Photocatalytic air purification device

Abstract

The photocatalytic air purification device comprises a box body, air openings are formed in the two sides of the box body, an air inlet assembly used for conveying air is fixedly installed outside one of the air openings, a filter screen assembly and a pressing locking assembly are installed in the air inlet assembly, and a moving assembly used for moving is fixedly installed at the bottom of the box body; the photocatalytic air purification device comprises a box body, a photocatalytic assembly is installed in the box body, a transmission assembly used for moving the photocatalytic assembly is installed in the photocatalytic assembly, a catalyst assembly is installed below the photocatalytic assembly, and a stirring assembly used for stirring a catalyst to restore activity is installed at the bottom of the catalyst assembly. Two different catalysts are placed in the device through the catalyst assembly, the inactivated catalysts are stirred through the stirring assembly, equipment damage caused by filter screen blockage is reduced by pressing the locking assembly, and the service life of the photocatalytic air purification device is prolonged.

Description

Technical Field

[0001] The present invention relates to the technical field of air purification, and particularly to a photocatalytic air purification device. Background Art

[0002] Photocatalytic purification technology mainly utilizes the photocatalyst titanium dioxide to absorb the light energy radiated from the outside and directly convert it into chemical energy. When light with energy greater than the band gap irradiates the semiconductor, photoexcited electrons transition to the conduction band, forming conduction band electrons, and at the same time leaving holes in the valence band. The holes and electrons can also directly recombine inside or on the surface of the catalyst particles, and can oxidize a variety of organic substances and mineralize them, and can achieve the effects of sterilization and air purification.

[0003] However, existing photocatalytic air purification devices often only configure one type of catalyst. However, different pollutants have different chemical structures and properties, and a single catalyst often only has a good degradation effect on specific types of pollutants. The catalyst will also lose its activity after a long time of purifying air, resulting in a lower efficiency of purifying air. Moreover, the filter screen in the air purification device is not easy to disassemble and replace. When cleaning the filter screen, it may not be possible to carry out a comprehensive and thorough cleaning, and it is difficult to remove the dust and impurities in some corners and crevices. The long-term accumulation will affect the performance of the filter screen.

[0004] Therefore, it is necessary to provide a photocatalytic air purification device. Summary of the Invention

[0005] The purpose of the present invention is to provide a photocatalytic air purification device to solve the problems raised in the above background art that existing photocatalytic air purification devices often only configure one type of catalyst. However, different pollutants have different chemical structures and properties, and a single catalyst often only has a good degradation effect on specific types of pollutants. The catalyst will also lose its activity after a long time of purifying air, resulting in a lower efficiency of purifying air. Moreover, the filter screen in the air purification device is not easy to disassemble and replace. When cleaning the filter screen, it may not be possible to carry out a comprehensive and thorough cleaning, and it is difficult to remove the dust and impurities in some corners and crevices. The long-term accumulation will affect the performance of the filter screen.

[0006] To achieve the above-mentioned objectives, the present invention provides the following technical solutions: a photocatalytic air purification device, comprising a box body, with air outlets on both sides of the box body, wherein an air inlet assembly for conveying air is fixedly installed on the outside of one of the air outlets, a filter assembly and a push-lock assembly are installed inside the air inlet assembly, a moving assembly for moving is fixedly installed on the bottom of the box body, a photocatalytic assembly is installed inside the box body, a transmission assembly for moving the photocatalytic assembly is installed inside the photocatalytic assembly, a catalyst assembly is installed below the photocatalytic assembly, and a stirring assembly for stirring the catalyst to restore its activity is installed at the bottom of the catalyst assembly.

[0007] Preferably, the movable component includes a base plate, the four corners inside the base plate are rotatably mounted with a rotating seat, the bottom of the rotating seat is fixedly mounted with a mounting frame, and the insides of the four mounting frames are rotatably mounted with rotating wheels. The movable photocatalytic air purification device can adjust its position at any time according to different space layouts and needs, and can be easily placed in the corners of the room, the edges of large conference rooms, etc. It can also be flexibly moved in an open office area to avoid occupying too much effective space, making space utilization more reasonable and efficient.

