Methods, devices, range hoods, and storage media for removing grease from range hoods

Abstract

This application provides a method, apparatus, range hood, and storage medium for removing grease from a range hood, belonging to the field of smart home appliance technology. The method includes: acquiring the current rotation speed and current data of the range hood, and determining the grease rate based on the current data, wherein the grease rate indicates the rate of increase in grease thickness; determining a first rotation speed deviation based on the current rotation speed and a pre-recorded initial rotation speed when the range hood starts; determining whether the range hood requires grease removal based on the first rotation speed deviation and the grease rate; and if so, performing a grease removal operation. Through this method, the grease adhesion situation can be reflected in real time by the rotation speed deviation and grease rate during the operation of the range hood, thereby dynamically judging the grease removal need and improving the intelligence of the solution.

Description

Technical Field

[0001] This application belongs to the field of smart home appliance technology, specifically relating to a method, device, range hood, and storage medium for removing grease from a range hood. Background Technology

[0002] With the continuous improvement of residents' living standards, range hoods have become a standard appliance in household kitchens. Users' core demands for the product focus on "continuous high air volume, low noise, and efficient capture of cooking fumes." However, a large amount of market feedback shows that after a long period of operation, grease gradually adheres to the inner wall of the impeller and volute, reducing aerodynamic efficiency. This manifests as decreased air volume, increased noise, increased energy consumption, and a significantly lower smoke extraction effect compared to a new machine.

[0003] Existing descaling solutions generally adopt either a "fixed time" or "manual detection" strategy: the former automatically performs oil removal operations at a preset frequency; the latter requires users to manually select the oil removal function or call after-sales service for disassembly and cleaning after discovering severe oil buildup.

[0004] However, due to significant differences in the frequency of home cooking, the oil content of various cuisines, and the temperature and humidity of the environment, both fixed-cycle and manual / automatic methods can easily result in either "thick oil not removed" or "thin oil over-removed." The inability to promptly detect the degree of grease buildup and adaptively schedule cleaning reduces the intelligence of the solution. Summary of the Invention

[0005] This application provides a method, apparatus, range hood, and storage medium for removing grease from a range hood.

[0006] In a first aspect, this application provides a method for removing grease from a range hood, the method comprising:

[0007] The current rotation speed and current data of the range hood are obtained, and the grease buildup rate is determined based on the current data, wherein the grease buildup rate is used to indicate the rate at which the grease buildup thickness increases.

[0008] Based on the current rotational speed and the pre-recorded initial rotational speed of the range hood when it starts, a first rotational speed deviation is determined;

[0009] Determine whether the range hood requires oil removal based on the first rotation speed deviation and the oil stain rate;

[0010] If present, perform an oil removal operation.

[0011] In one possible implementation, determining whether the range hood requires grease removal based on the first rotational speed deviation and the grease rate includes:

[0012] Calculate the first speed deviation to the first speed ratio, and determine whether the first speed ratio is greater than or equal to a ratio threshold.

[0013] If so, then it is determined that the range hood has a need for grease removal;

[0014] If not, then determine whether the range hood needs oil removal based on the oil stain rate.

[0015] In one possible implementation, determining whether the range hood requires grease removal based on the grease buildup rate includes:

[0016] When the oil stain rate is greater than or equal to a rate threshold, a first rotational speed is determined based on the oil stain rate;

[0017] Determine whether the first rotational speed is greater than or equal to the rotational speed threshold;

[0018] If so, then it is determined that the range hood has a need for grease removal;

[0019] If not, it is determined that there is no need to remove oil stains, and the rotation speed of the range hood is increased based on the first rotation speed;

[0020] When the oil stain rate is less than the rate threshold, it is determined that there is no need for oil stain removal.

[0021] In one possible implementation, determining the sludge rate based on the current data includes:

[0022] Retrieve the reference current characteristic curve and determine the current deviation based on the current data and the reference current characteristic curve;

[0023] The grease index is determined based on the current deviation, wherein the grease index is used to indicate the current grease thickness of the range hood, and the grease index is proportional to the current deviation.

[0024] The oil stain rate is determined based on the oil stain index, the calculated adjacent previous oil stain index, and the corresponding current data acquisition interval.

[0025] In one possible implementation, the oil removal operation includes:

[0026] The corresponding oil stain removal mode is determined based on the oil stain rate and the oil stain index, or the first rotation speed ratio.

[0027] Determine whether the grease removal mode is a spin wash mode;

[0028] If so, then perform the oil removal operation based on the oil removal mode;

[0029] If not, when a prompt message indicating that the cooking device has completed the cooking operation is received, an oil removal operation is performed based on the oil removal mode.

[0030] In one possible implementation, after performing the oil removal operation based on the oil removal mode, the method further includes:

[0031] After a preset time period, the second rotation speed of the range hood is obtained;

[0032] Determine the second speed deviation from the initial speed, and determine the second speed deviation to the second speed ratio of the initial speed;

[0033] If the second speed ratio is greater than or equal to the ratio threshold, an error message will be output.

[0034] In one possible implementation, before acquiring the current rotation speed and current data of the range hood, the method further includes:

[0035] Based on the received cooking information, determine the oil grade and heat level;

[0036] Based on the oil grade and the firepower grade, the corresponding target oil stain adhesion scenario is determined, and the parameter adjustment coefficient is determined based on the target oil stain adhesion scenario;

[0037] Based on the parameter adjustment coefficient, the reference wind speed is corrected to obtain the recommended wind speed, and based on the parameter adjustment coefficient, the reference duration is corrected to obtain the recommended duration.

