Cooking device control method

Abstract

The invention relates to a cooking device control method which comprises the following steps: step 1, a camera shoots an image above a kitchen range table top, and the distance between the top of a pot and the table top where the kitchen range is located is calculated; 2, judging whether cookware placed on the kitchen range collides with the bottom of the air inlet assembly or not, if yes, controlling the air inlet assembly to ascend, controlling a fan of the extractor hood to be adjusted to a corresponding working gear according to the distance between the bottom of the ascended air inlet assembly and the top of the cookware placed on the kitchen range, and ending; if not, turning to the step 3; 3, whether the air inlet assembly is lowered to the lowest position or not is judged, if yes, the lifting module is controlled to stop acting, a draught fan of the extractor hood is switched or kept at the weak gear, and the process is finished; if not, the lifting module is controlled to continue to act, so that the air inlet assembly continues to descend, and the step 1 is executed. According to the method, the situation that the air inlet assembly ascends and descends to touch the cookware can be effectively avoided, and the use experience of a user is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of cooking devices, and in particular to a cooking device control method. Background Art

[0002] Range hoods are essential appliances for people to absorb oil fumes during daily cooking. Traditional range hoods generally provide users with a fixed air inlet height, but the oil fume extraction effect is difficult to match with pots and pans.

[0003] To solve the above problems, a Chinese utility model patent with patent number ZL202322037858.2 (authorization announcement number CN220506839U) discloses a lift-type range hood, which can adjust the height of the air inlet during operation to adapt to cookware of different heights and sizes. When close to the cookware, a lower gear is used to absorb oil fumes, which can reduce noise and achieve better oil fume absorption effect. When at a higher position away from the cookware, a large gear is used to increase the air volume to ensure the oil fume absorption effect, slightly sacrificing noise.

[0004] However, the above-mentioned lifting range hood is easy to hit the pot or pot cover during the lifting process. In the prior art, microwave distance sensors are usually used for pot detection. However, microwave distance sensors are mainly used for single-point distance detection. For concave pots, because the middle concave may become convex after the pot cover is covered, if the fixed distance sensor is placed in the middle, it cannot detect the edge when the pot cover is not covered (the edge is higher at this time). When the distance sensor is placed on the edge to detect the edge of the pot, because the diameters of pots in different users' homes are different, and sometimes users cover the pot cover (at this time, the middle pot cover handle is higher), it is difficult to take into account the detection of different positions and cannot adapt to the detection of pots of different diameters. It is inevitable that the lifting air inlet will hit the pot, causing the pot to be crushed or an accident. For this reason, further improvements to the prior art are needed. Summary of the invention

[0005] The technical problem to be solved by the present invention is to provide a cooking device control method that can effectively prevent the air inlet assembly from touching the pot due to the lifting of the air inlet assembly in view of the above-mentioned prior art.

[0006] The technical solution adopted by the present invention to solve the above technical problems is: a cooking device control method, the cooking device includes a range hood and a stove located below the range hood, the range hood includes a smoke hood, an air inlet assembly constrained on the smoke hood in a manner that it can be lifted up and down relative to the smoke hood, and a lifting module for driving the air inlet assembly to lift up and down, characterized in that the cooking device also includes:

[0007] A camera is arranged on the front side of the smoke collecting hood;

[0008] A controller connected with the camera and the lifting module;

[0009] The cooking device control method comprises the following steps:

[0010] Step 1: The camera captures an image above the stove countertop, and calculates the distance h between the top of the pot and the countertop where the stove is located based on the image and camera installation information;

[0011] The specific steps are:

[0012] Set the camera location as the origin O, the horizontal direction as the X-axis, and the vertical direction as the Y-axis to establish a coordinate system; record the highest point of the pot as point P 2 , point P 2 The point projected onto the table where the stove is located is denoted as point P 1 , the point where point O is projected onto the table where the stove is located is recorded as point N;

[0013]

[0014] Among them, P 1 D is line segment P 1 The length of D, point D is the extended line segment OP 2 The point that falls on the countertop where the stove is located; ND is the length of line segment ND; ON is the length of line segment ON;

[0015] Step 2: Calculate the distance △h between the bottom of the air inlet assembly and the top of the pot placed on the stove according to the distance h between the top of the pot and the table where the stove is located, and judge whether the pot placed on the stove will collide with the bottom of the air inlet assembly. If so, control the air inlet assembly to rise, and control the fan of the range hood to adjust to the corresponding working gear according to the distance between the bottom of the air inlet assembly after the rise and the top of the pot placed on the stove, and end; if not, proceed to step 3;

[0016] Step 3, determine whether the air inlet assembly is lowered to the lowest position. If so, control the lifting module to stop moving, switch the range hood fan to or maintain a low gear, and end; if not, control the lifting module to continue moving so that the air inlet assembly continues to descend, and proceed to step 1.

