Control method and device for preventing dry burning of kitchen range, kitchen range and computer readable storage medium

Abstract

The invention relates to the technical field of intelligent household appliances, and discloses a control method for preventing dry burning of a stove, and the control method comprises the following steps: detecting the current stove fire power, and determining the current water cooking condition corresponding to the current stove fire power; collecting cookware temperature information under the current cooker fire power; and under the condition that the pot temperature information meets the current water cooking condition, executing corresponding dry burning prevention operation according to the water cooking state and the pot temperature information. The corresponding water cooking condition is determined by combining the current cooker fire power, the cooking state is judged, and therefore the dry burning prevention operation corresponding to the cookware temperature information and the cooking state is executed. The accuracy of judging the cooking state under the current stove fire is improved, then the accuracy of anti-dry-burning control is improved, and the misjudgment rate of anti-dry-burning is effectively reduced. The invention further discloses a control device for preventing dry burning of the kitchen range, the kitchen range and a computer storage medium.

Description

Technical Field

[0001] The present application relates to the technical field of smart home 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 Art

[0002] Dry burning refers to heating an empty pot for a long time. Due to the long heating time, the pot will dry out or burn. It is a common safety hazard in the kitchen. Dry burning of pots will cause the pots to change color and deform, and in serious cases, it may even cause a fire. At present, anti-dry burning functions are common in household stoves. By automatically shutting down the stove when the pot reaches the set threshold, the anti-dry burning control of the pot is achieved, which plays a role in protecting the pot. However, cooking is a complex process. The type of pot, cooking mode, firepower, and the amount of ingredients in the pot will all affect the judgment of dry burning.

[0003] A related art provides a control method for preventing dry burning, which can determine whether the cooker is in a water cooking state or a waterless cooking state according to the temperature and temperature range of the pot, and obtain the anti-dry burning temperature value corresponding to the water cooking state or the waterless cooking state as the anti-dry burning temperature threshold of the cooker, thereby improving the control accuracy of the anti-dry burning.

[0004] In the process of implementing the embodiments of the present disclosure, it is found that there are at least the following problems in the related art:

[0005] When the cooking status is judged only based on the temperature information of the pot to achieve anti-dry-burn control, it is easy to cause misjudgment of the cooking status when the pot is not actually boiling, or the actual cooking status does not match the judgment result, and the anti-dry-burn effect is limited.

[0006] It should be noted that the information disclosed in the above background technology section is only used to enhance the understanding of the background of the present application, and therefore may include information that does not constitute the prior art known to ordinary technicians in the field. Summary of the invention

[0007] In order to provide a basic understanding of some aspects of the disclosed embodiments, a brief summary is given below. The summary is not an extensive review, nor is it intended to identify key / critical components or delineate the scope of protection of these embodiments, but rather serves as a prelude to the detailed description that follows.

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

[0009] In some embodiments, the control method for preventing dry-burning of a stove includes: detecting the current stove firepower and determining the current water cooking condition corresponding to the current stove firepower; collecting the pot temperature information under the current stove firepower; and when the pot temperature information meets the current water cooking condition, performing corresponding anti-dry-burning operations according to the water cooking state and the pot temperature information.

[0010] Optionally, detecting the current stove firepower and determining the current water-presence cooking condition corresponding to the current stove firepower includes: determining corresponding water-presence cooking judgment parameters according to the current stove firepower; and determining the current water-presence cooking condition according to the water-presence cooking judgment parameters.

[0011] Optionally, the water-presence cooking judgment parameter includes a boiling number threshold; the pot temperature information satisfies the current water-presence cooking condition including: when the pot temperature information indicates that the current state in the pot is a boiling state, the current boiling number is increased by 1; the pot temperature is continued to be collected until the current boiling number is greater than the boiling number threshold, determining that the pot temperature information satisfies the current water-presence cooking condition.

[0012] Optionally, the water cooking judgment parameters also include a boiling upper limit value, a boiling lower limit value, and a boiling temperature range value corresponding to the current stove firepower; the pot temperature information indicates that the current state in the pot is a boiling state, including: 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 differences between multiple pot temperatures before the current pot temperature are all less than the boiling temperature range value; wherein the differences between multiple pot temperatures include 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, corresponding water cooking judgment parameters are determined according to the current stove firepower, including: determining one or more of the boiling number threshold, boiling upper limit value, boiling lower limit value, and boiling temperature range value according to the stove firepower; wherein the boiling number threshold is negatively correlated with the stove firepower; the boiling upper limit value, boiling lower limit value, and boiling temperature range are positively correlated with the stove firepower.

[0014] Optionally, according to the cooking state with water and the pot temperature information, corresponding anti-dry-burning operations are performed, including: obtaining a safe cooking model corresponding to the current stove firepower; inputting the cooking state with water and the pot temperature information into the safe cooking model, and outputting a safe cooking judgment result; and performing an anti-dry-burning operation corresponding to the safe cooking judgment result.

[0015] In some embodiments, the control device for preventing dry-burning of a stove includes: a stove firepower determination module, configured to detect the current stove firepower and determine the current water cooking condition corresponding to the current stove firepower; a pot temperature collection module, configured to collect pot temperature information under the current stove firepower; and an execution module, configured to execute corresponding anti-dry-burning operations according to the water cooking state and the pot temperature information when the pot temperature information meets the current water cooking condition.

