Opening stop valve assembly, pressure cooker cover and pressure cooker

Abstract

The utility model provides an opening stopping valve assembly, a pressure cooker cover and a pressure cooker. The ball head is connected to one end of the valve body; and the sealing piece is provided with a spherical groove, and the spherical groove is matched with the ball head, so that the sealing piece can deflect relative to the valve body while moving along with the valve body. According to the opening stop valve assembly, the sealing piece can be prevented from inclining or shaking along with the valve body, the expected sealing state can be achieved between the sealing piece and the cover body, and the sealing effect of the opening stop valve assembly is ensured.

Description

Technical Field

[0001] The present application relates to the technical field of kitchen appliances, and in particular to a safety 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 is usually equipped with a check valve to prevent the user from opening the lid when high pressure is generated in the pot. That is to say, when the pressure in the pot is high, the check valve rises to form a sealed state, and the user cannot open the lid at this time; when the pressure in the pot is low, the check valve drops to form a pressure relief state, and the user can open the lid smoothly at this time. Since the check valve is prone to shaking or tilting during the rising process, it is difficult for the check valve to achieve the expected sealing state, affecting the sealing effect of the check valve. Utility Model Content

[0003] The present application provides a stop valve assembly, a pressure cooker lid and a pressure cooker to prevent a seal from tilting or shaking along with a valve body, so that an expected sealing state can be achieved between the seal and the lid body, thereby ensuring the sealing effect of the stop valve assembly.

[0004] A first aspect of the present application provides a check valve assembly, comprising:

[0005] Valve body;

[0006] A ball head connected to one end of the valve body;

[0007] A sealing member is provided with a spherical groove, wherein the spherical groove cooperates with the ball head so that the sealing member can deflect relative to the valve body while moving with the valve body.

[0008] The stop valve assembly provided by the present application includes a valve body, a ball head and a sealing member. The valve body can be inserted into the mounting hole of the cover body and rise and fall along the mounting hole; the ball head is connected to one end of the valve body; the sealing member is provided with a spherical groove, and the spherical groove cooperates with the ball head so that the sealing member can deflect relative to the valve body while moving with the valve body, that is, a spherical pair is formed by the cooperation of the spherical groove and the ball head, so that a movable connection with high sensitivity and rotational freedom is formed between the sealing member and the ball head, which can not only form a reliable axial positioning between the sealing member and the valve body, so that the installation position of the sealing member in the valve body remains unchanged, and ensure that the sealing member can move upward with the valve body and press the cover body; and when the valve body tilts or shakes during the rising process, the sealing member can automatically deflect relative to the valve body, thereby preventing the sealing member from tilting or shaking with the valve body, so that the sealing member always maintains a sealing position, so that the sealing member and the cover body can achieve an expected sealing state during use, and ensure the sealing effect of the stop valve assembly.

[0009] Optionally, the seal is configured as a sleeve structure coaxial with the valve body, which can not only lower the center of gravity of the seal, increase the balance of the seal itself, and reduce the vibration of the seal caused by the impact of airflow and other forces, but also increase the fitting length of the seal and the valve body, thereby increasing the fitting area between the seal and the valve body and reducing the risk of the seal loosening or falling off.

[0010] Optionally, the valve body includes a limiting section, which extends above the ball head; one end of the seal along its own axial direction is a sealing end, and the sealing end is sleeved on the limiting section. On the one hand, the sealing end is overlapped with the top of the ball head, so that the sealing end covers and covers the top of the ball head as much as possible to avoid the ball head and the cover body surface from abutting against each other; on the other hand, the sealing end is sleeved on the outside of the valve body to limit the installation angle of the seal and the ball head, to prevent the seal and the valve body from being deflected too much relative to each other in the initial state, so that the seal cannot form the expected sealing state.

[0011] Optionally, an annular gap is provided between the sealing end and the limiting section, thereby forming an escape space between the seal and the valve body, preventing unnecessary constraints between the valve body and the seal, resulting in limited relative deflection of the seal and the valve body.

