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

Abstract

The present application relates to the technical field of smart home appliances, and discloses a method for preventing dry burning of a stove, the method comprising: detecting the temperature information of the pot; obtaining the initial boiling temperature of the pot when the temperature information of the pot meets the boiling condition; and performing the corresponding dry burning prevention operation according to the initial boiling temperature of the pot. By establishing an association between the cooking state of the pot and factors such as the boiling temperature, a control strategy for preventing dry burning is determined according to the change in the difference between the current boiling temperature and the initial boiling temperature of the pot. The method is not limited by factors such as the type of pot and 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 for preventing dry burning of a stove and a stove.

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

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

[0004] In the related art, by comparing with a single pre-set temperature threshold, dry burning is judged to have occurred when the bottom temperature of the pot is higher than the threshold. Other variable factors in the cooking process are ignored, and real-time dry burning prevention control cannot be performed according to the changes of the pot during the cooking process, which can easily lead to premature misjudgment of the pot when dry burning has not actually occurred, and the anti-dry burning effect is limited. Summary of the invention

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

[0006] In some embodiments, the method for preventing dry-burning of a stove includes: detecting temperature information of a cooker; when the temperature information of the cooker meets boiling conditions, obtaining an initial boiling temperature of the cooker; and performing a corresponding anti-dry-burning operation according to the initial boiling temperature of the cooker.

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

[0008] Obtaining the current boiling temperature of the pot;

[0009] determining a first difference between the current boiling temperature and the initial boiling temperature;

[0010] When the first difference satisfies a first condition, reducing the fire power of the stove;

[0011] When the first difference does not satisfy the first condition, the fire power of the stove is kept unchanged.

[0012] Optionally, determining a first difference between the current boiling temperature of the cookware and the initial boiling temperature includes:

[0013] Obtain temperature values ​​of multiple boiling temperatures of the cookware within a first time period;

[0014] In a case where the minimum value of the pot boiling temperature is greater than the initial boiling temperature, the difference between the minimum value of the pot boiling temperature and the initial boiling temperature is determined as the first difference.

[0015] Optionally, the higher the fire power of the stove is, the fewer the number of temperature values ​​for obtaining the boiling temperature of the pot is.

[0016] Optionally, the first condition includes: the first difference is greater than a boiling temperature rise threshold.

[0017] Optionally, the boiling temperature rise threshold is determined according to the fire power of the stove.

[0018] Optionally, the higher the fire power of the stove, the higher the value of the boiling temperature rise threshold.

[0019] Optionally, the initial boiling temperature of the cookware is the lowest temperature of the cookware within the first time period.

[0020] In some embodiments, the device for preventing dry burning of a stove comprises a processor and a memory storing program instructions, and the processor is configured to execute the above-mentioned method for preventing dry burning of a stove when executing the program instructions.

[0021] In some embodiments, the stove includes the above-mentioned device for preventing dry burning of the stove.

[0022] 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:

[0023] By establishing a correlation between the cooking state of the cookware and factors such as the boiling temperature, the control strategy for preventing dry burning is determined according to the change in the difference between the current boiling temperature and the initial boiling temperature of the cookware. This control strategy is not limited by factors such as the type of cookware or the type of food being cooked, has a wide range of applications, and makes the judgment on preventing dry burning more accurate and timely.

[0024] 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

[0025] One or more embodiments are exemplarily described by corresponding drawings, which do not limit the embodiments. Elements with the same reference numerals in the drawings are shown as similar elements, and the drawings do not constitute a scale limitation, and wherein:

[0026] Figure 1is a schematic diagram of a method for preventing dry burning of a stove provided by an embodiment of the present disclosure;

[0027] Figure 2 is a schematic diagram of another method for preventing dry burning of a stove provided by an embodiment of the present disclosure;

[0028] Figure 3 is a schematic diagram of another method for preventing dry burning of a stove provided by an embodiment of the present disclosure;

[0029] Figure 4 It is a schematic diagram of a device for preventing dry burning of a stove provided in an embodiment of the present disclosure. DETAILED DESCRIPTION

[0030] In order to be able to understand the features and technical contents of the embodiments of the present disclosure in more detail, the implementation of the embodiments of the present disclosure is described in detail below in conjunction with the accompanying drawings. The attached drawings are for reference only and are not used to limit the embodiments of the present disclosure. In the following technical description, for the convenience of explanation, a full understanding of the disclosed embodiments is provided through multiple details. However, one or more embodiments can still be implemented without these details. In other cases, to simplify the drawings, well-known structures and devices can be simplified for display.

