Range hood and control method thereof

Abstract

The present invention discloses a range hood and a control method thereof. The range hood includes a detection unit and a windshield. The control method includes: obtaining a target distance between the detection unit and an obstacle; and controlling the range hood to descend based on the relationship between the target distance and a first preset distance and a second preset distance. The first preset distance is determined by the vertical distance from the detection unit to the upper edge of the windshield and the angle between the plane containing the optical axis of the detection unit and the vertical direction. The second preset distance is determined by the vertical distance from the detection unit to the stove and the angle. The present invention greatly improves the intelligence level of range hoods with automatic lifting functions, prevents collisions between the range hood and cookware, and ensures user safety, thereby improving the product experience and service life.

Description

Technical Field

[0001] The present invention relates to the technical field of kitchen appliances, in particular to a range hood with an automatic lifting function. Background Art

[0002] There are range hoods on the market with automatic lifting functions. The range hood is directly operated by the user during the lowering process. However, due to the wide variety of cookware, if the user does not operate in time, the range hood is likely to collide with the cookware, thereby reducing the user experience and threatening the user's safety.

[0003] Currently, existing range hoods are easily interfered with by the cooking process, including human movements, handheld objects entering the detection area, or large amounts of water vapor, which can cause signal detection to fail, resulting in collisions between the range hood and the cookware or the user. Summary of the Invention

[0004] The technical problem to be solved by the present invention is to overcome the problem in the prior art that a range hood with an automatic lifting function is prone to collide with pots or users when it automatically descends, and to provide a range hood and a control algorithm thereof.

[0005] The present invention solves the above technical problems through the following technical solutions:

[0006] A first aspect of the present invention provides a control method for a range hood, wherein the range hood includes a detection unit and a windshield, and the control method includes:

[0007] Obtaining a target distance between the detection unit and an obstacle, wherein the obstacle includes an object within a detection range of the detection unit, and the number of the obstacle is at least one;

[0008] controlling the range hood to descend according to a relationship between the target distance and the first preset distance and the second preset distance;

[0009] The first preset distance is determined by the vertical distance from the detection unit to the upper edge of the wind shield and the angle between the plane where the optical axis of the detection unit is located and the vertical direction, and the second preset distance is determined by the vertical distance from the detection unit to the cooker and the angle.

[0010] Preferably, the detection unit includes a first camera and a second camera;

[0011] The optical axis of the first camera and the optical axis of the second camera are in the same plane, and the step of obtaining the target distance between the detection unit and the obstacle specifically includes:

[0012] Acquire first image data captured by the first camera and second image data captured by the second camera;

[0013] The target distance is determined based on the first image data and the second image data.

[0014] Preferably, the step of controlling the range hood to descend according to the relationship between the target distance, the first preset distance, and the second preset distance specifically includes:

[0015] If there is a target distance less than or equal to the first preset distance, it is determined that there is interference within the detection range, and a first reminder message is output during the process of controlling the range hood to descend, wherein the first reminder message is used to remind that there is interference within the detection range.

[0016] Preferably, the step of controlling the range hood to descend according to the relationship between the target distance, the first preset distance, and the second preset distance specifically includes:

[0017] If there is a target distance that is greater than the first preset distance and less than the second preset distance, it is determined that there is a pot within the detection range, and the range hood is controlled to descend.

[0018] Preferably, the step of controlling the range hood to descend specifically includes:

[0019] determining a descent distance according to the target distance, the first preset distance, and the angle;

[0020] Controlling the range hood to descend the descending distance.

[0021] Preferably, the control method further includes:

[0022] If the descending distance is greater than the maximum distance that the range hood can descend, the range hood is controlled to descend the maximum distance.

[0023] Preferably, the step of controlling the range hood to descend specifically includes:

[0024] If it is detected that the range hood has descended the maximum distance that the range hood can descend, a second reminder message is output, wherein the second reminder message is used to remind that the range hood has reached the lowest height.

[0025] Preferably, the control method further includes:

[0026] If the target distance is equal to the second preset distance, it is determined that there is no cookware within the detection range, and / or a third reminder message is output, wherein the third reminder message is used to remind that no cookware is placed.

[0027] Preferably, after the step of controlling the range hood to descend according to the relationship between the target distance and the first preset distance and the second preset distance, the method further includes: controlling the range hood to ascend to a starting position in response to an ascending instruction.

[0028] A second aspect of the present invention provides a range hood, comprising a detection unit, a control unit, and a windshield, wherein the control unit is configured to execute the above-mentioned control method.

[0029] On the basis of conforming to the common sense in this field, the above-mentioned preferred conditions can be arbitrarily combined to obtain the preferred embodiments of the present invention.

[0030] The present invention's positive advancement lies in controlling the range hood's descent based on the target distance between the detection unit and the obstacle, the vertical distance from the detection unit to the upper edge of the windshield, the angle between the plane containing the optical axis of the detection unit and the vertical direction, and the vertical distance from the detection unit to the stove. This data-driven approach allows for more intelligent range hood descent, resolving the issue of automatic range hoods colliding with obstacles during descent, ensuring user safety, a superior user experience, and a long product lifespan. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 This is a flow chart of a range hood control method provided in Example 1 of the present invention.

