A purification device for removing coating formaldehyde

Abstract

The present application relates to air purification technical field, especially to a kind of purification equipment for removing coating formaldehyde, including shell, mounting plate fixedly connected in the cavity of shell.The present application is provided with self-cleaning mechanism, driving motor drives scraper to rotate around filter assembly, and cooperate with spiral conveying roller, dust scraped is automatically transported into collection box, realize the automatic cleaning of filter screen surface, effectively avoid filter screen blockage, ensure the persistence of filtering efficiency, by setting air flow guiding mechanism, servo motor drives rotating ring, on the one hand, drive fan blade to rotate, form auxiliary air flow, enhance air flow, on the other hand, through swing component drive air jet cylinder up and down swing, make air flow evenly into air duct, prolong the residence time and contact area of air flow in photocatalyst area, by setting photocatalyst decomposition mechanism, UV lamp irradiates photocatalyst coating in air duct, improve the purification efficiency and thoroughness of formaldehyde.

Description

Technical Field

[0001] This invention relates to the field of air purification technology, and more particularly to a purification device for removing formaldehyde from paint. Background Technology

[0002] Paint is one of the main sources of formaldehyde pollution during interior decoration. Formaldehyde in paint continues to evaporate into indoor air after application, forming a long-term release source that poses a serious threat to human health. Therefore, efficient and rapid purification technologies for formaldehyde in paint have become a research hotspot in the field of indoor air purification.

[0003] Currently, most formaldehyde removal devices on the market employ a single adsorption method (such as activated carbon) or photocatalytic decomposition method. For example, existing technology includes a photocatalytic air purifier that draws in air via a fan, flows it over a carrier coated with a photocatalyst, and decomposes formaldehyde under ultraviolet light. However, such devices have the following drawbacks in practical applications: First, their purification function is limited, lacking effective pre-filtration and interception capabilities for the large amounts of dust and particulate matter present in the paint application environment. This leads to the core purification components (such as the photocatalytic carrier) being easily contaminated, resulting in a rapid decline in purification efficiency. Second, they lack automatic cleaning functions for the filter components, requiring frequent manual disassembly and cleaning by users, which is inconvenient and has a short maintenance cycle. Third, the airflow is unevenly distributed when entering the photocatalytic decomposition zone, resulting in low utilization efficiency of the photocatalytic material and a low overall formaldehyde removal rate. Therefore, there is an urgent need for a comprehensive purification device that can cope with the complex conditions of formaldehyde pollution from paint applications, possesses self-maintenance capabilities, and has high purification efficiency. Summary of the Invention

[0004] The purpose of this invention is to provide a purification device for removing formaldehyde from paint. By combining a self-cleaning mechanism, an airflow guiding mechanism, and a photocatalytic decomposition mechanism, it solves the problems of single purification function, easy contamination and clogging of filter components, and uneven airflow distribution in the prior art.

[0005] The technical solution of the present invention is as follows: a purification device for removing formaldehyde from paint, comprising a shell, an installation plate fixedly connected to the inner cavity of the shell, a filter assembly disposed on the top of the installation plate, a gas collecting cylinder fixedly connected to the top of the filter assembly, a partition disposed in the inner cavity of the shell, a funnel disposed on the top of the partition, and a fan disposed in the inner cavity of the funnel; a self-cleaning mechanism disposed at the bottom of the installation plate, the self-cleaning mechanism comprising a retaining ring rotatably connected to one side of the installation plate, a fixed cylinder fixedly connected to one side of the retaining ring, and a scraper fixedly connected to the surface of the fixed cylinder; an airflow guiding mechanism disposed at the top of the gas collecting cylinder, the airflow guiding mechanism comprising an air inlet cylinder communicating with the top of the gas collecting cylinder, a flexible tube communicating with the surface of the air inlet cylinder, and an air jet cylinder communicating with the other end of the flexible tube.

[0006] Preferably, the self-cleaning mechanism further includes a drive motor fixedly connected to the bottom of the mounting plate, a first bevel gear fixedly connected to the output shaft of the drive motor, a second bevel gear meshing with the surface of the first bevel gear, a rotating drum fixedly connected to the shaft of the second bevel gear, a feeding pipe fixedly connected to the surface of the rotating drum, a spiral conveying roller rotatably connected to the inner cavity of the rotating drum via a bearing seat, a first gear fixedly connected to the surface of the spiral conveying roller, and a first toothed ring meshing with the surface of the first gear. The drive motor provides revolution power to the rotating drum and the feeding pipe through the bevel gear set, and at the same time provides rotation power to the spiral conveying roller through the cooperation of the first toothed ring and the first gear, thereby realizing the automatic scraping and conveying of dust.

