Noise reduction method and apparatus for air-conditioning system, and air-conditioning system, vehicle and medium

Abstract

Provided in the present application are a noise reduction method and apparatus for an air-conditioning system, and an air-conditioning system, a vehicle and a medium. By means of determining noise information of an air-conditioning system, and controlling, on the basis of the noise information, an electric motor of the air-conditioning system to perform noise reduction processing on the air-conditioning system, adaptive noise reduction is achieved by means of controlling the electric motor of the air-conditioning system itself without it being necessary to install additional compensation speakers or human-ear positioning collection apparatuses, thus reducing system costs, improving the overall noise reduction effect inside a vehicle, reducing the assembly complexity and improving the noise reduction experience of the air-conditioning system.

Description

A method and apparatus for noise reduction in an air conditioning system, an air conditioning system, a vehicle, and a medium.

[0001] Cross-references to related applications

[0002] This application claims priority to Chinese Patent Application No. 2024109937225, filed on July 24, 2024, entitled "A noise reduction method and apparatus for an air conditioning system, an air conditioning system, a vehicle, and a medium", the entire contents of which are incorporated herein by reference. Technical Field

[0003] This application relates to the field of air conditioning technology, and in particular to a noise reduction method and device for an air conditioning system, an air conditioning system, a vehicle, and a medium. Background Technology

[0004] With the rapid development and popularization of electric vehicles, the noise problem generated by vehicle air conditioning systems is receiving increasing attention. In traditional gasoline vehicles, the engine noise often masks other noises, while in relatively quieter electric vehicles, the noise of auxiliary equipment such as air conditioning fans has become one of the main factors affecting passenger comfort. Especially when driving at high speed or stationary, the noise of the fan can directly affect the passenger's riding experience.

[0005] In related technologies, noise reduction of air conditioning systems is often achieved by using a main noise acquisition device installed in the air conditioning unit, as well as a human ear positioning acquisition device and a compensation speaker installed inside the passenger compartment. The noise is collected and processed by a signal processor to generate an opposite sound wave signal, which is then sent to the speaker to reduce the noise entering the passenger's ears.

[0006] However, this system requires the installation of additional compensation speakers and ear localization sensors inside the vehicle, which not only increases the system's cost but also raises the complexity of assembly. Furthermore, because it only focuses on noise reduction in the area occupied by a single user, it cannot comprehensively improve the overall noise reduction effect inside the vehicle, resulting in a poor noise reduction experience. Summary of the Invention

[0007] In view of the above problems, a noise reduction method, apparatus, equipment, and medium for an air conditioning system are proposed to overcome or at least partially solve the above problems, including:

[0008] A noise reduction method for an air conditioning system, the method comprising:

[0009] Determine the noise information of the air conditioning system;

[0010] Based on the noise information, the motor of the air conditioning system is controlled to reduce noise in the air conditioning system.

[0011] Optionally, based on noise information, the motor of the air conditioning system is controlled to perform noise reduction processing on the air conditioning system, including:

[0012] Based on the noise information, generate a noise reduction control signal that matches the air conditioning system;

[0013] Based on the noise reduction control signal, the motor of the air conditioning system is controlled to perform noise reduction processing on the air conditioning system.

[0014] Optionally, based on the noise reduction control signal, the motor of the air conditioning system is controlled to perform noise reduction processing on the air conditioning system, including:

[0015] A noise reduction control signal is sent to the motor driver of the air conditioning system, so that the motor driver generates a motor drive signal based on the noise reduction control signal and controls the motor of the air conditioning system to perform noise reduction processing according to the motor drive signal.

[0016] Optionally, the noise reduction control signal includes a noise reduction current command signal, and the motor drive signal is obtained by superimposing the noise reduction current command signal and the normal operating current command signal of the motor.

[0017] Optionally, based on the noise information, a noise reduction control signal matching the air conditioning system is generated, including:

[0018] The noise information is processed based on the adaptive control algorithm to obtain the noise reduction control signal that matches the air conditioning system.

[0019] Optionally, the adaptive control algorithm includes one or more of the following: least mean square algorithm, recursive least squares algorithm, and affine projection algorithm.

[0020] Optionally, noise reduction measures are implemented for the air conditioning system's motor, including:

[0021] The rotor in the motor of the air conditioning system is controlled to vibrate, generating anti-noise waves to cancel out the noise waves of the air conditioning system.

[0022] Optionally, the air conditioning system includes a noise collection sensor, which is located at the air outlet of the air conditioning system. Noise information is collected by the noise collection sensor, and the noise information includes the air outlet noise information of the air conditioning system.

[0023] Optionally, before controlling the air conditioning system's motor to perform noise reduction processing based on noise information, the method further includes:

[0024] The noise information of the air conditioning system is filtered.

[0025] Optionally, the filtering process is used to filter out the first noise information in the noise information that does not require noise reduction processing. The first noise information includes the second noise information that is inaudible to the human ear.

[0026] Optionally, the electric motor may include one or more of the following: an electric motor for the air outlet direction of the air conditioning system, a cooling / heating electric motor, and a mode electric motor.

[0027] An electronic device, the device comprising:

[0028] The noise information determination module is used to determine the noise information of the air conditioning system;

[0029] The noise reduction module is used to control the motor of the air conditioning system to reduce noise in the air conditioning system.

