Detachable cover assembly, cover body and electric heating pressure cooking utensil

Abstract

The utility model discloses a detachable cover assembly, a cover body and an electric heating pressure cooking utensil, the detachable cover assembly comprises a cover plate and a radiant panel, the lower surface of the cover plate forms the upper top surface of a pressure cooking cavity, the radiant panel is used for radiating infrared rays to the pressure cooking cavity after being heated, the radiant panel is connected to the side, facing the pressure cooking cavity, of the cover plate, and the radiant panel is used for radiating infrared rays to the pressure cooking cavity after being heated. And a gap through which gas can pass is formed between the upper surface of the radiant panel and the lower surface, forming the upper top surface of the pressure cooking cavity, of the cover plate. According to the pressure cooking device, the radiant panel generating infrared rays is arranged in the pressure cooking cavity, gas in the pressure cooking cavity can flow in the gap between the radiant panel and the cover plate, the radiant panel can be prevented from bearing pressure, and the technical problem that the pressure bearing effect of materials of the radiant panel is poor due to the fact that the peripheral side of the radiant panel is not evenly pressed in all directions can be solved.

Description

Technical Field

[0001] This application relates to the technical field of kitchen appliances, and more specifically to a detachable lid assembly, a lid body, and an electric heating pressure cooking appliance. Background Technology

[0002] Existing electric pressure cookers, such as electric pressure rice cookers, typically have a heating element and a removable lid assembly. The heating element heats the lid of the removable assembly. Some cookers use a metal plate lid; heat from the heating element is transferred to the metal plate, raising its temperature. This high temperature then heats the pressure cooking chamber, resulting in poor food preparation. Other cookers use a radiant plate lid; heat from the heating element is transferred to the radiant plate, causing it to emit infrared radiation. This infrared radiation is then used to heat the food. However, the material of radiant plates results in poor pressure resistance; they often crack under pressure and are unsuitable for pressure cooking appliances.

[0003] Therefore, there is a need for a detachable lid assembly, a lid body, and an electric pressure cooking appliance to at least partially solve the above problems. Utility Model Content

[0004] The description of this utility model introduces a series of simplified concepts, which will be further explained in detail in the detailed description section. This description is not intended to limit the key features and essential technical features of the claimed technical solution, nor is it intended to determine the scope of protection of the claimed technical solution.

[0005] To at least partially solve the above problems, this application provides a removable lid assembly for a lid of a cooking appliance, the electric pressure cooking appliance including a pot body and the lid body, the lid body being openable and closable on the pot body to form a pressure cooking chamber between the lid body and the pot body, the removable lid assembly comprising:

[0006] A cover plate, the lower surface of which forms the upper top surface of the pressure cooking chamber; and

[0007] A radiant plate is used to radiate infrared rays into the pressure cooking chamber after being heated. The radiant plate is connected to the side of the cover plate facing the pressure cooking chamber, and a gas-passable gap is formed between the upper surface of the radiant plate and the lower surface of the cover plate that constitutes the top surface of the pressure cooking chamber.

[0008] According to this solution, the pressure cooking chamber is equipped with a radiation plate that generates infrared rays. During the cooking process, the radiation plate radiates infrared rays into the pressure cooking chamber, which can improve heat utilization efficiency, effectively heat the food, make the food heat evenly, stimulate the aroma of the food, and make the food more delicious. After the cooking process, the radiation plate can also generate infrared rays to keep the food warm.

[0009] There is no seal between the radiant plate and the cover plate, allowing gas within the pressure cooking chamber to flow through the gap between them. When there is gas pressure within the pressure cooking chamber, the cover plate, which forms the top wall of the chamber, can withstand the pressure, while the radiant plate inside the chamber does not. Therefore, the material for the radiant plate can be selected primarily to enhance far-infrared radiation without being overly influenced by material strength. Lower-cost materials can be chosen for the radiant plate. Thus, by utilizing the gap between the radiant plate and the cover plate, the radiant plate itself avoids bearing pressure, solving the technical problem of uneven pressure distribution on its periphery, which leads to poor pressure-bearing capacity of the material.

[0010] Because the cover plate bears the pressure inside the pressure cooking chamber, and the pressure inside the pressure cooking chamber is adjustable, for example, between 10Kpa and 110Kpa, the radiant plate, which does not bear pressure, will not crack even under high-pressure cooking conditions. Even if the radiant plate cracks due to accidental impact during use, the cover plate bearing the pressure will prevent the electric pressure cooking appliance from exploding or causing safety issues that could injure consumers, thus ensuring higher product safety.

[0011] Furthermore, the radiant heat plate can be detached from the lid along with the removable cover assembly, facilitating cleaning after use. On another front, this design allows the radiant heat plate to be positioned closer to the food inside the pressure cooking chamber, enabling designers to test and optimize the distance by shortening the infrared radiation distance to the food. Generally, shortening the radiation distance can improve the intensity and efficiency of heat radiation, minimize energy loss, enhance the radiation effect on food, and better stimulate aroma compounds, thereby improving the product's market competitiveness.

[0012] Optionally, the radiant plate is detachably connected to the cover plate, and in the connected state, the upper surface of the radiant plate is in partial contact with the lower surface of the cover plate that constitutes the top surface of the pressure cooking chamber.

[0013] According to this design, the radiant plate can be detached from the removable cover assembly. After separation, the radiant plate can be cleaned independently, and the lower surface of the cover, unobstructed by the radiant plate, can also be cleaned. This design greatly facilitates cleaning operations after using the appliance. Because the radiant plate is in partial contact with the cover, when the cover is heated, the heat from the heated cover is transferred to the radiant plate via contact heat conduction. The design incorporates a small gap between the cover and the radiant plate. To achieve good heat transfer and gas flow, the designer can specifically design this small gap, such as an air guide channel. Alternatively, it can be designed according to standard manufacturing processes, creating a small gap between the two surfaces that allows gas flow even in the assembled state. The partial contact and gap between the radiant plate and the cover allow heat from the heated cover to be transferred to the radiant plate via a combination of radiant and contact heat conduction.

[0014] Optionally, a connector is fixedly provided on the cover plate, and a connecting part is provided on the radiating plate. The radiating plate is detachably connected to the cover plate through the connector and the connecting part.

[0015] According to this scheme, the radiant plate can be fixed to the connector of the cover plate, and the connector provides an upward support force to the radiant plate.

[0016] Optionally, the radiating plate is connected to the cover plate by at least one fastening component.

