An antibacterial and anti-viral laboratory air quality control device

Abstract

The application belongs to the technical field of air quality control, and particularly relates to an antibacterial and anti-virus laboratory air quality control device, which comprises a warehouse body, a first air pump, an air inlet pipe, a second air pump, an installation pipe, an air outlet pipe and an air detection device. The warehouse body is located in a laboratory. The first air pump is arranged on the outside of the warehouse body. The output end of the first air pump is fixed with the air inlet pipe. The end of the air inlet pipe away from the first air pump is connected with the warehouse body. The second air pump is arranged on the outside of the warehouse body. The input end of the second air pump is fixed with the installation pipe. The end of the installation pipe away from the second air pump is connected with the warehouse body. The output end of the second air pump is fixed with the air outlet pipe. The air outlet pipe extends to the outside of the laboratory. The air detection device is located on the inside of the warehouse body. The air quality and air waste content in the warehouse body can be controlled, the air quality and waste content can be replaced more quickly, and the detection time of waste gas is greatly shortened.

Description

Technical Field

[0001] This invention belongs to the field of air quality control technology, specifically relating to an antibacterial and antitoxic laboratory air quality control device. Background Technology

[0002] With the development of science and technology and the increase in social demand, laboratories play an important role in various fields. Laboratories need to process and analyze various samples, such as bacteria, viruses, and chemicals. These samples may have certain hazards and pollutants. If they are not effectively controlled and managed, they may cause harm to laboratory personnel and the environment. Therefore, it is very important to ensure the air quality in laboratories. In some laboratories, a chamber is set up into which different exhaust gases, such as PM2.5 gas and tobacco smoke, are introduced. This chamber can be used to detect these gases in order to find ways to improve or purify them. Currently, some patents or institutions involve technologies related to laboratory air quality detection or improvement. For example, the laboratory air quality detection device proposed in publication number CN217156466U is easy to fix and hang for laboratory air quality detection. It is also easy to use for laboratory gas detection with efficient air intake from both sides, real-time detection and digital display of temperature and humidity in the laboratory environment, and voice broadcast of various gas values ​​for laboratory air quality detection. It is also easy to use for flashing and beeping prompts for the detection of harmful gases in the laboratory. It has high stability and practicality and has certain promotional value. For example, the temperature and humidity laboratory air quality detection and treatment device proposed in publication number CN218001714U has a simple structure and is easy to operate. The laboratory is in a fresh air mode, and residual harmful substances are circulated through the unit to keep the indoor air sterile and fresh. However, the aforementioned and existing technologies still have some shortcomings, such as: The aforementioned device can only detect one type of air quality parameter in the chamber for a short period of time, and cannot detect different types of air quality in a short period of time. Therefore, when multiple experiments are required, the progress is often slow, and it may take at least half a month or even longer. Therefore, it is necessary to develop a new type of laboratory air quality control device to address the aforementioned problems. Summary of the Invention

[0003] The purpose of this invention is to provide an antibacterial and antitoxic laboratory air quality control device that can control the air quality and exhaust gas content in the laboratory chamber, and control the replacement of air quality and exhaust gas content more quickly, thereby greatly shortening the detection time of exhaust gas.

[0004] The specific technical solution adopted by this invention is as follows: An antibacterial and antitoxic laboratory air quality control device includes a chamber located inside a laboratory, and further includes: A first air pump is disposed on the outside of the chamber body. An air inlet pipe is fixed to the output end of the first air pump, and the end of the air inlet pipe away from the first air pump is connected to the chamber body. The second air pump is located on the outside of the chamber. The input end of the second air pump is fixed with an installation pipe. The end of the installation pipe away from the second air pump is connected to the chamber. The output end of the second air pump is fixed with an exhaust pipe, and the exhaust pipe extends to the outside of the laboratory. An air detection device is located inside the chamber and is used to detect and analyze the air quality inside the chamber. A gas guiding assembly is used to guide polluted gas into the inside of the air inlet pipe and into the chamber through the air inlet pipe.

