Inductive control method of range hood and range hood

Abstract

The invention relates to an induction control method of a range hood and the range hood, and belongs to the technical field of intelligent kitchen appliances. The method comprises the following steps: obtaining a reference capacitance value of an induction coil key according to a first real-time capacitance value, determining whether to trigger an induction coil key or not according to the induction mode, the second real-time capacitance value, the reference capacitance value and a preset distance capacitance threshold value, and determining whether to release the induction coil key or not according to the second real-time capacitance value and the reference capacitance value; according to the technology, the reference capacitance value is firstly calculated after the range hood is started, and the induction coil key can be triggered or released according to the real-time capacitance value change caused by the distance between the hand and the induction coil key, so that various functions of the range hood can be controlled, and non-contact control of all the functions of the range hood can be realized; and meanwhile, the user can select an induction mode suitable for himself / herself, so that the use experience of the user is effectively improved.

Description

Technical Field

[0001] This invention belongs to the field of intelligent kitchen appliance technology, specifically relating to a sensing control method for a range hood and a range hood. Background Technology

[0002] Most range hoods on the market are operated via touch panels. However, due to the special environment of the kitchen, touch operation can cause many problems for range hood users when their hands are covered in flour or oil, or when they are unwilling to touch the dirty buttons with clean hands.

[0003] Existing technologies generally utilize infrared signals for contactless control. The control is triggered by the sequence of infrared signals received by infrared receivers at different locations on the range hood. However, this method only supports two operations: waving your hand from left to right triggers the power button, while waving your hand from right to left triggers the power button. Therefore, using infrared signals can only perform simple power on / off functions without contact, which cannot meet users' needs for more functions and results in a poor user experience. Summary of the Invention

[0004] To address this issue, the present invention provides a sensing control method and a range hood, thereby solving the problem that existing range hoods can only perform simple on / off functions non-contactly, failing to meet users' diverse functional requirements and resulting in a poor user experience.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: In a first aspect, the present invention provides a sensor control method for a range hood, the range hood including a display control panel assembly; the display control panel assembly is provided with a plurality of induction coil buttons; the method includes: The reference capacitance value is obtained based on the first real-time capacitance value; the first real-time capacitance value is the capacitance value of the induction coil button obtained in real time within a first preset time after the range hood is turned on. Whether to trigger the induction coil button is determined based on the sensing mode, the second real-time capacitance value, the reference capacitance value, and the preset air-to-ground capacitance threshold; the second real-time capacitance value is the capacitance value of the induction coil button obtained in real time after the range hood is turned on and a first preset time has elapsed; the sensing mode includes air-to-ground sensing, touch sensing, and hybrid sensing. Whether to release the induction coil button is determined based on the second real-time capacitance value and the reference capacitance value.

[0006] Further, obtaining the reference capacitance value based on the first real-time capacitance value includes: Divide the first preset duration into a preset number of time periods; The first real-time capacitance value is obtained once every second preset time interval during the time period to obtain the time period capacitance value group corresponding to the time period. After removing the maximum and minimum values ​​from the time period capacitance value group, the average of the remaining time period capacitance values ​​is taken as the time period capacitance value. The average of the capacitance values ​​of the preset number of time periods is used as the reference capacitance value.

[0007] Further, determining whether to trigger the first induction coil button based on the sensing mode, the second real-time capacitance value, the reference capacitance value, and the preset isolation capacitance threshold includes: When the sensing mode is air-sensing, the second real-time capacitance value is acquired in real time after the range hood is turned on for a first preset time. Subtracting the reference capacitance value from the second real-time capacitance value yields the real-time incremental capacitance value. When C 实时增量 >C 隔空阈值 When the induction coil button is in a triggered state, it is determined that C is in a triggered state. 实时增量 This represents the real-time incremental capacitance value; C 隔空阈值 This is the preset threshold for the isolation capacitor.

[0008] Further, determining whether to trigger the induction coil button based on the sensing mode, the second real-time capacitance value, the reference capacitance value, and the preset isolation capacitance threshold includes: When the sensing mode is touch sensing, the second real-time capacitance value is acquired in real time after the range hood is turned on for a first preset time. Subtracting the reference capacitance value from the second real-time capacitance value yields the real-time incremental capacitance value. When C 实时增量 >C 触摸阈值 When the induction coil button is in a triggered state, C is determined to be in a triggered state. 实时增量 This represents the real-time incremental capacitance value; C 触摸阈值 This is the preset touch capacitance threshold.

