Heat preservation method and device, air fryer and computer readable storage medium

Abstract

The embodiment of the invention provides a heat preservation method and device, an air fryer and a computer readable storage medium, and relates to the technical field of air fryers. The method comprises the following steps: turning off a heating element in response to the completion of cooking of the air fryer, and controlling a fan to rotate at a first rotating speed; acquiring the real-time temperature in the cooking cavity; when the real-time temperature is lower than the preset heat preservation temperature, the heating piece and the fan are controlled to work according to the real-time temperature, heat preservation is conducted on food in the cooking cavity, and therefore the food after cooking can be kept at the proper practical temperature for a long time, the taste of the cooked food is kept, and the user can conveniently eat the food at any time. The food is still in a warm state, so that the cooking performance of the air fryer is improved.

Description

Technical Field

[0001] The present application relates to the technical field of air fryers, and more specifically, to a heat preservation method and device, an air fryer, and a computer-readable storage medium. Background Art

[0002] At present, air fryers such as air fryers usually stop working after cooking. If the user forgets to take out the food immediately, the temperature of the cooked food will slowly drop. If the user does not take out the food for a long time, the cooked food will cool down over time, resulting in a worse taste, thus affecting the user experience. Summary of the invention

[0003] The embodiments of the present application provide a heat preservation method and device, an air fryer, and a computer-readable storage medium to solve the problem that current air fryers, for example, do not keep food warm after cooking, causing the food to cool down and the taste to deteriorate.

[0004] In a first aspect, an embodiment of the present application provides a heat preservation method, which is applied to an air fryer, wherein the air fryer includes a cooking cavity, a heating element, and a fan. The method includes: in response to the end of cooking in the air fryer, turning off the heating element, controlling the fan to rotate at a first speed; obtaining the real-time temperature in the cooking cavity; when the real-time temperature is lower than a preset heat preservation temperature, controlling the heating element and the fan to work according to the real-time temperature to keep the food in the cooking cavity warm.

[0005] In a second aspect, an embodiment of the present application provides a heat preservation device, which is applied to an air fryer, wherein the air fryer includes a cooking cavity, a heating element, and a fan. The device includes: a response module, which is used to respond to the end of cooking in the air fryer, turn off the heating element, and control the fan to rotate at a first speed; an acquisition module, which is used to acquire the real-time temperature in the cooking cavity; and a heat preservation module, which is used to control the heating element and the fan to work according to the real-time temperature when the real-time temperature is lower than a preset heat preservation temperature, so as to keep the food in the cooking cavity warm.

[0006] In a third aspect, an embodiment of the present application provides an air fryer, which includes: a cooking chamber, a heating element, a fan, a memory and a processor, wherein an application is stored in the memory, and the application is used to enable the air fryer to execute the method provided in the embodiment of the present application when called by the processor.

[0007] In a fourth aspect, an embodiment of the present application provides a computer-readable storage medium having a program code stored thereon, wherein the program code is used to enable the processor to execute the method provided by the embodiment of the present application when called by the processor.

[0008] The heat preservation method and device, air fryer, and computer-readable storage medium provided in the embodiments of the present application can, in response to the end of cooking in the air fryer, turn off the heating element, control the fan to rotate at a first speed, obtain the real-time temperature in the cooking cavity, and when the real-time temperature is lower than the preset heat preservation temperature, control the heating element and the fan to work according to the real-time temperature to keep the food in the cooking cavity warm, so that the food can maintain a suitable practical temperature for a long time after cooking, and maintain the taste of the cooked food, so that the user can eat the food at any time while the food is still in a warm state, thereby improving the cooking performance of the air fryer. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following is a brief introduction to the drawings required for the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present application, not all embodiments. Based on the embodiments of the present application, all other embodiments and drawings obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0010] Figure 1 A schematic diagram of the structure of an air fryer provided in one embodiment of the present application is shown;

[0011] Figure 2 A schematic structural diagram of an air fryer provided by an exemplary embodiment of the present application is shown;

[0012] Figure 3 A schematic structural diagram of an air fryer provided by another exemplary embodiment of the present application is shown;

[0013] Figure 4 A schematic structural diagram of a heat preservation circuit for implementing a heat preservation method provided by an exemplary embodiment of the present application is shown;