[0017] According to this solution, the connection structure using fastening components can provide strong support for the radiant plate, and the assembly process is simple; the radiant plate and the cover plate can be connected by simply locking the fastening components together.

[0018] Optionally, the fastening assembly is located in the middle of the radiating plate.

[0019] According to this plan, the radiant panel will be able to remain more stably on the cover plate.

[0020] Optionally, the fastening assembly includes a screw component and a nut component, the radiating plate is provided with a mounting hole, the screw component is fixed to the cover plate and passes through the mounting hole, and the nut component is screwed to the screw component from the underside of the radiating plate.

[0021] According to this design, the radiating plate is sandwiched between the cover plate and the nut component. The nut component supports the radiating plate upwards and provides it with strong support. Furthermore, the disassembly and installation of the radiating plate are simple and easy to operate.

[0022] Optionally, the cover plate has an upwardly recessed first clearance portion, and the top portion of the fastening assembly is located in the recess of the clearance portion and is fixedly connected to the clearance portion.

[0023] According to this solution, the connection between the fastening assembly and the cover plate is more stable, while avoiding gaps between the radiant plate and the cover plate at the fastening assembly. The radiant plate can conduct heat with the cover plate at the fastening assembly.

[0024] Optionally, the radiant plate is substantially parallel to the main body of the cover plate. This reduces the distance between the radiant plate and the food inside the pressure cooking chamber, further shortening the infrared radiation distance to the food. Alternatively, the cover plate has an upwardly recessed receiving portion, within which the radiant plate is located. This restricts the horizontal movement of the radiant plate, preventing wobbling; and the shapes of the receiving portion and the radiant plate can be adapted to fit each other. For non-circular radiant plates, this facilitates positioning during assembly and prevents reverse installation.

[0025] Optionally, the removable cover assembly further includes a positioning member, which is connected to the cover plate and protrudes from the lower surface of the cover plate. The radiating plate is provided with a positioning hole, and the positioning member passes through the positioning hole.

[0026] According to this solution, the radiant panel can be positioned during assembly to prevent it from being installed backwards or improperly, and its position can be restricted after assembly to prevent it from shaking.

[0027] Optionally, the lower surface of the radiating plate has a textured surface. This increases the surface area of ​​the radiating plate, allowing for better infrared radiation emission and providing a degree of non-stick properties. Alternatively, the lower surface of the radiating plate may be printed with a pattern. When the cover is opened, the consumer can observe the pre-set pattern through the radiating plate, thus enhancing the product's visual appeal.

[0028] According to another aspect of this application, a lid for an electric pressure cooking appliance is provided, the electric pressure cooking appliance including a pot body and the lid, the lid being closably disposed on the pot body to form a pressure cooking chamber between the lid and the pot body, the lid including a lid body and a detachable lid assembly as described in any of the above aspects, which is detachably connected to the lid body in the form of an assembly.

[0029] According to this design, the removable cover assembly within the lid features a suspended radiant plate. This radiant plate can be detached from the lid along with the removable cover assembly, greatly facilitating cleaning after use. The radiant plate can be designed to be closer to the food inside the pressure cooking chamber, thereby shortening the infrared radiation distance to the food and enhancing the stimulating effect of infrared rays on aroma compounds in the food.

[0030] Optionally, the cover further includes a heating assembly for heating the radiant plate, the heating assembly being located on the upper side of the removable cover assembly and abutting against the cover plate.

[0031] According to this solution, the heating component is in contact with the cover plate, so that heat is transferred from the heating component to the cover plate through contact heat conduction, and then transferred to the radiant plate through the heated cover plate. The heat transfer efficiency is high, which enables the radiant plate to heat up quickly.

[0032] Optionally, the heating component may float relative to the removable cover assembly in directions toward and away from the removable cover assembly.

[0033] According to this solution, the floating heating element can avoid the existence of installation gaps, allowing the heating element to abut against the cover plate from the side of the cover plate away from the cooking cavity.

[0034] Optionally, the cover includes an elastic element that applies a biasing force to the heating assembly to keep the heating assembly abutting against the cover.

[0035] According to this scheme, the heating component remains in contact with the cover plate, so that heat is transferred from the cover plate to the radiant plate through thermal conduction.

[0036] Optionally, the cover also includes a liner, with the heating assembly located below the liner and vertically movably connected to it.

[0037] According to this design, the position of the heating element relative to the liner is variable, allowing the heating element to float.

[0038] Optionally, the heating assembly includes a heating plate and a heating element disposed on the upper surface of the heating plate. The heating plate has a second recessed relief portion, and the first relief portion of the cover plate protrudes from the upper surface of the cover plate and is located in the recess of the second relief portion.

[0039] According to this solution, the removable cover component can be positioned during assembly to prevent it from being installed backwards or improperly, and the position of the removable cover component can be restricted after assembly to prevent it from shaking.

[0040] Optionally, the cover includes a pressure control device having an exhaust passage for communication with the pressure cooking chamber.

[0041] According to this scheme, the pressure cooking chamber can have a certain gas pressure, thus constituting an electric pressure cooking appliance.

[0042] Optionally, the pressure control device is fixed to the cover plate so as to be detached from the cover body together with the removable cover assembly.

[0043] According to this solution, the exhaust channel of the pressure control device can be cleaned, and the installation and replacement of the pressure control device can be facilitated.

[0044] Optionally, the cover includes a liner, a heating assembly, and a heat insulation member, wherein the heat insulation member is disposed between the heating assembly and the liner, and the heating assembly is connected to the liner through the heat insulation member.

[0045] According to this solution, heat radiation can be prevented from reaching heat-sensitive components inside the cover, such as the light panel, thus avoiding affecting the function of these components.

[0046] According to another aspect of this application, a cooking appliance is provided, the electric pressure cooking appliance comprising a pot body and a lid as described above, the lid being closably disposed on the pot body to form a pressure cooking chamber between the lid and the pot body, the radiant plate having a first area S1 in an extension direction with respect to the surface of the lid facing the pressure cooking chamber, the radiant plate being located below the pressure control device and the first area S1 covering at least the projected area of ​​the exhaust channel in the vertical projection direction.

[0047] According to this solution, the design of the radiant plate can be selected according to actual needs. Its placement below the pressure control device allows it to radiate far-infrared rays into the food in the pressure cooking chamber after heating, stimulating the food's aroma and preventing overflowing food from entering the exhaust channel and causing blockages and malfunctions. This design simultaneously solves the technical problems of food overflowing from the pressure cooking chamber and blocking the exhaust channel, as well as the poor pressure-bearing capacity of the radiant plate itself due to uneven pressure distribution in various directions.

