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 body is of a cavity-shaped structure with a downward opening, and the exhaust pipe is sleeved with the valve body; the valve element is located in the valve body, the valve element is arranged at the top of the exhaust pipe, and the valve element moves in the axial direction of the exhaust pipe so as to open or close the exhaust pipe; the pressure regulating piece is movably connected to the valve body, and the pressure regulating piece is provided with a first position and a second position; when the pressure regulating piece is located at the first position, the pressure regulating piece and the valve element are separated from each other, and the valve element moves independently. When the pressure regulating piece is located at the second position, the pressure regulating piece is connected with the valve element, and the valve body moves along with the valve element. The preset pressure of the pressure limiting valve can be adjusted according to needs, and various different cooking requirements are met.

Description

Technical Field

[0001] The present application relates to the technical field of kitchen appliances, and in particular to a pressure limiting valve, a pressure cooker cover, and a pressure cooker. Background Art

[0002] A pressure cooker is a common cooking appliance. Its primary function is to increase the temperature and speed of cooking by increasing the pressure within the cooker. A pressure cooker primarily consists of a lid and a pot. The lid is typically equipped with a pressure-limiting valve to control the pressure within the pot within a safe range. Specifically, when the pressure within the pot exceeds the preset pressure of the valve, the gas inside the pot is released through the valve, thereby limiting the pressure within the pot.

[0003] In the prior art, the weight of the valve core is constant, so the preset pressure of the pressure-limiting valve is also fixed, and the pressure in the pot cannot be adjusted as needed. Utility Model Content

[0004] The present application provides a pressure limiting valve, a pressure cooker cover and a pressure cooker, so as to adjust the preset pressure of the pressure limiting valve as needed to meet a variety of different cooking needs.

[0005] A first aspect of the present application provides a pressure limiting valve, comprising:

[0006] exhaust pipe;

[0007] The valve body is a cavity-shaped structure with an opening downward, and the valve body is sleeved on the exhaust pipe;

[0008] a valve core located inside the valve body, the valve core being disposed at the top of the exhaust pipe and moving along the axial direction of the exhaust pipe to open or close the exhaust pipe;

[0009] a pressure regulating member movably connected to the valve body, the pressure regulating member having a first position and a second position;

[0010] When the pressure regulating member is located at the first position, the pressure regulating member and the valve core are separated from each other, and the valve core moves independently;

[0011] When the pressure regulating member is located at the second position, the pressure regulating member is connected to the valve core, and the valve body moves along with the valve core.

[0012] The pressure-limiting valve provided in this application includes an exhaust pipe, a valve body, a valve core, and a pressure-regulating member. The exhaust pipe is connected to the cover body to securely mount the pressure-limiting valve. The valve body is a downwardly opening cavity-like structure that is sleeved onto the exhaust pipe, forming the external shape of the pressure-limiting valve. The valve core is located within the valve body and is disposed at the top of the exhaust pipe. The valve core moves axially along the exhaust pipe to open or close the exhaust pipe, thereby limiting the pressure within the pot. The pressure-regulating member is movably connected to the valve body and has a first position and a second position. The first position is further away from the valve core than the second position. The preset pressure of the pressure-limiting valve is adjusted by the pressure-regulating member to meet a variety of different cooking needs. When the pressure regulating member is in the first position, the pressure regulating member and the valve core are separated from each other, and the valve core moves alone. The pressure in the pot only needs to overcome the weight of the valve core itself to open the exhaust pipe for exhaust, so that the pot can be cooked at a lower pressure, meeting the low-pressure cooking needs of easy-to-cook ingredients such as vegetables or pasta; when the pressure regulating member is in the second position, the pressure regulating member is connected to the valve core, and the valve body moves with the valve core, that is, the pressure in the pot needs to overcome the total weight of the valve core and the valve body before the exhaust pipe can be opened for exhaust, so that the pot can be cooked at a higher pressure, meeting the high-pressure cooking needs of difficult-to-cook ingredients such as meat.

