughly and effectively ionized and deodorized, with stronger controllability and higher linkage.

[0061] 4. In this invention, by setting up the cooperation of components such as the filter screen and the movable plate, the movable plate moves up and down according to the amount of waste gas returning inside the return pipe, thereby adjusting the amount of external waste gas entering the rotating cylinder and the end of the discharge section, thereby ensuring the continuous stability of subsequent ionization work and avoiding the reduction of the continuity and stability of external waste gas flow due to impurities clogging the filter screen during long-term operation. Attached Figure Description

[0062] Figure 1 This is a frontal three-dimensional structural diagram of the present invention;

[0063] Figure 2 This is a rear-view three-dimensional structural diagram of the present invention;

[0064] Figure 3 This is a frontal view of the internal three-dimensional structure of the central axis surface of the present invention;

[0065] Figure 4 for Figure 3 Enlarged view of point A in the middle;

[0066] Figure 5 This is a schematic diagram of the internal three-dimensional structure of the right-side central axis surface of the present invention;

[0067] Figure 6 for Figure 5 Enlarged view of point B in the middle;

[0068] Figure 7 This is a frontal view of the internal three-dimensional structure of the reflux pipe of the present invention;

[0069] Figure 8 for Figure 7 Enlarged view of point C in the middle;

[0070] Figure 9 This is a three-dimensional exploded view of the discharge section of the present invention;

[0071] Figure 10 This is a three-dimensional exploded view of the cleaning box of the present invention;

[0072] Figure 11 This is a schematic diagram of the exploded three-dimensional structure of the filter screen of the present invention.

[0073] In the diagram: 1. Box body; 2. Box cover; 3. Support legs; 4. Box door; 5. Buckle; 6. Air inlet; 7. Air outlet; 8. Exhaust fan; 9. Liquid inlet hose; 10. Liquid outlet hose; 11. Solenoid valve; 12. Rotating cylinder; 13. Mounting slot; 14. Discharge section; 15. Drive motor; 16. Bearing seat; 17. Connecting frame; 18. Fixing plate; 19. Side groove; 20. Push spring; 21. Moving plate; 22. Cleaning box; 23. Baffle; 24. Return spring 25. Expansion section; 26. Round rod; 27. Flow limiting plate; 28. Return pipe; 29. ​​Bottom hole; 30. Mounting bracket; 31. Filter screen; 32. Filter hole; 33. Movable plate; 34. Matching hole; 35. Center hole; 36. Connecting hole; 37. Barrier plate; 38. Support spring; 39. First concentration sensor; 40. Second concentration sensor; 41. Divider plate; 42. Handle; 43. Heating plate; 44. Activated carbon plate; 45. Drive shaft; 46. Return port. Detailed Implementation

[0074] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0075] like Figure 1 - Figure 11 As shown, a low-temperature plasma deodorization device includes: a housing 1, which deodorizes waste gas inside the housing 1, and the odorous gas flows inside the housing 1. The odorous gas is discharged after being deodorized by low-temperature plasma and activated carbon. A partition plate 41 is fixedly connected to the top of the housing 1 and provides support and partition. The partition plate 41 seals and fixes the top of the housing 1. A cover 2 is fixedly connected to the top of the housing 1. The partition plate 41 is located between the cover 2 and the housing 1. Therefore, the partition plate 41 divides the housing 1 and the cover 2 into two spaces. This arrangement facilitates the recirculation and repeated treatment of waste gas.

[0076] Support legs 3, multiple support legs 3 are fixedly connected to the bottom of the box body 1; the support legs 3 improve the stability of the box body 1. Box door 4, box door 4 is movably connected to one side of the box body 1; opening the box door 4 facilitates the inspection, maintenance and cleaning of the internal structure. Buckles 5, multiple buckles 5 are movably connected between the box body 1, the box cover 2 and the box door 4; the buckles 5 further improve the sealing and integrity of the box body 1, the box cover 2 and the box door 4. Handles 42, multiple handles 42 are fixedly connected to the outer surface of the box cover 2 and the box door 4; the operator uses the handles 42 to open the box cover 2 or the box door 4. Controller, controller is fixedly connected to one side of the box body 1 and electrically controls various electrical components.

[0077] Heating plates 43, multiple heating plates 43 are fixedly connected to the bottom of the partition plate 41 and adjust the internal heating temperature of the chamber 1. The heating plates 43 can be electrically controlled to adjust the heating temperature, thereby adjusting the internal temperature of the chamber 1 and improving the high-temperature dehumidification effect of the exhaust gas. This prevents water vapor in the exhaust gas from adhering to the discharge section 14 and affecting the subsequent low-temperature plasma deodorization of the exhaust gas. Rotating cylinder 12 is rotatably connected to the inside of the chamber 1. Discharge section 14, multiple discharge sections 14 are fixedly connected to the outer surface of the rotating cylinder 12 and emit low-temperature plasma. When the cylinder 12 rotates, it drives the discharge section 14 to rotate accordingly. The discharge section 14 located above the rotating cylinder 12 works to discharge, while the discharge section 14 located below the rotating cylinder 12 stops to clean. This allows the discharge section 14 to work without stopping, improving deodorization efficiency. The cleaning box 22 is movably connected inside the box body 1 to clean the ends of the discharge section 14 on the outer surface of the rotating cylinder 12. The cleaning box 22 contains cleaning fluid, which flushes the non-working discharge section 14 located inside the cleaning box 22, further realizing the continuous and efficient discharge deodorization process of the discharge section 14.

