Pressure limiting valve, pressure cooker cover and pressure cooker

Abstract

The utility model provides a pressure limiting valve, a pressure cooker cover and a pressure cooker. The pressure limiting valve comprises an exhaust pipe; the valve element assembly is arranged above the exhaust pipe and can move in the direction close to or away from the exhaust pipe so as to open or close the exhaust pipe. The exhaust switch is arranged on one side of the exhaust pipe and can move in the direction close to or away from the axis of the exhaust pipe so as to push the peripheral side of the valve element assembly to achieve exhaust or loosen the peripheral side of the valve element assembly to cancel exhaust. The safety of exhaust operation of the pressure limiting valve can be improved, and therefore the use experience of the pressure cooker is improved.

Description

Technical Field

[0001] This application relates to the field of kitchen utensil technology, and in particular to a pressure relief valve, a pressure cooker lid, and a pressure cooker. Background Technology

[0002] A pressure cooker is a common cooking appliance that primarily increases the heating temperature by increasing the pressure inside the pot, thereby accelerating the heating process. A pressure cooker mainly consists of a pressure lid and a pot body. The pressure lid usually has a pressure-limiting valve to limit the maximum pressure inside the pot, ensuring cooking safety. After cooking, the pressure-limiting valve usually needs to be opened to quickly release the pressure. In current technology, this typically requires lifting the valve core assembly significantly or removing it completely to achieve rapid pressure release, which negatively impacts the user experience. Utility Model Content

[0003] This application provides a pressure relief valve, a pressure cooker lid, and a pressure cooker to improve the safety of the pressure relief valve's venting operation, thereby enhancing the user experience of the pressure cooker.

[0004] The first aspect of this application provides a pressure relief valve, which includes:

[0005] Exhaust pipe;

[0006] A valve core assembly is disposed above the exhaust pipe and is capable of moving toward or away from the exhaust pipe to open or close the exhaust pipe;

[0007] An exhaust switch is located on one side of the exhaust pipe and can move toward or away from the axis of the exhaust pipe to push against the periphery of the valve core assembly to exhaust air, or to release the periphery of the valve core assembly to cancel exhaust air.

[0008] The pressure-limiting valve provided in this application includes an exhaust pipe, a valve core assembly, and an exhaust switch. The valve core assembly is located above the exhaust pipe and can move towards or away from the exhaust pipe to open or close the exhaust pipe, thereby opening or closing the pressure-limiting valve. The exhaust switch is located on one side of the exhaust pipe and can move towards or away from the axis of the exhaust pipe to push against the periphery of the valve core assembly to achieve exhaust, or to release the periphery of the valve core assembly to cancel exhaust. That is, by pushing the valve core assembly in a direction approximately perpendicular to the axis of the exhaust pipe, the valve core assembly can be moved laterally or tilted laterally. The valve core assembly only needs to move a small amount to deviate from the exhaust pipe to achieve rapid exhaust, thereby improving the user experience of the pressure cooker. The maximum lateral movement distance of the valve core assembly should not exceed the width of the top of the exhaust pipe to prevent the valve core assembly from falling off the edge of the exhaust pipe. This ensures that after the exhaust switch releases the valve core assembly, the exhaust switch can be reset by reverse lateral movement or tilting, thereby simplifying the reset operation of the valve core assembly and further improving the user experience of the pressure cooker.

[0009] Optionally, the pressure relief valve further includes a valve seat, which is sleeved on the outer periphery of the exhaust pipe and fixedly connected to the exhaust pipe. The exhaust switch is slidably connected to the valve seat. On the one hand, by setting the valve seat on the outer periphery of the exhaust pipe, the valve seat and the cover abut against each other to limit the movement, thereby increasing the contact area between the pressure relief valve and the cover, thus increasing the stability of the pressure relief valve installation and fixation. On the other hand, the exhaust switch is slidably connected to the valve seat, so that the various components of the pressure relief valve are connected to each other as a whole, thereby improving the integration of the pressure relief valve and the compactness of the overall structure.

[0010] Optionally, the valve seat has a guide groove at one end along the axial direction of the exhaust pipe, and the guide groove extends in a direction close to or away from the axis of the exhaust pipe; the exhaust switch has a guide post, which protrudes along the axial direction of the exhaust pipe, is inserted into the guide groove, and can slide along the extension direction of the guide groove. The guide post is inserted vertically into the guide groove and moves horizontally along the guide groove. The contact area between the guide post and the guide groove is small and remains constant. Furthermore, the guide post and the guide groove only serve a guiding function and do not need to withstand longitudinal compression or other forces, thereby reducing the possibility of wear or breakage of the guide post and extending the service life of the pressure relief valve.

