Methods for controlling cooking appliances, computer-readable storage media, and cooking appliances

Abstract

This application provides a control method for a cooking appliance, a computer-readable storage medium, and the cooking appliance itself. The control method includes detecting a power outage signal. After detecting the power outage signal, the instantaneous gas pressure within the cooking cavity of the cooking appliance is determined. Determining the number of times an electric pressure relief device is activated and deactivated based on the instantaneous gas pressure includes comparing the instantaneous gas pressure with a safe gas pressure threshold, a first gas pressure threshold, and a second gas pressure threshold, respectively. If the instantaneous gas pressure is not greater than the safe gas pressure threshold, the required number of activations and deactivations for the electric pressure relief device is determined to be 0. If the instantaneous gas pressure is greater than the safe gas pressure threshold, the required number of activations and deactivations for the electric pressure relief device is determined to be at least N1 times, where N1 is a positive integer and N1 ≥ 1. This application, by controlling the electric pressure relief device to release pressure in the cooking cavity after a power outage, can reduce the pressure within the cooking cavity, thereby improving the safety of the cooking appliance.

Description

Technical Field

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

[0002] Pressure cookers, also known as pressure pots, pressure cookers, or pressure cookers, are kitchen cooking appliances. They work by utilizing the physical phenomenon that the boiling point of a liquid increases under higher pressure. By applying pressure to water, the water reaches a higher temperature without boiling, thus speeding up the cooking process. Pressure cookers can heat food to over 100°C. Especially in high-altitude areas, pressure cookers effectively solve the problem of food not cooking properly due to the lower boiling point of water. Electric pressure cookers are a type of pressure cooker.

[0003] Electric pressure cooking appliances in related technologies include electrically operated pressure relief devices for opening and closing the steam passage. These devices automatically reset after power failure, opening the steam passage and immediately releasing pressure. If the pressure inside the electric pressure cooking appliance was high before power failure, the hot liquid or steam inside may rapidly splash or spray out after power failure, posing a risk of scalding the user.

[0004] Therefore, there is a need to provide a method for controlling a cooking appliance, a computer-readable storage medium, and a cooking appliance to at least partially solve the above problems. Summary of the Invention

[0005] 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.

[0006] To at least partially solve the above problems, a first aspect of this application provides a method for controlling a cooking appliance, the cooking appliance comprising:

[0007] The control unit has a preset safe air pressure threshold, a first air pressure threshold, and a second air pressure threshold, wherein the safe air pressure threshold, the first air pressure threshold, and the second air pressure threshold increase sequentially.

[0008] The pot body, wherein the pot body is provided with a pot inner; and

[0009] The lid is closable and connected to the pot body. When the lid is closed on the pot body, a cooking cavity is formed between the lid and the inner pot. The lid is provided with a steam passage communicating with the cooking cavity and an electric pressure relief device corresponding to the steam passage. The electric pressure relief device is electrically connected to the control unit.

[0010] The control method for the cooking appliance includes:

[0011] Detect for a power outage signal;

[0012] After a power failure signal is detected, the instantaneous gas pressure inside the cooking cavity of the cooking appliance is determined;

[0013] The control unit determines the number of times the electric pressure relief device is started and stopped based on the instantaneous air pressure, including:

[0014] When the instantaneous air pressure is not greater than the safe air pressure threshold, the start-stop count of the electric pressure relief device is determined to be 0 times.

[0015] When the instantaneous air pressure is greater than the safe air pressure threshold and not greater than the first air pressure threshold, the number of times the electric pressure relief device is started and stopped is determined to be at least N1 times, where N1 is a positive integer and N1≥1;

[0016] When the instantaneous air pressure is greater than the first air pressure threshold and not greater than the second air pressure threshold, the number of times the electric pressure relief device is started and stopped is determined to be at least N2 times, where N2 is a positive integer and N2 > N1.

[0017] According to the control method for a cooking appliance of the first aspect of this application, after a power outage signal is detected, the number of times the electric pressure relief device is started and stopped is determined based on the instantaneous air pressure in the cooking cavity, and the start / stop state of the electric pressure relief device is controlled according to the number of starts and stops. If the instantaneous air pressure is not greater than the safe air pressure threshold, there is no need to control the start / stop of the electric pressure relief device. If the instantaneous air pressure exceeds the safe air pressure threshold, the number of times the electric pressure relief device is started and stopped is controlled according to the air pressure range in which the instantaneous air pressure is located, thereby reducing the pressure in the cooking cavity. Compared with the related technology of directly releasing pressure after a power outage, this application can automatically release pressure through electronic control based on the instantaneous air pressure in the power outage state, greatly reducing the danger of pressure release in the cooking appliance in the power outage state, thereby improving the safety of the cooking appliance.

[0018] Optionally, the method for determining the instantaneous gas pressure within the cooking cavity of the cooking appliance includes:

[0019] First, the instantaneous temperature inside the cooking cavity is detected. Then, based on the detected instantaneous temperature, the instantaneous pressure is determined by querying the instantaneous temperature-instantaneous pressure correspondence table inside the cooking cavity.

[0020] According to this application, instantaneous air pressure is determined by first detecting the instantaneous temperature and then converting the detected instantaneous temperature into instantaneous air pressure.

[0021] Optionally, the cooking appliance is equipped with a pressure detection device that communicates electronically with the control unit.

[0022] The method for determining the instantaneous air pressure within the cooking cavity of the cooking appliance includes:

[0023] The control unit acquires the real-time air pressure inside the cooking cavity detected by the air pressure detection device.

[0024] According to this application, real-time air pressure can be obtained directly.

[0025] Optionally, the control method for the cooking appliance further includes:

[0026] When a power-on signal is detected, the power-off time t from the power-off signal to the power-on signal is calculated, and it is determined whether the power-off time t is greater than a first preset time.

[0027] If t is greater than the first preset time, then the system enters standby mode.

[0028] According to this application, if power is restored after a power outage time t that is longer than a first preset time, the device enters a standby state so that the user can determine whether to cook.

[0029] Optionally, the control method for the cooking appliance further includes:

[0030] When a power-on signal is detected, the power-off time t from the power-off signal to the power-on signal is calculated, and it is determined whether the power-off time t is greater than a first preset time.

[0031] If t is less than or equal to the first preset time, the cooking function selected before the power failure signal was detected and the cooking stage in progress are obtained, and the cooking is controlled to continue from the cooking stage in progress before the power failure signal according to the selected cooking function and the cooking stage in progress before the power failure signal.

[0032] According to this application, if power is restored after a power outage time t less than or equal to a first preset time, cooking will automatically continue based on the cooking function selected before the power outage and the cooking stage that was in progress before the power outage, without user intervention, which is more convenient and helps to improve the user experience.

[0033] Optionally, before controlling the continuation of cooking, it is first determined whether the cooking function selected before the power-off signal includes a cooking stage where the cooking pressure is greater than the safe pressure threshold.

[0034] If the cooking function selected before the power-off signal includes a cooking stage where the cooking pressure is greater than the safe pressure threshold, then it is determined whether a locking position signal has been received.

[0035] If the engagement position signal is not received, the drive motor is controlled to rotate in the first rotation direction until the engagement position signal is received, or...

[0036] The start signal indicator element emits a prompt signal, or,

[0037] Stop cooking.

[0038] According to this application, before continuing cooking, it is first determined whether the cooking function before the power outage included a cooking stage where the cooking pressure exceeded the safe pressure threshold. If so, it is then determined whether a locking position signal has been received. If no locking position signal is received, the drive motor is controlled to rotate to lock the lid. This ensures that cooking functions requiring pressurization are performed with the lid locked. A warning signal can also be issued via a signal indicator element to allow the user to promptly detect and address any cooking abnormalities. Cooking can also be stopped.

[0039] Optionally, in the standby state, the drive motor is controlled to rotate along the second rotation direction until a disengagement signal is detected, or...

[0040] The start signal indicator element emits a prompt signal.

[0041] According to this application, in standby mode, the drive motor is controlled to rotate in a second rotation direction to disengage and open the lid of the cooking appliance. A warning signal can also be emitted via a signal indicator to allow the user to promptly detect and address any abnormalities.