[0031] The terms "first", "second", etc. in the specification and claims of the embodiments of the present disclosure and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the terms used in this way can be interchanged where appropriate, so as to describe the embodiments of the embodiments of the present disclosure described herein. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions.

[0032] Unless otherwise stated, the term "plurality" means two or more.

[0033] In the embodiment of the present disclosure, the character " / " indicates that the preceding and following objects are in an "or" relationship. For example, A / B indicates: A or B.

[0034] The term "and / or" is a description of the association relationship between objects, indicating that three relationships can exist. For example, A and / or B means: A or B, or, A and B.

[0035] like Figure 1 As shown, a method for preventing dry burning of a stove provided by an embodiment of the present disclosure includes:

[0036] Step S100, detecting the temperature information of the cookware.

[0037] Generally, when a stove is used to heat a 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. The temperature parameter can be obtained by a temperature detection device arranged on the stove or the bottom of the pot, and the time parameter can be obtained by a timer on the stove or the pot.

[0038] Step S110, when the temperature information of the cookware meets the boiling condition, obtaining the initial boiling temperature of the cookware.

[0039] Here, the boiling condition is used to express the control conditions related to the cooking state of the cooker. When the temperature information of the cooker meets the boiling condition, it is used to determine that the current cooking state is cooking with water, so as to establish an association between the temperature information of the cooker and the cooking state, and perform the anti-dry burning operation related to the cooking state.

[0040] When the temperature information of the pot meets the boiling condition, the current cooking state is determined to be a water-containing cooking state, and the initial boiling temperature of the pot is obtained. The initial boiling temperature of the pot is the first boiling temperature of the pot obtained after the pot enters the boiling state, or the minimum value of multiple pot temperatures detected in the boiling state.

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

[0042] By establishing a correlation between the cooking state of the cookware and factors such as the initial boiling temperature, the control strategy for preventing dry burning can be determined based on the initial boiling temperature of the cookware and the current boiling temperature of the cookware. This control strategy is not limited by factors such as the type of cookware and the type of food being cooked, has a wide range of applications, and makes the judgment on preventing dry burning more accurate and timely.

[0043] Optionally, according to the initial boiling temperature of the cookware, a corresponding anti-dry-burning 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 satisfies a first condition, reducing the firepower of the stove; if the first difference does not satisfy the first condition, keeping the firepower of the stove unchanged.

[0044] Reducing the firepower of the stove includes reducing the gas supply of the stove, reducing the current firepower level of the stove, and reducing the supply current of the electromagnetic cooker according to the anti-dry burning strategy of the pot. Here, reducing the firepower of the stove can be to keep the stove in a state of supplying less heat to the pot after reducing the firepower, or to reduce the firepower until the stove is turned off and the gas (power) is cut off, and the heat supply to the pot is stopped.

[0045] Here, the first condition is used to express the conditions related to the change in the temperature of the pot when a dry burn occurs in the water cooking state, and is used to control the stove to reduce the firepower or stop heating when the difference between the temperature of the pot and the initial boiling temperature meets the condition to prevent the dry burn problem. Since the pot has different boiling temperatures when the material is different or the cooking materials are different, the change in the state of the ingredients during the cooking process will cause the boiling temperature of the pot to change, and the temperature of the pot may change synchronously with the boiling temperature. For example, during the stewing process such as porridge, the ingredients gradually become thick and soft. At this time, the change trends of the boiling temperature and the pot temperature are relatively synchronized, and they rise together when a dry burn trend occurs. It is impossible to determine the timing of the anti-dry burn judgment based on the difference between the temperature of the pot 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, so that the dry burn 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.

[0046] Optionally, determining a first difference between the boiling temperature of the cookware and the initial boiling temperature includes: obtaining multiple temperature values ​​of the cookware within a first time period; when the minimum value of the boiling temperature value is greater than the initial boiling temperature, determining the difference between the minimum temperature value and the initial boiling temperature as the first difference.

[0047] In this way, the difference between the current boiling temperature and the initial boiling temperature of the cookware within the first time period satisfies the first condition for multiple times in a row, thereby reducing the probability of triggering the anti-dry-boiling control due to false detection and improving the accuracy of the anti-dry-boiling judgment.

