A formaldehyde removal and air purification device added with metal organic framework material MOFs

Abstract

This utility model relates to the field of air purification technology and discloses a formaldehyde removal and air purification device with added metal-organic framework (MOF) materials. It includes a housing with an air duct at the top and a motor inside the duct. The motor's output end is connected to a fan blade below the duct. An air inlet communicating with the air duct is located at the top of the housing. An air distribution mechanism is located below the fan blade. A filter screen and an MOF filter plate are movably installed inside the housing below the air distribution mechanism, with one end of each filter screen and MOF filter plate extending outside the housing. A sealing plate is detachably installed on one side of the housing corresponding to the filter screen and MOF filter plate. Using the air distribution mechanism, the motor drives a sprocket, chain-driven rotating rod, and cam to rotate, causing the drive frame and transmission rod to reciprocate. The drive column and linear drive groove cooperate to rotate the shaft and guide plate, achieving uniform air distribution and improving the purification effect and utilization rate of the filter screen and MOF filter plate. The drive plate can also be pushed to disengage the locking block from the slot to remove the sealing plate, thereby allowing for the removal and replacement of the fan blade and filter screen.

Description

Technical Field

[0001] This utility model relates to the field of air purification technology, and in particular to a formaldehyde removal and air purification device with added metal-organic framework materials (MOFs). Background Technology

[0002] With the increasing use of indoor decoration and furniture, formaldehyde, as a long-term released volatile pollutant, poses a significant threat to human health, making indoor formaldehyde purification an urgent need. Metal-organic frameworks (MOFs), with their ultra-high specific surface area, customizable nanopores, and excellent adsorption selectivity, can efficiently capture formaldehyde. Some MOFs loaded with catalytic components can also decompose formaldehyde into harmless substances, making them a new generation of formaldehyde removal materials to replace traditional activated carbon. Developing formaldehyde removal and purification devices based on MOFs has become an important technological direction.

[0003] However, existing related devices, especially traditional formaldehyde removal devices, mostly adopt a simple design of "fans blowing directly onto the filter material", which results in uneven airflow distribution on the surface of the filter material - the airflow is concentrated in the central area, while the airflow is difficult to reach the edge and corner areas. This makes it impossible to fully utilize the filter adsorption material (including MOFs), which not only wastes the material's adsorption potential and shortens the filter material's lifespan, but also reduces the device's formaldehyde removal efficiency. Some formaldehyde-containing air may even be "short-circuited" and discharged, making it difficult to meet the stable indoor purification needs. Utility Model Content

[0004] Given that most existing formaldehyde removal and purification devices adopt a "fan directly blowing filter material" design, which easily leads to uneven airflow distribution of the filter material, insufficient material utilization, shortened filter material life, reduced formaldehyde removal efficiency, and even "short-circuit" discharge of formaldehyde-containing air, making it difficult to meet the stable indoor purification needs, this utility model is proposed.

[0005] To solve the above-mentioned technical problems, this utility model provides the following technical solution: a formaldehyde removal and air purification device with added metal-organic framework (MOF) materials, including a box body, an air duct at the top of the box body, a motor in the air duct, and a fan blade connected to the output end of the motor below the air duct. An air inlet communicating with the air duct is opened at the top of the box body, and an air distribution mechanism is provided below the fan blade. A filter screen and an MOF filter plate are movably installed in the box body below the air distribution mechanism, and one end of the filter screen and the MOF filter plate extends out of the box body. A sealing plate is detachably installed on one side of the box body corresponding to the filter screen and the MOF filter plate. Several air outlets are symmetrically opened on the lower side wall of the box body. The air distribution mechanism includes a rotating shaft, and there are several rotating shafts. The rotating shafts are rotatably installed below the fan blades inside the housing, and a guide plate is sleeved on the outer wall of the rotating shaft.

