Pressure limiting valve and cooking container

Abstract

The pressure limiting valve comprises a valve body, an exhaust pipe and a valve element, the valve body is provided with a valve cavity communicated with the outside, the valve cavity is provided with a first opening and a second opening which are oppositely arranged in the height direction of the pressure limiting valve, and the exhaust pipe is detachably connected with the valve body; the valve body is provided with an air inlet and an air outlet which are oppositely formed in the height direction of the pressure limiting valve, the exhaust pipe comprises a first end, the air outlet is formed in the first end, the first end can stretch into the valve cavity through the first opening or the second opening, and the valve element is located in the valve cavity and can move in the height direction of the pressure limiting valve relative to the valve body; a first sealing part and a second sealing part are arranged at the two ends, in the height direction of the pressure limiting valve, of the valve element correspondingly, and the first sealing part and the second sealing part are used for being in sealing fit with the first end so as to block the air outlet. The stress area of the first sealing part can be different from the stress area of the second sealing part, so that the cooking container has different exhaust pressures, and the applicability of the cooking container is improved.

Description

Technical Field

[0001] This application relates to the technical field of cooking containers, and particularly to a pressure limiting valve and a cooking container. Background Art

[0002] A pressure cooker is a cooking container commonly used in people's daily lives. When the pressure cooker is heated, steam is generated inside. The increasing steam makes the pressure inside the pressure cooker gradually increase, facilitating the rapid cooking of food. To ensure the safe use of the pressure cooker, a pressure limiting valve is usually provided on the container lid of the pressure cooker. When the pressure inside the pressure cooker is too high, some of the steam in the pressure cooker can be discharged to the outside through the pressure limiting valve to achieve pressure relief. However, the pressure range usually limited by the pressure limiting valve is a single value, making it impossible for the pressure cooker to preset different pressure values according to different ingredients, affecting the applicability of the pressure cooker. Summary of the Utility Model

[0003] In view of this, this application provides a pressure limiting valve and a cooking container to solve the technical problem of the low applicability of the pressure limiting valve in the prior art.

[0004] In a first aspect, an embodiment of this application provides a pressure limiting valve, which includes: a valve body having a valve cavity communicating with the outside, the valve cavity having a first opening and a second opening oppositely arranged along the height direction of the pressure limiting valve; an exhaust pipe detachably connected to the valve body, the exhaust pipe having an air inlet and an air outlet oppositely arranged along the height direction of the pressure limiting valve, the exhaust pipe including a first end along the height direction of the pressure limiting valve, the air outlet being arranged at the first end, and the first end being able to extend into the valve cavity through the first opening or the second opening; a valve core located in the valve cavity; wherein, the valve core can move relative to the valve body along the height direction of the pressure limiting valve, and both ends of the valve core along the height direction of the pressure limiting valve are respectively provided with a first sealing portion and a second sealing portion, and the first sealing portion and the second sealing portion are used for sealing cooperation with the first end to block the air outlet.

[0005] In this embodiment, the force-bearing area of the first sealing portion can be different from that of the second sealing portion. Therefore, when the weights of the valve body, the valve core, and other components installed on the valve body are certain, the steam pressure required to lift the first sealing portion and the steam pressure required to lift the second sealing portion are different, that is, the first exhaust pressure when the cooking container exhausts in the first state of the pressure limiting valve and the second exhaust pressure when the cooking container exhausts in the second state of the pressure limiting valve are different, so that the user can adjust the pressure limiting valve to be in the first state or the second state according to needs, and further enable the cooking container to have different exhaust pressures, improving the applicability of the cooking container.

[0006] In a specific embodiment, the valve core is in sliding fit with the inner wall of the valve body.

[0007] In this embodiment, making the valve core in sliding fit with the inner wall of the valve body facilitates the movement of the valve core relative to the valve body along the height direction of the pressure limiting valve, thereby facilitating the switching between the cooperation of the first end with the first sealing portion or the second sealing portion, and further switching the cooking container to have a first exhaust pressure or a second exhaust pressure.

[0008] In a specific embodiment, the first sealing portion is a recessed portion, and the inner peripheral wall of the first sealing portion is used for sealing cooperation with the outer peripheral wall of the first end; the second sealing portion is a protruding portion, and the outer peripheral wall of the second sealing portion is used for sealing cooperation with the inner peripheral wall of the first end.

[0009] In this embodiment, making the first sealing portion a recessed portion enables the inner peripheral wall of the first sealing portion to abut against the outer peripheral wall of the first end, thereby achieving sealing cooperation, and enabling the contact area between the first sealing portion and the first end to be relatively large after they abut, and the force-bearing area of the first sealing portion to be relatively large. At the same time, making the second sealing portion a protruding portion enables the outer peripheral wall of the second sealing portion to abut against the inner peripheral wall of the first end, thereby achieving sealing cooperation, and enabling the contact area between the second sealing portion and the first end to be relatively small after they abut, and the force-bearing area of the second sealing portion to be relatively small. Therefore, making the first sealing portion a recessed portion and the second sealing portion a protruding portion can enable the force-bearing area of the first sealing portion to be larger than that of the second sealing portion, thereby realizing the switching of the internal pressure value of the cooking container during use.

