A gas stove with knob display and anti-sticking and anti-overflow function

Abstract

The present invention relates to a knob-display gas stove with anti-sticking and anti-overflow features. The stove comprises a stove body, a stove head, an electronic knob switch with an embedded display screen, a protective bottom shell, a PCB circuit board, a motor airflow valve mechanism, and a retractable temperature sensor. The stove head and the electronic knob switch are correspondingly mounted in mounting holes on the stove body panel. The protective bottom shell and the motor airflow valve mechanism are located at the front and rear sides of the bottom of the stove body panel. The PCB circuit board is located within the protective bottom shell. The stove head and the motor airflow valve mechanism are connected via an air guide pipe. The retractable temperature sensor is embedded in the center of the burner of the stove head, and the top temperature-sensing portion of the retractable temperature sensor is capable of closely contacting the bottom of the pot. The electronic knob switch, the motor airflow valve mechanism, and the retractable temperature sensor are all electrically connected to the PCB circuit board. This gas stove is an electronically controlled gas stove with a reasonable structural design, a compact size, and ease of operation. It can control temperature and intelligently adjust the fire to prevent sticking and overflow.

Description

Technical Field

[0001] The present invention relates to the technical field of gas stoves, in particular to an anti-sticking and anti-overflow electronically controlled gas stove with a knob display capable of controlling temperature. Background Art

[0002] A gas stove is a kitchen appliance that uses a direct flame to heat food using a gaseous fuel, such as liquefied petroleum gas, natural gas, or manufactured coal gas. This fuel is used to provide the heat for cooking. Existing gas stoves consist of a stove body, a burner, a gas valve assembly, and an ignition and adjustment electronic knob switch. The burner is mounted on the stove body to support the pot. The gas valve assembly is mounted on the stove body to deliver gas fuel to the burner for adjusting the burner's power. The adjustment electronic knob switch is rotatably mounted on the stove body and connected to the gas valve assembly.

[0003] There are two main methods for controlling the firepower of existing gas stoves. One is to use a mechanical knob, which indicates the firepower according to the different rotation angles of the knob. This implementation method can only achieve vague adjustment of the firepower, and there is no clear level boundary between different firepower levels. Users often need to check the actual firepower level of the stove head when using it. The other method is to adjust the firepower through an electrically controlled gas valve device, which usually has multiple firepower levels preset. When adjusting the firepower, users can only adjust it according to the level, and cannot achieve precise control of the firepower. In order to make it easier for users to view the firepower levels, a display device is installed in the gas stove, which uses the display device to dynamically display the firepower level of the gas stove head. However, most display devices are touch-sensitive and have no operational feel. Dirt easily accumulates during use, and oil stains on the touch area will affect the user experience.

[0004] In addition, as people's pace of life accelerates, the frequency of telephone use is increasing. Therefore, many users often ignore the dishes they are cooking because they suddenly answer a phone call, which can easily cause the bottom of the dish to burn or overflow the pot. In serious cases, it may even cause a fire. Summary of the Invention

[0005] The object of the present invention is to provide an electronically controlled gas stove which has a simple and reliable structure, is easy to use, has a knob with a temperature control function and can intelligently adjust the fire to prevent burning and overflowing.

[0006] In order to achieve the above-mentioned objectives, the technical solution adopted by the present invention is a knob display anti-sticking and anti-overflow gas stove, comprising a stove body, a stove head, an electronic knob switch with an embedded display screen, a protective bottom shell, a PCB circuit board, a motor airflow valve mechanism, and a retractable temperature sensor. The stove head and the electronic knob switch are correspondingly installed in the mounting holes located on the stove body panel, the protective bottom shell and the motor airflow valve mechanism are respectively arranged on the front and rear sides of the bottom of the stove body panel, the PCB circuit board is arranged inside the protective bottom shell, the electronic knob switch is arranged directly above the PCB circuit board, the stove head and the motor airflow valve mechanism are connected through an air guide pipe, the motor airflow valve mechanism is provided with an air intake main pipe, the retractable temperature sensor is embedded in the center of the burner located on the stove head, and the top temperature sensing part of the retractable temperature sensor can be close to the bottom of the pot, the electronic knob switch, the motor airflow valve mechanism, and the retractable temperature sensor are all electrically connected to the PCB circuit board.

[0007] As an improvement of the present invention, the motor airflow valve mechanism includes an air intake main pipe, a valve body, and an electromagnetic valve, an inner ring gas proportional valve, an outer ring gas proportional valve, a motor valve, an inner ring gas pipe, an outer ring gas pipe, a zero position sensor, an angle sensor and a motor arranged on the valve body. The air intake main pipe is arranged at the air inlet of the main air circuit inside the valve body, the air inlet of the electromagnetic valve is connected to the air outlet of the main air circuit, the air outlet of the electromagnetic valve is connected to the inner ring air circuit and the outer ring air circuit respectively through the inner ring gas proportional valve and the outer ring gas proportional valve, the inner ring air circuit and the outer ring air circuit are both connected to the inner ring gas pipe and the outer ring gas pipe through the motor valve, the motor valve located in the air channel is transmission-connected to the rotating shaft of the motor, the zero position sensor and the angle sensor are both arranged on the rotating part of the motor valve, and the electromagnetic valve, the zero position sensor, the angle sensor and the motor are all connected to the PCB circuit board through wires.

[0008] As an improvement of the present invention, the electronic knob switch includes a hollow encoder, a push-type switch, a hollow knob, a hollow fixing member, a display screen and a transparent cover. The upper part of the protective bottom shell is protruded with a hollow connector, which is connected to the panel hole of the stove body. The hollow connector is fixedly connected to the stove body panel by a fastener. A accommodating cavity is provided in the protective bottom shell, and a PCB circuit board is installed in the accommodating cavity. The hollow encoder is welded on the PCB circuit board. The upper part of the hollow encoder extends into the interior of the hollow connector. The push-type switch is arranged on the PCB circuit board located in the hollow part of the hollow encoder. The lower part of the hollow knob is inserted from the hollow connector and connected to the hollow encoder. The upper part of the hollow knob part protrudes and extends downward to have an extension cover, which can wrap the fastener. The hollow fixing part is arranged in the hollow part of the hollow knob part. The upper part of the hollow fixing part is clamped and connected with the upper part of the hollow knob part. The lower part of the hollow fixing part is fixedly connected to the inner ring of the hollow encoder. The bottom of the hollow fixing part contacts the elastic contact of the push-type switch. The display screen is installed in the display screen mounting slot located on the upper part of the hollow fixing part. The display screen is connected to the PCB circuit board through a wire. The transparent cover is arranged on the top of the hollow knob part, and the display screen cover is arranged inside the transparent cover. The display screen is always facing the transparent cover.

