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: detecting a current stove firepower, determining a current water cooking condition corresponding to the current stove firepower; collecting pot temperature information under the current stove firepower; and in the case that the pot temperature information meets the current water cooking condition, performing a corresponding dry burning prevention operation according to a water cooking state and the pot temperature information. The corresponding water cooking condition is determined by combining the current stove firepower, the cooking state is judged, and the dry burning prevention operation corresponding to the pot temperature information and the cooking state is performed. The cooking state under the current stove firepower is accurately judged, the accuracy of the dry burning prevention control is improved, and the misjudgment rate of the dry burning prevention is effectively reduced. 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 based on only the temperature information of the pot to achieve dry burning prevention control, it is easy to cause misjudgment of the cooking state when the pot is actually not boiling, or the actual cooking state does not match the judgment result, and the effect of dry burning prevention 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 effect of dry burning prevention control.

[0009] In some embodiments, the control method for preventing dry burning of the stove includes: detecting a current stove fire, determining a current water cooking condition corresponding to the current stove fire; collecting pot temperature information under the current stove fire; in the case that the pot temperature information meets the current water cooking condition, performing a corresponding dry burning prevention operation according to the water cooking state and the pot temperature information.

[0010] Optionally, the detection of the current stove fire and the determination of the current water cooking condition corresponding to the current stove fire include: determining a corresponding water cooking judgment parameter according to the current stove fire; and determining the current water cooking condition according to the water cooking judgment parameter.

[0011] Optionally, the water cooking judgment parameter includes a boiling frequency threshold; and the pot temperature information meeting the current water cooking condition includes: in the case that the pot temperature information indicates that the current pot state is a boiling state, the current boiling frequency increases by 1; and the pot temperature is continuously collected until the current boiling frequency is greater than the boiling frequency threshold, and it is determined that the pot temperature information meets the current water cooking condition.

[0012] Optionally, the water cooking judgment parameter further includes a boiling upper limit value, a boiling lower limit value, and a boiling temperature range value corresponding to the current stove fire; and the case that the pot temperature information indicates that the current pot state is a boiling state includes: the current pot temperature is greater than or equal to the boiling lower limit value and less than the boiling upper limit value; and the difference between the current pot temperature and a plurality of pot temperatures is less than the boiling temperature 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.

[0013] Optionally, the determination of the corresponding water cooking judgment parameter according to the current stove fire includes: determining one or more of the boiling frequency threshold, the boiling upper limit value, the boiling lower limit value, and the boiling temperature range value according to the stove fire; wherein the boiling frequency threshold is negatively correlated with the stove fire; and the boiling upper limit value, the boiling lower limit value, and the boiling temperature range are positively correlated with the stove fire.

[0014] Optionally, the execution of the corresponding dry burning prevention operation according to the water cooking state and the pot temperature information includes: obtaining a safe cooking model corresponding to the current stove fire; inputting the water cooking state and the pot temperature information into the safe cooking model to output a safe cooking judgment result; and performing a dry burning prevention operation corresponding to the safe cooking judgment result.

[0015] In some embodiments, the control device for preventing dry burning of the stove comprises: a stove fire determination module configured to detect a current stove fire and determine a current water cooking condition corresponding to the current stove fire; a pot temperature acquisition module configured to acquire pot temperature information under the current stove fire; and an execution module configured to, in a case where the pot temperature information satisfies the current water cooking condition, execute a corresponding dry burning prevention operation according to a water cooking state and the pot temperature information.

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

[0019] The control method and device for preventing dry burning of the 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 water cooking condition in combination with the current stove fire, the cooking state is judged, and the dry burning prevention operation corresponding to the pot temperature information and the cooking state is executed. The accuracy of the cooking state under the current stove fire 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.

[0021] The general description above and the following description below are exemplary and explanatory only and are not intended to be limiting of the present disclosure. 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 present disclosure. Identical reference numbers in different figures identify identical, or at least functionally similar elements. Figures are not drawn to scale unless otherwise indicated. And:

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

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

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

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

[0027] Figure 5 is a flowchart of another control method for preventing dry burning of a gas stove provided by an embodiment of the present disclosure;

[0028] Figure 6 is a flowchart of another control method for preventing dry burning of a gas stove provided by an embodiment of the present disclosure;

[0029] Figure 7 is a schematic diagram of a control device for preventing dry burning of a gas stove provided by an embodiment of the present disclosure;

[0030] Figure 8 is a schematic diagram of another control device for preventing dry burning of a gas stove provided by an embodiment of the present disclosure;

[0031] Figure 9 is a schematic diagram of a gas stove provided by an embodiment of the present disclosure. DETAILED DESCRIPTION

[0032] In order to enable a person skilled in the art to more fully understand the features and technical contents of the embodiments of the present disclosure, the implementation of the embodiments of the present disclosure will be described in detail below with reference to the accompanying drawings, which are used only for reference and are not intended to limit the embodiments of the present disclosure. In the following technical description, in order to facilitate explanation, a plurality of details are provided to provide a full understanding of the disclosed embodiments. 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.

