Pressure relief valve and cooking utensil

Abstract

The present application provides a pressure relief valve and a cooking utensil, wherein the pressure relief valve comprises a valve body and a valve seat, wherein the valve body comprises a valve cap and a valve stem, wherein the valve cap has a receiving cavity, wherein the valve stem is installed in the receiving cavity and can move relative to the valve cap. The valve stem is detachably installed on the valve seat with the valve cap, wherein the valve seat has an exhaust passage, and the valve stem can close or open the exhaust passage. The connection between the valve stem and the valve cap facilitates the installation and removal of the valve body, and facilitates the cleaning of the valve body and the valve seat.

Description

Technical Field

[0001] The present application relates to the technical field of cooking utensils, and in particular to a pressure relief valve and a cooking utensil. Background Art

[0002] Pressure cookers are common cooking appliances. Their principle is to use the physical phenomenon that the boiling point of liquids increases under high pressure, so that the water in the pressure cooker can boil at a higher temperature, thereby accelerating the cooking of food. The pressure relief valve is a key component of the pressure cooker, and its main function is to control the pressure in the pressure cooker. The gas in the pressure cooker needs to be discharged from the pressure relief valve. The water vapor and food in the pot may be transported with the gas and remain inside the pressure relief valve, which may easily cause the pressure relief valve to malfunction. Therefore, the inside of the pressure relief valve needs to be cleaned. The current pressure valve is cumbersome to disassemble and install, making it very inconvenient to clean the pressure valve. Utility Model Content

[0003] In view of this, the present application provides a pressure relief valve and a cooking utensil to solve the problem of inconvenient cleaning of the pressure relief valve in the prior art.

[0004] The present application provides a pressure relief valve, the pressure relief valve comprising:

[0005] A valve body, the valve body comprising a valve bonnet and a valve stem, the valve bonnet having a receiving cavity, the valve stem being mounted in the receiving cavity and being able to move relative to the valve bonnet;

[0006] Valve seat;

[0007] The valve stem is detachably mounted on the valve seat together with the valve cap, the valve seat has an exhaust passage, and the valve stem can move along the accommodating cavity relative to the valve cap to close or open the exhaust passage.

[0008] The pressure relief valve is installed on the cover of a container such as a pressure cooker to control the pressure inside the cooker. The valve seat is installed on the cover, and the exhaust channel set on the valve seat is used to connect the inside of the container with the outside world to achieve the exhaust and pressure reduction function. The valve body is detachably installed on the valve seat. The accommodating cavity limits and guides the valve stem, improving the stability of the valve stem movement. When the valve body closes the exhaust channel, the inside of the container is no longer connected to the outside world, which facilitates the increase of the gas pressure inside the container. When the valve body opens the exhaust channel, the inside of the container is connected to the outside world, which facilitates the reduction of the gas pressure inside the container.

[0009] With the use of the pressure relief valve, foreign matter discharged along with the gas in the container may accumulate inside the exhaust channel, such as water vapor, grease, and food residues, which eventually cause the exhaust channel to be blocked, affecting the normal operation of the pressure relief valve. Therefore, the pressure relief valve needs to be cleaned in time. Cleaning the pressure relief valve requires disassembling the pressure relief valve and reinstalling it after cleaning. The current pressure relief valve has a complex internal structure. After the housing of the pressure relief valve is disassembled, there are many other parts inside the exhaust path, which need to be disassembled separately again and reinstalled in sequence after cleaning, resulting in cumbersome disassembly and installation steps, making it inconvenient to clean the pressure relief valve. In the pressure relief valve provided in the embodiment of the present application, the valve stem and the valve bonnet are designed to be interconnected. When the operator disassembles the valve body, the valve stem will not be detached from the valve bonnet, and the valve stem can be disassembled together with the valve bonnet. After the valve body is disassembled, there are no other parts inside the exhaust channel, which is convenient for cleaning the valve seat. After cleaning, the operator can install the valve stem and the valve bonnet on the valve body again, and the installation steps are simple. Therefore, the pressure relief valve provided in the embodiment of the present application is easy to clean.