[0009] As an improvement of the present invention, the hollow encoder includes a fixed base, a rotatable outer ring, and an inner ring. The rotatable outer ring can be rotatably mounted on the fixed base, the inner ring is fixedly mounted on the fixed base, and the inner ring is arranged on the inner side of the rotatable outer ring. A plurality of sliding grooves and keyholes are provided on the outer side wall of the rotatable outer ring, and a plurality of inner sliding grooves are provided on the inner side wall of the inner ring. A track and a buckle that are compatible with the sliding grooves and keyholes are provided on the inner side wall of the hollow knob part. The hollow knob part is docked and fixed with the sliding grooves and keyholes of the rotatable outer ring through the track and the buckle. The hollow knob part can rotate with the rotatable outer ring of the hollow encoder. A track that is compatible with the inner sliding groove of the inner ring is provided on the outer side wall of the hollow fixing part, and the hollow fixing part is fixed by clamping with the inner sliding groove of the inner ring through the track.

[0010] As an improvement of the present invention, a support portion protrudes upward and extends from the top of the extension cover, the transparent cover is fixedly connected to the support portion, a lower hanging ear facing upward is provided on the inner side of the support portion, and an upper hanging ear facing downward is provided on the outer side of the upper part of the hollow fixing part. By snap-connecting the upper hanging ear and the lower hanging ear, a limiting connection is made between the hollow knob part and the hollow fixing part, and the hollow fixing part and the hollow knob part can slide up and down together.

[0011] As an improvement of the present invention, the retractable temperature sensor includes a sensor body, a thermal insulation cover, a spring, a bracket and a base. The top of the sensor body is provided with a temperature sensing part. The removable thermal insulation cover is provided on the outside of the sensor body. The temperature sensing part of the sensor body can be movable through the top of the thermal insulation cover so that the temperature sensing part protrudes from the top of the thermal insulation cover. The thermal insulation cover is fixedly connected to the base through the bracket. The bottom end of the sensor body is connected to the ceramic base through a spring. The spring is provided in the hollow part of the bracket. There is a free reciprocating stroke of more than 10 mm between the sensor body and the base.

[0012] As an improvement of the present invention, the stove head includes a supporting base plate, a cast iron bracket, a burner, a thermocouple, an ignition needle, an outer fire nozzle seat, and an inner fire nozzle seat. The supporting base plate is embedded in a mounting hole installed on the stove body panel. The retractable temperature sensor is fixedly installed in the middle of the supporting base plate. The thermocouple and the ignition needle are fixedly installed on both sides of the retractable temperature sensor. The outer fire nozzle seat is installed on the outside of the thermocouple. The outer fire nozzle seat is connected to the outer ring gas pipe through an air guide pipe. The inner fire nozzle seat is installed on the outside of the ignition needle. The inner fire nozzle seat is connected to the inner ring gas pipe through the air guide pipe. The burner is sleeved on the outside of the outer fire nozzle seat, the inner fire nozzle seat, the thermocouple, the ignition needle, and the retractable temperature sensor. The cast iron bracket cover is arranged on the outer periphery of the burner. The ignition needle and the thermocouple are both connected to the PCB circuit board through wires.

[0013] As an improvement of the present invention, the burner includes an inner ring fire cover, an outer ring fire cover, and a gas mixing chamber. The gas mixing chamber is placed on a supporting base plate. An outer ring base and an inner ring base are respectively arranged on the gas mixing chamber. A circle of annular air duct is opened in the outer ring base and the inner ring base. The outer ring fire cover and the inner ring fire cover are respectively clamped and installed on the outer ring base and the inner ring base. A circle of annular air duct and a plurality of flame holes connected to the annular air duct are opened in the inner ring fire cover and the outer ring fire cover. An inner ring air inlet and an outer ring air inlet are respectively opened on the side walls of the gas mixing chamber. The inner ring air inlet is aligned with the inner fire nozzle seat, and the outer ring air inlet is aligned with the outer fire nozzle seat. The inner ring air inlet is connected to the inner ring fire cover, and the outer ring air inlet is connected to the outer ring fire cover.

[0014] As an improvement of the present invention, the PCB circuit board is provided with a voltage-stabilized power supply module, a power supply module, an MCU, an electromagnetic valve drive module, an ignition module, a display drive module, a motor drive module, a fire control module, a temperature control module, and a communication module. The input end of the voltage-stabilized power supply module is connected to a 110V-250V AC power supply, and the output end of the voltage-stabilized power supply module is connected to the power supply module. The power supply module is connected to the MCU, the electromagnetic valve drive module, the ignition module, the display drive module, the motor drive module, the fire control module, the temperature control module, the communication module, the hollow encoder, the display screen, the retractable temperature sensor, and the thermocouple. The electromagnetic valve drive module, the ignition module, the display drive module, the motor drive module, the fire control module, the temperature control module, the communication module, and the thermocouple are all connected to the MCU. The electromagnetic valve is connected to the electromagnetic valve drive module, the ignition pin and the push-type switch are connected to the ignition module, the display screen is connected to the display drive module, the hollow encoder and the retractable temperature sensor are connected to the temperature control module, the motor is connected to the motor drive module, and the zero position sensor and the angle sensor are connected to the fire control module.

[0015] As an improvement of the present invention, the stove head adopts a full top air intake structure, and the gas does not come into contact with the air from the pipeline to the stove body structure and stove body pipeline, and is only mixed with the external air in the gas mixing chamber of the stove head.

