CN216907611U

CN216907611U - Pot cover assembly and pressure vessel

Info

Publication number: CN216907611U
Application number: CN202123104119.8U
Authority: CN
Inventors: 伍荣春; 杨建耀
Original assignee: Guangdong Galanz Enterprises Co Ltd; Guangdong Galanz Microwave Electric Manufacturing Co Ltd
Current assignee: Guangdong Galanz Enterprises Co Ltd; Guangdong Galanz Microwave Electric Manufacturing Co Ltd
Priority date: 2021-12-11
Filing date: 2021-12-11
Publication date: 2022-07-08
Anticipated expiration: 2031-12-11

Abstract

The utility model relates to a pot cover assembly and a pressure vessel, comprising: the cover body is provided with a first mounting through hole and a second mounting through hole; the pressure relief valve is arranged in the first installation through hole; the pressure floater is arranged in the second mounting through hole, an auxiliary exhaust channel is arranged in the pressure floater, and the auxiliary exhaust channel is communicated with the inner side space and the outer side space of the cover body; the plugging plug is plugged in the auxiliary exhaust passage, and when the pressure in the inner side space of the cover body is larger than a preset high pressure value, the plugging plug can move to the position where the auxiliary exhaust passage is communicated relative to the pressure float, and the preset high pressure value is larger than the set pressure of the pressure release valve. When the pressure in the inner side space of the cover body reaches the set pressure of the pressure release valve, if the pressure release valve works abnormally, the pressure release valve cannot be opened, when the pressure in the inner side space of the cover body exceeds a preset high pressure value, the plugging plug can move to the position where the auxiliary exhaust channel is conducted, the pressure release is carried out by utilizing the auxiliary exhaust channel, and the condition that the pressure in the inner side space of the cover body is too large is avoided.

Description

Pot cover assembly and pressure vessel

Technical Field

The utility model relates to the technical field of cooking appliances, in particular to a pot cover assembly and a pressure vessel.

Background

The pressure household utensils can form high pressure environment inside for the food that inside was placed can cook under higher temperature, and food cooks more thoroughly. The pressure vessel generally comprises a pot body and a pot cover, the pot cover can be tightly buckled on the pot body, a pressure release valve is further arranged on the pot cover, and the pressure release pressure of the pressure release valve determines the highest pressure value which can be reached in the pressure vessel. When the pressure in the pressure vessel is higher than the allowed maximum pressure value, the pressure relief valve is switched to a pressure relief state to communicate the inner space and the outer space of the pressure vessel. However, when the pressure relief valve is damaged and the pressure relief process cannot be carried out, the pressure in the pressure vessel exceeds the allowed highest pressure value, so that great potential safety hazard is brought.

SUMMERY OF THE UTILITY MODEL

The utility model provides a pot cover assembly and a pressure vessel aiming at the problem of great potential safety hazard in the use of the pressure vessel, so as to avoid the situation that the pressure in the pressure vessel is too high in the process that a pressure release valve cannot release pressure, and improve the use safety.

A lid assembly, comprising:

the cover body is provided with a first mounting through hole and a second mounting through hole;

the pressure relief valve is arranged in the first mounting through hole;

the pressure floater is arranged in the second mounting through hole, an auxiliary exhaust channel is arranged in the pressure floater, and the auxiliary exhaust channel is communicated with the inner side space and the outer side space of the cover body;

and the sealing plug is plugged in the auxiliary exhaust channel, and when the pressure in the space inside the cover body is greater than a preset high-pressure value, the sealing plug can move to the position where the auxiliary exhaust channel is communicated relative to the pressure float, and the preset high-pressure value is greater than the set pressure of the pressure release valve.

