A cooking appliance for safe cooking and its cooking method

Abstract

The present invention relates to a cooking appliance for safe cooking, which comprises a main body and a container assembly. The container assembly includes a heating container and a container lid buckled on the heating container. The main body is further provided with a lid detection structure for detecting whether the container lid is buckled in place, a locking structure for locking the container lid, a lid closing detection structure for detecting the opening / locking of the locking structure, and an anti-overflow structure for preventing the food ingredients in the container assembly from overflowing. The present invention also relates to a cooking method, which determines whether it is necessary to detect whether the container lid is buckled in place and / or determines whether it is necessary to lock / open the locking structure according to the recipe type. Since the cooking scenarios generated by different recipe types are different, the present invention provides an accurate control and processing method for the container lid and the locking structure for each recipe, which can not only ensure the simplicity, smoothness and practicability of cooking, but also ensure the safety of user operation.

Description

Technical Field

[0001] The present invention belongs to the technical field of kitchen appliances, and particularly relates to a cooking appliance for safe cooking and a cooking method thereof. Background Art

[0002] A stir-fry machine is a new generation of intelligent cooking equipment controlled by a microcomputer. The equipment is mainly convenient and has simple operation without fumes. The stir-fry machine can not only automatically feed materials, season, stir-fry, control temperature, clean, and take out the cooked food, but also has functions of stir-frying, frying, cooking, deep-frying, exploding, braising, steaming, boiling, baking, stewing, and cooking in one pot, easily realizing the automation and fun of the cooking process. During the working process of the stir-fry machine, due to different cooking modes, some recipes require the lid to be strictly closed, some recipes do not require the lid to be closed, and some recipes do not even require the use of a lid. However, the existing stir-fry machines do not implement different control means for different recipes and different cooking scenarios, resulting in a cumbersome, discontinuous, and less practical cooking process.

[0003] Therefore, based on these problems, it is of great practical significance to provide a cooking appliance and a cooking method thereof that can not only ensure the simplicity, smoothness, and practicality of cooking, but also ensure the safety of user operation. Summary of the Invention

[0004] The present invention provides a cooking appliance and a cooking method thereof that can not only ensure the simplicity, smoothness, and practicality of cooking, but also ensure the safety of user operation to solve the problems existing in the above-mentioned prior art.

[0005] The technical solution adopted by the present invention to solve this problem is as follows:

[0006] A cooking appliance for safe cooking includes a main body and a container assembly. The container assembly includes a heating container and a container lid buckled on the heating container. The main body is also provided with a lid detection structure for detecting whether the container lid is buckled in place, a locking structure for locking the container lid, a lid closing detection structure for detecting the opening / locking of the locking structure, and an anti-overflow structure for preventing the ingredients in the container assembly from overflowing.

[0007] Preferably, the main body includes:

[0008] A main body housing, which is internally equipped with a motor control unit for adjusting the stirring speed in the container assembly and a heating control unit for adjusting the heating temperature in the container assembly. Handle shells and control shells are respectively fixedly connected to both sides of the main body housing. Lid closing gaps for inserting the container lid are respectively formed between the handle shells, the control shells and the container assembly. A main control unit for controlling the operation of the cooking appliance is assembled in the control shell;

[0009] The installation housing is assembled on the main body housing, and a container assembly space for fitting and installing a heating container is formed therein.

[0010] Further preferably, a display screen assembly is rotatably connected to the control housing through a rotating shaft, and an angle adjustment assembly for adjusting the opening angle of the display screen assembly is connected between the display screen assembly and the control housing.

[0011] Further preferably, the cooking appliance is further provided with an induction lifting structure for detecting whether someone is approaching and controlling the opening / retraction of the display screen assembly.

[0012] Further preferably, the motor control unit includes a switched reluctance motor assembled in the main body housing, the heating control unit includes a coil disc structure assembled on the upper part of the main body housing and a coil group arranged in the coil disc structure, an arc-shaped hollow heating space is formed between the heating container and the coil disc structure, and the motor control unit and the heating control unit are respectively electrically connected to the main control unit.

[0013] Further preferably, 2-6 temperature sensing elements are uniformly arranged on the coil disc structure along its circumferential direction, and the temperature sensing elements are telescopically and penetratingly assembled on the coil disc structure.

[0014] Further preferably, the outer wall of the container cover is bent outward and downward at least once to form at least one layer of annular stepped surface structure of the container cover clamping wall.

[0015] Further preferably, the lid detection structure includes a lid detection switch, and the lid detection switch includes a safety link, a fixed bracket and an induction structure installed on the fixed bracket. When the container cover is buckled in place, the safety link triggers the induction structure.

[0016] Further preferably, the lid detection structure further includes a Hall device, the Hall device is arranged in the handle housing and / or the control housing, and a magnetic material is installed in the container cover.

[0017] Further preferably, the locking structure includes a gearbox structure, a PCB fixing plate arranged on the upper surface of the gearbox structure, and a lock catch structure that is slidably matched with the gearbox structure and can move forward / backward relative to the gearbox structure. A driving structure for driving the lock catch structure to move forward / backward is arranged in the gearbox structure.

[0018] Further preferably, the driving structure includes a rack formed at the lower end of the lock catch structure and arranged along the length direction of the lock catch structure, a gear meshing with the rack, and a lock catch motor drivingly connected to the gear.

[0019] Further preferably, the gearbox structure is disposed within the handle housing and / or the control housing, and an opening for the locking structure to extend / retract is formed on one side of the handle housing and / or the control housing facing the lid closing gap.

[0020] Further preferably, the lid closing detection structure includes a current detection structure. The number of the current detection structures is the same as that of the locking structures. The current detection structure includes a motor drive chip, and the motor drive chip is electrically connected to the locking motor and the main control unit respectively.

[0021] Further preferably, the lid closing detection structure further includes a photoelectric detection structure. The number of the photoelectric detection structures is the same as that of the locking structures and is disposed on the PCB fixing plate. The photoelectric detection structure includes a photoelectric gate control board, a shielding member, and at least one photoelectric detection member. The photoelectric gate control board is electrically connected to the photoelectric detection member and the main control unit respectively.

[0022] Further preferably, the photoelectric detection member includes a transmitting end and a receiving end which are oppositely disposed on both sides of the strip-shaped through groove. The shielding member is fixed on the upper surface of the locking structure. When the shielding member enters the triggering area between the transmitting end and the receiving end of the photoelectric detection member along with the locking structure, the photoelectric detection member emits a signal.

[0023] Further preferably, the number of photoelectric detection members on each locking structure is two, including a first photoelectric detection member (photoelectric detection 1) and a second photoelectric detection member (photoelectric detection 2). The two photoelectric detection members are respectively located at the front and rear positions of the strip-shaped through groove.

[0024] Further preferably, the lid closing detection structure further includes a contact detection structure, and the contact detection structure includes:

[0025] Detection contacts, which are disposed on the locking structure, and the number thereof is the same as that of the locking structures. The detection contacts are disposed on the side surfaces of each locking structure in contact with the container lid clamping wall in a one-to-one correspondence;

[0026] A conduction structure, which is in a closed ring structure and is embedded along the contour of the container lid clamping wall on the side surface in contact with the locking structure;

[0027] When the locking structure is locked on the container lid, the detection contacts on the locking structure are in contact with the conduction structure.

[0028] Further preferably, the anti-overflow structure includes an anti-overflow detection element for detecting the gas pressure in the container assembly and a heating control unit for adjusting the heating temperature in the container assembly.

[0029] Further preferably, the anti-overflow structure further includes a touch detection element and a touch chip disposed at the top outside of the container component. An insulating layer is embedded in the inner wall of the container component. When the liquid food material in the container component reaches or exceeds the detection liquid level of the touch detection element, a capacitance effect is generated between the touch detection element and the liquid food material, and a signal is transmitted to the touch chip.

[0030] Further preferably, the number of the touch detection elements is at least two, and they are sequentially distributed at different height positions on the outside of the container component from bottom to top.

[0031] Further preferably, an oil fume detection structure for detecting the amount of oil fume and controlling the oil fume is provided in the cooking appliance.

[0032] Further preferably, a shaking detection structure for detecting the amount of body shaking and controlling the body shaking is provided in the cooking appliance.

[0033] The second object of the present invention is to provide a cooking method for a cooking appliance for safe cooking, which includes the following steps:

[0034] Step 1: Insert the heating container into the container assembly space of the installation housing, install the installation housing on the main body, connect the cooking appliance to the power supply, and prepare for cooking;

[0035] Step 2: Put each food material into the heating container, select a cooking mode through the display screen assembly and send it to the main control unit, and the main control unit determines the recipe type;

[0036] Step 3: According to the recipe type, determine whether it is necessary to detect whether the container lid is buckled in place and / or determine whether it is necessary to lock / open the locking structure;

[0037] Step 4: If it is necessary to detect whether the container lid is buckled in place, detect whether the container lid is buckled in place through the lid detection structure, and send the detection signal to the main control unit;

[0038] If it is necessary to lock / open the locking structure, detect the state of the locking structure through the lid closing detection structure, and send the detection signal to the main control unit, and the main control unit controls the locking structure to lock / open;

[0039] Step 5: After the detection is completed, start the stirring function of the stirring component in the container component through the motor control unit and control the stirring speed, and / or start the heating function of the coil group in the coil disc structure through the heating control unit and control the heating power to start cooking.

[0040] Preferably, the determination criterion of the recipe type in step 2 is based on whether the stirring function, the stirring speed and the heating function are started in different cooking modes. The recipe types include:

[0041] Recipe type A, start the stirring function with a stirring speed greater than 2 gears;

[0042] Recipe type B, start the stirring function with a stirring speed less than or equal to 2 gears, and start the heating function;

[0043] Recipe type C, only start the heating function without starting the stirring function.

