Opening stopping valve, pressure cooker cover and pressure cooker

Abstract

The utility model provides an opening stopping valve, a pressure cooker cover and a pressure cooker, the opening stopping valve comprises an elastic valve seat, the elastic valve seat is provided with an exhaust hole, the lower end of the elastic valve seat is convexly provided with an annular sealing convex rib, and the sealing convex rib surrounds the exhaust hole; the valve body is arranged in the exhaust hole in a penetrating mode, an annular sealing flange is arranged on the periphery of the valve body in a protruding mode, and the sealing flange is located below the elastic valve seat; the valve body slides in the axial direction of the exhaust hole so that the sealing flange and the sealing convex rib can be attached to each other or separated from each other. The sealing performance of the opening stop valve can be improved, and 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 stop valve, a pressure cooker lid, and a pressure cooker. Background Technology

[0002] A pressure cooker is a common cooking appliance. Its main function is to increase the heating temperature by increasing the pressure inside the pot, thereby increasing the heating speed. A pressure cooker mainly consists of a pressure lid and a pot body. The lid and pot body are connected by a flange. The pressure lid usually has a check valve; when the check valve rises to form a seal, the pressure inside the pot can increase. In current technology, a sealing ring is usually installed around the valve body of the check valve. During use, the sealing ring may be improperly installed or twisted, leading to air leakage from the check valve and affecting the user experience of the pressure cooker. Utility Model Content

[0003] This application provides a check valve, a pressure cooker lid, and a pressure cooker to improve the sealing performance of the check valve and enhance the user experience of the pressure cooker.

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

[0005] The elastic valve seat is provided with an exhaust hole, and the lower end of the elastic valve seat is provided with an annular sealing rib, which surrounds the exhaust hole;

[0006] A valve body is provided through the exhaust port, and an annular sealing flange is provided on the outer periphery of the valve body. The sealing flange is located below the elastic valve seat.

[0007] The valve body slides axially along the exhaust port so that the sealing flange and the sealing rib can be fitted together or separated from each other.

[0008] The check valve provided in this application includes a resilient valve seat and a valve body. The resilient valve seat has a vent hole, and an annular sealing rib protrudes from the lower end of the resilient valve seat, surrounding the vent hole. The valve body passes through the vent hole, and an annular sealing flange protrudes from the outer periphery of the valve body, located below the resilient valve seat. The valve body slides axially along the vent hole, so that the sealing flange and the sealing rib can be engaged or disengaged, thereby closing or opening the vent hole. In other words, the sealing flange and the sealing rib cooperate to achieve sealing of the check valve, thereby improving the sealing performance of the check valve. On the one hand, the sealing rib has a small cross-section and low strength, so only a small clamping force is needed to achieve elastic fit between the sealing flange and the sealing rib, making it easy to form an elastic seal between them. On the other hand, the elastic valve seat has high strength and plays a reliable positioning and reinforcing role for the sealing rib, preventing the sealing rib from shifting or twisting, ensuring that the sealing rib maintains the expected position and shape, so that the sealing flange can fit more accurately with the sealing rib and ensure a reliable sealing effect.

[0009] Optionally, the vent includes a first section that penetrates the lower end of the resilient valve seat; the diameter of the first section gradually increases from bottom to top. On one hand, the vent gap is smaller at the bottom of the resilient valve seat, which prevents steam loss from the pot, allowing the pressure cooker to pressurize with lower heating power and reducing energy consumption. On the other hand, the vent gap gradually increases within the height range of the first section, allowing gas to be quickly released and preventing excessive pressure buildup inside the pot during opening and closing of the lid, which could affect the safety of the pressure cooker.

[0010] Optionally, the sealing rib is disposed at the edge of the first orifice. This reduces the deformation resistance of the sealing rib, increases its flexibility, thereby improving the sealing effect of the check valve, and also strengthens the first orifice, preventing damage such as cracking at the edge of the first orifice and extending the service life of the check valve.

[0011] Optionally, the vent hole includes a second section located above the first section, extending through the upper end of the resilient valve seat, with the diameter of the second section remaining constant. On one hand, by providing the second section, the axial dimension of the resilient valve seat can be increased, thereby increasing both the structural strength of the resilient valve seat itself and the mating depth between the valve body and the resilient valve seat, thus increasing the stability and reliability of the check valve. On the other hand, the constant diameter of the second section can guide the steam, causing it to spray vertically and preventing steam diffusion that could scald the user.

