Knob assembly, cooktop and method for determining a cooktop position

Abstract

The application discloses a knob assembly, a cooking appliance and a method for judging a gear of the cooking appliance. The knob comprises a structure body, the structure body is used for being connected with a valve body operating rod of the cooking appliance and driving the valve body operating rod to rotate, the knob further comprises an acceleration sensor and a main control module, the acceleration sensor is arranged at a first position on the structure body, the first position is a position other than a rotation center of the structure body driving the valve body operating rod to rotate, the acceleration sensor is used for detecting acceleration information of the structure body, the main control module is electrically connected with the acceleration sensor, and the main control module is used for calculating a rotation angle of the structure body according to the acceleration information. The acceleration sensor can react to movement and rotation of the structure body, the acceleration sensor and the main control module are arranged on the structure body, and the influence of temperature rise of the acceleration sensor and the main control module caused by the burner during combustion is reduced, and the production and manufacturing of the knob assembly and the cooking appliance are facilitated.

Description

Technical Field

[0001] This invention provides a knob assembly, a stove, and a method for determining the stove's gear position. Background Technology

[0002] Currently, most cooktops on the market use knobs that serve only as auxiliary valve operation, adjusting the flame level through rotation. The actual detection devices or other sensors that monitor the cooktop's on / off switch and flame level, the main control module used to calculate the flame level and control the cooktop, and the circuitry or wireless devices that connect the detection devices and the main control module are all located inside the cooktop. Because cooktops generate high temperatures during use, the operating environment for these electronic components is harsh, requiring high reliability and increasing manufacturing costs. Furthermore, the limited space inside the cooktop further complicates manufacturing by housing the detection devices, main control module, and circuitry. Summary of the Invention

[0003] The technical problem to be solved by the present invention is to overcome the shortcomings of the prior art in which electronic components are all located inside the stove, which requires high reliability of electronic components and is difficult to manufacture. The invention provides a knob assembly, a stove and a method for determining the stove gear position.

[0004] The present invention solves the above-mentioned technical problems through the following technical solution:

[0005] A knob assembly includes a structure for connecting to and rotating a valve body operating lever of a cooktop.

[0006] The knob assembly also includes an accelerometer and a main control module. The accelerometer is located at a first position on the structure, which is a position other than the rotation center from which the structure drives the valve body operating lever to rotate.

[0007] The accelerometer is used to detect the acceleration information of the structure. The main control module is electrically connected to the accelerometer and is used to calculate the rotation angle of the structure based on the acceleration information.

[0008] In this design, an accelerometer can respond to the movement and rotation of the structure. By placing the accelerometer in a first position, the main control module calculates the angle the structure has rotated and the corresponding stove setting. By mounting the accelerometer and main control module on the structure, which is relatively far from the burner, the impact of the burner's combustion on the temperature rise of the accelerometer and main control module is reduced. This lowers the requirements for the accelerometer and main control module's resistance to high temperatures and humidity, thus reducing the stove's manufacturing cost. Sufficient space within the structure is available for mounting the accelerometer and main control module, facilitating the production of the knob assembly and the stove itself.

[0009] Preferably, the knob assembly further includes a switching circuit and a power module, the power module being electrically connected to the accelerometer, and the switching circuit being connected to the accelerometer, the main control module, and the power module respectively;

[0010] When the accelerometer detects acceleration in the structure, the switching circuit connects the power module and the main control module, and the main control module starts.

[0011] In this solution, the power module continuously supplies power to the accelerometer. When the accelerometer detects acceleration in the structure, the active module is activated via a switching circuit. The accelerometer sends acceleration information to the main control module, which calculates the angle the structure has rotated and the corresponding stove setting. When the accelerometer does not detect acceleration, the main control module is shut down via a switching circuit, thereby reducing the energy consumption of the main control module and improving the user experience of the knob assembly.

[0012] Preferably, the switching circuit includes a first diode and a second diode, the first diode and the second diode sharing a common cathode, the anode of the first diode being connected to the interrupt pin of the accelerometer, and the anode of the second diode being connected to the I / O port of the main control module.

[0013] The common cathode of the first diode and the second diode is connected to the output interface through a first resistor, and the output interface is grounded through a first capacitor. The common cathode of the first diode and the second diode is also grounded through a second resistor.

[0014] Preferably, the switching circuit includes an NPN transistor and a P-channel MOSFET, wherein the NPN transistor has a base, a collector, and an emitter, and the P-channel MOSFET has a gate, a source, and a drain.

[0015] The output interface is connected to the base via a third resistor, the emitter is grounded, the base is connected to the emitter via a fourth resistor, the collector is connected to the gate, the source is connected to the power supply module, the drain is connected to the main control module, the source and the drain are connected via a diode, the source is connected to the collector via a fifth resistor, and the power supply is connected to the main control module via a sixth resistor.

