Range hood
By installing a light emission and detection module on the range hood, obstacles are detected by light, and the control device drives the device to adjust its position, which solves the problem of insufficient accuracy of existing range hood anti-collision technology in low light environment, and realizes efficient non-contact anti-collision and fume treatment.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- NINGBO FOTILE KITCHEN WARE CO LTD
- Filing Date
- 2025-03-07
- Publication Date
- 2026-04-17
AI Technical Summary
Existing anti-collision technologies for range hoods suffer from slow response or limited accuracy in low-light environments. In particular, contact-based protection schemes require physical contact to detect collisions, while non-contact protection schemes experience performance degradation in low-light or complex lighting conditions.
It employs a light emission module and a light detection module to detect the environment around the range hood and the status of the operating table by emitting a first light beam and a second light beam. The control device controls the drive device to adjust the up and down movement of the range hood, thereby achieving non-contact anti-collision.
It improves the range hood's anti-collision capability, adapts to the location of smoke generation at different heights, enhances the smoke treatment effect, and maintains high-precision detection under various lighting conditions.
Smart Images
Figure CN224135910U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of range hood technology, and in particular to a range hood. Background Technology
[0002] Range hoods are an important type of kitchen appliance. Collision protection solutions for liftable range hoods include contact and non-contact methods. Contact protection methods determine whether a collision has occurred by detecting changes in pressure, current, or capacitance generated when the lower part of the range hood comes into contact with an obstacle. Non-contact protection methods include binocular ranging and speckle ranging. However, existing contact protection methods require physical contact to detect the collision, resulting in a slow response and potential damage to the range hood. Existing non-contact protection methods require sufficient ambient light or object texture to acquire images; their performance degrades significantly in low-light or complex lighting conditions, limiting their testing accuracy. Utility Model Content
[0003] The purpose of this utility model is to address at least one of the aforementioned existing technical problems by providing a range hood that uses a first light source and a second light source to determine whether the range hood has encountered an obstacle, thereby improving the anti-collision function of the range hood.
[0004] This utility model provides a range hood, which includes a light emitting module, a light detection module, a driving device, and a control device. The light emitting module emits a first light beam and a second light beam. The first light beam is transmitted from the light emitting module to the outer casing of the range hood along a first direction, and the second light beam is transmitted from the light emitting module to the operating table along a second direction. The light detection module detects the first light beam and the second light beam. The light detection module is electrically connected to the control device, and the control device is electrically connected to the driving device. The control device controls the driving device to turn on or off, and the driving device drives the range hood to move up and down.
[0005] In a possible implementation, the range hood includes an oil cup connected to the outer casing, the height direction of the oil cup being aligned with the second direction, and the control device controlling the drive device to shut down so that the range hood stops moving.
[0006] In a possible implementation, the light detection module and the light emission module are arranged adjacent to each other.
[0007] In a possible implementation, the angle between the first direction and the second direction is greater than 90°.
[0008] In a possible implementation, the range hood further includes a fan and a fan adjustment mechanism, wherein the light detection module is electrically connected to the fan adjustment mechanism, and the fan adjustment mechanism is used to adjust the speed of the fan.
[0009] In a possible implementation, the range hood further includes a beam splitter, wherein the light emitting module is an infrared light source, and the light emitted by the infrared light source is split into a first light ray and a second light ray by the beam splitter.
[0010] In a possible implementation, the light emitting module is disposed between the smoke collection port of the range hood and the control panel.
[0011] In a possible implementation, the light detection module and the light emission module are disposed on the outer wall of the oil cup.
[0012] In a possible implementation, the range hood further includes an alarm module, which is electrically connected to the control device and is used to output an alarm signal.
[0013] In a possible implementation, the range hood further includes a display module, which is electrically connected to the control device and is used to display the location information of the range hood.
[0014] The range hood provided by this utility model has the following beneficial effects:
[0015] This application provides a range hood, which includes a light emitting module, a light detection module, a drive device, and a control device. The light emitting module emits a first light beam and a second light beam. The first light beam is transmitted from the light emitting module to the outer casing of the range hood along a first direction, and the second light beam is transmitted from the light emitting module to the operating table along a second direction. The light detection module detects the first and second light beams. The light detection module is electrically connected to the control device, and the control device is electrically connected to the drive device. The control device controls the drive device to turn on or off, and the drive device drives the range hood to move up and down. The first and second light beams emitted by the light emitting module can be used to detect the environment around the range hood and the state of the operating table. The control device automatically adjusts the up and down movement of the range hood through the drive device to adapt to the position of smoke generation at different heights, thereby improving the smoke treatment effect. Attached Figure Description
[0016] To more clearly illustrate the technical solution of this utility model, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.
