CN114251682A - Stove and control method and control device for preventing dry burning of stove - Google Patents
Stove and control method and control device for preventing dry burning of stove Download PDFInfo
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- CN114251682A CN114251682A CN202011014978.5A CN202011014978A CN114251682A CN 114251682 A CN114251682 A CN 114251682A CN 202011014978 A CN202011014978 A CN 202011014978A CN 114251682 A CN114251682 A CN 114251682A
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- 238000000034 method Methods 0.000 title claims description 46
- 239000000463 material Substances 0.000 claims abstract description 82
- 238000001514 detection method Methods 0.000 claims abstract description 55
- 238000010411 cooking Methods 0.000 claims abstract description 17
- 230000010355 oscillation Effects 0.000 claims description 54
- 230000002265 prevention Effects 0.000 claims description 42
- 239000003990 capacitor Substances 0.000 claims description 31
- 239000007769 metal material Substances 0.000 claims description 22
- 229910052755 nonmetal Inorganic materials 0.000 claims description 22
- 239000002184 metal Substances 0.000 claims description 18
- 238000010438 heat treatment Methods 0.000 abstract description 27
- 238000009841 combustion method Methods 0.000 abstract description 17
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- 238000004891 communication Methods 0.000 description 6
- 230000006870 function Effects 0.000 description 6
- 238000012360 testing method Methods 0.000 description 5
- 238000004590 computer program Methods 0.000 description 4
- 230000001276 controlling effect Effects 0.000 description 4
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24C—DOMESTIC STOVES OR RANGES ; DETAILS OF DOMESTIC STOVES OR RANGES, OF GENERAL APPLICATION
- F24C3/00—Stoves or ranges for gaseous fuels
- F24C3/12—Arrangement or mounting of control or safety devices
- F24C3/126—Arrangement or mounting of control or safety devices on ranges
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Abstract
The application relates to the technical field of intelligent household appliances and discloses a stove. The cooker comprises a contact part, a conductivity detection device and a capacitance detection device, wherein the conductivity detection device is arranged on the contact part and is configured to detect the conductivity of a cooker placed on the contact part; the capacitance detection device is disposed at the contact portion and configured to be in contact with a pot placed on the contact portion. Through set up contact site and electric conductivity detection device, electric capacity detection device on cooking utensils, realize judging the pan material according to the electric conductivity of pan to under the condition that the pan electric conductivity accords with non-metallic pan material, confirm the dry combustion method temperature of preventing that controls cooking utensils stop heating according to the material of pan, realized accurate material and judged, in order to carry out accurate dry combustion method to different material pans, the effectual erroneous judgement rate of preventing dry combustion method that has reduced.
Description
Technical Field
The application relates to the technical field of intelligent household appliances, for example to a stove, and a control method and a control device for preventing dry burning of the stove.
Background
The dry heating refers to heating an empty pot for a long time, the pot is dried and burnt due to overlong heating time, the safety hazard that the pot is often found in a kitchen is caused, the pot is discolored and deformed due to the dry heating, and a fire disaster can be caused in serious cases. At present, the common dry burning prevention function in the household cooker realizes the dry burning prevention control on the cooker by automatically closing the cooker when the cooker reaches a set threshold value, and plays a role in protecting the cooker.
In the process of implementing the embodiments of the present disclosure, it is found that at least the following problems exist in the related art:
in the related art, the material of the cookware is judged by detecting the conductivity of the cookware, so that the dry burning prevention strategy corresponding to the material of the cookware is executed. However, for some cookware with long service time, a large amount of oil stains may be attached to the bottom of the cookware during use, so that when the cookware is subjected to conductivity detection, misdetection is easy to occur, misjudgment is made on the material of the cookware, and when anti-dry heating control corresponding to the material is executed, misjudgment is made, and the anti-dry heating effect is limited.
Disclosure of Invention
The embodiment of the disclosure provides a cooker, and a method and a device for preventing dry burning of the cooker, so as to solve the technical problems that in the related art, when dry burning prevention control is performed on a cooker only through temperature information, the error is large, and the dry burning prevention effect is limited.
In some embodiments, the cooktop includes a contact portion, further comprising: a conductivity detection device provided to the contact portion and configured to detect conductivity of a pot placed on the contact portion; and the capacitance detection device is arranged on the contact part and is configured to be in contact with a cooker placed on the contact part.
In some embodiments, the control method for preventing dry burning of the cooker comprises the following steps: obtaining a pot conductivity detection result; under the condition that the conductivity of the cookware meets a first condition, acquiring a capacitance value detected by a capacitance detection device; and determining the material of the cookware according to the capacitance value, and executing dry-burning prevention operation corresponding to the material of the cookware.
