Pressure cooker

Abstract

The pressure cooker belongs to the technical field of kitchen cookware and comprises a cooker cover and a cooker body, the cooker body comprises a shell and an inner container located in the shell, a plurality of air leakage grooves are formed in the upper periphery of the inner container, a sealing ring is embedded in the position, corresponding to the upper periphery of the inner container, of the lower surface of the cooker cover, and a pressure release valve is arranged on the cooker cover; a button connected with the pressure release valve is arranged on the top surface of the cooker cover; the pressure release valve is opened by pressing down the button, and air pressure in the pressure cooker is guided out through the pressure release valve in the opened state; when the cooker cover is buckled on the upper periphery of the cooker body, the sealing ring blocks the air leakage groove, and when the sealing ring deforms under a preset pressure value, the air leakage groove is opened. The structural arrangement is further optimized, the pressure is maintained when the pressure does not reach a preset value, and the pressure can be relieved safely when the pressure reaches the preset value, so that the safety performance of the product is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of kitchen utensils, in particular to a high-pressure pot. BACKGROUND

[0002] A high-pressure pot is a cooking device widely used in both domestic and commercial kitchens. Its main function is to accelerate the cooking process of food by increasing the steam pressure inside the pot. The working principle of a high-pressure pot is based on the physical properties of gases, that is, in a closed space, as the temperature rises, the pressure of the gas will also increase. Traditional cooking methods usually rely on the regular boiling point (100°C), while a high-pressure pot can raise the boiling point of water to 120°C or even higher, thus achieving faster cooking.

[0003] With the advancement of technology, modern high-pressure pots have been significantly improved in materials and design, using materials such as stainless steel, aluminum alloy, etc. that are resistant to high temperature and corrosion, and introducing multiple safety mechanisms, such as pressure release valves, to prevent accidents caused by excessive pressure.

[0004] Related prior art such as Chinese patent application "High-pressure pot", publication number: CN107361636A, discloses a high-pressure pot, the structure of which includes: a pot body, an outer cover, a secondary handle, a lower handle, a buckle groove, a sealing ring, a hidden buckle, an upper handle, an opening push button, an adjusting valve, a stop opening safety valve, a pot cover, an air release window, a timing rotary knob, a voice time reporting device, and tempered glass. The present application has more functions, is equipped with a timing rotary knob and a voice time reporting device, can report the time to remind people, is relatively safe, the pot body is equipped with tempered glass, the internal situation of the pot can be seen, and problems can be responded in time, which is relatively safe, and the outer cover is equipped with multiple air holes, which also ensures the safety of use.

[0005] For example, Chinese patent application "High-pressure pot", publication (announcement) number: CN105942843A, discloses a high-pressure pot including a pot body and a pot cover corresponding to the upper periphery of the pot body. The lower surface of the pot cover is embedded with a sealing ring at the position corresponding to the upper periphery of the pot body. The pot cover is installed with a pressure limiting valve, a stop opening safety valve, and a gas release valve. The outer side of the pot body is installed with a handle. The pot cover is equipped with a rotatable guide mechanism and multiple clamp structures. The guide mechanism is detachably installed at the center of the upper surface of the pot cover. Each clamp structure is uniformly distributed along the circumference of the pot cover and is movably connected with the guide mechanism. When the guide mechanism rotates in a first direction, it can drive each clamp structure to approach the pot cover to clamp the pot cover and the pot body. When the guide mechanism rotates in a second direction, it can drive each clamp structure to move away from the pot cover to loosen the pot cover and the pot body.

[0006] The high-pressure cooker structure in the prior art usually adopts a structure such as a pressure relief valve or a pressure relief window to release the pressure of the high-pressure cooker to prevent accidents caused by excessively high pressure. However, the pressure relief valve and the like essentially release the gas through the air hole on the lid. If the food in the pot is porridge, the air hole on the lid is easily blocked after boiling, the gas pressure in the pot cannot be normally discharged, and the pot may explode if continuously heated. Practical new type content

[0007] The technical problem to be solved by the present application is to provide a high-pressure cooker, further optimize the structure, maintain the pressure when the pressure does not reach a predetermined value, safely release the pressure when the pressure reaches the predetermined value, and improve the safety performance of the product.

