Noise processing method and device of range hood, and range hood

Abstract

The present disclosure discloses a noise processing method and device of a range hood and the range hood. The range hood comprises a volute and a motor, at least one detection point is arranged on the volute, and the noise processing method of the range hood comprises the following steps: acquiring the amplitude of the detection point and the noise spectrum of the range hood during driving the motor to operate at different rotating speeds; determining a first frequency set according to the rotating speed corresponding to the amplitude; determining a second frequency set according to the noise spectrum within the excitation frequency range of the motor; determining the frequency within a preset range in the first frequency set as a target frequency; and performing noise processing according to the target frequency. According to the amplitude of the detection point arranged on the volute during the operation of the motor at different rotating speeds and the noise condition of the range hood, the present disclosure screens the target frequency which is easy to cause the resonance of the range hood to generate noise, and the noise processing according to the target frequency can achieve the effect of effectively reducing noise, thereby improving the user experience.

Description

Technical Field

[0001] This disclosure relates to the field of range hood technology, and in particular to a noise reduction method and apparatus for a range hood, and a range hood itself. Background Technology

[0002] Range hoods are common household appliances in home kitchens. A range hood is mainly supported by a top and rear panel, which houses the air guide plate and control panel. Inside the casing are components such as the volute, motor, and impeller. When the power is on, the motor drives the impeller to rotate at high speed, creating an air pressure difference between the inside and outside of the air inlet and outlet. This causes the cooking fumes to rotate and be accelerated outwards along with the air inside the volute. Simultaneously, during the fume extraction process, some high-temperature oil particles in the fumes are thrown onto the inner wall of the volute by the centrifugal force of the impeller, condensing into oil droplets that flow back to the oil collection device under gravity.

[0003] As users accumulate usage time and factors such as kitchen back pressure environment influence, the internal structure of the range hood will change, resulting in inconsistencies with the factory structural parameters. Therefore, combined with the excitation of the motor, the inducing factors of range hood noise will become uncontrollable. Summary of the Invention

[0004] The technical problem to be solved by this disclosure is to overcome the defect that the inducing factors of range hood noise in the prior art become uncontrollable. It provides a noise treatment method and device for range hood, range hood, computer-readable storage medium and computer program product, which can screen out the target frequencies that are likely to cause resonance and noise in range hood. The noise treatment based on the target frequencies can achieve effective noise reduction, thereby improving the user experience of using range hood.

[0005] This disclosure solves the above-mentioned technical problems through the following technical solution:

[0006] The first aspect of this disclosure provides a noise reduction method for a range hood, the range hood including a volute and a motor, the volute having at least one detection point, the noise reduction method comprising the following steps:

[0007] During the process of driving the motor to run at different speeds, the amplitude of the detection point and the noise spectrum of the range hood are obtained;

[0008] The first frequency set is determined based on the rotational speed corresponding to the amplitude;

[0009] A second set of frequencies is determined based on the noise spectrum within the excitation frequency range of the motor;

[0010] The frequencies within a preset range in the first frequency set are determined as target frequencies; wherein the preset range is determined based on the second frequency set;

[0011] Noise processing is performed based on the target frequency.

[0012] Optionally, the step of determining the first frequency set based on the rotational speed corresponding to the amplitude specifically includes:

[0013] The rotational speed corresponding to the amplitude that is greater than the preset threshold is determined as the target rotational speed;

[0014] The first frequency set is determined based on the frequency corresponding to the target rotational speed.

[0015] Optionally, the step of determining the second frequency set based on the noise spectrum within the excitation frequency range of the motor specifically includes:

[0016] For different rotational speeds, determine the peak value of the noise spectrum within the excitation frequency range of the motor;

[0017] The second frequency set is determined based on the frequency corresponding to the peak value.

[0018] Optionally, the step of performing noise processing based on the target frequency specifically includes:

[0019] Noise processing is performed based on the detection points corresponding to the target frequency.

[0020] Optionally, the volute is provided with at least two regions, and each region is provided with the detection point;

[0021] The step of performing noise processing based on the detection point corresponding to the target frequency specifically includes:

[0022] Noise processing is performed based on the area where the detection point corresponding to the target frequency is located.

[0023] Optionally, the step of performing noise processing based on the region where the detection point corresponding to the target frequency is located specifically includes:

[0024] If at least two target detection points are located in the same area, then noise processing is performed on the area; wherein, the target detection point is the detection point corresponding to the target frequency.

