A household gas stove knob safety control device and use method

Abstract

The present invention relates to a household gas stove knob safety control device, comprising a controller, a rotating mechanism, a clamping mechanism, an infrared temperature camera and a battery; the rotating mechanism comprises an electric drive element and a hollow rotating body; the clamping mechanism is fixedly connected to the hollow rotating body of the rotating mechanism, the clamping mechanism is used to clamp the knob of the gas stove, when the clamping mechanism clamps the knob, the rotation axis of the hollow rotating body coincides with the rotation axis of the knob; the rotating mechanism, the clamping mechanism and the infrared temperature camera are all connected to the controller, the infrared temperature camera is used to monitor the temperature and image of the utensils on the stove; the controller contains a control program, image analysis software and a self-learning adaptive program; the battery is used to power the controller, the rotating mechanism, the clamping mechanism and the infrared temperature camera. The technical solution can be used to reduce the fire or turn off the gas stove according to the actual situation, effectively making up for the defects of manual monitoring and inadequate operation.

Description

Technical Field

[0001] The invention belongs to the technical field of use and control of household gas stoves, and in particular relates to a household gas stove knob safety control device and a use method thereof. Background Art

[0002] The use of household gas stoves is generally achieved by controlling the knob. The operation of the knob is generally: turn it counterclockwise to light the stove head. When the knob pointer turns to 90°, the stove head has the highest fire power, and when the knob pointer turns to 180°, the stove head has the lowest fire power.

[0003] When using a gas stove, you often encounter the following problems, such as:

[0004] (1) When cooking noodles or dumplings on a gas stove, once the pot starts to boil, you need to turn the knob to low heat within a short period of time to prevent the boiling liquid from overflowing. If you forget or fail to adjust the knob in time, the overflowing liquid may cause the stove flame to be extinguished, increasing the workload of cleaning the stove.

[0005] (2) When boiling water on a gas stove with a kettle, you need to turn the knob to turn off the gas stove after the water boils. However, if the kettle does not have a whistle device or the whistle fails, the gas stove may not be turned off in time, which may lead to the following two consequences:

[0006] First, overflowing boiling water may extinguish the flame on the stove. If the gas stove does not have the function of automatically cutting off the gas supply when the flame is extinguished, there may be safety hazards due to gas leakage.

[0007] Second, the water in the kettle continues to boil or boils dry. Boiled water is not suitable for drinking and wastes energy. Boiled water may damage the kettle or even cause a fire.

[0008] As mentioned above, the adverse problems caused by failure to turn down the fire or turn off the gas stove in time are common in life, especially for the elderly with poor memory or young people with scattered attention. The probability of the above problems occurring when operating the gas stove is greatly increased.

[0009] There is no suitable solution in the existing technology as to how to solve the above problems through technical means instead of relying solely on human vigilance. Summary of the invention

[0010] The technical problem to be solved by the present invention is to make up for the deficiencies of the prior art and provide a household gas stove knob safety control device and a use method thereof.

[0011] To solve the above technical problems, the technical solution of the present invention is:

[0012] A household gas stove knob safety control device comprises a controller, a rotating mechanism, a clamping mechanism, an infrared temperature camera and a battery.

[0013] The rotating mechanism is used to be fixedly arranged on the table of the gas stove, and includes an electric driving element and a hollow rotating body. The electric driving element is used to drive the hollow rotating body to rotate. The rotation axis of the hollow rotating body is the axis K. The action of the electric driving element is controlled by the controller.

[0014] The clamping mechanism is fixedly connected to the hollow rotating body of the rotating mechanism and is arranged in the inner cavity surrounded by the hollow rotating body. The clamping mechanism is used to clamp the knob of the gas stove. The rotation axis of the knob is axis X. When the clamping mechanism clamps the knob, axis X and axis K coincide with each other. The action of the clamping mechanism is controlled by the controller.

[0015] The infrared temperature camera is connected to the controller and is used to face the stove head of the gas stove to monitor the temperature and image of the utensils on the stove head;

[0016] The controller contains control program, image analysis software and self-learning adaptive program;

[0017] The battery is used to power the controller, rotating mechanism, clamping mechanism and infrared temperature camera.

