Electric vehicle and its noise reduction air conditioning system and noise reduction method

Abstract

The application provides an electric vehicle and a noise reduction air conditioning system and a noise reduction method thereof, the noise reduction air conditioning system comprising an air conditioning module and a noise reduction module, the air conditioning module comprising an air conditioner, an air outlet air duct and an air return air duct; the noise reduction module comprising a noise monitor, an air conditioner controller, a noise processing module and a playing module, the air conditioner controller, the noise processing module, the playing module and the noise monitor being in communication connection, the noise monitor being installed on the air outlet air duct and / or the air return air duct; the air conditioner controller obtaining the running state of the air conditioning module by receiving noise information collected by the noise monitor; the noise processing module being used for receiving the noise information and converting the noise information into corresponding audio waveform signals; the playing module being used for receiving the audio waveform signals and outputting noise reduction sound waves with the same frequency and opposite phase as the audio waveform frequency, the playing module being installed on the air outlet air duct and / or the air return air duct. The noise reduction air conditioning system solves the problem of poor overall environment noise reduction effect in the existing electric vehicle.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of noise control technology, in particular to an electric vehicle and a noise reduction air conditioning system and method thereof. BACKGROUND

[0002] The basic principle of active noise reduction technology is to generate an anti-phase sound wave that can offset the noise sound wave, so as to achieve the purpose of noise reduction at a specific sound field position. For a pure electric bus with an air conditioning system, the noise in the vehicle mainly comes from the operation of the air conditioner. The patent CN201810900592.0 discloses an active noise reduction method and system applied to a vehicle, as shown in Figure 1 The noise reduction method of the patent includes: identifying the position of the user's ear located on the seat 3 of the vehicle; controlling the noise sampling microphone to collect the first noise signal in the vehicle; controlling the speaker 4 to rotate until the sound outlet of the speaker 4 is directed to the position of the ear; generating a first noise reduction signal according to the first noise signal, the phase of the first noise signal and the first noise reduction signal is opposite; controlling the speaker 4 to play the first noise reduction signal. The noise reduction area of the noise reduction system of the patent is limited to the ear of the seating area, and the noise reduction effect of the overall environment in the vehicle cannot be improved. The speaker is arranged at the position of the seat headrest 5, which occupies the seating space, and each seat in the vehicle needs to be equipped with the system when using the noise reduction system, which has a high use cost. SUMMARY

[0003] The present application solves the technical problem that the noise reduction effect of the overall environment in the existing electric vehicle is poor, and provides an electric vehicle and a noise reduction air conditioning system and method thereof.

[0004] The present application provides a noise reduction air conditioning system suitable for an electric vehicle, which comprises an air conditioning module and a noise reduction module. The air conditioning module comprises an air conditioner, an air outlet duct and an air return duct. The noise reduction module comprises a noise monitor, an air conditioner controller, a noise processing module and a playing module. The air conditioner controller, the noise processing module, the playing module and the noise monitor are in communication connection. The noise monitor is installed in the air outlet duct and / or the air return duct. The air conditioner controller obtains the running state of the air conditioning module by receiving the noise information collected by the noise monitor. The noise processing module is used for receiving the noise information transmitted by the air conditioner controller and converting the noise information into a corresponding audio waveform signal. The playing module is used for receiving the audio waveform signal of the noise processing module and outputting a noise reduction sound wave with the same frequency and opposite phase as the audio waveform frequency. The playing module is installed at the air outlet duct and / or the air return duct.

[0005] Optionally, the noise monitor comprises a noise sensor and a plurality of noise collection devices, the plurality of noise collection devices are evenly arranged along the air outlet duct and / or the plurality of noise collection devices are installed on the air return duct; the plurality of noise sensors are one-to-one correspondingly installed on the plurality of noise collection devices, each noise sensor is used to transmit the noise information collected by the corresponding noise collection device to the air conditioner controller.

[0006] Optionally, the air outlet duct and the air return duct are provided with plate holes, and the plurality of noise collection devices are detachably installed in the plate holes through the setting buckles.