Above-mentioned scheme provides a pot cover subassembly, and in the normal use process, supplementary exhaust passage in the pressure float by the shutoff of shutoff stopper, along with pressure in the inboard space of lid crescent, when pressure in the inboard space of lid reaches the set pressure of relief valve, the relief valve opens the pressure release. And if the decompression valve works abnormally and cannot be opened for decompression, when the pressure of the inner side space of the cover body exceeds the preset high pressure value, the sealing plug can move to the position where the auxiliary exhaust passage is conducted, so that the auxiliary exhaust passage is utilized for decompression, the phenomenon that the pressure of the inner side space of the cover body is overlarge is avoided, and the use safety is improved.

In one embodiment, the sealing plug further comprises a flexible connecting piece, wherein at least one of the cover body, the pressure relief valve and the pressure float is connected with the flexible connecting piece, and the flexible connecting piece is connected with the sealing plug.

In one embodiment, the flexible connection is connected between the pressure float and the plug.

In one embodiment, the plug comprises a plug and a first sealing ring sleeved outside the plug, the plug can be inserted into the auxiliary exhaust channel, and when the plug is inserted into the auxiliary exhaust channel, the first sealing ring is compressed between the plug and the side wall of the auxiliary exhaust channel;

when the pressure in the space inside the cover body is larger than a preset high pressure value, the plug and the first sealing ring can be flushed out of the auxiliary exhaust channel.

In one embodiment, the plug is a rubber plug;

and/or when the plug is inserted into the auxiliary exhaust channel, one end surface of the plug, which faces the inner side of the cover body, is a front end surface, a transition guide surface is formed at the intersection of the front end surface and the peripheral surface of the plug, and the diameter of a space surrounded by the transition guide surface is gradually reduced in the direction close to the front end surface.

In one embodiment, one end of the pressure float is inserted into the inner side of the cover body, and a stop piece is arranged on the part, located on the inner side of the cover body, of the pressure float and is limited on the inner side of the cover body.

In one embodiment, the stopper includes an annular rib surrounding the pressure float, an inner circumferential surface of the annular rib being connected to the pressure float, and an outer diameter of the annular rib being larger than a diameter of the second mounting through-hole.

A pressure vessel comprises a pot body and the pot cover assembly, wherein the cover with the cover body capable of being opened and closed is arranged at an opening of the pot body, and one side, facing the inside of the pot body, of the cover body is the inner side of the cover body.

The above scheme provides a pressure vessel, and at normal culinary art in-process, the lid closes on the pot body, works as pressure in the pot body reaches when the set pressure of relief valve, the relief valve opens the pressure release. And through adopting the pot cover subassembly in any one of the above-mentioned embodiments to if appear pot internal pressure reach the set pressure of relief valve and when the relief valve still can't open the pressure release, along with pot internal pressure further increases, works as pressure is greater than in the pot body during the predetermined high pressure value, the shutoff stopper moves extremely the position that supplementary exhaust passage switched on, thereby utilizes supplementary exhaust passage carries out the pressure release, avoids the too big condition of pot internal pressure takes place, improves the security of using.

In one of them embodiment, pressure vessel still includes interior pot and second sealing washer, interior pot is placed in the pot body, the opening orientation of interior pot the opening part of the pot body, just the opening part of interior pot is equipped with first flanging, on the pot body with the position that first flanging corresponds is equipped with the draw-in groove, second sealing washer cover is in outside and the compressing tightly of interior pot first flanging with between the cell wall of draw-in groove, interior pot with be equipped with the heat preservation between the pot body, the diapire of interior pot with be equipped with the wave absorption board between the heat preservation.

In one embodiment, the pressure vessel further comprises a third sealing ring, a second flanging is arranged at the opening of the pot body, when the cover body covers the opening of the pot body, the second flanging is located on the inner side of the cover body, a boss is arranged on the cover body at a position corresponding to the second flanging, the third sealing ring can be pressed between the boss and the second flanging, and the surface of the boss facing the second flanging is parallel to the surface of the third sealing ring abutted against the boss.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this application, illustrate embodiments of the utility model and, together with the description, serve to explain the utility model and not to limit the utility model.

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.

