Magnetic suspension fan with noise reduction device

Abstract

The magnetic suspension fan with the noise reduction device is applied to the field of non-variable-capacity pumps, dust in inlet air is adsorbed through a rectangular box filled with water, so that noise generated when airflow makes contact with an impeller and a volute is reduced, meanwhile, corrosion of the dust to the impeller is reduced, and the service life of the impeller is prolonged. The problems of tedious maintenance and high energy consumption of a noise reduction and dust removal device in the prior art are solved. Besides, the noise can be integrally isolated through the liftable soundproof cover on the premise that disassembly and maintenance of equipment are not affected, an inner cavity of the soundproof cover is divided into two cavities with the ends communicated through a bearing plate provided with a sealing strip, the length of a path for transmitting noise sound waves to the external environment is increased, the inner cavity of the soundproof cover is used for fully consuming sound wave energy, and the noise reduction effect is achieved. The noise reduction effect is improved; in addition, through a sound absorption cover and a horizontal sound absorption plate which are arranged on the outer side of the air inlet pipe and a vertical sound absorption plate arranged on one side of the rectangular gap, noise sound waves are absorbed in a multi-angle mode, and the noise reduction effect is further improved.

Description

Technical Field

[0001] This invention relates to the field of non-variable displacement pumps, and particularly to a magnetic levitation fan with a noise reduction device. Background Technology

[0002] In existing technologies, fans using magnetic levitation motors effectively reduce noise generated by mechanical friction due to their non-mechanical contact characteristics. Their operating noise mainly originates from aerodynamic noise, namely turbulent noise generated by the interaction between airflow and the volute and impeller surfaces. However, in practical applications, when the gas transported by the fan contains dust particles, it will cause additional noise problems.

[0003] To address this issue, pre-dust removal using filters is typically employed. However, this approach presents inherent challenges: while high-precision filters (i.e., smaller pore sizes) can meet dust removal requirements, they significantly increase system ventilation resistance, limit airflow, and cause filter clogging, necessitating frequent maintenance and replacement. Conversely, low-precision filters (i.e., larger pore sizes) can reduce ventilation resistance and maintenance frequency, but allow a large amount of dust to penetrate the filter and enter the fan's flow path. This dust, carried by high-speed airflow, intensifies impacts and turbulence on components such as the impeller and volute, resulting in greater aerodynamic noise.

[0004] A patent application with publication number CN108252965A discloses an air intake filter device for a magnetic levitation blower with noise reduction function. By installing an air intake filter device containing multi-stage filter modules on the air intake side plate of the skid-mounted cabinet of the magnetic levitation blower, when the device takes in air, the air first passes through a baffle to block foreign objects such as willow catkins, which are then easily cleaned by a brush; then, a high-voltage ionization plate and electrostatic adsorption and noise reduction components efficiently adsorb dust and reduce noise; finally, the air is deeply filtered by coarse and fine filters, achieving effective interception of foreign objects, deep purification of dust, and noise reduction during operation, and the filter element does not need to be replaced frequently.

[0005] The existing patent with publication number CN223306024U discloses a noise reduction and sealing device for a magnetic levitation blower. By setting a sealed shell inside the cabinet and installing a magnetic levitation blower and several sealing plates inside the sealed shell, multiple sealed spaces are formed. At the same time, an air intake and silencing structure containing a first noise reduction plate, a corresponding second noise reduction plate, and a silencing channel is assembled on the sealed shell, so that the gas enters through the "non"-shaped air intake channel, effectively blocking high-speed gas from entering the motor, and achieving a significant improvement in the noise reduction effect during the operation of the magnetic levitation blower.

[0006] The aforementioned prior art discloses a technical solution for multi-stage filtration using a screen and electrostatic adsorption plate, and also discloses a technical solution for improving noise reduction by using multiple sealing plates to form multiple sound-absorbing structures. However, the prior art still has shortcomings. Traditional dust filtration methods rely on filter screens or electrostatic adsorption devices, which require frequent maintenance or consume more electrical energy. Summary of the Invention

[0007] The core of this invention lies in solving the problems of frequent maintenance and increased energy consumption of existing noise reduction and dust removal devices by using a dust removal mechanism filled with water. At the same time, the kinetic energy of noise waves is fully consumed and noise is actively absorbed by the support plate and sound-absorbing cover, further reducing working noise.

