Cooking utensil

Abstract

The invention provides a cooking utensil. The cooking utensil comprises a pot body, a cover body, a communicating port opening and closing assembly, a driving assembly and a pressure limiting device. The communicating port opening and closing assembly is connected to the cover body and can move between an opening position and a blocking position relative to the communicating port. The pressure limiting device is arranged between the driving assembly and the communication port opening and closing assembly so as to transmit the driving force of the driving assembly to the communication port opening and closing assembly, and therefore the communication port opening and closing assembly is driven to move between the opening position and the blocking position. When the pressure in the cooking space reaches a preset value, the communication opening opening and closing assembly can overcome the driving force to move to the open position under the action of the pressure, so that the pressure in the cooking space is not higher than the preset value. The pressure in the cooking space is controlled within a certain pressure range through the pressure limiting device, safe pressure relief can be achieved, and the pressure in the cooking space is stabilized within a preset range.

Description

Technical Field

[0001] The present application relates to the technical field of cooking appliances. Background Art

[0002] There is a type of cooking appliance that changes the pressure value in the cooking space during the cooking stage or the heat preservation stage to improve the cooking effect in order to enhance the taste. However, when the program crashes or the motor is damaged, the exhaust port may not be able to open and the pressure cannot be released, which may cause safety hazards.

[0003] Therefore, it is necessary to provide a cooking appliance to at least partially solve the above problems. Summary of the invention

[0004] A series of simplified concepts are introduced in the Summary of the Invention section, which will be further described in detail in the Detailed Description of the Invention section. The Summary of the Invention section of this application does not mean to attempt to define the key features and essential technical features of the claimed technical solution, nor does it mean to attempt to determine the scope of protection of the claimed technical solution.

[0005] In order to at least partially solve the above problems, the present application provides a cooking appliance, comprising:

[0006] The pot body includes a pot body for containing food; and

[0007] A cover body, the cover body can be opened and closed on the pot body to form a cooking space between the cover body and the pot body, and the cover body is provided with a connecting port for connecting the cooking space with the outside;

[0008] a communication port opening and closing assembly, the communication port opening and closing assembly being connected to the cover body and movable between an open position and a blocked position relative to the communication port, and being used for opening or blocking the communication port, thereby realizing opening or closing the cooking space;

[0009] A driving component, used to provide driving force;

[0010] A pressure limiting device is provided between the driving assembly and the communication port opening and closing assembly to transmit the driving force of the driving assembly to the communication port opening and closing assembly, thereby driving the communication port opening and closing assembly to move between the open position and the blocked position, wherein:

[0011] When the pressure in the cooking space reaches a preset value, the communication port opening and closing assembly can overcome the driving force and move to an open position under the action of the pressure, so that the pressure in the cooking space is not higher than the preset value.

[0012] According to the present application, a pressure limiting device is provided between the connecting port opening and closing component and the driving component. When the pressure in the cooking space is within a certain pressure range, the driving force of the driving component can be transmitted to the connecting port opening and closing component through the pressure limiting device, so that the connecting port is opened or blocked to achieve different air pressure states in the cooking space; when the pressure in the cooking space reaches a preset value, the connecting port opening and closing component is allowed to open the connecting port under the drive of the cooking space pressure. By controlling the pressure in the cooking space within a certain pressure range through the pressure limiting device, safe pressure relief can be achieved, so that the pressure in the cooking space is stabilized within a preset range.

[0013] Optionally, the pressure limiting device comprises:

[0014] A base member and a movable member, wherein the base member and the movable member can move relative to each other between an initial position and a pressure relief position;

[0015] The base member is connected to the communication port opening and closing assembly, and the movable member is connected to the driving assembly.

[0016] According to the present application, the base member and the movable member are relatively movable so that the communication port opening and closing assembly can move relative to the driving assembly under preset conditions to open the communication port.

[0017] Optionally, the driving assembly drives the pressure limiting device in the initial position to move, thereby driving the communication port opening and closing assembly to move between an open position and a blocked position.

[0018] According to the present application, the driving force is transmitted to the communication port opening and closing assembly through the pressure limiting device, so that the pressure in the cooking space can be accurately adjusted during the cooking process.

[0019] Optionally, when the pressure in the cooking space reaches a preset value, the communication port opening and closing assembly can move toward the open position under the action of the pressure, so that the base member can move toward the pressure relief position relative to the movable member.

[0020] According to the present application, through the design of the pressure limiting device, when the preset pressure is reached, the connecting port opening and closing assembly is allowed to be opened by the pressure in the cooking space, so that the excessive internal air pressure can be safely released, avoiding damage to the cooking utensils or other safety problems.

[0021] Optionally, a connecting rod is also included, which is constructed to be rotatable relative to the cover body around a first axis, and the connecting rod includes a first end and a second end of the connecting rod that are opposite along the length direction of the connecting rod, the first end of the connecting rod is connected to the connecting port opening and closing assembly, and the second end of the connecting rod is connected to the pressure limiting device.

[0022] According to the present application, the position of the connecting port opening and closing assembly can be adjusted by the rotation of the connecting rod, and the opening and closing of the connecting port can be controlled by changing the angle of the connecting rod, thereby adjusting the ventilation state in the cooking space. By introducing the connecting rod, the flexibility and controllability of the cooking appliance can be increased.

[0023] Optionally, the base member is constructed as a hollow tubular structure, and the movable member is movably sleeved on the base member along the axial direction of the movable member.

[0024] According to the present application, the movable part can realize smooth movement in the axial direction within the base part, with high movement accuracy, strong stability, and low vibration and noise.

[0025] Optionally, the movable member comprises a movable member first end and a movable member second end which are arranged oppositely along the axial direction of the movable member, and the movable member first end extends outside the base member and is connected to the driving assembly.

[0026] According to the present application, the first end of the movable member extends out of the base member so as to be better connected to the driving assembly.

[0027] Optionally, the first end of the movable member is provided with a valve core flange protruding outwardly in the radial direction, and the base member is provided with a valve body flange protruding inwardly in the radial direction, and the valve body flange is closer to the drive assembly than the valve core flange; wherein,

[0028] When the movable member is in an initial position, the valve core flange abuts against the valve body flange.

[0029] According to the present application, a limit is provided for the movable part.

[0030] Optionally, the pressure limiting device further includes:

[0031] A biasing member is disposed between the movable member and the base member, and the biasing member biases the base member and the movable member toward each other so that the base member and the movable member are stabilized at an initial position.

[0032] According to the present application, the biasing member enables the movable member and the base member to move synchronously, and during the movement, the two remain relatively stationary.

[0033] Optionally, the biasing member is an elastic restoring element, one end of the biasing member is connected to an end of the base member away from the driving assembly, and the other end of the biasing member is connected to an end of the movable member close to the driving assembly.

[0034] According to the present application, the biasing member is located between the base member and the movable member in both the axial direction and the radial direction, and the biasing member applies axial biasing forces to the base member and the movable member respectively.

[0035] Optionally, the base member is provided with a limiting member, and the limiting member is used to limit the compression amount of the biasing member.

[0036] Optionally, the limiting member is an adjusting nut;

[0037] The inner wall of the base member is provided with threads, and the adjusting nut is engaged with the threads.

[0038] According to the present application, by adjusting the position of the adjusting nut in the base member, the biasing member can have different compression lengths, thereby having elastic forces with different strengths.

[0039] Optionally, the biasing member is always in a compressed state.

[0040] According to the present application, when the pressure limiting device is in a normal working state, the movable member and the base member can be stabilized in the initial position.

[0041] Optionally, the cooking appliance further comprises a pressure regulating component, wherein the pressure regulating component is used to blow air into the cooking space and form a positive pressure in the cooking space.

[0042] Optionally, the cover is provided with a vent for communicating with the cooking space;

[0043] The pressure regulating assembly comprises an air path structure capable of communicating with the vent, the communication port and the atmosphere respectively, and the air path structure comprises:

[0044] An airflow generating device is connected to the cooking space through the vent and is used to generate a unidirectional airflow at the vent.

[0045] According to the present application, the airflow is made to flow into or out of the cooking space by the airflow generating device.

[0046] Optionally, the vent is an air inlet and outlet;

[0047] The gas path structure also includes:

[0048] An airflow reversing device is used to realize airflow reversal in the air path structure.

[0049] Optionally, the airflow reversing device comprises a valve inner cavity and a valve core, wherein the valve core is arranged in the valve inner cavity and can move therein to switch the airflow channel inside the airflow reversing device;

[0050] The cooking utensil is constructed as follows:

[0051] At the same time or after the communication port opening and closing component blocks the communication port, the driving component drives the valve core to move in the valve inner cavity, so that the air flow direction in the air path structure at the air vent is from the cooking space to the outside;

[0052] When or after the connecting port opening and closing assembly opens the connecting port, the reversing assembly drives the valve core to move in the valve cavity, so that the air flow direction in the air path structure at the vent is from the outside to the cooking space.

[0053] According to the present application, the airflow reversing device is easy to control and has stable performance, and the cooking space has three air pressure states. When switching the air pressure state, the cooking appliance first adjusts the structure of the airflow path and then adjusts the airflow direction to achieve orderly control.

[0054] Optionally, the driving assembly is used to drive the communication port opening and closing assembly and the airflow reversing device to act accordingly, so that when the driving assembly acts, the communication port opening and closing assembly and the airflow reversing device act synchronously or in conjunction with each other.

[0055] According to the present application, the driving component can simultaneously drive the communication port opening and closing component and the airflow reversing device, so that the communication port opening and closing component and the airflow reversing device are linked, thereby collaboratively changing the connection state between the cooking space and the environment and the airflow direction in the air path, so that the air pressure in the cooking space can be easily controlled, the functional integration of the cooking appliance is improved, and the user experience is improved. The air pressure state of the cooking space is driven and switched by only one set of driving components, and the cooking appliance has a compact structure and low hardware cost.

[0056] Optionally, the driving assembly includes a power supply device and an intermediate power transmission device connected thereto, wherein the intermediate power transmission device is connected to the connecting port opening and closing assembly and the airflow reversing device for transmitting the power to the connecting port opening and closing assembly and the airflow reversing device.

[0057] According to the present application, the driving assembly is composed of a relatively independent power supply device and an intermediate power transmission device, and the control of the connecting port opening and closing assembly and the airflow reversing device is achieved through mechanical transmission to adapt to the narrower installation space of the cover body.

[0058] Optionally, the intermediate power transmission device is configured to be rotatable around a rotation axis extending along the second direction under the drive of the power supply device, and the intermediate power transmission device includes:

[0059] a first transmission surface, which is at least a portion of a circumferential surface of the intermediate power transmission device, and is used to connect to and act on the airflow reversing device, and different positions along the circumference of the first transmission surface have different radial distances from the rotation axis; and

[0060] The second transmission surface is a part of the surface of the intermediate power transmission device, used to connect to and act on the pressure limiting device, the second transmission surface has a second transmission surface first end and a second transmission surface second end arranged oppositely along the circumference of the intermediate power transmission device, and the position of the second transmission surface first end along the second direction is different from the position of the second transmission surface second end along the second direction.

