CN112568728A

CN112568728A - Exhaust valve assembly, pot cover and cooking utensil

Info

Publication number: CN112568728A
Application number: CN201910933133.7A
Authority: CN
Inventors: 杨云; 程志喜; 吕伟刚; 许颖华; 梅若愚; 韩平英
Original assignee: Foshan Shunde Midea Electrical Heating Appliances Manufacturing Co Ltd
Current assignee: Foshan Shunde Midea Electrical Heating Appliances Manufacturing Co Ltd
Priority date: 2019-09-29
Filing date: 2019-09-29
Publication date: 2021-03-30
Anticipated expiration: 2039-09-29
Also published as: CN112568728B

Abstract

The invention discloses a vent valve assembly, a pot cover and a cooking appliance, wherein the vent valve assembly is provided with a vent channel and comprises: an exhaust valve having a first sealing portion adapted to open and close a passage port of the exhaust passage; a second seal at least partially disposed within the exhaust passage, the second seal adapted to block and unblock the exhaust passage. According to the exhaust valve assembly provided by the embodiment of the invention, the first sealing part and the second sealing part are arranged, so that double sealing of the exhaust channel can be realized, the sealing performance of the exhaust channel is effectively improved, and poor sealing of the exhaust channel caused by installation errors, aging deformation and the like is avoided.

Description

Exhaust valve assembly, pot cover and cooking utensil

Technical Field

The invention relates to the technical field of cooking appliances, in particular to an exhaust valve assembly, a pot cover and a cooking appliance.

Background

In the related art, exhaust valve passes through exhaust valve silica gel tip cone shutoff exhaust passage, however in the production installation, exhaust valve silica gel tip cone exists crooked phenomenon to exhaust valve silica gel tip cone self probably has deformation or ageing, causes sealed badly, especially when vacuum cooking, and is high to sealed requirement, and the problem that is difficult to produce the vacuum appears easily in current seal structure.

Disclosure of Invention

The present invention is directed to solving at least one of the problems of the prior art. Therefore, the invention provides the exhaust valve assembly, which realizes double sealing of the exhaust channel and solves the problem of poor sealing.

The invention also provides a cooker cover with the exhaust valve component.

The invention also provides a cooking appliance with the pot cover.

According to an embodiment of the present invention, a vent valve assembly having a vent passage and comprising: an exhaust valve having a first sealing portion adapted to open and close a passage port of the exhaust passage; a second seal at least partially disposed within the exhaust passage, the second seal adapted to block and unblock the exhaust passage.

According to the exhaust valve assembly provided by the embodiment of the invention, the first sealing part and the second sealing part are arranged, so that double sealing of the exhaust channel can be realized, the sealing performance of the exhaust channel is effectively improved, and poor sealing of the exhaust channel caused by installation errors, aging deformation and the like is avoided.

In addition, the exhaust valve assembly according to the above embodiment of the present invention may further have the following additional technical features:

according to some embodiments of the present invention, the exhaust passage is formed with a sealing portion mating surface having a communication hole, and the second sealing portion is provided to the sealing portion mating surface and may close the communication hole to block the exhaust passage or leave the communication hole to communicate the exhaust passage.

Further, the second sealing part comprises a sealing ball, and the sealing part matching surface is integrally constructed into an arc-shaped surface which is far away from the first sealing part, sunken and matched with the outer surface of the sealing ball.

In some embodiments of the invention, a flexible seal is provided between the second seal portion and the seal portion mating surface.

Further, the flexible seal member is disposed on an outer surface of the second seal portion or the seal portion mating surface.

According to some embodiments of the invention, the exhaust passage comprises: a first passage, a second passage, and a connecting passage, a flow area of the first passage being larger than a flow area of the second passage, the connecting passage communicating the first passage and the second passage, an inner peripheral surface of the connecting passage being formed as the seal portion mating surface.