[0016] Compared to the prior art, the gas stove proposed in the present invention is an electronically controlled gas stove with an ingenious overall structural design, a rational and stable structure, a compact size, and ease of use. A cylindrical electronic rotary switch mounted on the stove panel allows for pressing to ignite and rotating to adjust the desired temperature of the pot bottom. A display screen embedded in the center of the electronic rotary switch dynamically displays temperature data, allowing the user to intuitively understand and confirm the adjusted temperature value. Furthermore, the unique structure of the electronic rotary switch ensures that the built-in display screen remains fixed and facing the user during rotation, achieving optimal visual quality. Furthermore, the gas stove utilizes a motorized airflow valve mechanism comprising a solenoid valve, an inner ring gas proportional valve, an outer ring gas proportional valve, a motor valve, an inner ring gas pipe, an outer ring gas pipe, a zero position sensor, an angle sensor, and a motor. Combined with an MCU and a retractable temperature sensor on a PCB circuit board, the gas power of the outer and inner ring air ducts on the stove burner can be precisely adjusted to maintain the desired pot bottom temperature, preventing burns and overflows. The gas stove's burner utilizes a fully top-up air intake structure. Gas enters the stove body and its internal piping from the main intake pipe, avoiding contact with air until it mixes with external air in the stove's gas mixing chamber. This effectively prevents gas leaks from the stove body and significantly increases the stove's safety. Furthermore, a retractable temperature sensor is installed in the middle of the burner. The sensor's top sensing portion fits snugly against the bottom of the pot. This sensor monitors the bottom temperature of the pot placed on the burner in real time and sends real-time feedback to the PCB, enabling intelligent temperature control and flame adjustment. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a schematic diagram of the front structure of a gas stove according to a preferred embodiment of the present invention.

[0018] Figure 2 This is a schematic side structural diagram of a gas stove according to a preferred embodiment of the present invention.

[0019] Figure 3 The figure is a schematic structural diagram of an electronic knob switch in a gas stove according to a preferred embodiment of the present invention.

[0020] Figure 4 Schematic diagram of the structure of a hollow encoder according to a preferred embodiment of the present invention.

[0021] Figure 5 This is a schematic structural diagram of a motor airflow valve mechanism in a gas stove according to a preferred embodiment of the present invention.

[0022] Figure 6 This is a schematic diagram of the connection structure between the motor airflow valve mechanism, the stove head and the PCB circuit board in the gas stove of the preferred embodiment of the present invention.

[0023] Figure 7 The figure is a schematic structural diagram of a burner in a gas stove according to a preferred embodiment of the present invention.

[0024] In the figure: 1- stove body, 2- stove head, 3- electronic knob switch, 4- protective bottom shell, 5- motor airflow valve mechanism, 6- retractable temperature sensor, 7- hollow encoder, 8- push switch, 9- hollow knob, 10- hollow fixing part, 11- display screen, 12- transparent cover, 13- hollow connector, 14- fastener, 15- fixed base, 16- rotatable outer ring, 17- inner ring, 18- keyhole, 19- slide groove, 20- inner slide groove, 21- air intake manifold, 22- electromagnetic gas valve, 23- inner ring gas proportional valve, 2 4-outer ring gas proportional valve, 25-inner ring gas pipe, 26-outer ring gas pipe, 27-zero position sensor, 28-angle sensor, 29-motor, 30-inner fire nozzle seat, 31-thermocouple, 33-ignition needle, 34-outer fire nozzle seat, 35-power module, 36-motor drive module, 37-temperature control module, 38-ignition module, 39-MCU, 40-communication module, 41-voltage-stabilized power supply module, 42-cast iron bracket, 43-inner ring fire cover, 44-outer ring fire cover, 45-gas mixing chamber, 46-water tray. DETAILED DESCRIPTION

[0025] In order to deepen the understanding and recognition of the present invention, the present invention is further described and introduced below with reference to the accompanying drawings.

[0026] like Figure 1 and 2The figure shows a preferred embodiment of a gas stove with a knob display and anti-sticking and anti-overflow function. The gas stove comprises a stove body 1, a stove head 2, an electronic knob switch 3 with an embedded display screen 11, a protective bottom housing 4, a PCB circuit board, a motor airflow valve mechanism 5, and a retractable temperature sensor 6. The stove head 2 and the electronic knob switch 3 are mounted in corresponding mounting holes on the front panel of the stove body 1. The stove heads 2 and the electronic knob switches 3 are arranged in pairs, which can be configured as a single stove head 2 and a single electronic knob switch 3, or as a pair of stove heads 2 and two electronic knob switches 3. The protective bottom housing 4 and the motor airflow valve mechanism 5 are respectively located on the front and rear sides of the bottom panel of the stove body 1. The PCB circuit board is located within the protective bottom housing 4, isolating the PCB circuit board from the stove body 1 and the stove head 2, effectively ensuring the PCB circuit board's good performance and lifespan. The electronic knob switch 3 is located directly above the PCB circuit board, effectively ensuring the structural reliability of the electronic knob switch 3. The motor-operated airflow valve mechanism 5 is equipped with an air intake manifold 21, through which gas is fed into the motor-operated airflow valve mechanism 5. The stovetop 2 and the motor-operated airflow valve mechanism 5 are connected via an air guide. The motor-operated airflow valve mechanism 5 regulates the amount of gas entering the stovetop 2, thereby controlling the power of the stovetop 2. A retractable temperature sensor 6 is embedded in the center of the burner of the stovetop 2, with its top temperature-sensing portion positioned in close contact with the bottom of the pot. This retractable temperature sensor 6 monitors the bottom temperature of the pot placed on the stovetop 2 in real time and provides real-time feedback to the PCB, enabling intelligent temperature control and flame adjustment. The electronic rotary switch 3, the motor-operated airflow valve mechanism 5, and the retractable temperature sensor 6 are all electrically connected to the PCB, enabling the electronic control of the gas stove.

[0027] Among them, Figure 3As shown, the electronic rotary switch 3 includes a hollow encoder 7, a push-type switch 8, a hollow knob 9, a hollow fixing member 10, a display screen 11, and a transparent cover 12. A hollow connector 13 protrudes from the upper portion of the protective bottom shell 4. The protective bottom shell 4 and the hollow connector 13 are integrally formed, providing good structural stability. The hollow connector 13 is inserted through the panel hole of the stove body 1 and abutted and fixed to the stove body 1 panel by a fastener 14. The fastener 14 is a nut-locking structure, thereby fixing the entire electronic rotary switch 3 to the stove body 1. Specifically, the hollow connector 13 extends from the stove body 1 panel hole. The outer wall of the protruding portion of the hollow connector 13 is provided with a connecting thread. The fastener 14 is threadedly connected to the protruding portion of the hollow connector 13, and the lower portion of the fastener 14 abuts the stove body 1 panel surface located outside the panel hole of the stove body 1. This installation structure is simple and reliable, and easy to disassemble and maintain. The display screen 11 adopts an OLED display screen. The OLED display screen is a display screen made of organic light-emitting diodes. It has the advantages of simple structure, self-luminescence without backlight, small size, thin thickness, high contrast, wide viewing angle, fast response speed, and wide display temperature range.

