Photochemical smog chamber

Abstract

The photochemical smog box comprises a box body, an opening is formed in the top of the box body, a cover body matched with the opening is arranged at the top of the box body, a lifting platform, an air inlet pipe and an air outlet pipe are arranged in the box body, the lifting platform can move in the height direction, and a reactor is arranged on the lifting platform; the reactor comprises a reaction chamber defined by materials with light-transmitting characteristics, the air inlet pipe and the air outlet pipe are both communicated with the reaction chamber, an artificial light source is arranged in the box body, when the photochemical smog box serves as an indoor smog box, the cover body covers the box body to form a closed space, the artificial light source is turned on to simulate sunlight, and the photochemical smog box is formed. When simulated light irradiates into the reactor and needs to be used as an outdoor smog chamber, the cover body is opened, and the lifting platform drives the reactor to rise to a preset position, so that the reactor is completely exposed to sunlight, the sunlight cannot be shielded by the side wall of the chamber body, and the actual sunlight is switched to be used as a light source; therefore, an outdoor smog chamber experiment under actual sun illumination can be carried out.

Description

Technical Field

[0001] The present application is used in the field of air pollution prevention technology, and in particular relates to a photochemical smog box. Background Art

[0002] The photochemical smog chamber experiment is an effective means to study the causes of atmospheric photochemical secondary pollution and then formulate efficient pollution prevention and control countermeasures. The smog chamber system is an important platform for conducting experiments. The photochemical reactions in the atmosphere are complex, and many factors will affect the progress and results of atmospheric photochemical reactions. The use of a smog chamber can accurately control one or several variables, such as light intensity, light distribution, temperature, humidity, reaction time, or adjust the type, concentration and order of addition of reactants, and use supporting instruments to monitor and analyze the impact of the variable on the photochemical reaction and the generation of secondary pollutants, and then conduct in-depth research on the atmospheric chemical mechanism to provide support for the scientific prevention and control of secondary atmospheric pollution.

[0003] Smoke chambers can be divided into indoor smoke chamber systems and outdoor smoke chamber systems according to the location of their reactors and the types of light sources. Indoor and outdoor smoke chamber systems each have their own advantages and disadvantages and are suitable for different research tasks.

[0004] Indoor smoke chambers use artificial light as the reaction light source, and the reaction temperature can be adjusted manually. During the experiment, repeated experiments can be carried out by artificially controlling the spectral intensity, spectral distribution and temperature. However, the spectrum and intensity of artificial light cannot completely match those of natural light, which introduces uncertainty into the determination of photochemical reaction rates, resulting in deviations between simulation results and actual results. The reactor of the outdoor smoke chamber is completely exposed to sunlight. The light intensity and photochemical flux in the reactor change with time and season. Simulation experiments that are completely consistent with actual sunlight can be carried out, but it is difficult to conduct repeated experiments.

[0005] In actual research work, on the one hand, researchers hope to use indoor smoke chamber systems to conduct repetitive experiments under controlled artificial light intensity to explore the impact of single factor changes on secondary pollution generation and form a regular understanding; on the other hand, researchers also hope to use outdoor smoke chamber systems to conduct experiments under actual sunlight to analyze the secondary generation mechanism of the atmosphere under conditions closest to actual conditions. However, currently they mainly use indoor smoke chamber systems or outdoor smoke chamber systems with single functions, and their application scenarios also have certain limitations. Utility Model Content

[0006] The purpose of the present application is to solve at least one of the technical problems existing in the prior art and to provide a photochemical smog chamber that can be used as an indoor smog chamber for simulation experiments and can also be used as an outdoor smog chamber for simulation experiments.

[0007] The technical solution adopted by this application to solve its technical problem is:

[0008] A photochemical smog box comprises a box body, the top of which is provided with an opening, the top of which is provided with a cover body matching the opening, a lifting platform, an air inlet pipe and an air outlet pipe provided in the box body, the lifting platform can move in a height direction, a reactor is provided on the lifting platform, the reactor comprises a reaction chamber surrounded by a material having a light-transmitting property, the air inlet pipe and the air outlet pipe are both connected to the reaction chamber, and an artificial light source is provided in the box body.

[0009] Preferably, the material having light-transmitting properties comprises a polytetrafluoroethylene film, the reactor comprises a frame, and the edge of the polytetrafluoroethylene film is clamped and fixed on the frame.

