280 results about "Fan noise" patented technology

The invention relates to a cooling noise control method and device for a sand-proof cooling fan in a high-temperature environment. The method comprises the following steps: measuring and analyzing fan blade parameters, a dustproof net cover structure and temperature-dust environment data, and establishing a high-temperature dust coupling dynamic model considering dust adhesion and temperature deformation; performing cyclostationary characteristic decomposition on the fan operation acoustic signal to obtain an environment sensitive Gaussian mixture cyclostationary noise model; calculating a cyclic spectrum correlation function for the fan noise signal and extracting a feature vector to obtain a noise source identification result under a high-temperature sand and dust working condition; and constructing a heat dissipation efficiency function and a noise level function in a temperature-dust-rotating speed three-dimensional parameter space, executing weight adaptive adjustment calculation, and outputting an optimal rotating speed control strategy. Dynamic balance between heat dissipation requirements and noise control is achieved, and the noise level is effectively reduced on the premise that the heat dissipation efficiency is guaranteed.

Impeller architecture for a cooling fan and methodology for making same. The impeller architecture includes a plurality of blades, individual ones of the blades have a first end that is attached to a hub component in a sequential order, such that sequential first ends are attached to the circumference. An indexing function is applied to the sequential order, and blades or the spaces therebetween are modified accordingly to have a blade type based on their sequential location and the indexing function. The indexing function can be, in a non-limiting example, odd numbers or prime numbers.

The technology described herein is directed towards a metasurface arranged with unit cells for broadband and / or multiband sound absorption, in which the unit cells are based on the principles of Helmholtz resonators. Deeply subwavelength sound absorbing unit cells are designed and constructed based on desired resonance frequencies. Each unit cell includes a neck portion and air chamber dimensioned to resonate at a desired resonance frequency and thereby inverse phase cancel corresponding frequencies of incoming sound waves. Differently designed and arranged subgroups of unit cells are part of the metasurface, which can be positioned proximate to a noise source. As practical examples, the metasurface or multiple metasurfaces can be placed near or wrapped around a computer server or rack of servers to absorb fan noise. The metasurface components (including the unit cells) can be printed by a 3D printer to result in a thin, light-weight, and cost effective noise absorbing metasurface.

The invention provides a method and device for optimizing noise of an indoor fan, an air conditioner and a storage medium, operation parameters and scene information of the air conditioner are obtained, a to-be-used rotating speed relation is determined from pre-stored corresponding relations of parameters and rotating speed relations on the basis of the operation parameters, and the to-be-used rotating speed relation comprises the corresponding relation of information and rotating speed; and determining a target rotating speed based on the scene information and the corresponding relation between the information and the rotating speed, and adjusting the rotating speed of the indoor fan based on the target rotating speed to optimize the noise. Through the mode, the corresponding target rotating speed can be determined according to different operating parameters and scene information, so that the noise is optimized, the noise can be reduced under the condition that the structure of the air conditioner does not need to be changed, and the noise reduction effect can be improved.

The invention relates to a cleaning system, the cleaning system comprises a cleaning device and a base station, the cleaning device comprises a dust box, a first dust collection unit communicating with the dust box and a battery electrically connected with the first dust collection unit, and the first dust collection unit is used for absorbing garbage outside the cleaning device into the dust box; the base station comprises a dust collection cavity and a second dust collection unit communicated with the dust collection cavity; the cleaning equipment further comprises a controller, and when the current voltage of the battery is smaller than or equal to a first voltage threshold value, the controller controls the cleaning equipment to return to the base station; the cleaning system has a dust collection mode, and when the cleaning system is in the dust collection mode, the second dust collection unit is started to absorb garbage in the dust box into the dust collection cavity. While the dust collection efficiency is improved, the base station can be equipped with the fan with smaller power, and meanwhile, the fan noise during working is also reduced.

The invention discloses a piezoelectric fan control method, a piezoelectric fan control device, an electronic device and a computer readable storage medium, and relates to the technical field of fan control. The piezoelectric fan is connected with a to-be-cooled device, and the control method comprises the steps that according to the hot spot temperature of a power device of the to-be-cooled device and the temperature of a shell of the to-be-cooled device, operation gears of the piezoelectric fan are determined, and the operation gears comprise the closing gear, the low-power-consumption optimal operation gear and the full-power gear; and under the condition that the operation gear of the piezoelectric fan is the low-power-consumption optimal operation gear, the driving voltage and the working frequency of the piezoelectric fan are adjusted according to a multi-objective function until the parameters of the multi-objective function are reduced to the minimum value, and then the piezoelectric fan is started. The parameters of the multi-objective function comprise fan power consumption and fan noise of the piezoelectric fan. According to the piezoelectric fan, low-power-consumption and low-noise operation can be kept on the premise that safe heat dissipation of the piezoelectric fan is ensured.