[0008] To solve the above problems, the present invention adopts the following technical solution.

[0009] A magnetic levitation fan with a noise reduction device includes a base, a soundproof cover snapped onto the upper end of the base, a sealing ring fixedly connected to the snap-fit ​​between the base and the soundproof cover, a support plate provided inside the soundproof cover, a rectangular gap for airflow formed between the support plate and one inner wall of the soundproof cover, and the lower end of the support plate fixedly connected to the base via multiple support rods; a magnetic levitation motor is fixedly connected to the support plate, a volute is fixedly connected to the housing of the magnetic levitation motor, an impeller fixedly connected to the output end of the magnetic levitation motor is provided inside the volute, an air inlet pipe is fixedly connected to the front end of the volute, and an exhaust pipe is fixedly connected to the upper end of the volute;

[0010] A dust removal mechanism is provided below the support plate. The dust removal mechanism includes a rectangular box fixedly connected to the base. A U-shaped cavity is opened inside the rectangular box. An air intake hood is fixedly connected to the right end of the rectangular box. The air intake hood communicates with the right end of the U-shaped cavity. A sealing ring 2 is fixedly connected to the right end of the air intake hood. The sealing ring 2 abuts against the inner wall of the sound insulation cover. A grid plate is fixedly connected to the position on the sound insulation cover where it abuts against the sealing ring 2. External air enters the air intake hood through the grid plate. A demister is fixedly connected to the inner wall of the left side of the U-shaped cavity. An exhaust hole communicating with the U-shaped cavity is opened on the left side wall of the rectangular box. The middle part of the U-shaped cavity is a rectangular cavity. Multiple linearly equidistant guide strips are fixedly connected to the top wall of the rectangular cavity. The rectangular cavity is filled with water to absorb dust. The water level is lower than the lower end of the guide strips.

[0011] Furthermore, the U-shaped cavity is fixedly connected to the outlet of a water pump via a pipe, the pump housing is fixedly connected to the base, and the pump inlet is connected to an external water source; a drain pipe is fixedly connected to the lower end of the rectangular box, the drain pipe passes through the base, and a solenoid valve is fixedly connected to the drain pipe; an infrared liquid level sensor is fixedly connected to the inner wall of the U-shaped cavity, and the water pump, solenoid valve, and infrared liquid level sensor are all electrically connected to the same controller (not shown in the figure).

[0012] Furthermore, the soundproof cover is a hollow box structure with an opening at the bottom. A vertical protruding ring is fixedly connected to the base, and a sealing ring is fixed to the inner wall of the vertical protruding ring. A horizontal protruding ring is fixedly connected to the bottom of the soundproof cover, and the lower end face of the horizontal protruding ring abuts against the upper end face of the sealing ring.

[0013] Furthermore, the soundproof enclosure is made of either steel plate or lead plate, and the sealing rings one and two are made of rubber material.

[0014] Furthermore, the soundproof enclosure is connected to a lifting mechanism that drives it to move up and down. The lifting mechanism includes a slider that is fixedly connected to the outer wall of the soundproof enclosure. The slider is slidably connected to a slide rail frame. The lower end of the slide rail frame is fixedly connected to the base. A lead screw is rotatably connected inside the slide rail frame. The lead screw is threadedly connected to the slider. A worm gear is fixedly connected to the lower part of the lead screw. The worm gear meshes with a worm. The worm extends to the outside of the slide rail frame and is fixedly connected to a hand crank. The worm is rotatably connected to the slide rail frame.

[0015] Furthermore, a flange 1 is provided at the end of the exhaust pipe away from the volute. The flange 1 abuts against the inner wall of the soundproof cover, and a sealing ring 3 is fixed at the abutment. A through hole communicating with the exhaust pipe is provided on the outer wall of the soundproof cover. An external pipe is provided outside the through hole and fixedly connected to the soundproof cover. A flange 2 is provided at the abutment between the external pipe and the outer wall of the soundproof cover. The flange 1 and flange 2 are connected by fastening bolts. An air intake groove for fixing the grille plate is provided on the soundproof cover. Multiple rectangular through slots are provided on the grille plate.

