Control method and device of range hood and storage medium
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- NINGBO FOTILE KITCHEN WARE CO LTD
- Filing Date
- 2024-11-28
- Publication Date
- 2026-05-29
Smart Images
Figure CN122107424A_ABST
Abstract
Description
Technical Field
[0001] This application belongs to the field of household appliance control, and in particular relates to a control method, device and storage medium for a range hood. Background Technology
[0002] Range hoods use an internal fan to drive the fan blades, which generate airflow and create a negative pressure zone at the air inlet, thus quickly drawing in cooking fumes.
[0003] In actual use, it's common for one side of the cooktop to have a higher concentration of cooking fumes than the other, creating an imbalance. To ensure effective fume extraction, traditional solutions often involve increasing the fan speed inside the range hood. However, for the side with less fume, increasing the fan speed can lead to excessive airflow and waste. Furthermore, increased fan speed also increases the noise level of the range hood, negatively impacting the user's cooking experience.
[0004] Therefore, given the uneven distribution of oil fumes on both sides of the stove, how to ensure the effective smoke extraction of the range hood while avoiding wasted airflow is a pressing technical problem that needs to be solved. Summary of the Invention
[0005] This application provides a control method, device, and storage medium for a range hood, which can ensure the smoke extraction effect of the range hood while avoiding wasted air volume when the oil fumes generated on both sides of the stove are unbalanced.
[0006] On one hand, this application provides a control method for a range hood. The method is applied to a range hood including a flap and an air inlet. The flap is rotatably mounted on the main body of the range hood to open or close the air inlet. The flap includes a first flap and a second flap, which are arranged side-by-side. The method includes:
[0007] The first oil fume concentration at the air inlet on the side where the first flap is located and the second oil fume concentration at the air inlet on the side where the second flap is located are obtained.
[0008] Based on the first oil fume concentration and the second oil fume concentration, the working state of the range hood is determined, and the target flap is determined from the first flap and the second flap.
[0009] If the range hood is in a single-sided strong suction mode, the target opening and closing angle corresponding to the concentration difference between the first oil fume concentration and the second oil fume concentration is determined according to a preset mapping relationship; the preset mapping relationship represents the correspondence between the concentration difference between the first oil fume concentration and the second oil fume concentration and the opening and closing angle of the target flap.
[0010] Control the target flap to rotate outward to the target opening / closing angle.
[0011] In one exemplary embodiment, determining the operating state of the range hood based on the first oil fume concentration and the second oil fume concentration includes:
[0012] Obtain the concentration difference between the first oil fume concentration and the second oil fume concentration;
[0013] If the concentration difference is greater than or equal to the first difference threshold, the range hood is determined to be in a single-sided strong suction working state.
[0014] In one exemplary embodiment, the process of establishing the preset mapping relationship includes:
[0015] Multiple preset concentration differences are obtained under unilateral strong adsorption working state, and the maximum value among the multiple preset concentration differences is determined as the second difference threshold; the second difference threshold is greater than the first difference threshold;
[0016] The termination opening and closing angle is determined based on the preset flow rate increase rate; the termination opening and closing angle is the preset opening and closing angle corresponding to the second difference threshold.
[0017] The first difference threshold corresponds to the starting opening angle, and the second difference threshold corresponds to the ending opening angle. A correspondence between the concentration difference and the opening angle is established as the preset mapping relationship.
[0018] In one exemplary embodiment, determining the termination opening / closing angle based on a preset flow rate increase includes:
[0019] Determine multiple different preset opening and closing angles;
[0020] For each preset opening angle, the rate of change of the air inlet area is determined based on the preset opening angle;
[0021] The velocity increase rate is determined based on the rate of change of the air inlet area.
[0022] Establish a correspondence between preset opening and closing angles and flow rate improvement rates based on each preset opening and closing angle and the corresponding flow rate improvement rate.
[0023] Based on the aforementioned correspondence, the termination opening / closing angle is determined according to the preset flow rate increase rate.
[0024] In one exemplary embodiment, before determining the concentration difference between the first oil fume concentration and the second oil fume concentration, if the first oil fume concentration is greater than or equal to the second oil fume concentration, the method further includes:
[0025] Determine whether the concentration of the first oil fume is greater than or equal to a preset concentration threshold;
[0026] If the first oil fume concentration is greater than or equal to the preset concentration threshold, determine whether the second oil fume concentration is greater than or equal to the preset concentration threshold;
[0027] If the second oil fume concentration is greater than or equal to the preset concentration threshold, the concentration difference between the first oil fume concentration and the second oil fume concentration is determined.
[0028] In one exemplary embodiment, the method further includes:
[0029] If the second oil fume concentration is less than the preset concentration threshold, it is determined that the range hood is in a single-sided working state;
[0030] Control the first flap to rotate inward to open the air inlet on the side where the first flap is located, and control the second flap to rotate outward to close the air inlet on the side where the second flap is located.
[0031] In one exemplary embodiment, the method further includes:
[0032] If the first oil fume concentration is less than the preset concentration threshold, it is determined that the range hood is in a non-working state;
[0033] If the concentration difference between the first oil fume concentration and the second oil fume concentration is less than the first difference threshold, the range hood is determined to be in normal working condition.
[0034] If the range hood is in a non-working state or a normal working state, control the first flap and the second flap to rotate inward to open the air inlet.
[0035] On the other hand, this application also provides a control device for a range hood, characterized in that it is applied to a range hood, the range hood including a flap and an air inlet, the flap being rotatably mounted on the main body of the range hood to open or close the air inlet, the flap including a first flap and a second flap, the first flap and the second flap being arranged side by side, the device including:
[0036] The acquisition module is used to acquire the first oil fume concentration at the air inlet on the side where the first flap is located and to acquire the second oil fume concentration at the air inlet on the side where the second flap is located.