[0012] Optionally, the outer diameter of the sealing rib is larger than the diameter of the second hole section. At least a portion of the sealing rib is located outside the suspended structure, thereby ensuring that the resilient valve seat reliably positions and reinforces the sealing rib, preventing the sealing rib from accidentally flipping along with the suspended structure, which would affect the normal fit between the sealing flange and the sealing rib.

[0013] Optionally, the axial dimension of the second orifice is larger than that of the first orifice. The smaller axial dimension of the first orifice allows the exhaust gap to increase rapidly within a small height range, thereby increasing exhaust efficiency and ensuring that the gas in the exhaust gap can be discharged quickly; the larger axial dimension of the second orifice allows for more stable steam discharge, thereby maintaining stable temperature and pressure inside the pot and improving the cooking effect of the food.

[0014] Optionally, the vent hole has multiple protruding posts on its wall, extending axially along the vent hole and spaced circumferentially. These protrusions contact the outer wall of the valve body. This provides reliable radial positioning of the valve body, preventing it from wobbling or moving within the vent hole and ensuring a reliable seal. It also reduces the contact area between the valve body and the vent hole, decreasing the resistance to valve body movement and thus reducing the steam pressure required for pressure cooking. This shortens the pressure cooker's cooking time and improves its efficiency.

[0015] Optionally, the lower end of the resilient valve seat includes a spare sealing surface, which surrounds the outside of the sealing rib, and a portion of the sealing flange is located directly below the spare sealing surface. When the sealing rib fails due to wear or other reasons, the valve body can rise further, causing the sealing flange to fit against the spare sealing surface. In other words, even when the sealing rib fails, the valve body can still close the vent, enabling high-pressure cooking and thus extending the service life of the check valve.

[0016] Optionally, the valve body has a limiting flange protruding from its outer periphery. The limiting flange is located above the elastic valve seat, and at least a portion of the limiting flange extends beyond the edge of the vent hole. The limiting flange has at least one vent notch, and at least a portion of the vent notch is located within the edge of the vent hole. When the valve body descends, the limiting flange overlaps the elastic valve seat, providing support and limiting for the valve body and preventing it from falling out. At this time, the vent notch communicates with the vent hole, thus preventing the limiting flange from closing the vent hole during pressure relief, which could cause negative pressure inside the pressure cooker and affect the normal opening of the pressure cooker lid.

[0017] Optionally, the valve body is an integral structure, and the valve body has a valve cavity inside. The valve cavity has a pressure relief port and a mounting port at opposite ends. The inner diameter of the mounting port is smaller than the inner diameter of the valve cavity to form a stop step. The valve cavity contains: a valve core, which is slidably connected to the valve cavity to open or close the pressure relief port; and a conical spring, which is located at the end of the valve cavity away from the pressure relief port. The small end of the conical spring elastically abuts against the valve core, and the large end of the conical spring elastically abuts against the stop step. The valve body has no detachable connecting structures or components such as threads, which can avoid damage such as loosening or falling off due to vibration. This allows the valve body to better adapt to the vibration environment and extend the service life of the check valve. The conical spring with a larger diameter at the larger end can be screwed into a smaller installation port, making it easy to install and fix the conical spring. After the conical spring is installed, it is completely contained in the valve cavity, and the large end of the conical spring is located outside the area of ​​the installation port. Therefore, the conical spring also serves to close the installation port, ensuring that the valve core and other components in the valve cavity will not fall off.

[0018] Optionally, the lower end of the valve body is provided with at least one anti-clogging groove. The anti-clogging groove connects to the pressure relief port and extends radially along the valve body to penetrate its outer periphery. The width of the anti-clogging groove is smaller than the inner diameter of the pressure relief port. The anti-clogging groove can increase the air intake area, thereby increasing the airflow and allowing high-pressure gas in the pot to be discharged quickly. Furthermore, the anti-clogging groove acts as a barrier against large food particles, preventing them from clogging the pressure relief port and ensuring a smooth pressure relief channel.

[0019] A second aspect of this application provides a pressure cooker lid, comprising a lid body and any of the check valves provided in this application. The lid body has a through hole, and the resilient valve seat is sealingly connected to the through hole. On one hand, the sealing rib has a small cross-section and low strength, therefore only a small clamping force is needed to achieve elastic contact between the sealing flange and the sealing rib, making it easy to form an elastic seal between them. On the other hand, the resilient valve seat has high strength, providing reliable positioning and reinforcement for the sealing rib, preventing displacement or twisting of the sealing rib, ensuring it maintains its intended position and shape, and allowing the sealing flange to more accurately fit the sealing rib, guaranteeing a reliable sealing effect.