[0018] Furthermore, the rotating mechanism is specifically a hollow shaft torque servo motor, and the hollow shaft torque servo motor includes a hollow shaft.

[0019] Furthermore, the hollow shaft torque servo motor is fixedly connected to the tabletop of the gas stove by any one of gluing, magnetic attraction, and vacuum suction cup.

[0020] Furthermore, the clamping mechanism includes a bracket, which is fixedly connected to the hollow rotating body of the rotating mechanism, and a slide groove is fixedly provided on the bracket, and a double-output shaft servo motor is fixedly provided in the middle of the slide groove, and the double-output shaft servo motor includes a screw shaft, and the length direction of the screw shaft is parallel to the length direction of the slide groove. The screw shaft includes a first rotation direction screw shaft and a second rotation direction screw shaft coaxially arranged, and the external thread R of the first rotation direction screw shaft and the external thread L of the second rotation direction screw shaft are opposite in rotation direction; the first rotation direction screw shaft is screwed to the right nut slider through the external thread R, and the second rotation direction screw shaft is screwed to the left nut slider through the external thread L, the right nut slider and the slide groove constitute a pair of moving pairs, and the left nut slider and the slide groove also constitute a pair of moving pairs; the right nut slider and the left nut slider are both fixedly provided with claw plates, and the claw plates are used to clamp the knob of the gas stove.

[0021] Furthermore, elastic silicone is provided on the side of the claw plate facing the knob.

[0022] Furthermore, a flexible pressure sensor is provided in the elastic silicone, and the flexible pressure sensor is connected to the controller.

[0023] Furthermore, the controller is a display PLC controller, which includes a display screen and a button area, on which are provided a device power button, a low-fire time setting button, a high-fire time setting button, and a knob fire-off button.

[0024] Furthermore, a voice setting key is also provided on the key area.

[0025] Furthermore, a high fire indicator light and a low fire indicator light are also provided on the key area.

[0026] A method for using the household gas stove knob safety control device as described above comprises the following steps:

[0027] S1: Fix the rotating mechanism of the household gas stove knob safety control device on the table of the gas stove by gluing or magnetic attraction, and make the hollow rotating body concentric with the knob corresponding to the stove head on the gas stove;

[0028] S2: Fix the infrared temperature camera on the range hood above the gas stove, and the shooting range of the infrared temperature camera is adapted to the stove head;

[0029] S3: Before use, the gas stove has been ignited manually and the knob is pointing to high fire;

[0030] S4: The household gas stove knob safety control device is activated by the device power button, and the infrared temperature camera starts to monitor the temperature and image of the utensils on the stove head of the gas stove;

[0031] S5: The controller receives and determines the information transmitted by the infrared temperature camera, and determines the type of the vessel on the stove;

[0032] S6: If it is determined that the vessel is a kettle, execute steps S61-S64;

[0033] S61: The controller receives and determines the information transmitted by the infrared temperature camera. When it is determined that the temperature of the kettle cover reaches 100° C. and the captured image meets the programmed characteristic image A, the controller controls the clamping mechanism to clamp the knob.

[0034] S62: When the pressure value transmitted to the controller by the flexible pressure sensor reaches the programmed set value, the controller controls the rotation mechanism to move the knob to the off state;

[0035] S63: When the knob is turned to the off state, the knob is stopped by the gas stove and the rotating mechanism stops rotating;

[0036] S64: The controller controls the clamping mechanism to release the knob, and then controls the rotating mechanism to rotate in the opposite direction to the initial position;

[0037] S7: If it is determined that the vessel is a rice cooker, execute steps S71-S75;

[0038] S71: The controller receives and determines the information transmitted by the infrared temperature camera. When it is determined that the temperature of the upper part of the rice cooker is close to 100° C. and the captured image meets the programmed characteristic image B, the controller controls the clamping mechanism to clamp the knob;

[0039] S72: When the pressure value transmitted to the controller by the flexible pressure sensor reaches the programmed set value, the controller controls the rotation mechanism to move the knob to a low-fire state;

[0040] S73: In the low-fire state, when it is determined that the temperature of the upper part of the rice cooker is close to 100° C. and the captured image meets the programmed characteristic image C, the controller controls the rotation mechanism to rotate the knob to the off-fire state;

[0041] S74: When the knob is rotated to the off state, the knob is stopped by the gas stove and the rotating mechanism stops rotating;

[0042] S75: The controller controls the clamping mechanism to release the knob, and then controls the rotating mechanism to rotate in the opposite direction to the initial position.

