Plasma air purifier flow channel structure applied to laboratory and control method

Abstract

This invention relates to the field of projection equipment technology and discloses a flow channel structure for a plasma air purifier used in laboratories. The structure includes a housing, which contains: an air intake pretreatment zone located inside the housing for gas adsorption pretreatment; a stepped flow guiding filter channel located above and connected to the air intake pretreatment zone; an airflow homogenization and diversion zone located above and connected to the stepped flow guiding filter channel, which diverts the gas from the stepped flow guiding filter channel; and a three-channel diversion purification system connected to the stepped flow guiding filter channel via the airflow homogenization and diversion zone. A control method is also disclosed, comprising the following steps: S1, environmental parameter sensing; S2, intelligent diversion control; and S3, coordinated regulation of purification modules. This invention achieves efficient treatment of complex pollutants in laboratories through layered purification, intelligent diversion, and modular design.

Description

Technical Field

[0001] This invention relates to the field of air purification equipment technology, and in particular to the flow channel structure and control method of a plasma air purifier for laboratory use. Background Technology

[0002] As the core location for scientific research and experimentation, the air quality in laboratories directly affects experimental precision, equipment lifespan, and personnel health. Laboratory air often contains particulate, chemical, and biological pollutants. Traditional air purification equipment faces the following technical bottlenecks: Insufficient efficiency of single purification modes: Traditional purifiers often use a simple combination of "pre-filter + activated carbon adsorption," which has limited capacity to handle complex laboratory pollutants (such as high-concentration organic waste gas and nano-sized particles). For example, a single HEPA filter has reduced interception efficiency for particles smaller than 0.1μm, and activated carbon needs frequent replacement after becoming saturated with low-concentration odors. Chinese patent CN202123389U discloses a laboratory air purifier using a combination of "filtration + ultraviolet sterilization," but its capacity to handle complex laboratory pollutants is limited, and its capacity to handle chemical pollutants is insufficient. Uneven airflow distribution leads to purification dead zones: Existing equipment often uses a straight-through flow channel design, causing airflow to concentrate in the center of the pipe, while the flow velocity in the edge areas is low. This results in uneven filter utilization and makes it difficult to form a uniform laminar flow, affecting the requirements of a precision experimental environment.

[0003] Therefore, it is necessary to provide a flow channel structure and control method for plasma air purifiers used in laboratories to solve the above-mentioned technical problems. Summary of the Invention

[0004] The purpose of this invention is to provide a flow channel structure and control method for a plasma air purifier used in laboratories, so as to solve the existing problems in the background art.

[0005] To achieve the above objectives, the present invention provides the following technical solution:

[0006] The flow channel structure of a plasma air purifier for laboratory use includes

[0007] The intake pretreatment zone, located inside the outer casing, performs adsorption pretreatment on the gas.

[0008] A stepped flow guide filter channel is located above the intake pretreatment area and is connected to the intake pretreatment area;

[0009] The airflow homogenization and diversion zone is located above the stepped guide filter channel and is connected to the stepped guide filter channel. The airflow homogenization and diversion zone diverts the gas from the stepped guide filter channel.

[0010] The three-channel diversion purification system connects the airflow homogenization and diversion area with the stepped flow guide filtration channel. After the airflow is diverted by the airflow homogenization and diversion area, the gas flows out of the outer shell after being purified by the three-channel diversion purification system.

[0011] As a further embodiment of the present invention, the air intake pretreatment zone includes a pretreatment section, which has an air inlet, a drive chamber, a diffuser chamber and an air outlet. The air inlet is connected to the drive chamber through an air inlet pipe, and the drive chamber is connected to the diffuser chamber through an air inlet. A mounting shaft is horizontally installed in both the drive chamber and the diffuser chamber. A turbine blade and a spiral guide blade are mounted on the mounting shaft, with the turbine blade located in the drive chamber and the spiral guide blade located in the diffuser chamber. An activated carbon coating is provided on the inner wall of the diffuser chamber.