[0020] 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. On one hand, the sealing rib has a small cross-section and low strength, therefore only a small clamping force is required to achieve elastic contact between the sealing flange and the sealing rib, thus facilitating the formation of an elastic seal between the sealing flange and the sealing rib. On the other hand, the elastic valve seat has high strength, providing reliable positioning and reinforcement for the sealing rib, preventing displacement or twisting of the sealing rib, ensuring that the sealing rib maintains its intended position and shape, thereby allowing the sealing flange to more accurately fit against the sealing rib, ensuring a reliable sealing effect.

[0021] 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

[0022] Figure 1 This is a partial structural schematic diagram of the pressure cooker lid provided in an embodiment of this application;

[0023] Figure 2 A schematic diagram of a half-section of a pressure cooker lid provided in an embodiment of this application;

[0024] Figure 3 A three-dimensional structural schematic diagram of the check valve provided in the embodiments of this application;

[0025] Figure 4 for Figure 3 A schematic diagram of the check valve from another angle;

[0026] Figure 5 This is a schematic diagram of the structure of the resilient valve seat provided in the embodiments of this application;

[0027] Figure 6 A cross-sectional view of the check valve along the protrusion provided in the embodiment of this application;

[0028] Figure 7 This is a cross-sectional view of the check valve along the exhaust gap provided in an embodiment of this application.

[0029] Figure label:

[0030] 10-Check valve;

[0031] 20-Cap;

[0032] 30 - Display lever;

[0033] 40 - Safety components;

[0034] 1-Resilient valve seat;

[0035] 11-Exhaust port;

[0036] 111 - First borehole section;

[0037] 112 - Second hole section;

[0038] 113 - Convex column;

[0039] 12-Sealing ribs;

[0040] 13 - Spare sealing surface;

[0041] 2-Valve body;

[0042] 21-Sealing flange;

[0043] 22-Limiting flange;

[0044] 221 - Exhaust notch;

[0045] 23-Valve cavity;

[0046] 24 - Pressure relief port;

[0047] 25 - Installation port;

[0048] 26-Stop step;

[0049] 27-Anti-clogging groove;

[0050] 3-Valve core;

[0051] 4- Conical spring.

[0052] 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

[0053] 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.

[0054] 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.

[0055] 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.

[0056] like Figure 1 and Figure 2 As shown, this application embodiment provides a pressure cooker lid that can be fitted onto a pot body and together with the pot body constitute a pressure cooker. The pressure cooker lid includes a lid body 20 and a check valve 10. The lid body 20 has a through hole, and the check valve 10 is installed in the through hole. The check valve 10 has a sealing state and a pressure relief state. When the check valve 10 is in the sealing state, the pressure inside the pot can be increased, thereby achieving the requirement of high-pressure cooking; when the check valve 10 is in the pressure relief state, the pressure inside the pot can be released, thereby ensuring the safety of opening and closing the lid.

[0057] The pressure cooker lid may include a display rod 30 stacked above the check valve 10, with a portion of the display rod 30 protruding above the lid 20 to allow the user to easily monitor the current status of the check valve 10. When the display rod 30 is raised, the check valve 10 is in a sealed state; when the display rod 30 is lowered, the check valve 10 is in a depressurized state. The pressure cooker lid may also include a safety element 40, which is slidably connected to the lid 20 and can slide radially along the lid 20 to lock or release the check valve 10. When the safety element 40 locks the check valve 10, the check valve 10 cannot move freely up or down, thus remaining in a depressurized state to prevent accidental high pressure buildup inside the pot, which could affect the safety of the pressure cooker. When the safety element 40 releases the check valve 10, the check valve 10 can move freely up and down, thus forming a sealed state to meet the requirements of high-pressure cooking.

