A range hood and a method and device for controlling operation thereof

Abstract

The application discloses a range hood and a running control method and device thereof. First, current scene information set for the range hood and air duct blockage data of an environment where the range hood is currently located are acquired. After the air duct blockage data of the range hood is acquired, the target effective air volume required by the range hood under the current scene information can be determined, and the target rotating speed of the fan is determined according to the actual effective air volume. Further, the fan is controlled to run at the target rotating speed, so that the rotating speed required by the fan under the scene can be dynamically adjusted according to the blockage degree of the range hood, the target effective air volume under the scene is accurately provided, and the effective air volume of the range hood under different air duct blockage conditions is constant. Therefore, while the oil smoke suction effect is ensured, noise and energy consumption caused by the range hood providing redundant air volume are reduced.

Description

Technical Field

[0001] This invention belongs to the field of home appliance technology, and in particular relates to a range hood and its operation control method and device. Background Technology

[0002] Because the actual installation environment of range hoods is quite complex and the operating conditions during use are also quite varied, the actual smoke extraction effect of range hoods varies. If the smoke extraction volume provided by the range hood is too high, it will result in high noise; if the smoke extraction volume is too low, it will not achieve the required smoke extraction effect under actual operating conditions. Summary of the Invention

[0003] The present invention aims to solve, at least to a certain extent, the technical problems of high noise and high energy consumption of range hoods, and provides a range hood and its operation control method and device.

[0004] In a first aspect, embodiments of the present invention provide a method for controlling the operation of a range hood, comprising: acquiring current scene information set for the range hood; acquiring duct blockage data of the current environment of the range hood, and determining a target effective air volume corresponding to the current scene information based on the duct blockage data; determining a target rotational speed required for the fan of the range hood to provide the target effective air volume, and controlling the fan to operate at the target rotational speed to provide the target effective air volume.

[0005] After obtaining the duct blockage data of the range hood, this embodiment of the invention can determine the target effective air volume required by the range hood under the current scenario information, and determine the target speed of the fan based on the actual effective air volume. Furthermore, by controlling the fan to run at the target speed, the required speed of the fan under the scenario can be dynamically adjusted according to the degree of blockage of the range hood, so as to accurately provide the target effective air volume under the scenario. This ensures that the effective air volume of the range hood remains constant under different duct blockage conditions. Therefore, while ensuring the fume extraction effect, it reduces the noise and energy consumption caused by the range hood providing excess air volume.

[0006] In some implementations, the duct blockage data includes an actual damper value characterizing the current degree of blockage of the range hood. Obtaining the current duct blockage data of the range hood includes: obtaining first electrical parameter information of the fan during operation; obtaining first duct reference information corresponding to the first electrical parameter information from pre-constructed duct basic data; and performing interpolation processing based on the first duct reference information and the first electrical parameter information to obtain the actual damper value characterizing the current degree of blockage of the range hood.

[0007] In some implementations, determining the target rotational speed required for the range hood fan to provide the target effective airflow includes: obtaining second duct reference information corresponding to the target effective airflow from pre-constructed duct base data; and performing interpolation processing based on the second duct reference information and the target effective airflow to obtain the target rotational speed.

[0008] In some implementations, controlling the fan to operate at the target speed to provide the target effective air volume includes: determining whether the target speed is within a corresponding preset boundary range; if so, controlling the fan to operate at the target speed to provide the target effective air volume.

[0009] By verifying the target speed within a preset boundary range, errors in the calculation of the target speed are avoided, thereby ensuring the accuracy of the target speed and improving the reliability of the range hood's operation control process.

[0010] In some implementations, after determining whether the target rotational speed is within a preset boundary range, the method further includes: if the target rotational speed is not within the preset boundary range, determining a target rotational speed threshold based on the preset boundary range; updating the target rotational speed based on the target rotational speed threshold; and controlling the fan to operate at the updated target rotational speed.

[0011] In the event of an error in the target speed calculation, the target speed is updated to correct it, thereby improving the reliability of the range hood's operation control process.

[0012] In some implementations, after controlling the fan to operate at the updated target speed, the method further includes: updating the target effective air volume corresponding to the current scene information based on the updated target speed.

[0013] The system updates the target effective air volume if it is incorrect in the current scene information, so that it can directly provide the correct target effective air volume for the next control process. This avoids the process of determining the target speed based on the incorrect target effective air volume, thereby improving the speed and accuracy of determining the target speed.

[0014] In some implementations, determining the target effective airflow corresponding to the current scene information based on the duct blockage data includes: determining whether the duct blockage data is within a preset duct blockage data range; if so, determining the target effective airflow corresponding to the current scene information based on the duct blockage data.

[0015] This invention utilizes the range of air duct blockage data to verify the air duct blockage data, thereby preventing the range hood from still operating under abnormal air duct conditions and improving the reliability of range hood operation control.

[0016] In some implementations, after controlling the fan to operate at the target speed, the method further includes: acquiring second electrical parameter information during the operation of the fan at the target speed; determining the target damper value and actual effective airflow of the range hood under the second electrical parameter information; determining whether the target damper value and actual effective airflow are consistent with pre-constructed ductwork basic data; if not, re-executing the following steps: acquiring ductwork blockage data of the current environment of the range hood, determining the target effective airflow corresponding to the current scene information based on the ductwork blockage data, and determining the target speed required for the range hood fan to provide the target effective airflow. This implementation effectively ensures that the range hood can operate with a constant airflow.

[0017] Secondly, embodiments of the present invention provide a range hood operation control device, comprising: a data acquisition unit, configured to acquire current scene information set for the range hood; acquire duct blockage data of the current environment where the range hood is located; an effective air volume determination unit, configured to determine the target effective air volume corresponding to the current scene information based on the duct blockage data; and a fan control unit, configured to determine the target rotation speed required for the fan of the range hood to provide the target effective air volume, and control the fan to operate at the target rotation speed to provide the target effective air volume.