[0025] A second aspect of this disclosure provides a noise reduction device for a range hood, the range hood including a volute and a motor, the volute having at least one detection point, the noise reduction device comprising:

[0026] The information acquisition module is used to acquire the amplitude of the detection point and the noise spectrum of the range hood during the process of driving the motor to run at different speeds;

[0027] The first determining module is used to determine a first set of frequencies based on the rotational speed corresponding to the amplitude.

[0028] The second determining module is used to determine a second set of frequencies based on the noise spectrum within the excitation frequency range of the motor.

[0029] The third determining module is used to determine the frequencies in the first frequency set that fall within a preset range as target frequencies; wherein the preset range is determined based on the second frequency set;

[0030] A noise processing module is used to process noise according to the target frequency.

[0031] Optionally, the first determining module is specifically used to determine the rotational speed corresponding to the amplitude greater than a preset threshold as the target rotational speed, and to determine a first frequency set based on the frequency corresponding to the target rotational speed.

[0032] Optionally, the second determining module is specifically used to determine the peak value of the noise spectrum within the excitation frequency range of the motor for different rotational speeds, and to determine a second frequency set based on the frequency corresponding to the peak value.

[0033] Optionally, the noise processing module is specifically used to perform noise processing based on the detection points corresponding to the target frequency.

[0034] Optionally, the volute has at least two regions, each of which has the detection point; the noise processing module is specifically used to perform noise processing based on the region where the detection point corresponding to the target frequency is located.

[0035] Optionally, the noise processing module is specifically used to process the noise in the region where at least two target detection points are located in the same region; wherein the target detection point is the detection point corresponding to the target frequency.

[0036] A third aspect of this disclosure provides a range hood including a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor, when executing the computer program, implements the noise processing method as described in the first aspect.

[0037] A fourth aspect of this disclosure provides a computer-readable storage medium having a computer program stored thereon, which, when executed by a processor, implements the noise processing method as described in the first aspect.

[0038] The fifth aspect of this disclosure provides a computer program product including a computer program that, when executed by a processor, implements the steps of the noise processing method described in the first aspect.

[0039] Based on common knowledge in the field, the above optional conditions can be combined arbitrarily to obtain the preferred embodiments of this disclosure.

[0040] The positive and progressive effects of this disclosure are as follows: by setting detection points on the volute and selecting target frequencies that are prone to causing resonance and noise in the range hood based on the amplitude of the detection points during the operation of the motor at different speeds and the noise situation of the range hood, noise processing based on the target frequencies can achieve effective noise reduction, thereby improving the user experience of using the range hood. Attached Figure Description

[0041] Figure 1 This is a flowchart of a noise reduction method for a range hood provided in Embodiment 1 of this disclosure.

[0042] Figure 2 This is a three-dimensional structural diagram of a volute provided in Embodiment 1 of this disclosure.

[0043] Figure 3 This is a schematic diagram of the partitioning of a volute provided in Embodiment 1 of this disclosure.

[0044] Figure 4 A flowchart of another noise reduction method for a range hood provided in Embodiment 1 of this disclosure.

[0045] Figure 5 This is a structural block diagram of a noise reduction device for a range hood provided in Embodiment 1 of this disclosure.

[0046] Figure 6 This is a schematic diagram of the structure of a range hood provided in Embodiment 2 of this disclosure. Detailed Implementation

[0047] The present disclosure is further illustrated below by way of embodiments, but the present disclosure is not limited to the scope of the embodiments described herein.

[0048] Example 1

[0049] Figure 1 This is a flowchart illustrating a noise reduction method for a range hood provided in this embodiment. The noise reduction method for the range hood can be executed by a noise reduction device for the range hood. The noise reduction device for the range hood can be implemented by software and / or hardware. The noise reduction device for the range hood can be part or all of the range hood.

[0050] A range hood includes a volute and a motor, with at least one detection point on the volute. Figure 2 In the example shown, three detection points 22 are provided on the volute. The noise reduction method provided in this embodiment will be described below using a range hood as the primary device. Figure 1 As shown, the noise processing method provided in this embodiment may include the following steps S11 to S15:

[0051] Step S11: During the operation of the drive motor at different speeds, acquire the amplitude of the detection point and the noise spectrum of the range hood. Specifically, acquire the amplitude of the detection point and the noise spectrum of the range hood for different speeds.