[0007] Preferably, one end of the fixed cylinder extends through to one side of the retaining ring and communicates with the top of the feed pipe. The top of the rotating cylinder is rotatably connected to the bottom of the mounting plate through a bearing seat. The scraper contacts the filter screen on the outer surface of the filter assembly. The scraper can closely adhere to the surface of the filter assembly to scrape circumferentially, and the scraped dust can fall smoothly into the feed pipe. The structure is compact and the transmission is efficient.

[0008] Preferably, a fixing ring is fixedly connected to the inner cavity of the outer shell, and a support wheel is fixedly connected to the top of the retaining ring. The retaining ring is disposed in the gap between the fixing ring and the mounting plate. The fixing ring and the support wheel provide stable rotational support for the retaining ring. At the same time, the retaining ring can effectively prevent unfiltered air from entering the equipment from the bottom of the mounting plate, ensuring the airflow sealing.

[0009] Preferably, the filter assembly includes mounting rings and filter screens disposed between two mounting rings. The number of filter screens is three, and from the outside to the inside, they are a metal interception screen, an electrostatic dust collection screen, and an activated carbon interception screen. The three layers of filter screens work together. The metal interception screen filters out large dust particles, the electrostatic dust collection screen adsorbs fine particulate matter, and the activated carbon interception screen initially adsorbs formaldehyde, thus achieving multi-stage air purification.

[0010] Preferably, the airflow guiding mechanism further includes a fan blade rotatably connected to the inner cavity of the air inlet cylinder, a second gear fixedly connected to one end of the fan blade, a second toothed ring meshing with the surface of the second gear, a rotating ring fixedly connected to the outer ring of the second toothed ring, a servo motor fixedly connected to one side of the partition, a third gear fixedly connected to the output shaft of the servo motor, a third toothed ring meshing with the surface of the third gear, and a swinging component disposed at the top of the air collecting cylinder. The outer ring of the third toothed ring is fixedly connected to the inner side of the rotating ring. The servo motor drives the rotating ring to rotate, which on the one hand drives the fan blade to rotate through gear meshing, generating auxiliary airflow, and on the other hand provides power to the swinging component to realize the swinging of the jet cylinder.

[0011] Preferably, the oscillating component includes a mounting bracket fixedly connected to the top of the air collecting cylinder, a rotating shaft rotatably connected to one side of the mounting bracket, a fourth gear fixedly connected to the surface of the rotating shaft, a toothed plate meshing with the surface of the fourth gear, a slider slidably connected to one side of the toothed plate, a first spring fixedly connected to the slider and one side of the toothed plate, a drive wheel fixedly connected to one side of the toothed plate, and a drive block fixedly connected to the inner side of the rotating ring. The slider is fixedly connected to the bottom of the partition through a connecting rod. The rotating ring drives the drive block to rotate, and the drive block periodically abuts against the drive wheel. With the reset action of the first spring, the toothed plate moves back and forth, thereby driving the jet cylinder to oscillate up and down through the fourth gear and the rotating shaft to achieve uniform air delivery.

[0012] Preferably, the photocatalytic decomposition mechanism further includes a return air channel connected to the air duct, the other end of which is connected to the surface of the funnel, and the UV lamp is U-shaped.

[0013] Preferably, the mounting plate has a mounting groove on its top, and a second spring is fixedly connected to the inner cavity of the mounting groove. The other end of the second spring is fixedly connected to a top plate. The elastic force of the second spring causes the top plate to press against the filter assembly, which facilitates the quick installation and disassembly of the filter assembly and reduces the difficulty of maintenance.

[0014] Preferably, a collection box is provided at the bottom of the inner cavity of the outer shell, an air inlet is provided on the surface of the outer shell, and a control panel is provided at the top of the surface of the outer shell. The collection box is used to collect the dust cleaned by the self-cleaning mechanism, the air inlet provides a channel for air to enter, and the control panel facilitates user operation of the device.

