Gas stove

Abstract

This application relates to the field of kitchen appliances technology, and in particular to a gas stove. The gas stove includes a cooktop, a knob, a magnetic induction component, and a control component. The cooktop has a surface, and an assembly space is constructed below the surface. The knob is rotatably connected to the cooktop and protrudes from the surface. The magnetic induction component includes a magnetic part and an induction coil spaced apart, one of which is connected to the knob and rotates with the knob, while the other is fixedly installed in the assembly space. The magnetic part extends radially along the knob. The induction coil extends spirally along the circumference of the knob and is wound around the knob in a loop. Along the axial direction of the knob, the projection of the magnetic part overlaps with the projection of the induction coil, and the dimension of the projection of the magnetic part along the circumference of the knob is smaller than the dimension of the projection of the induction coil along the circumference of the knob. The control component is installed in the assembly space and electrically connected to the induction coil. The control component adjusts the opening and closing of the gas stove and the flame intensity of the gas stove according to the induced current generated by the induction coil to ensure the accuracy of flame intensity control.

Description

Technical Field

[0001] This application relates to the field of kitchen appliances technology, and in particular to a gas stove. Background Technology

[0002] A gas stove consists of a cooktop, on which are mounted burners and knobs. Below the cooktop is a valve body. The knob is mechanically connected to a valve core within the valve body. Turning the knob controls the rotation of the valve core, thus controlling the flame intensity. However, the lever arm between the knob and the valve core is relatively long. Over time, this can cause structural deformation of both the knob and the valve core, resulting in a precision deviation when adjusting the flame intensity and making it impossible to accurately control the flame size. Utility Model Content

[0003] Therefore, it is necessary to provide a gas stove that ensures the precision of firepower adjustment.

[0004] The gas stove includes a cooktop, a knob, a magnetic induction assembly, and a control assembly. The cooktop has a surface, and an assembly space is constructed beneath the surface. The knob is rotatably connected to the cooktop and protrudes from the surface. The magnetic induction assembly includes a magnetic part and an induction coil spaced apart. The magnetic part extends radially along the knob. The induction coil extends spirally along the circumference of the knob and is wound around the knob in a loop. Along the axial direction of the knob, the projection of the magnetic part overlaps with the projection of the induction coil, and the dimension of the projection of the magnetic part along the circumference of the knob is smaller than the dimension of the projection of the induction coil along the circumference of the knob. One of the magnetic part and the induction coil is connected to the knob and rotates with the knob, while the other is fixedly installed in the assembly space. The control assembly is installed in the assembly space and electrically connected to the induction coil. The control assembly is configured to adjust the opening and closing of the gas stove or the flame intensity of the gas stove in response to the current of the induction coil.

[0005] It is understood that rotating the knob causes the magnetic part to rotate relative to the induction coil, which in turn causes the induction coil to cut the magnetic field, generating an induced current. Since the induction coil extends spirally along the circumference of the knob and is wound around it in a loop, the induction coil cuts magnetic field lines at corresponding positions when the magnetic part rotates relative to it. Different directions of relative rotation of the magnetic part result in different directions of the generated induced current; different angles of rotation result in different durations of the generated induced current, corresponding to different flame levels. The control component can adjust the gas stove's on / off state and flame level accordingly based on the direction and duration of the induced current. Throughout the process, the knob is not structurally connected to the control component, preventing structural deformation of the control component and ensuring the accuracy of flame control.

[0006] In one embodiment, the magnetic poles on both sides of the magnetic part are opposite along the circumference of the knob.

[0007] In one embodiment, the magnetic induction assembly includes two magnetic parts, one magnetic part located on one side of the induction coil along the axial direction of the knob, and the other magnetic part located on the other side of the induction coil, with the two magnetic parts facing opposite magnetic poles toward the induction coil.

[0008] In one embodiment, along the radial direction of the knob, the magnetic portion gradually increases in size along the circumferential direction of the knob in a direction outward from the axis of the knob.

[0009] In one embodiment, the induction coil is located on the edge of the magnetic part away from the axis of the knob, along the radial direction of the knob.

[0010] In one embodiment, the gas stove further includes a mounting housing located within the assembly space. The mounting housing is fixedly installed on the inner wall of the stove. The mounting housing has a receiving cavity. One of the induction coil and the magnetic part is located in the receiving cavity, and the other is connected to the knob.