In some embodiments, the control device for preventing dry-heating of the cooking appliance comprises a processor and a memory storing program instructions, wherein the processor is configured to execute the control method for preventing dry-heating of the cooking appliance when executing the program instructions.
The stove, the control method and the control device for preventing dry burning of the stove provided by the embodiment of the disclosure can realize the following technical effects:
through set up contact site and electric conductivity detection device on cooking utensils, electric capacity detection device, detect the electrically conductive condition of the pan of placing in cooking utensils and adding, and/or, the electric capacity situation of change, thereby realize judging the pan material according to the electric conductivity of pan, and under the condition that pan electric conductivity accords with non-metallic pan material, carry out the secondary according to the capacitance value situation of change of pan to the material of pan and judge, and confirm the dry combustion method temperature that control cooking utensils stop heating according to the material of pan, when the temperature of pan is greater than dry combustion method temperature, control cooking utensils stop heating in order to prevent the dry combustion method problem. Through carrying out the electric capacity to the pan that does not possess electric conductivity and detecting, realized accurate material and judged to carry out accurate dry combustion method to different material pans, effectual reduced prevent dry combustion method's misjudgement rate.
The foregoing general description and the following description are exemplary and explanatory only and are not restrictive of the application.
Drawings
One or more embodiments are illustrated by way of example in the accompanying drawings, which correspond to the accompanying drawings and not in limitation thereof, in which elements having the same reference numeral designations are considered to be similar elements, and in which:
FIG. 1 is a schematic view of a cooktop provided by embodiments of the present disclosure;
FIG. 2 is a schematic diagram of a control method for preventing dry burning of a cooker according to an embodiment of the disclosure;
FIG. 3 is a schematic diagram of a control method for preventing dry burning of a cooker according to an embodiment of the disclosure;
FIG. 4 is a schematic diagram of an oscillating circuit according to an embodiment of the present disclosure;
fig. 5 is a schematic diagram of a control device for preventing dry burning of a cooker according to an embodiment of the disclosure.
Detailed Description
So that the manner in which the features and elements of the disclosed embodiments can be understood in detail, a more particular description of the disclosed embodiments, briefly summarized above, may be had by reference to the embodiments, some of which are illustrated in the appended drawings. In the following description of the technology, for purposes of explanation, numerous details are set forth in order to provide a thorough understanding of the disclosed embodiments. However, one or more embodiments may be practiced without these details. In other instances, well-known structures and devices may be shown in simplified form in order to simplify the drawing.
The terms "first," "second," and the like in the description and in the claims, and the above-described drawings of embodiments of the present disclosure, are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It should be understood that the data so used may be interchanged under appropriate circumstances such that embodiments of the present disclosure described herein may be made. Furthermore, the terms "comprising" and "having," as well as any variations thereof, are intended to cover non-exclusive inclusions.
The term "plurality" means two or more unless otherwise specified.
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 represents: a or B.
The term "and/or" is an associative relationship that describes objects, meaning that three relationships may exist. For example, a and/or B, represents: a or B, or A and B.
Fig. 1 is a schematic structural diagram of a cooker provided in an embodiment of the present disclosure. As shown in fig. 1, the cooker includes a contact portion 1, a conductivity detection device 2, and a capacitance detection device 3. The contact part 1 is used for supporting and contacting a pot placed on the cooker, and the conductivity detection device 2 is used for detecting the conductivity of the pot placed on the contact part 1; the capacitance detection device 3 is in contact with a pot placed on the contact part 1 to detect the capacitance condition.
The contact part 1 may be a part of the cooker itself, such as a burner, a fire cover, or a detachable part of the cooker, such as a stove rack, a pot rack support, or the like.
The conductivity detection device 2 may be a device capable of detecting conductivity, such as an electrode contact or a conductivity detector. The pot is arranged on the contact part 1 through a connecting piece so as to realize the conductivity detection of the pot placed on the contact part. Generally, the electric conductivity of the cookware is different according to the material of the cookware, and the electric conductivity detection device 2 is used for carrying out contact type electric conductivity detection on the cookware, and the obtained electric conductivity detection result is related to the material of the cookware.
The capacitance detection device 3 may be a capacitance detector, a capacitive sensor, or the like. Is mounted on the contact part 1 through a connecting piece to realize the measurement of capacitance change in the contact process of the cookware on the contact part 1.
Alternatively, the capacitance detection device 3 includes an electrode plate and a capacitance detection circuit. The electrode plate comprises an upper electrode plate and a lower electrode plate, and the upper electrode plate is in contact with the pot; and the capacitance detection circuit is used for detecting the capacitance value of the capacitor formed by the upper electrode plate and the lower electrode plate and/or detecting the capacitance value of the capacitor formed by the lower electrode plate and the cooker.
