Noise reduction method and system, range hood and mobile equipment

Abstract

The invention provides a noise reduction method and system, a range hood and mobile equipment. According to the noise reduction method, through cooperation of a range hood and a mobile device, the range hood works in a working mode, noise of the position where a user is located is collected through the mobile device in the working mode, and a noise reduction signal is generated according to the noise; and the range hood controls a loudspeaker to emit a corresponding noise reduction audio according to the noise reduction signal. Thus, the noise reduction purpose is achieved through the noise reduction signal corresponding to the working mode of the range hood, meanwhile, generation of the noise reduction signal is related to noise of the position where a user is located, and therefore the noise of the position where the user is located can be effectively reduced; in addition, the powerful data processing performance of the mobile equipment can be exerted by performing data processing through the mobile equipment, and the cost of the range hood can also be reduced.

Description

Technical Field

[0001] The embodiments of the present invention relate to the technical field of household appliances, and specifically to a noise reduction method, system, range hood and mobile device. Background Art

[0002] The range hood will make a lot of noise during use, which affects the user experience. The noise mainly comes from the fan inside the range hood.

[0003] In order to solve the above-mentioned problem, the noise reduction solution in the prior art can be achieved by collecting the noise near the fan and using active noise reduction technology. However, since users are in different positions and feel different noises, this solution cannot fundamentally improve the user's perception of noise.

[0004] Secondly, existing solutions usually process and analyze noise signals through the range hood's processor, which brings additional costs and the signal processing algorithm is not easy to update.

[0005] In addition, due to the differences in the installation environments of range hoods, the noise reduction solutions built into the range hoods cannot adapt to different environments, so that under some environmental conditions, users experience poor noise reduction effects from the range hoods. Summary of the invention

[0006] One of the purposes of the embodiments of the present invention is to provide an improved noise reduction method, system, range hood and mobile device.

[0007] Therefore, an embodiment of the present invention provides a noise reduction method, which is applied to a range hood, wherein the range hood includes at least one working mode, and the method includes: the range hood receives a control instruction including a working mode; the range hood responds to the control instruction to control the range hood to work in the working mode; the range hood receives a noise reduction signal corresponding to the working mode, and controls a speaker to emit corresponding audio according to the noise reduction signal; wherein the noise reduction signal is generated according to a first noise at a user's location collected by a mobile device when the range hood works in the working mode, and the noise reduction signal is opposite in phase to the collected first noise.

[0008] This embodiment describes the noise reduction method from the perspective of the operation of the range hood. The noise reduction purpose is achieved by using a noise reduction signal corresponding to the working mode of the range hood. At the same time, the generation of the noise reduction signal is related to the noise at the user's location, so the noise at the user's location can be effectively reduced, improving the user experience.

[0009] Optionally, the method further includes: when a second noise collected in the working mode is lower than a preset value, storing a noise reduction signal corresponding to the working mode, wherein the second noise is the noise at the user's location after the speaker emits a corresponding audio according to the noise reduction signal.

[0010] Optionally, when the second noise collected in the working mode is higher than a preset value, a noise reduction signal regenerated according to the second noise is obtained, and the range hood is controlled to emit corresponding audio according to the regenerated noise reduction signal.

[0011] Optionally, the method further includes, when the second noise collected in the working mode is lower than a preset value, receiving a control instruction containing another working mode, and controlling the range hood to enter the other working mode.

[0012] The above method is used to further verify the effect of the noise reduction signal. Specifically, by collecting the second noise again and comparing it with the preset target, when the comparison result does not achieve the set noise reduction effect, the noise reduction signal is regenerated to obtain a better noise reduction effect.

[0013] Optionally, the noise reduction signal is generated by a mobile device or a server, and the range hood receives the noise reduction signal corresponding to the working mode from the mobile device or the server through a communication module. By using an external device to process data and generate a corresponding noise reduction signal, the cost of the range hood is reduced and data processing is made more efficient; at the same time, the data processing algorithm can also be updated in a timely manner.

