Centrifugal fan capable of adjusting air volume

Abstract

The application discloses a centrifugal fan capable of adjusting air volume, and aims at adsorbing and cleaning dust contained in air inhaled by a fan body through a wind control assembly. Air passes through a mounting sleeve and is driven to enter a fan pipeline in a spiral air direction under the rotation of a spiral column. Under the action of the spiral air direction, the air slowly moves along the inner wall of the fan pipeline. The dust and particles in the air are adsorbed on the surface of a dust removal bag through a hemispherical groove. The adjusting plate is pushed transversely under the action of wind resistance, the connecting piece is stressed, the dust removal bag is pulled, the dust removal bag protrudes to the outside of the hemispherical groove, and the dust and particles on the surface of the dust removal bag are cleaned by spraying atomized water from a water storage tank and moving to the inner wall of the fan pipeline in the spiral air direction. Dust, pollutants, bacteria and viruses in the air can be effectively removed, so that cleaner air is provided.

Description

Technical Field

[0001] This invention relates to the field of centrifugal fans, and more specifically, to a centrifugal fan with adjustable airflow. Background Technology

[0002] Centrifugal fans are a common type of air handling equipment, typically used in industrial and commercial applications. They use centrifugal force to draw air in from a central inlet, then rotate it at high speed inside and release it at an outlet. This design allows centrifugal fans to generate high-pressure airflows, commonly used for exhaust, ventilation, air conditioning, and air filtration applications. Centrifugal fans consist of several basic components, including a housing, impeller, motor, and drive unit. The housing is typically cylindrical or rectangular, housing the impeller and motor and guiding the inlet and outlet airflow. The impeller is the key component of the centrifugal fan, usually composed of a series of blades. The shape and arrangement of these blades determine the fan's performance. The motor provides power, driving the impeller to rotate and generating airflow.

[0003] The working principle of a centrifugal fan is based on the action of centrifugal force. When the impeller rotates, the air is forced to move outward, thus generating centrifugal force. This increases the air velocity and generates pressure. As air is drawn in from the inlet and passes through the rotating impeller, the pressure gradually increases and is eventually released at the outlet, forming the required air volume and pressure.

[0004] In existing air supply systems, centrifugal fans are used to draw in air from the outside and deliver it into the room. This method can increase the supply of fresh air indoors and is often used in places that require a continuous supply of fresh air, such as offices, commercial buildings, factories, and residences. The delivered air is usually filtered and temperature-controlled (such as heated or cooled) to ensure the comfort of the indoor environment. Although filtration is used to deliver the drawn-in air, some dust and particles will still enter the room with the delivered air, thus affecting the quality of the indoor environment and reducing the comfort of the indoor environment.

[0005] Therefore, in order to address the above-mentioned technical problems, it is necessary to provide a centrifugal fan with adjustable air volume. Summary of the Invention

[0006] The purpose of this invention is to provide a centrifugal fan with adjustable airflow to solve the above-mentioned problems.

[0007] To achieve the above objectives, an embodiment of the present invention provides the following technical solution:

[0008] A centrifugal fan with adjustable airflow includes a fan body and multiple air control components. An air inlet is fixedly connected to the front end of the fan body. A drive motor is fixedly connected to the end of the fan body away from the air inlet. A fan duct is fixedly connected to the upper end of the fan body. A filter screen is fixedly connected to the upper end of the fan duct. An electromagnetic ring is fixedly connected to the inner wall of the upper part of the fan duct. Multiple air control components are fixedly installed on the inner wall of the fan duct. Each air control component includes a hemispherical groove, which is formed on the inner wall of the fan duct. A dust collection bag is fixedly connected to the inner wall of the hemispherical groove. The drive motor drives the fan body to draw air in through the air inlet and discharge it into the fan duct through the air outlet of the fan body. The dust collection bag then adsorbs dust and particles contained in the passing air.

[0009] As a further improvement of the present invention, the wind control component also includes a connector, which is fixedly connected to the end of the dust removal bag away from the inner wall of the hemispherical groove. An adjustment plate is rotatably connected to the end of the connector away from the dust removal bag. The connection is pulled by the wind resistance of the adjustment plate, thereby causing the dust removal bag to bulge out.

[0010] As a further improvement of the present invention, the wind control component also includes a magnetic block, which is fixedly connected to the lower end of the adjustment plate, and the electromagnetic ring and the hemispherical groove are staggered. The electromagnetic ring attracts the magnetic block, thereby changing the rotation of the adjustment plate from vertical to longitudinal, thereby increasing the wind resistance.

