Cooker and method for preventing dry boiling of a cooker

Abstract

The application discloses a kind of stove and stove dry burning prevention control device and method.The stove dry burning prevention control device includes: detection module, for obtaining the material quality detection data, shape detection data and dynamic detection data of the measured utensil;Control module is connected with detection module and dry burning prevention module respectively, for according to material quality detection data, shape detection data and dynamic detection data identification cooking scene, and according to cooking scene adjustment dry burning prevention module's working state and protection temperature threshold value.The application adjusts dry burning protection temperature threshold value by identifying the material quality of utensil, improves the applicability of dry burning prevention module to different utensils, avoids dry burning prevention module false triggering;According to shape and dynamic identification cooking scene, the working state of dry burning prevention module is adjusted, both can avoid the utensil and dry burning prevention module knock from moving, and can also realize dry burning protection in continuous cooking process, reduce security risk.

Description

Technical Field

[0001] This invention relates to the field of gas stove technology, and in particular to a stove and a stove anti-dry-burning control device and method. Background Technology

[0002] To ensure the personal and property safety of users, more and more gas stoves are equipped with anti-dry-burning function.

[0003] In existing technologies, anti-dry-burning gas stoves typically add a temperature sensing column in the center of the burner. This column senses the temperature of the pot bottom, and automatically cuts off the gas supply to the burner when the pot bottom temperature is too high. However, existing temperature protection strategies have the following problems: Different types of cookware are used during cooking, such as non-metallic cookware, aluminum pots, flat-bottomed pans, or round-bottomed pans. For non-metallic cookware, during timed operation, the temperature sensor may detect a higher pot bottom temperature, easily causing the stove's high-temperature protection to shut off prematurely, affecting the user experience. For cookware such as aluminum pots, whose bottoms are prone to concave deformation, the sensor may not make proper contact, leading to false triggering of the anti-dry-burning protection. Furthermore, in scenarios such as stir-frying and tossing the pan, the temperature sensor may collide with and damage the pot bottom. Summary of the Invention

[0004] This invention provides a stove anti-dry-burning control device that can automatically identify the material, shape, and movement characteristics of the cookware, and adjust the configuration scheme of the anti-dry-burning module according to different cooking scenarios, thereby reducing misjudgments and improving the applicability of the anti-dry-burning module to different cookware.

[0005] According to one aspect of the present invention, a stove anti-dry-burning control device is provided. The stove includes a pot rack, a drip tray, a burner, and an anti-dry-burning module. The pot rack is used to support the pot to be tested. The control device includes:

[0006] The detection module is used to acquire material detection data, shape detection data, and dynamic detection data of the cookware to be tested;

[0007] The control module is connected to the detection module and the anti-dry-burning module respectively. It is used to identify the cooking scenario based on material detection data, shape detection data and dynamic detection data, and adjust the working status and protection temperature threshold of the anti-dry-burning module according to the cooking scenario.

[0008] Optionally, the cooktop anti-dry-burning control device also includes: a drive assembly for driving the anti-dry-burning module to move;

[0009] The control module is also configured to: determine whether the cookware under test has deformed based on material detection data and shape detection data; and when the cookware under test deforms, control the drive component to drive the anti-dry-burning module to move in the direction toward the cookware under test until the anti-dry-burning module comes into contact with the bottom of the cookware under test; and / or, when the cooking scenario is a tossing cooking scenario, control the drive component to drive the anti-dry-burning module to move in the direction away from the cookware under test.

[0010] Optionally, the driver components include:

[0011] The drive motor is connected to the control module and is used to receive drive control signals from the control module and perform forward or reverse rotation according to the drive control signals.

[0012] The transmission mechanism has a crank part and a connecting rod part. The crank part is connected to the drive motor. The first end of the connecting rod part is hinged to the crank part, and the second end of the connecting rod part is hinged to the anti-dry-burning module. The crank part rotates synchronously with the drive motor, and drives the anti-dry-burning module to move in the direction toward or away from the pot to be tested through the connecting rod part.

[0013] The control module is configured to: acquire the crank radius and connecting rod length of the transmission mechanism, determine the moving distance of the anti-dry burning module based on material detection data, shape detection data and dynamic detection data, determine the crank angle based on the moving distance, crank radius and connecting rod length, and send a drive control signal based on the crank angle.

[0014] Optionally, the drive assembly also includes a fixing part, which is hinged to the second end of the connecting rod part, and the outer periphery of the fixing part forms a nested gap with the side wall of the hollow part of the burner head to lock and fix the anti-dry burning module, so that the anti-dry burning module can move in the direction toward or away from the pot to be tested.

[0015] Optionally, the anti-dry-burning module includes: an anti-dry-burning probe and a support unit;

[0016] The anti-dry-burning probe is installed in the hollow part of the burner head;

[0017] The support part is locked and fixed to the fixing part.

[0018] Optionally, the detection module includes at least one ultrasonic sensor, which is evenly arranged within the inner circumferential range of the pot rack to identify the real-time distance between the bottom of the pot and the transmitting end of the ultrasonic sensor.

