Pressure limiting valve and cooking container

Abstract

The utility model relates to the technical field of cooking utensils, in particular to a pressure limiting valve and a cooking container. The pressure limiting valve comprises a valve body, a clamping ring and an exhaust pipe, the valve body is provided with a valve cavity, the clamping ring is installed in the valve cavity, and part of the structure of the exhaust pipe can stretch into the valve cavity and is matched with the clamping ring. The exhaust pipe is provided with an exhaust hole, the exhaust hole is communicated with the valve cavity, and the valve body and the clamping ring can move relative to the exhaust pipe to open or close the exhaust hole so that the pressure limiting valve can be in an exhaust state or a sealing state. The outer side wall of the exhaust pipe is provided with a first limiting protrusion, and the first limiting protrusion can abut against the clamping ring. In the axial direction of the pressure limiting valve, the first limiting protrusion is provided with a first guide face and a second guide face, when the valve body is lifted, the first guide face can guide the clamping ring to move to the position above the first limiting protrusion so as to open the exhaust hole, and when the valve body is pressed, the second guide face can guide the clamping ring to move to the position below the first limiting protrusion so as to close the exhaust hole.

Description

Technical Field

[0001] The present application relates to the technical field of pressure-limiting valves, and in particular to a pressure-limiting valve and a cooking container. Background Art

[0002] Cooking utensils such as steamers and pressure cookers are used more and more frequently as kitchen utensils for cooking. Most existing pressure cookers adopt pressure limiting valves to limit the exhaust volume to maintain the required pressure in the pressure cooker.

[0003] However, the existing pressure limiting valve has a complex structure, high cost, and requires considerable effort for users to operate. Utility Model Content

[0004] The embodiments of the present application provide a pressure limiting valve and a cooking container, which are intended to facilitate user use.

[0005] An embodiment of the present application provides a pressure limiting valve for a cooking container, the pressure limiting valve comprising:

[0006] a valve body, wherein the valve body is provided with a valve cavity;

[0007] a snap ring, the snap ring being mounted on the valve cavity;

[0008] an exhaust pipe, a portion of which is capable of extending into the valve cavity and cooperating with the retaining ring, the exhaust pipe having an exhaust hole, the exhaust hole being in communication with the valve cavity, the valve body and the retaining ring being capable of moving relative to the exhaust pipe to open or close the exhaust hole, thereby placing the pressure-limiting valve in an exhaust state or a sealing state;

[0009] The outer wall of the exhaust pipe is provided with a first limiting protrusion, which can abut against the clamping ring; along the axial direction of the pressure limiting valve, the first limiting protrusion has a first guide surface and a second guide surface;

[0010] When the valve body is lifted, the first guide surface can guide the clamping ring to move above the first limiting protrusion to open the exhaust hole. When the valve body is pressed, the second guide surface can guide the clamping ring to move below the first limiting protrusion to close the exhaust hole.

[0011] In this embodiment of the present application, the valve body, under its own weight, can block the vent, sealing the pressure-limiting valve and restricting the escape of gas from the cooking container. At this point, the retaining ring is positioned axially below the first limiting protrusion in the pressure-limiting valve. In the radial direction of the pressure-limiting valve, the maximum width of the first limiting protrusion is greater than the maximum width of the retaining ring's inner ring. This allows the first limiting protrusion to restrict upward movement of the valve body, thereby maintaining pressure within the cooking container.

[0012] After cooking, the user lifts the valve body, which opens the vent, allowing the gas inside the cooking container to escape through the vent. Simultaneously, the valve body drives the retaining ring upward to above the first stop protrusion. When the user releases the valve body, the retaining ring abuts against the first stop protrusion, preventing the valve body from moving downward under its own weight, which would otherwise block the vent. This maintains the pressure-limiting valve in the venting state.

[0013] The first and second guide surfaces guide the movement of the retaining ring relative to the exhaust pipe. Specifically, when the user lifts the valve body, the retaining ring moves upward along the first guide surface, gradually passing over the first limiting protrusion and moving above the first limiting protrusion, facilitating the user lifting the valve body to vent the cooking container. When the user presses the valve body, the retaining ring moves downward along the second guide surface, gradually passing over the first limiting protrusion and moving below the first limiting protrusion, facilitating the user pressing the valve body to pressurize the cooking container.

[0014] In addition, the embodiment of the present application can reduce the loss caused by the elastic deformation of the retaining ring by providing the first guide surface and the second guide surface, thereby extending the service life of the retaining ring.

[0015] In a possible design, both the first guide surface and the second guide surface are inclined surfaces;

[0016] The inclination angle of the first guide surface is α, 45°≤α≤50°;

[0017] The inclination angle of the second guide surface is β, 45°≤β≤50°.

