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; at least one part of the valve element is located above the exhaust pipe, and the valve element can move in the axial direction of the exhaust pipe so as to open or close the exhaust pipe; the pressure regulating assembly is arranged above the valve element and can move in the direction close to or away from the valve element so as to loosen or abut against the valve element; the pressure adjusting assembly can elastically stretch out and draw back in the axial direction of the exhaust pipe, so that when the pressure adjusting assembly abuts against the valve element, the valve element can move upwards, and the exhaust pipe is opened. The pressure regulating stability of the pressure limiting valve can be improved, so that 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, which are secured to each other using mechanisms such as flanges. The pressure lid typically has a pressure relief valve to limit the cooking pressure inside the pot. Generally, different ingredients require different cooking pressures, hence the development of pressure relief valves with adjustable pressure values. However, current technology generally adjusts the pressure value of the pressure relief valve by changing the preload of a spring. This type of valve tends to have large pressure fluctuations, which can easily lead to splashing during cooking, affecting 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 stability of pressure regulation by the pressure relief valve, 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, at least a portion of which is located above the exhaust pipe, is movable along the axial direction of the exhaust pipe to open or close the exhaust pipe.

[0007] A pressure regulating component is disposed above the valve core and is capable of moving toward or away from the valve core to release or engage the valve core.

[0008] The pressure regulating component can elastically extend and retract along the axial direction of the exhaust pipe, so that when the pressure regulating component abuts against the valve core, the valve core can move upward and open the exhaust pipe.

[0009] The pressure relief valve provided in this application includes an exhaust pipe, a valve core, and a pressure regulating assembly. At least a portion of the valve core is located above the exhaust pipe, and the valve core is capable of moving axially along the exhaust pipe to open or close the exhaust pipe. The pressure regulating assembly is located above the valve core and is capable of moving towards or away from the valve core to release or abut against the valve core, thereby adjusting the pressure value of the pressure relief valve. The pressure regulating assembly is capable of elastically extending and retracting along the axial direction of the exhaust pipe, so that when the pressure regulating assembly abuts against the valve core, the valve core can move upward and open the exhaust pipe. When the pressure regulating component releases the valve core, the pressure relief valve is in the low-pressure position. The valve core moves independently along the axial direction of the exhaust pipe, and the pressure value of the pressure relief valve is determined by the gravity of the valve core and other components. Since gravity remains constant, the stability of the pressure value of the pressure relief valve in the low-pressure position can be guaranteed. When the pressure regulating component abuts against the valve core, the pressure relief valve is in the high-pressure position. The valve core moves along the axial direction of the exhaust pipe. At the same time, the pressure regulating component elastically expands and contracts along the axial direction of the exhaust pipe with the valve core. The pressure value of the pressure relief valve is jointly determined by the gravity of the valve core and the elastic force of the expansion and contraction of the pressure regulating component. At this time, the pressure value of the pressure relief valve is higher. Even if the elastic force of the pressure regulating component changes due to expansion and contraction, this change in elastic force is not enough to cause a large fluctuation in the pressure value of the pressure relief valve, thereby improving the stability of the pressure value of the pressure relief valve in the high-pressure position.

[0010] Optionally, the pressure limiting valve further includes a valve body, and the pressure regulating assembly includes: an adjusting seat connected to the valve body and movable along the valve body; a clamping member for abutting the valve core, the clamping member being slidably connected to the adjusting seat; and an elastic member disposed between the clamping member and the adjusting seat to force the clamping member and the adjusting seat to move away from each other. Both the adjusting seat and the clamping member are rigid components that are not easily deformed. By providing an elastic member between the two rigid components, the pressure regulating assembly can elastically expand and contract, rather than directly using an elastic material for the pressure regulating assembly. This reduces deformation and other damage to the pressure regulating assembly itself during use, extending the service life of the pressure regulating assembly.