[0058] like Figures 2-7 As shown in the embodiment of this application, the check valve 10 includes a resilient valve seat 1 and a valve body 2. The resilient valve seat 1 can be made of a flexible material such as silicone. The resilient valve seat 1 is sealed to the through hole, thereby realizing the installation and fixation of the check valve 10 on the cover 20. The resilient valve seat 1 is provided with a vent hole 11. The valve body 2 can be made of a metal or alloy material such as aluminum. The valve body 2 passes through the vent hole 11 and can slide along the axial direction of the vent hole 11 to open or close the vent hole 11. When the valve body 2 closes the vent hole 11, the check valve 10 forms a sealed state, and the pressure inside the pressure cooker can increase, thereby meeting the requirements of high-pressure cooking; when the valve body 2 opens the vent hole 11, the check valve 10 forms a pressure relief state, and the pressure inside the pressure cooker can be released, thereby ensuring the safety of opening and closing the lid.

[0059] Furthermore, the lower end of the resilient valve seat 1 is provided with an annular sealing rib 12, which is integrally formed with the resilient valve seat 1 and surrounds the vent hole 11. The outer periphery of the valve body 2 is provided with an annular sealing flange 21, which is located below the resilient valve seat 1. The valve body 2 slides along the axial direction of the vent hole 11 so that the sealing flange 21 and the sealing rib 12 are engaged or disengaged, thereby closing or opening the vent hole 11. In other words, the sealing flange 21 and the sealing rib 12 cooperate with each other to achieve a seal on the check valve 10. On the one hand, the sealing rib 12 has a small cross-section and low strength, so only a small clamping force is needed to achieve elastic fit between the sealing flange 21 and the sealing rib 12, making it easy to form an elastic seal between the sealing flange 21 and the sealing rib 12; on the other hand, the elastic valve seat 1 has high strength, and the elastic valve seat 1 plays a reliable positioning and reinforcing role for the sealing rib 12, which can prevent the sealing rib 12 from shifting or twisting, and ensure that the sealing rib 12 maintains the expected position and shape, so that the sealing flange 21 can fit more accurately with the sealing rib 12, ensuring a reliable sealing effect.

[0060] Specifically, the sealing rib 12 protrudes from one end of the elastic valve seat 1 along the axial direction of the elastic valve seat 1, and at least a portion of the sealing flange 21 is located directly below the sealing rib 12. The sealing flange 21 and the sealing rib 12 are either fitted together or separated from each other along the axial direction of the elastic valve seat 1. When there is a certain amount of steam in the pot, the valve body 2 rises under the push of the steam, causing the sealing flange 21 and the sealing rib 12 to fit together. At this time, the end of the valve body 2 and the elastic valve seat 1 form a sealing fit, thereby closing the vent 11. The pressure inside the pot can be further increased to achieve high-pressure cooking. When the pressure inside the pot decreases, the valve body 2 descends due to its own gravity, causing the sealing flange 21 and the sealing rib 12 to separate. At this time, a gap is formed between the end of the valve body 2 and the elastic valve seat 1, thereby opening the vent 11, allowing the pressure inside the pot to be further released, ensuring the safety of opening and closing the lid.

[0061] In one embodiment, the sealing rib 12 has a semi-circular cross-section. When the valve body 2 rises and the sealing flange 21 contacts the sealing rib 12, a linear seal can be quickly formed between the sealing flange 21 and the sealing rib 12, thereby shortening the pressure cooker's pressurization time and improving the cooking effect of the pressure cooker. As the pressure inside the pressure cooker increases, the valve body 2 rises further, causing the sealing flange 21 to compress the sealing rib 12. The sealing flange 21 undergoes significant elastic deformation, thereby forming a surface seal between the sealing flange 21 and the sealing rib 12, ensuring a reliable sealing effect. Understandably, in other embodiments, the cross-section of the sealing rib 12 can be set to any suitable shape such as triangular, trapezoidal, or rectangular.

[0062] Furthermore, the lower end of the resilient valve seat 1 includes a reserved sealing surface 13, which surrounds the outside of the sealing rib 12, and a portion of the sealing flange 21 is located directly below the reserved sealing surface 13. The sealing rib 12 has a raised structure relative to the reserved sealing surface 13. When the sealing rib 12 fails due to wear or other reasons, the valve body 2 can rise further, so that the sealing flange 21 and the reserved sealing surface 13 fit together. That is to say, even when the sealing rib 12 fails, the valve body 2 can still close the exhaust port 11 to achieve high-pressure cooking, thereby extending the service life of the check valve 10.