[0011] As a further improvement of the present invention, an installation sleeve is fixedly connected to the inner wall of the air outlet of the fan body, and a spiral column is rotatably connected to the inner end of the installation sleeve. The air is blown into the fan duct in a spiral direction by the rotation of the spiral column after passing through the installation sleeve.

[0012] As a further improvement of the present invention, a water storage tank is fixedly connected to the inner wall of the fan duct near the fan body, and multiple spray heads are fixedly connected to the end of the water storage tank away from the fan duct. The water provided by the water storage tank is atomized and sprayed by the spray heads and enters the fan duct under the drive of the spiral wind direction.

[0013] As a further improvement of the present invention, an annular baffle is fixedly connected to the inner end of the fan pipe, and the annular baffle is located at the upper end of the water storage tank. A drain hole is opened at the outer end of the fan pipe. The annular baffle is used to collect and block the seeping water, and then discharge it from the drain hole.

[0014] As a further improvement of the present invention, a recycling box is fixedly connected to the outer end of the fan duct, and the recycling box is connected to the drain hole, so as to centrally recycle the water discharged from the drain hole using the recycling box.

[0015] As a further improvement of the present invention, an inflatable bladder is fixedly connected to the inner end of the fan body, and the inflatable bladder is made of wear-resistant material. A shaping support frame is provided inside the inflatable bladder. The size of the internal space of the fan body is changed by inflating or deflating the inflatable bladder, thereby controlling the wind force. At the same time, the shaping support frame can keep the inflatable bladder in a certain full state when it is not inflated.

[0016] As a further improvement of the present invention, a water supply tank is fixedly connected to the lower end of the drive motor, and the water supply tank is connected to the water storage tank through a pipe. The water supply tank not only supports the drive motor, but also provides water to the water storage tank.

[0017] As a further improvement of the present invention, the dust collection bag is made of a mixture of elastic and dust-absorbing materials. The elastic material makes the dust collection bag resilient enough to be pulled and rebound, while the dust-absorbing material can adsorb dust and particles in the air.

[0018] Compared with the prior art, the advantages of this invention are:

[0019] This solution utilizes a wind control component to adsorb and clean dust from the air drawn into the fan body. Air enters the fan duct in a spiral direction as it passes through the mounting sleeve and is propelled by the rotating spiral column. The spiral direction causes the air to adhere to the inner wall of the duct and move slowly. As the air passes through hemispherical grooves, dust and particles are adsorbed onto the surface of the dust collection bags. The multiple hemispherical grooves increase the airflow path, ensuring that all dust is adsorbed by the dust collection bags. To clean the accumulated dust and particles from the dust collection bag surface, the centrifugal fan's airflow is increased. The system utilizes an electromagnetic ring to attract a magnetic block, causing the adjusting plate to change from a vertical to a horizontal orientation. This horizontal adjustment, combined with wind resistance, pushes the connecting parts, pulling the dust collection bag and causing it to protrude outwards from the hemispherical groove. Atomized water is then sprayed from a water tank, moving with the spiral airflow to the inner wall of the fan duct to clean dust and particles from the dust collection bag surface. This process more effectively removes dust, pollutants, bacteria, and viruses from the air, providing cleaner air and reducing the accumulation of dirt inside the system. This reduces the frequency of maintenance and cleaning, extending the lifespan of the centrifugal fan. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0021] Figure 2 This is a front cross-sectional view of the present invention;

[0022] Figure 3 For the present invention Figure 2 Enlarged structural diagram at point A in the middle;

[0023] Figure 4 For the present invention Figure 2 Enlarged structural diagram at point B;

[0024] Figure 5 This is a schematic diagram of the spiral column structure of the present invention;

[0025] Figure 6 This is a schematic diagram of the changing structure of the risk control component of the present invention.

[0026] Explanation of the labels in the diagram:

[0027] 1. Fan body; 2. Air inlet; 3. Drive motor; 4. Fan duct; 5. Filter screen; 6. Air control components; 61. Hemispherical groove; 62. Dust collection bag; 63. Connector; 64. Adjusting plate; 65. Magnetic block; 7. Mounting sleeve; 8. Spiral column; 9. Water tank; 10. Spray head; 11. Annular baffle; 12. Drain hole; 13. Recycling box; 14. Inflatable bag; 15. Water supply tank; 16. Electromagnetic ring. Detailed Implementation

[0028] 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. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0029] First implementation method:

