CN114251684A

CN114251684A - Dry burning prevention method and device for kitchen range and kitchen range

Info

Publication number: CN114251684A
Application number: CN202011017141.6A
Authority: CN
Inventors: 郑健; 李海平; 吴勇; 王京华; 贺立军; 马常强; 陈汉臻
Original assignee: Qingdao Haier Intelligent Cooking Appliances Co Ltd; Qingdao Haier Smart Technology R&D Co Ltd; Haier Smart Home Co Ltd
Current assignee: Qingdao Haier Intelligent Cooking Appliances Co Ltd; Qingdao Haier Smart Technology R&D Co Ltd; Haier Smart Home Co Ltd
Priority date: 2020-09-24
Filing date: 2020-09-24
Publication date: 2022-03-29

Abstract

The application relates to the technical field of intelligent household appliances, and discloses a method for preventing dry burning of a kitchen range, which comprises the following steps: detecting temperature information of the cookware; under the condition that the temperature information of the cookware meets the boiling condition, acquiring the temperature change rate of the cookware within a set time; and executing corresponding dry burning prevention operation according to the temperature change rate of the cookware. By establishing the correlation between the cooking state of the cooker and factors such as the temperature change rate, the control strategy for preventing dry burning is determined according to the temperature change rate of the cooker in the boiling state, the control strategy is not limited by factors such as the type of the cooker and the type of cooked food, the application range is wide, and the judgment on the dry burning prevention is more accurate and timely. The application also discloses a device and cooking utensils that are used for cooking utensils to prevent dry combustion method.

Description

Dry burning prevention method and device for kitchen range and kitchen range

Technical Field

The application relates to the technical field of intelligent household appliances, in particular to a method and a device for preventing dry burning of a stove and the stove.

Background

The dry heating refers to heating an empty pot for a long time, the pot is dried and burnt due to overlong heating time, the safety hazard that the pot is often found in a kitchen is caused, the pot is discolored and deformed due to the dry heating, and a fire disaster can be caused in serious cases. At present, the common dry burning prevention function in the household cooker realizes the dry burning prevention control on the cooker by automatically closing the cooker when the cooker reaches a set threshold value, and plays a role in protecting the cooker.

In the process of implementing the embodiments of the present disclosure, it is found that at least the following problems exist in the related art:

in the related art, the temperature of the pot bottom is higher than a preset single temperature threshold value through comparison with the preset single temperature threshold value, and the occurrence of dry burning is judged. Neglected other changeable factors among the culinary art process, can't execute real-time prevent dry combustion method control according to the change of pan in culinary art process, lead to the pan to judge by mistake earlier under the condition of actually not taking place dry combustion method easily, prevent that dry combustion method effect is limited.

Disclosure of Invention

The embodiment of the disclosure provides a cooker, and a method and a device for preventing dry burning of the cooker, so as to solve the technical problems that in the related art, when dry burning prevention control is performed on a cooker only through a fixed threshold value, the error is large, and the dry burning prevention effect is limited.

In some embodiments, the method for preventing dry-burning of a cooktop comprises: detecting temperature information of the cookware; under the condition that the temperature information of the cookware meets the boiling condition, acquiring the temperature change rate of the cookware within a set time; and executing corresponding dry burning prevention operation according to the temperature change rate of the pot.

Optionally, the executing, according to the temperature change rate of the pot, a corresponding dry-heating prevention operation includes:

under the condition that the temperature change rate of the cookware meets a first condition, reducing the firepower of the cooker;

and under the condition that the temperature change rate of the cookware does not meet the first condition, keeping the firepower of the cooker unchanged.

Optionally, the rate of change of temperature of the pot comprises the rate of change of temperature of the pot over a plurality of detection periods.

Optionally, the detection durations of part or all of the detection periods are different.

Optionally, the higher the fire of the cooktop, the lower the number of detection cycles.

Optionally, the first condition comprises:

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

Optionally, the first threshold is determined according to the fire power of the cooker; and/or the presence of a gas in the gas,

the second threshold value is determined according to the firepower of the cooker.

Optionally, the boiling conditions comprise:

the temperature of the cookware is within the boiling temperature interval, and the temperature change value of the first set duration is less than a third threshold value.

In some embodiments, the device for preventing dry-heating of a cooking appliance comprises a processor and a memory storing program instructions, wherein the processor is configured to execute the method for preventing dry-heating of the cooking appliance when executing the program instructions.

In some embodiments, the cooktop includes the above-described device for preventing dry-burning of the cooktop.