[0007] Optionally, the noise reduction air conditioning system comprises an instrument, the air conditioner controller comprises a noise sensing valve, the instrument and the noise sensing valve are in communication connection; the noise sensing valve receives the noise information collected by the noise monitor;

[0008] When the decibel value of the noise information is within the noise decibel value range of the normal operation state of the air conditioner, the noise sensing valve transmits the noise information to the noise processing module;

[0009] When the decibel value of the noise information is not within the noise decibel value range of the normal operation state of the air conditioner, the noise sensing valve sends an alarm signal to the instrument and then transmits the noise information to the noise processing module.

[0010] Optionally, the noise processing module comprises a sound unit, a first processing unit and a second processing unit, the sound unit receives the noise information of the air conditioner controller, the noise information comprises a noise decibel value; the first processing unit is used to analyze the noise information and convert the noise information into an audio waveform signal; the second processing unit is used to filter the noise in the audio waveform signal that cannot be perceived by human ears and transmit the filtered audio waveform signal to the playing module.

[0011] Optionally, the playing module comprises a plurality of generators, the generators are used to receive the audio waveform signal of the noise processing module and then emit noise waves with the same frequency and opposite phase as the audio waveform frequency.

[0012] In another aspect, the present application also provides a noise reduction method of the noise reduction air conditioning system, comprising the following steps:

[0013] When the air conditioner is running, the noise monitor collects the noise information generated by the air conditioner at the air outlet duct and / or the air return duct;

[0014] The noise detector transmits the collected noise information to the air conditioner controller;

[0015] The air conditioner controller obtains the running state of the air conditioner according to the decibel value of the noise information;

[0016] The noise processing module obtains the noise information transmitted by the air conditioner controller, analyzes the noise information, converts the noise information into a corresponding audio waveform signal, and transmits the audio waveform signal to the playing module.

[0017] The playing module receives the audio waveform signal of the noise processing module, and then emits a noise reduction audio waveform with the same frequency and opposite phase as the audio waveform.

[0018] Optionally, when the decibel value of the noise information is within the noise decibel value range of the normal running state of the air conditioner, the air conditioner controller transmits the noise information to the noise processing module; when the decibel value of the noise information is not within the noise decibel value range of the normal running state of the air conditioner, the air conditioner controller emits a warning signal and then transmits the noise information to the noise processing module.

[0019] Optionally, the noise processing module comprises a second processing unit, which filters noise in the audio waveform that cannot be perceived by human ears, and transmits the filtered audio waveform to the playing module.

[0020] In another aspect, the application also provides an electric vehicle comprising the noise reduction air conditioner system.

[0021] In the application, the noise detector and the playing module are installed at the air outlet duct and / or the air return duct, so that the noise generated during the operation of the air conditioner is reduced before entering the vehicle, the noise in the vehicle is reduced, and the comfort of the vehicle is improved. The air conditioner controller obtains the running state of the air conditioner module by receiving the noise information collected by the noise monitor, and if the air conditioner operates abnormally, it can be found and warned in time, and the safety is improved. BRIEF DESCRIPTION OF DRAWINGS

[0022] Figure 1 is a structural diagram of a noise reduction system in the prior art;

[0023] Figure 2 is a structural diagram of a noise reduction air conditioner system provided by an embodiment of the application;

[0024] Figure 3 is a noise reduction flowchart of a noise reduction air conditioner system provided by an embodiment of the application;

[0025] Figure 4 is a distribution diagram of a noise collection device of a noise reduction air conditioner system provided by an embodiment of the application on an air outlet duct;

[0026] Figure 5This is a schematic diagram showing the distribution of a noise collection device in the return air duct of a noise reduction air conditioning system according to an embodiment of the present invention. Detailed Implementation

[0027] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the invention.

[0028] To illustrate the technical solution of the present invention, specific embodiments are described below.