The technology described herein is directed towards metasurfaces arranged with unit cells for narrowband sound absorption, in which the unit cells are based on the principles of Helmholtz resonators. A deeply subwavelength sound absorbing unit-cell is designed and constructed based on a desired resonance frequency. The unit-cell includes a neck portion and air chamber dimensioned to resonate at the desired resonance frequency to inverse phase cancel corresponding narrowband frequencies of incoming sound waves. The unit cells are distributed (e.g., periodically) as part of a metasurface, e.g., positioned proximate to a noise source. As practical examples, the metasurface or multiple metasurfaces can be placed near or wrapped around a computer server or rack of servers to absorb fan noise. The metasurface components (including the unit-cells) can be manufactured using any type of additive manufacturing process such as 3D printing to result in a thin, light-weight, and cost effective noise absorbing metasurface.

The invention provides a fan noise reduction method and device, electronic equipment and a storage medium, the method is applied to the electronic equipment comprising a fan, and the method comprises the steps that the current temperature of the electronic equipment is obtained; determining a first target rotating speed of the fan based on the current temperature of the electronic equipment; determining a rotating speed fluctuation range corresponding to the first target rotating speed; the current rotating speed of the fan is controlled to be the first target rotating speed, and multiple second target rotating speeds are obtained based on the first target rotating speed and the rotating speed fluctuation range; the fan is controlled to operate at the second target rotating speeds in sequence; each second target rotating speed is used for reducing the noise of the audio of the fan. According to the method, after the rotating speed of the fan is adjusted to the target rotating speed, range fluctuation is conducted on the target rotating speed, the constant inherent frequency of fan sound can be scattered, the noise outburst ratio of the fan sound is reduced, and then noise reduction of the fan is achieved.

The invention provides a method for testing noise and vibration of a refrigeration fan of a refrigerator, relates to the field of vibration testing of refrigerators, and aims to solve the problem that the real noise performance of the fan in a complex environment in the refrigerator cannot be reflected in the current noise testing of the fan of the air-cooled refrigerator. The actual installation states of a fan, an air duct and a box body are reserved to eliminate single body test deviation, vibration and noise data are synchronously collected, time domain and frequency domain analysis is covered, vibration-noise causal relation tracing is achieved, the coupling frequency band and energy distribution of vibration and noise are quantified through time domain and frequency domain conjoint analysis, and therefore the noise source and the coupling frequency band are positioned, and the noise quality is improved. And targeted optimization is facilitated, and the noise optimization efficiency and the optimized noise control effect are improved.

The invention relates to the field of centrifugal fan industry, in particular to a multi-wing centrifugal fan impeller with an arc-shaped front disc and a multi-wing centrifugal fan, the impeller comprises the front disc and a rear disc, an exhaust inlet is formed in the middle of the front disc, and a plurality of blades are arranged on the rear disc in a surrounding array mode; the front disc is of an arc-shaped structure, the front disc comprises a front disc linear part and a front disc arc part which are connected in the direction from the air suction opening to the rear disc, and an impeller clearance fit part is arranged at the end, away from the front disc arc part, of the front disc linear part and used for connecting the impeller and the current collector. According to the multi-wing centrifugal fan impeller with the arc-shaped front disc and the multi-wing centrifugal fan, the blades on the two sides are asymmetrically designed, the contact ends of the blades and the rear disc are straight and perpendicular, the contact ends of the blades and the front disc are in arc curvature transition, and when air flow enters the impeller, the air flow can flow in the arc direction of the blades, so that a vortex area and an impact area are reduced; the fan pressure and efficiency of the multi-wing centrifugal fan are effectively improved, and fan noise generated by rotation impact when airflow enters is reduced.

