Image detection device, range hood, and range hood control method

Abstract

The present invention belongs to the field of electrical appliance technology, and specifically discloses an image detection device, a range hood, and a control method for the range hood. The image detection device includes: a housing, which has a accommodating cavity, and a wiping piece is provided on the cavity wall of the accommodating cavity; an image detection unit, including a camera and a protective cover wrapped around the outside of the camera, the protective cover having a light-transmitting portion, and the light-transmitting portion is exposed to the housing; a protective plate, and at least two are provided along the circumference of the protective cover, and each protective plate is rotatably connected to the housing so that any protective plate can be selectively screwed into the accommodating cavity and wiped clean by the wiping piece or rotated to the side of the light-transmitting portion away from the camera. The image detection device, range hood, and control method for the range hood provided by the present invention can improve the protection performance of the image detection unit, reduce the pollution of the light-transmitting portion by oil smoke, and realize self-cleaning of the protective plate, thereby ensuring the detection accuracy of the image detection device and enhancing the maintenance of the camera.

Description

Technical Field

[0001] The present invention belongs to the technical field of electrical appliances, and in particular relates to an image detection device, a range hood and a control method for 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] With the development of intelligent range hoods, existing range hoods are often equipped with cameras for stovetop detection. The camera can be used to detect the amount of oil smoke or the temperature of the stovetop, thereby identifying the size of the oil smoke or the temperature of the stovetop, and thus better controlling the range hood's extraction. Because the camera and its protective cover are partially exposed in the smoke collection hood, grease easily adheres to the camera cover during use. After long-term use, the camera's detection accuracy is reduced, so regular cleaning is required.

[0004] The existing method of manually cleaning the protective cover of the camera is usually to regularly scrub and clean it, which is time-consuming and labor-intensive, and easily leads to problems such as untimely and improper cleaning, thereby affecting the detection accuracy of the camera and the normal use of the range hood. Summary of the Invention

[0005] The object of the present invention is to provide an image detection device, a range hood and a control method for the range hood, so as to improve the convenience of cleaning and maintenance of the camera and ensure the accuracy of image detection.

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

[0007] An image detection device, comprising:

[0008] The housing has a receiving cavity, and a wiping member is provided on the cavity wall of the receiving cavity;

[0009] an image detection unit fixed relative to the housing and comprising a camera and a protective cover wrapped around the outside of the camera, the protective cover having at least a light-transmitting portion disposed opposite the camera, the light-transmitting portion being exposed outside the housing;

[0010] A protective plate is made of a transparent material, and at least two are arranged along the circumference of the protective cover. Each of the protective plates is rotatably connected to the outer shell so that any of the protective plates can be selectively screwed into the accommodating cavity and wiped clean by the wiping member or rotated to the side of the light-transmitting portion away from the camera.

[0011] As an optional technical solution of the image detection device, the protective cover is spherical, the protective plate is an arc-shaped plate adapted to the protective cover, and the rotation axis of the protective plate passes through the center of the sphere of the protective cover.

[0012] As an optional technical solution of the image detection device, the surface of the protective plate facing the protective cover is located on a set spherical surface, and the difference between the spherical diameter of the set spherical surface and the spherical diameter of the protective cover is greater than 0 and less than 8 mm.

[0013] As an optional technical solution of the image detection device, each of the protective plates can be rotated independently; and / or, two protective plates are provided.

[0014] As an optional technical solution for an image detection device, a liquid storage chamber and a control component are provided on the shell, the liquid storage chamber stores cleaning liquid, the liquid storage chamber has a liquid spray hole connected to the accommodating chamber, and the control component can control the liquid spray hole to spray the cleaning liquid onto the protective plate transferred into the accommodating chamber.

[0015] As an optional technical solution for an image detection device, each of the protective plates is rotatably connected to the outer shell via a rotating shaft, and the control member includes a control rod, which is transmission-connected to the rotating shaft so that the rotation of the rotating shaft can drive the control rod to selectively squeeze the wall of the accommodating cavity to spray out the cleaning liquid.

[0016] As an optional technical solution for an image detection device, the control rod is rotatably connected to the housing via a mounting shaft, a sector gear is sleeved on the rotating shaft, a driven gear is sleeved on the mounting shaft, and the sector gear can mesh with the driven gear.

[0017] As an optional technical solution of the image detection device, a drainage hole is provided at the lowest point of the cavity wall of the accommodating cavity, and the drainage hole is located below the liquid spraying hole;

[0018] And / or, a liquid adding port is provided on a side of the housing away from the image detection unit, and the liquid adding port is communicated with the liquid storage cavity;

[0019] And / or, a nozzle is provided at the liquid spraying hole, and the nozzle can be opened under the squeezing action of the cleaning liquid.

