Air conditioner noise reduction method, medium, program product, equipment, system and vehicle

Abstract

The invention discloses an air conditioner noise reduction method, a medium, a program product, equipment, a system and a vehicle, and relates to the technical field of vehicles. The air conditioner noise reduction method comprises the step of executing noise reduction operation according to the working mode of the air conditioner. The air conditioner has different working devices in different working modes, so that the reasons for generating the noise of the air conditioner in different working modes are also different. The noise reduction operation is executed according to the working mode of the air conditioner, and the mode of the noise reduction operation can be matched with the reason for generating the noise of the air conditioner, so that the noise reduction operation is executed in a targeted mode, the noise of the air conditioner is effectively reduced, and the noise reduction effect and the noise reduction efficiency are improved.

Description

Technical Field

[0001] This application relates to the field of air conditioning noise reduction technology, and in particular to an air conditioning noise reduction method, medium, program product, equipment, system and vehicle. Background Technology

[0002] With the development of new energy vehicle technology, users' demand for a quiet cabin is increasing. The noise from the vehicle's air conditioning system is a major source of cabin noise. Related technologies employ active noise cancellation or passive sound insulation to reduce this noise. However, these noise reduction methods are simplistic and their effectiveness is limited. Summary of the Invention

[0003] This application provides an air conditioning noise reduction method, medium, program product, equipment, system, and vehicle, which can improve noise reduction efficiency and effect, and at least partially solve the above-mentioned technical problems.

[0004] To achieve the above objectives, according to a first aspect of this application, an air conditioning noise reduction method is provided, comprising: performing a noise reduction operation according to the operating mode of the air conditioner.

[0005] Optionally, the operating mode includes any one of the following: cooling mode, heat pump heating mode, and PTC heating mode.

[0006] Optionally, the step of performing noise reduction operation according to the air conditioner's operating mode includes: performing noise reduction operation according to the air conditioner's operating mode when the ambient sound data meets the first condition.

[0007] Optionally, the first condition includes: the sound frequency of the ambient sound data is less than or equal to a preset frequency.

[0008] Optionally, performing noise reduction operation according to the air conditioner's operating mode includes: generating interference data according to the operating mode; wherein the interference data is used to cancel at least a portion of the noise data generated by the air conditioner.

[0009] Optionally, generating interference data based on the operating mode includes: determining the interference data based on the operating mode, vibration data, and aerodynamic data.

[0010] Optionally, the vibration data includes at least one of the following: vibration data of the compressor and vibration data of the blower.

[0011] Optionally, the pneumatic data includes: pneumatic data of the air conditioning outlet duct.

[0012] Optionally, determining the interference data based on the operating mode, vibration data, and aerodynamic data includes: when the operating mode is a cooling mode or a heat pump heating mode, performing cross-correlation processing on the ambient sound data, vibration data, and aerodynamic data to obtain characteristic data of the air conditioning noise data; and generating the interference data based on the characteristic data.

[0013] Optionally, the air conditioner noise data includes compressor noise data; generating the interference data based on the feature data includes: when the operating mode is the heat pump heating mode, determining a first proportion of the compressor noise data in the air conditioner noise data based on the feature data; and updating the vibration data when the first proportion is greater than a preset proportion, so as to update the interference data based on the updated vibration data.

[0014] Optionally, determining the interference data based on the operating mode, vibration data, and aerodynamic data includes: when the operating mode is PTC heating mode, determining the interference data based on the vibration data and aerodynamic data using an adaptive filtering algorithm.

[0015] In a second aspect, a computer-readable storage medium is also provided, on which a computer program or instructions are stored, which, when executed by a processor, implement the air conditioning noise reduction method as proposed in the first aspect.

[0016] Thirdly, a computer program product is also provided, including a computer program or instructions that, when executed by a processor, implement the air conditioning noise reduction method as proposed in the first aspect.

[0017] Fourthly, an electronic device is also provided, comprising: a memory storing a computer program or instructions thereon; and a processor for executing the computer program or instructions in the memory to implement the air conditioning noise reduction method as proposed in the first aspect.

[0018] Fifthly, an air conditioning noise reduction system is also provided, including: a controller, which is used to perform noise reduction operation according to the working mode of the air conditioner.

[0019] Optionally, the system further includes: a vibration sensor for acquiring vibration data; a first sound sensor for acquiring aerodynamic data; the controller is further configured to: determine interference data based on the operating mode, the vibration data, and the aerodynamic data; wherein the interference data is used to cancel at least a portion of the noise data generated by the air conditioner.

[0020] Optionally, the vibration sensor includes an accelerometer.

[0021] Optionally, the vibration sensor is disposed in a first area of ​​the compressor housing and / or in a second area of ​​the blower motor.

[0022] Optionally, the first sound sensor includes a first microphone.

[0023] Optionally, the first sound sensor is disposed in a third area between the air conditioning duct and the air outlet grille.

[0024] Optionally, the system further includes a second sound sensor for acquiring ambient sound data.

[0025] Sixthly, a vehicle is also provided, including electronic equipment as described in the fourth aspect above, or including an air conditioning noise reduction system as described in the fifth aspect above.

[0026] Optionally, the air vent of the vehicle extends through in a first direction; the vehicle includes a grille extending in the first direction, the grille being configured to define the air vent.

[0027] Optionally, the spacing between adjacent grilles along the second direction ranges from 5mm to 20mm, the size of the grille along the second direction ranges from 0.5mm to 2mm, and the second direction intersects with the first direction.

