A magnetic control knob and a gas stove fire power regulation method based on the magnetic control knob

Abstract

The application belongs to the field of gas stove fire power regulation, and discloses a magnetic control knob and a gas stove fire power regulation method based on the magnetic control knob, which realizes stepless continuous angle detection and arbitrary position control. Different from the traditional magnetic control knob which realizes gear switching by repulsive force change, the application adopts an angle signal as a control basis, can realize continuous angle detection in the range of 0°-360°, does not need to reset, judges whether it is a qualified rotation operation by judging the speed change amount of the angle, for example, whether the change amount of the angle in every 10 ms is less than 10°, the gear is uniformly larger or smaller, and there is no sudden abnormal operation, and the accurate control can be carried out at any rotation position, and the user experience is better.

Description

Technical Field

[0001] This invention belongs to the field of gas stove firepower control, specifically relating to a magnetic control knob and a gas stove firepower control method based on the magnetic control knob. Background Technology

[0002] In the fields of home appliances and industrial control equipment, rotary control devices are widely used to adjust parameters such as temperature, power, and volume.

[0003] Traditional mechanical knobs typically require a through-hole in the appliance panel to directly connect mechanically to the potentiometer or control valve inside. This design has the following drawbacks: First, the through-hole disrupts the integrity and uniformity of the panel, making cleaning difficult, and allowing oil and spills to easily enter the appliance, causing corrosion of components and even safety hazards; second, mechanical knobs are subject to mechanical wear, which affects their accuracy and lifespan over time; and third, disassembly and assembly are cumbersome.

[0004] While pure magnetic knobs solve some of the problems of traditional mechanical knobs, they also have issues such as unstable fixing leading to excessive wobbling during rotation and poor tactile feedback.

[0005] Existing magnetically controlled knobs typically employ a ring magnet or a combination of multiple magnets, using a Hall effect sensor to detect changes in the magnetic field and thus sense the knob's rotation angle. In some existing technologies, magnetically controlled knobs use two independent layers of magnets for gear shifting. When the knob is turned, the magnetic poles on opposite surfaces of the two layers of magnets gradually move closer and then further apart, shifting gears through changes in the repulsive force between the magnets. However, in this approach, the repulsive force curve often exhibits non-linear characteristics, making it difficult to achieve high-precision continuous angle detection and resulting in limited angular resolution.

[0006] Furthermore, traditional magnetic induction control methods define one rotation as 360°, and the number of gears is usually divided into 3, 6, or 12 gears depending on the actual user's needs. The angle is defined as 120°, 60°, or 30° per gear. Taking 12 gears as an example, the angle per gear is 30°. When controlling the stove's firepower, if the knob is rotated too quickly or jumps directly from a large angle to a small angle (for example, turning the knob clockwise from 300 degrees to 20 degrees), there may be a risk of deflagration or incomplete combustion of gas, which could lead to safety accidents. Ignition failure is also a frequent occurrence. Summary of the Invention

[0007] The purpose of this invention is to provide a magnetic control knob and a gas stove fire control method based on the magnetic control knob, so as to overcome the problems of unreliable fixation, uneven rotation, insufficient magnetic control accuracy, and explosion or incomplete combustion of gas caused by excessive or insufficient rotation angle in the existing structure. It achieves both reliable fixation and smooth rotation, and can improve detection accuracy and stability as well as the reliability in actual use.

[0008] To achieve the above objectives, the technical solution adopted by the present invention is as follows:

[0009] In one aspect, a magnetic control knob is provided, comprising: a knob body, a cylindrical sensing magnet, a bearing, a ring-shaped fixing magnet, and a back cover;

[0010] The bottom surface of the knob body is recessed to form a first receiving cavity, and a cylindrical assembly protruding towards the bottom surface of the knob body is provided inside the first receiving cavity. The hollow cylindrical assembly serves as a second receiving cavity.

[0011] The cylindrical induction magnet is embedded in the second receiving cavity. The N pole and S pole of the cylindrical induction magnet are respectively placed on the left and right sides of the cylindrical induction magnet, and the dividing plane between the N pole and the S pole passes through the axis of the cylindrical induction magnet.