[0011] In one embodiment, the control components are arranged at intervals from the knob along its radial direction.

[0012] In one embodiment, the control component includes a drive element and a control valve connected to the drive element, the drive element being electrically connected to the induction coil;

[0013] The control valve has a first operating condition and a second operating condition. In the first operating condition, the knob rotates forward, causing the magnetic part to rotate forward relative to the induction coil, the induction coil generates a positive current, and the drive member is configured to drive the control valve to open or increase the firepower in response to the positive current signal of the induction coil. In the second operating condition, the knob rotates in reverse, causing the magnetic part to rotate in reverse relative to the induction coil, the induction coil generates a reverse current, and the drive member is configured to drive the control valve to close or decrease the firepower in response to the reverse current signal of the induction coil.

[0014] In one embodiment, the control valve includes a valve body and a valve core rotatably connected to the valve body. The valve body is provided with an air inlet, at least two air outlets, and a valve cavity. The air inlet and the at least two air outlets are spaced apart and communicate with the valve cavity respectively.

[0015] The valve core is installed in the valve cavity, extends circumferentially along the valve cavity and is attached to the cavity wall. The valve core has at least two air holes spaced apart circumferentially along the valve cavity. Each air hole penetrates radially through the valve core and communicates with the valve cavity. The air inlet communicates with the air outlet through the air holes. The size of the at least two air holes increases or decreases circumferentially from the air inlet toward the air outlet along the valve cavity.

[0016] In the first operating condition, the valve core rotates circumferentially from the smaller air hole toward the larger air hole; in the second operating condition, the valve core rotates circumferentially from the larger air hole toward the smaller air hole.

[0017] In one embodiment, the valve cavity wall is provided with a first stop portion and a second stop portion spaced apart along its circumference, and the valve core is provided between the first stop portion and the second stop portion along the circumference of the valve cavity. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of this application or the conventional technology, the drawings used in the description of the embodiments or the conventional technology will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 This is a schematic diagram of the gas stove structure provided in this application;

[0020] Figure 2 This is a schematic diagram of the structure of the magnetic induction component and the knob in the gas stove provided in this application;

[0021] Figure 3 A cross-sectional view showing the interaction between the magnetic induction component and the knob in the gas stove provided in this application;

[0022] Figure 4 This is a schematic diagram of the control component in the gas stove provided in this application;

[0023] Figure 5 This is a cross-sectional view of the control component in the gas stove provided in this application.

[0024] Reference numerals: 100, gas stove; 10, stovetop; 11, countertop; 20, knob; 21, rotating housing; 22, rotary rod; 30, magnetic induction assembly; 31, magnetic part; 32, induction coil; 40, control assembly; 41, drive component; 42, control valve; 421, valve body; 4211, valve chamber; 4212, air inlet; 4213, first stop; 4214, second stop; 422, valve core; 4221, air hole; 51, mounting housing; 511, receiving cavity; 52, connecting arm; 521, first arm body; 522, second arm body; 60, rotating support component. Detailed Implementation

[0025] To make the above-mentioned objectives, features, and advantages of this application more apparent and understandable, the specific embodiments of this application are described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of this application. However, this application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this application. Therefore, this application is not limited to the specific embodiments disclosed below.

[0026] It should be noted that when a component is referred to as being "fixed to," "set on," or "properly placed on" another component, it can be directly on the other component or there may be an intermediate component. When a component is considered to be "connected to" another component, it can be directly connected to the other component or there may be an intermediate component present. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used in this application's specification are for illustrative purposes only and do not represent the only possible implementation.

[0027] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0028] In this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature and the second feature are in indirect contact through an intermediate medium. Furthermore, "above," "over," and "on top" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0029] Unless otherwise defined, all technical and scientific terms used in this application have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used in this application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. The term "and / or" as used in this application includes any and all combinations of one or more of the associated listed items.

[0030] Please see Figures 1 to 5 This application provides a gas stove 100, which includes a stove 10, a countertop 11, an assembly space below the countertop 11, and a burner on the countertop 11 for placing and heating cookware.

