Anti-overflow valve, pressure cooker cover and pressure cooker

Abstract

The invention provides an anti-overflow valve, a pressure cooker cover and a pressure cooker, the anti-overflow valve comprises a valve body, the valve body is internally provided with a cavity, the cavity is used for vapor-liquid separation, the side wall of the valve body is provided with an air inlet hole, and the top of the valve body is provided with an exhaust hole; the valve element right faces the exhaust hole and can slide in the axial direction of the exhaust hole so as to open or close the exhaust hole. According to the pressure cooker, liquid in the cooker can be prevented from overflowing along with gas, 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 an anti-overflow 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. A pressure cooker is mainly composed of a pressure cooker lid and a pot body. The pressure cooker lid and the pot body are fixed to each other by means of buckles, etc. The pressure cooker lid is usually equipped with an exhaust valve to release the pressure in the pot.

[0003] In the prior art, during the process of venting and reducing the pressure of the pressure cooker lid, liquid such as soup in the pot is easily overflowed along with the gas, causing contamination of the pressure cooker or the countertop, affecting the user experience of the pressure cooker. Summary of the invention

[0004] The present application provides an anti-overflow valve, a pressure cooker cover and a pressure cooker to prevent liquid in the pot from overflowing along with gas, thereby improving the user experience of the pressure cooker.

[0005] The first aspect of the present application provides an anti-overflow valve, comprising:

[0006] A valve body, wherein the interior of the valve body has a cavity, the cavity is used for gas-liquid separation, the side wall of the valve body is provided with an air inlet hole, and the top of the valve body is provided with an exhaust hole;

[0007] A valve core is directly opposite to the exhaust hole and can slide along the axial direction of the exhaust hole to open or close the exhaust hole.

[0008] The anti-overflow valve provided in the present application includes a valve body and a valve core; the interior of the valve body has a cavity, the cavity is used for gas-liquid separation, the side wall of the valve body is provided with an air inlet hole, and the top of the valve body is provided with an exhaust hole, the mixed gas in the pot enters the cavity through the air inlet hole, and gas-liquid separation is realized in the cavity, the separated gas is discharged to the outside of the pot through the exhaust hole, and the liquid is stored in the cavity, thereby effectively preventing the liquid from being discharged to the outside of the pot along with the gas and causing overflow and other pollution, thereby improving the user experience of the pressure cooker; the valve core is directly opposite to the exhaust hole, and can slide along the axial direction of the exhaust hole to open or close the exhaust hole, so that the anti-overflow valve can realize the function of a pressure limiting valve, limit the maximum pressure in the pot, which can not only meet the needs of high-pressure cooking, but also effectively avoid liquid overflow during the exhaust and pressure reduction process.

[0009] Optionally, the valve core includes a sealing portion and a guide rod, the guide rod is inserted through the exhaust hole and forms an annular gap with the exhaust hole, and the sealing portion is located above the exhaust hole to open or close the annular gap. The exhaust hole serves as a guide structure of the valve core, which can not only improve the relative position accuracy of the valve core and the exhaust hole, ensuring that the valve core can accurately close the exhaust hole, but also allow a part of the valve core to sink inside the anti-overflow valve, thereby reducing the overall height of the anti-overflow valve and improving the compactness of the overall structure of the anti-overflow valve.

[0010] Optionally, the valve core includes a counterweight portion, which is accommodated in the cavity and connected to the guide rod. On the one hand, by arranging the counterweight portion in the cavity and increasing the weight of the valve core, the volume of the valve core exposed outside the valve body can be reduced, thereby further reducing the overall volume of the anti-overflow valve, improving the structural compactness of the anti-overflow valve, and improving the appearance of the pressure cooker cover; on the other hand, the counterweight portion forms a barrier in the cavity, and after the mixed gas flows in the cavity and encounters the counterweight portion, the gas will avoid the counterweight portion and bend away, while the liquid continues to move forward due to its large inertia, and the forward-moving liquid adheres to the surface of the counterweight portion, thereby achieving gas-liquid separation and improving the gas-liquid separation effect.

[0011] Optionally, the counterweight is rotatably connected to the guide rod. When the mixed gas rotates and flows along the inner wall of the cavity, the counterweight rotates under the action of the high-speed rotating airflow, thereby throwing off the liquid on the surface of the counterweight, avoiding excessive liquid adhering to the counterweight, causing the weight of the valve core to change, and affecting the maximum pressure in the pot.