[0028] In summary, the technical solution provided in this application performs noise reduction operations based on the air conditioner's operating mode. Since the components operating in different modes vary, the causes of air conditioner noise also differ. By performing noise reduction operations according to the air conditioner's operating mode, this application adapts the noise reduction method to the cause of the air conditioner noise, thereby achieving targeted noise reduction, effectively reducing air conditioner noise, and improving noise reduction effect and efficiency. Furthermore, by performing corresponding noise reduction operations based on different operating modes, this application provides diverse methods for reducing air conditioner noise, further enhancing the effectiveness of the noise reduction operation. Attached Figure Description

[0029] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0030] Figure 1 This is a flowchart of an air conditioning noise reduction method provided in an embodiment of this application;

[0031] Figure 2 This is a flowchart of another air conditioning noise reduction method provided in the embodiments of this application;

[0032] Figure 3 This is a flowchart of another air conditioning noise reduction method provided in the embodiments of this application;

[0033] Figure 4 This is a schematic diagram of an air conditioning noise reduction system provided in an embodiment of this application.

[0034] Figure 5 A schematic diagram of a vehicle provided for an embodiment of this application;

[0035] Figure 6 This is a schematic diagram of a vehicle's air vent, provided as an embodiment of this application. Detailed Implementation

[0036] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0037] In the description of this application, it should be understood that the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, features defined as "first" or "second" may explicitly or implicitly include one or more of the stated features. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.

[0038] The use of "applies to" or "configured to" in this application implies open and inclusive language, which does not exclude the applicability to or configuration to devices performing additional tasks or steps. Additionally, the use of "based on" implies openness and inclusivity, because processes, steps, calculations, or other actions "based on" one or more of the stated conditions or values ​​may in practice be based on additional conditions or values ​​beyond those stated.

[0039] In this application, the term "exemplary" is used to mean "used as an example, illustration, or description." Any embodiment described as "exemplary" in this application is not necessarily to be construed as being more preferred or advantageous than other embodiments. The following description is provided to enable any person skilled in the art to make and use this application. Details are set forth in the following description for purposes of explanation. It should be understood that those skilled in the art will recognize that this application can be made without using these specific details. In other instances, well-known structures and processes are not described in detail to avoid obscuring the description of this application with unnecessary detail. Therefore, this application is not intended to be limited to the embodiments shown, but is consistent with the broadest scope of the principles and features disclosed in this application.

[0040] The noise from vehicle air conditioning is one of the main sources of noise in the vehicle cabin, and noise reduction of vehicle air conditioning is the main way to improve the quietness of the cabin. Traditional air conditioning noise reduction methods are singular, while air conditioning noise is caused by a variety of factors, and the noise characteristics produced by different causes are different. Using a single noise reduction method cannot adapt to all noise reduction situations, resulting in low noise reduction efficiency and poor noise reduction effect.

[0041] In view of this, embodiments of this application provide an air conditioning noise reduction method, medium, program product, device, system, and vehicle, which can improve noise reduction efficiency and effect.

[0042] In a first aspect, embodiments of this application provide an air conditioning noise reduction method.

[0043] Please see Figure 1 , Figure 1 This is a schematic flowchart of an air conditioning noise reduction method provided in an embodiment of this application. Figure 1 As shown, the air conditioner noise reduction method may include the following steps S100.

[0044] Step S100: Perform noise reduction operation according to the air conditioner's operating mode.

[0045] An air conditioner, or air conditioner, is a device used to adjust the temperature, humidity, and airflow of a space. Air conditioner operating modes include cooling mode, heating mode, dehumidification mode, fan mode, and defrost mode. Cooling mode lowers the indoor temperature by absorbing heat from the room and releasing it outdoors through refrigerant circulation; heating mode raises the indoor temperature by transferring heat from the outside to the inside; dehumidification mode reduces indoor humidity by lowering the air temperature, causing water vapor to condense into water droplets; fan mode changes indoor temperature and humidity through air circulation; and defrost mode, in heating mode when the outdoor heat exchanger is frosted over, defrosts the outdoor heat exchanger to ensure normal operation of the air conditioner.

[0046] Noise generated by air conditioners can be caused by the flow of gas, vibrations of the air conditioning components, or the operation of these components when powered on. Noise from gas flow can arise from turbulence or airflow cutting through obstacles such as grilles and blades during operation; this noise is generally related to airflow velocity. Noise from component vibration can be caused by gear meshing or compressor piston movement during operation; this noise is related to the rotational speed of the machinery. Noise from powered components is generated by the expansion and contraction of magnetic materials or the vibration of conductors when electromagnetic components such as motors operate; this electromagnetic noise is related to the alternating magnetic field corresponding to the electromagnetic component.

[0047] Because air conditioners utilize different components in different operating modes, the causes of air conditioner noise also differ depending on the mode. This application embodiment performs noise reduction operations based on the air conditioner's operating mode, allowing the noise reduction method to be adapted to the cause of the noise, thereby achieving targeted noise reduction, effectively reducing air conditioner noise, and improving noise reduction effect and efficiency. Furthermore, this application embodiment provides diverse methods for reducing air conditioner noise by performing corresponding noise reduction operations based on different operating modes, further enhancing the effectiveness of the noise reduction operation.

[0048] In some embodiments, performing noise reduction operations according to the operating mode of the air conditioner includes: generating interference data according to the operating mode; wherein the interference data is used to cancel at least a portion of the noise data generated by the air conditioner.

[0049] This application embodiment performs noise reduction on the air conditioner by generating interference data. Specifically, the interference data cancels out at least a portion of the noise data generated by the air conditioner, thereby suppressing and eliminating noise. The interference data can be a sound wave with the opposite phase to the noise data. By superimposing the interference data and the noise data, they can cancel each other out, achieving noise reduction.

[0050] Air conditioners utilize different components in different operating modes, resulting in varying causes of noise data generation. This application's embodiments can determine the components operating in a given operating mode and the noise characteristics of the noise data generated under that mode, thereby generating corresponding interference data for that mode. Compared to single noise reduction methods, this application's embodiments can specifically generate noise data based on different operating modes, improving noise reduction efficiency and effectiveness.

[0051] In some embodiments, generating interference data based on an operating mode includes determining the interference data based on the operating mode, vibration data, and aerodynamic data.