[0011] Optionally, the elastic element is disposed between the valve body and the clamping element, with its two ends elastically abutting against the top of the valve body and the clamping element, respectively. When the pressure regulating assembly releases the valve core, the clamping element provides a downward pulling force to the adjusting seat, and the elastic element pushes the clamping element downward, forcing the adjusting seat to move downward and press against the valve body, preventing the adjusting seat from vibrating or shaking and generating excessive noise when the pressure limiting valve is in the low-pressure position. When the pressure regulating assembly abuts against the valve core, the valve core provides an upward supporting force to the clamping element, causing the clamping element to release its pulling force on the adjusting seat. The extension and retraction elasticity of the pressure regulating assembly is determined by the distance between the valve core and the top of the valve body. Even if external forces cause the adjusting seat to vibrate or shake, it will not affect the extension and retraction elasticity, thereby improving the stability of the pressure value of the pressure limiting valve in the high-pressure position.

[0012] Optionally, the valve body includes a first support portion and a second support portion, the height of the first support portion being greater than the height of the second support portion, and the first support portion and the second support portion being spaced apart around the axis of the exhaust pipe; the adjusting seat is provided with a mating portion, which can be connected to the first support portion or the second support portion as the adjusting seat rotates. The adjusting member switches between the first support portion and the second support portion through rotational movement, ensuring that the pressure regulating component is always directly aligned with the valve core during the movement of the adjusting member.

[0013] Optionally, the adjusting seat is stacked on top of the valve body, and the mating part protrudes from the lower surface of the adjusting seat; the top surface of the valve body is provided with a groove, the top surface of the valve body is the first support part, and the bottom of the groove is the second support part; when the mating part is connected to the second support part, the mating part is inserted into the groove. On the one hand, both the first support part and the second support part are upward-facing surfaces, and the mating part is overlapped with both the first support part and the second support part, thus simplifying the overall structure of the pressure relief valve; on the other hand, the insertion and engagement of the mating part with the groove provides a reliable limiting effect on the adjusting seat, enabling the pressure relief valve to be stably and reliably maintained at the high-pressure position, preventing the adjusting seat from rotating automatically under external forces, which would cause a change in the pressure value of the pressure relief valve.

[0014] Optionally, the pressure-limiting valve further includes a valve body, the valve body having an internal valve cavity, and an exhaust port communicating with the valve cavity on one side of the valve body; the exhaust pipe passes through the bottom of the valve body and communicates with the valve cavity; the pressure regulating component passes through the top of the valve body and is movable along the valve body. On the one hand, both the exhaust pipe and the valve core are installed with the valve body as a reference, which can better ensure the positional accuracy of the mutual cooperation between the pressure regulating component and the valve core; on the other hand, the gas discharged from the exhaust pipe first enters the valve cavity and then is discharged to the outside atmosphere through the exhaust port, preventing high-temperature gas from directly spraying out and scalding the user.

[0015] Optionally, the valve body includes: a base through which the exhaust pipe passes; and a top cover through which the pressure regulating component passes. The top cover is positioned above the base and is slidably connected to the base along the radial direction of the exhaust pipe, forming the valve cavity with the base. This simplifies the assembly and disassembly of the pressure-limiting valve and ensures that the height of the top cover remains unchanged during installation, maintaining a preset distance between the pressure regulating component and the valve core.

[0016] Optionally, the valve core includes: a sealing portion located above the exhaust pipe to open or close the exhaust pipe; and an extension rod disposed below the sealing portion, the extension rod passing through the exhaust pipe and forming an annular gap with the exhaust pipe. The inner hole of the exhaust pipe directly serves as a guide structure for the valve core, which can improve the relative positional accuracy between the valve core and the exhaust pipe, ensuring that the valve core can accurately close the exhaust pipe, and can also make full use of the internal space of the exhaust pipe, reducing the volume of the valve core exposed in the exhaust pipe, thereby improving the compactness of the overall structure of the pressure relief valve.

