CN217959712U - Cooking utensil and inner container thereof - Google Patents

Abstract

The utility model provides a cooking utensil's inner bag, including diapire, lateral wall and oral area turn-ups, inner bag from interior to exterior includes two-layer or more than two-layer metal level at least, wherein forms fluid passage between two metal levels, is equipped with heat-conducting liquid in the fluid passage, fluid passage includes the net passageway, assembles the passageway to many that courage mouth portion direction extends from the net passageway, the net passageway covers the lower part of lateral wall at least, the end that assembles the passageway is located the turn-ups's of oral area below. The utility model discloses a convenience of customers's use when the inner bag can realize even heating. The utility model also provides a cooking utensil with above-mentioned inner bag.

Description

Cooking utensil and inner container thereof

[ technical field ] A method for producing a semiconductor device

The utility model relates to a kitchen appliance technical field especially relates to a cooking utensil and inner bag thereof.

[ background ] A method for producing a semiconductor device

In a cooking appliance in the prior art, such as an electric rice cooker or an electric pressure cooker, an inner container of the cooking appliance is generally made of a metal material, and a heating disc or an IH wire coil is used for heating, the heating disc or the IH wire coil is arranged at the bottom of the electric rice cooker, and the heating disc or the IH wire coil is electrified to transfer heat to the inner container, so that food materials in the inner container are cooked.

The existing inner container has the main problems that the food is heated unevenly, the bottom temperature is possibly too high, the side temperature is insufficient, the food is heated unevenly, the bottom is pasted, and the upper part is half-cooked.

In order to solve the problem of uneven heating, a soaking inner container appears in the prior art, the inner container is provided with a hollow interlayer, heat conduction liquid is arranged in the interlayer, and the heat conduction liquid can be rapidly filled in other areas of the inner container when the inner container is heated. However, the manufacturing process of the sandwich type inner container is complex, the size consistency of the product is difficult to control, and the sandwich type inner container is easy to deform after long-term use. Because the inner bag all can be heated the temperature and become high in the use, and hollow intermediate layer leads to the inner bag intensity to weaken to some extent, may have certain potential safety hazard in addition.

In order to solve the strength and safety problems of a hollow sandwich type liner, the prior art provides the liner with a heat transfer vessel, the heat transfer vessel is formed by injecting a blowing medium along a preset forming path and blowing, and the vessel distribution of the liner is too close to the mouth flanging, so that the mouth flanging temperature is too high, the use of a user is influenced, and the improvement is needed.

[ Utility model ] content

The utility model aims to solve the technical problem that the inner container of the cooking utensil overcomes the defects of the prior art, and can realize the use of uniform heating and convenience for users.

In order to solve the technical problem, the utility model adopts the following technical scheme:

the inner container of the cooking utensil comprises a bottom wall, a side wall and a mouth portion flanging, the inner container at least comprises two or more than two metal layers from inside to outside, a fluid channel is formed between the two metal layers, heat conducting liquid is arranged in the fluid channel, the fluid channel comprises a grid channel and a plurality of gathering channels extending from the grid channel to the mouth portion direction of the container, the grid channel at least covers the lower portion of the side wall, and the tail ends of the gathering channels are located below the mouth portion flanging.

In an embodiment of the present invention, the fluid passage protrudes toward the outer surface of the inner container.

In an embodiment of the present invention, in the process of extending the convergence channel upwards, the protrusion height is gradually reduced.

In an embodiment of the invention, the fluid channel further comprises a process channel, the fluid channel is formed by filling the process channel with a gas or a liquid.

In an embodiment of the present invention, a height difference between the end of the gathering channel and the flange of the mouth portion is greater than 20 mm.

The utility model discloses an in the embodiment, the inner surface of inner bag is equipped with vertical recess, vertical recess corresponds assemble the passageway.

In an embodiment of the present invention, the gathering channel is circumferentially and uniformly distributed along the inner container sidewall.