[0014] Optionally, before the mobile device collects the first noise at the user's location, the current distance between the mobile device and the range hood is obtained, and when the current distance is less than or equal to a preset distance, the mobile device collects the first noise and generates the noise reduction signal. By limiting the distance to limit the conditions for the mobile device to collect noise, the collected data is more accurate and noise interference that is not within the preset range is eliminated.

[0015] Optionally, the working mode includes: at least one of: a low wind speed mode, a medium wind speed mode, a high wind speed mode and a stir-fry mode.

[0016] An embodiment of the present invention also discloses a noise reduction method, which is applied to a mobile device, and the method includes: the mobile device sends a control instruction containing a working mode to the range hood, wherein the range hood includes at least one working mode; when the range hood works in the working mode, the mobile device collects a first noise at the user's location; the mobile device generates a noise reduction signal based on the first noise; and the noise reduction signal is sent to the range hood to control the speaker of the range hood to emit a corresponding audio; wherein the audio is opposite in phase to the collected first noise.

[0017] This embodiment describes the noise reduction method from the perspective of mobile device operation. Through the cooperation between the mobile device and the range hood, the noise reduction signal corresponding to the range hood in a certain working mode is obtained and sent to the range hood, so that the range hood can perform noise reduction based on the signal. In this way, by processing data through the mobile device and generating a noise reduction signal, on the one hand, the powerful data processing performance of the mobile device can be brought into play, and the data processing algorithm can also be updated in time; on the other hand, the cost of the range hood can be reduced.

[0018] Optionally, the method includes: collecting the noise at the user's location again, i.e., the second noise; determining whether the second noise is lower than a preset value; and generating a control instruction to control the range hood to enter a next working mode when the second noise is lower than the preset value.

[0019] Optionally, when the second noise collected in the working mode is higher than a preset value, a noise reduction signal is regenerated according to the second noise and sent to the range hood, so that the range hood emits corresponding audio according to the regenerated noise reduction signal.

[0020] The above method is used to further verify the effect of the noise reduction signal. Specifically, the second noise is collected again by the mobile device and compared with the preset target. When the comparison result does not achieve the set noise reduction effect, the noise reduction signal is regenerated to obtain a better noise reduction effect.

[0021] Optionally, before sending a control instruction containing the working mode to the range hood, the method further includes: receiving a control instruction for updating a noise reduction signal corresponding to the working mode. The noise reduction signal can be updated according to an external instruction so that the noise reduction signal can be applied to different range hood working environments, thereby improving the noise reduction effect and user experience.

[0022] Optionally, before the mobile device collects the first noise at the user's location, the current distance between the mobile device and the range hood is obtained, and when the current distance is less than or equal to a preset distance, the first noise is collected and the noise reduction signal is generated.

[0023] Optionally, the working mode includes: at least one of: a low wind speed mode, a medium wind speed mode, a high wind speed mode and a stir-fry mode.

[0024] An embodiment of the present invention further discloses a noise reduction system, including a range hood and a mobile device communicatively connected to the range hood, wherein the range hood and the mobile device are respectively used to execute the corresponding methods described above.

[0025] An embodiment of the present invention further discloses a range hood, comprising a memory and a processor coupled to the memory, wherein the memory is used to store a computer program, and the processor is used to run the computer program so that the range hood executes a corresponding method.