[0019] The control module is also configured to determine the movement and shape of the cookware based on the real-time distance collected by the ultrasonic sensor, and to determine the cooking scenario based on the movement and shape of the cookware.

[0020] Optionally, the detection module includes at least one of the following: an electrical detection unit, an optical detection unit, and a thermal conductivity detection unit;

[0021] The control module is also configured to: determine the resistance and capacitance values ​​of the cookware under test based on the material detection data collected by the electrical detection unit, and determine the cookware material based on the resistance and capacitance values; and / or,

[0022] The emissivity of the cookware under test is determined based on the material testing data collected by the optical detection unit, and the material of the cookware is determined based on the emissivity; and / or,

[0023] The thermal conductivity of the cookware to be tested is determined based on the material testing data collected by the thermal conductivity testing unit, and the material of the cookware is determined based on the thermal conductivity.

[0024] Optionally, the stove anti-dry-burning control device may also include: a timer module and / or an interactive module;

[0025] The timing module is used to configure the timing duration;

[0026] The interaction module is used to obtain the working mode of the stove and display the corresponding data according to the working mode.

[0027] The operating modes include at least one of the following: timed mode, probe lifting and display mode, and anti-dry burning trigger mode.

[0028] According to another aspect of the present invention, a method for controlling dry burning of a cooktop is provided. The cooktop includes a pot rack, a drip tray, a burner, and an anti-dry burning module. The pot rack is used to support the cooktop to be tested. The method comprises:

[0029] Obtain material testing data, shape testing data, and dynamic testing data of the cookware under test;

[0030] The cooking scenario is identified based on material detection data, shape detection data, and dynamic detection data, and the working status and protection temperature threshold of the anti-dry burning module are adjusted according to the cooking scenario.

[0031] According to another aspect of the present invention, a cooktop is provided, comprising: a cooktop anti-dry-burning control device according to any embodiment of the present invention.

[0032] This invention provides a cooktop anti-dry-burning control device. Through a detection module and a control module, it can identify the material, shape, and movement of the cookware. The device adjusts the anti-dry-burning protection temperature threshold according to the cookware material to prevent misjudgment by the anti-dry-burning module. Simultaneously, it identifies the cooking scenario based on the shape and movement, adjusting the working state of the anti-dry-burning module accordingly. This prevents collisions between moving cookware and the anti-dry-burning module while ensuring anti-dry-burning protection during continuous cooking. It solves the problem of existing anti-dry-burning modules being incompatible with different cookware, leading to false triggering of the anti-dry-burning protection or damage to the temperature sensing element. This improves the applicability of the anti-dry-burning module to different cookware and reduces safety hazards.

[0033] It should be understood that the description in this section is not intended to identify key or essential features of the embodiments of the present invention, nor is it intended to limit the scope of the invention. Other features of the invention will become readily apparent from the following description. Attached Figure Description

[0034] To more clearly illustrate the technical solutions in the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0035] Figure 1 This is a structural schematic diagram of a stove with an anti-dry-burning control device provided in an embodiment of the present invention;

[0036] Figure 2 This is an exploded view of a stove with an anti-dry-burning control device provided in an embodiment of the present invention;

[0037] Figure 3 This is a schematic diagram of the structure of a stove anti-dry-burning control device provided in an embodiment of the present invention;

[0038] Figure 4 This is a schematic diagram of another stove anti-dry-burning control device provided in an embodiment of the present invention;

[0039] Figure 5 This is a schematic diagram of the structure of a driving component provided in an embodiment of the present invention;

[0040] Figure 6 This is a perspective view of a driving component provided in an embodiment of the present invention;

[0041] Figure 7 This is an exploded view of the drive assembly and furnace head provided in an embodiment of the present invention;

[0042] Figure 8 This is a schematic diagram of the structure of the drive assembly and the furnace head installed together according to an embodiment of the present invention;

[0043] Figure 9 This is a schematic diagram of the structure of another stove anti-dry-burning control device provided in an embodiment of the present invention;

[0044] Figure 10 This is a flowchart of a stove anti-dry-burning control method provided in an embodiment of the present invention;

[0045] Figure 11 This is a flowchart of another stove anti-dry-burning control method provided in an embodiment of the present invention.

[0046] Figure label:

[0047] 1. Pot support; 2. Water tray; 3. Burner; 4. Stove head; 5. Chassis; 6. Drive motor; 7. Crankshaft; 8. Connecting rod; 9. Fixing part; 10. Hollow part of stove head; 11. Anti-dry burning module; 13. Panel; 14. Timer encoder; 15. Timer encoder knob; 16. Valve body; 17. Detection module; 18. Control module; 19. Timer module; 20. Interaction module; 21. Display panel; 22. Power module; 23. Flameout protection module; 24. Flame detection module; 111. Anti-dry burning probe; 112. Support part; 200. Drive assembly. Detailed Implementation

[0048] To enable those skilled in the art to better understand the present invention, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort should fall within the scope of protection of the present invention.

[0049] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this invention are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of the invention described herein can be implemented in orders other than those illustrated or described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion; for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.

