Range hood noise reduction method and device, range hood and storage medium

Abstract

The invention discloses a range hood noise reduction method and a range hood, and relates to the technical field of artificial intelligence, the method comprises the following steps: obtaining air outlet data of the range hood based on a sensor arranged at an air outlet of the range hood during operation of the range hood, and determining the change rate of the air outlet data; under the condition that it is determined that the change rate is not larger than a change rate threshold value and the duration is not smaller than a time threshold value, control parameters are determined in an air outlet data-control parameter corresponding relation table according to the air outlet data; and controlling a reverse sound generator to generate reverse sound based on the control parameters so as to counteract the operation noise of the range hood. According to the technical scheme, the control parameters are determined in the air outlet data-control parameter corresponding relation table according to the air outlet data of the range hood, the reverse sound generator is controlled to make the reverse sound based on the control parameters so as to counteract the operation noise of the range hood, noise reduction of the range hood is achieved without a sound sensor, and the noise reduction efficiency is improved. The internal space of the range hood is prevented from being occupied, and the noise reduction effect of the range hood is improved.

Description

Technical Field

[0001] The embodiments of the present invention relate to the field of smart home technology, and in particular to a range hood noise reduction method, device, range hood, and storage medium. Background Art

[0002] Range hoods have become a must-have in most family kitchens. Through the operation of range hoods, the fumes in the kitchen environment can be discharged in time, keeping the kitchen environment and even the air of the entire indoor environment clean. Range hoods usually generate noise when working, which affects the user experience. In order to reduce the adverse effects of the noise generated by the range hood when working on the user, active noise reduction methods are currently mainly used for noise reduction processing.

[0003] In the prior art, the range hood noise is collected by a noise collector arranged inside the range hood main body, and a sound signal generator arranged inside the range hood main body generates a reverse sound for offsetting the range hood noise. The noise reduction of the range hood is achieved by using the reverse sound to offset the range hood noise.

[0004] However, the noise collector used to collect the range hood noise will occupy the internal space of the range hood, affect the fan flow field, indirectly increase the fan noise, and affect the noise reduction effect of the range hood. Summary of the invention

[0005] The present invention provides a range hood noise reduction method, a range hood noise reduction device, a range hood and a storage medium, so as to improve the noise reduction effect of the range hood.

[0006] In a first aspect, an embodiment of the present invention provides a range hood noise reduction method, comprising:

[0007] When the range hood is running, the air outlet data of the range hood is obtained based on a sensor disposed at the air outlet of the range hood, and a change rate of the air outlet data is determined;

[0008] When it is determined that the change rate is not greater than the change rate threshold and the duration is not less than the time threshold, determining the control parameter in a correspondence table between the wind output data and the control parameter according to the wind output data;

[0009] Based on the control parameter, the reverse sound generator is controlled to emit reverse sound to offset the operating noise of the range hood.

[0010] The technical solution of an embodiment of the present invention provides a method for reducing noise of a range hood, comprising: when the range hood is running, obtaining the air outlet data of the range hood based on a sensor arranged at the air outlet of the range hood, and determining the change rate of the air outlet data; when it is determined that the change rate is not greater than a change rate threshold and the duration is not less than a time threshold, determining control parameters in a correspondence table of air outlet data-control parameters according to the air outlet data; and controlling a reverse sound generator to emit a reverse sound based on the control parameters to offset the operating noise of the range hood. The above technical scheme obtains the air outlet data of the range hood based on the sensor arranged at the air outlet of the range hood when the range hood is running, and determines the change rate of the air outlet data, so as to realize real-time monitoring of the air outlet data of the range hood when the range hood is running; when it is determined that the change rate of the air outlet data is not greater than the change rate threshold and the duration is not less than the time threshold, it is determined that the operating state of the range hood is stable; the control parameters of the reverse sound generator are determined in the correspondence table of the air outlet data-control parameters according to the air outlet data of the range hood; the reverse sound generator is controlled to emit a reverse sound based on the control parameters to offset the operating noise of the range hood; the control parameters of the reverse sound generator for emitting the reverse sound required to reduce the operating noise are determined without the need for a sound sensor; the reverse sound generator is controlled to emit a reverse sound based on the control parameters to offset the operating noise of the range hood, thereby avoiding the occupation of the internal space of the range hood by the sound sensor and improving the noise reduction effect of the range hood.

[0011] Furthermore, the sensor is a pressure sensor or a wind force sensor, and the wind output data is wind output pressure or wind output force.

[0012] Furthermore, when the range hood is in operation, the method further comprises:

[0013] Obtain the current working condition and the operating gear of the range hood.

[0014] Furthermore, before determining the control parameter in the correspondence table of the wind output data-control parameter according to the wind output data, the method further includes:

[0015] A correspondence table of the air outlet data-control parameters corresponding to the current operating condition and the operating gear is determined according to the current operating condition and the operating gear.

[0016] Furthermore, before determining the correspondence table of the air outlet data-control parameters corresponding to the current operating condition and the operating gear according to the current operating condition and the operating gear, it also includes:

[0017] When the range hood is operated at each of the operating gears under each of the operating conditions, the air outlet data is obtained based on the sensor, and the reverse sound generator is controlled to emit reverse sound to offset the operating noise of the range hood;

[0018] Acquiring sound information while adjusting the operating parameters of the reverse sound generator, and determining the operating parameters of the reverse sound generator as the control parameters of the reverse sound generator when the sound information meets the preset sound conditions;

[0019] A correspondence table between the air outlet data and the control parameters corresponding to each operating gear under each operating condition is constructed based on the air outlet data and the control parameters corresponding to each operating gear under each operating condition.