According to some embodiments of the invention, the vent valve assembly comprises: the exhaust valve core is internally provided with a valve core channel; the lifting shaft is arranged at the lower part of the exhaust valve core, a lifting shaft channel communicated with the valve core channel is arranged in the lifting shaft, the valve core channel and the lifting shaft channel form the exhaust channel, and the second sealing part is arranged in the lifting shaft channel.

Further, the first passage, the second passage, and the connection passage are formed on the hanger shaft passage, and the first passage is connected to the spool passage.

Further, the lower portion of the exhaust valve spool is inserted into the upper portion of the hanger shaft passage, and the maximum size of the second sealing portion is larger than the diameter of the spool passage.

Further, when the second sealing portion cuts off the exhaust passage, a distance between a lowest point of the exhaust valve core and a highest point of the second sealing portion is L, and L satisfies: l is more than or equal to 0.5mm and less than or equal to 10 mm.

According to some embodiments of the invention, the lower portion of the exhaust valve core is provided with a gas passing channel, and the gas passing channel is communicated with the hanger shaft channel and the valve core channel.

Furthermore, the air passing channel is a notch arranged on the side wall of the lower part of the exhaust valve core.

According to some embodiments of the invention, a seal is provided between an upper portion of the hanger shaft passage and a lower portion of the exhaust valve cartridge for sealing a gap therebetween.

In some embodiments, a first mounting groove is formed in the upper portion of the hanger shaft channel, the opening of the first mounting groove faces the outer side wall of the exhaust valve core, and the sealing element is arranged between the first mounting groove and the outer side wall of the exhaust valve core; or the outer side wall of the exhaust valve core is provided with a second mounting groove, the opening of the second mounting groove faces the inner side wall of the hanging shaft, and the sealing element is arranged between the second mounting groove and the inner side wall of the hanging shaft.

In other embodiments, a first installation groove is formed in an upper portion of the hanger shaft passage, a second installation groove opposite to the first installation groove is formed in a lower portion of the exhaust valve core, the first installation groove is communicated with the second installation groove, and the sealing member is embedded in the first installation groove and the second installation groove.

In some embodiments of the present invention, the exhaust valve assembly further includes a magnetic coil, the magnetic coil is sleeved on the exhaust valve core, the exhaust valve is a magnetic valve, the first sealing portion is disposed in the magnetic valve, the magnetic valve is located in a magnetic field generated by energizing the magnetic coil so that the first sealing portion opens and closes the exhaust passage, and the hanger shaft is located below the magnetic coil.

A pot cover according to an embodiment of the present invention includes a vent valve assembly according to an embodiment of the present invention.

A cooking appliance according to an embodiment of the present invention includes a pot cover according to an embodiment of the present invention.

Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.

Drawings

The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:

fig. 1 is a schematic structural view of a cooking appliance according to an embodiment of the present invention;

FIG. 2 is an enlarged schematic view of FIG. 1 at block A;

FIG. 3 is a schematic structural view of a hanger shaft of a vent valve assembly according to an embodiment of the invention;

fig. 4 is a schematic structural view of an exhaust valve spool of an exhaust valve assembly according to an embodiment of the present invention.

Reference numerals:

a cooking appliance 200; a pot cover 210;

a discharge valve assembly 100;

an exhaust passage 101; a passage opening 102; a seal mating surface 103; a communication hole 104; an exhaust valve spool 11; a spool passage 111; a gas passage 112; a second mounting groove 115; a hanger shaft 12; a hanger shaft passage 121; a first passage 122; a second channel 123; a connecting passage 124; a first mounting groove 125; a seal 13; a magnetic coil 14;

an exhaust valve 20; a first seal portion 21; a sealing cone 211; a magnetic valve 22;

a second seal portion 30; the ball 31 is sealed.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the accompanying drawings are illustrative only for the purpose of explaining the present invention, and are not to be construed as limiting the present invention.

In the description of the present invention, it is to be understood that the terms "central," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the invention and to simplify the description, and are not intended to indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and are not to be considered limiting of the invention. In the description of the present invention, "the first feature" and "the second feature" may include one or more of the features, and "a plurality" means two or more.