[0005] The gas guiding assembly includes an exhaust gas chamber. Multiple partitions are provided on the inner side of the exhaust gas chamber to divide the inner side of the exhaust gas chamber into multiple cavities. Gas placement chambers are provided on the periphery of the exhaust gas chamber in the same number and corresponding positions as the cavities on the inner side of the exhaust gas chamber. The gas placement chambers are connected to the cavities on the inner side of the exhaust gas chamber. A gas generating device is provided on the inner side of the gas placement chamber. The outer side of the exhaust gas chamber is provided with exhaust gas ducts of the same number and corresponding positions as the cavities, and each exhaust gas duct is inserted into the corresponding cavity. A conversion component is installed at the end of the exhaust gas duct away from the exhaust gas chamber. A gas guide pipe is provided on the conversion component, and the end of the gas guide pipe away from the conversion component is connected to the air inlet pipe.

[0006] The conversion assembly includes a fixed plate disposed on the outside of the exhaust gas duct. The fixed plate is provided with a first air guide hole corresponding to the exhaust gas duct, and each exhaust gas duct is inserted into the inner side of the first air guide hole. A rotating plate is rotatably connected to the side of the fixed plate away from the exhaust gas hopper. A second air guide hole is provided inside the rotating plate, and the second air guide hole corresponds to the first air guide hole. When the rotating plate rotates, the second air guide hole aligns with different first air guide holes. A drive assembly is mounted on the outer side of the rotating disk, and the drive assembly is used to drive the rotating disk to rotate.

[0007] The drive assembly includes a servo motor, the output end of which is fixed with a gear, and a meshing wheel corresponding to the gear is provided on the outer side of the rotating disk, and the meshing wheel is meshed with the gear.

[0008] A filter assembly is installed in the middle of the air intake pipe and at the end of the air guide pipe near the first air pump. The filter assembly is used to filter the gas before the air guide assembly. The filter assembly includes an installation chamber located in the middle section of the air intake pipe. Both sides of the installation chamber are connected to the air intake pipe through a sealing connection structure. Sterilization rings are fixed at both ends of the inner side of the installation chamber. A first filter plate, a second filter plate, and a filter strip are installed sequentially on the inner side of the installation chamber between the two sterilization rings.

[0009] Both of the aforementioned sealing connection structures include a sliding tube slidably connected to the inside of the mounting chamber, and one end of the sliding tube away from the mounting chamber is slidably connected to the inside of the air intake pipe. A sealing block is provided on the side of the sliding tube facing the inner wall of the mounting chamber. A sealing ring is fixed on the inner wall of the mounting chamber at a position corresponding to the sealing block. The sealing ring is used to seal the sliding tube. A spring is fixed between the sealing block and the sealing ring. A push plate is also fixed on the outside of the sliding tube between the mounting chamber and the air intake pipe.

[0010] A rotating groove is provided on the outer side of the fixed disk. A sealing rotating piece is provided on the side of the rotating disk close to the fixed disk and at a position corresponding to the rotating groove, and the sealing rotating piece is inserted into the inner side of the rotating groove.

[0011] A solenoid valve is installed on the outside of the air intake pipe and between the mounting chamber and the air guide pipe.

[0012] A sealing gasket is fixed to the inner side of the air intake pipe and at one end of the sliding pipe located in the air intake pipe, and the sealing gasket is used to seal the sliding pipe and the air intake pipe.

[0013] The technical effects achieved by this invention are as follows: This invention, through the setting of a servo motor, can control different inner sides of the exhaust gas chamber to drill into the inner side of the air guide pipe, thereby controlling the air quality and exhaust gas content in the laboratory chamber, and thus controlling the replacement of air quality and exhaust gas content more quickly, thereby greatly shortening the exhaust gas detection time.

[0014] This invention, through the arrangement of a first filter plate, a second filter plate, and a filter strip, can filter the air in the intake pipe, and through the arrangement of the air guide pipe, can sterilize and disinfect the air, thereby purifying the drawn-in air and preventing the experimental results of exhaust gas from being affected by relatively turbid air, thus making the experimental results more accurate. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the structure of the present invention; Figure 2 This is a schematic diagram of the structure between the chamber body, the installation chamber, and the exhaust pipe in this invention; Figure 3 This is a schematic diagram of the structure between the gas placement chamber, the rotating disk, and the solenoid valve in this invention; Figure 4 This is a schematic diagram of the structure between the servo motor, the exhaust gas duct, and the gas guide pipe in this invention; Figure 5 This is a schematic diagram of the structure between the partition, the waste gas chamber, and the waste gas duct in this invention; Figure 6 This is a schematic diagram of the structure between the mounting chamber, the sealing rotating plate, and the meshing wheel in this invention; Figure 7 This is a cross-sectional view of the installation compartment in this invention; Figure 8 In this invention Figure 7 A larger image is shown at point A in the middle.