[0015] The beneficial effects of this invention are as follows: By setting a self-cleaning mechanism, the drive motor drives the scraper to rotate around the filter assembly, and in conjunction with the spiral conveying roller, the scraped dust is automatically transported to the collection box, realizing automatic cleaning of the filter screen surface, effectively avoiding filter screen clogging, ensuring the durability of filtration efficiency, and reducing manual maintenance costs. By setting an airflow guiding mechanism, the servo motor drives the rotating ring, which on the one hand drives the fan blade to rotate, forming an auxiliary airflow and enhancing airflow, and on the other hand drives the jet tube to swing up and down through the swinging component, so that the airflow enters the air guide tube evenly, extending the residence time and contact area of ​​the airflow in the photocatalytic area. By setting a photocatalytic decomposition mechanism, the UV lamp irradiates the photocatalytic coating in the air guide tube, efficiently decomposing formaldehyde, improving the purification efficiency and thoroughness of formaldehyde. It integrates automatic cleaning, uniform airflow, and efficient decomposition, realizing continuous, stable, and efficient purification of formaldehyde in coatings. Attached Figure Description

[0016] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below.

[0017] Figure 1A three-dimensional diagram of a purification device used to remove formaldehyde from paint;

[0018] Figure 2 A cross-sectional view of a purification device used to remove formaldehyde from paint;

[0019] Figure 3 An exploded view of the internal structure of the outer shell of a purification device used to remove formaldehyde from paint;

[0020] Figure 4 This is a schematic diagram of an airflow guiding mechanism in a purification device used to remove formaldehyde from paint.

[0021] Figure 5 This is a schematic diagram of a photocatalytic decomposition mechanism in a purification device for removing formaldehyde from paint.

[0022] Figure 6 This is a diagram showing the assembly of an air inlet cylinder, hose, and jet nozzle in a purification device used to remove formaldehyde from paint.

[0023] Figure 7 This is a schematic diagram of a oscillating component in a purification device used to remove formaldehyde from paint.

[0024] Figure 8 This is a schematic diagram of a self-cleaning mechanism in a purification device used to remove formaldehyde from paint.

[0025] Figure 9 This is a diagram showing the assembly of a mounting plate, retaining ring, and fixing ring in a purification device for removing formaldehyde from paint.

[0026] Figure 10 This is a schematic diagram of a filter component in a purification device used to remove formaldehyde from paint.

[0027] Figure 11 A cross-sectional view of a fixed cylinder in a purification device for removing formaldehyde from paint;

[0028] Figure 12 This is an exploded view of the mounting tank, second spring, and top plate in a purification device used to remove formaldehyde from paint.

[0029] Explanation of reference numerals in the attached drawings: 1. Outer shell; 2. Mounting plate; 3. Filter assembly; 31. Mounting ring; 32. Filter screen; 4. Air collection cylinder; 5. Baffle plate; 6. Funnel; 7. Self-cleaning mechanism; 71. Retaining ring; 72. Fixed cylinder; 73. Scraper; 74. Drive motor; 75. First bevel gear; 76. Second bevel gear; 77. Rotary drum; 78. Feed pipe; 79. Screw conveyor roller; 710. First gear; 711. First toothed ring; 8. Airflow guiding mechanism; 81. Air inlet cylinder; 82. Hose; 83. Jet nozzle; 84. Fan blade; 85. Second gear; 86. Second toothed ring; 87. Rotating ring; 88. Servo motor; 89. Swinging component; 891. Mounting bracket; 892. Rotating shaft; 893. Fourth gear; 894. Toothed plate; 895. Slider; 896. First spring; 897. Drive wheel; 898. Drive block; 810. Third gear; 811. Third toothed ring; 9. Photocatalytic decomposition mechanism; 91. Air duct; 92. UV lamp; 93. Return air channel; 10. Fan; 11. Fixed ring; 12. Support wheel; 13. Mounting slot; 14. Second spring; 15. Top plate; 16. Collection box; 17. Air inlet; 18. Control panel. Detailed Implementation

[0030] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. The described embodiments are only some embodiments of the present invention, and not all embodiments.