[0017] In order to further improve the accuracy of the cooking device control, the step 1 further includes calculating the horizontal distance d between the pot and the camera;

[0018] The camera shoots the pot and forms a point M on the table where the cooker is located. Point O and point M form the center line OM of the camera optical axis.

[0019] The horizontal distance d between the pot and the camera is obtained according to the following calculation formula;

[0020]

[0021] Where H is the vertical distance between the camera and the countertop where the stove is located, that is, the length of the line segment ON; α is the angle between the horizontal direction of the camera installation and the vertical direction of the installation; β 2 is the line segment OP 1 The angle formed between the camera optical axis centerline OM.

[0022] Preferably, step 2 further comprises calculating the distance Δd between the rear side of the cookware and the front side of the air inlet assembly based on the horizontal distance d between the cookware and the camera.

[0023] Preferably, the line segment P is extended 1 O and the imaging point falling on the photosensitive plate of the camera is recorded as point V 1 , extend line segment P 2 O and the imaging point on the camera's photosensitive plate is recorded as point V 2 , the center point of the camera's photosensitive plate is U, and point U is the point on the camera's photosensitive plate where the extended line segment MO falls;

[0024]

[0025] Among them, V 1 U is the line segment V 1 U is the length of the camera, and f is the focal length of the camera.

[0026] Preferably, the length calculation formula of line segment ND is:

[0027]

[0028] Among them, β 1 is the angle between the line segment OD and the center line OM of the camera optical axis, V 2 U is the line segment V 2 The length of U.

[0029] Preferably, the specific process of determining whether the pot placed on the cooker will collide with the bottom of the air inlet assembly in step 2 is:

[0030] If △d>0, whether the pot placed on the cooker will not collide with the bottom of the air inlet assembly;

[0031] If △d<0 and △h>0, whether the pot placed on the cooker will not collide with the bottom of the air inlet assembly;

[0032] If △d<0 and △h<0, whether the pot placed on the cooker will collide with the bottom of the air inlet assembly.

[0033] Preferably, the camera is tilted downward at a certain angle to the horizontal direction.

[0034] Preferably, the camera is arranged adjacent to the bottom of the front side of the smoke collecting hood.

[0035] Compared with the prior art, the advantages of the present invention are: by setting a camera and a controller, the controller is connected to the camera and the lifting module, and the distance between the top of the pot and the table where the stove is located is calculated according to the image above the stove taken by the camera, and the controller can then control the lifting module to perform corresponding actions. Therefore, the cooking device can realize intelligent detection of whether the air inlet assembly in the space between the bottom of the range hood and the stove table will collide with the pot during the lifting movement, and adjust the height of the air inlet assembly in time; and it can adapt to various different pots through camera detection. Compared with the distance sensor, it is suitable for a wider range, and can effectively avoid the situation where the air inlet assembly touches the pot when it is lifted, thereby improving the user experience. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] Figure 1 is a schematic structural diagram of a cooking device in an embodiment of the present invention;

[0037] Figure 2 for Figure 1 Side view of

[0038] Figure 3 for Figure 2 A side view of the middle air inlet assembly being lowered so that the air inlet portion is exposed outside the smoke hood;

[0039] Figure 4 for Figure 3 A side view of the middle air inlet assembly as it continues to descend;

[0040] Figure 5 A schematic diagram of establishing a coordinate system in an embodiment of the present invention;

[0041] Figure 6 4 is a flow chart of a cooking device control method according to an embodiment of the present invention. DETAILED DESCRIPTION

[0042] The present invention is further described in detail below with reference to the accompanying drawings.

[0043] like Figure 1As shown, the cooking device in this embodiment includes a range hood 1 and a stove 2 located below the range hood 1. The range hood 1 includes a smoke hood 11, an air inlet assembly 12 constrained on the smoke hood 11 in a manner that it can be lifted up and down relative to the smoke hood 11, and a lifting module that drives the air inlet assembly 12 to be lifted. A fan frame 13 is also provided above the smoke hood 11. A fan is provided in the fan frame 13. The structure of the fan is prior art and will not be described in detail here. The air inlet assembly 12 and the lifting module in this embodiment can refer to the contents disclosed in the Chinese utility model patent "A lifting range hood" with patent number ZL202322037858.2 (authorization announcement number CN220506839U) previously applied by the applicant. The specific state of the air inlet assembly 12 is as follows: Figures 2 to 4 shown.

[0044] The cooking device in this embodiment further includes a camera 3 and a controller. The camera 3 is disposed on the front side of the smoke collecting hood 11; Figure 2 As shown, the camera 3 is tilted downward at a certain angle to the horizontal direction; and the camera 3 is arranged near the front bottom of the smoke hood 11; the controller is connected to the camera 3 and the lifting module, and the controller is configured to: calculate the distance between the top of the pot 21 placed on the stove 2 and the bottom of the smoke hood 11 according to the image above the stove 2 taken by the camera 3 with zoom, and then control the lifting module to perform corresponding actions.

