Air purification equipment for efficiently degrading volatile organic compounds through photocatalysis

Abstract

The invention discloses air purification equipment for efficient photocatalytic degradation of volatile organic compounds in the technical field of air purification, which comprises a shell, a controller is embedded in the top end of the shell, an air inlet cavity and an air outlet cavity are formed in the shell from bottom to top, an air inlet and an air outlet are formed in the surface of the shell, and concentration sensors are mounted on the inner walls of the air inlet and the air outlet. A catalytic channel is arranged in the shell, a plurality of ultraviolet lamps are installed on the inner wall of the catalytic channel, a visible light assembly is installed on the top of the shell, a filtering assembly is installed in the air outlet cavity, an air inlet fan is installed in the air inlet cavity, and a driving assembly is installed in the shell. And the controller is used for receiving the indoor light intensity data and the harmful gas concentration data, performing linkage analysis on the two data and adjusting output parameters of the ultraviolet lamp. According to the invention, the output power of the ultraviolet lamp is automatically and conveniently adjusted according to the harmful gas concentration and the indoor light intensity, so that the real-time purification rate of the equipment is controlled, and the energy consumption is reduced while the air is effectively purified.

Description

Technical Field

[0001] The invention relates to the technical field of air purification, and in particular to air purification equipment for efficiently photocatalytically degrading volatile organic compounds. Background Art

[0002] A photocatalytic air purifier is a device that uses photocatalytic reactions to purify the air. Its working principle is based on photocatalysis, which catalytically decomposes harmful substances such as organic pollutants and bacteria in the air through the electron-hole pairs generated by the photocatalyst material under light conditions (visible light or ultraviolet light). Usually, titanium dioxide (TiO2) is used as the main photocatalyst. Under the irradiation of ultraviolet light or visible light, it can excite the production of free radicals with strong oxidizing properties. These free radicals can effectively decompose VOCs in the air, thereby improving indoor air quality.

[0003] When the existing air purification equipment is working, the user generally selects a fixed working gear, and no matter how the external environmental conditions (harmful gas concentration) change, the air purification is carried out at the selected working gear, and it is difficult to make autonomous adjustments according to the concentration of harmful gases in the air, which leads to energy waste or insufficient purification effect; and for some devices that use indoor visible light for catalytic purification indoors, the purification effect will be greatly reduced at night or when the indoor light is insufficient. Therefore, the present invention proposes an air purification device for efficient photocatalytic degradation of volatile organic compounds, which adjusts the real-time purification rate based on the concentration of harmful gases and the intensity of visible light. Summary of the invention

[0004] To solve the above problems, the present invention provides an air purification device for efficiently photocatalytically degrading volatile organic compounds, which automatically and conveniently adjusts the output power of the ultraviolet lamp according to the concentration of harmful gases and the indoor light intensity to adjust the real-time purification rate.

