Control method and device for preventing dry burning of a stove, stove, computer readable storage medium

Abstract

The application relates to the technical field of intelligent household appliances, and discloses a control method for preventing dry burning of a stove, which comprises the following steps: acquiring a current boiling frequency, acquiring pot temperature information under the condition that the current boiling frequency is less than or equal to a boiling frequency threshold, acquiring a current stove firepower, determining a current waterless cooking condition corresponding to the current stove firepower, and continuously acquiring the current boiling frequency under the condition that the pot temperature information meets the current waterless cooking condition, wherein the current waterless cooking condition is determined according to the current stove firepower; and the safety cooking judgment condition corresponding to the waterless cooking state is determined according to the current stove firepower. When the waterless cooking state is determined and the safety cooking judgment condition is met, the accuracy of the dry burning prevention control is improved by continuously identifying the waterless cooking state. The application further discloses a control device for preventing dry burning of a stove, a stove and a computer storage medium.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of intelligent household appliances, for example to a control method and device for preventing dry burning of a stove, a stove and a computer readable storage medium. BACKGROUND

[0002] Dry burning refers to long-time heating of an empty pot, which leads to dry burning and burning of the pot due to long heating time, and is a common safety hazard in the kitchen. Dry burning of the pot can cause discoloration and deformation of the pot, and in severe cases, can even cause a fire. At present, a dry burning prevention function is commonly used in household stoves, which automatically turns off the stove when the pot reaches a set threshold, thereby achieving dry burning prevention control of the pot and protecting the pot. However, cooking is a complex process, and the type of pot, cooking mode, fire size and amount of food in the pot all affect dry burning judgment.

[0003] A control method for preventing dry burning is provided in the related art, which can determine whether the stove is in a water cooking state or a waterless cooking state according to the temperature of the pot and the temperature interval, and obtain a dry burning temperature value corresponding to the water cooking state or the waterless cooking state as a dry burning temperature threshold of the stove. Thus, the control precision of dry burning prevention is improved.

[0004] 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:

[0005] When the cooking state is determined only according to the temperature information of the pot to achieve dry burning prevention control, cooking state misjudgment is likely to occur, the actual cooking state does not match the judgment result, and the dry burning prevention effect is limited.

[0006] It should be noted that the information disclosed in the above background section is only used to strengthen the understanding of the background of the present application, and therefore can include information that does not constitute prior art known to those of ordinary skill in the art. SUMMARY

[0007] To have a basic understanding of some aspects of the disclosed embodiments, a brief summary is given below. The summary is not a general review, nor is it intended to determine key / important elements or delineate the scope of protection of these embodiments, but as a prelude to the detailed description below.

[0008] The embodiments of the present disclosure provide a control method and device for preventing dry burning of a stove, and a stove to improve the dry burning prevention control effect.

[0009] In some embodiments, the control method for preventing dry boiling of the stove includes: acquiring a current boiling frequency, acquiring pot temperature information if the current boiling frequency is less than or equal to a boiling frequency threshold; acquiring a current stove firepower, determining a current waterless cooking condition corresponding to the current stove firepower; if the pot temperature information meets the current waterless cooking condition, and if the pot temperature information meets a safety cooking judgment condition corresponding to the waterless cooking state, continuously acquiring the current boiling frequency; wherein the safety cooking judgment condition corresponding to the waterless cooking state is determined according to the current stove firepower.

[0010] Optionally, the acquiring of the current stove firepower and the determining of the current waterless cooking condition corresponding to the current stove firepower include: determining a corresponding waterless cooking judgment parameter according to the current stove firepower; and determining the current waterless cooking condition according to the waterless cooking judgment parameter.

[0011] Optionally, the waterless cooking judgment parameter includes a waterless cooking lower limit value, a waterless cooking upper limit value, and a waterless cooking temperature change range value; the current waterless cooking condition includes a current first waterless cooking condition: the current pot temperature is greater than or equal to the waterless cooking lower limit value and less than the waterless cooking upper limit value; and the difference between the current pot temperature and a plurality of pot temperatures before the current pot temperature is greater than the waterless cooking temperature change range value; wherein the difference between the plurality of pot temperatures includes at least the difference between two pot temperatures separated by a first set time length and the difference between two pot temperatures separated by a second set time length.

[0012] Optionally, the waterless cooking judgment parameter further includes a waterless dry boiling slope limit value; the current waterless cooking condition further includes a current second waterless cooking condition: the difference between the current pot temperature and a plurality of pot temperatures before the current pot temperature is greater than the waterless cooking temperature change range value; and the pot temperature change slope is less than the waterless dry boiling slope limit value; and the current pot temperature is less than or equal to a waterless dry boiling threshold value; if the pot temperature information meets the current first waterless cooking condition or the current second waterless cooking condition, the current cooking state is determined to be the waterless cooking state.

[0013] Optionally, the safety cooking judgment condition includes a first waterless cooking safety judgment condition, including: the current pot temperature is less than or equal to a maximum safety temperature threshold value, and / or the current pot temperature change rate is less than or equal to 0; the pot temperature information meeting the safety cooking judgment condition corresponding to the waterless cooking state includes the pot temperature information meeting the first waterless cooking safety judgment condition.

[0014] Optionally, the safety cooking judgment condition comprises a second waterless cooking safety judgment condition, including: the number of times that the slope of the change of the pot temperature is greater than the waterless dry boiling slope threshold is less than or equal to the waterless cooking dry boiling continuous judgment number; and / or, the second order derivative of the current pot temperature is less than the negative value of the waterless cooking dry boiling second order derivative limit value; the pot temperature information satisfying the safety cooking judgment condition corresponding to the waterless cooking state comprises: the pot temperature information satisfying the second waterless cooking safety judgment condition and satisfying the first waterless cooking safety judgment condition.

[0015] In some embodiments, the control device for preventing dry boiling of a stove comprises: a pot temperature acquisition module configured to acquire a current boiling number, and acquire pot temperature information when the current boiling number is less than or equal to a boiling number threshold; a stove fire determination module configured to acquire a current stove fire and determine a current waterless cooking condition corresponding to the current stove fire; and an execution module configured to, when the pot temperature information satisfies the current waterless cooking condition, continuously acquire the current boiling number if the pot temperature information satisfies a safety cooking judgment condition corresponding to a waterless cooking state.

[0016] In some embodiments, the control device for preventing dry boiling of a stove comprises a processor and a memory storing program instructions, and the processor is configured to execute the control method for preventing dry boiling of a stove as described above when running the program instructions.

[0017] In some embodiments, the stove comprises: a stove body; and a control device for preventing dry boiling of a stove as described above, which is installed on the stove body.

[0018] In some embodiments, the computer readable storage medium stores program instructions, and the program instructions are used to cause a computer to execute the control method for preventing dry boiling of a stove as described above when running.

[0019] The control method and device for preventing dry boiling of a stove, the stove, and the computer readable storage medium provided by the embodiments of the present disclosure can achieve the following technical effects:

[0020] By determining the corresponding waterless boiling condition according to the current stove fire, the cooking state is determined, and when the waterless cooking state is determined and the safety cooking judgment condition is satisfied, the current boiling number is continuously acquired to identify the water cooking state, so that the corresponding dry boiling prevention operation is performed. The accuracy of the cooking state determination under the current stove fire is improved, and the accuracy of the dry boiling prevention control is improved, and the misjudgment rate of the dry boiling prevention is effectively reduced. The dry boiling judgment result is more accurate and timely, and is not affected by the type of the pot.