In an embodiment of the present invention, the inner container at least includes a first metal layer, a second metal layer and a third metal layer from inside to outside, and the fluid channel is formed between the second metal layer and the third metal layer.

In an embodiment of the invention, the thickness of the second metal layer is greater than the thickness of the third metal layer.

In an embodiment of the present invention, the first metal layer is made of stainless steel.

The utility model also provides a cooking utensil, including the pot body and inner bag, the inner bag is foretell cooking utensil's inner bag.

The utility model discloses following beneficial effect has:

the utility model discloses an inner bag wherein forms fluid passage between two metal levels, is equipped with heat conduction liquid in the fluid passage, fluid passage includes the net passageway, from the net passageway to the passageway that assembles that the courage mouth portion direction extends, the net passageway covers the lower part of lateral wall at least, the end that assembles the passageway is located the turn-ups below of oral area. Through the heat conduction liquid in the fluid passage can realize quick heat conduction, and fluid passage has included the net passageway and has assembled the passageway, the net passageway can realize the large tracts of land heat transfer of inner bag, assemble the condensation and the backward flow that the passageway can realize heat conduction liquid, the existence that assembles the passageway makes net passageway and inner bag oral area turn-ups have certain distance, reduced the heat to the turn-ups transmission of oral area, convenience of customers gets the oral area turn-ups and also can not scald too. And many existence that assemble the passageway can compromise the heat transfer of inner bag top again, ensure the thermally equivalent of inner bag lateral wall, become the passageway that assembles by the net passageway in the region of inner bag lateral wall top, the heat transfer of inner bag top has been taken into account when having reduced the heat transfer of oral area turn-ups, and when concrete application, heat-conducting liquid heats the in-process that gasifies the fluid passage who fills the inner bag rapidly at below heating device, one end upwards assembles the passageway that assembles, it has prevented the continuation of gasified heat-conducting liquid to assemble the passageway and has removed, also give the inner bag body with the temperature transmission in gasified time, the heat-conducting liquid that assembles in the passageway can liquefy the condensation after assembling sufficient heat-conducting liquid, and it upwards extends to assemble the passageway, can flow back after the condensation, so circulation is reciprocal. The existence of the gathering channel enables the heat-conducting liquid to have a fixed gathering position after being gasified, and condensation and backflow are achieved.

The fluid channel further includes a process channel formed by filling the process channel with a gas or a liquid. The process channels may be filled with gas or liquid to cause the fluid channels to bulge, forming grid channels and converging channels. That is to say, the process channel is provided with a process inlet, the converging channel is formed by inflating gas or liquid and is not provided with the process inlet, and the position of the process inlet can be ensured to be fixed through the specific process channel, so that the corresponding process treatment is convenient to carry out.

The inner surface of the inner container is provided with a vertical groove, and the vertical groove corresponds to the gathering channel. Vertical recess can increase the heat transfer area of inner bag internal surface, and assembles passageway department and be provided with heat-conducting liquid, is the region that heat conduction effect is best, can promote to give the edible material in the inner bag with the heat transfer of inner bag, realizes high-efficient quick heating.

And in the process that the converging channel extends upwards, the protruding height is gradually reduced. The in-process that the passageway progressively extends assembles gradually with inner bag surface parallel and level, reduces the inner bag gradually and to the heat transmission of top for the inner bag surface does not have obvious height segment difference, also conveniently cleans the washing to the inner bag surface.

The height difference between the tail end of the convergence channel and the mouth flanging is larger than 20 mm. By the design, the heat transmitted to the mouth flanging by the gathering channel can be reduced. When the mouth flanging device is used in normal cooking, the food materials in the inner container cannot be fully placed at the mouth flanging, so that the mouth flanging does not need to transfer heat relative to the lower part, and the user can be influenced to take the food materials out of the mouth flanging for use if excessive heat is transferred to the mouth flanging. And the terminal of gathering the passageway is greater than 20 millimeters and the turn-ups of oral area altitude difference gets the use and influences for a short time to the inner bag end, also can transmit the heat to the inner bag top, realizes the heating of a large amount of edible materials in the inner bag.