[0045] like Figure 6 As shown, the cooking device control method in this embodiment includes the following steps:

[0046] Step 1: The camera captures an image above the stove countertop, and calculates the distance h between the top of the pot and the countertop where the stove is located based on the image and camera installation information;

[0047] The specific steps are:

[0048] like Figure 5 As shown, the position of the camera is set as the origin O, the horizontal direction is the X-axis, and the vertical direction is the Y-axis to establish a coordinate system; the highest point of the pot is recorded as point P 2 , point P 2 The point projected onto the table where the stove is located is denoted as point P 1 , the point O is projected onto the table where the stove is located as point N; the camera shoots the pot and forms point M on the table where the stove is located, and point O and point M form the center line OM of the camera optical axis;

[0049]

[0050] Among them, P 1 D is line segment P 1 The length of D, point D is the extended line segment OP2 The point that falls on the countertop where the stove is located; ON is the length of the line segment ON;

[0051] This embodiment also includes: obtaining the horizontal distance d between the pot and the camera according to the following calculation formula;

[0052]

[0053] Where H is the vertical distance between the camera and the countertop where the stove is located, that is, the length of the line segment ON, which is a known value; α is the angle between the horizontal direction of the camera installation and the vertical direction of the installation; β 2 is the line segment OP 1 The angle formed with the center line OM of the camera optical axis;

[0054] In this embodiment, because α+∠NO P 1 +β 2 =90°, and ∠NOP 1 +∠OP 1 N=90°; so ∠OP 1 N=

[0055] α+β 2 ; and because Therefore

[0056] Because ∠NO P 1 =90°-∠OP 1 N, and the internal angle of the triangle ∠ODN+∠NOP 1 +β 1 +β 2 =90°, β 1 It is the angle formed between the line segment OD and the center line OM of the camera optical axis;

[0057] ∠ODN=90°-(∠NOP 1 +β 1 +β 2 )=90°-(90°-α-β 2 +β 1 +β 2 )=α-β 1

[0058] The length of the straight line ND can be expressed as:

[0059] Then, by the similarity law of triangles, triangle P 1 P 2 D is similar to triangle NOD, so

[0060]

[0061] Figure 5 Midpoint V 1 To extend the line segment P 1 O and the imaging point falling on the camera's photosensitive plate; point V 2 To extend the line segment P 2 Point U is the center point of the camera's photosensitive plate, that is, the point on the camera's photosensitive plate that falls on the extended line segment MO. OU is the distance between the camera and the photosensitive plate, that is, the focal length f.

[0062] According to the principle of equal vertex angles, β 1 , β 2 The focal length f of the camera and the imaging coordinate V on the photosensitive plate (CCD) can be used to calculate the 1 and V 2 Get (V 1 and V 2 You can mark the pot on the image to get it)

[0063]

[0064] According to β 1 and β 2 The specific value of is used to calculate the distance h between the top of the pot and the table where the stove is located and the horizontal distance d between the pot and the camera;

[0065] Step 2: Calculate the distance △h between the bottom of the air inlet assembly and the top of the pot placed on the stove according to the distance h between the top of the pot and the table where the stove is located, and judge whether the pot placed on the stove will collide with the bottom of the air inlet assembly. If so, control the air inlet assembly to rise, and control the fan of the range hood to adjust to the corresponding working gear according to the distance between the bottom of the air inlet assembly after the rise and the top of the pot placed on the stove, and end; if not, proceed to step 3;

[0066] In this embodiment, the distance △d between the rear side of the pot and the front side of the air inlet assembly is calculated according to the horizontal distance d between the pot and the camera; specifically, the diameter of the pot, the width of the table where the stove is located, and the width of the air inlet assembly are stored in the controller, so that the distance between the rear side of the pot and the rear side of the stove can be obtained; and △d is obtained by subtracting the width of the air inlet assembly from the distance between the rear side of the pot and the rear side of the stove;

[0067] The specific process of judging whether the pot placed on the cooker will collide with the bottom of the air inlet assembly is as follows:

[0068] If △d>0, whether the pot placed on the cooker will not collide with the bottom of the air inlet assembly;

[0069] If △d<0 and △h>0, whether the pot placed on the cooker will not collide with the bottom of the air inlet assembly;

[0070] If △d<0 and △h<0, whether the pot placed on the cooker will collide with the bottom of the air inlet assembly;

[0071] Step 3, determine whether the air inlet assembly is lowered to the lowest position. If so, control the lifting module to stop moving, switch the range hood fan to or maintain a low gear, and end; if not, control the lifting module to continue moving so that the air inlet assembly continues to descend, and proceed to step 1.