[0016] The attached diagram lists the components represented by each number as follows: 1. Chamber body; 2. Inlet pipe; 3. First air pump; 4. Second air pump; 5. Air detection device; 6. Exhaust gas cylindrical chamber; 7. Gas placement chamber; 8. Partition plate; 9. Fixed plate; 10. First air guide hole; 11. Rotating plate; 12. Rotating groove; 13. Sealing rotating plate; 14. Air guide pipe; 15. Meshing wheel; 16. Gear; 17. Servo motor; 18. Mounting chamber; 19. Sliding tube; 20. Sealing ring; 21. Spring; 22. Press plate; 23. Sealing gasket; 24. Sterilization ring; 25. First filter plate; 26. Second filter plate; 27. Filter strip; 28. Solenoid valve; 29. ​​Mounting tube; 30. Exhaust pipe; 31. Exhaust gas duct; 32. Sealing block; 33. Second air guide hole. Implementation

[0017] To make the objectives and advantages of this invention clearer, the invention will be specifically described below with reference to embodiments. It should be understood that the following text is merely used to describe one or more specific embodiments of the invention and does not strictly limit the scope of protection specifically claimed by the invention. Example

[0018] like Figure 1-6 As shown, an antibacterial and antitoxic laboratory air quality control device includes a chamber 1 located inside a laboratory. The chamber 1 is a sealed box with a sealed opening and closing door, and also includes: The first air pump 3 is located on the outside of the chamber 1. The output end of the first air pump 3 is fixed with an air inlet pipe 2, and the end of the air inlet pipe 2 away from the first air pump 3 is connected to the chamber 1. When the first air pump 3 is started, it can transmit outside air to the inside of the chamber 1 through the air inlet pipe 2. The second air pump 4 is located on the outside of the chamber 1. The input end of the second air pump 4 is fixed with an installation pipe 29. The end of the installation pipe 29 away from the second air pump 4 is connected to the chamber 1. The output end of the second air pump 4 is fixed with an exhaust pipe 30, which extends to the outside of the laboratory. When it is necessary to exchange the air inside the chamber 1, the air inside the chamber 1 can be drawn in by the second air pump 4 and discharged to the outside of the laboratory through the exhaust pipe 30. Water or activated carbon filter components can be installed outside the laboratory to prevent the gas inside the chamber 1 from polluting the outside air. An air detection device 5 is located inside the chamber 1 and is used to detect and analyze the air quality inside the chamber 1. The air detection device 5 may consist of one or more components, including: Air monitoring refers to the activity of sampling and measuring pollutants present in the air at fixed points, continuously or at fixed intervals, in order to evaluate air quality and control pollution. Specific devices for air monitoring include the following: Temperature and humidity sensors, particulate matter concentration sensors, etc., can simultaneously monitor the concentration of pollutants such as PM2.5, PM10, SO2, NOx, CO, and O3 in the air, as well as meteorological parameters such as temperature, humidity, wind speed, and wind direction. It can also be equipped with a laser dust monitor, which can monitor particulate matter of different sizes such as PM10, PM5, PM2.5, PM1 or TSP depending on the different cutters. The air measuring instruments within the air detection device 5 include, but are not limited to, the devices described above; A gas guiding assembly is used to guide polluted gas into the inside of the air inlet pipe 2 and into the chamber 1 through the air inlet pipe 2.

[0019] According to the above structure, in the laboratory, by starting the first air pump 3, outside air can be drawn into the inside of the chamber 1. When drawn into the inside of the chamber 1, the gas can be guided into the inside of the air inlet pipe 2 through the air guide component, and enter the inside of the chamber 1 along with the gas inside the air inlet pipe 2. The air is then detected by the air detection device 5. After the detection is completed, by starting the second air pump 4, the air inside the chamber 1 can be drawn into the inside of the exhaust pipe 30 through the installation pipe 29, and the first air pump 3 can guide the exhaust gas to the outside of the laboratory. Thus, the air quality can be changed and controlled in the laboratory. The controlled air quality is detected by the air detection device 5 inside the chamber 1, thereby gaining a further understanding of the exhaust gas and making sufficient preparations for subsequent exhaust gas improvement plans.