[0011] Optionally, the cross-section of the guide groove and the cross-section of the guide post are concentric arc-shaped structures. On the one hand, the guide post slides along the arc extension direction of the guide groove, causing the exhaust switch to rotate on the valve seat, thereby extending the movement path of the exhaust switch and allowing the valve core assembly to shift smoothly and slowly. On the other hand, the guide groove also positions the guide post, restricting its rotation within the guide groove and preventing changes in the installation orientation of the exhaust switch, which would affect the normal cooperation between the exhaust switch and the valve core assembly. Furthermore, there is no need to set a special positioning structure between the exhaust switch and the valve seat, making the structure of the pressure relief valve simpler and more compact.

[0012] Optionally, the guide groove has a first latching portion on one side along its width direction, and the first latching portion extends along the extension direction of the guide groove; the guide post has a second latching portion, the second latching portion is connected to the first latching portion, and can slide along the first latching portion. Simply inserting the guide post into the guide groove allows the second latching portion and the first latching portion to engage with each other, completing the installation of the exhaust switch on the valve seat. No additional screws or other fasteners are required, simplifying the overall structure of the pressure relief valve, reducing the number of parts, and simplifying the assembly operation.

[0013] Optionally, the exhaust switch is provided with a limiting part, which is arranged parallel to the guide post and located on the side of the guide post away from the axis of the exhaust pipe. When the exhaust switch moves towards the axis of the exhaust pipe, the limiting part can fit against the outer edge of the valve seat. A large contact surface is formed between the limiting part and the valve seat, preventing the exhaust switch from moving further towards the axis of the exhaust pipe. This reliably limits the maximum amplitude of the exhaust switch pushing against the valve core assembly, preventing the valve core assembly from deviating too far from the exhaust pipe and making it difficult for the valve core assembly to reset.

[0014] Optionally, the valve seat and the exhaust pipe form an upward-opening annular cavity. A portion of the valve core assembly extends downward into the annular cavity, dividing it into a first annular channel and a second annular channel connected at their bottoms. The top of the second annular channel communicates with the outside atmosphere. After passing through the exhaust pipe, the high-pressure gas inside the pot passes sequentially through the first and second annular channels and is discharged to the outside atmosphere from the top of the second annular channel. This extends the exhaust path within a limited space, thereby reducing the exhaust temperature and the risk of burns to the user. Furthermore, by directing the gas upwards, the user operates the exhaust switch outside the gas exhaust area, preventing burns from the gas hitting the user.

[0015] Optionally, the valve core assembly includes: a valve core body disposed above the exhaust pipe to open or close the exhaust pipe, the side of the valve core body facing the exhaust pipe being spherical; and a valve body having a downward-opening cavity structure, the valve core body being connected to the valve body, and the exhaust pipe being inserted into the valve body. The gradual curvature change of the spherical surface reduces the resistance to lateral movement of the valve core body, making the operation of the exhaust switch easier, and also reduces the height change generated during lateral movement of the valve core body, thereby reducing the range of motion of the valve core body and facilitating automatic reset of the valve core. The valve body acts as a counterweight and shield for the exhaust pipe, ensuring that the weight of the valve core assembly matches the maximum pressure requirement of the pressure cooker, and preventing the high-temperature gas discharged from the exhaust pipe from spraying directly upwards and scalding the user.

[0016] A second aspect of this application provides a pressure cooker lid, comprising a lid body and any of the pressure-limiting valves provided in this application. The exhaust pipe passes through the lid body and is sealed to it. This application allows the valve core assembly to be pushed along a direction substantially perpendicular to the axis of the exhaust pipe, causing lateral movement or tilting. The valve core assembly only needs a small range of movement to deviate from the exhaust pipe for rapid exhaust, thereby improving the user experience of the pressure cooker. The maximum lateral movement distance of the valve core assembly should not exceed the width of the top of the exhaust pipe to prevent the valve core assembly from falling off the edge of the exhaust pipe. This ensures that after the exhaust switch releases the valve core assembly, the exhaust switch can be reset by reverse lateral movement or tilting, simplifying the reset operation of the valve core assembly and further improving the user experience of the pressure cooker.

