A range hood and a control method thereof

Abstract

Embodiments of the present application provide an extractor hood and an extractor hood control method. The extractor hood comprises a cabinet assembly, a smoke collecting assembly, a driving device, a first distance measuring device, a second distance measuring device and a controller. The smoke collecting assembly is connected to the cabinet assembly in a liftable manner, and the smoke collecting assembly is provided with an air inlet. The driving device is connected to the smoke collecting assembly to drive the smoke collecting assembly to lift. The first distance measuring device and the second distance measuring device are distributed upward and downward, and are both arranged on the smoke collecting assembly and face forward, for detecting distances and generating a first distance signal and a second distance signal respectively. The controller is used for acquiring the first distance signal and the second distance signal in real time, and controlling the driving device to drive the smoke collecting assembly, so that the upper edge of the cooking utensil corresponding to the smoke collecting assembly is located between the first distance measuring device and the second distance measuring device in the vertical direction. The extractor hood can accurately detect the state of the cooking utensil in front of the extractor hood, and then can realize accurate lifting control of the smoke collecting assembly.

Description

Technical Field

[0001] This application relates to the field of kitchen appliances technology, specifically to a range hood and a range hood control method. Background Technology

[0002] Range hoods are widely used in kitchens. Cooking produces fumes, and using a range hood effectively reduces these fumes. For users, this not only reduces the amount of fumes inhaled, protecting their health, but also keeps the kitchen clean.

[0003] Some existing range hoods can automatically adjust the height of the air intake according to the height of the cooking utensils, so that the air intake is as close as possible to the cooking utensils, thereby maximizing the smoke extraction effect.

[0004] However, when these range hoods are working, they may have difficulty detecting changes in the cooking utensils below and thus failing to adjust the height of the air intake accordingly, resulting in suboptimal smoke extraction and a poor user experience. Summary of the Invention

[0005] To at least partially address the problems existing in the prior art, according to one aspect of this application, a range hood is provided, including a housing assembly, a smoke collection assembly, a drive device, a first distance measuring device, a second distance measuring device, and a controller. The smoke collection assembly is vertically and flexibly connected to the housing assembly, and has an air intake on it. The drive device is connected to the smoke collection assembly and is used to drive the smoke collection assembly to move up and down. The first and second distance measuring devices are vertically distributed, both mounted on the smoke collection assembly and facing forward, and are used to detect distance and generate a first distance measuring signal and a second distance measuring signal, respectively. The controller is connected to the drive device, the first distance measuring device, and the second distance measuring device, and is used to acquire the first and second distance measuring signals in real time, and, based on the first and second distance measuring signals, control the drive device to drive the smoke collection assembly so that the upper edge of the cooking appliance corresponding to the smoke collection assembly is vertically positioned between the first and second distance measuring devices.

[0006] In the above technical solution, because the first and second ranging devices, which rise and fall synchronously with the smoke collection component, can acquire real-time distance information in front of it, they can accurately detect the state of the cooking utensils in front of them, thereby enabling precise control of the rising and falling of the smoke collection component within the suction range. In particular, any changes in the cooking utensils during the cooking process, such as raising the utensils, can be sensitively detected by the first and second ranging devices, allowing for adaptive and automatic control of the smoke collection component. Therefore, while ensuring the convenience of user cooking operations, the efficiency of the range hood in removing cooking fumes can be greatly improved, thus significantly enhancing the user experience.

[0007] For example, the first ranging device is closer to the chassis assembly than the second ranging device. The controller controls the drive device to drive the smoke collection assembly according to the first ranging signal and the second ranging signal, including performing the following operations: when the distance shown by the first ranging signal and the distance shown by the second ranging signal are both less than a preset distance, the controller controls the drive device to drive the smoke collection assembly to rise until the distance shown by the first ranging signal is greater than the preset distance and controls the drive device to stop operating.

[0008] The aforementioned technical solution not only ensures that the upper edge of the cooking appliance is positioned between the first and second ranging devices in height, thus guaranteeing the smoke extraction effect of the range hood; it is also logically simple, easy to implement, and less prone to errors. Furthermore, when the height of the cooking appliance increases, for example, when a new pot is added to the top of the cooking appliance, the smoke collection component can be controlled to rise promptly and accurately, improving the user experience.

[0009] For example, the first ranging device is closer to the chassis assembly than the second ranging device. The controller controls the drive device to drive the smoke collection assembly according to the first ranging signal and the second ranging signal, including performing the following operations: when the distance shown by the first ranging signal and the distance shown by the second ranging signal are both greater than a preset distance, the controller controls the drive device to drive the smoke collection assembly to descend until the distance shown by the second ranging signal is less than the preset distance, and then controls the drive device to stop operating.

[0010] The aforementioned technical solution not only ensures that the upper edge of the cooking appliance is positioned between the first and second ranging devices in height, thus guaranteeing the smoke extraction effect of the range hood; it also features simple logic, is easy to implement, and is less prone to errors. Furthermore, when the height of the cooking appliance is lowered, for example, when part of the pot is removed from the top, the smoke collection component can be controlled to descend promptly and accurately, improving the user experience.

[0011] For example, the first ranging device is closer to the chassis assembly than the second ranging device, the range hood also includes an output device, and the controller is further configured to control the output device to alarm when the distance indicated by the first ranging signal is less than a preset distance and the distance indicated by the second ranging signal is greater than the preset distance.

[0012] In the above technical solution, when the ranging signals generated by the first and second ranging devices cannot accurately reflect the height of the cooking utensils, an alarm message is output. This can help users to promptly learn about and adjust the abnormal operation of the range hood, and prevent the range hood from operating abnormally for a long time.

[0013] For example, the controller is also configured to control the drive device to drive the smoke collection assembly to the highest position when it is determined that the range hood is turned on and / or turned off.

[0014] Raising the smoke collection assembly to its highest position when the range hood is turned on ensures accurate control during operation, improves reliability, and simplifies control logic. Raising the assembly to its highest position when the range hood is turned off provides maximum space for users when not in use. It also prevents the assembly from being exposed and contaminated when the range hood is off, thus protecting it from aesthetics. Furthermore, raising it to its highest position also prevents accidental collisions that could cause injury to people or the machine.

[0015] For example, there are multiple driving devices, and the number of smoke collection components is the same as the number of driving devices. The driving devices drive the smoke collection components one-to-one, and each smoke collection component is provided with a first ranging device and a second ranging device.

