Control method of range hood and linkage system of range hood and cooking stove

Abstract

This application relates to a control method for a range hood and a range hood-cooktop linkage system. By acquiring the operating status and power level of each of the three burners in a three-burner cooktop, differentiated flap control strategies are implemented for three different operating scenarios. When only one burner is operating, only the corresponding flap is opened while the other flap remains closed, achieving precise positioning of the smoke extraction area and the smoke source, avoiding energy waste caused by ineffective flap opening. When only the central burner is operating, both flaps open simultaneously, forming a concentrated negative pressure area in the center of the air inlet, effectively capturing the smoke generated by the central burner. When at least two burners are operating, both flaps open, with the opening angle determined based on the maximum power level of the currently operating burner, ensuring sufficient smoke collection capacity under multi-burner cooking conditions. This application achieves differentiated flap control based on the different burner operating states of a three-burner cooktop, significantly improving smoke extraction efficiency and reducing system energy consumption.

Description

Technical Field

[0001] This application relates to the field of kitchen appliance control technology, and in particular to a control method for a range hood and a range hood-cooker linkage system. Background Technology

[0002] Cooktop-range hood linkage technology has been widely used in the coordinated control of cooktops and range hoods. Existing side-draft range hoods typically feature a single or double flap structure at the front of their air inlet. By opening and closing the flaps, the negative pressure area at the air intake is altered to improve the collection and extraction of cooking fumes. Simultaneously, the cooktop and range hood are linked via a communication module, allowing the range hood to automatically start or adjust its fan speed based on the cooktop's on / off status.

[0003] However, existing range hood and cooktop linkage systems still have the following shortcomings: First, the flap control method is simplistic. Most solutions use a single flap structure or a double flap synchronous opening and closing structure, which cannot provide differentiated control based on the actual burner position used on the stove. For three-burner stoves with three independent burners (left, center, and right), when only the left or right burner is working, the existing double flap synchronous opening and closing solution will cause the flap on the unused side to open ineffectively, resulting in a mismatch between the negative pressure zone and the source of oil fumes, reducing smoke extraction efficiency and wasting energy. When only the center burner is working, the existing solutions lack targeted control strategies, often only having a single flap action or an unreasonable angle of action on both sides, making it difficult to form an effective central smoke-gathering negative pressure zone.

[0004] Secondly, the adjustment of the flap opening angle is rudimentary. Existing solutions mostly use fixed settings to control the flap angle, failing to provide continuous and adaptive adjustment based on the stove's heat level, making it difficult to meet the smoke collection needs under different cooking conditions. While some solutions can adjust the angle according to the recipe or heat level, they do not establish a linear mapping relationship between the heat level and the flap angle, nor do they consider the impact of dynamic factors such as oil fume concentration and cookware height on smoke collection effectiveness.

[0005] Third, the flap drive mechanism lacks precise positioning capability. Existing flap drive motors generally do not have position detection function, and angle control relies on open-loop drive, resulting in inaccurate flap reset reference, asynchronous operation of left and right flaps, and accumulation of positioning deviations after long-term use. This not only affects the smoke collection effect, but also reduces the product's operational stability and service life.

[0006] In summary, a key drawback of traditional range hood and cooktop linkage solutions is that they cannot adaptively and precisely control the independent opening and closing and angle adjustment of the left and right flaps of the dual-flap range hood according to the actual usage status of the three-burner cooktop. This results in low smoke extraction efficiency, energy waste, and a poor user experience. Summary of the Invention

[0007] Therefore, it is necessary to address the problems of traditional range hood and cooktop linkage solutions, which cannot adaptively and accurately control the independent opening and closing and angle adjustment of the left and right flaps of the double-flap range hood according to the actual usage status of the three-burner cooktop, resulting in low smoke extraction efficiency, energy waste and poor user experience. The aim is to provide a range hood control method and a range hood and cooktop linkage system to achieve precise and adaptive linkage control between the three-burner cooktop and the double-flap range hood.

[0008] On the one hand, this application provides a control method for a range hood, including: Obtain the working status and firepower level of the first burner, the central burner, and the second burner in a three-burner stove; In response to the fact that only one of the first and second burners is in working condition, the flap corresponding to the burner in working condition is controlled to open to an angle corresponding to the fire level of the burner in working condition, and the other flap is controlled to remain closed. In response to the fact that only the central burner is in working condition, the first and second flaps are both opened to an angle corresponding to the firepower level of the central burner. In response to at least two burners being in operation, the first and second flaps are controlled to open to an angle corresponding to the maximum firepower level of the burner in operation.

[0009] On the other hand, this application also provides a range hood and stove linkage system, including: Three-burner stove; A range hood is disposed opposite to the three-burner cooktop; the range hood is configured to perform the range hood control method as described above.

[0010] This application relates to a control method for a range hood and a range hood-cooktop linkage system. By acquiring the operating status and power level of each of the three burners in a three-burner cooktop, differentiated flap control strategies are implemented for three different operating scenarios. When only one burner is operating, only the corresponding flap is opened while the other flap remains closed, achieving precise positioning of the smoke extraction area and the smoke source, avoiding energy waste caused by ineffective flap opening. When only the central burner is operating, both flaps open simultaneously, forming a concentrated negative pressure area in the center of the air inlet, effectively capturing the smoke generated by the central burner. When at least two burners are operating, both flaps open, with the opening angle determined based on the maximum power level of the currently operating burner, ensuring sufficient smoke collection capacity under multi-burner cooking conditions. This application achieves differentiated flap control based on the different burner operating states of a three-burner cooktop, significantly improving the smoke extraction rate and reducing system energy consumption. Attached Figure Description

[0011] Figure 1This is a flowchart illustrating a control method for a range hood provided in one embodiment of this application.

[0012] Figure 2 This is a schematic diagram of a range hood and stove linkage system provided in one embodiment of this application.