[0012] The inner ring of the bearing is fitted onto the outer wall of the cylindrical assembly;

[0013] The annular fixing magnet is fixed on the back cover and is attracted and fixed to the outer ring of the bearing by magnetic force.

[0014] Preferably, the axis of the cylindrical induction magnet coincides with the rotation axis of the knob body.

[0015] Preferably, a magnetic induction chip is provided on the outside of the magnetic control knob, and the magnetic induction chip outputs the corresponding angle according to the rotation of the cylindrical induction magnet.

[0016] Secondly, a method for controlling the flame of a gas stove based on a magnetic control knob is provided, including:

[0017] Upon power-on initialization, the cumulative rotation time, current angle, and angle change are all zero.

[0018] The system monitors in real time whether the magnetic control knob changes angle. If no angle change occurs, the gas stove firepower remains constant. Otherwise, the cumulative rotation time increases, and the current angle and the amount of angle change are recorded at intervals until the magnetic control knob stops changing angle.

[0019] According to the recording order, take an angle change. If the angle change is greater than the angle change threshold, the angle change is determined to be an invalid operation, the number of valid operations, the cumulative rotation time and the angle change are all set to zero, and the gas stove firepower is kept unchanged.

[0020] Otherwise, the number of valid counts is incremented by one, and the next angle change is taken and judged again according to the recorded order until the number of valid counts reaches the valid threshold. Then, the angle change is judged as a valid operation, the number of valid counts, the cumulative rotation time, and the angle change are all set to zero, and the gas stove firepower is adjusted to increase or decrease by one level according to whether the angle change increases or decreases.

[0021] Preferably, the gas stove has an upper limit for its firepower setting; if the upper limit has been reached, the firepower cannot be increased further. The gas stove also has a lower limit for its firepower setting; if the lower limit has been reached and the firepower is further decreased, a fire-off operation is triggered.

[0022] Preferably, power-on and power-off operations at any setting are achieved via the power button: if the current state is power off, a user's click signal on the power button triggers power-on; if the current state is power-on, a user's click signal on the power button triggers power-off.

[0023] Preferably, the angle change is either an increase or a decrease, and the determination process is as follows:

[0024] If the recorded current angles during the current angle change process of the magnetic control knob are increasing or decreasing in sequence, then the angle change is determined to be either increasing or decreasing.

[0025] Otherwise, using 360 degrees as the boundary, the recorded current angle is divided into two groups. If the current angles in both groups are increasing or decreasing in the recording order, then the angle change is judged to be either increasing or decreasing.

[0026] Preferably, the magnetic control knob includes a knob body, a cylindrical induction magnet, a bearing, an annular fixing magnet, and a back cover;

[0027] The bottom surface of the knob body is recessed to form a first receiving cavity, and a cylindrical assembly protruding towards the bottom surface of the knob body is provided inside the first receiving cavity. The hollow cylindrical assembly serves as a second receiving cavity.

[0028] The cylindrical induction magnet is embedded in the second receiving cavity. The N pole and S pole of the cylindrical induction magnet are respectively placed on the left and right sides of the cylindrical induction magnet, and the dividing plane between the N pole and the S pole passes through the axis of the cylindrical induction magnet.

[0029] The inner ring of the bearing is fitted onto the outer wall of the cylindrical assembly;

[0030] The annular fixing magnet is fixed on the back cover and is attracted and fixed to the outer ring of the bearing by magnetic force.

[0031] Preferably, the axis of the cylindrical induction magnet coincides with the rotation axis of the knob body.

[0032] Preferably, a magnetic induction chip is installed below the mounting panel of the gas stove. The magnetic induction chip outputs the corresponding angle according to the rotation of the cylindrical induction magnet.

[0033] The magnetic control knob and the gas stove flame control method based on the magnetic control knob provided by this invention have the following advantages compared with the prior art:

[0034] (1) High angle detection accuracy. The structure employs a radial (left-right) polarity distribution of cylindrical magnets (NS). Compared to axial magnetization (NS vertically distributed) or symmetrical distribution on the same plane, the radially magnetized cylindrical magnets generate a more regular magnetic field distribution in the circumferential direction. The magnetic field components exhibit excellent sine / cosine characteristics as the rotation angle changes. Combined with a magnetic induction chip for signal acquisition, and after arctangent calculation, a high-linearity angle output can be obtained. Combined with signal processing filtering and calibration algorithms, the angle detection accuracy of this invention can reach 5°, far exceeding the typical accuracy level of traditional magnetic control knobs. Simultaneously, the angle output method (rather than the gear output method) avoids the quantization error introduced by threshold judgment.