[0017] A third aspect of this application provides a pressure cooker, comprising a pot body and any of the pressure cooker lids provided in this application, the pressure cooker lid fitting over the pot body. This application allows the valve core assembly to be pushed along a direction substantially perpendicular to the axis of the exhaust pipe, causing the valve core assembly to move laterally or tilt laterally. The valve core assembly only needs a small range of movement to deviate from the exhaust pipe and achieve rapid exhaust, thereby improving the user experience of the pressure cooker. The maximum lateral movement distance of the valve core assembly should not exceed the width of the top of the exhaust pipe to prevent the valve core assembly from falling off the edge of the exhaust pipe. This ensures that after the exhaust switch releases the valve core assembly, the exhaust switch can be reset by reverse lateral movement or tilting, thereby simplifying the reset operation of the valve core assembly and further improving the user experience of the pressure cooker.

[0018] It should be understood that the above general description and the following detailed description are merely exemplary and do not limit this application. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the structure of a pressure cooker lid provided in an embodiment of this application;

[0020] Figure 2 This is a partial structural schematic diagram of the pressure cooker lid provided in an embodiment of this application;

[0021] Figure 3 A cross-sectional view of the pressure relief valve in the closed state, as provided in an embodiment of this application;

[0022] Figure 4 A cross-sectional view of the pressure relief valve in the open state, as provided in an embodiment of this application;

[0023] Figure 5 An exploded view of the valve seat and exhaust switch in disassembled state as provided in an embodiment of this application;

[0024] Figure 6 This is a schematic diagram of the connection structure between the valve seat and the exhaust switch provided in an embodiment of this application.

[0025] Figure label:

[0026] 10 - Pressure relief valve;

[0027] 20-Cap;

[0028] 1-Exhaust pipe;

[0029] 2-Valve core assembly;

[0030] 21-Valve core body;

[0031] 22-Valve body;

[0032] 3-Exhaust switch;

[0033] 31-Guide column;

[0034] 32-Second buckle part;

[0035] 33-Limiting part;

[0036] 34-butt part;

[0037] 35 - Operating handle;

[0038] 4-Valve seat;

[0039] 41-Guide groove;

[0040] 42-First buckle part;

[0041] 43 - First Circular Channel;

[0042] 44 - Second annular channel;

[0043] 5-Snap ring.

[0044] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with this application and, together with the description, serve to explain the principles of this application. Detailed Implementation

[0045] 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.

[0046] In the description of this application, unless otherwise expressly specified and limited, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance; unless otherwise specified or explained, the term "multiple" refers to two or more; the terms "connected," "fixed," etc., should be interpreted broadly. For example, "connected" can be a fixed connection, a detachable connection, an integral connection, or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0047] In the description of this specification, it should be understood that the directional terms such as "upper" and "lower" used in the embodiments of this application are used to describe the angles shown in the accompanying drawings and should not be construed as limiting the embodiments of this application. Furthermore, in the context, it should also be understood that when it is mentioned that an element is connected "upper" or "lower" to another element, it can be directly connected to the other element "upper" or "lower," or indirectly connected to the other element "upper" or "lower" through an intermediate element.

[0048] like Figure 1 As shown in the figure, this application embodiment provides a pressure cooker lid, which includes a lid body 20 and a pressure limiting valve 10. The pressure limiting valve 10 can be fixed to the lid body 20 by means of nuts, snaps, or integral molding, etc. At least a part of the pressure limiting valve 10 passes through the lid body 20 and is sealed with the lid body 20; when the pressure limiting valve 10 is closed, the pressure cooker lid forms a sealed state, and the pressure inside the pot can increase, thereby realizing high-pressure cooking; when the pressure limiting valve 10 is open, the pressure cooker lid forms a pressure relief state, and the gas inside the pot can be discharged to the outside atmosphere through the pressure limiting valve 10, thereby reducing the pressure inside the pot.

[0049] like Figures 2-4As shown, the pressure-limiting valve 10 provided in this embodiment includes an exhaust pipe 1 and a valve core assembly 2. The exhaust pipe 1 is used to connect to the cover 20, that is, the exhaust pipe 1 passes through the cover 20 and is sealed to the cover 20, and the exhaust pipe 1 connects the inner and outer sides of the cover 20; the valve core assembly 2 is disposed above the exhaust pipe 1 and can move towards or away from the exhaust pipe 1 to open or close the exhaust pipe 1, thereby opening or closing the pressure-limiting valve 10. Specifically, during normal cooking, the valve core assembly 2 moves downward under its own gravity and closes the exhaust pipe 1, thereby closing the pressure-limiting valve 10 to achieve high-pressure cooking; as the pressure inside the pot increases, the valve core assembly 2 moves upward under the action of high-pressure gas and opens the exhaust pipe 1, thereby opening the pressure-limiting valve 10 to release gas, preventing the pressure inside the pot from becoming too high and ensuring cooking safety.