The following describes the discharge valve assembly 100, the pot cover 210 and the cooking appliance 200 according to the embodiment of the present invention with reference to the accompanying drawings.

Referring to fig. 1 and 2, a discharge valve assembly 100 according to an embodiment of the present invention has a discharge passage 101 and includes: a vent valve 20 and a second seal 30.

Specifically, the exhaust valve 20 has a first sealing portion 21, and the first sealing portion 21 can open and close the passage opening 102 of the exhaust passage 101 to control the opening and closing of the exhaust passage 101. The second sealing portion 30 is at least partially disposed in the exhaust passage 101, and the second sealing portion 30 may block and open the exhaust passage 101 to control the opening and closing of the exhaust passage 101.

Accordingly, the exhaust valve assembly 100 can achieve double sealing by the first sealing part 21 and the second sealing part 30, and even if one of the first sealing part 21 and the second sealing part 30 is not sealed well due to factors such as mounting error and aged deformation, the other sealing part can achieve a good sealing effect. And, inside the exhaust passage 101 was located at least partially to second sealing 30, exhaust passage 101 can play certain direction, spacing effect to second sealing 30, made second sealing 30 be difficult for appearing installation error or dislocation, the difficult poor condition of sealing has effectively improved the problem that is difficult to produce the vacuum.

According to the exhaust valve assembly 100 of the embodiment of the invention, the first sealing part 21 and the second sealing part 30 are arranged, so that double sealing of the exhaust channel 101 can be realized, the sealing performance of the exhaust channel 101 is effectively improved, and poor sealing of the exhaust channel 101 caused by installation errors, aging deformation and the like is avoided.

Alternatively, in some embodiments, the second sealing portion 30 is configured to block the exhaust passage 101 at least by gravity, without providing other driving structure for driving the second sealing portion 30 to move to open and block the exhaust passage 101. Optionally, in some embodiments, the second seal 30 blocks the exhaust passage 101 under a gas pressure differential, or blocks the exhaust passage 101 under a combination of gravity and a gas pressure differential. For example, in some embodiments, during the exhaust process of the exhaust valve assembly 100, the second sealing portion 30 conducts the exhaust channel 101 under the action of the exhaust pressure, when the exhaust process is not performed, the second sealing portion 30 automatically blocks the exhaust channel 101 under the action of its own weight, and during the vacuum cooking process, the second sealing portion 30 is tightly fitted with the exhaust channel 101 under the combined action of the internal and external pressure differences and its own weight to improve the sealing effect of blocking the exhaust channel 101.

Further, as shown in fig. 2 and 3, the exhaust passage 101 is formed with a sealing part mating surface 103, the sealing part mating surface 103 has a communication hole 104, the second sealing part 30 is provided to the sealing part mating surface 103, and the second sealing part 30 may close the communication hole 104 to block the exhaust passage 101; or the second sealing portion 30 may be separated from the communication hole 104 to communicate the gas discharge passage 101. Alternatively, the sealing portion mating surface 103 may be configured in an annular shape, and the second sealing portion 30 may be in line contact or surface contact with the annular sealing portion mating surface 103 to achieve sealing, which is more effective.

In some embodiments of the present invention, as shown in FIG. 3, the second seal 30 includes a sealing ball 31, the seal mating surface 103 is integrally configured as an arcuate surface that is recessed further away from the first seal 21 and that conforms to an outer surface of the sealing ball 31

From this, the surface and the arcwall face sealing contact of ball sealer 31 to ball sealer 31 can be in arbitrary direction and angle and arcwall face sealing contact well, guarantees that ball sealer 31 rolls down from optional position and can both cut off exhaust passage 101 well, improves sealing reliability. And, in the moving process of the sealing ball 31, the arc-shaped surface can play a guiding role for the sealing ball 31, so that the sealing ball 31 can move to the communication hole 104 more accurately to block the exhaust passage 101. Alternatively, in some embodiments, as shown in fig. 3, the sealing portion mating surface 103 is integrally configured as an inverted frustoconical surface.