[0014] Figure 5 A schematic diagram of a heat preservation method according to an embodiment of the present application is shown;

[0015] Figure 6 A schematic flow chart of a heat preservation method provided in another embodiment of the present application is shown;

[0016] Figure 7 A schematic flow chart of a heat preservation method provided by an exemplary embodiment of the present application is shown;

[0017] Figure 8 A schematic structural diagram of a heat preservation device provided in an embodiment of the present application is shown;

[0018] Fig. 9 A structural schematic diagram of an air fryer provided in another embodiment of the present application is shown. DETAILED DESCRIPTION

[0019] In order to enable those skilled in the art to better understand the solution of the present application, the technical solution 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.

[0020] See also Figure 1 , Figure 1 The schematic diagram of the structure of an air fryer provided by an embodiment of the present application is shown. The air fryer 100 includes a cooking cavity 110, a heating element 120 and a fan 130. The cooking cavity 110 is used to place food for cooking. The heating element 120 is used to generate heat to heat the cooking cavity 110. The fan 130 includes a motor and a fan blade. The rotation of the motor drives the fan blade to rotate. The fan 130 is used to blow the heat generated by the heating element 120 to the cooking cavity 110 to make the temperature in the cooking cavity 110 uniform and avoid the heat from overflowing the cooking cavity 110 as much as possible. The air fryer 100 can be an air fryer or other equipment with cooking function.

[0021] For some examples, see Figure 2 The heating element 120 may be one, and the heating element 120 may be arranged above the cooking cavity 110. The fan 130 is arranged above the heating element 120 and toward the heating element 120 to blow the heat generated by the heating element 120 into the cooking cavity 110 to make the temperature in the cooking cavity 110 uniform while avoiding the heat overflow in the cooking cavity 110 as much as possible. In this embodiment, the first heating element 130 may be an annular dry-burning tube.

[0022] For some examples, see Figure 3 , the heating element 120 may include two heating elements, a first heating element 121 and a second heating element 122. The first heating element 121 is arranged above the cooking cavity 110, and the second heating element 122 is arranged below the cooking cavity 110. The fan 130 is arranged above the first heating element 121 and faces the fan 130 to blow the heat generated by the first heating element 121 and the second heating element 122 into the cooking cavity 110 to make the temperature in the cooking cavity 110 uniform. In this embodiment, the first heating element 121 may be an annular dry-burning tube, and the second heating element 122 may be an annular dry-burning tube or an annular infrared disk. Compared with the annular dry-burning tube, the annular infrared disk does not need to be preheated and can shorten the heating time. In order to reduce the cooking time, the second heating element 122 may be an annular infrared disk.

[0023] The air fryer 100 further includes a temperature sensor, which can be disposed above the cooking cavity 110 and on one side of the heating element above the cooking cavity 110. The temperature sensor is used to detect the temperature in the cooking cavity 110. The temperature sensor can be a negative temperature coefficient (NTC) sensor or a thermocouple sensor. Since thermocouple sensors are more expensive than NTC sensors, are easily interfered with, and the detection accuracy is affected by the ground wiring, NTC sensors are usually used as temperature sensors, and NTC temperature sensors have higher temperature sensing accuracy.

[0024] For example, taking the heating element 120 as an example, the air fryer 100 can be used as follows: Figure 4 The control circuit shown implements the heat preservation method in the embodiment of the present application. Wherein, Heat represents the interface for connecting the heating element 120. ACN represents the interface for alternating current. GND represents the ground interface. SCR172 represents the switch for controlling the opening or closing of the heating element 120. The switch SCR172 can use a suitable thyristor, relay, or metal-oxide-semiconductor field-effect transistor (Metal-Oxide-Semiconductor Field-EffectTransistor, referred to as MOSFET, usually referred to as MOS tube) to control the opening and closing of the heating element 120. PWM represents a single-chip microcomputer, and the switch SCR172 is connected to the input and output ports of the single-chip microcomputer PWM. Square waves of different frequencies are output through the input and output ports of the single-chip microcomputer PWM, and the heating element 120 can be adjusted to use different powers for heating. Resistor R2717 plays an anti-interference role. Resistor R278 represents a current limiting resistor for driving current, which is used to avoid excessive current in the circuit and plays a role in protecting the circuit. Resistor R283 represents a current limiting resistor for driving current, which is used to avoid excessive current in the circuit and plays a role in protecting the circuit and anti-interference. Resistor R164 represents a pull-down resistor, which is used to release the current in the circuit to the ground, and plays a role in voltage division and anti-interference. Points B, C, and E represent the three pin ports of the transistor.

