Cooker, control method and control device for preventing dry burning thereof

Abstract

The present application relates to the technical field of smart home appliances, and discloses a stove. The stove includes a contact portion, a conductivity detection device, and a capacitance detection device. The conductivity detection device is arranged on the contact portion and is configured to detect the conductivity of a pot placed on the contact portion; the capacitance detection device is arranged on the contact portion and is configured to contact the pot placed on the contact portion. By arranging the contact portion, the conductivity detection device, and the capacitance detection device on the stove, the material of the pot can be judged according to the conductivity of the pot, and when the conductivity of the pot meets the material of the non-metallic pot, the anti-dry-burning temperature for controlling the stove to stop heating is determined according to the material of the pot, and accurate material judgment is achieved, so that pots of different materials can be accurately prevented from dry-burning, and the misjudgment rate of anti-dry-burning is effectively reduced.

Description

Technical Field

[0001] The present application relates to the technical field of smart home appliances, for example, to a stove, and a control method and a control device for preventing dry burning thereof. Background Art

[0002] Dry burning refers to heating an empty pot for a long time. Due to the long heating time, the pot will dry out or burn. It is a common safety hazard in the kitchen. Dry burning of pots will cause the pots to change color and deform. In serious cases, it may even cause a fire. At present, the anti-dry burning function is common in household stoves. By automatically shutting down the stove when the pot reaches the set threshold, the anti-dry burning control of the pot is realized, which plays a role in protecting the pot.

[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] In the related art, the conductivity of the cookware is detected, and then the material of the cookware is judged to implement the anti-dry-burning strategy corresponding to the material of the cookware. However, for some cookware that has been used for a long time, a lot of oil may be attached to the bottom during use, which may cause misdetection when testing its conductivity, resulting in misjudgment of its material, which makes it difficult to judge the anti-dry-burning control corresponding to the material, and the anti-dry-burning effect is limited. Summary of the invention

[0005] The embodiments of the present disclosure provide a cooker, a method and a device for preventing dry burning thereof, so as to solve the technical problems in the related art that when the cooker is prevented from dry burning only by temperature information, the error is large and the anti-dry burning effect is limited.

[0006] In some embodiments, the stove includes a contact portion, and also includes: a conductivity detection device, which is disposed on the contact portion and is configured to detect the conductivity of the pot placed on the contact portion; and a capacitance detection device, which is disposed on the contact portion and is configured to contact the pot placed on the contact portion.

[0007] In some embodiments, the control method for preventing dry-burning of a stove includes: obtaining a conductivity detection result of the cookware; when the conductivity of the cookware satisfies a first condition, obtaining a capacitance value detected by a capacitance detection device; determining the material of the cookware according to the capacitance value, and performing an anti-dry-burning operation corresponding to the material of the cookware.

[0008] In some embodiments, the control device for preventing dry burning of a stove comprises a processor and a memory storing program instructions, and the processor is configured to execute the above-mentioned control method for preventing dry burning of a stove when executing the program instructions.

[0009] The stove, control method and control device for preventing dry burning of the stove provided by the embodiments of the present disclosure can achieve the following technical effects:

[0010] By setting a contact part and a conductivity detection device and a capacitance detection device on the stove, the conductivity of the pot placed on the stove and / or the change in capacitance are detected, so that the material of the pot can be judged according to the conductivity of the pot, and when the conductivity of the pot meets the material of the non-metallic pot, the material of the pot is secondarily judged according to the change in the capacitance value of the pot, and the anti-dry-burning temperature for controlling the stove to stop heating is determined according to the material of the pot. When the temperature of the pot is greater than the anti-dry-burning temperature, the stove is controlled to stop heating to prevent the dry-burning problem. By performing capacitance detection on pots that are not conductive, accurate material judgment is achieved, so that pots of different materials can be accurately prevented from dry-burning, effectively reducing the misjudgment rate of anti-dry-burning.

