Control method and control device for a range hood

Abstract

The application relates to a control method and a control device of an oil fume exhauster, which are applied to the oil fume exhauster. Sensors and reflecting devices are arranged at intervals on the oil fume exhauster. The sensors comprise signal emitting parts and signal receiving parts. The method comprises the following steps: continuously emitting detection signals by the signal emitting parts and continuously changing the signal emitting directions of the detection signals, receiving, by the signal receiving parts, first detection signals reflected by a user's palm in a first detection area and second detection signals reflected by the user's palm in a second detection area; determining a control action of the user according to the emitting time of the detection signals emitted by the signal emitting parts in a target signal emitting direction and the time information of the first detection signals and the second detection signals received by the signal receiving parts respectively; determining a control instruction of the oil fume exhauster according to the current working state of the oil fume exhauster and the control action of the user, and controlling the oil fume exhauster according to the control instruction. Thus, the oil fume exhauster can be prevented from being contaminated when the oil fume exhauster is controlled by the hand sticking to stains.

Description

Technical Field

[0001] This application relates to the field of range hood control technology, and in particular to a control method and control device for a range hood. Background Technology

[0002] Currently, range hoods are installed in the kitchen for users to use when cooking.

[0003] However, users often get their hands dirty while cooking. If they use their dirty hands to operate the range hood buttons, it will make the surface of the range hood dirty. Summary of the Invention

[0004] This application addresses the shortcomings of existing methods by providing a control method and device for a range hood, thereby solving the technical problem of soiling the surface of the range hood when operated with stained hands.

[0005] In a first aspect, embodiments of this application provide a control method for a range hood, applied to a range hood, wherein sensors and reflective devices are spaced apart on the range hood, and the sensors include a signal transmitter and a signal receiver. The method includes: controlling the signal transmitter to continuously transmit detection signals and continuously changing the signal transmission direction of the detection signals; the signal receiver receiving a first detection signal reflected by a user's palm in a first detection area and a second detection signal reflected by the user's palm in a second detection area, wherein the second detection signal is a detection signal reflected by the reflective device after receiving the detection signal reflected by the user's palm in the second detection area; the first detection area and the second detection area do not overlap; determining a user control action based on the transmission time of the detection signal transmitted by the signal transmitter in the target signal transmission direction and the time information of the first detection signal and the second detection signal received by the signal receiver respectively; determining a control command for the range hood based on the current working state of the range hood and the user control action, and controlling the range hood according to the control command.

[0006] As an optional implementation, controlling the signal transmitting unit to continuously transmit detection signals and continuously change the direction of the transmitted detection signals includes: during the continuous transmission of detection signals by the signal transmitting unit, controlling the signal transmitting unit to rotate by a preset angle along the direction closer to the reflector, so as to change the signal transmission direction of the signal transmitting unit from a first signal transmission direction to a second signal transmission direction; the first signal transmission direction and the second signal transmission direction intersect.

[0007] As an optional implementation, the step of controlling the signal transmitting unit to continuously transmit a detection signal and continuously change the direction of the transmitted detection signal further includes: after controlling the signal transmitting unit to rotate a preset angle in a direction close to the reflector, controlling the signal transmitting unit to rotate the preset angle in a direction away from the reflector, so as to change the signal transmission direction of the signal transmitting unit from the second signal transmission direction to the first signal transmission direction.

[0008] As an optional implementation, the target signal transmission direction is a first signal transmission direction, and the time information includes the start time and end time of reception. The step of determining whether the user is performing a control action based on the transmission time of the detection signal transmitted by the signal transmitter in the target signal transmission direction and the time information of the first and second detection signals received by the signal receiver includes: if the time difference between the start time of the first detection signal received by the signal receiver and the transmission time of the detection signal transmitted by the signal transmitter in the first signal transmission direction is within a first preset time difference threshold, and the time difference between the end time of the first detection signal received by the signal receiver and the start time of reception is within a second preset time difference threshold, and the time difference between the end time of the second detection signal received by the signal receiver and the start time of reception is within a third preset time difference threshold, then it is determined that the user is performing a control action; the first preset time difference threshold is equal to the third preset time difference threshold, and neither is greater than the second preset time difference threshold.