[0037] The working status determination module is used to determine the working status of the range hood based on the first oil fume concentration and the second oil fume concentration, and to determine the target flap from the first flap and the second flap.
[0038] The target opening / closing angle determination module is used to determine the target opening / closing angle corresponding to the concentration difference between the first oil fume concentration and the second oil fume concentration according to a preset mapping relationship if the range hood is in a single-sided strong suction working state; the preset mapping relationship represents the correspondence between the concentration difference between the first oil fume concentration and the second oil fume concentration and the opening / closing angle of the target flap.
[0039] The control rotation module is used to control the target flap to rotate outward to the target opening and closing angle.
[0040] On the other hand, this application also provides an electronic device, which includes a processor and a memory, wherein the memory stores at least one instruction or at least one program, and the at least one instruction or the at least one program is loaded and executed by the processor to implement the control method of the range hood as described above.
[0041] On the other hand, this application also provides a computer storage medium storing at least one instruction or at least one program, which is loaded and executed by a processor to implement the control method of the range hood as described above.
[0042] On the other hand, this application also provides a computer program product or computer program that includes computer instructions stored in a computer-readable storage medium. A processor of a computer device reads the computer instructions from the computer-readable storage medium and executes the computer instructions, causing the computer device to perform the control method for the range hood as described above.
[0043] The control method for the range hood provided in this application has the following technical effects:
[0044] In this embodiment, by setting a first flap and a second flap in the range hood, the first oil fume concentration at the air inlet on the side where the first flap is located and the second oil fume concentration at the air inlet on the side where the second flap is located are obtained. Based on the first and second oil fume concentrations, the working state of the range hood is determined, and a target flap is selected from the first and second flaps. If the range hood is in a unilateral strong suction working state, the corresponding target opening and closing angle is determined according to the concentration difference between the first and second oil fume concentrations and a preset mapping relationship. Then, the target flap is controlled to rotate outward to the target opening and closing angle. Thus, in the case of an imbalance of oil fumes generated on both sides of the stove, the flap angle is adjusted in a targeted manner based on the concentration difference of oil fumes. Compared with the traditional solution of increasing the air volume to meet the suction effect on the side with a larger oil fume concentration, the solution provided in this application can improve the airflow rate of the range hood without increasing the air volume when the oil fumes on one side of the stove increase, thus avoiding the situation of smoke leakage and smoke escape. While ensuring the suction effect of the range hood, it can also avoid the waste of air volume. Attached Figure Description
[0045] To more clearly illustrate the technical solutions in the embodiments of this application, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.
[0046] Figure 1 This is an application environment diagram of the control method for a range hood provided in the embodiments of this application.
[0047] Figure 2 This is a flowchart illustrating the control method for a range hood provided in an embodiment of this application.
[0048] Figure 3 This is a flowchart illustrating the process of determining the working state of a range hood, as provided in an embodiment of this application.
[0049] Figure 4 This is a schematic diagram of the process for establishing a preset mapping relationship provided in the embodiments of this application.
[0050] Figure 5 This is a schematic diagram of the process for determining the termination opening / closing angle provided in an embodiment of this application.
[0051] Figure 6 This is a flowchart illustrating the flap control in non-working and normal working states provided in the embodiments of this application.
[0052] Figure 7 This is a schematic diagram of the control device for the range hood provided in the embodiments of this application.
[0053] Figure 8 This is a hardware structure block diagram of a server for a range hood control method provided in an embodiment of this application. Detailed Implementation
[0054] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this application.
[0055] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this application 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 this application 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 non-exclusive inclusion; for example, a process, method, system, product, or server 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 devices.
[0056] Figure 1 This is an application environment diagram of the control method for a range hood provided in the embodiments of this application.
[0057] The control method for a range hood provided in this application can be applied to range hoods. Figure 1 Taking the range hood shown as an example, the range hood may include a decorative cover 1, a main unit 2, a light 3, a control panel 4, a smoke baffle 5, a flap 6, a cavity 7, and an oil cup 8. The range hood also includes an air inlet for drawing in cooking fumes. The air inlet is located above the flap 6, which is rotatably mounted on the main body of the range hood to open or close the air inlet. The flap includes a first flap and a second flap, which are arranged side-by-side. Figure 1 As shown, the first and second flaps are arranged side by side below the air inlet.
[0058] In one embodiment, the first and second flaps can be opened and closed by flipping upwards. Specifically, a pivot is provided at the bottom of both flaps, and a push rod can be provided inside the cavity 7 to push the flap 6 outwards to close the air inlet, or to pull the flap 6 inwards to open the air inlet. It should be noted that a pivot can also be provided at the top of the first and second flaps, allowing them to be opened and closed by flipping downwards.
[0059] In this embodiment of the application, the flow rate of the range hood can be adjusted by controlling the opening and closing of the flap 6.
[0060] It should be noted that the range hood may also include a first oil fume sensor and a second oil fume sensor, used to collect the oil fume concentration on both sides of the range hood.
[0061] It should be understood that Figure 1 The structure of the range hood shown is merely an example, and the control method for the range hood provided in this application does not limit the specific structure of the range hood.
[0062] Figure 2 This is a flowchart illustrating the control method for a range hood provided in an embodiment of this application.
[0063] S201: Obtain the first oil fume concentration at the air inlet on the side where the first flap is located and obtain the second oil fume concentration at the air inlet on the side where the second flap is located.
[0064] A first oil fume sensor can be installed at the air inlet on the side where the first flap is located, and the first oil fume concentration can be collected by the first oil fume sensor;
[0065] A second oil fume sensor can be installed at the air inlet on the side where the second flap is located, and the second oil fume concentration can be collected by the second oil fume sensor.