[0044] Further preferably, step 3 further includes:

[0045] Step 3.1: Classify according to the recipe type, determine whether the current recipe type is recipe type A. If so, continue to execute step 3.2; if not, execute step 3.4;

[0046] Step 3.2: First, judge whether the container lid is properly fastened through the lid detection structure. If so, continue to execute step 3.3; if not, prompt that the container lid is not placed and repeat step 3.2;

[0047] Step 3.3: Then judge whether the locking structure is locked through the lid closing detection structure. If so, the detection is completed and cooking starts; if not, control the locking structure to lock and repeat step 3.3;

[0048] Step 3.4: Classify according to the recipe type, determine whether the current recipe type is recipe type B. If so, continue to execute step 3.5; if not, execute step 3.7;

[0049] Step 3.5: First, judge whether the container lid is properly fastened through the lid detection structure. If so, continue to execute step 3.6; if not, prompt that the container lid is not placed and repeat step 3.5;

[0050] Step 3.6: Then judge whether the locking structure is opened through the lid closing detection structure. If so, the detection is completed and cooking starts; if not, control the locking structure to open and repeat step 3.6;

[0051] Step 3.7: Classify according to the recipe type, determine whether the current recipe type is recipe type C. If so, continue to execute step 3.8;

[0052] Step 3.8: Judge whether the locking structure is opened through the lid closing detection structure. If so, the detection is completed and cooking starts; if not, control the locking structure to open and repeat step 3.8.

[0053] The advantages and positive effects of the present invention are:

[0054] 1. The present invention protects the safety of closing the lid by jointly applying the lid detection structure, the locking structure and the lid closing detection structure, ensuring that the container lid is effectively closed during the cooking process of the whole machine, avoiding unnecessary harm to users, and greatly reducing the probability of mechanical danger.

[0055] 2. In the present invention, multiple types of lid detection structures are used together to determine whether the container lid is properly fastened, with accurate determination, thereby improving the overall safety performance on the premise of preventing the product from starting up by mistake.

[0056] 3. In the present invention, multiple types of lid closing detection structures are used together to detect the opening / locking of the locking structure and determine whether the locking structure is locked in place, with accurate determination, thereby improving the overall safety performance on the premise of preventing the product from starting up by mistake.

[0057] 4. In the present invention, multiple types of anti-overflow structures are used together to prevent the food ingredients in the container assembly from overflowing, with accurate determination, thereby improving the overall safety performance on the premise of preventing the product from starting up by mistake.

[0058] 5. On the premise of ensuring the safety of user operation, the present invention can also ensure the uniform heating of food, improve the shaking of the body, effectively prevent and control oil fumes, and automatically sense the display screen, thereby improving the cooking effect and the user experience while improving the cooking effect.

[0059] 6. Since the cooking scenarios generated by different recipe types in the present invention are different, corresponding accurate control and processing methods for the container lid and the locking structure are provided for each recipe, which can not only ensure the simplicity, fluency and practicability of cooking, but also ensure the safety of user operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0060] The technical solutions of the present invention will be further described in detail below in conjunction with the drawings and embodiments. However, it should be understood that these drawings are only designed for explanatory purposes and therefore do not limit the scope of the present invention. In addition, unless otherwise specified, these drawings are only intended to conceptually illustrate the structural configurations described herein and are not necessarily drawn to scale.

[0061] Figure 1 is a schematic structural diagram of the cooking appliance in the present invention;

[0062] Figure 2 is a schematic side sectional view of the cooking appliance with the container lid fastened;

[0063] Figure 3 is Figure 2 an enlarged structural view of part B in

[0064] Figure 4 is a schematic side sectional view of the cooking appliance with the container lid not fastened;

[0065] Figure 5 is Figure 4 an enlarged structural view of part C in

[0066] Figure 6It is the circuit schematic diagram between the induction structure and the main control unit;

[0067] Figure 7 It is the schematic diagram of the partial enlarged structure of the Hall device part;

[0068] Figure 8 It is the circuit schematic diagram of the Hall device;

[0069] Figure 9 It is the schematic diagram of the structure of the host;

[0070] Figure 10 It is the circuit schematic diagram of the four-channel NTC temperature sampling circuit;

[0071] Figure 11 It is the schematic diagram of the structure in the assembled state of the locking structure, the photoelectric detection structure, and the current detection structure;

[0072] Figure 12 It is the circuit schematic diagram between the lid inspection switch, the photoelectric detection structure, the current detection structure and the main control unit;

[0073] Figure 13 It is the circuit schematic diagram of the main control unit;

[0074] Figure 14 It is the working flow chart of the locking of the buckle structure;

[0075] Figure 15 It is the working flow chart of the opening of the buckle structure;

[0076] Figure 16 It is the circuit schematic diagram of the pressure sensor strain gauge bridge circuit;

[0077] Figure 17 It is the circuit schematic diagram of the AD sampling circuit;

[0078] Figure 18 It is the circuit schematic diagram of the detection contact;

[0079] Figure 19 It is the schematic diagram of the sectional structure of the cooking appliance in the present invention;

[0080] Figure 20 It is Figure 19 the schematic diagram of the enlarged structure of part A in;

[0081] Figure 21 It is the schematic diagram of the sectional structure in the assembled state of the control shell and the display screen assembly in the present invention;

[0082] Figure 22 It is the schematic diagram of the half-section structure of the angle adjustment component;

[0083] Figure 23 It is the circuit schematic diagram of the infrared proximity sensing element;

[0084] Figure 24 is the circuit schematic diagram of the driving motor driving chip;

[0085] Figure 25 is the half-sectional structure schematic diagram of the installation housing;

[0086] Figure 26 is the circuit schematic diagram of the touch detection element and the touch chip;

[0087] Figure 27 is the working flowchart of the cooking method in the present invention.

[0088] In the figure: 1. heating container, 2. container lid, 3. main body housing, 4. switched reluctance motor, 5. handle housing, 6. control housing, 7. lid closing gap, 8. display screen assembly, 9. installation housing, 10. container lid clamping wall, 11. sealing ring, 12. gearbox structure, 13. locking structure, 1301. support body, 1302. locking body, 1303. sliding body, 14. rack, 15. gear, 16. locking motor, 17. PCB fixing plate, 18. strip-shaped through groove, 19. stirring structure, 20. upper clutch, 21. lower clutch, 22. coil disc structure, 23. lid detection switch, 2301. fixing bracket, 2302. safety connecting rod, 2303. induction groove, 2304. optoelectronic switch circuit board, 2305. protective sleeve, 24. motor driving chip, 25. optoelectronic door control board, 26. shielding member, 2701. first optoelectronic detection member, 2702. second optoelectronic detection member, 28. Hall device, 29. magnetic strip, 30. detection contact, 31. conduction structure, 32. anti-overflow detection element, 33. temperature sensing element, 34. touch detection element, 35. oil fume detection element, 36. shaking detection element, 37. angle adjustment assembly, 3701. angle adjustment gearbox, 3702. driving rack, 3703. driving gear, 3704. driving motor, 38. transmitting and receiving channel hole. Detailed implementation manners

[0089] First of all, it should be noted that the following will specifically illustrate the specific structure, characteristics and advantages of the present invention by way of examples. However, all the descriptions are only for the purpose of explanation and should not be construed as any limitation to the present invention. In addition, any single technical feature described or implied in each of the embodiments mentioned in this article, or any single technical feature shown or implied in each of the drawings, can still be arbitrarily combined or deleted between these technical features (or their equivalents) to obtain more other embodiments of the present invention that may not be directly mentioned in this article. Additionally, for the sake of simplifying the drawings, the same or similar technical features may only be labeled at one place in the same drawing.

[0090] In the present invention, unless otherwise clearly specified and defined, terms such as "installation", "setting", "connection", "fixation", "rotation connection", etc. should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium. It can be the communication inside two components or the interaction relationship between two components. Unless otherwise clearly defined, for those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances. The present invention will be specifically described below with reference to the accompanying drawings.

[0091] Embodiment 1:

[0092] A cooking appliance for safe cooking. Taking a stir-fry machine as an example, it includes a main body and a container assembly. The container assembly includes a heating container 1 and a container lid 2 buckled on the heating container 1. The main body is also provided with a lid detection structure for detecting whether the container lid 2 is buckled in place, a locking structure for locking the container lid 2, a lid closing detection structure for detecting the opening / locking of the locking structure, and an anti-overflow structure for preventing the food ingredients in the container assembly from overflowing.

[0093] Working principle: In this technical solution, the lid detection structure is used to detect whether the container lid 2 is buckled in place, the locking structure is used for locking / unlocking the container lid 2, the lid closing detection structure is used to detect the open / locked state of the locking structure and whether the locking structure is locked in place when the locking structure is in the locked state, and the anti-overflow structure is used to prevent the food ingredients in the container assembly from overflowing. For different recipe types in this stir-fry machine, different cooking scenarios are generated, and accurate control and safe processing methods for the container lid and the locking structure are corresponding to each recipe, which can not only ensure the simplicity, smoothness and practicability of cooking, but also ensure the safety of user operation.