[0017] Optionally, the pressure relief valve further includes a counterweight located below the exhaust pipe and connected to the extension rod. On one hand, the heavier counterweight, located inside the lid, reduces the volume of the pressure relief valve protruding from the lid, thus improving the appearance of the pressure cooker lid. On the other hand, by increasing the weight of the counterweight to meet the pressure requirements of the pressure relief valve, the weight and volume of the valve core itself can be reduced, further reducing the volume of the pressure relief valve protruding from the lid and improving the appearance of the pressure cooker lid.

[0018] 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. When the pressure regulating component releases the valve core, the pressure-limiting valve is in a low-pressure position. The valve core moves independently along the axial direction of the exhaust pipe, and the pressure value of the pressure-limiting valve is determined by the gravity of the valve core and other components. Since gravity remains constant, the stability of the pressure value of the pressure-limiting valve in the low-pressure position can be ensured. When the pressure regulating component abuts against the valve core, the pressure-limiting valve is in a high-pressure position. The valve core moves along the axial direction of the exhaust pipe, and simultaneously, the pressure regulating component elastically expands and contracts along the axial direction of the exhaust pipe with the valve core. The pressure value of the pressure-limiting valve is jointly determined by the gravity of the valve core and the elastic force of the expansion and contraction of the pressure regulating component. At this time, the pressure value of the pressure-limiting valve is relatively high. Even if the elastic force of the pressure regulating component changes due to expansion and contraction, this change in elastic force is insufficient to cause a large fluctuation in the pressure value of the pressure-limiting valve, thereby improving the stability of the pressure value of the pressure-limiting valve in the high-pressure position.

[0019] 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, wherein the pressure cooker lid is fitted onto the pot body. When the pressure regulating component releases the valve core, the pressure limiting valve is in the low-pressure position, and the valve core moves independently along the axial direction of the exhaust pipe. The pressure value of the pressure limiting valve is determined by the gravity of the valve core and other components. Since gravity remains constant, the stability of the pressure value of the pressure limiting valve in the low-pressure position can be guaranteed. When the pressure regulating component abuts against the valve core, the pressure limiting valve is in the high-pressure position, and the valve core moves along the axial direction of the exhaust pipe. At the same time, the pressure regulating component elastically expands and contracts along the axial direction of the exhaust pipe with the valve core. The pressure value of the pressure limiting valve is jointly determined by the gravity of the valve core and the elastic force of the expansion and contraction of the pressure regulating component. At this time, the pressure value of the pressure limiting valve is relatively high. Even if the elastic force of the pressure regulating component changes due to expansion and contraction, this change in elastic force is insufficient to cause a large fluctuation in the pressure value of the pressure limiting valve, thereby improving the stability of the pressure value of the pressure limiting valve in the high-pressure position.

[0020] 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

[0021] Figure 1 This is a partial structural schematic diagram of a pressure relief valve provided in an embodiment of this application;

[0022] Figure 2 This is a schematic diagram of the internal structure of another pressure-limiting valve provided in an embodiment of this application;

[0023] Figure 3 This is a partial structural schematic diagram of another pressure relief valve provided in an embodiment of this application;

[0024] Figure 4 for Figure 3 The diagram shows the pressure relief valve with the valve body open.

[0025] Figure 5 Figure 4 Another angle view of the upper and middle cover section.

[0026] Figure label:

[0027] 1-Exhaust pipe;

[0028] 2-Valve core;

[0029] 21-Sealing part;

[0030] 22-Extension rod;

[0031] 3-Voltage regulating component;

[0032] 31-Adjusting seat;

[0033] 311 - Connecting hole;

[0034] 312 - Limit pin;

[0035] 313-Matching Section;

[0036] 32-Clamping element;

[0037] 321 - Connecting shaft;

[0038] 322-Limiting groove;

[0039] 33-Elastic element;

[0040] 4-Valve body;

[0041] 4a - Base;

[0042] 4b - Top cover;

[0043] 41-First support section;

[0044] 42-Second support section;

[0045] 43-groove;

[0046] 44 - Valve chamber;

[0047] 45 - Exhaust port;

[0048] 5-Counterweight;

[0049] 6-nut;

[0050] 7-Lid body.