[0030] An electronic device includes a processor connected to a memory;

[0031] The processor is used to run computer programs stored in memory. When the computer programs are executed by the processor, they implement the noise reduction method of the air conditioning system described above.

[0032] An air conditioning system includes an electric motor and the electronic devices described above.

[0033] A vehicle that includes the electronic devices described above, or a vehicle that includes the air conditioning system described above.

[0034] A computer-readable storage medium storing a computer program, which, when executed by a processor, implements the noise reduction method of the air conditioning system described above.

[0035] This application has the following advantages:

[0036] In this embodiment, by determining the noise information of the air conditioning system and controlling the motor of the air conditioning system according to the noise information to perform noise reduction processing on the air conditioning system, adaptive noise reduction is achieved by controlling the motor of the air conditioning system itself. There is no need to install additional compensation speakers and human ear positioning acquisition devices, which reduces the cost of the system, improves the overall noise reduction effect inside the vehicle, reduces the complexity of assembly, and improves the noise reduction experience of air conditioning.

[0037] The above description is only an overview of the technical solution of this application. In order to better understand the technical means of this application and to implement it in accordance with the contents of the specification, and to make the above and other objects, features and advantages of this application more obvious and understandable, the following are specific embodiments of this application. Attached Figure Description

[0038] To more clearly illustrate the technical solution of this application, the drawings used in the description of this application will be briefly introduced below. Obviously, the 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.

[0039] Figure 1 is a flowchart of the steps of a noise reduction method for an air conditioning system provided in some embodiments of this application;

[0040] Figure 2 is an example diagram of the arrangement of the noise collection sensor according to some embodiments of this application;

[0041] Figure 3 is a schematic diagram of the structure of the air conditioning noise reduction system provided in some embodiments of this application;

[0042] Figure 4 is a schematic diagram of the motor control flow of this application provided in some embodiments;

[0043] Figure 5 is a flowchart of another noise reduction method for an air conditioning system provided in some embodiments of this application;

[0044] Figure 6 is a schematic diagram of the structure of an electronic device provided in some embodiments of this application;

[0045] Figure 7 is a block diagram of an electronic device provided in some embodiments of this application;

[0046] Figure 8 is a schematic diagram of an air conditioning system provided in some embodiments of this application;

[0047] Figure 9 is a schematic diagram of a vehicle provided in some embodiments of this application;

[0048] Figure 10 is a schematic diagram of a computer-readable medium provided in some embodiments of this application. Detailed Implementation

[0049] To make the above-mentioned objectives, features, and advantages of this application more apparent and understandable, the application will be further described in detail below with reference to the accompanying drawings and specific embodiments. Obviously, the described embodiments are only some, not all, of the embodiments of this application. All other embodiments obtained by those skilled in the art based on the embodiments of this application without inventive effort are within the scope of protection of this application.

[0050] With the rapid development and popularization of electric vehicles, the noise problem generated by vehicle air conditioning systems is receiving increasing attention. In traditional gasoline vehicles, the engine noise often masks other noises, while in relatively quieter electric vehicles, the noise of auxiliary equipment such as air conditioning fans has become one of the main factors affecting passenger comfort. Especially when driving at high speed or stationary, the noise of the fan can directly affect the riding experience.

[0051] In related technologies, noise reduction of air conditioning systems is often achieved by using a main noise acquisition device installed in the air conditioning unit, as well as a human ear positioning acquisition device and a compensation speaker installed inside the passenger compartment. The noise is collected and processed by a signal processor to generate an opposite sound wave signal, which is then sent to the speaker to reduce the noise entering the passenger's ears.

[0052] However, this system requires the installation of additional compensation speakers and ear localization sensors inside the vehicle, which not only increases the system's cost but also raises the complexity of assembly. Furthermore, because it only focuses on noise reduction in the area occupied by a single user, it cannot comprehensively improve the overall noise reduction effect inside the vehicle, resulting in a poor noise reduction experience.

[0053] In this application embodiment, based on the core technical concept of adaptive noise reduction by controlling the motor of the air conditioning system itself, the noise reduction method of the air conditioning system in the related technology has been improved. The following will describe this application in detail with reference to the accompanying drawings:

[0054] Referring to Figure 1, a flowchart of the steps of a noise reduction method for an air conditioning system provided in some embodiments of this application is shown, which may specifically include the following steps:

[0055] Step 101: Determine the noise information of the air conditioning system.

[0056] In practice, due to the airflow during the operation of the air conditioning system, the air outlet of the air conditioning system often generates a large amount of aerodynamic noise. When the noise is transmitted into the vehicle, it will greatly affect the passenger's riding comfort. Therefore, a noise collection device can be installed at the air outlet of the air conditioning system to obtain the noise information in the air duct of the air conditioning system in response to the start-up operation of the air conditioning system for subsequent noise reduction processing.

[0057] In some embodiments of this application, the air conditioning system includes a noise collection sensor, which is disposed at the air outlet of the air conditioning system. Noise information is collected by the noise collection sensor, and the noise information includes the air outlet noise information of the air conditioning system.

[0058] In practical applications, noise collection sensors can be devices that can pick up and collect sound signals, such as microphones, voice recorders, and other sound acquisition devices. Specifically, as shown in Figure 2, multiple noise collection sensors can be evenly distributed and installed at the air outlet of the air duct to avoid obstructing the airflow in the duct and thus generating additional noise. In response to the start-up operation of the air conditioning system, the noise collection sensors can acquire noise information in the air outlet duct of the air conditioning system for subsequent noise reduction processing, and ensure the accuracy and timeliness of obtaining noise information.

