Pressure valve assembly, upper cover assembly and cooking utensil

Abstract

The pressure valve assembly comprises a valve seat, an exhaust pipe, a sealing gasket and a gravity ball, the valve seat is provided with an up-down through channel, the exhaust pipe is arranged in the channel in an up-down sliding mode, the exhaust pipe is provided with an up-down through exhaust channel, the sealing gasket is arranged at the top of the valve seat, and the gravity ball is arranged on the top of the valve seat. The exhaust pipe can penetrate through the sealing gasket in a sliding manner; the gravity ball is arranged above the sealing gasket and the exhaust pipe, and under the action of gravity, the gravity ball is in sealing contact with the sealing gasket or the exhaust pipe so as to close the exhaust channel; and when the gravity ball is in sealing contact with the exhaust pipe, the sealing gasket is in sealing connection with the exhaust pipe, and / or the exhaust pipe is in sealing connection with the valve seat. The pressure valve assembly has good sealing performance under the conditions of positive pressure, normal pressure and negative pressure, and noise can be avoided in the using process.

Description

Technical Field

[0001] The utility model relates to the technical field of cooking equipment, in particular to a pressure valve assembly, an upper cover assembly and a cooking utensil. Background Art

[0002] The electric rice cooker is a commonly used household appliance. During the cooking process, as the soaking time goes by and the water temperature rises, the surface of the rice grains begins to gelatinize and become sticky, and the rice grains will stick together to form a rice ball. Since the thermal conductivity of rice is much lower than that of water, the clumped rice grains will hinder the uniform transfer of heat to the rice in the steamer, causing the rice grains wrapped in the middle of the rice ball to be unable to absorb water and become half-cooked. In addition, the rice in the electric rice cooker is heated unevenly from top to bottom, so the gelatinization degree of the rice in different positions in the rice cooker is also inconsistent, causing some places to be over-gelatinized and rotten, while some places are not completely gelatinized, resulting in a large difference in the uniformity of the maturity of the whole pot of rice, affecting the taste of the rice.

[0003] In order to solve the problem of insufficient water absorption and insufficient gelatinization of rice grains, industry technicians have improved the rice cooker so that the rice cooker can achieve positive pressure and negative pressure in the pot in stages during the cooking process. Specifically, in the water absorption stage, a vacuum device is used to generate negative pressure in the pot to promote water absorption of rice grains. After boiling, the cooking cavity is sealed to generate positive pressure in the pot so that the temperature in the pot is increased to above 100°C to promote sufficient gelatinization of rice grains. For example, Chinese patent CN106551612A discloses an electric rice cooker and a cooking control method thereof, wherein a vent connecting the outside of the rice cooker and the cooking cavity is provided on the pot cover, and a pressure limiting valve can slide or descend relative to the pot cover to close the vent, thereby forming a sealed cavity to generate pressure. However, the pressure limiting valve and the pot cover are in rigid contact, the sealing is poor, and it is easy to leak. When vacuuming, the negative pressure in the pot is formed slowly, the vacuum degree achieved is low, and the negative pressure in the pot is maintained for a short time, resulting in poor negative pressure working performance of the rice cooker. Moreover, when the pressure limiting valve closes the vent, the collision between the pressure limiting valve and the pot cover is likely to produce abnormal noise.

[0004] In order to solve the above problems, Chinese patent CN204765002U discloses an upper cover assembly and an electric rice cooker having the same, which closes the exhaust passage through a floating ball in contact with a sealing gasket to ensure the sealing inside the cooker and facilitate the formation of negative pressure. However, since the sealing gasket is made of elastic material, it will deform when sealing with the floating ball. When the electric rice cooker needs to work under positive pressure, the air pressure inside the cooker will overcome the gravity of the floating ball to make the floating ball float up, affecting the sealing effect between the floating ball and the sealing gasket, thereby causing the positive pressure working pressure inside the cooker to be unstable, affecting the positive pressure working performance of the electric rice cooker. Utility Model Content

[0005] In order to overcome at least one of the defects of the prior art described above, the utility model provides a pressure valve assembly, which has good sealing performance under positive pressure, normal pressure and negative pressure, and can avoid noise during use.