[0052] The noise data generated by the air conditioner mainly includes noise generated by component vibration and noise generated by gas flow. In this embodiment of the application, when eliminating noise generated by component vibration, the current operating mode of the air conditioner is first determined, and then vibration data generated by component vibration and aerodynamic data generated by gas flow are collected under the current operating mode. Interference data is generated based on the vibration data and aerodynamic data of the current operating mode to achieve noise reduction.

[0053] For example, vibration data could be data related to motor rotation, gear meshing, and compressor piston operation during air conditioner operation. Pneumatic data could be data related to airflow generated by the air conditioner, such as airflow velocity, gas flow rate, and the sound of airflow.

[0054] In some embodiments, the vibration data includes at least one of the following: vibration data of the compressor and vibration data of the blower.

[0055] Air conditioner operation mainly relies on the compressor and blower. During operation, the compressor and blower generate low-to-medium frequency noise due to mechanical vibration. This application's embodiments collect vibration data from at least one of the compressor and blower, and then, based on the analysis of the vibration data, determine the vibration noise generated by the vibration data, and accordingly obtain interference data to eliminate the vibration noise.

[0056] In some embodiments, vibration data is acquired via a vibration sensor.

[0057] A vibration sensor is a sensor used to collect vibration data. It can determine the vibration state of an object by measuring vibration quantities such as vibration acceleration, vibration velocity, and vibration displacement. Compared to directly collecting noise generated by vibration using a sound sensor, this embodiment of the application identifies vibration-induced noise by collecting and analyzing vibration data, resulting in more accurate noise data and thus higher accuracy and precision in noise reduction.

[0058] In some embodiments, the vibration sensor includes an accelerometer.

[0059] Accelerometers can respond uniformly and accurately to vibration signals over a wide frequency range, exhibiting strong anti-interference capabilities. They can be used to acquire vibration data ranging from low-frequency vibration signals of tens of hertz to high-frequency vibration data of tens of thousands of hertz. Furthermore, accelerometers are small in size and consume little power, making them easy to embed in devices or deploy in a distributed manner.

[0060] For example, embodiments of this application can use a triaxial vibration sensor to collect vibration data of the compressor and the blower. The triaxial vibration sensor can simultaneously measure the vibration acceleration or velocity of an object in three mutually perpendicular directions and convert the collected signals into electrical signals for output. The sensitivity of the triaxial vibration sensor can be greater than 100mV / g, and the frequency response is from zero to 10kHz. It can be magnetically or bolted to the middle of the compressor housing to collect compressor vibration data, and fixed to areas of concentrated vibration energy such as the blower motor bearings to collect structural vibration noise caused by blower speed fluctuations, component resonance, etc.

[0061] In some embodiments, the pneumatic data includes: pneumatic data of the air conditioning outlet duct.

[0062] When an air conditioner is running, a compressor generates cold or hot air, which is then transported to the outside of the air conditioner by a blower. The air generated by the air conditioner is guided by the air outlet duct and can be evenly distributed to various areas. This embodiment of the application, by collecting data on the airflow within the air outlet duct, can determine the noise data generated by the gas flow and correspondingly obtain interference data to eliminate the noise generated by the airflow.

[0063] In some embodiments, pneumatic data is acquired via a first sound sensor.

[0064] A sound sensor is a sensor used to collect sound signals. In this embodiment, the sound sensor directly collects the sound generated when air flows in an air conditioner due to turbulent airflow or when the gas encounters obstacles, thus obtaining aerodynamic data of the gas flow in the air conditioner.

[0065] In some embodiments, the first sound sensor includes a first microphone.

[0066] The microphone has high sensitivity, capable of detecting minute changes in sound pressure level, and works effectively even in low signal-to-noise ratio environments. It typically has a wide frequency response range, enabling it to capture aerodynamic noise at various frequencies. Furthermore, its small size and light weight make it easy to install and capture aerodynamic data from different locations.

[0067] In some embodiments, the operating modes include: cooling mode, heat pump heating mode, and PTC heating mode.

[0068] The air conditioner operating modes in this application embodiment mainly include a cooling mode for cooling and a heating mode for heating. In cooling mode, a compressor generates cold air, which is then delivered to the vehicle cabin via a blower and air duct. In heating mode, different heating modes can be included based on the heating principle, such as PTC heating mode and heat pump heating mode. PTC heating mode achieves heating through a PTC heater, which is a heating element including a positive temperature coefficient thermistor. When the PTC heater is powered on, its resistance increases through self-heating and it enters a steady state, thereby achieving constant temperature heating. Heat pump heating mode is similar to cooling mode, also generating hot air through a compressor; however, the noise generated in heat pump heating mode has a different frequency than that generated in cooling mode. Different operating modes correspond to different operating devices, resulting in differences in the frequency band and sound pressure level of the generated noise.

[0069] For example, in cooling mode, the air conditioner mainly operates through the compressor and blower. The operation of the compressor and blower generates low-to-medium frequency noise, including mechanical vibration. Therefore, in cooling mode, vibration sensors can be placed on the compressor and blower to collect vibration data, and sound sensors can be placed on the air outlet duct to collect aerodynamic data. The operating principle of the air conditioner in heat pump heating mode is similar to that in cooling mode, mainly involving the compressor and blower, which generate noise. Similarly, vibration sensors need to be placed on the compressor and blower to collect vibration data, and sound sensors on the air outlet duct to collect aerodynamic data. In PTC heating mode, heat is generated by the PTC heater, and the compressor does not need to operate. Therefore, the noise in PTC heating mode mainly comes from the blower. Thus, only vibration sensors need to be placed on the blower to collect vibration data, and sound sensors on the air outlet duct to collect aerodynamic data.

[0070] In some embodiments, the operating mode of the air conditioner can be determined by obtaining the air conditioner mode signal through the vehicle's Controller Area Network (CAN) bus.

