Pressure regulating valve and pressure cooker

Abstract

The utility model relates to a pressure regulating valve and a pressure cooker, the pressure regulating valve comprises a valve body, the valve body is provided with a valve cavity, the bottom of the side wall of the valve body is provided with an exhaust port, and the exhaust port is communicated with the valve cavity and the outside; the breather pipe is fixedly installed on the bottom wall of the valve body and used for being communicated with the interior of a cooker body of the pressure cooker; the valve cover is mounted in the valve cavity, and the valve cover comprises a body and a valve element fixedly connected with the body; the movable pipe is movably connected to the breather pipe and communicates with the breather pipe and the valve cavity; the movable pipe is used for moving upwards in the axial direction of the valve body and is in sealing fit with the valve element so as to cut off communication between the ventilation pipe and the valve cavity. The movable pipe is further used for moving downwards in the axial direction of the valve body and being away from the valve element so that the ventilation pipe can communicate with the valve cavity. When the movable pipe is matched with the valve element in a sealing mode, at least part of the valve element extends into the movable pipe. And the pressure regulating valve can discharge air downwards, so that high-temperature steam is prevented from splashing upwards to scald a user.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of household kitchen utensils, in particular to a pressure regulating valve and a pressure cooker. BACKGROUND

[0002] The cover of the pressure cooker is usually provided with a pressure regulating valve, which can discharge gas outward to release pressure when the pressure in the pot body rises to a certain extent. The existing pressure regulating valve is mostly of an upward gas discharge structure, which is prone to splashing and has a great safety hazard. CONTENT OF THE UTILITY MODEL

[0003] The present application provides a pressure cooker cover and a pressure cooker, which can solve the problem of splashing of the existing pressure regulating valve.

[0004] The first aspect of the present application provides a pressure regulating valve, comprising a valve body having a valve cavity, a gas discharge port provided at the bottom of the side wall of the valve body, the gas discharge port being in communication with the valve cavity and the outside world; an air pipe fixedly installed on the bottom wall of the valve body, the air pipe being used for communication with the inside of the pot body of the pressure cooker; a valve cover installed in the valve cavity, the valve cover comprising a body and a valve core fixedly connected with the body; a movable pipe movably connected with the air pipe, the movable pipe being in communication with the air pipe and the valve cavity; the movable pipe is used for upward movement along the axial direction of the valve body and sealingly cooperates with the valve core to cut off the communication between the air pipe and the valve cavity; the movable pipe is also used for downward movement along the axial direction of the valve body and away from the valve core to make the air pipe communicate with the valve cavity; wherein when the movable pipe sealingly cooperates with the valve core, at least part of the valve core extends into the movable pipe.

[0005] In the above scheme, when the movable pipe moves upward along the axial direction of the valve body and sealingly cooperates with the valve core, the movable pipe can cut off the communication between the air pipe and the valve cavity, at this time, the pressure regulating valve is in a sealed state and does not discharge gas outward. Specifically, when the movable pipe sealingly cooperates with the valve core, at least part of the valve core can extend into the movable pipe, thereby facilitating the sealing effect of the movable pipe and the valve core. The valve core can be a sphere, a trapezoidal platform or other shapes, which are not limited in the present embodiment. When the movable pipe moves downward along the axial direction of the valve body and away from the valve core, a gap is formed between the movable pipe and the valve core, so that the air pipe can communicate with the valve cavity through the movable pipe, at this time, the pressure regulating valve is in a gas discharge state, and the gas in the pot body can flow to the outside world through the air pipe, the movable pipe, the valve cavity and the gas discharge port to realize the pressure relief function. In the pressure regulating valve provided by the present application, the gas discharge port is arranged at the bottom of the side wall of the valve body, so that the pressure regulating valve can discharge gas downward, thereby avoiding the high-temperature steam in the domestic from splashing upward to scald the user, and the flow speed of the gas can be slowed down when the gas flows along the path of the air pipe, the movable pipe, the valve cavity and the gas discharge port, thereby reducing the risk of gas splashing, which is conducive to improving the safety of the pressure regulating valve and the user's experience.