[0066] The first flap and the second flap can correspond to the left and right air inlets of the range hood, respectively, and the first oil fume concentration and the second oil fume concentration can correspond to the oil fume concentration at the left and right air inlets of the range hood, respectively.
[0067] When the range hood is turned on, both the first and second flaps can rotate inward to fully open the air inlet, waiting for the fan to run and draw in the cooking fumes. When the range hood is turned off, both the first and second flaps can rotate outward to fully close the air inlet, preventing the cooking fumes from flowing back in.
[0068] In one example, suppose the left side of the stove is used for stir-frying and the right side is used for stewing. Both sides will produce fumes, but the fumes produced by stir-frying on the left side will be significantly more than those on the right. Therefore, in this embodiment, the concentration of fumes on both sides is collected separately, and the opening and closing angles of the two flaps are controlled separately to maximize resource conservation and reduce energy consumption while ensuring smoke extraction effect.
[0069] S203: Determine the working state of the range hood based on the first oil fume concentration and the second oil fume concentration, and identify the target flap from the first flap and the second flap;
[0070] In this embodiment, the working state of the fume extraction system can be categorized into single-sided working state, single-sided strong suction working state, normal working state, and non-working state based on the first and second fume concentrations. The single-sided working state corresponds to cooking on only one side of the stove; the single-sided strong suction working state corresponds to cooking on both sides of the stove with a significant difference in fume concentration between the two sides; the normal working state corresponds to cooking on both sides of the stove with a small difference in fume concentration between the two sides; and the non-working state corresponds to no cooking on either side of the stove.
[0071] Depending on the different operating states of the range hood, it can be determined whether the first or second flap needs to be adjusted accordingly. The flap that requires adjustment is designated as the target flap. The target flap can be either the first or the second flap, or one of the first or the second flap.
[0072] S205: If the range hood is in a single-sided strong suction working state, the target opening and closing angle corresponding to the concentration difference between the first oil fume concentration and the second oil fume concentration is determined according to a preset mapping relationship; the preset mapping relationship represents the correspondence between the concentration difference between the first oil fume concentration and the second oil fume concentration and the target opening and closing angle of the flap.
[0073] If the range hood is in unilateral high-suction mode, meaning there is an imbalance in the concentration of cooking fumes on both sides of the cooktop, the side with higher fume concentration can be considered the high-suction side, and the side with lower fume concentration can be considered the low-suction side. In this case, the target flap is the flap corresponding to the low-suction side. In this embodiment, the opening angle of the flap corresponding to the low-suction side is adjusted according to the concentration difference between the first and second fume concentrations, thus reducing the air inlet area on the low-suction side. When the range hood speed remains constant, the total air volume remains constant. With the air inlet area on the low-suction side reduced, the air volume will shift to the high-suction side, allowing the high-suction side to draw in cooking fumes more quickly.
[0074] It is understandable that, taking the fully opened flap as the starting angle, the greater the concentration difference, the greater the opening angle of the target flap, which in turn makes the air inlet area on the side where the target flap is located smaller. Thus, a correspondence between the concentration difference and the opening angle of the target flap can be established as a preset mapping relationship.
[0075] In one example, assume the flap's opening and closing angle ranges from 0 to θ. Max Specifically, when the opening angle is 0 degrees, the flap rotates to its maximum angle towards the inside of the range hood to fully open the air inlet; when the opening angle is θ... Max At this time, the flap rotates to its maximum angle to the outside of the range hood to completely close the air inlet.
[0076] S207: Control the target flap to rotate outward to the target opening / closing angle.
[0077] The target flap rotates outwards towards the target opening angle of the range hood, while the other flap remains fully open. The air inlet area on the non-strong suction side corresponding to the target flap decreases, and the airflow at that side also decreases. With the total airflow remaining constant, the airflow at the air inlet on the strong suction side corresponding to the other flap increases, allowing the strong suction side to draw in fumes more quickly. Additionally, because the overall air inlet area of the range hood decreases, the overall airflow velocity of the range hood also increases, thereby improving smoke extraction efficiency.
[0078] In this embodiment, by setting a first flap and a second flap in the range hood, the first oil fume concentration at the air inlet on the side where the first flap is located and the second oil fume concentration at the air inlet on the side where the second flap is located are obtained. Based on the first and second oil fume concentrations, the working state of the range hood is determined, and a target flap is selected from the first and second flaps. If the range hood is in a unilateral strong suction working state, the corresponding target opening and closing angle is determined according to the concentration difference between the first and second oil fume concentrations and a preset mapping relationship. Then, the target flap is controlled to rotate outward to the target opening and closing angle. Thus, in the case of an imbalance of oil fumes generated on both sides of the stove, the flap angle is adjusted in a targeted manner based on the concentration difference of oil fumes. Compared with the traditional solution of increasing the air volume to meet the suction effect on the side with a larger oil fume concentration, the solution provided in this application can improve the airflow rate of the range hood without increasing the air volume when the oil fumes on one side of the stove increase, thus avoiding the situation of smoke leakage and smoke escape. While ensuring the suction effect of the range hood, it can also avoid the waste of air volume.
[0079] Figure 3 This is a flowchart illustrating the process of determining the working state of a range hood, as provided in an embodiment of this application. Figure 3 It can be seen as Figure 2 A specific example of the method shown.
[0080] In one embodiment, determining the operating state of the range hood based on the first oil fume concentration and the second oil fume concentration may include:
[0081] S301: Obtain the concentration difference between the first oil fume concentration and the second oil fume concentration;
[0082] The concentration difference can be the absolute value of the difference between the first and second oil fume concentrations.
[0083] S303: If the concentration difference is greater than or equal to the first difference threshold, the range hood is determined to be in a single-sided strong suction working state.