[0008] The technical solution adopted by the present application is: a high-pressure cooker, comprising a lid and a pot body, the pot body comprising an outer shell and an inner container located in the outer shell, a plurality of pressure relief grooves are arranged at the upper periphery of the inner container, a sealing ring is embedded on the lower surface of the lid corresponding to the upper periphery of the inner container, a pressure relief valve is arranged on the lid, and a button connected with the pressure relief valve is arranged on the top surface of the lid; pressing the button opens the pressure relief valve, and the gas pressure in the high-pressure cooker is discharged through the opened pressure relief valve; when the lid is buckled on the upper periphery of the pot body, the sealing ring blocks the pressure relief grooves, and the sealing ring deforms under a predetermined pressure value to open the pressure relief grooves.

[0009] Compared with the prior art, the present application has the following advantages: firstly, when the high-pressure cooker is initially heated and warmed up, the pressure relief valve on the lid is in a normally closed state, and the sealing ring embedded on the lower surface of the lid blocks the pressure relief grooves, effectively preventing the leakage of gas in the pot and ensuring the sealing performance of the high-pressure cooker during operation. This design can improve the cooking efficiency and allow the food to be quickly cooked at a higher pressure and temperature. After the high-pressure cooker is continuously heated, the pressure value in the high-pressure cooker will continue to rise until it reaches a predetermined pressure value. At this time, the sealing ring will deform under the action of the pressure, and the deformed sealing ring cannot block the pressure relief grooves, so the pressure relief grooves are opened. The high-pressure cooker can handle various types of food, including porridge that is prone to foaming. The design of the pressure relief grooves can effectively prevent the air hole from being blocked due to boiling of the food. The design of the pressure relief grooves ensures normal gas discharge under high pressure and avoids safety hazards caused by blockage, thereby improving the applicability and safety of the high-pressure cooker. The design of the high-pressure cooker integrates the functions of the pressure relief grooves and the sealing ring, simplifies the structure, reduces the number of components, and reduces the failure rate. At the same time, the pressure relief valve button arranged on the top surface of the lid allows the user to easily operate when releasing the pressure, improving the user experience. The user only needs to press the button to open the pressure relief valve, which is convenient and fast.

[0010] In some embodiments of the present application, a handle is provided on the lid, and a cavity for installing the transmission assembly is provided in the handle. A through hole is formed in the handle for the user's hand to pass through, and the part of the handle above the through hole constitutes a holding part.

[0011] The design of the handle takes into account the user experience. By providing a through hole for the user's hand to pass through, the user can hold and control the lid more conveniently when operating the pressure cooker. This humanized design can reduce the discomfort of the user during use and improve the comfort of operation. The design of the handle allows the user to maintain a certain distance when operating the pressure cooker, avoiding direct contact with the lid and reducing the risk of burns caused by high temperature. At the same time, the stability and rationality of the design also increase the safety during use.

[0012] In some embodiments of the present application, the pressure relief valve is located in the cavity of the handle and is connected to the transmission assembly through the button. The gas port is formed in the handle to connect the external environment with the cavity of the handle.

[0013] The pressure relief valve is located in the cavity of the handle and is connected to the transmission assembly through the button. This design allows the user to operate away from the high-temperature lid, reducing the risk of burns caused by high-temperature steam or hot liquid. The user only needs to press the button to release the pressure, ensuring safe operation.

[0014] The integrated design of the pressure relief valve, the gas port, the button, and the transmission assembly reduces the number of components and simplifies the structure. The gas port design on the handle can effectively connect the external environment with the cavity of the handle, ensuring that the gas can be smoothly discharged when releasing the pressure.

[0015] In some embodiments of the present application, the pressure relief valve includes a valve seat and a valve core. The valve seat is installed on the lid and penetrates the lid. The valve core is installed in the valve seat and moves up and down along the axial direction of the valve seat under force. A pressure relief channel is provided in the valve core. When the valve core is at the lower limit position, the pressure relief channel connects the internal and external environments of the pressure cooker. When the valve core is at the upper limit position, the pressure relief channel is blocked by the valve seat.

