Pressure limiting valve and cooking utensil

Abstract

The utility model provides a pressure-limiting valve and a cooking utensil, and the pressure-limiting valve comprises a valve body which is provided with an exhaust hole; the snap spring piece is arranged on the valve body, the snap spring piece comprises a plurality of convex clamping parts and a plurality of concave clamping parts which are distributed in the circumferential direction of the exhaust hole, and at least one concave clamping part is arranged between every two adjacent convex clamping parts; wherein the two convex clamping parts are oppositely arranged in the first direction, a fracture is formed in one convex clamping part, and the clamping spring piece is at least provided with one convex clamping part in the second direction which forms an included angle with the first direction. According to the technical scheme provided by the invention, the problem that the pressure limiting valve is easily separated from the exhaust pipe and falls off when the pot cover is inverted in the prior art can be solved.

Description

Technical Field

[0001] This utility model relates to the field of small household appliance technology, specifically to a pressure relief valve and a cooking appliance. Background Technology

[0002] As a highly efficient cooking appliance, the electric pressure cooker utilizes the principle that the boiling point of a liquid increases under higher pressure, enabling rapid stewing of food. One of its core components is the pressure-limiting valve, which is tightly connected to the exhaust pipe to ensure effective control of internal pressure during high-pressure cooking and rapid pressure release after cooking, ensuring safety and convenience.

[0003] In related technologies, the pressure relief valve is mainly fixed by using a two-corner snap-fit ​​method to connect with the exhaust pipe. Although this structure achieves the connection between the pressure relief valve and the exhaust pipe to a certain extent, some problems have been exposed in actual use. In particular, when the pot lid is upside down, the pressure relief valve is easy to detach from the exhaust pipe and fall off, which not only increases the difficulty of cleaning, but may also lead to component damage or safety accidents.

[0004] Therefore, the pressure relief valve fixing solution in the relevant technology is insufficient in terms of stability when the pot lid is inverted, and needs to be improved to enhance user experience and safety. Utility Model Content

[0005] This utility model provides a pressure limiting valve and a cooking appliance to solve the problem in related technologies that the pressure limiting valve is prone to detaching from the exhaust pipe and falling off when the pot lid is inverted.

[0006] According to one aspect of the present invention, a pressure limiting valve is provided, comprising: a valve body having a vent hole; and a retaining spring disposed on the valve body, the retaining spring comprising a plurality of outwardly protruding retaining portions and a plurality of inwardly concave retaining portions arranged circumferentially around the vent hole, wherein at least one inwardly concave retaining portion is disposed between two adjacent outwardly protruding retaining portions; wherein two outwardly protruding retaining portions are disposed opposite to each other in a first direction, one of the outwardly protruding retaining portions having a break, and in a second direction which is arranged at an angle to the first direction, the retaining spring is provided with at least one outwardly protruding retaining portion.

[0007] Applying the technical solution of this utility model, the pressure-limiting valve includes a valve body and a retaining spring, with the retaining spring disposed on the valve body. The retaining spring can engage with the valve body via a protruding engaging portion, achieving connection between the retaining spring and the valve body. The retaining spring can also engage with the exhaust pipe via a concave engaging portion, securing the pressure-limiting valve to the exhaust pipe. Because the two protruding engaging portions in the first direction are arranged opposite each other, with one of them having a break, and the retaining spring has at least one protruding engaging portion in the second direction (angled with the first direction), this structure provides the retaining spring with at least three protruding engaging portions, ensuring a secure assembly between the retaining spring and the valve body. Furthermore, when the retaining spring expands through the break, the protruding engaging portions in the second direction move outward, further strengthening the assembly between the retaining spring and the valve body. Furthermore, the aforementioned structure provides the retaining spring with at least three recessed engagement portions. Compared to the pressure relief valve in related technologies that uses a two-corner engagement method to connect with the exhaust pipe, this structure utilizes at least three recessed engagement portions to engage with the exhaust pipe. Even if one of the recessed engagement portions separates from the exhaust pipe, at least two more will remain engaged with it. Therefore, at least three recessed engagement portions enhance the assembly stability between the retaining spring and the exhaust pipe, thereby improving the stability of the pressure relief valve on the exhaust pipe and preventing it from detaching and falling off when the lid is inverted.