[0050] This invention provides a stove anti-dry-burning device, applicable to gas stoves equipped with anti-dry-burning function, and compatible with different types of cookware. In this embodiment, cookware is classified by material, including but not limited to any of the following: non-metallic pots and metallic pots, wherein non-metallic pots include but are not limited to: earthenware pots, stone pots, ceramic pots, or glass pots; metallic pots include but are not limited to: aluminum pots, iron pots, or stainless steel pots; cookware is classified by shape, including but not limited to: flat-bottomed pots or round-bottomed pots; cookware is classified by function, including but not limited to: woks, steamers, or stew pots.

[0051] Figure 1 This is a structural schematic diagram of a stove with an anti-dry-burning control device provided in an embodiment of the present invention. Figure 2This is an exploded view of a stove with an anti-dry-burning control device provided in an embodiment of the present invention. (Combined with...) Figure 1 and Figure 2 As shown, the stove includes a pot rack 1, a drip tray 2, a burner 3, and an anti-dry-burning module 11. The pot rack 1 supports the pot under test. When the stove is in operation, the pot is placed on top of the pot rack 1, with the lower surface of the pot abutting against the upper surface of the pot rack 1, and the pot rack 1 supports the pot. The pot rack 1 is placed on top of the drip tray 2, and the drip tray 2 supports the pot rack 1. The upper part of the burner head 4, the lower part of the drip tray 2, and the panel 13 are fixedly connected by fasteners. The burner 3 is positioned between the drip tray 2 and the upper part of the burner head 4, and the lower part of the burner head 4 is fixedly connected to the base 5 by fasteners. The anti-dry-burning module 11 is located in the hollow part 10 between the burner 3 and the burner head.

[0052] Figure 3 This is a schematic diagram of the structure of a stove anti-dry-burning control device provided in an embodiment of the present invention. See also... Figure 3 As shown, the control device of this application includes a detection module 17 and a control module 18.

[0053] The detection module 17 is used to acquire material detection data, shape detection data, and dynamic detection data of the cookware under test. In this embodiment, the material detection data is the data fed back after performing material detection on the cookware under test; the shape detection data is the data fed back after performing shape detection on the cookware under test; and the dynamic detection data is the data fed back after detecting the action state of the cookware under test.

[0054] The control module 18, connected to the detection module 17 and the anti-dry-burn module 11 respectively, is used to identify the cooking scenario based on material detection data, shape detection data, and dynamic detection data, and adjust the working state and protection temperature threshold of the anti-dry-burn module 11 according to the cooking scenario. The working state includes, but is not limited to: turning off the anti-dry-burn module 11, and maintaining the anti-dry-burn module 11 to perform temperature measurement on the bottom of the pot under test. The protection temperature threshold is the temperature set based on the temperature measurement data of the anti-dry-burn module 11 to trigger the anti-dry-burn protection action (such as powering off). Optionally, the cooking scenario includes, but is not limited to, any of the following: metal pot cooking, non-metal pot cooking scenario, or wok tossing scenario.

[0055] Specifically, when the stove is working, the control module 18 can determine the material of the pot based on the material monitoring data. Since the bottom temperature of pots made of different materials varies during cooking, the control module 18 will adjust the anti-dry-burn protection temperature threshold according to the material of the pot. For example, if the material of the pot under test is detected to be non-metallic, the bottom temperature of the non-metallic pot will be higher during cooking due to its poor thermal conductivity, so the anti-dry-burn protection temperature threshold needs to be increased. On the other hand, the thermal conductivity of the metal pot is better, and the temperature difference between the bottom temperature of the metal pot and the temperature of the food in the pot is smaller during cooking. If the material of the pot under test is detected to be metal, the anti-dry-burn protection temperature threshold needs to be lowered to avoid misjudgment by the anti-dry-burn module 11. At the same time, the control module 18 determines the shape of the pot and whether the pot is moving based on shape monitoring data and dynamic detection data. If the cookware is in motion, the system determines that the user is moving the cookware, such as flipping or transferring it. In this case, the anti-dry-burning module 11 is deactivated to prevent the cookware from colliding with the anti-dry-burning module 11 and damaging it. If the control module 18 determines that the cookware is stationary, the anti-dry-burning module 11 will activate and press against the bottom of the cookware to detect the temperature of the bottom of the cookware and prevent dry burning.

[0056] The stove anti-dry-burning control device provided in this invention can adjust the anti-dry-burning protection temperature threshold according to the material of the cookware, avoiding misjudgment by the anti-dry-burning module; at the same time, it can adjust the working state of the anti-dry-burning module according to the shape and dynamic recognition of the cooking scene, which can not only prevent moving cookware from bumping into the anti-dry-burning module, but also realize anti-dry-burning protection during continuous cooking. It solves the problem that existing anti-dry-burning modules are difficult to be compatible with different cookware, which can easily lead to false triggering of anti-dry-burning protection or damage to the temperature measuring element due to collision. It improves the applicability of the anti-dry-burning module to different cookware and reduces safety hazards.

