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

Abstract

The present application relates to the field of smart home appliance technology and discloses a method for preventing dry-burning on stoves. The method comprises: detecting the temperature information of the pot; obtaining the temperature change rate of the pot within a set time period when the temperature information of the pot meets the boiling condition; and executing a corresponding dry-burning prevention operation based on the temperature change rate of the pot. By establishing an association between the cooking state of the pot and factors such as the temperature change rate, a control strategy for preventing dry-burning is determined based on the temperature change rate of the pot in the boiling state. This strategy is not limited by factors such as the type of pot or the type of food being cooked, has a wide range of applications, and makes the judgment of preventing dry-burning more accurate and timely. The present application also discloses a device and a stove for preventing dry-burning on stoves.

Description

Technical Field

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

[0002] Dry-boiling refers to the prolonged heating of an empty pot, which can dry out or burn the contents. It's a common kitchen safety hazard, causing discoloration and deformation, and in severe cases, fire. Currently, dry-boiling protection is common in household stoves. This feature automatically shuts off the stove when the pot reaches a set threshold, providing protection against dry-boiling and protecting the pot.

[0003] During the implementation of the embodiments of the present disclosure, it was found that at least the following problems exist in the related art:

[0004] Related technologies use a single, pre-set temperature threshold to determine if a boil-dry condition has occurred. This method ignores other variables in the cooking process and fails to implement real-time boil-dry prevention based on the pot's changes during cooking. This can lead to premature misjudgments when the pot hasn't actually boiled dry, limiting the effectiveness of boil-dry prevention. 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 of large errors and limited anti-dry burning effect when the anti-dry burning control of the cooker is performed only through a fixed threshold.

[0006] In some embodiments, the method for preventing dry-burning of a stove includes: detecting the temperature information of the pot; when the temperature information of the pot meets the boiling condition, obtaining the temperature change rate of the pot within a set time period; and performing corresponding anti-dry-burning operations according to the temperature change rate of the pot.

[0007] Optionally, performing a corresponding anti-dry-boiling operation according to the temperature change rate of the cookware includes:

[0008] When the temperature change rate of the cooker satisfies a first condition, reducing the firepower of the cooker;

[0009] When the temperature change rate of the cookware does not meet the first condition, the fire power of the cooker is kept unchanged.

[0010] Optionally, the temperature change rate of the cookware includes the temperature change rate of the cookware in multiple detection cycles.

[0011] Optionally, the detection durations of some or all detection cycles are different.

[0012] Optionally, the higher the fire power of the stove, the smaller the number of the detection cycles.

[0013] Optionally, the first condition includes:

[0014] The temperature change rate of the cookware is greater than a first threshold, and the change rate of the temperature change rate is less than a second threshold.

[0015] Optionally, the first threshold is determined according to the fire power of the stove; and / or,

[0016] The second threshold is determined according to the fire power of the stove.

[0017] Optionally, the boiling conditions include:

[0018] The temperature of the pot is within the boiling temperature range, and the temperature change value during the first set time period is less than a third threshold.

[0019] In some embodiments, the device for preventing dry burning of a stove includes a processor and a memory storing program instructions, and the processor is configured to execute the above-mentioned method for preventing dry burning of a stove when executing the program instructions.

[0020] In some embodiments, the stove includes the above-mentioned device for preventing dry burning of the stove.

[0021] The method and device for preventing dry burning of a stove, and the stove provided by the embodiments of the present disclosure can achieve the following technical effects:

[0022] By establishing a correlation between the cooking state of the cookware and factors such as the temperature change rate, a control strategy for preventing dry burning is determined based on the temperature change rate of the cookware in the boiling state. This strategy is not restricted by factors such as the type of cookware or the type of food being cooked, has a wide range of adaptability, and makes the judgment on preventing dry burning more accurate and timely.

[0023] 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

[0024] One or more embodiments are exemplarily described by corresponding drawings. These exemplary descriptions and drawings do not limit the embodiments. Elements with the same reference numerals in the drawings are shown as similar elements. The drawings do not constitute a scale limitation. In addition,

[0025] Figure 1 is a schematic diagram of a method for preventing dry burning of a stove provided by an embodiment of the present disclosure;

[0026] Figure 2 is a schematic diagram of another method for preventing dry burning of a stove provided by an embodiment of the present disclosure;

[0027] Figure 3 is a schematic diagram of another method for preventing dry burning of a stove provided by an embodiment of the present disclosure;

[0028] Figure 4 Schematic diagram of a device for preventing dry burning of a stove provided in an embodiment of the present disclosure. DETAILED DESCRIPTION

[0029] In order to be able to understand the features and technical content 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 accompanying drawings are for reference only and are not used to limit the embodiments of the present disclosure. In the following technical description, for the sake of 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.