[0008] Furthermore, in the second direction, at least one protruding snap-fit ​​portion is provided on both sides of the snap-fit ​​member. The principle of this symmetrical design is to further improve the connection stability between the pressure relief valve and the exhaust pipe by increasing the number of snap-fit ​​points. The pressure relief valve can maintain a firm connection, significantly enhancing its resistance to falling off.

[0009] Furthermore, multiple protruding and concave locking portions are arranged at equal intervals around the circumference of the exhaust port; and / or, the retaining spring includes four protruding locking portions and four concave locking portions. The principle of equal spacing is to ensure uniform force distribution on the retaining spring within the exhaust port, avoiding connection failure caused by localized stress concentration. The design of four protruding and four concave locking portions not only provides sufficient connection strength but also simplifies the manufacturing and installation process of the retaining spring, reducing costs. The connection between the pressure relief valve and the exhaust pipe is more stable, while the manufacturing and installation process of the retaining spring is simpler.

[0010] Furthermore, the snap ring has a wire-like structure, which has the advantages of low cost and easy processing.

[0011] Furthermore, the outward-protruding locking part is a first arc-shaped structure that protrudes outward from the center, while the inward-concave locking part is a second arc-shaped structure that concave inward from the center. The connection between adjacent outward-protruding and inward-concave locking parts is smoothly transitioned. The principle of the arc design is to utilize the natural elasticity of the arc structure, ensuring smooth installation and disassembly of the spring clip through the smooth transition of the locking part, while providing stable locking force during use. The connection between the pressure relief valve and the exhaust pipe is more stable, the disassembly and assembly process is more convenient, and the arc structure also enhances the overall design aesthetics of the cooking appliance.

[0012] Furthermore, the valve body includes a valve seat body and a limiting seat. The valve seat body has a downward-facing countersunk hole, and the limiting seat is disposed within the countersunk hole. The limiting seat has an annular groove, and an outwardly protruding engaging portion extends into and engages with the annular groove. By separating the valve body into a valve seat body and a limiting seat, it is convenient to machine the structure for fixing the retaining spring on the limiting seat, which facilitates the machining of the annular groove, without affecting other designs of the valve seat body, such as the valve core.

[0013] Furthermore, the limiting seat includes an upper body and a lower body. The upper body has a cylindrical structure, and the lower body has an annular structure. The inner holes of the upper and lower bodies together form an exhaust port. The upper body includes a first cylindrical section and a second cylindrical section connected to the lower end of the first cylindrical section. The diameter of the second cylindrical section is larger than the diameter of the first cylindrical section. The lower body is disposed within the second cylindrical section, and there is a gap between the upper end face of the lower body and the lower end face of the first cylindrical section, forming an annular groove. Using the above structure, the limiting seat is divided into an upper body and a lower body, which facilitates the placement of the retaining spring within the annular groove formed by the gap between the lower and upper bodies.

[0014] Furthermore, the lower seat body includes a first ring segment and a second ring segment connected to the lower end of the first ring segment. The diameter of the first ring segment is larger than the diameter of the second ring segment. The lower end face of the first ring segment has an annular notch, a portion of the first ring segment extends into the annular notch, and the inner sidewall of the remaining first ring segment forms the circumferential sidewall of the annular groove. The upper end face of the second ring segment forms the bottom wall of the annular groove, and the lower end face of the first ring segment forms the top wall of the annular groove. And / or, the valve seat body includes a housing and a valve core. The valve core is disposed within the housing, and the upper seat body passes through the valve core. The lower end of the housing has an inwardly flanged edge, and the lower seat body rests on the inwardly flanged edge. Using the above structure ensures the machining and assembly accuracy of each component of the valve body, thereby preventing the pressure relief valve from detaching from the exhaust pipe and falling off when the pot lid is inverted.

[0015] According to another aspect of this utility model, a cooking utensil is provided, comprising: a pot body; a pot lid covering the pot body; an exhaust pipe extending through the pot lid; and a pressure limiting valve fitted onto the exhaust pipe, wherein the pressure limiting valve is the aforementioned pressure limiting valve. Therefore, this cooking utensil also improves the stability of the pressure limiting valve on the exhaust pipe, preventing the pressure limiting valve from detaching from the exhaust pipe and falling off when the pot lid is inverted.

