A range hood control method and a range hood system

Abstract

The present application relates to the technical field of range hood control, and particularly relates to a range hood control method and a range hood system, the method is applied to a control unit of a range hood system, the range hood comprises a volute and a flow guide assembly located below the volute, the flow guide assembly is connected with a driving assembly, the driving assembly is connected with the control unit; the method comprises the following steps: obtaining a current motor speed when the range hood is running; obtaining a target flow guide angle corresponding to the current motor speed based on a preset mapping relationship; controlling the driving assembly to run to drive the flow guide assembly to open and close to the target flow guide angle; obtaining a current pressure uniformity score of the flow guide assembly. The range hood control method provided in the present application quantifies the state of flue gas flow by introducing the current pressure uniformity score, and a relatively optimal target flow guide angle is maintained when the state of flue gas flow is relatively stable. In this way, the suction and exhaust efficiency can be optimized, and the operation noise can be effectively reduced.

Description

Technical Field

[0001] This invention relates to the field of tobacco appliance control technology, and in particular to a tobacco appliance control method and a tobacco appliance system. Background Technology

[0002] Currently, most range hoods on the market use fixed deflectors to optimize airflow. However, this design may not achieve the desired effect at different motor speeds, especially at high speeds, where not only is smoke extraction efficiency reduced, but significant noise problems may also occur.

[0003] Taking the V-shaped air deflector as an example, it may play a certain role in optimizing the cooking process at medium to high speeds (such as the high setting). However, when the motor speed is increased to higher stir-fry settings (such as above 2000 RPM), the original air deflector design may fail or even produce side effects. This will not only lead to the diffusion of oil fumes, reduced smoke extraction efficiency, and local airflow turbulence, but will also cause greater operating noise due to obstructed airflow, affecting the user's cooking experience. Summary of the Invention

[0004] In view of this, the purpose of the present invention is to provide a smoke exhaust control method and a smoke exhaust system to optimize smoke exhaust effect and reduce operating noise.

[0005] In a first aspect, embodiments of the present invention provide a range hood control method. This method is applied to a control unit of a range hood system. The range hood includes a volute and a flow guiding assembly located below the volute. The flow guiding assembly is connected to a drive assembly, and the drive assembly is connected to the control unit. The method includes: Get the current motor speed when the range hood is running; Based on the preset mapping relationship, obtain the target guide angle corresponding to the current motor speed; Control the operation of the drive component to drive the flow guiding component to open and close to the target flow guiding angle; Obtain the current pressure uniformity score of the flow guiding component; If the current pressure uniformity score is greater than the preset threshold, control the flow guiding component to maintain the target flow guiding angle.

[0006] In conjunction with the first aspect, multiple piezoelectric diaphragms are provided on the windward surface of the airflow guide assembly. The piezoelectric diaphragms are used to detect the pressure applied to the windward surface by the flowing wind force, and the multiple piezoelectric diaphragms are respectively connected to the control unit. The steps for obtaining the current pressure uniformity score of the flow guide component include: The pressure values ​​are obtained from the detection of each piezoelectric diaphragm; Calculate the current pressure uniformity score by combining all pressure values.

[0007] Combining the first aspect with all pressure values, the steps for calculating the current pressure uniformity score include: Calculate the average pressure by combining all pressure values ​​and the number of piezoelectric diaphragms; Calculate the standard deviation by combining all pressure values ​​and the average pressure value; Calculate the pressure uniformity score based on the standard deviation and the average pressure.

[0008] In conjunction with the first aspect, the steps for calculating the pressure uniformity score based on the standard deviation and average pressure include: Calculate using the following formula: ; in, Score for pressure uniformity. Standard deviation This represents the average pressure.

[0009] Following the first aspect, after obtaining the current pressure uniformity score of the flow guiding component, the method further includes: If the current pressure uniformity score is less than or equal to the preset threshold, obtain multiple preset motor speeds in calibration mode; For each motor speed, obtain the pressure deviation coefficient of the flow guide component when the motor speed is running; Determine whether the pressure deviation coefficient is less than the preset deviation coefficient threshold; If not, drive the flow guiding component to open and close until the pressure deviation coefficient is less than the preset deviation coefficient threshold, and record the current flow guiding angle; Update the preset mapping relationship between motor speed and guide angle based on the current guide angle.

