Opening stopping valve, pressure cooker cover and pressure cooker

Abstract

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

[0002] A pressure cooker is a common cooking appliance. Its main function is to increase the heating temperature by increasing the air pressure in the pot, thereby increasing the heating speed. The pressure cooker is mainly composed of a pressure cooker lid and a pot body. The pressure cooker lid and the pot body are connected by pot teeth. The pressure cooker lid is usually provided with a check valve. When the check valve rises to form a sealed state, the pressure in the pot can be increased. In the prior art, a sealing ring is usually arranged outside the valve body of the check valve. During use, the sealing ring may be improperly installed or twisted and deformed, resulting in leakage of the check valve, which affects the user experience of the pressure cooker. Summary of the invention

[0003] The present application provides a stop valve, a pressure cooker cover and a pressure cooker, so as to improve the sealing performance of the stop valve and improve the user experience of the pressure cooker.

[0004] A first aspect of the present application provides a non-opening valve, comprising:

[0005] An elastic valve seat, wherein the elastic valve seat is provided with an exhaust hole, and an annular sealing convex rib is convexly provided at the lower end of the elastic valve seat, and the sealing convex rib surrounds the exhaust hole;

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

[0007] The valve body slides along the axial direction of the exhaust hole so that the sealing flange and the sealing rib are fitted to each other or separated from each other.

[0008] The stop valve provided in the present application includes an elastic valve seat and a valve body, 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, and the sealing rib surrounds the exhaust hole; the valve body is passed through the exhaust hole, and the outer periphery of the valve body is provided with an annular sealing flange, and the sealing flange is located below the elastic valve seat; the valve body slides axially along the exhaust hole to make the valve body slide axially along the exhaust hole to make the sealing flange and the sealing rib fit together or separate from each other, thereby closing or opening the exhaust hole, that is, the sealing flange and the sealing rib cooperate with each other to make the stop valve sealed, thereby improving the sealing performance of the stop valve. On the one hand, the sealing rib has a small cross-section and low strength, so only a small clamping force is required to achieve elastic fitting between the sealing flange and the sealing rib, making it easy to form an elastic seal between the sealing flange and the sealing rib; on the other hand, the elastic valve seat has a high strength, and the elastic valve seat plays a reliable positioning and reinforcement role for the sealing rib, which can prevent the sealing rib from shifting or twisting and other abnormalities, ensuring that the sealing rib maintains the expected position and shape, so that the sealing flange can fit the sealing rib more accurately, ensuring a reliable sealing effect.

[0009] Optionally, the exhaust hole includes a first hole section, the first hole section runs through the lower end of the elastic valve seat; along the bottom-to-top direction, the aperture of the first hole section gradually increases. On the one hand, at the bottom of the elastic valve seat, the exhaust gap is small, which can prevent the steam in the pot from being lost, so that the pressure cooker can complete the pressure increase at a relatively small heating power, reducing energy loss; on the other hand, within the height range of the first hole section, the exhaust gap gradually increases, so that the gas in the exhaust gap can be quickly discharged, preventing a large pressure from being formed in the pot when the lid is opened and closed, which affects the safety of the pressure cooker.

[0010] Optionally, the sealing rib is arranged at the edge of the first hole segment, which can reduce the deformation resistance of the sealing rib and increase the flexibility of the sealing rib, thereby improving the sealing effect of the check valve, and can also strengthen the first hole segment, thereby preventing the edge of the first hole segment from being damaged such as cracks, thereby extending the service life of the check valve.

[0011] Optionally, the exhaust hole includes a second hole segment, the second hole segment is located above the first hole segment, the second hole segment passes through the upper end of the elastic valve seat, and the aperture of the second hole segment remains unchanged. On the one hand, by providing the second hole segment, the axial dimension of the elastic valve seat can be increased, which can increase the structural strength of the elastic valve seat itself and increase the matching depth between the valve body and the elastic valve seat, thereby increasing the stability and reliability of the check valve; on the other hand, the aperture of the second hole segment remains unchanged, which can guide the steam so that the steam is ejected in the vertical direction to prevent the steam from diffusing and scalding the user.

