Centrifugal fan applying outer rotor motor

Abstract

The invention relates to the technical field of centrifugal fans, and discloses a centrifugal fan applying an external rotor motor, which comprises a centrifugal fan, and the centrifugal fan comprises a protective shell. According to the centrifugal fan applying the outer rotor motor, the centrifugal fan blades are directly driven by the outer rotor motor, the problem of unbalanced rotational inertia during high-speed operation is effectively solved by utilizing the integrated design structural characteristic of the centrifugal fan, the vibration amplitude of the whole fan is greatly reduced by matching with a high-precision bearing and precise clearance control, noise is reduced from the source, and meanwhile, the service life of the centrifugal fan is prolonged. According to the innovatively-designed modular volute connecting structure, through embedded assembly and a multi-layer vibration damping system, the cooperative work stability of components of the air conditioning system is remarkably improved, the actually-measured vibration transmissibility is greatly reduced, in addition, the electrostatic dust collection assembly adopts high-voltage pulse to ionize air, dust is adsorbed by a dust collection electrode after being electrified, the dust collection efficiency is high, and the dust collection effect is good. And dust is removed through a micro vibration motor and fan airflow, so that the efficiency of the impeller is prevented from being reduced.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of centrifugal fan, in particular to a centrifugal fan applying an outer rotor motor. BACKGROUND

[0002] With the advancement of industrialization process in China, the industrial industry vigorously carries out energy saving and consumption reduction, industrial upgrading and integration and reorganization, and a large number of industrial basic equipment is updated. As an important supporting equipment of industry, centrifugal fan will be more applied in the fields of power, cement, petrochemical industry, coal, mine and environmental protection. Under the new economic development situation, the centrifugal fan industry will continue to maintain rapid growth in the future. At the same time, centrifugal fan is also developing towards higher efficiency and intelligence. The progress of material technology reduces the manufacturing cost and improves the durability. Intelligent control technology enables the fan to automatically adjust the wind speed according to the actual demand to save energy. The rise of digital technology improves the management and maintenance efficiency of remote monitoring and fault diagnosis system. In the future, environmental protection and energy saving will continue to be an important direction of the development of centrifugal fan.

[0003] At present, the centrifugal fan used in air conditioner converts mechanical energy into kinetic energy and pressure energy of gas through high-speed rotating impeller, which has impeller, volute, inlet and outlet, motor, bearing and support. When working, gas enters the center of impeller from the axial direction of fan, and the impeller blade drives the gas to rotate at high speed. The gas is thrown to the outer edge of the impeller under the action of centrifugal force, and the kinetic energy and pressure increase significantly. The high-speed gas enters the volute-shaped channel, the speed decreases, the kinetic energy is further converted into static pressure energy, and the high-pressure gas is discharged through the outlet, completing the conveying or pressurizing process.

[0004] However, the existing centrifugal fan often generates vibration during operation. If not properly installed, the vibration will be transmitted to other parts in the air conditioning system, resulting in increased noise and affecting the use experience. SUMMARY

[0005] The purpose of the present application is to provide a centrifugal fan applying an outer rotor motor to solve the problems in the background art.

[0006] In order to solve the above technical problems, the present application provides the following technical scheme: a centrifugal fan applying an outer rotor motor, comprising a centrifugal fan, wherein the centrifugal fan comprises a protective shell; The protective shell is used for protecting the centrifugal fan, the protective shell comprises an air inlet shell, the surface of the air inlet shell is provided with an air inlet, the surface of the air inlet shell is fixedly connected with a clamping block one, the surface of the clamping block one is connected with a connecting block one, the surface of the connecting block one away from the clamping block one is fixedly connected with an upper volute, the inner wall of the upper volute is fixedly connected with a filter screen, the surface of the upper volute is fixedly connected with a clamping block two, the surface of the clamping block two is connected with a connecting block two, the surface of the connecting block two away from the clamping block two is fixedly connected with a lower volute, and the inner wall of the lower volute is provided with an arc-shaped buffer block. The centrifugal fan further comprises a rotor assembly, the rotor assembly is used for air introduction into a chamber, temperature adjustment in the chamber, wind speed and wind volume control through speed adjustment, the rotor assembly comprises a centrifugal fan blade shell, the inner wall of the centrifugal fan blade shell is rotationally connected with a mounting shell, the inner wall of the mounting shell is fixedly connected with a rotor magnetic ring, the inner wall of the rotor magnetic ring is fixedly connected with a stator core, the inner wall of the stator core is fixedly connected with a support, the inner wall of the support is fixedly connected with a limiting shaft sleeve, the inner wall of the limiting shaft sleeve is fixedly connected with a rotating shaft, and the surface of the rotating shaft is fixedly connected with a bearing.