[0006] As a preferred embodiment, the air distribution mechanism further includes a rotating rod, which is rotatably mounted on the back of the housing. A sprocket one and a sprocket two are respectively fitted onto the outer wall of the rotating rod and the outer wall of the motor's output end, and the sprocket one and sprocket two are connected by a chain. A cam is fitted onto one side of the outer wall of the rotating rod near the sprocket one, and a drive frame is fitted onto the outer side of the cam. A transmission rod is connected to one end of the drive frame near the cam. Several drive columns are provided at the end of the transmission rod away from the drive frame. A connecting rod is correspondingly provided on one side of each drive column, and one end of the connecting rod is fixedly fitted onto the outer wall of one end of the rotating shaft. A linear drive groove adapted to the drive column is opened on one side of the connecting rod. A guide rod is provided inside the housing, and the guide rod passes through the transmission rod.

[0007] As a preferred embodiment, the diameter of the first sprocket is larger than the diameter of the second sprocket, the cam has an elliptical structure, and the drive frame is U-shaped.

[0008] As a preferred embodiment, a ball bearing is movably embedded at the lower end of the drive column, and several drive columns are arranged in a linear equidistant array, with the rotating shaft fixedly connected to the guide plate.

[0009] As a preferred embodiment, the box body is symmetrically provided with fixed seats on both sides, and the sealing plate is connected to connecting plates at both ends. One end of the connecting plate is inserted into the fixed seat. A drive plate is movably installed in the fixed seat on the side of the connecting plate away from the box body, and the upper end of the drive plate extends outside the fixed seat. A locking block is connected to the lower end of the drive plate. A slot adapted to the locking block is opened at the lower end of the connecting plate. A sliding rod is provided in the fixed seat on the side of the drive plate away from the connecting plate. A slider is slidably sleeved on the outside of the sliding rod. A spring is sleeved on the outside of the sliding rod below the slider, and the two ends of the spring are fixedly connected to the slider and the inner wall of the fixed seat, respectively.

[0010] As a preferred embodiment, grooves are provided symmetrically on both sides of the housing, and a second filter screen is magnetically connected to each groove. The grooves are connected to the air outlet.

[0011] Compared with the prior art, the present invention has at least the following beneficial effects: 1. This utility model, through its air distribution mechanism, allows the motor to drive sprocket two, which in turn drives sprocket one via chain transmission, causing the rotating rod to rotate. This, in turn, causes the cam to rotate synchronously. The cam then drives the drive frame, which in turn drives the transmission rod to reciprocate under the guidance and limit of the guide rod. This, in turn, causes several drive columns to move synchronously. This, in conjunction with the linear drive groove, drives the connecting rod to rotate the connected shaft in both directions, thereby causing the guide plate to rotate synchronously. This changes the direction of the blown air, ensuring that the air is evenly distributed within the housing. This allows for better contact with the MOFs filter plates and filter screen one for filtration, adsorption, and removal of formaldehyde, as well as air purification. This improves the treatment effect and the utilization efficiency of filter screen one, making it more convenient to use.

[0012] 2. This utility model pushes the drive plate down, causing the drive plate to move the locking block and the slider synchronously. As the slider slides along the slide rod, it will squeeze the spring until the locking block moves out of the slot opened at the lower end of the connecting plate, releasing the limitation on the connecting plate. Then, the sealing plate is pulled to disassemble it, so that the fan blade and filter screen can be pulled out, disassembled and replaced. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 This is a cross-sectional structural diagram of the present invention; Figure 3 This is a schematic diagram of the structure between the motor, guide plate and rotating rod of this utility model; Figure 4 This is a schematic diagram of the structure between the rotating rod, the drive frame, and the connecting rod of this utility model; Figure 5 This is a schematic diagram of the connecting rod of this utility model; Figure 6 This is a schematic diagram of the structure between the fixing seat and the sealing plate of this utility model.