[0016] In this solution, with the above configuration, the first and second diodes are common-cathode diodes. The anode of the first diode is connected to the interrupt pin of the accelerometer, and the anode of the second diode is connected to the I / O port of the main control module. When either the interrupt pin of the accelerometer or the I / O port of the main control module outputs a high level, a high level is output through the first and second diodes. When the accelerometer detects acceleration in the structure, it outputs a high level through its interrupt pin, powering on the main control module via a switching circuit. After the main control module starts, its I / O port outputs a high level. At this time, the main control module calculates the angle through which the structure has rotated and the corresponding stove setting based on that angle. After the main control module completes the calculation, both its I / O port and the interrupt pin of the accelerometer output a low level, disconnecting the power supply to the main control module via the switching circuit. This reduces the energy consumption of the main control module and improves the user experience of the knob assembly.

[0017] Preferably, the knob assembly further includes a micro switch, which is located at the connection position between the structure and the valve body operating rod.

[0018] In this solution, a microswitch helps determine whether the structure is properly assembled relative to the valve body operating lever. When the microswitch is closed, the structure is assembled relative to the main control module. The angle of rotation of the structure and the corresponding stove setting are calculated based on the acceleration information measured by the accelerometer. When the microswitch is open, the structure is not properly assembled relative to the valve body operating lever. In this case, the structure cannot drive the valve body operating lever to rotate and adjust the stove's heat. The main control module is then powered down, thus reducing the energy consumption of the main control module. This mechanical design reduces the possibility of misjudgment by the main control module, improving the user experience of the knob assembly.

[0019] A cooker stove includes a burner, a valve body operating lever, and the aforementioned knob assembly. The valve body operating lever is used to adjust the flame intensity of the burner, and the structure is connected to the valve body operating lever.

[0020] In this design, an accelerometer can respond to the movement and rotation of the structure. By placing the accelerometer in a first position, the main control module calculates the angle the structure has rotated and the corresponding stove setting. By mounting the accelerometer and main control module on the structure, which is relatively far from the burner, the impact of the burner's combustion on the temperature rise of the accelerometer and main control module is reduced. This lowers the requirements for the accelerometer and main control module's resistance to high temperatures and humidity, thus reducing the stove's manufacturing cost. Sufficient space within the structure is available for mounting the accelerometer and main control module, facilitating the production of the knob assembly and the stove itself.

[0021] A method for determining the setting of a stove, the method being applied to the aforementioned stove, the method comprising:

[0022] The acceleration information of the structure is detected by the accelerometer and transmitted to the main control module;

[0023] The main control module calculates the rotation angle of the structure based on the acceleration information, and determines the speed setting of the stove based on the rotation angle.

[0024] In this design, an accelerometer can respond to the movement and rotation of the structure. By placing the accelerometer in a first position, the main control module calculates the angle the structure has rotated and the corresponding stove setting. By mounting the accelerometer and main control module on the structure, which is relatively far from the burner, the impact of the burner's combustion on the temperature rise of the accelerometer and main control module is reduced. This lowers the requirements for the accelerometer and main control module's resistance to high temperatures and humidity, thus reducing the stove's manufacturing cost. Sufficient space within the structure is available for mounting the accelerometer and main control module, facilitating the production of the knob assembly and the stove itself.

[0025] Preferably, the knob assembly further includes a switching circuit and a power supply module, and the determination method further includes:

[0026] The accelerometer sensor detects acceleration at the knob.

[0027] The switching circuit connects the power supply module and the main control module, and the main control module is started.

[0028] In this solution, the power module continuously supplies power to the accelerometer. When the accelerometer detects acceleration in the structure, the active module is activated via a switching circuit. The accelerometer sends acceleration information to the main control module, which calculates the angle the structure has rotated and the corresponding stove setting. When the accelerometer does not detect acceleration, the main control module is shut down via a switching circuit, thereby reducing the energy consumption of the main control module and improving the user experience of the knob assembly.

[0029] Preferably, the switching circuit includes a first diode, a second diode, an NPN transistor, and a P-channel MOSFET.

[0030] The determination method includes:

[0031] After the accelerometer detects acceleration in the structure, the accelerometer outputs a high level through the interrupt pin, and the output interface outputs a high level.

[0032] After the accelerometer is maintained for a first preset time, it outputs a low level through the interrupt pin.

[0033] Before the first preset time is reached, the NPN transistor and the P-channel MOSFET are turned on, the main control module is started, and the I / O port of the main control module outputs a high level;

[0034] When the accelerometer does not operate for a second preset time, both the I / O port of the main control module and the interrupt pin of the accelerometer output a low level, and the NPN transistor and the P-channel MOSFET are disconnected.

[0035] In this design, the first and second diodes are common-cathode diodes. The anode of the first diode is connected to the interrupt pin of the accelerometer, and the anode of the second diode is connected to the I / O port of the main control module. When either the interrupt pin of the accelerometer or the I / O port of the main control module outputs a high level, a high level is output through the first and second diodes. When the accelerometer detects acceleration in the structure, it outputs a high level through its interrupt pin, powering on the main control module via a switching circuit and maintaining this power for a first preset time. After the main control module starts, its I / O port outputs a high level. At this time, the main control module calculates the angle through which the structure has rotated and the corresponding stove setting based on that angle. After a second preset time, once the main control module has completed its calculation, both its I / O port and the interrupt pin of the accelerometer output a low level, disconnecting the power supply to the main control module via the switching circuit. This reduces the energy consumption of the main control module and improves the user experience of the knob assembly.