[0016] Furthermore, the exhaust pipe includes a first pipe section and a second pipe section connected to the lower end of the first pipe section. The outer diameter of the first pipe section is larger than the outer diameter of the second pipe section. When the pressure relief valve is fitted onto the exhaust pipe, the concave locking part of the pressure relief valve can engage with the first pipe section, and the concave locking part of the pressure relief valve can be clearance-fitted with the second pipe section. The inner diameter of the circular hole formed by the multiple concave locking parts is R1, the outer diameter of the first pipe section is R2, and the difference between R2 and R1 is X, where 0.5mm ≤ X ≤ 0.9mm. By setting X within the above range, it is convenient to disassemble and assemble the pressure relief valve, and it also prevents the pressure relief valve from detaching from the exhaust pipe and falling off when the pot lid is inverted. Attached Figure Description

[0017] The accompanying drawings, which form part of this application, are used to provide a further understanding of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an undue limitation of the present invention. In the drawings:

[0018] Figure 1 An exploded view of the pressure relief valve and exhaust pipe provided in an embodiment of this utility model is shown;

[0019] Figure 2 A schematic diagram of the pressure relief valve provided in an embodiment of this utility model is shown;

[0020] Figure 3 This diagram shows a structural schematic of the pressure relief valve provided in an embodiment of the present invention from another perspective;

[0021] Figure 4 A cross-sectional view of the pressure relief valve provided in an embodiment of the present invention is shown;

[0022] Figure 5 An assembly cross-sectional view of the pressure relief valve and exhaust pipe provided in an embodiment of the present invention is shown;

[0023] Figure 6 A cross-sectional view of a cooking appliance (pot body not shown) provided in an embodiment of the present invention is shown;

[0024] Figure 7 It shows Figure 6 A magnified view of a portion of point A in the middle.

[0025] The above figures include the following reference numerals:

[0026] 10. Valve body; 11. Exhaust port; 12. Valve seat body; 122. Outer shell; 1221. Inner flange; 123. Valve core; 13. Limit seat; 131. Annular groove; 132. Upper seat body; 1321. First cylindrical section; 1322. Second cylindrical section; 133. Lower seat body; 1331. First annular section; 1332. Second annular section;

[0027] 20. Snap ring; 21. Outwardly protruding snap-fit ​​part; 22. Inwardly concave snap-fit ​​part; 23. Break;

[0028] 30. Pot lid;

[0029] 40. Exhaust pipe; 41. First pipe section; 42. Second pipe section;

[0030] R1 is the inner diameter of the circular hole formed by multiple concave snap-fit ​​parts; R2 is the outer diameter of the first pipe section. Detailed Implementation

[0031] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. The following description of at least one exemplary embodiment is merely illustrative and is in no way intended to limit the present utility model or its application or use. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the scope of protection of the present utility model.

[0032] like Figures 1 to 7 As shown, this embodiment of the present invention provides a pressure limiting valve, which includes a valve body 10 and a retaining spring 20. The valve body 10 has a vent hole 11. The retaining spring 20 is disposed on the valve body 10 and includes a plurality of outwardly protruding engaging portions 21 and a plurality of inwardly concave engaging portions 22 arranged circumferentially around the vent hole 11. At least one inwardly concave engaging portion 22 is provided between two adjacent outwardly protruding engaging portions 21. Specifically, two outwardly protruding engaging portions 21 are arranged opposite each other in a first direction, and one of the outwardly protruding engaging portions 21 is provided with a break 23 (to give the retaining spring 20 an elastic range of motion). In a second direction that is angled to the first direction, the retaining spring 20 is provided with at least one outwardly protruding engaging portion 21.