[0059] Step 102: Based on the noise information, control the motor of the air conditioning system to perform noise reduction processing on the air conditioning system.

[0060] In practical implementation, as shown in Figure 3, an air conditioning noise reduction system can be designed by combining some structures of the air conditioning system to reduce the noise of the air conditioning system. Specifically, the air conditioning noise reduction system may include a motor, a noise collection sensor, a signal processor, and a motor driver; the noise collection sensor, signal processor, and motor can be connected by communication. The noise collection sensor can be installed at the air conditioning outlet to collect noise information in the air duct in real time.

[0061] Furthermore, the signal processor can receive noise information from the noise collection sensor and generate corresponding control signals to drive the motor driver after processing. The signal processor can include a filtering module and an adaptive control algorithm module. The filtering module is mainly used to filter the received noise information, thereby filtering out sounds beyond human hearing. The adaptive control algorithm module can use various algorithms and their variations, including but not limited to RLS (Recursive Least Squares), AP (Affine Projection), and LMS (Least Mean Squares), as adaptive control algorithms. This allows the signal processor to update the filter parameters of the adaptive control filter in the filtering module in real time through the adaptive control algorithm, and to process the noise information through the adaptive control algorithm to provide a noise reduction control signal to the motor driver. In turn, the motor driver obtains the motor drive signal through the noise reduction control signal to control the motor for subsequent noise reduction processing. Taking the Least Mean Square Error (LMS) algorithm as an example, the weight coefficients of the adaptive control filter can be updated by iteratively calculating the LMS algorithm, and a noise reduction control signal can be provided to the motor driver. The motor driver can control the motor to perform noise reduction processing through the noise reduction control signal, thereby reducing the noise at the air conditioner outlet.

[0062] It should be emphasized that the air conditioning noise reduction system used in this application is mainly used to illustrate the method of using an electric motor as a secondary source to generate corresponding vibrations to achieve active noise reduction. It is applicable to all systems used for active noise reduction in related technologies, including feedforward systems, feedback systems and hybrid systems, etc., and can be adjusted according to actual needs in practical applications.

[0063] Furthermore, a noise reduction control signal can be sent to the motor driver of the air conditioning system, so that the motor driver generates a motor drive signal based on the noise reduction control signal. Then, according to the motor drive signal, the current components of the motor of the air conditioning system on the d-axis (direct axis) and q-axis (quadrature axis) can be adjusted, thereby controlling the rotor of the motor to vibrate, thereby generating a noise reduction frequency waveform (i.e., anti-noise wave) with the same frequency and opposite phase as the noise at the air outlet of the air conditioning system. It can also be emitted by components such as mounting brackets connected to the motor, so that the noise generated by the operation of the air conditioning is canceled by the anti-noise wave before entering the vehicle interior, thereby completing the noise reduction treatment and improving the noise reduction effect of the entire vehicle interior.

[0064] Specifically, as shown in Figure 4, PI refers to Proportional-Integral Controller, SVPWM refers to Space Vector Pulse Width Modulation, α, β, a, b, and c refer to the currents in the intermediate processing flow of the current loop, and d and q refer to the currents on the d-axis and q-axis of the motor, respectively. Specifically, the noise reduction control signal can include a noise reduction current command signal. The motor can be controlled by superimposing the noise reduction current command signal on the normal operating current command signal of the motor to generate a corresponding motor drive signal. That is, after superimposing the noise reduction current command signal required to generate the noise suppression wave with the normal operating current signal of the motor, the motor is controlled through the corresponding current loop processing flow. This allows the motor to generate electromagnetic torque for normal function while also generating a torque signal proportional to the current command signal required to generate the noise suppression wave. This torque signal can cause the rotor of the motor to vibrate and generate a noise reduction frequency waveform with the same frequency and opposite phase as the noise at the air outlet of the air conditioning system, based on the principle of sound generation.

[0065] In some embodiments of this application, before controlling the motor of the air conditioning system to perform noise reduction processing based on noise information, the method further includes:

[0066] The noise information of the air conditioning system is filtered.

[0067] In practical applications, before generating the current command signal, the received noise information can be filtered by a filtering module to eliminate sounds beyond human hearing. Specifically, the filter parameters of the adaptive control filter in the filtering module can be updated in real time using an adaptive control algorithm. Taking the Least Mean Square Error (LMS) algorithm as an example, the weight coefficients of the adaptive control filter can be updated iteratively using the LMS algorithm to perform reasonable filtering of noise information, thereby eliminating noise signals that do not affect human hearing or do not require noise reduction, and enhancing the target accuracy and effectiveness of noise reduction processing.

[0068] In some embodiments of this application, filtering is used to filter out first noise information in the noise information that does not require noise reduction processing. The first noise information includes second noise information that is inaudible to the human ear.

[0069] In practical applications, as mentioned above, before generating the current command signal, the received noise information can be filtered by a filtering module to filter out sounds beyond human hearing and other noise information that does not require noise reduction. Specifically, the filter parameters of the adaptive control filter in the filtering module can be updated in real time through an adaptive control algorithm. Taking the LMS algorithm as an example, the weight coefficients of the adaptive control filter can be updated iteratively through the LMS algorithm to perform reasonable filtering of noise information, thereby eliminating noise signals that do not affect human hearing or do not require noise reduction, and enhancing the target accuracy and effectiveness of noise reduction processing.