[0038] Perform oil stain pre-removal operation based on the recommended wind speed and the recommended duration.

[0039] Secondly, this application provides a grease removal device for a range hood, comprising: a first calculation module, a second calculation module, and a control module, wherein:

[0040] The first calculation module is used to acquire the current rotation speed and current data of the range hood, and determine the grease buildup rate based on the current data, wherein the grease buildup rate is used to indicate the rate of increase of grease thickness.

[0041] The second calculation module is used to determine the first speed deviation based on the current speed and the pre-recorded initial speed when the range hood is started;

[0042] The control module is used to determine whether the range hood needs oil removal based on the first speed deviation and the oil stain rate.

[0043] The control module is also used to perform an oil removal operation if there is a need for oil removal.

[0044] In one possible implementation, the control module is further configured to:

[0045] Calculate the first speed deviation to the first speed ratio, and determine whether the first speed ratio is greater than or equal to a ratio threshold.

[0046] If so, then it is determined that the range hood has a need for grease removal;

[0047] If not, then determine whether the range hood needs oil removal based on the oil stain rate.

[0048] In one possible implementation, the control module is further configured to:

[0049] When the oil stain rate is greater than or equal to a rate threshold, a first rotational speed is determined based on the oil stain rate;

[0050] Determine whether the first rotational speed is greater than or equal to the rotational speed threshold;

[0051] If so, then it is determined that the range hood has a need for grease removal;

[0052] If not, it is determined that there is no need to remove oil stains, and the rotation speed of the range hood is increased based on the first rotation speed;

[0053] When the oil stain rate is less than the rate threshold, it is determined that there is no need for oil stain removal.

[0054] In one possible implementation, the first computing module is further configured to:

[0055] Retrieve the reference current characteristic curve and determine the current deviation based on the current data and the reference current characteristic curve;

[0056] The grease index is determined based on the current deviation, wherein the grease index is used to indicate the current grease thickness of the range hood, and the grease index is proportional to the current deviation.

[0057] The oil stain rate is determined based on the oil stain index, the calculated adjacent previous oil stain index, and the corresponding current data acquisition interval.

[0058] In one possible implementation, the control module is further configured to:

[0059] The corresponding oil stain removal mode is determined based on the oil stain rate and the oil stain index, or the first rotation speed ratio.

[0060] Determine whether the grease removal mode is a spin wash mode;

[0061] If so, then perform the oil removal operation based on the oil removal mode;

[0062] If not, when a prompt message indicating that the cooking device has completed the cooking operation is received, an oil removal operation is performed based on the oil removal mode.

[0063] In one possible implementation, the control module is further configured to:

[0064] After a preset time period, the second rotation speed of the range hood is obtained;

[0065] Determine the second speed deviation from the initial speed, and determine the second speed deviation to the second speed ratio of the initial speed;

[0066] If the second speed ratio is greater than or equal to the ratio threshold, an error message will be output.

[0067] In one possible implementation, the control module is further configured to:

[0068] Based on the received cooking information, determine the oil grade and heat level;

[0069] Based on the oil grade and the firepower grade, the corresponding target oil stain adhesion scenario is determined, and the parameter adjustment coefficient is determined based on the target oil stain adhesion scenario;

[0070] Based on the parameter adjustment coefficient, the reference wind speed is corrected to obtain the recommended wind speed, and based on the parameter adjustment coefficient, the reference duration is corrected to obtain the recommended duration.

[0071] Perform oil stain pre-removal operation based on the recommended wind speed and the recommended duration.

[0072] Thirdly, this application provides a range hood, including: a processor, and a memory communicatively connected to the processor;

[0073] The memory stores computer-executed instructions;

[0074] The processor executes computer execution instructions stored in the memory to implement the grease removal method for the range hood as described in the first aspect.

[0075] Fourthly, this application provides a computer-readable storage medium storing computer-executable instructions, which, when executed by a computer, are used to implement the grease removal method for a range hood as described in the first aspect.

[0076] Fifthly, this application also provides a computer program product, including a computer program that, when executed by a processor, can implement the steps of the scheme recommendation method as described in any of the first aspects.

[0077] The grease removal method, apparatus, range hood, and storage medium provided in this application determine the grease buildup rate through current data during range hood operation, determine the speed deviation from the initial speed through the current speed, and combine the grease buildup rate and speed deviation to determine whether the range hood requires grease removal. If so, the grease removal operation is performed. Through this method, the grease adhesion situation can be reflected in real time by the speed deviation and grease buildup rate during the range hood's operation, thereby dynamically judging the grease removal need and improving the intelligence of the solution. Attached Figure Description

[0078] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with this application and, together with the description, serve to explain the principles of this application.

[0079] Figure 1 A flowchart illustrating a method for removing grease from a range hood provided in this application embodiment. Figure 1 ;

[0080] Figure 2 A flowchart illustrating a method for removing grease from a range hood provided in this application embodiment. Figure 2 ;

[0081] Figure 3 This is a schematic diagram of the structure of a grease removal device for a range hood provided in an embodiment of this application;

[0082] Figure 4 This is a schematic diagram of the structure of a range hood provided in an embodiment of this application.

[0083] The accompanying drawings illustrate specific embodiments of this application, which will be described in more detail below. These drawings and descriptions are not intended to limit the scope of the concept in any way, but rather to illustrate the concept of this application to those skilled in the art through reference to particular embodiments. Detailed Implementation

[0084] To make the objectives, technical solutions, and advantages of this application clearer, the technical solutions 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, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0085] As living standards improve, range hoods have become an essential kitchen appliance. However, long-term use leads to grease buildup and performance degradation. Existing descaling solutions use fixed cycles or manual triggering modes, but they cannot adapt to different cooking frequencies, grease levels, and environmental differences among families, easily resulting in problems of "untimely removal" or "over-removal." They also lack real-time sensing and adaptive adjustment capabilities for grease levels, and their level of intelligence is insufficient.

