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: obtaining temperature information of a pot; determining the anti-dry burning temperature of the stove according to the boiling temperature of the pot when the temperature information of the pot meets the boiling condition; and reducing the firepower when the temperature of the pot is greater than or equal to the anti-dry burning temperature. The anti-dry burning temperature of the stove is set according to the boiling temperature, which 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 anti-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 method and device for preventing dry burning of a cooker, and a cooker, so as to solve the technical problems in the related art that when the cooker is prevented from dry burning only by using a fixed threshold, the error is large and the anti-dry burning effect is limited.

[0006] In some embodiments, the method for preventing dry-burning of a stove includes: obtaining temperature information of a pot; when the temperature information of the pot meets a boiling condition, determining an anti-dry-burning temperature of the stove according to the boiling temperature of the pot; and when the temperature of the pot is greater than or equal to the anti-dry-burning temperature, reducing firepower.

[0007] Optionally, the boiling temperature of the cookware is an average temperature, a maximum temperature, or a minimum temperature of the cookware within a second set time period.

[0008] Optionally, the higher the boiling temperature of the pot, the higher the anti-dry-burning temperature of the stove.

[0009] Optionally, the anti-dry burning temperature is determined by:

[0010] T max =a×T+k

[0011] Among them, T max is the anti-dry-burning temperature of the stove, T is the boiling temperature of the pot, k is the correction parameter, and a is a weighted value greater than 0.

[0012] Optionally, the correction parameter k is determined according to one or more of the mass of the cookware, the thermal conductivity of the cookware, and the firepower of the stove.

[0013] Optionally, the boiling conditions include:

[0014] The pot temperature is within the boiling temperature range, and the temperature change value of the first set time period is less than a first threshold value.

[0015] Optionally, the first threshold is determined according to the fire power of the stove.

[0016] Optionally, the higher the fire power of the stove, the higher the value of the first threshold.

[0017] 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.

[0018] In some embodiments, the stove includes the above-mentioned device for preventing dry burning of the stove.

[0019] 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:

[0020] The anti-dry-burn temperature of the stove is determined according to the boiling temperature of the pot in the boiling state, and the anti-dry-burn control of the stove is performed according to the numerical relationship between the temperature of the pot and the anti-dry-burn temperature. When using different pots, different ingredients, and different firepower for cooking, the boiling temperature is quite different, and different anti-dry-burn temperature settings are achieved. The anti-dry-burn temperature of the stove can be set according to the cooking state, and is not limited by factors such as the type of pot, the type of cooking food, etc. It has a wide range of applications and is more accurate and timely in judging the anti-dry-burn.

[0021] 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

[0022] 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:

[0023] Figure 1 is a schematic diagram of a method for preventing dry burning of a stove provided by an embodiment of the present disclosure;

[0024] Figure 2 is a schematic diagram of another method for preventing dry burning of a stove provided by an embodiment of the present disclosure;

[0025] Figure 3 is a schematic diagram of another method for preventing dry burning of a stove provided by an embodiment of the present disclosure;

[0026] 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

[0027] 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.

[0028] The terms "first", "second", etc. in the specification and claims of the embodiments of the present disclosure and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the terms used in this way can be interchanged where appropriate, so that the embodiments of the embodiments of the present disclosure described herein. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions.

[0029] Unless otherwise stated, the term "plurality" means two or more.

[0030] 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.

[0031] 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.

[0032] like Figure 1 As shown, a method for preventing dry burning of a stove provided by an embodiment of the present disclosure includes:

[0033] Step S100, detecting the temperature information of the cookware.

[0034] 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.

[0035] Step S110, when the temperature information of the cooker meets the boiling condition, determining the anti-dry-burning temperature of the cooker according to the boiling temperature of the cooker.

[0036] Here, the boiling condition is used to express the control conditions related to the cooking state of the pot. When the temperature information of the pot meets the boiling condition, it is used to determine that the current cooking state is cooking with water. At this time, the dry-burning temperature of the stove is determined by obtaining the boiling temperature of the pot, and an anti-dry-burning strategy is established based on the implementation of cooking parameters.