[0043] The beneficial effects that can be achieved by the present invention are: the temperature and image of the utensils on the gas stove burner are monitored by an infrared temperature camera, the controller determines the temperature and real-time status of the utensils on the burner through the characteristic image, and controls the action of the clamping mechanism and the rotating mechanism according to the judgment result, so as to turn down the fire or turn off the gas stove according to the actual situation, effectively making up for the defects of manual monitoring and inadequate operation, saving energy and eliminating safety hazards. BRIEF DESCRIPTION OF THE DRAWINGS

[0044] Figure 1 is a schematic diagram of the use status of an embodiment of the present invention;

[0045] Figure 2 yes Figure 1 A partial enlarged view of part I in the middle;

[0046] Figure 3 yes Figure 2 A top view of

[0047] Figure 4 yes Figure 2 Side view of

[0048] Figure 5 yes Figure 3 AA section view;

[0049] Figure 6 is a diagram of the initial state of the clamping knob according to an embodiment of the present invention;

[0050] Figure 7is a cross-sectional view of a clamping knob in a low-fire state according to an embodiment of the present invention;

[0051] Figure 8 This is a diagram of the flame-off state of the clamping knob according to an embodiment of the present invention;

[0052] Fig. 9 is an electric control principle diagram of an embodiment of the present invention;

[0053] In the figure: 1-gas stove, 2-knob, 3-table, 4-left stove, 5-kettle, 6-spout, 7-pot lid, 8-range hood, 9-left infrared temperature camera, 10-right infrared temperature camera, 11-rice cooker, 12-right stove, 13-controller, 14-mounting hole, 15-hollow shaft torque servo motor, 16-hollow shaft, 17-claw plate, 18-elastic silicone, 19-pointer, 20-display, 21-key area, 2 2-knob fire off button, 23-high fire indicator light, 24-high fire time setting button, 25-low fire indicator light, 26-low fire time setting button, 27-voice setting button, 28-device power on / off button, 29-flexible pressure sensor, 30-knob shaft, 31-right nut slider, 32-screw shaft, 33-double-output shaft servo motor, 34-slide, 35-bracket, 36-first rotation direction screw shaft, 37-left nut slider, 38-second rotation direction screw shaft. DETAILED DESCRIPTION

[0054] The present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0055] The gas stove 1 described below is a double burner. Figure 1 As shown, it includes a left burner 4 and a right burner 12, each burner is matched with a knob 2, and a pointer 19 is provided on the knob 2. The knob 2 is used to start the ignition, turn off the fire, and manually adjust the size of the fire according to the direction of the pointer 19. The following description is made for the fire-off state, the low-fire state, and the high-fire state:

[0056] Fire-off state: When the pointer 19 on the knob 2 points to 0°, the stove is turned off.

[0057] High fire state: When the pointer 19 on the knob 2 is at [45, 135]°, the stove fire is relatively strong, which is called the high fire state. When the pointer 19 on the knob 2 points to 90°, the stove fire is at its strongest.

[0058] Low fire state: when the pointer 19 on the knob 2 is at (135, 180]°, the stove fire is relatively small, which is called the low fire state. When the pointer 19 on the knob 2 points to 180°, the stove fire is the smallest.

[0059] For the gas stove 1 with two burners, two sets of household gas stove knob safety control devices need to be equipped accordingly, that is, each burner is equipped with a set of household gas stove knob safety control devices, which are used separately without interfering with each other.

[0060] For the convenience of description, a kettle 5 is placed on the left stove 4, and a rice cooker 11 is placed on the right stove 12.

[0061] A household gas stove knob safety control device comprises a controller 13, a rotating mechanism, a clamping mechanism, an infrared temperature camera and a battery.