[0010] In conjunction with the first aspect, after determining whether the pressure deviation coefficient is less than the preset deviation coefficient threshold; The current guide angle is determined to be the target guide angle corresponding to the motor speed.

[0011] In conjunction with the first aspect, the flow guiding assembly includes a first flow guiding plate and a second flow guiding plate arranged opposite to each other, both of which are rotatably connected to a fixed shaft; The steps of driving the flow guiding component to open and close until the pressure deviation coefficient is less than the preset deviation coefficient threshold and recording the current flow guiding angle include: Obtain the first pressure deviation coefficient corresponding to the first guide vane, and the second pressure deviation coefficient corresponding to the second guide vane; The target guide vane is determined based on the comparison relationship between the first pressure deviation coefficient, the second pressure deviation coefficient, and the deviation coefficient threshold. The target guide vane is driven to rotate relative to a fixed axis to adjust the guide angle.

[0012] Secondly, embodiments of this application also provide a smoke hood system, including a control unit. The smoke hood system further includes a volute and a flow guiding component located below the volute. The flow guiding component is connected to a drive component, and the drive component is connected to the control unit. The control unit is used to execute the method described above to control the drive component to drive the flow guiding component to adjust the flow field of the smoke flow below the volute. In conjunction with the second aspect, the traffic diversion components include: The first guide plate is rotatably connected to the fixed shaft, which is located below the volute inside the smoke machine; The second guide plate is arranged opposite to the first guide plate and is rotatably connected to the fixed shaft.

[0013] In conjunction with the second aspect, the system also includes a driver component, which includes: The first driving component is connected to the control unit and operates under the control of the control unit, driving the first guide plate to rotate. The second driving component is connected to the control unit and operates under the control of the control unit, driving the second guide vane to rotate.

[0014] The embodiments of the present invention bring the following beneficial effects: This application provides a range hood control method and a range hood system. The method is applied to the control unit of the range hood system. The range hood includes a volute and a flow guide component located below the volute. The flow guide component is connected to a drive component, and the drive component is connected to the control unit. The method includes: obtaining the current motor speed when the range hood is running; obtaining the target flow guide angle corresponding to the current motor speed based on a preset mapping relationship; controlling the drive component to run, so as to drive the flow guide component to open and close to the target flow guide angle; obtaining the current pressure uniformity score of the flow guide component; if the current pressure uniformity score is greater than a preset threshold, controlling the flow guide component to maintain the target flow guide angle.

[0015] The flue gas control method provided in this application quantifies the state of the flue gas flow by introducing a current pressure uniformity score. When the flue gas flow state is relatively stable, a better target guide angle is maintained. This not only optimizes the smoke extraction and exhaust efficiency but also effectively reduces operating noise.

[0016] Other features and advantages of the invention will be set forth in the description which follows, and will be apparent in part from the description, or may be learned by practicing the invention. The objects and other advantages of the invention are realized and obtained in accordance with the structures particularly pointed out in the description, claims and drawings.

[0017] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, preferred embodiments are described below in detail with reference to the accompanying drawings. Attached Figure Description

[0018] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0019] Figure 1 This is a schematic diagram of the structure of the smoke hood control method provided in an embodiment of the present invention; Figure 2 This is a schematic diagram showing the positional relationship between the airflow guiding component and the range hood provided in an embodiment of the present invention; Figure 3 This is a schematic diagram of the flow guiding component provided in an embodiment of the present invention; Figure 4 This is an exploded structural diagram of the flow guiding component provided in an embodiment of the present invention; Figure 5 This is a schematic diagram of signal transmission in a smoke hood system provided in an embodiment of the present invention; Figure 6 This is a schematic diagram of the electronic device structure provided in an embodiment of the present invention.

[0020] Figure label: 1-Smoke hood, 11-Smoke collection chamber; 2-Flow guiding assembly, 21-Fixed shaft, 211-Stepper motor, 22-First flow guiding plate, 23-Second flow guiding plate, 24-First interface, 25-Rotating buckle, 26-Female buckle, 27-Piezoelectric diaphragm, 28-Wire hole, 29-Second interface; 3-Swirl shell; 4-Limiting component, 41-Groove; 130 - Processor, 131 - Memory, 132 - Bus, 133 - Communication interface. Detailed Implementation

[0021] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0022] To facilitate understanding of this embodiment, the technical terms used in this application will be briefly introduced below.