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

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

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

[0019] The control method and device for preventing dry burning 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 combining the current stove power to determine the corresponding water cooking conditions, the cooking status is judged, and the anti-dry-burn operation corresponding to the pot temperature information and cooking status is performed. The accuracy of the judgment of the cooking status under the current stove power is improved, thereby improving the accuracy of the anti-dry-burn control and effectively reducing the misjudgment rate of the anti-dry-burn.

[0021] The above general description and the following description are exemplary and explanatory only and are not intended to limit the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] One or more embodiments are exemplarily described by corresponding drawings, which do not limit the embodiments. Elements with the same reference numerals in the drawings are shown as similar elements, and the drawings do not constitute a scale limitation, and wherein:

[0023] Figure 1 is a schematic diagram of a usage scenario of the cooker provided in an embodiment of the present disclosure;

[0024] Figure 2 is a schematic diagram of the connection relationship of the processors of the cooker provided in the embodiment of the present disclosure;

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

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

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

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

[0031] Fig. 9 It is a schematic diagram of a stove provided in an embodiment of the present disclosure. DETAILED DESCRIPTION

[0032] In order to be able to understand the features and technical contents of the embodiments of the present disclosure in more detail, the implementation of the embodiments of the present disclosure is described in detail below in conjunction with the accompanying drawings. The attached drawings are for reference only and are not used to limit the embodiments of the present disclosure. In the following technical description, for the convenience of explanation, a full understanding of the disclosed embodiments is provided through multiple details. However, one or more embodiments can still be implemented without these details. In other cases, to simplify the drawings, well-known structures and devices can be simplified for display.

[0033] The terms "first", "second", etc. in the specification and claims of the embodiments of the present disclosure and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the terms used in this way can be interchanged where appropriate, so that the embodiments of the embodiments of the present disclosure described herein. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions.

[0034] Unless otherwise stated, the term "plurality" means two or more.

[0035] In the embodiment of the present disclosure, the character " / " indicates that the preceding and following objects are in an "or" relationship. For example, A / B indicates: A or B.

[0036] The term "and / or" is a description of the association relationship between objects, indicating that three relationships can exist. For example, A and / or B means: A or B, or, A and B.

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

[0038] The anti-dry burning technology of stoves generally detects the temperature of the bottom of the pot through a temperature probe, and actively closes the gas channel when the temperature reaches the preset threshold to prevent accidents such as fire. However, cooking is a complex process. The type of pot, cooking mode, firepower, and the amount of ingredients in the pot will affect the judgment of dry burning. The existing methods are prone to problems such as untimely judgment and misjudgment of dry burning. The various thresholds set are often only for one type of pot, with a small scope of application and untimely judgment. For example, a thick-bottomed stone pot has a very high dry burning temperature, which may exceed 300°C. It may also cause the pot that has already been dry burned to not be judged as dry burning in time. For example, some cast iron pots have a very low boiling temperature and a very low temperature when dry burning occurs (about 100°C to 150°C). For this pot, the fixed dry burning threshold cannot judge dry burning in time. It can be seen that the conventional anti-dry burning strategy is limited by the type of pot, and the range of pot types that are suitable is small. On the other hand, under different stove firepower, the temperature changes of pots in different cooking states when dry burning are different.

[0039] This solution solves the problem of small application range and untimely judgment of stove anti-dry burning by establishing association and control logic for multiple factors such as cooking status and firepower identification, boiling temperature determination, temperature change range in the dry burning stage, and boiling temperature change range.

[0040] Figure 1 It is a schematic diagram of a usage scenario of the stove provided in an embodiment of the present disclosure.

[0041] Combination Figure 1 As shown, the usage scenario includes a stove 100 and a home cloud platform 110 for communicating with the stove 100. The stove 100 may be a common stove in a kitchen scenario such as a gas stove, an electromagnetic stove, an electric ceramic stove, an integrated stove, etc.

[0042] The cooker 100 can be connected to the home WiFi network and communicate with control terminals such as mobile phones and cloud servers. Users can also control the cooker 100 to execute cooking program instructions through a smartphone application.

[0043] The stove 100 communicates with the home cloud platform 110 via a WiFi network. The home cloud platform 110 is used to receive real-time status data of the stove 100 for subscription to the big data platform and application service, and also sends cooking program instructions from other business servers, big data platforms, application terminals, and smart terminals to the stove 100.

[0044] In other implementation scenarios of the present solution, a terminal device may also be included for communicating 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, etc. It may also be a smart home appliance, such as a smart refrigerator, a smart TV, a smart washing machine, a smart air conditioner, a smart speaker, a smart lamp, and a smart curtain, etc., or any combination thereof.

[0045] Figure 2 Schematic diagram of the connection relationship of the processor of the cooker provided in the embodiment of the present disclosure.

[0046] Combination 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 the temperature sensor 210 and the stove power controller 220 respectively.

[0047] The temperature sensor 210 is installed on the cooker to obtain the temperature of the heated area of ​​the cooker.

[0048] The stove power controller 220 is used to obtain the current stove power and adjust the stove power according to the command. Here, when the stove is a gas stove, the current stove power can be determined by obtaining the gas flow of the gas supply pipeline; or by the rotation angle of the stove knob; or by the opening of the gas flow regulating proportional valve to determine the current heating gear. When the stove is an induction cooker or an electric ceramic stove, the stove power controller can determine the current stove power by the current heating power.