[0071] According to the different operating modes of the air conditioner, the embodiments of this application can more specifically acquire different vibration and aerodynamic data, thereby improving the accuracy and efficiency of air conditioner noise acquisition.

[0072] In some embodiments, the air conditioning noise reduction method of this application further includes: performing noise reduction operation according to the working mode of the air conditioner when the ambient sound data meets the first condition.

[0073] Ambient sound data represents the sound data of the gas distribution area after air conditioning treatment. Ambient sound data can be used to determine the noise characteristics of the environment, such as noise frequency and noise level.

[0074] Air conditioners generate noise data at different frequencies during operation, and the sound pressure levels corresponding to different frequencies are also different. This application's embodiment performs noise reduction operations based on the air conditioner's operating mode, including generating interference data based on the air conditioner's operating mode to cancel out at least a portion of the noise data; this is considered active noise reduction. High-frequency noise has a shorter wavelength, and phase mismatch may occur when generating interference data corresponding to high-frequency noise.

[0075] In this embodiment of the application, before noise reduction, the noise in the environment can be determined based on the ambient sound data. If the ambient sound data meets the first condition, the noise reduction operation is then performed according to the working mode of the air conditioner, so as to improve the accuracy and reliability of the air conditioner noise reduction and improve the noise reduction effect of the air conditioner.

[0076] In some embodiments, the first condition includes: the sound frequency of the ambient sound data is less than or equal to a preset frequency.

[0077] A preset frequency is used to distinguish the components of ambient sound data. For example, if the ambient sound data is higher than the preset frequency, it is considered that the current environment mainly contains high-frequency noise; if the ambient sound data is lower than or equal to the preset frequency, it is considered that the current environment mainly contains mid-to-low-frequency noise. This application embodiment classifies ambient sound data based on a first condition. For mid-to-low-frequency noise in the ambient sound data, active noise reduction is performed by generating interference data, thereby improving the noise reduction efficiency and accuracy of the air conditioner.

[0078] In some embodiments, when the frequency of the ambient sound data is higher than a preset frequency, i.e., the current environment is mainly filled with high-frequency noise, noise reduction can be achieved by adjusting the air outlet structure or using sound insulation materials. For example, adjusting the air outlet structure can improve the hydrodynamic performance of the air outlet channel by increasing its longitudinal length and cross-sectional area, or reducing the number of grilles. For instance, merging multiple air outlets into a single large outlet allows the air generated by the air conditioner to flow more smoothly out of the outlet, reducing turbulence and friction during airflow, thereby reducing the generation of high-frequency noise.

[0079] The sound frequency of ambient sound data can be calculated using an A-weighted boost level. For example, after the microphone is activated, it transmits the collected data to the Digital Signal Processing (DSP) unit via an A2B (Audio to Bus) harness. The DSP then performs noise reduction processing based on the data acquired by the sensor. The data signal processing chip uses its built-in FFT (Fast Fourier Transform) algorithm to calculate in real time the A-weighted sound pressure level difference between the frequency bands above 1000Hz and below 1000Hz in the noise source. This sound pressure level difference, ΔL = L_high - L_low, is measured in dB(A). When ΔL is greater than 20 dB(A), it indicates that high-frequency noise energy accounts for more than 75%, and the air conditioning noise is mainly aerodynamic high-frequency noise. In this case, optimizing the air outlet structure can reduce high-frequency noise by 60%. When ΔL is less than or equal to 20 dB(A), it indicates that mid-to-low frequency noise dominates, mainly mechanical vibration noise and aerodynamic low-frequency noise, requiring suppression by an active noise cancellation system.

[0080] In some embodiments, determining interference data based on the operating mode, vibration data, and aerodynamic data includes: when the operating mode is cooling mode or heat pump heating mode, performing cross-correlation processing on ambient sound data, vibration data, and aerodynamic data to obtain characteristic data of air conditioning noise data; and generating interference data based on the characteristic data.

[0081] Noise in both cooling and heat pump heating modes is primarily generated by the compressor and blower. Vibration data collected by vibration sensors includes vibration data from both the compressor and the blower. By cross-correlation processing of the vibration data, aerodynamic data, and ambient sound data corresponding to the operating modes, characteristic data of the air conditioning noise is obtained, and interference data is generated based on these characteristic data.

[0082] For example, in cooling mode, the noise frequency generated by the compressor and blower due to vibration is relatively higher than in heat pump heating mode. Therefore, in cooling mode, it is necessary to focus on monitoring vibration data from 80Hz to 500Hz. By analyzing the vibration data, the fundamental frequency and harmonic components of the compressor speed are extracted to facilitate the subsequent generation of interference data based on the compressor's operating frequency data. It is understood that the aerodynamic data collected by the first sound sensor may contain interference signals. A bandpass filter can be used to process the aerodynamic data collected by the first sound sensor to filter out irrelevant interference signals, such as vibration data below 80Hz or above 500Hz.

[0083] Ambient sound data can be acquired by setting up a second sound acquisition device next to the driver's seat. The ambient sound data collected by the second sound acquisition device is represented as x(t). x(t) includes air conditioning noise data, which includes mechanical vibration noise and aerodynamic noise during air conditioning operation, as well as other noise data such as driving noise from the outside. Vibration data collected from the air conditioning compressor and blower is represented as y1(t), and aerodynamic data collected from the air outlet duct is represented as aerodynamic data y2(t). The noise generated by vibration and the noise generated by aerodynamics are separated by cross-correlation processing.