[0013] Figure 3 This is a diagram showing the linkage state of a range hood and a stove when only the first burner head is ignited, after implementing a control method for a range hood provided in an embodiment of this application.

[0014] Figure 4 This is a diagram showing the linkage state of a range hood and a stove when only the second burner head is ignited, after implementing a control method for a range hood provided in an embodiment of this application.

[0015] Figure 5 This is a diagram showing the linkage state of a range hood and a stove when at least two burners are ignited, after implementing a control method for a range hood provided in an embodiment of this application.

[0016] Figure label: 10 - Three-burner stove; 110 - First side burner; 120 - Central burner; 130 - Second side burner; 20 - Range hood; 210 - First flap; 220 - Second flap. Detailed Implementation

[0017] To make the objectives, technical solutions, and advantages of this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the scope of this application.

[0018] This application provides a control method for a range hood. It should be noted that the control method provided in this application is applicable to range hoods of any brand and type. Optionally, the control method provided in this application is applicable to range hoods with at least two flaps and a smoke-collecting function.

[0019] Furthermore, the control method for a range hood provided in this application does not limit the subject on which it is implemented. Optionally, the subject on which the control method for a range hood provided in this application is implemented can be a range hood used in conjunction with a three-burner cooktop.

[0020] like Figure 1 As shown, in one embodiment of this application, the control method for the range hood includes: S100: Obtain the working status and firepower level of the first side burner, the central burner, and the second side burner in a three-burner stove.

[0021] S200, in response to the fact that only one of the first burner head and the second burner head is in working condition, controls the flap corresponding to the burner head in working condition to open to an angle corresponding to the fire level of the burner head in working condition, and controls the other flap to remain closed.

[0022] S300, in response to the fact that only the central burner is in working state, controls both the first and second flaps to open to an angle corresponding to the firepower level of the central burner.

[0023] S400, in response to at least two burners being in operation, controls both the first and second flaps to open to an angle corresponding to the maximum firepower level of the burner in operation.

[0024] Specifically, the range hood control method provided in this embodiment is applied to a side-suction range hood equipped with two independent left and right flaps, which is used in conjunction with a three-burner cooktop. The three-burner cooktop has a first side burner, a central burner, and a second side burner arranged sequentially on its panel; all three burners can be independently ignited and have their heat adjusted. For example... Figure 1 As shown, the first burner can be the left burner when the range hood is in its natural position. The second burner can be the right burner when the range hood is in its natural position. The central burner can be the burner located in the middle when the range hood is in its natural position, that is, the central burner is located between the first and second burners.

[0025] Optionally, the firepower level can be divided into 1 to 10 levels. The higher the firepower level value, the greater the firepower corresponding to that level.

[0026] First, the range hood controller obtains the real-time operating status and heat level of each burner in the three-burner cooktop via the range hood-cooktop linkage communication module. This module is built into the range hood. There are two burner operating states: one is active (ignition on) and the other is off (flameout off). The heat level in S100 indicates the current heat level; for example, the left burner is at heat level 4, the central burner at heat level 0, and the right burner at heat level 0.

[0027] Next, based on the obtained working status of the burners, the controller determines the distribution of burners currently in operation and executes differentiated flap control strategies: Scenario 1: Only one of the first and second burners is active. For example, only the left burner is ignited and operating at power level 4, while the right and central burners are off. In this case, the controller opens the flap corresponding to the left burner to an angle corresponding to power level 4, for example, an angle of 13.6 degrees calculated based on a preset linear mapping relationship. This 13.6 degrees can be obtained by multiplying the power level 4 by the unit angle increment of 3.4 degrees for each level. Simultaneously, the right flap remains closed at 0 degrees.

[0028] Similarly, when only the right burner is working, the controller opens the flap corresponding to the right burner and closes the left flap simultaneously. Optionally, the first burner is the left burner, and the first flap is the flap corresponding to the first burner. The second burner is the right burner, and the second flap is the flap corresponding to the second burner.

[0029] Scenario 2: Only the central burner is operational. For example, only the central burner is ignited and operating at power level 5, while both left and right burners are off. In this case, the controller simultaneously opens the left and right flaps to the angle corresponding to power level 5. Multiplying 3.4 degrees by power level 5 gives an opening angle of 17 degrees. With both flaps open simultaneously, a symmetrical negative pressure zone is created in the central area of ​​the air inlet.

[0030] Scenario 3: At least two burners are in operation. For example, the left burner is operating at power level 4, the central burner at power level 6, and the right burner is off. In this case, the controller iterates through all operating burners, identifies the maximum power level, and then controls both the left and right flaps to open to the angle corresponding to that maximum power level. For example, if the maximum power level found is 6, then both the first and second flaps will open to 20.4 degrees, where 20.4 degrees is 3.4 degrees multiplied by the power level of 6.

[0031] By differentiating the control of the above three scenarios, the precise matching of the flip-plate action with the position of the stove head is achieved.

[0032] In this embodiment, by acquiring the working status and power level of each of the three burners in a three-burner stove, differentiated flap control strategies are implemented for three different working scenarios. When only one burner is working, only the corresponding flap is opened while the other flap remains closed, achieving precise positioning of the smoke extraction area and the source of fumes, avoiding energy waste caused by ineffective flap opening. When only the central burner is working, both flaps open simultaneously, forming a concentrated negative pressure area in the center of the air inlet, effectively capturing the fumes generated by the central burner. When at least two burners are working, both flaps open, with the opening angle determined based on the maximum power level of the currently working burner, ensuring sufficient smoke collection capacity under simultaneous cooking conditions with multiple burners. This application achieves differentiated flap control based on the different working statuses of the three burners in a three-burner stove, significantly improving the fume extraction rate and reducing system energy consumption.

[0033] In one embodiment of this application, the control method for the range hood further includes: S110, acquire the oil fume concentration signal.

[0034] S120, determine the oil fume compensation coefficient based on the oil fume concentration signal.

[0035] S130, determine the basic angle according to the firepower level.