[0020] Furthermore, when the reverse sound generator is controlled to emit sound based on the control parameter to offset the operating noise of the range hood, it also includes:

[0021] When it is monitored that the current operating condition and / or the operating gear changes, the process returns to execute the corresponding relationship table of the air outlet data-control parameters corresponding to the current operating condition and the operating gear according to the current operating condition and the operating gear.

[0022] Furthermore, the spectrum of the reverse sound emitted by the reverse sound generator has the same shape as the spectrum of the operating noise of the range hood and has an opposite phase, the sound information includes sound pressure, and the preset sound condition is that the sound pressure is less than a sound pressure threshold.

[0023] In a second aspect, an embodiment of the present invention further provides a range hood noise reduction device, comprising:

[0024] an acquisition module, configured to acquire the air outlet data of the range hood based on a sensor disposed at the air outlet of the range hood when the range hood is in operation, and determine a change rate of the air outlet data;

[0025] a determination module, configured to determine the control parameter in a correspondence table between wind output data and control parameters according to the wind output data when it is determined that the change rate is not greater than the change rate threshold and the duration is not less than the time threshold;

[0026] The execution module is used to control the reverse sound generator to emit reverse sound based on the control parameters to offset the operating noise of the range hood.

[0027] In a third aspect, an embodiment of the present invention further provides a range hood, the range hood comprising:

[0028] one or more processors;

[0029] A storage device for storing one or more programs;

[0030] A sensor used to obtain air outlet data of the range hood;

[0031] A reverse sound generator, used for producing a reverse sound;

[0032] When the one or more programs are executed by the one or more processors, the one or more processors implement the range hood noise reduction method as described in any one of the first aspects.

[0033] In a fourth aspect, an embodiment of the present invention further provides a storage medium comprising computer executable instructions, wherein the computer executable instructions, when executed by a computer processor, are used to execute the range hood noise reduction method as described in any one of the first aspects.

[0034] In a fifth aspect, the present application provides a computer program product, which includes computer instructions. When the computer instructions are executed on a computer, the computer executes the range hood noise reduction method provided in the first aspect.

[0035] It should be noted that the above computer instructions may be stored in whole or in part on a computer-readable storage medium, wherein the computer-readable storage medium may be packaged together with the processor of the range hood noise reduction device, or may be packaged separately from the processor of the range hood noise reduction device, and this application does not limit this.

[0036] The description of the second, third, fourth and fifth aspects in this application can refer to the detailed description of the first aspect; and the beneficial effects of the description of the second, third, fourth and fifth aspects can refer to the beneficial effect analysis of the first aspect, which will not be repeated here.

[0037] In this application, the name of the range hood noise reduction device does not limit the device or functional module itself. In actual implementation, these devices or functional modules may appear with other names. As long as the functions of each device or functional module are similar to those of this application, they fall within the scope of the claims of this application and their equivalent technologies.

[0038] These and other aspects of the present application will become more apparent from the following description. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0040] Figure 1 A flow chart of a range hood noise reduction method provided by an embodiment of the present invention;

[0041] Figure 2 A flow chart of another range hood noise reduction method provided by an embodiment of the present invention;

[0042] Figure 3 A schematic structural diagram of a range hood noise reduction device provided by an embodiment of the present invention;

[0043] Figure 4 A schematic structural diagram of a range hood provided in an embodiment of the present invention. DETAILED DESCRIPTION

[0044] The present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It is to be understood that the specific embodiments described herein are only used to explain the present invention, rather than to limit the present invention. It should also be noted that, for ease of description, only parts related to the present invention, rather than all structures, are shown in the accompanying drawings.

[0045] The term "and / or" in this article is merely a description of the association relationship of associated objects, indicating that three relationships may exist. For example, A and / or B can mean: A exists alone, A and B exist at the same time, and B exists alone.

[0046] The terms "first" and "second" and the like in the specification and drawings of this application are used to distinguish different objects, or to distinguish different processing of the same object, rather than to describe a specific order of objects.

[0047] In addition, the terms "including" and "having" and any variations thereof mentioned in the description of the present application are intended to cover non-exclusive inclusions. For example, a process, method, system, product or device that includes a series of steps or units is not limited to the listed steps or units, but may optionally include other steps or units that are not listed, or may optionally include other steps or units that are inherent to these processes, methods, products or devices.

[0048] It should be mentioned before discussing exemplary embodiments in more detail that some exemplary embodiments are described as processes or methods depicted as flow charts. Although the flow charts describe various operations (or steps) as sequential processes, many operations therein can be implemented in parallel, concurrently or simultaneously. In addition, the order of various operations can be rearranged. The process can be terminated when its operation is completed, but can also have additional steps not included in the accompanying drawings. The process can correspond to methods, functions, procedures, subroutines, subprograms, etc. In addition, the embodiments in the present invention and the features in the embodiments can be combined with each other without conflict.

[0049] It should be noted that, in the embodiments of the present application, words such as "exemplary" or "for example" are used to indicate examples, illustrations or descriptions. Any embodiment or design described as "exemplary" or "for example" in the embodiments of the present application should not be interpreted as being more preferred or more advantageous than other embodiments or designs. Specifically, the use of words such as "exemplary" or "for example" is intended to present related concepts in a specific way.

[0050] In the description of the present application, unless otherwise specified, “plurality” means two or more.

[0051] Figure 1 This is a flow chart of a range hood noise reduction method provided by an embodiment of the present invention. This embodiment can be applied to situations where the range hood noise reduction effect needs to be improved. The method can be performed by a range hood noise reduction device, such as Figure 1 As shown, the specific steps include:

[0052] Step 110: When the range hood is running, air outlet data of the range hood is obtained based on a sensor disposed at an air outlet of the range hood, and a change rate of the air outlet data is determined.