[0030] Please see Figure 1-6 A centrifugal fan with adjustable airflow includes a fan body 1 and multiple air control components 6. An air inlet 2 is fixedly connected to the front end of the fan body 1, and a drive motor 3 is fixedly connected to the end of the fan body 1 furthest from the air inlet 2. An electromagnetic ring is fixedly connected to the upper end of the fan body 1 via a fan duct 4. A filter screen 5 is fixedly connected to the upper end of the fan duct 4. The filter screen 5 is a mechanical filter that uses physical barriers such as mesh, fiber pads, or filter paper to capture and remove airborne particles. This is the most common type of filtration, suitable for removing larger particles. High-efficiency particulate air (HEPA) filters, activated carbon filters, and electrostatic filters can also be used. Since water is involved, mechanical filtration is preferred. HEPA filters can remove 99.97% of particles 0.3 microns and larger. HEPA filters are ideal for environments requiring very clean air, such as hospitals and high-tech manufacturing facilities. Activated carbon filters utilize the adsorption properties of activated carbon to remove gaseous and odorous pollutants from the air. This type of filter is commonly used to treat chemical gases, fumes, and odors. Electrostatic filters use electrostatic forces to attract and capture tiny particles. This filter is particularly effective at capturing smoke, pollen, and fine dust particles.

[0031] Please see Figure 3 Multiple air control components 6 are fixedly installed on the inner wall of the fan duct 4. Each air control component 6 includes a hemispherical groove 61, which is formed on the inner wall of the fan duct 4. A dust collection bag 62 is fixedly connected to the inner wall of the hemispherical groove 61. The air control component 6 also includes a connector 63, which is fixedly connected to the end of the dust collection bag 62 away from the inner wall of the hemispherical groove 61. An adjusting plate 64 is rotatably connected to the end of the connector 63 away from the dust collection bag 62. The air control component 6 also includes a magnetic block 65, which is fixedly connected to the adjusting plate 64. At the lower end of the 4, the electromagnetic ring 16 and the hemispherical groove 61 are staggered. The dust and particles contained in the air entering the fan duct 4 are adsorbed by the dust collection bag 62. After the electromagnetic ring 16 is magnetized by an external power supply, it attracts the magnetic block 65, causing the adjusting plate 64 to rotate from horizontal to vertical, thereby increasing the wind resistance. Under the strong wind, the magnetic block 65 pulls the dust collection bag 62 out of the hemispherical groove 61. Then, by increasing the air volume, the dust and particles adsorbed on the outer end face of the dust collection bag 62 can be cleaned.

[0032] The dust collection bag 62 is made of a mixture of elastic and suction materials. It can be an elastic polymer-based composite material, composed of an elastic matrix such as rubber or a flexible polymer combined with suction-functional fillers such as activated carbon or specific fibers; elastic textiles combined with suction functionality, typically a blend of suction-functional fibers and elastic fibers such as spandex; elastic foam composite materials, in which suction-functional microparticles, such as microfibers, are embedded into elastic foam; or a combination of elastic sponge and microfibers, combining the soft elasticity of sponge with the efficient suction power of microfibers. Therefore, when the dust collection bag 62 is pulled out of the hemispherical groove 61 and the exhaust volume is low, it can automatically return to the hemispherical groove 61 under its elastic action.

[0033] Please see Figure 4 An installation sleeve 7 is fixedly connected to the inner wall of the air outlet of the fan body 1. A spiral column 8 is rotatably connected to the inner end of the installation sleeve 7. The fan body 1 pushes the air to the installation sleeve 7, and under the rotation of the spiral column 8, the air is spirally discharged into the fan duct 4. This causes the spiral air to move slowly along the inner wall of the fan duct 4. Due to the spiral action, the air can fully contact the hemispherical groove 61, so that dust and particles can be fully adsorbed by the dust collection bag 62.

[0034] A water storage tank 9 is fixedly connected to the inner wall of the fan duct 4 near the fan body 1. Multiple spray nozzles 10 are fixedly connected to the end of the water storage tank 9 away from the fan duct 4. The water discharged from the water storage tank 9 is atomized by the spray nozzles 10 and then enters the fan duct 4 under the drive of the spiral wind. When the wind passes through the water mist, it will form an air flow around the water droplets, which can further promote the carrying and dispersion of water droplets, so that there is enough moisture in the wind, which facilitates the cleaning of the dust collection bag 62.

[0035] Please see Figure 1 and Figure 4 A water supply tank 15 is fixedly connected to the lower end of the drive motor 3, and the water supply tank 15 is connected to the water storage tank 9 through a pipe. The water supply tank 15 provides water to the water storage tank 9 and supports the drive motor 3. Under the action of gravity of the water, the water supply tank 15 is more stable, which makes the drive motor 3 run more stably. Therefore, the operation of the fan body 1 will also be stable.

