Gas valve structure, gas stove gas supply system, gas supply control method and gas stove

Abstract

The application discloses a gas stove gas supply system and a gas stove, which comprises a valve seat provided with an open inner cavity and at least one gas passage for connecting the gas inlet structure and the gas outlet structure; a valve core sliding in the inner cavity of the valve seat and provided with a flow passage, and two ends of the flow passage are used for connecting the gas inlet structure and the gas outlet structure of the valve seat; a pressing plate arranged in the inner cavity of the valve seat and parallel to and abutting against the valve core; a cover plate used for covering the inner cavity of the valve seat; a driving assembly installed on the valve seat and provided with at least one driving part penetrating into the valve seat and linked with the valve core for linear driving; the power source of the driving assembly is controlled by the driving amount of the electric signal; the pressing plate is provided with a pressing plate hole, the pressing plate hole is located in the opening direction of the flow passage, and the flow passage is used for stepless regulation of the flow. The application has the effect of improving the gas control precision.

Description

Technical Field

[0001] This application relates to the field of gas stove technology, and in particular to a gas valve structure, a gas stove gas supply system, a gas supply control method, and a gas stove. Background Technology

[0002] A gas stove is a kitchen appliance that uses fuels such as liquefied petroleum gas (liquid), manufactured gas, or natural gas for direct-fire heating.

[0003] Currently, gas stoves are widely used and familiar to the public worldwide due to their convenience and ease of use. When cooking with a gas stove, the opening of the gas valve needs to be adjusted to control the amount of gas released. However, it is known that adjusting the gas valve opening mostly relies on the user manually rotating the corresponding valve, a method that requires manual operation and suffers from low control precision. Summary of the Invention

[0004] To improve the accuracy of gas control, this application provides a gas valve structure, a gas stove gas supply system, a gas supply control method, and a gas stove.

[0005] Firstly, this application provides a gas valve structure, which adopts the following technical solution:

[0006] A gas valve structure, comprising:

[0007] The valve seat has an open inner cavity and at least one gas passage for connecting the intake structure and the outlet structure.

[0008] The valve core slides within the inner cavity of the valve seat and has a flow channel. One end of the flow channel is used to connect to the gas inlet structure of the valve seat, and the other end is used to connect to the gas outlet structure of the valve seat.

[0009] The pressure plate is located in the inner cavity of the valve seat, parallel to and fitting the valve core;

[0010] A cover plate, detachably attached to the valve seat, for covering the inner cavity of the valve seat; and,

[0011] A drive assembly is mounted on a valve seat, and at least one drive part that performs linear drive penetrates the valve seat and is linked to the valve core.

[0012] The power source of the drive component is controlled by an electrical signal to drive the amount of power; the pressure plate has a pressure plate hole, which is located in one opening direction of the flow channel and works with the flow channel to perform stepless adjustment of the flow rate.

[0013] Optionally, a compression spring is also included, one end of which is connected to the cover plate and the other end of which abuts against a pressure plate, the pressure plate being located in the direction of the flow channel near the opening of the gas outlet structure.

[0014] Optionally, the pressure plate has a lug on its side and the valve seat has a groove on its inner wall, with the lug engaging with the groove.

[0015] Optionally, the diameter of the flow channel gradually changes along the sliding direction.

[0016] Optionally, the drive assembly includes a drive rod, an anti-rotation component, and a motor as a power source; one end of the drive rod is threaded and is threadedly connected to the output shaft of the motor; the anti-rotation component is used to connect the motor body to the valve seat, to prevent the drive rod from rotating and to allow the drive rod to move axially.

[0017] Optionally, the anti-rotation assembly includes a guide sleeve and a positioning rod. The guide sleeve is fixed outside the valve seat, and the motor is disposed on the guide sleeve with its output shaft passing through the guide sleeve toward the valve seat.

[0018] The positioning rod is fixed to the driving rod and perpendicular to the driving rod; the guide sleeve has a guide groove along its length, and one end of the positioning rod is slidably connected to the guide groove; the end of the driving rod away from the motor passes through the valve seat and is connected to the valve core.

