Control method of cooking utensil, cooking utensil and computer readable storage medium

Abstract

The embodiment of the invention provides a control method of a cooking utensil, the cooking utensil and a computer readable storage medium, and relates to the technical field of cooking equipment. The method comprises the following steps: acquiring a set temperature and a set time length in response to a working instruction corresponding to a cooking function, starting timing, and acquiring a timing time length; obtaining the top temperature and the bottom temperature of the cooking cavity in real time; according to the set temperature, the top temperature and the bottom temperature, an upper heating piece, a middle heating piece and a lower heating piece are controlled to work, and the cooking cavity is heated; and when the timing duration reaches the set duration, the upper heating piece, the middle heating piece and the lower heating piece are closed, so that more accurate temperature control is realized while the cooking temperature uniformity is improved, and the overall cooking performance is improved.

Description

Technical Field

[0001] The present application relates to the technical field of cooking equipment, and in particular to a cooking appliance control method, a cooking appliance, and a computer-readable storage medium. Background Art

[0002] An air fryer is a machine that can use air to "fry". It mainly uses air to replace the hot oil in the frying pan to cook the food. At the same time, the hot air blows away the moisture on the surface of the food, making the ingredients achieve an effect similar to that of frying.

[0003] At present, most air fryers use a single heat source or dual heat sources for heating. A single heat source means that a heating element and a fan are arranged above the cooking cavity of the air fryer, or a heating element and a fan are arranged below the cooking cavity; a dual heat source means that a heating element is arranged above and below the cooking cavity of the air fryer, and a fan is arranged above the cooking cavity. When cooking, the heating element and the fan are turned on, and the fan continuously blows the high-temperature air near the heating element into the cooking cavity, so that the air in the cooking cavity circulates quickly, and finally achieves the effect of high-temperature air wrapping the food. Summary of the invention

[0004] The embodiments of the present application propose a control method for a cooking appliance, a cooking appliance, and a computer-readable storage medium. By cooperating with an upper heating element, a middle heating element, a lower heating element, and a fan, the uniformity of the temperature in the cooking cavity is improved when cooking food, and the accuracy of temperature control during the cooking process is improved.

[0005] In a first aspect, an embodiment of the present application provides a control method for a cooking appliance, which is applied to the cooking appliance, wherein the cooking appliance comprises a cooking cavity, an upper heating element, a middle heating element, and a lower heating element; the upper heating element is located above the cooking cavity; the middle heating element is located in the middle of the side of the cooking cavity; the lower heating element is located below the cooking cavity; the method comprises: in response to a working instruction corresponding to a cooking function, obtaining a set temperature and a set duration, starting timing, and obtaining the timing duration; obtaining the top temperature and the bottom temperature of the cooking cavity in real time; according to the set temperature, the top temperature and the bottom temperature, controlling the upper heating element, the middle heating element and the lower heating element to operate and heat the cooking cavity; when the timing duration reaches the set duration, turning off the upper heating element, the middle heating element and the lower heating element.

[0006] In a second aspect, an embodiment of the present application provides a control device for a cooking utensil, which is applied to the cooking utensil, wherein the cooking utensil comprises a cooking cavity, an upper heating element, a middle heating element, and a lower heating element; the upper heating element is located above the cooking cavity; the middle heating element is located in the middle of the side of the cooking cavity; the lower heating element is located below the cooking cavity; the device comprises: an instruction response module, which is used to respond to a work instruction corresponding to a cooking function, obtain a set temperature and a set time, and start timing to obtain the timing time; a temperature acquisition module, which is used to obtain the top temperature and the bottom temperature of the cooking cavity in real time; a first device control module, which is used to control the upper heating element, the middle heating element, and the lower heating element to work according to the set temperature, the top temperature, and the bottom temperature to heat the cooking cavity; and a second device control module, which is used to turn off the upper heating element, the middle heating element, and the lower heating element when the timing time reaches the set time.

[0007] In a third aspect, an embodiment of the present application provides a cooking utensil, comprising: a cooking cavity; an upper heating element located above the cooking cavity; a middle heating element located in the middle of a side of the cooking cavity; a lower heating element located below the cooking cavity; a memory and a processor, wherein an application is stored in the memory, and the application is configured to, when called by the processor, enable the cooking utensil to execute the method described above.

[0008] In a fourth aspect, an embodiment of the present application provides a computer-readable storage medium, on which a program code is stored, and the program code is used to execute the method as described above when called by a processor.

[0009] The control method, cooking device and computer-readable storage medium provided by the embodiment of the present application obtain the set temperature and set time corresponding to the cooking function and start timing when receiving the work instruction corresponding to the cooking function; during the cooking process, the top temperature and the bottom temperature in the cooking cavity are obtained in real time, and the working states of the upper heating element, the middle heating element and the lower heating element are adjusted in real time according to the set temperature, the top temperature and the bottom temperature to achieve precise temperature control. At the same time, with the cooperation of the upper heating element, the middle heating element and the lower heating element, the entire cooking cavity can be evenly heated, thereby improving the uniformity of the temperature in the cooking cavity. That is, the control method, cooking device and computer-readable storage medium provided by the embodiment of the present application can more accurately control the temperature while improving the uniformity of the cooking temperature, thereby improving the overall cooking performance. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For those skilled in the art, other drawings can be obtained based on these drawings without creative work.

[0011] Figure 1 A schematic structural diagram of a single heat source air fryer provided by an exemplary embodiment of the present application is shown;

[0012] Figure 2 A schematic diagram of the structure of a cooking utensil provided in an embodiment of the present application is shown;

[0013] Figure 3 A schematic diagram showing a flow chart of a method for controlling a cooking appliance provided in an embodiment of the present application is shown;

[0014] Figure 4 A schematic flow chart of a method for controlling a cooking appliance provided in another embodiment of the present application is shown;

[0015] Figure 5 A schematic flow chart of a method for controlling a cooking appliance provided in another embodiment of the present application is shown;

[0016] Figure 6 A schematic flow chart of a method for controlling a cooking appliance provided in yet another embodiment of the present application is shown;

[0017] Figure 7 A schematic diagram showing the structure of a control device for a cooking device provided in an embodiment of the present application is shown;

[0018] Figure 8 A schematic diagram of the structure of a cooking utensil provided in an embodiment of the present application is shown. DETAILED DESCRIPTION

[0019] In order to enable those skilled in the art to better understand the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without making creative work are within the scope of protection of the present application.

