CN211961711U - Composite bottom pot - Google Patents

Abstract

The utility model discloses a pot with composite bottom relates to the cooking utensil field, pot with composite bottom include pot diapire and fixed connection in the compound film in bottom of pot diapire bottom, the pot diapire with be provided with the thermal-insulated structure of hole groove between the compound film in bottom. An intermediate connecting layer is arranged between the bottom wall of the pot and the bottom composite bottom sheet, and the hole-groove heat insulation structure is formed into a plurality of heat insulation cavities which are arranged in the intermediate connecting layer and are distributed at intervals along the transverse direction. The utility model discloses a pot with composite bottom can improve the temperature distribution at the bottom of the pot, can reduce the oil smoke and avoid the emergence of local burnt paste in culinary art process, improves user's culinary art greatly and experiences.

Description

Composite bottom pot

Technical Field

The utility model relates to a cooking utensil field specifically, relates to a composite bottom pan.

Background

Cookware on the market is mainly single-layer material cookware, composite material cookware or cookware with a single-layer material combined composite bottom, when the cookware is heated on a heat source, the temperature of a region, close to the heat source, of the bottom of the cookware is higher, and the temperature of a region, far away from the heat source, of the bottom of the cookware is lower. Because the temperature distribution of pan bottom is very inhomogeneous, the regional temperature that the pan bottom is close to the heat source can rise rapidly and exceed the smoke point of edible oil, when the user cooks the operation, for example for cooking, can produce a large amount of oil fumes when adding edible oil in the pot, makes the edible material produce local burnt paste easily even in culinary art process to influence user's healthy and bring bad culinary art and experience.

Disclosure of Invention

The utility model aims at providing a novel composite bottom pan, this composite bottom pan can improve the temperature distribution at the bottom of the pot, can reduce the oil smoke and avoid the emergence of local burnt paste in culinary art in-process, improves user's culinary art greatly and experiences.

In order to achieve the above object, the utility model provides a composite bottom pan, composite bottom pan include pot diapire and fixed connection in the compound film in bottom of pot diapire bottom, the pot diapire with be provided with the thermal-insulated structure of hole groove between the compound film in bottom.

Optionally, an intermediate connection layer is arranged between the bottom wall of the pot and the bottom composite bottom sheet, and the hole-groove heat insulation structure is formed into a plurality of heat insulation cavities which are arranged in the intermediate connection layer and distributed at intervals along the transverse direction.

In some embodiments, the hole-slot insulation structure is formed as a through insulation hole through the bottom surface of the pan bottom wall and the top surface of the bottom cover sheet.

Optionally, the intermediate connection layer may include an upper connection layer, a lower connection layer, and a heat conducting element sandwiched between the upper connection layer and the lower connection layer, wherein,

a plurality of upper connecting layer heat insulation holes which are distributed at intervals along the transverse direction are arranged on the upper connecting layer; and/or a plurality of lower connecting layer heat insulation holes distributed at intervals along the transverse direction are arranged on the lower connecting layer;

the hole groove heat insulation structure comprises the upper connecting layer heat insulation hole and/or the lower connecting layer heat insulation hole.

Furthermore, the hole-groove heat insulation structure can also comprise a plurality of heat conduction element heat insulation holes which penetrate through the heat conduction elements along the thickness direction and are distributed at intervals transversely, and the upper connecting layer heat insulation holes, the heat conduction element heat insulation holes and the lower connecting layer heat insulation holes are aligned one by one and are communicated axially;

and/or the hole-groove heat insulation structure further comprises a plurality of heat conduction element heat insulation grooves which are concavely formed on lateral heat conduction surfaces of the heat conduction elements, and the upper connecting layer heat insulation holes and/or the lower connecting layer heat insulation holes are aligned with the heat conduction element heat insulation grooves one by one and are axially communicated with the heat conduction element heat insulation grooves.