[0017] Figure 1 This is a schematic diagram of the structure of the range hood in the embodiment of this utility model;
[0018] Figure 2 This is a schematic diagram of the structure of the range hood in the embodiment of this utility model;
[0019] Figure 3 This is a schematic diagram of the protective system in an embodiment of the present invention;
[0020] Figure 4 This is a schematic diagram of the protection system in Embodiment 2 of this utility model;
[0021] Figure 5 This is a schematic diagram of the protection system in Embodiment 3 of this utility model.
[0022] The following is supplementary explanation of the attached figures:
[0023] 11. Optical emission module; 12. Optical detection module; 13. Drive device; 14. Control device; 15. Alarm module; 16. Display module; 2. Oil cup; 3. Housing; 40. Fan adjustment mechanism; 41. Fan; 5. Control panel. Detailed Implementation
[0024] The technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.
[0025] The term "an embodiment" or "embodiment" as used herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation of this application. In the description of this application, it should be understood that the terms "upper," "lower," "top," "bottom," etc., indicating orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings, are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. Moreover, the terms "first," "second," etc., are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of this application described herein can be implemented in orders other than those illustrated or described herein.
[0026] See Figure 1-2 This application provides a range hood, which includes a light emitting module 11, a light detection module 12, a drive device 13, and a control device 14. The light emitting module 11 emits a first light beam and a second light beam. The first light beam is transmitted from the light emitting module 11 to the outer casing 3 of the range hood along a first direction, and the second light beam is transmitted from the light emitting module 11 to the operating table 5 along a second direction. The light detection module 12 detects the first and second light beams. The light detection module 12 is electrically connected to the control device 14, and the control device 14 is electrically connected to the drive device 13. The control device 14 controls the drive device 13 to turn on or off, and the drive device 13 drives the range hood to move up and down. The first and second light beams emitted by the light emitting module 11 can be used to detect the environment around the range hood and the state on the operating table 5. The control device 14 automatically adjusts the up and down movement of the range hood through the drive device 13 to adapt to the position of smoke generation at different heights, thereby improving the effect of smoke treatment.
[0027] Understandably, range hoods include liftable range hoods, and anti-collision solutions for liftable range hoods include contact and non-contact solutions. Contact protection solutions determine whether a collision has occurred by detecting changes in pressure, current, or capacitance generated when the lower end of the range hood contacts an obstacle. Non-contact protection solutions include binocular ranging and speckle ranging. However, existing contact protection solutions require physical contact to detect collisions, resulting in slow response and potential damage to the range hood. Existing non-contact protection solutions require sufficient ambient light or object texture to acquire images, and their performance degrades significantly in low-light or complex lighting conditions, limiting testing accuracy. This application provides a protection system installed on a range hood to achieve anti-collision functionality.
[0028] Specifically, the protection system includes a light emitting module 11, a light detection module 12, a driving device 13, and a control device 14. The light emitting module 11 includes an infrared light source, preferably a line laser in the 850 / 940nm band. The light detection module 12 includes an infrared narrowband camera. Both the light emitting module 11 and the light detection module 12 are located outside the range hood. The first light beam is used to detect whether the range hood casing 3 encounters an obstacle, and the second light beam is used to detect whether the oil cup 2 encounters an obstacle. If an obstacle appears in the propagation path of the first light beam in the first direction L1, a break and translation will occur, indicating the presence of an obstacle. The second light beam in the second direction L2 needs to calculate the distance to the nearest object below the oil cup 2 based on the position of the second light beam to determine whether there is an obstacle within the travel range of the range hood oil cup 2.
[0029] In one embodiment, the height of the oil cup 2 is 10cm, and the transmission distance H of the second light in the second direction is 9cm. That is, if the transmission distance H of the second light in the second direction is less than the height of the oil cup 2, it is determined that there is an obstacle in the direction of movement of the range hood.
[0030] Specifically, the drive device 13 drives the range hood to move up and down to change the distance between the range hood's smoke collection port and the operating table 5, thereby changing the smoke exhaust effect.
[0031] Specifically, the range hood includes an oil cup 2, which is connected to the outer casing 3. The height of the oil cup 2 is aligned with the second direction. The control device 14 controls the drive device 13 to shut down, thus stopping the range hood from moving. The control device 14 controls the drive device 13 to stop based on the movement of the oil cup 2, effectively preventing excessive force on the oil cup 2 during the range hood's movement, thus preventing damage to the oil cup 2 or the outer casing 3, and improving the safety and durability of the range hood.
