Temperature control method of air fryer
By using the air fryer's temperature sensor and historical status indicators, the working stage of the heating element is dynamically adjusted, solving the problem of inaccurate temperature control caused by user operation during operation, and achieving more precise temperature control and energy-saving effect.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- HONGYANG HOME APPLIANCES
- Filing Date
- 2026-01-29
- Publication Date
- 2026-05-12
AI Technical Summary
Existing air fryers have inaccurate temperature control when the user removes food or restarts the program shortly after canceling it, resulting in overheating or underheating, which affects cooking results and wastes energy.
By acquiring real-time temperature through temperature sensors and combining historical status flags with preset differences, the heating components are dynamically adjusted to enter the preheating, temperature control, and constant temperature stages, avoiding misjudgment of the hot start state and improving temperature control accuracy.
It effectively prevents overheating or underheating, improves temperature control accuracy and cooking results, saves energy, and ensures a better user experience.
Smart Images
Figure CN122018595A_ABST
Abstract
Description
Technical Field
[0001] This disclosure relates to the field of smart home appliance technology, and in particular to a temperature control method for an air fryer. Background Technology
[0002] Air fryers, as a popular cooking appliance, typically work by generating hot air through a heating element to heat food inside the cooking chamber. Precise temperature control is crucial for achieving optimal cooking results and energy efficiency. Existing air fryer temperature control schemes usually employ a fixed heating curve after startup, such as executing fixed preheating, temperature control, and constant temperature phases.
[0003] However, due to the varying heat absorption capacities of different fryer materials, the temperature collected by the temperature sensor (such as a negative temperature coefficient thermistor) in an air fryer differs from the actual temperature inside the fryer under different conditions, leading to temperature overshoot or excessively low preheating temperatures. For example, patent document CN119564054A discloses a temperature control method for an air fryer, which sets a dynamic temperature control point based on the installation position of the temperature sensor relative to the heating element, thereby avoiding excessively high temperature overshoot or excessively low preheating temperatures during the heating process.
[0004] However, the aforementioned patent documents fail to consider that after the air fryer has been heated to a high temperature and entered the temperature control and constant temperature stage, the user may remove the food (pull out the pot) or cancel the program and then restart it shortly after cooking, or restart cooking again shortly after cooking has ended. At this time, the residual temperature of the cooking cavity and the pot body is still high, and the temperature rise trend of the NTC near the heating element will not change. If the complete cold start preheating process is mechanically executed, it will lead to overheating, resulting in excessively high temperatures. This not only wastes energy but may also affect the taste of the food due to excessively high initial temperatures, and may even pose safety hazards. Conversely, if the user removes the food (pull out the pot) or cancels the program and restarts it shortly after cooking when the air fryer has just entered the preheating stage, the device has not yet reached the preheating temperature. However, it mistakenly judges it as a hot start and skips the necessary preheating stage, which will lead to insufficient heating, prolonged cooking time, and a negative user experience. Summary of the Invention
[0005] To address the technical problem of overheating and excessively high temperatures in complex scenarios such as when users remove food mid-cooking (pull out the pan) or restart the program shortly after canceling it, resulting in poor cooking performance due to the device being in a hot-start state, this disclosure provides a temperature control method for an air fryer. Furthermore, this method can further resolve the technical problem of insufficient preheating and low heating efficiency caused by misjudgment of the status in the aforementioned complex scenarios.
[0006] In a first aspect, this disclosure provides a method for temperature control of an air fryer, the method comprising: After the air fryer is started, the first temperature control temperature is obtained, and the real-time temperature is obtained through the temperature sensor. The first temperature control temperature is the preheating sub-stage temperature control temperature set based on the cold start state. Based on the real-time temperature being greater than or equal to the first temperature control temperature, the heating component is directly controlled by the controller to enter the constant temperature sub-stage.
[0007] In some embodiments, the method further includes: Based on the fact that the real-time temperature is lower than the first temperature control temperature, and the difference between the real-time temperature and the first temperature control temperature is greater than or equal to the first preset difference, the controller controls the heating components to enter the preheating sub-stage, the temperature control sub-stage, and the constant temperature sub-stage in sequence. Based on the fact that the real-time temperature is less than the first temperature control temperature, and the difference between the real-time temperature and the first temperature control temperature is less than the first preset difference, the heating component is controlled by the controller to directly enter the constant temperature sub-stage or sequentially enter the preheating sub-stage, the temperature control sub-stage, and the constant temperature sub-stage according to the value of the historical status flag. The first preset difference is determined according to the first temperature control temperature.
[0008] In some embodiments, the method further includes: When the real-time temperature is detected to be lower than the second temperature control temperature, and the difference between the real-time temperature and the second temperature control temperature is greater than or equal to the second preset difference, the historical status flag is reset to the first preset value. Otherwise, the historical state flag is set to the second preset value; The second temperature control temperature is the preheating sub-stage temperature control temperature set during the previous operation of the air fryer. The second preset difference is determined based on the second temperature control temperature. The historical status flag is used to indicate whether the temperature of the air fryer reached the second temperature control temperature during the previous operation. The first preset value is used to indicate that the temperature of the air fryer did not reach the second temperature control temperature during the previous operation. The second preset value is used to indicate that the temperature of the air fryer reached the second temperature control temperature during the previous operation.
[0009] In some embodiments, the heating component is controlled by a controller to directly enter the isothermal sub-stage or sequentially enter the preheating sub-stage, temperature control sub-stage, and isothermal sub-stage based on the value of a historical status flag, including: If the historical status flag is reset to the first preset value, the controller controls the heating components to sequentially enter the preheating sub-stage, the temperature control sub-stage, and the constant temperature sub-stage.
[0010] In some embodiments, the heating assembly is controlled by a controller to sequentially enter a preheating sub-stage, a temperature control sub-stage, and a constant temperature sub-stage, including: If the first temperature control temperature is higher than the temperature control temperature of the constant temperature sub-stage, the controller will control the heating component to enter the preheating sub-stage so that the real-time temperature reaches the first temperature control temperature. The controller controls the heating components to sequentially enter the temperature control sub-stage and the constant temperature sub-stage.