[0012] Optionally, the sealing end is provided with a sealing lip, which protrudes from the side of the sealing end away from the ball head along the axial direction of the valve body, so as to form a precise annular sealing area and reduce the overall processing accuracy requirement of the sealing end, and increase the elastic deformation of the sealing member, thereby ensuring that the sealing member can be fully compressed and deformed, thereby achieving reliable sealing between the sealing member and the cover body;

[0013] Along the direction away from the ball head, the sealing lip gradually inclines in the direction away from the axis of the seal. When the seal approaches the cover body as the valve body moves, the sealing lip is squeezed against the surface of the cover body and opens outward, which can increase the fitting area between the sealing lip and the surface of the cover body and increase the reliability of the sealing fit, and can also make the deformation of the sealing lip easier, thereby avoiding unnecessary deformation in the middle of the sealing end and other positions, which affects the reliability of the sealing fit.

[0014] Optionally, along the radial direction of the seal, at least a portion of the sealing lip is inclined beyond the edge of the sealing end, which can not only reduce the deformation resistance of the sealing lip and make the deformation of the sealing lip easier, but also form a lever structure with the middle of the sealing end as the fulcrum. The sealing lip forms a reaction force on the seal, so that the free end can hold the ball head tightly, thereby increasing the reliability of the connection between the ball head and the spherical groove.

[0015] Optionally, one end of the seal along its own axial direction is a free end, and the free end is an elastic annular structure. An opening connected to the spherical groove is formed in the center of the annular structure to facilitate installation and removal of the ball head.

[0016] Optionally, a valve cavity is provided inside the valve body, and a valve seat is provided inside the valve cavity; a groove is provided at one end of the ball head away from the valve body, and the groove is recessed inward from the surface of the ball head and connected to the valve seat. The groove forms the actual air inlet end of the pressure relief channel, and the high-pressure gas in the pot can act on the valve seat only after passing through the groove, so that the groove plays a role in filtering and blocking food residues, etc., preventing food residues from entering the valve seat along with the high-pressure gas, causing problems such as blockage or adhesion of the valve seat, and affecting the normal opening of the pressure relief channel.

[0017] Optionally, the stop valve assembly further comprises a stop member, which abuts against an end of the valve body away from the ball head, and increases the weight of the valve body moving downward without changing the valve body, thereby ensuring that the valve body can automatically descend to form a pressure relief state, so that the pot cover can be opened smoothly;

[0018] A buffer cavity is provided at one end of the stop opening member facing the valve body, and the buffer cavity is connected to the valve cavity. After the high-pressure gas in the pot passes through the valve cavity, it enters the buffer cavity for buffering to reduce exhaust noise; the gas in the buffer cavity pushes the stop opening member upward, thereby forming an annular exhaust gap between the buffer cavity and the valve body, and the gas in the buffer cavity is discharged from the exhaust gap, which changes the direction of gas movement and forms energy dissipation.

[0019] A second aspect of the present application provides a pressure cooker lid, which includes a lid body and any one of the stop valve assemblies provided in the present application, wherein the valve body is passed through the lid body and can float up and down along the lid body; the sealing member is located below the lid body, and the sealing member approaches or moves away from the lid body as the valve body moves.

[0020] A third aspect of the present application provides a pressure cooker, which comprises a pot body and any one of the pressure cooker lids provided in the present application.

[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 schematic diagram of the structure of a pressure cooker provided in an embodiment of the present application;

[0023] Figure 2 A schematic diagram of a portion of the structure of a pressure cooker lid in a pressure relief state provided in an embodiment of the present application;

[0024] Figure 3A schematic diagram of a portion of the structure of the pressure cooker lid in a sealed state provided in an embodiment of the present application;

[0025] Figure 4 A schematic diagram of the three-dimensional structure of a check valve assembly provided in an embodiment of the present application;

[0026] Figure 5 A schematic cross-sectional structure diagram of a stop valve assembly provided in an embodiment of the present application.

