Air fryer control method and device, air fryer and storage medium

Abstract

The invention discloses a control method and device of an air fryer, the air fryer and a storage medium. The air fryer comprises a shell, a fan module and a detection module. The shell is provided with a cooking cavity. The fan module comprises a motor and fan blades, the motor is arranged in the shell, and the fan blades are in transmission connection with the motor and face the cooking cavity. The detection module is arranged in the shell and comprises a current detection unit and a controller, and the current detection unit is connected between the motor and the controller and used for detecting the working current of the motor. The controller is configured to obtain the working current of the motor in response to a working instruction of the air fryer; judging whether the working current is in an abnormal current interval or not; and controlling the air fryer to stop working under the condition that the working current of the motor is in the abnormal current interval. Therefore, the air fryer can avoid the situation that fire disasters are caused by rapid temperature rise in the air fryer by detecting the working current of the motor, so that the use safety of the air fryer is ensured.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of cooking appliances, and more particularly, to a control method and device of an air fryer, the air fryer and a storage medium. BACKGROUND

[0002] An air fryer is a cooking appliance that can use heat to fry food. Specifically, the air fryer includes a heating pipe and a fan arranged in a pot body, wherein the heating pipe is used to heat the air in the pot body, and the fan is used to blow hot air into the pot to heat the food, so that the hot air can circulate in the pot body, thereby dehydrating the food to achieve the effect of frying the food.

[0003] However, abnormal operation of the fan (for example, fan stall, unstable speed, etc.) can easily cause the temperature inside the pot body to rise sharply, resulting in shutdown and even fire. SUMMARY

[0004] The present application provides a control method and device of an air fryer, the air fryer and a storage medium.

[0005] According to a first aspect of the present application, the embodiments of the present application provide an air fryer, which includes a housing, a fan module and a detection module. The housing is provided with a cooking cavity. The fan module includes a motor and a fan blade, the motor is arranged in the housing, and the fan blade is drivingly connected with the motor and arranged towards the cooking cavity. The detection module is arranged in the housing, and includes a current detection unit and a controller. The current detection unit is connected between the motor and the controller, and is used to detect the working current of the motor. The controller is configured to: in response to a working instruction of the air fryer, acquire the working current of the motor; determine whether the working current is in an abnormal current interval; and control the air fryer to stop working in the case that the working current of the motor is in the abnormal current interval.

[0006] According to a second aspect of the present application, the embodiments of the present application further provide a control method of an air fryer, the air fryer including a fan module and a detection module; wherein the fan module includes a motor and a fan blade drivingly connected; the detection module includes a current detection unit and a controller, and the current detection unit is connected between the motor and the controller; the method includes: in response to a working instruction of the air fryer, acquiring the working current of the motor; determining whether the working current is in an abnormal current interval; and controlling the air fryer to stop working in the case that the working current of the motor is in the abnormal current interval.

[0007] According to a third aspect of the present application, the embodiments of the present application further provide a control device of an air fryer, the air fryer comprising a fan module and a detection module; wherein the fan module comprises a motor and a fan blade connected in transmission; the detection module comprises a current detection unit and a controller, the current detection unit being connected between the motor and the controller; the device comprises a current acquisition module, a judgment module and a control module. The current acquisition module is configured to acquire the working current of the motor in response to a working instruction of the air fryer. The judgment module is configured to judge whether the working current is in an abnormal current range. The control module is configured to control the air fryer to stop working in the case that the working current of the motor is in the abnormal current range.

[0008] According to a fourth aspect of the present application, the embodiments of the present application further provide an air fryer comprising one or more processors, a memory and one or more application programs. The one or more application programs are stored in the memory and configured to be executed by the one or more processors, and configured to execute the control method described above.

[0009] According to a fifth aspect of the present application, the embodiments of the present application further provide a computer readable storage medium, the computer readable storage medium storing computer program instructions, the computer program instructions being executable by a processor to execute the control method described above.

[0010] According to a sixth aspect of the present application, the embodiments of the present application further provide a computer program product, the computer program product being executed to implement the control method described above.

[0011] The present application provides a control method and device of an air fryer, the air fryer can comprise a shell, a fan module and a detection module. The detection module can comprise a current detection unit and a controller, the current detection unit being connected between the motor and the controller, and being configured to detect the working current of the motor.

[0012] Therefore, the air fryer in the present application detects the working current of the motor through the current detection unit, and then stops working in the case that the working current of the motor is an abnormal value (i.e., in the abnormal current range), which indicates that the fan module is faulty (e.g., no fan blade installed, motor locked-rotor, low speed, etc.). At this time, the controller controls the air fryer to stop working, thereby avoiding the situation that the air fryer rapidly heats up due to the accumulation of heat inside the air fryer, and thus causing a fire, and ensuring the safe use of the air fryer.

[0013] Further, the working current acquired by the current detection unit can timely reflect the working condition of the motor, so that the controller can control the air fryer to stop working at the first time when the motor is faulty, thereby improving the product reliability of the air fryer. BRIEF DESCRIPTION OF DRAWINGS

[0014] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following will briefly introduce the drawings needed to be used in the embodiments description. Obviously, the drawings described in the following embodiments are only some of the embodiments of the present application, and all other drawings obtained by those skilled in the art without creative effort based on these drawings are within the protection scope of the present application.

[0015] Figure 1 is a structural schematic diagram of an air fryer provided by the embodiments of the present application.

[0016] Figure 2 is Figure 1 is a sectional schematic diagram of the air fryer shown in

[0017] Figure 3 is Figure 1 is a current structure schematic diagram of the current detection unit in the air fryer shown in

[0018] Figure 4 is a flow schematic diagram of a control method of an air fryer provided by the first embodiment of the present application.

[0019] Figure 5 is a flow schematic diagram of a control method of an air fryer provided by the second embodiment of the present application.