[0032] Figure 2 This is a structural schematic diagram of a range hood provided in Example 2 of the present invention. DETAILED DESCRIPTION

[0033] The present invention is further described below by way of examples, but the present invention is not limited to the scope of the examples.

[0034] Example 1

[0035] This embodiment provides a control method for a range hood, wherein the range hood includes a detection unit and a windshield. Figure 1 As shown, the control method includes:

[0036] S1. Obtaining a target distance between a detection unit and an obstacle, wherein the obstacle includes an object within a detection range of the detection unit, and the number of the obstacle is at least one;

[0037] S2, controlling the range hood to descend according to the relationship between the target distance and the first preset distance L1 and the second preset distance L2;

[0038] Among them, the first preset distance L1 is determined by the vertical distance H1 from the detection unit to the upper edge of the windshield and the angle α between the plane where the optical axis in the detection unit is located and the vertical direction, and the second preset distance L2 is determined by the vertical distance H2 between the detection unit and the cooker and the angle α.

[0039] Specifically, a recommended value of the angle α is less than arctan(C / H1), where C is the horizontal distance between the outer edge of the windshield in the open state and the installation position of the detection unit.

[0040] In a specific implementation, it can be set as L1 = H1 / cosα, L2 = H2 / cosα, where L1 and L2 are stored in a specified data storage area to facilitate subsequent calls.

[0041] In one embodiment, the detection unit includes a first camera and a second camera; the optical axis of the first camera and the optical axis of the second camera are in the same plane. In a specific embodiment, the parameters of the first camera and the second camera can be the same.

[0042] In one feasible solution, step S1 includes:

[0043] S101, obtaining first image data P1 captured by a first camera and second image data P2 captured by a second camera;

[0044] S102 , determining a target distance according to the first image data P1 and the second image data P2 .

[0045] In a specific implementation, step S102 includes:

[0046] S1021, performing image edge detection on the first image data P1 and the second image data P2 to obtain processed image data P 1提取 、P 2提取 ;

[0047] S1022, P 1提取 The data is mainly edge data of objects. 2提取 Find spatial corresponding points in the data, calculate the disparity, and form the disparity data set Par;

[0048] S1023, calculate P according to the system parameters of the first camera and the second camera and the parallax data set Par. 1提取 The distance between the edge of the obstacle and the line connecting the first camera and the second camera is the target distance Dep[i].

[0049] Specifically, the target distance Dep[i] obtained in step S103 is at least one, that is, i≥1.

[0050] In an implementable solution, the above-mentioned step S2 includes step S201: if there is a target distance less than or equal to a first preset distance, it is determined that there is interference within the detection range, and a first reminder message is output during the process of controlling the range hood to descend, wherein the first reminder message is used to remind that there is interference within the detection range.

[0051] In an implementable solution, the above step S2 includes step S202: if there is a target distance greater than the first preset distance and less than the second preset distance, it is determined that there is a pot within the detection range, and the range hood is controlled to descend.

[0052] In one feasible solution, when it is determined that a cookware exists within the detection range, step S202 specifically includes:

[0053] S2021, determining a descent distance h according to the target distance Dep[i], the first preset distance L1, and the angle α;

[0054] S2022. Control the range hood to descend a distance h.

[0055] Here, h can be set to h=(Dep[i]-L1)*cosα.

[0056] In the specific implementation, the range hood can be lowered to a limited distance. Assume that the maximum distance the range hood can be lowered is h max In a specific example, the maximum distance h that the range hood can descend is max is 300.

[0057] In an practicable solution, step S2022 specifically includes: if the descending distance is greater than the maximum distance that the range hood can descend, that is, h>h max , then control the range hood to descend h max .

[0058] In an practicable solution, the step of controlling the range hood to descend specifically includes: if it is detected that the range hood has descended max , then output a second reminder message, wherein the second reminder message is used to remind that the range hood has reached the lowest height.

[0059] In an implementable solution, the control method further includes the following steps: if there is a target distance Dep[i] equal to the second preset distance L2, determining that there is no pot within the detection range, and / or outputting a third reminder message, wherein the third reminder message is used to remind that no pot is placed.

[0060] In an practicable solution, step S2 further includes the following steps: in response to the rising instruction, controlling the range hood to rise to the starting position.

[0061] In a specific implementation, after cooking is finished, the user can issue an ascending command by voice or button.

[0062] In the field of kitchen appliances, particularly range hoods with automatic lift functions, the range hood's lowering is controlled based on the target distance between the detection unit and obstacles, the vertical distance from the detection unit to the upper edge of the windshield, the angle between the plane containing the optical axis of the detection unit and the vertical direction, and the vertical distance from the detection unit to the stove. This data-driven control allows for more intelligent lowering of the range hood, resolving the issue of automatic range hoods colliding with obstacles during their automatic descent, ensuring user safety, a superior user experience, and the product's longevity.