[0020] As an optional technical solution for an image detection device, a liquid spraying area, a wiping area and a waiting area are sequentially arranged in the accommodating cavity along the rotation direction of the protective plate. The liquid spraying area is provided with a plurality of liquid spraying holes, and the wiping piece is arranged in the wiping area. The protective plate can be rotated into the waiting area and lose contact with the wiping piece.

[0021] As an optional technical solution for an image detection device, the outer shell includes a mounting base plate portion and a semi-cylindrical barrel portion, the barrel portion is connected to the mounting base plate portion at both ends along the circumferential direction, and the barrel portion and the mounting base plate portion together form the accommodating cavity, the image detection unit is passed through the mounting base plate portion, the protective plate is rotatably connected to the mounting base plate portion, and the wiping member is provided on the inner surface of the barrel portion.

[0022] As an optional technical solution of the image detection device, the image detection device further includes a driving unit, wherein a driving shaft of the driving unit is drivingly connected to the protective plate;

[0023] And / or, the side of the protective cover away from the light-transmitting portion extends into the accommodating cavity.

[0024] A range hood includes a smoke hood, characterized in that it also includes the image detection device as described above, a detection hole is opened at the bottom of the smoke hood, the image detection device is installed inside the smoke hood, and the light-transmitting portion and the protective plate can be exposed to the smoke hood through the detection hole.

[0025] As an optional technical solution for the range hood, a maintenance port is provided on the top plate of the smoke collecting hood, the maintenance port is located directly above the image detection device, and a maintenance cover is provided at the maintenance port.

[0026] As an optional technical solution for a range hood, the range hood is a top-suction double-chamber range hood, the image detection device is located between two smoke inlet cavities arranged side by side on the left and right, and the image detection device is located on the front side of the smoke collection hood.

[0027] As an optional technical solution for the range hood, the optical axis of the camera is arranged vertically; and / or the detection end face of the camera is flush with the lower edge of the detection hole.

[0028] A range hood control method is applied to the range hood as described above, the control method comprising:

[0029] When it is detected that the cooktop is in a cooking state, controlling one of the protective plates to remain or rotate to a protective position where the light-transmitting portion is on a side away from the camera, and the remaining protective plates are located in the accommodating cavity;

[0030] When cooking is finished or a set protection switching condition is met, the protection plate at the protection position is controlled to be rotated into the accommodating cavity, and the protection plate in the accommodating cavity is controlled to rotate to the protection position;

[0031] When the protective plate is rotated into or out of the accommodating cavity, the wiping member wipes and cleans the protective plate.

[0032] As an optional technical solution of a control method, after the protective plate initially located in the accommodating cavity rotates to a set angle or to a set position, the protective plate located at the protective position is controlled to start rotating.

[0033] As an optional technical solution of the control method, the accommodating chamber is provided with a liquid spraying area, a wiping area, and a waiting area in sequence along the rotation direction of the image detection unit, the housing is provided with a liquid storage chamber, the liquid storage chamber stores cleaning liquid, the liquid spraying area is provided with a liquid spraying hole connecting the liquid storage chamber and the accommodating chamber, and the wiping member is provided in the wiping area;

[0034] The control method further includes:

[0035] When the protective plate rotates and passes through the liquid spraying area, the cleaning liquid is sprayed onto the protective plate through the liquid spraying holes;

[0036] When the protection plate is rotated into the waiting area, the protection plate stops rotating.

[0037] As an optional technical solution for a control method, the range hood is equipped with cooking temperature-oil smoke volume curves for different dishes and different cooking conditions. The control method further includes:

[0038] When in the cooking state, the cooking temperature is detected in real time, and the image detection unit takes a real-time photo of the stove;

[0039] Based on the shooting results, cooking dishes and cooking methods can be identified in real time;

[0040] Obtaining the corresponding cooking temperature-oil smoke volume curve according to the identified cooking dish and the cooking method;

[0041] Predicting the amount of oil smoke according to the detected cooking temperature and the cooking temperature-oil smoke amount curve;

[0042] The suction wind force of the range hood is adjusted according to the predicted amount of oil smoke.

[0043] As an optional technical solution of a control method, the control method also includes: when in the cooking state, real-time detection of the cooking temperature and the amount of oil smoke, and at the same cooking temperature, real-time correction of the cooking temperature-oil smoke curve based on the difference between the detected amount of oil smoke and the calculated amount of oil smoke.

[0044] As an optional technical solution of a control method, after cooking is completed, it is determined whether the stove temperature, the amount of oil smoke detected, or the standby time after cooking meets the preset shutdown conditions. If so, the range hood is turned off.