[0028] In order to improve the compactness, stability, reliability and aesthetic appearance of the installation structure of the electronic knob switch 3, the height of the fastener 14 is set to be consistent with the height of the protruding part of the hollow connector 13. After the fastener 14 is inserted into the hollow connector 13, the upper and lower ends of the two are flush, and the fastener 14 can abut against the surface of the stove body 1 panel, thereby effectively preventing water stains and oil stains on the stove top from entering the panel hole and affecting the service life of the protective bottom shell 4.

[0029] A housing cavity is provided in the protective bottom shell 4, into which a PCB is embedded. A hollow encoder 7 is welded to the PCB, protruding from the upper surface of the PCB. The upper portion of the hollow encoder 7 fits snugly into the interior of the hollow connector 13, which further limits and secures the hollow encoder 7. A push-type switch 8 is also welded to the PCB and disposed within the hollow portion of the hollow encoder 7. The lower portion of the hollow knob 9 is inserted through the hollow connector 13 and fixedly connected to the rotatable outer ring 16 of the hollow encoder 7. Rotating the hollow knob 9 drives the rotatable outer ring 16 of the hollow encoder 7 to rotate, thereby outputting a control signal from the electronic rotary switch 3. The upper part of the hollow fixing part 10 is snap-connected with the upper part of the hollow knob part 9, and the hollow fixing part 10 can slide up and down a certain distance together with the hollow knob part 9. The hollow fixing part 10 is sleeved on the hollow part of the hollow knob part 9, and the hollow fixing part 10 is arranged in the positioning hole in the middle of the hollow encoder 7. The lower part of the hollow fixing part 10 is fixedly connected to the inner ring 17 of the hollow encoder 7. At the same time, the bottom of the hollow fixing part 10 contacts the contact of the push-type switch 8. Specifically, the elastic contact of the push-type switch 8 is protruded from the top of the push-type switch 8, and the elastic contact is installed on the push-type switch 8 through a spring structure. The spring structure has a strong elastic force, which can keep the hollow knob part 9, the hollow fixing part 10, the display screen 11 and the transparent cover 12 in a bounced state at all times when they are not subjected to downward pressure. The bottom of the hollow fixing member 10 is set to be a semicircular hollow shape and a semicircular non-hollow shape, wherein the height of the semicircular hollow part is lower than that of the semicircular non-hollow part. The semicircular hollow part of the hollow fixing member 10 is further fitted into contact with the upper surface of the elastic contact of the push-type switch 8, and the semicircular non-hollow part of the hollow fixing member 10 is suspended above the push-type switch 8, so that when the hollow knob member 9 is pressed, the hollow fixing member 10 can be pressed at the same time, so that the bottom of the hollow fixing member 10 presses down the elastic contact of the push-type switch 8 to realize the output of the ignition signal of the electronic knob switch 3. Display screen 11 is embedded in a display screen 11 mounting slot located above hollow fixture 10. Display screen 11 is connected to the PCB via wires. A transparent cover 12 covers the top of hollow knob 9, enclosing display screen 11 within transparent cover 12. Transparent cover 12 isolates and protects the hollow portion of hollow knob 9 and display screen 11, preventing airborne contamination of display screen 11 and components within the hollow portion of hollow knob 9, which could affect performance and service life. During rotation of hollow knob 9, display screen 11 remains directly opposite transparent cover 12 and does not rotate with it, ensuring optimal viewing angles for data on display screen 11.

[0030] Furthermore, if Figure 4As shown, the hollow encoder 7 employs a hollow shaft encoder comprising a fixed base 15, a rotatable outer ring 16, and an inner ring 17. The fixed base 15 is provided with solder pins, through which the encoder is soldered to the PCB. The rotatable outer ring 16 is rotatably mounted on the fixed base 15 and is electrically connected to the solder pins on the fixed base 15. The inner ring 17 is fixedly mounted on the fixed base 15 and insulated from the solder pins on the fixed base 15. The inner ring 17 is positioned inside the rotatable outer ring 16. The encoder has a rated voltage of DC 5V, and the rotatable outer ring 16 has a rotational lifespan exceeding 50,000 cycles.

[0031] In order to facilitate the installation and fixation between the hollow knob member 9 and the hollow fixing member 10 and the hollow encoder 7, a plurality of sliding grooves 19 and keyholes 18 are provided on the outer side wall of the rotatable outer ring 16, and a plurality of inner sliding grooves 20 are provided on the inner side wall of the inner ring 17. Correspondingly, tracks and buckles that match the sliding grooves 19 and keyholes 18 are provided on the inner side wall of the hollow knob member 9. The hollow knob member 9 is fixedly connected to the sliding grooves 19 and keyholes 18 of the rotatable outer ring 16 through the tracks and buckles, forming a locking structure, so that the hollow knob member 9 can rotate together with the rotatable outer ring 16 of the hollow encoder 7. Tracks that match the inner sliding grooves 20 of the inner ring 17 are provided on the outer side wall of the hollow fixing member 10. The hollow fixing member 10 is fixedly connected to the inner sliding grooves 20 of the inner ring 17 through the tracks. The hollow fixing member 10 can slide up and down in the inner sliding grooves 20 of the inner ring 17 but cannot rotate.

[0032] Furthermore, the upper portion of the hollow knob member 9 protrudes downwardly and is provided with an extension cover. The extension cover can enclose the fastener 14, providing isolation and protection for the fastener 14 and enhancing the aesthetic appearance of the knob device. Furthermore, the height of the extension cover should be at least 3 / 4-4 / 5 of the height of the fastener 1410 to ensure that the majority of the exposed surface of the fastener 14 is enclosed by the extension cover. During use, the extension cover can be used to completely enclose the fastener 14, thereby effectively improving the aesthetic appearance of the knob device. Furthermore, to reduce frictional resistance between the extension cover and the contact portions of the fastener 14 and the hollow connector 13 during rotation of the hollow knob member 9, a buffer or sealing gasket is provided between the extension cover, the fastener 14, and the hollow connector 13.