[0051] 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

[0052] 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.

[0053] 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.

[0054] 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.

[0055] like Figures 1-5 As shown, this application embodiment provides a pressure-limiting valve that can be applied to a lid 7 and together with the lid 7 constitute a pressure cooker lid. The pressure-limiting valve includes an exhaust pipe 1, a valve core 2, and a pressure regulating component 3. The exhaust pipe 1 is used to connect the inner and outer sides of the lid 7. That is, the exhaust pipe 1 passes through the lid 7 in the vertical direction and is sealed with the lid 7 to form an exhaust channel connecting the inner and outer sides of the lid 7. When the exhaust pipe 1 is open, the gas inside the pot can be discharged to the outside of the pot through the pressure-limiting valve. At least a portion of the valve core 2 is located above the exhaust pipe 1. The valve core 2 can move axially along the exhaust pipe 1 to open or close the exhaust pipe 1. The pressure regulating component 3 is disposed above the valve core 2 and can move towards or away from the valve core 2 to release or abut against the valve core 2, thereby adjusting the pressure value of the pressure-limiting valve. The pressure regulating component 3 can elastically extend and retract along the axial direction of the exhaust pipe 1 so that when the pressure regulating component 3 abuts against the valve core 2, the valve core 2 can move upward and open the exhaust pipe 1.

[0056] like Figure 1 and Figure 2 As shown, when the pressure regulating component 3 releases the valve core 2 (refer to...) Figure 2 When the pressure relief valve is in the low-pressure position, the valve core 2 moves independently along the axial direction of the exhaust pipe 1. The pressure value of the pressure relief valve is determined by the gravity of the valve core 2 and other components. Since gravity remains constant, the stability of the pressure value of the pressure relief valve in the low-pressure position can be guaranteed. When the pressure regulating component 3 abuts against the valve core 2 (refer to...), Figure 1 When the pressure relief valve is in the high-pressure position, the valve core 2 moves along the axial direction of the exhaust pipe 1. At the same time, the pressure regulating component 3 elastically expands and contracts along the axial direction of the exhaust pipe 1 with the valve core 2. The pressure value of the pressure relief valve is determined by the weight of the valve core 2 and the elastic force of the expansion and contraction of the pressure regulating component 3. At this time, the pressure value of the pressure relief valve is relatively high. Even if the elastic force of the pressure regulating component 3 changes due to expansion and contraction, the change in elastic force is not enough to cause a large fluctuation in the pressure value of the pressure relief valve, thereby improving the stability of the pressure value of the pressure relief valve in the high-pressure position.

[0057] Specifically, under natural conditions, under the influence of gravity (e.g., at low pressure), or under the combined action of gravity and the elastic force of the pressure regulating component 3 (e.g., at high pressure), the valve core 2 seals against the top of the exhaust pipe 1, thereby closing the exhaust pipe 1 and allowing the pot to achieve the desired high pressure state, meeting the requirements for high-pressure cooking. When the pressure inside the pot is too high, under the action of the gas pressure inside the pot, the valve core 2 moves upward, thereby opening the exhaust pipe 1, allowing the gas inside the pot to be released outside, thus reducing the pressure inside the pot.

[0058] Furthermore, the valve core 2 includes a sealing portion 21 and an extension rod 22. The sealing portion 21 is located above the exhaust pipe 1 to open or close the exhaust pipe 1; the extension rod 22 is located below the sealing portion 21, passes through the exhaust pipe 1, and forms an annular gap with the exhaust pipe 1. The inner hole of the exhaust pipe 1 directly serves as a guide structure for the valve core 2, which can improve the relative positional accuracy between the valve core 2 and the exhaust pipe 1, ensuring that the valve core 2 can accurately close the exhaust pipe 1, and can also make full use of the internal space of the exhaust pipe 1, reducing the volume of the valve core 2 exposed outside the exhaust pipe 1, thereby improving the compactness of the overall structure of the pressure relief valve. It is understood that in other embodiments, a dedicated guide structure may also be provided on the outer periphery of the exhaust pipe 1.