[0020] Figure 6 is a flow schematic diagram of a control method of an air fryer provided by the third embodiment of the present application.

[0021] Figure 7 is a module block diagram of a control device of an air fryer provided by the embodiments of the present application.

[0022] Figure 8 is a module block diagram of an air fryer provided by the embodiments of the present application.

[0023] Figure 9 is a module block diagram of a computer readable storage medium provided by the embodiments of the present application. DETAILED DESCRIPTION

[0024] In order to make the person skilled in the art better understand the present application, the following will combine the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only some of the embodiments of the present application, not all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present application.

[0025] Please refer to Figure 1 and Figure 2The embodiment of the present application provides an air fryer 100, which is an appliance capable of cooking food by heat. Specifically, when the air fryer 100 works, heat is generated by a heating element (for example, a heating pipe) inside a pot body, and then the heat is converted into hot air circulating in the pot body by a fan, so that the food in the pot body is dehydrated to achieve the effect of frying the food.

[0026] In the embodiment, the air fryer 100 can include a shell 10, a fan module 30 and a detection module 50, wherein the shell 10 serves to fix and protect the fan module 30 and the detection module 50. Specifically, the shell 10 can include a pot body shell 120 and a pot cover shell 140 connected with each other, and the pot body shell 120 and the pot cover shell 140 are covered with each other. In some possible embodiments, the air fryer 100 is a flip cover type appliance, and one side of the pot cover shell 140 is rotatably connected to the pot body shell 120. In other possible embodiments, the air fryer 100 is a drawer type appliance, and the pot cover shell 140 can be integrally formed or assembled with the shell structure of the pot body shell 120.

[0027] In the embodiment, the pot body shell 120 can be provided with a cooking cavity 121 for placing food to be cooked. When the air fryer 100 is in a working state, the pot cover shell 140 covers the cooking cavity 121 and heats the food in the cooking cavity 121. Specifically, the air fryer 100 can further include a heating element 70 arranged on the side of the pot cover shell 140 facing the cooking cavity 121, which is used to generate heat. Specifically, the heating element 70 can be a heating pipe, which is a heating device made by arranging an electric heating wire into a metal pipe (for example, a carbon steel pipe, a titanium pipe, a stainless steel pipe, a copper pipe, etc.). The heating element 70 can also be a carbon tube, which is a heating device taking carbon fiber as a heat transfer body, and the embodiment does not limit the specific implementation mode of the heating element 70. The heating element 70 can also be an electromagnetic heating element, and the fan blade 130 is a magnetic metal material such as iron, which is inducted by the electromagnetic heating element to generate heat.

[0028] In the embodiment, the fan module 30 is arranged on the cover shell 140 and located at the side of the heating element 70 facing the cooking cavity 121, which is used to convert the heat generated by the heating element 70 into hot air circulating in the cooking cavity 121. The fan module 30 can include a motor 320 and a fan blade 340. The motor 320 is arranged in the cover shell 140, and the fan blade 340 is drivingly connected to the motor 320 and arranged towards the cooking cavity 121. In some possible embodiments, the cover shell 140 can be provided with a mounting cavity 141, and the motor 320 is arranged in the mounting cavity 141 to protect the motor 320. Specifically, the motor 320 can be a rotary motor (e.g., a brushless motor). The fan blade 340 is connected to the output shaft of the motor 320 and arranged at the side of the heating element 70 facing the cooking cavity 121, so as to rotate continuously under the driving of the motor 320, thereby forming hot air in the cooking cavity 121.

[0029] In some possible embodiments, the fan module 30 adopts an electromagnetic driving fan blade working mode. For example, an electromagnetic disk driving fan blade 340 can be adopted. Specifically, since the fan blade 340 is usually made of a metal material (e.g., iron, aluminum and alloys thereof), under the joint action of electromagnetism and the metal material, the fan blade 340 generates heat. Therefore, in the process of continuous rotation of the fan blade 340, hot air blowing into the cooking cavity 121 is formed.

[0030] However, if the fan module 30 fails (e.g., the fan is forgotten to be installed or the motor is blocked), and the electromagnetic heating speed is relatively fast, the heat generated at the fan blade 340 cannot be dissipated into the cooking cavity 121, resulting in a large amount of heat accumulated at the fan module 30, causing the air fryer 100 to be locally overheated, and even causing a fire.

[0031] Therefore, the air fryer 100 in the application detects the working current of the motor 320 through the current detection unit 510, and when the working current of the motor 320 is an abnormal value (i.e., in an abnormal current range), it indicates that the fan blade 340 fails (e.g., the fan is forgotten to be installed, the motor is blocked, the rotating speed is slow, etc.). At this time, the controller 520 controls the air fryer 100 to stop working, thereby avoiding the air fryer 100 to be locally overheated and even causing a fire, and ensuring the use safety of the air fryer 100.

[0032] In the embodiment, the detection module 50 is arranged in the shell 10 and electrically connected with the motor 320, which can obtain the working current of the motor 320 and judge whether the motor 320 is in an abnormal working state based on the working current. Specifically, the detection module 50 can be a detection circuit board provided with a controller 520, and the detection circuit board can be arranged in the mounting cavity 141.

[0033] Referring to Figure 3 , the detection module 50 can include a current detection unit 510 and a controller 520, the current detection unit 510 is connected between the motor 320 and the controller 520, and is used to detect the working current of the motor 320. In the embodiment, the current detection unit 510 is provided with a first power supply end 512 and a second power supply end 514 suitable for being connected to the mains, and the first power supply end 512 and the second power supply end 514 can be two connection terminals respectively, wherein the first power supply end 512 is connected to the live wire of the mains voltage, and the second power supply end 514 is connected to the zero line of the mains voltage. That is, the current detection unit 510 in the embodiment can not only be used to detect the working current of the motor 320, but also be used to supply power to the motor 320.

