Range hood control method and device, range hood and storage medium

Abstract

The invention discloses an extractor hood control method and device, an extractor hood and a storage medium. The range hood comprises a reference microphone and a secondary loudspeaker, the reference microphone is installed in a main machine box of the range hood, the secondary loudspeaker is arranged in a smoke collecting cavity of the range hood, and the control method of the range hood comprises the steps that the reference microphone is controlled to collect real-time range hood sound pressure of the range hood; obtaining real-time audio sound pressure when the secondary loudspeaker plays the regulation and control audio based on the real-time range hood sound pressure conversion; according to the real-time audio sound pressure, determining a reference sound pressure at which the real-time audio sound pressure reaches a reference microphone, and according to the reference sound pressure and the real-time range hood sound pressure, determining a body noise sound pressure level of the range hood; and according to the body noise sound pressure level, determining the current playing volume opening degree of the secondary loudspeaker when the extractor hood runs at the current gear. According to the invention, shielding of environmental noise is realized in an audio injection mode.

Description

Technical Field

[0001] The present invention relates to the technical field of range hoods, and in particular, to a control method and device for a range hood, a range hood, and a storage medium. Background Art

[0002] A range hood is a kitchen appliance for purifying the kitchen environment. It is installed above the kitchen stove and can quickly extract the waste generated by the stove combustion and the harmful fumes generated during the cooking process outdoors. At the same time, it condenses and collects the fumes, reduces pollution, purifies the air, and has the safety guarantee functions of preventing poisoning and explosion.

[0003] Traditional range hoods often generate relatively large noise during operation, which not only affects the user's cooking experience but also may have potential impacts on health. Existing range hood noise reduction technologies mostly focus on improving the design of the fan air duct and increasing sound absorption and insulation materials. These methods can reduce noise to a certain extent, but often result in an increase in the volume of the device or an increase in the manufacturing cost. Summary of the Invention

[0004] The present invention provides a control method and device for a range hood, a range hood, and a storage medium to solve the problem that the current range hood noise reduction relies on equipment improvement or has a relatively high manufacturing cost.

[0005] According to an aspect of the present invention, there is provided a control method for a range hood. The range hood includes a reference microphone and a secondary speaker. The reference microphone is installed inside the main cabinet of the range hood, and the secondary speaker is arranged inside the smoke collecting cavity of the range hood. The control method for the range hood includes:

[0006] Controlling the reference microphone to collect the real-time sound pressure of the range hood, and obtaining the real-time audio sound pressure when the secondary speaker plays the regulation audio converted based on the real-time sound pressure of the range hood;

[0007] Determining the reference sound pressure at which the real-time audio sound pressure reaches the reference microphone according to the real-time audio sound pressure, and determining the body noise sound pressure level of the range hood according to the reference sound pressure and the real-time sound pressure of the range hood;

[0008] Determining the current playback volume opening of the secondary speaker when the range hood operates at the current gear according to the body noise sound pressure level.

[0009] Optionally, before determining the reference sound pressure at which the real-time audio sound pressure reaches the reference microphone according to the real-time audio sound pressure, it further includes:

[0010] Obtaining the sound transfer function between the secondary speaker and the reference microphone;

[0011] Determining the reference sound pressure at which the real-time audio sound pressure reaches the reference microphone according to the real-time audio sound pressure, including:

[0012] Determine the reference sound pressure of the real-time audio sound pressure reaching the reference microphone according to the real-time audio sound pressure and the sound transfer function.

[0013] Optionally, the range hood control method further includes:

[0014] Based on the playing audio volume of the range hood and the sound pressure level of the corresponding generated noise data under the range hood working noise test experiment, generate the sound pressure - volume curve of the range hood, and obtain the pre - calibrated upper threshold sound pressure level of the range hood noise.

[0015] Optionally, determining the current playing volume opening of the secondary speaker when the range hood operates in the current gear according to the body noise sound pressure level includes:

[0016] Determine the corresponding curve slope according to the body noise sound pressure level and the sound pressure - volume curve;

[0017] Determine the current playing volume opening of the secondary speaker when the range hood operates in the current gear according to the body noise sound pressure level, the curve slope, and the upper threshold sound pressure level of the range hood noise.

[0018] Optionally, before determining the current playing volume opening of the secondary speaker when the range hood operates in the current gear according to the body noise sound pressure level, the curve slope, and the upper threshold sound pressure level of the range hood noise, it further includes:

[0019] Obtain the initial playing volume opening of the secondary speaker;

[0020] Determine the current playing volume opening of the secondary speaker when the range hood operates in the current gear according to the body noise sound pressure level, the curve slope, and the upper threshold sound pressure level of the range hood noise, including:

[0021] Determine the current playing volume opening of the secondary speaker when the range hood operates in the current gear based on the following formula, specifically:

[0022]

[0023] where, V (x) is the current playing volume opening; V0 is the initial playing volume opening; SPL(n) is the body noise sound pressure level; SPL max is the upper threshold sound pressure level of the range hood noise; k is the curve slope.

[0024] Optionally, the range hood control method further includes:

[0025] Obtain the kitchen data at the location where the range hood is located, and store the kitchen data and the body noise sound pressure level of the range hood operating at the current gear corresponding to each other in the range hood, so that when the range hood is used next time, it can directly call the body noise sound pressure level and then determine the current playback volume opening degree of the corresponding secondary speaker for operation and playback.

