Range hood control method and range hood

Abstract

The present invention belongs to the field of electrical appliance technology and specifically discloses a range hood control method and a range hood. The control method includes the following steps: identifying the cooking dish and cooking method in the cooking state; obtaining a cooking temperature-oil fume volume curve corresponding to the cooking dish and the cooking method; detecting the cooking temperature in real time and predicting the oil fume volume based on the detected cooking temperature and the cooking temperature-oil fume volume curve; and adjusting the suction wind force of the range hood based on the predicted oil fume volume. The range hood is controlled using the above-mentioned control method. The range hood control method and range hood disclosed in the present invention can improve the effect of adjusting the suction wind force, improve the oil fume extraction effect, and save energy.

Description

Technical Field

[0001] The present invention belongs to the technical field of electrical appliances, and in particular relates to a control method for a range hood and the range hood. Background Art

[0002] With the improvement of people's quality of life, range hoods have become an indispensable appliance in the kitchen. They are usually installed above the kitchen stove and can quickly exhaust the exhaust gas generated by the gas stove and the fumes generated during the cooking process, thereby purifying the kitchen environment and improving people's comfort when cooking.

[0003] During cooking, the amount of oil smoke varies with the cooking temperature, cooking method, and ingredients, and the required airflow also changes accordingly. Existing range hoods typically cannot automatically adjust the airflow, which can lead to problems such as oil smoke overflowing due to insufficient airflow or wasted airflow due to excessive airflow, affecting the performance of the range hood and reducing the user experience.

[0004] Therefore, there is an urgent need for a control method for a range hood and a range hood to solve the above problems. Summary of the Invention

[0005] The object of the present invention is to provide a control method for a range hood and a range hood, so as to improve the reliability of wind force regulation of the range hood, improve the oil fume extraction effect of the range hood, and reduce the energy consumption of the range hood.

[0006] To achieve the above object, the present invention adopts the following technical solutions:

[0007] A range hood control method comprises the following steps:

[0008] Identify the cooking dishes and cooking methods in the cooking state;

[0009] Obtaining a cooking temperature-oil smoke volume curve corresponding to the cooking dish and the cooking method;

[0010] Detecting the cooking temperature in real time, and predicting the amount of oil smoke based on the detected cooking temperature and the cooking temperature-oil smoke amount curve;

[0011] Based on the predicted amount of oil smoke, the suction wind force of the range hood is adjusted.

[0012] As an optional technical solution for a range hood control method, the cooking dish and cooking method when identifying the cooking state specifically include:

[0013] During the cooking process, an image detection device is used to photograph the stove;

[0014] The cooking dish and the cooking method are identified according to the shooting result.

[0015] As an optional technical solution for a range hood control method, the control method also includes: during the cooking process, using the image detection device to take real-time photos of the stove, and continuously updating the recognition results based on the real-time shooting results; when the updated recognition result is inconsistent with the previous recognition result, re-obtaining the cooking temperature-oil smoke volume curve corresponding to the updated recognition result.

[0016] As an optional technical solution of the range hood control method, identifying the cooking dish according to the shooting result specifically includes: comparing the shooting result with the built-in dish images in the database of the range hood, and identifying the cooking dish according to the comparison result;

[0017] The built-in dish pictures include several pictures of a single dish in different cooking methods and different cooking states, and also include several pictures of a mixed dish composed of several dishes in different cooking methods and different cooking states.

[0018] As an optional technical solution for a range hood control method, identifying the cooking method according to the shooting result specifically includes: identifying a cooking stove according to the shooting result, and identifying the cooking method according to the stove.

[0019] As an optional technical solution of the range hood control method, identifying the cooking method according to the shooting result further includes: identifying the cooking form of the dish in the stove according to the shooting result, and identifying the cooking method in combination with the stove and the cooking form;

[0020] And / or, identifying the cooking method according to the shooting result further includes: identifying the cooking method in combination with the cooking temperature and the stove.

[0021] As an optional technical solution for a range hood control method, identifying the cooking method based on the shooting results also includes: identifying the cooking actions of the cook based on the shooting results, and identifying the cooking method in combination with the cooking actions and the stove.

[0022] As an optional technical solution for a range hood control method, the control method also includes: when in the cooking state, real-time detection of the cooking temperature and oil fume volume, and determination of whether there is a difference between the detected oil fume volume and the predicted oil fume volume under the same cooking conditions; if there is a difference, real-time correction of the cooking temperature-oil fume volume curve based on the detected oil fume volume.

[0023] As an optional technical solution for a range hood control method, the cooking temperature-oil fume volume curve corresponding to the cooking dish and the cooking method is the cooking temperature-oil fume volume curve after the latest correction.

[0024] As an optional technical solution for controlling a range hood, after cooking is completed, it is determined whether the stove temperature, the amount of oil smoke detected, or the standby time after completion meets the preset shutdown conditions. If so, the range hood is turned off.

[0025] As an optional technical solution for a range hood control method, obtaining the cooking temperature-oil fume volume curve specifically includes: obtaining the cooking temperature-oil fume volume curve stored in the range hood database, or obtaining the cooking temperature-oil fume volume curve stored online or shared by other users in a cloud data center.

[0026] As an optional technical solution for a range hood control method, an image detection device with an infrared temperature measurement function is used to detect the cooking temperature.

[0027] As an optional technical solution for a range hood control method, the range hood includes an image detection device for performing image detection, the image detection device including an image detection unit, the image detection unit including a camera and a protective cover fixedly wrapped around the camera, the protective cover having a light-transmitting portion facing the camera, and the image detection unit being rotatable relative to the fume collection hood of the range hood;

[0028] The control method further includes:

[0029] In the cooking state, the light-transmitting portion is exposed to the smoke collecting hood;

[0030] After cooking is finished, the image detection unit is rotated so that the light-transmitting portion is hidden inside the smoke collecting hood.

[0031] As an optional technical solution of the range hood control method, the image detection device further includes a cleaning assembly, the cleaning assembly including a housing installed in the fume hood, the housing having a receiving cavity, a wiping member provided on a cavity wall of the receiving cavity, and the light-transmitting portion capable of being screwed into the receiving cavity and wiped by the wiping member;

[0032] The control method further includes:

[0033] After cooking is finished, the image detection unit is rotated so that the light-transmitting portion is rotated into the accommodating cavity and is wiped clean by the wiping member when passing through the wiping member.

[0034] As an optional technical solution for a range hood control method, the accommodating chamber is sequentially provided with a spraying area, a wiping area, and a waiting area along the rotation direction of the image detection unit; a liquid storage chamber is provided in the housing, the liquid storage chamber stores cleaning liquid, the spraying area is provided with a liquid spray hole connecting the liquid storage chamber and the accommodating chamber, and the wiping member is provided in the wiping area;

[0035] The control method further includes:

[0036] When the light-transmitting portion rotates and passes through the spraying area, the cleaning liquid is sprayed toward the light-transmitting portion through the liquid spraying hole;

[0037] When the light-transmitting portion rotates through the wiping area, the light-transmitting portion is wiped and cleaned by the wiping member;

[0038] When the light-transmitting portion rotates into the waiting area, the image detection unit stops rotating.

[0039] A range hood is provided, wherein the operation of the range hood is controlled by using the control method for the range hood as described above.

[0040] The beneficial effects of the present invention are:

[0041] The control method of the range hood provided by the present invention adjusts the wind force of the range hood by using the current cooking temperature and the obtained cooking temperature-oil fume volume curve. The wind force of the range hood can be effectively adjusted according to the current amount of oil fume and the trend of the future oil fume volume, thereby improving the extraction effect and reducing energy loss. At the same time, since the oil fume volume is predicted by the cooking temperature-oil fume volume curve, compared with directly detecting the oil fume volume, the oil fume volume can be known in advance and the wind force can be adjusted, thereby avoiding the adjustment lag problem caused by detecting first and then adjusting, improving the effect of wind force adjustment, and saving energy consumption.

[0042] The range hood provided by the embodiment of the present invention can improve the adjustment effect, enhance the exhaust capacity of the range hood, and reduce the energy consumption of the range hood by adopting the above-mentioned control method to adjust the wind force. BRIEF DESCRIPTION OF THE DRAWINGS

[0043] Figure 1 is a flow chart of a range hood control method provided in the first embodiment of the present invention;

[0044] Figure 2 is a cross-sectional view of a range hood provided in a second embodiment of the present invention;

[0045] Figure 3 yes Figure 3 A partial enlarged view of point I in the middle;

[0046] Figure 4is a structural diagram of an image detection device provided in Embodiment 2 of the present invention;

[0047] Figure 5 Schematic diagram of the disassembled structure of the image detection device provided in the second embodiment of the present invention;

[0048] Figure 6 is a schematic structural diagram of a cleaning assembly provided in Embodiment 2 of the present invention;

[0049] Figure 7 is a structural schematic diagram of a mounting bracket provided in a second embodiment of the present invention;

[0050] Figure 8 Schematic diagram of the cleaning process of the image detection device provided in the second embodiment of the present invention;

[0051] Figure 9 is a bottom view of the range hood provided in the second embodiment of the present invention;

[0052] Figure 10 is a flow chart of a range hood control method provided by Embodiment 3 of the present invention;

[0053] Figure 11 is a structural diagram of an image detection device provided by a fourth embodiment of the present invention;

[0054] Figure 12 is a cross-sectional view of an image detection device provided by a fourth embodiment of the present invention;

[0055] Figure 13 Schematic diagram of the protection switching process of the protective plate provided in the fourth embodiment of the present invention;

[0056] Figure 14 This is a flow chart of a range hood control method provided in Embodiment 5 of the present invention.