[0013] Optionally, the pressure regulating member is disposed above the valve core and moves axially along the valve body; when the pressure regulating member is in the first position, a gap is formed between the pressure regulating member and the valve core; when the pressure regulating member is in the second position, the pressure regulating member abuts against the top of the valve core. The pressure regulating member is parallel to the movement direction of the valve core, which not only ensures that the pressure regulating member always forms a limit above the valve core, preventing the valve core from directly colliding with the valve body and generating noise, but also makes the overall structure of the pressure-limiting valve more compact.

[0014] Optionally, the pressure-limiting valve further includes a toggle switch located outside the valve body and disposed at the top of the valve body; the pressure regulating member is located within the valve body, a portion of the pressure regulating member passes through the top of the valve body and is connected to the toggle switch, and the toggle switch adjusts the pressure regulating member to the first position or the second position. A user only needs to operate the toggle switch to adjust the pressure regulating member to a predetermined position, thereby improving the convenience of operating the pressure-limiting valve.

[0015] Optionally, the toggle switch is hingedly connected to the pressure regulating member, and the toggle switch includes a first support portion and a second support portion, the first support portion and the second support portion being arranged in sequence around the rotation axis of the toggle switch, with the outer edge of the first support portion being farther away from the rotation axis of the toggle switch than the outer edge of the second support portion. When the first support portion abuts against the top of the valve body, the pressure regulating member is in the first position; when the second support portion abuts against the top of the valve body, the pressure regulating member is in the second position. By swinging the toggle switch about the rotation axis, switching between the first and second support portions, the height position of the pressure regulating member is adjusted. This structure is simple and reliable, and is not prone to problems such as jamming.

[0016] Optionally, an elastic member is provided between the pressure regulating member and the valve body, with both ends of the elastic member elastically pressing against the top wall of the valve body and the pressure regulating member, respectively, to force the pressure regulating member to move downward, thereby allowing the pressure regulating member to stably remain in the second position and ensuring that the valve body can move upward along with the valve core.

[0017] Optionally, a first annular portion is provided inside the valve body, and the first annular portion protrudes from the inner wall of the valve body in the radial direction of the valve body; the valve core is located above the first annular portion, and the inner hole of the first annular portion is smaller than the diameter of the valve core, so as to confine the valve core inside the valve body and prevent the valve core from falling out of the valve body, resulting in loss of parts.

[0018] Optionally, the exhaust pipe is located below the first annular portion, and the inner hole of the first annular portion is smaller than the outer diameter of the exhaust pipe. When the pressure regulating member is in the first position, the first annular portion abuts against the exhaust pipe. The exhaust pipe provides axial support and position limiting for the valve body, ensuring that after the pressure limiting member and the valve core are separated, the valve body cannot move further downward, thereby ensuring sufficient free movement space above the valve core.

[0019] Optionally, at least one of the top of the exhaust pipe and the bottom of the annular portion is provided with a guide structure. The radial dimension of the guide structure gradually decreases from bottom to top, and the exhaust pipe and the first annular portion abut against each other via the guide structure. The guide structure provides automatic alignment, ensuring that the center of the first annular portion is aligned with the center of the exhaust pipe, thereby increasing the stability of the valve body.

[0020] Optionally, a second annular portion is provided within the valve body, projecting axially from the top wall of the valve body and surrounding the outer circumference of the valve core. The second annular portion radially limits the valve core to prevent the valve core from deviating from the exhaust pipe and affecting normal closure of the exhaust pipe.

[0021] The second aspect of the present application provides a pressure cooker lid, which includes a lid body and any one of the pressure-limiting valves provided in the present application, wherein the exhaust pipe is provided through the lid body and is sealed with the lid body. When the pressure regulating member is in a first position, the pressure regulating member and the valve core are separated from each other, the valve body remains stationary, and the valve core moves independently. In other words, the pressure in the pot only needs to overcome the weight of the valve core itself to open the exhaust pipe for exhaust, so that the pot can be cooked at a lower pressure, meeting the low-pressure cooking requirements of easy-to-cook ingredients such as vegetables or pasta; when the pressure regulating member is in a second position, the pressure regulating member is connected to the valve core, and the valve body moves along with the valve core. In other words, the pressure in the pot needs to overcome the total weight of the valve core and the valve body before the exhaust pipe is opened for exhaust, so that the pot can be cooked at a higher pressure, meeting the high-pressure cooking requirements of hard-to-cook ingredients such as meat.