[0084] For example, Fourier transforms are performed on x(t), y1(t), and y2(t) respectively to obtain the power spectrum |X(f)| of the ambient sound data. 2 The power spectrum of the vibration data |Y1(f)| 2 And the power spectrum of aerodynamic data |Y2(f)| 2 And the cross-power spectra S_xy1(f)=X*(f)·Y1(f) , S_xy2(f)=X*(f)·Y2(f), where * denotes conjugate, S_xy1(f) represents the cross-power spectrum of ambient sound data x(t) and vibration data y1(t), and S_xy2(f) represents the cross-power spectrum of ambient sound data x(t) and aerodynamic data y2(t). Then calculate γ for each frequency f. 2 _xy1(f) and γ 2 _xy2(f), the formula for calculating the related function can be γ 2 xy(f)=|S_xy(f)| 2 / (S_xx(f)·S_yy(f)).

[0085] The components of the environmental sound data can be determined based on the calculation results. If γ 2 _xy1(f)>γ 2 _xy2(f) and γ 2 If _xy1(f)≥0.7, it can be determined that the noise component of the environmental sound data x(t) at frequency f is mechanical vibration noise. If γ 2 _xy2(f)>γ 2 _xy1(f) and γ 2 If _xy2(f) ≥ 0.7, it is determined to be aerodynamic noise. If both are less than 0.7, it indicates that the environmental sound data is mainly other interference noise, such as external noise, and should be excluded.

[0086] After obtaining characteristic data such as noise type and frequency from the air conditioning noise data, a reverse control signal can be generated based on the characteristic data according to the fused noise model. This signal is then used to drive the in-vehicle speakers through a data amplifier to create a noise reduction zone around the driver and passengers. The noise model can be a model formed based on the analysis of vibration and aerodynamic data. The noise model can accurately identify the frequency, intensity, source, and dynamic characteristics of the noise based on the collected data, facilitating the generation of interference data.

[0087] In some embodiments, the air conditioner noise data includes compressor noise data; generating interference data based on feature data includes: when the operating mode is heat pump heating mode, determining a first proportion of compressor noise data in the air conditioner noise data based on feature data; and updating vibration data to update interference data based on the updated vibration data if the first proportion is greater than a preset proportion.

[0088] The sources of vibration and aerodynamic data acquired during noise reduction operations are basically the same for both heat pump heating and cooling modes. However, the compressor's operating frequency is lower in heat pump heating mode than in cooling mode. Therefore, in heating mode, it may be necessary to compensate for the low-frequency vibration data of the compressor in the vibration data to obtain updated vibration data. Based on this updated vibration data, updated feature data and updated interference data are then obtained. Finally, the updated interference data is used to cancel out noise data, improving the accuracy of noise reduction.

[0089] The air conditioner noise data includes compressor noise data. In this embodiment, the first proportion of compressor noise data in the air conditioner noise data can be determined by judging the proportion of compressor noise data in the total air conditioner noise data. If the first proportion is greater than a proportion threshold, for example, if the first proportion is greater than or equal to the proportion threshold of 40%, the vibration data of the compressor is updated by compensation.

[0090] For example, when updating vibration data, a transfer function model of the compressor bracket's natural frequency and the compressor noise data can be constructed. Based on the aforementioned cross-power spectrum calculation, the components of the noise data can be determined, and the primary proportion of the noise data generated by the compressor can be identified. If the analysis shows that the air conditioning noise data is mainly compressor noise data, compensation can be applied to the vibration data in the corresponding frequency band of the compressor. Simultaneously, the aerodynamic data can be further validated, filtering out external road noise and chassis vibration radiation noise, retaining only the air conditioning noise data.

[0091] For example, during the preprocessing stage of vibration data collected by vibration sensors, narrowband bandpass filters are set for the compressor vibration noise frequencies of 100-150Hz and 200-250Hz to filter out noise interference from other frequency bands such as the blower and chassis. Furthermore, the active noise reduction system can enhance the depth of low-frequency noise cancellation in the target frequency band by increasing the step size factor (μ) to improve dynamic tracking speed, increasing the filter order to improve spectrum fitting accuracy, and optimizing the secondary path model P(z) to correct anti-phase sound wave propagation deviation, thereby maximizing the noise reduction effect.

[0092] In some embodiments, interference data is determined based on the operating mode, vibration data, and aerodynamic data, including: when the operating mode is PTC heating mode, interference data is determined based on vibration data and aerodynamic data using an adaptive filtering algorithm.

[0093] In PTC heating mode, the compressor is not operating, reducing the high-frequency components in the air conditioner noise data. At this time, an adaptive filtering algorithm can be used to track the blower speed's fundamental frequency in real time. The Least Mean Squares (LMS) algorithm dynamically adjusts the filter coefficients based on real-time changes in the input signal, achieving a convergence speed of less than or equal to 200ms. Since PTC heating mode does not require processing of compressor vibration data, the power consumption of the air conditioning noise reduction system can also be reduced.

[0094] LMS is an adaptive filtering algorithm that minimizes the mean square error between the output signal and the desired signal by continuously adjusting the system parameters. In some embodiments, in addition to the LMS algorithm, recursive least squares (RLS), affine projection (AP) algorithms, etc., can also be used.

[0095] The steps of the air conditioning noise reduction method of this application embodiment will be described in detail below through a specific example.

[0096] Please see Figure 2 , Figure 2 This is a schematic flowchart of an air conditioning noise reduction method provided in an embodiment of this application. Figure 2 As shown, the air conditioner noise reduction method may include the following steps S210 to S290.

[0097] Step S210: Pre-set the vibration sensor and the pneumatic sensor.

[0098] The vibration sensors include vibration sensors for the compressor and vibration sensors for the blower. The pneumatic sensors include pneumatic sensors for the air outlet duct.

[0099] Step S220: Activate the air conditioning noise reduction system.

[0100] Step S230: Obtain the air conditioner's operating mode signal.

[0101] Step S240: Determine whether the air conditioner is in cooling mode.

[0102] If yes, proceed to step S260; otherwise, proceed to step S250.

[0103] Step S250: Determine whether the air conditioner is in heat pump heating mode.

[0104] If yes, proceed to step S260; otherwise, proceed to step S270.

[0105] Step S260: Turn on the vibration sensor of the compressor, the vibration sensor of the blower, and the pneumatic sensor.