[0016] In the above technical solution, the range hood includes multiple smoke collection components and corresponding drive devices. This allows for independent control of the smoke collection component for each burner at the optimal smoke exhaust height, achieving the best smoke exhaust effect, while also simplifying the control logic of the smoke collection components.

[0017] For example, the center point of the horizontal projection of the first ranging device and the second ranging device is located on the longitudinal central axis of the horizontal projection of the stove head.

[0018] According to the above solution, by placing the first and second ranging devices near the center and rear of the burner head, the presence of cooking appliances can be effectively and accurately detected, avoiding detection errors. This allows the smoke collection assembly to be raised and lowered to the most suitable height. Furthermore, this enables efficient use of the range hood while facilitating user cooking operations.

[0019] For example, the distance between the first ranging device and the second ranging device is 3 to 5 centimeters.

[0020] The aforementioned technical solution reduces the probability of the controller misjudging the position of the upper edge of the cooking appliance and can accommodate most cooking appliances on the market, more accurately determining the current height of the cooking appliance. This ensures that the smoke collection component is always kept in the optimal smoke collection position in real time, thereby guaranteeing the smoke extraction effect of the range hood.

[0021] For example, the first ranging device and the second ranging device are ultrasonic ranging devices.

[0022] Because ultrasonic ranging devices are stable, low-cost, and provide accurate distance measurements with a small blind zone, they ensure the accuracy of the distance information obtained by the controller, thereby guaranteeing precise control of the smoke collection components. Range hoods equipped with ultrasonic ranging devices are compatible with various common cooking appliances on the market, offering stable and reliable performance and effectively improving the user experience.

[0023] For example, the controller acquires a first ranging signal and a second ranging signal in real time, including performing the following operations: acquiring the first ranging signal and the second ranging signal at preset time intervals, wherein the preset time is greater than or equal to 250 milliseconds and less than or equal to 1500 milliseconds.

[0024] The above technical solution can ensure real-time detection of changes in cooking appliances and timely control of the smoke collection component's lifting and lowering based on the detected changes, while avoiding excessive demands on the controller's computing power, thus ensuring a low cost for the range hood.

[0025] This invention discloses a range hood control method. The range hood includes: a housing assembly, a smoke collection assembly, a driving device, a first distance measuring device, and a second distance measuring device. The smoke collection assembly is vertically connected to the housing assembly and has an air intake. The driving device is connected to the smoke collection assembly and is used to drive the smoke collection assembly to move up and down. The first distance measuring device and the second distance measuring device are vertically distributed, both mounted on the smoke collection assembly and facing forward, and are used to detect distance and generate a first distance measuring signal and a second distance measuring signal, respectively. The control method includes: acquiring the first distance measuring signal and the second distance measuring signal in real time, and controlling the driving device to drive the smoke collection assembly according to the first distance measuring signal and the second distance measuring signal, so that the upper edge of the cooking appliance corresponding to the smoke collection assembly is located between the first distance measuring device and the second distance measuring device in the vertical direction.

[0026] The above-mentioned technical solution can automatically control the smoke collection component in response to changes in cooking utensils. While ensuring the convenience of users' cooking operations, it can greatly improve the efficiency of the range hood in removing oil fumes, thereby significantly improving the user experience.

[0027] For example, the first ranging device is closer to the chassis assembly than the second ranging device. According to the first ranging signal and the second ranging signal, the driving device is controlled to drive the smoke collection assembly, including: when the distance shown by the first ranging signal and the distance shown by the second ranging signal are both less than a preset distance, the driving device is controlled to drive the smoke collection assembly to rise until the distance shown by the first ranging signal is greater than the preset distance and the driving device is controlled to stop operating.

[0028] For example, the first ranging device is closer to the chassis assembly than the second ranging device. According to the first ranging signal and the second ranging signal, the driving device is controlled to drive the smoke collection assembly, including: when the distance shown by the first ranging signal and the distance shown by the second ranging signal are both greater than a preset distance, the driving device is controlled to drive the smoke collection assembly to descend until the distance shown by the second ranging signal is less than the preset distance, and the driving device is controlled to stop operating.

[0029] For example, the first ranging device is closer to the chassis assembly than the second ranging device, and the control method further includes: when the distance indicated by the first ranging signal is less than a preset distance and the distance indicated by the second ranging signal is greater than the preset distance, an alarm operation is performed.

[0030] For example, the control method further includes: when it is determined that the range hood is turned on and / or turned off, controlling the drive device to drive the smoke collection assembly to rise to the highest position.

[0031] A series of simplified concepts are introduced in the description of the invention, which will be further explained in detail in the detailed description section. This description is not intended to limit the key features and essential technical features of the claimed technical solution, nor is it intended to determine the scope of protection of the claimed technical solution.

[0032] The advantages and features of the present invention will be described in detail below with reference to the accompanying drawings. Attached Figure Description

[0033] The following drawings, which are incorporated herein by reference and are used to understand this application, illustrate embodiments of the invention and their descriptions to explain the principles of the invention. In the drawings,

[0034] Figure 1 A schematic diagram of a range hood according to one embodiment of this application is shown;

[0035] Figure 2a and Figure 2b Side views of a range hood according to one embodiment of this application and its different working environments are shown respectively; and

[0036] Figure 3 A schematic flowchart of a range hood control method according to an embodiment of this application is shown.

[0037] The above figures include the following reference numerals:

[0038] 110. Chassis assembly; 120. Smoke collection assembly; 121. Air intake; 130. Drive unit; 141. First ranging device; 142. Second ranging device; 150. Controller. Detailed Implementation

[0039] In the following description, numerous details are provided to enable a thorough understanding of this application. However, those skilled in the art will appreciate that the following description merely illustrates preferred embodiments of the application, and that the application can be implemented without one or more of these details. Furthermore, to avoid confusion with this application, some technical features well-known in the art have not been described in detail.

[0040] As mentioned earlier, while some existing range hoods can adjust the height of their air intakes based on the cooking appliances below them when they start operating, they may struggle to adjust the intake height promptly when the appliances change. For example, in some cooking scenarios, a steamer with one or more steaming racks is needed to improve cooking efficiency. The user might first place a cooking appliance filled with water on the burner below the range hood. The range hood detects this appliance and adjusts the intake position accordingly. Then, the user might place an upper cooking appliance with a steaming rack on top of the existing appliance on the burner. Existing range hoods typically cannot detect this additional appliance, preventing the intake from automatically adjusting its height and significantly reducing its smoke extraction efficiency.