[0034] In the embodiment, the current detection unit 510 can include a transformer 5120 and a rectifier unit 5140. Wherein the transformer 5120 includes a transformer primary side 5121 and a transformer secondary side 5123 coupled to each other, and the transformer primary side 5121 and the motor 320 are connected in series and then connected between the first power supply end 512 and the second power supply end 514. Figure 3 In the embodiment shown, the first power supply end 512, the transformer primary side 5121, the motor 320 and the second power supply end 514 are connected in sequence. One end of the transformer secondary side 5123 is connected to the input end of the rectifier unit 5140, the other end of the transformer secondary side 5123 is grounded, and the output end of the rectifier unit 5140 is connected to the controller 520.

[0035] Therefore, the motor 320 in the embodiment is an alternating current motor, the transformer primary side 5121 can couple the alternating current in the branch where the motor 320 is located to the transformer secondary side 5123, and the alternating current in the branch where the transformer secondary side 5123 is located is output to the controller 520 after being shaped by the rectifier unit 5140. Therefore, the "working current of the motor 320" obtained by the current detection unit 510 in the embodiment is a direct current after being shaped by the rectifier unit 5140.

[0036] Specifically, the transformer 5120 is a current transformer, and the transformer 5120 can play the role of electrical isolation. It is not difficult to find here that the branch where the transformer primary side 5121 is located is a strong electric network, and the branch where the transformer secondary side 5123 is located is a weak electric network, and the transformer 5120 plays the role of isolation between the strong electric network and the weak electric network, so as to avoid the controller 520 being directly connected to the strong electric network, so as to ensure the working safety of the controller 520.

[0037] In Figure 3In the illustrated embodiment, the rectifier sub-unit 5140 can be a diode D, with the anode of diode D being the input terminal of the rectifier sub-unit 5140 and the cathode of diode D being the output terminal of the rectifier sub-unit 5140. Of course, the rectifier sub-unit 5140 can also be implemented by a half-bridge rectifier circuit, a full-bridge rectifier circuit, or other circuits; this embodiment does not impose specific limitations.

[0038] In some possible embodiments, the current detection unit 510 may also include a filter subunit 5160, which is connected between the output of the rectifier subunit 5140 and the controller 520. The filter subunit 5160 is used to filter the DC current output by the rectifier subunit 5140 to eliminate noise signals in the DC current, so as to ensure that the controller 520 can obtain the operating current of the motor 320 more accurately.

[0039] exist Figure 3 In the illustrated embodiment, the filter subunit 5160 may include a resistor R1 and a capacitor E. The resistor R1 is connected between the output terminal of the rectifier subunit 5140 and the controller 520. One end of the capacitor E is connected to the common terminal of the resistor R1 and the controller 520, and the other end of the capacitor E is grounded. Therefore, the filter subunit 5160 in this embodiment is an RC filter. The resistor R1 limits the amplitude of the DC current output by the rectifier subunit 5140, making it compatible with the controller 520. The capacitor E is used to filter out noise signals in the DC current. Specifically, the capacitor E may be an electrolytic capacitor, with its positive terminal connected to the common terminal of the resistor R1 and the controller 520, and its negative terminal grounded to improve filtering efficiency.

[0040] In this embodiment, the detection module 50 may further include a protection unit 530, which is connected between the first power supply terminal 512 and the second power supply terminal 514 and the motor 320 to ensure the power supply safety of the motor 320.

[0041] exist Figure 3 In the illustrated embodiment, the protection unit 530 may include a fuse FU. The fuse FU, the primary winding of the mutual inductance 5121, and the motor 320 are connected in series between the first power supply terminal 512 and the second power supply terminal 514. It is used to enter a fuse-breaking state when the AC current in the branch where the motor 320 is located exceeds a specified current value (i.e., a safe current value), thereby cutting off the circuit between the mains power and the motor 320 to ensure the safe operation of the motor 320. Specifically, the fuse FU may be a plug-in fuse, a self-resetting fuse, etc. Specifically, the researchers can determine the specified current value and the specific model of the fuse FU based on the actual operating conditions of the detection module 50.

[0042] exist Figure 3In the illustrated embodiment, the protection unit 530 may further include a varistor RZ, multiple protection resistors R2, and a voltage-stabilizing capacitor C. The varistor RZ is connected between the common terminal of the fuse FU and the primary winding of the mutual inductor 5121 and the second power supply terminal 514, and is used for overvoltage protection (e.g., lightning protection, surge protection, etc.) to ensure the safe operation of the motor 320. Multiple protection resistors R2 are connected in series between the common terminal of the fuse FU and the primary winding of the mutual inductor 5121 and the second power supply terminal 514, and are used for current shunting. Specifically, the researchers can adjust the resistance value and number of protection resistors R2 according to the rated current of the motor 320. The voltage-stabilizing capacitor C is connected between the common terminal of the fuse FU and the primary winding of the mutual inductor 5121 and the second power supply terminal 514, and is used to stabilize the voltage across the motor 320, ensuring stable operation of the motor 320.

[0043] In this embodiment, please refer again. Figure 2 The detection module 50 may further include a temperature detection unit 540, which is disposed on the side of the housing 10 facing the cooking cavity 121 and is used to obtain the heating temperature of the air fryer 100. Figure 2 In this embodiment, the temperature detection unit 540 is located on the side of the pot lid shell 140 facing the cooking cavity 121. In some other possible embodiments, the temperature detection unit 540 may also be located on the side of the pot body shell 120 facing the cooking cavity 121. Specifically, the temperature detection unit 540 may be a thermistor (Negative Temperature Coefficient Thermistor, NTC) temperature sensor, a thermocouple temperature sensor, etc., and the number of temperature detection units 540 may be one or more, which is not specifically limited in this embodiment.

