Stove and stove anti-dry-burning control device and method

Abstract

The invention discloses a stove and a stove anti-dry burning control device and method. The anti-dry burning control device for the cooker comprises a detection module used for obtaining material detection data and dynamic detection data of a to-be-detected cooker; and the control module is connected with the detection module and the anti-dry-burning module and is used for identifying a cooking scene according to the material detection data and the dynamic detection data and adjusting the working state and the protection temperature threshold value of the anti-dry-burning module according to the cooking scene. The anti-dry-burning protection temperature threshold value is adjusted by recognizing the material of the cookware, the applicability of the anti-dry-burning module to different cookware is improved, and false triggering of the anti-dry-burning module is avoided; meanwhile, according to the dynamically recognized cooking scene, the working state of the anti-dry-burning module is correspondingly adjusted, so that collision between the moving cookware and the anti-dry-burning module can be avoided, anti-dry-burning protection in the continuous cooking process can be achieved, and potential safety hazards are reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of gas stove control, and in particular to a stove and a stove dry-burning prevention control device and method. Background Art

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

[0003] In the prior art, a dry-burn prevention gas stove usually adds a temperature-sensing column in the middle of the burner, which senses the temperature of the pot bottom through the temperature-sensing column. When the temperature of the pot bottom is too high, the gas supply to the burner is automatically cut off. The existing temperature measurement protection strategy has the following problems: the types of pots used by users during cooking are different, such as non-metallic pots or aluminum pots. For non-metallic pots, during the timing operation, the temperature of the pot bottom detected by the temperature control probe is too high, which can easily cause the stove high-temperature protection to shut down in the middle, affecting the user experience; for pots such as aluminum pots whose bottoms are prone to concave deformation, it is easy for the top of the probe to not be in place, causing the dry-burn prevention to be falsely triggered; in scenes such as frying and flipping the pot, the temperature measurement probe and the bottom of the pot are prone to collision and damage. Summary of the invention

[0004] The present invention provides a stove anti-dry-burning control device, which can automatically identify characteristic parameters such as the material and action of the cookware, adjust the configuration scheme of the anti-dry-burning module according to different cooking scenes, reduce misjudgment, and improve the applicability of the anti-dry-burning module to different cookware.

[0005] According to one aspect of the present invention, a cooker anti-dry-burning control device is provided, the cooker comprises a pot rack, a water receiving tray, a burner and an anti-dry-burning module, the pot rack is used to support the pot to be tested, and the control device comprises:

[0006] A detection module is used to obtain material 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, and is used to identify the cooking scene according to the material 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 scene.

[0008] Optionally, the stove anti-dry-burning control device further includes: a driving component, used for driving the anti-dry-burning module to move;

[0009] The control module is also configured to: determine whether the cookware to be tested is a deformable cookware based on the material detection data, and when the cookware to be tested is a deformable cookware, control the drive component to drive the anti-dry-burning module to move in a direction toward the cookware to be tested until the anti-dry-burning module abuts against the bottom of the cookware to be tested; and / or, when the cookware type is a non-deformable cookware, control the drive component to drive the anti-dry-burning module to move in a direction away from the cookware to be tested according to the cooking scene.

[0010] Optionally, the drive components include:

[0011] The drive motor is connected to the control module and is used to receive the drive control signal sent by the control module and perform forward or reverse rotation according to the drive control signal;

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

[0013] The control module is configured to: obtain the crank radius and connecting rod length of the transmission mechanism, determine the moving distance of the anti-dry-burning module according to the material detection data and the dynamic detection data, determine the crank angle according to the moving distance, the crank radius and the connecting rod length, and send a driving control signal according to the crank angle. Optionally, the driving assembly also includes a fixing portion, the fixing portion is hinged to the second end of the connecting rod portion, and the outer periphery of the fixing portion and the side wall of the hollow portion of the burner head of the burner form a nested clearance fit and abutment, which is used to lock and fix the anti-dry-burning module, so that the anti-dry-burning module can move in a direction toward or away from the pot to be tested.

[0014] Optionally, the anti-dry-burning module includes: an anti-dry-burning probe and a support portion;

[0015] The anti-dry burning probe is arranged in the hollow part of the burner head of the burner;

[0016] The supporting part is locked and fixed to the fixing part.

[0017] 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;

[0018] The control module is further configured to: determine the resistance and capacitance values ​​of the cookware to be tested according to the material detection data collected by the electrical detection unit, and determine the material of the cookware according to the resistance and capacitance values; and / or,

[0019] Determine the emissivity of the cookware to be tested according to the material detection data collected by the optical detection unit, and determine the material of the cookware according to the emissivity; and / or,

[0020] 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.

[0021] Optionally, the detection module is configured to: identify at least one of the real-time distance from the bottom surface of the pot, the pressure borne by the pot rack, and the acceleration of the pot;

[0022] The control module is further configured to determine the pot movement and the pot shape according to at least one of the real-time distance from the bottom surface of the pot, the pressure borne by the pot rack, or the acceleration of the pot.