The gathering channels are uniformly distributed along the circumferential direction of the side wall of the inner container. The heat transfer and condensation effects can be uniformly distributed, and the uniform heating and condensation of the inner container are realized.

These features and advantages of the present invention will be disclosed in more detail in the following detailed description and the accompanying drawings.

[ description of the drawings ]

The invention is further described with reference to the accompanying drawings:

FIG. 1 is a sectional view of an inner container according to an embodiment of the present invention;

FIG. 2 is an enlarged view of a portion A of FIG. 1;

fig. 3 is a schematic view of an inner container according to a first embodiment of the present invention;

fig. 4 is a schematic view of an inner container in the first embodiment of the present invention.

Reference numerals are as follows:

the metal structure comprises an inner container 100, a first metal layer 1, a second metal layer 2, a third metal layer 3, a fourth metal layer 4, a fluid channel 5, a grid channel 51, a converging channel 52, a process channel 53, a process inlet 54, a vertical groove 6 and an opening flanging 7.

[ detailed description ] embodiments

The utility model provides a cooking utensil's inner bag, including diapire, lateral wall and oral area turn-ups, inner bag from interior to exterior includes two-layer or two-layer more than metal level at least, wherein forms fluid passage between two metal levels, is equipped with heat conduction liquid in the fluid passage, fluid passage includes the net passageway, assembles the passageway to many that courage mouth portion direction extends from the net passageway, the net passageway covers the lower part of lateral wall at least, the end that assembles the passageway is located the turn-ups's of oral area below. The utility model discloses a convenience of customers's use when the inner bag can realize even heating. The utility model also provides a cooking utensil with above-mentioned inner bag.

The technical solutions of the embodiments of the present invention are explained and explained below with reference to the drawings of the embodiments of the present invention, but the embodiments described below are only preferred embodiments of the present invention, and not all embodiments. Based on the embodiments in the embodiment, those skilled in the art can obtain other embodiments without making creative efforts, which all belong to the protection scope of the present invention.

Example one

Referring to fig. 1 to 4, in this embodiment, an inner container 100 of a cooking appliance is provided, which includes a bottom wall and a side wall, and the inner container at least includes a first metal layer 1, a second metal layer 2, a third metal layer 3, and a fourth metal layer 4 from inside to outside, a fluid channel 5 is formed between the second metal layer 2 and the third metal layer 3, a heat conducting liquid is provided in the fluid channel 5, and the fourth metal layer 4 or the first metal layer 1 is a magnetic conducting layer. Form fluid passage 5 between second metal level 2 and the third metal level 3, set up heat-conducting liquid in fluid passage 5, when the inner bag is heated, heat-conducting liquid can expand other regions of inner bag rapidly, realizes the quick heat conduction of inner bag, and the preferred, second metal level 2 and third metal level 3 are the same material for associativity between them is good, can not lead to the separation of second metal level and third metal level when heat-conducting liquid is heated. For the fluid channel, the first metal layer 1 is arranged in the fluid channel, the fourth metal layer 4 is arranged outside the fluid channel, the second metal layer 2 and the third metal layer 3 in the middle can be strengthened and protected, and the electromagnetic heating of the inner container can be realized by arranging the magnetic conduction layer on the fourth metal layer or the first metal layer. Of course, the fourth metal layer may be present or absent, and the first metal layer may be present or absent. For example, only the second metal layer 2 and the third metal layer 3, only the first metal layer 1, the second metal layer 2 and the third metal layer 3, or only the second metal layer 2, the third metal layer 3 and the fourth metal layer 4 may be provided, so that the fluid channel can be formed, the heat-conducting liquid can be provided, and the rapid heat conduction of the liner can be realized.