The method and the device for preventing dry burning of the stove and the stove provided by the embodiment of the disclosure can realize the following technical effects:

by establishing the correlation between the cooking state of the cooker and factors such as the temperature change rate, the control strategy for preventing dry burning is determined according to the temperature change rate of the cooker in the boiling state, the control strategy is not limited by factors such as the type of the cooker and the type of cooked food, the application range is wide, and the judgment on the dry burning prevention is more accurate and timely.

The foregoing general description and the following description are exemplary and explanatory only and are not restrictive of the application.

Drawings

One or more embodiments are illustrated by way of example in the accompanying drawings, which correspond to the accompanying drawings and not in limitation thereof, in which elements having the same reference numeral designations are shown as like elements and not in limitation thereof, and wherein:

fig. 1 is a schematic diagram of a method for preventing dry burning of a cooker according to an embodiment of the present disclosure;

FIG. 2 is a schematic diagram of another method for preventing dry burning of a cooker provided by the embodiment of the disclosure;

FIG. 3 is a schematic diagram of another method for preventing dry burning of a cooktop provided by an embodiment of the disclosure;

fig. 4 is a schematic view of a device for preventing dry burning of a cooker provided by an embodiment of the disclosure.

Detailed Description

So that the manner in which the features and elements of the disclosed embodiments can be understood in detail, a more particular description of the disclosed embodiments, briefly summarized above, may be had by reference to the embodiments, some of which are illustrated in the appended drawings. In the following description of the technology, for purposes of explanation, numerous details are set forth in order to provide a thorough understanding of the disclosed embodiments. However, one or more embodiments may be practiced without these details. In other instances, well-known structures and devices may be shown in simplified form in order to simplify the drawing.

The terms "first," "second," and the like in the description and in the claims, and the above-described drawings of embodiments of the present disclosure, are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It should be understood that the data so used may be interchanged under appropriate circumstances such that embodiments of the present disclosure described herein may be made. Furthermore, the terms "comprising" and "having," as well as any variations thereof, are intended to cover non-exclusive inclusions.

The term "plurality" means two or more unless otherwise specified.

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

The term "and/or" is an associative relationship that describes objects, meaning that three relationships may exist. For example, a and/or B, represents: a or B, or A and B.

As shown in fig. 1, a method for preventing dry-heating of a kitchen range provided by an embodiment of the present disclosure includes:

step S100, detecting temperature information of the cookware.

Generally, when the cooker is used for heating a pot, the temperature information of the pot may include a pot bottom temperature, a temperature rise rate thereof based on a temperature and time variation relationship, and a variation rate of the temperature rise rate. The temperature parameter can be obtained by a temperature detection device arranged at the cooking range or the pot bottom, and the time parameter can be obtained by a timer on the cooking range or the pot.

Step S110, under the condition that the temperature information of the cookware meets the boiling condition, acquiring the temperature change rate of the cookware.

Here, the boiling condition is used for expressing a control condition related to a cooking state of the pot, and is used for determining that the current cooking state is water cooking when the temperature information of the pot meets the boiling condition, so as to establish an association relationship between the pot temperature information and the cooking state and execute an anti-dry heating operation related to the cooking state.

And under the condition that the temperature information of the pot conforms to the boiling condition, determining that the current cooking state is a water cooking state, and acquiring the temperature change rate of the pot.

The temperature change rate of the pot is based on the temperature change interval and temperature rise of the potAnd (4) determining the time. For example, a first temperature variation interval [ T1, T2 ] is detected and obtained in the first detection period T1]Then the temperature change rate k₁＝(T2-T1)/t1。

Step S120, according to the temperature change rate of the cookware, executing corresponding dry burning prevention operation.

Different pans are because of the influence of reasons such as cooking food materials, pan materials, and the like, and the heat transfer rate that it is heated is different, has different temperature change rate, consequently according to the relevance of temperature change rate and culinary art state, can confirm the control strategy who is used for preventing dry combustion method according to this, does not receive the restriction of factors such as pan type, culinary art food kind, and accommodation is wide, and is more accurate timely to the judgement of preventing dry combustion method.

Optionally, according to the temperature change rate of the pot, executing corresponding dry-heating prevention operation, including: under the condition that the temperature change rate of the cookware meets a first condition, reducing the firepower of the cooker; under the condition that the temperature change rate of the cookware does not meet the first condition, the firepower of the cooker is kept unchanged.

Reduce the firepower of cooking utensils, include according to the anti-dry combustion method of pan, reduce the gas supply volume of cooking utensils, reduce current cooking utensils firepower gear, reduce one or more in the supply current of electromagnetic oven. Here, the reduction of the fire power of the cooker may be to keep the cooker in a smaller heat supply state after reducing the fire power, or to reduce the fire power until the cooker is turned off and the gas is cut off (power off), and to stop supplying heat to the cooker.