[0023] Optionally, the stove anti-dry-burning control device further includes: a timing module and / or an interaction module;

[0024] The timing module is used to configure the timing duration;

[0025] The interactive module is used to obtain the working mode of the cooker and display the corresponding data according to the working module;

[0026] Among them, the working mode includes at least one of the following: timing mode, probe lifting and display mode and anti-dry burning trigger mode.

[0027] According to another aspect of the present invention, a method for controlling a stove to prevent dry burning is provided. The stove comprises a pot rack, a water receiving tray, a burner and an anti-dry burning module. The pot rack is used to support the pot to be tested. The control method comprises:

[0028] Obtain material detection data and dynamic detection data of the cookware to be tested;

[0029] The cooking scene is identified based on the material detection data and the dynamic detection data, and the working state and the protection temperature threshold of the anti-dry burning module are adjusted according to the cooking scene.

[0030] According to another aspect of the present invention, a stove is provided, comprising: the stove anti-dry-burning control device in any embodiment of the present invention.

[0031] An anti-dry-burn control device for a stove provided in an embodiment of the present invention can identify the material and dynamics of the cookware through a detection module and a control module, and adjust the anti-dry-burn protection temperature threshold according to the material of the cookware, thereby avoiding misjudgment of the anti-dry-burn module; at the same time, according to the dynamic identification of the cooking scene, the working state of the anti-dry-burn module is adjusted accordingly, which can not only avoid the collision between the moving cookware and the anti-dry-burn module, but also realize the anti-dry-burn protection during continuous cooking, thereby solving the problem that the existing anti-dry-burn module is prone to false triggering of the anti-dry-burn protection or collision damage of the temperature measuring element, thereby reducing safety hazards.

[0032] It should be understood that the contents described in this section are not intended to identify the key or important features of the embodiments of the present invention, nor are they intended to limit the scope of the present invention. Other features of the present invention will become easily understood through the following description. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0034] Figure 1 is a structural schematic diagram of a stove with an anti-dry-burning control device provided by an embodiment of the present invention;

[0035] Figure 2 is an exploded diagram of a cooker with an anti-dry-burning control device provided by an embodiment of the present invention;

[0036] Figure 3 It is a structural schematic diagram of a stove anti-dry-burning control device provided by an embodiment of the present invention;

[0037] Figure 4 is a structural schematic diagram of another stove anti-dry-burning control device provided by an embodiment of the present invention;

[0038] Figure 5 is a structural schematic diagram of a driving component provided by an embodiment of the present invention;

[0039] Figure 6 is a stereoscopic diagram of a driving assembly provided by an embodiment of the present invention;

[0040] Figure 7 is an exploded view of a drive assembly and a furnace head provided in an embodiment of the present invention;

[0041] Figure 8 It is a schematic diagram of the structure of the drive assembly and the furnace head provided by the embodiment of the present invention;

[0042] Fig. 9 is a structural schematic diagram of another stove anti-dry-burning control device provided by an embodiment of the present invention;

[0043] Fig.10 is a flow chart of a method for controlling a stove to prevent dry burning provided by an embodiment of the present invention;

[0044] Fig.11 It is a flow chart of another stove anti-dry-burning control method provided by an embodiment of the present invention.

[0045] Reference numerals:

[0046] 1. Pot stand; 2. Water tray; 3. Burner; 4. Burner head; 5. Chassis; 6. Drive motor; 7. Crankshaft; 8. Connecting rod; 9. Fixing part; 10. Hollow part of burner head; 11. Anti-dry burning module; 13. Panel; 14. Encoder; 15. Timing encoder knob; 16. Valve body; 17. Detection module; 18. Control module; 19. Timing module; 20. Interaction module; 21. Display panel; 22. Power module; 23. Flameout protection module; 24. Fire detection module; 111. Anti-dry burning probe; 112. Support part; 200. Drive assembly. DETAILED DESCRIPTION

[0047] In order to enable those skilled in the art to better understand the scheme of the present invention, the technical scheme in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present invention.

[0048] It should be noted that the terms "first", "second", etc. in the specification and claims of the present invention and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the data used in this way can be interchanged where appropriate, so that the embodiments of the present invention described herein can be implemented in an order other than those illustrated or described herein. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions, for example, a process, method, system, product or device that includes a series of steps or units is not necessarily limited to those steps or units that are clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0049] The embodiment of the present invention provides a stove anti-dry-burning device, which is suitable for gas stoves equipped with an anti-dry-burning function and can be compatible with different types of pots. In this embodiment, the pots are classified by material, including but not limited to any of the following: non-metallic pots and metal pots, wherein the non-metallic pots include but are not limited to: casserole, stone pot, ceramic pot or glass pot; metal pots include but are not limited to: aluminum pot, iron pot or stainless steel pot; classified by function, the pots include but are not limited to: frying pan, steaming pot or stew pot.

