Photocatalyst air purification equipment for automobile

Abstract

The invention discloses photocatalyst air purification equipment for an automobile, relates to the technical field of automobile air purification, and aims to solve the technical problems of low utilization rate of a photocatalyst filter element and incomplete air purification of a cabin caused by incomplete illumination of an LED light source and existence of illumination dead angles in the conventional vehicle-mounted photocatalyst air purification equipment. Dynamic light spots are combined with multi-azimuth light supplement, illumination dead angles are thoroughly eliminated, the photocatalytic efficiency of a photocatalyst and the utilization rate of a filter element are remarkably improved, meanwhile, the service life of the filter element is prolonged by means of the self-cleaning function, and the air purification requirements of cabins of various passenger vehicles and commercial vehicles are met.

Description

Technical Field

[0001] This application relates to the field of automotive air purification technology, and in particular to a photocatalytic air purification device for automobiles. Background Technology

[0002] With the rapid development of the automotive industry and the increasing attention consumers pay to cabin air quality, in-vehicle air purification equipment has become an important component of automotive interiors. Among them, in-vehicle air purification equipment based on the principle of photocatalysis is widely used in various passenger cars and commercial vehicles due to its characteristics of efficiently decomposing harmful gases, sterilizing and disinfecting without secondary pollution.

[0003] The core working principle of existing in-vehicle photocatalytic air purification equipment is as follows: LED light sources emit light of a specific wavelength to irradiate the photocatalytic filter (mostly with a pleated structure to increase the contact area with air), which stimulates the photocatalytic material to generate strong oxidizing free radicals, thereby decomposing harmful gases such as formaldehyde and benzene in the air flowing through the filter and killing bacteria and viruses, ultimately achieving cabin air purification.

[0004] However, existing in-vehicle photocatalytic air purification devices still suffer from key technical defects in practical applications. LED light source illumination coverage is incomplete, with light gaps appearing at the edges of the filter element. Most existing devices use static, fixed LED light sources, resulting in a fixed light propagation path and limited coverage. For photocatalytic filters, the edge areas of their cross-section, especially the corners and sides where the filter connects to the device housing, are often not effectively covered by the LED light source, creating blind spots. The photocatalytic material in these blind spots is difficult to activate due to insufficient light, leading to a reduced overall purification area utilization rate of the filter element. Harmful gases and microorganisms in the cabin cannot be completely removed, resulting in incomplete purification.

[0005] There is an urgent need for a technical solution that can overcome the above-mentioned shortcomings in order to improve the purification efficiency of vehicle-mounted photocatalytic air purification equipment. Summary of the Invention

[0006] To address the aforementioned issues, this application provides a photocatalytic air purification device for automobiles.

[0007] A photocatalytic air purification device for automobiles includes a photocatalytic filter, a supplementary lighting module, and a micro turbine. The supplementary lighting module includes a light source for irradiating the photocatalytic filter. The micro turbine is disposed on the side of the light source away from the photocatalytic filter. The blade surface of the micro turbine is provided with a reflector for continuously refracting the light emitted by the light source to form a spiral dynamic light spot to cover the entire cross-section of the photocatalytic filter.

[0008] Compared with existing technologies, existing vehicle-mounted photocatalytic devices use static light sources, which have limited light coverage and are prone to forming light dead zones at the edges and corners of the filter element cross-section, resulting in insufficient excitation of photocatalytic materials. This application uses a micro turbine to drive the reflector to rotate, converting static light into a spiral dynamic light spot, which can fully cover the cross-section of the filter element, completely eliminate light dead zones, and significantly improve the utilization rate of the photocatalytic filter element.

[0009] By adopting the above technical solution, the micro turbine provides rotational power for the reflector, which can collect and continuously refract diffused light from behind the light source. This not only avoids light waste and improves the utilization efficiency of the light source, but also ensures that all areas of the filter element, including the edges and connecting corners, can receive uniform illumination through the rotational characteristics of the dynamic light spot, providing sufficient energy for the photocatalytic reaction.