[0007] The centrifugal fan further comprises an electrostatic dust removal assembly, the electrostatic dust removal assembly ionizes air through a high-voltage electric field to charge dust and uses a periodic high-voltage pulse to adsorb the charged dust to a dust collection electrode, the electrostatic dust removal assembly comprises a high-voltage generator, the surface of the high-voltage generator is electrically connected with a wire one, the wire one is fixedly connected with an ionization electrode at an end away from the high-voltage generator, the surface of the high-voltage generator is electrically connected with a wire two, the wire two is fixedly connected with the dust collection electrode at an end away from the high-voltage generator, the surface of the high-voltage generator is electrically connected with a wire three, the wire three is fixedly connected with a micro vibration motor at an end away from the high-voltage generator, the surface of the high-voltage generator is slidably connected with a mounting bracket, the mounting bracket is fixedly connected with the lower volute, the mounting bracket is provided with a sliding groove, the inner wall of the sliding groove is slidably connected with a sliding block, the surface of the sliding block is fixedly connected with a protruding block, the surface of the mounting bracket is provided with a sliding groove, the protruding block penetrates through the mounting bracket and is slidably connected with the inner wall of the sliding groove, the inner wall of the sliding groove is fixedly connected with a spring, and the spring is fixedly connected with the sliding block at an end away from the sliding groove.

[0008] The surface of the micro vibration motor is fixedly connected with a conducting rod, and the conducting rod is fixedly connected with the dust collection electrode at an end away from the micro vibration motor.

[0009] The high-voltage generator outputs 8-12kV pulse direct current, the pulse frequency is 50-200Hz, the surface of the dust collecting electrode is provided with honeycomb-shaped slot holes, the mesh diameter is 2-3mm, the distance between the dust collecting electrode and the ionizing electrode is 5-8mm; the working period of the micro vibration motor is 5 seconds of vibration every 10 minutes, the vibration frequency is 100-150Hz, and the amplitude is 0.5-1.0mm.

[0010] The surface of the first wire penetrates through the lower volute and is fixedly connected with the lower volute, the surface of the second wire penetrates through the lower volute and is fixedly connected with the lower volute, the surface of the third wire penetrates through the lower volute and is fixedly connected with the lower volute, and the high-voltage generator is powered by an external power supply.

[0011] The upper volute and the lower volute are made of high-temperature-resistant and corrosion-resistant materials to ensure the stability and durability of the centrifugal fan during long-time operation.

[0012] The surface of the end of the rotating shaft away from the centrifugal fan blade shell is rotationally connected with the lower volute, and the surface of the bracket is fixedly connected with a limiting shell.

[0013] The centrifugal fan blade shell in the rotor assembly is designed to be streamlined to reduce air resistance when air flows and improve the efficiency of the fan, and the bearing is a high-precision and low-noise bearing to ensure the stability and quietness of the rotating shaft during high-speed rotation.

[0014] The blades of the centrifugal fan blade shell are backward curved, and the gap between the blade ends and the inner wall of the upper volute is 0.5-1.0mm.

[0015] Compared with the prior art, the beneficial effects achieved by the present application are: First, the present application directly drives the centrifugal fan blades by using an external rotor motor, effectively reduces the rotational inertia imbalance problem during high-speed operation by utilizing the structural characteristics of the integrated design of the rotor and the impeller, and cooperates with the high-precision support of the bearing and the precise gap control of 0.5-1.0mm between the end of the centrifugal fan blade shell and the volute, so that the vibration amplitude of the whole machine is reduced by 40%-60%, and the noise is reduced from the source.

[0016] Second, the modular volute connection structure innovatively designed in the present application is assembled by embedding the clamping block one and the connecting block one and embedding the clamping block two and the connecting block two, combined with the limiting shaft sleeve and the bracket limiting shell arranged inside the lower volute, to form a multi-level vibration damping system, when the fan operating frequency reaches 2000rpm, the measured vibration transmission rate is reduced by 72% compared with the traditional flange fixing method, significantly improving the cooperative working stability of the air conditioning system components.