[0033] Furthermore, a support portion protrudes upward from the top of the extension cover, and the transparent cover 12 is fixedly connected to the support portion. Specifically, the transparent cover 12 and the support portion of the hollow knob member 9 can be fixed by a threaded connection or a snap-on connection. The transparent cover 12 adopts a concave structure in the middle, which not only facilitates viewing the content displayed on the internal display screen 11, but also facilitates finger gripping. A lower hanging ear is provided on the inner side of the support portion, and an upper hanging ear is provided on the upper outer side of the hollow fixing member 10, with the lower end of the lower hanging ear flush with the upper end of the upper hanging ear. The lower hanging ear and the upper hanging ear are arranged in pairs, and the number of lower hanging ears and upper hanging ears is at least two. By snap-connecting the upper hanging ear and the lower hanging ear, a hanging ear connection structure is formed, which enables a position-limiting connection between the hollow knob member 9 and the hollow fixing member 10, and the hollow fixing member 10 and the hollow knob member 9 can slide up and down together.

[0034] like Figure 5 and 6 As shown, the motor air flow valve mechanism 5 includes an air intake manifold 21, a valve body, and a solenoid valve 22, an inner ring gas proportional valve 23, an outer ring gas proportional valve 24, a motor valve, an inner ring gas pipe 25, an outer ring gas pipe 26, a zero position sensor 27, an angle sensor 28 and a motor 29. The air intake manifold 21 is arranged at the air inlet of the main air path inside the valve body, the air inlet of the solenoid valve 22 is connected to the air outlet of the main air path, and the air outlet of the solenoid valve 22 is connected to the air outlet of the main air path. The inner and outer gas circuits are connected via inner and outer gas proportional valves 23 and 24, respectively. These are then connected to inner and outer gas pipes 25 and 26 via motor valves. The motor valves are in driving connection with the shaft of motor 29. Rotation of the motor 29 not only controls the opening and closing of the motor valves, but also adjusts the valve opening and closing of the motor valves, thereby varying the gas flow rate or pressure delivered to the stovetop 2 and adjusting the heat output on the stovetop 2. A zero position sensor 27 and an angle sensor 28 are both located on the rotating portion of the motor valves. The solenoid valve 22, zero position sensor 27, angle sensor 28, and motor 29 are all connected to the PCB via wires.

[0035] The gas supply to the main intake pipe 21 is controlled by a solenoid valve 22 and divided into inner and outer ring gas. The inner ring gas passes through the inner ring gas proportional valve 23 and then through a motor valve to control the metered flow before reaching the inner ring gas pipe 25. Finally, it reaches the inner ring of the stove head 2, forming the inner ring flame. Similarly, the outer ring gas passes through the outer ring gas proportional valve 24 and then through a motor valve to control the metered flow before reaching the outer ring gas pipe 26. Finally, it reaches the outer ring of the stove head 2, forming the outer ring flame. The amount of gas passing through is controlled by a motor valve linked to a motor 29. Motor 29 is controlled by a zero position sensor 27 and an angle sensor 28, working in conjunction with an MCU 39 on a PCB. When power is first applied, motor 29 rotates because the current angle between motor 29 and the motor valve cannot be determined. When it reaches a certain angle and triggers the zero position sensor 27, motor 29 stops. The zero position sensor 27 sends a zero position signal to inform the MCU 39 that motor 29 is now at zero position. The MCU 39 controls the motor 29 to continue rotating according to the position and the angle information fed back by the angle sensor 28 during rotation, so as to achieve the purpose of controlling the angle of the motor valve.

[0036] Preferably, the motor 29 is a stepper motor 29, the solenoid valve 22 is a self-priming solenoid valve, and the motor valve is a plug valve. The gas outlet of the self-priming solenoid valve is connected to the plug valve through the inner ring gas proportional valve 23 and the outer ring gas proportional valve 24. The valve stem shaft of the plug valve is directly connected to the rotating shaft of the stepper motor 29, and the zero position sensor 27 and the angle sensor 28 are both arranged on the valve stem shaft of the plug valve.

[0037] It is further preferred that the zero position sensor 27 includes a static metal needle and a movable metal needle. The static metal needle is fixedly mounted on the valve stem shaft of the plug valve. The movable metal needle can rotate along with the valve stem shaft of the plug valve, and during the rotation of the movable metal needle, the static metal needle can come into contact with the movable metal needle. When the static metal needle comes into contact with the movable metal needle, a zero position signal is output.

[0038] The retractable temperature sensor 6 includes a sensor body, a heat-insulating cover, a spring, a bracket and a ceramic base. A temperature-sensing part is provided at the top of the sensor body. The removable heat-insulating cover is arranged on the outside of the sensor body. The temperature-sensing part of the sensor body can move through the top of the heat-insulating cover so that the temperature-sensing part protrudes from the top of the heat-insulating cover. The heat-insulating cover is fixedly connected to the ceramic base through the bracket. The bottom end of the sensor body is connected to the ceramic base through a spring. The spring is arranged in the hollow part of the bracket. There is a free reciprocating stroke of more than 10 mm between the sensor body and the ceramic base, and the sensor body can slide up and down relative to the ceramic base.

[0039] A gap forms an insulating cavity between the outer periphery of the sensor body and the outer wall of the insulating cover. The insulating cover is a downward-facing cylindrical shell, facilitating rapid heat dissipation from the sensor body. A bracket is mounted on the inner sidewall of the cylindrical shell. A through-hole is provided at the top of the insulating cover, creating a tight fit between the outer periphery of the sensor's temperature-sensing portion and the wall of the through-hole. The sensor body comprises a heat collection plate, a temperature sensor, and a housing. The temperature sensor is located within the housing. The heat collection plate is located at the top of the housing, forming the temperature-sensing portion and closely abutting the temperature-measuring portion of the temperature sensor. The bottom of the housing is connected to a spring, and the temperature sensor is connected to the PCB via wires.

[0040] When a pot is placed on the stove 2, the temperature sensor is directly in contact with the bottom of the pot because it is supported by the bracket. At the same time, there is a spring in the bracket, so when the pot is put down, the temperature sensor is also pressed down, which means that it will not form an obstruction to the bottom of the pot and can always fit tightly to the bottom of the pot.