[0057] The following are marked in the figure:

[0058] 10. Image detection device; 20. Fume hood; 201. Hood top plate; 202. Filter plate; 203. Smoke inlet chamber; 204. Maintenance cover; 205. Oil cup; 30. Exhaust pipe; 40. Extraction device; 50. Control panel;

[0059] 1. Image detection unit; 11. Camera module; 111. Camera; 12. Protective cover; 121. Light-transmitting portion;

[0060] 2. Cleaning assembly; 21. Housing; 211. Mounting base; 2111. Mounting port; 212. Cylinder; 213. Receiving chamber; 213a. Spraying area; 213b. Wiping area; 213c. Waiting area; 214. Liquid storage chamber; 215. Liquid filling port; 216. Drain hole; 22. Wiping member; 23. Control lever; 24. Sector gear; 25. Driven gear; 26. Nozzle;

[0061] 3. Drive unit; 31. Drive motor; 32. Shaft connector; 321. First connector; 322. Second connector;

[0062] 4. Protective plate; 41. First protective plate; 42. Second protective plate;

[0063] 5. Install the bracket; 51. Install the top plate; 52. Install the side plate; 53. Support plate; 54. Install the plate; 55. Extend the plate. DETAILED DESCRIPTION

[0064] The present invention will be further described in detail below with reference to the accompanying drawings and examples. It will be understood that the specific embodiments described herein are intended only to illustrate the present invention and are not intended to limit the present invention. It should also be noted that, for ease of description, the accompanying drawings only illustrate portions relevant to the present invention, not all structures.

[0065] In the description of the present invention, unless otherwise expressly specified or limited, the terms "connected," "connected," and "fixed" should be understood in a broad sense. For example, they may refer to fixed connections, detachable connections, or integration; mechanical connections or electrical connections; direct connections or indirect connections through an intermediate medium; and internal communication between two components or interaction between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention in specific circumstances.

[0066] In the present invention, unless otherwise expressly specified or limited, a first feature being "above" or "below" a second feature may include the first and second features being in direct contact, or may include the first and second features being in contact not directly but through another feature between them. Furthermore, a first feature being "above," "above," and "above" a second feature may include the first feature being directly above or obliquely above the second feature, or may simply mean that the first feature is higher in level than the second feature. A first feature being "below," "below," and "below" a second feature may include the first feature being directly below or obliquely below the second feature, or may simply mean that the first feature is lower in level than the second feature.

[0067] In the description of this embodiment, the terms "upper," "lower," "right," and other orientations or positional relationships are based on the orientations or positional relationships shown in the accompanying drawings and are intended solely for ease of description and simplified operation. They do not indicate or imply that the devices or components referred to must have, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on the present invention. Furthermore, the terms "first" and "second" are used solely for descriptive purposes and have no special meanings.

[0068] Example 1

[0069] like Figure 1 As shown, this embodiment provides a range hood control method for adjusting the wind force of the range hood during cooking to improve the oil fume extraction effect and reduce energy consumption.

[0070] The range hood control method provided in this embodiment includes:

[0071] Step S101, starting the range hood;

[0072] Step S102: Start the image detection device to detect the stove;

[0073] In this embodiment, an image detection device is provided on the range hood, and the image detection device includes a camera. The image detection device is installed in the smoke hood of the range hood, and a detection hole is provided at the bottom of the smoke hood. The camera can be exposed to the smoke hood through the detection hole, and the camera is arranged opposite to the stove to take pictures and detect the stove.

[0074] The specific structure of the image detection device, its installation in the smoke hood, and other structures of the range hood can be set with reference to the existing technology and will not be described in detail here.

[0075] Step S103, determine whether it is in the cooking state, if not, execute step S104, if so, execute step S105;

[0076] In this embodiment, it is preferred to determine whether the cooking state is in progress by detecting the stovetop temperature. In this embodiment, the stovetop temperature detection can be performed by an image detection device. In other embodiments, the stovetop temperature can also be detected by a separate temperature sensor, or the amount of oil smoke can also be detected to determine whether the cooking state is in progress.

[0077] Step S104, determining whether the range hood standby time is greater than a preset standby time, if so, executing step S112, if not, returning to step S103;

[0078] By determining whether the range hood's standby time is greater than a preset standby time, the user can avoid forgetting to turn off the range hood, causing the range hood to remain on standby for a long time, thereby saving energy. The preset standby time can be 10 minutes or can be customized as needed, and the present invention does not limit this.

[0079] Step S105: Identify the current cooking dish, cooking method and cooking temperature;

[0080] In this embodiment, the image detection unit 1 is used to identify the dish, cooking method, and cooking temperature. The camera 111 in the image detection unit 1 is an infrared camera 111, which can detect both the image of the captured item and the temperature of the captured item, thereby reducing the number of sensors and simplifying the structure. In other embodiments, the camera 111 in the image detection unit 1 can also be used to capture and identify the dish type and cooking method, and assist the temperature sensor in detecting the cooking temperature.

[0081] In another embodiment, cooking dishes or cooking methods can also be identified by voice recognition or touch input. Under this setting, there is no need to set up an image detection device to detect the stove, and the temperature of the stove can be detected by a temperature sensor, etc. to determine whether it is in the cooking state.

[0082] In this step, the "cooked dish" refers to the type of dish being cooked in the cooktop. The specific identification method is to compare the captured image with the dish images stored in the range hood's database, and then identify the cooked dish based on the comparison results. Specifically, the range hood's built-in database pre-stores images of various dishes in different states. By comparing the captured image with the images in the database, the dish in the captured image can be identified. Image recognition is a conventional technique and will not be further described in this embodiment.

[0083] The built-in dish images include several images of a single dish in different cooking methods and states, as well as several images of a mixed dish composed of several dishes in different cooking methods and states. Specifically, when the captured image is of a single dish, the dish identified is that single dish. For example, in the early stages of cooking, if only eggs are being cooked in the stove, the dish will only be identified as eggs. When the captured image includes several dishes, not only each dish contained therein can be identified, but also the corresponding dish. In this case, the dish refers to the entire dish being cooked. For example, in the later stages of cooking, if eggs and tomatoes are in the stove, the dish can be identified as scrambled eggs with tomatoes. If eggs and leeks are in the stove, the dish can be identified as scrambled eggs with leeks.

[0084] That is, in this embodiment, the database not only pre-stores pictures of various dishes in different states, but also pre-stores various recipes and images of the corresponding dishes in each recipe, so that the recognition results can be adjusted according to the different stages of cooking to improve the accuracy of recognition.

[0085] Cooking methods include steaming, stir-frying, stewing, and boiling, which are commonly used in daily life. Identifying the cooking method based on the captured image includes identifying the cooking stove based on the captured image and identifying the cooking method based on the stove. For example, stir-frying is typically done in a wok, while steaming is typically done in a steamer. Identifying the cooking method based on the stove can simplify the identification process.

[0086] Furthermore, identifying the cooking method based on the photographed results further includes: identifying the cooking state of the dish in the cooker based on the photographed results, and identifying the cooking method based on the cooker and the cooking state. That is, the cooking method can be more accurately identified by identifying the type of cooker and the state of the dish in the cooker.

[0087] More preferably, the cooking method can be more accurately identified by identifying the stove type, dish status and cooking temperature. For example, when the cooking method is stewing, the cooking temperature can be combined to specifically identify the cooking method as slow stewing over low heat, stewing over medium heat or stewing over high heat.

[0088] Optionally, the cooking action of the cook may be identified by image detection, and the cooking method may be identified by combining the cooking action and the stove.

[0089] Step S106: retrieve the cooking temperature-oil smoke volume curve corresponding to the cooking dish and cooking method from the database according to the cooking dish and cooking method;

[0090] Cooking temperature-oil smoke volume curves for different dishes and different cooking methods are pre-stored in the database of the range hood controller.

[0091] The cooking temperature-oil smoke volume curve in the database can be preset at the time of production, retrieved from a cloud database via the Internet, or collected through self-learning algorithms or other algorithms during the use of the range hood. The data in the cloud database can be data uploaded and shared by different users, or a shared database obtained by sharing the databases of range hoods from different users in the cloud space.