[0010] In a possible implementation, the inner wall of the accommodating cavity has a first limiting portion, and the end of the valve stem away from the valve seat has a second limiting portion, and the second limiting portion can abut against the first limiting portion.

[0011] The first limiting portion and the second limiting portion cooperate with each other to limit the movement range of the valve stem, so that the valve stem can move in the accommodating cavity to realize the opening and closing functions of the exhaust channel, and the valve stem will not be separated from the accommodating cavity, so that the valve stem can remain connected with the valve cap, which is convenient for the disassembly and installation of the valve body.

[0012] In a possible implementation manner, an outer wall of the valve seat has a first thread, an inner wall of the valve cap has a second thread, and the valve cap and the valve seat are connected via the first thread and the second thread.

[0013] The valve cap is sleeve-installed on the top of the valve seat, and the two are connected by threads, thereby finally realizing the connection between the valve body and the valve seat. The threads are stable and reliable. The user can complete the installation and disassembly of the valve body by rotating the valve cap. The operation is convenient and simple, and it is easy to clean the pressure relief valve.

[0014] In a possible implementation, the pressure relief valve includes a limit member, which is located at one end of the valve seat away from the valve body and connected to the valve seat, and the valve seat has a protrusion, which extends radially along the pressure relief valve to form a clamping groove between the limit member and the protrusion for connecting the cover body.

[0015] The stopper is connected to the part of the valve body that passes through the cover body. The stopper is arranged at the end of the valve seat away from the valve body. When the stopper and the valve seat are connected, the stopper is located at the bottom of the cover body, and the raised part is located at the top of the cover body. The clamping groove formed by the two can be clamped with the cover body. The stopper can be set as an annular shape and sleeved on the valve seat. The valve seat and the stopper can be connected by threads, which is convenient for installation and disassembly.

[0016] In a possible implementation manner, the valve body includes an elastic member, one end of the elastic member is connected to the valve cap, and the other end of the elastic member is connected to the valve stem.

[0017] When the valve stem moves, the elastic member can undergo elastic deformation along with the movement of the valve stem. The elastic member can exert a thrust on the valve stem, causing the valve stem to move in a direction close to the air inlet. When the pressure in the pot body is relatively low, the valve stem no longer needs to rely solely on its own gravity to seal the air inlet. Under the action of the elastic member, the valve stem can be subjected to the thrust of the elastic member, thereby achieving a more stable sealing effect. The elastic force provided by the elastic member enables the valve stem to achieve a good sealing function even when its own mass is relatively low, which is beneficial to reducing the mass of the valve stem, and different pressure control effects can be achieved by setting elastic members of different specifications. When the pressure in the pot body is relatively high, the valve stem can move in a direction away from the air inlet and compress the elastic member. The elastic member can buffer and stabilize the movement of the valve stem.

[0018] In a possible implementation manner, the exhaust passage has an air inlet and an air outlet, the air inlet is located on the bottom wall of the valve seat, and the air outlet is located on the side wall of the valve seat;

[0019] The valve stem includes a main body and a sealing portion. The main body is located in the accommodating cavity and at least partially can extend into the exhaust channel. The sealing portion is connected to one end of the main body close to the valve seat and is used to close or open the air inlet hole. The sealing portion is made of ceramic.

[0020] The air inlet is connected to the inside of the pot body, so that the gas inside the pot body can enter the valve seat from the air inlet through the cover body and be discharged to the outside from the air outlet, thereby realizing the pressure relief function. When the pressure inside the pot body is low, the valve stem will fall and close the air inlet, thereby increasing the pressure inside the pot body. When the pressure inside the pot body is high, the air pressure will push the valve stem to move along the axis direction of the pressure relief valve to open the air inlet, and the gas inside the pot body can enter the exhaust channel from the air inlet and be discharged from the air outlet, thereby reducing the pressure inside the pot body.