The heat conducting liquid may be a refrigerant, such as freon, or other heat superconducting liquid. Such as superconducting fluids used in radiators. The principle of the heat conduction liquid for quick heat conduction is similar to that of a thermosiphon, a heat pipe and the like. When being heated, the heat-conducting liquid can be rapidly vaporized and rapidly diffused to other areas of the fluid channel 5, and simultaneously, the heat is rapidly transferred to other areas of the inner container, so that the inner container is uniformly heated. During specific manufacturing, the heat-conducting liquid is filled into the fluid channel 5 after a certain vacuum environment is formed in the fluid channel.

Specifically, the second metal layer 2 and the third metal layer 3 are made of the same material, so that the second metal layer 2 and the third metal layer 3 can be better and tightly combined together. Preferably, the second metal layer 2 and the third metal layer 3 are aluminum. The heat conduction effect of aluminium is better, and is provided with heat-conducting liquid between the two for the heat can transmit other regions of inner bag fast, realizes the quick heat transfer of inner bag.

In this embodiment, referring to fig. 1 and 2, the fluid passage 5 protrudes toward the outer surface of the inner bladder. On the one hand, the heating area of the inner container is increased, the use of a user on the inner surface of the inner container is not influenced, and the inner surface of the inner container is convenient to clean. When the fluid channel is manufactured, the fluid channel can be convex towards the inner surface or the outer surface, in the embodiment, the fluid channel is convex towards the outer surface, and the inner surface is basically smooth, so that the food in the inner container can be conveniently contained and cleaned.

In this embodiment, the thickness of the second metal layer 2 is greater than the thickness of the third metal layer 3. Because be equipped with fluid passage between second metal level 2 and the third metal level 3, at the in-process that forms fluid passage, because outer thickness is littleer, can ensure that the third metal level outwards takes place the deformation, ensures that final fashioned inner bag fluid passage is to inner bag surface protrusion, rather than to inner bag internal surface protrusion and influence user's use.

In this embodiment, first metal level 4 is stainless steel, and first metal level 4 is the innermost of inner bag, that is to say the internal surface of inner bag is the stainless steel, and its inner surface can not set up and be stained with the coating not, has improved the life of inner bag 3 greatly, because the internal surface does not be stained with the coating, does not worry the problem that the coating drops, can use steel wire ball washing inner bag internal surface when wasing. Of course, the first metal layer may be made of other materials capable of realizing magnetic permeability, such as iron.

In this embodiment, the first metal layer 1, the second metal layer 2 and the third metal layer 3 form a composite plate, and then are stretched to form a liner shape of the inner container. Optionally, the first metal layer, the second metal layer and the third metal layer are respectively stainless steel, aluminum and aluminum, and the first metal layer, the second metal layer and the third metal layer are combined together and then stretched to form a liner shape of the inner container. The concrete manufacturing process comprises the steps of compounding aluminum and aluminum to form a composite aluminum material, compounding stainless steel and the composite aluminum material, and stretching to form the liner shape of the inner container.

In this embodiment, fourth metal level 4 is the magnetic conduction layer that the meltallizing formed for the inner bag can realize electromagnetic heating, and because it is located the inner bag surface, it is closer apart from the electromagnetic wire coil moreover, has reduced the shielding of other metal levels probably to magnetic field, in order to realize good electromagnetic heating effect. Because a fluid channel is formed between the second metal layer 2 and the third metal layer 3, in order to ensure that the fluid channel protrudes outward and avoid the influence of the fourth metal layer 4 on the process of the protruding fluid channel, in this embodiment, the fluid channel is formed by protruding outward and then the magnetic conductive layer is fused.