[0070] In some embodiments of this application, noise reduction processing of the air conditioning system is performed by controlling the motor of the air conditioning system based on noise information, including:

[0071] Based on the noise information, generate a noise reduction control signal that matches the air conditioning system;

[0072] Based on the noise reduction control signal, the motor of the air conditioning system is controlled to perform noise reduction processing on the air conditioning system.

[0073] In practical applications, an air conditioning noise reduction system can be designed by incorporating parts of the air conditioning system's structure to reduce noise levels. Specifically, the air conditioning noise reduction system may include a motor, a noise collection sensor, a signal processor, and a motor driver; the noise collection sensor, signal processor, and motor can be connected for communication. The noise collection sensor can be installed at the air conditioning outlet to collect noise information within the air duct in real time.

[0074] Furthermore, the signal processor can receive noise information from the noise collection sensor and generate corresponding control signals to drive the motor driver after processing. The signal processor can include a filtering module and an adaptive control algorithm module. The filtering module is mainly used to filter the received noise information, thereby filtering out sounds beyond human hearing. The adaptive control algorithm module can use various algorithms, including but not limited to RLS, AP, and LMS, and their variations, as adaptive control algorithms. This allows the signal processor to update the filter parameters of the adaptive control filter in the filtering module in real time through the adaptive control algorithm, and to process the noise information through the adaptive control algorithm to provide a noise reduction control signal to the motor driver. The motor driver then obtains the motor drive signal through the noise reduction control signal to control the motor for subsequent noise reduction processing. Taking the Least Mean Square Error (LMS) algorithm as an example, the LMS algorithm can iteratively calculate and update the weight coefficients of the adaptive control filter and provide a noise reduction control signal to the motor driver. The motor driver can then precisely control the motor to perform noise reduction processing through the noise reduction control signal, thereby reducing noise at the air conditioner vent and achieving more effective noise control.

[0075] In some embodiments of this application, the motor of the air conditioning system is controlled to perform noise reduction processing on the air conditioning system according to the noise reduction control signal, including:

[0076] A noise reduction control signal is sent to the motor driver of the air conditioning system, so that the motor driver generates a motor drive signal based on the noise reduction control signal and controls the motor of the air conditioning system to perform noise reduction processing according to the motor drive signal.

[0077] In practical implementation, a noise reduction control signal can be sent to the motor driver of the air conditioning system, so that the motor driver generates a motor drive signal based on the noise reduction control signal. Then, according to the motor drive signal, the current components of the motor in the air conditioning system on the d-axis and q-axis can be adjusted, thereby controlling the rotor of the motor to vibrate, and thus generating a noise reduction frequency waveform (i.e., anti-noise wave) with the same frequency and opposite phase as the noise at the air outlet of the air conditioning system. Alternatively, sound can be generated by components such as mounting brackets connected to the motor, so that the noise generated by the air conditioning operation is canceled by the anti-noise wave before entering the vehicle interior, thereby completing the noise reduction process, improving the noise reduction effect of the entire vehicle interior, and making the noise reduction process more efficient and automated.

[0078] In some embodiments of this application, the noise reduction control signal includes a noise reduction current command signal, and the motor drive signal is obtained by superimposing the noise reduction current command signal and the normal operating current command signal of the motor.

[0079] In practical applications, the motor can be controlled by superimposing the noise reduction current command signal required for generating the noise suppression wave onto the normal operating current command signal of the motor to generate a corresponding motor drive signal. That is, after superimposing the noise reduction current command signal required for generating the noise suppression wave with the normal operating current signal of the motor, the motor is controlled through a corresponding current loop processing flow. This allows the motor to generate electromagnetic torque for normal function while also generating a torque signal proportional to the current command signal required for generating the noise suppression wave. This torque signal can cause the rotor of the motor to vibrate and generate a noise reduction frequency waveform with the same frequency and opposite phase as the noise at the air outlet of the air conditioning system, based on the principle of sound generation. Thus, noise reduction is achieved while ensuring the normal function of the motor, saving energy and reducing the load on the electric system.

[0080] In some embodiments of this application, a noise reduction control signal matching the air conditioning system is generated based on noise information, including:

[0081] The noise information is processed based on the adaptive control algorithm to obtain the noise reduction control signal that matches the air conditioning system.

[0082] In practical implementation, as mentioned above, an air conditioning noise reduction system can be designed by combining some structures of the air conditioning system to reduce the noise of the air conditioning system. Specifically, the air conditioning noise reduction system may include a motor, a noise collection sensor, a signal processor, and a motor driver; the noise collection sensor, signal processor, and motor can be connected by communication. The noise collection sensor can be installed at the air conditioning outlet to collect noise information in the air duct in real time.