[0036] S140, Based on the product of the base angle and the oil fume compensation coefficient, generate the compensated target angle.

[0037] S150, the compensated target angle is used as the angle for controlling the opening of the flap.

[0038] Specifically, based on the aforementioned embodiments of the range hood control method in S100 to S400, this embodiment further introduces an oil fume concentration compensation mechanism. In actual cooking, the relationship between heat level and the amount of oil fume generated is not strictly linear. For example, frying food may produce a large amount of oil fume even with low heat, while stewing food may produce less oil fume with higher heat. Therefore, simply controlling the flap angle based on the heat level may result in insufficient smoke collection capacity of the range hood or excessive flap opening.

[0039] In this embodiment, a smoke concentration sensor can be installed in the smoke intake area of ​​the range hood. The smoke concentration sensor is used to collect real-time signals of the smoke concentration generated during cooking. Simultaneously, a preset baseline smoke concentration is established in the system. The baseline oil fume concentration can be set to a value corresponding to a moderate oil fume concentration. For example, the baseline oil fume concentration can be set to 2.5 mg / m³.

[0040] The smoke concentration sensor can be an infrared scattering smoke sensor or a laser dust sensor.

[0041] After acquiring the oil fume concentration signal, the controller determines the current oil fume concentration based on the oil fume concentration signal. Based on the current concentration of cooking fumes Compared with the baseline concentration The comparison results determine the oil fume compensation coefficient. .

[0042] At the same time, the controller determines the base angle based on the firepower level obtained by S100. The base angle can be understood as the nominal angle value corresponding to the firepower level, for example... The calculation formula can be: Formula 1. Wherein, From a basic perspective. This is the firepower setting. The unit angle increment corresponding to each firepower level.

[0043] For example, when the firepower setting is level 4, the base angle .

[0044] The controller will adjust the base angle. With oil fume compensation coefficient Multiply to generate the compensated target angle. See Formula 2.

[0045] Formula 2. Wherein, The target angle after compensation. From a basic perspective. This is the oil fume compensation coefficient.

[0046] For example, when the base angle It is 13.6 degrees and the oil fume compensation coefficient When the value is 1.1, the compensated target angle The angle is 14.96 degrees. Finally, the controller uses this compensated target angle as the angle for controlling the flap opening, replacing the original angle value directly calculated based on the fire level, that is, replacing the original angle values ​​calculated in S200, S300, and S400.

[0047] In this embodiment, by introducing the oil fume concentration signal, an oil fume compensation coefficient is calculated, and the base angle is multiplied by the compensation coefficient to generate a compensated target angle. This compensated target angle is used as the angle to control the opening of the flap, thus achieving adaptive adjustment of the flap angle to the actual amount of oil fume. This embodiment overcomes the defect that "firepower does not equal oil fume volume" when controlling the angle solely based on the firepower level. When the oil fume concentration is high, the flap angle is automatically increased to enhance smoke collection, and when the oil fume concentration is low, the flap angle is automatically decreased to save energy, thus optimizing the energy efficiency ratio of the range hood.

[0048] In one embodiment of this application, S120 includes determining the oil fume compensation coefficient based on the oil fume concentration signal, which includes: S121, determine the current oil fume concentration based on the oil fume concentration signal.

[0049] S122, in response to the current oil fume concentration being greater than a first concentration threshold, the oil fume compensation coefficient is determined as the first coefficient.

[0050] S123, in response to the current oil fume concentration being less than the second concentration threshold, the oil fume compensation coefficient is determined as the second coefficient.

[0051] S124, in response to the current oil fume concentration being greater than or equal to the second concentration threshold and less than or equal to the first concentration threshold, the oil fume compensation coefficient is determined as the third coefficient.

[0052] Specifically, this embodiment defines the step of "determining the oil fume compensation coefficient" in S120 by presetting a first concentration threshold and a second concentration threshold, and setting the corresponding compensation coefficient.

[0053] Optionally, the first concentration threshold can be set to 1.2 times the reference concentration. The first coefficient can be set to 1.1. The second concentration threshold can be set to 0.8 times the reference concentration. The second coefficient can be set to 0.9. The third coefficient can be set to 1.0.

[0054] After acquiring the oil fume concentration signal from the smoke concentration sensor, the controller first determines the current oil fume concentration based on this signal. Then, the following conditional logic is executed: If the current oil fume concentration Greater than the first concentration threshold, for example >1.2 This indicates that the concentration of cooking fumes is too high, requiring enhanced fume collection capabilities. Therefore, the fume compensation coefficient should be adjusted. The first coefficient is set to 1.1, ensuring the flap angle is within the base angle. An increase of 10%.

[0055] If the current oil fume concentration Less than the second concentration threshold, for example <0.8 This indicates that the oil fume concentration is too low, and the smoke collection intensity can be appropriately reduced to save energy. Therefore, the oil fume compensation coefficient should be adjusted accordingly. The second coefficient is determined, and it can be 0.9, so that the flip-up angle is within the base angle. The price has decreased by 10%.

[0056] If the current oil fume concentration Greater than or equal to the second concentration threshold and less than or equal to the first concentration threshold, for example, 0.8. ≤ ≤1.2 This indicates that the concentration of cooking fumes is within the normal range and no additional compensation is needed. The third coefficient is set as 1.0, and the flip angle is output according to the base angle.

[0057] The oil fume compensation coefficient was achieved through the above three-level threshold judgment. The rapid and stable determination avoids control delays caused by complex calculations.

[0058] In this embodiment, the method for determining the oil fume compensation coefficient is further defined. Based on the comparison results between the oil fume concentration signal and the first concentration threshold and the second concentration threshold, the compensation coefficient is determined as the first coefficient, the second coefficient, or the third coefficient, respectively. This three-level threshold judgment rule is simple and reliable, avoiding control delays caused by complex calculations, and achieving rapid and stable matching between oil fume concentration and flap angle.

[0059] In one embodiment of this application, the control method for the range hood further includes: S160, Obtain the height signal of the pot set on the three-burner stove.