[0016] The structure of the valve seat and the valve core is simple, easy to understand and manufacture. This simplicity helps to reduce production costs and improve product reliability, reducing the likelihood of failure. The design of the valve core allows it to quickly respond to changes in pressure in the pot, ensuring that the valve core moves upward to close the pressure relief channel after the pressure rises, improving the sensitivity and safety of operation.

[0017] In some embodiments of the present application, the transmission assembly includes a toggle lever, the first end of which is connected to the button, the second end of which is connected to the spring, the middle part of which is connected to the handle through the rotating shaft, and the first end of which is connected to the valve core. The spring exerts force to press down the second end of the toggle lever, and drives the first end of the toggle lever to rise, at which time the valve core is located at the upper limit position. Pressing the button drives the first end of the toggle lever to move downward, and drives the valve core to move to the lower limit position.

[0018] In the present application, the rotating shaft installed on the handle constitutes the fulcrum of the toggle lever rising, and the working principle of the toggle lever is similar to that of a seesaw. In the present application, the spring is arranged to achieve that the button is at the upper limit position in the normal state, and the button needs to overcome the force exerted by the spring when pressed.

[0019] The design of the toggle lever enables the force exerted by the user to be effectively transmitted to the valve core, achieving rapid pressure release. This efficient force transmission mechanism ensures that when pressure needs to be released, the user only needs to press the button easily to complete the operation, improving the convenience of use.

[0020] In some embodiments of the present application, the button is located above the first end of the toggle lever, the valve core is located below the first end of the toggle lever, and the spring is located above the second end of the toggle lever, and the spring is in a compressed state.

[0021] The layout design of the button, the valve core and the spring is reasonable, which can effectively utilize the space, making the entire transmission assembly more compact. This optimized space utilization helps to improve the overall design aesthetics and functionality of the pressure cooker. When the user presses the button, the first end of the toggle lever will move downward rapidly, driving the valve core to open. This design enables the valve core to respond quickly to the user's operation, ensuring that the exhaust can be performed in time and effectively when pressure needs to be released.

[0022] In some embodiments of the present application, the second end of the toggle lever is connected to a limiting piece, a limiting sheet is installed on the handle, a limiting opening is formed on the limiting sheet, the limiting piece is installed in the limiting opening of the limiting piece, and the limiting piece moves up and down along the limiting opening under force.

[0023] In the present application, by arranging the limiting piece and the limiting opening, the movement of the toggle lever is limited, ensuring the stability and reliability of the movement of the toggle lever.

[0024] In some embodiments of the present application, the pressure relief channel has a horizontal U-shaped structure, including an upper horizontal channel, a lower horizontal channel, and a vertical channel connecting the upper and lower horizontal channels. One end of the upper horizontal channel and one end of the lower horizontal channel penetrate the wall surface of the valve core, and the upper horizontal channel is in communication with the handle cavity. When the valve core is located at the lower limit position, the lower horizontal channel extends below the valve seat, and the pressure relief channel communicates the internal and external environments of the pressure cooker. When the valve core is located at the upper limit position, the lower horizontal channel is located in the valve core, and the lower horizontal channel is blocked by the valve seat.

[0025] By designing the pressure relief channel as a transverse U-shaped structure, the space can be effectively utilized, and the complexity inside the valve core is reduced. When the valve core is located at the upper limit, the lower transverse channel is blocked by the valve seat, ensuring that the gas in the pot cannot leak. This good sealing performance ensures the safety and efficiency of the pressure cooker during operation.

[0026] In some embodiments of the present application, nine gas vent grooves are uniformly arranged on the upper periphery of the inner container, and the gas vent grooves are in communication with the environment outside the pressure cooker.

[0027] The uniform arrangement of nine gas vent grooves is the preferred structural scheme of the present application. Multiple gas vent grooves can provide multiple exhaust channels when the pressure in the pressure cooker is too high, ensuring that the gas can be quickly released, reducing the safety hazards caused by excessive pressure. This design improves the safety of the pressure cooker. The uniform arrangement of the gas vent grooves ensures that the flow of gas during discharge is more stable, reducing the concentration of local pressure and structural stress caused by uneven gas flow, prolonging the service life of the pressure cooker. This design can adapt to different types of cooking needs, especially when dealing with food that is prone to foaming (such as porridge), it can effectively prevent safety hazards caused by foam blocking the exhaust channel.