[0063] Example 2

[0064] This embodiment provides a range hood, which includes a detection unit, a control unit and a windshield 1, wherein the control unit is configured to execute the above-mentioned control method. Figure 2 The range hood structure shown is merely an example and should not limit the functions and scope of use of the embodiments of the present invention.

[0065] The wind shield 1 opens and closes according to the working state of the range hood. When the range hood is working, the wind shield 1 is opened.

[0066] In one feasible solution, Figure 2 As shown, the detection unit includes a binocular camera 2 and an illuminating lamp 3. The binocular camera 2 includes a first camera and a second camera; the optical axis of the first camera and the optical axis of the second camera are in the same plane; and the parameters of the first camera and the second camera are consistent.

[0067] In specific implementation, Figure 2 As shown, the lighting lamp 3 is installed below the outer cover of the range hood motor volute, and a binocular camera 2 is installed inside the shell of the lighting lamp 3; the outer periphery of the shell of the lighting lamp 3 is decorated with a lighting lamp edging 4, and a light hole is provided at the position where the optical path of the binocular camera 2 passes through the lighting lamp edging 4, and the optical axis distance between the first camera and the second camera is D.

[0068] Specifically, the range hood may further include a lifting mechanism 5. In one feasible solution, as Figure 2 As shown, the lifting mechanism 5 is connected to the wall and is used to control the lifting of the range hood.

[0069] In one embodiment, the control unit may further include a signal output device, such as a buzzer or a speaker. In a specific embodiment, by outputting different instructions to the signal output device, the signal output device may output different reminder messages, including the first reminder message, the second reminder message, and the third reminder message. In one specific example, the buzzer vibrates for 5 seconds after receiving the first instruction to alert the user that there is interference within the detection range, and vibrates for 1 second after receiving the second instruction to alert the user that the range hood has reached its lowest height. The speaker plays a voice message after receiving the third instruction to remind the user that no pots are placed.

[0070] Although specific embodiments of the present invention have been described above, those skilled in the art will appreciate that these are merely illustrative and that the scope of the present invention is defined by the appended claims. Those skilled in the art may make various changes or modifications to these embodiments without departing from the principles and essence of the present invention, and such changes and modifications are intended to fall within the scope of the present invention.

Claims

1. A range hood control method, characterized in that: The range hood includes a detection unit and a windshield, and the control method includes: Obtaining a target distance between the detection unit and an obstacle, wherein the obstacle includes an object within a detection range of the detection unit, and the number of the obstacle is at least one; controlling the range hood to descend according to a relationship between the target distance and the first preset distance and the second preset distance; The first preset distance is determined by the vertical distance from the detection unit to the upper edge of the windshield and the angle between the plane where the optical axis of the detection unit is located and the vertical direction, and the second preset distance is determined by the vertical distance from the detection unit to the cooker and the angle; The step of controlling the range hood to descend according to the relationship between the target distance and the first preset distance and the second preset distance specifically includes: If there is a target distance less than or equal to the first preset distance, it is determined that there is interference within the detection range, and a first reminder message is output during the process of controlling the range hood to descend, wherein the first reminder message is used to remind that there is interference within the detection range; If there is a target distance that is greater than the first preset distance and less than the second preset distance, it is determined that there is a pot within the detection range, and the range hood is controlled to descend.

2. The control method according to claim 1, characterized in that: The detection unit includes a first camera and a second camera; The optical axis of the first camera and the optical axis of the second camera are in the same plane, and the step of obtaining the target distance between the detection unit and the obstacle specifically includes: Acquire first image data captured by the first camera and second image data captured by the second camera; The target distance is determined based on the first image data and the second image data.

3. The control method according to claim 1, wherein: The step of controlling the range hood to descend specifically includes: determining a descent distance according to the target distance, the first preset distance, and the angle; Controlling the range hood to descend the descending distance.

4. The control method according to claim 3, characterized in that: The control method further includes: If the descending distance is greater than the maximum distance that the range hood can descend, the range hood is controlled to descend the maximum distance.

5. The control method according to claim 1, characterized in that: The step of controlling the range hood to descend specifically includes: If it is detected that the range hood has descended the maximum distance that the range hood can descend, a second reminder message is output, wherein the second reminder message is used to remind that the range hood has reached the lowest height.

6. The control method according to claim 1, characterized in that: The control method further includes: If the target distance is equal to the second preset distance, it is determined that there is no cookware in the detection range, and / or a third reminder message is output, wherein the third reminder message is used to remind that no cookware is placed.

7. The control method according to any one of claims 1 to 6, characterized in that: After the step of controlling the range hood to descend according to the relationship between the target distance and the first preset distance and the second preset distance, the method further includes: In response to the rising instruction, the range hood is controlled to rise to a starting position.

8. A range hood, characterized in that: The range hood includes a detection unit, a control unit, and a windshield, wherein the control unit is configured to execute the control method according to any one of claims 1 to 7.

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