Alternatively, the sealing ball 31 may be a metal ball, such as a stainless steel ball, which is structurally stable and thus will not age and deform with the use time, and thus is not prone to poor sealing.

According to some embodiments of the present invention, a flexible sealing member may be disposed between the second sealing portion 30 and the sealing portion mating surface 103, and the flexible sealing member has good elasticity, and may effectively seal a mating gap between the second sealing portion 30 and the sealing portion mating surface 103, so as to further improve the sealing performance. Alternatively, the flexible seal may be a rubber or silicone piece.

The arrangement structure of the flexible sealing member is not particularly limited in the present invention, and alternatively, the flexible sealing member may be arranged on the outer surface of the second sealing portion 30 or on the sealing portion mating surface 103 to prevent the flexible sealing member from being misaligned to affect the sealing effect. For example, in embodiments where the second sealing portion 30 includes a sealing ball 31, a flexible seal may be wrapped around the outer surface of the sealing ball 31. For another example, in an embodiment where the sealing portion mating surface 103 is an arc-shaped surface, the flexible sealing member may be an arc-shaped cylinder attached to the arc-shaped surface.

According to some embodiments of the present invention, as shown in fig. 2 and 3, the exhaust passage 101 includes: a first passage 122, a second passage 123, and a connecting passage 124, wherein the flow area of the first passage 122 is larger than the flow area of the second passage 123, the connecting passage 124 communicates the first passage 122 and the second passage 123, and the inner peripheral surface of the connecting passage 124 is formed as the seal portion mating surface 103. Alternatively, the opening at the junction of the connecting channel 124 and the second channel 123 may be formed as the communicating hole 104.

Thus, the maximum dimension of the second sealing portion 30 (e.g., the diameter of the sealing ball 31) is greater than the diameter of the second passage 123 and less than the diameter of the first passage 122. When the second sealing part 30 moves into the first passage 122 with a large flow area, the second sealing part 30 cannot be completely in sealing contact with the inner circumferential surface of the first passage 122, the exhaust passage 101 can be conducted, and the flow resistance of exhaust gas is reduced; the second sealing portion 30 is at least partially moved to the connecting passage 124, so that when the second sealing portion 30 is in sealing contact with the inner circumferential surface of the connecting passage 124, the second sealing portion 30 blocks the exhaust passage 101, and the second passage 123 with a small flow area can prevent the second sealing portion 30 from falling off the exhaust passage 101, thereby achieving a good limiting effect.

In some embodiments of the present invention, as shown with reference to fig. 2-4, the exhaust valve assembly 100 further includes an exhaust valve spool 11 and a hanger shaft 12. Wherein, a valve core channel 111 is arranged in the exhaust valve core 11, a hanging shaft 12 is arranged at the lower part of the exhaust valve core 11, a hanging shaft channel 121 communicated with the valve core channel 111 is arranged in the hanging shaft 12, the valve core channel 111 and the hanging shaft channel 121 form an exhaust channel 101, and the second sealing part 30 is arranged in the hanging shaft channel 121.

Therefore, when assembling, the second sealing part 30 can be firstly placed in the hanging shaft channel 121, and then the exhaust valve core 11 and the hanging shaft 12 are installed together, and the second sealing part 30 is assembled more easily.

It should be noted that in the embodiment where the exhaust passage 101 includes the first passage 122, the second passage 123 and the connection passage 124, the first passage 122, the second passage 123 and the connection passage 124 may be formed on the hanger shaft passage 121, wherein the first passage 122 is connected to the spool passage 111, so that the connection is easier and the installation is more convenient. In other embodiments, the inner circumferential surface of the hanger shaft passage 121 may be integrally formed as an arc surface, and the inner circumferential surface of the hanger shaft passage 121 is integrally formed as the sealing part mating surface 103, which may also realize that the second sealing part 30 blocks the hanger shaft passage 121 to block the exhaust passage 101.