[0026] An embodiment of the present invention further discloses a mobile device, including a memory and a processor coupled to the memory, wherein the memory is used to store a computer program, and the processor is used to run the computer program, so that the mobile device executes the corresponding method described above. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 is a network architecture diagram of a range hood and external devices according to an embodiment of the present invention;

[0028] Figure 2 This is a schematic diagram of the structure of a range hood according to an embodiment of the present invention;

[0029] Figure 3 is a flow chart of a range hood control method according to an embodiment of the present invention;

[0030] Figure 4 is a flow chart of another range hood control method according to an embodiment of the present invention;

[0031] Figure 5 is a flow chart of the smoke machine and the mobile device cooperating with each other to update the noise reduction signal according to the embodiment of the present invention;

[0032] Figure 6 The present invention is a flowchart of a method for updating a noise reduction signal according to an embodiment of the present invention. DETAILED DESCRIPTION

[0033] The embodiment of the present invention provides a range hood and a control method thereof. In summary, the range hood has a control module and a speaker, and the range hood also has multiple working modes. The range hood can control the speaker to send a corresponding noise reduction signal according to its different working modes, thereby achieving the purpose of noise reduction.

[0034] Furthermore, the range hood can also receive user feedback on the noise reduction effect, and readjust or calibrate the noise reduction signal corresponding to different working modes based on the feedback. In this solution, the process of readjusting the noise reduction signal is mainly implemented by an external device, which can be a mobile device or server connected to the range hood. The readjusted noise reduction signal can be stored in the memory of the range hood for the range hood to call for noise reduction control.

[0035] By adopting this implementation scheme, the range hood can adjust the corresponding noise reduction signals in different working modes based on the different requirements of users for noise reduction effects. At the same time, the process of re-adjusting the noise reduction signal is processed by an external device, and the noise reduction signal is obtained by using the powerful computing power of the external device, and the data is processed efficiently, which can also reduce the cost of the range hood.

[0036] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, specific embodiments of the present invention are described in detail below with reference to the accompanying drawings.

[0037] Figure 1 is a network architecture diagram of a range hood and external devices according to an embodiment of the present invention; Figure 2 This is a schematic diagram of the structure of a range hood according to an embodiment of the present invention; Figure 3 is a flow chart of a range hood control method according to an embodiment of the present invention. Figure 1 , 2 The smoke machine shown can perform Figure 3 The control method shown.

[0038] Specifically, refer to Figure 1 and 2 The range hood 10 has a communication module 13 that can be connected to an external device such as a mobile device 20 or a server 30 for communication.

[0039] Furthermore, the range hood 10 has at least one working mode, wherein the working modes may include a low wind speed mode, a medium wind speed mode, a high wind speed mode, and a stir-fry mode. The working modes may also have other forms, which may be set according to different requirements. Generally, the noise generated by the range hood in different working modes is different, and the corresponding noise reduction signals are also different. For example, in the stir-fry mode, the fan speed of the range hood is relatively high, and the corresponding noise generated is also relatively high.

[0040] Specifically, Figure 2 The structure of the range hood 10 is shown in FIG. The range hood 10 comprises a control module 11 , a memory 12 connected to the control module 11 , a communication module 13 , a speaker 14 and a fan 15 .

[0041] The control module 11 controls the working mode of the range hood, specifically, controls the fan 15 to work in different working modes, and the speed of the fan is different in different modes.

[0042] The memory 12 stores the correspondence between the working mode and the noise reduction signal. The control module 11 can control the speaker 14 according to the correspondence in the memory 12, so that the speaker 14 generates the corresponding audio signal for noise reduction.

[0043] The communication module 13 enables the range hood 10 to communicate with external devices including the mobile device 20 or the server 30 , so that data can be processed with the help of the external device and the processed data can be obtained.

[0044] One or more speakers 14 can be provided and can be adjusted according to actual needs.

[0045] In one embodiment, the control method for the range hood 10 to achieve noise reduction may be that when the range hood 10 operates in a certain working mode, the control module 11 may call the noise reduction signal corresponding to the working mode stored in the memory 12, and control the speaker 14 to play the corresponding audio based on the signal to achieve noise reduction.

[0046] The generation process of the noise reduction signal can be implemented in the following manner: when the user carries the mobile device 20 to cook, the range hood 10 works in a certain working mode. At this time, the mobile device 20 can collect the noise conditions at the user's location, and then generate a corresponding noise reduction signal based on the noise and send it to the range hood 10; the range hood 10 receives the signal through the communication module 13 and stores the signal in the memory 12.