[0050] Furthermore, the pressure relief valve 10 also includes a vent switch 3. The vent switch 3 is located on one side of the exhaust pipe 1 and can move towards or away from the axis of the exhaust pipe 1 to push against the periphery of the valve core assembly 2 to achieve venting, or to release the periphery of the valve core assembly 2 to cancel venting. That is, by pushing the valve core assembly 2 in a direction approximately perpendicular to the axis of the exhaust pipe 1, the valve core assembly 2 can move laterally or tilt laterally. The valve core assembly 2 only needs to move a small amount to deviate from the exhaust pipe 1 to achieve rapid venting, thereby improving the user experience of the pressure cooker. The maximum lateral movement distance of the valve core assembly 2 should not exceed the width of the top of the exhaust pipe 1 to prevent the valve core assembly 2 from falling off the edge of the exhaust pipe 1. This ensures that after the vent switch 3 releases the valve core assembly 2, the vent switch 3 can be reset by reverse lateral movement or tilting, thereby simplifying the reset operation of the valve core assembly 2 and further improving the user experience of the pressure cooker.

[0051] Specifically, refer to Figure 3 When the exhaust switch 3 moves away from the axis of the exhaust pipe 1, the exhaust switch 3 releases the circumference of the valve core assembly 2, allowing the valve core assembly 2 to automatically or manually reset. In other words, the valve core assembly 2 can close the exhaust pipe 1, thereby closing the pressure relief valve 10 for high-pressure cooking. (Reference) Figure 4 When the exhaust switch 3 moves toward the axis of the exhaust pipe 1, the exhaust switch 3 pushes against the periphery of the valve core assembly 2, causing the valve core assembly 2 to deviate from the exhaust pipe 1, thereby opening the pressure relief valve 10 to achieve rapid exhaust.

[0052] Furthermore, the valve core assembly 2 includes a valve core body 21 and a valve body 22. The valve core body 21 is positioned above the exhaust pipe 1 to open or close the exhaust pipe 1. That is, the valve core body 21 is supported on the top of the exhaust pipe 1 and forms a sealing fit with the exhaust pipe 1, thereby closing the exhaust pipe 1. The valve body 22 has a downward-opening cavity structure. The valve core body 21 is connected inside the valve body 22, and the exhaust pipe 1 is inserted into the valve body 22. On the one hand, the valve body 22 acts as a counterweight, matching the weight of the valve core assembly 2 with the maximum pressure requirement of the pressure cooker. On the other hand, the valve body 22 acts as a shield for the exhaust pipe 1, preventing the high-temperature gas discharged from the exhaust pipe 1 from spraying directly upwards and scalding the user.

[0053] Among them, a retaining ring 5 or other connecting parts can be provided between the valve body 22 and the exhaust pipe 1 to limit the maximum axial movement distance between the valve body 22 and the exhaust pipe 1, so as to prevent the valve core assembly 2 from falling off the exhaust pipe 1 and causing the parts to be lost.

[0054] Furthermore, the side of the valve core body 21 facing the exhaust pipe 1 is spherical. On the one hand, a linear seal is formed between the spherical surface and the exhaust pipe 1, ensuring the reliability of the sealing fit between the valve core body 21 and the exhaust pipe 1; on the other hand, the curvature of the spherical surface changes gently, which reduces the resistance to lateral movement of the valve core body 21, making the operation of the exhaust switch 3 easier, and also reduces the height change generated when the valve core body 21 moves laterally, thus reducing the range of motion of the valve core body 21. In addition, when the exhaust switch 3 releases the circumference of the valve core assembly 2, the spherical surface abuts against the exhaust pipe 1, allowing the valve core assembly 2 to automatically reset, eliminating the need for manual reset of the pressure relief valve 10 by the user, further improving the convenience of operation.

[0055] The exhaust switch 3 can be connected to any suitable location, such as the cover 20, the cover handle, or a specially designed mounting base. The exhaust switch 3 can move along any suitable path, such as a straight line, a diagonal line, or a curve, as long as it can move closer to or further away from the axis of the exhaust pipe 1. An abutment part 34 can be provided at the end of the exhaust switch 3 closest to the axis of the exhaust pipe 1, which is used to push the valve core assembly 2. An operating handle 35 can be provided at the end of the exhaust switch 3 furthest from the axis of the exhaust pipe 1. Operating the exhaust switch 3 at a position furthest from the axis of the exhaust pipe 1 prevents the user from being burned by the gas emitted from the exhaust pipe 1.

