Environment-friendly UV photocatalysis equipment

Abstract

The environment-friendly UV photocatalysis equipment comprises an equipment shell and four supporting legs fixedly connected to the bottom of the equipment shell, a gas inlet assembly used for introducing waste gas into the equipment is fixedly installed in the middle of the bottom end of the equipment shell, and an equipment top plate is fixedly installed at the top of the equipment shell; an exhaust pipe is arranged in the middle of the top end of the equipment top plate, a plurality of photocatalytic plates are laid on the inner wall of the equipment shell, a self-cleaning ultraviolet lamp set mechanism used for providing ultraviolet light is fixedly installed in the equipment shell, and a control panel is fixedly installed on the front face of the equipment shell. According to the device, the cylindrical ultraviolet lamp tube group is placed in the center of the interior of the device, a plurality of ultraviolet lamp tubes are encircled to form a circle and uniformly irradiate a photocatalytic plate, so that the device has a remarkable effect on treatment of oil fume, and the ultraviolet lamp group is covered by the cylindrical glass cover made of a quartz material, so that the adhesion of the oil fume can be prevented.

Description

Technical Field

[0001] The present invention relates to the technical field of photocatalysis, and specifically to an environment-friendly UV photocatalytic device. Background Art

[0002] The oils, organic matters and their thermal decomposition or cracking products volatilized during food cooking and processing are collectively called oil fume. The emission of oil fume into the atmosphere will cause air pollution, affect air quality, and may also have certain negative impacts on the surrounding plants and other ecological environments. Therefore, a UV photocatalytic device is needed.

[0003] The existing photocatalytic devices mainly consist of a metal structure part, an electric control system, a reaction system, etc., and can react and treat oil fume. The ultraviolet lamp tubes in the photocatalytic device can emit high-energy photons. When the high-energy ultraviolet light irradiates the oil fume molecules, the chemical bonds in the oil fume molecules can be broken, and the high-molecular organic compounds can be degraded into low-molecular compounds. At the same time, under the action of ultraviolet light, a large number of reactive oxygen species such as hydroxyl radicals will be generated by the photocatalyst, and these reactive oxygen species can further decompose the oil fume particles into harmless substances such as carbon dioxide and water. However, the above common UV photocatalytic devices still have deficiencies:

[0004] Traditional photocatalytic devices are generally square in structure, with photocatalytic plates distributed inside and many ultraviolet lamp tubes installed inside. When treating oil fume for a long time, the oil fume will adhere to the surface of the ultraviolet lamp tubes. Therefore, we need to regularly wipe the ultraviolet lamp tubes. The attachment of oil stains on the ultraviolet lamp tubes will seriously affect the purification treatment of oil fume, and when manually wiping the ultraviolet lamp tubes, it is time-consuming and laborious, and at the same time, the ultraviolet lamp tubes may be damaged during the wiping process. Summary of the Invention

[0005] The purpose of the present invention is to provide an environment-friendly UV photocatalytic device to solve the problems in the above background art that traditional photocatalytic devices are generally square in structure, with photocatalytic plates distributed inside and many ultraviolet lamp tubes installed inside. When treating oil fume for a long time, the oil fume will adhere to the surface of the ultraviolet lamp tubes. Therefore, we need to regularly wipe the ultraviolet lamp tubes. The attachment of oil stains on the ultraviolet lamp tubes will seriously affect the purification treatment of oil fume, and when manually wiping the ultraviolet lamp tubes, it is time-consuming and laborious, and at the same time, the ultraviolet lamp tubes may be damaged during the wiping process.

[0006] To achieve the above object, the present invention provides the following technical solution: An environment-friendly UV photocatalytic device, comprising a device housing and four support legs fixedly connected to the bottom of the device housing. In the middle of the bottom end of the device housing, an air intake assembly for introducing waste gas into the device is fixedly installed. On the top of the device housing, a device top plate is fixedly installed. In the middle of the top end of the device top plate, an exhaust pipe is provided. A plurality of photocatalytic plates are laid on the inner wall of the device housing. Inside the device housing, a self-cleaning ultraviolet lamp group mechanism for providing ultraviolet light is fixedly installed. On the front of the device housing, a control panel is fixedly installed.