[0050] Figure 1 is a structural schematic diagram of a stove with an anti-dry-burning control device provided by an embodiment of the present invention, Figure 2 FIG. 1 is an exploded view of a stove with an anti-dry burning control device provided by an embodiment of the present invention. Figure 1 and Figure 2As shown, the stove includes a pot rack 1, a water tray 2, a burner 3 and an anti-dry-burning module 11, and the pot rack 1 is used to support the pot to be tested. When the stove is working, the pot is placed on the pot rack 1, the lower surface of the pot is in contact with the upper surface of the pot rack 1, and the pot rack 1 supports the pot. The pot rack 1 is placed on the water tray 2, and the water tray 2 supports the pot rack 1. The upper part of the burner 4, the lower part of the water tray 2, and the panel 13 are fixedly connected by fasteners. The burner 3 is arranged between the water tray 2 and the upper part of the burner 4, and the lower part of the burner 4 is fixedly connected to the chassis 5 by fasteners. The anti-dry-burning module 11 is located between the burner 3 and the hollow part 10 of the burner.

[0051] Figure 3 is a schematic diagram of a stove dry-burning prevention control device provided by an embodiment of the present invention, see Figure 3 As shown, the control device of the present application includes: a detection module 17 and a control module 18 .

[0052] The detection module 17 is used to obtain material detection data and dynamic detection data of the cookware to be tested. In this embodiment, the material detection data is the data fed back after the material detection is performed on the cookware to be tested; the dynamic detection data is the data fed back after the action state detection is performed on the cookware to be tested.

[0053] The control module 18 is connected to the detection module 17 and the anti-dry-burning module 11, respectively, and is used to identify the cooking scene according to the material detection data and the dynamic detection data, and adjust the working state and protection temperature threshold of the anti-dry-burning module 11 according to the cooking scene. Among them, the working state includes but is not limited to: turning off the anti-dry-burning module 11, and maintaining the anti-dry-burning module 11 to perform temperature measurement on the bottom of the pot to be tested. The protection temperature threshold is the temperature that triggers the anti-dry-burning protection action (such as shutting down) based on the temperature measurement data of the anti-dry-burning module 11. Optionally, the cooking scene includes but is not limited to any of the following: metal pot cooking, non-metal pot cooking scene or pot flipping scene.

[0054] Specifically, when the cooker is working, the control module 18 can determine the material of the cooker based on the material monitoring data of the cooker. Since the bottom temperature of cookers of different materials is different during the cooking process, the control module 18 will adjust the anti-dry burning protection temperature threshold according to the material of the cooker. For example, if it is detected that the material of the cooker to be tested is non-metallic, the bottom temperature of the non-metallic cooker will be higher during the cooking process due to the poor thermal conductivity of the non-metallic cooker, so the anti-dry burning protection temperature threshold needs to be increased; while the thermal conductivity of metal cookers is better, and the difference between the bottom temperature of metal cookers and the temperature of the food in the cooker during the cooking process is small. If it is detected that the material of the cooker to be tested is metal, the anti-dry burning protection temperature threshold needs to be lowered to avoid the occurrence of misjudgment by the anti-dry burning module 11. At the same time, the control module 18 determines whether the cooker is moving based on the dynamic detection number. If the cookware is moving, it is determined that the user is moving the cookware, such as the user is shaking the cookware or transferring the cookware, and the anti-dry-burning module 11 is turned off to prevent the cookware from colliding with the anti-dry-burning module 11 and damaging the cookware or the anti-dry-burning module 11. If the control module 18 determines that the cookware is stationary, the anti-dry-burning module 11 is turned on and abuts against the bottom of the cookware to detect the temperature of the bottom of the cookware to prevent dry-burning.

[0055] An anti-dry-burn control device for a stove provided in an embodiment of the present invention can adjust the anti-dry-burn protection temperature threshold according to the material of the cookware, thereby avoiding the occurrence of misjudgment of the anti-dry-burn module; at the same time, according to the dynamic identification of the cooking scene, the working state of the anti-dry-burn module is adjusted accordingly, which can not only avoid the collision between the moving cookware and the anti-dry-burn module, but also realize the anti-dry-burn protection during continuous cooking, thereby solving the problem that the existing anti-dry-burn module is prone to false triggering of the anti-dry-burn protection or collision damage of the temperature measuring element, thereby reducing safety hazards.