[0022] A third aspect of the present application provides a pressure cooker, comprising a cooker body and any one of the pressure cooker lids provided herein, wherein the pressure cooker lid is movably connected to the cooker body and can achieve a sealing fit with the cooker body. When the pressure regulating member is in a first position, the pressure regulating member and the valve core are separated from each other, the valve body remains stationary, and the valve core moves independently. In other words, the pressure in the cooker only needs to overcome the weight of the valve core itself to open the exhaust pipe for exhaust, allowing the cooker to cook at a lower pressure, thus meeting the low-pressure cooking requirements of easily cooked ingredients such as vegetables or pasta. When the pressure regulating member is in a second position, the pressure regulating member is connected to the valve core, and the valve body moves along with the valve core. In other words, the pressure in the cooker needs to overcome the combined weight of the valve core and valve body to open the exhaust pipe for exhaust, allowing the cooker to cook at a higher pressure, thus meeting the high-pressure cooking requirements of easily cooked ingredients such as meat.

[0023] It should be understood that the foregoing general description and the following detailed description are merely illustrative and are not restrictive of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 A schematic diagram of the pressure limiting valve provided in an embodiment of the present application in a closed exhaust pipe state during low-pressure cooking;

[0025] Figure 2 A schematic diagram of the pressure limiting valve provided in an embodiment of the present application with the exhaust pipe open during low-pressure cooking;

[0026] Figure 3 A schematic diagram of the pressure limiting valve provided in an embodiment of the present application in a closed exhaust pipe state during high-pressure cooking;

[0027] Figure 4 This is a schematic diagram of the pressure limiting valve provided in an embodiment of the present application with the exhaust pipe open during high-pressure cooking.

[0028] Reference numerals:

[0029] 10-cover;

[0030] 1- Exhaust pipe;

[0031] 11-Guidance structure;

[0032] 2-valve body;

[0033] 2a-base;

[0034] 2b-upper cover;

[0035] 21- first annular portion;

[0036] 22- second annular portion;

[0037] 23-guide hole;

[0038] 3-valve core;

[0039] 4-pressure regulating piece;

[0040] 5- Toggle switch;

[0041] 51-first supporting portion;

[0042] 52- second supporting portion;

[0043] 6- elastic member;

[0044] 7-Circlip.

[0045] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present application and, together with the description, serve to explain the principles of the present application. DETAILED DESCRIPTION

[0046] In order to make the purpose, technical solutions and advantages of this application more clearly understood, the present application is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain this application and are not intended to limit this application.

[0047] In the description of this application, unless otherwise specified or limited, the terms "first" and "second" are used for descriptive purposes only and are not to be understood as indicating or implying relative importance; unless otherwise specified or explained, the term "plurality" refers to two or more; the terms "connected" and "fixed" should be understood in a broad sense. For example, "connected" can mean 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. For those skilled in the art, the specific meanings of the above terms in this application can be understood according to the specific circumstances.

[0048] In the description of this specification, it should be understood that the directional words such as "upper" and "lower" described in the embodiments of the present application are described from the perspectives shown in the accompanying drawings and should not be understood as limiting the embodiments of the present application. In addition, in the context, it should be understood that when it is mentioned that an element is connected to another element "on" or "under", it can not only be directly connected to the other element "on" or "under", but also indirectly connected to the other element "on" or "under" through an intermediate element.