[0106] Step S270: Turn off the compressor's vibration sensor and turn on the blower's vibration sensor and pneumatic sensor.

[0107] Step S280: Collect ambient sound data and obtain the sound frequency of the ambient sound data.

[0108] Step S290: Determine whether the sound frequency is greater than the preset frequency.

[0109] If the ambient sound frequency is less than or equal to the preset frequency, noise reduction is performed according to the air conditioner's operating mode. If the ambient sound frequency is greater than the preset frequency, the air outlet structure is optimized for noise reduction.

[0110] Please see Figure 3 , Figure 3 This is a schematic flowchart of an air conditioning noise reduction method provided in an embodiment of this application. Figure 3 As shown, performing noise reduction operation according to the air conditioner's operating mode includes the following steps S310 to S360.

[0111] Step S310: Determine the working mode.

[0112] If the operating mode is cooling mode, execute step S320; if the operating mode is heat pump heating mode, execute step S330; if the operating mode is PTC heating mode, execute step S340.

[0113] Step S320: Obtain vibration data of the compressor, vibration data of the blower, aerodynamic data and ambient sound data in refrigeration mode.

[0114] Step S322: Perform cross-correlation analysis on the acquired data.

[0115] Step S330: Obtain vibration data of the compressor, vibration data of the blower, aerodynamic data and ambient sound data under heat pump heating mode.

[0116] Step S332: Determine the data components of the noise data. If the first proportion of the compressor noise data is greater than 40%, perform data compensation on the frequency band of the compressor noise data.

[0117] Step S340: Obtain vibration data, aerodynamic data, and ambient sound data of the blower in PTC heating mode.

[0118] Step S342: Perform adaptive filtering and dynamically adjust the filtering parameters.

[0119] Step S350: Generate interference data.

[0120] In step S360, interference data is output through a loudspeaker.

[0121] The technical solution provided in this application performs noise reduction operations based on the air conditioner's operating mode. Since the components operating in an air conditioner differ under different operating modes, the causes of air conditioner noise also differ. This application's embodiment performs noise reduction operations based on the air conditioner's operating mode, allowing the noise reduction method to be adapted to the causes of air conditioner noise, thereby achieving targeted noise reduction, effectively reducing air conditioner noise, and improving noise reduction effect and efficiency. Furthermore, this application's embodiment provides diverse methods for reducing air conditioner noise by performing corresponding noise reduction operations based on different operating modes, further enhancing the effectiveness of the noise reduction operation.

[0122] According to a second aspect of this application, a computer-readable storage medium is provided, on which a computer program or instructions are stored, which, when executed by a processor, implement the air conditioning noise reduction method described in the above embodiments. This computer-readable storage medium possesses all the beneficial effects of the above-described air conditioning noise reduction method, and the embodiments of this application will not be repeated here.

[0123] According to a third aspect of this application, a computer program product is provided, comprising a computer program or instructions that, when executed by a processor, implement the air conditioning noise reduction method described in the above embodiments. This computer program product possesses all the beneficial effects of the aforementioned air conditioning noise reduction method, which will not be elaborated further in the embodiments of this application.

[0124] According to a fourth aspect of this application, an electronic device is provided, including a memory storing a computer program thereon; and a processor for executing the computer program in the memory to implement the air conditioning noise reduction method described in the above embodiments. This electronic device possesses all the beneficial effects of the above-described air conditioning noise reduction method, which will not be further elaborated upon in the embodiments of this application.

[0125] Those skilled in the art will understand that embodiments of this application can be provided as methods, systems, or computer program products. Therefore, this application can take the form of a completely hardware embodiment, a completely software embodiment, or an embodiment combining software and hardware aspects. Furthermore, this application can take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, etc.) containing computer-usable program code.

[0126] This application is described with reference to flowchart illustrations and / or block diagrams of methods and computer program products according to embodiments of this application. It will be understood that each block of the flowchart illustrations and / or block diagrams, and combinations of blocks in the flowchart illustrations and / or block diagrams, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, special-purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, generate instructions for implementing the process. Figure 1 One or more processes and / or boxes Figure 1 A device that provides the functions specified in one or more boxes.

[0127] These computer program instructions may also be stored in a computer-readable storage medium that can direct a computer or other programmable data processing device to function in a particular manner, such that the instructions stored in the computer-readable storage medium produce an article of manufacture including instruction means, which are implemented in a process Figure 1 One or more processes and / or boxes Figure 1 The function specified in one or more boxes.

[0128] These computer program instructions may also be loaded onto a computer or other programmable data processing equipment to cause a series of operational steps to be performed on the computer or other programmable equipment to produce a computer-implemented process, thereby providing instructions that execute on the computer or other programmable equipment for implementing the process. Figure 1 One or more processes and / or boxes Figure 1 The steps of the function specified in one or more boxes.

[0129] In a typical configuration, a computing device includes one or more processors (CPU), input / output interfaces, network interfaces, and memory.

[0130] Memory may include non-persistent memory in computer-readable media, such as random access memory (RAM) and / or non-volatile memory, such as read-only memory (ROM) or flash RAM. Memory is an example of computer-readable media.

[0131] Computer-readable media include both permanent and non-permanent, removable and non-removable media, which can store information using any method or technology. Information can be computer-readable instructions, data structures, modules of programs, or other data. Examples of computer storage media include, but are not limited to, phase-change memory (PRAM), static random access memory (SRAM), dynamic random access memory (DRAM), other types of random access memory (RAM), read-only memory (ROM), electrically erasable programmable read-only memory (EEPROM), flash memory or other memory technologies, CD-ROM, digital versatile optical disc (DVD) or other optical storage, magnetic tape, magnetic disk storage or other magnetic storage devices, or any other non-transferable medium that can be used to store information accessible by a computing device. As defined herein, computer-readable media does not include transient media, such as modulated communication signals and carrier waves.