[0030] In the description and claims of the embodiments of the present disclosure, as well as in the accompanying drawings, the terms "first," "second," and the like are used to distinguish similar items and are not necessarily used to describe a particular order or precedence. It should be understood that the terms used in this manner are interchangeable where appropriate to describe the embodiments of the present disclosure herein. In addition, the terms "including," "having," and any variations thereof are intended to cover non-exclusive inclusions.

[0031] Unless otherwise stated, the term "plurality" means two or more.

[0032] 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 means: A or B.

[0033] The term "and / or" describes an association between objects, indicating that three relationships can exist. For example, A and / or B means: A or B, or A and B.

[0034] like Figure 1 As shown, an embodiment of the present disclosure provides a method for preventing dry burning of a stove, comprising:

[0035] Step S100: detecting the temperature information of the cookware.

[0036] Generally, when a stove is used to heat a pot, the pot's temperature information may include the pot bottom temperature, its rate of temperature increase based on the relationship between temperature and time, and the rate of change of the temperature increase rate. The temperature parameter can be obtained by a temperature detection device installed on the stove top or pot bottom, while the time parameter can be obtained by a timer on the stove or pot.

[0037] Step S110 : When the temperature information of the cookware meets the boiling condition, the temperature change rate of the cookware is obtained.

[0038] Here, the boiling condition is used to express the control conditions related to the cooking state of the pot. It is used to determine that the current cooking state is cooking with water when the temperature information of the pot meets the boiling condition, so as to establish an association between the pot temperature information and the cooking state, and perform the anti-dry-burning operation related to the cooking state.

[0039] When the temperature information of the pot meets the boiling condition, it is determined that the current cooking state is a water-containing cooking state, and the temperature change rate of the pot is obtained.

[0040] The temperature change rate of the cookware is determined based on the temperature change interval and the heating time of the cookware. For example, if the first temperature change interval [T1, T2] is detected within the first detection period t1, the temperature change rate k1 = (T2-T1) / t1.

[0041] Step S120 , performing a corresponding anti-dry-boiling operation according to the temperature change rate of the cookware.

[0042] Different pots and pans have different heat transfer speeds and temperature change rates due to the influence of cooking ingredients, pot materials, etc. Therefore, based on the correlation between temperature change rate and cooking status, the control strategy for preventing dry burning can be determined. It is not restricted by factors such as pot type and cooking food type, has a wide range of adaptability, and the judgment of preventing dry burning is more accurate and timely.

[0043] Optionally, corresponding anti-dry burning operations are performed according to the temperature change rate of the pot, including: reducing the firepower of the stove when the temperature change rate of the pot meets the first condition; maintaining the firepower of the stove unchanged when the temperature change rate of the pot does not meet the first condition.

[0044] Reducing the stove's power may include reducing the gas supply to the stove, lowering the current level of the stove, or reducing the current supplied to the induction cooker based on the pot's dry-burn prevention strategy. Reducing the stove's power may involve lowering the power so that the stove continues to provide a low level of heat to the pot, or lowering the power until the stove shuts down (or cuts off the power), stopping the heat supply to the pot.

[0045] Here, the first condition is used to express the condition related to the rate of change of the pot temperature when dry-burning occurs in the water cooking state. It is used to control the stove to reduce the firepower or stop heating when the rate of change of the pot temperature meets this condition to prevent the dry-burning problem.

[0046] Optionally, the first condition includes: a temperature change rate of the cookware is greater than a first threshold, and a change rate of the temperature change rate is less than a second threshold.

[0047] Generally, when cooking with water, the temperature of the pot is relatively stable and maintained at a certain temperature without frequent temperature changes, and the temperature change rate is low; when dry burning occurs, the temperature of the pot rises rapidly and the temperature change rate also increases rapidly. At this time, according to the technical solution of the embodiment of the present disclosure, it is determined that the pot has dry burned and the firepower is reduced, which can reduce the impact of dry burning on the pot.