[0072] Should Figure 6 It also includes judging whether to turn on the intelligent operation mode of the air inlet component. The range hood in this embodiment can manually operate the lifting of the air inlet component, and the camera in this embodiment is not needed at this time; of course, in order to realize intelligent control, it is necessary to capture images through the camera, and then realize intelligent detection of whether the air inlet component in the space between the bottom of the range hood and the stove top will collide with the pot during the lifting movement, stop or adjust the height of the air inlet component in time, and then automatically adjust the fan gear according to the height of the air inlet component to meet the user's oil fume and noise experience.

[0073] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the technical principles of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. A cooking device control method, the cooking device comprising a range hood (1) and a cooker (2) located below the range hood (1), the range hood (1) comprising a fume hood (11), an air inlet assembly (12) constrained on the fume hood (11) in a manner capable of being lifted up and down relative to the fume hood (11), and a lifting module for driving the air inlet assembly (12) to lift up and down, characterized in that The cooking device also includes: A camera (3) is arranged on the front side of the smoke collecting hood (11); A controller connected to the camera (3) and the lifting module; The cooking device control method comprises the following steps: Step 1: The camera captures an image above the stove countertop, and calculates the distance h between the top of the pot and the countertop where the stove is located based on the image and camera installation information; The specific steps are: Set the location of the camera as the origin O, take the horizontal direction as the X-axis, and the vertical direction as the Y-axis to establish a coordinate system; record the highest point of the pot as point P2, record the point where point P2 is projected on the table where the stove is located as point P1, and record the point where point O is projected on the table where the stove is located as point N; Wherein, P1D is the length of line segment P1D, point D is the point where the extended line segment OP2 falls on the table where the stove is located; ND is the length of line segment ND; ON is the length of line segment ON; Step 2: Calculate the distance △h between the bottom of the air inlet assembly and the top of the pot placed on the stove according to the distance h between the top of the pot and the table where the stove is located, and judge whether the pot placed on the stove will collide with the bottom of the air inlet assembly. If so, control the air inlet assembly to rise, and control the fan of the range hood to adjust to the corresponding working gear according to the distance between the bottom of the air inlet assembly after the rise and the top of the pot placed on the stove, and end; if not, proceed to step 3; Step 3, determine whether the air inlet assembly is lowered to the lowest position. If so, control the lifting module to stop moving, switch the range hood fan to or maintain a low gear, and end; if not, control the lifting module to continue moving so that the air inlet assembly continues to descend, and proceed to step 1.

2. The cooking device control method according to claim 1, characterized in that: The step 1 also includes calculating the horizontal distance d between the pot and the camera; The camera shoots the pot and forms a point M on the table where the cooker is located. Point O and point M form the center line OM of the camera optical axis. The horizontal distance d between the pot and the camera is obtained according to the following calculation formula; Among them, H is the vertical distance between the camera and the countertop where the stove is located, that is, the length of the line segment ON; α is the angle formed by the horizontal direction of the camera installation and the vertical direction of the installation; β2 is the angle formed between the line segment OP1 and the center line OM of the camera optical axis.

3. The cooking device control method according to claim 2, characterized in that: The step 2 also includes calculating the distance Δd between the rear side of the cooker and the front side of the air inlet assembly based on the horizontal distance d between the cooker and the camera.

4. The cooking device control method according to claim 2, characterized in that: The imaging point on the photosensitive plate of the camera is recorded as point V1 by extending the line segment P1O, and the imaging point on the photosensitive plate of the camera is recorded as point V2 by extending the line segment P2O. The center point on the photosensitive plate of the camera is U, and point U is the point on the photosensitive plate of the camera that falls on the extended line segment MO. Wherein, V1U is the length of line segment V1U, and f is the focal length of the camera.

5. The cooking device control method according to claim 4, characterized in that: The length calculation formula of line segment ND is: Among them, β1 is the angle formed between the line segment OD and the center line OM of the camera optical axis, V2U is the length of line segment V2U.

6. The cooking device control method according to claim 3, characterized in that: The specific process of determining whether the pot placed on the cooker will collide with the bottom of the air inlet assembly in step 2 is as follows: If △d>0, whether the pot placed on the cooker will not collide with the bottom of the air inlet assembly; If △d<0 and △h>0, whether the pot placed on the cooker will not collide with the bottom of the air inlet assembly; If △d<0 and △h<0, whether the pot placed on the cooker will collide with the bottom of the air inlet assembly.

7. The cooking device control method according to any one of claims 1 to 6, characterized in that: The camera (3) is tilted downward at a certain angle to the horizontal direction.

8. The cooking device control method according to claim 7, characterized in that: The camera (3) is arranged adjacent to the front bottom of the smoke collecting hood (11).

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