Control methods, computer-readable storage media, and cooking appliances

Abstract

This application provides a control method, a computer-readable storage medium, and a cooking appliance. The control method includes: controlling a drive motor to rotate in a first rotation direction, causing a rotating frame to rotate under the drive motor's influence, thereby moving a fastening member towards a fastening position; a potentiometer drive unit, in conjunction with a potentiometer, continuously changing a detected parameter of the potentiometer during at least a portion of the movement of the fastening member. The detected parameter of the potentiometer is acquired; the real-time position of the fastening member is determined based on the detected parameter; and it is determined whether the fastening member has reached the fastening position based on the real-time position. If so, the drive motor is controlled to stop rotating; otherwise, the drive motor is controlled to continue rotating. This application, by using a potentiometer instead of a microswitch in related technologies, not only determines whether the fastening member has reached the fastening position but also helps to acquire other real-time positions of the fastening member besides the fastening position, facilitating more precise control of the motor's operation and changes in the position of the fastening member.

Description

Technical Field

[0001] This application relates generally to the technical field of cookware, and more specifically to a control method, a computer-readable storage medium, and a cooking appliance. Background Technology

[0002] In related technologies, smart pressure cookers use two microswitches to detect whether the fastening components are properly engaged or disengaged. These two microswitches are typically controlled independently, increasing the likelihood of malfunction. Furthermore, since microswitches only have two states—on and off—they cannot reflect the intermediate states in real time, resulting in a poor user experience. Summary of the Invention

[0003] The summary section introduces a series of simplified concepts, which will be further explained in detail in the detailed description section. This summary section is not intended to limit the key and essential technical features of the claimed technical solution, nor is it intended to determine the scope of protection of the claimed technical solution.

[0004] To at least partially solve the above problems, the first aspect of this application provides a control method for cooking appliances.

[0005] The cooking appliance includes a lid;

[0006] The cover is provided with a drive motor, a rotating frame and a fastening component. The rotating frame is connected to the drive motor and can be driven by the drive motor to rotate. The fastening component is connected to the rotating frame and can be driven by the rotating frame to move between a fastened position and a disengaged position.

[0007] The cover is equipped with a potentiometer, and the rotating frame is equipped with a potentiometer drive unit that is linked to the potentiometer and can change the detected parameter of the potentiometer.

[0008] The control method includes:

[0009] The drive motor is controlled to rotate in a first rotation direction so that: the rotating frame is driven by the drive motor to rotate, thereby moving the fastening member toward the fastening position; the potentiometer drive unit is linked to the potentiometer to continuously change the detected parameter of the potentiometer during at least a part of the movement of the fastening member.

[0010] Obtain the detected parameters of the potentiometer;

[0011] The real-time position of the fastener is determined based on the detected parameters;

[0012] Determine whether the fastening component has reached the fastening position based on the real-time position;

[0013] If yes, control the drive motor to stop rotating; otherwise, control the drive motor to continue rotating.

[0014] According to the control method of the first aspect of this application, during the rotation of the drive motor in the first rotation direction, the real-time position of the fastening element can be determined based on the detected parameters of the potentiometer. Based on the real-time position, it can be determined whether the fastening element has reached the fastening position. If it has not reached the fastening position, the drive motor is controlled to continue rotating; if it has reached the fastening position, the drive motor is controlled to stop rotating. This application, by using a potentiometer instead of the microswitch in related technologies, not only determines whether the fastening element has reached the fastening position, but also helps to determine other real-time positions of the fastening element besides the fastening position, thereby facilitating more precise control of the drive motor's operation and changes in the position of the fastening element.

[0015] Optionally, the parameter being detected is a voltage signal;

[0016] When the fastening element is in the fastening position, the angle of the rotating frame is the first target angle;

[0017] The method for determining the position of the fastener based on the voltage signal includes:

[0018] The real-time angle corresponding to the rotating frame at the real-time position is determined based on the voltage signal and the voltage-angle correspondence table, and it is determined whether the real-time angle has reached the first target angle. If the real-time angle has reached the first target angle, it is determined that the fastening member has reached the fastening position.

[0019] According to this application, the real-time angle can be obtained based on the voltage signal and by looking up a table, and the fastener is determined to be in the fastening position when the real-time angle reaches the first target angle.

[0020] Optionally, the parameter being detected is a voltage signal;

[0021] When the fastening element is in the fastening position, the angle of the rotating frame is the first target angle;

[0022] The method for determining whether the fastening element has reached the fastening position based on the voltage signal includes:

[0023] The real-time angle at which the rotating frame is located at the real-time position is determined based on the voltage signal and the voltage-angle correspondence table. It is then determined whether the real-time angle is equal to the first target angle. If not, the drive motor is first controlled to rotate along the second rotation direction, and then the drive motor is controlled to rotate along the first rotation direction.

[0024] According to this application, when the real-time angle has not reached the first target angle, the drive motor can be controlled to rotate in the second rotation direction and then in the first rotation direction, so as to re-determine whether the fastening part can reach the fastening position and reduce the probability of misjudgment.

[0025] Optionally, when the fastener is in the disengaged position, the angle of the rotating frame is the second target angle;

[0026] As the drive motor rotates along the first rotation direction, the real-time angle of the rotating frame gradually approaches the first target angle. As the drive motor rotates along the second rotation direction, the real-time angle of the rotating frame gradually approaches the second target angle, and the second target angle is smaller than the first target angle.

[0027] According to this application, by controlling the drive motor to rotate in a first rotation direction, the real-time angle of the rotating frame is made close to the first target angle, thereby driving the fastening member to move towards the fastening position. By controlling the drive motor to rotate in a second rotation direction, the real-time angle of the rotating frame is made close to the second target angle, thereby driving the fastening member to move towards the disengagement position.

[0028] Optionally, the method for determining whether the real-time angle has reached the first target angle includes:

[0029] If the real-time angle is less than the first target angle, and the difference between the real-time angle and the first target angle is greater than the allowable deviation angle, then it is determined that the real-time angle has not reached the first target angle.

[0030] If the difference between the real-time angle and the first target angle is less than or equal to the allowable deviation angle, then it is determined that the real-time angle has reached the first target angle.

[0031] According to this application, when the real-time angle is less than the first target angle and the difference between the real-time angle and the first target angle is greater than the allowable deviation angle, it can be determined that the real-time angle has not reached the first target angle, thereby determining that the fastening element has not reached the fastening position. When the difference between the real-time angle and the first target angle is less than or equal to the allowable deviation angle, it can be determined that the real-time angle has reached the first target angle, thereby determining that the fastening element has reached the fastening position.

[0032] Optionally, the method of first controlling the drive motor to rotate in the second rotation direction and then controlling the drive motor to rotate in the first rotation direction includes:

[0033] During the rotation of the drive motor along the second rotation direction, the voltage signal of the potentiometer is acquired, and it is determined whether the fastening member has reached the disengagement position based on the voltage signal. If the fastening member has reached the disengagement position, the drive motor is controlled to stop rotating along the second rotation direction and start rotating along the first rotation direction.

[0034] According to this application, when the drive motor rotates in the second rotation direction until the fastening member reaches the disengagement position, it switches to rotating in the first rotation direction. This reduces the complexity of the control method and improves the accuracy of the control.

[0035] Optionally, the parameter being detected is a voltage signal;

[0036] When the fastener is in the disengaged position, the angle of the rotating frame is the second target angle.

[0037] After receiving the cooking completion signal, the drive motor is controlled to rotate in the second rotation direction, so that the rotating frame drives the fastening member to move towards the disengaged position.

[0038] The real-time voltage signal of the potentiometer is acquired, and the real-time angle at which the rotating frame is located at the real-time position is determined according to the voltage signal and the voltage-angle correspondence table. It is then determined whether the real-time angle is equal to the second target angle. If so, the drive motor is controlled to stop rotating.

[0039] According to this application, after cooking is completed, the drive motor is controlled to rotate in the second rotation direction. When the real-time angle at which the rotating frame stops is determined to be equal to the second target angle based on the voltage signal of the potentiometer and the voltage-angle correspondence table, it can be determined that the fastener has reached the disengagement position. The drive motor is then controlled to stop, thereby reliably and accurately controlling the fastener to move to the disengagement position.

[0040] Optionally, the method for determining whether the fastener has reached the disengaged position based on the voltage signal includes:

[0041] Based on the voltage signal and the voltage-angle correspondence table, determine the real-time angle at which the rotating frame is located at the real-time position, and determine whether the real-time angle has reached the second target angle. If so, determine that the fastener has reached the disengagement position.

[0042] According to this application, the real-time angle can be obtained based on the voltage signal and by looking up a table, and the fastener is determined to have reached the disengagement position when the real-time angle reaches the second target angle.

[0043] Optionally, during the process of the drive motor rotating in the first rotation direction, the real-time angle of the rotating frame gradually approaches the first target angle, and during the process of the drive motor rotating in the second rotation direction, the real-time angle of the rotating frame gradually approaches the second target angle, wherein the second target angle is smaller than the first target angle.

[0044] According to this application, by controlling the drive motor to rotate in a first rotation direction, the real-time angle of the rotating frame is made close to the first target angle, thereby driving the fastening member to move towards the fastening position. By controlling the drive motor to rotate in a second rotation direction, the real-time angle of the rotating frame is made close to the second target angle, thereby driving the fastening member to move towards the disengagement position.

[0045] Optionally, the method for determining whether the real-time angle has reached the second target angle includes:

[0046] If the real-time angle is greater than the second target angle, and the difference between the real-time angle and the second target angle is greater than the allowable deviation angle, then it is determined that the real-time angle has not reached the second target angle.

[0047] If the difference between the real-time angle and the second target angle is less than or equal to the allowable deviation angle, then it is determined that the real-time angle has reached the second target angle.

[0048] According to this application, if the real-time angle is greater than the second target angle, and the difference between the real-time angle and the second target angle is greater than the allowable deviation angle, it can be determined that the real-time angle has not reached the second target angle, thereby determining that the fastener has not reached the disengagement position. If the difference between the real-time angle and the second target angle is less than or equal to the allowable deviation angle, it can be determined that the real-time angle has reached the second target angle, thereby determining that the fastener has reached the disengagement position.

[0049] A second aspect of this application provides a computer-readable storage medium storing a computer program that, when executed, implements the control method described above.

[0050] According to the computer-readable storage medium of the second aspect of this application, a computer program can be stored so that, when executed, the above-described control method can be implemented. By applying the above-described control method, it is possible to determine whether the fastening member has reached the fastening position, and it also helps to obtain other real-time positions of the fastening member besides the fastening position, so as to accurately control the operation of the motor.

[0051] A third aspect of this application provides a cooking appliance, the cooking appliance comprising:

[0052] The pot body includes a pot inner for containing food ingredients;

[0053] A lid, which is foldably disposed on the pot body;

[0054] A locking and opening assembly is movably disposed on the lid body, and the locking and opening assembly has a latching state that locks the inner pot and the lid body and a disengaging state that releases the inner pot and the lid body.