[0010] Preferably, the cover body is slidably connected to the box body, a slide rail is installed on the side of the cover body, a pulley is provided on the top of the box body, the pulley is embedded in the slide rail, and the slide rail is arranged along the length direction of the cover body.

[0011] Preferably, a first gear is provided inside the cover body, a second gear meshing with the first gear is provided on the box body, and a first driving device for driving the second gear to rotate is provided on the box body.

[0012] Preferably, the first driving device comprises a first motor mounted on the housing, and the second gear is arranged on a transmission rod of the first motor.

[0013] Preferably, a second driving device is installed in the box body, and a chain is connected to the lifting platform. The second driving device can control the lifting movement of the lifting platform by driving the chain to move.

[0014] Preferably, a support frame is provided in the box body, a first sprocket meshing with the chain is provided at the top end of the support frame, a first transmission shaft is provided at the bottom end of the support frame, a second sprocket meshing with the chain is provided on the first transmission shaft, buckles for fixing the chain are provided at the four corners of the lifting platform, and the chain is connected to the four corners of the lifting platform.

[0015] Preferably, the support frame is provided with a first sensor and a second sensor, the first sensor is correspondingly arranged at the height of the highest stroke of the lifting platform, and the second sensor is correspondingly arranged at the height of the lowest stroke of the lifting platform, the first sensor and the second sensor are both connected to the second driving device, and when the lifting platform rises to the highest stroke position or descends to the lowest stroke position, the second driving device locks the lifting platform.

[0016] Preferably, a base is provided on the bottom surface of the box body, the support frame is installed on the base, the second driving device includes a second motor installed at the middle position of the base, the second motor and the first transmission shaft are connected through a second transmission shaft, the first transmission shaft is arranged along the width direction of the box body, and the second transmission shaft is arranged along the length direction of the box body.

[0017] Preferably, a heat-insulating layer is provided on the outer side of the box, a reflective layer is provided on the inner side of the box, and the artificial light source comprises a black light lamp installed on the inner side wall of the box.

[0018] One of the above technical solutions has at least one of the following advantages or beneficial effects: the photochemical smog box can be used as an indoor smog box for simulation experiments, and can also be used as an outdoor smog box for simulation experiments. Different gases can be introduced into the reactor through the air inlet pipe, and the air outlet pipe is used to exhaust gas to ensure that a stable air pressure is maintained in the reactor. When used as an indoor smog box, the cover body is closed on the box body to form a closed space, and the artificial light source is turned on to simulate sunlight, and the simulated light is irradiated into the reactor. When it is needed to be used as an outdoor smog box, the cover body is opened, and the lifting platform drives the reactor to a preset position, so that the reactor is completely exposed to sunlight, and the sunlight will not be blocked by the side walls of the box body, so as to switch to actual sunlight as the light source to conduct an outdoor smog box experiment under actual sunlight. The photochemical smog box can be switched between indoor and outdoor smog boxes, and can better reveal the secondary pollution of the atmosphere through repeated indoor and outdoor experiments, serving the scientific prevention and control of secondary pollution.

[0019] Additional aspects and advantages of the present application will be given in part in the description below, and in part will become apparent from the description below, or will be learned through the practice of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The above and / or additional aspects and advantages of the present application will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0021] Figure 1 It is one of the three-dimensional diagrams of an embodiment of the present application;

[0022] Figure 2 This is the second stereogram of an embodiment of the present application;

[0023] Figure 3 It is a structural schematic diagram of a lifting platform according to an embodiment of the present application;

[0024] Figure 4 It is a structural schematic diagram of a cover body according to an embodiment of the present application;

[0025] Figure 5It is a schematic diagram of the connection structure between the cover body and the box body of one embodiment of the present application. DETAILED DESCRIPTION

[0026] This section will describe in detail the specific embodiments of the present application. The preferred embodiments of the present application are shown in the accompanying drawings. The purpose of the accompanying drawings is to supplement the description of the text part of the specification with graphics, so that people can intuitively and vividly understand each technical feature and the overall technical solution of the present application, but it cannot be understood as a limitation on the scope of protection of the present application.