[0006] The technical solution adopted by the utility model to solve the problem is:

[0007] A pressure valve assembly comprises: a valve seat, an exhaust pipe, a sealing gasket and a gravity ball, wherein the valve seat is provided with a vertically penetrating passage, the exhaust pipe is slidably arranged in the passage, the exhaust pipe is provided with an exhaust passage penetrating vertically, the sealing gasket is arranged on the top of the valve seat, and the exhaust pipe can slide through the sealing gasket;

[0008] The gravity ball is arranged above the sealing gasket and the exhaust pipe. Under the action of gravity, the gravity ball is in sealing contact with the sealing gasket or the exhaust pipe to close the exhaust passage.

[0009] When the gravity ball is in sealing contact with the exhaust pipe, the sealing gasket and the exhaust pipe, and / or the exhaust pipe and the valve seat are sealed and connected.

[0010] Furthermore, the outer tube wall of the exhaust pipe is provided with a convex portion protruding away from the exhaust pipe, and the inner wall of the valve seat is provided with a boss protruding into the channel. The boss is arranged corresponding to the convex portion, and the boss is located below the convex portion. The projections of the boss and the convex portion in the extension direction of the channel at least partially overlap.

[0011] Furthermore, the outer diameter of the protrusion is greater than the inner diameter of the sealing gasket.

[0012] Furthermore, when the gravity ball is in sealing contact with the exhaust pipe, the top end of the protrusion abuts against the bottom end of the gasket.

[0013] Furthermore, the end surface of the abuttingly connected protrusion and the end surface of the sealing gasket are both inclined surfaces that are inclined up and down, and the shapes of the two inclined surfaces are matched.

[0014] Further, the end of the inclined surface away from the outer tube wall of the exhaust pipe is lower than the end of the inclined surface close to the outer tube wall of the exhaust pipe.

[0015] Furthermore, the sealing gasket is provided with a through hole which penetrates vertically, the exhaust pipe can slide through the through hole, and the outer tube wall of the exhaust pipe is in sealing contact with the inner wall of the through hole.

[0016] Further, the central axis of the channel, the central axis of the exhaust channel and the central axis of the through hole coincide with each other.

[0017] Furthermore, the pressure valve assembly also includes a pressure plate, which is pressed on the sealing gasket and fixedly connected to the valve seat. The pressure plate is provided with a groove running through the upper and lower parts. The gravity ball is arranged in the groove and seals and contacts the sealing gasket or the exhaust pipe.

[0018] Furthermore, the inner wall of the groove is provided with an arc structure adapted to the outer circumference of the gravity ball.

[0019] Furthermore, the pressure valve assembly also includes a ball cover, which is arranged on the gravity ball and fixedly connected to the valve seat.

[0020] The utility model also provides an upper cover assembly, comprising a cover plate and a pressure valve assembly, wherein the cover plate is provided with an exhaust hole penetrating from top to bottom, the pressure valve assembly is arranged at the exhaust hole, and the pressure valve assembly and the cover plate are sealed and fixedly connected.

[0021] The utility model also provides a cooking utensil, comprising a pot body and an upper cover assembly, wherein the upper cover assembly is rotatably mounted on the pot body to open or close the cooking cavity.

[0022] Beneficial effects:

[0023] The pressure valve assembly of the utility model can slide up and down in the channel by arranging the exhaust pipe. When the cooking chamber is under negative pressure or normal pressure, the cooking chamber has no force on the exhaust pipe. The exhaust pipe slides down into the channel due to its own gravity. The exhaust pipe does not contact the gravity ball. The gravity ball contacts the sealing gasket to form a sealing structure. Since the sealing gasket is an elastic structure, the sealing performance between the gravity ball and the sealing gasket is good, so as to create a good negative pressure or normal pressure cooking environment.