In the present embodiment, referring to fig. 3 and 4, the fluid channel 5 includes a grid channel 51 and a converging channel 52 located above the grid channel, and the converging channel 52 is communicated with the grid channel 51. The grid channels 51 refer to the fluid channels 5 distributed on the liner like grids, the grids can be triangular, quadrangular, pentagonal, hexagonal, heptagonal, octagonal and the like, the hexagonal grids are shown in the drawing of the embodiment, the hexagonal grids protrude outwards on six sides of the hexagon to form the fluid channels 5, the heat-conducting liquid is positioned in the fluid channels, namely, the second metal layer 2 and the third metal layer 3 are separated to form hollow fluid channels, the area in the middle of the hexagon is flat (namely, does not protrude outwards), namely, the second metal layer 2 and the third metal layer 3 are combined, and the two are combined together by hot pressing, so that the structure can effectively ensure the overall strength of the liner. In this embodiment, the converging channel 52 is further disposed above the grid channel 51, and the heat-conducting liquid in the fluid channel 5 flows upward after being heated and gasified, and finally converges on the converging channel to be condensed and reflowed to the lower side, so as to finally enlarge the heat transfer area of the heat-conducting liquid in the inner container. The existence of the passageway of assembling can compromise the heat transfer of inner bag top again, ensure the thermally equivalent of inner bag lateral wall, the region of inner bag lateral wall top has become the passageway of assembling by the net passageway, the heat transfer of inner bag top has been taken into account when having reduced oral area turn-ups heat transfer, and when concrete application, the in-process of the fluid passage of inner bag is filled rapidly in the heat conduction liquid heating gasification in below heating device, one end upwards assembles the passageway of assembling, assemble the passageway and prevented the continuation removal of gasified heat conduction liquid, also with the temperature transfer for the inner bag body in gasification, the heat conduction liquid that assembles in the passageway can the liquefaction condensation after assembling sufficient heat conduction liquid, and it upwards extends to assemble the passageway, can flow back after the condensation, so circulation is reciprocal. The existence of net passageway 51, can improve the intensity that the packing has the heat conduction liquid formula inner bag, the net of crisscross setting can realize the large tracts of land distribution of heat conduction liquid, to the inner bag, the bottom is heating device, heating device can transfer heat to other regions of inner bag after the heating inner bag, because the inner bag is used for placing edible material and cooks, and the region that is close to the oral area does not have inner bag below and bottom requirement height to the heating requirement, so set up on inner bag upper portion in this embodiment and assemble the passageway, the heat transfer effect and the application convenience of inner bag have been compromise. Among the prior art, the net passageway perhaps only distributes in the inner bag below, it is poor to lead to the heat transfer effect on inner bag upper portion like this, perhaps distribute inner bag upper portion, lead to oral area turn-ups high temperature again like this, influence the convenience of using, and because all be the net passageway on the inner bag lateral wall, the heat-conducting liquid can not form the effect of assembling, can not realize the purpose of condensation, but in this embodiment, set up in the top of inner bag net passageway and assemble the passageway, can enough compromise the heat transfer on inner bag upper portion, and can not lead to the high temperature, and have the effect of assembling and condensation.

In this embodiment, referring to fig. 3 and 4, the grid channel 51 covers at least the lower part of the side wall, and the end of the converging channel 52 is located below the mouth cuff 7. On the one hand, assemble passageway 52 and upwards extend, enlarge the heated area of inner bag, on the other hand, assemble passageway 52's end and be located the turn-ups's of oral area below, avoid too much heat transfer to oral area turn-ups on, cause the inner bag high temperature, influence the user and get and use the inner bag. Specifically, the height difference between the tail end of the converging channel 52 and the mouth flanging is larger than 20 mm, so that the heat transmitted from the converging channel 52 to the mouth flanging is reduced. When the cooker is normally cooked and used, food materials in the inner container cannot be fully placed at the mouth flanging 7, so that the mouth flanging 7 does not need to conduct heat relatively to the lower part, and the user can be influenced to take the food materials for use if excessive heat is transferred to the mouth flanging. The applicant determines that the height difference between the tail end of the gathering channel 52 and the mouth flanging is larger than 20 mm, and the use influence on the inner container end is small by combining the product use condition and the experimental test. Specifically, the tail end of the converging channel is higher than the maximum scale line of the liner, the height difference between the tail end of the converging channel and the flanging of the opening is larger than 20 mm, and for the liner with the conventional size (such as 4L or 5L), the height difference between the tail end of the converging channel 52 and the flanging of the opening is 20-30 mm, so that the heat transfer effect and the application convenience of the liner can be considered.