FIG. 1 is a schematic structural diagram of a pressure vessel according to the present embodiment;

FIG. 2 is a cross-sectional view of the pressure vessel shown in FIG. 1;

FIG. 3 is an exploded view of the pressure vessel shown in FIG. 1;

FIG. 4 is an exploded view of the pressure vessel of FIG. 1 from another perspective;

FIG. 5 is an exploded view of the pressure vessel of FIG. 1 in another disassembled state;

fig. 6 is a schematic structural view of the pressure float according to the present embodiment.

Description of reference numerals:

10. a lid assembly; 11. a cover body; 111. a second mounting through hole; 112. a boss; 12. a pressure relief valve; 13. a pressure float; 131. an auxiliary exhaust passage; 132. a stopper; 14. blocking; 141. a plug; 1411. a front end face; 1412. a transition guide surface; 142. a first seal ring; 143. a limiting disc; 15. a flexible connector; 16. a filter screen; 20. a pressure vessel; 21. a pan body; 211. a card slot; 212. a second outer flanging; 22. an inner pot; 221. a first outward flange; 23. a second seal ring; 24. a heat-insulating layer; 25. a wave absorbing plate; 26. and a third sealing ring.

Detailed Description

In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in detail below. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein.

As shown in fig. 1 to 5, in one embodiment, there is provided a pot lid assembly 10 including:

the cover body 11 is provided with a first mounting through hole and a second mounting through hole 111;

the pressure relief valve 12, the pressure relief valve 12 is arranged in the first mounting through hole;

the pressure floater 13 is arranged in the second mounting through hole 111, an auxiliary exhaust channel 131 is arranged in the pressure floater 13, and the auxiliary exhaust channel 131 is communicated with the inner side space and the outer side space of the cover body 11;

and the plug 14 is plugged in the auxiliary exhaust channel 131, and when the pressure in the space inside the cover body 11 is greater than a preset high-pressure value, the plug 14 can move to a position where the auxiliary exhaust channel 131 is communicated relative to the pressure float 13, and the preset high-pressure value is greater than the set pressure of the relief valve 12.

According to the pot cover assembly 10 provided by the scheme, in a normal use process, the auxiliary exhaust channel 131 in the pressure float 13 is blocked by the blocking plug 14, and as the pressure in the space inside the cover body 11 is gradually increased, when the pressure in the space inside the cover body 11 reaches the set pressure of the pressure release valve 12, the pressure release valve 12 is opened to release the pressure. If the pressure relief valve 12 is abnormal and cannot be opened for pressure relief, when the pressure in the inner side space of the cover 11 exceeds the preset high pressure value, the plug 14 can move to the position where the auxiliary exhaust channel 131 is conducted, so that the auxiliary exhaust channel 131 is used for pressure relief, the situation that the pressure in the inner side space of the cover 11 is too high is avoided, and the use safety is improved.

Specifically, in some embodiments, when the pressure in the space inside the cover 11 is greater than a preset high pressure value, the plug 14 can be flushed out of the auxiliary exhaust channel 131 under the action of the pressure. In other words, when the plug 14 is plugged in the auxiliary exhaust passage 131, the plug 14 is positioned in the auxiliary exhaust passage 131 by friction. As the pressure in the space inside the cover 11 gradually increases, when the pressure reaches a certain value so that the thrust applied to the plug 14 can overcome the friction force, the plug 14 rushes out of the auxiliary exhaust channel 131, so that the auxiliary exhaust channel 131 is conducted.

Alternatively, in other embodiments, the plug 14 may also be moved relative to the pressure float 13 in other ways, so that the auxiliary exhaust channel 131 is open. As long as the trigger condition for the movement of the plug 14 relative to the pressure float 13 is that the pressure in the space inside the cover 11 is greater than the preset high pressure value.