[0041] To at least partially solve the above problems, according to one aspect of the embodiments of this application, a range hood is provided. Figure 1 A schematic diagram of a range hood according to an embodiment of this application is shown. The range hood may include a housing assembly 110, a smoke collection assembly 120, a drive unit 130, a first ranging device 141, a second ranging device 142, and a controller 150.

[0042] The enclosure assembly 110 may include an enclosure housing, a fan (not shown) disposed inside the enclosure housing, and a smoke collection duct (not shown). The top of the smoke collection duct may include an air outlet, which may be located on the top of the enclosure housing. The enclosure housing may be rectangular or similar in shape. The fan may be any existing or future-developed fan. The fan may be used to generate negative pressure. The fan can be connected to the smoke collection assembly 120 via the smoke collection duct to draw oil fumes near the smoke collection assembly 120 into the smoke collection duct and discharge them through the air outlet. There may be one or more fans. If there are multiple fans, each fan may operate independently and correspond to one smoke collection duct. The smoke collection duct may include rigid pipes or flexible pipes (e.g., corrugated pipes), without specific limitations.

[0043] The smoke collection assembly 120 is vertically and flexibly connected to the chassis assembly 110. The chassis assembly 110 and the smoke collection assembly 120 can be connected via a lifting rail. Exemplarily, and not limitingly, the lifting rail can be located inside the chassis assembly 110 or on the outer side of the rear wall of the chassis housing; for example, the lifting rail can be fixedly located on the left and right sides of the rear wall of the chassis assembly 110. The smoke collection assembly 120 can move up and down along the lifting rail under the drive of the drive device 130. When the smoke collection assembly 120 gradually descends from a first position to a second position along the lifting rail, its retractable portion can extend out of the chassis assembly 110 at a certain speed and be exposed, and can be fully exposed outside the chassis assembly 110 at the lowest position. During the ascent of the smoke collection assembly 120, its retractable portion can gradually be hidden inside the chassis housing or behind the chassis assembly 110. And when the smoke collection assembly 120 is at its highest position, its retractable portion can be completely hidden inside the chassis housing or behind the chassis assembly 110.

[0044] The concealable portion of the smoke collection assembly 120 can be entirely or partially concealed. Optionally, the smoke collection assembly 120 can be completely concealed. When the smoke collection assembly 120 is in its highest position, it can be completely retracted into the smoke collection housing or the rear of the casing. This design ensures a clean and aesthetically pleasing appearance for the range hood. Furthermore, it reduces size and saves space, such as during transportation. Alternatively, the smoke collection assembly 120 can be partially concealed, for example, the portion above the air intake 121, meaning that whether this concealed portion is concealed or not has a minimal impact on the suction effect. This ensures good suction performance regardless of the smoke collection assembly 120's position, whether it is in its highest or lowest position. This not only allows for flexible height adjustment of the smoke collection assembly 120, guaranteeing the ideal suction range of the range hood, but also enhances its appearance. Partially concealing the smoke collection assembly 120 also reduces size and saves space.

[0045] The smoke collection assembly 120 may be equipped with an air intake 121. When the fan is operating, the fumes near the air intake 121 can be drawn into the air intake 121 and then discharged through the smoke collection duct. The shape and number of air intakes 121 can be any shape and are not specifically limited. Optionally, there may be multiple air intakes 121, each corresponding to a burner head located below it. When there are multiple air intakes 121, each air intake 121 can also be connected to a corresponding fan through a smoke collection duct to achieve independent control of the fan and adsorption of nearby fumes. Alternatively, there may be multiple air intakes 121 and one fan; the fumes drawn in from the multiple air intakes 121 can be drawn to the fan through a single smoke collection duct and discharged through the air outlet. Each air intake 121 may also be equipped with an automatically opening and closing guide plate to achieve independent control of the opening and closing of each air intake 121.

[0046] The air intake 121 of the smoke collection assembly 120 can be located on the side of the bottom of the smoke collection assembly 120. This allows the air intake 121 to extend beyond the casing and be exposed when the smoke collection assembly 120 begins to descend. Furthermore, the air intake 121 of the smoke collection assembly 120 can be connected to the smoke collection duct during both rising and falling. Therefore, with this configuration, the height of the air intake 121 can be adjusted by changing the position of the smoke collection assembly 120, thus placing the air intake 121 in a more favorable position for absorbing cooking fumes.

[0047] The drive unit 130 can be connected to the smoke collection assembly 120 and is used to drive the smoke collection assembly 120 to rise and fall within a liftable range. For example, the drive unit 130 includes a motor and a connecting rod. The drive unit 130 can be connected to the smoke collection assembly 120 via the connecting rod. The connecting rod can include a hydraulic push rod or a pneumatic push rod, etc. The drive unit 130 can be controlled by a controller 150, for example, the controller 150 controls the operation of its motor.

[0048] The first ranging device 141 and the second ranging device 142 can be disposed on the smoke collection assembly 120, below the air intake 121 and facing forward, to detect the distance in front and generate a first ranging signal and a second ranging signal. The first ranging device 141 and the second ranging device 142 can include any suitable ranging sensor, such as an infrared pyroelectric sensor, an ultrasonic sensor, a radar sensor, etc. The first ranging device 141 and the second ranging device 142 are arranged in pairs, either one pair or multiple pairs, depending on actual needs. For example, on a range hood used with a single-burner cooktop, only the first ranging device 141 and the second ranging device 142 may be installed. The first ranging device 141 and the second ranging device 142 can be disposed in front of the smoke collection assembly 120, for example, on the outer side of the front wall of the smoke collection assembly 120. This can, to a certain extent, avoid damage and contamination of the ranging devices by water vapor and oil fumes during cooking, ensuring the reliability and service life of the range hood. Of course, the first ranging device 141 and the second ranging device 142 can also be set in other suitable positions. The first ranging device 141 and the second ranging device 142 face forward, for example, the measuring probe faces forward, so as to detect the distance information of the object closest to the probe in front of them. For example, the distance information of the cooking utensils in front of the first ranging device 141 and the second ranging device 142 can be detected.