[0027] Reference numerals:

[0028] 01-Stop valve assembly;

[0029] 02-cover;

[0030] 03-pot body;

[0031] 1- Valve body;

[0032] 11-limiting section;

[0033] 12-Support steps;

[0034] 13- limiting flange;

[0035] 1a-valve chamber;

[0036] 1b-valve seat;

[0037] 1c-valve core;

[0038] 1d-spring;

[0039] 2-Ball head;

[0040] 21-groove;

[0041] 3- Seals;

[0042] 31-spherical groove;

[0043] 311-opening;

[0044] 32-sealed end;

[0045] 321 - sealing lip;

[0046] 322-cavity;

[0047] 323-limiting hole;

[0048] 33-free end;

[0049] 4-Stop opening piece;

[0050] 41- buffer chamber;

[0051] 5- Annular gap.

[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 As shown, an embodiment of the present application provides a pressure cooker, which includes a cooker body 03 and a pressure cooker cover. The pressure cooker cover is detachably connected to the cooker body 03, and a sealing fit can be formed between the pressure cooker cover and the cooker body 03.

[0057] like Figure 1-Figure 3 As shown, the pressure cooker lid provided in the embodiment of the present application includes a lid body 02 and a non-opening valve assembly 01. The lid body 02 is provided with a mounting hole, and at least a part of the non-opening valve assembly 01 is penetrated through the mounting hole. For example, the valve body 1 of the non-opening valve assembly 01 is penetrated through the mounting hole and can slide up and down along the mounting hole. The non-opening valve assembly 01 provided in the embodiment of the present application can meet the requirement that when the pressure in the pot is ≥5kPa, a force of 100N is applied and the lid cannot be opened, as well as the requirement of a lower pressure in the pot.

[0058] like Figure 2-Figure 5As shown, the stop valve assembly 01 provided in the embodiment of the present application includes a valve body 1 and a sealing member 3. The valve body 1 is configured as a columnar structure, which can be passed through the mounting hole of the cover body 02 and rise and fall along the mounting hole; the sealing member 3 is connected to the valve body 1, and the sealing member 3 is located below the cover body 02. The sealing member 3 approaches the cover body 02 or moves away from the cover body 02 as the valve body 1 moves, thereby forming a sealed state or a pressure relief state for the stop valve. When the sealing member 3 moves away from the cover body 02 as the valve body 1 moves away from the cover body 02, a pressure relief state is formed between the sealing member 3 and the cover body 02, that is, the stop valve descends to form a pressure relief state (see Figure 2 ); When the seal 3 moves closer to the cover 02 as the valve body 1 moves (see Figure 3 ), a sealing state is formed between the sealing member 3 and the cover body 02, that is, the non-opening valve rises to form a sealing state.

[0059] Furthermore, the check valve assembly 01 also includes a ball head 2, and a sealing member 3 is connected to the ball head 2, that is, the sealing member 3 is connected to the valve body 1 through the ball head 2. The ball head 2 is connected to one end of the valve body 1, and the ball head 2 and the valve body 1 can be connected to each other in a detachable manner such as threads, or can be connected to each other in a non-detachable manner such as welding or integral molding; the sealing member 3 is provided with a spherical groove 31, and the spherical groove 31 cooperates with the ball head 2 so that the sealing member 3 can deflect relative to the valve body 1 while the valve body moves, that is, a spherical pair is formed by the cooperation of the spherical groove 31 and the ball head 2, so that a movable connection with high sensitivity and rotational freedom is formed between the sealing member 3 and the ball head 2, which can make the sealing member and the valve body move smoothly. The body 1 forms a reliable axial positioning, so that the installation position of the seal 3 on the valve body 1 remains unchanged, ensuring that the seal 3 can move upward with the valve body 1 and press the cover body 02; and when the valve body 1 tilts or shakes during the rising process, the seal 3 can automatically deflect relative to the valve body 1, thereby preventing the seal 3 from tilting or shaking with the valve body 1, so that the seal 3 always maintains the sealing position, so that the seal 3 and the cover body 02 can achieve the expected sealing state during use, ensuring the sealing effect of the check valve assembly 01.