[0094] Furthermore, it can also be considered in this embodiment that the main body includes:

[0095] A main body housing 3, which is internally equipped with a motor control unit for adjusting the stirring speed in the container assembly and a heating control unit for adjusting the heating temperature in the container assembly. Handles 5 and a control housing 6 are respectively fixed on both sides of it. Lid closing gaps 7 for inserting the container lid 2 are respectively formed between the handle housing 5, the control housing 6 and the container assembly. A main control unit for controlling the operation of the cooking appliance is assembled in the control housing 6. The main control unit includes a PCB board and a micro control unit MCU. The micro control unit MCU can but is not limited to use a chip with the model of STM32G070CB;

[0096] An installation housing 9, which is assembled on the main body housing 3, and a container assembly space for matching and installing the heating container 1 is formed inside it. The installation housing 9, the heating container 1 and the container lid 2 together constitute the container assembly.

[0097] Furthermore, it can also be considered in this embodiment that a display screen assembly 8 is rotatably connected to the control shell 6 through a rotating shaft. The electronic board of the display screen assembly 8 is electrically connected to the micro control unit MCU. The cooking parameters can be selected through the display screen assembly, the rising angle of the display screen can be preset and displayed. An angle adjustment assembly 37 for adjusting the opening angle of the display screen assembly 8 is connected between the display screen assembly 8 and the control shell 6.

[0098] Furthermore, it can also be considered in this embodiment that the angle adjustment assembly 37 includes:

[0099] An angle adjustment gearbox 3701, which is assembled in the plane of the control shell 6 facing the display screen assembly 8;

[0100] A driving rack 3702, which is an arc-shaped structure with the center of the circle falling on the central axis of the rotating shaft. One end of it is connected to the display screen assembly. The driving rack 3702 can move within the angle adjustment gearbox 3701 along its radian, so that the display screen assembly rotates and opens or rotates back to the control shell 6 with the rotating shaft as the axis;

[0101] A driving gear 3703, which is rotatably assembled in the angle adjustment gearbox 3701 and meshes with the driving rack 3702. When the driving gear in the angle adjustment gearbox rotates forward or backward, the driving rack can move back and forth within the angle adjustment gearbox along its radian. And because the center of the circle of the driving rack falls on the central axis of the rotating shaft, the display screen assembly is indirectly driven by the driving gear and the driving rack to rotate on the control shell with the rotating shaft as the axis, which is convenient for the user to adjust the tilt angle of the display screen assembly according to his own height and visual angle.

[0102] It should be noted that the specific structure and circuit structure of the display screen assembly involved in this embodiment are all prior arts, so they will not be elaborated in detail.

[0103] Furthermore, in this embodiment, it can also be considered that the cooking appliance is also provided with an induction lifting structure for detecting whether someone is approaching and controlling the display screen assembly 8 to open / retract. The induction lifting structure senses whether someone is approaching the cooking machine. After detecting that someone is approaching, the display screen assembly is raised to a preset angle by driving the motor 3704 and the angle adjustment assembly 37, wherein: the raised angle can be customized by the user, and the user can adjust the raised angle of the display screen assembly according to different usage scenarios during use, and when the cooking machine is not working and detects that no one is in front of the cooking machine for a certain period of time, the internal display screen assembly is automatically retracted to save storage space. This technical solution has a simple structure, and the display screen assembly automatically rises and wakes up when someone approaches, which is more intelligent and energy-saving. When the device is not in operation, it can be automatically retracted to save space. In addition, the raised angle of the display screen assembly can be adjusted according to different usage scenarios to provide a better viewing experience and improve the user experience.

[0104] Furthermore, in this embodiment, it can also be considered that the induction lifting structure includes an infrared proximity sensing element mounted on the display screen assembly, a drive motor 3704 mounted on the angle adjustment gear box 3701 and connected to the drive gear transmission, and a drive motor driving chip for controlling the operation of the drive motor 3704, the output end of the infrared proximity sensing element is electrically connected to the main control unit, and the output end of the main control unit is electrically connected to the drive motor driving chip.

[0105] Furthermore, in this embodiment, it can be considered that the infrared proximity sensing element includes an infrared proximity sensing sensor and a sensor circuit board, the infrared proximity sensing sensor includes an infrared transmitting tube and an infrared receiving tube, and the display screen assembly 8 is provided with transmitting and receiving channel holes 38 corresponding to the infrared transmitting tube and the infrared receiving tube on the plane facing away from the control shell 6. The infrared transmitting tube can continuously emit infrared rays outward, and when the infrared light emitted by the infrared transmitting tube is blocked by a hand or a human body, it will be reflected to the infrared receiving tube.

[0106] like Figure 23 The circuit schematic diagram of the infrared proximity sensing element is shown, wherein: U2 is an infrared pair tube (infrared proximity sensing sensor), U1 is an operational amplifier circuit, the infrared transmitting tube can continuously emit infrared rays, when the hand or human body is close enough to the front of the display screen, the infrared light emitted by the infrared transmitting tube is blocked by the hand or human body and reflected back to the infrared receiving tube, at this time, after detecting that someone is approaching, the OUT (signal output port of the infrared proximity sensing element) of the infrared proximity sensing circuit outputs a high level, the signal output port of the infrared proximity sensing element is connected to the 13th pin (PA2) of the main control unit, and outputs a detection signal of someone to the main control unit; when the hand or human body leaves the front of the display screen, the infrared receiving tube cannot receive the infrared signal, the OUT (signal output port of the infrared proximity sensing element) of the infrared proximity sensing element outputs a low level, and outputs a detection signal of no one to the main control unit;

[0107] As shown Figure 24 in the circuit schematic diagram of the drive motor drive chip, where: U2 is a Darlington current amplification chip, preferably with the model ULN2003, CN1 is a stepper motor interface, the 4th, 5th, 6th, and 7th pins (STEPA, STEPB, STEPC, STEPD drive input ports) of the drive motor drive chip are motor drive input ports, the 4th, 5th, 6th, and 7th pins (STEPA, STEPB, STEPC, STEPD drive input ports) of the drive motor drive chip are respectively connected to the 31st, 30th, 29th, and 28th pins (PC7, PC6, PA9, PA8 ports) of the main control unit, the 13th, 12th, 11th, and 10th pins (STEPA, STEPB, STEPC, STEPD drive output ports) of the drive motor drive chip are motor drive output ports, and the 13th, 12th, 11th, and 10th pins (STEPA, STEPB, STEPC, STEPD drive output ports) of the drive motor drive chip are respectively connected to the 3704 motor interface of the drive motor. That is, when a hand or a human body approaches close enough in front of the display screen, the infrared light emitted by the infrared emitting tube is blocked by the hand or the human body and reflected back to the infrared receiving tube. The OUT of the infrared proximity sensing circuit outputs a high level to the main control unit, and the main control unit can control the drive motor to rotate forward through the drive motor drive chip to raise the display screen to a preset angle; when the hand or the human body leaves in front of the display screen, the infrared receiving tube cannot receive the infrared signal, and the OUT of the infrared proximity sensing element outputs a low level to the main control unit. The main control unit can control the drive motor to reverse through the drive motor drive chip to retract the display screen.

[0108] Furthermore, it can also be considered in this embodiment that the drive motor 3704 is a 4-phase 8-beat stepper motor. The STEPA, STEPB, STEPC, and STEPD drive output ports of the drive motor drive chip are respectively connected to the A, B, C, and D phases of the drive motor. The power-on sequence for the forward rotation of the drive motor is: AC -> C -> BC -> B -> BD -> D -> AD - A. The power-on sequence for the reverse rotation of the drive motor is opposite to that of the forward rotation. When the drive motor needs to be locked when it stops rotating, power is continuously supplied according to the power-on phase sequence at the stop moment to make the drive motor in a locked state. That is, first, the number of pulses required for the drive motor to reach the preset angle is calculated through the angle. After the drive motor reaches the preset number of pulses, the current drive phase is continuously powered to lock the display screen at the current position to prevent the display screen from being pushed back due to pressing during operation; when the power is off, the drive motor is no longer locked, and the display screen can be manually retracted or the opening angle can be manually adjusted to improve the practicality of use.

[0109] It should be noted that the main control unit is equipped with a CPU that can store and record personal set positions. When powering on and off, setting to the personal position, the next time the main control unit can move to the previous preset position by driving the motor.

[0110] Furthermore, it can also be considered in this embodiment that the motor control unit includes a switched reluctance motor 4 assembled in the main body housing 3, the heating control unit includes a coil disk structure 22 assembled on the upper part of the main body housing and a coil group arranged in the coil disk structure 22. The coil disk structure 22 is an arc disk body structure with open opposite end faces. When a heating container 1 is placed, the coil group is energized to generate an electromagnetic heating method. The coil group is electrically connected to the micro control unit MCU. An arc-shaped hollow heating space is formed between the heating container 1 and the coil disk structure 22. The hot air in the arc-shaped hollow heating space is conducted to the heating container 1, making the temperature of the inner wall of the heating container 1 more uniform, with a wide heating area and good heat uniformity. The switched reluctance motor 4 is electrically connected to the micro control unit MCU.

[0111] Furthermore, it can also be considered in this embodiment that 2-6 temperature sensing elements 33 are evenly arranged along the circumferential direction of the coil disk structure. The temperature sensing elements 33 are assembled on the coil disk structure in a telescopic manner. As Figures 9 - 10 shown, preferably, the number of temperature sensing elements 33 is four, evenly distributed around the center position of the coil disk structure 22. A resilient structure for controlling the up and down movement of the temperature sensing element 33 at the working height is also sleeved on the temperature sensing element 33 located below the coil disk structure 22. The resilient structure can be but is not limited to a return spring. The temperature sensing element 33 can change its own working height according to the height of the bottom of the heating container, which can not only achieve more accurate temperature detection, but also has high flexibility, facilitating better temperature detection when replacing other heating containers on the installation housing.