[0048] Furthermore, when the minimum value of the temperature value of the boiling temperature of the cooker is less than the initial boiling temperature, the initial boiling temperature is updated according to the minimum value of the temperature value of the boiling temperature of the cooker.

[0049] Optionally, the higher the fire power of the stove is, the fewer the number of temperature values ​​for obtaining the boiling temperature of the pot is.

[0050] Here, a correspondence between the firepower of the stove and the number of temperature values ​​of the boiling temperature of the pot that need to be obtained can be preset in the stove controller, and the correspondence includes a one-to-one correspondence between the firepower of the stove and the number of temperature values ​​of the boiling temperature of the pot that need to be obtained. By searching the association relationship, the number of temperature values ​​of the boiling temperature corresponding to the current firepower of the stove can be obtained, so as to establish the detection steps of the anti-dry burning method adapted to the current firepower of the stove.

[0051] The association relationship may also be pre-stored in other smart home appliances connected to the stove, and the association relationship may be retrieved during the communication between the smart home appliance and the stove to determine the number of temperature values ​​that need to be detected according to the firepower of the stove.

[0052] Optionally, the first condition includes: the first difference is greater than a boiling temperature rise threshold.

[0053] Here, the boiling temperature rise threshold is used to express the reasonable range of increase in the pot temperature in the boiling state of water cooking. In the water cooking state, the temperature of the pot is relatively stable, maintaining a certain temperature fluctuation. However, pots have different boiling temperatures when they are made of different materials or cooking materials. Changes in the state of the ingredients during the cooking process will cause the boiling temperature of the pot to change. It may happen that the temperature of the pot changes synchronously with the boiling temperature. For example, during the stewing process such as 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 there is a dry burning trend, they rise together, and it is impossible to determine the timing of anti-dry burning based on the difference between the temperature of the pot and the boiling temperature. At this time, by updating the value of the initial boiling temperature during the cooking process to obtain the lowest temperature in the boiling state, it is possible to determine the timing of dry burning based on the difference between the boiling temperature of the pot and the initial boiling temperature, thereby improving the accuracy of the anti-dry burning judgment. In this state, when dry burning occurs, the temperature of the cookware rises rapidly, and the boiling temperature of the cookware rises along with the temperature of the cookware. The difference between the current boiling temperature of the cookware and the initial boiling temperature becomes larger, exceeding the reasonable temperature rise range under the boiling state. At this time, according to the scheme of the embodiment of the present disclosure, it is determined that the cookware has dry burned, and the firepower is reduced, which can reduce the impact of dry burning on the cookware.

[0054] Optionally, the boiling temperature rise threshold is determined according to the firepower of the stove. Generally, under different heating conditions, the boiling temperature of the pot varies in different ranges, so accurate dry-burn prevention of the pot in the boiling state is achieved according to the firepower, effectively reducing the misjudgment rate of dry-burn prevention.

[0055] Here, the firepower of the stove can be obtained through the valve opening of the gas stove, for example, through a rheostat coaxially linked to the gas valve and arranged on the gas stove. Usually, the opening is the largest when the gas valve is in the middle position, and the opening gradually decreases in both the positive and negative directions. In this embodiment, when the gas valve is in the middle position, the opening is nominally 0, and the two smallest positions are 0.5 and -0.5, respectively, and absolute values ​​are used for description in this embodiment.

[0056] Optionally, the cooking power of the cooker can also be obtained through a cooking power detection sensor. The cooking power detection sensor can be a rotatable potentiometer installed on the knob column of the cooker switch. By sensing the changes in the resistance, voltage or current of the potentiometer, the cooking power adjustment level of the cooker is obtained, and further the cooking power of the cooker is judged. In another embodiment, the cooking power detection sensor can also be a gas flow rate sensing device installed on the gas pipeline, and the cooking power of the cooker is judged by sensing the flow rate of the gas. In still another embodiment, the cooking power detection sensor can be a gas pressure sensing device installed on the gas pipeline, and the cooking power of the cooker is judged by sensing the pressure of the gas. Of course, the cooker can also be an induction cooker. At this time, the cooking power of the induction cooker can be judged by detecting the magnitude of the current supplied to the coil or the cooking power level; the cooking power can be divided into multiple levels, such as level 1, level 2, level 3, level 4 and level 5, etc. In one embodiment, the cooking power is divided into 3 levels. Level 1 is low fire, level 2 is medium fire, and level 3 is high fire. The first preset cooking power is P1 and the second preset cooking power is P2. For example, when the detected cooking power P < P1, it is judged that the current cooking power level is low fire; when the detected cooking power P1 ≤ P ≤ P2, it is judged that the current cooking power level is medium fire; when the detected cooking power P > P2, it is judged that the current cooking power level is high fire.