[0060] S170, determine the gear compensation value based on the comparison result between the altitude signal and the reference altitude value.

[0061] S180, generate a compensated firepower level based on the sum of the firepower level and the level compensation value.

[0062] S190, replace the obtained firepower level with the compensated firepower level.

[0063] Specifically, based on the aforementioned embodiments of the range hood control method S100 to S400, this embodiment further introduces a cookware height compensation mechanism. Different cookware heights result in different distances between the point of oil fume generation and the range hood's air inlet. Oil fumes generated by tall cookware need to rise a longer distance to be extracted, and during this process, the fumes are more easily dispersed in all directions. Tall cookware can be a steamer or cooking pot; although steamers and cooking pots are used for steaming and cooking, they still produce water vapor carrying oil, which can also be considered a type of oil fume. The oil fume generation point of short cookware is closer to the air inlet, making it easier to capture. A typical short cookware is a flat-bottomed pan.

[0064] In this embodiment, a distance detection sensor is installed at the bottom of the range hood to detect in real time the distance H from the top or rim of a pot placed on the burner to the bottom of the range hood. The system has a preset reference height value. For example, the typical height corresponding to a standard wok. The distance detection sensor can be an infrared rangefinder or a laser rangefinder.

[0065] After the controller receives the height signal, it can obtain the current height of the cookware. Set the current cookware height. Compared with the reference height value Comparison: like Then determine the gear compensation value. .

[0066] like Then determine the gear compensation value. .

[0067] like Then determine .

[0068] Then, the controller adjusts the power level based on the originally acquired power level. Gear compensation value The sum of these values ​​generates the compensated firepower level. . .

[0069] For example, the original firepower level. There are 5 levels. If the cookware is short, the level compensation value will be adjusted accordingly. The compensated firepower level It has 6 settings. If the cookware is tall, The compensated firepower level It has 4 gears.

[0070] Finally, the controller adjusts the power level to the compensated setting. Replace the original firepower level and will Used for subsequent angle calculations.

[0071] In a composite embodiment formed by combining embodiments S100 to S400 with embodiments S160 to S190, S200, S300, and S400 all involve obtaining the angle corresponding to the firepower level. Therefore, in conjunction with embodiments S160 to S190, it is necessary to control the firepower level after the flap is opened and compensated. The corresponding angle.

[0072] In a composite embodiment formed by combining embodiments S110 to S150 with embodiments S160 to S190, since S130 determines the base angle based on the firepower level, the compensated firepower level should be determined first in S130. Determine the base angle, and then perform base angle compensation for S140 and S150, which will result in the compensated firepower level. Substitute into Formula 2 to calculate the compensated target angle .

[0073] In this embodiment, the height signal of the cookware is acquired, compared with a reference height value to determine the power level compensation value, and the power level is added to the compensation value to generate a compensated power level. This compensated power level replaces the originally acquired power level. This solution solves the problem of changes in the oil fume diffusion path caused by different cookware heights. When the cookware height is lower than the reference value, the oil fume generation point is closer to the air inlet, so the equivalent power level can be appropriately reduced to save energy. When the cookware height is higher than the reference value, the oil fume rises a greater distance and diffuses more easily, so the equivalent power level is increased to enhance smoke collection, thus achieving intelligent compensation of the cookware's geometric parameters for the flap control.

[0074] In one embodiment of this application, S200 includes, in response to only one of the first and second burners being in a working state, controlling the flap corresponding to the burner in the working state to open to an angle corresponding to the firepower level of the burner in the working state, and controlling the other flap to remain closed, including: S210, in response to the fact that only one of the first burner head and the second burner head is in working condition, obtains the firepower level of the burner head that is in working condition.

[0075] S220, according to the preset linear mapping relationship, convert the firepower level of the working burner into the opening and closing angle of the flap.

[0076] Specifically, this embodiment defines the angle determination method for the corresponding working scenario of S200 in embodiments S100 to S400. When the controller determines that only one of the first burner head and the second burner head is in working condition, it first obtains the firepower level of the burner head that is in working condition. For example, only the first burner head is in operation, and =4.

[0077] The system has a preset linear mapping relationship between the firepower level and the flap opening angle. In this embodiment, this linear mapping relationship can be specifically defined as: flap opening angle ,if The effective opening and closing angle range of the flap is 0 degrees to 34 degrees, with a range of 1 to 10. That is, 0 degrees is when the flap is fully closed, and 34 degrees is the maximum opening angle of the flap.

[0078] For example, when the heat setting of the first burner is at level 4, the opening angle of the flap... When the firepower setting is 10, the flap opening angle is... When the firepower setting is 1, the opening angle of the flap is... .

[0079] In this embodiment, the controller uses the calculated flap opening angle as the target angle for controlling the flap to open. At the same time, the controller controls the other flap to remain closed at 0 degrees.

[0080] It should be noted that in the aforementioned embodiments S110 to S150, S130 uses a formula similar to that in this embodiment to determine the base angle based on the firepower level. The difference is that S130 uses formula 1 to calculate the base angle, which is used as the input for oil fume concentration compensation. In contrast, the flap opening and closing angle in this embodiment (the embodiments of S210 to S220) is the direct control angle when compensation is not enabled. This is because the two embodiments can be implemented independently and in parallel without having to be coupled together.

[0081] The aforementioned embodiments S110 to S150 and this embodiment (the embodiments S210 to S220) can also be coupled. In this case, the flap opening and closing angle calculated in S220 is the basic angle in S130. In this embodiment, the scenario of only one burner head being in operation is defined. The power level of the burner head in operation is obtained, and the power level is converted into the flap opening angle according to a preset linear mapping relationship. This linear mapping method enables continuous and smooth adjustment of the flap angle with the power level, avoiding the step-like abrupt changes caused by fixed power level control, and improving the user's cooking experience.