[0012] As a further embodiment of the present invention, the stepped flow guiding filter channel is vertically arranged above the intake pretreatment area. The stepped flow guiding filter channel is divided into a coarse filter layer and a medium filter layer from bottom to top. The coarse filter layer is provided with a coarse filter guide plate, and the medium filter layer is provided with a medium filter guide plate. The coarse filter guide plate and the medium filter guide plate are staggered and inclined in the stepped flow guiding filter channel.

[0013] As a further embodiment of the present invention, the coarse filter guide plate includes a coarse filter support and a coarse filter part, wherein the coarse filter support is a solid plate and the coarse filter part is a metal mesh.

[0014] As a further embodiment of the present invention, the left and right sides of the intermediate filter guide plate are respectively the intermediate filter support part and the intermediate filter filtration part, wherein the intermediate filter filtration part is made of non-woven fabric and activated carbon, and is used to treat fine particles and harmful gases.

[0015] As a further embodiment of the present invention, the airflow homogenization and diversion zone is divided into a homogenization zone and a diversion zone by a partition, and the homogenization zone is located above the stepped flow guiding filter channel. The diversion zone is parallel to the stepped flow guiding filter channel. The homogenization zone includes a flow equalization plate. A main flow pipe is vertically arranged in the diversion zone. The upper end of the main flow pipe is provided with a bend and extends to the middle of the homogenization zone. Three diversion pipes are connected to the main flow pipe. Each diversion pipe and the main flow pipe are connected to a diversion valve.

[0016] As a further embodiment of the present invention, the three-channel diversion purification system is divided into a main purification zone, a side purification zone and a micro-purification zone from bottom to top.

[0017] The main purification zone is provided with a pre-filter, a plasma tube zone and a HEPA filter in sequence from the airflow equalization and diversion zone to the outer shell. The plasma tube zone is provided with plasma tubes arranged perpendicular to the airflow direction.

[0018] The side purification zone is filled with a gas adsorption module;

[0019] The micro-purification zone is equipped with a high-voltage plasma module.

[0020] As a further embodiment of the present invention, the three-channel diversion purification system is divided into a main purification zone, a side purification zone and a micro-purification zone from bottom to top.

[0021] The main purification zone is provided with a pre-filter, a plasma tube zone and a HEPA filter in sequence from the airflow equalization and diversion zone to the outer shell. The plasma tube zone is provided with plasma tubes arranged perpendicular to the airflow direction.

[0022] The side purification zone is filled with a gas adsorption module;

[0023] The micro-purification zone is equipped with a high-voltage plasma module.

[0024] A control method, applied to the flow channel structure of a laboratory plasma air purifier, includes the following steps:

[0025] S1. Environmental parameter sensing: Through sensor arrays set in each functional area of ​​the outer shell, real-time data such as gas flow rate and pollutant concentration in the intake pretreatment zone, pressure difference between the front and rear ends of the stepped flow filtration channel, and purified gas composition in each channel of the three-channel diversion purification system are collected.

[0026] S2. Intelligent diversion control: The central controller dynamically adjusts the opening of the diversion valve in the airflow equalization diversion zone based on sensor data and the type and concentration of pollution, and distributes the gas to the main purification zone, side purification zone and micro purification zone in the optimal ratio.

[0027] S3 purification module coordinated control: Based on the processing requirements of each channel, it adaptively adjusts the voltage parameters of the ion tube area in the main purification zone and the discharge frequency and pulse width of the pulse high-voltage power supply in the micro-purification zone to optimize plasma generation efficiency.

