Control method and device of range hood and electronic equipment

Abstract

The application belongs to the technical field of kitchen appliances, and particularly relates to a control method and device of an extractor hood and electronic equipment. The first offset displacement and the first vibration acceleration of a motor of the extractor hood are acquired, the vibration level of the motor is determined according to the first offset displacement and the first vibration acceleration, and the rotating speed of the motor of the extractor hood is adjusted according to the vibration level. The rotating speed of the motor is actively reduced, noise is avoided, vibration is inhibited, the abrasion and resonance effect of mechanical components are reduced, and the risk of structure loosening or part falling of the extractor hood caused by vibration is reduced.

Description

Technical Field

[0001] This application relates to the field of kitchen appliance technology, and in particular to a control method, device and electronic equipment for a range hood. Background Technology

[0002] As modern families increasingly demand a more comfortable kitchen environment, the performance of range hoods, as a core kitchen appliance, directly impacts the user's cooking experience. In actual use, range hoods expel cooking fumes outdoors through the airflow generated by the high-speed rotation of the impeller. However, after prolonged use, grease can accumulate on the impeller surface, leading to dynamic imbalance and vibration. This vibration not only generates noise through air and structural transmission but may also exacerbate mechanical damage to the entire machine due to resonance effects, shortening the product's lifespan.

[0003] In existing technologies, the control logic of range hoods is mainly based on a fixed speed or preset air volume operating mode. The motor usually drives the impeller to rotate at a constant speed, and its speed adjustment depends only on manual operation by the user or automatic adjustment based on preset algorithms, such as adjusting the air volume according to the concentration of cooking fumes.

[0004] However, existing technologies do not consider the dynamic imbalance of the impeller caused by oil accumulation or mechanical wear during long-term operation, lack a dynamic speed adjustment strategy based on real-time detection data, and cannot actively reduce the motor speed to suppress vibration according to changes in impeller vibration amplitude and acceleration. The vibration effect generates noise and exacerbates mechanical damage to the range hood, affecting its lifespan. Summary of the Invention

[0005] This application provides a control method, device, and electronic device for a range hood, which solves the problem of vibration and noise caused by the fact that the range hood motor drives the impeller to operate at a constant speed and cannot capture the impeller imbalance state in real time during operation.

[0006] In a first aspect, this application provides a method for controlling a range hood, comprising:

[0007] Obtain the first offset displacement and the first vibration acceleration of the range hood motor;

[0008] The vibration level of the motor is determined based on the first offset displacement and the first vibration acceleration.

[0009] Adjust the speed of the range hood motor according to the vibration level.

[0010] Optionally, determining the vibration level of the motor based on the first offset displacement and the first vibration acceleration includes:

[0011] If the first offset displacement is greater than the first displacement threshold and the first vibration acceleration is greater than the first acceleration threshold, the motor is determined to be in first-order vibration.

[0012] Adjusting the speed of the range hood motor according to the vibration level includes:

[0013] The speed of the range hood motor is controlled to be reduced to the first target speed corresponding to the first level of vibration.

[0014] Optionally, after controlling the speed of the range hood motor to decrease to the first target speed corresponding to the first-level vibration, the method further includes:

[0015] Obtain the second offset displacement and second vibration acceleration of the range hood motor;

[0016] If the second offset displacement is greater than the second displacement threshold and the second vibration acceleration is greater than the second acceleration threshold, the motor is determined to be in a second-order vibration state.

[0017] The speed of the range hood motor is controlled to decrease to the second target speed corresponding to the secondary vibration; wherein the first displacement threshold is greater than the second displacement threshold, the first acceleration threshold is greater than the second acceleration threshold, and the first target speed is higher than the second target speed.

[0018] Optionally, the method further includes:

[0019] If the second offset displacement is not greater than the second displacement threshold and the second vibration acceleration is not greater than the second acceleration threshold, the range hood motor is controlled to maintain the current speed.

[0020] Optionally, obtaining the first offset displacement and the first vibration acceleration of the range hood motor includes:

[0021] Acquire the raw vibration acceleration collected by the accelerometer;

[0022] The original offset displacement is determined based on the original vibration acceleration.

[0023] The original offset displacement and the original vibration acceleration are denoised to obtain the first offset displacement and the first vibration acceleration.

[0024] Optionally, the method further includes:

[0025] Acquire the historical operating data of the range hood, including historical offset, historical vibration acceleration, and historical rotational speed;

[0026] Based on the historical operating data, the first displacement threshold and the first acceleration threshold, and / or the second displacement threshold and the second acceleration threshold are adaptively determined.

[0027] Optionally, after adjusting the speed of the range hood motor according to the vibration level, the method further includes:

[0028] Based on the historical operational data, a time series analysis algorithm is used to predict the trend of displacement and vibration acceleration changes within a future preset time period.

[0029] When the trend of change indicates that the offset displacement or vibration acceleration will exceed the first displacement threshold and the first acceleration threshold, or the second displacement threshold and the second acceleration threshold, in the future within a preset period of time, the rotational speed adjustment strategy is executed in advance to suppress the aggravation of actual vibration.

