A pressure limiting valve assembly and a cookware

Abstract

The present application relates to a pressure-limiting valve assembly and a cooking pot, which includes a valve body, an exhaust pipe, a valve core, an elastic member, and an adaptive expansion member capable of automatically adjusting its volume according to changes in external air pressure. The valve body includes a valve cavity, which is in communication with the outside. The exhaust pipe is fixed to the valve body, and the exhaust pipe is provided with an exhaust passage. The outlet of the exhaust passage is located in the valve cavity. The valve core is slidably arranged in the valve cavity, and the valve core is used to block or open the outlet. The elastic member is arranged between the valve core and the valve body. The adaptive expansion member abuts against the elastic member. The adaptive expansion member is used to adjust the compression amount of the elastic member through the change of its own volume, so as to adjust the pressure of the valve core blocking the outlet, change the pressure difference inside and outside the pot, and achieve the automatic pressure regulation effect of the pressure cooker according to changes in external atmospheric pressure. Therefore, the pressure cooker can be used in a plateau environment with a higher altitude and lower air pressure, can meet the usage requirements of users in various environments, and has a simple structure without the need to install control components for manual adjustment or electric adjustment.

Description

Technical Field

[0001] The present application relates to the technical field of cooking utensils, and particularly relates to a pressure limiting valve assembly and a cooking pot. Background Art

[0002] A pressure cooker, also known as a pressure pot or pressure cooker, is a kitchen utensil. The pressure cooker relies on the physical phenomenon that the boiling point of a liquid increases under higher air pressure. By increasing the air pressure inside a closed container space, the cooking temperature is raised, achieving the effect of completing cooking in a short time. However, when used in high-altitude areas, due to the large difference in local atmospheric pressure from that at sea level, the pressure cooker cannot reach the designed working temperature during cooking, which affects the performance of the pressure cooker. The cooking effect cannot meet the design goal, cannot meet the user's usage requirements, and reduces the user's experience. Summary of the Invention

[0003] The present application provides a pressure limiting valve assembly and a cooking pot to solve the problem that the temperature inside the pressure cooker cannot reach the temperature during normal operation on the plain when the pressure cooker is used in high-altitude areas in the above-mentioned prior art.

[0004] In a first aspect of the present application, a pressure limiting valve assembly is provided, including a valve body, an exhaust pipe, a valve core, an elastic member, and an adaptive expansion member capable of automatically adjusting its volume according to changes in external air pressure. The valve body includes a valve cavity that communicates with the outside. The exhaust pipe is fixed to the valve body, and the exhaust pipe is provided with an exhaust passage. The outlet of the exhaust passage is located in the valve cavity. The valve core is slidably disposed in the valve cavity, and the valve core is used to block or open the outlet. The elastic member is disposed between the valve core and the valve body, and the adaptive expansion member abuts against the elastic member. The adaptive expansion member is used to adjust the compression amount of the elastic member by changing its own volume, so as to adjust the pressure at which the valve core blocks the outlet.

[0005] The pressure limiting valve assembly in the present application can automatically adjust the compression amount of the elastic member according to changes in external air pressure, thereby adjusting the pressure at which the valve core blocks the outlet, changing the pressure difference between the inside and outside of the pot, and achieving the effect of automatically adjusting the pressure of the pressure cooker according to changes in external atmospheric pressure. This enables the working pressure and working temperature of the pressure cooker to be maintained in a stable state, avoiding the risk of a decrease in the working pressure and working temperature inside the pot due to the constant pressure difference between the inside and outside of the pot in a low-air-pressure environment. As a result, the pressure cooker can be used in a high-altitude environment with a higher altitude and lower air pressure, expanding the environmental usage range of the pressure cooker, meeting the user's usage requirements in various environments, improving the user's experience, and having the advantages of simple structure, convenient use, and low cost without the need to install control components for manual or electric adjustment.

[0006] In a possible design, the adaptive expansion member is provided with a deformation cavity for encapsulating air. When there is a pressure difference between the air pressure in the deformation cavity and the external air pressure, the deformation cavity can expand or contract.

