Power supply control method, knob assembly and linkage system

Abstract

The invention provides a power supply control method, a knob assembly and a linkage system, and the method comprises the steps: responding to a received first trigger signal, and entering a power-on state; wherein the first trigger signal is used for establishing a power supply loop between the power supply unit and the control unit; acquiring a real-time detection signal in a power-on state; the real-time detection signal is used for representing the rotation state of the knob; if the real-time detection signal meets a preset first logic condition, outputting a latch signal to a power latch circuit so as to maintain the conduction state of the power supply loop after the first trigger signal is ended; and when the conduction state is maintained, if the real-time detection signal meets a preset second logic condition, stopping outputting the latch signal to the power supply latch circuit so as to disconnect the power supply loop and enter a power-off state. In the mode, the knob assembly can be powered on when being pressed by a user, intelligently keep power supply when the kitchen electric equipment is identified to be in a power-on state, and automatically cut off power when the operation is finished, so that the power consumption of the knob assembly is reduced.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of smart home, in particular to a power supply control method, a knob assembly and a linkage system. BACKGROUND

[0002] In the field of smart home, smart knob assemblies with communication functions are increasingly applied to kitchen electrical products to realize intelligent linkage between, for example, a cooktop and a range hood. In order to facilitate retrofitting and adaptation to different kitchen electrical equipment, such smart knob assemblies usually adopt a battery as an internal power supply unit.

[0003] In order to prolong the service life of the battery, the existing smart knob assemblies usually adopt a low-power standby scheme. For example, the control unit inside the knob will enter a sleep mode when idle, and periodically wake up or detect whether the state of the knob has changed through an external interrupt. However, this low-power sleep mode still needs to maintain the basic operation of the control unit and related peripherals.

[0004] Therefore, this long-time standby or periodic wake-up mechanism inevitably continues to consume static current, resulting in limited overall standby time of the knob assembly, which brings inconvenience to the user that the battery needs to be frequently replaced. SUMMARY

[0005] Therefore, the purpose of the present application is to provide a power supply control method, a knob assembly and a linkage system, which can be powered on when the user presses, maintain power supply when identifying that the kitchen electrical equipment is in a powered-on state, and automatically power off when the operation ends, thereby reducing the power consumption of the knob assembly, improving the response capability of the knob assembly, and expanding the universality and adaptability of the knob assembly.

[0006] In a first aspect, the present application provides a power supply control method applied to a knob assembly, the knob assembly comprising a knob, the knob comprising a power supply unit, a control unit and a power supply latch circuit, the control unit being configured to execute the method, comprising: In response to a received first trigger signal, entering a powered-on state; wherein the first trigger signal is used to establish a power supply loop between the power supply unit and the control unit.

[0007] In the powered-on state, obtaining a real-time detection signal; the real-time detection signal is used to represent the rotation state of the knob.

[0008] If the real-time detection signal meets a preset first logic condition, outputting a latch signal to the power supply latch circuit to maintain the conduction state of the power supply loop after the first trigger signal ends.

[0009] During the period when the conduction state is maintained, if the real-time detection signal meets a preset second logic condition, stop outputting the latch signal to the power supply latch circuit to disconnect the power supply loop and enter a powered-off state.

[0010] In an alternative implementation, the first trigger signal is generated in response to a physical pressing operation on the knob.

[0011] In an optional implementation, the step of detecting that the knob assembly satisfies a preset first logic condition includes: If the real-time detection signal corresponds to a preset open state area, it is determined that the real-time detection signal satisfies the preset first logic condition.

[0012] In an optional implementation, the step of detecting that the real-time detection signal satisfies a preset second logic condition includes: If the real-time detection signal corresponds to a preset off state region, it is determined that the real-time detection signal satisfies the preset second logic condition.

[0013] In an optional embodiment, the knob further includes a sensing unit; the knob assembly further includes a reflective element; the sensing unit and the reflective element are used in conjunction; the reflective element is provided with a first reflective area corresponding to a preset open state area and a second reflective area corresponding to a preset closed state area.

[0014] The steps for acquiring real-time detection signals include: The real-time detection signal generated by the reflection from the first or second reflection area is obtained from the sensing unit.

[0015] In an optional embodiment, the knob further includes a communication unit; the knob establishes a communication connection with an external device through the communication unit; the method further includes: During the conduction state, in response to the reflected signal received by the sensing unit, the operating state determined by the real-time detection signal is sent to the external device through the communication unit so that the external device can respond to the operating state.

[0016] Secondly, this application provides a knob assembly, including a knob; the knob includes a power supply unit, a control unit, and a power latching circuit; the control unit is configured to execute the power supply control method of any of the foregoing embodiments; the power latching circuit is connected between the power supply unit and the control unit.

[0017] In an optional embodiment, the knob is internally provided with an actuation unit; the actuation unit is configured to generate a first trigger signal for closing the power latch circuit in response to a first trigger event; wherein the first trigger event is a physical pressing operation on the knob.

[0018] In an optional embodiment, the knob further includes a sensing unit and a communication unit; the knob assembly also includes a reflective element; the sensing unit works in conjunction with the reflective element; the knob establishes a communication connection with an external device through the communication unit.

