Method and device for preventing dry burning of cookware, and stove

Abstract

The present application relates to the technical field of cooking utensils, and discloses a method for preventing a cooker from being dry-burned, comprising: obtaining the capacitance value of a capacitor formed by a cooker and an electrode plate; determining the cooker material according to the capacitance value; and performing an anti-dry-burning operation corresponding to the cooker material. The cooker material is determined by detecting the capacitance value of a capacitor formed by a cooker and an electrode plate, and then an anti-dry-burning operation corresponding to the cooker material is performed. In this way, different anti-dry-burning operations are performed according to different materials of the cooker, and the dry-burning state of the cooker can be accurately judged, thereby better playing the role of preventing the cooker from being dry-burned. The present application also discloses a device and a stove for preventing a cooker from being dry-burned.

Description

Technical Field

[0001] The present application relates to the technical field of cooking utensils, for example, to a method and device for preventing dry burning of pots and a stove. Background Art

[0002] Dry-burn prevention means preventing the pot from being powered on without water, or from continuing to be powered on and dry-burning when the water is dry, so as to prevent dry-burning from causing fire or other economic losses. Current dry-burn prevention gas stoves implement dry-burn prevention operations by setting a unified dry-burn prevention temperature. When the pot temperature reaches the preset dry-burn prevention temperature, the fire is turned off.

[0003] In the process of implementing the embodiments of the present disclosure, it is found that there are at least the following problems in the related art:

[0004] Cooking utensils can generally be divided into ceramic pots and metal pots. Since the dry-burning point temperatures of ceramic pots and metal pots are different (the dry-burning temperature of ceramic pots is high and that of metal pots is low), the current anti-dry-burning gas stoves cannot accurately judge the dry-burning status of the pots, and cannot play a good role in preventing the pots from dry-burning. Summary of the invention

[0005] In order to provide a basic understanding of some aspects of the disclosed embodiments, a brief summary is given below. The summary is not an extensive review, nor is it intended to identify key / critical components or delineate the scope of protection of these embodiments, but rather serves as a prelude to the detailed description that follows.

[0006] The embodiments of the present disclosure provide a method and device for preventing cookware from burning dry, and a stove, so as to solve the problem that the current anti-dry-burning gas stove cannot accurately judge the dry-burning state of the cookware and cannot effectively prevent the cookware from burning dry due to the different dry-burning point temperatures of different cookware.

[0007] In some embodiments, a method for preventing a cooker from boiling dry comprises:

[0008] Obtaining the capacitance value of the capacitor formed by the cooker and the electrode plate;

[0009] Determine the material of the cookware based on the capacitance value;

[0010] Perform the anti-dry boil operation corresponding to the material of the cookware.

[0011] In some embodiments, the device for preventing cookware from burning dry includes a processor and a memory storing program instructions, and the processor is configured to execute the above-mentioned method for preventing cookware from burning dry when executing the program instructions.

[0012] In some embodiments, the stove includes the above-mentioned device for preventing the cooker from drying out.

[0013] The method and device for preventing dry burning of cookware and the cooker provided by the embodiments of the present disclosure can achieve the following technical effects:

[0014] The material of the pot is determined by detecting the capacitance value of the capacitor formed by the pot and the electrode plate, and then the anti-dry-burning operation corresponding to the material of the pot is performed. In this way, different anti-dry-burning operations are performed according to the different materials of the pot, which can accurately determine the dry-burning state of the pot, thereby better playing the role of preventing the pot from dry-burning.