[0018] In the embodiment of the present application, the inclination angle α of the first guide surface can be 45°, 46°, 47°, 48°, 49°, 50°, etc.

[0019] If α is too large (e.g., α>50°), the slope of the first guide surface is relatively flat. When venting the cooking container, the user needs to forcefully pull up the valve body so that the clamping ring passes over the first limiting protrusion, which may easily cause elastic deformation of the clamping ring, resulting in an increase in the maximum width of the inner ring of the clamping ring, thereby affecting the limiting effect of the clamping ring.

[0020] If α is too small (e.g., α < 45°), the slope of the first guide surface is steeper. When the air pressure in the cooking container is high, the valve body is likely to drive the retaining ring along the first guide surface over the first limiting protrusion under the push of the air pressure, causing the pressure limiting valve to directly exhaust air, thereby affecting the cooking effect of the cooking container.

[0021] Therefore, when the inclination angle α of the first guide surface satisfies 45°≤α≤50°, it ensures that the first limiting protrusion has a good limiting effect while facilitating user operation.

[0022] The inclination angle β of the second guide surface can be 45°, 46°, 47°, 48°, 49°, 50°, etc.

[0023] If β is too large (such as β>50°), the slope of the second guide surface is relatively flat, and the user needs to press the valve body hard to make the clamping ring pass over the first limiting protrusion, which may easily cause elastic deformation of the clamping ring, resulting in an increase in the maximum width of the inner ring of the clamping ring, affecting the limiting effect of the clamping ring.

[0024] If β is too small (such as β < 45°), the slope of the second guide surface is steeper, which may cause the valve body to move downward along the second guide surface under its own gravity and pass over the first limit protrusion, making it impossible to maintain the pressure limiting valve in the exhaust state, affecting the exhaust operation of the pressure limiting valve.

[0025] Therefore, when the inclination angle β of the second guide surface satisfies 45°≤β≤50°, it ensures that the first limiting protrusion has a good limiting effect while facilitating user operation.

[0026] In a possible design, both the first guide surface and the second guide surface are arc surfaces.

[0027] In the embodiment of the present application, both the first guide surface and the second guide surface can be arc surfaces to guide the clamping ring when it moves relative to the exhaust pipe.

[0028] In a possible design, in the sealed state, along the axial direction of the pressure-limiting valve, the distance between the maximum width of the clamping ring and the first limiting protrusion is H1, and 1mm≤H1≤2mm.

[0029] In the embodiment of the present application, in the sealed state, a certain gap is required between the retaining ring and the maximum width of the first limiting protrusion along the axial direction of the pressure-limiting valve, allowing the valve body to move within a certain range. When the pressure within the cooking container is excessive, the air pressure can push the sealing valve core to open a certain range of vent holes, thereby relieving the pressure in the cooking container and reducing the internal pressure, effectively preventing dangerous situations caused by excessive pressure within the cooking container. At this point, the retaining ring abuts against the maximum width of the first limiting protrusion, limiting further upward movement of the valve body and preventing the sealing valve core from opening the vent holes too far.

[0030] The distance H1 between the maximum width of the clamping ring and the first limiting protrusion can be 1 mm, 1.2 mm, 1.4 mm, 1.6 mm, 1.8 mm, 2 mm, etc.

[0031] If H1 is too large (eg H1>2mm), the sealing valve core can be pushed up by the air pressure too far away from the exhaust hole, causing the exhaust hole to open too widely, causing a large amount of gas in the cooking container to be discharged, affecting the cooking effect.

[0032] If H1 is too small (e.g. H1 < 2 mm), the distance that the sealing valve core can be lifted up by the air pressure away from the exhaust hole is too small, resulting in a small opening range of the exhaust hole and slow pressure relief in the cooking container, which may lead to a dangerous situation due to excessive pressure in the cooking container.

[0033] Therefore, when the distance H1 between the clamping ring and the maximum width of the first limiting protrusion is set to satisfy 1mm≤H1≤2mm, a small amount of pressure relief is achieved on the cooking container to ensure cooking safety while ensuring that there is sufficient air pressure in the cooking container to cook food.

[0034] In a possible design, the outer side wall of the exhaust pipe is further provided with a second limiting protrusion;

[0035] Along the axial direction of the pressure-limiting valve, the second limiting protrusion is located above the first limiting protrusion, and the second limiting protrusion can limit the valve body from separating from the exhaust pipe.

[0036] In the embodiment of the present application, in the exhaust state, the retaining ring can be located in the area between the first limiting protrusion and the second limiting protrusion. By providing the second limiting protrusion, the embodiment of the present application limits the separation of the valve body and the exhaust pipe, preventing the user from pulling out the valve body with excessive force. When the pressure-limiting valve is in the exhaust state, the valve body and the exhaust pipe are also in a mating state, reducing the risk of the valve body being lost.

