Pressure limiting valve, pressure cooker cover and pressure cooker

Abstract

The utility model provides a pressure limiting valve, a pressure cooker cover and a pressure cooker. The pressure limiting valve comprises an exhaust pipe; the valve element comprises a sealing part and a flow guide part which are located above the exhaust pipe, the sealing part is used for opening or closing the exhaust pipe, and the flow guide part surrounds the outer edge of the sealing part; at least two air guide grooves are formed in the bottom face of the flow guide part, the air guide grooves extend in an arc mode in the direction away from the axis of the valve element, and the air guide grooves are distributed around the axis of the valve element in an annular array mode. The risk that the pressure limiting valve is blocked in the using process can be reduced, and the using safety 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 pressure limiting valve, a pressure cooker cover, and a pressure cooker. Background Art

[0002] A pressure cooker is a common cooking appliance. Its primary function is to increase the temperature and speed of cooking by increasing the pressure within the cooker. A pressure cooker consists of a lid and a pot, secured together with a snap-fit ​​mechanism. The lid is typically equipped with a pressure-limiting valve to control the pressure within the pot. During use, food residue can easily clog the valve, leading to excessive pressure and accidents such as explosions. Utility Model Content

[0003] The present application provides a pressure limiting valve, a pressure cooker cover and a pressure cooker, so as to reduce the risk of blockage of the pressure limiting valve during use and improve the safety of the pressure cooker.

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

[0005] exhaust pipe;

[0006] a valve core, comprising a sealing portion and a flow guide portion located above the exhaust pipe, wherein the sealing portion is used to open or close the exhaust pipe, and the flow guide portion surrounds an outer edge of the sealing portion;

[0007] The bottom surface of the guide portion is provided with at least two air guide grooves, and the air guide grooves extend in an arc along a direction away from the axis of the valve core, and the air guide grooves are distributed in a ring array around the axis of the valve core.

[0008] The pressure limiting valve provided in the present application includes an exhaust pipe and a valve core, and the valve core includes a sealing part and a guide part located above the exhaust pipe, the sealing part is used to open or close the exhaust pipe, and the guide part surrounds the top outer edge of the sealing part; the bottom surface of the guide part is provided with at least two air guide grooves, and when the sealing part opens the exhaust pipe, the gas discharged from the exhaust pipe can enter the air guide groove and flow along the extension direction of the air guide groove; the air guide groove extends in an arc along the direction away from the axis of the valve core, and in the process of the gas flowing in the air guide groove, the groove wall of the air guide groove provides a force to the gas so that the flow direction of the gas is gradually deflected, and at the same time, the gas provides a reaction force to the groove wall of the air guide groove so that the valve core can rotate rapidly in the opposite direction, thereby achieving the purpose of automatically cleaning blockages such as food residues, and effectively reducing the risk of blockage of the pressure limiting valve during use; the air guide grooves are distributed in a ring array around the axis of the valve core, so that the valve core is evenly stressed circumferentially, thereby improving the stability of the valve core rotation.

[0009] Optionally, the valve core further includes a rod portion, which is located below the sealing portion and extends axially along the valve core, and the rod portion is inserted into the exhaust pipe. On the one hand, the rod portion guides the valve core inside the exhaust pipe, thereby improving the relative position accuracy of the valve core and the exhaust pipe, ensuring that the valve core can accurately close the exhaust hole, and allowing a portion of the valve core to sink inside the exhaust pipe, thereby reducing the external volume of the pressure-limiting valve, improving the compactness of the overall structure of the pressure-limiting valve, and improving the appearance of the pressure cooker lid; on the other hand, the rod portion forms an annular gap inside the exhaust pipe, and exhaust is carried out through the annular gap, which can act as a filter to prevent blockages such as food residues from entering the exhaust pipe, thereby reducing the risk of exhaust pipe blockage.