[0019] The sensing unit is used to generate a real-time detection signal characterizing the rotation state of the knob, so that the control unit can determine whether the first logic condition and the second logic condition are met.

[0020] The control unit is used to send the operating status determined by real-time detection signals to external devices via a communication unit, so that the external devices can respond to the operating status.

[0021] Thirdly, this application provides a linkage system, including: a knob assembly according to any of the foregoing embodiments; and an external device configured to receive the operating status sent by the knob assembly and respond accordingly.

[0022] This application provides a power supply control method, a knob assembly, and a linkage system. By employing a power latch circuit in conjunction with a control mechanism that combines physical press-triggered power-on with rotation state logic-based power supply maintenance, after establishing an initial power supply circuit in response to physical press, a latch signal is only output to maintain power supply when the knob is detected to be in the open state region. When the knob is detected to have returned to the closed state region, the output of the latch signal is actively stopped to physically disconnect the power supply circuit. This allows the knob assembly to enter a completely power-off state during non-operation periods. In this way, while ensuring that the knob can normally detect its operating status and perform real-time wireless linkage with external devices, the static current consumption during standby is eliminated, extending the service life of the power supply unit.

[0023] Other features and advantages of this application will be set forth in the following description and will be apparent in part from the description or may be learned by practicing the application. The objectives and other advantages of this application are realized and obtained through the structures particularly pointed out in the description, claims and drawings.

[0024] To make the above-mentioned objectives, features and advantages of this application more apparent and understandable, preferred embodiments are described below in detail with reference to the accompanying drawings. Attached Figure Description

[0025] To more clearly illustrate the technical solutions in the specific embodiments of this application or the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this application. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0026] Figure 1 A flowchart of the power supply control method provided in the embodiments of this application; Figure 2 A schematic diagram of the knob assembly provided in the embodiments of this application; Figure 3This is a schematic diagram of the internal structure of the knob assembly provided in the embodiments of this application; Figure 4 This is a schematic diagram of the circuit board and base plate provided in an embodiment of this application; Figure 5 A schematic diagram of a power latch circuit provided in an embodiment of this application; Figure 6 This is a schematic diagram of the internal structure of the actuation unit provided in an embodiment of this application; Figure 7 A side view of the knob assembly provided in an embodiment of this application; Figure 8 This is a schematic diagram of the linkage system provided in an embodiment of this application.

[0027] Icons: 1-Knob; 2-Reflector; 3-Power supply unit; 4-First device; 5-Valve stem; 6-Knob housing; 7-Base plate; 8-Circuit board; 9-Actuation unit; 10-Communication unit; 11-Sensing unit; 12-Through hole; 13-Knob assembly; 14-External device. Detailed Implementation

[0028] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0029] To help those skilled in the art better understand this application, the application scenarios and design concepts of this application are briefly introduced below.

[0030] In the field of kitchen appliance control, with the increasing demand for intelligent features, more and more battery-powered control devices (such as independently installed electronic switches, remote controls, or retrofitted controllers) are being used to achieve wireless linkage between devices. For these devices that cannot be connected to mains power, battery life is a key factor determining the user experience.

[0031] Currently, to extend battery life, conventional power management solutions typically employ low-power sleep modes. This means that the device's internal control chip enters a sleep state when not in operation, with only the interrupt wake-up circuit remaining active to respond to user input. However, this approach has an unavoidable technical problem: to maintain the wake-up function, a small quiescent current must always exist in the circuit. This means that even when the device is completely idle, battery power will continue to decrease due to quiescent current. For applications with low usage frequency or extremely long standby times, this quiescent current loss is often the main cause of battery depletion, necessitating periodic battery replacements and resulting in high maintenance costs.

[0032] Based on this, this application provides a power supply control method, a knob assembly, and a linkage system. Based on a power supply architecture combining physical triggering and electronic latching, in the non-operating state, the circuit loop between the power supply unit and the control unit is physically disconnected or completely shut off, rather than in a traditional sleep mode. This means that during standby, the system consumes almost no power, completely eliminating static current loss and thus reserving battery energy entirely for effective operation. Simultaneously, this application utilizes the instantaneous signal generated by the physical pressing action as the system's cold start trigger source. After power-on, the control unit logically determines whether to maintain power supply based on the detected rotation state. Once the operation is detected as finished, the control unit actively disconnects the latching circuit, returning the system to a completely power-off state, thereby extending battery life.

[0033] To facilitate understanding of this embodiment, the embodiments of this application will be described in detail below.

[0034] This application provides a power supply control method applied to a knob assembly. The knob assembly includes a knob, which includes a power supply unit, a control unit, and a power latching circuit. The control unit is used to execute the method.

[0035] Here, the knob assembly is a universal, independently detachable modular accessory that enables low-cost intelligent upgrades to existing home appliances. The knob is rotatably mounted on the first device 4 (such as a cooktop).

[0036] Specifically, a standardized connection interface is located at the bottom of the knob. The geometry and dimensions of the connection interface are designed according to the standards of the connection rods (i.e., gas valve rods) of mainstream cooktops on the market, such as being compatible with common D-type shafts, double-cut-edge shafts, or spline shaft structures. To accommodate different diameter tolerances of the connection rods, a flexible metal sheet or an adaptive plastic retaining rib can also be integrated inside the connection interface.