[0086] This application provides a method for removing grease from a range hood. During range hood operation, the grease buildup rate is determined using current data, and the speed deviation from the initial speed is determined using the current speed. By combining the grease buildup rate and speed deviation, it is determined whether grease removal is needed. If so, a grease removal operation is performed. This method allows for real-time monitoring of grease adhesion based on speed deviation and grease buildup rate during range hood operation, enabling dynamic judgment of grease removal needs and improving the intelligence of the solution.

[0087] The technical solutions of this application and how they solve the aforementioned technical problems are described in detail below with specific embodiments. These specific embodiments may exist independently or in combination with each other. Identical or similar concepts or processes may not be repeated in some embodiments. The embodiments of this application will now be described with reference to the accompanying drawings.

[0088] Figure 1 A flowchart illustrating a method for removing grease from a range hood provided in this application embodiment. Figure 1 .like Figure 1 As shown, the method includes:

[0089] S101. Obtain the current speed and current data of the range hood, and determine the grease buildup rate based on the current data.

[0090] Among them, the grease rate is used to indicate the rate at which the grease thickness increases.

[0091] In this step, as residents' quality of life continues to improve, range hoods have become standard appliances in household kitchens. Users' core demands for these products focus on "continuous high airflow, low noise, and efficient fume extraction." However, extensive market feedback indicates that after prolonged operation, grease gradually adheres to the impeller and volute inner walls of range hoods, leading to decreased aerodynamic efficiency. This manifests as reduced airflow, increased noise, increased energy consumption, and a significantly lower fume extraction effect compared to new machines. Existing descaling solutions generally employ either a "fixed-time" or "manual detection" strategy: the former automatically performs grease removal at a preset frequency; the latter requires users to manually select the grease removal function or call after-sales service for disassembly and cleaning after discovering severe grease buildup. However, due to significant differences in cooking frequency, oil content in dishes, and ambient temperature and humidity, both fixed-cycle and manual / automatic methods easily result in either "thick grease not removed" or "thin grease over-removed." The inability to promptly detect the degree of grease adhesion and adaptively schedule cleaning reduces the intelligence of the solution.

[0092] When a range hood is heavily grease-laden, the motor speed is affected. As the hood operates, the motor speed deviates from its initial speed. The underlying mechanism is that grease continuously accumulates on the impeller and volute walls, reducing the cross-sectional area of ​​the flow channel and increasing surface roughness, leading to a significant increase in airflow resistance. To maintain a constant outlet static pressure and airflow, the range hood must actively increase the motor speed to overcome the increased aerodynamic resistance, thus causing the real-time speed to gradually deviate from the factory-specified "grease-free standard." Therefore, the degree of grease buildup in the range hood can be determined by observing the speed deviation during operation, thus indicating whether grease removal is necessary.

[0093] Meanwhile, when the rotation speed deviation is not significant, although the grease buildup is not severe, the rate of grease buildup increases as grease continues to adhere during cooking, meaning the grease layer thickness increases more rapidly per unit time. To prevent the grease from thickening rapidly in a short period, it is necessary to increase the rotation speed to compensate for the airflow. At the same time, the greater wall shear stress generated by the high rotation speed will immediately detach any uncured oil droplets, thereby weakening grease adhesion.

[0094] Therefore, upon detecting the range hood's operation, the system acquires its current speed and current data. The current data is used to determine the rate of grease buildup. The principle is that grease buildup increases the impeller's aerodynamic drag torque, requiring the motor to output greater torque to maintain the set speed. Since torque is proportional to motor current, grease buildup affects the motor current. By synchronously monitoring speed deviations and current changes, the system can intervene early and clean as needed before grease buildup causes significant performance degradation.

[0095] The specific steps for determining the oil stain rate based on current data are as follows:

[0096] Retrieve the reference current characteristic curve and determine the current deviation based on the current data and the reference current characteristic curve;

[0097] The grease index is determined based on the current deviation. The grease index is used to indicate the current grease thickness of the range hood and is directly proportional to the current deviation.

[0098] The oil stain rate is determined based on the oil stain index, the calculated adjacent previous oil stain index, and the corresponding current data acquisition interval.

[0099] For example, when a user cooks for 15 minutes, the current data collected from the range hood is 410mA, and the current speed is 1400rpm. Referring to the reference current characteristic curve, the reference current corresponding to 1400rpm is determined to be 380mA. The proportionality coefficient between the grease index and the current deviation is 1.

[0100] The current deviation is calculated as: 410-380=30mA. Based on the current deviation and the proportional coefficient, the oil stain index is calculated as: 30×1=30.

[0101] The grease index calculated 2 minutes ago is 26, and the grease rate is calculated as: (30-26) / 2=2 / min.

