An air filter for indoor formaldehyde dust removal
By combining modified activated carbon filter elements and air guiding mechanisms, the problems of insufficient formaldehyde adsorption capacity and dust clogging in air filters are solved, achieving efficient and automated air purification and reducing maintenance costs.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- HEBEI HUITOUIMA BIOTECHNOLOGY CO LTD
- Filing Date
- 2025-08-31
- Publication Date
- 2026-07-24
AI Technical Summary
Existing air filters have limited adsorption capacity for formaldehyde, ordinary activated carbon filters are easily saturated, and uneven dust filtration leads to localized clogging of the filter screen, requiring frequent manual cleaning, and there is a lack of automated solutions.
It adopts a modified activated carbon filter element combined with an air guide mechanism. Through the coordinated work of the suction impeller and the air guide plate, it ensures uniform airflow distribution and is equipped with an automatic cleaning system, including a cylinder-driven brush plate and a sealed flip design to achieve automatic cleaning of the filter screen.
It improves the catalytic treatment effect of formaldehyde, reduces filter clogging, lowers maintenance costs, and achieves a highly efficient and automated air purification process.
Smart Images
Figure CN224551722U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of air filter technology, specifically to an air filter for removing formaldehyde dust indoors. Background Technology
[0002] Air filters are key devices for improving indoor air quality and are widely used in enclosed environments such as homes and offices. Indoor air pollution mainly originates from formaldehyde (commonly found in building materials) and dust (such as PM2.5 and pollen). Currently, air filters typically use multiple layers of filters (such as pre-filters and activated carbon filters) to remove pollutants.
[0003] For example, Chinese Patent (Publication No.: CN213699209U) discloses "an indoor formaldehyde dust removal air filter, including a box body, and further including: an air inlet pipe connected to the top of the left side of the box body, an air outlet pipe connected to the top of the right side of the box body, a partition welded inside the box body, a filter screen installed between the top of the partition and the top of the box body; a fixed box installed on the top of the box body, a support plate installed on the back of the fixed box, a motor bolted to the top of the support plate, the output shaft of the motor passing through the fixed box and a first wheel disk installed thereon, a fixed column bolted to the front of the first wheel disk, a second wheel disk bolted to the front of the fixed column, the front of the second wheel disk rotatably connected to the inside of the fixed box, a first connecting rod hinged to the surface of the fixed column, a lifting plate hinged to the bottom of the first connecting rod, and a cleaning wipe glued to the right side of the lifting plate"; However, in the process of implementing related technologies, existing technologies still have certain technical shortcomings: First, existing activated carbon filter cartridges have limited adsorption capacity for formaldehyde and are easily saturated, resulting in a short-lasting purification effect. Formaldehyde is a volatile organic compound that requires efficient catalytic or modification treatment to decompose effectively, but existing filters often lack optimized design. Secondly, dust filtration relies on pre-filters, but uneven airflow often leads to localized filter blockage, reducing overall ventilation efficiency. Existing suction mechanisms (such as fixed fans) cannot dynamically adjust airflow, resulting in energy waste and dead zones in the purification process. Third, the filter screen is easily clogged by dust, requiring frequent shutdowns for disassembly and cleaning, which affects the continuous operation of the equipment. Existing cleaning mechanisms mostly rely on manual operation and lack automated solutions, increasing the burden on users and equipment downtime. Utility Model Content
[0004] This invention proposes an air filter for removing formaldehyde dust indoors, which solves the problem of poor formaldehyde removal efficiency in related technologies.
[0005] The technical solution of this utility model is as follows: An air filter for removing formaldehyde dust indoors includes a housing, an air inlet pipe fixedly connected to one end of the housing, an air outlet pipe fixedly connected to the other end of the housing, a filter screen fixedly connected to the end of the housing near the air inlet pipe, a modified activated carbon filter element fixedly connected to the end of the housing near the air outlet pipe, a protective box fixedly connected to the top of the housing, a motor fixedly installed inside the protective box, a suction mechanism provided on one side of the filter screen to draw external air into the housing in conjunction with the start of the motor, and a guide mechanism provided on one side of the modified activated carbon filter element to evenly blow air toward the modified activated carbon filter element in conjunction with the start of the motor.