Further, as shown in fig. 2, the lower portion of the exhaust valve spool 11 is inserted into the upper portion of the hanger shaft passage 121, and the maximum size of the second sealing portion 30 is larger than the diameter of the spool passage 111. The exhaust valve core 11 can limit the second sealing part 30 from the upper side, so as to prevent the second sealing part 30 from falling off from the hanger shaft channel 121 from the upper side, and the form that the exhaust valve core 11 is connected with the hanger shaft 12 in an inserting manner is beneficial to improving the matching area of the exhaust valve core 11 and the hanger shaft 12, and improving the sealing performance of the communication between the valve core channel 111 and the hanger shaft channel 121. Alternatively, the lower portion of the exhaust valve core 11 may be screwed with the upper portion of the hanger shaft 12, so that the exhaust valve core 11 and the hanger shaft 12 are reliably connected, and the sealing property of the connection of the exhaust valve core 11 and the hanger shaft 12 is further improved.

According to a further embodiment of the present invention, as shown in fig. 2, when the second sealing portion 30 blocks the exhaust passage 101, a distance between a lowest point of the exhaust valve body 11 and a highest point of the second sealing portion 30 is L, and L satisfies: l is more than or equal to 0.5mm and less than or equal to 10 mm. For example, in some embodiments, the distances L between the lowest point of the exhaust valve core 11 and the highest point of the second sealing portion 30 may be 1mm, 2mm, 3mm, 4mm, 5mm, 6mm, 7mm, 8mm, 9mm, and the like.

Therefore, in the process of exhausting the exhaust valve assembly 100, the second sealing part 30 has enough moving space upwards, so that the second sealing part 30 can be normally jacked up, and the second sealing part 30 is separated from the sealing part matching surface 103, thereby not influencing normal exhaust.

In some embodiments of the present invention, as shown in fig. 2 and 4, a gas passing channel 112 is provided at a lower portion of the exhaust valve spool 11, and the gas passing channel 112 communicates with the hanger shaft channel 121 and the spool channel 111. When the second sealing portion 30 is lifted and contacts with the lower end of the exhaust valve core 11, the gas in the hanger shaft passage 121 can still enter the valve core passage 111 through the gas passing passage 112, preventing the second sealing portion 30 from forming a seal with the exhaust valve core 11 and preventing the exhaust from being disabled.

The specific structure of the air passing channel 112 is not limited in the present invention, and alternatively, in some embodiments, as shown in fig. 4, the air passing channel 112 may be a notch formed in the lower side wall of the exhaust valve core 11. The gas in the hanger shaft passage 121 can enter the gas passing passage 112 through the lower opening of the notch, then enter the valve core passage 111 through the inner opening of the notch, and finally exit the exhaust valve assembly 100. The air passage 112 has a simple structure and is easy to process, and air can smoothly enter the valve core passage 111 from the hanger shaft passage 121, so that the flow resistance is small.

According to some embodiments of the present invention, as shown in fig. 2, a sealing member 13 may be disposed between an upper portion of the hanger shaft passage 121 and a lower portion of the exhaust valve core 11, and the sealing member 13 may seal a gap between the lower portion of the exhaust valve core 11 and an inner circumferential surface of the hanger shaft passage 121 to further improve sealability and prevent gas leakage.

Optionally, in some embodiments, the upper portion of the hanger shaft channel 121 may be provided with a first mounting groove 125, an opening of the first mounting groove 125 faces the outer side wall of the exhaust valve core 11, a sealing element 13 may be disposed between the first mounting groove 125 and the outer side wall of the exhaust valve core 11, and the first mounting groove 125 may limit the sealing element 13, which is beneficial to improving the sealing effect. In other embodiments, the outer side wall of the exhaust valve core 11 is provided with a second mounting groove 115, an opening of the second mounting groove 115 faces the inner side wall of the hanger shaft 12, a sealing element 13 may be arranged between the second mounting groove 115 and the inner side wall of the hanger shaft 12, and the second mounting groove 115 may limit the sealing element 13, which is beneficial to improving the sealing effect.