[0030] Secondly, this application provides a control device for a range hood, comprising:

[0031] The acquisition module is used to acquire the first offset displacement and the first vibration acceleration of the range hood motor;

[0032] The determining module is used to determine the vibration level of the motor based on the first offset displacement and the first vibration acceleration;

[0033] The processing module is used to adjust the speed of the range hood motor according to the vibration level.

[0034] Optionally, the determining module is further configured to determine that the motor is experiencing a first-order vibration when the first offset displacement is greater than a first displacement threshold and the first vibration acceleration is greater than a first acceleration threshold.

[0035] The processing module is also used to control the speed of the range hood motor to decrease to the first target speed corresponding to the first-level vibration.

[0036] Optionally, the acquisition module is further configured to acquire the second offset displacement and the second vibration acceleration of the range hood motor;

[0037] The determining module is further configured to determine that the motor is undergoing secondary vibration when the second offset displacement is greater than the second displacement threshold and the second vibration acceleration is greater than the second acceleration threshold.

[0038] The processing module is further configured to control the rotational speed of the range hood motor to decrease to the second target rotational speed corresponding to the secondary vibration; wherein the first displacement threshold is greater than the second displacement threshold, the first acceleration threshold is greater than the second acceleration threshold, and the first target rotational speed is higher than the second target rotational speed.

[0039] Optionally, the processing module is further configured to control the range hood motor to maintain the current rotation speed when the second offset displacement is not greater than the second displacement threshold and the second vibration acceleration is not greater than the second acceleration threshold.

[0040] Optionally, the acquisition module is further configured to acquire the raw vibration acceleration collected by the accelerometer.

[0041] The determining module is further configured to determine the original offset displacement based on the original vibration acceleration;

[0042] The processing module is further configured to perform noise reduction processing on the original offset displacement and the original vibration acceleration to obtain the first offset displacement and the first vibration acceleration.

[0043] Optionally, the acquisition module is further configured to acquire historical operating data of the range hood, the historical operating data including: historical offset displacement, historical vibration acceleration, and historical rotational speed;

[0044] The determining module is further configured to adaptively determine the first displacement threshold and the first acceleration threshold, and / or the second displacement threshold and the second acceleration threshold based on the historical operating data.

[0045] Optionally, the processing module is further configured to predict the trend of displacement and vibration acceleration changes within a future preset time period based on the historical operating data using a time series analysis algorithm;

[0046] The processing module is further configured to execute a rotational speed adjustment strategy in advance to suppress the aggravation of actual vibration when the trend of change indicates that the offset displacement or vibration acceleration will exceed the first displacement threshold and the first acceleration threshold, or the second displacement threshold and the second acceleration threshold, within a preset period of time in the future.

[0047] Thirdly, this application provides an electronic device, including: a processor, and a memory communicatively connected to the processor;

[0048] The memory stores computer-executed instructions;

[0049] The processor executes computer execution instructions stored in the memory to implement the range hood control method as described in the first aspect and various possible implementations of the first aspect.

[0050] Fourthly, this application provides a computer-readable storage medium storing computer-executable instructions thereon, which, when executed by a processor, are used to implement the range hood control method as described in the first aspect and various possible implementations of the first aspect.

[0051] Fifthly, this application provides a program product, including a computer program, which, when executed by a processor, implements the control method for a range hood as described above.

[0052] This application provides a control method, device, and electronic equipment for a range hood. By acquiring the first offset displacement and the first vibration acceleration of the range hood motor, the vibration level of the motor is determined based on the first offset displacement and the first vibration acceleration. The speed of the range hood motor is then adjusted according to the vibration level. This actively reduces the motor speed, avoids noise generation, suppresses vibration, reduces wear and resonance effects on mechanical parts, and lowers the risk of structural loosening or component detachment caused by vibration. Attached Figure Description

[0053] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with this application and, together with the description, serve to explain the principles of this application.

[0054] Figure 1 A flowchart illustrating a control method for a range hood provided in this application. Figure 1 ;

[0055] Figure 2 A flowchart illustrating a control method for a range hood provided in this application. Figure 2 ;

[0056] Figure 3 A flowchart illustrating a control method for a range hood provided in this application. Figure 3 ;

[0057] Figure 4 This application provides a schematic diagram of the structure of a control device for a range hood.

[0058] Figure 5 This is a structural schematic diagram of a control device for a range hood provided in this application.

[0059] The accompanying drawings have illustrated specific embodiments of this application, which will be described in more detail below. These drawings and descriptions are not intended to limit the scope of the concept in any way, but rather to illustrate the concept of this application to those skilled in the art through reference to specific embodiments. Detailed Implementation

[0060] Exemplary embodiments will now be described in detail, examples of which are illustrated in the accompanying drawings. When the following description relates to the drawings, unless otherwise indicated, the same numbers in different drawings represent the same or similar elements. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with this application. Rather, they are merely examples of apparatuses and methods consistent with some aspects of this application as detailed in the appended claims. All other embodiments obtained by those skilled in the art based on the embodiments of this application without inventive effort are within the scope of protection of this application.

[0061] It should be noted that the user information (including but not limited to user device information, user personal information, etc.) and data (including but not limited to data used for analysis, data stored, data displayed, etc.) involved in this application are all information and data authorized by the user or fully authorized by all parties. Furthermore, the collection, storage, use, processing, transmission, provision, disclosure, and application of the relevant data all comply with the relevant laws, regulations, and standards of the relevant regions, have taken necessary confidentiality measures, do not violate public order and good morals, and provide corresponding operation portals for users to choose to authorize or refuse.