[0021] The main body can move along the inner wall of the accommodating cavity, that is, along the axial direction of the pressure relief valve. The end of the main body has a sealing part, and the sealing part can move with the main body. The sealing part is used to close the air inlet hole, so that the gas in the pot body cannot enter the exhaust channel from the air inlet hole and be discharged from the air outlet hole, so as to maintain a higher pressure in the pot body. When the main body moves in the direction close to the air inlet hole so that the sealing part abuts against the valve seat, the sealing part can achieve a good sealing effect on the air inlet hole. The material of the sealing part is ceramic material. The ceramic material is resistant to high temperature and pollution-free, suitable for cooking containers, and the ceramic material is more corrosion-resistant than the metal material, and the ceramic material has a cost advantage over the metal material.

[0022] In a possible implementation manner, one end of the main body portion close to the valve seat has a recessed portion, the sealing portion is installed in the recessed portion, and the sealing portion is spherical.

[0023] The end of the main body is provided with a recessed portion adapted to the shape of the sealing portion. The sealing portion is connected to the main body by interference fit. The assembly and connection operation is convenient, the mechanical connection installation is pollution-free, and the sealing portion is not easily separated from the valve stem.

[0024] The sealing part is spherical, and the cross-sectional areas of the sealing part at different positions along the axial direction of the pressure relief valve are different. When the sealing part closes the air inlet, the part with a smaller cross-sectional area of ​​the sealing part can extend into the air inlet to play a guiding role, while the part with a larger cross-sectional area can abut against the inner wall of the air inlet to form an interference fit, thereby achieving a sealing effect on the air inlet. The sealing part provided in the present application is spherical, and even if a certain deviation occurs during the installation of the valve stem, the sealing part can still fall into the air inlet and return to the central position, achieving an interference fit with the air inlet and achieving a sealing effect. Therefore, the sealing part has the functions of centering and deviation correction.

[0025] In a possible implementation manner, the valve seat has a sealing member, and the sealing member is installed on a side of the protruding portion close to the limiting member.

[0026] The sealing member is made of elastic material and is located between the raised portion and the cover body. When the valve seat is installed on the cover body, the sealing member fits tightly with the cover body to achieve a good sealing effect.

[0027] In a possible implementation manner, the valve body has a lug, the lug is located on an outer wall of the valve body, and the lug protrudes along a radial direction of the pressure relief valve.

[0028] When installing and removing the valve body, the valve body needs to be rotated relative to the valve seat. The valve body of this embodiment has a lug, and the operator can use the lug to exert force on the valve body to rotate the valve body.

[0029] The present application provides a cooking utensil, comprising a cover body and a pressure relief valve, wherein the pressure relief valve is the pressure relief valve described in any one of the above embodiments, and the pressure relief valve is installed on the cover body.

[0030] The present application provides a pressure relief valve and a cooking utensil, wherein the pressure relief valve comprises a valve body and a valve seat, wherein the valve body comprises a valve cap and a valve stem, wherein the valve cap has a receiving cavity, and the valve stem is installed in the receiving cavity and can move relative to the valve cap. The valve stem is detachably installed on the valve seat with the valve cap, and the valve seat has an exhaust passage, and the valve stem can close or open the exhaust passage. The valve stem and the valve cap are connected, so that the installation and disassembly operations of the valve body are convenient, and the valve body and the valve seat can be cleaned conveniently. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] 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 described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0032] Figure 1 A cross-sectional view of a pressure relief valve in a closed state provided in an embodiment of the present application;

[0033] Figure 2 A cross-sectional view of the pressure relief valve in an open state provided in an embodiment of the present application;

[0034] Figure 3 A cross-sectional view of a valve seat provided in an embodiment of the present application;

[0035] Figure 4 A cross-sectional view of a valve body provided in an embodiment of the present application;

[0036] Figure 5 An exploded view of a valve body provided in an embodiment of the present application;

[0037] Figure 6 A schematic structural diagram of the valve body from another perspective provided in an embodiment of the present application.