[0011] In some embodiments, the heating assembly is controlled by a controller to sequentially enter a preheating sub-stage, a temperature control sub-stage, and a constant temperature sub-stage, including: If the first temperature control temperature is less than or equal to the temperature control temperature of the constant temperature sub-stage, the controller controls the heating component to enter the preheating sub-stage so that the real-time temperature reaches the third temperature control temperature. The third temperature control temperature is the preheating sub-stage temperature control temperature set based on the hot start state, and the third temperature control temperature is less than the first temperature control temperature. The controller controls the heating components to sequentially enter the temperature control sub-stage and the constant temperature sub-stage.
[0012] In some embodiments, the heating component is controlled by a controller to directly enter the isothermal sub-stage or sequentially enter the preheating sub-stage, temperature control sub-stage, and isothermal sub-stage based on the value of a historical status flag, including: If the historical status flag is set to the second preset value, and the first temperature control temperature is greater than the temperature control temperature of the constant temperature sub-stage, the heating component is controlled to directly enter the constant temperature sub-stage.
[0013] In some embodiments, the method further includes: If the historical status flag is set to the second preset value, and the first temperature control temperature is less than or equal to the temperature control temperature of the constant temperature sub-stage, and the real-time temperature is detected to be less than the third temperature control temperature, the controller controls the heating component to heat up so that the real-time temperature rises to the third temperature control temperature. The controller also controls the heating component to enter the preheating sub-stage, the temperature control sub-stage, and the constant temperature sub-stage in sequence. The third temperature control temperature is the preheating sub-stage temperature control temperature set based on the hot start state, and the third temperature control temperature is less than the first temperature control temperature.
[0014] In some embodiments, the method further includes: If the historical status flag is set to the second preset value, and the first temperature control temperature is less than or equal to the temperature control temperature of the constant temperature sub-stage, and the real-time temperature is detected to be greater than or equal to the third temperature control temperature, the heating component is controlled to directly enter the constant temperature sub-stage. The third temperature control temperature is the preheating sub-stage temperature control temperature set based on the hot start state, and the third temperature control temperature is less than the first temperature control temperature.
[0015] In some embodiments, the air fryer also includes a fan; The method also includes, after the air fryer is started: The fan is controlled to operate for a preset duration, and the real-time temperature is obtained through a temperature sensor after the operation is completed.
[0016] In a second aspect, this disclosure provides an air fryer, including a heating component, a temperature sensor, and a controller disposed on the top of the cooking cavity. The heating component is configured to heat and control the cooking cavity. The controller is preset to control the heating component to enter a cooking stage, namely a preheating sub-stage, a temperature control sub-stage, and a constant temperature sub-stage. The temperature sensor is configured to detect the real-time temperature. The controller is used to implement the temperature control method of the air fryer described in the first aspect.
[0017] The technical solution provided in this disclosure has the following advantages compared with the prior art: The temperature control method for an air fryer according to this embodiment acquires a first controlled temperature and a real-time temperature via a temperature sensor after the air fryer is started. Then, based on the real-time temperature being greater than or equal to the first controlled temperature, the controller directly controls the heating components to enter the constant temperature sub-stage. Therefore, if the real-time temperature inside the air fryer is greater than or equal to the first controlled temperature after startup, it indicates that the air fryer is in a hot-start state, meaning the fryer body and pot are already sufficiently hot. There is no need for further heating through the preheating and temperature control sub-stages; the fryer can directly jump to the constant temperature sub-stage to maintain the controlled temperature. This prevents severe temperature surges caused by continuing to apply preheating power to an already hot pot, thus improving temperature control accuracy. Attached Figure Description
[0018] The above and other features, advantages, and aspects of the embodiments of this disclosure will become more apparent from the accompanying drawings and the following detailed description. Throughout the drawings, the same or similar reference numerals denote the same or similar elements. It should be understood that the drawings are schematic, and the originals and elements are not necessarily drawn to scale.
[0019] Figure 1 A schematic flowchart illustrating a temperature control method for an air fryer provided in an embodiment of this disclosure; Figure 2 A broken line diagram of a temperature change process provided in an embodiment of this disclosure; Figure 3 A broken line diagram illustrating another temperature change process provided in an embodiment of this disclosure; Figure 4 A schematic flowchart illustrating another method for temperature control of an air fryer provided in this embodiment of the present disclosure; Figure 5 This is a schematic flowchart illustrating another method for temperature control of an air fryer provided in an embodiment of this disclosure. Detailed Implementation
[0020] Embodiments of this disclosure will now be described in more detail with reference to the accompanying drawings. While some embodiments of this disclosure are shown in the drawings, it should be understood that this disclosure can be implemented in various forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided to provide a more thorough and complete understanding of this disclosure. It should be understood that the accompanying drawings and embodiments of this disclosure are for illustrative purposes only and are not intended to limit the scope of protection of this disclosure.
[0021] It should be understood that the steps described in the method embodiments of this disclosure may be performed in different orders and / or in parallel. Furthermore, the method embodiments may include additional steps and / or omit the steps shown. The scope of this disclosure is not limited in this respect.
[0022] The names of messages or information exchanged between multiple devices in the embodiments of this disclosure are for illustrative purposes only and are not intended to limit the scope of such messages or information.
[0023] To address the aforementioned problems, this disclosure provides a temperature control method for an air fryer. The following is a detailed explanation... Figures 1 to 5 The temperature control method for the air fryer provided in the embodiments of this disclosure will be described in detail.
[0024] Figure 1 A schematic flowchart of a temperature control method for an air fryer provided in an embodiment of this disclosure is shown.
[0025] In this embodiment, the temperature control method of the air fryer can be executed by a controller in the air fryer. The air fryer may include a heating element, a temperature sensor, and a controller, all disposed at the top of the cooking cavity. The heating element is configured to heat the cooking cavity. The controller is pre-programmed to control the heating element to enter a preheating sub-stage, a temperature control sub-stage, and a constant temperature sub-stage during the cooking process. The temperature sensor (such as a thermistor (Negative Temperature Coefficient thermistor, NTC)) is configured to detect the real-time temperature. In the preheating sub-stage, the air fryer uses a fixed temperature control point to reach a preset temperature. In the temperature control sub-stage, the temperature is gradually increased / decreased based on a comparison of the temperature control points corresponding to the preheating and constant temperature sub-stages, until the final temperature of the air fryer reaches the temperature control point of the constant temperature sub-stage.
[0026] like Figure 1 As shown, the temperature control method for this air fryer may include the following steps.