[0052] Specifically, the motor can be driven by outputting a drive current. In a specific example, a pre-defined relationship between excitation force and drive current is established in the range hood. By outputting a certain drive current to the motor, the motor operates with the corresponding excitation force. This excitation force can be a unit excitation force or other types of excitation forces, and can be set according to the actual situation.

[0053] In practical implementation, accelerometers can be placed at each detection point to obtain the amplitude of the vibration at that point. Acceleration and amplitude are directly proportional; increased acceleration leads to increased amplitude, and decreased acceleration leads to decreased amplitude. Microphones can be installed in the range hood to collect noise signals from the motor during operation. Processing these noise signals yields a noise spectrum. Plotting frequency on the x-axis and noise intensity on the y-axis creates a noise spectrum, which is a distribution of noise intensity across frequencies, reflecting the frequency composition characteristics of the noise. The operating speed range of the drive motor is typically 200 rpm to 1500 rpm.

[0054] Step S12: Determine the first frequency set based on the rotational speed corresponding to the amplitude.

[0055] In practical implementation, the frequency corresponding to the rotational speed is determined based on the rotational speed corresponding to the amplitude, and these frequencies can constitute the first frequency set. The relationship between the rotational speed n and the frequency f can be: n = 60f / p, where p is the number of pole pairs of the motor.

[0056] Step S13: Determine a second frequency set based on the noise spectrum within the excitation frequency range of the motor.

[0057] The excitation frequency range of the motor can be f0 to f1, specifically referring to the range formed by the excitation frequencies of different orders of the motor. The motor order refers to the number of fundamental frequency cycles contained in one revolution of the motor, that is, the harmonics included in the change of the motor's output rotation angle. Different motors have different inherent order characteristics, such as 6th, 8th, 10th, 12th, 24th, 30th, and 48th orders. In a specific example, the motor speed is 880 rpm, and the corresponding orders include 6th, 8th, and 10th orders. The corresponding fundamental frequency is 880 / 60 = 14.6667 Hz. The excitation frequency of the 6th order is: 14.6667 Hz * 6 = 88 Hz, the excitation frequency of the 8th order is: 14.6667 Hz * 8 = 117 Hz, and the excitation frequency of the 10th order is: 14.6667 Hz * 10 = 146 Hz. Therefore, the excitation frequency range of the motor, f0 to f1, is 14.6667 Hz to 146 Hz.

[0058] Step S14: Determine the frequencies within a preset range in the first frequency set as target frequencies; wherein the preset range is determined based on the second frequency set. The target frequencies essentially include all frequencies that easily cause resonance and noise in the range hood.

[0059] In practical implementation, a preset range can be determined based on the second frequency set and the deviation value. The deviation value can be set according to actual conditions, such as ±1Hz or ±2Hz. In a specific example, the second frequency set f... s ={f s1 ,f s2 ,f s3 ,...f sm The deviation value is ±2Hz, and the preset range is f. sf ={f sf1 ,f sf2 ,f sf3 ,...f sfm}, where f sf =±2Hz+f s That is, f sf1 =±2Hz+f s1 f sf2 =±2Hz+f s2 f sf3 =±2Hz+f s3 , ...f sfm =±2Hz+f sm .

[0060] Step S15: Perform noise processing according to the target frequency.

[0061] In this embodiment, by setting detection points on the volute and selecting target frequencies that are likely to cause resonance and noise in the range hood based on the amplitude of the detection points during the operation of the motor at different speeds and the noise level of the range hood, noise processing based on the target frequencies can achieve effective noise reduction, thereby improving the user experience of using the range hood.

[0062] In one optional implementation of step S12, a first frequency set is determined based on the rotational speeds corresponding to all amplitudes. Here, "all amplitudes" refers to the amplitudes of all detection points acquired for all rotational speeds in step S11, i.e., the first frequency set is determined based on the frequencies corresponding to all rotational speeds in step S11.