[0062] The rotating mechanism in this embodiment is specifically a hollow shaft torque servo motor 15, which includes a hollow shaft 16, the rotation axis of the hollow shaft 16 is the axis K, and the action of the hollow shaft torque servo motor 15 is controlled by the controller 13; the length of the hollow shaft 16 is shorter than the height of the knob 2 and the height of the main body of the hollow shaft torque servo motor 15; under the guidance of this embodiment, those skilled in the art can also design rotating mechanisms of other structures by driving the hollow rotating body through a motor and a transmission mechanism (gear transmission or belt transmission).

[0063] The hollow shaft torque servo motor 15 is fixedly connected to the table top 3 of the gas stove 1 by gluing, that is, the bottom of the hollow shaft torque servo motor 15 is bonded to the table top 3 of the gas stove 1 as a whole by glue. Under the guidance of this embodiment, those skilled in the art can also achieve the fixed connection between the hollow shaft torque servo motor 15 and the table top 3 by adopting magnets, or vacuum suction cups, or setting mounting holes 14 at the bottom of the hollow shaft torque servo motor 15 and matching screws, etc., depending on the material of the table top 3.

[0064] The clamping mechanism in this embodiment includes a bracket 35, which is fixedly connected to the hollow shaft 16 of the hollow shaft torque servo motor 15. A slide groove 34 is fixedly provided on the bracket 35, and a double-output shaft servo motor 33 is fixedly provided in the middle of the slide groove 34. The double-output shaft servo motor 33 includes a screw shaft 32, and the two ends of the screw shaft 32 are respectively inserted into the shaft holes at the two ends of the slide groove 34. The length direction of the screw shaft 32 is parallel to the length direction of the slide groove 34. The screw shaft 32 includes a first rotation direction screw shaft 36 and a second rotation direction screw shaft 38 coaxially arranged. The external thread R of the first rotation direction screw shaft 36 and the external thread L of the second rotation direction screw shaft 38 are opposite in rotation; the first rotation direction screw shaft 36 is connected to the second rotation direction screw shaft 38 through the external thread R is screwed to the right nut slider 31, and the second rotation direction screw shaft 38 is screwed to the left nut slider 37 through the external thread L. The right nut slider 31 and the slide groove 34 form a pair of moving pairs, and the left nut slider 37 and the slide groove 34 also form a pair of moving pairs; claw plates 17 are welded on the right nut slider 31 and the left nut slider 37; the action of the double-output shaft servo motor 33 is controlled by the controller 13; when the double-output shaft servo motor 33 is in action, the right nut slider 31 and the left nut slider 37 move toward or away from each other, so that the claw plate 17 clamps or releases the knob 2 of the gas stove 1, and the axis of the knob shaft 30 of the knob 2 is the axis X; when the clamping mechanism clamps the knob 2, the axis X and the axis K coincide with each other.

[0065] The two gripping plates 17 can be adapted to accommodate knobs 2 of various shapes and sizes, and when the two gripping plates 17 are not in contact with the knob 2, normal manual manipulation of the knob is not hindered.

[0066] In order to increase the clamping friction between the gripping plate 17 and the knob 2, an elastic silicone 18 is provided on the side of the claw plate 17 facing the knob 2; a flexible pressure sensor 29 is provided in the elastic silicone 18, and the flexible pressure sensor 29 is connected to the controller 13 for monitoring the real-time clamping force.

[0067] The infrared temperature camera is connected to the controller 13, and the communication method between the controller 13 and the infrared temperature camera is wireless communication; the infrared temperature camera is used to face the stove head of the gas stove 1 to monitor the temperature and image of the utensils on the stove head (such as: the spout 6 continuously emits steam, there is continuous steam emission, the liquid level is about to overflow the upper edge of the rice cooker 11, the liquid level overflows the upper edge of the rice cooker 11, etc.).

[0068] The controller 13 is installed on the top side of the hollow shaft torque servo motor 15. The controller 13 is a display PLC controller, which includes a control program, image analysis software and a self-learning adaptive program; the display PLC controller also includes a display screen 20 and a button area 21. The button area 21 is provided with a device power button 28, a low fire time setting button 26, a high fire time setting button 24, a knob fire off button 22, a voice setting button 27, a high fire indicator light 23 and a low fire indicator light 25.