[0009] Further, determining whether to trigger the induction coil button based on the sensing mode, the second real-time capacitance value, the reference capacitance value, and the preset isolation capacitance threshold includes: When the sensing mode is hybrid sensing, the second real-time capacitance value is acquired in real time after the range hood is turned on for a first preset time. Subtracting the reference capacitance value from the second real-time capacitance value yields the real-time incremental capacitance value. When C 实时增量 >C 隔空阈值 The timer starts at 2 o'clock; When C 实时增量 >C 隔空阈值 At that time, record the current first duration T1 and then continue timing; where C实时增量 This represents the real-time incremental capacitance value; C 隔空阈值 The preset threshold for the isolation capacitor; If T 总 =T1×3 duration, and continuous C 实时增量 <C 隔空阈值 ×4 indicates that the induction coil button is in a contactless sensing trigger state; where T 总 The total duration from the start of the timer to the present, T1 is the first duration; If T 总 =T1×3 time period, when C 实时增量 ≥C 隔空阈值 When the value is ×4, record the current second duration T2 and continue timing. The second duration T2 is given by the formula T2 = T 总 - T1 is calculated; if T 总 =Within a duration of T1×5, and continuously C 实时增量 <C 隔空阈值 ×16, then the induction coil button is determined to be in the air-sensing trigger state; if T 总 =Within a time period of T1×5, when C 实时增量 ≥C 隔空阈值 When the value is ×16, the current third duration T3 is recorded. The third duration T3 is given by the formula T3 = T 总 - T2 is calculated; if T3 > T2, then the induction coil button is determined to be in the trigger state of contactless sensing; if T 总 >T 预设触发时长 If the induction coil button remains in the released state, then the induction coil button is determined to be in a touch-sensitive triggered state; where T 预设触发时长 Preset trigger duration; If C appears after the start of the timer... 实时增量 >C 触摸阈值 If so, the induction coil button is determined to be in a touch-sensitive trigger state.

[0010] Further, determining whether to release the induction coil button based on the second real-time capacitance value and the reference capacitance value includes: The real-time incremental capacitance value before the induction coil button is in the triggered state is obtained as the historical incremental capacitance value. The maximum value among the historical incremental capacitance values ​​is taken as the maximum incremental capacitance value; Multiply the maximum incremental capacitance value by a first preset percentage to obtain the release capacitance threshold; When the real-time incremental capacitance value is less than the release capacitance threshold, the induction coil button is determined to be in the released state.

[0011] Furthermore, the method also includes: After the induction coil button is in the released state, the reference capacitance value is updated according to the first formula, which is: C` 基准 = C 基准 -C 最大增量 / 2; Among them, C` 基准 For the updated reference capacitance value, C 基准 C is the reference capacitance value before the update. 最大增量 This represents the maximum incremental capacitance value.

[0012] Furthermore, the method also includes: Multiply the preset isolation capacitor threshold by the second preset percentage to obtain the fast trigger capacitor threshold; When the induction coil button is in the released state and the real-time incremental capacitance value is detected to be greater than the fast trigger capacitance threshold within the third preset time period, the induction coil button is determined to be in the triggered state; the timing start point of the third preset time period is the time point at which the growth rate of the second real-time capacitance value is detected to be greater than the preset growth rate.

[0013] Furthermore, the method also includes: If the real-time incremental capacitance value of multiple induction coil buttons is greater than the preset isolation capacitance threshold, then the induction coil button with the largest real-time incremental capacitance value among the multiple induction coil buttons will be set to the triggered state.

[0014] In a second aspect, the present invention provides a range hood, wherein the range hood applies the air-sensing control method of any one of claims 1-9, and the range hood comprises: Cabinet, outer shell assembly, glass panel and display control panel assembly; The bottom of the housing is fixedly connected to the top of the outer shell assembly; The display operation panel assembly is disposed on the inner side of the glass panel of the housing assembly; The display operation panel assembly includes an upper shell, a lower shell, and a display operation panel inside the lower shell; the upper shell and the lower shell are fixedly connected; the display operation panel is provided with a plurality of induction coil buttons; the upper shell is provided with cutouts corresponding to the induction coil buttons; The upper shell is attached and fixed to the inner side of the glass panel.

[0015] The present invention, by adopting the above technical solution, has at least the following beneficial effects: A method for induction control of a range hood and a range hood itself are provided. The method calculates a reference capacitance value for the induction coil button based on a first real-time capacitance value. It then determines whether to trigger the induction coil button based on the induction mode, a second real-time capacitance value, the reference capacitance value, and a preset contactless capacitance threshold. Finally, it determines whether to release the induction coil button based on the second real-time capacitance value and the reference capacitance value. This technology first calculates the reference capacitance value after the range hood is turned on. The real-time capacitance value change caused by the distance between the user's hand and the induction coil button allows for the triggering or release of the induction coil button, thus controlling various functions of the range hood. This enables contactless control of all functions of the range hood, and users can also select a suitable induction mode, effectively improving the user experience.

[0016] It should be understood that the above general description and the following detailed description are exemplary and explanatory only, and are not intended to limit the invention. Attached Figure Description

[0017] 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.