[0044] In this embodiment, the controller 520 is electrically connected to the current detection unit 510 and the temperature detection unit 540, respectively. On one hand, the controller 520 can acquire the operating current of the motor 320 output by the current detection unit 510. Specifically, the controller 520 is configured to: acquire the operating current of the motor 320 in response to the operating command of the air fryer 100; determine whether the operating current is within an abnormal current range; and control the air fryer 100 to stop working if the operating current of the motor 320 is within an abnormal current range.

[0045] On the other hand, the controller 520 can also acquire the heating temperature of the air fryer 100 output by the temperature detection unit 540. Specifically, the controller 520 is further configured to: acquire a first heating temperature and a second heating temperature when the operating current of the motor 320 is in an abnormal current range, wherein the acquisition time of the second heating temperature is later than the acquisition time of the first heating temperature; and control the air fryer 100 to stop working when the temperature difference between the second heating temperature and the first heating temperature is greater than or equal to a preset difference. Specifically, the controller 520 can be a control chip or a microcontroller unit (MCU). The specific working process of the controller 520 is described in detail in the following method embodiments.

[0046] The air fryer 100 in this application uses a current detection unit 510 to detect the operating current of the motor 320. If the operating current of the motor 320 is abnormal (i.e., within an abnormal current range), it indicates a malfunction in the fan module 30 (e.g., no fan blades installed, motor stalled, slow speed, etc.). In this case, the controller 520 will stop the air fryer 100 from operating, thus preventing a fire caused by rapid heating due to internal heat accumulation, ensuring the safe use of the air fryer 100.

[0047] Furthermore, since the working current obtained by the current detection unit 510 can reflect the working status of the motor 320 in a timely manner, the controller 520 can control the air fryer 100 to stop working as soon as the motor 320 fails, thereby improving the product reliability of the air fryer 100.

[0048] It should be noted that in existing air fryers, in order to prevent them from catching fire due to high temperature, a temperature sensor is usually installed to detect the heating temperature inside the cavity, and the air fryer will be powered off when the heating temperature is greater than or equal to the safe temperature.

[0049] However, the inventors of this application discovered that the aforementioned power-off protection mechanism has an excessively slow response time. In other words, the protection mechanism is only triggered when the temperature inside the air fryer reaches a safe level. To avoid false triggering, technicians typically set the safe temperature higher than the air fryer's normal operating temperature, with a certain margin between the two. For example, if the air fryer's normal operating temperature is less than or equal to 200 degrees Celsius, the safe temperature is generally set at 220 degrees Celsius, 250 degrees Celsius, etc. This results in the air fryer continuing to operate during the temperature rise from 200 degrees Celsius to 220 degrees Celsius, increasing the probability of internal components (e.g., motor, circuit board) malfunctioning due to sustained high temperatures.

[0050] To solve the above problems, the inventors of this application discovered through a large amount of fault data that the vast majority of air fryer fires due to high temperature are caused by a malfunction of the internal fan. Because the fan speed cannot reach the preset speed, the heat generated by the heating element cannot be formed into hot air normally, but instead accumulates in the cooking cavity, causing the air fryer to have abnormally high temperature.

[0051] Therefore, the inventors of this application have proposed a technical solution of "setting a current detection unit 510 inside the air fryer to detect the operating current of the motor 320". In the event of an abnormal operating current, the air fryer can be promptly powered off for protection. Because the power-off protection mechanism responds quickly, it can prevent the aforementioned event of "components inside the air fryer malfunctioning due to continuous high temperatures", thus ensuring the lifespan of components (e.g., circuit boards). The control method of the air fryer 100 is described below.

[0052] Please see Figure 4 This illustrates a control method for an air fryer provided in the first embodiment of this application. The method is applied to the air fryer 100 described above. Specifically, the method includes the following processes.

[0053] Step S410: In response to the working command of the air fryer, obtain the working current of the motor.

[0054] In this embodiment, the "air fryer operation command" is used to instruct the controller to start cooking food. As one implementation, the operation command can be triggered by the "cooking start" control on the control panel, indicating a user's need to cook food. The controller responds to this operation command, enters the cooking state, and obtains the motor's operating current. As another implementation, the operation command can be automatically generated by the controller. Specifically, the controller can receive a cooking reservation command, determine the cooking reservation time, and then automatically generate the operation command when the current time arrives at the reserved cooking time. The controller responds to this operation command, enters the cooking state, and obtains the motor's operating current. The cooking reservation command can be triggered by the "cooking reservation" control on the control panel.

[0055] In one implementation, the controller can obtain the motor's operating current through a current detection unit at preset intervals after the air fryer enters the cooking state, enabling the controller to promptly determine the motor's operating status. The preset interval can be a default value in the controller or determined by the developers based on the air fryer's fault detection requirements. Specifically, the more stringent the fault detection requirements of the air fryer, the shorter the preset interval. For example, the preset interval could be 10 seconds, 30 seconds, etc.

[0056] In some possible embodiments, the controller can acquire multiple current sampling values ​​each time it acquires the motor's operating current, and determine the average of the multiple current sampling values ​​as the current operating current of the motor, so as to reduce the influence of noise signals on current detection and ensure the accuracy of current detection.

[0057] Step S415: Determine whether the operating current is in an abnormal current range.

[0058] As one implementation method, researchers can summarize the abnormal current range based on a large amount of test data of the motor. Alternatively, researchers can analyze the hardware circuitry containing the motor, calculate and determine the abnormal current range, and store this range in the air fryer's memory.

[0059] In this embodiment, the controller, upon acquiring the motor's operating current, can determine the abnormal current range by reading relevant data from the memory; subsequently, it determines whether the operating current falls within the abnormal current range. This embodiment does not limit the specific value range of the abnormal current range. Specifically, the abnormal current range can be an open range, a closed range, or a combination of multiple ranges. A detailed description of the abnormal current range is provided in the embodiments below.