[0027] S110. After the air fryer is started, the first temperature control temperature is obtained, and the real-time temperature is obtained through the temperature sensor. The first temperature control temperature is the preheating sub-stage temperature control temperature set based on the cold start state.
[0028] Optionally, the first temperature control temperature is the preheating sub-stage temperature control temperature set based on the cold start state. The cold start state characterizes the condition where the air fryer's body and pot temperature are essentially the same as the ambient temperature during initial startup.
[0029] Specifically, after the air fryer is started, the controller can obtain the first temperature control temperature, that is, the preheating sub-stage temperature control temperature set in the cold start state, such as the first temperature control temperature A1 being 200°C, and the controller can obtain the real-time temperature T through the temperature sensor.
[0030] S120: Based on the real-time temperature being greater than or equal to the first temperature control temperature, the heating component is directly controlled by the controller to enter the constant temperature sub-stage.
[0031] In this embodiment of the disclosure, after obtaining the first temperature control temperature and the real-time temperature, the first temperature control temperature and the real-time temperature are compared. If the real-time temperature is greater than or equal to the first temperature control temperature, such as T(205°C) > A1(200°C), it indicates that the air fryer temperature is high and no further preheating is required. Therefore, the preheating sub-stage P1 and the temperature control sub-stage P2 are skipped, and the heating component is directly controlled by the controller to enter the constant temperature sub-stage P3 to avoid temperature overshoot.
[0032] Therefore, in this embodiment, after the air fryer is started, a first temperature control temperature is obtained, and a real-time temperature is obtained through a temperature sensor. Then, based on the real-time temperature being greater than or equal to the first temperature control temperature, the controller directly controls the heating components to enter the constant temperature sub-stage. Thus, after the air fryer is started, if the real-time temperature inside the air fryer is greater than or equal to the first temperature control temperature, it indicates that the air fryer is in a hot start state. It no longer needs to go through a preheating sub-stage and a temperature control sub-stage for heating, and can directly jump to the constant temperature sub-stage to maintain the controlled temperature. This prevents severe temperature surges caused by continuing to apply preheating power to an already hot pot body, improving temperature control accuracy. The hot start state characterizes the state where the air fryer body and pot body are already sufficiently hot at initial startup, for example, both greater than or equal to the first temperature control temperature. Typically, the temperature control temperature of the preheating sub-stage in cold start state is higher than that in hot start state. This method uses the temperature control temperature of the preheating sub-stage in cold start state, i.e., the first temperature control temperature, as the judgment threshold to determine whether the equipment is in hot start state before formal cooking begins. This can improve the accuracy of hot start state judgment, thereby improving temperature control precision, preventing temperature surge, and improving cooking effect.
[0033] Optionally, the temperature control method of the air fryer may further include: based on the real-time temperature being lower than the first temperature control temperature, and the difference between the real-time temperature and the first temperature control temperature being greater than or equal to the first preset difference, controlling the heating components to sequentially enter the preheating sub-stage, the temperature control sub-stage, and the constant temperature sub-stage through the controller. Based on the fact that the real-time temperature is less than the first temperature control temperature, and the difference between the real-time temperature and the first temperature control temperature is less than the first preset difference, the heating component is controlled by the controller to directly enter the constant temperature sub-stage or sequentially enter the preheating sub-stage, the temperature control sub-stage, and the constant temperature sub-stage according to the value of the historical status flag. The first preset difference is determined according to the first temperature control temperature.
[0034] In some embodiments of this disclosure, after obtaining the first temperature control temperature and the real-time temperature, if the real-time temperature is less than the first temperature control temperature, and the difference between the real-time temperature and the first temperature control temperature is greater than or equal to a first preset difference, the heating component can be controlled by the controller to sequentially enter the preheating sub-stage, the temperature control sub-stage, and the constant temperature sub-stage.
[0035] Optionally, the first preset difference can be a pre-set value. For example, the first preset difference R1 can be 2 / 3 of the first temperature control temperature A1.
[0036] For example, the first temperature control temperature A1 is set to 200°C, and the first preset difference R1 is approximately A1*2 / 3 ≈ 133°C. When the air fryer is started, the real-time temperature T (e.g., 50°C) is less than the first temperature control temperature A1 (e.g., 200°C), and the difference between the real-time temperature T and the first temperature control temperature A1 (e.g., 150°C) is greater than or equal to the first preset difference R1 (e.g., 133°C). At this time, it can be determined that the air fryer temperature is low and it is in a cold start state. The controller controls the heating components to heat the air fryer, and the air fryer sequentially enters the preheating sub-stage P1, the temperature control sub-stage P2, and the constant temperature sub-stage P3.
[0037] In some other embodiments of this disclosure, after obtaining the first temperature control temperature and the real-time temperature, if the real-time temperature is lower than the first temperature control temperature and the difference between the real-time temperature and the first temperature control temperature is less than the first preset difference, the heating component can be directly controlled to enter the constant temperature sub-stage or sequentially enter the preheating sub-stage, the temperature control sub-stage, and the constant temperature sub-stage according to the value of the historical status flag.
[0038] Optionally, the historical status flag can represent different states such as incomplete cooling after the last use of the air fryer or interruption before sufficient preheating after a cold start.
[0039] For example, the first temperature control temperature A1 is set to 200°C, and the first preset difference R1 is approximately A1*2 / 3 ≈ 133°C. When the air fryer is started, the real-time temperature T (e.g., 180°C) is less than the first temperature control temperature A1 (e.g., 200°C), and the difference between the real-time temperature T and the first temperature control temperature A1 (e.g., 20°C) is less than the first preset difference R1 (e.g., 133°C). At this time, the air fryer's status cannot be directly determined. Further decisions need to be made based on the historical status flag F to determine whether to directly enter the constant temperature sub-stage by controlling the heating components through the controller, or to sequentially enter the preheating sub-stage, the temperature control sub-stage, and the constant temperature sub-stage.
[0040] Therefore, by subdividing different startup states, the accuracy of state recognition is improved, and atypical startup scenarios (such as mid-process cancellation) are effectively handled, making the control strategy more comprehensive.
[0041] Optionally, the temperature control method of the air fryer may further include: when the real-time temperature is detected to be lower than the second temperature control temperature, and the difference between the real-time temperature and the second temperature control temperature is greater than or equal to the second preset difference, resetting the historical status flag to the first preset value; otherwise, keeping the historical status flag set to the second preset value.