[0028] The plasma air purifier in this laboratory utilizes a layered purification, intelligent flow diversion, and modular design to achieve highly efficient treatment of complex pollutants in the laboratory. Its inlet pretreatment zone combines centrifugal force and an activated carbon coating to pre-intercept large particles and adsorb some chemical gases, reducing the load on the downstream components. The staggered guide plates in the stepped flow-guiding filter channel form a "Z"-shaped airflow path, extending the contact time between the gas and the filter material. The airflow equalization and diversion zone eliminates turbulence through flow equalization plates and evenly distributes the gas to the three channels. The three-channel diversion purification system is independently configured with processing modules for different pollutant characteristics, achieving specialized purification. The combination of vertical gradient and horizontal flow equalization ensures purification uniformity, avoiding localized overload or purification dead zones, and the diversion valve can dynamically adjust the flow distribution ratio based on real-time pollution data. Attached Figure Description

[0029] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0030] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0031] Figure 2 This is a cross-sectional view of the present invention;

[0032] Figure 3 In this invention Figure 1 A schematic diagram of the pretreatment section in its cross-sectional state.

[0033] Figure 4 This is a schematic diagram of the intake pretreatment zone in this invention;

[0034] Figure 5 In this invention Figure 4 A schematic diagram of the structure after removing the turbine blades and helical guide vanes;

[0035] Figure 6 This is a schematic diagram of the turbine blades and helical guide vanes in this invention;

[0036] Figure 7 This is a schematic diagram of the stepped flow guiding filter channel and the airflow homogenization and diversion zone in this invention;

[0037] Figure 8 This is a schematic diagram of the installation state of the coarse filter guide plate and the medium filter guide plate in this invention.

[0038] Figure 9 This is a schematic diagram of the three-channel diversion purification system in this invention;

[0039] Figure 10 This is a schematic diagram of the micro-purification zone in this invention.

[0040] In the diagram: 1. Outer casing; 2. Inlet pretreatment zone; 201. Pretreatment section; 2011. Inlet; 2012. Drive chamber; 2013. Diverging chamber; 2014. Outlet; 2015. Inlet pipe; 2016. Turbine blade; 2017. Spiral guide vane; 2018. Activated carbon coating; 2019. Inlet; 3. Stepped flow guide filter channel; 301. Coarse filter layer; 3011. Coarse filter guide plate; 302. Medium filter layer; 3021. Medium filter guide plate; 4. Airflow homogenization and distribution zone; 401. Partition, 402 equalization zone, 4021 flow equalization plate, 403 flow distribution zone, 4031 main flow pipe, 4032 flow distribution valve, 4033 flow distribution pipe, 5 three-channel flow distribution purification system, 501 main purification zone, 5011 primary filter, 5012 plasma tube zone, 5013 HEPA filter, 502 side purification zone, 5021 gas adsorption module, 503 micro purification zone, 5031 diameter reduction section, 5032 high-pressure plasma zone, 5033 diameter expansion section, 6 louvered air vents. Detailed Implementation

[0041] refer to Figure 1 —10, a plasma air purifier flow channel structure for laboratory applications, including a housing 1, wherein the housing 1 includes:

[0042] like Figure 1-6 As shown, the intake pretreatment zone 2 is located inside the outer shell 1 to perform adsorption pretreatment of the gas. The intake pretreatment zone 2 includes a pretreatment section 201, which is located on the inner bottom wall of the outer shell 1. The pretreatment section 201 has an intake port 2011, a drive chamber 2012, a diffuser chamber 2013, and an outlet 2014. The intake port 2011 extends to the outside of the outer shell 1 and communicates with the outside. The outlet 2014 is connected to the stepped guide filter channel 3. The intake port 2 has a gradually decreasing diameter. The intake port 2011 is connected to the drive chamber 2012 through the intake pipe 2015. The drive chamber 2012 is connected to the diffuser chamber 2013 through the inlet port 2019. The centerline of the drive chamber 2012 is aligned with the centerline of the diffuser chamber 2013. The drive chamber 2012 and the expanding chamber 2013 are horizontally mounted with a common mounting shaft. The mounting shaft is equipped with a turbine blade 2016 and a spiral guide blade 2017. The turbine blade 2016 is located inside the drive chamber 2012. The intake pipe 2015 is tangentially set on the drive chamber 2012. The turbine blade 2016 and the inner wall of the drive chamber 2012 maintain a gap of 0.5-1mm to avoid friction and ensure airflow driving efficiency. The spiral guide blade 2017 is located inside the expanding chamber 2013. The spiral guide blade 2017 and the inner wall of the expanding chamber 2013 maintain a gap of 1-2mm. It achieves passive rotation by airflow to enhance the spiral guiding effect. The inner wall of the expanding chamber 2013 is provided with an activated carbon coating 2018.