[0031] Example 1

[0032] Please see Figures 1-12 This is the first embodiment of the present invention, which provides a purification device for removing formaldehyde from paint, including a housing 1, a mounting plate 2 fixedly connected to the inner cavity of the housing 1, a filter assembly 3 disposed on the top of the mounting plate 2, a gas collecting cylinder 4 fixedly connected to the top of the filter assembly 3, a partition 5 disposed in the inner cavity of the housing 1, a funnel 6 disposed on the top of the partition 5, and a fan 10 disposed in the inner cavity of the funnel 6; a self-cleaning mechanism 7 is disposed at the bottom of the mounting plate 2, the self-cleaning mechanism 7 including a retaining ring 71 rotatably connected to one side of the mounting plate 2, and a retaining ring... A fixed cylinder 72 is fixedly connected to one side of the 71, and a scraper 73 is fixedly connected to the surface of the fixed cylinder 72; an airflow guiding mechanism 8 is provided at the top of the air collecting cylinder 4, the airflow guiding mechanism 8 includes an air inlet cylinder 81 connected to the top of the air collecting cylinder 4, a flexible hose 82 connected to the surface of the air inlet cylinder 81, and a jet nozzle 83 connected to the other end of the flexible hose 82; a photocatalytic decomposition mechanism 9 is provided at the top of the air collecting cylinder 4, the photocatalytic decomposition mechanism 9 includes a guide tube 91 fixedly connected to the top of the air collecting cylinder 4, and a UV lamp 92 disposed in the inner cavity of the guide tube 91.

[0033] The outer shell 1 forms the skeleton and external outline of the entire device. The mounting plate 2 divides the inner cavity of the outer shell 1 into upper and lower parts. On the top of the mounting plate 2, a filter assembly 3 is detachably installed. The core function of the filter assembly 3 is to initially intercept and treat particulate matter and some formaldehyde that enter with the air. The top of the filter assembly 3 is sealed and fixedly connected to an air collecting cylinder 4. The air collecting cylinder 4 is used to collect the clean airflow that has passed through the filter assembly 3. In the inner cavity of the outer shell 1, above the filter assembly 3, a partition 5 is also fixed. The central area of ​​the partition 5 is recessed downward to form a funnel 6, and a fan 10 is installed at the neck of the funnel 6.

[0034] When in operation, the fan 10 starts and creates a negative pressure in the area below it. Under the action of negative pressure, outside air is drawn into the interior of the housing 1 through the air inlet 17 on the surface of the housing 1. The airflow first flows through the filter assembly 3 on the mounting plate 2. After being initially purified by the filter assembly 3, it enters the air collection cylinder 4. Then, under the action of the airflow guiding mechanism 8, it enters the photocatalytic decomposition mechanism 9 evenly to decompose formaldehyde. Finally, the purified gas is discharged through the funnel 6 and the fan 10.

[0035] Example 2

[0036] Please see Figures 1-12 This is the second embodiment of the present invention, which is based on the previous embodiment.

[0037] Specifically, the self-cleaning mechanism 7 also includes a drive motor 74 fixedly connected to the bottom of the mounting plate 2, a first bevel gear 75 fixedly connected to the output shaft of the drive motor 74, a second bevel gear 76 meshing with the surface of the first bevel gear 75, a rotating drum 77 fixedly connected to the axis of the second bevel gear 76, a feed pipe 78 fixedly connected to the surface of the rotating drum 77, a spiral conveying roller 79 rotatably connected to the inner cavity of the rotating drum 77 via a bearing seat, a first gear 710 fixedly connected to the surface of the spiral conveying roller 79, a first toothed ring 711 meshing with the surface of the first gear 710, one end of the fixed cylinder 72 extending through to one side of the retaining ring 71 and communicating with the top of the feed pipe 78, the top of the rotating drum 77 rotatably connected to the bottom of the mounting plate 2 via a bearing seat, and the scraper 73 contacting the filter screen 32 on the outer surface of the filter assembly 3.

[0038] The support wheel 12 allows the retaining ring 71 to be stably clamped in the gap between the fixed ring 11 and the mounting plate 2 and rotate freely. The scraper 73 is tightly attached to the outermost layer (i.e., the metal mesh) surface of the filter assembly 3. The output shaft of the drive motor 74 drives the first bevel gear 75 to rotate, which in turn drives the vertical rotating drum 77 to rotate through the meshing second bevel gear 76. The bottom end of the rotating drum 77 is connected to the feed pipe 78. When the rotating drum 77 rotates, the feed pipe 78 fixed thereto and the fixed cylinder 72 connected through the retaining ring 71 rotate together, thereby driving the scraper 73 to make a circular motion along the outer surface of the filter assembly 3, scraping off the dust attached to the metal mesh. The dust falls into the fixed cylinder 72.