[0042] In some embodiments of this disclosure, when the real-time temperature is detected to be lower than the second temperature control temperature, and the difference between the real-time temperature and the second temperature control temperature is greater than or equal to a second preset difference, the controller can reset the historical status flag to a first preset value.
[0043] Optionally, the second temperature control temperature can be the preheating sub-stage temperature set during the previous operation of the air fryer.
[0044] Optionally, the second preset difference can be determined based on the second temperature control temperature. For example, the second preset difference R2 can be 3 / 4 of the second temperature control temperature A2.
[0045] Optionally, the historical status flag can be used to characterize whether the air fryer reached the second temperature control temperature during its previous operation.
[0046] Optionally, the first preset value is used to indicate that the temperature of the air fryer did not reach the second temperature control temperature during the previous operation.
[0047] Specifically, the controller can obtain the real-time temperature T and the second temperature control temperature A2. The second temperature control temperature A2 can be the preheating sub-stage temperature control temperature set in the microcontroller unit (MCU) during the previous operation of the air fryer. When the real-time temperature T (30°C) is less than the second temperature control temperature A2 (e.g., 190°C), and the difference between the real-time temperature T and the second temperature control temperature A2 (e.g., 160°C) is greater than or equal to the second preset difference R2 (R2 = A2 * 3 / 4 = 142.5°C), the historical status flag F is reset to the first preset value (e.g., 0). When the historical status flag F is the first preset value 0, it means that the air fryer did not reach the second temperature control temperature A2 during the previous operation. That is, the air fryer has just entered the preheating stage after the user started it from a cold state. The food was taken out in the middle (pulling out the pot) or the program was canceled and restarted for a short time. At this time, the device has not reached the preheating temperature and is in a cold start state.
[0048] In some other embodiments of this disclosure, when the real-time temperature is detected to be greater than or equal to the second temperature control temperature, or when the real-time temperature is detected to be less than the second temperature control temperature and the difference between the real-time temperature and the second temperature control temperature is less than the second preset difference, the historical status flag is set to the second preset value.
[0049] Optionally, the second preset value is used to characterize the temperature reached during the previous operation of the air fryer, which is the second temperature control temperature.
[0050] Specifically, the controller can acquire the real-time temperature T and the second temperature control temperature A2. When the real-time temperature T (200°C) is greater than or equal to the second temperature control temperature A2 (e.g., 190°C), or when the real-time temperature T (170°C) is detected to be less than the second temperature control temperature A2 (e.g., 190°C), and the difference between the real-time temperature T and the second temperature control temperature A2 (e.g., 20°C) is less than the second preset difference R2 (142.5°C), the historical status flag F is set to the second preset value (e.g., 1). When the historical status flag F is the second preset value 1, it means that the air fryer reached the second temperature control temperature A2 during the previous operation, that is, the air fryer has been preheated during the previous operation and has not cooled down, which is a hot start state.
[0051] Therefore, by updating the historical status flags in real time, the current judgment is not interfered with by invalid historical information after a long period of cooling. Furthermore, based on the historical status flags, it is possible to accurately determine whether to remove the boiler or cancel the restart during the preheating sub-stage after starting in a cold state, thereby improving the accuracy of temperature control.
[0052] Optionally, based on the value of the historical status flag, the controller can control the heating component to directly enter the constant temperature sub-stage or sequentially enter the preheating sub-stage, temperature control sub-stage, and constant temperature sub-stage, including: if it is determined that the historical status flag is reset to the first preset value, the controller can control the heating component to sequentially enter the preheating sub-stage, temperature control sub-stage, and constant temperature sub-stage.
[0053] In this embodiment, when the real-time temperature is lower than the first temperature control temperature, and the difference between the real-time temperature and the first temperature control temperature is less than the first preset difference, such as when the real-time temperature T (e.g., 180°C) is lower than the first temperature control temperature A1 (e.g., 200°C), and the difference between the real-time temperature T and the first temperature control temperature A1 (e.g., 20°C) is less than the first preset difference R1 (e.g., 133°C), if the controller determines that the historical status flag has been reset to the first preset value (i.e., the historical status flag F is the first preset value 0) when performing heating control based on the value of the historical status flag, it indicates that the air fryer did not reach the second temperature control temperature A2 during its previous operation. This means the air fryer was started by the user in a cold state and had just entered the preheating stage. The user removed food (pulled out the fryer) or canceled the program and restarted it shortly afterward. At this time, the device has not reached the preheating temperature and is in a cold start state. The controller can then control the heating components to sequentially enter the preheating sub-stage P1, the temperature control sub-stage P2, and the constant temperature sub-stage P3.
[0054] Therefore, in scenarios where users remove food (pull out the pot) or restart the program shortly after canceling it when the air fryer has just entered the preheating stage, it is necessary to reheat the air fryer to avoid insufficient control caused by misjudging it as a hot start state and skipping the preheating process, thus ensuring the complete cooking process.
[0055] In this embodiment of the disclosure, the temperature sensor is generally disposed around the heating component. The heating component has a hot end with a fast heating response and a cold end with a slow heating response. When the temperature sensor is disposed at different positions on the heating component, the temperature it senses may be ahead or behind the temperature at the center of the cooking cavity. For example, when the temperature sensor is located at the cold end of the heating element, its temperature sensing lags behind the temperature change at the center of the cooking cavity. After the air fryer starts heating, the ambient temperature detected by the temperature sensor at the cold end of the heating element is lower than the actual temperature at the center of the cooking cavity at the same time. If the air fryer directly controls the heating element based on the ambient temperature detected by the temperature sensor during the heating process, the temperature will rise too high, then gradually decrease, and finally reach equilibrium, with a large temperature fluctuation during this process. When the temperature sensor is located at the hot end of the heating element, its temperature sensing precedes the temperature change at the center of the cooking cavity. After the air fryer starts heating, the ambient temperature detected by the temperature sensor at the hot end of the heating element is higher than the actual temperature at the center of the cooking cavity at the same time. If the air fryer directly controls the heating element based on the ambient temperature detected by the temperature sensor during the heating process, the detected temperature will reach the preset temperature, but the actual temperature at the center of the cooking cavity will not reach the preset temperature, and then the temperature at the center of the cooking cavity will gradually rise and eventually reach equilibrium. Therefore, when the temperature sensor is located at the hot end of the heating element, the preheating sub-stage P1 uses a high temperature control point, meaning the first temperature control temperature of the preheating sub-stage is higher than the temperature control temperature of the isothermal sub-stage. When the temperature sensor is located at the cold end of the heating element, the preheating sub-stage P1 uses a low temperature control point, meaning the first temperature control temperature of the preheating sub-stage is lower than or equal to the temperature control temperature of the isothermal sub-stage. Therefore, the following will provide a detailed explanation based on the different scenarios of the temperature sensor being located at the hot or cold end of the heating element.