[0043] A blower is installed at the front end of the air inlet 2011 of the air inlet pretreatment zone 2. It is connected to the flange of the air inlet 2011 through a pipe. A rubber sealing ring is set at the connection to ensure airtightness. The outlet pipe of the blower is connected to the air inlet 11 of the air inlet pretreatment zone 2 to provide airflow driving force for the entire purification system, so that the outside air enters the air inlet pretreatment zone 2 for subsequent treatment after being pressurized by the blower.

[0044] like Figure 7-8As shown, the stepped flow guide filter channel 3 is located above and connected to the intake pretreatment zone 2. The stepped flow guide filter channel 3 is vertically positioned above the intake pretreatment zone 2. From bottom to top, the stepped flow guide filter channel 3 is divided into a coarse filter layer 301 and a medium filter layer 302. At least one coarse filter guide plate 3011 is provided in the coarse filter layer 301, and at least one medium filter guide plate 3021 is provided in the medium filter layer 302. The coarse filter guide plates 3011 and 3021 are staggered and inclined within the stepped flow guide filter channel 3. The left and right sides of the coarse filter guide plate 3011 are respectively a coarse filter support and a coarse filter section. The coarse filter support is a solid plate, and the coarse filter section is a metal mesh used to intercept large particles. The part closest to the air outlet 2014... The coarse filter guide plate 3011 is set with a right-high and left-low tilt (solid plate on the right, metal mesh on the left), so that the airflow passes through the metal mesh on the left. The solid plate is located above the right of the air outlet 2014, guiding the airflow to first hit the solid plate and then pass through the filter material. The remaining guide plates are arranged alternately. The left and right sides of the middle filter guide plate 3021 are the middle filter support and the middle filter filtration part, respectively. Its tilt direction continues the staggered arrangement of the coarse filter guide plate 3011. The tilt angle of the middle filter guide plate 3021 is the same as that of the coarse filter guide plate 3011 (e.g., both are 45°), and the tilt directions of adjacent guide plates are opposite, forming a 'Z' shaped airflow path. Its tilt direction continues the staggered logic of the coarse filter guide plate 3011. The middle filter filtration part is made of non-woven fabric and activated carbon, used to treat fine particles and harmful gases.

[0045] The airflow homogenization and diversion zone 4 is located above and connected to the stepped flow guide filter channel 3. The airflow homogenization and diversion zone 4 diverts the gas in the stepped flow guide filter channel 3. The airflow homogenization and diversion zone 4 is divided into a homogenization zone 402 and a diversion zone 403 by a partition 401. The homogenization zone 402 is located above the stepped guide filter channel 3, and the diversion zone 403 is parallel to the stepped guide filter channel 3. The homogenization zone 402 includes a flow equalization plate 4021, which has several ventilation holes. The flow equalization plate 4021 is located above the uppermost middle filter guide plate 3021. A main flow pipe 4031 is vertically arranged in the diversion zone 403. The upper end of the main flow pipe 4031 is bent and extends horizontally to the middle of the homogenization zone 402 to ensure that the homogenized airflow enters the main flow pipe 4031 in a horizontal direction, avoiding turbulence caused by vertical impact. Three diversion pipes 4033 are connected to the main flow pipe 4031. Each diversion pipe 4033 and the main flow pipe 4031 are connected by a diversion valve 4032.