[0007] The deformation cavity of the adaptive expansion member is a sealed cavity, and the air inside the deformation cavity is a fixed quantity. When there is a pressure difference between the air pressure in the deformation cavity and the external air pressure, in order to keep the air pressure inside and outside the deformation cavity balanced, the deformation cavity will automatically expand or contract under the action of pressure, so that the air pressure in the deformation cavity decreases or increases, and the volume of the adaptive expansion member will also increase or decrease accordingly. Thus, the volume of the adaptive expansion member can be automatically adjusted according to the change of the external air pressure, and then the compression amount of the elastic member can be automatically adjusted, realizing the automatic pressure regulation effect of the pressure limiting valve assembly according to the external atmospheric pressure.

[0008] In a possible design, the adaptive expansion member is in a ring structure, and the adaptive expansion member is sleeved on the valve core.

[0009] This structural design can limit the displacement of the adaptive expansion member in the radial direction in the valve cavity, keep the relative positional relationship between the adaptive expansion member, the valve core and the elastic member stable, ensure that the adaptive expansion member can cooperate with the valve core and the elastic member, thus ensuring the normal operation of the pressure limiting valve assembly, improving the structural stability of the pressure limiting valve assembly, and the structure is simple, easy to assemble, convenient for mass production, can improve production efficiency and reduce manufacturing costs.

[0010] In a possible design, the material of the adaptive expansion member is silica gel or silicone rubber.

[0011] Food-grade silica gel or silicone rubber both have good high-temperature resistance, stable chemical properties, will not produce toxic gases or substances, are not easy to damage and age, have low costs, and can still maintain good elasticity at high temperatures. It can ensure that the volume of the adaptive expansion member remains stable during the use of the pressure cooker, thus keeping the pressure difference between the inside and outside of the pot stable, ensuring the working pressure and working temperature of the pressure cooker are stable, preventing the volume change of the adaptive expansion member during cooking, resulting in an increase in the working pressure of the pressure cooker and causing excessive pressure inside the pot to be dangerous or a decrease in the working pressure affecting the cooking effect, and improving the user experience.

[0012] In a possible design, the adaptive expansion member is arranged between the elastic member and the valve core. One end of the elastic member abuts against the adaptive expansion member, and the other end abuts against the valve body. Wherein, the adaptive expansion member adjusts the compression amount of the elastic member between the valve body and the adaptive expansion member through the change of its volume along the movement direction of the valve core.

[0013] This structure can facilitate the mutual coordination among the adaptive expansion member, the valve core and the elastic member, facilitate the adjustment of the elastic member by the adaptive expansion member, and facilitate the elastic member to apply force to the valve core, which can improve the adjustment accuracy of the pressure limiting valve assembly. The structure is simple, easy to assemble, and easy to mass produce, which can improve production efficiency and reduce manufacturing costs.

[0014] In a possible design, the valve body includes an upper shell and a lower shell, the upper shell is connected to the lower shell via a connecting piece, and the valve cavity is enclosed between the upper shell and the lower shell.

[0015] The upper shell and the lower shell can provide installation space for the components in the valve cavity, and can provide protection for the components in the valve cavity such as the exhaust pipe, valve core, elastic parts and adaptive expansion parts, thereby avoiding the exhaust pipe, valve core, elastic parts and adaptive expansion parts and other components being exposed to the outside and causing wear, and can prevent the components in the valve cavity from detaching from the valve body during use and causing the loss of components, thereby increasing the service life of the pressure limiting valve assembly and being able to improve the appearance of the pressure limiting valve assembly.

[0016] In a possible design, the valve body also includes an upper valve sleeve and a lower valve sleeve, and the lower valve sleeve is connected to the lower shell body; one end of the upper valve sleeve abuts against the upper shell body, and the other end is threadedly connected to the lower valve sleeve, a sliding cavity is formed between the upper valve sleeve and the lower valve sleeve, the sliding cavity is connected to the valve cavity, and the valve core is movably arranged in the sliding cavity, one end of the elastic member abuts against the upper valve sleeve, the other end of the elastic member abuts against one end of the adaptive expansion member, and the other end of the adaptive expansion member abuts against the valve core.