[0042] Optionally, the safe air pressure threshold ranges from 4 kPa to 0 kPa, and / or,

[0043] The first air pressure threshold ranges from 30 kPa to 4 kPa, and / or,

[0044] The range of the second air pressure threshold is 50 kPa to 30 kPa.

[0045] According to this application, the range of the safe air pressure threshold can be set from 4 kPa to 0 kPa, the range of the first air pressure threshold can be set from 30 kPa to 4 kPa, and the range of the second air pressure threshold can be set from 50 kPa to 30 kPa.

[0046] Optionally, after determining that the instantaneous air pressure in the cooking cavity is greater than the safe air pressure threshold, the electric pressure relief device is activated once every second preset time interval.

[0047] According to this application, the electric pressure relief device is controlled to start and stop intermittently at a second preset time interval.

[0048] Optionally, after determining that the instantaneous air pressure in the cooking cavity is greater than the safe air pressure threshold, the electric pressure relief device is controlled to run continuously for a third preset time after each start-up.

[0049] According to this application, the electric pressure relief device is controlled to run continuously for a third preset time after each start-up.

[0050] Optionally, N1 = 1, and / or N2 = 2.

[0051] According to this application, if the instantaneous air pressure is greater than the safe air pressure threshold and not greater than the first air pressure threshold, then the number of start-stop cycles required for the electric pressure relief device is determined to be at least 1. If the instantaneous air pressure is greater than the first air pressure threshold and not greater than the second air pressure threshold, then the number of start-stop cycles required for the electric pressure relief device is determined to be at least 2.

[0052] Optionally, if the instantaneous air pressure is greater than the safe air pressure threshold, then the required number of start-stop cycles for the electric pressure relief device is determined to be at least N, where N = N1 or N = N2.

[0053] The third preset time is t0, and the current of the electric pressure relief device each time it runs is i. Then the amount of electricity that the cooking appliance needs to store before the power is cut off is Q = i * t0 * N.

[0054] According to this application, the required amount of electricity can be determined based on a third preset time, the number of start-stop cycles required by the electric pressure relief device, and the current flowing through the electric pressure relief device during operation. This facilitates the rational design of the circuit structure of the cooking appliance so that it can store sufficient electricity before power failure.

[0055] Optionally, the cover includes a cover body and a rotating frame connected to the cover body. The cover body is provided with a float component and a corresponding engagement position detection device for the rotating frame. The rotating frame is provided with a limiting hole for engaging with the float component. The engagement position detection device is electrically connected to the control unit.

[0056] When the control unit receives the engagement position signal from the engagement position detection device, the position of the float component is aligned with the position of the limiting hole;

[0057] When the air pressure inside the cooking cavity is greater than the safe air pressure threshold, the float component is located in the limiting hole.

[0058] 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.

[0059] Optionally, the rotating frame includes a frame and a connecting beam located inside the frame, the limiting hole is provided at the intersection of the connecting beam or two connecting beams, and the cover is provided with a drive motor electrically connected to the control unit;

[0060] 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.

[0061] According to this application, if the rotating frame is not rotated to the desired position in the direction that allows the fastener to move to the fastening position, 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.

[0062] Optionally, the cover is provided with a disengagement position detection device corresponding to the rotating frame, and the disengagement position detection device is electrically connected to the control unit; the rotating frame includes a frame, a connecting crossbeam, a first connecting longitudinal beam, and a second connecting longitudinal beam, the first connecting longitudinal beam and the second connecting longitudinal beam being arranged at intervals and each intersecting the connecting crossbeam, the connecting crossbeam, the first connecting longitudinal beam, the second connecting longitudinal beam, and the frame forming a first clearance gap and a second clearance gap, the first clearance gap and the second clearance gap being located on both sides of the connecting crossbeam, and the cover is provided with a steam valve and a circuit board receiving structure.

[0063] 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.

[0064] 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.

[0065] 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.

[0066] Optionally, the cover is provided with a disengagement position detection device corresponding to the rotating frame, and the disengagement position detection device is electrically connected to the control unit;

[0067] 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.

[0068] When the control unit receives the engagement position signal, the transmission boss engages with the lid latch to prevent the lid from being opened;

[0069] 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.

[0070] 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.

[0071] A second aspect of this application provides a computer-readable storage medium storing a computer program that, when executed, implements the above-described method for controlling a cooking appliance.

[0072] According to the computer-readable storage medium of the second aspect of this application, a computer program can be stored so that, when executed, the above-described control method for a cooking appliance can be implemented. When the cooking appliance is in use, upon detecting a power failure signal and determining that the temperature inside the cooking cavity of the appliance is greater than a preset temperature, the electric pressure relief device is controlled to start and stop N times, thereby switching the cooking cavity on and off with atmospheric pressure N times, thus reducing the pressure inside the cooking cavity and improving the safety of the cooking appliance.

[0073] A third aspect of this application provides a cooking appliance, the cooking appliance comprising:

[0074] The pot body includes a pot inner for containing food ingredients;

[0075] A lid, which is detachably disposed on the pot body to form a cooking cavity between the lid and the inner pot, and the lid is provided with a steam passage for communicating with the cooking cavity;

[0076] An electric pressure relief device is disposed on the cover, and the electric pressure relief device has an open state for opening the steam passage and a closed state for closing the steam passage;

[0077] A cooking cavity detection device is used to detect the instantaneous temperature or instantaneous air pressure inside the cooking cavity;

[0078] Energy storage device, the energy storage device being electrically connected to the electric pressure relief device; and

[0079] The control unit, electrically connected to the cooking cavity detection device, the electric pressure relief device, and the energy storage device, is configured to:

[0080] After detecting a power failure signal, the energy storage device is controlled to supply power to the electric pressure relief device (120), and the pressure relief device is controlled to switch between open and closed states according to the instantaneous temperature or instantaneous gas in the cooking space detected by the cooking cavity detection device.

[0081] When no power failure signal is detected, the system controls the charging of the energy storage device.

[0082] According to the cooking appliance of the third aspect of this application, in the power-off state, the control unit can control the pressure relief device to repeatedly switch between the open and closed states based on the real-time temperature or real-time air pressure detected by the air pressure detection device, so as to relieve pressure in the cooking cavity, thereby improving the safety of the cooking appliance in the power-off state.

[0083] Optionally, the cooking appliance includes a control circuit board with the control unit, the control circuit board being electrically connected to the electric pressure relief device, and the control circuit board including the energy storage device; or

[0084] The cooking appliance includes a control circuit board and a battery storage device, wherein the control circuit board is electrically connected to the electric pressure relief device and the battery storage device.

[0085] According to this application, the cooking appliance can utilize the built-in energy storage device of the control circuit board or a separately provided energy storage device to power the control circuit board and the electric pressure relief device in the event of a power outage.

[0086] Optionally, the cooking appliance includes a drive motor, a rotating frame, and a fastening element. The rotating frame is rotatably mounted on the cover. The rotating frame is connected to the drive motor and can be driven by the drive motor to rotate. The fastening element is connected to the rotating frame and can be driven by the rotating frame to move between a fastened position and a disengaged position.

[0087] 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.

[0088] 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.

[0089] According to this application, by providing a manual part or manual element, the rotating frame can be driven to rotate manually, thereby enabling the fastening element to fasten or disengage the lid and the inner pot.

[0090] 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.

[0091] 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.

[0092] 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.

[0093] 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.

[0094] The position detection device is arranged correspondingly to the rotating frame to detect the position signal of the rotating frame.

[0095] 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.

[0096] Optionally, the rotating frame includes a limiting hole;

[0097] 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.

[0098] 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.

[0099] Optionally, the cover includes a cover body, the cover body being provided with a float component; the rotating frame is connected to the cover body and constructed as a frame structure, the rotating frame being provided with a limiting hole for engaging with the float component; when the cover locking and opening assembly is in the latching 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.

[0100] 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.

[0101] 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;

[0102] When the control unit does not receive the engagement position signal and / or receives the abnormality flag signal, the position of the float component is offset from the position of the limiting hole.