The following pneumatic wet-type vibrating wire dust remover comprises an air inlet barrel, a fan barrel and an air outlet barrel which are sequentially connected and coaxially arranged, an air inlet grille is fixed to the outer side of the air inlet end of the air inlet barrel, a negative pressure spraying device is arranged in the air inlet barrel in a sleeved mode, a water inlet is formed in the outer surface of the air inlet barrel, and the negative pressure spraying device is communicated with the water inlet; a vibrating wire dust removal plate is arranged in the air inlet barrel, and a pneumatic fan is coaxially arranged in the fan barrel. When in use, the device is respectively arranged at the left and right walking parts of the coal mining machine body to realize nearby dust removal, effectively reduce coal dust dissipation and achieve high dust removal efficiency. The device adopts negative-pressure spraying, the vibrating wire dust removal plate is matched with the fan to realize dust removal, the dust removal efficiency is high, and the effect is good. An air outlet of the device is matched with a silencer, and noise of the fan is effectively reduced. And the sewage is discharged to the toothed rail of the scraper conveyer through a special pipeline, so that the cleaning and lubricating effects are achieved, coal powder and dirt are treated without shutdown, the operation efficiency is further improved, and the operation environment is remarkably improved.

The invention discloses a silencer, a silencer assembly and a server, which are applied to the technical field of silencer structures and used for solving the problem that noise affects the performance of a mechanical hard disk, and the silencer comprises a shell which comprises a first cylinder body and a hollow cylinder bottom arranged at one end of the first cylinder body; the inner shell comprises a second barrel and a sound cavity wall arranged on the periphery of the second barrel, and a through hole penetrating through the wall thickness of the second barrel is formed in the second barrel; the base is connected with at least one of the first barrel and the second barrel and located at the end, away from the barrel bottom, of the silencer; the inner shell is arranged in the outer shell, the end, away from the cylinder bottom, of the outer shell is connected with the inner shell, the sound cavity wall is attached to the inner wall of the outer shell, and a noise reduction cavity is formed in the space between the inner shell and the outer shell. Noise generated by rotation of the fan enters the noise reduction cavity through the inner hole of the inner shell to be consumed, the noise of the fan can be optimized through the silencer, and the influence of the noise on the performance of the mechanical hard disk is reduced.

The invention relates to an air conditioner, an oxygen generation control method and electronic equipment in the technical field of air conditioners. The air conditioner comprises an indoor unit, an outdoor unit and an oxygen generator. According to the technical scheme, the compressor on the oxygen generator works to provide strong suction force for indoor fresh air introduction, the compressor on the oxygen generator works to provide power for indoor fresh air introduction, under the condition, the fan part of the indoor unit can blow out fresh air indoors without running at a high rotating speed, and the design reduces the fan noise of the indoor unit to a large extent. The oxygen generating part of the oxygen generator works, so that the generated oxygen enters the oxygen inlet from the oxygen outlet and is exhausted into a room from the air outlet, the oxygen generator is used under the condition that the outdoor air content is relatively low, and the oxygen generating part of the oxygen generator works to generate oxygen, so that the indoor oxygen concentration is effectively increased; by means of the design, the air conditioner can be suitable for being used under the condition that the outdoor air content is low, and the use range of the air conditioner is widened.

The invention discloses a fan noise control method, device and system and an air conditioner, and belongs to the field of fan noise control. The draught fan noise control method comprises the steps that when it is determined that the noise of a draught fan is unqualified, the noise peak frequency of the noise is obtained; determining the noise type of the noise based on the noise peak frequency; and the fan blade angle is adjusted based on the noise type. According to the scheme, when the fan noise is unqualified, different types of noise can be determined based on the noise peak frequency, and then the fan blade angle is adjusted by adopting different adjusting modes according to the different types of noise, so that when the noise is unqualified, the fan blade angle can be adjusted in a targeted manner based on the different types of noise, adjustment can be performed in time, and the fan blade angle adjusting efficiency is improved. And a sound wave generator is not needed, the cost is low, the method can be suitable for various use scenes, and the use experience of a user is not affected.

The invention relates to the technical field of fan noise reduction, in particular to a low-vibration-noise volute for a small fan. The volute adopts a horizontal mounting mode, and the motor flange is connected with the volute polyurethane flange, so that the transmission of motor vibration to the volute is blocked. Air flow enters the volute from the impeller, then enters the sub air ducts between the flow guide plates, flows between the flow guide plates and is discharged from the outlet of the volute, more sub air duct exhaust air is provided for the air flow, the disorder of the air flow is reduced, and the impact of the air flow on the upper coaming and the lower coaming of the volute is reduced.