[0009] In one optional implementation, the target signal transmission direction is a second signal transmission direction, and the time information includes the start time and end time of reception. The step of determining a user's control action based on the transmission time of the detection signal transmitted by the signal transmitter in the target signal transmission direction and the time information of the first and second detection signals received by the signal receiver includes: if the time difference between the start time of the second detection signal received by the signal receiver and the transmission time of the detection signal transmitted by the signal transmitter in the second signal transmission direction is within a fourth preset time difference threshold, then the time difference between the end time and the start time of the second detection signal received by the signal receiver is within a fifth preset time difference threshold, and the time difference between the end time and the start time of the first detection signal received by the signal receiver is within a sixth preset time difference threshold, then it is determined that the user is performing a control action; the fourth preset time difference threshold is equal to the sixth preset time difference threshold, and neither is greater than the fifth preset time difference threshold.

[0010] As an optional implementation, determining the control command of the range hood based on the current working state of the range hood and the user's control action includes: if the range hood is in a sleep state and the user performs a control action, then determining the control command of the range hood to be adjusted from the sleep state to the first suction level state.

[0011] As an optional implementation, determining the control command of the range hood based on the current working state of the range hood and the user's control action further includes: if the range hood is in the first suction level state and the user performs a control action, then the control command of the range hood is determined to be adjusting the suction level.

[0012] As an optional implementation, determining the control command of the range hood based on the current working state of the range hood and the user's control action further includes: if the range hood is in the second suction level state and the user performs a control action, then determining the control command of the range hood to be adjusted from the second suction level state to the sleep state, wherein the second suction level state is obtained by adjusting the first suction state at least once.

[0013] Secondly, embodiments of this application provide a control device for a range hood, applied to a range hood. The range hood is equipped with sensors and reflective devices spaced apart. Each sensor includes a signal transmitter and a signal receiver. The control device includes: a signal transmitter control module, used to control the signal transmitter to continuously transmit detection signals and continuously change the signal transmission direction of the detection signals; the signal receiver receives a first detection signal reflected by a user's palm in a first detection area and a second detection signal reflected by the user's palm in a second detection area, wherein the second detection signal is a detection signal reflected by the reflective device after receiving the detection signal reflected by the user's palm in the second detection area; the first detection area and the second detection area do not overlap; a control action determination module, used to determine a user control action based on the transmission time of the detection signal transmitted by the signal transmitter in the target signal transmission direction and the time information of the first and second detection signals received by the signal receiver; and a control command determination module, used to determine a control command for the range hood based on the current operating state of the range hood and the user's control action, and to control the range hood according to the control command.

[0014] As an optional implementation, the signal transmitting unit control module is specifically used to: control the signal transmitting unit to rotate by a preset angle along the direction close to the reflector during the continuous transmission of detection signals through the signal transmitting unit, so as to change the signal transmission direction of the signal transmitting unit from a first signal transmission direction to a second signal transmission direction; the first signal transmission direction and the second signal transmission direction intersect.

[0015] The technical solutions provided by the embodiments of this application bring at least the following beneficial effects:

[0016] Users can wave their arms in any direction in front of the range hood to reflect the detection signals before and after changing the signal transmission direction back to the same signal receiving unit. The signal receiving unit receives the detection transmission, including the detection signal emitted by the reflector. By using the timing information of the reflected detection signal received by the signal receiving unit, it determines whether the user has performed a control action. After determining that the user has performed a control action, it adjusts the operating state of the range hood to the target state based on the current operating state of the range hood, thereby achieving non-contact control of the range hood and avoiding soiling the surface of the range hood when using hands with grime.

[0017] It should be understood that the above general description and the following detailed description are exemplary and explanatory only, and do not limit this application. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, 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 the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 A schematic diagram of the detection signal transmission and reflection detection signal of a control method for a range hood provided in this application embodiment;

[0020] Figure 2 A flowchart illustrating a control method for a range hood provided in an embodiment of this application;

[0021] Figure 3 This is a schematic diagram of the frame structure of a control device for a range hood provided in an embodiment of this application.

[0022] Figure labels and corresponding explanations:

[0023] 1: Signal transmitting unit control module;

[0024] 2: Control Action Determination Module;

[0025] 3: Control command determination module;

[0026] θ: Figure 1 The angle between AF1 and AG and the angle between AG and GC. Detailed Implementation

[0027] To make the objectives, technical solutions, and advantages of this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the scope of this application.