[0017] This structure can keep the positions of the upper valve sleeve and the lower valve sleeve fixed in the valve cavity, thereby keeping the position of the sliding cavity fixed, preventing the upper valve sleeve and the lower valve sleeve from shaking and interfering with the sliding effect of the valve core, elastic part and adaptive expansion part in the sliding cavity, hindering the discharge of gas in the pot and causing safety hazards in use, thereby improving the safety of use of the pressure limiting valve assembly. The valve core, elastic part and adaptive expansion part are arranged in the sliding cavity, which can reduce the space occupied by the valve core, elastic part and adaptive expansion part, thereby reducing the volume of the pressure limiting valve assembly and reducing the complexity of the structure. The sliding cavity can also limit the movement of the valve core, elastic part and adaptive expansion part in the direction away from the exhaust pipe, preventing the elastic part and adaptive expansion part from detaching from the valve core, and preventing the valve core from detaching from the exhaust pipe, thereby further improving the structural stability of the pressure limiting valve assembly.

[0018] In a possible design, the valve core is provided with an outer flange, the outer flange is slidably connected to the inner wall of the upper valve sleeve, and one end of the adaptive expansion member facing away from the elastic member abuts against the outer flange.

[0019] The design of the turned-out edge provides an installation space for the self-adaptive expansion member and the elastic member in the sliding cavity, further reducing the occupied space of the self-adaptive expansion member, the elastic member and the valve core. At the same time, the turned-out edge can slide along the inner wall of the valve sleeve, which can play a guiding role in the movement of the valve core, prevent the valve core from tilting during sliding and interfering with the sliding of the valve core in the sliding cavity, and improve the sliding stability of the valve core in the sliding cavity.

[0020] In a possible design, the valve body further includes a valve seat, the valve seat is fixed to the lower housing, and the exhaust pipe is threadedly connected to the valve seat.

[0021] This structure can fix the exhaust pipe on the valve body, prevent the exhaust pipe from shaking on the valve body and interfering with the sliding of the valve core, and prevent the exhaust pipe from detaching from the valve body, further improving the structural stability of the pressure-limiting valve assembly. At the same time, the exhaust pipe and the valve seat are threadedly connected, with a simple structure, stable connection, convenient disassembly and assembly, and low cost.

[0022] The second aspect of the present application provides a cookware, which includes a pot lid and the above-mentioned pressure-limiting valve assembly, and the pressure-limiting valve assembly is installed on the pot lid through the exhaust pipe.

[0023] Since the pressure-limiting valve assembly has the above technical effects, the cookware including the pressure-limiting valve assembly should also have corresponding technical effects, which will not be elaborated here.

[0024] Among them, the exhaust pipe can be fixed to the pot lid by a nut, with a simple structure, convenient disassembly and assembly of the pressure-limiting valve assembly, thus facilitating cleaning and replacement. It can also be fixed to the pot lid by other means, which is not limited here.

[0025] It should be understood that the above general description and the following detailed description are only exemplary and cannot limit the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 is a schematic structural diagram of the pressure-limiting valve assembly provided by the present application in one embodiment;

[0027] Figure 2 is Figure 1 the schematic structural diagram when the air outlet is opened in;

[0028] Figure 3 is a schematic structural diagram of the pressure-limiting valve assembly provided by the present application in another embodiment;

[0029] Figure 4 is Figure 3 the schematic structural diagram when the air outlet is opened in.

[0030] Reference numerals:

[0031] 1 - Valve body;

[0032] 11 - Upper housing;

[0033] 12 - Lower housing;

[0034] 13 - Upper valve sleeve;

[0035] 14 - Lower valve sleeve;

[0036] 15 - Valve seat;

[0037] 16 - Valve cavity;

[0038] 17 - Sliding cavity;

[0039] 2 - Exhaust pipe;

[0040] 21 - Exhaust passage;

[0041] 211 - Air outlet;

[0042] 3 - Valve core;

[0043] 31 - Outer turned - up edge;

[0044] 4 - Elastic member;

[0045] 5 - Adaptive expansion member;

[0046] 51 - Deformation cavity;

[0047] 6 - Connecting member.

[0048] The accompanying drawings here are incorporated into and constitute a part of this specification, showing embodiments consistent with the present application, and are used together with the specification to explain the principles of the present application. Detailed implementation manners

[0049] For a better understanding of the technical solutions of the present application, the embodiments of the present application will be described in detail below with reference to the accompanying drawings.

[0050] It should be clear that the described embodiments are only a part of the embodiments of the present application, rather than all of the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments in the present application without creative efforts belong to the scope protected by the present application.

[0051] The terms used in the embodiments of the present application are only for the purpose of describing specific embodiments, and are not intended to limit the present application. The singular forms of "a", "the" and "said" used in the embodiments of the present application and the appended claims are also intended to include the plural forms unless the context clearly indicates otherwise.