[0049] The controller 150 can be connected to the first ranging device 141, the second ranging device 142, and the drive device 130 respectively. The controller 150 can be used to acquire the first ranging signal and the second ranging signal generated by the first ranging device 141 and the second ranging device 142 in real time, and control the drive device 130 to drive the lifting and lowering of the smoke collection assembly 120 in real time based on the first ranging signal and the second ranging signal, so that the upper edge of the cooking appliance corresponding to the smoke collection assembly 120 is located between the first ranging device 141 and the second ranging device 142 in the vertical direction.

[0050] For example, the controller 150 can acquire the first ranging signal and the second ranging signal currently generated by the first ranging device 141 and the second ranging device 142 in real time at a preset frequency. This preset frequency is, for example, once every 10 milliseconds to 1 second.

[0051] It is easy to understand that the first ranging device 141 and the second ranging device 142 can detect the nearest object in front of them in real time and obtain the distance information to that object. The first ranging device 141 and the second ranging device 142 can be set in the area corresponding to the burner head on the smoke collection assembly 120. Figure 1As shown, it can be set on the smoke collection assembly 120 at a position aligned with the center of the burner head. Thus, the first distance measuring device 141, the second distance measuring device 142, and the center of the burner head are located in the same vertical plane. The presence of a cooking appliance on the burner head can be determined based on the distance information detected by the first distance measuring device 141 and the second distance measuring device 142. Figure 2a and Figure 2b Side views of a range hood according to one embodiment of this application and its different working environments are shown. Figure 2a This indicates that there are cooking appliances on the burner head below the range hood. Figure 2b This indicates that there are no cooking appliances on the burner head below the range hood. Taking the second ranging device 142 as an example, when there is a cooking appliance in front of the second ranging device 142, it can detect the distance d1 from the second ranging device 142 to the cooking appliance. When there is no cooking appliance in front of it, it detects the distance d2 between the second ranging device 142 and a more distant object in front of it. In this case, the more distant object may be the body of a user cooking or a kitchen wall, etc. It can be understood that d1 is less than d2. Therefore, the presence of cooking appliances at the detection height corresponding to the ranging device can be determined based on the distance detected by the ranging device.

[0052] According to an embodiment of this application, the controller 150 can compare the distance currently detected by the first ranging device 141 and the second ranging device 142 with a preset distance to determine whether there is a cooking appliance at the corresponding detection height of the first ranging device 141 and the second ranging device 142. Since the air intake 121, the first ranging device 141 and the second ranging device 142 are all set on the smoke collection assembly 120, their positions are relatively fixed. Based on the determination result regarding whether there is a cooking appliance at the corresponding detection height of the first ranging device 141 and the second ranging device 142, it can be determined whether the height of the air intake 121 on the smoke collection assembly 120 matches the height of the cooking appliance. When the upper edge of the cooking appliance is higher than the second ranging device 142 and lower than the first ranging device 141, the height of the air intake 121 of the smoke collection assembly 120 is the optimal smoke exhaust height. Since the upper edge of the cooking appliance is located between the first ranging device 141 and the second ranging device 142, any change in the height of the cooking appliance can be detected accurately and promptly by both devices. The controller 150 can then control the drive device 130 to raise and lower the smoke collection assembly 120 accordingly. For example, during steaming, if a steaming rack is added to the top layer of the steamer, the first ranging device 141 will detect that the distance indicated by its first ranging signal changes from greater than a preset distance to less than a preset distance. At this time, the drive device 130 can be controlled to raise the smoke collection assembly 120 to the optimal smoke exhaust height corresponding to the current cooking appliance. Similarly, during steaming, if a steaming rack is removed from the top layer of the steamer or the entire steamer is removed, the second ranging device 142 will detect that the distance indicated by its second ranging signal changes from less than a preset distance to greater than a preset distance. At this time, the drive device 130 can be controlled to lower the smoke collection assembly 120 to the optimal smoke exhaust height corresponding to the current cooking appliance or its lowest possible position.

[0053] The preset distance can be a value stored in the controller 150 at the factory, or a value input by the user or installer during on-site debugging based on actual conditions, or an analog quantity input via a potentiometer, etc. The preset distance can be determined based on the distance between the first distance measuring device 141, the second distance measuring device 142, and the cooking appliance when the cooking appliance is normally placed on the stove. Specifically, for example, the preset distance can be any value between 10 and 20 centimeters.

[0054] The controller 150 can control the drive device 130 in various suitable ways. For example, a high-level signal can be used to control the drive device 130 to drive the smoke collection assembly 120 to rise, and a low-level signal can be used to control the drive device 130 to drive the smoke collection assembly 120 to fall. The single-cycle lifting and lowering height of the smoke collection assembly 120 can also be controlled by controlling the single-cycle energization time of the drive device 130. Of course, the controller 150 can also control the drive device 130 to drive the smoke collection assembly 120 to rise or fall in other suitable ways.

[0055] The distance between the first ranging device 141 and the second ranging device 142 can be 3-5 cm. Maintaining a certain distance avoids overlap in their detection ranges, preventing distortion in the determination of the position of the upper edge of the cooking appliance and affecting the control results of the smoke collection assembly 120. If the distance exceeds 5 cm, a vacuum ranging position exists between them. This results in insensitivity to changes in the state of the cooking appliance, making it impossible to accurately control the smoke collection assembly 120 based on these changes. For example, during steaming, if a steaming rack is added to the top of the steamer, and the height of the rack is less than the distance between the first ranging device 141 and the second ranging device 142, the existence of this vacuum ranging position means that although a cooking appliance has been added, the first ranging device 141 will not detect it. Consequently, the controller 150 cannot promptly control the smoke collection assembly 120 to reach the optimal smoke exhaust position based on the ranging results.

[0056] The distance between the first ranging device 141 and the second ranging device 142 is set within the range of 3-5cm. This reduces the probability of the controller 150 misjudging the position of the upper edge of the cooking appliance, and also accommodates most cooking appliances on the market, allowing for a more accurate determination of the current height of the cooking appliance. This ensures that the smoke collection assembly 120 is always kept in the optimal smoke collection position in real time, thereby guaranteeing the smoke extraction effect of the range hood.

[0057] It should be noted that the directional terms used in this application, such as "up," "down," "front," "back," "left," "right," and "vertical," are all relative to the user when the range hood is in use.