[0103] 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.

[0104] 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.

[0105] 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.

[0106] 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.

[0107] 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.

[0108] 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.

[0109] 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

[0110] 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,

[0111] Figure 1 A cross-sectional view of a pressure cooking appliance according to a preferred embodiment of this application;

[0112] Figure 2 An exploded view of a pressure cooking appliance according to a preferred embodiment of this application;

[0113] Figure 3 A perspective view of a pressure cooking appliance without a lid according to a preferred embodiment of this application;

[0114] Figure 4 for Figure 3 A cross-sectional view of the lid of a pressure cooking appliance, excluding the top cover;

[0115] Figure 5 for Figure 3 A schematic diagram of the rotating frame in the diagram;

[0116] Figure 6 for Figure 3 A top view of a pressure cooking appliance without the lid shown;

[0117] Figure 7 for Figure 3 Another top view of a pressure cooking appliance without the lid is shown;

[0118] Figure 8 for Figure 3 A top view of the assembly of the transmission connector and the drive motor in the middle;

[0119] Figure 9 for Figure 8 The cross-sectional view of the assembly of the transmission connector and the drive motor shown; and

[0120] Figure 10 This is a flowchart of a control method for a cooking appliance according to a preferred embodiment of this application.

[0121] Explanation of reference numerals in the attached figures:

[0122] 100: Pot body 101: Inner pot

[0123] 102: Lid opening torsion spring; 104: Insulation cover

[0124] 110: Cover body; 110a: Steam passage

[0125] 110b: Steam hole; 110c: Guide surface

[0126] 111: Cover 111a1: First receiving cavity

[0127] 111a2: Second receiving cavity; 112: Liner

[0128] 113: Inner cover; 1131: Inner cover sealing ring

[0129] 114: Steam valve; 116: Control circuit board

[0130] 117: Cover body; 120: Electric pressure relief device.

[0131] 121: Pressure ball; 122: Pressure relief drive component

[0132] 123: Top rod; 130: Cover locking and opening assembly.

[0133] 131: Fastener; 132: Rotating bracket

[0134] 132a: Guide hole; 132b: Limiting hole

[0135] 132c: Trigger part; 132d: Transmission boss

[0136] 132e: Transmission hole; 132g: First clearance gap

[0137] 132h: Frame; 132i: Connecting beam

[0138] 132j: Connecting crossbeam; 132k: First connecting longitudinal beam

[0139] 132m: Second connecting longitudinal beam; 132n: Second clearance gap

[0140] 132p: Clearance groove; 132r: Intersection section

[0141] 133: Transmission connector 133a: First end

[0142] 133a1: Limiting boss; 133b: Second end

[0143] 133c: Connecting shaft; 134: Drive motor

[0144] 134a: Motor shaft; 134b: Limiting recess.

[0145] 135: Force transmission component; 136: Float component

[0146] 137: Guide connector; 140: Position detection device

[0147] 141: Engagement position detection device; 142: Disengagement position detection device

[0148] 158: Battery storage component; 160: Cover latch.

[0149] P1: First extreme position P2: Second extreme position

[0150] AX: Rotation axis; AX1: First axis

[0151] AX2: Second axis; R1: First direction of rotation

[0152] R2: Second rotation direction; D1: Forward / backward direction.

[0153] D2: Left / Right direction; D3: Height direction Detailed Implementation

[0154] 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.

[0155] 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.

[0156] 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.

[0157] 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.

[0158] 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.

[0159] 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.

[0160] 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 cooking cavity detection device, a control unit, and a power storage device 158.

[0161] 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.

[0162] The cooker body 100 includes a pot 101, a heating device (not shown), a control unit, and a pressure 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 device can be configured as a heating plate, heating coil, or other heating device. The heating device 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 cooking cavity detection device, also referred to as a cooking cavity environment 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 cooking cavity detection device can be a temperature detection device or a pressure detection device. The temperature detected by the temperature sensing device needs to be calculated, converted, or looked up in a table to determine the gas pressure value. The gas pressure sensing device can directly detect the gas pressure value. The temperature sensing device can include a bottom temperature sensing device and a top temperature sensing device. The bottom temperature sensing device can be located at the bottom or side of the pot body. The bottom temperature sensing device is used to directly or indirectly detect the temperature at the bottom of the cooking space. The top temperature sensing device, for example, is located on the lid and is used to detect the temperature at the top of the cooking space. Both the heating element and the temperature sensing device are electrically connected to the control unit. The temperature sensing device feeds back the sensed temperature information to the control unit, allowing the control unit to achieve more precise control over components such as the heating element based on the temperature information. The control unit can determine the instantaneous gas pressure based on the received temperature information using methods such as looking up a table, thereby converting the instantaneous temperature into gas pressure.

[0163] 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.

[0164] 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.

[0165] 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 and a second receiving cavity 111a2 are 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. The second receiving cavity 111a2 may accommodate a battery storage device 158.

[0166] In another example, not shown, a first receiving cavity 111a1 is formed between the cover body 111a and the panel 111b. The first receiving cavity 111a1 can accommodate the control circuit board 116 and the energy storage device 158. The energy storage device 158 is, for example, integrated into the control circuit board 116.

[0167] See Figures 2 to 4For 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.

[0168] 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. A temperature detection device is used. 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 detected by the temperature detection device within the cooking space. A power storage device 158 is electrically connected to the control unit and the electric pressure relief device 120. The power storage device 158 stores electricity when the cooking appliance is connected to mains power and can supply power to the control unit and the electric pressure relief device 120 when the cooking appliance is disconnected from mains power.

[0169] According to the pressure cooking appliance of this application, the control unit can control the electric pressure relief device 120 to switch between open and closed states based on the temperature detected by the temperature detection device in the power-on and power-off states, 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 improving the user experience.

[0170] 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.

[0171] 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.

[0172] See Figures 4 to 7 Optionally, 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.

[0173] 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.

[0174] 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.

[0175] 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.

[0176] 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.

[0177] 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.

[0178] Optionally, the energy storage device 158 is a capacitor. This capacitor can be a capacitor originally integrated into the circuit structure or control circuit board 116, or it can be a separately installed capacitor.

[0179] Optionally, the energy storage device 158 is a battery.

[0180] To reduce heat loss during cooking, the pot body 100 includes a heat insulation cover 104, such as... Figure 2 As 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.

[0181] See Figure 2For example, with the lid 110 closed on the pot body 100, a cooking space is formed between the inner pot 101 and the inner lid 113. The 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 fastening element 131. The fastening element 131 may also be referred to as a hook, latch, or fastener. 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.

[0182] 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.

[0183] It is understandable that the drive motor 134 consumes a significant amount of electrical energy during the movement of the fastening member 131. In the power-off state, the energy stored in the battery 158 is sufficient to meet the pressure relief requirements of the electric pressure relief device 120. If the battery 158 is empty or insufficient to power the drive motor 134 after the electric pressure relief device 120 has completed pressure relief, the drive motor 134 will not operate.

[0184] 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.

[0185] 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.

[0186] 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.

[0187] See Figure 3 , Figures 6 to 8Furthermore, the cover-opening assembly 130 may also include a transmission connector 133. The transmission connector 133 has opposite first ends 133a and second ends 133b. The first end 133a is rotatably connected to the cover 110 about a second axis AX2. The first end 133a is connected to the motor shaft 134a of the drive motor 134 to rotate synchronously with the motor shaft 134a. The second end 133b is movably connected to the rotating frame 132. The second axis AX2 is parallel to the first axis AX1. During the rotation of the motor shaft 134a of the drive motor 134, the transmission connector 133 rotates in the same direction as the motor shaft 134a of the drive motor 134. During the rotation of the motor shaft 134a of the drive motor 134, the rotation direction of the transmission connector 133 is opposite to the rotation direction of the rotating frame 132. Figure 6 As shown, the motor shaft 134a has a first rotation direction R1 and a second rotation direction R2. The first rotation direction R1 and the second rotation direction R2 are opposite. The first rotation direction R1 can be understood as counterclockwise. Correspondingly, the second rotation direction R2 can be understood as clockwise. During the rotation of the transmission connector 133 along the motor shaft 134a in the first rotation direction R1, the rotating frame 132 rotates in the second rotation direction R2, which is opposite to the first rotation direction R1, causing the fastening member 131 to move towards the fastening position. During the rotation of the transmission connector 133 along the motor shaft 134a in the second rotation direction R2, the rotating frame 132 rotates in the first rotation direction R1, causing the fastening member 131 to move towards the disengagement position.