[0027] In the present application, if there is a description of directions (up, down, left, right, front and back), it is only for the convenience of describing the technical solution of the present application, and does not indicate or imply that the technical features referred to must have a specific orientation, be constructed and operate in a specific orientation. Therefore, it cannot be understood as a limitation on the present application.

[0028] In this application, "several" means one or more, "multiple" means more than two, "greater than", "less than", "exceed" and the like are understood to exclude the number itself; "above", "below", "within" and the like are understood to include the number itself. In the description of this application, if there is a description of "first" or "second", it is only used for the purpose of distinguishing technical features, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features or implicitly indicating the order of the indicated technical features.

[0029] In this application, unless otherwise clearly defined, the words "set", "install", "connect" and the like should be understood in a broad sense, for example, they can be directly connected or indirectly connected through an intermediate medium; they can be fixedly connected, detachably connected, or integrally formed; they can be mechanically connected, electrically connected, or able to communicate with each other; they can be the internal connection of two elements or the interaction relationship between two elements. Those skilled in the art can reasonably determine the specific meanings of the above words in this application in combination with the specific content of the technical solution.

[0030] in, Figure 1 and Figure 2 The reference direction coordinate system of the embodiment of the present application is given. Figure 1 and Figure 2 The embodiments of the present application are described with reference to the direction shown.

[0031] With the continuous deepening of air pollution prevention and control efforts, the emission of primary pollutants including particulate matter, sulfur dioxide and nitrogen oxides has been effectively controlled, but secondary pollution represented by ozone has gradually become a bottleneck affecting the continuous improvement of air quality. Secondary pollutants are generated by complex chemical reactions of primary pollutants emitted from various sources under light, including ozone, secondary organic aerosols, aldehydes, ketones and oxygen-containing substances. The generation of secondary pollutants in the actual atmosphere is closely related to factors such as emissions, reactions, meteorology, and regional transmission. Among them, photochemical reactions determine the transformation path and rate of primary pollutants to secondary pollutants. Therefore, clarifying the photochemical conversion mechanism can provide a theoretical basis for the prevention and control of secondary pollution.

[0032] The embodiment of the present application provides a photochemical smog chamber, see Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 5 , including a box body 100, the top of the box body 100 is provided with an opening, the top of the box body 100 is provided with a cover body 200 matching the opening, the box body 100 is provided with a lifting platform 300, an air inlet pipe 400 and an air outlet pipe 500, the lifting platform 300 can move in the height direction, the lifting platform 300 is provided with a reactor 600, the reactor 600 includes a reaction chamber formed by a material with light-transmitting properties, the air inlet pipe 400 and the air outlet pipe 500 are both connected to the reaction chamber, an artificial light source is provided in the box body 100, the photochemical smog box can be used as an indoor smog box for simulation experiments, and can also be used as an outdoor smog box for simulation experiments, and the air inlet pipe 400 can be used to Different gases can be introduced into the reactor 600, and the gas outlet pipe 500 is used to connect an instrument for real-time monitoring of the progress of the photochemical reaction in the reactor. When used as an indoor smoke box, the cover 200 is covered on the box 100 to form a closed space, and the artificial light source is turned on to simulate sunlight, and the simulated light irradiates into the reactor 600; when it is needed to be used as an outdoor smoke box, the cover 200 is opened, and the lifting platform 300 drives the reactor 600 to rise to a preset position, so that the reactor 600 is completely exposed to sunlight, and the sunlight will not be blocked by the side wall of the box 100, so as to switch to actual sunlight as the light source to conduct an outdoor smoke box experiment under actual sunlight.

[0033] The photochemical smog chamber can be switched between an indoor smoke chamber and an outdoor smoke chamber, and can better reveal the secondary pollution of the atmosphere through the combination of indoor smoke chamber experiments and outdoor smoke chamber experiments, so as to serve the scientific prevention and control of secondary pollution. The present application provides a comprehensive smoke chamber simulation system that can be switched between indoor and outdoor, which highly integrates the advantages of the indoor smoke chamber system and the outdoor smoke chamber, and can better reveal the secondary pollution of the atmosphere through the combination of indoor smoke chamber experiments and outdoor smoke chamber experiments, so as to serve the scientific prevention and control of secondary pollution.

[0034] Specifically, the reactor 600 is fixed on the lifting platform 300 through a spring shock absorber.