[0057] Figure 4 This is a schematic diagram of another stove anti-dry-burning control device provided in an embodiment of the present invention. See also... Figure 4As shown, the stove anti-dry-burning control device of this application further includes a drive assembly 200 for driving the anti-dry-burning module 11 to move; the control module 18 is further configured to: determine whether the pot under test has deformed based on material detection data and shape detection data, and when the pot under test deforms, control the drive assembly to drive the anti-dry-burning module 11 to move in the direction toward the pot under test until the anti-dry-burning module 11 contacts the bottom of the pot under test; and / or, when the cooking scenario is a tossing cooking scenario, control the drive assembly 200 to drive the anti-dry-burning module 11 to move in the direction away from the pot under test. In this embodiment, the drive assembly 200 is connected to the anti-dry-burning module 11 to drive the anti-dry-burning module 11 to move in the direction toward or away from the bottom surface of the pot under test. For example, when the drive assembly 200 drives the anti-dry-burning module 11 to move in the direction toward the bottom surface of the cookware to be tested, if the anti-dry-burning probe 111 of the anti-dry-burning module 11 comes into contact with the bottom surface of the cookware, the drive assembly 200 stops driving; when the drive assembly 200 drives the anti-dry-burning module 11 to move in the direction away from the bottom surface of the cookware to be tested, the drive assembly 200 may increase the distance between the anti-dry-burning probe 111 and the bottom surface of the cookware according to the calibration data, or drive the anti-dry-burning probe 111 to be hidden inside the burner 3.

[0058] Specifically, when the cookware is placed on the pot rack 1, the bottom height of different shaped cookware will vary. For example, the bottom of a flat-bottomed pan will be higher than that of a round-bottomed pan. Therefore, the control module 18 needs to determine the position of the bottom of the pot based on the shape detection data and adjust the position of the anti-dry-burning module 11 to measure the temperature of the bottom of the pot. In addition, some cookware materials are prone to deformation under continuous high temperatures, such as aluminum pots. Therefore, when the control module 18 determines that the cookware under test has deformed, the anti-dry-burning module 11 needs to contact the bottom of the cookware under test to detect whether the temperature of the bottom of the pot is too high.

[0059] For example, when the user is tossing the food, the position and angle of the pot are constantly changing, and the anti-dry-burning module 11 is likely to collide with the bottom of the pot. At the same time, since the user can directly observe the state of the pot when tossing the food, the anti-dry-burning module 11 does not need to be in working state. Therefore, the control drive component 200 drives the anti-dry-burning module to move in a direction away from the pot to be tested, so as to avoid the anti-dry-burning module 11 from colliding with the bottom of the pot and causing damage to the anti-dry-burning module 11 or the pot.

[0060] Figure 5 This is a schematic diagram of the structure of a driving component provided in an embodiment of the present invention. Figure 6 This is an exploded view of a driving component provided in an embodiment of the present invention. See also... Figure 5 and Figure 6As shown, the drive assembly 200 includes a drive motor 6 and a transmission mechanism. The drive motor 6 is connected to the control module 18 and is used to receive drive control signals issued by the control module 18 and perform forward or reverse rotation according to the drive control signals. The transmission mechanism has a crank part 7 and a connecting rod part 8. The crank part 7 is connected to the drive motor 6. The first end of the connecting rod part 8 is hinged to the crank part 7, and the second end of the connecting rod part 8 is hinged to the anti-dry-burning module 11. The crank part 7 rotates synchronously with the drive motor 6 and drives the anti-dry-burning module 11 to move in the direction toward or away from the pot to be tested via the connecting rod part 8. The control module 18 is configured to: acquire the crank radius and connecting rod length of the transmission mechanism, determine the moving distance of the anti-dry-burning module 11 according to material detection data, shape detection data and dynamic detection data, determine the crank angle according to the moving distance, crank radius and connecting rod length, and issue drive control signals according to the crank angle.

[0061] refer to Figure 5 and Figure 6 As shown, when the drive motor 6 rotates forward or reverse, it drives the crank part 7 and the connecting rod part 8 to move, thereby achieving displacement of the anti-dry-burning probe 11 in the direction toward or away from the cookware (e.g., vertical direction). The formula for calculating the displacement of the anti-dry-burning probe 11 is:

[0062] x=R(1-cosα)+Rλ(1-cos2α) / 4

[0063] Where x represents the displacement of the probe, R is the crank radius, α is the crank angle, and λ is the ratio of the crank radius R to the connecting rod length L (R / L). The crank radius is the distance from the connection point between the crank part 7 and the drive motor 6 to the connection point between the crank part 7 and the connecting rod part 8. The control module 18 can determine the distance that the anti-dry-burning module 11 needs to move based on material detection data, shape detection data, and dynamic detection data, and control the drive motor 6 according to the above formula to move the anti-dry-burning module 11 to a specific position.

[0064] Optionally, the drive assembly 200 further includes a fixing part 9, which is hinged to the second end of the connecting rod part 8. The outer periphery of the fixing part 9 forms a nested gap fit with the side wall of the hollow part 10 of the burner head 3, for locking and fixing the anti-dry-burning module 11, so that the anti-dry-burning module 11 can move in a direction toward or away from the pot to be tested. In this embodiment, the fixing part 9 consists of two oppositely arranged cover plates, and the anti-dry-burning module 11 is fixed in the fixing hole formed by the engagement of the two cover plates.