[0035] (2) Simple structure and controllable cost. High-precision angle detection can be achieved by using a single cylindrical radial magnet. The magnetic induction element can be a low-cost magnetic induction chip. The overall structure is compact, with few parts, and the production cost is controllable. It is easy to promote and apply to various electrical equipment.

[0036] (3) Achieve stepless continuous angle detection and arbitrary position control. Unlike traditional magnetic control knobs that rely on repulsive force changes to switch gears (which can only determine the position at a few discrete gear points), this invention uses angle signals as the control basis, which can achieve continuous angle detection in the range of 0°-360° without the need for a reset operation. By judging the speed change of the angle (for example, whether the change of the angle within 10ms is less than 10° to determine whether it is a qualified rotation operation, the gear increases or decreases uniformly, and there will be no abnormal operation with sudden changes), precise control can be performed at any rotation position, resulting in a better user experience. Attached Figure Description

[0037] Figure 1 This is a schematic diagram of an existing traditional knob structure;

[0038] Figure 2 This is an exploded view of the magnetic control knob of the present invention;

[0039] Figure 3 This is a cross-sectional view of the magnetic control knob of the present invention;

[0040] Figure 4 This is a schematic diagram of the magnetic pole distribution of the cylindrical induction magnet of the present invention;

[0041] Figure 5 This is a schematic diagram showing the positional relationship between the cylindrical induction magnet and the magnetic induction chip of the present invention;

[0042] Figure 6 This is a schematic diagram illustrating the use of the magnetic control knob of the present invention mounted on a glass panel;

[0043] Figure 7The flowchart shows the gas stove firepower control method based on a magnetic control knob according to the present invention.

[0044] Figure 8 This is a diagram showing the positional relationship between the magnetic control knob, the glass, and the bottom control panel of this invention;

[0045] Figure 9 This is a schematic diagram illustrating the usage environment of the magnetic control knob of the present invention.

[0046] In the diagram: 1. Knob body; 2. Cylindrical induction magnet; 3. Bearing; 4. Ring-shaped fixing magnet; 5. Back cover; 6. Snap ring. Detailed Implementation

[0047] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0048] It should be noted that when a component is said to be "connected" to another component, it can be directly connected to the other component or it can be connected to a component in between; when a component is said to be "fixed" to another component, it can be directly fixed to the other component or it can be connected to a component in between.

[0049] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to limit the invention.

[0050] Example 1:

[0051] like Figure 1 As shown, traditional knob installation requires cutting an opening in the glass. The traditional knob structure passes through the glass and is fixed to the bottom structure, making it difficult to disassemble. Most of the components under the glass need to be removed to expose the knob's disassembly clips, which increases the workload of after-sales personnel, reduces work efficiency, causes customer dissatisfaction with the extensive disassembly, and seriously affects the quality of after-sales service.

[0052] In addition, while pure magnetic knobs solve some of the problems of traditional mechanical knobs, they suffer from issues such as unstable fixation leading to excessive wobbling during rotation and poor tactile feedback. Existing magnetically controlled knobs typically use a ring magnet or a combination of multiple magnets, and rely on Hall effect sensors to detect changes in the magnetic field to sense the knob's rotation angle, but this results in low rotational accuracy.

[0053] In response, this embodiment designs a high-precision magnetic control knob that is simple in structure, easy to assemble and disassemble, rotates smoothly, and is reliably fixed. It aims to solve the problems of poor sealing, easy wear, and cumbersome disassembly and assembly of existing perforated knobs, as well as the large rotational wobbling, poor feel, and low rotational gear accuracy of pure magnetic knobs.

[0054] In this embodiment, the magnetically controlled knob is fixed by the attraction between the annular fixing magnet on the back cover and the magnet inside the glass. The knob body is fitted onto the bearing, allowing for smooth rotation independent of the fixed part. This embodiment uses a layered structure, making the rotating and fixed parts of the magnetically controlled knob independent, unlike existing pure magnetic structures which use a combined rotating and fixed structure. The layered structure of this embodiment provides both smooth rotation and reliable fixation. Furthermore, to improve rotational accuracy, the cylindrical induction magnet is radially magnetized, with the North Pole (N pole) and South Pole (S pole) distributed radially to the left and right, respectively, on the left and right sides of the cylindrical induction magnet. The cylindrical induction magnet is fixed inside the knob body and rotates synchronously with the knob shell.