[0047] Furthermore, in the process of generating the noise reduction signal, the noise reduction effect of the noise reduction signal can be further verified. Specifically, when the range hood 10 receives the noise reduction signal through the communication module 13, the control module 11 can control the speaker 14 to emit the audio corresponding to the noise reduction signal, and then the mobile device 20 continues to collect the noise at the user's location and compares it with the preset target. When the noise collected again is lower than the preset target, the noise reduction signal is stored in the memory 12.

[0048] Furthermore, after the noise reduction signal is stored in the memory 12, the range hood 10 can be controlled to enter another working mode, and the noise reduction signal corresponding to the working mode can be generated in the same manner as described above.

[0049] In order to achieve a more effective noise reduction effect, the mobile device 20 should usually collect noise within a reasonable range of the range hood 10. In general, the mobile device 20 is carried by the user. When the range hood is used, the mobile device 20 collects and processes the noise at the user's location to achieve a better noise reduction effect, and the user experience is also improved. The user's location here can be understood as the user's usual possible location when using the range hood. This location can be specifically defined according to the needs of the solution, for example, it can be an area within a preset range from the range hood.

[0050] In one embodiment, the generation process of the noise reduction signal can be activated by user feedback. For example, the range hood can be provided with an input module, and the user activates the noise reduction function; after the user activates the function, when the range hood works in a certain working mode and performs noise reduction control, the user can then provide feedback on the noise reduction effect through the input module, thereby activating the generation process of the noise reduction signal.

[0051] A range hood control method is described in detail below. Figure 3 Shows Figure 2 A range hood control method applied to a range hood 10 includes the following steps:

[0052] S300, a noise reduction signal corresponding to a preset working mode, wherein the noise reduction signal is generated based on the noise at the user's location when the range hood is in different working modes; usually the preset noise reduction signal is stored in the memory 12;

[0053] S302, obtaining the current working mode of the range hood;

[0054] S304: Control the range hood to generate audio corresponding to the noise reduction signal according to the current working mode, wherein the audio is in opposite phase to the noise.

[0055] In a specific embodiment, the noise reduction signal corresponding to the working mode is pre-stored in the memory 12, wherein the noise reduction signal is generated based on the noise at the user's location when the range hood is in different working modes. For example, the noise reduction signal can be generated by the mobile device 20 or the server 30, the communication module 13 of the range hood receives the signal, and the memory 12 stores the noise reduction signal corresponding to the working mode from the mobile device 20 or the server 30. The method for generating the noise reduction signal will be described later.

[0056] The control module 11 controls the speaker 14 to generate audio corresponding to the noise reduction signal according to the current working mode of the range hood, wherein the phase of the audio is opposite to that of the noise.

[0057] Furthermore, when the range hood emits the corresponding noise reduction audio based on the aforementioned working mode, the user can provide feedback based on his or her own perception of the noise, so that the device can readjust the noise reduction signal corresponding to the working mode according to the user's noise reduction needs. That is, the control module 11 can also update the corresponding noise reduction signal based on the user's feedback on the current noise reduction effect.

[0058] Through the above method, according to the pre-stored noise reduction signal, the speaker of the range hood is controlled to generate corresponding noise reduction frequency in different working modes to achieve noise reduction. In this solution, the noise reduction signal is generated based on the noise collected at the user's location, which can make the noise reduction signal more effective in reducing the noise felt by the user; secondly, the noise reduction signal is pre-stored in the memory, and the noise signal and other data do not need to be processed on the range hood, which reduces the requirements for the hardware equipment of the range hood; thirdly, the noise reduction signal matching the working mode can improve the noise reduction effect and provide a better user experience.