[0018] Figure 1 This is a flowchart illustrating an exemplary embodiment of the present invention of a sensor control method for a range hood; Figure 2 This is a schematic diagram of the structure of a range hood shown in an exemplary embodiment of the present invention; Figure 3 This is a schematic diagram A illustrating the structure of a display operation panel assembly according to an exemplary embodiment of the present invention; Figure 4 This is a schematic diagram B illustrating the structure of a display operation panel assembly according to an exemplary embodiment of the present invention.

[0019] The present invention will be further described below with reference to the accompanying drawings and specific embodiments. Detailed Implementation

[0020] To make the objectives, technical solutions, and advantages of this invention clearer, the technical solutions of this invention will be described in detail below. Obviously, the described embodiments are merely some embodiments of this invention, and not all embodiments. Based on the embodiments of this invention, all other implementation methods obtained by those skilled in the art without creative effort are within the scope of protection of this invention.

[0021] In current technology, most range hoods are operated via touch panels. However, due to the special environment of the kitchen, touch operation can be inconvenient when users' hands are covered in flour or grease, or when clean hands are unwilling to touch dirty buttons. Existing technology has developed range hoods that utilize infrared signals for contactless control. These range hoods primarily control the sensing distance by adjusting the transmission frequency and intensity of the infrared signal, while also detecting the speed of hand gestures to avoid interference from the human body. Furthermore, the direction of left and right waving is determined by the order in which different infrared receivers receive the infrared signals. This solution can only detect left and right waving, thus only outputting two states, generally limiting it to simple on / off functions. However, with the increasing functionality of modern range hoods, such as lighting, cleaning, and timer functions, it's inconvenient to integrate these features into the waving gesture, which is a drawback.

[0022] This invention provides a sensing control method for a range hood and a range hood in general. After the range hood is turned on, a reference capacitance value is first calculated. By measuring the real-time capacitance value change caused by the distance between a person's hand and the induction coil button, the induction coil button can be triggered or released, thereby controlling various functions of the range hood. This enables non-contact control of all functions of the range hood. At the same time, users can also select a suitable sensing mode, effectively improving the user experience.

[0023] The method and range hood of the present invention will be described below through specific embodiments.

[0024] Please see Figure 1 , Figure 1 This is a flowchart illustrating an exemplary embodiment of the present invention of a sensor control method for a range hood. See also... Figure 1 The method includes: Step S11: Obtain the reference capacitance value based on the first real-time capacitance value; Step S12: Determine whether to trigger the induction coil button based on the sensing mode, the second real-time capacitance value, the reference capacitance value, and the preset air-blocking capacitance threshold. Step S13: Determine whether to release the induction coil button based on the second real-time capacitance value and the reference capacitance value.

[0025] It should be noted that the technical solution provided in this embodiment is applicable to scenarios including but not limited to: non-contact control of range hoods in specific practices.

[0026] It should be noted that the first real-time capacitance value is the capacitance value of the induction coil button obtained in real time within the first preset time after the range hood is turned on, and the second real-time capacitance value is the capacitance value of the induction coil button obtained in real time after the first preset time has elapsed after the range hood is turned on. The sensing modes include air sensing, touch sensing and hybrid sensing. The first real-time capacitance value and the second real-time capacitance value are real-time capacitance values ​​from different time periods after the range hood is turned on.

[0027] It should be noted that the induction coil button is a capacitive induction coil. The principle of air-sensing is as follows: human skin is a kind of electrolyte that is harmful, which is equivalent to a conductive electrode. When a finger is in the effective area of ​​the capacitive induction coil, it will cause the capacitance of the capacitive induction coil to increase. Measuring the amount of this capacitance change can determine whether a finger is approaching.

[0028] Specifically, the range hood includes a display control panel assembly; the display control panel assembly is equipped with multiple induction coil buttons.

[0029] It is understood that the method provided in this embodiment obtains the reference capacitance value of the induction coil button based on the first real-time capacitance value, determines whether to trigger the induction coil button based on the sensing mode, the second real-time capacitance value, the reference capacitance value, and the preset contactless capacitance threshold, and determines whether to release the induction coil button based on the second real-time capacitance value and the reference capacitance value. This technology first calculates the reference capacitance value after the range hood is turned on, and then uses the real-time capacitance value change caused by the distance between the user's hand and the induction coil button to complete the triggering or release of the induction coil button, thereby completing the control of various functions of the range hood. It can realize non-contact control of all functions of the range hood, and users can also select a suitable sensing mode, effectively improving the user experience.

[0030] In practice, step S11, "obtaining the reference capacitance value based on the first real-time capacitance value", includes: dividing the first preset duration into a preset number of time periods; obtaining the first real-time capacitance value once every second preset duration within the time period to obtain the time period capacitance value group corresponding to the time period; removing the maximum and minimum values ​​in the time period capacitance value group and taking the average of the remaining time period capacitance values ​​as the time period capacitance value; and taking the average of the preset number of time period capacitance values ​​as the reference capacitance value.