[0023] Understandably, as the core equipment for kitchen fume treatment, the composition and function of the range hood are crucial. Figure 2As shown, the structure of a smoke hood typically includes the following main parts: smoke collection chamber 11, volute 3, flow guiding assembly 2, oil screen (not shown in the figure), motor (not shown in the figure), and impeller (not shown in the figure).

[0024] The smoke collection chamber 11 is used to collect cooking fumes in the kitchen.

[0025] The volute 3 is an important component inside the range hood 1. The volute 3 is a spiral cavity whose function is to guide the oil fumes discharged by the impeller to the air outlet to improve the smoke exhaust efficiency. It converts the power of the motor into wind power to drive the airflow, thereby realizing the smoke exhaust function.

[0026] The flow guide component 2 is located between the oil screen and the impeller. Its function is to guide the oil fumes to the impeller. Through reasonable flow guide design, the oil fume intake efficiency can be improved and the noise can be reduced.

[0027] The oil filter is located at the front end of the range hood 1 and is used to filter grease in the fumes. When the fumes pass through the oil filter, some of the grease will be intercepted and left on the oil filter, thereby reducing the amount of grease entering the range hood.

[0028] The motor is the power source for the range hood 1. By rotating, it drives the impeller to rotate, generating airflow.

[0029] The impeller is connected to the motor, and under the drive of the motor, it rotates at high speed to generate centrifugal force, which pushes the sucked-in oil fumes toward the volute 3.

[0030] After introducing the technical terms used in this application, the application scenarios and design concepts of the embodiments of this application will be briefly described below.

[0031] Most range hoods on the market currently use fixed baffles to optimize airflow, but their effectiveness is limited at different motor speeds. Especially at high speeds (such as above 2000 RPM), the baffles may fail, leading to the diffusion of cooking fumes, reduced smoke extraction efficiency, turbulent airflow, and increased operating noise, thus affecting the user experience.

[0032] Based on this, this application provides a method for controlling a range hood and a range hood system. The method is applied to the control unit of the range hood system. The range hood 1 includes a volute 3 and a flow guiding component 2 located below the volute 3. The flow guiding component 2 is connected to a drive component, and the drive component is connected to the control unit.

[0033] Example 1 This application provides a method for controlling a smoke hood, combined with... Figure 1 As shown, the method includes: S110, obtain the current motor speed when the range hood is running.

[0034] S120: Based on a preset mapping relationship, obtain the target guide angle corresponding to the current motor speed.

[0035] S130 controls the operation of the drive component to drive the flow guiding component to open and close to the target flow guiding angle.

[0036] S140, obtain the current pressure uniformity score of the flow guiding component.

[0037] S150, if the current pressure uniformity score is greater than the preset pressure uniformity score threshold, control the flow guiding component to maintain the target flow guiding angle.

[0038] In the embodiments of this application, the state of the flue gas flow is quantified by introducing a current pressure uniformity score. When the flue gas flow state is relatively stable, a better target guide angle is maintained. This not only optimizes the smoke extraction and exhaust efficiency but also effectively reduces operating noise.

[0039] Specifically, by establishing a mapping relationship between motor speed and airflow angle, and combining this with real-time pressure feedback, precise optimization of airflow under all operating conditions can be achieved. Simultaneously, based on the combination of pressure uniformity scoring and closed-loop control, the system can quickly respond to sudden changes in airflow (such as a surge in fumes during stir-frying). This approach ensures that the range hood maintains efficient smoke extraction performance under different operating conditions, while dynamically adjusting the airflow angle avoids additional noise caused by airflow turbulence, thus providing users with a quieter and more comfortable cooking environment.

[0040] Understandably, the control unit pre-stores a mapping relationship between the motor speed of the smoke hood 1 and the guiding angle of the guide component 2. This mapping relationship can be set during equipment manufacturing, or it can be the guiding angle that achieves the optimal smoke extraction effect at each motor speed determined after installation and debugging. In this way, after obtaining the current motor speed in step S110, the target guiding angle for the optimal smoke extraction effect corresponding to the current speed can be directly determined.