[0005] In order to achieve the above-mentioned purpose, the technical scheme of the present invention is as follows: an air purification device for efficient photocatalytic degradation of volatile organic compounds, comprising a shell, a controller embedded in the top of the shell, an air inlet cavity and an air outlet cavity arranged from bottom to top inside the shell, an air inlet and an air outlet respectively connected to the air inlet cavity and the air outlet cavity on the surface of the shell, a concentration sensor for detecting the concentration of harmful gases installed on the inner walls of the air inlet and the air outlet, a catalytic channel arranged inside the shell, a catalytic layer lined inside the catalytic channel, and a plurality of ultraviolet lamps installed on the inner wall of the catalytic channel, one end of the catalytic channel is connected to the air inlet cavity, and the other end of the catalytic channel is connected to the air outlet cavity, a visible light component for obtaining indoor light intensity information and reflecting visible light into the catalytic channel is installed on the top of the shell, a filter component for filtering catalyzed gas is installed in the air outlet cavity, an air intake fan is installed in the air inlet cavity, and a drive component for driving the visible light component to rotate and the filter component to rotate is installed inside the shell; the drive component, the visible light component, the concentration sensor, the ultraviolet lamp and the air intake fan are all electrically connected to the controller; The controller is used to receive indoor light intensity data and harmful gas concentration data, perform linkage analysis on the two data, and adjust the output parameters of the ultraviolet lamp; the output parameters at least include the output power of the ultraviolet lamp; The controller is used to determine whether the light intensity of the lighting area corresponding to the light collector is the maximum value within the light collector collection range based on the indoor light intensity information; when the light intensity of the lighting area corresponding to the light collector is not the maximum value within the light collector collection range, the light collector is controlled to rotate to the area with the maximum light intensity value within the lighting range to collect visible light; The controller is used to reduce the output parameters of the ultraviolet lamp when the real-time purification rate meets the preset purification rate for photocatalytic purification under the condition of indoor light intensity; when the real-time purification rate does not meet the preset purification rate for photocatalytic purification under the condition of indoor light intensity, the output parameters of the ultraviolet lamp are increased to make the real-time purification rate meet the preset purification rate; The driving assembly includes a driving motor installed inside the shell, the driving motor output shaft is coaxially fixedly connected with the first bevel gear, the first bevel gear is meshed with the second bevel gear, the second bevel gear is coaxially fixedly connected with the first rotating shaft that rotates with the shell, the other end of the first rotating shaft is coaxially fixedly connected with the first gear, and the first gear is meshed with the filter assembly; the second bevel gear is meshed with the third bevel gear, the third bevel gear is coaxially fixedly connected with the second rotating shaft that rotates with the shell, and the other end of the second rotating shaft is coaxially fixedly connected with the second gear that meshes with the visible light assembly; the driving motor is electrically connected to the controller.

[0006] Principle of the basic solution: The indoor light intensity data is obtained through the visible light component and the indoor visible light is reflected into the catalytic channel for photocatalytic reaction. At the same time, the visible light component is controlled to rotate through the driving component to face the direction with the maximum indoor light intensity in real time; and the driving component can enable the filter component to clean the accumulated dust while the visible light component rotates, reducing the possibility of clogging of the filter component affecting the purification effect; the ultraviolet lamp in the catalytic channel is controlled by the controller to cooperate with the visible light component, and the output parameters (power, etc.) of the ultraviolet lamp are adjusted in real time according to the concentration of harmful gases in the room and the indoor light intensity, ensuring the purification rate while reducing energy consumption as much as possible.

[0007] The above scheme has the following beneficial effects: 1. Compared with the existing technology, this solution receives indoor light intensity data and harmful gas concentration data in real time through the controller, and conducts linkage analysis to automatically adjust the output parameters of the ultraviolet lamp (such as output power), thereby intelligently adjusting the purification rate according to actual needs, reducing the energy waste or insufficient purification effect caused by the user manually selecting the working gear of the equipment in traditional equipment.

[0008] At the same time, by precisely controlling the output power of the UV lamp, this solution can ensure the purification effect while minimizing energy consumption. When the concentration of harmful gases is low or the indoor light is sufficient, the output power of the UV lamp can be appropriately reduced to save energy; when the concentration of harmful gases is high or the indoor light is insufficient, the output power of the UV lamp will automatically increase to ensure the purification effect.

[0009] 2. In this solution, the visible light component can not only obtain indoor light intensity data, but also reflect the indoor visible light into the catalytic channel for photocatalytic reaction. By driving the visible light component to rotate, it can face the direction with the highest indoor light intensity in real time, maximize the use of indoor visible light for catalytic purification, improve photocatalytic efficiency, and reduce energy waste.

[0010] 3. In this solution, the driving component can not only drive the visible light component to rotate, but also enable the filter component to clean the dust accumulated on itself. And because the visible light component rotates every day, the dust will be cleaned a certain number of times every day, which effectively reduces the risk of clogging of the filter component, ensures the continuity and stability of the purification effect, reduces the frequency of manual maintenance, and improves the reliability and service life of the equipment.