[0012] Optionally, at least one of the top surface of the counterweight part and the top surface of the cavity is provided with a limiting protrusion, the number of the limiting protrusions is not less than two, the limiting protrusions are arranged at intervals around the axis of the valve body, and exhaust gaps are formed between adjacent limiting protrusions to prevent the counterweight part and the cavity from fitting together and closing the exhaust hole, thereby affecting the normal discharge of gas.

[0013] Optionally, a guide portion is convexly provided in the valve body, and the guide portion extends from the inner surface of the valve body toward one side along the tangential direction, and the air inlet is provided in the guide portion, and the air inlet runs through both ends of the guide portion. After the mixed gas in the pot enters the cavity through the air inlet, the initial velocity direction of the mixed gas is perpendicular to the radial direction, and the radius of the mixed gas is substantially the same as the radius of the cavity, which can ensure that the mixed gas rotates and flows along the inner wall of the cavity to achieve gas-liquid separation under the action of centrifugal force, and can maximize the centrifugal force of the mixed gas, thereby achieving a reliable gas-liquid separation effect.

[0014] Optionally, a reflux hole is provided at the bottom of the valve body, and a one-way valve is connected to the bottom of the valve body, and the one-way valve is used to open or close the reflux hole. The one-way valve can only open the reflux hole from top to bottom, and the mixed gas in the pot cannot open the one-way valve, so as to control the path of the mixed gas entering the cavity, ensure that the mixed gas rotates and flows along the inner wall of the cavity, and realize gas-liquid separation; the liquid in the cavity can open the one-way valve to release the liquid stored in the cavity, so as to avoid too much liquid stored in the cavity affecting the gas-liquid separation effect.

[0015] Optionally, the bottom of the valve body includes a confluence portion and an opening portion, the confluence portion is connected to the side wall of the valve body, the opening portion is located below the confluence portion, and closes the bottom of the confluence portion; the radial dimension of the confluence portion gradually decreases from top to bottom; the reflux hole is arranged in the opening portion, and the one-way valve is connected to the opening portion. The liquid after gas-liquid separation can gradually converge to the center of the valve body along the confluence portion, which can increase the liquid pressure per unit area of ​​the opening portion, so that the one-way valve can be opened more easily, reducing the amount of liquid retained in the cavity, and ensuring a reliable gas-liquid separation effect.

[0016] The second aspect of the present application provides a pressure cooker cover, which includes a cover body and any one of the anti-overflow valves provided in the present application, wherein the cover body is provided with a mounting hole, and the anti-overflow valve is penetrated through the mounting hole. The mixed gas in the pot enters the cavity through the air inlet hole, and realizes gas-liquid separation in the cavity. The separated gas is discharged to the outside of the pot through the exhaust hole, and the liquid is stored in the cavity, thereby effectively preventing the liquid from being discharged to the outside of the pot along with the gas and causing overflow and other pollution, thereby improving the use experience of the pressure cooker; the valve core is directly opposite to the exhaust hole, and can slide along the axial direction of the exhaust hole to open or close the exhaust hole, so that the anti-overflow valve can realize the function of a pressure limiting valve, limit the maximum pressure in the pot, and can not only meet the needs of high-pressure cooking, but also effectively avoid liquid overflow during the exhaust and pressure reduction process.

[0017] 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, wherein the pressure cooker lid is movably connected to the pot body and can be sealed with the pot body. The mixed gas in the pot enters the cavity through the air inlet, and gas-liquid separation is achieved in the cavity. The separated gas is discharged to the outside of the pot through the exhaust hole, and the liquid is stored in the cavity, thereby effectively preventing the liquid from being discharged to the outside of the pot along with the gas and causing overflow and other pollution, thereby improving the use experience of the pressure cooker; the valve core is directly opposite to the exhaust hole, and can slide along the axial direction of the exhaust hole to open or close the exhaust hole, so that the anti-overflow valve can realize the function of a pressure limiting valve, limit the maximum pressure in the pot, and can meet the needs of high-pressure cooking, and can effectively avoid liquid overflow during the exhaust and pressure reduction process.