[0083] Furthermore, the signal processor can receive noise information from the noise collection sensor and generate corresponding control signals to drive the motor driver after processing. The signal processor can include a filtering module and an adaptive control algorithm module. The filtering module is mainly used to filter the received noise information, thereby filtering out sounds beyond human perception. The adaptive control algorithm module can use various algorithms, including but not limited to RLS, AP, and LMS, and their variations, as adaptive control algorithms. This allows the signal processor to update the filter parameters of the adaptive control filter in the filtering module in real time through the adaptive control algorithm, and to process the noise information through the adaptive control algorithm to provide a noise reduction control signal to the motor driver. The motor driver then obtains the motor drive signal through the noise reduction control signal to control the motor for subsequent noise reduction processing. Taking the Least Mean Square Error (LMS) algorithm as an example, the LMS algorithm can iteratively calculate and update the weight coefficients of the adaptive control filter and provide a noise reduction control signal to the motor driver. The motor driver can then control the motor to perform noise reduction processing through the noise reduction control signal, thereby reducing noise at the air conditioner vent and ensuring the accuracy and real-time performance of the noise reduction effect.

[0084] In some embodiments of this application, the adaptive control algorithm includes one or more of the least mean square algorithm, recursive least squares algorithm, and affine projection algorithm.

[0085] In practical implementation, the adaptive control algorithm module can employ various algorithms and their variations, including but not limited to RLS, AP, and LMS. This allows the signal processor to update the filter parameters of the adaptive control filter in the filtering module in real time and provide a current command signal to the motor driver. The motor driver then controls the motor for subsequent noise reduction processing via the current command signal. Taking the Least Mean Square Error (LMS) algorithm as an example, the LMS algorithm can iteratively calculate and update the weight coefficients of the adaptive control filter. For instance, the gradient descent optimization of the adaptive filter parameters can be achieved by calculating the error signal, thereby updating the adaptive filter parameters until they converge to the weight parameter W* corresponding to the minimum error signal. Furthermore, a current command signal can be provided to the motor driver, which can then control the motor for noise reduction, thereby reducing noise at the air conditioner vent and ensuring the accuracy and real-time performance of the noise reduction effect.

[0086] It should be emphasized that the LMS algorithm used in the adaptive control algorithm module of this application embodiment is only one of the possible algorithm examples. The function of the LMS algorithm is to update the filter weight parameters and to process the noise information through the LMS algorithm to provide a current command signal to the motor driver. Linear filter adaptive algorithms, including RLS and AP, as well as nonlinear filter adaptive algorithms based on neural networks, can all achieve the effect of adaptively updating the filter weight parameters and providing a current command signal to the motor driver. In practical applications, the appropriate algorithm can be selected according to specific requirements.

[0087] In some embodiments of this application, controlling the motor of the air conditioning system to perform noise reduction processing on the air conditioning system includes:

[0088] The rotor in the motor of the air conditioning system is controlled to vibrate, generating anti-noise waves to cancel out the noise waves of the air conditioning system.

[0089] In practical implementation, the current components of the air conditioning system's motor on the d-axis (direct axis) and q-axis (quadrature axis) can be adjusted according to the current command signal, thereby controlling the motor rotor to vibrate and generate a noise-reducing frequency waveform (i.e., anti-noise wave) that has the same frequency and opposite phase as the noise at the air outlet of the air conditioning system. Alternatively, the noise can be generated by components such as mounting brackets connected to the motor, so that the noise generated by the air conditioning operation is canceled by the anti-noise wave before entering the vehicle interior, thus completing the noise reduction process and improving the overall noise reduction effect inside the vehicle.

[0090] Specifically, as shown in Figure 4, PI refers to Proportional-Integral Controller, SVPWM refers to Space Vector Pulse Width Modulation, α, β, a, b, and c refer to the currents in the intermediate processing flow of the current loop, and d and q refer to the currents on the d-axis and q-axis of the motor, respectively. Specifically, the motor can be controlled by superimposing the current command signal required for generating the noise suppression wave onto the normal operating current signal of the motor. That is, after superimposing the current command signal required for generating the noise suppression wave with the normal operating current signal of the motor, the motor is controlled through the corresponding current loop processing flow. This allows the motor to generate electromagnetic torque for normal function while also generating a torque signal proportional to the current command signal required for generating the noise suppression wave. This torque signal causes the motor rotor to vibrate and, based on the principle of sound generation, produces a noise reduction frequency waveform with the same frequency but opposite phase as the noise at the air conditioning system vent, thus achieving active noise reduction and improving the overall noise reduction effect of the vehicle.

[0091] In some embodiments of this application, the electric motor includes one or more of the following: an electric motor for the air outlet direction of an air conditioning system, a cooling / heating electric motor, and a mode electric motor.

[0092] In practical applications, since the electric motor is a secondary source in the aforementioned air conditioning noise reduction system, it can receive control signals from the motor driver to generate controlled vibrations and emit anti-noise waves to cancel out noise at the air conditioner outlet. Therefore, the electric motor can be a motor that controls the airflow direction, a heating / cooling motor, a mode motor, etc. After receiving the corresponding control signals from the motor driver, it can play noise-reducing frequency waveforms with the same frequency but opposite phase as the noise at the air conditioner outlet to achieve a noise reduction effect. By considering different types of electric motors in the air conditioning system for noise reduction processing, the application scope and applicability of the noise reduction method are expanded, allowing selection based on the noise reduction requirements of different scenarios.

[0093] As can be seen from the above, this application generates corresponding sounds to cancel out the noise generated by the air conditioning system inside the vehicle by controlling an electric motor installed inside the air conditioning system. It can achieve active noise reduction of the air conditioning system without the need to add speakers, specific actuators for noise reduction, or external amplifiers, nor without large-scale modification of the existing air conditioning structure. Therefore, it can reduce the overall weight and manufacturing cost of the vehicle and reduce the complexity of the system. In addition, by installing a noise collection device at the air conditioning vent and emitting sound waves with the opposite phase to the noise through the vibration of the internal motor, this application can complete the noise reduction work before the noise enters the vehicle cabin, and perform noise reduction processing on the overall noise inside the vehicle.