[0033] Using the pressure-limiting valve provided in this embodiment, the retaining spring 20 can engage with the valve body 10 via the protruding engaging portion 21, thus connecting the retaining spring 20 to the valve body 10. The retaining spring 20 can also engage with the exhaust pipe 40 via the concave engaging portion 22, thus fixing the pressure-limiting valve to the exhaust pipe 40. Since the two protruding engaging portions 21 in the first direction are arranged opposite each other, and one of the protruding engaging portions 21 has a break 23, and in the second direction, which is angled to the first direction, the retaining spring 20 has at least one protruding engaging portion 21, this structure ensures that the retaining spring 20 has at least three protruding engaging portions 21, guaranteeing the secure assembly of the retaining spring 20 and the valve body 10. Furthermore, when the retaining spring 20 expands through the break 23, the protruding engaging portion 21 in the second direction moves outward, further strengthening the assembly of the retaining spring 20 and the valve body 10. Furthermore, the aforementioned structure provides the retaining spring 20 with at least three recessed engaging portions 22. Compared to the related technology where the pressure relief valve is connected to the exhaust pipe 40 via a two-corner engaging method, the retaining spring 20 utilizes at least three recessed engaging portions 22 to engage with the exhaust pipe 40. Even if one of the recessed engaging portions 22 separates from the exhaust pipe 40, at least two more recessed engaging portions 22 will remain engaged with the exhaust pipe 40. Therefore, at least three recessed engaging portions 22 can improve the assembly firmness between the retaining spring 20 and the exhaust pipe 40, thereby improving the firmness of the pressure relief valve on the exhaust pipe 40 and preventing the pressure relief valve from detaching from the exhaust pipe 40 and falling off when the lid is inverted.

[0034] It should be noted that the snap ring 20 includes multiple outwardly protruding snap-fit ​​parts 21 and multiple inwardly concave snap-fit ​​parts 22 arranged circumferentially around the vent hole 11. "Multiple" refers to three or more, such as three, four, five, or six, as long as the above assembly structure can be met.

[0035] The retaining spring 20 is disposed on the valve body 10 and includes the following two structures: the first is that the retaining spring 20 is disposed inside the vent hole 11 of the valve body 10, and the second is that the retaining spring 20 is disposed at the bottom of the valve body 10, and the concave engaging portion 22 covers the edge area of ​​the vent hole 11. In this embodiment, the retaining spring 20 is disposed inside the vent hole 11 of the valve body 10.

[0036] Furthermore, by adopting the above structure, since the inner and outer sides of the snap ring 20 are connected to the valve body 10 and the exhaust pipe 40 by snap-fit, it can improve the assembly firmness and also has the advantage of being easy for users to manually disassemble, making it convenient for disassembly and cleaning.

[0037] It should be noted that in this embodiment, the inner and outer directions are the radial directions of the exhaust hole 11, where inner refers to the direction close to the center of the exhaust hole 11 in the radial direction, and outer refers to the direction away from the center of the exhaust hole 11 in the radial direction.

[0038] In this embodiment, in the second direction, at least one protruding snap-fit ​​portion 21 is provided on both sides of the snap-fit ​​member 20. The principle of this symmetrical design is to further improve the connection stability between the pressure relief valve and the exhaust pipe 40 by increasing the number of snap-fit ​​points. The pressure relief valve can maintain a firm connection state, which significantly enhances the pressure relief valve's resistance to falling off.

[0039] In this embodiment, multiple protruding snap-fit ​​parts 21 and multiple concave snap-fit ​​parts 22 are arranged at equal intervals around the vent hole 11. The principle of the equal interval arrangement is to ensure that the snap spring 20 is subjected to uniform force in the vent hole 11, and to avoid connection failure caused by local stress concentration.

[0040] Specifically, the retaining ring 20 includes four protruding engaging portions 21 and four concave engaging portions 22. The design of the four protruding engaging portions 21 and four concave engaging portions 22 not only provides sufficient connection strength but also simplifies the manufacturing and installation process of the retaining ring 20, reducing costs. The connection between the pressure relief valve and the exhaust pipe 40 is more stable, while the manufacturing and installation process of the retaining ring 20 is simpler.

[0041] In this embodiment, the retaining spring 20 has a filament structure, which has the advantages of low cost and easy processing.

[0042] Specifically, the retaining spring 20 is a wire-like structure made of metal. Utilizing the elasticity of the metal wire, it forms a retaining spring 20 with both elasticity and locking function. This design not only ensures the elasticity of the retaining spring 20 but also improves its durability under high-temperature environments. The connection between the pressure relief valve and the exhaust pipe 40 is more reliable, and even during prolonged high-temperature cooking, the retaining spring 20 maintains good elasticity, preventing it from falling off.