[0041] In this embodiment, the flow guiding component 2 is connected to the driving component, and the driving component is connected to the control unit. The control unit sends control commands to the driving component to control its operation, thereby driving the flow guiding component 2 to open and close. Adjusting the flow guiding angle of the flow guiding component 2 causes changes in the flow guiding angle and the flue gas flow field, thus improving exhaust efficiency. It is understood that the adjustment range of the flow guiding angle is limited. To achieve precise adjustment, in this embodiment, the driving component is a stepper motor or a servo motor to drive the flow guiding component 2 for precise adjustment.

[0042] Alternatively, a limiting component 4 can be provided to limit the flow guiding component 2 to obtain a more suitable flow guiding angle. As one feasible approach, the limiting component 4 may include a groove 41 formed on the flow guiding component 2 and a protrusion fixed to the inner wall of the smoke machine 1, such as... Figure 2As shown, a rotation limiting structure is formed to allow the flow guide component 2 to rotate within a specific angle range. Alternatively, the rotation angle can be limited by spring limiting (specifically, utilizing the elasticity of a spring, when the rotating component reaches a certain angle, the resistance generated by the spring will prevent the component from continuing to rotate), gear limiting (specifically, using an incomplete gear, i.e., a partial gear, to achieve rotation limiting; when the gear teeth have rotated through a certain angle, the gear will no longer be able to drive the driven component to rotate, thus achieving the limiting function), etc. The above-mentioned rotation limiting structures are all relatively common structures and will not be elaborated or limited here.

[0043] Combination Figure 2 As shown, the flow guiding component 2 is located inside the smoke machine 1 and below the volute 3. When the smoke machine 1 is running, the motor starts and drives the impeller to rotate, so as to draw the flue gas from the external environment into the smoke collection chamber 11 through the smoke inlet. Under the guiding effect of the flow guiding component 2, the flue gas flow field is adjusted so that the flue gas flow can smoothly enter the flue and be discharged.

[0044] In this embodiment, the guiding angle of the flow guiding component 2 can be adjusted. As one possible implementation, the flow guiding component 2 consists of a fixed guide plate and a rotatable guide plate. By driving the rotatable guide plate to rotate to adjust the guiding angle of the flow guiding component 2, the direction of the flue gas flow on the rotatable guide plate side can be adjusted independently, thereby adjusting the flue gas flow field. As another possible implementation, such as... Figure 3 , Figure 4 As shown in this embodiment, the flow guiding component includes a first flow guiding plate 22 and a second flow guiding plate 23 disposed opposite to each other. The first flow guiding plate 22 and the second flow guiding plate 23 are rotatably connected to a fixed shaft 21 disposed at the bottom. In this way, by driving the first flow guiding plate 22 and / or the second flow guiding plate 23, the flow guiding angle can be adjusted from both sides or one side, thereby realizing the adjustment of the flow direction of the flue gas entering from both sides or one side, thereby realizing flow field adjustment and improving flue gas discharge efficiency.

[0045] In conjunction with the first aspect, multiple piezoelectric diaphragms 27 are disposed on the windward surface of the airflow guiding assembly 2. The piezoelectric diaphragms 27 are used to detect the pressure exerted by the flowing air on the windward surfaces of the first airflow guiding plate 22 and the second airflow guiding plate 23. The multiple piezoelectric diaphragms 27 are respectively connected to the control unit. Step S140 includes: S141, obtain the pressure value of each piezoelectric diaphragm.

[0046] S142, combine all pressure values ​​to calculate the current pressure uniformity score.

[0047] In conjunction with the first aspect, step S142 includes: S1421, combine all pressure values ​​and the number of piezoelectric diaphragms to calculate the average pressure; S1422, combine all pressure values ​​and the average pressure value to calculate the standard deviation; S1423, calculate the pressure uniformity score based on the standard deviation and the average pressure.

[0048] In conjunction with the first aspect, step S1423 includes: Calculate using the following formula: ; in, Score for pressure uniformity. Standard deviation This represents the average pressure.

[0049] Understandably, multiple piezoelectric diaphragms 27 are provided on the windward side of the flow guide component 2. In order to improve the accuracy of pressure uniformity detection, the multiple piezoelectric diaphragms 27 should cover the entire surface of the windward side of the flow guide component to comprehensively detect the pressure applied to various points on the windward side.