[0056] Optionally, the controller controls the heating component to enter the preheating sub-stage, the temperature control sub-stage, and the constant temperature sub-stage in sequence, including: if the first temperature control temperature is greater than the temperature control temperature of the constant temperature sub-stage, the controller controls the heating component to enter the preheating sub-stage so that the real-time temperature reaches the first temperature control temperature; the controller controls the heating component to enter the temperature control sub-stage and the constant temperature sub-stage in sequence.
[0057] In this embodiment of the disclosure, the first temperature control temperature of the preheating sub-stage and the temperature control temperature of the constant temperature sub-stage are compared. When the first temperature control temperature is greater than the temperature control temperature of the constant temperature sub-stage, it indicates that the temperature sensor is located at the hot end of the heating component. The heating component can be controlled by the controller to enter the preheating sub-stage so that the real-time temperature reaches the first temperature control temperature. Then, the heating component is controlled by the controller to enter the temperature control sub-stage and the constant temperature sub-stage in sequence.
[0058] Figure 2A broken line diagram of a temperature change process provided in an embodiment of this disclosure is shown.
[0059] like Figure 2 As shown, when the first temperature control temperature A1 (e.g., 200°C) is determined to be greater than the temperature control temperature of the constant temperature sub-stage (180°C), it indicates that the temperature sensor is located at the hot end of the heating component. The controller first controls the heating component to enter the preheating sub-stage P1. In the preheating sub-stage P1, the real-time temperature T of the air fryer gradually rises to the first temperature control temperature A1 (e.g., 200°C) and enters the temperature control sub-stage P2. In the temperature control sub-stage P2, according to the preset algorithm (e.g., changes with time or temperature), the real-time temperature T is controlled to gradually decrease from the first temperature control temperature A1 (e.g., 200°C) to 180°C and enters the constant temperature sub-stage P3, so that the real-time temperature T is maintained near the temperature control temperature (180°C).
[0060] Therefore, by setting the temperature sensor at the hot end of the heating component, a higher temperature control temperature is set, which reduces the influence of the relative installation position on the temperature sensor's temperature sensing. This effectively reduces the temperature fluctuation range of the air fryer during the heating process, avoids excessive temperature surge or excessively low preheating temperature during heating, and improves the temperature control efficiency, accuracy, and stability of the air fryer during the heating process.
[0061] Optionally, the controller controls the heating component to sequentially enter the preheating sub-stage, the temperature control sub-stage, and the constant temperature sub-stage, including: if the first temperature control temperature is less than or equal to the temperature control temperature of the constant temperature sub-stage, the controller controls the heating component to enter the preheating sub-stage so that the real-time temperature reaches the third temperature control temperature, the third temperature control temperature is the preheating sub-stage temperature control temperature set based on the hot start state, and the third temperature control temperature is less than the first temperature control temperature; the controller controls the heating component to sequentially enter the temperature control sub-stage and the constant temperature sub-stage.
[0062] Optionally, the third temperature control temperature is the preheating sub-stage temperature set based on the hot start state.
[0063] In this embodiment, the first temperature control temperature of the preheating sub-stage and the temperature control temperature of the constant temperature sub-stage are compared. When the first temperature control temperature is less than or equal to the temperature control temperature of the constant temperature sub-stage, it indicates that the temperature sensor is located at the cold end of the heating component. The heating component can be controlled by the controller to enter the preheating sub-stage so that the real-time temperature reaches the third temperature control temperature. Then, the heating component is controlled by the controller to enter the temperature control sub-stage and the constant temperature sub-stage in sequence.
[0064] Figure 3 A broken line diagram of another temperature change process provided in an embodiment of this disclosure is shown.
[0065] like Figure 3As shown, when the first temperature control temperature A1 (e.g., 160°C) is determined to be less than or equal to the temperature control temperature of the constant temperature sub-stage (180°C), it indicates that the temperature sensor is located at the cold end of the heating component. The controller first controls the heating component to enter the preheating sub-stage P1. In the preheating sub-stage P1, the real-time temperature T of the air fryer gradually rises to the third temperature control temperature A3 (e.g., 140°C), and enters the temperature control sub-stage P2. In the temperature control sub-stage P2, according to the preset algorithm (e.g., changes with time or temperature), the real-time temperature T is controlled to gradually rise from the third temperature control temperature A3 (e.g., 140°C) to 180°C, and enters the constant temperature sub-stage P3, so that the real-time temperature T is maintained near the temperature control temperature (180°C).
[0066] Therefore, by setting the temperature sensor at the cold end of the heating element, the influence of the relative installation position on the temperature sensor's temperature sensing is reduced by setting a lower temperature control temperature. This effectively reduces the temperature fluctuation range of the air fryer during the heating process, avoids excessive temperature surge or excessively low preheating temperature during heating, and improves the temperature control efficiency, accuracy, and stability of the air fryer during the heating process.
[0067] Optionally, based on the value of the historical status flag, the controller can control the heating component to directly enter the constant temperature sub-stage or sequentially enter the preheating sub-stage, temperature control sub-stage, and constant temperature sub-stage, including: if it is determined that the historical status flag is set to the second preset value and the first temperature control temperature is greater than the temperature control temperature of the constant temperature sub-stage, the controller can control the heating component to directly enter the constant temperature sub-stage.
[0068] In this embodiment, when the real-time temperature is lower than the first temperature control temperature, and the difference between the real-time temperature and the first temperature control temperature is less than the first preset difference (e.g., real-time temperature T (e.g., 180°C) is lower than the first temperature control temperature A1 (e.g., 200°C), and the difference between the real-time temperature T and the first temperature control temperature A1 (e.g., 20°C) is less than the first preset difference R1 (e.g., 133°C), when the controller performs heating control based on the value of the historical status flag, if it determines that the historical status flag has been reset to the second preset value, i.e., the historical status flag F is the second preset value 1, and the first temperature control temperature A1 (e.g., 200°C) is greater than the temperature control temperature of the constant temperature sub-stage (e.g., 180°C), it indicates that the air fryer has completed its previous preheating and has not cooled down, indicating a hot start state. Then, the controller can directly control the heating component to enter the constant temperature sub-stage P3.