[0031] It should be noted that the first preset duration, the second preset duration, and the number of presets can all be set according to specific business needs.

[0032] It should be noted that after the range hood is powered on for the first time, the range hood's capacitance detection module continuously detects the induction coil buttons and records the capacitance values ​​corresponding to the induction coil buttons within a first preset time period. For example, the first preset time period is 5 seconds by default, the preset number of time periods is 50, that is, the duration of each time period is 0.1 seconds, the second preset time period is 0.01 seconds, that is, the first real-time capacitance value is detected and recorded every 0.01 seconds, 10 capacitance values ​​are obtained for each time period as a time period capacitance value group, the maximum and minimum values ​​in the time period capacitance value group are removed, and the average value is taken as the time period capacitance value. The average value of the 50 time period capacitance values ​​is taken as the baseline capacitance value.

[0033] It is understood that the method provided in this embodiment can make the reference capacitance value continuously close to the actual capacitance value of the environment, providing reliable data support for the subsequent determination of the triggering and release of the induction coil button.

[0034] In practice, step S12, "determining whether to trigger the induction coil button based on the sensing mode, the second real-time capacitance value, the reference capacitance value, and the preset isolation capacitance threshold", includes: determining whether the induction coil button is in a triggered state based on the three sensing modes.

[0035] Specifically, when the sensing mode is air-sensing, the second real-time capacitance value is acquired in real time after the range hood has been turned on for a first preset period; the second real-time capacitance value is subtracted from the reference capacitance value to obtain the real-time incremental capacitance value; when C 实时增量 >C 隔空阈值 When the induction coil button is in the triggered state, it is determined that C is in the triggered state. 实时增量 This represents the real-time incremental capacitance value; C 隔空阈值 This is the preset threshold for the isolation capacitor.

[0036] It should be noted that the preset distance capacitance threshold can be a reasonable capacitance value obtained from multiple simulated finger proximity experiments, or it can be set according to specific needs. The principle of the simulation experiment is that the closer the user's finger is to the induction coil button, the larger the induction capacitance will be, and the second real-time capacitance value will also increase accordingly. For the sake of user experience, it should be set as the increment when the finger is a certain distance away from the induction coil button, rather than the increment when the finger is closest to the induction coil button. The preset distance capacitance threshold of this invention is set as the increment of the second real-time capacitance value when the finger is within 10mm of the induction coil button.

[0037] It should be noted that within the first preset time after the range hood is turned on, the reference capacitance value of the induction coil button in the current environment is calculated based on the real-time capacitance value. When the range hood is turned on for a duration greater than or equal to the first preset time, the system begins to determine whether the finger has reached the trigger distance based on the real-time acquired capacitance value of the induction coil button. When C... 实时 -C 基准 >C 隔空阈值When the distance between the finger and the induction coil button is less than 10mm, the induction coil button is determined to be in a triggered state, where C 实时 The capacitance value of the induction coil button, which is acquired in real time, is the second real-time capacitance value, C. 基准 As the reference capacitance value, C 隔空阈值 This is the preset threshold for the isolation capacitor.

[0038] Specifically, when the sensing mode is touch sensing, the second real-time capacitance value is acquired in real time after the range hood has been turned on for a first preset period of time; the second real-time capacitance value is subtracted from the reference capacitance value to obtain the real-time incremental capacitance value; when C 实时增量 >C 触摸阈值 When the induction coil button is in the triggered state, C is determined to be in the triggered state. 实时增量 This represents the real-time incremental capacitance value; C 触摸阈值 This is the preset touch capacitance threshold.

[0039] It should be noted that when using the touch sensing mode, the difference from the air sensing mode is that the air between the glass panel and the hand is not considered when a person approaches. This makes the real-time capacitance increment of the induction coil button much larger than the real-time capacitance increment in the air sensing mode. Similarly, the preset air capacitance threshold of the air sensing mode is much smaller than the preset touch capacitance threshold of the touch sensing mode.

[0040] It should be noted that the preset touch capacitance threshold can be a reasonable capacitance value obtained from multiple simulated finger proximity experiments, or it can be set according to specific needs. The principle of the simulation experiment is that the closer the user's finger is to the induction coil button, the greater the induction capacitance will be, and the second real-time capacitance value will also increase accordingly. For the sake of user experience, it should be set to the increment when the finger is closest to the induction coil button. The preset touch capacitance threshold of this invention is set to the increment of the second real-time capacitance value when the finger is within 0mm of the induction coil button.