[0057] Optionally, the higher the cooking power of the cooker, the larger the value of the boiling temperature rise threshold. According to the linear relationship between the cooking power of the cooker and the value representing the reasonable temperature rise range in the boiling state, there is a positive correlation between the boiling temperature rise threshold and the cooking power of the cooker. In the boiling state, the greater the cooking power of the cooker, the higher the heating degree and the greater the rising space of the temperature of the cookware; the smaller the cooking power of the cooker, the lower the heating degree and the more stable the temperature of the cookware.

[0058] Here, the first condition is determined in the following manner: Obtain the cooking power of the cooker, and obtain the value of the boiling temperature rise threshold corresponding to the current cooking power of the cooker by looking up the pre-stored correlation. Among them, the preset corresponding relationship includes the one-to-one correspondence between the cooking power of the cooker and the boiling temperature rise threshold. The correlation can be pre-stored in the controller of the cooker, or can be pre-stored in other smart home appliances connected to the cooker. During the communication between the smart home appliance and the cooker, the correlation is retrieved to realize the determination of the value of the boiling temperature rise threshold according to the cooking power of the cooker.

[0059] Here, a correspondence between the firepower of the stove and the boiling temperature rise threshold value can be preset in the stove controller, and the correspondence includes a one-to-one correspondence between the firepower of the stove and the boiling temperature rise threshold value. By searching the association relationship, the value of the boiling temperature rise threshold value corresponding to the firepower of the current stove can be obtained to form the first condition related to the temperature change of the pot in the dry-boiling state. The association relationship can also be pre-stored in other smart home appliances connected to the stove, and the association relationship is retrieved during the communication between the smart home appliances and the stove to determine the value of the boiling temperature rise threshold value according to the firepower of the stove.

[0060] Optionally, the initial boiling temperature of the pot is the lowest temperature of the pot within the second time period. By obtaining the lowest temperature of the pot within the second time period as a reference comparison value for detecting the temperature of the pot during the boiling stage, on the one hand, the initial boiling temperature can be updated during the detection process, and on the other hand, the rise in the pot temperature can be evaluated based on the reference value of the initial boiling temperature during the detection process to determine the timing of dry boiling.

[0061] Here, the first duration includes the set duration after the first determination that the pot temperature information meets the boiling condition. During the first duration, one or more temperatures of the pot are obtained, and the lowest temperature is set as the initial boiling temperature to reduce the probability of misdetection and improve the accuracy of the dry-boiling prevention judgment.

[0062] Optionally, the boiling condition includes: the temperature of the pot is within a boiling temperature range, and a temperature change value within a third time period is less than a second threshold value.

[0063] 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 . Boiling temperature range lower limit B min and upper limit value B max It is determined according to the firepower of the stove and is positively correlated with the firepower 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.

[0064] The second threshold is used to express the temperature range value in the boiling state. Generally, when the pot enters the boiling state, its temperature is in a stable small range fluctuation state, and the second threshold is used to express the range of the fluctuation state. When the temperature change value of the pot is less than the second threshold, it proves that the temperature of the pot meets the temperature characteristics of the boiling state.

[0065] Optionally, the second threshold is determined according to the firepower of the stove. The second threshold is determined in the following manner: the firepower of the stove is obtained, and the value of the second threshold corresponding to the firepower of the current stove is obtained by searching a pre-stored association relationship, wherein the preset corresponding relationship includes a one-to-one correspondence between the firepower of the stove and the second threshold, and the association relationship can be pre-stored in the controller of the stove, or can be pre-stored in other smart home appliances connected to the stove. In the process of mutual communication between the smart home appliance and the stove, the association relationship is retrieved to determine the value of the second threshold according to the firepower of the stove, so as to form the boiling condition of the pot.

[0066] Optionally, the higher the firepower of the stove is, the larger the value of the second threshold is. According to the linear relationship between the firepower of the stove and the second threshold, there is a positive correlation between the second threshold and the firepower of the stove. The greater the firepower of the stove is, the higher the value of the second threshold for forming the boiling condition of the pot is; the smaller the firepower of the stove is, the lower the value of the second threshold is.

[0067] Optionally, the temperature change value within the third time period is the maximum value of the temperature change values ​​of multiple detection cycles within the third time period, wherein the time periods of some or all detection cycles are different.