[0060] Specifically, the spherical groove 31 and the ball head 2 are fitted together through the spherical pair, so that the seal 3 is relatively stationary along the axial direction of the valve body 1, thereby forming reliable axial positioning; the spherical pair requires a small torque, which can improve the sensitivity of the seal 3 and ensure that the seal 3 can be deflected and adjusted relative to the valve body 1 when the valve body 1 is tilted or shaken; the spherical pair has a high degree of freedom of rotation, so that the seal 3 can be deflected and adjusted in any direction relative to the valve body 1.

[0061] Among them, at least a part of the seal 3 is made of elastic material, and the elastic material and the cover body 02 are squeezed and deformed, thereby forming a reliable sealing effect between the seal 3 and the cover body 02. In one embodiment, the seal 3 is an elastic member, that is, the seal 3 is integrally formed with an elastic material, which can increase the deformation capacity of the seal 3, thereby improving the sealing effect of the seal 3, and can also avoid the seal 3 from having too many connection structures, which affects the structural strength of the seal 3 itself and the reliability of the seal.

[0062] Furthermore, the seal 3 is configured as a sleeve structure coaxial with the valve body 1, that is, the seal 3 extends along the axial direction of the valve body 1, which can not only lower the center of gravity of the seal 3, increase the balance of the seal 3 itself, and reduce the vibration of the seal 3 caused by the impact of airflow and other forces, but also increase the fitting length of the seal 3 and the valve body 1, thereby increasing the fitting area of ​​the seal 3 and the valve body 1 and reducing the risk of the seal 3 loosening or falling off.

[0063] Specifically, the spherical groove 31 is arranged in the inner cavity of the sleeve, that is, at least a part of the inner cavity of the sleeve structure has a spherical surface, and the spherical surface surrounds the spherical groove 31 . The ball head 2 is inserted into the inner cavity of the sleeve and cooperates with the spherical groove 31 .

[0064] Furthermore, the surface of the spherical groove 31 is a spherical cap that is larger than a hemisphere, that is, the height of the spherical groove 31 is larger than the radius of the sphere, so that a portion of the spherical groove 31 surrounds the upper surface of the ball head 2, and the other portion surrounds the lower surface of the ball head 2, thereby forming a limit fit between the seal 3 and the upper and lower sides of the ball head 2 to prevent the seal 3 from moving or shifting along the axial direction of the valve body 1, which can prevent the seal 3 from falling off during use or cleaning, and can increase the reliability of the sealing fit.

[0065] Furthermore, the opening 311 of the spherical groove 31 faces downward, so that the seal 3 is inverted on the surface of the ball head 2, so that the ball head 2 and the top surface of the spherical groove 31 form a spherical contact with a larger area, and the supporting force is provided and transmitted by the spherical contact, so that the force on the seal 3 is more uniform, thereby forming a uniform and reliable sealing area between the seal 3 and the cover body 02.

[0066] Furthermore, one end of the seal 3 along its own axial direction is a sealing end 32. The sealing end 32 can be set as a closed panel structure or an annular structure. The sealing end 32 is used to elastically squeeze the surface of the cover 02, that is, an end face seal is formed between the seal 3 and the cover 02. As the pressure in the pot increases, the squeezing force between the seal 3 and the surface of the cover 02 will also increase accordingly, so that the sealing effect between the seal 3 and the cover 02 is gradually enhanced to prevent accidents such as leakage of the stop valve under high pressure.

[0067] Furthermore, the other end of the seal 3 along its own axial direction is a free end 33. The free end 33 is an elastic annular structure, and an opening 311 connected to the spherical groove 31 is formed in the center of the annular structure, that is, the opening 311 can be retracted to facilitate the installation and removal of the ball head 2. The inner surface of the opening 311 can be a spherical surface, that is, the spherical groove 31 directly penetrates the free end 33 to form the opening 311, and the end face of the spherical groove 31 is the end face of the free end 33, so as to reduce the constraint strength of the opening 311, increase the elasticity of the opening 311, and make the installation and removal of the ball head 2 more labor-saving. The inner surface of the opening 311 can be a non-spherical surface such as a cylindrical surface or a conical surface, that is, the end face of the spherical groove 31 extends in a direction away from the sealing end 32 to form the opening 311, so as to increase the structural strength of the opening 311 and prevent the opening 311 from being torn or damaged.