[0012] Optionally, the outer diameter of the sealing rib is larger than the aperture of the second hole section. At least a portion of the sealing rib is located outside the suspended structure, thereby ensuring that the elastic valve seat can reliably position and strengthen the sealing rib, preventing the sealing rib from turning over with the suspended structure and other accidents, thereby affecting the normal cooperation between the sealing flange and the sealing rib.

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

[0014] Optionally, the hole wall of the exhaust hole is provided with a plurality of protrusions, the protrusions extend along the axial direction of the exhaust hole, the protrusions are arranged at intervals along the circumferential direction of the exhaust hole, and the protrusions contact the outer wall of the valve body. This can provide a reliable radial positioning effect for the valve body to prevent the valve body from shaking or moving in the exhaust hole, thereby ensuring a reliable sealing effect, and can also reduce the contact area between the valve body and the exhaust hole, thereby reducing the movement resistance of the valve body to rise and fall, and also reducing the steam pressure required for the valve body to rise, thereby shortening the pressure rise time of the pressure cooker and improving the cooking efficiency of the pressure cooker.

[0015] Optionally, the lower end of the elastic valve seat includes a spare sealing surface, the spare sealing surface surrounds the outer side 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, the valve body can rise further to make the sealing flange and the spare sealing surface fit each other, that is, when the sealing rib fails, the valve body can still close the exhaust hole to achieve high-pressure cooking, thereby extending the service life of the check valve.

[0016] Optionally, a limiting flange is convexly provided on the outer periphery of the valve body, 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 exhaust hole; the limiting flange is provided with at least one exhaust notch, and at least a portion of the exhaust notch is located within the edge of the exhaust hole. When the valve body descends, the limiting flange overlaps the elastic valve seat, so that the elastic valve seat provides support and limiting to the valve body, preventing the valve body from falling from the elastic valve seat. At this time, the exhaust notch is connected to the exhaust port, thereby preventing the limiting flange from closing the exhaust port in the pressure relief state, resulting in negative pressure in the pressure cooker, and affecting the normal opening of the pressure cooker lid.

[0017] Optionally, the valve body is an integrated structure, a valve cavity is provided inside the valve body, a pressure relief port and an installation port are respectively provided at two opposite ends of the valve cavity, an inner diameter of the installation port is smaller than an inner diameter of the valve cavity to form a stop step, and the valve cavity is installed with: 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 arranged at one 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 does not have any detachable connection structure or components such as threads, which can prevent the valve body from being damaged such as loosening or falling off due to vibration, so that the valve body can better adapt to the vibration environment and extend the service life of the check valve; the conical spring with a larger diameter at the large end can be screwed into a smaller installation port, so that the conical spring can be easily installed and fixed; when the conical spring is installed in place, the conical spring is completely accommodated 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 plays a role in closing the installation port to ensure that the valve core and other components in the valve cavity will not fall off.

[0018] Optionally, at least one anti-blocking groove is provided at the lower end of the valve body, the anti-blocking groove is connected to the pressure relief port, and extends along the radial direction of the valve body to the outer circumference of the valve body, and the groove width of the anti-blocking groove is smaller than the inner diameter of the pressure relief port. The anti-blocking groove can increase the air intake area, thereby increasing the ventilation volume, so that the high-pressure gas in the pot can be discharged quickly, and the anti-blocking groove has a blocking effect on large particles of food residues, preventing large particles of food residues from blocking the pressure relief port, and ensuring the smoothness of the pressure relief channel.