[0059] Furthermore, the sealing part 21 can be provided with a conical or arcuate surface on the side facing the exhaust pipe 1, forming a sealing fit with the exhaust pipe 1 through the conical or arcuate surface. On the one hand, this can reduce the sealing area and increase the reliability of the sealing fit; on the other hand, it can play a role in automatic centering, preventing the valve core 2 from deviating from the exhaust pipe 1 and affecting the sealing effect.

[0060] Furthermore, the pressure relief valve also includes a counterweight 5, which is located below the exhaust pipe 1 and connected to the extension rod 22. On the one hand, the heavier counterweight 5, located inside the lid 7, can reduce the volume of the pressure relief valve exposed outside the lid 7, thereby improving the appearance of the pressure cooker lid. On the other hand, by increasing the weight of the counterweight 5 to meet the pressure requirements of the pressure relief valve, the weight and volume of the valve core 2 itself can be reduced, further reducing the volume of the pressure relief valve exposed outside the lid 7 and improving the appearance of the pressure cooker lid.

[0061] Furthermore, the pressure relief valve also includes a valve body 4, with a pressure regulating component 3 passing through the valve body 4 and capable of moving along the valve body 4 so that the valve body 4 can move closer to or further away from the valve core 2; the valve body 4 and the exhaust pipe 1 are respectively fixedly connected to the cover 7 (see reference). Figure 1 Alternatively, valve body 4 is fixedly connected to exhaust pipe 1 (see reference). Figure 2The valve body 4 and the exhaust pipe 1 need to be kept relatively fixed. The valve body 4 provides support and positioning for the pressure regulating component 3, thereby improving the positional accuracy of the interaction between the pressure regulating component 3 and the exhaust pipe 1. This ensures that the pressure regulating component 3 is directly facing the exhaust pipe 1, preventing it from deviating from one side of the exhaust pipe 1, and also ensures that the pressure regulating component 3 has the expected elastic force when it abuts against the exhaust pipe 1, thus meeting the pressure value of the high-pressure setting of the pressure relief valve. Understandably, in other embodiments, the pressure regulating component 3 can also be directly and movably connected to the cover 7 and move along the cover 7.

[0062] Specifically, when the exhaust pipe 1 and the valve body 4 are fixedly connected to the cover 7, the exhaust pipe 1 and the valve body 4 can be detachably connected to the cover 7 by means of nuts 6, clips, etc., or they can be connected to the cover 7 by means of welding or integral molding, etc., which are non-detachable. When the valve body 4 is fixedly connected to the exhaust pipe 1, the valve body 4 can be connected to the exhaust pipe 1 by any appropriate means such as nuts 6, clips, welding, or integral molding.

[0063] Furthermore, the pressure regulating assembly 3 includes an adjusting seat 31, a clamping member 32, and an elastic member 33. The adjusting seat 31 is connected to the valve body 4 and can move along the valve body 4. That is, the adjusting seat 31 is used to adjust the height position of the pressure regulating assembly 3, so that the pressure regulating assembly 3 as a whole moves closer to or further away from the valve core 2. The clamping member 32 is used to abut against the valve core 2. The clamping member 32 is slidably connected to the adjusting seat 31, so that when the clamping member 32 abuts against the valve core 2, the clamping member 32 can move upward with the valve core 2 and open the exhaust pipe 1. The elastic member 33 (e.g., a spring) is disposed between the clamping member 32 and the adjusting seat 31 to force the clamping member 32 and the adjusting member to move away from each other, so that the pressure regulating assembly 3 has elasticity and realizes elastic expansion and contraction. Both the adjusting seat 31 and the clamping member 32 are rigid parts that are not easily deformed. By setting an elastic member 33 between the two rigid parts, the pressure regulating component 3 can elastically expand and contract, instead of directly making the pressure regulating component 3 with an elastic material. This can reduce the deformation and other damage caused by the pressure regulating component 3 itself during use and extend the service life of the pressure regulating component 3.