[0037] In a possible design, along the radial direction of the pressure-limiting valve, the maximum width of the first position-limiting protrusion is less than or equal to the maximum width of the second position-limiting protrusion.

[0038] In an embodiment of the present application, by limiting the maximum width of the second limiting protrusion to be greater than the width of the first limiting protrusion, when the user lifts the valve body with force, the retaining ring can pass over the first limiting protrusion but cannot pass over the second limiting protrusion, thereby reducing the risk of the valve body being pulled out.

[0039] In a possible design, a third guide surface is provided at one end of the second limiting protrusion away from the first limiting protrusion;

[0040] The third guide surface is an inclined surface or an arc surface, and the third guide surface can guide one end of the exhaust pipe to pass through the clamping ring and extend into the valve cavity.

[0041] In the embodiment of the present application, a third guide surface is provided to guide the assembly of the exhaust pipe and the clamping ring, thereby facilitating quick installation of the two.

[0042] In a possible design, a limiting surface is provided on one end of the second limiting protrusion close to the first limiting protrusion, and the limiting surface is a plane.

[0043] In the embodiment of the present application, even if the user pulls up the valve body too high, causing the clamping ring to move to the uppermost end of the exhaust pipe, the clamping ring can still abut against the limit surface. The limit surface is a plane, which limits the clamping ring from continuing to move along the limit surface, thereby limiting the separation of the valve body from the exhaust pipe.

[0044] In a possible design, the valve body is provided with a sealing valve core, and in the sealing state, the sealing valve core can block the exhaust hole;

[0045] In the exhaust state, the distance between the exhaust port of the exhaust hole and the sealing position of the sealing valve core is H2, 2mm≤H2≤5mm.

[0046] In the embodiment of the present application, if H2 is too large (eg, H2>5 mm), the user needs to pull up the valve body to a higher height, which increases the height between the exhaust pipe and the valve body and is inconvenient for the user.

[0047] If H2 is too small (eg, H2 < 2 mm), the gas in the cooking container cannot be discharged quickly, which affects the exhaust speed and increases the user's waiting time.

[0048] Therefore, when the distance H2 between the exhaust port of the exhaust hole and the sealing valve core is set to meet 2mm≤H2≤5mm, it is convenient for the user to operate and the pressure limiting valve can be quickly exhausted.

[0049] The present invention also provides a cooking container, comprising:

[0050] container body;

[0051] a container cover, the container cover being capable of covering the container body;

[0052] A pressure limiting valve is installed on the container body or the container cover, and the pressure limiting valve is the pressure limiting valve described above.

[0053] In the embodiment of the present application, the pressure limiting valve can be installed on the container cover.

[0054] Alternatively, the pressure-limiting valve can also be installed on the container body.

[0055] Since the pressure limiting valve has the above-mentioned technical effects, the cooking container including the pressure limiting valve should also have corresponding technical effects, which will not be described in detail here.

[0056] It should be understood that the foregoing general description and the following detailed description are merely illustrative and are not restrictive of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0057] Figure 1 This is a cross-sectional schematic diagram of the pressure limiting valve provided in this application in a sealed state;

[0058] Figure 2 This is a cross-sectional schematic diagram of the pressure limiting valve provided in this application in the exhaust state;

[0059] Figure 3 for Figure 1 A magnified schematic diagram of the middle part A;

[0060] Figure 4 for Figure 2 Enlarged schematic diagram of middle part B;

[0061] Figure 5 for Figure 2 Enlarged schematic diagram of middle C part;

[0062] Figure 6 This is a schematic diagram of the assembly of the valve body and the retaining ring provided in this application;

[0063] Figure 7 A schematic cross-sectional view of the exhaust pipe provided in this application;

[0064] Figure 8 This is a cross-sectional schematic diagram of the pressure limiting valve provided in this application in the exhaust state;

[0065] Figure 9 for Figure 8 Enlarged schematic diagram of part D in the middle.

[0066] Reference numerals:

[0067] 1-pressure limiting valve;

[0068] 11-valve body;

[0069] 111-valve chamber;

[0070] 112-sealing valve core;

[0071] 112a-guide portion;

[0072] 112b-sealing portion;

[0073] 113-card slot;

[0074] 12- snap ring;

[0075] 121-card connection section;

[0076] 122-connecting section;

[0077] 13-exhaust pipe;

[0078] 131-exhaust hole;

[0079] 132-first limiting protrusion;

[0080] 132a-first guide surface;

[0081] 132b- second guide surface;

[0082] 133- second limiting protrusion;

[0083] 133a-third guide surface;

[0084] 133b-limiting surface;

[0085] 134-mounting slot;

[0086] 14- Seal.