[0037] Based on this universal design, the knob assembly of this application can directly replace the original ordinary mechanical knobs on the stove. During installation, users do not need to disassemble the stove body, nor do they need to modify the gas pipeline or original circuit inside the stove. Users only need to pull out the original ordinary knob axially, and then push in the knob provided in this embodiment, aligning it with the connecting rod, to complete the physical installation. This allows traditional stoves that originally lacked communication and detection functions to acquire intelligent power supply capabilities based on physical press triggering and logic self-locking, as well as the ability to link with external devices, simply by replacing an external knob component, thus lowering the threshold and modification cost for users to experience smart home technology.

[0038] The power supply unit is used to provide electrical energy, preferably a button cell battery or other miniature battery, to suit wireless application scenarios.

[0039] The control unit is typically a microcontroller or a logic processing chip.

[0040] The power latch circuit is connected between the power supply unit and the power input terminal of the control unit. The power latch circuit is equivalent to an electronic switch controlled by an electronic signal. It can be constructed from electronic switching elements such as MOSFETs (e.g., PMOS or NMOS), transistors, or relays. Its function is to determine the on / off state of the power supply circuit based on the control signal.

[0041] Reference Figure 1 The methods include: Step S101: In response to the received first trigger signal, enter the power-on state; wherein, the first trigger signal is used to establish a power supply circuit between the power supply unit and the control unit.

[0042] Here, in the initial state, the knob assembly is in a completely de-energized state, that is, the power supply circuit is disconnected, and the static current is theoretically zero.

[0043] The initial trigger signal typically originates from a user's physical operation. In a preferred embodiment, the knob assembly contains an actuation unit (such as a mechanical tactile switch or micro switch). The actuation unit is connected in parallel across the power latch circuit or in a path that triggers power conduction. When the user physically presses the knob, the actuation unit closes, physically bypassing the inactive power latch circuit, or generating a pulse signal to forcibly activate the power supply circuit.

[0044] At this point, current from the power supply unit flows to the control unit through the closed actuator (or the triggered closed circuit). The control unit receives voltage, completes initialization and reset, and thus enters the power-on state. At this time, as long as the user continues to press, or the trigger signal remains, the control unit will function normally.

[0045] Step S102: Under the power-on state, acquire the real-time detection signal; the real-time detection signal is used to characterize the rotation state of the knob.

[0046] Here, after the control unit is powered on, it drives the sensor inside the knob to work. In a preferred embodiment, the sensor is a sensing unit that works in conjunction with an external reflective element. The sensing unit detects the reflected signal from the reflective element and converts it into an electrical signal, which is then transmitted to the control unit. This electrical signal is the real-time detection signal, which indicates the current rotation state of the knob (e.g., whether it is in the off position or has been rotated to the ignition position).

[0047] In addition to infrared sensing, in other feasible embodiments, the real-time detection signal can also come from the Hall sensor's detection of the magnetic field, or the potentiometer's detection of the resistance value, as long as it can reflect the knob position.

[0048] Step S103: If the real-time detection signal meets the preset first logic condition, output a latch signal to the power supply latch circuit to maintain the conduction state of the power supply circuit after the first trigger signal ends.

[0049] Here, the preset first logic condition is usually defined as the knob being in the working area or the knob being in the on state. For example, if the detection signal shows that the knob has deviated from the initial zero position (i.e., the user pressed and rotated the knob to ignite), then the first logic condition is determined to be met.

[0050] Once the conditions are met, the control unit immediately outputs a valid latch signal (e.g., a continuous high or low level, depending on the latch circuit design) through its I / O (input / output) pin. This latch signal is transmitted to the control terminal of the power latch circuit. Upon receiving this signal, the power latch circuit is locked in the ON state.

[0051] At this point, even if the first trigger signal ends (for example, the user releases their hand and stops pressing the knob, and the mechanical switch is turned off), the circuit between the power supply unit and the control unit remains connected because the power latching circuit has already established a parallel electronic power supply path.

[0052] In step S104, if the real-time detection signal meets the preset second logic condition during the conduction state, the output latch signal to the power latch circuit is stopped to disconnect the power supply circuit and enter the power-off state.

[0053] Here, the preset second logic condition is usually defined as the knob returning to its initial position or the knob being in the off state. When the user finishes cooking and turns the knob back to the zero position to turn off the heat, the real-time detection signal changes (e.g., the reflected signal weakens or disappears), thus satisfying the second logic condition.

[0054] At this point, the control unit determines that the task is over and performs a power-off operation, that is, cancels or stops the output of the latched signal before (for example, toggles the I / O pin level or sets it to a high impedance state).

[0055] Without the latch signal, the power latch circuit (electronic switch) is cut off. Since the user's pressing operation has already ended (the mechanical path is broken), the entire power supply circuit is completely cut off. The control unit then loses power and enters a completely power-off state, ensuring that the knob assembly does not consume any battery power during non-operational periods, achieving true zero-power standby.

[0056] In one embodiment, the first trigger signal is generated in response to a physical pressing operation on the knob.

[0057] In the conventional operating logic of a gas stove, the user typically needs to press down on the knob to deactivate the child lock or activate the igniter before lighting the stove. This inherent mechanical action serves as the trigger source for waking the knob assembly from its zero-power state.