[0018] 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

[0019] Figure 1 A schematic cross-sectional view of a pressure cooker provided in an embodiment of the present application;

[0020] Figure 2 for Figure 1 A schematic diagram of the cross-sectional structure of the pot body shown;

[0021] Figure 3 An exploded view of a pressure cooker lid provided in an embodiment of the present application;

[0022] Figure 4 A schematic diagram of the cross-sectional structure of a pressure cooker lid provided in an embodiment of the present application;

[0023] Figure 5 for Figure 4 Schematic diagram of some structures;

[0024] Figure 6 A schematic cross-sectional structure diagram of an anti-overflow valve provided in an embodiment of the present application;

[0025] Figure 7 A schematic diagram of the structure of the counterweight part provided in an embodiment of the present application;

[0026] Figure 8 A schematic diagram of a cross section of an air inlet of a valve body provided in an embodiment of the present application;

[0027] Fig. 9 A schematic diagram of the cross-sectional structure of a valve seat provided in an embodiment of the present application;

[0028] Fig.10 A schematic diagram of the cross-sectional structure of the valve cover provided in an embodiment of the present application.

[0029] Reference numerals:

[0030] 10- pot body;

[0031] 10a-first pot teeth;

[0032] 20-Pressure cooker lid;

[0033] 20a-second pot teeth;

[0034] 1-cover body;

[0035] 11-Mounting hole;

[0036] 12- elastic part;

[0037] 13- Rigid part;

[0038] 14- groove;

[0039] 2- Anti-overflow valve;

[0040] 2a-installation part;

[0041] 2b-limiting groove;

[0042] 21- Seal;

[0043] 22-valve body;

[0044] 22a-valve seat;

[0045] 22b-valve cover;

[0046] 221- cavity;

[0047] 222-air inlet;

[0048] 223- Exhaust hole;

[0049] 224- guide part;

[0050] 225-return hole;

[0051] 226-Confluence;

[0052] 227- opening portion;

[0053] 23- one-way valve;

[0054] 24-valve core;

[0055] 241- sealing part;

[0056] 242-guide rod;

[0057] 243- counterweight;

[0058] 243a-limiting protrusion;

[0059] 243b-convex part;

[0060] 243c-concave;

[0061] 3- Support seat;

[0062] 31-card slot;

[0063] 4-Hijab;

[0064] 41-Active buckle;

[0065] 42-unbuttoning part;

[0066] 5- Screws.

[0067] 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

[0068] 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.

[0069] 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.

[0070] 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.

[0071] like Figure 1-Figure 4 As shown, the embodiment of the present application provides a pressure cooker, which includes a pot body 10 and a pressure cooker cover 20. The pressure cooker cover 20 is movably connected to the pot body 10 and can be sealed with the pot body 10 so that high pressure can be generated in the pot to meet the requirements of high-pressure cooking. Among them, the inner wall of the pot body 10 can be convexly provided with a plurality of first pot teeth 10a, and each first pot tooth 10a is arranged at intervals along the circumference of the pot body 10; the outer wall of the cover body 1 can be convexly provided with second pot teeth 20a, and each second pot tooth 20a is arranged at intervals along the circumference of the cover body 1. When the pressure cooker cover 20 needs to be covered on the pot body 10, the second pot teeth 20a are directly opposite to the intervals between the first pot teeth 10a, and the pressure cooker cover 20 is moved from top to bottom; when the pressure cooker cover 20 is moved into place, the pressure cooker cover 20 is rotated so that the second pot teeth 20a are stopped below the first pot teeth 10a, thereby realizing the installation and fixation of the pressure cooker cover 20.

[0072] like Figure 3-Figure 6As shown, the pressure cooker cover 20 provided in the embodiment of the present application includes a cover body 1 and an anti-overflow valve 2. The cover body 1 is provided with a mounting hole 11, and the anti-overflow valve 2 is penetrated through the mounting hole 11. The inner and outer sides of the cooker cover are connected through the anti-overflow valve 2, so that the gas in the cooker can be discharged to the outside of the cooker through the anti-overflow valve 2. The anti-overflow valve 2 and the mounting hole 11 can form a sealing fit to prevent the gas in the cooker from leaking along the mounting hole 11.