[0033] The terms "first", "second", and the like in the specification and claims of the embodiments of the present disclosure and the above-described 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 thus used can be interchanged under appropriate circumstances, so that the embodiments of the present disclosure described herein can be implemented. In addition, the terms "include" and "have" and any variations thereof are intended to cover non-exclusive inclusion.

[0034] Unless otherwise specified, the term "a plurality of" means two or more.

[0035] In the embodiments of the present disclosure, the character " / " represents an "or" relationship between the objects before and after it. For example, A / B means A or B.

[0036] The term "and / or" is a description of an association relationship between objects, which means that there can be three relationships. For example, A and / or B means that there are three relationships of A or B, or A and B.

[0037] The term "corresponding" can refer to an association relationship or a binding relationship. A corresponds to B means that there is an association relationship or a binding relationship between A and B.

[0038] The dry burning prevention technology of the stove generally detects the temperature of the pot bottom through a temperature probe, and actively closes the gas passage when the temperature reaches a pre-set threshold value to prevent accidents such as fire. But cooking is a complex process, the type of pot, the cooking mode, the size of the fire, and the amount of food in the pot will all affect the dry burning judgment, and the existing method is prone to problems such as delayed judgment and dry burning misjudgment. The various thresholds set often only apply to one type of pot, with a small range of application and delayed judgment. For example, a thick-bottomed stone pot has a very high dry burning temperature, which may exceed 300℃. It may also cause the pot that has already been dry burning to be judged as dry burning. For example, some cast iron pots have a very low boiling temperature, and the temperature when dry burning occurs is also very low (about 100℃ to 150℃). For this pot, a fixed dry burning threshold cannot timely judge dry burning. It can be seen that the conventional dry burning prevention strategy is limited by the type of pot, and the range of applicable pot types is small. On the other hand, under different stove fires, the temperature change of the pot under different cooking conditions when dry burning occurs is different.

[0039] The present scheme establishes an association and control logic for multiple factors such as cooking state and fire identification, boiling temperature determination, dry burning stage temperature change amplitude, and boiling temperature change amplitude, to solve the problem of small application range and delayed judgment of the stove dry burning prevention.

[0040] Figure 1 is a use scenario diagram of the stove provided by the embodiments of the present disclosure.

[0041] In combination with Figure 1 As shown in the figure, the use scenario includes a stove 100 and a home cloud platform 110 for communication with the stove 100. Among them, the stove 100 can be a common stove in the kitchen scene such as a gas stove, an electromagnetic stove, an electric ceramic stove, and an integrated stove.

[0042] The stove 100 can access the home WiFi network and communicate with the control terminal such as a mobile phone and a cloud server. The user can also control the stove 100 to execute the cooking program instruction through the smart phone application.

[0043] 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.

[0044] 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.

[0045] Figure 2 FIG. 1 is a schematic diagram of a processor connection relationship of a stove provided by an embodiment of the present disclosure.

[0046] 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.

[0047] The temperature sensor 210 is installed on the stove and is used to obtain the temperature of a heated area of a pot.

[0048] 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.

[0049] 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.

[0050] As shown in Figure 3 , the control method for preventing dry burning of the stove includes the following steps.

[0051] In step S301, the processor detects the current stove fire and determines a current water cooking condition corresponding to the current stove fire.

[0052] In step S302, the processor collects pot temperature information under the current stove fire.

[0053] In step S303, when the pot temperature information meets the current water cooking condition, the processor performs a corresponding dry burning prevention operation according to the water cooking state and the pot temperature information.

[0054] The water cooking condition refers to a determination condition for determining that the state in the pot is water cooking under the current stove fire.

[0055] 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 current time and the set time period before the current time can be determined.

[0056] The dry burning prevention operation refers to a stove fire adjustment operation related to dry burning prevention control. It can include maintaining the current stove fire, reducing the stove fire, turning off the stove gas supply, and sending prompt information to the user. Among them, reducing the stove fire can be to reduce the fire and continue to supply a small amount of heat to the pot, or to reduce the fire to turn off the stove and stop supplying heat to the pot.

[0057] The determination condition of water cooking is different under different stove fires. This is because the temperature change of the water cooking state under different stove fires is different. For example, under the water cooking state, the pot temperature will fluctuate within a certain range after boiling. The fluctuation range of the temperature change is related to the current stove fire. Therefore, by combining the stove fire to determine the water cooking condition, the accuracy of determining the current cooking state in the pot can be improved.

[0058] In this way, the embodiments of the present disclosure determine the corresponding water cooking condition by combining the current stove fire to determine the cooking state, and then perform the dry burning prevention operation corresponding to the pot temperature information and the cooking state. The accuracy of determining the cooking state under the current stove fire is improved, and the accuracy of the dry burning prevention control is improved, and the false positive rate of the dry burning prevention is effectively reduced.

[0059] The following describes how to determine that the pot temperature information meets the current water cooking condition.