[0016] Furthermore, a cylinder that penetrates the bearing plate is slidably sleeved on the upper end of the support rod. The cylinder and the bearing plate are integrally formed. A fixing bolt that penetrates the bearing plate is provided inside the cylinder. The lower end of the fixing bolt is threaded to the upper end of the support rod. Both the upper and lower ends of the bearing plate are abutted by rubber rings fitted on the fixing bolts. The upper end of the upper rubber ring abuts against the bolt head of the fixing bolt, and the lower end of the lower rubber ring abuts against the upper end of the support rod.

[0017] Furthermore, a sealing strip is fixedly connected to the circumferential side wall of the bearing plate, the outer wall of the sealing strip abuts against the inner wall of the soundproof cover, and the sealing strip has a U-shaped structure.

[0018] Furthermore, a sound-absorbing hood is fixedly connected to the inner wall of the soundproof cover above the air intake pipe, and a horizontal sound-absorbing plate fixedly connected to the support plate is abutted at the lower end of the sound-absorbing hood. The horizontal sound-absorbing plate and the sound-absorbing hood together form a rectangular cover with one end open.

[0019] Furthermore, a vertical sound-absorbing plate is fixedly connected to the inner wall of the soundproof cover on the side opposite to the sound-absorbing cover, and the vertical sound-absorbing plate completely covers the inner wall of the soundproof cover on that side.

[0020] Compared with the prior art, the advantages of this invention are:

[0021] (1) The present invention uses a rectangular box filled with water to adsorb dust in the air, reducing the amount of dust entering the volute, thereby reducing the noise generated when the air comes into contact with the impeller and the volute, and reducing the corrosion of the impeller by dust. This achieves noise reduction while improving the life of the fan components, and solves the problem that conventional filters in the prior art cannot take into account both air intake and dust removal effect. In addition, the U-shaped cavity and guide strip set in the rectangular box allow the airflow to enter the U-shaped cavity and come into contact with the liquid surface of the water multiple times under the action of the guide strip, improving the adsorption effect of water on dust. Furthermore, the soundproof cover provides overall sound insulation, further improving the noise reduction effect.

[0022] (2) The present invention uses a liftable soundproof cover to isolate noise as a whole without affecting the disassembly and maintenance of the equipment. The inner cavity of the soundproof cover is divided into two cavities connected at both ends by a support plate with a sealing strip installed, which increases the path length of the noise sound wave to the external environment and makes full use of the inner cavity of the soundproof cover to consume the sound wave energy, thereby improving the noise reduction effect. In addition, the sound-absorbing cover and horizontal sound-absorbing plate set on the outside of the air intake pipe, as well as the vertical sound-absorbing plate set on one side of the rectangular gap, absorb the noise sound wave from multiple angles, thereby further improving the noise reduction effect. Attached Figure Description

[0023] Figure 1 This is a perspective three-dimensional structural diagram of the present invention from the front view.

[0024] Figure 2 This is a three-dimensional structural diagram of the invention from a rear view.

[0025] Figure 3 This is a cross-sectional structural diagram of the present invention;

[0026] Figure 4 This is a schematic diagram of the exploded assembly structure of the present invention;

[0027] Figure 5 for Figure 3 Enlarged structural diagram at point A;

[0028] Figure 6 This is a cross-sectional exploded view of the dust removal mechanism in this invention;

[0029] Figure 7 for Figure 3 Enlarged structural diagram at point B;

[0030] Figure 8 This is an exploded structural diagram of the lifting mechanism in this invention;

[0031] Figure 9 This is a schematic diagram of airflow within the device in this invention;

[0032] Figure 10This is a cross-sectional view of the support rod and bearing plate in this invention;

[0033] Figure 11 This is a schematic diagram of the assembly structure of the sealing strip and the sound-absorbing cover in this invention;

[0034] Figure 12 for Figure 3 A magnified structural diagram at point C.