[0188] 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.

[0189] 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.

[0190] 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 manipulating the force transmission member 135, thereby disengaging the inner lid 113 from the pot liner 101. In the event of a power outage, if the electrical energy stored in the energy storage device 158 is sufficient to power the electric pressure relief device 120 for pressure relief, but insufficient to drive the motor 134, the user can adjust the fastening member 131 to the unlocked position by moving the force transmission member 135, thereby unlocking the inner cover 113 from the pot liner 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 can be referred to as a lever or actuating member.

[0191] 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.

[0192] 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.

[0193] 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.

[0194] 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.

[0195] 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.

[0196] 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.

[0197] 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.

[0198] 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.

[0199] 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.

[0200] 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.

[0201] 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.

[0202] 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.

[0203] 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.

[0204] 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.

[0205] 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.

[0206] 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.

[0207] 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.

[0208] 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.

[0209] like Figure 10 As shown, an embodiment of this application provides a control method for a cooking appliance. This control method is used for the cooking appliance and can be executed by a control unit. The cooking appliance is an automatic or semi-automatic electrical device, including a rice cooker, an electric pressure cooker, or an electric pressure rice cooker, etc. In the embodiments of this application, the cooking appliance is particularly an electric pressure rice cooker or an electric pressure cooker. The cooking appliance includes a control unit, a pot body 100, and a lid 110. The control unit has preset parameter values ​​such as a safe pressure threshold, a first pressure threshold, and a second pressure threshold. The safe pressure threshold, the first pressure threshold, and the second pressure threshold increase sequentially. The pot body 100 has a pot inner 101. The lid 110 is closably connected to the pot body 100. When the lid 110 is closed on the pot body 100, a cooking cavity is formed between the lid 110 and the pot inner 101. The lid 110 is provided with a steam channel 110a communicating with the cooking cavity and an electric pressure relief device 120 corresponding to the steam channel 110a. The electric pressure relief device 120 is electrically connected to the control unit.

[0210] Methods for controlling cooking appliances may include:

[0211] Check for power outage signals.

[0212] After detecting a power failure signal, determine the instantaneous gas pressure inside the cooking cavity of the cooking appliance;

[0213] Determine the required number of start-stop cycles for the electric pressure relief device 120 based on the real-time air pressure.

[0214] The start / stop status of the electric pressure relief device 120 is controlled according to the number of start / stop cycles.

[0215] The method by which the control unit determines the number of times the electric pressure relief device 120 is started and stopped based on the real-time air pressure includes:

[0216] Compare the instantaneous air pressure with the safe air pressure threshold, the first air pressure threshold, and the second air pressure threshold, respectively, and perform the following steps based on the comparison results:

[0217] When the instantaneous air pressure is not greater than the safe air pressure threshold, the number of times the electric pressure relief device 120 is started and stopped is determined to be 0.

[0218] When the instantaneous air pressure is greater than the safe air pressure threshold but not greater than the first air pressure threshold, the number of times the electric pressure relief device 120 is started and stopped is determined to be at least N1 times, where N1 is a positive integer and N1≥1.

[0219] When the instantaneous air pressure is greater than the first air pressure threshold and not greater than the second air pressure threshold, the number of times the electric pressure relief device 120 is started and stopped is determined to be at least N2 times, where N2 is a positive integer and N2 > N1.

[0220] According to the control method of the cooking appliance in the embodiments of this application, after detecting a power failure signal, the number of times the electric pressure relief device 120 is started and stopped is determined based on the instantaneous air pressure in the cooking cavity, and the start and stop status of the electric pressure relief device 120 is controlled according to the number of start and stop times. If the instantaneous air pressure is not greater than the safe air pressure threshold, there is no need to control the start and stop of the electric pressure relief device 120. If the instantaneous air pressure exceeds the safe air pressure threshold, the number of times the electric pressure relief device 120 is started and stopped is controlled according to the air pressure range in which the instantaneous air pressure is located, thereby reducing the pressure in the cooking cavity. Compared with the related technology of directly releasing pressure after a power failure, this application can automatically release pressure through electronic control based on the instantaneous air pressure in the power failure state, greatly reducing the danger of pressure release of the cooking appliance in the power failure state, thereby improving the safety of the cooking appliance.

[0221] For example, the safe air pressure threshold is not less than 0 Pa. And the safe air pressure threshold is not greater than 4 kPa. Preferably, the safe air pressure threshold is 4 kPa. The first air pressure threshold can be from 4 kPa to 30 kPa. Preferably, the first air pressure threshold is 30 kPa. The second air pressure threshold can be from 30 kPa to 50 kPa. Preferably, the second air pressure threshold is 50 kPa.

[0222] According to this application, the range of the safe air pressure threshold can be set from 4 kPa to 0 kPa, the range of the first air pressure threshold can be set from 30 kPa to 4 kPa, and the range of the second air pressure threshold can be set from 50 kPa to 30 kPa.

[0223] For example, the safe air pressure threshold is not less than 0 Pa, and not greater than 20 kPa. The first air pressure threshold can be 25 kPa to 35 kPa. Preferably, the first air pressure threshold is 30 kPa. The second air pressure threshold can be 45 kPa to 55 kPa. Preferably, the second air pressure threshold is 50 kPa.

[0224] It is understandable that after the gas pressure in the cooking chamber exceeds the second gas pressure threshold, the steam valve 114 will adaptively open and release some of the steam to ensure that the gas pressure in the cooking chamber does not exceed the second gas pressure threshold.

[0225] Optionally, methods for determining the instantaneous gas pressure within the cooking cavity of a cooking appliance include:

[0226] First, detect the instantaneous temperature inside the cooking cavity. Then, determine the instantaneous air pressure based on the detected instantaneous temperature by consulting the instantaneous temperature-instantaneous air pressure correspondence table inside the cooking cavity.

[0227] In the embodiments of this application, the correspondence between instantaneous temperature and instantaneous air pressure within the cooking cavity is shown in the following table:

[0228] Real-time temperature (°C) Real-time air pressure (kPa) 99 0 100 5 101 10 102 15 103 20 104 25 105 30 106 35 107 40 108 45 109 50

[0229] According to this application, instantaneous air pressure is determined by first detecting the instantaneous temperature and then converting the detected instantaneous temperature into instantaneous air pressure.

[0230] Optionally, the cooking appliance is equipped with a pressure detection device that communicates electronically with the control unit. Methods for determining the instantaneous pressure within the cooking cavity of the cooking appliance include:

[0231] The control unit acquires the instantaneous air pressure inside the cooking cavity detected by the air pressure detection device to determine the instantaneous air pressure.

[0232] According to this application, the real-time air pressure inside the cooking cavity can be obtained directly through an air pressure detection device.

[0233] In addition, methods for controlling cooking appliances may also include:

[0234] Upon detecting a power-on signal, the system calculates the power-off time t from receiving the power-off signal to receiving the power-on signal, and determines whether the power-off time t is greater than a first preset time. If t is greater than the first preset time, the system enters standby mode. Here, the power-on signal can be understood as a non-power-off signal. That is, the power-on signal is equivalent to the power-off signal disappearing or not being received.

[0235] According to this application, if power is restored after a power outage time t that is longer than a first preset time, the device enters a standby state so that the user can determine whether to cook.

[0236] Optionally, the starting point for the power outage time t can be after the electric pressure relief device 120 has started and stopped N times, or when a power outage signal is detected.

[0237] Optionally, the standby state can be such that the pressure inside the cooking chamber of the cooking appliance is at or near atmospheric pressure, and the lid 110 of the cooking appliance is in a state that can be safely opened by the user.