[0062] Furthermore, the technical solution involved in this application, which involves big data analysis of user information (including but not limited to personal biometrics, identity data, consumption data, asset data, electronic terminal operation data, etc.) and the use of artificial intelligence technology for automated decision-making, and makes decisions that have a significant impact on personal rights based on the results of automated decision-making, provides users with corresponding operation entry points for users to choose to agree to or reject the results of automated decision-making; if the user chooses to reject, the process will proceed to the expert decision-making process.

[0063] It should be noted that the control method, device, and electronic equipment for range hoods provided in this application can be used in the field of kitchen appliance technology, or in any field other than kitchen appliances. The application fields of the control method, device, and electronic equipment for range hoods in this application are not limited.

[0064] As modern families increasingly demand a more comfortable kitchen environment, the operational stability of range hoods, as a core kitchen appliance, directly impacts the user's cooking experience. In actual use, range hoods rely on the high-speed rotation of an impeller to generate negative pressure and extract cooking fumes. However, after prolonged operation, grease easily accumulates on the impeller surface, leading to uneven mass distribution, disrupting dynamic balance, and causing vibration. This vibration not only generates noise through structural transmission and airborne propagation, reducing user comfort, but may also induce resonance under certain operating conditions, exacerbating fatigue of mechanical components and shortening the product's lifespan.

[0065] Most existing range hoods operate using a fixed speed or a preset airflow mode. The motor typically drives the impeller at a constant speed, and speed adjustment mainly relies on manual user intervention or adaptive airflow adjustment based on preset rules.

[0066] However, the above control methods do not take into account the vibration problem caused by the dynamic imbalance of the impeller due to factors such as oil accumulation, assembly deviation, or aging.

[0067] However, the control logic of existing technologies does not consider the dynamic imbalance of the impeller caused by oil accumulation or mechanical wear during long-term operation. The lack of a dynamic speed adjustment strategy based on real-time detection data prevents proactive intervention before vibration intensifies, making it difficult to effectively suppress noise and mechanical damage.

[0068] To address the aforementioned problems, this application proposes a control method, device, and electronic equipment for a range hood. By acquiring the first offset displacement and the first vibration acceleration of the range hood motor, the vibration level of the motor is determined based on these parameters. The motor speed is then adjusted according to the vibration level. This proactively reduces the motor speed, avoids noise generation, suppresses vibration, reduces wear and resonance effects on mechanical components, and lowers the risk of structural loosening or component detachment due to vibration.

[0069] The technical solution of this application and how the technical solution of this application solves the above-mentioned technical problems are described in detail below with specific embodiments. These specific embodiments can be combined with each other, and the same or similar concepts or processes may not be described again in some embodiments. The embodiments of this application will be described below with reference to the accompanying drawings.

[0070] Figure 1 A flowchart illustrating a control method for a range hood provided in this application embodiment. Figure 1 .like Figure 1 As shown, the control method for a range hood provided in this embodiment includes:

[0071] S101, Obtain the first offset displacement and the first vibration acceleration of the range hood motor.

[0072] Here, the first offset displacement represents the degree to which the impeller's center of mass deviates from the rotation axis, and the first vibration acceleration represents the instantaneous intensity of the vibration energy. The first offset displacement and the first vibration acceleration characterize the instantaneous shaking caused by airflow disturbance and the continuous unbalanced vibration caused by oil accumulation.

[0073] One possible implementation involves mounting at least one acceleration sensor on the motor housing of the range hood or on a support structure rigidly connected to the motor. The acceleration sensor is preferably positioned close to the motor rotor shaft to maximize the capture of radial or axial vibration signals caused by impeller imbalance. The sensor acquires the raw vibration acceleration signals during motor operation in real time, converts the analog signals into digital signals via an analog-to-digital converter, and transmits them to the main control unit of the range hood.

[0074] One possible implementation involves the main control unit of the range hood calculating the original displacement corresponding to the original vibration acceleration based on the original vibration acceleration collected by the accelerometer using a numerical integration method. Specifically, the main control unit averages the acceleration values ​​of two adjacent moments, multiplies them by the sampling time interval, and then adds this average to the velocity value of the previous moment, thus progressively calculating the velocity value corresponding to each moment. The same method is used to perform a second numerical integration on the obtained velocity sequence: averaging the velocity values ​​of two adjacent moments, multiplying them by the sampling time interval, and then adding this average to the displacement value of the previous moment, finally obtaining the original displacement corresponding to each moment. Discrete trapezoidal integration, zero-order hold, or a combination of high-pass filtering and integration are employed to suppress the interference of DC drift and low-frequency noise on the displacement calculation.

[0075] One possible implementation involves denoising the first offset displacement and the first vibration acceleration respectively. After denoising, the first offset displacement and the first vibration acceleration that effectively characterize the current vibration condition are obtained, providing a basis for subsequently determining the motor vibration level and adjusting the motor speed.

[0076] Preferably, to improve detection accuracy, multiple accelerometers are arranged in different orientations, and the ability to perceive complex vibration modes is further enhanced by fusing multiple acceleration data.