[0035] Explanation of the labels in the diagram:

[0036] 1. Base; 101. Vertical raised ring; 2. Soundproof cover; 201. Air inlet slot; 202. Horizontal raised ring; 3. Sealing ring one; 4. Lifting mechanism; 5. Support plate; 6. Support rod; 7. Magnetic levitation motor; 8. Volute housing; 9. Air inlet pipe; 10. Exhaust pipe; 11. Dust removal mechanism; 12. Rectangular box; 1201. U-shaped cavity; 1202. Exhaust port; 1203. Guide strip; 13. Air inlet cover; 14. Sealing ring two; 5. Grating plate; 16. Water pump; 17. Drain pipe; 18. Solenoid valve; 19. Infrared liquid level sensor; 20. Demister; 21. Slider; 22. Slide rail frame; 23. Lead screw; 24. Worm gear; 25. Worm; 26. Hand crank; 27. Sealing strip; 28. Cylinder; 29. ​​Fixing bolt; 30. Rubber ring; 31. Sound-absorbing cover; 32. Horizontal sound-absorbing plate; 33. Vertical sound-absorbing plate; 34. Silencer; 35. External pipe. Detailed Implementation

[0037] The technical solutions will now be clearly and completely described with reference to the accompanying drawings in the embodiments of the present invention.

[0038] First implementation method

[0039] Please see Figures 1-9 In one embodiment of the present invention, a magnetic levitation fan with a noise reduction device includes a base 1, a soundproof cover 2 is snapped onto the upper end of the base 1, a sealing ring 3 is fixedly connected at the snap-fit ​​between the base 1 and the soundproof cover 2, a support plate 5 is provided inside the soundproof cover 2, a rectangular gap for airflow is formed between the support plate 5 and the inner wall of one side of the soundproof cover 2, and the lower end of the support plate 5 is fixedly connected to the base 1 through multiple support rods 6; a magnetic levitation motor 7 is fixedly connected to the support plate 5, a volute 8 is fixedly connected to the housing of the magnetic levitation motor 7, an impeller fixedly connected to the output end of the magnetic levitation motor 7 is provided inside the volute 8, an air inlet pipe 9 is fixedly connected to the front end of the volute 8, and an exhaust pipe 10 is fixedly connected to the upper end of the volute 8;

[0040] Please see Figure 3 , Figure 5 and Figure 6A dust removal mechanism 11 is provided below the support plate 5. The dust removal mechanism 11 includes a rectangular box 12 fixedly connected to the base 1. A U-shaped cavity 1201 is opened inside the rectangular box 12. An air intake hood 13 is fixedly connected to the right end of the rectangular box 12. The air intake hood 13 communicates with the right end of the U-shaped cavity 1201. A sealing ring 2 14 is fixedly connected to the right end of the air intake hood 13. The sealing ring 2 14 abuts against the inner wall of the sound insulation cover 2. A grid plate 15 is fixedly connected to the position on the sound insulation cover 2 where it abuts against the sealing ring 2 14. External air enters the air intake hood 13 through the grid plate 15.

[0041] Please see Figure 6 A demister 20 is fixedly connected to the inner left side of the U-shaped cavity 1201. An exhaust port 1202 communicating with the U-shaped cavity 1201 is opened on the left side wall of the rectangular box 12. The middle part of the U-shaped cavity 1201 is a rectangular cavity. Multiple linearly equidistant guide strips 1203 are fixedly connected to the top wall of the rectangular cavity. The rectangular cavity is filled with water for adsorbing dust. The water level is lower than the lower end of the guide strips 1203. When the outside air enters the rectangular cavity, it comes into contact with the water surface under the action of the guide strips 1203, so that the dust is adsorbed by the water.