Preferably, the converging channels 52 are uniformly distributed along the circumferential direction of the sidewall of the liner. The heat transfer and condensation effects can be uniformly distributed, and the uniform heating and condensation of the inner container are realized.

Preferably, in the embodiment, the protruding height gradually decreases as the converging channel 52 extends upward. The converging channel 52 is gradually aligned with the outer surface of the inner container in the process of gradually extending, so that the heat transmission from the inner container to the upper part is gradually reduced, the outer surface of the inner container has no obvious height difference, and the outer surface of the inner container is also conveniently cleaned.

Referring to fig. 1 and 2, the inner surface of the liner is provided with vertical grooves 6, and the vertical grooves 6 correspond to the converging channels 52. Vertical recess 6 can increase the heat transfer area of inner bag internal surface, and assembles passageway 52 department and be provided with heat-conducting liquid, is the region that heat conduction effect is best, can promote the edible material in the heat transfer inner bag with the inner bag, realizes high-efficient quick heating.

Referring to fig. 3 and 4, in the present embodiment, the fluid channel 5 further includes a process channel 53, and the fluid channel is formed by filling a gas or a liquid into the process channel 53. The process channel 53 is used as a part of the fluid channel, one end of the process channel extends downwards to be connected with the fluid channel, the other end of the process channel extends upwards to the turning edge of the opening part of the inner container to be used as a process inlet 54, the process inlet 54 can be filled with gas or liquid to enable the third metal layer 3 to deform outwards to form a hollow fluid channel 5, and the process inlet can be used for injecting heat-conducting liquid after being vacuumized. Because the process inlet is positioned on the edge of the opening, the process treatment such as gas or liquid filling, vacuum pumping or heat conducting liquid injection and the like can be conveniently carried out, after the corresponding process treatment is carried out, the process inlet can be cut off, and the process channel 53 is sealed by welding or crimping and the like.

The manufacturing process of the liner of the embodiment is as follows:

1. and cutting the sheet materials of the first metal layer, the second metal layer and the third metal layer which are formed into specific shapes, wherein the sheet materials of the embodiment comprise three layers, namely a stainless steel sheet material, an aluminum sheet material and an aluminum sheet material from inside to outside. The sheet is cut in preparation for subsequent lamination and stretching.

2. And arranging a temperature-resistant isolation layer, such as temperature-resistant graphite, between the second metal layer and the third metal layer, wherein the temperature-resistant isolation layer is in a preset fluid channel shape. The preset fluid channel shape can be designed and printed on the corresponding metal layer, so that the grid channel pattern of the final finished product is realized. Because the temperature-resistant isolation layer is arranged between the two metal layers, when the two metal layers are compounded in a hot pressing mode, the preset fluid channel is provided with the temperature-resistant isolation layer in the shape, so that the metal layers cannot be compounded together, and after gas or liquid is filled between the metal layers and the fluid channel, the area without compounding together can be expanded.

3. And hot-pressing and compounding the second metal layer and the third metal layer together to form a first composite board, and then compounding the first composite board and the first metal layer together to form a second composite board.

4. And stretching the second composite board to form a liner shape of the liner. The drawing can refer to the conventional process, and the main process is to put the plate on a corresponding die and draw the plate by punching.

5. And separating a process inlet at the temperature-resistant isolation layer. The process inlet may be formed by prying one of the metal layers open, or by punching.

6. And filling gas or liquid into the process inlet to enable the third metal layer to expand outwards at the temperature-resistant isolation layer to form a fluid channel with a part of the third metal layer protruding outwards. In order to ensure that the third metal layer expands outwards and the second metal layer does not expand inwards when gas or liquid is filled, on one hand, the thickness of the second metal layer 2 is designed to be larger than that of the third metal layer 3, the strength of the third metal layer 3 is weaker, so that the third metal layer is easier to deform, and on the other hand, the mold is provided with a corresponding avoiding space, so that the third metal layer can expand outwards to deform.