[0020] At present, most air fryers on the market use a single heat source or dual heat sources for heating. A single heat source means that a heating element and a fan are arranged above the cooking cavity of the air fryer, or a heating element and a fan are arranged below the cooking cavity; a dual heat source means that a heating element is arranged above and below the cooking cavity of the air fryer, and a fan is arranged above the cooking cavity. When cooking, the heating element and the fan are turned on, and the fan continuously blows the high-temperature air near the heating element on the same side into the cooking cavity, so that the air in the cooking cavity circulates quickly, and finally achieves the effect of high-temperature air wrapping the food.

[0021] However, the above-mentioned single heat source and dual heat source air fryers have a certain problem of uneven temperature distribution. Taking a single heat source air fryer as an example, Figure 1 As shown in the figure, in a single heat source air fryer, when the fan is working, the high-temperature air will circulate in the direction shown by the arrow in the figure. The high-temperature air is first blown into the cooking cavity and diffused around, and then refluxed from the middle to complete the cycle. The heat in the refluxed air is partially consumed by the food, so the middle of the cooking cavity (i.e. Figure 1 The area indicated by the dotted line in the middle will produce a cold air area with insufficient temperature, resulting in uneven temperature distribution in the cooking cavity, affecting the cooking effect of the ingredients.

[0022] At the same time, for dual-heat source air fryers, since there is only a fan near the heating element on one side, the heat generated by the heating element on the other side cannot be quickly transferred, resulting in the collected temperature being higher than the actual temperature in the cooking chamber when the temperature on the side without the fan is collected. In order to keep the collected temperature consistent with the preset temperature, the power of the heating element on the side without the fan needs to be reduced, resulting in the actual working power of the heating element on the side without the fan being low, affecting the accuracy of the overall cooking temperature control.

[0023] Based on the above analysis, the inventor has proposed a control method for a cooking appliance, a cooking appliance, and a computer-readable storage medium provided in the embodiment of the present application after many experiments. When receiving a work instruction corresponding to a cooking function, the set temperature and set duration corresponding to the cooking function are obtained, and the timing is started; during the cooking process, the top temperature and the bottom temperature in the cooking cavity are obtained in real time, and the working states of the upper heating element, the middle heating element, and the lower heating element are adjusted in real time according to the set temperature, the top temperature, and the bottom temperature, so as to achieve precise temperature control. At the same time, with the cooperation of the upper heating element, the middle heating element, and the lower heating element, the entire cooking cavity can be evenly heated, thereby improving the uniformity of the temperature in the cooking cavity. That is, the control method for a cooking appliance, the cooking appliance, and the computer-readable storage medium provided in the embodiment of the present application can more accurately control the temperature while improving the uniformity of the cooking temperature, thereby improving the overall cooking performance.

[0024] See also Figure 2 , Figure 2The cooking device 100 includes a cooking cavity 110 , a fan 120 , an upper heating element 130 , a middle heating element 140 , a lower heating element 150 , a first sensor 160 , and a second sensor 170 .

[0025] In this embodiment, the upper heating element 130 is arranged above the cooking cavity 110, the middle heating element 140 is arranged in the middle of the side of the cooking cavity 110, the lower heating element 150 is arranged below the cooking cavity 110, and the fan 120 is arranged above the upper heating element 130 and facing the upper heating element 130; the first sensor 160 is located above the cooking cavity 110 to detect the top temperature of the cooking cavity 110, and the second sensor 170 is located below the cooking cavity 110 to detect the bottom temperature of the cooking cavity 110.

[0026] The cooking device 100 may be an air fryer or other cooking equipment, which is not limited here.

[0027] The upper heating element 130 may be a dry-burning electric heating tube. When working, the dry-burning electric heating tube uses air as a medium to transfer heat to the surrounding air, and then cooperates with the fan 120 to blow high-temperature air into the cooking cavity to heat the food.

[0028] The intermediate heating element 140 can be an electric heating belt or a dry-burning electric heating tube; in some embodiments, the intermediate heating element 140 can be arranged around the middle of the side of the cooking cavity, which is not limited here, as long as it can evenly heat the middle area of ​​the cooking cavity.

[0029] The lower heating element 150 may be an infrared heater. When working, the infrared heater directly irradiates the food with infrared radiation to transfer the temperature to the surface of the food, while the air in the middle is not heated and does not participate in the heat transfer. The use of an infrared heater with high heat transfer efficiency can reduce heat loss; at the same time, since the infrared rays are not irradiated on the second sensor 170, the influence on the temperature collection of the lower part of the cooking cavity 110 is also reduced. When collecting the temperature below the cooking cavity 110, the error between the collected temperature and the actual temperature is reduced, and the accuracy of temperature control is improved to a certain extent.

[0030] The first sensor 160 is disposed around the upper heating element 130. Figure 2 As shown, the first sensor 160 can be disposed on one side of the upper heating element 130, and the first sensor 160 can be a negative temperature coefficient thermistor sensor; the second sensor 170 is disposed around the lower heating element 150, as shown in FIG. Figure 2As shown, the second sensor 170 can be arranged on one side of the lower heating element 150, and the second sensor 170 can be a thermocouple sensor. It should be noted that within the temperature range of -55°C to 200°C, the negative temperature coefficient thermistor sensor has the advantages of high sensitivity, strong stability, high precision and low cost. Since the fan 120 transfers part of the heat generated by the upper heating element 130 to the cooking cavity 110 through air circulation, the temperature range of the top of the cooking cavity 110 can be suitable for the negative temperature coefficient thermistor sensor; and the infrared heater itself has a higher temperature, so that the temperature at the bottom of the cooking cavity 110 is higher than the measurement range of the negative temperature coefficient thermistor sensor, so it is necessary to use a thermocouple sensor with a larger measurement range to measure the temperature at the bottom of the cooking cavity 110.

[0031] In some embodiments, the rated powers of the upper heating element, the lower heating element, and the middle heating element may be reduced in sequence to ensure uniform heating of the cooking utensil.

[0032] See also Figure 3 , Figure 3 The flowchart of the control method of a cooking appliance provided by an embodiment of the present application is shown. The control method of the cooking appliance can be applied to a control device of a cooking appliance or a cooking appliance. The control method of the cooking appliance can specifically include the following steps S110 to S140.

[0033] Step S110: In response to the working instruction corresponding to the cooking function, the set temperature and the set duration are obtained, the timing is started, and the timing duration is obtained.

[0034] In some embodiments, in response to a function selection instruction, a cooking function corresponding to the function selection instruction can be determined; in response to a work instruction corresponding to the cooking function, a pre-set temperature and duration corresponding to the cooking function can be obtained as the set temperature and the set duration.

[0035] The working instruction refers to an instruction for making the cooking appliance work with a selected cooking function, and the working instruction can be triggered by a start button set on the cooking appliance.