[0011] 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

[0012] One or more embodiments are exemplarily described by corresponding drawings, and these exemplary descriptions and drawings do not constitute limitations on the embodiments. Elements with the same reference numerals in the drawings are considered similar elements, and the drawings do not constitute a scale limitation, and wherein:

[0013] Figure 1 is a schematic diagram of a cooker provided in an embodiment of the present disclosure;

[0014] Figure 2 is a schematic diagram of a control method for preventing dry burning of a stove provided by an embodiment of the present disclosure;

[0015] Figure 3 is a schematic diagram of a control method for preventing dry burning of a stove provided by an embodiment of the present disclosure;

[0016] Figure 4 is a schematic diagram of the structure of an oscillation circuit provided by an embodiment of the present disclosure;

[0017] Figure 5 It is a schematic diagram of a control device for preventing dry burning of a stove provided in an embodiment of the present disclosure. DETAILED DESCRIPTION

[0018] 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.

[0019] 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.

[0020] Unless otherwise stated, the term "plurality" means two or more.

[0021] In the embodiment of the present disclosure, the character " / " indicates that the preceding and following objects are in an "or" relationship. For example, A / B indicates: A or B.

[0022] The term "and / or" is a description of the association relationship between objects, indicating that three relationships can exist. For example, A and / or B means: A or B, or, A and B.

[0023] Figure 1 Schematic diagram of a stove provided by an embodiment of the present disclosure. Figure 1 As shown, the cooker includes a contact portion 1, a conductivity detection device 2 and a capacitance detection device 3. The contact portion 1 is used to support and contact the pot placed on the cooker, the conductivity detection device 2 is used to detect the conductivity of the pot placed on the contact portion 1; the capacitance detection device 3 contacts the pot placed on the contact portion 1 to detect the capacitance value.

[0024] The contact portion 1 may be a component of the stove itself that contacts the pot, such as a burner head, a fire cover, etc., or may be a component detachably connected to the stove, such as a stove rack, a pot rack, a pot support, etc.

[0025] The conductivity detection device 2 can be an electrode contact, a conductivity detector, or other device that can detect conductivity. It is installed on the contact portion 1 through a connector to detect the conductivity of the pot placed on the contact portion. Generally, the conductivity of the pot varies depending on the material of the pot. The conductivity detection device 2 performs contact-type conductivity detection on the pot, and the conductivity detection result obtained is related to the material of the pot.

[0026] The capacitance detection device 3 may be a capacitance detector, a capacitance sensor, etc. It is mounted on the contact portion 1 through a connector to measure capacitance changes during the contact process of the cookware on the contact portion 1 .

[0027] Optionally, the capacitance detection device 3 includes an electrode plate and a capacitance detection circuit. The electrode plate includes an upper electrode plate and a lower electrode plate, and the upper electrode plate is in contact with the cookware; the capacitance detection circuit is used to detect the capacitance value of the capacitor formed by the upper electrode plate and the lower electrode plate, and / or to detect the capacitance value of the capacitor formed by the lower electrode plate and the cookware.

[0028] Here, the upper electrode plate and the lower electrode plate are arranged in parallel to form a parallel plate capacitor. The capacitance value of the parallel plate capacitor is obtained 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 formula (1), when the vertical distance d between the two plates is constant, the capacitance C of the parallel plate capacitor is positively correlated with the area S of the two plates facing each other. Specifically, in the present embodiment, when the pot is not placed on the contact portion 1, the capacitor is formed by the upper electrode plate and the lower electrode plate which are parallel to each other, and the area of ​​the original upper electrode plate is smaller than that of the lower electrode plate. When the pot is placed on the contact portion 1, the upper electrode plate contacts the pot. When the pot material is a metal pot, the pot and the original upper electrode plate together constitute the upper electrode plate of the capacitor. Since the projection area of ​​the pot on the lower electrode plate increases, the area of ​​the upper electrode plate facing the lower electrode plate increases. According to formula (1), the capacitance value has changed. When the pot material is a non-metallic pot, since the pot will not form a path after contacting the upper electrode plate, the capacitance value will not change.

[0032] The stove provided by the embodiment of the present disclosure is used to detect the conductivity of the pot placed on the stove and / or the change in capacitance by setting a contact part and a conductivity detection device 2 and a capacitance detection device 3 on the stove, so as to judge the material of the pot according to the conductivity and / or the change in capacitance of the pot, and determine the anti-dry-burn temperature for controlling the stove to stop heating according to the material of the pot, so as to prevent the dry-burn problem. Accurate dry-burn prevention is achieved for pots of different materials, and the false judgment rate of anti-dry-burn prevention is effectively reduced.