[0010] Optionally, the pressure-limiting valve further includes a counterweight, located below the exhaust pipe and detachably connected to the rod. Positioning the counterweight on the inner side of the lid reduces the volume of the pressure-limiting valve exposed outside the lid, improving the compactness and aesthetics of the pressure cooker lid. Furthermore, the gap between the top surface of the counterweight and the bottom surface of the exhaust pipe limits the axial movement of the valve core along the exhaust pipe, preventing the valve core from separating from the exhaust pipe and falling.

[0011] Optionally, an exhaust groove is provided on the top surface of the counterweight opposite to the rod, and the exhaust groove extends radially along the counterweight and passes through the edge of the counterweight to prevent the counterweight from completely fitting into the exhaust pipe and closing the exhaust pipe when the valve core rises, thereby affecting the normal discharge of gas.

[0012] Optionally, the outer surface of the stem is provided with at least two ridges extending axially along the valve core, the ridges being spaced circumferentially around the valve core, with an exhaust gap formed between adjacent ridges. On the one hand, the ridges act as scrapers, effectively clearing obstructions during valve core rotation; on the other hand, the exhaust gap reduces the circumferential contact area between the stem and the exhaust pipe, thereby reducing the resistance to the valve core's movement within the exhaust pipe and increasing the valve core's rotational speed.

[0013] Optionally, an annular gas collecting groove is provided on the bottom surface of the guide portion, located at one end of the gas guide groove proximal to the axis of the valve core, with each of the gas guide grooves interconnected. Since the gas discharged from the exhaust pipe is annular, the use of an annular gas collecting groove can improve gas collection efficiency and reduce gas diffusion. Gas collected by the gas collecting groove is redistributed to the various gas guide grooves, thereby increasing the amount of gas entering the gas guide groove and the gas flow rate.

[0014] Optionally, the end of the air guide groove away from the axis of the valve core is provided with a flared section with gradually increasing width, which can not only allow the gas to fully expand at the outlet of the air guide groove and reduce thrust loss, but also avoid the formation of a sharp angle between the groove wall of the air guide groove and the edge of the guide part, thereby improving the safety of the pressure limiting valve.

[0015] Optionally, the pressure-limiting valve further includes a liquid collecting member, which is sleeved around the outer periphery of the exhaust pipe and has an upwardly opening cavity-like structure. The liquid collecting member collects condensed water and other liquids generated during the exhaust process, preventing the liquid from contaminating the pressure cooker lid or stovetop, thereby improving the user experience.

[0016] A second aspect of the present application provides a pressure cooker lid, comprising a lid body and any one of the pressure-limiting valves provided herein, wherein the exhaust pipe is provided through the lid body and is connected and fixed to the lid body. When the sealing portion opens the exhaust pipe, gas discharged from the exhaust pipe can enter the gas guide groove and flow along the extension direction of the gas guide groove; the gas guide groove extends in an arc in a direction away from the axis of the valve core. During the process of gas flowing in the gas guide groove, the groove wall of the gas guide groove provides a force on the gas, causing the gas flow direction to gradually deflect. At the same time, the gas provides a reaction force on the groove wall of the gas guide groove, causing the valve core to rotate rapidly in the opposite direction, thereby automatically cleaning blockages such as food residues and effectively reducing the risk of blockage of the pressure-limiting valve during use; the gas guide grooves are distributed in an annular array around the axis of the valve core, so that the valve core is evenly stressed circumferentially, improving the stability of the valve core rotation.

[0017] A third aspect of the present application provides a pressure cooker comprising a cooker body and any one of the pressure cooker lids provided herein, the pressure cooker lid being movably connected to the cooker body and capable of sealing with the cooker body. When the sealing portion opens the exhaust pipe, gas discharged from the exhaust pipe can enter the gas guide groove and flow along the extension direction of the gas guide groove; the gas guide groove extends in an arc in a direction away from the axis of the valve core. During the process of gas flowing in the gas guide groove, the groove wall of the gas guide groove provides a force on the gas, causing the gas flow direction to gradually deflect. At the same time, the gas provides a reaction force on the groove wall of the gas guide groove, causing the valve core to rotate rapidly in the opposite direction, thereby automatically clearing blockages such as food residues and effectively reducing the risk of blockage of the pressure limiting valve during use; the gas guide grooves are distributed in an annular array around the axis of the valve core, so that the valve core is evenly stressed circumferentially, improving the stability of the valve core rotation.