[0058] Because the first and second ranging devices 141 and 142, which rise and fall synchronously with the smoke collection assembly 120, can acquire real-time distance information in front of it, they can accurately detect the state of the cooking utensils in front of it, thereby enabling precise control of the rise and fall of the smoke collection assembly 120 within the suction range. In particular, any changes in the cooking utensils during the cooking process can be sensitively detected by the first and second ranging devices 141 and 142, allowing for adaptive and automatic control of the smoke collection assembly 120 in response to these changes. Therefore, while ensuring the convenience of user cooking operations, the efficiency of the range hood in removing cooking fumes can be greatly improved, thus significantly enhancing the user experience.

[0059] For example, the controller 150 acquires the first ranging signal and the second ranging signal in real time, including performing the following operations: acquiring the first ranging signal and the second ranging signal at preset time intervals, wherein the preset time is greater than or equal to 250 milliseconds and less than or equal to 1500 milliseconds. In other words, the preset time can be any value between 250 milliseconds and 1500 milliseconds. For example, the preset time can be 500 milliseconds. That is, the controller 150 acquires the first ranging signal and the second ranging signal every 500 milliseconds. If the preset time is too short, it will significantly increase the consumption of the controller 150's computing resources. If the preset time is too long, it will be difficult to respond promptly to changes in the cooking appliances under the range hood. Relative to the user's frequency of operation on the cooking appliances, acquiring the ranging signal at the above frequency can ensure real-time performance without incurring too much computational burden.

[0060] The above technical solution can ensure real-time detection of changes in cooking appliances and timely control of the smoke collection component 120 to rise and fall based on the detected changes, while avoiding excessive requirements on the computing power of the controller 150, thus ensuring a low cost for the range hood.

[0061] For example, when the range hood is determined to be turned on, the controller 150 can control the smoke collection assembly 120 to automatically rise to its highest position. Optionally, the range hood includes an input device, and the controller 150 can be connected to the input device. For example, the input device is a push-button switch, and the controller 150 can determine that the range hood is turned on in response to the user's pressing operation of the push-button switch. Alternatively, the controller 150 can also determine the desired start-up time in response to the user's setting operation of the input device, such as 12 noon every day. When the user's desired start-up time is reached, the range hood can be determined to be turned on. Controlling the smoke collection assembly 120 to rise to its highest position when it is turned on is equivalent to performing an initialization operation on the smoke collection assembly 120. In a specific embodiment, the drive device 130 includes a stepper motor without position feedback, and the height of the smoke collection assembly 120 can be controlled by controlling the number of steps the stepper motor takes. When the range hood runs for a long time or a sudden power outage occurs, the movement position of the smoke collection assembly 120 may be inaccurate. The position of the smoke collection component 120 can be calibrated by raising it to its highest position each time the range hood is turned on. It's understood that if the smoke collection component 120 is already in its highest position when the range hood is turned off, this process is invisible to the user. Controlling the smoke collection component 120 to its highest position upon startup ensures accurate control of the range hood during operation, improves its reliability, and simplifies the control logic.

[0062] Similarly, when the range hood is turned off, the controller 150 can control the drive device 130 to automatically raise the smoke collection assembly 120 to its highest position. At this time, the retractable portion of the smoke collection assembly 120 can gradually be hidden inside the casing or behind the casing assembly 110. Exemplarily, the range hood may include an input device, to which the controller 150 can be connected. For example, the input device is a push-button switch, and the controller 150 can determine that the range hood is turned off in response to a user pressing the push-button switch. Alternatively, the controller 150 can also start a timer, for example, for 2 hours, in response to a user setting operation on the input device. When the time reaches the user's desired time, the range hood can be turned off. After the range hood is turned off, the controller 150 can directly control the drive device 130 to raise the smoke collection assembly 120 to its highest position. This provides maximum space for the user when the range hood is not in use. It also prevents the smoke collection assembly 120 from being exposed and subjected to unnecessary pollution when the range hood is not turned on, thus avoiding aesthetic issues. Furthermore, rising to the highest position can also prevent accidental collisions from causing damage to people and machinery.

[0063] As previously described, the controller 150 can be used to control the drive device 130 to drive the smoke collection assembly 120 based on the first ranging signal and the second ranging signal. Exemplarily, the first ranging device 141 is closer to the chassis assembly 110 than the second ranging device 142. In other words, the first ranging device 141 is located above the second ranging device 142. The controller 150 achieves the above functions by performing the following operations.

[0064] When the distance indicated by the first ranging signal generated by the first ranging device 141 and the distance indicated by the second ranging signal generated by the second ranging device 142 are both less than the preset distance, the control drive device 130 drives the smoke collection assembly 120 to rise until the distance indicated by the first ranging signal is greater than the preset distance, at which point the control drive device 130 stops operating.

[0065] When the distance indicated by the ranging signal generated by any ranging device is less than a preset distance, it can be determined that a cooking appliance exists at the corresponding height in front of that ranging device. When the height of the smoke collection assembly 120 relative to the cooking appliance is too low, the distances indicated by the first ranging signal and the second ranging signal are both less than the preset distance. At this time, it can be determined that cooking appliances exist at the corresponding height in front of both the first ranging device 141 and the second ranging device 142. Therefore, the driving device 130 can be controlled to drive the smoke collection assembly 120 to rise. When the distance indicated by the first ranging signal is greater than the preset distance, there is no cooking appliance at the corresponding height in front of the first ranging device 141, that is, the height of the first ranging device 141 is higher than the height of the upper edge of the cooking appliance, while there is a cooking appliance at the corresponding height in front of the second ranging device 142.

[0066] The above-described technical solution not only ensures that the upper edge of the cooking appliance is positioned between the first ranging device 141 and the second ranging device 142 in terms of height, thereby guaranteeing the smoke extraction effect of the range hood; it is also logically simple, easy to implement, and less prone to errors. Furthermore, when the height of the cooking appliance increases, for example, when a new pot is added to the top of the cooking appliance, the smoke collection component 120 can be controlled to rise promptly and accurately, improving the user experience.

[0067] When the distance indicated by the first ranging signal generated by the first ranging device 141 and the distance indicated by the second ranging signal generated by the second ranging device 142 are both greater than the preset distance, the control drive device 130 drives the smoke collection assembly 120 to descend until the distance indicated by the second ranging signal is less than the preset distance, at which point the control drive device 130 stops operating.