[0006] Preferably, the suction mechanism includes a partition fixedly connected to the inner side of the housing, a mounting bracket fixedly connected to one side of the partition, a suction impeller rotatably connected to the inner side of the mounting bracket, a mounting sleeve fixedly connected to the outer side of the mounting bracket, and a transmission component for driving the suction impeller to rotate on the inner side of the mounting sleeve.
[0007] Preferably, the transmission component includes a drive shaft that rotatably passes through the side wall of the mounting sleeve. The drive shaft is rotatably connected to the mounting sleeve. The top of the drive shaft is fixedly connected to the output shaft of the motor. A first bevel gear is fixedly connected to the bottom of the drive shaft. A second bevel gear, coaxially fixed with the suction impeller, is rotatably connected to the inner side of the mounting sleeve. The second bevel gear meshes with the first bevel gear.
[0008] Preferably, the air guiding mechanism includes a fixed frame fixedly connected to the inner side of the housing, a plurality of air guiding plates rotatably connected to the inner side of the fixed frame, the plurality of air guiding plates being equidistantly distributed along the vertical direction, a guide rod fixedly connected to the inner side of the housing along the vertical direction, a movable block slidably connected to the guide rod, a vertically arranged toothed plate fixedly connected to one end of the movable block, a fan-shaped toothed block fixedly connected to the end of each of the plurality of air guiding plates, the plurality of fan-shaped toothed blocks meshing with the toothed plate, and a linkage component provided at the other end of the movable block, which drives the movable block to slide up and down reciprocally by cooperating with the rotation of the drive shaft.
[0009] Preferably, the linkage includes an eccentric wheel rotatably connected to the outside of the mounting sleeve, a connecting rod rotatably connected to the outside of the eccentric wheel, the end of the connecting rod away from the eccentric wheel being hinged to the movable block, and a third bevel gear rotatably connected to the inside of the mounting sleeve and fixed coaxially with the eccentric wheel, the third bevel gear meshing with the first bevel gear.
[0010] Preferably, the third bevel gear has the same number of teeth as the first bevel gear, and the ratio of the number of teeth of the second bevel gear to the first bevel gear is 1:8.
[0011] Preferably, the bottom of the inner side of the housing is provided with an installation cavity, and the end of the installation cavity near the filter screen is provided with a dust discharge port. A sealing element is provided on the inner side of the dust discharge port, and a cleaning element for cleaning the outer wall of the filter screen is provided on the outer side of the filter screen.
[0012] Preferably, the sealing element includes a sealing plate rotatably connected to the inner side of the dust discharge port, a stop block rotatably connected to the outer side of the housing and fixed coaxially with the sealing plate, a torsion spring sleeved on the rotating shaft of the sealing plate, one end of the torsion spring being welded to the stop block, and the other end of the torsion spring being welded to the outer wall of the housing.
[0013] Preferably, the cleaning component includes a cylinder fixedly connected to the inside of the protective box, a pressure block fixedly connected to the output end of the cylinder, a brush plate fixedly connected to one end of the pressure block to abut against the outer wall of the filter screen, and the pressure block abuts against the sealing plate by moving downward.
[0014] Preferably, a dust collection box is slidably fitted inside the mounting cavity, and a handle is fixedly connected to one end of the dust collection box.
[0015] The working principle and beneficial effects of this utility model are as follows: 1. Modified activated carbon filter element is used to replace ordinary activated carbon. Combined with air guide mechanism to ensure uniform airflow distribution. The reciprocating oscillation of air guide plate forces air to fully contact the filter element surface, maximizing the catalytic reaction area and solving the problem of local saturation caused by uneven airflow in traditional filter elements.
[0016] 2. The suction mechanism and the air guide mechanism work together to force airflow through a high-speed suction impeller and adjust the airflow direction with a dynamic air guide plate, eliminating the local dust accumulation on the filter screen caused by traditional fixed fans.