[0042] For details, please refer to Figure 9 When the magnetic levitation motor 7 is started, external air enters the air intake hood 13 through the grille plate 15, and then is injected into the U-shaped cavity 1201. In the middle of the U-shaped cavity 1201, the air comes into contact with the water surface to remove dust from the air. Then the dust-removed air enters the demister 20 to remove the mist droplets in the air. The dehumidified air then enters the sound insulation cover 2 through the exhaust port 1202. The dust-removed and dehumidified air is discharged from the rectangular box 12, enters the cavity above the support plate 5 through the rectangular gap, and then enters the volute 8 through the air intake pipe 9. Finally, it is discharged from the exhaust pipe 10.

[0043] Compared to traditional magnetic levitation fans, this invention uses a rectangular box 12 filled with water to adsorb dust from the air, reducing the amount of dust entering the volute 8. This reduces noise generated when air comes into contact with the impeller and volute 8, reduces dust corrosion of the impeller, and achieves noise reduction while extending the lifespan of fan components. Using water to adsorb dust instead of a filter to intercept it still provides good dust removal even with high airflow, solving the problem that conventional filters cannot simultaneously handle both airflow and dust removal efficiency. Furthermore, the U-shaped cavity 1201 and guide strip 1203 within the rectangular box 12 allow airflow to repeatedly contact the water surface under the guidance of the guide strip 1203, improving the water's adsorption of dust and thus enhancing dust removal efficiency. In addition, the soundproof cover 2 provides overall sound insulation, further improving noise reduction.

[0044] Please see Figure 3 and Figure 6 The U-shaped cavity 1201 is fixedly connected to the outlet of the water pump 16 through a pipe. The housing of the water pump 16 is fixedly connected to the base 1, and the inlet of the water pump 16 is connected to an external water source. The lower end of the rectangular box 12 is fixedly connected to a drain pipe 17, which passes through the base 1. A solenoid valve 18 is fixedly connected to the drain pipe 17. An infrared liquid level sensor 19 is fixedly connected to the inner wall of the U-shaped cavity 1201. The water pump 16, the solenoid valve 18, and the infrared liquid level sensor 19 are all electrically connected to the same controller (not shown in the figure).

[0045] Specifically, the water level in the U-shaped cavity 1201 is monitored in real time by an infrared liquid level sensor 19, and automatic water replenishment and drainage are achieved through the cooperation of a water pump 16 and a solenoid valve 18.

[0046] Please see Figure 3 and Figure 4 The soundproof cover 2 is a hollow box structure with an opening at the bottom. A vertical protrusion ring 101 is fixedly connected to the base 1. A sealing ring 3 is fixed on the inner wall of the vertical protrusion ring 101. A horizontal protrusion ring 202 is fixedly connected to the lower end of the soundproof cover 2. The lower end face of the horizontal protrusion ring 202 abuts against the upper end face of the sealing ring 3.

[0047] Specifically, the combination of the vertical protruding ring 101, the horizontal protruding ring 202, and the sealing ring 3 improves the sealing effect at the joint between the soundproof cover 2 and the base 1, reducing the probability of noise radiating from the joint to the external environment.

[0048] In this embodiment, the soundproof cover 2 is made of either steel plate or lead plate, and the sealing ring 3 and sealing ring 14 are made of rubber material.

[0049] Please see Figure 3 , Figure 7 and Figure 8 The soundproof cover 2 is connected to a lifting mechanism 4 that drives it to move up and down. The lifting mechanism 4 includes a slider 21 that is fixedly connected to the outer wall of the soundproof cover 2. The slider 21 is slidably connected to a slide rail frame 22. The lower end of the slide rail frame 22 is fixedly connected to the base 1. A lead screw 23 is rotatably connected inside the slide rail frame 22. The lead screw 23 is threadedly connected to the slider 21. A worm gear 24 is fixedly connected to the lower part of the lead screw 23. The worm gear 24 meshes with a worm 25. The worm 25 extends to the outside of the slide rail frame 22 and is fixedly connected to a hand crank 26. The worm 25 is rotatably connected to the slide rail frame 22.

[0050] Specifically, by turning the hand crank 26, the worm gear 25 drives the worm wheel 24 to rotate, the worm wheel 24 drives the lead screw 23 to rotate, the lead screw 23 drives the slider 21 to move vertically along the slide frame 22, and the slider 21 drives the soundproof cover 2 to move up and down, so as to realize the quick disassembly and installation of the soundproof cover 2, thereby facilitating the maintenance of the equipment inside the soundproof cover 2.