[0048] Optionally, the ratio between the first area S1 of the radiant plate and the second area S2 of the cover plate located in the pressure cooking cavity is 0.35 to 1.

[0049] According to this design, the radiant plate occupies a larger area of ​​the cover plate. It has a larger area for receiving heat transfer from the cover plate and a larger area for radiating infrared rays into the pressure cooking chamber. This allows for more infrared radiation to reach the food inside the pressure cooking chamber, resulting in a stronger stimulation of aroma compounds in the food.

[0050] Optionally, the pot body includes an inner pot, the rim of the inner pot having a third area S3 on a horizontal plane, and the ratio of the first area S1 of the radiant plate to the third area S3 of the rim is 0.3 to 1.

[0051] According to this scheme, when the ratio of the area of ​​the radiant plate to the area of ​​the pot opening is above 0.3, the infrared radiation area radiated by the radiant plate is large enough to meet the heating requirements of the food. Attached Figure Description

[0052] The following drawings, which are incorporated herein by reference and used to understand this application, illustrate embodiments of the application and their descriptions, thereby explaining the principles of the application.

[0053] In the attached image:

[0054] Figure 1 A cross-sectional view of the cooking appliance according to this application;

[0055] Figure 2 for Figure 1 A perspective view of the cooking utensil shown, with the lid shown in an exploded state;

[0056] Figure 3 for Figure 1 An exploded three-dimensional view of the cross-section of the cover shown;

[0057] Figure 4 for Figure 1 An exploded perspective view of the cross-section of the removable cover assembly shown.

[0058] Figure 5 for Figure 1 An exploded three-dimensional cross-sectional view of the heating assembly and insulation component shown.

[0059] Figure 6 for Figure 4 A three-dimensional cross-sectional view of the screw component shown;

[0060] Figure 7 for Figure 4 A three-dimensional cross-sectional view of the nut component shown;

[0061] Figure 8 for Figure 1 A partial view of a portion of the cover at the screw assembly;

[0062] Figure 9 for Figure 1 A partial view of a portion of the cover at the pressure control device.

[0063] Explanation of reference numerals in the attached figures:

[0064] 1. Cooking utensils 2. Pot body

[0065] 3 lids 4 inner pots

[0066] 5. Heating device 5a. Bottom heating device

[0067] 5b Side heating device 6 Liner

[0068] 7-sided cover assembly with 8 through holes

[0069] 9. Main body of the lid; 10. Detachable lid assembly

[0070] 11 Cover plate 12 Removable cover base

[0071] 13. Boiler mouth sealing ring; 14. Radiation plate

[0072] 15 Mounting holes 16 Positioning components

[0073] 17 Positioning hole 18 First clearance part

[0074] 20 Heating components 21 Heating plate

[0075] 22 Heating element 23 Pin clip

[0076] 24 Second avoidance section 25 First mounting port

[0077] 26 Second installation port 30 Thermal insulation component

[0078] 31 Fixing post 32 Clip hole

[0079] 40 Pressure control device 41 Pressure valve

[0080] 42 Safety valve 43 Screw

[0081] 44 Elastic element 45 Connector

[0082] 46 Connecting part 47 First through hole

[0083] 48 Second via 49 Temperature measuring hole

[0084] 50 Fastening components 51 Screw components

[0085] 52 Nut component 53 Mounting base

[0086] 54 Positioning part 55 External thread

[0087] 56 Guide section 57 Guide surface

[0088] 60 Steam passage structure 61 Cover plate opening

[0089] 62 Steam valve 63 Steam seal

[0090] 64 Exhaust port 65 Mounting part

[0091] 71 User Interaction Area 72 Power Cord

[0092] 73 Pivot Shaft 74 Torsion Spring

[0093] P1 Exhaust passage, P2 Steam passage Detailed Implementation

[0094] The following description provides numerous specific details to offer a more thorough understanding of this application. However, it will be apparent to those skilled in the art that this application can be practiced without one or more of these details. In other instances, certain technical features well-known in the art have not been described to avoid confusion with this application.

[0095] To fully understand this application, a detailed description will be provided below. It is obvious that the implementation of embodiments of this application is not limited to the specific details familiar to those skilled in the art. Preferred embodiments of this application are described in detail below; however, other embodiments may also be available in addition to these detailed descriptions.

[0096] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms “comprising” and / or “including” are used in this specification, they indicate the presence of the stated features, integrals, steps, operations, elements, and / or components, but do not exclude the presence or addition of one or more other features, integrals, steps, operations, elements, components, and / or combinations thereof.

[0097] Ordinal numbers such as “first” and “second” used in this application are merely identifiers and have no other meaning, such as a specific order. Moreover, for example, the term “first component” does not imply the existence of a “second component”, and the term “second component” does not imply the existence of a “first component”.

[0098] It should be noted that the terms “up,” “down,” “front,” “back,” “left,” “right,” “inner,” “outer,” and similar expressions used in this article are for illustrative purposes only and are not intended to be restrictive.

[0099] Exemplary embodiments according to this application will now be described in more detail with reference to the accompanying drawings. However, these exemplary embodiments may be implemented in many different forms and should not be construed as being limited to the embodiments set forth herein. It should be understood that these embodiments are provided so that the disclosure of this application is thorough and complete, and that the concept of these exemplary embodiments is fully conveyed to those skilled in the art.

[0100] like Figure 1 and Figure 2As shown, this application provides an electric pressure cooking appliance 1, which includes a pot body 2 and a lid 3. The pot body 2 has a cylindrical inner pot storage section. The inner pot 4 can be fixedly installed in the inner pot storage section, or can be freely placed into or removed from the inner pot storage section for easy cleaning. The inner pot 4 is usually made of metal and has a circular opening on its upper surface for holding materials to be heated, such as rice or soup. The pot body 2 includes a heating device 5, such as a heating plate, for heating the inner pot 4.

[0101] It is understood that the electric pressure cooking appliance 1 according to this application can be an electric pressure rice cooker, an electric pressure cooker or other electric pressure cooking appliances, and the electric pressure cooking appliance 1 can have various functions such as cooking porridge in addition to cooking rice.