[0017] 3. The integrated cleaning and sealing components automatically clean the filter screen by driving the brush plate with a cylinder, and use the flip design of the sealing plate to guide the dust into the dust collection box without disassembling the filter screen, reducing manual intervention. The dust collection box can be cleaned regularly to avoid secondary pollution and greatly reduce maintenance costs. Attached Figure Description
[0018] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.
[0019] Figure 1 This invention provides a structural schematic diagram of an air filter for removing formaldehyde dust from indoor air. Figure 1 ; Figure 2 This invention provides a structural schematic diagram of an air filter for removing formaldehyde dust from indoor air. Figure 2 ; Figure 3 This is a schematic diagram of the suction mechanism proposed in this utility model; Figure 4 for Figure 3 An enlarged structural diagram of part A; Figure 5 This is a schematic diagram of the air guide mechanism proposed in this utility model; Figure 6 This is a schematic diagram of the linkage component proposed in this utility model; Figure 7 This is a schematic diagram of the structure of the sealing element proposed in this utility model; Figure 8 This is a schematic diagram of the cleaning component proposed in this utility model.
[0020] In the diagram: 1. Housing; 2. Inlet pipe; 3. Outlet pipe; 4. Filter screen; 5. Seal; 51. Sealing plate; 52. Stop block; 53. Torsion spring; 6. Dust collection box; 61. Handle; 7. Cleaning components; 71. Cylinder; 72. Pressure block; 73. Brush plate; 8. Protective box; 9. Motor; 10. Suction mechanism; 101. Partition plate; 102. Mounting bracket; 103. Suction impeller; 104. Mounting sleeve; 05. Drive shaft; 106. First bevel gear; 107. Second bevel gear; 11. Air guide mechanism; 111. Fixed frame; 112. Air guide plate; 113. Guide rod; 114. Movable block; 115. Gear plate; 116. Sector-shaped gear block; 117. Linkage component; 1171. Eccentric wheel; 1172. Connecting rod; 1173. Third bevel gear; 12. Modified activated carbon filter element; 13. Dust outlet; 14. Mounting cavity. Detailed Implementation
[0021] The technical solutions of this utility model will be clearly and completely described below with reference to the embodiments of this utility model. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this utility model.
[0022] This application discloses an air filter for removing formaldehyde dust indoors. Please refer to [link / reference]. Figure 1 and Figure 2An air filter for removing formaldehyde dust indoors includes a housing 1. One end of the housing 1 is fixedly connected to an air inlet pipe 2, and the other end of the housing 1 is fixedly connected to an air outlet pipe 3. A filter screen 4 is fixedly connected to the inner side of the housing 1 near the air inlet pipe 2, and a modified activated carbon filter element 12 is fixedly connected to the inner side of the housing 1 near the air outlet pipe 3. A protective box 8 is fixedly connected to the top of the housing 1, and a motor 9 is fixedly installed inside the protective box 8. A suction mechanism 10 is provided on one side of the filter screen 4 to draw outside air into the housing 1 when the motor 9 is activated. An air guide mechanism 11 is provided on one side of the modified activated carbon filter element 12 to evenly blow air toward the modified activated carbon filter element 12 when the motor 9 is activated.
[0023] By starting the motor 9, the suction mechanism 10 forces the air outside the housing 1 to be drawn into the housing 1 through the air inlet pipe 2. Then, the filter screen 4 filters the dust in the air. The filtered air continues to be blown evenly to the modified activated carbon filter element 12 under the guidance of the air guide mechanism 11. The modified activated carbon filter element 12 can catalyze the formaldehyde in the air, thus purifying the air and improving indoor air quality.
[0024] Please see Figures 1-3 The suction mechanism 10 includes a partition 101 fixedly connected to the inner side of the housing 1. A mounting bracket 102 is fixedly connected to one side of the partition 101. A suction impeller 103 is rotatably connected to the inner side of the mounting bracket 102. A mounting sleeve 104 is fixedly connected to the outer side of the mounting bracket 102. A transmission component for driving the suction impeller 103 to rotate is provided on the inner side of the mounting sleeve 104. The transmission component includes a drive shaft 105 that rotatably passes through the side wall of the mounting sleeve 104. The drive shaft 105 is rotatably connected to the mounting sleeve 104. The top of the drive shaft 105 is fixedly connected to the output shaft of the motor 9. A first bevel gear 106 is fixedly connected to the bottom of the drive shaft 105. A second bevel gear 107, coaxially fixed with the suction impeller 103, is rotatably connected to the inner side of the mounting sleeve 104. The second bevel gear 107 meshes with the first bevel gear 106. The gear ratio of the second bevel gear 107 to the first bevel gear 106 is 1:8.