[0051] Please see Figure 2 and Figure 3 The exhaust pipe 10 has a flange 1 at the end away from the volute 8. The flange 1 abuts against the inner wall of the soundproof cover 2 and a sealing ring 3 (not shown in the figure) is fixed at the abutment. The outer wall of the soundproof cover 2 has a through hole that communicates with the exhaust pipe 10. An outer pipe 35 that is fixedly connected to the soundproof cover 2 is provided outside the through hole. A flange 2 is provided at the abutment between the outer pipe 35 and the outer wall of the soundproof cover 2. The flange 1 and the flange 2 are connected by fastening bolts. The soundproof cover 2 has an air intake groove 201 for fixing the grille plate 15. The grille plate 15 has multiple rectangular through grooves.

[0052] Specifically, before raising or lowering the soundproof cover 2, the outer connecting pipe 35 is removed by tightening the bolts.

[0053] Second implementation method

[0054] Based on the first implementation, please refer to Figure 3 , Figure 9 , Figure 10 , Figure 11 and Figure 12 The upper end of the support rod 6 is slidably sleeved with a cylinder 28 that penetrates the bearing plate 5. The cylinder 28 and the bearing plate 5 are integrally formed. The cylinder 28 is provided with a fixing bolt 29 that penetrates the bearing plate 5. The lower end of the fixing bolt 29 is threadedly connected to the upper end of the support rod 6. The upper and lower ends of the bearing plate 5 are both abutted by rubber rings 30 that are sleeved on the fixing bolts 29. The upper end of the upper rubber ring 30 abuts against the bolt head of the fixing bolt 29, and the lower end of the lower rubber ring 30 abuts against the upper end of the support rod 6. The lower end of the support rod 6 is fixedly connected to the upper end of the base 1.

[0055] Specifically, when the magnetic levitation motor 7 experiences mechanical vibration, the vibration is absorbed by the rubber ring 30, thereby reducing mechanical noise.

[0056] Please see Figure 9 and Figure 11 A sealing strip 27 is fixedly connected to the circumferential side wall of the bearing plate 5. The outer wall of the sealing strip 27 abuts against the inner wall of the soundproof cover 2. The sealing strip 27 has a U-shaped structure.

[0057] Specifically, the support plate 5 and the sealing strip 27 work together to divide the inner cavity of the soundproof cover 2 into two chambers connected at the upper and lower ends. The noise waves generated in the volute 8 need to be transmitted to the external environment of the soundproof cover 2. The noise waves need to enter the lower cavity of the support plate 5 from the cavity above the support plate 5 through the rectangular gap (between one end of the support plate 5 and the soundproof cover 2). Then, the noise waves radiate and propagate to the external environment from the grid plate 15 after passing through the rectangular box 12, which increases the propagation path length of the noise waves. Furthermore, the two cavities inside the soundproof cover 2 fully consume the kinetic energy of the noise waves, thereby further improving the noise reduction effect.

[0058] Please see Figure 9 and Figure 11 Above the air intake pipe 9 is a sound-absorbing cover 31 that is fixedly connected to the inner wall of the sound insulation cover 2. The lower end of the sound-absorbing cover 31 abuts against a horizontal sound-absorbing plate 32 that is fixedly connected to the support plate 5. The horizontal sound-absorbing plate 32 and the sound-absorbing cover 31 together form a rectangular cover with one end open.

[0059] Specifically, the air intake of intake pipe 9 is located inside a rectangular cover. The spherical waves generated when noise radiates outward from intake pipe 9 are absorbed by the rectangular cover, reducing noise leakage and further improving noise reduction. Please refer to [link / reference]. Figure 9 and Figure 11 A vertical sound-absorbing plate 33 is fixedly connected to the inner wall of the soundproof cover 2 on the side opposite to the sound-absorbing cover 31, and the vertical sound-absorbing plate 33 completely covers the inner wall of the soundproof cover 2 on that side.