[0010] In a specific embodiment, along the direction from the air outlet to the air inlet, the cross-sectional area of the first sealing portion gradually increases, and the second sealing portion is conical or spherical.

[0011] In this embodiment, along the direction from the air outlet to the air inlet, making the cross-sectional area of the first sealing portion gradually increase enables the side wall of the first sealing portion to be inclined relative to the height direction of the pressure limiting valve, and the cross-sectional area of the portion of the first sealing portion that abuts against the outer peripheral wall of the first end is relatively small, thereby improving the sealing reliability of the air outlet. At the same time, the first sealing portion with a gradually increasing cross-sectional area does not block the movement of the valve core relative to the first end along the height direction of the pressure limiting valve, thereby facilitating the release of the seal of the recessed portion on the air outlet and enabling the steam in the container body to be discharged. At the same time, making the second sealing portion conical or spherical enables the outer peripheral wall of the second sealing portion to be in sealing cooperation with the inner peripheral wall of the first end, improving the sealing effect of the second sealing portion on the first end.

[0012] In a specific embodiment, a first limiting member is provided at one end of the valve body at the first opening, and a second limiting member is provided at one end of the valve body at the second opening. The first limiting member and the second limiting member are respectively used for abutting against both ends of the valve core.

[0013] In this embodiment, when the limit valve is switched from the second state to the first state, the valve core needs to move along the height direction of the pressure limiting valve towards the second opening until the side of the valve core facing the second sealing portion abuts against the second limiting member, while ensuring that the exhaust pipe can extend into the valve cavity through the first opening and preventing the valve core from detaching from the valve body. When the pressure limiting valve is switched from the first state to the second state, the valve core needs to move along the height direction of the pressure limiting valve towards the first opening until the side of the valve core facing the first sealing portion abuts against the first limiting member, while ensuring that the exhaust pipe can extend into the valve cavity through the second opening and preventing the valve core from detaching from the valve body.

[0014] In a specific embodiment, a sealing ring is provided on the outer wall of the valve core; the inner wall of the valve body has a first clamping groove and a second clamping groove oppositely arranged along the height direction of the pressure limiting valve, the first clamping groove is located on the side of the first limiting member facing the second limiting member, and the second clamping groove is located on the side of the second limiting member facing the first limiting member; when the valve core abuts against the first limiting member, the sealing ring is in clamping fit with the first clamping groove, and when the valve core abuts against the second limiting member, the sealing ring is in clamping fit with the second clamping groove.

[0015] In this embodiment, a sealing ring is provided on the outer wall of the valve core, which can further improve the sealing performance when the valve core is connected to the inner wall of the valve body. At the same time, when the pressure limiting valve is switched from the second state to the first state, the valve core drives the sealing ring to move towards the second opening until it is in clamping fit with the second clamping groove, and the valve core abuts against the second limiting member, so that the valve core and the inner wall of the valve body are fixedly connected, restricting the valve core from continuing to move along the height direction of the pressure limiting valve, keeping the valve core and the valve body relatively fixed, and facilitating the valve core and the valve body to be lifted under the action of steam pressure to achieve pressure relief; when the pressure limiting valve is switched from the first state to the second state, the valve core drives the sealing ring to move to be in clamping fit with the first clamping groove, and the valve core abuts against the first limiting member, so that the valve core and the inner wall of the valve body are fixedly connected, restricting the valve core from continuing to move along the height direction of the pressure limiting valve, keeping the valve core and the valve body relatively fixed, and facilitating the valve core and the valve body to be lifted under the action of steam pressure to achieve pressure relief.

[0016] In a specific embodiment, the exhaust pipe is further provided with an outwardly protruding connecting portion, the connecting portion is located between the air inlet and the air outlet, both the first limiting member and the second limiting member include a first limiting portion and a mounting portion, the mounting portion is mounted on the valve body, the first limiting portion has a mounting hole, and the exhaust pipe passes through the mounting hole of the first limiting member or passes through the mounting hole of the second limiting member; the cross-sectional area of the connecting portion is larger than the cross-sectional area of the mounting hole, and the cross-sectional area of the exhaust pipe is smaller than the cross-sectional area of the mounting hole.

[0017] In this embodiment, both the first limiting member and the second limiting member include an installation portion fixedly connected to the valve body, which can improve the connection reliability between the first limiting member and the second limiting member and the valve body, and prevent the first limiting member or the second limiting member from separating from the valve body during use. Moreover, the first limiting member and the second limiting member have a first limiting portion including an installation hole, enabling the exhaust pipe to pass through the installation hole, so that the first limiting portion can be sleeved on the exhaust pipe through the installation hole. During the operation of the pressure limiting valve, when the steam pressure drives the valve body and the valve core to move relative to the exhaust pipe, the first limiting member or the second limiting member can adjust the movement trajectory of the valve body and the valve core when moving along the height direction of the pressure limiting valve, preventing the valve body and the valve core from tilting relative to the exhaust pipe.