[0048] Here, the first threshold value is used to represent the reasonable range of pot temperature change rates when cooking in the presence of water; the second threshold value is used to represent the variability of the pot temperature change rate. If the pot temperature change rate exceeds the first threshold value, it indicates that the pot temperature is rising rapidly. The rate of change of the pot temperature change rate, i.e., the second derivative of the pot temperature change, obtained through multiple detection cycles, is used to further determine the pot temperature change. If the rate of change of the pot temperature change rate is less than the second threshold value, it indicates that the pot temperature change rate is steadily rising. The current pot temperature change rate is further determined to meet the pot temperature change conditions for dry-burning when cooking in the presence of water. If the pot temperature change conditions meet the conditions, the pot is determined to be dry-burning, and the corresponding dry-burn prevention strategy is implemented.

[0049] The first threshold is determined according to the fire power of the stove; and / or the second threshold is determined according to the fire power of the stove.

[0050] Here, the stove controller may have a preset correspondence between the stove's heat power and the first threshold value, and / or between the stove's heat power and the second threshold value. By searching this correspondence, the values of the first and second threshold values corresponding to the current stove's heat power can be obtained. Alternatively, the correspondence may be pre-stored in another smart home appliance connected to the stove. During communication between the smart home appliance and the stove, the correspondence may be retrieved to determine the values of the first and second threshold values based on the stove's heat power.

[0051] The stove's firepower can be measured by the valve opening of the gas stove, for example, using a rheostat coaxially linked to the gas valve. Typically, the gas valve is at its maximum opening when in the middle position, and the opening gradually decreases in both the forward and reverse directions. In this embodiment, the gas valve opening is nominally 0 when in the middle position, and the two minimum positions are 0.5 and -0.5, respectively. In this embodiment, absolute values are used to describe the opening.

[0052] Optionally, the heating power of the cooking appliance can also be obtained through a heating power detection sensor. The heating power detection sensor can be a rotatable potentiometer installed on the knob column of the cooking appliance switch. By sensing the changes in the resistance, voltage or current of the potentiometer, the heating power adjustment level of the cooking appliance can be obtained, and further the heating power of the cooking appliance can be judged. In another embodiment, the heating power detection sensor can also be a gas flow rate sensing device installed on the gas pipeline, and the heating power of the cooking appliance can be judged by sensing the flow rate of the gas. In still another embodiment, the heating power detection sensor can be a gas pressure sensing device installed on the gas pipeline, and the heating power of the cooking appliance can be judged by sensing the pressure of the gas. Of course, the cooking appliance can also be an induction cooker. At this time, the heating power of the induction cooker can be judged by detecting the magnitude of the current supplied to the coil or the heating power level; the heating power can be divided into multiple levels, such as level 1, level 2, level 3, level 4, level 5, etc. In one embodiment, the heating power is divided into 3 levels, level 1 is low heat, level 2 is medium heat, and level 3 is high heat. The first preset heating power is P1 and the second preset heating power is P2. For example, when the detected heating power P < P1, it is judged that the current heating power level is low heat; when the detected heating power P1 ≤ P ≤ P2, it is judged that the current heating power level is medium heat; when the detected heating power P > P2, it is judged that the current heating power level is high heat.

[0053] Optionally, the higher the heating power of the cooking appliance, the larger the value of the first threshold. According to the pre-stored linear relationship between the heating power of the cooking appliance and the value representing the reasonable rate of temperature change, there is a positive correlation between the first threshold and the heating power of the cooking appliance. In the boiling state, the greater the heating power of the cooking appliance, the higher the heating level, and when dry burning occurs, the faster the temperature change rate of the cookware, and the larger the value; conversely, the smaller the heating power of the cooking appliance, the lower the heating level, and when dry burning occurs, the relatively lower the temperature change rate of the cookware, and the smaller the value.

[0054] Optionally, the higher the heating power of the cooking appliance, the larger the value of the second threshold. According to the pre-stored linear relationship between the heating power of the cooking appliance and the rate of change of the rate of reasonable temperature change, there is a positive correlation between the second threshold and the heating power of the cooking appliance. In the boiling state, the greater the heating power of the cooking appliance, the higher the heating level, and when dry burning occurs, the faster the temperature change rate of the cookware, and the greater the rate of change of the temperature change rate; conversely, the smaller the heating power of the cooking appliance, the lower the heating level, and when dry burning occurs, the relatively lower the rate of change of the temperature change rate of the cookware, and the smaller the value.

[0055] Optionally, the rate of temperature change of the cookware includes the rate of temperature change of the cookware within multiple detection cycles.