[0060] Step S420: If the motor's operating current is in the abnormal current range, control the air fryer to stop working.

[0061] In this embodiment, the motor's operating current and operating state correspond to each other. When the motor's operating current is within the normal current range, it indicates that the motor is in normal working condition; when the motor's operating current is within the abnormal current range, it indicates that the motor is in abnormal working condition. In this case, it means that the motor speed has not reached the preset speed, or even that the motor has stalled. The controller then controls the air fryer to stop working (e.g., by cutting off the power supply to the air fryer) to prevent heat from accumulating inside the air fryer and causing a high-temperature fire.

[0062] Specifically, the normal current range and the abnormal current range can be two complementary ranges. For example, if the normal current range is greater than 0.15A and less than or equal to 1A, the abnormal current range is less than or equal to 0.15A or greater than 1A.

[0063] This embodiment provides a control method for an air fryer. In this method, when the motor's operating current is abnormal (i.e., in the abnormal current range), the controller will control the air fryer to stop working, thereby preventing the air fryer from catching fire due to rapid internal heating and ensuring the safe use of the air fryer.

[0064] Furthermore, since the operating current obtained by the current detection unit can reflect the working status of the motor in a timely manner, the controller can control the air fryer to stop working as soon as the motor fails. For example, it can stop working when the air fryer just starts heating, which can prevent the heat from accumulating in the cavity and damaging the internal components (such as the circuit board or motor), thus ensuring the service life of the components and improving the product reliability of the air fryer.

[0065] Please see Figure 5 This document illustrates a control method for an air fryer according to a second embodiment of this application. In this method, when the motor's operating current is in an abnormal current range, the controller further determines whether a motor malfunction has occurred by monitoring the temperature rise inside the air fryer, ensuring the accuracy of fault detection. Specifically, the method includes the following steps.

[0066] Step S510: In response to the working command of the air fryer, obtain the working current of the motor.

[0067] Step S515: Determine whether the operating current is in the abnormal current range.

[0068] Specifically, the specific implementation of steps S510 and S515 can be found in the relevant descriptions of steps S410 and S415 in the above embodiments, and will not be repeated here.

[0069] Step S520: If the motor's operating current is in the abnormal current range, control the air fryer to stop working.

[0070] In this embodiment, step S520 may include steps S5210 and S5230.

[0071] Step S5210: When the motor's operating current is in the abnormal current range, obtain the first heating temperature and the second heating temperature.

[0072] In this embodiment, the second heating temperature is acquired later than the first heating temperature. Specifically, the time interval between the two acquisition times corresponding to the two heating temperatures is equal to a specified duration, so that there is a temperature difference between the second heating temperature and the first heating temperature. Specifically, the specified duration can be a default value in the controller, or it can be determined by the developers based on the actual working conditions of the air fryer. For example, the specified duration can be 5 seconds, 10 seconds, etc. Taking a specified duration of 5 seconds as an example, after acquiring the first heating temperature, the controller acquires the second heating temperature after a 5-second interval.

[0073] In some possible embodiments, the number of temperature detection units is one. Each time the controller acquires the heating temperature, it can connect to and acquire multiple first temperature sample values ​​corresponding to the temperature detection unit, and determine the average of these multiple temperature sample values ​​as the current heating temperature. This reduces the impact of noise signals on temperature detection and ensures the accuracy of temperature detection.

[0074] In other possible embodiments, there are multiple temperature detection units, which are located at different positions within the cooking cavity. Each time the controller acquires the heating temperature, it can simultaneously acquire multiple second temperature sampling values ​​corresponding to the multiple temperature detection units, and determine the average of these multiple second temperature sampling values ​​as the current heating temperature, so that the determined heating temperature accurately reflects the heating status of the air fryer.

[0075] Step S5230: If the temperature difference between the second heating temperature and the first heating temperature is greater than or equal to a preset difference, control the air fryer to stop working.

[0076] In this embodiment, the preset difference value is the maximum temperature rise that the air fryer can achieve within a specified time period under normal operating conditions. Specifically, the preset difference value can be a default value in the controller, or it can be determined by the R&D personnel based on the actual operating conditions of the air fryer. For example, the preset difference value can be 5 degrees Celsius, 8 degrees Celsius, etc.

[0077] In this embodiment, if the temperature difference between the second heating temperature and the first heating temperature is greater than or equal to a preset difference, it indicates that the air fryer is experiencing an abnormal temperature rise, thus helping to determine if the motor has malfunctioned. The controller then stops the air fryer from operating. For example, with a preset difference of 5 degrees Celsius, a second heating temperature of 40 degrees Celsius, and a first heating temperature of 32 degrees Celsius, the temperature difference is 8 degrees Celsius, causing the air fryer to stop operating.

[0078] In some possible embodiments, step S5220 may be included before step S5230.

[0079] Step S5220: Determine the temperature range in which the second heating temperature is located; determine the preset difference based on the temperature range and the preset difference mapping relationship.

[0080] Because the operating parameters used in an air fryer differ at different cooking stages, the temperature rise varies accordingly. For example, when the heating temperature is between 40 and 80 degrees Celsius, the air fryer is in the heating phase, and the power ratio affects the rapid rise in temperature. Therefore, the preset temperature differences for different cooking stages are not the same.

[0081] In this embodiment, the controller can determine the temperature range containing the second heating temperature. This temperature range can correspond to the cooking stage of the air fryer, or it can be a temperature range independently defined by the developers based on test data of the air fryer. The controller then determines a preset difference based on the temperature range and a preset difference mapping relationship. The difference mapping relationship represents the correspondence between different temperature ranges and different preset differences. Specifically, the difference mapping relationship can be pre-stored in the controller and can be derived by the developers based on a large amount of test data.