[0025] By starting the motor 9, the drive shaft 105 is driven to rotate, causing the first bevel gear 106 to rotate, which in turn causes the second bevel gear 107 to rotate at high speed. This high-speed rotation of the second bevel gear 107 creates a negative pressure state in the air intake pipe 2 of the housing 1, forcibly drawing air from outside the housing 1 into the housing 1. Subsequently, the filter screen 4 filters the dust in the air, and the filtered air continues to be evenly blown towards the modified activated carbon filter element 12 under the guidance of the air guide mechanism 11. The modified activated carbon filter element 12 can catalyze the formaldehyde in the air, thus purifying the air. The design of the suction impeller 103 can greatly improve the air flow speed and improve the purification efficiency of indoor air.
[0026] Please see Figure 1 and 6 The air guiding mechanism 11 includes a fixed frame 111 fixedly connected to the inner side of the housing 1. A plurality of air guiding plates 112 are rotatably connected to the inner side of the fixed frame 111. The air guiding plates 112 are equidistantly distributed along the vertical direction. A guide rod 113 is fixedly connected to the inner side of the housing 1 along the vertical direction. A movable block 114 is slidably connected to the guide rod 113. A vertically arranged toothed plate 115 is fixedly connected to one end of the movable block 114. Fan-shaped toothed blocks 116 are fixedly connected to the ends of the air guiding plates 112, and the fan-shaped toothed blocks 116 mesh with the toothed plates 115. The other end of the movable block 114 is provided with a passage... A linkage 117 is used to drive the movable block 114 to slide up and down in conjunction with the rotation of the drive shaft 105. The linkage 117 includes an eccentric wheel 1171 rotatably connected to the outside of the mounting sleeve 104. A connecting rod 1172 is rotatably connected to the outside of the eccentric wheel 1171. One end of the connecting rod 1172 away from the eccentric wheel 1171 is hinged to the movable block 114. A third bevel gear 1173 is rotatably connected to the inside of the mounting sleeve 104 and is fixed coaxially with the eccentric wheel 1171. The third bevel gear 1173 meshes with the first bevel gear 106. The third bevel gear 1173 and the first bevel gear 106 have the same number of teeth.
[0027] By starting the motor 9, the drive shaft 105 is driven to rotate, causing the first bevel gear 106 to rotate, which in turn causes the third bevel gear 1173 to rotate synchronously. This causes the eccentric wheel 1171 to rotate, which in turn causes the connecting rod 1172 to drive the movable block 114 to slide up and down along the guide rod 113. This causes the toothed plate 115 to move up and down, which in turn causes all the fan-shaped toothed blocks 116 to drive the corresponding air guide plates 112 to swing up and down. This allows the air guide plates 112 to blow air evenly onto the modified activated carbon filter element 12, so that the air can pass through the modified activated carbon filter element 12 evenly. This greatly enhances the catalytic effect of formaldehyde in the air, thereby improving the air purification effect.
[0028] Please see Figure 1 and 7 An installation cavity 14 is provided at the bottom of the inner side of the housing 1. A dust discharge port 13 is provided at one end of the installation cavity 14 near the filter screen 4. A dust collection box 6 is slidably fitted inside the installation cavity 14. A handle 61 is fixedly connected to one end of the dust collection box 6. A sealing element 5 is provided inside the dust discharge port 13. A cleaning element 7 for cleaning the outer wall of the filter screen 4 is provided outside the filter screen 4. The sealing element 5 includes a sealing plate 51 rotatably connected to the inner side of the dust discharge port 13. A stop block 52 is rotatably connected to the outer side of the housing 1 and is coaxially fixed with the sealing plate 51. A torsion spring 53 is sleeved on the rotating shaft of the sealing plate 51. One end of the torsion spring 53 is welded to the stop block 52, and the other end of the torsion spring 53 is welded to the outer wall of the housing 1.