[0043] like Figure 1 As shown, the outwardly convex locking part 21 is a first arc-shaped structure protruding outward from the center, and the inwardly concave locking part 22 is a second arc-shaped structure concave inward from the center. The connection between adjacent outwardly convex locking parts 21 and inwardly concave locking parts 22 is smooth transition. The principle of the arc design is to utilize the natural elasticity of the arc structure, and through the smooth transition of the locking part, ensure the smoothness of the snap spring 20 during installation and disassembly, while providing a stable locking force during use. The connection between the pressure relief valve and the exhaust pipe 40 is more stable, the disassembly and assembly process is more convenient, and the arc structure also enhances the overall design aesthetics of the cooking appliance.

[0044] like Figure 1 and Figure 4As shown, the valve body 10 includes a valve seat body 12 and a limiting seat 13. The valve seat body 12 has a downward-facing countersunk hole, and the limiting seat 13 is disposed within the countersunk hole. The limiting seat 13 has an annular groove 131, and the protruding engaging portion 21 extends into the annular groove 131 and engages with it. By separating the valve body 10 into a valve seat body 12 and a limiting seat 13, it is convenient to machine the structure for fixing the retaining spring 20 on the limiting seat 13, which facilitates the machining of the annular groove 131 without affecting other designs of the valve seat body 12, such as the valve core.

[0045] Furthermore, the combination of the valve seat body 12 and the limiting seat 13 forms a stable locking platform, ensuring the correct position of the retaining spring 20 within the pressure relief valve and preventing it from shifting or falling off during use. This results in a more robust pressure relief valve structure, simpler installation and removal of the retaining spring, and improved airtightness, ensuring safety during cooking.

[0046] like Figure 1 and Figure 4 As shown, the limiting seat 13 includes an upper seat 132 and a lower seat 133. The upper seat 132 has a cylindrical structure, and the lower seat 133 has an annular structure. The inner holes of the upper seat 132 and the lower seat 133 together form an exhaust hole 11. The upper seat 132 includes a first cylindrical section 1321 and a second cylindrical section 1322 connected to the lower end of the first cylindrical section 1321. The diameter of the second cylindrical section 1322 is larger than the diameter of the first cylindrical section 1321. The lower seat 133 is disposed within the second cylindrical section 1322. There is a gap between the upper end face of the lower seat 133 and the lower end face of the first cylindrical section 1321, forming an annular groove 131. With the above structure, the limiting seat 13 is divided into an upper seat 132 and a lower seat 133, which facilitates the placement of the retaining spring 20 within the annular groove 131 formed by the gap between the lower seat 133 and the upper seat 132.

[0047] like Figure 1 and Figure 4As shown, the lower seat 133 includes a first annular segment 1331 and a second annular segment 1332 connected to the lower end of the first annular segment 1331. The aperture of the first annular segment 1331 is larger than the aperture of the second annular segment 1332. The lower end face of the first cylindrical segment 1321 has an annular notch. Part of the first annular segment 1331 extends into the annular notch, and the inner sidewall of the remaining first annular segment 1331 forms the circumferential sidewall of the annular groove 131. The upper end face of the second annular segment 1332 forms the bottom wall of the annular groove 131, and the lower end face of the first cylindrical segment 1321 forms the top wall of the annular groove 131. The valve seat 12 includes a housing 122 and a valve core 123. The valve core 123 is disposed inside the housing 122, and the upper seat 132 passes through the valve core 123. The lower end of the housing 122 has an inward flange 1221, and the lower seat 133 rests on the inward flange 1221. The above structure ensures the machining and assembly accuracy of each component of the valve body 10, thereby preventing the pressure relief valve from detaching from the exhaust pipe 40 and falling off when the pot lid is inverted.

[0048] like Figure 6 and Figure 7 As shown, another embodiment of this utility model provides a cooking appliance, which includes a pot body, a pot lid 30, a vent pipe 40, and a pressure limiting valve. The pot lid 30 is placed on the pot body, the vent pipe 40 passes through the pot lid 30, and the pressure limiting valve is sleeved on the vent pipe 40. The pressure limiting valve is the one provided above. Therefore, this cooking appliance can also improve the firmness of the pressure limiting valve on the vent pipe 40, preventing the pressure limiting valve from detaching from the vent pipe 40 and falling off when the pot lid is inverted.