[0008] Preferably, a control panel is fixedly installed on the front of the box, and a catalytic switch, a stirring switch and an air inlet switch are fixedly installed on the surface of the control panel. The operator does not need to run back and forth between the various purification devices, but only needs to perform unified opening, closing, parameter adjustment and other operations on multiple photocatalytic air purification devices on the control panel, which greatly saves operation time and energy and improves work efficiency.

[0009] Preferably, the photocatalytic component includes a limit plate, which is fixedly installed inside the box, and a transmission block is slidably installed inside the limit plate. An ultraviolet lamp is fixedly installed on the bottom of the transmission block. The ultraviolet lamp is electrically connected to an external power supply through a catalytic switch. The ultraviolet photons emitted by the ultraviolet lamp have high energy and can provide sufficient energy for the catalyst to keep it in a highly active state, thereby accelerating the photocatalytic reaction and more efficiently decomposing pollutants in the air.

[0010] Preferably, the transmission assembly includes a transmission screw, which is rotatably mounted on the top of the inner wall of the box body, and the middle part of the transmission screw is transmission-connected to the inner side of the transmission block. A knob is fixedly mounted on one end of the transmission screw, and the position of the ultraviolet lamp can be flexibly adjusted by the knob so that it can irradiate the photocatalyst at an optimal angle, ensuring that the photocatalytic reaction can be effectively carried out in the entire space, thereby improving the comprehensiveness and uniformity of air purification.

[0011] Preferably, the catalyst assembly includes a catalyst chamber. Two liquid storage tanks are provided inside the catalyst chamber. The catalyst chamber is fixedly installed at the bottom of the inner wall of the box body. An infusion tube is externally connected between the two liquid storage tanks. The middle of the infusion tube penetrates through the box body and the limiting plate. One end of the infusion tube is threadedly connected with a tube cap. By placing two different catalysts in the photocatalytic air purification device, their respective advantages can be utilized to achieve more comprehensive and efficient degradation of various pollutants, expand the scope and effect of air purification, and improve the quality of air purification.

[0012] Preferably, the stirring assembly includes two axles. The two axles are respectively rotatably installed inside the two liquid storage tanks. One end of the axle is threadedly connected with a screwed sleeve. A stirring blade is fixedly installed at the top of the screwed sleeve. The other end of the axle is fixedly installed with a gear. In the middle of one side of one of the gears, a stirring motor is fixedly installed. The stirring motor is fixedly installed at the top of the bottom plate. The stirring motor is electrically connected to an external power supply through a stirring switch. By dropping the catalyst into the chemical liquid and fully stirring, the chemical components in the liquid can react with these impurities, dissolve them or convert them into substances that can be removed, so that the active sites on the surface of the catalyst are re-exposed, restoring its catalytic ability for the photocatalytic reaction.

[0013] Preferably, the air inlet assembly includes a housing. The housing is fixedly installed on one side of the box body. An air inlet is provided on one side of the housing. Two mounting plates are fixedly installed inside the housing. An exhaust fan motor is fixedly installed between the two mounting plates. The output end of the exhaust fan motor is fixedly installed with a rotating blade. The exhaust fan motor is electrically connected to an external power supply through an air inlet switch. Compared with natural ventilation, the motor-driven air inlet and outlet can process a large amount of air in a short time, improve the air renewal frequency, so as to more efficiently remove pollutants in the air and shorten the time required for air purification.

[0014] Preferably, the filter screen assembly includes a filter screen plate. The filter screen plate is slidably installed inside the housing. A handle is fixedly installed on one side of the filter screen plate. A pressing block is fixedly installed on the other side of the filter screen plate. Installing the filter screen can block large particle pollutants in the air, such as dust, hair, fibers, etc., in advance. If these large particle substances directly enter the photocatalytic area, they may affect the propagation of light and the progress of the photocatalytic reaction, making the air entering the photocatalytic area cleaner and conducive to the better performance of the photocatalyst.