[0055] A drive motor, which is connected to the cover locking and opening assembly;

[0056] A potentiometer, wherein the potentiometer is disposed on the cover, the potentiometer having a movable part connected to the cover locking / unlocking assembly; and

[0057] A control unit is electrically connected to the drive motor and the potentiometer. The control unit is configured to control the drive motor to drive the cover opening assembly to switch between the latched state and the disengaged state, and simultaneously acquire the detected parameters of the potentiometer and determine the state of the cover opening assembly based on the detected parameters.

[0058] According to the cooking appliance of the third aspect of this application, by using a potentiometer instead of the microswitch in the related technology, it is not only possible to determine whether the fastening part has reached the fastening position or the disengagement position, but also to obtain other real-time positions of the fastening part other than the fastening position and the disengagement position, so as to more accurately control the operation of the motor and change the position of the fastening part.

[0059] Optionally, the cover opening assembly includes a rotating frame and a fastening member. The rotating frame is connected to and can be driven by the drive motor to rotate. The fastening member is connected to the rotating frame and can be moved by the rotating frame between a fastened position and a disengaged position.

[0060] When the fastening element is in the fastening position, the cover opening assembly is in the fastening state;

[0061] When the fastener is in the disengaged position, the cover opening assembly is in the disengaged state;

[0062] The rotating frame is equipped with a potentiometer drive unit that is linked to the movable part of the potentiometer and can change the detected parameters of the potentiometer.

[0063] According to this application, a rotating frame can be driven by a drive motor to rotate, thereby moving the fastening element between a fastened position and a disengaged position. The cover-opening assembly is in a fastened state when the fastening element is in the fastened position, and in a disengaged state when the fastening element is in the disengaged position. The rotating frame is linked to the movable part of the potentiometer via a potentiometer drive unit, thereby changing the detected parameter of the potentiometer while rotating, thus facilitating the determination of the real-time angle at which the rotating frame stops and whether the fastening element has moved into position.

[0064] Optionally, the parameter being detected is an AD voltage value;

[0065] When the fastening component is in the fastening position, the rotating frame is located at the first target angle, and the detected parameter of the potentiometer is the first AD voltage value;

[0066] When the fastener is in the disengaged position, the rotating frame is located at the second target angle, and the detected parameter of the potentiometer is the second AD voltage value;

[0067] The second target angle is smaller than the first target angle.

[0068] According to this application, the real-time angle of the rotating frame can be determined based on the AD voltage value of the potentiometer. When the detected parameter of the potentiometer is a first AD voltage value, it is determined that the rotating frame is located at a first target angle and the fastener is in the fastened position. When the detected parameter of the potentiometer is a second AD voltage value, it is determined that the rotating frame is located at a second target angle and the fastener is in the disengaged position.

[0069] Optionally, the rotating frame is rotatably connected to the cover about a first axis. The rotating frame includes a guide hole whose extending direction intersects the radial direction of the cover. The fastening member is slidably connected to the guide hole along the extending direction. The rotating frame is connected to the drive motor to move the fastening member under the drive of the drive motor. The potentiometer drive part of the rotating frame is connected to the movable part.

[0070] According to this application, by providing a guide hole in the rotating frame, the fastening member is driven to move relative to the rotating frame in the extension direction of the guide hole while the rotating frame rotates, thereby causing the fastening member to move between a fastened position and a disengaged position, so as to change the connection state of the fastening member between the lid and the inner pot. When the fastening member is in the fastened position, it can prevent the lid from being opened; when the fastening member is in the disengaged position, it can allow the lid to be opened.

[0071] Optionally, the cover includes a cover body, the cover body being provided with a float component; the rotating frame is connected to the cover body, the rotating frame being provided with a limiting hole for engaging with the float component; when the cover locking and opening assembly is in the locked state, the position of the float component is aligned with the position of the limiting hole, or the float component is located in the limiting hole.

[0072] According to this application, when the locking and unlocking assembly is in the locked state, if the cooking space is not pressed up, the position of the float component is aligned with the position of the limiting hole, but the float component is not located in the limiting hole, so that it can move into the limiting hole when pressed up. If the cooking space is not pressed up, the float component is located in the limiting hole, thereby preventing the rotating frame from rotating.

[0073] Optionally, the rotating frame includes a frame and a connecting beam spanning the frame, and the limiting hole is located at the intersection of the connecting beam or two connecting beams; when the cover opening assembly is not in the locked state, the position of the float component is offset from the position of the limiting hole.

[0074] According to this application, if the rotating frame is not rotated into place along the direction of the locking cover, the position of the float component is misaligned with the limiting hole, so the float component cannot form an anti-rotation engagement with the rotating frame when it is pressed up in the cooking space.

[0075] Optionally, the rotating frame is rotatably connected to the cover about a first axis;

[0076] The drive motor is located on the circumferential outer side of the rotating frame; the cooking appliance also includes a transmission connector, one end of which is rotatably connected to the cover and transmissionally connected to the drive motor around a second axis, and the other end is movably connected to the rotating frame, the second axis being parallel to the first axis.

[0077] According to this application, by adding a transmission connector between the drive motor and the rotating frame, the power of the drive motor can be transmitted to the rotating frame through the transmission connector, thereby facilitating the rational arrangement of the positions of the rotating frame and the drive motor.

[0078] Optionally, the rotating frame includes a frame with a transmission hole extending radially in a circle centered on the first axis.

[0079] The end of the transmission connector away from the motor has a connecting shaft, which is movably connected to the transmission hole.

[0080] According to this application, a transmission hole is provided on the frame of the rotating frame, and a connecting shaft for movably connecting with the transmission hole is provided on the transmission connector, thereby achieving a movable connection between the transmission connector and the rotating frame. Since the transmission hole extends radially in a circle centered on the first axis, interference between the transmission connector and the rotating frame can be prevented.

[0081] Optionally, the transmission connector extends in a direction intersecting the second axis. The transmission connector has a first end and a second end. The first end is connected to the motor shaft of the drive motor, and the second end is movably connected to the rotating frame. In a direction perpendicular to the extension direction of the transmission connector and the second axis, the size of the first end is larger than the size of the second end.

[0082] According to this application, this ensures the strength of the connection structure between the transmission connector and the motor shaft. Simultaneously, it saves space at the second end of the transmission connector, thereby reducing or avoiding interference between the second end and adjacent structures, and improving the flexibility of movement at the second end.

[0083] Optionally, the rotating rack includes a limiting hole; the cooking appliance includes a float component, which is movably mounted on the cover between a normal pressure position and a pressure position. When the float component is in the pressure position, it is inserted into the limiting hole to prevent the rotating rack from rotating, and when the float component is in the pressure position, it is disengaged from the limiting hole to allow the rotating rack to rotate.

[0084] According to this application, by adding a float component, the rotating frame can be stopped from rotating when pressure is applied to the cooking space. Attached Figure Description

[0085] The following drawings, illustrating embodiments of this application, are incorporated herein by reference and are used to understand this application. The drawings illustrate embodiments of this application and their descriptions, serving to explain the principles of this application. In the drawings,

[0086] Figure 1 A cross-sectional view of a cooking appliance according to a preferred embodiment of this application;

[0087] Figure 2 An exploded view of a cooking appliance according to a preferred embodiment of this application;

[0088] Figure 3 A perspective view of a cooking appliance without a lid according to a preferred embodiment of this application;

[0089] Figure 4 for Figure 3 A cross-sectional view of the lid of a cooking utensil excluding the top cover;

[0090] Figure 5 for Figure 3 A schematic diagram of the rotating frame in the diagram;

[0091] Figure 6 for Figure 3 The image shows a top view of a cooking appliance without a lid, with the fasteners in the engaged position.

[0092] Figure 7 for Figure 3 Another top view of the cooking appliance shown without the lid, with the fasteners in the disengaged position;

[0093] Figure 8 for Figure 3 A top view of the assembly of the transmission connector and the drive motor in the middle;

[0094] Figure 9 for Figure 8 The cross-sectional view of the assembly of the transmission connector and the drive motor shown; and

[0095] Figure 10 This is a flowchart of a control method for a cooking appliance according to a preferred embodiment of this application.

[0096] Explanation of reference numerals in the attached figures:

[0097] 100: Pot body 101: Inner pot

[0098] 102: Lid opening torsion spring; 110: Lid body

[0099] 110a: Steam passage; 110b: Steam vent

[0100] 110c: Guide surface; 111: Cover

[0101] 112: Liner 113: Inner Cover

[0102] 1131: Inner cover sealing ring; 114: Steam valve

[0103] 116: Control circuit board; 117: Cover body

[0104] 120: Electric pressure relief device; 121: Pressure ball

[0105] 122: Pressure relief drive component; 123: Push rod

[0106] 130: Cover locking and opening assembly; 131: Fastening component

[0107] 132: Rotating bracket; 132a: Guide hole

[0108] 132b: Limiting hole; 132c: Potentiometer drive section

[0109] 132d: Transmission boss; 132e: Transmission hole

[0110] 132g: First clearance gap; 132h: Border

[0111] 132i: Connecting beam; 132j: Connecting crossbeam

[0112] 132k: First connecting longitudinal beam; 132m: Second connecting longitudinal beam

[0113] 132n: Second clearance gap; 132p: Clearance slot

[0114] 132r: Intersection part; 133: Transmission connector

[0115] 133a: First end 133a1: Snap-fit ​​boss

[0116] 133b: Second end; 133c: Connecting shaft

[0117] 134: Drive motor; 134a: Motor shaft

[0118] 134b: Snap-fit ​​recess; 135: Lever.

[0119] 136: Float component; 137: Guide connector.

[0120] 138: Potentiometer; 138a: Movable part

[0121] 160: Cover hook

[0122] P1: First extreme position P2: Second extreme position

[0123] P3: Third limit position P4: Fourth limit position

[0124] AX: Rotation axis; AX1: First axis

[0125] AX2: Second axis; R1: First direction of rotation

[0126] R2: Second rotation direction; D1: Forward / backward direction.

[0127] D2: Left / Right direction; D3: Height direction Detailed Implementation

[0128] In the following description, numerous specific details are set forth to provide a more thorough understanding of this application. However, it will be apparent to those skilled in the art that embodiments of this application may be practiced without one or more of these details. In other instances, certain technical features well-known in the art have not been described to avoid confusion with embodiments of this application.

[0129] To fully understand the embodiments of this application, a detailed structure will be presented in the following description. Obviously, the implementation of the embodiments of this application is not limited to the specific details familiar to those skilled in the art.

[0130] It should be understood that the terminology used herein is intended only to describe particular embodiments and is not intended to limit the scope of this application. The singular forms “a,” “an,” and “the” / “the” are also intended to include the plural forms unless the context clearly indicates otherwise. When the terms “comprising” and / or “including” are used in this specification, they indicate the presence of the stated features, integrals, steps, operations, elements, and / or components, but do not exclude the presence or addition of one or more other features, integrals, steps, operations, elements, components, and / or combinations thereof.