[0052] It should be understood that the term "and / or" used herein is merely a description of the association relationship of associated objects, indicating that three relationships may exist. For example, A and / or B may represent three situations: A exists alone, A and B exist simultaneously, and B exists alone. Additionally, the character " / " in this text generally indicates that the associated objects before and after are in an "or" relationship.

[0053] It should be noted that the orientation terms such as "upper", "lower", "left", and "right" described in the embodiments of this application are described from the angle shown in the drawings and should not be construed as a limitation on the embodiments of this application. In addition, in the context, it should also be understood that when it is mentioned that a component is connected "above" or "below" another component, it can not only be directly connected "above" or "below" another component, but also be indirectly connected "above" or "below" another component through an intermediate component.

[0054] This application provides a pressure limiting valve assembly, as Figures 1 to 4 shown, including a valve body 1, an exhaust pipe 2, a valve core 3, an elastic member 4, and an adaptive expansion member 5 that can automatically adjust its volume according to changes in the external air pressure. The valve body 1 includes a valve cavity 16, and the valve cavity 16 communicates with the outside. The exhaust pipe 2 is fixed to the valve body 1, and the exhaust pipe 2 is provided with an exhaust passage 21. The air outlet 211 of the exhaust passage 21 is located in the valve cavity 16. The valve core 3 is slidably arranged in the valve cavity 16, and the valve core 3 is used to block or open the air outlet 211. The elastic member 4 is arranged between the valve core 3 and the valve body 1. The adaptive expansion member 5 abuts against the elastic member 4, and the adaptive expansion member 5 is used to adjust the compression amount of the elastic member 4 by changing its own volume, so as to adjust the pressure of the valve core 3 blocking the air outlet 211.

[0055] During the use of the pressure cooker, the air inside the pot expands when heated, and the gas inside the pot can enter the exhaust passage 21. And when the pressure inside the pot is greater than the external atmospheric pressure, the gas inside the pot has a tendency to leak out of the pot under the action of the pressure inside the pot. However, since the pressure inside the pressure cooker is less than the working pressure at this time, that is, the pressure difference between the inside and outside of the pot is less than the gravity of the valve core 3 and the elastic force of the elastic member 4, as Figure 1 and Figure 3 shown, the valve core 3 can block the air outlet 211 of the exhaust passage 21 under the action of its own gravity and the elastic force of the elastic member 4, improving the sealing performance of the internal environment of the pot and enabling the pressure inside the pot to continue to rise. When the pressure inside the pressure cooker is greater than the working pressure, that is, when the pressure difference between the inside and outside of the pot is greater than the gravity of the valve core 3 and the elastic force of the elastic member 4, as Figure 2 and Figure 4As shown, the gas inside the pot can push the valve core 3 through the exhaust passage 21, overcoming the gravity of the valve core 3 and the elastic force of the elastic member 4 to do work, so that the elastic member 4 is compressed between the valve core 3 and the valve body 1. The valve core 3 slides in the direction away from the exhaust pipe 2, opening the air outlet 211. The gas inside the pot can flow into the valve cavity 16 through the air outlet 211, so that the excess medium can be discharged to the outside, avoiding excessive pressure inside the pressure cooker and ensuring the safe use of the pressure cooker.

[0056] In this embodiment, when the pressure cooker is in a plain area at 0 altitude, the atmospheric pressure is the standard atmospheric pressure. The adaptive expansion member 5 has an initial state as shown in Figure 1 and Figure 2 . At this time, the volume of the adaptive expansion member 5 is small, the compression amount of the elastic member 4 is small, the elastic force generated by the elastic member 4 is small, the acting force of the elastic member 4 on the valve core 3 is small, and the pressure difference between the inside and outside of the pot during the exhaust of the pressure cooker is small. When the pressure cooker is used in a plateau area at a higher altitude, the atmospheric pressure decreases. At this time, the volume of the adaptive expansion member 5 can automatically increase as the external atmospheric pressure decreases, and gradually be in an expanded state as shown in Figure 3 and Figure 4 . The compression amount of the elastic member 4 will also increase as its own volume increases, making the elastic force generated by the elastic member 4 increase, the acting force of the elastic member 4 on the valve core 3 increase, so that the pressure for the valve core 3 to block the air outlet 211 increases, and thus the pressure difference between the inside and outside of the pot during the exhaust of the pressure cooker increases, which can increase the working pressure of the pressure cooker when used in a plateau area and increase the working temperature inside the pot. Therefore, the pressure limiting valve assembly in this application can automatically adjust the compression amount of the elastic member 4 according to the change of the external air pressure, thereby adjusting the pressure for the valve core 3 to block the air outlet 211, changing the pressure difference between the inside and outside of the pot, realizing the automatic pressure regulation effect of the pressure cooker according to the change of the external atmospheric pressure, keeping the working pressure and working temperature of the pressure cooker in a stable state, avoiding the risk of the working pressure and working temperature inside the pot decreasing due to the unchanged pressure difference between the inside and outside of the pot when used in a low-pressure environment. Thus, the pressure cooker can be used in a plateau environment with a higher altitude and a lower air pressure, improving the environmental use range of the pressure cooker, meeting the use requirements of users in various environments, improving the user experience, and without the need to install control components for manual adjustment or electric adjustment, having the advantages of simple structure, convenient use, and low cost.