[0018] After obtaining the duct blockage data of the range hood, this embodiment of the invention can determine the target effective air volume required by the range hood under the current scenario information, and determine the target speed of the fan based on the actual effective air volume. Furthermore, by controlling the fan to run at the target speed, the required speed of the fan under the scenario can be dynamically adjusted according to the degree of blockage of the range hood, so as to accurately provide the target effective air volume under the scenario. This ensures that the effective air volume of the range hood remains constant under different duct blockage conditions. Therefore, while ensuring the fume extraction effect, it reduces the noise and energy consumption caused by the range hood providing excess air volume.

[0019] Thirdly, embodiments of the present invention provide a range hood, including a memory, a processor, and a program stored in the memory and executable on the processor, wherein the processor executes the program to implement the method described in any of the embodiments of the first aspect.

[0020] The one or more technical solutions provided in the embodiments of the present invention achieve at least the following technical effects or advantages:

[0021] After obtaining the duct blockage data of the range hood, the target effective air volume required by the range hood under the current scenario can be determined. Based on the actual effective air volume, the target speed of the fan can be determined. Furthermore, by controlling the fan to run at the target speed, the required speed of the fan under the scenario can be dynamically adjusted according to the degree of blockage of the range hood, so as to accurately provide the target effective air volume under the scenario. This ensures that the effective air volume of the range hood remains constant under different duct blockage conditions. Therefore, while ensuring the fume extraction effect, the noise and energy consumption caused by the range hood providing excess air volume are reduced. Attached Figure Description

[0022] To more clearly illustrate the technical solutions in the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0023] Figure 1 A flowchart of the range hood operation control method in an embodiment of the present invention is shown;

[0024] Figure 2 This illustrates one embodiment of the range hood operation control method according to an example of the present invention;

[0025] Figure 3 This diagram illustrates the "airflow-pressure" performance of the fan control system under different duct blockage data in an embodiment of the present invention.

[0026] Figure 4 This illustration shows a schematic diagram of the "air volume-air pressure" control of the fan under different scenario information in an embodiment of the present invention;

[0027] Figure 5 This diagram illustrates the functional block diagram of the range hood operation control device in an embodiment of the present invention.

[0028] Figure 6 A schematic diagram of the structure of a range hood in an embodiment of the present invention is shown. Detailed Implementation

[0029] Given that related technologies cannot reduce the noise and energy consumption of range hoods while ensuring the effectiveness of fume extraction, embodiments of the present invention provide a range hood and its operation control method and device, which can determine the target speed for controlling the range hood fan based on the target effective air volume.

[0030] To make the objectives, technical solutions, and advantages of this invention clearer, the technical solutions of the embodiments of this invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this invention, and not all of them. Based on the embodiments of this invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this invention.

[0031] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this invention are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of the invention described herein can be implemented in orders other than those illustrated or described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover a non-exclusive inclusion; for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.

[0032] The range hood operation control method provided by the present invention will now be described in detail with reference to the accompanying drawings and specific embodiments.

[0033] Because problems such as blocked air ducts and disconnected air ducts and dampers can occur after installation, affecting the smoke extraction and exhaust efficiency of range hoods, this invention provides a range hood operation control method to reduce noise and energy consumption while ensuring effective smoke extraction. Please refer to... Figure 1 As shown, the range hood operation control method provided in this embodiment of the invention includes the following steps:

[0034] Step S101: Obtain the current scene information set for the range hood.

[0035] In some implementations, the current scene information can be generated by the range hood based on a pre-set program or by a user's selection triggered by the human-computer interaction interface of the range hood.

[0036] Unlike the implementation described above, the current scene information can also be generated by an external terminal device, such as a terminal device with a range hood control app or mini-program installed. This terminal device can be a smartphone, computer, etc. The terminal device generates the current scene information based on the user's selected action and sends it to the range hood via the communication link established between the terminal device and the range hood. The range hood responds to the current scene information received from the external device.

[0037] It can also generate current scene information for the range hood according to the preset usage scenarios during the normal use of the range hood, or determine the current scene information by automatically detecting the current cooking method each time the range hood fan is turned on.

[0038] It's understandable that the current scenario information could be the set range hood speed setting. Each speed setting corresponds to a specific target effective airflow, and these target effective airflows differ for each setting. Furthermore, the target effective airflow remains unchanged regardless of the air resistance at that speed setting. For example, the target effective airflow for the first speed setting might be 8 cubic meters per minute, the second speed setting might be 10 cubic meters per minute, and the third speed setting might be 12 cubic meters per minute.

[0039] Unlike the methods mentioned above, the current scenario information can also be the set cooking method, where each cooking method corresponds to a target effective airflow. For example, if a user is cooking three dishes with different cooking methods, the target effective airflow for steamed durian could be 4.6 cubic meters per minute, the target effective airflow for durian-wrapped chicken legs could be 8 cubic meters per minute, and the target effective airflow for fried durian pastries could be 10 cubic meters per minute.

[0040] Step S102: Obtain the duct blockage data of the current environment of the range hood, and determine the target effective air volume corresponding to the current scene information based on the duct blockage data.

[0041] In this embodiment of the invention, the duct blockage data includes the actual damper value, which characterizes the current degree of blockage of the range hood. Specifically, to obtain the current duct blockage data of the range hood, the first electrical parameter information of the fan during operation can be obtained first; then, the first duct reference information corresponding to the first electrical parameter information can be obtained from the pre-constructed duct basic data; finally, interpolation processing is performed based on the first duct reference information and the first electrical parameter information to obtain the actual damper value, which characterizes the current degree of blockage of the range hood.

[0042] Specifically, the first air duct reference information corresponding to the first electrical parameter information is obtained, and interpolation processing is performed based on the first air duct reference information and the first electrical parameter information to obtain the actual damper value of the range hood.

[0043] In this embodiment of the invention, obtaining the first duct reference information corresponding to the first electrical parameter information includes: obtaining the first reference rotational speed data corresponding to the current rotational speed and the reference damper data corresponding to the current operating current from the duct basic data.