Here, the upper electrode plate and the lower electrode plate are arranged in parallel to constitute a parallel plate capacitor. The capacitance value of the parallel plate capacitor is obtained as follows:
wherein C is the capacitance value of the parallel plate capacitor, epsilon is the dielectric constant (relative dielectric constant), k is the constant of electrostatic force, S is the opposite area of the two polar plates, and d is the vertical distance between the two polar plates.
As can be seen from the equation (1), the capacitance C of the parallel plate capacitor is positively correlated with the area S directly facing the two plates when the vertical distance d between the two plates is constant. Specifically, in this 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 cookware is placed on the contact part 1, the upper electrode plate is in contact with the cookware, under the condition that the cookware is made of metal cookware, the cookware and the original upper electrode plate jointly form the upper electrode plate of the capacitor, and the projected area of the cookware on the lower electrode plate is increased, so that the area of the upper electrode plate opposite to the lower electrode plate is increased, and the capacitance value is changed according to the formula (1). Under the condition that the pot material is a non-metal pot, the pot does not form a passage after contacting with the upper electrode plate, so that the capacitance value cannot be changed.
By adopting the cooker provided by the embodiment of the disclosure, the contact part, the electric conductivity detection device 2 and the electric capacitance detection device 3 are arranged on the cooker, the electric conductivity condition of a cooker arranged on the cooker and/or the electric capacitance change condition are/is detected, so that the material of the cooker is judged according to the electric conductivity of the cooker and/or the electric capacitance change condition, and the dry-burning prevention temperature for stopping heating of the cooker is determined and controlled according to the material of the cooker, so that the dry-burning prevention problem is prevented. The dry burning prevention device has the advantages that the accurate dry burning prevention is realized for pots made of different materials, and the false judgment rate of the dry burning prevention is effectively reduced.
Fig. 2 is a schematic flow chart of a control method for preventing dry burning of a cooker provided by an embodiment of the disclosure. The control method for preventing dry burning of the kitchen range is applied to the kitchen range shown in figure 1, and comprises the following steps of, in combination with the control method shown in figure 2:
step S01, obtaining a pot conductivity detection result.
Here, the result of detecting the conductivity of the pot means that the conductivity of the pot is detected when the conductivity detecting means provided on the cooker contact portion of the cooker contacts the pot, and the conductivity is different depending on the material of the pot, and thus the result of detecting the conductivity is related to the material of the pot.
In step S02, the capacitance value detected by the capacitance detection device is obtained when the conductivity of the pot satisfies the first condition.
Here, the first condition is used for expressing a control condition related to the material of the cookware, and is used for judging the material of the cookware when the conductivity of the cookware meets the control condition, so as to determine different dry-burning prevention strategies according to the material of the cookware, and prevent the dry-burning problem. So, can realize the preliminary judgement to the pan material according to the electric conductivity testing result of pan. Because the cookers made of different materials have different dry burning prevention threshold values, accurate dry burning prevention of cookers in different cooking states is realized according to material information, the judgment method is simplified, and meanwhile the false judgment rate of dry burning prevention is effectively reduced.
Step S03, determining the material of the pot according to the capacitance value, and executing the anti-dry operation corresponding to the material of the pot.
Since the electrode plates constituting the capacitor store and discharge electric charges during operation, the electrode plates need to have conductivity. When the pot is made of metal, the pot and the original upper electrode plate jointly form an upper electrode plate of the capacitor, and the capacitance value of the capacitor formed by the pot and the electrode plate is increased relative to the capacitor formed by the original upper electrode plate and the original lower electrode plate; when the pan material is the non-metallic material, the pan does not satisfy the electrically conductive condition of plate electrode, consequently does not constitute electric capacity jointly with the plate electrode, also does not change the capacitance value of electric capacity. Therefore, the material of the cookware can be judged to be metal or nonmetal according to whether the capacitance value changes.
By adopting the control method for preventing dry burning of the cooker, provided by the embodiment of the disclosure, the material of the cooker is judged by detecting the conductivity of the cooker, the material of the cooker is secondarily judged by further measuring the capacitance value, the dry burning prevention temperature for controlling the cooker to stop heating is determined according to the material of the cooker, and when the temperature of the cooker is higher than the dry burning prevention temperature, the cooker is controlled to stop heating to prevent the dry burning problem. Through carrying out the electric capacity to the pan that does not possess electric conductivity and detecting, realized accurate material and judged, can carry out accurate dry combustion method to different material pans, effectual reduction prevents the false rate of dry combustion method.