Furthermore, the heat-conducting element heat-insulating hole can be a round hole, and the diameter of the heat-conducting element heat-insulating hole is more than or equal to 2 mm; or the cross section of the heat-conducting element heat-insulating groove is circular, the diameter of the heat-conducting element heat-insulating groove is larger than or equal to 2mm, and the depth of the heat-conducting element heat-insulating groove is larger than or equal to 1 mm.

In some embodiments, the hole and groove heat insulating structure further includes a plurality of heat conducting element heat insulating holes penetrating the heat conducting element in a thickness direction and laterally spaced apart, and/or the hole and groove heat insulating structure further includes a plurality of heat conducting element heat insulating grooves concavely formed on lateral heat conducting surfaces of the heat conducting element, and the upper connection layer and/or the lower connection layer may be partially formed in the heat conducting element heat insulating holes and/or the heat conducting element heat insulating grooves.

Optionally, the bottom composite bottom sheet includes a plurality of bottom composite bottom sheets stacked in the thickness direction of the bottom wall of the pot, the intermediate connection layer is disposed between any two adjacent bottom composite bottom sheets, and at least one of the intermediate connection layers is provided with the hole-groove heat insulation structure.

Optionally, the transverse density of the hole-groove heat insulation structure of the middle connection layer may decrease in a direction that the bottom reciprocating bottom sheet vertically faces upward to the bottom wall of the pan.

Optionally, the hole and groove heat insulation structures are distributed at intervals in the middle connecting layer along the transverse direction, and any two of the hole and groove heat insulation structures are not on the same vertical line.

In some embodiments, the intermediate connection layer may be a single layer braze layer and the braze layer is formed of a copper braze;

and/or the bottom double-bottom plate is made of one of a cold-rolled steel plate material with magnetic permeability and a ferromagnetic stainless steel material;

and/or, the pot diapire is one of individual layer's not magnet steel material, aluminum alloy material and cold-rolled steel sheet material, perhaps, the pot diapire is the multilayer composite sheet including stratum basale and heat-conducting layer, the stratum basale is cold-rolled steel sheet material and/or stainless steel material, the heat-conducting layer is copper material and/or aluminium material.

Further, the matching structure between the two bottom composite bottom sheets can comprise a first matching interval capable of being completely filled with brazing materials and a second matching interval incapable of being completely filled with brazing materials, the second matching interval is larger than the first matching interval, and the hole and groove heat insulation structure comprises the matching structure formed at the second matching interval.

Furthermore, the first matching space is less than or equal to 0.2mm, and the second matching space is greater than 0.2 mm.

Optionally, the structure between the two bottom composite bottom sheets comprises a first welding layer structure provided with a brazing layer and a second gap structure without a brazing layer, and the hole-groove heat insulation structure comprises the second gap structure.

In some embodiments, the hole-groove heat insulation structure may be distributed between the pan bottom wall and the bottom composite sheet in one of a plurality of ring shapes, a plurality of fan shapes, regular dots and irregular dots along the transverse direction.

Optionally, the intermediate connection layer is a brazing layer; or the middle connecting layer comprises an upper connecting layer, a lower connecting layer and a heat conducting element or the bottom composite bottom plate clamped between the upper connecting layer and the lower connecting layer, and the upper connecting layer and the lower connecting layer are brazing layers.

Further, the middle connecting layer comprises a single structural layer or a plurality of structural layers, and the total cross-sectional area of the hole-groove heat insulation structure is less than 50% of the cross-sectional area of the structural layer on the cross section of any one structural layer.

Furthermore, the bottom heated area of the composite bottom pot at least comprises a first heated area and a second heated area with the heating temperature higher than that of the first heated area, and the distribution density of the hole-groove heat insulation structure in the second heated area is greater than that of the hole-groove heat insulation structure in the first heated area.

Optionally, the bottom composite bottom sheet includes a plurality of layers arranged in a stacked manner along the thickness direction of the bottom wall of the pot, any two adjacent bottom composite bottom sheets are provided with the intermediate connection layer therebetween, at least one of the intermediate connection layers is provided with the hole-groove heat insulation structure, and the heat conduction element is one of a copper material and an aluminum material.