[0044] Specifically, in the basic data of the air duct, multiple reference speeds, as well as the reference current, target effective air volume, and reference damper value corresponding to each reference speed, can be stored in the form of a data table.

[0045] Specifically, the fan operates at various reference speeds within each simulated air duct, and data is collected. Specifically, the operating current and air duct information corresponding to each reference speed are collected. The collected air duct information includes one or more of the following: target effective airflow, air pressure, air volume, etc. Data analysis is performed based on each reference speed and its corresponding operating current and air duct information to determine the reference current, target effective airflow, and reference damper value for each reference speed, thereby establishing the basic air duct data. Each reference speed corresponds to a specific reference current, target effective airflow, and reference damper value.

[0046] Specifically, the reference data table format in the basic data of the air duct can be shown in Table 1 below:

[0047] Table 1. Reference Data Table

[0048]

[0049] It should be noted that Table 1 above is only an example of the format of basic duct data. Basic duct data can also be represented in other tabular formats. In this case, the reference damper value represents the degree of blockage in the range hood's duct.

[0050] Specifically, the duct resistance can be expressed based on calculations of airflow and air pressure. Alternatively, it can be expressed as a percentage of the duct's blockage level, where 100% represents complete blockage, and a higher percentage indicates more severe blockage; conversely, a lower percentage indicates less blockage.

[0051] The first electrical parameter information comes from feedback from the wind turbine. After the wind turbine starts running, it will provide real-time feedback on the speed and current during operation. The first electrical parameter information fed back by the wind turbine includes: the wind turbine's first stable speed and the wind turbine's first stable current.

[0052] In one implementation, to obtain the first stable speed and the first stable current of the fan, the following methods can be used: monitor the speed and current of the fan during operation; if the speed of the fan during operation is found to meet the first stability condition, obtain the current speed of the fan and record it as the first stable speed of the fan. If the current of the fan during operation is found to meet the second stability condition, obtain the current operating current of the fan and record it as the first stable current of the fan.

[0053] Understandably, the first stability condition can be set as follows: the change in fan speed is less than a first preset value. The second stability condition can be set as follows: the change in fan current is less than a second preset value.

[0054] Unlike the above implementation method, in order to obtain the first stable speed and the first stable current of the fan, the following implementation method can also be adopted: monitor the running time of the fan, and when the running time of the fan reaches the first preset time, collect the current speed of the fan and record it as the first stable speed of the fan; when the running time of the fan reaches the second preset time, collect the current operating current of the fan and record it as the first stable current of the fan.

[0055] It is understood that the first preset duration is greater than or equal to the interval from fan startup to reaching the first stable speed. The second preset duration is also greater than or equal to the interval from fan startup to current stabilization. The first and second preset durations can be set to the same duration. The specific values ​​of the first and second preset durations are related to the performance of the range hood's fan; therefore, specific values ​​are not limited here, and the first and second preset durations can be determined based on test data from the range hood's product development phase.

[0056] In this embodiment of the invention, the first reference speed data corresponding to the current speed specifically includes: a first reference speed and a second reference speed, the current speed being between the first reference speed and the second reference speed, the first reference speed being the closest speed that is higher than the current speed, and the second reference speed being the closest speed that is lower than the current speed.

[0057] Referring to Table 1 above as an example, if the current speed is 1250 r / min, by looking up the table, we can obtain the first reference speed as 1300 r / min and the second reference speed as 1200 r / min. If the current speed is 1010 r / min, by looking up the table, we can obtain the first reference speed as 1100 r / min and the second reference speed as 1000 r / min.

[0058] Similarly, the reference damper data corresponding to the current operating current obtained from the duct basic data includes: the first reference damper value corresponding to the first reference speed and the current operating current, and the second reference damper value corresponding to the second reference speed and the current operating current.

[0059] Continuing with the example from Table 1 above, if the first reference speed is 1300 r / min and the second reference speed is 1200 r / min, and the current operating current is between the reference current data A3 and A4, by referring to the table, we can determine that the first reference damper value (higher damper value) is M4% and the second reference damper value (lower damper value) is M3%.

[0060] After obtaining the first reference speed data, based on the air performance relationship between the first reference speed data and the reference current data, the current speed, the first reference speed data, and the reference current data are subjected to a first interpolation process to obtain the current calculation data corresponding to the current operating current.

[0061] The current calculation data obtained through the first interpolation process includes: a first current calculation result and a second current calculation result. The first current calculation result is the current corresponding to the current speed at a higher damper value, and the second current calculation result is the current corresponding to the current speed at a lower damper value.

[0062] Specifically, based on the aerodynamic performance relationship between the first reference speed data and the first set of reference currents, the current speed and the first reference speed data are subjected to a first interpolation process to obtain the first current calculation result corresponding to the current operating current. The first set of reference currents is the reference current corresponding to the first reference speed data at a higher damper value.

[0063] Specifically, based on the aerodynamic performance relationship between the first reference speed data and the second set of reference currents, the current speed and the first reference speed data are subjected to a first interpolation process to obtain the second current calculation result corresponding to the current operating current. The second set of reference currents is the reference current corresponding to the first reference speed data at a lower damper value.

[0064] In this embodiment of the invention, the air performance relationship refers to the proportional relationship between the current and the rotational speed of the fan.

[0065] Specifically, the first reference speed and the second reference speed satisfy an aerodynamic performance relationship with the first set of reference currents I1 and I2 corresponding to the higher damper value. Specifically, the proportional relationship between the first reference speed n1, the second reference speed n2, and the corresponding first set of reference currents I1 and I2 can be expressed as follows:

[0066]

[0067] Wherein, I1 is the reference current corresponding to the first reference speed n1 at a higher damper value; I2 is the reference current corresponding to the second reference speed n2 at a lower damper value.

[0068] Based on the aerodynamic performance relationship between the first reference speed n1, the second reference speed n2, and the corresponding first set of reference currents I1 and I2, the following first interpolation formula can be used to calculate the first current calculation result I′1 corresponding to the current speed at a higher damper value:

[0069]

[0070] Where n3 is the current rotational speed of the fan.