Optionally, the first condition includes that the intensity of the feedback current in the conductivity detection result is within a first current intensity interval; the first current intensity interval is determined according to the conductivity of the nonmetal material.
Under the condition that the feedback current intensity of the conductivity detection result is within the first current intensity interval, preliminarily judging that the cookware is made of a non-metal material;
and under the condition that the feedback current intensity of the conductivity detection result is within the second current intensity interval, preliminarily judging that the cookware is made of metal.
The first current intensity interval refers to a critical range of feedback current intensity in a detection result when the non-metallic material is used for detecting the conductivity. The second current intensity interval is a critical range of the feedback current intensity in the detection result when the conductive property of the metal material is detected. According to the properties of the metal and the nonmetal material, the current intensity corresponding to the first current intensity interval is lower than the current intensity corresponding to the second current intensity interval.
Optionally, judging whether the feedback current intensity in the conductivity detection result is within a first current intensity interval, and determining that the cookware is made of a non-metal material when the feedback current intensity is within the first current intensity interval; when the pot is not within the first current intensity range, the pot is deduced to be made of metal. In other embodiments of the present application, it may also be determined whether the feedback current intensity is within the second current intensity interval according to the conductivity detection result, and the pot material outside the interval is inferred to be a non-metal material.
Optionally, according to the detection result of the conductivity of the cookware, if the conductivity of the cookware does not meet the first condition, the anti-dry heating operation corresponding to the metal cookware is executed.
So, according to the electric conductivity testing result of pan, realize the preliminary judgement to the pan material, under the condition that the electric conductivity testing result of pan satisfies first condition, when the feedback current of electric conductivity testing result was within first intensity interval promptly, the material of preliminary judgement pan was the non-metallic material. When the detection result is not in the first current intensity interval, the default pot material is a metal material, and an anti-dry heating strategy corresponding to the metal material is executed.
Optionally, confirm the pan material according to the capacitance value, include: obtaining a capacitance difference value between the capacitance value and the initial capacitance value; determining that the cookware is made of a metal material under the condition that the capacitance difference value is greater than or equal to a preset capacitance difference value; and under the condition that the capacitance difference value is smaller than the preset capacitance difference value, determining that the cookware is made of a non-metal material.
Here, a skilled person in the art can determine the preset capacitance difference value according to the previous experimental data, so that the preset capacitance difference value can accurately reflect the change of the capacitance value of the metal cookware brought on the basis of the initial capacitance value, and further the judgment result of the cookware material is more accurate.
Therefore, the secondary judgment of the material of the part of cookware is realized by carrying out capacitance detection on the material of the nonmetal cookware with the conductivity detection result. The phenomenon that oil stains are attached to the bottom of the cooker due to long-time use, the electric conductivity detection error is large, the metal cooker is mistakenly judged to be a non-metal cooker, and the high dry-burning preventing temperature corresponding to the non-metal cooker is executed, so that the metal cooker is dried.
Since the electrode plates constituting the capacitor store and discharge electric charges during operation, the electrode plates need to have conductivity. When the pot is made of metal, the pot and the original upper electrode plate jointly form an upper electrode plate of the capacitor, and the capacitance value of the capacitor formed by the pot and the electrode plate is increased relative to the capacitor formed by the original upper electrode plate and the original lower electrode plate; when the pan material is non-metallic material, the pan can't form electric capacity together with the plate electrode, also does not change the capacitance value of electric capacity. Therefore, the material of the cookware can be judged to be metal or nonmetal according to the change of the capacitance value.
Under the condition that the capacitance difference value is larger than or equal to the preset capacitance difference value, the cookware and the original upper electrode plate jointly form an upper electrode plate of the capacitor, and compared with the capacitor formed by the original upper electrode plate and the original lower electrode plate, the capacitance value of the capacitor formed by the cookware and the electrode plates is obviously increased, so that the cookware is determined to be made of metal.
Under the condition that the capacitance difference value is smaller than the preset capacitance difference value, the cookware does not meet the conductive condition of the electrode plate, so that the cookware does not form a capacitor together with the electrode plate, and the capacitance value of the capacitor is not obviously changed, so that the cookware is determined to be made of a non-metal material.
Therefore, the cookware with the conductivity meeting the requirements of nonmetal materials is subjected to secondary material judgment through the change of the capacitance value, the judgment scheme is more accurate, and the material judgment error caused by oil stain adhesion can be avoided, so that the false judgment is caused when the dry burning prevention strategy is executed.
Optionally, carry out the operation of preventing dry combustion method corresponding with the pan material, include: obtaining the temperature of the bottom of the pot and the dry burning prevention temperature corresponding to the material of the pot; when the temperature of the pot bottom is higher than or equal to the dry burning prevention temperature, the fire power is reduced.