[0032] Specifically, the second light beam is transmitted from the second direction to the operating table 5 and returns to the light detection module 12. The light detection module 12 is used to detect the transmission length of the second light beam from the second direction and compare it with the height of the oil cup 2. If the transmission length of the second light beam from the second direction is less than the height of the oil cup 2, then there is an obstacle under the range hood, and the range hood stops moving.
[0033] Specifically, the optical detection module 12 and the optical emission module 11 are arranged adjacent to each other. This reduces the loss and interference of optical signals during transmission, ensuring that the light emitted by the optical emission module 11 can be accurately detected by the optical detection module 12, thereby improving measurement accuracy.
[0034] Specifically, the capture range of the light emitting module 11 is greater than the emission range of the first light ray and the second light ray, and the light emitting module 11 includes a camera.
[0035] In one embodiment, the light detection module 12 and the light emission module 11 are located in the same position.
[0036] Specifically, the angle between the first direction and the second direction is greater than 90°. The first and second light rays can cover the working area of the range hood, ensuring that obstacles on the range hood's outer casing 3 and the control panel 5 can be effectively monitored, avoiding accidental contact or accidents, and improving the safety of user operation.
[0037] In one embodiment, the angle between the first direction L1 and the second direction L2 is 90°-150°; in another embodiment, the angle between the first direction L1 and the second direction L2 is 90°-120°.
[0038] Specifically, the plane containing the first direction L1 and the second direction L2 is perpendicular to the plane containing the operating table 5.
[0039] Furthermore, the range hood also includes a fan 41 and a fan adjustment mechanism 40. The light detection module 12 is electrically connected to the fan adjustment mechanism 40, which is used to adjust the speed of the fan 41. The light detection module 12 can monitor changes in smoke or light in the kitchen environment in real time and automatically adjust the speed of the fan 41 according to the detected smoke concentration, which can effectively improve the smoke extraction efficiency. Through the linkage between the light detection module 12 and the fan adjustment mechanism 40, the automated smoke extraction function is realized.
[0040] Specifically, the path of the second light beam covers the smoke collection port. When there is no smoke, the image detected by the light detection module 12 shows a bright, regular line. When a hand or kitchen utensil blocks the light, the position of the bright line in the image detected by the light detection module 12 changes, but it remains relatively regular and bright. When there is smoke, a random, low-brightness image resembling smoke appears around the bright line in the image detected by the light detection module 12. Based on the size and intensity of the remaining low-brightness image after deducting the image of the bright laser line itself within the field of view of the camera, and comparing it with the preset intensity, the smoke concentration is calculated, and the range hood speed is adjusted accordingly.
[0041] Specifically, in the presence of smoke, the range hood stops moving and the fan adjustment mechanism 40 is turned on, which adjusts the fan 41 to a preset level to exhaust the smoke.
[0042] Specifically, the fan speed setting 41 is positively correlated with the smoke concentration; the higher the smoke concentration, the higher the fan speed setting 41 should be.
[0043] Furthermore, the range hood also includes a beam splitter. The light emitting module 11 is an infrared light source, and the light emitted by the infrared light source is split into a first ray and a second ray by the beam splitter. By splitting the light from a single infrared light source into a first ray and a second ray by the beam splitter, the complexity and cost of the light emitting module 11 are reduced.
[0044] In one embodiment, the light emitting module 11 is an infrared point light source, which emits two laser lines after passing through a diffraction device, namely a first laser line and a second laser line; in another embodiment, the light emitting module 11 is a single laser line module, which is split into a first laser line and a second laser line by a beam splitter.
[0045] Specifically, the first and second rays originate from the same infrared light source and have the same wavelength and characteristics. Infrared light is generally invisible and does not affect the kitchen's lighting environment. Users will not perceive the presence of infrared light when operating the range hood, thus ensuring the range hood's functionality without compromising the user experience.
[0046] In one embodiment, the light emitting module 11 is disposed between the smoke collection port of the range hood and the operating table 5. By positioning the light emitting module 11 between the smoke collection port and the operating table 5, the amount of oil fumes rising from the operating table 5 can be directly detected, the oil fume concentration can be determined in real time, and the smoke extraction efficiency can be improved.
[0047] Specifically, the height and emission angle of the light emitting module 11 are designed to capture the fumes rising from the operating table 5. In one possible implementation, the light emitting module 11 is positioned on the outer wall of the oil cup 2 near the outer wall of the range hood housing 3; in another possible implementation, the light emitting module 11 is positioned on the outer wall of the oil cup 2 near the outer wall of the operating table 5.