[0021] The foregoing general description and the following detailed description are exemplary and explanatory only and are not intended to be limiting of the application. BRIEF DESCRIPTION OF DRAWINGS

[0022] One or more embodiments are illustrated by way of example in the figures that are not intended to be limiting of the application as defined by the claims and their equivalents. Identical reference numbers in the figures designate similar elements. The figures are not necessarily to scale, and the size of the elements in the figures can be exaggerated for illustrative purposes. In the figures:

[0023] Figure 1 is a use scenario schematic diagram of a stove provided by an embodiment of the present disclosure;

[0024] Figure 2 is a processor connection relationship schematic diagram of a stove provided by an embodiment of the present disclosure;

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

[0026] Figure 4a is a flow schematic diagram of another control method for preventing dry burning of a stove provided by an embodiment of the present disclosure;

[0027] Figure 4b is a flow schematic diagram of another control method for preventing dry burning of a stove provided by an embodiment of the present disclosure;

[0028] Figure 5a is a flow schematic diagram of another control method for preventing dry burning of a stove provided by an embodiment of the present disclosure;

[0029] Figure 5b is a flow schematic diagram of another control method for preventing dry burning of a stove provided by an embodiment of the present disclosure;

[0030] Figure 6 is a flow schematic diagram of another control method for preventing dry burning of a stove provided by an embodiment of the present disclosure;

[0031] Figure 7 is a schematic diagram of a control device for preventing dry burning of a stove provided by an embodiment of the present disclosure;

[0032] Figure 8 is a schematic diagram of another control device for preventing dry burning of a stove provided by an embodiment of the present disclosure;

[0033] Figure 9 is a schematic diagram of a stove provided by an embodiment of the present disclosure. DETAILED DESCRIPTION

[0034] In order to enable a more detailed understanding of the features and technical content of the embodiments of the present disclosure, the implementation of the embodiments of the present disclosure is described in detail below, and the accompanying drawings are used for reference only and do not limit the embodiments of the present disclosure. In the following technical description, in order to facilitate explanation, through multiple details, a sufficient understanding of the disclosed embodiments is provided. However, one or more embodiments can still be implemented without these details. In other cases, well-known structures and devices can be simplified to facilitate the drawings.

[0035] The terms "first", "second", and the like in the specification and claims of the embodiments of the present disclosure and the above drawings are used to distinguish similar objects, and do not necessarily have to describe a specific order or sequence. It should be understood that the data used in this way can be interchanged under appropriate circumstances, so as to implement the embodiments of the present disclosure described herein. In addition, the terms "include" and "have" and any variations thereof are intended to cover non-exclusive inclusion.

[0036] Unless otherwise specified, the term "multiple" means two or more.

[0037] In the embodiments of the present disclosure, the character " / " represents that the objects before and after are in an "or" relationship. For example, A / B represents: A or B.

[0038] The term "and / or" is a description of the association between objects, which means that there can be three relationships. For example, A and / or B, which means: A or B, or, A and B, three relationships.

[0039] The term "corresponding" can refer to an association or binding relationship. A and B correspond to each other, which means that there is an association or binding relationship between A and B.

[0040] In the embodiments of the present disclosure, the smart home appliance refers to the home appliance product formed after introducing microprocessors, sensor technology, network communication technology into home appliances, which has the characteristics of intelligent control, intelligent perception and intelligent application. The operation process of the smart home appliance often depends on the application and processing of modern technologies such as the Internet of Things, the Internet and electronic chips, for example, the smart home appliance can realize remote control and management of the smart home appliance by connecting electronic devices.

[0041] In the disclosed embodiments, the terminal device refers to an electronic device with wireless connectivity. The terminal device can communicate with the aforementioned smart home appliances via the internet, or directly via Bluetooth, Wi-Fi, or other methods. In some embodiments, the terminal device may be, for example, a mobile device, a computer, or an in-vehicle device built into a hovercraft, or any combination thereof. Mobile devices may include, for example, mobile phones, smart home devices, wearable devices, smart mobile devices, virtual reality devices, or any combination thereof. Wearable devices may include, for example, smartwatches, smart bracelets, pedometers, etc.

[0042] Stoves typically use temperature probes to detect the temperature of the pot's bottom and automatically shut off the gas supply when the temperature reaches a preset threshold, preventing fires and other accidents. However, cooking is a complex process; the type of cookware, cooking mode, heat level, and amount of food all affect the detection of dry burning. Existing methods are prone to problems such as delayed detection and misjudgment of dry burning. The various thresholds often only apply to one type of pot, resulting in a limited scope and delayed detection. For example, a thick-bottomed stone pot can reach a very high dry burning temperature, potentially exceeding 300°C. This could prevent the timely detection of dry burning in a pot. Conversely, some cast iron pots have a very low boiling point, and the temperature at which dry burning occurs is also very low (approximately 100°C to 150°C). For such pots, a fixed dry burning threshold may not be sufficient for timely detection. Therefore, conventional anti-dry burning strategies are limited by the type of cookware and have a narrow range of applicability. Furthermore, the temperature changes during dry burning vary depending on the heat level of the stove and the cooking conditions.

[0043] This solution addresses the issues of limited applicability and untimely judgment in stove anti-dry burning by establishing correlation and control logic among multiple factors, including cooking status and firepower identification, boiling temperature determination, temperature change range during dry burning, and boiling temperature change range.

[0044] Figure 1 This is a schematic diagram illustrating the usage scenario of the stove provided in this embodiment.

[0045] Combination Figure 1 As shown, this usage scenario includes a cooktop 100 and a home cloud platform 110 for communicating with the cooktop 100. The cooktop 100 can be a common cooktop used in kitchens, such as a gas cooktop, induction cooktop, electric ceramic cooktop, or integrated cooktop.

[0046] The cooktop 100 can connect to the home's WiFi network and communicate with control terminals such as mobile phones and cloud servers. Users can also control the cooktop 100 to execute cooking program commands through a smartphone application.

[0047] The stove 100 communicates with the home cloud platform 110 through a WiFi network, and the home cloud platform 110 is used to receive real-time state data of the stove 100 for a big data platform, an application program service subscription, and also issues cooking program instructions from other business servers, a big data platform, an application program end, and a smart terminal to the stove 100.

[0048] In other implementation scenarios of the scheme, a terminal device can also be included, which is used to communicate with the stove 100 and / or the home cloud platform 110. Here, the terminal device refers to a smart device in a smart home application scenario, such as a smart phone, a wearable device, a smart mobile device, a virtual display device, and the like, and can also be a smart home appliance device, such as a smart refrigerator, a smart television, a smart washing machine, a smart air conditioner, a smart sound box, a smart lamp, a smart curtain, and the like, or any combination thereof.

[0049] Figure 2 FIG. 1 is a schematic diagram of a processor connection relationship of a stove provided by an embodiment of the present disclosure.

[0050] In combination with Figure 2 , the processor 200 of the stove is used to receive and send information and instructions. The processor 200 of the stove is connected to a temperature sensor 210 and a stove fire controller 220.