[0039] Meanwhile, as the drum 77 rotates, the first gear 710 rolls on the first toothed ring 711 fixed to the bottom of the mounting plate 2, thereby generating rotation. The rotating spiral conveying roller 79 forces the dust that falls into the fixed cylinder 72 and the discharge pipe 78 downwards, and finally discharges it into the collection box 16 at the bottom of the outer casing 1, completing the automatic cleaning and collection process of dust. The setting of the retaining ring 71 ensures that when the self-cleaning mechanism 7 is working, the purified airflow through the filter assembly 3 will not leak from the bottom of the mounting plate 2.

[0040] Example 3

[0041] Please see Figures 1-12 This is the third embodiment of the present invention, which is based on the first two embodiments.

[0042] Specifically, the airflow guiding mechanism 8 also includes a fan blade 84 rotatably connected to the inner cavity of the air inlet cylinder 81, a second gear 85 fixedly connected to one end of the fan blade 84, a second toothed ring 86 meshing with the surface of the second gear 85, a rotating ring 87 fixedly connected to the outer ring of the second toothed ring 86, a servo motor 88 fixedly connected to one side of the partition plate 5, a third gear 810 fixedly connected to the output shaft of the servo motor 88, a third toothed ring 811 meshing with the surface of the third gear 810, and a swinging component 89 set at the top of the air collecting cylinder 4. The outer ring of the third toothed ring 811 is fixedly connected to the inner side of the rotating ring 87.

[0043] The swing component 89 includes a mounting bracket 891 fixedly connected to the top of the air collecting cylinder 4, a rotating shaft 892 rotatably connected to one side of the mounting bracket 891, a fourth gear 893 fixedly connected to the surface of the rotating shaft 892, a toothed plate 894 meshing with the surface of the fourth gear 893, a slider 895 slidably connected to one side of the toothed plate 894, a first spring 896 fixedly connected to one side of the slider 895 and the toothed plate 894, a drive wheel 897 fixedly connected to one side of the toothed plate 894, and a drive block 898 fixedly connected to the inner side of the rotating ring 87. The slider 895 is fixedly connected to the bottom of the partition plate 5 through a connecting rod. The photocatalytic decomposition mechanism 9 also includes a return air channel 93 communicating with the air guide 91. The other end of the return air channel 93 is communicating with the surface of the funnel 6. The UV lamp 92 is U-shaped.

[0044] The airflow from the air collecting cylinder 4 first enters the air intake cylinder 81. The side wall of the air intake cylinder 81 is connected to a jet nozzle 83 via a hose 82. To assist the airflow and control the airflow direction, a fan blade 84 is rotatably connected to the inner cavity of the air intake cylinder 81. A second gear 85 is fixed to the shaft end of the fan blade 84. A servo motor 88 is fixed on the partition plate 5. The third gear 810 on its output shaft drives a rotating ring 87 with a third toothed ring 811 to rotate. A second toothed ring 86 is fixed to the inner side of the rotating ring 87. The second toothed ring 86 meshes with the second gear 85. Therefore, when the servo motor 88 is working, it can drive the swinging component 89 to work through the rotating ring 87 and drive the fan blade 84 to rotate through gear transmission, providing auxiliary power for the airflow and making the airflow more smoothly ejected from the jet nozzle 83 through the hose 82.

[0045] The swinging component 89 optimizes the photocatalytic decomposition effect and ensures uniform airflow distribution. When the rotating ring 87 rotates, the drive block 898 periodically collides with and pushes the drive wheel 897, forcing the toothed plate 894 to move backward against the elastic force of the first spring 896. This, in turn, drives the fourth gear 893 and the rotating shaft 892 to rotate through meshing, causing the jet tube 83 to swing upward at an angle. After the drive block 898 slides past the drive wheel 897, the toothed plate 894 resets under the action of the first spring 896, thereby driving the jet tube 83 to swing downward. This cycle repeats, and the jet tube 83 achieves up-and-down swinging.