[0056] Figure 4 is a schematic diagram of the structure of another stove anti-dry burning control device provided by an embodiment of the present invention, see Figure 4As shown, the stove anti-dry-burning control device of the present application also includes a driving component 200, which is used to drive the anti-dry-burning module 11 to move; the control module 18 is also configured to: determine whether the pot to be tested is an easily deformable pot according to the material detection data, and when the pot to be tested is an easily deformable pot, control the driving component 200 to drive the anti-dry-burning module 11 to move in the direction toward the pot to be tested until the anti-dry-burning module 11 abuts against the bottom of the pot to be tested; and / or, when the pot type is a non-deformable pot, control the driving component 200 to drive the anti-dry-burning module 11 to move in the direction away from the pot to be tested according to the cooking scene. In this embodiment, the driving component 200 is connected to the anti-dry-burning module 11 in a transmission connection to drive the anti-dry-burning module 11 to move in the direction toward or away from the bottom surface of the pot to be tested. Exemplarily, when the driving component 200 drives the anti-dry-burning module 11 to move in a 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 abuts against the bottom surface of the cookware, the driving component 200 stops driving; when the driving component 200 drives the anti-dry-burning module 11 to move in a direction away from the bottom surface of the cookware to be tested, the driving component 200 can 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 hide inside the burner 3.

[0057] Specifically, some pots made of certain materials are prone to deformation when subjected to continuous high temperatures, such as aluminum pots. When the control module 18 determines that the pot to be tested is prone to deformation, the anti-dry-burning module 11 needs to contact the bottom of the pot to be tested to detect whether the temperature of the bottom of the pot is too high to prevent the pot from deforming. Non-deformable pots are not easily deformed by high temperatures. When the pot type is a non-deformable pot, the drive assembly 200 drives the anti-dry-burning module 11 to move in a direction away from the bottom of the pot to be tested to avoid collision between the anti-dry-burning module 11 and the pot, resulting in damage to the anti-dry-burning module 11 or the pot.

[0058] Figure 5 is a schematic diagram of the structure of a driving component provided by an embodiment of the present invention, Figure 6 is an exploded view of a drive assembly provided by an embodiment of the present invention. 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 the drive control signal issued by the control module 18, and execute forward or reverse rotation according to the drive control signal; the transmission mechanism is provided with a crank portion 7 and a connecting rod portion 8, the crank portion 7 is connected to the drive motor 6, the first end of the connecting rod portion 8 is hinged to the crank portion 7, and the second end of the connecting rod portion 8 is hinged to the anti-dry-burning module 11, the crank portion 7 rotates synchronously with the drive motor 6, and drives the anti-dry-burning module 11 to move in a direction toward or away from the pot to be tested through the connecting rod portion 8; the control module 18 is configured to: obtain the crank radius and the connecting rod length of the transmission mechanism, determine the moving distance of the anti-dry-burning module 11 according to the material detection data and the dynamic detection data, and determine the crank angle according to the moving distance, the crank radius and the connecting rod length, and issue a drive control signal according to the crank angle.

[0059] refer to Figure 5 and Figure 6 As shown, when the drive motor 6 rotates forward or reversely, the drive motor 6 drives the crank portion 7 and the connecting rod portion 8 to move, thereby achieving the displacement of the anti-dry-boiling probe 11 in a direction toward or away from the cookware (for example, in a vertical direction). The calculation formula for the displacement of the anti-dry-boiling probe 11 is:

[0060] x=R(1-cosα)+Rλ(1-cos2α) / 4

[0061] Wherein, 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 between the connection point of the crank portion 7 and the drive motor 6 and the connection point of the crank portion 7 and the connecting rod portion 8. The control module 18 can determine the distance that the anti-dry burning module 11 needs to move according to the material detection data and the 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.

[0062] Optionally, the drive assembly 200 further includes a fixing portion 9, which is hinged to the second end of the connecting rod portion 8, and the outer periphery of the fixing portion 9 forms a nested clearance fit with the side wall of the hollow portion 10 of the burner head of the burner 3, which is used to lock and fix 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 portion 9 is two cover plates arranged opposite to each other, and the anti-dry-burning module 11 is fixed in a fixing hole formed by the two cover plates.

[0063] Figure 7 is an exploded view of a drive assembly and a furnace head provided in an embodiment of the present invention, Figure 8 Schematic diagram of the structure of the drive assembly and the furnace head provided by the embodiment of the present invention. Figures 5 to 8As shown, the fixing portion 9 is hinged to the second end of the connecting rod portion 8, and is locked to fix the anti-dry burning module 11, so that the anti-dry burning module 11 can be driven by the connecting rod portion 8 to move upward or downward. The fixing portion 9 includes a fixing hole and a plurality of fixing feet. The fixing hole is used to fix the anti-dry burning module 11. The fixing feet are radially arranged outside the fixing hole and form a nested clearance fit with the side wall of the hollow portion 10 of the burner head, thereby ensuring that the anti-dry burning module 11 will not deviate in the horizontal direction while moving up and down.