[0036] The function selection instruction refers to an instruction for selecting from the preset cooking functions of the cooking appliance. The function selection instruction can be triggered by a function selection button set on the cooking appliance. Only one function selection button can be set, and different options can be presented by pressing it multiple times; or a function selection button can be set for each cooking function, which is not limited here.

[0037] For example, the cooking appliance is provided with a start button and multiple function selection buttons corresponding to multiple cooking functions; the user puts the ingredients into the cooking cavity, connects the power of the cooking appliance, and can select the cooking function by pressing the function selection button, such as selecting the "yogurt fermentation mode". At this time, the cooking equipment automatically sets the set temperature (for example, 45°C) and set time (for example, 25 minutes) corresponding to the "yogurt fermentation mode", and the user presses the start button to start the cooking process.

[0038] Step S120: acquiring the top temperature and the bottom temperature of the cooking cavity in real time.

[0039] In this embodiment, the top temperature of the cooking cavity is measured in real time by a first sensor in the cooking appliance, and the bottom temperature of the cooking cavity is measured in real time by a second sensor in the cooking appliance.

[0040] Step S130: According to the set temperature, the top temperature and the bottom temperature, the upper heating element, the middle heating element and the lower heating element are controlled to operate to heat the cooking cavity.

[0041] In some embodiments, if the top temperature is less than or equal to the first temperature and the bottom temperature is less than or equal to the second temperature, the first stage is entered; during the first stage, the upper heating element, the middle heating element and the lower heating element are controlled to operate at their respective preset powers.

[0042] The preset power may be the rated power, the first temperature refers to the difference between the set temperature and the first preset offset temperature, and the second temperature refers to the difference between the set temperature and the second preset offset temperature. It should be noted that when the cooking device is started to work, the cooking cavity needs to be gradually increased from a lower temperature (that is, there is a preheating process). During this process, the cooking cavity will consume a part of the heat. Therefore, in the first stage, the first preset offset temperature and the second preset offset temperature need to be set to represent the part of the heat consumed by preheating. By subtracting the offset temperature, the influence of the heat loss generated by the preheating process on the temperature control can be reduced.

[0043] Taking the "yogurt fermentation mode" as an example, the first preset offset temperature may be 20°C, and the second preset offset temperature may be 30°C. They may be set to other values ​​according to actual conditions and are not limited here.

[0044] It is understandable that during the first stage, the cooking cavity needs to heat up quickly, so the upper heating element, the middle heating element and the lower heating element are controlled to work at their respective rated powers to achieve a rapid heating effect.

[0045] In addition, the first speed may be the maximum speed of the fan, or may be a preset speed corresponding to a cooking function, which is not limited here.

[0046] In some embodiments, if the top temperature is greater than the first temperature and less than or equal to the third temperature, and the bottom temperature is greater than the second temperature and less than or equal to the fourth temperature, the second stage is entered; during the second stage, the power of the upper heating element is adjusted in real time according to the set temperature and the top temperature, the upper heating element is controlled to work with the adjusted power, and the middle heating element and the lower heating element are controlled to work with their respective preset powers.

[0047] The third temperature refers to the difference between the set temperature and the third preset offset temperature, and the fourth temperature refers to the difference between the set temperature and the fourth preset offset temperature.

[0048] It should be noted that during the cooking process, there will always be inevitable heat loss. Therefore, a third preset offset temperature and a fourth preset offset temperature need to be set in the second stage to represent part of the heat lost in the second stage. By subtracting the offset temperature, the impact of heat loss in the second stage on temperature control can be reduced.

[0049] Taking the "yogurt fermentation mode" as an example, the third preset offset temperature may be 12°C, and the fourth preset offset temperature may be 20°C. They may be set to other values ​​according to actual conditions and are not limited here.

[0050] In the second stage, the difference between the set temperature and the top temperature can be calculated in real time; the power adjustment amount of the upper heating element corresponding to the difference is determined; and the power of the upper heating element is adjusted based on the power adjustment amount of the upper heating element.

[0051] Among them, the cooking appliance pre-stores the correspondence between the "power adjustment amount of the upper heating element" and the "difference between the set temperature and the top temperature", which can be stored in the memory of the cooking appliance in the form of a correspondence table, which is not limited here.

[0052] It is understandable that the temperature in the cooking cavity is rapidly increased in the first stage, and after entering the second stage, the heating rate needs to be reduced to achieve more accurate temperature regulation. By calculating the difference between the set temperature and the top temperature in real time and adjusting the power of the upper heating element, the temperature regulation in the cooking cavity is made more accurate.

[0053] In some embodiments, if the top temperature is greater than the third temperature and less than or equal to the fifth temperature, and the bottom temperature is greater than the fourth temperature and less than or equal to the sixth temperature, the third stage is entered; during the third stage, the upper heating element is turned off, the middle heating element is controlled to work at a preset power (i.e., rated power), the power of the lower heating element is adjusted according to the set temperature and the top temperature, and the lower heating element is controlled to work at the adjusted power.

[0054] The fifth temperature refers to the difference between the set temperature and the fifth preset offset temperature, and the sixth temperature refers to the difference between the set temperature and the sixth preset offset temperature. Since there is always inevitable heat loss during the cooking process, the fifth preset offset temperature and the sixth preset offset temperature also need to be set in the third stage to indicate part of the heat lost in the third stage. By subtracting the offset temperature, the influence of the heat loss in the third stage on the temperature control is reduced.

[0055] Taking the "yogurt fermentation mode" as an example, the fifth preset offset temperature may be 4°C, and the sixth preset offset temperature may be 10°C. They may be set to other values ​​according to actual conditions and are not limited here.

[0056] In the third stage, the difference between the set temperature and the top temperature can be calculated in real time; the power adjustment amount of the lower heating element corresponding to the difference is determined; and the power of the lower heating element is adjusted based on the power adjustment amount of the lower heating element.

[0057] The correspondence between "the difference between the set temperature and the top temperature" and "the power adjustment amount of the lower heating element" can be pre-stored in the cooking appliance, and the storage form includes but is not limited to a preset correspondence table.

[0058] In the third stage, if the top temperature is greater than the fifth temperature and the bottom temperature is greater than the sixth temperature, the fourth stage is entered; in the fourth stage, the upper heating element and the lower heating element are turned off, and the power of the middle heating element is adjusted in real time according to the set temperature and the top temperature, and the middle heating element is controlled to work with the adjusted power.