Under the condition that the conductivity detection result of the cookware does not meet a first condition, or under the condition that the capacitance difference value acquired by a capacitance detection device of the cookware is greater than or equal to a preset capacitance difference value, the cookware is made of a metal material, and the dry burning prevention temperature is a first set value;
under the condition that the conductivity detection result of the cookware meets a first condition and the capacitance difference value acquired by the capacitance detection device of the cookware is smaller than a preset capacitance difference value, the cookware is made of a non-metal material, and the dry burning prevention temperature is a second set value; wherein the first set value is smaller than the second set value.
Here, the first set value is used to represent a maximum temperature critical value of a temperature range in which the metal cookware can maintain a better use state during cooking; the second set value is used for representing the maximum temperature critical value of the temperature range of the non-metallic cookware which can maintain a better use state in the cooking process. The material is secondarily judged by the cookware with the conductivity conforming to the nonmetal material according to the capacitance change value, so that the threshold value conforming to the cookware is determined.
So, when confirming the threshold value according to the material of pan, can realize carrying out the settlement of preventing dry combustion method threshold value to metal pan and non-metal pan, can set for acquiescence threshold value to other material pans and prevent dry combustion method.
Optionally, the above control method for preventing dry-heating of the cooking stove further includes: and when the temperature of the cooker reaches a third set value, controlling the cooker to stop heating. The third setting value is used for expressing the temperature of the cookware made of partial or all materials which is dangerous to dry heat, and when the cookware reaches the temperature, the cookware is heated continuously and may be dry-heated or even exploded. Optionally, the third setting value is greater than the second setting value; optionally, the third set value is assigned to 500 degrees, and when the temperature of the pot is higher than 500 degrees, the cooker is controlled to stop heating, so that the pot can be prevented from being burnt. Therefore, the dry-burning prevention protection of the cookware can be realized by setting the third set value under the condition that the dry-burning prevention temperature setting can not be carried out according to the cookware material.
By adopting the control method for preventing dry burning of the cooker, provided by the embodiment of the disclosure, the material of the cooker is judged by detecting the conductivity of the cooker, the material of the cooker is secondarily judged by further measuring the capacitance value, the dry burning prevention temperature for controlling the cooker to stop heating is determined according to the material of the cooker, and when the temperature of the cooker is higher than the dry burning prevention temperature, the cooker is controlled to stop heating to prevent the dry burning problem. Through carrying out the electric capacity to the pan that does not possess electric conductivity and detecting, realized accurate material and judged, can carry out accurate dry combustion method to different material pans, effectual reduction prevents the false rate of dry combustion method.
As shown in fig. 3, a control method for preventing dry-heating of a cooker provided by the embodiment of the present disclosure includes:
step S11, obtaining a pot conductivity detection result.
Step S12, acquiring the oscillation frequency of the oscillation circuit where the capacitor is located under the condition that the conductivity of the cookware meets the first condition; and executing dry burning prevention operation corresponding to the metal pot under the condition that the conductivity of the pot does not meet the first condition.
The oscillating circuit is a circuit which can automatically convert direct current electric energy into an alternating current signal with certain amplitude and certain frequency without an external signal. The oscillating circuit comprises an amplifier, a positive feedback circuit and a frequency selection network, wherein: the amplifier can amplify the input signal applied by the output end of the oscillating circuit to keep the output signal at a constant value; the positive feedback circuit ensures that feedback signals provided to the input end of the oscillating circuit are in the same phase; frequency-selective networks allowing only a certain frequency f0Can pass through, thereby enabling the oscillating circuit to generate an output of a single frequency. According to the embodiment of the disclosure, the capacitance value of the capacitor is obtained through indirect calculation by obtaining the oscillation frequency of the oscillation circuit, and the obtaining mode is simpler and more flexible.
Optionally, obtaining an oscillation frequency of an oscillation circuit in which the capacitor is located includes: obtaining a plurality of oscillation frequencies detected in a preset time period; performing data processing on the plurality of oscillation frequencies to obtain processed oscillation frequencies; the processed oscillation frequency is taken as the oscillation frequency. The preset time period is a preset time period (for example, the previous 3 minutes) before the current time. When other objects are present on the electrode plate, the oscillation frequency of the oscillation circuit is affected (e.g., food debris falls off the lower electrode plate). In order to reduce the influence of the accidental event on the acquired oscillation frequency, a plurality of oscillation frequencies are acquired in a preset time period, and data processing is performed on the plurality of oscillation frequencies to obtain the final oscillation frequency, so that the accidental change of the oscillation frequency is reduced, and the accuracy of the oscillation frequency is improved.