[0018] Meanwhile, the cross-sectional area of the connecting portion is made larger than the cross-sectional area of the installation hole. When the valve core drives the first limiting portion to move until it abuts against the connecting portion, the connecting portion can limit the continuous movement of the first limiting portion, thereby restricting the continuous movement of the valve core and the valve body. While ensuring the unsealing of the air outlet, it can prevent the valve core and the valve body from detaching under a large steam pressure. Therefore, making the cross-sectional area of the connecting portion larger than the cross-sectional area of the installation hole can limit the maximum distance that the valve core and the valve body move away from the exhaust pipe along the height direction of the pressure limiting valve, prevent the valve core and the valve body from detaching from the exhaust pipe, and improve the safety of using the pressure limiting valve.

[0019] In a specific embodiment, the valve core is further provided with a second limiting portion protruding outward along the height direction of the pressure limiting valve. When the first limiting member abuts against the valve core, the second limiting portion is used to cooperate with the installation hole of the first limiting member.

[0020] In this embodiment, when switching the pressure limiting valve from the first state to the second state, it is necessary to move the valve core along the height direction of the pressure limiting valve towards the first opening until the side of the valve core facing the first sealing portion abuts against the first limiting member. Therefore, a second limiting portion protruding outward is provided on the side of the valve core facing the first sealing portion. The second limiting portion can extend into the installation hole of the first limiting member, and the side wall of the second limiting portion can be in clamping cooperation with the side wall of the installation hole of the first limiting member. While restricting the detachment of the valve core from the valve body, it can also prevent the valve core and the exhaust pipe from tilting.

[0021] In a specific embodiment, the first limiting member and the second limiting member are snap rings.

[0022] In this embodiment, making the first limiting member and the second limiting member as snap rings has the advantages of compact structure, long service life, convenient operation, high reliability, etc. It can reduce the size of the first limiting member and the second limiting member, thereby reducing the overall size of the pressure limiting valve, and it is not easy to interfere with other components. At the same time, making the first limiting member and the second limiting member as snap rings is not easy to be damaged and can extend the service life.

[0023] In a second aspect, an embodiment of the present application provides a cooking container, which includes a container body and a container lid. The container lid includes a lid body and a pressure limiting valve installed on the lid body.

[0024] In this embodiment, when the pressure limiting valve is in the first state, when the cooking container is heated and used, the pressure inside the container body is less than the self-weight of the valve body, the valve core, and other components installed on the valve body. Under the action of gravity, the first end of the exhaust pipe is hermetically fitted with the first sealing portion on the valve core, thereby sealing the air outlet, ensuring the overall sealing of the cooking container. When the pressure inside the container body reaches the first exhaust pressure, the first sealing portion and the valve body can be lifted, releasing the sealing of the air outlet by the first sealing portion, enabling the steam inside the container body to flow through the air inlet to the air outlet and be discharged to the outside through the through hole; when the pressure limiting valve is in the second state, when the cooking container is heated and used, the pressure inside the container body is less than the self-weight of the valve body, the valve core, and other components installed on the valve body. Under the action of gravity, the first end of the exhaust pipe is hermetically fitted with the second sealing portion on the valve core, thereby sealing the air outlet, ensuring the overall sealing of the cooking container. When the pressure inside the container body reaches the second exhaust pressure, the second sealing portion and the valve body can be lifted, releasing the sealing of the air outlet by the second sealing portion, enabling the steam inside the container body to flow through the air inlet to the air outlet 11b and be discharged to the outside through the through hole.

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

[0026] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the present application. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0027] Figure 1 Structural schematic diagram of the pressure limiting valve provided by the present application in a specific embodiment;

[0028] Figure 2 Structural schematic diagram of the pressure limiting valve and the lid body provided by the present application in a specific embodiment;

[0029] Figure 3 Structural schematic diagram of the pressure limiting valve provided by the present application in another specific embodiment;

[0030] Figure 4 For Figure 1 Structural schematic diagram of the pressure limiting valve in another specific embodiment;

[0031] Figure 5 ForFigure 3 Structural schematic diagram of the medium pressure relief valve in another specific embodiment;

[0032] Figure 6 is Figure 1 Structural schematic diagram of the medium valve core;

[0033] Figure 7 is Figure 1 Structural schematic diagram of the medium exhaust pipe;

[0034] Figure 8 is Figure 1 Structural schematic diagram of the medium limiting member;

[0035] Figure 9 is Figure 1 Structural schematic diagram of the medium limiting member and the exhaust pipe;

[0036] Figure 10 is Figure 1 Structural schematic diagram of the medium valve body.

[0037] Explanation of reference numerals:

[0038] 1 - Container cover;

[0039] 11 - Pressure relief valve;

[0040] 111 - Valve body;

[0041] 111a - Valve cavity;

[0042] 111b - First opening;

[0043] 111c - Second opening;

[0044] 111d - First card slot;

[0045] 111e - Second card slot;

[0046] 111f - First valve body;

[0047] 111g - Second valve body;

[0048] 112 - Exhaust pipe;

[0049] 112a - Intake port;

[0050] 112b - Outlet port;

[0051] 112c - First end;

[0052] 112d - Connection part;

[0053] 113 - Valve core;

[0054] 113a - First sealing part;

[0055] 113b - Second sealing portion;

[0056] 114 - Limiting member;

[0057] 114a - First limiting portion;

[0058] 114b - Mounting portion;

[0059] 114c - Mounting hole;

[0060] 114d - First limiting member;

[0061] 114e - Second limiting member;

[0062] 115 - Sealing ring;

[0063] 116 - Ring groove;

[0064] 117 - Second limiting portion;

[0065] 12 - Cover body;

[0066] 121 - Connection hole. Detailed implementation manners

[0067] For a better understanding of the technical solution of the present application, the embodiments of the present application will be described in detail below with reference to the accompanying drawings.