[0049] Figure 3 This is a flow chart of a control method for preventing dry burning of a stove provided in an embodiment of the present disclosure, which is applied to the above-mentioned stove. The control method for preventing dry burning of a stove can be executed by a processor of the stove; it can also be executed in a server, such as a home cloud platform that communicates with the stove; it can also be executed at a terminal device, such as a smart phone or a control terminal of a smart home appliance. In the embodiment of the present disclosure, the processor of the stove is used as the execution subject to illustrate the scheme.

[0050] like Figure 3 As shown, the control method for preventing dry burning of a stove comprises:

[0051] Step S301: the processor detects the current fire power of the stove and determines the current water cooking condition corresponding to the current fire power of the stove.

[0052] Step S302: the processor collects the temperature information of the pot under the current fire power of the stove.

[0053] Step S303: When the pot temperature information satisfies the current water-cooking condition, the processor performs a corresponding dry-boiling prevention operation according to the water-cooking state and the pot temperature information.

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

[0055] The pot temperature information includes the current pot temperature and the pot temperature change information within the set time before the current moment. Through the pot temperature information, the temperature change of the pot at the current moment and within the set time before the current moment can be determined.

[0056] Anti-dry-burn operation refers to the stove power adjustment operation related to anti-dry-burn control. It may include maintaining the current stove power, reducing the stove power, shutting off the stove gas supply, sending prompt information to the user, etc. Among them, reducing the stove power may be to keep the stove supplying less heat to the pot after reducing the power, or to reduce the power until the stove shuts off the gas (power off), and stops supplying heat to the pot.

[0057] The conditions for determining whether there is water cooking are different under different stove powers. This is because the temperature changes in the water cooking state are different under different stove powers. For example, when there is water cooking, after the pot boils, the pot temperature will fluctuate within a certain range, and the temperature change range of this fluctuation is related to the current stove power. Therefore, by combining the stove power to determine the water cooking conditions, the accuracy of the current pot cooking state determination can be improved.

[0058] In this way, the disclosed embodiment determines the corresponding water-containing cooking condition by combining the current stove power, and judges the cooking state, thereby executing the anti-dry-burn operation corresponding to the pot temperature information and the cooking state. The accuracy of judging the cooking state under the current stove power is improved, thereby improving the accuracy of anti-dry-burn control and effectively reducing the misjudgment rate of anti-dry-burn.

[0059] How to determine whether the pot temperature information satisfies the current water cooking condition is described below in conjunction with a specific embodiment.

[0060] Figure 4 The flowchart of a control method for preventing dry burning of a stove provided in an embodiment of the present disclosure is applied to the above stove. In the embodiment of the present disclosure, the stove is used as the execution subject to illustrate the scheme.

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

[0062] Step S401, detecting the current fire power of the stove and determining corresponding water cooking judgment parameters.

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

[0064] By establishing a corresponding relationship between the current stove firepower and the water-presence cooking judgment parameter, the accuracy of judging the current water-presence cooking state in the pot can be improved.

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

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

[0067] The pot temperature information includes the current pot temperature and a set number of pot temperatures collected before the current moment. 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, each time a new pot temperature is obtained, a judgment of the cooking state and / or dry burning is performed.

[0068] Step S404: when the pot temperature information indicates that the current state of the pot is boiling, the current boiling number is increased by 1.

[0069] The boiling state refers to the state in which the temperature in the pot reaches the boiling temperature and the temperature fluctuates within a small range above and below the boiling temperature when the fire of the stove does not change during the safe cooking process with water. 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 until the current boiling number is greater than the boiling number threshold, and determine that the pot temperature information meets the current water cooking condition.

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

[0072] Due to changes in ingredients in the pot or adjustments to the stove power, the pot may boil for a short time, but it may not reach the stable boiling state required for dry-boiling prevention. By comparing the current boiling times with the boiling times threshold, the stability of the current boiling state can be determined.

[0073] Step S406, performing corresponding anti-dry-boiling operations according to the water cooking state and the pot temperature information.

[0074] In this way, the disclosed embodiment determines the corresponding water-containing cooking condition by combining the current stove power, and judges the cooking state, thereby executing the anti-dry-burn operation corresponding to the pot temperature information and the cooking state. The accuracy of judging the cooking state under the current stove power is improved, thereby improving the accuracy of anti-dry-burn control and effectively reducing the misjudgment rate of anti-dry-burn.

[0075] 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 firepower;

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

[0077] The current pot temperature is greater than or equal to the lower boiling limit B min , and less than the boiling upper limit B max ; and, the difference ΔT between the multiple pot temperatures before the current pot temperature is less than the boiling temperature range value ΔT biol Wherein, the difference ΔT between the multiple cookware temperatures includes at least a difference ΔT1 between two cookware temperatures separated by a first set time length and a difference ΔT2 between two cookware temperatures separated by a second set time length.

[0078] Here, the boiling lower limit value B min Used to express that the pot temperature is within the reasonable minimum allowable boiling value when cooking with water; boiling upper limit value B max Used to express the maximum allowable boiling value of the pot temperature when cooking with water; boiling temperature range value ΔT biol Used to express the reasonable fluctuation range of the pot temperature relative to the boiling temperature when cooking with water.