[0077] S102. Determine the vibration level of the motor based on the first offset displacement and the first vibration acceleration.

[0078] The range hood control system evaluates the current vibration level of the range hood motor based on the acquired first offset displacement and first vibration acceleration, thereby determining the current vibration level of the range hood.

[0079] One possible implementation of this invention is to divide the motor vibration into multiple levels by setting multi-level vibration thresholds, and to set corresponding control strategies for each level. Specifically, the two key parameters, offset displacement and vibration acceleration, are jointly divided into N vibration levels, where N≥2, and a set of joint judgment conditions for offset displacement and vibration acceleration are preset for each level. The range hood control system performs a graded evaluation of the motor's operating status based on the offset displacement and vibration acceleration to determine the motor's vibration level.

[0080] One possible implementation involves dividing the two key parameters, displacement and vibration acceleration, into three vibration levels: normal, level one, and level two. A set of joint judgment conditions based on displacement and vibration acceleration is preset for each level. Each vibration level i (i=1,2,3,…,N) corresponds to a displacement position threshold. Acceleration threshold and target speed .

[0081] The threshold satisfies a monotonically decreasing relationship, that is: , ;

[0082] Meanwhile, target speed It satisfies a monotonically decreasing relationship, that is: .

[0083] When the first offset displacement and the first vibration acceleration simultaneously meet a certain vibration level determination condition, that is: the first offset displacement is greater than And the first vibration acceleration is greater than If so, the motor is currently at vibration level i.

[0084] The severity of vibration is quantified and graded based on multi-level thresholds, which makes it easier for the motor to respond and intervene precisely as needed, avoiding a "one-size-fits-all" shutdown. This ensures the safety of the range hood while maintaining its smoke extraction performance to the maximum extent.

[0085] S103. Adjust the speed of the range hood motor according to the vibration level.

[0086] After determining the level of motor vibration, the motor speed is dynamically adjusted based on a preset mapping relationship between vibration level and target speed. This enables graded control of the range hood motor speed.

[0087] It should be noted that, because the thresholds decrease progressively, the judgment conditions of higher levels (such as Level 1 and Level 2) logically imply that the conditions of lower levels have already been met. Therefore, in the actual execution process, judgments can be made sequentially from high to low. Once a certain level is matched, the corresponding speed command is executed, and subsequent judgments are stopped to improve response efficiency.

[0088] Preferably, to avoid airflow impact caused by sudden changes in motor speed, a ramp-down speed reduction strategy is used to adjust the range hood motor speed. One possible implementation is to smoothly reduce the current speed to the speed corresponding to the vibration level with a preset slope. The slope can be dynamically adjusted according to the vibration level.

[0089] Preferably, after the speed adjustment is completed, the new offset displacement and vibration acceleration are continuously monitored. If the offset displacement and vibration acceleration fall back to the safe range, the current speed is maintained; if they still exceed the threshold, the vibration level is upgraded to further reduce the motor speed.

[0090] This embodiment provides a control method for a range hood. The method acquires the first offset displacement and the first vibration acceleration of the range hood motor, determines the vibration level of the motor based on these displacements, and adjusts the motor speed accordingly. This proactively reduces the motor speed, avoids noise generation, suppresses vibration to reduce wear and resonance effects on mechanical components, and lowers the risk of structural loosening or component detachment due to vibration.

[0091] Figure 2 A flowchart illustrating a control method for a range hood provided in this application embodiment. Figure 2 .like Figure 2 As shown, in Figure 1 Based on the embodiments, the control method of the range hood is described in detail, including:

[0092] S201. Obtain the raw vibration acceleration collected by the accelerometer.

[0093] S202. Determine the original offset displacement based on the original vibration acceleration.

[0094] S203. The original offset displacement and original vibration acceleration are denoised to obtain the first offset displacement and the first vibration acceleration.

[0095] The range hood has at least one acceleration sensor installed on the motor assembly or a structural component rigidly connected to it to sense the mechanical vibration state during motor operation in real time. Preferably, the sensor should be installed radially as close as possible to the center of rotation of the motor rotor to maximize the capture of structural vibrations excited by centrifugal force fluctuations caused by impeller imbalance.

[0096] Since accelerometers cannot directly measure displacement, the original displacement displacement, which reflects the degree of displacement of the impeller's center of mass, is indirectly obtained by integrating the vibration acceleration.

[0097] One possible implementation is that the original offset displacement and original vibration acceleration may contain high-frequency electronic noise or airflow pulsation interference. Therefore, the original offset displacement and original vibration acceleration are denoised to obtain a first offset displacement and a first vibration acceleration used for vibration level determination. The denoising method may include, for example, moving average filtering and / or low-pass filtering.

[0098] S204. If the first offset displacement is greater than the first displacement threshold and the first vibration acceleration is greater than the first acceleration threshold, the motor is determined to be in first-order vibration.

[0099] The range hood control system uses a dual-parameter joint threshold determination mechanism to identify the current vibration state of the motor. Specifically, the motor is determined to be in a first-level vibration state when both of the following conditions are met simultaneously:

[0100] The first offset displacement is greater than the first displacement threshold;

[0101] The first vibration acceleration is greater than the first acceleration threshold.