[0053] The sensor may be a pressure sensor or a wind sensor, the wind sensor may be a wind speed sensor or a wind volume sensor, and accordingly, the wind output data may be wind output pressure or wind output wind force, and the wind output wind force may be wind output wind speed or wind output volume.

[0054] Specifically, during the operation of the range hood, the air outlet data of the range hood can be obtained based on the sensor arranged at the air outlet of the range hood. When the sensor is a pressure sensor, the air outlet pressure of the range hood can be obtained based on the pressure sensor. When the sensor is a wind force sensor, the air outlet wind force of the range hood can be obtained based on the wind force sensor. When the wind force sensor is a wind speed sensor, the air outlet wind speed of the range hood can be obtained based on the wind speed sensor. When the wind force sensor is an air volume sensor, the air outlet air volume of the range hood can be obtained based on the air volume sensor. Furthermore, the change rate of the air outlet data can be determined. Specifically, the data difference between the current air outlet data at the current moment and the previous air outlet data at the previous moment and the time difference between the current moment and the previous moment can be determined, and then the change rate of the air outlet data can be determined according to the ratio of the data difference and the time difference.

[0055] When the operating data is the speed of the motor, the speed difference between the current speed of the motor at the current moment and the previous speed at the previous moment and the time difference between the current moment and the previous moment can be determined, and then the speed change rate can be determined based on the ratio of the speed difference to the time difference.

[0056] In the embodiment of the present invention, when the range hood is running, the air outlet data of the range hood is obtained based on the sensor arranged at the air outlet of the range hood, and the change rate of the air outlet data is determined to achieve real-time monitoring of the air outlet data of the range hood when the range hood is running.

[0057] Step 120: When it is determined that the change rate is not greater than the change rate threshold and the duration is not less than the time threshold, determine the control parameter in the correspondence table of the wind output data-control parameter according to the wind output data.

[0058] The change rate is used to measure the fluctuation of the air output data. If the change rate is not greater than the change rate threshold, and the duration of the change rate not greater than the change rate threshold is not less than the time threshold, it can be determined that the operation data is stable, and then the range hood operation state can be determined to be stable. The specific values ​​of the change rate threshold and the time threshold can be set according to actual needs and are not specifically limited here.

[0059] Specifically, when it is determined that the change rate of the air outlet data is not greater than the change rate threshold and the duration is not less than the time threshold, it can be determined that the range hood operation state is stable. When it is determined that the range hood operation is stable, a reverse sound generator can be used to generate a reverse sound to offset the operation noise of the range hood. In order to achieve the best effect of offsetting the operation noise, it is necessary to determine the control parameters of the reverse sound generator adapted to the operation noise.

[0060] It should be noted that the range hood has a correspondence table of air outlet data-control parameters stored in advance. The correspondence table of air outlet data-control parameters is constructed by conducting noise reduction experiments on the range hood before the range hood leaves the factory. Specifically, the range hood obtains the air outlet data of the range hood and the noise information of the operating noise based on the sensor set at the air outlet of the range hood when the range hood is running at each gear under each working condition. For the range hood running at the current gear under the current working condition, the sound information of the reverse sound required for noise reduction of the operating noise is determined according to the noise information of the operating noise. The noise information can be understood as the spectrum of the operating noise, and the sound information of the reverse sound can be understood as the spectrum of the reverse sound. The spectrum shapes of the operating noise and the reverse sound are consistent and the phases are opposite. Furthermore, the control parameters of the reverse sound generator can be determined according to the sound information of the reverse sound. After determining the control parameters of the reverse sound generator in the range hood under each working condition based on the operation of each gear, the correspondence table of air outlet data-control parameters can be constructed according to the air outlet data of the range hood under each working condition based on the operation of each gear and the control parameters of the reverse sound generator.

[0061] Therefore, when it is determined that the operating state of the range hood is stable, the control parameters of the reverse sound generator required to reduce the operating noise of the range hood can be determined according to the air outlet data of the range hood in the correspondence table of air outlet data-control parameters.

[0062] In an embodiment of the present invention, when it is determined that the range hood is operating stably, the control parameters of the reverse sound generator are determined in a correspondence table of air outlet data-control parameters according to the air outlet data of the range hood, and the control parameters of the reverse sound generator for emitting the reverse sound required to reduce the operating noise are determined without the need for a sound sensor.

[0063] Step 130: Based on the control parameters, control the reverse sound generator to emit reverse sound to offset the operating noise of the range hood.

[0064] Specifically, after determining the control parameters of the reverse sound generator, the reverse sound generator can be controlled to emit a reverse sound based on the control parameters. Since the frequency spectrum shape of the reverse sound and the operating noise are consistent and the phases are opposite, the reverse sound can offset the operating noise and achieve noise reduction for the range hood.

[0065] In an embodiment of the present invention, a reverse sound generator is controlled based on control parameters to emit a reverse sound to offset the operating noise of the range hood, thereby achieving noise reduction of the range hood without the need for a sound sensor, avoiding the sound sensor from occupying the internal space of the range hood, and improving the noise reduction effect of the range hood.