[0057] Among them, in a specific embodiment as shown in Figures 1 to 4 , the elastic member 4 is a spring. The elastic member 4 is sleeved on the valve core 3, which can prevent the elastic member 4 from detaching from the valve core 3 during deformation, resulting in damage to the pressure limiting valve assembly, and improving the structural stability of the pressure limiting valve assembly. Of course, the elastic member 4 can also be an elastic glue or other components, which is not limited here.

[0058] In addition, the pressure limiting valve assembly is installed on the pot lid through the exhaust pipe 2. Specifically, it can be fixed by nuts, with a simple structure, facilitating the disassembly and assembly of the pressure limiting valve assembly, thus facilitating cleaning and replacement. It can also be fixed to the pot lid by other means, which is not restricted herein.

[0059] In a specific embodiment, as Figures 1 to 4 shown, the adaptive expansion member 5 is provided with a deformation cavity 51 for encapsulating air. When there is a pressure difference between the air pressure in the deformation cavity 51 and the external air pressure, the deformation cavity 51 can expand or contract.

[0060] In this embodiment, the deformation cavity 51 of the adaptive expansion member 5 is a sealed cavity, and the air inside the deformation cavity is of a fixed quantity. When there is a pressure difference between the air pressure in the deformation cavity 51 and the external air pressure, in order to keep the air pressure inside and outside the deformation cavity 51 balanced, the deformation cavity 51 will automatically expand or contract under the action of pressure, so that the air pressure in the deformation cavity 51 decreases or increases, and the volume of the adaptive expansion member 5 will correspondingly increase or decrease. Thus, the volume of the adaptive expansion member 5 can be automatically adjusted according to the change of the external air pressure, and thus the compression amount of the elastic member 4 can be automatically adjusted, achieving the effect that the pressure limiting valve assembly automatically adjusts the pressure according to the external atmospheric pressure.

[0061] At the same time, under the action of the pressure inside and outside the deformation cavity 51, the volume of the adaptive expansion member 5 can remain stable under the current atmospheric pressure, so that the compression amount of the elastic member 4 by the adaptive expansion member 5 remains unchanged, so that the pressure of the valve core 3 on the air outlet 211 remains constant, keeping the pressure difference between the inside and outside of the pot in a constant state, keeping the working pressure and working temperature of the pressure cooker stable, improving the structural stability of the pressure limiting valve assembly, and ensuring the use safety of the pressure cooker.

[0062] Among them, when the external atmospheric pressure is lower than the air pressure in the deformation cavity 51, for example, when the pressure cooker moves from a plain area to a plateau area, the gas in the deformation cavity 51 exerts pressure on the cavity wall of the adaptive expansion member 5, causing the deformation cavity 51 to expand, so that the volume of the adaptive expansion member 5 correspondingly increases, being in the expanded state as shown in Figure 3 and Figure 4 shown. At this time, the air pressure in the deformation cavity 51 decreases, and the air pressure inside and outside the deformation cavity 51 is balanced, and the volume of the adaptive expansion member 5 remains stable.

[0063] When the external atmospheric pressure is higher than the air pressure in the deformation cavity 51, for example, when the pressure cooker moves from a plateau area to a plain area, the external gas exerts pressure on the outer wall of the adaptive expansion member 5, causing the deformation cavity 51 to contract, so that the volume of the adaptive expansion member 5 correspondingly decreases, contracting to the state as shown in Figure 1 and Figure 2The initial state shown, at this time, the air pressure in the deformation cavity 51 increases, the air pressure inside and outside the deformation cavity 51 is balanced, and the volume of the adaptive expansion member 5 remains stable.