[0019] The second aspect of the present application provides a pressure cooker cover, which includes a cover body and any one of the non-opening valves provided by the present application, wherein the cover body is provided with a through hole, and the elastic valve seat is sealingly connected to the through hole. On the one hand, the cross section of the sealing rib is small and the strength is low, so only a small pressing force is required to achieve the elastic fit between the sealing flange and the sealing rib, so that it is easy to form an elastic seal between the sealing flange and the sealing rib; on the other hand, the elastic valve seat has a high strength, and the elastic valve seat plays a reliable positioning and strengthening role for the sealing rib, which can prevent the sealing rib from shifting or twisting and other abnormalities, and ensure that the sealing rib maintains the expected position and shape, so that the sealing flange can fit the sealing rib more accurately, ensuring a reliable sealing effect.

[0020] The third aspect of the present application provides a pressure cooker, which includes a pot body and any one of the pressure cooker lids provided in the present application, and the pressure cooker lid is fitted on the pot body. On the one hand, the cross section of the sealing rib is small and the strength is low, so only a small pressing force is required to achieve the elastic fit between the sealing flange and the sealing rib, so that it is easy to form an elastic seal between the sealing flange and the sealing rib; on the other hand, the elastic valve seat has a high strength, and the elastic valve seat plays a reliable positioning and strengthening role for the sealing rib, which can prevent the sealing rib from shifting or twisting and other abnormalities, and ensure that the sealing rib maintains the expected position and shape, so that the sealing flange can fit the sealing rib more accurately, ensuring a reliable sealing effect.

[0021] It should be understood that the foregoing general description and the following detailed description are exemplary only and are not restrictive of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

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

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

[0024] Figure 3 A schematic diagram of the three-dimensional structure of a check valve provided in an embodiment of the present application;

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

[0026] Figure 5 A schematic diagram of the structure of the elastic valve seat provided in the embodiment of the present application;

[0027] Figure 6 A cross-sectional view of a stop valve along a protruding column provided in an embodiment of the present application;

[0028] Figure 7 A cross-sectional view of the non-opening valve along the exhaust gap provided in an embodiment of the present application.

[0029] Reference numerals:

[0030] 10-stop valve;

[0031] 20-cover body;

[0032] 30-display rod;

[0033] 40-Safety parts;

[0034] 1- Elastic valve seat;

[0035] 11- Exhaust hole;

[0036] 111-first hole section;

[0037] 112 - second hole section;

[0038] 113-convex column;

[0039] 12- sealing rib;

[0040] 13-spare sealing surface;

[0041] 2-valve body;

[0042] 21- sealing flange;

[0043] 22-limiting flange;

[0044] 221- Exhaust notch;

[0045] 23-valve chamber;

[0046] 24-pressure relief port;

[0047] 25-installation port;

[0048] 26- stop step;

[0049] 27- Anti-blocking slot;

[0050] 3-valve core;

[0051] 4-Conical spring.

[0052] 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

[0053] In order to make the purpose, technical solution and advantages of the present application more clearly understood, the present application is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

[0054] In the description of this application, unless otherwise clearly specified and limited, the terms "first" and "second" are used for descriptive purposes only and cannot 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 be a fixed connection, a detachable connection, an integral connection, or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0055] 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 at the angles 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 also be understood that when it is mentioned that an element is connected to another element "upper" or "lower", it can not only be directly connected to another element "upper" or "lower", but also indirectly connected to another element "upper" or "lower" through an intermediate element.

[0056] like Figure 1 and Figure 2 As shown, the embodiment of the present application provides a pressure cooker lid, which can be covered on the pot body and together with the pot body form a pressure cooker. The pressure cooker lid includes a lid body 20 and a check valve 10. The lid body 20 is provided with 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 in the pot can be increased, thereby achieving the high-pressure cooking requirements; when the check valve 10 is in the pressure relief state, the pressure in the pot can be released, thereby ensuring the safety of opening and closing the lid.