[0038] Description of reference numerals:

[0039] 1- Valve body;

[0040] 11-valve bonnet;

[0041] 111-accommodating chamber;

[0042] 111a-first limiting portion;

[0043] 112- second thread;

[0044] 113 - lug;

[0045] 12-valve stem;

[0046] 121-main body;

[0047] 122- sealing part;

[0048] 123-depression;

[0049] 124- second limiting portion;

[0050] 13- elastic member;

[0051] 2-valve seat;

[0052] 21-exhaust passage;

[0053] 22-air inlet;

[0054] 23- vent hole;

[0055] 24-Mounting hole;

[0056] 25- raised portion;

[0057] 251-depression groove;

[0058] 26-seal;

[0059] 27-first thread;

[0060] 3-Limiting parts;

[0061] 4-card slot;

[0062] 5- Cover body. DETAILED DESCRIPTION

[0063] 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.

[0064] It should be clear that the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in the field without creative work are within the scope of protection of the present application.

[0065] 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 "a", "said" 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 other meanings.

[0066] It should be understood that the term "and / or" used in this article 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 at the same time, and B exists alone. In addition, the character " / " in this article generally indicates that the associated objects before and after are in an "or" relationship.

[0067] like Figures 1 to 4 As shown, the embodiment of the present application provides a pressure relief valve, which includes a valve body 1 and a valve seat 2. The valve body 1 includes a valve bonnet 11 and a valve stem 12. The valve bonnet 11 has an accommodating cavity 111. The valve stem 12 is installed in the accommodating cavity 111, and the valve stem 12 will not be separated from the accommodating cavity 111. The valve stem 12 is detachably installed on the valve seat 2 with the valve bonnet 11. The valve seat 2 has an exhaust passage 21. The valve stem 12 can move relative to the valve bonnet 11 to close or open the exhaust passage 21.

[0068] The pressure relief valve is installed on the cover body 5 of a container such as a pressure cooker, and is used to control the pressure inside the pot body. The valve seat 2 is installed on the cover body 5, and the exhaust channel 21 provided on the valve seat 2 is used to connect the interior of the container with the outside world to achieve the exhaust and pressure reduction function. The valve body 1 can be detachably installed on the valve seat 2, for example, by means of a snap, a thread, or the like. The accommodating cavity 111 serves to limit and guide the valve stem 12, thereby improving the stability of the movement of the valve stem 12. When the valve body 1 closes the exhaust channel 21, the interior of the container is no longer connected to the outside world, which facilitates the increase of the gas pressure inside the container. When the valve body 1 opens the exhaust channel 21, the interior of the container is connected to the outside world, which facilitates the reduction of the gas pressure inside the container.

[0069] With the use of the pressure relief valve, foreign matter discharged along with the gas in the container may accumulate inside the exhaust channel 21, such as water vapor, grease, and food residues, which eventually cause the exhaust channel 21 to be blocked, affecting the normal operation of the pressure relief valve. Therefore, the pressure relief valve needs to be cleaned in time. Cleaning the pressure relief valve requires disassembling the pressure relief valve and reinstalling it after cleaning. The current pressure relief valve has a complex internal structure. After the housing of the pressure relief valve is disassembled, there are many other parts inside the exhaust path, which need to be disassembled separately again and reinstalled in sequence after cleaning, resulting in cumbersome disassembly and installation steps, making it inconvenient to clean the pressure relief valve. In the pressure relief valve provided in the embodiment of the present application, the valve stem 12 and the valve bonnet 11 are designed to be connected to each other. When the operator disassembles the valve body 1, the valve stem 12 will not be separated from the valve bonnet 11. The valve stem 12 can be disassembled together with the valve bonnet 11. After the valve body 1 is disassembled, there are no other parts inside the exhaust channel 21, which is convenient for cleaning the valve seat 2. After cleaning, the operator can install the valve stem 12 and the valve bonnet 11 on the valve body 1, and the installation steps are simple. Therefore, the pressure relief valve provided in the embodiment of the present application is easy to clean.

[0070] like Figure 5As shown, in a possible implementation, the inner wall of the accommodating cavity 111 has a first limiting portion 111 a , and the end of the valve stem 12 away from the valve seat 2 has a second limiting portion 124 , and the second limiting portion 124 can abut against the first limiting portion 111 a .