[0046] The interior of the air duct 91 is coated with a photocatalytic material (such as nano-titanium dioxide). The nozzle of the jet nozzle 83 faces the interior space of the air duct 91. A U-shaped UV lamp 92 is installed inside the air duct 91. When airflow is evenly and oscillatingly injected into the air duct 91 from the jet nozzle 83, the airflow can fully contact the ultraviolet light emitted by the UV lamp 92 and the photocatalyst coated on the inner wall of the air duct 91. Under ultraviolet light irradiation, the photocatalyst generates highly oxidizing electron-hole pairs, efficiently decomposing residual formaldehyde molecules in the airflow into harmless carbon dioxide and water. The clean air, deeply purified by the photocatalyst, is guided back to the funnel 6 through the return air channel 93 connected to the top of the air duct 91, and finally discharged from the outlet by the fan 10, completing the entire purification cycle and improving purification efficiency.

[0047] Example 4

[0048] Please see Figures 1-12 This is the fourth embodiment of the present invention, which is based on the first three embodiments.

[0049] Specifically: a fixing ring 11 is fixedly connected to the inner cavity of the outer shell 1, a support wheel 12 is fixedly connected to the top of the retaining ring 71, the retaining ring 71 is disposed in the gap between the fixing ring 11 and the mounting plate 2, the filter assembly 3 includes a mounting ring 31 and a filter screen 32 disposed between two mounting rings 31, the number of filter screens 32 is three, and from the outside to the inside are a metal interception mesh, an electrostatic dust collection mesh and an activated carbon interception mesh, the top of the mounting plate 2 is provided with a mounting groove 13, a second spring 14 is fixedly connected to the inner cavity of the mounting groove 13, the other end of the second spring 14 is fixedly connected to a top plate 15, a collection box 16 is provided at the bottom of the inner cavity of the outer shell 1, an air inlet 17 is provided on the surface of the outer shell 1, and a control panel 18 is provided at the top of the surface of the outer shell 1.

[0050] The filter assembly 3 includes two coaxial mounting rings 31 and a three-layer filter screen 32 fixedly connected between the two mounting rings 31. The three layers of filter screen 32 are, from the outside to the inside, a metal interception mesh, an electrostatic dust collection mesh, and an activated carbon interception mesh. The metal interception mesh is used to intercept larger dust, fiber, and paint mist particles in the air. The electrostatic dust collection mesh uses the principle of electrostatic adsorption to capture fine dust and some aerosol pollutants. The innermost activated carbon interception mesh performs preliminary physical adsorption of gaseous pollutants such as formaldehyde in the air. When the filter assembly 3 is placed in, the top plate 15, under the elastic force of the second spring 14, pushes upward to tighten the mounting ring 31 at the bottom of the filter assembly 3, thereby achieving a stable elastic snap-fit.

[0051] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit it. Although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, and all such modifications or substitutions should be covered within the scope of the claims of the present invention.

Claims

1. A purification device for removing formaldehyde from paint, comprising a housing (1), a mounting plate (2) fixedly connected to the inner cavity of the housing (1), and a filter assembly (3) disposed on the top of the mounting plate (2), characterized in that: The filter assembly (3) is fixedly connected to the top of the air collecting cylinder (4), the inner cavity of the outer shell (1) is provided with a partition (5), the top of the partition (5) is provided with a funnel (6), and the inner cavity of the funnel (6) is provided with a fan (10). The bottom of the mounting plate (2) is provided with a self-cleaning mechanism (7). The self-cleaning mechanism (7) includes a retaining ring (71) rotatably connected to one side of the mounting plate (2), a fixed cylinder (72) fixedly connected to one side of the retaining ring (71), and a scraper (73) fixedly connected to the surface of the fixed cylinder (72). The top of the air collecting cylinder (4) is provided with an airflow guiding mechanism (8), which includes an air inlet cylinder (81) connected to the top of the air collecting cylinder (4), a hose (82) connected to the surface of the air inlet cylinder (81), and a jet cylinder (83) connected to the other end of the hose (82). The top of the gas collecting cylinder (4) is provided with a photocatalytic decomposition mechanism (9), which includes a guide tube (91) fixedly connected to the top of the gas collecting cylinder (4) and a UV lamp (92) disposed in the inner cavity of the guide tube (91).