[0057] Among them, a display rod 30 can be stacked above the stop valve 10, and a part of the display rod 30 is exposed above the cover 20, so that the user can understand the current state of the stop valve 10; when the display rod 30 is raised, the stop valve 10 is in a sealed state; when the display rod 30 is lowered, the stop valve 10 is in a pressure relief state. The pressure cooker cover can also include a safety member 40, which is slidably connected to the cover 20 and can slide along the radial direction of the cover 20 to lock or release the stop valve 10; when the safety member 40 locks the stop valve 10, the stop valve 10 cannot be freely raised or lowered, thereby maintaining in a pressure relief state to prevent accidental generation of high pressure in the pot and affect the safety of the pressure cooker; when the safety member 40 releases the stop valve 10, the stop valve 10 can be freely raised or lowered, thereby forming a sealed state and achieving high-pressure cooking requirements.

[0058] like Figure 2-Figure 7 As shown, the stop valve 10 provided in the embodiment of the present application includes an elastic valve seat 1 and a valve body 2. The elastic valve seat 1 can be made of a flexible material such as silicone, and the elastic valve seat 1 is sealed and connected to the through hole, so as to realize the installation and fixation of the stop valve 10 on the cover body 20, and the elastic valve seat 1 is provided with an exhaust hole 11. The valve body 2 can be made of a metal or alloy material such as aluminum, and the valve body 2 is penetrated through the exhaust hole 11, and can slide along the axial direction of the exhaust hole 11 to open or close the exhaust hole 11. When the valve body 2 closes the exhaust hole 11, the stop valve 10 forms a sealed state, and the pressure in the pressure cooker can be increased, thereby realizing the high-pressure cooking requirements; when the valve body 2 opens the exhaust hole 11, the stop valve 10 forms a pressure relief state, and the pressure in the pressure cooker can be released, thereby ensuring the safety of opening and closing the cover.

[0059] Furthermore, an annular sealing rib 12 is convexly provided at the lower end of the elastic valve seat 1, and the sealing rib 12 is integrally formed with the elastic valve seat 1, and the sealing rib 12 surrounds the exhaust hole 11. An annular sealing flange 21 is convexly provided on the outer periphery of the valve body 2, and 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 attached to or separated from each other, thereby closing or opening the exhaust hole 11, that is, the sealing flange 21 and the sealing rib 12 cooperate with each other to achieve sealing of the check valve 10. On the one hand, the sealing rib 12 has a small cross-section and low strength, so only a small pressing force is required to achieve elastic fit between the sealing flange 21 and the sealing rib 12, thereby 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 a high strength, and the elastic valve seat 1 plays a reliable positioning and reinforcement role for the sealing rib 12, which can prevent the sealing rib 12 from shifting or twisting and other abnormalities, ensuring that the sealing rib 12 maintains the expected position and shape, so that the sealing flange 21 can fit the sealing rib 12 more accurately, 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 part of the sealing flange 21 is located directly below the sealing rib 12. The sealing flange 21 and the sealing rib 12 are mutually fitted or separated 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, so that the sealing flange 21 and the sealing rib 12 are mutually fitted. At this time, the valve body 2 forms a sealing fit with the end of the elastic valve seat 1, thereby closing the exhaust hole 11, and the pressure in the pot can be further increased to achieve high-pressure cooking; when the pressure in the pot is reduced, the valve body 2 falls due to its own gravity, so that the sealing flange 21 and the sealing rib 12 are separated from each other. At this time, a gap is formed between the valve body 2 and the end of the elastic valve seat 1, thereby opening the exhaust hole 11, so that the pressure in the pot can be further released, ensuring the safety of opening and closing the lid.

[0061] In one embodiment, the cross section of the sealing rib 12 is semicircular. When the valve body 2 rises to make the sealing flange 21 and the sealing rib 12 contact each other, a linear seal can be quickly formed between the sealing flange 21 and the sealing rib 12, thereby shortening the pressure rise time of the pressure cooker and improving the cooking effect of the pressure cooker; as the pressure in the pressure cooker increases, the valve body 2 rises further, so that the sealing flange 21 squeezes the sealing rib 12, and the sealing flange 21 produces a large elastic deformation, so that a surface seal is formed between the sealing flange 21 and the sealing rib 12, ensuring a reliable sealing effect. It can be understood that in other embodiments, the cross section of the sealing rib 12 can be set to any appropriate shape such as a triangle, a trapezoid or a rectangle.