[0068] 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 temperature drop may be caused by the addition of new ingredients during the cooking process, such as water, vegetables, etc., when the base temperature is less 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.

[0069] The method for preventing dry burning of stoves provided by the embodiment of the present disclosure establishes a correlation between the cooking state of the cookware and factors such as the boiling temperature, so as to determine the control strategy for preventing dry burning according to the change in the difference between the temperature of the cookware and the initial boiling temperature. The method is not limited by factors such as the type of cookware and the type of cooked food, has a wide range of applications, and makes the judgment on preventing dry burning more accurate and timely.

[0070] Figure 2 is a flow chart of another method for preventing dry burning of a stove provided by an embodiment of the present disclosure, such as Figure 2 As shown, the method for preventing dry burning of a stove comprises:

[0071] Step S200, detecting the temperature information of the cooker and the fire power of the stove.

[0072] Optionally, before detecting the temperature information of the pot and the firepower of the stove, it also includes: obtaining a first starting temperature threshold for starting temperature collection; when the temperature of the pot is greater than the first starting temperature threshold, obtaining 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 of the 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 collection is started for dry burning judgment. Optionally, the value range of the first starting temperature threshold is 170°C to 195°C, which can be 170°C, 175°C, 180°C, 185°C, 190°C, or 195°C.

[0073] Optionally, when detecting the temperature information of the cookware, it also includes: obtaining a temperature information count of the cookware collected according to a temperature collection time interval; when the temperature information does not meet the first condition, when the temperature count is greater than a first count threshold, updating the first start temperature threshold according to the most recently collected temperature value.

[0074] Here, the temperature information count is used to indicate the number of currently acquired pot temperature information, and the first count threshold indicates the maximum value of the collected temperature information. Optionally, the first count threshold is set to 80, or it can be set to other values ​​according to the use environment of the cooker, which is not limited here. In this embodiment, only the most recent 80 data are saved.

[0075] Step S210, determining the value of the corresponding anti-dry-burning parameter according to the firepower of the stove, wherein the anti-dry-burning parameter includes one or more of a boiling temperature range, a boiling temperature rise threshold, and a second threshold.

[0076] Here, the anti-dry-burning parameters may be obtained at the beginning of cooking through the corresponding relationship pre-stored in the cooker, or may be obtained during the cooking process.

[0077] Step S220: When the pot temperature is within the boiling temperature range and the temperature change value within the third time period is less than the second threshold, the current pot temperature is obtained as the boiling temperature, so as to establish an anti-dry-burning strategy in the state of cooking with water.

[0078] Step S230, when the boiling temperature is obtained for the first time, determine the current boiling temperature as the initial boiling temperature; otherwise, when the current boiling temperature is less than the initial boiling temperature, update the initial boiling temperature according to the current boiling temperature.

[0079] Step S240, 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; otherwise, maintaining the firepower of the stove unchanged.

[0080] 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 boiling temperature, so as to determine the control strategy for preventing dry-burning according to the change in the difference between the current boiling temperature and the initial boiling temperature of the cookware. The method is not limited by factors such as the type of cookware and the type of cooked food, has a wide range of applications, and makes the judgment on preventing dry-burning more accurate and timely.

[0081] Figure 3 is a flow chart of another method for preventing dry burning of a stove provided by an embodiment of the present disclosure, such as Figure 3 As shown, the method for preventing dry burning of a stove comprises:

[0082] Step S300, detecting the temperature information of the cooker and the fire power of the stove.

[0083] Step S310, determining the value of the corresponding anti-dry-burning parameter according to the firepower of the stove, wherein the anti-dry-burning parameter includes at least one or more of a boiling temperature range, a boiling temperature rise threshold, and a second threshold.

[0084] Step S320, determining whether the temperature information of the pot meets the boiling condition, if so, proceeding to step S340, otherwise, proceeding to step S330. Here, the boiling condition includes that the temperature of the pot is within the boiling temperature range, and the temperature change value within the third time period is less than the second threshold. The boiling temperature range and the second threshold are determined according to the firepower of the stove.

[0085] 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 when the temperature of the pot is greater than the maximum dry-burning threshold, reduce the firepower of the stove.

[0086] The maximum dry-burning threshold is determined according to the firepower of the stove; the higher the firepower of the stove, the higher the value of the maximum dry-burning threshold.

[0087] 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.