[0059] It can be understood that when the temperature in the cooking cavity rises to meet the condition that "the top temperature is greater than the fifth temperature and the bottom temperature is greater than the sixth temperature", it means that the cooking cavity has reached the highest temperature of this cooking. At this time, the upper heating element and the lower heating element are turned off, and the middle heating element keeps heating with the power adjusted in real time, so that the temperature in the cooking cavity is slowly reduced to achieve the effect of keeping warm.

[0060] In the fourth stage, the method of "adjusting the power of the intermediate heating element in real time according to the set temperature and the top temperature" may include: calculating the difference between the set temperature and the top temperature in real time; determining the power adjustment amount of the intermediate heating element corresponding to the difference; and adjusting the power of the intermediate heating element based on the power adjustment amount of the intermediate heating element.

[0061] The corresponding relationship between the "difference between the set temperature and the top temperature" and the "power adjustment amount of the middle heating element" can be pre-stored in the cooking appliance, and the storage form includes but is not limited to a preset corresponding table. As an example, the corresponding relationship between the "difference between the set temperature and the top temperature" and the "power adjustment amount of the middle heating element" can be shown in Table 1:

[0062] Table 1

[0063] Difference -7 -6 -5 -4 -3 -2 -1 0 1 2 3 Power (W) 150 130 110 90 70 50 50 30 30 0 0

[0064] As shown in Table 1, as the difference between the set temperature and the top temperature becomes larger, the temperature in the cooking cavity gradually decreases, and the power of the middle heating element gradually decreases.

[0065] It is understandable that within the set time, the temperature in the cooking cavity will continue to decrease in the fourth stage. When the temperature in the cooking cavity decreases to "the top temperature is greater than the third temperature and less than or equal to the fifth temperature, and the bottom temperature is greater than the fourth temperature and less than or equal to the sixth temperature", if it has not reached the set time, the third stage can be entered from the fourth stage, and the heating steps of the third stage can be continued to increase the temperature. Through the adjustment between the third stage and the fourth stage, the temperature in the cooking cavity is maintained in a stable range, thereby achieving the effect of heat preservation.

[0066] S140: When the timing time reaches the set time, the upper heating element, the middle heating element and the lower heating element are turned off.

[0067] The control method of the cooking appliance provided in the embodiment of the present application, upon receiving the work instruction corresponding to the cooking function, obtains the set temperature and set time corresponding to the cooking function, and starts timing; during the cooking process, the top temperature and the bottom temperature in the cooking cavity are obtained in real time through the corresponding sensor, and the cooking process is divided into multiple stages according to the top temperature and the bottom temperature; for each stage, the working state of the upper heating element, the middle heating element and the lower heating element is adjusted in real time according to the set temperature, the top temperature and the bottom temperature, so as to achieve more accurate temperature control. At the same time, with the cooperation of the upper heating element, the middle heating element and the lower heating element, the uniformity of the temperature in the cooking cavity is improved. That is, the control method of the cooking appliance, the cooking appliance and the computer-readable storage medium provided in the embodiment of the present application can more accurately control the temperature while improving the uniformity of the cooking temperature, thereby improving the overall cooking performance.

[0068] See also Figure 4 , Figure 4 A flow chart of a cooking appliance control method provided by another embodiment of the present application is shown. The cooking appliance control method can be applied to a cooking appliance control device or a cooking appliance. The cooking appliance control method can specifically include the following steps S210 to S240.

[0069] Step S210: In response to the work instruction corresponding to the cooking function, the set temperature and the set duration are obtained, the timing is started, and the timing duration is obtained.

[0070] Step S220: acquiring the top temperature and the bottom temperature of the cooking cavity in real time.

[0071] The specific implementation of step S210 and step S220 can be found in step S110 and step S120, which will not be elaborated in detail in the embodiment of the present application.

[0072] Step S230: According to the set temperature, the top temperature and the bottom temperature, the fan, the upper heating element, the middle heating element and the lower heating element are controlled to operate to heat the cooking cavity.

[0073] Among them, for the control operations on the upper heating element, the middle heating element and the lower heating element in each stage, please refer to the relevant description in step S130, and the embodiment of the present application will not be described in detail here.

[0074] In some embodiments, during the first stage (the top temperature is less than or equal to the first temperature and the bottom temperature is less than or equal to the second temperature), the fan is controlled to rotate at a first preset speed, wherein the first preset speed may be the maximum speed of the fan.

[0075] In some embodiments, during the second stage (the top temperature is greater than the first temperature and less than or equal to the third temperature, and the bottom temperature is greater than the second temperature and less than or equal to the fourth temperature), the fan is controlled to continue to rotate at the first preset speed.

[0076] It is understandable that during the first and second stages, the cooking cavity needs to heat up quickly. Therefore, during the first and second stages, the fan is rotated at a first preset speed, which can quickly diffuse the heat generated by the heating element in the cooking cavity and improve the heating efficiency and uniformity.

[0077] In some embodiments, during the third stage (the top temperature is greater than the third temperature and less than or equal to the fifth temperature, and the bottom temperature is greater than the fourth temperature and less than or equal to the sixth temperature), the fan speed is adjusted to a second preset speed according to the cooking function, and the fan is controlled to rotate at the second preset speed, and the second preset speed is less than or equal to the first preset speed.

[0078] The preset speed of the fan corresponding to the third stage under the current cooking function can be obtained as the second preset speed; the speed of the fan is adjusted to the second preset speed. The third stage of each cooking function has a preset speed corresponding to the cooking function.

[0079] In some embodiments, during the fourth stage (the top temperature is greater than the fifth temperature and the bottom temperature is greater than the sixth temperature), the speed of the fan is adjusted to a third preset speed according to the cooking function, and the fan is controlled to rotate at the third preset speed, which is less than or equal to the first preset speed. The fourth stage of each cooking function has a preset speed corresponding to the cooking function.

[0080] The fan speed is reduced in the third and fourth stages to better control the cooking process. By adjusting the fan speed, the flow rate of the hot air can be changed, thus affecting the taste of the food. In each different stage, different preset speeds can be set according to actual cooking needs, so as to achieve different styles of cooking for the ingredients.

[0081] Step S240: When the timing duration reaches the set duration, the fan, the upper heating element, the middle heating element and the lower heating element are turned off.

[0082] The control method of the cooking appliance provided in the embodiment of the present application adjusts the speed of the fan according to the stage of the temperature in the cooking cavity, and cooperates with the upper heating element, the middle heating element and the lower heating element to achieve different styles of cooking of the food in the cooking cavity, while also being able to improve the cooking efficiency and the uniformity of heating.