Here, the first condition is used for expressing the condition related to the temperature change rate of the cooker when the dry-burning condition occurs in the water cooking state, and the first condition is used for controlling the cooker to reduce the firepower or stop heating when the temperature change rate of the cooker meets the condition, so that the dry-burning problem is prevented.

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

Generally, in a water cooking state, the temperature of a pot is relatively stable, is maintained at a certain temperature, does not have frequent temperature change, and has a low temperature change rate; when dry burning occurs, the temperature of the pot rises rapidly, and the temperature change rate is also increased rapidly, so that according to the technical scheme of the embodiment of the disclosure, the dry burning of the pot is judged, the firepower is reduced, and the influence of the dry burning on the pot can be reduced.

Here, the first threshold is used for expressing a range value of a reasonable change rate of the temperature of the cooker in a water cooking state; the second threshold is used for expressing the change condition of the temperature change rate of the cookware. Under the condition that the temperature change rate of the cookware is greater than a first threshold value, the temperature of the cookware is rapidly increased; and the change rate of the temperature change rate of the cookware, namely the second derivative of the temperature change condition of the cookware, which is obtained in a plurality of detection periods, is used for further judging the temperature change condition of the cookware. And under the condition that the change rate of the temperature change rate of the cookware is smaller than a second threshold value, the temperature change rate of the cookware is in a stable rising condition, the temperature change condition of the cookware is further determined when the current temperature change rate of the cookware meets the dry burning condition under the water cooking state, and the dry burning of the cookware is determined to execute a corresponding dry burning prevention strategy when the temperature change condition of the cookware meets the condition.

Wherein the first threshold value is determined according to the firepower of the cooker; and/or the second threshold is determined according to the firepower of the cooking appliance.

Here, the fire power of the cooker and the first threshold value and/or the corresponding relationship between the fire power of the cooker and the second threshold value may be preset in the cooker controller, and the values of the first threshold value and the second threshold value corresponding to the current fire power of the cooker may be obtained by searching the association relationship. The incidence relation can also be pre-stored in other intelligent household appliances connected with the stove, and the incidence relation is called in the process of mutual communication between the intelligent household appliances and the stove, so that the values of the first threshold and the second threshold can be determined according to the firepower of the stove.

The firepower of the gas cooker can be acquired through the valve opening of the gas cooker, for example, through a rheostat which is arranged on the gas cooker and coaxially linked with the gas valve. Generally, the gas valve has a maximum opening at a middle position, and the opening gradually decreases in both the forward and reverse directions. In the present embodiment, the gas valve is in the neutral position, the opening is nominally 0, and the two minimum positions are 0.5, -0.5, respectively, and are described in absolute terms in the present embodiment.

Optionally, the firepower of the stove can be acquired through the firepower detection sensor. The fire detection sensor can be a rotatable potentiometer arranged on a knob column of a stove switch, and the fire of the stove is further judged by acquiring a fire adjusting gear of the stove through sensing the resistance, voltage or current change of the potentiometer. In another embodiment, the fire detection sensor can also be a gas flow velocity sensing device arranged on a gas pipeline, and the fire of the cooker is judged by sensing the flow velocity of gas. In another embodiment, the fire detection sensor may be a gas pressure sensing device installed on the gas pipeline, and the fire of the stove is judged by sensing the pressure of the gas. Certainly, the stove can also be an electromagnetic stove, and the firepower of the electromagnetic stove can be judged by detecting the current supplied to the coil or the firepower gear; the fire power can be divided into a plurality of gears, such as 1 gear, 2 gear, 3 gear, 4 gear, 5 gear and the like. In one embodiment, the firepower is divided into 3 gears, the 1 gear is a small fire, the 2 gear is a medium fire, the 3 gear is a large fire, the first preset firepower is P1 and the second preset firepower is P2, such that when the detected firepower P < P1, the current firepower level is determined to be a small fire, when the detected firepower P1 ≦ P2, the current firepower level is determined to be a medium fire, and when the detected firepower P > P2, the current firepower level is determined to be a large fire.

Optionally, the higher the firepower of the cooker is, the larger the value of the first threshold is. According to the linear relation between the pre-stored firepower of the cooker and the change rate value used for expressing reasonable temperature, the first threshold value and the firepower of the cooker are in positive correlation. In a boiling state, the larger the firepower of the cooker is, the higher the heating degree is, the faster the temperature change rate of the cooker is when dry burning occurs, and the larger the numerical value is; on the contrary, the smaller the firepower of the cooker is, the lower the heating degree is, the lower the temperature change rate of the cooker is when dry burning occurs, and the numerical value is smaller.

