Centrifugal fan for airflow dust removal

Abstract

The centrifugal fan comprises a fan shell, an air inlet, an air guide wheel and an air outlet, the air inlet is formed in the bottom of the fan shell, the air guide wheel is rotationally connected to the upper portion of the air inlet and driven by a motor on the inner wall of the fan shell, the air outlet is formed in the outer wall of the fan shell, and the air outlet is rotationally connected to the upper portion of the air inlet. An energy-saving assembly used for assisting in air inlet is arranged below the air inlet, a separation assembly used for separating diffuse particles and impurities is arranged in the fan shell, the purpose of collecting the particles and the impurities is achieved through the arrangement of the separation assembly, and compared with a traditional centrifugal fan which depends on a simple filter screen or gravity sedimentation and other modes, the energy-saving effect is better. Compared with the prior art, the device has a better separation effect on small particles and impurities with different densities, improves the purity of exhausted gas, achieves the purpose of collecting the particles and the impurities, and avoids the problems of increase of airflow resistance, fluctuation of air volume and air pressure and the like caused by impurity accumulation.

Description

Technical Field

[0001] The invention relates to the field of fans, and in particular to a centrifugal fan for airflow dust removal. Background Art

[0002] Centrifugal fans are widely used in ventilation, dust removal and cooling of factories, mines, tunnels, cooling towers, vehicles, ships and buildings. Centrifugal fans are mainly composed of impellers, shafts, casings, collectors (intake ports), exhaust ports, etc. When the impeller rotates, the air between the blades obtains centrifugal force, is thrown out at high speed from the center of the impeller, and is pressed into the volute casing. As the cross-section of the casing gradually increases, the dynamic pressure of the airflow decreases, and the static pressure increases, and finally flows out from the exhaust port of the fan at a higher pressure.

[0003] Traditional centrifugal fans mainly rely on the filter at the air inlet to filter impurities. The filtering accuracy of the filter is relatively low. It is difficult to effectively intercept particles with smaller particle sizes, such as fine dust and smoke particles. Many tiny impurities can easily penetrate the filter and enter the fan. In some industrial environments, such as metal dust generated by metal processing and tiny particulate pollutants in chemical production, these impurities enter the fan and diffuse in the fan casing with the airflow. Due to the lack of an effective active separation mechanism, these dispersed particles will continue to circulate inside the fan, which not only reduces the quality of the exhaust gas, but also causes pollution to the subsequent connected equipment or ventilation system.

[0004] If traditional centrifugal fans want to increase the gas delivery speed, they often need to increase the impeller speed, which will lead to a significant increase in the fan's energy consumption, and also bring more mechanical wear, noise and other problems. Secondly, when the motor works for a long time, it will lead to poor heat dissipation and reduced ventilation effects. As a result, the air volume and air pressure output of the traditional centrifugal fan will drop significantly, affecting the normal use of the equipment. At the same time, the traditional centrifugal fan produces strong vibrations and airflow turbulence due to the direct impact of the intake airflow on the impeller. This high-decibel noise will not only damage the operator's hearing, but also cause hearing loss, tinnitus and other problems.

[0005] Secondly, the adjustment method of traditional centrifugal fans is relatively simple and not precise enough; common adjustment methods such as adjusting the motor speed can change the flow and pressure of the fan to a certain extent, but the adjustment range is limited, and the fan efficiency will drop significantly at low speeds; when using a regulating valve for adjustment, the system resistance will increase, causing additional energy loss, and when traditional centrifugal fans operate under non-design conditions, they cannot effectively adjust their aerodynamic performance to match actual needs, and often deviate from the high-efficiency operating area, resulting in low energy utilization.

[0006] Therefore, it is necessary to provide a centrifugal fan for airflow dust removal to solve the above problems. Summary of the invention

[0007] In view of the deficiencies in the prior art, an object of the present invention is to provide a centrifugal fan for airflow dust removal.