[0092] That is, in this embodiment, obtaining the cooking temperature-oil fume volume curve specifically includes: obtaining the cooking temperature-oil fume volume curve stored in the range hood database, or obtaining the cooking temperature-oil fume volume curve stored online or shared by other users in the cloud data center.

[0093] To reduce the difficulty of adjustment, the cooking temperature-oil smoke yield curve can optionally be a curve corresponding to different cooking temperature ranges. This divides the cooking temperature into several continuous intervals, each corresponding to a different oil smoke yield value. This reduces the difficulty of creating the cooking temperature-oil smoke yield curve and also avoids the problem of frequent wind speed adjustment caused by adjusting the cooking temperature. The number of cooking temperature intervals and the length of each interval can be specifically set according to different dishes and cooking methods, and the present invention does not limit this.

[0094] Step S107: Predicting the amount of oil smoke at the current cooking temperature based on the currently detected cooking temperature and the obtained cooking temperature-oil smoke amount curve;

[0095] Since different types of dishes and different dishes in different cooking states have different amounts of oil smoke, by presetting the cooking temperature-oil smoke amount curve, the amount and density of oil smoke of the dishes currently being cooked can be preliminarily predicted, thereby providing a basis for adjusting the wind speed of the range hood.

[0096] Step S108: adjusting the wind speed of the range hood according to the predicted amount of oil smoke;

[0097] Since different dishes use different cooking methods and generate different amounts of oil smoke at different cooking stages, the wind force of the range hood is adjusted by the current cooking temperature and the obtained cooking temperature-oil smoke volume curve. The wind force of the range hood can be effectively adjusted according to the current amount of oil smoke and the future trend of oil smoke volume, thereby improving the extraction effect and reducing energy loss. At the same time, since the oil smoke volume is predicted by the cooking temperature-oil smoke volume curve, compared with directly detecting the oil smoke volume, the oil smoke volume can be known in advance and the wind force can be adjusted, avoiding the adjustment lag problem caused by detection first and then adjustment, improving the effect of wind force adjustment, and saving energy.

[0098] In this embodiment, wind speed regulation can be implemented in a stepless manner. To optimize adjustment, the optimal wind speed values for different oil fume volumes can be determined based on the range hood model and structure through experiments, simulations, or calculations. This can then be used to generate a fume volume-wind speed curve. This fume volume-wind speed curve can then be integrated into the control system. During adjustment, the desired wind speed value is determined based on the predicted oil fume volume and the fume volume-wind speed curve.

[0099] In another embodiment, the wind speed can be adjusted in stages, that is, the wind speed can be set to multiple different levels, each level corresponding to a specific wind speed value, and each level corresponding to a different range of oil smoke volume. Based on the predicted oil smoke volume, the level value corresponding to the oil smoke volume is obtained, and then adjustment is performed.

[0100] Step S109, determine whether cooking is finished, if not, return to step S105, if so, execute step S110;

[0101] Step S110: detecting the stove temperature and / or the amount of cooking fume;

[0102] Step S111: determine whether the preset shutdown condition is met, if so, execute step S112, if not, return to step S110;

[0103] In this embodiment, the preset shutdown conditions are: whether the stovetop temperature is lower than a preset temperature, whether the oil smoke volume is lower than a preset oil smoke volume, or whether the standby time is longer than a preset time. This setting can achieve extended shutdown of the range hood, ensuring sufficient oil smoke extraction, preventing oil smoke overflow, improving the range hood's extraction efficiency, and enhancing the user experience.

[0104] In this embodiment, if the cooking process continues, the method returns to step S105. This ensures that the recognition of the dish and cooking method, as well as the monitoring of the cooking temperature, can be updated in real time, thereby enabling the updated recognition results to be determined based on the captured images. Specifically, in this embodiment, the control method further includes: during the cooking process, using an image detection device to capture real-time images of the cooktop, and continuously updating the recognition results based on the real-time capture results. When the updated recognition result is inconsistent with the previous recognition result, a cooking temperature-oil smoke volume curve corresponding to the updated recognition result is reacquired. The reacquired cooking temperature-oil smoke volume curve is used in subsequent steps, thereby further ensuring the accuracy of the recognition of the dish and cooking method.

[0105] Step S110: Turn off the range hood.

[0106] The control method provided in this embodiment identifies the cooking dishes and cooking methods, and predicts the amount of oil smoke in real time based on the existing cooking temperature-oil smoke volume, and adjusts the wind speed value according to the predicted amount of oil smoke. This can improve the accuracy of wind speed value adjustment and avoid problems such as insufficient suction or excessive suction force caused by adjustment lag, thereby improving the oil fume extraction effect of the range hood and reducing energy waste.

[0107] Furthermore, during the cooking process, not only is a prediction made in real time based on the cooking temperature-oil smoke volume curve, but the oil smoke volume can also be detected in real time to obtain the oil smoke volume curve corresponding to the cooking temperature in actual cooking, and the oil smoke volume detection value at a certain cooking temperature actually obtained is compared with the oil smoke volume prediction value at the cooking temperature, and the deviation is corrected, and the oil smoke volume preset value under the same cooking conditions stored in the database is replaced by the oil smoke volume detection value. That is, according to the actual detection results during the cooking process, the cooking temperature-oil smoke volume curve is corrected and updated in real time, and the corrected and updated cooking temperature-oil smoke volume curve is applied to wind power adjustment.

[0108] This setting can continuously correct the cooking temperature-oil smoke volume curve in the database, so that the cooking temperature-oil smoke volume curve can better meet the personalized needs of users and better fit the cooking habits of cooks.

[0109] This embodiment also provides a range hood that is controlled by the above-mentioned range hood control method to improve the accuracy of wind control, enhance the exhaust capacity, and reduce energy consumption.

[0110] Example 2

[0111] like Figure 2-Figure 4 As shown, this embodiment provides a range hood, which includes a smoke hood 20, a smoke exhaust pipe 30 arranged on the top of the smoke hood 20, an exhaust device 40 arranged inside the exhaust pipe 30, and an image detection device 10 installed on the smoke hood 20. The smoke hood 20 is used to fold the range hood, the exhaust device 40 is used to extract the smoke from the smoke hood 20 to the outside, and the image detection device 20 is used to detect the stove.

[0112] The image detection device 10 is installed inside the fume hood 20. A control panel 50 is provided on the front side of the fume hood 20. The image detection device 10 is installed in the non-oil path area inside the fume hood 20, that is, near the control panel 50. The bottom surface of the fume hood 20 has a detection hole, through which the detection end of the image detection device extends outside the fume hood 20, allowing the image detection device 10 to perform image detection of the cooktop.

[0113] In this embodiment, the range hood is preferably a top-suction double-chamber range hood, that is, the smoke hood 20 is divided into two left and right smoke inlet chambers 203 by a filter plate 202, and the image detection device 10 is preferably located between the two smoke inlet chambers 203, so as to avoid the contamination of the image detection device 10 by oil smoke to the greatest extent.

[0114] like Figures 4 to 8 As shown, the image detection device 10 provided in this embodiment includes an image detection unit 1 and a cleaning assembly 2. The image detection unit 1 includes a camera module 11 and a protective cover 12 fixedly wrapped around the camera module 11. The camera module 11 includes a camera head 111. The protective cover 12 has at least a light-transmitting portion 121 facing the camera head 111. The cleaning assembly 2 includes a housing 21 and a wiper 22. The housing 21 has a receiving cavity 213. The wiper 22 is disposed on the cavity wall of the receiving cavity 213. The image detection unit 1 is rotatably connected to the housing 21 so that the light-transmitting portion 121 can be selectively rotated into the receiving cavity 213 and wiped and cleaned by the wiper 22. At the same time, the light-transmitting portion 121 can be completely exposed from the housing 21.

[0115] The image detection device 10 provided in this embodiment is provided with a shell 21 that is rotatably connected to the image detection unit 1, so that when the image detection device 10 is not in use, the light-transmitting part 121 can be rotated into the accommodating cavity 213, thereby hiding the camera 111 and the light-transmitting part 121, reducing the pollution of the light-transmitting part 121 by external dust, oil stains, etc., thereby ensuring the detection accuracy of the image detection unit 1 and reducing the maintenance difficulty of the image detection device 10; at the same time, by providing a wiping member 22 in the accommodating cavity 213, when the light-transmitting part 121 is rotated into the accommodating cavity 213, the wiping member 22 can wipe the outer surface of the light-transmitting part 121 to ensure the cleanliness of the surface of the light-transmitting part 121, thereby further ensuring the detection accuracy of the image detection unit 1, and realizing self-cleaning of the light-transmitting part 121, without manual wiping and cleaning of the protective cover 12, thereby improving the cleaning efficiency of the image detection unit 1 and reducing the frequency of disassembly and assembly.