[0060] Figure 4 is a flowchart of a control method for preventing dry burning of a stove provided by the embodiments of the present disclosure, which is applied to the stove described above. In the embodiments of the present disclosure, the stove is taken as the execution subject, and the scheme is described.

[0061] As Figure 4 shown, the control method for preventing dry burning of the stove includes:

[0062] Step S401, detecting the current stove firepower, and determining the corresponding water cooking judgment parameter.

[0063] Here, the water cooking judgment parameter refers to the pot temperature reference value related to the water cooking state.

[0064] By establishing the correspondence between the current stove firepower and the water cooking judgment parameter, the accuracy of the current water cooking state determination can be improved.

[0065] Step S402, determining the current water cooking condition according to the water cooking judgment parameter; the current water cooking condition includes a boiling frequency threshold. The water cooking judgment parameter or the collection of water cooking judgment parameters is determined as the current water cooking condition, and is compared with the pot temperature information to determine the current cooking state.

[0066] Step S403, collecting pot temperature information under the current stove firepower.

[0067] The pot temperature information includes the current pot temperature and a set number of pot temperatures collected before the current time. The pot temperature can be collected by interval detection until the set number is met. When the number of collected pot temperatures meets the set number, a new pot temperature is obtained, and the cooking state and / or dry burning condition is determined.

[0068] Step S404, in the case that the pot temperature information indicates that the current state in the pot is boiling, the current boiling frequency is increased by 1.

[0069] The boiling state refers to the state that, in the safe cooking process of water cooking, the temperature in the pot reaches the boiling temperature, and the stove firepower does not change, and the temperature fluctuates within a small range above and below the boiling temperature. The detection of the boiling state can be used as one of the reliable parameters for determining the current cooking state of the pot.

[0070] Step S405, continue to collect the pot temperature, and when the current boiling frequency is greater than the boiling frequency threshold, determine that the pot temperature information meets the current water cooking condition.

[0071] The boiling frequency threshold is used to determine the stability and effectiveness of the current boiling detection result.

[0072] Due to changes in food in the pot, or adjustment of the stove firepower, etc., it may cause the pot to boil for a short time, but 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.

[0073] Step S406: Based on the water cooking status and pot temperature information, perform the corresponding anti-dry-boil operation.

[0074] Thus, this embodiment of the invention determines the corresponding cooking conditions with water by combining the current stove heat level, judges the cooking state, and then executes an anti-dry-burning operation corresponding to the pot temperature information and cooking state. This improves the accuracy of judging the cooking state under the current stove heat level, thereby improving the accuracy of anti-dry-burning control and effectively reducing the false judgment rate of anti-dry-burning.

[0075] Optionally, the parameters for determining cooking with water also include the upper limit of boiling, the lower limit of boiling, and the boiling temperature range corresponding to the current stove heat.

[0076] The current state of the pot is boiling, including the following:

[0077] The current pot temperature is greater than or equal to the lower boiling limit B. min And less than the upper limit of boiling B max Furthermore, the temperature difference ΔT between multiple cookware temperatures prior to the current cookware temperature is less than the boiling temperature range value ΔT. biol The temperature difference ΔT between multiple cookwares includes at least the temperature difference ΔT1 between two cookwares spaced apart by a first set time interval and the temperature difference ΔT2 between two cookwares spaced apart by a second set time interval.

[0078] Here, the lower limit of boiling is B. min Used to describe the minimum permissible boiling point of a cookware in a water-cooking state; upper limit of boiling point B. max This value is used to describe the maximum permissible boiling point of a cookware under water-cooking conditions; the boiling temperature range value ΔT. biol This describes the reasonable range of temperature fluctuation of a cookware relative to the boiling temperature during cooking with water.

[0079] When the current cookware temperature is greater than or equal to the lower boiling limit B min Less than the upper limit of boiling B max Furthermore, multiple temperature differences ΔT1, ΔT2, etc., are all less than the boiling temperature range value ΔT. biol In this case, determine that the current state inside the pot is boiling, and set the current pot temperature to the current boiling temperature T. biol Continuously monitor the pot temperature; for each instance of reaching a boiling state, record the boiling count as B. num Add 1. When the number of boiling times is greater than the boiling time threshold N1 for cooking with water, the current cooking state is determined to be cooking with water.

[0080] Optionally, based on the current stove heat, the corresponding water-cooking judgment parameters are determined, including:

[0081] determining one or more of a boiling frequency threshold value, a boiling upper limit value, a boiling lower limit value, a boiling temperature range value according to the stove fire power;

[0082] wherein the boiling frequency threshold value is negatively correlated with the stove fire power; the boiling upper limit value, the boiling lower limit value, and the boiling temperature range are positively correlated with the stove fire power.

[0083] Specifically, the boiling temperature range is determined according to the fire power of the stove. Generally, under different heating conditions, the fluctuation range of the boiling temperature of the pot is different, so that the accurate dry burning prevention of the pot under the boiling state is realized according to the degree of fire power, and the misjudgment rate of dry burning prevention is effectively reduced.