[0102] The lid 3 has a shape that substantially corresponds to the pot body 2. The lid 3 is closable on the pot body 2; specifically, it is pivotally connected to the pot body 2 via a pivot axis 73 and can freely pivot about the pivot axis 73 between a closed position and an open position relative to the pot body 2, facilitating the closing and opening of the pot body 2. When the lid 3 is closed on the pot body 2, it covers the inner pot 4, forming a pressure cooking chamber between them. The lid 3 typically also has a pot opening sealing ring 13, which can be made of, for example, rubber material, and is positioned between the lid 3 and the inner pot 4 to seal the pressure cooking chamber when the lid 3 is closed.

[0103] It should be noted that the directional terms used in this article to describe the various parts and components of the electric pressure cooking appliance 1, such as "up", "down", "above", "below", "upward", "downward", "facing upward", and "facing downward", are relative to the electric pressure cooking appliance 1 when it is placed horizontally and upright.

[0104] like Figure 1 and Figure 2 As shown, the heating device 5 inside the pot includes a bottom heating device 5a and a side heating device 5b. The bottom heating device 5a is located on the lower side of the inner pot 4 and can be an electric heating device, an electromagnetic heating device, etc. The side heating device 5b corresponds to the side of the inner pot 4 and can be an electric heating device, an electromagnetic heating device, etc. The rear end of the pot body 2 is also provided with a power cord 72 with a plug, which connects to an external power source. A torsion spring 74 can be fitted on the pivot shaft 73 to facilitate automatic lid opening.

[0105] like Figure 2 and Figure 3As shown, the cover 3 mainly includes an inner liner 6, a faceplate assembly 7, and a removable cover assembly 10. The inner liner 6 and the faceplate assembly 7 constitute the cover body 9. The removable cover assembly 10 is located on the lower side of the cover body 9 and is detachably connected to the cover body 9 in the form of an assembly. Specifically, the faceplate assembly 7 is located on the upper side or outer side of the inner liner 6 and can cover the inner liner 6. The upper surface of the faceplate assembly 7 is provided with a user interaction area 71 for user operation. The inner liner 6 can be connected to the faceplate assembly 7 by a suitable method such as snap-fit, fastener connection such as screws 43, or adhesive bonding. The removable cover assembly 10 is located on the lower side or inner side of the inner liner 6 and is detachably connected to the inner liner 6. The removable cover assembly 10 is movably connected to the inner liner 6 by a plug-in and / or snap-fit ​​structure. When it is necessary to clean the removable cover assembly 10, the removable cover assembly 10 can be removed from the cover 3.

[0106] The removable lid assembly 10 mainly includes a lid plate 11, an annular removable lid seat 12, and the aforementioned pot opening sealing ring 13. The lid plate 11 may be a metal plate capable of withstanding a certain gas pressure. Most of the lower surface of the lid plate 11 forms the upper top surface of the pressure cooking chamber. The removable lid seat 12 allows the lid plate 11 to be detachably connected to the liner 6. The lid plate 11 can be fastened to the removable lid seat 12 by other suitable means such as snaps or fasteners. A portion of the pot opening sealing ring 13 is pressed between the lid plate 11 and the removable lid seat 12.

[0107] To enhance the cooking effect, the removable cover assembly 10 also includes a radiant plate 14, which radiates infrared rays, such as far-infrared rays, into the pressure cooking chamber after being heated. During cooking, the radiant plate 14 radiates infrared rays into the pressure cooking chamber, improving heat utilization efficiency, effectively heating the food, ensuring even heating, enhancing aroma, and making the food more delicious. After cooking, the radiant plate 14 can also generate infrared rays to keep the food warm. The radiant plate 14 can be a ceramic plate, a carbon plate made of carbon materials, etc.

[0108] To heat the radiant plate 14, the cover 3 also includes a heating assembly 20 for heating the radiant plate 14. The heating assembly 20 is located below the liner 6 and can be connected to the liner 6. The heating assembly 20 includes a heating plate 21 and a heating element 22 disposed on the upper surface of the heating plate 21. The heat generated by the heating element 22 can be transferred downward through the heating plate 21 and to the radiant plate 14 to raise the temperature of the radiant plate 14.

[0109] In this embodiment, the radiant plate 14 can be connected to the side of the cover plate 11 facing the pressure cooking chamber, specifically the lower side. The radiant plate 14 can be detached from the cover body 3 along with the removable cover assembly 10, facilitating cleaning after use. This design also allows the radiant plate 14 to be closer to the food inside the pressure cooking chamber, shortening the infrared radiation distance to the food. Generally, shortening the radiation distance can improve the intensity and efficiency of heat radiation to a certain extent, avoid energy loss, enhance the radiation effect on food, and better stimulate the aroma substances in the food, thereby improving the product's market competitiveness.

[0110] The radiant plate 14 is disposed within the pressure cooking chamber, specifically suspended at the top of the pressure cooking chamber. A gas-permeable gap is formed between the upper surface of the radiant plate 14 and the lower surface of the cover plate 11, which constitutes the top surface of the pressure cooking chamber. Optionally, in the assembled state, at least a portion of the upper surface of the radiant plate 14 and the lower surface of the cover plate 11 are spaced apart to form a gap. In this configuration, in the area where the gap exists, the heat from the heated cover plate 11 is transferred to the radiant plate 14 via radiative heat conduction. Alternatively, the upper surface of the radiant plate 14 is provided with a gas-guiding structure, such as a gas guide groove, and a gap is formed between the gas-guiding structure and the lower surface of the cover plate 11. In this configuration, the upper surface of the radiant plate 14 and the lower surface of the cover plate 11 can be in contact or adhere to each other, and the heat from the heated cover plate 11 is transferred to the radiant plate 14 via a mixture of radiative heat conduction and contact heat conduction. Alternatively, the upper surface of the radiating plate 14 has a preset surface roughness. Due to the small spacing and minute peaks and valleys on the upper surface of the radiating plate 14, a gap will be formed even if the upper surface of the radiating plate 14 and the lower surface of the cover plate 11 are in contact. In this solution, the upper surface of the radiating plate 14 and the lower surface of the cover plate 11 can be in contact, and the heat from the heated cover plate 11 is transferred to the radiating plate 14 through a mixture of radiative heat conduction and contact heat conduction.

[0111] In this application, a minute gap exists between the cover plate 11 and the radiating plate 14. To achieve better heat transfer and gas flow, the designer can specifically design this minute gap, such as a gas guide groove. Alternatively, it can be designed according to general manufacturing processes, so that a minute gap that allows gas flow can be formed between the two surfaces in the assembled state, meaning that the gap between them is accessible to gas. The radiating plate 14 can be designed to partially contact the cover plate 11, and due to the existence of the gap, the heat from the heated cover plate 11 is transferred to the radiating plate 14 through a mixture of radiant heat conduction and contact heat conduction.