[0029] During the air purification process, the sealing plate 51 can seal the dust discharge port 13; when the filter screen 4 needs to be cleaned, the dust discharge port 13 is opened by flipping the sealing plate 51, so that the dust and impurities on the filter screen 4 can be cleaned and guided into the dust collection box 6 inside the dust discharge port 13, thereby realizing the collection of dust and facilitating subsequent centralized treatment.
[0030] Please see Figure 1 and 8 The cleaning component 7 includes a cylinder 71 fixedly connected to the inside of the protective box 8. A pressure block 72 is fixedly connected to the output end of the cylinder 71. A brush plate 73 that abuts against the outer wall of the filter screen 4 is fixedly connected to one end of the pressure block 72. The pressure block 72 abuts against the sealing plate 51 by moving downward.
[0031] Working principle: First, the motor 9 drives the drive shaft 105 to rotate, causing the first bevel gear 106 to rotate, which in turn causes the second bevel gear 107 to rotate at high speed. This high-speed rotation of the second bevel gear 107 creates a negative pressure in the air intake pipe 2 of the housing 1, forcibly drawing air from outside the housing 1 into the housing 1. Subsequently, the filter screen 4 filters the dust in the air. The design of the suction impeller 103 can greatly improve the airflow speed and improve the purification efficiency of indoor air. At the same time, the first bevel gear 106 drives the third bevel gear 1173 to rotate synchronously, which causes the eccentric wheel 1171 to rotate. This causes the connecting rod 1172 to drive the movable block 114 to slide up and down along the guide rod 113, which in turn causes the toothed plate 115 to move up and down. This causes all the fan-shaped toothed blocks 116 to drive the corresponding air guide plates 112 to swing up and down, so that the air guide plates 112 blow air evenly to the modified activated carbon filter element 12. This allows the filtered air to pass evenly through the modified activated carbon filter element 12, which can greatly improve the catalytic effect of formaldehyde in the air and thus improve the air purification effect. When the filter screen 4 needs cleaning, the control cylinder 71 drives the pressure block 72 to move downward, causing the brush plate 73 to move downward along the outer wall of the filter screen 4. This allows the brush plate 73 to sweep away the dust and impurities attached to the outer wall of the filter screen 4. When the pressure block 72 contacts the sealing plate 51, the sealing plate 51 is flipped under the downward action of the pressure block 72, allowing the brush plate 73 to move into the dust collection box 6. This allows the brush plate 73 to carry the swept dust and impurities into the dust collection box 6 for storage. This eliminates the need for frequent shutdowns to disassemble and clean the filter screen 4, greatly improving air purification efficiency.
[0032] The above are merely preferred embodiments of the present utility model and are not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model shall be included within the protection scope of the present utility model.
Claims
1. An air filter for removing formaldehyde dust indoors, comprising a housing (1), an air inlet pipe (2) fixedly connected to one end of the housing (1), and an air outlet pipe (3) fixedly connected to the other end of the housing (1), characterized in that, A filter screen (4) is fixedly connected to one end of the inner side of the housing (1) near the air inlet pipe (2), and a modified activated carbon filter element (12) is fixedly connected to one end of the inner side of the housing (1) near the air outlet pipe (3). A protective box (8) is fixedly connected to the top of the housing (1), and a motor (9) is fixedly installed inside the protective box (8). A suction mechanism (10) is provided on one side of the filter screen (4) to draw external air into the housing (1) in conjunction with the start of the motor (9). A guide mechanism (11) is provided on one side of the modified activated carbon filter element (12) to evenly blow air toward the modified activated carbon filter element (12) in conjunction with the start of the motor (9).
2. An air filter for removing formaldehyde dust indoors according to claim 1, characterized in that, The suction mechanism (10) includes a partition (101) fixedly connected to the inside of the housing (1). A mounting bracket (102) is fixedly connected to one side of the partition (101). A suction impeller (103) is rotatably connected to the inside of the mounting bracket (102). A mounting sleeve (104) is fixedly connected to the outside of the mounting bracket (102). A transmission component for driving the suction impeller (103) to rotate is provided on the inside of the mounting sleeve (104).