[0036] Preferably, the acceleration information includes the acceleration of the structure in the X-axis, Y-axis, and Z-axis directions.

[0037] The main control module calculates the rotation angle of the structure based on the acceleration information, including:

[0038] The main control module obtains the displacement value S of the structure in the X-axis direction based on the acceleration information. X The displacement value S in the Y-axis direction Y and the displacement value S in the Z-axis direction Z .

[0039] The main control module is based on the displacement value S X and the displacement value S Y The arc length Y traversed by the accelerometer is obtained. S And according to the arc length Y S The angle through which the accelerometer sensor rotates is obtained.

[0040] In this scheme, the main control module combines the acceleration information measured by the accelerometer in the X, Y, and Z axes with two integration operations to obtain the displacement of the accelerometer in the X and Y axes (i.e., on the horizontal plane) and the displacement in the Z axis relative to the initial state. Then, based on the displacement of the accelerometer in the horizontal plane, the arc length Y traversed by the accelerometer on the structure is calculated. S According to the arc length Y S The angle through which the acceleration sensor rotates is obtained, thereby determining the current setting of the stove.

[0041] Preferably, the knob assembly further includes a micro switch, which is disposed at the connection position between the structure and the valve body operating rod. The structure and the valve body operating rod have a connection length L1 in the Z-axis direction. The determination method includes:

[0042] When the micro switch switches from the open state to the closed state, the displacement value S Z The absolute value of the displacement value S is not less than the connection length L1. X When the absolute value is greater than 0, the main control module determines that the structure is assembled in place relative to the valve body operating rod. The main control module calculates the rotation angle of the structure based on the acceleration information and determines the gear of the stove based on the rotation angle.

[0043] When the micro switch switches from the closed state to the open state, the displacement value S Z The absolute value of the displacement value S is not less than the connection length L1. XWhen the absolute value is greater than 0, the structure is removed from the valve body operating rod, the switching circuit is disconnected, and the main control module is powered down;

[0044] When the micro switch is in the off state, the main control module determines that the structure is not assembled to the valve body operating rod.

[0045] In this solution, the main control module can calculate the displacement of the structure in the X, Y, and Z axes based on the acceleration information emitted by the accelerometer. By calculating and comparing the displacement of the structure in the Z axis with the connection length of the structure relative to the valve body operating rod, and using a microswitch, it helps determine whether the structure is properly assembled relative to the valve body operating rod. When the microswitch is in the closed state, the structure is in the assembled state relative to the main control module; when the microswitch switches from the open state to the closed state, the displacement value S... Z The absolute value is not less than the connection length L1, and the displacement value S X When the absolute value of the displacement S is greater than 0, the structure is assembled and in place relative to the valve body operating rod. After the main control module determines that the structure and valve body operating rod are assembled, it calculates the angle through which the structure has rotated and the corresponding stove setting based on the acceleration information measured by the acceleration sensor. When the microswitch is in the open state, the structure is not assembled and in place relative to the valve body operating rod; when the microswitch switches from the closed state to the open state, the displacement value S of the structure... Z The absolute value is not less than the connection length L1, and the displacement value S X When the absolute value is greater than 0, the main control module determines that the structure is detached from the valve body operating rod. When the structure is not assembled with respect to the valve body operating rod, the structure cannot drive the valve body operating rod to rotate and adjust the stove's heat. In this case, the main control module shuts down, thereby reducing the energy consumption generated by the main control module's operation. This mechanical setting reduces the possibility of misjudgment by the main control module, improving the user experience of the knob assembly.

[0046] Preferably, the valve body operating rod has a downward pressing length L2 in the Z-axis direction, and the determination method includes:

[0047] When the displacement value S Z When the displacement value is greater than the downward pressure length, the main control module determines that an electrical spark has been generated.

[0048] When the displacement value S Y When the absolute value of is greater than 0, the main control module determines that ignition has occurred.

[0049] In this solution, when ignition is required, the structure drives the valve body operating rod to press down, with the downward stroke needing to be greater than the downward length L2. Once the structure is properly assembled with the valve body operating rod, it can rotate the rod to adjust the stove's heat output. The main control module powers on and calculates the angle the structure has rotated and the corresponding stove setting based on the acceleration stroke i. When the displacement value S... Z When the displacement value is less than -L2, the main control module determines that an electric spark has been generated, meaning the stove is ready to ignite; when the displacement value S Y When the absolute value is greater than 0, the main control module determines that ignition has occurred and performs calculations based on the acceleration information.