[0062] Furthermore, the lower end of the elastic valve seat 1 includes a sealing standby surface 13, which surrounds the outer side of the sealing rib 12, and a part of the sealing flange 21 is located directly below the sealing standby surface 13. The sealing rib 12 is a convex structure relative to the sealing standby surface 13. When the sealing rib 12 fails due to wear, the valve body 2 can rise further to make the sealing flange 21 fit the sealing standby surface 13. That is, when the sealing rib 12 fails, the valve body 2 can still close the exhaust hole 11 to achieve high-pressure cooking, thereby extending the service life of the check valve 10.

[0063] Furthermore, a limiting flange 22 is convexly provided on the outer periphery of the valve body 2, and at least a part of the limiting flange 22 extends beyond the edge of the exhaust hole 11; when the valve body 2 descends, the limiting flange 22 overlaps the top of the elastic valve seat 1, so that the elastic valve seat 1 provides support and limiting for the valve body 2, preventing the valve body 2 from falling from the elastic valve seat 1. The limiting flange 22 is provided with at least one exhaust notch 221, and at least a part of the exhaust notch 221 is located within the edge of the exhaust hole 11; when the limiting flange 22 overlaps the top of the elastic valve seat 1, the exhaust notch 221 is connected to the exhaust port, thereby preventing the limiting flange 22 from closing the exhaust port in the pressure relief state, resulting in negative pressure in the pressure cooker, and affecting the normal opening of the pressure cooker lid.

[0064] like Figure 5-Figure 7 As shown, further, a plurality of protrusions 113 are convexly provided on the hole wall of the exhaust hole 11. The protrusions 113 extend along the axial direction of the exhaust hole 11, and the protrusions 113 are arranged at intervals along the circumferential direction of the exhaust hole 11. The protrusions 113 are in contact with the outer wall of the valve body 2, and an exhaust gap is formed between adjacent protrusions 113. It can provide a reliable radial positioning effect for the valve body 2 to prevent the valve body 2 from shaking or moving in the exhaust hole 11, thereby ensuring a reliable sealing effect, and can reduce the contact area between the valve body 2 and the exhaust hole 11, thereby reducing the movement resistance of the valve body 2 to rise and fall, and also reducing the steam pressure required for the valve body 2 to rise, thereby shortening the pressure rise time of the pressure cooker and improving the cooking efficiency of the pressure cooker.

[0065] Furthermore, one side of the protrusion 113 facing the axis of the exhaust hole 11 is an outwardly convex arc surface, so that the protrusion 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 hole 11 and minimizing the movement resistance of the valve body 2 when it is lifted or lowered.

[0066] Furthermore, the exhaust hole 11 includes a first hole section 111, and the first hole section 111 penetrates the lower end of the elastic valve seat 1. Along the bottom-up direction, the aperture of the first hole section 111 gradually increases, that is, along the bottom-up direction, the exhaust gap between the valve body 2 and the first hole section 111 gradually increases. On the one hand, at the bottom of the elastic valve seat 1, the exhaust gap is small, which can prevent the steam in the pot from being lost, so that the pressure cooker can complete the pressure increase at a relatively small heating power and reduce energy loss; on the other hand, within the height range of the first hole section 111, the exhaust gap gradually increases, so that the gas in the exhaust gap can be quickly discharged, preventing a large pressure from being formed in the pot when the lid is opened and closed, which affects the safety of the pressure cooker.

[0067] Furthermore, the exhaust hole 11 includes a second hole section 112, which is located above the first hole section 111 and penetrates the upper end of the elastic valve seat 1. The aperture of the second hole section 112 remains unchanged, that is, along the bottom-up direction, the exhaust gap between the valve body 2 and the second hole section 112 remains unchanged. On the one hand, by setting the second hole section 112, the axial dimension of the elastic valve seat 1 can be increased, which can increase the structural strength of the elastic valve seat 1 itself and increase the matching depth between the valve body 2 and the elastic valve seat 1, thereby increasing the stability and reliability of the check valve 10; on the other hand, the aperture of the second hole section 112 remains unchanged, which can guide the steam so that the steam is ejected in the vertical direction to prevent the steam from diffusing and scalding the user.