[0068] As mentioned earlier, when the distance indicated by the distance measurement signal generated by any distance measuring device is greater than the preset distance, it can be determined that there are no cooking utensils at the corresponding height in front of the distance measuring device, and it directly measures the distance between the user's body or the wall and the device.

[0069] When both the distance indicated by the first ranging signal and the distance indicated by the second ranging signal are greater than a preset distance, it can be determined that there are no cooking appliances at the corresponding height in front of the first ranging device 141 and the second ranging device 142. In other words, the cooking appliances are lower than the two ranging devices. Therefore, the drive device 130 can be controlled to drive the smoke collection assembly 120 to descend. When the distance indicated by the second ranging signal is less than the preset distance, a cooking appliance appears at the corresponding height in front of the second ranging device 142, that is, the height of the second ranging device 142 is lower than the height of the upper edge of the cooking appliance, while there are no cooking appliances at the corresponding height in front of the first ranging device 141.

[0070] The above-mentioned technical solution not only ensures that the upper edge of the cooking appliance is positioned between the first ranging device 141 and the second ranging device 142 in terms of height, thereby guaranteeing the smoke extraction effect of the range hood; but also features simple logic, easy implementation, and low error rate. Furthermore, when the height of the cooking appliance is lowered, for example, when part of the pot is removed from the top of the appliance, the smoke collection component 120 can be controlled to descend in a timely and accurate manner, improving the user experience.

[0071] For example, the range hood also includes an output device. When the distance information indicated by the first ranging signal is less than a preset distance and the distance information indicated by the second ranging signal is greater than the preset distance, the controller 150 can control the output device to alarm. It is understood that the cooking appliance is placed on the burner below the range hood. The cooking appliance will not be suspended in mid-air. Under normal use of the range hood, there will be no situation where the first ranging device 141 located above detects the cooking appliance, while the second ranging device 142 located below does not. This result may occur due to various problems, such as: 1) when the range hood is working, oil stains may contaminate the ranging devices, causing inaccurate ranging results; 2) one or both of the first ranging device 141 and the second ranging device 142 are damaged; 3) the controller 150 malfunctions. In this case, the range hood cannot accurately control the lifting position of the smoke collection assembly 120 based on the ranging results of the first ranging device 141 and the second ranging device 142, and the controller 150 can control the output device to alarm.

[0072] To minimize false alarms, according to a preferred embodiment of this application, the output device can be controlled to issue an alarm only after multiple consecutive occurrences of the distance information shown by the first ranging signal being less than a preset distance and the distance information shown by the second ranging signal being greater than a preset distance.

[0073] In the above technical solution, when the ranging signals generated by the first ranging device 141 and the second ranging device 142 are difficult to accurately reflect the height of the cooking appliance, an alarm message is output. This can help users to promptly learn about and adjust the abnormal operation of the range hood, and avoid the range hood from working in an abnormal state for a long time.

[0074] According to one embodiment of this application, a range hood can support the exhaust of smoke from a cooktop with multiple burners. The range hood may include multiple smoke collection components 120, each of which is independently equipped with an air intake 121, a first ranging device 141, and a second ranging device 142. Each smoke collection component 120 may be configured with an independent drive device 130. In other words, the range hood includes the same number of drive devices 130 as the number of smoke collection components 120, and each drive device 130 corresponds one-to-one with a smoke collection component 120.

[0075] In the above technical solution, the range hood includes multiple smoke collection components 120 and corresponding drive devices 130. This allows for independent control of the smoke collection component 120 for each burner at the optimal smoke exhaust height, achieving the best smoke exhaust effect, and also simplifies the control logic of the smoke collection component 120.

[0076] Refer again Figure 1 The center point of the horizontal projection of the first ranging device 141 and the second ranging device 142 can be located on the longitudinal central axis of the horizontal projection of the burner head. That is, in the left-right direction, the first ranging device 141 and the second ranging device 142 can be set directly behind the burner head. It is easy to understand that when a cooking appliance is placed above the burner head, the center of the cooking appliance is usually near the center of the burner head. The cooking appliance usually has a circular cross-section. Thus, the distance measured by the first ranging device 141 and the second ranging device 142 is the distance between the rearmost part of the cooking appliance and the appliance, that is, the minimum distance to the cooking appliance. Even if there is some error in the distance measurement of the first ranging device 141 and the second ranging device 142, it can be accurately detected as long as there is a cooking appliance on the burner head. In addition, when the cooking appliance in front of the first ranging device 141 and the second ranging device 142 is small, setting the first ranging device 141 and the second ranging device 142 directly behind the burner head area can avoid the situation where the cooking appliance cannot be detected.

[0077] According to the above solution, by placing the first ranging device 141 and the second ranging device 142 near the center and directly behind the burner head, the presence of cooking appliances can be effectively and accurately detected, avoiding detection errors. This allows the smoke collection assembly 120 to be raised or lowered to the most suitable height. Furthermore, this enables efficient use of the range hood while facilitating user cooking operations.

[0078] For example, the first ranging device 141 and the second ranging device 142 can be infrared ranging devices, which measure distance based on the reflection of infrared light. Infrared ranging devices are low-cost, technologically mature, and can accurately measure the distance between cooking appliances and range hoods in most application scenarios. When the user uses a transparent cooking appliance, such as one made of glass, the infrared light may not be reflected at the appliance, which could lead to measurement errors. This could cause problems with the range hood's control over the smoke collection assembly 120.

[0079] For example, the first ranging device 141 and the second ranging device 142 can be ultrasonic ranging devices. Ultrasonic ranging devices can generate ultrasonic waves. Since the speed of ultrasonic waves in air is known, the actual distance from the ultrasonic ranging device to the object in front can be calculated based on the difference between the time the ultrasonic wave is emitted and the time it takes to be received after being reflected back from an obstacle. In embodiments of this application, the object in front is a cooking appliance, a human body, or a wall, etc.

[0080] Because ultrasonic ranging devices are stable, low-cost, and provide accurate distance measurements with a small blind zone, they ensure the accuracy of the distance information obtained by the controller 150, thereby guaranteeing the controller 150's precise control over the smoke collection assembly 120. Range hoods equipped with ultrasonic ranging devices are compatible with various common cooking appliances on the market, offering stability and reliability, and effectively improving the user experience.

