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

Abstract

This application provides a control method, a computer-readable storage medium, and a pressure cooking appliance. The control method includes the steps of: controlling a drive motor to rotate along a first rotation direction for a preset engagement time, the preset engagement time being a preset time value or derived from a preset engagement angle of the rotating frame; the control unit determining whether it has received an engagement position signal from an engagement position detection device; if no engagement position signal is received, controlling an electric pressure relief device to remain in the open state of the open steam passage and executing the selected cooking function in atmospheric pressure mode, or activating a prompt element, or stopping cooking; if an engagement position signal is received, controlling the electric pressure relief device to switch to the closed state of the blocked steam passage and executing the selected cooking function in pressure mode. This application controls the opening and closing state of the electric pressure relief device based on whether an engagement position signal is received within the preset engagement time, thereby achieving more accurate and safer control of the pressure cooking appliance.

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 pressure cooking appliance. Background Technology

[0002] Pressure cooking appliances in related technologies use movable fasteners to engage and disengage the lid and inner pot. However, when the fastener is not in the engaged position, the user cannot determine whether it is properly engaged. In this situation, the pressure cooking appliance cannot be used normally, posing a safety risk.

[0003] Therefore, there is a need to provide a control method, a computer-readable storage medium, and a pressure cooking appliance to at least partially solve the above problems. Summary of the Invention

[0004] 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.

[0005] To at least partially solve the above problems, the first aspect of this application provides a control method.

[0006] For use in a pressure cooking appliance, the pressure cooking appliance comprising:

[0007] Control unit;

[0008] The cover is provided with a steam passage and an electric pressure relief device corresponding to the steam passage, and the electric pressure relief device is electrically connected to the control unit.

[0009] A rotating frame, which is mounted on the cover, and is equipped with fastening components;

[0010] A drive motor, disposed on the cover, connected to the rotating frame, for driving the rotating frame to rotate; and

[0011] A position detection device is disposed on the cover and used to detect the position of the fastening member. The position detection device includes a fastening position detection device and is electrically connected to the control unit.

[0012] The control method includes the following steps:

[0013] Step a: Control the drive motor to rotate along the first rotation direction for a preset engagement time, wherein the preset engagement time is a preset time value or is derived from the preset engagement angle of the rotating frame;

[0014] Step b: The control unit determines whether it has received a fastening position signal from the fastening position detection device.

[0015] If the engagement position signal is not received, the electric pressure relief device is controlled to remain in the open state of the open steam passage and the selected cooking function is executed in atmospheric pressure mode, or the prompt element is activated, or cooking is stopped.

[0016] If the engagement position signal is received, the electric pressure relief device is controlled to switch to the closed state of blocking the steam passage and the selected cooking function is executed in pressure mode.

[0017] According to the control method of the first aspect of this application, whether the appliance is properly engaged is determined based on whether an engagement position signal is received during the preset engagement time of the drive motor rotation. When it is determined that the appliance is properly engaged, the electric pressure relief device is controlled to switch to the closed state; when it is determined that the appliance is not properly engaged, the electric pressure relief device is controlled to switch to the open state. This enables more accurate and safer control of the pressure cooking appliance.

[0018] Optionally, the control method includes: if the engagement position signal is not received, detecting the abnormality flag signal of the drive motor and determining whether the drive motor is faulty; or

[0019] Before performing the cooking process that requires pressure, the drive motor is first controlled to rotate along the second rotation direction by a preset rotation angle, and then steps a to b are executed sequentially. The preset rotation angle is smaller than the preset engagement angle.

[0020] According to this application, in the absence of a locking position signal, the fault of the drive motor can be determined by detecting the abnormal indicator signal of the drive motor, or by first controlling the drive motor to rotate and then performing the locking operation to determine whether the locking is in place.

[0021] Optionally, the drive motor includes a motor shaft.

[0022] The control method includes:

[0023] In step a, the preset rotational speed of the motor shaft and the ratio between the preset rotational speed of the motor shaft and the rotational speed of the rotating frame are first obtained. Then, the preset engagement time is determined based on the preset engagement angle, the preset rotational speed of the motor shaft, and the ratio.

[0024] According to this application, the preset engagement time can be determined by preset engagement angle, preset rotation speed of motor shaft, and the ratio of preset rotation speed of motor shaft to rotation speed of rotating frame.

[0025] Optionally, the control method includes:

[0026] When performing step a, if the engagement position signal is not received within the preset engagement time, it is determined whether an abnormal flag signal from the drive motor has been received within the preset engagement time.

[0027] If the abnormal flag signal is not received within the preset engagement time, the electric pressure relief device is controlled to switch to the closed state of blocking the steam passage and the selected cooking function is executed in pressure mode.

[0028] If the abnormality signal is received within the preset engagement time, the electric pressure relief device is controlled to remain in the open state of the open steam passage and execute the selected cooking function in atmospheric pressure mode, or activate the prompt element, or stop cooking.

[0029] According to this application, in cases where a locking position signal cannot be generated due to factors such as a malfunction of the position detection device, the ability of the drive motor to drive the rotating frame to the correct position is determined by whether an abnormality flag signal is received within a preset locking time. If no abnormality flag signal is received within the preset locking time, it indicates that the drive motor is rotating normally within the preset locking time, thus enabling it to drive the rotating frame to the correct position. If an abnormality flag signal is received within the preset locking time, it indicates that the drive motor's normal rotation time is insufficient to reach the preset locking time, thus preventing it from driving the rotating frame to the correct position.

[0030] Optionally, the control method includes:

[0031] The system obtains the cooking function selected by the user and determines whether the cooking process includes a pressure cooking step based on the selected cooking function.

[0032] If a pressure cooking process is included, then if the engagement position signal is not received, the cooking process is stopped or the selected cooking function is executed in normal pressure cooking mode. If the engagement position signal is received, the cooking process corresponding to the cooking function is continued.

[0033] According to this application, when the selected cooking function includes a pressure cooking process, the subsequent cooking process can be automatically controlled based on whether a locking position signal is received, reducing human intervention and helping to improve the user experience.

[0034] Optionally, the cover is provided with a manual part or manual element that is connected to the rotating frame and can drive the rotating frame to rotate.

[0035] The control method includes:

[0036] In step b, the prompting element outputs a fastening alarm message to prompt the user to manually fasten the device.

[0037] According to this application, a fastening alarm message can be output even when the fastening position signal is not received, so as to remind the user to perform the fastening operation manually.

[0038] Optionally, the cover is provided with a manual part or manual element connected to the rotating frame and capable of driving the rotating frame to rotate, and the position detection device includes a disengagement position detection device.

[0039] The control method includes:

[0040] After cooking is complete, the drive motor is controlled to rotate in the second rotation direction, and it is determined whether a disengagement position signal has been received from the disengagement position detection device.

[0041] If the detachment position signal is not received, a detachment alarm message will be output to prompt the user to detach manually.

[0042] According to this application, during the rotation of the drive motor in the second rotation direction, a disengagement alarm message can be output if the engagement position signal is not received, so as to remind the user to perform a disengagement operation manually.

[0043] Optionally, the cover body includes a cover body, and the cover body is provided with a float component;

[0044] The rotating frame is provided with a limiting hole for engaging with the float component;

[0045] When the control unit receives the engagement position signal, the position of the float component is aligned with the position of the limiting hole;

[0046] During the process of the electric pressure relief device switching to the off state and the pressure cooking appliance performing the selected cooking function in pressure mode, the float component moves into the limiting hole.

[0047] According to this application, a limiting hole is provided on the rotating frame, and a float component is provided on the lid body. When the control unit receives a locking position signal, that is, when the rotating frame rotates to its position in the first rotation direction, the float component aligns with the limiting hole, so that when pressure is applied in the cooking space, the float component can enter the limiting hole. Through the cooperation between the float component and the limiting hole, the rotation of the rotating frame can be stopped, further improving safety in the pressure cooking mode.

[0048] Optionally, the rotating frame includes a frame and a connecting beam located inside the frame, and the limiting hole is provided on the connecting beam or at the intersection of two connecting beams;

[0049] When the control unit does not receive the engagement position signal and / or receives the abnormal flag signal of the drive motor, the position of the float component is offset from the position of the limiting hole.