[0031] like Figure 1 As shown, the gas stove 100 also includes a knob 20, which is rotatably connected to the stove 10 and protrudes from the countertop 11. By rotating the knob 20, the opening and closing of the gas stove 100 and the firepower of the gas stove 100 can be controlled and adjusted.

[0032] like Figure 2 and Figure 3 As shown, in a specific embodiment, the gas stove 100 includes a magnetic induction component 30, which includes a magnetic part 31 and an induction coil 32 spaced apart. The magnetic part 31 extends radially along the knob 20; the induction coil 32 extends spirally along the circumference of the knob 20 and is wound around the knob 20 in a ring shape; along the axial direction of the knob 20, the projection of the magnetic part 31 overlaps with the projection of the induction coil 32, and the size of the projection of the magnetic part 31 along the circumference of the knob 20 is smaller than the size of the projection of the induction coil 32 along the circumference of the knob 20; one of the magnetic part 31 and the induction coil 32 is connected to the knob 20 and rotates with the knob 20, while the other is fixedly installed in the assembly space;

[0033] Thus, as the knob 20 rotates, one of the magnetic part 31 and the induction coil 32 connected to the knob 20 can move to different positions along the circumference of the knob 20. That is, the magnetic part 31 and the induction coil 32 move relative to each other, thereby causing the induction coil 32 to generate an induced current. The different directions in which the magnetic part 31 rotates relative to the induction coil 32 along the circumference of the knob 20 can cause the induction coil 32 to generate an induced current in a corresponding direction. The angle at which the magnetic part 31 rotates relative to the magnetic induction component 30 along the circumference of the knob 20 also affects the duration of the continuous generation of the induced current. For example, the larger the angle at which the magnetic part 31 rotates relative to the magnetic induction component 30, the longer the duration of the induced current generation, and the greater the degree of adjustment required for the heat output.

[0034] In a further embodiment, the gas stove 100 includes a control component 40 installed within an assembly space and electrically connected to an induction coil 32. The control component 40 is configured to adjust the on / off state of the gas stove 100 or the flame intensity of the gas stove 100 in response to the current in the induction coil 32. For example, the on / off state of the gas stove 100 is controlled according to the direction of the induced current, and the degree of flame intensity adjustment is controlled according to the duration of the induced current, thereby achieving regulation of the flame intensity.

[0035] In summary, through the cooperation of the magnetic part 31 and the induction coil 32, when the knob 20 is rotated, it drives the magnetic part 31 to rotate relative to the induction coil 32, thereby generating current in the induction coil 32 at different positions. By controlling the direction and angle of rotation of the knob 20, the direction and duration of the induced current are controlled accordingly. The control component 40 adjusts the firepower of the gas stove 100 based on the generated induced current, thus achieving precise control of the firepower. Throughout the entire process, there is no direct structural connection between the knob 20 and the control component 40, and prolonged use will not cause deformation of the mechanical structure that would affect the accuracy of firepower adjustment.

[0036] In an optional embodiment, the magnetic poles on both sides of the magnetic part 31 are opposite along the circumference of the knob 20, that is, one side of the magnetic part 31 is the N pole and the other side is the S pole, and the induction coil 32 cuts the magnetic field lines along the circumference of the knob 20.

[0037] like Figure 2 and Figure 3 As shown, in another optional embodiment, the magnetic induction assembly 30 includes two magnetic parts 31. Along the axial direction of the knob 20, one magnetic part 31 is located on one side of the induction coil 32, and the other magnetic part 31 is located on the other side of the induction coil 32. The magnetic poles of the two magnetic parts 31 facing the induction coil 32 are opposite. For example, of the two magnetic parts, one has the N pole facing the induction coil 32, and the other has the S pole facing the induction coil 32.

[0038] In a specific embodiment, the magnetic induction component 30 includes a magnetic block, through which a magnetic part 31 is formed. Alternatively, the magnetic induction component 30 includes a U-shaped magnet, with magnetic parts 31 of different magnetic poles formed at both ends of the U-shaped magnet and disposed on both sides of the induction coil 32.

[0039] like Figure 2 and Figure 3As shown, in a specific embodiment, the knob 20 includes a rotating rod 22 and a rotating housing 21 sleeved on the rotating rod 22. The rotating rod 22 is rotatably connected to the stove 10, and the rotating housing 21 is located above the countertop 11. Different sized heat level indicators are provided on the knob 20 or the countertop 11. The user rotates the knob 20 to align it with the heat level indicator, thus switching the heat level. In a specific embodiment, a rotating support 60 is installed between the rotating rod 22 and the stove 10 to support the rotation of the rotating rod 22; for example, the rotating support 60 is a bearing.