[0015] Preferably, the pressing and locking assembly includes a sliding shell fixedly installed inside the outer shell. A self-locking block is fixedly installed inside the sliding shell. A sliding block is slidably installed inside the sliding shell. A spring is fixedly installed at the bottom of the inner wall of the sliding shell. One side of the sliding block is rotatably installed with a rotating rod. One end of the rotating rod is fixedly installed with a locking rod. The top of the sliding block is fixedly connected with a clamping block. The filter net that is convenient for installation and disassembly enables maintenance personnel or users to quickly take it out for cleaning or replacement. For the filter net that has reached the service life or is damaged, a new one can also be quickly replaced, ensuring the continuous and stable operation of the air purification device, reducing the risk of equipment damage caused by filter net blockage or failure, thereby extending the overall service life of the photocatalytic air purification device and reducing the equipment replacement cost.

[0016] Compared with the prior art, the beneficial effects of the present invention are:

[0017] Through the catalyst assembly, by placing two different catalysts in the photocatalytic air purification device, their respective advantages can be utilized to achieve more comprehensive and efficient degradation of various pollutants, expand the scope and effect of air purification, improve the quality of air purification, and drip chemical liquid along the infusion tube when the activity of the catalyst is insufficient;

[0018] Through the stirring assembly, the catalyst is dropped into the chemical liquid and fully stirred. The chemical components in the liquid medicine can react with these impurities, dissolve them or convert them into substances that can be removed, so as to expose the active sites on the surface of the catalyst again and restore its catalytic ability for the photocatalytic reaction;

[0019] Through the pressing and locking assembly, the filter net that is convenient for installation and disassembly enables maintenance personnel or users to quickly take it out for cleaning or replacement. For the filter net that has reached the service life or is damaged, a new one can also be quickly replaced, ensuring the continuous and stable operation of the air purification device, reducing the risk of equipment damage caused by filter net blockage or failure, thereby extending the overall service life of the photocatalytic air purification device and reducing the equipment replacement cost. Description of the Drawings

[0020] Figure 1 It is a three-dimensional structure diagram of the air purification device of the present invention;

[0021] Figure 2 It is a front view of the air purification device of the present invention;

[0022] Figure 3 It is a moving component diagram of the air purification device of the present invention;

[0023] Figure 4 It is a photocatalytic component diagram of the air purification device of the present invention;

[0024] Figure 5 The stirring component diagram of the air purification device of the present invention;

[0025] Figure 6 The filter screen component diagram of the air purification device of the present invention;

[0026] Figure 7 The air inlet component diagram of the air purification device of the present invention;

[0027] Figure 8 The pressing and locking component diagram of the air purification device of the present invention.

[0028] In the figure: 1, the box body; 2, the control panel; 3, the bottom plate; 4, the rotating seat; 5, the mounting rack; 6, the runner; 7, the catalyst bin; 8, the infusion tube; 9, the liquid storage tank; 10, the pipe cap; 11, the axis; 12, the screw sleeve; 13, the stirring blade; 14, the gear; 15, the stirring motor; 16, the limiting plate; 17, the transmission lead screw; 18, the knob; 19, the transmission block; 20, the ultraviolet irradiation lamp; 21, the air outlet; 22, the outer shell; 23, the air inlet; 24, the mounting plate; 25, the exhaust motor; 26, the rotating blade; 27, the filter screen plate; 28, the handle; 29, the pressing block; 30, the sliding shell; 31, the self-locking block; 32, the spring; 33, the sliding block; 34, the rotating rod; 35, the locking rod; 36, the clamping block. Specific embodiments

[0029] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention.

[0030] Please refer to Figure 1-8 , the present invention provides a photocatalytic air purification device, including a box body 1. Air outlets 21 are provided on both sides of the box body 1. An air inlet component for conveying air is fixedly installed outside one of the air outlets 21. A filter screen component and a pressing and locking component are installed inside the air inlet component. A moving component for moving is fixedly installed at the bottom of the box body 1. A photocatalytic component is installed inside the box body 1. A transmission component for moving the photocatalytic component is installed inside the photocatalytic component. A catalyst component is installed below the photocatalytic component. A stirring component for stirring the catalyst to restore its activity is installed at the bottom of the catalyst component.