[0084] The higher the stove fire power, the greater the value of the boiling temperature range. According to the linear relationship between the stove fire power and the reasonable range value for expressing the boiling state, the boiling temperature range is positively correlated with the stove fire power. In the boiling state, the greater the stove fire power, the higher the heating degree, and the greater the rising space of the pot temperature; the smaller the stove fire power, the lower the degree of heating, and the more stable the temperature of the pot.

[0085] For example, according to the current stove fire power, the corresponding boiling temperature range includes:

[0086] The stove fire power is obtained, and the value of the boiling temperature range corresponding to the current stove fire power is obtained by looking up the pre-stored correlation. The pre-stored corresponding relationship includes a positive correlation between the one-to-one corresponding relationship of the stove fire power and the boiling temperature range. The correlation can be pre-stored in the controller of the stove, or the correlation 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 correlation is called to determine the value of the boiling temperature range according to the stove fire power.

[0087] The higher the stove fire power, the faster the consumption of water in the pot in the boiling stage, and the shorter the duration of the boiling stage. The boiling frequency threshold value is negatively correlated with the stove fire power.

[0088] For example, according to the current stove fire power, the corresponding boiling frequency threshold value includes:

[0089] The stove fire power is obtained, and the value of the boiling frequency threshold value corresponding to the current stove fire power is obtained by looking up the pre-stored correlation. The pre-stored corresponding relationship includes a negative correlation between the one-to-one corresponding relationship of the stove fire power and the boiling frequency threshold value. The correlation can be pre-stored in the controller of the stove, or the correlation 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 correlation is called to determine the value of the boiling frequency threshold value according to the stove fire power.

[0090] Optionally, in the case of changing the fire of the stove, the minimum boiling temperature after the fire is changed is set as the lower limit value B of boiling min ; the maximum boiling temperature after the fire is changed is set as the upper limit value B of boiling max .

[0091] Figure 5 is 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.

[0092] As shown in Figure 5 , the control method for preventing dry burning of the stove comprises:

[0093] Step S501, detecting the current fire of the stove, and determining the current water cooking condition corresponding to the current fire of the stove.

[0094] Step S502, collecting the pot temperature information under the current fire of the stove.

[0095] Step S503, in the case that the pot temperature information meets the current water cooking condition, obtaining a safe cooking model corresponding to the current fire of the stove.

[0096] Step S504, inputting the water cooking state and the pot temperature information into the safe cooking model, and outputting a safe cooking judgment result.

[0097] Step S505, performing a dry burning prevention operation corresponding to the safe cooking judgment result.

[0098] The safe cooking model is a judgment model established based on one or more groups of safe cooking judgment conditions related to the fire of the stove, and contains multiple factors such as cooking state and fire recognition, boiling temperature determination, dry burning stage temperature variation range, and boiling temperature variation range. By inputting the cooking state and the pot temperature information into the safe cooking model, the safe cooking judgment conditions preset in the model are compared, and a judgment result is output according to the comparison result to perform a dry burning prevention operation.

[0099] Figure 6 is 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.

[0100] As shown in Figure 6 , the control method for preventing dry burning of the stove comprises:

[0101] Step S601, obtaining the current fire of the stove.

[0102] Step S602, obtaining corresponding cooking judgment parameters from a preset database according to the stove fire, to constitute a cooking judgment condition.

[0103] Step S603, collecting pot temperatures to meet a set number. After collecting pot temperatures to meet a set number, a new dry burning prevention calculation and judgment are performed every time a new pot temperature is obtained.

[0104] Step S604, determining pot temperature information according to multiple pot temperatures.

[0105] Here, the pot temperature information includes the current pot temperature; the difference ΔT between multiple pot temperatures, at least including 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; 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.

[0106] The pot temperature can be calculated directly by a sensor; or the tail-removed average of multiple temperature values collected continuously for a 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.

[0107] Step S605, determining a current water cooking condition corresponding to the current stove fire. 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 fire obtained in step S602.

[0108] Step S606, determining 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, go to step S611.

[0109] 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 fire is changed is set as the initial boiling temperature T biol0 , and the maximum current boiling temperature obtained after the fire is changed is set as the maximum boiling temperature T biolmax .

[0110] Step S608, determining whether B num =1 is true. In B numIf the condition T

[0111] In step S609, T is set as the lowest boiling temperature T biol_min , and the process proceeds to step S611.

[0112] In step S610, it is determined whether the condition T biol < T biol_min is met. If the condition T biol < T biol_min is met, the process proceeds to step S609, otherwise, the process proceeds to step S611.

[0113] In step S611, it is determined whether the condition B num > N1 is met. If the condition B num > N1 is met, the process proceeds to step S611a. Otherwise, the process proceeds to step S621 to determine the waterless cooking state.

[0114] In step S611a, it is determined that the pot temperature information meets the current water cooking condition.

[0115] In step S612, if 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 , the water cooking state and the pot temperature information are input 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. 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.