[0084] The first difference threshold can be a fraction of the maximum range of the fume sensor. For example, suppose the range of the fume sensor is 0 to a. Max Then the first difference threshold can be If the first oil fume concentration is a1 and the second oil fume concentration is a2, that is to say, when At this time, it can be determined that the range hood is in a unilateral strong suction state, and the side with strong suction is the side where the flap corresponding to the first oil fume concentration is located. This application determines the corresponding working state of the range hood based on the first difference threshold, so that the opening and closing angle of the flap can be adjusted in a targeted manner according to the real-time oil fume concentration difference, making the control more accurate.
[0085] It should be noted that before step S301, it is first necessary to determine whether oil fumes are generated on both sides of the stove. Specifically, before determining the concentration difference between the first and second oil fume concentrations, if the first oil fume concentration is greater than or equal to the second oil fume concentration, that is, if the first oil fume concentration is the larger of the two collected oil fume concentrations and the second oil fume concentration is the smaller of the two collected oil fume concentrations, the method further includes:
[0086] S305: Determine whether the first oil fume concentration is greater than or equal to the preset concentration threshold;
[0087] The preset concentration threshold can be a fraction of the maximum range of the fume sensor. For example, suppose the range of the fume sensor is 0 to a. Max Then the preset concentration threshold can be The preset concentration threshold is used to determine whether there is oil fume at the air inlet.
[0088] S307: If the first oil fume concentration is greater than or equal to the preset concentration threshold, determine whether the second oil fume concentration is greater than or equal to the preset concentration threshold.
[0089] If the first oil fume concentration is greater than or equal to the preset concentration threshold, that is... If so, it means that oil fumes were detected at the air inlet on the side of the flap corresponding to the first oil fume concentration.
[0090] S309: If the second oil fume concentration is greater than or equal to the preset concentration threshold, determine the concentration difference between the first oil fume concentration and the second oil fume concentration.
[0091] Next, the second oil fume concentration is compared with the preset concentration threshold, i.e., a judgment is made. If so, it means that fumes were also detected at the air inlet on the side of the flap corresponding to the second fume concentration. At this point, it can be determined that fumes are generated on both sides of the stove, and the range hood needs to open both air inlets to ensure that fumes from both sides can be drawn in. Furthermore, the concentration difference between the first and second fume concentrations can be calculated to determine whether the range hood needs to be in unilateral strong suction mode. This accurately and quickly determines the operating state and comprehensively covers all possible situations regarding fume concentration, making the control more comprehensive.
[0092] Figure 4 This is a schematic diagram of the process for establishing a preset mapping relationship provided in the embodiments of this application.
[0093] Specifically, the process of establishing a pre-defined mapping relationship may include:
[0094] S401: Obtain multiple preset concentration differences under unilateral strong adsorption working state, and determine the maximum value among the multiple preset concentration differences as the second difference threshold;
[0095] Among them, the second difference threshold is greater than the first difference threshold;
[0096] The establishment of the preset mapping relationship first requires pre-determining multiple preset concentration difference values under the unilateral strong adsorption working state to obtain the range of concentration difference values on both sides, and then establishing the preset mapping relationship based on the maximum value of the concentration difference values on both sides.
[0097] The second difference threshold can be a fraction of the maximum range of the fume sensor. For example, suppose the range of the fume sensor is 0 to a. Max Based on multiple predetermined concentration differences, the second difference threshold can be set to... It should be noted that the second difference threshold is obtained based on actual experimental measurements, and this application does not limit the specific value of the second difference threshold.
[0098] S403: Determine the termination opening / closing angle based on the preset flow rate increase rate;
[0099] Wherein, the termination opening and closing angle is the preset opening and closing angle corresponding to the second difference threshold;
[0100] In this embodiment, the flow rate increase rate is the flow rate increase rate of the target flap at its maximum opening and closing angle under unilateral strong suction. The determined termination opening and closing angle is also different for different preset flow rate increase rates.
[0101] The airflow velocity of a range hood is the ratio between the total air volume of the range hood and the area of the air inlet. The airflow velocity increase rate represents the rate at which the airflow velocity increases after a change in the opening angle. When the total air volume remains constant, the airflow velocity increase rate is negatively correlated with the change in the air inlet area. Since the opening angle is negatively correlated with the air inlet area, it can be inferred that the airflow velocity increase rate is positively correlated with the final opening angle.
[0102] The termination opening / closing angle can be determined according to the preset relationship between the opening / closing angle and the flow rate increase rate. For example, when the preset flow rate increase rate is 125%, the termination opening / closing angle can be determined according to the relationship. When the preset flow rate increase rate is 175%, according to the corresponding relationship, the termination opening and closing angle can be...
[0103]
[0104] S405: The first difference threshold corresponds to the starting opening and closing angle, and the second difference threshold corresponds to the ending opening and closing angle. The correspondence between the concentration difference and the opening and closing angle is established as a preset mapping relationship.
[0105] Based on the positive correlation between a larger concentration difference and a larger opening angle, the first difference threshold can be mapped to the initial opening angle, and the second difference threshold to the final opening angle, establishing a pre-defined mapping relationship between concentration difference and opening angle. In one example, assuming the initial opening angle is 0, the first difference threshold is... The closing angle is The second difference threshold is Assuming the relationship between the opening angle and the concentration difference is a linear function, we can obtain the following formula:
[0106]
[0107] Where θ represents the opening and closing angle of the target flap, θ Max This indicates the angle at which the flap rotates outwards towards the outside of the range hood to completely close the air inlet. Max The value represents the maximum range of the oil fume sensor, a1 represents the first oil fume concentration, and a2 represents the second oil fume concentration.
[0108] It should be noted that the correspondence between the opening / closing angle and the concentration difference can also be other functional relationships, as long as the positive correlation condition is met. In this embodiment, by establishing a preset relationship, each opening / closing angle has a corresponding opening / closing angle during application, which is a continuous control method that makes the control more accurate and comprehensive.