[0132] According to a fifth aspect of this application, an air conditioning noise reduction system is provided, the air conditioning noise reduction system including a controller, the controller being used to perform noise reduction operation according to the operating mode of the air conditioner.

[0133] The air conditioning noise reduction system provided in this application performs noise reduction operations according to the air conditioner's operating mode. This allows the noise reduction operation method to be adapted to the cause of air conditioner noise, thereby achieving targeted noise reduction, effectively reducing air conditioner noise, and improving noise reduction effect and efficiency. Furthermore, this application embodiment provides diverse ways to reduce air conditioner noise by performing corresponding noise reduction operations based on different operating modes, further enhancing the effectiveness of the noise reduction operation.

[0134] Please see Figure 4 , Figure 4 This is a schematic diagram of an air conditioning noise reduction system provided in an embodiment of this application. Figure 4 As shown, in some embodiments, the air conditioning noise reduction system further includes: a vibration sensor 10 for acquiring vibration data, and a first sound sensor 20 for acquiring aerodynamic data; the controller is also configured to determine interference data based on the operating mode, vibration data, and aerodynamic data; wherein the interference data is used to cancel at least a portion of the noise data generated by the air conditioner.

[0135] In some embodiments, the vibration sensor includes an accelerometer.

[0136] In some embodiments, the vibration sensor 10 is disposed in a first region of the compressor 100 housing and / or in a second region of the blower motor 200.

[0137] The vibration sensor 10 in this embodiment can be an accelerometer, which can be a triaxial vibration sensor with a sensitivity greater than or equal to 100 mV / g and a frequency response of 0 to 10 kHz. The vibration sensor 10 can be magnetically or bolted to a first area of ​​the compressor housing, such as the middle of the compressor housing; or it can be disposed in a second area of ​​the blower motor, such as an area where vibration energy is concentrated, like the blower motor bearing housing. The vibration sensor can be used to capture structural vibration data caused by speed fluctuations, component resonance, etc.

[0138] In some embodiments, the first sound sensor includes a first microphone.

[0139] In some embodiments, the first sound sensor 20 is disposed in a third region between the air conditioning duct and the air outlet grille.

[0140] The vehicle cabin typically includes two air conditioning vents: a defrost vent 310 and a face-blowing vent 320. Unless otherwise specified, the air conditioning vents in this embodiment can be either the defrost vent 310 or the face-blowing vent 320.

[0141] The first sound sensor 20 can be an A2B omnidirectional microphone. The first sound sensor 20 is installed in the third area between the air conditioning duct and the air outlet grille, for example, 15 to 20 cm from the grille on the outer wall of the air conditioning duct. It can be installed using a clip-on method with a duct opening. The first sound sensor 20 avoids turbulence interference areas and mainly collects the aerodynamic noise generated by airflow through the duct and grille.

[0142] In some embodiments, the air conditioning noise reduction system further includes a second sound sensor for acquiring ambient sound data.

[0143] In addition to the first sound sensor located at the air conditioning noise source, this embodiment of the application also requires a second sound sensor installed inside the vehicle cabin to acquire ambient sound data. The second sound sensor can be installed at any location within the cabin; for example, two second sound sensors can be installed near the ears on the headrests of each seat. The second sound sensor has a sensitivity of 50mV / Pa and a frequency response of 20Hz-20kHz, enabling it to capture comprehensive ambient sound data within the vehicle.

[0144] According to the sixth aspect of this application, such as Figure 5 As shown, Figure 5This is a schematic diagram of a vehicle provided in an embodiment of this application, showing a vehicle 500. Vehicle 500 includes the electronic equipment described in the above embodiments or includes the air conditioning noise reduction system described above. This vehicle 500 has all the beneficial effects of the above-described electronic equipment or air conditioning noise reduction system, which will not be repeated here. In this embodiment, vehicle 500 can be a gasoline-powered vehicle, a plug-in hybrid electric vehicle, or a new energy vehicle, etc., and this application does not specifically limit it.

[0145] Please see Figure 6 , Figure 6 This is a schematic diagram of a vehicle's air vent, provided as an embodiment of this application. Figure 6 As shown, in some embodiments, the air vent of vehicle 500 extends along a first direction A. Vehicle 500 includes a grille extending along the first direction, the grille being configured to define the air vent.

[0146] Please continue reading. Figure 6 The first direction is direction A as shown in the diagram, or the opposite direction, such as the left and right direction of a vehicle. The surface-blowing air outlet 320 combines four traditional independent air outlets into a single long, continuous outlet. The inner wall of the surface-blowing air outlet 320 can use a streamlined curved surface transition with a curvature radius ≥15mm to reduce airflow separation. The defrosting air outlet 310 combines multiple traditional independent air outlets into a single long, wide outlet. The cross-sectional area of ​​the defrosting air outlet 310 can be increased by 40% to 60%. The edge of the outlet uses a gradually expanding curved surface transition to reduce airflow separation and suppress turbulence noise.

[0147] Please continue reading. Figure 6 The vehicle 500 also includes a grille extending along a first direction. The grille defines the shape, size, and direction of the air vents. For example, the grille can be designed in different shapes such as strips, circles, and rectangles to meet different usage requirements.

[0148] In some embodiments, the spacing between adjacent grilles along the second direction ranges from 5 mm to 20 mm, the size of the grille along the second direction ranges from 0.5 mm to 2 mm, and the second direction intersects with the first direction.

[0149] The second direction is Figure 6 As shown in direction B, or the opposite direction to direction B, the second direction intersects the first direction, such as the vertical direction of a vehicle. In this application embodiment, to reduce the number of airflow cuts, the spacing between adjacent grilles along the second direction can be increased, and the size of the grilles along the second direction can be reduced. For example, the spacing between adjacent grilles can be increased from 5mm to 15mm, and the grille thickness can be reduced from 2mm to 1mm.