[0102] In one possible implementation, in conjunction with the cooking scenario, the range hood performs a grease removal operation before formally extracting grease. This softens the attached grease and throws it off the impeller: the heating belt first heats the impeller surface, reducing the viscosity and cohesion of the grease. Then, the centrifugal force generated by the short-term high-speed rotation throws the softened oil film against the volute wall and into the oil cup along the oil guide groove. During the formal extraction process, because the thickness of the attached grease is reduced, the airflow channel maintains its initial smoothness, the boundary layer separation point is delayed, eddy current dissipation is weakened, and the probability of oil droplet impact decreases. This significantly reduces the subsequent grease accumulation rate, making the virtual oil thickness rise curve under the same amount of grease rise significantly slower. The rated airflow can be maintained without increasing the speed for compensation, achieving simultaneous optimization of airflow, noise, and energy consumption. The specific steps are as follows:

[0103] Based on the received cooking information, determine the oil grade and heat level;

[0104] Based on the oil grade and firepower level, the corresponding target oil stain adhesion scenario is determined, and the parameter adjustment coefficient is determined based on the target oil stain adhesion scenario;

[0105] The recommended wind speed is obtained by correcting the reference wind speed based on the parameter adjustment coefficient, and the recommended duration is obtained by correcting the reference duration based on the parameter adjustment coefficient.

[0106] Perform grease pre-removal operation based on recommended wind speed and recommended duration.

[0107] For example, the received cooking information is "Stir-fried Beef with Yellow Peppers". The oil grade is determined to be L-3 (30g rapeseed oil), and the heat level is H-2 (4KW, 3 minutes). Based on the oil grade and heat level, the oil residue adhesion scenario is determined to be "medium-high oil mist - high-temperature stir-fry". The parameter adjustment coefficient for this scenario is 1.25. The reference wind speed is 8m / s, and the reference duration is 6s.

[0108] Based on the parameter adjustment coefficient and the reference wind speed, the recommended wind speed is calculated to be 1.25 × 8 = 10 m / s. Based on the parameter adjustment coefficient and the reference duration, the recommended duration is calculated to be 1.25 × 6 = 7.5 s.

[0109] S102. Determine the first speed deviation based on the current speed and the pre-recorded initial speed when the range hood starts.

[0110] In this step, after obtaining the current rotation speed, the initial rotation speed recorded during the current operation of the range hood is retrieved, and the first rotation speed deviation is determined based on the difference between the current rotation speed and the initial rotation speed. This first rotation speed deviation is used to indicate the current oil and grease buildup on the range hood; the larger the first rotation speed deviation value, the more severe the oil and grease buildup.

[0111] S103. Determine whether the range hood needs oil removal based on the first speed deviation and oil stain rate.

[0112] In this step, since the first speed deviation can directly indicate the severity of oil stain adhesion, the first speed deviation is placed first in the judgment. When the first speed deviation exceeds the preset threshold, it means that the flow channel of the range hood is seriously blocked by oil stains. There is no need to refer to other parameters to immediately determine that the oil stain adhesion is serious, thus determining that the range hood has an oil stain removal requirement.

[0113] If the initial speed deviation has not yet reached the threshold, it indicates that the current grease layer is still mild. The assessment doesn't end there; instead, the dynamic indicator of grease rate is introduced to evaluate the grease accumulation trend in the near future. Based on this, the range hood increases its speed to compensate for the reduced airflow due to the mild grease buildup. However, if the required speed increase approaches the safety limits of the motor and structure, it indicates that the grease buildup is becoming severe. Without any intervention, subsequent cooking oil droplets will quickly accumulate on the existing thin grease layer, rapidly increasing the grease thickness and ultimately leading to a continuous decrease in the range hood's airflow, a significant reduction in its performance, and a decreased user experience. Therefore, when it's determined that increasing the range hood's speed cannot compensate for the reduced airflow, it's confirmed that the range hood requires grease removal.

[0114] The specific steps will be explained in detail in subsequent embodiments, and will not be elaborated on here.

[0115] S104. If present, perform the oil stain removal operation.

[0116] In this step, when it is determined that the range hood needs grease removal, the grease removal operation is performed. This embodiment does not limit the grease removal operation in any way, and it can be selected according to the actual situation. For example, the range hood can remove grease through three methods: self-rotating washing, steam washing, and swelling washing: self-rotating washing only heats the impeller and rotates it at high speed, using centrifugal force to throw out softened grease; steam washing sprays high-temperature steam to wet and soften the grease before it is thrown off at high speed; swelling washing alternates between steam softening and high and low speed switching to tear and throw out stubborn grease, and the wastewater is all discharged into the oil cup along the oil guide groove.

[0117] Furthermore, most range hoods currently achieve their grease removal function primarily through three modes: swirl cleaning, steam cleaning, and swelling cleaning. Steam cleaning softens grease with high-temperature steam, while swelling cleaning relies on the chemical decomposition of grease by cleaning agents. Both of these modes involve high temperatures or the use of chemical reagents, and therefore have significant safety limitations—cleaning can only be performed when the range hood is completely stopped. This characteristic dictates that their operation must strictly adhere to a standardized "stop-clean-restart" procedure. In contrast, swirl cleaning can perform auxiliary cleaning while the equipment is running.

[0118] In practical applications, different grease removal modes correspond to different grease removal mechanisms: steam washing is suitable for treating heavy grease in high-temperature resistant areas, swelling washing is more suitable for dealing with stubborn polymerized grease stains, while spin washing is suitable for preventative maintenance of light grease in daily life. Based on these differences, this embodiment innovatively introduces a multi-dimensional evaluation system. The corresponding grease removal mode is determined by grease rate, grease index, or first rotation speed ratio. Based on whether the grease removal mode can be performed during range hood operation, the grease removal operation is performed during or after the range hood's operation. The specific steps are as follows:

[0119] The corresponding oil removal mode is determined based on the oil stain rate and oil stain index, or the first rotation speed ratio.