[0116] In step S613, it is determined whether the multiple 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.

[0117] In step S614, it is determined whether the pot temperature information meets the safety cooking judgment condition 1. If the pot temperature information meets the safety cooking judgment condition 1, the process proceeds to step S615, otherwise, the process proceeds to step S620. In the multiple safety cooking judgment conditions, whether the pot temperature information meets the corresponding water safety cooking judgment condition is determined one by one in the set order.

[0118] The safety cooking judgment condition 1 includes:

[0119] The difference between the current pot temperature and the current boiling temperature is less than or equal to the first dry burning temperature rise 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 2T1.

[0120] That is, the safe cooking judgment condition 1 includes: T-T biol ≤T AFBT1 , and / or d 2 T≤-d 2 T1.

[0121] Step S615, determine whether the pot temperature information meets the safe cooking judgment condition 2. In the case of the pot temperature information meets the safe cooking judgment condition 2, enter step S616, otherwise enter step S620.

[0122] The safe cooking judgment condition 2 includes:

[0123] The difference between the current pot temperature and the current boiling temperature is less than or equal to the second dry heating rate judgment value T AFBT2 ; and / or, the second derivative d 2 T of the pot temperature within the fourth set time length is greater than or equal to the second derivative limit value d 2 T1.

[0124] That is, the safe cooking judgment condition 2 includes: T-T biol ≤T AFBT2 , and / or d 2 T≤-d 2 T1.

[0125] Wherein, T AFBT1 <T AFBT2 .

[0126] Step S616, determine whether the pot temperature information meets the safe cooking judgment condition 3. In the case of the pot temperature information meets the safe cooking judgment condition 3, enter step S617, otherwise enter step S620.

[0127] The safe cooking judgment condition 3 includes: the number of times that the change rate of the pot temperature exceeds the water cooking dry heating slope limit value dT1 is less than or equal to the water cooking dry heating continuous judgment number n1, and / or, the second derivative d 2 T of the pot temperature within the fourth set time length is greater than or equal to the second derivative limit value d 2 T1.

[0128] Step S617, determine whether the pot temperature information meets the safe cooking judgment condition 4. In the case of the pot temperature information meets the safe cooking judgment condition 4, enter step S618, otherwise enter step S620.

[0129] The safe cooking judgment condition 4 includes:

[0130] The current boiling temperature T biola difference between the initial boiling temperature T biol0 and the current boiling temperature T bioll is less than or equal to a boiling maximum temperature rise value ΔDT 2 ; and / or, a second derivative d 2 T of the pot temperature within a fourth set time length is greater than or equal to a waterless cooking second derivative limit value d biol T1.

[0131] That is, the safe cooking judgment condition 3 includes: T biol0 -T biol ≤ ΔT 2 T, and / or d 2 T1.

[0132] Step S618, determine whether the pot temperature information meets the safe cooking judgment condition 5. In the case where the pot temperature information meets the safe cooking judgment condition 5, enter step S619, otherwise enter step S620.

[0133] The safe cooking judgment condition 5 includes:

[0134] The current pot temperature T is less than or equal to a maximum safe temperature threshold D max , and / or the current pot temperature change rate is less than or equal to 0.

[0135] Step S619, output the safe cooking judgment result as safe, and return to step S601.

[0136] Step S620, output the safe cooking judgment result as dry burning, and turn off the gas supply of the stove, and prompt the user of 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.

[0137] 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.

[0138] Step S622, determine whether the pot temperature information meets the first waterless cooking condition. In the case where the pot temperature information meets the current first waterless cooking condition, enter step S624, otherwise enter step S623.

[0139] The current first waterless cooking condition includes:

[0140] The current pot temperature is greater than or equal to a waterless cooking lower limit value S min , and less than a waterless cooking upper limit value S max; and, 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); wherein the difference AT between the plurality of pot temperatures includes at least the difference AT1 between two pot temperatures separated by a first set time duration and the difference AT2 between two pot temperatures separated by a second set time duration.

[0141] Step S623, determine whether the pot temperature information satisfies the second waterless cooking condition. In the case that the pot temperature information satisfies the current second waterless cooking condition, determine that the current in-pot state is the waterless cooking state. Go to step S624, otherwise, go to step S626. That is, in the case that the pot temperature information satisfies the current first waterless cooking condition or the current second waterless cooking condition, determine that the current cooking state is the waterless cooking state.

[0142] The current second waterless cooking condition includes:

[0143] 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 boiling slope limit dT2; and, the current pot temperature T is less than or equal to the waterless cooking dry boiling threshold D smax .

[0144] 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.

[0145] Step S624, the pot temperature information satisfies the current waterless cooking condition. Determine that the current in-pot state is the waterless cooking state.

[0146] 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 boiling threshold D smax , input the waterless cooking state and the pot temperature information into the safety cooking model. Here, it is necessary to obtain the current pot temperature and the cooking safety threshold value corresponding to the current waterless cooking state, and in the embodiment of the present disclosure, the waterless cooking dry boiling threshold D smax is taken as the cooking safety threshold value corresponding to the current waterless cooking state.