[0008] To achieve the above-mentioned objectives, the present invention provides the following technical solutions: a centrifugal fan for airflow dust removal, comprising a fan housing, an air inlet, an air guide wheel, and an air outlet, wherein the air inlet is arranged at the bottom of the fan housing, the air guide wheel is rotatably connected to the top of the air inlet, and the air guide wheel is driven by a motor on the inner wall of the fan housing, the air outlet is arranged at the outer wall of the fan housing, an energy-saving component for assisting air intake is arranged below the air inlet, a separation component for separating diffuse particles and impurities is arranged inside the fan housing, an increasing speed component for increasing the gas flow rate is arranged outside the fan housing, and an adjusting component for adjusting the gas flow rate is arranged inside the increasing speed component.

[0009] Preferably, the energy-saving component includes a cylindrical block, the cylindrical block is fixedly connected to the bottom of the fan housing, two rows of diverter plates are arranged vertically inside the cylindrical block, and an air inlet groove is opened inside the cylindrical block.

[0010] Preferably, the separation component includes a sealing plate, the sealing plate is fixedly connected to the inner wall of the fan housing, a strip groove is provided on the top of the sealing plate, and a limiting strip group is fixedly connected to the inner wall of the fan housing.

[0011] Preferably, the separation component also includes a discharge trough, which is opened inside the fan housing, and the outer wall of the fan housing is fixedly connected with an arc-shaped collecting block, and the arc-shaped collecting block is arranged on the outside of the discharge trough, and the top of the arc-shaped collecting block is clamped with an arc-shaped sealing block.

[0012] Preferably, the speed increasing assembly includes a first air guide tube, which is fixedly connected to the outside of the fan housing by screws, and the first air guide tube is connected to the air outlet, the end of the first air guide tube away from the fan housing is fixedly connected to the speed increasing tube by screws, the end of the speed increasing tube away from the first air guide tube is fixedly connected to the second air guide tube by screws, and the first air guide tube is connected to the speed increasing tube and the second air guide tube.

[0013] Preferably, the adjustment assembly includes a first positioning ring, which is fixedly connected to the inside of the speed increasing cylinder, and the side of the first positioning ring away from the speed increasing cylinder is fixedly connected to the second positioning ring by screws, and the second positioning ring is fixedly connected to the inside of the speed increasing cylinder, and the top of the first positioning ring is rotatably connected to a transmission gear rod.

[0014] Preferably, the adjustment component also includes a rotating gear rod group, which is distributed in a ring and rotatably connected between the first positioning ring and the second positioning ring. A toothed ring is sleeved on the outer side of the rotating gear rod group, and a toothed block is provided on the outer wall of the toothed ring. An arc-shaped wind-blocking plate is fixedly connected to the outer wall of the rotating gear rod group.

[0015] Preferably, the cylindrical block is arranged below the air inlet, and the two rows of the diverter plates are located at different horizontal heights, and the air inlet groove is connected to the air inlet.

[0016] Preferably, the strip-shaped grooves are opened in an inclined shape, and the limiting strip group is arranged between the fan housing and the sealing plate.

[0017] Preferably, a rotating button is provided at one end of the transmission gear rod away from the first positioning ring, the toothed ring is rotatably connected between the first positioning ring and the second positioning ring, the transmission gear rod is meshed with the toothed block, and the toothed ring is meshed with the rotating gear rod group.