[0055] like Figure 2 and Figure 3 As shown, the magnetic control knob of this embodiment includes a knob body 1, a cylindrical induction magnet 2, a bearing 3, an annular fixing magnet 4, and a back cover 5.

[0056] The bottom surface of the knob body 1 is recessed to form a first receiving cavity, and a cylindrical assembly protruding towards the bottom surface of the knob body 1 is provided inside the first receiving cavity. The hollow cylindrical assembly serves as a second receiving cavity. In this embodiment, the knob body 1 is cylindrical. In other embodiments, the shape of the knob body 1 can be varied, such as a cube. In this embodiment, the first receiving cavity (without considering the protruding cylindrical assembly) is cylindrical to facilitate assembly and installation. In other embodiments, as long as it can accommodate components such as the ring-fixed magnet 4 and the back cover 5, the shape of the first receiving cavity is not strictly limited. For example, it can also be frustum-shaped.

[0057] The cylindrical induction magnet 2 is embedded in the second receiving cavity. Since the cylindrical induction magnet 2 needs to rotate synchronously with the knob body 1, the shape of the second receiving cavity is adapted to the cylindrical induction magnet 2 to fix the two together. Of course, in other embodiments, provided that the cylindrical induction magnet 2 can be embedded in the second receiving cavity, other assemblies can be introduced to fix the two together, thus not limiting the shape of the second receiving cavity.

[0058] like Figure 4As shown, the cylindrical induction magnet 2 in this embodiment is cylindrical. Its N and S poles are radially distributed to the left and right sides, respectively. The boundary plane between the N and S poles passes through the axis of the cylindrical induction magnet 2, and this axis coincides with the rotation axis of the knob body 1. With this configuration, when the cylindrical permanent magnet rotates with the knob housing, its magnetic field undergoes a continuous and uniform change around the rotation axis in space, which is beneficial for the magnetic induction element to obtain an angle output signal with good linearity. The change in the magnetic field generated by the rotation of the cylindrical induction magnet 2, combined with the electrical signal output by the magnetic induction element corresponding to the rotation angle, ensures the non-contact detection advantage of the magnetically controlled knob while further improving the detection accuracy and stability of the rotation angle.

[0059] The inner ring of bearing 3 is fitted onto the outer wall of the cylindrical assembly. Since the inner ring of bearing 3 needs to rotate synchronously with the knob body, the shape of the outer wall of the cylindrical assembly is adapted to the inner ring of bearing 3 to secure them together. Of course, in other embodiments, other assemblies can be introduced to secure them, thus not limiting the shape of the outer wall of the cylindrical assembly. In this embodiment, a retaining spring 6 is embedded in the cylindrical assembly to limit the movement of the inner ring of bearing 3. Furthermore, bearing 3 is an existing structure, therefore its internal structure is not specifically shown in the sectional view.

[0060] The annular fixing magnet 4 is fixed to the back cover and is magnetically attracted to the outer ring of the bearing 3. In this embodiment, the size of the annular fixing magnet 4 is adapted to the size of the outer ring of the bearing 3, and it is directly attracted to the side of the outer ring of the bearing 3. In other embodiments, the inner wall of the annular fixing magnet 4 may be slightly larger than the outer ring of the bearing 3, and the two are fixed by nesting and attraction. In this embodiment, the back cover 5 includes a planar body and an annular protective plate protruding from one side of the planar body. The annular protective plate forms a cavity for installing the annular fixing magnet 4. The size of the planar body is adapted to the opening size of the first receiving cavity of the knob body. The back cover is directly pressed into the knob body 1, and the planar body of the back cover 5 may slightly protrude from the knob body 1 to facilitate the rotation of the knob body 1. The annular fixing magnet 4 on the back cover 5 is attracted to the magnet inside the glass panel (including the glass and the bottom control panel) to achieve overall fixation, so as to assemble an integrated magnetic control knob structure, and make the knob body 1 separate from the fixed part, so as to achieve smooth rotation of the knob body 1 independently of the fixed part, and the rotation is not affected by the attraction force.