[0073] Furthermore, the pressure cooker cover 20 provided in the embodiment of the present application also includes a support seat 3. The cover body 1 has an elastic portion 12 around the mounting hole 11, and the sealing member 21 is located below the elastic portion 12. The support seat 3 is connected to the outside of the elastic portion 12 of the cover body 1, and the anti-overflow valve 2 is installed on the support seat 3, and the anti-overflow valve 2 is supported and fixed by the support seat 3. In a natural state, the anti-overflow valve 2 is sealed with the lower side of the elastic portion 12 (for example, a conical surface seal, etc.), the anti-overflow valve 2 closes the mounting hole 11, and the anti-overflow valve 2 is used to separate the gas and liquid and then exhaust and release the pressure to prevent the liquid from overflowing with the gas, thereby improving the user experience of the pressure cooker. When the anti-overflow valve 2 is blocked or other abnormalities occur and cannot be exhausted normally, the pressure in the pot will increase rapidly. When the pressure in the pot is too high, the elastic part 12 will deform upward, that is, the cover body 1 will bulge upward with the mounting hole 11 as the center, and the anti-overflow valve 2 will remain in its original position under the action of the support seat 3. The anti-overflow valve 2 and the elastic part 12 will separate from each other, and the anti-overflow valve 2 will open the mounting hole 11 to exhaust and release pressure through the mounting hole 11, thereby playing a safety protection role and preventing the pressure in the pot from being too high and causing dangers such as explosion.

[0074] In addition, after the pressure in the pot is reduced to a normal range by exhausting the gas through the mounting hole 11, the elastic part 12 can automatically restore its deformation and fit with the anti-overflow valve 2, without the need to replace parts, thereby reducing the use cost and maintenance cost of the pressure cooker. In addition, the embodiment of the present application uses the deformation of the cover body 1 itself to achieve an explosion-proof effect, and the various components do not actually move, thereby effectively preventing the components from popping out under the impact of high-pressure gas, thereby improving the safety of the pressure cooker cover 20.

[0075] Furthermore, the anti-overflow valve 2 is provided with a sealing member 21, which can be made of elastic materials such as silicone or rubber. The anti-overflow valve 2 forms a sealing fit with the cover body 1 through the elastic sealing member 21 to reduce the fitting accuracy requirements between the anti-overflow valve 2 and the cover body 1 and reduce production costs.

[0076] Furthermore, a mounting portion 2a is convexly provided on the top of the anti-overflow valve 2, and a sealing member 21 is sleeved on the mounting portion 2a. The mounting portion 2a is penetrated through the mounting hole 11 to form a radial limit for the sealing member 21; an annular limit groove 2b is provided on the outer periphery of the mounting portion 2a, and the sealing member 21 is installed in the limit groove 2b to form an axial limit for the sealing member 21; the sealing member 21 elastically presses against the lower surface of the cover body 1, thereby achieving a sealing fit between the sealing member 21 and the mounting hole 11.

[0077] Furthermore, the cover body 1 is integrally formed of a metal sheet. The area of ​​the cover body 1 surrounding the mounting hole 11 lacks support and reinforcement, so it has low rigidity and is easily deformed, thereby forming an elastic portion 12; the area of ​​the cover body 1 close to the edge (i.e., the area away from the mounting hole 11) has high rigidity and is not easily deformed, thereby forming a rigid portion 13, because the edge flange and other structures form support and reinforcement. As a result, the cover body 1 can be made of a single material, thereby improving the integrity of the cover body 1. It can be understood that in other embodiments, the elastic portion 12 and the rigid portion 13 can also be made of different materials, as long as the elastic portion 12 is more easily deformed than the rigid portion 13.

[0078] Furthermore, the support seat 3 is a rigid member that is not easily deformed. The support seat 3 is connected to the rigid portion 13 of the cover body 1 to increase the stability of the support seat 3 and prevent the support seat 3 from being displaced or deformed as the elastic portion 12 is deformed, so as to ensure that when the elastic portion 12 bulges and deforms upward, the anti-overflow valve 2 remains in its original position. It can be understood that in other embodiments, when the elastic portion 12 deforms in a direction away from the sealing member 21, the anti-overflow valve 2 can move slightly upward. As long as the moving distance of the anti-overflow valve 2 is much smaller than the deformation amount of the elastic portion 12, the elastic portion 12 and the sealing member 21 can be separated from each other.