[0059] Figure 4A specific working process of the control method of the range hood 10 is shown. In step S400, the range hood 10 works in a working mode, such as a stir-frying mode, and the control module 11 controls the speaker 14 to play the audio of the corresponding noise reduction signal in the memory 12 according to the working state. In step S402, the user can provide feedback based on the noise situation after the noise reduction, and determine whether it is necessary to further update the noise reduction signal corresponding to the working mode of the range hood. In step S404, if the user feedback needs to update the corresponding noise reduction signal, the process of generating the noise reduction signal is re-entered; otherwise, the whole working process ends.

[0060] The user's feedback may be input by setting a button or a touch unit on the range hood, or may be input by a non-contact method, such as voice input.

[0061] The process of re-entering the generated noise-reduced signal is achieved in the following way.

[0062] Specifically, the control module 11 may include a receiving unit and an updating unit.

[0063] The receiving unit can receive a user's feedback signal on the noise status of the range hood in the current working mode. For example, when the range hood is working in the stir-fry mode and the user activates the noise reduction function, the range hood 10 can control the speaker 14 to generate the noise reduction audio corresponding to the stir-fry mode to achieve noise reduction. Once the user feels that the noise reduction effect in the stir-fry mode is not good or does not meet their noise reduction needs, they can provide feedback through the interaction of the range hood, such as triggering a corresponding button on the interactive interface of the range hood to provide feedback.

[0064] The updating unit can determine whether to update the noise reduction signal corresponding to at least one working mode according to the feedback signal. The feedback signal can be negative, that is, the user is not satisfied with the current noise reduction effect and hopes to update the corresponding noise reduction signal; or it can be positive, that is, the user is satisfied with the current noise reduction effect and the user does not input any feedback information or inputs positive feedback, and the device does not need to take any action.

[0065] Furthermore, the updating unit may perform an updating action based on the negative feedback from the user. The process of updating the noise reduction signal is completed by the external device and the range hood together. For example, after the updating process is completed, the updating unit may receive an updated noise reduction signal corresponding to the working mode, wherein the updated noise reduction signal is generated based on the first noise at the user's location collected by the mobile device when the range hood is working in the working mode, and the updated noise reduction signal is opposite in phase to the collected first noise.

[0066] In some embodiments, the noise reduction signal corresponding to the current working mode of the range hood can be updated, and the noise reduction signals corresponding to all working modes can also be updated. By updating the noise reduction signal corresponding to the working mode, the noise reduction effect of the range hood can be made to better meet the noise reduction needs of the user.

[0067] The control module 11 can control the speaker 14 of the range hood 10 to emit corresponding audio according to the updated noise reduction signal. When the second noise collected in the working mode is lower than the preset value, the memory 12 can store the noise reduction signal corresponding to the working mode, wherein the second noise is the noise at the user's location collected again after the range hood emits the corresponding audio according to the noise reduction signal.

[0068] When the second noise collected in the working mode is higher than a preset value, a noise reduction signal regenerated according to the second noise is obtained, and the speaker 14 is controlled to emit corresponding audio according to the regenerated noise reduction signal.

[0069] In another embodiment, the control module 11 can also generate corresponding audio in combination with the user's location information, working mode and noise reduction signal. Specifically, the memory 12 can store the corresponding relationship between the user's location information, the working mode and the noise reduction signal; the control module 11 can obtain the current user's location information and the current working mode of the range hood, obtain the corresponding noise reduction signal according to the relationship, and control the speaker 14 to generate corresponding audio according to the noise reduction signal.

[0070] Furthermore, the noise reduction signal updating method can be implemented by the cooperation between the range hood and an external device such as a mobile device that is in communication with the range hood. For example, the control module 11 can receive a control instruction of the working mode from the mobile device 20, and in response to the control instruction, control the range hood to work in the working mode.

[0071] Combination Figure 5 , showing a method in which the range hood 10 and the mobile device 20 cooperate with each other to update the noise reduction signal.