[0147] Step S626, determine one or more safety cooking judgment conditions corresponding to the waterless cooking state in the safety cooking model. 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.

[0148] Step S627, determine whether the pot temperature information meets the safety cooking judgment condition 6. In the case of pot temperature information meets the safety cooking judgment condition 6, enter step S618, otherwise enter step S620. In step S618, the numerical comparison of the front pot temperature T and the maximum safety temperature threshold D max The value comparison is performed again, so that the current boiling number is continuously obtained until the current pot temperature is greater than the maximum safety temperature threshold, and the gas supply of the stove is turned off. In this way, after judging that there is no water cooking, the water cooking mode recognition can continue, which can adapt to the scene of adding water and ingredients during cooking.

[0149] Among them, the safety cooking judgment condition 6 includes:

[0150] The number of continuous 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 n2; and / or, the second derivative of the current pot temperature is less than the waterless cooking dry burning second derivative limit d 2 T2 is negative.

[0151] Step S628, input the unknown mode cooking state and the pot temperature information into the safety 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 turned on or the fire power changes.

[0152] Step S629, determine one or more safety cooking judgment conditions corresponding to the unknown mode cooking state in the safety cooking model. In the embodiment, the safety judgment condition corresponding to the unknown mode cooking state in the safety cooking model includes the safety cooking judgment condition 5, that is, enter step S618.

[0153] Optionally, the cooking judgment parameters used in the above embodiment are obtained from a preset database according to the current stove fire power.

[0154] Further, according to the current stove fire power, the corresponding cooking judgment parameter is determined, including:

[0155] Obtain the stove fire power, and obtain the cooking judgment parameter corresponding to the current stove fire power by looking up the pre-stored association relationship. The pre-set corresponding relationship includes the one-to-one corresponding relationship of 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.

[0156] For example, according to the current stove fire power, the corresponding cooking judgment parameter is determined, including:

[0157] obtaining an initial cooking judgment parameter;

[0158] adjusting the initial cooking judgment parameter according to an association relationship between the current stove fire and the cooking judgment parameter.

[0159] The association relationship of the one-to-one correspondence relationship between the stove fire and the one or more cooking judgment parameters can be pre-stored in a database in the form of a table. Table 2 shows an example of the above association relationship.

[0160] Table 2

[0161]

[0162]

[0163] Thus, by using the control method for stove dry burning prevention provided by the embodiments of the present disclosure, the corresponding cooking judgment parameter can be determined in combination with the current stove fire, so as to improve the accuracy of the cooking safety judgment under the current stove fire. At the same time, instead of directly using the pot bottom temperature, the collected multiple temperature values or the tail-averaged value within the set time are used as the equivalent temperature for calculation, which can avoid the 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 by the pot temperature changes within different time lengths, and the boiling temperature and the boiling frequency are used to judge whether it is a water cooking mode, which considers the temperature changes within different time lengths, so that the cooking state judgment is more accurate. The boiling and waterless cooking states are determined by the pot temperature changes within different time lengths, and the temperature changes within different time lengths are considered, so that the cooking state judgment is more accurate. By using the safety cooking model with built-in safety cooking judgment conditions, 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 pot type, cooking food amount, water amount, fire size, fire change, etc., has a wide range of adaptation, and the judgment is more accurate and timely.

[0164] Figure 7 is a schematic diagram of a control device for stove dry burning prevention provided by an embodiment of the present disclosure. The control device for stove dry burning prevention can be realized by software, hardware or a combination of both.

[0165] In combination with Figure 7As shown, the embodiment of the present disclosure provides a control device 700 for preventing dry burning of a stove, which comprises 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 detect a current stove firepower and determine a current water cooking condition corresponding to the current stove firepower. The pot temperature acquisition module 72 is configured to acquire pot temperature information under the current stove firepower. The execution module 73 is configured to, in a case where the pot temperature information satisfies the current water cooking condition, execute a corresponding dry burning prevention operation according to a water cooking state and the pot temperature information.

[0166] In combination Figure 8 As shown, the embodiment of the present disclosure provides a control device 800 for preventing dry burning of a stove, which comprises a processor 810 and a memory 801. Optionally, the device can further comprise a communication interface 802 and a bus 803. Wherein the processor 810, 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 810 can invoke the logic instructions in the memory 801 to execute the control method for preventing dry burning of a stove in the above-mentioned embodiments.

[0167] In addition, the logic instructions in the memory 801 described above can be implemented in the form of a software functional unit and sold or used as an independent product, which can be stored in a computer readable storage medium.

[0168] The memory 801 as a kind of 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 810 executes the function application and data processing by running the program instructions / modules stored in the memory 801, that is, realizes the control method for preventing dry burning of a stove in the above-mentioned embodiments.