[0068] 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 shall fall within the protection scope of the present application.

[0069] 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.

[0070] It should be understood that the term " / and / " used herein is only a description of the association relationship of associated objects, indicating that there can be three relationships. For example, A and / or B can represent: A exists alone, A and B exist simultaneously, and B exists alone. In addition, the character " / " herein generally represents an "or" relationship between the associated objects before and after.

[0071] The embodiments of the present application provide a pressure limiting valve 11 and a cooking container including the pressure limiting valve 11. The cooking container can be a pressure cooker, a low-pressure cooker, an electric rice cooker, etc. The cooking container includes a container lid 1 and a container body. The container lid 1 can be covered on the container body. Among them, as Figure 1 andFigure 2 As shown, the container cover 1 includes a cover body 12 and a pressure limiting valve 11 installed on the cover body 12 .

[0072] like Figure 1 As shown, the pressure limiting valve 11 includes a valve body 111, an exhaust pipe 112 and a valve core 113. The valve body 111 has a valve cavity 111a connected to the outside, and the valve cavity 111a has a first opening 111b and a second opening 111c arranged opposite to each other along the height direction of the pressure limiting valve 11. The exhaust pipe 112 is detachably connected to the valve body 111, and the exhaust pipe 112 has an air inlet 112a and an air outlet 112b arranged opposite to each other along the height direction of the pressure limiting valve 11. The exhaust pipe 112 includes a first end 112c along the height direction of the pressure limiting valve 11, and the air outlet 112b is arranged opposite to each other. It is arranged at the first end 112c, and the first end 112c can extend into the valve cavity 111a through the first opening 111b or the second opening 111c, and the valve core 113 is located in the valve cavity 111a, wherein the valve core 113 can move relative to the valve body 111 along the height direction of the pressure-limiting valve 11, and the valve core 113 is provided with a first sealing portion 113a and a second sealing portion 113b at both ends of the height direction of the pressure-limiting valve 11, respectively, and the first sealing portion 113a and the second sealing portion 113b are used to seal and cooperate with the first end 112c to block the air outlet 112b.

[0073] When the pressure limiting valve 11 is installed on the cooking container, Figure 1 and Figure 2 As shown, the exhaust pipe 112 can be installed on the cover body 12, and the installation method includes but is not limited to a fixed connection or a detachable connection with the cover body 12 through a connecting hole 121 on the cover body 12 of the container cover 1. At this time, the air inlet 112a is located on the side of the cover body 12 away from the pressure limiting valve 11, and is connected to the cavity of the container body.

[0074] In this embodiment, along the height direction of the pressure limiting valve 11 , the first sealing portion 113 a is arranged toward the first opening 111 b , and the second sealing portion 113 b is arranged toward the second opening 111 c . When the first end 112c extends into the valve cavity 111a through the first opening 111b, the first end 112c is sealed and matched with the first sealing portion 113a. At this time, the pressure-limiting valve 11 is in the first state and has a first exhaust pressure. When the pressure-limiting valve 11 needs to be switched to the second state, the valve body 111 needs to be separated from the exhaust pipe 112 first, that is, the valve body 111 and the valve core 113 installed on the valve body 111 are removed from the exhaust pipe 112, so that the valve core 113 moves toward the first opening 111b to a preset position along the height direction of the pressure-limiting valve 11, and the pressure-limiting valve 11 is flipped over, so that the first end 112c extends into the valve cavity 111a through the second opening 111c, and is sealed and matched with the second sealing portion 113b, that is, the valve core 113 is reconnected with the exhaust pipe 112. At this time, the pressure-limiting valve 11 is in the second state and has a second exhaust pressure.

[0075] When the pressure limiting valve 11 is in the first state, when the cooking container is heated and used, the pressure inside the container body is less than the self-weights of the valve body 111, the valve core 113 and other components installed on the valve body 111. Under the action of gravity, the first end 112c of the exhaust pipe 112 is hermetically fitted with the first sealing portion 113a on the valve core 113, thereby sealing the air outlet 112b and ensuring the overall sealing performance of the cooking container. At the same time, please refer to Figure 4 , when the pressure inside the container body reaches the first exhaust pressure, the first sealing portion 113a and the valve body 111 can be lifted, releasing the sealing of the air outlet 112b by the first sealing portion 113a, so that the steam inside the container body can flow through the air inlet 112a to the air outlet 112b and be discharged to the outside through the through hole 111a to achieve pressure relief; when the pressure limiting valve 11 is in the second state, when the cooking container is heated and used, the pressure inside the container body is less than the self-weights of the valve body 111, the valve core 113 and other components installed on the valve body 111. Under the action of gravity, the first end 112c of the exhaust pipe 112 is hermetically fitted with the second sealing portion 113b on the valve core 113, thereby sealing the air outlet 112b and ensuring the overall sealing performance of the cooking container. At the same time, please refer to Figure 5 , when the pressure inside the container body reaches the second exhaust pressure, the second sealing portion 113b and the valve body 111 can be lifted, releasing the sealing of the air outlet 112b by the second sealing portion 113b, so that the steam inside the container body can flow through the air inlet 112a to the air outlet 112b and be discharged to the outside through the through hole 111a to achieve pressure relief.