[0088] Optionally, whether to update the initial boiling temperature is determined based on the value of the boiling temperature obtained this time, including: when the value of the boiling temperature obtained this time is greater than or equal to the initial boiling temperature, the initial boiling temperature is not updated; when the value of the boiling temperature obtained this time is less than the initial boiling temperature, the initial boiling temperature is updated.

[0089] Step S350, determining a first difference between the current boiling temperature of the cooker and the initial boiling temperature; if the first difference is greater than the boiling temperature rise threshold, reducing the firepower of the cooker; otherwise, maintaining the firepower of the cooker unchanged.

[0090] Here, the boiling temperature rise threshold is used to express the reasonable rising range value of the pot based on the initial boiling temperature (minimum value) in the boiling state of water cooking. In the water cooking state, the temperature of the pot is relatively stable and maintained at a certain temperature without frequent temperature changes. When dry burning occurs, the boiling temperature of the pot rises rapidly along with the temperature of the bottom of the pot, 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 is dry burning, and the firepower is reduced until the fire is turned off and the gas is cut off, and the cooker 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.

[0091] Optionally, when the first difference is less than the dry-boiling temperature rise judgment value, the method further includes:

[0092] According to the temperature change rate of the cookware, perform the corresponding anti-dry-boiling operation; or

[0093] According to the boiling temperature of the pot, perform the corresponding anti-dry boiling operation; or

[0094] Set the anti-dry boiling threshold according to the boiling temperature of the pot.

[0095] Among them, according to the temperature change rate of the cooker, the corresponding anti-dry-burning operation is performed, including: obtaining the temperature change rate of the cooker, and when the temperature change rate of the cooker is greater than the dry-burning temperature rise slope limit value, and the change rate of the temperature change rate is less than the dry-burning temperature rise slope change limit value, reducing the firepower of the stove; otherwise, keeping the firepower of the stove unchanged

[0096] Here, the dry-burning temperature rise slope limit is used to express the reasonable change rate range of the pot temperature in the boiling state of water cooking. In the water cooking state, the temperature of the pot is maintained at a certain temperature, and the temperature change rate of the pot is relatively stable; when dry-burning occurs, the temperature of the pot rises rapidly, and the temperature change rate increases rapidly, exceeding the numerical range expressed by the dry-burning temperature rise slope limit. At this time, the relationship between the change rate of the temperature change rate and the dry-burning temperature rise slope change limit is further used to judge whether the change in the pot temperature is an occasional or continuous situation, to determine whether the pot has dry-burned, and if it is determined that dry-burning is possible, reduce the fire until the fire is turned off, and control the stove to send a dry-burning alarm message to the smart home appliance to prompt the user, or alarm through the sound and light alarm to reduce the impact of dry-burning on the pot.

[0097] Performing corresponding anti-dry-burning operations according to the boiling temperature of the cooker includes: determining a first difference between the temperature of the cooker 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.

[0098] In this way, by establishing a correlation between the cooking state 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 control strategy is not limited by factors such as the type of cookware or the type of food being cooked, has a wide range of applications, and makes the judgment on preventing dry burning more accurate and timely.

[0099] Set the anti-dry boiling temperature according to the boiling temperature of the pot, including: max =a×T+k sets the anti-dry-burn temperature. When the temperature of the pot is greater than or equal to the anti-dry-burn temperature, the firepower of the stove is reduced; when the temperature of the pot is lower than the anti-dry-burn temperature, the firepower of the stove remains unchanged.

[0100] Where T max is the anti-dry-boiling temperature of the stove, T is the boiling temperature of the pot, k is a correction parameter, and a is a weighted value greater than 0. The correction coefficient k is determined according to one or more of the mass of the pot, the thermal conductivity of the pot, and the firepower of the stove.

[0101] When cooking with water, the temperature of the pot is relatively stable, maintaining fluctuations within a certain temperature range, and there will not be frequent temperature changes. However, when cooking with different pots, different ingredients, and different firepower, the boiling temperature varies greatly. Therefore, setting the anti-dry-burn temperature according to the boiling temperature of the pot can achieve an anti-dry-burn strategy that is not picky about pots, has a wide range of applications, and makes the judgment of anti-dry-burn more accurate and timely.

[0102] Optionally, the above-mentioned method for preventing dry-burning of a stove further includes: when the temperature of the pot reaches the maximum set threshold, controlling the stove to stop heating. 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 according to the cooking state of the pot, anti-dry-burning protection for the pot is achieved by setting the maximum set threshold.