[0061] The magnetically controlled knob in this embodiment is easy to assemble, has a small number of parts, and high assembly efficiency. Furthermore, its simple structure, good sealing, easy assembly and disassembly, and reliable fixation allow users to easily remove the knob from the glass panel for cleaning. The bearing provides low-friction rotation, a smooth feel, and is not easily worn, further improving the accuracy and stability of rotation angle detection while maintaining the non-contact detection advantages of the magnetically controlled knob.

[0062] like Figure 5 As shown, the operation of the magnetic control knob in this embodiment also requires the use of a magnetic induction chip installed under the mounting panel of the gas stove (a glass panel in this embodiment). The magnetic induction chip outputs the corresponding angle based on the rotation of the cylindrical induction magnet 2. The magnetic induction chip can be of the type AS5600, MT6816, or MLX90363. The peripheral circuit structure and usage method of the magnetic induction chip can be implemented according to the technical manual of each magnetic induction chip, and will not be described in detail in this embodiment.

[0063] In this embodiment, the magnetically controlled knob achieves physical decoupling between rotation and positioning: a cylindrical induction magnet 2 is installed inside the receiving cavity of the rotating body 1 for realizing the magnetic control function. A bearing 3 is fixed to the outer wall of the receiving cavity inside the knob body 1 for rotating the body 1. A ring-shaped fixing magnet 4 is installed inside the back cover 5 for adsorption and fixation with the magnet inside the glass panel, such as... Figure 6 As shown. The back cover 5 is installed at the lower opening of the knob body 1 and is connected to the knob body 1. The inner ring of the bearing 3 is fitted onto the annular boss of the rotating body 1, and the outer ring is attracted to the annular fixing magnet inside the back cover 5, providing independent rotation, so that the knob body 1 only undertakes the axial rotation function of the knob assembly and does not participate in the fixed positioning.

[0064] Example 2:

[0065] Traditional magnetic induction control methods define one rotation of the magnetic knob as 360°. Depending on the number of settings required by the user, these are typically divided into 3, 6, or 12 levels, with each level defined as 120°, 60°, or 30°. For example, with 12 levels, each level is 30°. Level 1 is arbitrarily defined as 0°-30°, level 2 as 31°-60°, and so on. This control method, when controlling the stove's heat, may pose a risk of explosion or incomplete combustion if the knob is rotated too quickly or jumps directly from a large angle to a small angle (e.g., from 300° to 20°). Therefore, existing magnetic control methods need optimization to improve the accuracy of rotation angle changes and reliability in actual use.

[0066] To address this, this embodiment provides a gas stove fire control method based on a magnetic control knob. The change in the fire level is determined by the change in the rotation angle and speed. This method can be based on the magnetic control knob disclosed in Embodiment 1, using a cylindrical magnet with N / S polarity distributed left and right, combined with a magnetic induction chip to achieve angle detection. Of course, this method can also be implemented based on other magnetic control buttons capable of detecting angles.

[0067] like Figure 7 As shown, the method in this embodiment specifically includes the following steps:

[0068] Upon power-on initialization, the cumulative rotation time, current angle, and angle change are all zero.

[0069] The system monitors in real time whether the magnetic control knob changes angle. If no angle change occurs, the gas stove firepower remains constant. Otherwise, the cumulative rotation time increases, and the current angle and the amount of angle change are recorded at intervals until the magnetic control knob stops changing angle.

[0070] According to the recording order, take an angle change. If the angle change is greater than the angle change threshold, the angle change is determined to be an invalid operation. The number of valid operations, the cumulative rotation time, and the angle change are all set to zero, and the gas stove firepower is kept unchanged.

[0071] Otherwise, the valid count is incremented by one, and the next angle change is retrieved and judged again according to the recorded order until the valid count reaches the valid threshold. If so, the angle change is considered a valid operation, and the valid count, cumulative rotation time, and angle change are all set to zero. The gas stove's firepower is then adjusted by one level based on whether the angle change increased or decreased. If no invalid operation occurs during the judgment process, but the cumulative valid count has not reached the valid threshold, the angle change is still considered invalid to avoid the angle change being too small.