[0076] Among them, the above-mentioned first exhaust pressure and second exhaust pressure can be different, so that users can adjust the pressure limiting valve 11 to be in the first state or the second state according to needs, and then the cooking container can have different exhaust pressures, improving the applicability of the cooking container. In addition, when the pressure limiting valve 11 is switched between the first state and the second state by the relative movement of the valve core 113 with respect to the valve body 111, the size of the valve cavity 111a along the height direction of the pressure limiting valve 11 does not need to be set too large, which is beneficial to reducing the volume of the pressure limiting valve 11.

[0077] In a specific embodiment, as Figure 1 and Figure 3 shown, the valve core 113 and the inner wall of the valve body 111 can be in sliding fit.

[0078] In this embodiment, making the valve core 113 and the inner wall of the valve body 111 in sliding fit facilitates the movement of the valve core 113 relative to the valve body 111 along the height direction of the pressure limiting valve 11, so as to facilitate switching the cooperation between the first end 112c and the first sealing portion 113a or the second sealing portion, and then switching the cooking container to have the first exhaust pressure or the second exhaust pressure.

[0079] In another specific embodiment, the valve core 113 and the inner wall of the valve body 111 can also be threadedly connected. Corresponding threads (not shown in the figure) can be provided on the inner wall of the valve core 113 and the valve body 111. By rotating the valve core 113 relative to the inner wall of the valve body 111, the valve core 113 moves relative to the valve body 111 along the height direction of the pressure limiting valve 11. In this embodiment, making the valve core 113 and the inner wall of the valve body 111 be threadedly connected can further improve the connection reliability between the valve core 113 and the inner wall of the valve body 111.

[0080] In a specific embodiment, as Figure 1 and Figure 3 shown, the force-bearing area when the first sealing portion 113a is in sealing cooperation with the first end 112c is larger than the force-bearing area when the second sealing portion 113b is in sealing cooperation with the first end 112c. That is to say, the contact area between the first sealing portion 113a and the first end 112c is larger than the contact area between the second sealing portion 113b and the first end 112c.

[0081] In this embodiment, the weights of the valve body 111, the valve core 113, and other components installed on the valve body 111 are constant. Making the force-bearing area of the first sealing portion 113a larger than that of the second sealing portion 113b, when the first end 112c is in sealing cooperation with the first sealing portion 113a, due to the larger force-bearing area of the first sealing portion 113a, the steam pressure value required to lift the first sealing portion 113a is smaller, that is, the first exhaust pressure is smaller; when the first end 112c is in cooperation with the second sealing portion 113b, due to the smaller force-bearing area of the second sealing portion 113b, the steam pressure value required to lift the second sealing portion 113b is larger, that is, the second exhaust pressure is larger.

[0082] Therefore, in this embodiment, making the force-bearing area of the first sealing portion 113a larger than that of the second sealing portion 113b can change the pressure value in the cooking container under different usage conditions, enabling the user to adjust the pressure value in the cooking container as needed, and improving the usage effect and applicability of the cooking container.

[0083] In a specific embodiment, as Figure 1 and Figure 3 shown, the first sealing portion 113a is a recessed portion, and the inner peripheral wall of the first sealing portion 113a is in sealing cooperation with the outer peripheral wall of the first end 112c; the second sealing portion 113b is a protruding portion, and the outer peripheral wall of the second sealing portion 113b is in sealing cooperation with the inner peripheral wall of the first end 112c.

[0084] In this embodiment, the first sealing portion 113a is a recessed portion, so that the inner peripheral wall of the first sealing portion 113a can abut against the outer peripheral wall of the first end 112c, thereby achieving a sealing fit, and enabling a relatively large contact area between the first sealing portion 113a and the first end 112c after they abut, and a relatively large force-bearing area of the first sealing portion 113a. At the same time, the second sealing portion 113b is a recessed portion, so that the outer peripheral wall of the second sealing portion 113b abuts against the inner peripheral wall of the first end 112c, thereby achieving a sealing fit, and enabling a relatively small contact area between the second sealing portion 113b and the first end 112c after they abut, and a relatively small force-bearing area of the second sealing portion. Therefore, by making the first sealing portion 113a a recessed portion and the second sealing portion 113b a protruding portion, the force-bearing area of the first sealing portion 113a can be made larger than that of the second sealing portion 113b, thereby realizing the switching of the pressure value inside the cooking container during use.