[0069] The battery is used to power the controller 13, the rotating mechanism, the clamping mechanism and the infrared temperature camera. The battery selected in this embodiment is a high temperature resistant lithium battery.

[0070] Since the household gas stove knob safety control device in this embodiment does not have a stove ignition function, the torque required for rotating the knob 2 is relatively small, so the overall structure of the device is not large.

[0071] The method for using the above household gas stove knob safety control device comprises the following steps:

[0072] S1: Fix the hollow shaft torque servo motor 15 of the household gas stove knob safety control device on the table 3 of the gas stove 1 by gluing, and make the hollow shaft 16 concentric with the knob 2 corresponding to the stove head on the gas stove 1;

[0073] S2: Fix the infrared temperature camera on the range hood 8 above the gas stove 1, and the shooting range of the infrared temperature camera is adapted to the stove head, that is: the left stove head 4 is adapted to the left infrared temperature camera 9, and the right stove head 12 is adapted to the right infrared temperature camera 10.

[0074] When water needs to be boiled, a kettle 5 filled with water is placed on the left stove 4, and then step S3 is executed.

[0075] S3: Manually operate the knob 2 of the left burner 4 to ignite the fire successfully, and make the knob 2 point to the high fire state;

[0076] S4: The household gas stove knob safety control device is started by operating the device power button 28, and the left infrared temperature camera 9 starts to monitor the temperature and image of the utensils on the stove head of the gas stove 1, such as the shape of the utensils, the height of the boiling liquid level, etc.;

[0077] S5: The controller 13 receives and determines the information transmitted by the left infrared temperature camera 9, and determines the type of the vessel on the stove;

[0078] S6: Determine that the vessel is a kettle 5, and execute steps S61-S64;

[0079] S61: the controller 13 receives and determines the information transmitted by the left infrared temperature camera 9. When it is determined that the temperature of the lid 7 of the kettle 5 reaches 100°C and the captured image (e.g., steam continuously emanates from the spout 6) meets the programmed characteristic image A, the controller 13 controls the clamping mechanism to clamp the knob 2.

[0080] S62: When the pressure value transmitted to the controller 13 by the flexible pressure sensor 29 reaches the programmed set value, the controller 13 controls the hollow shaft torque servo motor 15 to operate, so that the knob 2 is rotated to the off state;

[0081] S63: When the knob 2 is rotated to the off state, the knob 2 is stopped by the gas stove 1, the hollow shaft torque servo motor 15 senses the maximum torque value, and the controller 13 controls the hollow shaft torque servo motor 15 to stop rotating;

[0082] S64: The controller 13 controls the clamping mechanism to release the knob 2, and then controls the hollow shaft torque servo motor 15 to rotate in the opposite direction to the initial position; of course, those skilled in the art can also add a voice prompt function on this basis, emit a prompt sound of "the kettle water is boiling, the knob is closed", and display the voice content on the display screen 20.

[0083] When noodles need to be cooked, a rice cooker 11 filled with water and noodles is placed on the right stove head 12, and then step S3 is performed.

[0084] S3: Manually operate the knob 2 of the right stove head 12 to ignite the fire successfully, and make the knob 2 point to the high fire state;

[0085] S4: The household gas stove knob safety control device is started by operating the device power button 28, and the right infrared temperature camera 10 starts to monitor the temperature and image of the utensils on the stove head of the gas stove 1, such as the shape of the utensils, the height of the boiling liquid level, etc.;

[0086] S5: The controller 13 receives and determines the information transmitted by the right infrared temperature camera 10, and determines the type of the vessel on the stove;

[0087] S7: Determine that the vessel is a rice cooker 11, and execute steps S71-S75;

[0088] S71: The controller 13 receives and determines the information transmitted by the infrared temperature camera. When it is determined that the temperature of the upper portion of the rice cooker 11 is close to 100°C and the captured image (continuous steam bubbling, the liquid level about to overflow the upper edge of the rice cooker 11, etc.) meets the programmed characteristic image B, the controller 13 controls the clamping mechanism to clamp the knob 2;