[0061] According to the present application, by setting the first transmission surface and the second transmission surface, rotation is used as the power transmission to drive actuation in two directions, which has simple control and stable performance.

[0062] Optionally, in the projection of the intermediate power transmission device along the second direction, the second transmission surface is located in a first circumferential region of the intermediate power transmission device, and the first transmission surface is located in a second circumferential region of the intermediate power transmission device, and the first region and the second region at least partially overlap or do not overlap with each other.

[0063] According to the present application, the arrangement positions of the first transmission surface and the second transmission surface in the intermediate power transmission device are flexible.

[0064] Optionally, the second transmission surface further includes a second transmission surface middle portion located between the second transmission surface first end portion and the second transmission surface second end portion, and a position of the second transmission surface middle portion along the second direction varies with a circumferential position of the second transmission surface middle portion.

[0065] According to the present application, a transition may be provided between the first end of the second transmission surface and the second end of the second transmission surface via a middle portion of the second transmission surface.

[0066] Optionally, the intermediate power transmission device comprises:

[0067] a transmission part, the transmission part being configured to be rotatable around the rotation axis, at least a portion of an outer peripheral surface of the transmission part being configured to be arc-shaped, and the rotation axis passing through a center of the arc;

[0068] a protrusion connected to the arc-shaped circumferential surface of the transmission portion and protruding outward in a radial direction of the arc; and

[0069] an inclined portion, the inclined portion being connected to the transmission portion and provided with the second transmission surface;

[0070] The outer circumferential surface of the protrusion and a portion of the arcuate circumferential surface of the transmission part that is circumferentially adjacent to the protrusion constitute the first transmission surface.

[0071] According to the present application, the first transmission surface and the second transmission surface have different action directions, and the transmission body structure is reasonably arranged so that the first transmission surface and the second transmission surface do not affect each other's action surface arrangement and function realization.

[0072] Optionally, the second transmission surface is arranged on the axial end surface of the sloped portion.

[0073] According to the present application, the method for setting the second transmission surface is simple.

[0074] Optionally, the power supply device is configured as an electric motor.

[0075] According to the present application, the power supply device has low cost, simple control and stable performance.

[0076] Optionally, the cover body is provided with a push rod through hole;

[0077] The connecting port opening and closing assembly includes a push rod assembly, which is arranged in the push rod through hole, wherein the pressure limiting device is connected to and acts on the push rod assembly, so that the push rod assembly is movable between a blocking position and an open position relative to the push rod through hole, and the push rod assembly includes a first end of the push rod assembly and a second end of the push rod assembly arranged oppositely along a second direction, wherein when the push rod assembly is in the blocking position, the first end of the push rod assembly blocks the connecting port, and when the push rod assembly is in the open position, the first end of the push rod assembly opens the connecting port.

[0078] According to the present application, the connecting port opening and closing assembly has a compact structure and stable performance.

[0079] Optionally, the second end of the push rod assembly is provided with a push rod flange protruding outwardly in the radial direction, and the radial dimension of the push rod flange is greater than the radial dimension of the push rod through hole;

[0080] The communication port opening and closing assembly further comprises a push rod spring, which is sleeved on the outer periphery of the second end portion of the push rod assembly and is located between the push rod flange and the cover body.

[0081] According to the present application, the push rod spring returns the communication port opening and closing assembly from the blocking position to the open position.

[0082] Optionally, a sealing member is provided at one end of the push rod through hole facing the communicating port, and the sealing member is in sealing contact with the push rod assembly.

[0083] According to the present application, the seal can prevent water vapor from entering the interior of the cover body. BRIEF DESCRIPTION OF THE DRAWINGS

[0084] The following drawings of the embodiments of the present application are hereby used as part of the present application for understanding the present application. The drawings show the embodiments of the present application and their descriptions, and are used to explain the principles of the present application. In the drawings,

[0085] Figure 1 A side cross-sectional schematic diagram of a cooking appliance according to a preferred embodiment of the present application;

[0086] Figure 2 Schematic cross-sectional view of a pressure limiting device in a preferred embodiment of the present application, in which the base member and the movable member are in an initial position;

[0087] Figure 3 Schematic cross-sectional view of the pressure limiting device in the preferred embodiment of the present application, in which the base member and the movable member are in a position to make the communication port opening and closing assembly in a pressure relief state;

[0088] Figure 4 for Figure 1 A three-dimensional schematic diagram of the internal structure of the cover of the cooking utensil, in which the communication port opening and closing assembly is in an open position;

[0089] Figure 5 for Figure 4 A schematic top view of a cover body;

[0090] Figure 6 for Figure 5 Schematic diagram of the cross section taken along the midline AA;

[0091] Figure 7 for Figure 6 An enlarged schematic diagram of part B in FIG.

[0092] Figure 8 for Figure 7 An enlarged schematic diagram of part C in FIG.

[0093] Fig. 9 for Figure 1 A three-dimensional schematic diagram of the internal structure of the cover of the cooking utensil, in which the communication port opening and closing assembly is in a blocking position;

[0094] Fig.10 for Fig. 9 A schematic top view of a cover body;

[0095] Fig.11 for Fig.10 Schematic diagram of the cross section taken along the midline DD;

[0096] Fig.12 for Fig.11 An enlarged schematic diagram of part E in FIG.

[0097] Fig.13 for Fig.12 An enlarged schematic diagram of part F in FIG.

[0098] Fig.14 is a cross-sectional schematic diagram of the cover body;

[0099] Fig.15 for Fig.14 An enlarged schematic diagram of part G in FIG.

[0100] Fig.16 for Fig.15 An enlarged schematic diagram of part H in FIG.

[0101] Fig.17 It is a side cross-sectional schematic diagram of the communication port opening and closing assembly in a preferred embodiment of the present application, wherein the communication port opening and closing assembly is in an open position;

[0102] Fig.18 It is a side cross-sectional schematic diagram of the communication port opening and closing assembly in the preferred embodiment of the present application, wherein the communication port opening and closing assembly is located in a blocking position;

[0103] Fig.19 This is a three-dimensional schematic diagram of a driving component for driving the communication port opening and closing component in a preferred embodiment of the present application;

[0104] Fig. 20 It is a top view schematic diagram of a driving component for driving the communication port opening and closing component in a preferred embodiment of the present application;

[0105] Fig.21 It is a side cross-sectional schematic diagram of the airflow reversing device in a preferred embodiment of the present application, wherein the valve core is located at the second ventilation position;

[0106] Fig. 22 It is a side cross-sectional schematic diagram of the airflow reversing device in a preferred embodiment of the present application, wherein the valve core is located at a first ventilation position;

[0107] Fig.23 is a schematic diagram of the gas path of the cooking appliance, wherein the cooking cavity is in a working state where air is taken in from the additional air inlet and outlet and air is discharged from the connecting outlet;

[0108] Fig.24 A schematic diagram of a gas path of a cooking appliance, wherein the cooking cavity is evacuated from the additional gas inlet and outlet and the connecting port is in a decompression working state where air is closed; and

[0109] Fig.25 It is a schematic diagram of the gas path of the cooking appliance, in which the cooking cavity is blown from the additional air inlet and outlet and the connecting port is in a pressurized working state with the connecting port closed. DETAILED DESCRIPTION

[0110] In the following description, a large number of specific details are provided to provide a more thorough understanding of the present application. However, it is obvious to those skilled in the art that the present application embodiments can be implemented without one or more of these details. In other examples, in order to avoid confusion with the present application embodiments, some technical features well known in the art are not described.

[0111] Herein, ordinal numbers such as “first” and “second” cited in the present application are merely identifications and do not have any other meanings, such as a specific order, etc. Moreover, for example, the term “first component” itself does not imply the existence of the “second component”, and the term “second component” itself does not imply the existence of the “first component”.

[0112] In this document, “upper”, “lower”, “front”, “back”, “left”, “right”, etc. are only used to indicate the relative position relationship between related parts, rather than to limit the absolute positions of these related parts.

[0113] In this document, “equal”, “same”, etc. are not strictly limited in a mathematical and / or geometric sense, but also include errors that can be understood by those skilled in the art and are allowed in manufacturing or use.

[0114] Unless otherwise stated, the numerical ranges herein include not only the entire range within its two endpoints but also include several sub-ranges contained therein.

[0115] The present application provides a cooking appliance 100 .

[0116] Now, exemplary embodiments according to the present application will be described in more detail with reference to the accompanying drawings.

[0117] like Figure 1 As shown, the cooking utensil 100 of the present application includes a cover 10 and a pot 30. The pot 30 is used for cooking food, and the cover 10 is used to cover the pot 30. For example, the cover 10 is connected to the pot 30 in an openable and closable manner, and is used to cover the pot 30. When the cover 10 covers the pot 30, a cooking space 32 is formed between the cover 10 and the pot 30.

[0118] The pot body 30 is provided with a pot 31 for accommodating food, a heating device 33, a control device (not shown) and a temperature measuring component 34 (such as a temperature sensor). The pot 31 for holding food is removably arranged in the pot body 30. When the cover body 10 covers the pot body 30, a cooking space 32 is formed between the cover body 10 and the pot 31. The heating device 33 is arranged at the bottom of the pot body 30, below the pot 31, to heat the food in the pot 31. The control device can be, for example, a microcontrol unit (MCU) for implementing cooking control of the cooking utensil 100. The temperature measuring component 34 is used to detect the temperature of the pot 31 or the cooking control, which can be arranged at the bottom center of the pot body 30, or at the side of the pot body 30, or at the cover body 10. The temperature measuring component 34 is electrically connected to the control device. The temperature measuring component 34 feeds back the sensed temperature to the control device, so that the control device can achieve more accurate control of, for example, the heating device 33 based on the temperature information.