[0006] In one possible design, the pressure regulating valve further includes a spring sleeved on the movable tube along the axial direction of the valve body, with both ends of the spring abutting against the movable tube and the bottom wall of the valve body, respectively. When the gas pressure in the vent pipe is less than the preload of the spring, the movable tube moves upward along the axial direction of the valve body under the action of the spring and seals with the valve core. When the gas pressure in the vent pipe is greater than the preload of the spring, the movable tube moves downward along the axial direction of the valve body and away from the valve core under the action of the gas pressure in the vent pipe.

[0007] In the above scheme, when the gas pressure in the vent pipe is less than the spring's preload, the movable tube moves upward along the valve body's axis under the spring's support and seals with the valve core. At this time, the spring applies pressure to the movable tube, which helps improve the sealing effect between the movable tube and the valve core. When the gas pressure in the vent pipe is greater than the spring's preload, since the valve core is fixed, the gas pressure pushes the movable tube downward along the valve body's axis and away from the valve core, thus creating a gap between the movable tube and the valve core, achieving automatic pressure relief of the pressure regulating valve. When the gas inside the pot is gradually discharged, causing the gas pressure in the vent pipe to gradually decrease, the movable tube can move upward along the valve body's axis under the spring's restoring force to reset and re-seal with the valve core.

[0008] In one possible design, the bottom wall of the valve body is provided with a limiting part, the limiting part and the bottom wall of the valve body form a limiting space, and the end of the spring away from the movable tube is located within the limiting space.

[0009] In the above scheme, the limiting part can limit the spring in the radial direction of the valve body, thereby improving the installation stability of the spring and preventing the spring from shifting.

[0010] In one possible design, along the axial direction of the valve body, a receiving groove is provided on the side of the body facing the movable tube, and the valve core is fixed in the receiving groove; at least a portion of the movable tube extends into the receiving groove.

[0011] In the above scheme, when the pressure regulating valve is in the state of venting and depressurizing, the gas in the vent pipe can flow upward into the receiving tank through the movable pipe, and after impacting the side wall or top wall of the receiving tank, it flows downward into the valve chamber. Therefore, the receiving tank can guide the flow of gas and further slow down the flow speed of gas, thereby reducing the risk of gas splashing outward.

[0012] In one possible design, the sidewall of the valve body is provided with multiple limiting grooves of different heights along the axial direction of the valve body; the valve cover also includes an adjusting rod fixedly connected to the body, the adjusting rod extending radially along the valve body, the adjusting rod being used to limit and cooperate with the multiple limiting grooves respectively to adjust the preload of the spring.

[0013] In the above scheme, the adjusting rod is used to limit the movement of multiple limiting grooves, thereby adjusting the height of the valve cover in the axial direction of the valve body. When the height of the valve cover is different, the pressure applied by the valve core to the moving tube is also different, and the degree of spring compression is also different. Therefore, by adjusting the adjusting rod and different limiting grooves for limiting the movement, the preload of the spring can be adjusted, thereby realizing the pressure regulating function of the pressure regulating valve.

[0014] In one possible design, the side wall of the valve body is provided with a through hole, which extends obliquely in the circumferential direction of the valve body; the through hole has a lower wall surface, and a plurality of limiting grooves are spaced apart on the lower wall surface along the extension direction of the through hole; the adjusting rod is slidably connected to the through hole, and the adjusting rod can be respectively limited and engaged with the plurality of limiting grooves during the sliding process along the through hole.

[0015] In the above scheme, the adjusting rod is slidably connected to the through hole. The user can push the adjusting rod to slide along the through hole, so that the adjusting rod can be matched with different limiting grooves to adjust the height of the valve cover, thereby changing the preload of the spring and making it convenient for the user.

[0016] In one possible design, the valve cover includes two adjusting rods, which are symmetrically distributed radially along the valve body; the side wall of the valve body is provided with two through holes, which are slidably connected to the two adjusting rods respectively.

[0017] In the above design, the two adjusting rods are symmetrically distributed radially along the valve body, which helps improve the installation stability of the valve cover and prevents it from tilting or shifting. The two through holes are slidably connected to the two adjusting rods respectively. When the user slides one adjusting rod along its corresponding through hole, the other adjusting rod can also slide simultaneously along its corresponding through hole, and the two adjusting rods remain horizontal radially aligned with the valve body.