[0063] Furthermore, a limiting flange 22 is provided on the outer periphery of the valve body 2, and at least a portion of the limiting flange 22 extends beyond the edge of the vent hole 11. When the valve body 2 descends, the limiting flange 22 overlaps the upper part of the elastic valve seat 1, thereby providing support and limiting for the valve body 2 and preventing the valve body 2 from falling out of the elastic valve seat 1. The limiting flange 22 is provided with at least one vent notch 221, and at least a portion of the vent notch 221 is located within the edge of the vent hole 11. When the limiting flange 22 overlaps the upper part of the elastic valve seat 1, the vent notch 221 communicates with the vent, thereby preventing the limiting flange 22 from closing the vent in the depressurization state, which would cause negative pressure to be generated inside the pressure cooker and affect the normal opening of the pressure cooker lid.

[0064] like Figures 5-7 As shown, furthermore, the vent hole 11 has multiple protruding posts 113 protruding from its wall. The protruding posts 113 extend axially along the vent hole 11, and are spaced apart circumferentially along the vent hole 11. The protruding posts 113 contact the outer wall of the valve body 2, forming venting gaps between adjacent protruding posts 113. This provides reliable radial positioning for the valve body 2, preventing it from shaking or moving within the vent hole 11, thus ensuring a reliable sealing effect. It also reduces the contact area between the valve body 2 and the vent hole 11, thereby reducing the resistance to the valve body 2's movement during lifting and lowering, and consequently reducing the steam pressure required for the valve body 2 to rise. This shortens the pressure-boosting time of the pressure cooker and improves its cooking efficiency.

[0065] Furthermore, the side of the protruding post 113 facing the axis of the exhaust port 11 is an outwardly convex arc surface, so that the protruding post 113 forms a linear contact with the outer wall of the valve body 2, thereby minimizing the contact area between the valve body 2 and the exhaust port 11, and minimizing the movement resistance of the valve body 2 in raising and lowering.

[0066] Furthermore, the vent 11 includes a first orifice 111 that penetrates the lower end of the resilient valve seat 1. Along the upward direction, the diameter of the first orifice 111 gradually increases; that is, along the upward direction, the venting gap between the valve body 2 and the first orifice 111 gradually increases. On the one hand, at the bottom of the resilient valve seat 1, the venting gap is smaller, which prevents steam loss from the pot, allowing the pressure cooker to pressurize with lower heating power and reduce energy loss. On the other hand, within the height range of the first orifice 111, the venting gap gradually increases, allowing the gas in the venting gap to be quickly discharged, preventing excessive pressure buildup inside the pot during opening and closing operations, which could affect the safety of the pressure cooker.

[0067] Furthermore, the vent 11 includes a second section 112, which is located above the first section 111 and extends through the upper end of the resilient valve seat 1. The diameter of the second section 112 remains constant, meaning that the venting gap between the valve body 2 and the second section 112 remains constant along the bottom-up direction. On the one hand, by providing the second section 112, the axial dimension of the resilient valve seat 1 can be increased, which can increase both the structural strength of the resilient valve seat 1 itself and the mating depth between the valve body 2 and the resilient valve seat 1, thereby increasing the stability and reliability of the check valve 10. On the other hand, the constant diameter of the second section 112 can guide the steam, causing it to spray out vertically and preventing steam diffusion that could scald the user.

[0068] Furthermore, the axial dimension of the second orifice 112 is larger than that of the first orifice 111. The smaller axial dimension of the first orifice 111 allows the exhaust gap to increase rapidly within a small height range, thereby increasing exhaust efficiency and ensuring that the gas in the exhaust gap can be discharged quickly; the larger axial dimension of the second orifice 112 allows for more stable steam discharge, thereby maintaining stable temperature and pressure inside the pot and improving the cooking effect of the food.

[0069] Furthermore, the sealing rib 12 is disposed at the edge of the first hole section 111. That is, the inner diameter of the sealing rib 12 is consistent with the minimum diameter of the first hole section 111, and the inner edge of the sealing rib 12 is aligned with the lower edge of the first hole section 111. This not only reduces the deformation resistance of the sealing rib 12 and increases its flexibility, thereby improving the sealing effect of the check valve 10, but also strengthens the first hole section 111, thus preventing damage such as cracking at the edge of the first hole section 111 and extending the service life of the check valve 10. Specifically, along the top-to-bottom direction, the elastic valve seat 1 gradually extends inward from the first hole section 111 to form a suspended structure. The sealing rib 12 is set at the edge of the first hole section 111, so that the sealing rib 12 is supported on the suspended structure, thereby increasing the flexibility of the sealing rib 12. The elastic valve seat 1 is thinner closer to the edge of the first hole section 111. By setting the sealing rib 12 at the edge of the first hole section 111, the edge thickness of the first hole section 111 can be increased, thereby preventing the edge of the first hole section 111 from cracking or being damaged.