[0050] According to this application, if the rotating frame is not rotated into place along the direction of the locking cover and / or an abnormality indicator signal is received, the float component cannot form an anti-rotation engagement with the rotating frame when it is pressed up in the cooking space because the position of the float component is misaligned with the limiting hole.

[0051] Optionally, the rotating frame is rotatable relative to the cover about a first axis. The rotating frame includes a guide hole with a fastening end and a disengaging end. The fastening end is closer to the first axis than the disengaging end. The fastening element is movably connected to the guide hole via a guide connector.

[0052] In step b, if the engagement position signal is received, it is determined that the guide connector is located at the engagement end of the guide hole and that the engagement member is located at the engagement position.

[0053] According to this application, based on the received engagement position signal, it can be determined that the guide connector connected to the engagement member is located at the engagement end of the guide hole, and that the engagement member is located in the engagement position.

[0054] Optionally, the rotating frame is rotatable relative to the cover about a first axis. The rotating frame includes a guide hole with a fastening end and a disengaging end. The fastening end is closer to the first axis than the disengaging end. The fastening element is movably connected to the guide hole via a guide connector.

[0055] If the disengagement position signal is received, it is determined that the guide connector is located at the disengagement end of the guide hole, and the fastener is located at the disengagement position.

[0056] According to this application, based on the received disengagement position signal, it can be determined that the guide connector connected to the fastener is located at the disengagement end of the guide hole, and that the fastener is located in the disengagement position.

[0057] Optionally, the rotating frame includes a frame, a connecting crossbeam, a first connecting longitudinal beam, and a second connecting longitudinal beam. The first and second connecting longitudinal beams are arranged at intervals and each intersects the connecting crossbeam. The connecting crossbeam, the first connecting longitudinal beam, the second connecting longitudinal beam, and the frame form a first clearance gap and a second clearance gap. The first and second clearance gaps are located on both sides of the connecting crossbeam. The cover is equipped with a steam valve and a circuit board receiving structure.

[0058] When the control unit receives the engagement position signal, one of the first connecting beam and the second connecting beam approaches but does not contact the steam valve, and the other of the first connecting beam and the second connecting beam approaches but does not contact the circuit board housing structure.

[0059] When the control unit receives the disengagement position signal, one of the first connecting beam and the second connecting beam approaches but does not contact the circuit board housing structure, and the other of the first connecting beam and the second connecting beam approaches but does not contact the steam valve.

[0060] According to this application, a first clearance gap and a second clearance gap are formed by the frame, the connecting crossbeam, the first connecting longitudinal beam and the second connecting longitudinal beam, so that the steam valve is accommodated and avoided by the first clearance gap and the circuit board receiving structure is accommodated and avoided by the second clearance gap. This can prevent the rotating frame from interfering with the steam valve and the circuit board receiving structure during the rotation of the rotating frame, and also helps to reduce the thickness of the lid in the height direction of the pressure cooking appliance.

[0061] Optionally, one end of the lid is rotatably connected to the pot body, and the other end is detachably connected to the pot body via a lid-closing hook; the rotating frame includes a transmission boss; and the position detection device includes a disengagement position detection device.

[0062] When the control unit receives the engagement position signal, the transmission boss engages with the lid latch to prevent the lid from being opened;

[0063] When the control unit receives the disengagement position signal from the disengagement position detection device, the transmission boss separates from the lid latch to allow the lid to be opened.

[0064] According to this application, the engagement of the transmission boss and the lid latch prevents external force from opening the lid. After cooking, the transmission boss disengages from the lid latch as the rotating frame rotates, allowing the lid to be opened. This improves the safety of the pressure cooker during pressure cooking.

[0065] 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.

[0066] According to the computer-readable storage medium of the second aspect of this application, a computer program can be stored to implement the above-described analysis and control method when executed. By applying the above-described control method, it is determined whether the appliance is properly engaged based on whether a engagement position signal is received, and the electric pressure relief device can be switched to the closed state when it is determined that the appliance is properly engaged, and switched to the open state when it is determined that the appliance is not properly engaged. This enables more accurate and safer control of the pressure cooking appliance.

[0067] A third aspect of this application provides a pressure cooking appliance, the pressure cooking appliance comprising:

[0068] The pot body includes a pot inner for containing food ingredients;

[0069] A lid, which is foldably disposed on the pot body;

[0070] 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.

[0071] A drive motor, which is connected to the cover locking and opening assembly;

[0072] A position detection device is disposed on the cover body, and the position detection device is arranged correspondingly to the cover locking and opening assembly to detect the position signal of the cover locking and opening assembly; and

[0073] A control unit is electrically connected to the drive motor and the position detection device. 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 to acquire the position signal of the position detection device and determine the state of the cover opening assembly based on the position signal.

[0074] According to the pressure cooking appliance of the third aspect of this application, the position signal of the locking and opening assembly is detected by the position detection device, and the state of the locking and opening assembly is determined based on whether the position signal is received. The opening and closing state of the electric pressure relief device can be controlled based on whether the assembly is properly engaged, thereby achieving more accurate and safer control of the pressure cooking appliance.

[0075] Optionally, the position detection device includes an engagement position detection device and a disengagement position detection device. The engagement position detection device is used to detect the engagement position signal of the cover opening assembly, and the disengagement position detection device is used to detect the disengagement position signal of the cover opening assembly.

[0076] According to this application, a latching position detection device detects the latching position signal of the cover opening assembly, so that the control unit can determine whether the cover opening assembly has switched to the latching state based on the latching position signal. A disengagement position detection device detects the disengagement position signal of the cover opening assembly, so that the control unit can determine whether the cover opening assembly has switched to the disengagement state based on the disengagement position signal.

[0077] Optionally, the drive motor is disposed on the cover;

[0078] The cover opening and closing assembly includes:

[0079] A rotating frame, rotatably mounted on the cover, connected to and driven by the drive motor to rotate; and

[0080] A fastening element, which is connected to the rotating frame and can be driven by the rotating frame to move between a fastened position and a disengaged position.

[0081] According to this application, a drive motor drives a rotating frame to rotate, thereby causing the fastening element to switch between a fastened position and a disengaged position.

[0082] Optionally, the fastening member is movably connected to the rotating frame between a fastened position and a disengaged position along the radial direction of the lid. When the lid is closed on the pot body, the fastening member in the fastened position prevents the lid from being opened, and when the fastening member is in the disengaged position, the lid can be opened.

[0083] According to this application, when the fastening element is in the fastened position, it can prevent the lid from opening relative to the pot body. When the fastening element is in the disengaged position, it allows the lid to open relative to the pot body.

[0084] 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 drively connected to the drive motor so as to move the fastening member under the drive of the drive motor.

[0085] According to this application, a drive motor drives a rotating frame to rotate, thereby causing the fastening element to move between a fastened position and a disengaged position, in order to change the connection state of the fastening element between the lid and the pot body. When the fastening element is in the fastened position, it can prevent the lid from opening; when the fastening element is in the disengaged position, it can open the lid.

[0086] The position detection device is arranged correspondingly to the rotating frame to detect the position signal of the rotating frame.

[0087] According to this application, by arranging the position detection device correspondingly to the rotating frame, the control unit can determine the position of the rotating frame based on the acquired position signal, thereby making it easier to more accurately know whether the fastening part has moved into place and its real-time position.

[0088] Optionally, the rotating frame includes a limiting hole;

[0089] The pressure cooking appliance includes a float component that is movably mounted on the cover between a normal pressure position and a high-pressure position. When the float component is in the high-pressure position, it is inserted into the limiting hole to prevent the rotating frame from rotating. When the float component is in the high-pressure position, it is disengaged from the limiting hole to allow the rotating frame to rotate.

[0090] 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.

[0091] Optionally, the cover includes a cover body, on which a float component is provided; the rotating frame is connected to the cover body and is constructed as a frame structure, and the rotating frame is 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.

[0092] 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.

[0093] Optionally, the rotating frame includes a frame and a connecting beam located inside the frame, and the limiting hole is provided on the connecting beam or at the intersection of two connecting beams;

[0094] When the control unit does not receive the engagement position signal and / or receives the abnormal flag signal of the drive motor, the position of the float component is offset from the position of the limiting hole.

[0095] 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.