[0112] The detachable lid assembly 10 is sealed to the inner pot 4 via the pot opening sealing ring 13, forming a sealed pressure cooking chamber. There is no seal between the radiant plate 14 and the lid 11, allowing gas within the pressure cooking chamber to flow through the gap between them. When there is gas pressure within the pressure cooking chamber, the lid 11, which forms the top wall of the chamber, can withstand the pressure, while the radiant plate 14 inside the chamber does not. Therefore, the material of the radiant plate 14 can be selected primarily from the perspective of enhancing far-infrared radiation effects, without being overly concerned with material strength. The material for the radiant plate 14 can be a low-cost material, such as inexpensive everyday ceramics.

[0113] Therefore, the gap between the radiant plate 14 and the cover plate 11 allows the radiant plate 14 to avoid bearing pressure, thus solving the technical problem of poor pressure resistance caused by uneven pressure on its periphery. Since the cover plate bears the pressure within the pressure cooking chamber (which is adjustable, for example, between 10 kPa and 110 kPa), the radiant plate 14, not bearing pressure, will not crack even under high-pressure cooking conditions. Even if the radiant plate 14 cracks due to accidental impact during use, the cover plate's pressure resistance prevents explosions and other safety issues that could injure consumers, resulting in higher product safety.

[0114] To effectively transfer heat to the radiant plate 14, the heating element 20 rests against the cover plate 11, specifically the heating plate 21, allowing heat to be transferred from the heating element 20 to the cover plate 11 via thermal conduction. It should be explained that... Figure 1 This is just a schematic diagram. When the removable cover assembly 10 is assembled onto the cover body 3, the heating plate 21 can abut against the cover plate 11 without any gap between them. The heating assembly 20 contacts the cover plate 11, allowing heat to be transferred from the heating assembly to the cover plate 11 through heat conduction, and then through the heated cover plate 11 to the radiant plate 14. The heat transfer efficiency is high, allowing the radiant plate 14 to heat up quickly.

[0115] The radiant plate 14 is roughly parallel to the main body of the cover plate 11, and the distance between the radiant plate 14 and the food inside the pressure cooking chamber is small, further shortening the radiation distance of infrared rays to the food; it also facilitates the formation of a large surface-to-surface contact area, which is beneficial for heat conduction. Alternatively, the cover plate 11 has an upwardly recessed receiving portion, and the radiant plate 14 is located within the receiving portion. This design can restrict the horizontal movement of the radiant plate 14 through the receiving portion to prevent shaking; and the shape of the receiving portion and the radiant plate 14 can be configured to fit each other. For non-circular radiant plates 14, this facilitates positioning of the radiant plate 14 during assembly and prevents it from being installed backwards.

[0116] The cover 3 includes a pressure control device 40, which has an exhaust channel P1. The pressure control device 40 is mounted on the cover plate 11 and can be removed from the cover body together with the removable cover assembly 10. Figure 3 As shown, the cover 3 is provided with a steam channel structure 60 for forming a steam channel P2. The steam channel structure 60 is vertically inserted into the cover body 9 and includes a steam valve 62 and a steam seal 63. The steam seal 63 is located at the bottom of the steam valve 62 and abuts against the upper surface of the cover plate 11. The pressure control device 40 is located in the steam channel P2.

[0117] The pressure control device 40 includes a pressure valve 41 and a safety valve 42. The pressure valve 41 has a vent passage P1 for communication with the pressure cooking chamber. The safety valve 42 also has a vent passage P1 for communication with the pressure cooking chamber, which may also be referred to as a venting passage. Optionally, as... Figure 2 As shown, pressure valve 41 is fixed to cover plate 11 for removal from cover body 3 along with removable cover assembly 10; safety valve 42 is also fixed to cover plate 11 and can be removed from cover body 3 along with removable cover assembly 10. This allows for cleaning of the vent passage P1 of pressure valve 41 and the vent passage of safety valve 42, and facilitates the installation and replacement of pressure valve 41 and safety valve 42. Pressure valve 41 and safety valve 42 are located within steam passage P2. Heating plate 21 has a notch to allow passage to the steam passage structure 60 within cover body 3.

[0118] To prevent heat from the heating component 20 from being transferred towards the inner liner 6, the cover 3 also includes a heat insulation member 30. The heat insulation member 30 is disposed between the heating component 20 and the inner liner 6, and the heating component 20 can be connected to the inner liner 6 through the heat insulation member 30. This prevents heat from radiating to heat-sensitive components inside the cover 3, such as the lamp panel, and affecting the function of these components.

[0119] like Figure 4 As shown, the radiant plate 14 is detachably connected to the cover plate 11. The radiant plate 14 can be removed from the detachable cover assembly 10, allowing for individual cleaning after separation. Simultaneously, the lower surface of the cover plate 11, unobstructed by the radiant plate 14, can also be cleaned. This design greatly facilitates cleaning after use. In the connected state, the upper surface of the radiant plate 14 partially contacts the lower surface of the cover plate 11, which forms the top surface of the pressure cooking chamber. This arrangement ensures that when the cover plate 11 is heated, the heat from the heated cover plate 11 is transferred to the radiant plate via contact heat conduction. The connection method of the radiant plate 14 can be configured as needed. See also... Figure 1A connector 45 is fixedly disposed on the cover plate 11, and a connecting portion 46 is disposed on the radiating plate 14. The radiating plate 14 is detachably connected to the cover plate 11 via the connector 45 and the connecting portion 46. Exemplarily, the radiating plate 14 can be connected to the cover plate 11 by at least one fastening assembly 50, which is located at the center of the radiating plate 14. The illustrated embodiment schematically shows a fastening assembly 50, which can be located at the center of the radiating plate 14. The radiating plate 14 is separated from the cover plate 11 by disassembling the fastening assembly 50, and the radiating plate 14 is connected to the cover plate 11 by assembling the fastening assembly 50. Because the radiating plate 14 is typically heavy, the connection structure with the fastening assembly 50 can provide stronger support for the radiating plate 14, which helps the radiating plate 14 to be held more stably on the cover plate 11.