[0087] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present application and, together with the description, serve to explain the principles of the present application. DETAILED DESCRIPTION

[0088] In order to better understand the technical solution of the present application, the embodiments of the present application are described in detail below with reference to the accompanying drawings.

[0089] It should be clear that the embodiments described are only part of the embodiments of this application, not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of this application.

[0090] The terms used in the embodiments of the present application are for the purpose of describing specific embodiments only and are not intended to limit the present application. The singular forms "a", "an", "the" and "the" used in the embodiments of the present application and the appended claims are also intended to include plural forms unless the context clearly indicates otherwise.

[0091] It should be understood that the term "and / or" as used herein is merely a description of the relationship between associated objects, indicating that three possible relationships exist. For example, "A and / or B" can represent: A exists alone, A and B exist simultaneously, or B exists alone. Furthermore, the character " / " in this document generally indicates that the associated objects are in an "or" relationship.

[0092] It should be noted that the directional words such as "upper", "lower", "left", and "right" described in the embodiments of the present application are described based on the angles shown in the accompanying drawings and should not be understood as limiting the embodiments of the present application. In addition, in the context, it should be understood that when it is mentioned that an element is connected to another element "on" or "under", it can not only be directly connected to the other element "on" or "under", but also be indirectly connected to the other element "on" or "under" through an intermediate element.

[0093] This embodiment provides a cooking container, which may be a pressure cooker. The cooking container includes a container body, a container lid, and a pressure-limiting valve. The container lid fits over the container body, and the pressure-limiting valve is mounted on the container lid or the container body. During cooking, when the pressure within the cooking container reaches the operating pressure, the pressure-limiting valve operates by venting air, maintaining the pressure within the cooking container within a certain range, thereby achieving the desired cooking effect. After cooking is complete, the pressure-limiting valve is operated to quickly vent air, reducing the pressure within the cooking container, allowing the container lid to be opened.

[0094] The pressure-limiting valve can be mounted on a container lid, which has a through-hole formed therein, allowing the valve to communicate with the inner cavity of the container body through the through-hole. Alternatively, the pressure-limiting valve can be mounted on a container body, which has a through-hole formed on the top wall thereof, allowing the valve to communicate with the inner cavity of the container body through the through-hole. The following description will use the example of a pressure-limiting valve mounted on a container lid.

[0095] The specific structure and usage of the pressure limiting valve will be described in detail below with reference to the accompanying drawings.

[0096] like Figure 1 The figure shows a cross-sectional view of the pressure limiting valve 1 in a sealed state. Figure 2 The figure shows a cross-sectional view of the pressure limiting valve 1 in the exhaust state. Figure 1 and Figure 2 The pressure-limiting valve 1 includes a valve body 11, a retaining ring 12, and an exhaust pipe 13. The valve body 11 is provided with a valve cavity 111, and the retaining ring 12 is installed in the valve cavity 111. The exhaust pipe 13 can partially extend into the valve cavity 111 and cooperate with the retaining ring 12. The exhaust pipe 13 has an exhaust hole 131, which is connected to the valve cavity 111. The valve body 11 is provided with a sealing valve core 112 located in the valve cavity 111. The valve body 11 and the retaining ring 12 can move relative to the exhaust pipe 13, causing the sealing valve core 112 to open or close the exhaust hole 131, thereby placing the pressure-limiting valve 1 in the exhaust state or the sealing state.

[0097] Among them, the outer wall of the exhaust pipe 13 is provided with a first limiting protrusion 132, which can abut against the clamping ring 12 to limit the position of the clamping ring 12, thereby limiting the position of the valve body 11, so that the pressure limiting valve 1 remains in a sealed state or an exhaust state.

[0098] Specifically, if Figure 3 Shown Figure 1 Please refer to the enlarged diagram of part A in the middle Figure 1 and Figure 3Under the weight of the valve body 11, the sealing valve core 112 blocks the vent hole 131, sealing the pressure-limiting valve 1 and preventing gas from escaping the cooking container. At this point, along the axial direction Y of the pressure-limiting valve 1, the retaining ring 12 is located below the first limiting protrusion 132. Along the radial direction X of the pressure-limiting valve 1, the maximum width of the first limiting protrusion 132 is greater than the maximum width of the inner ring of the retaining ring 12. This allows the first limiting protrusion 132 to limit the upward movement of the valve body 11, thereby maintaining the pressure within the cooking container.