[0112] Furthermore, it can also be considered in this embodiment that a temperature sensor is provided on the temperature sensing part of each temperature sensing element 33. The temperature sensing part of the temperature sensing element 33 extends into the arc-shaped hollow heating space. Each temperature sensor is electrically connected to the main control unit respectively. The four temperature sensors can sample the temperatures around the bottom wall of the heating container. As Figure 10As shown, the circuit is a four-way NTC temperature sampling circuit. N1, N2, N3, and N4 are connected to four-way temperature sensors. The preferred temperature sensor model is: MJRA-104-3688-T220, R25℃=100KΩB25℃ / 50℃=3688 (accuracy: 1%), NTC1, NTC2, NTC3, and NTC4 are connected to the AD port of the microcontroller. R1, R4, R7, and R10 are voltage-dividing resistors in the temperature sampling circuit. R2, R5, R8, and R11 are current-limiting resistors in the temperature sampling circuit. The sample port collects four temperatures and controls the heating. PA0, PA1, PA4, and PB2 of the MCU are respectively connected to NTC1, NTC2, NTC3, and NTC4 of the temperature sampling circuit. Y1 and Y2 are chip clock crystal circuits, R65 and C60 form a reset circuit, and C36, C26, and C44 are filter capacitors. That is, the main control unit samples the values ​​of the four temperature sensors distributed in the heating container, calculates the temperature difference of the four temperature sensors, and controls the motor stirring speed according to the difference between the four temperature sensors so that the cooked ingredients can be heated evenly.

[0113] Furthermore, in the present embodiment, it can also be considered that the outer wall of the container cover 2 is bent outward and downward at least once to form a container cover clamping wall 10 with at least one annular step surface structure, and a sealing ring 11 is provided inside the container cover 2. The lower end of the sealing ring 11 is formed with at least one sealing lip extending outward. When the container cover 2 is buckled on the heating container 1, the free end of the sealing lip is in close contact with the inner wall of the upper part of the heating container 1, so that a seal is formed between the container cover 2 and the heating container 1 to prevent the food in the heating container 1 from overflowing.

[0114] Furthermore, in this embodiment, a stirring structure 19 is provided in the heating container 1. The stirring structure 19 drives the food to stir / turn during the rotation process, which not only helps to improve the stirring performance of the food, but also prevents the bottom of the heating container 1 from sticking. The stirring structure 19 is connected to the switched reluctance motor 4 through a clutch structure. The clutch structure includes:

[0115] An upper clutch 20, which is mounted on the stirring shaft of the stirring structure 19 and is located below the heating container 1;

[0116] The lower clutch 21 is assembled on the motor shaft of the switched reluctance motor 4. The lower clutch 21 is formed with an assembly slot for the upper clutch 20 to be matched and inserted. The switched reluctance motor 4 is electrically connected to the micro control unit MCU.

[0117] Embodiment 2:

[0118] Embodiment 2 of the present invention is a further improvement based on Embodiment 1 to fully exert the technical advantages of the present invention. An illustrative description is given below.

[0119] For example: As Figures 1 - 5 shown, the lid inspection structure includes a lid inspection switch 23. Taking this embodiment as an example, the number of lid inspection switches 23 is two, namely the left lid inspection switch and the right lid inspection switch. The lid inspection switch 23 includes a safety link 2302, a fixed bracket 2301, and an induction structure 2303 installed on the fixed bracket 2301. When the container lid 2 is buckled in place, the safety link 2302 triggers the induction structure 2303, where: an open induction groove is formed through one end of the induction structure facing the safety link 2302, and a transmitting end and a receiving end are oppositely arranged in the induction groove.

[0120] Furthermore, it can also be considered in this embodiment that the safety link 2302 is rotatably installed on the fixed bracket 2301 through a pin shaft, and a torsion spring for assisting the safety link to reset is arranged on the pin shaft. One end of the safety link 2302 is a movable end, and the other end is a trigger end. The fixed bracket is arranged in the handle housing 5 and / or the control housing 6. The movable end of the safety link 2302 extends into the lid closing gap 7, and a protective sleeve 2305 is covered outside the movable end of the safety link 2302. When the container lid 2 is not buckled in place, the trigger end of the safety link 2302 is located below the induction groove; when the container lid 2 is buckled in place, the trigger end of the safety link 2302 is located in the induction groove. The safety link 2302 uses the lever principle to realize the connection between the container lid and the induction structure, that is, the position of the safety link is changed by whether the container lid is buckled in place, and the position change of the safety link changes the state of the photoelectric switch. The MCU judges whether the container lid is buckled in place by detecting the state of the photoelectric switch. The structure is simple, easy to load and unload, highly operable, and has high detection accuracy.

[0121] Furthermore, it can also be considered in this embodiment that the induction structure is a photoelectric switch. The induction structure includes a photoelectric switch circuit board 2304, and the photoelectric switch circuit board 2304 is electrically connected to the micro control unit MCU. The transmitting end thereof is the grating hole of the photoelectric switch, and the receiving end is the light receiving hole of the photoelectric switch. As Figure 6As shown, the number of lid switches 23 is two, that is, the number of photoelectric switches is two, namely U1 and U2. When the heating container does not have the container lid buckled, the safety link extends obliquely. The triggering end of the safety link 2302 is located below the induction groove 2303, that is, it does not pass through the grating of the photoelectric switch. The optical signal passes through the grating hole and reaches the light-receiving hole, and the photoelectric switch is turned on. SW1 and SW2 output high level to the MCU. The MCU detects that both SW1 and SW2 are at high level and determines that the container lid is not buckled or the container lid is not buckled in place. When the container lid is buckled onto the heating container, the container lid exerts a force on the movable end of the safety link 2302. The safety link is pressed down by the container lid and is parallel to the tabletop. The angle of the safety link 2302 changes and passes through the induction groove of the photoelectric switch. The optical signal cannot pass through the grating hole and reach the light-receiving hole, and the photoelectric switch is turned off. SW1 and SW2 output low level to the MCU. The MCU detects that both SW1 and SW2 are at low level and determines that the container lid is buckled in place. When the MCU detects that one of SW1 and SW2 is at high level and the other is at low level, it is determined that the cup lid is on, but not buckled in place.

[0122] Embodiment 3:

[0123] Embodiment 3 of the present invention is further improved on the basis of the above embodiments in order to fully exert the technical advantages of the present invention. The following is an illustrative description thereof.

[0124] For example: As Figures 7 - 8 shown, the lid detection structure further includes a Hall device 28. The Hall device is arranged in the handle housing 5 and / or the control housing 6. A magnetic material is installed in the container lid 2. The magnetic material is preferably a magnetic strip 29, which is embedded in the side wall of the container lid 2 along the contour of the side wall of the container lid 2. After the container lid 2 is buckled on the heating container 1, the magnetic strip 29 on the container lid 2 will approach the Hall device 28 of the host. By detecting the signal of the Hall device 28 by the main control unit, it can be determined whether there is a lid.

[0125] Furthermore, it can also be considered in this embodiment that the Hall device 28 is preferably a linear Hall switch. Compared with the high and low level signals of the Hall switch, the output electrical signal of the linear Hall switch is an AD value. Detecting the AD is beneficial for the detection and identification of the main control unit after the Hall device fails. The Hall device is arranged in the handle housing 5 and / or the control housing 6 and close to the position of the heating container 1. Preferably, the height of the Hall device 28 is slightly lower than the height of the container edge of the heating container 1. After the container lid 2 is buckled on the heating container 1, the magnetic strip 29 on the container lid 2 will approach the Hall device 28 of the host. The Hall device 28 is electrically connected to the micro control unit MCU through a Hall device circuit board. As Figure 8As shown, the KG terminal of the Hall switch circuit is the detection terminal of the MCU. When the magnetic stripe is far from the Hall switch, the Hall switch is in an open state, and the KG level is the same as that of GND; when the magnetic stripe approaches the Hall, the Hall switch is in a conducting state, and the KG level is between VCC and GND. The specific value is determined by R6 and R45, and generally adjusted to be greater than 0.7 times VCC.

[0126] In the present invention, multiple types of detection and cover structures are used together to determine whether the container cover is properly closed, with accurate judgment, and the overall safety performance is improved on the premise of preventing the product from starting up incorrectly.

[0127] Embodiment 4:

[0128] Embodiment 4 of the present invention is further improved on the basis of the above embodiments to fully exert the technical advantages of the present invention. The following is an illustrative description.

[0129] For example: As Figure 11 shown, the locking structure includes a gearbox structure 12, a PCB fixing plate 17 provided on the upper surface of the gearbox structure, and a locking structure 13 that is slidably adapted to the gearbox structure 12 and can move forward / backward relative to the gearbox structure 12. A driving structure for driving the locking structure 13 to move forward / backward is provided inside the gearbox structure 12.

[0130] Furthermore, it can also be considered in this embodiment that the locking structure 13 includes a support body 1301, a locking body 1302 and a sliding body 1303 that are respectively vertically formed at the upper and lower ends of the support body 1301 and extend in opposite directions. The gearbox structure 12 is assembled in the handle shell 5 and / or the control shell 6. An opening for the locking body 1302 to extend / retract is provided on one side of the handle shell 5 / control shell 6 facing the cover closing gap 7.

[0131] Furthermore, it can also be considered in this embodiment that the number of the locking structures is at least two. In this embodiment, the number of the locking structures is two, namely a left locking structure and a right locking structure.