[0024] When there is positive pressure in the cooking cavity, the positive pressure overcomes the gravity of the exhaust pipe and pushes the exhaust pipe to slide upward until it contacts the gravity ball. The gravity ball and the exhaust pipe form a sealing structure. Due to the effect of the upward positive pressure, the rigid gravity ball and the exhaust pipe can be effectively sealed to create a good positive pressure cooking environment.

[0025] Furthermore, when cooking under negative pressure or normal pressure, the gravity ball contacts and seals with the elastic sealing gasket, and the contact between the two does not produce abnormal noise. When cooking under positive pressure, although the exhaust pipe and the gravity ball are both rigid structures, the setting of the sealing gasket can buffer the upward sliding of the exhaust pipe, which can effectively avoid abnormal noise. Therefore, the pressure valve assembly of the utility model can effectively avoid the generation of noise during operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 This is an exploded view of the cooking utensil of the present invention;

[0027] Figure 2 It is a structural schematic diagram of the upper cover assembly of the utility model;

[0028] Figure 3 It is an exploded view of the pressure valve assembly and the cover plate of the utility model;

[0029] Figure 4 It is a structural schematic diagram of the pressure valve assembly being located in the upper cover assembly under positive pressure;

[0030] Figure 5 It is a schematic diagram of the structure in which the pressure valve assembly is located in the upper cover assembly under negative pressure or normal pressure.

[0031] The meanings of the reference numerals are as follows:

[0032] 100, upper cover assembly; 200, pot body; 1, valve seat; 11, channel; 12, boss; 2, exhaust pipe; 21, exhaust channel; 22, convex part; 3, sealing gasket; 31, through hole; 4, gravity ball; 5, pressure plate; 51, groove; 6, ball cover; 7, cover plate; 71, exhaust hole; 8, sealing ring; 9, limit ring. DETAILED DESCRIPTION

[0033] For better understanding and implementation, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention.

[0034] In the description of the present invention, it should be noted that the terms "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside" and "outside" etc. indicating directions or positional relationships are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation on the present invention.

[0035] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art of the present invention. The terms used herein in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention.

[0036] The utility model provides a cooking utensil, which can be an electric rice cooker, a pressure cooker or the like, and can realize positive pressure, normal pressure or negative pressure operation. Figure 1 The cooking device includes a pot body 200 and an upper cover assembly 100, wherein the upper cover assembly 100 covers the pot body 200 to form a cooking cavity between the upper cover assembly 100 and the pot body 200. Furthermore, the upper cover assembly 100 is rotatably mounted on the pot body 200 to open or close the cooking cavity.

[0037] Regardless of whether it is working under positive pressure, normal pressure or negative pressure, the cooking appliance needs to have good sealing performance. Therefore, the utility model also provides an upper cover assembly 100, see Figure 1 and Figure 2 The upper cover assembly 100 includes a cover plate 7 and a pressure valve assembly. Figure 3The cover plate 7 is provided with an exhaust hole 71 which runs through the cover plate 7 from top to bottom, and the pressure valve assembly is arranged at the exhaust hole 71, and the pressure valve assembly is sealed and fixedly connected to the cover plate 7. Therefore, the exhaust hole 71 is arranged to facilitate exhaust of the cooking cavity, and the pressure valve assembly is arranged at the exhaust hole 71. When the exhaust operation of the cooking cavity is not performed, the pressure valve assembly can ensure the stability of the pressure in the cooking cavity.

[0038] Therefore, the sealing performance of the pressure valve assembly is very important. Figure 3 , Figure 4 and Figure 5 The pressure valve assembly includes a valve seat 1, an exhaust pipe 2, a sealing gasket 3 and a gravity ball 4. The valve seat 1 is provided with a vertically penetrating channel 11. The exhaust pipe 2 is slidably arranged in the channel 11. The exhaust pipe 2 is provided with an exhaust channel 21 that is vertically penetrating. The sealing gasket 3 is arranged on the top of the valve seat 1, and the exhaust pipe 2 can slide through the sealing gasket 3. The gravity ball 4 is arranged above the sealing gasket 3 and the exhaust pipe 2. Under the action of gravity, the gravity ball 4 is in sealing contact with the sealing gasket 3 or the exhaust pipe 2 to close the exhaust channel 21. Moreover, when the gravity ball 4 is in sealing contact with the exhaust pipe 2, the sealing gasket 3 and the exhaust pipe 2 are sealed and connected.