[0119] In the present application, when the cover body 10 covers the pot body 30, the cover body 10 is sealed and connected to the pot 31 to adapt to pressure cooking. The cover body 10 includes a surface cover 11, a lining cover 12 and a removable cover 13. The surface cover 11 is located at the outermost side of the cover body 10 (i.e., the uppermost side shown in the figure) to form the outer shell of the cover body 10. The lining cover 12 is arranged below the surface cover 11 and connected to the surface cover 11. For example, the lining cover 12 can be connected to the surface cover 11 by fasteners or buckles, and the surface cover 11 and the lining cover 12 constitute an upper cover assembly. The upper cover assembly is mainly used to centrally install various functional parts of the cover body 10 for sensing and controlling the working state of the cooking utensil 100, such as sensors. The removable cover 13 is located at the innermost side of the cover body 10 (i.e., the lowermost side shown in the figure) and is arranged below the lining cover 12. A sandwich layer can be formed between the lining cover 12 and the removable cover 13. The removable cover 13 is provided with a pot mouth sealing ring 14. When the cover body 10 covers the pot body 30, the pot mouth sealing ring 14 seals and contacts the opening or inner wall of the pot 31, thereby achieving a seal between the cover body 10 and the pot 31, which can adapt to pressure cooking and has a limiting and guiding effect on the direction of steam discharge. The removable cover 13 is detachably connected to the liner cover 12, for example, by a snap connection, so as to facilitate cleaning and replacement. The removable cover 13 is used to face the cooking space 32, that is, when the cover body 10 covers the pot body 30, the removable cover 13 is located directly above the cooking space 32.

[0120] In a preferred embodiment, the cover body 10 is provided with a ventilation cavity 16 and an air inlet and outlet cavity 19 , which form a part of the air path structure 96 of the cover body 10 .

[0121] The ventilation cavity 16 is, for example, surrounded by a portion of the lining cover 12 and a portion of the removable cover 13. Correspondingly, the removable cover 13 is provided with a communication port 17, which connects the ventilation cavity 16 with the cooking space 32. The lining cover 12 is provided with an outer ventilation hole 16A of the ventilation cavity 16, which is respectively connected to the ventilation cavity 16 and the external environment (atmosphere), so that the cooking space 32 is connected to the outside.

[0122] Similarly, the air inlet and outlet cavity 19 includes two openings, the vent 18 and the additional air inlet and outlet 18A. The vent 18 (also referred to as the air inlet and outlet in some embodiments) is provided on the removable cover 13. The vent 18 is used to connect the air inlet and outlet cavity 19 with the cooking space 32. The air flow can flow into or out of the cooking space 32 through the air inlet and outlet cavity 19 and the vent 18, so that the pressure in the cooking space 32 changes, and the relevant content will be described below.

[0123] The vent 18 and the communication port 17 are separately arranged, that is, the vent 18 and the communication port 17 are independent.

[0124] The gas path structure 96 of the cover body 10 further includes a steam valve 90. The steam valve 90 is mounted on the cover body 10 through the outer vent hole 16A of the vent cavity 16. The steam valve 90 is provided with an atmosphere communication opening 91 communicating with the outside world, and an inner cavity communication opening 92 communicating with the vent cavity 16. The inner cavity communication opening 92 can communicate with the atmosphere communication opening 91. Thus, the cooking space 32 is communicated with the outside environment through the communication opening 17, the vent cavity 16, the inner cavity communication opening 92, and the atmosphere communication opening 91.

[0125] On the basis of the above embodiment, a second sealing member 24 is provided between the lining cover 12 and the removable cover 13 to form the side wall of the ventilation cavity 16. The second sealing member 24 is in sealing contact with the lining cover 12 and the removable cover 13 respectively, so that the steam generated by cooking can only enter the ventilation cavity 16 from the connecting port 17, and will not enter other parts of the lining cover 12. Similarly, the inlet and outlet cavity 19 is in sealing contact with the removable cover 13 through the third sealing member 25, that is, the side wall of the inlet and outlet cavity 19 is in sealing contact with the removable cover 13, so that the steam generated by cooking can only enter the inlet and outlet cavity 19 from the vent 18, and will not enter other parts of the lining cover 12.

[0126] The cooking device 100 provided in the above embodiment has a pressure cooking function. The following describes a specific implementation method of the cooking device 100 to realize the pressure cooking function.

[0127] The cooking appliance 100 is provided with a communication port opening and closing assembly 40, which is used to open or block the communication port 17. As can be seen from the above, the communication port 17 is used to communicate with the cooking space 32. Specifically, the communication port opening and closing assembly 40 is movable relative to the communication port 17, and is used to open or block the communication port 17. When the communication port opening and closing assembly 40 opens the communication port 17, the steam valve 90 is connected to the cooking space 32 through the communication port 17, and the steam in the cooking space 32 can be discharged to the outside through the steam valve 90 by means of the gas path structure 96. When the communication port opening and closing assembly 40 blocks the communication port 17, the steam valve 90 is not connected to the cooking space 32, so that the air in the cooking space 32 will not be discharged through the communication port 17, thereby realizing the pressure cooking function.

[0128] The cooking appliance 100 is provided with a pressure regulating assembly, which is used to blow air into the cooking space 32 and form a positive pressure in the cooking space 32. In some embodiments, the pressure regulating assembly can also form a negative pressure or a gas flow state in the cooking space 32. Specifically, the pressure regulating assembly includes a vent 18 and an air path structure 96.

[0129] The gas path structure 96 also includes an airflow generating device 95. The airflow generating device 95 is connected to the cooking space 32 through the vent 18, and is used to generate a unidirectional airflow at the vent 18. It can be understood that the airflow generating device 95 is electrically connected to the control device and works under the control of the control device. Thus, the vent 18 and the connecting port 17 become two openings of the cooking space 32, and the airflow reversing device 50 can change the airflow direction between the vent 18 and the connecting port 17, so that the airflow direction in the cooking space 32 is changed. Specifically, the airflow generating device 95 can deliver or suck gas into the cooking space 32 through the vent 18. The connecting port opening and closing component 40 can open or block the connecting port 17. It can be understood that when the connecting port opening and closing component 40 blocks the connecting port 17, the airflow generating device 95 generates a unidirectional airflow at the vent 18, and the cooking space 32 can be in a negative pressure state or a positive pressure state to realize the pressure cooking function of the cooking appliance 100.

[0130] In some embodiments of the present application, the vent 18 is an air inlet and outlet. The gas circuit structure 96 also includes an airflow reversing device 50, which is used to achieve airflow reversal in the gas circuit structure 96. Specifically, the gas circuit structure 96 includes a steam valve 90, an airflow generating device 95, and an airflow reversing device 50 connected by pipelines. One end of the gas circuit structure 96 can be connected to the cooking space 32 through the connecting port 17, another end is connected to the cooking space 32 through the air inlet and outlet 18, and another end is connected to the atmosphere through the steam valve 90. In the present application, the airflow reversing device 50 is used to achieve airflow reversal in the gas circuit structure 96.

[0131] In this embodiment, the cooking space 32 in a normal state has three air pressure states under the action of the connecting port opening and closing component 40 and the air path structure 85. Specifically, the three pressure states of the cooking space 32 include: a first air pressure state in which the cooking space 32 is connected to the external environment (it can also be understood that the air pressure of the cooking space 32 is the same as the air pressure of the external environment); a second air pressure state in which the air pressure of the cooking space 32 is lower than the air pressure of the external environment; and a third air pressure state in which the air pressure of the cooking space 32 is higher than the air pressure of the external environment. It can be understood that according to the specific needs of different cooking processes of the cooking appliance 100, the cooking space 32 can have different air pressure states (air pressures) by controlling the connecting port opening and closing component 40 and the air path structure 85, so as to achieve the corresponding cooking effect.

[0132] Specifically, the communication port opening and closing assembly 40 opens the communication port 17 (eg Figure 4 and Fig.10 ), so that the cooking space 32 is connected to the external environment and is in the first air pressure state. The communication port opening and closing component 40 blocks the communication port 17 (such as Figure 5 and Fig.11 ), and the gas path structure 85 is in a state of extracting air from the cooking space 32, so that the cooking space 32 is sealed and the air flow is lost, so that it can be in the second air pressure state; the communication port opening and closing component 40 blocks the communication port 17 (such as Figure 5 and Fig.12 ), and the air path structure 85 is in a state of blowing air into the cooking space 32, so that the cooking space 32 is sealed and receives airflow, and can thus be in a third air pressure state.

[0133] It can be seen that to achieve the first air pressure state of the cooking space 32, it is only necessary to open the connecting port 17. At this time, the cooking space 32 is connected to the external environment, and the air pressure in the cooking space 32 is the same as the air pressure in the external environment when the ventilation balance is reached. At this time, if the airflow generating device 95 is working, an airflow will be formed inside the cooking space 32, between the connecting port 17 and the air inlet and outlet 18, and the airflow contains air from the external environment, thereby accelerating the ventilation of the cooking space 32 and the external environment, and basically does not affect the air pressure in the cooking space 32. To achieve the second air pressure state and the third air pressure state, the connecting port 17 must be blocked, and the airflow generating device 95 must be operated at the same time to achieve the required air pressure state.

[0134] In some embodiments of the present application, the cooking appliance 100 further includes a driving assembly 60, which is disposed on the cover 10. The driving assembly 60 can drive the communication port opening and closing assembly 40 and the airflow reversing device 50 to act accordingly, either individually or in conjunction, to achieve the aforementioned three air pressure states. Preferably, the communication port opening and closing assembly 40 and the airflow reversing device 50 act synchronously or in conjunction. It is understandable that the driving assembly 60 is electrically connected to the control device and operates under the control of the control device.

[0135] The following describes the mechanism by which the communication port opening and closing assembly 40 opens or closes the communication port 17 .

[0136] In the present application, the cooking appliance 100 is configured such that the driving assembly 60 drives the communication port opening and closing assembly 40 to move between an open position and a blocked position relative to the cover body 10 along the second direction D2. When the communication port opening and closing assembly 40 is located at the open position, the communication port opening and closing assembly 40 opens the communication port 17; when the communication port opening and closing assembly 40 is located at the blocked position, the communication port opening and closing assembly 40 blocks the communication port 17.

[0137] In some embodiments of the present application, the lining cover 12 is provided with a fixing seat for installing the function component. The fixing seat includes a second fixing seat 22 surrounding the ventilation cavity 16 and a first fixing seat 21 arranged on the second fixing seat 22. The first fixing seat 21 is provided with a push rod through hole 26 extending along the second direction D2, and the push rod through hole 26 extends all the way to the ventilation cavity 16. The connecting port 17 is located directly below the push rod through hole 26. The connecting port opening and closing assembly 40 includes a push rod assembly 45, and the push rod assembly 45 is arranged in the push rod through hole 26, wherein the push rod assembly 45 is movable between a blocked position and an open position relative to the push rod through hole 26. The push rod assembly 45 is provided with a push rod assembly first end 46 and a push rod assembly second end 47 which are arranged oppositely along the second direction D2. As shown in FIG. Fig.18 As shown, when the push rod assembly 45 is in the blocking position, the first end portion 46 of the push rod assembly blocks the communication port 17, and the cooking space 32 is not connected to the ventilation cavity 16; Fig.17 As shown, when the push rod assembly 45 is in the open position, the first end portion 46 of the push rod assembly opens the communication port 17, and the cooking space 32 is in communication with the ventilation cavity 16. The blocking position of the push rod assembly 45 is lower than the open position of the push rod assembly 45.