[0132] Working principle of the locking structure: The gearbox structure 12 is a housing structure with an open end. The gearbox structure 12 includes a PCB fixing plate and a gearbox that are buckled up and down. A locking positioning space is formed inside the gearbox for the locking structure 13 to move forward / backward. The driving structure includes a rack 14 formed at the lower end of the sliding body 1303 and arranged along the length direction of the sliding body 1303, a gear 15 meshing with the rack 14, and a locking motor 16 drivingly connected to the gear 15. The locking motor is preferably a DC motor. The locking motor 16 is assembled at the lower end of the gearbox, and the motor shaft of the locking motor 16 extends into the locking positioning space and is connected to the gear 15. The locking motor 16 is connected to the micro control unit MCU. When the locking structure is used to lock the container lid 2, the micro control unit MCU drives the locking motor 16 to rotate. The locking motor 16 drives the gear 15 to rotate. The gear 15 meshes with the rack 14, and then drives the locking structure 13 to move forward along the locking positioning space, realizing driving the locking structure 13 to move towards the lid closing gap 7 through the locking motor 16, and the container lid 2 is in the locked state. When the locking structure is used to unlock the container lid 2, the micro control unit MCU drives the locking motor 16 to rotate in the reverse direction. The principle is the same as above, realizing driving the locking structure 13 to move away from the lid closing gap 7 through the locking motor 16, and the container lid 2 is in the unlocked state, and the container lid 2 and the heating container 1 can move freely.

[0133] Furthermore, it can also be considered in this embodiment that the sliding body 1303 is inserted into the locking positioning space through the open end of the gearbox structure, and the sliding body 1303 is slidably adapted to the locking positioning space and can move forward / backward along the locking positioning space. At this time, the locking structure 13 can extend / retract along the opening on the handle shell 5 / control shell 6, so as to realize that the locking body 1302 of the locking structure 13 covers above / away from the container lid clamping wall 10, and then realize the locking / unlocking of the position of the container lid 2.

[0134] Embodiment 5:

[0135] Embodiment 5 of the present invention is further improved on the basis of the above embodiments in order to fully exert the technical advantages of the present invention. The following is an illustrative description of this.

[0136] For example: The lid closing detection structure includes a current detection structure. The number of the current detection structures is the same as that of the locking structures. The current detection structure includes a motor drive chip 24. The motor drive chip 24 is electrically connected to the locking motor 16 and the main control unit respectively.

[0137] Such as Figures 11 - 15As shown, pin 1 of the motor drive chip 24 is connected to the power supply VCC. Pins 2 and 3 of the motor drive chip are motor drive input ports. Pins 2 and 3 of the motor drive chip are respectively connected to pins 13 and 12 of the microcontroller unit MCU. Pins 6 and 7 of the motor drive chip are connected to pin 11 of the microcontroller unit MCU. Pins 5 and 8 of the motor drive chip are motor drive output ports. Pins 5 and 8 of the motor drive chip are connected to the latch motor 16.

[0138] Working principle of the current detection structure: The latch structure 13 is driven to move by the latch motor 16. After the container lid 2 is closed, when the latch motor 16 drives the latch structure 13 to slide forward, when the latch structure 13 is not locked in place, the latch motor 16 moves normally, and its motor movement is the rated current I. When the latch structure 13 is locked in place (the latch body 1302 is clamped above the container lid clamping wall 10), the latch structure 13 cannot move anymore, the latch motor 16 is blocked, the rated current of the latch motor 16 increases, and the current I of the latch motor flows through the resistor R to generate a voltage AD signal. This AD signal is input to pin 5 of the microcontroller unit MCU for processing. When pin 5 of the microcontroller unit MCU detects the voltage, the voltage U = I*R during normal operation. When the container lid is closed in place, the latch motor 16 cannot move and enters a blocked state, the current suddenly increases, and its voltage U increases synchronously. The microcontroller unit MCU detects this sudden change in voltage and determines that it has been closed in place, and then stops outputting the motor drive signal. The motor drive chip then drives the latch motor 16 to stop working to prevent the latch motor 16 from being blocked for a long time.

[0139] Embodiment 6:

[0140] Embodiment 6 of the present invention is further improved on the basis of the above embodiments in order to fully exert the technical advantages of the present invention. The following is an illustrative description of this.

[0141] For example: As Figures 11 - 15 shown, the lid closing detection structure further includes a photoelectric detection structure. The number of the photoelectric detection structures is the same as the number of the locking structures and is arranged on the PCB fixing plate 17. Taking this embodiment as an example, it is divided into a left photoelectric detection structure and a right photoelectric detection structure. The photoelectric detection structure includes a photoelectric gate control board 25, a shielding member 26, and at least one photoelectric detection member 27. The photoelectric gate control board 25 is electrically connected to the photoelectric detection member 27 and the microcontroller unit MCU respectively. The photoelectric detection member is preferably a photoelectric switch. The photoelectric detection member includes a transmitting end and a light receiving end oppositely arranged on both sides of the strip-shaped through groove. The shielding member is fixed on the upper surface of the latch structure. When the shielding member enters the triggering area between the transmitting end and the light receiving end of the photoelectric detection member along with the latch structure, the photoelectric detection member emits a signal.

[0142] Further, it can also be considered in this embodiment that a strip-shaped through groove 18 for the sliding of the shielding member 26 is formed through the PCB fixing plate 17. During the forward / backward movement of the locking structure relative to the gearbox structure, the shielding member 26 can slide forward / backward along the strip-shaped through groove 18.

[0143] Further, it can also be considered in this embodiment that the number of photoelectric detection components on each of the locking structures is two, including a first photoelectric detection component (photoelectric detection 1) 2701 and a second photoelectric detection component (photoelectric detection 2) 2702. The two photoelectric detection components are respectively located at the front and rear positions of the strip-shaped through groove.

[0144] Further, it can also be considered in this embodiment that the photoelectric detection component 27 includes a transmitting end and a receiving end oppositely arranged on both sides of the strip-shaped through groove 18. The transmitting end and the receiving end are fixed on the upper surface of the PCB fixing plate, and the shielding member 26 is fixed on the upper surface of the locking structure 13. When the shielding member 26 enters the triggering area between the transmitting end and the receiving end of the first photoelectric detection component 2701 along with the locking structure, the first photoelectric detection component 2701 emits a signal. Process of closing the locking structure: The locking motor drives forward, driving the locking structure to displace. The displacement amount is that the shielding member 26 displaces from the second photoelectric detection component 2702 to the first photoelectric detection component 2701. When the shielding member 26 reaches the position of the first photoelectric detection component 2701, the locking structure buckles the container lid, and the first photoelectric detection component 2701 emits a signal to complete the closing of the lid locking; when the shielding member 26 enters the triggering area between the transmitting end and the receiving end of the second photoelectric detection component 2702 along with the locking structure, the second photoelectric detection component 2702 emits a signal. Process of opening the locking structure: The locking motor drives in reverse, driving the locking structure to displace. The displacement amount is that the shielding member 26 displaces from the first photoelectric detection component 2701 to the second photoelectric detection component 2702. When the shielding member 26 reaches the position of the second photoelectric detection component 2702, the locking structure moves away from the container lid, and the second photoelectric detection component 2702 emits a signal to complete the opening of the lid locking.

[0145] Embodiment 7:

[0146] When the lid detection switch, the locking structure, the current detection structure, and the photoelectric detection structure are jointly applied, the locking / opening system process of the locking structure includes the following steps:

[0147] Step 1: Determine whether cooking starts.

[0148] Step 2: If cooking starts, determine whether the left lid detection switch and the right lid detection switch are closed. If closed, perform the lid locking and closing process of the locking structure (as Figure 14 shown). Otherwise, prompt the user that the lid is not placed.

[0149] Step 3: Cooking If the lid locking process has not started / ended, perform the lid opening process (as Figure 15 shown).

[0150] Among them: The specific steps of the above-mentioned Step 2 are as follows:

[0151] Step 2.1: After determining that the container lid is properly latched, the latching motor drives forward.

[0152] Step 2.2: Determine whether the left photoelectric detection 1 and the right photoelectric detection 1 are successfully sensed.

[0153] Step 2.3: If the left photoelectric detection 1 and the right photoelectric detection 1 are successfully sensed, determine whether the working current of the latching motor is greater than or equal to the motor stall current. If it is greater than or equal to, the lid locking is completed and cooking is allowed to start. Otherwise, return to Step 2.1

[0154] Step 2.4: If the left photoelectric detection 1 and the right photoelectric detection 1 are not successfully sensed, determine whether the working current of the latching motor is greater than or equal to the motor stall current. If it is greater than or equal to, a lid locking failure occurs. Otherwise, return to Step 2.1

[0155] Among them: The specific steps of the above-mentioned Step 3 are as follows:

[0156] Step 3.1: The latching motor drives in the reverse direction.

[0157] Step 3.2: Determine whether the left photoelectric detection 2 and the right photoelectric detection 2 are successfully sensed.

[0158] Step 3.2: If the left photoelectric detection 2 and the right photoelectric detection 2 are successfully sensed, determine whether the working current of the latching motor is greater than or equal to the motor stall current. If it is greater than or equal to, the lid opening is completed and cooking ends. Otherwise, return to Step 3.1 and continue to execute.

[0159] Step 3.3: If the left photoelectric detection 2 and the right photoelectric detection 2 are not successfully sensed, determine whether the working current of the latching motor is greater than or equal to the motor stall current. If it is greater than or equal to, a lid locking failure occurs and cooking ends. Otherwise, return to Step 3.1 and continue to execute.

[0160] Embodiment 8:

[0161] Embodiment 8 of the present invention is further improved on the basis of the above embodiment in order to fully exert the technical advantages of the present invention. The following is an illustrative description thereof.