[0064] See also Figures 5 to 8 As shown, the anti-dry-burning module 11 includes an anti-dry-burning probe 111 and a support portion 112; the anti-dry-burning probe 111 is arranged in the hollow portion 10 of the burner head of the burner 3; and the support portion 112 is locked and fixed to the fixing portion 9. The anti-dry-burning probe 111 can be provided with a temperature sensor and / or a thermistor, and the bottom temperature of the pot to be tested is detected by contact between the anti-dry-burning probe 111 and the bottom surface of the pot.

[0065] 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. Specifically, the fixing part 9 includes a fixing hole, the size of which is interference fit with the support part 112, so that the support part 112 is locked and fixed in the fixing part 9.

[0066] Fig. 9 2 is a schematic diagram of the structure of another stove anti-dry-burning control device provided by 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 action of the cooker, and determines the cooking scene according to the action of the cooker.

[0067] Optionally, the detection module 17 further includes a material detection unit, which is used to obtain 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.

[0068] Among them, the electrical detection unit is used to detect the conductive properties of the pot to be tested. Typically, the electrical detection unit includes but is not limited to: a capacitive sensor, a resistive sensor or a magnetoelectric sensor. Exemplarily, taking a capacitive sensor as an example, the capacitive sensor is arranged at the probe head of the anti-dry-burning module 11, and the capacitive sensor and the bottom surface of the pot to be tested can form a capacitor plate. The capacitance calculation formula is C=εS / (4πkd), wherein ε represents the dielectric constant (for a parallel plate capacitor, ε is the dielectric constant between the capacitive sensor and the bottom surface of the pot to be tested), S represents the area facing the capacitor plate, d represents the distance from the capacitor plate (i.e., the bottom surface of the pot), and k represents the electrostatic force constant. The control module 18 of the present application is also configured to: determine the resistance and capacitance values ​​of the pot to be tested according to the material detection data collected by the electrical detection unit, and determine the material of the pot according to the resistance and capacitance values. Specifically, the presence or absence of capacitance can be used to determine whether the cookware is made of metal (capacitor detected) or non-metallic material (capacitor not detected). Furthermore, the specific metal material (such as aluminum alloy or iron alloy) can be determined by the capacitance value obtained by detection.

[0069] The optical detection unit is used to detect the radiation coefficient of the pot to be tested to a specific light wave. Typically, the optical detection unit includes but is not limited to: a radiometer or an infrared radiation detection unit. Exemplarily, taking the infrared radiation detection unit as an example, the infrared radiation detection module is arranged in the outer peripheral direction of the pot rack 1, abutting against the water receiving tray 2 or the upper surface of the panel 13, and detecting the radiation coefficient of the bottom surface of the pot. The control module 18 is also configured to: determine the radiation coefficient of the pot to be tested according to the material detection data collected by the optical detection unit, and determine the material of the pot according to the radiation coefficient. Specifically, the optical detection module can be arranged in the outer peripheral direction of the pot rack 1, abutting against the water receiving tray 2 or the upper surface of the panel 13, and the material of the pot can be determined by receiving and analyzing the radiation coefficient of the bottom surface of the pot. For example, when the radiation coefficient of the bottom surface of the pot to be tested is less than the radiation coefficient critical value (for example, 0.6), the pot to be tested is determined to be a non-metallic pot; when the radiation coefficient of the bottom surface of the pot to be tested is greater than or equal to the radiation coefficient critical value (for example, 0.6), the pot to be tested is determined to be a metal pot.

[0070] The thermal conductivity detection unit is used to detect the temperature change of the bottom of the electric 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 the temperature sensor as an example, the temperature sensor is arranged in the outer peripheral direction of the pot rack 1, abutting against the water receiving tray 2 or the upper surface of the panel 13, and detecting the temperature change of the bottom of the pot. The control module 18 is also configured to: determine the thermal conductivity of the pot to be tested according to the material detection data collected by the thermal conductivity detection unit, and determine the material of the pot according to the thermal conductivity. Specifically, the thermal conductivity detection unit measures the change of the temperature at the bottom of the pot through a temperature probe, and then analyzes the change of the temperature at the bottom of the pot to determine the thermal conductivity of the pot, thereby determining the material of the pot. For example, when the thermal conductivity is less than the critical value of the thermal conductivity, the pot to be tested is determined to be a non-metallic pot; when the thermal conductivity is greater than or equal to the critical value of the thermal conductivity, the pot to be tested is determined to be a metal pot.

[0071] Optionally, the detection module 17 further includes a motion detection unit, which is used to obtain motion detection data of the pot to be tested. The motion detection unit is configured to: identify at least one of the real-time distance from the bottom of the pot, the pressure on the pot rack, and the acceleration of the pot;

[0072] The control module is further configured to determine the pot movement and the pot shape according to at least one of the real-time distance from the bottom surface of the pot, the pressure borne by the pot rack, or the acceleration of the pot.