[0028] This application provides a control method for a range hood, applicable to a range hood, wherein sensors and reflective devices are spaced apart on the range hood, and the sensors include a signal transmitter and a signal receiver.

[0029] In one possible implementation, a schematic diagram of the detection signal transmission and reflection detection signal of a range hood control method is shown below. Figure 1 As shown, Figure 1 In the diagram, A represents the location of the first sensor, and B represents the location of the reflector. The front panel of the range hood (the panel facing the user) is equipped with sensors and reflectors spaced apart. The sensors are located on the first side, and the signal transmitting part of the sensor can rotate in a preset direction to change the signal transmission direction of the detection signal. The front panel of the range hood includes a curved part for avoidance, so that the signal receiving part can receive the detection signal reflected by the reflector. The reflector is located on the second side, and the first and second sides are opposite sides. The first and second sides can be the left and right sides of the front panel, or the top and bottom sides of the front panel. In this embodiment, the left and right sides of the front panel are used as examples for illustration.

[0030] Alternatively, the sensor can be either an infrared sensor or an ultrasonic sensor.

[0031] Optionally, the reflecting device can be a reflector used to reflect the detection signal emitted by the sensor and the detection signal emitted by the sensor reflected by the obstacle, wherein the obstacle can be the user's arm.

[0032] like Figure 2 As shown, the control method for a range hood provided in this application mainly includes steps S1-S3:

[0033] Step S1: The control signal transmitting unit continuously transmits detection signals and continuously changes the signal transmission direction of the detection signals. The signal receiving unit receives the first detection signal reflected by the user's palm in the first detection area and the second detection signal reflected by the user's palm in the second detection area.

[0034] The second detection signal is the detection signal reflected by the reflective device after receiving the detection signal reflected by the user's palm in the second detection area and then reflecting it to the signal receiving unit; the first detection area and the second detection area do not overlap.

[0035] Step S2: Based on the transmission time of the detection signal emitted by the signal transmitter in the target signal transmission direction, and the time information of the first and second detection signals received by the signal receiver, determine the user's control action.

[0036] Step S3: Based on the current working status of the range hood and the user's control actions, determine the control command for the range hood, and control the range hood according to the control command.

[0037] The range hood control method provided in this application allows users to wave their arms in any direction in front of the range hood to reflect the detection signals before and after changing the signal transmission direction to the same signal receiving unit. The detection transmission received by the signal receiving unit includes the detection signal emitted by the reflecting device. By using the time information of the reflected detection signal received by the signal receiving unit, the user's control action is determined. After determining that the user has performed a control action, the operating state of the range hood is adjusted to the target state according to the current operating state of the range hood, so as to achieve non-contact control of the range hood and avoid soiling the surface of the range hood when using hands with grime to control it.

[0038] As an optional implementation, the control signal transmitting unit in step S1 continuously transmits a detection signal and continuously changes the direction of the transmitted detection signal, including:

[0039] During the continuous transmission of detection signals through the signal transmitter, the signal transmitter is controlled to rotate by a preset angle in the direction close to the reflector, so as to change the signal transmission direction of the signal transmitter from the first signal transmission direction to the second signal transmission direction; the first signal transmission direction and the second signal transmission direction intersect.

[0040] As an optional implementation, the control signal transmitting unit in step S1 continuously transmitting a detection signal and continuously changing the direction of the transmitted detection signal further includes:

[0041] After the control signal transmitting unit rotates by a preset angle in the direction close to the reflector, the control signal transmitting unit rotates by a preset angle in the direction away from the reflector to change the signal transmitting direction of the signal transmitting unit from the second signal transmitting direction to the first signal transmitting direction.

[0042] In one possible implementation, such as Figure 1As shown, the first signal transmission direction is from A to F1, the second signal transmission direction is from A to F2, and the signal receiving direction of the signal receiving unit is from F1 to A, meaning the signal receiving direction of the signal receiving unit is opposite to the first signal transmission direction. The aforementioned first detection area is positioned along the path of the detection signal transmitted in the first signal transmission direction, and the signal receiving unit can only receive detection signals transmitted in the first signal transmission direction. The aforementioned second detection area is positioned along the centerline of the line connecting at least a portion of the signal receiving unit and the reflecting device.