[0120] Determine if the grease removal mode is the spin wash mode;

[0121] If so, perform the oil removal operation based on the oil removal mode;

[0122] If not, when a prompt message is received instructing the cooking device to complete the cooking operation, an oil removal operation will be performed based on the oil removal mode.

[0123] When the range hood is determined to require grease removal based on the current rotation speed, the corresponding grease removal mode is determined directly based on the first rotation speed ratio. When the grease removal requirement is determined based on the grease rate, the corresponding grease removal mode is determined based on the grease condition, i.e., the grease rate and grease index. A mapping relationship between the first rotation speed ratio and the grease adhesion scenario, as well as a mapping relationship between the grease index, grease rate, and the grease adhesion scenario, can be pre-established.

[0124] For example, the mapping relationship between grease buildup rate, grease index, and grease adhesion scenario is as follows:

[0125] When the grease index is less than 60 and the grease rate is less than 15, the corresponding grease adhesion scenario is: light adhesion scenario.

[0126] When the grease index is less than 60 and the grease rate is greater than or equal to 15, the corresponding grease adhesion scenario is: thin grease is easy to adhere.

[0127] When the grease index is greater than or equal to 60 and the grease rate is less than 15, the corresponding grease adhesion scenario is: thick grease that is difficult to adhere.

[0128] When the grease index is greater than or equal to 60 and the grease rate is greater than or equal to 15, the corresponding grease adhesion scenario is: thick grease is easy to adhere to.

[0129] Furthermore, to ensure the effectiveness of grease removal, this embodiment collects a second rotation speed after the range hood performs the grease removal operation, and determines whether the grease removal effect meets the standard based on the second rotation speed. The specific process is as follows:

[0130] After a preset time period, obtain the second rotation speed of the range hood;

[0131] Determine the second speed deviation from the initial speed, and determine the ratio of the second speed deviation to the initial speed.

[0132] If the second speed ratio is greater than or equal to the ratio threshold, an error message will be output.

[0133] This application provides a method for removing grease from a range hood. During range hood operation, the grease buildup rate is determined using current data, and the speed deviation from the initial speed is determined using the current speed. By combining the grease buildup rate and speed deviation, the method determines whether grease removal is needed and, if so, performs the grease removal operation. This method allows for real-time reflection of grease adhesion through speed deviation and grease buildup rate during range hood operation, dynamically judging the need for grease removal and improving the intelligence of the solution. Furthermore, before the range hood begins to draw in grease, a pre-removal operation is performed based on the cooking power level and oil usage, significantly reducing the subsequent grease buildup rate. The strategy of determining the grease removal mode based on multi-parameter fusion effectively solves the problem of insufficient adaptability of traditional single grease removal modes, significantly improving the adaptive cleaning capability of the range hood in different usage scenarios.

[0134] Figure 2 A flowchart illustrating a method for removing grease from a range hood provided in this application embodiment. Figure 2 This embodiment provides a detailed explanation of the steps involved in determining whether a range hood requires grease removal. Figure 2 As shown, the method includes:

[0135] S201. Calculate the first speed deviation and the first speed ratio of the initial speed, and determine whether the first speed ratio is greater than or equal to the ratio threshold.

[0136] In this step, considering that the first speed deviation is a key indicator for assessing the degree of grease buildup, and its value change directly reflects the grease channel blockage, the process of determining the need for grease removal prioritizes determining whether the first speed deviation value exceeds a preset safety threshold, i.e., whether the ratio of the first speed deviation to the initial speed of the range hood during operation is too large. When it is determined that the first speed ratio is too large, it indicates that the grease buildup inside the range hood has reached a critical state. At this point, the verification of other auxiliary parameters can be skipped, and it can be directly determined that the range hood has a serious grease adhesion problem, i.e., there is a need for grease removal.

[0137] Therefore, after calculating the first speed deviation, the first speed ratio is determined based on the ratio of the first speed deviation to the initial speed. A ratio threshold is then obtained. The ratio threshold can be selected according to the operating mode of the range hood, generally between 8% and 12%. Afterward, it is determined whether the first speed ratio is greater than or equal to the ratio threshold.

[0138] S202. If so, then it is determined that the range hood has a need for grease removal.

[0139] In this step, when the first speed ratio is determined to be greater than or equal to the ratio threshold, it indicates that the grease buildup inside the range hood has reached a critical state, and it is determined that the range hood has a need for grease removal.

[0140] S203. If not, determine whether the oil stain rate is greater than or equal to the rate threshold.

[0141] In this step, when the first speed ratio of the range hood does not exceed the ratio threshold, it indicates that the current grease accumulation is still in a mild stage. However, the process of determining the grease removal requirement will not be terminated immediately. Instead, the dynamic monitoring parameter of grease rate is introduced to predict the growth trend of grease thickness in the short term. If the grease rate is detected to exceed the safety threshold, it means that the grease thickness is already in a medium thickness range, and as the range hood continues to operate, the grease rate and grease index will further accelerate, ultimately affecting the normal operation performance of the range hood. In this case, this embodiment comprehensively evaluates the dynamic changes in grease rate and intelligently decides whether to compensate for the airflow loss simply by increasing the motor speed to maintain the range hood's working efficiency and user experience, or to determine that the range hood has reached a load state requiring active grease cleaning, i.e., there is a need for grease removal. This mechanism achieves accurate prediction and graded response to grease removal needs by real-time monitoring of both static and dynamic parameters.

[0142] Specifically, when the rotational speed ratio is determined to be less than a ratio threshold, it is determined whether the pre-calculated oil sludge rate is greater than or equal to a rate threshold. The rate threshold can be determined based on the actual situation.