[0081] According to another aspect of this application, a control method applicable to the aforementioned range hood is also disclosed. As previously described, the range hood includes a smoke collection assembly 120, a drive device 130, a first ranging device 141, and a second ranging device 142. The control method includes: acquiring in real time a first ranging signal generated by the first ranging device 141 and a second ranging signal generated by the second ranging device 142. For example, the first ranging signal and the second ranging signal currently generated by the first ranging device 141 and the second ranging device 142 can be acquired every 250ms or every 500ms. Detection at the aforementioned frequency ensures real-time performance relative to the user's operating speed on the cooking appliance without incurring a significant computational burden. Subsequently, based on the first ranging signal and the second ranging signal, the drive device 130 can be controlled to drive the smoke collection assembly 120 to rise or fall, so that the upper edge of the cooking appliance corresponding to the smoke collection assembly 120 is vertically positioned between the first ranging device 141 and the second ranging device 142. The positions of the first ranging device 141, the second ranging device 142, and the air intake 121 on the smoke collection assembly 120 are relatively fixed. The upper edge of the cooking appliance corresponding to the smoke collection assembly 120 is located between the first ranging device 141 and the second ranging device 142 in the vertical direction, so that the air intake 121 is at the optimal smoke exhaust height.

[0082] For example, the first ranging device 141 is closer to the chassis assembly 110 than the second ranging device 142. In other words, the first ranging device 141 is above the second ranging device 142.

[0083] The aforementioned control of the drive device 130 to drive the smoke collection assembly 120 based on the first and second ranging signals may include: when both the distances indicated by the first and second ranging signals are less than a preset distance, controlling the drive device 130 to drive the smoke collection assembly 120 to rise, until the distance indicated by the first ranging signal is greater than the preset distance, at which point the drive device 130 stops operating, i.e., the smoke collection assembly 120 stops rising. In other words, when the height of the smoke collection assembly 120 relative to the cooking appliance is too low, the height of the smoke collection assembly 120 is raised, thereby placing the air intake 121 in a suitable position.

[0084] The aforementioned control of the drive device 130 to drive the smoke collection assembly 120 based on the first and second ranging signals may further include: when both the distance indicated by the first and second ranging signals are greater than a preset distance, controlling the drive device 130 to drive the smoke collection assembly 120 to descend until the distance indicated by the second ranging signal is less than the preset distance, then controlling the drive device 130 to stop operating, i.e., the smoke collection assembly 120 stops descending. In other words, when the height of the smoke collection assembly 120 relative to the cooking appliance is too high, the height of the smoke collection assembly 120 is lowered, thereby placing the air intake 121 in a suitable position.

[0085] For example, the first ranging device 141 is closer to the chassis assembly 110 than the second ranging device 142. The control method described above may further include: performing an alarm operation when the distance indicated by the first ranging signal is less than a preset distance and the distance indicated by the second ranging signal is greater than the preset distance.

[0086] For example, the above control method may further include: when it is determined that the range hood is turned on and / or turned off, the control drive device 130 drives the smoke collection assembly 120 to rise to the highest position.

[0087] Figure 3 A schematic flowchart of a range hood control method according to one embodiment of this application is shown. In this range hood, a first ranging device 141 is closer to the chassis assembly 110 than a second ranging device 142. Figure 3As shown, after the range hood is turned on, the first ranging device 141, the second ranging device 142, and the controller 150 can be activated. The controller 150 first controls the drive device 130 to drive the smoke collection assembly 120 to its highest position. Then, it can read the first ranging signal generated by the first ranging device 141 and the second ranging signal generated by the second ranging device 142 in real time to determine the corresponding distance information. For ease of description, the distances indicated by the first and second ranging signals are represented as Ls and Lx, respectively, and the preset distance is represented as L0. The controller 150 can acquire the first and second ranging signals at preset time intervals. Specifically, the controller 150 can start a timer to count when the smoke collection assembly 120 reaches its highest position, and the counted time is represented as T. Every preset time T accumulates, for example, 500 milliseconds, the controller acquires the first and second ranging signals, resets the timer to zero, and restarts the counting process, thereby realizing the real-time reading function described above. According to Ls and Lx, the control drive device 130 drives the smoke collection assembly 120 so that the upper edge of the cooking appliance corresponding to the smoke collection assembly 120 is located between the first distance measuring device 141 and the second distance measuring device 142 in the vertical direction.

[0088] For example, the control method further includes performing an alarm operation when the distance indicated by the first ranging signal is less than a preset distance and the distance indicated by the second ranging signal is greater than the preset distance. Figure 3 As shown, if Lx > L0 and Ls < L0, it indicates an abnormal state of the range hood, and the controller 150 can control the output device to issue an error alarm. If Lx > L0 and Ls ≥ L0, the controller 150 can control the drive device 130 to drive the smoke collection assembly 120 to descend. Optionally, if Lx > L0 and Ls ≥ L0, and the smoke collection assembly 120 is at its lowest position, then the drive device 130 can be controlled to stop operating. If Lx < L0 and Ls ≤ L0, the controller 150 can control the drive device 130 to drive the smoke collection assembly 120 to rise. Optionally, if Lx < L0 and Ls ≥ L0, and the smoke collection assembly 120 is at its highest position, then the drive device 130 can be controlled to stop operating. If Lx < L0 and Ls > L0, the controller 150 can control the drive device 130 to stop operating.

[0089] It is understood that the range hood can be turned off at any point during its operation, for example, upon receiving a user's shutdown instruction signal. At this time, the controller 150 can control the drive unit 130 to drive the smoke collection assembly 120 to its highest position, regardless of the arbitrary values ​​of Lx and Ls. This shutdown process occurs within... Figure 3 Not shown in the image.

[0090] Those skilled in the art can understand the various steps and technical effects of the range hood control method by reading the above description of the range hood. For the sake of brevity, they will not be elaborated further here.

[0091] For ease of description, spatial relative terms such as "above," "over," "on the upper surface of," and "above" are used herein to describe the spatial positional relationship between one or more components or features shown in the figures and other components or features. It should be understood that spatial relative terms include not only the orientation of the component as depicted in the figures but also different orientations during use or operation. For example, if the components in the figures are inverted as a whole, "above" or "above other components or features" will include cases where the component is "below" or "under" other components or features. Thus, the exemplary term "above" can include both "above" and "below." Furthermore, these components or features may also be positioned at other different angles (e.g., rotated 90 degrees or other angles), and this document intends to include all such cases.