[0028] In some embodiments of the present application, when the pot cover is fastened to the upper periphery of the pot body, part of the sealing ring is lined on the inner wall surface of the inner container, and the sealing ring blocks the gas vent grooves from the environment inside the pressure cooker.

[0029] The design of the sealing ring can effectively prevent the leakage of gas in the pressure cooker, ensuring the sealing of the environment in the pot. By blocking the gas vent grooves, the sealing ring can maintain the high-pressure environment in the pot during cooking. This high-pressure environment can increase the boiling point of water, thereby accelerating the cooking time of food and improving the cooking efficiency.

[0030] The above embodiments can be combined arbitrarily based on common sense in the art. BRIEF DESCRIPTION OF DRAWINGS

[0031] The present application will be described in further detail below with reference to the accompanying drawings and preferred embodiments, but those skilled in the art will appreciate that these drawings are only drawn for the purpose of explaining the preferred embodiments and therefore should not be considered as limiting the scope of the present application. In addition, unless specifically indicated, the drawings only schematically represent the composition or structure of the described objects and can include exaggerated displays, and the drawings are not necessarily drawn to scale.

[0032] Figure 1 is a structural schematic diagram of the present application;

[0033] Figure 2 is a bottom surface structure schematic diagram of the pot cover in the present application;

[0034] Figure 3 This is a cross-sectional view of the pot lid and inner pot in this application;

[0035] Figure 4 for Figure 3 A partial enlarged view of the transmission assembly;

[0036] Figure 5 This is a schematic diagram of the structure of the pot body in this application.

[0037] The specific labels in the attached drawings are explained as follows: 1. Lid; 2. Pot body; 3. Outer shell; 4. Inner liner; 5. Vent groove; 6. Sealing ring; 7. Pressure relief valve; 8. Button; 9. Through-hole; 10. Actuating lever; 11. Valve core; 12. Valve seat; 13. Spring; 14. Shaft; 15. Handle; 16. Air port; 17. Limiting element; 18. Limiting plate; 19. Pressure relief channel. Detailed Implementation

[0038] The present application will now be described in detail with reference to the accompanying drawings.

[0039] To make the objectives, technical solutions, and advantages of this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the scope of this application.

[0040] A pressure cooker, as described in Embodiment 1 Figures 1 to 3 As shown: The pressure cooker includes a lid 1 and a pot body 2. The pot body 2 includes an outer shell 3 and an inner pot 4 located inside the outer shell 3. Several venting grooves 5 are provided on the upper edge of the inner pot 4. A sealing ring 6 is embedded on the lower surface of the lid 1 at a location corresponding to the upper edge of the inner pot 4. A pressure relief valve 7 is provided on the lid 1, and a button 8 connected to the pressure relief valve 7 is provided on the top surface of the lid 1. When the pressure cooker is initially heating up, the pressure relief valve 7 on the lid 1 is in a closed state, and the sealing ring 6 embedded on the lower surface of the lid 1 blocks the venting grooves 5, effectively preventing gas leakage and ensuring the pressure cooker's sealing during operation. This design improves cooking efficiency, allowing food to be cooked quickly under higher pressure and temperature.

[0041] Pressing button 8 opens the pressure relief valve 7, allowing the pressure inside the pressure cooker to be released through the open valve. The button 8 on the top surface of the lid 1 allows for easy pressure release, enhancing the user experience. Users can simply press button 8 to open the pressure relief valve 7, making it convenient and quick.

[0042] The pot cover 1 is buckled on the pot body 2, and the sealing ring 6 blocks the air release groove 5. After the pressure cooker is continuously heated, the pressure value in the pressure cooker will continuously rise until it reaches a predetermined pressure value. At this time, the sealing ring 6 will deform under the action of the pressure, and the deformed sealing ring 6 cannot block the air release groove 5, so the air release groove 5 is opened. The design of the air release groove 5 can effectively prevent the air hole from being blocked due to boiling of food. The design of the air release groove 5 ensures normal exhaust under high pressure and avoids safety hazards caused by blockage, thereby improving the applicability and safety of the pressure cooker. The pressure cooker of the application can process various types of food, including porridge which is easy to produce foam.