[0031] Referring to Figure 3 , the moving component includes a bottom plate 3. Rotating seats 4 are rotatably installed at the four corners inside the bottom plate 3. Mounting racks 5 are fixedly installed at the bottoms of the rotating seats 4. Runners 6 are rotatably installed inside the four mounting racks 5. When it is necessary to move the device, the entire device is pushed, and the runners 6 at the four corners of the bottom rotate inside the mounting racks 5 to move the device to the designated position.

[0032] Referring to Figure 2, a control panel 2 is fixedly installed on the front of the box body 1. A catalytic switch, a stirring switch and an air inlet switch are fixedly installed on the surface of the control panel 2. The entire photocatalytic air purification can be centrally controlled through the control panel 2 on the box body 1. The ultraviolet irradiation lamp 20 can be controlled to work through the catalytic switch, the stirring motor 15 can be controlled to work through the stirring switch, and the exhaust fan motor 25 can be controlled to work through the air inlet switch.

[0033] Refer to Figure 4 , the photocatalytic component includes a limit plate 16. The limit plate 16 is fixedly installed inside the box body 1. A transmission block 19 is slidably installed inside the limit plate 16. An ultraviolet irradiation lamp 20 is fixedly installed at the bottom of the transmission block 19. The ultraviolet irradiation lamp 20 is electrically connected to an external power supply through the catalytic switch. When air purification is required, the ultraviolet irradiation lamp 20 is started by the catalytic switch on the control panel 2. The ultraviolet irradiation lamp 20 irradiates the catalyst in one of the liquid storage tanks 9 directly below, enabling it to absorb light energy for catalysis and purifying the air entering the box body 1.

[0034] Refer to Figure 4 , the transmission component includes a transmission lead screw 17. The transmission lead screw 17 is rotatably installed at the top of the inner wall of the box body 1. The middle of the transmission lead screw 17 is drivingly connected to the inside of the transmission block 19. One end of the transmission lead screw 17 is fixedly installed with a knob 18. When the ultraviolet irradiation lamp 20 needs to irradiate another catalyst due to different air environments, turn the knob 18 to drive the transmission lead screw 17 on one side to rotate inside the box body 1. The transmission lead screw 17 rotates to drive the outer transmission block 19 to slide along the limit plate 16. The transmission block 19 drives the ultraviolet irradiation lamp 20 at the bottom to move, so that it moves above another liquid storage tank 9 to irradiate another catalyst inside for air purification.

[0035] Refer to Figure 5 , the catalyst component includes a catalyst bin 7. Two liquid storage tanks 9 are opened inside the catalyst bin 7. The catalyst bin 7 is fixedly installed at the bottom of the inner wall of the box body 1. An infusion tube 8 is externally connected between the two liquid storage tanks 9. The middle of the infusion tube 8 penetrates through the box body 1 and the limit plate 16. One end of the infusion tube 8 is threadedly connected with a pipe cap 10. Two different catalysts are placed in the two liquid storage tanks 9 of the catalyst bin 7. The two catalysts can purify two different air conditions during catalysis. After long-term air purification, the catalyst will lose its activity. Unscrew the pipe cap 10 at the top of the box body 1 by hand, and pour the chemical liquid that can restore the activity of the catalyst through the port of the infusion tube 8. The chemical liquid flows into the two liquid storage tanks 9 along the infusion tube 8.

[0036] Refer to Figure 5, The stirring assembly includes two axles 11. The two axles 11 are respectively rotatably installed inside two liquid storage tanks 9. One end of the axle 11 is threadedly connected with a screwed sleeve 12. A stirring blade 13 is fixedly installed on the top of the screwed sleeve 12. The other end of the axle 11 is filed and installed with a gear 14. In the middle of one side of one of the gears 14, a stirring motor 15 is fixedly installed. The stirring motor 15 is fixedly installed on the top of the bottom plate 3. The stirring motor 15 is electrically connected to an external power supply through a stirring switch. After adding the chemical liquid that can restore the activity to the two catalysts, the stirring motor 15 is controlled to start working through the stirring switch on the control panel 2. The stirring motor 15 drives one of the gears 14 at the output end to rotate. When this gear 14 rotates, it meshes with the other gear 14 to rotate. The two gears 14 both drive the axles 11 at one end to rotate. The two axles 11 drive the two stirring blades 13 to fully stir the two catalysts inside the two liquid storage tanks 9 to restore their activity.