[0099] It should be noted that in the sealed state, along the axial direction Y of the pressure-limiting valve 1, a certain gap must exist between the retaining ring 12 and the maximum width of the first limiting protrusion 132, allowing the valve body 11 to move freely. When the pressure in the cooking container is excessive, the air pressure can push the sealing valve core 112 to open a certain range of the vent holes 131, thereby relieving the pressure in the cooking container and reducing the internal pressure, effectively preventing dangerous situations caused by excessive pressure in the cooking container. At this time, the retaining ring 12 abuts the maximum width of the first limiting protrusion 132, limiting the further upward movement of the valve body 11 and preventing the sealing valve core 112 from opening the vent holes 131 too far.

[0100] Please continue to refer to Figure 3 In the sealed state, the distance between the maximum width of the snap ring 12 and the first limiting protrusion 132 is H1, 1mm≤H1≤2mm.

[0101] For example, the distance H1 between the maximum width of the snap ring 12 and the first limiting protrusion 132 can be 1 mm, 1.2 mm, 1.4 mm, 1.6 mm, 1.8 mm, 2 mm, etc. The specific distance H1 can be set according to actual conditions and is not limited in this embodiment.

[0102] In this embodiment, if H1 is too large (such as H1>2mm), the sealing valve core 112 can be pushed up by the air pressure and the distance away from the exhaust hole 131 is too large, resulting in the exhaust hole 131 opening too large a range, causing a large amount of gas in the cooking container to be discharged, affecting the cooking effect.

[0103] If H1 is too small (e.g. H1 < 2 mm), the distance that the sealing valve core 112 can be lifted up by the air pressure away from the exhaust hole 131 is too small, resulting in the exhaust hole 131 opening in a too small range. The cooking container depressurizes slowly, which may cause a dangerous situation due to excessive pressure in the cooking container.

[0104] Therefore, when the distance H1 between the clamp ring 12 and the maximum width of the first limiting protrusion 132 is set to satisfy 1mm≤H1≤2mm, a small amount of pressure relief is achieved on the cooking container to ensure cooking safety while ensuring that there is sufficient air pressure in the cooking container to cook food.

[0105] like Figure 4 Shown Figure 2 Please refer to the enlarged diagram of part B in the middle Figure 2 and Figure 4 After cooking is complete, the user can lift the valve body 11, which drives the sealing valve core 112 to open the exhaust hole 131, allowing the gas in the cooking container to be discharged outward through the exhaust hole 131. At the same time, the valve body 11 drives the retaining ring 12 to move upward to above the first limiting protrusion 132. After the user releases the valve body 11, the retaining ring 12 can abut against the first limiting protrusion 132, limiting the downward movement of the sealing valve core 112 driven by the valve body 11's own weight to block the exhaust hole 131, thereby maintaining the pressure limiting valve 1 in the exhaust state.

[0106] like Figure 5 Shown Figure 2 Please refer to the enlarged diagram of the middle C part Figure 2 and Figure 5 Please continue to refer to Figure 2 In the exhaust state (when the clamping ring 12 abuts against the upper end of the first limiting protrusion 132), the distance between the exhaust port of the exhaust hole 131 and the sealing valve core 112 is H2, 2mm≤H2≤5mm.

[0107] For example, the distance H2 between the exhaust port of the exhaust hole 131 and the sealing valve core 112 can be 2 mm, 3 mm, 4 mm, 5 mm, etc. The specific distance H2 can be set according to actual conditions and is not limited in this embodiment.

[0108] In this embodiment, if H2 is too large (eg, H2>5 mm), the user needs to pull up the valve body 11 to a higher height, which increases the height between the exhaust pipe 13 and the valve body 11 and is inconvenient for the user.

[0109] If H2 is too small (eg, H2 < 2 mm), the gas in the cooking container cannot be discharged quickly, which affects the exhaust speed and increases the user's waiting time.

[0110] Therefore, when the distance H2 between the exhaust port of the exhaust hole 131 and the sealing valve core 112 is set to satisfy 2mm≤H2≤5mm, it is convenient for the user to operate and the pressure limiting valve 1 can be quickly exhausted.

[0111] It should be noted that H2 here refers to the distance between the clamping ring 12 and the upper end of the first limiting protrusion 132 after the user releases the valve body 11. When the user pulls out the valve body 11, the distance between the exhaust port of the exhaust hole 131 and the sealing valve core 112 can be greater than H2.

[0112] In some embodiments, the sealing valve core 112 is provided with a connected guide portion 112a and a sealing portion 112b. The guide portion 112a is a cylindrical structure with a diameter smaller than the diameter of the vent 131. The guide portion 112a is located closer to the vent 131 than the connecting portion, and serves to guide the engagement of the sealing valve core 112 with the vent 131. The sealing portion 112b is a tapered structure, with the cross-sectional area of ​​the sealing portion 112b gradually increasing as it moves away from the guide portion 112a. In the sealed state, a portion of the sealing portion 112b can extend into the vent 131 to block it. By providing the sealing portion 112b with a tapered structure, when the pressure within the cooking container is excessive, the air pressure can push the sealing valve core 112 to open a certain range of the vent 131.