[0169] The memory 801 can include a program storage area and a data storage area, wherein the program storage area can store an operating system, at least one application required by a function; The data storage area can store data created according to the use of the terminal device and the like. In addition, the memory 801 can include a high-speed random access memory, and can also include a non-volatile memory.

[0170] In combination Figure 9As 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 as 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 being placed inside 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, thereby realizing other feasible embodiments.

[0171] The embodiment of the present disclosure provides a computer readable storage medium, which stores computer executable instructions, and the computer executable instructions are configured to execute the control method for preventing dry burning of the stove.

[0172] The technical solution of the embodiment 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 to make a computer device (which can be a personal computer, a server, or a network device, etc.) execute all or part of the steps of the method described in the embodiment 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, Read-Only Memory), a random access memory (RAM, Random Access Memory), a magnetic disk or an optical disk, etc. various media that can store program codes.

[0173] The foregoing description and accompanying drawings fully illustrate embodiments of this disclosure to enable those skilled in the art to practice them. Other embodiments may include structural, logical, electrical, procedural, and other changes. The embodiments represent only possible variations. Individual components and functions are optional unless explicitly required, and the order of operation may vary. Parts and features of some embodiments may be included in or replace parts and features of other embodiments. Moreover, the terminology used in this application is for describing embodiments only and is not intended to limit the claims. As used in the description of embodiments and claims, the singular forms “a,” “an,” and “the” are intended to equally include the plural forms unless the context clearly indicates otherwise. Similarly, the term “and / or” as used in this application means including one or more of the associated listed items and all possible combinations thereof. Additionally, when used in this application, the term "comprise" and its variations "comprises" and / or "comprising" refer to the presence of stated features, integrals, steps, operations, elements, and / or components, but do not exclude the presence or addition of one or more other features, integrals, steps, operations, elements, components, and / or groups thereof. Without further limitations, an element defined by the phrase "comprises a..." does not exclude the presence of other identical elements in the process, method, or apparatus that includes said element. In this document, each embodiment may focus on the differences from other embodiments, and similar or identical parts between embodiments can be referred to mutually. For methods, products, etc., disclosed in the embodiments, if they correspond to the method section disclosed in the embodiments, the relevant parts can be referred to the description of the method section.

[0174] Those skilled in the art will recognize that the units and algorithm steps of the various examples described in conjunction with the embodiments disclosed herein can be implemented in electronic hardware, or a combination of computer software and electronic hardware. Whether these functions are implemented in hardware or software depends on the specific application and design constraints of the technical solution. Those skilled in the art can use different methods to implement the described functions for each specific application, but such implementation should not be considered beyond the scope of the embodiments of this disclosure. Those skilled in the art will clearly understand that, for the sake of convenience and brevity, the specific working processes of the systems, devices, and units described above can be referred to the corresponding processes in the foregoing method embodiments, and will not be repeated here.

[0175] In the embodiments disclosed herein, the disclosed methods, products (including but not limited to apparatuses, devices, etc.), can be implemented in other manners. For example, the described apparatus embodiments can be implemented only in a form of a logical function, and can be implemented by using a manner such as software (for example, application program) or the like. In some embodiments, 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 displayed or discussed coupling or direct coupling or indirect coupling between different units, or the coupling or direct coupling or indirect coupling between the displayed or discussed communication connections can be in a form of electrical, mechanical or other forms.

[0176] The flowcharts and block diagrams in the drawings show the possible implementation architectures, functions and operations of the system, method and computer program product according to the embodiments of the present disclosure. In this regard, each block in the flowcharts or block diagrams can represent a module, a program segment or a part of code containing one or more executable instructions for implementing a specified logical function. In some alternative implementations, the functions noted in the blocks can occur in an order different from that noted in the drawings. For example, two consecutive blocks can actually be executed substantially in parallel, and sometimes they can be executed in reverse order, depending on the functions involved. In the descriptions corresponding to the flowcharts and block diagrams in the drawings, the operations or steps corresponding to different blocks can also occur in an order different from that disclosed in the descriptions, and sometimes there is no specific order between different operations or steps. For example, two consecutive operations or steps can actually be executed substantially in parallel, and sometimes they can be executed in reverse order, depending on the functions involved. Each block in the block diagrams and / or flowcharts, and the combination of blocks in the block diagrams and / or flowcharts, can be implemented by a dedicated hardware-based system that performs the specified functions or actions, or can be implemented by a combination of dedicated hardware and computer instructions.