[0026] Optionally, determining the body noise sound pressure level of the range hood includes:

[0027] Obtain the kitchen data at the location where the range hood is located, and call the body noise sound pressure level of the corresponding range hood operating at the current gear stored in the range hood according to the kitchen data.

[0028] According to another aspect of the present invention, there is provided a range hood control device. The range hood includes a reference microphone and a secondary speaker. The reference microphone is installed inside the main cabinet of the range hood, and the secondary speaker is arranged inside the smoke collecting cavity of the range hood. The range hood control device includes:

[0029] A real-time sound pressure acquisition module, configured to control the reference microphone to collect the real-time range hood sound pressure of the range hood, and obtain the real-time audio sound pressure when the secondary speaker plays the regulation audio converted based on the real-time range hood sound pressure;

[0030] A body noise sound pressure level determination module, configured to determine the reference sound pressure at which the real-time audio sound pressure reaches the reference microphone according to the real-time audio sound pressure, and determine the body noise sound pressure level of the range hood according to the reference sound pressure and the real-time range hood sound pressure;

[0031] A volume opening degree determination module, configured to determine the current playback volume opening degree of the secondary speaker of the range hood operating at the current gear according to the body noise sound pressure level.

[0032] According to another aspect of the present invention, there is provided a range hood. The range hood includes a reference microphone and a secondary speaker. The reference microphone is installed inside the main cabinet of the range hood, and the secondary speaker is arranged inside the smoke collecting cavity of the range hood;

[0033] The range hood further includes:

[0034] At least one processor; and,

[0035] A memory communicatively connected to the at least one processor; wherein,

[0036] The memory stores a computer program executable by the at least one processor. The computer program is executed by the at least one processor so that the at least one processor can execute the range hood control method of any embodiment of the present invention.

[0037] According to another aspect of the present invention, there is provided a computer-readable storage medium storing computer instructions for causing a processor to implement the range hood control method according to any embodiment of the present invention when executed.

[0038] In the technical solution of the embodiment of the present invention, a reference microphone is controlled to collect the real-time sound pressure of the range hood, and the real-time audio sound pressure when the secondary speaker plays the regulation audio converted based on the real-time sound pressure of the range hood is obtained, so as to obtain the sound pressure causing the noise problem of the range hood in real time, and then match the optimal regulation sound, enhance the versatility and adaptability of audio injection, and reduce the annoyance degree of the range hood noise. Further, the reference sound pressure when the real-time audio sound pressure reaches the reference microphone is determined according to the real-time audio sound pressure, the body noise sound pressure level of the range hood is determined according to the reference sound pressure and the real-time sound pressure of the range hood, and the current playback volume opening degree of the secondary speaker when the range hood operates at the current gear is determined according to the body noise sound pressure level, thus solving the problem that the current noise reduction of the range hood relies on equipment improvement or high manufacturing cost, realizing the shielding of environmental noise by means of audio injection, improving the comfort of users, and reducing the impact of noise on the psychology of users.

[0039] It should be understood that the content described in this part is not intended to identify the key or important features of the embodiments of the present invention, nor is it used to limit the scope of the present invention. Other features of the present invention will become easily understood through the following description. BRIEF DESCRIPTION OF THE DRAWINGS

[0040] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following will briefly introduce the drawings required for the description of the embodiments. Obviously, the following drawings are only some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0041] Figure 1 is a schematic structural diagram of a range hood applicable to the embodiment of the present invention;

[0042] Figure 2 is a flowchart of a range hood control method provided by the embodiment of the present invention;

[0043] Figure 3 is a schematic diagram of an experimental scenario of a range hood working noise test experiment provided by the embodiment of the present invention;

[0044] Figure 4 is a schematic diagram of the sound pressure volume curve of the range hood provided by the embodiment of the present invention;

[0045] Figure 5It is a flowchart of a range hood control method provided according to an embodiment of the present invention;

[0046] Figure 6 It is a flowchart of a range hood control method provided according to an embodiment of the present invention;

[0047] Figure 7 It is a schematic structural diagram of a range hood control device provided according to an embodiment of the present invention;

[0048] Figure 8 It is a schematic structural diagram of a range hood that implements the range hood control method of the embodiment of the present invention;

[0049] In the figure:

[0050] 10. Main chassis; 20. Smoke collecting cavity; 30. Reference microphone; 40. Secondary speaker; 50. Plane wave cavity; 60. High-precision microphone; 70. Audio device;

[0051] 410. Real-time sound pressure acquisition module; 420. Body noise sound pressure level determination module; 430. Volume opening determination module;

[0052] 510. Range hood control system; 511. Processor; 512. Read-only memory (ROM); 513. Random access memory (RAM); 514. Bus; 515. Input / output (I / O) interface; 516. Input unit; 517. Output unit; 518. Storage unit; 519. Communication unit. Detailed implementation manners

[0053] In order to enable those skilled in the art of the present technology to better understand the solution of the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0054] It should be noted that the terms "first", "second", etc. in the description, claims and above-mentioned drawings of the present invention are used to distinguish similar objects, and do not necessarily describe a specific order or sequence. It should be understood that the data used in this way can be interchanged under appropriate circumstances, so that the embodiments of the present invention described here can be implemented in an order other than those illustrated or described here. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusion. For example, a process, method, system, product or device that includes a series of steps or units does not necessarily have to be limited to those steps or units clearly listed, but may include other steps or units not clearly listed or inherent to these processes, methods, products or devices.