[0050] The positive and progressive effects of this invention are as follows: the accelerometer can respond to the movement and rotation of the structure. By placing the accelerometer in a first position, the main control module calculates the angle through which the structure rotates and the corresponding stove setting. By placing the accelerometer and main control module on the structure, which is further away from the burner, the impact of the burner's combustion on the temperature rise of the accelerometer and main control module is reduced, lowering the requirements for the accelerometer and main control module's resistance to high temperatures and humidity, thereby reducing the manufacturing cost of the stove. Sufficient space on the structure is available for installing the accelerometer and main control module, facilitating the production of the knob assembly and the stove itself. Attached Figure Description

[0051] Figure 1 This is a bottom view of a knob assembly according to an embodiment of the present invention.

[0052] Figure 2 This is a schematic diagram of a knob assembly installed on a valve body operating lever according to an embodiment of the present invention.

[0053] Figure 3 This is a schematic diagram showing the arrangement of the acceleration sensor in a knob assembly according to an embodiment of the present invention.

[0054] Figure 4 This is a partial schematic diagram of a switching circuit according to an embodiment of the present invention.

[0055] Figure 5 This is a partial schematic diagram of a switching circuit according to an embodiment of the present invention.

[0056] Figure 6 This is a flowchart of the operation of the switching circuit in a stove gear setting determination method according to an embodiment of the present invention.

[0057] Figure 7 This is a flowchart of a method for determining the stove setting according to an embodiment of the present invention.

[0058] Knob assembly 100

[0059] Structure 1

[0060] Connecting part 11

[0061] Power Module 2

[0062] Accelerometer 3

[0063] micro switch 4

[0064] Valve body operating lever 200

[0065] Interrupt pin INT1

[0066] IO port P08

[0067] First diode D1

[0068] Second diode D2

[0069] Output interface EN

[0070] P-channel MOSFET Q1

[0071] NPN transistor Q2

[0072] First resistor R1

[0073] Second resistor R2

[0074] Third resistor R3

[0075] Fourth resistor R4

[0076] Fifth resistor R5

[0077] Sixth resistor R6 Detailed Implementation

[0078] The present invention will be further illustrated by way of embodiments below, but the present invention is not limited to the scope of the embodiments described herein.

[0079] This invention provides a knob assembly 100, such as Figures 1-3 As shown, the knob assembly 100 includes a structure 1, which is used to connect with the valve body operating lever 200 of the stove and drive the valve body operating lever 200 to rotate. The knob assembly 100 also includes an acceleration sensor 3 and a main control module. The acceleration sensor 3 is located at a first position on the structure 1, such as... Figure 3As shown, the first position is a position other than the rotation center where the structure 1 drives the valve body operating rod 200 to rotate. The acceleration sensor 3 is used to detect the acceleration information of the structure 1. The main control module is electrically connected to the acceleration sensor 3 and is used to calculate the rotation angle of the structure 1 based on the acceleration information. In this embodiment, the structure 1 is provided with a connecting part 11 that connects to the valve body operating rod 200. The connecting part 11 is a hole with a "D" shaped cross-section.

[0080] Accelerometer 3 can respond to the movement and rotation of structure 1. By placing accelerometer 3 in the first position, the main control module calculates the angle through which structure 1 has rotated and the corresponding stove setting. By placing accelerometer 3 and the main control module on structure 1, which is far from the burner, the impact of the burner's combustion on the temperature rise of accelerometer 3 and the main control module is reduced. This lowers the requirements for high temperature and humidity resistance of accelerometer 3 and the main control module, thereby reducing the manufacturing cost of the stove. Structure 1 has sufficient space for accelerometer 3 and the main control module, facilitating the production of the knob assembly 100 and the stove.

[0081] As a preferred implementation method, such as Figure 2 As shown, the knob assembly 100 also includes a switching circuit and a power module 2. The power module 2 is electrically connected to the accelerometer 3, and the switching circuit is connected to the accelerometer 3, the main control module, and the power module 2. When the accelerometer 3 detects acceleration in the structure 1, the switching circuit connects the power module 2 and the main control module, and the main control module is activated. In this embodiment, the power module 2 is located on the side of the structure 1 near the valve body operating lever 200, which helps to reduce the space occupied in the height direction after the knob assembly 100 is connected to the valve body operating lever 200, and facilitates the setting of the power module 2 and the use of the knob assembly 100.

[0082] The power module 2 provides continuous power to the accelerometer 3. When the accelerometer 3 detects acceleration in the structure 1, the active module is activated via a switching circuit. The accelerometer 3 sends acceleration information to the main control module, which calculates the angle rotated by the structure 1 and the corresponding stove setting. When the accelerometer 3 does not detect acceleration in the structure 1, the main control module is shut down via a switching circuit, thereby reducing the energy consumption of the main control module and improving the user experience of the knob assembly 100.

[0083] In specific implementation, such as Figure 4As shown, the switching circuit includes a first diode D1 and a second diode D2. The first diode D1 and the second diode D2 share a common cathode. The anode of the first diode D1 is connected to the interrupt pin INT1 of the accelerometer 3. The anode of the second diode D2 is connected to the IO port P08 of the main control module. The common cathode of the first diode D1 and the second diode D2 is connected to the output interface EN through the first resistor R1. The output interface EN is grounded through the first capacitor. The common cathode of the first diode D1 and the second diode D2 is also grounded through the second resistor R2.