[0018] In one possible design, the limiting groove includes a first limiting groove, and when the adjusting rod is engaged with the first limiting groove, the spring is in an extended state, and the valve core and the movable tube have a gap in the axial direction of the valve body.

[0019] In the above scheme, when the adjusting rod is engaged with the first limiting groove, the vent pipe and the valve chamber are always in a connected state, and the pressure relief valve can continuously vent outward, thereby achieving a rapid venting effect.

[0020] In one possible design, a sealing ring is installed at one end of the valve body facing the exhaust port along the axial direction of the valve body; the sealing ring abuts against the side wall of the valve body along the radial direction of the valve body.

[0021] In the above scheme, along the radial direction of the valve body, the sealing ring abuts against the side wall of the valve body to form a sealing fit between the valve body and the valve cover, preventing the gas in the valve cavity from flowing upward along the gap between the valve body and the valve cover, and ensuring that the pressure regulating valve can exhaust gas in a directional manner towards the exhaust port.

[0022] A second aspect of this application provides a pressure cooker, including a pot body and a lid, the lid being fastened to the pot body, the lid including a cover body and the pressure regulating valve described above, the pressure regulating valve being installed on the cover body.

[0023] In the above design, when the lid is closed onto the pot body, the vent pipe can connect to the inside of the pot body, enabling the pressure regulating valve to release pressure and vent air from the pressure cooker. This pressure regulating valve achieves a downward venting effect, thereby improving the safety of the pressure cooker's venting process.

[0024] It should be understood that the above general description and the following detailed description are merely exemplary and do not limit this application. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of the pressure regulating valve provided in this application;

[0026] Figure 2 for Figure 1 A schematic cross-sectional view of the pressure regulating valve in the first scenario, under the condition of no venting.

[0027] Figure 3 for Figure 2 A schematic cross-sectional view of the pressure regulating valve in the first scenario under the exhaust state.

[0028] Figure 4 for Figure 1 A schematic cross-sectional view of the pressure regulating valve in the second scenario, under the condition of no venting.

[0029] Figure 5 for Figure 1 A cross-sectional view of the pressure regulating valve in the third scenario;

[0030] Figure 6 for Figure 1 A schematic diagram of the pressure regulating valve from another perspective.

[0031] Figure label:

[0032] 1-Valve body;

[0033] 10 - Valve chamber;

[0034] 11 - Exhaust port;

[0035] 12-Limiting part;

[0036] 121 - Limiting space;

[0037] 13-Through hole;

[0038] 131-lower wall;

[0039] 14-Limiting groove;

[0040] 141 - First limiting groove;

[0041] 142 - Second limiting groove;

[0042] 143 - Third limiting groove;

[0043] 2-Ventilation tube;

[0044] 3-Valve cover;

[0045] 31-Ontology;

[0046] 311 - Receiving groove;

[0047] 32-Valve core;

[0048] 33 - Adjusting rod;

[0049] 4-Active tube;

[0050] 41-Extension;

[0051] 5-Spring;

[0052] 6-Sealing ring.

[0053] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with this application and, together with the description, serve to explain the principles of this application. Detailed Implementation

[0054] To better understand the technical solution of this application, the embodiments of this application will be described in detail below with reference to the accompanying drawings.

[0055] It should be understood that the described embodiments are merely some, not all, of the embodiments in this application. All other embodiments obtained by those skilled in the art based on the embodiments in this application without inventive effort are within the scope of protection of this application.

[0056] The terminology used in the embodiments of this application is for the purpose of describing particular embodiments only and is not intended to be limiting of this application. The singular forms “a,” “the,” and “the” used in the embodiments of this application and the appended claims are also intended to include the plural forms unless the context clearly indicates otherwise.

[0057] It should be understood that the term "and / or" used in this article is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, and B existing alone. Additionally, the character " / " in this article generally indicates that the preceding and following related objects have an "or" relationship.

[0058] It should be noted that the directional terms such as "upper," "lower," "left," and "right" described in the embodiments of this application are used to describe the angles shown in the accompanying drawings and should not be construed as limiting the embodiments of this application. Furthermore, in the context, it should be understood that when referring to an element being connected "upper" or "lower" to another element, it can be directly connected to the other element "upper" or "lower," or indirectly connected through an intermediate element.