[0017] Third, the electrostatic dust removal assembly of the application adopts 8-12kV pulse high voltage, ionizes air, makes the dust on the fan blade charged and then be adsorbed by the honeycomb dust collecting electrode, the dust removal efficiency is more than 95%, after the adsorption of the dust collecting electrode is completed, the dust is knocked down by the micro vibration motor, the airflow guided by the fan blows the dust to the subsequent air conditioner filter screen, avoiding the efficiency reduction caused by the too much dust mixed in the impeller after the long time use of the centrifugal fan. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 is a schematic view of the overall structure of the application; Figure 2 is a schematic view of the rear side of the overall structure of the application; Figure 3 is a schematic view of the upper volute structure of the application; Figure 4 is a schematic view of the air inlet shell structure of the application; Figure 5 is a schematic view of the internal structure of the lower volute of the application; Figure 6 is an exploded view of the lower volute structure of the application; Figure 7 is a sectional view of the rotor assembly of the application; Figure 8 is a schematic view of the disassembly of part of the assembly of the application.

[0019] Legend: 1, centrifugal fan; 10, protective shell; 1001, air inlet shell; 1002, air inlet; 1003, clamping block one; 1004, upper volute; 1005, connecting block one; 1006, clamping block two; 1007, lower volute; 1008, filter screen; 1009, connecting block two; 20, rotor assembly; 2001, centrifugal fan blade shell; 2002, mounting shell; 2003, rotor magnetic ring; 2004, stator core; 2005, limiting shaft sleeve; 2006, rotating shaft; 2007, limiting shell; 2008, bearing; 2009, support; 30, electrostatic dust removal assembly; 3001, high voltage generator; 3003, micro vibration motor; 3004, ionizing electrode; 3005, dust collecting electrode; 3006, conducting rod; 3007, mounting bracket; 3008, sliding block; 3009, protrusion; 3010, spring; 3011, sliding groove. DETAILED DESCRIPTION

[0020] With reference to the drawings of the embodiments of the present application, the technical solutions in the embodiments of the present application will be described clearly and completely. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments of the present application, all other embodiments obtained by those skilled in the art without creative work fall within the scope of the present application.

[0021] Embodiments As shown in Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 and Figure 7 , the present application provides a technical solution: a centrifugal fan using an outer rotor motor, comprising a centrifugal fan 1, the centrifugal fan 1 comprising a protective shell 10; The protective shell 10 is used for protection of the centrifugal fan 1, and the protective shell 10 comprises an air inlet shell 1001, the surface of the air inlet shell 1001 is provided with an air inlet 1002, the surface of the air inlet shell 1001 is fixedly connected with a clamping block one 1003, the surface of the clamping block one 1003 is connected with a connecting block one 1005, the surface of the connecting block one 1005 away from the clamping block one 1003 is fixedly connected with an upper volute 1004, the inner wall of the upper volute 1004 is fixedly connected with a filter screen 1008, the surface of the upper volute 1004 is fixedly connected with a clamping block two 1006, the surface of the clamping block two 1006 is connected with a connecting block two 1009, the surface of the connecting block two 1009 away from the clamping block two 1006 is fixedly connected with a lower volute 1007, and the inner wall of the lower volute 1007 is provided with an arc-shaped buffer block; The centrifugal fan 1 further comprises a rotor assembly 20, the rotor assembly 20 is used for air introduction into a room, adjustment of room temperature, and control of air speed and air volume by adjusting rotating speed, the rotor assembly 20 comprises a centrifugal fan blade shell 2001, the inner wall of the centrifugal fan blade shell 2001 is rotatably connected with a mounting shell 2002, the inner wall of the mounting shell 2002 is fixedly connected with a rotor magnetic ring 2003, the inner wall of the rotor magnetic ring 2003 is fixedly connected with a stator core 2004, the inner wall of the stator core 2004 is fixedly connected with a support 2009, the inner wall of the support 2009 is fixedly connected with a limiting shaft sleeve 2005, the inner wall of the limiting shaft sleeve 2005 is fixedly connected with a rotating shaft 2006, and the surface of the rotating shaft 2006 is fixedly connected with a bearing 2008.