[0083] For some examples, see Figure 5 Before the above step S240, the control method of the cooking appliance also includes steps S250 and S260. Steps S250 and S260 can be executed in the entire process from the start to the end of the cooking appliance to avoid the temperature of the cooking cavity being too high, thereby ensuring the safety of the cooking appliance.

[0084] Step S250: When the top temperature is greater than the first preset threshold or the bottom temperature is greater than the second preset threshold, record the current power of the upper heating element, the middle heating element, and the lower heating element and the current speed of the fan, control the upper heating element, the middle heating element, and the lower heating element to stop working, and control the fan to rotate at the first preset speed.

[0085] It is understandable that some cooking functions correspond to higher cooking temperatures. During the continuous high-temperature heating process, the cooking cavity may overheat and cause certain damage to the cooking appliance itself.

[0086] Therefore, during the whole cooking process, the top temperature and the bottom temperature of the cooking cavity are monitored. When the top temperature is greater than the first preset threshold or the bottom temperature is greater than the second preset threshold, it indicates that the cooking cavity is overheated and needs to be cooled down. During the cooling down, the upper heating element, the middle heating element and the lower heating element are turned off, and the fan is rotated at the first preset speed to quickly cool the inside of the cooking cavity. Before cooling, the current power of the upper heating element, the middle heating element and the lower heating element and the current speed of the fan are recorded so that after the cooling is completed, the cooking appliance can be restored to the working state before the cooling.

[0087] The first preset threshold may be a preset value above 220° C., and the second preset threshold may be a preset value above 370° C., and they may be set by themselves and are not limited here.

[0088] Step S260: When the top temperature is less than the third preset threshold or the bottom temperature is less than the fourth preset threshold, the upper heating element, the middle heating element, and the lower heating element are controlled to continue working using their respective current powers, and the fan is controlled to rotate using the current speed, wherein the third preset threshold is less than the first preset threshold, and the fourth preset threshold is less than the second preset threshold.

[0089] The third preset threshold value may be set to 120° C., and the fourth preset threshold value may be set to 200° C., which are not limited here.

[0090] Based on step S250 and step S260, when overheating occurs in the cooking cavity, the current working state of the cooking appliance can be recorded, the heat in the cooking cavity can be dissipated, and the cooking appliance can continue cooking in the recorded working state after the heat is dissipated, thereby protecting the cooking appliance itself from damage due to overheating.

[0091] For some examples, see Figure 6 Before step S240, the control method of the cooking appliance further includes steps S270 and S280. Steps S270 and S280 can be executed in the entire process from the start of the cooking appliance to the end of the work to ensure the safe use of the cooking appliance.

[0092] Step S270: In response to the switch corresponding to the cooking cavity being turned on, the current power of the upper heating element, the middle heating element, and the lower heating element and the current speed of the fan are recorded, and the fan, the upper heating element, the middle heating element, and the lower heating element are turned off.

[0093] During the cooking process, the user may open the cooking cavity to observe the cooking status of the ingredients. For example, assuming that the cooking cavity in the cooking appliance is in the shape of a drawer, the user can pull the cooking cavity out of the cooking appliance, and the displacement of the cooking cavity can trigger the micro switch inside the cooking appliance. In response to the triggering of the micro switch, the cooking appliance controls the fan, the upper heating element, the middle heating element, and the lower heating element to turn off, which saves resources and prevents the fan from blowing out high-temperature air to scald the user, thereby improving safety. Before shutting down, the current power of the upper heating element, the middle heating element, and the lower heating element and the current speed of the fan are recorded at this time, so that when the cooking cavity is returned to its original position later, the cooking appliance is controlled to continue to perform the cooking steps before the cooking cavity is shifted.

[0094] Among them, when the switch corresponding to the cooking cavity is turned on, the timing of the cooking appliance can be paused, and the timing can be resumed when the switch corresponding to the cooking cavity is turned off.

[0095] Step S280: In response to the switch corresponding to the cooking cavity being turned off, the upper heating element, the middle heating element and the lower heating element are controlled to continue to work using their respective current powers, and the fan is controlled to rotate using the current speed.

[0096] Based on step S270 and step S280, when the user opens the cooking cavity, the upper heating element, the middle heating element, the lower heating element and the fan are turned off, and when the cooking cavity is closed, the cooking appliance continues the cooking steps before opening, thereby saving resources and preventing the fan from blowing out high-temperature air to scald the user, thereby improving safety.

[0097] For ease of understanding, an exemplary embodiment is provided here to illustrate the control method of the above cooking appliance. Assuming that the cooking appliance is an air fryer, before cooking, the user can pull the drawer-type cooking cavity out of the air fryer, put the ingredients into the cooking cavity, and then push the cooking cavity into the air fryer; connect the power supply of the air fryer, press the function button corresponding to the "yogurt fermentation mode", at this time, the air fryer automatically sets the set temperature to 45°C, sets the set time to 25 minutes, and displays the countdown in the form of a stopwatch; the user presses the start button to start the cooking process. First, the first stage is entered. The dry-burning electric heating tube (i.e., the upper heating element) above the cooking cavity, the electric belt (i.e., the middle heating element) in the middle of the cooking cavity, and the infrared heater (i.e., the lower heating element) below the cooking cavity are all heated at their respective rated powers. The fan arranged above the dry-burning electric heating tube rotates at the maximum speed, and the temperature in the cooking cavity rises rapidly. When the temperature detected by the NTC sensor (i.e., the first sensor) (i.e., the top temperature) is greater than 25°C (the difference between the set temperature and the first preset offset temperature of 20°C), and the temperature detected by the thermocouple sensor (i.e., the second sensor) (i.e., the bottom temperature) is greater than 15°C (the difference between the set temperature and the second preset offset temperature of 30°C), the second stage is entered. In the second stage, the power of the dry-burning electric heating tube is adjusted in real time according to the set temperature and the real-time top temperature of the cooking cavity. At the same time, the electric belt and the infrared heater continue to heat at the rated power, and the fan rotates at the maximum speed. When the temperature detected by the NTC sensor is greater than 33°C (the difference between the set temperature and the third preset offset temperature of 12°C), and the temperature detected by the thermocouple sensor is greater than 25°C (the difference between the set temperature and the fourth preset offset temperature of 20°C), the third stage is entered. In the second stage, the dry-burning electric heating tube is turned off, the electric belt is heated at the rated power, the power of the infrared heater is adjusted in real time according to the set temperature and the real-time top temperature of the cooking cavity, and the fan is controlled to rotate at the speed corresponding to the "yogurt fermentation mode" in the third stage. When the temperature detected by the NTC sensor is greater than 41°C (the difference between the set temperature and the fifth preset offset temperature of 4°C), and the temperature detected by the thermocouple sensor is greater than 35°C (the difference between the set temperature and the sixth preset offset temperature of 10°C), the fourth stage is entered. In the fourth stage, both the dry-burning electric heating tube and the infrared heater are turned off, the power of the electric belt is adjusted in real time according to the set temperature and the real-time top temperature of the cooking cavity, and the fan is controlled to rotate at the speed corresponding to the "yogurt fermentation mode" in the fourth stage. During the fourth stage, the temperature gradually decreases, and when the temperature detected by the NTC sensor is less than 41°C and the temperature detected by the thermocouple sensor is less than 35°C, the third stage is repeated. When the countdown ends, the cooking process of this yogurt fermentation ends.