[0078] Specifically, a drive shaft 45 is fixedly connected to the central axis of the rotating cylinder 12 and drives the rotating cylinder 12 to rotate; the rotation of the drive shaft 45 synchronously drives the rotating cylinder 12 to rotate, and the rotating cylinder 12 drives multiple discharge units 14 to rotate; a drive motor 15 is fixedly connected to the end of the drive shaft 45; the drive motor 15 starts and drives the drive shaft 45 to rotate; a bearing seat 16 is rotatably connected to the outer surface of the drive shaft 45, and the bearing seat 16 improves the rotational stability of the drive shaft 45; the drive motor 15 starts and drives the drive shaft 45 to rotate inside the bearing seat 16, the drive shaft 45 drives the rotating cylinder 12 to rotate, and the rotating cylinder 12 drives multiple discharge units 14 to rotate and adjust the cleaning position; two connecting frames 17 are fixedly connected at their bottoms to the drive motor 15 or the top of the bearing seat 16 respectively. The top of the connecting frame 17 is fixedly connected to the bottom of the partition plate 41; the connecting frame 17 fixes the position of the rotating cylinder 12, so the height of the rotating cylinder 12 will not change during actual use. Then, by adjusting the height of the cleaning box 22, the cleaning height of the cleaning liquid inside the cleaning box 22 on the rotating cylinder 12 and the number of cleaning parts 14 are adjusted accordingly. Multiple mounting slots 13 are opened on the outer surface of the rotating cylinder 12, and the discharge parts 14 are all located inside the mounting slots 13. The setting of the mounting slots 13 improves the fixing effect of the rotating cylinder 12 on the discharge parts 14, but the end of the discharge parts 14 still protrudes from the rotating cylinder 12 and facilitates subsequent discharge. The number of mounting slots 13 and discharge parts 14 is odd and they are staggered, that is, when the rotating cylinder 12 drives the discharge parts 14 to rotate, the discharge parts 14 will not be synchronously squeezed and contacted with the moving plates 21 on both sides.

[0079] Fixed plates 18 are fixedly connected to the inner wall of the cleaning box 22 and remain in the same position. The length of the fixed plates 18 is greater than the length of the rotating cylinder 12. Side grooves 19 are provided on the opposite end faces of the fixed plates 18. Movable plates 21 are movably connected to the inside of the side grooves 19. The movable plates 21 can move inside the side grooves 19. The ends of the movable plates 21 are in pressure contact with the outer surface of the rotating cylinder 12. In addition to scraping and cleaning the outer surface of the rotating cylinder 12, the movable plates 21 can also drive the discharge part 14 to rotate and move up and down with the rotating cylinder 12. Multiple push springs 20 are evenly provided at the ends of the movable plates 21 away from the rotating cylinder 12. The other ends of the push springs 20 are fixedly connected to the side wall of the side groove 19. The push springs 20 ensure that the ends of the movable plates 21 and the outer surface of the rotating cylinder 12 are always in pressure contact.

[0080] The height of the cleaning fluid inside the cleaning tank 22 does not exceed the height of the fixed plate 18 and the moving plate 21. That is, the cleaning fluid is located below the fixed plate 18 and the moving plate 21 and washes the rotating cylinder 12 and the discharge part 14 located below the fixed plate 18 and the moving plate 21. This setting ensures that the cleaning fluid inside the cleaning tank 22 can be adjusted to wash the outer surface of the rotating cylinder 12 and the discharge part 14.

[0081] Baffles 23, both baffles 23 are fixedly connected to the bottom of the box 1, and the side walls of baffles 23 are slidably connected to the outer surface of the cleaning box 22; the baffles 23 block the sides of the cleaning box 22, thereby ensuring that the exhaust gas inside the box 1 can only flow from the top of the cleaning box 22 and be deodorized by the discharge unit 14 through low-temperature plasma discharge. Reset springs 24, the bottoms of multiple reset springs 24 are fixedly connected to the bottom of the box 1, and the tops of reset springs 24 are fixedly connected to the bottom of the cleaning box 22. The reset springs 24 improve the elastic reset effect of the cleaning box 22.

[0082] The return pipes 28, multiple return pipes 28, recirculate the waste gas after low-temperature plasma deodorization for repeated treatment. The two ends of the return pipes 28 are located on the left and right sides of the rotating cylinder 12, respectively. Figure 3 As shown, the exhaust gas located at the right end of the rotating cylinder 12 after low-temperature plasma deodorization by the discharge section 14 can flow back to the left end of the rotating cylinder 12 along the return pipe 28 and undergo repeated low-temperature plasma deodorization, thereby improving the deodorization effect.