[0036] An annular baffle 11 is fixedly connected to the inner end of the fan duct 4, and the annular baffle 11 is located at the upper end of the water storage tank 9. A drain hole 12 is opened at the outer end of the fan duct 4, and a recycling box 13 is fixedly connected to the outer end of the fan duct 4. The recycling box 13 is connected to the drain hole 12. The annular baffle 11 catches and blocks the water seeping down the inner wall of the fan duct 4, and the water flows into the recycling box 13 through the drain hole 12 for recycling.

[0037] Please see Figure 2 An inflatable bladder 14 is fixedly connected to the inner end of the blower body 1. The inflatable bladder 14 is equipped with a shaping support frame. By inflating and deflating the inflatable bladder 14, the inner diameter of the blower body 1 can be changed. Since there is a larger space, theoretically there can be a larger rotation radius, which will increase the centrifugal force, thereby increasing the wind force and air volume. This allows for control of the air volume and the power of the drive motor 3 to control the air volume and wind force. At the same time, the shaping support frame can keep the inflatable bladder in a certain full state when it is not inflated, so that the inflatable bladder will not be blown by the wind due to being too deflated when it is not inflated, thus preventing vibration and noise.

[0038] The inflatable bladder 14 is made of abrasion-resistant materials, such as polyurethane-coated nylon, polyvinyl chloride (PVC), polyester-coated PVC, ethylene-vinyl acetate copolymer, or Teflon-coated fabric. Nylon offers high abrasion and tear resistance, while the polyurethane coating provides additional water and chemical resistance. This combination makes the material not only strong but also resistant to various environmental factors. PVC is a cost-effective material with good water, chemical, and abrasion resistance, and its flexibility and cold resistance can be enhanced by adding plasticizers. Polyester-coated PVC combines the high strength of polyester with the environmental resistance of PVC, providing additional abrasion resistance and durability. Ethylene-vinyl acetate copolymer is a lightweight, soft, and well-cushioned material that is also water-resistant and chemically stable. Teflon-coated fabric has excellent temperature resistance, chemical resistance, and an extremely low coefficient of friction, making it ideal for use in extreme environmental conditions.

[0039] Working principle:

[0040] The drive motor 3 starts the fan, allowing air to enter the fan body 1 through the air inlet 2. Then, driven by the spiral column 8 and the mounting sleeve 7, the air spirals into the fan duct 4. Under the spiral action, the air moves tightly against the inner wall of the fan duct 4, causing dust and particles in the air to be adsorbed onto the outer surface of the dust collection bag 62. Because the magnetic block 65 is relatively heavy, the adjusting plate 64 remains vertical, and the airflow is normal. When the dust collection bag 62 accumulates a lot of dust and needs cleaning, the fan body 1's airflow is increased, and the controller frequency is adjusted to allow more or less air to enter the fan duct 4. Simultaneously, water mist is sprayed, allowing water and air to enter the fan together. Pipe 4 uses an electromagnetic ring 16 to attract the magnetic block 65, causing the adjusting plate 64 to rotate from vertical to horizontal. Here, the rotation of the adjusting plate 64 is blocked by the limiting block at its connection point, and it can only rotate 90° horizontally, thereby increasing the wind resistance. Under the action of resistance, the connecting piece 63 is pulled to bulge out of the hemispherical groove 61. Then, the water mist accompanying the wind cleans the dust on the surface of the dust collection bag 62. At the same time, when controlling the wind frequency and air volume, under the action of the elasticity of the dust collection bag 62 itself, the wind drives the adjusting plate 64 to swing. Under its vibration amplitude, the dust and particles attached to the outer end face of the dust collection bag 62 can also be more easily cleaned off by the wind.

[0041] Improving centrifugal fan filtration not only enhances air quality and removes pollutants, but more effective filtration removes dust, contaminants, bacteria, and viruses, providing cleaner air. It also reduces the risk of respiratory illnesses and other health problems, especially in sensitive areas such as hospitals, laboratories, and food processing plants. Furthermore, a clean filtration system reduces fan operating resistance, thus lowering energy consumption and improving system efficiency. Enhanced performance ensures smooth airflow, helping to maintain the designed airflow and pressure, improving overall performance. Reduced maintenance costs and extended equipment lifespan are achieved by preventing dust and other particles from entering the fan and related equipment, reducing wear and corrosion, and extending equipment lifespan. Finally, reduced cleaning and repairs are minimized by better filtration, reducing the accumulation of dirt inside the system and thus decreasing the frequency of maintenance and cleaning.