[0020] See attached document Figure 3-5 The gas guiding assembly includes an exhaust gas chamber 6, and multiple partitions 8 are provided on the inner side of the exhaust gas chamber 6. The partitions 8 are used to divide the inner side of the exhaust gas chamber 6 into multiple cavities. A gas placement chamber 7 is provided on the periphery of the exhaust gas chamber 6, which has the same number and position as the cavities on the inner side of the exhaust gas chamber 6. The gas placement chamber 7 is connected to the cavities on the inner side of the exhaust gas chamber 6. A gas generating device is provided on the inner side of the gas placement chamber 7. Each gas generating device is a different piece of equipment, and each has a different function, such as: The device that generates PM2.5 air quality is a mechanism that agitates fine particulate matter. It can consist of a motor and an agitator shaft. When the motor is started, its output controls the rotation of the agitator shaft, which in turn agitates the fine particulate matter and generates air quality similar to PM2.5. To create a smoky atmosphere, one can use a smoke detector or burn paper or plastic to release smoke, which can be considered similar to a smoky environment such as a smoking room. The exhaust gas produced above can flow through the air inlet pipe 2 and along the air inlet pipe 2 to the inside of the chamber 1, where it is detected by the air detection device 5 inside the chamber 1. Furthermore, the outer side of the exhaust gas chamber 6 is provided with exhaust gas ducts 31 of the same number and corresponding position as the cavities, and each exhaust gas duct 31 is inserted into the corresponding cavity. The exhaust gas is guided through the exhaust gas ducts 31 until it is guided to the inner side of the air guide pipe 14. A conversion component is installed at the end of the exhaust gas duct 31 away from the exhaust gas chamber 6. An air guide pipe 14 is provided on the conversion component, and the end of the air guide pipe 14 away from the conversion component is connected to the air inlet pipe 2. According to the above structure, when guiding the waste, waste gas can be generated inside the gas placement chamber 7 and transmitted to the inside of the waste gas duct 31 through the cavity. The waste gas duct 31 is then transmitted to the inside of the air guide pipe 14 through the conversion component, so that the waste gas can be transmitted to the inside of the air inlet pipe 2 through the air guide pipe 14 and then transmitted to the inside of the chamber 1 along with the air inside the air inlet pipe 2. A fan or other components can be installed at the rear of the waste gas cylindrical chamber 6 to blow the waste gas, thereby making it easier for the waste gas to enter the air guide pipe 14.

[0021] Among them, the air detection device 5 is connected to a computer host, which is used to calculate the average parameters of multiple sets of different exhaust gases. If PM2.5 exhaust gas is designated as A, then multiple emissions of PM2.5 exhaust gas can be numbered as: A1, A2, A3...A n The air is directed to chamber 1 and detected by the air detection device 5 inside chamber 1. The multiple measurements of the air detection device 5, such as temperature, humidity, and particle concentration, are summarized by the computer and the average value is calculated to obtain a relatively average data. See attached document Figure 6 The conversion assembly includes a fixed disk 9 disposed outside the exhaust gas duct 31. The fixed disk 9 is provided with a first air guide hole 10 corresponding to the exhaust gas duct 31. The diameter of the first air guide hole 10 is the same as that of the exhaust gas duct 31, thereby preventing gas from escaping. Each exhaust gas duct 31 is inserted into the inner side of the first air guide hole 10. A rotating disk 11 is rotatably connected to the side of the fixed disk 9 away from the exhaust gas chamber 6. A rotating groove 12 is provided on the outer side of the fixed disk 9. A sealing rotating piece 13 is provided on the side of the rotating disk 11 close to the fixed disk 9 and at the position corresponding to the rotating groove 12. The sealing rotating piece 13 is inserted into the inner side of the rotating groove 12. When the rotating disk 11 rotates, the sealing rotating piece 13 can rotate inside the rotating groove 12, thereby achieving the sealing of one side of the fixed disk 9 by the rotating disk 11 and the sealing rotating piece 13, thereby reducing the escape of exhaust gas and preventing exhaust gas from escaping to the outside of the chamber 1. The rotating disk 11 has a second air guide hole 33 inside, and the second air guide hole 33 corresponds to the first air guide hole 10. When the rotating disk 11 rotates, the second air guide hole 33 is aligned with different first air guide holes 10. The second air guide hole 33 and multiple first air guide holes 10 are coaxial. When the second air guide hole 33 rotates, it can correspond to different first air guide holes 10, thereby guiding the exhaust gas in different first air guide holes 10. The guided exhaust gas can be conducted to the intake pipe 2 through the air guide pipe 14. A drive assembly is mounted on the outer side of the rotating disk 11, which is used to drive the rotating disk 11 to rotate.