[0022] The centrifugal fan 1 is protected by the protective shell 10, wherein the air inlet 1002 of the air inlet shell 1001 is used to introduce air, the embedded assembly of the clamping block one 1003 and the connecting block one 1005, the clamping block two 1006 and the connecting block two 1009 realizes the modular connection of the upper volute 1004 and the lower volute 1007, ensures the structural stability and facilitates maintenance, the rotor assembly 20 is driven by the outer rotor motor, the rotor magnetic ring 2003 is designed in an integrated manner with the centrifugal fan blade shell 2001, directly drives the impeller to rotate, the stator core 2004 is fixed through the support 2009, the limiting shaft sleeve 2005 and the bearing 2008 provide high-precision support for the rotating shaft 2006, ensure that the fan runs stably and low noise, the filter screen 1008 in the upper volute 1004 is used to filter impurities in the air, the electrostatic dust removal assembly 30 ionizes air through a high-voltage electric field to make dust charged, after the dust collecting electrode 3005 adsorbs dust, the miniature vibration motor 3003 vibrates regularly to remove dust, maintains the dust removal effect, the overall design realizes the functions of high efficiency, low noise and automatic dust removal, significantly improves the performance and user experience of the fan, the rotor assembly 20 includes the rotor magnetic ring 2003, wherein the rotor magnetic ring 2003 is arranged on the inner side of the middle part on one side of the centrifugal fan blade shell 2001, the stator core 2004 structure is inserted on the inner side of the middle part on one side of the centrifugal fan blade shell 2001, and is in magnetic suspension cooperation with the rotor magnetic ring 2003, and a gap of 0.2mm-2mm is left between the outer wall of the stator core 2004 structure and the rotor magnetic ring 2003, so that the overall volume of the motor can be effectively reduced, and the silence and efficiency of the motor operation can be improved, the magnetic grooves are symmetrically arranged on both sides of the outer surface of the rotor magnetic ring 2003, and the magnetic groove structure can facilitate positioning when the stator core 2004 and the rotor magnetic ring 2003 are assembled, and the efficiency of motor assembly is improved. Specifically, in the embodiment, the stator core 2004 can be selected from a structure of twelve slots and ten poles or twelve slots and fourteen poles The centrifugal fan 1 further comprises an electrostatic dust removal assembly 30, the electrostatic dust removal assembly 30 charges dust by ionizing air through a high-voltage electric field and adsorbs the charged dust to a dust collection electrode by using a periodic high-voltage pulse, the electrostatic dust removal assembly 30 comprises a high-voltage generator 3001, a surface of the high-voltage generator 3001 is electrically connected with a wire one, one end of the wire one away from the high-voltage generator 3001 is fixedly connected with an ionizing electrode 3004, the surface of the high-voltage generator 3001 is electrically connected with a wire two, one end of the wire two away from the high-voltage generator 3001 is fixedly connected with a dust collection electrode 3005, the surface of the high-voltage generator 3001 is electrically connected with a wire three, one end of the wire three away from the high-voltage generator 3001 is fixedly connected with a micro vibration motor 3003, the surface of the high-voltage generator 3001 is slidably connected with a mounting bracket 3007, the mounting bracket 3007 is fixedly connected with the lower volute 1007, the mounting bracket 3007 is provided with a sliding groove, an inner wall of the sliding groove is slidably connected with a sliding block 3008, the surface of the sliding block 3008 is fixedly connected with a protruding block 3009, the surface of the mounting bracket 3007 is provided with a sliding groove 3011, the protruding block 3009 penetrates through the mounting bracket 3007 and is slidably connected with an inner wall of the sliding groove 3011, the inner wall of the sliding groove is fixedly connected with a spring 3010, one end of the spring 3010 away from the sliding groove is fixedly connected with the sliding block 3008.

[0023] The electrostatic dust removal assembly 30 outputs 8-12kV pulse direct current through the high-voltage generator 3001, the ionization electrode 3004 generates a high-voltage electric field, dust particles in the air are charged, and the charged dust is adsorbed to the dust collection electrode 3005 under the action of the electric field. The dust collection electrode 3005 is provided with a honeycomb-shaped slot hole on the surface to increase the adsorption area and improve the dust removal efficiency. The dust removal efficiency can reach more than 95%. The miniature vibration motor 3003 is connected with the high-voltage generator 3001 through a wire III. The vibration frequency is 100-150Hz, and the amplitude is 0.5-1.0mm. The adsorbed dust is shaken off through the transmission rod 3006, and the shaken-off dust is blown to the subsequent air conditioner filter screen through the airflow guided by the fan, thereby avoiding the accumulation of dust in the centrifugal fan, maintaining the efficient operation of the fan, prolonging the service life of the fan, reducing the maintenance cost, and additionally, the electrostatic dust removal assembly 30 can be installed on the surface of the lower volute 1007 through the mounting bracket 3007. When the electrostatic dust removal assembly 30 is installed, the high-voltage generator 3001 is directly inserted into the mounting bracket 3007, the spring 3010 is retracted by extruding the sliding block 3008 in the mounting bracket 3007, and after the high-voltage generator 3001 is installed in the mounting bracket 3007, the spring 3010 will rebound to reset the sliding block 3008 to the top end of the high-voltage generator 3001 to clamp the high-voltage generator 3001 in the mounting bracket 3007. During subsequent maintenance, the maintenance personnel can make the sliding block 3008 move away from the upper end of the high-voltage generator 3001 through the sliding protrusion 3009, and then the electrostatic dust removal assembly 30 can be taken out. The pre-tightening force of the spring 3010 can absorb part of the vibration energy, maintain the stability of the high-voltage electric field, ensure that the dust adsorption does not deviate, and then reduce the influence of the resonance generated by the high-voltage generator 3001 when the miniature vibration motor 3003 vibrates on the dust removal precision.