[0098] During the entire cooking process, the air fryer monitors the top and bottom temperatures in the cooking chamber in real time to determine whether the top temperature is greater than 220°C or the bottom temperature is greater than 370°C. Since the temperature in the yogurt fermentation mode is relatively low throughout the process, the probability of triggering the ultra-high temperature protection is low.

[0099] During the cooking process, the user can pull out the drawer-type cooking chamber at any time to check the cooking status. When the cooking chamber is pulled out, the micro switch is triggered, the countdown is paused, and the current power of the dry-burning electric heating tube, electric belt and infrared heater and the current speed of the fan are recorded first, and then the fan, dry-burning electric heating tube, electric belt and infrared heater are turned off. When the user finishes checking and pushes the cooking chamber back, the micro switch is turned off, the countdown continues, and the fan, dry-burning electric heating tube, electric belt and infrared heater are controlled to continue working in the state recorded when the cooking chamber was pulled out.

[0100] See also Figure 7 , Figure 7 The structure diagram of the control device 200 of the cooking device provided in the embodiment of the present application is shown. The control device 200 of the cooking device may include the following components: an instruction response module 210, which is used to respond to the working instruction corresponding to the cooking function, obtain the set temperature and the set time, and start timing to obtain the timing time; a temperature acquisition module 220, which is used to obtain the top temperature and the bottom temperature of the cooking cavity in real time; a first device control module 230, which is used to control the upper heating element, the middle heating element and the lower heating element to work according to the set temperature, the top temperature and the bottom temperature, and heat the cooking cavity; a second device control module 240, which is used to turn off the upper heating element, the middle heating element and the lower heating element when the timing time reaches the set time.

[0101] In some embodiments, the first device control module 230 is also used to control the upper heating element, the middle heating element and the lower heating element to operate at their respective preset powers when the top temperature is less than or equal to the first temperature and the bottom temperature is less than or equal to the second temperature.

[0102] In some embodiments, the first device control module 230 is also used to adjust the power of the upper heating element in real time according to the set temperature and the top temperature when the top temperature is greater than the first temperature and less than or equal to the third temperature, and the bottom temperature is greater than the second temperature and less than or equal to the fourth temperature, control the upper heating element to operate with the adjusted power, and control the middle heating element and the lower heating element to operate with their respective rated powers.

[0103] In some embodiments, the first device control module 230 is also used to calculate in real time the difference between the set temperature and the top temperature; determine the power adjustment amount of the upper heating element corresponding to the difference; and adjust the power of the upper heating element based on the power adjustment amount of the upper heating element.

[0104] In some embodiments, the first device control module 230 is also used to turn off the upper heating element, control the middle heating element to operate with a preset power, adjust the power of the lower heating element according to the set temperature and the top temperature, and control the lower heating element to operate with the adjusted power when the top temperature is greater than the third temperature and less than or equal to the fifth temperature, and the bottom temperature is greater than the fourth temperature and less than or equal to the sixth temperature.

[0105] In some embodiments, the first device control module 230 is also used to calculate in real time the difference between the set temperature and the top temperature; determine the power adjustment amount of the lower heating element corresponding to the difference; and adjust the power of the lower heating element based on the power adjustment amount of the lower heating element.

[0106] In some embodiments, the first device control module 230 is also used to turn off the upper heating element and the lower heating element when the top temperature is greater than the fifth temperature and the bottom temperature is greater than the sixth temperature, adjust the power of the middle heating element in real time according to the set temperature and the top temperature, and control the middle heating element to operate with the adjusted power.

[0107] In some embodiments, the first device control module 230 is further used to calculate in real time the difference between the set temperature and the top temperature; determine the power adjustment amount of the intermediate heating element corresponding to the difference; and adjust the power of the intermediate heating element based on the power adjustment amount of the intermediate heating element.

[0108] In some embodiments, the control device 200 of the cooking device further includes an ultra-high temperature protection module. The ultra-high temperature protection module is used to record the current power of the upper heating element, the middle heating element, and the lower heating element when the top temperature is greater than the first preset threshold or the bottom temperature is greater than the second preset threshold, and control the upper heating element, the middle heating element, and the lower heating element to stop working; when the top temperature is less than the third preset threshold or the bottom temperature is less than the fourth preset threshold, control the upper heating element, the middle heating element, and the lower heating element to continue working with their current power, wherein the third preset threshold is less than the first preset threshold, and the fourth preset threshold is less than the second preset threshold.

[0109] In some embodiments, the control device 200 of the cooking device further includes a cover-opening protection module. The cover-opening protection module is used to record the current power of the upper heating element, the middle heating element, and the lower heating element and turn off the upper heating element, the middle heating element, and the lower heating element in response to the switch corresponding to the cooking cavity being turned on; and to control the upper heating element, the middle heating element, and the lower heating element to continue working with their current power in response to the switch corresponding to the cooking cavity being turned off.

[0110] In some embodiments, the control device 200 of the cooking device further includes a fan control module, which is used to control the fan to work according to the set temperature, the top temperature and the bottom temperature, and to turn off the fan when the timing duration reaches the set duration.

[0111] In some embodiments, the fan control module is further configured to control the fan to rotate at a first preset speed when the top temperature is less than or equal to a third temperature and the bottom temperature is less than or equal to a fourth temperature.

[0112] In some embodiments, the fan control module is further used to adjust the speed of the fan according to the cooking function when the top temperature is greater than the third temperature and the bottom temperature is greater than the fourth temperature, and control the fan to rotate at the adjusted speed.

[0113] In some embodiments, the fan control module is also used to control the fan to rotate at a second preset speed less than or equal to the first preset speed in response to the top temperature being greater than the third temperature and less than or equal to the fifth temperature, and the bottom temperature being greater than the fourth temperature and less than or equal to the sixth temperature under the cooking function.

[0114] In some embodiments, the fan control module is also used to control the fan to rotate at a third preset speed under the cooking function in response to the top temperature being greater than the fifth temperature and the bottom temperature being greater than the sixth temperature, and the third preset speed is less than or equal to the first preset speed.