[0018] It should be understood that the foregoing general description and the following detailed description are merely illustrative and are not restrictive of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 A schematic diagram of a portion of the structure of the pressure cooker lid provided in an embodiment of the present application with the exhaust pipe closed;

[0020] Figure 2 A schematic diagram of a portion of the structure of the pressure cooker lid provided in an embodiment of the present application with the exhaust pipe open;

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

[0022] Figure 4 A schematic diagram of a valve core at one angle provided in an embodiment of the present application;

[0023] Figure 5 This is a schematic structural diagram of the valve core from another angle provided in an embodiment of the present application.

[0024] Reference numerals:

[0025] 1- Exhaust pipe;

[0026] 2-valve core;

[0027] 21- sealing portion;

[0028] 22- diversion part;

[0029] 221-air guide groove;

[0030] 221a- flared section;

[0031] 222-gas collecting tank;

[0032] 23-rod;

[0033] 231-convex strip;

[0034] 232-Exhaust gap;

[0035] 3-Counterweight;

[0036] 31- exhaust slot;

[0037] 4-liquid collecting piece;

[0038] 5-threaded fasteners;

[0039] 6- Cover body.

[0040] 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

[0041] In order to make the purpose, technical solutions and advantages of this application more clearly understood, the present application is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain this application and are not intended to limit this application.

[0042] In the description of this application, unless otherwise specified or limited, the terms "first" and "second" are used for descriptive purposes only and are not to 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 mean a fixed connection, a detachable connection, an integral connection, or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium. For those skilled in the art, the specific meanings of the above terms in this application can be understood according to the specific circumstances.

[0043] 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 from the perspectives 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 be understood that when it is mentioned that an element is connected to another element "on" or "under", it can not only be directly connected to the other element "on" or "under", but also indirectly connected to the other element "on" or "under" through an intermediate element.

[0044] like Figures 1-5 As shown, an embodiment of the present application provides a pressure-limiting valve that can be applied to a lid 6 and, together with the lid 6, constitutes a pressure cooker lid. The pressure-limiting valve includes an exhaust pipe 1 and a valve core 2. The exhaust pipe 1 is used to connect the inside and outside of the lid 6. That is, the upper side of the exhaust pipe 1 is the outer side of the lid 6, and the lower side of the exhaust pipe 1 is the inner side of the lid 6, so that the gas in the pot can be discharged to the outside of the pot through the pressure-limiting valve; the valve core 2 faces the exhaust pipe 1 and can slide along the axial direction of the exhaust pipe 1 to open or close the exhaust pipe 1, thereby allowing the pressure-limiting valve to limit the maximum pressure in the pot.

[0045] Specifically, exhaust pipe 1 is connected and fixed to lid 6 to secure the pressure-limiting valve. Exhaust pipe 1 can be detachably connected to lid 6 using nuts or snaps, or non-detachably connected using welding or integral molding, as long as it secures exhaust pipe 1 to lid 6. When valve core 2 closes exhaust pipe 1, the pot is sealed, increasing the pressure within the pot and meeting high-pressure cooking requirements. When valve core 2 opens exhaust pipe 1, a pressure relief state is established within the pot, allowing gas within the pot to be discharged through exhaust pipe 1, thereby reducing the pressure within the pot.

[0046] The valve core 2 includes a sealing portion 21, which is located above the exhaust pipe 1 to open or close it. The side of the sealing portion 21 facing the exhaust pipe 1 can be provided with a conical or curved surface, which forms a seal with the exhaust pipe 1. This reduces the sealing area and increases the reliability of the seal. Furthermore, it provides automatic centering, preventing the valve core 2 from deviating from the exhaust pipe 1 and affecting the sealing effect.