[0071] Similarly, the first reference speed n1 and the second reference speed n2 also satisfy the aerodynamic performance relationship with the second set of reference currents I3 and I4 corresponding to the lower damper value.

[0072]

[0073] Wherein, I3 is the reference current corresponding to the first reference speed n1 at a higher damper value, and I4 is the reference current corresponding to the second reference speed n2 at a lower damper value.

[0074] Based on the aerodynamic performance relationship between the first reference speed n1, the second reference speed n2, and the second set of reference currents I3 and I4, the following first interpolation formula can be used to calculate the second current I′2 corresponding to the current speed n3 at a lower damper value:

[0075]

[0076] After obtaining the first reference operating current I′1 and the second reference operating current I′2, the actual damper value f3 can be calculated using the second interpolation formula based on the first and second reference damper values ​​obtained from the table lookup, and the first and second current calculation results I′1 and I′2 obtained above.

[0077]

[0078] Where f1 is the first reference damper value (larger), f2 is the second reference damper value (smaller), I5 is the current operating current, I′1 is the larger current among the first and second current calculation results, and I′2 is the smaller current among the first and second current calculation results.

[0079] In this embodiment of the invention, due to a certain degree of blockage in the duct of the range hood, the airflow generated by the fan is reduced due to the blockage. Although the fan operates at the speed required to provide the set airflow, the target effective airflow generated by the fan does not reach the set airflow. Therefore, the smaller the difference between the target effective airflow and the set airflow, the better the range hood's ability to extract cooking fumes, and vice versa.

[0080] To more accurately control the operation of the range hood, in some implementation methods, the target effective air volume corresponding to the current scene information can be determined based on the duct blockage data, including: determining whether the duct blockage data is within the preset duct blockage data range; if so, determining the target effective air volume corresponding to the current scene information based on the duct blockage data.

[0081] Furthermore, if the duct blockage data is not within the preset duct blockage data range, a reminder message can be output to inform the customer. Specifically, if the duct blockage data is greater than the upper threshold of the duct blockage data range, a first reminder message is output to indicate that the range hood's exhaust pipe is completely blocked or severely bent; if the duct blockage data is less than the lower threshold of the duct blockage data range, a second reminder message is output to indicate that the range hood's exhaust pipe has detached.

[0082] Step S103: Determine the target speed required for the range hood fan to provide the target effective air volume, and control the fan to operate at the target speed to provide the target effective air volume.

[0083] In step S103, determining the target rotational speed required for the range hood fan to provide the target effective air volume includes: obtaining second duct reference information corresponding to the target effective air volume from pre-constructed duct basic data; and performing interpolation processing based on the second duct reference information and the target effective air volume to obtain the target rotational speed.

[0084] In this embodiment of the invention, obtaining the second duct reference information corresponding to the target effective air volume includes: obtaining the second reference rotation speed data corresponding to the current rotation speed and the reference air volume data corresponding to the target effective air volume under the actual damper value from the duct basic data.

[0085] In this embodiment of the invention, obtaining the second reference speed data corresponding to the current speed specifically includes: a third reference speed and a fourth reference speed, wherein the current speed is between the third reference speed and the fourth reference speed. The third reference speed is the closest speed in the duct baseline data that is higher than the current speed, and the fourth reference speed is the closest speed in the duct baseline data that is lower than the current speed. Specific implementation details can be found in the implementation method described above for the first reference speed data; for the sake of brevity, they will not be elaborated upon here.

[0086] Similarly, the reference air volume data corresponding to the target effective air volume under the actual damper value, obtained from the basic air duct data, includes: the first reference air volume and the second reference air volume.

[0087] Continuing with the example from Table 1 above, given that the third reference speed is 1300 r / min and the fourth reference speed is 1200 r / min, if the current operating current is between the reference current data A3 and A4, the first reference air volume can be determined as F4 and the second reference air volume as F3 by referring to the table.

[0088] After obtaining the third reference speed, the fourth reference speed, the target effective air volume, the first reference air volume, and the second reference air volume, a third interpolation process is performed to obtain the target speed required for the range hood fan to provide the target effective air volume.

[0089] In practical implementation, the target rotational speed required for the fan to provide the target effective air volume can be calculated using the following interpolation formula:

[0090]

[0091] Where n′ is the target speed required for the fan to provide the target effective air volume, n4 is the third reference speed, n5 is the fourth reference speed, F4 is the first reference air volume, F′ is the target effective air volume, and F3 is the second reference air volume.

[0092] Furthermore, in order to verify the target speed and ensure its accuracy, in step S103, the fan is controlled to run at the target speed to provide the target effective air volume, including: determining whether the target speed is within the corresponding preset boundary range; if so, the fan is controlled to run at the target speed to provide the target effective air volume.

[0093] In practice, the preset boundary ranges differ depending on the current scenario information. These preset boundary ranges can be determined based on experimental data. Specifically, multiple simulated air ducts can be pre-set, and experiments can be conducted on different simulated air ducts to obtain the required rotational speed of the range hood fan to provide the effective airflow under the current scenario information. The preset boundary range can then be set based on this rotational speed. For example, the maximum and minimum rotational speeds of the fan can be specified in the current scenario information. Therefore, the upper and lower threshold boundaries of the preset boundary range can correspond to the maximum and minimum rotational speeds under that current scenario information.

[0094] Furthermore, in some implementations, after determining whether the target speed is within a preset boundary range, if the target speed is not within the preset boundary range, a target speed threshold is determined based on the preset boundary range, and then the target speed is updated based on the target speed threshold, and the fan is controlled to run at the updated target speed.

[0095] If the obtained target speed is greater than the highest speed in the current scene information, the target speed is updated based on the highest speed in the current scene information, and the fan is controlled to run at the highest speed as the target speed; if the obtained target speed is less than the lowest speed in the current scene information, the target speed is updated based on the lowest speed in the current scene information, and the fan is controlled to run at the lowest speed as the target speed.