[0035] Preferably, the reactor 600 includes a frame 610, and the light-transmitting material includes a polytetrafluoroethylene film 620, and the edge of the polytetrafluoroethylene film 620 is clamped and fixed on the frame 610. Specifically, the polytetrafluoroethylene film 620 with the light-transmitting material encloses a cylindrical reaction chamber, and the polytetrafluoroethylene film 620 at the circular edge of the reaction chamber is fixed to the frame 610 by clamping. The frame 610 is a stainless steel frame, and the lower part of the frame 610 is fixed to the lifting platform 300. By moving the lifting platform 300 up and down, the reactor 600 is moved in the box 1 00 moves vertically inside and outside. Polytetrafluoroethylene film is a polymer material with stable physical and chemical properties. It has good light transmittance and is not easy to react with other substances. The use of polytetrafluoroethylene film to enclose a closed cylindrical reaction chamber can, on the one hand, improve the light transmittance. In the outdoor smoke box experiment, more sunlight can pass through the polytetrafluoroethylene film into the reaction chamber. In the use of indoor smoke boxes, more artificial light sources can pass through the polytetrafluoroethylene film into the reaction chamber. On the other hand, the use of polytetrafluoroethylene film can reduce the wall loss of various substances and improve the reliability of experimental data.

[0036] As a preferred embodiment of the present application, the cover 200 is slidably connected to the box body 100, see Figure 4 A slide rail 220 is installed on the side of the cover body 200, and a pulley 140 is provided on the inner side of the top of the box body 100. The pulley 140 is embedded in the slide rail 220. The slide rail 220 is arranged along the length direction of the cover body 200. In other words, the slide rails 220 are installed on the front and rear sides of the cover body 200, and 3 pulleys 140 are evenly installed on the front and rear sides of the upper part of the box body 100, for a total of 6 pulleys 140. The 6 pulleys 140 on the front and rear sides of the top of the box body 100 are embedded in the slide rails 220 on the front and rear sides of the cover body 200.

[0037] See also Figure 5 A first gear 210 is provided on the inner side of the cover body 200, a second gear 130 meshing with the first gear 210 is provided on the box body 100, and a first driving device 140 for driving the second gear 130 to rotate is provided on the box body 100. Specifically, the first gear 210 is a spur gear, and the second gear 130 is a circular gear.

[0038] In some embodiments, the first driving device 140 includes a first motor 141 installed on the box body 100, and the second gear 130 is arranged on the transmission rod 142 of the first motor and rotates with the motor; the two circular gears are meshed with two spur gears installed on the inner side of the cover body 200. When the first motor 141 rotates, it drives the circular gears to rotate, and then drives the cover body 200 to move horizontally left and right. When the cover body 200 moves left and right, the six pulleys embedded in the slide rail slide, which on the one hand makes the horizontal movement of the cover body left and right smoother, and on the other hand prevents the cover body 200 from tipping over.

[0039] As a preferred embodiment of the present application, a second driving device is installed in the box 100, and a chain 310 is connected to the lifting platform 300. The second driving device can control the lifting movement of the lifting platform 300 by driving the chain 310 to move.

[0040] See also Figure 3 A support frame 320 is provided in the box body 100, and a first sprocket engaged with the chain 310 is provided at the top of the support frame 320, and a first transmission shaft 330 is provided at the bottom of the support frame 320. A second sprocket engaged with the chain 310 is also provided at a corresponding position on the first transmission shaft 330. Buckles for connecting with the chain 310 are provided at the four corners of the lifting platform 300. The chain 310 is connected to the four corners of the lifting platform 300 through the buckles. Four chains 310 are provided accordingly, and the chains 310 bypass the high end of the support frame 320 respectively. The first sprocket and the second sprocket on the first transmission shaft 330 form a closed connection. The first transmission shaft 330 is connected to the four lifting chains via a lifting reducer. The second driving device drives the four chains 310 to move synchronously through the first transmission shaft 330 via the lifting reducer, so that the liftable platform 300 rises or falls. The second driving device drives the second sprocket on the first transmission shaft 330 to rotate, thereby driving the movement of the chain 310 and the vertical movement of the lifting platform 300, thereby realizing the switching between the indoor smoke box system and the outdoor smoke box system.