[0039] Therefore, the pressure valve assembly of the utility model can slide up and down in the channel 11 by setting the exhaust pipe 2. Figure 5 When the cooking chamber is under negative pressure or normal pressure, the cooking chamber has no force on the exhaust pipe 2. The exhaust pipe 2 slides down into the channel 11 due to its own gravity. The exhaust pipe 2 does not contact the gravity ball 4. The gravity ball 4 contacts the sealing gasket 3 to form a sealing structure. Since the sealing gasket 3 is an elastic structure, the sealing performance between the gravity ball 4 and the sealing gasket 3 is good, so as to create a good negative pressure or normal pressure cooking environment. Figure 4 When the cooking cavity is under positive pressure, the positive pressure overcomes the gravity of the exhaust pipe 2 and pushes the exhaust pipe 2 to slide upward until it contacts the gravity ball 4. The gravity ball 4 and the exhaust pipe 2 form a sealing structure. Due to the upward positive pressure, the rigid gravity ball 4 and the exhaust pipe 2 can be effectively sealed to create a good positive pressure cooking environment. Therefore, the pressure valve assembly of the utility model is applied to the cooking utensil, and the pressure valve assembly has a good sealing effect regardless of whether the cooking utensil is working under positive pressure, normal pressure or negative pressure.

[0040] Furthermore, when cooking under negative pressure or normal pressure, the gravity ball 4 contacts and seals with the elastic sealing gasket 3, and the contact between the two does not produce abnormal noise. When cooking under positive pressure, although the exhaust pipe 2 and the gravity ball 4 are both rigid structures, the setting of the sealing gasket 3 can buffer the upward sliding of the exhaust pipe 2, which can effectively avoid abnormal noise. Therefore, the pressure valve assembly of the utility model can effectively avoid the generation of noise during operation.

[0041] In addition, see Figure 4When the cooking cavity is under positive pressure, the positive pressure overcomes the gravity of the exhaust pipe 2 and pushes the exhaust pipe 2 to slide upward until it contacts the gravity ball 4. At this time, the gravity ball 4 and the sealing gasket 3 are not in contact, and there is a gap between them, which corresponds to the channel 11 of the valve seat 1. Therefore, when the gravity ball 4 and the exhaust pipe 2 are in sealed contact, the sealing gasket 3 and the exhaust pipe 2, and / or the exhaust pipe 2 and the valve seat 1 are sealed, which can ensure that the channel 11 is sealed and avoid the risk of gas leakage in the channel 11.

[0042] Specifically, the outer tube wall of the exhaust pipe 2 is sealedly connected to the inner wall of the valve seat 11 , and the exhaust pipe 2 can slide up and down relative to the valve seat 11 .

[0043] And / or, the outer tube wall of the exhaust pipe 2 is sealedly connected to the inner wall of the sealing gasket 3, and the exhaust pipe 2 can slide up and down relative to the sealing gasket 3. Specifically, the sealing gasket 3 is provided with a through hole 31 that runs through from top to bottom, the exhaust pipe 2 can slide through the through hole 31, and the outer tube wall of the exhaust pipe 2 is in sealed contact with the inner wall of the through hole 31. It should be noted that in order to ensure the smooth sliding of the exhaust pipe 2, the inner wall of the valve seat 11 and / or the inner wall of the sealing gasket 3 are smooth structures.

[0044] Furthermore, since the sealing effect of the pressure valve assembly is achieved by the gravity ball 4 pressing down the sealing gasket 3 or the exhaust pipe 2 due to its own gravity to form a sealing structure, the central axis of the channel 11, the central axis of the exhaust channel 21 and the central axis of the through hole 31 of the utility model coincide with each other, thereby ensuring that the central axis of the channel 11, the central axis of the exhaust channel 21 and the central axis of the through hole 31 are all in a straight line with the center of gravity of the gravity ball 4, so that the connection between the gravity ball 4 and the sealing gasket 3 and the exhaust pipe 2 is tighter, which is beneficial to improving the sealing effect.