[0011] 4. This solution uses a drive motor as a power source and combines the transmission method of bevel gears and gears to make the entire drive assembly compact and highly efficient. It not only saves space inside the equipment, but also ensures the accuracy and stability of power transmission, providing a strong guarantee for the smooth rotation of the visible light assembly and the filter assembly. The drive motor is electrically connected to the controller to achieve precise control of the drive assembly, so that the controller can accurately control the movement state of the visible light assembly and the filter assembly by adjusting the speed and direction of the drive motor according to actual needs. In addition, through the precise control of the drive assembly, the visible light assembly can face the direction of the maximum indoor light intensity in real time, making maximum use of indoor visible light for catalytic purification. At the same time, regular cleaning of the filter assembly also ensures that it is always in good working condition, thereby further enhancing the purification effect of the equipment.

[0012] 5. In this solution, the controller can intelligently determine whether the light intensity of the current lighting area of ​​the light collector is at the maximum value, and control the light collector to rotate to the area with the maximum light intensity, thereby maximizing the use of indoor visible light for photocatalytic purification. By optimizing the angle of the light collector, the controller can ensure that more light enters the catalytic channel and improve the efficiency of the photocatalytic reaction. Users do not need to manually adjust the angle of the light collector, and the controller can automatically complete the adjustment according to the indoor light intensity information, which improves the intelligence level of the equipment.

[0013] 6. In this solution, the controller can intelligently adjust the output parameters of the UV lamp based on the comprehensive information of indoor light intensity and real-time purification rate, ensuring that the equipment can maintain the best purification effect under different conditions. And by accurately adjusting the output parameters of the UV lamp, the controller can save energy to the maximum extent while ensuring the purification rate.

[0014] Furthermore, the filter assembly includes a filter screen installed in the air outlet cavity and a rotating cylinder meshing with the first gear. The rotating cylinder is slidably matched with the shell. A circular array of cleaning rods is provided on the inner wall of the rotating cylinder. A cleaning layer is provided on one end of the cleaning rods near the filter screen. The filter screen is located within the movement trajectory of the cleaning layer.

[0015] Beneficial effect: by arranging a plurality of cleaning rods in a circular array on the inner wall of the rotating cylinder, and arranging a dust cleaning layer at one end of the cleaning rods close to the filter, when the rotating cylinder rotates under the drive of the first gear, the dust cleaning layer can slide along the surface of the filter, effectively removing the dust and particulate matter attached to the filter, which not only improves the cleaning efficiency, but also extends the service life of the filter, and ensures that the filter is unobstructed by timely removing the dust and particulate matter on the filter, thereby improving the purification rate of the equipment.

[0016] Since the cleaning rod and the cleaning layer work automatically with the rotation of the rotating drum, there is no need for manual regular cleaning and maintenance, which not only reduces maintenance costs but also improves the reliability and stability of the equipment.

[0017] Furthermore, an ash box which is slidably matched with the shell is provided in the air outlet cavity, and the ash box is located between the filter screen and the rotating cylinder.

[0018] Beneficial effects: The dust box can effectively collect dust and particles cleaned from the filter, preventing the dust from flying and settling in the air outlet cavity, which not only improves the cleanliness of the equipment, but also ensures that the purified air is purer. Since the dust box slides with the shell, the user can easily remove it from the equipment for cleaning and replacement, which not only simplifies maintenance work, but also improves the user's convenience of operation.

[0019] Furthermore, the visible light component includes a light collector installed on the top of the shell and rotatably cooperated with the shell, the light collector is meshed with the second gear, the bottom of the light collector is slidably connected to a light collecting channel connected to the catalytic channel, and the top of the light collector is installed with a light intensity sensor electrically connected to the controller; a main reflector and several auxiliary reflectors are installed inside the catalytic channel, the main reflector is located below the connection between the catalytic channel and the light collecting channel, and the auxiliary reflectors are all located at the bend of the catalytic channel.

[0020] Beneficial effects: The light collector can detect the indoor light intensity in real time through the light intensity sensor on its top, and adjust its own angle according to the change of light intensity to maximize the capture and utilization of indoor visible light, which not only improves the efficiency of photocatalytic reaction, but also ensures the stability and reliability of the equipment under different lighting conditions, and when used in conjunction with ultraviolet lamps, it can minimize the energy consumption of ultraviolet lamps. The design of the main reflector and the auxiliary reflector and the positions of the two can make the visible light captured by the light collector reflect smoothly in the catalytic channel, which can reduce the loss and scattering of light, so that the light can be more evenly distributed on the catalytic layer, further enhancing the catalytic effect.