[0120] The fastening assembly 50 includes a screw member 51 for the connector 45 and a nut member 52 for the connector 46. The screw member 51 is not a conventional screw 43, and the nut member 52 is not a conventional nut; both are designed according to assembly requirements, and their specific structures are described below. The screw member 51 is fixed to the cover plate 11, for example, by welding or riveting. The nut member 52 is located on the underside of the radiating plate 14. The radiating plate 14 has mounting holes 15. Figure 8 As shown, the screw member 51 passes through the mounting hole 15, with its lower portion protruding from the mounting hole 15. The nut member 52 is screwed onto the lower portion of the screw member 51 from the underside of the radiating plate 14. The radiating plate 14 is sandwiched between the cover plate 11 and the nut member 52. The nut member 52 supports the radiating plate 14 upwards and provides strong support to the radiating plate 14. When it is necessary to remove the radiating plate 14 from the removable cover assembly 10, simply rotate the nut member 52 to disengage it from the screw member 51; when installing the radiating plate 14 onto the removable cover assembly 10, rotate the nut member 52 to tighten it onto the screw member 51. The process of removing and installing the radiating plate 14 is simple and easy to operate.

[0121] like Figure 4 As shown, the removable cover assembly 10 also includes a positioning member 16. The positioning member 16 is connected to the cover plate 11. The positioning member 16 can protrude from the lower surface of the cover plate 11. The radiating plate 14 is provided with a positioning hole 17, and the lower part of the positioning member 16 passes through the positioning hole 17. The positioning member 16 can be used to position the radiating plate 14 during assembly, preventing the radiating plate 14 from being installed backwards or improperly, and after assembly, it can restrict the position of the radiating plate 14 to prevent the radiating plate 14 from shaking. Optionally, the positioning member 16 is a separate component, which can be connected to the cover plate 11 by a suitable method such as snap-fit ​​or fastener connection such as screw 43. Alternatively, the positioning member 16 can be integrally formed with the cover plate 11.

[0122] The heating element 20 is vertically movably connected to the inner liner 6, and its position relative to the inner liner 6 is variable. Thus, the heating element 20 can float relative to the removable cover assembly 10 in directions approaching and away from the removable cover assembly 10. The floating heating element 20 avoids installation gaps, allowing it to abut against or fit snugly against the cover 11 from the side facing away from the cooking cavity, specifically ensuring that the heating plate 21 is in full contact with the cover 11.

[0123] like Figure 5 As shown, the heat insulation component 30 is provided with multiple fixed posts 31 at intervals, and the inner lining 6 is provided with multiple through holes 8 at intervals (see figure). Figure 3 The through hole 8 corresponds to the position of the fixing post 31. The screw 43 passes through the through hole 8 from the upper side of the inner liner 6 and is fastened to the fixing post 31. This allows the heat insulation member 30 to be movably connected to the inner liner 6. The outer periphery of the heating plate 21 is provided with a plurality of locking feet 23 spaced apart, and the heat insulation member 30 is provided with a plurality of locking holes 32 spaced apart. The locking feet 23 pass through the openings and are bent to fix the heating plate 21 to the heat insulation member 30. With this arrangement, the heat insulation member 30 and the heating assembly 20 float up and down together, and when they float, the screw 43 connected to the heat insulation member 30 also moves up and down relative to the inner liner 6.

[0124] The cover 3 also includes an elastic element 44. The elastic element 44 applies a biasing force to the heating assembly 20 to keep the heating assembly 20 in contact with the cover plate 11. In this way, the heating assembly 20 remains in contact with the cover plate 11, allowing heat to be transferred from the cover plate 11 to the radiating plate 14 via thermal conduction. Exemplarily, the elastic element 44 is sleeved on the fixing post 31 and abuts against the lower surface of the liner 6. The elastic element 44 may be a helical spring.

[0125] Optionally, the thermal insulation member 30 may be annular in shape. Alternatively, the thermal insulation member 30 may be plate-shaped to form a thermal insulation cover / cover.

[0126] like Figure 4 and Figure 8 As shown, the cover plate 11 has an upwardly recessed first clearance portion 18, which corresponds to the position of the fastening assembly 50. The top portion of the fastening assembly 50 is located within the recess of the clearance portion and is fixedly connected to the clearance portion. With this configuration, the connection between the fastening assembly 50 and the cover plate 11 is more stable, while avoiding a gap between the radiating plate 14 and the cover plate 11 at the fastening assembly 50. The radiating plate 14 can conduct heat with the cover plate 11 at the fastening assembly 50.

[0127] like Figure 5As shown, the heating plate 21 has an upwardly recessed second clearance portion 24, which corresponds to the position of the first clearance portion 18. The first clearance portion 18 of the cover plate 11 protrudes from the upper surface of the cover plate 11 and is located within the recess of the second clearance portion 24. This arrangement forms a positioning structure between the first clearance portion 18 and the second clearance portion 24, which can position the removable cover assembly 10 during assembly, preventing it from being installed backwards or improperly, and restricting the position of the removable cover assembly 10 after assembly to prevent it from shaking. Additionally, it prevents interference during the up-and-down movement of the heating assembly 20.

[0128] Optionally, the first clearance portion 18 and the second clearance portion 24 may have the same shape, such as a circle, a polygon or other suitable shape; the number of the first clearance portion 18 and the number of the second clearance portion 24 are the same as the number of screw components 51, such as one or more.

[0129] like Figure 6 As shown, the screw component 51 includes a mounting base 53, a positioning portion 54, an external thread 55, and a guide portion 56. The positioning portion 54 is located below the mounting base 53 and above the external thread 55. Figure 8 As shown, the mounting base 53 can be located within the recess of the first clearance portion 18 and connected to the cover plate 11. The positioning portion 54 is located within the mounting hole 15 and is adapted to fit the mounting hole 15. Optionally, there may be a gap of, for example, 0.1 to 1 mm between the two. The external thread 55 can engage with the internal thread of the nut member 52. The guide portion 56 is provided below the external thread 55, for example, formed via an R-angle or C-angle. During assembly, the screw member 51 can be easily inserted into the mounting hole 15 by means of the guide portion 56.

[0130] like Figure 7 As shown, the nut component 52 has a guide surface 57 at the threaded opening, for example, a guide surface 57 formed by an R-angle or C-angle. During assembly, the screw component 51 can be easily inserted into the nut component 52 by means of the guide surface 57. The nut component 52 has a bottom to prevent steam or the like from entering the nut component 52 and affecting the tightening effect. The outer contour shape of the nut component 52 can be circular or polygonal. The material of the nut component 52 can be metal, such as stainless steel, aluminum, titanium, etc.; or it can be silicone rubber, etc.