[0037] Step S120, when the temperature of the pot is greater than or equal to the anti-dry-burning temperature, reduce the fire power.

[0038] 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.

[0039] The method for preventing dry burning of a stove provided by the embodiment of the present disclosure determines the anti-dry burning temperature of the stove according to the boiling temperature of the pot in the boiling state, and performs the anti-dry burning control of the stove according to the numerical relationship between the temperature of the pot and the anti-dry burning temperature. When different pots, different ingredients, and different fire powers are used for cooking, the boiling temperatures vary greatly, thereby achieving different anti-dry burning temperature settings, and being able to set the anti-dry burning temperature of the stove according to the cooking state, without being restricted by factors such as the type of pot and the type of food being cooked, having a wide range of applications, and making the judgment on the anti-dry burning more accurate and timely.

[0040] Optionally, the boiling temperature of the cookware is an average temperature, a maximum temperature, or a minimum temperature of the cookware within the second set time period.

[0041] Generally, when the pot is in a boiling state (cooking with water), the temperature of the pot is relatively stable, fluctuating within a certain temperature range without frequent temperature changes.

[0042] Here, the boiling temperature is obtained based on the average temperature of multiple temperature values ​​of the cooker within a set time to determine the anti-dry-burn temperature for controlling the cooker, which can reduce the impact of mismeasurement on the anti-dry-burn control and improve the accuracy of the anti-dry-burn judgment.

[0043] However, the highest temperature of multiple temperature values ​​within the set time can better reflect the impact of the stove firepower or cooking ingredients or the amount of water in the pot on the boiling temperature than the average temperature. Therefore, by setting the temperature for the stove to prevent dry burning according to the highest temperature of multiple temperature values ​​within the set time, it is possible to obtain an anti-dry burning temperature that is more in line with the actual cooking situation and improve the accuracy of the anti-dry burning judgment.

[0044] On the other hand, the anti-dry-burning temperature set according to the lowest temperature of multiple temperature values ​​within the set time, compared with the setting method of the above two parameters, improves the accuracy of anti-dry-burning judgment and further reduces the impact of dry-burning on the cookware.

[0045] Optionally, the higher the boiling temperature of the pot, the higher the anti-dry-boiling temperature of the stove.

[0046] Here, the corresponding relationship between the anti-dry-burning temperature of the cooker and the boiling temperature of the pot can be preset in the cooker controller, and the value of the anti-dry-burning temperature corresponding to the boiling temperature of the pot can be obtained by searching the correlation relationship. The correlation relationship can also be pre-stored in other smart home appliances connected to the cooker, and the correlation relationship can be retrieved during the communication between the smart home appliance and the cooker to determine the anti-dry-burning temperature according to the boiling temperature of the cooker.

[0047] In this embodiment, the boiling temperature of the pot is positively correlated with the anti-dry-burning temperature of the stove. The higher the boiling temperature of the pot, the higher the anti-dry-burning temperature of the stove; the lower the boiling temperature of the pot, the lower the anti-dry-burning temperature of the stove. When the boiling temperature of the pot is high, a higher anti-dry-burning temperature of the stove is set, so as to avoid the situation where the stove misjudges dry-burning and reduces the firepower; when the boiling temperature of the pot is low, a lower anti-dry-burning temperature is set, so as to avoid dry-burning for too long.

[0048] Optionally, the anti-dry burning temperature is determined by:

[0049] T max =a×T+k (1)

[0050] Among them, T max is the anti-dry-burning temperature of the stove, T is the boiling temperature of the pot, k is the correction parameter, and a is a weighted value greater than 0.

[0051] In this way, the anti-dry-boiling temperature of the cooker can be set by the boiling temperature obtained in real time according to Formula 1. The higher the boiling temperature of the pot, the higher the anti-dry-boiling temperature of the cooker.

[0052] The anti-dry-burn temperature obtained by Formula 1 does not need to pre-store a limited number of anti-dry-burn temperature values ​​in the system, but can be obtained through the boiling temperature value obtained in real time, thereby achieving a one-to-one correspondence between the boiling temperature value and the anti-dry-burn temperature value.

[0053] Optionally, the correction parameter k is determined according to one or more of the mass of the cookware, the thermal conductivity of the cookware, and the firepower of the stove.