[0049] like Figure 1 and Figure 7 As shown, the exhaust pipe 40 includes a first pipe section 41 and a second pipe section 42 connected to the lower end of the first pipe section 41. The outer diameter of the first pipe section 41 is larger than the outer diameter of the second pipe section 42. When the pressure relief valve is fitted onto the exhaust pipe 40, the concave locking part 22 of the pressure relief valve can engage with the first pipe section 41, and the concave locking part 22 of the pressure relief valve is in clearance fit with the second pipe section 42. The inner diameter of the circular hole formed by the multiple concave locking parts 22 is R1, the outer diameter of the first pipe section 41 is R2, and the difference between R2 and R1 is X, where 0.5mm ≤ X ≤ 0.9mm. By setting X within the above range, it is convenient to disassemble and assemble the pressure relief valve, and it also prevents the pressure relief valve from detaching from the exhaust pipe 40 and falling off when the pot lid is inverted.

[0050] Where X can be 0.5mm, 0.6mm, 0.7mm, 0.8mm, 0.9mm, or other values ​​between 0.5mm and 0.9mm.

[0051] In this embodiment, X is 0.7mm, that is, the single-sided limiting amount of the retaining spring 20 and the exhaust pipe 40 is 0.35mm.

[0052] Furthermore, by using the different outer diameters of the first pipe section 41 and the second pipe section 42, and the snap-fit ​​of the concave snap-fit ​​part 22 of the pressure relief valve with the first pipe section 41, the stable position of the pressure relief valve on the exhaust pipe 40 is ensured. At the same time, by using the clearance fit with the second pipe section 42, the pressure relief valve can float on the exhaust pipe 40 to achieve pressure relief.

[0053] Cooking appliances include, but are not limited to, electric pressure cookers and multi-functional cookers with pressure cooking functions.

[0054] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0055] Unless otherwise specifically stated, the relative arrangement, numerical expressions, and values ​​of the components and steps described in these embodiments do not limit the scope of this invention. It should also be understood that, for ease of description, the dimensions of the various parts shown in the drawings are not drawn to actual scale. Techniques, methods, and devices known to those skilled in the art may not be discussed in detail, but where appropriate, such techniques, methods, and devices should be considered part of the specification. In all examples shown and discussed herein, any specific values ​​should be interpreted as exemplary only and not as limitations. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters in the following drawings denote similar items; therefore, once an item is defined in one drawing, it need not be further discussed in subsequent drawings.

[0056] In the description of this utility model, it should be understood that the directional terms such as "front, back, up, down, left, right", "horizontal, vertical, horizontal" and "top, bottom" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description. Unless otherwise stated, these directional terms do not indicate or imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on the scope of protection of this utility model. The directional terms "inner" and "outer" refer to the inner and outer contours of each component itself.

[0057] For ease of description, spatial relative terms such as "above," "on top of," "on the upper surface of," "above," etc., are used herein to describe the spatial positional relationship of a device or feature as shown in the figures to other devices or features. It should be understood that spatial relative terms are intended to encompass different orientations in use or operation beyond the orientation of the device as described in the figures. For example, if the device in the figures were inverted, a device described as "above" or "on top of" other devices or structures would subsequently be positioned as "below" or "under" other devices or structures. Thus, the exemplary term "above" can include both "above" and "below." The device may also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatial relative descriptions used herein will be interpreted accordingly.

[0058] Furthermore, it should be noted that the use of terms such as "first" and "second" to define components is merely for the purpose of distinguishing the corresponding components. Unless otherwise stated, the above terms have no special meaning and therefore should not be construed as limiting the scope of protection of this utility model.

[0059] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A pressure relief valve, characterized in that, The pressure relief valve includes: The valve body (10) has an exhaust port (11); A retaining spring (20) is disposed on the valve body (10). The retaining spring (20) includes a plurality of outwardly protruding retaining portions (21) and a plurality of inwardly concave retaining portions (22) arranged circumferentially around the exhaust hole (11). At least one inwardly concave retaining portion (22) is disposed between two adjacent outwardly protruding retaining portions (21). In the first direction, the two protruding snap-fit ​​portions (21) are arranged opposite to each other, and one of the protruding snap-fit ​​portions (21) is provided with a break (23). In the second direction, which is set at an angle to the first direction, the snap spring member (20) is provided with at least one of the protruding snap-fit ​​portions (21).