[0131] Optionally, the shape of the radiating plate 14 can be circular, polygonal, elliptical, or an irregular shape matching the shape of the heating plate 21. The lower surface of the radiating plate 14 has a textured surface, which can form a preset pattern. By setting the textured surface, the surface area of ​​the radiating plate 14 can be increased to better emit infrared rays, and the radiating plate 14 can also have a certain degree of non-stick properties. The preset pattern is printed on the lower surface of the radiating plate 14. When the cover 3 is opened, the consumer can observe the preset pattern from the radiating plate 14, thus improving the visual appeal of the product.

[0132] like Figure 3 , Figure 4 and Figure 9 As shown, the cover plate 11 has a cover plate opening 61, and the bottom of the pressure control device 40 passes through the cover plate opening 61. The radiant plate 14 extends below the pressure control device 40 and at least covers the exhaust passage P2 to prevent blockage of the exhaust passage P2. The radiant plate 14 covers the entire pressure control device 40 from below, specifically covering both the pressure valve 41 and the safety valve 42 from below. The radiant plate 14 has a first area S1 in the direction extending from the surface of the cover plate 11 toward the pressure cooking chamber. The radiant plate 14 is located below the pressure valve, and the first area S1 covers at least the projected area of ​​the exhaust passage P2 in the vertical projection direction.

[0133] In this design, the radiant plate 14 is located below the pressure control device on the cover plate 11, covering the exhaust channel P1 of the pressure control device. Gas within the pressure cooking chamber can flow through the gap between the radiant plate 14 and the cover plate 11, ultimately reaching the exhaust channel P1. The radiant plate 14 functions as an anti-clogging shield, effectively preventing blockage of the exhaust channel P1 over a large area, thus reducing the probability of blockage by rice, vegetable leaves, or other food. This design provides better anti-clogging performance and higher safety. This arrangement simultaneously solves the technical problems of food overflowing and blocking the exhaust channel P1 during pressure cooking and the poor pressure-bearing capacity of the radiant plate 14 itself due to uneven pressure distribution in various directions.

[0134] The radiant plate 14 has at least one vent 64 at the portion corresponding to the pressure control device 40. The illustrated embodiment schematically shows multiple spaced vents 64 for simultaneous, large-volume exhaust. The vents 64 connect the pressure cooking chamber to the exhaust channel P1. Using the vents, the electric pressure cooking appliance can meet the normal exhaust requirements during cooking. Gas can flow from the vents of the radiant plate 14 to the exhaust channel P1, resulting in a short gas flow path, high exhaust efficiency, and the ability to exhaust a large amount of gas. The vents also have an anti-clogging function, effectively reducing the probability of the exhaust channel P1 being blocked by rice, vegetable leaves, or other food, providing better anti-clogging performance and higher safety. The gap between the radiant plate 14 and the cover plate 11, combined with the vents, makes the dual functions of anti-clogging and exhaust of the radiant plate 14 more reliable.

[0135] The diameter of the vent 64 is smaller than the diameter of the opening at the bottom of the exhaust channel P1. Optionally, the diameter of the vent 64 is 0.5mm to 15mm, for example, suitable values ​​such as 0.5mm, 2mm, 4mm, 6mm, 8mm, 10mm, 12mm, 14mm, and 15mm. The small-diameter vent can block food smaller than the bottom opening of the exhaust channel P1, achieving better anti-clogging function and more effectively reducing the probability of the exhaust channel P1 being blocked by food such as rice and vegetable leaves.

[0136] Optionally, the ratio between the first area S1 of the radiant plate 14 and the second area S2 of the cover plate 11 located in the pressure cooking chamber is 0.35 to 1, for example, suitable values ​​such as 0.35, 0.4, 0.5, 0.6, 0.7, 0.8, 0.9, and 1. The radiant plate 14 occupies a larger area of ​​the cover plate 11, resulting in a larger area for receiving heat transfer from the cover plate 11 and for radiating infrared rays into the pressure cooking chamber. This allows for more infrared radiation to reach the food inside the pressure cooking chamber, effectively stimulating the aroma compounds in the food. The rim of the inner pot 4 has a third area S3 on the horizontal plane, and the ratio between the first area S1 of the radiant plate 14 and the third area S3 of the rim is 0.3 to 1, for example, suitable values ​​such as 0.3, 0.4, 0.5, 0.6, 0.7, 0.8, 0.9, and 1. If the area of ​​the radiant plate 14 is too small, the infrared radiation area is small, resulting in poor food heating. When the ratio of the area of ​​the radiant plate 14 to the area of ​​the pot opening is greater than 0.3, the infrared radiation area radiated by the radiant plate 14 is relatively large, which can meet the heating requirements of food. The thickness of the radiant plate 14 can be 2 to 12 mm, such as suitable values ​​of 2 mm, 3 mm, 4 mm, 5 mm, 6 mm, 7 mm, 8 mm, 9 mm, 10 mm, 11 mm, 12 mm, etc.

[0137] Optionally, the cover plate 11 has an upwardly recessed mounting portion 65. The top wall of the mounting portion 65 has an opening 61. The mounting portion 65 is recessed upward from the lower surface of the cover plate 11 and protrudes from the upper surface of the cover plate 11. The pressure control device 40 is mounted on the top wall of the mounting portion 65 via the cover plate opening 61, and the bottom of the pressure control device 40 is located within the recess of the mounting portion 65. This arrangement allows the recess of the mounting portion 65 to partially accommodate the pressure control device 40, ensuring a secure and reliable mounting of the pressure control device 40 to the cover plate 11. Furthermore, the recess of the mounting portion 65 can form a gas convergence area, allowing gas flowing from the exhaust port 64 and / or gaps to first converge at the recess of the mounting portion 65 before flowing to the exhaust passage P1. This helps improve the exhaust efficiency of the gas at the entrance of the exhaust passage P1.