[0131] The ordinal numbers such as "first" and "second" used in this application are merely identifiers and have no other meaning, such as a specific order. Furthermore, for example, the term "first component" does not imply the existence of a "second component," and the term "second component" does not imply the existence of a "first component." It should be noted that the terms "upper," "lower," "front," "rear," "left," "right," "inner," "outer," and similar expressions used in this application are for illustrative purposes only and are not intended to be limiting.

[0132] The terms “parallel” / “perpendicular” and similar expressions used in this application include absolute parallel / perpendicular relationships and approximately parallel / perpendicular relationships (e.g., relationships that differ from absolute parallel / perpendicular relationships by a range of -5° to +5°), and have equivalent effects.

[0133] The specific embodiments of this application will be described in more detail below with reference to the accompanying drawings, which illustrate representative embodiments of this application and are not intended to limit this application.

[0134] like Figures 1 to 9 As shown, this application provides a cooking appliance. The cooking appliance may include a pot body 100, a lid 110, an electric pressure relief device 120, a position detection device, a temperature detection device, and a control unit.

[0135] The pot body 100 is used for cooking food. The lid 110 is used to cover the pot body 100. For example, the lid 110 is connected to the pot body 100 in an openable and closable manner to cover the pot body 100. When the lid 110 covers the pot body 100, a cooking space is formed between the lid 110 and the pot body 100.

[0136] The pot body 100 includes a pot inner 101, a heating device (not shown), a control unit, and a temperature detection device (not shown). The pot inner 101, used to hold food, is removably installed in the pot body 100. When the lid 110 closes the pot body 100, a cooking space is formed between the lid 110 and the pot inner 101. The cooking space can also be referred to as a cooking cavity. The heating device can be configured as a heating plate, heating coil, or other heating device. The heating device is located at the bottom of the pot body 100 and below the pot inner 101 to heat the food in the pot inner 101. The control unit can be a microcontroller unit (MCU) for controlling the cooking process. The control unit can be located on a control circuit board 116, which will be described below. The temperature detection device is used to detect the temperature or pressure of the cooking space or related to the cooking space. The temperature or pressure here can be instantaneous temperature or instantaneous pressure. The temperature detection device can include a bottom temperature detection device and a top temperature detection device. The bottom temperature detection device can be located at the bottom or side of the pot body. A bottom temperature sensor is used to directly or indirectly detect the temperature at the bottom of the cooking space. A top temperature sensor, for example, is installed on the lid to detect the temperature at the top of the cooking space. Both the heating element and the temperature sensor are electrically connected to the control unit. The temperature sensor feeds back the sensed temperature information to the control unit, allowing the control unit to perform more precise control over components such as the heating element based on the temperature information. The control unit can determine the instantaneous air pressure based on the received temperature information using methods such as looking up a table, thereby converting the instantaneous temperature into air pressure. In other examples, the sensor can also be a pressure sensor. The pressure sensor is used to directly detect the air pressure within the cooking space.

[0137] See Figures 2 to 4 In this application, one end of the lid 110 in the front-rear direction D1 is rotatably connected to the pot body 100 via a pivot axis about the rotation axis AX. An opening torsion spring 102 is disposed on the pivot axis. The two ends of the opening torsion spring 102 abut against the lid 110 and the pot body 100 respectively, allowing the opening torsion spring 102 to apply an elastic force away from the pot body 100 to the lid 110. When the lid 110 is opened, the lid 110 can spring upwards and rotate about the pivot axis under the elastic force of the opening torsion spring 102. The other end of the lid 110 in the front-rear direction D1 is detachably connected to the pot body 100 via a lid-closing hook 160, such as... Figure 3 and Figure 4 As shown.

[0138] See Figure 2The lid 110 includes a top cover 111, a liner 112, and an inner cover 113. In addition, the lid 110 may also include electrical components, valve components, etc. Therefore, the assembly of the top cover 111, liner 112, and inner cover 113 can also be referred to as the lid body 117. It is understood that the lid body 117 may only have the degree of freedom to rotate about the axis of rotation AX relative to the pot body 100. The top cover 111 is located at the outermost (i.e., uppermost) side of the lid body 110, forming the outer shell of the lid body 110. The liner 112 is located below the top cover 111 and is connected to the top cover 111. For example, the liner 112 can be connected to the top cover 111 via fasteners, snap-fit ​​connectors, etc. The liner 112 is mainly used to centrally mount various functional components of the lid body 110 that sense and control the working status of the cooking appliance, such as sensors. The inner cover 113 is located at the innermost (i.e., lowermost) side of the lid body 110 and is located below the liner 112. The inner lid 113 is detachably connected to the liner 112 via a snap-fit ​​or other detachable connector for easy cleaning and replacement. The inner lid 113 is oriented towards the cooking space. That is, when the lid 110 is closed on the pot body 100, the inner lid 113 is located directly above the cooking space. Furthermore, an inner lid sealing ring 1131 is provided on the outer periphery of the inner lid 113. The inner lid sealing ring 1131 is used to seal the gap between the inner lid 113 and the pot body 101 when the inner lid 113 is closed with the pot body 101.

[0139] See Figure 2 The cover 111 may further include a cover body 111a and a panel 111b. In one example, a first receiving cavity 111a1 is formed between the cover body 111a and the panel 111b. The first receiving cavity 111a1 may be recessed on the upper surface of the cover body 111a and have a raised structure on the lower surface of the cover body 111a. The first receiving cavity 111a1 may accommodate a control circuit board 116. The control circuit board 116 includes a control unit. The first receiving cavity 111a1 may be referred to as a circuit board receiving structure or a circuit board receiving portion.

[0140] See Figures 2 to 4 For example, a steam valve 114 is provided on the cover 110. The steam valve 114 has a steam vent (not shown in the figure) that communicates with the outside environment. A steam passage 110a, communicating with the steam valve 114, is also provided inside the cover 110. The cooking space is connected to the external environment through the steam passage 110a and the steam valve 114. The external environment refers to the environment outside the cooking appliance. In this application, the steam valve 114 is used to connect the cooking space with the external environment to release steam generated during cooking.

[0141] An electric pressure relief device 120 is disposed on the cover 110. The electric pressure relief device 120 has an open state for opening the steam passage 110a and a closed state for closing the steam passage 110a. The detection device is a temperature detection device. A control unit is electrically connected to the temperature detection device and the electric pressure relief device 120. The control unit is configured to control the electric pressure relief device 120 to switch between the open and closed states based on the temperature within the cooking space detected by the temperature detection device.

[0142] According to the cooking appliance of this application, the control unit can control the electric pressure relief device 120 to switch between an open state and a closed state based on the temperature detected by the temperature detection device, thereby relieving pressure in the cooking space, which can greatly reduce the pressure and safety risks in the cooking space, thus improving the safety of the cooking appliance and greatly enhancing the user experience.

[0143] See Figure 4 For example, the electric pressure relief device 120 may include a pressure ball 121 and a pressure relief drive 122. The pressure ball 121 is movably disposed on the cover 110. The pressure ball 121 can move between an open position and a closed position. When in the open position, the pressure ball 121 opens the steam passage 110a. When in the closed position, the pressure ball 121 closes the steam passage 110a. When the pressure ball 121 is in the open position, the electric pressure relief device 120 is in the open state. When the pressure ball 121 is in the open position, the steam passage 110a connects to the external environment and the cooking space, thereby balancing or relatively balancing the air pressure of the external environment with the air pressure of the cooking space. When the pressure ball 121 is in the closed position, the electric pressure relief device 120 is in the closed state. When the pressure ball 121 is in the closed position, the steam passage 110a is blocked by the pressure ball 121, thereby disconnecting the cooking space from the external environment to enable cooking functions requiring pressurization or pressure increase. The pressure relief drive 122 is driven to the pressure ball 121. The pressure relief drive 122 is used to actuate the pressure ball 121 to change the position of the pressure ball 121.

[0144] According to this application, the electric pressure relief device 120 specifically drives the pressure ball 121 to move between an open position and a closed position via a pressure relief drive 122, thereby switching between the open and closed states. When the pressure ball 121 is in the open position, the cooking appliance can release pressure.

[0145] See Figures 4 to 7Optionally, the pressure relief actuator 122 is a push-pull electromagnet. The push-pull electromagnet includes a coil and an iron core. When the coil is energized, the iron core extends or retracts, thereby pushing or pulling the pressure ball 121. When the coil is de-energized, the iron core retracts or extends, thereby pulling or pushing the pressure ball 121. In one example, the pressure ball 121 is in the open position when the coil is de-energized. In another example, the pressure ball 121 is in the closed position when the coil is de-energized.

[0146] In some embodiments, the core of the electromagnet directly or indirectly abuts against the pressure ball 121. When pressure is not required in the cooking space or pressure relief is required, the core pushes the pressure ball 121 away from the steam passage 110a, i.e., it remains open. When pressure is required in the cooking space or pressure relief is not required, the core of the electromagnet retracts, and the pressure ball 121 blocks the steam passage 110a.

[0147] See Figure 4 In this embodiment, the steam passage 110a includes a steam hole 110b for the flow of steam. A guide surface 110c is provided within the steam passage 110a. The guide surface 110c is located at least on the side of the steam hole 110b furthest from the push-pull electromagnet. The following description will further elaborate on the state where the lid 110 is closed onto the pot body 100. The guide surface 110c can be configured as an inclined surface in the height direction D3 of the cooking appliance. The lowest point of the guide surface 110c is arranged corresponding to the outlet of the steam hole 110b of the steam passage 110a. When the coil is energized, the iron core retracts, and the pressure ball 121 is located at the outlet of the steam hole 110b to block the steam passage 110a. When the coil is de-energized, the iron core extends, pushing the pressure ball 121 to a higher position on the guide surface 110c, and the pressure ball 121 opens the steam hole 110b.

[0148] According to this application, the pressure ball 121 is actuated by using a push-pull electromagnet as the pressure relief drive 122, which is simple and convenient.

[0149] Continue reading Figure 4 Optionally, the electrically operated pressure relief device 120 may include a push rod 123. One end of the push rod 123 is connected to a pressure ball 121. The other end of the push rod 123 is connected to a push-pull electromagnet. For example, the other end of the push rod 123 is connected to the core of the push-pull electromagnet.

[0150] According to this application, by adding a push rod 123 between the pressure ball 121 and the push-pull electromagnet, the flexibility of the electromagnet and the pressure ball 121 in physical space can be improved.