[0073] Optionally, the motion detection unit includes an ultrasonic sensor, which is used to detect the real-time distance between the bottom of the pot and the transmitting end of the ultrasonic sensor. The ultrasonic sensors are evenly arranged within the axial range of the inner ring of the pot rack 1. Preferably, three or four ultrasonic sensors can be set. Multiple ultrasonic sensors are evenly arranged on the surface of the water receiving tray 2 facing the side of the pot to be tested, and the projection of the ultrasonic sensor on the panel 13 falls within the circumferential range of the inner ring of the pot rack 1. The control module 18 is also used to determine the pot action according to the real-time distance collected by the ultrasonic sensor, and determine the cooking scene according to the pot action. Specifically, during the detection process, the ultrasonic sensor emits ultrasonic waves to identify the real-time distance from the bottom surface of the pot supported by the pot rack 1, and the control module 18 identifies the pot action according to the real-time distance from the bottom surface of the pot supported by the pot rack 1. For example, if the distance between the bottom surface of the pot to be tested and the ultrasonic sensor continues to change, it is determined that the pot to be tested is moving; if the distance between the bottom surface of the pot to be tested and the ultrasonic sensor does not change for a long time, it is determined that the pot is in a stationary state.

[0074] Optionally, the motion detection unit includes a displacement sensor, which is used to detect the displacement of the bottom of the pot. The displacement sensor is arranged at the joint between the foot piece of the pot rack 1 and the water receiving tray 2, and the number of the displacement sensors is consistent with the number of the foot pieces of the pot rack 1. The control module 18 is also used to determine the pot action according to the real-time displacement collected by the displacement sensor, and determine the cooking scene according to the pot action. Specifically, during the detection process, the displacement sensor identifies the real-time displacement of the bottom surface of the pot, and the control module 18 identifies the pot action according to the real-time displacement of the bottom surface of the pot. For example, if the bottom surface of the pot to be tested continues to move back and forth, it is determined that the user is flipping the pot.

[0075] Optionally, the motion detection unit includes a strain force detection sensor, which is used to detect the pressure exerted on the pot rack 1. The pressure exerted on the strain force detection sensor by the pot rack 1 can indirectly reflect the motion of the pot. The strain force detection sensor is arranged at the joint between the foot piece of the pot rack 1 and the water receiving tray 2, and the number of the strain force detection sensors is consistent with the number of the foot pieces of the pot rack 1. The control module 18 is also used to determine the pot motion according to the pressure data collected by the strain force detection sensor, and determine the cooking scene according to the pot motion. Specifically, during the detection process, the strain force detection sensor detects the pressure exerted on the strain force detection sensor by the pot rack 1, and identifies the pot motion according to the change of the pressure data. For example, if the pressure exerted on the strain force detection sensor is greater than the weight of the pot rack 1, and the pressure remains unchanged for a long time, it is determined that the pot is placed on the pot rack 1 and is stationary; if the pressure exerted on the strain force detection sensor is equal to the weight of the pot rack 1, it is determined that there is no pot on the pot rack 1.

[0076] Optionally, the motion detection unit includes an acceleration sensor, which is used to detect the acceleration of the pot. The acceleration sensor is arranged at the abutment between the foot piece of the pot rack 1 and the water receiving tray 2, and the number of the acceleration sensors is consistent with the number of the foot pieces of the pot rack 1. The control module 18 is also used to determine the pot action according to the acceleration of the pot, and determine the cooking scene according to the pot action. Specifically, during the detection process, the acceleration sensor detects the acceleration of the pot, and the control module 18 identifies the pot action according to the acceleration of the pot. For example, if the acceleration sensor detects that the acceleration of the pot continues to change, it is determined that the user is flipping the pot.

[0077] refer to Fig. 9 As shown, the stove anti-dry-burn control device also includes: a timing module 19 and / or an interaction module 20; the timing module 19 is used to configure the timing duration, wherein the timing duration represents the cooking duration 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: a timing mode, a probe lifting and display mode, and an anti-dry-burn trigger mode.

[0078] refer to Fig. 9The control module 18 is connected to the timing module 19 and the interaction module 20. The timing module 19 configures the timing duration. The control module 18 obtains the timing duration and controls the stove to turn off the fire according to the timing duration. The control module 18 outputs the working mode information of the stove to the interaction module 20, and the interaction module 20 displays the working mode of the stove according to the working mode information.

[0079] 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 below the panel 13. The timing encoder knob 15 is sleeved on the upper part of the timing encoder 14 and above the panel 13. The fire knob is plugged into the top of the valve stem of the valve body 16 and is located on the upper part of the timing encoder knob 15. The valve body 16 and the timing encoder 14 are both connected to the control module 18. The interactive module 20 includes a display panel 21, which is in contact with the panel 13 and connected to the control module 18. A display screen is provided on the upper surface of the display panel 21. 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 timing minutes, and the seconds are displayed 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 111 rising and falling compared to the reference point and the highest and lowest position reminder display; in the anti-dry burning trigger mode, the display panel 21 can be used to display the anti-dry burning trigger warning information (for example, a graphic warning or a light warning).