Claims

1. A control method for preventing dry boiling of a cooking appliance, characterized in that, The method comprises the following steps: detecting a current stove fire, determining a current water cooking condition corresponding to the current stove fire; collecting pot temperature information under the current stove fire; in the case that the pot temperature information meets the current water cooking condition, performing a corresponding dry burning prevention operation according to the water cooking state and the pot temperature information; wherein, according to the water cooking state and the pot temperature information, performing a corresponding dry burning prevention operation, comprising: obtaining a safe cooking model corresponding to the current stove fire; inputting the water cooking state and the pot temperature information into the safe cooking model to output a safe cooking judgment result; performing a dry burning prevention operation corresponding to the safe cooking judgment result; the safe cooking model comprises a plurality of safe cooking judgment conditions; The safety cooking judgment condition includes: a difference between the current pot temperature and the current boiling temperature is less than or equal to a first dry boiling temperature judgment value T AFBT1 ; and / or, a second derivative d 2 T of the pot temperature in a fourth set time length is less than or equal to a water cooking dry boiling second derivative limit value d 2 T1. The safe cooking judgment condition further comprises: the number of times that the change rate of the pot temperature exceeds the water cooking dry burning slope limit value dT1 is less than or equal to the water cooking dry burning continuous judgment number n1, and / or, the second derivative d 2 T of the pot temperature in the fourth set time length is greater than or equal to the water cooking dry burning second derivative limit value d 2 T1 is a negative value; The safe cooking determination condition further comprises: the current pot temperature T is less than or equal to a maximum safe temperature threshold D max , and / or the current pot temperature change rate is less than or equal to 0.

2. The control method according to claim 1, characterized by, the detection of the current stove fire and the determination of the current water cooking condition corresponding to the current stove fire comprise: determining a corresponding water cooking judgment parameter according to the current stove fire; determining the current water cooking condition according to the water cooking judgment parameter.

3. The control method according to claim 2, characterized by, The water cooking judgment parameter comprises a boiling frequency threshold value; the pot temperature information meeting the current water cooking condition comprises: in the case that the pot temperature information indicates that the current pot state is a boiling state, the current boiling frequency increases by 1; continue to collect the pot temperature, and in the case that the current boiling frequency is greater than the boiling frequency threshold value, determine that the pot temperature information meets the current water cooking condition.

4. The control method according to claim 3, characterized by, The water cooking judgment parameter further comprises a boiling upper limit value, a boiling lower limit value and a boiling temperature range value corresponding to the current stove fire; the case that the pot temperature information indicates that the current pot state is a boiling state comprises: the current pot temperature is greater than or equal to the boiling lower limit value and less than the boiling upper limit value; and the difference between the current pot temperature and the plurality of pot temperatures is less than the boiling temperature range value; wherein the difference between the plurality of pot temperatures at least comprises the difference between the two pot temperatures with a first set time interval and the difference between the two pot temperatures with a second set time interval.

5. The control method according to claim 4, characterized by determining a corresponding water cooking judgment parameter according to the stove fire, comprising: determining one or more of the boiling frequency threshold value, the boiling upper limit value, the boiling lower limit value and the boiling temperature range value according to the stove fire; wherein, the boiling frequency threshold value is negatively correlated with the stove fire; the boiling upper limit value, the boiling lower limit value and the boiling temperature range value are positively correlated with the stove fire.

6. A control device for preventing dry boiling of a cooking appliance, characterized in that, The method comprises the following steps: a stove fire determination module configured to detect a current stove fire and determine a current water cooking condition corresponding to the current stove fire; a pot temperature collection module configured to collect pot temperature information under the current stove fire; an execution module configured to, in the case that the pot temperature information meets the current water cooking condition, perform a corresponding dry burning prevention operation according to the water cooking state and the pot temperature information; wherein, according to the water cooking state and the pot temperature information, performing a corresponding dry burning prevention operation, comprising: obtaining a safe cooking model corresponding to the current stove fire; inputting the water cooking state and the pot temperature information into the safe cooking model to output a safe cooking judgment result; performing a dry burning prevention operation corresponding to the safe cooking judgment result; the safe cooking model comprises a plurality of safe cooking judgment conditions; The safety cooking judgment condition includes: a difference between the current pot temperature and the current boiling temperature is less than or equal to a first dry boiling temperature judgment value T AFBT1 ; and / or, a second derivative d 2 T of the pot temperature in a fourth set time length is less than or equal to a water cooking dry boiling second derivative limit value d 2 T1. The safe cooking judgment condition further comprises: the number of times that the change rate of the pot temperature exceeds the water cooking dry burning slope limit value dT1 is less than or equal to the water cooking dry burning continuous judgment number n1, and / or, the second derivative dT2 of the pot temperature in the fourth set time length is greater than or equal to the water cooking dry burning second derivative limit value dT2 2 T is greater than or equal to the water cooking dry burning second derivative limit value dT2 2 T1 is a negative value; The safe cooking determination condition further comprises: the current pot temperature T is less than or equal to a maximum safe temperature threshold D max , and / or the current pot temperature change rate is less than or equal to 0.

7. 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 execute, when running the program instructions, the control method for dry burn prevention of a cooking appliance according to any one of claims 1 to 5.

8. A hob, characterized in that Comprise: A cooking appliance body; The control device for dry burn prevention of a cooking appliance according to claim 6 or 7 is installed on the cooking appliance body.

9. A computer readable storage medium storing program instructions, characterized in that, The program instructions, when running, are used to cause a computer to execute the control method for dry burn prevention of a cooking appliance according to any one of claims 1 to 5.

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