[0058] Specifically, the knob assembly contains an actuation unit, such as a mechanical microswitch, a metal spring, or a conductive contact. The actuation unit is connected in parallel with the power latch circuit, or connected to a power supply path that bypasses the power latch circuit. When the knob is in its natural state (not pressed), the actuation unit is in the off state, and the power supply circuit is cut off. When the user applies axial physical pressure to the knob, the knob body sinks and actuates the actuation unit, closing it.

[0059] The closing of the actuation unit physically connects the power supply unit and the control unit, allowing current to bypass the inactive power latching circuit and flow directly to the control unit. The voltage or current signal generated at this instant constitutes the first trigger signal. The first trigger signal provides the control unit with the initial electrical energy required for cold start, resetting it from a completely power-off state and initiating the initialization program. As long as the physical pressing operation continues, this mechanical path remains open, ensuring that the control unit has sufficient time to complete the power-on self-test and determine whether power latching is required.

[0060] In one embodiment, step S103, detecting that the knob assembly satisfies a preset first logic condition, includes: If the real-time detection signal corresponds to a preset open state area, it is determined that the real-time detection signal satisfies the preset first logic condition.

[0061] Here, the preset on / off state area logically corresponds to the effective working stroke of the stove. For example, the angle range from when the knob is pressed and rotated to the zero position until the maximum and minimum power levels are covered is defined as the on / off state area.

[0062] After the control unit is powered on, it immediately reads the current real-time detection signal through the sensor.

[0063] If the characteristic value of the detected signal (such as voltage amplitude or digital code) falls within the value range of the pre-stored on state area, the control unit determines that the user's intention is to "start cooking".

[0064] At this point, the first logical condition is met, and the control unit immediately outputs an electronic latch signal to take over the power control. This ensures that when the user finishes igniting and releases their hand, that is, after the physical pressing ends and the mechanical circuit is disconnected, the circuit can still be kept on through electronic latch because the knob has been turned to the working angle. This ensures that the knob assembly can continue to work in the subsequent cooking process, such as real-time monitoring of heat changes or sending linkage signals.

[0065] In one embodiment, step S104, which involves detecting that the real-time detection signal satisfies a preset second logic condition, includes: If the real-time detection signal corresponds to a preset off state region, it is determined that the real-time detection signal satisfies the preset second logic condition.

[0066] Here, the preset off state area logically corresponds to the stove's stopped working position, typically the initial zero position of the knob or the flame-off position. In this area, the stove's gas valve is closed, and there is no flame output.

[0067] During the operation of maintaining power supply, the control unit continuously monitors changes in the real-time detection signal. When the user finishes cooking and rotates the knob back to the zero position, the signal characteristic value collected by the sensor will change and fall into the value range of the pre-stored off state area (for example, the sensing unit detects that the reflectivity of the reflective element changes from high to low, or detects a specific return magnetic field signal).

[0068] Once the confirmation signal enters the off state region, the control unit determines that the user's intention is to "end cooking." At this point, the second logical condition is met. To prevent unnecessary power loss, the control unit executes a power-off strategy, that is, actively cancels or stops the output latch signal. As the latch signal disappears, the power latch circuit disconnects. Since the user has not pressed the knob at this time (the mechanical path is also disconnected), the entire knob completely loses power and returns to a completely power-off state with zero quiescent current.

[0069] In one embodiment, the knob further includes a sensing unit; the knob assembly further includes a reflective element; the sensing unit and the reflective element are used in conjunction; the reflective element is provided with a first reflective area corresponding to a preset open state area and a second reflective area corresponding to a preset closed state area.

[0070] Here, a sensing unit is installed inside the knob, and the knob assembly also includes an external reflective element. The sensing unit and the reflective element work together to form a non-contact status detection system. The sensing unit typically includes a transmitting subunit (such as an infrared emitter) and a receiving subunit (such as an infrared receiver), both arranged side-by-side with their working surfaces facing downwards from the knob. The reflective element is fixed to the cooktop panel, located directly below the knob.

[0071] To distinguish different rotational positions, the surface of the reflective element is physically divided into regions with different optical properties, specifically including a first reflection region and a second reflection region.

[0072] The first reflective zone corresponds to the preset on / off state area. This means that when the knob is rotated to the ignition or firepower adjustment position, the sensing unit is positioned over this area. The surface of the first reflective zone is coated with a highly reflective material, such as a white or silver coating, or has a specific microstructure that can efficiently reflect the detection beam.

[0073] The second reflective zone corresponds to the preset off state area. This means that when the knob is in the initial zero position or the fire-off position, the sensing unit is directly over this area. The surface of the second reflective zone is coated with a low-reflectivity material, such as a black light-absorbing coating, or has a matte finish, resulting in extremely weak reflection of the detection beam.

[0074] Step S102, the step of acquiring the real-time detection signal, includes: The real-time detection signal generated by the reflection from the first or second reflection area is obtained from the sensing unit.

[0075] Here, the control unit drives the sensing unit to work and obtains the real-time detection signal generated by the reflection of the first or second reflection area from the sensing unit.