[0045] It is worth noting that when the cooking chamber is at negative pressure or normal pressure, the cooking chamber has no force on the exhaust pipe 2, and the exhaust pipe 2 slides down into the channel 11 due to its own gravity. It is necessary to ensure that the exhaust pipe 2 does not fall from the channel 11. When the cooking chamber is at positive pressure, the positive pressure overcomes the gravity of the exhaust pipe 2 and pushes the exhaust pipe 2 to slide upward until it contacts the gravity ball 4. There are two possible situations. The first is that the positive pressure in the cooking chamber is small, and the positive pressure pushes the exhaust pipe 2 to slide up until the top of the exhaust pipe 2 is flush with the top of the sealing gasket 3. The second is that the positive pressure in the cooking chamber is large, and the positive pressure pushes the exhaust pipe 2 to slide up until the top of the exhaust pipe 2 is higher than the top of the sealing gasket 3. In the first case, the exhaust pipe 2 is in the channel 11. However, in the second case, the excessive pressure in the cooking chamber may cause the exhaust pipe 2 to be pushed out of the channel 11 and / or the sealing gasket 3. This situation needs to be avoided.

[0046] For this purpose, see Figure 4 and Figure 5The outer wall of the exhaust pipe 2 of the utility model is provided with a convex portion 22 protruding away from the exhaust pipe 2, and the inner wall of the valve seat 1 is provided with a boss 12 protruding into the channel 11. The boss 12 is arranged corresponding to the convex portion 22, and the boss 12 is located below the convex portion 22. The projection of the boss 12 in the extending direction of the channel 11 and the projection of the convex portion 22 in the extending direction of the channel 11 at least partially overlap. Therefore, when the cooking cavity is under negative pressure or normal pressure, the boss 12 can limit the exhaust pipe 2 from sliding down due to its own gravity, thereby preventing the exhaust pipe 2 from falling from the channel 11.

[0047] Furthermore, the outer diameter of the protrusion 22 is larger than the inner diameter of the sealing gasket 3. Therefore, when the cooking cavity is under positive pressure, the positive pressure overcomes the gravity of the exhaust pipe 2 and pushes the exhaust pipe 2 to slide upward, and the sealing gasket 3 can limit the upward sliding exhaust pipe 3 to prevent the exhaust pipe 3 from flying out of the channel 11 and / or the sealing gasket 3.

[0048] At the same time, when the cooking cavity is at positive pressure and the pressure is relatively high, that is, when the gravity ball 4 is in sealing contact with the exhaust pipe 2, the top end of the protrusion 22 abuts against the bottom end of the sealing gasket 3, so that the sealing between the exhaust pipe 2 and the sealing gasket 3 is further improved.

[0049] The top of the convex part 22 and the bottom of the sealing gasket 3 can be connected by a plane, or a ring can be provided on the top of the convex part 22, and the ring abuts against the bottom surface of the sealing gasket 3 to achieve a sealing effect. In these cases, the impact force of the exhaust pipe 2 on the sealing gasket 3 is vertically upward, which can easily cause the sealing gasket 3 to separate from the surface of the valve seat 1.

[0050] Therefore, the end surface of the abutting convex portion 22 and the end surface of the sealing gasket 3 of the utility model are both inclined surfaces inclined up and down, and the shapes of the two inclined surfaces are adapted. As a result, the impact force of the exhaust pipe 2 on the sealing gasket 3 is inclined toward the side, which has a certain buffering effect and has a small impact on the sealing gasket 3.

[0051] Specifically, the inclined surface of the protrusion 22 and the inclined surface of the sealing gasket 3 can be higher at the end away from the outer wall of the exhaust pipe 2 than at the end close to the outer wall of the exhaust pipe 2. In this case, the angle between the protrusion 22 and the outer wall of the exhaust pipe 2 is an acute angle, which is not convenient for processing, and when the exhaust pipe 2 impacts upward, the large impact force easily breaks the connection between the protrusion 22 and the outer wall of the exhaust pipe 2.