[0116] In order to improve the cleaning automation of the image detection device 10, the image detection device 10 further includes a drive unit 3, which is connected to the housing 21 or the image detection unit 1 to achieve mutual rotation between the image detection unit 1 and the housing 21. In this embodiment, the drive unit 3 is connected to the image detection unit 1, that is, when the image detection device 10 is installed and used, the housing 21 is fixed relative to the mounting structure, such as the fume hood 20 of a range hood, thereby facilitating the installation convenience of the image detection device 10 on the mounting structure. At the same time, when the mounting structure is the fume hood 20, since the size of the image detection unit 1 is smaller than that of the housing 21, the space required for rotation can be reduced, and the size of the detection hole on the fume hood 20 can be reduced, thereby reducing the exposure of the structure.

[0117] The camera 111 is preferably an infrared camera. This camera can not only capture images but also obtain temperature information of the subject being photographed. It also reduces the impact of light on the image, improving the quality of the image and its adaptability to the environment. The camera module 11 also includes a circuit board electrically connected to the camera 111 and a bracket connected to the protective cover 12. The camera module 11 can be an existing mature product, and its structure is not limited or detailed here.

[0118] The protective cover 12 is preferably a spherical structure, and the optical axis of the camera 111 passes through the center of the spherical structure. The area opposite the spherical structure and the camera 111 forms a light-transmitting portion 121, so that the light-transmitting portion 121 is a spherical arc structure with an opening facing the sphere, which can better realize the diffusion of light, ensure the field of view of the camera 111, and improve the shooting quality.

[0119] Preferably, on any plane passing through the optical axis, the central angle of the cross-sectional arc formed by the light-transmitting portion 121 on the plane is a preset angle, ensuring that the field of view of the camera 111 is the same in all directions. Furthermore, the preset angle is set to 45° to 180°, with 60° being the optimal angle.

[0120] The protective cover 12 is preferably made of transparent plastic, which has good light transmittance, low cost and is not easy to damage. The transparent plastic is preferably made of acrylic material, which has good light-guiding performance. PV, ABS and other materials can also be used, and this embodiment does not limit this. The protective cover 12 is spaced apart from the end of the camera 111 to avoid squeezing and scratching the camera 111, thereby providing better protection for the camera 111. The installation of the camera module 11 in the protective cover 12 can refer to the existing technology. This is not the focus of the present invention and will not be described here.

[0121] In other embodiments, only the light-transmitting portion 121 may be spherically arc-shaped, with the corresponding center of the spherical arc located on the extension line of the optical axis. Alternatively, only the light-transmitting portion 121 may be transparent, while the rest of the protective cover 12 may be opaque.

[0122] Preferably, when the image detection device 10 is installed in the smoke hood 20 and the light-transmitting portion 121 is rotated to be exposed outside the smoke hood 20, the end face of the camera 111 is flush with the lower end of the detection hole, so that the shooting range of the camera 111 can cover the entire stove.

[0123] The image detection unit 1 is rotatably connected to the housing 21 via a rotating shaft, and the drive unit 3 is transmission-connected to the rotating shaft, thereby simplifying the overall structure of the image detection unit 1 and improving the convenience of connecting the drive unit 3 and the image detection unit 1. That is, in this embodiment, the rotating shaft is rotatably connected to the housing 21 and is fixedly connected to the image detection unit 1. The extension line of the rotating shaft passes through the center of the protective cover 12 to ensure that the protective cover 12 rotates around its central axis. The axis of the rotating shaft is preferably arranged perpendicular to the optical axis to ensure that the rotation of the rotating shaft can drive the camera 111 and the light-transmitting portion 121 to rotate around the rotating shaft. In other embodiments, the axis of the rotating shaft can also be arranged obliquely to the optical axis, as long as the camera 11 and the corresponding light-transmitting portion 121 can be transferred into the accommodating cavity 213.

[0124] In this embodiment, the rotating shaft is connected to the protective cover 12 to prevent the rotating shaft from extending into the interior of the protective cover 12 and connecting with the camera module 11, thereby simplifying the connection structure between the rotating shaft and the image detection unit 1 and avoiding openings or groove structures on the outer surface of the protective cover 12, thereby ensuring the outer integrity of the protective cover 12 and preventing oil smoke or dust from entering the protective cover 12.

[0125] Preferably, two rotating shafts are arranged at intervals along their axial direction, the two rotating shafts are coaxially arranged, and the first end of each rotating shaft is connected to the protective cover 12, and the second end of each rotating shaft is rotatably connected to the outer shell 21, thereby enabling the opposite sides of the image detection unit 1 to be supported on the outer shell 21, thereby improving the force stability of the image detection unit 1 and improving the rotational stability of the image detection unit 1.

[0126] Optionally, bosses are provided on opposite sides of the protective cover 12, and the bosses are provided in a one-to-one correspondence with the rotating shaft, and a shaft socket is provided on the bosses, and the first end of the rotating shaft is inserted into the shaft socket, and the fit between the rotating shaft and the shaft socket is preferably an interference fit, and a stop surface is cut on the outer peripheral wall of the first end of the rotating shaft, and a stop convex portion is provided on the inner wall of the shaft socket that matches the stop surface. The relative rotation between the protective cover 12 and the rotating shaft is limited by the fit between the stop surface and the stop convex portion, and the axial position of the rotating shaft and the protective cover 12 can be further locked by a locking screw provided on the boss. It can be understood that the above-mentioned connection structure between the protective cover 12 and the rotating shaft is only an exemplary structure, and other existing forms that can realize the connection between the shaft and the spherical structure can be applied to this embodiment, such as the rotating shaft and the protective cover 12 being integrally formed or welded, and this embodiment is no longer limited to this.

[0127] The accommodating cavity 213 preferably has an arc-shaped main cavity wall, which is arranged outside the protective cover 12 and coaxially with the rotation axis. The wiper 22 is arranged on the main cavity wall, so that the image detection unit 1 can be partially accommodated in the accommodating cavity 213 while reducing the size of the housing 21. More preferably, the accommodating cavity 213 has a semicircular cross-sectional profile, so that substantially half of the protective cover 12 can be accommodated in the accommodating cavity 213.

[0128] Furthermore, the outer shell 21 is a semi-cylindrical structure, comprising a mounting base 211 parallel to the rotation axis and a semi-cylindrical barrel 212. The barrel 212 is connected to the mounting base 211 at both ends along its circumferential direction. The mounting base 211 and the barrel 212 together form the aforementioned accommodating cavity 213, and the inner wall of the barrel 212 forms the aforementioned main cavity wall. This shape setting of the outer shell 21 can reduce the overall size of the outer shell 21, improve the structural aesthetics, and facilitate the placement of structures such as the wiper 22 within the accommodating cavity 213. In other embodiments, the outer shell 21 can also be hemispherical or other shapes that can cover part of the structure of the protective cover 12.

[0129] The mounting base 211 is provided with a mounting opening 2111, through which the image detection unit 1 is inserted. Specifically, axial holes are provided on the walls on opposite sides of the mounting opening 2111, and the second ends of the two rotating shafts are rotatably mounted in the corresponding axial holes. Preferably, the mounting opening 2111 is a circular hole, and the aperture of the mounting opening 2111 is equal to or slightly larger than the outer diameter of the large circle of the protective cover 12. This arrangement can reduce the gap between the protective cover 12 and the wall of the mounting opening 2111 after the image detection unit 1 is installed, thereby reducing the probability of external grease entering the accommodating cavity 213.

[0130] Preferably, at least one rotating shaft extends out of the outer side of the housing 21 in a direction away from the protective cover 12 to facilitate connection of the rotating shaft with the driving unit 3 , wherein one rotating shaft is connected to the driving unit 3 .

[0131] In this embodiment, the drive unit 3 includes a drive motor 31. The drive shaft of the drive motor 31 is coaxially arranged with the rotating shaft, and the drive shaft is connected to the rotating shaft via a shaft connector 32. Using the drive motor 31 to drive the rotating shaft to rotate can reduce the overall structure of the image detection device 10 and reduce the space occupied by the image detection device 10. The drive motor 31 is preferably a drive motor that can be directly driven and has a small size. In other embodiments, the drive motor 31 can also adopt a reduction motor or other existing drive transmission structure that can drive the rotating shaft to rotate, and the present invention is not specifically limited to this.

[0132] In this embodiment, the shaft connector 32 includes a first connecting portion 321 and a second connecting portion 322. The first connecting portion 321 is fixedly connected to the drive shaft, and the second connecting portion 322 is connected to the rotating shaft. The first connecting portion 321 and the second connecting portion 322 are detachably connected. Specifically, a circular groove is formed on the second connecting portion 322, and a plurality of limiting grooves are provided on the circumference of the circular groove. The first connecting portion 321 includes a cylindrical main body and a locking protrusion protruding radially outward from the main body. The locking protrusion and the limiting groove are provided in a one-to-one correspondence, and the main body is snapped into the circular groove, and the locking protrusion is snapped into the limiting groove to prevent relative rotation between the first connecting portion 321 and the second connecting portion 322. The first connecting portion 321 and the second connecting portion 322 are locked by a locking screw.