Optionally, the higher the firepower of the cooker is, the larger the value of the second threshold is. According to the linear relation between the pre-stored firepower of the cooker and the change rate used for expressing reasonable temperature change rate, the second threshold value and the firepower of the cooker are in positive correlation. In a boiling state, the larger the firepower of the cooker is, the higher the heating degree is, the faster the temperature change rate of the cooker is when dry burning occurs, and the larger the change rate of the temperature change rate is; on the contrary, the smaller the firepower of the cooker is, the lower the heating degree is, the lower the change rate of the temperature change rate of the cooker is when dry burning occurs, and the numerical value is smaller.

Optionally, the rate of change of temperature of the pot comprises a rate of change of temperature of the pot over a plurality of detection periods.

Therefore, the first condition is continuously and repeatedly met according to the temperature change rate of a plurality of detection periods, the probability of occurrence of the situation of dry burning prevention control triggered by misdetection is reduced, and the accuracy of dry burning prevention judgment is improved.

Optionally, the detection durations of part or all of the detection periods are different. According to the temperature change rate obtained in different detection time lengths, the temperature change of the cookware in different time lengths is obtained, and the judgment on the temperature change rate is more accurate.

Here, a corresponding relationship between the firepower of the cooker and the detection periods may be preset in the cooker controller, where the corresponding relationship includes a one-to-one corresponding relationship between the firepower of the cooker and the number of the detection periods, and a value of the number of the detection periods corresponding to the firepower of the current cooker may be obtained by searching the associated relationship, so as to determine the number of the detection periods, that is, the number of the obtained temperature change rates, in the case of the firepower of the current cooker. The incidence relation can also be pre-stored in other intelligent household appliances connected with the kitchen range, and the incidence relation is called in the process of mutual communication between the intelligent household appliances and the kitchen range.

Optionally, the boiling conditions include: the temperature of the cookware is within the boiling temperature interval, and the temperature change value of the first set time length is less than a third threshold value.

The boiling temperature interval is determined according to the fire power of the cooker. Within the boiling temperature range, at the potCan be maintained in a high temperature state and a better use state. Optionally, the lower limit value of the boiling temperature interval is B_minThe upper limit value of the boiling temperature interval is B_max. Lower limit value B of boiling temperature interval_minAnd an upper limit value B_maxIs determined according to the firepower of the cooker and is in positive correlation with the firepower of the cooker. When the temperature of the pan is in the boiling temperature interval, the pan is in a state that the heating cooking is started and no danger of dry burning exists.

The third threshold value is a value for expressing a temperature range in a boiling state. Generally, when the pot enters the boiling state, the temperature of the pot is in a stable small-range fluctuation state, and the third threshold is used for expressing the range of the fluctuation state. And under the condition that the temperature change value of the pot is smaller than the third threshold value, the temperature of the pot is proved to accord with the temperature characteristic of the boiling state.

Optionally, the third threshold is determined from the cooktop fire. The third threshold is determined by: the method comprises the steps of obtaining firepower of a cooker, obtaining a value of a third threshold corresponding to the firepower of the current cooker by searching a pre-stored incidence relation, wherein the pre-stored incidence relation comprises a one-to-one correspondence relation between the firepower of the cooker and the third threshold, the incidence relation can be pre-stored in a controller of the cooker, the incidence relation can also be pre-stored in other intelligent household appliances connected with the cooker, and in the process of mutual communication between the intelligent household appliances and the cooker, the incidence relation is called, so that the value of the third threshold is determined according to the firepower of the cooker, and the boiling condition of the cooker is formed.

Optionally, the higher the firepower of the cooker is, the larger the value of the third threshold is. According to the linear relation between the firepower of the cooker and the third threshold value, the third threshold value and the firepower of the cooker are in positive correlation. The larger the firepower of the cooker is, the higher the value of the third threshold value for forming the boiling condition of the cooker is; the smaller the firepower of the stove is, the lower the value of the third threshold value is.

Optionally, the temperature change value in the first set duration is a maximum value of the temperature change values of the plurality of detection periods in the first set duration. Wherein the duration of part or all of the detection periods is different.

Optionally, after obtaining the temperature variation value, when the temperature of the pot is lower than the lower limit value B of the boiling temperature interval_minIn the case of (1), the lower limit value B of the boiling temperature interval is updated according to the temperature value collected last time_min. Meanwhile, considering that the reason for the temperature drop may be that new food materials such as water and vegetables are added in the cooking process, when the base temperature is lower than the lower limit value B of the boiling temperature interval_minAnd when the temperature is detected, clearing all the acquired data and restarting the temperature acquisition.

By adopting the method for preventing dry burning of the cooker, the control strategy for preventing dry burning is determined according to the temperature change rate of the cooker in the boiling state by establishing the correlation between the cooking state of the cooker and the factors such as the temperature change rate, the method is not limited by the factors such as the type of the cooker and the type of the cooking food, the application range is wide, and the judgment on the dry burning prevention is more accurate and timely.