[0050] As one feasible approach, multiple piezoelectric diaphragms 27 are distributed in a matrix; as another feasible approach, the windward surface of the flow guiding component 2 can be divided into regions, with multiple piezoelectric diaphragms 27 evenly distributed circumferentially outward from the center of each region. Both approaches are feasible and are not limited here. In this embodiment, multiple piezoelectric diaphragms 27 are distributed in a matrix to detect the pressure received at various points on the windward surface of the flow guiding component 2, converting the detected pressure distribution into an electrical signal to form a... Figure 4 The pressure cloud diagram shown represents the force exerted by the airflow on the windward surface of the guide component 2.

[0051] To evaluate the merits of the current flow guidance angle, it is necessary to calculate the uniformity of these pressure signals. Specifically, it is assumed that multiple piezoelectric diaphragms with a matrix distribution divide the windward side of the flow guidance assembly into... A grid is used, with each grid point (i.e., a piezoelectric diaphragm) recording a pressure value. Using... Indicates the first Line 1 The pressure value of the column. It is usually the pressure value after voltage signal conversion. The data of the entire matrix can then be represented as a two-dimensional array. :

[0052] in, , They are natural numbers greater than or equal to 1.

[0053] Next, step S1421 calculates the average pressure. :

[0054] Next, calculate the standard deviation. The pressure value at each point in the quantization matrix. With average pressure Degree of deviation:

[0055] Subsequently, based on standard deviation Average pressure Calculate the pressure uniformity score :

[0056] Understandable, pressure uniformity score A higher value indicates that the pressure across the windward surface of the guide component is more uniform and even, indicating an ideal guide angle, which is considered a superior guide angle. Maintaining this guide angle will allow for continued guide operation. The pressure uniformity score calculated using the above steps at the current moment is the current pressure uniformity score.

[0057] In conjunction with the first aspect, after step S150, the following also includes: S160, if the current pressure uniformity score is less than or equal to the preset threshold, obtain multiple preset motor speeds in calibration mode.

[0058] S170 obtains the pressure deviation coefficient of the flow guide component when the motor is running at each motor speed.

[0059] S180, determine whether the pressure deviation coefficient is less than the preset deviation coefficient threshold.

[0060] If not, proceed to steps S191-S192; if yes, proceed to step S193.

[0061] S191, drive the flow guiding component to open and close until the pressure deviation coefficient is less than the preset deviation coefficient threshold, and record the current flow guiding angle.

[0062] S192, based on the current guide angle, update the preset mapping relationship between motor speed and guide angle.

[0063] S193, determine the current guide angle as the target guide angle corresponding to the motor speed.

[0064] In this embodiment, if the uniformity of force on the windward surface of the flow guide component 2 is poor, it indicates that there is a deviation in the preset mapping relationship, and the current flow guide angle of the flow guide component 2 is not the optimal flow guide angle. In this case, it is necessary to redetermine the target flow guide angle corresponding to each motor speed in order to correct and update the mapping relationship.

[0065] Specifically, when the current pressure uniformity score is less than or equal to a preset threshold, a calibration mode is triggered, acquiring multiple preset motor speeds under calibration mode, i.e., acquiring the motor speeds at multiple operating speeds. To improve calibration accuracy, current operating parameters (such as flue resistance and ambient temperature) should be saved before switching to a preset standard test environment (e.g., through Lot linkage control or prompting the user to close doors and windows in the external environment). Then, starting with a preset minimum motor speed, the motor speed is gradually increased, and each motor speed is electrically stabilized for a preset duration (e.g., 30 seconds) to ensure stable airflow. For each motor speed, the guiding angle of the flow guide component 2 is adjusted until the corresponding deviation coefficient is less than a preset deviation coefficient threshold, thereby determining the optimal guiding angle for each motor speed and correcting and updating the preset mapping relationship.

[0066] For example, in calibration mode, multiple motor speeds are preset, divided into 10 uniform speed increments, with step sizes... Minimum speed (e.g.) Start by gradually increasing the speed to the maximum speed (e.g., First, control the motor to... Run the test and collect the pressure deviation coefficient of the flow guiding component at different flow guiding angles after 30 seconds. ,like This indicates a large pressure deviation. In this case, the flow guide component is driven to rotate to adjust the flow guide angle, and the flow angle is then measured again. ,like The flow guide assembly is driven to rotate again... until the pressure deviation coefficient is adjusted again after the flow guide angle of the flow guide assembly is adjusted. This indicates that the pressure deviation is within the preset range, and the motor speed is updated based on the current guide angle. The mapping relationship of the corresponding guide angle.