7. And vacuumizing the process inlet and injecting heat-conducting liquid. After the vacuum pumping, a negative pressure environment is formed in the fluid channel, and the heat conducting liquid can be easily sucked. And the fluid channel is internally provided with a vacuum environment, so that the heat conducting liquid is convenient to gasify when being heated.

8. The process inlet is closed. Specifically, a primary seal is formed by crimping and then welding the seal. The process inlet is closed to avoid leakage of the heat transfer fluid when heated.

9. The fourth metal layer is formed by meltallizing. The fourth metal layer outside the third metal layer is formed by melting and jetting after the third metal layer expands outwards, and the design can avoid the interference of the fourth metal layer outside to the outward expansion of the third metal layer. That is, the third metal layer belongs to the outermost layer of the inner container when expanding outwards, so the fourth metal layer can be formed by injection after expansion deformation without being bound to expand outwards, and magnetic conduction heating or wear resistance, rust prevention and other effects can be realized through different materials.

10. The surface treatment of the liner, such as spraying of colored paint, such as organic silicon, improves the aesthetic property, wear resistance and antirust property of the liner.

The inner bag of this embodiment, through setting up fluid passage, be equipped with heat-conducting liquid in the fluid passage, when the inner bag is heated, other regions that heat-conducting liquid can expand the inner bag rapidly realize the quick heat conduction of inner bag, and second metal level and third metal level are the same material for associativity between them is good, can not lead to second metal level and third metal level separation when heat-conducting liquid is heated. The inner container is also internally provided with a first metal layer, the outer container is provided with a fourth metal layer, the middle second metal layer and the middle third metal layer can be strengthened and protected, and the electromagnetic heating of the inner container can be realized by arranging the magnetic conduction layer on the fourth metal layer or the first metal layer.

Of course, in other embodiments, the fourth metal layer may or may not be present and the first metal layer may or may not be present. And a protective layer, a wear-resistant layer, an anti-rust layer and other materials can be arranged in the first metal layer or outside the fourth metal layer.

The utility model also provides a cooking utensil, can be electric rice cooker or electric pressure cooker etc. including the pot body, the internal inner bag that has above-mentioned embodiment of pot. It can be understood that the cooking utensil further comprises a pot cover, a heating device is arranged in the pot body, the heating device can heat the inner container, and food materials to be cooked can be placed in the inner container.

The above description is only for the specific embodiments of the present invention, but the protection scope of the present invention is not limited thereto, and those skilled in the art should understand that the present invention includes but is not limited to the contents described in the drawings and the above detailed description. Any modification which does not depart from the functional and structural principles of the present invention is intended to be included within the scope of the claims.

Claims (10)

1. The inner container of the cooking utensil comprises a bottom wall, a side wall and an opening flanging, and at least comprises two or more than two metal layers from inside to outside, wherein a fluid passage is formed between the two metal layers, and heat-conducting liquid is arranged in the fluid passage.

2. The liner of a cooking appliance according to claim 1, wherein said fluid passageway projects toward an outer surface of the liner.

3. The liner of claim 2, wherein the height of the protrusion is gradually reduced as the converging channel extends upward.

4. The liner of a cooking appliance according to claim 1, wherein the fluid channel further comprises a process channel formed by filling the process channel with a gas or a liquid.

5. The liner of a cooking appliance according to claim 1, wherein the difference in height between the end of the converging channel and the mouth flange is greater than 20 mm.

6. The liner of the cooking appliance according to claim 1, wherein the inner surface of the liner is provided with vertical grooves corresponding to the converging channel.

7. The liner of claim 1, wherein the converging channels are evenly distributed circumferentially along the sidewall of the liner.

8. The liner of the cooking appliance of claim 1, wherein the liner comprises at least a first metal layer, a second metal layer and a third metal layer from inside to outside, and the fluid channel is formed between the second metal layer and the third metal layer.

9. The liner of claim 8, wherein the first metal layer is stainless steel.

10. A cooking appliance comprising a pot body and a liner, wherein the liner is the liner of the cooking appliance according to any one of claims 1 to 9.

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