[0010] Furthermore, the device also includes a light-transmitting housing made of transparent plastic. The light-transmitting housing includes a horizontally arranged top plate and side plates located on opposite sides of the top plate and extending vertically downward, giving the light-transmitting housing a U-shaped structure. The top plate has several top mounting slots for accommodating light sources, and the side plates have several side mounting slots.

[0011] By adopting the above technical solution, the transparent plastic shell can minimize light attenuation and ensure that the light from the supplementary lighting module acts efficiently on the photocatalytic filter. The U-shaped top plate and side plate form an open installation space, which facilitates filter disassembly and maintenance. The top mounting slot fixes the light source, and the side mounting slot provides a mounting base for subsequent side supplementary lighting components, realizing a multi-dimensional layout of the lighting direction.

[0012] Furthermore, the two side plates are each provided with a grid plate on their exterior. The supplementary lighting module also includes several LED beads, which are respectively installed on the side of the grid plate near the side plate. Each LED bead is inserted into a corresponding side mounting groove to irradiate the side pleated area of ​​the photocatalytic filter.

[0013] By adopting the above technical solution, the grid plate provides a stable mounting carrier for the LED beads, while its grid structure does not obstruct airflow; the LED beads are precisely aligned with the deep folds on the side of the filter element through the side mounting groove, and the emitted light can directly act on the photocatalytic material in the recessed area, stimulating the catalytic activity of the area and further improving the overall purification area and efficiency of the filter element.

[0014] Furthermore, the grid plate is evenly provided with a plurality of grid holes, and a side filter screen is fixedly provided on the side of the grid plate away from the side plate. The side filter screen completely covers the grid holes and is used to filter the air entering the equipment.

[0015] By adopting the above technical solution, the grid holes ensure that air enters the equipment smoothly and avoids excessive airflow resistance from affecting the purification air volume; the side filter screen completely covers the grid holes, which can intercept suspended particles, dust and other impurities in the air and prevent them from adhering to the surface of the lamp beads or the folds of the filter element after entering the equipment, thus providing a clean air environment for the subsequent purification process.

[0016] Furthermore, a baffle is provided on the light-transmitting shell at a position opposite to the two side plates. The baffle is fixedly connected to the light-transmitting shell, so that the light-transmitting shell encloses and forms a photocatalyst mounting cavity, and the photocatalyst filter is placed in the photocatalyst mounting cavity.

[0017] By adopting the above technical solution, the U-shaped structure of the baffle and the light-transmitting shell forms a closed photocatalyst installation cavity, which confines the filter element in a fixed space. After the air enters the equipment, it must be forced to flow through the filter element in the installation cavity before it can be discharged, avoiding the direct short-circuit discharge of unpurified air. At the same time, the installation cavity provides stable support for the filter element, preventing the filter element from shifting due to the bumps of the car driving, and ensuring a stable contact path between light and air.

[0018] Furthermore, a piezoelectric ceramic vibrating plate is fixedly disposed on the side of the baffle near the photocatalyst mounting cavity, and mounting portions extend vertically from both ends of the photocatalyst filter element. The mounting portions are located in the lower section of the baffle and are fixedly connected to the active end of the piezoelectric ceramic vibrating plate, for dust removal of the photocatalyst filter element by high-frequency vibration of the piezoelectric ceramic vibrating plate.

[0019] By adopting the above technical solution, the piezoelectric ceramic vibrating plate is directly connected to the filter element through the mounting part. Its high-frequency vibration can drive the filter element to vibrate synchronously, so that the dust and impurities attached to the surface and folds of the filter element are removed. The vibration frequency is controllable and the intensity is moderate, which can effectively remove dust without damaging the photocatalytic coating or filter element structure, thus extending the service life of the filter element.

[0020] Furthermore, the upper section of the baffle is evenly provided with a number of grid holes, and a side filter screen is fixedly provided on the side of the baffle away from the photocatalyst mounting cavity. The side filter screen completely covers the grid holes and is used to filter the air entering the device.