[0071] The first limiting portion 111a and the second limiting portion 124 cooperate with each other to limit the range of motion of the valve stem 12, so that the valve stem 12 can move in the accommodating chamber 111 to realize the opening and closing functions of the exhaust passage 21, and the valve stem 12 will not be separated from the accommodating chamber 111, so that the valve stem 12 can maintain a connection state with the valve cap 11, which is convenient for the disassembly and installation of the valve body 1. Specifically, the first limiting portion 111a can be set to be a shape protruding toward the inside of the accommodating chamber 111, and the first limiting portion 111a has a certain distance from the top wall of the accommodating chamber 111, and the second limiting portion 124 can be set to be a shape protruding along the radial direction of the pressure relief valve, and the bottom of the second limiting portion 124 can abut against the top of the first limiting portion 111a, so that the second limiting portion 124 can only move between the first limiting portion 111a and the top wall of the accommodating chamber 111, and cannot be separated from the accommodating chamber 111.

[0072] like Figure 3 and Figure 5 As shown, in a possible implementation, the outer wall of the valve seat 2 has a first thread 27 , the inner wall of the valve body 1 has a second thread 112 , and the valve body 1 and the valve seat 2 are connected via the first thread 27 and the second thread 112 .

[0073] The valve cap 11 is sleeved and installed on the top of the valve seat 2, and the two are connected by threads, thereby finally realizing the connection between the valve body 1 and the valve seat 2. The threads are stable and reliable. For the user, the installation and disassembly of the valve body 1 can be completed by rotating the valve cap 11. The operation is convenient and simple, and it is easy to clean the pressure relief valve.

[0074] like Figure 1 and Figure 2 As shown, in a possible embodiment, the pressure relief valve includes a limit member 3, which is located at one end of the valve seat 2 away from the valve body 1 and connected to the valve seat 2. The valve seat 2 has a protrusion 25, and the protrusion 25 extends along the radial direction of the pressure relief valve. A snap-fit ​​groove 4 is formed between the limit member 3 and the protrusion 25 for connecting the cover body 5.

[0075] The cover body 5 is preset with a mounting through hole, and a part of the valve body 1 can pass through the mounting through hole. The stopper 3 is connected to the part of the valve body 1 passing through the cover body 5. The stopper 3 is arranged at the end of the valve seat 2 away from the valve body 1. When the stopper 3 and the valve seat 2 are connected, the stopper 3 is located at the bottom of the cover body 5, and the protrusion 25 is located at the top of the cover body 5. The clamping groove 4 formed by the two can be clamped with the cover body 5. The stopper 3 can be set as an annular shape and sleeved on the valve seat 2. The valve seat 2 and the stopper 3 can be connected by threads, which is convenient for installation and disassembly.

[0076] When the pressure relief valve needs to be disassembled and cleaned, the valve body 1 can be disassembled and separated from the valve seat 2, and the valve body 1 and the valve seat 2 can be cleaned separately, wherein the valve body 1 can be cleaned alone, and the valve seat 2 can be cleaned together with the cover body 5, without the need to disassemble the valve seat 2 alone, thereby facilitating the cleaning of the pressure relief valve.

[0077] like Figure 4 and Figure 5 As shown, in a possible implementation manner, the valve body 1 includes an elastic member 13 , one end of the elastic member 13 is connected to the valve cap 11 , and the other end is connected to the valve stem 12 .

[0078] When the valve stem 12 moves, the elastic member 13 can be elastically deformed with the movement of the valve stem 12. The elastic member 13 can apply a thrust to the valve stem 12, so that the valve stem 12 moves in a direction close to the air inlet 22. When the pressure in the pot is relatively low, the valve stem 12 no longer needs to rely solely on its own gravity to seal the air inlet 22. Under the action of the elastic member 13, the valve stem 12 can be subjected to the thrust of the elastic member 13, thereby achieving a more stable sealing effect. The elastic force provided by the elastic member 13 enables the valve stem 12 to achieve a good sealing function even when its own mass is relatively small, which is conducive to reducing the mass of the valve stem 12, and different pressure control effects can be achieved by setting elastic members 13 of different specifications. When the pressure in the pot is relatively high, the valve stem 12 can move in a direction away from the air inlet 22 and compress the elastic member 13. The elastic member 13 can buffer and stabilize the movement of the valve stem 12.