Optionally, the bottom is compound the film and is included along a plurality of the range upon range of arrangement of thickness direction of pot diapire, arbitrary adjacent two all be equipped with between the compound film of bottom the intermediate junction layer, it is a plurality of at least one in the intermediate junction layer is equipped with the heat-insulating structure of hole groove, the pot diapire heat-conducting element with in the compound film of bottom arbitrary adjacent between the two cooperation structure include can be by the first cooperation interval of brazing material complete filling and can not be by the second cooperation interval of brazing material complete filling, second cooperation interval is greater than first cooperation interval, hole groove heat-insulating structure is including forming second cooperation interval the cooperation structure.

Optionally, the bottom composite bottom sheet includes a plurality of bottom composite bottom sheets stacked in the thickness direction of the bottom wall of the pot, any two adjacent bottom composite bottom sheets are provided with the intermediate connection layer therebetween, at least one of the intermediate connection layers is provided with the hole-groove heat insulation structure, any two adjacent bottom walls of the pot, the heat conduction element and the bottom composite bottom sheets include a first welding layer structure provided with a brazing layer and a second gap structure without a brazing layer, and the hole-groove heat insulation structure includes the second gap structure.

The utility model discloses a composite bottom pan sets up hole groove heat-proof structure between the compound film of pot bottom wall and bottom, this hole groove heat-proof structure forms the hole groove disappearance structure in the solid body structure between the compound film 2 of pot bottom wall 1 and bottom, thereby form local discontinuous hollow structure in the solid body structure between the compound film 2 of pot bottom wall 1 and bottom, the position that is provided with this hole groove heat-proof structure between the compound film 2 of pot bottom wall 1 and bottom can form and the different thermal resistance of solid body structure between the compound film 2 of pot bottom wall 1 and bottom, and then can change the heat conductivity and the heat transfer rate that form the position of hole groove heat-proof structure in the composite bottom pan 100, improve the temperature distribution of pot bottom, avoid the local area of pot bottom to be heated too big and lead to eating the material burnt paste and produce great oil smoke. In addition, the composite bottom pot is provided with a hole groove heat insulation structure, so that the use amount of materials can be saved, the production cost is reduced, the weight of the composite pot is lightened, and the cooking experience of a user is greatly improved.

Other features and advantages of the present invention will be described in detail in the detailed description which follows.

Drawings

The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the principles of the invention and not to limit the invention. In the drawings:

fig. 1 shows a composite bottom cookware according to a first embodiment of the present invention;

FIG. 2 is an enlarged partial schematic view of FIG. 1;

figure 3 shows a composite bottom cookware according to a second embodiment of the invention;

FIG. 4 is an enlarged partial schematic view of FIG. 3;

FIG. 5 is a cross-sectional view of the thermally conductive member of FIG. 3;

figure 6 shows a composite bottom cookware according to a third embodiment of the present invention;

FIG. 7 is an enlarged partial schematic view of FIG. 6;

FIG. 8 is a cross-sectional view of the thermally conductive member of FIG. 6;

fig. 9 is a cross-sectional view of a heat conducting element according to an embodiment of the present invention;

fig. 10 illustrates a top view of a heat conducting element according to an embodiment of the present invention;

fig. 11 illustrates a top view of a heat conducting element according to another embodiment of the present invention;

fig. 12 shows a composite bottom cookware according to a fourth embodiment of the present invention;

fig. 13 is a partially enlarged schematic view of fig. 12.

Description of the reference numerals

100 composite bottom cooker

1 pot bottom wall 2 bottom composite bottom sheet

3 intermediate connecting layer 301 through heat insulation hole

31 upper connecting layer 311 upper connecting layer heat insulation hole

32 thermally conductive element 321 thermally conductive element heat shield hole

322 heat conducting element heat insulation slot 33 lower connection layer

331 lower connection layer heat insulation hole

Detailed Description

The following detailed description of the embodiments of the present invention will be made with reference to the accompanying drawings. It is to be understood that the specific embodiments described herein are for purposes of illustration and explanation only and are not intended to limit the present invention.