[0018] The centrifugal fan for airflow dust removal provided by the present invention has the following beneficial effects compared with the prior art: 1. Through the setting of the separation component, after the air guide wheel draws the gas into the fan housing in a vortex shape, a large amount of impurities and particles will be diffused inside the fan housing. At the same time, the centrifugal force generated by the air guide wheel will cause the impurities and particles to flow along the outer wall of the sealing plate, and then flow into the sealing plate along the inclined strip grooves, and finally be blocked by the limiting strip group, thereby achieving the purpose of separating the dispersed particles and impurities by the centrifugal force generated by the air guide wheel, and collecting the particles and impurities at the same time. Compared with traditional centrifugal fans relying on simple filters or gravity sedimentation, it has a better separation effect on tiny particles and impurities of different densities, improves the purity of the exhaust gas, and reduces the pollution to subsequent equipment or the environment; Secondly, it prevents the fan from inhaling larger particles of impurities, which may cause the impurities to deposit, wear or corrode on the inner wall of the fan housing, impeller and other key components. For example, if tiny hard particles enter the gap between the impeller and the housing, they will continuously scrape the surface of the impeller and the housing as the fan runs at high speed, causing surface wear of the components and reducing the performance of the fan. This centrifugal separation and collection mechanism can greatly reduce the occurrence of such problems, extend the maintenance cycle and service life of the fan, and reduce the failure rate of the equipment. Secondly, the particles and impurities can be collected by moving the arc-shaped sealing block on the top of the arc-shaped collection block. This integrated collection design makes it easy to clean and recycle impurities. There is no need to set up complex collection devices in multiple locations or frequently clean filters and other components like traditional centrifugal fans. This avoids problems such as increased airflow resistance and fluctuations in air volume and pressure due to impurity accumulation, ensuring that the fan can continuously and stably provide the required ventilation or gas delivery services during long-term operation.

[0019] 2. Through the setting of energy-saving components, the gas entering the cylindrical block along the air inlet groove will be diverted by the diverter plate during the air extraction process of the guide wheel, and the diverted gas will re-merge into the mainstream during the flow process. In the reciprocating process, the purpose of accelerating the gas entering the fan housing is achieved. The diverter plate repeatedly diverts and converges the gas entering the cylindrical block, which is equivalent to adding an additional "acceleration pump" in the air intake link, thereby achieving gas acceleration within a shorter distance; Compared with the traditional centrifugal fan which simply relies on the centrifugal force generated by the rotation of the impeller to accelerate the gas, the split flow acceleration mechanism in the present invention gives the gas additional kinetic energy during the intake stage, so that the gas can enter the fan housing at a higher speed, thereby improving the overall intake efficiency of the fan, reducing the long-term decrease in the air volume and air pressure output of the motor, avoiding the situation that affects the normal use of the equipment, and achieving energy-saving effects to a certain extent; Secondly, since the gas has undergone multiple buffering processes of diversion and convergence in the air inlet groove and the cylindrical block, the impact of the airflow when it enters the fan casing is effectively alleviated. When a traditional centrifugal fan takes in air, the airflow often rushes directly to the impeller, which can easily cause a large impact and local airflow turbulence, and then generate strong noise. The above structure allows the airflow to enter the fan in a relatively more stable and uniform state, reducing the impact of the airflow on the impeller and other components inside the fan. It not only reduces the wear of components caused by impact, but also reduces the noise level during the operation of the fan, improving the working environment. This is especially important for places where noise control is required (such as ventilation equipment near hospitals and residential areas).