[0056] In this way, it is realized that the rate of temperature change in multiple detection cycles continuously satisfies the first condition for multiple times, reducing the probability of triggering the anti-dry burning control due to misdetection, and improving the accuracy of the anti-dry burning judgment.

[0057] Optionally, the detection durations of some or all detection cycles are different. According to the temperature change rates obtained at different detection durations, the temperature changes of the cookware at different durations are obtained, so that the temperature change rate can be determined more accurately.

[0058] Optionally, the higher the fire power of the stove, the smaller the number of detection cycles.

[0059] Here, a correspondence between the cooker's power and detection cycles can be preset in the cooker controller. This correspondence includes a one-to-one correspondence between the cooker's power and the number of detection cycles. By searching this association, the value of the number of detection cycles corresponding to the current cooker's power can be obtained, thereby determining the number of detection cycles, and thus the number of temperature change rates, under the current cooker power. This association can also be pre-stored in other smart home appliances connected to the cooker and retrieved during communication between the smart home appliance and the cooker.

[0060] Optionally, the boiling condition includes: the temperature of the pot is within a boiling temperature range, and the temperature change value within the first set time period is less than a third threshold.

[0061] The boiling temperature range is determined according to the firepower of the stove. Within the boiling temperature range, the pot is in a high temperature state and can maintain a good use state. Optionally, the lower limit of the boiling temperature range is B min The upper limit of the boiling temperature range is B max The lower limit of the boiling temperature range B min and upper limit value B max It is determined by the power of the stove and is positively correlated with the power of the stove. When the temperature of the pot is in this boiling temperature range, the pot has started heating and cooking, and there is no danger of dry burning.

[0062] The third threshold is used to describe the temperature range of a boiling state. Generally, when a cookware enters a boiling state, its temperature fluctuates within a stable, small range. The third threshold is used to describe the range of this fluctuation. If the temperature change of the cookware is less than the third threshold, it proves that the temperature of the cookware meets the temperature characteristics of a boiling state.

[0063] Optionally, the third threshold is determined based on the stove's power. The third threshold is determined by obtaining the stove's power and searching a pre-stored association to obtain a value of the third threshold corresponding to the current stove's power. The pre-stored association includes a one-to-one correspondence between the stove's power and the third threshold. The association may be pre-stored in the stove's controller or in another smart appliance connected to the stove. During communication between the smart appliance and the stove, the association is retrieved to determine the value of the third threshold based on the stove's power, thereby establishing boiling conditions for the pot.

[0064] Optionally, the higher the stove's firepower, the larger the third threshold. Based on the linear relationship between the stove's firepower and the third threshold, there is a positive correlation between the third threshold and the stove's firepower. The higher the stove's firepower, the higher the third threshold for creating a boiling pot condition; the lower the stove's firepower, the lower the third threshold.

[0065] Optionally, the temperature change value within the first set time period is the maximum value of the temperature change values of multiple detection cycles within the first set time period, wherein some or all of the detection cycles have different time periods.

[0066] Optionally, after the temperature change value is obtained, when the pot temperature is lower than the lower limit value B of the boiling temperature range, min In the case of the most recent temperature value, update the lower limit value B of the boiling temperature range. min At the same time, considering that the reason for the temperature drop may be the addition of new ingredients during the cooking process, such as water, vegetables, etc., when the base temperature is lower than the lower limit value B of the boiling temperature range, min When the temperature is collected, all collected data will be cleared and temperature collection will be restarted.

[0067] The method for preventing dry burning of stoves provided by the embodiment of the present disclosure establishes an association between the cooking state of the cookware and factors such as the temperature change rate, thereby determining a control strategy for preventing dry burning according to the temperature change rate of the cookware in the boiling state. The method is not restricted by factors such as the type of cookware and the type of cooked food, has a wide range of adaptability, and makes the judgment on preventing dry burning more accurate and timely.

[0068] Figure 2 FIG. 1 is a flow chart of another method for preventing dry burning of a stove provided by an embodiment of the present disclosure. Figure 2 As shown, the method for preventing dry burning of a stove comprises:

[0069] Step S200: detecting the temperature information of the cookware and the fire power of the stove.