[0054] In this way, when the anti-dry-burn temperature is set according to the boiling temperature of the cookware, a more accurate anti-dry-burn temperature can be further obtained according to the actual cooking situation.

[0055] Here, the pot mass can be obtained by a weight sensor disposed on the cooker body. The pot mass used to determine the correction parameter may include one or more of the pot mass value, the pot mass change value within a set time, and the change rate of the pot mass within a set time.

[0056] For example, a correction parameter can be set according to the weight of the pot when it enters the cooking state to achieve the correction of the anti-dry-burning temperature set according to the boiling temperature. Here, the higher the weight of the pot, the higher the value of the correction parameter k; the smaller the weight of the pot, the lower the value of the correction parameter k. Generally, there may be two reasons for the large weight value of the pot. On the one hand, the pot itself is heavier, and the bottom of the pot is thicker, so its anti-dry-burning performance is higher; on the other hand, there are more cooking ingredients or more water content in the pot, and the anti-dry-burning performance of the pot under this cooking condition is also higher. Therefore, at this time, setting the correction parameter according to the weight of the pot to set a higher anti-dry-burning temperature can avoid the situation where the stove misjudges dry burning and reduces the firepower.

[0057] For another example, a correction parameter can be set according to the change value of the pot mass within a set time when the pot is in a boiling state, so as to realize the correction of the anti-dry-burning temperature set according to the boiling temperature. Here, in the boiling state, the pot is in a water cooking state, and the firepower of the pot and the stove reaches a temporary heat transfer balance. The heat will be mainly transferred to the water and food in the pot. Since the specific heat capacity of water is large, most of the change in the mass of the pot within a period of time is caused by the evaporation of domestic water. Therefore, the anti-dry-burning temperature is corrected according to the change value of the pot mass within the set time, so that the numerical setting of the anti-dry-burning temperature is dynamic and changes with the change of the cooking stage. Here, the smaller the change value of the pot mass, the smaller the value of the correction coefficient k; the larger the change value of the pot mass, the larger the value of the correction coefficient k. By setting the correction parameter according to the weight change of the pot, a dynamic anti-dry-burning temperature can be set to improve the accuracy of anti-dry-burning.

[0058] For another example, a correction parameter can be set according to the rate of change of the mass of the pot within a set time when the pot is in a boiling state, so as to realize the correction of the anti-dry-burning temperature set according to the boiling temperature. As in the above embodiment, the mass change of the pot in a boiling state is mostly caused by the evaporation of water in the pot. Therefore, according to the mass change rate of the pot within a set time, the trend of the water evaporation mass can be obtained, so as to realize that when the value of the change rate is small, the set anti-dry-burning temperature can be corrected in time to improve the accuracy of the anti-dry-burning. Here, the higher the mass change rate, the higher the value of the correction coefficient k, and the lower the mass change rate, the lower the value of the correction coefficient k.

[0059] The thermal conductivity of the cookware can be determined according to the change of the cookware temperature with the firepower after the cookware enters the cooking state. Generally, the higher the thermal conductivity of the cookware, the lower the value of the correction coefficient k; the lower the thermal conductivity of the cookware, the higher the value of the correction coefficient k.

[0060] The firepower of the cooking appliance can be obtained through the valve opening of the gas cooking appliance, for example, through a rheostat arranged on the gas cooking appliance and coaxially linked with the gas valve. Usually, when the gas valve is in the middle position, the opening is the largest, and it gradually decreases in both 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 the absolute value is used for description in this embodiment.