[0020] 3. Through the setting of the speed increasing component and the regulating component, when the fan housing discharges the gas into the speed increasing component through the air outlet, the first air guide tube, the speed increasing tube and the second air guide tube form a pipeline with large inner diameters at both ends and small inner diameters in the middle, thereby accelerating the gas flow rate and reducing the static pressure. According to the Bernoulli principle, the airflow will automatically accelerate when passing through this special structure, achieving the effect of speeding up the gas discharged by the fan; Among them, this enables the fan to obtain a higher gas outlet velocity without changing the original working parameters such as the impeller speed, thereby improving the ventilation efficiency and gas delivery capacity of the fan. This is of great significance for some application scenarios that require long-distance gas delivery or high wind speed (such as ventilation duct systems, pneumatic conveying systems, etc.), and can effectively reduce system resistance, reduce energy consumption, and improve the operating performance of the entire system; Secondly, the speed-increasing effect of the Venturi tube effect causes the gas to form a relatively stable high-speed airflow in the speed-increasing component. Compared with the unstable flow states such as turbulence and vortex in the airflow directly discharged by the traditional centrifugal fan, the airflow after the Venturi tube speed-increasing is more uniform and stable. The stable airflow characteristics help to improve the stability and reliability of subsequent gas-related processes. For example, in the air supply system of the burner, the stable high-speed airflow can better mix the fuel and air, achieving more complete and stable combustion. At the same time, due to the arrangement of the transmission gear rod, the tooth ring, the tooth block, the rotating gear rod group and the arc-shaped wind baffle, the inner diameter of the speed increasing cylinder of the Venturi tube can be freely adjusted during the rotation of the transmission gear rod, so as to achieve the characteristics of the flow and pressure of the fan system being able to be flexibly changed. When the arc-shaped wind baffle reduces the inner diameter of the speed increasing cylinder, according to the Venturi effect, the air flow velocity is further accelerated and the pressure is reduced, so that a larger air volume output can be achieved, which is suitable for working conditions that require rapid extraction of a large amount of gas or generation of high negative pressure, such as in industrial vacuum suction systems and rapid ventilation scenes; and when the inner diameter of the speed increasing cylinder is increased, the air flow velocity is relatively slowed down and the pressure is increased, which can meet the applications with high pressure requirements but relatively small flow requirements, such as in the stable air supply system of some precision instruments, which can accurately control the pressure and flow of the gas; Secondly, traditional centrifugal fans can often only adjust flow and pressure by adjusting motor speed or using regulating valves, but these methods will cause the fan to deviate from the high-efficiency zone, resulting in energy waste. The design of the adjustable speed increaser inner diameter can avoid such problems and improve the adaptability and matching degree of the fan to different working conditions. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic diagram of the position relationship of the overall device of the present invention; Figure 2 It is a cross-sectional view of the overall device of the present invention; Figure 3 This is a schematic diagram of the positional relationship among the fan housing, air inlet, air guide wheel, and energy-saving components of the present invention; Figure 4 For the present invention Figure 3 A magnified view of the structure at center; Figure 5 This is a schematic diagram of the positional relationship among the fan housing, air outlet, and separation assembly of the present invention; Figure 6 It is a cross-sectional view of the fan housing, air inlet, and separation assembly of the present invention; Figure 7 For the present invention Figure 6 A magnified view of the structure at B in the middle; Figure 8 This is a schematic diagram of the positional relationship between the fan housing, the speed increasing assembly, and the regulating assembly of the present invention; Fig. 9 For the present invention Figure 8 A magnified view of the structure at C in the middle; Fig.10 This is a schematic diagram of the positional relationship between the speed increasing cylinder and the adjusting assembly of the present invention; Fig.11 This is a schematic diagram of the position relationship of the adjustment components of the present invention; Fig.12 For the present invention Fig.11 A magnified view of the structure at D in the middle; Fig.13 It is an exploded view of the first positioning ring, the second positioning ring, the tooth ring, the tooth block, the rotating gear rod set, and the arc-shaped wind-blocking plate of the present invention.

[0022] Reference numerals: 11, fan housing; 12, air inlet; 13, air guide wheel; 14, air outlet; The energy-saving components include: 21, a cylindrical block; 22, a diverter plate; 23, an air inlet groove; The separation assembly includes: 31, sealing plate; 32, strip groove; 33, limiting strip group; 34, discharge groove; 35, arc-shaped collecting block; 36, arc-shaped sealing block; The speed increasing assembly includes: 41, a first air guide tube; 42, a speed increasing tube; 43, a second air guide tube; The adjustment component includes: 51, a first positioning ring; 52, a second positioning ring; 53, a transmission gear rod; 54, a tooth ring; 55, a tooth block; 56, a rotating gear rod group; 57, an arc-shaped wind blocking piece. DETAILED DESCRIPTION

[0023] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0024] In the description of the present invention, the terms "center", "lateral", "up", "down", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, they should not be understood as limitations on the present invention.