[0051] The temperature sensor 210 is installed on the stove and is used to obtain the temperature of a heated area of a pot.

[0052] The stove fire controller 220 is used to obtain a current stove fire and adjust the stove fire according to an instruction. Here, when the stove is a gas stove, the current stove fire can be determined by obtaining a gas flow of a gas supply pipeline, or by a rotation angle of a knob of the stove, or by an opening degree of a gas flow adjusting proportional valve to determine a current heating gear. When the stove is an induction cooker or an electric ceramic cooker, the stove fire controller can determine the current stove fire by a current heating power.

[0053] Figure 3 FIG. 2 is a flowchart of a control method for preventing dry burning of a stove provided by an embodiment of the present disclosure, which is applied to the stove described above. The control method for preventing dry burning of the stove can be executed by a processor of the stove, or can be executed in a server, such as a home cloud platform in communication with the stove, or can be executed at a terminal device, such as a control terminal of a smart phone or a smart home appliance device. In the embodiment of the present disclosure, the processor of the stove is taken as an execution subject, and the scheme is described.

[0054] As shown in Figure 3 , the control method for preventing dry burning of the stove includes the following steps.

[0055] In step S301, the current boiling frequency is obtained, and in a case where the current boiling frequency is less than or equal to a boiling frequency threshold, the pot temperature information is obtained.

[0056] In step S302, the current stove fire is obtained, and the current waterless cooking condition corresponding to the current stove fire is determined.

[0057] In step S303, in a case where the pot temperature information meets the current waterless cooking condition, if the pot temperature information meets a safety cooking judgment condition corresponding to a waterless cooking state, the current boiling frequency is continuously obtained; wherein the safety cooking judgment condition corresponding to the waterless cooking state is determined according to the current stove fire.

[0058] Here, boiling refers to a state in which the temperature in the pot fluctuates within a small range above and below the boiling temperature in a case where the temperature in the pot reaches the boiling temperature in the safety cooking process of water cooking, and the stove fire does not change. The detection of the boiling state can be one of the reliable parameters for determining the current cooking state of the pot.

[0059] The boiling frequency threshold is used to determine the stability and effectiveness of the current boiling detection result.

[0060] Due to changes in food in the pot, or adjustment of the stove fire, etc., the pot may be boiled for a short time, but it does not reach the stable boiling state required for dry burning prevention determination. By comparing the current boiling frequency with the boiling frequency threshold, the stability of the current boiling state can be determined.

[0061] The pot temperature information includes the current pot temperature and the pot temperature change information within a set time period before the current time. Through the pot temperature information, the temperature change of the pot within the set time period before the current time can be determined.

[0062] The waterless cooking condition refers to a judgment condition for determining the state in the pot as waterless cooking under the current stove fire. Common waterless cooking includes cooking methods such as frying, stir-frying, and grilling.

[0063] The safety cooking judgment condition is used to indicate that the current state in the pot meets the cooking safety scenario. By establishing the corresponding relationship between the current stove fire and the safety cooking judgment condition, the accuracy of the current pot safety cooking determination can be improved.

[0064] Therefore, the embodiment of the present disclosure determines the corresponding waterless boiling condition by combining the current stove firepower, judges the cooking state, and when the waterless cooking state is determined and the safe cooking judgment condition is met, the water cooking state is identified by continuously obtaining the current boiling frequency, so that the corresponding dry burning prevention operation is performed. The accuracy of the cooking state judgment under the current stove firepower is improved, and the accuracy of the dry burning prevention control is improved, and the misjudgment rate of the dry burning prevention is effectively reduced. The dry burning judgment result is more accurate and timely, and is not affected by the type of pot.

[0065] Optionally, the current stove firepower is obtained, and the current waterless cooking condition corresponding to the current stove firepower is determined, including:

[0066] According to the current stove firepower, the corresponding waterless cooking judgment parameter is determined;

[0067] According to the waterless cooking judgment parameter, the current waterless cooking condition is determined.

[0068] Here, the waterless cooking judgment parameter refers to the pot temperature reference value related to the waterless cooking state.

[0069] By establishing the corresponding relationship between the current stove firepower and the waterless cooking judgment parameter, the accuracy of the waterless cooking state determination in the current pot can be improved.

[0070] Further, according to the current stove firepower, the corresponding waterless cooking judgment parameter is determined, including:

[0071] According to the stove firepower, one or more of the waterless cooking lower limit value, the waterless cooking upper limit value, the waterless cooking temperature change range value, and the waterless dry burning slope limit value are determined;

[0072] Among them, the waterless cooking lower limit value, the waterless cooking upper limit value, the waterless cooking temperature change range value, and the waterless dry burning slope limit value are positively correlated with the stove firepower.

[0073] Specifically, the waterless cooking temperature change range value is determined according to the firepower of the stove. Generally, under different heating conditions, the temperature change range value of the pot under the waterless cooking state is different, so that the accurate dry burning prevention of the pot under the waterless cooking state is realized according to the firepower degree, and the misjudgment rate of the dry burning prevention is effectively reduced.

[0074] The higher the stove firepower, the greater the waterless cooking temperature change range value. According to the linear relationship between the stove firepower and the waterless cooking temperature change range value, the waterless cooking temperature change range value is positively correlated with the stove firepower. The greater the stove firepower, the higher the heating degree, and the greater the temperature rising space of the pot under the waterless cooking state; the smaller the stove firepower, the lower the heating degree, and the more stable the temperature change range of the pot under the waterless cooking state.

[0075] For example, determining the corresponding waterless cooking temperature variation range value according to the current stove fire power comprises:

[0076] The stove fire power is obtained, and the waterless cooking temperature variation range value corresponding to the current stove fire power is obtained by searching the pre-stored corresponding relationship. The pre-set corresponding relationship includes a one-to-one positive correlation corresponding relationship between the stove fire power and the waterless cooking temperature variation range value. The corresponding relationship can be pre-stored in the controller of the stove, or the corresponding relationship can be pre-stored in other smart home appliances connected to the stove. In the process of communication between the smart home appliance and the stove, the corresponding relationship is called to determine the waterless cooking temperature variation range value according to the stove fire power.

[0077] The higher the stove fire power, the faster the temperature variation speed of the pot, and the higher the value of the waterless dry burning slope limit value.

[0078] The waterless dry burning slope limit value refers to the limit value of the temperature variation speed of waterless cooking in a safe cooking state. When the temperature variation speed of the pot is greater than the waterless dry burning slope limit value, it indicates that the temperature variation speed of the pot is too fast, and there is a risk of dry burning.

[0079] For example, determining the corresponding waterless dry burning slope limit value according to the current stove fire power comprises:

[0080] The stove fire power is obtained, and the waterless dry burning slope limit value corresponding to the current stove fire power is obtained by searching the pre-stored corresponding relationship. The pre-set corresponding relationship includes a one-to-one positive correlation corresponding relationship between the stove fire power and the waterless dry burning slope limit value. The corresponding relationship can be pre-stored in the controller of the stove, or the corresponding relationship can be pre-stored in other smart home appliances connected to the stove. In the process of communication between the smart home appliance and the stove, the corresponding relationship is called to determine the waterless dry burning slope limit value according to the stove fire power.