[0238] Optionally, in standby mode, the drive motor 134 is controlled to rotate along the second rotation direction R2 until a disengagement signal is detected. That is, in standby mode, the cover 110 is in a state where it can be opened. Alternatively, a start signal indicator element issues a prompt signal.

[0239] According to this application, in standby mode, the drive motor 134 is controlled to rotate in the second rotation direction R2 to disengage and open the lid 110 of the cooking appliance. A warning signal can also be emitted via a signal indicator element to allow the user to promptly detect and address any abnormalities.

[0240] Furthermore, if no disengagement signal is received, the control unit outputs a disengagement alarm message via a control signal prompting element to prompt the user to manually disengage. Disengagement alarm messages may include, for example, audible alarms, visual alarms, audible and visual alarms, and alarm messages displayed on the display component. Audible alarms may include, for example, a buzzer sounding. Visual alarms may include, for example, a flashing warning light. Audible and visual alarms may include a combination of a buzzer sounding and a flashing warning light. Alarm messages displayed on the display component may include displaying a fault code, graphic prompts, etc. Manual disengagement by the user may involve the user rotating the rotating frame 132 by operating the force transmission component 135, thereby moving the fastener 131 to the disengagement position and thus disengaging it. Here, disengagement can be understood as unlocking.

[0241] Optionally, the control method for the cooking appliance further includes: upon detecting a power-on re-energization signal, calculating the power-off time t from receiving the power-off signal to receiving the power-on re-energization signal, and determining whether the power-off time t is greater than a first preset time. If t is less than or equal to the first preset time, then acquiring the cooking function and cooking stage before the power-off signal was detected, and controlling the continued execution of cooking according to the cooking function and cooking stage. The cooking function and cooking stage before the power-off signal can be stored at or after the power-off signal is detected. The cooking function includes functions such as cooking rice, making soup, and making porridge. Taking the rice cooking function as an example, the cooking stage includes a preheating and water absorption stage, a rapid boiling and pressurization stage, a pressure holding and boiling maintenance stage, and a simmering stage.

[0242] According to this application, if power is restored after a power outage time t less than or equal to a first preset time, cooking will automatically continue based on the cooking function and cooking stage before the power outage, without user intervention, which is more convenient and improves the user experience.

[0243] In some embodiments of this application, the first preset time can be 10 minutes.

[0244] According to this application, the first preset time is 10 minutes. This time is not too long. If the power is turned on within 10 minutes, cooking can continue, with less impact on the cooking effect. If the power is turned on after 10 minutes, the device can enter standby mode, allowing the user to choose to abandon cooking or restart cooking.

[0245] In some other embodiments of this application, the first preset time can be any time other than 10 minutes, and can be set according to research data, experience, user needs, etc.

[0246] For example, before controlling the continuation of cooking, it is first determined whether a locking position signal has been received. If no locking position signal is received, the drive motor 134 is controlled to rotate in the first rotation direction R1 (e.g., ...). Figure 6 (As shown) rotate until a locking position signal is received. The locking position signal here can be understood as the locking position signal when the locking member 131 moves to the locking position. When the locking position signal is received, it indicates that the trigger part of the rotating frame 132 abuts against the locking position detection device 141 or the trigger part 132c is within the sensing range of the locking position detection device 141.

[0247] According to this application, if it is determined that no locking position signal has been received before continuing cooking, the lid is first relocked so that cooking can continue with the lid locked, thereby improving the safety of the cooking appliance during the cooking process.

[0248] Furthermore, before determining whether a locking position signal has been received, it is first determined whether the cooking stage includes a cooking pressure exceeding the safe gas pressure threshold, based on the cooking function prior to the power outage signal or the cooking function stored at the time of the power outage. The cooking function prior to the power outage signal or the cooking function stored at the time of the power outage can both be understood as the cooking function selected by the user.

[0249] If the cooking function before the power outage signal or the cooking function stored after the power outage includes a cooking stage where the cooking pressure is greater than the safe pressure threshold, then it is necessary to determine whether a locking position signal has been received.

[0250] If no engagement position signal is received, the drive motor 134 is controlled to rotate in the first rotation direction R1 (e.g., ...). Figure 6 (As shown) Rotate until a locking position signal is received. Alternatively, the start signal indicator element will issue a prompt signal. Or, cooking will stop.

[0251] According to this application, it is first determined whether the cooking function before the power outage includes a cooking stage where the cooking pressure is greater than the safe pressure threshold, i.e., whether pressurization is required during the corresponding cooking function. If such a cooking stage exists, it indicates that the cooking function requires pressurization. Pressurization usually requires locking the lid. Then, it is determined whether a locking position signal is received, i.e., whether the lid is locked in place. If no locking position signal is received, the drive motor 134 is controlled to rotate to lock the lid. This ensures that cooking functions requiring pressurization are performed with the lid locked. Based on whether a locking position signal is received, the control continues to rotate in the first rotation direction until a locking position signal is received, or a signal indicator element is activated, or cooking is stopped. This improves the automation level of the cooking process control, achieving more accurate and safer control of the cooking process, while also increasing the flexibility of the cooking process.

[0252] Furthermore, the control methods may include:

[0253] The prompting element outputs a latching alarm message to prompt the user to manually latch the device.

[0254] The cover 110 is provided with a manual part or manual element that is connected to and can drive the rotation of the rotating frame 132. The warning 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 member 135. Disengagement alarm information includes, for example, audible alarm information, visual alarm information, audible and visual alarm information, and alarm information displayed on the display component. An audible alarm information may be, for example, a buzzer sounding. A visual alarm information may be, for example, a flashing warning light. An audible and visual alarm information may be a combination of a buzzer sounding and a flashing warning light. The alarm information displayed on the display component may include, for example, displaying a fault code, graphic prompts, etc. The cover locking operation is performed manually, for example, by the user operating the force transmission member 135 to rotate the rotating frame 132, thereby moving the fastening member 131 to the fastening position and locking it in place.

[0255] 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.

[0256] Optionally, before controlling the continued cooking process, the drive motor 134 is controlled to rotate in the second rotation direction R2 (e.g., ...). Figure 6 (As shown) Rotate. Here, it's not necessary to detect the engagement position signal. The second rotation direction R2 here is the opposite of the first rotation direction R1 described above.

[0257] According to this application, after power is restored and before cooking continues, the drive motor 134 is controlled to rotate in the second rotation direction R2 to ensure that cooking continues in the locked state.

[0258] For example, after determining that the instantaneous air pressure in the cooking cavity is greater than the safe air pressure threshold, the electric pressure relief device 120 is activated once every second preset time.

[0259] According to this application, the electric pressure relief device 120 is controlled to start and stop intermittently at a second preset time interval.

[0260] Optionally, the second preset time ranges from 0.1s to 1s. Preferably, the second preset time is 0.5s.

[0261] For example, after determining that the instantaneous air pressure in the cooking cavity is greater than the safe air pressure threshold, the electric pressure relief device 120 is controlled to run continuously for a third preset time after each start-up.

[0262] According to this application, the electric pressure relief device 120 is controlled to run continuously for a third preset time after each start-up.

[0263] Optionally, the third preset time ranges from 0.1s to 1s. Preferably, the third preset time is 0.5s.

[0264] Optionally, N1 = 1.

[0265] According to this application, if the instantaneous air pressure is greater than the safe air pressure threshold and the instantaneous air pressure is not greater than the first air pressure threshold, then the number of start-stop cycles required for the electric pressure relief device 120 is determined to be at least 1.

[0266] Optionally, N2 = 2.

[0267] According to this application, if the instantaneous air pressure is greater than the first air pressure threshold and the instantaneous air pressure is not greater than the second air pressure threshold, then the number of start-stop cycles required for the electric pressure relief device is determined to be at least 2.

[0268] Optionally, if the instantaneous air pressure is greater than the safe air pressure threshold, the required number of start-stop cycles for the electric pressure relief device is determined to be at least N. N = N1 or N = N2. The third preset time is t0. The current of the electric pressure relief device during each operation is i. Then, the amount of electricity that the cooking appliance needs to store before the power is cut off is Q = i * t0 * N.