[0041] like Figure 6 and 7 As shown, the stove head 2 includes a supporting base plate, a cast iron bracket 42, a burner, a thermocouple 31, an ignition needle 33, an outer fire nozzle seat 34, and an inner fire nozzle seat 30. The supporting base plate is embedded in the mounting hole installed on the panel of the stove body 1. The retractable temperature sensor 6 is fixedly installed in the middle of the supporting base plate. The thermocouple 31 and the ignition needle 33 are fixedly installed on both sides of the retractable temperature sensor 6. The outer fire nozzle seat 34 is installed on the outside of the thermocouple 31. The outer fire nozzle seat 34 is connected to the outer ring gas pipe 26 through the air guide pipe. The inner fire nozzle seat 30 is installed on the outside of the ignition needle 33. The inner fire nozzle seat 30 is connected to the inner ring gas pipe 25 through the air guide pipe. The burner is sleeved on the outside of the outer fire nozzle seat 34, the inner fire nozzle seat 30, the thermocouple 31, the ignition needle 33, and the retractable temperature sensor 6. The cast iron bracket 42 is covered on the outer periphery of the burner. The ignition needle 33 and the thermocouple 31 are both connected to the PCB circuit board through wires. Thermocouple 31 and solenoid valve 22 together form the gas stove's flameout protection device (a feature that automatically shuts off the gas supply when the flame goes out). Thermocouple 31 detects flames. When the flame temperature detected by thermocouple 31 falls below a specified temperature, the solenoid valve 22 is immediately closed via the PCB, effectively shutting off gas leakage in the event of an unexpected flameout. This flameout protection device typically lasts approximately 10 seconds, boasting a simple and reliable structure, stable performance, and a long service life.

[0042] Furthermore, the burner includes an inner ring fire cover 43, an outer ring fire cover 44, and a gas mixing chamber 45. The gas mixing chamber 45 is placed on a supporting base plate. An outer ring base and an inner ring base are respectively provided on the gas mixing chamber 45. An annular gas passage is provided in the outer ring base and the inner ring base. The outer ring fire cover 44 and the inner ring fire cover 43 are respectively mounted on the outer ring base and the inner ring base. An annular gas passage and a plurality of flame holes connected to the annular gas passage are provided in the inner ring fire cover 43 and the outer ring fire cover 44. An inner ring air inlet and an outer ring air inlet are respectively provided on the side walls of the gas mixing chamber 45. The inner ring air inlet is aligned with the inner fire nozzle seat 30, and the outer ring air inlet is aligned with the outer fire nozzle seat 34. The inner ring air inlet is connected to the inner ring fire cover 43, and the outer ring air inlet is connected to the outer ring fire cover 44. The annular gas passages on the outer ring fire cover 44 and the inner ring fire cover 43 respectively form annular gas chambers with the annular gas passages on the outer ring base and the inner ring base for evenly distributing the fuel gas to each flame-spraying hole.

[0043] In addition, the stove head 2 also includes a water pan 46, which is embedded in a mounting hole on the stove body 1 panel. The water pan 46 is arranged on the periphery of the support base. When the pot overflows, the liquid flowing out can be collected in the water pan 46. A mounting hole is provided in the middle of the water pan 46, and the support base is embedded in the mounting hole.

[0044] Furthermore, the stove head 2 utilizes a top-up air intake structure. Gas enters the stove body 1 and its internal piping from the intake manifold 21 without coming into contact with the air until it is mixed with the outside air at the gas mixing chamber 45 of the stove head 2. This structure ensures the design requirement of preventing gas leakage within the stove body 1 and further enhances the safety of the PCB circuit board used within the stove body as the entire control circuit.

[0045] The PCB circuit board is provided with a voltage-stabilized power supply module 41, a power supply module 35, an MCU 39, an electromagnetic valve drive module, an ignition module 38, a display drive module, a motor drive module 36, a fire control module, a temperature control module 37, and a communication module 40. The input end of the voltage-stabilized power supply module 41 is connected to a 110V-250V mains power supply. The voltage-stabilized power supply module 41 uses a voltage-stabilized switching power supply, which can convert the 110V-250V mains power supply into the voltage and current required by the power supply module 35. The output end of the voltage-stabilized power supply module 41 is connected to the power supply module 35. The power supply module 35 is connected to the MCU 39 and the electromagnetic valve. The driver module, ignition module 38, display driver module, motor driver module 36, power control module, temperature control module 37, communication module 40, hollow encoder 7, display screen 11, retractable temperature sensor 6, and thermocouple 31 are all connected to the MCU 39. The solenoid valve driver module, ignition module 38, display driver module, motor driver module 36, power control module, temperature control module 37, communication module 40, and thermocouple 31 are all connected to the MCU 39. The solenoid valve 22 is connected to the solenoid valve driver module. The ignition pin 33 and push-type switch 8 are connected to the ignition module 38, which uses a pulsed ignition circuit. The display screen 11 is connected to the display driver module, the hollow encoder 7 and retractable temperature sensor 6 are connected to the temperature control module 37, the motor 29 is connected to the motor driver module 36, and the zero position sensor 27 and angle sensor 28 are connected to the power control module. Mobile terminals (such as mobile phones and iPads) can establish a communication connection with the MCU 39 through the communication module 40, thereby enabling remote control of the gas stove.

[0046] The gas stove's anti-sticking and anti-overflow functions are implemented by a PCB circuit board, a retractable temperature sensor 6, and a motor-operated airflow valve mechanism 5. After the temperature value is set on the PCB circuit board, the retractable temperature sensor 6 monitors the temperature inside the pot and feeds it back to the MCU 39 on the PCB circuit board. The MCU 39 then determines whether the temperature inside the pot is too high or too low compared to the set temperature, and then controls the motor-operated airflow valve mechanism 5 to reduce or increase the gas flow accordingly to achieve the purpose of maintaining the temperature.

[0047] When the electronic knob switch 3 is pressed for a few seconds (to release the child lock), an ignition signal is issued, and the ignition needle 33 starts to ignite. Without releasing the electronic knob switch 3, rotate the electronic knob switch 3 to the required temperature value and then release it to confirm. At this time, the retractable temperature sensor 6 starts to detect the temperature. When the temperature does not reach the required temperature value, the motor airflow valve mechanism 5 will open the airflow, and the motor airflow valve mechanism 5 and the MCU39 of the PCB circuit board will adjust the gas airflow size accordingly according to the temperature difference. When the detected temperature value is close to the set temperature value, the motor airflow valve mechanism 5 will reduce the airflow. As the temperature continues to approach the set temperature value, the airflow is reduced, and the flame will also become smaller, ultimately achieving the effect of maintaining the temperature, thereby realizing the anti-sticking and anti-overflow functions.