[0096] Specifically, after controlling the fan to run at the updated target speed, the target effective air volume corresponding to the current scene information is updated based on the updated target speed. This allows the correct target effective air volume to be provided directly for the next control process, avoiding the process of determining the target speed based on an incorrect target effective air volume, thereby improving the speed and accuracy of determining the target speed.

[0097] In this embodiment of the invention, after controlling the fan to run at the target speed, second electrical parameter information can be acquired during the fan's operation at the target speed. Then, the target damper value and actual effective air volume of the range hood under the second electrical parameter information are determined. It is then determined whether the target damper value and actual effective air volume are consistent with the pre-constructed ductwork basic data. If they are not consistent, the ductwork blockage data of the current environment of the range hood are reacquired, and based on the newly acquired ductwork blockage data, a new target effective air volume corresponding to the current scene information is determined. The fan speed is then readjusted until the fan provides an accurate target effective air volume.

[0098] Specifically, adjusting the fan speed can be achieved by using variable frequency drive (VFD) program control for stepless speed regulation, which improves the accuracy of adjusting the fan speed and thus provides a more accurate target effective air volume.

[0099] In the specific implementation process, in order to avoid large fluctuations in the fan speed caused by abnormal power supply to the fan, which would make the target effective air volume required by the fan to provide the current scene information unstable, the operating status of the fan can be monitored while the fan is running at the target speed. Only when the fan is running stably can the second electrical parameter information be obtained.

[0100] Specifically, the second electrical parameter information fed back by the fan includes: the second stable speed of the fan and the second stable current corresponding to the second stable speed. The specific implementation details for determining the corresponding target damper value based on the second electrical parameter information can be found in the previous section on calculating the actual damper value. The actual effective air volume can be calculated by back-calculating from the target speed, and will not be elaborated upon here.

[0101] In some implementations, the damper value and air volume corresponding to the target rotation speed can be set in the duct basic data. Therefore, it is possible to determine whether the target damper value matches the damper value in the duct basic data, and whether the actual effective air volume matches the air volume in the duct basic data. Only when both the actual effective air volume and the target damper value match can the operation control of the range hood be terminated until new current scene information is obtained again.

[0102] Next, please see Figure 2As shown, the technical solutions provided in the embodiments of the present invention are described exemplarily to help people understand the technical solutions protected by the embodiments of the present invention.

[0103] To control the operation of the range hood in a timely manner, basic duct data for the range hood can be pre-built and stored for later use. Then, the following steps can be executed sequentially:

[0104] Step A1: Determine whether current scene information for the range hood has been received. If current scene information is received, proceed to step A2 below; otherwise, end the control of the fan.

[0105] Step A2: Determine whether the range hood fan is running stably, and execute step A3 if the fan is running stably; terminate the control of the fan if the fan is unstable, effectively ensuring the accuracy of the subsequent execution of step A3.

[0106] Step A3: Obtain duct blockage data, and then execute step A4 after obtaining the duct blockage data. The duct blockage data includes the actual damper value that represents the current degree of blockage of the range hood.

[0107] Step A4: Determine the target effective air volume corresponding to the current scene information based on the duct blockage data, then determine the target speed required for the range hood fan to provide the target effective air volume, and perform boundary processing on the target speed according to the preset boundary range.

[0108] Step A5: Control the fan speed based on the processed target speed, determine whether the fan is running stably, and execute step A6 when the fan is running stably; end when the fan is unstable, effectively ensuring the accuracy of the subsequent execution of step A6.

[0109] Step A6: Obtain the second electrical parameter information to determine the target damper value and actual effective air volume of the range hood under the second electrical parameter information, and determine whether the target damper value and actual effective air volume are consistent with the pre-constructed duct basic data. If they are consistent, the control of the fan ends; if they are not consistent, step A3 is executed again.

[0110] In addition, duct blockage data can also include a K-value representing the current degree of blockage of the range hood. The K-value can be obtained based on the fan's airflow and air pressure; the smaller the K-value, the greater the current degree of blockage, and vice versa. Specifically, the K-value can be calculated using the following formula:

[0111]

[0112] In the formula, K is the K value representing the current degree of blockage of the range hood, C is the air volume of the fan, and P is the air pressure of the fan.

[0113] To determine the target effective air volume corresponding to the current scene information based on duct blockage data, for example, if three users have different degrees of duct blockage in their range hoods, and all three users plan to make durian stir-fried pork slices, then these three users are using the same scene information. Therefore, the current scene information obtained by these three range hoods is the same, and the required effective air volume is the same.

[0114] If the target effective airflow for durian stir-fried pork slices is 8 cubic meters per minute, then the K-values ​​for these three range hoods are 0.192187414413686, 0.58264543905776, and 1.57335664876618, respectively. Because range hoods operate in complex environments, to ensure effective fume extraction even with significant blockage, the relevant technologies require setting the fan speed to be relatively high.

[0115] In the embodiments of the present invention, for range hoods with smaller K values, although the duct is more blocked, as long as the fan is controlled to provide an air volume that is exactly the same as the target effective air volume, the fume extraction effect can be guaranteed, the fan speed is reduced, and the noise and energy consumption caused by excess air volume are avoided.

[0116] In this embodiment of the invention, the range hood corresponding to a larger K value has a less obstructed duct, and therefore the fan needs to overcome less air resistance in the duct. Thus, the fan can be controlled to provide an airflow that precisely matches the target effective airflow, thereby reducing the fan speed. For example, if the original fan airflow is 13 cubic meters per minute, this embodiment of the invention can adjust and control the fan airflow from 13 cubic meters per minute to 8 cubic meters per minute, reducing the noise and energy loss caused by the excess airflow of 5 cubic meters per minute.

[0117] In this embodiment of the invention, the range hood corresponding to the intermediate K value has a generally low degree of duct blockage, and the fan needs to overcome a relatively low level of air resistance in the duct. Therefore, the fan can be controlled to provide an airflow that is exactly consistent with the target effective airflow, thereby reducing the fan speed. For example, if the original fan airflow is 10 cubic meters per minute, through this embodiment of the invention, the fan airflow can be adjusted and controlled from 10 cubic meters per minute to 8 cubic meters per minute, reducing the noise and energy consumption caused by the excess airflow of 2 cubic meters per minute.