[0019] Optionally, one end of the valve core is provided with a bayonet, and the end of the drive rod away from the motor is provided with a groove in the circumference. The drive rod is inserted into the bayonet, and the inner wall of the outer end of the bayonet is provided with a boss, which is inserted into the groove.

[0020] Optionally, the driving component further includes a driving quantity detection unit, which includes a position sensor and a position detection head;

[0021] An installation plate is provided inside the guide sleeve. The position sensor is fixed to the installation plate. Both ends of the positioning rod extend out of the side wall of the drive rod, with one end inserted into the guide groove and the other end fixed to the position detection head. The position detection head cooperates with the position sensor to detect and provide feedback on the position of the positioning rod relative to the guide sleeve.

[0022] Optionally, the position sensor has multiple position detection contacts, and the movement direction of the position detection head is parallel to the arrangement direction of the multiple position detection contacts; the position detection head has a metal spring sheet, and the metal spring sheet can abut against any of the position detection contacts.

[0023] Secondly, this application provides a gas stove gas supply system, which adopts the following technical solution:

[0024] A gas stove gas supply system, comprising:

[0025] It includes the main intake manifold, solenoid valve, plug valve, potentiometer, gas distribution manifold, automatic valve, and burner;

[0026] One end of the main intake pipe is used to connect to the air source, and the other end is connected to the air intake port of the plug valve. The solenoid valve is installed in the air intake passage of the plug valve. The potentiometer is installed in the plug valve and the rotating shaft of the potentiometer is fixed to the rotating shaft of the plug valve.

[0027] There are multiple air distribution pipes, all of which are connected to the air outlet port of the stopcock valve.

[0028] The automatic valve has the structure of a gas valve as described in any one of the claims, and the automatic valve is installed on at least one gas distribution pipe;

[0029] The outlet end of the gas distribution pipe is connected to the inlet of the burner.

[0030] Optionally, it also includes a temperature sensor and a control module, wherein the temperature sensor is installed on the burner and its output is electrically connected to the control module; the potentiometer, solenoid valve and automatic valve are electrically connected to the control module.

[0031] Thirdly, this application provides a gas supply control method, which adopts the following technical solution:

[0032] A gas supply control method includes: controlling an automatic valve according to a preset automatic flow regulation logic, and / or controlling a plug valve according to a preset manual flow regulation logic.

[0033] Optionally, the automatic flow regulation logic includes:

[0034] The gas stove gas supply system obtains the user's cooking operation instructions, identifies and determines the cooking mode;

[0035] If the cooking mode is oil temperature cooking mode, the feedback signal from the potentiometer is obtained to determine whether the stopcock valve is open to the maximum flow rate. If so, the automatic valve executes the automatic flow rate adjustment process; if not, the stopcock valve is adjusted to the maximum flow rate position, and then the automatic valve executes the automatic flow rate adjustment process. The automatic flow rate adjustment process includes:

[0036] Obtain the temperature value fed back by the temperature sensor;

[0037] Determine if the temperature value is higher than the preset high temperature threshold. If so, output an automatic valve flow reduction command until the temperature value is not higher than the preset high temperature threshold.

[0038] Determine if the temperature value is less than the preset low temperature threshold. If so, output an automatic valve flow increase command until the temperature value is not less than the preset low temperature threshold.

[0039] Optionally, the manual flow adjustment logic includes:

[0040] The automatic valve is opened to the position of maximum flow; and,

[0041] Manually rotate the stopcock to achieve the required gas release rate.

[0042] Fourthly, this application provides a gas stove, which adopts the following technical solution:

[0043] A gas stove, wherein the control module of the gas stove loads and executes a computer program for the gas supply control method described above.