[0055] Figure 2 The embodiment of the present invention provides a flowchart of a range hood control method. This embodiment is applicable to the situation where the range hood shields environmental noise by means of audio injection. The range hood control method can be executed by a range hood control device, which can be implemented in the form of hardware and / or software, and the range hood control device can be configured in various models of range hoods. As Figure 1 shown, the range hood includes a reference microphone 30 and a secondary speaker 40. The reference microphone 30 is installed inside the main cabinet 10 of the range hood, and the secondary speaker 40 is arranged inside the smoke collecting cavity 20 of the range hood. As Figure 2 shown, the range hood control method includes:

[0056] S110: Control the reference microphone to collect the real-time sound pressure of the range hood, and obtain the real-time audio sound pressure when the secondary speaker plays the regulation audio converted based on the real-time sound pressure of the range hood.

[0057] Among them, since the outlet of the range hood is the main distribution position of the noise, reference can be continued to Figure 1 shown, the secondary speaker 40 is arranged inside the smoke collecting cavity 20 of the range hood. Further, in order to cover the sound field as much as possible, a plurality of secondary speakers 40 can be set, that is, the number of secondary speakers 40 can be but not limited to be greater than or equal to 2. This embodiment does not impose any restrictions on the number of secondary speakers 40.

[0058] To achieve a better active noise reduction effect, reference can be continued to Figure 1 shown, the reference microphone 30 needs to be installed inside the main cabinet 10 of the range hood and form a cavity with the main cabinet 10 that can meet the generation of a plane wave sound field. Among them, the cavity depth is D, and generally D is greater than 30 mm.

[0059] It can be understood that in order to accurately capture the sound field, the number of reference microphones 30 should be as large as possible. Refer toFigure 1 The reference microphone 30 shown only gives the arrangement when there are two reference microphones 30, but more reference microphones can be added in the same plane to achieve better results. This embodiment does not impose any restrictions on the number of reference microphones 30.

[0060] It can be known that the real-time sound pressure of the range hood is the sound pressure corresponding to the noise signal of the range hood collected by the reference microphone in real time. The reference microphone collects the real-time noise signal of the range hood in real time, and the integrated processor inside the range hood processes the real-time noise signal to generate a control audio converted based on the real-time sound pressure of the range hood, thereby generating a secondary sound wave used to cancel the noise, and controlling the secondary speaker to play the control audio converted based on the real-time sound pressure of the range hood.

[0061] The real-time audio sound pressure is the sound pressure of the control audio played by the secondary speaker in real time. The control audio played by the secondary speaker in real time can be used as the secondary sound wave for cancellation. The control audio played by the secondary speaker in real time can be obtained by the reference microphone collecting the real-time noise signal of the range hood and the integrated processor inside the range hood processing the real-time noise signal. The control audio played by the secondary speaker in real time can also be the audio corresponding to the current gear operation pre-stored in the range hood. This embodiment does not impose any restrictions on this.

[0062] It should be noted that Figure 1 the secondary speaker, the reference microphone, and the integrated processor inside the range hood are all connected through data lines, which are not shown in the figure.

[0063] S120. Determine the reference sound pressure when the real-time audio sound pressure reaches the reference microphone according to the real-time audio sound pressure, and determine the body noise sound pressure level of the range hood according to the reference sound pressure and the real-time sound pressure of the range hood.

[0064] Among them, the reference sound pressure is the sound pressure obtained after the real-time audio sound pressure recorded by the reference microphone arrives. Since the real-time audio sound pressure is generated by the secondary speaker, the reference sound pressure is related to the secondary speaker and the reference microphone.

[0065] In this embodiment, before determining the reference sound pressure when the real-time audio sound pressure reaches the reference microphone according to the real-time audio sound pressure, obtain the sound transfer function between the secondary speaker and the reference microphone, that is, the sound transfer function can be obtained by those skilled in the art testing the sound transfer function between the secondary speaker and the reference microphone in the laboratory, and the sound transfer function is denoted as F(v).

[0066] On the above basis, determine the reference sound pressure when the real-time audio sound pressure reaches the reference microphone according to the real-time audio sound pressure and the sound transfer function. Specifically: p v (t) = p a (t) × F(v), where p v(t) is the reference sound pressure; p a (t) is the real-time audio sound pressure; F(v) is the sound transfer function.

[0067] Furthermore, the body noise sound pressure level of the range hood is the total sound pressure recorded in real time by the reference microphone inside the range hood, that is, the sound pressure after the superposition of the reference sound pressure and the real-time range hood sound pressure.

[0068] S130. Determine the current playback volume opening of the secondary speaker when the range hood operates in the current gear according to the body noise sound pressure level.

[0069] On the above basis, before controlling the range hood, refer to Figure 3 the working noise test experimental scenario of the range hood shown, and then generate a sound pressure volume curve of the range hood based on the playback audio volume of the range hood and the sound pressure level of the corresponding generated noise data under the working noise test of the range hood, and obtain the pre-calibrated upper threshold range hood noise sound pressure level for subsequent volume regulation.

[0070] Furthermore, refer to Figure 4 the sound pressure volume curve of the range hood shown to determine the curve slope corresponding to the body noise sound pressure level. Furthermore, determine the current playback volume opening of the secondary speaker when the range hood operates in the current gear according to the body noise sound pressure level, the curve slope, and the upper threshold range hood noise sound pressure level.