[0113] It should be noted that, in the exhaust state (when the retaining ring 12 abuts against the upper end of the first limiting protrusion 132), the distance H2 between the exhaust port of the exhaust hole 131 and the sealing valve core 112 is specifically the distance between the exhaust port of the exhaust hole 131 and the position where the sealing portion 112b can block the exhaust hole 131, and is roughly the distance between the exhaust port of the exhaust hole 131 and the middle of the sealing portion 112b. The specific setting can be based on actual conditions and is not limited in this embodiment.

[0114] like Figure 6 The figure shows the assembly of the valve body 11 and the retaining ring 12. The inner sidewall of the valve body 11 is provided with a retaining groove 113, which communicates with the valve cavity 111. Part of the retaining ring 12 is retained within the retaining groove 113. In some embodiments, the retaining ring 12 can be a retaining spring with a certain elastic force. The retaining ring 12 includes a retaining section 121 and connecting sections 122 connected to both sides of the retaining section 121. The connecting sections 122 are rod-shaped and retaining within the retaining groove 113. The retaining section 121 is a two-section arc-shaped structure arranged in opposition to each other, and the retaining section 121 engages with the exhaust pipe 13.

[0115] Please refer to Figure 2 and Figure 6 The connecting section 122 is provided with a hollow portion, allowing the valve cavity 111 to communicate with the external environment of the pressure-limiting valve 1. In the exhaust state, the gas in the cooking container is discharged into the valve cavity 111 through the exhaust hole 131, passes through the hollow portion of the connecting section 122, and is discharged outward through the cavity opening of the valve cavity 111.

[0116] In order to facilitate the user to press and lift the valve body 11, a guide surface is provided on the first limiting protrusion 132, and the clamping ring 12 can move along the guide surface, so that the user can operate the pressure limiting valve 1 with a little force. Figure 7 ,like Figure 7The figure shows a cross-sectional view of the exhaust pipe 13. Along the axial direction Y of the pressure limiting valve 1, the first limiting protrusion 132 has a first guide surface 132a and a second guide surface 132b. Figure 2 and Figure 3 When the valve body 11 is lifted, the first guide surface 132a can guide the snap ring 12 to move above the first limiting protrusion 132 to open the exhaust hole 131. When the valve body 11 is pressed, the second guide surface 132b can guide the snap ring 12 to move below the first limiting protrusion 132 to close the exhaust hole 131.

[0117] In this embodiment, the first guide surface 132a and the second guide surface 132b guide the movement of the retaining ring 12 relative to the exhaust pipe 13. Specifically, when the user lifts the valve body 11, the retaining ring 12 moves upward along the first guide surface 132a, gradually passing over the first limiting protrusion 132 and moving above the first limiting protrusion 132, facilitating the user's lifting of the valve body 11 to vent the cooking container. When the user presses the valve body 11, the retaining ring 12 moves downward along the second guide surface 132b, gradually passing over the first limiting protrusion 132 and moving below the first limiting protrusion 132, facilitating the user's pressing of the valve body 11 to pressurize the cooking container.

[0118] In addition, in this embodiment, the first guide surface 132 a and the second guide surface 132 b are provided to reduce the loss caused by the elastic deformation of the snap ring 12 , thereby extending the service life of the snap ring 12 .

[0119] Please continue to refer to Figure 7 In some embodiments, the first guide surface 132a and the second guide surface 132b can both be inclined surfaces, wherein the first guide surface 132a is inclined in a direction away from the sealing valve core 112, and the second guide surface 132b is inclined in a direction facing the sealing valve core 112.

[0120] Specifically, the inclination angle α of the first guide surface 132a is 45°≤α≤50°. For example, the inclination angle α of the first guide surface 132a can be 45°, 46°, 47°, 48°, 49°, 50°, etc., and can be set according to actual conditions, and this embodiment is not limited thereto.

[0121] In this embodiment, if α is too large (such as α>50°), the slope of the first guide surface 132a is relatively flat. When venting the cooking container, the user needs to use a large force to pull up the valve body 11 so that the clamping ring 12 passes over the first limiting protrusion 132, which can easily cause elastic deformation of the clamping ring 12, resulting in an increase in the maximum width of the inner ring of the clamping ring 12, thereby affecting the limiting effect of the clamping ring 12.

[0122] If α is too small (e.g., α < 45°), the slope of the first guide surface 132a is steep. When the air pressure in the cooking container is high, the valve body 11 is likely to drive the retaining ring 12 along the first guide surface 132a to pass over the first limiting protrusion 132 under the push of the air pressure, causing the pressure limiting valve 1 to directly exhaust air, thereby affecting the cooking effect of the cooking container.