[0044] In summary, this application includes at least one of the following beneficial technical effects: the gas valve structure no longer adopts the traditional method of manually adjusting the gas flow, but instead controls the drive component by giving an electrical signal, so as to change the position of the valve core and adjust the gas flow. Thus, the gas valve structure can be used in conjunction with the control module to control the gas flow, thereby improving the gas control accuracy. Attached Figure Description

[0045] Figure 1 This is a schematic diagram of the valve structure in this application;

[0046] Figure 2 This is a schematic diagram of the valve seat structure after the cover plate is opened and the pressure plate is hidden, according to this application;

[0047] Figure 3 This is a schematic diagram of the valve seat structure after the cover plate is opened according to this application;

[0048] Figure 4 yes Figure 3 A schematic diagram of the structure after being cut along section AA;

[0049] Figure 5 This is a cross-sectional structural diagram of this application;

[0050] Figure 6 This is a schematic diagram of the cooperative structure of the position sensor and the position detection head in this application;

[0051] Figure 7 This is a schematic diagram of the gas supply system of this application.

[0052] Explanation of reference numerals in the attached drawings: 1. Valve seat; 11. Sealing plane; 12. Gas passage; 2. Valve core; 21. Flow channel; 22. Bayonet; 221. Boss; 3. Cover plate; 31. Sealing gasket; 4. Compression spring; 41. Pressure plate; 410. Pressure plate hole; 411. Groove; 412. Lug; 51. Drive rod; 511. Groove; 52. Positioning rod; 53. Motor; 54. Guide sleeve; 541. Guide groove; 542. Mounting plate; 55. Position sensor; 551. Position detection contact; 56. Position detection head; 561. Metal spring plate; 61. Main air intake pipe; 62. Solenoid valve; 63. Plug valve; 64. Potentiometer; 65. Gas distribution pipe; 66. Burner; 7. Temperature sensor; 8. Control module; 9. Stove shell. Implementation

[0053] The following is in conjunction with the appendix Figure 1-7 This application will be described in further detail.

[0054] This application discloses a gas valve structure.

[0055] Reference Figure 1 The gas valve structure includes a valve seat 1, a valve core 2, a cover plate 3, and a drive assembly. The main body of the valve seat 1 is an elongated structure with a molded end connected to a connector plate. The valve seat 1 is hollow and has an open inner cavity. A connecting lug for inserting bolts is formed along the opening of the inner cavity of the valve seat 1.

[0056] Reference Figure 1 and Figure 2 The cover plate 3 is placed on the valve seat 1, covering the inner opening of the valve seat 1, and is fixed to the valve seat 1 by bolts. To enhance the sealing performance of the cover plate 3, the inner opening of the valve seat 1 is recessed, and the recessed part is engaged with the sealing gasket 31. The sealing gasket 31 is pressed tightly against the valve seat 1 by the cover plate 3 to enhance the seal. Of course, the cover plate 3 and the valve seat 1 can also be connected by a snap-fit ​​or other detachable connection method.

[0057] Reference Figure 3 and Figure 4 The valve seat 1 has a sealing plane 11 machined on the bottom surface of its inner cavity. The sealing plane 11 can be a platform higher than the bottom of the inner cavity and have an opening, or the sealing plane 11 can be part of the bottom of the inner cavity and have an opening. The valve seat 1 also has a gas passage 12, which can be one or more. Taking the figure as an example, there can be two gas passages that are interconnected. One passage runs through the inner cavity of the valve seat 1 and the outside, and the side of the valve seat 1 is formed with an internal threaded pipe port that matches the gas inlet of the gas passage 12. The other gas passage 12 connects to the opening of the sealing plane 11, and one end runs through the valve seat 1 and the other end is connected to an internal threaded pipe port that matches the gas outlet. The internal threaded pipe port is connected to the gas inlet and gas outlet structures by means of threaded connection, such as threaded fixing of the gas inlet connector and the gas outlet connector, for connecting the pipes of the gas supply structure and the gas outlet structure.

[0058] The valve core 2 has a flow channel 21 with a gradually changing cross-sectional area along the sliding direction, and the flow channel 21 can be teardrop-shaped. The valve core 2 rests on the sealing plane 11 of the valve seat 1, and changes the effective ventilation area when it slides along the length of the valve seat 1 in conjunction with the gas passage 12, thereby realizing the control of gas flow rate.

[0059] Reference Figure 1 The main body of the drive assembly is connected to one side of the connector plate of the valve seat 1, and at least one of its linear drive parts penetrates the valve seat 1 and is linked with the valve core 2. The power source of the drive assembly is controlled by an electrical signal to determine the drive amount.