[0151] See Figure 2For example, with the lid 110 closed on the pot body 100, a cooking space is formed between the inner pot 101 and the inner lid 113. The inner lid 113 has radial and axial aspects. The radial aspect is the radial direction of a circle with the geometric center of the inner lid 113. The axial aspect is the direction passing through the geometric center of the inner lid 113 and parallel to the thickness direction of the inner lid. Here, the geometric center of the inner lid 113, in the example where the inner lid is circular, is the exact center or center of the circle of the inner lid. The cooking appliance may also include a lid locking / unlocking assembly 130 and a power source. The lid locking / unlocking assembly 130 is connected to the power source to switch between a locked state and a disengaged state under the drive of the power source. In the locked state, the lid locking / unlocking assembly 130 prevents the inner lid 113 of the lid body 110 from separating from the inner pot 101. In the disengaged state, the lid locking / unlocking assembly 130 allows the inner lid 113 to separate from the inner pot 101. The lid-locking and opening assembly 130 includes a fastening element 131. The fastening element 131 may also be referred to as a hook, latch, or grab. The fastening element 131 is movably connected to the lid body 110 in a locked and unlocked position along the radial direction of the inner lid 113. The lid-locking and opening assembly 130 is in a locked state when the fastening element 131 is in the locked position. The lid-locking and opening assembly 130 is in a unlocked state when the fastening element 131 is in the unlocked position. The fastening element 131 may include a clamp for receiving the edges of the inner pot 101 and the inner lid 113. When the fastening element 131 is in the locked position, the edges of the inner pot 101 and the inner lid 113 are clamped in the clamp to limit the inner pot 101 and the inner lid 113 in the height direction D3 of the cooking appliance, thereby preventing the inner pot 101 and the inner lid 113 from disengaging from each other, and thus ensuring that the cooking space can be pressurized. When the fastener 131 is in the disengaged position, the clamp disengages from at least one of the edges of the inner pot 101 and the inner cover 113. Preferably, the fastener 131 in the disengaged position disengages from the inner pot 101. The power source can be a drive motor 134. The drive motor 134 is drivenly connected to the fastener 131. The drive motor 134 is connected to a control unit to drive the fastener 131 to move between the fastened and disengaged positions under the control of the control unit.

[0152] According to this application, the fastening member 131 is moved between a fastened position and a disengaged position by a drive motor 134, thereby changing the connection state between the fastening member 131 and the inner cover 113 and the pot liner 101. When the fastening member 131 is in the fastened position, it can prevent the inner cover 113 and the pot liner 101 from separating, so that the pot liner 101, the inner cover 113, and the fastening member 131 can share the pressure. When the fastening member 131 is in the disengaged position, it can allow the inner cover 113 to separate from the pot liner 101, thereby facilitating the opening of the lid 110.

[0153] Continue reading Figures 2 to 7Furthermore, the cover opening and closing assembly 130 may also include a rotating frame 132. The rotating frame 132 is rotatably connected to the cover body 110 about a first axis AX1. The rotating frame 132 may include a guide hole 132a. The extending direction of the guide hole 132a intersects the radial direction of the cover body 110. In other words, the extending trajectory of the guide hole 132a intersects the radial direction of the cover body 110. The radial direction of the cover body 110 may be a radial direction passing through and perpendicular to the first axis AX1. The extending direction of the guide hole 132a may be a straight line or a curved direction. The fastening member 131 is slidably connected to the guide hole 132a along the extending direction of the guide hole 132a. The rotating frame 132 is drively connected to the drive motor 134.

[0154] According to this application, a rotating frame 132 is provided between the drive motor 134 and the fastening member 131, so that the power of the drive motor 134 is transmitted to the fastening member 131 through the rotating frame 132, thereby driving the fastening member 131 to move by rotating the rotating frame 132. During the process of the drive motor 134 driving the rotating frame 132 to rotate, the fastening member 131 slides relative to the rotating frame 132 along the extension direction of the guide hole 132a, thereby realizing the movement of the fastening member 131 between the fastening position and the disengaging position.

[0155] See Figures 2 to 7 Optionally, the fastening member 131 is connected to the guide hole 132a via a guide connector 137. The guide connector 137 may include fasteners such as screws or bolts. The guide connector 137 is connected to the fastening member 131. The guide connector 137 is located in the guide hole 132a and is movable relative to the guide hole 132a. During the rotation of the rotating frame 132, the fastening member 131 slides relative to the rotating frame 132 along the extension direction of the guide hole 132a through the sliding engagement of the guide connector 137 and the guide hole 132a, thereby causing the fastening member 131 to move radially in the inner cover 113 by the rotation of the rotating frame 132.

[0156] See Figure 3 , Figures 6 to 8Furthermore, the cover-opening assembly 130 may also include a transmission connector 133. The transmission connector 133 has opposite first ends 133a and second ends 133b. The first end 133a is rotatably connected to the cover 110 about a second axis AX2. The first end 133a is connected to the motor shaft 134a of the drive motor 134 to rotate synchronously with the motor shaft 134a. The second end 133b is movably connected to the rotating frame 132. The second axis AX2 is parallel to the first axis AX1. During the rotation of the motor shaft 134a of the drive motor 134, the transmission connector 133 rotates in the same direction as the motor shaft 134a of the drive motor 134. During the rotation of the motor shaft 134a of the drive motor 134, the rotation direction of the transmission connector 133 is opposite to the rotation direction of the rotating frame 132. Figure 6 As shown, the motor shaft 134a has a first rotation direction R1 and a second rotation direction R2. The first rotation direction R1 and the second rotation direction R2 are opposite. The first rotation direction R1 can be understood as counterclockwise. Correspondingly, the second rotation direction R2 can be understood as clockwise. During the rotation of the transmission connector 133 along the motor shaft 134a in the first rotation direction R1, the rotating frame 132 rotates in the second rotation direction R2, which is opposite to the first rotation direction R1, causing the fastening member 131 to move towards the fastening position. During the rotation of the transmission connector 133 along the motor shaft 134a in the second rotation direction R2, the rotating frame 132 rotates in the first rotation direction R1, causing the fastening member 131 to move towards the disengagement position.

[0157] According to this application, a transmission connector 133 is added between the drive motor 134 and the rotating frame 132 to transmit the power of the drive motor 134 to the rotating frame 132 through the transmission connector 133, thereby facilitating the reasonable arrangement of the positions of the rotating frame 132 and the drive motor 134.

[0158] See Figure 3 , Figure 6 as well as Figure 7In some examples, the cooking appliance includes a position detection device for detecting the position of the latch 131. The position detection device is a potentiometer 138. The potentiometer 138 is located on the lid 110. The potentiometer 138 has a movable portion 138a. The movable portion 138a is connected to a potentiometer drive portion 132c of the rotating frame 132 of the lid-opening assembly 130. The potentiometer drive portion 132c may also be referred to as a potentiometer drive unit. A control unit is electrically connected to the potentiometer 138. The control unit is configured to acquire the detected parameters of the potentiometer 138 and determine the state of the lid-opening assembly 130 based on the detected parameters. The detected parameters may be voltage signals, AD voltage values, etc. The states of the lid-opening assembly 130 include the aforementioned latched state and disengaged state. When the cover opening assembly 130 is in the engaged state, the fastening member 131 is in the engaged position, and the real-time angle at which the rotating bracket 132 stops is the first target angle. At this time, the detected parameter of the potentiometer 138 is the first AD voltage value. When the cover opening assembly 130 is in the disengaged state, the fastening member 131 is in the disengaged position, and the real-time angle at which the rotating bracket 132 stops is the second target angle. At this time, the detected parameter of the potentiometer 138 is the second AD voltage value. The first target angle is greater than the second target angle.

[0159] In other examples, the position detection device includes an engagement position detection device and a disengagement position detection device. The engagement position detection device generates an engagement position signal when the rotating frame 132 rotates to the point where the engaging member 131 moves to the engagement position. The disengagement position detection device generates a disengagement position signal when the rotating frame 132 rotates to the point where the engaging member 131 moves to the disengagement position. Both the engagement and disengagement position detection devices can be limit switches, position sensors, or microswitches.

[0160] See Figure 6 and Figure 7 Optionally, the drive motor 134 can drive the transmission connector 133 to rotate along the second rotation direction R2 to the first limit position P1, thereby causing the rotating frame 132 to rotate to the position shown in the image. Figure 7 The third extreme position is shown, which causes the fastener 131 to move to the disengaged position. When the rotating frame 132 rotates to the third extreme position, the real-time angular position of the rotating frame 132 is the position of the second target angle. The potentiometer driving part 132c on the rotating frame 132 drives the movable part 138a of the potentiometer 138 to move to the position where the detected parameter of the potentiometer 138 is the second AD voltage value, thereby generating a disengaged position signal and sending it to the control unit. The control unit determines that the fastener 131 is in the disengaged position based on the disengaged position signal. The drive motor 134 can drive the transmission connecting member 133 to rotate along the first rotation direction R1 to the second extreme position P2, thereby causing the rotating frame 132 to rotate to the position shown. Figure 6The fourth extreme position, as shown, causes the fastening member 131 to move to the fastening position. When the rotating frame 132 rotates to the fourth extreme position, the real-time angular position of the rotating frame 132 is the position of the first target angle. The potentiometer driving part 132c on the rotating frame 132 drives the movable part 138a of the potentiometer 138 to move to a position where the detected parameter of the potentiometer 138 is the first AD voltage value, thereby generating a fastening position signal and sending it to the control unit. The control unit determines that the fastening member 131 is in the fastening position based on the fastening position signal.

[0161] See Figure 3 , Figure 6 as well as Figure 7 Optionally, the cooking appliance may also include a manual part or element such as a lever 135. The lever 135 is connected to a first end 133a. The lever 135 extends from the outer surface of the lid body 117 to be operated by the user. The first end 133a is the end of the transmission connector 133 away from the rotating frame 132. By manually applying a torsional force to the transmission connector 133 at the lever 135, the rotating frame 132 can be driven to rotate, thereby moving the fastener 131 to the disengaged position. In the event of a power outage or other factors that prevent the drive motor 134 from operating, the user can adjust the fastener 131 to the disengaged position by moving the lever 135, thus disengaging the inner lid 113 from the pot liner 101. Preferably, the lever 135 can be manufactured as an integral part with the transmission connector 133.

[0162] See Figure 3 , Figure 8 as well as Figure 9 Optionally, the first end 133a has a hole for connecting the motor shaft 134a of the drive motor 134. The motor shaft 134a and the first end 133a can be connected by a plug-in connection or other similar method. Further, the motor shaft 134a includes a locking recess 134b, and correspondingly, the inner wall of the hole in the first end 133a is provided with a locking boss 133a1. Through the cooperation of the locking recess 134b and the locking boss 133a1, the first end 133a can be prevented from disengaging from the motor shaft 134a in an axial direction parallel to the second axis AX2.

[0163] Optionally, the transmission connector 133 extends in a direction intersecting the second axis AX2. In the direction perpendicular to the extension direction of the transmission connector 133 and the second axis AX2, the dimension of the first end 133a is larger than the dimension of the second end 133b, making the outer contour of the transmission connector 133 gourd-shaped. In other words, the first end 133a is wider or thicker than the second end 133b. This ensures the strength of the connection structure between the transmission connector 133 and the motor shaft 134a. At the same time, it saves space occupied by the second end 133b of the transmission connector 133, thereby reducing or avoiding interference between the second end 133b and adjacent structures, and improving the flexibility of movement of the second end 133b.