[0103] The method for preventing dry burning of stoves provided by the embodiment of the present disclosure establishes a correlation between the cooking state of the cookware and factors such as the boiling temperature, so as to determine the control strategy for preventing dry burning according to the change in the difference between the temperature of the cookware and the initial boiling temperature. The method is not limited by factors such as the type of cookware and the type of cooked food, has a wide range of applications, and makes the judgment on preventing dry burning more accurate and timely.

[0104] 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 through the bus 403. The communication interface 402 may be used for information transmission. The processor 400 may call the logic instructions in the memory 401 to execute the method for preventing dry burning of a stove in the above embodiment.

[0105] In addition, the logic instructions in the memory 401 described above may be implemented in the form of software functional units and when sold or used as independent products, may be stored in a computer-readable storage medium.

[0106] The memory 401 is a computer-readable storage medium that can be used to store software programs and computer executable programs, such as program instructions / modules corresponding to the method in the embodiment of the present disclosure. The processor 400 executes the function application and data processing by running the program instructions / modules stored in the memory 401, that is, the method for preventing dry burning of the stove in the above embodiment is implemented.

[0107] The memory 401 may include a program storage area and a data storage area, wherein the program storage area may store an operating system and an application required for at least one function; the data storage area may store data created according to the use of the terminal device, etc. In addition, the memory 401 may include a high-speed random access memory and may also include a non-volatile memory.

[0108] The disclosed embodiment also provides a stove, comprising the above-mentioned device for preventing dry burning of the stove.

[0109] 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. According to the temperature information of the pot, the cooking state, cooking stage and other information of the pot can be obtained, which can be used for anti-dry burning warning. Optionally, the number of temperature detection devices is one or more.

[0110] Optionally, the stove can be an induction cooker or a gas stove. By providing a device for preventing dry burning, it is possible to determine a control strategy for preventing dry burning according to the change in the difference between the temperature of the pot and the initial boiling temperature by establishing a correlation between the cooking state of the pot and factors such as the boiling temperature based on the temperature information of the pot placed on the stove for cooking. The control 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 the judgment on preventing dry burning is more accurate and timely, which effectively improves the safety of the stove.

[0111] 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.

[0112] 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.

[0113] The computer-readable storage medium mentioned above may be a transient computer-readable storage medium or a non-transitory computer-readable storage medium.

[0114] The technical solution of the embodiment of the present disclosure can be embodied in the form of a software product, which is stored in a storage medium and includes one or more instructions for causing a computer device (which may be a personal computer, a server, or a network device, etc.) to execute all or part of the steps of the method of the embodiment of the present disclosure. The aforementioned storage medium may be a non-transient storage medium, including: a USB flash drive, a mobile hard disk, a read-only memory (ROM, Read-Only Memory), a random access memory (RAM, Random Access Memory), a disk or an optical disk, and other media that can store program codes, or a transient storage medium.

[0115] The above description and the accompanying drawings fully illustrate the embodiments of the present disclosure so that those skilled in the art can practice them. Other embodiments may include structural, logical, electrical, process and other changes. The embodiments represent only possible changes. Unless explicitly required, separate components and functions are optional, and the order of operation may vary. The parts and features of some embodiments may be included in or replace the parts and features of other embodiments. Moreover, the words used in this application are only used to describe the embodiments and are not used to limit the claims. As used in the description of the embodiments and the claims, unless the context clearly indicates, the singular forms of "a", "an" and "the" are intended to include plural forms as well. Similarly, the term "and / or" as used in this application refers to any and all possible combinations of listings containing one or more associated ones. In addition, when used in the present application, the term "comprise" and its variants "comprises" and / or comprising refer to the presence of stated features, wholes, steps, operations, elements, and / or components, but do not exclude the presence or addition of one or more other features, wholes, steps, operations, elements, components and / or groups thereof. In the absence of further restrictions, the elements defined by the sentence "comprising a ..." do not exclude the presence of other identical elements in the process, method or device comprising the elements. In this article, each embodiment may focus on the differences from other embodiments, and the same and similar parts between the various embodiments may refer to each other. For the methods, products, etc. disclosed in the embodiments, if they correspond to the method part disclosed in the embodiments, then the relevant parts can refer to the description of the method part.