[0096] Optionally, the rotating frame is rotatably connected to the cover about a first axis; the drive motor is located on the circumferential outer side of the rotating frame; the pressure cooking appliance further includes a transmission connector, one end of which is rotatably connected to the cover about a second axis and transmitted to the drive motor, and the other end is movably connected to the rotating frame, the second axis being parallel to the first axis.

[0097] 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.

[0098] Optionally, the rotating frame includes a frame with a transmission hole extending radially in a circle centered on the first axis; the end of the transmission connector away from the motor has a connecting shaft movably connected to the transmission hole.

[0099] 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.

[0100] 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.

[0101] 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. Attached Figure Description

[0102] 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,

[0103] Figure 1 A cross-sectional view of a pressure cooking appliance according to a preferred embodiment of this application;

[0104] Figure 2 An exploded view of a pressure cooking appliance according to a preferred embodiment of this application;

[0105] Figure 3 A perspective view of a pressure cooking appliance without a lid according to a preferred embodiment of this application;

[0106] Figure 4 for Figure 3 A cross-sectional view of the lid of a pressure cooking appliance, excluding the top cover;

[0107] Figure 5 for Figure 3 A schematic diagram of the rotating frame in the diagram;

[0108] Figure 6 for Figure 3 A top view of a pressure cooking appliance without the lid shown;

[0109] Figure 7 for Figure 3 Another top view of a pressure cooking appliance without the lid is shown;

[0110] Figure 8 for Figure 3 A top view of the assembly of the transmission connector and the drive motor in the middle;

[0111] Figure 9 for Figure 8 A cross-sectional view of the assembly of the transmission connector and the drive motor shown;

[0112] Figure 10 This is a part of a flowchart of a control method for a pressure cooking appliance according to a preferred embodiment of this application;

[0113] Figure 11 This is another part of a flowchart of a control method for a pressure cooking appliance according to a preferred embodiment of this application; and

[0114] Figure 12 This is a further part of a flowchart of a control method for a pressure cooking appliance according to a preferred embodiment of this application.

[0115] Explanation of reference numerals in the attached figures:

[0116] 100: Pot body 101: Inner pot

[0117] 102: Lid opening torsion spring; 104: Insulation cover.

[0118] 110: Cover body; 110a: Steam passage

[0119] 110b: Steam vent; 110c: Guide surface

[0120] 111: Faceplate 112: Liner

[0121] 113: Inner cover 1131: Inner cover sealing ring

[0122] 114: Steam valve; 116: Control circuit board

[0123] 117: Cover body; 120: Electric pressure relief device.

[0124] 121: Pressure ball; 122: Pressure relief drive component

[0125] 123: Top rod; 130: Cover locking and opening assembly.

[0126] 131: Fastener; 132: Rotating bracket

[0127] 132a: Guide hole; 132b: Limiting hole

[0128] 132c: Trigger part; 132d: Transmission boss

[0129] 132e: Transmission hole; 132g: First clearance gap

[0130] 132h: Frame; 132i: Connecting beam

[0131] 132j: Connecting crossbeam; 132k: First connecting longitudinal beam

[0132] 132m: Second connecting longitudinal beam; 132n: Second clearance gap

[0133] 132p: Clearance groove; 132r: Intersection.

[0134] 133: Transmission connector 133a: First end

[0135] 133a1: Limiting boss; 133b: Second end

[0136] 133c: Connecting shaft; 134: Drive motor

[0137] 134a: Motor shaft; 134b: Limiting recess.

[0138] 135: Force transmission component; 136: Float component

[0139] 137: Guide connector; 140: Position detection device

[0140] 141: Engagement position detection device; 142: Disengagement position detection device

[0141] 160: Closing hook P1: First extreme position

[0142] P2: Second extreme position; AX: Axis of rotation

[0143] AX1: First axis line; AX2: Second axis line

[0144] R1: First direction of rotation R2: Second direction of rotation

[0145] D1: Forward / backward direction; D2: Left / right direction.

[0146] D3: Height direction Detailed Implementation

[0147] 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.

[0148] 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.

[0149] 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.

[0150] 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.

[0151] 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.

[0152] 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.

[0153] like Figures 1 to 9 As shown, this application provides a pressure cooking appliance. The pressure cooking appliance may include a pot body 100, a lid 110, an electric pressure relief device 120, a position detection device 140, a temperature detection device, and a control unit.

[0154] 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.

[0155] The cooker body 100 includes a pot 101, a heating element (not shown), a control unit, and a temperature detection device (not shown). The pot 101, used to hold food, is removably installed in the cooker body 100. When the lid 110 closes the cooker body 100, a cooking space is formed between the lid 110 and the pot 101. The cooking space can also be referred to as a cooking cavity. The heating element can be configured as a heating plate, heating coil, or other heating device. The heating element is located at the bottom of the cooker body 100 and below the pot 101 to heat the food in the pot 101. The control unit can be a microcontroller unit (MCU) for controlling the cooking process of the pressure cooker. 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 cooker 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.

[0156] 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.

[0157] See Figure 2 The 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 cookware 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 pressure cooking appliance, such as sensors. The inner cover 113 is located at the innermost (i.e., lowest) side of the cover body 110 and is positioned below the liner 112. The inner cover 113 is detachably connected to the liner 112 via a snap-fit ​​or other detachable connector for easy cleaning and replacement. The inner cover 113 is oriented towards the cooking space. That is, when the cover body 110 is closed on the pot body 100, the inner cover 113 is positioned directly above the cooking space. Furthermore, an inner cover sealing ring 1131 is provided on the outer periphery of the inner cover 113. The inner cover sealing ring 1131 is used to seal the gap between the inner cover 113 and the pot body 101 when the inner cover 113 is closed with the pot body 101.

[0158] 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.

[0159] 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 pressure cooking appliance. In this application, the steam valve 114 is used to connect the cooking space with the external environment to release the steam generated during cooking.

[0160] 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.

[0161] According to the pressure 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 pressure cooking appliance and greatly enhancing the user experience.

[0162] 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.

[0163] 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 the pressure relief drive 122, thereby achieving switching between the open and closed states. When the pressure ball 121 is in the open position, the pressure cooking appliance can release pressure.

[0164] 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.

[0165] 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.

[0166] 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 to the pot body 100. The guide surface 110c can be configured as an inclined surface in the height direction D3 of the pressure 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.

[0167] 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.

[0168] 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.

[0169] 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.

[0170] To reduce heat loss during cooking, the pot body 100 includes a heat insulation cover 104, such as... Figure 2As shown. In this design, the fastening element 131 can engage with the edge of the inner pot 101 or the edge of the insulation cover 104. For example, in a rice cooker, the fastening element 131 can engage with the edge of the inner pot 101. For example, in an electric pressure cooker, the edge of the insulation cover 104 is at least partially exposed, and the fastening element 131 can engage with the edge of the insulation cover 104. For ease of explanation, the following description will focus on the example of the fastening element 131 engaging with the edge of the inner pot 101.

[0171] See Figure 2 For 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 pressure cooker 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 and unlocked 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 110 from separating from the inner pot 101. In the unlocked state, the lid locking / unlocking assembly 130 allows the inner lid 113 to separate from the inner pot 101. The inner lid 113 has a radial direction and an axial direction. The radial direction is the radial direction of a circle about the geometric center of the inner lid 113. The axial direction is a direction passing through the geometric center of the inner lid 113 and parallel to the thickness direction of the inner lid. The lid locking / unlocking assembly 130 includes a latch 131. The latch 131 may also be referred to as a hook, latch, or grab. The fastening element 131 is movably connected to the cover body 110 in a fastened position and a disengaged position along the radial direction of the inner cover 113. The locking and opening assembly 130 is in a fastened state when the fastening element 131 is in the fastened position. The locking and opening assembly 130 is in a disengaged state when the fastening element 131 is in the disengaged position. The fastening element 131 may include a clamp for receiving the edge of the inner pot 101 and the edge of the inner cover 113. When the fastening element 131 is in the fastened position, the edge of the inner pot 101 and the edge of the inner cover 113 are clamped in the clamp to limit the inner pot 101 and the inner cover 113 in the height direction D3 of the pressure cooking appliance, thereby preventing the inner pot 101 and the inner cover 113 from disengaging from each other, and thus ensuring that the cooking space can be pressurized. When the fastening element 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 fastening element 131 in the disengaged position is disengaged from the inner pot 101. The power source can be a drive motor 134. The drive motor 134 is driven to the fastening member 131. The drive motor 134 is connected to the control unit to drive the fastening member 131 to move between the fastened position and the disengaged position under the control of the control unit.