[0067] Then, with a preset step size (combined with the example above) Adjust the motor speed. Run the test and collect the pressure deviation coefficient of the flow guiding component at different flow guiding angles after 30 seconds. And adjust the guide angle using the above method until... To determine The optimal guiding angle at that time is determined to update the preset mapping relationship. According to the preset step size Repeat the above steps to determine the optimal guide angle at each motor speed and update the preset relationship.

[0068] The deviation coefficient is used to represent the uniformity of the pressure distribution. The smaller the value, the more uniform the pressure distribution, and the closer the angle of the deflector is to the optimal state. If Reaching the preset threshold If the value is 0.05 (e.g., 0.05), then the current guide angle can be considered ideal.

[0069] in, .

[0070] In conjunction with the first aspect, the flow guiding assembly 2 includes a first flow guiding plate 22 and a second flow guiding plate 23 arranged opposite to each other, both the first flow guiding plate 22 and the second flow guiding plate 23 being rotatably connected to the fixed shaft 21. Step S191 includes: S1911, obtain the first pressure deviation coefficient corresponding to the first guide vane and the second pressure deviation coefficient corresponding to the second guide vane.

[0071] S1912, the target guide vane is determined based on the comparison relationship between the first pressure deviation coefficient, the second pressure deviation coefficient and the deviation coefficient threshold.

[0072] S1913 drives the target guide vane to rotate relative to a fixed axis to adjust the guide angle.

[0073] In this embodiment, both the first guide plate 22 and the second guide plate 23 are rotatable, allowing adjustment of the flue gas flow field from two regions. This is achieved by calculating the pressure deviation coefficient of the flue gas flow on the first guide plate 22 and the pressure deviation coefficient of the flue gas flow on the second guide plate 23 in step S1911, and then comparing these coefficients with a deviation coefficient threshold. By comparing different sides, it can be determined which side requires flow angle adjustment, thus identifying the target flow deflector that needs to be rotated. Driving this target flow deflector to rotate then adjusts the flow angle on that side. In other words, selective adjustment is possible. Figure 2 Adjust the flow angle in the left and right sides of the middle area.

[0074] Secondly, this application provides a smoke hood system, which further includes a volute 3 and a flow guide component 2 located below the volute 3. The flow guide component 2 is connected to a drive component, and the drive component is connected to a control unit. The control unit 4 is used to execute the method described above to control the drive component to drive the flow guide component 2 to adjust the flow field of the smoke flow below the volute 3.

[0075] In conjunction with the second aspect, the flow guiding component 2 includes: a first flow guiding plate 22 and a second flow guiding plate 23.

[0076] The first guide plate 22 is rotatably connected to the fixed shaft 21, which is located below the volute 3 inside the smoke machine 1.

[0077] The second guide plate 23 is arranged opposite to the first guide plate 22 and is rotatably connected to the fixed shaft 21.

[0078] Understandably, in this embodiment, the bottom of the first guide plate 22 and the second guide plate 23 are respectively provided with rotating buckles 25. These rotating buckles 25 are rotatably connected to the female buckle 26 on the fixed shaft 21, allowing the first guide plate 22 and the second guide plate 23 to rotate relative to the fixed shaft 21. By rotating the first guide plate 22 and the second guide plate 23, the guiding angle can be adjusted, thereby adjusting the flow field, such as... Figure 2 , Figure 3 , Figure 4 As shown.

[0079] In conjunction with the second aspect, the system also includes a driving component; the driving component includes: a first driving element and a second driving element.

[0080] The first driving component is connected to the control unit and operates under the control of the control unit, driving the first guide plate 22 to rotate.

[0081] The second drive unit is connected to the control unit and operates under the control of the control unit, driving the second guide plate 23 to rotate.

[0082] In this embodiment, the driving assembly includes a first driving member and a second driving member respectively disposed at both ends of the fixed shaft 21. To precisely adjust the rotation of the first guide plate 22 and the second guide plate 23, the first driving member and the second driving member are stepper motors 211. The output ends of these two stepper motors 211 correspond one-to-one with the first interface 24 at the bottom of the first guide plate 22 and the second interface 29 at the bottom of the second guide plate 23, thereby driving the first guide plate 22 and the second guide plate 23 to rotate. Figure 3 , Figure 4 As shown.