[0064] In addition, the cross-sectional shape of the deformation cavity 51 can be, for example, Figure 1 and Figure 2 the hourglass shape shown in Figure 3 and Figure 4 the square shape shown in

[0065] In a specific embodiment, the adaptive expansion member 5 is of an annular structure, and the adaptive expansion member 5 is sleeved on the valve core 3.

[0066] In this embodiment, this structural design can limit the displacement of the adaptive expansion member 5 in the radial direction within the valve cavity 16, so that the relative positional relationship between the adaptive expansion member 5, the valve core 3, and the elastic member 4 remains stable, ensuring that the adaptive expansion member 5, the valve core 3, and the elastic member 4 can cooperate with each other, thereby ensuring that the pressure limiting valve assembly can work properly, improving the structural stability of the pressure limiting valve assembly, and this structure is simple, easy to assemble, convenient for mass production, can improve production efficiency, and reduce manufacturing costs.

[0067] In another embodiment, the adaptive expansion member 5 can also be a structure in which multiple independent expansion members with sealed deformation cavities are arranged at intervals, or other structures that can automatically adjust their own volume according to the external atmospheric pressure, which are not limited here.

[0068] In a specific embodiment, the material of the adaptive expansion member 5 is silica gel or silicone rubber.

[0069] In this embodiment, food-grade silica gel or silicone rubber both have good high-temperature resistance, stable chemical properties, will not produce toxic gases or substances, are not easily damaged and aged, have low costs, and can also maintain good elasticity at high temperatures, ensuring that the volume of the adaptive expansion member 5 remains stable during the use of the pressure cooker, thereby maintaining the stability of the pressure difference inside and outside the pot, ensuring the stability of the working pressure and working temperature of the pressure cooker, preventing the volume change of the adaptive expansion member 5 during cooking, resulting in an increase in the working pressure of the pressure cooker and causing excessive pressure inside the pot to be dangerous or a decrease in the working pressure affecting the cooking effect, and improving the user experience.

[0070] Of course, the material of the adaptive expansion member 5 can also be other food-grade elastic materials with good high-temperature resistance, which are not limited here.

[0071] In a specific embodiment, as Figures 1 to 4As shown, the adaptive expansion member 5 is disposed between the elastic member 4 and the valve core 3. One end of the elastic member 4 abuts against the adaptive expansion member 5, and the other end abuts against the valve body 1. Among them, the adaptive expansion member 5 adjusts the compression amount of the elastic member 4 between the valve body 1 and the adaptive expansion member 5 by changing its own volume along the movement direction of the valve core 3.

[0072] In this embodiment, this structure can facilitate the mutual cooperation among the adaptive expansion member 5, the valve core 3, and the elastic member 4, facilitate the adjustment of the elastic member 4 by the adaptive expansion member 5, and facilitate the elastic member 4 to apply a force to the valve core 3. It can improve the adjustment accuracy of the pressure limiting valve assembly, and has a simple structure, is easy to assemble, is convenient for mass production, can improve production efficiency, and reduce manufacturing costs.

[0073] In another embodiment, the elastic member 4 can also be disposed between the adaptive expansion member 5 and the valve core 3. One end of the elastic member 4 abuts against the adaptive expansion member 5, and the other end abuts against the valve core 3. Among them, the adaptive expansion member 5 adjusts the compression amount of the elastic member 4 between the valve core 3 and the adaptive expansion member 5 by changing its own volume along the movement direction of the valve core 3, which is not limited here.

[0074] In a specific embodiment, as Figures 1 to 4 shown, the valve body 1 includes an upper housing 11 and a lower housing 12. The upper housing 11 and the lower housing 12 are connected by a connecting member 6, and a valve chamber 16 is formed between the upper housing 11 and the lower housing 12.

[0075] In this embodiment, the upper housing 11 and the lower housing 12 can provide an installation space for the components in the valve chamber 16, and can provide a protection function for the components such as the exhaust pipe 2, the valve core 3, the elastic member 4, and the adaptive expansion member 5 in the valve chamber 16, avoiding the wear caused by the exposure of the exhaust pipe 2, the valve core 3, the elastic member 4, and the adaptive expansion member 5, etc. It can prevent the components in the valve chamber 16 from detaching from the valve body 1 during use and causing the loss of components, improve the service life of the pressure limiting valve assembly, and can improve the appearance effect of the pressure limiting valve assembly.