[0162] For example: The lid closing detection structure further includes a contact detection structure, and the contact detection structure includes:

[0163] The detection contact 30 is provided on the latch structure 13, and the number thereof is the same as that of the latch structure 13. The detection contacts are respectively arranged on the side surfaces of each of the latch structures 13 in contact with the container lid clamping wall 10;

[0164] The conduction structure 31 is in a closed annular structure and is embedded along the contour of the container lid clamping wall 10 on the side surface of the container lid clamping wall 10 in contact with the latch structure 13;

[0165] When the locking structure is locked on the container lid 2, the detection contact 30 on the locking structure is in contact with the conduction structure 31.

[0166] Preferably, the detection contact 30 is a metal contact, and the conduction structure 31 is a metal ring piece.

[0167] Furthermore, it can also be considered in this embodiment that one of the detection contacts 30 is electrically connected to the main control unit. When each locking structure is locked on the container lid 2, all the detection contacts 30 are electrically connected to each other through the conduction structure 31. As Figure 18 shown, P1 and P2 are respectively connected to two metal contacts on the left and right latch structures, P_GAI is connected to the detection port of the microcontroller unit MCU, R1 is the pull-up resistor of the lid detection circuit, R2 is the current-limiting resistor, C1 is the filter capacitor, the PB9 port of the main control unit chip is connected to the lid detection circuit. When the container lid is closed in place, PB9 detects a low level, and when the container lid is not closed in place, PB9 detects a high level. C36, C26, and C44 are filter capacitors. The microcontroller unit MCU determines whether the lid is closed and locked in place through the switch signal quantity output by the lid detection circuit.

[0168] Working principle: When starting cooking with the container lid placed, the latch structure extends out to press the container lid tightly. If the container lid is placed in place, the latch structures on both the left and right sides will push against the metal ring piece embedded in the container lid, so that the metal contacts on the left and right latch structures are electrically connected. That is, only when both latch structures are locked successfully, the two detection contacts 30 are electrically connected to each other through the conduction structure 31. The MCU can determine whether the container lid is placed and whether the container lid is placed and locked in place by detecting whether the detection contacts 30 of the left and right latches are electrically connected. When the two detection contacts 30 cannot be electrically connected to each other through the conduction structure 31, it is determined that the container lid is not placed in place, for example, one side or both sides are tilted up.

[0169] In the present invention, multiple types of lid closing detection structures are used to jointly detect the opening / locking of the locking structure and determine whether the locking structure is locked in place, with accurate judgment, and the overall safety performance is improved on the premise of preventing the product from starting to work by mistake.

[0170] Embodiment 9:

[0171] Example 9 of the present invention is further improved on the basis of the above embodiments so as to fully exert the technical advantages of the present invention. An illustrative description is given below.

[0172] For example: As Figure 11 shown, the anti-overflow structure includes an anti-overflow detection element 32 for detecting the pressure of the gas in the container assembly and a heating control unit for adjusting the heating temperature in the container assembly. By detecting the pressure of the gas in the container assembly with the anti-overflow detection element 32, it is possible to pre-judge whether overflow is about to occur based on the pressure, and thus reduce the heating power of the heating control unit in advance to achieve the purpose of preventing overflow.

[0173] Furthermore, it can also be considered in this embodiment that the anti-overflow detection element 32 is disposed on the side surface where the locking structure 13 contacts the container lid 2, and the anti-overflow detection element 32 is electrically connected to the main control unit, as Figure 11 shown, the anti-overflow detection element 32 is preferably disposed on the bottom surface where the locking structure 13 contacts the container lid 2.

[0174] Furthermore, it can also be considered in this embodiment that the side surface where the locking structure 13 contacts the container lid 2 is adapted to the shape of the container lid clamping wall 10.

[0175] Furthermore, it can also be considered in this embodiment that the anti-overflow detection element 32 is a pressure sensor, preferably a strain gauge type pressure sensor. The resistance strain gauge model is preferably BX120-3AA with a resistance value of 120 ohms. The pressure sensor is connected to the main control unit through an AD sampling circuit, as Figure 16 、 17 shown, U3 is an AD conversion chip, and the AD conversion chip model is preferably CS5555. E+, E-, S+, S- are connected to the pressure sensor strain gauge bridge. C2, C3, C4, C5, C8 are filter capacitors, and R3 and R4 are current limiting resistors. The main control unit circuit samples the pressure value of the pressure sensor and controls the heating control unit through calculation to prevent overflow. Among them: the main control unit model is preferably MQ6823. The P75, P70, and P76 ports of the chip are connected to the CS5555 AD sampling chip to read the AD value converted by the AD sampling chip, sample the pressure value of the pressure sensor, and control the heating through calculation to prevent overflow.

[0176] When the locking structure 13 is locked onto the container lid 2, the detection surface of the pressure sensor is in contact with the container lid clamping wall 10. The pressure sensor is used to detect the pressure generated by the expansion of the gas inside the container component on the container lid. The anti-overflow detection method is as follows: First, start cooking. After the locking structure is locked in place, record the pressure value P1 detected by the current pressure sensor. During the cooking process, the main control unit real-time detects the change in the pressure value of the pressure sensor. When the pressure value P detected by the pressure sensor is greater than 1.05 times of P1, the heating control unit can be controlled to reduce the heating power of the coil disk to 1 / 2 of the original heating power. When the pressure value P detected by the pressure sensor is greater than 1.1 times of P1, the heating is stopped, and the maximum pressure of the container lid is controlled to prevent too much gas from accumulating in the pot and overflowing.

[0177] In this embodiment, the pressure sensor placed on the locking structure 13 detects the pressure generated by the expansion of the gas inside the pot on the container lid 2. When it is detected that the pressure increases, the power can be reduced to ensure no overflow. That is, whether it is about to overflow can be pre-judged through the pressure, and then the power is reduced in advance to achieve the purpose of preventing overflow.

[0178] Embodiment 10:

[0179] Embodiment 10 of the present invention is further improved on the basis of the above embodiment to fully exert the technical advantages of the present invention. The following is an illustrative description.

[0180] For example: As Figure 25 shown, the anti-overflow structure further includes a touch detection element 34 and a touch chip arranged on the outer top of the container component. Preferably, the touch detection element is a touch spring. The material of the touch spring is stainless steel. An insulating layer is embedded in the inner wall of the container component. When the liquid food material in the container component reaches / exceeds the detection liquid level of the touch detection element 34, a capacitance effect is generated between the touch detection element 34 and the liquid food material, and the signal is transmitted to the touch chip.

[0181] Taking this embodiment as an example, the container component is designed as a double-layer structure, which includes a mounting housing 9 and a heating container 1 installed in the mounting housing 9. The mounting housing 9 and the heating container 1 are closely attached. The touch detection element and the touch chip are arranged on the outer top of the mounting housing 9, and the insulating layer is embedded in the inner wall of the heating container 1. When the liquid food material in the heating container 1 reaches / exceeds / submerges the height where the touch spring is located, at this time, the mounting housing 9 and the heating container 1 are used as conductive materials, and the insulating layer is used as an insulating material. That is, there is an insulating material between the touch spring and the liquid food material, so that a capacitance effect is generated between the touch spring and the liquid food material, and the touch spring generates a touch signal and transmits the signal to the touch chip.

[0182] Further, it can also be considered in this embodiment that the touch spring and the touch chip are integrated on the touch PCB board, and the touch PCB board is welded to the outside of the container assembly (not shown in the figure). The touch chip preferably uses a touch chip with the model 19C030THS.

[0183] Further, it can also be considered in this embodiment that the insulating layer preferably uses high-temperature-resistant PBT material. When the insulating layer part on the inner wall of the container assembly is cut, the insulating layer is inlaid on the inner wall of the container assembly. The touch spring contacts the insulating material through the container assembly, and the insulating material contacts the liquid food ingredients.

[0184] The working principle of the anti-overflow structure in this embodiment is as follows Figure 25 , 26 As shown, when the liquid food ingredients in the container assembly reach / exceed / submerge the horizontal line where the touch spring is located (the touch spring does not directly contact the liquid), a capacitance effect is generated between the touch spring and the liquid food ingredients. The touch spring generates a touch signal through the capacitance effect and connects the signal to the I / O port of the 10th pin of the touch chip after passing through the current-limiting resistor R6. After the touch chip detects the touch signal, the 18th and 20th pins of the touch chip use the IIC communication protocol to communicate with the main control unit. After the main control unit receives the communication and determines that the liquid in the container assembly overflows, the main program starts the overflow process control so that the cooking appliance can adjust the heating power or stirring power, etc. to respond, thereby preventing the liquid from overflowing, so as to protect the whole machine and prevent safety accidents from occurring; this technical solution uses the touch method to detect the liquid level overflow and uses the capacitance effect to determine the liquid overflow. The touch spring does not need to contact the liquid food ingredients in the container assembly. Such a detection overflow scheme has a long service life and a high safety factor.

[0185] Among them: The principle of capacitive touch is that there is an induced capacitance between any two conductive objects. A button, that is, a pad and the ground can also form an induced capacitance. Under the condition that the surrounding environment remains unchanged, the value of this induced capacitance is a fixed and tiny value. When a human finger approaches the touch button, the induced capacitance formed by the human finger and the ground is connected in parallel with the induced capacitance formed by the pad and the ground, which will increase the total induced capacitance value. After the capacitive touch button IC detects that the induced capacitance value of a certain button has changed, it will output a confirmation signal that a certain button has been pressed. Relatively speaking, the liquid in the container is also a conductive object and also forms an induced capacitance with the ground.

[0186] In the present invention, multiple types of anti-overflow structures are used together to prevent the food ingredients in the container assembly from overflowing, with accurate judgment, and improve the overall safety performance on the premise of preventing the product from starting to work by mistake.