[0143] S204. If the speed is greater than or equal to the rate threshold, the first rotation speed is determined based on the oil stain rate, and it is determined whether the first rotation speed is greater than or equal to the rotation speed threshold.

[0144] In this step, when the grease buildup rate is determined to be greater than or equal to the rate threshold, it indicates that the current grease buildup index of the range hood is at a moderate level. As the range hood continues to operate, the grease buildup rate and index may continue to rise, thus affecting the range hood's efficiency. Therefore, to ensure a good user experience and optimal performance, it is necessary to compensate for the range hood's airflow by increasing its rotation speed.

[0145] However, considering that if the initial speed required to be increased is too high, it means that the degree of grease buildup on the range hood is close to the critical point where grease removal is needed. If the speed is increased according to the initial speed, it will accelerate the deterioration of grease buildup, significantly reducing the working efficiency of the range hood and the user experience. Therefore, before increasing the speed based on the initial speed, it is necessary to determine whether the initial speed is too high, and then proceed with the speed increase operation, or to determine whether the range hood has a need for grease removal.

[0146] Specifically, when the oil sludge rate is determined to be greater than or equal to a rate threshold, a speed adjustment coefficient is determined based on the oil sludge rate range within which the oil sludge rate falls. A first speed is then determined based on the product of the current speed and the speed adjustment coefficient. Finally, it is determined whether the first speed is greater than or equal to the speed threshold.

[0147] Both the speed threshold and the rate threshold can be selected according to the actual situation. For example, the ratio of the speed threshold to the initial speed is between 1.1 and 1.15. The rate threshold can be between 18 and 22.

[0148] S205. If the first rotation speed is greater than or equal to the rotation speed threshold, it is determined that the range hood has a need for oil stain removal.

[0149] In this step, when the first rotation speed is determined to be greater than or equal to the rotation speed threshold, it indicates that the current grease buildup on the range hood is approaching the critical state where grease removal is required. To avoid affecting the subsequent use of the range hood, it is directly determined that the range hood has a need for grease removal.

[0150] S206. If the first rotation speed is less than the rotation speed threshold, it is determined that there is no need to remove oil stains, and the rotation speed of the range hood is increased based on the first rotation speed.

[0151] In this step, when the first rotation speed is less than the rotation speed threshold, it means that the degree of grease buildup on the range hood is within the allowable range, so the rotation speed can be increased directly based on the first rotation speed.

[0152] Furthermore, considering the uncertainty of users' cooking time and whether increasing the range hood's speed reduces grease buildup, after the range hood increases its speed at the initial setting, current data is continuously monitored to determine the corresponding grease buildup rate, and the grease removal requirement is re-evaluated. This process continues until the range hood stops operating, or until it is determined that grease removal is needed.

[0153] S207. If the rate is less than the threshold, it is determined that there is no need for oil stain removal.

[0154] In this step, when the rate of grease buildup is less than the rate threshold, it means that the range hood does not need to remove grease at this time, and the degree of grease adhesion has little impact on the airflow of the range hood. Therefore, there is no need to increase the speed to compensate for the reduced airflow due to grease adhesion.

[0155] However, considering the above steps, the accumulation of grease will worsen as the range hood operates, potentially increasing the grease buildup rate. Therefore, it is necessary to collect current data at a preset frequency to determine the corresponding grease buildup rate and then re-determine the grease removal requirement. This process continues until the range hood stops operating, or it is determined that grease removal is needed.

[0156] This application provides a method for removing grease from a range hood. It prioritizes determining whether grease removal is needed based on a first speed deviation. If no grease is needed, it further considers the relationship between the grease rate and a rate threshold to confirm no further grease removal is required. Alternatively, it compensates for lost airflow by increasing the speed, or determines that grease removal is needed based on a first required speed increase. This method avoids false triggering and reduces ineffective cleaning by using a tiered judgment logic of "speed deviation first, grease rate second." It also automatically increases the speed to compensate for lost airflow, maintaining system efficiency. By proactively identifying grease accumulation based on the required first speed increase, it triggers removal in advance, reducing the risk of long-term performance degradation.

[0157] Figure 3 This is a schematic diagram of a grease removal device for a range hood provided in an embodiment of this application. Figure 3 As shown, the grease removal device 30 of the range hood includes: a first calculation module 301, a second calculation module 302, and a control module 303, wherein:

[0158] The first calculation module 301 is used to obtain the current speed and current data of the range hood, and determine the grease rate based on the current data, wherein the grease rate is used to indicate the rate of increase of grease thickness.

[0159] The second calculation module 302 is used to determine the first speed deviation based on the current speed and the pre-recorded initial speed when the range hood is started.

[0160] Control module 303 is used to determine whether the range hood needs oil removal based on the first speed deviation and oil stain rate;

[0161] The control module is also used to perform oil removal operations if there is a need for oil removal.

[0162] In one possible implementation, the control module 303 is further configured to:

[0163] Calculate the first speed deviation to the first speed ratio, and determine whether the first speed ratio is greater than or equal to the ratio threshold.

[0164] If so, then it is confirmed that the range hood needs grease removal.

[0165] If not, determine whether the range hood needs grease removal based on the grease buildup rate.

[0166] In one possible implementation, the control module 303 is further configured to:

[0167] When the oil stain rate is greater than or equal to the rate threshold, the first rotational speed is determined based on the oil stain rate;

[0168] Determine whether the first rotational speed is greater than or equal to the rotational speed threshold;

[0169] If so, then it is confirmed that the range hood needs grease removal.