[0083] Expansion sections 25, the bottoms of which are fixedly connected to the top of the cleaning box 22, and the tops of which are fixedly connected to the bottom of the partition plate 41, are provided with thermal expansion material inside the expansion sections 25; the expansion sections 25 utilize the principle of thermal expansion and contraction, and when the volume of the expansion sections 25 increases, they cause the cleaning box 22 to move downwards. Bottom holes 29, multiple bottom holes 29 are opened at the bottom of the return pipe 28; flow restrictor 27, the flow restrictor 27 is movably connected inside the bottom holes 29 and adjusts the amount of waste gas returning inside the return pipe 28; when the flow restrictor 27 moves downwards inside the bottom holes 29, the blockage area of ​​the flow restrictor 27 inside the return pipe 28 decreases, and the amount of waste gas returning inside the return pipe 28 increases; round rod 26. The tops of multiple round rods 26 are fixedly connected to the bottom of the flow-limiting plate 27, and the bottoms of multiple round rods 26 pass through the partition plate 41 and are fixedly connected to the top of the cleaning box 22. The outer surface of the round rods 26 is sealed and slidably connected to the inner wall of the partition plate 41. Therefore, the thermal expansion material inside the expansion part 25 will not be discharged and lost along the gap between the round rods 26 and the partition plate 41. When the cleaning box 22 moves downward, it synchronously drives the round rods 26 to move downward. The round rods 26 drive the flow-limiting plate 27 to move downward. The round rods 26 are located inside the expansion part 25, and the diameter of the round rods 26 is not greater than the width of the flow-limiting plate 27. Therefore, the round rods 26 mainly play the role of connection and synchronous movement, and will not affect the flow rate of the flow-limiting plate 27 to the return flow rate of the exhaust gas inside the return pipe 28.

[0084] The inlet hose 9 passes through the bottom of the cleaning tank 22 and connects to the inside of the cleaning tank 22 at its top. The other end of the inlet hose 9 passes through the tank body 1 and connects to the cleaning liquid tank via the pump body. The pump body is activated and the cleaning liquid in the cleaning liquid tank flows through the inlet hose 9 into the cleaning tank 22. This cleaning liquid can flush and clean the rotating cylinder 12 and the discharge section 14 located inside the cleaning tank 22 and below the fixed plate 18 and the moving plate 21, thereby ensuring the subsequent low-temperature plasma deodorization effect on the exhaust gas. The outlet hose 10 passes through the cleaning tank at its top. The bottom of the cleaning tank 22 is connected to the inside of the cleaning tank 22. The other end of the outlet hose 10 passes through the tank body 1 and is connected to the recycling tank through the pump body. The cleaning fluid after cleaning inside the cleaning tank 22 is discharged into the recycling tank along the outlet hose 10 for recycling. Both the inlet hose 9 and the outlet hose 10 are equipped with solenoid valves 11. The solenoid valves 11 are mainly used to control the opening and closing of the inlet hose 9 and the outlet hose 10. When both solenoid valves 11 are open, the inlet hose 9 passes the cleaning fluid into the cleaning tank 22, and the wastewater after cleaning inside the cleaning tank 22 is discharged into the recycling tank along the outlet hose 10.

[0085] Air inlet 6 is located on the side of housing 1 near filter 31, and exhaust gas enters the interior of housing 1 through air inlet 6; air outlet 7 is located on the side of housing 1 away from filter 31, and the deodorized gas is discharged from the interior of housing 1 through air outlet 7; exhaust fan 8 is located inside air inlet 6 and air outlet 7 and draws in gas; the two exhaust fans 8 have the same structure, so both exhaust fans 8 are activated and apply suction force, and the external exhaust gas enters the interior of housing 1 through air inlet 6 for low-temperature plasma deodorization, and the gas after deodorization is completed is discharged through air outlet 7.

[0086] The first concentration sensor 39 is located at the bottom of the partition plate 41 near the air inlet 6. The first concentration sensor 39 is used to detect the concentration of exhaust gas entering the chamber 1. The concentration of external exhaust gas is accurately obtained with the help of the first concentration sensor 39. The second concentration sensor 40 is located at the bottom of the partition plate 41 near the air outlet 7. The second concentration sensor 40 is used to detect the concentration of exhaust gas inside the chamber 1 after low-temperature plasma treatment. The concentration of exhaust gas after low-temperature plasma treatment is accurately obtained with the help of the second concentration sensor 40. The activated carbon plate 44 is fixedly connected to the inner wall of the chamber 1 near the air outlet 7. After the gas is deodorized by low-temperature plasma, it passes through the activated carbon plate 44. The activated carbon plate 44 further removes impurities and odors from the gas by adsorption, so that the gas discharged along the air outlet 7 is colorless and odorless, meeting the emission requirements.

[0087] A filter screen 31 is fixedly connected inside the housing 1 and filters the exhaust gas. The filter screen 31 pre-filters the exhaust gas. A movable plate 33 is movably connected to the side of the filter screen 31 near the rotating cylinder 12. The movable plate 33 moves up and down to adjust the exhaust gas intake. That is, when the movable plate 33 moves downward, the amount of exhaust gas flowing along the filter screen 31 and the movable plate 33 decreases. Multiple return ports 46 are opened inside the partition plate 41 and connected to the opening of the return pipe 28. The lower part of the return ports 46 corresponds to the top of the movable plate 33 and is staggered with the central hole 35. The exhaust gas inside the housing 1 enters the return pipe 28 through the return ports 46 for return, thereby ensuring the thoroughness and efficiency of exhaust gas deodorization.