[0118] Below, to illustrate how the technical solution of this invention can reduce noise and energy consumption caused by excessive airflow from the range hood while ensuring effective fume extraction, in conjunction with... Figures 3-4 The technical effects achieved by this invention are explained as follows:

[0119] First of all, Figure 3 In the graph, the horizontal axis represents airflow in cubic meters per minute, and the vertical axis represents air pressure in Pascals. Curve 301 represents the airflow-air pressure relationship under normal speed control, where air pressure gradually decreases as airflow increases. Curve 302 is the curve after constant airflow control for energy saving and noise reduction. In the high air pressure region, the curve trend is consistent with curve 301. After reaching the target effective airflow that meets the scenario information, such as 8 cubic meters per minute, the airflow no longer increases as the air pressure decreases and will remain constant.

[0120] exist Figure 3 In the same air duct, as the air volume gradually increases, the air pressure increases according to a fixed K-value relationship, forming a K-line in the "Air Volume-Air Pressure" graph corresponding to that air duct. Curve 303 represents the K-line for medium-resistance users, indicating the "Air Volume-Air Pressure" relationship for air ducts with moderate blockage; the air pressure increases with increasing air volume. Curve 304 represents the K-line for high-resistance users, indicating the "Air Volume-Air Pressure" relationship for air ducts with higher blockage; the air pressure increases more with increasing air volume than for air ducts with moderate blockage, and has a steeper slope. Curve 305 represents the K-line for low-resistance users, indicating the "Air Volume-Air Pressure" relationship for air ducts with lower blockage; the air pressure increases less with increasing air volume than for air ducts with moderate blockage, and has a shallower slope.

[0121] For the same user scenario, if the scenario information is consistent, that is, the required target effective air volume is consistent, taking a target effective air volume of 8 cubic meters per minute as an example, any air volume greater than 8 cubic meters per minute under this scenario information is redundant and will not bring better smoke extraction effect. Instead, it will increase power consumption and noise.

[0122] When a user operates the range hood with an effective airflow of 8 cubic meters per minute, if the airflow setting is 12 cubic meters per minute, the hood will operate at the intersection of curves 303 and 301 (10.00, 171.63), meaning it provides 10 cubic meters per minute of suction airflow, 2 cubic meters per minute more than the effective airflow. If constant airflow control is used, the range hood will operate at the intersection of curves 303 and 302 (8.00, 109.84), meaning it provides sufficient suction for the current usage scenario, reducing the noise increase caused by the 2 cubic meters per minute airflow reduction compared to the setting.

[0123] When a user with high air resistance uses the range hood in a scenario with an effective airflow of 8 cubic meters per minute, if the airflow setting is 12 cubic meters per minute, the range hood will operate at the intersection of curves 304 and 301 (8.00, 333.01), meaning that the range hood provides an airflow of 8 cubic meters per minute. If constant airflow control is used, the range hood will operate at the intersection of curves 304 and 302 (8.00, 333.01). Because the user's duct resistance is high at this point, the range hood must ensure that it provides sufficient smoke extraction for the current usage scenario, not sacrificing the intended smoke extraction effect for energy saving and noise reduction.

[0124] When a user with low wind resistance uses the range hood in a scenario with an effective airflow of 8 cubic meters per minute, if the airflow setting is 12 cubic meters per minute, the range hood will operate at the intersection of curves 305 and 301 (11.00, 76.91), meaning that the range hood provides 11 cubic meters per minute of smoke extraction, which is 3 cubic meters per minute more than the effective airflow. If constant airflow control is used, the range hood will operate at the intersection of curves 305 and 302 (8.00, 40.68), meaning that the range hood provides sufficient smoke extraction for the current usage scenario, reducing the noise increase caused by the 3 cubic meters per minute airflow reduction compared to the setting.

[0125] The noise level of a range hood is generally calculated based on a zero air pressure condition. Due to the constant air volume control, a setting of 12 cubic meters per minute can be labeled as 8 cubic meters per minute at zero air pressure. Therefore, it is possible to test the fan noise after reducing it by 4 cubic meters per minute, and the noise level at this setting can be labeled as even lower.

[0126] In summary, constant air volume control offers varying degrees of advantages to users with different levels of blockage, achieving energy saving and noise reduction while ensuring effective smoke extraction.

[0127] For another example, a user is cooking three dishes. Let's say the target effective airflow for steaming durian is 4.6 cubic meters per minute, for durian-wrapped chicken legs it's 8 cubic meters per minute, and for frying durian pastries it's 10 cubic meters per minute. If the range hood originally provides a fixed airflow of 10 cubic meters per minute, since the duct blockage remains unchanged, when steaming durian, the fan can be controlled to provide only the target effective airflow of 4.6 cubic meters per minute, thus reducing the noise and energy consumption caused by the excess airflow of 5.4 cubic meters per minute; when making durian-wrapped chicken legs, the fan can be controlled to provide only the target effective airflow of 8 cubic meters per minute, thus reducing the noise and energy consumption caused by the excess airflow of 2 cubic meters per minute; and when frying durian pastries, to ensure effective smoke extraction, the fan can be controlled to provide the target effective airflow of 10 cubic meters per minute.

[0128] exist Figure 4 In the diagram, for the same user's air duct, curve 401 can be plotted based on a fixed K value. Curve 402 is the gear control curve, intersecting curve 401 at point (10.00, 171.63), meaning that when using gear control, the range hood provides a suction air volume of 10 cubic meters per minute. Curve 403 is the curve for the high air volume scenario, where the required target effective air volume is 10 cubic meters per minute, intersecting curve 401 at point (10.00, 171.63). This means that when using constant air volume control, the suction air volume provided by the range hood is 10 cubic meters per minute, just like with gear control. Under the premise of meeting the effective suction air volume, the air volume corresponding to 0 wind pressure under constant air volume control is 2 cubic meters per minute less than the air volume corresponding to 0 wind pressure under gear control.