[0021] Furthermore, the controller is used to obtain information from concentration sensors respectively arranged at the air inlet and the air outlet, and analyze and calculate the two information data to obtain a real-time purification rate.

[0022] Beneficial effects: By acquiring the concentration sensor information of the air inlet and outlet in real time, the controller can quickly calculate the real-time purification rate of the device and provide users with immediate feedback on the air purification effect. Based on the real-time purification rate data, the controller can intelligently adjust the working status of the device, such as adjusting the wind speed, UV light intensity, etc., to optimize the purification effect.

[0023] Furthermore, the controller is used to increase the output parameters of the ultraviolet lamp when the indoor light intensity decreases so that the real-time purification rate is lower than the preset purification rate.

[0024] Beneficial effect: When the indoor light intensity decreases, the output parameters of the UV lamp are enhanced to compensate for the light intensity required for the photocatalytic reaction, ensuring that the purification rate is not affected. By intelligently adjusting the output of the UV lamp, the controller can ensure that the device can maintain a high purification rate under different lighting conditions. The UV lamp output is enhanced only when necessary to reduce unnecessary energy waste.

[0025] Furthermore, the controller is used to increase the output parameters of the ultraviolet lamp when the concentration of harmful gases increases so that the real-time purification rate is lower than the preset purification rate.

[0026] Beneficial effects: When the concentration of harmful gases increases, the controller can quickly increase the output parameters of the UV lamp, speed up the photocatalytic reaction rate, and effectively remove harmful gases. By timely increasing the output of the UV lamp, the controller can ensure that the equipment can still maintain efficient purification capabilities when the concentration of harmful gases is high, quickly respond to changes in harmful gas concentrations, ensure stable indoor air quality, and improve user satisfaction with the equipment.

[0027] Additional aspects and advantages of the present invention will be given in part in the following description and in part will be obvious from the following description, or will be learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 It is an overall axonometric diagram of an embodiment of an air purification device for high-efficiency photocatalytic degradation of volatile organic compounds of the present invention; Figure 2 It is an axonometric diagram of a driving component of an embodiment of an air purification device for high-efficiency photocatalytic degradation of volatile organic compounds of the present invention; Figure 3 A side cross-sectional view of a housing of an embodiment of an air purification device for efficiently photocatalytically degrading volatile organic compounds according to the present invention; Figure 4 It is a front cross-sectional view of a catalytic pipeline of an embodiment of an air purification device for high-efficiency photocatalytic degradation of volatile organic compounds of the present invention; Figure 5 It is an enlarged view of part A of an embodiment of an air purification device for efficiently photocatalytically degrading volatile organic compounds according to the present invention.

[0029] The figure marks in the drawings of the specification include: 1. shell; 2. light collector; 3. light intensity sensor; 4. air outlet; 5. dust box; 6. air inlet; 7. secondary reflector; 8. catalytic layer; 9. ultraviolet lamp; 10. main reflector; 11. lighting channel; 12. rotating cylinder; 13. filter; 14. air intake fan; 15. catalytic channel; 16. second gear; 17. second rotating shaft; 18. third bevel gear; 19. second bevel gear; 20. first rotating shaft; 21. first gear; 22. cleaning rod; 23. first bevel gear; 24. controller. DETAILED DESCRIPTION

[0030] The technical solution of the present invention will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0031] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0032] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0033] The following is further described in detail through specific implementation methods: Embodiment 1:

[0034] As attached Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 5 As shown: An air purification device for efficient photocatalytic degradation of volatile organic compounds, comprising a housing 1, a controller 24 is embedded in the top of the housing 1, and an air inlet cavity and an air outlet cavity are arranged from bottom to top inside the housing 1 (with Figure 3As shown in the figure, the shell 1 is provided with an air inlet 6 and an air outlet 4 connected to the air inlet cavity and the air outlet cavity respectively, and the inner walls of the air inlet 6 and the air outlet 4 are both installed with concentration sensors for detecting the concentration of harmful gases, and the shell 1 is provided with a catalytic channel 15, and the catalytic channel 15 is lined with a catalytic layer 8, and the material of the catalytic layer 8 can be preferably one or more catalysts such as titanium dioxide (TiO2), zinc oxide (ZnO) and cadmium sulfide (CdS), and a plurality of ultraviolet lamps 9 are embedded in the inner wall of the catalytic channel 15, one end of the catalytic channel 15 is connected to the air inlet cavity, and the other end of the catalytic channel 15 is connected to the air inlet cavity. The housing 1 is connected to the air outlet cavity. A visible light component for obtaining indoor light intensity information and reflecting visible light into the catalytic channel 15 is installed on the top of the housing 1. A filter component for filtering the catalyzed gas is installed in the air outlet cavity. An air intake fan 14 is installed in the air intake cavity, so that air is output from the air inlet 6 to the air outlet 4 along the catalytic channel 15. A driving component for driving the visible light component and the filter component to rotate is installed inside the housing 1. The driving component, the visible light component, the concentration sensor, the ultraviolet lamp 9 and the air intake fan 14 are all electrically connected to the controller 24. The controller 24 is used to receive indoor light intensity data and harmful gas concentration data, perform linkage analysis on the two data, and adjust the output parameters of the ultraviolet lamp 9; the output parameters at least include the output power of the ultraviolet lamp 9.

[0035] The driving assembly includes a driving motor screwed to the inside of the shell 1, the driving motor output shaft is coaxially keyed to the first bevel gear 23, the first bevel gear 23 is meshed with the second bevel gear 19, the second bevel gear 19 is coaxially keyed to the first rotating shaft 20 that rotates with the shell 1, the other end of the first rotating shaft 20 is coaxially keyed to the first gear 21, and the first gear 21 is meshed with the filter assembly; the second bevel gear 19 is meshed with the third bevel gear 18, the third bevel gear 18 is coaxially keyed to the second rotating shaft 17 that rotates with the shell 1, and the other end of the second rotating shaft 17 is coaxially keyed to the second gear 16 that meshes with the visible light assembly; the driving motor is electrically connected to the controller 24.

[0036] The filter assembly includes a filter screen 13 screwed into the air outlet cavity and a rotating cylinder 12 meshed with the first gear 21, wherein the filter screen 13 can be selected from a HEPA filter screen (which can effectively remove particles larger than 0.3 microns), an activated carbon filter screen (which has excellent adsorption performance and can effectively remove odors, formaldehyde and other harmful gases in the air) and a non-woven filter screen. One or more of the filter screens 13 are used in combination, and the rotating cylinder 12 is slidably matched with the housing 1, and the matching method adopts the matching method of the slider and the slide groove. The inner wall of the rotating cylinder 12 is integrally formed with a circular array of cleaning rods 22, and a dust cleaning layer (with a Figure 2As shown in FIG. 1 , the filter screen 13 is located in the movement track of the dust cleaning layer, and the dust cleaning layer can be made of animal feathers, plastic or sponge. A dust box 5 is provided in the air outlet cavity, which is slidably matched with the housing 1, and the dust box 5 is located between the filter screen 13 and the rotating cylinder 12, so that the user can take out the dust box 5 from the housing 1 for cleaning or replacement. Regular cleaning of the dust box 5 can reduce the accumulation of dust in the air outlet cavity, resulting in a decrease in the effect and efficiency of air purification.

[0037] The visible light component includes a light collector 2 installed on the top of the shell 1 and rotatably matched with the shell 1, the light collector 2 is meshed with the second gear 16, the bottom of the light collector 2 is slidably connected with a lighting channel 11 connected with the catalytic channel 15, and the top of the light collector 2 is installed with a light intensity sensor 3 electrically connected to the controller 24; a main reflector 10 and a plurality of auxiliary reflectors 7 are installed inside the catalytic channel 15, the main reflector 10 is located below the connection between the catalytic channel 15 and the lighting channel 11, and the auxiliary reflectors 7 are all located at the bend of the catalytic channel 15.