[0069] Therefore, in scenarios where the air fryer has already been preheated in the previous operation and has not yet cooled down, the system can directly switch to the thermostat sub-stage to maintain the temperature control, thereby preventing severe temperature surge caused by continuing to apply preheating power to the already hot fryer and improving the accuracy of temperature control.
[0070] Optionally, the temperature control method of the air fryer may further include: if it is determined that the historical status flag is set to the second preset value, and the first temperature control temperature is less than or equal to the temperature control temperature of the constant temperature sub-stage, and the real-time temperature is detected to be less than the third temperature control temperature, the heating component is controlled by the controller to heat the air fryer so that the real-time temperature rises to the third temperature control temperature, and the heating component is controlled to enter the preheating sub-stage, the temperature control sub-stage and the constant temperature sub-stage in sequence.
[0071] In this embodiment of the disclosure, when the real-time temperature is lower than the first temperature control temperature, and the difference between the real-time temperature and the first temperature control temperature is less than a first preset difference, such as when the real-time temperature T (e.g., 180°C) is lower than the first temperature control temperature A1 (e.g., 200°C), and the difference between the real-time temperature T and the first temperature control temperature A1 (e.g., 20°C) is less than the first preset difference R1 (e.g., 133°C), when the controller performs heating control based on the value of the historical status flag, if it determines that the historical status flag has been reset to a second preset value, When the historical status flag F is the second preset value 1, and the first temperature control temperature A1 (e.g., 200°C) is less than or equal to the temperature control temperature of the constant temperature sub-stage (e.g., 210°C), when the real-time temperature T (e.g., 150°C) is detected to be less than the third temperature control temperature A3 (e.g., 160°C), the heating component is controlled by the controller to heat the components so that the real-time temperature T rises to the third temperature control temperature A3 (e.g., 160°C), and the components sequentially enter the preheating sub-stage P1, the temperature control sub-stage P2, and the constant temperature sub-stage P3.
[0072] Therefore, when the historical status flag is 1 and the real-time temperature T is less than the third temperature control temperature A3, although the air fryer is in a hot start state, the temperature has not reached the corresponding preheating point. This causes the air fryer to start the rising process from a temperature lower than the constant temperature point, avoiding the problem of excessive heat accumulation and making the temperature control more stable.
[0073] Optionally, the temperature control method of the air fryer may further include: if it is determined that the historical status flag is set to the second preset value, and the first temperature control temperature is less than or equal to the temperature control temperature of the constant temperature sub-stage, and the real-time temperature is detected to be greater than or equal to the third temperature control temperature, controlling the heating component to directly enter the constant temperature sub-stage.
[0074] In this embodiment of the disclosure, when the real-time temperature is less than the first temperature control temperature, and the difference between the real-time temperature and the first temperature control temperature is less than the first preset difference, such as when the real-time temperature T (e.g., 180°C) is less than the first temperature control temperature A1 (e.g., 200°C), and the difference between the real-time temperature T and the first temperature control temperature A1 (e.g., 20°C) is less than the first preset difference R1 (e.g., 133°C), when the controller performs heating control based on the value of the historical status flag, if it is determined that the historical status flag has been reset to the second preset value, that is, when the historical status flag F is the second preset value 1, and the first temperature control temperature A1 (e.g., 200°C) is less than or equal to the temperature control temperature of the constant temperature sub-stage (e.g., 210°C), when the real-time temperature T (e.g., 180°C) is detected to be greater than or equal to the third temperature control temperature A3 (e.g., 160°C), the controller controls the heating component to directly enter the constant temperature sub-stage P3.
[0075] Therefore, when the historical status flag is 1 and the real-time temperature T is greater than or equal to the third temperature control temperature A3, the air fryer is in a hot start state and the temperature has reached the preheating point. The air fryer is directly controlled to enter the constant temperature sub-stage and maintain the temperature at the third temperature control temperature, avoiding excessive preheating and ensuring more stable temperature control.
[0076] Optionally, the air fryer also includes a fan to make the temperature inside the air fryer more even.
[0077] Optionally, the temperature control method of the air fryer may also include: controlling the fan to work for a preset duration, and obtaining the real-time temperature through a temperature sensor after the work is completed.
[0078] In this embodiment of the disclosure, after the air fryer is started, in order to avoid uneven temperature inside the air fryer cavity, the controller can control the fan to work for a preset duration, such as controlling the fan to run at the rated speed for 4 seconds, so that the temperature distribution inside the cavity is more uniform, and the real-time temperature is obtained through the temperature sensor after the work is completed.
[0079] This reduces temperature measurement errors caused by the stratification of hot air inside the cavity, making the basic data for state judgment more reliable, enabling decisions to be made based on more accurate temperature, reducing the possibility of misjudgment, and making the entire control process more stable.
[0080] The following section provides a detailed explanation of the temperature control method for air fryers, taking into account the different locations of the temperature sensor, whether it is placed at the cold or hot end of the heating element.
[0081] Figure 4 A schematic flowchart of another air fryer temperature control method provided in an embodiment of this disclosure is shown.
[0082] like Figure 4As shown, after the air fryer is started, the controller can obtain the first temperature control temperature A1 and the real-time temperature T. If the first temperature control temperature A1 (e.g., 200°C) is greater than the temperature control temperature of the constant temperature sub-stage (e.g., 180°C), then it is determined that the temperature sensor is located at the hot end of the heating component.
[0083] In some examples, it is determined whether the real-time temperature T is less than the first temperature control temperature A1. If the real-time temperature T is greater than or equal to the first temperature control temperature A1, such as T (205°C) > A1 (200°C), then no further preheating is required. The preheating sub-stage P1 and the temperature control sub-stage P2 are skipped, and the heating component is directly controlled by the controller to enter the constant temperature sub-stage P3 to avoid temperature overshoot.