Fig. 2 is a schematic flow chart of another method for preventing dry burning of a cooker according to an embodiment of the present disclosure, and as shown in fig. 2, the method for preventing dry burning of a cooker includes:

and S200, detecting the temperature information of the cooker and the firepower of the cooker.

Optionally, before detecting the temperature information of pan and the firepower of cooking utensils, still include: acquiring a first starting temperature threshold value for starting temperature acquisition; when the temperature of the cooker is greater than the first starting temperature threshold value, firepower and temperature information of the cooker are acquired. Here, the first starting temperature threshold is used for expressing the temperature range of a part or all of the cookware in the safe cooking state in the cooking process. Like this, just when the temperature value of pan surpassed first start temperature threshold value, just begin to carry out continuous or spaced temperature acquisition for dry combustion method judges. Optionally, the first start-up temperature threshold has a value in a range of 170 ℃ to 195 ℃, and may be 170 ℃, 175 ℃, 180 ℃, 185 ℃, 190 ℃, or 195 ℃.

Optionally, when detecting the temperature information of pan, still include: acquiring temperature information count of the cookware acquired according to the temperature acquisition time interval; and under the condition that the temperature information does not meet the first condition, when the temperature count is greater than a first count threshold value, updating the first starting temperature threshold value according to the temperature value acquired last time.

Here, the temperature information count is used to indicate the number of currently acquired pot temperature information, and the first count threshold value indicates the maximum value of the number of acquired temperature information. Optionally, the first count threshold is set to 80, and may be set to other values according to the use environment of the cooker, which is not limited herein. In this embodiment, only the most recent 80 data items are saved.

And step S210, determining a value of a corresponding dry burning prevention parameter according to the firepower of the stove. Wherein the dry burning prevention parameter comprises one or more of a boiling temperature interval, a first threshold, a second threshold and a third threshold.

Here, the anti-dry heating parameters can be obtained through the corresponding relationship pre-stored in the cooker at the beginning stage of cooking, and can also be obtained in the cooking process.

Step S220, under the condition that the temperature of the cookware is within the boiling temperature range and the temperature change value of the first set time length is smaller than a third threshold value, the temperature change rate of the cookware within the set time length is obtained. And under the condition of establishing a water cooking state, a control strategy for preventing dry burning is carried out according to the heating rate of the pot.

Step S230, reducing the firepower of the cooker under the condition that the temperature change rate of the cooker is greater than a first threshold value and the change rate of the temperature change rate is less than a second threshold value; otherwise, the firepower of the cooker is kept unchanged.

Fig. 3 is a schematic flow chart of another method for preventing dry burning of a cooker according to an embodiment of the present disclosure, and as shown in fig. 3, the method for preventing dry burning of a cooker includes:

and step S300, detecting the temperature information of the cookware and the firepower of the cooker.

And S310, determining the value of the corresponding dry burning prevention parameter according to the firepower of the stove. The dry heating prevention parameter at least comprises one or more of a boiling temperature interval, a dry heating temperature rise slope limit value and a dry heating temperature rise slope change limit value.

Step S320, determining whether the temperature information of the pot meets the boiling condition, if yes, going to step S340, otherwise, going to step S330. Here, the boiling condition includes that the temperature of the cooker is within the boiling temperature interval, and the temperature change value within the first set time is less than the third threshold value. Wherein, the boiling temperature interval and the third threshold are determined according to the firepower of the cooker.

Step S330, judging whether the boiling temperature exists; under the condition of the existing boiling temperature, setting the existing boiling temperature as the current boiling temperature, and returning to the step S300; otherwise, determining that the current cooking state is a waterless cooking state, and reducing the firepower of the cooker under the condition that the temperature of the cooker is greater than the dry-burning maximum threshold value.

Wherein, the maximum dry-burning threshold is determined according to the firepower of the cooker; the higher the firepower of the stove is, the higher the value of the maximum dry-burning threshold value is.

Step S340, under the condition of obtaining the boiling temperature for the first time, determining the current boiling temperature as the initial boiling temperature; otherwise, determining whether to update the initial boiling temperature according to the obtained value of the boiling temperature.

Step S350, acquiring the temperature change rate of the cooker, and reducing the firepower of the cooker under the condition that the temperature change rate of the cooker is greater than the dry-burning heating slope change limit value and the change rate of the temperature change rate is less than the dry-burning heating slope change limit value; otherwise, the firepower of the cooker is kept unchanged.