3. An air filter for removing formaldehyde dust indoors according to claim 2, characterized in that, The transmission component includes a drive shaft (105) that rotates through the side wall of the mounting sleeve (104). The drive shaft (105) is rotatably connected to the mounting sleeve (104). The top of the drive shaft (105) is fixedly connected to the output shaft of the motor (9). A first bevel gear (106) is fixedly connected to the bottom of the drive shaft (105). A second bevel gear (107) is rotatably connected to the inner side of the mounting sleeve (104) and is fixedly coaxially with the suction impeller (103). The second bevel gear (107) meshes with the first bevel gear (106).
4. An air filter for removing formaldehyde dust indoors according to claim 3, characterized in that, The air guiding mechanism (11) includes a fixed frame (111) fixedly connected to the inner side of the housing (1). A plurality of air guiding plates (112) are rotatably connected to the inner side of the fixed frame (111). The plurality of air guiding plates (112) are equidistantly distributed along the vertical direction. A guide rod (113) is fixedly connected to the inner side of the housing (1) along the vertical direction. A movable block (114) is slidably connected to the guide rod (113). A vertically arranged toothed plate (115) is fixedly connected to one end of the movable block (114). A fan-shaped toothed block (116) is fixedly connected to the end of each of the plurality of air guiding plates (112). The plurality of fan-shaped toothed blocks (116) mesh with the toothed plate (115). A linkage (117) is provided at the other end of the movable block (114) to drive the movable block (114) to slide up and down by cooperating with the rotation of the drive shaft (105).
5. An air filter for removing formaldehyde dust indoors according to claim 4, characterized in that, The linkage (117) includes an eccentric wheel (1171) rotatably connected to the outside of the mounting sleeve (104). A connecting rod (1172) is rotatably connected to the outside of the eccentric wheel (1171). The end of the connecting rod (1172) away from the eccentric wheel (1171) is hinged to the movable block (114). A third bevel gear (1173) is rotatably connected to the inside of the mounting sleeve (104) and is fixed coaxially with the eccentric wheel (1171). The third bevel gear (1173) meshes with the first bevel gear (106).
6. An air filter for removing formaldehyde dust indoors according to claim 5, characterized in that, The third bevel gear (1173) has the same number of teeth as the first bevel gear (106), and the ratio of the number of teeth of the second bevel gear (107) to the first bevel gear (106) is 1:
8.
7. An air filter for removing formaldehyde dust indoors according to claim 1, characterized in that, The bottom of the inner side of the housing (1) is provided with an installation cavity (14), and the end of the installation cavity (14) near the filter screen (4) is provided with a dust discharge port (13). A sealing element (5) is provided on the inner side of the dust discharge port (13), and a cleaning element (7) for cleaning the outer wall of the filter screen (4) is provided on the outer side of the filter screen (4).
8. An air filter for removing formaldehyde dust indoors according to claim 7, characterized in that, The sealing element (5) includes a sealing plate (51) rotatably connected to the inside of the dust outlet (13). A stop block (52) coaxially fixed to the outer side of the housing (1) is rotatably connected to the outer side of the housing (1). A torsion spring (53) is sleeved on the rotating shaft of the sealing plate (51). One end of the torsion spring (53) is welded to the stop block (52), and the other end of the torsion spring (53) is welded to the outer wall of the housing (1).
9. An air filter for removing formaldehyde dust indoors according to claim 8, characterized in that, The cleaning component (7) includes a cylinder (71) fixedly connected to the inside of the protective box (8). A pressure block (72) is fixedly connected to the output end of the cylinder (71). A brush plate (73) that abuts against the outer wall of the filter screen (4) is fixedly connected to one end of the pressure block (72). The pressure block (72) abuts against the sealing plate (51) by moving downward.
10. An air filter for removing formaldehyde dust indoors according to claim 9, characterized in that, The dust collection box (6) is slidably fitted inside the mounting cavity (14), and a handle (61) is fixedly connected to one end of the dust collection box (6).