[0085] In a specific embodiment, as Figure 1 shown, along the direction from the air outlet 112b to the air inlet 112a, the cross-sectional area of the first sealing portion 113a can gradually increase, so that the side wall of the first sealing portion 113a is inclined relative to the height direction of the pressure limiting valve 11, and the cross-sectional area of the portion of the first sealing portion 113a that abuts against the outer peripheral wall of the first end 112c is relatively small, thereby improving the sealing reliability of the air outlet 112b. At the same time, the first sealing portion 113a with a gradually increasing cross-sectional area does not block the movement of the valve core 113 relative to the first end 112c along the height direction of the pressure limiting valve 11, thereby facilitating the release of the seal of the recessed portion on the air outlet 112b and enabling the steam in the container body to be discharged.

[0086] At the same time, the second sealing portion 113b is conical or spherical, so that the outer peripheral wall of the second sealing portion 113b can be in sealing fit with the inner peripheral wall of the first end 112c, improving the sealing effect of the second sealing portion 113b on the first end 112c.

[0087] In a specific embodiment, as Figure 1 and Figure 3 shown, the valve body 111 is provided with a first limiting member 114d at one end of the first opening 111b, and the valve body 111 is provided with a second limiting member 114e at one end of the second opening 111c. The first limiting member 114d and the second limiting member 114e are respectively used to abut against both ends of the valve core 113.

[0088] In this embodiment, as Figure 1As shown, when the pressure limiting valve 11 is switched from the second state to the first state, the valve core 113 needs to move along the height direction of the pressure limiting valve 11 towards the second opening 111c until the side of the valve core 113 facing the second sealing portion 113b abuts against the second limiting member 114e. While ensuring that the exhaust pipe 112 can extend into the valve cavity 111a through the first opening 111b, the valve core 113 is prevented from detaching from the valve body 111. As Figure 3 shown, when the pressure limiting valve 11 is switched from the first state to the second state, the valve core 113 needs to move along the height direction of the pressure limiting valve 11 towards the first opening 111b until the side of the valve core 113 facing the first sealing portion 113a abuts against the first limiting member 114d. While ensuring that the exhaust pipe 112 can extend into the valve cavity 111a through the second opening 111c, the valve core 113 is prevented from detaching from the valve body 111.

[0089] In a specific embodiment, as Figure 1 、 Figure 3 and Figure 6 shown, a sealing ring 115 is provided on the outer wall of the valve core 113, and the inner wall of the valve body 111 has a first clamping groove 111d and a second clamping groove 111e oppositely arranged along the height direction of the pressure limiting valve 11. The first clamping groove 111d is located on the side of the first limiting member 114d facing the second limiting member 114e, and the second clamping groove 111e is located on the side of the second limiting member 114e facing the first limiting member 114d; when the valve core 113 abuts against the first limiting member 114d, the sealing ring 115 is in clamping fit with the first clamping groove 111d, and when the valve core 113 abuts against the second limiting member 114e, the sealing ring 115 is in clamping fit with the second clamping groove 111e.

[0090] In this embodiment, a sealing ring 115 is provided on the outer wall of the valve core 113, which can further improve the sealing performance when the valve core 113 is connected to the inner wall of the valve body 111. At the same time, as Figure 1 and Figure 5 shown, when the pressure limiting valve 11 is switched from the second state to the first state, the valve core 113 drives the sealing ring 115 to move towards the second opening 111c until it is in clamping fit with the second clamping groove, and the valve core 113 abuts against the second limiting member 114e, thereby fixedly connecting the valve core 113 and the inner wall of the valve body 111, restricting the valve core 113 from continuing to move along the height direction of the pressure limiting valve 11, and keeping the valve core 113 and the valve body 111 relatively fixed, facilitating the valve core 113 and the valve body 111 to be lifted under the action of the steam pressure to achieve pressure relief; as Figure 3 and Figure 5As shown, when the pressure limiting valve 11 is switched from the first state to the second state, the valve core 113 drives the sealing ring 115 to move to be clamped and matched with the first clamping groove, and the valve core 113 abuts against the first limiting member 114d, so that the valve core 113 and the inner wall of the valve body 111 are fixedly connected, restricting the valve core 113 from continuing to move along the height direction of the pressure limiting valve 11, keeping the valve core 113 and the valve body 111 relatively fixed, and facilitating the valve core 113 and the valve body 111 to be lifted under the action of the steam pressure to achieve pressure relief.

[0091] Wherein, the first limiting member 114d and the second limiting member 114e in this embodiment can be limiting members 114 with the same structure.

[0092] In a specific embodiment, as Figure 3 、 Figure 7 and Figure 8 shown, the exhaust pipe 112 is further provided with an outwardly protruding connecting portion 112d, and the connecting portion 112d is located between the air inlet 112a and the air outlet 112b; both the first limiting member 114d and the second limiting member 114e include a first limiting portion 114a and a mounting portion 114b, the mounting portion 114b is mounted on the valve body 111, the first limiting portion 114a has a mounting hole 114c, and the exhaust pipe 112 passes through the mounting hole 114c; the cross-sectional area of the connecting portion 112d is larger than the cross-sectional area of the mounting hole 114c, and the cross-sectional area of the exhaust pipe 112 is smaller than the cross-sectional area of the mounting hole 114c.