[0015] The above general description and the following description are exemplary and explanatory only and are not intended to limit the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] One or more embodiments are exemplarily described by corresponding drawings, which do not limit the embodiments. Elements with the same reference numerals in the drawings are shown as similar elements, and the drawings do not constitute a scale limitation, and wherein:

[0017] Figure 1 It is a flow chart of a method for preventing a cooker from drying out provided by an embodiment of the present disclosure;

[0018] Figure 2 is a flow chart of another method for preventing a cooker from drying out provided by an embodiment of the present disclosure;

[0019] Figure 3 is a flow chart of another method for preventing a cooker from drying out provided by an embodiment of the present disclosure;

[0020] Figure 4 is a flow chart of another method for preventing a cooker from drying out provided by an embodiment of the present disclosure;

[0021] Figure 5 is a schematic diagram of the structure of an oscillation circuit provided by an embodiment of the present disclosure;

[0022] Figure 6 It is a schematic diagram of a device for preventing a cooker from drying out provided in an embodiment of the present disclosure. DETAILED DESCRIPTION

[0023] In order to be able to understand the features and technical contents of the embodiments of the present disclosure in more detail, the implementation of the embodiments of the present disclosure is described in detail below in conjunction with the accompanying drawings. The attached drawings are for reference only and are not used to limit the embodiments of the present disclosure. In the following technical description, for the convenience of explanation, a full understanding of the disclosed embodiments is provided through multiple details. However, one or more embodiments can still be implemented without these details. In other cases, to simplify the drawings, well-known structures and devices can be simplified for display.

[0024] The terms "first", "second", etc. in the specification and claims of the embodiments of the present disclosure 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 terms used in this way can be interchanged where appropriate, so that the embodiments of the embodiments of the present disclosure described herein. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions.

[0025] Unless otherwise specified, the term "plurality" means two or more. The character " / " indicates that the objects before and after are in an "or" relationship. For example, A / B means: A or B. The term "and / or" is a description of the association relationship between objects, indicating that there can be three relationships. For example, A and / or B means: A or B, or, A and B.

[0026] Combination Figure 1 As shown, the embodiment of the present disclosure provides a method for preventing a cooker from drying out, comprising the following steps:

[0027] S101: Obtaining the capacitance value of the capacitor formed by the cooker and the electrode plate.

[0028] Two parallel electrode plates form a parallel plate capacitor. The capacitance calculation formula of a parallel plate capacitor is as follows:

[0029]

[0030] Among them, C is the capacitance value of the parallel plate capacitor, ε is the dielectric constant (relative dielectric constant), k is the electrostatic force constant, S is the area facing the two plates, and d is the vertical distance between the two plates.

[0031] According to the capacitance calculation formula of the above-mentioned parallel plate capacitor, when the vertical distance d between the two plates is constant, the capacitance value C of the parallel plate capacitor is positively correlated with the area S of the two plates facing each other. In practical applications, the two electrode plates constituting the capacitor include an original upper plate and a lower plate parallel to each other, and the area of ​​the original upper plate is smaller than the area of ​​the lower plate. The pot is placed on the original upper plate and is in the same plane as the original upper plate, and together with the original upper plate, it constitutes the upper plate of the capacitor. In this way, the pot and the electrode plate together constitute a capacitor, and increase the area of ​​the upper plate and the lower plate facing each other (the area of ​​the pot is larger than the area of ​​the upper plate), thereby changing the capacitance value of the capacitor.

[0032] S102: Determine the material of the cookware according to the capacitance value.

[0033] Since the electrode plates that form the capacitor need to store and release charges during operation, the electrode plates need to be conductive. When the pot is made of metal, the pot and the original upper electrode plate together form the upper plate of the capacitor, and the capacitance value of the capacitor formed by the pot and the electrode plate increases compared to the capacitance formed by the original upper and lower plates. When the pot is made of non-metallic material, the pot does not meet the conductive conditions of the electrode plate, so it does not form a capacitor together with the electrode plate, and does not change the capacitance value of the capacitor. Therefore, it is possible to judge whether the pot is made of metal or non-metallic material based on the change in capacitance value.

[0034] S103: Execute an anti-dry-boiling operation corresponding to the material of the cookware.

[0035] Generally speaking, the anti-dry-burning temperature of metal pots is lower, and the anti-dry-burning temperature of non-metal pots is higher. Therefore, different anti-dry-burning operations are performed according to the different materials of the pots.