[0088] A baffle plate 37 is fixedly connected at its top to the bottom of a partition plate 41 and is located on the side of the movable plate 33 away from the filter screen 31. The baffle plate 37 blocks and limits the backflow of exhaust gas flowing above the movable plate 33. Similarly, the baffle plate 37 limits and blocks the position of the movable plate 33, ensuring that the movable plate 33 can only move up and down on the side of the filter screen 31 and adjust the exhaust gas flow. The baffle plate 37 and the mounting bracket 30 work together to seal the space above the movable plate 33, further ensuring the guidance and flow of gas. Support springs 38 are fixedly connected at their tops to the bottom of the movable plate 33 and at their bottoms to the inner bottom of the housing 1. The support springs 38 further realize the elastic reset effect of the movable plate 33.

[0089] Mounting bracket 30 is sealed and fixedly connected to the inner wall of housing 1. The outer surface of filter screen 31 is sealed and fixedly connected to the inner wall of mounting bracket 30. Mounting bracket 30 installs and fixes filter screen 31. Multiple filter holes 32 are evenly arranged inside filter screen 31. Filter holes 32 pre-filter exhaust gas. Multiple matching holes 34 are evenly arranged inside movable plate 33. Filter holes 32 correspond to matching holes 34. When the overlapping area of ​​matching holes 34 and filter holes 32 decreases, the exhaust gas throughput decreases accordingly. Central hole 35 is opened at the axis of movable plate 33 and allows return exhaust gas to flow. When the amount of exhaust gas returning along return pipe 28 increases, the exhaust gas pressure on the top of movable plate 33... The force applied by the part increases and drives the movable plate 33 to move downward. At the same time, the return waste gas continuously flows to the central hole 35 and flows downward, connecting to the connecting hole 36. Multiple connecting holes 36 are interconnected with the matching holes 34. The center of each of the multiple connecting holes 36 is connected to the interior of the central hole 35. The return waste gas inside the central hole 35 enters the interior of the multiple matching holes 34 along the connecting holes 36; while the waste gas in the central hole 35 enters the interior of the matching holes 34 along the multiple connecting holes 36 and flows to both sides. Thus, not only is the return of the return waste gas deodorized again by low-temperature plasma, but it can also apply a reverse force to the filter hole 32 and achieve a wind-powered clearing effect.

[0090] When the aforementioned low-temperature plasma deodorization device deodorizes waste gas, the water vapor in the waste gas easily causes impurities to adhere to the outer surface of the discharge section 14, thereby reducing the discharge efficiency of the discharge section 14. Furthermore, existing technologies often require shutdown for cleaning of the discharge section 14, further reducing the deodorization efficiency and effect. Simultaneously, when the concentration in the waste gas increases, if the low-temperature plasma deodorization efficiency of the discharge section 14 cannot be adjusted accordingly, the waste gas cannot be thoroughly and effectively deodorized, and this will also pollute the subsequent activated carbon plate 44 and reduce the waste gas flow efficiency. Moreover, even after the external waste gas passes through the low-temperature plasma deodorization section 14, an odor still remains, requiring recirculation. However, the recirculation flow rate cannot be adjusted during the recirculation process, and the intake volume of the external waste gas cannot be adjusted accordingly, resulting in incomplete and ineffective deodorization and discharge of the waste gas, thus reducing the deodorization efficiency and effect. Furthermore, with prolonged use, the filter screen 31 is prone to clogging with a large amount of impurities, affecting the flow efficiency and volume of subsequent waste gas, ultimately impacting the overall deodorization effect.

[0091] To address the aforementioned issues, in practical use, this low-temperature plasma deodorization device first installs the housing 1 in a suitable position, and secures the housing 1, housing cover 2, and housing door 4 using corresponding clips 5. The solenoid valve 11 inside the inlet hose 9 is opened, and under the action of the pump, the cleaning fluid from the cleaning fluid tank is introduced into the cleaning tank 22 via the inlet hose 9, with the cleaning fluid positioned directly below the fixed plate 18 and the moving plate 21. Then, the controller closes the solenoid valve 11 inside the inlet hose 9, and the heating plate 43 is turned on to a suitable temperature. The heating plate 43 provides heat to the interior of the housing 1 and achieves deodorization. The dehumidification treatment of the exhaust gas prevents water vapor in the exhaust gas from adhering to the outer surface of the rotating cylinder 12 and the discharge section 14, which would affect the subsequent discharge effect. At the same time, the expansion section 25 reaches a suitable size due to the principle of thermal expansion and contraction. The expansion section 25 drives the cleaning box 22 to move downward, and with the help of multiple return springs 24, the cleaning box 22 is placed at a suitable height. The cleaning box 22 drives the round rod 26 inside the expansion section 25 to move downward to a suitable height. The round rod 26 drives the flow limiting plate 27 to move downward along the bottom hole 29 to a suitable height. The flow limiting plate 27 blocks the return pipe 28 to a suitable extent.