[0049] like Figure 1-Figure 4 As shown, an embodiment of the present application provides a pressure cooker lid, comprising a lid body 10 and a pressure-limiting valve. The lid body 10 is provided with a mounting hole. An exhaust pipe 1 of the pressure-limiting valve is disposed through the mounting hole and extends into the interior of the lid body 10. This allows gas within the cooker to be discharged through the pressure-limiting valve, thereby limiting the pressure within the cooker. The pressure-limiting valve and the mounting hole are sealed to prevent gas leakage through the mounting hole.

[0050] The pressure-limiting valve provided in the embodiment of the present application includes an exhaust pipe 1, a valve body 2, and a valve core 3. The exhaust pipe 1 is used to connect to the cover body 10 to achieve the installation and fixation of the pressure-limiting valve. For example, the exhaust pipe 1 can be connected to the cover body 10 in a detachable manner such as a nut or a snap, or it can be connected to the cover body 10 in a non-detachable manner such as welding or integral molding. The valve body 2 is a cavity-like structure with an opening downward, and the valve body 2 is sleeved on the exhaust pipe 1, thereby forming the external shape of the pressure-limiting valve. The valve core 3 is located inside the valve body 2 and is set at the top of the exhaust pipe 1. The valve core 3 moves along the axial direction of the exhaust pipe 1 to open or close the exhaust pipe 1, thereby limiting the pressure in the pot. Specifically, when the valve core 3 opens the exhaust pipe 1, the gas in the pot can be discharged to the outside of the pot to prevent the pressure in the pot from being too high; when the valve core 3 closes the exhaust pipe 1, the expected pressure state can be formed in the pot to meet the cooking requirements of the pressure cooker.

[0051] Furthermore, the pressure limiting valve includes a pressure regulating member 4. The pressure regulating member 4 is movably connected to the valve body 2. For example, the pressure regulating member 4 can be connected to the valve body 2 in any appropriate manner such as sliding or rotating. The pressure regulating member 4 has a first position and a second position. The first position is farther away from the valve core 3 than the second position. The preset pressure of the pressure limiting valve is changed by the pressure regulating member 4 to meet various cooking needs. When the pressure regulating member 4 is in the first position (refer to Figure 1 and Figure 2 ), the pressure regulating member 4 and the valve core 3 are separated from each other, the valve body 2 remains stationary, and the valve core 3 moves alone, that is, the pressure in the pot only needs to overcome the weight of the valve core 3 itself to open the exhaust pipe 1 for exhaust, so that the pot can be cooked at a lower pressure, meeting the low-pressure cooking requirements of easy-to-cook ingredients such as vegetables or pasta; when the pressure regulating member 4 is in the second position (reference Figure 3 and Figure 4), the pressure regulating member 4 is connected to the valve core 3, and the valve body 2 moves with the valve core 3. That is to say, the pressure in the pot needs to overcome the total weight of the valve core 3 and the valve body 2 before the exhaust pipe 1 can be opened for exhaust, so that the pot can be cooked at a higher pressure, meeting the high-pressure cooking requirements of meat and other ingredients that are not easy to cook.

[0052] Specifically, the valve core 3 can be configured in any suitable structure, such as a spherical or cylindrical shape. The bottom of the valve core 3 can be provided with a conical or spherical mating surface, through which the valve core 3 mates with the exhaust pipe 1, thereby increasing the reliability of the fit between the valve core 3 and the exhaust pipe 1. The weight of the valve core 3 is much smaller than that of the valve body 2, thereby increasing the pressure range of the pressure-limiting valve.

[0053] The pressure-regulating member 4 can move in any direction, as long as it can move closer to and farther from the valve core 3. A locking structure can be provided between the pressure-regulating member 4 and the valve body 2 to ensure that the pressure-regulating member 4 can remain stably in the first or second position. The pressure-regulating member 4 can be connected to the valve core 3 by abutting, clamping, or threaded connection, as long as the valve core 3 can provide an upward supporting force on the pressure-regulating member 4, allowing the valve body 2 to move upward with the valve core 3.