[0048] Using the gas stove shown in this preferred embodiment, you can directly set the desired temperature for the cookware via the electronic knob. For example, frying eggs at 80°C will result in the burnt eggs being kept at that temperature. If the stove is unattended and the water level in the pot decreases, causing the temperature to rise, the flame on the stove will automatically decrease until it turns off, preventing the bottom from burning. Similarly, soups can be kept below boiling point to prevent overflowing. Furthermore, because the temperature is kept low, the amount of oil smoke generated is significantly reduced, and the carcinogens typically produced by high-temperature oils are virtually absent, contributing to a healthier diet for the user.

[0049] The technical means disclosed in the solutions of the present invention are not limited to those disclosed in the above-mentioned embodiments, but also include technical solutions composed of any combination of the above-mentioned technical features. It should be noted that those skilled in the art may make various improvements and modifications without departing from the principles of the present invention, and such improvements and modifications are also considered to be within the scope of protection of the present invention.

Claims

1. A gas stove with a knob display that prevents sticking and overflowing, characterized by: The stove comprises a stove body, a stove head, an electronic knob switch with an embedded display screen, a protective bottom shell, a PCB circuit board, a motor airflow valve mechanism, and a retractable temperature sensor. The stove head and the electronic knob switch are correspondingly mounted in mounting holes on the stove body panel. The protective bottom shell and the motor airflow valve mechanism are respectively located on the front and rear sides of the bottom of the stove body panel. The PCB circuit board is located inside the protective bottom shell, which has a receiving cavity, and the PCB circuit board is installed in the receiving cavity. The electronic knob switch is arranged just above the PCB circuit board. The electronic knob switch includes a hollow encoder, a push-type switch, a hollow knob part, a hollow fixing part, a display screen and a transparent cover. A hollow connector is protruded from the upper part of the protective bottom shell. The protective bottom shell and the hollow connector are integrally formed. The hollow connector is connected to the panel hole of the stove body. The hollow connector is fixedly connected to the stove panel through a fastener. The hollow connector is extended from the stove panel hole. A connecting thread is provided on the outer side wall of the extended part of the hollow connector. The fastener is threadedly connected to the extended part of the hollow connector, and the lower part of the fastener is in contact with the stove panel surface located at the periphery of the stove panel hole. The height of the fastener is set to be consistent with the height of the extended part of the hollow connector. The device is welded on the PCB circuit board, the upper part of the hollow encoder extends into the inside of the hollow connector, and the push-type switch is arranged on the PCB circuit board located in the hollow part of the hollow encoder. The lower part of the hollow knob is inserted from the hollow connector and fixedly connected to the rotatable outer ring of the hollow encoder. Rotating the hollow knob can drive the rotatable outer ring of the hollow encoder to rotate together, thereby realizing the control signal output of the electronic knob switch. The lower part of the hollow fixing part is fixedly connected to the inner ring of the hollow encoder, and the bottom of the hollow fixing part contacts the elastic contact at the top of the push-type switch. The elastic contact is used to keep the hollow knob part, the hollow fixing part, the display screen and the transparent cover in a bounced state at all times when no downward pressure is applied. The bottom of the hollow fixing part is set to be a semicircular hollow. The hollow knob comprises a first portion which is shaped like a circle and a second portion which is semicircular and non-hollow. The height of the semicircular hollow portion is lower than that of the semicircular non-hollow portion. The semicircular hollow portion of the hollow fixing piece is in contact with the upper surface of the elastic contact of the push-type switch. The semicircular non-hollow portion of the hollow fixing piece is suspended above the push-type switch, so that when the hollow knob piece is pressed, the hollow fixing piece can be pressed at the same time, so that the bottom of the hollow fixing piece presses down the elastic contact of the push-type switch to realize the output of the ignition signal of the electronic knob switch. The hollow fixing piece is arranged in the hollow part of the hollow knob piece, and the upper part of the hollow fixing piece is snap-connected with the upper part of the hollow knob piece. The display screen is installed in the display screen mounting slot located on the upper part of the hollow fixing piece. The display screen is connected to the PCB circuit board through a wire, and the transparent cover is arranged on the hollow knob piece. The top of the button piece, the upper part of the hollow knob piece protrudes downward and is provided with an extension cover, which can wrap the fastener, and a buffer or sealing gasket is provided between the extension cover and the contact part of the fastener and the hollow connector, and a support part is protruded upward and extended on the top of the extension cover, and a lower hanging ear facing upward is provided on the inner side of the support part, and an upper hanging ear facing downward is provided on the upper outer side of the hollow fixing piece, and the hollow knob piece and the hollow fixing piece are limitedly connected by snapping the upper hanging ear and the lower hanging ear. The hollow fixing piece and the hollow knob piece can slide up and down together, and the transparent cover is fixedly connected to the support part, and the display screen cover is provided inside the transparent cover. During the rotation of the hollow knob piece, the display screen always faces the transparent cover and does not rotate with the hollow knob piece; The stovetop and the motor airflow valve mechanism are connected via an air guide pipe. The motor airflow valve mechanism is equipped with an air intake manifold. A retractable temperature sensor is embedded in the center of the stovetop burner, and the top temperature-sensing portion of the retractable temperature sensor can be in close contact with the bottom of the pot. The electronic knob switch, the motor airflow valve mechanism, and the retractable temperature sensor are all electrically connected to the PCB circuit board. The motor airflow valve mechanism includes an air intake main pipe, a valve body, and an electromagnetic valve, an inner ring gas proportional valve, an outer ring gas proportional valve, a motor valve, an inner ring gas pipe, an outer ring gas pipe, a zero position sensor, an angle sensor and a motor arranged on the valve body. The air intake main pipe is arranged at the air inlet of the main air circuit inside the valve body, the air inlet of the electromagnetic valve is connected to the air outlet of the main air circuit, the air outlet of the electromagnetic valve is connected to the inner ring air circuit and the outer ring air circuit respectively through the inner ring gas proportional valve and the outer ring gas proportional valve, and the inner ring air circuit and the outer ring air circuit are both connected through the motor valve. The inner ring gas pipe and the outer ring gas pipe are connected, and the motor valve is connected to the rotating shaft of the motor. The inner ring gas passes through the inner ring gas proportional valve and then through the motor valve to control the quantitative flow to the inner ring gas pipe. The outer ring gas passes through the outer ring gas proportional valve and then through the motor valve to control the quantitative flow to the outer ring gas pipe. The amount of gas passing through the inner ring gas pipe and the outer ring gas pipe is controlled by the motor valve linked to the motor. The zero position sensor and the angle sensor are both arranged on the rotating part of the motor valve. The electromagnetic valve, zero position sensor, angle sensor and motor are all connected to the PCB circuit board through wires; The gas stove's anti-sticking and anti-overflow functions are achieved through a PCB circuit board, a retractable temperature sensor, and a motor-operated airflow valve mechanism. The PCB circuit board is equipped with an MCU. After the desired cookware temperature is set on the PCB circuit board using an electronic knob switch, the retractable temperature sensor monitors the bottom temperature of the cookware placed on the stovetop in real time and feeds this back to the MCU. Based on the zero-position signal sent by the zero-position sensor and the angle information fed back by the rotational angle sensor, the MCU controls the rotation of the motor to control the valve switching amount of the motor valve, thereby correspondingly changing the gas flow or gas pressure delivered to the stovetop. This adjusts the firepower of the outer and inner ring air ducts on the stovetop burner to maintain the temperature.