[0014] Explanation of reference numerals in the attached figures: 1. Housing; 2. Air duct; 3. Motor; 4. Fan blade; 5. Filter screen one; 6. MOF filter plate; 7. Sealing plate; 8. Air outlet; 9. Shaft; 10. Guide plate; 11. Rotating rod; 12. Sprocket one; 13. Chain; 14. Sprocket two; 15. Cam; 16. Drive frame; 17. Transmission rod; 18. Drive column; 19. Connecting rod; 20. Linear drive groove; 21. Fixed base; 22. Connecting plate; 23. Drive plate; 24. Slide rod; 25. Slider; 26. Spring; 27. Locking block; 28. Filter screen two; 29. ​​Guide rod. Detailed Implementation

[0015] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, the specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings.

[0016] Reference Figure 1 - Figure 6As shown, a formaldehyde removal and air purification device with added metal-organic framework (MOF) materials is provided. It includes a housing 1, an air duct 2 at the top of the housing 1, a motor 3 inside the air duct 2, and a fan blade 4 connected to the output end of the motor 3 below the air duct 2. An air inlet communicating with the air duct 2 is opened at the top of the housing 1. In this example, a dust filter is installed inside the air inlet to intercept external dust. An air distribution mechanism is located below the fan blade 4. A filter screen 5 and an MOF filter plate 6 are movably installed and mounted inside the housing 1 below the air distribution mechanism, with one end of the filter screen 5 and the MOF filter plate 6 extending outside the housing 1. A section on one side of the housing 1 corresponding to the filter screen 5 and the MOF filter plate 6 is... The enclosure 1 has a detachable and removable sealing plate 7, and several air outlets 8 are symmetrically opened on the lower side wall of the box. The air inlet and the air duct 2 work together to efficiently introduce indoor air. The fan blades 4 provide power for airflow. The air distribution mechanism can optimize airflow distribution. The filter screen 5 can filter dust, hair and other impurities in the air to prevent them from clogging the nanopores of the MOFs filter plate 6, thus ensuring the adsorption and catalytic effect of the MOFs filter plate 6 on formaldehyde. The MOFs filter plate 6 is movably embedded and extends outside the box 1. The sealing plate 7 is detachable, which facilitates the replacement and maintenance of the filter screen 5 and the MOFs filter plate 6. The symmetrical opening of the air outlets 8 can make the purified air evenly discharged, improving the indoor air circulation efficiency. The air distribution mechanism includes a rotating shaft 9, and there are several rotating shafts 9. Several rotating shafts 9 are rotatably installed below the fan blades 4 inside the housing 1. The outer wall of the rotating shaft 9 is fitted with a guide plate 10. The several rotating shafts 9 can stably support the guide plate 10. The guide plate 10 can change the direction of the airflow blown out by the fan blades 4 by rotating, avoiding the airflow from concentrating in the central area of ​​the filter material, so that the airflow covers the filter screen 5 and the MOF filter plate 6 more evenly, making full use of the filtration capacity of the filter screen 5 and the adsorption and catalytic capacity of the MOF filter plate 6, and improving the overall purification efficiency of the device.

[0017] In this example, the air distribution mechanism also includes a rotating rod 11, which is rotatably mounted on the back of the housing 1. A first sprocket 12 and a second sprocket 14 are respectively fitted onto the outer wall of the rotating rod 11 and the outer wall of the output end of the motor 3, and are connected by a chain 13. A cam 15 is fitted onto the outer wall of the rotating rod 11 on one side of the first sprocket 12. A drive frame 16 is fitted onto the outer side of the cam 15. A transmission rod 17 is connected to one end of the drive frame 16 on one side of the cam 15. Several drive columns 18 are provided on the end of the drive rod 17 away from the drive frame 16. A connecting rod 19 is correspondingly provided on one side of each drive column 18, and one end of the connecting rod 19 is fixedly fitted onto the outer wall of one end of the rotating shaft 9. A linear drive groove 20 adapted to the drive column 18 is opened on one side of the connecting rod 19. The device is equipped with a guide rod 29, which passes through the transmission rod 17. The output of the motor 3 simultaneously drives the fan blade 4 and the second sprocket 14, eliminating the need for an additional power source and saving energy and space. The chain 13 drives the transmission between the first sprocket 12 and the second sprocket 14, which in turn drives the rotating rod 11 and the cam 15 to rotate. The cam 15 drives the drive frame 16 and the transmission rod 17 to reciprocate under the guidance of the guide rod 29. The drive column 18 and the linear drive groove 20 work together to drive the connecting rod 19 and the rotating shaft 9 to rotate in both directions, so that the guide plate 10 can automatically and continuously adjust its angle, further optimizing the uniformity of airflow distribution, ensuring that the high specific surface area of ​​the MOF filter plate 6 is fully utilized, improving the formaldehyde adsorption and decomposition efficiency, and ensuring strong structural linkage and stable and reliable operation.