[0037] Refer to Figure 7 , The air inlet assembly includes a housing 22. The housing 22 is fixedly installed on one side of the box body 1. An air inlet 23 is opened on one side of the housing 22. Two mounting plates 24 are fixedly installed inside the housing 22. An exhaust fan motor 25 is filed and installed between the two mounting plates 24. A rotating blade 26 is filed and installed at the output end of the exhaust fan motor 25. The exhaust fan motor 25 is electrically connected to an external power supply through an air inlet switch. Through the air inlet switch on the control panel 2, the exhaust fan motor 25 is controlled to start. The exhaust fan motor 25 drives the rotating blade 26 at the output end to rotate, allowing the external air to enter the inside of the housing 22 through the air inlet 23, and then enter the inside of the box body 1 along the air outlet 21 on one side of the box body 1. The air entering the inside of the box body 1 is purified by photocatalysis and then discharged through the air outlet 21 on the other side. In this way, the air purification is completed reciprocally.

[0038] Refer to Figure 6 , The filter screen assembly includes a filter screen plate 27. The filter screen plate 27 is slidably installed inside the housing 22. A handle 28 is fixedly installed on one side of the filter screen plate 27. A pressing block 29 is fixedly installed on the other side of the filter screen plate 27. When the air enters the inside of the housing 22 through the air inlet 23, the filter screen plate 27 blocks large particles or impurities in the air to prevent the dirt in the air from entering the inside of the box body 1 and affecting the purification function.

[0039] Refer to Figure 8, the pressing and locking component includes a sliding shell 30 which is fixedly installed inside the outer shell 22. A self-locking block 31 is fixedly installed inside the sliding shell 30. A sliding block 33 is slidably installed inside the sliding shell 30. A spring 32 is fixedly installed at the bottom of the inner wall of the sliding shell 30 at the bottom of the sliding block 33. A rotating rod 34 is rotatably installed on one side of the sliding block 33. A locking rod 35 is fixedly installed at one end of the rotating rod 34. A clamping block 36 is fixedly connected to the top of the sliding block 33. When installing the filter screen plate 27, place the filter screen plate 27 at the installation opening of the outer shell 22 and push it forward through the handle 28. The filter screen plate 27 slides along the inside of the outer shell 22 to drive the pressing block 29 on one side to move synchronously. The pressing block 29 continues to move forward to apply pressure to the sliding block 33. The sliding block 33 slides along the inside of the sliding shell 30 to drive the rotating rod 34 to move synchronously. The locking rod 35 at one end of the rotating rod 34 is squeezed by the self-locking block 31 during movement, so that it enters the inside of the self-locking block 31 along the groove of the self-locking block 31 to complete the locking. The clamping block 36 is made of slightly deformable plastic material and is clamped and locked to the pressing block 29 by being squeezed by the sliding shell 30 when being driven by the sliding block 33. At the same time, the spring 32 is subjected to the squeezing force. After a long time of purifying the air, it is necessary to clean the filter screen plate 27. At this time, press the filter screen plate 27 inward again through the handle 28. The locking rod 35 slides along the second half of the groove of the self-locking block 31 to complete the detachment. At this time, the spring 32 releases the squeezing force to reset the sliding block 33. When the sliding block 33 resets, it drives the clamping block 36 to release the extrusion by the sliding shell 30. The clamping block 36 returns to its original state to release the locking of the pressing block 29, and the disassembly of the filter screen plate 27 is completed.