[0043] Under the driving action of the drive unit, the signal transmitting part can rotate to the right (towards the reflector) by a preset angle. Figure 1 The angle between AF1 and AF2 is used to change the signal transmission direction of the signal transmitter from the first signal transmission direction to the second signal transmission direction. Then, the signal transmitter rotates to the left (away from the reflector) by a preset angle, so that the signal transmission direction of the signal transmitter changes back to the first signal transmission direction. This process of changing the transmission direction is repeated continuously, thus forming a fan-shaped area with the signal transmitter as the vertex, the signal transmission distance of the signal transmitter (the distance from A to F1 or the distance from A to F2, and the distance from A to F1 is equal to the distance from A to F2) as the radius, and the angular radius as a preset angle. That is, the fan-shaped area defined by A, F1 and F2, and this fan-shaped area is the coverage area of ​​the detection signal.

[0044] As an optional implementation, the target signal transmission direction in step S2 is the first signal transmission direction, and the time information includes the start and end reception times. Based on the transmission time of the detection signal transmitted by the signal transmitter in the target signal transmission direction, and the time information of the first and second detection signals received by the signal receiver, a user control action is determined, including:

[0045] If the time difference between the start time of receiving the first detection signal received by the signal receiving unit and the transmission time of the detection signal transmitted by the signal transmitting unit in the first signal transmission direction is within a first preset time difference threshold, and the time difference between the end time of receiving the first detection signal received by the signal receiving unit and the start time of receiving the first detection signal is within a second preset time difference threshold, and the time difference between the end time of receiving the second detection signal received by the signal receiving unit and the start time of receiving the second detection signal is within a third preset time difference threshold, then it is determined that the user has performed a control action.

[0046] The first preset time difference threshold is equal to the third preset time difference threshold, and neither of them is greater than the second preset time difference threshold.

[0047] In one possible implementation, such as Figure 1As shown, the detection signals emitted by the signal transmitter along the direction from A to E and from A to G can both be reflected detection signals received by the signal receiver. When the user performs a control action from left to right (e.g., a hand gesture), the user's hand will first be in front of the signal receiver, i.e., on AF1, so that the signal receiver can receive the reflected detection signal emitted along the first signal transmission direction. When the user's hand waves to the right, and the detection signal is emitted to the user's palm at any position on EG, the palm will reflect the detection signal to the reflection device (the detection signal emitted along the direction from A to E is reflected to the reflection device along the direction from E to B, and the detection signal emitted along the direction from A to G is reflected to the reflection device along the direction from G to B), and the reflection device will then reflect it back to the signal receiver along the direction from B to A.

[0048] To improve the success rate of detecting control actions, the start and end times of the signal receiving unit can be obtained, and the user's control action can be determined by whether the time interval between the start and end times is within a preset time interval threshold.

[0049] Optionally, the first preset time difference threshold is not less than 6 milliseconds and not more than 20 milliseconds.

[0050] Optionally, the second preset time difference threshold is not less than 100 milliseconds and not more than 500 milliseconds.

[0051] Optionally, the third preset time difference threshold is not less than 6 milliseconds and not more than 20 milliseconds.

[0052] like Figure 1 As shown, the distance between A and B is L, the vertical distance from the reflection position of the reflected signal received by the signal receiver to C is D, and the signal transmitter rotates from left to right by θ. Then the relationship between the rotation angle θ of the signal transmitter, the distance L between A and B, and the vertical distance D from the reflection position of the reflected signal received by the signal receiver to C is: tanθ=AC / CG=L / 2D.

[0053] In this embodiment, the reflection position of the first reflected detection signal received by the signal receiving unit is located on AF1, and the reflection position of the detection signal reflected by the user's arm in the second reflected signal received by the signal receiving unit is located on CG (the center line of AB). The user's arm reflects the reflected detection signal to the reflecting device, which then reflects it back to the signal receiving unit. Thus, the minimum distance for the user to wave their arm from left to right or from right to left is L / 2, resulting in a smaller waving motion and distance. Furthermore, the effective detection distance from the user's palm to the range hood, i.e., the length D, can be flexibly adjusted by limiting the length L and the rotation angle θ of the signal transmitter.