[0025] See also Figure 5 , Figure 5 The schematic diagram of the process of the heat preservation method provided by an embodiment of the present application is shown. The heat preservation method can be applied to an air fryer or a heat preservation device. The heat preservation method can include the following steps S110 to S130.

[0026] Step S110, in response to the completion of cooking in the air fryer, the heating element is turned off and the fan is controlled to rotate at a first speed.

[0027] The air fryer has multiple cooking functions, for example, an air frying function and a baking function. Each cooking function corresponds to a cooking start instruction, a set cooking time, and a set temperature. In some embodiments, each cooking function may correspond to a button, and each cooking function corresponds to a set cooking time. When the user presses a button for starting a cooking function, the control device corresponding to the button for starting the cooking function will generate a cooking start instruction for the cooking function. In other embodiments, the air fryer has a voice recognition function, and each cooking function may correspond to at least one keyword for the cooking function. If the air fryer recognizes that the user says at least one keyword for a cooking function, a cooking start instruction for the cooking function may be generated.

[0028] In response to the cooking start instruction, the air fryer can obtain the set cooking time corresponding to the cooking start instruction, start timing and obtain the actual cooking time, start the cooking function corresponding to the cooking start instruction, and cook the food in the cooking cavity, wherein the actual cooking time refers to the total time from the start of the smoking cooking to the current time. When the actual cooking time reaches the specified cooking time, the air fryer ends cooking, at which time the heating element can be turned off and the fan can be controlled to rotate at the first speed. The cooking start instruction refers to an instruction for starting a cooking function.

[0029] The fan has three speed levels: high, medium and low. The first speed can be a high speed, i.e., a maximum speed. When the air fryer just finishes cooking, the temperature inside the air fryer (e.g., 200 degrees Celsius) is relatively high, and since the cooking chamber is in a closed state, the heat dissipation is relatively slow. At this time, the fan is controlled to rotate at a high speed to perform ultra-high temperature (temp1, e.g., above 200 degrees Celsius) protection treatment, which can speed up the heat dissipation of the air fryer so that the temperature inside the cooking chamber will not be too high when the user opens the air fryer, ensuring the safety of the air fryer. At the same time, the heat inside the cooking chamber can be blown to every place inside the cooking chamber to even out the temperature inside the cooking chamber, thus playing a role of heat preservation.

[0030] For example, the speed range of the high gear is above 2500 revolutions per minute (rmp / min), that is, the speed of the high gear can be a speed greater than or equal to 2500 revolutions per minute (rmp / min) and lower than the rated power of the fan; the speed range of the middle gear is 1500-2500rmp / min, that is, the speed of the middle gear can be a speed less than 2500rmp / min and greater than 1500rmp / min; the speed range of the low gear is below 1500rmp / min, that is, the speed of the low gear can be a speed less than or equal to 1500rmp / min. It should be noted that in actual applications, in order to flexibly control the speed of the fan, the speed gear of the fan can be further refined into more gears, which still falls within the scope of protection of this application.

[0031] Step S120, obtaining the real-time temperature in the cooking cavity.

[0032] The real-time temperature (NTC temperature) in the cooking cavity can be obtained in real time through a temperature sensor (such as an NTC sensor) in the air fryer.

[0033] Step S130, when the real-time temperature is lower than the preset insulation temperature, the heating element and the fan are controlled to work according to the real-time temperature to keep the food in the cooking cavity warm.

[0034] In the embodiment of the present application, the preset insulation temperature may be a pre-set critical temperature for starting the insulation function. For example, the preset insulation temperature may be 70 degrees Celsius.