[0129] exist Figure 4 In the figure, curve 404 is the curve under the medium air volume scenario, which intersects curve 401 at the point (8.00, 333.01). This means that when using constant air volume control, the noise caused by air volume of 2 cubic meters per minute is reduced compared to gear control.

[0130] exist Figure 4 In the diagram, curve 405 represents the low airflow scenario and intersects curve 401 at point (4.60, 455.31). This means that using constant airflow control reduces the noise generated by airflow by 7.4 cubic meters per minute compared to gear control.

[0131] In summary, under different usage scenarios within the same user duct, this invention can adaptively adjust the speed of the range hood fan, reducing the fan speed at 0 air pressure, thereby reducing noise during user use and achieving energy saving and noise reduction effects. Furthermore, the lower the target effective air volume required for the usage scenario, the more noise this invention can reduce.

[0132] Secondly, based on the same inventive concept, embodiments of the present invention provide a range hood operation control device, please refer to [link to relevant documentation]. Figure 5 As shown, the operation control device includes:

[0133] The scene information acquisition unit 501 is used to acquire the current scene information set for the range hood.

[0134] The effective air volume determination unit 502 is used to acquire the duct blockage data of the current environment of the range hood, and determine the target effective air volume corresponding to the current scene information based on the duct blockage data.

[0135] The fan operation control unit 503 is used to determine the target speed required for the range hood fan to provide the target effective air volume, and to control the fan to operate at the target speed to provide the target effective air volume.

[0136] After obtaining the duct blockage data of the range hood, this embodiment of the invention can determine the target effective air volume required by the range hood under the current scenario information, and determine the target speed of the fan based on the actual effective air volume. Furthermore, by controlling the fan to run at the target speed, the required speed of the fan under the scenario can be dynamically adjusted according to the degree of blockage of the range hood, so as to accurately provide the target effective air volume under the scenario. This ensures that the effective air volume of the range hood remains constant under different duct blockage conditions. Therefore, while ensuring the fume extraction effect, it reduces the noise and energy consumption caused by the range hood providing excess air volume.

[0137] As an optional implementation, the duct blockage data includes the actual damper value characterizing the current degree of blockage in the range hood, and the effective airflow determination unit 502 is specifically used for:

[0138] The system acquires the first electrical parameter information of the fan during operation; obtains the first duct reference information corresponding to the first electrical parameter information from the pre-constructed duct basic data; and performs interpolation processing based on the first duct reference information and the first electrical parameter information to obtain the actual damper value that characterizes the current degree of blockage of the range hood.

[0139] As an optional implementation, the effective air volume determination unit 502 is further used for:

[0140] Determine whether the duct blockage data is within the preset duct blockage data range; if so, determine the target effective air volume corresponding to the current scene information based on the duct blockage data.

[0141] As an optional implementation, the wind turbine operation control unit 503 is specifically used for:

[0142] From the pre-constructed basic air duct data, obtain the second air duct reference information corresponding to the target effective air volume; perform interpolation processing based on the second air duct reference information and the target effective air volume to obtain the target rotational speed.

[0143] As an optional implementation, the wind turbine operation control unit 503 is further used for:

[0144] Determine whether the target speed is within the corresponding preset boundary range; if so, control the fan to run at the target speed to provide the target effective air volume.

[0145] As an optional implementation, the wind turbine operation control unit 503 is further used for:

[0146] If the target speed is not within the preset boundary range, the target speed threshold is determined according to the preset boundary range; the target speed is updated based on the target speed threshold, and the fan is controlled to run at the updated target speed.

[0147] As an optional implementation, the wind turbine operation control unit 503 is further used for:

[0148] Based on the updated target rotation speed, update the target effective air volume corresponding to the current scene information.

[0149] As an optional implementation, the operation control device further includes:

[0150] The fan speed verification unit 504 is used to acquire second electrical parameter information during the operation of the fan at the target speed, determine the target damper value and actual effective air volume of the range hood under the second electrical parameter information, and determine whether the target damper value and actual effective air volume are consistent with the pre-constructed ductwork basic data. If they are inconsistent, the following steps are repeated: acquiring ductwork blockage data of the current environment of the range hood, determining the target effective air volume corresponding to the current scene information based on the ductwork blockage data, and determining the target speed required for the range hood fan to provide the target effective air volume. This implementation method effectively ensures that the range hood can operate with a constant air volume.

[0151] Thirdly, embodiments of the present invention provide a range hood, please refer to [link / reference needed]. Figure 6 As shown, the range hood includes a memory 604, a processor 602, and a computer program stored in the memory 604 and executable on the processor 602. When the processor 602 executes the computer program, it implements the aforementioned range hood operation control method.

[0152] Among them, Figure 6 In this document, a bus architecture (represented by bus 600) is used. Bus 600 may include any number of interconnected buses and bridges, linking various circuits including one or more processors represented by processor 602 and memory represented by memory 604. Bus 600 may also link various other circuits such as peripheral devices, voltage regulators, and power management circuits, which are well known in the art and therefore will not be described further herein. Bus interface 606 provides an interface between bus 600 and receiver 601 and transmitter 603. Receiver 601 and transmitter 603 may be the same element, i.e., a transceiver, providing a unit for communicating with various other devices over a transmission medium. Processor 602 is responsible for managing bus 600 and general processing, while memory 604 can be used to store data used by processor 602 during operation.

[0153] After obtaining the duct blockage data of the range hood, this embodiment of the invention can determine the target effective air volume required by the range hood under the current scenario information, and determine the target speed of the fan based on the actual effective air volume. Furthermore, by controlling the fan to run at the target speed, the required speed of the fan under the scenario can be dynamically adjusted according to the degree of blockage of the range hood, so as to accurately provide the target effective air volume under the scenario. This ensures that the effective air volume of the range hood remains constant under different duct blockage conditions. Therefore, while ensuring the fume extraction effect, it reduces the noise and energy consumption caused by the range hood providing excess air volume.