[0048] In one embodiment, the light detection module 12 and the light emission module 11 are disposed on the outer wall of the oil cup 2. This prevents the light detection module 12 and the light emission module 11 from being directly contaminated or covered by oil fumes, ensuring detection accuracy and reducing false alarms caused by oil affecting light propagation. The outer wall of the oil cup 2 is relatively far from the smoke collection port and oil fume path of the range hood, reducing the risk of contamination of the optical sensors and extending the service life and operational stability of the light detection module 12 and the light emission module 11.
[0049] Specifically, the light detection module 12 and the light emission module 11 are detachably connected to the oil cup 2. The emission angle of the light detection module 12 and the detection angle of the light emission module 11 are adjustable.
[0050] Furthermore, the range hood also includes an alarm module 15, which is electrically connected to the control device 14 and is used to output an alarm signal. When the light detection module 12 detects an abnormality, the alarm module 15 immediately issues an alarm signal, improving the safety of using the range hood.
[0051] In one embodiment, the alarm module 15 is electrically connected to the control device 14, and the control device 14 is electrically connected to the light detection module 12. When the range hood encounters an obstacle or the smoke concentration exceeds a preset concentration, the alarm module 15 outputs an alarm signal to alert the user to the operating status of the range hood.
[0052] Optionally, the alarm module 15 may be a buzzer or an LED indicator, etc.
[0053] Furthermore, the range hood also includes a display module 16, which is electrically connected to the control device 14. The display module 16 is used to display the position information of the range hood. In this way, the display module 16 can help users intuitively understand the operating status of the range hood, making it convenient for users to adjust or operate it in a timely manner.
[0054] In one embodiment, the display module 16 is an LCD or LED display screen. The display module 16 displays the position information of the range hood, including height and current position. The size and resolution of the display module 16 are selected according to the model of the range hood and user requirements. The display module 16 is mounted on the front panel or side panel of the range hood. The light detection module 12 is connected to the control device 14 via an I2C interface, UART interface, or analog signal interface. The display module 16 is connected to the control device 14 via a serial interface (such as SPI, I2C) or GPIO pins to ensure that the display module 16 can receive and display the position information obtained from the light detection module 12.
[0055] The working process of the range hood in this application embodiment is described below with reference to a specific application scenario:
[0056] When the range hood is turned on, the light emitting module 11 emits a first light beam and a second light beam via a beam splitter to the outer casing 3 and the control panel 5 of the range hood, respectively.
[0057] If there are no obstacles in the movement path of the range hood, the drive device 13 drives the range hood to descend by a preset unit; if there are obstacles in the movement path of the range hood, the range hood stops descending, the light detection module 12 detects the comprehensive value of the smoke scattering intensity and compares it with the preset intensity, the fan adjustment mechanism 40 adjusts the operating level of the fan 41, and the smoke is transmitted from the control panel to the smoke collection port.
[0058] The drive unit 13 drives the range hood to descend to the preset safe position, and the drive unit 12 is turned off, and the range hood stops descending.
[0059] The following describes specific embodiments of this application based on the above technical solution.
[0060] Example 1
[0061] Please see Figures 1-3 This embodiment provides a range hood, which includes a light emitting module 11, a light detection module 12, a drive device 13, and a control device 14. The light emitting module 11 emits a first light beam and a second light beam. The first light beam is transmitted from the light emitting module 11 to the outer casing 3 of the range hood along a first direction, and the second light beam is transmitted from the light emitting module 11 to the operating table 5 along a second direction. The light detection module 12 detects the first and second light beams. The light detection module 12 is electrically connected to the control device 14, and the control device 14 is electrically connected to the drive device 13. The control device 14 controls the drive device 13 to turn on or off, and the drive device 13 drives the range hood to move up and down. The light detection module 12 and the light emitting module 11 are disposed on the outer wall of the oil cup 2.
[0062] The light emitting module 11 includes an infrared light source, selected as a line laser in the 850 / 940nm band, and the light detection module 12 includes an infrared narrowband camera. Both the light emitting module 11 and the light detection module 12 are located outside the range hood. The first light beam is used to detect whether the range hood casing 3 encounters an obstacle, and the second light beam is used to detect whether the oil cup 2 encounters an obstacle. If an obstacle appears in the propagation path of the first light beam in the first direction L1, a break and translation will occur, at which point it is determined that an obstacle exists. The second light beam in the second direction L2 needs to calculate the distance to the nearest object below the oil cup 2 based on the position of the second light beam to determine whether there is an obstacle within the travel range of the range hood oil cup 2.