[0138] The first sealing member 23 is provided at one end of the push rod through hole 26 facing the ventilation cavity 16, and the first sealing member 23 is used to seal the push rod through hole 26 and the ventilation cavity 16. Specifically, the first sealing member 23 seals and contacts the push rod assembly 45, so that the gas in the ventilation cavity 16 will not leak from the push rod through hole 26. The second end 47 of the push rod assembly is provided with a push rod flange 43 protruding outward in the radial direction, and the radial dimension of the push rod flange 43 is greater than the radial dimension of the push rod through hole 26. The communication port opening and closing assembly 40 also includes a push rod spring 44, which is sleeved on the outer periphery of the second end 47 of the push rod assembly and is located between the push rod flange 43 and the first fixing seat 21. When in the blocking position, the first end 46 of the push rod assembly presses the first sealing member 23 to the communication port 17, and the push rod spring 44 is compressed at the same time. Preferably, the push rod spring 44 is compressed to the minimum stroke.

[0139] In a feasible implementation of this embodiment, the push rod assembly 45 includes a push rod 41 and a push rod sleeve 42. The push rod 41 extends along the second direction D2. Specifically, the push rod 41 is disposed in the push rod through hole 26 and is located in the blocking position (eg, Fig.18 as shown) and the open position (as Fig.17 The push rod 41 includes a first end 48 and a second end 49 of the push rod, which are arranged oppositely along the second direction D2. The first end 48 of the push rod is used to block or open the connecting port 17. When the push rod is in the blocking position, the first end 48 of the push rod blocks the connecting port 17; when the push rod is in the open position, the first end 48 of the push rod opens the connecting port 17. The first sealing member 23 seals and contacts the first end 48 of the push rod, so that the gas in the ventilation cavity 16 will not leak from the push rod through hole 26. The first end 48 of the push rod is also the first end 46 of the push rod assembly. The push rod sleeve 42 is sleeved on the outer periphery of the second end 49 of the push rod, and the push rod sleeve 42 moves synchronously with the push rod 41 along the second direction D2 relative to the first fixed seat 21. A push rod flange 43 is provided at one end of the push rod sleeve 42 away from the connecting port 17 along the second direction D2. The push rod spring 44 is sleeved on the outer periphery of the push rod sleeve 42 and is located between the push rod flange 43 and the first fixing seat 21. The push rod second end 49 and the push rod sleeve 42 constitute a push rod assembly second end 47.

[0140] When the driving assembly 60 drives the push rod sleeve 42 to move relative to the first fixed seat 21 along the second direction D2 (for example, moving downward toward the communication port 17), the push rod 41 moves to the blocking position, and the push rod spring 44 is compressed; when the driving assembly 60 releases the driving force on the push rod sleeve 42, the push rod spring 44 causes the push rod sleeve 42 to move relative to the first fixed seat 21 along the second direction D2 (for example, moving upward away from the communication port 17), so that the push rod moves to the open position. It can be understood that the push rod 41 changes its position relative to the communication port 17 (from the open position to the blocking position, or from the blocking position to the open position), that is, the communication port opening and closing assembly 40 changes its working state.

[0141] The specific implementation of the airflow reversing device 50 is introduced below.

[0142] like Fig.21 and Fig. 22 As shown, the airflow reversing device 50 is configured as a reversing valve 50, for example. The reversing valve 50 includes a valve inner cavity 55A and a valve core 56. The valve core 56 is disposed in the valve inner cavity 55A and can move therein to switch the airflow channel inside it, thereby changing the airflow direction in the air path structure 96. The reversing valve 50 includes a valve body 55 and a valve core 56. The valve body 55 is disposed to the cover body 10 (specifically, the lining cover 12), and includes the valve inner cavity 55A (that is, the valve body 55 is a hollow structure). The valve core 56 is disposed in the valve inner cavity 55A, and is in a first ventilation position (such as relative to the valve inner cavity 55A) along a first direction D1 (that is, relative to the valve body 55). Fig. 22 ) and the second ventilation position (eg Fig.21 ) can be moved between.

[0143] It can be understood that the valve core 56 changes its position relative to the valve body 55 (from the first ventilation position to the second ventilation position, or from the second ventilation position to the first ventilation position), that is, the reversing valve 50 changes its working state. The cooking appliance 100 is configured such that the driving assembly 60 drives the valve core 56 to move relative to the valve cavity 55A (that is, the cover body 10) along the first direction D1 in the valve cavity 55A between the first ventilation position and the second ventilation position.

[0144] The reversing valve 50 includes a first vent 51, a second vent 52, a third vent 53, and a fourth vent 54. The reversing valve 50 is configured so that the communication relationship between the first vent 51, the second vent 52, the third vent 53, and the fourth vent 54 can be changed. For example, the first vent 51 can be communicated with the third vent 53 or the fourth vent 54. When the first vent 51 is communicated with one of the third vent 53 and the fourth vent 54, the second vent 52 is communicated with the other of the third vent 53 and the fourth vent 54.

[0145] like Figure 23 to Figure 25 As shown, the airflow generating device 95 is configured as an air pump, for example. The air pump has an air pump air inlet 93 and an air pump air outlet 94. Specifically, one of the first air vent 51 and the second air vent 52 is communicated with the air pump air outlet 94. The other of the first air vent 51 and the second air vent 52 is communicated with the air pump air inlet 93. One of the third air vent 53 and the fourth air vent 54 is communicated with the air inlet and outlet 18. The other of the third air vent 53 and the fourth air vent 54 is communicated with the external environment.

[0146] Specifically, one of the third vent 53 and the fourth vent 54 of the reversing valve 50 is connected to the additional inlet and outlet 18A of the inlet and outlet air cavity 19 through a sealed air pipe, thereby being connected to the inlet and outlet 18, that is, one end of the air path structure 96 is connected to the inlet and outlet 18. According to the above, the steam valve 90 is connected to the outside world. The other of the third vent 53 and the fourth vent 54 of the reversing valve 50 is connected to the steam valve 90, so that the other end of the air path structure 96 is connected to the outside world. Among them, the opening of the steam valve 90 connected to the reversing valve 50 is not used to discharge steam, that is, the steam valve 90 is provided with an independent outlet for discharging steam, and the steam valve 90 is always connected to the external environment. Specifically, the steam valve 90 is respectively connected to the airflow generating device 95, the cooking space 32, and the external environment. It should be noted that when the cooking space 32 is in the first air pressure state, the cooking space 32 is connected to the steam valve 90 to exhaust steam to the outside environment, and the airflow generating device 95 is connected to the steam valve 90 to send the outside environment air into the cooking space 32. At this time, the exhaust passage of the cooking space 32 and the air intake passage of the airflow generating device 95 may not be connected inside the steam valve 90, that is, the exhaust passage of the cooking space 32 and the air intake passage of the airflow generating device 95 are different passages of the steam valve 90.

[0147] Based on the above, the steam valve 90 has at least four vents and two unconnected channels. The first vent (i.e., the inner cavity communication opening 92) is connected to the ventilation cavity 16, the second vent is connected to the airflow generating device 95, and the third vent and the fourth vent (i.e., the atmosphere communication opening 91) are respectively connected to the outside world. The inner cavity communication opening 92 and the atmosphere communication opening 91 are connected to the first steam valve 90 channel, and the second vent and the third vent are connected to the second steam channel of the box. When the cooking space 32 is in the first air pressure state, the outside air enters the air path structure 96 through the third vent, the second channel, and the second vent of the steam valve 90 under the action of the airflow generating device 95, and then the airflow generating device 95 sends the inhaled outside air into the cooking space 32, and the steam generated in the cooking space 32 is discharged to the outside world through the connecting port 17, the ventilation cavity 16, the inner cavity communication opening 92, the first channel, and the atmosphere communication opening 91.

[0148] The specific internal communication mode of the reversing valve 50 is introduced below.

[0149] like Fig.21 and Fig. 22 As shown, the valve body 55 has a valve body first end 55C and a valve body second end 55D which are arranged oppositely along the first direction D1. The valve body first end 55C is provided with a valve hole 55B. The valve core 56 extends out of the valve hole 55B at least in the second ventilation position. The reversing valve 50 also includes a valve core spring 57. The valve core spring 57 is also arranged in the valve inner cavity 55A and is located between the valve body second end 55D and the valve core 56. The valve core spring 57 extends along the first direction D1. Preferably, the first direction D1 is a horizontal direction.

[0150] Specifically, the valve core 56 includes a valve core body 58, a first through hole 58B, a second through hole 58C, a first sealing ring 59A, a second sealing ring 59B and a third sealing ring 59C. The valve core body 58 is arranged in the valve inner cavity 55A and is movable between a first ventilation position and a second ventilation position relative to the valve inner cavity 55A along the first direction D1. The valve core body 58 extends out of the valve hole 55B at least in the second ventilation position. The valve core body 58 includes the valve core inner cavity 58A, that is, the valve core body 58 is a hollow structure. The first through hole 58B and the second through hole 58C are arranged in the valve core body 58 so that the valve inner cavity 55A is connected with the valve core inner cavity 58A. The first through hole 58B and the second through hole 58C are spaced apart along the first direction D1, the first through hole 58B is close to the first end 55C of the valve body, and the second through hole 58C is close to the second end 55D of the valve body. The first sealing ring 59A, the second sealing ring 59B and the third sealing ring 59C are sleeved on the outer periphery of the valve core body 58 and sealably contact the inner wall of the valve inner cavity 55A. The first sealing ring 59A, the second sealing ring 59B and the third sealing ring 59C are arranged in sequence along the first direction D1, and the first sealing ring 59A is closest to the first end 55C of the valve body. Among them, the first sealing ring 59A and the second sealing ring 59B are respectively located on both sides of the first through hole 58B along the first direction D1, and the second sealing ring 59B and the third sealing ring 59C are located between the first through hole 58B and the second through hole 58C along the first direction D1.

[0151] On the basis of the above embodiment, the four vents of the valve body 55 are arranged in the order of the first vent 51, the third vent 53, the second vent 52, and the fourth vent 54 along the first direction D1, wherein the first vent 51 is close to the first end 55C of the valve body, and the fourth vent 54 is close to the second end 55D of the valve body. It can be understood that the three sealing rings divide the valve inner cavity 55A into four parts that are not connected to each other, namely, the first inner cavity 55E located between the first sealing ring 59A and the first end 55C of the valve body, the second inner cavity 55F located between the first sealing ring 59A and the second sealing ring 59B, the third inner cavity 55G located between the second sealing ring 59B and the third sealing ring 59C, and the fourth inner cavity 55H located between the third sealing ring 59C and the second end 55D of the valve body. It can be understood that when the valve core body 58 moves along the first direction D1, the positions of the three sealing rings in the valve cavity 55A change, so that the distribution of the four parts of the valve cavity 55A changes, thereby changing the docking relationship between the four parts of the valve cavity 55A and the four air ports of the valve body 55, thereby changing the connection relationship of the four air ports.