[0033] Figure 2 is a flow chart of a control method for preventing dry burning of a stove provided by an embodiment of the present disclosure. The control method for preventing dry burning of a stove is applied to Figure 1The cooker shown, combined with Figure 2 As shown, the control method for preventing dry burning of a stove comprises:

[0034] Step S01, obtaining the test result of the conductivity of the cookware.

[0035] Here, the conductivity test result of the cooker refers to the test of the conductivity of the cooker performed when the conductivity detection device arranged on the contact part of the cooker contacts the cooker. The conductivity of the cooker varies depending on the material of the cooker, so the conductivity test result is related to the material of the cooker.

[0036] Step S02: when the conductivity of the cookware satisfies the first condition, obtaining the capacitance value detected by the capacitance detection device.

[0037] Here, the first condition is used to express a control condition related to the material of the cookware, which is used to judge the material of the cookware when the conductivity of the cookware meets the control condition, so as to determine different anti-dry burning strategies according to the material of the cookware to prevent dry burning problems. In this way, a preliminary judgment of the material of the cookware can be made based on the conductivity test results of the cookware. Since cookware of different materials has different anti-dry burning thresholds, accurate anti-dry burning according to material information is achieved for cookware in different cooking states, which simplifies the judgment method and effectively reduces the misjudgment rate of anti-dry burning.

[0038] Step S03, determining the material of the cookware according to the capacitance value, and performing an anti-dry-boiling operation corresponding to the material of the cookware.

[0039] 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 electrode plate of the capacitor, and the capacitance value of the capacitor formed by the pot and the electrode plate increases compared to the capacitor formed by the original upper electrode plate and the lower electrode plate; 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 whether the capacitance value changes.

[0040] The control method for preventing dry burning of a stove provided by the embodiment of the present disclosure is adopted to judge the material of the stove by detecting the conductivity of the stove, and further to make a secondary judgment on the material of the stove that does not have conductivity by measuring the capacitance value, so as to determine the anti-dry burning temperature for controlling the stove to stop heating according to the material of the stove. When the temperature of the stove is greater than the anti-dry burning temperature, the stove is controlled to stop heating to prevent the problem of dry burning. By performing capacitance detection on the stove that does not have conductivity, accurate material judgment is achieved, and the stoves of different materials can be accurately prevented from dry burning, effectively reducing the misjudgment rate of anti-dry burning.

[0041] Optionally, the first condition includes that the intensity of the feedback current in the conductivity detection result is within a first current intensity range; wherein the first current intensity range is determined according to the conductivity of the non-metallic material.

[0042] When the feedback current intensity of the conductivity detection result is within the first current intensity range, it is preliminarily determined that the material of the cookware is a non-metallic material;

[0043] When the feedback current intensity of the conductivity detection result is within the second current intensity range, it is preliminarily determined that the material of the cookware is metal.

[0044] The first current intensity interval refers to the critical range of the current intensity fed back in the test results when the conductivity of non-metallic materials is tested. The second current intensity interval refers to the critical range of the current intensity fed back in the test results when the conductivity of metal materials is tested. According to the properties of metal and non-metallic materials, the current intensity corresponding to the first current intensity interval is lower than the current intensity corresponding to the second current intensity interval.

[0045] Optionally, it is determined whether the feedback current intensity in the conductivity test result is within a first current intensity interval. When the feedback current intensity is within the first current intensity interval, the material of the pot is determined to be a non-metallic material; when it is not within the first current intensity interval, it is inferred that the material of the pot is a metal material. In other embodiments of the present application, it is also possible to determine whether the feedback current intensity is within a second current intensity interval based on the conductivity test result, and the material of the pot with a test result outside the interval is inferred to be a non-metallic material.

[0046] Optionally, based on the conductivity detection result of the cookware, when the conductivity of the cookware does not satisfy the first condition, an anti-dry-boiling operation corresponding to the metal cookware is performed.

[0047] In this way, a preliminary judgment of the material of the cookware is achieved based on the conductivity test result of the cookware. When the conductivity test result of the cookware meets the first condition, that is, when the feedback current of the conductivity test result is within the first intensity range, the material of the cookware is preliminarily judged to be non-metallic. When the test result is not within the first current intensity range, the cookware material is assumed to be metal, and the anti-dry-burning strategy corresponding to the metal material is executed.