[0029] like Figures 2-5 As shown, an embodiment of the present invention provides a noise reduction air conditioning system suitable for electric vehicles, comprising an air conditioning module and a noise reduction module. The air conditioning module includes an air conditioner, an air outlet duct, and a return air duct. The noise reduction module includes a noise monitor, an air conditioning controller, a noise processing module, and a playback module. The air conditioning controller, the noise processing module, the playback module, and the noise monitor are communicatively connected. The noise monitor is installed in the air outlet duct 10 and / or the return air duct 20. The air conditioning controller obtains the operating status of the air conditioning module by receiving noise information collected by the noise monitor. The noise processing module receives the noise information transmitted by the air conditioning controller and converts the noise information into a corresponding audio waveform signal. The playback module receives the audio waveform signal from the noise processing module and outputs a noise-reduced wave with the same frequency but opposite phase as the audio waveform. The playback module is installed in the air outlet duct 10 and / or the return air duct 20.

[0030] Air conditioning systems consist of compressors, fans, chillers, water pumps, blowers, and cooling towers. Air conditioning noise can be categorized into dynamic noise and mechanical noise based on its generation method, and also into two main categories based on the location of noise generation: equipment noise and duct and component noise. During operation, air conditioning systems generate mechanical noise due to equipment vibration and the operation of the compressor, motor, and fan; this is considered a noise source. For electric vehicles, the main noise sources are the return air duct 20 below the air conditioner and the air outlet of the outlet air duct 10. Vortex noise is generated within the outlet air duct 10, and this vortex noise is transmitted into the passenger compartment, affecting the passenger experience.

[0031] In this embodiment of the invention, by installing noise detectors and playback modules at the air outlet duct 10 and / or the return air duct 20, the noise generated during air conditioning operation is reduced before entering the vehicle interior, thereby lowering in-vehicle noise and improving passenger comfort. The air conditioning controller obtains the operating status of the air conditioning module by receiving noise information collected by the noise monitor. If the air conditioning malfunctions, it can be detected and alerted in a timely manner, improving safety.

[0032] As Figures 3-5 shown in the figure, in some embodiments of the present application, the noise monitor comprises a plurality of noise sensors and a plurality of noise collection devices, the plurality of noise collection devices are evenly arranged along the air outlet duct 10 and / or the plurality of noise collection devices are installed in the air return duct 20. The plurality of noise sensors are one-to-one corresponding to the plurality of noise collection devices, and each noise sensor is used to transmit the noise information collected by the corresponding noise collection device to the air conditioner controller.

[0033] Specifically, as Figure 4 shown in the figure, the plurality of noise collection devices can be dispersedly arranged in the air outlet duct 10, and specifically, the noise collection devices are arranged at the noise output points of the air outlet duct 10, i.e. the noise collection devices are arranged at the air outlets of the air outlet duct 10, and the plurality of noise collection devices are communicatively connected. The air outlet duct 10 comprises a first air outlet duct 11 and a second air outlet duct 12, and the noise output points on the first air outlet duct 11 comprise A1, A2, A3 and A4, and the noise output points on the second air outlet duct 12 comprise B1, B2, B3 and B4.

[0034] As Figure 5 shown in the figure, the plurality of noise collection devices can be centrally arranged at the air return duct 20, and the noise output points at the air return duct 20 comprise C1, C2, C3 and C4, and at least one of the noise output points is provided with the noise collection device. The noise collection device is rotatably installed at the air return duct 20 to realize multi-angle collection of noise information.

[0035] In some embodiments of the present application, the air duct 10 and the air return duct 20 are provided with plate holes, and the plurality of noise collection devices are detachably installed in the plate holes by being provided with buckles.

[0036] As Figure 2 and Figure 3 shown in the figure, in some embodiments of the present application, the noise reduction air conditioner system comprises an instrument, the air conditioner controller comprises a noise sensing valve, and the instrument and the noise sensing valve are communicatively connected. The noise sensing valve receives the noise information collected by the noise monitor. When the decibel value of the noise information is within the noise decibel value range of the normal operation state of the air conditioner, the noise sensing valve transmits the noise information to the noise processing module. When the decibel value of the noise information is not within the noise decibel value range of the normal operation state of the air conditioner, the noise sensing valve sends an alarm signal to the instrument and then transmits the noise information to the noise processing module. By detecting whether the air conditioner is in a normal working state through the noise sensing valve, it is avoided that the playing module cannot know the fault condition after the noise reduction air conditioner.