The invention discloses a low-noise energy-saving fan, and relates to the technical field of fan noise reduction, the low-noise energy-saving fan comprises two sets of lubricating structures, each lubricating structure comprises a circular ring pipe, the circular ring pipes are matched and aligned with corresponding bearings, and a plurality of nozzles are circumferentially distributed on the sides, close to the corresponding bearings, of the circular ring pipes; the two circular ring pipes are both communicated with a flow dividing pipe, the flow dividing pipe is communicated with a connecting pipe, the connecting pipe is connected with a storage pipe in a matched mode, the side face of the storage pipe is provided with an oil storage structure, the end of the storage pipe is connected with an oil supply structure in a matched mode, the oil storage structure comprises an oil storage tank, and the oil storage tank is fixedly connected to the inner wall of the cover body. Lubricating oil is fed into the storage pipe in the oil supply structure through the oil storage structure, the oil supply structure can automatically feed the lubricating oil into the connecting pipe every time the fan is started, and the lubricating oil enters the corresponding circular ring pipe through the flow dividing pipe and is sprayed to the corresponding bearing from the nozzle.

The utility model discloses a notebook computer automation test assembly line, which comprises a code scanning connection station, a horn test device, a fan noise test device and a microphone test device which are sequentially arranged along a product circulation direction, and is characterized in that the code scanning connection station is used for calibrating the position and the opening and closing angle of a notebook computer and can scan the code of the notebook computer; the loudspeaker test equipment is used for testing loudspeaker performance and keyboard resonance performance of the notebook computer, and the fan noise test equipment is used for testing noise conditions of a cooling fan of the notebook computer; a material receiving assembly is arranged on one side of the microphone testing device, and the microphone testing device is used for testing the microphone performance and the microphone air tightness of the notebook computer and sending the tested notebook computer to the material receiving assembly. According to the utility model, an assembly line type operation mode is adopted, manual transfer is not needed, multiple test operations of the notebook computer can be completed at the same time, the labor cost of the test is reduced, and the test efficiency can be greatly improved.

The utility model relates to the technical field of fan noise reduction, in particular to an impeller, a fan and a cleaning device, the impeller comprises a seat body and fan blades, the seat body is provided with a top surface and a curved surface, and the curved surface surrounds the top surface and intersects with the top surface. And one end of each fan blade is connected with the seat body and extends on the curved surface. According to the impeller, generated noise can be reduced.

The utility model discloses a fire-fighting high-temperature-resistant mixed-flow fan noise reduction structure which comprises a cylindrical machine shell, a motor frame is fixed on the inner side wall of the machine shell, a driving motor is fixed on the motor frame, a driving impeller is fixed on an output shaft of the driving motor, a flange edge extending in the radial direction is formed on the outer side wall of the left end of the machine shell, and the outer side wall of the right end of the machine shell is provided with an impeller. The outer side wall of the machine shell is sleeved with an outer sleeve in an inserted mode, the left end of the outer sleeve is fixedly connected to the outer side wall of the left portion of the machine shell through a bolt or a rivet, the right end of the outer sleeve is fixedly connected to the outer side wall of the right portion of the machine shell through a bolt or a rivet, and the right end of the outer sleeve is provided with a right flange edge extending outwards in the radial direction; the outer sleeve is directly inserted in the outer side wall of the machine shell in a sleeved mode and is fixed through bolts or rivets, and therefore installation is easy, efficiency is high, and the effect is good.

The present invention discloses a Roots blower with a guide device, comprising a casing, the casing is provided with an air inlet and an exhaust port, the air inlet is provided with an air inlet guide cone, an air inlet flow channel is formed between the air inlet guide cone and the inner wall of the air inlet, the exhaust port is provided with an air outlet guide cone, an air outlet flow channel is formed between the air outlet guide cone and the inner wall of the exhaust port, an exhaust cavity with openings at both ends is provided inside the air outlet guide cone, an exhaust hole connected to the exhaust cavity is provided on the casing, the air inlet guide cone and the exhaust guide cone have concave arc surfaces on the side facing the impeller, and a limit protection valve is provided on the side facing the impeller of the air outlet guide cone. By providing the guide cone, a longer flow channel can effectively delay the reflux process of high-pressure gas, and even if the gas enters the volume formed by the impeller and the casing along the flow channels on both sides of the two guide cones, the generation of gas turbulence can be effectively avoided, thereby solving the problem of high noise of the current blower.