[0094] In summary, the noise reduction method for an air conditioning system provided in this application obtains noise information within the air duct of the air conditioning system in response to the system's startup operation; processes the noise information using an adaptive control algorithm to generate a current command signal; and controls the air conditioning system's motor to perform noise reduction processing based on the current command signal. This method achieves adaptive noise reduction by controlling the air conditioning system's own motor, eliminating the need for additional compensation speakers and human ear positioning acquisition devices, reducing system costs, improving the overall noise reduction effect inside the vehicle, reducing assembly complexity, and enhancing the noise reduction experience of the air conditioning system.

[0095] Referring to Figure 5, a flowchart of another noise reduction method for an air conditioning system provided in some embodiments of this application is shown, which may specifically include the following steps:

[0096] Step 501: In response to the start-up operation of the air conditioning system, acquire noise information in the air outlet duct of the air conditioning system;

[0097] In practice, due to the airflow during the operation of the air conditioning system, the air outlet of the air conditioning system often generates a large amount of aerodynamic noise. When the noise is transmitted into the vehicle, it will greatly affect the passenger's riding comfort. Therefore, a noise collection device can be installed at the air outlet of the air conditioning system to obtain the noise information in the air duct of the air conditioning system in response to the start-up operation of the air conditioning system for subsequent noise reduction processing.

[0098] Step 502: The noise information is processed according to the adaptive control algorithm to generate a current command signal.

[0099] In practical implementation, as shown in Figure 3, an air conditioning noise reduction system can be designed by combining some structures of the air conditioning system to reduce the noise of the air conditioning system. Specifically, the air conditioning noise reduction system may include a motor, a noise collection sensor, a signal processor, and a motor driver; the noise collection sensor, signal processor, and motor can be connected by communication. The noise collection sensor can be installed at the air conditioning outlet to collect noise information in the air duct in real time.

[0100] Furthermore, the signal processor can receive noise signals from a noise collection sensor and generate corresponding control signals to drive the motor driver after processing. The signal processor may include a filtering module and an adaptive control algorithm module. The filtering module is mainly used to filter the received noise information, thereby filtering out sounds beyond human perception. The adaptive control algorithm module can employ various algorithms, including but not limited to RLS, AP, and LMS, and their variations, as adaptive control algorithms. This allows the signal processor to update the filter parameters of the adaptive control filter in the filtering module in real time through the adaptive control algorithm, and to process the noise information through the adaptive control algorithm to provide a current command signal to the motor driver. The motor driver then controls the motor to perform subsequent noise reduction processing via the current command signal. Taking the Least Mean Square Error (LMS) algorithm as an example, the LMS algorithm can iteratively calculate and update the weight coefficients of the adaptive control filter and provide a current command signal to the motor driver. The motor driver can then control the motor to perform noise reduction processing via the current command signal, thereby reducing noise at the air conditioner vent.

[0101] It should be emphasized that the air conditioning noise reduction system used in this application is mainly used to illustrate the method of using an electric motor as a secondary source to generate corresponding vibrations to achieve active noise reduction. It is applicable to all systems used for active noise reduction in related technologies, including feedforward systems, feedback systems and hybrid systems, etc., and can be adjusted according to actual needs in practical applications.

[0102] Step 503: According to the current command signal, control the rotor in the motor of the air conditioning system to vibrate in order to generate anti-noise waves;

[0103] In practical applications, the current components of the motor in the air conditioning system on the d-axis and q-axis can be adjusted according to the current command signal, thereby controlling the rotor of the motor to vibrate, and thus generating a noise reduction frequency waveform (i.e., anti-noise wave) with the same frequency and opposite phase as the noise at the air outlet of the air conditioning system. Sound can also be generated through components such as mounting brackets connected to the motor.

[0104] Step 504: Based on the noise reduction wave, perform noise reduction treatment on the air conditioning system.

[0105] In practical implementation, the current components of the air conditioning system's motor on the d-axis and q-axis can be adjusted according to the current command signal, thereby controlling the motor rotor to vibrate and generate a noise reduction frequency waveform (i.e., anti-noise wave) with the same frequency and opposite phase as the noise at the air outlet of the air conditioning system. Alternatively, the noise can be generated by components such as the mounting bracket connected to the motor, so that the noise generated by the air conditioning operation is canceled by the anti-noise wave before entering the vehicle interior, thus improving the noise reduction effect of the entire vehicle interior.

[0106] It should be noted that, for the sake of simplicity, the method embodiments are all described as a series of actions. However, those skilled in the art should understand that the embodiments of this application are not limited to the described order of actions, because according to the embodiments of this application, some steps can be performed in other orders or simultaneously. Secondly, those skilled in the art should also understand that the embodiments described in the specification are all preferred embodiments, and the actions involved are not necessarily required by the embodiments of this application.

[0107] Referring to Figure 6, a structural schematic diagram of an electronic device 601 provided in some embodiments of this application is shown, which may specifically include the following modules:

[0108] Noise information determination module 602 is used to determine the noise information of the air conditioning system;

[0109] The noise reduction module 603 is used to control the motor of the air conditioning system to perform noise reduction processing on the air conditioning system.