[0187] Embodiment 11:

[0188] Embodiment 11 of the present invention is further improved on the basis of Embodiment 10 so as to fully exert the technical advantages of the present invention. An illustrative description is given below.

[0189] For example, the number of the touch detection elements 34 is at least two, and they are sequentially distributed at different height positions on the outer side of the container assembly from bottom to top. When the liquid food ingredients in the container assembly reach / exceed / submerge the touch detection elements 34 at different heights, a capacitance effect is generated between the touch springs here and the liquid food ingredients. The touch springs that generate the capacitance effect will generate their respective touch signals and transmit the signals to the touch chip. The touch chip is communicatively connected to the main control unit of the cooking appliance. The touch chip receives the signals and determines the water level height in the container assembly. The touch springs can detect the liquid level height without contacting the liquid food ingredients in the container assembly. Such a liquid level detection solution has a long service life, a high safety factor, and does not affect the stirring effect and cooking effect.

[0190] Embodiment 12:

[0191] Embodiment 12 of the present invention is further improved on the basis of the above embodiments so as to fully exert the technical advantages of the present invention. An illustrative description is given below.

[0192] For example, an oil fume detection structure for detecting the oil fume amount and controlling the oil fume is provided in the cooking appliance. The oil fume detection structure includes an oil fume detection element 35 for detecting the oil fume amount, a motor control unit for adjusting the stirring speed in the container assembly, and a heating control unit for adjusting the heating temperature in the container assembly. The oil fume detection element 35 is a smoke sensor, and the smoke sensor is electrically connected to the main control unit. The oil fume value (oil fume concentration) can be detected by the oil fume detection element 35. When the detected oil fume concentration is greater than a certain value, the motor control unit is controlled to increase the motor stirring speed at this time. If the bottom of the pot is burned due to uneven heating of the food, the oil fume will decrease at this time due to the increased motor stirring speed to achieve the purpose of controlling the oil fume. If it is detected that the smoke concentration does not decrease, the heating power can be controlled by the heating control unit to decrease the oil fume concentration, so as to prevent the food from burning at the bottom and control the oil fume.

[0193] Embodiment 13:

[0194] Embodiment 13 of the present invention is further improved on the basis of the above embodiments so as to fully exert the technical advantages of the present invention. An illustrative description is given below.

[0195] For example, a shaking detection structure for detecting the shaking amount of the cooking appliance body and controlling the shaking of the body is provided inside the cooking appliance. The shaking detection structure includes a shaking detection element 36 for detecting the shaking amount of the body and a motor control unit for adjusting the stirring speed in the container assembly. The shaking amount of the body can be detected in real time by the shaking detection element 36. When it is detected that the shaking amount of the body is too large (exceeding the set threshold), the motor control unit controls the forward and reverse rotation and the rotation speed of the motor, so that the shaking amount of the body is restored to the normal range, solving the problem of excessive shaking during dough kneading by most stir-fry machines. Preferably, the shaking detection element is arranged inside the control shell. The shaking detection element is a shaking detector sensor, and the shaking detector sensor may include, but is not limited to, an acceleration sensor and a gyroscope. The acceleration sensor and the gyroscope are electrically connected to the micro control unit MCU of the main control unit.

[0196] Embodiment 14:

[0197] A cooking method for a cooking appliance with safe cooking, which includes the following steps:

[0198] Step 1: Insert the heating container 1 into the container assembly space of the installation shell 9, install the installation shell 9 on the main machine, and turn on the power of the cooking appliance to prepare for cooking;

[0199] Step 2: Put each ingredient into the heating container 1, select a cooking mode through the display screen assembly 8, and the display screen assembly 8 sends a signal to the main control unit, and the main control unit determines the recipe type;

[0200] Step 3: According to the recipe type, determine whether it is necessary to detect whether the container lid is properly closed and / or determine whether it is necessary to lock / open the locking structure;

[0201] Step 4: If it is necessary to detect whether the container lid is properly closed, detect whether the container lid is properly closed through the lid detection structure and send the detection signal to the main control unit. As shown in Embodiments 2 and 3, detect whether the container lid is properly closed through the lid detection switch 23 and / or the Hall device 28;

[0202] If it is necessary to lock / open the locking structure, detect the state of the locking structure through the lid closing detection structure and send the detection signal to the main control unit. The main control unit controls the locking / open of the locking structure. As shown in Embodiments 4-7, detect whether the lock catch structure 13 is locked or open through the current detection structure, and / or the photoelectric detection structure, and / or the contact detection structure, and control the locking / open of the lock catch structure 13 through the main control unit according to the requirements of the recipe type;

[0203] Step 5: After the detection is completed, start the stirring function of the stirring component in the container component through the motor control unit and control the stirring speed, and / or start the heating function of the coil group in the coil disc structure through the heating control unit and control the heating power to start cooking.

[0204] Furthermore, it can also be considered in this embodiment that the determination criteria for the recipe type in step 2 are based on whether the stirring function, stirring speed, and heating function are started in different cooking modes. For all possible recipes, they are pre-classified into type A, type B, and type C recipes according to safety attributes, that is, the recipe types include:

[0205] Type A recipes: Start the stirring function and the stirring speed is greater than N gears. In this embodiment, 2 gears are taken as an example.

[0206] Type B recipes: Start the stirring function and the stirring speed is less than or equal to N gears, and start the heating function. In this embodiment, 2 gears are taken as an example.

[0207] Type C recipes: Only start the heating function without starting the stirring function.

[0208] Furthermore, it can also be considered in this embodiment that as Figure 27 shown, step 3 further includes:

[0209] Step 3.1: According to the recipe type classification, determine whether the current recipe type is a type A recipe. If so, continue to execute step 3.2; if not, execute step 3.4.

[0210] Step 3.2: First, judge whether the container lid is properly fastened through the lid detection structure. If so, continue to execute step 3.3; if not, prompt that the container lid is not placed and repeat step 3.2.

[0211] Step 3.3: Then judge whether the locking structure is locked through the lid closing detection structure. If so, the detection is completed and cooking starts; if not, control the locking structure to lock and repeat step 3.3.

[0212] Step 3.4: According to the recipe type classification, determine whether the current recipe type is a type B recipe. If so, continue to execute step 3.5; if not, execute step 3.7.

[0213] Step 3.5: First, judge whether the container lid is properly fastened through the lid detection structure. If so, continue to execute step 3.6; if not, prompt that the container lid is not placed and repeat step 3.5.

[0214] Step 3.6: Then judge whether the locking structure is opened through the lid closing detection structure. If so, the detection is completed and cooking starts; if not, control the locking structure to open and repeat step 3.6.

[0215] Step 3.7: Classify according to the recipe type, and determine whether the current recipe type is a Type C recipe. If so, proceed to Step 3.8;

[0216] Step 3.8: Determine whether the locking structure is open through the lid closing detection structure. If so, the detection is completed and cooking starts; if not, control the locking structure to open and repeat Step 3.8.

[0217] In this technical solution, when the cooking machine cooks different recipe types, the container lid and the lock structure have corresponding control states, and the functions of the cooking machine are relatively rich.

[0218] First: For some recipe types that require the high-speed operation of the switched reluctance motor, such as ice crushing, etc., to ensure that users will not be accidentally injured, the cooking machine needs to detect whether the container lid is properly closed, whether the lock structure is locked, and whether the lock structure is effectively locked in place.

[0219] Second: For some recipe types of stir-frying, at this time, the switched reluctance motor only has a small gear stirring function and heating at the same time. Users may often open the container lid to observe and add seasonings during the cooking process. At this time, the motor operation is relatively safe. And to ensure the smoothness of cooking, it only needs to detect whether the container lid is properly closed, and there is no need to close (lock) the lock structure.

[0220] Third: For some recipe types with pure heating functions, such as steaming, etc., at this time, maybe only a steamer is needed without the container lid, so cooking can start without the container lid and without closing the lock structure. This cooking method can be applicable to different recipe types, with different cooking scenarios generated. The accurate control and processing methods for the container lid and the lock structure corresponding to each recipe can ensure both the simplicity, smoothness, and practicality of cooking and the safety of user operation.

[0221] In summary, the present invention provides a cooking appliance and its cooking method that can ensure both the simplicity, smoothness, and practicality of cooking and the safety of user operation.

[0222] The above embodiments have described the present invention in detail, but the content described is only the preferred embodiments of the present invention and cannot be considered as limiting the scope of implementation of the present invention. All equivalent changes and improvements made according to the scope of the present invention application should still fall within the scope covered by the patent of the present invention.