[0071] Among them, the volume opening is the intensity of the sound emitted by the range hood. In this embodiment, after calculating the current playback volume opening, the range hood needs to be adjusted from the initial playback volume opening to the current playback volume opening. First, obtain the initial playback volume opening of the range hood. The initial playback volume opening can be the maximum sound size that the range hood can generate when driving the speaker, which is related to the factory attributes of the range hood. This embodiment does not impose any restrictions on it.

[0072] On the above basis, determine the current playback volume opening of the secondary speaker when the range hood operates in the current gear based on the following formula, specifically:

[0073]

[0074] Among them, V (x) is the current playback volume opening; V0 is the initial playback volume opening; SPL(n) is the body noise sound pressure level; SPL max is the upper threshold range hood noise sound pressure level; k is the curve slope.

[0075] Exemplarily, taking the initial playback volume opening of 100 dB(A) as an example, the upper threshold range hood noise sound pressure level is 70 dB. If the body noise sound pressure level SPL(n) is the sound pressure level in the strong gear, correspondingly, the curve slope of the body noise sound pressure level is obtained by checking the sound pressure - volume curve, and the curve slope k is 0.5 dB / unit volume. Then, when setting the audio injection function for the range hood to operate in the strong gear, the range hood is adjusted from the initial playback volume opening of 100 to the current playback volume opening of 88.

[0076] In the technical solution of the embodiment of the present invention, the range hood includes a reference microphone and a secondary speaker. The reference microphone is installed inside the main cabinet of the range hood, and the secondary speaker is arranged inside the smoke collecting cavity of the range hood. The range hood control method includes: controlling the reference microphone to collect the real - time range hood sound pressure, and obtaining the real - time audio sound pressure when the secondary speaker plays the regulation audio converted based on the real - time range hood sound pressure; determining the reference sound pressure when the real - time audio sound pressure reaches the reference microphone according to the real - time audio sound pressure, and determining the body noise sound pressure level of the range hood according to the reference sound pressure and the real - time range hood sound pressure; determining the current playback volume opening of the secondary speaker when the range hood operates in the current gear according to the body noise sound pressure level. The embodiment of the present invention realizes the shielding of environmental noise by means of audio injection, improves the comfort of users, and reduces the impact of noise on the psychology of users.

[0077] Based on the same inventive concept, Figure 5 It is a flowchart of a range hood control method provided by an embodiment of the present invention. On the basis of the above - mentioned embodiment, a sound pressure - volume curve of the range hood is generated under the range hood working noise test experiment, and then, based on the sound pressure - volume curve and the body noise sound pressure level, the current playback volume opening of the secondary speaker when the range hood operates in the current gear is determined, providing an optional implementation manner. As Figure 5 shown, the range hood control method includes:

[0078] S210. Based on the playback audio volume of the range hood and the sound pressure level of the corresponding generated noise data under the range hood working noise test experiment, generate a sound pressure - volume curve of the range hood, and obtain the pre - calibrated upper threshold range hood noise sound pressure level.

[0079] Specifically, under the range hood working noise test experiment, the playback audio volume of the range hood and the sound pressure level of the corresponding generated noise data are collected at a set volume step length, and a sound pressure - volume curve of the range hood is generated according to the playback audio volume and the noise data sound pressure level corresponding to each set volume step length.

[0080] Build according to the working noise test of the national standard as Figure 3In the working noise test experimental scenario of the range hood shown, the range hood is installed in a simulated kitchen. A high-precision microphone 60 is separately set at the position of the human ear. The high-precision microphone 60 is set to be 150 cm high and 150 cm away from the wall where the range hood is installed according to the national standard requirements. Based on this, considering that the white noise audio has signals in the full frequency band and is suitable for making frequency response curves, the white noise audio is played through the audio device 70 at 100% volume opening, and the high-precision microphone 60 records the noise data at this time. The audio device 70 plays the white noise audio and the high-precision microphone 60 records the noise data repeatedly with a set volume step. All the recorded data is converted into the playback audio volume of the audio device 70 and the sound pressure level of the corresponding noise data recorded by the high-precision microphone 60, and then the sound pressure volume curve of the range hood can be integrated and generated.

[0081] Among them, the set volume step is related to the effective minimum volume threshold of the range hood, and can be specifically selected and set according to the effective minimum volume threshold and the expected measurement accuracy. This embodiment does not impose any restrictions on the set volume step. The value of the effective minimum volume threshold depends on the background noise of the working noise test experimental scenario of the range hood. Exemplarily, at a certain volume opening, the difference between the sound pressure level of the sound emitted by the range hood at the high-precision microphone and the background noise is equal to 6 decibels, then the set volume step is 6 decibels.

[0082] In this embodiment, when collecting the playback audio volume of the range hood and the sound pressure level of the corresponding generated noise data at the set volume step in the working noise test of the range hood, it can be completed by decreasing the set volume step from the initial playback volume opening of the range hood to the effective minimum volume threshold and statistically analyzing the data at each volume opening, or it can be completed by increasing the set volume step from the effective minimum volume threshold to the initial playback volume opening and statistically analyzing the data at each volume opening. This embodiment does not impose any restrictions on this.

[0083] Furthermore, the pre-calibrated upper threshold range hood noise sound pressure level should be understood as that the noise sound pressure level of the range hood at its highest speed gear should not exceed a certain specific decibel value. The upper threshold range hood noise sound pressure level can be selected as 70 dB according to the national standard requirements (corresponding to the superimposed sound pressure level not exceeding 73).