[0092] Then the controller starts the exhaust fan 8 and applies suction force, such as Figure 3As shown, the external exhaust gas flows from left to right and sequentially passes through pre-filtration, low-temperature plasma deodorization, and activated carbon adsorption processes. Specifically, the external exhaust gas enters the housing 1 through the air inlet 6. When the concentration value detected by the first concentration sensor 39 reaches the preset value, the exhaust gas is first pre-filtered through the filter holes 32 inside the filter screen 31 and the matching holes 34 inside the movable plate 33. This screens and filters out large impurities in the exhaust gas, which then fall to the bottom of the housing 1 for subsequent recycling. After that, the exhaust gas reaches the rotating drum 12, where the heating plate 43 operates to heat and dry the exhaust gas inside the housing 1, thereby quickly removing water vapor from the exhaust gas and preventing the water vapor from adhering to the rotating drum 1. 2. The discharge section 14 ends and adheres to impurities, affecting the discharge effect. At the same time, the discharge section 14 located above the fixed plate 18 and the moving plate 21 works and continuously discharges. The discharge section 14 performs low-temperature plasma deodorization on the exhaust gas. The discharge section 14 located below the fixed plate 18 and the moving plate 21 stops working and is cleaned in the cleaning liquid, further improving the subsequent deodorization effect on the exhaust gas and the effect of non-stop replacement. After the exhaust gas is deodorized by low-temperature plasma, it reaches the activated carbon plate 44. The concentration value detected by the second concentration sensor 40 reaches the preset value. Then, the exhaust gas is discharged through the air outlet 7 after being adsorbed by the activated carbon plate 44, thus completing the filtration and deodorization process of the exhaust gas.

[0093] Simultaneously, as the exhaust gas continuously flows to the activated carbon plate 44, some of the exhaust gas flows back into the return pipe 28 along the return port 46 and then back to the top of the movable plate 33. Under the pressure of the downward flow of the exhaust gas, the movable plate 33 is driven to squeeze multiple support springs 38 and move downward to a suitable height. The movable plate 33 drives the matching hole 34 to move downward synchronously. The matching hole 34 and the filter hole 32 are staggered and adjust the amount of external exhaust gas filtered through the filter hole 32 to a suitable value. The returned exhaust gas flows above the movable plate 33 and flows downward along the central hole 35, and finally enters the matching hole 34 through multiple connecting holes 36 and is discharged. This not only enables repeated low-temperature plasma deodorization of the returned exhaust gas and improves the ionization deodorization effect, but also allows the returned exhaust gas flowing inside the matching hole 34 to flow towards the filter hole 32 and reverse impact to clear the impurities blocked inside the filter hole 32, further improving the unblocking effect and ensuring the continuous and stable flow of exhaust gas and the filtration and removal of impurities.

[0094] If the concentration value detected by the first concentration sensor 39 increases and the concentration value detected by the second concentration sensor 40 also increases during the continuous flow of external exhaust gas, it indicates that the concentration of external exhaust gas is greater than the low-temperature plasma deodorization efficiency of the exhaust gas inside the chamber 1. The deodorization efficiency needs to be adjusted accordingly to ensure that the exhaust gas can be thoroughly and effectively cleaned and deodorized. Specifically, the controller controls the heating plate 43 to generate heat and increase the temperature of the inside of the chamber 1. This increases the heating and drying effect of the heating plate 43 on the exhaust gas with increased concentration, thus preventing the water vapor content in the external exhaust gas from increasing and preventing impurities from adhering to the outer surface of the rotating cylinder 12 and the discharge part 14, which would affect the subsequent normal discharge.

[0095] Simultaneously, as the heating plate 43 heats up, the expansion part 25 expands and its volume increases. The expansion part 25 causes the cleaning box 22 to compress multiple return springs 24 and move downwards. The cleaning box 22 also causes the two fixed plates 18 and the moving plate 21 inside, as well as the cleaning fluid inside the cleaning box 22, to move downwards. Since the height of the rotating cylinder 12 remains unchanged, the rotating cylinder 12 causes multiple discharge parts 14 on its outer surface to move upwards relative to the cleaning box 22. With the help of the push spring 20, the moving plate 21 is always in contact with the outer surface of the rotating cylinder 12. The part above the moving plate 21 is... The increased number of discharge sections 14 increases the amount of low-temperature plasma generated during operation, thereby improving the cleaning and deodorizing effect of the low-temperature plasma on the exhaust gas. Furthermore, the increased heat generated by the heating plate 43 can dry and clean the outer surfaces of the rotating cylinder 12 and the discharge section 14 that rise along the cleaning liquid. At the same time, the moving plate 21 moves downward with the cleaning box 22 and scrapes off the cleaning liquid and other substances adhering to the outer surfaces of the rotating cylinder 12 and the discharge section 14, further preventing moisture and other substances in this part from adhering to impurities in the exhaust gas and affecting the discharge effect.

[0096] When the cleaning box 22 moves downward, the flow limiting plate 27 moves downward along the bottom hole 29 via the round rod 26. The flow limiting plate 27 reduces the blockage area inside the return pipe 28. As the exhaust gas deodorized by the low-temperature plasma of the discharge section 14 under the suction force of the exhaust fan 8 reaches the activated carbon plate 44, the return flow of the exhaust gas entering the return pipe 28 through the return port 46 increases accordingly. The return exhaust gas inside the return pipe 28 flows continuously and the amount of exhaust gas reaching the top of the movable plate 33 increases. The gas thrust applied to the top of the movable plate 33 by the return exhaust gas increases and correspondingly drives the movable plate 33 to squeeze multiple support springs 38 downward. The movable plate 33 drives multiple matching holes 34 to move downward synchronously. The overlapping area of ​​the matching holes 34 and the filter holes 32 decreases, and the amount of external exhaust gas entering the rotating cylinder 12 through the filter holes 32 and matching holes 34 decreases. This effectively avoids the continuous flow of external exhaust gas after the concentration increases and affects the normal discharge deodorization effect of the discharge section 14.