[0037] As Figure 2 andFigure 3 As shown in the embodiments of the present application, the noise processing module comprises a sound unit, a first processing unit and a second processing unit. The sound unit receives noise information of the air conditioner controller, and the noise information comprises noise decibel values. The first processing unit is configured to analyze the noise information and convert the noise information into an audio waveform signal. The second processing unit is configured to filter noise in the audio waveform signal that cannot be perceived by human ears and transmit the filtered audio waveform signal to the playing module. Specifically, the noise that cannot be perceived by human ears is ultrahigh frequency and ultralow frequency noise, as shown in Table 1.

[0038] Table 1

[0039]

[0040] As shown in the embodiments of the present application, the noise processing module comprises a sound unit, a first processing unit and a second processing unit. The sound unit receives noise information of the air conditioner controller, and the noise information comprises noise decibel values. The first processing unit is configured to analyze the noise information and convert the noise information into an audio waveform signal. The second processing unit is configured to filter noise in the audio waveform signal that cannot be perceived by human ears and transmit the filtered audio waveform signal to the playing module. Specifically, the noise that cannot be perceived by human ears is ultrahigh frequency and ultralow frequency noise, as shown in Table 1. Figure 2 And Figure 3 As shown in the embodiments of the present application, the noise processing module comprises a sound unit, a first processing unit and a second processing unit. The sound unit receives noise information of the air conditioner controller, and the noise information comprises noise decibel values. The first processing unit is configured to analyze the noise information and convert the noise information into an audio waveform signal. The second processing unit is configured to filter noise in the audio waveform signal that cannot be perceived by human ears and transmit the filtered audio waveform signal to the playing module. Specifically, the noise that cannot be perceived by human ears is ultrahigh frequency and ultralow frequency noise, as shown in Table 1.

[0041] On the other hand, as shown in the embodiments of the present application, the noise reduction method of the noise reduction air conditioner system comprises the following steps: when the air conditioner is running, the noise detector collects noise information generated by the air conditioner at the air outlet duct 10 and / or the air return duct 20. Figure 3 The noise detector transmits the collected noise information to the air conditioner controller. Specifically, the noise information at the air outlet duct 10 and / or the air return duct 20 is collected through a noise collection device, and the noise information is transmitted to the air conditioner controller through a noise sensor.

[0042] The air conditioner controller obtains the running state of the air conditioner according to the decibel value of the noise information.

[0043] The noise processing module obtains the noise information transmitted by the air conditioner controller, analyzes the noise information, converts the noise information into a corresponding audio waveform signal, and transmits the audio waveform signal to the playing module. Specifically, the sound unit receives noise information of the air conditioner controller, and the noise information comprises noise decibel values. The first processing unit analyzes the noise information and converts the noise information into an audio waveform signal.

[0044]

[0045] ​The playing module receives the audio waveform signal of the noise processing module, and then sends out the noise-reducing sound wave with the same frequency and opposite phase as the audio waveform.

[0046] In some embodiments of the present application, when the decibel value of the noise information is within the noise decibel value range of the normal operation state of the air conditioner, the air conditioner controller transmits the noise information to the noise processing module. When the decibel value of the noise information is not within the noise decibel value range of the normal operation state of the air conditioner, the air conditioner controller sends a warning signal and then transmits the noise information to the noise processing module.

[0047] In some embodiments of the present application, the noise processing module comprises a second processing unit that filters the noise in the audio waveform that cannot be perceived by human ears and transmits the filtered audio waveform to the playing module.

[0048] In another aspect, an embodiment of the present application also provides an electric vehicle comprising the noise-reducing air conditioning system.

[0049] The above embodiments are only used to illustrate the technical solutions of the present application, but not to limit it. Although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that they can still modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacements to some technical features. These modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present application, and should be included in the protection scope of the present application.