[0054] In one embodiment, the pressure regulating member 4 is disposed above the valve core 3 and moves along the axis of the valve body 2. The first position is above the second position, and the pressure regulating member 4 is parallel to the movement direction of the valve core 3. This not only allows the pressure regulating member 4 to always form a limit above the valve core 3, preventing the valve core 3 from directly colliding with the valve body 2 and generating noise, but also makes the overall structure of the pressure limiting valve more compact. When the pressure regulating member 4 is in the first position, the pressure regulating member 4 is away from the valve core 3, forming a gap between the pressure regulating member 4 and the valve core 3, allowing the valve core 3 to move upward freely and open the exhaust pipe 1. When the pressure regulating member 4 is in the second position, the pressure regulating member 4 abuts against the valve core 3, so that the valve core 3 provides an upward support force on the valve body 2, and the valve body 2 moves upward with the valve core 3 to open the exhaust pipe 1. A guide hole 23 or other structure can be provided around the pressure regulating member 4 to ensure that the pressure regulating member 4 can move accurately along the axis and prevent deviation in the movement of the pressure regulating member 4, which may affect the normal cooperation between the pressure regulating member 4 and the valve core 3.

[0055] Furthermore, the pressure regulating member 4 is disposed within the valve body 2 to enhance the appearance of the pressure limiting valve. A portion of the pressure regulating member 4 extends through the top of the valve body 2 and is exposed outside the valve body 2, making it easier for the user to apply external force to the pressure regulating member 4 to adjust the pressure regulating member 4 to the first position or the second position.

[0056] Furthermore, the pressure-limiting valve includes a selector switch 5. For example, the selector switch 5 can be a push-button switch, a rotary switch, or a toggle switch, as long as it can adjust the height position of the pressure-regulating member 4. The selector switch 5 is located outside the valve body 2 and is disposed at the top of the valve body 2. The portion of the pressure-regulating member 4 exposed at the top of the valve body 2 is connected to the selector switch 5. The selector switch 5 adjusts the pressure-regulating member 4 to either the first position or the second position. In other words, the user only needs to operate the selector switch 5 to adjust the pressure-regulating member 4 to a predetermined position, thereby improving the convenience of operating the pressure-limiting valve.

[0057] In one embodiment, the switch 5 is hinged to the pressure regulating member 4. The switch 5 includes a first support portion 51 and a second support portion 52. The switch 5 abuts against the top of the valve body 2 via the first support portion 51 or the second support portion 52. The first support portion 51 and the second support portion 52 are arranged in sequence around the rotation axis of the switch 5. The radial dimension of the first support portion 51 is greater than the radial dimension of the second support portion 52. That is, the outer edge of the first support portion 51 is farther away from the rotation axis of the switch 5 than the outer edge of the second support portion 52. When the first support portion 51 abuts against the top of the valve body 2 (refer to FIG. 2 ), the switch 5 is in contact with the top of the valve body 2. Figure 1 and Figure 2 ), the support height of the pressure regulating member 4 is higher, and the pressure regulating member 4 is located in the first position; when the second supporting portion 52 is against the top of the valve body 2 (reference Figure 3 and Figure 4 ), the support height of the pressure regulating member 4 is lower, and the pressure regulating member 4 is in the second position. By swinging the switch 5 about the rotation axis, switching between the first support portion 51 and the second support portion 52, the height position of the pressure regulating member 4 is adjusted. The structure is simple and reliable, and is not prone to malfunctions such as jamming.

[0058] Furthermore, an elastic member 6 is provided between the pressure regulating member 4 and the valve body 2, and the two ends of the elastic member 6 elastically press against the top wall of the valve body 2 and the pressure regulating member 4 respectively to force the pressure regulating member 4 to move downward, so that the pressure regulating member 4 can stay stably in the second position, ensuring that the valve body 2 can move upward together with the valve core 3.

[0059] Furthermore, a fastener such as a retaining spring 7 can be provided between the valve body 2 and the exhaust pipe 1 to limit the relative movement distance of the valve body 2 and the exhaust pipe 1 in the axial direction, so that the valve body 2 and the exhaust pipe 1 form a whole, preventing the valve body 2 and the exhaust pipe 1 from separating from each other and causing loss of parts.