[0065] Figure 7 This is an exploded view of the drive assembly and furnace head provided in an embodiment of the present invention. Figure 8 This is a schematic diagram illustrating the structural arrangement of the drive assembly and the furnace head provided in an embodiment of the present invention. (Combined with...) Figures 5 to 8As shown, the fixing part 9 is hinged to the second end of the connecting rod part 8 and locked to fix the anti-dry-burning module 11, so that the anti-dry-burning module 11 can be moved upward or downward by the connecting rod part 8. The fixing part 9 includes a fixing hole and several fixing feet. The fixing hole is used to fix the anti-dry-burning module 11. The fixing feet are arranged radially on the outside of the fixing hole and form a nested gap fit with the side wall of the hollow part 10 of the burner head, thereby ensuring that the anti-dry-burning module 11 will not shift horizontally while moving up and down.

[0066] See Figures 5 to 8 As shown, the anti-dry-burning module 11 includes an anti-dry-burning probe 111 and a support part 112; the anti-dry-burning probe 111 is disposed in the hollow part 10 of the burner head of the burner 3; the support part 112 is locked and fixed to the fixing part 9. The anti-dry-burning probe 111 can be equipped with a temperature sensor and / or a thermistor, and the bottom temperature of the pot under test is detected by the contact between the anti-dry-burning probe 111 and the bottom surface of the pot.

[0067] Combination Figures 5 to 8 As shown, the support part 112 is locked and fixed to the fixing part 9, so that the anti-dry burning probe 111 is placed in the hollow part 10 of the burner head. Specifically, the fixing part 9 includes a fixing hole, the size of which is interference-fitted with the support part 112, so that the support part 112 is locked and fixed in the fixing part 9.

[0068] Figure 9 This is a schematic diagram of another stove anti-dry-burning control device provided in an embodiment of the present invention, wherein the power module 22 supplies power to the control module 18 and the drive motor 6, and the control module 18 is connected to the detection module 17. The control module 18 receives data from the detection module 17, determines the movement and shape of the pot, and determines the cooking scenario based on the movement and shape of the pot.

[0069] Optionally, the detection module 17 includes a motion shape detection unit for collecting dynamic detection data and shape detection data of the cookware under test. Optionally, the motion shape detection unit includes at least one ultrasonic sensor. When the number of ultrasonic sensors is greater than or equal to two, multiple ultrasonic sensors are evenly arranged within the inner circumferential range of the pot rack 1 to identify the real-time distance between the bottom of the cookware and the transmitting end of the ultrasonic sensor. Preferably, three or four ultrasonic sensors can be set. Multiple ultrasonic sensors are evenly arranged on the surface of the drip tray 2 facing the cookware under test, and the projection of the ultrasonic sensors on the panel 13 falls within the inner circumferential range of the pot rack. The control module 18 is also configured to: determine the cookware motion and shape based on the real-time distance collected by at least one ultrasonic sensor, and determine the cooking scenario based on the cookware motion and shape. Specifically, during the detection process, the ultrasonic sensor emits ultrasonic waves, identifies the real-time distance from the bottom surface of the cookware supported by the pot rack, and identifies the cookware motion and shape based on the distance and changes at various points in space. For example, if the real-time distance between the bottom of the cookware and the ultrasonic sensor changes continuously, it is determined that the cookware is moving; if the real-time distance between the bottom of the cookware and the ultrasonic sensor does not change for a long time (e.g., within 2 seconds), it is determined that the cookware is stationary.

[0070] Optionally, the detection module 17 further includes a material detection unit, which is used to acquire material detection data of the cookware to be tested. The material detection unit includes at least one of the following: an electrical detection unit, an optical detection unit, and a thermal conductivity detection unit.

[0071] The electrical detection unit is used to detect the conductivity characteristics of the cookware under test. Typically, the electrical detection unit includes, but is not limited to, a capacitance sensor, a resistance sensor, or a magnetoelectric sensor. For example, taking a capacitance sensor as an example, the capacitance sensor is disposed at the probe head of the anti-dry-burning module 11. The capacitance sensor and the bottom surface of the cookware under test can form a capacitor plate. The capacitance calculation formula is C = εS / (4πkd), where ε represents the dielectric constant (for a parallel plate capacitor, ε is the dielectric constant between the capacitance sensor and the bottom surface of the cookware under test), S represents the area of ​​the capacitor plate, d represents the distance from the capacitor plate (i.e., the bottom surface of the cookware), and k represents the electrostatic constant. The control module 18 of this application is also configured to: determine the resistance and capacitance values ​​of the cookware under test based on the material detection data collected by the electrical detection unit, and determine the cookware material based on the resistance and capacitance values. Specifically, the presence or absence of capacitance can be used to determine whether a cookware is made of metal (capacitance detected) or non-metallic material (capacitance not detected). Furthermore, the specific metal material (such as aluminum alloy or iron alloy) can be determined by the magnitude of the detected capacitance value.