[0172] 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.

[0173] Continue reading Figures 2 to 7 Furthermore, the cover opening 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. 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.

[0174] 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.

[0175] 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 be driven by the rotating frame 132 to move in the radial direction of the inner cover 113.

[0176] See Figure 3 , Figures 6 to 8Furthermore, the cover-opening assembly 130 may also include a transmission connector 133. The transmission connector 133 has a first end 133a and a second end 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.

[0177] 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.

[0178] 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 trigger part 132c on the rotating frame 132 is detected by the disengaged position detection device 142, 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 connector 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 third extreme position. 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 trigger part 132c on the rotating frame 132 is detected by the fastening position detection device 141, 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.

[0179] See Figure 3 , Figure 6 as well as Figure 7 Optionally, the pressure cooking appliance may also include a manual part or manual element such as a force transmission member 135. The force transmission member 135 is connected to a first end 133a. The force transmission member 135 extends from the outer surface of the lid body 117 to be operable 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 force transmission member 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 force transmission member 135, thereby disengaging the inner lid 113 from the pot 101. Preferably, the force transmission member 135 can be manufactured as an integral part with the transmission connector 133. In the case where the force transmission member 135 is manually operated by the user, it may be referred to as a lever or actuator.

[0180] 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. The motor shaft 134a includes a limiting recess 134b, and correspondingly, the inner wall of the hole in the first end 133a is provided with a limiting boss 133a1. Through the cooperation of the limiting recess 134b and the limiting boss 133a1, the first end 133a can be plugged into the motor shaft 134a, and the first end 133a can be prevented from detaching from the motor shaft 134a in the axial direction.

[0181] 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.

[0182] 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.

[0183] See Figures 3 to 7Furthermore, the position detection device 140 of the pressure cooking appliance includes an engaged position detection device 141 and a disengaged position detection device 142. The engaged position detection device 141 generates an engaged position signal when the rotating frame 132 rotates to the engaged position, causing the fastener 131 to move to the engaged position. The disengaged position detection device 142 generates a disengaged position signal when the rotating frame 132 rotates to the disengaged position, causing the fastener 131 to move to the disengaged position. Both the engaged position detection device 141 and the disengaged position detection device 142 can be limit switches or position sensors. Both are electrically connected to a control unit. The control unit is configured to control the operating state of the drive motor 134 based on the engaged position signal detected by the engaged position detection device 141 and the disengaged position signal detected by the disengaged position detection device 142. The operating state of the drive motor 134 includes rotation and stopping of the motor shaft 134a.

[0184] Optionally, the position detection device 140 may include an engagement position detection device 141 and a disengagement position detection device 142. The engagement position detection device 141 generates an engagement position signal when the rotating frame 132 rotates to a position where the engaging member 131 moves to the engagement position. The disengagement position detection device 142 generates a disengagement position signal when the rotating frame 132 rotates to a position where the engaging member 131 moves to the disengagement position. Both the engagement position detection device 141 and the disengagement position detection device 142 may be limit switches, position sensors, or micro switches.

[0185] exist Figure 2 , Figure 3 , Figure 6 ,as well as Figure 7 In the example shown, the drive motor 134 is located at one end of the cover 110 along the front-rear direction D1, near the rotation axis AX. The drive motor 134 is also located in the middle of the cover 110 in the left-right direction D2. The engagement position detection device 141 and the disengagement position detection device 142 are located at one end of the cover 110 in the left-right direction D2, specifically on the same side of the cover 110 as the drive motor 134 in the left-right direction D2.

[0186] In other examples not shown, the engagement position detection device 141 and the disengagement position detection device 142 are located on both sides of the drive motor 134 in the left-right direction D2 of the cover 110.

[0187] See Figure 3 , Figures 5 to 7Optionally, the rotating frame 132 may include a trigger portion 132c. A latching position detection device 141 is located on one side of the trigger portion 132c in the circumferential direction surrounding the first axis AX1. The latching position detection device 141 is used to detect the position signal of the trigger portion 132c when the latching member 131 is in the latching position. That is, by detecting whether the rotating frame 132 has rotated to the correct position, the latching member 131 is indirectly determined to have reached the latching position. A disengagement position detection device 142 is located on the other side of the trigger portion 132c in the circumferential direction surrounding the first axis AX1. The disengagement position detection device 142 is used to detect the position signal of the trigger portion 132c when the latching member 131 is in the disengagement position. That is, by detecting whether the rotating frame 132 has rotated to the correct position, the disengagement position detection device 142 is indirectly determined to have reached the disengagement position. The trigger portion 132c is located at the edge of the rotating frame 132. The trigger part 132c and the aforementioned transmission hole 132e are arranged at intervals in the circumferential direction around the first axis AX1.

[0188] See Figure 5 Optionally, the rotating frame 132 may include a frame 132h and a connecting beam 132i located inside 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.

[0189] 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.

[0190] See also Figure 5Preferably, 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.

[0191] 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.

[0192] 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.

[0193] 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.

[0194] 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.

[0195] 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 allowance for 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.

[0196] 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.

[0197] 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.

[0198] See Figures 10 to 12This application provides a control method for a pressure cooking appliance. To facilitate the description of the control method, the structure of the pressure cooking appliance is briefly described below. The pressure cooking appliance includes a control unit, a lid 110, a drive motor 134, a rotating frame 132, a fastening element 131, a position detection device 140, and an electric pressure relief device 120. A steam passage 110a is provided on the lid 110. The drive motor 134 is located on the lid 110. The rotating frame 132 is located on the lid 110. The rotating frame 132 is connected to the drive motor 134 and can be driven by the drive motor 134 to rotate. The fastening element 131 is located on the lid 110. The fastening element 131 is connected to the rotating frame 132 and can be moved by the rotating frame 132 between a fastened position and a disengaged position. The position detection device 140 is located on the lid 110. The position detection device includes an engagement position detection device 141 corresponding to the engagement position and / or a disengagement position detection device 142 corresponding to the disengagement position. The position detection device is electrically connected to the control unit. An electric pressure relief device 120 is provided on the cover 110. The electric pressure relief device 120 is correspondingly provided with the steam passage 110a. The electric pressure relief device 120 has a closed state (blocking the steam passage 110a) and an open state (opening the steam passage 110a). The electric pressure relief device 120 is electrically connected to the control unit.

[0199] The control method includes the following steps:

[0200] Step a: Control the drive motor 134 to rotate along the first rotation direction R1 for a preset engagement time, thereby driving the rotating frame 132 to rotate and moving the fastening member 131 towards the engagement position. This preset engagement time is a preset time value or is derived or calculated based on the preset engagement angle of the rotating frame. The preset time value and preset engagement angle are pre-set in the control unit or stored in a memory that can be retrieved by the control unit.

[0201] Step b: The control unit determines whether it has received a latching position signal from the latching position detection device 141. If no latching position signal is received, the control unit controls the electric pressure relief device 120 to remain in the open state of the open steam passage 110a and executes the selected cooking function in atmospheric pressure mode, or activates the prompt element, or stops cooking. If a latching position signal is received, the control unit controls the electric pressure relief device 120 to switch to the closed state of the blocked steam passage 110a and executes the selected cooking function in pressure mode.

[0202] According to the control method of this application embodiment, whether the engagement is complete is determined based on whether an engagement position signal is received during the preset engagement time of the drive motor rotation. When it is determined that the engagement is complete, the electric pressure relief device 120 is controlled to switch to a closed state, and when it is determined that the engagement is incomplete, the electric pressure relief device 120 is controlled to switch to an open state. This achieves more accurate and safer control of the pressure cooking appliance.

[0203] Optionally, the control method includes:

[0204] If no engagement position signal is received, the abnormal flag signal of drive motor 134 is detected and it is determined whether drive motor 134 is faulty; or

[0205] Before performing the cooking process that requires pressure, the drive motor 134 is first controlled to rotate along the second rotation direction R2 by a preset rotation angle, and then steps a to b are executed sequentially. The preset rotation angle is smaller than the preset engagement angle in step b.