[0036] The method for preventing a cooker from burning dry provided by the embodiment of the present disclosure determines the cooker material by detecting the capacitance value of the capacitor formed by the cooker and the electrode plate, and then performs a dry-burn prevention operation corresponding to the cooker material. In this way, different dry-burn prevention operations are performed according to different cooker materials, and the dry-burn state of the cooker can be accurately determined, thereby better preventing the cooker from burning dry.

[0037] In some embodiments, in combination Figure 2 As shown, obtaining the capacitance value of the capacitor formed by the cooker and the electrode plate includes the following steps:

[0038] S201: Obtain the oscillation frequency of the oscillation circuit in which the capacitor is located.

[0039] An oscillator circuit is a circuit that can automatically convert DC power into an AC signal with a certain amplitude and frequency without an external signal. The oscillator circuit includes an amplifier, a positive feedback circuit, and a frequency selection network, among which: the amplifier can amplify the input signal applied to the output end of the oscillator circuit to keep the output signal constant; the positive feedback circuit ensures that the feedback signal provided to the input end of the oscillator circuit is in the same phase; the frequency selection network only allows a certain frequency f 0 The oscillation circuit can generate a single frequency output. The embodiment of the present disclosure obtains the oscillation frequency of the oscillation circuit and then indirectly calculates the capacitance value of the capacitor, and the acquisition method is simpler and more flexible.

[0040] Optionally, obtaining the oscillation frequency of the oscillation circuit in which the capacitor is located includes: obtaining multiple oscillation frequencies detected within a preset time period; performing data processing on the multiple oscillation frequencies to obtain a processed oscillation frequency; and using the processed oscillation frequency as the oscillation frequency. The preset time period is a preset period before the current moment (for example, the previous 3 minutes). When there are other objects on the electrode plates, the oscillation frequency of the oscillation circuit will be affected (for example, food debris falls on the lower electrode plate). In order to reduce the impact of accidental events on the collected oscillation frequency, multiple oscillation frequencies are collected within a preset time period, and data processing is performed on the multiple oscillation frequencies to obtain a final oscillation frequency, thereby reducing the randomness of oscillation frequency changes and improving the accuracy of the oscillation frequency.

[0041] Optionally, performing data processing on the plurality of oscillation frequencies to obtain a processed oscillation frequency comprises:

[0042]

[0043] in, is the processed oscillation frequency, n is the number of oscillation frequencies detected within a preset time period, and f n is the nth oscillation frequency detected within the preset time period, α n f n The weighting coefficient, α 1 +…+α n =1.

[0044] In this way, multiple oscillation frequencies detected within a preset time period are weighted averaged to obtain a weighted average oscillation frequency (processed oscillation frequency), and the weighted average oscillation frequency is used as the final oscillation frequency of the oscillation circuit, which can reduce the influence of accidental factors and improve the accuracy of the oscillation frequency acquisition method of the oscillation circuit.

[0045] Optionally, α n Positively correlated with n, that is, as the value of n increases, α n The value of increases. For example, when n = 5, α 1 =0.1,α n =0.15,α n =0.2,α n =0.25,α n =0.3. n is the nth oscillation frequency f detected within the preset time period n The weighting coefficient, α n Positively correlated with n, indicating that f n The closer the detection time is to the current time, the greater the weighting coefficient is. In this way, the weighted average oscillation frequency can better represent the oscillation frequency of the oscillation circuit at the current time.

[0046] Optionally, performing data processing on multiple oscillation frequencies to obtain a processed oscillation frequency includes: obtaining an average oscillation frequency of the multiple oscillation frequencies; calculating the oscillation frequency difference between the multiple oscillation frequencies and the average oscillation frequency; and using the oscillation frequency with the smallest oscillation frequency difference among the multiple oscillation frequencies as the processed oscillation frequency. In this way, the influence of accidental factors can be reduced and the accuracy of the oscillation frequency acquisition method of the oscillation circuit can be improved.

[0047] S202: Calculate the capacitance value according to the oscillation frequency.