[0082] In one embodiment of this application, S300 includes controlling both the first and second flaps to open to an angle corresponding to the firepower level of the central burner in response to only the central burner being in operation, including: S310, obtain the firepower level of the central stove.

[0083] S320, control the first flap and the second flap to open synchronously to the same angle corresponding to the firepower level of the central burner.

[0084] Specifically, this embodiment defines the control method for the corresponding working scenario of S300 in embodiments S100 to S400. When the controller determines that only the central burner is in working condition, it first obtains the firepower level of the central burner.

[0085] The controller calculates the angle value corresponding to the central burner's firepower level based on the preset linear mapping relationship between the firepower level and the flap opening angle. This principle is consistent with the embodiments in S210 to S220. For example, when the central burner's firepower level is 5, the angle corresponding to that firepower level is 5 multiplied by 3.4 degrees, which is 17 degrees.

[0086] Then, the controller controls the first and second flaps to open synchronously to the target angle. "Synchronous opening" means that both flaps start moving simultaneously, operate at the same angular velocity, and reach the target angle at the same time, ensuring symmetry between the left and right flaps during the opening process. That is, both the first and second flaps open to an angle of 17 degrees.

[0087] When the heat level of the central burner changes, the controller updates the angle in real time and controls the left and right flaps to adjust to the new angle simultaneously. For example, when the heat level of the central burner is adjusted from level 5 to level 7, the left and right flaps adjust simultaneously from 17 degrees to 23.8 degrees.

[0088] In this embodiment, the firepower level of the central burner is obtained when only the central burner is in operation, and the first and second flaps are controlled to open synchronously to the same angle corresponding to that firepower level. This synchronous opening strategy ensures that the oil fumes generated by the central burner can be evenly captured by the symmetrical negative pressure area formed by the two flaps, avoiding the oil fume escape phenomenon caused by inconsistent opening angles of the left and right flaps.

[0089] In one embodiment of this application, the control method for the range hood further includes: S510, obtain the actual opening angle of the first flap.

[0090] S520, calculate the angle deviation between the actual opening angle and the target opening angle.

[0091] S530, a drive correction signal is generated based on the angle deviation, and the motor of the first flap is driven so that the actual opening angle approaches the target opening angle.

[0092] Specifically, this embodiment, based on embodiments S100 to S400, further introduces a closed-loop control mechanism for the flap angle. In existing open-loop control schemes, the drive motor only receives the command "open to a certain angle," but cannot know whether the flap has actually reached that angle. After long-term use, factors such as mechanical clearance and gear wear will lead to the accumulation of angle deviation.

[0093] In this embodiment, each flap is equipped with a DC geared motor with Hall effect position detection. The Hall sensor can detect the rotational position of the motor in real time, thereby calculating the actual opening angle of the flap. Taking the first flap as an example: The controller first determines the target opening angle. Target opening angle The angle value is calculated based on the firepower level, such as 17 degrees. Then, the actual opening angle of the first flap is obtained in real time through a Hall sensor. For example, 16.5 degrees.

[0094] The controller calculates the angle deviation between the actual opening angle and the target opening angle: .

[0095] Based on the sign and magnitude of the angular deviation, the controller generates corresponding drive correction signals. These drive correction signals include positive drive signals and negative drive signals.

[0096] If the actual opening angle is less than the target opening angle (i.e., the angle deviation is positive), a positive drive signal is generated, causing the motor to continue operating in the opening direction. If the actual opening angle is greater than the target opening angle (i.e., the angle deviation is negative), a reverse drive signal is generated, causing the motor to return to the closing direction. If the angle deviation is within the allowable error range (e.g., ±0.2 degrees), the drive stops.

[0097] A drive correction signal is sent to the drive motor of the first flap. The motor adjusts its rotation direction and timing according to the signal, continuously bringing the actual opening angle closer to the target opening angle, thus forming a closed-loop control. This process continues to ensure that the flap angle remains within a high-precision range. The closed-loop control of the second flap follows the same principle.

[0098] In this embodiment, the actual opening angle of the flap is obtained, the deviation between the actual angle and the target opening angle is calculated, and a drive correction signal is generated based on the deviation to drive the motor, so that the actual angle approaches the target angle. This closed-loop control scheme uses the position feedback of the Hall sensor to achieve precise positioning of the flap angle, overcoming the angle deviation problem caused by factors such as mechanical backlash and load changes in open-loop control, and ensuring the synchronicity of the left and right flap operation and the positioning accuracy for long-term use.

[0099] In one embodiment of this application, the control method for the range hood further includes: S010, in response to the power-on command, drive the first flap to move in the closing direction.

[0100] S020, detects the zero-position signal of the Hall sensor.

[0101] S030, in response to detecting the zero-position signal, determine the closing reference position of the first flap.

[0102] Specifically, this embodiment, based on embodiments S100 to S400, further introduces a power-on reset mechanism. Each time the range hood is powered on and started, a reference position calibration is required to eliminate mechanical assembly errors and cumulative position drift caused by long-term use.

[0103] Specifically, in response to a power-on command, the controller first drives the first flap to move in the closing direction. During operation, a Hall sensor continuously monitors the motor position signal. When the flap reaches the fully closed mechanical limit position, the Hall sensor generates a zero-position signal. The fully closed mechanical limit position is the 0-degree closed position. The zero-position signal is also called a zero pulse or index signal.

[0104] Once the controller detects the zero-position signal, it immediately confirms that the current position is the closing reference position of the flap and records this position as the zero point for subsequent angle control. Thereafter, all opening angle controls are performed incrementally with reference to this reference position.

[0105] Taking the first flap as an example. After reset, if it is necessary to control the first flap to open to 17 degrees, the controller sends a positive drive pulse based on the reference zero point, causing the motor to rotate forward from the 0-degree position corresponding to the number of pulses for 17 degrees. The second flap undergoes independent reset calibration in the same way.

[0106] The reset operation each time power is applied eliminates positioning errors caused by mechanical backlash, ensuring that the first and second flaps maintain a consistent reference zero point throughout their entire lifespan.