Here, the dry-fire ramp limit is used to describe a range of reasonable rates of change of the temperature of the cooker in the boiling state with water cooking. Under the cooking state with water, the temperature of the pot is maintained at a certain temperature, and the temperature change rate of the pot is stable; when dry burning occurs, the temperature of the cookware rises rapidly, the temperature change rate is increased rapidly and exceeds the numerical range expressed by the dry burning temperature rise slope limit value, at the moment, whether the temperature change condition of the cookware is accidental condition or continuous condition is judged according to the size relation between the change rate of the temperature change rate and the dry burning temperature rise slope change limit value, whether dry burning occurs in the cookware is judged, and under the condition that dry burning is possible, firepower is reduced until fire is turned off and gas is cut off, the cookware is controlled to send dry burning alarm information to an intelligent household appliance to prompt a user, or an audible and visual alarm is used for giving an alarm, so that the influence of the dry burning on the cookware is reduced.

Optionally, the dry-fire heating slope limit value and the change value of the dry-fire heating slope limit value are determined according to the firepower of the stove. Generally, under different heating conditions, the change ranges of the temperature rising slope limit values of dry heating are different, so that accurate dry heating prevention of the cookware in a boiling state according to the fire degree is realized, and the false judgment rate of the dry heating prevention is effectively reduced.

Optionally, when the temperature change rate of the pot is less than or equal to the dry-burning temperature-rising slope limit value, or the change rate of the temperature change rate is greater than or equal to the dry-burning temperature-rising slope change limit value, the method further includes:

executing corresponding dry-burning prevention operation according to the boiling temperature of the cookware; or

Executing corresponding dry-burning prevention operation according to the initial boiling temperature of the cookware; or

And setting an anti-dry heating threshold value according to the boiling temperature of the cooker.

Wherein, carry out the anti-dry combustion method operation that corresponds according to the boiling temperature of pan and include: determining a first difference value between the temperature of the cookware and the boiling temperature; under the condition that the first difference value is larger than or equal to the dry-burning temperature rise judgment value, reducing the firepower of the stove; and under the condition that the first difference value is smaller than the dry-burning temperature rise judgment value, keeping the firepower of the stove unchanged.

Therefore, by establishing the association between the cooking state of the cookware and factors such as the boiling temperature, the control strategy for preventing dry heating is determined according to the boiling temperature of the cookware and the real-time temperature of the cookware, the control strategy is not limited by factors such as the type of the cookware and the type of cooking food, the application range is wide, and the judgment on the dry heating prevention is more accurate and timely.

According to the initial boiling temperature of the pan, executing corresponding anti-dry heating operation, comprising: acquiring the current boiling temperature of the cookware; determining a first difference between the current boiling temperature and the initial boiling temperature; under the condition that the first difference value is larger than the boiling temperature rise threshold value, the firepower of the stove is reduced; and under the condition that the first difference value is less than or equal to the boiling temperature rise threshold value, keeping the firepower of the cooker unchanged.

Because the pan all has different boiling temperatures under the different circumstances of material or culinary art material, the change of eating the material state can lead to the boiling temperature of pan to change again in culinary art process, probably takes place the temperature of pan and the condition of boiling temperature synchronous variation. For example, in the stewing process of cooking congee and the like, the food materials gradually become thick, soft and rotten, the change trends of the boiling temperature and the temperature of the cooker are synchronous, the food materials and the cooker rise together when the dry-burning trend occurs, and the dry-burning prevention determination time cannot be determined according to the difference value between the temperature of the cooker and the boiling temperature. The scheme updates the numerical value of the initial boiling temperature in the cooking process to obtain the lowest temperature in the boiling state, so that the dry-heating opportunity can be judged according to the change of the difference value between the boiling temperature of the cooker and the initial boiling temperature, and the accuracy of dry-heating prevention judgment is improved. When dry burning occurs, the temperature of the cookware rises rapidly, the difference value between the current boiling temperature and the initial boiling temperature of the cookware is increased and exceeds the numerical range expressed by the boiling temperature rise threshold, at the moment, according to the technical scheme of the embodiment of the disclosure, the dry burning of the cookware is judged, firepower is reduced until fire is turned off and gas is cut off, and the cookware is controlled to send dry burning alarm information to an intelligent household appliance to prompt a user, or alarm is carried out through a sound-light alarm, so that the influence of the dry burning on the cookware is reduced.

The boiling temperature according to the pan sets up prevents dry combustion method temperature, includes: according to T_maxSetting dry-burning prevention temperature as a x T + k, and reducing the fire power of the cooker under the condition that the temperature of the cooker is greater than or equal to the dry-burning prevention temperature; under the condition that the temperature of the cooker is lower than the dry burning prevention temperature, the firepower of the cooker is kept unchanged.