[0035] When the real-time temperature is lower than the preset insulation temperature, the food in the cooking cavity is still in a warm state. If the temperature in the cooking cavity is further reduced, the food may slowly cool down. In order to maintain the taste of the food and keep the food warm, the heating element can be controlled to work at the first power, and the fan can be controlled to rotate at the first speed. In the embodiment of the present application, the heating element has 1st power, 2nd power, 3rd power and 4th power, wherein the 1st power, 2nd power, 3rd power and 4th power increase in sequence. The first power in the embodiment of the present application can be 2nd power. Since the 2nd power is larger than the 1st power and smaller than the 3rd and 4th power, when the real-time temperature is lower than the preset insulation temperature, the heating element uses the 2nd power for heating, which can be quickly heated to avoid the food in the cooking cavity from cooling down, and can avoid the use of excessive power heating to cause the food to be cooked again, so that the taste of the food can be effectively maintained. It should be noted that in actual applications, in order to flexibly control the power of the heating element, the power gear of the heating element can also be refined into more gears, which still belongs to the scope of protection of this application.

[0036] Since there is always unavoidable heat loss during the cooking process, the embodiment of the present application pre-sets three temperature offset values, namely, a first preset temperature offset value (move1), a second preset temperature offset value (move2), and a third preset temperature offset value (move3), which are used to represent the part of the heat lost in different cooking stages. By subtracting the offset temperature, the influence of heat loss in different cooking stages on temperature control is reduced. Among them, the first preset temperature offset value is greater than the third preset temperature offset value, and the third preset temperature offset value is greater than the second preset temperature offset value. The values ​​of the three temperature offset values ​​can be determined according to the type of the temperature sensor of the air fryer. Taking the temperature sensor as an NTC sensor as an example, the value range of the first preset temperature offset value can be above 10 degrees Celsius, that is, the first preset temperature offset value can be a value greater than or equal to 10 degrees Celsius; the value range of the second preset temperature offset value can be above 1 degree Celsius and below 10 degrees Celsius, that is, the second preset temperature offset value can be a value greater than or equal to 1 degree Celsius and less than 2 degrees Celsius. The value range of the third preset temperature offset value may be greater than 2 degrees Celsius and less than 10 degrees Celsius, that is, the third preset temperature offset value may be a value greater than or equal to 2 degrees Celsius and less than 10 degrees Celsius and greater than the second preset temperature offset value.

[0037] In an embodiment of the present application, the set temperature of the air fryer for this cooking can be obtained in response to the end of the air fryer, or the set temperature corresponding to the cooking start instruction can be obtained in response to the above-mentioned cooking start instruction. The difference between the set temperature and the first preset temperature offset value is calculated to obtain the first temperature. The difference between the set temperature and the second preset temperature offset value is calculated to obtain the second temperature. The difference between the set temperature and the third preset temperature offset value is calculated to obtain the third temperature. Since the first preset temperature offset value is greater than the third preset temperature offset value, and the third preset temperature offset value is greater than the second preset temperature offset value, the first temperature is less than the third temperature, and the third temperature is less than the second temperature. In an embodiment of the present application, the first temperature is greater than the above-mentioned preset insulation temperature.

[0038] After the first temperature, the second temperature and the third temperature are calculated, the heating element and the fan can be controlled to work according to the real-time temperature, the first temperature, the second temperature and the third temperature to keep the food in the cooking cavity warm.

[0039] Specifically, after the heating element operates at the first power and the fan rotates at the first speed, if the real-time temperature is greater than the first temperature, the temperature in the cooking cavity is high enough to keep the food warm. At this time, the heating element can be controlled to operate at the second power, so that the heating element generates heat at a low power and slowly heats the cooking cavity to keep the food warm. At the same time, the fan can be controlled to rotate at the second speed, so that the fan rotates at a low speed, so that the heat generated by the heating element can be slowly blown to every place in the cooking cavity to keep the food warm. The second power is less than the first power, and for example, the second power can be the first gear power mentioned above. The second speed is less than the first speed, and for example, the second speed can be the low speed mentioned above.