[0102] Among them, the offset displacement reflects the degree to which the impeller's center of mass deviates from the ideal rotation axis. It is mainly caused by the non-uniform accumulation of oil on the blade surface and belongs to the low-frequency, steady-state unbalance quantity characterization. The vibration acceleration reflects the intensity of the dynamic load on the range hood structure. It is closely related to centrifugal force fluctuation and resonance tendency and reflects the high-frequency energy release level.

[0103] Only when both the offset displacement and vibration acceleration are greater than the threshold can it be considered that there is a real and continuous dynamic balance disruption, rather than a momentary disturbance.

[0104] The vibration indicates that localized grease buildup has begun on the impeller surface of the range hood, but it is not yet severely unbalanced. The vibration is in a controllable initial stage, triggering the first-level compensation strategy, such as reducing the motor speed to the first target speed (e.g., 80% of the rated speed) to slow the vibration growth while maintaining smoke extraction performance.

[0105] One possible implementation is to set the first displacement threshold to 0.8 mm; and the first acceleration threshold to: If the first vibration displacement is greater than 0.8 mm and the first vibration acceleration is greater than... If so, it is determined that the motor is currently in the first level of vibration.

[0106] S205. Control the speed of the range hood motor to reduce it to the first target speed corresponding to the first level of vibration.

[0107] Specifically, once the range hood motor is determined to be in a first-level vibration state, a graded speed compensation strategy is immediately activated, executing the control action of "reducing the motor speed to the first target speed corresponding to the first-level vibration," rather than simply and rudely cutting off the power.

[0108] The first target rotational speed was not arbitrarily selected, but determined after comprehensively considering the effectiveness of vibration suppression, smoke extraction performance, and user comfort.

[0109] One possible implementation is to smoothly reduce the motor speed of the range hood to 100 rpm when the motor is currently experiencing Level 1 vibration, in order to reduce vibration.

[0110] S206. Obtain the second offset displacement and the second vibration acceleration of the range hood motor.

[0111] S207. If the second offset displacement is greater than the second displacement threshold and the second vibration acceleration is greater than the second acceleration threshold, the motor is determined to be in a second-order vibration state.

[0112] S208. Control the speed of the range hood motor to reduce it to the second target speed corresponding to the second-level vibration.

[0113] In particular, after the range hood motor has already implemented its first speed reduction due to first-level vibration, vibration status data is continuously or periodically collected again to assess whether the current speed adjustment measures are effective and whether further speed adjustments are needed.

[0114] One possible implementation involves determining the second offset displacement and second vibration acceleration of the range hood motor after the motor speed has been adjusted to the first target speed and has been running stably for a preset time. The second offset displacement and second vibration acceleration are then compared with preset second displacement thresholds and second acceleration thresholds, respectively. If both the second offset displacement and the second vibration acceleration are greater than the second displacement threshold, the motor is determined to be currently in a second-level vibration state.

[0115] Among them, the first displacement threshold is greater than the second displacement threshold, the first acceleration threshold is greater than the second acceleration threshold, and the first target rotation speed is higher than the second target rotation speed.

[0116] Theoretically, vibration should decrease significantly after the rotation speed is reduced. If it does not decrease or even worsens, it indicates a higher level of fault. Specifically, if the second offset displacement is greater than the second displacement threshold and the second vibration acceleration is greater than the second acceleration threshold after the rotation speed has been reduced to the first target speed, it indicates that the oil accumulation may no longer be uniform, the blade imbalance problem is more serious, and the range hood may have mechanical damage.

[0117] Once it is confirmed that the motor is currently experiencing level two vibration, a higher level of protection strategy will be immediately implemented, further reducing the motor speed to the second target speed. This aims to minimize mechanical damage while ensuring the user's basic operational needs are met.

[0118] One possible implementation is to set the second displacement threshold to 0.5 mm; and the second acceleration threshold to: Specifically, when the second offset displacement > 0.5 mm and the second vibration acceleration > If so, it is determined that the motor is currently in a second-order vibration state.

[0119] One possible implementation is to smoothly reduce the motor speed of the range hood to 50 rpm when the motor is currently experiencing level two vibration, in order to reduce vibration.

[0120] S209. If the second offset displacement is not greater than the second displacement threshold and the second vibration acceleration is not greater than the second acceleration threshold, control the range hood motor to maintain the current speed.

[0121] Once the range hood has completed the first-level vibration intervention, that is, the motor speed has been reduced to the first target speed, the vibration signal is re-acquired and processed to obtain the key parameters for secondary evaluation: the second offset displacement and the second vibration acceleration.

[0122] One possible implementation is to compare the second offset displacement and the second vibration acceleration with the second displacement threshold and the second vibration acceleration, respectively. If the second offset displacement does not exceed the second displacement threshold and the second vibration acceleration does not exceed the second acceleration threshold, then it is determined that the current motor operating state is within a stable and controllable range, and there is no need to activate higher-level speed reduction protection measures. The current motor speed is maintained unchanged to avoid excessive speed reduction affecting the normal smoke exhaust effect of the range hood.