[0072] S500, the mobile device 20 sends a control instruction including an operating mode to the range hood 10, wherein the operating mode may be one of a low wind speed mode, a medium wind speed mode, a high wind speed mode and a stir-fry mode;

[0073] S502, the range hood 10 receives a control instruction including an operating mode, and responds to the control instruction to control the range hood to operate in the operating mode;

[0074] S504, the mobile device 20 collects a first noise at the user's location when the range hood 10 is working in the working mode, and generates a noise reduction signal according to the first noise, wherein the noise reduction signal is opposite in phase to the collected first noise; wherein the process of generating the noise reduction signal can be implemented by a known active noise reduction algorithm;

[0075] S506, the mobile device 20 sends the noise reduction signal to the range hood 10;

[0076] S508, the range hood 10 receives the noise reduction signal, and controls the speaker 14 to emit corresponding audio according to the noise reduction signal.

[0077] In this embodiment, the mobile device collects and processes noise to generate a corresponding noise reduction signal, and the range hood controls the speaker to play the corresponding audio in a certain working mode according to the received noise reduction signal.

[0078] In one embodiment, the noise reduction effect of the aforementioned noise reduction signal may be further verified. If it does not meet the preset value, the noise is re-collected and the noise reduction signal is generated; otherwise, the noise reduction signal is stored in the memory of the range hood.

[0079] Specifically, the noise at the user's location (the noise after being reduced by the noise reduction signal), i.e., the second noise, is collected again; it is determined whether the second noise is lower than a preset value; when the second noise is lower than the preset value, the range hood stores the noise reduction signal and generates a control instruction to control the range hood to enter the next working mode. When the second noise is higher than the preset value, a noise reduction signal is regenerated according to the second noise and sent to the range hood, and the range hood controls the speaker to emit the corresponding audio according to the regenerated noise reduction signal.

[0080] In one embodiment, the mobile device 20 can also determine the timing of collecting noise according to the distance from the range hood 10. Specifically, the current distance between the mobile device 20 and the range hood 10 can be obtained first, and when the current distance is less than or equal to the preset distance, the mobile device 20 collects the first noise and generates the noise reduction signal. The distance can be obtained by a sensor, such as a radar, and the camera device can also be combined with the detection device of the mobile device.

[0081] The embodiment of the present invention also discloses a noise reduction system, which includes a range hood 10 and a mobile device 20 connected to the range hood for communication, wherein the communication method between the range hood and the mobile device is as described above. Figure 5 And the related description content is implemented.

[0082] Figure 6 A complete workflow for updating the noise reduction signal is shown.

[0083] In S600, the mobile device is connected to the range hood wirelessly and controls the range hood to operate in low wind speed mode;

[0084] S602, the mobile device collects noise at the user's location, generates a noise reduction signal using an algorithm, and sends the noise reduction signal to the range hood;

[0085] S604, the range hood controls the speaker through the control module to play the audio corresponding to the noise reduction signal;

[0086] S606, the mobile device collects the noise at the user's location again, and determines whether the noise is lower than a preset target;

[0087] If not, return to step S602 to re-collect the noise and generate a corresponding noise reduction signal;

[0088] S608, if so, the corresponding noise reduction signal in the working mode is stored in the memory, and then the mobile device controls the range hood to work in the next working mode such as medium wind mode or high wind speed mode, and generates the corresponding noise reduction signal in the same way as described above.

[0089] An embodiment of the present invention further provides a computer-readable storage medium, which is a non-volatile storage medium or a non-transient storage medium, on which a computer program is stored. When the computer program is executed by a processor, the steps of the control method provided in any of the above embodiments are executed.

[0090] Although specific embodiments have been described above, these embodiments are not intended to limit the scope of the present disclosure, even when only a single embodiment is described with respect to specific features. The feature examples provided in this disclosure are intended to be illustrative rather than limiting, unless otherwise stated. In specific implementations, the technical features of one or more dependent claims may be combined with the technical features of the independent claims, and the technical features from the corresponding independent claims may be combined in any appropriate manner rather than just by the specific combinations listed in the claims.