[0093] In this embodiment, both the first limiting member 114d and the second limiting member 114e include a mounting portion 114b fixedly connected to the valve body 111, which can improve the connection reliability between the first limiting member 114d and the second limiting member 114e and the valve body 111, and prevent the first limiting member 114d or the second limiting member 114e from separating from the valve body 111 during use. And the first limiting member 114d and the second limiting member 114e have a first limiting portion 114a including a mounting hole 114c, enabling the exhaust pipe 112 to pass through the mounting hole 114c, so that the first limiting portion 114a can be sleeved on the exhaust pipe 112 through the mounting hole 114c. During the working process of the pressure limiting valve 11, when the steam pressure drives the valve body 111 and the valve core 113 to move relative to the exhaust pipe 112, the first limiting member 114d or the second limiting member 114e can adjust the movement trajectory of the valve body 111 and the valve core 113 when moving along the height direction of the pressure limiting valve 11, avoiding tilting between the valve body 111 and the valve core 113 and the exhaust pipe 112.

[0094] At the same time, please refer to Figure 9, the cross-sectional area of the connecting portion 112d is made larger than that of the mounting hole 114c. When the valve core 113 drives the first limiting portion 114a to move until it abuts against the connecting portion 112d, the connecting portion 112d can limit the continued movement of the first limiting portion 114a, thereby restricting the continued movement of the valve core 113 and the valve body 111. While ensuring the unsealing of the air outlet 112b, it is possible to prevent the valve core 113 and the valve body 111 from detaching from the exhaust pipe 112 under a relatively large steam pressure. Therefore, making the cross-sectional area of the connecting portion 112d larger than that of the mounting hole 114c can limit the maximum distance that the valve core 113 and the valve body 111 move away from the exhaust pipe 112 along the height direction of the pressure limiting valve 11, prevent the valve core 113 and the valve body 111 from detaching from the exhaust pipe 112, and improve the use safety of the pressure limiting valve 11.

[0095] Among them, in this embodiment, as Figure 1 shown, when the first end 112c is in sealing fit with the first sealing portion 113a, the first limiting member 114d is used to limit the maximum distance that the valve core 113 and the valve body 111 move away from the exhaust pipe 112 along the height direction of the pressure limiting valve 11; as Figure 3 shown, when the first end 112c is in sealing fit with the second sealing portion 113b, the second limiting member 114e is used to limit the maximum distance that the valve core 113 and the valve body 111 move away from the exhaust pipe 112 along the height direction of the pressure limiting valve 11.

[0096] In a specific embodiment, as Figure 3 , Figure 6 and Figure 9 shown, the valve core 113 may further be provided with a second limiting portion 117 protruding outward along the height direction of the pressure limiting valve 11. When the first limiting member 114d abuts against the valve core 113, the second limiting portion 117 is used to cooperate with the mounting hole 114c of the first limiting member 114d.

[0097] In this embodiment, when the pressure limiting valve 11 is switched from the first state to the second state, the valve core 113 needs to be moved along the height direction of the pressure limiting valve 11 towards the first opening 111b until the side of the valve core 113 facing the first sealing portion 113a abuts against the first limiting member 114d. Therefore, a second limiting portion 117 protruding outward is provided on the side of the valve core 113 facing the first sealing portion 113a. The second limiting portion 117 can extend into the mounting hole 114c of the first limiting member 114d, and the side wall of the second limiting portion 117 can prevent an inclination between the valve core 113 and the exhaust pipe 112, improving the connection reliability of the valve core 113 and the valve body 111 in this state, thereby improving the sealing reliability of the second sealing portion 113b and the air outlet 112b.

[0098] In a specific embodiment, the first limiting member 114d and the second limiting member 114e may be snap rings.

[0099] In this embodiment, the first limiting member 114d and the second limiting member 114e are snap rings, which have the advantages of compact structure, long service life, convenient operation, high reliability, etc. They can reduce the sizes of the first limiting member 114d and the second limiting member 114e, thereby reducing the overall size of the pressure limiting valve 11, and are not likely to interfere with other components. At the same time, making the first limiting member 114d and the second limiting member 114e snap rings makes them not easily damaged and can extend the service life.

[0100] In the above embodiments, as Figure 10 shown, the valve body 111 may include a first valve body 111f and a second valve body 111g. The first valve body 111f is sleeved on the second valve body 111g, and the valve cavity 111a is arranged in the second valve body 111g.

[0101] In this embodiment, the valve body 111 includes a first valve body 111f and a second valve body 111g, and the materials of the first valve body 111f and the second valve body 111g may be different. The first valve body 111f may be made of a material with good heat insulation, such as wood or rubber. During the use of the cooking container, since the steam flows through the air outlet of the exhaust pipe to the valve core and the steam has a relatively high temperature, making the first valve body 111f a material with good heat insulation can prevent the heat of the steam from being conducted to the first valve body 111f, preventing the user from being scalded when touching the first valve body 111f and improving the use safety of the pressure limiting valve. The second valve body 111g may be made of a material with strong stiffness, such as metal. Making the second valve body 111g a metal material can extend the service life of the second valve body 111g, reduce the situation that the second valve body 111g is damaged and affects the sealing, and can provide support for other components in the pressure limiting valve.