[0079] Specifically, the support seat 3 is stacked on one side of the cover body 1. For example, the support seat 3 can be stacked above the cover body 1, or the support seat 3 can be stacked below the cover body 1. The support seat 3 extends radially along the cover body 1. For example, the support seat 3 can be configured as a rod or plate extending radially along the cover body 1, or the support seat 3 can be configured as a circular plate with a cross-section smaller than the cover body 1. The support seat 3 and the cover body 1 can be connected to each other in a detachable manner such as screws 5 or buckles, or can be connected to each other in a non-detachable manner such as integral molding. Similarly, the support seat 3 and the anti-overflow valve 2 can be connected to each other in a detachable manner such as screws 5 or buckles, or can be connected to each other in a non-detachable manner such as integral molding.

[0080] Furthermore, the support seat 3 is stacked above the cover body 1, and a groove 14 is provided on the top of the cover body 1. The support seat 3 is arranged in the groove 14 to reduce the overall height of the cover body 1, thereby reducing the overall volume of the pressure cooker cover 20 and improving the compactness of the pressure cooker cover 20 structure.

[0081] Furthermore, the pressure cooker cover 20 further includes a cover head 4, and the user lifts the pressure cooker cover 20 by holding the cover head 4. The cover head 4 covers the groove 14, so that the support seat 3 and the anti-overflow valve 2 and other components are hidden inside the pressure cooker cover 20, thereby improving the appearance of the pressure cooker cover 20. The cover head 4 is detachably connected to the cover body 1 or the support seat 3 to facilitate the maintenance or replacement of the internal components such as the anti-overflow valve 2.

[0082] Specifically, a movable buckle 41 may be provided at one end of the cover head 4 facing the cover body 1, and a slot 31 may be provided at the cover body 1 or the support seat 3. In a natural state, the movable buckle 41 and the slot 31 are locked with each other, and the cover head 4 is stably mounted and fixed to the cover body 1; when the user applies an external force to the movable buckle 41, the movable buckle 41 and the slot 31 are disengaged, and the cover head 4 can be disassembled and removed. The movable buckle 41 is connected to a release portion 42, and at least a portion of the release portion 42 is exposed to the outside of the cover head 4. By driving the movable buckle 41 to be disengaged from the slot 31 through the release portion 42, the operation can be more convenient and labor-saving, thereby improving the convenience of operation.

[0083] like Figure 6-Figure 10 As shown, further, the anti-overflow valve 2 includes a valve body 22, and the valve body 22 has a cavity 221 inside, and the cavity 221 is used for gas-liquid separation. The side wall of the valve body 22 is provided with an air inlet 222, and the air inlet 222 communicates with the outside of the valve body 22 and the cavity 221; the top of the valve body 22 is provided with an exhaust hole 223, and the exhaust hole 223 communicates with the outside of the valve body 22 and the cavity 221. The mixed gas in the pot enters the cavity 221 through the air inlet 222, and the gas-liquid separation is achieved in the cavity 221. For example, the gas-liquid separation can be achieved in the cavity 221 by any appropriate method such as gravity sedimentation, inertial separation or centrifugal separation. The separated gas is discharged to the outside of the pot through the exhaust hole 223, and the liquid is stored in the cavity 221, thereby effectively preventing the liquid from being discharged to the outside of the pot together with the gas, causing overflow and other pollution, thereby improving the use experience of the pressure cooker.

[0084] Furthermore, the anti-overflow valve 2 also includes a valve core 24, which is directly opposite to the exhaust hole 223 and can slide along the axial direction of the exhaust hole 223 to open or close the exhaust hole 223, so that the anti-overflow valve 2 can realize the function of a pressure-limiting valve, limit the maximum pressure in the pot, and can not only meet the needs of high-pressure cooking, but also effectively avoid liquid overflow during the exhaust and pressure reduction process. Specifically, when the valve core 24 closes the exhaust hole 223, a sealed state is formed in the pot, so that the pressure in the pot can be increased to meet the needs of high-pressure cooking; when the valve core 24 opens the exhaust hole 223, a pressure relief state is formed in the pot, and the mixed gas in the pot quickly enters the cavity 221 of the anti-overflow valve 2 from the air inlet 222, and realizes gas-liquid separation in the cavity 221, and the gas after gas-liquid separation is discharged from the exhaust hole 223, so that the pressure in the pot can be reduced, and liquid overflow will not occur.

[0085] Specifically, a guide structure may be provided around the valve core 24, and the movement direction of the valve core 24 is limited by the guide structure to ensure that the valve core 24 can slide along the axial direction of the exhaust hole 223. The guide structure may be provided at any appropriate position such as the valve body 22, the cover body 1 or the cover head 4, as long as it can play the expected guiding role for the valve core 24.