[0079] The elastic member 13 can be a spring and is sleeved on the valve stem 12. A boss can be provided at one end of the valve stem 12 close to the air inlet 22. One end of the elastic member 13 abuts against the top wall of the valve cap 11, and the other end abuts against the boss for easy installation.

[0080] like Figure 3 As shown, in a possible implementation, the exhaust channel 21 has an air inlet 22 and an air outlet 23, the air outlet 23 is arranged on the side wall of the valve body 1, and the air inlet 22 is arranged on the bottom wall of the valve body 1. The air outlet 23 is located on the side wall of the valve seat 2, and the valve stem 12 can extend into the exhaust channel 21 to close or open the air inlet 22.

[0081] The top of the valve seat 2 may be provided with a mounting hole 24, so that the valve stem 12 can extend from the top of the valve seat 2 into the exhaust passage 21. The air inlet 22 is connected to the inside of the pot body, so that the gas inside the pot body enters the valve seat 2 from the air inlet 22 through the cover body 5 and is discharged to the outside from the air outlet 23, thereby realizing the pressure relief function.

[0082] When the pressure in the pot is low, the valve stem 12 will fall and close the air inlet 22, so as to increase the pressure in the pot. When the pressure in the pot is high, the air pressure will push the valve stem 12 to move along the axis of the pressure relief valve to open the air inlet 22, and the gas in the pot can enter the exhaust channel 21 from the air inlet 22 and be discharged from the air outlet 23, so that the pressure in the pot is reduced.

[0083] like Figure 3 As shown, in a possible implementation manner, the valve seat 2 includes a plurality of air outlet holes 23, and the air outlet holes 23 are distributed along the circumference of the pressure relief valve.

[0084] The plurality of air outlet holes 23 can increase the exhaust efficiency of the pressure relief valve, and when a certain air outlet hole 23 is accidentally blocked, the other air outlet holes 23 can play the role of exhausting and reducing pressure, thereby improving the reliability of the pressure relief valve.

[0085] like Figure 5 As shown, in a possible embodiment, the valve stem 12 includes a main body portion 121 and a sealing portion 122 that are interconnected. The main body portion 121 is located in the accommodating cavity 111 and at least partially can extend into the exhaust channel 21. The sealing portion 122 is located at one end of the main body portion 121 close to the valve seat 2 and is used to close or open the air inlet hole 22. The sealing portion 122 is made of ceramic.

[0086] The main body 121 is in the shape of a rod and can move along the inner wall of the accommodating cavity 111, that is, along the axial direction of the pressure relief valve. The end of the main body 121 has a sealing portion 122, and the sealing portion 122 can move with the main body 121. The sealing portion 122 is used to close the air inlet 22, so that the gas in the pot body cannot enter the exhaust channel 21 from the air inlet 22 and be discharged from the air outlet 23, so as to maintain a high pressure in the pot body. At least part of the sealing portion 122 has a large cross-sectional area. When the main body 121 moves in a direction close to the air inlet 22 so that the sealing portion 122 abuts against the valve seat 2, the sealing portion 122 can achieve a good sealing effect on the air inlet 22.

[0087] The material of the sealing part 122 is ceramic material. Ceramic material is resistant to high temperature and pollution-free, suitable for cooking containers, and ceramic material is more corrosion-resistant than metal material, and ceramic material has cost advantages over metal material. The metal material used in the prior art is easy to rust during use and affect the sealing effect. The ceramic material used in the embodiment of the present application can extend its service life and improve its reliability.

[0088] like Figure 5 As shown, in a possible implementation manner, one end of the main body 121 close to the valve seat 2 has a recessed portion 123 , and the sealing portion 122 is installed in the recessed portion 123 , and the sealing portion 122 is spherical.