[0018] In this example, the diameter of sprocket 12 is larger than that of sprocket 14, cam 15 has an elliptical structure, and drive frame 16 is U-shaped. The larger diameter of sprocket 12 enables speed reduction transmission, ensuring that the rotation speed of rod 11 and cam 15 is moderate, preventing excessive airflow fluctuations caused by excessively fast reciprocating motion of transmission rod 17, and ensuring stable airflow distribution. The elliptical cam 15 can drive drive frame 16 to produce regular reciprocating motion, providing stable power to transmission rod 17. The U-shaped drive frame 16 can fit tightly against the outer side of cam 15, ensuring that cam 15 can stably drive drive frame 16 to move when rotating, reducing the risk of structural loosening or jamming, and improving the operational stability of the air distribution mechanism.

[0019] In this example, a ball bearing is movably embedded at the lower end of the drive column 18, and several drive columns 18 are arranged in a linear equidistant array. The rotating shaft 9 is fixedly connected to the guide plate 10. The ball bearing at the lower end of the drive column 18 can convert the sliding friction between the drive column 18 and the inner wall of the housing 1 into rolling friction, reducing component wear, extending service life, and reducing transmission resistance, making the drive column 18 drive the connecting rod 19 to rotate more smoothly. The linear equidistant array of the drive columns 18 can make several connecting rods 19 and the rotating shaft 9 synchronously and evenly stressed, ensuring that the angle adjustment of all guide plates 10 is consistent, further improving the uniformity of airflow distribution. The fixed connection between the rotating shaft 9 and the guide plate 10 can prevent the guide plate 10 from rotating relative to the rotating shaft 9 under the impact of airflow, ensuring the stability of the guide plate 10's adjustment effect on the airflow direction.

[0020] In this example, the box body 1 is symmetrically provided with fixed seats 21 on both sides. The two ends of the sealing plate 7 are respectively connected to connecting plates 22, and one end of the connecting plate 22 is inserted into the fixed seat 21. The side of the connecting plate 22 away from the box body 1 is movably installed with a drive plate 23 in the fixed seat 21, and the upper end of the drive plate 23 extends outside the fixed seat 21. The lower end of the drive plate 23 is connected to a locking block 27. The lower end of the connecting plate 22 has a locking groove that matches the locking block 27. The fixed seat 21 is provided with a sliding rod 24 on the side of the drive plate 23 away from the connecting plate 22. A slider 25 is slidably sleeved on the outside of the sliding rod 24. A spring 26 is sleeved on the outside of the sliding rod 24 below the slider 25. The ends are fixedly connected to the inner walls of the slider 25 and the fixed base 21, respectively. The fixed base 21 and the connecting plate 22 cooperate to provide a stable installation base for the sealing plate 7. The drive plate 23 drives the locking block 27 to engage or disengage from the slot, which can quickly realize the installation and disassembly of the sealing plate 7. The operation is convenient and no additional tools are required. The slide rod 24 guides the slider 25. The spring 26 pushes the slider 25 and the drive plate 23 through elastic restoring force to ensure that the locking block 27 is stably engaged with the slot, preventing the sealing plate 7 from loosening and falling off during the operation of the device. At the same time, disassembly only requires pushing the drive plate 23, which facilitates timely replacement of the filter screen 5 and MOF filter plate 6 and ensures the continuous purification capability of the device.