[0048] In the embodiment of the present disclosure, an LC oscillation circuit is used to obtain the oscillation frequency, that is, the frequency selection network of the oscillation circuit is composed of an inductor L and a capacitor C. Figure 5 As shown, the oscillation circuit includes a peripheral drive circuit (including an amplifier and a positive feedback circuit), an inductor L, a capacitor C, and an electrode plate S connected in sequence. 0 , where: the inductor L and the capacitor C are connected in parallel with the peripheral drive circuit respectively; the electrode plate S 0 One end is connected to the peripheral driving circuit, and the other end is grounded.

[0049] Optionally, the capacitance value is calculated according to the oscillation frequency, including:

[0050]

[0051] Among them, C 0 is the capacitance of the capacitor formed by the cooker and the electrode plate, L is the inductance of the inductor L in the oscillation circuit, and f is the oscillation frequency.

[0052] The LC oscillation circuit has a wide oscillation frequency range and is easy to oscillate. When the capacitance value of the capacitor formed by the cookware and the electrode plate changes, the oscillation frequency f will change significantly accordingly, making the detection result more accurate, and thus making the capacitance value obtained by calculating the oscillation frequency more accurate.

[0053] In some embodiments, in combination Figure 3 As shown, determining the material of the cookware according to the capacitance value includes the following steps:

[0054] S301: Obtain a capacitance difference between a capacitance value and an initial capacitance value.

[0055] The initial capacitance value is the capacitance value of the capacitor formed by the two electrode plates, the upper plate and the lower plate, which are parallel to each other.

[0056] S302: Determine whether the capacitance difference is greater than or equal to a preset capacitance difference.

[0057] Those skilled in the art can determine the preset capacitance difference based on previous experimental data, so that the preset capacitance difference can accurately reflect the change in capacitance value brought about by the metal cookware based on the initial capacitance value, thereby making the judgment result of the cookware material more accurate.

[0058] S303: When the capacitance difference is greater than or equal to a preset capacitance difference, it is determined that the material of the cookware is metal.

[0059] When the capacitance difference is greater than or equal to the preset capacitance difference, it indicates that the cookware and the original upper electrode plate together constitute the upper plate of the capacitor, and relative to the capacitance formed by the original upper plate and lower plate, the capacitance value of the capacitor formed by the cookware and the electrode plate is significantly increased, thus determining that the cookware is made of metal.

[0060] S304: When the capacitance difference is less than a preset capacitance difference, it is determined that the material of the cookware is a non-metallic material.

[0061] When the capacitance difference is less than the preset capacitance difference, it indicates that the cookware does not meet the conductive conditions of the electrode plate, and therefore does not form a capacitor together with the electrode plate, nor does it significantly change the capacitance value of the capacitor, and therefore the cookware is determined to be made of non-metallic material.

[0062] Obtaining the capacitance difference between the capacitance formed by the cookware and the electrode plate and the initial capacitance value, and judging the cookware material based on the change in the capacitance difference, can reduce the influence of accidental factors (such as other conductive objects falling on the lower electrode plate causing the capacitance value to change), thereby more accurately judging the cookware material.

[0063] In some embodiments, in combination Figure 4 As shown, performing the anti-dry-burning operation corresponding to the material of the cookware includes the following steps:

[0064] S401: Obtaining the bottom temperature of the cookware and the anti-dry-burning temperature corresponding to the material of the cookware.

[0065] The temperature of the bottom of the cookware can be obtained by using a temperature sensor, and based on the determined cookware material, the anti-dry-burning temperature corresponding to the cookware material can be searched according to a corresponding relationship table between the cookware material and the anti-dry-burning temperature.

[0066] S402: Determine whether the temperature of the pot bottom is greater than or equal to the anti-dry-burning temperature.

[0067] S403: When the temperature of the pot bottom is greater than or equal to the anti-dry-burning temperature, the operation of reducing the firepower is performed.

[0068] When the temperature of the pot bottom is greater than or equal to the anti-dry-burning temperature, in order to avoid the pot from drying out, the fire is reduced (for example, the fire is turned off) to prevent the temperature of the pot bottom from continuing to rise and causing danger.