[0047] Further, the valve core 2 further comprises a flow guide part 22 located above the exhaust pipe 1, and the flow guide part 22 surrounds the outer edge of the sealing part 21. The bottom surface of the flow guide part 22 is provided with a gas guide groove 221. When the sealing part 21 opens the exhaust pipe 1, the gas discharged by the exhaust pipe 1 can enter the gas guide groove 221 and flow along the extension direction of the gas guide groove 221. The gas guide groove 221 is recessed on the bottom surface of the flow guide part 22, which is easy to process and form, so that the extension direction of the gas guide groove 221 can be reasonably designed according to the needs, so that the gas flows in the expected direction. The gas guide groove 221 extends in an arc shape away from the axis of the valve core 2. During the flow of the gas in the gas guide groove 221, the groove wall of the gas guide groove 221 provides a force to the gas to gradually deflect the flow direction of the gas, and at the same time, the gas provides a reaction force to the groove wall of the gas guide groove 221 to enable the valve core 2 to rotate in the opposite direction quickly, so as to achieve the purpose of automatically cleaning the blockage such as food residues, and effectively reduce the risk of blockage of the pressure limiting valve during use. The number of gas guide grooves 221 is at least two, and each gas guide groove 221 is arranged in a ring array around the axis of the valve core 2, so as to uniformly distribute the force around the valve core 2 and improve the stability of the rotation of the valve core 2.

[0048] Further, the gas guide groove 221 is provided with a flared section 221a with gradually increasing width at one end away from the axis of the valve core 2, which can not only make the gas fully expand at the outlet of the gas guide groove 221 to reduce the loss of thrust, but also avoid the formation of a sharp angle between the groove wall of the gas guide groove 221 and the edge of the flow guide part 22, thereby improving the safety of the pressure limiting valve.

[0049] Further, the bottom surface of the flow guide part 22 is provided with an annular gas collecting groove 222. The gas collecting groove 222 is located at one end of the gas guide groove 221 close to the axis of the valve core 2. Since the gas discharged by the exhaust pipe 1 is annular, the use of the annular gas collecting groove 222 can improve the gas collection efficiency and reduce the diffusion of the gas; each gas guide groove 221 is in communication with the gas collecting groove 222, so that the gas collected by the gas collecting groove 222 is redistributed to each gas guide groove 221, thereby increasing the amount of gas entering the gas guide groove 221 and the flow speed of the gas.

[0050] Furthermore, the valve core 2 also includes a rod 23, which is located below the sealing portion 21 and extends axially along the valve core 2. The rod 23 is disposed within the exhaust pipe 1. On the one hand, the rod 23 guides the valve core 2 within the exhaust pipe 1, improving the relative positioning accuracy of the valve core 2 and the exhaust pipe 1, ensuring that the valve core 2 can accurately close the exhaust hole. It also allows a portion of the valve core 2 to sink into the exhaust pipe 1, thereby reducing the external volume of the pressure-limiting valve, increasing the compactness of the overall structure of the pressure-limiting valve, and improving the appearance of the pressure cooker lid. On the other hand, the rod 23 forms an annular gap within the exhaust pipe 1, through which exhaust is discharged, acting as a filter to prevent obstructions such as food residue from entering the exhaust pipe 1, thereby reducing the risk of blockage. It is understood that in other embodiments, the valve core 2 may also be provided with a guide structure on the exterior of the exhaust pipe 1.

[0051] Furthermore, the outer surface of the stem 23 is provided with at least two ridges 231. These ridges 231 extend axially along the valve core 2 and are spaced circumferentially around the valve core 2, with an air vent gap 232 formed between adjacent ridges 231. On the one hand, the ridges 231 act as scrapers, effectively clearing obstructions during the rotation of the valve core 2. On the other hand, the air vent gap 232 reduces the circumferential contact area between the stem 23 and the exhaust pipe 1, thereby reducing the resistance to the movement of the valve core 2 within the exhaust pipe 1 and increasing the rotational speed of the valve core 2. It is understood that in other embodiments, the stem 23 can also be configured as a regular cylindrical structure.