[0021] In this example, grooves are provided on both sides of the housing 1, and filter screen 28 is magnetically connected in the grooves. The grooves are connected to the air outlet 8. The magnetic connection makes it easier to disassemble and clean filter screen 28, which is convenient for users to maintain regularly. At the same time, the grooves are connected to the air outlet 8 to ensure that filter screen 28 can effectively cover the air outlet path, intercept external dust, and not affect the air exhaust efficiency.

[0022] During use, air is introduced and initially guided: After the device is started, the motor 3 is powered on and rotates, driving the fan blades 4 connected to the output end to rotate, forming a negative pressure at the top of the box 1. The formaldehyde-containing air in the room enters the device through the air inlet connected to the air duct 2 at the top of the box 1. At the same time, the output end of the motor 3 drives the sprocket 14 to rotate synchronously. Through the transmission of the chain 13, the rotating rod 11 with the sprocket 12 is driven to rotate, providing power for the air distribution mechanism, and initially realizing the introduction of air and the transmission of air distribution power.

[0023] Airflow uniform distribution adjustment: When the rotating rod 11 rotates, the elliptical cam 15 sleeved on its outer wall rotates synchronously. The cam 15 drives the transmission rod 17 through the outer U-shaped drive frame 16, and makes reciprocating motion under the guidance and limit of the guide rod 29 in the housing 1. Several drive columns 18 at one end of the transmission rod 17 move synchronously with it. The drive columns 18 slide in the linear drive groove 20 of the connecting rod 19, driving the connecting rod 19 and the fixedly sleeved rotating shaft 9 to rotate in both directions. This causes the guide plate 10 fixedly connected to the outer wall of the rotating shaft 9 to continuously adjust its angle, so as to evenly guide the airflow blown by the fan blade 4 to the filter material area below, avoid uneven airflow distribution, and ensure that the airflow and filter material are in full contact.

[0024] Multi-stage filtration and formaldehyde treatment: The evenly distributed airflow first flows through the upper and lower movable embedded filter screen 5. Filter screen 5 intercepts impurities such as dust and hair in the air, preventing impurities from clogging the nanopores of MOFs filter plate 6. Then the airflow enters the area of ​​MOFs filter plate 6, where formaldehyde molecules in the airflow are efficiently physically adsorbed. The MOFs material, which is partially loaded with catalytically active components, can also catalytically decompose the adsorbed formaldehyde into harmless CO2 and H2O at room temperature, achieving synergistic formaldehyde removal through "adsorption-decomposition".

[0025] Filter media maintenance and continuous operation of the device: After the device has been running for a period of time, if it is necessary to replace filter screen 5 or MOFs filter plate 6, the drive plate 23 in the fixed base 21 can be pushed down. The drive plate 23 drives the locking block 27 to disengage from the slot of the connecting plate 22, and at the same time squeezes the spring 26 sleeved on the outside of the slide rod 24. After releasing the limit on the connecting plate 22, the sealing plate 7 on one side of the box 1 can be removed, and the filter screen 5 and MOFs filter plate 6 extending outside the box 1 can be pulled out and replaced. After the replacement is completed, the sealing plate 7 is reinstalled. The spring 26 elastically resets and pushes the drive plate 23 and the locking block 27 to reset and engage, ensuring that the sealing plate 7 is stably installed and ensuring the continued efficient operation of the device.

[0026] It should be noted that the above embodiments are only used to illustrate the technical solution of this utility model and are not intended to limit it. Although this utility model 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 solution of this utility model without departing from the spirit and scope of the technical solution of this utility model, and all such modifications or substitutions should be covered within the scope of the claims of this utility model.