[0070] Optionally, before detecting the temperature information of the pot and the firepower of the stove, the method further includes: obtaining a first starting temperature threshold for starting temperature acquisition; when the temperature of the pot is greater than the first starting temperature threshold, acquiring the firepower and temperature information of the stove. Here, the first starting temperature threshold is used to express the temperature range in which some or all pots are in a safe cooking state during the cooking process. In this way, when the temperature value of the pot exceeds the first starting temperature threshold, continuous or intermittent temperature acquisition is started for dry burning judgment. Optionally, the value range of the first starting temperature threshold is 170°C to 195°C, and can be 170°C, 175°C, 180°C, 185°C, 190°C, or 195°C.

[0071] Optionally, when detecting the temperature information of the cookware, it also includes: obtaining a temperature information count of the cookware collected according to the temperature collection time interval; when the temperature information does not meet the first condition, when the temperature count is greater than the first counting threshold, updating the first starting temperature threshold according to the most recently collected temperature value.

[0072] Here, the temperature information count represents the number of cookware temperature information currently being acquired, and the first count threshold represents the maximum number of temperature information collected. Optionally, the first count threshold is set to 80, or other values depending on the cooktop's operating environment, without limitation. In this embodiment, only the most recent 80 data points are saved.

[0073] Step S210: Determine the value of the corresponding anti-dry-burn parameter according to the firepower of the stove, wherein the anti-dry-burn parameter includes one or more of a boiling temperature range, a first threshold, a second threshold, and a third threshold.

[0074] Here, the anti-dry-burning parameters can be obtained at the beginning of cooking through the corresponding relationship pre-stored in the stove, or they can be obtained during the cooking process.

[0075] In step S220, if the pot temperature is within the boiling temperature range and the temperature change value during the first set time period is less than a third threshold, the temperature change rate of the pot during the set time period is obtained. This establishes a control strategy for preventing dry boiling based on the pot's temperature rise rate when cooking with water.

[0076] Step S230: if the temperature change rate of the cooker is greater than the first threshold and the temperature change rate is less than the second threshold, reduce the firepower of the cooker; otherwise, keep the firepower of the cooker unchanged.

[0077] The method for preventing dry burning of stoves provided by the embodiment of the present disclosure establishes an association between the cooking state of the cookware and factors such as the temperature change rate, thereby determining a control strategy for preventing dry burning according to the temperature change rate of the cookware in the boiling state. The method is not restricted by factors such as the type of cookware and the type of cooked food, has a wide range of adaptability, and makes the judgment on preventing dry burning more accurate and timely.

[0078] Figure 3 FIG. 1 is a flow chart of another method for preventing dry burning of a stove provided by an embodiment of the present disclosure. Figure 3 As shown, the method for preventing dry burning of a stove comprises:

[0079] Step S300: Detecting the temperature of the cookware and the firepower of the stove.

[0080] Step S310: Determine the value of the corresponding dry-burn prevention parameter according to the firepower of the stove, wherein the dry-burn prevention parameter includes at least one or more of a boiling temperature range, a dry-burn temperature rise slope limit, and a dry-burn temperature rise slope variation limit.

[0081] Step S320 determines whether the pot's temperature meets the boiling condition. If so, the process proceeds to step S340; otherwise, the process proceeds to step S330. The boiling condition includes the pot's temperature being within the boiling temperature range and the temperature change within the first set time period being less than a third threshold. The boiling temperature range and the third threshold are determined based on the stove's power.

[0082] Step S330, determine whether the boiling temperature has been reached; if the boiling temperature has been reached, set the existing boiling temperature as the current boiling temperature, and return to step S300; otherwise, determine that the current cooking state is a waterless cooking state, and if the temperature of the pot is greater than the maximum dry-burning threshold, reduce the firepower of the stove.

[0083] The maximum dry-burn threshold is determined according to the firepower of the stove; the higher the firepower of the stove, the higher the maximum dry-burn threshold.

[0084] Step S340: When the boiling temperature is obtained for the first time, determine that the current boiling temperature is the initial boiling temperature; otherwise, determine whether to update the initial boiling temperature based on the value of the boiling temperature obtained this time.

[0085] Step S350, obtaining the temperature change rate of the cookware. If the temperature change rate of the cookware is greater than the dry-boiling temperature rise slope limit, and the change rate of the temperature change rate is less than the dry-boiling temperature rise slope change limit, reduce the firepower of the stove; otherwise, keep the firepower of the stove unchanged.