Further specifically, as shown in fig. 2 and 6, in one embodiment, the plug 14 includes a plug 141 and a first sealing ring 142 sleeved outside the plug 141, the plug 141 can be inserted into the auxiliary exhaust channel 131, and when the plug 141 is inserted into the auxiliary exhaust channel 131, the first sealing ring 142 is compressed between the plug 141 and the side wall of the auxiliary exhaust channel 131. At this time, the auxiliary exhaust passage 131 is closed by the plug 141 and the first packing 142. The plug 141 and the first sealing ring 142 are restrained in the auxiliary exhaust passage 131 by means of friction between the first sealing ring 142 and the side wall of the auxiliary exhaust passage 131.

When the pressure in the space inside the cover 11 is greater than a predetermined high pressure value, the plug 141 and the first sealing ring 142 can be flushed out of the auxiliary exhaust channel 131, so that the auxiliary exhaust channel 131 is conducted.

The plug 141 has a diameter smaller than that of the auxiliary discharge passage 131, and the first packing 142 has an outer diameter larger than that of the auxiliary discharge passage 131. So that the plug 141 can be inserted into the auxiliary exhaust passage 131, and the plug 141 sleeved with the first sealing ring 142 can block the auxiliary exhaust passage 131.

Further, as shown in fig. 2 and 6, when one end of the plug 141 is provided with a limiting disc 143, the limiting disc 143 is coaxially arranged with the plug 141, and the outer diameter of the limiting disc 143 is larger than the diameter of the auxiliary exhaust channel 131. When the plug 141 and the first sealing ring 142 are caught in the auxiliary vent passage 131, the catching disc 143 is located outside the pressure float 13.

Further specifically, in one embodiment, the plug 141 is a rubber plug.

Further, as shown in fig. 6, in one embodiment, when the plug 141 is inserted into the auxiliary exhaust passage 131, an end surface of the plug 141 facing the inside of the cover 11 is a front end surface 1411, a transition guide surface 1412 is formed at the intersection of the front end surface 1411 and the outer peripheral surface of the plug 141, and the diameter of a space surrounded by the transition guide surface 1412 is gradually reduced in a direction approaching the front end surface 1411. The provision of the transition guide surface 1412 can facilitate the insertion of the plug 141 into the auxiliary discharge passage 131.

Further, in one embodiment, as shown in fig. 6, the end of the plug 141 connected to the stopper disc 143 is an end away from the transition guide surface 1412. The transition guide surface 1412 and the limiting disc 143 are respectively located at two sides of the first sealing ring 142.

Further, as shown in fig. 1 to 6, in an embodiment, the lid assembly 10 further includes a flexible connecting member 15, at least one of the cover 11, the pressure relief valve 12, and the pressure float 13 is connected to the flexible connecting member 15, and the flexible connecting member 15 is connected to the blocking plug 14.

Further, when the plug 14 is plugged in the auxiliary exhaust passage 131 or moved to a position where the auxiliary exhaust passage 131 is opened, the plug 14 is indirectly connected to at least one of the lid 11, the relief valve 12, and the pressure float 13 via the flexible connection member 15.

In particular, when the plug 14 is limited in the auxiliary exhaust channel 131 by friction, the flexible connection element 15 can limit the plug 14 within a certain range of motion when the plug 14 is flushed out of the auxiliary exhaust channel 131 by high-pressure gas as the pressure in the space inside the cover 11 increases, thereby avoiding injury to people after the plug 14 is flushed out.

In particular, in one embodiment, the flexible connection 15 is connected between the pressure float 13 and the plug 14.

More specifically, as shown in fig. 1 to 6, one end of the flexible connecting member 15 is directly connected to the pressure float 13, and the other end of the flexible connecting member 15 is directly connected to the limiting disc 143, and is indirectly connected to the plug 14 through the limiting disc 143.

Further, in one embodiment, as shown in fig. 2, 4, 5 and 6, one end of the pressure float 13 is inserted into the inner side of the cover 11, and a stop member 132 is disposed on a portion of the pressure float 13 located at the inner side of the cover 11, and the stop member 132 is limited at the inner side of the cover 11. The stopper 132 is effective to prevent the pressure float 13 from being detached from the cover 11.