[0110] In some embodiments of this application, the noise reduction processing module 603 includes:

[0111] The noise reduction control signal generation submodule is used to generate a noise reduction control signal that matches the air conditioning system based on the noise information.

[0112] The noise reduction processing submodule is used to control the motor of the air conditioning system to perform noise reduction processing on the air conditioning system according to the noise reduction control signal.

[0113] In some embodiments of this application, the noise reduction processing submodule includes:

[0114] The motor drive signal generation unit is used to send a noise reduction control signal to the motor driver of the air conditioning system, so that the motor driver generates a motor drive signal based on the noise reduction control signal and controls the motor of the air conditioning system to perform noise reduction processing according to the motor drive signal.

[0115] In some embodiments of this application, the noise reduction control signal generation submodule includes:

[0116] The noise reduction control signal generation unit is used to process noise information based on an adaptive control algorithm to obtain a noise reduction control signal that matches the air conditioning system.

[0117] In some embodiments of this application, the noise reduction processing module 603 includes:

[0118] The noise suppression wave generation submodule is used to control the rotor in the motor of the air conditioning system to vibrate in order to generate noise suppression waves to cancel out the noise waves of the air conditioning system.

[0119] In some embodiments of this application, the apparatus further includes:

[0120] The filtering module is used to filter the noise information of the air conditioning system.

[0121] As the device embodiment is basically similar to the method embodiment, the description is relatively simple, and relevant parts can be found in the description of the method embodiment.

[0122] In addition, this application embodiment also provides an electronic device 701, as shown in FIG7, including a processor 702, a communication interface 703, a memory 704, and a communication bus 705, wherein the processor 702, the communication interface 703, and the memory 704 communicate with each other through the communication bus 705.

[0123] Memory 704 is used to store computer programs;

[0124] When processor 702 executes a program stored in memory 704, it performs the following steps:

[0125] Determine the noise information of the air conditioning system;

[0126] Based on the noise information, the motor of the air conditioning system is controlled to reduce noise in the air conditioning system.

[0127] In one optional embodiment of this application, the noise reduction process of the air conditioning system's motor is controlled based on noise information, including:

[0128] Based on the noise information, generate a noise reduction control signal that matches the air conditioning system;

[0129] Based on the noise reduction control signal, the motor of the air conditioning system is controlled to perform noise reduction processing on the air conditioning system.

[0130] In one optional embodiment of this application, the motor of the air conditioning system is controlled to perform noise reduction processing on the air conditioning system according to the noise reduction control signal, including:

[0131] A noise reduction control signal is sent to the motor driver of the air conditioning system, so that the motor driver generates a motor drive signal based on the noise reduction control signal and controls the motor of the air conditioning system to perform noise reduction processing according to the motor drive signal.

[0132] In one optional embodiment of this application, generating a noise reduction control signal matching the air conditioning system based on noise information includes:

[0133] The noise information is processed based on the adaptive control algorithm to obtain the noise reduction control signal that matches the air conditioning system.

[0134] In one optional embodiment of this application, controlling the motor of the air conditioning system to perform noise reduction processing on the air conditioning system includes:

[0135] The rotor in the motor of the air conditioning system is controlled to vibrate, generating anti-noise waves to cancel out the noise waves of the air conditioning system.

[0136] In one optional embodiment of this application, before controlling the motor of the air conditioning system to perform noise reduction processing on the air conditioning system based on noise information, the method further includes:

[0137] The noise information of the air conditioning system is filtered.

[0138] The communication bus mentioned above can be a Peripheral Component Interconnect (PCI) bus or an Extended Industry Standard Architecture (EISA) bus, etc. This communication bus can be divided into address bus, data bus, control bus, etc. For ease of illustration, only one thick line is used to represent it in the diagram, but this does not mean that there is only one bus or one type of bus.

[0139] The communication interface is used for communication between the aforementioned terminal and other devices.

[0140] The memory may include random access memory (RAM) or non-volatile memory, such as at least one disk storage device. Optionally, the memory may also be at least one storage device located remotely from the aforementioned processor.

[0141] The processors mentioned above can be general-purpose processors, including central processing units (CPUs), network processors (NPs), etc.; they can also be digital signal processors (DSPs), application-specific integrated circuits (ASICs), field-programmable gate arrays (FPGAs), or other programmable logic devices, discrete gate or transistor logic devices, or discrete hardware components.

[0142] As shown in Figure 8, in another embodiment provided in this application, an air conditioning system 801 is also provided. The air conditioning system includes an electric motor 802 and the electronic device 601 or electronic device 701 as described above.

[0143] As shown in FIG9, in another embodiment provided in this application, a vehicle 901 is also provided, the vehicle including the electronic device 601 or electronic device 701 as described above, or the vehicle including the air conditioning system 801 as described above.

[0144] As shown in Figure 10, in another embodiment provided in this application, a computer-readable storage medium 1001 is also provided, which stores instructions that, when run on a computer, cause the computer to execute a noise reduction method for an air conditioning system as described above.

[0145] In another embodiment provided in this application, a computer program product containing instructions is also provided, which, when run on a computer, causes the computer to execute a noise reduction method for an air conditioning system as described in the above embodiments.