[0138] Optionally, the cover 3 may also be equipped with a temperature measuring device (not shown) for detecting the temperature inside the pressure cooking chamber. Optionally, the cover 3 may also be equipped with a floating stop device (not shown) for limiting the position of a mounting component. The temperature measuring device and the floating stop device can be mounted on the inner liner 6. (See also: [link to previous section]) Figures 2 to 5 The heating plate 21 of the heating assembly 20 has a first mounting port 25 and a second mounting port 26. The cover plate 11 has a first through hole 47 and a second through hole 48. The radiant plate 14 has a temperature measuring hole 49 and a connecting hole (not shown). The first mounting port 25, the first through hole 47, and the temperature measuring hole 49 are vertically aligned. The temperature measuring device can be inserted through the first mounting port 25, and its temperature measuring head extends into the temperature measuring hole 49 through the first through hole 47 and extends out of the temperature measuring hole 49. The second mounting port 26, the second through hole 48, and the connecting hole are vertically aligned. The floating stop limiting device can be inserted through the second mounting port 26 and can communicate with the pressure cooking chamber through the second through hole 48 and the connecting hole.

[0139] Unless otherwise defined, the technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art. The terminology used herein is for descriptive purposes only and is not intended to limit the scope of this application. Features described in one embodiment may be applied, alone or in combination with other features, to another embodiment, unless that feature is not applicable in that other embodiment or is otherwise stated.

[0140] This application has been described through the above embodiments. However, it should be understood that the above embodiments are only for illustrative purposes. This application is not limited to the above embodiments. Many variations and modifications can be made based on the teachings of this application, and all such variations and modifications fall within the scope of protection claimed in this application.

Claims

1. A detachable cover assembly for a cover of an electric pressure cooking appliance, the electric pressure cooking appliance comprising a pot and the cover, the cover being openably and closably disposed to the pot to form a pressure cooking cavity between the cover and the pot, characterized in that, The detachable cover assembly comprises: a cover plate, a lower surface of the cover plate constituting an upper top surface of the pressure cooking cavity; and a radiation plate for radiating infrared rays to the pressure cooking cavity after being heated, the radiation plate being connected to a side of the cover plate facing the pressure cooking cavity, and an upper surface of the radiation plate and the lower surface of the cover plate constituting the upper top surface of the pressure cooking cavity forming a gap through which gas can pass.

2. The detachable lid assembly of claim 1, wherein, The radiation plate is detachably connected to the cover plate, and in the connected state, the upper surface of the radiation plate is partially in contact with the lower surface of the cover plate constituting the upper top surface of the pressure cooking cavity.

3. The detachable lid assembly of claim 2, wherein, The cover plate is fixedly provided with a connecting member, and the radiation plate is provided with a connecting portion, and the radiation plate is detachably connected to the cover plate through the connecting member and the connecting portion.

4. The detachable lid assembly of claim 1, wherein, The radiation plate is connected to the cover plate through at least one fastening assembly.

5. The detachable lid assembly of claim 4, wherein, The fastening assembly is located in the middle of the radiation plate.

6. The detachable lid assembly of claim 4, wherein, The fastening assembly comprises a screw member and a nut member, the radiation plate is provided with a mounting hole, the screw member is fixed to the cover plate and penetrates through the mounting hole, and the nut member is screwed to the screw member from the lower side of the radiation plate.

7. The detachable lid assembly of claim 4, wherein, The cover plate is provided with a first avoiding portion recessed upward, and a top portion of the fastening assembly is located in the recess of the avoiding portion and is fixedly connected with the avoiding portion.

8. The detachable cover assembly according to any one of claims 1 to 7, wherein: the radiation plate is substantially parallel to the main body of the cover plate, or the cover plate is provided with a containing portion recessed upward, and the radiation plate is located in the containing portion.

9. The detachable lid assembly of any one of claims 1 to 7, wherein, The detachable cover assembly further comprises a positioning member connected to the cover plate and protruding from the lower surface of the cover plate, and the radiation plate is provided with a positioning hole, and the positioning member penetrates through the positioning hole.

10. The detachable lid assembly of any one of claims 1 to 7, wherein, The lower surface of the radiation plate is provided with a concave-convex texture, or the lower surface of the radiation plate is printed with a pattern.

11. A cover for an electric pressure cooker, the electric pressure cooker comprising a pot and the cover, the cover being openably and closably provided to the pot to form a pressure cooking chamber between the cover and the pot, characterized in that, The cover body comprises: a cover main body, and the detachable cover assembly according to any one of claims 1 to 10 detachably connected to the cover main body in the form of an assembly.

12. The cover of claim 11, wherein, The cover body further comprises a heating assembly for heating the radiation plate, and the heating assembly is located at the upper side of the detachable cover assembly and abuts against the cover plate.

13. The cover of claim 12, wherein, The heating assembly is floatable relative to the detachable cover assembly in the direction of approaching and moving away from the detachable cover assembly.

14. The cover of claim 12, wherein, The cover body comprises an elastic element applying a biasing force to the heating assembly to keep the heating assembly abutting against the cover plate.

15. The cover of claim 12, wherein, The cover body further comprises an inner liner, and the heating assembly is located at the lower side of the inner liner and is movably connected to the inner liner in the vertical direction.

16. The cover of claim 12, wherein The heating assembly comprises a heating plate and a heating element provided on the upper surface of the heating plate, and the heating plate is provided with a second avoiding portion recessed upward, and the first avoiding portion of the cover plate protrudes from the upper surface of the cover plate and is located in the recess of the second avoiding portion.

17. The cover of any one of claims 11 to 16, wherein, The cover body comprises a pressure control device having an exhaust passage for communicating with the pressure cooking cavity.

18. The cover of claim 17, wherein, The pressure control device is fixed to the cover plate to be detached from the cover body together with the detachable cover assembly.

19. The cover of claim 17, wherein, The cover includes an inner liner, a heating assembly, and a heat insulation member, the heat insulation member is arranged between the heating assembly and the inner liner, and the heating assembly is connected with the inner liner through the heat insulation member.

20. An electrically heated pressure cooking appliance characterized in that, The electric pressure cooking appliance includes a pot body and the cover according to claim 17, the cover is arranged openably and closably on the pot body to form a pressure cooking cavity between the cover and the pot body, the radiation plate has a first area S1 in an extending direction of the cover plate towards a surface of the pressure cooking cavity, the radiation plate is located below the pressure control device and the first area S1 covers a projection area of the exhaust passage at least in a vertical projection direction.

21. The electrically heated pressure cooker according to claim 20, characterized in that, The ratio between the first area S1 of the radiation plate and a second area S2 of the cover plate located in the pressure cooking cavity is 0.35-1.

22. The electrically heated pressure cooker according to claim 20, wherein, The pot body includes an inner pot, a pot opening of the inner pot has a third area S3 on a horizontal plane, and the ratio between the first area S1 of the radiation plate and the third area S3 of the pot opening is 0.3-1.

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