[0133] It is understandable that the structure of the above-mentioned shaft connector 32 is only an exemplary structure, and other existing structures that can achieve the connection between two shafts are within the protection scope of the present invention.

[0134] The drive unit 3 is preferably located outside the housing 21, thereby reducing the size of the housing 21. To facilitate installation of the drive unit 3 on an external structure, the drive unit 3 further includes a mounting bracket 5, which is connected to the housing 21 of the drive motor 31 and has a mounting portion for connecting to the external structure.

[0135] In this embodiment, the mounting bracket 5 includes a top mounting plate 51 and side mounting plates 52 connected to opposite sides of the top mounting plate 51. The top mounting plate 51 and the two side mounting plates 52 together form a U-shaped structure. The top mounting plate 51 and the two side mounting plates 52 respectively engage the side walls of the drive motor 31, thereby enabling the mounting bracket 5 to clamp the drive motor 31. The side mounting plates 52 and / or the bottom mounting plate 211 are detachably connected to the outer side walls of the drive motor 31.

[0136] Furthermore, a support plate portion 53 extends from one end of the mounting side plate portion 52 away from the mounting top plate portion 51 in a direction toward the other mounting side plate portion 52. The two support plates 53 are arranged opposite each other and spaced apart. The support plates 53 are in contact with the other side surface of the drive motor 31, thereby better supporting and securing the drive motor 31. An extension plate portion 55 extends vertically downward from each support plate portion 53. The distal end of the extension plate portion 55 is connected to a mounting plate portion 54. The two mounting plates 54 extend away from each other and are provided with mounting holes.

[0137] The mounting plate 54 is detachably connected to the bottom of the fume hood 20. Since the bottom of the fume hood 20 is typically tilted, this tilted mounting plate 54 ensures connection to the bottom of the fume hood 20 while also ensuring the horizontal placement of the drive shaft of the drive motor 31. Specifically, in this embodiment, the top mounting plate 51 and support plate 53 are arranged horizontally and spaced apart, while the side mounting plates 52 are arranged vertically.

[0138] To improve the cleanliness of the light-transmitting portion 121 by the cleaning assembly 2, in this embodiment, the housing 21 has a liquid storage chamber 214. The liquid storage chamber 214 stores cleaning liquid. The liquid storage chamber 214 has a liquid spray hole that communicates with the accommodating chamber 213. A control element can control the liquid spray hole to spray the cleaning liquid toward the light-transmitting portion 121 that is positioned within the accommodating chamber 213. This arrangement allows the cleaning liquid to be sprayed onto the surface of the protective cover 12 through the liquid spray hole. As the surface sprayed with the cleaning liquid passes through the wiping element 22, the surface of the protective cover 12 is cleaned by the combined action of the cleaning liquid and the wiping element 22.

[0139] In this embodiment, the liquid storage chamber 214 is disposed within the cylindrical portion 212, which is an annular cavity. The main cavity wall is sequentially provided with a liquid spraying area 213a and a wiping area 213b along the rotational direction of the protective cover 12. The liquid spraying area 213a is provided with a plurality of liquid spraying holes, and the wiping member 22 is disposed in the wiping area 213b. This arrangement ensures that after the light-transmitting portion 121 is rotated into the accommodating cavity 213, it is first sprayed with cleaning liquid by the liquid spraying area 213a, and then wiped by the wiping area 213b, further improving the cleaning effect.

[0140] Furthermore, a nozzle 26 is provided at the liquid spray hole, which can be opened by the squeezing action of the fluid. The provision of the nozzle 26 can disperse the cleaning liquid in a mist-like manner at the spraying location, increase the spray coverage of the light-transmitting portion 121, improve the cleaning liquid spraying effect, and thus improve the cleaning effect of the light-transmitting portion 121. The nozzle 26 is provided in a one-to-one correspondence with the liquid spray hole.

[0141] In this embodiment, the control member includes a control lever 23. After the rotating shaft rotates a predetermined angle from its operating state, the control lever 23 compresses the wall of the liquid spraying area 213a, causing the cleaning liquid to be ejected through the liquid spraying orifice. This method of squeezing the liquid spraying area 213a eliminates the need for electronic controls such as pumps or valves to control the ejection of the cleaning liquid, resulting in lower costs, reduced space requirements, and a significant simplification of the structure of the image detection device 10.

[0142] In this embodiment, the working state is the position when the camera module 11 is in a normal working state. In the working state, the light-transmitting portion 121 is located on the side of the protective cover 12 away from the outer shell 21, so that the light-transmitting portion 121 is completely exposed. Preferably, in the working state, the optical axis of the camera 111 is perpendicular to the mounting base portion 211. The set rotation angle is the angle required for the light-transmitting portion 121 to rotate from the working state to the beginning of entering or partially entering the accommodating cavity 213. In this embodiment, the set rotation angle is preferably 60 to 90°. In other embodiments, the set rotation angle can be specifically selected according to the specific shape of the outer shell 21 and the center angle of the light-transmitting portion 121.

[0143] In this embodiment, the control rod 23 is in transmission connection with the rotating shaft so that the control rod 23 moves to selectively squeeze the cavity wall of the cleaning liquid spraying area 213a. Preferably, the control rod 23 is arranged along the radial direction of the barrel 212 and is rotatably connected to the housing 21, so that the control rod 23 can selectively squeeze the liquid spraying area 213a by rotating the control rod 23.

[0144] Specifically, a sector gear 24 is fixedly sleeved on the rotating shaft, and the control rod 23 is rotatably connected to the housing 21 through the mounting shaft. A driven gear 25 is fixedly sleeved on the mounting shaft. When the image detection device 10 is in working state, the sector gear 24 and the driven gear 25 are out of contact. When the rotating shaft rotates to a set rotation angle, the sector gear 24 engages with the driven gear 25, driving the control rod 23 to rotate in the opposite direction, so that the end of the control rod 23 rotates to the spraying area 213a.

[0145] The above-described connection method between the rotating shaft and the control rod 23 is simple in structure, easy to control, and takes up little space. In other embodiments, the rotating shaft can also be connected to the control rod 23 via a connecting rod or a crank slider structure, as long as the rotating shaft can drive the control rod 23 to move through rotation so that the control rod 23 selectively squeezes the cavity wall of the liquid spraying area 213a.

[0146] The driven gear 25 is preferably a complete gear to ensure the reliability of the meshing between the sector gear 24 and the driven gear 25. In other embodiments, the driven gear 25 may also be a gear with a sector structure.

[0147] In order to restore the control rod 23 to its initial position where it does not press against the wall of the spraying area 213a, the cleaning assembly 2 further includes an elastic member (not shown) for maintaining or returning the control rod 23 to its initial position. In this embodiment, the elastic member is preferably a torsion spring, and in other embodiments, the elastic member may be a tension spring.

[0148] Preferably, in the operating state, the control rod 23 is positioned directly opposite the wiping area 213b to reduce the rotation angle required for the control rod 23 to rotate to the liquid spraying area 213a. In other embodiments, in the operating state, the control rod 23 may be positioned on the side of the liquid spraying area 213a away from the wiping area 213b. In this case, since the control rod 23 rotates in the same direction as the rotating shaft, an intermediate gear should be added between the driven gear 25 and the sector gear 24 to facilitate direction reversal.

[0149] The sector gear 24 is preferably mounted on a rotating shaft not provided with the drive motor 31 and is located outside the housing 21 to minimize interference between components. One end of the control rod 23 is connected to the mounting shaft, and the other end of the control rod 23 defines a limiting slot. The limiting slot has an L-shaped wall, one side of which abuts the inner surface of the barrel 212, and the other side of the wall abuts the end surface of the housing 21. This effectively guides the rotation of the control rod 23 and prevents deflection of the control rod 23 in the axial direction of the mounting shaft during rotation.

[0150] In order to prevent the accumulation of cleaning liquid in the accommodating chamber 213, a drainage hole 216 is provided at the lowest point of the cavity wall of the accommodating chamber 213, and the drainage hole 216 is located below the liquid spraying hole. Setting the drainage hole 216 at the lowest point of the accommodating chamber 213 is conducive to the collection of cleaning waste liquid and improves the waste liquid discharge effect. Specifically, a drainage hole 216 is provided at the position of the installation base plate portion 211 corresponding to the liquid spraying area 213a, which is used to discharge the cleaning waste liquid. Furthermore, a liquid collecting trough is recessed on the inner surface of the installation base plate portion 211, and a drainage hole 216 is provided at the bottom of the trough. The liquid collecting trough is a conical trough with a larger upper portion and a smaller lower portion to improve the gathering effect of the cleaning waste liquid.