[0021] By adopting the above technical solution, the grid holes on the upper part of the baffle and the grid holes on the side plate form a complementary air intake channel, ensuring sufficient overall air intake for the equipment; the baffle side filter and the grid side filter work together to filter the air entering the installation cavity from different directions, doubly intercepting impurities, minimizing dust contamination of the photocatalytic filter and supplementary lighting module, and maintaining long-term stable operation of the equipment.

[0022] Furthermore, the device also includes a sealed housing, which is configured as a frame structure. The micro turbine is installed inside the sealed housing, and a control module for controlling the light source and the working state of the micro turbine is also provided inside the sealed housing.

[0023] By adopting the above technical solutions, the frame-shaped sealed shell can effectively block the noise generated by the rotation of the micro turbine, improving the comfort of the cabin; the sealed shell provides rigid support for the turbine, reducing the impact of vehicle bumps on the turbine's rotational accuracy and ensuring the stability and coverage of the dynamic light spot; the control module integrates functions such as light source brightness adjustment and turbine speed control, and can automatically adjust the working parameters according to the cabin air quality, making it easy to operate and optimizing energy consumption.

[0024] Furthermore, the micro turbine has several blades, each blade being an arc-shaped streamline. The reflector is a rectangular strip structure, with the number of reflectors corresponding one-to-one with the number of blades. Each reflector is installed on the side of the corresponding blade closest to the light source, used to collect and reflect light from behind the light source to improve the utilization efficiency of the light source.

[0025] By adopting the above technical solutions, the curved streamlined blades can reduce airflow resistance, reduce turbine energy consumption, and improve rotational stability; the rectangular strip-shaped reflector is adapted to the shape of the blade and fits tightly, making it firmly installed and not easy to fall off; the reflector collects light that would otherwise be lost from behind the light source and reflects it to the direction of the filter element, further improving the utilization rate of the light source, reducing energy loss, and achieving a stronger lighting effect under the same energy consumption.

[0026] Furthermore, a main filter screen is provided on the side of the light-transmitting outer shell away from the sealed outer shell. The main filter screen covers the opening end of the photocatalyst mounting cavity and is used to filter the air entering the device.

[0027] By adopting the above technical solution, the main filter screen covers the opening end of the installation cavity, serving as the first filtration barrier for air entering the equipment. It can effectively intercept large particulate impurities, hair, etc., preventing them from getting stuck in the filter element folds after entering the installation cavity. The main filter screen is designed to be detachable, making it easy to clean or replace regularly, resulting in low maintenance costs. At the same time, it avoids physical damage to the photocatalytic coating caused by large particulate impurities, ensuring that the filter element maintains good light and catalytic performance over a long period of time.

[0028] In summary, this application includes at least one of the following beneficial technical effects: 1. By using a spiral dynamic light spot formed by a micro turbine and a reflector, combined with targeted supplementary lighting from side LEDs, the photocatalytic filter cartridge's cross-section and side folds are illuminated, eliminating blind spots in existing technologies. At the same time, the reflector recovers the diffused light behind the light source, improving the light source utilization efficiency and ensuring that the photocatalytic materials in each area of ​​the filter cartridge are fully activated, resulting in improved purification efficiency compared to existing equipment.

[0029] 2. The high-frequency vibration of the piezoelectric ceramic vibrating plate can achieve self-cleaning of the filter element and reduce dust adhesion; the main filter screen and the double-sided filter screen form a multi-path filtration structure of pre-coarse filtration and double-sided fine filtration, which effectively intercepts impurities and avoids filter element contamination and clogging; under dual protection, the filter element replacement cycle is extended to 2-3 times that of existing equipment, reducing user maintenance costs.