[0052] Preferably, see Figure 4 and Figure 5 The inclined surface of the protrusion 22 and the inclined surface of the sealing gasket 3 are both lower at the end away from the outer wall of the exhaust pipe 2 than at the end close to the outer wall of the exhaust pipe 2, which is not only convenient for processing, but also has a large contact area between the protrusion 22 and the outer wall of the exhaust pipe 2, and the connection between the protrusion 22 and the outer wall of the exhaust pipe 2 is more secure.

[0053] As for the specific location of the convex portion 22, it can be set according to the gravity of the exhaust pipe 2 and the positive pressure that can be achieved in the cooking cavity. Different cooking utensils have different requirements, so they will not be specifically described here.

[0054] On the basis of the above structure, the sealing gasket 3 is fixedly connected to the valve seat 1 to prevent the sealing gasket 3 from being separated from the valve seat 1 due to the impact force of the exhaust pipe 2. Specifically, the sealing gasket 3 and the valve seat 1 can be fixedly connected by screws, rivets, etc.

[0055] Further, see Figure 2 and Figure 3 The pressure valve assembly further comprises a pressing plate 5, which is pressed on the sealing gasket 3 and fixedly connected to the valve seat 1. The pressing plate 5 is provided with a groove 51 which runs through the upper and lower parts. The gravity ball 4 is arranged in the groove 51 and seals the sealing gasket 3 or the exhaust pipe 2. Thus, the arrangement of the pressing plate 5 can make the fixed connection between the sealing gasket 3 and the valve seat 1 more stable.

[0056] It should be noted that the side wall of the pressing plate 5 can be a continuous structure, or the side wall can be divided into multiple sections and arranged at intervals, or a circle of blocking members can be placed at intervals on the bottom plate of the pressing plate 5, as long as a groove 51 can be formed in the middle of the pressing plate 5.

[0057] The inner wall of the groove 51 is provided with an arc structure adapted to the outer circumference of the gravity ball 4 , so that the gravity ball 4 can be stably placed in the groove 51 to ensure the sealing effect between the gravity ball 4 and the sealing gasket 3 or the exhaust pipe 2 .

[0058] In addition, the positive pressure in the cooking cavity is relatively large, and the positive pressure pushes the exhaust pipe 2 to slide upward until the top of the exhaust pipe 2 is higher than the top of the sealing pad 3, and may push the gravity ball 4 to move upward out of the groove 51, affecting the sealing connection between the gravity ball 4 and the exhaust pipe 3. Therefore, the pressure valve assembly also includes a ball cover 6, which is set on the gravity ball 4, and the ball cover 6 is fixedly connected to the valve seat 1, so as to limit the gravity ball 4 through the ball cover 6. Specifically, a limiting ring 9 can be sleeved on the outer periphery of the lower end of the ball cover 6 to improve the firmness of the connection between the ball cover 6 and the valve seat 1.

[0059] When the pressure valve assembly of the above structure is installed on the cover plate 7, the pressure valve assembly passes through the exhaust hole 71 of the cover plate 7, and the pressure valve assembly and the cover plate 7 are connected by a sealing ring 8 to improve the sealing performance of the connection between the pressure valve assembly and the cover plate 7. Specifically, the valve seat 1 passes through the exhaust hole 71, the sealing sleeve of the outer wall of the valve seat 1 is provided with a sealing ring 8, and the sealing ring 8 is sealed and connected to the hole wall of the exhaust hole 71.

[0060] The technical means disclosed in the solution of the utility model are not limited to the technical means disclosed in the above-mentioned implementation mode, but also include technical solutions composed of any combination of the above technical features. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principle of the utility model, and these improvements and modifications are also regarded as the protection scope of the utility model.