[0063] In another optional embodiment of step S12, the rotational speed corresponding to an amplitude greater than a preset threshold is determined as the target rotational speed, and a first set of frequencies is determined based on the frequencies corresponding to the target rotational speed. The preset threshold Acp characterizes the vibration amplitude corresponding to the point of resonance or near resonance, and can be set according to actual conditions. In this embodiment, the corresponding rotational speed, i.e., the target rotational speed, is first determined based on the amplitude greater than the preset threshold, and then the corresponding frequencies are determined based on the target rotational speed. These frequencies are the frequencies at which the range hood resonates. Compared to the aforementioned embodiment, this constitutes a first set of frequencies including fewer frequencies, thereby improving the efficiency of selecting target frequencies.

[0064] In one optional embodiment of step S13, for different rotational speeds, the peak value of the noise spectrum within the excitation frequency range of the motor is determined, and a second frequency set is determined based on the frequency corresponding to the peak value. In this embodiment, frequencies that contribute significantly to the peak value in the noise spectrum are selected from the first frequency set, i.e., target frequencies that are likely to cause resonance and noise generation in the range hood are selected.

[0065] In another optional embodiment of step S13, for different rotational speeds, the peak and second peak values ​​of the noise spectrum within the excitation frequency range of the motor are determined, and a second frequency set is determined based on the frequencies corresponding to the peak and second peak values. In this embodiment, frequencies that contribute significantly to the peak and second peak values ​​in the noise spectrum are selected from the first frequency set; that is, target frequencies that are prone to causing resonance and noise generation in the range hood are selected. Noise processing based on these target frequencies can more effectively reduce noise.

[0066] In one optional embodiment of step S15, during the process of controlling the motor to run, the motor is kept away from running at a speed corresponding to the target frequency, thereby achieving the effect of noise reduction for the range hood.

[0067] In one optional implementation, step S15 specifically includes step S151: performing noise processing based on the detection points corresponding to the target frequency. In a specific implementation, when determining the target frequency... fw Then first according to nw =60 fw / p determines its corresponding rotational speed nw Then according to the rotation speed nw The corresponding amplitude is determined, and then the corresponding detection point is determined based on the amplitude. In this embodiment, the detection point corresponding to the target frequency is the detection point that is prone to resonance. By performing noise processing on the detection points that are prone to resonance, the noise reduction effect of the range hood can be achieved.

[0068] In one optional embodiment, the volute is provided with at least two regions, each region having the detection point. In this embodiment, step S151 specifically includes step S1511: performing noise processing on the region where the detection point corresponding to the target frequency is located, that is, by performing noise processing on the region that is prone to resonance, the noise reduction effect of the range hood can be achieved.

[0069] In such Figure 3 In the example shown, the rear cover of the volute is divided into four regions: upper right region 301, upper left region 302, lower left region 303, and lower right region 304, with multiple detection points 22 in each region. In practical applications, typically 5 to 6 detection points are set in each of the four regions of the volute's rear cover.

[0070] In one optional embodiment of step S1511, if at least two target detection points are located in the same area, then noise processing is performed on the area; wherein, the target detection point is the detection point corresponding to the target frequency. In this embodiment, the fact that at least two target detection points are located in the same area indicates that the area poses a greater risk of causing noise, and it is necessary to suppress the vibration generated in the area, thereby achieving noise reduction for the range hood.

[0071] In another optional embodiment of step S1511, in order to more effectively reduce the noise of the range hood, noise processing can be performed on the area where all target detection points are located.

[0072] In practice, noise reduction of the range hood can be achieved by setting vibration damping components, such as vibration damping, at the detection point corresponding to the target frequency, in the area where the target detection point is located, or in an area including at least two target detection points.

[0073] This embodiment also provides a method for noise reduction of a range hood, such as... Figure 4 As shown, it includes the following steps S21 to S25:

[0074] Step S21: During the operation of the drive motor at different speeds, acquire the amplitude of each detection point and the noise spectrum of the range hood. For specific implementation details, refer to step S11 above.

[0075] Step S22: Determine the rotational speed corresponding to the amplitude greater than a preset threshold as the target rotational speed, and determine the first frequency set f based on the frequency corresponding to the target rotational speed. p .

[0076] Step S23: For different rotational speeds, determine the peak value of the noise spectrum within the excitation frequency range of the motor, and determine the second frequency set f based on the frequency corresponding to the peak value. s .