[0030] 3. The equipment has a compact overall structure and can be adapted to the cabin installation space of various passenger cars and commercial vehicles. Attached Figure Description

[0031] Figure 1 This is a perspective view of an embodiment of this application, mainly showing the overall structure; Figure 2 This is an exploded view of the equipment, mainly showing its specific structure; Figure 3 This is an exploded view of the equipment, mainly showing the specific structure of the light-transmitting outer shell; Figure 4 This is an exploded view of the equipment, mainly showing the side filter, baffle, and side mounting groove; Figure 5 This is an exploded view of the equipment, mainly showing the LED beads and grid plate; Figure 6 This is a partial view of the equipment, mainly showing the piezoelectric ceramic vibrating plate; Figure 7 The main exhibit is reflective sheets.

[0032] Explanation of reference numerals in the attached drawings: 10. Control module; 11. Light source; 12. Lamp bead; 2. Sealed housing; 21. Micro turbine; 211. Reflector; 3. Light-transmitting housing; 31. Top plate; 311. Top mounting slot; 32. Side plate; 312. Side mounting slot; 4. Photocatalytic filter element; 41. Mounting part; 5. Baffle; 51. Piezoelectric ceramic vibrating plate; 6. Grid plate; 61. Grid hole; 62. Side filter screen; 7. Main filter screen. Detailed Implementation

[0033] The present application will be further described in detail below with reference to the accompanying drawings.

[0034] The technical solutions of this application will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are merely some embodiments of this application, and not all embodiments. The components of this application described and shown in the accompanying drawings can generally be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of this application provided in the accompanying drawings is not intended to limit the scope of the claimed application, but merely to illustrate selected embodiments of this application. All other embodiments obtained by those skilled in the art based on the embodiments of this application without inventive effort are within the scope of protection of this application.

[0035] This specific embodiment discloses a photocatalytic air purification device for automobiles, referring to... Figure 1 and Figure 2 This device aims to address the problems of insufficient illumination from the LED light source 11 and light leakage at the edges and deep folds of the filter element in existing technologies. It includes a photocatalytic filter element 4, a supplementary lighting module, a micro turbine 21, a light-transmitting housing 3, a piezoelectric ceramic vibrating plate 51, and a multi-stage filter. The supplementary lighting module and the micro turbine 21 work together to achieve dynamic light spot illumination. The light-transmitting housing 3 provides a mounting carrier and light transmission path for all components, and the piezoelectric ceramic vibrating plate 51 enables the filter element to self-clean.

[0036] Reference Figure 2 and Figure 7The micro-turbine 21 includes a micro-turbine body and blades. The micro-turbine body is mounted on the side of the supplementary lighting module light source 11 away from the photocatalytic filter 4 via a fixed bracket, and is used to drive the reflector 211 to rotate at a uniform speed. The micro-turbine 21 preferably has 6-14 blades, which adopt an arc-shaped streamlined design with a radius of curvature of 15-25mm, effectively reducing airflow resistance and providing a stable mounting surface for the reflector 211. Each blade has a reflector 211 fixedly mounted on the side closest to the light source 11 using a high-strength adhesive. The number of reflectors 211 corresponds one-to-one with the number of blades. The reflector 211 is a rectangular strip structure, 30-50mm in length and 8-12mm in width, with a polished surface and coated with a high-reflectivity aluminum film, achieving a reflectivity ≥95%. The reflector 211 is perfectly matched to the shape of the blade, and the two fit together tightly. On the one hand, it can continuously refract the light emitted by the light source 11 towards the photocatalytic filter 4, forming a spiral dynamic light spot. On the other hand, it can collect and reflect the scattered light from behind the light source 11, avoiding light waste and improving the utilization efficiency of the light source 11. The reflector 211 is rotated by the micro turbine 21, which continuously refracts the light from the supplementary lighting module to form a spiral dynamic light spot with a coverage range of 120°-150°. This allows the light from the light source 11 to fully illuminate the edge area and deep folds of the cross-section of the photocatalytic filter 4, and increases the illumination area of ​​the photocatalytic filter 4 in the dead corners caused by the folds, solving the problem of missed illumination of the filter.