[0060] Furthermore, a first annular portion 21 is provided within the valve body 2, protruding radially from the inner wall of the valve body 2. The valve core 3 is located above the first annular portion 21. The inner hole of the first annular portion 21 is smaller than the diameter of the valve core 3, thereby confining the valve core 3 within the valve body 2 and preventing the valve core 3 from falling out of the valve body 2 and causing component loss. The valve body 2 includes a detachably connected base 2a and an upper cover 2b. The first annular portion 21 is provided on the base 2a, and the valve core 3 is located between the first annular portion 21 and the upper cover 2b, facilitating installation, removal, and replacement of the valve core 3.

[0061] Furthermore, the exhaust pipe 1 is positioned below the first annular portion 21, the inner hole of which is smaller than the outer diameter of the exhaust pipe 1. When the pressure regulating member 4 is in the first position, the first annular portion 21 abuts against the exhaust pipe 1. The exhaust pipe 1 provides axial support and position limiting for the valve body 2, ensuring that after the pressure limiting member and valve core 3 separate, the valve body 2 cannot move further downward, thereby ensuring sufficient free movement space above the valve core 3. It is understood that in other embodiments, the valve body 2 may also be supported and limited axially by the cover 10 or other components.

[0062] Furthermore, when the pressure regulating member 4 is in the second position, the valve core 3 abuts against the upper portion of the first annular portion 21, thereby increasing the stability of the valve core 3. A portion of the valve core 3 extends into the inner hole of the first annular portion 21, allowing the valve core 3 and the exhaust pipe 1 to abut against each other, while the first annular portion 21 and the exhaust pipe 1 are separated from each other, ensuring that the valve core 3 can normally close the exhaust pipe 1.

[0063] Furthermore, at least one of the top of the exhaust pipe 1 and the bottom of the first annular portion 21 is provided with a guide structure 11. The radial dimension of the guide structure 11 gradually decreases from top to bottom. The exhaust pipe 1 and the first annular portion 21 are supported against each other by the guide structure 11, providing automatic alignment, ensuring that the center of the first annular portion 21 is aligned with the center of the exhaust pipe 1, thereby enhancing the stability of the valve body 2.

[0064] Furthermore, a second annular portion 22 is provided within the valve body 2, projecting axially from the top wall of the valve body 2. The second annular portion 22 surrounds the outer circumference of the valve core 3, thereby providing radial positioning for the valve core 3 and preventing it from deviating from the exhaust pipe 1 and affecting the proper closure of the exhaust pipe 1. Furthermore, the inner hole of the second annular portion 22 can directly serve as a guide hole 23 for the pressure regulating member 4, improving the relative positioning accuracy of the valve core 3 and the pressure regulating member 4 while also making the overall structure of the pressure-limiting valve more compact.

[0065] Furthermore, the second annular portion 22 and the first annular portion 21 are spaced apart from each other to form an exhaust gap. The exhaust gap is a closed annular structure, forming a larger exhaust area, so that the gas discharged from the exhaust pipe 1 can be quickly diffused and released, and the pressure in the pot can be quickly reduced.

[0066] In addition, an embodiment of the present application further provides a pressure cooker, which includes a pot body and any one of the pressure cooker lids provided in the embodiments of the present application. The pressure cooker lid is movably connected to the pot body and can be sealed with the pot body.

[0067] The above description is merely a preferred embodiment of the present application and is not intended to limit the present application. Various modifications and variations are possible for those skilled in the art. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present application shall be included within the scope of protection of the present application.

Claims

1. A pressure limiting valve, characterized in that: include: exhaust pipe (1); The valve body (2) is a cavity-shaped structure with an opening facing downward, and the valve body (2) is sleeved on the exhaust pipe (1); A valve core (3) is located inside the valve body (2), the valve core (3) is arranged at the top of the exhaust pipe (1), and the valve core (3) moves along the axial direction of the exhaust pipe (1) to open or close the exhaust pipe (1); A pressure regulating member (4) is movably connected to the valve body (2), and the pressure regulating member (4) has a first position and a second position; When the pressure regulating member (4) is located at the first position, the pressure regulating member (4) and the valve core (3) are separated from each other, and the valve core (3) moves independently; When the pressure regulating member (4) is located at the second position, the pressure regulating member (4) is connected to the valve core (3), and the valve body (2) moves along with the valve core (3).