[0069] S404: When the temperature of the pot bottom is lower than the anti-dry-burning temperature, the original firepower operation is continued.

[0070] When the temperature of the pot bottom is lower than the anti-dry burning temperature, continue to operate at the original fire and perform normal cooking work.

[0071] By obtaining the bottom temperature of the pot and the anti-dry-burning temperature corresponding to the material of the pot, and performing corresponding fire operations according to the bottom temperature of the pot and the anti-dry-burning temperature, the dry-burning state of the pot can be accurately judged, thereby better playing the role of preventing the pot from dry-burning.

[0072] In some embodiments, the method for preventing the cookware from being dry-burned further includes: after determining the cookware material according to the capacitance value, rechecking the test result of the cookware material, so as to ensure the accuracy of the cookware material test according to the capacitance value, so that the accurate dry-burning prevention operation can be performed according to the test result.

[0073] Optionally, the test result of the cookware material is reviewed, including: obtaining the temperature rise curve of the cookware and the pre-stored temperature rise curve corresponding to the cookware material; when the temperature rise curve is consistent with the preset temperature rise curve, determining that the test result of the cookware material is correct; when the temperature rise curve is inconsistent with the preset temperature rise curve, determining that the test result of the cookware material is incorrect. The temperature rise curve can reflect the temperature change rate of an object under certain fire conditions. The temperature rise curves of different materials will be different, so the temperature rise curve of the cookware can be used to further verify the cookware material.

[0074] Optionally, the method for preventing the pot from burning dry further includes: after determining that the detection result of the pot material is wrong, issuing a prompt message. The prompt message includes a voice prompt message or a light prompt message. In this way, the user can be reminded in time to perform relevant operations to prevent the pot from burning dry.

[0075] Combination Figure 6 The embodiment of the present disclosure provides a device for preventing a cooker from burning dry, including a processor 60 and a memory 61, and may also include a communication interface 62 and a bus 63. The processor 60, the communication interface 62, and the memory 61 may communicate with each other through the bus 63. The communication interface 62 may be used for information transmission. The processor 60 may call the logic instructions in the memory 61 to execute the method for preventing a cooker from burning dry in the above embodiment.

[0076] In addition, the logic instructions in the above-mentioned memory 61 can be implemented in the form of software functional units and can be stored in a computer-readable storage medium when sold or used as an independent product.

[0077] The memory 61 is a computer-readable storage medium that can be used to store software programs and computer-executable programs, such as program instructions / modules corresponding to the method in the embodiment of the present disclosure. The processor 60 executes the function application and data processing by running the program instructions / modules stored in the memory 61, that is, the method for preventing dry boiling of the cooker in the above method embodiment is implemented.

[0078] The memory 61 may include a program storage area and a data storage area, wherein the program storage area may store an operating system and an application required for at least one function; the data storage area may store data created according to the use of the terminal device, etc. In addition, the memory 61 may include a high-speed random access memory and may also include a non-volatile memory.

[0079] An embodiment of the present disclosure provides a stove, comprising the above-mentioned device for preventing dry-burning of cookware.

[0080] An embodiment of the present disclosure provides a computer-readable storage medium storing computer-executable instructions, wherein the computer-executable instructions are configured to execute the above-mentioned method for preventing dry-boiling of cookware.

[0081] An embodiment of the present disclosure provides a computer program product, which includes a computer program stored on a computer-readable storage medium, and the computer program includes program instructions. When the program instructions are executed by a computer, the computer executes the above-mentioned method for preventing dry burning of cookware.

[0082] The computer-readable storage medium mentioned above may be a transient computer-readable storage medium or a non-transitory computer-readable storage medium.

[0083] The technical solution of the embodiment of the present disclosure can be embodied in the form of a software product, which is stored in a storage medium and includes one or more instructions for enabling a computer device (which may be a personal computer, a server, or a network device, etc.) to perform all or part of the steps of the method described in the embodiment of the present disclosure. The aforementioned storage medium may be a non-transient storage medium, including: a USB flash drive, a mobile hard disk, a read-only memory (ROM), a random access memory (RAM), a magnetic disk or an optical disk, and other media that can store program codes, or a transient storage medium.