[0076] In a specific embodiment, as Figures 1 to 4 shown, the valve body 1 further includes an upper valve sleeve 13 and a lower valve sleeve 14. The lower valve sleeve 14 is connected to the lower housing 12; one end of the upper valve sleeve 13 abuts against the upper housing 11, and the other end is threadedly connected to the lower valve sleeve 14. A sliding chamber 17 is formed between the upper valve sleeve 13 and the lower valve sleeve 14. The sliding chamber 17 is communicated with the valve chamber 16. The valve core 3 is movably disposed in the sliding chamber 17. One end of the elastic member 4 abuts against the upper valve sleeve 13, the other end of the elastic member 4 abuts against one end of the adaptive expansion member 5, and the other end of the adaptive expansion member 5 abuts against the valve core 3.

[0077] In this embodiment, this structure can keep the positions of the upper valve sleeve 13 and the lower valve sleeve 14 fixed within the valve cavity 16, so that the position of the sliding cavity 17 is kept fixed, preventing the upper valve sleeve 13 and the lower valve sleeve 14 from shaking and interfering with the sliding effect of the valve core 3, the elastic member 4 and the adaptive expansion member 5 within the sliding cavity 17, hindering the discharge of the gas in the pot and creating potential safety hazards in use, improving the safety in use of the pressure limiting valve assembly. Moreover, the valve core 3, the elastic member 4 and the adaptive expansion member 5 are arranged within the sliding cavity 17, which can reduce the space occupied by the valve core 3, the elastic member 4 and the adaptive expansion member 5, thereby reducing the volume of the pressure limiting valve assembly and the complexity of the structure. The sliding cavity 17 can also limit the movement of the valve core 3, the elastic member 4 and the adaptive expansion member 5 in the direction away from the exhaust pipe 2, preventing the elastic member 4 and the adaptive expansion member 5 from detaching from the valve core 3, and preventing the valve core 3 from detaching from the exhaust pipe 2, further improving the structural stability of the pressure limiting valve assembly.

[0078] In a specific embodiment, as Figures 1 to 4 shown, the valve core 3 is provided with an outward turned edge 31, and the outward turned edge 31 is slidably connected to the inner wall of the upper valve sleeve 13. One end of the adaptive expansion member 5 facing away from the elastic member 4 abuts against the outward turned edge 31.

[0079] In this embodiment, the design of the outward turned edge 31 provides an installation space for the adaptive expansion member 5 and the elastic member 4 within the sliding cavity 17, further reducing the occupied space of the adaptive expansion member 5, the elastic member 4 and the valve core 3, and can provide for the adaptive expansion member 5 and the elastic member 4. At the same time, the outward turned edge 31 slides along the inner wall of the upper valve sleeve 13, which can play a guiding role in the movement of the valve core 3, preventing the valve core 3 from tilting during sliding and interfering with the sliding of the valve core 3 within the sliding cavity 17, and improving the sliding stability of the valve core 3 within the sliding cavity 17.

[0080] In a specific embodiment, as Figures 1 to 4 shown, the valve body 1 further includes a valve seat 15. The valve seat 15 is fixed to the lower housing 12, and the exhaust pipe 2 is threadedly connected to the valve seat 15.

[0081] In this embodiment, this structure can fix the exhaust pipe 2 on the valve body 1, preventing the exhaust pipe 2 from shaking on the valve body 1 and interfering with the sliding of the valve core 3, and can prevent the exhaust pipe 2 from detaching from the valve body 1, further improving the structural stability of the pressure limiting valve assembly. At the same time, the exhaust pipe 2 and the valve seat 15 are threadedly connected, with a simple structure, stable connection, convenient disassembly and low cost.

[0082] This application also provides a cookware, as Figures 1 to 4 shown. The cookware includes a pot lid and the pressure limiting valve assembly according to any one of claims 1 to 9. The pressure limiting valve assembly is installed on the pot lid through the exhaust pipe 2. Since the pressure limiting valve assembly has the above technical effects, the cookware including this pressure limiting valve assembly should also have corresponding technical effects, which will not be elaborated here.