[0164] See Figure 3 , Figures 5 to 7 Optionally, the float member 136 can be movably mounted on the cover body 117 of the cover 110 or other fixed structure of the cover 112 or the cover body 110. The cover body 117 includes the cover 112. Next, we will describe an example where the float member 136 is movably mounted on the cover 112. The cover 112 has a float mounting hole (not shown). The float member 136 is installed in the float mounting hole. The rotating frame 132 is located between the cover 112 and the top cover 111. The rotating frame 132 has a limiting hole 132b. When the fastener 131 is in the fastened position, the limiting hole 132b and the float mounting hole are aligned. When pressure is applied to the cooking space, the float member 136 moves upward and inserts into the limiting hole 132b under the pressure difference between the cooking space and the external environment. At this time, the float member 136, connected to the float mounting hole and the limiting hole 132b, can prevent the rotating frame 132 from rotating. This prevents the rotating frame 132 from rotating when the cooking space is under pressure. When the cooking space is under normal pressure, the float component 136 disengages from the limiting hole 132b. At this time, the rotating frame 132 can rotate relative to the cover 112.

[0165] See Figure 5 Optionally, the rotating frame 132 may include a frame 132h and a connecting beam 132i spanning the frame 132h. Both ends of the connecting beam 132i are connected to the frame 132h. A limiting hole 132b is provided on the connecting beam 132i or at the intersection of two connecting beams 132i. When the rotating frame 132 is not rotated to a position where the fastening member 131 is in the fastening position, the position of the float member 136 is offset from the position of the limiting hole 132b.

[0166] According to this application, when the rotating frame 132 is not rotated into place along the direction of the snap-on cover, the position of the float component 136 is offset from the limiting hole 132b, thereby preventing the float component 136 from interfering with the rotating frame 132, preventing the rotating frame 132 from being jammed by the float component 136, and ensuring that the rotating frame 132 can be rotated smoothly.

[0167] See also Figure 5 Preferably, the rotating frame 132 includes multiple connecting beams 132i. The multiple connecting beams 132i include a connecting crossbeam 132j, a first connecting longitudinal beam 132k, and a second connecting longitudinal beam 132m. A first axis AX1 is located at the middle of the connecting crossbeam 132j. The first connecting longitudinal beam 132k and the second connecting longitudinal beam 132m are located on opposite sides of the first axis AX1. Both the first connecting longitudinal beam 132k and the second connecting longitudinal beam 132m intersect with the connecting crossbeam 132j. A limiting hole 132b is provided at the intersection of the connecting crossbeam 132j ​​and the first connecting longitudinal beam 132k. This enhances the structural strength of the rotating frame 132 at the limiting hole 132b. The connecting crossbeam 132j ​​can be considered as the main beam inside the frame 132h. Accordingly, the first connecting longitudinal beam 132k and the second connecting longitudinal beam 132m can be considered as reinforcing beams, used to increase the force transmission path between the main beam and the frame 132h, and improve the balance of structural strength of each part of the frame 132h.

[0168] Optionally, the rotating frame 132 may include a junction 132r. The junction 132r is formed at the intersection of the connecting crossbeam 132j ​​and the first connecting longitudinal beam 132k. The junction 132r is configured as a ring structure. A limiting hole 132b forms the inner hole of the junction 132r. Here, the junction 132r can be understood as a ring-shaped reinforcing rib formed with the limiting hole 132b as the center. On the one hand, it surrounds and forms the limiting hole 132b, and on the other hand, it can strengthen the structural strength at the intersection of the connecting crossbeam 132j ​​and the first connecting longitudinal beam 132k.

[0169] In the figure, the rotating frame 132 includes four guide holes 132a, which are spaced apart circumferentially. The two ends of the first connecting longitudinal beam 132k are connected to the frame 132h at two of the guide holes 132a. The two ends of the second connecting longitudinal beam 132m are connected to the frame 132h at the remaining two guide holes 132a. This improves the structural strength of the frame 132h at the guide holes 132a.

[0170] In some embodiments, the rotating frame 132 may not include the first connecting longitudinal beam 132k and the second connecting longitudinal beam 132m. The first axis AX1 passes through the middle of the connecting crossbeam 132j. The connecting crossbeam 132j ​​serves as a support beam connected within the frame 132h, and is used to transmit force between the first axis AX1 and the frame 132h.

[0171] Continue reading Figure 5In addition, the rotating frame 132 also has clearance gaps. These clearance gaps are used to avoid hardware structures on the cover body 110. The hardware structures include circuit boards, steam valves 114, electric pressure relief devices, etc. The clearance gaps are formed between at least two of the connecting crossbeam 132j, the first connecting longitudinal beam 132k, and the second connecting longitudinal beam 132m and the frame 132h. The clearance gaps include a first clearance gap 132g and a second clearance gap 132n. The first clearance gap 132g is used to avoid the steam valve 114. The second clearance gap 132n is used to avoid the downward protrusion of the cover body 111a at the first receiving cavity 111a1. The connecting crossbeam 132j ​​is located above the electric pressure relief device 120. A clearance groove 132p is formed on the lower surface of the connecting crossbeam 132j, which is used to avoid the electric pressure relief device 120. By setting the first clearance gap 132g, the second clearance gap 132n, and the clearance groove 132p, the compactness of the internal structure of the cover 110 can be improved, the space utilization rate can be increased, and the overall thickness of the cover 110 can be reduced.

[0172] See Figure 2 , Figure 3 as well as Figure 5 Furthermore, the rotating frame 132 has a transmission hole 132e. The transmission connector 133 also has a connecting shaft 133c. The connecting shaft 133c is inserted into the transmission hole 132e. The transmission hole 132e provides a clearance that allows the connecting shaft 133c to move radially relative to the rotating frame 132. For example, the transmission hole 132e can be configured as an elongated hole extending radially in a circle centered on the first axis AX1, to allow the connecting shaft 133c to move within the transmission hole 132e, thereby preventing jamming of the rotation of the rotating frame 132 and the rotation of the transmission connector 133. The transmission hole 132e can be a through hole or a blind hole. The transmission hole 132e is located at the edge of the rotating frame 132. While the connecting shaft 133c drives the rotating frame 132 to rotate, it can slide or move within the transmission hole 132e along its length.

[0173] It is understandable that in other examples, the positions of the transmission hole and the connecting shaft can be interchanged; that is, the transmission hole can be set in the transmission connector, and the connecting shaft can be set in the rotating frame.

[0174] Furthermore, the rotating frame 132 also includes a drive boss 132d. The drive boss 132d has an engaged state that engages with the lid latch 160 and a disengaged state that disengages from the lid latch 160. In the engaged state, the drive boss 132d prevents external force from successfully pressing the lid opening button (not shown), thereby preventing the lid 110 from being opened. In the disengaged state, the drive boss 132d allows external force to successfully press the lid opening button, thereby allowing the lid 110 to be opened under the elastic force of the lid opening torsion spring 102. Specifically, when the lid 110 is closed on the pot body 100, when the rotating frame 132 rotates along the second rotation direction R2 (the motor shaft 134a rotates in the first rotation direction R1) to such a state... Figure 6 At the fourth extreme position shown, the fastening member 131 moves to the fastening position, and the transmission boss 132d engages with the lid hook 160. With the lid 110 closed on the pot body 100, when the rotating frame 132 rotates along the first rotation direction R1 (the motor shaft 134a rotates in the second rotation direction R2) to the position shown... Figure 7 At the third extreme position shown, the fastener 131 moves to the disengaged position, and the transmission boss 132d separates from the cover hook 160. It should be noted that the rotating bracket 132 rotates freely. Figure 7 Rotate to the third extreme position as shown Figure 6 The angle of the fourth extreme position shown is less than or equal to the central angle of the circle centered on the first axis AX1 corresponding to the guide hole 132a. The central angle of the circle centered on the first axis AX1 corresponding to the transmission boss 132d can be less than or equal to the central angle corresponding to the guide hole 132a.

[0175] See Figure 10 This application provides a control method for a cooking appliance. The cooking appliance includes a control unit and a lid 110. The control unit is configured to execute the following control method to control the cooking appliance. The lid 110 is provided with a drive motor 134, a rotating frame 132, and a fastening member 131. The rotating frame 132 is connected to the drive motor 134 and can be driven by the drive motor 134 to rotate. The fastening member 131 is connected to the rotating frame 132 and can be driven by the rotating frame 132 to move between a fastened position and a disengaged position. The lid 110 is provided with a potentiometer 138. The rotating frame 132 is provided with a potentiometer drive unit that is linked to the potentiometer 138 and can change the detected parameters of the potentiometer 138.

[0176] Control methods include:

[0177] The drive motor 134 is controlled to rotate in the first rotation direction R1 so that the rotating frame 132 is driven by the drive motor 134 to rotate, thereby driving the fastening member 131 to the fastening position. The potentiometer drive unit is linked to the potentiometer 138 to continuously change the detected parameter of the potentiometer 138 during at least a part of the movement of the fastening member.

[0178] Obtain the detected parameters of potentiometer 138;

[0179] The real-time position of the fastener 131 is determined based on the parameters being detected;

[0180] The system determines whether the fastening component 131 has reached the fastening position based on the real-time position; if so, it controls the drive motor 134 to stop rotating; otherwise, it controls the drive motor 134 to continue rotating.

[0181] According to the control method of this application embodiment, during the rotation of the drive motor 134 in the first rotation direction R1, the real-time position of the fastening member 131 can be determined based on the detected parameters of the potentiometer 138. Based on the real-time position, it can be determined whether the fastening member 131 has reached the fastening position. If it has not reached the fastening position, the drive motor 134 is controlled to continue rotating; if it has reached the fastening position, the drive motor 134 is controlled to stop rotating. This application, by using a potentiometer 138 instead of a microswitch in related technologies, can not only determine whether the fastening member 131 has reached the fastening position, but also helps to determine other real-time positions of the fastening member 131 besides the fastening position, so as to more accurately control the operation of the motor and change the position of the fastening member 131.

[0182] Optionally, the parameter being detected is a voltage signal.

[0183] When the fastening element 131 is in the fastening position, the angle of the rotating frame 132 is the first target angle.

[0184] The methods for determining the position of the fastener 131 based on voltage signals include:

[0185] The real-time angle corresponding to the rotating frame 132 at the real-time position is determined based on the voltage signal and the voltage-angle correspondence table, and it is determined whether the real-time angle has reached the first target angle. If the real-time angle has reached the first target angle, it is determined that the fastening member 131 has reached the fastening position.

[0186] According to this application, the real-time angle can be obtained based on the voltage signal and by looking up a table, and the fastening member 131 is determined to be in the fastening position when the real-time angle reaches the first target angle.

[0187] Optionally, the parameter being detected is a voltage signal. When the fastening element 131 is in the fastening position, the angle of the rotating frame 132 is the first target angle.