[0040] For example, the magnetic part 31 is connected to the rotating rod 22, and the induction coil 32 is wound around the rotating rod 22 to facilitate direct assembly in the assembly space, which is convenient and quick.

[0041] In a specific embodiment, along the radial direction of the knob 20, the magnetic part 31 gradually increases in size from the axis of the knob 20 outwards along the circumferential dimension of the knob 20, so that the magnetic field area gradually increases from the axis of the knob 20 outwards along the radial direction of the knob 20. For example, the magnetic part 31 is fan-shaped.

[0042] In a specific embodiment, along the radial direction of the knob 20, the induction coil 32 is disposed on the edge of the magnetic part 31 away from the axis of the knob 20, so as to adapt to the structure of the magnetic part 31 gradually increasing in the radial direction of the knob 20 outward from the axis of the knob 20, so that the length of the induction coil 32 used to cut the magnetic field is longer, which is beneficial to quickly sensing the changes in the magnetic field lines.

[0043] like Figure 2 and Figure 3 As shown, in a specific embodiment, the gas stove 100 also includes a mounting housing 51 located in the assembly space. The mounting housing 51 is fixedly installed on the inner wall of the stove 10. The mounting housing 51 has a receiving cavity 511. One of the induction coil 32 and the magnetic part 31 is located in the receiving cavity 511, and the other is connected to the knob 20. The mounting housing 51 provides support and facilitates assembly and fixation.

[0044] like Figure 2 and Figure 3 As shown, in a specific embodiment, the mounting housing 51 has a connecting arm 52 protruding on its radially outward side, and the mounting housing 51 is connected to the inner wall of the stove 10 through the connecting arm 52.

[0045] like Figure 2 and Figure 3 As shown, in a specific embodiment, the connecting arm 52 includes a first arm body 521 and a second arm body 522 connected to the first arm body 521. The first arm body 521 and the second arm body 522 are set at an angle. The end of the first arm body 521 away from the second arm body 522 is connected to the mounting housing 51, and the end of the second arm body 522 away from the first arm body 521 is connected to the stove 10.

[0046] In a specific embodiment, the control components 40 are arranged at intervals from the knobs 20 along the radial direction of the knobs 20. This prevents oil stains on the tabletop 11 from seeping into the assembly space through the knobs 20 from directly entering and adhering to the control components 40, thus protecting the control components 40 and extending their service life.

[0047] like Figure 4 and Figure 5 As shown, in a specific embodiment, the control component 40 includes a drive element 41 and a control valve 42 connected to the drive element 41. The drive element 41 is electrically connected to the induction coil 32, and the current generated by the induction coil 32 can be input to the drive element 41. The drive element 41 adjusts the opening and closing of the control valve 42 and controls the flow rate according to the direction of the input induced current. For example, the drive element 41 can be a motor.

[0048] Furthermore, the control valve 42 has a first operating condition and a second operating condition. In the first operating condition, the knob 20 rotates forward, causing the magnetic part 31 to rotate forward relative to the induction coil 32. The induction coil 32 generates a positive current, and the drive member 41 is configured to drive the control valve 42 to open or increase the heat output in response to the positive current signal from the induction coil 32. In the second operating condition, the knob 20 rotates in reverse, causing the magnetic part 31 to rotate in the opposite direction relative to the induction coil 32, i.e., rotating in the opposite direction to the forward rotation. The induction coil 32 generates a reverse current, and the drive member 41 is configured to drive the control valve 42 to close or decrease the heat output in response to the reverse current signal from the induction coil 32. Thus, by switching the rotation direction of the magnetic part 31, the current direction of the induction coil 32 can be controlled, thereby switching the opening and closing of the control valve 42 and adjusting the flow rate, making operation simple.

[0049] In a specific embodiment, the gas stove 100 also includes a rectifier and a voltage regulator. The induction coil 32 is electrically connected to the rectifier, the voltage regulator and the drive unit 41 in sequence. The rectifier can process the input current and filter out interference and fluctuations. The voltage regulator can adjust the voltage so that the output voltage is within the set range.