[0082] In some possible embodiments, the difference mapping relationship can be a mapping function. In other possible embodiments, the difference mapping relationship can be a difference mapping table. Please refer to Table-1, which schematically illustrates a difference mapping table provided in this embodiment.

[0083] Table 1

[0084] Temperature interval / °C [0,40) [40,80) [80,120) [120,160) [160,200] Pre-set difference / °C 5 4 4.5 5.5 3.5

[0085] Specifically, when the second heating temperature is 30 degrees Celsius, the temperature range of the second heating temperature can be determined to be [0, 40), and then the preset difference value can be determined to be 5 degrees Celsius through Table-1.

[0086] In this embodiment, the controller determines a preset difference that matches the current working state of the air fryer based on the difference mapping relationship, so that the subsequent controller can more accurately determine whether there is an abnormal temperature rise, thus improving the accuracy of anomaly detection.

[0087] In some possible embodiments, steps S5250 and S5270 may be included after step S5210.

[0088] In step S5250, if the temperature difference between the second heating temperature and the first heating temperature is less than a preset difference, the air fryer is controlled to continue working.

[0089] In this embodiment, if the temperature difference between the second heating temperature and the first heating temperature is less than a preset difference, it indicates that there is no abnormal temperature rise inside the air fryer, and that the motor is operating normally. An abnormal detection of the motor's operating current, however, may be caused by a circuit fault in the hardware circuit corresponding to the current detection unit, for example, a component in the circuit (e.g., ...). Figure 3 A short circuit occurs in capacitor E. In this situation, the controller will keep the air fryer running to prevent it from accidentally stopping while the motor is operating normally, thus ensuring smooth cooking.

[0090] Step S5270: Generate a fault record.

[0091] In this embodiment, the fault record is used to characterize a circuit fault in the current detection unit. Specifically, the fault record can be stored in the controller's memory, which helps maintenance personnel quickly locate the faulty hardware during repairs. For example, the content of the fault record could be "At XX time, a circuit fault occurred in the current detection unit".

[0092] In some possible embodiments, fault records may be displayed as prompts on the function panel of the air fryer, or fault records may be sent as text messages to a mobile terminal (e.g., a smartphone) connected to the air fryer to remind the user to repair the air fryer in a timely manner to ensure its normal use.

[0093] This embodiment provides a control method for an air fryer. In this method, when the motor's operating current is in an abnormal current range, the controller will further assist in judging whether the motor has malfunctioned by checking the temperature rise inside the air fryer, so as to ensure the accuracy of motor fault detection.

[0094] Please see Figure 6 This document illustrates a control method for an air fryer according to a third embodiment of this application. In this embodiment, there are multiple abnormal current ranges, and the value ranges of these multiple abnormal current ranges do not overlap. When the controller determines that the motor's operating current is within an abnormal current range, it further determines the specific fault type of the motor based on the specific abnormal current range, so that subsequent maintenance personnel can more efficiently repair the motor. Specifically, the method includes the following processes.

[0095] Step S610: In response to the working command of the air fryer, obtain the working current of the motor.

[0096] Step S615: Determine whether the operating current is in the abnormal current range.

[0097] Step S620: If the motor's operating current is in the abnormal current range, control the air fryer to stop working.

[0098] Specifically, the specific implementation methods of steps S610, S615 and S620 can be found in the relevant descriptions of steps S410, S415 and S420 in the above embodiments, and will not be repeated here.

[0099] In this embodiment, step S630 is included after step S620.

[0100] Step S630: Determine the fault type of the wind turbine module based on the abnormal current range and the preset fault type mapping relationship.

[0101] In this embodiment, the fault type mapping relationship represents the correspondence between different abnormal current ranges and different fault types of wind turbine modules. Specifically, when the abnormal current range is less than or equal to a first specified current value, the fault type of the wind turbine module is no fan blade installed; when the abnormal current range is greater than the first specified current value and less than or equal to a second specified current value, the fault type of the wind turbine module is abnormal fan blade installation (e.g., poor fan blade assembly); when the abnormal current range is greater than a third specified current value, the fault type of the wind turbine module is motor stall, where the third specified current value is greater than the second specified current value.

[0102] Specifically, the fault type mapping relationship can be pre-stored in the controller, which can be derived by R&D personnel based on a large amount of test data. In some possible embodiments, the fault type mapping relationship can be a fault type mapping table. Please refer to Table-2, which schematically shows a fault type mapping table provided in this embodiment. In Table-2, the first specified current value is 0.05A, the second specified current value is 0.15A, the third specified current value is 1A, and I is the operating current of the motor.

[0103] Table 2

[0104] Abnormal current interval / A I≤0.05 0.05<I≤0.15 I>1 Fault type Fan blade not installed Fan blade installation abnormality Motor locked-rotor

[0105] For example, with the motor operating current at 0.03A, the fault type of the fan module can be determined as no fan blades installed based on Table-2.

[0106] In some possible embodiments, the controller can also generate a wind turbine fault record, which is used to characterize a circuit fault in the wind turbine module. Specifically, the wind turbine fault record can be stored in the controller's memory, which helps maintenance personnel quickly locate the faulty hardware during maintenance. For example, the content of the wind turbine fault record could be "At XX time, the wind turbine module motor stalled."

[0107] In some possible embodiments, the fan malfunction record can be displayed as a prompt message on the function panel of the air fryer, or the fan malfunction record can be sent as an SMS to a mobile terminal (e.g., a smartphone) connected to the air fryer to remind the user to repair the air fryer in a timely manner to ensure the normal use of the air fryer.

[0108] This embodiment provides a control method for an air fryer. In this method, when the motor's operating current is in an abnormal current range, the controller will also determine the specific fault type of the motor based on the abnormal current range, so as to improve the maintenance efficiency of maintenance personnel.