[0060] As can be seen from the above, this gas valve structure can control the drive component by giving an electrical signal, thereby changing the position of the valve core and adjusting the gas flow. Thus, this gas valve structure can be used in conjunction with a controller to control the gas flow, thereby improving the gas control accuracy.

[0061] Reference Figure 1 The structure also includes a compression spring 4. The function of the compression spring 4 is to prevent the valve core 2 from being pushed up by the gas pressure and affecting the performance. After all, as can be seen from the above structure, the cover plate 3 does not protrude into the valve seat 1 to compress the valve core 2.

[0062] Reference Figure 5 One end of the compression spring 4 is sleeved on the column head formed on the lower part of the cover plate 3, and the other end extends toward the bottom of the inner cavity of the valve seat 1.

[0063] Since the valve core 2 slides during use, there is a chance that the pressure spring 4 may scratch the valve core 2 if it directly contacts it. Therefore, a pressure plate 41 is also provided; the pressure plate 41 rests on the valve core 2, and the pressure spring 4 presses on the pressure plate 41.

[0064] To facilitate gas flow in conjunction with valve core 2, pressure plate hole 410 is provided on pressure plate 41 along the thickness direction. Pressure plate hole 410 is located above flow channel 21 and the two are connected.

[0065] Furthermore, refer to Figure 1 In order to prevent the pressure plate 41 from sliding along with the valve core 2 and affecting the performance, lugs 412 are formed on both sides of the pressure plate 41; a vertical groove 411 is provided on the inner wall of the valve seat 1, and the lugs 412 are inserted into the groove 411 from top to bottom to restrict the sliding.

[0066] Reference Figure 1 and Figure 5 In one embodiment of this structure, the drive assembly includes a drive rod 51, an anti-rotation assembly, a drive quantity detection unit, and a motor 53, wherein the anti-rotation assembly includes a positioning rod 52 and a guide sleeve 54.

[0067] The guide sleeve 54 is coaxial with the valve seat 1 and is fixed to the connector plate of the valve seat 1 by long bolts.

[0068] The motor 53 can be a stepper motor, with an ear plate extending from its housing. The ear plate is passed through by the aforementioned long bolt to fix the motor 53 to the end of the guide sleeve 54 away from the valve seat 1. The output shaft of the motor 53 extends into the guide sleeve 54 and faces the valve seat 1. The connector plate of the valve seat 1 has an opening in the middle that connects to the inner cavity of the valve seat 1.

[0069] One end of the drive rod 51 is formed with an external thread structure; the output shaft of the motor 53 has a threaded hole, and the drive rod 51 is threadedly connected to the motor 53. The end of the drive rod 51 away from the motor 53 passes through the central opening of the connector plate of the valve seat 1 and extends into the valve seat 1 to connect with the valve core 2.

[0070] Reference Figure 5 A slot 22 is provided at one end of the valve core 2 near the valve seat 1, and a groove 511 is provided around the outer wall of the drive rod 51 at the end away from the motor 53. The end of the drive rod 51 away from the motor 53 is inserted into the slot 22. A boss 221 is formed at the outer end of the slot 22, and the boss 221 is inserted into the groove 511 to connect the valve core 2 and the drive rod 51. This connection method facilitates the disassembly and installation of the valve core 2 by the operator.

[0071] The aforementioned positioning rod 52 is vertically fixed to the drive rod 51 and passes through the drive rod 51; a guide groove 541 is provided in the guide sleeve 54 along the length direction, and one end of the positioning rod 52 extends into the guide groove 541.

[0072] When the motor 53 rotates, it tends to drive the drive rod 51 to rotate. Since the positioning rod 52 cooperates with the guide groove to restrict the rotation of the drive rod 51, the drive rod 51 moves along its central axis (equivalent to a nut screw). The movement of the drive rod 51 causes the valve core 2 to slide, thereby realizing the control of the gas flow rate. Moreover, because a stepper motor is used, the control accuracy is relatively high.