[0043] As shown in the second embodiment, Figure 5 The inner container 4 is uniformly provided with nine air release grooves 5 around the periphery, and the air release grooves 5 are in communication with the environment outside the pressure cooker. The uniform arrangement of the nine air release grooves 5 is the preferred structure scheme of the application. Multiple air release grooves 5 can provide multiple exhaust channels when the pressure in the pressure cooker is too high, ensuring that the gas can be quickly released and reducing the safety hazards caused by excessive pressure. This design improves the safety of the pressure cooker. The uniform arrangement of the air release grooves 5 can ensure that the flow of gas is more stable when it is discharged, reducing the concentration of local pressure and reducing the structural stress caused by uneven gas flow, thereby prolonging the service life of the pressure cooker. This design can adapt to different cooking needs, especially when processing food that is easy to produce foam (such as porridge), it can effectively prevent safety hazards caused by foam blocking the exhaust channel.

[0044] As shown in the third embodiment, Figure 3 When the pot cover 1 is buckled on the periphery of the pot body 2, part of the sealing ring 6 is lined on the inner wall surface of the inner container 4, and the sealing ring 6 blocks the air release groove 5 in the pressure cooker. The design of the sealing ring 6 can effectively prevent the leakage of gas in the pressure cooker and ensure the sealing of the pot environment. By blocking the air release groove 5, the sealing ring 6 can maintain the high pressure environment in the pot during cooking. This high pressure environment can increase the boiling point of water, thereby accelerating the cooking time of food and improving the cooking efficiency.

[0045] The other contents of the second embodiment are the same as those of the first embodiment.

[0046] As shown in the third embodiment, Figures 1 to 4As shown, the pot cover 1 is provided with a handle 15, and the handle 15 is provided with a cavity for installing a transmission assembly. A through hole 9 is formed in the handle 15 for the user to pass his hand through. The handle 15 above the through hole 9 constitutes a hand holding part. The design of the handle 15 takes into account the user experience. By forming the through hole 9 for the user to pass his hand through, the user can hold and control the pot cover 1 more conveniently when operating the pressure cooker. This humanized design can reduce the discomfort of the user during use and improve the comfort of operation. The design of the handle 15 allows the user to maintain a certain distance when operating the pressure cooker, avoiding direct contact with the pot cover 1 and reducing the risk of burns caused by high temperature. At the same time, the stability and rationality of the design of the handle 15 also increase the safety during use.

[0047] The pressure relief valve 7 is located in the cavity of the handle 15 and is connected to the transmission assembly through the button 8. This design allows the user to be away from the high-temperature pot cover 1 when operating, reducing the risk of burns caused by high-temperature steam or hot liquid. The user only needs to press the button 8 to release the pressure, ensuring safe operation. The integrated design of the pressure relief valve 7, the air port 16, the button 8 and the transmission assembly reduces the number of components and simplifies the structure. The design of the air port 16 on the handle 15 can effectively connect the external environment with the cavity of the handle 15, ensuring that the gas can be smoothly discharged when releasing the pressure.

[0048] The pressure relief valve 7 includes a valve seat 12 and a valve core 11. The valve seat 12 is installed on the pot cover 1 and penetrates the pot cover 1. The valve core 11 is installed in the valve seat 12 and moves up and down along the axial direction of the valve seat 12 under force. The valve core 11 is provided with a pressure relief channel 19. When the valve core 11 is at the lower limit position, the pressure relief channel 19 connects the internal and external environments of the pressure cooker. When the valve core 11 is at the upper limit position, the pressure relief channel 19 is blocked by the valve seat 12. The structure of the valve seat 12 and the valve core 11 is simple, easy to understand and manufacture. This simplicity helps to reduce production costs and improve product reliability, reducing the likelihood of failure. The design of the valve core 11 allows it to quickly respond to changes in the pressure in the pot, ensuring that the valve core 11 moves upward to close the pressure relief channel 19 after the pressure rises, improving the sensitivity and safety of operation.