[0084] It is known that due to hardware differences, the change in the output sound pressure level corresponding to the volume change of the range hood is often different. Especially in a reverberation field environment, there is still a transmission loss from the range hood to the user's ear. In some application cases, those skilled in the art will perform sound pressure matching for each gear of a certain range hood, usually using the sound field restoration method and the sound simulation method to construct the transfer function from the range hood to the human ear, so as to directly calibrate the volume of the audio in the software, but this method is undoubtedly time-consuming and laborious and has low efficiency. In this embodiment, according to the working noise test of the national standard, it is built as Figure 3The working noise test experimental scenario of the range hood shown is applicable to all range hoods. By analyzing the sound pressure volume curve of the range hood in the reverberation field of the working noise test experimental scenario of the range hood, an audio injection method that only calibrates the audio once is realized.

[0085] S220. Control the reference microphone to collect the real-time range hood sound pressure of the range hood, and obtain the real-time audio sound pressure when the secondary speaker plays the regulated audio converted based on the real-time range hood sound pressure.

[0086] S230. Determine the reference sound pressure at which the real-time audio sound pressure reaches the reference microphone according to the real-time audio sound pressure, and determine the body noise sound pressure level of the range hood according to the reference sound pressure and the real-time range hood sound pressure.

[0087] Specifically, obtain the real-time audio sound pressure played in real time by the secondary speaker corresponding to the range hood stored in the range hood when operating at the current gear, and based on the real-time range hood sound pressure recorded in real time by the reference microphone through the audio played in real time by the secondary speaker. Further, determine the reference sound pressure at which the real-time audio sound pressure reaches the reference microphone according to the sound transfer function between the real-time audio sound pressure and the secondary speaker and the reference microphone, and determine the body noise sound pressure level of the range hood according to the reference sound pressure and the real-time range hood sound pressure, so as to realize the convenient and accurate acquisition of the body noise sound pressure level of the range hood when operating at the current gear.

[0088] S240. Determine the corresponding curve slope according to the body noise sound pressure level and the sound pressure volume curve.

[0089] S250. Determine the current playback volume opening of the secondary speaker of the range hood when operating at the current gear according to the body noise sound pressure level, the curve slope, and the upper threshold range hood noise sound pressure level.

[0090] The technical solution of the embodiment of the present invention is based on the playback audio volume of the range hood and the corresponding generated noise data sound pressure level under the working noise test of the range hood, generates the sound pressure volume curve of the range hood, realizes the audio injection that only calibrates the audio once, saves manpower and time, improves the regulation efficiency of the playback volume of the range hood, ensures the audio use effect of the range hood, and enhances the comfort of the users of the range hood; at the same time, determines the reference sound pressure at which the real-time audio sound pressure reaches the reference microphone according to the real-time audio sound pressure, and determines the body noise sound pressure level of the range hood according to the reference sound pressure and the real-time range hood sound pressure, and then determines the current playback volume opening of the secondary speaker of the range hood when operating at the current gear, realizes the audio injection that only calibrates the audio once, achieves the audio use effect of the range hood, and at the same time, after obtaining the body noise sound pressure level of the range hood in real time, adaptively realizes the matching of the current playback volume opening of the range hood, enhances the versatility and adaptability of the audio injection, and reduces the annoyance degree of the range hood noise.

[0091] Based on the same inventive concept, Figure 6 is a flowchart of a control method for a range hood provided in an embodiment of the present invention. On the basis of the above embodiment, considering the differences in kitchen data in the user's home, a more optimal range hood is recommended through kitchen data, and the current operating noise data of the range hood at the current operating gear is used to determine the current playback volume opening of the secondary speaker when the range hood is operating at the current gear, providing an optional implementation manner. As Figure 6 shown, the range hood control method includes:

[0092] S310. Generate a sound pressure volume curve of the range hood based on the playback audio volume of the range hood and the sound pressure level of the corresponding generated noise data in the range hood working noise test experiment, and obtain the pre-calibrated upper threshold range hood noise sound pressure level.

[0093] In this embodiment, the body noise sound pressure level of the range hood at each current gear operation is synchronously saved with the corresponding kitchen data, that is, after completing an audio injection regulation of the range hood, the kitchen data at the location of the range hood is obtained, and the kitchen data and the body noise sound pressure level of the range hood at the current gear operation are correspondingly stored in the range hood for the range hood to directly call the body noise sound pressure level when used next time and then determine the current playback volume opening of the corresponding secondary speaker for operation and playback.

[0094] S320. Obtain the kitchen data at the location of the range hood, and call the body noise sound pressure level of the corresponding range hood at the current gear operation stored in the range hood according to the kitchen data.

[0095] On the above basis, the body noise sound pressure level of the range hood at the current gear operation can be obtained in combination with the kitchen data, that is, after obtaining the kitchen data at the location of the range hood, the body noise sound pressure level of the corresponding range hood at the current gear operation stored in the range hood is called based on the kitchen data.

[0096] Among them, the kitchen data can be, but is not limited to, data such as the floor where the range hood is located, the length, width and height of the range hood, or whether there is a matching cabinet installed, etc. This embodiment does not impose any restrictions on the kitchen data.

[0097] It can be understood that the playback volume opening of the range hood at different gears and the kitchen data at the location are correspondingly stored in the range hood, and after each operation of the range hood is completed, the data is saved to the range hood to continuously supplement and optimize the data in the range hood for subsequent matching of the current playback volume opening of the secondary speaker.