[0076] When the user presses and rotates the knob to the working angle, the light beam emitted by the sensing unit shines on the first reflection area, producing strong reflected light. The sensing unit receives this strong light and converts it into a high-level or high-voltage electrical signal. After the control unit recognizes the signal, it determines that the first logic condition for maintaining power supply is met, and thus outputs a latch signal.

[0077] When the user rotates the knob back to zero, the beam of light emitted by the sensing unit moves to the second reflection area, and the reflected light decreases sharply. The sensing unit outputs a low-level or low-voltage electrical signal. After the control unit recognizes this signal, it determines that the second logic condition for power-off is met, thereby canceling the latch signal.

[0078] In one embodiment, the knob further includes a communication unit; the knob establishes a communication connection with an external device through the communication unit.

[0079] The knob also integrates a communication unit, such as a Bluetooth Low Energy module, a ZigBee module, or an RF transmitter module. The knob establishes a communication connection with external devices (such as range hoods, integrated cooktops, or smart home gateways) through this unit.

[0080] The method also includes: During the conduction state, in response to the reflected signal received by the sensing unit, the operating state determined by the real-time detection signal is sent to the external device through the communication unit so that the external device can respond to the operating state.

[0081] Here, during the period when the conduction state is maintained, that is, during the time when the power latch circuit is closed and the control unit is working normally, the control unit performs the linkage control task.

[0082] Specifically, once the control unit confirms the knob is in the "on" position via a detection signal and latches the power, data transmission begins. The control unit encodes the "stove is on" or specific "power level" information into a data packet and drives the communication unit to transmit it. Upon receiving the signal, external devices automatically start the fan or adjust operating parameters.

[0083] Similarly, when the control unit detects a "stove is off" signal, within a very short time window before executing the power-off operation, the control unit will prioritize sending a "stove is off" command via the communication unit. The external device receives the command and executes the shutdown logic. After the data transmission is complete, the control unit then stops outputting the latch signal and cuts off its own power supply, thus ensuring that the knob assembly, while possessing extreme energy-saving characteristics, can fully and reliably achieve the intelligent linkage function between the range hood and stove.

[0084] Based on the above embodiments, this application provides a knob assembly, referring to... Figure 2 and Figure 3 The knob assembly provided in this application includes a knob 1; the knob 1 includes a power supply unit 3, a control unit (not shown in the figure) and a power latch circuit (not shown in the figure); the control unit is configured to execute the power supply control method of any of the above-described embodiments; the power latch circuit is connected between the power supply unit 3 and the control unit.

[0085] Here, refer to Figure 3 and Figure 4 The knob 1, as the main body of the component, includes a knob housing 6 and a base plate 7. The knob housing 6 and the base plate 7 are fixedly connected by means of snaps, screws or adhesives, forming a closed internal cavity that provides physical protection and an oil-proof environment for the internal precision electronic components.

[0086] In order to achieve a direct replacement of existing stoves, refer to Figure 4The bottom of knob 1 (usually located at the center of base plate 7) has a standardized connection interface. The shape and size of the connection interface are adapted to the flow regulating valve stem 5 of mainstream cooktops on the market, for example, designed to be compatible with D-type shafts, double-cut-edge shafts, or spline shafts. An elastic metal sheet or self-adaptive retaining rib can be integrated inside the connection interface to eliminate assembly gaps. Users do not need to modify the internal structure of the cooktop; they only need to remove the original knob 1 and insert the knob 1 of this embodiment into the valve stem 5 to complete the mechanical installation.

[0087] Reference Figure 2 A circuit board 8 is installed inside the receiving cavity of the knob 1. The circuit board 8 integrates a power supply unit 3, a control unit, and a power latching circuit.

[0088] The power supply unit 3 is used to provide electrical energy. Considering the wireless and independent nature of the knob 1, the power supply unit 3 is preferably a small button battery.

[0089] The power latch circuit is connected between the power supply unit 3 and the power input terminal of the control unit, and acts as a controllable electronic switch.

[0090] In a specific circuit implementation, the power latch circuit may include electronic switching elements, such as field-effect transistors (MOSFETs, such as PMOS or NMOS), bipolar transistors, or solid-state relays. The electronic switching element is connected in series in the main circuit of the power supply loop. Its control terminal is electrically connected to the signal output pin of the control unit to receive the latch signal from the control unit. In a specific embodiment, the power latch circuit is as follows: Figure 5 As shown.

[0091] When a valid latch signal is received, the electronic switch element is turned on to maintain the power supply circuit; when the latch signal is withdrawn, the electronic switch element is turned off to cut off the power supply circuit.

[0092] The control unit is typically a low-power microcontroller. After power-on reset, it determines whether to output a latching signal to maintain its own power supply based on the sensor status, and stops outputting signals to cut off its own power supply after the operation is completed.

[0093] In one embodiment, the knob 1 is provided with an actuation unit 9; the actuation unit 9 is configured to generate a first trigger signal for closing the power latch circuit in response to a first trigger event; wherein the first trigger event is a physical pressing operation on the knob 1.

[0094] In one embodiment, reference is made to Figure 3 The knob 1 also contains an actuation unit 9. The actuation unit 9 is configured to respond to a first trigger event (i.e., a physical pressing operation on the knob 1).