[0038] The specific implementation process is as follows: when the controller 24 obtains the current light intensity in the room through the light intensity sensor 3 and determines that the light intensity captured in the current direction of the light collector 2 is not the maximum value in the monitoring area of ​​the light intensity sensor 3, the controller 24 controls the light collector 2 to rotate, firstly starts the driving motor, and the output shaft of the driving motor drives the first bevel gear 23 to rotate, and then the first bevel gear 23 drives the second bevel gear 19, and then the second bevel gear 19 drives the third bevel gear 18 to rotate, and then the third bevel gear 18 drives the second rotating shaft 17 to rotate, and drives the second gear 16 to rotate. After the second gear 16 rotates, since the light collector 2 is slidably connected with the housing 1 and the light collecting pipe, the light collector 2 meshing with the second gear 16 is driven to complete the angle adjustment and capture the visible light in the room. This ensures that the light collector 2 can always be aligned with the direction with the strongest light in the room, so as to maximize the use of visible light to enhance the catalytic effect.

[0039] The visible light in the room is captured by the light collector 2, reflected into the light collecting channel 11, and emitted along the light collecting channel 11 to the main reflector 10 in the catalytic channel 15 for reflection, and then reflected accordingly by the secondary reflector 7 at the bend of the catalytic channel 15, so that the visible light forms a smooth light path along the catalytic channel 15, so that the visible light is evenly dispersed on the catalytic layer 8, thereby enhancing the catalytic effect and reducing the energy consumption of the ultraviolet lamp 9.

[0040] During the air purification process, the filter 13 will continue to work to filter out tiny particles in the air. When the dust on the filter 13 accumulates to a certain extent, causing air circulation to be blocked, the speed of the air intake fan 14 may decrease, thereby affecting the air purification rate. In order to maintain the continuity of air purification, when the light collector 2 rotates according to the change of indoor light intensity to align with the direction of the strongest indoor light intensity, the cleaning structure composed of the rotating cylinder 12, the cleaning rod 22 and the cleaning layer will be synchronously driven to clean the filter 13. Therefore, when the driving motor drives the light collector 2 to rotate, since the second bevel gear 19 is meshed with the first bevel gear 23 and the third bevel gear 18, it will also rotate synchronously, thereby driving the first rotating shaft 20 connected to the shell 1 for rotation, and then the first rotating shaft 20 drives the first gear 21 coaxially fixedly connected thereto. Since the first gear 21 is meshed with the rotating cylinder 12 and the rotating cylinder 12 is slidingly matched with the shell 1, the rotating cylinder 12 rotates around its axis. During the rotation of the rotating cylinder 12, the cleaning rod 22 integrally formed with it on its inner wall will also rotate with the rotating cylinder 12. Since the cleaning rod 22 is bonded with a cleaning layer on the side close to the filter screen 13, and the filter screen 13 is located in the movement trajectory of the cleaning layer, the dust particles accumulated on the filter screen 13 are swept into the dust box 5 as the cleaning layer moves. It is only necessary to clean the dust box 5 regularly to facilitate the user to perform dust cleaning.

[0041] Embodiment 2:

[0042] The difference from Example 1 is that the controller 24 is also used to obtain the concentration sensor information respectively arranged at the air inlet 6 and the air outlet 4, and analyze and calculate the two information data to obtain the real-time purification rate. For example, the concentration sensor at the air inlet 6 detects that the indoor harmful gas (such as VOCs) concentration is 0.1mg / m³, and the concentration sensor at the air outlet 4 detects that the concentration of the harmful gas (such as VOCs) after purification is 0.02mg / m³, then the controller 24 calculates the purification rate as (0.1-0.02) / 0.1=80% based on the concentration difference before and after purification.

[0043] The controller 24 is also used to enhance the output parameters of the ultraviolet lamp 9 when the indoor light intensity decreases, causing the real-time purification rate to be lower than the preset purification rate. The controller 24 is also used to enhance the output parameters of the ultraviolet lamp 9 (such as increasing the power) when the concentration of harmful gases increases, causing the real-time purification rate to be lower than the preset purification rate. For example, when the preset purification rate is 90%, the indoor light intensity decreases due to weather changes, causing the purification rate to drop to 70%. The controller 24 will automatically adjust the power of the ultraviolet lamp 9 to 1.2 times the original power to increase the purification rate to more than 90%. If the indoor VOCs concentration suddenly increases, causing the purification rate to drop to 80%, the controller 24 will immediately adjust the output parameters of the ultraviolet lamp 9, such as increasing the irradiation intensity or time, to ensure that the purification rate quickly recovers to more than 90%.