[0037] Reference Figure 3 , Figure 4 and Figure 5 The light-transmitting housing 3 is made of high-transmittance polycarbonate material (transmittance ≥90%), and has an overall U-shaped structure, including a horizontally arranged top plate 31 and side plates 32 located on opposite sides of the top plate 31 and extending vertically downwards. The light-transmitting housing 3 is used to ensure that the light emitted by the supplementary lighting module is transmitted to the photocatalytic filter 4 with as little loss as possible, while providing a stable mounting base for each functional component.

[0038] Reference Figure 3 , Figure 4 and Figure 5 The top plate 31 has several top mounting slots 311 evenly distributed along its length, the dimensions of which are adapted to the external dimensions of the light source 11. The supplementary lighting module includes several light sources 11 and LED beads 12. The light sources 11 are specifically LED beads 12, used to provide high-intensity catalytic excitation light. The LED beads 12 are specifically low-power LED beads 12, used for local supplementary illumination. The light sources 11 are respectively installed in the top mounting slots 311 and fixedly connected to the top plate 31 by screws. The illumination direction of the light sources 11 is towards the filter element, providing basic light for the formation of dynamic light spots.

[0039] Reference Figure 3, Figure 4 and Figure 5 Two side plates 32 are each fixed to the outside with a grid plate 6 made of ABS material by screws. LED beads 12 are installed on the side of the grid plate 6 closest to the side plate 32 by welding or plugging, and each LED bead 12 is inserted into a corresponding side mounting groove 312 on the side plate 32 and sealed and fixed to the side plate 32 with waterproof adhesive. The number of side mounting grooves 312 is preferably 2-5, evenly distributed along the height of the side plate 32, to supplement the illumination of the wrinkled areas on the side of the filter element. The grid plate 6 has several evenly distributed grid holes 61. A side filter 62 is fixed to the side of the grid plate 6 away from the side plate 32 by clips, completely covering the grid holes 61. The side filter 62 uses a HEPA filter with a filtration accuracy ≥0.3μm. Its function is to perform preliminary filtration of air before it enters the device, preventing dust from adhering to the filter element surface and affecting the photocatalytic effect, thus providing a clean air source for subsequent purification stages.

[0040] Reference Figure 3 , Figure 4 and Figure 5 A baffle 5 is provided on the light-transmitting outer shell 3 at a position opposite to the two side plates 32. The baffle 5 is fixedly connected to the light-transmitting outer shell 3 by screws, so that the light-transmitting outer shell 3 encloses and forms a closed photocatalyst mounting cavity. The photocatalyst filter element 4 is placed vertically inside the photocatalyst mounting cavity. The internal dimensions of the photocatalyst mounting cavity are adapted to the external dimensions of the photocatalyst filter element 4, which can ensure that the air flowing through the filter element has full contact, avoid the direct discharge of unpurified air, and improve purification efficiency.

[0041] Reference Figure 6 A piezoelectric ceramic vibrating plate 51 with a resonant frequency of 20-30kHz and a power of 1-3W is fixedly mounted on the side of the baffle 5 near the photocatalyst mounting cavity via an insulating gasket. The photocatalyst filter element 4 has mounting portions 41 extending vertically from both ends. The mounting portions 41 are located in the lower half of the area of ​​the baffle 5, and are fixedly connected to the active end of the piezoelectric ceramic vibrating plate 51 via metal connectors. After the equipment has been running for a period of time, a small amount of dust will adhere to the surface of the filter element. At this time, the piezoelectric ceramic vibrating plate 51 drives the filter element to vibrate synchronously through high-frequency vibration, causing the dust to detach from the filter element surface, achieving self-cleaning and extending the filter element's service life by 30%-50%.

[0042] Reference Figure 3 , Figure 4 and Figure 5 The upper half of the baffle 5 has several grid holes 61. A side filter 62 is fixedly installed on the side of the baffle 5 away from the photocatalyst installation cavity by a snap fastener, and the side filter 62 completely covers the grid holes 61. This further improves the cleanliness of the air entering the installation cavity and reduces dust contamination of the photocatalyst coating.