[0150] This application embodiment optimizes the design of the air conditioner air outlet from an aerodynamic perspective by increasing the cross-sectional area of ​​the air outlet and reducing the density of the grille, effectively reducing the high-frequency noise of the air conditioner.

[0151] For ease of explanation, the corresponding figures use the directions of up, down, left, right, front, and back to illustrate the relative positional relationships between the parts in this application. These should not be construed as limitations on absolute positions.

[0152] Furthermore, in this application, the first direction corresponds to the front-back direction, the second direction corresponds to the left-right direction, and the third direction corresponds to the up-down direction. Similarly, the first direction here indicates the front-back direction only for the convenience of introducing the specific embodiments of this application. There is no absolute correspondence between the first direction and the front-back direction. Likewise, there is no absolute correspondence between the second direction and the left-right direction, and between the third direction and the up-down direction.

[0153] The first, second, and third directions in this application are only for expressing relative positional relationships; they merely indicate approximate locations rather than absolute geometric relationships.

[0154] In the above embodiments, the descriptions of each embodiment have different focuses. For parts not described in detail in a certain embodiment, please refer to the relevant descriptions in other embodiments.

[0155] The embodiments, implementation methods, and related technical features of this application can be combined and substituted for each other without conflict.

[0156] The above are merely preferred embodiments of this application and are not intended to limit this application in any way. Any simple modifications, equivalent changes, and alterations made to the above embodiments based on the technical essence of this application without departing from the scope of the technical solution of this application shall still fall within the scope of the technical solution of this application.

Claims

1. A method for reducing noise in an air conditioner, characterized in that, include: Noise reduction operation is performed according to the air conditioner's operating mode.

2. The method according to claim 1, characterized in that, The operating mode includes any one of the following: cooling mode, heat pump heating mode, and PTC heating mode.

3. The method according to claim 1, characterized in that, The noise reduction operation based on the air conditioner's operating mode includes: If the ambient sound data meets the first condition, noise reduction operation is performed according to the air conditioner's operating mode.

4. The method according to claim 3, characterized in that, The first condition includes: the sound frequency of the ambient sound data is less than or equal to a preset frequency.

5. The method according to claim 1, characterized in that, The noise reduction operation based on the air conditioner's operating mode includes: Interference data is generated according to the described working mode; The interference data is used to cancel out at least a portion of the noise data generated by the air conditioner.

6. The method according to claim 5, characterized in that, The generation of interference data according to the operating mode includes: The interference data is determined based on the operating mode, vibration data, and aerodynamic data.

7. The method according to claim 6, characterized in that, The vibration data includes at least one of the following: vibration data of the compressor and vibration data of the blower.

8. The method according to claim 6, characterized in that, The pneumatic data includes: pneumatic data of the air conditioning outlet duct.

9. The method according to claim 6, characterized in that, The determination of the interference data based on the operating mode, vibration data, and aerodynamic data includes: When the working mode is cooling mode or heat pump heating mode, the characteristic data of air conditioner noise data is obtained by cross-correlation processing based on ambient sound data, vibration data and aerodynamic data. The interference data is generated based on the characteristic data.

10. The method according to claim 9, characterized in that, The air conditioner noise data includes compressor noise data; the generation of the interference data based on the feature data includes: When the operating mode is the heat pump heating mode, the first proportion of the compressor noise data in the air conditioner noise data is determined based on the characteristic data; If the first proportion is greater than the preset proportion, the vibration data is updated so as to update the interference data according to the updated vibration data.

11. The method according to claim 6, characterized in that, The determination of the interference data based on the operating mode, vibration data, and aerodynamic data includes: When the operating mode is PTC heating mode, the interference data is determined based on vibration data and aerodynamic data using an adaptive filtering algorithm.

12. A computer-readable storage medium having a computer program or instructions stored thereon, characterized in that, When the computer program or instructions are executed by the processor, they implement the air conditioning noise reduction method as described in any one of claims 1 to 11.

13. A computer program product, comprising a computer program or instructions, characterized in that, When the computer program or instructions are executed by the processor, they implement the air conditioning noise reduction method as described in any one of claims 1 to 11.

14. An electronic device, characterized in that, include: A memory on which computer programs or instructions are stored; A processor for executing the computer program or instructions in the memory to implement the air conditioning noise reduction method according to any one of claims 1 to 11.

15. An air conditioning noise reduction system, characterized in that, include: A controller for performing noise reduction operations according to the operating mode of the air conditioner.

16. The system according to claim 15, characterized in that, The system also includes: Vibration sensors are used to acquire vibration data; The first sound sensor is used to acquire aerodynamic data; The controller is further configured to: determine interference data based on the operating mode, the vibration data, and the aerodynamic data; wherein the interference data is used to cancel at least a portion of the noise data generated by the air conditioner.

17. The system according to claim 16, characterized in that, The vibration sensor includes an accelerometer.

18. The system according to claim 16, characterized in that, The vibration sensor is disposed in the first area of ​​the compressor housing and / or in the second area of ​​the blower motor.

19. The system according to claim 16, characterized in that, The first sound sensor includes: a first microphone.

20. The system according to claim 16, characterized in that, The first sound sensor is located in the third area between the air conditioning duct and the air outlet grille.

21. The system according to claim 15, characterized in that, The system also includes: The second sound sensor is used to acquire ambient sound data.

22. A vehicle, characterized in that, It includes the electronic device as described in claim 14, or the air conditioning noise reduction system as described in claims 15 to 21.

23. The vehicle according to claim 22, characterized in that, The vehicle's air vent extends along a first direction; the vehicle includes a grille extending along the first direction, the grille being configured to define the air vent.

24. The vehicle according to claim 23, characterized in that, The spacing between adjacent grilles along the second direction ranges from 5mm to 20mm, and the dimension of the grille along the second direction ranges from 0.5mm to 2mm. The second direction intersects with the first direction.

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