[0206] According to this application, in the absence of a locking position signal, the fault of the drive motor 134 can be determined by detecting the abnormal indicator signal of the drive motor 134, or by first controlling the drive motor 134 to rotate and then performing the locking operation to determine whether the locking is in place.

[0207] Optionally, the drive motor 134 includes a motor shaft 134a.

[0208] Control methods include:

[0209] In step a, the preset rotational speed of the motor shaft 134a and the ratio between the preset rotational speed of the motor shaft 134a and the rotational speed of the rotating frame 132 are first obtained. Then, the preset engagement time is determined based on the preset engagement angle, the preset rotational speed of the motor shaft 134a and the ratio.

[0210] According to this application, the preset engagement time can be determined by preset engagement angle, preset rotation speed of motor shaft 134a, and the ratio of preset rotation speed of motor shaft 134a to rotation speed of rotating frame 132.

[0211] Optionally, during step a, timing is performed. If no engagement position signal is received within the preset engagement time, it is determined whether an abnormal flag signal from the drive motor 134 has been received within the preset engagement time.

[0212] If no abnormality signal is received within the preset engagement time, the electric pressure relief device 120 is switched to the closed state of blocking the steam passage 110a and the selected cooking function is executed in pressure mode.

[0213] If an abnormality signal is received within the preset engagement time, the electric pressure relief device 120 is controlled to remain in the open state of the open steam passage 110a and execute the selected cooking function in atmospheric pressure mode, or activate the prompt element, or stop cooking.

[0214] According to this application, in cases where a locking position signal cannot be generated due to a malfunction such as a fault in the position detection device 140, the ability of the drive motor 134 to drive the rotating frame 132 to rotate into position is determined by whether an abnormality flag signal is received within a preset locking time. If no abnormality flag signal is received within the preset locking time, it indicates that the drive motor 134 rotates normally within the preset locking time, thereby driving the rotating frame 132 to rotate into position. If an abnormality flag signal is received within the preset locking time, it indicates that the normal rotation time of the drive motor 134 does not reach the preset locking time, thus failing to drive the rotating frame 132 to rotate into position.

[0215] Optionally, the control method includes:

[0216] The system obtains the cooking function selected by the user and determines whether the cooking process includes a pressure cooking step based on that function.

[0217] If a pressure cooking process is included, the system will stop the cooking process or execute the selected cooking function in normal pressure cooking mode if no engagement position signal is received. If an engagement position signal is received, the system will continue to execute the cooking process corresponding to the cooking function.

[0218] According to this application, when the selected cooking function includes a pressure cooking process, the subsequent cooking process can be automatically controlled based on whether a locking position signal is received, reducing human intervention and helping to improve the user experience.

[0219] Optionally, the cover 110 is provided with a manual part or manual element that is connected to the rotating frame 132 and can drive the rotating frame 132 to rotate.

[0220] Control methods include:

[0221] In step b, the prompting element outputs a locking alarm message to prompt the user to manually lock the cover. The prompting element can be an audible alarm device, a visual alarm device, an audible and visual alarm device, or a display component. The manual part or manual element can be the aforementioned force transmission component 135. The locking alarm message includes, for example, audible alarm messages, visual alarm messages, audible and visual alarm messages, and alarm messages displayed on the display component. An audible alarm message may be, for example, a buzzer sounding. A visual alarm message may be, for example, a flashing warning light. An audible and visual alarm message may be a combination of a buzzer sounding and a flashing warning light. The alarm message displayed on the display component may include, for example, displaying a fault code, graphic prompts, etc. The locking operation is performed manually, for example, by the user operating the force transmission component 135 to rotate the rotating frame 132, thereby moving the locking component 131 to the locking position and locking it in place.

[0222] According to this application, a locking alarm message can be output even when no locking position signal is received, so as to remind the user to manually lock the lid.

[0223] Optionally, the cover 110 is provided with a manual part or manual element that is connected to the rotating frame 132 and can drive the rotating frame 132 to rotate. The position detection device 140 includes a disengagement position detection device 142.

[0224] Control methods include:

[0225] After cooking is complete, the drive motor 134 is controlled to rotate in the second rotation direction R2, and it is determined whether a disengagement position signal is received from the disengagement position detection device 142.

[0226] If no release position signal is received, a release alarm message is output to prompt the user to manually release the device. The prompting element can be an audible alarm device, a visual alarm device, an audible and visual alarm device, or a display component. The manual part or manual element can be the aforementioned force transmission component 135. The release alarm message may include, for example, an audible alarm message, a visual alarm message, an audible and visual alarm message, or an alarm message displayed on the display component. An audible alarm message may be, for example, a buzzer sounding. An visual alarm message may be, for example, a flashing warning light. An audible and visual alarm message may be a combination of a buzzer sounding and a flashing warning light. The alarm message displayed on the display component may include, for example, displaying a fault code, graphic prompts, etc. Manual release by the user can be achieved, for example, by operating the force transmission component 135 to rotate the rotating frame 132, thereby moving the fastener 131 to the release position and thus releasing it completely.

[0227] According to this application, during the rotation of the drive motor along the second rotation direction R2, a disengagement alarm message can be output if no engagement position signal is received, so as to remind the user to perform a disengagement operation manually.

[0228] Optionally, the lid 110 includes a lid body 117 and a rotating frame 132 rotatably connected to the lid body 117. A float member 136 is provided on the lid body 117. The rotating frame 132 is provided with a limiting hole 132b for engaging with the float member 136. When the control unit receives a locking position signal, the position of the float member 136 aligns with the position of the limiting hole 132b. When the electric pressure relief device 120 switches to the off state and the pressure cooking appliance executes the selected cooking function in pressure mode, the float member 136 moves into the limiting hole 132b.

[0229] According to this application, a limiting hole 132b is provided in the rotating frame 132, and a float component 136 is provided on the lid body. When the control unit receives the engagement position signal, that is, when the rotating frame 132 rotates to the position in the first rotation direction R1, the float component 136 is aligned with the limiting hole 132b, so that when pressure is applied in the cooking space, the float component 136 can enter the limiting hole 132b. Through the cooperation between the float component 136 and the limiting hole 132b, the rotation of the rotating frame 132 can be stopped, further improving the safety in the pressure cooking mode.

[0230] Optionally, the rotating frame 132 includes a frame 132h and a connecting beam 132i located inside 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 control unit does not receive a locking position signal, the position of the float component 136 is offset from the position of the limiting hole 132b.

[0231] According to this application, when the rotating frame 132 is not rotated into position along the first rotation direction R1, the float component 136 is misaligned with the limiting hole 132b, thus preventing the float component 136 from forming an anti-rotation engagement with the rotating frame 132 when it presses down in the cooking space. It can be understood that the float component 136 moves upward when it presses down in the cooking space. This also indirectly indicates that when the rotating frame 132 is rotated into position along the first rotation direction R1, the float component 136 can move into the limiting hole 132b of the rotating frame 132 when it presses down in the cooking space, thereby forming an anti-rotation engagement with the rotating frame 132.

[0232] Optionally, the rotating frame 132 is rotatable relative to the cover 110 about a first axis AX1. The rotating frame 132 includes a guide hole 132a. The guide hole 132a has a snap-fit ​​end and a release end. The snap-fit ​​end is closer to the first axis AX1 than the release end. The snap-fit ​​member 131 is movably connected to the guide hole 132a via a guide connector 137.

[0233] In step b, if a snap-fit ​​position signal is received, it is determined that the guide connector 137 is located at the snap-fit ​​end of the guide hole 132a and the snap-fit ​​member 131 is in the snap-fit ​​position.

[0234] According to this application, based on the received engagement position signal, it can be determined that the guide connector 137 connected to the engagement member 131 is located at the engagement end of the guide hole 132a, and that the engagement member 131 is located in the engagement position.

[0235] Optionally, the rotating frame 132 is rotatable relative to the cover 110 about a first axis AX1. The rotating frame 132 includes a guide hole 132a. The guide hole 132a has a snap-fit ​​end and a release end. The snap-fit ​​end is closer to the first axis AX1 than the release end. The snap-fit ​​member 131 is movably connected to the guide hole 132a via a guide connector 137.