[0089] S72: When the pressure value transmitted to the controller 13 by the flexible pressure sensor 29 reaches the programmed set value, the controller 13 controls the hollow shaft torque servo motor 15 to operate, so that the knob 2 is rotated to the low fire state;

[0090] S73: In the low-fire state, when it is determined that the temperature of the upper portion of the rice cooker 11 is close to 100° C., and the captured image (continuous steam emitting, liquid overflowing the upper edge of the rice cooker 11, etc.) meets the programmed characteristic image C, the controller 13 controls the hollow shaft torque servo motor 15 to operate, so that the knob 2 is rotated to the off-fire state;

[0091] S74: When the knob 2 is rotated to the off state, the knob 2 is stopped by the gas stove 1, and the hollow shaft torque servo motor 15 stops rotating;

[0092] S75: The controller 13 controls the clamping mechanism to release the knob 2, and then controls the hollow shaft torque servo motor 15 to rotate in the opposite direction to the initial position; of course, those skilled in the art can also add a voice prompt function on this basis, emit a prompt sound of "water overflows from the pot, the knob is closed", and display the voice content on the display screen 20.

[0093] In addition, the user can also set the high fire or low fire working time through the high fire time setting key 24, low fire time setting key 26 or voice setting key 27 in the key area 21. When the high or low fire working time is met, the gas stove knob safety control device controls the knob 2 to turn to the gas off state.

[0094] In the description of the present invention, words indicating orientation or positional relationship such as "inside", "outside", "upper", "lower", "front", and "back" are only used to facilitate the description of the present invention, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0095] The above is only one embodiment of the present invention. The protection scope of the present invention is not limited to the above embodiment. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications made without departing from the idea of ​​the present invention are all within the protection scope of the present invention.

Claims

1. A household gas stove knob safety control device, characterized by: It includes a controller (13), a rotating mechanism, a clamping mechanism, an infrared temperature camera and a battery, The rotating mechanism is used to be fixedly arranged on the tabletop (3) of the gas stove (1), and comprises an electric driving element and a hollow rotating body, the electric driving element is used to drive the hollow rotating body to rotate, the rotation axis of the hollow rotating body is the axis K, and the action of the electric driving element is controlled by a controller (13); The clamping mechanism is fixedly connected to the hollow rotating body of the rotating mechanism and is arranged in an inner cavity surrounded by the hollow rotating body. The clamping mechanism is used to clamp the knob (2) of the gas stove (1). The rotation axis of the knob (2) is the axis X. When the clamping mechanism clamps the knob (2), the axis X and the axis K coincide with each other. The action of the clamping mechanism is controlled by a controller (13); The infrared temperature camera is connected to the controller (13) and is used to face the stove head of the gas stove (1) to monitor the temperature and image of the utensils on the stove head; The controller (13) includes a control program, image analysis software and a self-learning adaptive program; The battery is used to power the controller (13), the rotating mechanism, the clamping mechanism and the infrared temperature camera; The clamping mechanism comprises a bracket (35), the bracket (35) is fixedly connected to the hollow rotating body of the rotating mechanism, a slide groove (34) is fixedly provided on the bracket (35), a double-output shaft servo motor (33) is fixedly provided in the middle of the slide groove (34), the double-output shaft servo motor (33) comprises a screw shaft (32), the length direction of the screw shaft (32) is parallel to the length direction of the slide groove (34), the screw shaft (32) comprises a first rotation direction screw shaft (36) and a second rotation direction screw shaft (38) which are coaxially arranged, the external thread R of the first rotation direction screw shaft (36) and the external thread R of the second rotation direction screw shaft (38) are connected to each other. The thread L has opposite rotation directions; the first rotation direction screw shaft (36) is screwed to the right nut slider (31) through the external thread R, and the second rotation direction screw shaft (38) is screwed to the left nut slider (37) through the external thread L; the right nut slider (31) and the slide groove (34) form a pair of moving pairs, and the left nut slider (37) and the slide groove (34) also form a pair of moving pairs; claw plates (17) are fixedly provided on the right nut slider (31) and the left nut slider (37), and the claw plates (17) are used to clamp the knob (2) of the gas stove (1); when the two gripping plates (17) do not contact the knob 2, normal manual operation of the knob is not hindered; An elastic silica gel (18) is provided on the side of the claw plate (17) facing the knob (2); A flexible pressure sensor (29) is provided in the elastic silicone (18), and the flexible pressure sensor (29) is connected to the controller (13).