[0044] The controller 24 is also used to determine whether the light intensity of the lighting area corresponding to the light collector 2 is the maximum value within the collection range of the light collector 2 based on the indoor light intensity information; when the light intensity of the lighting area corresponding to the light collector 2 is not the maximum value within the collection range of the light collector 2, the light collector 2 is controlled to rotate to the area with the maximum light intensity value within the lighting range to collect visible light. For example, there are two lighting areas (A and B) in the room, the light intensity of area A is 1000lx, and the light intensity of area B is 1500lx. The controller 24 detects that the current light collector 2 is facing area A, but the light intensity of area B is higher, then the light collector 2 is controlled to rotate to area B to make full use of the stronger visible light for photocatalytic purification. And during the rotation process, the rotating cylinder 12 and the cleaning rod 22 are driven to rotate at the same time to clean the filter.

[0045] The controller 24 is also used to reduce the output parameters of the ultraviolet lamp 9 when the real-time purification rate meets the preset purification rate under the condition of indoor light intensity for photocatalytic purification; when the real-time purification rate does not meet the preset purification rate for photocatalytic purification under the condition of indoor light intensity, the output parameters of the ultraviolet lamp 9 are increased so that the real-time purification rate meets the preset purification rate. For example, when the preset purification rate is 80%, the indoor light intensity is stable and sufficient for photocatalytic purification, and the real-time purification rate is greater than 80%, the ultraviolet lamp 9 can be turned off or the ultraviolet lamp 9 is in an energy-saving state. When the preset purification rate is 95%, the indoor light intensity can only make the real-time purification rate between 80% and 87%, the controller 24 detects that the purification rate does not reach the preset value, so the power of the ultraviolet lamp 9 is gradually increased until the real-time purification rate reaches more than 95%. At the same time, for the case where only the ultraviolet lamp 9 is irradiated for photocatalytic purification at night, if the preset real-time purification rate is 95%, and initially, the ultraviolet lamp 9 runs at medium power, the real-time purification rate is 90%, the controller 24 detects that the purification rate does not reach the preset value, so the power of the ultraviolet lamp 9 is gradually increased until the real-time purification rate reaches more than 95%.

[0046] Obviously, the above embodiments are merely examples for the purpose of clear explanation, and are not intended to limit the implementation methods. For those skilled in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the implementation methods here. The obvious changes or modifications derived therefrom are still within the scope of protection of the invention.