[0046] like Figure 9-10As shown, the three-channel diversion purification system 5 is connected to the stepped flow guide filter channel 3 through the airflow equalization and diversion zone 4. After the gas is diverted through the airflow equalization and diversion zone 4, it is purified by the three-channel diversion purification system 5 and then flows out of the outer shell 1. The three-channel diversion purification system 5 is divided into a main purification zone 501, a side purification zone 502 and a micro purification zone 503 from bottom to top, and the three diversion pipes 4033 are connected to the main purification zone 501, the side purification zone 502 and the micro purification zone 503 respectively.

[0047] The main purification zone 501 is provided with a pre-filter 5011, a plasma tube zone 5012 and a HEPA filter 5013 in sequence from the airflow equalization and diversion zone 4 to the outer shell 1. The plasma tube zone 5012 is provided with plasma tubes arranged perpendicular to the airflow direction. Adjacent plasma tubes are staggered to enhance the decomposition efficiency of pollutants.

[0048] The side purification zone 502 is filled with a gas adsorption module 5021;

[0049] The micro-cleaning zone 503 is equipped with a high-voltage plasma module, which includes a narrowing section 5031, a high-voltage plasma zone 5032, and an expanding section 5033. The plasma zone 5032 is connected to a plasma discharge motor via a pulsed high-voltage power supply.

[0050] The outer casing 1 is equipped with a louvered air vent 6, which covers the air outlet area of ​​the three-channel diversion purification system 5 and is used to adjust the air outlet direction and diffusion angle.

[0051] The working principle of this laboratory plasma air purifier is based on a multi-stage purification, intelligent diversion, and collaborative processing mechanism. Through the synergistic action of an airflow drive system, a pretreatment system, a gradient filtration system, and a three-channel purification system, it achieves highly efficient removal of complex pollutants in the laboratory. The following is a detailed description of its core workflow:

[0052] Airflow Drive and Pretreatment Stage: The blower located at the front end of the air intake pretreatment zone 2 generates negative pressure, drawing outside air into the system. The blower drives other air entering the air intake pretreatment zone 2. After being accelerated through the narrowing air inlet 2011, the air enters the drive chamber 2012 through the tangential air intake pipe 2015, forming a high-speed rotating airflow. This airflow drives the turbine blades 2016 to rotate, causing the coaxial spiral guide vanes 2017 to rotate synchronously within the expanding chamber 2013. The rotating airflow generates centrifugal force, throwing large particulate pollutants (such as dust and hair) towards the inner wall of the expanding chamber 2013, where they are adsorbed by the activated carbon coating 2018. At the same time, the spiral guide vanes 2017 enhance the spiral ascent of the airflow, prolonging the contact time between the gas and the coating, and improving the pretreatment efficiency.

[0053] Gradient Filtration and Flow Equalization Stage: The airflow enters vertically upward from the pretreatment zone outlet 2014 into the stepped flow-guiding filtration channel 3, first passing through the coarse filter guide plate 3011. The solid plate portion of the bottom guide plate (tilted to the right and lower to the left) guides the airflow to impact and change direction. Large particles of pollutants are deposited due to inertia, and the remaining airflow is further intercepted by the metal mesh on the left. The airflow continues to rise, forming a "Z"-shaped path through the staggered inclined medium filter guide plates 3021. The non-woven fabric intercepts fine particles, and the activated carbon layer adsorbs some volatile organic compounds and odors. The airflow after gradient filtration reaches the equalization zone 402, where it is further dispersed through the vents on the flow equalization plate 4021, eliminating turbulence and equalizing pressure. The equalized airflow then enters the main flow pipe 4031 horizontally, and is distributed to different purification channels through three branch pipes 4033 and intelligent branch valves 4032.