[0115] In some embodiments, the fan control module is also used to record the current speed of the fan and control the fan to rotate at the first preset speed when the top temperature is greater than the first preset threshold or the bottom temperature is greater than the second preset threshold; and control the fan to rotate at the current speed when the top temperature is less than the third preset threshold or the bottom temperature is less than the fourth preset threshold, wherein the third preset threshold is less than the first preset threshold, and the fourth preset threshold is less than the second preset threshold.

[0116] In some embodiments, the fan control module is further used to record the current speed of the fan and turn off the fan in response to the switch corresponding to the cooking cavity being turned on; in response to the switch corresponding to the cooking cavity being turned off, control the fan to rotate at the current speed.

[0117] Those skilled in the art can clearly understand that the control device of the cooking utensil provided in the embodiment of the present application can implement the control method of the cooking utensil provided in the embodiment of the present application. The specific working process of the above modules can refer to the corresponding process of the control method of the cooking utensil in the embodiment of the present application, which will not be described here.

[0118] In the embodiments provided in the present application, the coupling, direct coupling or communication connection between the modules shown or discussed may be indirect coupling or communication coupling through some interfaces, devices or modules, and may be electrical, mechanical or other forms, and the embodiments of the present application are not limited to this.

[0119] In addition, each functional module in the embodiment of the present application can be integrated into one processing module, or each module can exist physically separately, or two or more modules can be integrated into one module. The above integrated modules can be implemented in the form of hardware or in the form of software functional modules, which is not limited in the embodiment of the present application.

[0120] See also Figure 8 , Figure 8 The schematic diagram of the structure of the cooking device provided by the embodiment of the present application is shown. The cooking device 300 may include the following components: a cooking cavity 310; an upper heating element 320; a middle heating element 330; a lower heating element 340; a memory 350; a processor 360; an application is stored in the memory 370, and the application is configured to execute the method described in the above embodiment when called by the processor 360.

[0121] Among them, the processor 360 may include one or more processing cores. The processor 360 uses various interfaces and lines to connect the various parts of the entire cooking appliance 300, and executes various functions of the electronic device and processes data by running or executing instructions, programs, code sets or instruction sets stored in the memory 350, and calling data stored in the memory 350. The processor 360 can be implemented in at least one hardware form of digital signal processing (Digital Signal Processing, DSP), field programmable gate array (Field Programmable Gate Array, FPGA), and programmable logic array (Programmable Logic Array, PLA). The processor 360 can integrate one or more combinations of a central processing unit (Central Processing Unit, CPU), a graphics processing unit (Graphics Processing Unit, GPU) and a modem. It is understandable that the above-mentioned modem may not be integrated into the processor 360, and can be implemented separately through a communication chip.

[0122] The memory 350 may include a random access memory (RAM) or a read only memory (ROM). The memory 350 may be used to store instructions, programs, codes, code sets or instruction sets. The memory 350 may include a program storage area and a data storage area. The program storage area may store instructions for implementing an operating system, instructions for implementing at least one function, instructions for implementing the above-mentioned various method embodiments, etc. The data storage area may store data created by the cooking appliance 300 during use, etc.

[0123] An embodiment of the present application also provides a computer-readable storage medium, in which a program code is stored. The program code is used to execute the method described in the above method embodiment when called by a processor.

[0124] The computer readable storage medium may be an electronic storage such as a flash memory, an electrically erasable programmable read only memory (EEPROM), an electrically programmable read only memory (EPROM), a hard disk, or a read only memory (ROM). In some embodiments, the computer readable storage medium may include a non-transitory computer-readable storage medium (NTRSM). The computer readable storage medium has a storage space for the program code of any method step in the above method. These program codes can be read from or written to one or more computer program products. The program code can be compressed in an appropriate form.

[0125] The above are only preferred embodiments of the present application, and are not intended to limit the present application in any form. Although the present application has been disclosed as above with preferred embodiments, it is not intended to limit the present application. Any technical personnel in the field can make some changes or modify the technical contents disclosed above into equivalent embodiments without departing from the scope of the technical solution of the present application. However, any brief modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present application without departing from the content of the technical solution of the present application are still within the scope of the technical solution of the present application.

Claims

1. A cooking appliance control method, characterized in that: Applicable to a cooking utensil, the cooking utensil comprises a cooking cavity, an upper heating element, a middle heating element, and a lower heating element; the upper heating element is located above the cooking cavity; The middle heating element is located in the middle of the side of the cooking cavity; The lower heating element is located below the cooking cavity; the method comprises: In response to the working instruction corresponding to the cooking function, the set temperature and the set duration are obtained, the timing is started, and the timing duration is obtained; Acquiring the top temperature and the bottom temperature of the cooking cavity in real time; According to the set temperature, the top temperature and the bottom temperature, the upper heating element, the middle heating element and the lower heating element are controlled to operate to heat the cooking cavity; When the timing duration reaches the set duration, the upper heating element, the middle heating element and the lower heating element are turned off.

2. The method according to claim 1, characterized in that The step of controlling the upper heating element, the middle heating element and the lower heating element to work according to the set temperature, the top temperature and the bottom temperature comprises: When the top temperature is less than or equal to the first temperature and the bottom temperature is less than or equal to the second temperature, the upper heating element, the middle heating element and the lower heating element are controlled to operate with their respective preset powers.

3. The method according to claim 2, characterized in that The step of controlling the upper heating element, the middle heating element and the lower heating element to work according to the set temperature, the top temperature and the bottom temperature also includes: When the top temperature is greater than the first temperature and less than or equal to the third temperature, and the bottom temperature is greater than the second temperature and less than or equal to the fourth temperature, the power of the upper heating element is adjusted in real time according to the set temperature and the top temperature, the upper heating element is controlled to work with the adjusted power, and the middle heating element and the lower heating element are controlled to keep working with their respective preset powers.

4. The method according to claim 3, characterized in that The step of adjusting the power of the upper heating element in real time according to the set temperature and the top temperature comprises: Calculating the difference between the set temperature and the top temperature in real time; determining a power adjustment amount of the upper heating element corresponding to the difference; The power of the upper heating element is adjusted based on the power adjustment amount of the upper heating element.

5. The method according to claim 3, characterized in that: The step of controlling the upper heating element, the middle heating element and the lower heating element to work according to the set temperature, the top temperature and the bottom temperature also includes: When the top temperature is greater than the third temperature and less than or equal to the fifth temperature, and the bottom temperature is greater than the fourth temperature and less than or equal to the sixth temperature, the upper heating element is turned off, the middle heating element is controlled to work with its own preset power, the power of the lower heating element is adjusted according to the set temperature and the top temperature, and the lower heating element is controlled to work with the adjusted power.