[0040] After the heating element operates at the second power and the fan rotates at the second speed, if the real-time temperature is greater than the second temperature, the temperature in the cooking cavity is relatively high at this time. If the heating element continues to heat up, the temperature in the cooking cavity will be too high. On the one hand, if the temperature is too high, there is a safety hazard if the user turns on the air fryer. On the other hand, too high a temperature may cause secondary cooking of the food, thereby affecting the taste of the food. Therefore, the heating element can be turned off at this time, and the fan can be controlled to rotate at the second speed. The heat in the cooking cavity can be slowly blown to every place in the cooking cavity to even out the temperature in the cooking cavity and play a role of heat preservation.

[0041] After the heating element is turned off and the fan rotates at the second speed, if the real-time temperature is lower than the third temperature, the temperature in the cooking cavity is relatively low. If the temperature continues to drop, the food may get cold. To prevent the food from getting cold, the heating element can be controlled to work at the second power, so that the heating element generates heat at a low power, and the cooking cavity is slowly heated to keep the food warm. At the same time, the fan can be controlled to continue to rotate at the second speed, so that the fan rotates at a low speed, so that the heat generated by the heating element can be slowly blown to every place in the cooking cavity to keep the food warm.

[0042] The insulation method provided in the embodiment of the present application can respond to the end of cooking in the air fryer by turning off the heating element, controlling the fan to rotate at a first speed, obtaining the real-time temperature in the cooking cavity, and when the real-time temperature is lower than the preset insulation temperature, controlling the heating element and the fan to work according to the real-time temperature to keep the food in the cooking cavity warm, so that the food after cooking can maintain a suitable practical temperature for a long time, and maintain the taste of the cooked food, so that the user can eat the food at any time, and the food is still in a warm state, thereby improving the cooking performance of the air fryer.

[0043] See also Figure 6 , Figure 6A schematic flow chart of a heat preservation method provided by another embodiment of the present application is shown. The heat preservation method can be applied to a heat preservation device or an air fryer. The heat preservation method can include the following steps S210 to S250.

[0044] Step S210, in response to the completion of cooking in the air fryer, start timing and obtain the timing duration, turn off the heating element, and control the fan to rotate at a first speed.

[0045] The timing duration refers to the total time from the end of cooking to the present.

[0046] Step S220, obtaining the real-time temperature in the cooking cavity.

[0047] For detailed description of step S210 and step S220, please refer to the relevant parts above.

[0048] Step S230, when the real-time temperature is lower than the preset high temperature protection release temperature, the fan is controlled to rotate at a second speed which is lower than the first speed, wherein the high temperature protection release temperature is higher than the preset insulation temperature.

[0049] The high temperature protection release temperature may be a pre-set critical temperature for releasing the high temperature protection function. For example, the high temperature protection release temperature may be 150 degrees Celsius or 105 degrees Celsius. In order to reduce the high temperature at the end of cooking to ensure the safety of the air fryer, the fan rotates at a first speed (a high speed) in step S210. When the real-time temperature is lower than the high temperature protection release temperature, the temperature in the cooking cavity has been much lower than the high temperature. At this time, if the user turns on the air fryer, the temperature will not be too high, and the safety hazard is low. At this time, the fan can be controlled to rotate at a second speed to slowly and evenly blow the heat in the cooking cavity to every place in the cooking cavity to keep the food warm.

[0050] When the real-time temperature is between the high temperature protection release temperature and the preset keep warm temperature, the heat in the cooking chamber can still keep the food warm, so there is no need to turn on the heating element for heating at this stage.

[0051] Step S240, when the real-time temperature is lower than the preset keeping-warm temperature, the heating element and the fan are controlled to work according to the real-time temperature to keep the food in the cooking cavity warm. For a detailed description of step S240, please refer to the relevant part above.

[0052] Step S250, when the timing time reaches the preset insulation time, the fan and the heating element are turned off, and the air fryer is controlled to standby mode.

[0053] The preset keep warm time is a critical time preset for releasing the keep warm function. For example, the preset keep warm time can be 24 hours. When the timing time reaches the preset keep warm time, the keep warm time has been quite long, and the user may not want to eat the food in the cooking chamber anymore. If the keep warm time is continued, it will not make much sense. In addition, the fan and the heating element will consume a certain amount of energy if the keep warm time is too long. At this time, the fan and the heating element can be turned off, and the air fryer can be controlled to be in standby mode, waiting for the user's operation.