[0146] In the above embodiments, implementation can be achieved, in whole or in part, through software, hardware, firmware, or any combination thereof. When implemented in software, it can be implemented, in whole or in part, as a computer program product. A computer program product includes one or more computer instructions. When the computer program instructions are loaded and executed on a computer, all or part of the flow or function according to the embodiments of this application is generated. The computer can be a general-purpose computer, a special-purpose computer, a computer network, or other programmable device. The computer instructions can be stored in a computer-readable storage medium or transmitted from one computer-readable storage medium to another. For example, computer instructions can be transmitted from one website, computer, server, or data center to another website, computer, server, or data center via wired (e.g., coaxial cable, fiber optic, digital subscriber line (DSL)) or wireless (e.g., infrared, wireless, microwave, etc.) means. The computer-readable storage medium can be any available medium that a computer can access or a data storage device such as a server or data center that integrates one or more available media. The available medium can be a magnetic medium (e.g., floppy disk, hard disk, magnetic tape), an optical medium (e.g., DVD), or a semiconductor medium (e.g., a solid-state disk (SSD)).

[0147] It should be noted that, in this document, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes the element.

[0148] The various embodiments in this specification are described in a related manner. Similar or identical parts between embodiments can be referred to mutually. Each embodiment focuses on describing the differences from other embodiments. In particular, the system embodiments are basically similar to the method embodiments, so the description is relatively simple; relevant parts can be referred to the descriptions of the method embodiments.

[0149] The above are merely preferred embodiments of this application and are not intended to limit the scope of protection of this application. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application are included within the scope of protection of this application.

Claims

1. A method of reducing noise of an air conditioning system, the method comprising: The method comprises: determining noise information of the air conditioning system; controlling a motor of the air conditioning system to perform noise reduction processing on the air conditioning system according to the noise information.

2. The noise reduction method of an air conditioning system of claim 1, wherein, The controlling a motor of the air conditioning system to perform noise reduction processing on the air conditioning system according to the noise information comprises: generating a noise reduction control signal matched with the air conditioning system according to the noise information; controlling the motor of the air conditioning system to perform noise reduction processing on the air conditioning system according to the noise reduction control signal. 3.The noise reduction method of an air conditioning system of claim 2, wherein, The controlling the motor of the air conditioning system to perform noise reduction processing on the air conditioning system according to the noise reduction control signal comprises: sending the noise reduction control signal to a motor driver of the air conditioning system, so that the motor driver generates a motor driving signal based on the noise reduction control signal and controls the motor of the air conditioning system to perform noise reduction processing on the air conditioning system according to the motor driving signal. 4.The noise reduction method of an air conditioning system of claim 3, wherein, The noise reduction control signal comprises a noise reduction current instruction signal, and the motor driving signal is obtained by superimposing the noise reduction current instruction signal and a normal working current instruction signal of the motor.

5. The noise reduction method of an air conditioning system according to any one of claims 2-4, characterized in that, The generating a noise reduction control signal matched with the air conditioning system according to the noise information comprises: performing operation processing on the noise information based on an adaptive control algorithm to obtain the noise reduction control signal matched with the air conditioning system. 6.The noise reduction method of an air conditioning system of claim 5, wherein, The adaptive control algorithm comprises one or more of a least mean square algorithm, a recursive least square algorithm and an affine projection algorithm.

7. The method of claim 1-4, wherein, The controlling the motor of the air conditioning system to perform noise reduction processing on the air conditioning system comprises: controlling a rotor in the motor of the air conditioning system to generate vibration to generate anti-noise waves to offset noise sound waves of the air conditioning system.

8. The method of claim 1-4, wherein, The air conditioning system comprises a noise collection sensor, the noise collection sensor is arranged at an air outlet of the air conditioning system, the noise information is collected by the noise collection sensor, and the noise information comprises air outlet noise information of the air conditioning system.

9. The method of claim 1-4, wherein, Before the controlling the motor of the air conditioning system to perform noise reduction processing on the air conditioning system according to the noise information, the method further comprises: performing filtering processing on the noise information of the air conditioning system. 10.The noise reduction method of an air conditioning system of claim 9, wherein, The filtering processing is used to filter out first noise information in the noise information that does not need to be subjected to noise reduction processing, and the first noise information comprises second noise information that cannot be heard by human ears.

11. The method of claim 1-4, wherein, The motor comprises one or more of a motor in an air outlet direction of the air conditioning system, a heating and cooling motor and a mode motor.

12. An electronic device, comprising: The device comprises: a noise information determination module configured to determine noise information of an air conditioning system; a noise reduction processing module configured to control a motor of the air conditioning system to perform noise reduction processing on the air conditioning system.

13. An electronic device, comprising: The device comprises a processor and a memory connected to the processor. The processor is configured to run a computer program stored on the memory, and the computer program is executed by the processor to implement the noise reduction method of the air conditioning system according to any one of claims 1 to 11.

14. An air conditioning system characterized by, The air conditioning system comprises a motor, and the air conditioning system further comprises the electronic device according to claim 12 or claim 13.

15. A vehicle characterized by comprising: The vehicle comprises the electronic device according to claim 12 or claim 13, or the vehicle comprises the air conditioning system according to claim 14.

16. A computer-readable storage medium, characterized in that, The computer readable storage medium stores a computer program, and the computer program is executed by the processor to implement the noise reduction method of the air conditioning system according to any one of claims 1 to 11.

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