[0123] This embodiment provides a control method for a range hood. The method collects the original vibration acceleration of the range hood motor using an accelerometer and calculates the original offset displacement based on the original vibration acceleration. The original offset displacement and original vibration acceleration are then denoised to obtain a first offset displacement and a first vibration acceleration for judgment. When both the offset displacement and the first vibration acceleration simultaneously exceed the corresponding first-level threshold, it is determined to be a first-level vibration, and the motor speed is reduced to a first target speed. Monitoring continues for a second offset displacement and a second vibration acceleration. If both simultaneously exceed a lower second-level threshold, the range hood motor is determined to have a more severe second-level vibration, and the motor speed is further reduced to a lower second target speed. This graded judgment and progressive speed adjustment strategy effectively suppresses vibration deterioration, avoids noise generation, and reduces the risk of structural loosening or component detachment caused by vibration.

[0124] Figure 3 A flowchart illustrating a control method for a range hood provided in this application embodiment. Figure 3 .like Figure 3 As shown, in Figure 1 Based on the embodiments, the control method of the range hood is described in detail, including:

[0125] S301. Obtain historical operating data of the range hood, including historical offset displacement, historical vibration acceleration, and historical rotational speed.

[0126] S302. Based on historical operating data, adaptively determine a first displacement threshold and a first acceleration threshold, and / or a second displacement threshold and a second acceleration threshold.

[0127] To improve the accuracy and adaptability of vibration level determination, an adaptive threshold setting mechanism based on historical operating data is introduced. This mechanism can dynamically adjust the first displacement threshold, the first acceleration threshold, the second displacement threshold, and the second acceleration threshold, making the vibration determination more consistent with the actual health status and operating environment of the current equipment.

[0128] One possible implementation is to continuously acquire the following historical operating data through the main control unit built into the range hood:

[0129] Historical offset sequence: the offset values ​​after noise reduction in each running cycle;

[0130] Historical vibration acceleration sequence: noise-reduced vibration acceleration values ​​for each operating cycle;

[0131] Historical speed sequence: The actual speed of the motor in each operating cycle.

[0132] Periodically (e.g., upon first power-on each day) or under specific conditions (e.g., when a vibration trend is detected), new thresholds are dynamically calculated based on historical offset displacement, historical vibration acceleration, and historical rotational speed. Through this adaptive threshold mechanism based on historical operating data, personalized judgment criteria are established according to the wear and oil contamination characteristics of the device itself.

[0133] S303. Based on historical operating data, a time series analysis algorithm is used to predict the trend of displacement and vibration acceleration changes within a preset time period in the future.

[0134] S304. When the trend indicates that the offset displacement or vibration acceleration will exceed the first displacement threshold and the first acceleration threshold, or the second displacement threshold and the second acceleration threshold, in the future preset period, the rotational speed adjustment strategy is executed in advance to suppress the aggravation of the actual vibration.

[0135] One possible implementation involves continuously collecting historical displacement sequences, historical vibration acceleration sequences, historical rotational speed sequences, timestamps, operating modes, and cumulative runtime as inputs to the prediction model. A time series analysis algorithm then performs data analysis and prediction on the historical displacement sequences, historical vibration acceleration sequences, and historical rotational speed sequences to obtain the trends in displacement and vibration acceleration changes within a preset future time period.

[0136] The range hood motor is deemed to have a potential over-limit risk if any of the following conditions are met:

[0137] If the offset displacement within a preset time period is greater than the first displacement threshold and the vibration acceleration within a preset time period is greater than the first acceleration threshold, then the range hood motor will be determined to enter the first level of vibration.

[0138] If the offset displacement within a preset time period is greater than the second displacement threshold and the vibration acceleration within a preset time period is greater than the second acceleration threshold, then the range hood motor will be determined to enter the second-level vibration stage.

[0139] One possible approach is to immediately intervene in speed control once a predicted trend indicates that the speed will exceed limits. Specifically, this involves preemptively reducing the motor speed to the target speed corresponding to the current operating state. For example, if it is predicted that the motor will enter level one vibration, the motor speed would be reduced to the first target speed corresponding to level one vibration in advance.

[0140] During the adjustment of motor speed, not only is responsive control based on the current vibration state implemented, but a predictive maintenance mechanism based on time series analysis is also introduced, achieving a leap from "passive speed reduction" to "active intervention." By analyzing historical operating data, the changing trends of offset displacement and vibration acceleration within a preset time period are predicted, and speed adjustment is performed in advance before actual over-limit occurrence, thereby effectively suppressing vibration deterioration.

[0141] This embodiment provides a control method for a range hood. Based on the range hood's historical operating data, including historical displacement, vibration acceleration, and rotational speed, this method adaptively sets primary and secondary vibration judgment thresholds and uses a time series analysis algorithm to predict the vibration development trend in the short term. When the prediction indicates that the displacement or vibration acceleration is about to exceed the corresponding threshold, the method proactively adjusts the motor speed in advance, thereby intervening before the vibration actually intensifies and achieving predictive vibration suppression. By combining adaptive threshold setting and vibration trend prediction, accurate identification and proactive suppression of range hood vibration are achieved.