[0086] In one embodiment, the valve core 24 includes a sealing portion 241 and a guide rod 242. The guide rod 242 is inserted through the exhaust hole 223 to form an annular gap with the exhaust hole 223. The sealing portion 241 is located above the exhaust hole 223 to open or close the annular gap. The exhaust hole 223 serves as a guide structure for the valve core 24, which can improve the relative position accuracy between the valve core 24 and the exhaust hole 223, ensure that the valve core 24 can accurately close the exhaust hole 223, and enable a part of the valve core 24 to sink into the interior of the anti-overflow valve 2, thereby reducing the overall height of the anti-overflow valve 2 and improving the compactness of the overall structure of the anti-overflow valve 2.

[0087] Specifically, a conical surface or an arc surface may be provided on the side of the sealing portion 241 facing the exhaust hole 223, and a sealing fit is formed with the exhaust hole 223 through the conical surface or the arc surface. On the one hand, the sealing area can be reduced and the reliability of the sealing fit can be increased; on the other hand, it can play the role of automatic centering to prevent the valve core 24 from deviating from the exhaust hole 223 and affecting the sealing effect.

[0088] Furthermore, the sealing portion 241 and the guide rod 242 are integrally formed. This can reduce processing errors, improve the accuracy of the valve core 24 itself, and reduce the number of parts and components, thereby reducing production costs. It is understandable that in other embodiments, the sealing portion 241 and the guide rod 242 can also be configured as two separate components, and are connected to each other into a whole by means of threaded fitting or the like.

[0089] Furthermore, the valve core 24 includes a weight portion 243, which is accommodated in the cavity 221 and connected to the guide rod 242. On the one hand, by arranging the weight portion 243 in the cavity 221, the weight of the valve core 24 is increased, and the volume of the valve core 24 exposed outside the valve body 22 can be reduced, thereby further reducing the overall volume of the anti-overflow valve 2, improving the compactness of the structure of the anti-overflow valve 2, and improving the appearance of the pressure cooker cover 20; on the other hand, the weight portion 243 forms a barrier in the cavity 221, and after the mixed gas flows in the cavity 221 and encounters the weight portion 243, the gas will avoid the weight portion 243 and bend away, and the liquid will continue to move forward due to its large inertia, and the forward-moving liquid will adhere to the surface of the weight portion 243, thereby achieving gas-liquid separation and improving the effect of gas-liquid separation.

[0090] There is a gap between the top surface of the counterweight 243 and the top surface of the cavity 221 to provide the valve core 24 with an axial movement stroke along the exhaust hole 223 to avoid interference between the counterweight 243 and the valve body 22, which causes the valve core 24 to be unable to normally open the exhaust hole 223. The counterweight 243 can stop at the top surface of the cavity 221, and play an axial limiting role on the valve core 24 to prevent the valve core 24 from detaching from the valve body 22 and falling.

[0091] Furthermore, at least one of the top surface of the counterweight portion 243 and the top surface of the cavity 221 is provided with a limiting protrusion 243a, and the number of the limiting protrusions 243a is not less than two. The limiting protrusions 243a are arranged at intervals around the axis of the valve body 22, and an exhaust gap is formed between adjacent limiting protrusions 243a to prevent the counterweight portion 243 and the cavity 221 from fitting together and closing the exhaust hole 223, thereby affecting the normal discharge of the gas.

[0092] Specifically, the limiting protrusion 243a can be configured as any appropriate structure such as a convex point or a strip. When the limiting protrusion 243a is configured as a strip, the limiting protrusion 243a can extend along the radial direction of the valve body 22, or the limiting protrusion 243a can also extend along the circumferential direction of the valve body 22.

[0093] Furthermore, the counterweight 243 is rotatably connected to the guide rod 242. When the mixed gas rotates and flows along the inner wall of the cavity 221, the counterweight 243 rotates under the action of the high-speed rotating airflow, thereby throwing off the liquid on the surface of the counterweight 243, avoiding excessive liquid adhering to the counterweight 243, causing the weight of the valve core 24 to change, and affecting the maximum pressure in the pot.

[0094] Specifically, the counterweight 243 is sleeved on the outer periphery of the guide rod 242, and an axial fixing structure such as a buckle, a retaining spring or a nut can be provided below the counterweight 243 to provide axial support for the counterweight 243, so that the counterweight 243 can be stably installed on the guide rod 242. In addition, the counterweight 243 is detachably connected to the guide rod 242, which can facilitate the disassembly and cleaning of the valve core 24.