[0054] In one possible embodiment, when the user's palm is at position F1, the signal receiver receives the reflected detection signal. When the user's palm moves from position F1 to position G, if the user's palm reaches position G earlier than the signal transmitter transmitting the detection signal along the AG direction, the palm hovers until the signal transmitter transmits the detection signal along the AG direction, so that the signal receiver can receive the detection signal reflected along GB.

[0055] If the user's palm arrives at position G after the signal transmitter emits the detection signal along the AG direction, the transmitter hovers until its emission direction changes to AF2, then rotates to the left to adjust to the AG direction. This allows the signal receiver to receive the detection signal reflected along GB. This configuration allows the detection signal to be emitted twice to the same reflection position, improving the success rate of detecting the user's waving motion.

[0056] As an optional implementation, the target signal transmission direction in step S2 is the second signal transmission direction, and the time information includes the start and end reception times. Based on the transmission time of the detection signal transmitted by the signal transmitter in the target signal transmission direction, and the time information of the first and second detection signals received by the signal receiver, a user control action is determined, including:

[0057] If the time difference between the start time of receiving the second detection signal received by the signal receiving unit and the transmission time of the detection signal transmitted by the signal transmitting unit in the second signal transmission direction is within the fourth preset time difference threshold, then the time difference between the end time of receiving the second detection signal received by the signal receiving unit and the start time of receiving the second detection signal is within the fifth preset time difference threshold, and the time difference between the end time of receiving the first detection signal received by the signal receiving unit and the start time of receiving the first detection signal is within the sixth preset time difference threshold, then it is determined that the user has performed a control action.

[0058] Among them, the fourth preset time difference threshold is equal to the sixth preset time difference threshold, and neither is greater than the fifth preset time difference threshold.

[0059] The process of determining whether a user is waving from right to left is similar to the process of determining whether a user is waving from left to right, so it will not be described again here. This embodiment of the application can only detect the user's waving action, but cannot determine the direction of the user's waving action.

[0060] Optionally, the fourth preset time difference threshold is not less than 6 milliseconds and not more than 20 milliseconds.

[0061] Optionally, the fifth preset time difference threshold is not less than 100 milliseconds and not more than 500 milliseconds.

[0062] Optionally, the sixth preset time difference threshold is not less than 6 milliseconds and not more than 20 milliseconds.

[0063] As an optional implementation, the control command for the range hood is determined based on the current operating status of the range hood and the user's control actions, including:

[0064] If the range hood is in sleep mode and the user performs a control action, the control command for the range hood is determined to be to switch from sleep mode to the first suction level.

[0065] As an optional implementation, the control command for the range hood is determined based on the current operating status of the range hood and the user's control actions, and further includes:

[0066] If the range hood is in the first suction level and the user performs a control action, then the control command for the range hood is determined to be adjusting the suction level.

[0067] As an optional implementation, the control command for the range hood is determined based on the current operating status of the range hood and the user's control actions, and further includes:

[0068] If the range hood is in the second suction level state and the user performs a control action, the control command for the range hood is determined to be to adjust from the second suction level state to the sleep state. The second suction level state is obtained by adjusting the first suction level state at least once.

[0069] Optionally, the range hood's suction levels include an intelligent suction state, and a first-level suction state, a second-level suction state, and a third-level suction state with progressively increasing suction intensity.

[0070] Optionally, the first suction level state is the intelligent suction state.

[0071] Optionally, the second suction level is the third suction level.

[0072] In one possible implementation, if the range hood is in sleep mode and a user action is confirmed, the control command for the range hood is determined to be switching from sleep mode to intelligent suction mode; if the range hood is in intelligent suction mode and a user action is confirmed, the control command for the range hood is determined to be switching from intelligent suction mode to high-power suction mode; if the range hood is in high-power suction mode and a user action is confirmed, the control command for the range hood is determined to be switching from intelligent suction mode to first-level suction mode; if the range hood is in first-level suction mode and a user action is confirmed, the control command for the range hood is determined to be switching from first-level suction mode to second-level suction mode; if the range hood is in second-level suction mode and a user action is confirmed, the control command for the range hood is determined to be switching from second-level suction mode to third-level suction mode; if the range hood is in third-level suction mode and a user action is confirmed, the control command for the range hood is determined to be switching from third-level suction mode back to sleep mode.