[0022] According to the above structure, the drive assembly includes a servo motor 17, which is mounted on the ground. The servo motor 17 is a closed-loop control element in a servo system that converts electrical signals into torque and speed to drive the controlled object. It has a feedback device that can monitor and adjust the motor's operating status in real time. It can achieve advantages such as high speed, high efficiency, high precision, high reliability, and high stability. It is widely used in industrial, aviation, aerospace, medical, robotics and other fields, which will not be elaborated here. The output end of the servo motor 17 is fixed with a gear 16. The outer side of the rotating disk 11 is provided with a meshing wheel 15 corresponding to the gear 16, and the meshing wheel 15 is meshed with the gear 16. The diameter of the gear 16 is the same as the diameter of the meshing wheel 15, so that after the gear 16 rotates a small amplitude, the meshing wheel 15 can rotate a large amplitude, thereby making it easier for the second air guide hole 33 on the rotating disk 11 to rotate to correspond with the first air guide hole 10. According to the above structure, when the second air guide hole 33 on the control rotating disk 11 is aligned with different first air guide holes 10, the servo motor 17 can be driven, so that the output end of the servo motor 17 drives the gear 16 to rotate, and through the meshing connection between the gear 16 and the meshing wheel 15, the meshing wheel 15 can control the second air guide hole 33 on the rotating disk 11 to correspond with different first air guide holes 10, so that different exhaust gases in the first air guide holes 10 can be conducted to the air guide pipe 14 through the second air guide hole 33; Furthermore, due to the high precision of the servo motor 17, the rotating disk 11 can rotate to a state where the second air guide hole 33 is misaligned with the first air guide hole 10, thereby allowing the exhaust gas in the first air guide hole 10 to drift into the second air guide hole 33 through a smaller aperture, thus controlling the content of exhaust gas in the chamber 1 and making the experiment more diverse. Example

[0023] This embodiment adds a filter component to the existing embodiment 1, which can pre-filter the drawn-in air and provide antibacterial and detoxifying effects. The specific structure of this filter component is as follows: See appendix Figure 7A filter assembly is installed in the middle of the intake pipe 2, at the end of the air guide pipe 14 near the first air pump 3. This filter assembly filters the gas before the air guide assembly. The filter assembly includes an installation chamber 18, which is located in the middle section of the intake pipe 2. The installation chamber 18 is positioned at the end of the air guide pipe 14 near the first air pump 3, thus enabling pre-filtration of the air. Both sides of the installation chamber 18 are connected to the intake pipe 2 via a sealed connection structure. A solenoid valve 28 is installed on the outside of the intake pipe 2, between the installation chamber 18 and the air guide pipe 14. By setting the solenoid valve 28, when the installation chamber 18 is disassembled or replaced, the solenoid valve 28 can be opened first, thereby allowing the solenoid valve 28 to control the intake pipe. 2. The air duct 14 is sealed to prevent the exhaust gas inside from the connection between the air inlet pipe 2 and the installation chamber 18. Both ends of the inner side of the installation chamber 18 are fixed with sterilization rings 24. The sterilization rings 24 are used to heat the air inside the installation chamber 18. A heating wire is provided inside the rings to kill bacteria in the air. Inside the installation chamber 18 and between the two sterilization rings 24, a first filter plate 25, a second filter plate 26 and a filter strip 27 are installed in sequence. The first filter plate 25 is a filter paper core, which is made of wood pulp paper with better filtration effect. The second filter plate 26 is a filter cotton and the filter strip 27 is an activated carbon filter layer to achieve strict filtration of the drawn-in air. According to the above structure, when the first air pump 3 draws in air, it passes through the installation chamber 18, and then the air is first filtered by the first filter plate 25 and the second filter plate 26. It is then further filtered by the filter strip 27. The two sterilization rings 24 not only facilitate the installation of the first filter plate 25, the second filter plate 26 and the filter strip 27, but also heat the drawn-in air, thereby sterilizing and disinfecting bacteria and other microorganisms in the air. This purifies the drawn-in air and prevents the experimental results of the exhaust gas from being affected by the relatively turbid air, thus making the experimental results more accurate.