[0095] Structurally, the actuation unit 9 is preferably a mechanical tactile switch, a micro switch, or a metal spring switch. The actuation unit 9 is installed at the bottom of the circuit board 8 or above the connection interface, in a position that can sense the axial displacement of the knob 1. The actuation unit 9 has the same shape as the knob 1 lever, and contains a spring and contact points. When pressed, it can be reduced in size. When pressed to the bottom, the internal contact points make contact with the bottom. After contact, the internal circuit is connected, and the bottom is grounded, and the contact points are connected to the circuit board 8.

[0096] In terms of circuit connection, the actuation unit 9 is connected between the power supply unit 3 and the control unit, and forms a specific logical relationship with the power latch circuit (e.g., parallel relationship, or the actuation unit 9 as the trigger end of the power latch circuit).

[0097] When the user presses down on knob 1, knob 1 generates axial displacement, pressing the actuator unit 9 and causing it to close. The moment the actuator unit 9 closes, an initial physical power supply path is established, or a pulse trigger signal is generated, allowing the current of the power supply unit 3 to bypass the power latch circuit that is not yet turned on (or trigger its turn on) and flow directly to the control unit, thereby enabling the control unit to obtain initial power and start.

[0098] The internal structure of the actuation unit 9 is as follows: Figure 6 As shown.

[0099] In one specific embodiment, refer to Figure 5 The power latch circuit is mainly composed of a P-channel MOSFET, an NPN transistor, and their surrounding resistors and capacitors.

[0100] The MOSFET acts as the main switch, with its source (S) connected to the positive terminal VBAT of power supply unit 3, and its drain (D) connected to the input terminal VCC of the back-end boost / regulator circuit, which in turn connects to the power input terminal of the control unit.

[0101] The transistor is used as an auxiliary drive switch, with its collector C connected to the gate G of the MOSFET and its emitter E grounded to GND.

[0102] Reference Figure 6 One end of the actuation unit 9 is connected to the SW_L node in the circuit diagram, and the other end is connected to ground (GND). The SW_L node is connected to the gate G of the MOSFET through a diode or resistor network.

[0103] One of the GPIO pins of the control unit is connected to the base B of the transistor via a current-limiting resistor.

[0104] The actual work process is as follows: Triggering the power-on phase: The user applies physical pressure to knob 1. Actuation unit 9 is compressed and closed, connecting node SW_L to ground. The voltage at node SW_L instantly drops to zero, directly pulling the gate G level of the MOSFET low. The MOSFET then conducts, and the current from power supply unit 3 flows through the MOSFET to the downstream capacitor and boost circuit. The control unit receives voltage and completes power-on reset, starting operation. The low-level signal generated at this time is the first trigger signal.

[0105] Self-locking phase: After the control unit is powered on, it immediately obtains the position of knob 1 through the sensing unit 11 (real-time detection signal). If knob 1 is rotated to the working area (satisfying the first logic condition).

[0106] The control unit outputs a valid latch signal through its pin (according to the characteristics of the NPN transistor in the diagram, a high level should be output here to turn on the transistor).

[0107] The transistor is turned on, pulling its collector C low to ground potential. Since the collector is connected to the gate G of the MOSFET, this keeps the gate of the MOSFET continuously pulled low.

[0108] At this point, even if the user releases their hand and the actuator 9 disconnects (SW_L returns to floating), the MOSFET remains on because the transistor pulls the gate of the MOSFET, and the power supply circuit is latched and continues to work normally.

[0109] Power outage phase: The user rotates knob 1 back to its original position (satisfying the second logic condition).

[0110] The control unit detects that knob 1 has returned to its original position and determines that the operation is complete. The control unit stops outputting the latch signal, that is, the pin is set to an invalid level, which should be low level according to the NPN characteristics.

[0111] When the transistor is turned off, the gate G of the MOSFET loses its pull-down path and is pulled back to a high level VBAT through the pull-up resistor. The MOSFET then turns off.

[0112] When the power supply circuit is cut off and the power of the back-end capacitor is exhausted, the control unit loses power, and the entire knob 1 enters a zero-power-consumption power-off state.

[0113] In one embodiment, reference is made to Figure 3 and Figure 6 The knob 1 also includes a sensing unit 11 and a communication unit 10; the knob assembly 13 also includes a reflective element 2; the sensing unit 11 and the reflective element 2 are used in conjunction; the knob 1 establishes a communication connection with the external device 14 through the communication unit 10.

[0114] The sensing unit 11 is used to generate a real-time detection signal characterizing the rotation state of the knob 1, so that the control unit can determine whether the first logic condition and the second logic condition are met.

[0115] The control unit is used to send the operating status determined by the real-time detection signal to the external device 14 through the communication unit 10, so that the external device 14 can respond to the operating status.

[0116] Here, the knob 1 also integrates a sensing unit 11 and a communication unit 10, and the knob assembly 13 is also equipped with a reflective element 2.

[0117] Reference Figure 2 The reflective element 2 is located on the control panel of the stove, directly below the knob 1. The reflective element 2 can be a ring-shaped sticker, the surface of which is physically divided into a first reflective area and a second reflective area. The first reflective area corresponds to the on state (high reflectivity), and the second reflective area corresponds to the off state (low reflectivity).