[0080] refer to Fig. 9 As shown, the stove dry burning prevention control device of the present application further includes: a flameout protection module 23 and a fire detection module 24. The flameout protection module 23 and the fire detection module 24 are respectively connected to the control module 18, and the flameout protection module 23 performs flameout protection on the stove under the control of the control module 18; the fire detection module 24 is used to detect the flame detection data of the stove and send the flame detection data to the control module 18, and the control module 18 can judge whether the ignition is successful according to the flame detection data, or judge whether the flame is successfully extinguished according to the flame detection data.

[0081] Based on the same inventive concept, an embodiment of the present invention provides a method for controlling a stove to prevent dry burning, which is implemented based on the above stove to prevent dry burning control device. The stove of the present invention comprises a pot rack 1, a water receiving tray 2, a burner 3 and an anti-dry burning module 11. The pot rack 1 is used to support the pot to be tested. Fig.10 : is a flow chart of a stove anti-dry burning control method provided by an embodiment of the present invention, such as Fig.10 As shown, the control method of the present invention includes:

[0082] S1. Obtain material detection data and dynamic detection data of the cookware to be tested.

[0083] In this embodiment, different types of sensors or other detection elements may be arranged at positions facing the bottom surface of the cookware to be tested to collect detection data at corresponding positions.

[0084] S2. Identify the cooking scene according to the material 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 scene.

[0085] Optionally, the stove anti-dry-burning control method of the present invention further includes: determining whether the cookware to be tested is easy to deform based on material detection data, and when the cookware is an easily deformable cookware, controlling the drive component 200 to drive the anti-dry-burning module 11 to move in a direction toward the cookware to be tested until the anti-dry-burning module 11 abuts against the bottom of the cookware to be tested; and / or, when the cookware type is a non-deformable cookware, controlling the drive component 200 to drive the anti-dry-burning module 11 to move in a direction away from the cookware to be tested according to the cooking scene.

[0086] Specifically, if the cooking scene is identified as a flipping cooking scene, the driving component 200 is controlled to drive the anti-dry-burning module 11 to move in a direction away from the pot to be tested, and the driving component 200 can increase the distance between the anti-dry-burning probe 111 and the bottom surface of the pot according to the calibration data, or drive the anti-dry-burning probe 111 to hide inside the burner 3, and the display panel 21 shows that the anti-dry-burning probe 111 has descended; if it is identified that the pot to be tested has no action, the driving component 200 drives the anti-dry-burning module 11 to move in a direction away from the pot to be tested. Move toward the bottom of the pot to be tested, the display panel 21 shows that the anti-dry-burning probe 111 rises. If the anti-dry-burning probe 111 of the anti-dry-burning module 11 abuts against the bottom of the pot, the drive component 200 stops driving; some pots made of materials are prone to deformation when subjected to continuous high temperatures, such as aluminum pots. When the control module 18 determines that the pot to be tested is prone to deformation, the anti-dry-burning module 11 needs to abut against the bottom of the pot to be tested to detect whether the temperature of the bottom of the pot is too high to prevent the pot from deforming. Non-deformable pots are not easily deformed by high temperatures. When the pot type is a non-deformable pot, the drive component 200 drives the anti-dry-burning module 11 to move in a direction away from the bottom of the pot to be tested to avoid collision between the anti-dry-burning module 11 and the pot, resulting in damage to the anti-dry-burning module 11 or the pot. If the anti-dry-burn module 11 detects that the temperature of the pot bottom is higher than the anti-dry-burn protection temperature threshold, the anti-dry-burn high temperature protection is triggered, the display panel 21 displays that the anti-dry-burn mode is triggered, and the gas supply is cut off, and the stove is turned off. If the user rotates the timing encoder knob 15 to turn on the timing mode, the display panel 21 can also display the timing mode and the remaining timing time. If the anti-dry-burn high temperature protection is not triggered within the timing time, the gas supply is cut off at the end of the timing time, and the stove is turned off.

[0087] Optionally, the stove anti-dry-burning control method of the present invention further includes: determining the resistance and capacitance values ​​of the cookware to be tested according to the material detection data collected by the electrical detection unit, and determining the material of the cookware according to the resistance and capacitance values; and / or, determining the emissivity of the cookware to be tested according to the material detection data collected by the optical detection unit, and determining the material of the cookware according to the emissivity; and / or, determining the thermal conductivity of the cookware to be tested according to the material detection data collected by the thermal conductivity detection unit, and determining the material of the cookware according to the thermal conductivity.

[0088] Optionally, the stove anti-dry-burn control method of the present invention further includes: obtaining 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: timing mode, probe lifting and display mode and anti-dry-burn trigger mode.