In still other embodiments, as shown in fig. 2 to 4, the upper portion of the hanger shaft passage 121 may be provided with a first mounting groove 125, the lower portion of the exhaust valve spool 11 may be provided with a second mounting groove 115, the second mounting groove 115 is opposite to the first mounting groove 125, and the second mounting groove 115 communicates with the first mounting groove 125, so that the sealing member 13 may be simultaneously inserted into the first mounting groove 125 and the second mounting groove 115. Therefore, not only the position limitation of the sealing element 13 can be realized, but also the depth of the exhaust valve core 11 inserted into the hanger shaft channel 121 can be limited by the sealing element 13, so that the second sealing part 30 has enough moving space in the hanger shaft channel 121 to conduct and block the exhaust channel 101.

According to some embodiments of the present invention, as shown in fig. 2, the exhaust valve assembly 100 further includes a magnetic coil 14, the magnetic coil 14 is sleeved on the exhaust valve core 11, the hanging shaft 12 is located below the magnetic coil 14, the exhaust valve 20 is a magnetic valve 22, and the first sealing portion 21 is disposed in the magnetic valve 22. The magnetic valve 22 is located in the magnetic field generated by energizing the magnetic coil 14, so that the magnetic valve 22 can move under the action of the magnetic field, and the first sealing portion 21 opens and closes the passage opening 102 of the exhaust passage 101. The first sealing part 21 is simple and convenient to control for opening and closing the exhaust passage 101, and does not need manual operation of a user.

According to some embodiments of the invention, as shown in fig. 2, the first sealing portion 21 has a sealing cone 211, and the sealing cone 211 can be in sealing contact with the rim of the passage opening 102. Because the sealing conical surface 211 extends obliquely downward and inward relative to the vertical direction, when the sealing conical surface 211 is inserted into the passage opening 102, the edge of the passage opening 102 can cooperate with the sealing conical surface 211 to provide a certain guiding function for the first sealing portion 21, so as to improve the poor sealing condition between the first sealing portion 21 and the passage opening 102.

The pot cover 210 according to an embodiment of the present invention includes the discharge valve assembly 100 according to an embodiment of the present invention. Since the exhaust valve assembly 100 according to the embodiment of the present invention has the above-mentioned beneficial technical effects, the lid 210 according to the embodiment of the present invention can realize double sealing of the exhaust passage 101 by providing the first sealing part 21 and the second sealing part 30, thereby effectively improving the sealing performance of the exhaust passage 101 and avoiding poor sealing of the exhaust passage 101 due to installation error or aging deformation.

The cooking appliance 200 according to the embodiment of the present invention includes a pot cover 210 according to the embodiment of the present invention. Since the pot cover 210 according to the embodiment of the present invention has the above-mentioned beneficial technical effects, according to the cooking utensil 200 according to the embodiment of the present invention, by providing the first sealing part 21 and the second sealing part 30, double sealing of the exhaust passage 101 can be achieved, the sealing performance of the exhaust passage 101 is effectively improved, and poor sealing of the exhaust passage 101 due to installation error, aging deformation, or the like is avoided.

Other constructions and operations of the cooking appliance 200, the lid 210 and the exhaust valve assembly 100 according to the embodiment of the present invention are known to those skilled in the art and will not be described in detail herein.

In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

In the description herein, references to the description of the terms "embodiment," "particular embodiment," "example," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

While embodiments of the invention have been shown and described, it will be understood by those of ordinary skill in the art that: various changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A vent valve assembly, the vent valve assembly having a vent passage and comprising:

an exhaust valve having a first sealing portion adapted to open and close a passage port of the exhaust passage;

a second seal at least partially disposed within the exhaust passage, the second seal adapted to block and unblock the exhaust passage.