[0073] Optionally, if the range hood is in sleep mode and it is determined that the user performs a control action, then the control command for the range hood is determined to be to switch from sleep mode to intelligent suction mode and turn on the lighting mode.

[0074] Optionally, if the range hood is in the second suction level state and it is determined that the user performs a control action, then the control command for the range hood is determined to be to switch from the second suction level state to sleep state and turn off the lighting state.

[0075] Based on the same inventive concept, such as Figure 3 As shown in the illustration, this application provides a control device for a range hood. The range hood includes sensors and reflective devices spaced apart. Each sensor includes a signal transmitter and a signal receiver. The control device includes a signal transmitter control module 1, a control action determination module 2, and a control command determination module 3. The signal transmitter control module 1 controls the signal transmitter to continuously transmit detection signals and continuously change the signal transmission direction. The signal receiver receives a first detection signal reflected by the user's palm in a first detection area and a second detection signal reflected by the user's palm in a second detection area. The second detection signal is the detection signal reflected by the reflective device after receiving the detection signal reflected by the user's palm in the second detection area. The first and second detection areas do not overlap. The control action determination module 2 determines the user's control action based on the transmission time of the detection signal transmitted by the signal transmitter in the target signal transmission direction and the time information of the first and second detection signals received by the signal receiver. The control command determination module 3 determines the control command for the range hood based on the current operating state of the range hood and the user's control action, and controls the range hood according to the control command.

[0076] As an optional implementation, the signal transmitting unit control module 1 is specifically used to: control the signal transmitting unit to rotate by a preset angle along the direction close to the reflecting device during the continuous transmission of detection signals by the signal transmitting unit, so as to change the signal transmission direction of the signal transmitting unit from the first signal transmission direction to the second signal transmission direction; wherein the first signal transmission direction and the second signal transmission direction intersect.

[0077] As an optional implementation, the signal transmitting unit control module 1 is further configured to: after controlling the signal transmitting unit to rotate a preset angle in the direction close to the reflecting device, control the signal transmitting unit to rotate a preset angle in the direction away from the reflecting device, so as to change the signal transmitting direction of the signal transmitting unit from the second signal transmitting direction to the first signal transmitting direction.

[0078] As an optional implementation, the control action determination module 2 is configured to: determine that the user performs a control action if the time difference between the start time of receiving the first detection signal received by the signal receiving unit and the transmission time of the detection signal transmitted by the signal transmitting unit in the first signal transmission direction is within a first preset time difference threshold, and the time difference between the end time of receiving the first detection signal received by the signal receiving unit and the start time of receiving the first detection signal is within a second preset time difference threshold, and the time difference between the end time of receiving the second detection signal received by the signal receiving unit and the start time of receiving the second detection signal is within a third preset time difference threshold; the first preset time difference threshold is equal to the third preset time difference threshold, and neither is greater than the second preset time difference threshold.

[0079] As an optional implementation, the control action determination module 2 is configured to: if the time difference between the start time of receiving the second detection signal received by the signal receiving unit and the transmission time of the detection signal transmitted by the signal transmitting unit in the second signal transmission direction is within a fourth preset time difference threshold, then the time difference between the end time of receiving the second detection signal received by the signal receiving unit and the start time of receiving the second detection signal is within a fifth preset time difference threshold, and the time difference between the end time of receiving the first detection signal received by the signal receiving unit and the start time of receiving the first detection signal is within a sixth preset time difference threshold, then determine that the user performs a control action; the fourth preset time difference threshold is equal to the sixth preset time difference threshold, and neither is greater than the fifth preset time difference threshold.

[0080] As an optional implementation, the control command determination module 3 is used to: if the range hood is in a sleep state and the user performs a control action, determine that the control command for the range hood is to adjust from the sleep state to the first suction level state.

[0081] As an optional implementation, the control command determination module 3 is further configured to: if the range hood is in the first suction level state and the user performs a control action, determine that the control command for the range hood is to adjust the suction level.

[0082] As an optional implementation, the control command determination module 3 is further configured to: if the range hood is in the second suction level state and the user performs a control action, determine that the control command for the range hood is to adjust from the second suction level state to the sleep state, wherein the second suction level state is obtained by adjusting the first suction level state at least once.