[0048] Optionally, determining the material of the cookware according to the capacitance value includes: obtaining a capacitance difference between the capacitance value and the 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; when the capacitance difference is less than a preset capacitance difference, determining that the material of the cookware is a non-metallic material.

[0049] Here, 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.

[0050] In this way, by performing capacitance detection on the material of non-metallic cookware with conductivity detection results, a secondary judgment of the material of this part of the cookware can be achieved. This can avoid the large conductivity detection error caused by oil stains attached to the bottom of the pot due to long-term use, misjudging the metal cookware as non-metallic cookware, and applying the higher anti-dry-burning temperature corresponding to non-metallic cookware, causing the metal cookware to dry-burn.

[0051] 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 electrode plate of the capacitor, and the capacitance value of the capacitor formed by the pot and the electrode plate increases compared to the capacitor formed by the original upper electrode plate and the lower electrode plate; when the pot is made of non-metallic material, the pot cannot form a capacitor together with the electrode plate, and the capacitance value of the capacitor does not change. Therefore, it is possible to judge whether the pot is made of metal or non-metallic material based on the change in capacitance value.

[0052] 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 electrode plate of the capacitor, and relative to the capacitance constituted by the original upper electrode plate and the lower electrode plate, the capacitance value of the capacitor constituted by the cookware and the electrode plate is significantly increased, thus determining that the material of the cookware is metal.

[0053] 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.

[0054] In this way, the material of the cookware that meets the conductivity requirements of non-metallic materials can be secondary judged through the change in capacitance value. The judgment scheme is more accurate and can avoid material judgment errors caused by oil adhesion, which may lead to misjudgment when executing the anti-dry burning strategy.

[0055] Optionally, an anti-dry-burn operation corresponding to the material of the cookware is performed, including: obtaining the bottom temperature of the cookware and the anti-dry-burn temperature corresponding to the material of the cookware; when the bottom temperature is greater than or equal to the anti-dry-burn temperature, reducing the firepower.

[0056] When the conductivity test result of the cookware does not satisfy the first condition, or when the capacitance difference value obtained by the capacitance detection device of the cookware is greater than or equal to the preset capacitance difference value, the material of the cookware is metal, and the anti-dry-boiling temperature is the first set value;

[0057] When the conductivity test result of the cookware satisfies the first condition and the capacitance difference obtained by the capacitance detection device of the cookware is less than the preset capacitance difference, the material of the cookware is non-metallic material, and the anti-dry burning temperature is the second set value; wherein the first set value is less than the second set value.

[0058] Here, the first setting value is used to indicate the maximum temperature critical value of the temperature range in which a metal cookware can maintain a good use state during the cooking process; the second setting value is used to indicate the maximum temperature critical value of the temperature range in which a non-metal cookware can maintain a good use state during the cooking process. Here, a secondary judgment of the material of the cookware that meets the conductivity of the non-metallic material is performed based on the capacitance change value, so as to determine the threshold value that meets the cookware.

[0059] In this way, when the threshold is determined according to the material of the cookware, it is possible to set the anti-dry-burning threshold for metal cookware and non-metal cookware, and a default threshold can be set for anti-dry-burning for cookware of other materials.

[0060] Optionally, the above control method for preventing dry burning of the stove also includes: when the temperature of the pot reaches a third set value, controlling the stove to stop heating. The third set value is used to express the temperature at which some or all of the materials of the pot are at risk of dry burning. When the pot reaches this temperature, continuing to heat it may cause the pot to dry burn or even explode. Optionally, the third set value is greater than the above second set value; optionally, the third set value is assigned to 500 degrees. When the temperature of the pot is greater than 500 degrees, the stove is controlled to stop heating, which can prevent the pot from dry burning. In this way, when the anti-dry burning temperature cannot be set according to the material of the pot, the anti-dry burning protection of the pot is achieved by setting the third set value.

[0061] The control method for preventing dry burning of a stove provided by the embodiment of the present disclosure is adopted to judge the material of the stove by detecting the conductivity of the stove, and further to make a secondary judgment on the material of the stove that does not have conductivity by measuring the capacitance value, so as to determine the anti-dry burning temperature for controlling the stove to stop heating according to the material of the stove. When the temperature of the stove is greater than the anti-dry burning temperature, the stove is controlled to stop heating to prevent the problem of dry burning. By performing capacitance detection on the stove that does not have conductivity, accurate material judgment is achieved, and the stoves of different materials can be accurately prevented from dry burning, effectively reducing the misjudgment rate of anti-dry burning.