[0041] It should be noted that within the first preset time after the range hood is turned on, the reference capacitance value of the induction coil button in the current environment is calculated based on the real-time capacitance value. When the range hood is turned on for a duration greater than or equal to the first preset time, the system begins to determine whether the finger has reached the trigger distance based on the real-time acquired capacitance value of the induction coil button. When C... 实时 -C 基准 >C 触摸阈值 When a finger touches the induction coil button, the induction coil button is determined to be in a triggered state, where C 实时 The capacitance value of the induction coil button, which is acquired in real time, is the second real-time capacitance value, C. 基准 As the reference capacitance value, C 触摸阈值 This is the preset threshold for the isolation capacitor.

[0042] Specifically, when the sensing mode is hybrid sensing, the second real-time capacitance value is acquired in real time after the range hood has been turned on for a first preset period of time; the second real-time capacitance value is subtracted from the reference capacitance value to obtain the real-time incremental capacitance value; when C 实时增量 >C 隔空阈值 When / 2, the timer starts; when C 实时增量 >C 隔空阈值 At that time, record the current first duration T1 and then continue timing; where C 实时增量 This represents the real-time incremental capacitance value; C 隔空阈值 The preset threshold for the isolation capacitor; if T 总 =T1×3 duration, and continuous C 实时增量 <C 隔空阈值 ×4 indicates that the induction coil button is in a contactless sensing trigger state; where T 总 Let T1 be the first duration, representing the total duration from the start of the timer to the present. 总 =T1×3 time period, when C 实时增量 ≥C 隔空阈值 When the value is ×4, record the current second duration T2 and continue timing. The second duration T2 is given by the formula T2 = T 总 - T1 is calculated; if T 总 =Within a duration of T1×5, and continuously C 实时增量 <C 隔空阈值 ×16, then the induction coil button is determined to be in the air-sensing trigger state; if T 总 =Within a time period of T1×5, when C 实时增量 ≥C 隔空阈值 When the value is ×16, the current third duration T3 is recorded. The third duration T3 is given by the formula T3 = T 总 - T2 is calculated; if T3 > T2, then the induction coil button is determined to be in the trigger state of contactless sensing; if T 总 >T 预设触发时长 If the induction coil button remains in the released state, then the induction coil button is determined to be in a touch-sensitive triggered state; where T 预设触发时长 The preset trigger duration; if C appears after the start of the timer... 实时增量 >C 触摸阈值 If so, the induction coil button is determined to be in a touch-sensitive trigger state.

[0043] It should be noted that the preset trigger duration can be set according to specific needs. The default is 1 second. The preset trigger duration is the time from the start of the timer until the current time point when the system has not been determined to be in a trigger state of air sensor.

[0044] It should be noted that on a range hood, the same button can be set to two functions. For example, the fan speed button: when triggered by the air sensor, it operates at low speed, and when triggered by the direct touch sensor, it operates at high speed. Similarly, the lighting button: when triggered by the air sensor, the lighting is dim, and when triggered by the direct touch sensor, the lighting is bright.

[0045] It should be noted that when the finger starts to approach from a distance, when C... 实时 -C 基准 >C 隔空阈值 At / 2, the timer begins, i.e., T_total; if the finger continues to approach, when C_total... 实时 -C 基准 >C 隔空阈值 Record the time T1 at this moment; at this moment, the finger stops approaching, and C does not appear within the time interval T1×3. 实时 -C 基准 >C 隔空阈值 In the case of ×4, it is determined to be the triggered state of the air sensor; if the finger continues to approach within the time interval T1×3, when C 实时 -C 基准 >C 隔空阈值 When the value is ×4, record the time at this moment as T2=T. 总 -T1; At this point, the finger stops approaching, and C does not appear within the time interval T1×5. 实时 -C 基准 >C 隔空阈值 In the case of ×16, it is determined to be the triggered state of the air sensor; if the finger continues to approach within the time T1×5, when C 实时 -C 基准 >C 隔空阈值 When the time is ×16, record the time at this moment as T3=T 总 -T2; When T3>T2, it indicates that the finger approach speed has significantly decreased, and it is determined to be a touch sensing trigger state; when T 总 >T 预设触发时长 If the induction coil button remains in the released state, then the induction coil button is determined to be in the touch-sensitive trigger state.

[0046] It should be noted that in hybrid sensing mode, from the start of the timer until the current time, if C occurs... 实时增量 >C 触摸阈值 If so, the induction coil button is determined to be in a touch-sensitive trigger state.

[0047] It is understandable that the method provided in this embodiment not only enables contactless control of all functions of the range hood, but also allows users to select a suitable sensing mode, further enhancing the user experience.

[0048] In practice, step S13, "determining whether to release the induction coil button based on the second real-time capacitance value and the reference capacitance value", includes: obtaining the real-time incremental capacitance value before the induction coil button is in the triggered state as the historical incremental capacitance value; taking the maximum value among the historical incremental capacitance values ​​as the maximum incremental capacitance value; multiplying the maximum incremental capacitance value by the first preset percentage to obtain the release capacitance threshold; and determining that the induction coil button is in the released state when the real-time incremental capacitance value is less than the release capacitance threshold.