[0170] If not, then it is determined that there is no need to remove grease, and the speed of the range hood is increased based on the first speed.

[0171] When the rate of oil buildup is less than the rate threshold, it is determined that there is no need for oil buildup removal.

[0172] In one possible implementation, the first computing module 301 is further configured to:

[0173] Retrieve the reference current characteristic curve and determine the current deviation based on the current data and the reference current characteristic curve;

[0174] The grease index is determined based on the current deviation. The grease index is used to indicate the current grease thickness of the range hood and is directly proportional to the current deviation.

[0175] The oil stain rate is determined based on the oil stain index, the calculated adjacent previous oil stain index, and the corresponding current data acquisition interval.

[0176] In one possible implementation, the control module 303 is further configured to:

[0177] The corresponding oil removal mode is determined based on the oil stain rate and oil stain index, or the first rotation speed ratio.

[0178] Determine if the grease removal mode is the spin wash mode;

[0179] If so, perform the oil removal operation based on the oil removal mode;

[0180] If not, when a prompt message is received instructing the cooking device to complete the cooking operation, an oil removal operation will be performed based on the oil removal mode.

[0181] In one possible implementation, the control module 303 is further configured to:

[0182] After a preset time period, obtain the second rotation speed of the range hood;

[0183] Determine the second speed deviation from the initial speed, and determine the ratio of the second speed deviation to the initial speed.

[0184] If the second speed ratio is greater than or equal to the ratio threshold, an error message will be output.

[0185] In one possible implementation, the control module 303 is further configured to:

[0186] Based on the received cooking information, determine the oil grade and heat level;

[0187] Based on the oil grade and firepower level, the corresponding target oil stain adhesion scenario is determined, and the parameter adjustment coefficient is determined based on the target oil stain adhesion scenario;

[0188] The recommended wind speed is obtained by correcting the reference wind speed based on the parameter adjustment coefficient, and the recommended duration is obtained by correcting the reference duration based on the parameter adjustment coefficient.

[0189] Perform grease pre-removal operation based on recommended wind speed and recommended duration.

[0190] This embodiment provides a grease removal device for a range hood, which can perform the grease removal method for a range hood provided in the above method embodiment. Its implementation principle and technical effect are similar, and will not be described in detail here.

[0191] Figure 4 This is a schematic diagram of the structure of a range hood provided in an embodiment of this application. Figure 4 As shown, the range hood 40 includes a processor 401 and a memory 402 communicatively connected to the processor 401. Optionally, the range hood 40 also includes a communication component 403. The processor 401, memory 402, and communication component 403 are connected via a bus 404.

[0192] Memory 402 stores instructions executed by the computer;

[0193] The processor 401 executes computer execution instructions stored in the memory 402 to implement the grease removal method for the range hood as described above.

[0194] At least one processor 401 may be a central processing unit (CPU), an application-specific integrated circuit (ASIC), or one or more integrated circuits configured to implement the embodiments of this application.

[0195] Optionally, in specific implementations, the processor 401 and memory 402 are implemented independently. In this case, the processor 401 and memory 402 can be interconnected via a bus to complete communication between them. The bus can be an Industry Standard Architecture (ISA) bus, a Peripheral Component Interconnect (PCI) bus, or an Extended Industry Standard Architecture (EISA) bus, etc. Buses can be categorized as address buses, data buses, control buses, etc., but this does not imply that there is only one bus or one type of bus.

[0196] Optionally, in a specific implementation, if the processor 401 and the memory 402 are integrated on a single chip, the processor 401 and the memory 402 can communicate through an internal interface.

[0197] This application also provides a computer storage medium storing computer execution instructions, which, when executed by a processor, implement the aforementioned method for removing grease from a range hood.

[0198] The aforementioned computer-readable storage medium can be implemented by any type of volatile or non-volatile storage device or a combination thereof, such as static random access memory (SRAM), electrically erasable programmable read-only memory (EEPROM), erasable programmable read-only memory (EPROM), programmable read-only memory (PROM), read-only memory (ROM), magnetic storage, flash memory, magnetic disk, or optical disk. The computer-readable storage medium can be any available medium accessible to a general-purpose or special-purpose computer.

[0199] An exemplary readable storage medium is coupled to a processor, enabling the processor to read information from and write information to the readable storage medium. Alternatively, the readable storage medium can be an integral part of the processor. Both the processor and the readable storage medium can reside in an Application Specific Integrated Circuit (ASIC). Alternatively, the processor and the readable storage medium can exist as discrete components in the control device of a garment handling apparatus.

[0200] This unit division is merely a logical functional division; in actual implementation, there may be other division methods. For example, multiple units or components may be combined or integrated into another system, or some features may be ignored or not executed. Furthermore, the coupling or direct coupling or communication connection shown or discussed may be indirect coupling or communication connection through some interfaces, devices, or units, and may be electrical, mechanical, or other forms.

[0201] The units described as separate components may or may not be physically separate. The components shown as units may or may not be physical units; that is, they may be located in one place or distributed across multiple network units. Some or all of the units can be selected to achieve the purpose of this embodiment according to actual needs.

[0202] In addition, the functional units in the various embodiments of the present invention can be integrated into one processing unit, or each unit can exist physically separately, or two or more units can be integrated into one unit.

[0203] If this function is implemented as a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of this invention, or the part that contributes to the prior art, or a part of the technical solution, can be embodied in the form of a software product. This computer software product is stored in a storage medium and includes several instructions to cause a computer device (which may be a personal computer, server, or network device, etc.) to execute all or part of the steps of the methods indicated in the various embodiments of this invention. The aforementioned storage medium includes various media capable of storing program code, such as USB flash drives, portable hard drives, read-only memory (ROM), random access memory (RAM), magnetic disks, or optical disks.