[0045] The beneficial effects of the present invention are:

[0046] The image detection device provided in this embodiment provides a transparent protective plate, and the protective plate can be rotated to the side of the light-transmitting part away from the camera, so that the protective plate can protect the light-transmitting part and reduce the pollution of the light-transmitting part by external dust, oil stains, etc., thereby reducing the cleaning frequency of the image detection unit; by providing an outer shell and a accommodating cavity, when one of the protective plates is in the protective position for protecting the light-transmitting part, the remaining protective plates can be rotated into the accommodating cavity to reduce the pollution of the remaining protective plates by dust, oil stains, etc.; by providing a wiping piece, the protective plate screwed into the accommodating cavity can be wiped and cleaned by the wiping piece, so that when the protective plate in the accommodating cavity is rotated to the protective position, its clarity can be guaranteed, and the protective plate rotated from the protective position into the accommodating cavity can be cleaned, that is, it can be ensured that the protective plates in the protective position are all protective plates cleaned by the wiping piece, effectively ensuring the detection accuracy of the image detection unit.

[0047] The range hood provided by the embodiment of the present invention can ensure the accuracy of image detection by adopting the above-mentioned image detection device to perform image detection, thereby improving the control accuracy of the range hood and reducing the difficulty of cleaning and maintaining the range hood.

[0048] The control method for a range hood provided in an embodiment of the present invention can rotate the image detection device into the accommodating cavity when not in use, so that the light-transmitting portion can be hidden inside the range hood when not in use, thereby reducing grease contamination of the light-transmitting portion, thereby ensuring the accuracy of image detection and improving the control accuracy of the range hood. BRIEF DESCRIPTION OF THE DRAWINGS

[0049] Figure 1 is a structural diagram of an image detection device provided in Example 1 of the present invention;

[0050] Figure 2 is a cross-sectional view of an image detection device provided in Embodiment 1 of the present invention;

[0051] Figure 3 This is a schematic structural diagram of a cleaning assembly provided in Example 1 of the present invention;

[0052] Figure 4 is a structural schematic diagram of the mounting bracket provided in the first embodiment of the present invention;

[0053] Figure 5 1 is a schematic diagram of the cleaning process of the image detection device provided in the first embodiment of the present invention;

[0054] Figure 6 is a cross-sectional view of a range hood provided in a second embodiment of the present invention;

[0055] Figure 7 yes Figure 6 A partial enlarged view of point I in the middle;

[0056] Figure 8 is a bottom view of the range hood provided in the second embodiment of the present invention;

[0057] Figure 9 This is a flow chart of a range hood control method provided in the fourth embodiment of the present invention.

[0058] The following are marked in the figure:

[0059] 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;

[0060] 1. Image detection unit; 11. Camera module; 111. Camera; 12. Protective cover; 121. Light-transmitting portion;

[0061] 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;

[0062] 3. Drive unit; 31. Drive motor; 32. Shaft connector; 321. First connector; 322. Second connector;

[0063] 4. Protective plate; 41. First protective plate; 42. Second protective plate;

[0064] 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

[0065] 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.

[0066] 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.

[0067] 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.

[0068] 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.

[0069] Example 1

[0070] like Figure 1 As shown, this embodiment provides an image detection device 10, which has image detection function and self-cleaning function. It can realize image detection of the structure to be tested, and at the same time improve the oil fume protection performance of the camera and the self-cleaning performance of the image detection device, thereby ensuring the detection accuracy of the image detection device 10 and reducing the difficulty of cleaning the image detection device 10.

[0071] This embodiment takes the application of the image detection device 10 in a range hood as an example to specifically introduce the specific structure and usage of the image detection device 10. However, it can be understood that the image detection device 10 provided in this embodiment can also be applied to other scenarios that require intermittent image detection, and changes in application scenarios will not cause changes to the basic structure of the image detection device 10.

[0072] Specifically, if Figure 1-Figure 5As shown, the image detection device 10 provided in this embodiment includes an image detection unit 1, a cleaning component 2 and a protective plate 4. The cleaning component 2 includes a shell 21 and a wiper 22, the shell 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 shell 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, and 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 shell 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 shell 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.

[0073] 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 .

[0074] 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.

[0075] 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.

[0076] 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.

[0077] Preferably, on any plane passing through the optical axis, the center angle of the cross-sectional arc formed by the light-transmitting portion 121 on the plane is a preset angle. Further, the preset angle is 45° to 180°, and the optimal angle is 60°.

[0078] 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.

[0079] 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.

[0080] Preferably, the side of the protective cover 12 away from the light-transmitting portion 121 extends into the accommodating cavity 213 , so as to provide partial dust and oil protection for the protective cover 12 while reducing the overall size of the image detection device 10 .

[0081] 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.

[0082] 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.

[0083] 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.

[0084] 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.

[0085] 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. When the position of the protective plate 4 is switched, it is also beneficial to ensure that 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. 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.