[0079] When the current pot temperature is greater than or equal to the lower boiling limit B min , less than the boiling limit value B max , and multiple temperature differences ΔT1, ΔT2, ... are all less than the boiling temperature range ΔT biol , the current state of the pot is determined to be boiling, and the current pot temperature is set to the current boiling temperature T biol . Continuously collect the temperature of the pot, and each time the boiling state is judged, the boiling number B num Add 1. When the number of boiling times is greater than the boiling number threshold N1 for cooking with water, it is determined that the current cooking state is cooking with water.

[0080] Optionally, corresponding water cooking judgment parameters are determined according to the current firepower of the stove, including:

[0081] Determine one or more of a boiling number threshold, a boiling upper limit value, a boiling lower limit value, and a boiling temperature range value according to the firepower of the stove;

[0082] Among them, the boiling number threshold is negatively correlated with the stove firepower; the boiling upper limit, boiling lower limit, and boiling temperature range are positively correlated with the stove firepower.

[0083] Specifically, the boiling temperature range is determined according to the firepower of the stove. Generally, under different heating conditions, the fluctuation range of the boiling temperature of the pot is different, so accurate dry-burn prevention of the pot in the boiling state is achieved according to the firepower, effectively reducing the misjudgment rate of dry-burn prevention.

[0084] The higher the stove power, the larger the boiling temperature range. According to the linear relationship between the stove power and the range of reasonable temperature under boiling conditions, there is a positive correlation between the boiling temperature range and the stove power. Under boiling conditions, the higher the stove power, the higher the degree of heating, and the greater the room for the pot temperature to rise; the lower the stove power, the lower the degree of heating, and the more stable the pot temperature.

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

[0086] Obtain the firepower of the stove, and obtain the value of the boiling temperature range corresponding to the current firepower of the stove by searching a pre-stored association relationship, wherein the preset corresponding relationship includes a positive correlation association relationship of a one-to-one correspondence between the firepower of the stove and the boiling temperature range. The association relationship can be pre-stored in the controller of the stove, or can be pre-stored in other smart home appliances connected to the stove. During the process of communication between the smart home appliances and the stove, the association relationship is retrieved to determine the value of the boiling temperature range according to the firepower of the stove.

[0087] The higher the stove power, the faster the water in the pot is consumed during the boiling stage, and the shorter the boiling stage is. There is a negative correlation between the boiling number threshold and the stove power.

[0088] For example, according to the current fire power of the stove, determining the corresponding boiling number threshold includes:

[0089] Obtain the firepower of the stove, and obtain the boiling number threshold value corresponding to the current stove firepower by searching the pre-stored association relationship, wherein the preset corresponding relationship includes a negative correlation association relationship between the one-to-one correspondence between the stove firepower and the boiling number threshold value, and the association relationship can be pre-stored in the controller of the stove, or can be pre-stored in other smart home appliances connected to the stove. In the process of mutual communication between the smart home appliances and the stove, the association relationship is retrieved to determine the value of the boiling number threshold value according to the stove firepower.

[0090] Optionally, when the firepower of the stove changes, the minimum boiling temperature after the firepower changes is set as the boiling lower limit value B min ; Set the maximum boiling temperature after the firepower changes to the boiling upper limit value B max .

[0091] Figure 5 The flowchart of a control method for preventing dry burning of a stove provided in an embodiment of the present disclosure is applied to the above stove. In the embodiment of the present disclosure, the stove is used as the execution subject to illustrate the scheme.

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

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

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

[0095] Step S503, when the pot temperature information satisfies the current water cooking condition, a safe cooking model corresponding to the current stove firepower is obtained.

[0096] Step S504: input the water cooking state and the pot temperature information into the safe cooking model, and output the safe cooking judgment result.

[0097] Step S505, executing an anti-dry-burning 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 firepower of the stove, which includes multiple factors such as cooking state and firepower identification, boiling temperature determination, temperature variation range in the dry burning stage, boiling temperature variation range, etc. The cooking state and pot temperature information are input into the safe cooking model, compared with the safe cooking judgment conditions preset in the model, and the judgment result is output according to the comparison situation, so as to perform the anti-dry burning operation.

[0099] Figure 6 The flowchart of a control method for preventing dry burning of a stove provided in an embodiment of the present disclosure is applied to the above stove. In the embodiment of the present disclosure, the stove is used as the execution subject to illustrate the scheme.

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

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

[0102] Step S602, obtaining corresponding cooking judgment parameters from a preset database according to the firepower of the stove to form cooking judgment conditions.

[0103] Step S603, collecting the temperature of the pot until the set number is met. After collecting the temperature of the pot until the set number is met, a new anti-dry-boiling calculation and judgment is performed every time a new pot temperature is obtained.

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

[0105] Here, the pot temperature information includes the current pot temperature; the difference ΔT between multiple pot temperatures, including at least the difference ΔT1 between two pot temperatures separated by a first set time and the difference ΔT2 between two pot temperatures separated by a second set time; the rate of change (first-order derivative) of the pot temperature within a third set time; and the second-order derivative of the pot temperature within a fourth set time.

[0106] The calculation can be performed using the pot temperature directly collected by the sensor; or the truncated average of multiple temperature values ​​collected over a continuous period of time can be calculated and used as the current equivalent temperature T. Based on the equivalent temperature T, the above-mentioned temperature difference, first-order derivative, second-order derivative, etc. can be calculated.