[0024] See appendix Figure 7-8Furthermore, both sealing connection structures include a sliding tube 19 slidably connected to the inside of the mounting chamber 18, with one end of the sliding tube 19 slidably connected to the inside of the air intake pipe 2. The sliding tube 19 is used to lock one end inside the mounting chamber 18 and the other end is positioned inside the air intake pipe 2. A sealing gasket 23 is fixed to the inside of the air intake pipe 2 at the end of the sliding tube 19 located within the air intake pipe 2. The sealing gasket 23 seals the space between the sliding tube 19 and the air intake pipe 2. This arrangement ensures that when the sliding tube 19 is inserted into the inside of the air intake pipe 2, the sealing gasket 23 provides a seal. A sealing block 32 is provided on the inner wall of the mounting chamber 18 on the side of the sliding tube 19 facing the mounting chamber 18 to seal it. The sealing block 32 is used to lock the sliding tube 19 inside the mounting chamber 18 to prevent it from falling off. A sealing ring 20 is fixed on the inner wall of the mounting chamber 18 at the position corresponding to the sealing block 32. The sealing ring 20 is used to seal the sliding tube 19 and prevent gas from leaking between the sliding tube 19 and the mounting chamber 18. A spring 21 is fixed between the sealing block 32 and the sealing ring 20. A push plate 22 is also fixed on the outer side of the sliding tube 19 between the mounting chamber 18 and the air inlet pipe 2. When it is necessary to replace or repair the installation chamber 18 and replace the first filter plate 25, the second filter plate 26 and the filter strip 27 inside, press the actuating plate 22 towards the end near the installation chamber 18, thereby stretching the spring 21. At this time, the sliding tube 19, located in part of the air intake pipe 2, is completely separated from the air intake pipe 2, and the installation chamber 18 can be disassembled. After the replacement or repair of the installation chamber 18 is completed, press the actuating plate 22 again, thereby stretching the spring 21. At this time, one end of the sliding tube 19 can be aligned with the inside of the air intake pipe 2. Release the actuating plate 22, and the sliding tube 19 will be springed into the inside of the air intake pipe 2 by the spring 21, thereby completing the replacement of the installation chamber 18.

[0025] The above description is merely a preferred embodiment of the present invention. It should be noted that those skilled in the art can make various improvements and modifications without departing from the principles of the present invention, and these improvements and modifications should also be considered within the scope of protection of the present invention. Structures, devices, and operating methods not specifically described or explained in this invention are implemented according to conventional methods in the art unless otherwise specified or limited.