6. The method according to claim 5, characterized in that The step of adjusting the power of the lower heating element according to the set temperature and the top temperature comprises: Calculating the difference between the set temperature and the top temperature in real time; determining a power adjustment amount of the lower heating element corresponding to the difference; The power of the lower heating element is adjusted based on the power adjustment amount of the lower heating element.

7. The method according to claim 5, characterized in that The step of controlling the upper heating element, the middle heating element and the lower heating element to work according to the set temperature, the top temperature and the bottom temperature also includes: When the top temperature is greater than the fifth temperature and the bottom temperature is greater than the sixth temperature, the upper heating element and the lower heating element are turned off, the power of the middle heating element is adjusted in real time according to the set temperature and the top temperature, and the middle heating element is controlled to work with the adjusted power.

8. The method according to claim 7, characterized in that The step of adjusting the power of the intermediate heating element in real time according to the set temperature and the top temperature comprises: Calculating the difference between the set temperature and the top temperature in real time; determining a power adjustment amount of the intermediate heating element corresponding to the difference; The power of the intermediate heating element is adjusted based on the power adjustment amount of the intermediate heating element.

9. The method according to any one of claims 1 to 8, characterized in that: Before the step of turning off the upper heating element, the middle heating element and the lower heating element when the timing duration reaches the set duration, the method further comprises: When the top temperature is greater than a first preset threshold or the bottom temperature is greater than a second preset threshold, recording the current power of each of the upper heating element, the middle heating element, and the lower heating element, and controlling the upper heating element, the middle heating element, and the lower heating element to stop working; When the top temperature is less than the third preset threshold or the bottom temperature is less than the fourth preset threshold, the upper heating element, the middle heating element, and the lower heating element are controlled to continue working using their respective current powers, wherein the third preset threshold is less than the first preset threshold, and the fourth preset threshold is less than the second preset threshold.

10. The method according to any one of claims 1 to 8, characterized in that: Before the step of turning off the upper heating element, the middle heating element and the lower heating element when the timing duration reaches the set duration, the method further comprises: In response to the switch corresponding to the cooking cavity being turned on, recording the current power of each of the upper heating element, the middle heating element and the lower heating element, and turning off the upper heating element, the middle heating element and the lower heating element; In response to the switch corresponding to the cooking cavity being turned off, the upper heating element, the middle heating element and the lower heating element are controlled to continue to work using their respective current powers.

11. The method according to any one of claims 5 to 8, characterized in that: The cooking appliance further comprises a fan, and the method further comprises: Controlling the fan to work according to the set temperature, the top temperature and the bottom temperature; When the timing duration reaches the set duration, the fan is turned off.

12. The method according to claim 11, characterized in that The step of controlling the fan to operate according to the set temperature, the top temperature and the bottom temperature comprises: When the top temperature is less than or equal to the third temperature and the bottom temperature is less than or equal to the fourth temperature, the fan is controlled to rotate at a first preset speed.

13. The method according to claim 12, characterized in that The step of controlling the fan to work according to the set temperature, the top temperature and the bottom temperature also includes: When the top temperature is greater than the third temperature and the bottom temperature is greater than the fourth temperature, the rotation speed of the fan is adjusted according to the cooking function, and the fan is controlled to rotate at the adjusted rotation speed.

14. The method according to claim 13, characterized in that The step of adjusting the speed of the fan according to the cooking function and controlling the fan to rotate at the adjusted speed comprises: Under the cooking function, in response to the top temperature being greater than the third temperature and less than or equal to the fifth temperature, and the bottom temperature being greater than the fourth temperature and less than or equal to the sixth temperature, the fan is controlled to rotate at a second preset speed, and the second preset speed is less than or equal to the first preset speed.

15. The method according to claim 13, characterized in that The step of adjusting the speed of the fan according to the cooking function and controlling the fan to rotate at the adjusted speed also includes: In the cooking function, in response to the top temperature being greater than the fifth temperature and the bottom temperature being greater than the sixth temperature, the fan is controlled to rotate at a third preset speed, which is less than or equal to the first preset speed.

16. The method according to claim 11, characterized in that Before the step of shutting down the fan when the timing duration reaches the set duration, the method further includes: When the top temperature is greater than a first preset threshold or the bottom temperature is greater than a second preset threshold, recording the current speed of the fan, and controlling the fan to rotate at a first preset speed; When the top temperature is less than a third preset threshold or the bottom temperature is less than a fourth preset threshold, the fan is controlled to rotate at the current speed, wherein the third preset threshold is less than the first preset threshold, and the fourth preset threshold is less than the second preset threshold.

17. The method according to claim 11, characterized in that Before the step of shutting down the fan when the timing duration reaches the set duration, the method further includes: In response to the switch corresponding to the cooking cavity being turned on, recording the current speed of the fan and turning off the fan; In response to the switch corresponding to the cooking cavity being turned off, the fan is controlled to rotate at the current speed.

18. The method according to claim 1, characterized in that The preset powers of the upper heating element, the lower heating element and the middle heating element are respectively reduced in sequence.

19. A control device for a cooking appliance, characterized in that: Applicable to a cooking utensil, the cooking utensil comprises a cooking cavity, an upper heating element, a middle heating element, and a lower heating element; the upper heating element is located above the cooking cavity; The middle heating element is located in the middle of the side of the cooking cavity; The lower heating element is located below the cooking cavity; the device comprises: The instruction response module is used to respond to the work instruction corresponding to the cooking function, obtain the set temperature and set time, start timing, and obtain the timing time; A temperature acquisition module, used for acquiring the top temperature and the bottom temperature of the cooking cavity in real time; A first device control module, for controlling the upper heating element, the middle heating element and the lower heating element to operate according to the set temperature, the top temperature and the bottom temperature, so as to heat the cooking cavity; The second device control module is used to turn off the upper heating element, the middle heating element and the lower heating element when the timing time reaches the set time.

20. A cooking utensil, characterized in that: include: Cooking chamber; an upper heating element, located above the cooking cavity; A middle heating element, located in the middle of the side of the cooking cavity; a lower heating element, located below the cooking cavity; A memory and a processor, wherein an application is stored in the memory, and the application is configured to, when called by the processor, enable the cooking appliance to execute the method according to any one of claims 1 to 18.

21. A computer-readable storage medium, characterized in that: The computer-readable storage medium stores program code, and the program code is configured to execute the method according to any one of claims 1 to 18 when called by a processor.

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