[0109] Figure 5 This is a schematic diagram of the process for determining the termination opening / closing angle provided in an embodiment of this application.
[0110] In one embodiment, determining the termination opening / closing angle based on a preset flow rate increase can include:
[0111] S501: Determine multiple different preset opening and closing angles;
[0112] The preset opening angle is a custom maximum opening angle of the target flap under unilateral strong suction. The preset opening angle can be based on the maximum opening angle θ of the target flap. Max Settings, for example wait.
[0113] S503: For each preset opening angle, determine the rate of change of the air inlet area based on the preset opening angle;
[0114] In this embodiment, the air inlet is divided into an air inlet on the side where the first flap is located and an air inlet on the side where the second flap is located. Before adjusting the opening angle, since both air inlets are fully open, the total air inlet area of the range hood can be expressed by the following formula:
[0115] S = S1 + S2
[0116] Where S represents the total air inlet area, S1 represents the air inlet area on the side where the first flap is located, and S2 represents the air inlet area on the side where the second flap is located.
[0117] Assuming the height of the flap is h, and the area of the air inlet can be considered rectangular, then the original total air inlet area S and the total air inlet area S when the flap rotates under unilateral strong suction working conditions are... 单 It can be expressed as follows:
[0118] S = 2 * L 长 *L 宽
[0119] S 单 =L 长 *h*sin(θ Max -θ)+L 长 *L 宽
[0120] Among them, L 长 L represents the length of the air inlet. 宽 The original width of the air inlet is represented by h, the height of the flap is represented by θ. Max θ represents the maximum opening angle of the flap, and θ represents the adjusted opening angle of the flap.
[0121] S505: Determine the flow velocity increase rate based on the inlet area change rate;
[0122] The inlet area change rate can be the ratio of the total inlet area under unilateral strong suction operation to the original total inlet area. The flow velocity can be the ratio of the total air volume to the total inlet area; when the total air volume remains constant, the flow velocity increase rate is equal to 1 divided by the inlet area change rate.
[0123] For each preset opening and closing angle, the corresponding flow rate improvement rate can be obtained.
[0124] In one example, let's assume the preset opening angle is... Therefore, the rate of change of the air inlet area can be expressed by the following formula:
[0125]
[0126] The corresponding flow rate increase can be expressed by the following formula:
[0127]
[0128] Where ΔS represents the rate of change of the inlet area, ΔV represents the flow rate, and L 宽 The original width of the air inlet is represented by h, the height of the flap is represented by θ. Max This indicates the maximum opening angle of the flap.
[0129] S507: Establish the correspondence between preset opening and closing angles and flow rate improvement rates based on each preset opening and closing angle and the corresponding flow rate improvement rate.
[0130] Because in step S507, L 宽 h, θ Max Since all of these are constants, a corresponding flow rate increase can be obtained for each preset opening and closing angle. Therefore, a correspondence between the preset opening and closing angle and the flow rate increase can be established so that in step S403, the termination opening and closing angle can be determined based on the preset flow rate increase.
[0131] S509: Based on the above correspondence, determine the termination opening and closing angle according to the preset flow rate increase rate.
[0132] It should be noted that the flow rate increase rate and the preset flow rate increase rate in the above method are the maximum flow rate increase rate that can be achieved when the preset opening and closing angle is the termination opening and closing angle.
[0133] The preset opening and closing angle will be used as the termination opening and closing angle according to step S405. Substituting the preset mapping relationship established in step S503 into the air inlet area under the single-sided strong suction working state, we can obtain the following formula:
[0134]
[0135] in, If the part is greater than 0, we can get It is clear that the concentration difference is less than the second difference threshold.
[0136] The corresponding flow velocity can be expressed as:
[0137]
[0138] Where V represents the flow velocity, Q represents the total air volume, and L represents the total air volume. 长 L represents the length of the air inlet. 宽 The original width of the air inlet is represented by h, the height of the flap is represented by θ. Max Indicates the maximum opening angle of the flap, a Max The value represents the maximum range of the oil fume sensor, a1 represents the first oil fume concentration, and a2 represents the second oil fume concentration.
[0139] When the value of a1-a2 is the first difference threshold, the flow rate is equal to the flow rate under normal operating conditions. At the second difference threshold, as the value of a1-a2 increases, the flow rate also increases, reaching its maximum value when a1-a2 is at the second difference threshold. Consequently, the flow rate increase rate also reaches its maximum value. Therefore, it can be seen that the upper limit of the flow rate increase rate is determined by the termination opening / closing angle. This application embodiment, by determining different termination opening / closing angles, can achieve different flow rate increase rates, thereby establishing a more accurate preset mapping relationship and further achieving more accurate opening / closing angle adjustment.
[0140] In one embodiment, the method further includes: if the second oil fume concentration is less than a preset concentration threshold, determining that the range hood is in a single-sided operating state; controlling the first flap to rotate inward to open the air inlet on the side where the first flap is located, and controlling the second flap to rotate outward to close the air inlet on the side where the second flap is located. This embodiment determines the single-sided operating state because oil fumes are only detected on one side at this time, so only the air inlet on one side needs to be opened, thereby maximizing the smoke extraction efficiency and avoiding waste of airflow.
[0141] Figure 6 This is a flowchart illustrating the flap control in non-working and normal working states according to an embodiment of this application. This embodiment will still use the example of a first oil fume concentration being greater than or equal to a second oil fume concentration for explanation.
[0142] S601: If the first oil fume concentration is less than the preset concentration threshold, the range hood is determined to be in a non-working state;
[0143] If the first concentration of oil fume is less than the preset concentration threshold, that is If so, it means that no oil fumes were detected at the air inlet on the side where the flap corresponding to the first oil fume concentration is located. The range hood does not need to suck in oil fumes, and the range hood only needs to be in a non-working state at this time.