[0081] The following describes how to determine that the pot temperature information meets the current waterless cooking condition in combination with specific embodiments.

[0082] Figure 4a is a flowchart of a control method for preventing dry burning of a stove provided by the embodiments of the present disclosure, and is applied to the stove described above. In the embodiments of the present disclosure, the stove is taken as an execution subject, and the scheme is described.

[0083] As Figure 4a shown, the control method for preventing dry burning of the stove comprises:

[0084] In step S401a, the current boiling frequency is obtained, and in the case that the current boiling frequency is less than or equal to the boiling frequency threshold, the pot temperature information is obtained.

[0085] Step S402a: Determine the corresponding waterless cooking judgment parameters according to the current stove firepower; the waterless cooking judgment parameters include the lower limit value of waterless cooking, the upper limit value of waterless cooking, and the range of waterless cooking temperature change.

[0086] Step S403a: Determine the current first waterless cooking condition based on the waterless cooking judgment parameters.

[0087] The first anhydrous cooking condition includes:

[0088] The current cookware temperature is greater than or equal to the lower limit value S for waterless cooking. min And less than the upper limit value S for waterless cooking max Furthermore, the temperature difference ΔT between multiple cookware temperatures before the current cookware temperature is greater than the waterless cooking temperature variation range value U(T); wherein, the temperature difference ΔT between multiple cookware temperatures includes at least the temperature difference ΔT1 between two cookware temperatures spaced apart by a first set time interval and the temperature difference ΔT2 between two cookware temperatures spaced apart by a second set time interval.

[0089] Here, the lower limit value S for waterless cooking is... min This refers to the minimum permissible temperature value within the safe range for cookware under waterless cooking conditions; the upper limit value S for waterless cooking. max The maximum permissible temperature value used to describe the safe temperature range of cookware under waterless cooking conditions; the waterless cooking temperature variation range value U(T) is used to describe the reasonable fluctuation range of cookware temperature relative to the boiling temperature under boiling conditions with water.

[0090] Step S404a: If the pot temperature information meets the current first waterless cooking condition, and if the pot temperature information meets the safe cooking judgment condition corresponding to the waterless cooking state, then the current boiling count will continue to be obtained.

[0091] The maximum safe temperature threshold refers to the maximum safe cooking temperature. If the current temperature of the cookware exceeds the maximum safe temperature threshold, it indicates a high probability of the cookware drying out. In this case, turning off the gas supply to the stove is an anti-dry-burning measure to prevent the cookware temperature from rising further.

[0092] The current cookware temperature is greater than or equal to the lower limit value of waterless cooking S. min And less than the upper limit value S for waterless cooking max If multiple temperature differences ΔT1, ΔT2, etc., are all less than the waterless cooking temperature change range value U(T), the cookware temperature information is determined to meet the current first waterless cooking condition. Furthermore, when the waterless cooking state is determined and the safe cooking judgment condition is met, the current boiling count is continuously acquired to identify the water-cooked state, thereby executing the corresponding anti-dry-boil operation.

[0093] Figure 4bis a flowchart of a control method for preventing dry burning of a stove provided by an embodiment of the present disclosure, applied to the stove described above. In the embodiment of the present disclosure, the stove is taken as an execution subject, and the scheme is described.

[0094] As shown in Figure 4b , the control method for preventing dry burning of the stove comprises:

[0095] In step S401b, the current boiling frequency is obtained, and in the case that the current boiling frequency is less than or equal to the boiling frequency threshold, the pot temperature information is obtained.

[0096] In step S402b, the corresponding waterless cooking judgment parameters are determined according to the current stove firepower; the waterless cooking judgment parameters include a waterless cooking lower limit value, a waterless cooking upper limit value, a waterless cooking temperature change range value, and a waterless dry burning slope limit value.

[0097] In step S403b, the current first waterless cooking condition is determined according to the waterless cooking judgment parameters.

[0098] The first waterless cooking condition comprises:

[0099] The current pot temperature is greater than or equal to the waterless cooking lower limit value S min , and less than the waterless cooking upper limit value S max ; and the difference ΔT between the plurality of pot temperatures before the current pot temperature is greater than the waterless cooking temperature change range value U(T); wherein the difference ΔT between the plurality of pot temperatures at least includes the difference ΔT1 between two pot temperatures separated by a first set time length and the difference ΔT2 between two pot temperatures separated by a second set time length.

[0100] In step S404b, it is determined whether the pot temperature information meets the current first waterless cooking condition. In the case that the pot temperature information meets the current first waterless cooking condition, step S407b is entered, otherwise step S405b is entered.

[0101] In step S405b, in the case that the pot temperature information does not meet the current first waterless cooking condition, the current second waterless cooking condition is determined according to the waterless cooking judgment parameters. That is, in the case that the pot temperature information meets the current first waterless cooking condition or the current second waterless cooking condition, it is determined that the current cooking state is a waterless cooking state.

[0102] The current second waterless cooking condition comprises:

[0103] The difference ΔT between the plurality of pot temperatures before the current pot temperature is greater than the waterless cooking temperature change range value U(T); and the pot temperature change rate is less than the waterless dry burning slope limit value dT2; and the current pot temperature T is less than or equal to the waterless dry burning threshold Dsmax .

[0104] wherein the anhydrous cooking temperature variation range value U(T) can be determined according to the current pot temperature (or the current equivalent temperature) T, and is negatively related to the current pot temperature T.

[0105] In step S406b, it is determined whether the pot temperature information meets the current second anhydrous cooking condition. If the pot temperature information meets the current second anhydrous cooking condition, step S407b is entered, otherwise step S411b is entered.

[0106] In step S407b, it is determined that the current cooking state is an anhydrous cooking state.

[0107] In step S408b, a safety cooking judgment condition corresponding to the anhydrous cooking state is determined.

[0108] In step S409b, it is determined whether the pot temperature information meets the safety cooking judgment condition corresponding to the anhydrous cooking state. If the pot temperature information meets the safety cooking judgment condition corresponding to the anhydrous cooking state, step S401b is returned to continue to acquire the current boiling frequency, otherwise step S410b is entered.

[0109] In step S410b, the gas supply of the stove is turned off, and a dry boiling prompt information is sent to the user.

[0110] In step S411b, it is determined that the current cooking state is an unknown mode cooking state, and a corresponding dry boiling prevention operation is performed according to the unknown mode cooking state and the pot temperature information.

[0111] In this way, by setting the first anhydrous cooking judgment condition and the second anhydrous cooking judgment condition, multi-dimensional judgment of the anhydrous cooking state is realized, the accuracy of the cooking state detection is improved, and the accuracy of the current stove fire cooking safety judgment is improved.

[0112] Figure 5a is a flowchart of a control method for stove dry boiling prevention provided by the embodiments of the present disclosure, which is applied to the above-mentioned stove. In the embodiments of the present disclosure, the stove is taken as the execution subject, and the scheme is described.

[0113] As shown in Figure 5a , the control method for stove dry boiling prevention comprises the following steps:

[0114] In step S501a, the current boiling frequency is acquired, and the pot temperature information is acquired if the current boiling frequency is less than or equal to the boiling frequency threshold.