[0107] In this embodiment, in response to a power-on command, the flap is driven to move in the closing direction and the zero-position signal of the Hall sensor is detected. When the zero-position signal is detected, the closing reference position is determined. This power-on reset mechanism eliminates mechanical assembly errors and cumulative position drift caused by long-term use, providing a precise reference zero point for subsequent angle control and ensuring the control accuracy of the flap throughout its entire life cycle.

[0108] In one embodiment of this application, S400 includes, in response to at least two burners being in operation, controlling both the first and second flaps to open to an angle corresponding to the maximum firepower level of the burners in operation, including: S410 iterates through all burners in operation to determine the maximum heat setting.

[0109] S420, calculate the opening and closing angle of the flap based on the maximum firepower level.

[0110] S430, control both the first flap and the second flap to open to the flap opening angle.

[0111] Specifically, this embodiment defines the angle determination method for the corresponding working scenario of S400 in embodiments S100 to S400. When the controller determines that at least two burners are in working condition, it needs to determine which burner's firepower level should be used as the reference to control the tilting plate angle.

[0112] The controller first iterates through all the burners that are in operation, reads the current power level of each burner, and finds the maximum power level. For example, if the first burner's heat setting is level 4, the central burner's heat setting is level 8, and the second burner is off, then... There are 8 levels. For example, if three burners have power levels 3, 5, and 7 respectively, then... It has 7 gears.

[0113] Then, the controller calculates the flap opening angle based on the preset linear mapping relationship between the firepower level and the flap opening angle. The principle is the same as in embodiments S210 to S220, calculating the flap opening angle corresponding to the maximum firepower level. , For example, when the maximum firepower setting is level 8, When the maximum firepower setting is 10, 34 degrees is the maximum opening angle of the flap.

[0114] Finally, the controller controls both the first and second flaps to open to the specified opening angle. If the fire level of the working furnace changes during the flipping action, causing the maximum fire level to be updated, the controller will recalculate the angle and adjust the flipping position in real time.

[0115] For example, in the initial state, the first burner head has a power level of 4, the central burner head has a power level of 8, and the second burner head has a power level of 0, with both side flaps open to 27.2°. Then, the user adjusts the power level of the first burner head to 10, at which point the maximum power level becomes 10, and both side flaps automatically open to 34°.

[0116] In this embodiment, when at least two burners are in operation, the maximum heat level is determined by traversing all working burners. The opening angle of the flaps is calculated based on this maximum heat level, and both flaps are controlled to open to this angle. This "maximum heat priority" rule ensures that when multiple burners are cooking simultaneously, the flap angle can meet the smoke collection needs of the largest smoke source, avoiding the problem of insufficient smoke collection in high-smoke scenarios caused by selecting average or minimum heat.

[0117] This application also provides a range hood and stove linkage system.

[0118] For the sake of brevity, all hardware devices or hardware units mentioned in this application will be labeled in the embodiments of the range hood and stove linkage system described below, but will not be labeled in the embodiments of the aforementioned range hood control method, even if hardware devices or hardware units with the same name appear repeatedly in the embodiments of the aforementioned range hood control method.

[0119] like Figure 2 As shown, in one embodiment of this application, the range hood and cooktop linkage system includes a three-burner cooktop 10 and a range hood 20. The range hood 20 is arranged opposite to the three-burner cooktop 10.

[0120] The range hood 20 includes a first flap 210, a second flap 220, a first drive motor, a second drive motor, a first Hall sensor, a second Hall sensor, a smoke concentration sensor, a distance detection sensor, and a controller.

[0121] The first flap 210 is located on the left side of the air inlet of the range hood 20, and the second flap 220 is located on the right side of the air inlet of the range hood 20. Alternatively, the first flap 210 can be located on the right side of the air inlet of the range hood 20, and the second flap 220 on the left side. Regardless of the arrangement, the first flap 210 and the second flap 220 are respectively located on the left and right sides of the air inlet of the range hood 20.

[0122] The first drive motor is used to independently drive the opening and closing of the first flap 210. The second drive motor is used to independently drive the opening and closing of the second flap 220.

[0123] The first Hall sensor is used to detect the rotation angle of the first flap 210. The second Hall sensor is used to detect the rotation angle of the second flap 220.

[0124] A smoke concentration sensor is used to collect signals of oil fume concentration.

[0125] A distance detection sensor is used to detect the height of the pot placed on the three-burner stove 10.

[0126] The controller is electrically connected to the first drive motor, the second drive motor, the first Hall sensor, the second Hall sensor, the smoke concentration sensor, and the distance detection sensor, respectively. The controller is configured to acquire the burner operating status and firepower level of the three-burner cooktop 10. The controller is configured to execute the range hood control method mentioned in any of the foregoing embodiments.

[0127] Specifically, this embodiment provides a cooktop and range hood linkage system, which consists of two main parts: a three-burner cooktop 10 and a range hood 20, which are arranged opposite to each other. Optionally, the range hood 20 is located above the three-burner cooktop 10, such as... Figure 2 As shown.

[0128] The three-burner cooktop 10 has a first side burner 110, a central burner 120, and a second side burner 130 arranged from left to right on its panel. Each of the three burners can be ignited and its heat level can be adjusted independently, with heat levels typically ranging from 1 to 10. The cooktop has a built-in communication module, such as Bluetooth, Wi-Fi, or a dedicated radio frequency module, used to transmit the working status and heat level signals of each burner to the outside world in real time.

[0129] The range hood has a built-in communication module for linkage between the range hood and the cooktop. This module can communicate with the communication module built into the cooktop, allowing the range hood to obtain real-time information on the working status and heat level of each burner.

[0130] The range hood 20 has a side-suction structure, with a first flap 210 and a second flap 220 at the front of its air inlet. The two flaps can open and close independently. Each flap is driven by an independent drive motor. The first drive motor drives the first flap 210, and the second drive motor drives the second flap 220. Each drive motor is a DC geared motor with Hall effect position detection. The Hall sensor can provide real-time feedback on the motor's rotation angle, thereby calculating the actual opening and closing angle of the flap.