[0059] This application provides a pressure regulating valve, such as Figure 1 and Figure 2 As shown, the pressure regulating valve includes a valve body 1, a valve cover 3, and a movable tube 4. The valve body 1 has a valve cavity 10, and an exhaust port 11 is provided at the bottom of the side wall of the valve body 1, which connects the valve cavity 10 to the outside. A vent pipe 2 is fixedly installed on the bottom wall of the valve body 1, and the vent pipe 2 can also be integrally injection molded with the valve body 1. Along the axial direction Z of the valve body 1, the lower end of the vent pipe 2 is located outside the valve cavity 10 and is used to extend into the interior of the pressure cooker, while the upper end of the vent pipe 2 is located inside the valve cavity 10 and communicates with the valve cavity 10, that is, the vent pipe 2 can connect the interior of the pressure cooker and the valve cavity 10. The valve cover 3 is installed inside the valve cavity 10, and the valve cover 3 includes a body 31 and a valve core 32 fixedly connected to the body 31. The body 31 and the valve core 32 can be integrally injection molded. Along the axial direction Z of the valve body 1, the valve core 32 is located at the end of the valve cover 3 facing the vent pipe 2. The movable tube 4 is located inside the valve cavity 10 and is sleeved on the upper end of the vent tube 2. The two ends of the movable tube 4 along the axial direction Z of the valve body 1 are connected to the vent tube 2 and the valve cavity 10 respectively. The movable tube 4 can move up and down relative to the vent tube 2 along the axial direction Z of the valve body 1.

[0060] like Figure 2As shown, when the movable tube 4 moves upward along the axial direction Z of the valve body 1 and seals with the valve core 32, the movable tube 4 can cut off the connection between the vent pipe 2 and the valve cavity 10. At this time, the pressure regulating valve is in a sealed state and does not exhaust gas. Specifically, when the movable tube 4 and the valve core 32 are sealed together, at least a portion of the valve core 32 can extend into the movable tube 4, thereby improving the sealing effect between the movable tube 4 and the valve core 32. The valve core 32 can be a sphere, a trapezoidal platform, or other shapes; this embodiment does not limit this. Figure 3 As shown, when the movable tube 4 moves downward along the axial direction Z of the valve body 1 and moves away from the valve core 32, a gap is formed between the movable tube 4 and the valve core 32, so that the vent pipe 2 can be connected to the valve cavity 10 through the movable tube 4. At this time, the pressure regulating valve is in the exhaust state, and the gas in the pot can flow to the outside through the vent pipe 2, the movable tube 4, the valve cavity 10 and the exhaust port 11 to achieve the pressure relief function.

[0061] In the pressure regulating valve provided in this application embodiment, the exhaust port 11 is located at the bottom of the side wall of the valve body 1, so that the pressure regulating valve can exhaust downward, thereby avoiding high temperature steam from splashing upward and scalding the user. Moreover, when the gas flows along the path of the vent pipe 2, the movable pipe 4, the valve chamber 10 and the exhaust port 11, the gas flow speed can be slowed down, reducing the risk of gas splashing, which is beneficial to improving the safety of the pressure regulating valve and the user's experience.

[0062] like Figure 2 As shown, along the axial direction Z of the valve body 1, a receiving groove 311 is provided on the side of the main body 31 facing the movable tube 4. The valve core 32 is fixed in the receiving groove 311, and at least a portion of the movable tube 4 extends into the receiving groove 311. When the pressure regulating valve is in the venting and depressurizing state, the gas in the vent pipe 2 can flow upward into the receiving groove 311 through the movable tube 4. After impacting the side wall or top wall of the receiving groove 311, it flows downward into the valve chamber 10. Therefore, the receiving groove 311 can guide the flow of gas, realize directional venting, and further slow down the flow speed of the gas, thereby reducing the risk of gas splashing outward.