Specifically, as shown in fig. 2, 4, 5 and 6, in one embodiment, the stopper 132 includes an annular rib surrounding the outside of the pressure float 13, an inner circumferential surface of the annular rib being connected to the pressure float 13, and an outer diameter of the annular rib being larger than a diameter of the second mounting through-hole 111.

So that the annular rib cannot move outside the cover 11 through the second mounting through-hole 111, thereby ensuring that the pressure float 13 is not flushed out of the cover 11.

Further, in an embodiment, as shown in fig. 2, 4 and 5, the lid assembly 10 further includes a filter screen 16, the filter screen 16 is disposed on the inner side surface of the lid body 11, and the filter screen 16 shields the first mounting through hole and the air inlet of the pressure release valve 12, so as to prevent the pressure release valve 12 from being blocked by substances in the body space inside the lid body 11.

Further, in another embodiment, as shown in fig. 1, there is provided a pressure vessel 20, which includes a pot body 21 and the above-mentioned pot cover assembly 10, wherein the cover 11 is provided at the opening of the pot body 21, and the side of the cover 11 facing the inside of the pot body 21 is the inner side of the cover 11.

According to the pressure vessel 20 provided by the scheme, in the normal cooking process, the cover body 11 covers the pot body 21, and when the pressure in the pot body 21 reaches the set pressure of the pressure release valve 12, the pressure release valve 12 is opened to release the pressure. By adopting the lid assembly 10 in any of the above embodiments, if the pressure in the pot body 21 reaches the set pressure of the pressure release valve 12 and the pressure release valve 12 cannot be opened to release the pressure, along with the further increase of the pressure in the pot body 21, when the pressure in the pot body 21 is greater than the preset high pressure value, the sealing plug 14 moves to the position where the auxiliary exhaust passage 131 is communicated, so that the auxiliary exhaust passage 131 is utilized to release the pressure, the situation that the pressure in the pot body 21 is too large is avoided, and the use safety is improved.

In particular, the pressure vessel 20 may be a pressure cooker.

Further, as shown in fig. 2 to 5, in an embodiment, the pressure vessel 20 further includes an inner pot 22 and a second sealing ring 23, the inner pot 22 is placed in the pot body 21, an opening of the inner pot 22 faces an opening of the pot body 21, a first outward flange 221 is disposed at the opening of the inner pot 22, a locking groove 211 is disposed on the pot body 21 corresponding to the first outward flange 221, and the second sealing ring 23 is sleeved outside the inner pot 22 and compressed between the first outward flange 221 and a groove wall of the locking groove 211. The second sealing ring 23 is arranged to prevent gas from entering the gap between the inner pot 22 and the pot body 21.

Specifically, in some embodiments, the inner pan 22 is an iron pan.

Further, as shown in fig. 2 to 4, in one embodiment, an insulating layer 24 is disposed between the inner pot 22 and the pot body 21. A wave absorbing plate 25 is arranged between the bottom wall of the inner pot 22 and the heat insulating layer 24.

In some embodiments, the pot body 21, the inner pot 22 and the cover 11 are made of materials through which microwaves can pass. The pressure vessel 20 may be placed in a microwave oven or other heating device capable of generating microwave, and the microwave may pass through the cover 11 and the pot body 21 and enter the inner pot 22 to heat the food in the inner pot 22.

The wave absorbing plate 25 is made of wave absorbing material, and can absorb most of the microwave entering the pot body 21, and then convert the microwave into heat energy to heat the food in the inner pot 22. The arrangement of the heat-insulating layer 24 can improve the heat-insulating effect of the inner pot 22.