[0084] The above description and the accompanying drawings fully illustrate the embodiments of the present disclosure so that those skilled in the art can practice them. Other embodiments may include structural, logical, electrical, process and other changes. The embodiments represent only possible changes. Unless explicitly required, individual components and functions are optional, and the order of operation may vary. The parts and features of some embodiments may be included in or replace the parts and features of other embodiments. The scope of the embodiments of the present disclosure includes the entire scope of the claims, and all available equivalents of the claims. When used in this application, although the terms "first", "second", etc. may be used in this application to describe each element, these elements should not be limited by these terms. These terms are only used to distinguish one element from another element. For example, without changing the meaning of the description, the first element can be called the second element, and similarly, the second element can be called the first element, as long as all occurrences of the "first element" are renamed consistently and all occurrences of the "second element" are renamed consistently. The first element and the second element are both elements, but may not be the same element. Moreover, the words used in this application are only used to describe the embodiments and are not used to limit the claims. As used in the description of the embodiments and claims, unless the context clearly indicates, the singular forms "a", "an" and "the" are intended to include the plural forms as well. Similarly, the term "and / or" as used in this application refers to any and all possible combinations of one or more associated listings. In addition, when used in this application, the term "comprise" and its variants "comprises" and / or comprising refer to the presence of stated features, wholes, steps, operations, elements, and / or components, but do not exclude the presence or addition of one or more other features, wholes, steps, operations, elements, components and / or groups of these. In the absence of further restrictions, the elements defined by the sentence "including one..." do not exclude the presence of other identical elements in the process, method or device including the elements. In this article, each embodiment may focus on the differences from other embodiments, and the same and similar parts between the embodiments may refer to each other. For the methods, products, etc. disclosed in the embodiments, if they correspond to the method part disclosed in the embodiments, then the relevant parts can refer to the description of the method part.

[0085] Those skilled in the art will appreciate that the units and algorithm steps of each example described in conjunction with the embodiments disclosed herein can be implemented in electronic hardware, or a combination of computer software and electronic hardware. Whether these functions are performed in hardware or software may depend on the specific application and design constraints of the technical solution. The technicians may use different methods for each specific application to implement the described functions, but such implementations should not be considered to exceed the scope of the embodiments of the present disclosure. The technicians may clearly understand that, for the convenience and simplicity of description, the specific working processes of the systems, devices and units described above may refer to the corresponding processes in the aforementioned method embodiments, and will not be repeated here.

[0086] In the embodiments disclosed herein, the disclosed methods and products (including but not limited to devices, equipment, etc.) can be implemented in other ways. For example, the device embodiments described above are only schematic. For example, the division of the units can be only a logical function division. There may be other division methods in actual implementation, such as multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. In addition, the coupling or direct coupling or communication connection between each other shown or discussed can be through some interfaces, indirect coupling or communication connection of devices or units, which can be electrical, mechanical or other forms. The units described as separate components may or may not be physically separated, and the components displayed as units may or may not be physical units, that is, they may be located in one place, or they may be distributed on multiple network units. Some or all of the units may be selected according to actual needs to implement this embodiment. In addition, each functional unit in the embodiment of the present disclosure may be integrated in a processing unit, or each unit may exist physically alone, or two or more units may be integrated in one unit.