Wherein T is_maxFor preventing dry-heating temperature of the kitchen range, T is the boiling of the potThe temperature, k is a correction parameter, and a is a weighted value greater than 0. The correction factor 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 cookware.

Under the state of cooking with water, the temperature of the pot is relatively stable, the pot is maintained to fluctuate within a certain temperature range, and frequent temperature change is avoided. When different cookers, different food materials and different firepowers are used for cooking, the boiling temperatures have larger difference, so that the dry-heating prevention temperature is set according to the boiling temperature of the cooker, the dry-heating prevention strategy of the cooker can be realized without selecting, the application range is wide, and the dry-heating prevention judgment is more accurate and timely.

Optionally, the above method for preventing dry-heating of a cooking stove further includes: and when the temperature of the cooker reaches the maximum set threshold value, controlling the cooker to stop heating. The maximum setting threshold is used for expressing the temperature of the dangerous dry burning of part or all of the cookers, and when the cookers reach the temperature, the cookware can be dried and even explode due to the continuous heating. Optionally, the maximum set threshold value is assigned to be 500 degrees, when the temperature of the cooker is higher than 500 degrees, the cooker is controlled to stop heating, and dry burning of the cooker can be prevented. Therefore, the dry burning prevention protection of the cookware is realized by setting the maximum set threshold value under the condition that the dry burning prevention strategy cannot be established according to the cooking state of the cookware.

Fig. 4 shows a device for preventing dry burning of a cooking range. As shown in fig. 4, the device for preventing the cookers from being dried includes a processor (processor)400 and a memory (memory) 401. Optionally, the apparatus 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 a bus 403. Communication interface 402 may be used for information transfer. The processor 400 may invoke logic instructions in the memory 401 to perform the method for cooktop dry-fire prevention of the embodiments described above.

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

The memory 401 is a computer-readable storage medium and can be used for storing software programs, computer-executable programs, such as program instructions/modules corresponding to the methods in the embodiments of the present disclosure. The processor 400 executes functional applications and data processing by running program instructions/modules stored in the memory 401, that is, implements the method for preventing dry burning of the cooking appliance in the above embodiments.

The memory 401 may include a storage program area and a storage data area, wherein the storage program area may store an operating system, an application program required for at least one function; the storage data area may store data created according to the use of the terminal device, and the like. Further, the memory 401 may include a high-speed random access memory, and may also include a nonvolatile memory.

The embodiment of the disclosure also provides a cooker which comprises the device for preventing dry burning of the cooker.

Optionally, the cooking utensils still include temperature-detecting device for obtain the temperature information of pan. Here, the Temperature monitoring device may be a Temperature sensor, a Negative Temperature Coefficient (NTC) thermistor, a Temperature probe, or the like that can detect Temperature. Generally, when the cooker is used for heating a pot, the temperature information of the pot may include a pot bottom temperature, a temperature rise rate thereof based on a temperature and time variation relationship, and a variation rate of the temperature rise rate. According to the temperature information of the cookware, the cooking state, the cooking stage and other information of the cookware can be acquired, and the dry burning prevention early warning can be performed. Optionally, the number of the temperature detection devices is one or more.

Optionally, this cooking utensils can be electromagnetism stove or gas-cooker, through setting up the device that is used for preventing dry combustion method, can be according to placing the temperature information of the pan of cooking on the cooking utensils, through establishing the culinary art state of pan and the relevance of factors such as temperature change rate, realize according to the temperature change rate of pan under the boiling state and confirm the control strategy who is used for preventing dry combustion method, do not receive the restriction of factors such as pan type, culinary art food kind, accommodation is wide, to preventing dry combustion method's judgement more accurate timely, effectively improved the safety in utilization of cooking utensils.

The embodiment of the disclosure provides a computer-readable storage medium, which stores computer-executable instructions configured to execute the above method for preventing dry burning of a cooker.

The disclosed embodiments provide a computer program product comprising a computer program stored on a computer readable storage medium, the computer program comprising program instructions which, when executed by a computer, cause the computer to perform the above-mentioned method for preventing dry-fire of a hob.

The computer-readable storage medium described above may be a transitory computer-readable storage medium or a non-transitory computer-readable storage medium.

The technical solution of the embodiments of the present disclosure may be embodied in the form of a software product, which is stored in a storage medium and includes one or more instructions for enabling a computer device (which may be a personal computer, a server, or a network device) to execute all or part of the steps of the method of the embodiments of the present disclosure. And the aforementioned storage medium may be a non-transitory storage medium comprising: a U-disk, a removable hard disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk or an optical disk, and other various media capable of storing program codes, and may also be a transient storage medium.