[0024] The surface of the miniature vibration motor 3003 is fixedly connected with the transmission rod 3006, and the end, away from the miniature vibration motor 3003, of the transmission rod 3006 is fixedly connected with the dust collection electrode 3005.

[0025] The miniature vibration motor 3003 is fixedly connected with the dust collection electrode 3005 through the transmission rod 3006. After the dust collection electrode 3005 adsorbs the dust, the adsorbed dust is shaken off through periodic vibration, i.e., vibration for 5 seconds every 10 minutes, with a vibration frequency of 100-150Hz and an amplitude of 0.5-1.0mm. The shaken-off dust is blown to the subsequent air conditioner filter screen through the airflow guided by the fan, thereby avoiding the accumulation of dust on the dust collection electrode, maintaining the continuous and efficient operation of the dust removal assembly, prolonging the service life of the centrifugal fan, and reducing the maintenance requirement.

[0026] The high-voltage generator 3001 outputs 8-12kV pulse direct current with a pulse frequency of 50-200Hz. The surface of the dust collecting electrode 3005 is provided with honeycomb-shaped grooves with a mesh diameter of 2-3mm. The distance between the dust collecting electrode 3005 and the ionizing electrode 3004 is 5-8mm. The working cycle of the micro-vibration motor 3003 is 5 seconds of vibration every 10 minutes, the vibration frequency is 100-150Hz, and the amplitude is 0.5-1.0mm.

[0027] The high-voltage generator 3001 outputs 8-12kV pulse direct current with a pulse frequency of 50-200Hz. The surface of the dust collecting electrode 3005 is provided with honeycomb-shaped grooves with a mesh diameter of 2-3mm. The distance between the dust collecting electrode 3005 and the ionizing electrode 3004 is 5-8mm. The working cycle of the micro-vibration motor 3003 is 5 seconds of vibration every 10 minutes, the vibration frequency is 100-150Hz, and the amplitude is 0.5-1.0mm. The adsorbed dust is shaken off through the conducting rod 3006, and the shaken-off dust is blown to the subsequent air conditioner filter screen through the airflow guided by the fan, avoiding the accumulation of dust on the dust collecting electrode and maintaining the continuous and efficient operation of the dust removal assembly, prolonging the service life of the centrifugal fan and reducing the maintenance requirements. The surface of the first wire penetrates through the lower volute 1007 and is fixedly connected with the lower volute 1007. The surface of the second wire penetrates through the lower volute 1007 and is fixedly connected with the lower volute 1007. The surface of the third wire penetrates through the lower volute 1007 and is fixedly connected with the lower volute 1007. The high-voltage generator 3001 is powered by an external power source.

[0028] The first wire, the second wire and the third wire penetrate through the lower volute 1007 and are fixedly connected with the lower volute 1007, ensuring that the electrical connection between the high-voltage generator 3001 and the ionizing electrode 3004, the dust collecting electrode 3005 and the micro-vibration motor 3003 is stable and reliable, avoiding loosening or failure of the connection due to vibration or external interference. The high-voltage generator 3001 is powered by an external power source to provide stable high-voltage pulse direct current for the electrostatic dust removal assembly 30, ensuring that the ionizing electrode 3004 generates a high-voltage electric field, the dust collecting electrode 3005 efficiently adsorbs charged dust, and the micro-vibration motor 3003 periodically vibrates to remove dust, thereby realizing the continuous and efficient dust removal function of the centrifugal fan, prolonging the service life of the equipment and reducing the maintenance requirements.

[0029] The upper volute 1004 and the lower volute 1007 are made of high-temperature-resistant and corrosion-resistant materials to ensure the stability and durability of the centrifugal fan 1 during long-term operation.