[0151] like Figure 2 and Figure 9As shown, because the image detection device 10 is located between the two smoke inlet chambers 203 and at the front end of the bottom of the smoke hood 20, the cleaning waste liquid discharged from the drainage hole 216 slides downward along the bottom surface of the smoke hood 20 into the oil cup 205. The cleaning waste liquid flowing out of the drainage hole 216 can perform a secondary cleaning on the inner surface of the smoke hood 20, thereby improving the utilization efficiency of the cleaning liquid. While cleaning the bottom of the smoke hood 20 and the oil cup 205, the waste liquid can be better collected.

[0152] In order to facilitate the addition of cleaning liquid to the liquid storage chamber 214, a liquid adding port 215 is opened on the outer wall of the shell 21, and the liquid adding port 215 is connected to the liquid storage chamber 214. In the non-liquid adding state, the liquid adding port 215 is blocked by a structure such as a rubber plug. When cleaning liquid needs to be added, the rubber plug is opened to achieve the addition of cleaning liquid.

[0153] Preferably, a liquid level detection device is also provided in the liquid storage chamber 214 to detect the liquid level in the liquid storage chamber 214, thereby reminding the user whether to add cleaning liquid. The liquid level detection device can adopt an existing mature product and will not be described in detail here.

[0154] In order to facilitate the addition of cleaning liquid, a maintenance port is provided on the top plate 201 of the smoke hood 20 at a position corresponding to the image detection device 10. A maintenance cover 204 is detachably provided at the maintenance port. The maintenance port is arranged opposite to the liquid adding port 215. The user can add cleaning liquid and disassemble and assemble the image detection device 10 through the maintenance port. The maintenance cover 204 is preferably rotatably connected to the top plate 201 to facilitate opening or closing the maintenance cover 204. The maintenance cover 204 and the top plate 201 can also be connected by a sliding connection or a screw detachable connection. The connection structure of the maintenance cover 204 can refer to the existing technology and is not limited in this embodiment.

[0155] The wiping member 22 is preferably made of a sponge, foam, or cotton strip to improve the wiping effect on the light-transmitting portion 121. The inner surface of the wiping member 22 is preferably a spherical arc surface that matches the protective cover 12 to improve the cleaning effect on the protective cover 12. Furthermore, the thickness of the wiping member 22 is slightly larger than the gap between the protective cover 12 and the main cavity wall to ensure a certain pressure between the wiping member 22 and the outer surface of the protective cover 12, thereby ensuring effective wiping.

[0156] Preferably, the accommodating cavity 213 is also formed with a waiting area 213c, which is located on the side of the wiping member 22 away from the spraying area 213a, and when the light-transmitting portion 121 rotates to the waiting area 213c, the light-transmitting area is disengaged from the wiping member 22, thereby preventing the wiping member 22 from squeezing the light-transmitting portion 121 for a long time. At the same time, the relative rotation between the two can also realize the comprehensive cleaning of the light-transmitting portion 121 by the wiping member 22, thereby preventing dirt from sticking to the light-transmitting portion 121 and ensuring the cleaning effect of the light-transmitting portion 121.

[0157] Preferably, in this embodiment, the central angles corresponding to the waiting area 213c, the wiping area 213b and the spraying area 213a are all the above-mentioned preset angles. In other embodiments, the central angles corresponding to the waiting area 213c, the wiping area 213b and the spraying area 213a can be set according to needs.

[0158] It is understandable that the range hood can also be a top-suction single-chamber range hood or a side-suction range hood. The present invention does not limit the type and specific structure of the range hood to which the image detection device is applied, as long as the image detection device 10 is installed in the non-oil path area of the fume hood 20 and close to the highest position of the bottom surface of the fume hood 20. At the same time, in this embodiment, when the image detection device 10 is in working condition, the camera 111 is located above the stove and its optical axis is set vertically to better capture the image of the entire stove. When the range hood is a side-suction range hood, the installation position of the image detection device 10 can be specifically set according to the specific structure of the range hood, as long as it is able to capture the image of the stove.

[0159] The other structures of the range hood can refer to the prior art, which is not the focus of the present invention and will not be described here in detail.

[0160] Example 3

[0161] like Figure 10 As shown, this embodiment provides a range hood control method, which is applied to the range hood provided in the second embodiment and is a further improvement based on the control method provided in the first embodiment.

[0162] Specifically, the range hood control method provided in this embodiment includes the following steps:

[0163] Step S201, starting the range hood;

[0164] Step S202: determine whether the image detection unit is in working state, if not, execute step S203, if yes, execute step S204;

[0165] In this embodiment, the working state of the image detection unit is the state in which the light-transmitting portion is exposed from the housing and the camera is facing the stove, and the standby state of the image detection unit is the state in which the light-transmitting portion is rotated to the waiting area in the accommodating cavity.

[0166] Step S203, rotating the image detection unit to a working state;

[0167] Step S204: Start the image detection device to detect the stove

[0168] Step S205: determine whether it is in the cooking state, if not, execute step S206, if yes, execute step S207;

[0169] Step S206, determining whether the range hood standby time is greater than a preset standby time, if so, executing step S214, if not, returning to step S205;

[0170] Step S207: Identify the current cooking dish, cooking method and cooking temperature;

[0171] Step S208: retrieve the cooking temperature-oil smoke volume curve corresponding to the cooking dish and cooking method from the database according to the cooking dish and cooking method;

[0172] Step S209: Predicting the amount of oil smoke at the current cooking temperature based on the currently detected cooking temperature, i.e., the obtained cooking temperature-oil smoke amount curve;

[0173] Step S210: adjusting the wind speed of the range hood according to the predicted amount of oil smoke;

[0174] Step S211, determine whether cooking is finished, if not, return to step S207, if so, execute step S212;

[0175] Step S212: detecting the stove temperature and / or the amount of cooking fume;

[0176] Step S213: determine whether the preset shutdown condition is met, if so, execute step S214, if not, return to step S212;

[0177] Step S214: Turn off the range hood and turn the image detection unit 1 to a standby state.

[0178] That is, the control method of the range hood provided in this embodiment, steps S204 to S213 thereof are substantially the same as those in the first embodiment, with only some steps being different.

[0179] The range hood control method provided in this embodiment can control the image detection device 10 to be in an operating state capable of performing image detection during cooking. When not cooking, the device can be hidden within the fume hood 20, providing protection for the image detection device 10, reducing contamination of the image detection device 10 by cooking fumes or external impurities, and improving the image detection accuracy of the camera 111. Furthermore, when cooking is complete, the image detection unit 1 is switched from the operating state to the standby state, allowing the wiper to clean the light-transmitting portion 121, thereby ensuring the image detection accuracy of the image detection unit 1.

[0180] Furthermore, since the accommodating chamber is provided with a liquid spraying area, a wiping area, and a waiting area, when the light-transmitting portion switches from the working state to the standby state, it passes through the liquid spraying area, the wiping area, and the waiting area in sequence. That is, the control method provided in this embodiment further includes:

[0181] When the light-transmitting portion rotates and passes through the spraying area, the cleaning liquid is sprayed toward the light-transmitting portion through the spraying holes;

[0182] When the light-transmitting portion rotates through the wiping area, the light-transmitting portion is wiped and cleaned by the wiping member;

[0183] When the light-transmitting portion is rotated into the waiting area, the image detection unit stops rotating.

[0184] Example 4

[0185] This embodiment provides a range hood, and the basic structure of the range hood provided in this embodiment is the same as that of the first embodiment, with only some differences in the structure of the image detection device. This embodiment will not repeat the same structure as that of the second embodiment.

[0186] like Figure 11-13 As shown, the image detection device 10 provided in this embodiment includes an image detection unit 1, a cleaning assembly 2, and a protective plate 4. The cleaning assembly 2 includes a housing 21 and a wiper 22. The housing 21 has a receiving cavity 213, and the wiper 22 is arranged on the cavity wall of the receiving cavity 213. The image detection unit 1 is fixed relative to the housing 21 and includes a camera module 11 and a protective cover 12 fixedly wrapped around the camera module 11. The camera module 11 includes a camera 111. The protective cover 12 has at least a light-transmitting portion 121 facing the camera 111, and the light-transmitting portion 121 is exposed from the housing 21. The protective plate 4 is made of a transparent material, and at least two are arranged along the circumference of the protective cover 12. Each protective plate 4 is rotatably connected to the housing 21, so that any protective plate 4 can be selectively screwed into the receiving cavity 213 and wiped clean by the wiper 22, or rotated to the side of the light-transmitting portion 121 away from the camera 111.