[0084] In some examples, it is determined whether the real-time temperature T is less than the first temperature control temperature A1. If the real-time temperature T is less than the first temperature control temperature A1, such as T (50°C) < A1 (200°C), then it is further determined whether the difference between the real-time temperature T and the first temperature control temperature A1 is less than the first preset difference R1. The first preset difference R1 can be 2 / 3 of the first temperature control temperature A1. If the difference between the real-time temperature T and the first temperature control temperature A1 (e.g., 150°C) is greater than or equal to the first preset difference R1 (e.g., 133°C), the controller controls the heating component to enter the preheating sub-stage P1 so that the real-time temperature T reaches the first temperature control temperature A1 (e.g., 200°C). Then it enters the temperature control sub-stage P2, and controls the real-time temperature T to gradually decrease to 180°C according to the preset algorithm (e.g., with time or temperature change). Then it enters the constant temperature sub-stage P3 and maintains the real-time temperature T near the temperature control temperature (180°C).
[0085] In some examples, if the real-time temperature T (e.g., 180°C) is less than the first temperature control temperature A1 (e.g., 200°C), and the difference between the real-time temperature T and the first temperature control temperature A1 (e.g., 20°C) is less than the first preset difference R1 (e.g., 133°C), it is necessary to determine whether the historical status flag F is the first preset value to make further decisions, in order to determine whether to control the heating component directly to enter the constant temperature sub-stage P3 or to enter the preheating sub-stage P1, the temperature control sub-stage P2, and the constant temperature sub-stage P3 in sequence.
[0086] In some examples, if the historical status flag is reset to the first preset value of 0, it indicates that the air fryer did not reach the second temperature control temperature A2 during its previous operation. This means the air fryer was started cold by the user and had just entered the preheating stage. Food was removed (by pulling out the fryer) or the program was canceled and restarted shortly afterward. In this cold start state, the device had not yet reached the preheating temperature. The controller can then control the heating components to sequentially enter the preheating sub-stage P1 (where the real-time temperature T reaches the first temperature control temperature A1), the temperature control sub-stage P2, and the constant temperature sub-stage P3.
[0087] In some examples, if the historical status flag is reset to the second preset value 1, it indicates that the air fryer has completed its previous preheating and has not cooled down, indicating a hot start state. In this case, the controller can directly control the heating components to enter the isothermal sub-stage P3.
[0088] Figure 5 A schematic flowchart of another temperature control method for an air fryer provided in an embodiment of this disclosure is shown.
[0089] like Figure 5 As shown, after the air fryer is started, the controller can obtain the first temperature control temperature A1 and the real-time temperature T. If the first temperature control temperature A1 (e.g., 180°C) is less than or equal to the temperature control temperature of the constant temperature sub-stage (e.g., 200°C), then it is determined that the temperature sensor is located at the cold end of the heating component.
[0090] In some examples, it is determined whether the real-time temperature T is less than the first temperature control temperature A1. If the real-time temperature T is greater than or equal to the first temperature control temperature A1, such as T (205°C) > A1 (180°C), then no further preheating is required. The preheating sub-stage P1 and the temperature control sub-stage P2 are skipped, and the heating component is directly controlled by the controller to enter the constant temperature sub-stage P3 to avoid temperature overshoot.
[0091] In some examples, it is determined whether the real-time temperature T is less than the first temperature control temperature A1. If the real-time temperature T is less than the first temperature control temperature A1, such as T (50°C) < A1 (180°C), it is further determined whether the difference between the real-time temperature T and the first temperature control temperature A1 is less than the first preset difference R1. The first preset difference R1 can be 2 / 3 of the first temperature control temperature A1. If the difference between the real-time temperature T and the first temperature control temperature A1 (e.g., 130°C) is greater than or equal to the first preset difference R1 (e.g., 120°C), the controller controls the heating component to enter the preheating sub-stage P1 so that the real-time temperature T reaches the third temperature control temperature A1 (e.g., 160°C). Then it enters the temperature control sub-stage P2, and controls the real-time temperature T to gradually rise to 200°C according to the preset algorithm (e.g., with time or temperature change). Then it enters the constant temperature sub-stage P3 and maintains the real-time temperature T near the temperature control temperature (200°C).
[0092] In some examples, if the real-time temperature T (e.g., 160°C) is less than the first temperature control temperature A1 (e.g., 180°C), and the difference between the real-time temperature T and the first temperature control temperature A1 (e.g., 20°C) is less than the first preset difference R1 (e.g., 120°C), it is necessary to determine whether the historical status flag F is the first preset value to make further decisions, in order to determine whether to directly enter the constant temperature sub-stage P3 by controlling the heating component through the controller or to enter the preheating sub-stage P1, the temperature control sub-stage P2, and the constant temperature sub-stage P3 in sequence.
[0093] In some examples, if the historical status flag is reset to the first preset value of 0, it indicates that the air fryer did not reach the second temperature control temperature A2 during its previous operation. This means the air fryer was started cold by the user and had just entered the preheating stage. Food was removed (by pulling out the fryer) or the program was canceled and restarted shortly afterward, meaning the device had not reached the preheating temperature and was in a cold start state. The controller can then control the heating components to sequentially enter the preheating sub-stage P1 (where the real-time temperature T reaches the third temperature control temperature A3), the temperature control sub-stage P2, and the constant temperature sub-stage P3.
[0094] In some examples, if the historical status flag is determined to be reset to the second preset value 1, the system continues to determine whether the real-time temperature T is less than the third temperature control temperature A3. If the real-time temperature T (e.g., 180°C) is greater than or equal to the third temperature control temperature A3 (e.g., 160°C), the heating component is controlled by the controller to directly enter the constant temperature sub-stage P3.
[0095] In some examples, if the historical status flag is determined to be reset to the second preset value 1, the system continues to determine whether the real-time temperature T is less than the third temperature control temperature A3. If the real-time temperature T (e.g., 150°C) is less than the third temperature control temperature A3 (e.g., 160°C), the system controls the heating component to heat the components so that the real-time temperature T rises to the third temperature control temperature A3 (e.g., 160°C), and then proceeds sequentially to the preheating sub-stage P1, the temperature control sub-stage P2, and the constant temperature sub-stage P3.