[0269] According to this application, the required amount of electricity can be determined based on a third preset time, the number of start-stop cycles required by the electric pressure relief device, and the current flowing through the electric pressure relief device during operation. This facilitates the rational design of the circuit structure of the cooking appliance so that it can store sufficient electricity before power failure.

[0270] Optionally, upon detecting a power failure signal, the display component is controlled to shut down. The display component includes at least one of a display device such as a digital tube or a display screen.

[0271] According to this application, power consumption can be reduced by turning off the display component, so as to make reasonable use of the electrical energy stored in the energy storage device 158.

[0272] Optionally, the lid 110 of the pressure cooker includes a lid body 117 and a frame-type rotating bracket 132 rotatably connected to the lid body 117. A float member 136 is provided on the lid body 117. A limiting hole 132b is provided on the rotating bracket 132 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. During the process of the electric pressure relief device 120 switching to the off state and the pressure cooker performing the selected cooking function in pressure mode, the float member 136 moves into the limiting hole 132b.

[0273] 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 117. 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.

[0274] Optionally, the rotating frame 132 includes a frame 132h and a connecting beam 132i located inside the frame. A limiting hole 132b is provided on the connecting beam 132i or at the intersection of two connecting beams 132i.

[0275] When the control unit does not receive the engagement position signal, the position of the float component 136 is offset from the position of the limiting hole 132b.

[0276] According to this application, if the rotating frame 132 is not rotated into place, which would allow the fastener to move to the fastening position, the float component 136 is misaligned with the limiting hole 132b, so the float component 136 cannot form an anti-rotation engagement with the rotating frame 132 when it is pressed up in the cooking space.

[0277] Optionally, the rotating frame 132 is rotatable relative to the cover about the first axis AX1. The rotating frame 132 includes a guide hole 132a. The guide hole 132a has a locking end and a disengaging end. The locking end is closer to the first axis AX1 than the disengaging end. The locking member 131 is movably connected to the guide hole 132a via a guide connector 137. In step S3, if a locking position signal is received, it is determined that the guide connector 137 is located at the locking end of the guide hole 132a, and the locking member 131 is in the locking position.

[0278] 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.

[0279] Optionally, the rotating frame 132 is rotatable relative to the cover about the first axis AX1. The rotating frame 132 includes a guide hole 132a. The guide hole 132a has a locking end and a disengaging end. The locking end is closer to the first axis AX1 than the disengaging end. The locking member 131 is movably connected to the guide hole 132a via a guide connector 137. In step S6, if a disengaging position signal is received, it is determined that the guide connector 137 is located at the disengaging end of the guide hole 132a, and the locking member 131 is in the disengaged position.

[0280] 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.

[0281] 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 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 a locking 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 receiving 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.

[0282] 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.

[0283] Optionally, one end of the lid 110 is rotatably connected to the pot body 100, and the other end is detachably connected to the pot body 100 via a lid latch 160. The rotating frame 132 includes a drive boss 132d. When the control unit receives a latching position signal, the drive boss 132d engages with the lid latch 160 to prevent the lid 110 from being opened. When the control unit receives a disengaged position signal, the drive boss 132d disengages from the lid latch 160 to allow the lid 110 to be opened.

[0284] 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.

[0285] According to the control method of the cooking appliance of this application, before the cooking function is started, the electric pressure relief device 120 is not working and is in the open state, and the pressure in the cooking cavity is at atmospheric pressure. When cooking begins, the electric pressure relief device 120 works at a certain cooking stage. The push rod 123 releases the pressure ball 121, which blocks the steam hole 110b, allowing the cooking cavity to be pressurized. When a power failure signal is detected, the electric pressure relief device 120 is intermittently switched on and off N times using the electricity stored in the capacitor in the circuit structure of the cooking appliance or in an additional battery. According to empirical data, the highest pressure in the cooking cavity is generally 50 kPa. When the air pressure in the cooking cavity exceeds 50 kPa, the pressure ball 121 will be pushed open by the excessive air pressure force to release air until the air pressure in the cooking cavity does not exceed 50 kPa. Then, the pressure ball 121 resets and blocks the steam hole 110b again. If the instantaneous air pressure in the cooking cavity is 50 kPa when the power is cut off, the electric pressure relief device 120 needs to be intermittently switched on and off 3 times. This causes the instantaneous air pressure inside the cooking cavity to reach 20 kPa. 20 kPa is considered a safe pressure. However, the user still cannot directly open the lid 110 at this point. Instead, the user observes the markings on the lid 110 and rotates the rotating bracket 132 by moving the force transmission component 135. The rotating bracket 132 then moves the fastening component 131 from the fastened position to the disengaged position. At this point, the user can open the lid 110 of the cooking appliance using the lid-opening button.

[0286] According to the control method of the cooking appliance of this application, before power is cut off, the capacitor on the control circuit board 116 is used as a power storage device 158 to store electricity. During power failure, the control unit is in a low-power state. The control unit automatically times the power failure time t and the start and stop time of the electric pressure relief device 120. If power is restored when the power failure time t is less than or equal to 10 minutes, cooking continues from the cooking stage of the selected cooking function at the time of power failure. If the power failure time t is greater than 10 minutes, the cooking appliance is controlled to return to standby mode.

[0287] According to the control method of the cooking appliance of this application, upon detecting the instant of power failure, the first step is to store the selected cooking function and the cooking stage at the instant of power failure, and to time the power failure duration. Then, based on the detected instantaneous temperature or instantaneous air pressure within the cooking cavity, it is determined whether the cooking cavity is pressurized. If it is pressurized, the pressure is first released by controlling the venting. After power is restored, it is determined whether to continue cooking based on the power failure duration. If cooking continues, then based on the cooking stage stored at the time of power failure, all subsequent cooking stages of the cooking function are executed starting from the stored cooking stage.

[0288] According to the control method of the cooking appliance of this application, when power is restored, the previous cooking function and power outage time are read first. The drive motor 134 rotates forward or backward for a period of time, causing the fastening member 131 to move to the disengaged position, thus achieving automatic unlocking. The power outage time determines whether to continue cooking. If cooking continues, the current cooking function determines whether pressure needs to be applied. If pressure needs to be applied, the drive motor 134 rotates forward or backward for a period of time, causing the fastening member 131 to move to the fastening position, thus achieving automatic lid locking. Simultaneously, the electric pressure relief device 120 operates and switches to the closed state to seal the cooking chamber, allowing cooking to continue.

[0289] The cooking appliance control method according to the embodiments of this application applies to a 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 member 131 linkage mechanism via a transmission connector 133. The fastening member 131 linkage mechanism includes a rotating frame 132 and a fastening member 131. By rotating the drive motor 134 in reverse / forward, the fastening member 131 automatically locks / 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 cut off, the electric pressure relief device 120 resets to the state where the steam passage 110a is open. When the control unit detects a power failure signal, it stores the cooking stage and the power failure time. The electric pressure relief device 120 is intermittently energized more than twice. This can greatly reduce the pressure in the cooking cavity, reduce safety risks, and greatly improve the user experience.

[0290] Upon power restoration, the system first retrieves the cooking function, current cooking stage, and power outage duration before the power failure. It then controls the drive motor 134 to rotate forward for a period to automatically unlock the latch 131. Based on the power outage duration, it determines whether to continue cooking. If continued cooking is desired, it checks the cooking stage before the power failure to determine if pressurization is required. If pressurization is needed, it controls the drive motor 134 to rotate in reverse for a period to automatically lock the latch 131. Simultaneously, it controls the electric pressure relief device 120 to switch to the closed state, blocking the steam passage 110a, to enable pressurization. Then, it continues executing all subsequent cooking stages of the function, starting from the current cooking stage.

[0291] The following description uses the rice cooking function as an example to illustrate the control method of the cooking appliance according to this application.