[0123] Therefore, when the inclination angle α of the first guide surface 132 a satisfies 45°≤α≤50°, the first limiting protrusion 132 is ensured to have a good limiting effect while being convenient for user operation.

[0124] The inclination angle β of the second guide surface 132b is 45°≤β≤50°. For example, the inclination angle β of the second guide surface 132b can be 45°, 46°, 47°, 48°, 49°, 50°, etc., and can be set according to actual conditions, and is not limited in this embodiment.

[0125] In this embodiment, if β is too large (such as β>50°), the slope of the second guide surface 132b is relatively flat, and the user needs to press the valve body 11 with greater force to make the clamping ring 12 pass over the first limiting protrusion 132, which can easily cause elastic deformation of the clamping ring 12, resulting in an increase in the maximum width of the inner ring of the clamping ring 12, affecting the limiting effect of the clamping ring 12.

[0126] If β is too small (such as β < 45°), the slope of the second guide surface 132b is steeper, which may easily cause the valve body 11 to move downward along the second guide surface 132b under the action of its own gravity and pass over the first limiting protrusion 132, making it impossible to maintain the pressure limiting valve 1 in the exhaust state, affecting the exhaust operation of the pressure limiting valve 1.

[0127] Therefore, when the inclination angle β of the second guide surface 132 b satisfies 45°≤β≤50°, it ensures that the first limiting protrusion 132 has a good limiting effect while facilitating user operation.

[0128] Alternatively, in some embodiments, both the first guide surface 132 a and the second guide surface 132 b may be arcuate surfaces, so as to guide the clamping ring 12 when it moves relative to the exhaust pipe 13 .

[0129] In some embodiments, the first position-limiting protrusion 132 may be an annular protrusion structure formed by a portion of the sidewall of the exhaust pipe 13 and protruding along the circumference of the pressure-limiting valve 1. Alternatively, the first position-limiting protrusion 132 may be a protrusion structure formed by a portion of the sidewall of the exhaust pipe 13 and protruding at intervals along the circumference of the pressure-limiting valve 1.

[0130] like Figure 8The figure shows a cross-sectional view of the pressure-limiting valve 1 in the exhaust state. A second limiting protrusion 133 is further provided on the outer wall of the exhaust pipe 13. Along the axial direction Y of the pressure-limiting valve 1, the second limiting protrusion 133 is located above the first limiting protrusion 132, with a certain distance between them. The second limiting protrusion 133 can prevent the valve body 11 from separating from the exhaust pipe 13. That is, in the exhaust state, the retaining ring 12 can be located in the area between the first limiting protrusion 132 and the second limiting protrusion 133.

[0131] In this embodiment, a second limiting protrusion 133 is provided to limit the separation of the valve body 11 and the exhaust pipe 13, thereby preventing the user from pulling out the valve body 11 with excessive force. When the pressure-limiting valve 1 is in the exhaust state, the valve body 11 and the exhaust pipe 13 are also in a matched state, reducing the risk of losing the valve body 11.

[0132] Please continue to refer to Figure 8 Along the radial direction X of the pressure-limiting valve 1, the maximum width of the first limiting protrusion 132 is less than or equal to the maximum width of the second limiting protrusion 133. In this embodiment, by limiting the maximum width of the second limiting protrusion 133 to be greater than the width of the first limiting protrusion 132, when the user lifts the valve body 11 with force, the clamping ring 12 can pass over the first limiting protrusion 132 but cannot pass over the second limiting protrusion 133, thereby reducing the risk of the valve body 11 being pulled out.

[0133] like Figure 9 Shown Figure 8 Please refer to the enlarged diagram of the middle D part. Figures 7 to 9 Along the axial direction Y of the pressure-limiting valve 1, a third guide surface 133a is provided on the end of the second limiting protrusion 133 that is away from the first limiting protrusion 132. The third guide surface 133a is capable of guiding one end of the exhaust pipe 13 through the retaining ring 12 and into the valve cavity 111. In this embodiment, the provision of the third guide surface 133a serves as a guide for the assembly of the exhaust pipe 13 and the retaining ring 12, facilitating quick installation of both.

[0134] The third guide surface 133a may be an inclined surface or a curved surface.

[0135] Please continue to refer to Figure 8 The second limiting protrusion 133 has a flat limiting surface 133b at one end thereof, proximal to the first limiting protrusion 132. In this embodiment, even if the user pulls up the valve body 11 too far, causing the retaining ring 12 to move to the uppermost end of the exhaust pipe 13, the retaining ring 12 will still abut against the flat limiting surface 133b, restricting further movement of the retaining ring 12 along the limiting surface 133b and thereby preventing the valve body 11 from separating from the exhaust pipe 13.