[0070] Furthermore, the outer diameter of the sealing rib 12 is larger than the diameter of the second hole section 112, meaning that the outer edge of the sealing rib 12 falls outside the cross-section of the second hole section 112. At least a portion of the sealing rib 12 is located outside the suspended structure, thereby ensuring that the resilient valve seat 1 reliably positions and reinforces the sealing rib 12, preventing the sealing rib 12 from flipping or other accidents along with the suspended structure, which would affect the normal fit between the sealing flange 21 and the sealing rib 12.

[0071] like Figure 6 and Figure 7 As shown, the valve body 2 further includes a valve cavity 23 inside, with a pressure relief port at one end. A valve core 3 and an elastic element (e.g., a spring) are installed inside the valve cavity 23. The valve core 3 is slidably connected to the valve cavity 23 to open or close the pressure relief port 24. The elastic element elastically abuts against the end of the valve core 3 away from the pressure relief port 24, forcing the valve core 3 to slide towards the pressure relief port. In other words, during normal use of the pressure cooker, the valve core 3 is in the closed pressure relief port state, allowing the pressure cooker to achieve normal high-pressure cooking. When an abnormality occurs, such as blockage of the vent 11, causing excessive pressure inside the pressure cooker (e.g., when the vent 11 is blocked), the high-pressure gas pushes the valve core 3 to slide away from the pressure relief port, thereby opening the pressure relief port 24. The pressure inside the cooker is released through the pressure relief port 24, thus ensuring the safe use of the pressure cooker.

[0072] Furthermore, the valve body 2 is a one-piece structure, meaning that it does not have any detachable connecting structures or components such as threads. This avoids damage such as loosening or detachment of the valve body 2 due to vibration, allowing it to better adapt to vibration environments and extend the service life of the check valve 10. The valve cavity 23 has a pressure relief port 24 and a mounting port 25 at opposite ends. The valve core 3 and the elastic element are both inserted into the valve body 2 through the mounting port 25. The pressure relief port 24, valve cavity 23, and mounting port 25 are sequentially connected, forming a pressure relief channel within the valve body 2.

[0073] Furthermore, the inner diameter of the mounting port 25 is smaller than the inner diameter of the valve cavity 23, forming a stop step 26. The elastic element is a conical spring 4. The small end of the conical spring 4 elastically abuts against the valve core 3, and the large end of the conical spring 4 elastically abuts against the stop step 26. That is, the diameter of the large end of the conical spring 4 is larger than the inner diameter of the mounting port 25. The conical spring 4 with a larger diameter can be screwed into the smaller mounting port 25, thus easily achieving the installation and fixation of the conical spring 4. After the conical spring 4 is installed in place, the conical spring 4 is completely contained within the valve cavity 23, and the large end of the conical spring 4 is located outside the area of ​​the mounting port 25. Therefore, the conical spring 4 also serves to close the mounting port 25, ensuring that the valve core 3 and other components inside the valve cavity 23 will not fall out.

[0074] Furthermore, a portion of the valve core 3 passes through the pressure relief port 24 and protrudes outside the valve body 2. During the lifting and lowering process of the valve core 3, it can push out food residue remaining in the pressure relief port 24, thereby automatically cleaning the pressure relief port 24 and effectively reducing the risk of blockage in the pressure relief port 24.

[0075] Furthermore, the lower end of the valve body 2 is provided with at least one anti-clogging groove 27, which is recessed into the lower surface of the valve body 2. The anti-clogging groove 27 connects to the pressure relief port 24 and extends radially along the valve body 2 to penetrate the outer periphery of the valve body 2, thereby increasing the air intake area and thus increasing the air flow, allowing the high-pressure gas inside the boiler to be discharged quickly. When there are two or more anti-clogging grooves 27, each anti-clogging groove 27 is evenly distributed around the axis of the valve body 2 to improve the stability of the valve body 2.