[0060] Specifically, the vertical sound-absorbing plate 33 absorbs various noise sound waves inside the soundproof cover 2, thereby further reducing the probability of noise propagating and radiating to the external environment.

[0061] Please see Figure 3 and Figure 12 A muffler 34 is fixedly connected to the intake end of the intake pipe 9. The muffler 34 further eliminates noise waves. It should be noted that the muffler 34 is prior art and will not be described in detail in this application.

[0062] Compared to traditional magnetic levitation fans, this invention uses a liftable soundproof cover 2 to isolate noise without affecting the disassembly and maintenance of the equipment. The inner cavity of the soundproof cover 2 is divided into two connected cavities by a support plate 5 with a sealing strip 27, increasing the path length of noise waves to the external environment and making full use of the inner cavity of the soundproof cover 2 to consume sound wave energy, thereby improving the noise reduction effect. In addition, the sound-absorbing cover 31 and horizontal sound-absorbing plate 32 set on the outside of the air inlet pipe 9, and the vertical sound-absorbing plate 33 set on one side of the rectangular gap, absorb noise waves from multiple angles, further improving the noise reduction effect.

[0063] The above description is merely a preferred embodiment of the present invention; however, the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and its improved concept, should be covered within the scope of protection of the present invention.

Claims

1. A magnetic levitation fan with a noise reduction device, characterized in that, Includes a base (1), a soundproof cover (2) is snapped onto the upper end of the base (1), a sealing ring (3) is fixedly connected at the snap-fit ​​joint between the base (1) and the soundproof cover (2), a support plate (5) is provided inside the soundproof cover (2), a rectangular gap for airflow is formed between the support plate (5) and the inner wall of one side of the soundproof cover (2), the lower end of the support plate (5) is fixedly connected to the base (1) through multiple support rods (6); a magnetic levitation motor (7) is fixedly connected on the support plate (5), a volute (8) is fixedly connected to the housing of the magnetic levitation motor (7), an impeller fixedly connected to the output end of the magnetic levitation motor (7) is provided inside the volute (8), an air inlet pipe (9) is fixedly connected to the front end of the volute (8), and an exhaust pipe (10) is fixedly connected to the upper end of the volute (8); A dust removal mechanism (11) is provided below the support plate (5). The dust removal mechanism (11) includes a rectangular box (12) fixedly connected to the base (1). A U-shaped cavity (1201) is opened inside the rectangular box (12). An air intake hood (13) is fixedly connected to the right end of the rectangular box (12). The air intake hood (13) communicates with the right end of the U-shaped cavity (1201). A sealing ring II (14) is fixedly connected to the right end of the air intake hood (13). The sealing ring II (14) abuts against the inner wall of the soundproof cover (2). The position on the soundproof cover (2) that abuts against the sealing ring II (14) is fixed. A grid plate (15) is fixedly connected to the air intake hood (13), and external air enters the air intake hood (13) through the grid plate (15). A demister (20) is fixedly connected to the inner wall of the left side of the U-shaped cavity (1201). An exhaust hole (1202) communicating with the U-shaped cavity (1201) is opened on the left side wall of the rectangular box (12). The middle part of the U-shaped cavity (1201) is a rectangular cavity. Multiple linearly equidistant guide strips (1203) are fixedly connected to the top wall of the rectangular cavity. The rectangular cavity is filled with water for adsorbing dust. The water level is lower than the lower end of the guide strips (1203).

2. A magnetic levitation fan with a noise reduction device according to claim 1, characterized in that, The U-shaped cavity (1201) is fixedly connected to the outlet of a water pump (16) through a pipe. The housing of the water pump (16) is fixedly connected to the base (1). The inlet of the water pump (16) is connected to an external water source. The lower end of the rectangular box (12) is fixedly connected to a drain pipe (17). The drain pipe (17) passes through the base (1), and a solenoid valve (18) is fixedly connected to the drain pipe (17). An infrared liquid level sensor (19) is fixedly connected to the inner wall of the U-shaped cavity (1201). The water pump (16), the solenoid valve (18), and the infrared liquid level sensor (19) are all electrically connected to the same controller.