[0086] 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 cross-sectional profile of the accommodating cavity 213 is semicircular, so that half of the protective cover 12 can be substantially accommodated in the accommodating cavity 213. This can also reduce the size of the image detection device 10 while ensuring that the single protective plate 4 can be fully accommodated in the accommodating cavity 213.

[0087] Furthermore, the outer shell 21 is a semi-cylindrical structure, which includes 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.

[0088] The mounting base 211 has a mounting opening 2111 defined therein. The image sensing unit 1 is inserted into the mounting opening 2111 and fixed relative to the mounting base 211. The protective plate 4 is mounted on the inner side of the mounting opening 2111 and is rotatably connected to the mounting base 211. Preferably, the mounting opening 2111 is a circular hole, the diameter of which is equal to or slightly larger than the diameter of the circle encompassing the outer surface of the protective plate 4. This arrangement reduces the gap between the protective cover 12 and the wall of the mounting opening 2111 after the image sensing unit 1 is installed, thereby reducing the probability of external grease entering the accommodating cavity 213.

[0089] In this embodiment, protective plate 4 has a rotational axis extending outward from each end along the rotation axis. The two rotational axes are respectively a main rotational axis and a secondary rotational axis. The main rotational axis is rotatably disposed through the side wall of mounting opening 2111 and extends outside housing 21. The secondary rotational axis 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 axes of the two protective plates 4 are located on opposite sides of protective cover 12.

[0090] To enhance the cleaning automation of the image detection device 10, the image detection device 10 further includes a drive unit 3, which is drivably connected to the protective plates 4 to drive the rotation of the protective plates 4. In this embodiment, the drive units 3 are provided in a one-to-one correspondence with the protective plates 4 to achieve independent movement of a single protective plate 4. In other embodiments, multiple protective plates 4 may share a single drive unit 3, allowing the multiple protective plates 4 to rotate synchronously via the drive unit 3, or the drive unit 3 may achieve asynchronous motion control of the multiple protective plates 4 via a transmission structure.

[0091] 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.

[0092] In this embodiment, the drive unit 3 includes a drive motor 31, a drive shaft of the drive motor 31 being coaxially arranged with the rotating shaft, and the drive shaft being 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.

[0093] 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.

[0094] 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.

[0095] 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.

[0096] 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.

[0097] 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.

[0098] When the image detection device 10 is used in a range hood, it is mounted on the range hood 20. Since the bottom of the hood 20 is typically tilted, in this embodiment, the mounting plate 54 is preferably tilted relative to the support plate 53, with both mounting plates 54 tilted in the same direction. This arrangement of the mounting plates 54 allows for connection between the mounting plates 54 and the bottom of the hood 20 while also ensuring a horizontal arrangement of the drive shaft of the drive motor 31. Specifically, in this embodiment, the top mounting plate 51 and the support plate 53 are arranged horizontally and spaced apart, while the side mounting plates 52 are arranged vertically.

[0099] To improve the cleanliness of the light-transmitting portion 121 by the cleaning assembly 2, in this embodiment, the housing 21 has a liquid reservoir 214. The liquid reservoir 214 stores cleaning liquid. The liquid reservoir 214 has a spray hole communicating with the receiving chamber 213. A control unit controls the spray hole to spray the cleaning liquid toward the protective plate 4, which is positioned within the receiving chamber 213. This arrangement allows the cleaning liquid to be sprayed onto the surface of the protective plate 4 through the spray hole. As the surface of the protective plate 4 is sprayed with the cleaning liquid, the cleaning liquid is scrubbed clean by the combined action of the cleaning liquid and the wiping member 22 as the surface passes through.

[0100] 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.

[0101] Furthermore, nozzles 26 are provided at the spray holes, which can be opened by the squeezing action of the fluid. The provision of nozzles 26 enables the cleaning liquid at the spraying location to be dispersed in a mist-like manner, increasing the spray coverage of the protective plate 4 and improving the spraying effect of the cleaning liquid, thereby enhancing the cleaning effect of the protective plate 4. Nozzles 26 are provided in a one-to-one correspondence with the spray holes.

[0102] In this embodiment, the control member includes a control lever 23. After the protective plate 4 is rotated by a predetermined angle from the protective position, the control lever 23 compresses the wall of the liquid spraying area 213a, causing the cleaning liquid to be ejected through the liquid spraying hole. This method of squeezing the liquid spraying area 213a eliminates the need for electronic control components 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.

[0103] In this embodiment, the protective position refers to the position of the protective plate 4 when the light-transmitting portion 121 is located away from the camera 111, that is, the position in which the light-transmitting portion 121 is protected. In this embodiment, the rotation angle is preferably set to 60 to 90 degrees. In other embodiments, the rotation angle can be specifically selected based on the specific shape of the housing 21 and the central angle of the protective plate 4.