Claims

1. A formaldehyde removal and air purification device with added metal-organic framework (MOF) materials, comprising a housing (1), characterized in that: The top of the box (1) is provided with an air duct (2), the air duct (2) is provided with a motor (3), and the output end of the motor (3) is connected to a fan blade (4) below the air duct (2). The top of the box (1) is provided with an air inlet that communicates with the air duct (2). The fan blade (4) is provided with an air distribution mechanism. The box (1) is provided with a filter screen (5) and a MOF filter plate (6) that are installed vertically below the air distribution mechanism. One end of the filter screen (5) and the MOF filter plate (6) extends to the outside of the box (1). A sealing plate (7) is detachably installed on one side of the box (1) corresponding to the filter screen (5) and the MOF filter plate (6). Several air outlet holes (8) are symmetrically opened on the lower side wall of the box (1). The air distribution mechanism includes a rotating shaft (9), and there are several rotating shafts (9). Several rotating shafts (9) are rotatably installed below the fan blades (4) inside the housing (1). A guide plate (10) is sleeved on the outer wall of the rotating shaft (9).

2. The formaldehyde removal and air purification device with added metal-organic framework (MOF) materials according to claim 1, characterized in that: The air distribution mechanism also includes a rotating rod (11), which is rotatably mounted on the back of the housing (1). The outer wall of the rotating rod (11) and the outer wall of the output end of the motor (3) are respectively fitted with a sprocket one (12) and a sprocket two (14), and the sprocket one (12) and the sprocket two (14) are connected by a chain (13). A cam (15) is fitted on the outer wall of the rotating rod (11) on one side of the sprocket one (12), and a drive frame (16) is fitted on the outer side of the cam (15). A transmission rod (17) is connected to one side of the cam (15). The transmission rod (17) is provided with several drive columns (18) at the end away from the drive frame (16). A connecting rod (19) is provided on one side of the drive column (18), and one end of the connecting rod (19) is fixedly sleeved on the outer wall of one end of the rotating shaft (9). A linear drive groove (20) adapted to the drive column (18) is opened on one side of the connecting rod (19). A guide rod (29) is provided inside the housing (1), and the guide rod (29) passes through the transmission rod (17).

3. The formaldehyde removal and air purification device with added metal-organic framework (MOF) materials according to claim 2, characterized in that: The diameter of the first sprocket (12) is greater than the diameter of the second sprocket (14), the cam (15) is elliptical, and the drive frame (16) is U-shaped.

4. The formaldehyde removal and air purification device with added metal-organic framework (MOF) materials according to claim 3, characterized in that: The lower end of the drive column (18) is movably embedded with a ball bearing, and several drive columns (18) are arranged in a linear equidistant array. The rotating shaft (9) is fixedly connected to the guide plate (10).

5. The formaldehyde removal and air purification device with added metal-organic framework (MOF) materials according to claim 2, characterized in that: The box body (1) is symmetrically provided with fixed seats (21) on both sides. The sealing plate (7) is connected to the two ends of the connecting plate (22) respectively. One end of the connecting plate (22) is inserted into the fixed seat (21). The connecting plate (22) is movably installed in the fixed seat (21) on the side away from the box body (1). The upper end of the driving plate (23) extends to the outside of the fixed seat (21). The lower end of the driving plate (23) is connected to the card block (27). The lower end of the connecting plate (22) is provided with a card slot that matches the card block (27). The fixed seat (21) is provided with a sliding rod (24) on the side of the driving plate (23) away from the connecting plate (22). The sliding rod (24) is slidably sleeved with a slider (25) on the outside. The sliding rod (24) is sleeved with a spring (26) below the slider (25) on the outside. The two ends of the spring (26) are fixedly connected to the slider (25) and the inner wall of the fixed seat (21) respectively.

6. The formaldehyde removal and air purification device with added metal-organic framework (MOF) materials according to claim 2, characterized in that: The box body (1) has grooves on both sides at symmetrical positions. A filter screen (28) is magnetically connected in the groove. The groove is connected to the air outlet (8).

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