[0049] The transmission assembly includes a toggle lever 10, the first end of which is connected with the button 8, the second end of which is connected with a spring 13, the middle part of which is connected with a handle 15 through a rotating shaft 14, and the first end of which is connected with a valve core 11; the spring 13 exerts force to press down the second end of the toggle lever 10, and drives the first end of the toggle lever 10 to be raised, at this time, the valve core 11 is located at the upper limit position; pressing down the button 8 drives the first end of the toggle lever 10 to move downward, and drives the valve core 11 to move to the lower limit position.

[0050] In the present application, the rotating shaft 14 installed on the handle 15 constitutes the fulcrum of the toggle lever 10 being raised, and the working principle of the toggle lever 10 is similar to that of a seesaw. In the present application, by setting the spring 13, the button 8 is kept at the upper limit position in the normal state, and the button 8 needs to overcome the force exerted by the spring 13 to be pressed down. The design of the toggle lever 10 enables the force exerted by the user to be effectively transmitted to the valve core 11, realizing rapid pressure release. This efficient force transmission mechanism ensures that when pressure needs to be released, the user only needs to press down the button 8 easily to complete the operation, improving the convenience of use.

[0051] The button 8 is located above the first end of the toggle lever 10, the valve core 11 is located below the first end of the toggle lever 10, and the spring 13 is located above the second end of the toggle lever 10, and the spring 13 is in a compressed state. The layout design of the button 8, the valve core 11 and the spring 13 is reasonable, which can effectively utilize the space, so that the whole transmission assembly is more compact. This optimized space utilization helps to improve the overall design aesthetics and functionality of the pressure cooker. When the user presses down the button 8, the first end of the toggle lever 10 will move downward rapidly, driving the valve core 11 to open. This design enables the valve core 11 to respond quickly to the user's operation, ensuring that when pressure needs to be released, it can be effectively vented in time.

[0052] The second end of the toggle lever 10 is connected with a limiting piece 17, a limiting sheet 18 is installed on the handle 15, a limiting opening is formed in the limiting sheet 18, the limiting piece 17 is installed in the limiting opening of the limiting piece 17, and the limiting piece 17 moves up and down along the limiting opening under force. In the present application, by setting the limiting piece 17 and the limiting opening, the movement of the toggle lever 10 is limited, ensuring the stability and reliability of the movement of the toggle lever 10.

[0053] The pressure relief channel 19 is in a horizontal U-shaped structure, including an upper horizontal channel, a lower horizontal channel, and a vertical channel connecting the upper and lower horizontal channels. One end of the upper horizontal channel and one end of the lower horizontal channel penetrate the wall of the valve core 11. The upper horizontal channel is located in the cavity of the handle 15 and is in communication with the cavity of the handle 15. When the valve core 11 is in the lower limit position, the lower horizontal channel extends below the valve seat 12, and the pressure relief channel 19 is in communication with the internal and external environments of the pressure cooker. When the valve core 11 is in the upper limit position, the lower horizontal channel is located in the valve core 11, and the lower horizontal channel is blocked by the valve seat 12. By designing the pressure relief channel 19 in a horizontal U-shaped structure, the space can be effectively utilized, and the complexity inside the valve core 11 is reduced. When the valve core 11 is in the upper limit position, the lower horizontal channel is blocked by the valve seat 12, which ensures that the gas in the pot cannot leak. This good sealing performance ensures the safety and efficiency of the pressure cooker during operation.

[0054] The other contents of Example Three are the same as those of Example One or Example Two.

[0055] The above has carried on the detailed introduction to the application, and the principle and implementation mode of the application are described by applying specific examples in this paper. The above example is only used to help understand the application and the core idea. It should be pointed out that for ordinary skilled persons in the technical field, without departing from the principle of the application, the application can be improved and modified in several ways, and these improvements and modifications also fall within the protection scope of the claims of the application.

Claims

1. A pressure cooker, characterized in that The utility model provides a pressure cooker, which comprises a lid (1) and a body (2), the body (2) comprises an outer shell (3) and an inner container (4) in the outer shell (3), a plurality of air release grooves (5) are arranged on the upper periphery of the inner container (4), a sealing ring (6) is embedded on the lower surface of the lid (1) at the position corresponding to the upper periphery of the inner container (4), a pressure relief valve (7) is arranged on the lid (1), and a button (8) connected with the pressure relief valve (7) is arranged on the top surface of the lid (1); the pressure relief valve (7) is opened by pressing the button (8), and the air pressure in the pressure cooker is discharged through the opened pressure relief valve (7); when the lid (1) is buckled on the upper periphery of the body (2), the sealing ring (6) blocks the air release grooves (5), and the sealing ring (6) is deformed at a predetermined pressure value, so that the air release grooves (5) are opened.