[0049] It should be noted that the first preset percentage is set according to specific business requirements, and the default is 50%.

[0050] It should be noted that when the user's finger moves away from the induction coil button, the real-time capacitance value corresponding to the induction coil button decreases, and the real-time incremental capacitance value also decreases accordingly. When C 实时增量 <C 最大增量 When / 2, the induction coil button is determined to be in the released state, where C 实时增量 To implement the incremental capacitance value, C 最大增量 The maximum incremental capacitance value, and the capacitance release threshold is C. 最大增量 / 2.

[0051] It is understood that the technical solution provided in this embodiment can trigger or release the induction coil button by the real-time capacitance value change caused by the distance between the human hand and the induction coil button, thereby controlling the various functions of the range hood. It can realize non-contact control of all functions of the range hood and effectively improve the user experience.

[0052] In practice, the method also includes: updating the reference capacitance value according to the first formula after the induction coil button is in the released state. The first formula is: C` 基准 = C 基准 -C 最大增量 / 2; where C` 基准 For the updated reference capacitance value, C 基准 C is the reference capacitance value before the update. 最大增量 This represents the maximum incremental capacitance value.

[0053] It should be noted that, under certain circumstances, C 基准 The triggering and release of the induction coil button needs to be constantly updated according to changes in the surrounding environment in order to make the triggering or release more accurate. During the process of a finger approaching the induction coil button, C... 基准 It continues to increase, and C increases after the button is released. 基准 Possibly much larger than the C before the finger approached. 基准If a finger approaches the button again at this time, the button may not be triggered. Therefore, in a specific environment, when the induction coil button is determined to be in the released state, the reference capacitance value needs to be updated through the first formula. The aforementioned specific environment may change frequently due to factors such as the air humidity around the kitchen, which may cause the capacitance value of the induction coil button to change accordingly.

[0054] In practice, the method also includes: in the air-sensing mode, multiplying the preset air-sensing capacitance threshold by the second preset percentage to obtain the fast trigger capacitance threshold; when the induction coil button is in the released state and the real-time incremental capacitance value is detected to be greater than the fast trigger capacitance threshold within the third preset duration, the induction coil button is determined to be in the triggered state; the timing start point of the third preset duration is the time point at which the growth rate of the second real-time capacitance value is detected to be greater than the preset growth rate.

[0055] It should be noted that after the first preset duration ends, the growth rate of the second real-time capacitance value is calculated every preset growth rate duration. For example, if the preset growth rate duration is 0.1 seconds, the growth rate of the second real-time capacitance value is calculated within 0.1 seconds. If the growth rate is greater than the preset growth rate, the third preset duration begins to be counted. The preset growth rate is manually set based on multiple air-sensing simulation experiments.

[0056] It should be noted that the third preset duration and the second preset percentage can both be set according to specific business requirements. The third preset duration is 0.5 seconds by default, and the second preset percentage is 50% by default.

[0057] It should be noted that if a finger quickly approaches the induction coil button, due to the slight lag in the capacitance detection circuit, C... 实时 The increase may not be immediate, which would cause a delay before the button is triggered, resulting in a poor user experience. Therefore, when the induction coil button is in the released state and the increase in the second real-time capacitance value is greater than the preset increase, the timing begins, and C is detected within 0.5 seconds. 实时增量 >C 隔空阈值 If the value is / 2, it is determined that the finger is rapidly approaching, and the corresponding induction coil button is in a triggered state.

[0058] In practice, the method also includes: if the real-time incremental capacitance value of multiple induction coil buttons is greater than the preset isolation capacitance threshold, then the induction coil button with the largest real-time incremental capacitance value among the multiple induction coil buttons is set to the triggered state.

[0059] It should be noted that the glass panel of a range hood typically features multiple induction coil buttons arranged horizontally. Each induction coil button is controlled independently, and the capacitance value of the corresponding induction coil button is detected and processed independently. 实时 C 基准This method allows for the simultaneous detection of multiple induction coil buttons. When a finger approaches the glass panel, due to the close arrangement of the buttons, multiple buttons may be triggered simultaneously. In this case, which button's C value will be detected? 实时增量 If the maximum value is reached, the button is set to the triggered state, and the other buttons are set to the released state.