[0076] Furthermore, the width of the anti-clogging groove 27 is smaller than the inner diameter of the pressure relief port 24 to block large food particles, preventing them from clogging the pressure relief port 24 and ensuring the smooth flow of the pressure relief channel. Specifically, when large food particles approach the lower end of the valve body 2, they close and stop at the opening of the anti-clogging groove 27. On the one hand, the large food particles cannot further enter the pressure relief port 24, thus preventing them from clogging it. On the other hand, the high-pressure gas inside the pot can still enter the pressure relief port 24 radially along the anti-clogging groove 27 for discharge, thus ensuring the smooth flow of the pressure relief channel.

[0077] In addition, this application embodiment also provides a pressure cooker, which includes a pot body and any of the pressure cooker lids provided in this application embodiment, wherein the pressure cooker lid is fitted onto the pot body.

[0078] 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 check valve, characterized in that, include: The elastic valve seat (1) is provided with an exhaust hole (11), and the lower end of the elastic valve seat (1) is provided with an annular sealing rib (12), which surrounds the exhaust hole (11). The valve body (2) is inserted through the exhaust hole (11). The outer periphery of the valve body (2) is provided with an annular sealing flange (21). The sealing flange (21) is located below the elastic valve seat (1). The valve body (2) slides along the axial direction of the exhaust hole (11) so that the sealing flange (21) and the sealing rib (12) are either in contact with each other or separated from each other.

2. The check valve according to claim 1, characterized in that, The vent (11) includes a first hole section (111) that penetrates the lower end of the resilient valve seat (1); Along the bottom-up direction, the aperture of the first aperture segment (111) gradually increases.

3. The check valve according to claim 2, characterized in that, The sealing rib (12) is disposed at the edge of the first hole section (111).

4. The check valve according to claim 2, characterized in that, The exhaust port (11) includes a second section (112) located above the first section (111). The second section (112) penetrates the upper end of the elastic valve seat (1), and the diameter of the second section (112) remains unchanged.

5. The check valve according to claim 4, characterized in that, The outer diameter of the sealing rib (12) is larger than the diameter of the second hole section (112).

6. The check valve according to claim 4, characterized in that, The axial dimension of the second hole segment (112) is greater than the axial dimension of the first hole segment (111).

7. The check valve according to any one of claims 1-6, characterized in that, The exhaust hole (11) has a plurality of protruding posts (113) protruding from its wall. The protruding posts (113) extend along the axial direction of the exhaust hole (11) and are arranged at intervals along the circumference of the exhaust hole (11). The protruding posts (113) are in contact with the outer wall of the valve body (2).

8. The check valve according to any one of claims 1-6, characterized in that, The lower end of the resilient valve seat (1) includes a spare sealing surface (13), which surrounds the outside of the sealing rib (12), and a portion of the sealing flange (21) is located directly below the spare sealing surface (13).

9. The check valve according to any one of claims 1-6, characterized in that, The valve body (2) has a limiting flange (22) protruding from its outer periphery. The limiting flange (22) is located above the elastic valve seat (1). At least a portion of the limiting flange (22) extends beyond the edge of the exhaust port (11). The limiting flange (22) is provided with at least one exhaust notch (221), and at least a portion of the exhaust notch (221) is located within the edge of the exhaust hole (11).

10. The check valve according to any one of claims 1-6, characterized in that, The valve body (2) is an integral structure, and the valve body (2) has a valve cavity (23) inside. The valve cavity (23) has a pressure relief port (24) and a mounting port (25) at opposite ends. The inner diameter of the mounting port (25) is smaller than the inner diameter of the valve cavity (23) to form a stop step (26). The valve cavity (23) is equipped with: The valve core (3) is slidably connected to the valve cavity (23) to open or close the pressure relief port (24); A conical spring (4) is disposed at one end of the valve cavity (23) away from the pressure relief port (24). The small end of the conical spring (4) elastically abuts against the valve core (3), and the large end of the conical spring (4) elastically abuts against the stop step (26).

11. The check valve according to claim 10, characterized in that, The lower end of the valve body (2) is provided with at least one anti-blocking groove (27), the anti-blocking groove (27) is connected to the pressure relief port (24) and extends radially along the valve body (2) to penetrate the outer periphery of the valve body (2), and the groove width of the anti-blocking groove (27) is smaller than the inner diameter of the pressure relief port (24).

12. A pressure cooker lid, characterized in that, The device includes a cover and a check valve as described in any one of claims 1-11, wherein the cover has a through hole and the resilient valve seat is sealed to the through hole.

13. A pressure cooker, characterized in that, It includes a pot body and a pressure cooker lid as described in claim 12, the pressure cooker lid being fitted onto the pot body.

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