3. A magnetic levitation fan with a noise reduction device according to claim 1, characterized in that, The soundproof cover (2) is a hollow box structure with an opening at the bottom. A vertical protrusion ring (101) is fixedly connected to the base (1). A sealing ring (3) is fixed on the inner wall of the vertical protrusion ring (101). A horizontal protrusion ring (202) is fixedly connected to the lower end of the soundproof cover (2). The lower end face of the horizontal protrusion ring (202) abuts against the upper end face of the sealing ring (3).

4. A magnetic levitation fan with a noise reduction device according to claim 1, characterized in that, The soundproof cover (2) is made of either steel plate or lead plate, and the sealing ring one (3) and sealing ring two (14) are made of rubber material.

5. A magnetic levitation fan with a noise reduction device according to claim 1, characterized in that, The soundproof cover (2) is connected to a lifting mechanism (4) that drives it to move up and down. The lifting mechanism (4) includes a slider (21) that is fixedly connected to the outer wall of the soundproof cover (2). The slider (21) is slidably connected to a slide frame (22). The lower end of the slide frame (22) is fixedly connected to the base (1). A lead screw (23) is rotatably connected inside the slide frame (22). The lead screw (23) is threadedly connected to the slider (21). A worm wheel (24) is fixedly connected to the lower part of the lead screw (23). The worm wheel (24) meshes with a worm (25). The worm (25) extends to the outside of the slide frame (22) and is fixedly connected to a hand crank (26). The worm (25) is rotatably connected to the slide frame (22).

6. A magnetic levitation fan with a noise reduction device according to claim 1, characterized in that, The exhaust pipe (10) is provided with a flange one at the end away from the volute (8). The flange one abuts against the inner wall of the soundproof cover (2) and a sealing ring three is fixed at the abutment. The outer wall of the soundproof cover (2) is provided with a through hole that communicates with the exhaust pipe (10). An outer pipe (35) is provided on the outside of the through hole and is fixedly connected to the soundproof cover (2). A flange two is provided at the abutment of the outer pipe (35) and the outer wall of the soundproof cover (2). The flange one and the flange two are connected by fastening bolts. The soundproof cover (2) is provided with an air inlet groove (201) for fixing the grille plate (15). The grille plate (15) is provided with multiple rectangular through grooves.

7. A magnetic levitation fan with a noise reduction device according to claim 1, characterized in that, The upper end of the support rod (6) is slidably sleeved with a cylinder (28) that penetrates the bearing plate (5). The cylinder (28) and the bearing plate (5) are integrally formed. The cylinder (28) is provided with a fixing bolt (29) that penetrates the bearing plate (5). The lower end of the fixing bolt (29) is threadedly connected to the upper end of the support rod (6). The upper and lower ends of the bearing plate (5) are both abutted by rubber rings (30) sleeved on the fixing bolts (29). The upper end of the upper rubber ring (30) abuts against the bolt head of the fixing bolt (29), and the lower end of the lower rubber ring (30) abuts against the upper end of the support rod (6).

8. A magnetic levitation fan with a noise reduction device according to claim 1, characterized in that, A sealing strip (27) is fixedly connected to the circumferential side wall of the bearing plate (5). The outer wall of the sealing strip (27) abuts against the inner wall of the soundproof cover (2). The sealing strip (27) has a U-shaped structure.

9. A magnetic levitation fan with a noise reduction device according to claim 8, characterized in that, Above the air intake pipe (9) is a sound-absorbing cover (31) that is fixedly connected to the inner wall of the soundproof cover (2). The lower end of the sound-absorbing cover (31) abuts against a horizontal sound-absorbing plate (32) that is fixedly connected to the support plate (5). The horizontal sound-absorbing plate (32) and the sound-absorbing cover (31) together form a rectangular cover with one end open.

10. A magnetic levitation fan with a noise reduction device according to claim 9, characterized in that, A vertical sound-absorbing plate (33) is fixedly connected to the inner wall of the soundproof cover (2) on the side opposite to the sound-absorbing cover (31), and the vertical sound-absorbing plate (33) completely covers the inner wall of the soundproof cover (2) on that side.

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