[0060] Please see Figure 2-4 , Figure 2 This is a schematic diagram of the structure of a range hood according to an exemplary embodiment of the present invention. Figure 3 This is a schematic diagram A illustrating the structure of a display operation panel assembly according to an exemplary embodiment of the present invention. Figure 4 This is a schematic diagram B illustrating the structure of a display operation panel assembly according to an exemplary embodiment of the present invention. See also... Figure 2-4 The range hood includes: a housing 1, an outer shell assembly 2, a glass panel 3, and a display control panel assembly 4; the bottom of the housing 1 is fixedly connected to the top of the outer shell assembly 2; the display control panel assembly 4 is provided on the inner side of the glass panel 3 of the outer shell assembly 2; the display control panel assembly 4 includes an upper shell 5, a lower shell 7, and a display control panel 6 inside the lower shell; the upper shell 5 is fixedly connected to the lower shell 7; the display control panel 6 is provided with multiple induction coil buttons 8; the upper shell 5 is provided with cutouts corresponding to the induction coil buttons 8; the upper shell 5 is fitted and fixed to the inner side of the glass panel 3.

[0061] It should be noted that the range hood also includes standard accessories such as a power board, a fan drive board, and a fan. The power board provides all the power, the fan drive board controls the fan speed, and the fan rotates to generate suction to remove cooking fumes. The display and control panel is responsible for user interaction, including functions such as power on / off, fan speed adjustment, lighting control, delayed shutdown, and automatic cleaning. Each function has a corresponding induction coil button. The induction coil button is connected to the capacitance detection port of the MCU on the display and control panel. The MCU can detect the real-time capacitance value of each induction coil button. The MCU can be a Cypress SC95FS5xx series or a Cypress CY8C4xx series.

[0062] Those skilled in the art will understand that all or part of the processes in the methods of the above embodiments can be implemented by a computer program instructing related hardware. The computer program can be stored in a non-volatile computer-readable storage medium, and when executed, it can include the processes of the embodiments of the above methods. Any references to memory, storage, databases, or other media used in the embodiments provided in this application can include non-volatile and / or volatile memory. Non-volatile memory can include read-only memory (ROM), programmable ROM (PROM), electrically programmable ROM (EPROM), electrically erasable programmable ROM (EEPROM), or flash memory. Volatile memory can include random access memory (RAM) or external cache memory. By way of illustration and not limitation, RAM is available in various forms, such as static RAM (SRAM), dynamic RAM (DRAM), synchronous DRAM (SDRAM), dual data rate SDRAM (DDRSDRAM), enhanced SDRAM (ESDRAM), synchronous link DRAM (SLDRAM), Rambus direct RAM (RDRAM), direct memory bus dynamic RAM (DRDRAM), and memory bus dynamic RAM (RDRAM), etc.

[0063] 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.

[0064] It should also be noted that the user information (including but not limited to user device information, user personal information, etc.) and data (including but not limited to data used for display, data used for analysis, etc.) involved in this application are all information and data authorized by the user or fully authorized by all parties.

[0065] 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.

[0066] 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.

[0067] 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 sensing control method for a range hood, characterized in that, The range hood includes a display control panel assembly; the display control panel assembly is provided with multiple induction coil buttons; the method includes: The reference capacitance value is obtained based on the first real-time capacitance value; the first real-time capacitance value is the capacitance value of the induction coil button obtained in real time within a first preset time after the range hood is turned on. Whether to trigger the induction coil button is determined based on the sensing mode, the second real-time capacitance value, the reference capacitance value, and the preset air-to-ground capacitance threshold; the second real-time capacitance value is the capacitance value of the induction coil button obtained in real time after the range hood is turned on and a first preset time has elapsed; the sensing mode includes air-to-ground sensing, touch sensing, and hybrid sensing. Whether to release the induction coil button is determined based on the second real-time capacitance value and the reference capacitance value.

2. The method according to claim 1, characterized in that, The process of obtaining the reference capacitance value based on the first real-time capacitance value includes: Divide the first preset duration into a preset number of time periods; The first real-time capacitance value is obtained once every second preset time interval during the time period to obtain the time period capacitance value group corresponding to the time period. After removing the maximum and minimum values ​​from the time period capacitance value group, the average of the remaining time period capacitance values ​​is taken as the time period capacitance value. The average of the capacitance values ​​of the preset number of time periods is used as the reference capacitance value.

3. The method according to claim 1, characterized in that, The step of determining whether to trigger the induction coil button based on the sensing mode, the second real-time capacitance value, the reference capacitance value, and the preset isolation capacitance threshold includes: When the sensing mode is air-sensing, the second real-time capacitance value is acquired in real time after the range hood is turned on for a first preset time. Subtracting the reference capacitance value from the second real-time capacitance value yields the real-time incremental capacitance value. When C 实时增量 > C 隔空阈值 , it is determined that the induction coil button is in a triggered state; wherein C 实时增量 is a real-time incremental capacitance value; and C 隔空阈值 is a preset air-gap capacitance threshold value.