[0072] This embodiment of the method judges the real-time change in angle. For example, it defines that if the change in angle is less than the angle change threshold of 10° every 10ms, it is considered a qualified angle rotation after 10 consecutive times. Then, the firepower is adjusted. This will prevent the problem of the firepower level from changing indiscriminately. The adjustment of the firepower level will be smoother, the gas can be fully burned, and the user experience will be better.

[0073] like Figure 8 As shown, the method in this embodiment operates on the bottom control panel located below the glass panel of the gas stove. This control panel is a standard feature on gas stoves, including components such as the main control chip and a magnetic induction chip, which will not be described in detail in this embodiment. Specifically, the method operates on the main control chip, which communicates with the magnetic induction chip via IIC communication to obtain real-time angles. When the user rotates the magnetic control knob, the main chip obtains the angle value in real time and determines whether the rotation is a valid operation or a mistake based on the change in angle and the time elapsed. If it is a valid operation, the gas stove's firepower level is adjusted accordingly.

[0074] like Figure 9 As shown, for user convenience, a power on / off button is also installed on the glass panel of the gas stove (e.g., Figure 9The button within the red box is the power button, controlled by the user's click, with the click signal fed back to the main control chip. Powering on and turning off the engine at any setting are achieved via the power button: if the engine is currently off, a click signal from the user triggers power on; if the engine is currently on, a click signal from the user triggers power off.

[0075] This embodiment features stepless adjustment, but considering that the actual firepower of a gas stove has upper and lower limits, this embodiment divides the firepower of the gas stove into levels, such as 3, 6, or 12 levels. During gas stove firepower control, if the upper limit (e.g., level 12) has been reached, the level cannot be increased further; if the lower limit (e.g., level 1) has been reached, and the level is further decreased, a flameout operation is triggered.

[0076] Since the magnetic field line chip outputs an angle of 0°-360°, in order to handle the situation of spanning 360° and 0°, this embodiment provides a process for determining whether the angle change is increasing or decreasing as follows:

[0077] If the recorded current angles during the current magnetic control knob angle change process are either increasing (e.g., recorded angles are 30°, 35°, 40°, 45°) or decreasing (e.g., recorded angles are 45°, 40°, 35°, 30°), then the angle change is determined to be either increasing or decreasing. Otherwise, the recorded current angles are divided into two groups with 360 degrees as the boundary. If the current angles in both groups are either increasing or decreasing in the recording order, then the angle change is determined to be either increasing or decreasing. For example, if the recorded angles are 348°, 353°, 358°, 3°, 8°, and 13°, then they are divided into two groups: 348°, 353°, and 358° as one group, and 3°, 8°, and 13° as another group. Since both groups represent increasing angles, the angle change is judged to be increasing. Conversely, if the recorded angles are 13°, 8°, 3°, 358°, 353°, and 348°, then they are divided into two groups: 13°, 8°, and 3° as one group, and 358°, 353°, and 348° as another group. Since both groups represent decreasing angles, the angle change is judged to be decreasing.

[0078] This embodiment of the method completely eliminates the influence of magnetic fluctuations on rotational accuracy through the concentric nested layout of the bearing and magnetic components. It achieves multiple technological advancements, including no knob wobble, a fully sealed panel without perforations, quick and easy manual disassembly and assembly, higher magnetic control precision, and multiple adjustment levels. The speed-based judgment of the level switching makes the transition smoother and more natural. It also avoids excessive or insufficient changes in the adjustment angle, thus avoiding the risk of explosion or incomplete combustion of gas that could lead to safety accidents, and also improves the ignition success rate.

[0079] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this invention.

[0080] The above embodiments merely illustrate several implementation methods of the present invention, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the invention. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these all fall within the protection scope of the present invention. Therefore, the protection scope of the present invention should be determined by the appended claims.