[0152] Thus, the reversing valve 50 can be configured such that when the valve core body 58 is located at the second ventilation position (eg Fig.21 ), the first vent 51 and the third vent 53 are located between the second sealing ring 59B and the third sealing ring 59C along the first direction D1, and the second vent 52 and the fourth vent 54 are located on the side of the third sealing ring 59C close to the second end 55D of the valve body along the first direction D1. Thus, the first vent 51 and the third vent 53 are connected through the third inner cavity 55G, and the second vent 52 and the fourth vent 54 are connected through the fourth inner cavity 55H. It can be understood that inside the reversing valve 50, the air path connecting the first vent 51 and the third vent 53 and the air path connecting the second vent 52 and the fourth vent 54 are independent of each other and do not communicate with each other.

[0153] The reversing valve 50 is also configured such that when the valve core body 58 is located at the first ventilation position (eg Fig. 22As shown in FIG. 5 , the first sealing ring 59A and the second sealing ring 59B are respectively located on both sides of the first vent 51 along the first direction D1, the second vent 52 and the third vent 53 are located between the second sealing ring 59B and the third sealing ring 59C along the first direction D1, and the third sealing ring 59C is located on the side of the fourth vent 54 close to the first end 55C of the valve body. Thus, the first vent 51 is connected to the fourth vent 54 through the second inner cavity 55F, the first through hole 58B, the valve core inner cavity 58A, the second through hole 58C and the fourth inner cavity 55H, and the second vent 52 is connected to the third vent 53 through the third inner cavity 55G. It can be understood that inside the reversing valve 50, the air path connecting the first vent 51 and the fourth vent 54 and the air path connecting the second vent 52 and the third vent 53 are independent of each other and are not connected to each other.

[0154] It can be understood that, depending on the connection relationship between the four air vents of the reversing valve 50 and the air pump inlet 93, the air pump outlet 94, the steam valve 90 and the air inlet and outlet 18, when the valve core body 58 is located in the first ventilation position, the air path structure 96 is in one of the states in which the airflow enters the cooking space 32 and flows out of the cooking space 32 from the air inlet and outlet 18; when the valve core body 58 is located in the second ventilation position, the air path structure 96 is in another state in which the airflow enters the cooking space 32 and flows out of the cooking space 32 from the air inlet and outlet 18.

[0155] exist Figure 23 to Figure 25 In the embodiment shown, the first vent 51 is communicated with the air pump outlet 94, the second vent 52 is communicated with the air pump inlet 93, the third vent 53 is communicated with the air inlet and outlet 18, and the fourth vent 54 is communicated with the communication port 17. Thus, when the valve core body 58 is located at the first ventilation position, the air flow generating device 95 draws air from the cooking space 32 via the air inlet and outlet 18 (e.g., Fig.24 When the valve core body 58 is in the second ventilation position, the air flow generating device 95 blows air to the cooking space 32 via the air inlet and outlet 18 (as shown); Fig.23 and Fig.25 shown).

[0156] like Figures 2 to 16 As shown, the cooking appliance 100 is provided with a pressure limiting device 80 . The pressure limiting device 80 is used to transmit the driving force of the driving assembly 60 to the communication port opening and closing assembly 40 .

[0157] The specific implementation of the pressure limiting device 80 is introduced below.

[0158] As can be seen from the foregoing, when the cooking device 100 realizes the pressure cooking function, it is necessary to control the opening and closing of the communication port 17.

[0159] The pressure limiting device 80 includes a base member 81 and a movable member 83. The base member 81 and the movable member 83 can move relative to each other between an initial position and a pressure relief position. It can be understood that the initial position and the pressure relief position refer to the relative positions of the base member 81 and the movable member 83. The base member 81 can move relative to the movable member 83. The movable member 83 can move relative to the base member 81.

[0160] The pressure limiting device 80 also includes a biasing member 87. Preferably, the biasing member 87 is a pressure relief spring. The pressure relief spring 87 biases the base member 81 and the movable member 83 toward each other so that the base member 81 and the movable member 83 are stabilized in the initial position. That is, the biasing force of the pressure relief spring can keep the base member 81 and the movable member 83 in the initial position within a certain force range. In this state, at least part of the movable member 83 and the base member 81 are in close contact, and the movable member 83 and the base member 81 can move synchronously. During the movement, the two remain relatively still. The two ends of the pressure relief spring abut against the base member 81 and the movable member 83 respectively.

[0161] The driving assembly 60 is connected to the pressure limiting device 80 , and is used to drive the pressure limiting device 80 in the initial position to move, so as to drive the communication port opening and closing assembly 40 to open or block the communication port 17 .

[0162] In some embodiments of the present application, the driving force of the driving assembly 60 is transmitted to the connecting port opening and closing assembly 40 by the cooperation of the pressure limiting device 80 and the connecting rod 62, thereby changing the position of the connecting port opening and closing assembly 40, and further controlling the opening and closing of the connecting port 17.

[0163] In this embodiment, the movable member 83 is connected to the driving assembly 60 , and the base member 81 is connected to the connecting rod 62 .

[0164] The connecting rod 62 is configured to be rotatable around a first axis of the connecting rod 62, wherein the first axis of the connecting rod 62 extends in a horizontal direction. For example, the connecting rod 62 is mounted to the liner 12 via a horizontal pin 65, and the connecting rod 62 is rotatable relative to the liner 12 around the pin 65, that is, the first axis of the pin 65 is the rotation axis of the connecting rod 62. The connecting rod 62 has a connecting rod first end 63 and a connecting rod second end 64 that are oppositely arranged, wherein the connecting rod first end 63 is connected to and acts on the push rod sleeve 42. The pressure limiting device 80 changes the position of the connecting rod second end 64 along the second direction D2 to rotate the connecting rod 62, thereby changing the position of the connecting rod first end 63 along the second direction D2, thereby causing the push rod 41 to be located in a blocking position or an open position.

[0165] In some embodiments of the present application, the driving assembly 60 drives the pressure limiting device 80 (at this time, the base member 81 and the movable member 83 are stabilized in the initial position) to cause the connecting rod 62 to rotate around the first axis relative to the cover body 10, thereby driving the connecting port opening and closing assembly 40 to move between the open position and the blocked position.

[0166] In some other embodiments of the present application, when the pressure in the cooking space 32 reaches a preset value, the connecting port opening and closing assembly 40 can move toward the open position under the action of pressure, so that the connecting rod 62 can rotate around the first axis relative to the cover body 10, and the base member 81 can move to the pressure relief position relative to the movable member 83.

[0167] Therefore, under the premise that the cooking space 32 has the aforementioned third air pressure state, under the action of the pressure limiting device 80 and the connecting port opening and closing component 40, the cooking space 32 also has a fourth air pressure state: the air pressure of the cooking space 32 is higher than the air pressure of the external environment, and the air pressure of the cooking space 32 is higher than the preset value, the connecting port opening and closing component 40 opens the connecting port 17, and the cooking space 32 is connected to the external environment through the connecting port 17. In the present application, the air pressure of the cooking space 32 is higher than the preset value. Accordingly, when the cooking space 32 is in the third air pressure state, the air pressure of the cooking space 32 is higher than the air pressure of the external environment, and the air pressure of the cooking space 32 is not higher than the preset value, and the connecting port opening and closing component 40 blocks the connecting port 17. That is, the air pressure in the cooking space 32 can be in a certain positive pressure range to ensure safety while meeting cooking needs.

[0168] Further, when the pressure limiting device 80 is in the pressure relief working state, the cooking space 32 can be in a fourth air pressure state: when the pressure in the cooking space 32 reaches a preset value, the connecting port opening and closing assembly 40 moves toward the open position under the action of the pressure in the cooking space 32, thereby changing the position of the first end 63 of the connecting rod along the second direction D2, so that the connecting rod 62 rotates, thereby changing the position of the second end 64 of the connecting rod along the second direction D2, and the movable member 83 remains in the second direction D2 relative to the cover body 10 under the action of the driving assembly 60, and the base member 81 approaches the cover body 10 (i.e., moves toward the pressure relief position) under the action of the connecting rod 62; when the pressure in the cooking space 32 is lower than the preset value, the base member 81 returns to the initial position under the action of the elastic force of the pressure relief spring, and the position of the second end 64 of the connecting rod along the second direction D2 changes, so that the connecting rod 62 rotates, thereby changing the position of the first end 63 of the connecting rod along the second direction D2, and the connecting port opening and closing assembly 40 returns to the blocked position. When the pressure limiting device 80 is in a normal working state, the cooking space 32 can be in a first air pressure state, a second air pressure state and a third air pressure state: the base member 81 and the movable member 83 are stabilized in an initial position under the biasing force of the pressure relief spring 87, and the driving assembly 60 drives the pressure limiting device 80 to move as a whole relative to the cover body 10, thereby changing the position of the second end 64 of the connecting rod along the second direction D2, so that the connecting rod 62 rotates, thereby changing the position of the first end 63 of the connecting rod along the second direction D2, and thereby making the connecting port opening and closing assembly 40 located in a blocked position or an open position.

[0169] Furthermore, refer to Figures 4 to 8 , the pressure limiting device 80 is in a normal working state, that is, the base member 81 and the movable member 83 are in the initial position, and the connecting port opening and closing assembly 40 is in the open position, the forces at both ends of the connecting rod 62 are:

[0170] (F 1 -G 连通口开闭组件40 )*L 1 ≥G 限压装置80 *L 2

[0171] Among them, F 1 L is the upward force of the push rod spring 44; 1 L is the distance from the central axis of the push rod to the fulcrum of the lever; 2 It is the distance from the central axis of the moving part to the fulcrum of the lever;

[0172] F 扭1 =F 扭 *COS(θ 2 );F 扭2 =F 扭1 *COS(θ 1) ; In the initial state, F 扭 =0

[0173] Among them, F 扭 is the motor torque, F 扭1 is the component force in the direction perpendicular to the inclined plane, F 扭2 F 扭1 The vertical upward component, i.e. the lifting force;

[0174] F 2 This force is the internal force of the pressure limiting device 80, acting between the movable member 83 and the base member 81, so that the movable member 83 and the base member 81 are relatively stationary, such as Figure 2 As shown, the pressure limiting device 80 is in a normal working state, and under the action of the driving assembly 60 and the connecting rod 62, the base member 81 will not retract.