[0061] Optionally, the firepower of the cooking appliance can also be obtained through a firepower detection sensor. The firepower detection sensor can be a rotatable potentiometer installed on the knob column of the cooking appliance switch, and the firepower adjustment gear of the cooking appliance is obtained by sensing the change of the resistance, voltage or current of the potentiometer, and then the firepower size of the cooking appliance is further judged. In another embodiment, the firepower detection sensor can also be a gas flow rate sensing device installed on the gas pipeline, and the firepower size of the cooking appliance is judged by sensing the flow rate of the gas. In still another embodiment, the firepower detection sensor can be a gas pressure sensing device installed on the gas pipeline, and the firepower size of the cooking appliance is judged by sensing the gas pressure. Of course, the cooking appliance can also be an induction cooker. At this time, the firepower of the induction cooker can be judged by detecting the current size or the firepower gear of the supply coil; the firepower can be divided into multiple gears, such as 1st gear, 2nd gear, 3rd gear, 4th gear and 5th gear, etc. In one embodiment, the firepower is divided into 3 gears, the 1st gear is low fire, the 2nd gear is medium fire, and the 3rd gear is high fire. The first preset firepower is P1 and the second preset firepower is P2. For example, when the detected firepower P < P1, it is judged that the current firepower level is low fire; when the detected firepower P1 ≤ P ≤ P2, it is judged that the current firepower level is medium fire; when the detected firepower P > P2, it is judged that the current firepower level is high fire.

[0062] Optionally, the higher the firepower of the cooking appliance, the greater the value of the correction coefficient. In the boiling state, the greater the firepower of the cooking appliance, the higher the heating degree, and the greater the range of the change of the cookware temperature; the smaller the firepower of the cooking appliance, the lower the heating degree, and the more stable the temperature of the cookware.

[0063] Optionally, the boiling conditions include: the cookware temperature is within the boiling temperature range, and the temperature change value within the first set duration is less than the first threshold.

[0064] The boiling temperature range is determined according to the firepower of the cooking appliance. Within this boiling temperature range, the cookware is in a high temperature state and can maintain a good use state. Optionally, the lower limit value of this boiling temperature range is B min , and the upper limit value of this 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.

[0065] The first 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 first threshold is used to express the range of the fluctuation state. When the temperature change value of the pot is less than the first threshold, it proves that the temperature of the pot meets the temperature characteristics of the boiling state.

[0066] Optionally, the first threshold is determined according to the firepower of the stove. The first threshold is determined in the following manner: the firepower of the stove is obtained, and the value of the first 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 first threshold, and the association relationship can be pre-stored in the controller of the stove, or 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 first threshold according to the firepower of the stove, so as to form the boiling condition of the pot.

[0067] Optionally, the higher the firepower of the stove is, the larger the value of the first threshold is. According to the linear relationship between the firepower of the stove and the first threshold, there is a positive correlation between the first threshold and the firepower of the stove. The greater the firepower of the stove is, the higher the value of the first threshold for forming the boiling condition of the pot is; the smaller the firepower of the stove is, the lower the value of the first threshold is.

[0068] 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 the time periods of some or all detection cycles are different.

[0069] 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.

[0070] The method for preventing dry burning of a stove provided by the embodiment of the present disclosure determines the anti-dry burning temperature of the stove according to the boiling temperature of the pot in the boiling state, and performs the anti-dry burning control of the stove according to the numerical relationship between the temperature of the pot and the anti-dry burning temperature. When different pots, different ingredients, and different fire powers are used for cooking, the boiling temperatures vary greatly, thereby achieving different anti-dry burning temperature settings, and being able to set the anti-dry burning temperature of the stove according to the cooking state, without being restricted by factors such as the type of pot and the type of food being cooked, having a wide range of applications, and making the judgment on the anti-dry burning more accurate and timely.

[0071] 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:

[0072] Step S200, detecting the temperature information of the cooker and the fire power of the stove.

[0073] 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.

[0074] 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.

[0075] 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.

[0076] 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 a boiling temperature range and a first threshold value.

[0077] 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.

[0078] Step S220: When the pot temperature is within the boiling temperature range and the temperature change value of the first set time is less than the first threshold, the current pot temperature is obtained as the boiling temperature, so as to establish a control strategy for preventing dry burning according to the boiling temperature of the pot in the water cooking state.

[0079] Optionally, after obtaining the current pot temperature as the boiling temperature, the method further includes: when the boiling temperature is obtained for the first time, determining that the current boiling temperature is the initial boiling temperature; otherwise, determining whether to update the initial boiling temperature according to the value of the boiling temperature obtained this time.

[0080] 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.