[0072] An optical detection unit is used to detect the emissivity of the cookware under test for a specific light wave. Typically, the optical detection unit includes, but is not limited to, a radiometer or an infrared radiation detection unit. For example, taking an infrared radiation detection unit as an example, the infrared radiation detection module is positioned on the outer periphery of the pot rack 1, abutting against the upper surface of the drip tray 2 or the panel 13, and detects the emissivity of the bottom surface of the pot. The control module 18 is also configured to: determine the emissivity of the cookware under test based on the material detection data collected by the optical detection unit, and determine the material of the cookware based on the emissivity. Specifically, the optical detection module can be positioned on the outer periphery of the pot rack 1, abutting against the upper surface of the drip tray 2 or the panel 13, and the material of the cookware can be determined by receiving and analyzing the magnitude of the emissivity of the bottom surface of the pot. For example, when the emissivity of the bottom surface of the cookware under test is less than the emissivity threshold (e.g., 0.6), the cookware under test is determined to be a non-metallic pot; when the emissivity of the bottom surface of the cookware under test is greater than or equal to the emissivity threshold (e.g., 0.6), the cookware under test is determined to be a metallic pot.

[0073] The thermal conductivity detection unit is used to detect the temperature change of the bottom of the cookware. Typically, the thermal conductivity detection unit includes, but is not limited to, a temperature sensor, a thermocouple sensor, or a thermistor sensor. For example, taking a temperature sensor as an example, the temperature sensor is positioned on the outer periphery of the pot rack 1, abutting against the water tray 2 or the upper surface of the panel 13, to detect the temperature change of the bottom of the pot. The control module 18 is also configured to: determine the thermal conductivity of the cookware under test based on the material detection data collected by the thermal conductivity detection unit, and determine the material of the cookware based on the thermal conductivity. Specifically, the thermal conductivity detection unit measures the temperature change of the bottom of the cookware using a temperature probe, then analyzes the temperature change to determine the thermal conductivity of the cookware, thereby determining the material of the cookware. For example, when the thermal conductivity is less than a critical value, the cookware under test is determined to be a non-metallic cookware; when the thermal conductivity is greater than or equal to the critical value, the cookware under test is determined to be a metallic cookware.

[0074] refer to Figure 9 As shown, the stove anti-dry-burning control device further includes: a timer module 19 and / or an interaction module 20; the timer module 19 is used to configure the timer duration, wherein the timer duration represents the cooking time of the stove; the interaction module 20 is used to obtain the working mode of the stove and display the corresponding data according to the working module; wherein the working mode includes at least one of the following: timer mode, probe lifting and display mode, and anti-dry-burning trigger mode.

[0075] refer to Figure 9 The control module 18 is connected to the timing module 19 and the interaction module 20. The timing module 19 configures the timing duration, and the control module 18 obtains the timing duration and controls the stove to turn off according to the timing duration. The control module 18 outputs the stove's working mode information to the interaction module 20, and the interaction module 20 displays the stove's working mode according to the working mode information.

[0076] refer to Figure 2 The timing module 19 includes a timing encoder 14 and a timing encoder knob 15. The timing encoder 14 is sleeved on the valve body 16 and located below the panel 13, while the timing encoder knob 15 is sleeved on the upper part of the timing encoder 14 and located above the panel 13. The power knob is inserted into the top of the valve stem of the valve body 16 and is located above the timing encoder knob 15. Both the valve body 16 and the timing encoder 14 are connected to the control module 18. The interaction module 20 includes a display panel 21, which abuts against the panel 13 and is connected to the control module 18. The upper surface of the display panel 21 is provided with a display screen. The display screen on the display panel 21 can display different data according to different modes. In the timing mode, the display panel 21 is used to display the remaining time in minutes, and the remaining time is displayed in seconds within 1 minute. In the probe lifting display mode, the display panel 21 can be used to display the height of the anti-dry burning probe 11 relative to the reference point, as well as the reminder display of the highest and lowest positions. In the anti-dry burning trigger mode, the display panel 21 can be used to display anti-dry burning trigger warning information (such as graphic warnings or light warnings).

[0077] refer to Figure 9 As shown, the stove anti-dry-burning control device of this application further includes: a flameout protection module 23 and a flame detection module 24. The flameout protection module 23 and the flame detection module 24 are respectively connected to the control module 18. The flameout protection module 23 performs flameout protection on the stove under the control of the control module 18. The flame detection module is used to detect the flame detection data of the stove and send the flame detection data to the control module 18. The control module 18 can determine whether ignition is successful or whether flameout is successful based on the flame detection data.

[0078] Based on the same inventive concept, this invention provides a method for preventing dry burning in a cooktop, implemented using the aforementioned anti-dry burning control device. The cooktop of this application includes a pot rack 1, a drip tray 2, a burner 3, and an anti-dry burning module 11. The pot rack 1 supports the pot to be tested. Figure 10 This is a flowchart of a stove anti-dry-burning control method provided in an embodiment of the present invention, such as... Figure 10 As shown, the stove anti-dry-burning control method of this application includes:

[0079] S1. Obtain the material detection data, shape detection data, and dynamic detection data of the cookware to be tested.