[0062] like Figure 3 As shown, a control method for preventing dry burning of a stove provided by an embodiment of the present disclosure includes:

[0063] Step S11, obtaining the conductivity test result of the cookware.

[0064] Step S12, when the conductivity of the cookware satisfies the first condition, the oscillation frequency of the oscillation circuit in which the capacitor is located is obtained; when the conductivity of the cookware does not satisfy the first condition, an anti-dry-burning operation corresponding to the metal cookware is performed.

[0065] An oscillation circuit is a circuit that can automatically convert direct current power into an alternating current signal with a certain amplitude and frequency without the need for an external signal. The oscillation circuit includes an amplifier, a positive feedback circuit, and a frequency selection network, wherein: the amplifier can amplify the input signal applied to the output end of the oscillation circuit so that the output signal maintains a constant value; the positive feedback circuit ensures that the feedback signal provided to the input end of the oscillation circuit is of the same phase; the frequency selection network only allows a certain frequency f0 to pass, so that the oscillation circuit produces 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.

[0066] 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 plate, 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 the oscillation frequency change and improving the accuracy of the oscillation frequency.

[0067] Optionally, performing data processing on the plurality of oscillation frequencies to obtain a processed oscillation frequency comprises:

[0068]

[0069] 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 of n =1.

[0070] 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.

[0071] Optionally, α n Positively correlated with n, that is, as the value of n increases, α n For example, when n=5, α1=0.1, α2=0.15, α3=0.2, α4=0.25, α5=0.3.

[0072] α 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.

[0073] 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.

[0074] Step S13, calculating the capacitance value according to the oscillation frequency.

[0075] 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 4 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 S0 connected in sequence, wherein: the inductor L and the capacitor C are respectively connected in parallel with the peripheral drive circuit; one end of the electrode plate S0 is connected to the peripheral drive circuit, and the other end is grounded.

[0076] Optionally, the capacitance value is calculated according to the oscillation frequency, including:

[0077]

[0078] Among them, C0 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, and f is the oscillation frequency.

[0079] 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 according to Formula 3 more accurate.

[0080] The material of the cookware is determined according to the capacitance value, and an anti-dry-boiling operation corresponding to the material of the cookware is performed.

[0081] Step S14, obtaining a capacitance difference between the capacitance value and the 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; when the capacitance difference is less than the preset capacitance difference, determining that the material of the cookware is a non-metal material.

[0082] Step S15, obtaining the bottom temperature of the pot and the anti-dry-burn temperature corresponding to the material of the pot; when the bottom temperature of the pot is greater than or equal to the anti-dry-burn temperature, reducing the firepower; when the bottom temperature of the pot is less than the anti-dry-burn temperature, continuing to maintain the original firepower operation and performing normal cooking work.

[0083] When the material of the cookware is metal, the anti-dry-burning temperature is a first setting value; when the material of the cookware is non-metallic, the anti-dry-burning temperature is a second setting value; wherein the first setting value is smaller than the second setting value.

[0084] The control method for preventing dry burning of a stove provided by the embodiment of the present disclosure is adopted to judge the material of the stove by detecting the conductivity of the stove, and further to make a secondary judgment on the material of the stove that does not have conductivity by measuring the capacitance value, so as to determine the anti-dry burning temperature for controlling the stove to stop heating according to the material of the stove. When the temperature of the stove is greater than the anti-dry burning temperature, the stove is controlled to stop heating to prevent the problem of dry burning. By performing capacitance detection on the stove that does not have conductivity, accurate material judgment is achieved, and the stoves of different materials can be accurately prevented from dry burning, effectively reducing the misjudgment rate of anti-dry burning.

[0085] Combination Figure 5 As shown, the embodiment of the present disclosure provides a control device for preventing dry burning of a stove, including a processor 100 and a memory 101. Optionally, the device may also include a communication interface 102 and a bus 103. The processor 100, the communication interface 102, and the memory 101 may communicate with each other through the bus 103. The communication interface 102 may be used for information transmission. The processor 100 may call the logic instructions in the memory 101 to execute the control method for preventing dry burning of a stove in the above embodiment.