[0086] Here, the dry-boil temperature rise slope limit is used to describe the reasonable range of pot temperature change rates when boiling water is present. When cooking with water, the pot temperature is maintained at a constant, stable rate of change. When a dry-boil occurs, the pot temperature rises rapidly, and the temperature change rate increases rapidly, exceeding the range of values described by the dry-boil temperature rise slope limit. At this point, the relationship between the temperature change rate and the dry-boil temperature rise slope limit is further used to determine whether the pot temperature change is occasional or continuous, thereby determining whether the pot has dry-boiled. If dry-boil is suspected, the heat is reduced until it is turned off, and the cooker is controlled to issue a dry-boil alarm message to the smart appliance user, or an audible and visual alarm is used to alert the user, thereby reducing the impact of dry-boil on the pot.

[0087] Optionally, the dry-boil temperature rise slope limit and its variation are determined based on the cooktop's power. Generally, the dry-boil temperature rise slope limit varies under different heating conditions. This allows for precise dry-boil prevention of boiling pots based on the cooktop's power level, effectively reducing the false positive rate for dry-boil prevention.

[0088] Optionally, when the temperature change rate of the cookware is less than or equal to the dry-boiling temperature rise slope limit, or the temperature change rate is greater than or equal to the dry-boiling temperature rise slope change limit, the method further includes:

[0089] According to the boiling temperature of the pot, perform the corresponding anti-dry boiling operation; or

[0090] Perform the corresponding anti-dry boil operation according to the initial boiling temperature of the pot; or

[0091] Set the anti-dry boiling threshold according to the boiling temperature of the pot.

[0092] Among them, performing corresponding anti-dry-burning operations according to the boiling temperature of the cookware includes: determining a first difference between the temperature of the cookware and the boiling temperature; reducing the firepower of the stove when the first difference is greater than or equal to the dry-burning temperature rise judgment value; and maintaining the firepower of the stove unchanged when the first difference is less than the dry-burning temperature rise judgment value.

[0093] In this way, by establishing a correlation between the cooking status of the cookware and factors such as the boiling temperature, the control strategy for preventing dry burning can be determined based on the boiling temperature of the cookware and the real-time temperature of the cookware. This strategy is not restricted by factors such as the type of cookware and the type of food being cooked, has a wide range of adaptability, and makes the judgment on preventing dry burning more accurate and timely.

[0094] According to the initial boiling temperature of the cookware, the corresponding anti-dry-boiling operation is performed, including: obtaining the current boiling temperature of the cookware; determining a first difference between the current boiling temperature and the initial boiling temperature; if the first difference is greater than the boiling temperature rise threshold, reducing the firepower of the stove; if the first difference is less than or equal to the boiling temperature rise threshold, keeping the firepower of the stove unchanged.

[0095] Since pots have different boiling temperatures when made of different materials or with different cooking ingredients, changes in the state of the ingredients during the cooking process will cause the boiling temperature of the pot to change, and it is possible that the temperature of the pot and the boiling temperature change synchronously. For example, during the process of stewing porridge, the ingredients gradually become thick and soft. At this time, the changing trends of the boiling temperature and the pot temperature are relatively synchronized. When a dry-burning trend occurs, they rise together, and it is impossible to determine the timing of the anti-dry-burn judgment based on the difference between the pot temperature and the boiling temperature. This solution updates the value of the initial boiling temperature during the cooking process to obtain the lowest temperature in the boiling state. In this way, the dry-burning timing can be determined based on the difference between the boiling temperature of the pot and the initial boiling temperature, thereby improving the accuracy of the anti-dry-burn judgment. When dry burning occurs, the temperature of the pot rises rapidly, and the difference between the current boiling temperature of the pot and the initial boiling temperature becomes larger, exceeding the numerical range expressed by the boiling temperature rise threshold. At this time, according to the technical solution of the embodiment of the present disclosure, it is determined that the pot has dry burned, and the firepower is reduced until the fire is turned off and the gas is cut off. The stove is controlled to send a dry burning alarm message to the smart home appliance to prompt the user, or an alarm is issued through an audible and visual alarm to reduce the impact of dry burning on the pot.

[0096] Set the anti-dry boiling temperature according to the boiling temperature of the pot, including: max =a×T+k sets the anti-dry-boiling temperature. When the temperature of the pot is greater than or equal to the anti-dry-boiling temperature, the stove's firepower is reduced; when the temperature of the pot is lower than the anti-dry-boiling temperature, the stove's firepower remains unchanged.

[0097] Where T max is the cooktop's dry-boiling prevention temperature, T is the pot's boiling temperature, k is a correction parameter, and a is a weighted value greater than 0. The correction factor k is determined based on one or more of the pot's mass, the pot's thermal conductivity, and the stove's power.