[0144] S603: If the concentration difference between the first oil fume concentration and the second oil fume concentration is less than the first difference threshold, the range hood is determined to be in normal working condition.
[0145] If both the first and second oil fume concentrations are greater than or equal to a preset concentration threshold, and the concentration difference between the two is less than a first difference threshold... This indicates that the fumes on both sides are in a balanced state, and the fume extractor needs to be in normal working condition at this time.
[0146] S605: If the range hood is in a non-working state or a normal working state, control the first and second flaps to rotate inward to open the air inlet.
[0147] In either of the above states, simply rotate the first and second flaps inwards towards the inside of the range hood to fully open the air inlet.
[0148] This application embodiment determines the non-working state and the normal working state, and controls the air inlet to be open, thereby meeting the basic requirements for smoke extraction effect, avoiding smoke leakage and making the control more comprehensive.
[0149] As can be seen from the technical solutions provided in the embodiments of this application above, in these embodiments, by setting a first flap and a second flap in the range hood, the first oil fume concentration at the air inlet on the side where the first flap is located and the second oil fume concentration at the air inlet on the side where the second flap is located are obtained; based on the first oil fume concentration and the second oil fume concentration, the working state of the range hood is determined, and the target flap is determined from the first flap and the second flap; if the range hood is in a unilateral strong suction working state, the corresponding... The target opening angle is determined; then the target flap is controlled to rotate outward to the target opening angle. In the case of an imbalance of oil fumes generated on both sides of the stove, the flap angle is adjusted in a targeted manner based on the concentration difference of the oil fumes. Compared with the traditional solution of increasing the air volume to meet the smoke extraction effect on the side with a larger oil fume concentration, the solution provided in this application can improve the airflow of the range hood without increasing the air volume when the oil fumes increase on one side of the stove, thus avoiding smoke leakage and ensuring the smoke extraction effect of the range hood while also avoiding wasted air volume.
[0150] Figure 7 This is a schematic diagram of the control device for the range hood provided in the embodiments of this application.
[0151] It should be noted that the device 700 can be applied to a range hood, which includes a flap and an air inlet. The flap is rotatably mounted on the main body of the range hood to open or close the air inlet. The flap includes a first flap and a second flap, which are arranged side by side.
[0152] like Figure 7 As shown, the device 700 may include:
[0153] The acquisition module 701 is used to acquire the first oil fume concentration at the air inlet on the side where the first flap is located and to acquire the second oil fume concentration at the air inlet on the side where the second flap is located.
[0154] The working status determination module 703 is used to determine the working status of the range hood based on the first oil fume concentration and the second oil fume concentration, and to determine the target flap from the first flap and the second flap.
[0155] The target opening / closing angle determination module 705 is used to determine the target opening / closing angle corresponding to the concentration difference between the first oil fume concentration and the second oil fume concentration according to a preset mapping relationship if the range hood is in a single-sided strong suction working state. The preset mapping relationship represents the correspondence between the concentration difference between the first oil fume concentration and the second oil fume concentration and the opening / closing angle of the target flap.
[0156] The control rotation module 707 is used to control the target flap to rotate outward to the target opening and closing angle.
[0157] In some embodiments, the working status determination module may include:
[0158] The concentration difference acquisition submodule is used to acquire the concentration difference between the first oil fume concentration and the second oil fume concentration.
[0159] The single-sided strong suction working state determination submodule is used to determine that the range hood is in the single-sided strong suction working state if the concentration difference is greater than or equal to the first difference threshold.
[0160] In some embodiments, the device 700 may include:
[0161] The second difference threshold determination module is used to obtain multiple preset concentration differences under unilateral strong adsorption working state, and determine the maximum value among the multiple preset concentration differences as the second difference threshold; the second difference threshold is greater than the first difference threshold;
[0162] The termination opening / closing angle determination module is used to determine the termination opening / closing angle based on the preset flow rate increase rate; the termination opening / closing angle is the preset opening / closing angle corresponding to the second difference threshold.
[0163] The preset mapping relationship establishment module is used to establish a correspondence between the concentration difference and the opening and closing angle by assigning the first difference threshold to the starting opening and closing angle and the second difference threshold to the ending opening and closing angle.
[0164] In some embodiments, the termination opening / closing angle determination module may include:
[0165] The preset opening and closing angle determination submodule is used to determine multiple different preset opening and closing angles;
[0166] The inlet area change rate determination submodule is used to determine the inlet area change rate for each preset opening angle based on the preset opening angle.
[0167] The velocity increase rate determination submodule is used to determine the velocity increase rate based on the rate of change of the inlet area;
[0168] The correspondence determination submodule is used to establish the correspondence between preset opening and closing angles and flow rate improvement rates based on each preset opening and closing angle and the corresponding flow rate improvement rate.
[0169] The termination opening / closing angle determination submodule is used to determine the termination opening / closing angle according to the corresponding relationship and the preset flow rate increase rate.
[0170] In some embodiments, the device 700 may further include:
[0171] The first judgment module is used to determine whether the first oil fume concentration is greater than or equal to a preset concentration threshold.
[0172] The second judgment module is used to determine whether the second oil fume concentration is greater than or equal to the preset concentration threshold if the first oil fume concentration is greater than or equal to the preset concentration threshold.
[0173] The concentration difference determination module is used to determine the concentration difference between the first oil fume concentration and the second oil fume concentration if the second oil fume concentration is greater than or equal to a preset concentration threshold.
[0174] In some embodiments, the device 700 further includes:
[0175] The single-sided working state determination module is used to determine that the range hood is in a single-sided working state if the second oil fume concentration is less than a preset concentration threshold.