[0063] like Figure 2 As shown, the pressure regulating valve also includes a spring 5, which is located inside the valve cavity 10 and sleeved on the movable tube 4. An extension 41 is provided at the top end of the movable tube 4, extending along the axial direction Z of the valve body 1. The two ends of the spring 5 abut against the extension 41 and the bottom wall of the valve body 1, respectively. When the gas pressure in the vent pipe 2 is less than the preload of the spring 5, the movable tube 4 moves upward along the axial direction Z of the valve body 1 under the support of the spring 5 and seals with the valve core 32. At this time, the spring 5 can apply pressure to the movable tube 4, which helps to improve the sealing effect between the movable tube 4 and the valve core 32. Figure 3As shown, when the gas pressure in the vent pipe 2 is greater than the preload of the spring 5, since the valve core 32 remains stationary, the gas pressure causes the movable pipe 4 to move downwards along the axial direction Z of the valve body 1 and away from the valve core 32. This creates a gap between the movable pipe 4 and the valve core 32, enabling the pressure regulating valve to automatically release pressure and exhaust gas. When the gas inside the pot is gradually discharged, causing the gas pressure in the vent pipe 2 to gradually decrease, the movable pipe 4 can move upwards along the axial direction Z of the valve body 1 under the restoring force of the spring 5 to reset and re-seal with the valve core 32.

[0064] like Figure 2 and Figure 3 As shown, the bottom wall of the valve body 1 is provided with a limiting part 12. The limiting part 12 has an annular structure and can form a limiting space 121 with the bottom wall of the valve body 1. The end of the spring 5 away from the movable tube 4 can be installed in the limiting space 121. The limiting part 12 can limit the spring 5 in the radial direction X of the valve body 1, thereby improving the installation stability of the spring 5 and preventing the spring 5 from shifting.

[0065] like Figure 1 and Figure 2 As shown, along the axial direction Z of the valve body 1, the side wall of the valve body 1 is provided with multiple limiting grooves 14 of different heights. The valve cover 3 also includes an adjusting rod 33 fixedly connected to the body 31. The adjusting rod 33 extends outward along the radial direction X of the valve body 1 and is used to limit and cooperate with the multiple limiting grooves 14 respectively, thereby adjusting the height position of the valve cover 3 in the axial direction Z of the valve body 1. When the height position of the valve cover 3 is different, the pressure applied by the valve core 32 to the movable tube 4 is also different, and the compression degree of the spring 5 is also different. Therefore, by limiting and cooperating with the adjusting rod 433 and different limiting grooves 14, the preload of the spring 5 can be adjusted, thereby realizing the pressure regulating function of the pressure regulating valve. When the position of the valve cover 3 is high and the preload of the spring 5 is small, the pressure relief valve can start to discharge gas when the gas pressure in the pot is low. When the position of the valve cover 3 is low and the preload of the spring 5 is large, the pressure relief valve will start to discharge gas only when the gas pressure in the pot is high, thus realizing the pressure regulating function of the pressure regulating valve.

[0066] Specifically, such as Figure 1As shown, a through hole 13 is provided on the side wall of the valve body 1. The through hole 13 extends obliquely in the circumferential direction of the valve body 1. The through hole 13 has a lower wall surface 131. Along the extending direction of the through hole 13, multiple limiting grooves 14 are spaced apart on the lower wall surface 131. At least a portion of the adjusting rod 33 extends to the outside along the through hole 13. The adjusting rod 33 is slidably connected to the through hole 13. The user can adjust the height of the valve cover 3 by pushing the adjusting rod 33 along the through hole 13, so that the adjusting rod 33 is respectively limited and engaged with different limiting grooves 14, thereby changing the preload of the spring 5. The structure is simple and easy to operate, making it convenient for users. The lower wall surface 131 can be a smooth arc surface structure, which makes it easier for the adjusting rod 33 to slide along the through hole 13. This embodiment does not limit the specific number of limiting grooves 14.