[0007] Preferably, the air intake assembly includes four connecting plates and an air intake box. The four connecting plates are all fixedly connected to the device housing. One end of each of the four connecting plates is fixedly connected to the surface of the air intake box. A plurality of connecting pipes are fixedly communicated between the device housing and the air intake box. One end of the air intake box is fixedly communicated with an air inlet pipe.

[0008] Preferably, the self-cleaning ultraviolet lamp group mechanism includes a mounting base and an upper end seat. A quartz glass cover is fixedly installed between the mounting base and the upper end seat. A limiting ring is fixedly connected to the surface of the mounting base.

[0009] Preferably, a plurality of ultraviolet lamp tubes are arranged inside the quartz glass cover. A speed reducer is fixedly installed at the bottom of the upper end seat. All the plurality of ultraviolet lamp tubes are fixedly installed on the mounting base.

[0010] Preferably, the output end of the speed reducer is fixedly connected to a rotating rod. One end of the rotating rod is fixedly connected to a cross-shaped support plate. In the middle of the top end of the upper end seat, a gear sleeve is fixedly connected. The rotating rod and the gear sleeve are coaxial.

[0011] Preferably, a transmission assembly is fixedly installed at the bottom of the cross-shaped support plate. Rotating holes are formed at the four corners of the cross-shaped support plate. Inside each of the four rotating holes, a driven assembly is rotatably connected.

[0012] Preferably, the transmission assembly includes a gear rod. A transmission disc is fixedly connected to one side of the gear rod. The gear rod is rotatably connected to the cross-shaped support plate. One side of the gear rod is meshed with one side of the gear sleeve.

[0013] Preferably, the driven assembly includes a driven shaft rod. The driven shaft rod is rotatably connected inside the rotating hole. In the middle of the surface of the driven shaft rod, a driven disc is fixedly connected. A transmission belt is connected between the transmission disc and the driven disc. One end of the driven shaft rod is fixedly connected to a connecting hole block. Inside the connecting hole block, a cleaning rod is fixedly connected. A cleaning cotton layer is arranged on the surface of the cleaning rod. The surface of the cleaning cotton layer is in contact connection with the surface of the quartz glass cover. A steel ball is arranged at one end of the cleaning rod.

[0014] Preferably, the surface of the steel ball is in rolling connection with the surface of the limit ring, and a plurality of drain grooves are formed on the outer side of the limit ring.

[0015] Preferably, a circular groove is formed on the outer side of the upper end seat, a water storage tank is arranged inside the circular groove, a cleaning liquid for cleaning stains is arranged inside the water storage tank, a plurality of cylindrical support rods are fixedly connected to the inner wall of the circular groove, one ends of the plurality of cylindrical support rods are fixedly connected to one side of the water storage tank, and a plurality of water outlet pipes are fixedly communicated with the bottom of the water storage tank, and electromagnetic valves are fixedly installed at one ends of the plurality of water outlet pipes.

[0016] Compared with the prior art, the beneficial effects of the present invention are as follows: a standing photocatalytic device is provided, a plurality of photocatalytic plates are laid on the inner wall of the device, a cylindrical ultraviolet lamp group is placed in the center of the device, and a plurality of ultraviolet lamp tubes are arranged in a circle to uniformly irradiate the photocatalytic plates, which has a remarkable effect on the treatment of oil fume. Moreover, this ultraviolet lamp group is covered by a cylindrical glass cover made of quartz material, which can prevent the attachment of oil fume;

[0017] And a self-cleaning device for the quartz glass cover is provided. Although the oil fume cannot adhere to the ultraviolet lamp tubes, it will still affect the effect of the ultraviolet lamp group if it adheres to the quartz glass cover. Therefore, a self-cleaning device for the quartz glass cover is provided, which is convenient and labor-saving during cleaning, has high practicability, and can also avoid the artificial damage of the lamp tubes. Description of the Drawings

[0018] Figure 1 is a structural diagram of the photocatalytic device of the present invention;

[0019] Figure 2 is a structural diagram of the self-cleaning ultraviolet lamp group mechanism of the photocatalytic device of the present invention;

[0020] Figure 3 is a partial enlarged view A of the self-cleaning ultraviolet lamp group mechanism of the photocatalytic device of the present invention;

[0021] Figure 4 is a partial enlarged view B of the self-cleaning ultraviolet lamp group mechanism of the photocatalytic device of the present invention;

[0022] Figure 5 is a structural diagram of the inside of the quartz glass cover of the photocatalytic device of the present invention;