[0115] In step S502a, the current stove fire is acquired, and the current anhydrous cooking condition corresponding to the current stove fire is determined.

[0116] Step S503a, in the case where the pot temperature information meets the current waterless cooking condition, determining a first waterless cooking safety judgment condition according to the stove fire. The first waterless cooking safety judgment condition includes: the current pot temperature is less than or equal to the maximum safety temperature threshold, and / or the current pot temperature change rate is less than or equal to 0.

[0117] Step S504a, determine whether the pot temperature information meets the first waterless cooking safety judgment condition. In the case where the pot temperature information meets the first waterless cooking safety judgment condition, return to step S501a and continue to obtain the current boiling number.

[0118] Step S505a, in the case where the pot temperature information does not meet the first waterless cooking safety judgment condition, turn off the stove gas supply and send a dry burning prompt information to the user.

[0119] In this way, by setting the first waterless cooking safety judgment condition, the pot bottom temperature and the temperature change rate are used as the safety cooking judgment standard, which is not affected by factors such as pot type, cooking food amount, water amount, fire size, fire change, etc., has a wide range of adaptation, and is more accurate and timely.

[0120] Figure 5b is another flowchart of a control method for stove dry burning prevention provided by the embodiments of the present disclosure, applied to the above-mentioned stove. In the embodiments of the present disclosure, the stove is taken as the execution subject, and the scheme is described.

[0121] As shown in the figure, the control method for stove dry burning prevention includes: Figure 5b

[0122] Step S501b, obtain the current boiling number, and obtain the pot temperature information in the case where the current boiling number is less than or equal to the boiling number threshold.

[0123] Step S502b, obtain the current stove fire and determine the current waterless cooking condition corresponding to the current stove fire.

[0124] Step S503b, in the case where the pot temperature information meets the current waterless cooking condition, determining a second waterless cooking safety judgment condition according to the stove fire. The second waterless cooking safety judgment condition includes: the continuous number of times that the pot temperature change slope is greater than the waterless dry burning slope threshold is less than or equal to the waterless cooking dry burning continuous judgment number; and / or the second derivative of the current pot temperature is less than the negative value of the waterless cooking dry burning second derivative limit value.

[0125] ​Step S504b, determine whether the pot temperature information meets the second waterless cooking safety judgment condition. In the case of the pot temperature information meeting the second waterless cooking safety judgment condition, step S505b is entered, otherwise step S507b is entered.

[0126] Step S505b, according to the stove fire, determine the first waterless cooking safety judgment condition.

[0127] Step S506b, determine whether the pot temperature information meets the first waterless cooking safety judgment condition. In the case of the pot temperature information meeting the first waterless cooking safety judgment condition, return to step S501b, and continue to obtain the current boiling number, otherwise step S507b is entered.

[0128] Step S507b, turn off the stove gas supply, and send a dry burning prompt information to the user.

[0129] In this way, by setting the first waterless cooking safety judgment condition and the second waterless cooking safety judgment condition, using the pot bottom temperature, the temperature change rate and the second derivative of the pot temperature as the safety cooking judgment standard, the dry burning detection is more multi-dimensional, and the detection result is more accurate. And not affected by the type of pot, the amount of cooking food, the amount of water, the size of the fire, the change of the fire and other factors, the range is wide, the judgment is more accurate and timely.

[0130] Figure 6 is a flowchart of a control method for stove dry burning prevention provided by an embodiment of the disclosure, applied to the above-mentioned stove. In the embodiment of the disclosure, the stove is taken as the execution subject, and the scheme is described.

[0131] As shown in the figure, the control method for stove dry burning prevention comprises: Figure 6

[0132] Step S601, obtain the current stove fire.

[0133] Step S602, according to the stove fire, obtain the corresponding cooking judgment parameter from the preset database to form the cooking judgment condition.

[0134] Step S603, collect the pot temperature to meet the set number. After collecting the pot temperature to meet the set number, a new dry burning calculation and judgment is performed every time a new pot temperature is obtained.

[0135] Step S604, determine the pot temperature information according to the plurality of pot temperatures.

[0136] ​Here, the pot temperature information includes the current pot temperature; the temperature difference ΔT between multiple pot temperatures, at least including the temperature difference ΔT1 between two pot temperatures separated by a first set time length and the temperature difference ΔT2 between two pot temperatures separated by a second set time length; the change rate (first derivative) of the pot temperature within a third set time length; and the second derivative of the pot temperature within a fourth set time length.

[0137] The pot temperature can be calculated directly by the sensor, or the tail-removed average of multiple temperature values collected in a continuous period of time can be calculated as the current equivalent temperature T, and the temperature difference, the first derivative, the second derivative, etc. mentioned above can be calculated according to the equivalent temperature T.

[0138] In step S605, the current water cooking condition corresponding to the current stove firepower is determined. The water cooking condition at least includes the current boiling number B num > the water cooking boiling threshold N1. The current water cooking condition is composed of one or more cooking judgment parameters corresponding to the current stove firepower obtained in step S602.

[0139] In step S606, it is determined that the current state in the pot is boiling if the current pot temperature T is greater than or equal to the boiling lower limit value B min and less than the boiling upper limit value B max , and the multiple temperature differences ΔT1, ΔT2, … are all less than the boiling temperature range value ΔT biol . Otherwise, step S611 is entered.

[0140] In step S607, B num =B num +1, the current boiling temperature T biol =T. At the same time, the minimum current boiling temperature obtained after the firepower is changed is set as the initial boiling temperature T biol0 , and the maximum current boiling temperature obtained after the firepower is changed is set as the maximum boiling temperature T biolmax .

[0141] In step S608, it is determined whether B num =1 is true. If B num =1, step S609 is entered, otherwise step S610 is entered.

[0142] In step S609, T is set as the minimum boiling temperature T biol_min , and step S611 is entered.

[0143] In step S610, it is determined whether T biol <T biol_min is true. If T biol <T biol_min , step S609 is entered, otherwise S611 is entered.

[0144] Step S611, determine B num whether N1 is established. In the case of B num N1, go to step S611a. Otherwise, go to step S621 to make a judgment of the waterless cooking state.

[0145] Step S611a, determine whether the pot temperature information meets the current water cooking condition.

[0146] Step S612, in the case that the current cooking time is greater than the cooking set time, and the current pot temperature is greater than the dry burning temperature lower limit D min , input the water cooking state and the pot temperature information into the safety cooking model. Here, the current pot temperature and the cooking safety threshold corresponding to the current water cooking state need to be obtained, and in the embodiment of the present disclosure, the dry burning temperature lower limit D min is taken as the cooking safety threshold corresponding to the current water cooking state.

[0147] Step S613, determine the plurality of safety cooking judgment conditions corresponding to the water cooking state in the safety cooking model. In the embodiment, the safety judgment conditions corresponding to the water cooking state in the safety cooking model include safety cooking judgment conditions 1 to 5.

[0148] Step S614, determine whether the pot temperature information meets the safety cooking judgment condition 1. In the case that the pot temperature information meets the safety cooking judgment condition 1, go to step S615, otherwise go to step S620. In the plurality of safety cooking judgment conditions, whether the pot temperature information meets the corresponding water safety cooking judgment condition is determined one by one according to the set order.