[0292] Selecting the rice cooking function and pressing the start button reverses the drive motor 134, moving the fastening piece 131 to the fastening position, thus fastening the inner lid 113 to the pot 101. The control unit continuously monitors for power failure. In the top view, this reversal can be understood as counter-clockwise rotation. The cooking functions include a preheating and water absorption stage, a rapid boiling and pressurization stage, a pressure holding and boiling maintenance stage, and a simmering stage.

[0293] (1) Preheating and water absorption stage:

[0294] When the control unit detects a power outage signal, it times the power outage duration and stores the user-selected cooking function and the cooking stage in progress at the time of the power outage. This cooking stage is the preheating and water absorption stage. The electric pressure relief device 120 immediately resets to the open state. When power is restored, if the power outage time is within 10 minutes, the system automatically selects the rice cooking function and starts cooking from the preheating and water absorption stage based on the selected cooking function and the cooking stage in progress at the time of the power outage. If the power outage time exceeds 10 minutes, the system returns to standby mode. The drive motor 134 rotates forward for a period of time, and the fastening piece 131 moves to the disengaged position, thus separating the inner cover 113 from the pot liner 101. In the top view, "forward rotation" can be understood as clockwise rotation.

[0295] (2) Rapid boiling and pressurization stage:

[0296] If a power outage signal is detected before boiling, the control method is the same as that for the preheating and water absorption stage. That is, no pressure relief operation is required after a power outage. After power is restored, it is only necessary to determine whether to continue cooking based on the power outage time. If cooking needs to continue, all subsequent cooking stages of this cooking function will continue from the current cooking stage. If cooking does not need to continue, it will return to standby mode and control the fastener 131 to disengage.

[0297] If a power outage signal is detected after boiling, the power outage time is timed, and the user-selected cooking function and the current cooking stage are stored. Simultaneously, the electric pressure relief device 120 is energized at least twice until the instantaneous temperature inside the cooking chamber is less than or equal to a preset safe temperature. The preset safe temperature corresponds to a safe pressure threshold in a queried temperature-pressure table, for example, 20 kPa. Each energization time of the electric pressure relief device 120 is, for example, 0.5 seconds. Each power-off time of the electric pressure relief device 120 is, for example, 0.5 seconds. When power is restored, if the power outage time is within 10 minutes, the cooking stage after boiling, as per the original cooking function, continues. Specifically, the electric pressure relief device 120 operates to block the steam passage 110a, and the drive motor 134 reverses to move the latching member 131 to the latching position, thereby enabling the continued pressure build-up and rapid boiling / pressurization cooking stages. When power is restored, if the power outage time exceeds 10 minutes, it returns to standby mode. The drive motor 134 rotates forward for a period of time, and the fastener 131 returns to the disengaged position, so that the cover 110 is in a state that can be opened.

[0298] (3) Pressure holding and boiling maintenance stage:

[0299] Upon detecting a power outage signal, the system begins timing the power outage time and stores the cooking function and cooking stage. Simultaneously, the electric pressure relief device 120 is powered on at least twice until the instantaneous temperature inside the cooking chamber is less than or equal to a preset safe temperature. The preset safe temperature corresponds to the safe pressure threshold in a queried temperature-pressure table. Each power-on time of the electric pressure relief device 120 is, for example, 0.5 seconds. Each power-off time of the electric pressure relief device 120 is, for example, 0.5 seconds. When power is restored, if the power outage time is within 10 minutes, cooking continues from the boiling stage of the original cooking function. Specifically, the electric pressure relief device 120 operates to block the steam passage 110a, and the drive motor 134 reverses to move the latching member 131 to the latching position, thereby enabling cooking to continue from the pressure-holding and boiling stage. When power is restored, if the power outage time exceeds 10 minutes, the system returns to standby mode. The drive motor 134 first rotates forward for a period of time, and the latching member 131 returns to the disengaged position, allowing the lid 110 to be opened.

[0300] (4) Cooking rice stage:

[0301] Check the top temperature to see if there is still pressure. If there is no pressure, it is consistent with the preheating and water absorption stage; if there is pressure, it is consistent with the pressure holding and boiling stage.

[0302] Upon detecting a power outage signal, the system begins timing the power outage and stores the cooking function and cooking stage. Simultaneously, it checks whether the instantaneous temperature inside the cooking cavity exceeds the preset safe temperature.

[0303] If the instantaneous temperature inside the cooking cavity exceeds the preset safe temperature, the electric pressure relief device 120 is energized at least twice until the instantaneous temperature inside the cooking cavity is less than or equal to the preset safe temperature. The preset safe temperature corresponds to the safe pressure threshold in a temperature-pressure table. Each energization of the electric pressure relief device 120 is, for example, 0.5 seconds. Each de-energization of the electric pressure relief device 120 is, for example, 0.5 seconds. When energized again, if the de-energization time is within 10 minutes, cooking continues in the pressure-holding and boiling-maintaining phase. Specifically, the electric pressure relief device 120 operates to block the steam passage 110a, and the drive motor 134 reverses to move the latching member 131 to the latching position, thereby enabling the pressure-holding and boiling-maintaining cooking phases to continue. When energized again, if the de-energization time exceeds 10 minutes, it returns to standby mode. The drive motor 134 first rotates forward for a period of time, and the latching member 131 returns to the disengaged position, allowing the lid 110 to be opened.

[0304] If the instantaneous temperature inside the cooking cavity is less than or equal to the preset safe temperature, the electric pressure relief device 120 immediately resets to the open state. When power is restored, if the power outage time is within 10 minutes, the rice cooking function is automatically selected based on the cooking function and cooking stage, and cooking begins from the rice simmering stage. If the power outage time exceeds 10 minutes, it returns to standby mode, and the drive motor 134 rotates forward for a period of time, causing the fastening piece 131 to move to the disengaged position, thereby separating the inner cover 113 from the pot liner 101. In the top view, "forward rotation" can be understood as clockwise rotation.

[0305] After completing the cooking stage, the cooking appliance enters the heat preservation stage. During the heat preservation stage, there is no pressure inside the cooking cavity. Upon detecting a power failure signal, the timer for the power failure begins, and simultaneously, the electric pressure relief device 120 is directly reset to the open state. When power is restored, if the power failure time is within 10 minutes, the heat preservation stage continues. If the power failure time exceeds 10 minutes, it returns to standby mode, the drive motor 134 rotates forward for a period of time, and the fastening piece 131 moves to the disengaged position, thereby separating the inner lid 113 from the pot liner 101.

[0306] This application provides a computer-readable storage medium. The computer-readable storage medium can be integrated into a control unit or can be a memory independent of the control unit. The computer-readable storage medium stores a computer program, which, when executed, implements the aforementioned control method for the cooking appliance.

[0307] This application also provides a computer-readable storage medium storing a computer program that, when executed, implements the above-described method for controlling cooking appliances.

[0308] According to the computer-readable storage medium of the second aspect of this application, a computer program can be stored so that, when executed, the above-described control method for a cooking appliance can be implemented. When the cooking appliance is in use, upon detecting a power failure signal and determining that the instantaneous temperature inside the cooking cavity of the cooking appliance is greater than a preset safe temperature, the electric pressure relief device 120 is controlled to switch the cooking cavity on and off with atmospheric pressure N times, thereby reducing the pressure inside the cooking cavity and improving the safety of the cooking appliance.

[0309] Unless otherwise defined, the technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art. The terminology used herein is for descriptive purposes only and is not intended to limit the scope of this application. Terms such as “setup” appearing herein can refer to either a component being directly attached to another component or a component being attached to another component via an intermediary. A feature described in one embodiment herein may be applied, alone or in combination with other features, to another embodiment, unless that feature is not applicable in that other embodiment or is otherwise stated.

[0310] This application has been described through the above embodiments; however, it should be understood that the above embodiments are for illustrative purposes only and are not intended to limit this application to the described embodiments. Those skilled in the art will understand that many more variations and modifications can be made based on the teachings of this application, and all such variations and modifications fall within the scope of protection claimed in this application.