Referring to the drawings, a composite bottom pot 100 according to the present invention is described below, and referring to fig. 1 to 13, the composite bottom pot 100 includes a pot bottom wall 1 and a bottom composite bottom sheet 2 fixedly connected to the bottom of the pot bottom wall 1, and a hole-groove heat insulation structure is provided between the pot bottom wall 1 and the bottom composite bottom sheet 2. The hole-groove heat insulation structure can be a hole-groove missing structure on a solid body structure between the pot bottom wall 1 and the bottom composite bottom sheet 2, so that a local discontinuous hollow structure is formed in the solid body structure between the pot bottom wall 1 and the bottom composite bottom sheet 2, the hole-groove heat insulation structure can form heat conduction and heat resistance, namely, the position where the hole-groove heat insulation structure is arranged between the pot bottom wall 1 and the bottom composite bottom sheet 2 can form heat resistance different from the solid body structure between the pot bottom wall 1 and the bottom composite bottom sheet 2, the heat conduction rate and the heat transfer speed of the position where the hole-groove heat insulation structure is formed in the composite bottom pot 100 can be changed, the temperature distribution of the pot bottom is improved, and the phenomenon that food materials are burnt and large oil smoke is generated due to the fact that a local area of the pot bottom is heated too. Meanwhile, the hole-groove heat insulation structure is arranged between the pot bottom wall 1 and the bottom composite bottom sheet 2, so that the using amount of interlayer materials can be reduced, the weight of the composite bottom pot 100 can also be reduced, the production and transportation cost can be reduced, and the light composite bottom pot 100 can improve the using convenience.

When a pot is generally used for heating on a heat source, the temperature distribution of the bottom of the pot is very uneven, the temperature rise of the area of the bottom of the pot close to the heat source is faster, the heating temperature is higher, and the temperature rise of the area of the bottom of the pot far away from the heat source is slower, and the heating temperature is lower. The utility model discloses a compound end pan 100 is provided with hole groove heat insulation structure between pot diapire wall and the compound film in bottom, and this hole groove heat insulation structure can form the heat conduction thermal resistance, and the accessible forms different thermal resistances in the different regions of the bottom of compound end pan from this and changes different regional heat conductivity and heat transfer rate to make the higher region of heating temperature and the lower regional heat transfer rate of heating temperature tend to be close, thereby make bottom of a boiler temperature distribution tend to evenly. Therefore, when cooking operation is carried out, for example, when cooking is carried out, the temperature of the local area of the pot bottom can not exceed the smoke point of the edible oil in a short time, the generation of large oil smoke is avoided, the food materials in the area, close to the heat source, of the pot bottom can be prevented from being burnt due to too fast heat transfer, and the cooking health and the eating health of a user are ensured.

The hole-groove heat insulation structure can be a hollow groove hole, and heat insulation materials can be filled in the hollow groove hole to increase heat resistance. The hole groove heat insulation structure can be set to be one or more, and if the hole groove heat insulation structure is set to be a plurality of, the distribution of the hole groove heat insulation structure can be regularly distributed and irregularly distributed. On the vertical projection plane of the pot bottom wall 1, the hole-groove heat insulation structure can be distributed in one of a plurality of ring shapes, a plurality of fan shapes, regular points and irregular points. The shape of the single-hole-and-slot heat insulation structure may be various, and may be, for example, a cylindrical shape, a rectangular parallelepiped shape, an irregular shape, or the like. If a multilayer structure is further sandwiched between the pan bottom wall 1 and the bottom composite bottom sheet 2 of the composite bottom pan 100, the hole-groove heat insulation structure may be disposed between any two adjacent layers or may be disposed between multiple layers in a penetrating manner. The hole groove heat insulation structure can have various arrangement forms, and the utility model is not limited to the same.