[0118] Reference Figure 4 and Figure 7 The sensing unit 11 typically includes a transmitting subunit (such as an infrared emitter) and a receiving subunit (such as an infrared receiver), which are arranged side by side with their working surfaces facing downwards from the knob 1. The sensing unit 11 is mounted on the bottom surface of the circuit board 8, vertically facing the reflector 2. Through holes 12 are provided on the base plate 7 at positions corresponding to the transmitting and receiving subunits. The sensing unit 11 is used to generate a real-time detection signal characterizing the rotational state of the knob 1.

[0119] When knob 1 is pressed and rotated to the working angle, sensing unit 11 detects a high reflection signal. Based on this, the control unit determines that the first logic condition is met, and thus outputs a latching signal to maintain power supply.

[0120] When knob 1 is rotated back to the zero position, sensing unit 11 detects a low-reflection signal. Based on this, the control unit determines that the second logic condition is met, thereby stopping the output of the latch signal and executing a power-off.

[0121] The communication unit 10 is connected to the control unit. During power supply maintenance, the control unit sends the operating status (such as ignition, high fire) determined by the sensing signal to the external device (such as a smoke hood) through the communication unit 10 to trigger the automatic response of the external device.

[0122] In one embodiment, the power supply unit 3 may be a button battery only.

[0123] In another embodiment, the power supply unit 3 may further include a button cell, a flexible photovoltaic module, and a power conversion board; the flexible photovoltaic module is connected to the power conversion board via an output line; and the power conversion board carries a lithium-ion energy storage unit.

[0124] Flexible photovoltaic modules are used to convert received ambient light into electrical energy and charge lithium-ion energy storage units via power conversion panels.

[0125] The flexible photovoltaic module can be installed on the top of the knob housing 6, in which case the top of the knob housing 6 is made of transparent material. Alternatively, it can be installed on the inner side wall of the knob housing 6, in which case the side wall of the knob housing 6 is made of transparent material.

[0126] Based on the above embodiments, this application provides a linkage system, referring to... Figure 8 The linkage system provided in this application includes a knob assembly 13 of any of the foregoing embodiments; and an external device 14, which is configured to receive the operating status sent by the knob assembly 13 and respond accordingly.

[0127] Here, the knob assembly 13 and the external device 14 establish a data transmission link through wireless communication technology to enable collaborative work between the devices.

[0128] The knob assembly 13 is configured to be mounted on a first device. In a preferred application scenario, the first device is a gas stove, integrated stove, or induction cooker. The knob assembly 13 includes a knob body 1 and a reflective element 2. The knob is physically coupled to the valve stem of the first device through a connection interface at its bottom, replacing the original mechanical knob. The reflective element is attached to the operation panel of the first device, located directly below the knob.

[0129] The knob assembly 13 serves as the command initiator and integrates a power supply unit, a control unit, a power latch circuit, an actuation unit, a sensing unit, and a communication unit.

[0130] In standby mode, the knob assembly 13 is completely powered off. When the user applies physical pressure to the knob, the internal actuation unit closes, generating a first trigger signal and connecting the initial power circuit.

[0131] After power-on, the sensing unit detects the reflection signal from the reflective element below. The reflective element is divided into a first reflective area corresponding to the on state and a second reflective area corresponding to the off state. If the knob is detected to be rotated to the on state, the control unit outputs a latching signal to the power latching circuit to lock the power supply circuit, ensuring that the system continues to work even after the user releases the knob.

[0132] During the period when power supply is maintained, the control unit broadcasts or sends control commands to the outside world through the communication unit based on the real-time operating status (such as ignition, high fire setting) detected by the sensing unit.

[0133] External device 14, acting as a response end, is configured to receive signals sent by knob assembly 13 and perform corresponding actions. In a typical range hood and cooktop linkage scenario, external device 14 is the range hood. Of course, external device 14 can also be other devices such as exhaust fans, kitchen air conditioners, smart lighting systems, or gas alarms.

[0134] External device 14 includes the device body and a communication module.

[0135] The communication module is matched with the communication unit in the knob assembly 13, using the same wireless communication protocol (such as Bluetooth Low Energy (BLE), ZigBee, Wi-Fi, or RF). The communication module is responsible for receiving data packets from the knob assembly 13 and demodulating them into digital commands for transmission to the main controller of the external device 14.

[0136] The main controller of external device 14 adjusts its own working status according to the received operating status instructions.

[0137] The workflow of the linkage system is as follows: The user presses and rotates the knob on the stove to ignite it. The pressing action physically triggers the knob assembly 13 to power on.

[0138] When the knob assembly 13 detects that it has entered the opening area during self-testing, it immediately latches the power and sends an opening command via wireless signal.

[0139] Upon receiving the start command, the range hood automatically starts the motor to begin exhausting smoke.

[0140] During cooking, the knob assembly 13 is powered by a latching circuit and continuously monitors the knob position. If the user adjusts the heat, the knob assembly 13 updates its status in real time and sends it to the range hood to ensure that the airflow follows the heat.

[0141] The user turns the knob back to the zero position to turn off the flame. Knob assembly 13 detects that the flame has entered the off zone and first sends a shutdown command to the range hood.