[0023] Figure 6 is a structural diagram of the transmission component of the photocatalytic device of the present invention;

[0024] Figure 7 is a structural diagram of the driven component of the photocatalytic device of the present invention;

[0025] Figure 8 is a structural diagram of the cleaning liquid component of the photocatalytic device of the present invention

[0026] In the figure: 1, equipment housing; 2, intake box; 3, connecting plate; 4, connecting pipe; 5, intake pipe; 6, control panel; 7, photocatalytic plate; 8, mounting base; 9, ultraviolet lamp tube; 10, upper end seat; 11, quartz glass cover; 12, equipment top plate; 13, exhaust pipe; 14, gear sleeve; 15, circular groove; 16, cylindrical support rod; 17, water storage tank; 18, water outlet pipe; 19, solenoid valve; 20, rotating rod; 21, cross support plate; 22, gear rod; 23, drive disk; 24, drive belt; 25, driven shaft rod; 26, driven disk; 27, connecting hole block; 28, cleaning rod; 29, cleaning cotton layer; 30, steel ball; 31, limiting ring; 32, drainage groove. Specific embodiments

[0027] 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.

[0028] Please refer to Figure 1-8 , the present invention provides an environment-friendly UV photocatalytic equipment, including an equipment housing 1 and four support legs fixedly connected to the bottom of the equipment housing 1. A middle part of the bottom end of the equipment housing 1 is fixedly installed with an intake assembly for introducing waste gas into the equipment. A top of the equipment housing 1 is fixedly installed with an equipment top plate 12. A middle part of the top end of the equipment top plate 12 is provided with an exhaust pipe 13. A plurality of photocatalytic plates 7 are laid on an inner wall of the equipment housing 1. An inner part of the equipment housing 1 is fixedly installed with a self-cleaning ultraviolet lamp group mechanism for providing ultraviolet light. A front surface of the equipment housing 1 is fixedly installed with a control panel 6.

[0029] Refer to Figure 1 , further, the intake assembly includes four connecting plates 3 and an intake box 2. The four connecting plates 3 are all fixedly connected to the equipment housing 1. One ends of the four connecting plates 3 are all fixedly connected to a surface of the intake box 2. A plurality of connecting pipes 4 are fixedly communicated between the equipment housing 1 and the intake box 2. One end of the intake box 2 is fixedly communicated with an intake pipe 5;

[0030] During use, when treating oil fume gas, the gas needs to be first introduced into the interior of the photocatalytic device. There are multiple connecting plates 3 connected to the bottom of the device housing 1. One end of the multiple connecting plates 3 is provided with an air inlet box 2. The top of the air inlet box 2 is fixedly communicated with multiple communicating pipes 4, and all the communicating pipes 4 are communicated with the interior of the device housing 1. Since there is a ultraviolet lamp assembly inside the device housing 1, which blocks a part of the incoming position, it is necessary to communicate the input oil fume gas at the position of the bottom edge. One end of the air inlet box 2 is fixedly communicated with an air inlet pipe 5, and the air inlet pipe 5 is connected to the external oil fume gas input pipeline. The oil fume gas enters the interior of the air inlet box 2 through the air inlet pipe 5, and then the oil fume inside the air inlet box 2 enters the interior of the device housing 1 through several communicating pipes 4 that are communicated, for oil fume purification treatment.