[0095] Furthermore, the counterweight 243 is configured as a circular columnar structure with a larger diameter and a smaller height, which can not only increase the circumferential surface of the counterweight 243, increase the liquid adhesion area, and improve the vapor-liquid separation effect, but also increase the torque applied by the rotating airflow to the counterweight 243, and increase the rotation speed of the counterweight 243. In addition, the downward extension distance of the counterweight 243 can be reduced as much as possible to prevent the liquid or foam in the pot from contacting the counterweight 243, resulting in problems such as contamination or weight change of the counterweight 243. It can be understood that in other embodiments, the counterweight 243 can also be configured in other shapes as needed, such as a cone or polygonal column.

[0096] Furthermore, the circumferential surface of the counterweight portion 243 may be provided with alternately arranged convex portions 243 b and concave portions 243 c , so as to further increase the circumferential surface of the counterweight portion 243 and increase the area of ​​action of the rotating airflow on the counterweight portion 243 .

[0097] Furthermore, the valve body 22 may include a valve seat 22a and a valve cover 22b, the valve cover 22b being detachably connected to the bottom of the valve seat 22a, and the valve cover 22b and the valve seat 22a enclose the above-mentioned cavity 221 to facilitate the installation and cleaning of the internal parts of the valve body 22. The air inlet 222 may be provided on the side wall of the valve seat 22a, or on the side wall of the valve cover 22b, as long as it can communicate with the cavity 221. The side wall of the anti-overflow valve 2 may be provided with only one air inlet 222, or may be provided with two or more air inlet 222. When the anti-overflow valve 2 is provided with two or more air inlet 222, each air inlet 222 is symmetrically provided around the axis center of the valve body 22.

[0098] In one embodiment, a guide portion 224 is convexly provided inside the valve body 22, and the guide portion 224 extends from the inner surface of the valve body 22 toward one side along the tangential direction, and the air inlet 222 is provided on the guide portion 224, and the air inlet 222 passes through both ends of the guide portion 224. After the mixed gas in the pot enters the cavity 221 through the air inlet 222, the initial velocity direction of the mixed gas is perpendicular to the radial direction, and the radius of the mixed gas is substantially the same as the radius of the cavity 221, which can ensure that the mixed gas rotates and flows along the inner wall of the cavity 221 to achieve gas-liquid separation under the action of centrifugal force, and can maximize the centrifugal force of the mixed gas, thereby achieving a reliable gas-liquid separation effect. It can be understood that in other embodiments, the guide portion 224 may not be provided, and a through hole may be directly provided on the side wall of the valve body 22; or a gap may be provided between the guide portion 224 and the inner surface of the valve body 22; further, the guide portion 224 may extend from the inner surface of the valve body 22 toward one side along the chord direction.

[0099] Furthermore, a reflux hole 225 is provided at the bottom of the valve body 22, and a one-way valve 23 is connected to the bottom of the valve body 22, and the one-way valve 23 is used to open or close the reflux hole 225. Specifically, the one-way valve 23 can only open the reflux hole 225 from top to bottom, and the mixed gas in the pot cannot open the one-way valve 23, so as to control the path of the mixed gas entering the cavity 221, ensure that the mixed gas rotates and flows along the inner wall of the cavity 221, and realize gas-liquid separation; the liquid in the cavity 221 can open the one-way valve 23 to release the liquid stored in the cavity 221, so as to avoid excessive liquid stored in the cavity 221 affecting the gas-liquid separation effect.

[0100] Specifically, the one-way valve 23 includes a connecting portion and an elastic valve flap. The connecting portion is connected and fixed to the bottom of the valve body 22. For example, the connecting portion can be connected to the bottom of the valve body 22 in a detachable manner such as a snap or a thread, or can be connected to the bottom of the valve body 22 in an irremovable manner such as bonding, as long as the installation and fixation of the one-way valve 23 can be achieved. In a natural state, the elastic valve flap elastically presses against the lower surface of the valve body 22, thereby closing the reflux hole 225; when there is too much liquid stored in the cavity 221, the elastic valve flap flips downward and deforms under the action of the liquid pressure, thereby opening the reflux hole 225.