[0149] The safety cooking judgment condition 1 includes:

[0150] the difference between the current pot temperature and the current boiling temperature is less than or equal to the first dry burning temperature judgment value T AFBT1 ; and / or, the second derivative d 2 T of the pot temperature within the fourth set time length is less than or equal to the water cooking dry burning second derivative limit value d 2 T1.

[0151] That is, the safety cooking judgment condition 1 includes: T-T biol ≤ T AFBT1 , and / or d 2 T ≤ d 2 T1.

[0152] Step S615, determine whether the pot temperature information meets the safety cooking judgment condition 2. In the case that the pot temperature information meets the safety cooking judgment condition 2, go to step S616, otherwise go to step S620.

[0153] Safe cooking judgment condition 2 includes:

[0154] The difference between the current pot temperature and the current boiling temperature is less than or equal to the second dry-boiling temperature rise judgment value T. AFBT2 ; and / or, the second derivative d of the cookware temperature within the fourth set time period. 2 T is greater than or equal to the second derivative limit d for water-cooked dry-boiling. 2 The negative value of T1.

[0155] That is, the second condition for judging safe cooking includes: TT biol ≤T AFBT2 , and / or d 2 T≤-d 2 T1.

[0156] Among them, T AFBT1 <T AFBT2 .

[0157] Step S616: Determine whether the cookware temperature information meets the safe cooking judgment condition 3. If the cookware temperature information meets the safe cooking judgment condition 3, proceed to step S617; otherwise, proceed to step S620.

[0158] Safe cooking judgment condition 3 includes: the number of consecutive times the rate of change of cookware temperature exceeds the limit value dT1 for dry burning in water is less than or equal to the number of consecutive judgments of dry burning in water n1, and / or, the second derivative of cookware temperature d within the fourth set time period. 2 T is greater than or equal to the second derivative limit d for water-cooked dry-boiling. 2 The negative value of T1.

[0159] Step S617: Determine whether the cookware temperature information meets the safe cooking judgment condition 4. If the cookware temperature information meets the safe cooking judgment condition 4, proceed to step S618; otherwise, proceed to step S620.

[0160] Safe cooking criteria 4 includes:

[0161] Current boiling temperature T biol With the initial boiling temperature T biol0 The difference is less than or equal to the maximum boiling temperature rise ΔDT bioll ; and / or, the second derivative d of the cookware temperature within the fourth set time period. 2 T is greater than or equal to the second derivative limit d for water-cooked dry-boiling. 2 The negative value of T1.

[0162] That is, the third condition for judging safe cooking includes: T biol -T biol0 ≤ΔT biol , and / or d2 T ≥ -d 2 T1.

[0163] Step S618, determine whether the pot temperature information meets the safety cooking judgment condition 5. In the case of the pot temperature information meeting the safety cooking judgment condition 5, enter step S619, otherwise enter step S620.

[0164] The safety cooking judgment condition 5 includes:

[0165] The current pot temperature T is less than or equal to the maximum safety temperature threshold D max , and / or, the current pot temperature change rate is less than or equal to 0.

[0166] Step S619, output the safety cooking judgment result as safe, and return to step S601.

[0167] Step S620, output the safety cooking judgment result as dry burning, and turn off the gas supply of the stove, and prompt the user to dry burning. At this time, the gas supply of the stove can be controlled to be turned off and the buzzer alarm can be controlled.

[0168] Step S621, determine the current waterless cooking condition corresponding to the current stove firepower. The current waterless cooking condition at least includes the current first waterless cooking condition.

[0169] Step S622, determine whether the pot temperature information meets the first waterless cooking condition. In the case of the pot temperature information meeting the current first waterless cooking condition, enter step S624, otherwise enter step S623.

[0170] The current first waterless cooking condition includes:

[0171] The current pot temperature is greater than or equal to the lower limit of waterless cooking S min , and less than the upper limit of waterless cooking S max ; and, the difference ΔT between the plurality of pot temperatures before the current pot temperature is greater than the waterless cooking temperature change range value U(T); wherein the difference ΔT between the plurality of pot temperatures at least includes the difference ΔT1 between the two pot temperatures separated by a first set time length and the difference ΔT2 between the two pot temperatures separated by a second set time length.

[0172] Step S623, determine whether the pot temperature information meets the second waterless cooking condition. In the case of the pot temperature information meeting the current second waterless cooking condition, determine that the current state in the pot is a waterless cooking state. Enter step S624, otherwise enter step S626. That is, in the case of the pot temperature information meeting the current first waterless cooking condition or the current second waterless cooking condition, it is determined that the current cooking state is a waterless cooking state.

[0173] The current second waterless cooking condition includes:

[0174] The difference AT between the plurality of pot temperatures before the current pot temperature is greater than the waterless cooking temperature variation range value U(T); and the pot temperature variation rate is less than the waterless cooking dry burning slope limit value dT2; and the current pot temperature T is less than or equal to the waterless cooking dry burning threshold value D smax .

[0175] Wherein, the waterless cooking temperature variation range value U(T) can be determined according to the current pot temperature (or the current equivalent temperature) T, which is negatively related to the current pot temperature T.

[0176] Step S624, the pot temperature information satisfies the current waterless cooking condition. It is determined that the current state in the pot is the waterless cooking state.

[0177] Step S625, in the case that the current cooking time is greater than the cooking set time, and the current pot temperature is greater than the waterless cooking dry burning threshold value D smax , the waterless cooking state and the pot temperature information are input into the safety cooking model. Here, the current pot temperature and the cooking safety threshold value corresponding to the current waterless cooking state need to be obtained. In the embodiment of the present disclosure, the waterless cooking dry burning threshold value D smax is taken as the cooking safety threshold value corresponding to the current waterless cooking state.

[0178] Step S626, one or more safety cooking judgment conditions corresponding to the waterless cooking state in the safety cooking model are determined. In the embodiment, the safety judgment conditions corresponding to the waterless cooking state in the safety cooking model include safety cooking judgment conditions 5 and 6.

[0179] Step S627, it is determined whether the pot temperature information satisfies the safety cooking judgment condition 6. In the case that the pot temperature information satisfies the safety cooking judgment condition 6, step S618 is entered, otherwise step S620 is entered. In step S618, the numerical comparison between the previous pot temperature T and the maximum safety temperature threshold value D max is performed again, so as to realize the continuous acquisition of the current boiling times, until the current pot temperature is greater than the maximum safety temperature threshold value, and then the gas supply of the stove is turned off. In this way, after judging the waterless cooking, the water cooking mode recognition is continued, which can adapt to the scene of adding water and materials during cooking.

[0180] Wherein, the safety cooking judgment condition 6 includes:

[0181] The continuous number of times that the pot temperature variation slope is greater than the waterless dry burning slope threshold value is less than or equal to the waterless cooking dry burning continuous judgment number n2; and / or, the second derivative of the current pot temperature is less than the negative value of the waterless cooking dry burning second derivative limit value d 2 T2.

[0182] Step S628, input the unknown mode cooking state and the pot temperature information into the safe cooking model. The unknown mode cooking state includes the case that the cooking state cannot be determined according to the current pot temperature information, and also includes the case that the pot cooking state is determined as the unknown mode cooking state when the stove is powered on or the fire power changes.