Claims

1. A magnetically controlled knob, characterized in that, include: Knob body, cylindrical sensing magnet, bearing, ring-shaped fixing magnet and back cover; The bottom surface of the knob body is recessed to form a first receiving cavity, and a cylindrical assembly protruding towards the bottom surface of the knob body is provided inside the first receiving cavity. The hollow cylindrical assembly serves as a second receiving cavity. The cylindrical induction magnet is embedded in the second receiving cavity. The N pole and S pole of the cylindrical induction magnet are respectively placed on the left and right sides of the cylindrical induction magnet, and the dividing plane between the N pole and the S pole passes through the axis of the cylindrical induction magnet. The inner ring of the bearing is fitted onto the outer wall of the cylindrical assembly; The annular fixing magnet is fixed on the back cover and is attracted and fixed to the outer ring of the bearing by magnetic force.

2. The magnetically controlled knob according to claim 1, characterized in that, The axis of the cylindrical induction magnet coincides with the rotation axis of the knob body.

3. The magnetically controlled knob according to claim 1, characterized in that, A magnetic induction chip is installed on the outside of the magnetic control knob. The magnetic induction chip outputs the corresponding angle according to the rotation of the cylindrical induction magnet.

4. A method for controlling the flame of a gas stove based on a magnetic control knob, characterized in that, include: Upon power-on initialization, the cumulative rotation time, current angle, and angle change are all zero. The gas stove maintains its firepower if the angle of the magnetic control knob does not change in real time. Otherwise, the cumulative rotation time increases, and the current angle and the amount of angle change are recorded at intervals until the magnetic control knob stops changing the angle; According to the recording order, take an angle change. If the angle change is greater than the angle change threshold, the angle change is determined to be an invalid operation, the number of valid operations, the cumulative rotation time and the angle change are all set to zero, and the gas stove firepower is kept unchanged. Otherwise, the number of valid counts is incremented by one, and the next angle change is taken and judged again according to the recorded order until the number of valid counts reaches the valid threshold. Then, the angle change is judged as a valid operation, the number of valid counts, the cumulative rotation time, and the angle change are all set to zero, and the gas stove firepower is adjusted to increase or decrease by one level according to whether the angle change increases or decreases.

5. The gas stove flame control method based on a magnetic control knob according to claim 4, characterized in that, The gas stove has an upper limit for its firepower setting. If the upper limit has been reached, the firepower cannot be increased further. The gas stove also has a lower limit for its firepower setting. If the lower limit has been reached and the firepower is further decreased, the gas stove will be turned off.

6. The gas stove flame control method based on a magnetic control knob according to claim 4, characterized in that, Powering on and turning off the engine at any setting are achieved via the power button: if the engine is currently off, a user click signal on the power button will trigger power-on; if the engine is currently on, a user click signal on the power button will trigger power-off.

7. The gas stove flame control method based on a magnetic control knob according to claim 4, characterized in that, The angle change is either an increase or a decrease, and the determination process is as follows: If the recorded current angles during the current angle change process of the magnetic control knob are increasing or decreasing in sequence, then the angle change is determined to be either increasing or decreasing. Otherwise, using 360 degrees as the boundary, the recorded current angle is divided into two groups. If the current angles in both groups are increasing or decreasing in the recording order, then the angle change is judged to be either increasing or decreasing.

8. The gas stove flame control method based on a magnetic control knob according to claim 4, characterized in that, The magnetic control knob includes a knob body, a cylindrical induction magnet, a bearing, a ring-shaped fixing magnet, and a back cover; The bottom surface of the knob body is recessed to form a first receiving cavity, and a cylindrical assembly protruding towards the bottom surface of the knob body is provided inside the first receiving cavity. The hollow cylindrical assembly serves as a second receiving cavity. The cylindrical induction magnet is embedded in the second receiving cavity. The N pole and S pole of the cylindrical induction magnet are respectively placed on the left and right sides of the cylindrical induction magnet, and the dividing plane between the N pole and the S pole passes through the axis of the cylindrical induction magnet. The inner ring of the bearing is fitted onto the outer wall of the cylindrical assembly; The annular fixing magnet is fixed on the back cover and is attracted and fixed to the outer ring of the bearing by magnetic force.

9. The gas stove flame control method based on a magnetic control knob according to claim 8, characterized in that, The axis of the cylindrical induction magnet coincides with the rotation axis of the knob body.

10. The gas stove flame control method based on a magnetic control knob according to claim 8, characterized in that, A magnetic induction chip is installed below the mounting panel of the gas stove. The magnetic induction chip outputs the corresponding angle based on the rotation of the cylindrical induction magnet.

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