[0101] The bottom of the valve body 22 may be provided with only one reflux hole 225 or may be provided with two or more reflux holes 225. When two or more reflux holes 225 are provided at the bottom of the valve body 22, the reflux holes 225 are arranged at intervals around the axis of the valve body 22.

[0102] Furthermore, the bottom of the valve body 22 includes a confluence portion 226 and an opening portion 227. The confluence portion 226 is connected to the side wall of the valve body 22, and the opening portion 227 is located below the confluence portion 226. The opening portion 227 extends in the radial direction of the valve body 22 to close the bottom of the confluence portion 226. Along the top-down direction, the radial dimension of the confluence portion 226 gradually decreases; the reflux hole 225 is provided in the opening portion 227, and the one-way valve 23 is connected to the opening portion 227. The liquid after the gas-liquid separation can gradually converge to the center of the valve body 22 along the confluence portion 226, which can increase the liquid pressure per unit area of ​​the opening portion 227, so that the one-way valve 23 can be opened more easily, reducing the amount of liquid retained in the cavity 221, and ensuring a reliable gas-liquid separation effect. It can be understood that in other embodiments, the bottom of the valve body 22 can also be directly set to a plane or other structure.

[0103] 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. An anti-overflow valve, characterized in that: include: A valve body (22), wherein the interior of the valve body (22) is provided with a cavity (221), the cavity (221) is used for gas-liquid separation, a side wall of the valve body (22) is provided with an air inlet (222), and a top of the valve body (22) is provided with an air exhaust hole (223); A valve core (24), the valve core (24) is directly opposite to the exhaust hole (223) and can slide along the axial direction of the exhaust hole (223) to open or close the exhaust hole (223).

2. The anti-overflow valve according to claim 1, characterized in that: The valve core (24) comprises a sealing portion (241) and a guide rod (242); the guide rod (242) is arranged to pass through the exhaust hole (223) and form an annular gap between the guide rod (242) and the exhaust hole (223); the sealing portion (241) is located above the exhaust hole (223) to open or close the annular gap.

3. The anti-overflow valve according to claim 2, characterized in that: The valve core (24) comprises a counterweight portion (243), the counterweight portion (243) is accommodated in the cavity (221), and the counterweight portion (243) is connected to the guide rod (242).

4. The anti-overflow valve according to claim 3, characterized in that: The counterweight portion (243) is rotatably connected to the guide rod (242).

5. The anti-overflow valve according to claim 3, characterized in that: At least one of the top surface of the counterweight portion (243) and the top surface of the cavity (221) is provided with a limiting protrusion (243a), and the number of the limiting protrusions (243a) is not less than two. The limiting protrusions (243a) are arranged at intervals around the axis of the valve body (22), and an exhaust gap is formed between adjacent limiting protrusions (243a).

6. The anti-overflow valve according to any one of claims 1 to 5, characterized in that: A guide portion (224) is protrudingly provided inside the valve body (22), and the guide portion (224) extends from the inner surface of the valve body (22) toward one side along a tangential direction. The air inlet hole (222) is provided on the guide portion (224), and the air inlet hole (222) passes through both ends of the guide portion (224).

7. The anti-overflow valve according to any one of claims 1 to 5, characterized in that: The bottom of the valve body (22) is provided with a reflux hole (225), and the bottom of the valve body (22) is connected to a one-way valve (23), and the one-way valve (23) is used to open or close the reflux hole (225).

8. The anti-overflow valve according to claim 7, characterized in that: The bottom of the valve body (22) comprises a confluence portion (226) and an opening portion (227), the confluence portion (226) being connected to a side wall of the valve body (22), and the opening portion (227) being located below the confluence portion (226) and closing the bottom of the confluence portion (226); Along the direction from top to bottom, the radial dimension of the confluence portion (226) gradually decreases; The reflux hole (225) is disposed in the opening portion (227), and the one-way valve (23) is connected to the opening portion (227).

9. A pressure cooker cover, characterized in that: It comprises a cover body (1) and the anti-overflow valve according to any one of claims 1 to 8, wherein the cover body (1) is provided with a mounting hole (11), and the anti-overflow valve is passed through the mounting hole (11).

10. A pressure cooker, characterized in that: The pressure cooker comprises a pot body and the pressure cooker cover according to claim 9, wherein the pressure cooker cover is movably connected to the pot body and can achieve sealing cooperation with the pot body.

Images