[0098] When cooking with water, the pot's temperature remains relatively stable, maintaining a certain temperature range without frequent temperature fluctuations. However, different pots, different ingredients, and different heat levels can produce significantly different boiling temperatures. Therefore, setting the anti-dry-burn temperature based on the pot's boiling temperature allows for a versatile anti-dry-burn strategy that is adaptable to a wide range of cooking needs and provides more accurate and timely judgments.

[0099] Optionally, the above-mentioned method for preventing dry-burning of a stove further includes: controlling the stove to stop heating when the temperature of the pot reaches a maximum set threshold. The maximum set threshold is used to express the temperature at which some or all of the pots 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 maximum set threshold is assigned a value of 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 it is impossible to establish an anti-dry-burning strategy based on the cooking state of the pot, anti-dry-burning protection for the pot can be achieved by setting the maximum set threshold.

[0100] The method for preventing dry burning of stoves provided by the embodiment of the present disclosure establishes an association between the cooking state of the cookware and factors such as the temperature change rate, thereby determining a control strategy for preventing dry burning according to the temperature change rate of the cookware in the boiling state. The method is not restricted by factors such as the type of cookware and the type of cooked food, has a wide range of adaptability, and makes the judgment on preventing dry burning more accurate and timely.

[0101] Figure 4 A device for preventing dry burning of a stove is shown. Figure 4 As shown, the device for preventing dry burning of a stove includes a processor 400 and a memory 401. Optionally, the device may also include a communication interface 402 and a bus 403. The processor 400, the communication interface 402, and the memory 401 may communicate with each other via the bus 403. The communication interface 402 may be used for information transmission. The processor 400 may invoke the logic instructions in the memory 401 to execute the method for preventing dry burning of a stove according to the above embodiment.

[0102] In addition, the logic instructions in the memory 401 can be implemented in the form of software functional units and can be stored in a computer-readable storage medium when sold or used as an independent product.

[0103] Memory 401, as a computer-readable storage medium, can be used to store software programs and computer-executable programs, such as program instructions / modules corresponding to the methods in the embodiments of the present disclosure. Processor 400 executes the program instructions / modules stored in memory 401 to perform functional applications and data processing, thereby implementing the method for preventing dry cooking in the cooktop in the above-described embodiments.

[0104] The memory 401 may include a program storage area and a data storage area. The program storage area may store an operating system and at least one application required for a function; the data storage area may store data generated based on the use of the terminal device. Furthermore, the memory 401 may include high-speed random access memory and non-volatile memory.

[0105] An embodiment of the present disclosure further provides a stove, comprising the above-mentioned device for preventing dry burning of the stove.

[0106] Optionally, the stove also includes a temperature detection device for obtaining the temperature information of the pot. Here, the temperature monitoring device can be a temperature sensor, a negative temperature coefficient (NTC) thermistor, a temperature probe, or other device that can realize temperature detection. Generally, when the stove is used to heat the pot, the temperature information of the pot may include the temperature of the bottom of the pot, its heating rate based on the relationship between temperature and time, and the rate of change of the heating rate. Based on the temperature information of the pot, information such as the cooking status and cooking stage of the pot can be obtained, which can be used to provide an anti-dry burn warning. Optionally, the number of temperature detection devices is one or more.

[0107] Optionally, the stove can be an induction cooker or a gas stove. By setting up a device for preventing dry burning, it can establish a correlation between the cooking state of the pot and factors such as the temperature change rate based on the temperature information of the pot placed on the stove for cooking, and realize determining the control strategy for preventing dry burning according to the temperature change rate of the pot in the boiling state. It is not restricted by factors such as the type of pot or the type of cooked food, has a wide range of adaptability, and makes the judgment on preventing dry burning more accurate and timely, thereby effectively improving the safety of the stove.

[0108] An embodiment of the present disclosure provides a computer-readable storage medium storing computer-executable instructions, wherein the computer-executable instructions are configured to execute the above-mentioned method for preventing dry-burning of a stove.

[0109] 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 method for preventing dry burning of a stove.

[0110] The aforementioned computer-readable storage medium may be a transient computer-readable storage medium or a non-transitory computer-readable storage medium.

[0111] 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 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 embodiments of the present disclosure. The aforementioned storage medium may be a non-transitory storage medium, including: a USB flash drive, a mobile hard disk, a read-only memory (ROM), a random access memory (RAM), a magnetic disk or an optical disk, and other media that can store program code, or a transient storage medium.