Claims

1. A noise reduction method, applied to a range hood, wherein the range hood includes at least one working mode, characterized in that: The method comprises: receiving a control instruction including an operating mode; In response to the control instruction, the range hood is controlled to operate in the operating mode; Receive a noise reduction signal corresponding to the working mode, and control the speaker to emit corresponding audio according to the noise reduction signal; wherein the noise reduction signal is generated according to the first noise at the user's location collected by the mobile device when the range hood is working in the working mode, and the noise reduction signal is opposite in phase to the collected first noise.

2. The method according to claim 1, characterized in that The method further includes: when the second noise collected in the working mode is lower than a preset value, storing a noise reduction signal corresponding to the working mode, wherein the second noise is the noise at the user's location after the speaker emits the corresponding audio according to the noise reduction signal.

3. The method according to claim 2, characterized in that When the second noise collected in the working mode is higher than a preset value, a noise reduction signal regenerated according to the second noise is obtained, and the range hood is controlled to emit a corresponding audio according to the regenerated noise reduction signal.

4. The method according to claim 1, characterized in that The method further includes, when the second noise collected in the working mode is lower than a preset value, receiving a control instruction containing another working mode, and controlling the range hood to enter the other working mode.

5. The method according to claim 1, characterized in that The noise reduction signal is generated by a mobile device or a server, and the range hood receives the noise reduction signal corresponding to the working mode from the mobile device or the server through a communication module.

6. The method according to claim 1, characterized in that Before the mobile device collects the first noise at the user's location, the current distance between the mobile device and the range hood is obtained, and when the current distance is less than or equal to the preset distance, the mobile device collects the first noise and generates the noise reduction signal.

7. The method according to any one of claims 1 to 6, characterized in that: The working modes include: at least one of a low wind speed mode, a medium wind speed mode, a high wind speed mode and a stir-fry mode.

8. A noise reduction method, applied to a mobile device, characterized in that: The method comprises: Sending a control instruction including an operating mode to the range hood, wherein the range hood includes at least one operating mode; When the range hood operates in the operating mode, a first noise is collected at the location of the user; generating a noise reduction signal according to the first noise; Sending the noise reduction signal to the range hood to control the speaker of the range hood to emit corresponding audio; The audio is in opposite phase to the collected first noise.

9. The method according to claim 8, characterized in that The method also includes: collecting the noise at the user's location again, namely, the second noise; determining whether the second noise is lower than a preset value; and generating a control instruction to control the range hood to enter the next working mode when the second noise is lower than the preset value.

10. The method according to claim 9, characterized in that When the second noise collected in the working mode is higher than a preset value, a noise reduction signal is regenerated according to the second noise and sent to the range hood, so that the range hood emits corresponding audio according to the regenerated noise reduction signal.

11. The method according to claim 8, characterized in that The method also includes: receiving a control instruction for updating a noise reduction signal corresponding to the working mode.

12. The method according to claim 8, characterized in that Before the mobile device collects the first noise at the user's location, the current distance between the mobile device and the range hood is obtained, and when the current distance is less than or equal to the preset distance, the first noise is collected and the noise reduction signal is generated.

13. The method according to any one of claims 8 to 12, characterized in that: The working modes include: at least one of a low wind speed mode, a medium wind speed mode, a high wind speed mode and a stir-fry mode.

14. A noise reduction system, comprising a range hood and a mobile device connected to the range hood, characterized in that: The range hood is used to execute the method according to any one of claims 1 to 7, and the mobile device is used to execute the method according to any one of claims 8 to 13.

15. A range hood, comprising a memory and a processor coupled to the memory, characterized in that: The memory is used to store a computer program, and the processor is used to run the computer program, so that the range hood performs the method according to any one of claims 1 to 7.

16. A mobile device comprising a memory and a processor coupled to the memory, characterized in that: The memory is used to store a computer program, and the processor is used to run the computer program, so that the mobile device performs the method according to any one of claims 8 to 13.

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