[0025] The specific implementation of the present invention is described in detail below in conjunction with specific embodiments.

[0026] Implementation example Figures 1 to 13 As shown, a centrifugal fan for airflow dust removal provided by an embodiment of the present invention includes a fan housing 11, an air inlet 12, an air guide wheel 13, and an air outlet 14. The air inlet 12 is opened at the bottom of the fan housing 11, the air guide wheel 13 is rotatably connected to the top of the air inlet 12, and the air guide wheel 13 is driven by a motor on the inner wall of the fan housing 11, the air outlet 14 is opened on the outer wall of the fan housing 11, an energy-saving component for assisting air intake is arranged below the air inlet 12, a separation component for separating diffuse particles and impurities is arranged inside the fan housing 11, an increasing speed component for increasing the gas flow rate is arranged on the outside of the fan housing 11, and an adjusting component for adjusting the gas flow rate is arranged inside the increasing speed component.

[0027] The energy-saving component includes a cylindrical block 21 , which is fixedly connected to the bottom of the fan housing 11 , and has two rows of splitter plates 22 arranged vertically inside the cylindrical block 21 , and an air inlet groove 23 opened inside the cylindrical block 21 .

[0028] The separation assembly includes a sealing plate 31 , which is fixedly connected to the inner wall of the fan housing 11 . A strip groove 32 is formed on the top of the sealing plate 31 . A limiting strip group 33 is fixedly connected to the inner wall of the fan housing 11 .

[0029] The separation component also includes a discharge trough 34, which is opened inside the fan housing 11. The outer wall of the fan housing 11 is fixedly connected with an arc-shaped collecting block 35, and the arc-shaped collecting block 35 is arranged on the outside of the discharge trough 34. The top of the arc-shaped collecting block 35 is clamped with an arc-shaped sealing block 36.

[0030] The speed increasing assembly includes a first air guide tube 41, which is fixedly connected to the outside of the fan housing 11 by screws, and the first air guide tube 41 is connected to the air outlet 14, one end of the first air guide tube 41 away from the fan housing 11 is fixedly connected to the speed increasing tube 42 by screws, and one end of the speed increasing tube 42 away from the first air guide tube 41 is fixedly connected to the second air guide tube 43 by screws, and the first air guide tube 41 is connected to the speed increasing tube 42 and the second air guide tube 43.

[0031] The adjustment assembly includes a first positioning ring 51, which is fixedly connected to the inside of the speed increasing cylinder 42. The side of the first positioning ring 51 away from the speed increasing cylinder 42 is fixedly connected to the second positioning ring 52 by screws, and the second positioning ring 52 is fixedly connected to the inside of the speed increasing cylinder 42. The top of the first positioning ring 51 is rotatably connected to a transmission gear rod 53.

[0032] The adjustment component also includes a rotating gear rod group 56, which is distributed in a ring shape and rotatably connected between the first positioning ring 51 and the second positioning ring 52. A toothed ring 54 is sleeved on the outer side of the rotating gear rod group 56, and a toothed block 55 is provided on the outer wall of the toothed ring 54. An arc-shaped wind-blocking plate 57 is fixedly connected to the outer wall of the rotating gear rod group 56.

[0033] The cylindrical block 21 is arranged below the air inlet 12 , and the two rows of diverter plates 22 are located at different horizontal heights to accelerate the flow of air. The air inlet slot 23 is connected to the air inlet 12 , so that the air inlet 12 can be exhausted through the air inlet slot 23 .

[0034] The strip grooves 32 are opened in an inclined shape to facilitate the diffuse particles to flow into the sealing plate 31, and the limiting strip group 33 is arranged between the fan housing 11 and the sealing plate 31 to facilitate the collection of diffuse particles and impurities.