[0031] Refer to Figure 2-8, Further, the self-cleaning ultraviolet lamp group mechanism includes a mounting base 8 and an upper end seat 10. A quartz glass cover 11 is fixedly installed between the mounting base 8 and the upper end seat 10. A limiting ring 31 is fixedly connected to the surface of the mounting base 8. A plurality of ultraviolet lamp tubes 9 are arranged inside the quartz glass cover 11. A speed reducer is fixedly installed at the bottom of the upper end seat 10. A plurality of ultraviolet lamp tubes 9 are all fixedly installed on the mounting base 8. The output end of the speed reducer is fixedly connected to a rotating rod 20. One end of the rotating rod 20 is fixedly connected to a cross-shaped support plate 21. The middle part of the top end of the upper end seat 10 is fixedly connected to a gear sleeve 14. The rotating rod 20 is coaxial with the gear sleeve 14. A transmission component is fixedly installed at the bottom of the cross-shaped support plate 21. Rotating holes are formed at the four corners of the cross-shaped support plate 21. Driven components are rotatably connected inside the four rotating holes. The transmission component includes a gear rod 22. One side of the gear rod 22 is fixedly connected to a transmission disc 23. The gear rod 22 is rotatably connected to the cross-shaped support plate 21. One side of the gear rod 22 is meshed with one side of the gear sleeve 14. The driven component includes a driven shaft rod 25. The driven shaft rod 25 is rotatably connected inside the rotating hole. A driven disc 26 is fixedly connected to the middle part of the surface of the driven shaft rod 25. A transmission belt 24 is connected between the transmission disc 23 and the driven disc 26. One end of the driven shaft rod 25 is fixedly connected to a connecting hole block 27. A cleaning rod 28 is fixedly connected inside the connecting hole block 27. A cleaning cotton layer 29 is arranged on the surface of the cleaning rod 28. The surface of the cleaning cotton layer 29 is in contact connection with the surface of the quartz glass cover 11. A steel ball 30 is arranged at one end of the cleaning rod 28. The surface of the steel ball 30 is in rolling connection with the surface of the limiting ring 31. A plurality of drainage grooves 32 are formed on the outer side of the limiting ring 31. A circular groove 15 is formed on the outer side of the upper end seat 10. A water storage tank 17 is arranged inside the circular groove 15. A cleaning liquid for cleaning stains is arranged inside the water storage tank 17. A plurality of cylindrical support rods 16 are fixedly connected to the inner wall of the circular groove 15. One end of each of the plurality of cylindrical support rods 16 is fixedly connected to one side of the water storage tank 17. The bottom of the water storage tank 17 is fixedly communicated with a plurality of water outlet pipes 18. Solenoid valves 19 are fixedly installed at one end of each of the plurality of water outlet pipes 18;