[0073] Reference Figure 1 and Figure 5 In one embodiment of this application, in order to achieve closed-loop control, the drive quantity detection unit includes a position sensor 55 and a position detection head 56.

[0074] An mounting plate 542 is formed along the length direction inside the guide sleeve 54, and the position sensor 55 is fixed on the mounting plate 542; the position detection head 56 is fixed to the other end of the positioning rod 52, corresponding to the position sensor 55.

[0075] Reference Figure 6 Regarding the position sensor 55 and the position detection head 56, specifically: the position sensor 55 has multiple position detection contacts 551.

[0076] The position detection head 56 moves in a direction parallel to the arrangement direction of the multiple position detection contacts 551; the position detection head 56 has a metal spring sheet 561, the lower end of the metal spring sheet 561 is bent upward and the outer bend can abut against any position detection contact 551.

[0077] In use, the position sensor 55 obtains the position information of the position detection head 56 based on which detection contact point the metal spring sheet 561 is in contact with, and thus obtains the movement amount of the drive rod 51 based on the change in position of the position detection head. The usage process of this structure is described in another embodiment of this application, and therefore will not be repeated here.

[0078] This application also discloses a gas stove gas supply system.

[0079] Reference Figure 7 The gas stove gas supply system includes: main gas inlet pipe 61, solenoid valve 62, stopcock valve 63, potentiometer 64, automatic valve, gas distribution pipe 65, and burner 66.

[0080] Understandably, the above structure is installed in the gas stove casing 9. One end of the main air intake pipe 61 is used to connect to the gas source, and the other end is used to connect to the air intake port of the stopcock valve 63. The solenoid valve 62 is integrated into the air intake path of the stopcock valve 63. The potentiometer 64 is installed on the stopcock valve 63, and its rotating shaft is fixed to the rotating shaft of the stopcock valve 63, so that the rotation of the stopcock valve 63 can be output as an electrical signal.

[0081] There are multiple gas distribution pipes 65, which can be determined according to the number of flame rings required by the burner 66 of the gas stove; taking two as an example, one is an outer ring gas distribution pipe, connected to the air intake of the outer flame ring of the burner 66; the other is an inner ring gas distribution pipe, connected to the air intake of the inner flame ring of the burner 66. The end of the gas distribution pipe 65 away from the burner 66 is connected to the gas outlet port of the stopcock valve 63.

[0082] The automatic valve adopts the gas valve structure described in any of the above embodiments, and is installed on at least one gas distribution pipe 65; in this embodiment, it is preferentially installed on the outer ring gas distribution pipe, because the outer ring gas distribution corresponding to the outer circle of the burner flame 66 bears most of the burner's flow, and the gas flow adjustment range is larger.

[0083] In one embodiment of this system, the system further includes a temperature sensor 7 and a control module 8.

[0084] Among them, the temperature sensor 7 is installed in the center of the burner to sense the combustion temperature and output the corresponding temperature detection signal; the control module 8 is such as the control circuit board of the integrated stove, whose electrical signal is connected to the signal output terminal of the temperature sensor 7 to obtain the temperature value based on the temperature detection signal.

[0085] Correspondingly, the potentiometer 64, solenoid valve 62, motor 53, and position sensor 55 in the automatic valve are respectively connected to the control module 8 to realize the rotation feedback of the plug valve 63, the control of the solenoid valve 62, the drive feedback of the motor 53 of the automatic valve, and the automatic control of the motor 53.

[0086] The manual and automated control of the above system is described in another embodiment of this application, and therefore will not be repeated here.

[0087] This application also discloses a gas supply control method.

[0088] The gas supply control method, which is based on the gas stove gas supply system mentioned above, includes: controlling an automatic valve according to a preset automatic flow regulation logic, and / or controlling a stopcock valve according to a preset manual flow regulation logic.

[0089] The automatic flow regulation logic is implemented by the gas stove supply system (such as the control module 8 mentioned above), including:

[0090] Acquire user cooking operation commands (such as those entered on the control panel of the integrated stove), identify them, and determine the cooking mode;

[0091] If the cooking mode is oil temperature cooking mode, the feedback signal from potentiometer 64 is obtained to determine whether the stop valve 63 is open to the maximum flow. If so, the automatic flow adjustment process is executed; if not, the user must first manually operate and adjust the stop valve 63 to the maximum flow position, and then the automatic valve will execute the automatic flow adjustment process.