[0066] The range hood noise reduction method provided in an embodiment of the present invention includes: when the range hood is running, obtaining the air outlet data of the range hood based on a sensor arranged at the air outlet of the range hood, and determining the change rate of the air outlet data; when it is determined that the change rate is not greater than a change rate threshold and the duration is not less than a time threshold, determining control parameters in a correspondence table of air outlet data-control parameters according to the air outlet data; and controlling a reverse sound generator to emit a reverse sound based on the control parameters to offset the operating noise of the range hood. The above technical scheme obtains the air outlet data of the range hood based on the sensor arranged at the air outlet of the range hood when the range hood is running, and determines the change rate of the air outlet data, so as to realize real-time monitoring of the air outlet data of the range hood when the range hood is running; when it is determined that the change rate of the air outlet data is not greater than the change rate threshold and the duration is not less than the time threshold, it is determined that the operating state of the range hood is stable; the control parameters of the reverse sound generator are determined in the correspondence table of the air outlet data-control parameters according to the air outlet data of the range hood; the reverse sound generator is controlled to emit a reverse sound based on the control parameters to offset the operating noise of the range hood; the control parameters of the reverse sound generator for emitting the reverse sound required to reduce the operating noise are determined without the need for a sound sensor; the reverse sound generator is controlled to emit a reverse sound based on the control parameters to offset the operating noise of the range hood, thereby avoiding the occupation of the internal space of the range hood by the sound sensor and improving the noise reduction effect of the range hood.

[0067] Figure 2This is a flow chart of another range hood noise reduction method provided by an embodiment of the present invention. This embodiment is specific based on the above embodiment. Figure 2 As shown, in this embodiment, the method may further include:

[0068] Step 210: When the range hood is operated at each operating gear under each operating condition, the air outlet data is obtained based on the sensor, and the reverse sound generator is controlled to emit a reverse sound to offset the operating noise of the range hood.

[0069] Specifically, when conducting a noise reduction experiment on the range hood before it leaves the factory, the range hood can be operated under various working conditions and at various operating gears by obtaining the air outlet data of the range hood based on a sensor arranged at the air outlet of the range hood, and at the same time controlling the reverse sound generator to emit a reverse sound to offset the operating noise of the range hood.

[0070] Step 220: Acquire sound information while adjusting the operating parameters of the reverse sound generator, and determine the operating parameters of the reverse sound generator as the control parameters of the reverse sound generator when the sound information meets the preset sound conditions.

[0071] The sound information includes sound pressure, and the preset sound condition is that the sound pressure is less than a sound pressure threshold.

[0072] Specifically, the reverse sound can be adjusted by adjusting the operating parameters of the reverse sound generator, and the sound information of the current environment can be obtained at the same time. If the sound information meets the preset sound conditions, the operating parameters of the reverse sound generator at this time will be determined as the control parameters of the reverse sound generator, so as to determine the control parameters required for the reverse sound generator to reduce the noise of the range hood operating at various operating gears under various working conditions.

[0073] In an embodiment of the present invention, when the range hood is operating in various operating gears under various working conditions, the reverse sound generator is controlled to emit reverse sound to offset the operating noise of the range hood. By adjusting the operating parameters of the reverse sound generator so that the sound information of the environment in which the range hood is located meets the preset sound conditions, a noise reduction experiment for the range hood is achieved.

[0074] Step 230: construct a correspondence table of the air outlet data-control parameters corresponding to each of the operating gears under each of the operating conditions based on the air outlet data and the control parameters corresponding to each of the operating gears under each of the operating conditions.

[0075] Specifically, after determining the control parameters of the reverse sound generator when the range hood is running at various operating gears under various operating conditions, a correspondence table of air outlet data-control parameters corresponding to each operating gear under each operating condition can be constructed based on the air outlet data when the range hood is running at various operating gears under various operating conditions and the control parameters of the reverse sound generator.

[0076] In the embodiment of the present invention, a correspondence table between the air outlet data and the control parameters of the range hood during operation is constructed based on each operating gear under each working condition.

[0077] Step 240, when the range hood is running, the current operating condition and the operating gear of the range hood are obtained, the air outlet data of the range hood is obtained based on a sensor disposed at the air outlet of the range hood, and the change rate of the air outlet data is determined.

[0078] Specifically, during the operation of the range hood, the current operating condition and the operating gear of the range hood can be obtained. The air outlet data of the range hood can also be obtained based on the sensor arranged at the air outlet of the range hood, and the change rate of the air outlet data can be determined. Specifically, the data difference between the current operating data of the motor at the current moment and the previous operating data at the previous moment and the time difference between the current moment and the previous moment can be determined, and then the change rate of the operating data can be determined according to the ratio of the data difference and the time difference.

[0079] The operating data is the outlet pressure or the outlet wind force, and the outlet wind force is the outlet wind speed or the outlet air volume. For the outlet pressure, the pressure difference between the current outlet pressure of the range hood at the current moment and the previous outlet pressure at the previous moment and the time difference between the current moment and the previous moment can be determined, and then the rate of change of the outlet pressure can be determined according to the ratio of the pressure difference and the time difference. For the outlet wind speed, the wind speed difference between the current outlet wind speed of the range hood at the current moment and the previous outlet wind speed at the previous moment and the time difference between the current moment and the previous moment can be determined, and then the rate of change of the outlet wind speed can be determined according to the ratio of the wind speed difference and the time difference. For the outlet air volume, the air volume difference between the current outlet air volume of the range hood at the current moment and the previous outlet air volume at the previous moment and the time difference between the current moment and the previous moment can be determined, and then the rate of change of the outlet air volume can be determined according to the ratio of the air volume difference and the time difference.

[0080] In the embodiment of the present invention, the air outlet data of the range hood is obtained when the range hood is running, and the change rate of the air outlet data is determined, so as to realize real-time monitoring of the air outlet data of the range hood when the range hood is running.

[0081] Step 250: Determine a correspondence table of the air outlet data-control parameters corresponding to the current operating condition and the operating gear according to the current operating condition and the operating gear.