[0104] 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. 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.

[0105] Specifically, a fan-shaped gear 24 is fixed on the main rotating shaft, and the control rod 23 is rotatably connected to the outer shell 21 through the mounting shaft. A driven gear 25 is fixed on the mounting shaft. When the protective plate 3 is in the protective position, the fan-shaped gear 24 and the driven gear 25 are out of contact. When the main rotating shaft rotates to the set rotation angle, the fan-shaped 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.

[0106] The above-described connection method between the main rotating shaft and the control rod 23 is simple in structure, easy to control, and requires little space. In other embodiments, the main rotating shaft can also be connected to the control rod 23 via a connecting rod or a crank slider structure, as long as the main rotating shaft can rotate to drive the control rod 23 so that the control rod 23 selectively squeezes the cavity wall of the liquid spraying area 213a.

[0107] 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.

[0108] In order to restore the control rod 23 to its initial position where it does not press against the wall of the liquid 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.

[0109] Preferably, when the control rod 23 is not pressing against the cavity wall of the liquid spraying area a, the control rod 23 is positioned directly opposite the wiping area 213b, thereby reducing the rotation angle required for the control rod 23 to rotate to the liquid spraying area 213a. In other embodiments, during operation, 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 rotation shaft, an intermediate gear should be added between the driven gear 25 and the sector gear 24 to facilitate direction change.

[0110] One end of the control rod 23 is connected to the mounting shaft, and the other end of the control rod 23 is provided with a limiting groove, which has an L-shaped groove wall, and one side of the groove wall abuts against the inner surface of the cylinder 212, and the other side of the groove wall abuts against the end face of the outer shell 21, so as to better realize the rotation guidance of the control rod 23 and avoid the control rod 23 from being deflected in the axial direction of the mounting shaft during the rotation process.

[0111] like Figure 3 As shown, in order to avoid 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.

[0112] 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.

[0113] The wiper 22 is preferably constructed of a sponge, foam, or cotton strip to improve wiping performance on the protective plate 4. The inner surface of the wiper 22 is preferably a spherical arc surface that conforms to the protective plate 4 to enhance cleaning performance. Furthermore, the thickness of the wiper 22 is slightly greater than the gap between the protective cover 12 and the main cavity wall to ensure a certain amount of pressure between the wiper 22 and the outer surface of the protective plate 4, ensuring effective wiping.

[0114] Preferably, the accommodating chamber 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 protective plate 4 rotates to the waiting area 213c, the protective plate 4 is disengaged from the wiping member 22, thereby preventing the wiping member 22 from squeezing the protective plate 4 for a long time. At the same time, the relative rotation between the two can also realize the comprehensive cleaning of the protective plate 4 by the wiping member 22, thereby preventing dirt from sticking to the protective plate 4 and ensuring the cleaning effect of the protective plate 4.

[0115] Preferably, in this embodiment, the central angles corresponding to the waiting area 213c, the wiping area 213b and the spraying area 213a are all 60°. 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.

[0116] The following combination Figure 5 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.

[0117] like Figure 5 (a) to Figure 5 As 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 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.

[0118] like Figure 5 (d) to Figure 5 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 5 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.

[0119] Example 2

[0120] like Figure 6-Figure 8 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 smoke exhaust pipe 30, and the image detection device 10 in Example 1. The smoke hood 20 is used to fold the range hood, and the exhaust device 40 is used to extract the smoke from the smoke hood 20 to the outside.

[0121] The image detection device 10 is installed inside the fume hood 20. A control panel 50 is located on the front side of the fume hood 20. The image detection device 10 is located in the non-oil passage area of ​​the fume hood 20, near the control panel 50. The bottom surface of the fume hood 20 has an inspection hole. The protective cover 12 partially extends out of the inspection hole, allowing the light-transmitting portion 121 and the protective plate 4 to extend out of the inspection hole and be exposed outside the fume hood 20. This allows the camera 111 to image the stovetop. Both the housing 21 and the mounting bracket 5 are detachably connected to the inner surface of the fume hood 20.

[0122] 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.

[0123] In this embodiment, the cleaning waste liquid flowing out of the drainage hole 216 can be used to perform secondary cleaning on the inner surface of the smoke collecting hood 20, thereby improving the utilization efficiency of the cleaning liquid.

[0124] 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.

[0125] In this embodiment, the range hood is preferably a top-suction dual-chamber range hood, i.e., the fume hood 20 is divided into two left and right fume inlet chambers 203 by a filter screen 202. The image detection device 10 is preferably located between the two fume inlet chambers 203, thereby minimizing contamination of the image detection device 10 by cooking fumes. This arrangement further facilitates the downward sliding of cleaning waste liquid discharged from the drain hole 216 along the bottom surface of the fume hood 20 into the oil cup 205, thereby cleaning the bottom of the fume hood 20 and the oil cup 205 while also better collecting the waste liquid.