[0052] Furthermore, the sealing portion 21, the flow guide portion 22, and the stem portion 23 are integrally formed, which can not only reduce processing errors and improve the precision of the valve core 2 itself, but also reduce the number of parts and reduce production costs. It is understood that in other embodiments, any of the sealing portion 21, the flow guide portion 22, and the stem portion 23 can be provided as separate components and connected to each other by means of threaded engagement or the like to form a whole.

[0053] Furthermore, the pressure-limiting valve includes a counterweight 3 connected to the valve core 2. The counterweight 3 and valve core 2 jointly limit the pressure within the pot, thereby reducing the volume and weight of the valve core 2. The counterweight 3 and valve core 2 can be connected to each other using a detachable method such as threaded engagement, or can be connected to each other using a non-detachable method such as welding or integral molding.

[0054] Further, the weight 3 is located below the exhaust pipe 1, and a gap is provided between the top surface of the weight 3 and the bottom surface of the exhaust pipe 1. The weight 3 is detachably connected to the rod portion 23 of the valve core 2. On the one hand, the weight 3 is located inside the cover body 6, thereby reducing the volume of the pressure limiting valve exposed outside the cover body 6, improving the structural compactness of the pressure cooker cover, and improving the appearance of the pressure cooker cover. On the other hand, the gap between the top surface of the weight 3 and the bottom surface of the exhaust pipe 1 can limit the axial movement of the valve core 2 along the exhaust pipe 1, preventing the valve core 2 from falling off the exhaust pipe 1. In addition, the weight 3 is detachably connected to the rod portion 23, which can facilitate the disassembly and cleaning of the pressure limiting valve.

[0055] Further, the top surface of the weight 3 is provided with an exhaust groove 31 opposite the rod portion 23. The exhaust groove 31 extends along the radial direction of the weight 3 and penetrates the edge of the weight 3. When the valve core 2 rises, the weight 3 and the exhaust pipe 1 are completely fitted to close the exhaust pipe 1, which affects the normal discharge of the gas. Specifically, when the valve core 2 rises and the top surface of the weight 3 and the bottom surface of the exhaust pipe 1 abut each other, the groove bottom of the exhaust groove 31 and the bottom surface of the exhaust pipe 1 are separated from each other. Gas can flow into the exhaust groove 31 through both ends of the exhaust groove 31 and be discharged by the exhaust pipe 1. In addition, the top surface of the weight 3 and the bottom surface of the exhaust pipe 1 abut each other through a flat surface with a large area, which can avoid damage such as indentation under the impact of high-pressure gas. Understandably, in other embodiments, a limiting structure such as a protrusion or a protruding strip 231 can be provided between the weight 3 and the exhaust pipe 1 to prevent the weight 3 from being completely fitted with the exhaust pipe 1.

[0056] Further, the weight 3 can be provided in a circular columnar structure with a large diameter and a small height to minimize the distance of the weight 3 extending downward, preventing the liquid or foam in the pot from contacting the weight 3, causing the weight 3 to be contaminated or the weight to change, etc. Understandably, in other embodiments, the weight 3 can also be provided in other shapes as needed, such as a conical or polygonal column, etc.

[0057] Further, the pressure limiting valve further comprises a liquid collector 4, which is sleeved on the outer periphery of the exhaust pipe 1. The liquid collector 4 is in a cavity structure with an opening upward. The lower part of the liquid collector 4 forms a mounting space for the cover body 6. That is, during use, the liquid collector 4 is stacked above the cover body 6, and the liquid collector 4 collects the liquid such as condensed water generated during the exhaust process, preventing the liquid from contaminating the pressure cooker cover or the cooking area, and improving the user experience.