2. The household gas stove knob safety control device according to claim 1 is characterized in that: The rotating mechanism is specifically a hollow shaft torque servo motor (15), and the hollow shaft torque servo motor (15) comprises a hollow shaft (16).

3. The household gas stove knob safety control device according to claim 2 is characterized in that: The hollow shaft torque servo motor (15) is fixedly connected to the tabletop (3) of the gas stove (1) by any one of gluing, magnetic attraction, and vacuum suction cup.

4. The household gas stove knob safety control device according to claim 1 is characterized in that: The controller (13) is a display PLC controller, comprising a display screen (20) and a keypad (21), the keypad (21) being provided with a device power on / off key (28), a low-fire time setting key (26), a high-fire time setting key (24), and a knob fire off key (22).

5. The household gas stove knob safety control device according to claim 4 is characterized in that: The key area (21) is also provided with a voice setting key (27).

6. The household gas stove knob safety control device according to claim 4 is characterized in that: The key area (21) is also provided with a high-fire indicator light (23) and a low-fire indicator light (25).

7. A method for using the household gas stove knob safety control device according to any one of claims 1 to 6, characterized in that: The steps include: S1: The rotating mechanism of the household gas stove knob safety control device is fixed on the table (3) of the gas stove (1) by means of gluing or magnetic attraction, and the hollow rotating body is concentric with the knob (2) corresponding to the stove head on the gas stove (1); S2: fixing the infrared temperature camera on the range hood (8) above the gas stove (1), so that the shooting range of the infrared temperature camera is adapted to the stove head; S3: Before use, the gas stove (1) has been successfully ignited manually and the knob (2) is pointing to a high fire state; S4: The household gas stove knob safety control device is activated by means of the device power button (28), and the infrared temperature camera begins to monitor the temperature and image of the utensils on the stove head of the gas stove (1); S5: The controller (13) receives and determines the information transmitted by the infrared temperature camera, and determines the type of the vessel on the stove; S6: If it is determined that the vessel is a kettle (5), execute steps S61-S64; S61: The controller (13) receives and determines the information transmitted by the infrared temperature camera. When it is determined that the temperature of the lid (7) of the kettle (5) reaches 100° C. and the captured image meets the programmed characteristic image A, the controller (13) controls the clamping mechanism to clamp the knob (2); S62: When the pressure value transmitted from the flexible pressure sensor (29) to the controller (13) reaches a programmed set value, the controller (13) controls the rotation mechanism to move so that the knob (2) is rotated to the off state; S63: When the knob (2) is rotated to the off-fire state, the knob (2) is stopped by the gas stove (1), and the rotating mechanism stops rotating; S64: The controller (13) controls the clamping mechanism to release the knob (2), and then controls the rotating mechanism to rotate in the opposite direction to the initial position; S7: If it is determined that the vessel is a rice cooker (11), execute steps S71-S75; S71: the controller (13) receives and determines the information transmitted by the infrared temperature camera. When it is determined that the temperature of the upper part of the rice cooker (11) is close to 100° C. and the captured image meets the programmed characteristic image B, the controller (13) controls the clamping mechanism to clamp the knob (2); S72: When the pressure value transmitted from the flexible pressure sensor (29) to the controller (13) reaches a programmed set value, the controller (13) controls the rotation mechanism to move so that the knob (2) is rotated to a low-fire state; S73: In the low-fire state, when it is determined that the temperature of the upper portion of the rice cooker (11) is close to 100° C. and the captured image meets the programmed characteristic image C, the controller (13) controls the rotation mechanism to move the knob (2) to the off-fire state; S74: When the knob (2) is rotated to the off-fire state, the knob (2) is stopped by the gas stove (1), and the rotating mechanism stops rotating; S75: The controller (13) controls the clamping mechanism to release the knob (2), and then controls the rotating mechanism to rotate in the opposite direction to the initial position.

Images