[0142] Figure 4 This is a schematic diagram of the control device for a range hood provided in this application. Figure 4 As shown, this application provides a control device for a range hood, the control device 400 of which includes:

[0143] The acquisition module 401 is used to acquire the first offset displacement and the first vibration acceleration of the range hood motor;

[0144] The determining module 402 is used to determine the vibration level of the motor based on the first offset displacement and the first vibration acceleration;

[0145] The processing module 403 is used to adjust the speed of the range hood motor according to the vibration level.

[0146] Optionally, the determining module 402 is further configured to determine that the motor is in first-order vibration when the first offset displacement is greater than the first displacement threshold and the first vibration acceleration is greater than the first acceleration threshold.

[0147] The processing module 403 is also used to control the speed of the range hood motor to decrease to the first target speed corresponding to the first level of vibration.

[0148] Optionally, the acquisition module 401 is also used to acquire the second offset displacement and the second vibration acceleration of the range hood motor;

[0149] The determination module 402 is also used to determine that the motor is in a second-level vibration when the second offset displacement is greater than the second displacement threshold and the second vibration acceleration is greater than the second acceleration threshold.

[0150] The processing module 403 is also used to control the speed of the range hood motor to decrease to the second target speed corresponding to the second-level vibration; wherein, the first displacement threshold is greater than the second displacement threshold, the first acceleration threshold is greater than the second acceleration threshold, and the first target speed is higher than the second target speed.

[0151] Optionally, the processing module 403 is also used to control the range hood motor to maintain the current speed when the second offset displacement is not greater than the second displacement threshold and the second vibration acceleration is not greater than the second acceleration threshold.

[0152] Optionally, the acquisition module 401 is also used to acquire the raw vibration acceleration collected by the accelerometer;

[0153] The determination module 402 is also used to determine the original offset displacement based on the original vibration acceleration;

[0154] The processing module 403 is also used to perform noise reduction processing on the original offset displacement and the original vibration acceleration to obtain the first offset displacement and the first vibration acceleration.

[0155] Optionally, the acquisition module 401 is also used to acquire historical operating data of the range hood, including historical offset displacement, historical vibration acceleration, and historical rotational speed.

[0156] The determining module 402 is also used to adaptively determine a first displacement threshold and a first acceleration threshold, and / or a second displacement threshold and a second acceleration threshold based on historical operating data.

[0157] Optionally, the processing module 403 is also used to predict the trend of displacement and vibration acceleration changes in the future preset period based on historical operating data and time series analysis algorithms.

[0158] The processing module 403 is also used to execute a rotational speed adjustment strategy in advance to suppress the aggravation of actual vibration when the trend of change indicates that the offset displacement or vibration acceleration will exceed the first displacement threshold and the first acceleration threshold, or the second displacement threshold and the second acceleration threshold, within a preset period of time in the future.

[0159] The control device for the range hood provided in this application embodiment is similar in principle and technical effect to the implementation of each part of the aforementioned control method for the range hood, and will not be described again here.

[0160] Figure 5 This is a structural schematic diagram of a control device for a range hood provided in this application. Figure 5 As shown, this application provides a control device for a range hood. The control device 500 for the range hood includes: a receiver 501, a transmitter 502, a processor 503, and a memory 504.

[0161] Receiver 501 is used to receive instructions and data;

[0162] Transmitter 502 is used to send commands and data;

[0163] Memory 504 is used to store instructions executed by the computer;

[0164] The processor 503 is used to execute computer execution instructions stored in the memory 504 to implement the various steps of the range hood control method in the above embodiments. For details, please refer to the relevant descriptions in the foregoing embodiments of the range hood control method.

[0165] Optionally, the memory 504 can be either standalone or integrated with the processor 503.

[0166] When the memory 504 is set up independently, the electronic device also includes a bus for connecting the memory 504 and the processor 503.

[0167] The implementation principle and technical effects of the electronic device provided in this embodiment can be found in the foregoing embodiments, and will not be repeated here.

[0168] This application also provides a computer-readable storage medium storing computer-executable instructions, which, when executed by a processor, implement the method of any of the foregoing embodiments.

[0169] This application also provides a computer program product, including a computer program that, when executed by a processor, implements the method of any of the foregoing embodiments.

[0170] It should be noted that, for the sake of simplicity, the foregoing method embodiments are all described as a series of actions. However, those skilled in the art should understand that this application is not limited to the described order of actions, as some steps may be performed in other orders or simultaneously according to this application. Furthermore, those skilled in the art should also understand that the embodiments described in the specification are all optional embodiments, and the actions and modules involved are not necessarily essential to this application.

[0171] It should be further noted that although the steps in the flowchart are shown sequentially according to the arrows, these steps are not necessarily executed in the order indicated by the arrows. Unless explicitly stated herein, there is no strict order restriction on the execution of these steps, and they can be executed in other orders. Moreover, at least some steps in the flowchart may include multiple sub-steps or multiple stages. These sub-steps or stages are not necessarily completed at the same time, but can be executed at different times. The execution order of these sub-steps or stages is not necessarily sequential, but can be performed alternately or in turn with other steps or at least some of the sub-steps or stages of other steps.

[0172] It should be understood that the above-described device embodiments are merely illustrative, and the device of this application can also be implemented in other ways. For example, the division of units / modules in the above embodiments is only a logical functional division, and there may be other division methods in actual implementation. For example, multiple units, modules, or components may be combined, or integrated into another system, or some features may be ignored or not executed.