[0050] like Figure 5As shown, in a specific embodiment, the control valve 42 includes a valve body 421 and a valve core 422 rotatably connected to the valve body 421. The valve body 421 is provided with an air inlet 4212, at least two air outlets, and a valve cavity 4211. The air inlet 4212 and the at least two air outlets are spaced apart and communicate with the valve cavity 4211 respectively. The valve core 422 is installed in the valve cavity 4211, extends circumferentially along the valve cavity 4211, and is attached to the cavity wall of the valve cavity 4211. The valve core 422 is constructed with at least two air holes 4221 spaced apart circumferentially along the valve cavity 4211. Each air hole 4221 penetrates radially along the valve core 422 and communicates with the valve cavity 4211. The air inlet 4212 communicates with the air outlet through the air holes 4221. The size of the at least two air holes 4221 increases or decreases circumferentially along the valve cavity 4211 from the air inlet 4212 toward the air outlet.

[0051] Thus, by rotating the valve core 422, the air hole 4221 is connected to the air outlet, thereby connecting the air inlet 4212, valve chamber 4211, air hole 4221, and air outlet to achieve gas delivery. The flame intensity is adjusted by rotating the valve core 422 to connect air holes 4221 of different sizes to the air outlet. Furthermore, the size of at least two air holes 4221 increases or decreases circumferentially along the valve chamber 4211 from the air inlet 4212 towards the air outlet. This configuration allows the size of the air hole 4221 connected to the air outlet to increase or decrease by rotating the valve core 422, thereby gradually increasing or decreasing the gas flow rate to control the gradual increase or decrease of the flame intensity.

[0052] Specifically, in the first operating condition, along the circumference of the valve cavity 4211, the valve core 422 rotates from the smaller gas hole 4221 towards the larger gas hole 4221, gradually increasing the gas flow and thus gradually increasing the flame. In this condition, the larger the rotation angle of the knob 20, the longer the duration of the induced current. After receiving the induced current, the drive component 41 controls the valve core 422 to rotate continuously, and the rotation angle of the valve core 422 is also larger, thus significantly increasing the flame. In the second operating condition, along the circumference of the valve cavity 4211, the valve core 422 rotates from the larger gas hole 4221 towards the smaller gas hole 4221, gradually decreasing the gas flow and thus gradually decreasing the flame. In this condition, the larger the rotation angle of the knob 20, the longer the duration of the induced current. After receiving the induced current, the drive component 41 controls the valve core 422 to rotate continuously, and the rotation angle of the valve core 422 is also larger, thus significantly decreasing the flame.

[0053] like Figure 5As shown, in a specific embodiment, the cavity wall of the valve chamber 4211 is provided with a first stop portion 4213 and a second stop portion 4214 spaced apart along its circumference. A valve core 422 is provided between the first stop portion 4213 and the second stop portion 4214 along the circumference of the valve chamber 4211. When the valve core 422 rotates to abut against the first stop portion 4213 and the second stop portion 4214, the firepower adjustment is terminated. For example, when the valve core 422 rotates to abut against the first stop portion 4213, the air hole 4221 is disconnected from the air outlet, and when the valve core 422 rotates to abut against the second stop portion 4214, the maximum firepower is achieved.

[0054] In a specific embodiment, a stop block is provided inwardly on the cavity wall of the valve cavity 4211. Along the circumference of the valve cavity 4211, one side of the stop block is a first stop part 4213 and the other side is a second stop part 4214.

[0055] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0056] The embodiments described above are merely illustrative of several implementation methods of this application, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the scope of protection of this application. Therefore, the patent protection scope of this application should be determined by the appended claims.

Claims

1. A gas stove, characterized in that, The gas stove includes: The stove (10) is provided with a countertop (11), and an assembly space is constructed below the countertop (11); A knob (20) is rotatably connected to the stove (10) and protrudes from the countertop (11). The magnetic induction assembly (30) includes a magnetic part (31) and an induction coil (32) spaced apart. The magnetic part (31) extends radially along the knob (20). The induction coil (32) extends spirally along the circumference of the knob (20) and is wound around the knob (20) in a ring shape. Along the axial direction of the knob (20), the projection of the magnetic part (31) overlaps with the projection of the induction coil (32), and the size of the projection of the magnetic part (31) along the circumference of the knob (20) is smaller than the size of the projection of the induction coil (32) along the circumference of the knob (20). One of the magnetic part (31) and the induction coil (32) is connected to the knob (20) and rotates with the knob (20), while the other is fixedly installed in the assembly space. A control component (40) is installed in the assembly space and electrically connected to the induction coil (32). The control component (40) is configured to adjust the opening and closing of the gas stove or the firepower of the gas stove in response to the current of the induction coil (32).