[0183] Step S629, determine one or more safe cooking judgment conditions in the safe cooking model corresponding to the unknown mode cooking state. In the embodiment, the safe judgment condition corresponding to the unknown mode cooking state in the safe cooking model includes the safe cooking judgment condition 5, that is, enter step S618.

[0184] Optionally, the cooking judgment parameters used in the above embodiments are all obtained from the preset database according to the current stove fire power.

[0185] Further, the corresponding cooking judgment parameter is determined according to the current stove fire power, including:

[0186] The stove fire power is obtained, and the cooking judgment parameter corresponding to the current stove fire power is obtained by looking up the pre-stored association relationship. The pre-set corresponding relationship includes the one-to-one corresponding relationship between the stove fire power and one or more cooking judgment parameters. The association relationship can be pre-stored in the controller of the stove, or the association relationship can be pre-stored in other smart home appliances connected with the stove. In the process of communication between the smart home appliance and the stove, the association relationship is called to determine the cooking judgment parameter according to the stove fire power.

[0187] For example, the corresponding cooking judgment parameter is determined according to the current stove fire power, including:

[0188] Obtain the initial cooking judgment parameter;

[0189] Adjust the initial cooking judgment parameter according to the association relationship between the current stove fire power and the cooking judgment parameter.

[0190] The one-to-one corresponding relationship between the stove fire power and one or more cooking judgment parameters can be pre-stored in the database in the form of a table. Table 2 shows an example of the above association relationship.

[0191] Table 2

[0192]

[0193]

[0194] Therefore, by using the control method for preventing dry burning of a stove provided in the embodiments of the present disclosure, the corresponding cooking judgment parameter can be determined in combination with the current stove firepower, and the cooking safety judgment accuracy under the current stove firepower can be improved. Meanwhile, instead of directly using the pot bottom temperature, the multiple temperature values collected or the tail-removed average value in the set time is used as an equivalent temperature for calculation, which can avoid misjudgment caused by accidental and short-term temperature abnormalities and improve the reliability of the detection data. The boiling and waterless cooking states are determined according to the pot temperature changes in different time lengths, the boiling temperature and the boiling frequency are used to judge whether it is a water cooking mode, and the temperature changes in different time lengths are considered, so that the cooking state judgment is more accurate. The boiling and waterless cooking states are determined according to the pot temperature changes in different time lengths, and the temperature changes in different time lengths are considered, so that the cooking state judgment is more accurate. The safety cooking model with built-in safety cooking judgment conditions, and the judgment conditions do not exclude each other. In the water cooking mode, the boiling temperature and the first and second derivatives of the temperature change are used as the safety cooking judgment standard, and in the waterless cooking mode, the pot bottom temperature and the first and second derivatives of the temperature change are used as the safety cooking judgment standard. It is not affected by factors such as the type of pot, the amount of food cooked, the amount of water, the size of the fire, the change of the fire, and has a wide range of adaptation and more accurate and timely judgment.

[0195] Figure 7 FIG. 1 is a schematic diagram of a control device for preventing dry burning of a stove provided in an embodiment of the present disclosure. The control device for preventing dry burning of the stove can be realized in the form of software, hardware or combination of both.

[0196] In combination with Figure 7 As shown in FIG. 7, the embodiments of the present disclosure provide a control device 700 for preventing dry burning of a stove, which includes a stove firepower determination module 71, a pot temperature acquisition module 72 and an execution module 73. The stove firepower determination module 71 is configured to obtain the current stove firepower and determine the current waterless cooking condition corresponding to the current stove firepower. The pot temperature acquisition module 72 is configured to obtain the current boiling frequency and obtain the pot temperature information if the current boiling frequency is less than or equal to the boiling frequency threshold. The execution module 73 is configured to, if the pot temperature information meets the current waterless cooking condition, continuously obtain the current boiling frequency if the pot temperature information meets the safety cooking judgment condition corresponding to the waterless cooking state, wherein the safety cooking judgment condition corresponding to the waterless cooking state is determined according to the current stove firepower.

[0197] In combination with Figure 8As shown, the embodiment of the present disclosure provides a control device 800 for preventing dry burning of a stove, comprising a processor 800 and a memory 801. Optionally, the device can also comprise a communication interface 802 and a bus 803. Wherein the processor 800, the communication interface 802, and the memory 801 can complete mutual communication through the bus 803. The communication interface 802 can be used for information transmission. The processor 800 can call the logical instructions in the memory 801 to execute the control method for preventing dry burning of the stove in the above-mentioned embodiment.

[0198] In addition, the logical instructions in the memory 801 described above can be realized in the form of a software function unit and sold or used as an independent product, which can be stored in a computer readable storage medium.

[0199] The memory 801 as a computer readable storage medium can be used to store software programs, computer executable programs, such as program instructions / modules corresponding to the method in the embodiment of the present disclosure. The processor 800 executes the program instructions / modules stored in the memory 801, thereby executing function applications and data processing, that is, realizing the control method for preventing dry burning of the stove in the above-mentioned embodiment.

[0200] The memory 801 can include a program storage area and a data storage area, wherein the program storage area can store an operating system and application programs required by at least one function; the data storage area can store data created according to the use of the terminal device, etc. In addition, the memory 801 can include a high-speed random access memory, and can also include a non-volatile memory.

[0201] In combination Figure 9 As shown, the embodiment of the present disclosure provides a stove 100, comprising a product body and the control device 700 (800) for preventing dry burning of the stove described above. The control device 700 (800) for preventing dry burning of the stove is installed on the product body. The installation relationship described herein is not limited to placing in the product, but also includes installation connection with other components of the product, including but not limited to physical connection, electrical connection or signal transmission connection, etc. Those skilled in the art can understand that the control device 700 (800) for preventing dry burning of the stove can be adapted to a feasible product body, and thus realize other feasible embodiments.

[0202] The embodiment of the present disclosure provides a computer readable storage medium, which stores computer executable instructions, and the computer executable instructions are set to execute the control method for preventing dry burning of the stove.

[0203] The technical solutions of the embodiments of the present disclosure can be embodied in the form of a software product. The computer software product is stored in a storage medium and includes one or more instructions for causing a computer device (which can be a personal computer, a server, or a network device, etc.) to execute all or part of the steps of the method disclosed in the embodiments of the present disclosure. The aforementioned storage medium can be a non-transitory storage medium, such as a U disk, a mobile hard disk, a read-only memory (ROM), a random access memory (RAM), a magnetic disk or an optical disk, and various media that can store program codes.

[0204] The above description and drawings sufficiently illustrate the embodiments of the present disclosure to enable one skilled in the art to practice them. Other embodiments can include structural, logical, electrical, process, and other changes. The embodiments represent only a few of the possible variations. Individual components and functions are optional unless explicitly required, and the order of operations can be changed. Parts and features of some embodiments can be included or replaced by parts and features of other embodiments. Also, the words used in this application are used only to describe the embodiments and not to limit the claims. As used in the description of the embodiments and the claims, unless the context clearly indicates otherwise, the singular forms "a," "an," and "the" are intended to include the plural forms as well. Similarly, the term "and / or" as used in this application refers to any and all possible combinations of one or more associated listed items. In addition, when used in this application, the term "comprise" and its variants "comprises" and / or "comprising" and the like mean the presence of the stated features, integers, steps, operations, elements, and / or components, but do not exclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and / or groups thereof. Without more limitations, the element defined by the phrase "comprising a" does not exclude the presence of additional identical elements in the process, method, or device that includes the stated element. In this document, each embodiment focuses on the differences from other embodiments, and the same or similar parts between embodiments can be referred to each other. For the method, product, etc. disclosed in the embodiments, if it corresponds to the method part disclosed in the embodiments, the relevant part can be referred to the description of the method part.