[0097] The refluxed exhaust gas above the movable plate 33 flows continuously into multiple matching holes 34 along the central hole 35 and the connecting hole 36. The refluxed exhaust gas inside the matching holes 34 flows to both sides, and at this time the volume of refluxed exhaust gas increases. The overlapping area between the matching hole 34 and the filter hole 32 decreases. When the refluxed exhaust gas flows towards the end of the filter hole 32, the reverse impact on the impurities and other blockages inside the filter hole 32 increases the clearing effect, further avoiding the blockage of the filter hole 32 and reducing the flow and deodorization effect of the external exhaust gas. At the same time, the refluxed exhaust gas can continue to reach the end of the rotating cylinder 12 along the matching hole 34. At this time, under the action of the low temperature plasma generated by the increased discharge section 14, the refluxed exhaust gas is repeatedly ionized and deodorized, further improving the thoroughness of deodorization and avoiding the incomplete deodorization and discharge when the exhaust gas rises, which affects the deodorization quality.

[0098] As the refluxed waste gas is repeatedly ionized and deodorized, the concentration of the waste gas gradually decreases and returns to normal. The concentration values ​​detected by the first concentration sensor 39 and the second concentration sensor 40 continuously decrease and return to normal. The heat generated by the heating plate 43 controlled by the controller continuously decreases to normal. The heating plate 43 continuously lowers the internal temperature of the housing 1 to normal. The volume of the expansion part 25 continuously decreases to normal due to its own thermal expansion and contraction. The expansion part 25 drives the cleaning box 22 to move upward and return to its original position. The cleaning box 22 drives the fixed plate 18 and the moving plate 21 on the inner wall to move upward and return to their original position. The moving plate 21 squeezes and pushes the spring 20 and moves inward along the side groove 19 and maintains pressure contact with the outer surface of the rotating cylinder 12 and the discharge part 14. The discharge part 14 located below the fixed plate 18 and the moving plate 21 stops working and is flushed and cleaned.

[0099] When the cleaning box 22 moves upward, the flow limiting plate 27 moves upward along the bottom hole 29 via the round rod 26. The blockage area of ​​the flow limiting plate 27 on the return pipe 28 increases, thus reducing the flow of the return waste gas along the return pipe 28. The downward thrust of the return waste gas on the upper part of the movable plate 33 decreases. Under the elastic force of the support spring 38, the movable plate 33 moves upward to return to its original position. The movable plate 33 causes the overlapping area of ​​the matching hole 34 and the filter hole 32 to return to its original position. The amount of external waste gas flowing along the filter hole 32 and the matching hole 34 and reaching the end of the rotating cylinder 12 returns to its initial size. The above process is repeated to deodorize the waste gas with low-temperature plasma. After being adsorbed by the activated carbon plate 44, the ionized waste gas is discharged through the air outlet 7 and the deodorization process is completed.

[0100] As the discharge section 14 continues to operate, some impurities inevitably adhere to its outer surface, affecting the discharge effect. At this time, the concentration value detected by the first concentration sensor 39 remains unchanged, while the concentration value detected by the second concentration sensor 40 increases. This process indicates that the ionization deodorization efficiency of the discharge section 14 in the exhaust gas has decreased, and this part needs to be replaced and cleaned. The controller then controls the drive motor 15 to start and drive the transmission shaft 45 to rotate. The transmission shaft 45 drives the rotating cylinder 12 to rotate, and the rotating cylinder 12 drives the multiple discharge sections 14 on the outer surface to rotate synchronously. For example, after rotating 180 degrees, the rotating cylinder 12 and multiple discharge sections 14 originally located above the fixed plate 18 and the moving plate 21 rotate into the cleaning box 22 and are rinsed and cleaned by the cleaning liquid. Meanwhile, the rotating cylinder 12 and multiple discharge sections 14 originally located below the fixed plate 18 and the moving plate 21 rotate to the top and start continuously discharging, thereby realizing the process of replacing the discharge section 14 without stopping the machine, further improving the low-temperature plasma deodorization efficiency of the exhaust gas and meeting the requirements of continuous and efficient operation.

[0101] Meanwhile, since the number of mounting slots 13 and discharge sections 14 is odd and they are staggered, when the rotating cylinder 12 drives multiple discharge sections 14 to rotate, the push spring 20 ensures that the end of the moving plate 21 is always in contact with the outer surfaces of the rotating cylinder 12 and the discharge sections 14. The end of the moving plate 21 can scrape and clean the outer surfaces of the rotating cylinder 12 and the discharge sections 14, preventing impurities and other contaminants on the outer surface of the rotating cylinder 12 from entering the cleaning box 22 and causing pollution, or preventing impurities and other contaminants in the cleaning liquid and exhaust gas below the rotating cylinder 12 from sticking together and affecting the subsequent normal discharge effect. In addition, the heating and dehumidification effect of the heating plate 43 further improves the dryness and cleanliness of the outer surfaces of the rotating cylinder 12 and the discharge sections 14 located above, ensuring the quality of subsequent discharge.