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

[0069] Furthermore, the sealing rib 12 is arranged 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 can reduce the deformation resistance of the sealing rib 12, increase the flexibility of the sealing rib 12, thereby improving the sealing effect of the check valve 10, and strengthen the first hole section 111, thereby preventing the edge of the first hole section 111 from being damaged such as cracks, and extending the service life of the check valve 10. Specifically, along the top-down direction, the elastic valve seat 1 gradually extends inward in the first hole section 111 to form a suspended structure, and the sealing rib 12 is arranged 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 closer the elastic valve seat 1 is to the first hole section 111, the thinner the edge thickness is. By arranging 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 being damaged such as cracks.

[0070] Furthermore, the outer diameter of the sealing rib 12 is larger than the aperture of the second hole section 112, that is, 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 elastic valve seat 1 plays a reliable positioning and reinforcement role for the sealing rib 12, preventing the sealing rib 12 from turning over with the suspended structure and other accidents, which affects the normal cooperation between the sealing flange 21 and the sealing rib 12.

[0071] like Figure 6 and Figure 7 As shown, further, a valve cavity 23 is provided inside the valve body 2, and a pressure relief hole is provided at one end of the valve cavity 23, and a valve core 3 and an elastic member (for example, a spring, etc.) are installed in the valve cavity 23. The valve core 3 is slidably connected to the valve cavity 23 to open or close the pressure relief hole 24; the elastic member elastically abuts against the end of the valve core 3 away from the pressure relief hole 24 to force the valve core 3 to slide in the direction close to the pressure relief hole. In other words, when the pressure cooker is used normally, the valve core 3 is in a state of closing the pressure relief hole, so that the pressure cooker can normally achieve high-pressure cooking; when an abnormality such as the exhaust hole 11 is blocked, resulting in excessive pressure in the pressure cooker (for example, when the exhaust hole 11 is blocked), the high-pressure gas pushes the valve core 3 to slide in the direction away from the pressure relief hole, so that the pressure relief hole 24 is opened, and the pressure in the pot is released through the pressure relief hole 24, so that the safety of the pressure cooker can be guaranteed.

[0072] Furthermore, the valve body 2 is an integrated structure, that is, the valve body 2 does not have detachable connection structures or components such as threads, which can prevent the valve body 2 from being damaged such as loosening or falling off due to vibration, so that the valve body 2 can better adapt to the vibration environment and extend the service life of the check valve 10. The opposite ends of the valve cavity 23 are respectively provided with a pressure relief port 24 and an installation port 25, and the valve core 3 and the elastic member are both installed in the valve body 2 through the installation port 25. The pressure relief port 24, the valve cavity 23 and the installation port 25 are sequentially connected to form a pressure relief channel in the valve body 2.

[0073] Furthermore, the inner diameter of the installation opening 25 is smaller than the inner diameter of the valve cavity 23 to form a stop step 26, and the elastic member 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 large end diameter of the conical spring 4 is larger than the inner diameter of the installation opening 25. The conical spring 4 with a larger large end diameter can be screwed into the smaller installation opening 25, so that the installation and fixation of the conical spring 4 can be easily achieved; when the conical spring 4 is installed in place, the conical spring 4 is completely accommodated in the valve cavity 23, and the large end of the conical spring 4 is located outside the area of ​​the installation opening 25, so the conical spring 4 also plays a role in closing the installation opening 25, ensuring that the valve core 3 and other components in the valve cavity 23 will not fall off.