[0083] Specific limitations regarding the control device of the range hood can be found in the limitations on the control method of the range hood mentioned above, and will not be repeated here. Each module in the aforementioned control device of the range hood can be implemented entirely or partially through software, hardware, or a combination thereof. These modules can be embedded in the processor of a computer device in hardware form or independent of it, or stored in the memory of a computer device in software form, so that the processor can call and execute the corresponding operations of each module.

[0084] It should be understood that, although Figure 2 The steps in the flowchart are shown sequentially as indicated by the arrows, but these steps are not necessarily executed in the order indicated by the arrows. Unless otherwise specified herein, there is no strict order in which these steps are executed, and they can be performed in other orders. Figure 2 At least some of the steps in the process may include multiple steps or multiple stages. These steps or stages are not necessarily completed at the same time, but may be executed at different times. The execution order of these steps or stages is not necessarily sequential, but may be executed in turn or alternately with other steps or at least some of the steps or stages in other steps.

[0085] It is understood that the same / similar parts between the various embodiments of the methods described above in this specification can be referred to each other. Each embodiment focuses on the differences from other embodiments, and relevant parts can be referred to the description of other method embodiments.

[0086] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0087] The various embodiments in this specification are described in a related manner. Similar or identical parts between embodiments can be referred to mutually. Each embodiment focuses on describing the differences from other embodiments. In particular, the system embodiments are basically similar to the method embodiments, so the description is relatively simple; relevant parts can be referred to the descriptions of the method embodiments.

[0088] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0089] The embodiments described above are merely illustrative of several implementation methods of this application, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the invention patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application. Therefore, the protection scope of this patent application should be determined by the appended claims.

Claims

1. A control method for a range hood, characterized in that, The method, applied to a range hood, wherein sensors and reflective devices are spaced apart on the range hood, and the sensors include a signal transmitter and a signal receiver, comprises: The signal transmitting unit is controlled to continuously transmit detection signals and continuously change the signal transmission direction of the detection signals. The signal receiving unit receives a first detection signal reflected by the user's palm in a first detection area and a second detection signal reflected by the user's palm in a second detection area. The second detection signal is the detection signal reflected by the reflecting device after receiving the detection signal reflected by the user's palm in the second detection area and then reflecting it to the signal receiving unit. The first detection area and the second detection area do not overlap. Based on the transmission time of the detection signal emitted by the signal transmitter in the target signal transmission direction, and the time information of the first detection signal and the second detection signal received by the signal receiver, a control action by the user is determined; the time information includes the start time and end time of reception. Based on the current working status of the range hood and the user's control actions, determine the control command for the range hood, and control the range hood according to the control command; The control of the signal transmitting unit to continuously transmit detection signals and continuously change the signal transmission direction of the detection signals includes: During the continuous transmission of detection signals through the signal transmitting unit, the signal transmitting unit is controlled to rotate by a preset angle in the direction close to the reflector, so as to change the signal transmission direction of the signal transmitting unit from the first signal transmission direction to the second signal transmission direction; the first signal transmission direction and the second signal transmission direction intersect. After controlling the signal transmitting unit to rotate a preset angle in a direction close to the reflector, the signal transmitting unit is then controlled to rotate the preset angle in a direction away from the reflector, so as to change the signal transmitting direction of the signal transmitting unit from the second signal transmitting direction to the first signal transmitting direction; The target signal transmission direction is the first signal transmission direction. The step of determining the user's control action based on the transmission time of the detection signal emitted by the signal transmitter in the target signal transmission direction and the time information of the first and second detection signals received by the signal receiver includes: If the time difference between the start time of receiving the first detection signal received by the signal receiving unit and the transmission time of the detection signal transmitted by the signal transmitting unit in the first signal transmission direction is within a first preset time difference threshold, and the time difference between the end time of receiving the first detection signal received by the signal receiving unit and the start time of receiving the first detection signal is within a second preset time difference threshold, and the time difference between the end time of receiving the second detection signal received by the signal receiving unit and the start time of receiving the second detection signal is within a third preset time difference threshold, then it is determined that the user has performed a control action; the first preset time difference threshold is equal to the third preset time difference threshold, and neither is greater than the second preset time difference threshold; The target signal transmission direction is the second signal transmission direction, and the time information includes the start time and end time of reception. The step of determining the user's control action based on the transmission time of the detection signal emitted by the signal transmitter in the target signal transmission direction and the time information of the first and second detection signals received by the signal receiver includes: If the time difference between the start time of receiving the second detection signal received by the signal receiving unit and the transmission time of the detection signal transmitted by the signal transmitting unit in the second signal transmission direction is within a fourth preset time difference threshold, then the time difference between the end time of receiving the second detection signal received by the signal receiving unit and the start time of receiving the second detection signal is within a fifth preset time difference threshold, and the time difference between the end time of receiving the first detection signal received by the signal receiving unit and the start time of receiving the first detection signal is within a sixth preset time difference threshold, then it is determined that the user has performed a control action; the fourth preset time difference threshold is equal to the sixth preset time difference threshold, and neither is greater than the fifth preset time difference threshold.