The above description and drawings sufficiently illustrate embodiments of the disclosure to enable those skilled in the art to practice them. Other embodiments may incorporate structural, logical, electrical, process, and other changes. The examples merely typify possible variations. Individual components and functions are optional unless explicitly required, and the sequence of operations may vary. Portions and features of some embodiments may be included in or substituted for those of others. Furthermore, the words used in the specification are words of description only and are not intended to limit the claims. As used in the description of the embodiments and the claims, the singular forms "a", "an" and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. Similarly, the term "and/or" as used in this application is meant to encompass any and all possible combinations of one or more of the associated listed. Furthermore, the terms "comprises" and/or "comprising," when used in this application, specify the presence of stated features, integers, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and/or groups thereof. Without further limitation, an element defined by the phrase "comprising an …" does not exclude the presence of other like elements in a process, method or apparatus that comprises the element. In this document, each embodiment may be described with emphasis on differences from other embodiments, and the same and similar parts between the respective embodiments may be referred to each other. For methods, products, etc. of the embodiment disclosures, reference may be made to the description of the method section for relevance if it corresponds to the method section of the embodiment disclosure.

Those of skill in the art would appreciate that the various illustrative elements and algorithm steps described in connection with the embodiments disclosed herein may be implemented as electronic hardware or combinations of computer software and electronic hardware. Whether such functionality is implemented as hardware or software may depend upon the particular application and design constraints imposed on the solution. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the disclosed embodiments. It can be clearly understood by the skilled person that, for convenience and brevity of description, the specific working processes of the system, the apparatus and the unit described above may refer to the corresponding processes in the foregoing method embodiments, and are not described herein again.

In the embodiments disclosed herein, the disclosed methods, products (including but not limited to devices, apparatuses, etc.) may be implemented in other ways. For example, the above-described apparatus embodiments are merely illustrative, and for example, the division of the units may be merely a logical division, and in actual implementation, there may be another division, for example, multiple units or components may be combined or integrated into another system, or some features may be omitted, or not executed. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection through some interfaces, devices or units, and may be in an electrical, mechanical or other form. The units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the units can be selected according to actual needs to implement the present embodiment. In addition, functional units in the embodiments of the present disclosure may be integrated into one processing unit, or each unit may exist alone physically, or two or more units are integrated into one unit.

The flowchart and block diagrams in the figures illustrate the architecture, functionality, and operation of possible implementations of systems, methods and computer program products according to embodiments of the present disclosure. In this regard, each block in the flowchart or block diagrams may represent a module, segment, or portion of code, which comprises one or more executable instructions for implementing the specified logical function(s). In some alternative implementations, the functions noted in the block may occur out of the order noted in the figures. For example, two blocks shown in succession may, in fact, be executed substantially concurrently, or the blocks may sometimes be executed in the reverse order, depending upon the functionality involved. In the description corresponding to the flowcharts and block diagrams in the figures, operations or steps corresponding to different blocks may also occur in different orders than disclosed in the description, and sometimes there is no specific order between the different operations or steps. For example, two sequential operations or steps may in fact be executed substantially concurrently, or they may sometimes be executed in the reverse order, depending upon the functionality involved. Each block of the block diagrams and/or flowchart illustrations, and combinations of blocks in the block diagrams and/or flowchart illustrations, can be implemented by special purpose hardware-based systems that perform the specified functions or acts, or combinations of special purpose hardware and computer instructions.

Claims

1. A method for preventing dry burning of a cooker is characterized by comprising the following steps:

detecting temperature information of the cookware;

under the condition that the temperature information of the cookware meets the boiling condition, acquiring the temperature change rate of the cookware within a set time;

and executing corresponding dry burning prevention operation according to the temperature change rate of the pot.

2. The method of claim 1, wherein the performing of the corresponding anti-dry heating operation according to the temperature change rate of the pot comprises:

3. The method of claim 2 wherein the rate of change of temperature of the pot comprises the rate of change of temperature of the pot over a plurality of detection periods.

4. A method according to claim 3, characterized in that the detection duration of part or all of the detection periods is different.

5. The method of claim 3, wherein the higher the fire of the cooktop, the lower the number of detection cycles.

6. The method of claim 2, wherein the first condition comprises:

7. The method of claim 6,

the first threshold value is determined according to the firepower of the cooker; and/or the presence of a gas in the gas,

8. The method of any one of claims 1 to 7, wherein the boiling conditions comprise:

9. Device for preventing dry-fire of a hob, comprising a processor and a memory in which program instructions are stored, characterized in that said processor is configured to carry out the method for preventing dry-fire of a hob according to any one of claims 1 to 8, when said program instructions are executed.

10. A hob, characterized in, that it comprises the device for dry burning prevention of a hob according to claim 9.