Claims

1. A cooking appliance for safe cooking, comprising a main body and a container assembly. The container assembly includes a heating container and a container lid snapped onto the heating container, characterized in that: The host is also provided with a lid detection structure for detecting whether the container lid is properly fastened, a locking structure for locking the container lid, a lid closing detection structure for detecting the opening / locking of the locking structure, and an anti-overflow structure for preventing the food ingredients in the container assembly from overflowing. The anti-overflow structure includes an anti-overflow detection element for detecting the gas pressure in the container assembly and a heating control unit for adjusting the heating temperature in the container assembly. The lid closing detection structure includes a current detection structure. The current detection structure includes a motor drive chip, which is electrically connected to a latch motor and a main control unit respectively. The main control unit includes a PCB board and a micro-control unit MCU. The pin 1 of the motor drive chip is connected to the power supply VCC. The pins 2 and 3 of the motor drive chip are motor drive input ports, and the pins 2 and 3 of the motor drive chip are respectively connected to the pins 13 and 12 of the micro-control unit MCU. The pins 6 and 7 of the motor drive chip are connected to the pin 11 of the micro-control unit MCU. The pins 5 and 8 of the motor drive chip are motor drive output ports, and the pins 5 and 8 of the motor drive chip are connected to the latch motor. The lid closing detection structure includes a photoelectric detection structure. The photoelectric detection structure includes a photoelectric door control board, a shielding member, and at least one photoelectric detection member. The photoelectric door control board is electrically connected to the photoelectric detection member and the main control unit respectively. The lid closing detection structure includes a contact detection structure. The contact detection structure includes a detection contact and a conduction structure. The detection contact is a metal contact. In the circuit of the detection contact, one of the detection contacts is electrically connected to the main control unit. When each locking structure is locked on the container lid, all the detection contacts are electrically connected to each other through the conduction structure. P1 and P2 in the circuit of the detection contact are respectively connected to two metal contacts on the left and right latch structures, P_GAI is connected to the detection port of the micro-control unit MCU, R1 is the pull-up resistor of the lid detection circuit, R2 is the current-limiting resistor, C1 is the filter capacitor, and the PB9 port of the chip of the main control unit is connected to the lid detection circuit.

2. The cooking appliance for safe cooking according to claim 1, wherein: The host includes: A host housing, which is internally equipped with a motor control unit for adjusting the stirring speed in the container assembly and a heating control unit for adjusting the heating temperature in the container assembly. Handle shells and control shells are fixedly connected to both sides of the host housing respectively. Lid closing gaps for inserting the container lid are formed between the handle shells, the control shells and the container assembly respectively. The control shell is internally equipped with a main control unit for controlling the operation of the cooking appliance. An installation housing, which is assembled on the host housing and internally forms a container assembly space for fitting and installing a heating container.

3. The cooking appliance for safe cooking according to claim 2, characterized in that: A display screen assembly is rotatably connected to the control shell through a rotating shaft. An angle adjustment assembly for adjusting the opening angle of the display screen assembly is connected between the display screen assembly and the control shell.

4. The cooking appliance for safe cooking according to claim 3, wherein: The cooking appliance is also provided with an induction lifting structure for detecting whether someone is approaching and controlling the opening / retraction of the display screen assembly.

5. The cooking appliance for safe cooking according to claim 3, wherein: The motor control unit includes a switched reluctance motor assembled in the main housing. The heating control unit includes a coil disc structure assembled on the upper part of the main housing and a coil group arranged in the coil disc structure. The motor control unit and the heating control unit are electrically connected to the main control unit respectively.

6. The cooking appliance for safe cooking according to claim 5, wherein: On the coil disc structure, 2-6 temperature sensing elements are evenly arranged along its circumferential direction. The temperature sensing elements are telescopically and penetratingly assembled on the coil disc structure.

7. The cooking appliance for safe cooking according to claim 5, characterized in that: The outer wall of the container cover is formed with at least one layer of annular stepped surface structure of the container cover clamping wall through at least one outward and downward bending.

8. The cooking appliance for safe cooking according to claim 7, characterized in that: The lid detection structure includes a lid detection switch. The lid detection switch includes a safety link, a fixed bracket and a sensing structure installed on the fixed bracket. When the container cover is buckled in place, the safety link triggers the sensing structure.

9. The cooking appliance for safe cooking according to claim 7, wherein: The lid detection structure further includes a Hall device. The Hall device is arranged in the handle housing and / or the control housing. A magnetic material is installed in the container cover.

10. The cooking appliance for safe cooking according to claim 7, characterized in that: The locking structure includes a gearbox structure, a PCB fixing plate arranged on the upper surface of the gearbox structure, and a buckle structure that is slidably matched with the gearbox structure and can move forward / backward relative to the gearbox structure. A driving structure for driving the buckle structure to move forward / backward is arranged in the gearbox structure.

11. A cooking appliance for safe cooking according to claim 10, characterized in that: The driving structure includes a rack formed at the lower end of the buckle structure and arranged along the length direction of the buckle structure, a gear meshing with the rack, and a buckle motor drivingly connected with the gear.

12. The cooking appliance for safe cooking according to claim 11, characterized in that: The gearbox structure is arranged in the handle housing and / or the control housing. An opening for the buckle structure to extend / retract is formed on one side of the handle housing and / or the control housing facing the lid closing gap.

13. The cooking appliance for safe cooking according to claim 11, wherein: The number of the current detection structures is the same as that of the locking structures.

14. A cooking appliance for safe cooking according to claim 11, characterized in that: The number of the photoelectric detection structures is the same as that of the locking structures and is arranged on the PCB fixing plate.

15. A cooking appliance for safe cooking according to claim 14, characterized in that: The photoelectric detection component includes a transmitting end and a receiving end oppositely arranged on both sides of the strip-shaped through groove. The shielding piece is fixed on the upper surface of the buckle structure. When the shielding piece enters the triggering area between the transmitting end and the receiving end of the photoelectric detection component along with the buckle structure, the photoelectric detection component emits a signal.

16. The cooking appliance for safe cooking according to claim 15, characterized in that: The number of photoelectric detection components on each locking structure is two. The two photoelectric detection components are respectively located at the front and rear positions of the strip-shaped through groove.

17. The cooking appliance for safe cooking according to claim 11, characterized in that: The lid closing detection structure further includes a contact detection structure. The contact detection structure includes: Detection contacts, which are arranged on the buckle structure. The number of the detection contacts is the same as that of the buckle structures, and they are correspondingly arranged on the side surfaces of each buckle structure in contact with the container cover clamping wall; A conduction structure, which is a closed annular structure and is inlaid along the contour of the container cover clamping wall on the side surface of the container cover clamping wall in contact with the buckle structure; When the locking structure is locked on the container cover, the detection contacts on the locking structure are in contact with the conduction structure.

18. A cooking appliance for safe cooking according to claim 11, characterized in that: The anti-overflow structure further includes a touch detection element and a touch chip arranged on the outer top of the container assembly. An insulating layer is embedded in the inner wall of the container assembly. When the liquid food materials in the container assembly reach / exceed the detection liquid level of the touch detection element, a capacitance effect is generated between the touch detection element and the liquid food materials and a signal is transmitted to the touch chip.

19. A cooking appliance for safe cooking according to claim 18, characterized in that: The number of the touch detection elements is at least two, and they are sequentially distributed at different height positions on the outer side of the container assembly from bottom to top.

20. A cooking appliance for safe cooking according to claim 11, characterized in that: An oil fume detection structure for detecting the amount of oil fume and controlling the oil fume is provided in the cooking appliance.

21. A cooking appliance for safe cooking according to claim 11, characterized in that: A shaking detection structure for detecting the amount of shaking of the body and controlling the shaking of the body is provided in the cooking appliance.

22. The cooking method of the cooking appliance for safe cooking according to claim 5, characterized in that: It includes the following steps: Step 1: Insert the heating container into the container assembly space of the installation housing, install the installation housing on the main machine, connect the cooking appliance to the power supply, and prepare for cooking; Step 2: Put each ingredient into the heating container, select a cooking mode through the display screen assembly and send it to the main control unit, and the main control unit determines the recipe type; Step 3: According to the recipe type, determine whether it is necessary to detect whether the container lid is properly closed and / or determine whether it is necessary to lock / open the locking structure; Step 4: If it is necessary to detect whether the container lid is properly closed, detect whether the container lid is properly closed through the lid detection structure, and send the detection signal to the main control unit; If it is necessary to lock / open the locking structure, detect the state of the locking structure through the lid closing detection structure, and send the detection signal to the main control unit, and the main control unit controls the locking structure to lock / open; Step 5: After the detection is completed, start the stirring function of the stirring component in the container assembly through the motor control unit and control the stirring speed, and / or start the heating function of the coil group in the coil disc structure through the heating control unit and control the heating power, and start cooking.

23. The cooking method according to claim 22, wherein: The determination criterion for the recipe type in the step 2 is based on whether the stirring function, the stirring speed and the heating function are started in different cooking modes. The recipe types include: Type A recipe, the stirring function is started and the stirring speed is greater than 2 gears; Type B recipe, the stirring function is started and the stirring speed is less than or equal to 2 gears, and the heating function is started; Type C recipe, only the heating function is started and the stirring function is not started.

24. The cooking method according to claim 23, wherein: The step 3 further includes: Step 3.1: Classify according to the recipe type, determine whether the current recipe type is a type A recipe. If so, continue to execute step 3.2; if not, execute step 3.4; Step 3.2: First, judge whether the container lid is properly closed through the lid detection structure. If so, continue to execute step 3.3; if not, prompt that the container lid is not placed, and repeat step 3.2; Step 3.3: Then judge whether the locking structure is locked through the lid closing detection structure. If so, the detection is completed and cooking starts; if not, control the locking structure to lock, and repeat step 3.3; Step 3.4: Classify according to the recipe type, determine whether the current recipe type is a type B recipe. If so, continue to execute step 3.5; if not, execute step 3.7; Step 3.5: First, judge whether the container lid is properly closed through the lid detection structure. If so, continue to execute step 3.6; if not, prompt that the container lid is not placed, and repeat step 3.5; Step 3.6: Then, determine whether the locking structure is open through the lid-closure detection structure. If it is, the detection is completed and cooking starts; if not, control the locking structure to open and repeat Step 3.6; Step 3.7: Classify according to the recipe type and determine whether the current recipe type is a Class C recipe. If it is, continue to execute Step 3.8; Step 3.8: Determine whether the locking structure is open through the lid-closure detection structure. If it is, the detection is completed and cooking starts; If not, control the locking structure to open and repeat Step 3.8.

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