2. A gas stove with anti-sticking and anti-overflow knob display according to claim 1, characterized in that: The hollow encoder includes a fixed base, a rotatable outer ring, and an inner ring. The rotatable outer ring can be rotatably mounted on the fixed base, the inner ring is fixedly mounted on the fixed base, and the inner ring is arranged on the inner side of the rotatable outer ring. A plurality of sliding grooves and keyholes are provided on the outer side wall of the rotatable outer ring, and a plurality of inner sliding grooves are provided on the inner side wall of the inner ring. A track and a buckle that are compatible with the sliding grooves and keyholes are provided on the inner side wall of the hollow knob part. The hollow knob part is docked and fixed with the sliding grooves and keyholes of the rotatable outer ring through the track and the buckle. The hollow knob part can rotate with the rotatable outer ring of the hollow encoder. A track that is compatible with the inner sliding groove of the inner ring is provided on the outer side wall of the hollow fixing part, and the hollow fixing part is fixed by clamping with the inner sliding groove of the inner ring through the track.

3. A gas stove with anti-sticking and anti-overflow knob display according to any one of claims 1-2, characterized in that: The retractable temperature sensor includes a sensor body, a thermal insulation cover, a spring, a bracket and a base. The top of the sensor body is provided with a temperature sensing part. The removable thermal insulation cover is provided on the outside of the sensor body. The temperature sensing part of the sensor body can be movable through the top of the thermal insulation cover so that the temperature sensing part protrudes from the top of the thermal insulation cover. The thermal insulation cover is fixedly connected to the base through the bracket. The bottom end of the sensor body is connected to the base through a spring. The spring is provided in the hollow part of the bracket. There is a free reciprocating stroke of more than 10 mm between the sensor body and the base.

4. A gas stove with anti-sticking and anti-overflow knob display according to claim 3, characterized in that: The stove head includes a supporting base plate, a cast iron bracket, a burner, a thermocouple, an ignition needle, an outer fire nozzle seat, and an inner fire nozzle seat. The supporting base plate is embedded in a mounting hole installed on the stove body panel. The retractable temperature sensor is fixedly installed in the middle of the supporting base plate. The thermocouple and the ignition needle are fixedly installed on both sides of the retractable temperature sensor. The outer fire nozzle seat is installed on the outside of the thermocouple. The outer fire nozzle seat is connected to the outer ring gas pipe through an air guide pipe. The inner fire nozzle seat is installed on the outside of the ignition needle. The inner fire nozzle seat is connected to the inner ring gas pipe through the air guide pipe. The burner is sleeved on the outside of the outer fire nozzle seat, the inner fire nozzle seat, the thermocouple, the ignition needle, and the retractable temperature sensor. The cast iron bracket cover is arranged on the outer periphery of the burner. The ignition needle and the thermocouple are both connected to the PCB circuit board through wires.

5. A gas stove with anti-sticking and anti-overflow knob display according to claim 4, characterized in that: The burner includes an inner ring fire cover, an outer ring fire cover, and a gas mixing chamber. The gas mixing chamber is placed on a supporting base plate. An outer ring base and an inner ring base are respectively arranged on the gas mixing chamber. A circle of annular air duct is provided in the outer ring base and the inner ring base. The outer ring fire cover and the inner ring fire cover are respectively clamped and installed on the outer ring base and the inner ring base. A circle of annular air duct and a plurality of flame holes connected to the annular air duct are provided in the inner ring fire cover and the outer ring fire cover. An inner ring air inlet and an outer ring air inlet are respectively provided on the side walls of the gas mixing chamber. The inner ring air inlet is aligned with the inner fire nozzle seat, and the outer ring air inlet is aligned with the outer fire nozzle seat. The inner ring air inlet is connected to the inner ring fire cover, and the outer ring air inlet is connected to the outer ring fire cover.

6. A gas stove with anti-sticking and anti-overflow knob display according to claim 5, characterized in that: The PCB circuit board is also provided with a voltage-stabilized power supply module, a power supply module, an electromagnetic valve drive module, a motor drive module, a fire control module, a temperature control module, an ignition module, a display drive module, and a communication module. The input end of the voltage-stabilized power supply module is connected to the 110V-250V AC power supply, and the output end of the voltage-stabilized power supply module is connected to the power supply module. The power supply module is connected to the MCU, the electromagnetic valve drive module, the ignition module, the display drive module, the motor drive module, the fire control module, the temperature control module, the communication module, the hollow encoder, the display screen, the retractable temperature sensor, and the thermocouple. The electromagnetic valve drive module, the motor drive module, the fire control module, the temperature control module, the ignition module, the display drive module, the communication module, and the thermocouple are all connected to the MCU. The electromagnetic valve is connected to the electromagnetic valve drive module, the hollow encoder and the retractable temperature sensor are connected to the temperature control module, the motor is connected to the motor drive module, the zero position sensor and the angle sensor are connected to the fire control module, the ignition pin and the push-type switch are connected to the ignition module, and the display screen is connected to the display drive module.

7. A gas stove with anti-sticking and anti-overflow knob display according to claim 6, characterized in that: The stove head adopts a full upper air inlet structure.

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