[0041] As a preferred embodiment of the present application, a first sensor 321 and a second sensor 322 are provided on the support frame 320. The first sensor 321 is correspondingly arranged at the height of the highest stroke of the lifting platform 300, and the second sensor 322 is correspondingly arranged at the height of the lowest stroke of the lifting platform 300. The first sensor 321 and the second sensor 322 are both connected to the second driving device. When the lifting platform 300 rises to the highest stroke position or descends to the lowest stroke position, the second driving device locks the lifting platform 300.

[0042] See also Figure 3A base 110 is provided on the inner bottom surface of the connected box 100, the support frame is installed on the base 110, the second driving device includes a second motor 340 installed at the middle position of the base 110, the second motor 340 is connected to the first transmission shaft 330 through a second transmission shaft 350, the first transmission shaft 330 is arranged along the width direction of the box 100, and the second transmission shaft 350 is arranged along the length direction of the box 100. Specifically, the first inductor 321 and the second inductor 322 are both electromagnetic inductors. When the liftable platform 300 When it rises to be parallel to the first sensor 321, the electromagnetic sensor senses, the second motor 340 is powered off and locked, and the lifting platform 300 stops at the highest point; when the lifting platform 300 descends to be parallel to the second sensor 322, the electromagnetic sensor senses, the second motor 340 is powered off and locked, and the lifting platform 300 stops at the lowest point, between the first sensor 321 and the second sensor 322. The second motor 340 can be started and stopped manually to make the lifting platform 300 stop at any height between the first sensor 321 and the second sensor 322.

[0043] When the photochemical smog box is switched from an indoor smog box to an outdoor smog box, the first motor rotates forward, driving the two circular gears to rotate. The two circular gears mesh with the two spur gears installed on the inner side of the cover 200. After the two circular gears rotate, they drive the cover to open. During the opening of the cover, the six pulleys embedded in the slide rails on the front and rear sides of the cover rotate with the movement of the cover, which makes the cover smoother when opening on the one hand, and prevents the cover from tipping over on the other hand. When the cover is opened to the preset position, the first motor stops working and the cover stops moving. Thereafter, the second motor starts to rotate forward, driving the four chains to move through the first transmission shaft, and the lifting platform rises, thereby gradually raising the reactor to the outside of the box cabin; when the lifting platform rises to be parallel to the upper electromagnetic inductor, the electromagnetic inductor senses, the second motor is powered off and locked, and the reactor rises to the preset position, realizing the switch from an indoor smog box to an outdoor smog box.

[0044] As a preferred embodiment of the present application, the outer side of the box body 100 is provided with an insulation layer. Specifically, the box body 100 is made of an insulation sandwich panel, and the inner side of the box body 100 is provided with a reflective layer. When the cover body 200 and the box body 100 are covered, the six inner sides of the whole are provided with reflective mirror panels. Figure 1 and Figure 2 The artificial light source includes a black light lamp 120 installed on the inner wall of the box 100. Specifically, there are 4 rows of 36 black light lamps on the front wall of the cabin, and 4 rows of 36 black light lamps on the rear inner wall. The layout of the black light lamps on the front and rear walls of the box 100 is exactly the same to ensure that the reactor 600 can receive uniform ultraviolet radiation. When used as an indoor smoke box working scenario, black light lamps are used as artificial light sources, and a temperature and humidity system is used to control the temperature and humidity in the cabin.

[0045] The reactor 600 is connected to eight inlet pipes 400 in the middle of the lower part, and different gases can be introduced into the reactor 600. The eight inlet pipes 400 are placed in a retractable metal hinge pipe, and the upper part of the hinge pipe is fixed to the lifting platform 300. When the lifting platform 300 moves, the hinge pipe and the internal inlet pipe 400 can be driven to move vertically synchronously. There are eight outlet pipes 500 in the middle of the front and back of the reactor 600, and the eight outlet pipes 500 are also placed in a retractable metal hinge pipe. The upper part of the hinge pipe is fixed to the middle part of the reactor 600 frame. When the lifting platform 300 moves, the hinge pipe and the internal inlet pipe 400 can be driven to move vertically synchronously.