[0087] The flowchart and block diagram in the accompanying drawings show the possible architecture, function and operation of the system, method and computer program product according to the embodiment of the present disclosure. In this regard, each box in the flowchart or block diagram can represent a module, a program segment or a part of the code, and the module, the program segment or a part of the code contains one or more executable instructions for realizing the specified logical function. In some alternative implementations, the functions marked in the box can also occur in a different order from the order marked in the accompanying drawings. For example, two consecutive boxes can actually be executed substantially in parallel, and they can sometimes be executed in the opposite order, which can depend on the functions involved. In the description corresponding to the flowchart and the block diagram in the accompanying drawings, the operations or steps corresponding to different boxes can also occur in a different order from the order disclosed in the description, and sometimes there is no specific order between different operations or steps. For example, two consecutive operations or steps can actually be executed substantially in parallel, and they can sometimes be executed in the opposite order, which can depend on the functions involved. Each block in the block diagrams and / or flowcharts, and combinations of blocks in the block diagrams and / or flowcharts, may be implemented by a dedicated hardware-based system that performs the specified functions or actions, or may be implemented by a combination of dedicated hardware and computer instructions.

Claims

1. A method for preventing a cooker from drying out, characterized in that: include: Obtaining the capacitance value of the capacitor formed by the cookware and the electrode plates; wherein the two electrode plates forming the capacitor include an original upper electrode plate and a lower electrode plate which are parallel to each other, the area of ​​the original upper electrode plate is smaller than the area of ​​the lower electrode plate, the cookware is placed on the original upper electrode plate and is in the same plane as the original upper electrode plate, and together with the original upper electrode plate, forms the upper electrode plate of the capacitor; determining the material of the cookware according to the capacitance value; Execute the anti-dry-boiling operation corresponding to the material of the cookware; Wherein, obtaining the capacitance value of the capacitor formed by the cookware and the electrode plate includes: obtaining multiple oscillation frequencies of the oscillation circuit in which the capacitor is located detected within a preset time period; performing data processing on the multiple oscillation frequencies to obtain a processed oscillation frequency; using the processed oscillation frequency as the oscillation frequency of the oscillation circuit in which the capacitor is located; and calculating the capacitance value according to the oscillation frequency; The performing data processing on the plurality of oscillation frequencies to obtain processed oscillation frequencies comprises: in, is the processed oscillation frequency, n is the number of oscillation frequencies detected within a preset time period, is the nth oscillation frequency detected within the preset time period, for The weighting coefficient of Positively correlated with n, α1 +…+α n =1; Determining the material of the cookware based on the capacitance value includes: obtaining a capacitance difference between the capacitance value and an initial capacitance value; when the capacitance difference is greater than or equal to a preset capacitance difference, determining that the material of the cookware is a metal material; and / or, when the capacitance difference is less than a preset capacitance difference, determining that the material of the cookware is a non-metal material.

2. The method according to claim 1, characterized in that The calculating the capacitance value according to the oscillation frequency comprises: in, is the capacitance value of the capacitor formed by the cooker and the electrode plate, L is the inductance value of the inductor L in the oscillation circuit, is the oscillation frequency.

3. The method according to claim 1 or 2, characterized in that: The performing of the anti-dry-burning operation corresponding to the material of the cookware includes: Obtaining the bottom temperature of the cookware and the anti-dry-burning temperature corresponding to the material of the cookware; When the temperature of the pot bottom is greater than or equal to the anti-dry burning temperature, the operation of reducing the firepower is performed.

4. The method according to claim 1, characterized in that: Also includes: After determining the material of the cookware based on the capacitance value, the test results of the cookware material are reviewed.

5. The method according to claim 4, characterized in that Review the test results of the cookware material, including: Obtaining a temperature rise curve of the cookware and a preset temperature rise curve corresponding to the material of the cookware; When the temperature rise curve is consistent with the preset temperature rise curve, it is determined that the test result of the cookware material is correct; When the temperature rise curve is inconsistent with the preset temperature rise curve, it is determined that the detection result of the cookware material is incorrect.

6. The method according to claim 5, characterized in that Also includes: After determining that the test result of the cookware material is wrong, a prompt message is issued.

7. A device for preventing a cooker from drying out, comprising a processor and a memory storing program instructions, characterized in that: The processor is configured to execute the method for preventing dry boiling of cookware as claimed in any one of claims 1 to 6 when executing the program instructions.

8. A cooking appliance, characterized in that: The invention comprises a device for preventing a cooker from drying out as claimed in claim 7.

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