[0077] Step S24: Select the frequencies in the first frequency set that fall within the preset range f sf The frequency within is determined as the target frequency f. w Among them, the preset range f sf According to the second frequency set f s Determined. Specifically, the target frequency f w Including the first frequency set f p The content conforms to the preset range f sf The frequency, i.e., f w ={f p |f sf For specific implementation details, please refer to step S14 above.

[0078] Step S25: If at least two target detection points are located in the same area, then noise processing is performed on the area; wherein, the target detection point is the detection point corresponding to the target frequency.

[0079] In this embodiment, the target frequency f that is likely to cause resonance and noise in the range hood is selected based on the amplitude of the detection points during the operation of the motor at different speeds and the noise level of the range hood. w By performing noise processing on an area containing at least two target detection points, effective noise reduction can be achieved, thereby improving the user experience of using the range hood.

[0080] This embodiment also provides a noise reduction device for a range hood, the range hood including a volute and a motor, wherein the volute is provided with at least one detection point, such as... Figure 5 As shown, the noise processing device 500 includes an information acquisition module 501, a first determination module 502, a second determination module 503, a third determination module 504, and a noise processing module 505.

[0081] The information acquisition module 501 is used to acquire the amplitude of the detection point and the noise spectrum of the range hood during the process of driving the motor to run at different speeds. Specifically, the amplitude of the detection point and the noise spectrum of the range hood are acquired for different speeds.

[0082] Specifically, the motor can be driven by outputting a drive current. In a specific example, a pre-defined relationship between excitation force and drive current is established in the range hood. By outputting a certain drive current to the motor, the motor operates with the corresponding excitation force. This excitation force can be a unit excitation force or other types of excitation forces, and can be set according to the actual situation.

[0083] In practical implementation, accelerometers can be placed at each detection point to obtain the amplitude of the vibration at that point. Acceleration and amplitude are directly proportional; increased acceleration leads to increased amplitude, and decreased acceleration leads to decreased amplitude. Microphones can be installed in the range hood to collect noise signals from the motor during operation. Processing these noise signals yields a noise spectrum. Plotting frequency on the x-axis and noise intensity on the y-axis creates a noise spectrum, which is a distribution of noise intensity across frequencies, reflecting the frequency composition characteristics of the noise. The operating speed range of the drive motor is typically 200 rpm to 1500 rpm.

[0084] The first determining module 502 is used to determine a first set of frequencies based on the rotational speed corresponding to the amplitude. In a specific implementation, the frequencies corresponding to the rotational speeds are determined based on the rotational speeds corresponding to the amplitudes, and these frequencies can constitute the first set of frequencies. The relationship between the rotational speed n and the frequency f can be: n = 60f / p, where p is the number of pole pairs of the motor.

[0085] The second determining module 503 is used to determine a second frequency set based on the noise spectrum within the excitation frequency range of the motor. The excitation frequency range of the motor can be f0 to f1, specifically referring to the range comprised of excitation frequencies of different orders of the motor. The motor order refers to the number of fundamental frequency cycles contained in one revolution of the motor, i.e., the harmonics included in the variation of the motor's output rotation angle. Different motors have different inherent order characteristics, such as 6th, 8th, 10th, 12th, 24th, 30th, and 48th orders. In a specific example, the motor speed is 880 rpm. The motor order includes 6th, 8th, and 10th orders, with a fundamental frequency of 880 / 60 = 14.6667 Hz. The excitation frequency of the 6th order is 14.6667 Hz * 6 = 88 Hz, the excitation frequency of the 8th order is 14.6667 Hz * 8 = 117 Hz, and the excitation frequency of the 10th order is 14.6667 Hz * 10 = 146 Hz. Therefore, the excitation frequency range of the motor, f0 to f1, is 14.6667 Hz to 146 Hz.

[0086] The third determining module 504 is used to determine the frequencies within a preset range in the first frequency set as target frequencies; wherein the preset range is determined according to the second frequency set. The target frequencies essentially include all frequencies that are likely to cause resonance and noise in the range hood.

[0087] In practical implementation, a preset range can be determined based on the second frequency set and the deviation value. The deviation value can be set according to actual conditions, such as ±1Hz or ±2Hz. In a specific example, the second frequency set f... s ={f s1 ,f s2 ,f s3 ,...f sm The deviation value is ±2Hz, and the preset range is f. sf ={f sf1 ,f sf2 ,f sf3 ,...f sfm}, where f sf =±2Hz+f s That is, f sf1 =±2Hz+f s1 f sf2 =±2Hz+f s2 f sf3 =±2Hz+f s3 , ...f sfm =±2Hz+f sm .