[0032] During use, the ultraviolet lamp tube 9 inside the photocatalytic device can emit high-energy photons. When the high-energy ultraviolet light irradiates the oil fume molecules, it can break the chemical bonds in the oil fume molecules, causing the high-molecular organic compounds to be degraded into low-molecular compounds. At the same time, under the action of ultraviolet light, the photocatalyst on the photocatalytic plate 7 will generate a large number of reactive oxygen species such as hydroxyl radicals. These reactive oxygen species can further decompose the oil fume particles into harmless substances such as carbon dioxide and water. In this device, a photocatalytic plate 7 is laid inside the device housing 1, and a plurality of ultraviolet lamp tubes 9 are fixedly installed in the center of the device interior. The plurality of ultraviolet lamp tubes 9 are arranged in a circular pattern. These several ultraviolet lamp tubes 9 are installed on the mounting base 8, and a quartz glass cover 11 is provided above the mounting base 8. An upper end seat 10 is fixedly installed at the top of the quartz glass cover 11, which can prevent the oil fume from directly adhering to the ultraviolet lamp tube 9 and avoid human damage to the ultraviolet lamp tube 9 when cleaning the ultraviolet lamp tube 9. During long-term use, although the oil fume can still adhere to the quartz glass cover 11, it will also affect the treatment of the ultraviolet lamp tube 9 and the photocatalytic plate 7. Therefore, when cleaning is required, a cleaning switch is fixedly installed on the surface of the control panel 6. The speed reducer and the solenoid valve 19 are electrically connected to an external power supply through the cleaning switch. At this time, the speed reducer and the solenoid valve 19 are started through the cleaning switch, and the solenoid valve 19 opens. The cleaning liquid for cleaning the oil stain stored in advance in the water storage tank 17. A circular groove 15 is opened on the upper end seat 10, and a plurality of cylindrical support rods 16 are fixedly connected inside the circular groove 15. The water storage tank 17 is installed on the cylindrical support rods 16, which can provide space for the water outlet pipe 18 and the solenoid valve 19. The water outlet pipe 18 and the solenoid valve 19 face downward. Therefore, after the solenoid valve 19 is opened, the cleaning liquid flows onto the circular groove 15 and then flows along the outer side of the upper end seat 10 to the surface of the quartz glass cover 11. The upper end seat 10 and the quartz glass cover 11 are flush, so the cleaning liquid can flow onto the quartz glass cover 11. At the same time, the speed reducer rotates to drive the rotating rod 20 to rotate. The cross-shaped support plate 21 is fixedly connected to the rotating rod 20, and the cross-shaped support plate 21 also rotates. A gear sleeve 14 is fixedly connected to the upper end seat 10. The gear sleeve 14 is coaxial with the rotating rod 20. Teeth are provided at one end of the gear sleeve 14. Gear rods 22 are rotatably connected to the bottoms of the four sides of the cross-shaped support plate 21. One end of the gear rod 22 is a gear end, and this gear end is meshed with the teeth on the gear sleeve 14. Therefore, when the gear sleeve 14 is fixed, the cross-shaped support plate 21 drives the gear rod 22 to rotate around the gear sleeve 14 in a meshed state, which can cause the gear rod 22 to rotate. A transmission disk 23 is fixedly connected to one side of the gear rod 22. Rotation holes are opened at the edges of the four corners of the cross-shaped support plate 21, and driven shaft rods 25 are rotatably connected inside the rotation holes. A driven disk 26 is fixedly connected to the surface of the driven shaft rod 25. A transmission belt 24 is connected between the transmission disk 23 and the driven disk 26. Under the action of the transmission belt 24, the transmission disk 23 rotates to drive the driven disk 26 to rotate.The rotation of the driven disk 26 drives the driven shaft rod 25 to rotate inside the rotation hole. Therefore, the connection hole block 27 rotates, so that the connection hole block 27 can rotate around the quartz glass cover 11 while rotating around its own axis. At this time, a cleaning rod 28 is fixedly installed inside the connection hole block 27, and the cleaning rod 28 is fixedly connected to the connection hole block 27. Therefore, the cleaning rod 28 follows the connection hole block 27 to rotate around the quartz glass cover 11 while rotating around its own axis. A limiting ring 31 is fixedly connected to the surface of the installation base 8. A steel ball 30 is installed at the bottom of the cleaning rod 28. The steel ball 30 can rotate freely at the end of the cleaning rod 28. The steel ball 30 is in rolling connection with the surface of the limiting ring 31, which is beneficial to the stability of the cleaning rod 28 during use. There is a raised ring on the outer side of the limiting ring 31, which can effectively limit the cleaning rod 28 so that it can work stably. And a cleaning cotton layer 29 is provided on the surface of the cleaning rod 28. The cleaning cotton layer 29 is in contact connection with the surface of the quartz glass cover 11. The cleaning cotton layer 29 cooperates with the cleaning liquid on the surface of the quartz glass cover 11 for cleaning. The mixture of the excess cleaning liquid and oil stains can be discharged through the drain groove 32 on the limiting ring 31. A small hole for cleaning is provided at the bottom of the air inlet box 2. Remove the plug inside the small hole, and the water inside can be discharged. The water inside enters the air inlet box 2 through the connecting pipe 4. After the cleaning is completed, turn off the solenoid valve 19 and the reducer through the cleaning switch, and the cleaning is completed.

[0033] When the embodiment of the present application is in use: the waste gas is introduced into the air inlet box 2 through the air inlet pipe 5. The gas inside the air inlet box 2 enters the equipment through the connecting pipe 4. The ultraviolet lamp tube 9 and the photocatalytic plate 7 purify the incoming oil fume. The processed gas is discharged through the exhaust pipe 13 on the equipment top plate 12. There are only four cleaning rods 28 in the self-cleaning component. Because the cleaning rod 28 can rotate around the quartz glass cover 11, there is no need for too many cleaning rods 28. And too many cleaning rods 28 will block the ultraviolet light, which is not conducive to the treatment effect of the oil fume gas. The cleaning cotton layer 29 can be cleaned or replaced regularly, which is very convenient and fast. It should be noted that the present invention is an environment-friendly UV photocatalytic equipment. The components are all common standard parts or parts known to those skilled in the art. Its structure and principle can be known by those skilled in the art through technical manuals or by conventional experimental methods. At the idle place of this device, all the above-mentioned electrical components, which refer to power components, electrical components, and the adapted monitoring computer and power supply, are connected by wires. For the specific connection means, reference should be made to the above working principle, and the electrical connection should be completed according to the sequence of work among the electrical components. The detailed connection means is the well-known technology in the art.