[0068] Furthermore, at least a portion of the sealing end 32 is higher than the top of the ball head 2 to avoid interference between the ball head 2 and the surface of the cover body 02, which may cause the seal 3 to be difficult to contact the surface of the cover body 02, or limit the extrusion stroke of the seal 3, thereby affecting the sealing of the check valve.

[0069] Furthermore, the valve body 1 includes a limiting section 11, which extends above the ball head 2; the sealing end 32 is sleeved on the limiting section 11, for example, the sealing end 32 is provided with a limiting hole 323, the limiting hole 323 extends along the axial direction of the sealing member 3, the limiting hole 323 is connected to the spherical groove 31, and the limiting section 11 is inserted into the limiting hole 323. On the one hand, the sealing end 32 is overlapped on the top of the ball head 2, so that the sealing end 32 covers and covers the top of the ball head 2 as much as possible to avoid the ball head 2 and the surface of the cover body 02 from abutting against each other; on the other hand, the sealing end 32 is sleeved on the outside of the valve body 1 to limit the installation angle of the sealing member 3 and the ball head 2, so as to prevent the sealing member 3 and the valve body 1 from being deflected too much relative to each other in the initial state, so that the sealing member 3 cannot form the expected sealing state.

[0070] Furthermore, the aperture of the limiting hole 323 is larger than the axial diameter of the limiting section 11, so that an annular gap 5 is formed between the sealing end 32 and the valve body 1, thereby forming an avoidance space between the seal 3 and the valve body 1, preventing unnecessary constraints between the valve body 1 and the seal 3, resulting in limited relative deflection of the seal 3 and the valve body 1.

[0071] Furthermore, a support step 12 is provided at one end of the limiting section 11 away from the ball head 2, and the sealing end 32 can elastically abut against the support step 12 to provide support and limit to the middle area of ​​the sealing end 32. This can prevent the middle part of the sealing member 3 from collapsing or other unnecessary deformations under the action of air pressure, thereby affecting the sealing performance of the sealing member 3, and can also prevent the sealing member 3 and the valve body 1 from sliding relative to each other in the axial direction, thereby causing hysteresis in the state switching of the sealing member 3 and affecting the sensitivity.

[0072] Furthermore, the sealing end 32 is provided with a sealing lip 321, which protrudes from the side of the sealing end 32 away from the ball head 2 along the axial direction of the valve body 1. It can not only form a precise annular sealing area and reduce the overall processing accuracy requirements of the sealing end 32, but also increase the elastic deformation of the seal 3 to ensure that the seal 3 can be fully compressed and deformed, thereby achieving reliable sealing between the seal 3 and the cover body 02.

[0073] Furthermore, along the direction away from the ball head 2, the sealing lip 321 gradually tilts in the direction away from the axis of the seal 3, that is, the sealing lip 321 is a flared structure. When the seal 3 approaches the cover body 02 with the movement of the valve body 1, the sealing lip 321 is squeezed with the surface of the cover body 02 and opens outward, which can increase the fitting area between the sealing lip 321 and the surface of the cover body 02 and increase the reliability of the sealing fit, and can also make the deformation of the sealing lip 321 easier, thereby avoiding unnecessary deformation of the middle part of the sealing end 32 and other positions, which affects the reliability of the sealing fit. In addition, a cavity 322 for accommodating gas is formed between the sealing lip 321 and the cover body 02, and the cavity 322 can be compressed or expanded with the deformation of the sealing lip 321, thereby playing a certain buffering role, making the movement of the seal 3 more stable, and reducing noise and vibration of the seal 3.