[0116] Those skilled in the art will appreciate that the units and algorithm steps of each example described in conjunction with the embodiments disclosed herein can be implemented in electronic hardware, or a combination of computer software and electronic hardware. Whether these functions are performed in hardware or software may depend on the specific application and design constraints of the technical solution. The technicians may use different methods for each specific application to implement the described functions, but such implementations should not be considered to exceed the scope of the embodiments of the present disclosure. The technicians may clearly understand that, for the convenience and simplicity of description, the specific working processes of the systems, devices and units described above may refer to the corresponding processes in the aforementioned method embodiments, and will not be repeated here.

[0117] In the embodiments disclosed herein, the disclosed methods and products (including but not limited to devices, equipment, etc.) can be implemented in other ways. For example, the device embodiments described above are only schematic. For example, the division of the units can be only a logical function division. There may be other division methods in actual implementation, such as multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. In addition, the coupling or direct coupling or communication connection between each other shown or discussed can be through some interfaces, indirect coupling or communication connection of devices or units, which can be electrical, mechanical or other forms. The units described as separate components may or may not be physically separated, and the components displayed as units may or may not be physical units, that is, they may be located in one place, or they may be distributed on multiple network units. Some or all of the units may be selected according to actual needs to implement this embodiment. In addition, each functional unit in the embodiment of the present disclosure may be integrated in a processing unit, or each unit may exist physically alone, or two or more units may be integrated in one unit.

[0118] The flowchart and block diagram in the accompanying drawings show the possible architecture, function and operation of the system, method and computer program product according to the embodiment of the present disclosure. In this regard, each box in the flowchart or block diagram can represent a module, a program segment or a part of the code, and the module, the program segment or a part of the code contains one or more executable instructions for realizing the specified logical function. In some alternative implementations, the functions marked in the box can also occur in a different order from the order marked in the accompanying drawings. For example, two consecutive boxes can actually be executed substantially in parallel, and they can sometimes be executed in the opposite order, which can depend on the functions involved. In the description corresponding to the flowchart and the block diagram in the accompanying drawings, the operations or steps corresponding to different boxes can also occur in a different order from the order disclosed in the description, and sometimes there is no specific order between different operations or steps. For example, two consecutive operations or steps can actually be executed substantially in parallel, and they can sometimes be executed in the opposite order, which can depend on the functions involved. Each block in the block diagrams and / or flowcharts, and combinations of blocks in the block diagrams and / or flowcharts, may be implemented by a dedicated hardware-based system that performs the specified functions or actions, or may be implemented by a combination of dedicated hardware and computer instructions.

Claims

1. A method for preventing dry burning of a stove, characterized in that: include: Detect the temperature information of the pot; When the temperature information of the cookware meets the boiling condition, obtaining the initial boiling temperature of the cookware; The initial boiling temperature of the cookware is the first boiling temperature of the cookware obtained after the cookware enters a boiling state, or the minimum value of multiple cookware temperatures detected in a boiling state; Obtaining the current boiling temperature of the pot; determining a first difference between the current boiling temperature and the initial boiling temperature; When the first difference satisfies a first condition, reducing the fire power of the stove; When the first difference does not satisfy the first condition, keeping the fire power of the stove unchanged; Among them, the first condition includes: the first difference is greater than the boiling temperature rise threshold; the boiling temperature rise threshold is used to express the reasonable increase range of the pot temperature in the boiling state of cooking with water.

2. The method according to claim 1, characterized in that The determining a first difference between the current boiling temperature of the cookware and the initial boiling temperature comprises: Obtain temperature values ​​of multiple boiling temperatures of the cookware within a first time period; In a case where the minimum value of the boiling temperature of the cooker is greater than the initial boiling temperature, the difference between the minimum value of the boiling temperature and the initial boiling temperature is determined as the first difference.

3. The method according to claim 2, characterized in that The higher the firepower of the stove is, the fewer the number of temperature values ​​for obtaining the boiling temperature of the pot is.

4. The method according to claim 1, characterized in that: The boiling temperature rise threshold is determined according to the fire power of the stove.

5. The method according to claim 4, characterized in that The higher the fire power of the stove is, the higher the value of the boiling temperature rise threshold is.

6. The method according to any one of claims 1 to 5, characterized in that: The initial boiling temperature of the cookware is the lowest temperature of the cookware within the second time period.

7. 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 execute the method for preventing dry burning of a cooker according to any one of claims 1 to 6 when executing the program instructions.

8. A cooking appliance, characterized in that: The invention comprises the device for preventing dry burning of a stove as claimed in claim 7.

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