[0092] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, parts, components, and / or combinations thereof.

[0093] It should be noted that the terms "first," "second," etc., used in the specification, claims, and accompanying drawings of this application 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 sequences other than those illustrated or described herein.

[0094] The present invention has been described through the above embodiments. However, it should be understood that the above embodiments are for illustrative purposes only and are not intended to limit the invention to the scope of the described embodiments. Furthermore, those skilled in the art will understand that the present invention is not limited to the above embodiments, and many more variations and modifications can be made based on the teachings of the present invention, all of which fall within the scope of protection claimed by the present invention. The scope of protection of the present invention is defined by the appended claims and their equivalents.

Claims

1. A range hood, characterized in that, It includes a chassis assembly, a smoke collection assembly, a drive unit, a first ranging device, a second ranging device, and a controller, wherein, The smoke collection assembly is vertically and vertically connected to the chassis assembly, and the smoke collection assembly is provided with an air intake. The driving device is connected to the smoke collection assembly and is used to drive the smoke collection assembly to rise and fall. The first ranging device and the second ranging device are distributed vertically, both mounted on the smoke collection assembly and facing forward, and are used to detect distance and generate a first ranging signal and a second ranging signal respectively. The controller is connected to the drive device, the first ranging device, and the second ranging device. It is used to acquire the first ranging signal and the second ranging signal in real time, and control the drive device to drive the smoke collection assembly according to the first ranging signal and the second ranging signal, so that the upper edge of the cooking appliance corresponding to the smoke collection assembly is located between the first ranging device and the second ranging device in the vertical direction.

2. The range hood as described in claim 1, characterized in that, The first ranging device is closer to the chassis assembly than the second ranging device. The controller controls the driving device to drive the smoke collection assembly based on the first ranging signal and the second ranging signal, including performing the following operations: When both the distance indicated by the first ranging signal and the distance indicated by the second ranging signal are less than a preset distance, the driving device is controlled to drive the smoke collection component to rise until the distance indicated by the first ranging signal is greater than the preset distance, at which point the driving device is controlled to stop operating.

3. The range hood as described in claim 1, characterized in that, The first ranging device is closer to the chassis assembly than the second ranging device. The controller controls the driving device to drive the smoke collection assembly based on the first ranging signal and the second ranging signal, including performing the following operations: When both the distance indicated by the first ranging signal and the distance indicated by the second ranging signal are greater than a preset distance, the driving device is controlled to drive the smoke collection assembly to descend until the distance indicated by the second ranging signal is less than the preset distance, at which point the driving device is controlled to stop operating.

4. The range hood as described in any one of claims 1-3, characterized in that, The first ranging device is closer to the chassis assembly than the second ranging device, and the range hood also includes an output device. The controller is also configured to control the output device to sound an alarm when the distance indicated by the first ranging signal is less than a preset distance and the distance indicated by the second ranging signal is greater than the preset distance.

5. The range hood as described in any one of claims 1-3, characterized in that, The controller is also used to control the drive device to drive the smoke collection assembly to the highest position when it is determined that the range hood is turned on and / or turned off.

6. The range hood as described in any one of claims 1-3, characterized in that, There are multiple driving devices, and the number of smoke collection components is the same as the number of driving devices. Each driving device drives a smoke collection component one-to-one, and each smoke collection component is equipped with a first ranging device and a second ranging device.

7. The range hood as described in any one of claims 1-3, characterized in that, The center point of the horizontal projection of the first ranging device and the second ranging device is located on the longitudinal central axis of the horizontal projection of the furnace head.

8. The range hood as described in any one of claims 1-3, characterized in that, The distance between the first ranging device and the second ranging device is 3 to 5 centimeters.

9. The range hood as described in any one of claims 1-3, characterized in that, The first ranging device and the second ranging device are ultrasonic ranging devices.

10. The range hood as described in any one of claims 1-3, characterized in that, The controller acquires the first ranging signal and the second ranging signal in real time, including performing the following operations: The first ranging signal and the second ranging signal are acquired at preset time intervals, wherein the preset time is greater than or equal to 250 milliseconds and less than or equal to 1500 milliseconds.

11. A method for controlling a range hood, characterized in that, The range hood includes: a casing assembly, a smoke collection assembly, a drive device, a first distance measuring device, and a second distance measuring device. The smoke collection assembly is vertically and flexibly connected to the casing assembly and has an air intake. The drive device is connected to the smoke collection assembly and drives it to move up and down. The first and second distance measuring devices are vertically distributed, both mounted on the smoke collection assembly and facing forward, and are used to detect distance and generate a first distance measuring signal and a second distance measuring signal, respectively. The control method includes: acquiring the first ranging signal and the second ranging signal in real time, and controlling the driving device to drive the smoke collection assembly according to the first ranging signal and the second ranging signal, so that the upper edge of the cooking appliance corresponding to the smoke collection assembly is located between the first ranging device and the second ranging device in the vertical direction.

12. The control method as described in claim 11, characterized in that, The first ranging device is closer to the chassis assembly than the second ranging device. The step of controlling the driving device to drive the smoke collection assembly based on the first ranging signal and the second ranging signal includes: When both the distance indicated by the first ranging signal and the distance indicated by the second ranging signal are less than a preset distance, the driving device is controlled to drive the smoke collection component to rise until the distance indicated by the first ranging signal is greater than the preset distance, at which point the driving device is controlled to stop operating.

13. The control method as described in claim 11, characterized in that, The first ranging device is closer to the chassis assembly than the second ranging device. The step of controlling the driving device to drive the smoke collection assembly based on the first ranging signal and the second ranging signal includes: When both the distance indicated by the first ranging signal and the distance indicated by the second ranging signal are greater than a preset distance, the driving device is controlled to drive the smoke collection assembly to descend until the distance indicated by the second ranging signal is less than the preset distance, at which point the driving device is controlled to stop operating.

14. The control method according to any one of claims 11 to 13, characterized in that, The first ranging device is closer to the chassis assembly than the second ranging device, and the control method further includes: An alarm operation is executed when the distance indicated by the first ranging signal is less than the preset distance and the distance indicated by the second ranging signal is greater than the preset distance.

15. The control method according to any one of claims 11 to 13, characterized in that, The control method further includes: When the range hood is turned on and / or turned off, the drive device is controlled to drive the smoke collection assembly to rise to the highest position.

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