[0131] The range hood 20 also includes a smoke concentration sensor, which can be installed in the smoke intake area, such as behind the air inlet of the range hood, to collect real-time smoke concentration signals generated during cooking. It also includes a distance detection sensor, used to detect the distance from the top or rim of a pot placed on the burner to the bottom of the range hood. This distance detection sensor can be installed at the bottom of the range hood 20.

[0132] The controller is the core control unit of the range hood 20, and can be a single-chip microcomputer, microcontroller, or dedicated control chip. The controller is electrically connected to the first drive motor, the second drive motor, the first Hall sensor, the second Hall sensor, the smoke concentration sensor, and the distance detection sensor. In addition, the controller establishes a communication connection with the three-burner cooktop 10 through the range hood-cooktop linkage communication module to obtain the working status and firepower level signals of each burner sent by the cooktop.

[0133] The controller is configured to execute the range hood control method mentioned in any of the foregoing embodiments. Specifically, based on the acquired input information such as burner status and power level, smoke concentration signal, and cookware height signal, the controller generates control commands according to the range hood control method mentioned in any of the foregoing embodiments, driving the first and second drive motors to perform corresponding flap opening and closing actions, thereby achieving coordinated control of the range hood and cooktop.

[0134] In this embodiment, a stove-range hood linkage system is constructed, comprising a three-burner cooktop 10 and a range hood 20. The range hood 20 is equipped with independently driven first flap 210 and second flap 220, a drive motor with a Hall effect sensor, a smoke concentration sensor, a distance detection sensor, and a controller. The controller is configured to execute the range hood control method mentioned in any of the preceding embodiments. This system provides a complete physical platform for the aforementioned control methods at the hardware level. The coordinated configuration of the sensors and actuators enables functions such as smoke concentration compensation, cookware height compensation, and angle closed-loop control, forming an integrated stove-range hood linkage solution from perception to decision-making to execution.

[0135] The technical solutions described in the above embodiments can operate independently. Of course, the technical solutions described in the above embodiments can be completely coupled into a complete cooking process. The technical solutions described in the above embodiments are described in series below to demonstrate the preferred embodiments of the present invention.

[0136] Assuming the user is cooking using a three-burner cooktop, the range hood 20 is in standby mode. The user first connects the range hood 20 to the power supply. In response to the power-on command, the controller drives the first and second flaps to rotate in the closing direction, detecting the zero-position signal from their respective Hall sensors to determine the 0° closing reference position of each flap, thus eliminating mechanical clearance errors. This is part S010 to S030.

[0137] The user then lights the first burner, setting the heat level to 4. The cooktop sends the operating status of the first burner, the heat level to 4, and the off status of the central burner and the second burner to the range hood controller via the range hood-cooktop linkage communication module. After receiving the above information (claim 1), the controller determines that only one of the first and second burners is in operation, because it detects that only the first burner is working. This is part of S100.

[0138] Therefore, based on the preset linear mapping relationship, the opening and closing angle of the first flap is calculated. The controller controls the second flap to remain closed. This is part S210 to S220. Because it is coupled with S110 to S150, the opening and closing angle of the first flap, 13.6 degrees, serves as the base angle in S130. Simultaneously, the controller detects the current oil fume concentration using a smoke concentration sensor. Assuming the current oil fume concentration is within the normal range... Located at 0.8 and 1.2 Between, the oil fume compensation coefficient Take 1.0. This is part of S110, S121 to S124. Next, execute S140 and S150, and the compensated target angle is still 13.6°. The controller uses this 13.6° as the angle at which the first flap opens.

[0139] During the flap opening process, the controller obtains the actual angle in real time through a Hall sensor, compares it with the target angle, and corrects the drive signal in a closed loop to ensure that the first flap accurately reaches 13.6°. This part is S510 to S530.

[0140] The user then placed a stockpot on the central stovetop, the stockpot being taller than the standard height. This is S160.

[0141] The user lights the central burner and sets the heat level to 6, while simultaneously adjusting the heat level of the left burner to 3. At this point, the cooktop sends the new burner status (first burner is active, central burner is active, second burner is off) and heat level (first burner at level 3, central burner at level 6, second burner at level 0) to the controller. The controller determines that at least two burners are active. The process then jumps to S400.

[0142] The maximum firepower level is determined to be level 6 after traversing the working burner heads. The controller calculates the flap opening angle to be 20.4 degrees based on a linear mapping relationship. This is part S410 to S430.

[0143] At the same time, the distance detection sensor detects the cookware height signal and obtains the current cookware height. ,because > The controller determines the gear compensation value. The original 6-speed power setting plus The compensated firepower level is then obtained as level 5. This compensated firepower level replaces the original firepower level and is used for subsequent calculations. This is part S160 to S190.

[0144] However, since the maximum heat level 6 is used as the benchmark in this scenario, the effect of the cookware compensation is that if the user adjusts the heat of the central burner to a lower level, the height of the cookware will cause the equivalent heat level to be further reduced, thereby adjusting the angle of the flip plate.

[0145] The controller also detects the current concentration of cooking fumes using a smoke concentration sensor. Assuming the current smoke concentration is high, i.e. >1.2 Oil fume compensation coefficient Take 1.1. This involves going through S121 to S124 again. The controller uses the 20.4-degree flap opening angle corresponding to the maximum firepower level of 6 as the base angle, and then... 20.4° and The product of 1.1 generates the compensated target angle. The angle is 22.44°, and this is step S140. Finally, this angle of 22.44° is used as the control angle for opening the dual-side flaps. This is step S150.

[0146] The controller controls the left and right flaps to open synchronously to 22.44°, and continuously performs closed-loop angle correction during the opening process, which means that S510 to S530 needs to be executed again.