[0089] The end of the main body 121 is provided with a recessed portion 123 adapted to the shape of the sealing portion 122. The sealing portion 122 is clamped with the main body 121 by interference fit. The assembly and connection operation is convenient, the mechanical connection installation is pollution-free, and the sealing portion 122 is not easy to separate from the valve stem 12.

[0090] The sealing part 122 is spherical, and the cross-sectional areas of the sealing part 122 at different positions along the axial direction of the pressure relief valve are different. When the sealing part 122 closes the air inlet 22, the part of the sealing part 122 with a smaller cross-sectional area can extend into the air inlet 22 to play a guiding role, while the part with a larger cross-sectional area can abut against the inner wall of the air inlet 22 to form an interference fit, thereby achieving a sealing effect on the air inlet 22. The existing sealing parts are conical in shape, with a small cross-sectional area and a large side wall slope angle. If the deviation occurs during the assembly process, the sealing effect may be affected. The sealing part 122 provided in the present application is spherical. Even if the valve stem 12 is deviated to a certain extent during installation, the sealing part 122 can still fall into the air inlet 22 and return to the central position, achieving an interference fit with the air inlet 22 and achieving a sealing effect. Therefore, the sealing part 122 has the functions of centering and correcting deviation. When the sealing part 122 is spherical, the inner wall of the recessed part 123 can be set to a circular arc surface accordingly.

[0091] like Figure 3 As shown, in a possible implementation manner, the valve seat 2 includes a sealing member 26 , which is connected to the protrusion 25 and is located on a side of the protrusion 25 close to the limiting member 3 .

[0092] The seal 26 is made of elastic material, for example, the seal 26 can be made of silicone or other materials. The seal 26 is located between the raised portion 25 and the cover 5. When the valve seat 2 is installed on the cover 5, the seal 26 and the cover 5 are tightly fitted to achieve a good sealing effect. The bottom wall of the raised portion 25 can be provided with a recessed groove 251, and the seal 26 is installed in the recessed groove 251. The recessed groove 251 can limit and fix the seal 26.

[0093] The seal 26 can be configured as an annular sleeve connected to the valve seat 2. When the valve seat 2 and the limit member 3 are connected and clamp the cover body 5, the seal 26 can fit tightly with the protrusion 25 and the cover body 5, and achieve a good sealing effect through its own elasticity, thereby reducing the possibility of leakage of gas inside the pot body from between the cover body 5 and the pressure relief valve, and improving the airtight effect of the pressure relief valve.

[0094] like Figure 5 and Figure 6 As shown, in a possible implementation, the valve body 1 includes a lug 113 , which is located on the outer wall of the valve body 1 , and the lug 113 protrudes in the radial direction of the pressure relief valve.

[0095] When installing and removing the valve body 1, the valve body 1 needs to be rotated relative to the valve seat 2. The valve body 1 of this embodiment has a lug 113, and the operator can easily exert force on the valve body 1 through the lug 113 to rotate the valve body 1. The valve body 1 can have multiple lugs 113, and the lugs 113 can be arranged at intervals along the circumference of the pressure relief valve. The lugs 113 can increase the distance from the force application point to the rotation center, forming a labor-saving lever to facilitate the operator to remove or install the valve body 1.

[0096] The present application provides a cooking utensil, which includes a cover body 5 and a pressure relief valve. The pressure relief valve is the pressure relief valve described in any of the above embodiments, and the pressure relief valve is installed on the cover body 5.

[0097] The embodiment of the present application provides a pressure relief valve and a cooking utensil, wherein the pressure relief valve comprises a valve body 1 and a valve seat 2, wherein the valve body 1 comprises a valve bonnet 11 and a valve stem 12, wherein the valve bonnet 11 has a receiving cavity 111, and the valve stem 12 is installed in the receiving cavity 111 and can move relative to the valve bonnet 11. The valve stem 12 is detachably installed on the valve seat 2 with the valve bonnet 11, and the valve seat 2 has an exhaust passage 21, and the valve stem 12 can close or open the exhaust passage 21. The valve stem 12 is connected to the valve bonnet 11, so that the installation and disassembly operations of the valve body 1 are convenient, and the valve body 1 and the valve seat 2 are easy to clean.