[0098] S330. Determine the corresponding curve slope according to the body noise sound pressure level and the sound pressure volume curve.

[0099] S340. Determine the current playback volume opening of the secondary speaker when the range hood is operating in the current gear according to the body noise sound pressure level, the curve slope, and the upper threshold range hood noise sound pressure level.

[0100] In the technical solution of the embodiment of the present invention, after generating the sound pressure volume curve of the range hood based on the playback audio volume of the range hood and the sound pressure level of the corresponding generated noise data under the range hood working noise test experiment, obtain the kitchen data at the location of the range hood, and call the body noise sound pressure level of the corresponding range hood operating in the current gear stored in the range hood according to the kitchen data. Further, determine the corresponding curve slope according to the body noise sound pressure level and the sound pressure volume curve, and determine the current playback volume opening of the secondary speaker when the range hood is operating in the current gear according to the body noise sound pressure level, the curve slope, and the upper threshold range hood noise sound pressure level. Through a calibration of the pre-regulated audio, and then using the volume sound pressure curve to adjust the playback volume opening, it can be applied to all gears of all range hoods, enhance the audio injection adaptability, and reduce the annoyance degree of users when using the range hood.

[0101] Figure 7 It is a schematic structural diagram of a range hood control device provided by an embodiment of the present invention. The range hood includes a reference microphone and a secondary speaker. The reference microphone is installed inside the main cabinet of the range hood, and the secondary speaker is arranged inside the smoke collecting cavity of the range hood. As Figure 7 shown, the range hood control device includes:

[0102] A real-time sound pressure acquisition module 410, configured to control the reference microphone to collect the real-time range hood sound pressure of the range hood, and obtain the real-time audio sound pressure when the secondary speaker plays the regulated audio converted based on the real-time range hood sound pressure;

[0103] A body noise sound pressure level determination module 420, configured to determine the reference sound pressure at which the real-time audio sound pressure reaches the reference microphone according to the real-time audio sound pressure, and determine the body noise sound pressure level of the range hood according to the reference sound pressure and the real-time range hood sound pressure;

[0104] A volume opening determination module 430, configured to determine the current playback volume opening of the secondary speaker when the range hood is operating in the current gear according to the body noise sound pressure level.

[0105] Optionally, the range hood control device further includes:

[0106] A sound transfer function determination module, configured to obtain the sound transfer function between the secondary speaker and the reference microphone;

[0107] Determine the reference sound pressure of the real-time audio sound pressure at the reference microphone, specifically for:

[0108] Determine the reference sound pressure of the real-time audio sound pressure at the reference microphone according to the real-time audio sound pressure and the sound transfer function.

[0109] Optionally, the range hood control device further includes:

[0110] A sound pressure-volume curve determination module, configured to generate a sound pressure-volume curve of the range hood based on the playing audio volume of the range hood and the corresponding sound pressure level of the generated noise data under the range hood working noise test experiment, and obtain the pre-calibrated upper threshold range hood noise sound pressure level.

[0111] Optionally, determine the current playing volume opening of the secondary speaker when the range hood is operating in the current gear according to the body noise sound pressure level, specifically for:

[0112] Determine the corresponding curve slope according to the body noise sound pressure level and the sound pressure-volume curve;

[0113] Determine the current playing volume opening of the secondary speaker when the range hood is operating in the current gear according to the body noise sound pressure level, the curve slope, and the upper threshold range hood noise sound pressure level.

[0114] Optionally, the range hood control device further includes:

[0115] An initial playing volume opening acquisition module, configured to obtain the initial playing volume opening of the secondary speaker;

[0116] Determine the current playing volume opening of the secondary speaker when the range hood is operating in the current gear according to the body noise sound pressure level, the curve slope, and the upper threshold range hood noise sound pressure level, specifically for:

[0117] Determine the current playing volume opening of the secondary speaker when the range hood is operating in the current gear based on the following formula, specifically:

[0118]

[0119] Wherein, V (x) is the current playing volume opening; V0 is the initial playing volume opening; SPL(n) is the body noise sound pressure level; SPL max is the upper threshold range hood noise sound pressure level; k is the curve slope.

[0120] Optionally, the range hood control device further includes:

[0121] A data storage module, configured to obtain kitchen data at the location where the range hood is located, and store the kitchen data and the body noise sound pressure level of the range hood operating at the current gear correspondingly in the range hood, so that when the range hood is used next time, the body noise sound pressure level can be directly called to determine the current playback volume opening of the corresponding secondary speaker for operation and playback.

[0122] Optionally, determining the body noise sound pressure level of the range hood is specifically used for:

[0123] Obtain kitchen data at the location where the range hood is located, and call the body noise sound pressure level of the corresponding range hood operating at the current gear stored in the range hood according to the kitchen data.

[0124] The range hood control device provided by the embodiments of the present invention can execute the range hood control method provided by any embodiment of the present invention, and has function modules and beneficial effects corresponding to executing the range hood control method.