[0188] The methods for determining whether the fastening element 131 has reached the fastening position based on the voltage signal include:

[0189] The real-time angle at which the rotating frame 132, located at the real-time position, stops is determined based on the voltage signal and the voltage-angle correspondence table. It is then determined whether the real-time angle is equal to the first target angle. If not, the drive motor 134 is first controlled to rotate along the second rotation direction R2, and then the drive motor 134 is controlled to rotate along the first rotation direction R1.

[0190] According to this application, when the real-time angle has not reached the first target angle, the drive motor 134 can be controlled to rotate along the second rotation direction R2 and then along the first rotation direction R1, so as to determine again whether the fastening part 131 can reach the fastening position and reduce the probability of misjudgment.

[0191] Optionally, when the fastener 131 is in the disengaged position, the angle of the rotating frame 132 is the second target angle. As the drive motor 134 rotates along the first rotation direction R1, the real-time angle of the rotating frame 132 gradually approaches the first target angle. As the drive motor 134 rotates along the second rotation direction R2, the real-time angle of the rotating frame 132 gradually approaches the second target angle, which is smaller than the first target angle.

[0192] According to this application, by controlling the drive motor 134 to rotate along the first rotation direction R1, the real-time angle of the rotating frame 132 is made close to the first target angle, thereby driving the fastening member 131 to move towards the fastening position. By controlling the drive motor 134 to rotate along the second rotation direction R2, the real-time angle of the rotating frame 132 is made close to the second target angle, thereby driving the fastening member 131 to move towards the disengagement position.

[0193] Optionally, methods for determining whether the real-time angle has reached the first target angle include:

[0194] If the real-time angle is less than the first target angle, and the difference between the real-time angle and the first target angle is greater than the allowable deviation angle, then it is determined that the real-time angle has not reached the first target angle. The allowable deviation angle can be, for example, 5°.

[0195] If the difference between the real-time angle and the first target angle is less than or equal to the allowable deviation angle, then the real-time angle is determined to have reached the first target angle.

[0196] According to this application, when the real-time angle is less than the first target angle and the difference between the real-time angle and the first target angle is greater than the allowable deviation angle, it can be determined that the real-time angle has not reached the first target angle, thereby determining that the fastening member 131 has not reached the fastening position. When the difference between the real-time angle and the first target angle is less than or equal to the allowable deviation angle, it can be determined that the real-time angle has reached the first target angle, thereby determining that the fastening member 131 has reached the fastening position.

[0197] Optionally, the method of first controlling the drive motor 134 to rotate along the second rotation direction R2, and then controlling the drive motor 134 to rotate along the first rotation direction R1 includes:

[0198] During the rotation of the drive motor 134 along the second rotation direction R2, the voltage signal of the potentiometer 138 is acquired. Based on the voltage signal, it is determined whether the fastener 131 has reached the disengagement position. If the fastener 131 has reached the disengagement position, the drive motor 134 is controlled to stop rotating along the second rotation direction R2 and start rotating along the first rotation direction R1.

[0199] According to this application, when the drive motor 134 rotates along the second rotation direction R2 until the fastener 131 reaches the disengagement position, it switches to rotating along the first rotation direction R1. This reduces the complexity of the control method and improves the accuracy of the control.

[0200] Optionally, the parameter being detected is a voltage signal.

[0201] When the fastener 131 is in the disengaged position, the angle of the rotating frame 132 is the second target angle.

[0202] After receiving the cooking completion signal, the drive motor 134 is controlled to rotate along the second rotation direction R2, so that the rotating frame 132 drives the fastening member 131 to move to the disengaged position.

[0203] The real-time voltage signal of potentiometer 138 is obtained. Based on the voltage signal and the voltage-angle correspondence table, the real-time angle at which the rotating frame 132 is located at the real-time position is determined. It is then determined whether the real-time angle is equal to the second target angle. If so, the drive motor 134 is controlled to stop rotating.

[0204] According to this application, after cooking is completed, the drive motor 134 is controlled to rotate in the second rotation direction R2. When the real-time angle at which the rotating frame 132 stops is determined to be equal to the second target angle according to the voltage signal of the potentiometer 138 and the voltage-angle correspondence table, it can be determined that the fastener 131 has reached the disengagement position. Thus, the drive motor 134 is controlled to stop, thereby reliably and accurately controlling the fastener 131 to move to the disengagement position.

[0205] Optionally, the method for determining whether the fastener 131 has reached the disengaged position based on the voltage signal includes:

[0206] Based on the voltage signal and the voltage-angle correspondence table, the real-time angle at which the rotating frame 132 is located in the real-time position is determined, and it is determined whether the real-time angle has reached the second target angle. If so, it is determined that the fastener 131 has reached the disengagement position.

[0207] According to this application, the real-time angle can be obtained based on the voltage signal and by looking up a table, and the fastener 131 is determined to have reached the disengagement position when the real-time angle reaches the second target angle.

[0208] Optionally, during the process of the drive motor 134 rotating along the first rotation direction R1, the real-time angle of the rotating frame 132 gradually approaches the first target angle. During the process of the drive motor 134 rotating along the second rotation direction R2, the real-time angle of the rotating frame 132 gradually approaches the second target angle, and the second target angle is smaller than the first target angle.

[0209] According to this application, by controlling the drive motor 134 to rotate along the first rotation direction R1, the real-time angle of the rotating frame 132 is made close to the first target angle, thereby driving the fastening member 131 to move towards the fastening position. By controlling the drive motor 134 to rotate along the second rotation direction R2, the real-time angle of the rotating frame 132 is made close to the second target angle, thereby driving the fastening member 131 to move towards the disengagement position.

[0210] Optionally, methods for determining whether the real-time angle has reached the second target angle include:

[0211] If the real-time angle is greater than the second target angle, and the difference between the real-time angle and the second target angle is greater than the allowable deviation angle, then it is determined that the real-time angle has not reached the second target angle.

[0212] If the difference between the real-time angle and the second target angle is less than or equal to the allowable deviation angle, then the real-time angle is determined to have reached the second target angle.

[0213] According to this application, if the real-time angle is greater than the second target angle and the difference between the real-time angle and the second target angle is greater than the allowable deviation angle, it can be determined that the real-time angle has not reached the second target angle, thereby determining that the fastener 131 has not reached the disengagement position. If the difference between the real-time angle and the second target angle is less than or equal to the allowable deviation angle, it can be determined that the real-time angle has reached the second target angle, thereby determining that the fastener 131 has reached the disengagement position.

[0214] Optionally, one end of the lid 110 is rotatably connected to the pot body 100, and the other end is detachably connected to the pot body 100 via a lid latch 160. The rotating frame 132 includes a drive boss 132d. When the control unit receives a latching position signal, the drive boss 132d engages with the lid latch 160 to prevent the lid 110 from being opened. When the control unit receives a disengaged position signal, the drive boss 132d disengages from the lid latch 160 to allow the lid 110 to be opened.

[0215] According to this application, the engagement of the transmission boss 132d with the lid latch 160 prevents external force from opening the lid 110. After cooking is complete, the transmission boss 132d separates from the lid latch 160 as the rotating frame 132 rotates, thus allowing the lid 110 to be opened. This improves the safety of the cooking appliance in pressure cooking mode.

[0216] Embodiments of this application also provide a computer-readable storage medium. The computer-readable storage medium stores a computer program. When executed, the computer program implements the control method described above.

[0217] The computer-readable storage medium according to embodiments of this application can store a computer program so that, when executed, it can implement the control method described above. By applying the control method described above, it is possible to determine whether the fastening member 131 has reached the fastening position, and it also helps to obtain other real-time positions of the fastening member 131 besides the fastening position, so as to accurately control the operation of the motor.

[0218] The cooking appliance to which the control method of the cooking appliance according to the embodiments of this application is applicable is a cooking appliance in which a stepper motor is added to the lid 110 as a drive motor 134, and the motor shaft 134a of the drive motor 134 is connected to the fastening member 131 linkage mechanism through a transmission connector 133. The fastening member 131 linkage mechanism includes a rotating frame 132 and a fastening member 131. The fastening member 131 automatically locks / unlocks the lid by rotating the drive motor 134 in reverse / forward. When the electric pressure relief device 120 is energized, the steam passage 110a is blocked to allow pressure to build up. When the power is off, the electric pressure relief device 120 resets to the state where the steam passage 110a is open.

[0219] This application installs a potentiometer 138 on the cover 110. The resistance value of the potentiometer 138 reflects the real-time rotation angle of the rotating frame 132, and the fastening member 131 is then determined based on this rotation angle. At the same time, the position of the fastening member 131 can also be obtained in real time, which helps to quickly determine whether the cover locking and opening assembly 130 is stuck or whether the drive motor 134 is stalled.

[0220] When the rotating frame 132 rotates, the potentiometer driving unit 132c drives the movable part 138a of the potentiometer 138 to move. The movement of the movable part 138a changes the resistance of the potentiometer 138, which in turn changes the voltage division of the potentiometer 138, resulting in a change in the AD voltage value. Therefore, the AD voltage value, resistance, and voltage of the potentiometer 138 each have a certain correspondence with the real-time angular position of the rotating frame 132. Based on the pre-measured correspondence between the voltage value and the real-time angular position of the rotating frame 132, the aforementioned voltage-angle correspondence table is formed and stored in the control unit for retrieval, enabling the control unit to determine the real-time angular position of the rotating frame 132. The control unit determines the real-time angular position of the rotating frame 132 by detecting the potential signal, voltage signal, or AD voltage value of the potentiometer 138 and by querying the stored voltage-angle correspondence table. The different angular positions to which the rotating frame 132 rotates ultimately result in different potential signals, voltage signals, or AD voltage values, etc., detected by the control unit. On one hand, the control unit can determine whether the fastening member 131 has reached the fastening position based on whether the real-time angle has reached the preset first target angle, and determine whether the fastening member 131 has reached the disengagement position based on whether the real-time angle has reached the preset second target angle. On the other hand, the control unit can determine the real-time angular position of the rotating frame 132 based on any detected parameter of the potentiometer 138.

[0221] For example, the correspondence between potentiometer resistance, rotation angle, and voltage value is shown in the table below:

[0222]

[0223]

[0224]

[0225] As shown in the table above, the potentiometer resistance-rotation angle-voltage value correspondence table includes the voltage value-rotation angle correspondence table. The voltage value-rotation angle correspondence table can also be simply referred to as the voltage-angle correspondence table.

[0226] For example, the total resistance of potentiometer 138 is 100Ω, and the maximum rotation angle of the rotating frame 132 is 100°. When the rotating frame 132 rotates 10°, the resistance of potentiometer 138 is 10Ω, and the voltage signal corresponding to 10Ω is V0. According to the calculation formula 100 / 10=5 / V0, we can get V0=0.5V. Here, 100 is the total resistance of potentiometer 138, 10 is the current resistance, and 5 is the power supply reference voltage of the control unit. That is, during the rotation of the drive motor 134 along the first rotation direction R1, for every 1° rotation of the rotating frame 132, the resistance increases by 1Ω, and the voltage increases by 0.05V. During the rotation of the drive motor 134 along the first rotation direction R1, for every 1 degree rotation of the rotating frame 132, the resistance decreases by 1Ω, and the voltage decreases by 0.05V.