[0102] Among them, in this embodiment, the first valve body 111f and the second valve body 111g can be integrally injection-molded to improve the connection reliability between the first valve body 111f and the second valve body 111g.

[0103] In a specific embodiment, as Figure 3 and Figure 10 shown, a ring groove 116 may be provided on the inner wall of the second valve body 111g, and the installation portion 114b is snap-fitted in the ring groove 116, which can improve the connection reliability between the installation portion 114b and the valve body 111 and prevent them from separating during use.

[0104] 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, characterized in that: The pressure limiting valve comprises: A valve body (111), the valve body (111) comprising a valve cavity (111a) communicating with the outside, the valve cavity (111a) comprising a first opening (111b) and a second opening (111c) arranged opposite to each other along a height direction of the pressure-limiting valve (11); an exhaust pipe (112) detachably connected to the valve body (111), the exhaust pipe (112) comprising an air inlet (112a) and an air outlet (112b) arranged opposite to each other along the height direction of the pressure-limiting valve (11), the exhaust pipe (112) comprising a first end (112c) along the height direction of the pressure-limiting valve (11), the air outlet (112b) being arranged at the first end (112c), and the first end (112c) being able to extend into the valve cavity (111a) through the first opening (111b) or the second opening (111c); A valve core (113), the valve core (113) being located in the valve cavity (111a); The valve core (113) is capable of moving relative to the valve body (111) along the height direction of the pressure-limiting valve (11), and the valve core (113) is provided with a first sealing portion (113a) and a second sealing portion (113b) at both ends of the valve core (113) along the height direction of the pressure-limiting valve (11), respectively, and the first sealing portion (113a) and the second sealing portion (113b) are used to seal with the first end (112c) to block the air outlet (112b).

2. The pressure limiting valve according to claim 1, characterized in that: The valve core (113) is slidably matched with the inner wall of the valve body (111).

3. The pressure limiting valve according to claim 1, characterized in that: The first sealing portion (113a) is a recessed portion, and the inner peripheral wall of the first sealing portion (113a) is used for sealingly cooperating with the outer peripheral wall of the first end (112c); the second sealing portion (113b) is a raised portion, and the outer peripheral wall of the second sealing portion (113b) is used for sealingly cooperating with the inner peripheral wall of the first end (112c).

4. The pressure limiting valve according to claim 3, characterized in that: Along the direction from the air outlet (112b) to the air inlet (112a), the cross-sectional area of ​​the first sealing portion (113a) gradually increases, and the second sealing portion (113b) is conical or spherical.

5. The pressure limiting valve according to any one of claims 1 to 4, characterized in that: The valve body (111) is provided with a first position-limiting member (114d) at one end of the first opening (111b), and the valve body (111) is provided with a second position-limiting member (114e) at one end of the second opening (111c), and the first position-limiting member (114d) and the second position-limiting member (114e) are respectively used to abut against two ends of the valve core (113).

6. The pressure limiting valve according to claim 5, characterized in that: The outer wall of the valve core (113) is provided with a sealing ring (115); the inner wall of the valve body (111) has a first clamping groove (111d) and a second clamping groove (111e) which are arranged opposite to each other along the height direction of the pressure-limiting valve (11), the first clamping groove (111d) being located on a side of the first limiting member (114d) facing the second limiting member (114e), and the second clamping groove (111e) being located on a side of the second limiting member (114e) facing the first limiting member (114d); When the valve core (113) abuts against the first position-limiting member (114d), the sealing ring (115) is engaged with the first clamping groove (111d); when the valve core (113) abuts against the second position-limiting member (114e), the sealing ring (115) is engaged with the second clamping groove (111e).

7. The pressure limiting valve according to claim 5, characterized in that: The exhaust pipe (112) is further provided with a connecting portion (112d) protruding outwards, the connecting portion (112d) being located between the air inlet (112a) and the air outlet (112b), the first limiting member (114d) and the second limiting member (114e) both comprising a first limiting member (114a) and a mounting portion (114b), the mounting portion (114b) being mounted on the valve body (111), the first limiting member (114a) having a mounting hole (114c), the exhaust pipe (112) passing through the mounting hole (114c) of the first limiting member (114d) or passing through the mounting hole (114c) of the second limiting member (114e); The cross-sectional area of ​​the connecting portion (112d) is larger than the cross-sectional area of ​​the mounting hole (114c), and the cross-sectional area of ​​the exhaust pipe (112) is smaller than the cross-sectional area of ​​the mounting hole (114c).

8. The pressure limiting valve according to claim 7, characterized in that: The valve core (113) is further provided with a second limiting portion (117) protruding outwardly along the height direction of the pressure limiting valve (11), and when the first limiting member (114d) abuts against the valve core (113), the second limiting portion (117) is used to cooperate with the mounting hole (114c) of the first limiting member (114d).

9. The pressure limiting valve according to claim 6, characterized in that: The first limiting member (114d) and the second limiting member (114e) are clip springs.

10. A cooking container, characterized in that: The cooking container comprises: container body; A container cover (1), the container cover (1) comprising a cover body (12) and a pressure limiting valve (11) mounted on the cover body (12); Wherein, the pressure-limiting valve (11) is the pressure-limiting valve (11) according to any one of claims 1 to 9.

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