[0084] In specific implementation, such as Figure 5 As shown, the switching circuit includes an NPN transistor Q2 and a P-channel MOSFET Q1. The NPN transistor Q2 has a base, collector, and emitter, while the P-channel MOSFET Q1 has a gate, source, and drain. The output interface EN is connected to the base via a third resistor R3, the emitter is grounded, the base is connected to the emitter via a fourth resistor R4, the collector is connected to the gate, the source is connected to the power supply module 2, and the drain is connected to the main control module. The source and drain are connected via a diode, and the source is connected to the collector via a fifth resistor R5. The power supply is connected to the main control module via a sixth resistor R6. In this scheme, with the above configuration, the first diode D1 and the second diode D2 are common cathode diodes. The anode of the first diode D1 is connected to the interrupt pin INT1 of the accelerometer 3, and the anode of the second diode D2 is connected to the I / O port P08 of the main control module. When either the interrupt pin INT1 of the accelerometer 3 or the I / O port P08 of the main control module outputs a high level, a high level is output through the first diode D1 and the second diode D2. When the accelerometer 3 detects acceleration in the structure 1, it outputs a high level through the interrupt pin INT1, powering on the main control module via the switching circuit. After the main control module starts up, its I / O port P08 outputs a high level. At this time, the main control module calculates the acceleration information to obtain the angle through which the structure 1 has rotated and the corresponding stove setting. After the main control module completes the calculation, both its I / O port P08 and the interrupt pin INT1 of the accelerometer 3 output a low level, disconnecting the power supply to the main control module via the switching circuit. This reduces the energy consumption generated by the main control module and improves the user experience of the knob assembly 100.

[0085] As a preferred implementation method, such as Figure 2 As shown, the knob assembly 100 also includes a micro switch 4, which is located at the connection point between the structure 1 and the valve body operating rod 200. In this embodiment, the micro switch 4 is located on the valve body operating rod 200.

[0086] Microswitch 4 helps determine whether structure 1 is properly assembled relative to valve body operating lever 200. When microswitch 4 is closed, structure 1 is assembled relative to the main control module. The angle rotated by structure 1 and the corresponding stove setting are calculated based on the acceleration information measured by acceleration sensor 3. When microswitch 4 is open, structure 1 is not properly assembled relative to valve body operating lever 200. In this case, structure 1 cannot drive valve body operating lever 200 to rotate and adjust the stove's heat. The main control module is powered down, thus reducing energy consumption. This mechanical setting reduces the possibility of misjudgment by the main control module, improving the user experience of the knob assembly 100.

[0087] The present invention also provides a stove, which includes a burner, a valve body operating lever 200 and the aforementioned knob assembly 100. The valve body operating lever 200 is used to adjust the firepower of the burner, and the structure 1 is connected to the valve body operating lever 200.

[0088] Accelerometer 3 can respond to the movement and rotation of structure 1. By placing accelerometer 3 in the first position, the main control module calculates the angle through which structure 1 has rotated and the corresponding stove setting. By placing accelerometer 3 and the main control module on structure 1, which is far from the burner, the impact of the burner's combustion on the temperature rise of accelerometer 3 and the main control module is reduced. This lowers the requirements for high temperature and humidity resistance of accelerometer 3 and the main control module, thereby reducing the manufacturing cost of the stove. Structure 1 has sufficient space for accelerometer 3 and the main control module, facilitating the production of the knob assembly 100 and the stove.

[0089] This invention also provides a method for determining the stove's power setting, such as... Figure 7 As shown, the judgment method is applied to the above-mentioned stove, and the judgment method includes:

[0090] S310: Detects the acceleration information of structure 1 through acceleration sensor 3 and transmits it to the main control module;

[0091] S320: The main control module calculates the rotation angle of structure 1 based on the acceleration information, and determines the stove's gear position based on the rotation angle.

[0092] Accelerometer 3 can respond to the movement and rotation of structure 1. By placing accelerometer 3 in the first position, the main control module calculates the angle through which structure 1 has rotated and the corresponding stove setting. By placing accelerometer 3 and the main control module on structure 1, which is far from the burner, the impact of the burner's combustion on the temperature rise of accelerometer 3 and the main control module is reduced. This lowers the requirements for high temperature and humidity resistance of accelerometer 3 and the main control module, thereby reducing the manufacturing cost of the stove. Structure 1 has sufficient space for accelerometer 3 and the main control module, facilitating the production of the knob assembly 100 and the stove.

[0093] In a preferred embodiment, the knob assembly 100 further includes a switching circuit and a power supply module 2, and the determination method further includes:

[0094] S110: Accelerometer 3 detects acceleration at the knob;

[0095] S120: The switching circuit connects the power supply module 2 and the main control module, and the main control module starts.