[0042] As can be seen from the above technical solutions, the present invention has the following beneficial effects:

[0043] This solution utilizes the wind control component 6 to adsorb and clean dust from the air drawn into the fan body 1. Air passes through the mounting sleeve 7 and, driven by the rotation of the spiral column 8, enters the fan duct 4 in a spiral direction. Under the influence of the spiral direction, the air adheres to the inner wall of the fan duct 4 and moves slowly. As the air passes through the hemispherical grooves 61, dust and particles in the air are adsorbed onto the surface of the dust collection bags 62. Furthermore, the multiple hemispherical grooves 61 increase the airflow path, ensuring that all dust in the air is adsorbed by the dust collection bags 62. When cleaning the dust and particles accumulated on the surface of the dust collection bags 62, the centrifugal fan's airflow is increased to further enhance the cleaning process. The electromagnetic ring 16 attracts the magnetic block 65, causing the adjusting plate 64 to change from vertical to horizontal. The horizontal movement of the adjusting plate 64, under the action of wind resistance, pushes the connecting piece 63, which in turn pulls the dust collection bag 62, causing the dust collection bag 62 to protrude to the outside of the hemispherical groove 61. Then, the water tank 9 sprays atomized water, which moves with the spiral wind direction to the inner wall of the fan duct 4, cleaning the dust and particles on the surface of the dust collection bag 62. This can more effectively remove dust, pollutants, bacteria and viruses from the air, thereby providing cleaner air and reducing the accumulation of dirt inside the system, thus reducing the frequency of maintenance and cleaning and increasing the service life of the centrifugal fan.

[0044] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from its spirit or essential characteristics. Therefore, the embodiments should be considered in all respects as exemplary and non-limiting, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within the present invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0045] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style of the specification is merely for clarity. Those skilled in the art should regard the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other implementation methods that can be understood by those skilled in the art.

Claims

1. A centrifugal fan with adjustable airflow, characterized in that: include: A fan body (1) is fixedly connected to an air inlet (2) at the front end of the fan body (1), and a drive motor (3) is fixedly connected to the end of the fan body (1) away from the air inlet (2). A fan duct (4) is fixedly connected to the upper end of the fan body (1), and a filter screen (5) is fixedly connected to the upper end of the fan duct (4). An electromagnetic ring (16) is fixedly connected to the inner wall of the fan duct (4). The wind control component (6) is a plurality of wind control components (6), and the plurality of wind control components (6) are fixedly installed on the inner wall of the fan duct (4). The wind control component (6) includes a hemispherical groove (61), and the plurality of hemispherical grooves (61) are opened on the inner wall of the fan duct (4). A dust removal bag (62) is fixedly connected to the inner wall of the hemispherical groove (61). The wind control component (6) also includes a connector (63), which is fixedly connected to the end of the dust removal bag (62) away from the inner wall of the hemispherical groove (61), and an adjustment plate (64) is rotatably connected to the end of the connector (63) away from the dust removal bag (62). The wind control component (6) also includes a magnetic block (65), which is fixedly connected to the lower end of the adjustment plate (64). The inner wall of the fan duct (4) is inlaid with multiple electromagnetic rings (16) that match the adjustment plate (64), and the electromagnetic rings (16) and the hemispherical groove (61) are staggered. An air bladder (14) is fixedly connected to the inner end of the fan body (1), and the air bladder (14) is made of wear-resistant material; The dust collection bag (62) is made of a mixture of elastic and dust-absorbing materials.

2. A centrifugal fan with adjustable airflow according to claim 1, characterized in that: An installation sleeve (7) is fixedly connected to the inner wall of the air outlet of the fan body (1), and a spiral column (8) is rotatably connected to the inner end of the installation sleeve (7).

3. A centrifugal fan with adjustable airflow according to claim 1, characterized in that: A water storage tank (9) is fixedly connected to the inner wall of the fan duct (4) near the fan body (1), and multiple spray heads (10) are fixedly connected to the end of the water storage tank (9) away from the fan duct (4).

4. A centrifugal fan with adjustable airflow according to claim 1, characterized in that: The inner end of the fan pipe (4) is fixedly connected to an annular baffle (11), and the annular baffle (11) is located at the upper end of the water storage tank (9). The outer end of the fan pipe (4) is provided with a drain hole (12).

5. A centrifugal fan with adjustable airflow according to claim 4, characterized in that: The outer end of the fan pipe (4) is fixedly connected to a recycling box (13), and the recycling box (13) is connected to the drain hole (12).

6. A centrifugal fan with adjustable airflow according to claim 3, characterized in that: The lower end of the drive motor (3) is fixedly connected to a water supply tank (15), and the water supply tank (15) is connected to the water storage tank (9) through a pipe.

Images