[0098] The above describes in detail the structure, features and effects of the present application based on the embodiments shown in the drawings. The above are only preferred embodiments of the present application, but the present application does not limit the scope of implementation to what is shown in the drawings. Any changes made in accordance with the concept of the present application, or modifications to equivalent embodiments with equivalent changes, which still do not exceed the spirit covered by the description and drawings, should be within the protection scope of the present application.

Claims

1. A pressure relief valve, characterized in that: The pressure relief valve comprises: A valve body (1), the valve body (1) comprising a valve bonnet (11) and a valve stem (12), the valve bonnet (11) having a receiving cavity (111), and the valve stem (12) being mounted in the receiving cavity (111); A valve seat (2), the valve body (1) being detachably mounted on the valve seat (2); The valve stem (12) is detachably mounted on the valve seat (2) along with the valve cap (11); the valve seat (2) has an exhaust passage (21); and the valve stem (12) is capable of moving along the accommodating cavity (111) relative to the valve cap (11) to close or open the exhaust passage (21).

2. The pressure relief valve according to claim 1, characterized in that: The inner wall of the accommodating cavity (111) has a first limiting portion (111a), and the end of the valve stem (12) away from the valve seat (2) has a second limiting portion (124), and the second limiting portion (124) can abut against the first limiting portion (111a).

3. The pressure relief valve according to claim 1, characterized in that: The outer wall of the valve seat (2) has a first thread (27), the inner wall of the valve cap (11) has a second thread (112), and the valve cap (11) and the valve seat (2) are connected via the first thread (27) and the second thread (112).

4. The pressure relief valve according to claim 1, characterized in that: The pressure relief valve comprises a limit member (3), the limit member (3) being located at one end of the valve seat (2) away from the valve body (1) and connected to the valve seat (2), the valve seat (2) having a protrusion (25), the protrusion (25) extending in the radial direction of the pressure relief valve, and a clamping groove (4) being formed between the limit member (3) and the protrusion (25) for connecting to a cover body (5).

5. The pressure relief valve according to claim 1, characterized in that: The valve body (1) comprises an elastic member (13), one end of the elastic member (13) being connected to the valve cap (11), and the other end of the elastic member (13) being connected to the valve stem (12).

6. The pressure relief valve according to claim 1, characterized in that: The exhaust channel (21) has an air inlet hole (22) and an air outlet hole (23), wherein the air inlet hole (22) is located on the bottom wall of the valve seat (2), and the air outlet hole (23) is located on the side wall of the valve seat (2); The valve stem (12) comprises a main body (121) and a sealing portion (122); the main body (121) is located in the accommodating cavity (111) and at least partially extends into the exhaust passage (21); the sealing portion (122) is connected to an end of the main body (121) close to the valve seat (2) and is used to close or open the air inlet hole (22); the sealing portion (122) is made of ceramic.

7. The pressure relief valve according to claim 6, characterized in that: One end of the main body (121) close to the valve seat (2) has a recessed portion (123), the sealing portion (122) is mounted on the recessed portion (123), and the sealing portion (122) is spherical.

8. The pressure relief valve according to claim 4, characterized in that: The valve seat (2) has a sealing member (26), and the sealing member (26) is mounted on a side of the raised portion (25) close to the limiting member (3).

9. The pressure relief valve according to any one of claims 1 to 8, characterized in that: The valve body (1) has a lug (113), wherein the lug (113) is located on an outer wall of the valve body (1), and the lug (113) protrudes in a radial direction of the pressure relief valve.

10. A cooking utensil, characterized in that: The cooking utensil comprises a cover body (5) and a pressure relief valve, wherein the pressure relief valve is the pressure relief valve according to any one of claims 1 to 9, and the pressure relief valve is mounted on the cover body (5).

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