2. The pressure limiting valve according to claim 1, characterized in that The pressure regulating member (4) is arranged above the valve core (3), and the pressure regulating member (4) moves along the axial direction of the valve body (2); When the pressure regulating member (4) is located at the first position, a gap is formed between the pressure regulating member (4) and the valve core (3); When the pressure regulating member (4) is located at the second position, the pressure regulating member (4) abuts against the upper portion of the valve core (3).

3. The pressure limiting valve according to claim 2, characterized in that The pressure-limiting valve further comprises a switching switch (5), wherein the switching switch (5) is located outside the valve body (2), and the switching switch (5) is arranged on the top of the valve body (2); The pressure regulating member (4) is located in the valve body (2), a portion of the pressure regulating member (4) passes through the top of the valve body (2) and is connected to the switching switch (5), and the switching switch (5) adjusts the pressure regulating member (4) to the first position or the second position.

4. The pressure limiting valve according to claim 3, characterized in that The switching switch (5) is hinged to the pressure regulating member (4), and the switching switch (5) comprises a first supporting portion (51) and a second supporting portion (52), wherein the first supporting portion (51) and the second supporting portion (52) are sequentially arranged around the rotating shaft of the switching switch (5), and an outer edge of the first supporting portion (51) is farther away from the rotating shaft of the switching switch (5) than an outer edge of the second supporting portion (52); When the first supporting portion (51) abuts against the top of the valve body (2), the pressure regulating member (4) is located at the first position; When the second supporting portion (52) abuts against the top of the valve body (2), the pressure regulating member (4) is located at the second position.

5. The pressure limiting valve according to claim 2, characterized in that: An elastic member (6) is provided between the pressure regulating member (4) and the valve body (2), and two ends of the elastic member (6) elastically press against the top wall of the valve body (2) and the pressure regulating member (4) respectively, so as to force the pressure regulating member (4) to move downward.

6. The pressure limiting valve according to any one of claims 1 to 5, characterized in that: A first annular portion (21) is provided inside the valve body (2), and the first annular portion (21) protrudes from the inner wall of the valve body (2) along the radial direction of the valve body (2); The valve core (3) is located above the first annular portion (21), and the inner hole of the first annular portion (21) is smaller than the diameter of the valve core (3).

7. The pressure limiting valve according to claim 6, characterized in that The exhaust pipe (1) is located below the first annular portion (21), and the inner hole of the first annular portion (21) is smaller than the outer diameter of the exhaust pipe (1); When the pressure regulating member (4) is located at the first position, the first annular portion (21) abuts against the exhaust pipe (1).

8. The pressure limiting valve according to claim 7, characterized in that At least one of the top of the exhaust pipe (1) and the bottom of the annular portion is provided with a guide structure (11); Along the direction from bottom to top, the radial dimension of the guide structure (11) gradually decreases, and the exhaust pipe (1) and the first annular portion (21) abut against each other through the guide structure (11).

9. The pressure limiting valve according to any one of claims 1 to 5, characterized in that: A second annular portion (22) is provided inside the valve body (2), and the second annular portion (22) protrudes from the top wall of the valve body (2) along the axial direction of the valve body (2), and the second annular portion (22) surrounds the outer periphery of the valve core (3).

10. A pressure cooker lid, characterized in that: It comprises a cover body and the pressure limiting valve according to any one of claims 1 to 9, wherein the exhaust pipe (1) is passed through the cover body and is sealed with the cover body.

11. A pressure cooker, characterized in that: The pressure cooker comprises a pot body and the pressure cooker cover according to claim 10, wherein the pressure cooker cover is movably connected to the pot body and can achieve sealing cooperation with the pot body.

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