[0040] When the embodiment of the present application is in use: Two different catalysts are placed in the two liquid storage tanks 9 of the catalyst chamber 7. The two catalysts can purify two different air conditions during catalysis. When air purification is required, the ultraviolet irradiation lamp 20 is controlled to start through the catalysis switch on the control panel 2. The ultraviolet irradiation lamp 20 irradiates the catalyst inside one of the liquid storage tanks 9 directly below it, enabling it to absorb light energy for catalysis. The air intake switch on the control panel 2 is used to control the start of the exhaust fan motor 25. The exhaust fan motor 25 drives the rotating blade 26 at the output end to rotate, drawing external air into the housing 22 through the air intake port 23, and then entering the interior of the box body 1 along the air outlet 21 on one side of the box body 1. The air entering the interior of the box body 1 is purified through photocatalysis and then discharged through the air outlet 21 on the other side, thus reciprocating to complete the air purification. When the air enters the housing 22 through the air intake port 23, the filter mesh plate 27 blocks large particles or impurities in the air to prevent dirt in the air from entering the interior of the box body 1 and affecting the purification function. When the ultraviolet irradiation lamp 20 needs to irradiate another catalyst due to different air environments, the knob 18 is turned to drive the transmission lead screw 17 on one side to rotate inside the box body 1. The transmission lead screw 17 rotates to drive the transmission block 19 on the outside to slide along the limiting plate 16. The transmission block 19 drives the ultraviolet irradiation lamp 20 at the bottom to move, so that it moves above another liquid storage tank 9 to irradiate the other catalyst inside for air purification. When installing the filter mesh plate 27, the filter mesh plate 27 is placed at the installation opening of the housing 22 and pushed forward by the handle 28. The filter mesh plate 27 slides along the interior of the housing 22, driving the pressing block 29 on one side to move synchronously. The pressing block 29 continues to move forward to apply pressure to the sliding block 33. The sliding block 33 slides along the interior of the sliding housing 30, driving the rotating rod 34 to move synchronously. The locking rod 35 at one end of the rotating rod 34 is squeezed by the self-locking block 31 during movement, causing it to enter the interior of the self-locking block 31 along the groove of the self-locking block 31 to complete the locking. The clamping block 36 is made of a slightly deformable plastic material. When being driven by the sliding block 33 and sliding down, it is squeezed by the sliding housing 30 to clamp and lock the pressing block 29. At the same time, the spring 32 is subjected to the squeezing force. After a long time of purifying air, when the filter mesh plate 27 needs to be cleaned, the filter mesh plate 27 is pressed inward again by the handle 28. The locking rod 35 slides along the latter half of the groove of the self-locking block 31 to complete the detachment. At this time, the spring 32 releases the squeezing force to reset the sliding block 33. When the sliding block 33 resets, it drives the clamping block 36 to relieve the extrusion by the sliding housing 30, and the clamping block 36 returns to its original state to release the locking of the pressing block 29, completing the disassembly of the filter mesh plate 27. After a long time of purifying air, the catalyst will lose its activity. The pipe cap 10 at the top of the box body 1 is unscrewed by hand, and the chemical liquid that can make the catalyst regain its activity is poured into the port of the infusion tube 8. The chemical liquid flows into the two liquid storage tanks 9 along the infusion tube 8.After adding the chemical liquid for restoring the activity to the interiors of the two catalysts, the stirring motor 15 is controlled to start working through the stirring switch on the control panel 2. The stirring motor 15 drives a gear 14 at the output end to rotate. When this gear 14 rotates, it meshes with another gear 14 to rotate. Both gears 14 drive the axles 11 at one end to rotate. The two axles 11 drive the two stirring blades 13 to fully stir the two catalysts inside the two liquid storage tanks 9, so as to restore their activity.

[0041] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements for some of the technical features. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A photocatalytic air purification device, comprising a housing (1), characterized in that: Air vents (21) are provided on both sides of the housing (1), an air inlet assembly for conveying air is fixedly installed on the outside of one of the air vents (21), a filter assembly and a push-lock assembly are installed inside the air inlet assembly, a moving assembly for moving is fixedly installed on the bottom of the housing (1), a photocatalytic assembly is installed inside the housing (1), a transmission assembly for moving the photocatalytic assembly is installed inside the photocatalytic assembly, a catalyst assembly is installed below the photocatalytic assembly, and a stirring assembly for stirring the catalyst to restore its activity is installed at the bottom of the catalyst assembly.