[0147] After the user finishes cooking and turns off all burners, the cooktop sends a shutdown signal to the controller. The controller, determining that no burners are in operation, controls the double-sided flaps to move in the closing direction until the Hall sensor detects a zero-position signal, at which point the double-sided flaps return to the 0° closed position.

[0148] As can be seen from the above-described sequential process, the technical solutions of each embodiment can be coupled and work together in the actual control process. Power-on reset provides a reference, burner status acquisition and scene judgment determine the basic control strategy, cookware height compensation corrects the fire level, linear mapping calculates the basic angle, oil fume concentration compensation corrects the target angle, closed-loop angle correction ensures accurate angle execution, and synchronous control ensures bilateral symmetry when both flaps need to be opened simultaneously. This achieves efficient, precise, and adaptive linkage control between the three-burner stove and the double-flap range hood.

[0149] like Figure 2 As shown, Figure 2 This is a schematic diagram of a range hood and stove linkage system provided in one embodiment of this application. Figure 2 This also shows the linkage state of the range hood and stove when both the first and second flaps are closed, i.e., at 0 degrees Celsius. At this time, all three burners are in the off state.

[0150] like Figure 3 As shown, Figure 3This is a diagram showing the linkage state of a range hood and a stove when only the first burner head is ignited, after implementing a control method for a range hood provided in an embodiment of this application.

[0151] like Figure 4 As shown, Figure 4 This is a diagram showing the linkage state of a range hood and a stove when only the second burner head is ignited, after implementing a control method for a range hood provided in an embodiment of this application.

[0152] like Figure 5 As shown, Figure 5 This is a diagram showing the linkage state of a range hood and a stove when at least two burners are ignited, after implementing a control method for a range hood provided in an embodiment of this application.

[0153] The technical features of the above embodiments can be combined arbitrarily, and the execution order of the method steps is not restricted. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0154] The embodiments described above are merely illustrative of several implementation methods of this application, and while the descriptions are specific and detailed, they should not be construed as limiting the scope of this patent application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application. Therefore, the protection scope of this application should be determined by the appended claims.

Claims

1. A control method for a range hood, characterized in that, A control method for a range hood comprising a first flap and a second flap includes: Obtain the working status and firepower level of the first burner, the central burner, and the second burner in a three-burner stove; In response to the fact that only one of the first and second burners is in working condition, the flap corresponding to the burner in working condition is controlled to open to an angle corresponding to the fire level of the burner in working condition, and the other flap is controlled to remain closed. In response to the fact that only the central burner is in working condition, the first and second flaps are both opened to an angle corresponding to the firepower level of the central burner. In response to at least two burners being in operation, the first and second flaps are controlled to open to an angle corresponding to the maximum firepower level of the burner in operation.

2. The control method for a range hood according to claim 1, characterized in that, Also includes: Acquire the oil fume concentration signal; The oil fume compensation coefficient is determined based on the oil fume concentration signal; Determine the basic angle based on the stated firepower level; The compensated target angle is generated by multiplying the base angle by the oil fume compensation coefficient. The compensated target angle is used as the angle for controlling the opening of the flap.

3. The control method for a range hood according to claim 2, characterized in that, Determining the oil fume compensation coefficient based on the oil fume concentration signal includes: The current oil fume concentration is determined based on the oil fume concentration signal; In response to the current oil fume concentration being greater than a first concentration threshold, the oil fume compensation coefficient is determined as the first coefficient; In response to the current oil fume concentration being less than the second concentration threshold, the oil fume compensation coefficient is determined as the second coefficient; In response to the current oil fume concentration being greater than or equal to the second concentration threshold and less than or equal to the first concentration threshold, the oil fume compensation coefficient is determined as the third coefficient.

4. The control method for a range hood according to claim 1, characterized in that, Also includes: Obtain the height signal of the pot set on the three-burner stove; The gear compensation value is determined based on the comparison between the altitude signal and the reference altitude value. The compensated firepower level is generated based on the sum of the firepower level and the level compensation value. Replace the obtained firepower level with the compensated firepower level.

5. The control method for a range hood according to claim 1, characterized in that, The response to only one of the first and second burners being in operation, controlling the flap corresponding to the burner in operation to open to an angle corresponding to the firepower level of the burner in operation, and controlling the other flap to remain closed, includes: In response to the fact that only one of the first and second burners is in operation, the firepower level of the burner in operation is obtained; According to a preset linear mapping relationship, the firepower level of the burner head in operation is converted into the opening and closing angle of the flap.

6. The control method for a range hood according to claim 1, characterized in that, The response that only the central burner is in operation, controlling both the first and second flaps to open to an angle corresponding to the firepower level of the central burner, includes: Obtain the firepower level of the central burner; The first and second flaps are controlled to open synchronously to the same angle corresponding to the firepower level of the central burner.

7. The control method for a range hood according to claim 1, characterized in that, Also includes: Obtain the actual opening angle of the first flap; Calculate the angular deviation between the actual opening angle and the target opening angle; A drive correction signal is generated based on the angle deviation, and the motor of the first flap is driven so that the actual opening angle approaches the target opening angle.

8. The control method for a range hood according to claim 1, characterized in that, Also includes: In response to the power-on command, the first flap is driven to rotate in the closing direction; Detect the zero-position signal of the Hall sensor; In response to the detection of the zero-position signal, the closing reference position of the first flap is determined.

9. The control method for a range hood according to claim 1, characterized in that, The response to at least two burners being in operation, controlling both the first and second flaps to open to an angle corresponding to the maximum firepower level of the burners in operation, includes: Iterate through all burners that are in operation to determine the maximum heat setting; Calculate the opening and closing angle of the flap based on the maximum firepower level; Control both the first flap and the second flap to open to the flap opening angle.

10. A range hood and stove linkage system, characterized in that, include: Three-burner stove; A range hood is disposed opposite to the three-burner cooktop; the range hood is configured to perform the control method for a range hood as described in any one of claims 1 to 9.

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