[0054] The three-channel synergistic purification stage: In the main purification zone 501, the airflow first passes through a G4-grade pre-filter to intercept larger residual particles. In the plasma tube zone 5012, a DC high voltage causes adjacent, staggered plasma tubes to generate a glow discharge, producing a large number of high-energy electrons and active particles, killing bacteria and viruses in the air and decomposing some organic matter. Finally, it passes through an H13-grade HEPA filter to remove byproducts and residual particles produced by the plasma reaction. In the side purification zone 502, the diversion valve 4032 introduces part of the airflow into the side purification zone 502 based on sensor feedback (such as VOCs concentration). The gas adsorption modules 5021 (such as activated carbon and molecular sieves) specifically remove organic gases such as benzene and formaldehyde, as well as acidic / alkaline pollutants, through physical adsorption and chemical catalysis. Within the micro-purification zone 503, the airflow, after entering, is first accelerated to 8-10 m / s through the narrowing section 5031, and then uniformly enters the high-voltage plasma zone 5032. A pulsed high-voltage power supply drives the discharge electrodes to generate corona discharge, producing a large number of high-energy electrons that decompose recalcitrant VOCs (such as benzene compounds) into CO2 and H2O. The widening section 5033 slows down the gas flow rate and prolongs the residence time. Excess ozone (O3) reacts and decomposes with reducing substances in this area, ensuring a low outlet concentration.

[0055] It is worth noting that the intelligent diversion valve 4032 dynamically adjusts its opening based on real-time data from sensors at the front end of each channel (such as PM2.5, VOCs, temperature and humidity) using an algorithm: when the particulate matter concentration in the main purification zone is high, the flow rate of the main channel is increased; when high concentrations of VOCs are detected, the diversion ratio of the side purification zone and the micro-purification zone is automatically increased.

[0056] It is worth noting that a gas flow rate sensor is installed near the air inlet 2011 of the pretreatment section 201 to monitor the initial flow rate of the gas entering the equipment, facilitating the adjustment of the blower speed and maintaining stable airflow within the system. Differential pressure sensors are installed at the beginning of the coarse filter layer 301 and the end of the middle filter layer 302, respectively. By monitoring the pressure difference at these two locations, the clogging status of the filter can be directly reflected. By monitoring the pressure difference between these two locations, the clogging status of the filter can be directly reflected. Particulate matter sensors, plasma concentration sensors, and comprehensive pollutant sensors are respectively installed at the front end of the pre-filter 5011 in the main purification zone 501, the middle of the plasma tube area 5012, and the rear end of the HEPA filter 5013. Chemical pollutant sensors are equipped at the inlet and outlet ends of the gas adsorption module 5021 in the side purification zone 502. Particulate matter sensors and chemical pollutant sensors are installed at the front end of the narrowing section 5031 and the rear end of the widening section 5033 in the micro-purification zone 503 to monitor changes in various pollutants in the air before and after treatment by the high-pressure plasma module.

[0057] A control method applied to the flow channel structure of a plasma air purifier includes the following steps:

[0058] S1. Environmental parameter sensing: Through the sensor array set in each functional area inside the outer shell 1, the gas flow rate and pollutant concentration in the intake pretreatment zone 2, the pressure difference between the front and rear ends of the stepped flow filtration channel 3, and the purified gas composition of each channel of the three-channel diversion purification system 5 are collected in real time.

[0059] S2. Intelligent diversion control: The central controller dynamically adjusts the opening of the diversion valve 4032 in the airflow equalization diversion zone 4 based on sensor data and the type and concentration of pollution, and distributes the gas to the main purification zone 501, the side purification zone 502 and the micro purification zone 503 in the optimal proportion.

[0060] S3 purification module coordinated control: Based on the processing requirements of each channel, the voltage parameters of the ion tube area 5012 in the main purification zone 501 and the discharge frequency and pulse width of the pulse high voltage power supply in the micro-purification zone 503 are adaptively adjusted to optimize plasma generation efficiency.