[0107] Step S605, determining the current water cooking condition corresponding to the current stove firepower. The water cooking condition at least includes the current boiling times B num > Water 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.

[0108] Step S606: When the current pot temperature T is greater than or equal to the boiling lower limit value B min And less than the boiling limit B max ; and multiple temperature differences ΔT1, ΔT2, ... are all less than the boiling temperature range value ΔT biol In the case of, it is determined that the current state in the pot is boiling. Otherwise, it proceeds to step S611.

[0109] Step S607, B num =B num +1, current boiling temperature T biol =T. At the same time, the minimum current boiling temperature obtained after the firepower changes is set as the initial boiling temperature T biol0 , set the maximum current boiling temperature obtained after the firepower changes to the maximum boiling temperature T biolmax .

[0110] Step S608, determine B num =1. num=1, go to step S609; otherwise, go to step S610.

[0111] Step S609, set T to the minimum boiling temperature T biol_min , proceed to step S611.

[0112] Step S610, determine T biol <T biol_min Is it true? biol <T biol_min If yes, go to step S609; otherwise, go to step S611.

[0113] Step S611, determine B num > Is N1 true? num >N1, the process proceeds to step S611a. Otherwise, the process proceeds to step S621 to determine the waterless cooking state.

[0114] Step S611a, determining whether the pot temperature information satisfies the current water cooking condition.

[0115] Step S612: when the current cooking time is greater than the set cooking time and the current pot temperature is greater than the lower limit of the dry-boiling temperature D min In the case of water cooking state and pot temperature information, the water cooking state and pot temperature information are input into the safe cooking model. Here, it is necessary to obtain the current pot temperature and the cooking safety threshold corresponding to the current water cooking state. In the embodiment of the present disclosure, the lower limit of the dry boiling temperature D min As the cooking safety threshold corresponding to the current cooking state with water.

[0116] Step S613, determining a plurality of safety cooking judgment conditions corresponding to the water-containing cooking state in the safety cooking model. In this embodiment, the safety judgment conditions corresponding to the water-containing cooking state in the safety cooking model include safety cooking judgment conditions 1 to 5.

[0117] Step S614, determining whether the pot temperature information satisfies safe cooking judgment condition 1. If the pot temperature information satisfies safe cooking judgment condition 1, proceed to step S615, otherwise proceed to step S620. Determine whether the pot temperature information satisfies the corresponding water safe cooking judgment condition in the multiple safe cooking judgment conditions one by one in the set order.

[0118] Safe cooking judgment conditions 1 include:

[0119] The difference between the current pot temperature and the current boiling temperature is less than or equal to the first dry-boiling temperature rise judgment value T AFBT1 and / or, the second-order derivative d of the pot temperature within the fourth set time 2 T is less than or equal to the second-order derivative limit value d for dry cooking with water 2T1.

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

[0121] Step S615, determining whether the pot temperature information satisfies the safe cooking judgment condition 2. If the pot temperature information satisfies the safe cooking judgment condition 2, proceed to step S616, otherwise proceed to step S620.

[0122] 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-boiling temperature rise judgment value T AFBT2 and / or, the second-order derivative d of the pot temperature within the fourth set time 2 T is greater than or equal to the second-order derivative limit value d for dry cooking with water 2 Negative value of T1.

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

[0125] Among them, T AFBT1 <T AFBT2 .

[0126] Step S616, determining whether the pot temperature information satisfies the safe cooking judgment condition 3. If the pot temperature information satisfies the safe cooking judgment condition 3, proceed to step S617, otherwise proceed to step S620.

[0127] Safe cooking judgment condition 3 includes: the number of consecutive times that the rate of change of the pot temperature exceeds the slope limit dT1 for dry cooking with water is less than or equal to the number of consecutive judgments of dry cooking with water n1, and / or the second-order derivative dT of the pot temperature within the fourth set time 2 T is greater than or equal to the second-order derivative limit value d for dry cooking with water 2 Negative value of T1.

[0128] Step S617, determining whether the pot temperature information satisfies the safe cooking judgment condition 4. If the pot temperature information satisfies the safe cooking judgment condition 4, proceed to step S618, otherwise proceed to step S620.

[0129] Safe cooking judgment conditions 4 include:

[0130] Current boiling temperature T biolWith the initial boiling temperature T biol0 The difference is less than or equal to the maximum boiling temperature rise value ΔDT bioll and / or, the second-order derivative d of the pot temperature within the fourth set time 2 T is greater than or equal to the second-order derivative limit value d for dry cooking with water 2 Negative value of T1.

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

[0132] Step S618, determining whether the pot temperature information satisfies the safe cooking judgment condition 5. If the pot temperature information satisfies the safe cooking judgment condition 5, proceed to step S619, otherwise proceed to step S620.

[0133] Safe cooking judgment conditions 5 include:

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

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

[0136] Step S620: Output the safe cooking judgment result as dry cooking, and shut off the gas supply of the stove to remind the user of dry cooking. At this time, the stove can be controlled to shut off the fire and gas and control the buzzer to alarm.

[0137] Step S621, determining the current waterless cooking condition corresponding to the current firepower of the cooker. The current waterless cooking condition at least includes the current first waterless cooking condition.