[0092] The automatic flow regulation process includes:

[0093] Obtain the temperature value fed back by temperature sensor 7;

[0094] If the temperature value is higher than the preset high temperature threshold, the automatic valve flow rate is reduced until the temperature value is not higher than the preset high temperature threshold. That is, the preset step control signal of the motor 53 is output to drive the drive rod 51 to pull the valve core 2 to reduce the flow rate. The unit control amount is preset to reduce the gas supply and lower the temperature of the pot.

[0095] Determine if the temperature value is less than the preset low temperature threshold. If so, output an automatic valve flow increase command until the temperature value is not less than the preset low temperature threshold; that is, the above-mentioned reverse control process.

[0096] The logic for manual flow adjustment includes:

[0097] First, open the automatic valve to the maximum flow position, then manually adjust the stopcock valve 63 to the desired flow position.

[0098] Based on the above, compared with the existing gas supply control method of gas stoves, this gas stove can operate manually like a traditional stove and also has the functions of a smart stove. It can avoid the problem that the gas stove cannot be used due to the lack of driving power in the event of a power outage. That is, when the gas stove components fail, the gas stove can be operated manually, which is safer. When there is power, the automatic valve uses an electrical signal to control the motor 53 to drive the valve core 2 to move linearly, and uses the position sensor 55 to position the closed loop feedback to realize automatic control of gas flow, so the flow control accuracy is higher.

[0099] This application also discloses a gas stove.

[0100] The gas stove's control module loads and executes a computer program for the gas supply control method described above.

[0101] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A gas range gas supply system, characterized by: The main air inlet pipe (61), the electromagnetic valve (62), the plug valve (63), the potentiometer (64), the air distribution pipe (65), the automatic valve and the burner (66) are included. One end of the main air inlet pipe (61) is connected to the air source, and the other end is connected to the air inlet port of the plug valve (63). The electromagnetic valve (62) is installed in the air inlet channel of the plug valve (63). The potentiometer (64) is installed in the plug valve (63), and the rotating shaft of the potentiometer (64) is fixed with the rotating shaft of the plug valve (63). The air distribution pipe (65) is connected to the air outlet port of the plug valve (63). The automatic valve is installed on at least one air distribution pipe (65). The air outlet end of the air distribution pipe (65) is connected to the air inlet of the burner (66). The automatic valve includes: The valve seat (1) is provided with an open inner cavity and at least one gas passage (12) for connecting the gas inlet structure and the gas outlet structure. The valve core (2) slides in the inner cavity of the valve seat (1) and is provided with a flow channel (21). One end of the flow channel (21) is connected to the gas inlet structure of the valve seat (1), and the other end is connected to the gas outlet structure of the valve seat (1). The pressing plate (41) is arranged in the inner cavity of the valve seat (1) and is parallel to and attached to the valve core (2). The cover plate (3) is detachably connected to the valve seat (1) and covers the inner cavity of the valve seat (1). The driving assembly is installed in the valve seat (1) and has at least one driving part penetrating into the valve seat (1) and connected to the valve core (2). The driving amount of the driving assembly is controlled by the power source controlled by the electric signal. The pressing plate hole (410) is arranged on the pressing plate (41) and located in the opening direction of the flow channel (21). The flow channel (21) is matched with the flow channel (21) to adjust the flow rate steplessly. The temperature sensor (7) and the control module (8) are also included. The temperature sensor (7) is installed in the burner (66) and the output end is electrically connected to the control module (8). The potentiometer (64), the electromagnetic valve (62) and the automatic valve are electrically connected to the control module (8). The gas supply control method includes: controlling the automatic valve according to the preset automatic flow adjustment logic, and / or controlling the plug valve according to the preset manual flow adjustment logic. The manual flow adjustment logic includes: The automatic valve is opened to the maximum flow position; and The plug valve is manually rotated to make the gas release rate reach the required flow rate. The automatic flow adjustment logic includes: The gas stove gas supply system obtains user cooking operation instructions, identifies and determines the cooking mode. If the cooking mode is the oil temperature cooking mode, the feedback signal of the potentiometer (64) is obtained, and it is judged whether the plug valve (63) is opened to the maximum flow rate. If yes, the automatic valve executes the automatic flow adjustment process; if no, the plug valve is adjusted to the maximum flow position, and then the automatic valve executes the automatic flow adjustment process. The automatic flow adjustment process includes: The temperature value fed back by the temperature sensor (7) is obtained. determining whether the temperature value is higher than a preset high temperature threshold, and outputting an automatic valve flow reduction instruction if yes, until the temperature value is not higher than the preset high temperature threshold; determining whether the temperature value is lower than a preset low temperature threshold, and outputting an automatic valve flow increase instruction if yes, until the temperature value is not lower than the preset low temperature threshold.