2. The control method for a range hood according to claim 1, characterized in that, The step of determining the control command for the range hood based on its current operating status and the user's control actions includes: If the range hood is in a sleep state and the user performs a control action, then the control command for the range hood is determined to be to adjust from the sleep state to the first suction level state.

3. The control method for a range hood according to claim 1, characterized in that, The step of determining the control command for the range hood based on its current operating status and the user's control actions further includes: If the range hood is in the first suction level state and the user performs a control action, then the control command for the range hood is determined to be adjusting the suction level.

4. The control method for a range hood according to claim 2 or 3, characterized in that, The step of determining the control command for the range hood based on its current operating status and the user's control actions further includes: If the range hood is in the second suction level state and the user performs a control action, then the control command for the range hood is determined to be to adjust from the second suction level state to the sleep state. The second suction level state is obtained by adjusting the first suction level state at least once.

5. A control device for a range hood, characterized in that, Applied to range hoods, the range hood is equipped with sensors and reflective devices spaced apart, the sensors include a signal transmitter and a signal receiver, and the control device includes: The signal transmitting unit control module (1) is used to control the signal transmitting unit to continuously transmit detection signals and continuously change the signal transmission direction of the detection signals. The signal receiving unit receives a first detection signal reflected by the user's palm in a first detection area and a second detection signal reflected by the user's palm in a second detection area. The second detection signal is the detection signal reflected by the reflecting device after receiving the detection signal reflected by the user's palm in the second detection area and then reflecting it to the signal receiving unit. The first detection area and the second detection area do not overlap. The control action determination module (2) is used to determine the user's control action based on the transmission time of the detection signal transmitted by the signal transmitter in the target signal transmission direction and the time information of the first detection signal and the second detection signal received by the signal receiver respectively. The control command determination module (3) is used to determine the control command of the range hood based on the current working status of the range hood and the control action performed by the user, and to control the range hood according to the control command. The signal transmitting unit control module (1) is specifically used for: During the continuous transmission of detection signals through the signal transmitting unit, the signal transmitting unit is controlled to rotate by a preset angle in the direction close to the reflector, so as to change the signal transmission direction of the signal transmitting unit from the first signal transmission direction to the second signal transmission direction; the first signal transmission direction and the second signal transmission direction intersect. The control action determination module (2) is further configured to: if the time difference between the start time of receiving the first detection signal received by the signal receiving unit and the transmission time of transmitting the detection signal by the signal transmitting unit in the first signal transmission direction is within a first preset time difference threshold, and the time difference between the end time of receiving the first detection signal received by the signal receiving unit and the start time of receiving the first detection signal is within a second preset time difference threshold, and the time difference between the end time of receiving the second detection signal received by the signal receiving unit and the start time of receiving the second detection signal is within a third preset time difference threshold, then determine that the user performs a control action; the first preset time difference threshold is equal to the third preset time difference threshold, and neither is greater than the second preset time difference threshold; The control action determination module (2) is further configured to: if the time difference between the start time of receiving the second detection signal received by the signal receiving unit and the transmission time of transmitting the detection signal by the signal transmitting unit in the second signal transmission direction is within the fourth preset time difference threshold, then the time difference between the end time of receiving the second detection signal received by the signal receiving unit and the start time of receiving the second detection signal is within the fifth preset time difference threshold, and the time difference between the end time of receiving the first detection signal received by the signal receiving unit and the start time of receiving the first detection signal is within the sixth preset time difference threshold, then determine that the user performs a control action; the fourth preset time difference threshold is equal to the sixth preset time difference threshold, and neither is greater than the fifth preset time difference threshold.

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