Claims

1. An air purification device for efficient photocatalytic degradation of volatile organic compounds, characterized in that: The invention comprises a housing (1), wherein a controller (24) is embedded in the top of the housing (1), an air inlet cavity and an air outlet cavity are arranged inside the housing (1) from bottom to top, an air inlet (6) and an air outlet (4) are arranged on the surface of the housing (1) and are respectively connected to the air inlet cavity and the air outlet cavity, and concentration sensors for detecting the concentration of harmful gases are installed on the inner walls of the air inlet (6) and the air outlet (4), and a catalytic channel (15) is arranged inside the housing (1), the catalytic channel (15) is lined with a catalytic layer (8), and a plurality of ultraviolet lamps (9) are installed on the inner wall of the catalytic channel (15), and one end of the catalytic channel (15) is connected to the air inlet cavity. The air cavity is connected, the other end of the catalytic channel (15) is connected to the air outlet cavity, a visible light component for obtaining indoor light intensity information and reflecting visible light into the catalytic channel (15) is installed on the top of the shell (1), a filter component for filtering catalyzed gas is installed in the air outlet cavity, an air intake fan (14) is installed in the air intake cavity, and a drive component for driving the visible light component and the filter component to rotate is installed inside the shell (1); the drive component, the visible light component, the concentration sensor, the ultraviolet lamp (9) and the air intake fan (14) are all electrically connected to the controller (24); The controller (24) is used to receive indoor light intensity data and harmful gas concentration data, perform linkage analysis on the two data, and adjust output parameters of the ultraviolet lamp (9); the output parameters at least include the output power of the ultraviolet lamp (9); The controller (24) is also used to determine, based on the indoor light intensity information, whether the light intensity of the lighting area corresponding to the light collector (2) is the maximum value within the collection range of the light collector (2); when the light intensity of the lighting area corresponding to the light collector (2) is not the maximum value within the collection range of the light collector (2), the light collector (2) is controlled to rotate to the area with the maximum light intensity value within the lighting range to collect visible light; The controller (24) is also used for reducing the output parameter of the ultraviolet lamp (9) when photocatalytic purification is performed under the condition of indoor light intensity and the real-time purification rate meets the preset purification rate; and increasing the output parameter of the ultraviolet lamp (9) when photocatalytic purification is performed under the condition of indoor light intensity and the real-time purification rate does not meet the preset purification rate, so that the real-time purification rate meets the preset purification rate; The drive assembly comprises a drive motor installed inside the housing (1); the output shaft of the drive motor is coaxially fixedly connected to a first bevel gear (23); the first bevel gear (23) is meshed with a second bevel gear (19); the second bevel gear (19) is coaxially fixedly connected to a first rotating shaft (20) that is rotatably matched with the housing (1); the other end of the first rotating shaft (20) is coaxially fixedly connected to a first gear (21); the first gear (21) is meshed with the filter assembly; the second bevel gear (19) is meshed with a third bevel gear (18); the third bevel gear (18) is coaxially fixedly connected to a second rotating shaft (17) that is rotatably matched with the housing (1); the other end of the second rotating shaft (17) is coaxially fixedly connected to a second gear (16) that is meshed with the visible light assembly; the drive motor is electrically connected to a controller (24).

2. The air purification device for efficient photocatalytic degradation of volatile organic compounds according to claim 1 is characterized in that: The filter assembly comprises a filter screen (13) installed in the air outlet cavity and a rotating cylinder (12) meshed with a first gear (21); the rotating cylinder (12) is slidably matched with the housing (1); a plurality of cleaning rods (22) are provided in a circular array on the inner wall of the rotating cylinder (12); a dust cleaning layer is provided at one end of the cleaning rods (22) close to the filter screen (13); and the filter screen (13) is located within the movement trajectory of the dust cleaning layer.

3. The air purification device for high-efficiency photocatalytic degradation of volatile organic compounds according to claim 2 is characterized in that: An ash box (5) that is slidably matched with the shell (1) is provided in the air outlet cavity, and the ash box (5) is located between the filter screen (13) and the rotating cylinder (12).

4. The air purification device for high-efficiency photocatalytic degradation of volatile organic compounds according to claim 3 is characterized by: The visible light assembly comprises a light collector (2) mounted on the top of a housing (1) and rotatably matched with the housing (1); the light collector (2) is meshed with a second gear (16); a light collecting channel (11) connected to a catalytic channel (15) is slidably connected to the bottom of the light collector (2); a light intensity sensor (3) electrically connected to a controller (24) is mounted on the top of the light collector (2); a main reflector (10) and a plurality of auxiliary reflectors (7) are mounted inside the catalytic channel (15); the main reflector (10) is located below the connection between the catalytic channel (15) and the light collecting channel (11); and the auxiliary reflectors (7) are all located at the bend of the catalytic channel (15).

5. The air purification device for high-efficiency photocatalytic degradation of volatile organic compounds according to claim 4 is characterized in that: The controller (24) is also used to obtain information from concentration sensors respectively arranged at the air inlet (6) and the air outlet (4), and to analyze and calculate the two pieces of information data to obtain a real-time purification rate.

6. The air purification device for high-efficiency photocatalytic degradation of volatile organic compounds according to claim 5 is characterized in that: The controller (24) is also used to increase the output parameters of the ultraviolet lamp (9) when the indoor light intensity decreases so that the real-time purification rate is lower than the preset purification rate.

7. The air purification device for high-efficiency photocatalytic degradation of volatile organic compounds according to claim 6 is characterized by: The controller (24) is also used to increase the output parameters of the ultraviolet lamp (9) when the concentration of the harmful gas increases so that the real-time purification rate is lower than the preset purification rate.

Images