[0086] In addition, the logic instructions in the memory 101 described above may be implemented in the form of software functional units and when sold or used as independent products, may be stored in a computer-readable storage medium.

[0087] The memory 101 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 100 executes the functional application and data processing by running the program instructions / modules stored in the memory 101, that is, the control method for preventing dry burning of the cooker in the above embodiment is implemented.

[0088] The memory 101 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 101 may include a high-speed random access memory and may also include a non-volatile memory.

[0089] The disclosed embodiment provides a stove, comprising the above-mentioned control device for preventing dry burning of the stove. Optionally, the stove can be an induction cooker or a gas stove. By setting the control device for preventing dry burning, the anti-dry burning strategy can be determined according to the temperature information and capacitance value of the pot placed on the stove for cooking, so as to control the stove to prevent the pot from dry burning, effectively improving the safety of the stove and reducing the misjudgment rate when preventing dry burning.

[0090] 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 control method for preventing dry-burning of a stove.

[0091] An embodiment of the present disclosure provides a computer program product, which includes a computer program stored on a computer-readable storage medium. The computer program includes program instructions. When the program instructions are executed by a computer, the computer executes the above-mentioned control method for preventing dry burning of a stove.

[0092] The computer-readable storage medium mentioned above may be a transient computer-readable storage medium or a non-transitory computer-readable storage medium.

[0093] 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 causing a computer device (which may be a personal computer, a server, or a network device, etc.) to execute all or part of the steps of the method of 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, Read-Only Memory), a random access memory (RAM, Random Access Memory), a disk or an optical disk, and other media that can store program codes, or a transient storage medium.

[0094] 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, separate 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. 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 the claims, unless the context clearly indicates, the singular forms of "a", "an" and "the" are intended to include plural forms as well. Similarly, the term "and / or" as used in this application refers to any and all possible combinations of listings containing one or more associated ones. In addition, when used in the present 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 thereof. In the absence of further restrictions, the elements defined by the sentence "comprising a ..." do not exclude the presence of other identical elements in the process, method or device comprising the elements. In this article, each embodiment may focus on the differences from other embodiments, and the same and similar parts between the various 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.

[0095] 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.

[0096] 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.

[0097] 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 cooking appliance, comprising a contact portion, characterized in that: Also includes: a conductivity detection device, disposed on the contact portion and configured to detect the conductivity of the pot placed on the contact portion; a capacitance detection device, disposed on the contact portion and configured to contact the pot placed on the contact portion; Wherein, the capacitance detection device comprises: electrode plates, including an upper electrode plate and a lower electrode plate, the upper electrode plate is in contact with the pot, and the area of ​​the upper electrode plate is smaller than that of the lower electrode plate; The capacitance detection circuit is used to detect the capacitance value of the capacitor formed by the upper electrode plate and the lower electrode plate, and / or to detect the capacitance value of the capacitor formed by the lower electrode plate and the cookware.

2. A control method for preventing dry burning of the stove according to claim 1, characterized in that: include: Get the conductivity test results of the cookware; When the conductivity of the cookware does not satisfy the first condition, performing an anti-dry-burning operation corresponding to a cookware made of metal material; When the conductivity of the cookware satisfies the first condition, obtaining a capacitance value detected by a capacitance detection device; The capacitance value is obtained according to the oscillation frequency of the oscillation circuit in which the capacitance is located; the first condition includes: the intensity of the feedback current of the conductivity detection result is within a first current intensity range; wherein the first current intensity range is determined according to the conductivity of the non-metallic material; 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 metal; When the capacitance difference is less than a preset capacitance difference, determining that the material of the cookware is a non-metallic material; Execute the anti-dry-boiling operation corresponding to the material of the cookware; The calculation of the oscillation frequency includes: 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 of n =1.

3. The method according to claim 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, reduce the fire power.

4. The method according to claim 2, characterized in that: When the cookware is made of metal, the anti-dry-burning temperature is a first set value; When the material of the cookware is non-metallic, the anti-dry-burning temperature is a second set value; The first setting value is smaller than the second setting value.

5. A control device for preventing dry burning of a stove, comprising a processor and a memory storing program instructions, characterized in that: The processor is configured to execute the control method for preventing dry burning of a cooker according to any one of claims 2 to 4 when executing the program instructions.

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