[0035] A rotating button is provided at one end of the transmission gear rod 53 away from the first positioning ring 51, so that the transmission gear rod 53 can be rotated synchronously when the staff turns the rotating button. The toothed ring 54 is rotatably connected between the first positioning ring 51 and the second positioning ring 52. The transmission gear rod 53 is meshed with the toothed block 55, so that the transmission gear rod 53 can move the toothed block 55 to rotate, and the toothed ring 54 is meshed with the rotating gear rod group 56, so that the toothed ring 54 can drive the rotating gear rod group 56 to rotate.

[0036] Working principle: When the staff starts the air guide wheel 13 to rotate through the motor inside the fan housing 11, the air guide wheel 13 will draw air through the air inlet slot 23 below the air inlet 12; In the process of exhausting air through the guide wheel 13, the cylindrical block 21 is arranged below the air inlet 12, and the two rows of diverter plates 22 are located at different horizontal heights. At the same time, the air inlet slot 23 is connected to the air inlet 12, so that the gas first enters the cylindrical block 21 along the air inlet slot 23, and the gas inside the cylindrical block 21 is diverted by the two rows of diverter plates 22. During the flow of the gas, the diverted gas is re-merged into the mainstream, and in the reciprocating process, the purpose of accelerating the gas to enter the fan housing 11 is achieved. The gas is accelerated to a certain extent within a shorter distance. Compared with the traditional centrifugal fan which simply relies on the centrifugal force generated by the rotation of the impeller to accelerate the gas, the diversion acceleration mechanism in the present invention gives the gas additional kinetic energy during the intake stage, so that the gas can enter the fan housing 11 at a higher speed, thereby improving the overall intake efficiency of the fan, reducing the long-term decline in the motor's air volume and air pressure output, avoiding the situation that affects the normal use of the equipment, and achieving energy-saving effects to a certain extent. At the same time, the airflow enters the fan in a relatively more stable and uniform state, reducing the impact of the airflow on the impeller and other components inside the fan, which not only reduces the wear of components caused by the impact, but also reduces the noise level during the operation of the fan.

[0037] After the air guide wheel 13 draws the gas into the fan housing 11, the gas will flow along the inside of the fan housing 11 in a vortex shape. During this process, a large amount of impurities and particles will be diffused in the fan housing 11. The centrifugal force generated by the air guide wheel 13 will cause the impurities and particles to flow along the outer wall of the sealing plate 31. Since the strip grooves 32 are opened in an inclined shape, the impurities and particles will then flow into the sealing plate 31 along the inclined strip grooves 32, and finally be blocked by the limiting strip group 33. Finally, the diffused particles and impurities will naturally fall into the discharge trough 34 due to gravity. The centrifugal force generated by the air guide wheel 13 is used to separate the dispersed particles and impurities, and the particles and impurities are collected at the same time. Compared with the traditional centrifugal fan that relies on a simple filter or gravity sedimentation, it has a better separation effect on tiny particles and impurities of different densities, improves the purity of the exhaust gas, and reduces the pollution to subsequent equipment or the environment. Secondly, when the fan housing 11 stops driving the air guide wheel 13, the staff can pull out the arc-shaped sealing block 36 away from the arc-shaped collecting block 35, and then clean the diffuse particles and impurities inside the arc-shaped collecting block 35 and the discharge trough 34. This integrated collection design makes it convenient to clean and recycle impurities. There is no need to set up complex collection devices in multiple locations or frequently clean components such as filters like traditional centrifugal fans, which avoids problems such as increased airflow resistance and fluctuations in air volume and pressure due to impurity accumulation, ensuring that the fan can continuously and stably provide the required ventilation or gas delivery services during long-term operation.