[0082] Specifically, since the aforementioned correspondence table of the air outlet data-control parameters of the range hood under various working conditions and based on each operating gear has been constructed, the correspondence table of the air outlet data-control parameters corresponding to the current working condition and the operating gear can be determined according to the current working condition and the operating gear. Based on the correspondence table of the air outlet data-control parameters, the range hood can quickly determine the control parameters of the reverse sound generator according to the air outlet data.

[0083] In the embodiment of the present invention, a corresponding relationship table of air outlet data and control parameters corresponding to the current working condition and the operating gear is determined, so as to provide a data basis for the range hood to determine the control parameters of the reverse sound generator according to the air outlet data.

[0084] Step 260: When it is determined that the change rate is not greater than the change rate threshold and the duration is not less than the time threshold, determine the control parameter in the correspondence table of the wind output data-control parameter according to the wind output data.

[0085] Specifically, when it is determined that the change rate of the air outlet data is not greater than the change rate threshold and the duration is not less than the time threshold, it is determined that the operating state of the range hood is stable. At this time, the control parameters can be determined in the correspondence table of the air outlet data-control parameters according to the air outlet data to determine the control parameters of the reverse sound generator required to reduce the operating noise of the range hood.

[0086] Step 270: Based on the control parameters, control the reverse sound generator to emit reverse sound to offset the operating noise of the range hood.

[0087] The frequency spectrum of the reverse sound emitted by the reverse sound generator has the same shape as the frequency spectrum of the operating noise of the range hood and has an opposite phase.

[0088] Specifically, after determining the control parameters of the reverse sound generator, the reverse sound generator can be controlled to emit a reverse sound based on the control parameters. Since the frequency spectrum shape of the reverse sound and the operating noise are consistent and the phases are opposite, the reverse sound can offset the operating noise and achieve noise reduction for the range hood.

[0089] In one implementation, when executing step 270, it also includes:

[0090] When it is monitored that the current operating condition and / or the operating gear changes, the process returns to execute the corresponding relationship table of the air outlet data-control parameters corresponding to the current operating condition and the operating gear according to the current operating condition and the operating gear.

[0091] When it is monitored that the current operating condition and / or operating gear has changed, it is necessary to re-determine the correspondence table of the air outlet data-control parameters corresponding to the current operating condition and operating gear based on the current operating condition and operating gear, that is, you can return to execute step 250 and redetermine the control parameters of the reverse sound generator to ensure that the reverse sound emitted by the reverse sound generator can offset the operating noise of the range hood with the best effect.

[0092] In the embodiment of the present invention, the reverse sound generator is controlled to emit reverse sound based on the control parameters to offset the operating noise of the range hood, and the noise reduction of the range hood is achieved without the need for a sound sensor, thereby avoiding the occupation of the internal space of the range hood by the sound sensor, and improving the noise reduction effect of the range hood. In addition, when it is monitored that the current working condition and / or the operating gear have changed, the corresponding relationship table of the air outlet data-control parameters corresponding to the current working condition and the operating gear can be re-determined according to the changed current working condition and the operating gear, so that the control parameters of the reverse sound generator determined by the range hood according to the corresponding relationship table of the air outlet data-control parameters corresponding to the current working condition and the operating gear can control the reverse sound emitted by the reverse sound generator to offset the operating noise of the range hood with the best effect.

[0093] The range hood noise reduction method provided by an embodiment of the present invention comprises: when the range hood is operating based on each of the operating gears under each of the operating conditions, the air outlet data is obtained based on the sensor, and the reverse sound generator is controlled to emit reverse sound to offset the operating noise of the range hood; while adjusting the operating parameters of the reverse sound generator, sound information is obtained, and when the sound information meets the preset sound conditions, the operating parameters of the reverse sound generator are determined as the control parameters of the reverse sound generator; based on the air outlet data corresponding to each of the operating gears under each of the operating conditions and the control parameters, a control parameter of the air outlet data corresponding to each of the operating gears under each of the operating conditions is constructed. Correspondence table; obtaining the current working condition and the operating gear of the range hood when the range hood is running, and obtaining the air outlet data of the range hood based on the sensor arranged at the air outlet of the range hood, and determining the change rate of the air outlet data; determining the correspondence table of the air outlet data-control parameters corresponding to the current working condition and the operating gear according to the current working condition and the operating gear; when it is determined that the change rate is not greater than the change rate threshold and the duration is not less than the time threshold, determining the control parameters in the correspondence table of the air outlet data-control parameters according to the air outlet data; based on the control parameters, controlling the reverse sound generator to emit a reverse sound to offset the operating noise of the range hood.According to the above technical scheme, when the range hood is running at various operating gears under various working conditions, the reverse sound generator is controlled to emit reverse sound to offset the operating noise of the range hood. The operating parameters of the reverse sound generator are adjusted so that the sound information of the environment in which the range hood is located meets the preset sound conditions. When the sound information meets the preset sound conditions, the operating parameters of the reverse sound generator are determined as the control parameters of the reverse sound generator. The correspondence between the air outlet data of the range hood and the control parameters of the reverse sound generator when the range hood is running at various operating gears under various working conditions is determined by performing noise reduction experiments on the range hood. Then, a correspondence table of air outlet data-control parameters corresponding to each operating gear under each working condition can be constructed according to the air outlet data and control parameters corresponding to each operating gear of the range hood under each working condition. The air outlet data of the range hood is obtained when the range hood is running, and the air outlet is determined. The change rate of the data is used to realize real-time monitoring of the air outlet data of the range hood when the range hood is running. When it is determined that the change rate of the air outlet data is not greater than the change rate threshold and the duration is not less than the time threshold, it is determined that the operating state of the range hood is stable. The control parameters of the reverse sound generator are determined in the correspondence table of the air outlet data-control parameters according to the air outlet data of the range hood. The reverse sound generator is controlled to emit a reverse sound based on the control parameters to offset the operating noise of the range hood. The control parameters of the reverse sound generator for emitting the reverse sound required for noise reduction of the operating noise are determined without the need for a sound sensor. The reverse sound generator is controlled to emit a reverse sound based on the control parameters to offset the operating noise of the range hood, thereby avoiding the occupation of the internal space of the range hood by the sound sensor, further reducing the interference to the flow field of the fan, and improving the noise reduction effect of the range hood.