[0102] For example Figure 5When the rotating cylinder 12 drives the discharge section 14 to rotate clockwise, the rotating cylinder 12 drives the discharge section 14 on the right side to rotate downward and press against the moving plate 21, causing the moving plate 21 to move downward. The moving plate 21, through the fixed plate 18, drives the cleaning box 22 to press the reset spring 24 downward. The cleaning box 22, through the round rod 26, drives the flow limiting plate 27 to move downward inside the bottom hole 29. The amount of return waste gas flowing inside the return pipe 28 increases, and the amount of return waste gas discharged from the return pipe 28 to the top of the movable plate 33 increases, causing the movable plate 33 to press the support spring 38 downward. The movable plate 33 causes the overlapping area of ​​the matching hole 34 and the filter hole 32 to decrease. At the same time, the return waste gas above the movable plate 33 is discharged to the matching hole 34 along the central hole 35 and the connecting hole 36. As the gas volume increases, the reverse impact force of the matching hole 34 on the impurities blocking the filter hole 32 increases. At the same time, the amount of backflow waste gas flowing through the matching hole 34 to the outer surface of the rotating cylinder 12 and the discharge section 14 increases. When the moving plate 21 passes the discharge section 14, under the elastic force of the reset spring 24 and the support spring 38, the cleaning box 22 and the movable plate 33 move upward to return to their original positions. The small-range vibration of the cleaning box 22 and the movable plate 33 inside the box 1 further improves the unblocking and cleaning properties. This not only prevents the impurities inside the filter hole 32 from being blocked for a long time and affecting the normal flow of subsequent waste gas, but also prevents the cleaning liquid flowing inside the cleaning box 22 from settling inside the cleaning box 22 for a long time and reducing the subsequent rinsing and cleaning effect on the outer surface of the rotating cylinder 12 and the discharge section 14.

[0103] Similarly, when the rotating cylinder 12 rotates, it drives the discharge section 14 on the left to rotate upward and presses against the moving plate 21, causing the moving plate 21 to move upward. According to the above process, the cleaning box 22 and the moving plate 33 vibrate upward synchronously and achieve their own cleaning. In conjunction with the continuous rotation of the rotating cylinder 12, it further ensures that the filter screen 31 and the inside of the cleaning box 22 are cleaned by vibration pulses during the replacement of the discharge section 14 without stopping the machine, ensuring continuous, stable and efficient subsequent work. At the same time, the solenoid valve 11 inside the liquid outlet hose 10 is opened, and the cleaning liquid inside the cleaning box 22 can be discharged along the liquid outlet hose 10. Then the solenoid valve 11 inside the liquid outlet hose 10 is closed, and the solenoid valve 11 inside the liquid inlet hose 9 is reopened. The cleaning liquid is introduced into the cleaning box 22 along the liquid inlet hose 9 and then the solenoid valve 11 is closed. This ensures that the amount of cleaning liquid inside the cleaning box 22 is always clean and stable, further improving the subsequent flushing and cleaning effect on the outer surface of the rotating cylinder 12 and the discharge section 14.

[0104] The above process is then repeated continuously to deodorize the exhaust gas in the air using low-temperature plasma. The gas discharged along the air outlet 7 may still mix with the external exhaust gas and be introduced into the air inlet 6 for multiple deodorizations. When the concentration values ​​detected by the first concentration sensor 39 and the second concentration sensor 40 are both less than the set minimum concentration value, it indicates that the external exhaust gas has been deodorized. Then, all structures can be closed and the deodorization position can be changed.

[0105] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0106] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A low-temperature plasma deodorization device, characterized in that, include: Box (1), the interior of which is subjected to low-temperature plasma deodorization of exhaust gas; A partition plate (41) is fixedly connected to the top of the box (1) and supports the partition; Heating plates (43), multiple heating plates (43) are fixedly connected to the bottom of the partition plate (41) and adjust the internal heating temperature of the box (1); Rotating cylinder (12), which is rotatably connected to the inside of the box body (1); Discharge section (14), multiple discharge sections (14) are fixedly connected to the outer surface of the rotating cylinder (12) and emit low-temperature plasma. The rotating cylinder (12) rotates and drives the discharge section (14) to rotate. Cleaning box (22), which is movably connected to the inside of the box body (1) and cleans the end of the discharge part (14) below the outer surface of the rotating cylinder (12); The return pipes (28) and multiple return pipes (28) will return the waste gas after low temperature plasma deodorization for repeated treatment; Filter screen (31), the filter screen (31) is fixedly connected to the inside of the box (1) and pre-filters the exhaust gas; Movable plate (33), which is movably connected to the filter screen (31) on the side near the rotating cylinder (12), the movable plate (33) moves up and down to adjust the exhaust gas intake; A drive shaft (45) is fixedly connected to the central shaft of the rotating cylinder (12) and drives the rotating cylinder (12) to rotate. A drive motor (15) is fixedly connected to the end of a transmission shaft (45). The bearing housing (16) has its inner wall rotatably connected to the outer surface of the drive shaft (45). The drive motor (15) starts and drives the drive shaft (45) to rotate inside the bearing housing (16). The drive shaft (45) drives the rotating cylinder (12) to rotate. The bottom of each of the two connecting frames (17) is fixedly connected to the top of the drive motor (15) or the bearing seat (16), and the top of each connecting frame (17) is fixedly connected to the bottom of the partition plate (41). Mounting slots (13) are provided on the outer surface of the rotating cylinder (12), and the discharge part (14) is located inside the mounting slots (13).