[0056] like Figures 2-6As shown, the pressure relief valve 10 further includes a valve seat 4, which is sleeved on the outer periphery of the exhaust pipe 1 and fixedly connected to the exhaust pipe 1. The exhaust switch 3 is slidably connected to the valve seat 4. On the one hand, by setting the valve seat 4 on the outer periphery of the exhaust pipe 1, the valve seat 4 and the cover 20 abut against each other to limit the movement, thereby increasing the contact area between the pressure relief valve 10 and the cover 20, thus increasing the stability of the pressure relief valve 10 in installation and fixation. On the other hand, the exhaust switch 3 is slidably connected to the valve seat 4, so that the various components of the pressure relief valve 10 are connected to each other as a whole, thereby improving the integration and compactness of the overall structure of the pressure relief valve 10.

[0057] Furthermore, the valve seat 4 and the exhaust pipe 1 form an upward-opening annular cavity. A portion of the valve core assembly 2 (e.g., a portion of the valve body 22) extends downward into the annular cavity, dividing it into a first annular channel 43 and a second annular channel 44 connected at their bottoms. The top of the second annular channel 44 communicates with the external atmosphere. In other words, after the high-pressure gas inside the pot passes through the exhaust pipe 1, it sequentially passes through the first annular channel 43 and the second annular channel 44, and is discharged to the external atmosphere from the top of the second annular channel 44. On the one hand, extending the exhaust path within a limited space reduces the exhaust temperature of the gas, lowering the risk of burns to the user; on the other hand, by directing the gas upwards, the user operates the exhaust switch 3 outside the area where the gas is emitted, preventing burns caused by the gas hitting the user.

[0058] Furthermore, the valve seat 4 has a guide groove 41 at one end along the axial direction of the exhaust pipe 1, and the guide groove 41 extends along the direction close to or away from the axis of the exhaust pipe 1; the exhaust switch 3 has a guide post 31, which protrudes along the axial direction of the exhaust pipe 1, is inserted into the guide groove 41, and can slide along the extension direction of the guide groove 41. That is, the guide post 31 is inserted into the guide groove 41 vertically and moves horizontally along the guide groove 41. The contact area between the guide post 31 and the guide groove 41 is small and remains unchanged. Moreover, the guide post 31 and the guide groove 41 only play a guiding role and do not need to bear other forces such as longitudinal compression, thereby reducing the possibility of wear or breakage of the guide post 31 and extending the service life of the pressure relief valve 10.

[0059] Furthermore, when the guide groove 41 is located at one end of the valve seat 4 along the axial direction of the exhaust pipe 1, the cross-section of the guide groove 41 and the cross-section of the guide post 31 are concentric arc structures. That is, the guide groove 41 extends along the arc in a direction away from the axis of the exhaust pipe 1. On the one hand, the guide post 31 slides along the arc extension direction of the guide groove 41, causing the exhaust switch 3 to rotate on the valve seat 4, thereby extending the movement path of the exhaust switch 3 and allowing the valve core assembly 2 to shift smoothly and slowly. On the other hand, the guide groove 41 also positions the guide post 31, restricting the rotation of the guide post 31 within the guide groove 41, preventing changes in the installation orientation of the exhaust switch 3, and affecting the normal cooperation between the exhaust switch 3 and the valve core assembly 2. Moreover, there is no need to set a special positioning structure between the exhaust switch 3 and the valve seat 4, making the structure of the pressure relief valve 10 simpler and more compact.

[0060] Furthermore, the guide groove 41 has a first latching part 42 on one side along its width direction, and the first latching part 42 extends along the extension direction of the guide groove 41; the guide post 31 has a second latching part 32, which is connected to the first latching part 42 and can slide along the first latching part 42. That is to say, the cooperation between the second latching part 32 and the first latching part 42 only forms an axial latching constraint on the guide post 31 to prevent the exhaust switch 3 from moving away from the valve seat 4, without restricting the sliding of the guide post 31 along the guide groove 41. Simply inserting the guide post 31 into the guide groove 41 allows the second latching part 32 and the first latching part 42 to latch together and complete the installation of the exhaust switch 3 on the valve seat 4. No additional screws or other fasteners are required, which simplifies the overall structure of the pressure relief valve 10, reduces the number of parts in the pressure relief valve 10, and simplifies the assembly operation of the pressure relief valve 10.