2. The gas stove gas supply system according to claim 1, characterized in that: The pressing spring (4) is connected to the cover plate (3) at one end and abuts against the pressing plate (41) at the other end, and the pressing plate (41) is located in the opening direction of the flow passage (21) close to the gas outlet structure.

3. The gas hob gas supply system of claim 2, characterized in that: The side of the pressing plate (41) is provided with a lug (412), and the inner wall of the valve seat (1) is provided with a groove (411), and the lug (412) is connected to the groove (411).

4. The gas stove gas supply system according to claim 1 or 2 or 3, characterized in that: The diameter of the flow passage (21) gradually changes along the sliding direction.

5. The gas stove gas supply system according to claim 1, characterized in that: The driving assembly includes a driving rod (51), a rotation stopping assembly, and a motor (53) as a power source; one end of the driving rod (51) is provided with a thread and is threadedly connected to the output shaft of the motor (53); the rotation stopping assembly is used to connect the body of the motor (53) to the valve seat (1) and is used to prevent the driving rod (51) from rotating and allow the driving rod (51) to move axially.

6. The gas hob gas supply system of claim 5, characterized in that: The rotation stopping assembly includes a guide sleeve (54) and a positioning rod (52), the guide sleeve (54) is fixed outside the valve seat (1), and the motor (53) is arranged in the guide sleeve (54) and the output shaft penetrates the guide sleeve (54) and faces the valve seat (1); The positioning rod (52) is fixed to the driving rod (51) and is perpendicular to the driving rod (51); a guide groove (541) is arranged in the guide sleeve (54) along the length direction; one end of the positioning rod (52) is slidably connected to the guide groove (541); and the end of the driving rod (51) away from the motor (53) penetrates the valve seat (1) and is connected to the valve core (2).

7. The gas hob gas supply system of claim 6, characterized in that: One end of the valve core (2) is provided with a bayonet (22), and the end of the driving rod (51) away from the motor (53) is provided with a groove (511) in the circumferential direction; the driving rod (51) is clamped into the bayonet (22), the outer end inner wall of the bayonet (22) is provided with a boss (221), and the boss (221) is inserted into the groove (511).

8. The gas stove gas supply system according to claim 6, characterized in that: The driving assembly further includes a driving amount detection unit, and the driving amount detection unit includes a position sensor (55) and a position detection head (56); The guide sleeve (54) is provided with a mounting plate (542), the position sensor (55) is fixed to the mounting plate (542), both ends of the positioning rod (52) extend out of the side wall of the driving rod (51), one end is inserted into the guide groove (541), and the other end is fixed with the position detection head (56); the position detection head (56) and the position sensor (55) cooperate to detect and feedback the position of the positioning rod (52) relative to the guide sleeve (54).

9. The gas hob gas supply system of claim 8, characterized in that: The position sensor (55) has a plurality of position detection contacts (551), and the moving direction of the position detection head (56) is parallel to the arrangement direction of the plurality of position detection contacts (551); the position detection head (56) has a metal spring sheet (561), and the metal spring sheet (561) can abut against any position detection contact (551).

10. A gas hob, characterized in that: The control module (8) of the gas stove loads and executes the computer program of the gas supply system of the gas stove according to any one of claims 1-9.

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