[0074] Furthermore, along the radial direction of the seal 3, at least a portion of the sealing lip 321 is inclined beyond the edge of the sealing end 32, which can not only reduce the deformation resistance of the sealing lip 321 and make the deformation of the sealing lip 321 easier, but also form a lever structure with the middle of the sealing end 32 as the fulcrum. The sealing lip 321 forms a reaction force on the seal 3, so that the free end 33 can hold the ball head 2 tightly, thereby increasing the reliability of the connection between the ball head 2 and the spherical groove 31.

[0075] Furthermore, a limiting flange 13 is provided at one end of the valve body 1 away from the ball head 2, and the limiting flange 13 protrudes from the surface of the valve body 1 along the radial direction of the valve body 1. When the valve body 1 is installed in the mounting hole of the cover body 02, the limiting flange 13 overlaps the cover body 02, thereby providing support and limiting effect on the valve body 1, and preventing the valve body 1 from falling off from the cover body 02.

[0076] Furthermore, a valve cavity 1a is provided inside the valve body 1, and a valve seat 1b is provided inside the valve cavity 1a; a valve core 1c can be provided in the valve cavity 1a, and the valve core 1c is slidably connected to the inner cavity of the valve body 1; the valve core 1c and the valve seat 1b cooperate with each other to open or close the pressure relief channel inside the valve body 1, so that the pressure in the pot is maintained in an appropriate range, avoiding the danger caused by excessive pressure in the pot.

[0077] Specifically, a spring 1d is installed at one end of the valve core 1c away from the valve seat 1b, and the two ends of the spring 1d elastically press against the valve core 1c and the valve body 1, so as to force the valve core 1c to press against the valve seat 1b. That is to say, under normal circumstances, a sealing fit is formed between the valve core 1c and the valve seat 1b, and the pressure relief passage inside the valve body 1 is closed, so that the valve body 1 can rise normally and a high pressure state can be formed in the pot. When the pressure in the pot exceeds a predetermined range, the pressure in the pot overcomes the elastic force of the spring 1d, so that the valve core 1c is away from the valve seat 1b, thereby opening the pressure relief passage inside the valve body 1, releasing the pressure in the pot, and ensuring safe use.

[0078] Furthermore, a groove 21 is provided at one end of the ball head 2 away from the valve body 1. The groove 21 is sunken inward from the surface of the ball head 2 and connected to the valve seat 1b, so that the groove 21 forms the actual air intake end of the pressure relief channel. That is to say, the high-pressure gas in the pot can act on the valve seat 1b only after passing through the groove 21, so that the groove 21 plays a role in filtering and blocking food residues, etc., preventing food residues from entering the valve seat 1b along with the high-pressure gas, causing problems such as blockage or adhesion of the valve seat 1b, and affecting the normal opening of the pressure relief channel. In addition, since the notch of the groove 21 is spherical, the notch area of ​​the groove 21 is increased, and the air intake direction is dispersed and adjusted, reducing the impact of the high-pressure airflow, thereby reducing the possibility of food residues passing through the groove 21.

[0079] Furthermore, the groove 21 is a strip groove extending radially along the valve body 1, that is, the width of the groove 21 is much smaller than the length of the groove 21, so that the air intake area can be effectively increased, and the risk of clogging of the groove 21 can be reduced, thereby ensuring the smoothness of the pressure relief channel. The width of the groove 21 is larger than the aperture of the valve seat 1b to increase the ventilation volume, thereby increasing the speed of gas discharge and allowing the pressure in the pot to be released quickly. The length of the groove 21 is not larger than the diameter of the opening 311 of the spherical groove 31 to prevent the groove 21 from being connected to the spherical groove 31, causing food residues to enter between the seal 3 and the ball head 2 along the groove 21, affecting the sealing performance of the seal 3.

[0080] Furthermore, the number of the grooves 21 is not less than two, and each groove 21 passes through the axis of the valve body 1 and intersects with each other. For example, when the number of the grooves 21 is two, the two grooves 21 are arranged in a cross. The grooves 21 are evenly distributed around the axis of the valve body 1, that is, the angles between any two adjacent grooves 21 are equal, so that the gas can evenly pass through the ball head 2, avoiding the ball head 2 from vibrating under the action of the airflow.