[0094] Figure 3 This is a schematic diagram of the structure of a range hood noise reduction device provided by an embodiment of the present invention, which can be applied to situations where the noise reduction effect of the range hood needs to be improved. The device can be implemented by software and / or hardware and is generally integrated in the range hood.

[0095] like Figure 3 As shown, the device comprises:

[0096] An acquisition module 310 is used to acquire the air outlet data of the range hood based on a sensor disposed at the air outlet of the range hood when the range hood is running, and determine a change rate of the air outlet data;

[0097] A determination module 320, configured to determine a control parameter in a correspondence table of wind output data-control parameters according to the wind output data when it is determined that the change rate is not greater than a change rate threshold and the duration is not less than a time threshold;

[0098] The execution module 330 is used to control the reverse sound generator to emit reverse sound based on the control parameter to offset the operating noise of the range hood.

[0099] The range hood noise reduction device provided in the present embodiment obtains the air outlet data of the range hood based on a sensor arranged at the air outlet of the range hood when the range hood is running, and determines the change rate of the air outlet data; when it is determined that the change rate is not greater than the change rate threshold and the duration is not less than the time threshold, determines the control parameters in the correspondence table of the air outlet data-control parameters according to the air outlet data; and controls the reverse sound generator to emit a reverse sound based on the control parameters to offset the operating noise of the range hood. The above technical scheme obtains the air outlet data of the range hood based on the sensor arranged at the air outlet of the range hood when the range hood is running, and determines the change rate of the air outlet data, so as to realize real-time monitoring of the air outlet data of the range hood when the range hood is running; when it is determined that the change rate of the air outlet data is not greater than the change rate threshold and the duration is not less than the time threshold, it is determined that the operating state of the range hood is stable; the control parameters of the reverse sound generator are determined in the correspondence table of the air outlet data-control parameters according to the air outlet data of the range hood; the reverse sound generator is controlled to emit a reverse sound based on the control parameters to offset the operating noise of the range hood; the control parameters of the reverse sound generator for emitting the reverse sound required to reduce the operating noise are determined without the need for a sound sensor; the reverse sound generator is controlled to emit a reverse sound based on the control parameters to offset the operating noise of the range hood, thereby avoiding the occupation of the internal space of the range hood by the sound sensor and improving the noise reduction effect of the range hood.

[0100] In one implementation, the sensor is a pressure sensor or a wind force sensor, and the wind output data is wind output pressure or wind output force.

[0101] Based on the above embodiment, the acquisition module 310 is further used for:

[0102] When the range hood is running, the current working condition and the running gear of the range hood are obtained.

[0103] Based on the above embodiment, the device further includes:

[0104] An execution module is used to determine the correspondence table of the air outlet data-control parameters corresponding to the current operating condition and the operating gear according to the current operating condition and the operating gear before determining the control parameters in the correspondence table of the air outlet data-control parameters according to the air outlet data.

[0105] Based on the above embodiment, the device further includes:

[0106] A construction module is provided, wherein when the range hood is operated based on each of the operating gears under each of the operating conditions, the air outlet data is obtained based on the sensor, and the reverse sound generator is controlled to emit reverse sound to offset the operating noise of the range hood; sound information is obtained while adjusting the operating parameters of the reverse sound generator, and the operating parameters of the reverse sound generator are determined as the control parameters of the reverse sound generator when the sound information meets the preset sound conditions; and a correspondence table between the air outlet data and the control parameters corresponding to each of the operating gears under each of the operating conditions is constructed based on the air outlet data and the control parameters corresponding to each of the operating gears under each of the operating conditions.

[0107] Based on the above embodiment, the execution module 330 is further used for:

[0108] When the reverse sound generator is controlled to emit sound based on the control parameters to offset the operating noise of the range hood, if it is monitored that the current operating condition and / or the operating gear have changed, the process returns to execute the correspondence table of the air outlet data-control parameters corresponding to the current operating condition and the operating gear based on the current operating condition and the operating gear.

[0109] In one embodiment, the sound information includes sound pressure, the preset sound condition is that the sound pressure is less than a sound pressure threshold, and the spectrum of the reverse sound emitted by the reverse sound generator has the same shape as the spectrum of the operating noise of the range hood and has an opposite phase.

[0110] The range hood noise reduction device provided in the embodiment of the present invention can execute the range hood noise reduction method provided in any embodiment of the present invention, and has the corresponding functional modules and beneficial effects for executing the range hood noise reduction method.

[0111] It is worth noting that in the above-mentioned embodiment of the range hood noise reduction device, the various units and modules included are only divided according to functional logic, but are not limited to the above-mentioned division, as long as the corresponding functions can be achieved; in addition, the specific names of the functional units are only for the convenience of distinguishing each other, and are not used to limit the scope of protection of the present invention.

[0112] Figure 4 A schematic structural diagram of a range hood provided in an embodiment of the present invention. Figure 4 A block diagram of an exemplary range hood 4 suitable for implementing embodiments of the present invention is shown. Figure 4 The range hood 4 shown is only an example and should not bring any limitation to the functions and scope of use of the embodiments of the present invention.