[0176] The flap control module is used to control the first flap to rotate inward to open the air inlet on the side where the first flap is located, and to control the second flap to rotate outward to close the air inlet on the side where the second flap is located.
[0177] In some embodiments, the device 700 further includes:
[0178] The non-working state determination module is used to determine that the range hood is in a non-working state if the first oil fume concentration is less than a preset concentration threshold.
[0179] The normal working state determination module is used to determine that the range hood is in normal working state if the concentration difference between the first oil fume concentration and the second oil fume concentration is less than the first difference threshold.
[0180] The flap control module is used to control the first flap and the second flap to rotate inward to open the air inlet when the range hood is in a non-working state or a normal working state.
[0181] The apparatus and method embodiments described herein are based on the same inventive concept.
[0182] This application provides an electronic device including a processor and a memory. The memory stores at least one instruction or at least one program, which is loaded and executed by the processor to implement the method provided in the above method embodiments.
[0183] Embodiments of this application also provide a computer storage medium, which can be disposed in a terminal to store at least one instruction or at least one program related to implementing a method as provided in the above method embodiments, wherein the at least one instruction or at least one program is loaded and executed by the processor to implement the method provided in the above method embodiments.
[0184] Embodiments of this application also provide a computer program product or computer program, which includes computer instructions stored in a computer-readable storage medium. A processor of a computer device reads the computer instructions from the computer-readable storage medium and executes the computer instructions, causing the computer device to perform the method provided in the above-described method embodiments.
[0185] Optionally, in this embodiment, the storage medium may be located at at least one of the multiple network servers in a computer network. Optionally, in this embodiment, the storage medium may include, but is not limited to, 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.
[0186] The memory described in this application embodiment can be used to store software programs and modules. The processor executes various functional applications and data processing by running the software programs and modules stored in the memory. The memory may mainly include a program storage area and a data storage area. The program storage area may store the operating system, applications required for the functions, etc.; the data storage area may store data created according to the use of the device, etc. In addition, the memory may include high-speed random access memory, and may also include non-volatile memory, such as at least one disk storage device, flash memory device, or other volatile solid-state storage device. Accordingly, the memory may also include a memory controller to provide the processor with access to the memory.
[0187] The methods provided in this application can be executed on mobile terminals, computer terminals, servers, or similar computing devices. Taking running on a server as an example... Figure 8 This is a hardware structure block diagram of a server for a range hood control method provided in an embodiment of this application. For example... Figure 8 As shown, the server 800 can vary significantly due to different configurations or performance. It may include one or more Central Processing Units (CPUs) 810 (CPUs 810 may include, but are not limited to, microprocessors (MCUs) or programmable logic devices (FPGAs), a memory 830 for storing data, and one or more storage media 820 (e.g., one or more mass storage devices) for storing application programs 823 or data 822. The memory 830 and storage media 820 may be temporary or persistent storage. The program stored in the storage media 820 may include one or more modules, each module may include a series of instruction operations on the server. Furthermore, the CPU 810 may be configured to communicate with the storage media 820 and execute the series of instruction operations stored in the storage media 820 on the server 800. Server 800 may also include one or more power supplies 860, one or more wired or wireless network interfaces 850, one or more input / output interfaces 840, and / or one or more operating systems 821, such as Windows Server™, Mac OS X™, Unix™, Linux™, FreeBSD™, etc.
[0188] The input / output interface 840 can be used to receive or send data via a network. Specific examples of the network described above may include a wireless network provided by the communication provider of server 800. In one example, the input / output interface 840 includes a network interface controller (NIC), which can connect to other network devices via a base station to communicate with the Internet. In another example, the input / output interface 840 may be a radio frequency (RF) module for wireless communication with the Internet.
[0189] Those skilled in the art will understand that Figure 8 The structure shown is for illustrative purposes only and does not limit the structure of the aforementioned electronic device. For example, server 800 may also include... Figure 8 The more or fewer components shown, or having the same Figure 8 The different configurations shown.
[0190] As can be seen from the embodiments of the control method, device, and storage medium for the range hood provided in this application, this application obtains the first oil fume concentration at the air inlet on the side where the first flap is located and the second oil fume concentration at the air inlet on the side where the second flap is located by setting a first flap and a second flap in the range hood; determines the working state of the range hood based on the first oil fume concentration and the second oil fume concentration, and identifies the target flap from the first flap and the second flap; if the range hood is in a unilateral strong suction working state, it determines the working state of the range hood according to the concentration difference between the first oil fume concentration and the second oil fume concentration, based on a preset mapping relationship. The target opening and closing angle is determined; then the target flap is controlled to rotate outward to the target opening and closing angle. In the case of an imbalance of oil fumes generated on both sides of the stove, the flap angle is adjusted in a targeted manner based on the concentration difference of the oil fumes. Compared with the traditional solution of increasing the air volume to meet the smoke extraction effect on the side with a larger oil fume concentration, the solution provided in this application can improve the airflow of the range hood without increasing the air volume when the oil fumes increase on one side of the stove, thus avoiding the situation of smoke leakage and smoke escape. While ensuring the smoke extraction effect of the range hood, it can also avoid the waste of air volume.
[0191] It should be noted that the order of the embodiments described above is merely for descriptive purposes and does not represent the superiority or inferiority of the embodiments. Furthermore, specific embodiments have been described above. Other embodiments are within the scope of the appended claims. In some cases, the actions or steps described in the claims can be performed in a different order than that shown in the embodiments and still achieve the desired result. Additionally, the processes depicted in the drawings do not necessarily require a specific or sequential order to achieve the desired result. In some embodiments, multitasking and parallel processing are also possible or may be advantageous.