2. The low-temperature plasma deodorization device according to claim 1, characterized in that, Also includes: Fixing plate (18), two fixing plates (18) are fixedly connected to the inner wall of the cleaning box (22), and side grooves (19) are opened on the opposite end faces of the fixing plates (18). Movable plate (21), both of the movable plates (21) are movably connected inside the side groove (19). The ends of the movable plates (21) are pressed against the outer surface of the rotating cylinder (12). Multiple push springs (20) are evenly provided at the ends of the movable plates (21) away from the rotating cylinder (12). The other end of the push springs (20) is fixedly connected to the side wall of the side groove (19). Baffle (23), both baffles (23) are fixedly connected to the bottom of the box (1), and the side wall of the baffle (23) is slidably connected to the outer surface of the cleaning box (22); The bottom of each of the reset springs (24) is fixedly connected to the inner bottom of the housing (1), and the top of each of the reset springs (24) is fixedly connected to the bottom of the cleaning box (22).

3. The low-temperature plasma deodorization device according to claim 1, characterized in that, Also includes: The bottom of each expansion section (25) is fixedly connected to the top of the cleaning box (22), and the top of each expansion section (25) is fixedly connected to the bottom of the partition plate (41). The expansion section (25) is provided with thermal expansion material. Bottom holes (29), all of the aforementioned bottom holes (29) are located at the bottom of the return pipe (28); A flow restrictor (27) is movably connected inside the bottom hole (29) and adjusts the amount of waste gas returning inside the return pipe (28); The top of each of the round rods (26) is fixedly connected to the bottom of the flow restrictor (27), and the bottom of each of the round rods (26) passes through the partition plate (41) and is fixedly connected to the top of the cleaning box (22). The round rods (26) are located inside the expansion part (25), and the diameter of the round rods (26) is not greater than the width of the flow restrictor (27).

4. The low-temperature plasma deodorization device according to claim 1, characterized in that, Also includes: Mounting bracket (30), which is sealed and fixedly connected to the inner wall of the box (1), the outer surface of the filter screen (31) is sealed and fixedly connected to the inner wall of the mounting bracket (30), the filter screen (31) is uniformly provided with multiple filter holes (32), the movable plate (33) is uniformly provided with multiple matching holes (34), and the filter holes (32) correspond to the matching holes (34); A central hole (35) is provided at the center of the movable plate (33) and allows for the flow of return waste gas. The connecting holes (36) are interconnected with the matching holes (34). The center of each of the connecting holes (36) is connected to the interior of the central hole (35). The waste gas flowing back into the interior of the central hole (35) enters the interior of the multiple matching holes (34) through the connecting holes (36). The return port (46) is located inside the partition plate (41) and connected to the opening of the return pipe (28). The lower part of the return port (46) corresponds to the top of the movable plate (33) and is staggered with the central hole (35).

5. The low-temperature plasma deodorization device according to claim 1, characterized in that, Also includes: The top of the inlet hose (9) passes through the bottom of the cleaning tank (22) and is connected to the inside of the cleaning tank (22). The other end of the inlet hose (9) passes through the tank body (1) and is connected to the cleaning liquid tank through the pump body. The top of the outlet hose (10) passes through the bottom of the cleaning tank (22) and is connected to the inside of the cleaning tank (22). The other end of the outlet hose (10) passes through the tank body (1) and is connected to the recycling tank through the pump body. Both the inlet hose (9) and the outlet hose (10) are equipped with solenoid valves (11). When the solenoid valves (11) are open, the inlet hose (9) passes the cleaning fluid into the cleaning tank (22). The wastewater in the cleaning tank (22) after cleaning is discharged and recycled along the outlet hose (10).

6. The low-temperature plasma deodorization device according to claim 1, characterized in that, Also includes: Air inlet (6), the air inlet (6) is opened on the side of the box (1) near the filter screen (31), and the exhaust gas enters the box (1) through the air inlet (6); Air outlet (7) is located on the side of the box (1) away from the filter (31). After deodorization, the gas is discharged into the box (1) through the air outlet (7). An exhaust fan (8) is located inside the air inlet (6) and the air outlet (7) and draws in gas.

7. The low-temperature plasma deodorization device according to claim 1, characterized in that, Also includes: A baffle plate (37) is fixedly connected to the bottom of a partition plate (41) and located on the side of the movable plate (33) away from the filter screen (31). The baffle plate (37) blocks and limits the backflow of exhaust gas flowing above the movable plate (33). Support springs (38), the tops of multiple support springs (38) are fixedly connected to the bottom of the movable plate (33), and the bottoms of the support springs (38) are fixedly connected to the inner bottom of the box (1).

8. The low-temperature plasma deodorization device according to claim 6, characterized in that, Also includes: The first concentration sensor (39) is located at the bottom of the partition plate (41) near the air inlet (6). The first concentration sensor (39) is used to detect the concentration value of the exhaust gas entering the box (1). The second concentration sensor (40) is located at the bottom of the partition plate (41) near the air outlet (7). The second concentration sensor (40) is used to detect the concentration value of the exhaust gas inside the box (1) after low temperature plasma treatment. Activated carbon plate (44) is fixedly connected to the inner wall of the box (1) near the air outlet (7). The activated carbon plate (44) adsorbs and treats the waste gas after low temperature plasma treatment.

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