2. A photocatalytic air purification device according to claim 1, characterized in that: The moving assembly comprises a base plate (3), four corners of the base plate (3) are rotatably mounted with a rotating seat (4), a mounting frame (5) is fixedly mounted at the bottom of the rotating seat (4), and rotating wheels (6) are rotatably mounted inside the four mounting frames (5).

3. A photocatalytic air purification device according to claim 1, characterized in that: A control panel (2) is fixedly mounted on the front of the box (1), and a catalytic switch, a stirring switch and an air inlet switch are fixedly mounted on the surface of the control panel (2).

4. A photocatalytic air purification device according to claim 3, characterized in that: The photocatalytic component comprises a limit plate (16), the limit plate (16) is fixedly mounted inside the box (1), a transmission block (19) is slidably mounted inside the limit plate (16), an ultraviolet irradiation lamp (20) is fixedly mounted at the bottom of the transmission block (19), and the ultraviolet irradiation lamp (20) is electrically connected to an external power supply via a catalytic switch.

5. A photocatalytic air purification device according to claim 4, characterized in that: The transmission assembly comprises a transmission screw (17), the transmission screw (17) is rotatably mounted on the top of the inner wall of the box body (1), the middle part of the transmission screw (17) is transmission-connected to the inner side of a transmission block (19), and a knob (18) is fixedly mounted on one end of the transmission screw (17).

6. The photocatalytic air purification device according to claim 1, characterized in that: The catalyst assembly comprises a catalyst bin (7), two liquid storage tanks (9) are provided inside the catalyst bin (7), the catalyst bin (7) is fixedly mounted on the bottom of the inner wall of the box body (1), the outside of the two liquid storage tanks (9) is connected with a liquid infusion pipe (8), the middle part of the liquid infusion pipe (8) passes through the box body (1) and the limit plate (16), and one end of the liquid infusion pipe (8) is threadedly connected with a pipe cover (10).

7. A photocatalytic air purification device according to claim 6, characterized in that: The stirring assembly comprises two shafts (11), the two shafts (11) are rotatably mounted inside two liquid tanks (9) respectively, one end of the shaft (11) is threadedly connected with a screw sleeve (12), a stirring blade (13) is fixedly mounted on the top of the screw sleeve (12), and a gear (14) is archived and mounted on the other end of the shaft (11), a stirring motor (15) is fixedly mounted in the middle of one side of one of the gears (14), the stirring motor (15) is fixedly mounted on the top of the bottom plate (3), and the stirring motor (15) is electrically connected to an external power supply through a stirring switch.

8. The photocatalytic air purification device according to claim 1, characterized in that: The air inlet assembly comprises a shell (22), the shell (22) is fixedly mounted on one side of the housing (1), an air inlet (23) is provided on one side of the shell (22), two mounting plates (24) are fixedly mounted inside the shell (22), an exhaust motor (25) is mounted between the two mounting plates (24), a rotating blade (26) is mounted at the output end of the exhaust motor (25), and the exhaust motor (25) is electrically connected to an external power supply via an air inlet switch.

9. A photocatalytic air purification device according to claim 8, characterized in that: The filter screen assembly comprises a filter screen plate (27), wherein the filter screen plate (27) is slidably mounted inside the housing (22), a handle (28) is fixedly mounted on one side of the filter screen plate (27), and a pressing block (29) is fixedly mounted on the other side of the filter screen plate (27).

10. A photocatalytic air purification device according to claim 8, characterized in that: The push-locking assembly comprises a sliding shell (30), wherein the sliding shell (30) is fixedly mounted inside the outer shell (22), a self-locking block (31) is fixedly mounted inside the sliding shell (30), a sliding block (33) is slidably mounted inside the sliding shell (30), a spring (32) is fixedly mounted at the bottom of the sliding block (33), the spring (32) is fixedly mounted at the bottom of the inner wall of the sliding shell (30), a rotating rod (34) is rotatably mounted on one side of the sliding block (33), a locking rod (35) is fixedly mounted on one end of the rotating rod (34), and a clamping block (36) is fixedly connected to the top of the sliding block (33).

Images