[0175] Reference Figures 9 to 13 , the pressure limiting device 80 is in a normal working state, that is, the base member 81 and the movable member 83 are in the initial position, and the connecting port opening and closing assembly 40 is in the closed position, the forces at both ends of the connecting rod 62 are:

[0176] F 5 *L 1 ≤F 4 *L 2

[0177] F 扭1 =F 扭 *COS(θ 2 );F 扭2 =F 扭1 *COS( θ1 )

[0178] F 7 =F 5 / COS( θ1 ); F4 = F twist 2 *COSθ 1 =F 扭1 *COS(θ 1 ) 2 =F 扭 *COS(θ 2 )

[0179] *COS(θ 1 ) 2 ;

[0180] Among them, F 扭1 is the component force in the direction perpendicular to the inclined plane, F 扭2 F 扭1 The vertical upward component, i.e. the lifting force;

[0181] F 7 ≥F 1(force when the push rod spring 44 is fully compressed), at which time the communication port 17 will be closed.

[0182] Reference Figures 14 to 16 , the pressure limiting device 80 is in the pressure relief working state. Before this, the air pressure in the cooking space 32 is positive pressure, the driving component 60 brakes the pressure limiting device 80 to the highest position, and presses the connecting port opening and closing component 40 to the lowest position through the connecting rod 62. If an abnormal situation occurs at this time, such as the internal pressure of the cooking space 32 is greater than the set value, or the program crashes or the motor is damaged, causing the driving component 60 to be unable to continue braking, the connecting port 17 cannot be opened normally, and the pot body 30 cannot be depressurized. The air pressure in the cooking space 32 continues to increase to the preset value under the action of the air path structure 96 or in the heating state, and the two ends of the connecting rod 62 are subjected to the following forces:

[0183] F 1 +F 3 ≥F 7 , that is: F 3 ≥F 7 -F 1 When F 3 COSθ 1 *L 1 ≥F 2 *L 2 At this time, the spring of the pressure limiting device 80 is compressed and causes the valve core 56 to move upward. Fig.14 As shown, the communication port 17 is opened, wherein, Fig.14 As shown in FIG. 4 , the communication port opening and closing assembly 40 is in an open position, and the base member 81 and the movable member 83 are in a pressure relief position. It can be understood that in actual use, according to different pressures F 3 , the communication port opening and closing assembly 40 can be in different positions between the open position and the blocked position.

[0184] Among them, F 3 The set pressure value F in the pot 31 锅胆 , that is: F 3 =F 锅胆 ; That is, when the pressure inside the pot 31 is F 锅胆 =F 3 ≥F 7 -F 1 When the connecting port opening and closing assembly 40 moves upward, the pressure relief spring of the pressure limiting device 80 is compressed (the base member 81 moves downward), so the first end 63 of the connecting rod opens upward, and the connecting port 17 can be exhausted;

[0185] On the contrary, when F 7 -F 1 ≥F 3 =F 锅胆 When F 3 COSθ1 *L 1 ≤F 2 *L 2 At this time, the pressure relief spring in the pressure limiting device 80 will return the base member 81 to the initial position, and the first end 63 of the connecting rod will move downward again and close the connecting port 17. In this way, the pressure inside the pot body 30 can be maintained within a certain range.

[0186] Based on the above embodiment, F 3 =P 内胆 / S; S = π*(d / 2) 2 ;

[0187] P 内胆 is the pressure in the cooking space 32 , and d is the diameter of the communication port 17 .

[0188] Preferably, 2 mm ≤ d ≤ 50 mm. More preferably, 5 mm ≤ d ≤ 20 mm.

[0189] As can be seen from the above, when the motor abnormally blocks the communication port 17, a one-way valve (ie, pressure limiting device 80) is provided at one end of the lever to utilize the pressure difference to open the communication port 17 and release the pressure safely.

[0190] The specific implementation of the pressure limiting device 80 is introduced below.

[0191] In some embodiments of the present application, the base member 81 is constructed as a hollow tubular structure, and the outer periphery of the base member 81 is connected to the second end 64 of the connecting rod. The tubular structure can constitute a radial limit for the components installed therein, and the components inside the tube can move axially along the tube wall. The movable member 83 is movably sleeved into the base member 81 along the axial direction of the movable member 83. The movable member 83 can achieve smooth movement in the axial direction in the base member 81, with high movement accuracy, strong stability, and low vibration and noise.

[0192] In some embodiments of the present application, the movable member 83 includes a movable member first end 84 and a movable member second end 85 which are arranged oppositely along the axial direction of the movable member 83, and the movable member first end 84 is connected to the driving assembly 60. It can be understood that the movable member first end 84 extends out of the base member 81 so as to be better connected to the driving assembly 60.

[0193] On the basis of the above embodiment, the movable member 83 is provided with a valve core flange 86 protruding outward in the radial direction near the first end 84 of the movable member, and the base member 81 is provided with a valve body flange 82 protruding inward in the radial direction, and the valve body flange 82 is closer to the drive assembly 60 than the valve core flange 86; the positional relationship between the valve body flange 82 and the valve core flange 86 enables the base member 81 to move relative to the movable member 83 toward the drive assembly 60, so that when the drive assembly 60 is not in motion, the base member 81 can move relative to the movable member 83, and then the lever can be pressed down. Under the action of the pressure relief spring, the pressure limiting device 80 is in the initial position, and the valve core flange 86 abuts against the valve body flange 82.

[0194] In a feasible implementation of this embodiment, one end of the pressure relief spring 87 is connected to one end of the base member 81 away from the driving assembly 60, and the other end of the pressure relief spring 87 is connected to one end of the valve core flange 86 away from the driving assembly 60. Thus, the pressure relief spring is located between the base member 81 and the movable member 83 in both the axial direction and the radial direction. The pressure relief spring applies axial elastic force to the base member 81 and the movable member 83 respectively.

[0195] In some embodiments of the present application, the base member 81 is provided with a limit member 88, and the limit member 88 is used to limit the compression amount of the pressure relief spring 87. Specifically, the limit member 88 is an adjusting nut, and the adjusting nut 88 is connected to the other end of the pressure relief spring 87. The second end 85 of the movable member is movably sleeved on the adjusting nut 88. The inner wall of the base member 81 is provided with a thread, and the adjusting nut 88 is engaged with the thread. The pressure relief spring is arranged between the adjusting nut 88 and the valve core flange 86. By adjusting the position of the adjusting nut 88 in the base member 81, the pressure relief spring can have different compression lengths, thereby having elastic forces of different strengths.

[0196] It can be understood that the pressure relief spring 87 is always in a compressed state, so that when the pressure limiting device 80 is in a normal working state, the movable member 83 and the base member 81 can be stabilized in the initial position.

[0197] The braking method of the driving assembly 60 on the pressure limiting device 80 is described below.

[0198] In some embodiments of the present application, the driving assembly 60 includes a power supply device 61 and an intermediate power transmission device 70 connected thereto, wherein the power supply device 61 is used to provide power to activate the pressure limiting device 80. Specifically, the intermediate power transmission device 70 is connected to the movable member 83 to transmit power to the movable member 83.

[0199] Furthermore, the driving assembly 60 can act on the pressure limiting device 80 and the airflow reversing device at the same time. The driving assembly 60 includes a power supply device 61 and an intermediate power transmission device 70 connected thereto, wherein the power supply device 61 is used to provide power for the pressure limiting device 80 and the airflow reversing device 50 to move, and the intermediate power transmission device 70 is connected to the pressure limiting device 80 and the airflow reversing device 50 respectively, and is used to transmit the power provided by the power supply device 61 to the pressure limiting device 80 and the airflow reversing device 50, and the pressure limiting device 80 transmits the power to the connecting port opening and closing assembly 40. Furthermore, the movement of the connecting port opening and closing assembly 40 and the airflow reversing device is coordinated to realize the aforementioned four air pressure states in the cooking space 32. In this embodiment, one of the functions of the driving assembly 60 is to realize the movement of the valve core 56 in the airflow reversing device 50 in the first geometric dimension, and the second function is to realize the movement of the pressure limiting device 80 in the second geometric dimension, wherein the pressure limiting device 80 realizes the movement of the push rod 41 in the connecting port opening and closing assembly 40 in the third geometric dimension through the connecting rod 62. From the foregoing, it can be seen that the pressure limiting device 80 in normal working condition, the connecting port opening and closing assembly 40, and the connecting rod 62 form a lever mechanism, that is, the pressure limiting device 80 serves as a power transmission component, and the ultimate purpose of the driving assembly 60 is to coordinate the movement of the connecting port opening and closing assembly 40 and the airflow reversing device.

[0200] Specifically, the intermediate power transmission device 70 is movable relative to the cover body 10, and is respectively connected to the valve core 56 and the movable member 83 of the pressure limiting device 80. The base member 81 of the pressure limiting device 80 is connected to the communication port opening and closing assembly 40 to act on the valve core 56, the push rod, and the pressure limiting device 80, thereby realizing the aforementioned three functions of the drive assembly 60. The intermediate power transmission device 70 has a decompression working state, a pressurization working state, a pressure relief working state, and a ventilation working state. Specifically, the intermediate power transmission device 70 is used to change the position of the pressure limiting device 80 along the second direction D2, so as to change the position of the second end 64 of the connecting rod along the second direction D2, thereby changing the position of the first end 63 of the connecting rod along the second direction D2. The power supply device 61 acts on the intermediate power transmission device 70, and is used to move the intermediate power transmission device 70 relative to the cover body 10, so that the intermediate power transmission device 70 changes its working state between the decompression working state, the pressurization working state, the pressure relief working state, and the ventilation working state.

[0201] Preferably, the cooking appliance 100 is constructed as follows: while or after the connecting port opening and closing component 40 blocks the connecting port 17, the driving component 60 drives the valve core 56 to move in the valve cavity 55A, so as to realize that the air flow direction in the air path structure 96 at the air inlet and outlet 18 is from the cooking space 32 to the outside; or, while or after the connecting port opening and closing component 40 blocks the connecting port 17, the driving component 60 drives the valve core 56 to move in the valve cavity 55A, so as to realize that the air flow direction in the air path structure 96 at the air inlet and outlet 18 is from the outside to the cooking space 32; or, while the connecting port opening and closing component 40 opens the connecting port 17, the base member 81 of the pressure limiting device 80 moves toward the pressure relief position relative to the movable member 83, so as to realize that the air pressure in the cooking space 32 is released from the connecting port 17.

[0202] Preferably, the cooking appliance 100 is constructed such that at the same time or after the connecting port opening and closing assembly 40 opens the connecting port 17, the driving assembly 60 drives the valve core 56 to move in the valve inner cavity 55A, so as to realize the air flow direction in the air path structure 96 at the air inlet and outlet 18 from the outside to the cooking space 32.

[0203] That is, in the present application, the communication port opening and closing assembly 40 is moved into position no later than the valve core 56 is moved into position, so that the cooking space 32 first forms the required airflow passage structure and then adjusts the airflow direction.