[0136] Please continue to refer to Figure 7The pressure limiting valve 1 further includes a sealing member 14. The exhaust pipe 13 is provided with a mounting groove 134. The sealing member 14 is installed in the mounting groove 134. The sealing member 14 is used to seal the connection position between the exhaust pipe 13 and the container cover to ensure the sealing of the connection between the exhaust pipe 13 and the container cover.

[0137] In some embodiments, the sealing member 14 may be a rubber ring.

[0138] The above description is merely a preferred embodiment of the present application and is not intended to limit the present application. Various modifications and variations are possible for those skilled in the art. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present application shall be included within the scope of protection of the present application.

Claims

1. A pressure limiting valve, characterized in that: The pressure limiting valve (1) comprises: A valve body (11), wherein the valve body (11) is provided with a valve cavity (111); a snap ring (12), the snap ring (12) being mounted on the valve chamber (111); an exhaust pipe (13), a portion of the exhaust pipe (13) being capable of extending into the valve cavity (111) and cooperating with the clamping ring (12), the exhaust pipe (13) having an exhaust hole (131), the exhaust hole (131) being in communication with the valve cavity (111), the valve body (11) and the clamping ring (12) being capable of moving relative to the exhaust pipe (13) to open or close the exhaust hole (131), so that the pressure limiting valve (1) is in an exhaust state or a sealing state; The outer side wall of the exhaust pipe (13) is provided with a first limiting protrusion (132), and the first limiting protrusion (132) is capable of abutting against the clamping ring (12); along the axial direction (Y) of the pressure limiting valve (1), the first limiting protrusion (132) has a first guide surface (132a) and a second guide surface (132b); When the valve body (11) is lifted, the first guide surface (132a) can guide the clamping ring (12) to move above the first limiting protrusion (132) to open the exhaust hole (131); when the valve body (11) is pressed, the second guide surface (132b) can guide the clamping ring (12) to move below the first limiting protrusion (132) to close the exhaust hole (131).

2. The pressure limiting valve according to claim 1, characterized in that The first guide surface (132a) and the second guide surface (132b) are both inclined surfaces; The inclination angle of the first guide surface (132a) is α, 45°≤α≤50°; The inclination angle of the second guide surface (132b) is β, 45°≤β≤50°.

3. The pressure limiting valve according to claim 1, characterized in that The first guide surface (132a) and the second guide surface (132b) are both arc surfaces.

4. The pressure limiting valve according to claim 1, characterized in that In the sealed state, along the axial direction (Y) of the pressure limiting valve (1), the distance between the clamping ring (12) and the maximum width of the first limiting protrusion (132) is H1, 1mm≤H1≤2mm.

5. The pressure limiting valve according to any one of claims 1 to 4, characterized in that: The outer side wall of the exhaust pipe (13) is further provided with a second limiting protrusion (133); Along the axial direction (Y) of the pressure limiting valve (1), the second limiting protrusion (133) is located above the first limiting protrusion (132), and the second limiting protrusion (133) can limit the valve body (11) from separating from the exhaust pipe (13).

6. The pressure limiting valve according to claim 5, characterized in that Along the radial direction (X) of the pressure-limiting valve (1), the maximum width of the first limiting protrusion (132) is less than or equal to the maximum width of the second limiting protrusion (133).

7. The pressure limiting valve according to claim 5, characterized in that A third guide surface (133a) is provided at one end of the second limiting protrusion (133) away from the first limiting protrusion (132); The third guide surface (133a) is an inclined surface or an arc surface, and the third guide surface (133a) can guide one end of the exhaust pipe (13) to pass through the clamping ring (12) and extend into the valve cavity (111).

8. The pressure limiting valve according to claim 5, characterized in that A limiting surface (133b) is provided at one end of the second limiting protrusion (133) close to the first limiting protrusion (132), and the limiting surface (133b) is a plane.

9. The pressure limiting valve according to any one of claims 1 to 4, characterized in that: The valve body (11) is provided with a sealing valve core (112) located in the valve cavity (111); in the sealing state, the sealing valve core (112) can block the exhaust hole (131); In the exhaust state, the distance between the exhaust port of the exhaust hole (131) and the sealing position of the sealing valve core (112) is H2, 2mm≤H2≤5mm.

10. A cooking container, characterized in that: The cooking container comprises: container body; a container cover, the container cover being capable of covering the container body; A pressure-limiting valve (1), wherein the pressure-limiting valve (1) is installed on the container body or the container cover, and the pressure-limiting valve (1) is the pressure-limiting valve (1) according to any one of claims 1 to 9.

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