Optionally, the data processing the plurality of oscillation frequencies to obtain processed oscillation frequencies includes:
wherein the content of the first and second substances,
n is the number of oscillation frequencies detected in a preset time period, fnFor the nth oscillation frequency, alpha, detected within a predetermined time periodnIs fnA weighting coefficient of1+…+αn＝1。
In this way, the weighted average processing is performed on the plurality of oscillation frequencies detected within the preset time period to obtain the weighted average oscillation frequency (processed oscillation frequency), and the weighted average oscillation frequency is used as the final oscillation frequency of the oscillation circuit, so that the influence of accidental factors can be reduced, and the accuracy of the oscillation frequency acquisition mode of the oscillation circuit can be improved.
Alternatively, αnPositively correlated with n, i.e. as the value of n increases, αnThe value of (a) is increased. For example, when n is 5, α1＝0.1，α2＝0.15，α3＝0.2，α4＝0.25，α5＝0.3。
αnFor the nth oscillation frequency f detected in a preset time periodnA weighting coefficient ofnPositively correlated with n, indicating fnThe closer the detection time of (2) is to the current time, the larger the weighting coefficient thereof. Thus, the weighted average oscillation frequency can be more representative of the oscillation frequency of the oscillation circuit at the current moment.
Optionally, the data processing the plurality of oscillation frequencies to obtain processed oscillation frequencies includes: obtaining an average oscillation frequency of a plurality of oscillation frequencies; calculating an oscillation frequency difference value between the plurality of oscillation frequencies and the average oscillation frequency; and taking the oscillation frequency with the minimum oscillation frequency difference in the plurality of oscillation frequencies as the processed oscillation frequency. Therefore, the influence of accidental factors can be reduced, and the accuracy of the oscillation frequency acquisition mode of the oscillation circuit can be improved.
In step S13, a capacitance value is calculated from the oscillation frequency.
In the embodiment of the disclosure, an LC oscillation circuit is adopted for oscillationAnd obtaining the frequency, namely forming a frequency selection network of the oscillating circuit by using an inductor L and a capacitor C. Referring to fig. 4, the oscillating circuit includes a peripheral driving circuit (including an amplifier and a positive feedback circuit), an inductor L, a capacitor C, and an electrode plate S, which are connected in sequence0Wherein: the inductor L and the capacitor C are respectively connected with the peripheral driving circuit in parallel; electrode plate S0One end is connected with the peripheral driving circuit, and the other end is grounded.
Optionally, calculating the capacitance value from the oscillation frequency comprises:
wherein, C0The pot and the electrode plate form a capacitance value of a capacitor, L is an inductance value of an inductor L in the oscillating circuit, and f is an oscillating frequency.
LC oscillating circuit's oscillating frequency range is wide, and easy oscillation starts, and the capacitance value of the electric capacity that pan and plate electrode constitute changes, and oscillating frequency f can correspondingly take place great change, and the testing result is more accurate, and then makes according to formula 3, and the capacitance value that obtains through the oscillating frequency calculation is more accurate.
And determining the material of the cookware according to the capacitance value, and executing dry-burning prevention operation corresponding to the material of the cookware.
Step S14, obtaining a capacitance difference between the capacitance value and the initial capacitance value; determining that the cookware is made of a metal material under the condition that the capacitance difference value is greater than or equal to a preset capacitance difference value; and under the condition that the capacitance difference value is smaller than the preset capacitance difference value, determining that the cookware is made of a non-metal material.
Step S15, obtaining the temperature of the bottom of the pot and the dry burning prevention temperature corresponding to the material of the pot; under the condition that the temperature of the pot bottom is more than or equal to the dry burning prevention temperature, the firepower is reduced; and under the condition that the temperature of the pot bottom is lower than the dry-burning prevention temperature, the original firepower operation is continuously maintained, and the normal cooking work is executed.
Under the condition that the pot is made of metal, the dry burning prevention temperature is a first set value; under the condition that the pot is made of non-metal materials, the dry burning prevention temperature is a second set value; wherein the first set value is smaller than the second set value.
By adopting the control method for preventing dry burning of the cooker, provided by the embodiment of the disclosure, the material of the cooker is judged by detecting the conductivity of the cooker, the material of the cooker is secondarily judged by further measuring the capacitance value, the dry burning prevention temperature for controlling the cooker to stop heating is determined according to the material of the cooker, and when the temperature of the cooker is higher than the dry burning prevention temperature, the cooker is controlled to stop heating to prevent the dry burning problem. Through carrying out the electric capacity to the pan that does not possess electric conductivity and detecting, realized accurate material and judged, can carry out accurate dry combustion method to different material pans, effectual reduction prevents the false rate of dry combustion method.