Claims

1. An antibacterial and antitoxic laboratory air quality control device, comprising a chamber (1) located within a laboratory, characterized in that, It also includes: A first air pump (3) is located on the outside of the chamber (1). An air inlet pipe (2) is fixed to the output end of the first air pump (3), and the end of the air inlet pipe (2) away from the first air pump (3) is connected to the chamber (1). The second air pump (4) is located on the outside of the chamber (1). The input end of the second air pump (4) is fixed with an installation pipe (29). The end of the installation pipe (29) away from the second air pump (4) is connected to the chamber (1). The output end of the second air pump (4) is fixed with an exhaust pipe (30), and the exhaust pipe (30) extends to the outside of the laboratory. An air detection device (5) is located inside the chamber (1) and is used to detect and analyze the air quality inside the chamber (1). A gas guiding assembly is used to guide polluted gas to the inside of the air inlet pipe (2) and to the chamber (1) through the air inlet pipe (2); The gas guiding assembly includes a waste gas cylinder (6), and a plurality of partitions (8) are provided on the inner side of the waste gas cylinder (6). The partitions (8) are used to divide the inner side of the waste gas cylinder (6) into a plurality of cavities. A gas placement chamber (7) is provided on the periphery of the waste gas cylinder (6) with the same number and corresponding position as the cavities on the inner side of the waste gas cylinder (6). The gas placement chamber (7) is connected to the cavities on the inner side of the waste gas cylinder (6). A gas generating device is provided on the inner side of the gas placement chamber (7). The outer side of the exhaust gas chamber (6) is provided with exhaust gas ducts (31) of the same number and position as the cavities, and each exhaust gas duct (31) is inserted into the corresponding cavity. A conversion component is installed at the end of the exhaust gas duct (31) away from the exhaust gas chamber (6). A gas guide pipe (14) is provided on the conversion component, and the end of the gas guide pipe (14) away from the conversion component is connected to the air inlet pipe (2). The conversion assembly includes a fixed disk (9) disposed outside the exhaust gas duct (31). The fixed disk (9) is provided with a first air guide hole (10) corresponding to the exhaust gas duct (31). Each exhaust gas duct (31) is inserted into the inner side of the first air guide hole (10). A rotating disk (11) is rotatably connected to the side of the fixed disk (9) away from the exhaust gas hopper (6). A second air guide hole (33) is provided inside the rotating disk (11). The second air guide hole (33) corresponds to the first air guide hole (10). When the rotating disk (11) rotates, the second air guide hole (33) aligns with different first air guide holes (10). A drive assembly is mounted on the outside of the rotating disk (11), which is used to drive the rotating disk (11) to rotate.

2. The laboratory air quality control device according to claim 1, characterized in that: The drive assembly includes a servo motor (17), the output end of which is fixed with a gear (16), and the outer side of the rotating disk (11) is provided with a meshing wheel (15) corresponding to the gear (16), and the meshing wheel (15) is meshed with the gear (16).

3. The laboratory air quality control device according to claim 1, characterized in that: A filter assembly is installed in the middle of the air inlet pipe (2) and at the end of the air guide pipe (14) near the first air pump (3). The filter assembly is used to filter the gas before the air guide assembly. The filter assembly includes an installation chamber (18). The installation chamber (18) is located in the middle section of the air inlet pipe (2), and both sides of the installation chamber (18) are connected to the air inlet pipe (2) through a sealing connection structure. Both ends of the inner side of the installation chamber (18) are fixed with sterilization rings (24). A first filter plate (25), a second filter plate (26), and a filter strip (27) are installed sequentially on the inner side of the installation chamber (18) between the two sterilization rings (24).

4. The laboratory air quality control device according to claim 3, characterized in that: Both of the sealing connection structures include a sliding tube (19) slidably connected to the inside of the mounting chamber (18), and the end of the sliding tube (19) away from the mounting chamber (18) is slidably connected to the inside of the air intake pipe (2). A sealing block (32) is provided on the inner wall of the mounting chamber (18) on the side of the sliding tube (19) facing the inner wall of the mounting chamber (18). A sealing ring (20) is fixed on the inner wall of the mounting chamber (18) at a position corresponding to the sealing block (32). The sealing ring (20) is used to seal the sliding tube (19). A spring (21) is fixed between the sealing block (32) and the sealing ring (20). A push plate (22) is also fixed on the outside of the sliding tube (19) between the mounting chamber (18) and the air intake pipe (2).

5. The laboratory air quality control device according to claim 2, characterized in that: A rotating groove (12) is provided on the outer side of the fixed disk (9). A sealing rotating piece (13) is provided on the side of the rotating disk (11) close to the fixed disk (9) and at the position corresponding to the rotating groove (12). The sealing rotating piece (13) is inserted into the inner side of the rotating groove (12).

6. The laboratory air quality control device according to claim 3, characterized in that: A solenoid valve (28) is installed on the outside of the air inlet pipe (2) and between the mounting chamber (18) and the air guide pipe (14).

7. The laboratory air quality control device according to claim 4, characterized in that: A sealing gasket (23) is fixed to one end of the air intake pipe (2) and the sliding pipe (19) is located inside the air intake pipe (2), and the sealing gasket (23) is used to seal the sliding pipe (19) and the air intake pipe (2).

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