[0109] Please seeFigure 7 This diagram illustrates a structural block diagram of a control device 700 for an air fryer according to an embodiment of this application. The control device 700 is applied to the air fryer 100 described above. Specifically, the control device 700 may include a current acquisition module 710, a judgment module 715, and a control module 720. The current acquisition module 710 acquires the operating current of the motor in response to the air fryer's operating command. The judgment module 715 determines whether the operating current is within an abnormal current range. The control module 720 controls the air fryer to stop operating when the motor's operating current is within an abnormal current range.

[0110] In some possible embodiments, the control module 720 is specifically used to acquire a first heating temperature and a second heating temperature when the motor's operating current is in an abnormal current range, wherein the acquisition time of the second heating temperature is later than the acquisition time of the first heating temperature; and to control the air fryer to stop working when the temperature difference between the second heating temperature and the first heating temperature is greater than or equal to a preset difference.

[0111] In some possible embodiments, the control device 700 may further include a record generation module (not shown in the figure). The control module 720 is further configured to control the air fryer to continue operating if the temperature difference between the second heating temperature and the first heating temperature is less than a preset difference. The record generation module is used to generate a fault record, which characterizes a circuit fault in the current detection unit.

[0112] In some possible embodiments, the control device 700 may further include a preset difference determination module (not shown in the figure). Specifically, before the control module 720 stops the air fryer when the temperature difference between the second heating temperature and the first heating temperature is greater than or equal to a preset difference, the preset difference determination module determines the temperature range in which the second heating temperature falls; based on the temperature range and a preset difference mapping table, it determines the preset difference; the difference mapping table represents the correspondence between different temperature ranges and different preset differences.

[0113] In some possible embodiments, there are multiple abnormal current intervals, and the value ranges of the multiple abnormal current intervals do not overlap with each other. The control device 700 may also include a fault type determination module (not shown in the figure). The fault type determination module is used to determine the fault type of the wind turbine module based on the abnormal current intervals and a preset fault type mapping table. The fault type mapping table represents the correspondence between different abnormal current intervals and different fault types of wind turbine modules.

[0114] In some possible embodiments, when the abnormal current range is less than or equal to a first specified current value, the fault type of the fan module is no fan blade installed; when the abnormal current range is greater than the first specified current value and less than or equal to a second specified current value, the fault type of the fan module is abnormal fan blade installation; when the abnormal current range is greater than a third specified current value, the fault type of the fan module is motor stall, where the third specified current value is greater than the second specified current value.

[0115] Those skilled in the art will clearly understand that, for the sake of convenience and brevity, the specific working process of the above-described device and module can be referred to the corresponding process in the foregoing method embodiments, and will not be repeated here.

[0116] In the several embodiments provided in this application, the coupling between modules can be electrical, mechanical, or other forms of coupling.

[0117] Furthermore, the functional modules in the various embodiments of this 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 integrated modules described above can be implemented in hardware or as software functional modules.

[0118] This embodiment provides a control device for an air fryer. In this device, when the motor's operating current is abnormal (i.e., in the abnormal current range), the controller will control the air fryer to stop working, thereby preventing the air fryer from catching fire due to rapid internal heating and ensuring the safe use of the air fryer.

[0119] Furthermore, since the operating current obtained by the current detection unit can reflect the working status of the motor in a timely manner, the controller can control the air fryer to stop working as soon as the motor fails. For example, it can stop working when the air fryer just starts heating, which can prevent the heat from accumulating in the cavity and damaging the internal components (such as the circuit board or motor), thus ensuring the service life of the components and improving the product reliability of the air fryer.

[0120] Please see Figure 8 This illustration shows an air fryer 800 provided in an embodiment of this application. The air fryer 800 may include one or more processors 810, a memory 820, and one or more applications. The one or more applications are stored in the memory 820 and configured to be executed by the one or more processors 810, and are configured to perform the methods described in the above embodiments.

[0121] The processor 810 may include one or more processing cores. The processor 810 connects to various parts of the entire battery management system using various interfaces and lines, and performs various functions and processes data of the battery management system by running or executing instructions, programs, code sets, or instruction sets stored in the memory 820, and by calling data stored in the memory 820. Optionally, the processor 810 may be implemented using at least one hardware form of Digital Signal Processing (DSP), Field-Programmable Gate Array (FPGA), or Programmable Logic Array (PLA). The processor 810 may integrate one or more of the following: Central Processing Unit (CPU), Graphics Processing Unit (GPU), and modem. The CPU primarily handles the operating system, user interface, and applications; the GPU is responsible for rendering and drawing the displayed content; and the modem handles wireless communication. It is understood that the modem may also not be integrated into the processor 810 and may be implemented separately using a communication chip.

[0122] The memory 820 may include random access memory (RAM) or read-only memory (ROM). The memory 820 can be used to store instructions, programs, code, code sets, or instruction sets. The memory 820 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 (e.g., touch functionality, sound playback functionality, image playback functionality, etc.), and instructions for implementing the various method embodiments described above. The data storage area may also store data created during the use of the electronic device (e.g., phonebook, audio / video data, chat log data, etc.).

[0123] Please see Figure 9 The illustration shows a computer-readable storage medium 900 provided in an embodiment of this application, which stores computer program instructions 910 that can be invoked by a processor to execute the methods described in the above embodiments.

[0124] The computer-readable storage medium 900 may be, for example, flash memory, electrically erasable programmable read-only memory (EEPROM), electrically programmable read-only memory (EPROM), hard disk, or read-only memory (ROM). Optionally, the computer-readable storage medium 900 includes a non-transitory computer-readable storage medium. The computer-readable storage medium 900 has storage space for computer program instructions 910 that perform any of the method steps described above. These computer program instructions 910 may be read from or written to one or more computer program products.