[0112] 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 variations. Unless explicitly required, individual components and functions are optional, and the order of operations may vary. Parts and features of some embodiments may be included in or replace 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 claims, unless the context clearly indicates otherwise, the singular forms "a", "an" and "the" are intended to also include plural forms. Similarly, the term "and / or" as used in this application refers to any and all possible combinations of one or more associated listings. In addition, when used in this application, the term "comprise" and its variations "comprises" and / or comprising refer to the presence of stated features, wholes, steps, operations, elements, and / or components, but do not exclude the presence or addition of one or more other features, wholes, steps, operations, elements, components and / or groups of these. In the absence of further restrictions, an element defined by the sentence "comprising a..." does not exclude the presence of other identical elements in the process, method or device that includes the element. In this article, each embodiment may focus on the differences from other embodiments, and the same and similar parts between the various embodiments can be referenced 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 be found in the description of the method part.

[0113] 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 to implement the described functions for each specific application, but such implementation should not be considered to be beyond the scope of the embodiments of the present disclosure. The technicians will clearly understand that, for the convenience and brevity of description, the specific working processes of the systems, devices and units described above can refer to the corresponding processes in the aforementioned method embodiments and will not be repeated here.

[0114] 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 merely illustrative. For example, the division of the units can be merely a logical functional division. In actual implementation, there may be other division methods, 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, and can be electrical, mechanical or other forms. The units described as separate components may or may not be physically separated, and the components shown 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 to implement this embodiment according to actual needs. In addition, the functional units in the embodiments of the present disclosure may be integrated into a processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit.

[0115] The flowcharts and block diagrams in the accompanying drawings show the possible implementation architectures, functions and operations of the systems, methods and computer program products according to the embodiments of the present disclosure. In this regard, each box in the flowchart or block diagram can represent a module, program segment or part of the code, and the module, program segment or part of the code contains one or more executable instructions for implementing the specified logical functions. In some alternative implementations, the functions marked in the box can also occur in an order different from that marked in the accompanying drawings. For example, two consecutive boxes can actually be executed substantially in parallel, or they can sometimes be executed in the opposite order, which can depend on the functions involved. In the descriptions corresponding to the flowcharts and block diagrams in the accompanying drawings, the operations or steps corresponding to different boxes can also occur in an order different from that 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, or 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 function or action, or may be implemented by a combination of dedicated hardware and computer instructions.

Claims

1. A method for preventing dry burning of a stove, characterized in that: include: Detect the temperature information of the pot; When the temperature information of the pot meets the boiling condition, obtaining the temperature change rate of the pot within a set time period; The boiling condition includes: the temperature of the pot is within the boiling temperature range, and the temperature change value of the first set time is less than a third threshold value; the third threshold value is used to express the temperature range value of the boiling state; When the temperature change rate of the cooker satisfies a first condition, reducing the firepower of the cooker; When the temperature change rate of the cookware does not meet the first condition, keeping the fire power of the cooker unchanged; The first condition includes: The temperature change rate of the pot is greater than a first threshold value, and the change rate of the temperature change rate is less than a second threshold value; the first threshold value is determined according to the firepower of the stove, and the higher the firepower of the stove, the larger the value of the first threshold value; the second threshold value is determined according to the firepower of the stove, and the higher the firepower of the stove, the larger the value of the second threshold value; the first threshold value is used to express a reasonable range of change rates of the pot temperature in the water cooking state; the second threshold value is used to express a change in the pot temperature change rate; when the change rate of the pot temperature change rate is less than the second threshold value, it indicates that the pot temperature change rate is in a stable rising state, and it is further determined that the current pot temperature change rate meets the pot temperature change condition when dry burning occurs in the water cooking state. When the pot temperature change condition meets the condition, it is determined that the pot is dry burning, and a corresponding anti-dry burning strategy is executed.

2. The method according to claim 1, characterized in that The temperature change rate of the cookware includes the temperature change rate of the cookware in multiple detection cycles.

3. The method according to claim 2, characterized in that The detection duration of some or all detection cycles is different.

4. The method according to claim 2, characterized in that The higher the fire power of the stove, the smaller the number of the detection cycles.

5. A 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 perform the method for preventing dry burning of a cooker according to any one of claims 1 to 4 when executing the program instructions.

6. A stove, characterized in that: The invention comprises the device for preventing dry burning of a stove as claimed in claim 5.

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