[0126] 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.

[0127] 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.

[0128] Example 3

[0129] like Figure 9 As shown, this embodiment provides a range hood control method, which is applied to the range hood provided in the second embodiment to improve the protection of the camera module 11 and realize the self-cleaning of the camera module 11.

[0130] The range hood control method provided in this embodiment includes:

[0131] When it is detected that the cooktop is in a cooking state, one of the protective plates 4 is controlled to remain or rotate to a protective position on the side of the light-transmitting portion 121 away from the camera 111, and the remaining protective plates 4 are located in the accommodating cavity 213;

[0132] When the set protection switching condition is met, the protection plate 4 at the protection position is controlled to be rotated into the accommodating cavity 213, and a protection plate 4 located in the accommodating cavity 213 is controlled to rotate to the protection position;

[0133] When the protective plate 4 is rotated into or out of the accommodating cavity 213 , the wiping member 22 wipes and cleans the protective plate 4 .

[0134] The range hood control method provided in this embodiment ensures that after cooking is completed or when the protective plate 4 needs to be cleaned, the protective plate 4 in the protective position can be rotated into the accommodating cavity 213, wiped clean, and then placed in the waiting area to await the next position switch. The protective plate in the accommodating cavity 213 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.

[0135] In this embodiment, the protection switching conditions include: cooking is completed, the protection plate currently in the protection position has been in the protection position for longer than the set protection time, or dirt is detected on the protection plate.

[0136] Preferably, the protection switching condition is set to the end of cooking, so that the protection plate 4 can be switched every time cooking is completed, and the replaced protection plate can be cleaned, which can effectively ensure the cleanliness of the protection plate and ensure that the protection 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 ensure that the switching of the protection plate is always performed when the image detection unit is not working, avoiding the switching of the protection plate when the image detection unit is working; furthermore, it can also reduce the detection elements and simplify the control algorithm.

[0137] 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.

[0138] 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.

[0139] 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:

[0140] When the protective plate rotates and passes through the liquid spraying area, the cleaning liquid is sprayed onto the protective plate through the liquid spraying holes;

[0141] When the protective plate rotates through the wiping area, the light-transmitting portion is wiped clean by the wiping member;

[0142] When the protection plate is rotated into the waiting area, the protection plate stops rotating.

[0143] Example 4

[0144] This embodiment provides a range hood control method, which is a further improvement on the range hood control method provided in the third embodiment.

[0145] The range hood control method provided in this embodiment includes:

[0146] Step S1, starting the range hood;

[0147] Step S2: determine whether the image detection device is in a normal state. If not, execute step S3; if so, execute step S4;

[0148] 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.

[0149] 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.

[0150] Step S3, adjusting the image detection device to a normal state;

[0151] Step S4: start the image detection device to detect the stove;

[0152] Step S5, determine whether it is in the cooking state, if not, execute step S6, if so, execute step S7;

[0153] Step S6, determining whether the standby time of the range hood is greater than the preset standby time, if not, returning to step S5, if yes, executing step S14;

[0154] By determining whether the standby time of the range hood is greater than the preset standby time, the problem of the range hood being on standby for a long time due to the user forgetting to turn off the range hood can be avoided, thereby saving energy consumption.

[0155] Step S7: Identify the current cooking dish, cooking method and cooking temperature;

[0156] 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.

[0157] In this step, the "cooked dish" refers to the type of dish being cooked in the cooker. The specific identification method is to identify the dish being cooked through image comparison. That is, 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 technology and will not be described in detail in this embodiment.

[0158] It is worth noting that when the captured image is an image of a single dish, the identified dish is a single dish. For example, in the early stage of cooking, when only eggs are cooked in the stove, the dish is only identified as eggs. When the captured image includes several dishes, not only each dish contained therein can be identified, but also the corresponding dish can be identified. At this time, the dish refers to the entire dish being cooked. For example, in the later stage of cooking, if there are eggs and tomatoes in the stove, the dish can be identified as scrambled eggs with tomatoes. If there are eggs and leeks in the stove, the dish can be identified as scrambled eggs with leeks.

[0159] 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.

[0160] Cooking methods include steaming, stir-frying, stewing, boiling, and other commonly used cooking methods. The cooking method can be initially identified based on the type of stove, for example, a wok is typically used for stir-frying, while a steamer is commonly used for steaming. More preferably, the cooking method can be more accurately identified by identifying the stove type and the state of the dish in the stove. Furthermore, the cooking method can be more precisely identified based on the identified stove type, dish state, and cooking temperature. For example, if the cooking method is stewing, the cooking temperature can be combined to specifically identify whether the cooking method is slow stewing, medium stewing, or high stewing.