[0125] In this application specification, certain terms are used to refer to specific modules. Those skilled in the art will understand that hardware manufacturers may use different terms to refer to the same module. The specification and claims do not distinguish modules based on differences in name, but rather on differences in function. The term "comprising" throughout the specification and claims is an open-ended term and should be interpreted as "including but not limited to"; "generally" means that those skilled in the art can solve the technical problem within a certain margin of error and basically achieve the technical effect.

[0126] In this application, unless otherwise expressly specified or limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or merely surface contact. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0127] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0128] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0129] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions 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 this application.

Claims

1. An air fryer, characterized in that, include: The shell has a cooking cavity; A fan module includes a motor and fan blades. The motor is disposed inside the housing, and the fan blades are connected to the motor and are positioned toward the cooking cavity. as well as A detection module is disposed within the housing. The detection module includes a current detection unit and a controller. The current detection unit is connected between the motor and the controller and is used to detect the operating current of the motor. The controller is configured to: in response to the working command of the air fryer, acquire the operating current of the motor; determine whether the operating current is in an abnormal current range; and control the air fryer to stop working if the operating current of the motor is in the abnormal current range.

2. The air fryer according to claim 1, characterized in that, The detection module further includes a temperature detection unit, which is disposed on the side of the housing facing the cooking cavity and electrically connected to the controller; the temperature detection unit is used to obtain the heating temperature of the air fryer; The controller is further configured to: when the operating current of the motor is in the abnormal current range, acquire a first heating temperature and a second heating temperature, wherein the acquisition time of the second heating temperature is later than the acquisition time of the first heating temperature; and control the air fryer to stop working when the temperature difference between the second heating temperature and the first heating temperature is greater than or equal to a preset difference.

3. The air fryer according to claim 1, characterized in that, The current detection unit is provided with a first power supply terminal and a second power supply terminal suitable for connection to the mains power supply, and the current detection unit includes a current transformer and a rectifier subunit. The current transformer includes a coupled primary winding and a secondary winding, and the primary winding is connected in series with the motor and then connected between the first power supply terminal and the second power supply terminal. One end of the mutual inductance secondary side is connected to the input terminal of the rectifier subunit, the other end of the mutual inductance secondary side is grounded, and the output terminal of the rectifier subunit is connected to the controller.

4. The air fryer according to claim 3, characterized in that, The current detection unit further includes a filtering subunit, which includes a resistor and a capacitor. The resistor is connected between the output terminal of the rectifier subunit and the controller; one end of the capacitor is connected to the common terminal of the resistor and the controller, and the other end of the capacitor is grounded.

5. The air fryer according to any one of claims 1 to 4, characterized in that, The air fryer also includes an electromagnetic heating element, which drives the fan blades to heat.

6. A method for controlling an air fryer, characterized in that, The air fryer includes a fan module and a detection module; wherein, the fan module includes a motor and fan blades connected by a drive; the detection module includes a current detection unit and a controller, the current detection unit being connected between the motor and the controller; the method includes: In response to the working command of the air fryer, the operating current of the motor is obtained; Determine whether the operating current is within the abnormal current range; If the motor's operating current is within the abnormal current range, the air fryer will be controlled to stop working.

7. The method according to claim 6, characterized in that, The detection module further includes a temperature detection unit electrically connected to the controller; the step of controlling the air fryer to stop working when the motor's operating current is in an abnormal current range includes: When the operating current of the motor is in the abnormal current range, a first heating temperature and a second heating temperature are obtained, wherein the second heating temperature is obtained later than the first heating temperature. If the temperature difference between the second heating temperature and the first heating temperature is greater than or equal to a preset difference, the air fryer is controlled to stop working.

8. The method according to claim 7, characterized in that, The method further includes: If the temperature difference between the second heating temperature and the first heating temperature is less than the preset difference, the air fryer is controlled to continue working. A fault record is generated, which is used to characterize a circuit fault in the current detection unit.

9. The method according to claim 7, characterized in that, Before controlling the air fryer to stop working when the temperature difference between the second heating temperature and the first heating temperature is greater than or equal to a preset difference, the method further includes: Determine the temperature range in which the second heating temperature is located; determine the preset difference based on the temperature range and the preset difference mapping relationship; the difference mapping relationship represents the correspondence between different temperature ranges and different preset differences.

10. The method according to claims 6 to 9, characterized in that, The number of abnormal current intervals is multiple, and the value ranges of the multiple abnormal current intervals do not overlap with each other. The method further includes: Based on the abnormal current range and the preset fault type mapping relationship, the fault type of the wind turbine module is determined; the fault type mapping relationship represents the correspondence between different abnormal current ranges and different fault types of wind turbine modules.

11. The method according to claim 10, characterized in that, When the abnormal current range is less than or equal to the first specified current value, the fault type of the fan module is that the fan blades are not installed; When the abnormal current range is greater than the first specified current value and less than or equal to the second specified current value, the fault type of the fan module is abnormal fan blade installation. If the abnormal current range is greater than the third specified current value, the fault type of the fan module is motor stall, and the third specified current value is greater than the second specified current value.

12. A control device for an air fryer, characterized in that, The air fryer includes a fan module and a detection module; wherein, the fan module includes a motor and fan blades connected by a drive; the detection module includes a current detection unit and a controller, the current detection unit being connected between the motor and the controller; the device includes: A current acquisition module is used to acquire the operating current of the motor in response to the working command of the air fryer; The judgment module is used to determine whether the operating current is in an abnormal current range; The control module is used to control the air fryer to stop working when the operating current of the motor is in an abnormal current range.

13. An air fryer, characterized in that, include: One or more processors; Memory; as well as One or more applications, wherein the one or more said applications are stored in the memory and configured to be executed by one or more said processors, and configured to perform the method as described in any one of claims 6 to 11.

14. A computer-readable storage medium, characterized in that, The computer-readable storage medium stores computer program instructions that can be invoked by a processor to perform the method as described in any one of claims 6 to 11.

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