[0083] Furthermore, piezoelectric diaphragms 27 are provided on the windward surfaces of the first guide plate 22 and the second guide plate 23. One end of the piezoelectric diaphragm 27 is connected to a circuit, and the other end of the circuit passes through a wire hole 28 on the fixed shaft 21 and connects to the control unit circuit located within the fixed shaft 21. Figure 5 As shown, the range hood system provided in this application collects the pressure of the flue gas flow at various points on the windward surface of the airflow guide component 2 through the piezoelectric diaphragm 27. The control unit adjusts the motor speed of the range hood or controls the operation of the drive component based on the collected pressure value to adjust the airflow guide angle of the airflow guide component 2, thereby ensuring that the range hood 1 can maintain efficient smoke extraction performance under different working conditions. At the same time, by dynamically adjusting the airflow guide angle, additional noise caused by airflow turbulence is avoided, thus providing users with a quieter and more comfortable cooking environment.

[0084] Thirdly, embodiments of this application provide an electronic device, combined with Figure 6As shown, the electronic device includes a memory 131 and a processor 130. The memory 131 stores a computer program, and the processor 130 runs the computer program to make the electronic device perform the above-described method.

[0085] Furthermore, combined Figure 6 The electronic device shown also includes a bus 132 and a communication interface 133, with the processor 130, the communication interface 133 and the memory 131 connected via the bus 132.

[0086] The memory 131 may include high-speed random access memory (RAM) and may also include non-volatile memory, such as at least one disk storage device. Communication between this system network element and at least one other network element is achieved through at least one communication interface 133 (which can be wired or wireless), such as the Internet, wide area network, local area network, metropolitan area network, etc. The bus 132 may be an ISA bus, PCI bus, or EISA bus, etc. The bus can be divided into address bus, data bus, control bus, etc. For ease of representation, Figure 6 The symbol is represented by a single double-headed arrow, but this does not mean that there is only one bus or one type of bus.

[0087] Processor 130 may be an integrated circuit chip with signal processing capabilities. In implementation, each step of the above method can be completed by the integrated logic circuitry in the hardware of processor 130 or by instructions in software form. Processor 130 may be a general-purpose processor, including a Central Processing Unit (CPU), a Network Processor (NP), etc.; it may also be a Digital Signal Processor (DSP), an Application Specific Integrated Circuit (ASIC), a Field-Programmable Gate Array (FPGA), or other programmable logic devices, discrete gate or transistor logic devices, or discrete hardware components. It can implement or execute the methods, steps, and logic block diagrams disclosed in the embodiments of this invention. The general-purpose processor may be a microprocessor or any conventional processor. The steps of the methods disclosed in the embodiments of this invention can be directly manifested as execution by a hardware decoding processor, or execution by a combination of hardware and software modules in the decoding processor. The software module can reside in a mature storage medium in the art, such as random access memory, flash memory, read-only memory, programmable read-only memory, electrically erasable programmable memory, or registers. This storage medium is located in memory 131, and processor 130 reads the information in memory 131 and, in conjunction with its hardware, completes the steps of the method described in the foregoing embodiments.

[0088] Fourthly, embodiments of this application provide a readable storage medium storing computer program instructions, which are read and executed by a processor to perform the above-described method.

[0089] Those skilled in the art will clearly understand that, for the sake of convenience and brevity, the specific working process of the system and apparatus described above can be referred to the corresponding process in the foregoing method embodiments, and will not be repeated here.

[0090] Furthermore, in the description of the embodiments of the present invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in the present invention based on the specific circumstances.

[0091] If a function is implemented as a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of this invention, or the part that contributes to the prior art, or a part of the technical solution, can be embodied in the form of a software product. This computer software product is stored in a storage medium and includes several instructions to cause a computer device (which may be a personal computer, server, or network device, etc.) to execute all or part of the steps of the methods of the various embodiments of this invention. The aforementioned storage medium includes various media capable of storing program code, such as USB flash drives, portable hard drives, read-only memory (ROM), random access memory (RAM), magnetic disks, or optical disks.