Referring to fig. 5, an embodiment of the present disclosure provides a control device for preventing dry-burning of a cooker, including a processor (processor)100 and a memory (memory) 101. Optionally, the apparatus may also include a Communication Interface (Communication Interface)102 and a bus 103. The processor 100, the communication interface 102, and the memory 101 may communicate with each other via a bus 103. The communication interface 102 may be used for information transfer. The processor 100 may call logic instructions in the memory 101 to execute the control method for preventing dry burning of the cooking appliance of the above embodiment.
In addition, the logic instructions in the memory 101 may be implemented in the form of software functional units and stored in a computer readable storage medium when the logic instructions are sold or used as independent products.
The memory 101, which is a computer-readable storage medium, may be used for storing software programs, computer-executable programs, such as program instructions/modules corresponding to the methods in the embodiments of the present disclosure. The processor 100 executes functional applications and data processing by operating program instructions/modules stored in the memory 101, that is, implements the control method for preventing dry burning of the cooking appliance in the above embodiments.
The memory 101 may include a storage program area and a storage data area, wherein the storage program area may store an operating system, an application program required for at least one function; the storage data area may store data created according to the use of the terminal device, and the like. In addition, the memory 101 may include a high-speed random access memory, and may also include a nonvolatile memory.
The embodiment of the disclosure provides a stove, which comprises the control device for preventing dry burning of the stove. Optionally, the cooker can be an induction cooker or a gas stove, and the anti-dry heating strategy can be determined according to the temperature information and the capacitance value of a cooker placed on the cooker for cooking through the arrangement of the control device for anti-dry heating, so that the cooker is controlled, the cooker is prevented from being dried, the use safety of the cooker is effectively improved, and the misjudgment rate of the cooker during the anti-dry heating is reduced.
The embodiment of the disclosure provides a computer-readable storage medium, which stores computer-executable instructions configured to execute the above control method for preventing dry burning of a cooker.
The embodiment of the disclosure provides a computer program product, which comprises a computer program stored on a computer readable storage medium, wherein the computer program comprises program instructions, and when the program instructions are executed by a computer, the computer executes the control method for preventing the dry burning of the cooker.
The computer-readable storage medium described above may be a transitory computer-readable storage medium or a non-transitory computer-readable storage medium.
The technical solution of the embodiments of the present disclosure may 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) to execute all or part of the steps of the method of the embodiments of the present disclosure. And the aforementioned storage medium may be a non-transitory storage medium comprising: a U-disk, a removable hard disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk or an optical disk, and other various media capable of storing program codes, and may also be a transient storage medium.
The above description and drawings sufficiently illustrate embodiments of the disclosure to enable those skilled in the art to practice them. Other embodiments may incorporate structural, logical, electrical, process, and other changes. The examples merely typify possible variations. Individual components and functions are optional unless explicitly required, and the sequence of operations may vary. Portions and features of some embodiments may be included in or substituted for those of others. Furthermore, the words used in the specification are words of description only and are not intended to limit the claims. As used in the description of the embodiments and the claims, the singular forms "a", "an" and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. Similarly, the term "and/or" as used in this application is meant to encompass any and all possible combinations of one or more of the associated listed. Furthermore, the terms "comprises" and/or "comprising," when used in this application, specify the presence of stated features, integers, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and/or groups thereof. Without further limitation, an element defined by the phrase "comprising an …" does not exclude the presence of other like elements in a process, method or apparatus that comprises the element. In this document, each embodiment may be described with emphasis on differences from other embodiments, and the same and similar parts between the respective embodiments may be referred to each other. For methods, products, etc. of the embodiment disclosures, reference may be made to the description of the method section for relevance if it corresponds to the method section of the embodiment disclosure.
Those of skill in the art would appreciate that the various illustrative elements and algorithm steps described in connection with the embodiments disclosed herein may be implemented as electronic hardware or combinations of computer software and electronic hardware. Whether such functionality is implemented as hardware or software may depend upon the particular application and design constraints imposed on the solution. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the disclosed embodiments. It can be clearly understood by the skilled person that, for convenience and brevity of description, the specific working processes of the system, the apparatus and the unit described above may refer to the corresponding processes in the foregoing method embodiments, and are not described herein again.