[0154] It is understood that further implementation details of the range hood in the embodiments of the present invention can be found in the aforementioned embodiments of the range hood operation control method, and implementation details of other structures can be found in related technologies, which will not be repeated here.

[0155] The functions described herein can be implemented in hardware, software executed by a processor, firmware, or any combination thereof. If implemented in software executed by a processor, the functions can be stored as one or more instructions or codes on or transmitted via a computer-readable medium. Other examples and embodiments are within the scope and spirit of this invention and the appended claims. For example, due to the nature of software, the functions described above can be implemented using software executed by a processor, hardware, firmware, hardwired, or any combination thereof. Furthermore, the functional units can be integrated into a single processing unit, or each unit can exist physically separately, or two or more units can be integrated into a single unit.

[0156] In the several embodiments provided in this application, it should be understood that the disclosed technical content can be implemented in other ways. The device embodiments described above are merely illustrative; for example, the division of units can be a logical functional division, and in current implementations, there may be other division methods. For example, multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Furthermore, the displayed or discussed mutual couplings, direct couplings, or communication connections can be through some interfaces; indirect couplings or communication connections between units or modules can be electrical or other forms.

[0157] The units described as separate components may or may not be physically separate. Similarly, the components of a control device may or may not be physical units; they may be located in one place or distributed across multiple units. Some or all of the units can be selected to achieve the purpose of this embodiment, depending on current needs.

[0158] If the integrated unit 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 the present invention, in essence, or the part that contributes to the prior art, or all or 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 the present invention. The aforementioned storage medium includes various media capable of storing program code, such as USB flash drives, read-only memory (ROM), random access memory (RAM), portable hard drives, magnetic disks, or optical disks.

[0159] The above are merely embodiments of the present invention and are not intended to limit the invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of the claims of the present invention.

Claims

1. A method for controlling the operation of a range hood, characterized in that, include: Obtain the current scene information set for the range hood, wherein the current scene information is the set range hood setting or the set cooking method; Obtain the duct blockage data of the current environment of the range hood, the duct blockage data including the actual damper value representing the current degree of blockage of the range hood; The target effective air volume corresponding to the current scene information is determined based on the air duct blockage data; Determining the target rotation speed required for the range hood fan to provide the target effective air volume includes: obtaining second duct reference information corresponding to the target effective air volume from pre-constructed duct basic data; The second duct reference information includes: second reference speed data corresponding to the current speed obtained from the duct basic data: third reference speed and fourth reference speed, and reference air volume data corresponding to the target effective air volume under the actual damper value: first reference air volume and second reference air volume; the target speed is obtained by interpolation processing based on the second duct reference information and the target effective air volume. The fan is controlled to operate at the target speed to provide the target effective air volume.

2. The method as described in claim 1, characterized in that, The duct blockage data includes the actual damper value representing the current degree of blockage of the range hood. Obtaining the current duct blockage data of the range hood includes: Obtain the first electrical parameter information of the fan during operation; Obtain the first air duct reference information corresponding to the first electrical parameter information from the pre-constructed air duct basic data; Interpolation is performed based on the first air duct reference information and the first electrical parameter information to obtain the actual damper value that characterizes the current degree of blockage of the range hood.

3. The method as described in claim 1, characterized in that, Controlling the fan to operate at the target speed to provide the target effective air volume includes: Determine whether the target rotational speed is within the corresponding preset boundary range; If so, the fan is controlled to operate at the target speed to provide the target effective air volume.

4. The method as described in claim 3, characterized in that, After determining whether the target rotational speed is within a preset boundary range, the method further includes: If the target rotational speed is not within the preset boundary range, then the target rotational speed threshold is determined based on the preset boundary range; The target speed is updated based on the target speed threshold, and the fan is controlled to operate at the updated target speed.

5. The method as described in claim 4, characterized in that, After controlling the fan to operate at the updated target speed, the method further includes: The target effective air volume corresponding to the current scene information is updated based on the updated target rotation speed.

6. The method as described in claim 1, characterized in that, Determining the target effective airflow corresponding to the current scene information based on the duct blockage data includes: Determine whether the duct blockage data is within a preset duct blockage data range; If so, the target effective airflow corresponding to the current scenario information is determined based on the duct blockage data.

7. The method as described in claim 1, characterized in that, After controlling the fan to operate at the target speed, the method further includes: During the operation of the fan at the target speed, the second electrical parameter information is acquired; Determine the target damper value and actual effective air volume of the range hood under the second electrical parameter information; Determine whether the target damper value and the actual effective air volume are consistent with the pre-constructed ductwork basic data; If not, repeat the steps: obtain the duct blockage data of the current environment of the range hood, determine the target effective air volume corresponding to the current scene information based on the duct blockage data, and determine the target speed required for the range hood fan to provide the target effective air volume.

8. A range hood operation control device, characterized in that, include: The data acquisition unit is used to acquire current scene information set for the range hood; acquire duct blockage data of the current environment of the range hood, wherein the current scene information is the set range hood setting or the set cooking mode, and the duct blockage data includes the actual damper value representing the current degree of blockage of the range hood. An effective air volume determination unit is used to determine the target effective air volume corresponding to the current scene information based on the air duct blockage data; A fan control unit is configured to determine the target rotational speed required for the range hood fan to provide the target effective airflow, including: obtaining second duct reference information corresponding to the target effective airflow from pre-constructed duct baseline data; wherein the second duct reference information includes: second reference rotational speed data corresponding to the current rotational speed obtained from the duct baseline data: a third reference rotational speed and a fourth reference rotational speed, and reference airflow data corresponding to the target effective airflow under the actual damper value: a first reference airflow and a second reference airflow; performing interpolation processing based on the second duct reference information and the target effective airflow to obtain the target rotational speed; and controlling the fan to operate at the target rotational speed to provide the target effective airflow.

9. A range hood, characterized in that, It includes a memory, a processor, and a program stored in the memory and executable on the processor, wherein the processor, when executing the program, implements the method as described in any one of claims 1-7.

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