The invention relates to an air conditioner outdoor unit with an active noise reduction function, an air conditioner and an active noise reduction method, and relates to the technical field of air conditioners. The air conditioner outdoor unit comprises a machine shell; the fan is arranged in the machine shell; the compressor is arranged in the machine shell; the sound collection module is arranged in the machine shell, is close to the fan and the compressor and is used for collecting a first sound signal; the first sound signal comprises at least one of compressor noise and fan noise; the control module is connected with the sound acquisition module and is used for determining a noise total value and a noise peak value of the first sound signal and generating a control electric signal according to a comparison result of the noise total value and the noise peak value; the piezoelectric braking module is arranged on the machine shell, is connected with the control module and is used for generating deformation under the action of the control electric signal so as to drive the machine shell to vibrate, and a reverse sound wave signal generated by the vibrating machine shell is used for weakening the first sound signal. The air conditioner outdoor unit can achieve active noise reduction.

The present disclosure relates to a method and device for acoustically imaging fan noise, an electric vehicle charging pile, and a storage medium. The method comprises: acquiring a noise time-domain signal generated by a fan when the fan is running; performing time-frequency conversion on the noise time-domain signal based on a short-time Fourier transform algorithm to obtain a noise frequency-domain signal; inputting the noise frequency-domain signal into a delay-and-sum beamformer to perform beamforming to obtain beam data; positioning principal component data of the beam data to obtain sound power data; and generating a sound image containing a sound source position according to the sound power data. In this embodiment, the resolution of the noise can be improved by positioning the principal component of the beam data, which achieves the effect of accurately positioning the sound source position and is conducive to obtaining a more accurate sound image.

The present invention discloses a muffler, a muffler assembly and a server, which are applied to the technical field of muffler structure, and are used to solve the problem that noise affects the performance of mechanical hard disks. The muffler comprises: an outer shell, comprising a first cylinder and a hollow cylinder bottom arranged at one end of the first cylinder; an inner shell, comprising a second cylinder and a sound cavity wall arranged at the outer periphery of the second cylinder, and the second cylinder is provided with a through hole penetrating its wall thickness; a base, connected to at least one of the first cylinder and the second cylinder, and located at the end of the muffler away from the cylinder bottom; the inner shell is arranged in the outer shell, and the end of the outer shell away from the cylinder bottom is connected to the inner shell, and the sound cavity wall is fitted with the inner wall of the outer shell, so that the space between the inner shell and the outer shell forms a muffler. The noise generated by the rotation of the fan enters the muffler cavity through the inner hole of the inner shell for consumption. The use of the muffler can optimize the fan noise and reduce the influence of the noise on the performance of the mechanical hard disk.

The application provides a duct fan noise circumferential acoustic mode detection method based on a genetic algorithm, utilizes the characteristics of acoustic mode sparsity, solves an inverse problem model of circumferential acoustic mode recognition in a duct, solves an underdetermined equation set through an optimization mode with the aid of measurement values of a small number of sensor measuring points, realizes accurate reconstruction of a main mode order and amplitude under a sub-Nyquist sampling rate condition, solves the problems of a traditional detection method based on a uniform microphone array, such as system complexity and high cost, and improves mode recognition accuracy compared with an l1 norm sparse regularization compressed sensing method.

This invention discloses a broadband duct silencing structure combining perforated tubes and cavities. The structure uses a galvanized housing as its main body, with perforated tubes coaxially arranged inside. A perforated partition divides the structure into front and rear silencing chambers. The front silencing chamber contains a first sound absorber and an air layer, forming a Helmholtz resonant cavity to efficiently eliminate low-frequency fan noise. The rear silencing chamber is filled with a second sound absorber and is equipped with perforated tubes, micro-perforated tubes, and micro-perforated inserts with progressively smaller apertures, forming a gradient microporous structure to achieve broadband absorption of mid-to-high frequency noise. The structure utilizes the airflow in the duct to drive the impeller to rotate, which in turn drives a bidirectional reciprocating screw via bevel gear transmission. This drives a delivery rod and a one-way valve to form a directional airflow circulation. The sound absorber is automatically purged through the air duct and comb-shaped air duct to remove fiber dust, preventing secondary pollution and stabilizing acoustic performance. This invention combines the advantages of low-frequency resonance silencing and mid-to-high frequency gradient microporous sound absorption, featuring a compact structure, wide silencing bandwidth, and stable and reliable operation.