Claims

1. A pressure valve assembly, characterized in that: include: A valve seat (1), an exhaust pipe (2), a sealing gasket (3) and a gravity ball (4), wherein the valve seat (1) is provided with a channel (11) penetrating vertically, the exhaust pipe (2) is slidably arranged in the channel (11), the exhaust pipe (2) is provided with an exhaust channel (21) penetrating vertically, the sealing gasket (3) is arranged on the top of the valve seat (1), and the exhaust pipe (2) is slidably passed through the sealing gasket (3); The gravity ball (4) is arranged above the sealing gasket (3) and the exhaust pipe (2). Under the action of gravity, the gravity ball (4) is in sealing contact with the sealing gasket (3) or the exhaust pipe (2) to close the exhaust passage (21); When the gravity ball (4) is in sealing contact with the exhaust pipe (2), the sealing gasket (3) and the exhaust pipe (2), and / or the exhaust pipe (2) and the valve seat (1) are sealed and connected.

2. The pressure valve assembly according to claim 1, characterized in that: The outer tube wall of the exhaust pipe (2) is provided with a convex portion (22) protruding away from the exhaust pipe (2), and the inner wall of the valve seat (1) is provided with a boss (12) protruding into the channel (11), the boss (12) and the convex portion (22) are arranged correspondingly, and the boss (12) is located below the convex portion (22), and the projections of the boss (12) and the convex portion (22) in the extension direction of the channel (11) at least partially overlap.

3. The pressure valve assembly according to claim 2, characterized in that: The outer diameter of the protrusion (22) is greater than the inner diameter of the sealing gasket (3).

4. The pressure valve assembly according to claim 3, characterized in that: When the gravity ball (4) is in sealing contact with the exhaust pipe (2), the top end of the protrusion (22) abuts against the bottom end of the sealing gasket (3).

5. The pressure valve assembly according to claim 4, characterized in that: The end surface of the abuttingly connected protrusion (22) and the end surface of the sealing gasket (3) are both inclined surfaces that are inclined up and down, and the shapes of the two inclined surfaces are matched.

6. The pressure valve assembly according to claim 5, characterized in that: The end of the inclined surface away from the outer tube wall of the exhaust pipe (2) is lower than the end of the inclined surface close to the outer tube wall of the exhaust pipe (2).

7. The pressure valve assembly according to claim 1 or 3, characterized in that: The sealing gasket (3) is provided with a through hole (31) which passes through from top to bottom, and the exhaust pipe (2) can slide through the through hole (31), and the outer tube wall of the exhaust pipe (2) is in sealed contact with the inner wall of the through hole (31).

8. The pressure valve assembly according to claim 7, characterized in that: The central axis of the channel (11), the central axis of the exhaust channel (21) and the central axis of the through hole (31) coincide with each other.

9. The pressure valve assembly according to claim 1, characterized in that: The pressure valve assembly further comprises a pressure plate (5), wherein the pressure plate (5) is pressed onto the sealing gasket (3) and is fixedly connected to the valve seat (1), wherein the pressure plate (5) is provided with a groove (51) extending vertically therethrough, and the gravity ball (4) is arranged in the groove (51) and is in sealing contact with the sealing gasket (3) or the exhaust pipe (2).

10. The pressure valve assembly according to claim 9, characterized in that: The inner wall of the groove (51) is provided with an arc-shaped structure that matches the outer circumference of the gravity ball (4).

11. The pressure valve assembly according to claim 1, characterized in that: The pressure valve assembly further comprises a ball cover (6), wherein the ball cover (6) is disposed on the gravity ball (4), and the ball cover (6) is fixedly connected to the valve seat (1).

12. A cover assembly, characterized in that: It comprises a cover plate (7) and a pressure valve assembly as claimed in any one of claims 1 to 11, wherein the cover plate (7) is provided with an exhaust hole (71) which passes through the cover plate (7) from top to bottom, the pressure valve assembly is arranged at the exhaust hole (71), and the pressure valve assembly and the cover plate (7) are sealed and fixedly connected.

13. A cooking utensil, characterized in that: It comprises a pot body (200) and an upper cover assembly (100) as claimed in claim 12, wherein the upper cover assembly (100) is rotatably mounted on the pot body (200) to open or close a cooking cavity.

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