[0204] In this embodiment, the intermediate power transmission device 70 is used to drive the valve core 56 and the push rod 41 to move in two different geometric dimensions. Figure 19 to Figure 20 As shown, the intermediate power transmission device 70 includes a first transmission surface 79 and a second transmission surface 71 .

[0205] The second transmission surface 71 is at least a part of the surface of the intermediate power transmission device 70, and the second transmission surface 71 is used to support the movable member 83 below the movable member 83. The second transmission surface 71 has a second transmission surface first end 71A and a second transmission surface second end 71B which are oppositely arranged along the second direction D2. The position of the second transmission surface first end 71A along the second direction is different from the position of the second transmission surface second end 71B along the second direction D2, that is, the second transmission surface 71 has a high end 71B and a low end 71A with a height difference in the second direction D2, and the high end 71B and the low end 71A have a distance in the horizontal direction. When the intermediate power transmission device 70 rotates, the height of the part of the second transmission surface 71 connected to the movable member 83 along the second direction D2 changes, so that the connecting port opening and closing assembly 40 moves along the second direction D2 through the connecting rod 62.

[0206] When the intermediate power transmission device 70 is in the decompression working state or the pressurization working state, the higher end of the second transmission surface 71, the second end portion 71B of the second transmission surface, supports the movable part 83 so that the second end 64 of the connecting rod is in a higher position, so that the first end 63 of the connecting rod is relatively located in a lower position, driving the push rod 41 to be located in a relatively lower blocking position; when the intermediate power transmission device 70 is in the ventilation working state, the lower end of the second transmission surface 71, the first end portion 71A of the second transmission surface, supports the movable part 83 so that the second end 64 of the connecting rod is in a lower position, so that the first end 63 of the connecting rod is relatively located in a higher position, so that the push rod 41 is located in a relatively higher open position. When the intermediate power transmission device 70 is in the pressure relief working state, the push rod 41 is located in a relatively high open position, so that the first end 63 of the connecting rod is located in a higher position, and the second end 64 of the connecting rod is relatively located in a lower position. At this time, the higher end of the second transmission surface 71, the second end portion 71B of the second transmission surface, supports the movable part 83, and the second end 64 of the connecting rod overcomes the elastic force of the pressure relief spring and drives the base part 81 to be located in a relatively low pressure relief position.

[0207] The first transmission surface 79 is another part of the circumferential surface of the intermediate power transmission device 70, and is used to connect to and act on the airflow reversing device 50. Different positions along the circumference of the first transmission surface 79 have different radial distances from the rotation axis. Therefore, the first transmission surface 79 protrudes outward in the radial direction, so that when the intermediate power transmission device 70 rotates, the first transmission surface 79 changes the distance between the valve core 56 and the rotation axis extending in the second direction D2, that is, the valve core 56 moves in the first direction D1, and the airflow channel inside the reversing valve 50 is switched.

[0208] It can be understood that, in the projection of the intermediate power transmission device 70 along the second direction, the second transmission surface 71 is located in the first area along the circumferential direction of the intermediate power transmission device 70, and the first transmission surface 79 is located in the second area along the circumferential direction of the intermediate power transmission device 70. The first area and the second area at least partially overlap or do not overlap each other. The first transmission surface 79 and the second transmission surface 71 act on the valve core 56 and the movable part 83 respectively in two geometric dimensions. In some embodiments, the planes where the first transmission surface 79 and the second transmission surface 71 act are perpendicular to each other.

[0209] The power supply device 61 is configured as a motor. The motor is fixed to the liner cover 12, for example, by a motor mounting portion. The intermediate power transmission device 70 is configured to be rotatable around a rotation axis extending in a vertical direction (i.e., the second direction D2) under the drive of the motor, and the intermediate power transmission device 70 has different radial dimensions in a horizontal direction (i.e., the first direction D1). The circumferential surface of the intermediate power transmission device 70 is connected to and acts on the valve core 56 to move the valve core 56 relative to the valve body 55 in a horizontal direction (i.e., the first direction D1).

[0210] Specifically, Figure 19 to Figure 20 As shown, the intermediate power transmission device 70 includes a transmission portion 72 , a protruding portion 73 and a sloped portion 74 .

[0211] The transmission part 72 is connected to the output shaft of the motor and can rotate under the drive of the motor. The transmission part 72 is generally configured as a cylinder. The rotation axis of the transmission part 72 extends along the second direction D2. The rotation axis of the transmission part 72 is also the central axis of its cylinder. Fig. 20 As shown, the circumferential surface of the transmission part 72 (i.e., the circumferential surface of its cylinder) includes a first circumferential surface 75, a second circumferential surface 76, a third circumferential surface 77, and a fourth circumferential surface 78 arranged in sequence along the circumferential direction. The protrusion 73 is provided to the second circumferential surface 76 and protrudes outwardly in the radial direction of the cylinder. The inclined surface 74 is provided to the fourth circumferential surface 78 and protrudes outwardly in the radial direction of the cylinder. It can be understood that the radial dimension of the intermediate power transmission device 70 at the protrusion 73 is greater than the radial dimension at the first circumferential surface 75 and the third circumferential surface 77. The protrusion 73 and the inclined surface 74 are separated by the first circumferential surface 75 and the third circumferential surface 77 on both sides, or the first circumferential surface 75 and the third circumferential surface 77 are located between the protrusion 73 and the inclined surface 74. The axial end surface of the inclined surface 74 is configured as a second transmission surface 71.

[0212] When the outer peripheral surface of the protrusion 73 contacts the valve core 56, the valve core 56 is located at the second ventilation position relative to the valve body 55, and at the same time, one of the higher end 71B and the lower end 71A of the second transmission surface 71 supports the movable member 83. When the protrusion 73 contacts the valve core 56, the valve core 56 is located at the first ventilation position relative to the valve body 55, and at the same time, the higher end 71B of the second transmission surface 71 supports the movable member 83. When the third circumferential surface 77 contacts the valve core 56, the valve core 56 is located at the second ventilation position relative to the valve body 55, and at the same time, the other of the higher end 71B and the lower end 71A of the second transmission surface 71 supports the movable member 83.

[0213] As before, depending on the connection relationship between the four vents (51, 52, 53, 54) of the reversing valve 50 and the air inlet and outlet (93, 94) of the air pump 95, as well as the connecting port 17 and the air inlet and outlet 18, when the valve core 56 is located at the second vent position, the air path structure 96 is in one of the states where the air flows from the air inlet and outlet 18 into the cooking space 32 and flows out of the cooking space 32, and when the valve core 56 is located at the first vent position, the air path structure 96 is in another of the states where the air flows from the air inlet and outlet 18 into the cooking space 32 and flows out of the cooking space 32. In addition, based on the four air pressure states of the cooking space 32, the connecting port 17 needs to be blocked in the second air pressure state and the third air pressure state, and the connecting port 17 needs to be opened in the first air pressure state. In order to simplify the control, in the present application, when the protrusion 73 contacts the valve core 56, the higher end 71B of the second transmission surface 71 supports the movable member 83, thereby sealing the cooking space 32. According to the specific setting of the gas path structure 96, one of the second gas pressure state (negative pressure) and the third gas pressure state (positive pressure) can be achieved. On this basis, when one of the first circumferential surface 75 and the third circumferential surface 77 contacts the valve core 56, the other of the second gas pressure state (negative pressure) and the third gas pressure state (positive pressure) is achieved. When the other of the first circumferential surface 75 and the third circumferential surface 77 contacts the valve core 56, the first gas pressure state is achieved. It can be understood that the first gas pressure state only requires the communication port 17 to be opened, so that the cooking space 32 is connected to the external environment. At this time, no matter what the airflow direction in the gas path structure 96 is, when the airflow generating device 95 is working, it will bring cold air into the cooking space 32.

[0214] In the illustrated embodiment, the lower end 71A of the second transmission surface 71 is close to the third circumferential surface 77, and the higher end 71B of the second transmission surface 71 is close to the first circumferential surface 75. Fig. 20 It can be clearly seen that the fourth circumferential surface 78 occupies approximately half of the outer circumferential surface of the transmission portion 72, that is, the inclined portion 74 extends approximately 180 degrees in the circumferential direction. The lower end 71A of the second transmission surface 71 is circumferentially spaced about 160 to 180 degrees from the first circumferential surface 75, the upper end 71B of the second transmission surface 71 is circumferentially spaced about 160 to 180 degrees from the protrusion 73, and the upper end 71B of the second transmission surface 71 is circumferentially spaced about 160 to 180 degrees from the third circumferential surface 77.

[0215] The motor drives the transmission part 72 to rotate. When the intermediate power transmission device 70 is in the ventilation working state, the first circumferential surface 75 of the transmission part 72 contacts the valve core 56 of the reversing valve 50, so that the valve core 56 extends out of the valve inner cavity 55A, so that the reversing valve 50 (specifically the valve core 56) is located at the second ventilation position relative to the cover body 10, and the lower end 71A of the second transmission surface 71 supports the movable member 83; when the intermediate power transmission device 70 is in the decompression working state, the protrusion 73 contacts the valve core 56 of the reversing valve 50 and pushes the valve core 56 into the valve inner cavity 55A, so that the reversing valve 50 (specifically the valve core 56) is located at the second ventilation position relative to the cover body 10. When the intermediate power transmission device 70 is in the pressurizing working state, the third circumferential surface 77 of the transmission part 72 contacts the valve core 56 of the reversing valve 50, so that the valve core 56 extends out of the valve inner cavity 55A, so that the reversing valve 50 (specifically the valve core 56) is located in the first venting position relative to the cover body 10, and the higher end 71B of the second transmission surface 71 supports the movable part 83. When the intermediate power transmission device 70 is in the pressure relief working state, the first circumferential surface 75 of the transmission part 72 contacts the valve core 56 of the reversing valve 50, so that the valve core 56 extends out of the valve inner cavity 55A, so that the reversing valve 50 (specifically the valve core 56) is located in the second venting position relative to the cover body 10, and the higher end 71B of the second transmission surface 71 supports the movable part 83. It can be understood that the length of the high end 71B along the circumferential direction is greater than the length of the low end 71A along the circumferential direction.

[0216] The intermediate power transmission device 70 is equivalent to a cam structure. The transmission portion 72, the protruding portion 73 and the inclined portion 74 can be formed integrally, so that the intermediate power transmission device 70 is a single component.