[0080] In this embodiment, different types of sensors or other detection elements can be set at the bottom surface of the cookware facing the cookware to be tested to collect detection data at the corresponding location.

[0081] S2. Identify the cooking scenario based on material detection data, shape detection data, and dynamic detection data, and adjust the working status and protection temperature threshold of the anti-dry burning module according to the cooking scenario.

[0082] Optionally, the stove anti-dry-burning control method of the present invention further includes: determining whether the pot to be tested has deformed based on material detection data and shape detection data, and when the pot to be tested deforms, controlling the drive component to drive the anti-dry-burning module to move in the direction toward the pot to be tested until the anti-dry-burning module abuts against the bottom of the pot to be tested; and / or, when the cooking scenario is a tossing cooking scenario, controlling the drive component to drive the anti-dry-burning module to move in the direction away from the pot to be tested.

[0083] Specifically, if the cooking scenario is identified as a tossing cooking scenario, the drive component 200 is controlled to drive the anti-dry-burn module 11 to move in the direction away from the pot being tested. The drive component 200 can increase the distance between the anti-dry-burn probe 111 and the bottom surface of the pot according to the calibration data, or drive the anti-dry-burn probe 111 to hide inside the burner 3, and the display panel 21 shows that the anti-dry-burn probe has descended; if the pot being tested is identified as not moving, the drive component 200 drives the anti-dry-burn module 11 to move in the direction away from the bottom surface of the pot being tested. As the cookware moves in the direction of the anti-dry-burning module 11, the display panel 21 shows that the anti-dry-burning probe has risen. If the anti-dry-burning probe 111 of the anti-dry-burning module 11 comes into contact with the bottom of the cookware, the drive component 200 stops driving. Some cookware materials are prone to deformation under continuous high temperatures, such as aluminum cookware. If deformation of the cookware under test is detected, the drive component 200 is controlled to drive the anti-dry-burning module 11 to move in the direction towards the bottom of the cookware under test, so that the anti-dry-burning module 11 comes into contact with the bottom of the cookware under test to detect whether the bottom temperature of the cookware is too high. If the anti-dry-burning module 11 detects that the bottom temperature of the cookware is higher than the anti-dry-burning protection temperature threshold, the anti-dry-burning high temperature protection is triggered, the display panel 21 shows that the anti-dry-burning mode has been triggered, and the gas supply is cut off, and the stove is turned off. If the user rotates the timer encoder knob 15 to turn on the timer mode, the display panel 21 can also display the timer mode and the remaining timer time. If the anti-dry-burning high temperature protection is not triggered within the timer time, the gas supply is cut off at the end of the timer time, and the stove is turned off.

[0084] Optionally, the stove anti-dry-burning control method of the present invention further includes: determining the resistance and capacitance value of the cookware to be tested based on the material detection data collected by the electrical detection unit, and determining the cookware material based on the resistance and capacitance value; and / or determining the emissivity of the cookware to be tested based on the material detection data collected by the optical detection unit, and determining the cookware material based on the emissivity; and / or determining the thermal conductivity of the cookware to be tested based on the material detection data collected by the thermal conductivity detection unit, and determining the cookware material based on the thermal conductivity.

[0085] Optionally, the stove anti-dry-burning control method of the present invention further includes: acquiring the working mode of the stove and displaying corresponding data according to the working module; wherein the working mode includes at least one of the following: timed mode, probe lifting and display mode, and anti-dry-burning trigger mode.

[0086] Figure 11 This is a flowchart of another method for preventing dry burning in a stove, provided in an embodiment of the present invention. (Reference) Figure 11 The user rotates the fire control knob to ignite the stove. A thermocouple checks if ignition is successful, and the anti-dry-burn mode is activated by default upon successful ignition. Next, the heat conduction detection unit and ultrasonic sensor determine the material, shape, and movement of the cookware. If the cookware moves continuously, the anti-dry-burn probe 111 descends into the burner 3. If the cookware does not move continuously and is non-metallic, the anti-dry-burn protection temperature threshold is increased by Δt. If the cookware does not move continuously and is metallic, the drive motor 6 moves the anti-dry-burn probe 111 to contact the bottom of the cookware. For round-bottomed cookware, the anti-dry-burn probe 111 does not need to move; for flat-bottomed cookware, the probe 111 needs to rise to contact the bottom. If the anti-dry-burn high-temperature protection is triggered, the stove shuts off; if it is not triggered, the stove shuts off when the timer ends.

[0087] Based on the same inventive concept, embodiments of the present invention provide a stove, including: a stove anti-dry-burning control device according to any embodiment of the present invention.

[0088] It should be understood that the various forms of processes shown above can be used, with steps reordered, added, or deleted. For example, the steps described in this invention can be executed in parallel, sequentially, or in different orders, as long as the desired result of the technical solution of this invention can be achieved, and this is not limited herein.

[0089] The specific embodiments described above do not constitute a limitation on the scope of protection of this invention. Those skilled in the art should understand that various modifications, combinations, sub-combinations, and substitutions can be made according to design requirements and other factors. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this invention should be included within the scope of protection of this invention.