[0227] The following describes in detail the control method of one embodiment of this application, taking the rice cooking function as an example.

[0228] 1. Cooking Preparation Stage

[0229] Select the rice cooking function and press the start button. This sends a signal to the drive motor 134 to rotate in the first rotation direction R1, controlling the drive motor 134 to rotate the rotating frame 132 by a certain angle, such as 90° to 110°. Preferably, the drive motor 134 rotates the rotating frame 132 by 100°. Obtain the voltage signal from the potentiometer 138 and calculate the real-time angle corresponding to the rotating frame 132. When the real-time angle reaches the first target angle, it indicates that the lid is locked, and then the preheating and water absorption stage begins.

[0230] Specifically, after pressing the start button, the voltage signal of potentiometer 138 when the rotating frame 132 is in its current position is obtained, and it is determined whether the fastening member 131 is in the fastening position. If the current angle d is within the range of 95° to 100° according to the voltage signal and a lookup table, it is determined that the fastening member 131 is in the fastening position, and the locking process is not required. If the current angle d is less than 95°, the drive motor 134 is first controlled to rotate along the second rotation direction R2 to rotate the rotating frame by an angle d, and then the drive motor 134 is controlled to rotate along the first rotation direction R1. According to the potential signal of potentiometer 138, the corresponding rotation angle is calculated. If the rotation angle reaches the first target angle d1, the control unit controls the drive motor 134 to stop working and starts counting forward from 0. The limiting hole 132b on the rotating frame 132 is aligned with the float member 136 on the cover 110. d1 is between 99° and 101°. The control unit obtains the initial bottom temperature T10 of the pot through the bottom temperature detection device and the initial top temperature T20 of the pot through the top temperature detection device. The real-time angle of the rotating frame 132 during rotation has a range, for example, 0° to 100°. Preferably, the first target angle is 100° and the second target angle is 0°.

[0231] 2. Cooking stage

[0232] (1) Preheating and water absorption stage

[0233] The heating device operates at a first power for heating. When the temperature detected by the bottom temperature sensor reaches the preset water absorption temperature T11, the heating device stops heating. T11 ≤ 60℃, for example, T11 equals 55℃. When the temperature detected by the bottom temperature sensor is less than (T11-3), the heating device is controlled to heat at a second power. Here, (T11-3) is 3℃ lower than T11. A similar description can be understood here. When the temperature detected by the bottom temperature sensor reaches the preset water absorption temperature T11, the heating device stops heating. This cycle repeats, dynamically maintaining the temperature at the bottom of the cooking space within a range greater than or equal to (T11-3) and less than T11. The preset water absorption time for the preheating water absorption stage is t1. t1 ≤ 20min, for example, t1 equals 8min. When the duration of the water absorption stage reaches t1, the rapid boiling and pressurization stage begins. The first power is the rated power of the heating device or a power greater than 80% of the rated power. The second power is a power greater than or equal to 30% of the rated power of the heating device, and less than or equal to 80% of the rated power of the heating device.

[0234] (2). Rapid boiling and pressurization stage

[0235] During the rapid boiling and pressurization phase, the heating device operates at its highest power for heating. When the temperature detected by the top temperature sensor reaches the preset boiling point temperature T21, boiling is determined. T21 ≥ 85℃. For example, if the temperature detected by the top temperature sensor does not rise further for 30 seconds, boiling or a state of boiling is determined. At this time, the boiling flag b changes from 0 to 1, and the actual boiling temperature T22 is recorded. T22 ≥ T21, meaning the actual boiling temperature may be the same as or higher than the preset boiling point temperature.

[0236] If the rotation angle of the drive motor 134 is between 95° and 105°, it indicates that the lid is in place. The electric pressure relief device then switches to the closed state, blocking the steam passage, and the cooking space begins to pressurize. Timing of the pressurization time begins. Within the preset pressurization time t2, the maximum temperature T23 detected by the top temperature detection device is recorded in real time. T23 ≤ (T22 + 10) (up to 50 kPa under standard atmospheric pressure). When the pressurization time reaches the preset pressurization time t2, or the maximum temperature detected by the top temperature detection device is greater than (T22 + 10), the next stage (pressure holding and boiling maintenance stage) begins. The preset pressurization time t2 ≤ 10 min, preferably 8 min. During the pressurization stage, the float component floats upward under the pressure within the cooking space and inserts into the limiting hole. At this time, the rotating frame is blocked by the float component, thus preventing the rotating frame from rotating relative to other parts of the lid.

[0237] If the rotation angle of the drive motor 134 is less than 95°, the drive motor 134 is first controlled to rotate along the second rotation direction R2 by a certain angle, such as 50°, and then controlled to rotate along the first rotation direction R1 by an angle, such as 100°. If the control unit determines from the voltage signal of the potentiometer 138 that the real-time angle of the rotating frame 132 is still less than 95 degrees, then the pressure is not applied or the relevant pressure-applying cooking process is not executed, and the electric pressure relief device is not activated. The heating device is then controlled to heat at the second power, reducing the heat and running the normal rice cooker program. The second power is greater than or equal to 30% of the rated power of the heating device and less than or equal to 80% of the rated power of the heating device. At this time, the float component is not aligned with the limiting hole.

[0238] (3) Pressure holding and boiling stage

[0239] Standard cooking procedures:

[0240] Record the duration of boiling. When the boiling duration reaches the preset boiling duration t3, proceed to the next stage (simmering stage). t3 ≤ 15 min. Preferably, t3 is 10 min. During the preset boiling duration t3, the control unit controls the heating device to operate at a second power for heating.

[0241] Pressure cooking process:

[0242] When the pressure-up time reaches the preset pressure-up time t2, or when the maximum temperature detected by the top temperature detection device is greater than (T22+10), the recording of the boiling maintenance time begins. When the boiling maintenance time reaches the preset boiling maintenance time t3, the next stage (cooking stage) begins. t3 ≤ 10 min. Preferably, t3 is 5 min. During the preset boiling maintenance time t3, the control unit controls the heating device to operate at a second power for heating.

[0243] (4) Cooking Rice Stage

[0244] Standard rice cooker program:

[0245] The heating device is controlled to operate at a third power for heating, while simultaneously counting down from a preset cooking time t4. t4 ≤ 20 min, preferably t4 is 10 min. In an example with a display component, the control unit controls the display component to show the countdown from the preset cooking time t4. When the countdown reaches 0, the cooking stage ends, and the heat preservation stage begins.

[0246] Pressure cooker program:

[0247] The heating device is controlled to operate at a third power for heating, while a countdown begins from the preset cooking time t4. t4 ≤ 20 min, preferably t4 is 10 min. In an example with a display component, the control unit controls the display component to show the countdown from the preset cooking time t4. When the countdown reaches 5 min, the control unit begins to control venting. Venting is divided into two stages: in the first stage, venting occurs once at each preset interval, for a total of at least two venting operations; in the second stage, venting is continuously performed. Before venting by keeping the steam channel 110a open, the real-time cooking temperature T24 detected by the top temperature detection device is obtained, and it is determined whether T24 is less than or equal to (T22 + a). 2° ≤ a ≤ 10°. 1° corresponds to 5 kPa. If T24 ≤ (T22 + a), the electric pressure relief device 120 is switched to the open state. If T24 ≤ (T22 + a), the electric pressure relief device 120 is switched to the open state, i.e., entering the second stage of venting. If T24 is greater than (T22+a), the electric pressure relief device 120 is switched between open and closed states to perform intermittent venting in the first stage. During the first stage of venting, the control unit automatically adjusts the venting frequency or operating frequency of the electric pressure relief device 120 according to the real-time cooking temperature T24 before venting. If the real-time cooking temperature T24 corresponds to a temperature of 40 kPa to 50 kPa, the control unit controls the electric pressure relief device 120 to switch to the open state every 8 seconds and maintain the venting for 1 second. If the real-time cooking temperature T24 corresponds to a temperature of 30 kPa to 40 kPa, the control unit controls the electric pressure relief device 120 to switch to the open state every 10 seconds and maintain the venting for 1 second. If the real-time cooking temperature T24 corresponds to a temperature of 20 kPa to 30 kPa, the control unit controls the electric pressure relief device 120 to switch to the open state every 12 seconds and maintain the venting for 1 second. If the real-time cooking temperature T24 corresponds to a temperature less than or equal to 20 kPa, it is considered a safe pressure, and the system enters the second stage of venting. The control unit controls the electric pressure relief device 120 to switch and remain in the open position. In some examples, when the countdown reaches 5 minutes, venting occurs once each at 8 seconds (4 minutes 52 seconds), 16 seconds (4 minutes 44 seconds), and 24 seconds (4 minutes 36 seconds), for a total of 3 venting cycles. Immediately afterward, the electric pressure relief device switches to the closed position and remains in the closed position for 1 second (until 4 minutes 35 seconds) or 0.5 seconds or other durations. After another 30 seconds (e.g., 4 minutes 5 seconds), the electric pressure relief device switches to the open position to keep the steam passage open for continuous venting. After continuous venting begins, the buzzer sounds 30 times, each beep lasting approximately 0.5 seconds, with an interval of approximately 0.5 seconds between each beep.When the countdown reaches 1 minute and the pressure in the cooking space has reached atmospheric pressure, if the real-time cooking temperature T24 detected by the top temperature detection device is less than T22, the drive motor 134 is controlled to rotate in the second rotation direction R2 to disengage. When the pressure in the cooking space has reached atmospheric pressure, the float component 136 falls back to the initial position of the disengagement limit hole 132b to allow the rotating frame 132 to rotate. The real-time angle of the rotating frame 132 is determined according to the voltage signal of the potentiometer 138, and it is judged whether the real-time angle has reached the second target angle d2. If so, it indicates that the fastener has reached the disengagement position, and the drive motor is controlled to stop rotating. d2≤1°. The third power is less than 30% of the rated power of the heating device. When the countdown reaches 0, the cooking stage ends and the heat preservation stage begins.

[0248] (5) Insulation stage

[0249] The heating device is controlled to operate at a third power level for heating. The temperature within the cooking space is maintained, for example, at 70°C. The heat preservation time is, for example, 0 hours to 24 hours, until the user turns off the heat preservation function, selects the stop function, or turns off the power. The third power level is less than 30% of the rated power of the heating device.

[0250] Unless otherwise defined, the technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art. The terminology used herein is for descriptive purposes only and is not intended to limit the scope of this application. Terms such as “setup” appearing herein can refer to either a component being directly attached to another component or a component being attached to another component via an intermediary. A feature described in one embodiment herein may be applied, alone or in combination with other features, to another embodiment, unless that feature is not applicable in that other embodiment or is otherwise stated.