[0138] Step S622, determining whether the pot temperature information satisfies the first waterless cooking condition. If the pot temperature information satisfies the current first waterless cooking condition, proceed to step S624, otherwise proceed to step S623.

[0139] The current first waterless cooking conditions include:

[0140] 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 differences ΔT between multiple pot temperatures before the current pot temperature are all greater than the waterless cooking temperature variation range value U(T); wherein, the differences ΔT between multiple pot temperatures include at least 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.

[0141] Step S623, determining whether the pot temperature information satisfies the second waterless cooking condition. If the pot temperature information satisfies the current second waterless cooking condition, determining that the current pot state is the waterless cooking state. Going to step S624, otherwise, going to step S626. That is, if the pot temperature information satisfies the current first waterless cooking condition or the current second waterless cooking condition, determining that the current cooking state is the waterless cooking state.

[0142] The current second waterless cooking conditions include:

[0143] The differences ΔT between the multiple pot temperatures before the current pot temperature are all greater than the waterless cooking temperature change range value U(T); and the pot temperature change rate is less than the waterless cooking dry burning slope limit dT2; and the current pot temperature T is less than or equal to the waterless cooking dry burning threshold D smax .

[0144] The waterless cooking temperature variation range value U(T) can be determined according to the current pot temperature (or current equivalent temperature) T, and is negatively correlated with the current pot temperature T.

[0145] Step S624: The pot temperature information satisfies the current waterless cooking condition, and the current pot state is determined to be a waterless cooking state.

[0146] Step S625: when the current cooking time is greater than the set cooking time and the current pot temperature is greater than the waterless cooking dry-burning threshold D smax In the case of waterless cooking, the waterless cooking state and pot temperature information are input into the safe cooking model. Here, it is necessary to obtain the current pot temperature and the cooking safety threshold corresponding to the current waterless cooking state. In the embodiment of the present disclosure, the waterless cooking dry boiling threshold D smax As the cooking safety threshold corresponding to the current waterless cooking state.

[0147] Step S626, determining one or more safety cooking judgment conditions corresponding to the waterless cooking state in the safety cooking model. In this 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 safe cooking judgment condition 6. If the pot temperature information meets the safe cooking judgment condition 6, proceed to step S618, otherwise proceed to step S620. In step S618, the previous pot temperature T is compared with the maximum safe temperature threshold D again. max The current boiling times are continuously obtained by comparing the values ​​of the cooking pot and the gas supply to the cooker is turned off when the current pot temperature is greater than the maximum safe temperature threshold. In this way, the water cooking mode recognition will continue after it is determined to be waterless cooking, which can adapt to the scenario of adding water and ingredients during the cooking process.

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

[0150] The number of consecutive times that the slope of the pot temperature change is greater than the waterless dry-burning slope threshold is less than or equal to the number of consecutive judgments for waterless cooking dry-burning n2; and / or, the second-order derivative of the current pot temperature is less than the waterless cooking dry-burning second-order derivative limit d 2 Negative value of T2.

[0151] 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 situation where the cooking state cannot be determined according to the current pot temperature information, and also includes the situation where the pot cooking state is determined as the unknown mode cooking state when the cooker is turned on or the fire power changes.

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

[0153] Optionally, the cooking judgment parameters used in the above embodiments are all obtained from a preset database according to the current firepower of the stove.

[0154] Furthermore, according to the current firepower of the stove, corresponding cooking judgment parameters are determined, including:

[0155] The stove power is obtained, and the cooking judgment parameter corresponding to the current stove power is obtained by searching the pre-stored association relationship. The preset corresponding relationship includes a one-to-one correspondence between the stove power and one or more cooking judgment parameters. The association relationship can be pre-stored in the controller of the stove, or can be pre-stored in other smart home appliances connected to the stove. In the process of mutual communication between the smart home appliance and the stove, the association relationship is retrieved to determine the cooking judgment parameter according to the stove power.

[0156] For example, according to the current fire power of the stove, the corresponding cooking judgment parameters are determined, including:

[0157] Obtaining initial cooking judgment parameters;

[0158] According to the correlation between the current stove firepower and the cooking judgment parameter, the initial cooking judgment parameter is adjusted.

[0159] The one-to-one correspondence between the firepower of the cooker 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-mentioned association relationship.

[0160] Table 2

[0161]

[0162]

[0163] In this way, the control method for preventing dry burning of a stove provided by the embodiment of the present disclosure can determine the corresponding cooking judgment parameter in combination with the current stove firepower, thereby improving the accuracy of cooking safety judgment under the current stove firepower. At the same time, instead of directly using the pot bottom temperature, multiple temperature values ​​collected, or the tail-off average value within a set time are used as the equivalent temperature for calculation, which can avoid misjudgment caused by occasional short-term temperature anomalies and improve the reliability of detection data. The boiling and waterless cooking states are determined by the changes in pot temperature within different time periods, and whether it is a water cooking mode is determined by the boiling temperature and the number of boiling times. The temperature changes of different time periods are considered, so that the cooking state judgment is more accurate. The boiling and waterless cooking states are determined by the changes in pot temperature within different time periods, and the temperature changes of different time periods are considered, so that the cooking state judgment is more accurate. Through the safe cooking model with built-in safe cooking judgment conditions, each judgment condition is not mutually exclusive. In the water cooking mode, the boiling temperature and the first-order and second-order derivatives of the temperature change are used as the safe cooking judgment criteria, and in the waterless cooking mode, the pot bottom temperature and the first-order and second-order derivatives of the temperature change are used as the safe cooking judgment criteria. It is not affected by factors such as the type of pot, the amount of food being cooked, the amount of water, the size of the fire, changes in the fire, etc. It has a wide range of adaptability and can make more accurate and timely judgments.