2. The discharge valve assembly according to claim 1, wherein said discharge passage is formed with a sealing portion mating surface having a communication hole, and said second sealing portion is provided to said sealing portion mating surface and closes said communication hole to block said discharge passage or to leave said communication hole to conduct said discharge passage.

3. The discharge valve assembly according to claim 2, wherein said second seal includes a sealing ball, said seal mating surface being integrally configured as an arcuate surface recessed away from said first seal and conforming to an outer surface of said sealing ball.

4. The discharge valve assembly of claim 2, wherein a flexible seal is disposed between said second sealing portion and said sealing portion mating surface.

5. The vent valve assembly of claim 4, wherein the flexible seal is disposed on an outer surface of the second sealing portion or the sealing portion mating surface.

6. The discharge valve assembly of claim 2, wherein said discharge passage comprises:

a first passage, a second passage, and a connecting passage, a flow area of the first passage being larger than a flow area of the second passage, the connecting passage communicating the first passage and the second passage, an inner peripheral surface of the connecting passage being formed as the seal portion mating surface.

7. The discharge valve assembly of claim 6, comprising:

the exhaust valve core is internally provided with a valve core channel;

the lifting shaft is arranged at the lower part of the exhaust valve core, a lifting shaft channel communicated with the valve core channel is arranged in the lifting shaft, the valve core channel and the lifting shaft channel form the exhaust channel, and the second sealing part is arranged in the lifting shaft channel.

8. The vent valve assembly of claim 7, wherein the first passage, second passage, and connecting passage are formed on the hanger shaft passage, the first passage being connected to the spool passage.

9. The vent valve assembly of claim 7, wherein a lower portion of the vent spool is inserted into an upper portion of the hanger shaft passage, and a maximum dimension of the second sealing portion is greater than a diameter of the spool passage.

10. The exhaust valve assembly according to claim 9 wherein the distance between the lowest point of the exhaust valve spool and the highest point of the second sealing portion is L and L satisfies: l is more than or equal to 0.5mm and less than or equal to 10 mm.

11. The vent valve assembly of claim 7, wherein a lower portion of the vent spool defines a vent passage that communicates between the hanger shaft passage and the spool passage.

12. The exhaust valve assembly according to claim 11 wherein said air passage is a notch in a lower sidewall of said exhaust valve spool.

13. The vent valve assembly of claim 7, wherein a seal is disposed between an upper portion of the hanger shaft passage and a lower portion of the vent spool for sealing a gap therebetween.

14. The exhaust valve assembly according to claim 13, wherein a first mounting groove is formed in an upper portion of the hanger shaft channel, an opening of the first mounting groove faces an outer side wall of the exhaust valve core, and the sealing member is arranged between the first mounting groove and the outer side wall of the exhaust valve core; or the outer side wall of the exhaust valve core is provided with a second mounting groove, the opening of the second mounting groove faces the inner side wall of the hanging shaft, and the sealing element is arranged between the second mounting groove and the inner side wall of the hanging shaft.

15. The discharge valve assembly of claim 13, wherein the upper portion of the hanger shaft passage is provided with a first mounting groove, the lower portion of the discharge valve spool is provided with a second mounting groove opposite to the first mounting groove, the first mounting groove communicates with the second mounting groove, and the sealing member is fitted into the first mounting groove and the second mounting groove.

16. The vent valve assembly of claim 7, further comprising:

the magnetic coil is sleeved outside the exhaust valve core, the exhaust valve is a magnetic valve, the first sealing portion is arranged in the magnetic valve, the magnetic valve is located in a magnetic field generated by electrifying the magnetic coil so that the first sealing portion can open and close the exhaust channel, and the hanging shaft is located below the magnetic coil.

17. A lid for a pot comprising the vent valve assembly of any one of claims 1-16.

18. A cooking appliance comprising the lid of claim 17.