[0096] The power module 2 provides continuous power to the accelerometer 3. When the accelerometer 3 detects acceleration in the structure 1, the active module is activated via a switching circuit. The accelerometer 3 sends acceleration information to the main control module, which calculates the angle rotated by the structure 1 and the corresponding stove setting. When the accelerometer 3 does not detect acceleration in the structure 1, the main control module is shut down via a switching circuit, thereby reducing the energy consumption of the main control module and improving the user experience of the knob assembly 100.

[0097] As a preferred implementation method, such as Figure 6 As shown, the switching circuit includes a first diode D1, a second diode D2, an NPN transistor Q2, and a P-channel MOSFET Q1. Before steps S310 and S320 above, the determination method also includes:

[0098] S210: After the accelerometer 3 detects that there is acceleration in the structure 1, the accelerometer 3 outputs a high level through the interrupt pin INT1 and the output interface EN outputs a high level.

[0099] S220: After the accelerometer 3 maintains the first preset time, it outputs a low level through the interrupt pin INT1;

[0100] S230: Before the first preset time is reached, NPN transistor Q2 and P-channel MOSFET Q1 are turned on, the main control module starts, and the main control module's IO port P08 outputs a high level;

[0101] S240: When the accelerometer 3 does not operate for the second preset time, both the main control module's IO port P08 and the accelerometer 3's interrupt pin INT1 output a low level.

[0102] S250: NPN transistor Q2 and P-channel MOSFET Q1 are disconnected, and the main control module and wireless module are powered off.

[0103] The first diode D1 and the second diode D2 are common cathode diodes. The anode of the first diode D1 is connected to the interrupt pin INT1 of the accelerometer 3, and the anode of the second diode D2 is connected to the IO port P08 of the main control module. When either the interrupt pin INT1 of the accelerometer 3 or the IO port P08 of the main control module outputs a high level, a high level can be output through the first diode D1 and the second diode D2. When the accelerometer 3 detects acceleration in the structure 1, it outputs a high level through the interrupt pin INT1, powers on the main control module via the switching circuit, and maintains this power for a first preset time. After the main control module starts, its I / O port P08 outputs a high level. At this time, the main control module calculates the acceleration information to obtain the angle through which the structure 1 has rotated and the corresponding stove setting. After a second preset time has elapsed, the main control module completes the calculation, and both its I / O port P08 and the interrupt pin INT1 of the accelerometer 3 output a low level. The power supply to the main control module is then disconnected via the switching circuit, thereby reducing the energy consumption generated by the main control module and improving the user experience of the knob assembly 100.

[0104] In this embodiment, the cooktop also includes a wireless module for communicating with other devices. The wireless module can be a 2.4G module, a WiFi module, or a Bluetooth module. The power module 2 can supply power to the wireless module through a switching circuit.

[0105] In the specific implementation process, the acceleration information includes the acceleration of structure 1 in the X-axis direction, Y-axis direction, and Z-axis direction.

[0106] In step S320 above, the main control module calculates the rotation angle of structure 1 based on the acceleration information, including:

[0107] S321: The main control module obtains the displacement value S of structure 1 in the X-axis direction based on the acceleration information. X The displacement value S in the Y-axis direction Y and the displacement value S in the Z-axis direction Z ,

[0108] S322: The main control module determines the displacement value S X and displacement value S Y The arc length Y of the accelerometer sensor 3 is obtained. SAnd according to the arc length Y S The angle through which the accelerometer 3 rotates is obtained.

[0109] In this scheme, the main control module combines the acceleration information measured by the accelerometer 3 in the X-axis, Y-axis and Z-axis directions with two integration operations to obtain the displacement of the accelerometer 3 in the X-axis and Y-axis directions (i.e., on the horizontal plane) and the displacement in the Z-axis direction relative to the initial state. Based on the displacement of the accelerometer 3 in the horizontal plane, the arc length Y traversed by the accelerometer 3 on the structure 1 is calculated. S According to the arc length Y S The angle through which the accelerometer 3 rotates is obtained, thereby determining the current setting of the stove.

[0110] In this embodiment, the main control module acquires data from the accelerometer 3 in real time: X-axis acceleration Xa. i Y-axis acceleration Ya i Z-axis acceleration Za i At this time, the sampling frequency is f, that is... Δt is the time difference between two samplings. Based on the formulas for acceleration, velocity, and displacement (assuming uniform acceleration during the two sampling intervals Δt): Integrating the acceleration yields the velocity:

[0111]

[0112] The displacement can be obtained by integrating the velocity signal once:

[0113]

[0114] Where a i Let v be the acceleration sample value at time i. i Let be the velocity value at time i, a0 = 0, v0 = 0. Also, the main control module requires a certain time T to power on and start up.

[0115]

[0116] Therefore, the formula is revised as follows:

[0117]

[0118]

[0119] Therefore, the main control module calculates the displacement value S in the X-axis direction in real time. X The displacement value S in the Y-axis direction Y and the displacement value S in the Z-axis direction Z .

[0120] The initial position of the accelerometer 3 relative to the central origin is (X0, Y0), that is, Y0 = 0, X0 = r > 0, where r is the distance from the accelerometer 3 to the central origin.