[0164] Figure 7 1 is a schematic diagram of a control device for preventing dry burning of a stove provided in an embodiment of the present application. The control device for preventing dry burning of a stove can be implemented in the form of software, hardware or a combination of the two.

[0165] Combination Figure 7As shown, the embodiment of the present disclosure provides a control device 700 for preventing dry burning of a stove, comprising a stove power determination module 71, a pot temperature acquisition module 72 and an execution module 73. The stove power determination module 71 is configured to detect the current stove power and determine the current water cooking condition corresponding to the current stove power; the pot temperature acquisition module 72 is configured to collect pot temperature information under the current stove power; and the execution module 73 is configured to perform a corresponding dry burning prevention operation according to the water cooking state and the pot temperature information when the pot temperature information meets the current water cooking condition.

[0166] Combination Figure 8 As shown, the embodiment of the present disclosure provides a control device 800 for preventing dry burning of a stove, including a processor 810 and a memory 801. Optionally, the device may also include a communication interface 802 and a bus 803. Among them, the processor 810, the communication interface 802, and the memory 801 can communicate with each other through the bus 803. The communication interface 802 can be used for information transmission. The processor 810 can call the logic instructions in the memory 801 to execute the control method for preventing dry burning of the stove in the above embodiment.

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

[0168] The memory 801 is a computer-readable storage medium that can be used to store software programs and computer executable programs, such as program instructions / modules corresponding to the method in the embodiment of the present disclosure. The processor 810 executes the function application and data processing by running the program instructions / modules stored in the memory 801, that is, the control method for preventing dry burning of the stove in the above embodiment is realized.

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

[0170] Combination Fig. 9As shown, the embodiment of the present disclosure provides a stove 100, including: a product body, and the above-mentioned control device 700 (800) for preventing the stove from burning dry. The control device 700 (800) for preventing the stove from burning dry is installed in the product body. The installation relationship described here is not limited to placement inside the product, but also includes installation connections with other components of the product, including but not limited to physical connection, electrical connection or signal transmission connection, etc. It can be understood by those skilled in the art that the control device 700 (800) for preventing the stove from burning dry can be adapted to a feasible product body, thereby realizing other feasible embodiments.

[0171] An embodiment of the present disclosure provides a computer-readable storage medium storing computer-executable instructions, wherein the computer-executable instructions are configured to execute the above-mentioned control method for preventing dry-burning of a stove.

[0172] The technical solution of the embodiment of the present disclosure can be embodied in the form of a software product, which is stored in a storage medium and includes one or more instructions for causing a computer device (which may be a personal computer, a server, or a network device, etc.) to execute all or part of the steps of the method described in the embodiment of the present disclosure. The aforementioned storage medium may be a non-transient storage medium, such as a USB flash drive, a mobile hard disk, a read-only memory (ROM), a random access memory (RAM), a disk or an optical disk, and other media that can store program codes.

[0173] The above description and the accompanying drawings fully illustrate the embodiments of the present disclosure so that those skilled in the art can practice them. Other embodiments may include structural, logical, electrical, process and other changes. The embodiments represent only possible changes. Unless explicitly required, separate components and functions are optional, and the order of operation may vary. The parts and features of some embodiments may be included in or replace the parts and features of other embodiments. Moreover, the words used in this application are only used to describe the embodiments and are not used to limit the claims. As used in the description of the embodiments and the claims, unless the context clearly indicates, the singular forms of "a", "an" and "the" are intended to include plural forms as well. Similarly, the term "and / or" as used in this application refers to any and all possible combinations of listings containing one or more associated ones. In addition, when used in the present application, the term "comprise" and its variants "comprises" and / or comprising refer to the presence of stated features, wholes, steps, operations, elements, and / or components, but do not exclude the presence or addition of one or more other features, wholes, steps, operations, elements, components and / or groups thereof. In the absence of further restrictions, the elements defined by the sentence "comprising a ..." do not exclude the presence of other identical elements in the process, method or device comprising the elements. In this article, each embodiment may focus on the differences from other embodiments, and the same and similar parts between the various embodiments may refer to each other. For the methods, products, etc. disclosed in the embodiments, if they correspond to the method part disclosed in the embodiments, then the relevant parts can refer to the description of the method part.

[0174] Those skilled in the art will appreciate that the units and algorithm steps of each example described in conjunction with the embodiments disclosed herein can be implemented in electronic hardware, or a combination of computer software and electronic hardware. Whether these functions are performed in hardware or software may depend on the specific application and design constraints of the technical solution. The technicians may use different methods for each specific application to implement the described functions, but such implementations should not be considered to exceed the scope of the embodiments of the present disclosure. The technicians may clearly understand that, for the convenience and simplicity of description, the specific working processes of the systems, devices and units described above may refer to the corresponding processes in the aforementioned method embodiments, and will not be repeated here.