2. A pressure cooker according to claim 1, characterized in that A handle (15) is arranged on the lid (1), a cavity for installing a transmission assembly is arranged in the handle (15), a through hole (9) for passing through a hand is formed in the handle (15), and the handle (15) above the through hole (9) constitutes a hand holding part.

3. A pressure cooker according to claim 2, characterized in that The upper part of the pressure relief valve (7) penetrates the lid (1) and is located in the cavity of the handle (15), the button (8) is connected with the pressure relief valve (7) through a transmission assembly, an air inlet (16) is formed in the handle (15), and the air inlet (16) connects the cavity of the handle (15) with the external environment.

4. A pressure cooker according to claim 1, characterized in that The pressure relief valve (7) comprises a valve seat (12) and a valve core (11), the valve seat (12) is installed on the lid (1) and penetrates the lid (1), the valve core (11) is installed in the valve seat (12) and moves up and down along the axial direction of the valve seat (12) under force, and a pressure relief channel (19) is arranged in the valve core (11); when the valve core (11) is located at the lower limit position, the pressure relief channel (19) connects the internal and external environments of the pressure cooker; when the valve core (11) is located at the upper limit position, the pressure relief channel (19) is blocked by the valve seat (12).

5. A pressure cooker according to claim 4, characterized in that The transmission assembly comprises a toggle lever (10), the first end of the toggle lever (10) is connected with the button (8), the second end of the toggle lever (10) is connected with a spring (13), the middle part of the toggle lever (10) is connected with the handle (15) through a rotating shaft (14), and the first end of the toggle lever (10) is connected with the valve core (11); the spring (13) exerts force to press the second end of the toggle lever (10) and lift the first end of the toggle lever (10), so that the valve core (11) is located at the upper limit position; pressing the button (8) moves the first end of the toggle lever (10) downward, so that the valve core (11) is moved to the lower limit position.

6. A pressure cooker according to claim 5, characterized in that The button (8) is located above the first end of the toggle lever (10), the valve core (11) is located below the first end of the toggle lever (10), and the spring (13) is located above the second end of the toggle lever (10) and is in a compressed state.

7. A pressure cooker according to claim 5, wherein The second end of the toggle lever (10) is connected with a limiting member (17), a limiting sheet (18) is installed on the handle (15), a limiting opening is formed on the limiting sheet (18), the limiting member (17) is installed in the limiting opening of the limiting member (17), and the limiting member (17) moves up and down along the limiting opening under stress.

8. A pressure cooker according to claim 4, characterized in that The pressure relief channel (19) is in a transversely arranged U-shaped structure, comprising an upper transverse channel, a lower transverse channel and a longitudinal channel connecting the upper and lower transverse channels, one end of the upper transverse channel and one end of the lower transverse channel penetrating the wall surface of the valve core (11), the upper transverse channel being located in the cavity of the handle (15) and being in communication with the cavity of the handle (15); when the valve core (11) is located at the lower limit position, the lower transverse channel extends below the valve seat (12), and the pressure relief channel (19) is in communication with the inner and outer environments of the pressure cooker; when the valve core (11) is located at the upper limit position, the lower transverse channel is located in the valve core (11), and the lower transverse channel is blocked by the valve seat (12).

9. A pressure cooker according to claim 1, characterized in that Nine air release grooves (5) are uniformly arranged on the upper periphery of the inner container (4), and the air release grooves (5) are in communication with the outer environment of the pressure cooker.

10. A pressure cooker according to claim 1 or 9, characterized in that When the pot cover (1) is buckled on the upper periphery of the pot body (2), part of the sealing ring (6) is lined on the inner wall surface of the inner container (4), and the sealing ring (6) blocks the inner environment of the pressure cooker and the air release grooves (5).

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