[0142] The range hood receives a command and executes a shutdown or delayed shutdown procedure.

[0143] After the transmission is completed, the control unit of the knob assembly 13 actively stops outputting latching signals, cuts off the power latching circuit, and then enters a completely power-off state with zero power consumption, waiting for the next physical press to wake it up.

[0144] The computer program product provided in this application includes a computer-readable storage medium storing program code. The instructions included in the program code can be used to execute the methods described in the preceding method embodiments. For specific implementation details, please refer to the method embodiments, which will not be repeated here.

[0145] Those skilled in the art will clearly understand that, for the sake of convenience and brevity, the specific working process of the system and apparatus described above can be referred to the corresponding process in the foregoing method embodiments, and will not be repeated here.

[0146] Furthermore, in the description of the embodiments of this application, unless otherwise expressly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0147] If the aforementioned functions are implemented as software functional units and sold or used as independent products, they can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of this application, in essence, or the part that contributes to the prior art, or a portion of the technical solution, can be embodied in the form of a software product. This computer software product is stored in a storage medium and includes several instructions to cause a computer device (which may be a personal computer, server, or network device, etc.) to execute all or part of the steps of the methods described in the various embodiments of this application. The aforementioned storage medium includes various media capable of storing program code, such as USB flash drives, portable hard drives, read-only memory (ROM), random access memory (RAM), magnetic disks, or optical disks.

[0148] In the description of this application, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0149] Finally, it should be noted that the above-described embodiments are merely specific implementations of this application, used to illustrate the technical solutions of this application, and not to limit them. The scope of protection of this application is not limited thereto. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that any person skilled in the art can still modify or easily conceive of changes to the technical solutions described in the foregoing embodiments, or make equivalent substitutions for some of the technical features, within the scope of the technology disclosed in this application. Such modifications, changes, or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this application, and should all be covered within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of protection of the claims.

Claims

1. A power supply control method, characterized in that, The method is applied to a knob assembly, the knob assembly including a knob, the knob including a power supply unit, a control unit, and a power latching circuit, the control unit being used to execute the method, including: In response to a received first trigger signal, the device enters a power-on state; wherein the first trigger signal is used to establish a power supply circuit between the power supply unit and the control unit. In the powered-on state, a real-time detection signal is acquired; the real-time detection signal is used to characterize the rotation state of the knob. If the real-time detection signal meets the preset first logic condition, a latch signal is output to the power latch circuit to maintain the conduction state of the power supply circuit after the first trigger signal ends. During the period when the conduction state is maintained, if the real-time detection signal meets the preset second logic condition, the output of the latch signal to the power latch circuit is stopped, so as to disconnect the power supply circuit and enter the power-off state.

2. The power supply control method according to claim 1, characterized in that, The first trigger signal is generated in response to a physical pressing operation on the knob.

3. The power supply control method according to claim 1, characterized in that, The step of detecting that the knob assembly satisfies a preset first logic condition includes: If the real-time detection signal corresponds to a preset on state region, it is determined that the real-time detection signal satisfies the preset first logic condition.

4. The power supply control method according to claim 3, characterized in that, The step of detecting that the real-time detection signal satisfies a preset second logic condition includes: If the real-time detection signal corresponds to a preset off state region, it is determined that the real-time detection signal satisfies the preset second logic condition.

5. The power supply control method according to claim 4, characterized in that, The knob also includes a sensing unit; the knob assembly also includes a reflective element; the sensing unit works in conjunction with the reflective element; the reflective element is provided with a first reflective area corresponding to the preset open state area and a second reflective area corresponding to the preset closed state area; The steps for acquiring the real-time detection signal include: The real-time detection signal generated by the reflection from the first or second reflective area is obtained from the sensing unit.

6. The power supply control method according to claim 5, characterized in that, The knob further includes a communication unit; the knob establishes a communication connection with an external device through the communication unit; the method further includes: During the conduction state, in response to the reflected signal received by the sensing unit, the operating state determined by the real-time detection signal is sent to the external device through the communication unit, so that the external device can respond to the operating state.

7. A knob assembly, characterized in that, The device includes a knob; the knob includes a power supply unit, a control unit, and a power latching circuit; the control unit is configured to perform the power supply control method according to any one of claims 1-6; the power latching circuit is connected between the power supply unit and the control unit.

8. The knob assembly according to claim 7, characterized in that, The knob has an actuation unit inside; the actuation unit is configured to generate a first trigger signal for closing the power latch circuit in response to a first trigger event; wherein the first trigger event is a physical pressing operation on the knob.

9. The knob assembly according to claim 7, characterized in that, The knob also includes a sensing unit and a communication unit; the knob assembly also includes a reflective element; the sensing unit works in conjunction with the reflective element; the knob establishes a communication connection with an external device through the communication unit; The sensing unit is used to generate a real-time detection signal characterizing the rotation state of the knob, so that the control unit can determine whether the first logic condition and the second logic condition are met. The control unit is used to send the operating status determined by the real-time detection signal to the external device through the communication unit, so that the external device can respond to the operating status.

10. A linkage system, characterized in that, include: The knob assembly according to any one of claims 7-9; And an external device configured to receive and respond to the operating status sent by the knob assembly.

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