[0096] Optionally, the air fryer may include a heating element, a temperature sensor, a controller, and a fan disposed on the top of the cooking cavity. The heating element is configured to control the heating of the cooking cavity. The controller is preset to control the heating element to enter a preheating sub-stage, a temperature control sub-stage, and a constant temperature sub-stage during the cooking process. The temperature sensor is configured to detect the real-time temperature, and the fan is used to make the temperature inside the air fryer more uniform. In the preheating sub-stage, the air fryer uses a fixed temperature control point to control the temperature, so that the air fryer reaches the preset temperature. In the temperature control sub-stage, the temperature is gradually increased / decreased based on the comparison of the temperature control points corresponding to the preheating and constant temperature sub-stages, so that the final temperature of the air fryer reaches the temperature control point of the constant temperature sub-stage.
[0097] It should be noted that, in this document, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the term "comprising" is intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus.
[0098] The above description is merely a specific embodiment of this disclosure, enabling those skilled in the art to understand or implement it. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of this disclosure. Therefore, this disclosure is not to be limited to the embodiments described herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims
1. A temperature control method for an air fryer, characterized in that, The air fryer includes a heating element, a temperature sensor, and a controller disposed on the top of the cooking cavity. The heating element is configured to control the heating of the cooking cavity. The controller is preset to control the heating element to enter a cooking stage, namely a preheating sub-stage, a temperature control sub-stage, and a constant temperature sub-stage. The temperature sensor is configured to detect the real-time temperature. The method includes: After the air fryer is started, a first temperature control temperature is obtained, and the real-time temperature is obtained through the temperature sensor. The first temperature control temperature is the preheating sub-stage temperature control temperature set based on the cold start state. Based on the real-time temperature being greater than or equal to the first temperature control temperature, the controller controls the heating component to directly enter the constant temperature sub-stage.
2. The method according to claim 1, characterized in that, The method further includes: Based on the fact that the real-time temperature is less than the first temperature control temperature, and the difference between the real-time temperature and the first temperature control temperature is greater than or equal to a first preset difference, the controller controls the heating component to enter the preheating sub-stage, the temperature control sub-stage, and the constant temperature sub-stage in sequence. Based on the fact that the real-time temperature is less than the first temperature control temperature, and the difference between the real-time temperature and the first temperature control temperature is less than the first preset difference, the heating component is controlled by the controller to directly enter the constant temperature sub-stage or sequentially enter the preheating sub-stage, the temperature control sub-stage, and the constant temperature sub-stage according to the value of the historical status flag. The first preset difference is determined based on the first temperature control temperature.
3. The method according to claim 2, characterized in that, The method further includes: When the real-time temperature is detected to be lower than the second temperature control temperature, and the difference between the real-time temperature and the second temperature control temperature is greater than or equal to the second preset difference, the historical status flag is reset to the first preset value. Otherwise, the historical state flag is kept set to the second preset value; Wherein, the second temperature control temperature is the preheating sub-stage temperature control temperature set during the previous operation of the air fryer, the second preset difference is determined based on the second temperature control temperature, the historical status flag is used to indicate whether the temperature of the air fryer reached the second temperature control temperature during the previous operation, the first preset value is used to indicate that the temperature of the air fryer did not reach the second temperature control temperature during the previous operation, and the second preset value is used to indicate that the temperature of the air fryer reached the second temperature control temperature during the previous operation.
4. The method according to claim 3, characterized in that, The step of controlling the heating component to directly enter the isothermal sub-stage or sequentially enter the preheating sub-stage, the temperature control sub-stage, and the isothermal sub-stage based on the value of the historical status flag via the controller includes: If it is determined that the historical status flag is reset to the first preset value, the controller controls the heating component to sequentially enter the preheating sub-stage, the temperature control sub-stage, and the constant temperature sub-stage.
5. The method according to claim 2, characterized in that, The step of controlling the heating component to sequentially enter the preheating sub-stage, the temperature control sub-stage, and the constant temperature sub-stage via the controller includes: If the first temperature control temperature is greater than the temperature control temperature of the constant temperature sub-stage, the controller controls the heating component to enter the preheating sub-stage so that the real-time temperature reaches the first temperature control temperature. The controller controls the heating components to sequentially enter the temperature control sub-stage and the constant temperature sub-stage.
6. The method according to claim 2, characterized in that, The step of controlling the heating component to sequentially enter the preheating sub-stage, the temperature control sub-stage, and the constant temperature sub-stage via the controller includes: If the first temperature control temperature is less than or equal to the temperature control temperature of the constant temperature sub-stage, the controller controls the heating component to enter the preheating sub-stage so that the real-time temperature reaches the third temperature control temperature. The third temperature control temperature is the preheating sub-stage temperature control temperature set based on the hot start state, and the third temperature control temperature is less than the first temperature control temperature. The controller controls the heating components to sequentially enter the temperature control sub-stage and the constant temperature sub-stage.
7. The method according to claim 3, characterized in that, The step of controlling the heating component to directly enter the isothermal sub-stage or sequentially enter the preheating sub-stage, the temperature control sub-stage, and the isothermal sub-stage based on the value of the historical status flag via the controller includes: If it is determined that the historical status flag is set to the second preset value, and the first temperature control temperature is greater than the temperature control temperature of the constant temperature sub-stage, the heating component is controlled to directly enter the constant temperature sub-stage.
8. The method according to claim 3, characterized in that, The method further includes: If it is determined that the historical status flag is set to the second preset value, and the first temperature control temperature is less than or equal to the temperature control temperature of the constant temperature sub-stage, and the real-time temperature is detected to be less than the third temperature control temperature, the controller controls the heating component to heat up so that the real-time temperature rises to the third temperature control temperature, and controls the heating component to sequentially enter the preheating sub-stage, the temperature control sub-stage, and the constant temperature sub-stage, wherein the third temperature control temperature is the preheating sub-stage temperature control temperature set based on the hot start state, and the third temperature control temperature is less than the first temperature control temperature.
9. The method according to claim 3, characterized in that, The method further includes: If it is determined that the historical status flag is set to the second preset value, and the first temperature control temperature is less than or equal to the temperature control temperature of the constant temperature sub-stage, and the real-time temperature is detected to be greater than or equal to the third temperature control temperature, the heating component is controlled to directly enter the constant temperature sub-stage. The third temperature control temperature is the preheating sub-stage temperature control temperature set based on the hot start state, and the third temperature control temperature is less than the first temperature control temperature.
10. The method according to claim 1, characterized in that, The air fryer also includes a fan; The method further includes, after the air fryer is started: The fan is controlled to operate for a preset duration, and the real-time temperature is obtained through the temperature sensor after the operation is completed.