[0038] After the air drawn into the air guide wheel 13 is screened by centrifugal force, the air guide wheel 13 will discharge the inside of the fan housing 11 along the air outlet 14. Since the first air guide tube 41 is connected to the air outlet 14, and the first air guide tube 41 is connected to the speed increasing tube 42 and the second air guide tube 43, the air will be discharged in sequence along the air outlet 14, the first air guide tube 41, the speed increasing tube 42 and the second air guide tube 43; The first air guide tube 41, the speed increasing tube 42 and the second air guide tube 43 form a pipeline with large inner diameters at both ends and a small inner diameter in the middle, thereby accelerating the gas flow rate and reducing the static pressure. According to the Bernoulli principle, the air flow will automatically accelerate when passing through this special structure, achieving the effect of increasing the speed of the gas discharged by the fan. At the same time, the fan can obtain a higher gas outlet speed without changing the original working parameters such as the rotation speed of the air guide wheel 13, thereby improving the ventilation efficiency and gas delivery capacity of the fan, effectively reducing system resistance, reducing energy consumption, and improving the operating performance of the entire system. Secondly, the speed-increasing effect produced by the Venturi tube effect causes the gas to form a relatively stable high-speed airflow in the speed-increasing component. Compared with the unstable flow states such as turbulence and vortex in the airflow directly discharged from the traditional centrifugal fan, the airflow after the Venturi tube speed increase is more uniform and stable. The stable airflow characteristics help to improve the stability and reliability of subsequent gas-related process; for example, in the air supply system of the burner, the stable high-speed airflow can better mix the fuel and air to achieve more complete and stable combustion.

[0039] Secondly, a rotating knob is provided at one end of the transmission gear rod 53 away from the first positioning ring 51, so that the staff can adjust the inner diameter of the speed increasing cylinder 42 by rotating the transmission gear rod 53 at the top of the first positioning ring 51; When the staff rotates the transmission gear rod 53, the transmission gear rod 53 is meshed with the tooth block 55, and the tooth ring 54 is meshed with the rotating gear rod set 56, so that the transmission gear rod 53 will turn the tooth block 55 to rotate, and then the tooth block 55 drives the tooth ring 54 to rotate, and the tooth ring 54 will turn the arc-shaped wind-blocking piece 57 through the rotating gear rod set 56 to rotate, so that the arc-shaped wind-blocking piece 57 continuously reduces the inner diameter of the speed-increasing cylinder 42, and then according to the Venturi effect, the air flow speed is further accelerated, the pressure is reduced, and a larger air volume output can be achieved, which is suitable for working conditions that require rapid extraction of a large amount of gas or generation of high negative pressure, such as in industrial vacuum suction systems and rapid ventilation scenes; On the contrary, when the staff rotates the transmission gear rod 53 in the opposite direction, the transmission gear rod 53 rotates the gear ring 54 through the gear block 55, and the gear ring 54 rotates the arc-shaped wind-blocking piece 57 through the rotating gear rod group 56, so that the arc-shaped wind-blocking piece 57 continuously increases the inner diameter of the speed-increasing cylinder 42, and then the air flow speed is relatively slowed down and the pressure is increased, which can meet the applications with high pressure requirements but relatively small flow requirements, such as in the stable air supply system of some precision instruments, and can accurately control the pressure and flow of the gas; The inner diameter of the speed increasing cylinder 42 can be freely adjusted, so that the flow rate and pressure of the fan system can be flexibly changed, and the adaptability and matching degree of the fan to different working conditions are improved.

[0040] For those skilled in the art, although several embodiments and examples of the present invention are described, these embodiments and examples are presented as examples and are not intended to limit the scope of the invention. These new embodiments can be implemented in various other ways, and various omissions, substitutions, and changes can be made without departing from the scope of the subject matter of the invention. These embodiments and their variations are included in the scope and subject matter of the invention, and are included in the invention described in the claims and the scope of their equivalents.

[0041] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A centrifugal fan for airflow dust removal, comprising a fan housing (11), an air inlet (12), an air guide wheel (13), and an air outlet (14), wherein the air inlet (12) is provided at the bottom of the fan housing (11), the air guide wheel (13) is rotatably connected to the top of the air inlet (12), and the air guide wheel (13) is driven by a motor on the inner wall of the fan housing (11), and the air outlet (14) is provided on the outer wall of the fan housing (11), characterized in that: An energy-saving component for assisting air intake is arranged below the air inlet (12), a separation component for separating diffuse particles and impurities is arranged inside the fan housing (11), a speed-increasing component for increasing the gas flow rate is arranged outside the fan housing (11), and a regulating component for regulating the gas flow rate is arranged inside the speed-increasing component.