[0121] Rotate the knob by a certain angle θ i After (angle system), the coordinates of accelerometer 3 are (X... i ,Y i ).

[0122] If accelerometer 3 moves in a circular motion around the center, then the angle θ i The corresponding arc length is Ys i .

[0123] According to the arc length formula, Ys i =(θ i *π*r) / 180

[0124] Therefore θ i =(180*Ys) i ) / (π*r)

[0125] The fire intensity is adjusted by rotating the knob at an angle θ. i With firepower (or its variation) F i There is a certain relationship, namely F i =f(θ) i ).

[0126] In specific implementation, the knob assembly 100 also includes a micro switch 4, which is located at the connection position between the structure 1 and the valve body operating rod 200. The structure 1 and the valve body operating rod 200 have a connection length L1 in the Z-axis direction. The judgment method includes:

[0127] S410: When the microswitch 4 switches from the open state to the closed state, the displacement value S Z The absolute value is not less than the connection length L1, and the displacement value S X When the absolute value is greater than 0, the main control module determines that the structure 1 is assembled in place relative to the valve body operating rod 200. The main control module calculates the rotation angle of the structure 1 based on the acceleration information and determines the stove's gear position based on the rotation angle.

[0128] S420: When the microswitch 4 switches from the closed state to the open state, the displacement value S Z The absolute value is not less than the connection length L1, and the displacement value S X When the absolute value is greater than 0, structure 1 is removed from valve body operating rod 200, the switching circuit is disconnected, and the main control module is powered down;

[0129] S430: When the micro switch 4 is in the open state, the main control module determines that the structure 1 is not assembled to the valve body operating rod 200.

[0130] The main control module can calculate the displacement of structure 1 in the X, Y, and Z axes based on the acceleration information emitted by the accelerometer 3. By calculating and comparing the displacement of structure 1 in the Z axis with the connection length of structure 1 relative to the valve body operating rod 200, and in conjunction with the micro switch 4, it helps determine whether structure 1 is properly assembled relative to the valve body operating rod 200. When the micro switch 4 is in the closed state, structure 1 is in the assembled state relative to the main control module; when the micro switch 4 switches from the open state to the closed state, the displacement value S... Z The absolute value is not less than the connection length L1, and the displacement value S X When the absolute value of the displacement S is greater than 0, the structure 1 is assembled and in place relative to the valve body operating lever 200. After the main control module determines that the structure 1 and the valve body operating lever 200 are assembled in place, the main control module calculates the angle rotated by the structure 1 and the corresponding stove gear based on the acceleration information measured by the acceleration sensor 3. When the micro switch 4 is in the open state, the structure 1 is not assembled in place relative to the valve body operating lever 200; when the micro switch 4 switches from the closed state to the open state, the displacement value S of the structure 1 is... Z The absolute value is not less than the connection length L1, and the displacement value S X When the absolute value is greater than 0, the main control module determines that structure 1 is detached from the valve body operating lever 200. When structure 1 is not assembled with respect to the valve body operating lever 200, structure 1 cannot drive the valve body operating lever 200 to rotate and adjust the firepower of the stove. At this time, the main control module shuts down, thereby reducing the energy consumption generated by the main control module. Through mechanical design, the possibility of misjudgment by the main control module is reduced, which is beneficial to the user experience of the knob assembly 100.

[0131] In specific implementation, the valve body operating rod 200 has a downward pressing length L2 in the Z-axis direction, and the determination method includes:

[0132] When the displacement value S Z When the value is less than -L2 (negative for downward movement, positive for upward movement), the main control module determines that an electrical spark has been generated.

[0133] When the displacement value S Y When the absolute value is greater than 0, the main control module determines that ignition has occurred.

[0134] In this solution, when ignition is required, the valve body operating rod 200 is pressed down by structure 1, and the downward stroke must be greater than the downward length L2. After structure 1 is assembled with the valve body operating rod 200, structure 1 can rotate the valve body operating rod 200 to adjust the stove's heat output. The main control module is powered on and can calculate the angle rotated by structure 1 based on the acceleration stroke i, and the corresponding stove setting. When the displacement value S... Z When the displacement value is less than -L2, the main control module determines that an electric spark has been generated, meaning the stove is ready to ignite; when the displacement value S Y When the absolute value is greater than 0, the main control module determines that ignition has occurred and performs calculations based on the acceleration information.

[0135] While specific embodiments of the present invention have been described above, those skilled in the art should understand that these are merely illustrative examples, and the scope of protection of the present invention is defined by the appended claims. Those skilled in the art can make various changes or modifications to these embodiments without departing from the principles and essence of the present invention, but all such changes and modifications fall within the scope of protection of the present invention.