[0081] Step S230, setting the anti-dry-burning temperature of the cooker according to the boiling temperature; when the temperature of the cooker is greater than or equal to the anti-dry-burning temperature, reducing the firepower; otherwise, keeping the firepower unchanged.

[0082] Optionally, after setting the anti-dry-burning temperature of the stove according to the boiling temperature, the method further includes: obtaining the firepower of the stove, and correcting the anti-dry-burning temperature according to the firepower of the stove.

[0083] The method for preventing dry burning of a stove provided by the embodiment of the present disclosure determines the anti-dry burning temperature of the stove according to the boiling temperature of the pot in the boiling state, and performs the anti-dry burning control of the stove according to the numerical relationship between the temperature of the pot and the anti-dry burning temperature. When different pots, different ingredients, and different fire powers are used for cooking, the boiling temperatures vary greatly, thereby achieving different anti-dry burning temperature settings, and being able to set the anti-dry burning temperature of the stove according to the cooking state, without being restricted by factors such as the type of pot and the type of food being cooked, having a wide range of applications, and making the judgment on the anti-dry burning more accurate and timely.

[0084] 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:

[0085] Step S300, detecting the temperature information of the cooker and the fire power of the stove.

[0086] 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 one or more of a boiling temperature range and a first threshold value.

[0087] Step S320, determine whether the temperature information of the pot meets the boiling condition. If so, proceed to step S340, otherwise, proceed 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 first set time is less than the first threshold. The boiling temperature range and the first threshold are determined according to the firepower of the stove.

[0088] 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.

[0089] 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.

[0090] 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.

[0091] Step S350, setting the anti-dry-boiling temperature according to the boiling temperature of the pot. When the temperature of the pot is greater than or equal to the anti-dry-boiling temperature, reducing the firepower of the stove; when the temperature of the pot is less than the anti-dry-boiling temperature, keeping the firepower of the stove unchanged.

[0092] Here, the anti-dry-burn temperature is set according to the boiling temperature of the pot. When cooking with water, the temperature of the pot is relatively stable, maintaining fluctuations within a certain temperature range, and there will be no frequent temperature changes. However, when cooking with different pots, different ingredients, and different firepower, the boiling temperatures vary 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.

[0093] When the temperature of the cookware is greater than or equal to the anti-dry burning temperature, according to the technical solution of the embodiment of the present disclosure, it is determined that the cookware has dry burned, and the firepower is reduced until the fire is turned off and the gas is cut off. The cooker is controlled to send a dry burning alarm message to the smart home appliance to prompt the user, or an alarm is sounded through an audible and visual alarm to reduce the impact of dry burning on the cookware.

[0094] Optionally, when the pot temperature is lower than the anti-dry-boiling temperature, the method further includes:

[0095] According to the boiling temperature of the pot, perform the corresponding anti-dry boiling operation; or

[0096] Execute corresponding anti-dry-boiling operation according to the temperature change rate of the cookware; or

[0097] According to the initial boiling temperature of the pot, perform the corresponding anti-dry boiling operation.

[0098] Among them, 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; when the first difference is greater than or equal to the dry-burning temperature rise judgment value, reducing the firepower of the stove; when the first difference is less than the dry-burning temperature rise judgment value, keeping the firepower of the stove unchanged.

[0099] 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.

[0100] According to the temperature change rate of the cookware, the corresponding anti-dry-burning operation is performed, including: obtaining the temperature change rate of the cookware, and when the temperature change rate of the cookware 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 cooker; otherwise, keeping the firepower of the cooker unchanged

[0101] 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.

[0102] According to the initial boiling temperature of the cookware, the 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; when the first difference is greater than the boiling temperature rise threshold, reducing the firepower of the stove; when the first difference is less than or equal to the boiling temperature rise threshold, keeping the firepower of the stove unchanged.

[0103] Since pots have different boiling temperatures when made of different materials or with different cooking ingredients, changes in the state of ingredients during the cooking process will cause changes in the boiling temperature of the pot, and the temperature of the pot may change synchronously with the boiling temperature. For example, during the process of cooking 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, and they rise together when a dry-burning trend occurs. It is impossible to determine the timing of anti-dry-burning 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 timing of dry-burning can be determined based on the difference between the boiling temperature of the pot and the initial boiling temperature, thereby improving the accuracy of anti-dry-burning 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 represented 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 sounded through an audible and visual alarm to reduce the impact of dry burning on the pot.