[0192] The various embodiments in this specification are described in a progressive manner. Similar or identical parts between embodiments can be referred to mutually. Each embodiment focuses on describing the differences from other embodiments. In particular, the embodiments of apparatus, devices, and storage media are basically similar to the method embodiments, so the descriptions are relatively simple; relevant parts can be referred to the descriptions of the method embodiments.
[0193] Those skilled in the art will understand that all or part of the steps of the above embodiments can be implemented by hardware or by a program instructing related hardware. The program can be stored in a computer storage medium, such as a read-only memory, a disk, or an optical disk.
[0194] The above description is only a preferred embodiment of this application and is not intended to limit this application. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.
Claims
1. A control method for a range hood, characterized in that, An application is made to a range hood, the range hood including a flap and an air inlet, the flap being rotatably mounted on the main body of the range hood to open or close the air inlet, the flap including a first flap and a second flap, the first flap and the second flap being arranged side by side, the method including: The first oil fume concentration at the air inlet on the side where the first flap is located and the second oil fume concentration at the air inlet on the side where the second flap is located are obtained. Based on the first oil fume concentration and the second oil fume concentration, the working state of the range hood is determined, and the target flap is determined from the first flap and the second flap. If the range hood is in a single-sided strong suction mode, the target opening and closing angle corresponding to the concentration difference between the first oil fume concentration and the second oil fume concentration is determined according to a preset mapping relationship; the preset mapping relationship represents the correspondence between the concentration difference between the first oil fume concentration and the second oil fume concentration and the opening and closing angle of the target flap. Control the target flap to rotate outward to the target opening / closing angle.
2. The method according to claim 1, characterized in that, Determining the operating state of the range hood based on the first oil fume concentration and the second oil fume concentration includes: Obtain the concentration difference between the first oil fume concentration and the second oil fume concentration; If the concentration difference is greater than or equal to the first difference threshold, the range hood is determined to be in a single-sided strong suction working state.
3. The method according to claim 2, characterized in that, The process of establishing the preset mapping relationship includes: Multiple preset concentration differences are obtained under unilateral strong adsorption working state, and the maximum value among the multiple preset concentration differences is determined as the second difference threshold; the second difference threshold is greater than the first difference threshold; The termination opening and closing angle is determined based on the preset flow rate increase rate; the termination opening and closing angle is the preset opening and closing angle corresponding to the second difference threshold. The first difference threshold corresponds to the starting opening angle, and the second difference threshold corresponds to the ending opening angle. A correspondence between the concentration difference and the opening angle is established as the preset mapping relationship.
4. The method according to claim 3, characterized in that, The step of determining the termination opening / closing angle based on the preset flow rate increase includes: Determine multiple different preset opening and closing angles; For each preset opening angle, the rate of change of the air inlet area is determined based on the preset opening angle; The velocity increase rate is determined based on the rate of change of the air inlet area. Establish a correspondence between preset opening and closing angles and flow rate improvement rates based on each preset opening and closing angle and the corresponding flow rate improvement rate. Based on the aforementioned correspondence, the termination opening / closing angle is determined according to the preset flow rate increase rate.
5. The method according to claim 2, characterized in that, Before determining the concentration difference between the first oil fume concentration and the second oil fume concentration, if the first oil fume concentration is greater than or equal to the second oil fume concentration, the method further includes: Determine whether the concentration of the first oil fume is greater than or equal to a preset concentration threshold; If the first oil fume concentration is greater than or equal to the preset concentration threshold, determine whether the second oil fume concentration is greater than or equal to the preset concentration threshold; If the second oil fume concentration is greater than or equal to the preset concentration threshold, the concentration difference between the first oil fume concentration and the second oil fume concentration is determined.
6. The method according to claim 5, characterized in that, The method further includes: If the second oil fume concentration is less than the preset concentration threshold, it is determined that the range hood is in a single-sided working state; Control the first flap to rotate inward to open the air inlet on the side where the first flap is located, and control the second flap to rotate outward to close the air inlet on the side where the second flap is located.
7. The method according to claim 5, characterized in that, The method further includes: If the first oil fume concentration is less than the preset concentration threshold, it is determined that the range hood is in a non-working state; If the concentration difference between the first oil fume concentration and the second oil fume concentration is less than the first difference threshold, the range hood is determined to be in normal working condition. If the range hood is in a non-working state or a normal working state, control the first flap and the second flap to rotate inward to open the air inlet.
8. A control device for a range hood, characterized in that, An application to a range hood, the range hood including a flap and an air inlet, the flap being rotatably mounted on the main body of the range hood to open or close the air inlet, the flap including a first flap and a second flap, the first flap and the second flap being arranged side by side, the device including: The acquisition module is used to acquire the first oil fume concentration at the air inlet on the side where the first flap is located and to acquire the second oil fume concentration at the air inlet on the side where the second flap is located. The working status determination module is used to determine the working status of the range hood based on the first oil fume concentration and the second oil fume concentration, and to determine the target flap from the first flap and the second flap. The target opening / closing angle determination module is used to determine the target opening / closing angle corresponding to the concentration difference between the first oil fume concentration and the second oil fume concentration according to a preset mapping relationship if the range hood is in a single-sided strong suction working state; the preset mapping relationship represents the correspondence between the concentration difference between the first oil fume concentration and the second oil fume concentration and the opening / closing angle of the target flap. The control rotation module is used to control the target flap to rotate outward to the target opening and closing angle.
9. An electronic device, characterized in that, The electronic device includes a processor and a memory, wherein the memory stores at least one instruction or at least one program, and the at least one instruction or at least one program is loaded and executed by the processor to implement the control method of the range hood as described in any one of claims 1-7.
10. A computer storage medium, characterized in that, The computer storage medium stores at least one instruction or at least one program, which is loaded and executed by a processor to implement the control method of the range hood as described in any one of claims 1-7.