[0125] Figure 8 FIG. shows a schematic structural diagram of a range hood 510 that can be used to implement the embodiments of the present invention. The range hood includes a reference microphone and a secondary speaker. The reference microphone is installed inside the main cabinet of the range hood, and the secondary speaker is arranged inside the smoke collecting cavity of the range hood; as Figure 8 shown, the range hood 510 further includes at least one processor 511, and a memory communicatively connected to the at least one processor 511, such as a read-only memory (ROM 512), a random access memory (RAM 513), etc. Among them, the memory stores a computer program executable by the at least one processor. The processor 511 can execute various appropriate actions and processes according to the computer program stored in the read-only memory (ROM 512) or the computer program loaded from the storage unit 518 into the random access memory (RAM 513). In the RAM 513, various programs and data required for the operation of the range hood 510 can also be stored. The processor 511, the ROM 512, and the RAM 513 are connected to each other through a bus 514. The I / O (input / output) interface 515 is also connected to the bus 514.

[0126] Multiple components in the range hood 510 are connected to the I / O interface 515, including: an input unit 516, such as a keyboard, a mouse, etc.; an output unit 517, such as various types of displays, speakers, etc.; a storage unit 518, such as a magnetic disk, an optical disc, etc.; and a communication unit 519, such as a network card, a modem, a wireless communication transceiver, etc. The communication unit 519 allows the range hood 510 to exchange information / data with other devices through a computer network such as the Internet and / or various telecommunication networks.

[0127] The processor 511 can be various general-purpose and / or special-purpose processing components with processing and computing capabilities. Some examples of the processor 511 include, but are not limited to, a central processing unit (CPU), a graphics processing unit (GPU), various dedicated artificial intelligence (AI) computing chips, various processors running machine learning model algorithms, a digital signal processor (DSP), and any suitable processor, controller, microcontroller, etc. The processor 511 executes the various methods and processes described above, such as the range hood control method.

[0128] In some embodiments, the range hood control method can be implemented as a computer program tangibly embodied in a computer-readable storage medium, such as the storage unit 518. In some embodiments, part or all of the computer program can be loaded and / or installed onto the range hood 510 via the ROM 512 and / or the communication unit 519. When the computer program is loaded into the RAM 513 and executed by the processor 511, one or more steps of the range hood control method described above can be executed. Alternatively, in other embodiments, the processor 511 can be configured to execute the range hood control method by any other suitable means (e.g., by means of firmware).

[0129] The various embodiments of the systems and techniques described above herein can be implemented in digital electronic circuitry, integrated circuit systems, field-programmable gate arrays (FPGA), application-specific integrated circuits (ASIC), application-specific standard products (ASSP), systems-on-a-chip (SOC), complex programmable logic devices (CPLD), computer hardware, firmware, software, and / or combinations thereof. These various embodiments can include: implemented in one or more computer programs that can be executed and / or interpreted on a programmable system including at least one programmable processor, which can be a dedicated or general-purpose programmable processor that can receive data and instructions from a storage system, at least one input device, and at least one output device, and transmit the data and instructions to the storage system, the at least one input device, and the at least one output device.

[0130] The computer program for implementing the method of the present invention can be written in any combination of one or more programming languages. These computer programs can be provided to the processor of a general-purpose computer, a special-purpose computer, or other programmable data processing device, such that when the computer program is executed by the processor, the functions / operations specified in the flowchart and / or block diagram are implemented. The computer program can be executed entirely on the machine, partially on the machine, as a stand-alone software package partially on the machine and partially on a remote machine, or entirely on a remote machine or server.

[0131] In the context of the present invention, a computer-readable storage medium can be a tangible medium that can contain or store a computer program for use by or in connection with an instruction execution system, apparatus, or device. The computer-readable storage medium can include, but is not limited to, electronic, magnetic, optical, electromagnetic, infrared, or semiconductor systems, apparatus, or devices, or any suitable combination of the foregoing. Alternatively, the computer-readable storage medium can be a machine-readable signal medium. More specific examples of the machine-readable storage medium would include an electrical connection based on 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 disc read-only memory (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination of the foregoing.

[0132] To provide for interaction with a user, the systems and techniques described herein can be implemented on a range hood that includes: a display device (e.g., a CRT (cathode ray tube) or LCD (liquid crystal display) monitor) for displaying information to the user; and a keyboard and a pointing device (e.g., a mouse or a trackball) by which the user can provide input to the range hood. Other kinds of devices can also be used to provide for interaction with the user; for example, feedback provided to the user can be any form of sensory feedback (e.g., visual feedback, auditory feedback, or tactile feedback); and input from the user can be received in any form (including acoustic input, voice input, or tactile input).

[0133] The systems and techniques described herein can be implemented in a computing system that includes backend components (e.g., as a data server), or a computing system that includes middleware components (e.g., an application server), or a computing system that includes frontend components (e.g., a user computer having a graphical user interface or a web browser through which the user can interact with an implementation of the systems and techniques described herein), or a computing system that includes any combination of such backend components, middleware components, or frontend components. The components of the system can be interconnected by any form or medium of digital data communication (e.g., a communication network). Examples of communication networks include: a local area network (LAN), a wide area network (WAN), a blockchain network, and the Internet.

[0134] A computing system may include a client and a server. The client and the server are generally far from each other and usually interact via a communication network. The client-server relationship is created by computer programs running on respective computers and having a client-server relationship with each other. The server may be a cloud server, also known as a cloud computing server or a cloud host, which is a host product in the cloud computing service system, solving the defects of difficult management and weak business scalability existing in traditional physical hosts and VPS services.

[0135] It should be understood that various forms of processes shown above can be used, with steps reordered, added, or deleted. For example, the steps described in the present invention can be executed in parallel, sequentially, or in a different order, as long as the desired results of the technical solution of the present invention can be achieved, and no limitation is imposed herein.