Claims

1. A stove anti-dry-burning control device, the stove comprising a pot rack, a drip tray, a burner, and an anti-dry-burning module, wherein the pot rack is used to support the pot to be tested, characterized in that, The control device includes: The detection module is used to acquire material detection data, shape detection data, and dynamic detection data of the cookware to be tested; The control module is connected to the detection module and the anti-dry-burning module respectively, and is used to identify the cooking scenario based on the material detection data, the shape detection data and the dynamic detection data, and adjust the working state and protection temperature threshold of the anti-dry-burning module according to the cooking scenario; A driving component is used to drive the anti-dry-burning module to move; The control module is further configured to: determine whether the cookware under test has deformed based on the material detection data and the shape detection data; and when the cookware under test deforms, control the drive component to drive the anti-dry-burning module to move in the direction toward the cookware under test until the anti-dry-burning module comes into contact with the bottom of the cookware under test; and, when the cooking scenario is a tossing cooking scenario, control the drive component to drive the anti-dry-burning module to move in the direction away from the cookware under test.

2. The stove anti-dry-burning control device according to claim 1, characterized in that, The driving component includes: A drive motor, connected to the control module, is used to receive drive control signals sent by the control module and to perform forward or reverse rotation according to the drive control signals; The transmission mechanism includes a crank portion and a connecting rod portion. The crank portion is connected to the drive motor. The first end of the connecting rod portion is hinged to the crank portion, and the second end of the connecting rod portion is hinged to the anti-dry-burning module. The crank portion rotates synchronously with the drive motor, and the connecting rod portion drives the anti-dry-burning module to move in a direction toward or away from the pot to be tested. The control module is configured to: acquire the crank radius and connecting rod length of the transmission mechanism; determine the moving distance of the anti-dry burning module based on the material detection data, the shape detection data, and the dynamic detection data; determine the crank angle based on the moving distance, the crank radius, and the connecting rod length; and send the drive control signal based on the crank angle.

3. The stove anti-dry-burning control device according to claim 2, characterized in that, The drive assembly also includes a fixing part, which is hinged to the second end of the connecting rod part, and the outer periphery of the fixing part forms a nested gap fit with the side wall of the hollow part of the burner head to lock and fix the anti-dry burning module, so that the anti-dry burning module can move in the direction toward or away from the pot to be tested.

4. The stove anti-dry-burning control device according to claim 3, characterized in that, The anti-dry-burning module includes: an anti-dry-burning probe and a support; The anti-dry-burning probe is installed in the hollow part of the burner head; The support portion is locked and fixed to the fixing portion.

5. The stove anti-dry-burning control device according to claim 1, characterized in that, The detection module includes at least one ultrasonic sensor, which is evenly arranged within the inner circumferential range of the pot rack to identify the real-time distance between the bottom of the pot and the transmitting end of the ultrasonic sensor. The control module is also configured to: determine the pot's movement and shape based on the real-time distance acquired by the ultrasonic sensor, and determine the cooking scenario based on the pot's movement and shape.

6. The stove anti-dry-burning control device according to claim 1, characterized in that, The detection module includes at least one of the following: an electrical detection unit, an optical detection unit, and a thermal conductivity detection unit; The control module is further configured to: determine the resistance and capacitance values ​​of the cookware under test based on the material detection data collected by the electrical detection unit, and determine the cookware material based on the resistance and capacitance values; and / or, The emissivity of the cookware under test is determined based on the material detection data collected by the optical detection unit, and the material of the cookware is determined based on the emissivity. And / or, The thermal conductivity of the cookware to be tested is determined based on the material detection data collected by the thermal conductivity detection unit, and the material of the cookware is determined based on the thermal conductivity.

7. The stove anti-dry-burning control device according to any one of claims 1-6, characterized in that, Also includes: Timed module and / or interactive module; The timing module is used to configure the timing duration; The interaction module is used to obtain the working mode of the stove and display the corresponding data according to the working mode; The operating modes include at least one of the following: timed mode, probe lifting and display mode, and anti-dry burning trigger mode.

8. A method for controlling dry burning in a cooktop, the cooktop comprising a pot rack, a drip tray, a burner, a drive assembly, and an anti-dry burning module, wherein the pot rack is used to support the pot to be tested, characterized in that... The control method includes: Acquire the material detection data, shape detection data, and dynamic detection data of the cookware under test; The cooking scenario is identified based on the material detection data, the shape detection data, and the dynamic detection data, and the working state and protection temperature threshold of the anti-dry burning module are adjusted according to the cooking scenario. Specifically, based on the material detection data and the shape detection data, it is determined whether the cookware under test has deformed. When the cookware under test deforms, the drive component is controlled to drive the anti-dry-burning module to move in the direction toward the cookware under test until the anti-dry-burning module comes into contact with the bottom of the cookware under test. And, when the cooking scenario is a tossing cooking scenario, the drive component is controlled to drive the anti-dry-burning module to move in the direction away from the cookware under test.

9. A stove, characterized in that, include: The stove anti-dry-burning control device according to any one of claims 1 to 7.

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