2. A centrifugal fan for airflow dust removal according to claim 1, characterized in that: The energy-saving component comprises a cylindrical block (21), the cylindrical block (21) being fixedly connected to the bottom of the fan housing (11), the interior of the cylindrical block (21) having two rows of flow dividers (22) arranged vertically, and the interior of the cylindrical block (21) having an air intake groove (23).

3. The centrifugal fan for airflow dust removal according to claim 1, characterized in that: The separation component comprises a sealing plate (31), the sealing plate (31) being fixedly connected to the inner wall of the fan housing (11), a strip-shaped groove (32) being provided on the top of the sealing plate (31), and a limiting strip group (33) being fixedly connected to the inner wall of the fan housing (11).

4. A centrifugal fan for airflow dust removal according to claim 3, characterized in that: The separation assembly further comprises a discharge trough (34), the discharge trough (34) being arranged inside the fan housing (11), an arc-shaped collecting block (35) being fixedly connected to the outer wall of the fan housing (11), and the arc-shaped collecting block (35) being arranged outside the discharge trough (34), and an arc-shaped sealing block (36) being clamped on the top of the arc-shaped collecting block (35).

5. The centrifugal fan for airflow dust removal according to claim 1, characterized in that: The speed increasing assembly comprises a first air guide tube (41), the first air guide tube (41) being fixedly connected to the outside of the fan housing (11) by means of screws, and the first air guide tube (41) being connected to the air outlet (14), one end of the first air guide tube (41) away from the fan housing (11) being fixedly connected to the speed increasing tube (42) by means of screws, one end of the speed increasing tube (42) away from the first air guide tube (41) being fixedly connected to the second air guide tube (43) by means of screws, and the first air guide tube (41) being connected to the speed increasing tube (42) and the second air guide tube (43).

6. A centrifugal fan for airflow dust removal according to claim 5, characterized in that: The adjustment assembly comprises a first positioning ring (51), the first positioning ring (51) being fixedly connected to the interior of the speed increasing cylinder (42), a side of the first positioning ring (51) away from the speed increasing cylinder (42) being fixedly connected to a second positioning ring (52) via screws, and the second positioning ring (52) being fixedly connected to the interior of the speed increasing cylinder (42), and a transmission gear rod (53) being rotatably connected to the top of the first positioning ring (51).

7. A centrifugal fan for airflow dust removal according to claim 6, characterized in that: The adjustment assembly further comprises a rotating gear rod group (56), the rotating gear rod group (56) being distributed in an annular shape and rotatably connected between the first positioning ring (51) and the second positioning ring (52), a toothed ring (54) being sleeved on the outer side of the rotating gear rod group (56), a toothed block (55) being provided on the outer wall of the toothed ring (54), and an arc-shaped wind-blocking sheet (57) being fixedly connected to the outer wall of the rotating gear rod group (56).

8. The centrifugal fan for airflow dust removal according to claim 2, characterized in that: The cylindrical block (21) is arranged below the air inlet (12), and the two rows of the diverter plates (22) are located at different horizontal heights. The air inlet groove (23) is connected to the air inlet (12).

9. The centrifugal fan for airflow dust removal according to claim 3, characterized in that: The strip-shaped groove (32) is opened in an inclined shape, and the limiting strip group (33) is arranged between the fan housing (11) and the sealing plate (31).

10. The centrifugal fan for airflow dust removal according to claim 7, characterized in that: A rotating knob is provided at one end of the transmission gear rod (53) away from the first positioning ring (51); the toothed ring (54) is rotatably connected between the first positioning ring (51) and the second positioning ring (52); the transmission gear rod (53) is meshed with the toothed block (55); and the toothed ring (54) is meshed with the rotating gear rod set (56).

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