[0030] The upper volute 1004 and the lower volute 1007 are made of high-temperature-resistant and corrosion-resistant materials, which can resist high temperature, humidity and corrosive environment during long-term operation, ensuring the structural stability and durability of the centrifugal fan 1. This design not only prolongs the service life of the fan, but also improves its reliability in harsh working conditions, reduces maintenance and replacement costs due to material aging or damage, and ensures the continuous and efficient operation of the fan, meeting the long-term use requirements of industrial and household scenarios.

[0031] The end surface of the rotating shaft 2006 away from the centrifugal fan blade shell 2001 is rotationally connected to the lower volute 1007, and the surface of the bracket 2009 is fixedly connected to the limiting shell 2007.

[0032] The end surface of the rotating shaft 2006 away from the centrifugal fan blade shell 2001 is rotationally connected to the lower volute 1007, and the surface of the bracket 2009 is fixedly connected to the limiting shell 2007.

[0033] The centrifugal fan blade shell 2001 in the rotor assembly 20 is designed to be streamlined to reduce air flow resistance and improve fan efficiency. The bearing 2008 is a high-precision, low-noise bearing to ensure the stability and quietness of the rotating shaft 2006 during high-speed rotation.

[0034] The centrifugal fan blade shell 2001 in the rotor assembly 20 is designed to be streamlined to effectively reduce air flow resistance and optimize airflow path, thereby improving fan efficiency and performance. Meanwhile, the bearing 2008 is a high-precision, low-noise bearing that provides stable support for the rotating shaft 2006, ensuring smooth operation during high-speed rotation and significantly reducing vibration and noise. This design not only improves the overall working efficiency of the fan, but also improves the quietness and reliability during operation, meeting the needs of users for high-efficiency, low-noise fans.

[0035] The blades of the centrifugal fan blade shell 2001 are backward curved, and the gap between the blade tips and the inner wall of the upper volute 1004 is 0.5-1.0mm.

[0036] The blades of the centrifugal fan shell 2001 adopt a backward bending design, which can optimize the airflow flow path, improve the aerodynamic efficiency of the fan, reduce energy loss, and control the gap between the blade end and the inner wall of the upper volute 1004 to 0.5-1.0mm, ensuring that the airflow does not produce obvious leakage or turbulence when passing through, further improving the overall performance and efficiency of the fan. This precise design not only reduces operating noise, but also reduces vibration, prolongs the service life of the fan, and maintains stability and reliability while operating efficiently.

[0037] Working principle: air enters the centrifugal fan 1 through the air inlet 1002 of the air inlet housing 1001, and the rotor assembly 20 realizes the rotation of the rotor magnetic ring 2003 through the electromagnetic induction between the rotor magnetic ring 2003 and the stator core 2004, so that the centrifugal fan shell 2001 can rotate synchronously under the driving action of the rotor magnetic ring 2003, sucking air from the axial direction and throwing it to the outer edge of the impeller. Under the action of centrifugal force, the kinetic energy and pressure of the air increase significantly, and then enters the volute-shaped channel composed of the upper volute 1004 and the lower volute 1007. The air speed is reduced, and the kinetic energy is further converted into static pressure energy. Finally, the high-pressure air is discharged through the air outlet, completing the air delivery or pressurization process. The rotor assembly 20 adopts an outer rotor motor structure, and the rotor magnetic ring 2003 and the centrifugal fan shell 2001 are integrated into a design to directly drive the impeller to rotate. This effectively reduces the imbalance of moment of inertia during high-speed operation, reducing vibration and noise. The stator core 2004 is fixed by a bracket 2009 to ensure the stability of the motor. The bearing 2008 provides high-precision support for the rotating shaft 2006, further reducing vibration and noise. The electrostatic dust removal component 30 outputs 8-12kV pulsed DC power through the high-voltage generator 3001. The ionization electrode 3004 generates a high-voltage electric field, charging dust particles in the air. The charged dust is attracted to the dust collecting electrode 3005 under the action of the electric field. The surface of the dust collecting electrode 3005 is provided with honeycomb-shaped slots to increase the adsorption area and improve the dust removal efficiency, which can reach over 95%. After the dust collecting electrode 3005 absorbs the dust, the micro vibration motor 3003 vibrates for 5 seconds every 10 minutes, with a vibration frequency of 100-150Hz and an amplitude of 0.5-1.0mm, the adsorbed dust is shaken off through the conducting rod 3006, the shaken dust is blown to the subsequent air conditioner filter screen through the air flow guided by the fan, dust accumulation in the centrifugal fan is avoided, high efficient operation of the fan is maintained, and the electrostatic dust removal assembly 30 can be installed on the surface of the lower volute 1007 through the mounting frame 3007, when the electrostatic dust removal assembly 30 is installed, the high-voltage generator 3001 is directly inserted into the mounting frame 3007, the spring 3010 is contracted by extruding the sliding block 3008 in the mounting frame 3007, after the high-voltage generator 3001 is installed into the mounting frame 3007, the spring 3010 will rebound, the sliding block 3008 is reset to the top end of the high-voltage generator 3001, the high-voltage generator 3001 is clamped in the mounting frame 3007, during subsequent maintenance, the maintenance personnel can make the sliding block 3008 leave the upper end of the high-voltage generator 3001 through the sliding protrusion 3009, and then the electrostatic dust removal assembly 30 can be taken out, the protective shell 10 adopts a modular design, through the embedded assembly of the clamping block one 1003 and the connecting block one 1005, the clamping block two 1006 and the connecting block two 1009, in combination with the limiting shell 2007 of the limiting shaft sleeve 2005 and the support 2009 arranged in the lower volute 1007, a multi-level vibration damping system is formed, vibration transmission rate is significantly reduced, when the fan operation frequency reaches 2000rpm, the measured vibration transmission rate is reduced by 72% compared with the traditional flange fixing mode, the stability of the cooperation of the air conditioning system components is improved, the upper volute 1004 and the lower volute 1007 are made of high-temperature-resistant and corrosion-resistant materials such as polyphenylene sulfide and polyether ether ketone, the stability and durability of the centrifugal fan 1 during long-time operation are ensured, the centrifugal fan blade shell 2001 is designed as a streamline, the blade is a backward curved type, the gap between the blade end and the inner wall of the upper volute 1004 is 0.5-1.0mm, air resistance during air flow is reduced, and fan efficiency is improved, through the above working principle, the centrifugal fan function of high efficiency, low noise and automatic dust removal is realized, and the performance and user experience of the fan are significantly improved.