[0061] Furthermore, the exhaust switch 3 is provided with a limiting part 33, which is arranged side by side with the guide post 31. The limiting part 33 is located on the side of the guide post 31 away from the axis of the exhaust pipe 1. When the exhaust switch 3 moves towards the axis of the exhaust pipe 1, the limiting part 33 can fit against the outer edge of the valve seat 4. That is, a large contact surface is formed between the limiting part 33 and the valve seat 4, preventing the exhaust switch 3 from moving further towards the axis of the exhaust pipe 1. This can stably and reliably limit the maximum amplitude of the exhaust switch 3 pushing the valve core assembly 2, preventing the valve core assembly 2 from deviating too much from the exhaust pipe 1, which would make it difficult for the valve core assembly 2 to reset.

[0062] In addition, this application also provides a pressure cooker, which includes a pot body and any of the pressure cooker lids provided in this application. The pressure cooker lid fits onto the pot body and can achieve a sealing fit with the pot body.

[0063] The above description is merely a preferred embodiment of this application and is not intended to limit this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A pressure relief valve, characterized in that, include: Exhaust pipe (1); The valve core assembly (2) is disposed above the exhaust pipe (1) and can move toward or away from the exhaust pipe (1) to open or close the exhaust pipe (1); An exhaust switch (3) is located on one side of the exhaust pipe (1) and can move toward or away from the axis of the exhaust pipe (1) to push against the periphery of the valve core assembly (2) to exhaust air, or to release the periphery of the valve core assembly (2) to cancel exhaust air.

2. The pressure relief valve according to claim 1, characterized in that, The pressure relief valve also includes a valve seat (4), which is sleeved on the outer periphery of the exhaust pipe (1) and fixedly connected to the exhaust pipe (1). The exhaust switch (3) is slidably connected to the valve seat (4).

3. The pressure relief valve according to claim 2, characterized in that, The valve seat (4) is provided with a guide groove (41) at one end along the axial direction of the exhaust pipe (1), and the guide groove (41) extends along the direction close to or away from the axis of the exhaust pipe (1). The exhaust switch (3) is provided with a guide post (31), which protrudes along the axial direction of the exhaust pipe (1). The guide post (31) is inserted into the guide groove (41) and can slide along the extension direction of the guide groove (41).

4. The pressure relief valve according to claim 3, characterized in that, The cross-section of the guide groove (41) and the cross-section of the guide post (31) are concentric arc-shaped structures.

5. The pressure relief valve according to claim 3, characterized in that, The guide groove (41) has a first latching part (42) on one side along its width direction, and the first latching part (42) extends along the extension direction of the guide groove (41). The guide post (31) is provided with a second latching part (32), which is connected to the first latching part (42) and can slide along the first latching part (42).

6. The pressure relief valve according to claim 3, characterized in that, The exhaust switch (3) is provided with a limiting part (33), which is arranged side by side with the guide post (31). The limiting part (33) is located on the side of the guide post (31) away from the axis of the exhaust pipe (1). When the exhaust switch (3) moves toward the axis of the exhaust pipe (1), the limiting part (33) can fit against the outer edge of the valve seat (4).

7. The pressure relief valve according to claim 2, characterized in that, The valve seat (4) and the exhaust pipe (1) form an annular cavity with the opening facing upward. A part of the valve core assembly (2) extends into the annular cavity from top to bottom and divides the annular cavity into a first annular channel (43) and a second annular channel (44) connected at the bottom. The top of the second annular channel (44) is connected to the outside atmosphere.

8. The pressure relief valve according to any one of claims 1-7, characterized in that, The valve core assembly (2) includes: A valve core body (21) is disposed above the exhaust pipe (1) to open or close the exhaust pipe (1). The side of the valve core body (21) facing the exhaust pipe (1) is spherical. The valve body (22) has a cavity structure with an opening facing downwards. The valve core body (21) is connected inside the valve body (22), and the exhaust pipe (1) is inserted into the valve body (22).

9. A pressure cooker lid, characterized in that, It includes a cover and a pressure relief valve as described in any one of claims 1-8, wherein the exhaust pipe passes through the cover and is sealed to the cover.

10. A pressure cooker, characterized in that, It includes a pot body and a pressure cooker lid as described in claim 9, wherein the pressure cooker lid is fitted onto the pot body.

Images