[0043] Reference Figure 3 , Figure 4 and Figure 5 The sealed housing 2 is a frame-like structure made of ABS material and filled with sound-absorbing cotton. The micro-turbine 21 is mounted inside the sealed housing 2 via a fixed bracket. The design of the sealed housing 2 effectively reduces the noise of the micro-turbine 21 during operation by 20-30 dB, while providing a stable installation environment for the turbine, preventing the vibrations during vehicle travel from affecting the turbine's rotational accuracy and thus the stability of the dynamic light spot. The sealed housing 2 also houses a control module 10, which includes a conventional PCB board, control chip, power management module, and sensor components, including a dust sensor and an air quality sensor. The control module 10 is electrically connected to the light source 11, LED beads 12, and micro-turbine 21 of the supplementary lighting module via wires. The control module 10 can control the brightness of the light source 11, adjust the rotation speed of the micro-turbine 21, and intelligently control the switching of the LED beads 12. By adjusting the rotation speed of the micro-turbine 21, the rotation speed of the light spot is changed, ensuring that the dynamic light spot continuously covers the cross-section of the filter element. By controlling the start and stop of LED beads 12, they can be turned on when enhanced illumination is needed in the pleated area on the side of the filter element, thus reducing energy consumption.

[0044] Reference Figure 3 , Figure 4 and Figure 5 The main filter 7 is located on the side of the light-transmitting housing 3 away from the sealed housing 2, and is fixedly attached to the opening end of the photocatalyst mounting cavity by a snap-fit. When air enters from outside the equipment, it first passes through the main filter 7, where large particles are intercepted, preventing them from entering the mounting cavity and adhering to the deep folds of the filter element, thus affecting light irradiation and photocatalytic efficiency.

[0045] The surface of the photocatalytic filter element 4 is coated with a nano-scale titanium dioxide photocatalytic coating.

[0046] The implementation principle of this application embodiment is as follows: The control module 10 automatically activates the light source 11 and LED beads 12 of the supplementary lighting module based on the signal detected by the air quality sensor, and simultaneously controls the micro turbine 21 to begin rotating. The micro turbine 21 drives the blades and reflector 211 to rotate synchronously. The reflector 211 continuously refracts the light emitted by the light source 11, forming a spiral dynamic light spot with a rotational angular velocity of 10-17 rad / s. The light spot covers the entire cross-section of the photocatalytic filter element 4 as it rotates, with a coverage efficiency ≥95%. Simultaneously, the reflector 211 collects reflected and dispersed light from behind the light source 11, improving the utilization efficiency of the light source 11 by 25%-40%. The LED beads 12 illuminate the deep folds on the side of the filter element through the side mounting groove 312. The dynamic light spot expands the irradiation range, avoiding irradiation omissions, and further improves the photocatalytic excitation efficiency by 30%-50%.

[0047] Outside air enters the photocatalyst installation chamber and is fully excited by the dynamic light spot and LED beads 12, generating strong oxidizing free radicals. These free radicals come into full contact with the clean air flowing through the filter, decomposing harmful gases such as formaldehyde and benzene, and killing bacteria and viruses. The purified air is then discharged after being filtered through the side filter screen 62 of the side panel 32 and baffle 5.

[0048] When the control module 10 detects that the amount of dust accumulated on the filter element surface has reached a preset threshold through the dust sensor, it automatically activates the piezoelectric ceramic vibrator 51. The piezoelectric ceramic vibrator 51 drives the photocatalytic filter element 4 to vibrate at high frequency through the mounting part 41, causing the dust attached to the filter element surface to fall off. Under the action of gravity, the dust falls onto the main filter screen 7 at the bottom of the photocatalytic mounting cavity. The main filter screen 7 can be disassembled and cleaned periodically, with a recommended cleaning cycle of 1-2 months.

[0049] The above description is merely an embodiment of this application and is not intended to limit the scope of protection of this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the scope of protection of this application.