[0038] Although embodiments of the present application have been shown and described, it is to be understood that various modifications, substitutions, replacements and changes can be made to these embodiments without departing from the principles and spirit of the present application, the scope of the present application being defined by the appended claims and their equivalents.

Claims

1. A centrifugal fan using an outer rotor motor, comprising a centrifugal fan (1), characterized in that: The centrifugal fan (1) comprises a protective housing (10); The protective housing (10) is used to protect the centrifugal fan (1), and the protective housing (10) includes an air inlet housing (1001), the surface of the air inlet housing (1001) is provided with an air inlet (1002), the surface of the air inlet housing (1001) is fixedly connected to a clamping block 1 (1003), the surface of the clamping block 1 (1003) is clamped to a connecting block 1 (1005), and the surface of the connecting block 1 (1005) away from the clamping block 1 (1003) is fixedly connected to the connecting block 1 (1005). An upper volute (1004) is provided, wherein the inner wall of the upper volute (1004) is fixedly connected to a filter screen (1008), the surface of the upper volute (1004) is fixedly connected to a second clamping block (1006), the surface of the second clamping block (1006) is clamped to a second connecting block (1009), the surface of the second connecting block (1009) away from the second clamping block (1006) is fixedly connected to a lower volute (1007), and the inner wall of the lower volute (1007) is provided with an arc-shaped buffer block; The centrifugal fan (1) further comprises a rotor assembly (20), wherein the rotor assembly (20) is used for introducing air into a room, regulating the indoor temperature, and controlling the wind speed and air volume by regulating the rotation speed. The rotor assembly (20) comprises a centrifugal fan housing (2001), wherein the inner wall of the centrifugal fan housing (2001) is rotatably connected to a mounting housing (2002), the inner wall of the mounting housing (2002) is fixedly connected to a rotor magnetic ring (2003), the inner wall of the rotor magnetic ring (2003) is fixedly connected to a stator core (2004), the inner wall of the stator core (2004) is fixedly connected to a bracket (2009), the inner wall of the bracket (2009) is fixedly connected to a limiting sleeve (2005), the inner wall of the limiting sleeve (2005) is fixedly connected to a rotating shaft (2006), and the surface of the rotating shaft (2006) is fixedly connected to a bearing (2008).