[0089] Fig.11 FIG. 1 is a flow chart of another method for controlling a stove to prevent dry burning provided by an embodiment of the present invention. Fig.11 , the user rotates the power knob to ignite, and the thermocouple detects whether the ignition is successful. After the ignition is successful, the anti-dry-burn mode is turned on by default. Next, the electrical detection unit and the displacement sensor judge the material and action of the pot. If the pot is an aluminum pot, the drive motor 6 drives the anti-dry-burn probe 111 to abut against the bottom of the pot; if the pot has continuous action and is not an aluminum pot, the anti-dry-burn probe 111 drops to the inside of the burner 3; if the pot has no continuous action and is a non-metallic pot, the anti-dry-burn protection temperature threshold is increased by Δt; if the pot has no continuous action and is a metal pot other than an aluminum pot, the drive motor 6 drives the anti-dry-burn probe 111 to abut against the bottom of the pot. If the anti-dry-burn high temperature protection is triggered, the stove will be turned off; if the anti-dry-burn high temperature protection is not triggered, the stove will be turned off when the timing ends.

[0090] Based on the same inventive concept, a stove is provided, characterized in that it comprises: the stove anti-dry-burning control device in any embodiment of the present invention.

[0091] It should be understood that the various forms of processes shown above can be used to reorder, add or delete steps. For example, the steps described in the present invention can be executed in parallel, sequentially or in different orders, as long as the desired results of the technical solution of the present invention can be achieved, and this document does not limit this.

[0092] The above specific implementations do not constitute a limitation on the protection scope of the present invention. It should be understood by those skilled in the art that various modifications, combinations, sub-combinations and substitutions can be made according to design requirements and other factors. Any modification, equivalent substitution and improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A cooker anti-dry burning control device, the cooker comprising a pot rack, a water receiving tray, a burner and an anti-dry burning module, the pot rack being used to support the pot to be tested, characterized in that: The control device comprises: A detection module, used to obtain material 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 scene according to the material 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 scene.

2. The stove anti-dry burning control device according to claim 1, characterized in that: Also includes: A driving component, used for driving the anti-dry burning module to move; The control module is further configured to: determine whether the cookware to be tested is an easily deformable cookware based on the material detection data, and when the cookware to be tested is an easily deformable cookware, control the driving component to drive the anti-dry-burning module to move in a direction toward the cookware to be tested until the anti-dry-burning module abuts against the bottom of the cookware to be tested; and / or, when the type of cookware is a non-deformable cookware, control the driving component to drive the anti-dry-burning module to move in a direction away from the cookware to be tested according to the cooking scene.

3. The stove anti-dry burning control device according to claim 2, characterized in that: The drive assembly comprises: A drive motor connected to the control module, configured to receive a drive control signal sent by the control module and execute forward or reverse rotation according to the drive control signal; The transmission mechanism is provided with a crank portion and a connecting rod portion, wherein the crank portion is connected to the driving motor, the first end of the connecting rod portion is hinged to the crank portion, the second end of the connecting rod portion is hinged to the anti-dry-burning module, the crank portion rotates synchronously with the driving motor, and the anti-dry-burning module is driven to move in a direction toward or away from the cookware to be tested through the connecting rod portion; The control module is configured to: obtain the crank radius and connecting rod length of the transmission mechanism, determine the moving distance of the anti-dry burning module according to the material detection data and the dynamic detection data, determine the crank angle according to the moving distance, the crank radius and the connecting rod length, and issue the drive control signal according to the crank angle.

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

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

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 to be tested according to the material detection data collected by the electrical detection unit, and determine the material of the cookware according to the resistance and capacitance values; and / or, Determining the emissivity of the cookware to be tested according to the material detection data collected by the optical detection unit, and determining the material of the cookware according to the emissivity; and / or, The thermal conductivity of the cookware to be tested is determined according to the material detection data collected by the thermal conductivity detection unit, and the material of the cookware is determined according to the thermal conductivity.

7. The stove anti-dry burning control device according to claim 1, characterized in that: The detection module is configured to: identify at least one of the real-time distance from the bottom surface of the cookware, the pressure on the pot rack, and the acceleration of the cookware; The control module is further configured to determine the pot movement and the pot shape according to at least one of the real-time distance from the bottom surface of the pot, the pressure borne by the pot rack, or the acceleration of the pot.

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

9. A method for controlling a stove to prevent dry burning, wherein the stove comprises a pot rack, a water receiving tray, a burner and an anti-dry burning module, wherein the pot rack is used to support the pot to be tested, and wherein: The control method comprises: Acquiring material detection data and dynamic detection data of the cookware to be tested; The cooking scene is identified according to the material 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 scene.

10. A cooking appliance, characterized in that: include: The stove anti-dry burning control device according to any one of claims 1 to 8.

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