[0063] The range hood includes an oil cup 2, which is connected to the outer casing 3. The height direction of the oil cup 2 is aligned with the second direction. The control device 14 controls the drive device 13 to shut down, causing the range hood to stop moving. The light detection module 12 is positioned in the same location as the light emission module 11. The angle between the first direction L1 and the second direction L2 is 90°-120°, and the plane containing the first direction L1 and the second direction L2 is perpendicular to the plane containing the operating table 5.
[0064] The range hood also includes a fan 41 and a fan adjustment mechanism 40. The light detection module 12 is electrically connected to the fan adjustment mechanism 40, which is used to adjust the speed of the fan 41. The path of the second light beam covers the smoke collection port. When there is no smoke, the image detected by the light detection module 12 is a bright, regular line. When a hand or kitchen utensil blocks the light, the position of the bright line in the image detected by the light detection module 12 changes, but it remains relatively regular and bright. When there is smoke, a random, low-brightness image resembling smoke appears around the bright line in the image detected by the light detection module 12. In the presence of smoke, the range hood stops moving and the fan adjustment mechanism 40 is activated, adjusting the fan 41 to a preset speed to exhaust the smoke.
[0065] Example 2
[0066] See Figure 4 The similarities between Embodiment 2 and Embodiment 1 will not be repeated here. The difference between Embodiment 2 and Embodiment 1 is that the range hood also includes an alarm module 15, which is electrically connected to the control device 14 and is used to output an alarm signal. When the light detection module 12 detects an abnormality, the alarm module 15 immediately issues an alarm signal, improving the safety of using the range hood.
[0067] Example 3
[0068] See Figure 5 The similarities between Embodiment 3 and Embodiment 1 will not be repeated here. The difference between Embodiment 3 and Embodiment 1 is that the range hood also includes a display module 16. The display module 16 is electrically connected to the control device 14 and is used to display the position information of the range hood. Embodiment 3 helps users intuitively understand the operating status of the range hood, facilitating timely adjustments or operations. The display module 16 uses an LCD or LED display screen to display the position information of the range hood, including height and current position.
[0069] The above-disclosed embodiments are merely several preferred embodiments of the present utility model and should not be construed as limiting the scope of the present utility model. Therefore, any equivalent variations made in accordance with the claims of the present utility model shall still fall within the scope of the present utility model.
Claims
1. A range hood characterized by, The range hood includes a light emitting module (11), a light detection module (12), a drive device (13), and a control device (14). The light emitting module (11) is used to emit a first light beam and a second light beam. The first light beam is transmitted from the light emitting module (11) to the outer casing (3) of the range hood along a first direction, and the second light beam is transmitted from the light emitting module (11) to the operating table (5) along a second direction. The light detection module (12) is used to detect the first light beam and the second light beam. The light detection module (12) is electrically connected to the control device (14), and the control device (14) is electrically connected to the drive device (13). The control device (14) is used to control the drive device (13) to turn on or off, and the drive device (13) is used to drive the range hood to move up and down.
2. The range hood according to claim 1, characterized in that, The range hood includes an oil cup (2), which is connected to the outer casing (3). The height direction of the oil cup (2) is consistent with the second direction. The control device (14) controls the drive device (13) to shut down so that the range hood stops moving.
3. The hood according to claim 1, characterized in that, The optical detection module (12) is arranged adjacent to the optical emission module (11).
4. The hood according to any one of claims 1-3, characterized in that, The angle between the first direction and the second direction is greater than 90°.
5. The hood according to any one of claims 1-3, characterized in that, The range hood also includes a fan (41) and a fan adjustment mechanism (40). The light detection module (12) is electrically connected to the fan adjustment mechanism (40), and the fan adjustment mechanism (40) is used to adjust the speed of the fan (41).
6. The hood according to any one of claims 1-3, characterized in that, The range hood also includes a beam splitter, and the light emitting module (11) is an infrared light source. The light emitted by the infrared light source is split into a first light and a second light by the beam splitter.
7. The hood according to claim 5, characterized in that, The light emitting module (11) is located between the smoke collection port of the range hood and the operating table (5).
8. The range hood according to claim 2, characterized in that, The light detection module (12) and the light emission module (11) are disposed on the outer wall of the oil cup (2).
9. The hood according to any one of claims 1-3, characterized in that, The range hood also includes an alarm module (15), which is electrically connected to the control device (14) and is used to output an alarm signal.
10. The hood according to any one of claims 1-3, characterized in that, The range hood also includes a display module (16), which is electrically connected to the control device (14) and is used to display the location information of the range hood.