[0136] The above specific embodiments do not constitute a limitation on the protection scope of the present invention. Those skilled in the art should understand that various modifications, combinations, sub-combinations, and substitutions can be made according to design requirements and other factors. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention shall be included within the protection scope of the present invention.

Claims

1. A control method for an oil fume suction machine, characterized in that, The range hood includes a reference microphone and a secondary speaker. The reference microphone is installed inside the main cabinet of the range hood, and the secondary speaker is arranged inside the smoke collecting cavity of the range hood. The range hood control method includes: Controlling the reference microphone to collect the real-time sound pressure of the range hood, and obtaining the real-time audio sound pressure when the secondary speaker plays the regulation audio converted based on the real-time sound pressure of the range hood; Determining the reference sound pressure at which the real-time audio sound pressure reaches the reference microphone according to the real-time audio sound pressure, and determining the body noise sound pressure level of the range hood according to the reference sound pressure and the real-time sound pressure of the range hood; Determining the current playback volume opening of the secondary speaker of the range hood when operating at the current gear according to the body noise sound pressure level; 2. The control method of the range hood according to claim 1, wherein Before determining the reference sound pressure at which the real-time audio sound pressure reaches the reference microphone according to the real-time audio sound pressure, it further includes: Obtaining the sound transfer function between the secondary speaker and the reference microphone; Determining the reference sound pressure at which the real-time audio sound pressure reaches the reference microphone according to the real-time audio sound pressure, including: Determining the reference sound pressure at which the real-time audio sound pressure reaches the reference microphone according to the real-time audio sound pressure and the sound transfer function; 3. The control method of the range hood according to claim 1, wherein, The range hood control method further includes: Generating a sound pressure-volume curve of the range hood based on the playback audio volume of the range hood and the corresponding noise data sound pressure level generated during the working noise test experiment of the range hood, and obtaining a pre-calibrated upper threshold range hood noise sound pressure level; 4. The range hood control method according to claim 3, characterized in that, Determining the current playback volume opening of the secondary speaker of the range hood when operating at the current gear according to the body noise sound pressure level, including: Determining the corresponding curve slope according to the body noise sound pressure level and the sound pressure-volume curve; Determining the current playback volume opening of the secondary speaker of the range hood when operating at the current gear according to the body noise sound pressure level, the curve slope, and the upper threshold range hood noise sound pressure level; 5. The method for controlling a range hood according to claim 4, wherein Before determining the current playback volume opening of the secondary speaker of the range hood when operating at the current gear according to the body noise sound pressure level, the curve slope, and the upper threshold range hood noise sound pressure level, it further includes: Obtaining the initial playback volume opening of the secondary speaker; Determining the current playback volume opening of the secondary speaker of the range hood when operating at the current gear according to the body noise sound pressure level, the curve slope, and the upper threshold range hood noise sound pressure level, including: Determining the current playback volume opening of the secondary speaker of the range hood when operating at the current gear based on the following formula, specifically: Among them, V (x) is the current playback volume opening; V0 is the initial playback volume opening; SPL(n) is the body noise sound pressure level; SPL max is the upper threshold range hood noise sound pressure level; k is the curve slope.

6. The control method of the range hood according to claim 1, wherein The range hood control method further includes: Obtaining the kitchen data where the range hood is located, and storing the kitchen data and the body noise sound pressure level of the range hood when operating at the current gear in the range hood correspondingly, so that when the range hood is used next time, the current playback volume opening of the corresponding secondary speaker can be directly called after the body noise sound pressure level is determined for operation and playback.

7. The control method of the range hood according to claim 1, characterized in that Determining the body noise sound pressure level of the range hood, including: Obtaining the kitchen data at the location where the range hood is located, and calling the corresponding body noise sound pressure level of the range hood stored in the range hood under the current gear operation according to the kitchen data.

8. An oil fume suction machine control device, characterized in that, The range hood includes a reference microphone and a secondary speaker. The reference microphone is installed inside the main cabinet of the range hood, and the secondary speaker is arranged inside the smoke collecting cavity of the range hood. The range hood control device includes: A real-time sound pressure acquisition module, configured to control the reference microphone to collect the real-time range hood sound pressure of the range hood, and obtain the real-time audio sound pressure when the secondary speaker plays the regulated audio converted based on the real-time range hood sound pressure. A body noise sound pressure level determination module, configured to determine the reference sound pressure of the real-time audio sound pressure reaching the reference microphone according to the real-time audio sound pressure, and determine the body noise sound pressure level of the range hood according to the reference sound pressure and the real-time range hood sound pressure. A volume opening determination module, configured to determine the current playback volume opening of the secondary speaker of the range hood under the current gear operation according to the body noise sound pressure level.

9. A range hood, characterized in that, The range hood includes a reference microphone and a secondary speaker. The reference microphone is installed inside the main cabinet of the range hood, and the secondary speaker is arranged inside the smoke collecting cavity of the range hood; The range hood further includes: At least one processor; and, A memory communicatively connected to the at least one processor; wherein, The memory stores a computer program executable by the at least one processor. The computer program is executed by the at least one processor so that the at least one processor can execute the range hood control method according to any one of claims 1-7.

10. A computer-readable storage medium, characterized in that, The computer-readable storage medium stores computer instructions for causing a processor to implement the range hood control method according to any one of claims 1-7 when executed.

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