[0064] Specifically, the bottom of the adjusting seat 31 is provided with a connecting hole 311 extending in the height direction, and the top of the clamping member 32 is provided with a connecting shaft 321 extending in the height direction. The connecting shaft 321 is inserted into the connecting hole 311 and can slide along the axial direction of the connecting hole 311, thereby realizing the sliding fit between the clamping member 32 and the adjusting seat 31. The connecting shaft 321 can be provided with a limiting groove 322, which is a through groove that passes radially through the connecting shaft 321 and extends along the axial direction of the connecting shaft 321. The adjusting seat 31 can be equipped with a limiting pin 312, which passes through the limiting groove 322, thereby limiting the sliding stroke of the clamping member 32 along the adjusting seat 31 and preventing the clamping member 32 from falling off the adjusting seat 31.

[0065] Furthermore, at least a portion of the adjusting seat 31 is located outside the valve body 4, allowing the user to directly grasp the adjusting seat 31 and adjust the height of the pressure regulating component 3 without the need for a dedicated operating switch. This simplifies the structure of the pressure limiting valve and improves the user's convenience in operating the adjusting component.

[0066] Furthermore, the elastic element 33 is disposed between the valve body 4 and the clamping element 32. The two ends of the elastic element 33 elastically abut against the top of the valve body 4 and the clamping element 32, respectively, so that the valve body 4 provides a downward force to the clamping element 32 through the elastic element 33. When the pressure regulating assembly 3 releases the valve core 2, the clamping element 32 provides a downward pulling force to the regulating seat 31. The elastic element 33 pushes the clamping element 32 downward, forcing the regulating seat 31 to move downward and press against the valve body 4, preventing the regulating seat 31 from vibrating or shaking and generating large noise when the pressure limiting valve is in the low pressure position. When the pressure regulating component 3 abuts against the valve core 2, the valve core 2 provides an upward supporting force to the clamping member 32, causing the clamping member 32 to release the pulling force on the adjusting seat 31. The extension and retraction elasticity of the pressure regulating component 3 is determined by the distance between the valve core 2 and the top of the valve body 4. Even if the adjusting seat 31 vibrates or shakes under the action of external forces, it will not affect the extension and retraction elasticity, thereby improving the stability of the pressure value of the pressure relief valve at the high pressure position.

[0067] Furthermore, the adjusting seat 31 is provided with at least two mating parts 313, and the valve body 4 includes a first support part 41 and a second support part 42, wherein the height of the first support part 41 is greater than the height of the second support part 42. As the adjusting seat 31 moves, the mating parts 313 can be connected to (e.g., snap-fit, plug-in, or any suitable connection method) the first support part 41 or the second support part 42, thereby adjusting the height position of the pressure regulating component 3, so that the pressure regulating component 3 moves closer to or further away from the valve core 2. Specifically, when the mating part 313 is connected to the higher first support part 41, the overall height of the pressure regulating component 3 increases, and the pressure regulating component 3 releases the valve core 2; when the mating part 313 is connected to the lower second support part 42, the overall height of the pressure regulating component 3 decreases, and the pressure regulating component 3 abuts against the valve core 2.

[0068] Furthermore, the first support portion 41 and the second support portion 42 are spaced apart around the axis of the exhaust pipe 1. The adjusting member switches between the first support portion 41 and the second support portion 42 through rotational movement, which ensures that the pressure regulating component 3 is always directly facing the valve core 2 during the movement of the adjusting member.