[0088] The noise processing module 505 is used to process noise according to the target frequency.

[0089] In one optional implementation, the first determining module 502 is specifically used to determine a first frequency set based on the rotational speeds corresponding to all amplitudes.

[0090] In one optional implementation, the first determining module 502 is specifically used to determine the rotational speed corresponding to the amplitude greater than a preset threshold as the target rotational speed, and to determine a first frequency set based on the frequency corresponding to the target rotational speed.

[0091] In one optional implementation, the second determining module 503 is specifically used to determine the peak value of the noise spectrum within the excitation frequency range of the motor for different rotational speeds, and to determine a second frequency set based on the frequency corresponding to the peak value.

[0092] In one optional implementation, the second determining module 503 is specifically used to determine the peak and sub-peak values ​​of the noise spectrum within the excitation frequency range of the motor for different rotational speeds, and to determine a second frequency set based on the frequencies corresponding to the peak and sub-peak values.

[0093] In one optional implementation, the noise processing module 505 is specifically used to perform noise processing based on the detection point corresponding to the target frequency.

[0094] In one optional embodiment, the volute has at least two regions, each containing the detection point. The noise processing module 505 is specifically used to perform noise processing based on the region where the detection point corresponding to the target frequency is located.

[0095] In one optional implementation, the noise processing module 505 is specifically used to perform noise processing on the region when at least two target detection points are located in the same region; wherein, the target detection point is the detection point corresponding to the target frequency.

[0096] It should be noted that, in this embodiment, the noise processing device of the range hood can be a separate chip, a chip module, or the range hood itself, or it can be a chip or a chip module integrated into the range hood.

[0097] Regarding the various modules / units included in the noise treatment device for the range hood described in this embodiment, they may be software modules / units, hardware modules / units, or a combination of both.

[0098] Example 2

[0099] Figure 6This is a schematic diagram of a range hood provided in this embodiment. The range hood includes a volute, a motor, at least one processor, and a memory communicatively connected to the at least one processor. The memory stores a computer program that can be executed by the at least one processor, enabling the at least one processor to perform the noise reduction method for the range hood in Embodiment 1. Figure 6 The range hood 3 shown is merely an example and should not impose any limitation on the functionality and scope of use of the embodiments disclosed herein.

[0100] The components of the range hood 3 may include, but are not limited to: the aforementioned volute, the aforementioned motor, at least one of the aforementioned processors 4, at least one of the aforementioned memory 5, and a bus 6 connecting different system components (including memory 5 and processor 4).

[0101] Bus 6 includes a data bus, an address bus, and a control bus.

[0102] The memory 5 may include volatile memory, such as random access memory (RAM) 51 and / or cache memory 52, and may further include read-only memory (ROM) 53.

[0103] The memory 5 may also include a program / utility 55 having a set (at least one) of program modules 54, including but not limited to: an operating system, one or more application programs, other program modules, and program data, each or some combination of these examples may include an implementation of a network environment.

[0104] The processor 4 executes various functional applications and data processing by running computer programs stored in the memory 5, such as the noise reduction method of the range hood mentioned above.

[0105] The range hood 3 can also communicate with one or more external devices 7 (e.g., keyboard, pointing device, etc.). This communication can be achieved through the input / output (I / O) interface 8. Furthermore, the range hood 3 can also communicate with one or more networks (e.g., local area network (LAN), wide area network (WAN), and / or public networks, such as the Internet) via the network adapter 9. Figure 6 As shown, network adapter 9 communicates with other modules of range hood 3 via bus 6. It should be understood that, although... Figure 6 As not shown in the diagram, it can be used in conjunction with the range hood 3 and other hardware and / or software modules, including but not limited to: microcode, device drivers, redundant processors, external disk drive arrays, RAID (disk array) systems, tape drives, and data backup storage systems.

[0106] It should be noted that although several units / modules or sub-units / modules of the range hood have been mentioned in the detailed description above, this division is merely exemplary and not mandatory. In fact, according to embodiments of this disclosure, the features and functions of two or more units / modules described above can be embodied in one unit / module. Conversely, the features and functions of one unit / module described above can be further divided and embodied by multiple units / modules.