[0081] Furthermore, the stop valve assembly 01 further includes a stop member 4, which abuts against the end of the valve body 1 away from the ball head 2, that is, the stop member 4 is stacked on the top of the valve body 1, and the weight of the valve body 1 moving downward is increased without changing the valve body 1, so as to ensure that the valve body 1 can automatically descend to form a pressure relief state, so that the pot cover can be opened smoothly. The stop member 4 can slide with the cover body 02, thereby forming a guide for the stop member 4 and increasing the stability of the stop member 4.

[0082] Furthermore, a buffer chamber 41 is provided at one end of the stop member 4 facing the valve body 1, and the buffer chamber 41 is connected to the valve chamber 1a. After the high-pressure gas in the pot passes through the valve chamber 1a, it enters the buffer chamber 41 for buffering to reduce the exhaust noise; the gas in the buffer chamber 41 pushes the stop member 4 upward, thereby forming an annular exhaust gap between the buffer chamber 41 and the valve body 1, and the gas in the buffer chamber 41 is discharged from the exhaust gap, which changes the direction of gas movement and forms energy dissipation.

[0083] 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 assembly, characterized in that: include: Valve body (1); A ball head (2) connected to one end of the valve body (1); A sealing member (3), wherein the sealing member (3) is provided with a spherical groove (31), wherein the spherical groove (31) cooperates with the ball head (2) so that the sealing member (3) can deflect relative to the valve body (1) while moving with the valve body (1).

2. The check valve assembly according to claim 1, characterized in that: The sealing element (3) is configured as a sleeve structure coaxial with the valve body (1).

3. The check valve assembly according to claim 2, characterized in that: The valve body (1) comprises a limiting section (11), wherein the limiting section (11) extends above the ball head (2); One end of the sealing element (3) along its own axial direction is a sealing end (32), and the sealing end (32) is sleeved on the limiting section (11).

4. The check valve assembly according to claim 3, characterized in that: An annular gap (5) is provided between the sealing end (32) and the limiting section (11).

5. The check valve assembly according to claim 3, characterized in that: The sealing end (32) is provided with a sealing lip (321), and the sealing lip (321) protrudes from a side of the sealing end (32) away from the ball head (2) along the axial direction of the valve body (1); Along the direction away from the ball head (2), the sealing lip (321) gradually inclines in the direction away from the axis of the sealing member (3).

6. The check valve assembly according to claim 5, characterized in that: Along the radial direction of the sealing element (3), at least a portion of the sealing lip (321) is inclined beyond the edge of the sealing end (32).

7. The check valve assembly according to claim 2, characterized in that: One end of the sealing element (3) along its own axial direction is a free end (33), and the free end (33) is an elastic annular structure, wherein an opening (311) communicating with the spherical groove (31) is formed at the center of the annular structure.

8. The check valve assembly according to any one of claims 1 to 7, characterized in that: A valve cavity (1a) is provided inside the valve body (1), and a valve seat (1b) is provided inside the valve cavity (1a); A groove (21) is provided at one end of the ball head (2) away from the valve body (1); the groove (21) is recessed inwardly from the surface of the ball head (2) and is connected to the valve seat (1b).

9. The check valve assembly according to any one of claims 1 to 7, characterized in that: The stop valve assembly further comprises a stop member (4), wherein the stop member (4) abuts against an end of the valve body (1) away from the ball head (2); A buffer cavity (41) is provided at one end of the stopper (4) facing the valve body (1), a valve cavity (1a) is provided inside the valve body (1), and the buffer cavity (41) is connected to the valve cavity (1a).

10. A pressure cooker cover, characterized in that: It comprises a cover body and a check valve assembly according to any one of claims 1 to 9; The valve body is disposed through the cover body and can float up and down along the cover body; The sealing member is located below the cover body, and the sealing member moves closer to or away from the cover body as the valve body moves.

11. A pressure cooker, characterized in that: The invention comprises a pot body and the pressure cooker cover according to claim 10.

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