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

[0075] Furthermore, at least one anti-blocking groove 27 is provided at the lower end of the valve body 2, and the anti-blocking groove 27 is recessed in the lower surface of the valve body 2. The anti-blocking groove 27 is connected to the pressure relief port 24, and extends along the radial direction of the valve body 2 to the outer periphery of the valve body 2 to increase the air intake area, thereby increasing the ventilation volume, so that the high-pressure gas in the pot can be discharged quickly. When the number of the anti-blocking grooves 27 is two or more, each anti-blocking 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-blocking groove 27 is smaller than the inner diameter of the pressure relief port 24, so as to block the large particles of food residue, prevent the large particles of food residue from blocking the pressure relief port 24, and ensure the smoothness of the pressure relief channel. Specifically, when the large particles of food residue approach the lower end of the valve body 2, the large particles of food residue are closed and stopped at the groove of the anti-blocking groove 27; on the one hand, the large particles of food residue cannot further enter the pressure relief port 24 upward, so the large particles of food residue can be prevented from blocking the pressure relief port 24; on the other hand, the high-pressure gas in the pot can still enter the pressure relief port 24 along the radial direction of the anti-blocking groove 27 for discharge, so the smoothness of the pressure relief channel can be ensured.

[0077] 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 covers provided in the embodiments of the present application, wherein the pressure cooker cover is covered on the pot body.

[0078] The above description is only the preferred embodiment of the present application and is not intended to limit the present application. For those skilled in the art, the present application may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A check valve, characterized in that: include: An elastic valve seat (1), wherein the elastic valve seat (1) is provided with an exhaust hole (11), and an annular sealing convex rib (12) is convexly provided at the lower end of the elastic valve seat (1), and the sealing convex rib (12) surrounds the exhaust hole (11); A valve body (2) is provided through the exhaust hole (11), and an annular sealing flange (21) is provided on the outer periphery of the valve body (2), and 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 in contact with each other or separated from each other.

2. The check valve according to claim 1, characterized in that: The exhaust hole (11) comprises a first hole section (111), and the first hole section (111) passes through the lower end of the elastic valve seat (1); Along the direction from bottom to top, the aperture of the first hole section (111) gradually increases.

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

4. The check valve according to claim 2, characterized in that: The exhaust hole (11) comprises a second hole section (112), the second hole section (112) is located above the first hole section (111), the second hole section (112) passes through the upper end of the elastic valve seat (1), and the aperture of the second hole 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 hole 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 section (112) is greater than the axial dimension of the first hole section (111).

7. The check valve according to any one of claims 1 to 6, characterized in that: A plurality of protruding columns (113) are provided on the hole wall of the exhaust hole (11), the protruding columns (113) extend along the axial direction of the exhaust hole (11), the protruding columns (113) are arranged at intervals along the circumference of the exhaust hole (11), and the protruding columns (113) are in contact with the outer wall of the valve body (2).

8. The check valve according to any one of claims 1 to 6, characterized in that: The lower end of the elastic valve seat (1) comprises a spare sealing surface (13), the spare sealing surface (13) surrounds the outer side of the sealing rib (12), and a part 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 to 6, characterized in that: A limiting flange (22) is convexly provided on the outer periphery of the valve body (2), the limiting flange (22) is located above the elastic valve seat (1), and at least a portion of the limiting flange (22) extends beyond the edge of the exhaust hole (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 to 6, characterized in that: The valve body (2) is an integrated structure, a valve cavity (23) is provided inside the valve body (2), a pressure relief port (24) and a mounting port (25) are provided at opposite ends of the valve cavity (23), 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), and the valve cavity (23) is installed with: A 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 arranged 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: At least one anti-blocking groove (27) is provided at the lower end of the valve body (2), the anti-blocking groove (27) is connected to the pressure relief port (24), and extends along the radial direction of the valve body (2) to penetrate the outer circumference 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 cover, characterized in that: It comprises a cover body and the non-opening valve according to any one of claims 1 to 11, wherein the cover body is provided with a through hole, and the elastic valve seat is sealingly connected to the through hole.

13. A pressure cooker, characterized in that: The pressure cooker comprises a pot body and the pressure cooker cover according to claim 12, wherein the pressure cooker cover is fitted on the pot body.

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