[0054] In some embodiments, when the timing reaches the preset insulation time, the air fryer can also emit a reminder sound to remind the user that there is still food in the cooking chamber, and wait for the user to perform relevant operations on the air fryer, such as turning off the air fryer, so as to save energy as much as possible and prevent the air fryer from working for too long, which will affect the service life of the air fryer.

[0055] In addition to having Figure 5 The heat preservation method provided in this embodiment also has the following additional technical effects: when the real-time temperature is lower than the high temperature protection release temperature, the fan is controlled to rotate at a second speed, so that the heat in the cooking cavity can be slowly and evenly blown to every place in the cooking cavity to keep the food warm. When the timing reaches the preset heat preservation time, the fan and the heating element are turned off, which can save energy and avoid meaningless heat preservation operations for too long. When the timing reaches the preset heat preservation time, the user can be reminded that there is still food in the cooking cavity, so that the user can perform relevant operations on the air fryer, such as turning off the air fryer, thereby saving energy as much as possible and preventing the air fryer from working for too long, which affects the service life of the air fryer.

[0056] For ease of understanding, an example is provided here to illustrate the heat preservation method provided by the embodiment of the present application. Figure 7, the air fryer enters the low-power insulation process after normal cooking. The indicator light corresponding to the insulation function lights up, starts timing or obtains the timing duration, and detects the real-time temperature (NTC temperature) in the cooking chamber in real time. Control the fan to rotate at full speed to perform ultra-high temperature protection processing, and judge whether the real-time temperature is less than the preset high temperature protection release temperature T1. If the real-time temperature is not less than the preset high temperature protection release temperature T1, continue to perform ultra-high temperature protection processing until the real-time temperature is less than the preset high temperature protection release temperature T1. At this time, the heating element can be controlled to work at 2 gears of power, and the fan can be controlled to rotate at a speed of medium gear (or high gear), and judge whether the real-time temperature is greater than the first temperature. If the real-time temperature is not greater than the first temperature, continue to control the heating element to work at 2 gears of power, and control the fan to rotate at a speed of medium gear (or high gear). If the real-time temperature is greater than the first temperature, control the heating element to work at 1 gear of power, control the fan to rotate at a speed of low gear (or medium gear), and judge whether the real-time temperature is greater than the second temperature. If the real-time temperature is not greater than the second temperature, the heating element continues to be controlled to work at the first gear power, and the fan is controlled to rotate at a low gear (or medium gear) speed. If the real-time temperature is greater than the second temperature, the heating element is turned off, the fan is controlled to rotate at a low gear speed, and it is determined whether the real-time temperature is less than the third temperature. If the real-time temperature is not less than the third temperature, the fan continues to be controlled to rotate at a low gear speed. If the real-time temperature is less than the third temperature, the steps of "controlling the heating element to work at the first gear power, controlling the fan to rotate at a low gear (or medium gear) speed, and determining whether the real-time temperature is greater than the second temperature" are repeated until the timing reaches the preset insulation time, the fan and the heating element are turned off, and the air fryer is controlled to standby. In the above entire insulation process, there is an operation of determining whether the timing reaches the preset insulation time to control the insulation time.

[0057] See also Figure 8 , Figure 8 The schematic diagram of the structure of the heat preservation device provided in the embodiment of the present application is shown. The heat preservation device 200 can be applied to an air fryer. The heat preservation device 200 includes a response module 210, an acquisition module 220 and a heat preservation module 230. The response module 210 is used to respond to the end of cooking in the air fryer, turn off the heating element, and control the fan to rotate at a first speed; the acquisition module 220 is used to obtain the real-time temperature in the cooking cavity. The heat preservation module 230 is used to control the heating element and the fan to work according to the real-time temperature when the real-time temperature is lower than the preset heat preservation temperature, so as to keep the food in the cooking cavity warm.

[0058] In some embodiments, the heat preservation module 230 is further used to control the heating element to operate at the first power; and control the fan to rotate at the first speed.

[0059] In some embodiments, the insulation module 230 is also used to control the heating element to operate at a second power and the fan to rotate at a second speed after the heating element operates at a first power and the fan rotates at the first speed, if the real-time temperature is greater than the first temperature, wherein the first temperature is greater than the preset insulation temperature, the second power is less than the first power, and the second speed is less than the first speed.