[0205] Those skilled in the art can understand that the units and algorithm steps of each example described in combination with the embodiments disclosed herein can be realized by electronic hardware or a combination of computer software and electronic hardware. Whether the functions are realized in hardware or software depends on the specific application and design constraints of the technical solution. The skilled person can use different methods for each specific application to realize the described functions, but such implementation should not be considered beyond the scope of the embodiments of the present disclosure. The skilled person can clearly understand that, for the convenience and brevity of description, the specific working processes of the above-described system, device and unit can refer to the corresponding processes in the foregoing method embodiments, which will not be repeated here.

[0206] In the embodiments disclosed herein, the disclosed methods, products (including but not limited to devices, equipment, etc.) can be implemented in other ways. For example, the above-described device embodiments are only schematic, for example, the division of the units can only be a logical function division, and actual implementation can have another division manner, for example, a plurality of 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 the units shown or discussed can be indirect coupling or communication connection through some interface, device or unit, and can be electrical, mechanical or other forms. The units described as separate components can or can not be physically separate, and the components shown as units can or can not be physical units, that is, they can be located in one place, or can be distributed on a plurality of network units. Part or all of the units can be selected according to actual needs to implement the embodiments. In addition, each functional unit in the embodiments of the present disclosure can be integrated in one processing unit, or each unit can be a physically independent unit, or two or more units can be integrated in one unit.

[0207] The computer program instructions can also be loaded onto a computer, other programmable data processing apparatus, or other processing device to cause a series of operational steps to be performed on the computer, other programmable apparatus or other processing device to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide processes for implementing the functions / acts specified in the flowchart and / or block diagram block or blocks.

Claims

1. A control method for preventing dry boiling of a cooking appliance, characterized in that, The method comprises the following steps: acquiring a current boiling number, and acquiring pot temperature information in a case where the current boiling number is less than or equal to a boiling number threshold; acquiring a current stove fire, and determining a current waterless cooking condition corresponding to the current stove fire; in a case where the pot temperature information meets the current waterless cooking condition, if the pot temperature information meets a safety cooking judgment condition corresponding to a waterless cooking state, continuously acquiring the current boiling number; wherein the safety cooking judgment condition corresponding to the waterless cooking state is determined according to the current stove fire; the safety cooking judgment condition comprises a first waterless cooking safety judgment condition, which comprises that the current pot temperature is less than or equal to a maximum safety temperature threshold, and / or the current pot temperature change rate is less than or equal to 0; the pot temperature information meeting the safety cooking judgment condition corresponding to the waterless cooking state comprises: the pot temperature information meeting the first waterless cooking safety judgment condition; the safety cooking judgment condition further comprises a second waterless cooking safety judgment condition, which comprises: a continuous number of times that a pot temperature change slope is greater than a waterless dry burning slope threshold is less than or equal to a waterless cooking dry burning continuous judgment number; and / or a second derivative of the current pot temperature is less than a negative value of a waterless cooking dry burning second derivative limit value; the pot temperature information meeting the safety cooking judgment condition corresponding to the waterless cooking state comprises: the pot temperature information meeting the second waterless cooking safety judgment condition and the first waterless cooking safety judgment condition.

2. The control method according to claim 1, characterized by, the acquiring of the current stove fire and the determining of the current waterless cooking condition corresponding to the current stove fire comprise: determining corresponding waterless cooking judgment parameters according to the current stove fire, respectively; determining the current waterless cooking condition according to the waterless cooking judgment parameters.

3. The control method according to claim 2, characterized by, the waterless cooking judgment parameters comprise a waterless cooking lower limit value, a waterless cooking upper limit value, and a waterless cooking temperature change range value; the current waterless cooking condition comprises a current first waterless cooking condition: the current pot temperature is greater than or equal to the waterless cooking lower limit value and less than the waterless cooking upper limit value; and a difference between a plurality of pot temperatures before the current pot temperature is greater than the waterless cooking temperature change range value; wherein the difference between the plurality of pot temperatures at least comprises a difference between two pot temperatures spaced by a first set time length and a difference between two pot temperatures spaced by a second set time length.

4. The control method according to claim 3, characterized by the waterless cooking judgment parameters further comprise a waterless dry burning slope limit value; and the current waterless cooking condition further comprises a current second waterless cooking condition: the difference between the plurality of pot temperatures before the current pot temperature is greater than the waterless cooking temperature change range value; and the pot temperature change slope is less than the waterless dry burning slope limit value; and the current pot temperature is less than or equal to a waterless cooking dry burning threshold; in a case where the pot temperature information meets the current first waterless cooking condition or the current second waterless cooking condition, determining that a current cooking state is a waterless cooking state.

5. A control device for preventing dry boiling of a cooking appliance, characterized in that, The method comprises the following steps: a pot temperature acquisition module configured to acquire a current boiling number, and acquire pot temperature information in a case where the current boiling number is less than or equal to a boiling number threshold; The stove fire determination module is configured to obtain a current stove fire, and determine a current waterless cooking condition corresponding to the current stove fire; The execution module is configured to, in a case where the pot temperature information meets the current waterless cooking condition, if the pot temperature information meets a safety cooking judgment condition corresponding to the waterless cooking state, continue to obtain the current boiling number; The safety cooking judgment condition corresponding to the waterless cooking state is determined according to the current stove fire; The safety cooking judgment condition includes a first waterless cooking safety judgment condition, including: the current pot temperature is less than or equal to a maximum safety temperature threshold, and / or, a current pot temperature change rate is less than or equal to 0; The pot temperature information meeting the safety cooking judgment condition corresponding to the waterless cooking state includes: The pot temperature information meeting the first waterless cooking safety judgment condition; The safety cooking judgment condition further includes a second waterless cooking safety judgment condition, including: A continuous number of times that a pot temperature change slope is greater than a waterless dry burning slope threshold is less than or equal to a waterless cooking dry burning continuous judgment number; and / or, a second order derivative of the current pot temperature is less than a negative value of a waterless cooking dry burning second order derivative limit value; The pot temperature information meeting the safety cooking judgment condition corresponding to the waterless cooking state includes: The pot temperature information meeting the second waterless cooking safety judgment condition and the first waterless cooking safety judgment condition.

6. A control device for preventing dry boiling of a cooking appliance, comprising a processor and a memory having stored program instructions, characterized in that, The processor is configured to, when running the program instructions, execute the control method for stove dry burning prevention according to any one of claims 1 to 4.

7. A hob, characterized in that Including: A stove body; The control device for stove dry burning prevention according to claim 5 or 6 is installed on the stove body.

8. A computer-readable storage medium storing program instructions, characterized in that, The program instructions, when running, are used to make the computer execute the control method for stove dry burning prevention according to any one of claims 1 to 4.

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