[0113] like Figure 4As shown, the range hood 4 is in the form of a general purpose computing electronic device. The components of the range hood 4 may include, but are not limited to: one or more processors or processing units 16, a system memory 28, and a bus 18 connecting different system components (including the system memory 28 and the processing unit 16).

[0114] The range hood also includes a sensor and a reverse sound generator, wherein the sensor is used to obtain air outlet data of the range hood, and the reverse sound generator is used to emit reverse sound to offset the operating noise of the range hood.

[0115] Bus 18 represents one or more of several types of bus structures, including a memory bus or memory controller, a peripheral bus, an accelerated graphics port, a processor or a local bus using any of a variety of bus architectures. By way of example, these architectures include, but are not limited to, an Industry Standard Architecture (ISA) bus, a Micro Channel Architecture (MAC) bus, an Enhanced ISA bus, a Video Electronics Standards Association (VESA) local bus, and a Peripheral Component Interconnect (PCI) bus.

[0116] The range hood 4 typically includes a variety of computer system readable media. These media can be any available media that can be accessed by the range hood 4, including volatile and non-volatile media, removable and non-removable media.

[0117] The system memory 28 may include computer system readable media in the form of volatile memory, such as random access memory (RAM) 30 and / or cache memory 32. The range hood 4 may further include other removable / non-removable, volatile / non-volatile computer system storage media. By way of example only, the storage system 34 may be used to read and write non-removable, non-volatile magnetic media ( Figure 4 not shown, usually called a "hard drive"). Although Figure 4 Not shown in the figure, a disk drive for reading and writing to a removable non-volatile disk (e.g., a "floppy disk"), and an optical disk drive for reading and writing to a removable non-volatile optical disk (e.g., a CD-ROM, a DVD-ROM, or other optical media) may be provided. In these cases, each drive may be connected to the bus 18 via one or more data medium interfaces. The system memory 28 may include at least one program product having a set (e.g., at least one) of program modules that are configured to perform the functions of the various embodiments of the present invention.

[0118] A program / utility 40 having a set (at least one) of program modules 42 may be stored, for example, in system memory 28, such program modules 42 including, but not limited to, an operating system, one or more application programs, other program modules, and program data, each of which or some combination may include an implementation of a network environment. Program modules 42 generally perform the functions and / or methods of the embodiments described herein.

[0119] The range hood 4 may also communicate with one or more external devices 14 (e.g., keyboards, pointing devices, displays 24, etc.), one or more devices that enable a user to interact with the range hood 4, and / or any device that enables the range hood 4 to communicate with one or more other computing devices (e.g., network cards, modems, etc.). Such communication may be performed via an input / output (I / O) interface 22. Furthermore, the range hood 4 may also communicate with one or more networks (e.g., local area networks (LANs), wide area networks (WANs), and / or public networks, such as the Internet) via a network adapter 20. Figure 4 As shown, the network adapter 20 communicates with other modules of the range hood 4 via the bus 18. It should be understood that although Figure 4 Not shown, other hardware and / or software modules may be used in conjunction with the range hood 4, including but not limited to: microcode, device drivers, redundant processing units, external disk drive arrays, RAID systems, tape drives, and data backup storage systems.

[0120] The processing unit 16 executes various functional applications and page displays by running the program stored in the system memory 28, for example, implementing the range hood noise reduction method provided in an embodiment of the present invention, the method comprising:

[0121] When the range hood is running, the air outlet data of the range hood is obtained based on a sensor disposed at the air outlet of the range hood, and a change rate of the air outlet data is determined;

[0122] When it is determined that the change rate is not greater than the change rate threshold and the duration is not less than the time threshold, determining the control parameter in a correspondence table between the wind output data and the control parameter according to the wind output data;

[0123] Based on the control parameter, the reverse sound generator is controlled to emit reverse sound to offset the operating noise of the range hood.

[0124] Of course, those skilled in the art can understand that the processor can also implement the technical solution of the range hood noise reduction method provided by any embodiment of the present invention.

[0125] An embodiment of the present invention provides a computer-readable storage medium on which a computer program is stored. When the program is executed by a processor, for example, a range hood noise reduction method provided by an embodiment of the present invention is implemented. The method includes:

[0126] When the range hood is running, the air outlet data of the range hood is obtained based on a sensor disposed at the air outlet of the range hood, and a change rate of the air outlet data is determined;

[0127] When it is determined that the change rate is not greater than the change rate threshold and the duration is not less than the time threshold, determining the control parameter in a correspondence table between the wind output data and the control parameter according to the wind output data;

[0128] Based on the control parameter, the reverse sound generator is controlled to emit reverse sound to offset the operating noise of the range hood.

[0129] The computer storage medium of the embodiment of the present invention can adopt any combination of one or more computer-readable media. The computer-readable medium can be a computer-readable signal medium or a computer-readable storage medium. The computer-readable storage medium can be, for example, but not limited to: an electrical, magnetic, optical, electromagnetic, infrared, or semiconductor system, device or device, or any combination of the above. More specific examples (non-exhaustive list) of computer-readable storage media include: an electrical connection with one or more wires, a portable computer disk, a hard disk, a random access memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), an optical fiber, a portable compact disk read-only memory (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination of the above. In this document, a computer-readable storage medium can be any tangible medium containing or storing a program, which can be used by an instruction execution system, device or device or used in combination with it.

[0130] Computer-readable signal media may include data signals propagated in baseband or as part of a carrier wave, which carry computer-readable program code. Such propagated data signals may take a variety of forms, including but not limited to electromagnetic signals, optical signals, or any suitable combination of the above. Computer-readable signal media may also be any computer-readable medium other than a computer-readable storage medium, which may send, propagate, or transmit a program for use by or in conjunction with an instruction execution system, apparatus, or device.