[0175] In the embodiments disclosed herein, the disclosed methods and products (including but not limited to devices, equipment, etc.) can be implemented in other ways. For example, the device embodiments described above are only schematic. For example, the division of the units can be only a logical function division. There may be other division methods in actual implementation, such as multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. In addition, the coupling or direct coupling or communication connection between each other shown or discussed can be through some interfaces, indirect coupling or communication connection of devices or units, which can be electrical, mechanical or other forms. The units described as separate components may or may not be physically separated, and the components displayed as units may or may not be physical units, that is, they may be located in one place, or they may be distributed on multiple network units. Some or all of the units may be selected according to actual needs to implement this embodiment. In addition, each functional unit in the embodiment of the present disclosure may be integrated in a processing unit, or each unit may exist physically alone, or two or more units may be integrated in one unit.

[0176] The flowchart and block diagram in the accompanying drawings show the possible architecture, function and operation of the system, method and computer program product according to the embodiment of the present disclosure. In this regard, each box in the flowchart or block diagram can represent a module, a program segment or a part of the code, and the module, the program segment or a part of the code contains one or more executable instructions for realizing the specified logical function. In some alternative implementations, the functions marked in the box can also occur in a different order from the order marked in the accompanying drawings. For example, two consecutive boxes can actually be executed substantially in parallel, and they can sometimes be executed in the opposite order, which can depend on the functions involved. In the description corresponding to the flowchart and the block diagram in the accompanying drawings, the operations or steps corresponding to different boxes can also occur in a different order from the order disclosed in the description, and sometimes there is no specific order between different operations or steps. For example, two consecutive operations or steps can actually be executed substantially in parallel, and they can sometimes be executed in the opposite order, which can depend on the functions involved. Each block in the block diagrams and / or flowcharts, and combinations of blocks in the block diagrams and / or flowcharts, may be implemented by a dedicated hardware-based system that performs the specified functions or actions, or may be implemented by a combination of dedicated hardware and computer instructions.

Claims

1. A control method for preventing dry burning of a stove, characterized in that: include: Detect the current stove power and determine the current water cooking condition corresponding to the current stove power; Collect the pot temperature information under the current stove fire power; When the pot temperature information satisfies the current water cooking condition, the corresponding anti-dry-boiling operation is performed according to the water cooking state and the pot temperature information.

2. The control method according to claim 1, characterized in that: The detecting the current stove power and determining the current water-available cooking condition corresponding to the current stove power includes: According to the current fire power of the stove, the corresponding water cooking judgment parameters are determined respectively; The current water-presence cooking condition is determined according to the water-presence cooking judgment parameter.

3. The control method according to claim 2, characterized in that: The water cooking judgment parameter includes a boiling number threshold; The pot temperature information meets the current water cooking condition including: When the pot temperature information indicates that the current state of the pot is boiling, the current boiling number is increased by 1; The pot temperature continues to be collected until the current boiling number is greater than the boiling number threshold, and it is determined that the pot temperature information meets the current water cooking condition.

4. The control method according to claim 3, characterized in that: The water cooking judgment parameters also include the boiling upper limit value, boiling lower limit value, and boiling temperature range value corresponding to the current stove firepower; The pot temperature information indicates that the current state of the pot is boiling, including: The current pot temperature is greater than or equal to the lower boiling limit and less than the upper boiling limit; and, The differences between multiple pot temperatures before the current pot temperature are all less than the boiling temperature range value; wherein the differences between the multiple pot temperatures at least include 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.

5. The control method according to claim 4, characterized in that: According to the current stove firepower, the corresponding water cooking judgment parameters are determined respectively, including: Determine one or more of a boiling number threshold, a boiling upper limit value, a boiling lower limit value, and a boiling temperature range value according to the firepower of the stove; Among them, the boiling number threshold is negatively correlated with the stove firepower; the boiling upper limit value, boiling lower limit value, and boiling temperature range value are positively correlated with the stove firepower.

6. The control method according to any one of claims 1 to 5, characterized in that: According to the water cooking status and pot temperature information, the corresponding anti-dry-boiling operation is performed, including: Obtain a safe cooking model corresponding to the current stove firepower; Input the water cooking state and pot temperature information into the safe cooking model, and output the safe cooking judgment result; The anti-dry cooking operation corresponding to the safe cooking judgment result is performed.

7. A control device for preventing dry burning of a stove, characterized in that: include: A stove power determination module is configured to detect the current stove power and determine the current water cooking condition corresponding to the current stove power; The pot temperature collection module is configured to collect the pot temperature information under the current stove fire power; The execution module is configured to execute a corresponding anti-dry-burning operation according to the water cooking state and the pot temperature information when the pot temperature information meets the current water cooking condition.

8. A control device for preventing dry burning of a stove, comprising a processor and a memory storing program instructions, characterized in that: The processor is configured to execute the control method for preventing dry burning of a cooker according to any one of claims 1 to 6 when running the program instructions.

9. A cooking appliance, characterized in that: include: Cooker body; The control device for preventing dry burning of a stove as claimed in claim 7 or 8 is installed on the stove body.

10. A computer-readable storage medium storing program instructions, characterized in that: When the program instructions are executed, the computer is used to execute the control method for preventing dry burning of a cooker according to any one of claims 1 to 6.

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