This invention relates to a range hood, comprising: a body, a baffle plate, and a fan cabinet. The body has an internal smoke collection chamber and includes a front panel and a top panel connected to the front panel. An air inlet is located at the bottom of the front panel, and an air outlet is located on the top panel. When the range hood is operating, the fan cabinet provides suction, causing the cooking fumes in the kitchen space to enter the first chamber through the air inlet, then enter the air intake side of the fan cabinet, and are discharged outwards into the common flue through the air outlet and the air outlet. During normal use, the air in the second chamber is blocked by the baffle plate from entering the first chamber, thus preventing turbulence with the air entering the fan cabinet from the air inlet. This allows the fan cabinet to concentrate the smoke intake from the air inlet, optimizing the smoke extraction effect and reducing the fan cabinet's operating frequency, thereby reducing fan noise and saving energy.

The application provides a device heat dissipation adjustment device and a VR device. The device comprises a noise detection module and a heat dissipation control module. The noise detection module and the heat dissipation control module are in communication connection. The noise detection module detects the environmental noise of the environment where the device is located and the fan noise generated by the heat dissipation fan, and sends the environmental noise and the fan noise to the heat dissipation control module. The heat dissipation fan is arranged in the device to dissipate heat of the device. The heat dissipation control module adjusts the rotating speed of the heat dissipation fan according to the environmental noise and the fan noise. Compared with the prior art, the device heat dissipation adjustment device can adjust the rotating speed of the heat dissipation fan according to the environmental noise and the fan noise generated by the heat dissipation fan, so that the device reaches a balance between user experience and heat dissipation noise by dynamically adjusting the rotating speed of the heat dissipation fan, thereby enabling the user to obtain a better experience.

The utility model belongs to the technical field of medical equipment, and particularly discloses a mounting structure for reducing noise of a fan of a breathing machine, which comprises a fan, a shell and a fan seat, a mounting groove is arranged at the bottom of the shell, and a first air guide groove matched with the fan is arranged on the side edge of the shell; the fan is mounted in the fan seat, and the fan seat is mounted in the mounting groove through a buffer part; a sound absorption cover is fixedly connected to the inner wall of the periphery of the fan base. When the breathing machine works, noise caused by airflow or vibration of the fan is reduced, the comfort level of a user is improved, and meanwhile, the shell outer cover and the detachable filter screen cover body are arranged, so that the filter screen is convenient to replace.

The utility model relates to the technical field of ventilation treatment, and discloses a ventilation component and ventilation treatment equipment. The ventilation component is used for being arranged in the ventilation treatment equipment and comprises a ventilation pipe body (11), a curve air channel (111) used for prolonging an airflow circulation path is defined in the ventilation pipe body (11), and an air inlet (112) of the air channel (111) is used for being correspondingly communicated with a main machine air inlet (22) of the ventilation treatment equipment. And an air outlet (113) of the air passage (111) is used for being correspondingly communicated with an air inlet of a fan (21) in the ventilation treatment equipment. According to the ventilation component provided by the utility model, the curved air channel is arranged in the ventilation component to guide the air flow to flow and prolong the air flow flowing path, so that on one hand, the effect of extending the air path can be realized through three-dimensional folding in a smaller space, and on the other hand, the noise of a fan can be prevented from being transmitted out, thereby realizing the purposes of flow stabilization and noise reduction.

The embodiment of the application discloses a fan noise reduction method and device, electronic equipment and computer readable storage medium, and belongs to the technical field of noise reduction. The method comprises the following steps: obtaining running state information and running condition information of a target fan; identifying the running state information to obtain noise source information; determining a target control parameter based on the noise source information and the running condition information; and performing noise reduction processing on the target fan based on the target control parameter. In this way, by accurately identifying the noise source information in the running state information of the target fan, the appropriate target control parameter can be determined in combination with the running condition information, the targeted noise reduction processing of the target fan is realized while ensuring the stable operation of the target fan, thereby effectively improving the noise reduction effect and improving the quiet comfort of the user.