[0060] In some embodiments, the insulation module 230 is also used to turn off the heating element and control the fan to rotate at the second speed after the heating element operates at a second power and the fan rotates at a second speed, if the real-time temperature is greater than the second temperature, wherein the second temperature is greater than the first temperature.

[0061] In some embodiments, the insulation module 230 is also used to control the heating element to operate at the second power and the fan to rotate at the second speed after the heating element is turned off and the fan rotates at the second speed, if the real-time temperature is lower than a third temperature, wherein the third temperature is lower than the second temperature and higher than the first temperature.

[0062] In some embodiments, the insulation module 230 is also used to control the fan to rotate at a second speed when the real-time temperature is lower than a preset high temperature protection release temperature, and the second speed is lower than the first speed, wherein the high temperature protection release temperature is higher than the preset insulation temperature.

[0063] In some embodiments, the response module 210 is further configured to start timing and obtain the timing duration in response to the air fryer cooking being finished. When the timing duration reaches a preset heat preservation duration, the fan and the heating element are turned off, and the air fryer is controlled to enter a standby state.

[0064] In some embodiments, the insulation module 230 is also used to obtain the set temperature of the air fryer for this cooking; calculate the difference between the set temperature and the first preset temperature offset value to obtain the first temperature; calculate the difference between the set temperature and the second preset temperature offset value to obtain the second temperature, wherein the second preset temperature offset value is less than the first preset temperature offset value; calculate the difference between the set temperature and the third preset temperature offset value to obtain the third temperature, wherein the third preset temperature offset value is greater than the second preset temperature offset value and less than the first preset temperature offset value.

[0065] Those skilled in the art can clearly understand that the heat preservation device provided in the embodiment of the present application can implement the heat preservation method provided in the embodiment of the present application. The specific working process of the above-described device and module can refer to the corresponding process of the method in the embodiment of the present application, which will not be repeated here.

[0066] 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 do not impose specific limitations on this.

[0067] 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.

[0068] See also Fig. 9 , Fig. 9 The structural schematic diagram of an air fryer provided by another embodiment of the present application is shown. The air fryer 300 may include a cooking cavity 310, a heating element 320, a fan 330, a memory 340 and a processor 350, wherein an application is stored in the memory 340, and the application is configured to execute the method provided by the embodiment of the present application when called by the processor 350. The air fryer 300 may be an air fryer, the air fryer 300 may be the same as the above-mentioned air fryer 100, the cooking cavity 310 may be the same as the above-mentioned cooking cavity 110, the heating element 320 may be the same as the above-mentioned heating element 310, and the fan 330 may be the same as the above-mentioned fan 130.

[0069] The processor 350 may include one or more processing cores. The processor 350 uses various interfaces and lines to connect various parts of the entire air fryer 300, and is used to run or execute instructions, programs, code sets or instruction sets stored in the memory 340, and call to run or execute data stored in the memory 340, perform various functions of the air fryer 300 and process data.

[0070] The processor 350 can be implemented in at least one of the hardware forms of digital signal processing (DSP), field programmable gate array (FPGA), and programmable logic array (PLA). The processor 350 can integrate one or a combination of a central processing unit (CPU), a graphics processing unit (GPU), and a modem. Among them, the CPU mainly processes the operating system, user interface, and application programs; the GPU is responsible for rendering and drawing display content; and the modem is used to process wireless communications. It is understandable that the above-mentioned modem may not be integrated into the processor 350, but may be implemented separately through a communication chip.

[0071] The memory 340 may include a random access memory (RAM) or a read-only memory (ROM). The memory 340 may be used to store instructions, programs, codes, code sets or instruction sets. The memory 340 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 air fryer 300 during use, etc.