2. The gas stove according to claim 1, characterized in that, Along the circumference of the knob (20), the magnetic poles on both sides of the magnetic part (31) are opposite.

3. The gas stove according to claim 1, characterized in that, The magnetic induction assembly (30) includes two magnetic parts (31). Along the axis of the knob (20), one magnetic part (31) is provided on one side of the induction coil (32), and the other magnetic part (31) is provided on the other side of the induction coil (32). The two magnetic parts (31) are opposite in orientation to the magnetic poles of the induction coil (32).

4. The gas stove according to claim 1, characterized in that, Along the radial direction of the knob (20), the magnetic part (31) gradually increases in size in the direction outward from the axis of the knob (20) along the circumferential dimension of the knob (20).

5. The gas stove according to claim 4, characterized in that, Along the radial direction of the knob (20), the induction coil (32) is located on the edge of the magnetic part (31) away from the axis of the knob (20).

6. The gas stove according to claim 1, characterized in that, The gas stove also includes an installation housing (51) located in the assembly space. The installation housing (51) is fixedly installed on the inner wall of the stove (10). The installation housing (51) is provided with a receiving cavity (511). One of the induction coil (32) and the magnetic part (31) is located in the receiving cavity (511), and the other is connected to the knob (20).

7. The gas stove according to claim 1, characterized in that, Along the radial direction of the knob (20), the control component (40) is arranged at intervals from the knob (20).

8. The gas stove according to claim 1, characterized in that, The control component (40) includes a drive element (41) and a control valve (42) connected to the drive element (41), wherein the drive element (41) is electrically connected to the induction coil (32); The control valve (42) has a first operating condition and a second operating condition. In the first operating condition, the knob (20) rotates in the forward direction, causing the magnetic part (31) to rotate in the forward direction relative to the induction coil (32), the induction coil (32) generates a positive current, and the drive member (41) is configured to drive the control valve (42) to open or increase the firepower in response to the positive current signal of the induction coil (32). In the second operating condition, the knob (20) rotates in the reverse direction, causing the magnetic part (31) to rotate in the reverse direction relative to the induction coil (32), the induction coil (32) generates a reverse current, and the drive member (41) is configured to drive the control valve (42) to close or decrease the firepower in response to the reverse current signal of the induction coil (32).

9. The gas stove according to claim 8, characterized in that, The control valve (42) includes a valve body (421) and a valve core (422) rotatably connected to the valve body (421). The valve body (421) is provided with an air inlet (4212), at least two air outlets and a valve chamber (4211). The air inlet (4212) and the at least two air outlets are spaced apart and communicate with the valve chamber (4211) respectively. The valve core (422) is installed in the valve cavity (4211). The valve core (422) extends circumferentially along the valve cavity (4211) and is attached to the cavity wall of the valve cavity (4211). The valve core (422) is constructed with at least two air holes (4221) spaced apart circumferentially along the valve cavity (4211). Each air hole (4221) penetrates radially along the valve core (422) and communicates with the valve cavity (4211). The air inlet (4212) communicates with the air outlet through the air holes (4221). The size of the at least two air holes (4221) increases or decreases circumferentially along the valve cavity (4211) from the air inlet (4212) toward the air outlet. In the first operating condition, along the circumference of the valve cavity (4211), the valve core (422) rotates from the smaller air hole (4221) toward the larger air hole (4221); in the second operating condition, along the circumference of the valve cavity (4211), the valve core (422) rotates from the larger air hole (4221) toward the smaller air hole (4221).

10. The gas stove according to claim 9, characterized in that, The valve cavity (4211) has a first stop (4213) and a second stop (4214) spaced apart along its circumference. The valve core (422) is provided between the first stop (4213) and the second stop (4214) along the circumference of the valve cavity (4211).

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