[0092] In the description of this invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing the invention and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0093] Finally, it should be noted that the above embodiments are merely specific implementations of the present invention, used to illustrate the technical solutions of the present invention, and not to limit it. The scope of protection of the present invention is not limited thereto. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that any person skilled in the art can still modify or easily conceive of changes to the technical solutions described in the foregoing embodiments within the technical scope disclosed in the present invention, or make equivalent substitutions for some of the technical features; and these modifications, changes, or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention, and should all be covered within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be determined by the scope of the claims.

Claims

1. A method for controlling a smoke hood, characterized in that, The method is applied to the control unit of a range hood system. The range hood includes a volute and a flow guiding assembly located below the volute. The flow guiding assembly is connected to a drive assembly, and the drive assembly is connected to the control unit. Multiple piezoelectric diaphragms are disposed on the windward surface of the flow guiding assembly. The piezoelectric diaphragms are used to detect the pressure exerted by the flowing air on the windward surface, and each of the piezoelectric diaphragms is connected to the control unit. The method includes: Get the current motor speed when the range hood is running; Based on a preset mapping relationship, the target guide angle corresponding to the current motor speed is obtained; Control the operation of the drive component to drive the flow guiding component to open and close to the target flow guiding angle; Obtain the current pressure uniformity score of the flow guiding component; If the current pressure uniformity score is greater than a preset threshold, the flow guiding component is controlled to maintain the target flow guiding angle. The step of obtaining the current pressure uniformity score of the flow guiding component includes: The pressure values ​​of each of the piezoelectric diaphragms are obtained by detection. Calculate the average pressure by combining all the pressure values ​​and the number of piezoelectric diaphragms; Calculate the standard deviation by combining all the pressure values ​​and the average pressure value; The pressure uniformity score is calculated based on the standard deviation and the average pressure using the following formula; ； in, Score for pressure uniformity. The standard deviation is... The average pressure value is denoted as .

2. The method according to claim 1, characterized in that, After obtaining the current pressure uniformity score of the flow guiding component, the method further includes: If the current pressure uniformity score is less than or equal to the preset threshold, obtain multiple preset motor speeds in the calibration mode; For each motor speed, obtain the pressure deviation coefficient of the flow guiding component when the motor is running at the motor speed; Determine whether the pressure deviation coefficient is less than a preset deviation coefficient threshold; If not, drive the flow guiding component to open and close until the pressure deviation coefficient is less than the preset deviation coefficient threshold, and record the current flow guiding angle; Based on the current flow guide angle, update the preset mapping relationship between the motor speed and the flow guide angle.

3. The method according to claim 2, characterized in that, After determining whether the pressure deviation coefficient is less than the preset deviation coefficient threshold, the current guide angle is determined to be the target guide angle corresponding to the motor speed.

4. The method according to claim 2, characterized in that, The flow guiding assembly includes a first flow guiding plate and a second flow guiding plate arranged opposite to each other, and both the first flow guiding plate and the second flow guiding plate are rotatably connected to a fixed shaft; The steps of driving the flow guiding component to open and close until the pressure deviation coefficient is less than a preset deviation coefficient threshold and recording the current flow guiding angle include: Obtain the first pressure deviation coefficient corresponding to the first guide plate and the second pressure deviation coefficient corresponding to the second guide plate; The target guide vane is determined based on the comparison relationship between the first pressure deviation coefficient, the second pressure deviation coefficient, and the deviation coefficient threshold. The target guide plate is driven to rotate relative to the fixed axis to adjust the guide angle.

5. A range hood system, characterized in that, The system includes a control unit, and further includes a volute and a flow guiding component located below the volute. The flow guiding component is connected to a drive component, and the drive component is connected to the control unit. The control unit is used to perform the method as described in any one of claims 1-4 to control the drive component to operate and drive the flow guiding component to adjust the flow field of the flue gas below the volute.

6. The system according to claim 5, characterized in that, The diversion components include: The first guide plate is rotatably connected to a fixed shaft, which is located below the volute inside the smoke machine; The second guide plate is disposed opposite to the first guide plate and is rotatably connected to the fixed shaft.

7. The system according to claim 6, characterized in that, The system also includes a driver component, which includes: A first driving component is connected to the control unit and operates under the control of the control unit, driving the first guide plate to rotate. The second driving component is connected to the control unit and operates under the control of the control unit, driving the second guide plate to rotate.

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