[0067] like Figure 1 As shown, taking the example of a through hole 13 with three limiting grooves 14 of different heights, the pressure regulating structure of the pressure regulating valve is described in detail. Along the extension direction of the through hole 13, the lower wall surface 131 of the through hole 13 is provided with a first limiting groove 141, a second limiting groove 142, and a third limiting groove 143 spaced apart. Along the axial direction Z of the valve body 1, the height of the first limiting groove 141 is greater than the height of the second limiting groove 142, and the height of the third limiting groove 143 is less than the height of the second limiting groove 142. For example... Figure 2 As shown, when the adjusting rod 33 is engaged with the third limiting groove 143, the valve cover 3 is in a lower position along the axial direction Z of the valve body 1. When the pressure relief valve is not venting, the pressure exerted by the valve core 32 on the movable tube 4 is relatively large. At this time, the spring 5 is highly compressed, that is, the preload of the spring 5 is relatively large. Only when the gas pressure in the vent pipe 2 is high can the movable tube 4 overcome the preload of the spring 5 and move downward along the axial direction Z of the valve body 1. That is, when the adjusting rod 33 is engaged with the third limiting groove 143, the pressure regulating valve can only vent and relieve pressure when the gas pressure inside the pot is high.

[0068] like Figure 4 As shown, when the adjusting rod 33 is engaged with the second limiting groove 142, the valve cover 3 is in a relatively central position along the axial direction Z of the valve body 1. When the pressure relief valve is not venting, the pressure applied by the valve core 32 to the movable tube 4 is moderate. At this time, the compression degree of the spring 5 is small, that is, the preload of the spring 5 is small. When the gas pressure in the vent pipe 2 is low, the movable tube 4 can overcome the preload of the spring 5 and move downward along the axial direction Z of the valve body 1. That is, when the adjusting rod 33 is engaged with the second limiting groove 142, the pressure regulating valve can vent and relieve pressure when the gas pressure in the pot is low.

[0069] like Figure 5As shown, when the adjusting rod 33 is engaged with the first limiting groove 141, the valve cover 3 is in a relatively high position in the axial direction Z of the valve body 1, and the height of the valve core 32 exceeds the support range of the spring 5. That is, when the adjusting rod 33 is engaged with the first limiting groove 141, the spring 5 is in an extended state, and there is a gap between the valve core 22 and the movable tube 4 in the axial direction Z of the valve body 1. At this time, the vent pipe 2 and the valve cavity 10 are always in a connected state, and the pressure relief valve can continuously vent outward, thereby achieving a rapid venting effect.

[0070] Specifically, such as Figure 2 and Figure 6 As shown, the valve cover 3 includes two adjusting rods 33, which are symmetrically distributed along the radial direction X of the valve body 1. This arrangement helps improve the installation stability of the valve cover 3 and prevents it from tilting or shifting. The side wall of the valve body 1 is provided with two through holes 13, which are slidably connected to the two adjusting rods 33. The two through holes 13 have the same shape to ensure that when the user slides one adjusting rod 33 along its corresponding through hole 13, the other adjusting rod 33 can also slide along its corresponding through hole 13 simultaneously, and the two adjusting rods 33 can always remain horizontal in the radial direction X of the valve body 1.

[0071] like Figure 2 As shown, a sealing ring 6 is installed at the end of the valve body 31 facing the exhaust port 11 along the axial direction Z of the valve body 1. The sealing ring 6 is fixedly connected to the valve body 31. Along the radial direction X of the valve body 1, the sealing ring 6 abuts against the side wall of the valve body 1 to form a sealing fit between the valve body 1 and the valve cover 3, preventing the gas in the valve cavity 10 from flowing upward along the gap between the valve body 1 and the valve cover 3, and ensuring that the pressure regulating valve can exhaust gas in a directional manner towards the exhaust port 11.

[0072] This application also provides a pressure cooker, which includes a pot body and a lid. The lid is fastened to the pot body and includes a cover body and the aforementioned pressure regulating valve. The outer bottom wall of the valve body 1 of the pressure regulating valve is used for fixed connection with the cover body. When the lid is fastened to the pot body, the vent pipe 2 can communicate with the interior of the pot body, and the pressure regulating valve can realize the pressure relief and venting function of the pressure cooker. Since the pressure regulating valve has the above-described technical effects, the pressure cooker including the pressure regulating valve should also have the above technical effects, which will not be elaborated here.