[0069] Furthermore, the adjusting seat 31 is stacked on top of the valve body 4, and the mating part 313 protrudes from the lower surface of the adjusting seat 31. The top surface of the valve body 4 is provided with a groove 43, the top surface of the valve body 4 is the first support part 41, and the bottom of the groove 43 is the second support part 42. Both the first support part 41 and the second support part 42 are upward-facing surfaces, and the mating part 313 and the first support part 41, as well as the mating part 313 and the second support part 42, are overlapped to simplify the overall structure of the pressure relief valve.

[0070] Furthermore, when the mating part 313 is connected to the second support part 42, the mating part 313 engages with the groove 43. This provides a reliable limiting effect on the adjusting seat 31, ensuring that the pressure relief valve can be stably and reliably maintained at the high pressure position, preventing the adjusting seat 31 from rotating automatically under external forces, which would cause a change in the pressure value of the pressure relief valve.

[0071] like Figures 2-5 As shown, the valve body 4 further includes a valve cavity 44 inside, and an exhaust port 45 communicating with the valve cavity 44 on one side of the valve body 4. An exhaust pipe 1 passes through the bottom of the valve body 4 and communicates with the valve cavity 44; a pressure regulating component 3 passes through the top of the valve body 4 and can move along the exhaust pipe 1. On one hand, the exhaust pipe 1 and the valve core 2 are both installed with the valve body 4 as a reference, which can better ensure the positional accuracy of the cooperation between the pressure regulating component 3 and the valve core 2. Specifically, the mounting holes coaxially arranged at the top and bottom of the valve body 4 can ensure that the pressure regulating component 3 and the exhaust pipe 1 are coaxially arranged. Furthermore, the top and bottom of the valve body 4 respectively serve as axial limiting mechanisms, ensuring that the pressure regulating component 3 has the expected elastic force value when it abuts against the valve core 2. On the other hand, the gas discharged from the exhaust pipe 1 first enters the valve cavity 44 and then is discharged to the outside atmosphere along the exhaust port 45, preventing high-temperature gas from directly spraying out and scalding the user.

[0072] Furthermore, the valve body 4 includes a detachably connected base 4a and a top cover 4b. For example, the base 4a and the top cover 4b can be connected to each other by any suitable means such as threads or snaps, forming a valve cavity 44. The exhaust pipe 1 passes through the base 4a, meaning that the assembly of components such as the exhaust pipe 1 and the valve core 2 is performed on the base 4a. The pressure regulating component 3 passes through the top cover 4b, meaning that the assembly of the pressure regulating component 3 is performed on the top cover 4b. Finally, the top cover 4b is connected to the base 4a to complete the assembly of the pressure limiting valve. This avoids assembling components in the confined space of the valve cavity 44, improving the convenience of pressure limiting valve assembly. Moreover, when cleaning or maintenance of the pressure limiting valve is required, only the top cover 4b and the base 4a need to be separated, without further disassembly of components such as the pressure regulating component 3, further improving the convenience of pressure limiting valve cleaning.

[0073] Furthermore, the upper cover 4b is slidably connected to the base 4a, and the sliding direction of the upper cover 4b is radial to the exhaust pipe 1. On the one hand, this ensures that the height of the upper cover 4b does not change during installation, thereby ensuring that the pressure regulating component 3 and the valve core 2 maintain a preset distance; on the other hand, the sliding installation and disassembly operation is simpler and more efficient, which can improve the efficiency of the pressure relief valve assembly and disassembly operation.

[0074] In addition, this application embodiment also provides a pressure cooker lid, which includes a lid body 7 and any of the pressure limiting valves provided in this application embodiment. The vent pipe 1 of the pressure limiting valve passes through the lid body 7 and is sealed to the lid body 7.

[0075] In addition, this application embodiment also provides a pressure cooker, which includes a pot body and any pressure cooker lid provided in this application embodiment, wherein the pressure cooker lid is closed on the pot body.