2. The pressure relief valve according to claim 1, characterized in that, In the second direction, at least one of the protruding snap-fit ​​portions (21) is provided on both sides of the snap ring (20).

3. The pressure relief valve according to claim 1, characterized in that, The plurality of the protruding snap-fit ​​portions (21) and the plurality of the concave snap-fit ​​portions (22) are all arranged at equal intervals around the vent hole (11) in the circumferential direction; and / or, The retaining ring (20) includes four protruding retaining portions (21) and four concave retaining portions (22).

4. The pressure relief valve according to claim 1, characterized in that, The retaining ring (20) has a filamentous structure.

5. The pressure relief valve according to claim 4, characterized in that, The convex snap-fit ​​part (21) is a first arc-shaped structure that protrudes outward from the center, and the concave snap-fit ​​part (22) is a second arc-shaped structure that is concave inward from the center. The connection between adjacent convex snap-fit ​​parts (21) and concave snap-fit ​​parts (22) is a smooth transition.

6. The pressure relief valve according to any one of claims 1 to 5, characterized in that, The valve body (10) includes a valve seat body (12) and a limiting seat (13). The valve seat body (12) has a downward-facing countersunk hole. The limiting seat (13) is disposed in the countersunk hole. The limiting seat (13) has an annular groove (131). The protruding snap-fit ​​part (21) extends into the annular groove (131) and engages with the annular groove (131).

7. The pressure relief valve according to claim 6, characterized in that, The limiting seat (13) includes an upper seat (132) and a lower seat (133). The upper seat (132) is a cylindrical structure, and the lower seat (133) is an annular structure. The inner holes of the upper seat (132) and the lower seat (133) together form the exhaust hole (11). The upper seat (132) includes a first cylindrical section (1321) and a second cylindrical section (1322) connected to the lower end of the first cylindrical section (1321). The aperture of the second cylindrical section (1322) is larger than the aperture of the first cylindrical section (1321). The lower seat (133) is disposed inside the second cylindrical section (1322). There is a gap between the upper end face of the lower seat (133) and the lower end face of the first cylindrical section (1321). The gap forms the annular groove (131).

8. The pressure relief valve according to claim 7, characterized in that, The lower seat (133) includes a first ring segment (1331) and a second ring segment (1332) connected to the lower end of the first ring segment (1331). The aperture of the first ring segment (1331) is larger than the aperture of the second ring segment (1332). The lower end face of the first cylindrical segment (1321) has an annular notch. A portion of the first ring segment (1331) extends into the annular notch, and the inner sidewall of the remaining first ring segment (1331) forms the circumferential sidewall of the annular groove (131). The upper end face of the second ring segment (1332) forms the bottom wall of the annular groove (131), and the lower end face of the first cylindrical segment (1321) forms the top wall of the annular groove (131); and / or, The valve seat body (12) includes a housing (122) and a valve core (123). The valve core (123) is disposed inside the housing (122). The upper seat body (132) passes through the valve core (123). The lower end of the housing (122) has an inner flange (1221), and the lower seat body (133) rests on the inner flange (1221).

9. A cooking utensil, characterized in that, The cooking appliance includes: Pot body; A lid (30) is placed on the pot body; An exhaust pipe (40) is installed on the pot lid (30); A pressure relief valve is sleeved on the exhaust pipe (40), and the pressure relief valve is the pressure relief valve according to any one of claims 1 to 8.

10. The cooking utensil according to claim 9, characterized in that, The exhaust pipe (40) includes a first pipe section (41) and a second pipe section (42) connected to the lower end of the first pipe section (41). The outer diameter of the first pipe section (41) is larger than the outer diameter of the second pipe section (42). When the pressure relief valve is sleeved on the exhaust pipe (40), the concave snap-fit ​​part (22) of the pressure relief valve can snap-fit ​​with the first pipe section (41), and the concave snap-fit ​​part (22) of the pressure relief valve is clearance-fitted with the second pipe section (42). The inner diameter of the circular hole formed by the plurality of concave snap-fit ​​parts (22) is R1, the outer diameter of the first pipe section (41) is R2, and the difference between R2 and R1 is X, where 0.5mm≤X≤0.9mm.

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