Claims

1. A knob assembly, the knob assembly comprising a structure for connecting to a valve body operating lever of a stove and driving the valve body operating lever to rotate, characterized in that, The knob assembly also includes an accelerometer and a main control module. The accelerometer is located at a first position on the structure, which is a position other than the rotation center from which the structure drives the valve body operating lever to rotate. The accelerometer is used to detect the acceleration information of the structure. The main control module is electrically connected to the accelerometer and is used to calculate the rotation angle of the structure based on the acceleration information. The knob assembly also includes a micro switch, which is located at the connection point between the structure and the valve body operating rod. The structure and the valve body operating rod have a connection length in the Z-axis direction. When the micro switch switches from the open state to the closed state, the displacement value S of the structure in the Z-axis direction... Z The absolute value is not less than the connection length, and the displacement value S of the structure in the X-axis direction is... X When the absolute value is greater than 0, the main control module determines that the structure is assembled in place relative to the valve body operating rod. The main control module calculates the rotation angle of the structure based on the acceleration information and determines the gear of the stove based on the rotation angle. When the micro switch switches from the closed state to the open state, the displacement value S Z The absolute value of the displacement value S is not less than the connection length. X When the absolute value is greater than 0, the structure is removed from the valve body operating rod, the switching circuit is disconnected, and the main control module is powered down; When the micro switch is in the off state, the main control module determines that the structure is not assembled to the valve body operating rod.

2. The knob assembly as claimed in claim 1, characterized in that, The knob assembly also includes a switching circuit and a power module. The power module is electrically connected to the accelerometer, and the switching circuit is connected to the accelerometer, the main control module, and the power module respectively. When the accelerometer detects acceleration in the structure, the switching circuit connects the power module and the main control module, and the main control module starts.

3. The knob assembly as described in claim 2, characterized in that, The switching circuit includes a first diode and a second diode, which share a common cathode. The anode of the first diode is connected to the interrupt pin of the accelerometer, and the anode of the second diode is connected to the I / O port of the main control module. The common cathode of the first diode and the second diode is connected to the output interface through a first resistor, and the output interface is grounded through a first capacitor. The common cathode of the first diode and the second diode is also grounded through a second resistor.

4. The knob assembly as claimed in claim 3, characterized in that, The switching circuit includes an NPN transistor and a P-channel MOSFET. The NPN transistor has a base, a collector, and an emitter, while the P-channel MOSFET has a gate, a source, and a drain. The output interface is connected to the base via a third resistor, the emitter is grounded, the base is connected to the emitter via a fourth resistor, the collector is connected to the gate, the source is connected to the power supply module, the drain is connected to the main control module, the source and the drain are connected via a diode, the source is connected to the collector via a fifth resistor, and the power supply is connected to the main control module via a sixth resistor.

5. The knob assembly as claimed in claim 4, characterized in that, The knob assembly also includes a micro switch, which is located at the connection position between the structure and the valve body operating rod.

6. A stove, characterized in that, The stove includes a burner, a valve body operating lever, and a knob assembly as described in any one of claims 1-5, wherein the valve body operating lever is used to adjust the firepower of the burner, and the structure is connected to the valve body operating lever.

7. A method for determining the setting of a stove, characterized in that, The determination method is applied to the stove as described in claim 6, and the determination method includes: The acceleration information of the structure is detected by the accelerometer and transmitted to the main control module; The main control module calculates the rotation angle of the structure based on the acceleration information, and determines the speed setting of the stove based on the rotation angle.

8. The method for determining the stove's gear position as described in claim 7, characterized in that, The knob assembly further includes a switch circuit and a power supply module, and the determination method further includes: The accelerometer sensor detects acceleration at the knob. The switching circuit connects the power supply module and the main control module, and the main control module is started.

9. The method for determining the stove's gear position as described in claim 8, characterized in that, The switching circuit includes a first diode, a second diode, an NPN transistor, and a P-channel MOSFET. The determination method includes: After the accelerometer detects that there is acceleration in the structure, the accelerometer outputs a high level through the interrupt pin and the output interface. After the accelerometer is maintained for a first preset time, it outputs a low level through the interrupt pin. Before the first preset time is reached, the NPN transistor and the P-channel MOSFET are turned on, the main control module is started, and the I / O port of the main control module outputs a high level; When the accelerometer does not operate for a second preset time, both the I / O port of the main control module and the interrupt pin of the accelerometer output a low level, and the NPN transistor and the P-channel MOSFET are disconnected.

10. The method for determining the stove's gear position as described in claim 7, characterized in that, The acceleration information includes the acceleration of the structure in the X-axis, Y-axis, and Z-axis directions. The main control module calculates the rotation angle of the structure based on the acceleration information, including: The main control module obtains the displacement value S of the structure in the X-axis direction based on the acceleration information. X The displacement value S in the Y-axis direction Y and the displacement value S in the Z-axis direction Z ; The main control module is based on the displacement value S X and the displacement value S Y The arc length through which the accelerometer has rotated is obtained, and the angle through which the accelerometer has rotated is obtained based on the arc length.

11. The method for determining the stove's gear position as described in claim 10, characterized in that, The valve body operating rod has a downward pressing length in the Z-axis direction, and the determination method includes: When the displacement value S Z When the displacement value is greater than the downward pressure length, the main control module determines that an electrical spark has been generated. When the displacement value S Y When the absolute value of is greater than 0, the main control module determines that ignition has occurred.

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