[0076] 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-limiting valve, characterized by The pressure limiting valve comprises: an exhaust pipe (1); a valve core (2) located at least partially above the exhaust pipe (1), the valve core (2) being capable of moving along the axial direction of the exhaust pipe (1) to open or close the exhaust pipe (1); a pressure regulating assembly (3) arranged above the valve core (2) and capable of moving towards or away from the valve core (2) to loosen or abut against the valve core (2); the pressure regulating assembly (3) is capable of elastic expansion along the axial direction of the exhaust pipe (1) so that the valve core (2) can move upwards and open the exhaust pipe (1) when the pressure regulating assembly (3) abuts against the valve core (2).

2. The pressure-limiting valve according to claim 1, characterized in that The pressure limiting valve further comprises a valve body (4), and the pressure regulating assembly (3) comprises: an adjusting seat (31) connected to the valve body (4) and capable of moving along the valve body (4); a pressing member (32) for abutting against the valve core (2), the pressing member (32) being slidingly connected to the adjusting seat (31); a resilient member (33) arranged between the pressing member (32) and the adjusting seat (31) to force the pressing member (32) and the adjusting seat (31) to move away from each other.

3. The pressure-limiting valve according to claim 2, characterized in that The resilient member (33) is arranged between the valve body (4) and the pressing member (32), and both ends of the resilient member (33) are elastically abutted against the top of the valve body (4) and the pressing member (32), respectively.

4. The pressure-limiting valve according to claim 2, characterized in that The valve body (4) comprises a first support portion (41) and a second support portion (42), the height of the first support portion (41) is greater than the height of the second support portion (42), and the first support portion (41) and the second support portion (42) are spaced apart around the axis of the exhaust pipe (1); The adjusting seat (31) is provided with a matching portion (313), and the matching portion (313) can be connected to the first support portion (41) or the second support portion (42) as the adjusting seat (31) rotates.

5. The pressure-limiting valve according to claim 4, characterized in that The adjusting seat (31) is arranged above the valve body (4) in a stacked manner, and the matching portion (313) protrudes from the lower surface of the adjusting seat (31); The top surface of the valve body (4) is provided with a groove (43), the top surface of the valve body (4) is the first support portion (41), and the groove bottom of the groove (43) is the second support portion (42); When the matching portion (313) is connected to the second support portion (42), the matching portion (313) is inserted and matched with the groove (43).

6. The pressure-limiting valve according to claim 1, characterized in that The pressure limiting valve further comprises a valve body (4), and the inside of the valve body (4) is provided with a valve cavity (44), and one side of the valve body (4) is provided with an exhaust port (45) communicating with the valve cavity (44); The exhaust pipe (1) is arranged through the bottom of the valve body (4) and communicates with the valve cavity (44); The pressure regulating assembly (3) is arranged through the top of the valve body (4) and is capable of moving along the valve body (4).

7. The pressure-limiting valve according to claim 6, characterized in that The valve body (4) comprises: a base (4a), and the exhaust pipe (1) is arranged through the base (4a); an upper cover (4b), and the pressure regulating assembly (3) is arranged through the upper cover (4b); The upper cover (4b) is arranged above the base (4a), and the upper cover (4b) is slidably connected to the base (4a) along the radial direction of the exhaust pipe (1), and the upper cover (4b) and the base (4a) form the valve cavity (44).

8. Pressure-limiting valve according to any one of claims 1 to 7, characterized in that The valve core (2) comprises: A sealing part (21) is arranged above the exhaust pipe (1) to open or close the exhaust pipe (1); An extension rod (22) is arranged below the sealing part (21), and the extension rod (22) penetrates the exhaust pipe (1) and forms an annular gap with the exhaust pipe (1).

9. The pressure-limiting valve according to claim 8, characterized in that The pressure limiting valve further comprises a counterweight part (5) arranged below the exhaust pipe (1), and the counterweight part (5) is connected to the extension rod (22).

10. A pressure cooker lid characterized in that, The pressure limiting valve comprises a cover (7), and the exhaust pipe (1) penetrates the cover (7) and is in sealing cooperation with the cover (7).

11. A pressure cooker characterized in that The pressure cooker cover comprises a pot body, and the pressure cooker cover is arranged on the pot body.

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