[0046] Preferably, a temperature and humidity sensor is installed in the middle of the bottom of the reactor 600. When the reactor 600 is used as an indoor smoke box, the temperature and humidity sensor is connected to the constant temperature and humidity air conditioning unit. The constant temperature and humidity air conditioning unit can control the temperature and humidity in the reactor through data feedback from the temperature and humidity sensor. When the reactor is used as an outdoor smoke box, the temperature and humidity sensor is used to monitor the temperature and humidity in the reactor. At the same time, a turbulent fan is installed in the reactor to accelerate the mixing rate of pollutants in the reactor.

[0047] The reactor 600 includes an air introduction module, and the actual air introduction module includes an air pump and an air pipe flowmeter. The air pipe can introduce actual air into the reactor 600 through the air pump and the flowmeter. Specifically, the flowmeter is located between the reactor 600 and the air pump, and the air pump is arranged on the air pipe. In some embodiments, the rate of introducing actual air into the reactor 600 can be controlled by adjusting the flow of the flowmeter, and air pumps with different flow ranges can be used according to actual needs.

[0048] In the description of this specification, the description with reference to the terms "example", "embodiment" or "some embodiments" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0049] Of course, the invention is not limited to the above-mentioned embodiments, and those skilled in the art may make equivalent modifications or substitutions without violating the spirit of the present application, and these equivalent modifications or substitutions are all included in the scope defined by the claims of the present application.

Claims

1. A photochemical smog chamber, characterized in that: It includes a box body, the top of which is provided with an opening, the top of which is provided with a cover body matching the opening, the box body is provided with a lifting platform, an air inlet pipe and an air outlet pipe, the lifting platform can move along the height direction, the lifting platform is provided with a reactor, the reactor includes a reaction chamber surrounded by a material with light-transmitting properties, the air inlet pipe and the air outlet pipe are both connected to the reaction chamber, and the box body is provided with an artificial light source.

2. The photochemical smog chamber according to claim 1, characterized in that: The light-transmitting material comprises a polytetrafluoroethylene film, the reactor comprises a frame, and the edge of the polytetrafluoroethylene film is clamped and fixed on the frame.

3. The photochemical smog chamber according to claim 1, characterized in that: The cover body is slidably connected to the box body, a slide rail is installed on the side of the cover body, a pulley is provided on the top of the box body, the pulley is embedded in the slide rail, and the slide rail is arranged along the length direction of the cover body.

4. The photochemical smog chamber according to claim 1, characterized in that: A first gear is disposed inside the cover body, a second gear meshing with the first gear is disposed on the box body, and a first driving device for driving the second gear to rotate is disposed on the box body.

5. The photochemical smog chamber according to claim 4, characterized in that: The first driving device comprises a first motor mounted on the box body, and the second gear is arranged on a transmission rod of the first motor.

6. The photochemical smog chamber according to claim 1, characterized in that: A second driving device is installed in the box body, and a chain is connected to the lifting platform. The second driving device can control the lifting movement of the lifting platform by driving the chain to move.

7. The photochemical smog chamber according to claim 6, characterized in that: A support frame is provided in the box body, a first sprocket engaged with the chain is provided at the top of the support frame, a first transmission shaft is provided at the bottom of the support frame, a second sprocket engaged with the chain is provided on the first transmission shaft, buckles for fixing the chain are provided at the four corners of the lifting platform, and the chain is connected to the four corners of the lifting platform.

8. The photochemical smog chamber according to claim 7, characterized in that: The support frame is provided with a first sensor and a second sensor, the first sensor is correspondingly arranged at the height of the highest stroke of the lifting platform, and the second sensor is correspondingly arranged at the height of the lowest stroke of the lifting platform, the first sensor and the second sensor are both connected to the second driving device, when the lifting platform rises to the highest stroke position or descends to the lowest stroke position, the second driving device locks the lifting platform.

9. The photochemical smog chamber according to claim 7 or 8, characterized in that: A base is provided on the bottom surface of the box body, the support frame is installed on the base, the second driving device includes a second motor installed at the middle position of the base, the second motor is connected to the first transmission shaft through a second transmission shaft, the first transmission shaft is arranged along the width direction of the box body, and the second transmission shaft is arranged along the length direction of the box body.

10. The photochemical smog chamber according to claim 1, characterized in that: The outer side of the box body is provided with a heat preservation layer, the inner side of the box body is provided with a reflective layer, and the artificial light source comprises a black light lamp installed on the inner side wall of the box body.

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