[0217] Preferably, the cooking appliance 100 further comprises a position detection device 97. The position detection device 97 is connected to the intermediate power transmission device 70 and is used to detect the position of the intermediate power transmission device 70 relative to the cover body 10. For example, the position detection device 97 is at least used to send a positioning signal when the intermediate power transmission device 70 moves relative to the cover body 10 to a position corresponding to the ventilation working state, the pressurization working state and the decompression working state. The position detection device 97 is electrically connected to the control device, so that the control device can accurately control the movement position of the intermediate power transmission device 70 through the position detection device 97, so that the intermediate power transmission device 70 is accurately in the ventilation working state, the pressurization working state or the decompression working state. Optionally, the position detection device 97 uses an optical coupling element (photoelectric switch), a micro switch or a proximity switch to locate the rotation angle of the intermediate power transmission device 70, so that the transmission part 72 can accurately stay at the decompression working angle, the pressurization working angle or the ventilation working angle. In the present application, the photoelectric switch, the micro switch and the proximity switch can be used alone or in combination.

[0218] The following describes the braking method of the driving assembly 60 on the pressure limiting device 80 in the pressure release position.

[0219] Those skilled in the art will appreciate that the present application is not limited to the above preferred embodiments. For example, the airflow generating device 95 such as an air pump of the cooking appliance 100 can be used only to generate negative pressure in the cooking space 32 during the heat preservation stage, and in this case, there is no need to provide an airflow reversing device and a driving assembly 60.

[0220] Unless otherwise defined, the technical and scientific terms used herein have the same meaning as those generally understood by those skilled in the art in the technical field of this application. The terms used herein are only for describing specific implementation purposes and are not intended to limit this application. Terms such as "setting" appearing in this article can mean that one component is directly attached to another component, or that one component is attached to another component through an intermediate. Features described in this article in one embodiment may be applied to another embodiment alone or in combination with other features, unless the feature is not applicable in the other embodiment or otherwise specified.

[0221] The present application has been described through the above-mentioned embodiments, but it should be understood that the above-mentioned embodiments are only for the purpose of example and description, and are not intended to limit the present application to the described embodiments. It can be understood by those skilled in the art that more variations and modifications can be made according to the teachings of the present application, and these variations and modifications all fall within the scope of protection claimed in the present application.

Claims

1. A cooking utensil, characterized in that: include: The pot body includes a pot for containing food; as well as A cover body, the cover body can be opened and closed on the pot body to form a cooking space between the cover body and the pot body, and the cover body is provided with a connecting port for connecting the cooking space with the outside; a communication port opening and closing assembly, the communication port opening and closing assembly being connected to the cover body and movable between an open position and a blocked position relative to the communication port, and being used for opening or blocking the communication port, thereby realizing opening or closing the cooking space; A driving component, used for providing driving force; A pressure limiting device is provided between the driving assembly and the communication port opening and closing assembly to transmit the driving force of the driving assembly to the communication port opening and closing assembly, thereby driving the communication port opening and closing assembly to move between the open position and the blocked position, wherein: When the pressure in the cooking space reaches a preset value, the communication port opening and closing assembly can overcome the driving force and move to an open position under the action of the pressure, so that the pressure in the cooking space is not higher than the preset value.

2. The cooking device according to claim 1, characterized in that: The pressure limiting device comprises: A base member and a movable member, wherein the base member and the movable member can move relative to each other between an initial position and a pressure relief position; The base member is connected to the communication port opening and closing assembly, and the movable member is connected to the driving assembly.

3. The cooking device according to claim 2, characterized in that: The driving component drives the pressure limiting device in the initial position to move, thereby driving the communication port opening and closing component to move between the open position and the blocked position.

4. The cooking device according to claim 2, characterized in that: When the pressure in the cooking space reaches a preset value, the communication port opening and closing assembly can move toward the open position under the action of the pressure, so that the base member can move toward the pressure relief position relative to the movable member.

5. The cooking device according to any one of claims 1 to 4, characterized in that: It also includes a connecting rod, which is constructed to be rotatable relative to the cover body around a first axis. The connecting rod includes a first connecting rod end and a second connecting rod end that are opposite along the length direction of the connecting rod. The first connecting rod end is connected to the connecting port opening and closing assembly, and the second connecting rod end is connected to the pressure limiting device.

6. The cooking device according to claim 2, characterized in that: The base member is constructed as a hollow tubular structure, and the movable member is movably sleeved on the base member along the axial direction of the movable member.

7. The cooking device according to claim 6, characterized in that: The movable member comprises a movable member first end and a movable member second end which are arranged oppositely along the axial direction of the movable member. The movable member first end extends out of the base member and is connected to the driving assembly.

8. The cooking device according to claim 7, characterized in that: The first end of the movable member is provided with a valve core flange protruding outwardly in the radial direction, and the base member is provided with a valve body flange protruding inwardly in the radial direction, and the valve body flange is closer to the drive assembly than the valve core flange; wherein, When the movable member is in an initial position, the valve core flange abuts against the valve body flange.

9. The cooking device according to claim 2 or 7, characterized in that: The pressure limiting device also includes: A biasing member is disposed between the movable member and the base member, and the biasing member biases the base member and the movable member toward each other so that the base member and the movable member are stabilized at an initial position.

10. The cooking appliance according to claim 9, characterized in that The biasing member is an elastic restoring element, one end of which is connected to an end of the base member away from the driving assembly, and the other end of which is connected to an end of the movable member close to the driving assembly.

11. The cooking device according to claim 10, characterized in that: The base member is provided with a limiting member, and the limiting member is used to limit the compression amount of the biasing member.

12. The cooking device according to claim 11, characterized in that: The limiting member is an adjusting nut; The inner wall of the base member is provided with a thread, and the limiting member is engaged with the thread.

13. The cooking appliance according to claim 10, characterized in that The biasing member is always in a compressed state.

14. The cooking appliance according to claim 1, characterized in that The cooking appliance further comprises a pressure regulating assembly, which is used for blowing air into the cooking space and forming a positive pressure in the cooking space.

15. The cooking device according to claim 1 or 14, characterized in that: The cover body is provided with a vent for communicating with the cooking space; The pressure regulating assembly includes an air path structure capable of communicating with the vent, the communication port and the atmosphere respectively, and the air path structure includes: An airflow generating device is connected to the cooking space through the vent and is used to generate a unidirectional airflow at the vent.

16. The cooking appliance according to claim 15, characterized in that The vent is an air inlet and outlet; The gas path structure also includes: An airflow reversing device is used to realize airflow reversal in the air path structure.

17. The cooking appliance according to claim 16, characterized in that The airflow reversing device is a reversing valve, which is used to change the flow direction of the fluid flowing therethrough, so that the airflow can flow into or out of the cooking space from the vent.

18. The cooking appliance according to claim 17, characterized in that It comprises a valve inner cavity and a valve core, wherein the valve core is arranged in the valve inner cavity and can move therein to switch the air flow channel inside the air flow reversing device; The cooking device is constructed as follows: At the same time or after the communication port opening and closing component blocks the communication port, the driving component drives the valve core to move in the valve inner cavity, so that the air flow direction in the air path structure at the air vent is from the cooking space to the outside; When or after the connecting port opening and closing assembly opens the connecting port, the driving assembly drives the valve core to move in the valve cavity, so that the air flow direction in the air path structure at the vent is from the outside to the cooking space.

19. The cooking appliance according to claim 16, characterized in that The driving assembly is used to drive the communication port opening and closing assembly and the airflow reversing device to act accordingly, so that when the driving assembly acts, the communication port opening and closing assembly and the airflow reversing device act synchronously or in conjunction with each other.

20. The cooking appliance according to claim 19, characterized in that The driving assembly includes a power supply device and an intermediate power transmission device connected thereto, wherein the intermediate power transmission device is connected to the connecting port opening and closing assembly and the airflow reversing device, and is used to transmit the driving force of the power supply device to the connecting port opening and closing assembly and the airflow reversing device.

21. The cooking appliance according to claim 20, characterized in that The intermediate power transmission device is configured to be rotatable around a rotation axis extending in the second direction under the drive of the power supply device, and the intermediate power transmission device includes: a first transmission surface, which is at least a portion of a circumferential surface of the intermediate power transmission device, and is used to connect to and act on the airflow reversing device, and different positions along the circumference of the first transmission surface have different radial distances from the rotation axis; and The second transmission surface is a part of the surface of the intermediate power transmission device, used to connect to and act on the pressure limiting device, the second transmission surface has a second transmission surface first end and a second transmission surface second end arranged oppositely along the circumference of the intermediate power transmission device, and the position of the second transmission surface first end along the second direction is different from the position of the second transmission surface second end along the second direction.

22. The cooking appliance according to claim 21, characterized in that In the projection of the intermediate power transmission device along the second direction, the second transmission surface is located in a first circumferential region of the intermediate power transmission device, and the first transmission surface is located in a second circumferential region of the intermediate power transmission device, and the first region and the second region at least partially overlap or do not overlap with each other.

23. The cooking appliance according to claim 22, characterized in that The second transmission surface further includes a second transmission surface middle portion located between the second transmission surface first end portion and the second transmission surface second end portion, and a position of the second transmission surface middle portion along the second direction varies with a circumferential position of the second transmission surface middle portion.

24. The cooking appliance according to claim 21, characterized in that The intermediate power transmission device comprises: a transmission part, the transmission part being configured to be rotatable around the rotation axis, at least a portion of an outer peripheral surface of the transmission part being configured to be arc-shaped, and the rotation axis passing through a center of the arc; a protrusion connected to the arc-shaped circumferential surface of the transmission portion and protruding outward in a radial direction of the arc; and an inclined portion, the inclined portion being connected to the transmission portion and provided with the second transmission surface; The outer circumferential surface of the protrusion and a portion of the arcuate circumferential surface of the transmission part that is circumferentially adjacent to the protrusion constitute the first transmission surface.

25. The cooking appliance according to claim 24, characterized in that The second transmission surface is provided on an axial end surface of the sloped portion.

26. The cooking appliance according to claim 20, characterized in that The power supply device is configured as a motor.

27. The cooking appliance according to claim 1, characterized in that The cover body is provided with a push rod through hole; The connecting port opening and closing assembly includes a push rod assembly, which is arranged in the push rod through hole, wherein the pressure limiting device is connected to and acts on the push rod assembly, so that the push rod assembly is movable between a blocking position and an open position relative to the push rod through hole, and the push rod assembly includes a first end of the push rod assembly and a second end of the push rod assembly arranged oppositely along a second direction, wherein when the push rod assembly is in the blocking position, the first end of the push rod assembly blocks the connecting port, and when the push rod assembly is in the open position, the first end of the push rod assembly opens the connecting port.

28. The cooking appliance according to claim 27, characterized in that The second end of the push rod assembly is provided with a push rod flange protruding outward in the radial direction, and the radial dimension of the push rod flange is larger than the radial dimension of the push rod through hole; The communication port opening and closing assembly further comprises a push rod spring, which is sleeved on the outer periphery of the second end portion of the push rod assembly and is located between the push rod flange and the cover body.

29. The cooking appliance according to claim 27, characterized in that A sealing member is provided at one end of the push rod through hole facing the communication port, and the sealing member is in sealing contact with the push rod assembly.

Images