[0073] The above description is merely a preferred embodiment of this application and is not intended to limit this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A pressure regulating valve, characterized in that, include: The valve body (1) has a valve cavity (10), and an exhaust port (11) is provided at the bottom of the side wall of the valve body (1), which connects the valve cavity (10) to the outside. Vent pipe (2) is fixedly installed on the bottom wall of the valve body (1) and is used to communicate with the inside of the pressure cooker. A valve cover (3) is installed in the valve cavity (10). The valve cover (3) includes a body (31) and a valve core (32) fixedly connected to the body (31). A movable tube (4) is movably connected to the vent tube (2), and the movable tube (4) connects the vent tube (2) and the valve chamber (10); the movable tube (4) is used to move upward along the axial direction of the valve body (1) and seal with the valve core (32) to cut off the communication between the vent tube (2) and the valve chamber (10); the movable tube (4) is also used to move downward along the axial direction of the valve body (1) and away from the valve core (32) so that the vent tube (2) communicates with the valve chamber (10); When the movable tube (4) is sealed to the valve core (32), at least a portion of the valve core (32) extends into the movable tube (4).

2. The pressure regulating valve according to claim 1, characterized in that, The pressure regulating valve also includes a spring (5), which is sleeved on the movable tube (4) along the axial direction of the valve body (1). The two ends of the spring (5) abut against the bottom wall of the movable tube (4) and the valve body (1), respectively. When the gas pressure in the vent pipe (2) is less than the preload of the spring (5), the movable pipe (4) is used to move upward along the axial direction of the valve body (1) under the action of the spring (5) and seal with the valve core (32); When the gas pressure in the vent pipe (2) is greater than the preload of the spring (5), the movable pipe (4) is used to move downward along the axial direction of the valve body (1) and away from the valve core (32) under the action of the gas pressure in the vent pipe (2).

3. The pressure regulating valve according to claim 2, characterized in that, The bottom wall of the valve body (1) is provided with a limiting part (12), and the limiting part (12) and the bottom wall of the valve body (1) form a limiting space (121). The end of the spring (5) away from the movable tube (4) is located in the limiting space (121).

4. The pressure regulating valve according to claim 1, characterized in that, Along the axial direction of the valve body (1), the main body (31) is provided with a receiving groove (311) on the side facing the movable tube (4), and the valve core (32) is fixed in the receiving groove (311); At least a portion of the movable tube (4) extends into the receiving groove (311).

5. The pressure regulating valve according to claim 2, characterized in that, Along the axial direction of the valve body (1), the side wall of the valve body (1) is provided with a plurality of limiting grooves (14) of different heights; The valve cover (3) also includes an adjusting rod (33) fixedly connected to the body (31). The adjusting rod (33) extends radially along the valve body (1). The adjusting rod (33) is used to limit and cooperate with the plurality of limiting grooves (14) respectively to adjust the preload of the spring (5).

6. The pressure regulating valve according to claim 5, characterized in that, The valve body (1) has a through hole (13) on its side wall, and the through hole (13) extends obliquely in the circumferential direction of the valve body (1). The through hole (13) has a lower wall surface (131), and a plurality of limiting grooves (14) are spaced apart on the lower wall surface (131) along the extending direction of the through hole (13); The adjusting rod (33) is slidably connected to the through hole (13), and the adjusting rod (33) can be limited and engaged with the multiple limiting grooves (14) respectively during the sliding process along the through hole (13).

7. The pressure regulating valve according to claim 6, characterized in that, The valve cover (3) includes two adjusting rods (33), which are symmetrically distributed radially along the valve body (1); The valve body (1) has two through holes (13) on its side wall, and the two through holes (13) are slidably connected to the two adjusting rods (33) respectively.

8. The pressure regulating valve according to claim 6, characterized in that, The limiting groove (14) includes a first limiting groove (141). When the adjusting rod (33) is in a limiting engagement with the first limiting groove (141), the spring (5) is in an extended state. The valve core (32) and the movable tube (4) have a gap in the axial direction of the valve body (1).

9. The pressure regulating valve according to claim 1, characterized in that, Along the axial direction of the valve body (1), a sealing ring (6) is installed at one end of the body (31) facing the exhaust port (11); Along the radial direction of the valve body (1), the sealing ring (6) abuts against the side wall of the valve body (1).

10. A pressure cooker, characterized in that, include: Pot body; A pot lid, which is fastened to the pot body, the pot lid comprising a lid body and a pressure regulating valve as described in any one of claims 1-9, the pressure regulating valve being installed on the lid body.

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