[0236] If a disengagement position signal is received, it is determined that the guide connector 137 is located at the disengagement end of the guide hole 132a, and the fastener 131 is in the disengagement position.

[0237] According to this application, based on the received disengagement position signal, it can be determined that the guide connector 137 connected to the fastener 131 is located at the disengagement end of the guide hole 132a, and that the fastener 131 is located in the disengagement position.

[0238] Optionally, the rotating frame 132 includes a frame 132h, a connecting crossbeam 132j, a first connecting longitudinal beam 132k, and a second connecting longitudinal beam 132m. The first connecting longitudinal beam 132k and the second connecting longitudinal beam 132m are arranged at intervals and each intersects the connecting crossbeam 132j. The connecting crossbeam 132j, the first connecting longitudinal beam 132k, the second connecting longitudinal beam 132m, and the frame 132h enclose a first clearance gap 132g and a second clearance gap 132n. The first clearance gap 132g and the second clearance gap 132n are located on both sides of the connecting crossbeam 132j. The cover 110 is provided with a steam valve 114 and a circuit board receiving structure.

[0239] When the control unit receives the engagement position signal, one of the first connecting longitudinal beam 132k and the second connecting longitudinal beam 132m approaches but does not contact the steam valve 114, and the other of the first connecting longitudinal beam 132k and the second connecting longitudinal beam 132m approaches but does not contact the circuit board housing structure.

[0240] When the control unit receives the disengagement position signal, one of the first connecting beam 132k and the second connecting beam 132m approaches but does not contact the circuit board housing structure, and the other of the first connecting beam 132k and the second connecting beam 132m approaches but does not contact the steam valve 114.

[0241] According to this application, a first clearance gap 132g and a second clearance gap 132n are formed by the frame 132h, the connecting crossbeam 132j, the first connecting longitudinal beam 132k, and the second connecting longitudinal beam 132m. The first clearance gap 132g accommodates and avoids the steam valve 114, and the second clearance gap 132n accommodates and avoids the circuit board receiving structure. This prevents the rotating frame 132 from interfering with the steam valve 114 and the circuit board receiving structure during the rotation of the rotating frame 132. It also helps to reduce the thickness of the cover 110 in the height direction of the pressure cooking appliance.

[0242] Optionally, one end of the lid 110 is rotatably connected to the pot body 100. The other end of the lid 110 is detachably connected to the pot body 100 via a lid latch 160. The rotating bracket 132 includes a drive boss 132d. The position detection device 140 includes a disengagement position detection device 142.

[0243] When the control unit receives the engagement position signal, the drive boss 132d engages with the lid latch 160 to prevent the lid 110 from being opened.

[0244] When the control unit receives the disengagement position signal from the disengagement position detection device 142, the transmission boss 132d separates from the lid latch 160 to allow the lid 110 to be opened.

[0245] 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, the transmission boss 132d disengages from the lid latch 160 as the rotating frame 132 rotates, allowing the lid 110 to be opened. This improves the safety of the pressure cooker in pressure cooking mode.

[0246] Embodiments of this application also provide a computer-readable storage medium. The computer-readable storage medium stores a computer program. When the computer program is executed, it implements the control method described above.

[0247] 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, it can determine whether the appliance is properly engaged based on whether a engagement position signal is received, and can control the electric pressure relief device 120 to switch to a closed state when it is determined that the appliance is properly engaged, and control the electric pressure relief device 120 to switch to an open state when it is determined that the appliance is not properly engaged. This enables more accurate and safer control of the pressure cooking appliance.

[0248] The pressure cooking appliance control method according to the embodiments of this application applies to a pressure cooking appliance in which a stepper motor is added to the lid 110 as a drive motor 134. The motor shaft 134a of the drive motor 134 is connected to the fastening linkage mechanism via a transmission connector 133. The fastening linkage mechanism includes a rotating frame 132 and a fastening member 131. By reversing or forward rotating the drive motor 134, the fastening member 131 automatically locks or unlocks the lid. 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.

[0249] One technical problem encountered in one application scenario of this application is that the fastener 131 cannot lock securely with the inner pot and the inner lid, meaning the lid is not properly locked. In this situation, normal pressurized cooking cannot proceed. However, it is impossible to determine whether the drive motor 134 is faulty.

[0250] In one embodiment of the solution to this technical problem, the drive motor 134 itself is not faulty, the rotating frame 132 may jam, and the position detection device 140 may malfunction. The principle of fault detection can then be:

[0251] The control unit controls the rotation of the drive motor 134. If a position signal is received within a preset time period, the position detection device 140 is functioning normally. If no position signal is received within the preset time period, the position detection device 140 is malfunctioning. If neither a position signal nor an abnormality indicator signal from the drive motor 134 is received within the preset time period, it can be determined that the rotating frame 132 has rotated to the correct position. If no position signal is received within the preset time period, but an abnormality indicator signal from the drive motor 134 is received, it can be determined that the rotating frame 132 is stuck and cannot rotate to the correct position. If the rotation direction of the drive motor 134 is the first rotation direction R1, the preset time period can be referred to as the preset engagement time period. If the rotation direction of the drive motor 134 is the second rotation direction R2, the preset time period can be referred to as the preset disengagement time period.

[0252] In the embodiments of this application, the cooking process checks for the engagement position signal twice, at the initial stage and the pressure-up stage, which improves the accuracy of fault detection. The control unit can determine whether the lid is locked based on the lid's position. If it is not locked, it is used as a regular rice cooker or a pressure cooker, and the cooking process continues using the regular rice cooker program. If it is locked, it indicates that everything is normal, and the selected pressure cooking function is used to continue the pressure cooking process. In this way, whether the lid is malfunctioning or not does not affect the user's use, thus improving the user experience.

[0253] In the event of a power outage or other situation that prevents the drive motor 134 from operating, the fastening element 131 will not automatically release, and the rice cooker will not open. In this case, the force transmission element 135 on the pressure cooker can be used to disengage it. The force transmission element 135 is connected to the fastening element linkage mechanism. Through the lever principle, moving the force transmission element 135 causes the fastening element linkage mechanism to move, thereby loosening the fastening element 131 from the inner pot and inner lid, achieving the purpose of disengagement.

[0254] The control unit is configured to determine whether the engagement position detection device 141 is functioning correctly. If the control unit detects a low-level output from the engagement position detection device 141 when the engagement member 131 is not in the engagement position, it determines that the engagement position detection device 141 is malfunctioning. If the control unit detects a low-level output from the disengagement position detection device 142 when the engagement member 131 is not in the disengagement position, it determines that the disengagement position detection device 142 is malfunctioning.

[0255] The following section uses the rice cooking function as an example to provide a detailed description of the analysis and control method of one embodiment of this application.

[0256] 1. Cooking Preparation Stage

[0257] Selecting the rice cooking function and pressing the start button sends a signal to the drive motor 134 to rotate in the first rotation direction R1, controlling the drive motor 134 to rotate a certain angle and then stop, for example, rotating 90° to 110°. Preferably, the drive motor 134 rotates 100°. This can be understood as determining whether the fastening member 131 has moved to the fastening position based on whether the drive motor 134 can rotate a certain angle.

[0258] The control unit first determines whether the latching position detection device 141 is functioning correctly. The latching position detection device 141 is flagged as W1 in the control unit. Initially, flag W1 is, for example, high level "1" or low level "0". If the latching position detection device 141 is determined to be faulty, an alarm message is output. This output alarm message may include, for example, an audible and visual alarm, a buzzer sound, a flashing light, and an error code displayed on the display module. The audible and visual alarm can be understood as a combination of a buzzer sound and a flashing light. The display module can be referred to as a display component, and includes display devices such as digital tubes and displays. If the latching position detection device 141 is functioning correctly, the drive motor is controlled to rotate along the first rotation direction R1 until the latching position detection device 141 changes from high level to low level or from low level to high level. This is considered as the latching position detection device 141 generating a latching position signal, indicating that the rotating frame has rotated to the correct position and the latching cover is locked. In this case, the electric pressure relief device 120 is switched to the closed state of the sealed steam passage 110a to allow pressure build-up. If the engagement position detection device 14 malfunctions, the control unit will not receive an engagement position signal (either transitioning from high to low or low to high) after the drive motor rotates in the first rotation direction R1. In this case, the electric pressure relief device 120 is switched to or remains in the open state of the open steam passage 110a to prevent pressure buildup. The control unit obtains the initial bottom temperature T10 via the bottom temperature detection device and the initial top temperature T20 via the top temperature detection device. The real-time angle of the rotating frame 132 during rotation has a range, for example, 0° to 100°. The first target angle is 100°, and the second target angle is 0°.