[0187] The image detection device 10 provided in this embodiment provides a transparent protective plate 4, and the protective plate 4 can be rotated to the side of the light-transmitting portion 121 away from the camera 111, so that the protective plate 4 can protect the light-transmitting portion 121, reduce the pollution of the light-transmitting portion 121 by external dust, oil stains, etc., thereby reducing the cleaning frequency of the image detection unit 1; by providing a shell 21 and a accommodating cavity 213, when one of the protective plates 4 is in the protective position of protecting the light-transmitting portion 121, the remaining protective plates 4 can be rotated into the accommodating cavity 213, reducing the pollution of the remaining protective plates 4 by dust, oil stains, etc.; by providing a wiping member 22, the protective plate 4 screwed into the accommodating cavity 213 can be wiped and cleaned by the wiping member 22, so that when the protective plate 4 in the accommodating cavity 213 is rotated to the protective position, its clarity can be guaranteed, and the protective plate 4 rotated from the protective position into the accommodating cavity 213 It can be cleaned, that is, it can ensure that the protective plates 4 in the protective position are all the protective plates 4 cleaned by the wiping member 22 , thereby effectively ensuring the detection accuracy of the image detection unit 1 .

[0188] In order to improve the cleaning automation of the image detection device 10 , the image detection device 10 further includes a driving unit 3 , which is drivingly connected to the protective plate 4 to drive the protective plate 4 to rotate.

[0189] The structure of the image detection unit 1, the cleaning component 2 and the driving unit 3 can be set with reference to Example 2. The difference from Example 2 is that, in this embodiment, the shell 21 and the image detection unit 1 are relatively fixed, that is, the image detection unit 1 is fixedly penetrated on the mounting base 211 of the shell 21, and the protective plate 4 is rotatably set between the image detection unit 1 and the cavity wall of the accommodating cavity 213, and the driving motor 31 is connected to the protective plate 4 through the shaft connecting member 32.

[0190] In this embodiment, two protective plates 4 are provided to ensure that when one protective plate 4 is in the protective position, another protective plate 4 is in the accommodating cavity 213 waiting to be replaced, thus ensuring the switchability of the protective plates 4 and reducing the structural complexity and cost of the image detection device 10. In other embodiments, three or other numbers of protective plates 4 may be provided.

[0191] The protective plate 4 is preferably an arc-shaped plate that is compatible with the protective cover 12, and the rotation axis of the protective plate 4 passes through the center of the sphere of the protective cover 12, so that the protective plate 4 can rotate around the protective cover 12, reducing interference between structures, and improving the protective effect of the light-transmitting part 121. At the same time, it can also reduce the overall size of the image detection device.

[0192] On a plane perpendicular to the optical axis, the projection of the light-transmitting portion 121 on the plane is within the projection range of the protective plate 4 in the protective position on the plane, thereby effectively physically shielding the light-transmitting portion 121 and improving the protective performance.

[0193] Furthermore, the inner surface of each protective plate 4 is located on the same preset spherical surface, and the difference between the spherical radius of the set spherical surface and the spherical radius of the protective cover 12 is greater than 0 and less than 8 mm, and optimally greater than 0 and less than 3 mm, so as to reduce the gap between the protective plate 4 and the protective cover 121, improve the protection effect, and avoid the protective plate 4 from being squeezed or rubbed with the protective cover 12 during rotation, thereby improving the safety and reliability of the image detection unit 1.

[0194] Preferably, the inner surfaces of all protective plates 4 are located on the same preset spherical surface to simplify installation and processing and improve the versatility and replaceability of the protective plates 4. In other embodiments, the inner surfaces of several protective plates 4 can also be located on preset spherical surfaces with different spherical radii.

[0195] More preferably, the rotation axis of the protective plate 4 passes through both ends of the protective plate 4 to improve the convenience of the rotational connection between the protective plate 4 and the housing 12. In this embodiment, the rotation axes of several protective plates 4 are coaxially arranged to better control the running trajectory of the protective plates 4. Preferably, each protective plate 4 can be rotated individually to improve the controllability of a single protective plate 4. This is also beneficial to ensure that when the position of the protective plate 4 is switched, the protective plate 4 that has cut out of the protective position can be rotated out again when the protective plate 4 that has cut into the protective position is close to the protective position, ensuring that even when the position of the protective plate 4 is switched, the light-transmitting portion 121 can be as close to the protective range of the protective plate 4 as possible.

[0196] In this embodiment, protective plate 4 has a rotational shaft extending outward from each end along the rotation axis. These two rotational shafts are respectively a main rotational shaft and a secondary rotational shaft. The main rotational shaft is rotatably disposed through the side wall of mounting opening 2111 and extends outside housing 21. Its extended end is connected to drive motor 31 via shaft connector 32. The secondary rotational shaft is rotatably disposed through the opposite side wall of mounting opening 2111, and its inner end can be retracted outside housing 21. In this embodiment, the main rotational shafts of the two protective plates 4 are located on opposite sides of protective cover 12.

[0197] In this embodiment, two protective plates 4 are provided, and the driving unit 3 is connected to the main rotation axis of the protective plate 4 so that the two driving units 3 are respectively located on opposite sides of the protective cover 12 to avoid structural interference.

[0198] In this embodiment, the control rod 23 is in driving connection with the main rotating shaft so that the control rod 23 moves to selectively squeeze the cavity wall of the cleaning liquid spraying area 213a. The connection between the control rod 23 and the main rotating shaft can refer to the connection between the control rod 23 and the rotating shaft in the second embodiment, and will not be repeated here.

[0199] The following combination Figure 13 The protection switching and cleaning process of the image detection device is explained. For the convenience of description, in the initial state, the protection plate 4 that has just been transferred into the accommodating cavity 213 is called the first protection plate 41, and the protection plate 4 in the protection position is called the second protection plate 42.

[0200] like Figure 13 (a) to Figure 13As shown in (c), when the second protective plate 42 is in the protective position, the second protective plate 42 is located below the camera 111. When the first protective plate 41 is screwed into the accommodating chamber 213, it first passes through the spraying area 213a and is sprayed with cleaning liquid by the nozzle 26; the first protective plate 41 continues to rotate until it enters the wiping area 213b and contacts the wiping member 22. During the process of continued rotation of the first protective plate 41, the wiping member 22 slides relative to the first protective plate 41, thereby allowing the wiping member 22 to wipe the outer surface of the first protective plate 41; when the first protective plate 41 continues to rotate until it is out of contact with the wiping member 22, the first protective plate 41 enters the waiting area and waits for the next switch.

[0201] like Figure 13 (d) to Figure 13 As shown in (e), when the position of the protective plate 4 needs to be switched, the first protective plate 41 is moved away from the wiping area 213b ( Figure 13 When the first guard plate 41 is rotated to a set angle out of the accommodating cavity 213, the second guard plate 42 starts to rotate, that is, the second guard plate 42 rotates simultaneously with the first guard plate 41; when the first guard plate 41 is rotated to the protection position, the first guard plate 41 stops rotating, and the second guard plate 42 continues to rotate until the second guard plate 42 passes through the wiping area 213a and the wiping area 213b in sequence, and stays in the waiting area 213c.

[0202] Example 5

[0203] like Figure 14 As shown, this embodiment provides a range hood control method, which is applied to the range hood provided in the second embodiment and is a further improvement based on the control method provided in the first embodiment.

[0204] Specifically, the range hood control method provided in this embodiment includes the following steps:

[0205] Step S301, starting the range hood;

[0206] Step S302: determine whether the image detection device is in a normal state. If not, execute step S303; if so, execute step S304;

[0207] In the present invention, the image detection device is in a normal state, that is, one protective plate is in a protective position, and the other protective plates are located in the accommodating cavity.

[0208] By judging whether the image detection device is in a normal state, the image detection device can be adjusted in time before detection to avoid the problem of the light-transmitting part being contaminated by oil smoke due to a malfunction or other reason of the protective plate being rotated to the protective position.

[0209] Step S303: Adjust the image detection device to a normal state;

[0210] Step S304: Start the image detection device to detect the stove;

[0211] Step S305: determine whether it is in the cooking state, if not, execute step S306, if yes, execute step S307;

[0212] Step S306: Determine whether the standby time of the range hood is greater than the preset standby time. If not, return to step S305; if so, execute step S314.

[0213] Step S307: Identify the current cooking dish, cooking method and cooking temperature;

[0214] Step S308: retrieve the cooking temperature-oil smoke volume curve corresponding to the cooking dish and cooking method from the database according to the cooking dish and cooking method;

[0215] Step S309: Predicting the amount of oil smoke at the current cooking temperature based on the currently detected cooking temperature, i.e., the obtained cooking temperature-oil smoke amount curve;

[0216] Step S310: adjusting the wind speed of the range hood according to the predicted amount of oil smoke;

[0217] Step S311, determine whether cooking is finished, if not, return to step S307, if so, execute step S312;

[0218] Step S312: detecting the stove temperature and / or the amount of cooking fume;

[0219] Step S313: determine whether the preset shutdown condition is met, if so, execute step S314, if not, return to step S312;

[0220] Step S314: Turn off the range hood and perform a protective plate switching operation.