[0058] Further, the pressure limiting valve further comprises a threaded fastener 5. The threaded fastener 5 is connected to the exhaust pipe 1 and presses the upper part of the liquid collector 4, thereby limiting the axial position of the liquid collector 4, preventing the liquid collector 4 from moving axially during use, causing the liquid collected in the liquid collector 4 to leak or spill.

[0059] In addition, embodiments of the present application further provide a pressure cooker lid, comprising a lid body 6 and any of the pressure-limiting valves provided in the embodiments of the present application. An exhaust pipe 1 of the pressure-limiting valve is disposed through the lid body 6, thereby enabling communication between the inside and outside of the lid body 6. The exhaust pipe 1 is connected and fixed to the lid body 6, thereby securing the pressure-limiting valve to the lid body 6.

[0060] In addition, an embodiment of the present application further provides a pressure cooker comprising a cooker body and any one of the pressure cooker lids provided herein. The pressure cooker lid is movably connected to the cooker body and can be sealed with the cooker body to generate high pressure in the cooker to meet the requirements of high-pressure cooking.

[0061] The above description is merely a preferred embodiment of the present application and is not intended to limit the present application. Various modifications and variations are possible for those skilled in the art. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present application shall be included within the scope of protection of the present application.

Claims

1. A pressure limiting valve, characterized in that: include: exhaust pipe (1); A valve core (2) comprising a sealing portion (21) and a flow guide portion (22) located above the exhaust pipe (1), wherein the sealing portion (21) is used to open or close the exhaust pipe (1), and the flow guide portion (22) surrounds the outer edge of the sealing portion (21); The bottom surface of the guide portion (22) is provided with at least two air guide grooves (221), the air guide grooves (221) extending in an arc along a direction away from the axis of the valve core (2), and the air guide grooves (221) are distributed in a ring array around the axis of the valve core (2).

2. The pressure limiting valve according to claim 1, characterized in that The valve core (2) further comprises a rod portion (23), the rod portion (23) being located below the sealing portion (21) and extending along the axial direction of the valve core (2), and the rod portion (23) being arranged through the exhaust pipe (1).

3. The pressure limiting valve according to claim 2, characterized in that The pressure limiting valve further comprises a counterweight (3), the counterweight (3) being located below the exhaust pipe (1), and the counterweight (3) being detachably connected to the rod (23).

4. The pressure limiting valve according to claim 3, characterized in that An exhaust groove (31) is provided on the top surface of the counterweight (3) facing the rod portion (23). The exhaust groove (31) extends along the radial direction of the counterweight (3) and passes through the edge of the counterweight (3).

5. The pressure limiting valve according to claim 2, characterized in that: The outer surface of the rod portion (23) is provided with at least two convex strips (231), the convex strips (231) extending along the axial direction of the valve core (2), the convex strips (231) being arranged at intervals in the circumferential direction around the valve core (2), and an exhaust gap (232) being formed between adjacent convex strips (231).

6. The pressure limiting valve according to claim 1, characterized in that The bottom surface of the guide portion (22) is provided with an annular air collecting groove (222), and the air collecting groove (222) is located at one end of the air guide groove (221) close to the axis of the valve core (2), and each of the air guide grooves (221) is interconnected with the air collecting groove (222).

7. The pressure limiting valve according to claim 1, characterized in that An end of the air guide groove (221) away from the axis of the valve core (2) is provided with a flared section (221a) with gradually increasing width.

8. The pressure limiting valve according to any one of claims 1 to 7, characterized in that: The pressure-limiting valve further comprises a liquid collecting member (4), the liquid collecting member (4) being sleeved on the outer periphery of the exhaust pipe (1), and the liquid collecting member (4) being a cavity-shaped structure with an opening facing upward.

9. A pressure cooker lid, characterized in that: It comprises a cover body and the pressure limiting valve according to any one of claims 1 to 8, wherein the exhaust pipe (1) is passed through the cover body, and the exhaust pipe (1) is connected and fixed to the cover body.

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.

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