[0034] 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. An environment-friendly UV photocatalytic device, comprising a device housing (1) and four support legs fixedly connected to the bottom of the device housing (1), characterized in that: An air intake assembly for introducing exhaust gas into the device is fixedly installed in the middle of the bottom end of the device housing (1), a device top plate (12) is fixedly installed on the top of the device housing (1), an exhaust pipe (13) is arranged in the middle of the top end of the device top plate (12), a plurality of photocatalytic plates (7) are laid on the inner wall of the device housing (1), a self-cleaning ultraviolet lamp group mechanism for providing ultraviolet light is fixedly installed inside the device housing (1), and a control panel (6) is fixedly installed on the front of the device housing (1).

2. The environmentally friendly UV photocatalytic equipment according to claim 1, characterized in that: The air intake assembly comprises four connecting plates (3) and an air intake box (2); the four connecting plates (3) are all fixedly connected to the device housing (1); one end of the four connecting plates (3) is all fixedly connected to the surface of the air intake box (2); a plurality of connecting pipes (4) are fixedly connected between the device housing (1) and the air intake box (2); and one end of the air intake box (2) is fixedly connected to an air intake pipe (5).

3. An environment-friendly UV photocatalytic device according to claim 1, characterized in that: The self-cleaning ultraviolet lamp assembly mechanism comprises a mounting base (8) and an upper end seat (10), a quartz glass cover (11) is fixedly mounted between the mounting base (8) and the upper end seat (10), and a limiting ring (31) is fixedly connected to the surface of the mounting base (8).

4. An environment-friendly UV photocatalytic device according to claim 3, characterized in that: A plurality of ultraviolet light tubes (9) are arranged inside the quartz glass cover (11), a reducer is fixedly mounted on the bottom of the upper end seat (10), and the plurality of ultraviolet light tubes (9) are fixedly mounted on the mounting base (8).

5. An environment-friendly UV photocatalytic device according to claim 4, characterized in that: The output end of the reducer is fixedly connected to a rotating rod (20), one end of the rotating rod (20) is fixedly connected to a cross support plate (21), the middle of the top end of the upper end seat (10) is fixedly connected to a gear sleeve (14), and the rotating rod (20) is coaxial with the gear sleeve (14).

6. The environmentally friendly UV photocatalytic device according to claim 5, characterized in that: A transmission assembly is fixedly mounted on the bottom of the cross support plate (21), and rotation holes are provided at four corners of the cross support plate (21), and driven assemblies are rotatably connected inside the four rotation holes.

7. An environment-friendly UV photocatalytic device according to claim 6, characterized in that: The transmission assembly comprises a gear rod (22), one side of the gear rod (22) is fixedly connected to a transmission plate (23), the gear rod (22) is rotatably connected to a cross support plate (21), and one side of the gear rod (22) is meshingly connected to one side of a gear sleeve (14).

8. An environment-friendly UV photocatalytic device according to claim 7, characterized in that: The driven assembly comprises a driven shaft (25), the driven shaft (25) is rotatably connected inside the rotating hole, a driven disc (26) is fixedly connected to the middle of the surface of the driven shaft (25), a transmission belt (24) is transmission-connected between the transmission disc (23) and the driven disc (26), one end of the driven shaft (25) is fixedly connected to a connecting hole block (27), the inside of the connecting hole block (27) is fixedly connected to a cleaning rod (28), a cleaning cotton layer (29) is arranged on the surface of the cleaning rod (28), the surface of the cleaning cotton layer (29) is in contact with the surface of the quartz glass cover (11), and a steel ball (30) is arranged on one end of the cleaning rod (28).

9. An environment-friendly UV photocatalytic device according to claim 8, characterized in that: The surface of the steel ball (30) is in rolling connection with the surface of the limit ring (31), and a plurality of drain grooves (32) are formed on the outer side of the limit ring (31).

10. An environment-friendly UV photocatalytic device according to claim 3, characterized in that: A circular groove (15) is formed on the outer side of the upper end seat (10). A water storage tank (17) is arranged inside the circular groove (15). A cleaning liquid for cleaning stains is arranged inside the water storage tank (17). A plurality of cylindrical support rods (16) are fixedly connected to the inner wall of the circular groove (15). One ends of the plurality of cylindrical support rods (16) are fixedly connected to one side of the water storage tank (17). A plurality of water outlet pipes (18) are fixedly communicated with the bottom of the water storage tank (17). Solenoid valves (19) are fixedly installed at one ends of the plurality of water outlet pipes (18).

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