[0104] 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.

[0105] The method for preventing dry burning of a stove provided by the embodiment of the present disclosure determines the anti-dry burning temperature of the stove according to the boiling temperature of the pot in the boiling state, and performs the anti-dry burning control of the stove according to the numerical relationship between the temperature of the pot and the anti-dry burning temperature. When different pots, different ingredients, and different fire powers are used for cooking, the boiling temperatures vary greatly, thereby achieving different anti-dry burning temperature settings, and being able to set the anti-dry burning temperature of the stove according to the cooking state, without being restricted by factors such as the type of pot and the type of food being cooked, having a wide range of applications, and making the judgment on the anti-dry burning more accurate and timely.

[0106] Figure 4 A device for preventing dry burning of a stove is shown. Figure 4As 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.

[0107] 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.

[0108] 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.

[0109] 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.

[0110] The disclosed embodiment also provides a stove, comprising the above-mentioned device for preventing dry burning of the stove.

[0111] 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.

[0112] Optionally, the stove can be an induction cooker or a gas stove. By setting a device for preventing dry burning, the boiling temperature of the pot in a boiling state can be obtained according to the temperature information of the pot placed on the stove for cooking, and the anti-dry burning temperature of the stove can be determined, and the anti-dry burning temperature of the stove can be controlled according to the numerical relationship between the temperature of the pot and the anti-dry burning temperature. When different pots, different ingredients, and different fire powers are used for cooking, the boiling temperatures vary greatly, and different anti-dry burning temperature settings can be achieved. The anti-dry burning temperature of the stove can be set according to the cooking state, and is not limited by factors such as the type of pot and the type of food being cooked. It has a wide range of applications, and the judgment of anti-dry burning is more accurate and timely.

[0113] 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.

[0114] 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.

[0115] The computer-readable storage medium mentioned above may be a transient computer-readable storage medium or a non-transitory computer-readable storage medium.

[0116] 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.

[0117] 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.

[0118] 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.

[0119] 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.

[0120] 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: Get the temperature information of the pot; When the temperature information of the cooker meets the boiling condition, determining the anti-dry-burning temperature of the cooker according to the boiling temperature of the cooker; When the temperature of the pot is greater than or equal to the anti-dry-burning temperature, reducing the fire power; When the temperature of the pot is lower than the anti-dry-boiling temperature, a corresponding anti-dry-boiling operation is performed according to the initial boiling temperature of the pot; Among them, 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 cooker; determining a first difference between the current boiling temperature and the initial boiling temperature; When the first difference is greater than the boiling temperature rise threshold, reducing the fire power of the stove; When the first difference is less than or equal to the boiling temperature rise threshold, the fire power of the stove is kept unchanged.

2. The method according to claim 1, characterized in that The boiling temperature of the cookware is the average temperature, the highest temperature or the lowest temperature of the cookware within the second set time period.

3. The method according to claim 1, characterized in that The higher the boiling temperature of the pot is, the higher the anti-dry-burning temperature of the stove is.

4. The method according to claim 3, characterized in that The anti-dry burning temperature is determined by the following method: T max =a×T+k Among them, T max is the anti-dry-burning temperature of the stove, T is the boiling temperature of the pot, k is the correction parameter, and a is a weighted value greater than 0.

5. The method according to claim 4, characterized in that The correction parameter k is determined according to one or more of the mass of the cookware, the thermal conductivity of the cookware, and the firepower of the stove.

6. The method according to any one of claims 1 to 5, characterized in that: The boiling conditions include: The pot temperature is within the boiling temperature range, and the temperature change value of the first set time period is less than a first threshold value.

7. The method according to claim 6, characterized in that The first threshold is determined according to the fire power of the stove.

8. The method according to claim 7, characterized in that The higher the fire power of the stove is, the higher the value of the first threshold is.

9. 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 8 when executing the program instructions.

10. A cooking appliance, characterized in that: The invention comprises the device for preventing dry burning of a stove as claimed in claim 9.

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