In the embodiments disclosed herein, the disclosed methods, products (including but not limited to devices, apparatuses, etc.) may be implemented in other ways. For example, the above-described apparatus embodiments are merely illustrative, and for example, the division of the units may be merely a logical division, and in actual implementation, there may be another division, for example, multiple units or components may be combined or integrated into another system, or some features may be omitted, or not executed. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection through some interfaces, devices or units, and may be in an electrical, mechanical or other form. The units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the units can be selected according to actual needs to implement the present embodiment. In addition, functional units in the embodiments of the present disclosure may be integrated into one processing unit, or each unit may exist alone physically, or two or more units are integrated into one unit.
The flowchart and block diagrams in the figures illustrate the architecture, functionality, and operation of possible implementations of systems, methods and computer program products according to embodiments of the present disclosure. In this regard, each block in the flowchart or block diagrams may represent a module, segment, or portion of code, which comprises one or more executable instructions for implementing the specified logical function(s). In some alternative implementations, the functions noted in the block may occur out of the order noted in the figures. For example, two blocks shown in succession may, in fact, be executed substantially concurrently, or the blocks may sometimes be executed in the reverse order, depending upon the functionality involved. In the description corresponding to the flowcharts and block diagrams in the figures, operations or steps corresponding to different blocks may also occur in different orders than disclosed in the description, and sometimes there is no specific order between the different operations or steps. For example, two sequential operations or steps may in fact be executed substantially concurrently, or they may sometimes be executed in the reverse order, depending upon the functionality involved. Each block of the block diagrams and/or flowchart illustrations, and combinations of blocks in the block diagrams and/or flowchart illustrations, can be implemented by special purpose hardware-based systems that perform the specified functions or acts, or combinations of special purpose hardware and computer instructions.
Claims (10)
1. A cooking utensils, includes the contact site, its characterized in that still includes:
a conductivity detection device provided to the contact portion and configured to detect conductivity of a pot placed on the contact portion;
and the capacitance detection device is arranged on the contact part and is configured to be in contact with a cooker placed on the contact part.
2. Hob according to claim 1, characterized in that the capacitance detection means comprise:
the electrode plate comprises an upper electrode plate and a lower electrode plate, and the upper electrode plate is in contact with the pot;
and the capacitance detection circuit is used for detecting the capacitance value of the capacitor formed by the upper electrode plate and the lower electrode plate and/or detecting the capacitance value of the capacitor formed by the lower electrode plate and the cooker.
3. A control method for preventing dry burning of the cooker as claimed in claim 1 or 2, which is characterized by comprising the following steps:
obtaining a pot conductivity detection result;
under the condition that the conductivity of the cookware meets a first condition, acquiring a capacitance value detected by a capacitance detection device;
and determining the material of the cookware according to the capacitance value, and executing dry-burning prevention operation corresponding to the material of the cookware.
4. The method of claim 3, wherein the first condition comprises:
the intensity of the feedback current of the conductivity detection result is within a first current intensity interval; the first current intensity interval is determined according to the conductivity of the nonmetal material.
5. The method of claim 3, wherein determining a cookware material from the capacitance value comprises:
obtaining a capacitance difference value between the capacitance value and an initial capacitance value;
determining that the cookware is made of a metal material under the condition that the capacitance difference value is greater than or equal to a preset capacitance difference value;
and under the condition that the capacitance difference value is smaller than the preset capacitance difference value, determining that the pot is made of a non-metal material.
6. The method according to claim 5, wherein the capacitance value is obtained from an oscillation frequency of an oscillation circuit in which the capacitor is located.
7. The method of claim 3, wherein the performing of the dry-fire prevention operation corresponding to the material of the pot comprises:
obtaining the pot bottom temperature of the pot and the dry burning prevention temperature corresponding to the material of the pot;
and under the condition that the temperature of the pot bottom is greater than or equal to the dry burning prevention temperature, the fire power is reduced.
8. The method of claim 7,
under the condition that the pot is made of metal, the dry burning prevention temperature is a first set value;
under the condition that the pot is made of non-metal materials, the dry burning prevention temperature is a second set value;
wherein the first set value is smaller than the second set value.
9. The method of any of claims 3 to 8, further comprising:
and under the condition that the conductivity of the cookware does not meet the first condition, executing dry burning prevention operation corresponding to the cookware made of metal materials.
10. Control device for preventing dry-burning of a hob, comprising a processor and a memory in which program instructions are stored, characterized in that said processor is configured to carry out the control method for preventing dry-burning of a hob according to any one of claims 3 to 9, when said program instructions are executed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011014978.5A CN114251682A (en) | 2020-09-24 | 2020-09-24 | Stove and control method and control device for preventing dry burning of stove |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202011014978.5A CN114251682A (en) | 2020-09-24 | 2020-09-24 | Stove and control method and control device for preventing dry burning of stove |
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| CN114251682A true CN114251682A (en) | 2022-03-29 |
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