[0221] In this embodiment, the protective panel switching operation is executed once the range hood is turned off, which can simplify the algorithm and avoid the algorithm complexity caused by determining whether to perform the protective panel switching operation based on the reason for the range hood turning off. However, it is understood that in other embodiments, in step S306, if it is determined that the range hood has been on for longer than the preset standby time, since the cooking state has not yet occurred, the range hood can simply be turned off without performing the protective panel switching operation.

[0222] The control method for the range hood provided in this embodiment ensures that after cooking is completed or when the protective plate needs to be cleaned, the protective plate in the protective position can be rotated into the accommodating cavity, wiped clean, and then placed in the waiting area to await the next position switch. The protective plate in the accommodating cavity can be rotated out of the accommodating cavity and rotated to the protective position to continue protecting the light-transmitting portion. In other words, the control method provided in this embodiment can ensure the cleanliness of the protective plate used to protect the light-transmitting portion by switching the rotational positions of the two protective plates, and through the provision of a wiper and cleaning liquid, the replaced protective plate can be cleaned, achieving self-cleaning of the protective plate and ensuring the detection accuracy of the image detection unit.

[0223] In this embodiment, the protection switch of the protective plate is set to the end of cooking, so that each time cooking is completed, the protective plate 4 can be switched and the replaced protective plate can be cleaned, which can effectively ensure the cleanliness of the protective plate and ensure that the protective plate is clean in any working state of the image detection unit, thereby improving the detection accuracy of the image detection unit; at the same time, this setting can realize that the switching of the protective plate is always performed when the image detection unit is not working, avoiding the switching of the protective plate when the image detection unit is working; furthermore, it can also reduce the detection elements and simplify the control algorithm.

[0224] In another embodiment, the protection switching condition may also be that the protection plate currently in the protection position has been in the protection position for a set protection time or that dirt is detected on the protection plate. In other words, the state of the protection plate in the protection position is detected to determine whether a protection switching is required. This setting can reduce the number of switching times.

[0225] Furthermore, when the protective plate position is switched, the protective plate located in the accommodating cavity rotates to a set angle or to a set position before the switch, and then the protective plate located in the protective position is controlled to start rotating. This helps ensure that the light-transmitting portion is protected as much as possible by the protective plate even during the protective plate switching process.

[0226] In this embodiment, it is preferably arranged that when the protective plate located in the accommodating cavity before switching rotates to contact the protective plate in the protective position, the protective plate in the protective position starts to rotate, thereby ensuring that the two protective plates 4 can be seamlessly switched at the protective position, ensuring that the light-transmitting part can be protected by the protective plate at any time, thereby improving the protection performance of the image detection unit.

[0227] Furthermore, since the accommodating chamber is provided with a liquid spraying area, a wiping area, and a waiting area, when the protective plate is transferred from the working protection position into the accommodating chamber, it passes through the liquid spraying area, the wiping area, and the waiting area in sequence. That is, the control method provided in this embodiment further includes:

[0228] When the protective plate rotates and passes through the spraying area, the cleaning liquid is sprayed onto the protective plate through the spray holes;

[0229] When the protective plate rotates through the wiping area, the protective plate is wiped clean by the wiping member;

[0230] When the protection plate is rotated into the waiting area, the protection plate stops rotating.

[0231] Note that the above are only preferred embodiments of the present invention and the technical principles employed. Those skilled in the art will understand that the present invention is not limited to the specific embodiments described herein, and that various obvious changes, readjustments, and substitutions can be made by those skilled in the art without departing from the scope of protection of the present invention. Therefore, although the present invention has been described in detail through the above embodiments, the present invention is not limited to the above embodiments and may include many other equivalent embodiments without departing from the concept of the present invention. The scope of the present invention is determined by the scope of the appended claims.

Claims

1. A range hood control method, characterized in that: The steps include: Identify the cooking dishes and cooking methods in the cooking state; Obtaining a cooking temperature-oil smoke volume curve corresponding to the cooking dish and the cooking method; Detecting the cooking temperature in real time, and predicting the amount of oil smoke based on the detected cooking temperature and the cooking temperature-oil smoke amount curve; adjusting the suction force of the range hood based on the predicted amount of oil smoke; The range hood has an image detection device for performing image detection, the image detection device includes an image detection unit, the image detection unit includes a camera and a protective cover fixedly wrapped around the camera, the protective cover has a light-transmitting portion facing the camera, and the image detection unit is rotatable relative to the fume collection hood of the range hood; The control method further includes: In the cooking state, the light-transmitting portion is exposed to the smoke collecting hood; After cooking is finished, the image detection unit is rotated so that the light-transmitting portion is hidden inside the smoke collecting hood; The image detection device further includes a cleaning assembly, the cleaning assembly including a housing installed in the smoke collecting hood, the housing having a receiving cavity, a wiping member provided on a cavity wall of the receiving cavity, the light-transmitting portion being capable of being screwed into the receiving cavity and being wiped by the wiping member; The control method further includes: After cooking is finished, the image detection unit is rotated so that the light-transmitting portion is rotated into the accommodating cavity and is wiped clean by the wiping member when passing through the wiping member; The accommodating chamber is sequentially provided with a spraying area, a wiping area and a waiting area along the rotation direction of the image detection unit. A liquid storage chamber is provided in the housing, the liquid storage chamber stores a cleaning liquid, the spraying area is provided with a liquid spray hole communicating with the liquid storage chamber and the accommodating chamber, and the wiping member is provided in the wiping area; The control method further includes: When the light-transmitting portion rotates and passes through the spraying area, the cleaning liquid is sprayed toward the light-transmitting portion through the liquid spraying hole; When the light-transmitting portion rotates through the wiping area, the light-transmitting portion is wiped and cleaned by the wiping member; When the light-transmitting portion rotates into the waiting area, the image detection unit stops rotating.

2. The control method according to claim 1, characterized in that: The cooking dishes and cooking methods when identifying the cooking status specifically include: During the cooking process, an image detection device is used to photograph the stove; The cooking dish and the cooking method are identified according to the shooting result.

3. The control method according to claim 2, characterized in that: The control method also includes: during the cooking process, using the image detection device to take real-time photos of the stove, and continuously updating the recognition result based on the real-time shooting results. When the updated recognition result is inconsistent with the previous recognition result, the cooking temperature-oil smoke volume curve corresponding to the updated recognition result is re-acquired.

4. The control method according to claim 2, characterized in that: Identifying the cooked dish according to the shooting result specifically includes: comparing the shooting result with built-in dish images in a database of the range hood, and identifying the cooked dish according to the comparison result; The built-in dish pictures include several pictures of a single dish in different cooking methods and different cooking states, and also include several pictures of a mixed dish composed of several dishes in different cooking methods and different cooking states.

5. The control method according to claim 2, characterized in that: Identifying the cooking method according to the shooting result specifically includes: identifying a cooking stove according to the shooting result, and identifying the cooking method according to the stove.

6. The control method according to claim 5, characterized in that: Identifying the cooking method according to the photographing result further includes: identifying the cooking form of the dish in the stove according to the photographing result, and identifying the cooking method in combination with the stove and the cooking form; And / or, identifying the cooking method according to the shooting result further includes: identifying the cooking method in combination with the cooking temperature and the stove.

7. The control method according to claim 5, characterized in that: Identifying the cooking method according to the shooting result further includes: identifying the cooking action of the cook according to the shooting result, and identifying the cooking method in combination with the cooking action and the stove.

8. The control method according to any one of claims 1 to 7, characterized in that: The control method further includes: when in the cooking state, detecting the cooking temperature and the amount of oil smoke in real time, determining whether there is a difference between the detected amount of oil smoke and the predicted amount of oil smoke under the same cooking conditions, and if there is a difference, correcting the cooking temperature-oil smoke curve in real time according to the detected amount of oil smoke.

9. The control method according to claim 8, characterized in that: The obtained cooking temperature-oil smoke amount curve corresponding to the cooking dish and the cooking method is the cooking temperature-oil smoke amount curve after the latest correction.

10. The control method according to any one of claims 1 to 7, characterized in that: After cooking is finished, it is determined whether the stove temperature, the amount of oil smoke detected or the length of standby time after the cooking is finished meet the preset shutdown conditions. If so, the range hood is turned off.

11. The control method according to any one of claims 1 to 7, characterized in that: Acquiring the cooking temperature-oil fume volume curve specifically includes: acquiring the cooking temperature-oil fume volume curve stored in the range hood database, or acquiring the cooking temperature-oil fume volume curve stored online or shared by other users in a cloud data center.

12. The control method according to any one of claims 1 to 7, characterized in that: An image detection device with an infrared temperature measurement function is used to detect the cooking temperature.

13. A range hood, characterized in that: The operation of the range hood is controlled by using the range hood control method according to any one of claims 1 to 12.

Images