Claims

1. A control method of a cooking appliance, characterized by, The cooking utensil comprises: a control unit, in which a safety air pressure threshold value, a first air pressure threshold value and a second air pressure threshold value are preset, and the safety air pressure threshold value, the first air pressure threshold value and the second air pressure threshold value increase in turn; a pot body (100) provided with a pot liner (101); and a cover body (110) which is connected to the pot body (100) in an openable and closable manner, and when the cover body (110) is closed on the pot body (100), a cooking cavity is formed between the cover body (110) and the pot liner (101), the cover body (110) is provided with a steam passage (110a) which communicates with the cooking cavity and an electric pressure relief device (120) which is arranged correspondingly to the steam passage (110a), and the electric pressure relief device (120) is electrically connected to the control unit, The control method of the cooking utensil comprises: detecting whether there is a power-off signal; after detecting the power-off signal, determining the instant air pressure in the cooking cavity of the cooking utensil; the control unit determines the start-stop times of the electric pressure relief device according to the instant air pressure, and the step comprises: when the instant air pressure is not greater than the safety air pressure threshold value, the start-stop times of the electric pressure relief device (120) are determined as 0 times; when the instant air pressure is greater than the safety air pressure threshold value and not greater than the first air pressure threshold value, the start-stop times of the electric pressure relief device (120) are determined as at least N1 times, N1 is a positive integer, and N1≥1; when the instant air pressure is greater than the first air pressure threshold value and not greater than the second air pressure threshold value, the start-stop times of the electric pressure relief device (120) are determined as at least N2 times, N2 is a positive integer, and N2>N1.

2. The control method of the cooking utensil according to claim 1, wherein the method for determining the instant air pressure in the cooking cavity of the cooking utensil comprises: first detecting the instant temperature in the cooking cavity, and then determining the instant air pressure according to the detected instant temperature by querying an instant temperature-instant air pressure corresponding relationship table in the cooking cavity.

3. The control method of the cooking utensil according to claim 1, wherein an air pressure detection device which is in electronic communication with the control unit is arranged on the cooking utensil, the method for determining the instant air pressure in the cooking cavity of the cooking utensil comprises: the control unit acquires the instant air pressure in the cooking cavity detected by the air pressure detection device. 4.The control method of a cooking appliance according to claim 1, characterized in that, The control method of the cooking utensil further comprises: when a re-power-on signal is detected, calculating the power-off time t from the power-off signal to the re-power-on signal, and determining whether the power-off time t is greater than a first preset time, if t is greater than the first preset time, the control enters a standby state.

5. The control method of the cooking utensil according to claim 1, wherein The control method of the cooking utensil further comprises: when a re-power-on signal is detected, calculating the power-off time t from the power-off signal to the re-power-on signal, and determining whether the power-off time t is greater than a first preset time, If t is less than or equal to the first preset time, the cooking function selected before the power-off signal is detected and the cooking stage being performed are obtained, and the cooking is continued from the cooking stage being performed before the power-off signal according to the cooking function selected before the power-off signal.

6. The control method of the cooking appliance according to claim 5, wherein, before the control of the continued cooking, it is determined whether the cooking function selected before the power-off signal contains a cooking stage with a cooking pressure greater than the safety pressure threshold according to the cooking function selected before the power-off signal, if the cooking function selected before the power-off signal contains a cooking stage with a cooking pressure greater than the safety pressure threshold, it is determined whether the latching position signal is received, if the latching position signal is not received, the driving motor (134) is controlled to rotate in the first rotation direction (R1) until the latching position signal is received, or, a start signal prompting element emits a prompt signal, or, the cooking is stopped.

7. The control method of the cooking appliance according to claim 4, wherein, in the standby state, the driving motor (134) is controlled to rotate in the second rotation direction (R2) until the disengaging signal is detected, or, a start signal prompting element emits a prompt signal. 8.The control method of a cooking appliance according to claim 1, characterized in that, the safety pressure threshold ranges from 4KPa to 0KPa, and / or, the first pressure threshold ranges from 30KPa to 4KPa, and / or, the second pressure threshold ranges from 50KPa to 30KPa.

9. The control method of the cooking appliance according to claim 1, wherein, after it is determined that the instant pressure in the cooking cavity is greater than the safety pressure threshold, the electric pressure relief device is controlled to be started once every second preset time.

10. The control method of the cooking appliance according to claim 1, wherein, after it is determined that the instant pressure in the cooking cavity is greater than the safety pressure threshold, the electric pressure relief device is controlled to run for a third preset time after each start.

11. The control method of the cooking appliance according to claim 1, wherein, N1 = 1, and / or N2 = 2.

12. The control method of the cooking appliance according to claim 10, wherein, if the instant pressure is greater than the safety pressure threshold, the number of starts and stops required by the electric pressure relief device is determined to be at least N times, N = N1 or N = N2, the third preset time is t0, the current of the electric pressure relief device is i, and the amount of electricity Q required to be stored by the cooking appliance before power-off is i * t0 * N.

13. The control method of the cooking appliance according to any one of claims 1 to 12, wherein, The cover (110) includes a cover body (117) and a rotating frame (132) connected to the cover body (117). The cover body (117) is provided with a float component (136) and a fastening position detection device (141) corresponding to the rotating frame (132). The rotating frame (132) is provided with a limiting hole (132b) for engaging with the float component (136). The fastening position detection device (141) is electrically connected to the control unit. When the control unit receives the engagement position signal of the engagement position detection device (141), the position of the float component (136) is aligned with the position of the limiting hole (132b); When the air pressure inside the cooking cavity is greater than the safe air pressure threshold, the float component (136) is located in the limiting hole (132b).

14. The method for controlling a cooking appliance according to claim 13, 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). The cover (110) is provided with a drive motor (134) electrically connected to the control unit. 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).

15. The method for controlling a cooking appliance according to claim 13, characterized in that, The cover (110) is provided with a disengagement position detection device (142) corresponding to the rotating frame (132), and the disengagement position detection device (142) is electrically connected to the control unit; 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 is connected to the connecting crossbeam. (132j) intersects, and the connecting crossbeam (132j), the first connecting longitudinal beam (132k), the second connecting longitudinal beam (132m), and the frame (132h) enclose and 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).

16. The method for controlling a cooking appliance according to claim 13, characterized in that, The cover (110) is provided with a disengagement position detection device (142) corresponding to the rotating frame (132), and the disengagement position detection device (142) is electrically connected to the control unit; 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.

17. A computer-readable storage medium, characterized in that, The computer-readable storage medium stores a computer program that, when executed, implements the control method for a cooking appliance according to any one of claims 1 to 16.

18. A cooking appliance characterized by, The cooking appliance includes: The pot body (100) includes a pot inner (101) for containing food ingredients; A lid (110) is provided on the pot body (100) in an openable and closable manner to form a cooking cavity between the lid (110) and the inner pot (101), and a steam passage (110a) is provided on the lid (110) for communicating with the cooking cavity. An electric pressure relief device (120) is provided on the cover (110), and 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); A cooking cavity detection device is used to detect the instantaneous temperature or instantaneous air pressure inside the cooking cavity; A storage device (158) electrically connected to the electrically operated pressure relief device (120); and A control unit, electrically connected to the cooking cavity detection device, the electric pressure relief device (120), and the energy storage device (158), is configured to: After detecting a power failure signal, the energy storage device (158) is controlled to supply power to the electric pressure relief device (120), and the electric pressure relief device (120) is controlled to switch between an open state and a closed state according to the instantaneous temperature or instantaneous air pressure in the cooking cavity detected by the cooking cavity detection device. When no power failure signal is detected, the system controls the charging of the energy storage device (158).

19. The cooking utensil according to claim 18, characterized in that, The cooking appliance includes a control circuit board (116) equipped with the control unit, the control circuit board (116) being electrically connected to the electric pressure relief device (120), and the control circuit board (116) including the energy storage device (158); or The cooking appliance includes a control circuit board (116) and an energy storage device (158), the control circuit board (116) being electrically connected to the electric pressure relief device (120) and the energy storage device (158).

20. The cooking utensil according to claim 18, characterized in that, The cooking appliance includes a drive motor (134), a rotating frame (132), and a fastening element (131). The 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. 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.

21. The cooking appliance of claim 20, wherein, 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.

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