[0259] 2. Cooking stage

[0260] (1) Preheating and water absorption stage

[0261] 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.

[0262] (2). Rapid boiling and pressurization stage

[0263] 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.

[0264] If the rotation angle of the drive motor 134 is between 95° and 105° or no abnormality signal is received within the preset engagement time of the drive motor 134, it indicates that the lock cover is in place, that is, the fastening member 131 has reached the engagement position.

[0265] If no engagement position signal was received during the previous lid locking operation, during the pressing phase, the control unit controls the drive motor 134 to first rotate along the second rotation direction R2 by a certain angle, such as 50°, and then controls the drive motor 134 to rotate along the first rotation direction R1 by an angle, such as 100 degrees. If the control unit cannot receive the engagement position signal during the rotation of the drive motor 134, it indicates that the engagement position detection device 141 is malfunctioning. At this time, the control unit controls the pressurization to stop, that is, the electric pressure relief device 120 switches to or remains in the open state of the open steam passage 110a, reduces the heat, and runs the normal rice cooker program.

[0266] If a locking position signal is received during the previous locking operation, the pressure cooker will normally pressurize and then release pressure. Then, the drive motor 134 will rotate 100° (equivalent to 100°) in the second rotation direction R2, causing the locking element 131 to move to the disengaged position for automatic unlocking. The disengagement is determined based on the rotation angle of the drive motor 134, for example, 100°, and the normal pressure cooking process continues. In this case, the electric pressure relief device 120 can be switched to the closed state, blocking the steam passage 110a. Pressure buildup begins in the cooking space, and the pressure buildup time is timed. Within the preset pressure buildup time t2, the maximum temperature T23 detected by the top temperature sensor is recorded in real time. T23 ≤ (T22 + 10) (up to 50 kPa under standard atmospheric pressure). When the pressure buildup time reaches the preset pressure buildup time t2, or the maximum temperature detected by the top temperature sensor exceeds (T22 + 10), the next stage (pressure holding and boiling maintenance stage) begins. The preset pressing time t2 is ≤ 10 min, preferably 8 min. During the pressing stage, the float component floats up under the pressure of 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.

[0267] If the rotation angle of the drive motor 134 is less than 95°, it indicates that the locking of the cover is unsuccessful, meaning that the fastening part 131 has not reached the locking position. The control unit then controls the drive motor 134 to rotate first along the second rotation direction R2 to rotate the rotating frame 132 by a certain angle, such as 50°, and then controls the drive motor 134 to rotate along the first rotation direction R1 by an angle, such as 100°. If an abnormality signal is received from the drive motor 134 within the preset locking time, the control unit will not pressurize or will not execute the relevant pressing cooking process, and will control the electric pressure relief device to not work. The heating device will be 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.

[0268] (3) Pressure holding and boiling stage

[0269] Standard cooking procedures:

[0270] 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.

[0271] Pressure cooking process:

[0272] 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.

[0273] (4) Cooking Rice Stage

[0274] Standard rice cooker program:

[0275] 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.

[0276] Pressure cooker program:

[0277] 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 or less, the control unit begins to control the operation of the electric pressure relief device 120 to vent air through the steam channel 110a. This 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 continuously venting air through the steam channel 110a, 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 controlled to switch 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 the open and closed states to perform the first stage of intermittent venting. In the first stage of venting, the control unit automatically adjusts the pressure relief frequency or operating frequency of the electric pressure relief device 120 according to the real-time cooking temperature T24 before pressure relief. 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 pressure relief 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 pressure relief 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 pressure relief 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 second stage of venting begins. The control unit then controls the electric pressure relief device 120 to switch to and remain in the open state. In some examples, when the countdown reaches 5 minutes, for example, venting occurs once at 8 seconds (i.e., 4 minutes 52 seconds), 16 seconds (i.e., 4 minutes 44 seconds), and 24 seconds (i.e., 4 minutes 36 seconds), for a total of 3 venting operations. Immediately afterwards, the electric pressure relief device is controlled to switch to the closed state and maintain it for 1 second (i.e., 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 is controlled to switch to the open state to keep the steam passage open for continuous venting. After the exhaust begins, control the buzzer to sound 30 times, each sound lasting approximately 0.5 seconds, with an interval of approximately 0.5 seconds between each sound.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. During the rotation of the drive motor 134 in the second rotation direction R2, if the disengagement position detection device 142 does not generate a disengagement position signal, the disengagement position detection device 142 may be faulty. The third power is less than 30% of the rated power of the heating device. The disengagement position detection device 142 not generating a disengagement position signal can be understood as the flag bit W2 corresponding to the disengagement position detection device 142 in the control unit always being at a low level "0" or a high level "1". When the countdown reaches 0, the cooking stage ends, and the heat preservation stage begins.

[0278] (5) Insulation stage

[0279] 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.

[0280] 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 mean either that one component is directly attached to another component or that one component is attached to another component via an intermediary. Features 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. 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 the application to the described embodiments. Those skilled in the art will understand that many variations and modifications can be made based on the teachings of this application, all of which fall within the scope of protection claimed in this application.

Claims

1. A control method for a pressure cooking appliance, characterized in that, The pressure cooking appliance includes: Control unit; The cover (110) is provided with a steam passage (110a) and an electric pressure relief device (120) corresponding to the steam passage (110a), the electric pressure relief device (120) being electrically connected to the control unit; A rotating frame (132) is provided on the cover (110), and the rotating frame (132) is provided with a fastening element (131); A drive motor (134) is disposed on the cover (110), and the drive motor (134) is connected to the rotating frame (132) for driving the rotating frame (132) to rotate; and A position detection device (140) is disposed on the cover (110) and is used to detect the position of the fastening member (131). The position detection device (140) includes a fastening position detection device (141) and is electrically connected to the control unit. The control method includes the following steps: Step a: Control the drive motor (134) to rotate along the first rotation direction (R1) for a preset engagement time, wherein the preset engagement time is a preset time value or is obtained according to the preset engagement angle of the rotating frame (132); Step b: The control unit determines whether it has received a fastening position signal from the fastening position detection device (141). If the engagement position signal is not received, the electric pressure relief device (120) is controlled to remain in the open state of the open steam passage (110a) and the selected cooking function is executed in atmospheric pressure mode, or the prompt element is activated, or cooking is stopped. If the engagement position signal is received, the electric pressure relief device (120) is controlled to switch to the closed state of blocking the steam passage (110a) and the selected cooking function is executed in pressure mode.

2. The control method according to claim 1, characterized in that, The control method includes: If the engagement position signal is not received, the abnormality flag signal of the drive motor (134) is detected and it is determined whether the drive motor is faulty; or Before performing the cooking process that requires pressure, the drive motor (134) is controlled to rotate along the second rotation direction (R2) by a preset rotation angle, and then steps a to b are executed sequentially. The preset rotation angle is less than the preset engagement angle.

3. The control method according to claim 2, characterized in that, The drive motor (134) includes a motor shaft (134a). The control method includes: In step a, the preset rotational speed of the motor shaft (134a) and the ratio between the preset rotational speed of the motor shaft (134a) and the rotational speed of the rotating frame (132) are first obtained. Then, the preset engagement time is determined according to the preset engagement angle, the preset rotational speed of the motor shaft (134a) and the ratio.

4. The control method according to claim 3, characterized in that, The control method includes: When performing step a, if the engagement position signal is not received within the preset engagement time, it is determined whether an abnormal flag signal from the drive motor (134) has been received within the preset engagement time. If the abnormal flag signal is not received within the preset engagement time, the electric pressure relief device (120) is controlled to switch to the closed state of blocking the steam passage (110a) and the selected cooking function is executed in pressure mode. If the abnormality signal is received within the preset engagement time, the electric pressure relief device (120) is controlled to remain in the open state of the open steam passage (110a) and the selected cooking function is executed in atmospheric pressure mode, or the prompt element is activated, or cooking is stopped.