[0072] The present application embodiment also provides a computer readable storage medium, on which a program code is stored, and the program code is configured to execute the method provided by the present application embodiment when called by the processor. The computer readable storage medium can be an electronic storage such as a flash memory, an electrically erasable and editable read-only memory (Electrically-ErasableProgrammable Read-Only Memory, referred to as EEPROM), an erasable and editable read-only memory (ErasableProgrammable Read-Only Memory, referred to as EPROM), a hard disk or a ROM. In some embodiments, the computer readable storage medium includes a non-volatile computer readable medium (Non-Transitory Computer-Readable Storage Medium, referred to as Non-TCRSM). 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 one or more computer program products or written into one or more computer program products. The program code can be compressed in an appropriate form.

[0073] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit it. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present application.

Claims

1. A heat preservation method, characterized in that: Applied to an air fryer, the air fryer comprises a cooking cavity, a heating element and a fan, and the method comprises: In response to the air fryer finishing cooking, turning off the heating element, and controlling the fan to rotate at a first speed; Obtaining the real-time temperature in the cooking cavity; When the real-time temperature is lower than the preset keeping-warm temperature, the heating element and the fan are controlled to work according to the real-time temperature to keep the food in the cooking cavity warm.

2. The method according to claim 1, characterized in that The step of controlling the heating element and the fan to operate according to the real-time temperature comprises: Controlling the heating element to operate at a first power; The fan is controlled to rotate at the first speed.

3. The method according to claim 2, characterized in that The step of controlling the heating element and the fan to operate according to the real-time temperature further comprises: After the heating element operates at the first power and the fan rotates at the first speed, if the real-time temperature is greater than the first temperature, the heating element is controlled to operate at the second power and the fan is controlled to rotate at the second speed, wherein the first temperature is greater than the preset insulation temperature, the second power is less than the first power, the second speed is less than the first speed, and the first temperature is the difference between the set temperature of the cooking fryer for this cooking and the offset value of the first preset temperature.

4. The method according to claim 3, characterized in that The step of controlling the heating element and the fan to operate according to the real-time temperature further comprises: After the heating element operates at the second power and the fan rotates at the second speed, if the real-time temperature is greater than the second temperature, the heating element is turned off and the fan is controlled to rotate at the second speed, wherein the second temperature is the difference between the set temperature of the cooking fryer for this cooking and a second preset temperature offset value, and the second preset temperature offset value is less than the first preset temperature offset value.

5. The method according to claim 4, characterized in that The step of controlling the heating element and the fan to operate according to the real-time temperature further comprises: After the heating element is turned off and the fan rotates at the second speed, if the real-time temperature is lower than a third temperature, the heating element is controlled to work at the second power, and the fan is controlled to rotate at the second speed, wherein the third temperature is a difference between a set temperature of the cooking fryer for this cooking and a third preset temperature offset value, and the third preset temperature offset value is greater than the second preset temperature offset value and less than the first preset temperature offset value.

6. The method according to claim 1, characterized in that Before the step of controlling the heating element and the fan to operate according to the real-time temperature, the method further includes: When the real-time temperature is lower than a preset high-temperature protection release temperature, the fan is controlled to rotate at a second speed, the second speed is lower than the first speed, wherein the high-temperature protection release temperature is higher than the preset insulation temperature.

7. The method according to any one of claims 1 to 6, characterized in that: The method further comprises: In response to the air fryer cooking being finished, starting timing and obtaining the timing duration; When the timing time reaches the preset heat preservation time, the fan and the heating element are turned off, and the air fryer is controlled to enter a standby state.

8. A heat preservation device, characterized in that: Applied to an air fryer, the air fryer comprises a cooking cavity, a heating element and a fan, and the device comprises: A response module, configured to, in response to the completion of cooking in the air fryer, turn off the heating element and control the fan to rotate at a first speed; An acquisition module, used for acquiring the real-time temperature in the cooking cavity; The heat preservation module is used to control the heating element and the fan to work according to the real-time temperature to keep the food in the cooking cavity warm when the real-time temperature is lower than the preset heat preservation temperature.

9. An air fryer, characterized in that: include: A cooking cavity, a heating element, a fan, a memory and a processor, wherein an application is stored in the memory, and the application is configured to enable the air fryer to execute the method according to any one of claims 1 to 7 when called by the processor.

10. A computer-readable storage medium, characterized in that: The computer-readable storage medium stores program codes, and the program codes are configured to execute the method according to any one of claims 1 to 7 when called by a processor.

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