Claims

1. A noise-reducing air conditioning system suitable for electric vehicles, characterized in that, The system includes an air conditioning module and a noise reduction module. The air conditioning module includes an air conditioner, an air outlet duct, and a return air duct. The noise reduction module includes a noise monitor, an air conditioning controller, a noise processing module, and a playback module. The air conditioning controller, the noise processing module, the playback module, and the noise monitor are communicatively connected. The noise monitor is installed in the air outlet duct and the return air duct. The air conditioner controller obtains the operating status of the air conditioner module by receiving noise information collected by the noise monitor; the noise processing module is used to receive the noise information transmitted by the air conditioner controller and convert the noise information into a corresponding audio waveform signal. The playback module is used to receive the audio waveform signal from the noise processing module and output a noise-reduced wave with the same frequency but opposite phase as the audio waveform. The playback module is installed at the air outlet duct and the air return duct. The noise monitor includes multiple noise acquisition devices, which are evenly arranged along the air outlet duct and rotatably installed at the return air duct.

2. The noise reduction air conditioning system according to claim 1, characterized in that, The noise monitor also includes multiple noise sensors; the multiple noise sensors are installed one-to-one on the multiple noise acquisition devices, and each noise sensor is used to transmit the noise information collected by the corresponding noise acquisition device to the air conditioner controller.

3. The noise reduction air conditioning system according to claim 2, characterized in that, The air outlet duct and the air return duct are provided with plate holes, and multiple noise collection devices are detachably installed in the plate holes by means of clips.

4. The noise reduction air conditioning system according to claim 1, characterized in that, The noise reduction air conditioning system includes an instrument, and the air conditioning controller includes a noise sensing valve. The instrument and the noise sensing valve are communicatively connected. The noise sensing valve receives noise information collected by the noise monitor; When the decibel value of the noise information is within the noise decibel value range of the air conditioner's normal operating state, the noise sensing valve transmits the noise information to the noise processing module; When the decibel value of the noise information is not within the range of the noise decibel value during normal operation of the air conditioner, the noise sensing valve sends an alarm signal to the instrument and then transmits the noise information to the noise processing module.

5. The noise reduction air conditioning system according to claim 1, characterized in that, The noise processing module includes a sound unit, a first processing unit, and a second processing unit. The sound unit receives noise information from the air conditioner controller, and the noise information includes a noise decibel value. The first processing unit is used to analyze the noise information and convert it into an audio waveform signal. The second processing unit is used to filter out noise that is imperceptible to the human ear from the audio waveform signal and transmit the filtered audio waveform signal to the playback module.

6. The noise reduction air conditioning system according to claim 1, characterized in that, The playback module includes multiple generators, which are used to receive the audio waveform signal from the noise processing module and then emit a noise-reduced frequency waveform with the same frequency but opposite phase as the audio waveform.

7. A noise reduction method for a noise-reducing air conditioning system as described in any one of claims 1-6, characterized in that, Includes the following steps: When the air conditioner is running, the noise monitor collects noise information generated by the air conditioner at the air outlet duct and / or the air return duct. The noise detector transmits the collected noise information to the air conditioner controller; The air conditioner controller obtains the operating status of the air conditioner based on the decibel value of the noise information; The noise processing module acquires the noise information transmitted by the air conditioner controller, analyzes the noise information, converts the noise information into a corresponding audio waveform signal, and transmits the audio waveform signal to the playback module. The playback module receives the audio waveform signal from the noise processing module, and then emits a noise-reducing wave with the same frequency but opposite phase as the audio waveform.

8. The noise reduction method for the noise-reducing air conditioning system according to claim 7, characterized in that, When the decibel value of the noise information is within the noise decibel value range of the air conditioner's normal operating state, the air conditioner controller transmits the noise information to the noise processing module; when the decibel value of the noise information is not within the noise decibel value range of the air conditioner's normal operating state, the air conditioner controller issues an alarm signal and then transmits the noise information to the noise processing module.

9. The noise reduction method for the noise-reducing air conditioning system according to claim 7, characterized in that, The noise processing module includes a second processing unit, which filters out noise in the audio waveform that is imperceptible to the human ear and transmits the filtered audio waveform to the playback module.

10. An electric vehicle, characterized in that, The noise-reducing air conditioning system includes any one of claims 1-6.

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