5. The control method according to claim 1, characterized in that, The control method includes: The system obtains the cooking function selected by the user and determines whether the cooking process includes a pressure cooking step based on the selected cooking function. If a pressure cooking process is included, then if the engagement position signal is not received, the cooking process is stopped or the selected cooking function is executed in normal pressure cooking mode. If the engagement position signal is received, the cooking process corresponding to the cooking function is executed.

6. The control method according to claim 1, characterized in that, The cover (110) is provided with a manual part or manual element that is connected to the rotating frame (132) and can drive the rotating frame (132) to rotate. The control method includes: In step b, the prompting element outputs a fastening alarm message to prompt the user to manually fasten the device.

7. The control method according to claim 1, characterized in that, The cover (110) is provided with a manual part or manual element connected to the rotating frame (132) and capable of driving the rotating frame (132) to rotate; the position detection device (140) includes a disengagement position detection device (142). The control method includes: After cooking is complete, the drive motor (134) is controlled to rotate in the second rotation direction (R2), and it is determined whether a disengagement position signal has been received from the disengagement position detection device (142). If the detachment position signal is not received, a detachment alarm message will be output to prompt the user to detach manually.

8. The control method according to any one of claims 1 to 7, characterized in that, The cover (110) includes a cover body, which is provided with a float component (136); The rotating frame (132) is provided with a limiting hole (132b) for engaging with the float component (136); When the control unit receives the engagement position signal, the position of the float component (136) is aligned with the position of the limiting hole (132b); During the process of the electric pressure relief device (120) switching to the off state and the pressure cooking appliance performing the selected cooking function in pressure mode, the float component (136) moves into the limiting hole (132b).

9. The control method according to claim 8, characterized in that, The rotating frame (132) includes a frame (132h) and a connecting beam (132i) located inside the frame (132h). The limiting hole (132b) is provided at the intersection of the connecting beam (132i) or two connecting beams (132i). When the control unit does not receive the engagement position signal and / or receives the abnormal flag signal from the drive motor (134), the position of the float component (136) is offset from the position of the limiting hole (132b).

10. The control method according to claim 1, characterized in that, The rotating frame (132) is rotatable relative to the cover about a first axis (AX1). The rotating frame (132) includes a guide hole (132a) having a fastening end and a disengaging end. The fastening end is closer to the first axis (AX1) than the disengaging end. The fastening member (131) is movably connected to the guide hole (132a) via a guide connector (137). The control method includes: In step b, if the engagement position signal is received, it is determined that the guide connector (137) is located at the engagement end of the guide hole (132a), and the engagement member (131) is located at the engagement position.

11. The control method according to claim 7, characterized in that, The rotating frame (132) is rotatable relative to the cover about a first axis (AX1). The rotating frame (132) includes a guide hole (132a) having a fastening end and a disengaging end. The fastening end is closer to the first axis (AX1) than the disengaging end. The fastening member (131) is movably connected to the guide hole (132a) via a guide connector (137). The control method includes: If the disengagement position signal is received, it is determined that the guide connector (137) is located at the disengagement end of the guide hole (132a) and the fastener (131) is located at the disengagement position.

12. The control method according to claim 1, characterized in that, The rotating frame (132) includes a frame (132h), a connecting crossbeam (132j), a first connecting longitudinal beam (132k), and a second connecting longitudinal beam (132m). The first connecting longitudinal beam (132k) and the second connecting longitudinal beam (132m) are arranged at intervals and each intersects with the connecting crossbeam (132j). The connecting crossbeam (132j), the first connecting longitudinal beam (132k), the second connecting longitudinal beam (132m), and the frame (132h) form a first clearance gap (132g) and a second clearance gap (132n). The first clearance gap (132g) and the second clearance gap (132n) are located on both sides of the connecting crossbeam (132j). The cover (110) is provided with a steam valve (114) and a circuit board receiving structure. When the control unit receives the engagement position signal, one of the first connecting beam (132k) and the second connecting beam (132m) approaches but does not contact the steam valve (114), and the other of the first connecting beam (132k) and the second connecting beam (132m) approaches but does not contact the circuit board housing structure. When the control unit receives the disengagement position signal, one of the first connecting beam (132k) and the second connecting beam (132m) approaches but does not contact the circuit board housing structure, and the other of the first connecting beam (132k) and the second connecting beam (132m) approaches but does not contact the steam valve (114).

13. The control method according to claim 1, characterized in that, 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 transmission boss (132d), and the position detection device (140) includes a disengagement position detection device (142). When the control unit receives the engagement position signal, the transmission boss (132d) engages with the cover hook (160) to prevent the cover (110) from being opened; When the control unit receives the disengagement position signal from the disengagement position detection device (142), the transmission boss (132d) separates from the cover hook (160) to allow the cover (110) to be opened.

14. 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 13.

15. A pressure cooking appliance, characterized in that, The pressure 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 (101) and the lid (110). A drive motor (134) is driven to the cover opening assembly (130); A position detection device (140) is disposed on the cover (110), and the position detection device (140) is correspondingly arranged with the cover locking and opening assembly (130) to detect the position signal of the cover locking and opening assembly (130); and The control unit is electrically connected to the drive motor (134) and the position detection device (140). 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 to acquire the position signal of the position detection device (140) and determine the state of the cover opening assembly (130) based on the position signal.

16. The pressure cooking appliance according to claim 15, characterized in that, The position detection device (140) includes a latching position detection device (141) and a disengagement position detection device (142). The latching position detection device (141) is used to detect the latching position signal of the cover opening assembly (130), and the disengagement position detection device (142) is used to detect the disengagement position signal of the cover opening assembly (130).

17. The pressure cooking appliance according to claim 15, characterized in that, The drive motor (134) is disposed on the cover (110); The cover opening assembly (130) includes: A rotating frame (132) is rotatably mounted on the cover (110), the rotating frame (132) is connected to the drive motor (134) and can be driven by the drive motor (134) to rotate; and The fastening element (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.

18. The pressure cooking appliance according to claim 17, characterized in that, The fastening element is movably connected to the rotating frame (132) along the radial direction of the cover (110) between the fastening position and the disengaged position. When the cover (110) is closed on the pot body (100), the fastening element (131) in the fastening position prevents the cover (110) from being opened. When the fastening element (131) is in the disengaged position, the cover (110) can be opened.

19. The pressure cooking appliance according to claim 17, 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 extending direction of the guide hole (132a) intersects the radial direction of the cover (110). The fastening member is slidably connected to the guide hole (132a) along the extending direction. The rotating frame (132) is driven by the drive motor (134) to move the fastening member (131) under the drive of the drive motor (134).

20. The pressure cooking appliance according to claim 17, characterized in that, The position detection device (140) is arranged correspondingly to the rotating frame (132) to detect the position signal of the rotating frame (132).

21. The pressure cooking appliance according to claim 17, characterized in that, The rotating frame (132) includes a limiting hole (132b); the pressure cooking appliance includes a float component (136) movably mounted on the cover (110) between a normal pressure position and a pressurized position. In the pressurized position, the float component (136) is inserted into the limiting hole (132b) to prevent the rotating frame (132) from rotating, and in the pressurized position, the float component (136) is disengaged from the limiting hole (132b) to allow the rotating frame (132) to rotate.

22. The pressure cooking appliance according to any one of claims 17 to 21, characterized in that, The cover (110) includes a cover body (117), on which a float component is provided; the rotating frame (132) is connected to the cover body (117) and is constructed as a frame structure, and the rotating frame (132) is provided with a limiting hole for engaging with the float component; When the cover 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).

23. The pressure cooking appliance according to claim 22, characterized in that, The rotating frame (132) includes a frame (132h) and a connecting beam (132i) located inside the frame (132h). The limiting hole (132b) is provided on the connecting beam (132i) or at the intersection of two connecting beams (132i). When the control unit does not receive the engagement position signal and / or receives the abnormal flag signal of the drive motor (134), the position of the float component (136) is offset from the position of the limiting hole (132b).

24. The pressure cooking appliance according to claim 17, 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 pressure cooking appliance also includes: A transmission connector (133) is provided, 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), wherein the second axis (AX2) is parallel to the first axis (AX1).

25. The pressure cooking appliance according to claim 24, 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).

26. The pressure cooking appliance according to claim 24, 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).

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