2. A centrifugal fan using an outer rotor motor according to claim 1, characterized in that: The centrifugal fan (1) further comprises an electrostatic dust removal component (30), wherein the electrostatic dust removal component (30) ionizes air through a high-voltage electric field to charge dust, and utilizes periodic high-voltage pulses to adsorb the charged dust to a dust collecting electrode, wherein the electrostatic dust removal component (30) comprises a high-voltage generator (3001), wherein the surface of the high-voltage generator (3001) is electrically connected to a first conductor, wherein the end of the first conductor away from the high-voltage generator (3001) is fixedly connected to an ionization electrode (3004), wherein the surface of the high-voltage generator (3001) is electrically connected to a second conductor, wherein the end of the second conductor away from the high-voltage generator (3001) is fixedly connected to a dust collecting electrode (3005), wherein the surface of the high-voltage generator (3001) is electrically connected to a third conductor, wherein the end of the third ... an ionization electrode (3004), wherein the surface of the high-voltage generator (3001) is electrically connected to a first conductor, wherein the end of the first conductor away from the high-voltage generator (3001) is fixedly connected to an ionization electrode (3004), wherein the surface of the high-voltage generator (3001) is electrically connected to a second conductor, wherein the end of the second conductor away from the high-voltage generator (3001) is fixedly connected to a dust collecting electrode (3005), wherein the surface of the high-voltage generator (3001) is electrically connected to a third conductor, wherein the end of the third conductor away from the high-voltage generator (3001) is fixedly connected to an ionization electrode (3004), wherein the surface of the high-voltage ) is fixedly connected to one end of a micro vibration motor (3003), the surface of the high-voltage generator (3001) is slidably connected to a mounting bracket (3007), the mounting bracket (3007) is fixedly connected to the lower volute (1007), the mounting bracket (3007) is provided with a slide groove, the inner wall of the slide groove is slidably connected to a sliding block (3008), the surface of the sliding block (3008) is fixedly connected to a protrusion (3009), the surface of the mounting bracket (3007) is provided with a sliding groove (3011), the protrusion (3009) passes through the mounting bracket (3007) and is slidably connected to the inner wall of the sliding groove (3011), the inner wall of the slide groove is fixedly connected to a spring (3010), and the end of the spring (3010) away from the slide groove is fixedly connected to the sliding block (3008).

3. A centrifugal fan using an outer rotor motor according to claim 2, characterized in that: A conductive rod (3006) is fixedly connected to the surface of the micro-vibration motor (3003), and one end of the conductive rod (3006) away from the micro-vibration motor (3003) is fixedly connected to the dust collecting electrode (3005).

4. A centrifugal fan using an outer rotor motor according to claim 2, characterized in that: The high-voltage generator (3001) outputs 8-12 kV pulsed direct current with a pulse frequency of 50-200 Hz. The surface of the dust collecting electrode (3005) is provided with honeycomb-shaped slots with a mesh diameter of 2-3 mm. The distance between the dust collecting electrode (3005) and the ionization electrode (3004) is 5-8 mm. The working cycle of the micro vibration motor (3003) is 5 seconds every 10 minutes, the vibration frequency is 100-150 Hz, and the amplitude is 0.5-1.0 mm.

5. The centrifugal fan using an outer rotor motor according to claim 2, characterized in that: The surface of the wire one passes through the lower volute (1007) and is fixedly connected to the lower volute (1007), the surface of the wire two passes through the lower volute (1007) and is fixedly connected to the lower volute (1007), the surface of the wire three passes through the lower volute (1007) and is fixedly connected to the lower volute (1007), and the high-voltage generator (3001) is powered by an external power supply.

6. The centrifugal fan using an outer rotor motor according to claim 1, characterized in that: The upper volute (1004) and the lower volute (1007) are both made of high-temperature-resistant and corrosion-resistant materials to ensure the stability and durability of the centrifugal fan (1) during long-term operation.

7. The centrifugal fan using an outer rotor motor according to claim 2, characterized in that: The surface of one end of the rotating shaft (2006) away from the centrifugal fan housing (2001) is rotatably connected to the lower volute (1007), and the surface of the bracket (2009) is fixedly connected to the limiting housing (2007).

8. The centrifugal fan using an outer rotor motor according to claim 1, characterized in that: The centrifugal fan housing (2001) in the rotor assembly (20) is designed to be streamlined to reduce resistance during air flow and improve the efficiency of the fan. The bearing (2008) adopts a high-precision, low-noise bearing to ensure the stability and quietness of the rotating shaft (2006) during high-speed rotation.

9. The centrifugal fan using an outer rotor motor according to claim 1, characterized in that: The blades of the centrifugal fan housing (2001) are backward curved, and the gap between the blade tip and the inner wall of the upper volute (1004) is 0.5-1.0 mm.

Images