Further, as shown in fig. 1 and 5, in one embodiment, the pressure vessel 20 further comprises a third sealing ring 26. A second flanging 212 is arranged at the opening of the pot body 21, and when the cover body 11 covers the opening of the pot body 21, the second flanging 212 is positioned at the inner side of the cover body 11. A boss 112 is arranged at a position on the cover body 11 corresponding to the second flanging 212, the third sealing ring 26 can be pressed between the boss 112 and the second flanging 212, and a surface of the boss 112 facing the second flanging 212 is parallel to a surface of the third sealing ring 26 abutting against the boss 112. When the cover 11 covers the pot body 21, the third sealing ring 26 is in surface contact with the boss 112, so that the contact area is large and the sealing performance is high.

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 utility model 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 utility model.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.

In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meanings of the above terms in the present invention can be understood according to specific situations by those of ordinary skill in the art.

In the present invention, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may be directly contacting the second feature or the first and second features may be indirectly contacting each other through intervening media. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.

It will be understood that when an element is referred to as being "secured to" or "disposed on" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and the like as used herein are for illustrative purposes only and do not denote a unique embodiment.

The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.

The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the utility model. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.

Claims

1. A lid assembly, comprising:

the pressure relief valve is arranged in the first mounting through hole;

2. The lid assembly of claim 1, further comprising a flexible connector, wherein at least one of the lid, the relief valve, and the pressure float is connected to the flexible connector, and the flexible connector is connected to the sealing plug.

3. The lid assembly of claim 2, wherein the flexible connection is connected between the pressure float and the plug.

4. The lid assembly according to any one of claims 1 to 3, wherein the plug comprises a plug and a first sealing ring sleeved outside the plug, the plug can be inserted into the auxiliary exhaust channel, and when the plug is inserted into the auxiliary exhaust channel, the first sealing ring is compressed between the plug and the side wall of the auxiliary exhaust channel;

5. The pot lid assembly of claim 4, wherein the plug is a rubber plug;

and/or when the plug is inserted into the auxiliary exhaust channel, one end face of the plug, facing the inner side of the cover body, is a front end face, a transition guide face is formed at the intersection of the front end face and the outer peripheral face of the plug, and the diameter of a space surrounded by the transition guide face is gradually reduced in the direction close to the front end face.

6. The lid assembly according to any one of claims 1 to 3, wherein one end of the pressure float is inserted into the inner side of the lid body, and a portion of the pressure float located inside the lid body is provided with a stopper which is stopped at the inner side of the lid body.

7. The lid assembly according to claim 6, wherein the stopper comprises an annular rib surrounding the pressure float, an inner circumferential surface of the annular rib being connected to the pressure float, and an outer diameter of the annular rib being larger than a diameter of the second mounting through-hole.

8. A pressure vessel, which is characterized by comprising a pot body and a pot cover assembly as claimed in any one of claims 1 to 7, wherein the cover body is arranged at the opening of the pot body in an openable and closable manner, and one side of the cover body facing the inside of the pot body is the inner side of the cover body.

9. The pressure vessel of claim 8, further comprising an inner pan and a second sealing ring, wherein the inner pan is placed in the pan body, the opening of the inner pan faces the opening of the pan body, a first outward-turning edge is arranged at the opening of the inner pan, a clamping groove is arranged on the pan body corresponding to the first outward-turning edge, the second sealing ring is sleeved outside the inner pan and tightly pressed between the first outward-turning edge and the groove wall of the clamping groove, a heat-insulating layer is arranged between the inner pan and the pan body, and a wave-absorbing plate is arranged between the bottom wall of the inner pan and the heat-insulating layer.

10. The pressure vessel according to claim 8 or 9, further comprising a third seal ring, wherein a second flanging is arranged at the opening of the pot body, the second flanging is located on the inner side of the cover body when the cover body covers the opening of the pot body, a boss is arranged on the cover body at a position corresponding to the second flanging, the third seal ring can be pressed between the boss and the second flanging, and the surface of the boss facing the second flanging is parallel to the surface of the third seal ring abutted against the boss.