[0161] Step S8: 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;

[0162] Cooking temperature-oil smoke volume curves for different dishes and different cooking methods are pre-stored in the database of the range hood controller.

[0163] 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.

[0164] Step S9: 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;

[0165] 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.

[0166] Step S10: adjusting the wind speed of the range hood according to the predicted amount of oil smoke;

[0167] 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.

[0168] 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.

[0169] 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.

[0170] Step S11, determine whether cooking is finished, if not, return to step S7, if so, execute step S12;

[0171] Step S12: detecting the stove temperature and / or the amount of cooking fume;

[0172] Step S13: determine whether the preset shutdown condition is met, if so, execute step S14, if not, return to step S12;

[0173] In this embodiment, the preset shutdown conditions are: whether the stove temperature is lower than a preset temperature, whether the amount of oil smoke is lower than a preset amount of oil smoke, or whether the standby time is greater than a preset time.

[0174] This setting can achieve extended shutdown of the range hood, ensure sufficient extraction of oil smoke, avoid oil smoke overflow, improve the suction effect of the range hood, and enhance user experience.

[0175] Step S14: Turn off the range hood and perform a protective plate switching operation.

[0176] 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.

[0177] The protective plate switching operation is performed with reference to the protective plate switching operation in Example 2, and will not be further described in this embodiment. In this embodiment, the protective plate switching operation is performed once the range hood is turned off, which can simplify the algorithm and avoid the algorithm complexity caused by determining whether the protective plate switching operation is necessary by determining the reason for the range hood turning off. However, it is understood that in other embodiments, in step S6, 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 be simply turned off without switching the protective plate.

[0178] 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.

[0179] This setting can continuously revise 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.

[0180] 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. An image detection device, characterized in that: include: A housing (21) having a receiving cavity (213), wherein a wiping member (22) is provided on a cavity wall of the receiving cavity (213); An image detection unit (1) is fixed relative to the housing (21) and comprises a camera (111) and a protective cover (12) wrapped around the outside of the camera (111), wherein the protective cover (12) at least comprises a light-transmitting portion (121) arranged opposite to the camera (111), and the light-transmitting portion (121) is exposed outside the housing (21); a protective plate (4) made of a transparent material, and at least two of which are provided along the circumference of the protective cover (12), each of the protective plates (4) being rotatably connected to the housing (21), so that any of the protective plates (4) can be selectively screwed into the accommodating cavity (213) and wiped clean by the wiping member (22), or rotated to a side of the light-transmitting portion (121) away from the camera (111); The housing (21) is provided with a liquid storage cavity (214) and a control component. Cleaning liquid is stored in the liquid storage cavity (214). The liquid storage cavity (214) has a liquid spray hole connected to the accommodating cavity (213). The control component can control the liquid spray hole to spray the cleaning liquid toward the protective plate (4) rotated into the accommodating cavity (213). Each of the protective plates (4) is rotatably connected to the housing (21) via a rotating shaft, and the control member comprises a control rod (23) which is in transmission connection with the rotating shaft, so that the rotation of the rotating shaft can drive the control rod (23) to selectively squeeze the cavity wall of the accommodating cavity (213) to eject the cleaning liquid.

2. The image detection device according to claim 1, wherein The protective cover (12) is spherical, the protective plate (4) is an arc-shaped plate adapted to 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).

3. The image detection device according to claim 2, wherein: The surface of the protective plate (4) facing the protective cover (12) is located on a set 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.

4. The image detection device according to claim 1, wherein Each of the protective plates (4) is capable of rotating independently; and / or, two protective plates (4) are provided.

5. The image detection device according to claim 1, wherein The control rod (23) is rotatably connected to the housing (21) via a mounting shaft. A sector gear (24) is sleeved on the rotating shaft. A driven gear (25) is sleeved on the mounting shaft. The sector gear (24) can mesh with the driven gear (25).

6. The image detection device according to claim 1, wherein: A drainage hole (216) is provided at the lowest point of the cavity wall of the accommodating cavity (213), and the drainage hole (216) is located below the liquid spraying hole; And / or, a liquid adding port (215) is provided on a side of the housing (21) away from the image detection unit (1), and the liquid adding port (215) is communicated with the liquid storage chamber (214); And / or, a nozzle (26) is provided at the liquid spray hole, and the nozzle (26) can be opened under the squeezing action of the cleaning liquid.

7. The image detection device according to claim 1, wherein: A liquid spraying area (213a), a wiping area (213b) and a waiting area (213c) are sequentially arranged in the accommodating cavity along the rotation direction of the protective plate (4); the liquid spraying area (213a) is provided with a plurality of liquid spraying holes; the wiping member (22) is arranged in the wiping area (213b); and the protective plate (4) can be rotated into the waiting area (213c) and be out of contact with the wiping member (22).