4. The method according to claim 1, characterized in that, The step of determining whether to trigger the induction coil button based on the sensing mode, the second real-time capacitance value, the reference capacitance value, and the preset isolation capacitance threshold includes: When the sensing mode is touch sensing, the second real-time capacitance value is acquired in real time after the range hood is turned on for a first preset time. Subtracting the reference capacitance value from the second real-time capacitance value yields the real-time incremental capacitance value. When C 实时增量 > C 触摸阈值 , it is determined that the induction coil button is in a trigger state, wherein C 实时增量 is a real-time incremental capacitance value; and C 触摸阈值 is a preset touch capacitance threshold.

5. The method according to claim 1, characterized in that, The step of determining whether to trigger the induction coil button based on the sensing mode, the second real-time capacitance value, the reference capacitance value, and the preset isolation capacitance threshold includes: When the sensing mode is hybrid sensing, the second real-time capacitance value is acquired in real time after the range hood is turned on for a first preset time. Subtracting the reference capacitance value from the second real-time capacitance value yields the real-time incremental capacitance value. When C 实时增量 > C 隔空阈值 / 2, start timing; When C 实时增量 > C 隔空阈值 , record the current first duration T1 and continue timing; wherein, C 实时增量 is a real-time incremental capacitance value; C 隔空阈值 is a preset air gap capacitance threshold value; If T 总 =T1×3, and C 实时增量 <C 隔空阈值 ×4, it is determined that the induction coil button is in the trigger state of the air induction; wherein, T 总 is the total time from the start of timing to now, and T1 is the first time. If T 总 =T1×3 time period, when C 实时增量 ≥C 隔空阈值 When the value is ×4, record the current second duration T2 and continue timing. The second duration T2 is given by the formula T2 = T 总 - T1 is calculated; if T 总 =Within a duration of T1×5, and continuously C 实时增量 <C 隔空阈值 ×16, then the induction coil button is determined to be in the air-sensing trigger state; if T 总 =Within a time period of T1×5, when C 实时增量 ≥C 隔空阈值 When the value is ×16, the current third duration T3 is recorded. The third duration T3 is given by the formula T3 = T 总 - T2 is calculated; if T3 > T2, then the induction coil button is determined to be in the trigger state of contactless sensing; if T 总 >T 预设触发时长 If the induction coil button remains in the released state, then the induction coil button is determined to be in a touch-sensitive triggered state; where T 预设触发时长 Preset trigger duration; If C appears after the start of the timer... 实时增量 >C 触摸阈值 If so, the induction coil button is determined to be in a touch-sensitive trigger state.

6. The method according to any one of claims 3-5, characterized in that, The step of determining whether to release the induction coil button based on the second real-time capacitance value and the reference capacitance value includes: The real-time incremental capacitance value before the induction coil button is in the triggered state is obtained as the historical incremental capacitance value. The maximum value among the historical incremental capacitance values ​​is taken as the maximum incremental capacitance value; Multiply the maximum incremental capacitance value by a first preset percentage to obtain the release capacitance threshold; When the real-time incremental capacitance value is less than the release capacitance threshold, the induction coil button is determined to be in the released state.

7. The method according to claim 6, characterized in that, The method further includes: After the induction coil button is in the released state, the reference capacitance value is updated according to the first formula, which is: C` 基准 = C 基准 -C 最大增量 / 2; Among them, C` 基准 For the updated reference capacitance value, C 基准 C is the reference capacitance value before the update. 最大增量 This represents the maximum incremental capacitance value.

8. The method according to claim 3, characterized in that, The method further includes: Multiply the preset isolation capacitor threshold by the second preset percentage to obtain the fast trigger capacitor threshold; When the induction coil button is in the released state and the real-time incremental capacitance value is detected to be greater than the fast trigger capacitance threshold within the third preset time period, the induction coil button is determined to be in the triggered state; the timing start point of the third preset time period is the time point at which the growth rate of the second real-time capacitance value is detected to be greater than the preset growth rate.

9. The method according to any one of claims 3-5, characterized in that, The method further includes: If the real-time incremental capacitance value of multiple induction coil buttons is greater than the preset isolation capacitance threshold, then the induction coil button with the largest real-time incremental capacitance value among the multiple induction coil buttons will be set to the triggered state.

10. A range hood, characterized in that, The range hood employs the air-sensing control method for any of the range hoods described in claims 1-9, and the range hood comprises: The enclosure (1), the outer shell assembly (2), the glass panel (3), and the display and operation panel assembly (4); The bottom of the housing (1) is fixedly connected to the top of the outer shell assembly (2); The display operation panel assembly (4) is provided inside the glass panel (3) of the outer casing assembly (2). The display operation panel assembly (4) includes an upper shell (5), a lower shell (7), and a display operation panel (6) inside the lower shell; the upper shell (5) and the lower shell (7) are fixedly connected; the display operation panel (6) is provided with a plurality of induction coil buttons (8); the upper shell (5) is provided with a cutout corresponding to the induction coil buttons (8); The upper shell (5) is attached and fixed to the inner side of the glass panel (3).

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