[0173] Furthermore, unless otherwise specified, the functional units / modules in the various embodiments of this application can be integrated into one unit / module, or each unit / module can exist physically separately, or two or more units / modules can be integrated together. The integrated units / modules described above can be implemented in hardware or in the form of software program modules.

[0174] In the above embodiments, the descriptions of each embodiment have their own emphasis. For parts not described in detail in a certain embodiment, please refer to the relevant descriptions of other embodiments. The technical features of the above embodiments can be combined arbitrarily. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as the combination of these technical features does not contradict each other, it should be considered within the scope of this specification.

[0175] Other embodiments of this application will readily occur to those skilled in the art upon consideration of the specification and practice of the invention disclosed herein. This application is intended to cover any variations, uses, or adaptations of this application that follow the general principles of this application and include common knowledge or customary techniques in the art not disclosed herein. The specification and examples are to be considered exemplary only, and the true scope and spirit of this application are indicated by the following claims.

[0176] It should be understood that this application is not limited to the precise structure described above and shown in the accompanying drawings, and various modifications and changes can be made without departing from its scope. The scope of this application is limited only by the appended claims.

Claims

1. A control method for a range hood, characterized in that, The method includes: Obtain the first offset displacement and the first vibration acceleration of the range hood motor; The vibration level of the motor is determined based on the first offset displacement and the first vibration acceleration. Adjust the speed of the range hood motor according to the vibration level; The acquisition of the first offset displacement and the first vibration acceleration of the range hood motor includes: Acquire the raw vibration acceleration collected by the accelerometer; Based on the original vibration acceleration, the original offset displacement is determined by numerical integration. The original offset displacement and the original vibration acceleration are denoised to obtain the first offset displacement and the first vibration acceleration; wherein, the first offset displacement represents the degree to which the impeller's center of mass deviates from the rotation axis.

2. The method according to claim 1, characterized in that, Determining the vibration level of the motor based on the first offset displacement and the first vibration acceleration includes: If the first offset displacement is greater than the first displacement threshold and the first vibration acceleration is greater than the first acceleration threshold, the motor is determined to be in first-order vibration. Adjusting the speed of the range hood motor according to the vibration level includes: The speed of the range hood motor is controlled to be reduced to the first target speed corresponding to the first level of vibration.

3. The method according to claim 2, characterized in that, After controlling the speed of the range hood motor to decrease to the first target speed corresponding to the first-level vibration, the method further includes: Obtain the second offset displacement and second vibration acceleration of the range hood motor; If the second offset displacement is greater than the second displacement threshold and the second vibration acceleration is greater than the second acceleration threshold, the motor is determined to be in a second-order vibration state. The speed of the range hood motor is controlled to decrease to the second target speed corresponding to the secondary vibration; wherein the first displacement threshold is greater than the second displacement threshold, the first acceleration threshold is greater than the second acceleration threshold, and the first target speed is higher than the second target speed.

4. The method according to claim 3, characterized in that, The method further includes: If the second offset displacement is not greater than the second displacement threshold and the second vibration acceleration is not greater than the second acceleration threshold, the range hood motor is controlled to maintain the current speed.

5. The method according to claim 4, characterized in that, The method further includes: Acquire the historical operating data of the range hood, including historical offset, historical vibration acceleration, and historical rotational speed; Based on the historical operating data, the first displacement threshold and the first acceleration threshold, and / or the second displacement threshold and the second acceleration threshold are adaptively determined.

6. The method according to claim 5, characterized in that, After adjusting the speed of the range hood motor according to the vibration level, the method further includes: Based on the historical operational data, a time series analysis algorithm is used to predict the trend of displacement and vibration acceleration changes within a future preset time period. When the trend of change indicates that the offset displacement or vibration acceleration will exceed the first displacement threshold and the first acceleration threshold, or the second displacement threshold and the second acceleration threshold, in the future within a preset period of time, the rotational speed adjustment strategy is executed in advance to suppress the aggravation of actual vibration.

7. A control device for a range hood, characterized in that, The device includes: The acquisition module is used to acquire the first offset displacement and the first vibration acceleration of the range hood motor; The determining module is used to determine the vibration level of the motor based on the first offset displacement and the first vibration acceleration; The processing module is used to adjust the speed of the range hood motor according to the vibration level; The acquisition module is specifically used to acquire the original vibration acceleration collected by the acceleration sensor; determine the original offset displacement by numerical integration based on the original vibration acceleration; and perform noise reduction processing on the original offset displacement and the original vibration acceleration to obtain the first offset displacement and the first vibration acceleration; wherein, the first offset displacement represents the degree to which the impeller's center of mass deviates from the rotation axis.

8. An electronic device, characterized in that, include: A processor, and a memory communicatively connected to the processor; The memory stores computer-executed instructions; The processor executes computer execution instructions stored in the memory to implement the method as described in any one of claims 1 to 6.

9. A computer-readable storage medium, characterized in that, The computer-readable storage medium stores computer-executable instructions, which, when executed by a processor, are used to implement the method as described in any one of claims 1 to 6.

10. A computer program product, characterized in that, Includes a computer program that, when executed by a processor, implements the method of any one of claims 1 to 6.

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