8. The image detection device according to any one of claims 1 to 4, characterized in that: The housing (21) includes a mounting base plate portion (211) and a semi-cylindrical barrel portion (212), the barrel portion (212) is connected to the mounting base plate portion (211) at both ends along the circumferential direction, and the barrel portion (212) and the mounting base plate portion (211) together form the accommodating cavity (213), the image detection unit (1) is inserted into the mounting base plate portion (211), the protective plate (4) is rotatably connected to the mounting base plate portion (211), and the wiping member (22) is provided on the inner surface of the barrel portion (212).

9. The image detection device according to any one of claims 1 to 4, characterized in that: The image detection device further comprises a driving unit (3), wherein a driving shaft of the driving unit (3) is drivingly connected to the protective plate (4); And / or, the side of the protective cover (12) away from the light-transmitting portion (121) extends into the accommodating cavity (213).

10. A range hood, comprising a fume collecting hood (20), characterized in that: It also includes the image detection device according to any one of claims 1 to 9, wherein a detection hole is provided at the bottom of the smoke hood (20), the image detection device is installed inside the smoke hood (20), and the light-transmitting portion (121) and the protective plate (4) can be exposed to the outside of the smoke hood (20) through the detection hole.

11. The range hood according to claim 10, characterized in that: A maintenance port is provided on the top plate of the smoke collecting hood (20), the maintenance port is located directly above the image detection device, and a maintenance cover (204) is provided at the maintenance port.

12. The range hood according to claim 11, characterized in that: The range hood is a top-suction double-chamber range hood, the image detection device is located between two smoke inlet cavities (203) arranged side by side on the left and right, and the image detection device is located on the front side of the smoke collecting hood (20).

13. The range hood according to claim 12, characterized in that: The optical axis of the camera (111) is arranged vertically; and / or the end surface of the detection end of the camera (111) is flush with the lower edge of the detection hole.

14. A range hood control method, characterized in that: Applied to the range hood according to any one of claims 10 to 13, the control method comprises: When it is detected that the stove is in a cooking state, one of the protective plates (4) is controlled to remain or rotate to a protective position on a side of the light-transmitting portion (121) away from the camera (111), and the remaining protective plates (4) are located in the accommodating cavity (213); When a set protection switching condition is met, the protection plate (4) located at the protection position is controlled to be rotated into the accommodating cavity (213), and the protection plate (4) located in the accommodating cavity (213) is controlled to rotate to the protection position; During the process of the protective plate (4) being rotated into or out of the accommodating cavity (213), the wiping member (22) wipes and cleans the protective plate (4).

15. The control method according to claim 14, characterized in that: After the protective plate (4) initially located in the accommodating cavity (213) rotates to a set angle or to a set position, the protective plate (4) located at the protective position is controlled to start rotating.

16. The control method according to claim 14, characterized in that: The accommodating chamber (213) is provided with a liquid spraying area (213a), a wiping area (213b) and a waiting area (213c) in sequence along the rotation direction of the image detection unit (1); a liquid storage chamber (214) is provided in the housing (21); the liquid storage chamber (214) stores cleaning liquid; the liquid spraying area (213a) is provided with a liquid spraying hole communicating with the liquid storage chamber (214) and the accommodating chamber (213); and the wiping member (22) is provided in the wiping area (213b); The control method further includes: When the protective plate (4) rotates and passes through the liquid spraying area (213a), the cleaning liquid is sprayed onto the protective plate (4) through the liquid spraying holes; When the protection plate (4) is rotated into the waiting area (213c), the protection plate (4) stops rotating.

17. The control method according to any one of claims 14 to 16, characterized in that: The range hood is equipped with cooking temperature-oil smoke volume curves for different dishes and different cooking conditions, and the control method further includes: When in a cooking state, the cooking temperature is detected in real time, and the image detection unit (1) takes a real-time photo of the stove; Based on the shooting results, cooking dishes and cooking methods can be identified in real time; Obtaining the corresponding cooking temperature-oil smoke volume curve according to the identified cooking dish and the cooking method; Predicting the amount of oil smoke according to the detected cooking temperature and the cooking temperature-oil smoke amount curve; The suction wind force of the range hood is adjusted according to the predicted amount of oil smoke.

18. The control method according to claim 17, 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, and at the same cooking temperature, correcting the cooking temperature-oil smoke curve in real time based on the difference between the detected amount of oil smoke and the calculated amount of oil smoke.

19. The control method according to claim 17, characterized in that: After cooking is finished, it is determined whether the stove temperature, the amount of oil smoke detected, or the standby time after cooking is finished meets the preset shutdown conditions. If so, the range hood is turned off.

Images