Claims

1. A photocatalytic air purification device for automobiles, characterized in that, It includes a photocatalytic filter (4), a supplementary light module and a micro turbine (21). The supplementary light module includes a light source (11) for irradiating the photocatalytic filter (4), and the micro turbine (21) is disposed on the side of the light source (11) away from the photocatalytic filter (4). The blade surface of the micro turbine (21) is provided with a reflector (211) to continuously refract the light emitted by the light source (11) to form a spiral dynamic light spot to cover the entire cross-section of the photocatalytic filter (4).

2. The automotive photocatalytic air purification device according to claim 1, characterized in that, It also includes a light-transmitting shell (3), which is made of transparent plastic material. The light-transmitting shell (3) includes a horizontally arranged top plate (31) and side plates (32) located on opposite sides of the top plate (31) and extending vertically downward, so that the light-transmitting shell (3) has a U-shaped structure. The top plate (31) has several top mounting slots (311) for accommodating the light source (11), and the side plate (32) has several side mounting slots (312).

3. The automotive photocatalytic air purification device according to claim 2, characterized in that, The two side plates (32) are also provided with grid plates (6) on their exteriors. The supplementary lighting module also includes several lamp beads (12). The lamp beads (12) are respectively installed on the side of the grid plate (6) near the side plate (32), and each lamp bead (12) is inserted into the side mounting groove (312) to irradiate the side folded area of ​​the photocatalytic filter (4).

4. The automotive photocatalytic air purification device according to claim 3, characterized in that, The grid plate (6) has a plurality of grid holes (61) evenly distributed on it. A side filter (62) is fixedly provided on the side of the grid plate (6) away from the side plate (32). The side filter (62) completely covers the grid holes (61) and is used to filter the air entering the equipment.

5. The photocatalytic air purification device for automobiles according to claim 2, characterized in that, A baffle (5) is also provided on the light-transmitting shell (3) at a position opposite to the two side plates (32). The baffle (5) is fixedly connected to the light-transmitting shell (3) so that the light-transmitting shell (3) encloses and forms a photocatalyst mounting cavity. The photocatalyst filter (4) is placed in the photocatalyst mounting cavity.

6. The photocatalytic air purification device for automobiles according to claim 5, characterized in that, A piezoelectric ceramic vibrating plate (51) is fixedly provided on the side of the baffle (5) near the photocatalyst mounting cavity. The two ends of the photocatalyst filter element (4) have mounting parts (41) extending vertically. The mounting parts (41) are located in the lower section of the baffle (5) and are fixedly connected to the working end of the piezoelectric ceramic vibrating plate (51) for dust removal of the photocatalyst filter element (4) by the high-frequency vibration of the piezoelectric ceramic vibrating plate (51).

7. The automotive photocatalytic air purification device according to claim 6, characterized in that, The upper section of the baffle (5) is evenly provided with a plurality of grid holes (61). A side filter (62) is fixedly provided on the side of the baffle (5) away from the photocatalyst mounting cavity. The side filter (62) completely covers the grid holes (61) and is used to filter the air entering the device.

8. The photocatalytic air purification device for automobiles according to claim 1, characterized in that, It also includes a sealed housing (2), which is configured as a frame structure. The micro turbine (21) is installed inside the sealed housing (2). The sealed housing (2) is also provided with a control module (10) for controlling the working state of the light source (11) and the micro turbine (21).

9. The photocatalytic air purification device for automobiles according to claim 1, characterized in that, The micro turbine (21) has several blades, and the blades are in the shape of an arc-shaped streamline. The reflector (211) is a rectangular strip structure. The number of reflectors (211) corresponds one-to-one with the number of blades, and each reflector (211) is installed on the side of the corresponding blade close to the light source (11) to collect and reflect light from behind the light source (11) in order to improve the utilization efficiency of the light source (11).

10. A photocatalytic air purification device for automobiles according to claim 2, characterized in that, The light-transmitting outer shell (3) is provided with a main filter (7) on the side away from the sealed outer shell (2). The main filter (7) covers the opening end of the photocatalyst mounting cavity and is used to filter the air entering the device.

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