[0083] Among them, the exhaust pipe 2 can be installed on the pot lid and fixed by nuts. The structure is simple, which is convenient for the disassembly and assembly of the pressure limiting valve assembly, thus facilitating cleaning and replacement. It can also be fixed to the pot lid by other means, which is not limited here.

[0084] The above are only the preferred embodiments of the present application and are not used to limit the present application. For those skilled in the art, various changes and modifications can be made to the present application. 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 pressure limiting valve assembly, characterized in that, Comprising: A valve body (1), the valve body (1) includes a valve cavity (16), and the valve cavity (16) communicates with the outside; An exhaust pipe (2), the exhaust pipe (2) is fixed to the valve body (1), the exhaust pipe (2) is provided with an exhaust passage (21), and an air outlet (211) of the exhaust passage (21) is located in the valve cavity (16); A valve core (3), the valve core (3) is slidably arranged in the valve cavity (16), and the valve core (3) is used to block or open the air outlet (211); An elastic member (4), the elastic member (4) is arranged between the valve core (3) and the valve body (1); An adaptive expansion member (5) capable of automatically adjusting its volume according to changes in external air pressure, the adaptive expansion member (5) abuts against the elastic member (4), and the adaptive expansion member (5) is used to adjust the compression amount of the elastic member (4) through changes in its own volume, so as to adjust the pressure of the valve core (3) blocking the air outlet (211).

2. The pressure-limiting valve assembly according to claim 1, characterized in that, The adaptive expansion member (5) is provided with a deformation cavity (51) for encapsulating air. When there is an air pressure difference between the air pressure in the deformation cavity (51) and the external air pressure, the deformation cavity (51) can expand or contract.

3. The pressure limiting valve assembly according to claim 1, characterized in that, The adaptive expansion member (5) is of an annular structure, and the adaptive expansion member (5) is sleeved on the valve core (3).

4. The pressure-limiting valve assembly according to claim 1, characterized in that The material of the adaptive expansion member (5) is silica gel or silicone rubber.

5. The pressure-limiting valve assembly according to claim 1, characterized in that, The adaptive expansion member (5) is arranged between the elastic member (4) and the valve core (3); One end of the elastic member (4) abuts against the adaptive expansion member (5), and the other end abuts against the valve body (1); Wherein, the adaptive expansion member (5) adjusts the compression amount of the elastic member (4) between the valve body (1) and the adaptive expansion member (5) through changes in its volume along the movement direction of the valve core (3).

6. The pressure-limiting valve assembly according to any one of claims 1 to 5, characterized in that, The valve body (1) includes an upper housing (11) and a lower housing (12), the upper housing (11) and the lower housing (12) are connected by a connecting member (6), and the valve cavity (16) is formed between the upper housing (11) and the lower housing (12).

7. The pressure limiting valve assembly according to claim 6, wherein, The valve body (1) further includes an upper valve sleeve (13) and a lower valve sleeve (14), the lower valve sleeve (14) is connected to the lower housing (12); one end of the upper valve sleeve (13) abuts against the upper housing (11), and the other end is threadedly connected to the lower valve sleeve (14). A sliding cavity (17) is formed between the upper valve sleeve (13) and the lower valve sleeve (14), and the sliding cavity (17) communicates with the valve cavity (16); The valve core (3) is movably arranged in the sliding cavity (17); One end of the elastic member (4) abuts against the upper valve sleeve (13), the other end of the elastic member (4) abuts against one end of the adaptive expansion member (5), and the other end of the adaptive expansion member (5) abuts against the valve core (3).

8. The pressure limiting valve assembly according to claim 7, characterized in that, The valve core (3) is provided with an outward turning edge (31), and the outward turning edge (31) is slidably connected to the inner wall of the upper valve sleeve (13); One end of the adaptive expansion member (5) facing away from the elastic member (4) abuts against the outwardly turned edge (31).

9. The pressure-limiting valve assembly according to claim 6, wherein The valve body (1) further includes a valve seat (15), the valve seat (15) is fixed to the lower housing (12), and the exhaust pipe (2) is threadedly connected to the valve seat (15).

10. A cookware, characterized in that, The cookware includes a pot lid and the pressure limiting valve assembly according to any one of claims 1 to 9, and the pressure limiting valve assembly is installed on the pot lid through the exhaust pipe (2).

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