[0107] Example 3

[0108] This embodiment provides a computer-readable storage medium storing a computer program, which, when executed by a processor, implements the noise reduction method for the range hood in Embodiment 1.

[0109] The readable storage medium may be more specifically adopted, including but not limited to: portable disk, hard disk, random access memory, read-only memory, erasable programmable read-only memory, optical storage device, magnetic storage device, or any suitable combination thereof.

[0110] In possible implementations, this disclosure may also be implemented as a computer program product comprising a computer program that, when executed by a processor, implements the steps of the noise processing method in Embodiment 1.

[0111] The computer program for executing the present disclosure can be written in any combination of one or more programming languages, and the computer program can be executed entirely on the range hood, partially on the range hood, as a standalone software package, partially on the range hood and partially on a remote device, or entirely on a remote device.

[0112] While specific embodiments of this disclosure have been described above, those skilled in the art should understand that these are merely illustrative examples, and the scope of protection of this disclosure is defined by the appended claims. Those skilled in the art can make various changes or modifications to these embodiments without departing from the principles and essence of this disclosure, but all such changes and modifications fall within the scope of protection of this disclosure.

Claims

1. A method for noise reduction in a range hood, characterized in that, The range hood includes a volute and a motor, and the volute is provided with at least one detection point. The noise reduction method includes the following steps: During the process of driving the motor to run at different speeds, the amplitude of the detection point and the noise spectrum of the range hood are obtained; The first frequency set is determined based on the rotational speed corresponding to the amplitude; A second set of frequencies is determined based on the noise spectrum within the excitation frequency range of the motor; The frequencies within a preset range in the first frequency set are determined as target frequencies; wherein the preset range is determined based on the second frequency set; Noise processing is performed based on the target frequency.

2. The noise processing method as described in claim 1, characterized in that, The step of determining the first frequency set based on the rotational speed corresponding to the amplitude specifically includes: The rotational speed corresponding to the amplitude that is greater than the preset threshold is determined as the target rotational speed; The first frequency set is determined based on the frequency corresponding to the target rotational speed.

3. The noise processing method as described in claim 1, characterized in that, The step of determining the second frequency set based on the noise spectrum within the excitation frequency range of the motor specifically includes: For different rotational speeds, determine the peak value of the noise spectrum within the excitation frequency range of the motor; The second frequency set is determined based on the frequency corresponding to the peak value.

4. The noise treatment method according to any one of claims 1-3, characterized in that, The step of performing noise processing based on the target frequency specifically includes: Noise processing is performed based on the detection points corresponding to the target frequency.

5. The noise treatment method as described in claim 4, characterized in that, The volute has at least two regions, and each region has the detection point. The step of performing noise processing based on the detection point corresponding to the target frequency specifically includes: Noise processing is performed based on the area where the detection point corresponding to the target frequency is located.

6. The noise processing method as described in claim 5, characterized in that, The step of performing noise processing based on the region where the detection point corresponding to the target frequency is located specifically includes: If at least two target detection points are located in the same area, then noise processing is performed on the area; wherein, the target detection point is the detection point corresponding to the target frequency.

7. A noise reduction device for a range hood, characterized in that, The range hood includes a volute and a motor, the volute having at least one detection point, and the noise reduction device includes: The information acquisition module is used to acquire the amplitude of the detection point and the noise spectrum of the range hood during the process of driving the motor to run at different speeds; The first determining module is used to determine a first set of frequencies based on the rotational speed corresponding to the amplitude. The second determining module is used to determine a second set of frequencies based on the noise spectrum within the excitation frequency range of the motor. The third determining module is used to determine the frequencies in the first frequency set that fall within a preset range as target frequencies; wherein the preset range is determined based on the second frequency set; A noise processing module is used to process noise according to the target frequency.

8. A range hood, comprising a volute, a motor, a memory, a processor, and a computer program stored in the memory and executable on the processor, characterized in that, When the processor executes the computer program, it implements the noise processing method as described in any one of claims 1-6.

9. A computer-readable storage medium having a computer program stored thereon, characterized in that, When the computer program is executed by the processor, it implements the noise processing method as described in any one of claims 1-6.

10. A computer program product, comprising a computer program, characterized in that, When the computer program is executed by a processor, it implements the steps of the noise processing method according to any one of claims 1-6.

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