Claims

1. A plasma air purifier flow channel structure applied to a laboratory, characterized in that: The air inlet pre-treatment area is located inside the outer shell and performs adsorption pre-treatment on the gas. The stepped flow guide filtering channel is located above the air inlet pre-treatment area and communicates with the air inlet pre-treatment area. The airflow homogenization and shunt area is located above the stepped flow guide filtering channel and communicates with the stepped flow guide filtering channel, and the airflow homogenization and shunt area performs shunt treatment on the gas in the stepped flow guide filtering channel. The three-channel shunt purification system communicates with the stepped flow guide filtering channel through the airflow homogenization and shunt area, and the gas shunted through the airflow homogenization and shunt area is purified by the three-channel shunt purification system and then flows out of the outer shell. The air inlet pre-treatment area includes a pre-treatment part, an air inlet, a driving cavity, a gradually expanding cavity, and an air outlet are arranged on the pre-treatment part, the air inlet communicates with the driving cavity through an air inlet pipe, the driving cavity communicates with the gradually expanding cavity through the air inlet, an installation shaft is horizontally arranged in the driving cavity and the gradually expanding cavity, turbine blades and spiral flow guide vanes are arranged on the installation shaft, the turbine blades are located in the driving cavity, the spiral flow guide vanes are located in the gradually expanding cavity, and an activated carbon coating is arranged on the inner wall of the gradually expanding cavity.

2. The plasma air purifier flow channel structure for a laboratory according to claim 1, characterized in that: The stepped flow guide filtering channel is vertically arranged above the air inlet pre-treatment area, the stepped flow guide filtering channel is sequentially divided into a coarse filter layer and a medium filter layer from bottom to top, a coarse filter flow guide plate is arranged in the coarse filter layer, and a medium filter flow guide plate is arranged in the medium filter layer, the coarse filter flow guide plate and the medium filter flow guide plate are arranged in the stepped flow guide filtering channel in a staggered and inclined manner.

3. The plasma air purifier flow channel structure for a laboratory according to claim 1, characterized in that: The coarse filter flow guide plate includes a coarse filter support part and a coarse filter filtering part, the coarse filter support part is a solid plate, and the coarse filter filtering part is a metal mesh.

4. The plasma air purifier flow channel structure for a laboratory according to claim 3, characterized in that: The left and right sides of the medium filter flow guide plate are respectively a medium filter support part and a medium filter filtering part, the medium filter filtering part is non-woven fabric and activated carbon, and is used for treating fine particles and harmful gases.

5. The plasma air purifier flow channel structure for a laboratory according to claim 3, characterized by: The airflow homogenization and shunt area is divided into a homogenization area and a shunt area by a partition, the homogenization area is located above the stepped flow guide filtering channel, the shunt area is parallel to the stepped flow guide filtering channel, the homogenization area includes a flow uniformization plate, a main flow pipe is vertically arranged in the shunt area, the upper end of the main flow pipe is provided with a bent part and extends to the middle of the homogenization area, three shunt pipes are connected to the main flow pipe, and a shunt valve is arranged between each shunt pipe and the main flow pipe.

6. The plasma air purifier flow channel structure for a laboratory according to claim 1, characterized by: The three-channel shunt purification system is sequentially divided into a main purification area, a side purification area, and a micro-purification area from bottom to top.

7. The plasma air purifier flow channel structure for laboratories according to claim 1, characterized in that: The main purification area is sequentially provided with a primary filter screen, a plasma tube area, and a HEPA filter screen from the airflow homogenization and shunt area to the outside of the outer shell, the plasma tube area is provided with plasma tubes arranged perpendicular to the airflow direction; The side purification area is filled with a gas adsorption module; The micro-purification area is provided with a high-voltage plasma module. The high-voltage plasma module includes a reduced-diameter section, a high-voltage plasma area, and an expanded-diameter section, and the plasma area is connected with a plasma discharge motor through a pulse high-voltage power supply.

8. The plasma air purifier flow channel structure for a laboratory according to claim 7, characterized by: The method includes the following steps:

9. A control method applied to the plasma air purifier flow channel structure applied to a laboratory according to claim 8, characterized in that, S1, shunt control: distributing the gas to the main purification area, the side purification area, and the micro-purification area according to an optimal ratio; S2, purification module cooperative regulation: adaptively adjusting the parameters in the three-channel shunt purification system according to the processing requirements of each channel. ​

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