[0204] Those skilled in the art will understand that all or part of the steps of the above-described method embodiments can be implemented by hardware related to program instructions. The aforementioned program can be stored in a computer-readable storage medium. When executed, the program performs the steps of the above-described method embodiments; and the aforementioned storage medium includes various media capable of storing program code, such as ROM, RAM, magnetic disks, or optical disks.

[0205] The technical solutions of this application have been described above with reference to the preferred embodiments shown in the accompanying drawings. However, it is readily understood by those skilled in the art that the scope of protection of this application is obviously not limited to these specific embodiments. The above embodiments are only used to illustrate the technical solutions of this application and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. These modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application.

Claims

1. A method of grease removal for a range hood, characterized by, The method comprises: obtaining current rotating speed and current data of the range hood, and determining a grease speed based on the current data, wherein the grease speed is used to indicate a rising speed of the grease thickness; determining a first rotating speed deviation based on the current rotating speed and a pre-recorded initial rotating speed of the range hood when starting; determining whether the range hood has a grease removal requirement based on the first rotating speed deviation and the grease speed; if yes, performing a grease removal operation; the determination of whether the range hood has a grease removal requirement based on the first rotating speed deviation and the grease speed comprises: calculating a first rotating speed ratio of the first rotating speed deviation and the initial rotating speed, and determining whether the first rotating speed ratio is greater than or equal to a ratio threshold value; if yes, determining that the range hood has a grease removal requirement; if no, determining whether the range hood has a grease removal requirement based on the grease speed.

2. The method of claim 1, wherein, the determination of whether the range hood has a grease removal requirement based on the grease speed comprises: when the grease speed is greater than or equal to a speed threshold value, determining a first rotating speed based on the grease speed; determining whether the first rotating speed is greater than or equal to a rotating speed threshold value; if yes, determining that the range hood has a grease removal requirement; if no, determining no grease removal requirement and increasing the rotating speed of the range hood based on the first rotating speed; when the grease speed is less than the speed threshold value, determining no grease removal requirement.

3. The method of claim 2, wherein, the determination of the grease speed based on the current data comprises: calling a reference current characteristic curve, and determining a current deviation based on the current data and the reference current characteristic curve; determining a grease index based on the current deviation, wherein the grease index is used to indicate the current grease thickness of the range hood, and the grease index is proportional to the current deviation; determining a grease speed based on the grease index, a last adjacent grease index and a corresponding current data collection interval.

4. The method of claim 3, wherein, the performance of the grease removal operation comprises: determining a corresponding grease removal mode based on the grease speed and the grease index, or the first rotating speed ratio; determining whether the grease removal mode is a self-cleaning mode; if yes, performing the grease removal operation based on the grease removal mode; if no, performing the grease removal operation based on the grease removal mode when receiving prompt information indicating that a cooking device completes a cooking operation.

5. The method of claim 4, wherein, after the performance of the grease removal operation based on the grease removal mode, the method further comprises: obtaining a second rotating speed of the range hood after a preset time period; determining a second rotating speed deviation of the second rotating speed and the initial rotating speed, and a second rotating speed ratio of the second rotating speed deviation and the initial rotating speed; when the second rotating speed ratio is greater than or equal to the ratio threshold value, outputting an abnormal prompt.

6. The method of claim 1, wherein, before the obtaining of the current rotating speed and the current data of the range hood, the method further comprises: determining an oiling level and a fire level based on received cooking information; determine a corresponding target oil stain adhesion scene based on the oil use level and the fire level, and determine a parameter adjustment coefficient based on the target oil stain adhesion scene; correct a reference wind speed based on the parameter adjustment coefficient to obtain a recommended wind speed, and correct a reference time length based on the parameter adjustment coefficient to obtain a recommended time length; perform an oil stain pre-removal operation based on the recommended wind speed and the recommended time length.

7. A grease removal device for a range hood, characterized in that comprise: a first calculation module, a second calculation module, and a control module, wherein: the first calculation module is configured to obtain a current rotating speed of an extractor hood and current data, and determine an oil stain rate based on the current data, wherein the oil stain rate is used to indicate a rising rate of an oil stain thickness; the second calculation module is configured to determine a first rotating speed deviation based on the current rotating speed and a pre-recorded initial rotating speed of the extractor hood when the extractor hood is started; the control module is configured to determine whether the extractor hood has an oil stain removal requirement based on the first rotating speed deviation and the oil stain rate; the control module is further configured to perform an oil stain removal operation if the extractor hood has the oil stain removal requirement; the determination of whether the extractor hood has the oil stain removal requirement based on the first rotating speed deviation and the oil stain rate comprises: calculating a first rotating speed ratio of the first rotating speed deviation to the initial rotating speed, and determining whether the first rotating speed ratio is greater than or equal to a ratio threshold value; if yes, it is determined that the extractor hood has the oil stain removal requirement; if no, it is determined whether the extractor hood has the oil stain removal requirement based on the oil stain rate.

8. An extractor hood, characterized in that comprise: a processor, and a memory connected to the processor in communication; the memory stores computer execution instructions; the processor executes the computer execution instructions stored in the memory to implement the method according to any one of claims 1 to 6.

9. A computer-readable storage medium, characterized in that, The computer readable storage medium stores computer execution instructions, and the computer execution instructions are executed by the processor to implement the oil stain removal method of the extractor hood according to any one of claims 1 to 6.

Images