[0131] The program code embodied on the computer readable medium may be transmitted using any appropriate medium, including but not limited to wireless, wireline, optical fiber cable, RF, etc., or any suitable combination of the foregoing.

[0132] Computer program code for performing the operations of the present invention may be written in one or more programming languages ​​or a combination thereof, including object-oriented programming languages ​​such as Java, Smalltalk, C++, and conventional procedural programming languages ​​such as "C" or similar programming languages. The program code may be executed entirely on the user's computer, partially on the user's computer, as a separate software package, partially on the user's computer and partially on a remote computer, or entirely on a remote computer or server. In the case of a remote computer, the remote computer may be connected to the user's computer through any type of network, including a local area network (LAN) or a wide area network (WAN), or may be connected to an external computer (e.g., via the Internet using an Internet service provider).

[0133] It should be understood by those skilled in the art that the modules or steps of the present invention described above can be implemented by a general-purpose computing device, they can be concentrated on a single computing device, or distributed on a network composed of multiple computing devices, optionally, they can be implemented by a program code executable by a computer device, so that they can be stored in a storage device and executed by the computing device, or they can be made into individual integrated circuit modules, or multiple modules or steps therein can be made into a single integrated circuit module for implementation. Thus, the present invention is not limited to any specific combination of hardware and software.

[0134] In addition, the acquisition, storage, use, and processing of data in the technical solution of the present invention are in compliance with the relevant provisions of national laws and regulations.

[0135] Note that the above are only preferred embodiments of the present invention and the technical principles used. Those skilled in the art will understand that the present invention is not limited to the specific embodiments herein, and that various obvious changes, readjustments and substitutions can be made by those skilled in the art without departing from the scope of protection of the present invention. Therefore, although the present invention has been described in more detail through the above embodiments, the present invention is not limited to the above embodiments, and may include more other equivalent embodiments without departing from the concept of the present invention, and the scope of the present invention is determined by the scope of the appended claims.

Claims

1. A range hood noise reduction method, characterized in that: include: When the range hood is running, the air outlet data of the range hood is obtained based on a sensor disposed at the air outlet of the range hood, and a change rate of the air outlet data is determined; When it is determined that the change rate is not greater than the change rate threshold and the duration is not less than the time threshold, determining the control parameter in a correspondence table between the wind output data and the control parameter according to the wind output data; Based on the control parameter, the reverse sound generator is controlled to emit reverse sound to offset the operating noise of the range hood.

2. The range hood noise reduction method according to claim 1, characterized in that: The sensor is a pressure sensor or a wind force sensor, and the wind output data is wind output pressure or wind output force.

3. The range hood noise reduction method according to claim 1, characterized in that: When the range hood is running, it also includes: Obtain the current working condition and the operating gear of the range hood.

4. The range hood noise reduction method according to claim 3, characterized in that: Before determining the control parameters in the correspondence table between the wind output data and the control parameters according to the wind output data, the method further includes: A correspondence table of the air outlet data-control parameters corresponding to the current operating condition and the operating gear is determined according to the current operating condition and the operating gear.

5. The range hood noise reduction method according to claim 4, characterized in that: Before determining the corresponding relationship table of the air outlet data-control parameters corresponding to the current working condition and the running gear according to the current working condition and the running gear, the method further includes: When the range hood is operated at each of the operating gears under each of the operating conditions, the air outlet data is obtained based on the sensor, and the reverse sound generator is controlled to emit reverse sound to offset the operating noise of the range hood; Acquiring sound information while adjusting the operating parameters of the reverse sound generator, and determining the operating parameters of the reverse sound generator as the control parameters of the reverse sound generator when the sound information meets the preset sound conditions; A correspondence table between the air outlet data and the control parameters corresponding to each operating gear under each operating condition is constructed based on the air outlet data and the control parameters corresponding to each operating gear under each operating condition.

6. The range hood noise reduction method according to claim 4, characterized in that: When the reverse sound generator is controlled to emit sound based on the control parameter to offset the operating noise of the range hood, it also includes: When it is monitored that the current operating condition and / or the operating gear changes, the process returns to execute the corresponding relationship table of the air outlet data-control parameters corresponding to the current operating condition and the operating gear according to the current operating condition and the operating gear.

7. The range hood noise reduction method according to claim 5, characterized in that: The spectrum of the reverse sound emitted by the reverse sound generator has the same shape as the spectrum of the operating noise of the range hood and has an opposite phase. The sound information includes sound pressure, and the preset sound condition is that the sound pressure is less than a sound pressure threshold.

8. A range hood noise reduction device, characterized in that: include: an acquisition module, configured to acquire the air outlet data of the range hood based on a sensor disposed at the air outlet of the range hood when the range hood is in operation, and determine a change rate of the air outlet data; a determination module, configured to determine the control parameter in a correspondence table between wind output data and control parameters according to the wind output data when it is determined that the change rate is not greater than the change rate threshold and the duration is not less than the time threshold; The execution module is used to control the reverse sound generator to emit reverse sound based on the control parameters to offset the operating noise of the range hood.

9. A range hood, characterized in that: The range hood comprises: one or more processors; A storage device for storing one or more programs; A sensor used to obtain air outlet data of the range hood; A reverse sound generator, used for producing a reverse sound; When the one or more programs are executed by the one or more processors, the one or more processors implement the range hood noise reduction method as described in any one of claims 1-7.

10. A storage medium containing computer executable instructions, characterized in that: The computer executable instructions are used to execute the range hood noise reduction method as described in any one of claims 1 to 7 when executed by a computer processor.

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