[0251] This application has been described through the above embodiments; however, it should be understood that the above embodiments are for illustrative purposes only and are not intended to limit this application to the described embodiments. Those skilled in the art will understand that many more variations and modifications can be made based on the teachings of this application, and all such variations and modifications fall within the scope of protection claimed in this application.

Claims

1. A control method for cooking appliances, characterized in that, The cooking appliance includes a lid (110); The cover (110) is provided with a drive motor (134), a rotating frame (132) and a fastening member (131). The rotating frame (132) is connected to the drive motor (134) and can be driven by the drive motor (134) to rotate. The fastening member (131) is connected to the rotating frame (132) and can be driven by the rotating frame (132) to move between a fastened position and a disengaged position. The cover (110) is provided with a potentiometer (138), and the rotating frame (132) is provided with a potentiometer driving part (132c) that is linked to the potentiometer (138) and can change the detected parameters of the potentiometer (138). The control method includes: The drive motor (134) is controlled to rotate in a first rotation direction (R1) so that: the rotating frame (132) is driven to rotate by the drive motor (134), thereby driving the fastening member (131) toward the fastening position; the potentiometer drive unit (132c) is linked to the potentiometer (138) to continuously change the detected parameter of the potentiometer (138) during at least a part of the movement of the fastening member (131); Obtain the detected parameters of the potentiometer (138); The real-time position of the fastener (131) is determined based on the detected parameters; Determine whether the fastening component (131) has reached the fastening position based on the real-time position; If yes, control the drive motor (134) to stop rotating; otherwise, control the drive motor (134) to continue rotating.

2. The control method according to claim 1, characterized in that, The parameter being detected is a voltage signal; When the fastening member (131) is in the fastening position, the angle of the rotating frame (132) is the first target angle; The method for determining the position of the fastener (131) based on the voltage signal includes: The real-time angle corresponding to the rotating frame (132) at the real-time position is determined according to the voltage signal and the voltage-angle correspondence table, and it is determined whether the real-time angle has reached the first target angle. If the real-time angle has reached the first target angle, it is determined that the fastening member (131) has reached the fastening position.

3. The control method according to claim 1, characterized in that, The parameter being detected is a voltage signal; When the fastening member (131) is in the fastening position, the angle of the rotating frame (132) is the first target angle; The method for determining whether the fastening element (131) has reached the fastening position based on the voltage signal includes: The real-time angle at which the rotating frame (132) at the real-time position is located is determined according to the voltage signal and the voltage-angle correspondence table. It is then determined whether the real-time angle is equal to the first target angle. If not, the drive motor (134) is first controlled to rotate along the second rotation direction (R2), and then the drive motor (134) is controlled to rotate along the first rotation direction (R1).

4. The control method according to claim 2 or 3, characterized in that, When the fastener (131) is in the disengaged position, the angle of the rotating frame (132) is the second target angle; During the rotation of the drive motor (134) along the first rotation direction (R1), the real-time angle of the rotating frame (132) gradually approaches the first target angle. During the rotation of the drive motor (134) along the second rotation direction (R2), the real-time angle of the rotating frame (132) gradually approaches the second target angle, and the second target angle is smaller than the first target angle.

5. The control method according to claim 4, characterized in that, The method for determining whether the real-time angle has reached the first target angle includes: If the real-time angle is less than the first target angle, and the difference between the real-time angle and the first target angle is greater than the allowable deviation angle, then it is determined that the real-time angle has not reached the first target angle. If the difference between the real-time angle and the first target angle is less than or equal to the allowable deviation angle, then it is determined that the real-time angle has reached the first target angle.

6. The control method according to claim 3, characterized in that, The method of first controlling the drive motor (134) to rotate along the second rotation direction (R2) and then controlling the drive motor (134) to rotate along the first rotation direction (R1) includes: During the process of the drive motor (134) rotating along the second rotation direction (R2), the voltage signal of the potentiometer (138) is acquired, and the fastener (131) is determined according to the voltage signal to determine whether it has reached the disengagement position. If the fastener (131) has reached the disengagement position, the drive motor (134) is controlled to stop rotating along the second rotation direction (R2) and start rotating along the first rotation direction (R1).

7. The control method according to claim 1, characterized in that, The parameter being detected is a voltage signal; When the fastener (131) is in the disengaged position, the angle of the rotating frame (132) is the second target angle. After receiving the cooking completion signal, the drive motor (134) is controlled to rotate along the second rotation direction (R2), so that the rotating frame drives the fastening member (131) to move towards the disengaged position. The real-time voltage signal of the potentiometer (138) is obtained, and the real-time angle at which the rotating frame (132) at the real-time position is stopped is determined according to the voltage signal and the voltage-angle correspondence table. It is then determined whether the real-time angle is equal to the second target angle. If so, the drive motor (134) is controlled to stop rotating.

8. The control method according to claim 7, characterized in that, The method for determining whether the fastener (131) has reached the disengagement position based on the voltage signal includes: Based on the voltage signal and the voltage-angle correspondence table, determine the real-time angle at which the rotating frame (132) located at the real-time position stays, and determine whether the real-time angle has reached the second target angle. If so, determine that the fastening member (131) has reached the disengagement position.

9. The control method according to claim 7, characterized in that, During the rotation of the drive motor (134) along the first rotation direction (R1), the real-time angle of the rotating frame (132) gradually approaches the first target angle. During the rotation of the drive motor (134) along the second rotation direction (R2), the real-time angle of the rotating frame (132) gradually approaches the second target angle, and the second target angle is smaller than the first target angle.

10. The control method according to claim 7, characterized in that, The method for determining whether the real-time angle has reached the second target angle includes: If the real-time angle is greater than the second target angle, and the difference between the real-time angle and the second target angle is greater than the allowable deviation angle, then it is determined that the real-time angle has not reached the second target angle. If the difference between the real-time angle and the second target angle is less than or equal to the allowable deviation angle, then it is determined that the real-time angle has reached the second target angle.

11. A computer-readable storage medium, characterized in that, The computer-readable storage medium stores a computer program that, when executed, implements the control method according to any one of claims 1 to 10.

12. A cooking utensil, characterized in that, The cooking appliance includes: The pot body (100) includes a pot inner (101) for containing food ingredients; A lid (110) is provided on the pot body (100) in an openable and closable manner; A locking and opening assembly (130) is movably disposed on the lid (110). The locking and opening assembly (130) has a latching state that locks the inner pot (101) and the lid (110) and a disengaging state that releases the inner pot and the lid (110). A drive motor (134) is driven to the cover opening assembly (130); A potentiometer (138) disposed on the cover (110), the potentiometer (138) having a movable part (138a) connected to the cover locking / unlocking assembly (130); and The control unit is electrically connected to the drive motor (134) and the potentiometer (138). The control unit is configured to control the drive motor (134) to drive the cover opening assembly (130) to switch between the latched state and the disengaged state, and at the same time acquire the detected parameters of the potentiometer (138) and determine the state of the cover opening assembly (130) based on the detected parameters.

13. The cooking utensil according to claim 12, characterized in that, The cover opening and closing assembly (130) includes a rotating frame (132) and a fastening member (131). The rotating frame (132) is connected to the drive motor (134) and can be driven by the drive motor (134) to rotate. The fastening member (131) is connected to the rotating frame (132) and can be driven by the rotating frame (132) to move between a fastened position and a disengaged position. When the fastening member (131) is in the fastening position, the cover opening assembly (130) is in the fastening state; When the fastening member (131) is in the disengaged position, the cover opening assembly (130) is in the disengaged state; The rotating frame (132) is provided with a potentiometer drive unit (132c) that is linked to the movable part (138a) of the potentiometer (138) and can change the detected parameters of the potentiometer (138).

14. The cooking utensil according to claim 13, characterized in that, The parameter being detected is the AD voltage value; When the fastening member (131) is in the fastening position, the rotating frame (132) is in the position of the first target angle, and the detected parameter of the potentiometer (138) is the first AD voltage value; When the fastener (131) is in the disengaged position, the rotating frame (132) is in the position of the second target angle, and the detected parameter of the potentiometer (138) is the second AD voltage value; The second target angle is smaller than the first target angle.

15. The cooking utensil according to claim 13, characterized in that, The rotating frame (132) is rotatably connected to the cover (110) about a first axis (AX1). The rotating frame (132) includes a guide hole (132a), the extension direction of which intersects the radial direction of the cover (110). The fastening member (131) is slidably connected to the guide hole (132a) along the extension direction. The rotating frame (132) is connected to the drive motor (134) to drive the fastening member (131) to move under the drive of the drive motor (134). The potentiometer driving part (132c) of the rotating frame (132) is connected to the movable part (138a).

16. The cooking utensil according to claim 13, characterized in that, The cover (110) includes a cover body (117), which is provided with a float component (136); the rotating frame (132) is connected to the cover body (117), and the rotating frame (132) is provided with a limiting hole (132b) for engaging with the float component (136); when the cover locking and opening assembly (130) is in the locked state, the position of the float component (136) is aligned with the position of the limiting hole (132b), or the float component (136) is located in the limiting hole (132b).

17. The cooking utensil according to claim 16, characterized in that, The rotating frame (132) includes a frame (132h) and a connecting beam (132i) spanning the frame (132h). The limiting hole (132b) is located at the intersection of the connecting beam (132i) or two connecting beams (132i). When the cover opening assembly (130) is not in the latching state, the position of the float component (136) is offset from the position of the limiting hole (132b).

18. The cooking utensil according to claim 13, characterized in that, The rotating frame (132) is rotatably connected to the cover (110) about the first axis (AX1); The drive motor (134) is located on the circumferential outer side of the rotating frame (132); the cooking appliance also includes a transmission connector (133), one end of which is rotatably connected to the cover (110) around a second axis (AX2) and is transmitted to the drive motor (134), and the other end is movably connected to the rotating frame (132), the second axis (AX2) being parallel to the first axis (AX1).

19. The cooking utensil according to claim 18, characterized in that, The rotating frame (132) includes a frame (132h) with a transmission hole (132e) extending radially in a circle centered on the first axis (AX1). The transmission connector (133) has a connecting shaft (133c) at the end away from the motor, which is movably connected to the transmission hole (132e).

20. The cooking utensil according to claim 18, characterized in that, The transmission connector (133) extends in a direction intersecting the second axis (AX2). The transmission connector (133) has a first end (133a) and a second end (133b). The first end (133a) is connected to the motor shaft (134a) of the drive motor (134), and the second end (133b) is movably connected to the rotating frame (132). In a direction perpendicular to the extension direction of the transmission connector (133) and the second axis (AX2), the size of the first end (133a) is larger than the size of the second end (133b).

21. The cooking utensil according to claim 15, characterized in that, The rotating frame (132) includes a limiting hole (132b); the cooking appliance includes a float component (136) which is movably mounted on the cover (110) between a normal pressure position and an overpressure position. When the float component (136) is in the overpressure position, it is inserted into the limiting hole (132b) to prevent the rotating frame (132) from rotating, and when the float component (136) is in the overpressure position, it is disengaged from the limiting hole (132b) to allow the rotating frame (132) to rotate.

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