2. The purification equipment for removing formaldehyde from paint according to claim 1, characterized in that: The self-cleaning mechanism (7) further includes a drive motor (74) fixedly connected to the bottom of the mounting plate (2), a first bevel gear (75) fixedly connected to the output shaft of the drive motor (74), a second bevel gear (76) meshing with the surface of the first bevel gear (75), a rotating drum (77) fixedly connected to the shaft of the second bevel gear (76), a feed pipe (78) fixedly connected to the surface of the rotating drum (77), a spiral conveying roller (79) rotatably connected to the inner cavity of the rotating drum (77) through a bearing seat, a first gear (710) fixedly connected to the surface of the spiral conveying roller (79), and a first toothed ring (711) meshing with the surface of the first gear (710).

3. The purification equipment for removing formaldehyde from paint according to claim 2, characterized in that: One end of the fixed cylinder (72) extends through to one side of the retaining ring (71) and is connected to the top of the feed pipe (78). The top of the rotating cylinder (77) is rotatably connected to the bottom of the mounting plate (2) through the bearing seat. The scraper (73) contacts the filter screen (32) on the outer surface of the filter assembly (3).

4. The purification equipment for removing formaldehyde from paint according to claim 1, characterized in that: The inner cavity of the outer shell (1) is fixedly connected to a fixing ring (11), and the top of the retaining ring (71) is fixedly connected to a support wheel (12). The retaining ring (71) is set in the gap between the fixing ring (11) and the mounting plate (2).

5. The purification equipment for removing formaldehyde from paint according to claim 1, characterized in that: The filter assembly (3) includes mounting rings (31) and filter screens (32) disposed between two mounting rings (31). There are three filter screens (32), which are arranged from the outside to the inside as a metal interception screen, an electrostatic dust collection screen and an activated carbon interception screen.

6. The purification equipment for removing formaldehyde from paint according to claim 1, characterized in that: The airflow guiding mechanism (8) further includes a fan blade (84) rotatably connected to the inner cavity of the air inlet cylinder (81), a second gear (85) fixedly connected to one end of the fan blade (84), a second toothed ring (86) meshing with the surface of the second gear (85), a rotating ring (87) fixedly connected to the outer ring of the second toothed ring (86), a servo motor (88) fixedly connected to one side of the partition plate (5), a third gear (810) fixedly connected to the output shaft of the servo motor (88), a third toothed ring (811) meshing with the surface of the third gear (810), and a swinging component (89) set on the top of the air collecting cylinder (4). The outer ring of the third toothed ring (811) is fixedly connected to the inner side of the rotating ring (87).

7. The purification equipment for removing formaldehyde from paint according to claim 6, characterized in that: The swing component (89) includes a mounting bracket (891) fixedly connected to the top of the air collecting cylinder (4), a rotating shaft (892) rotatably connected to one side of the mounting bracket (891), a fourth gear (893) fixedly connected to the surface of the rotating shaft (892), a toothed plate (894) meshing with the surface of the fourth gear (893), a slider (895) slidably connected to one side of the toothed plate (894), a first spring (896) fixedly connected to one side of the slider (895) and the toothed plate (894), a drive wheel (897) fixedly connected to one side of the toothed plate (894), and a drive block (898) fixedly connected to the inner side of the rotating ring (87). The slider (895) is fixedly connected to the bottom of the partition plate (5) through a connecting rod.

8. The purification equipment for removing formaldehyde from paint according to claim 1, characterized in that: The photocatalytic decomposition mechanism (9) also includes a return air channel (93) connected to the air duct (91), the other end of which is connected to the surface of the funnel (6), and the UV lamp (92) is U-shaped.

9. The purification equipment for removing formaldehyde from paint according to claim 1, characterized in that: The mounting plate (2) has a mounting groove (13) on its top. A second spring (14) is fixedly connected to the inner cavity of the mounting groove (13). The other end of the second spring (14) is fixedly connected to a top plate (15).

10. The purification equipment for removing formaldehyde from paint according to claim 1, characterized in that: The bottom of the inner cavity of the outer shell (1) is provided with a collection box (16), the surface of the outer shell (1) is provided with an air inlet (17), and the top of the surface of the outer shell (1) is provided with a control panel (18).

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