Optionally, the pot body of the composite bottom pot 100 may be made of a single layer of common materials such as stainless steel, aluminum alloy or cold-rolled steel sheet. Alternatively, in order to obtain better heat conduction and temperature equalization performance, the pot body of the composite-bottom pot 100 can also be made of 2 layers or more than 2 layers of composite plates, and the composite plates are usually made by compounding cold-rolled steel plates or stainless steel materials with aluminum or copper. The bottom composite bottom sheet 2 of the composite bottom pot 100 can be made of materials such as cold-rolled steel plates or ferromagnetic stainless steel with good magnetic conductivity, and therefore the magnetic field of the stove can be induced, so that the composite bottom pot 100 can be used for IH electromagnetic heating type stoves and not only suitable for open fire stoves, and the application range of the composite bottom pot 100 is expanded.

Furthermore, the position of the hole-groove heat insulation structure on the composite bottom cookware 100 can be optimally set according to the temperature distribution of the heat source, and the distribution density of the hole-groove heat insulation structure is higher in a second heated area which is close to the heat source, has faster temperature rise and higher heated temperature; in a first heated area which is far away from a heat source, has slow temperature rise and low heated temperature, the distribution density of the hole-groove heat insulation structure is low. If the composite bottom cookware 100 is a open-fire heating type cookware, such as cookware used on a gas range, the gas range flame usually consists of a central flame and an outer ring flame, and the heated region with higher heating temperature is the region of the outer ring flame, and the distribution density of the hole-groove heat insulation structure in the central part of the bottom wall 1 of the cookware is smaller than that in the non-central part. If the composite-bottom cookware 100 is an electromagnetic heating cookware, such as cookware used in an induction cooker, the central position of the induction cooker is a heated region with a higher heating temperature, and the distribution density of the hole-groove heat insulation structure in the central portion of the bottom wall 1 is greater than that in the non-central portion.

Optionally, an intermediate connecting layer 3 is disposed between the pan bottom wall 1 and the bottom composite bottom sheet 2, that is, two sides of the intermediate connecting layer 3 are respectively and fixedly connected to the pan bottom wall 1 and the bottom composite bottom sheet 2, and the hole-groove heat insulation structure is formed as a plurality of heat insulation cavities disposed in the intermediate connecting layer 3 and distributed at intervals in the transverse direction. The insulating cavity may be a through hole penetrating the intermediate connection layer 3, or may be a non-through groove in the intermediate connection layer 3, for example, a closed bubble-like structure in the intermediate connection layer 3. Due to the existence of the heat insulation cavity, a local discontinuous hollow structure is formed in a solid structure between the pan bottom wall 1 and the bottom composite bottom plate 2, so that the heat resistance is increased between the pan bottom wall 1 and the bottom composite bottom plate 2, namely the heat conduction speed of a position where the surfaces are not in contact is reduced.

Alternatively, the intermediate bonding layer 3 may comprise a brazing layer, and the pot bottom wall 1 and the bottom composite bottom sheet 2 may be welded together by a furnace brazing process to form the composite bottom pot 100. Before welding operation, respectively coating brazing filler metal on the positions, needing welding, of the bottom surface of the pot bottom wall 1 and the top surface of the bottom composite bottom sheet 2, assembling the pot bottom wall 1 and the bottom composite bottom sheet 2 into a composite bottom pot assembly, and finally placing the composite bottom pot assembly in a continuous furnace for brazing. During brazing, the brazing filler metal coated on a welding surface is melted at high temperature in a furnace to be changed into liquid, and the liquid brazing filler metal is melted and diffused mutually between the bottom surface of the pot bottom wall 1 and the top surface of the bottom composite bottom sheet 2 and is filled in a gap between the pot bottom wall 1 and the bottom composite bottom sheet 2. After cooling, an intermediate connecting layer 3 is formed between the bottom surface of the pot bottom wall 1 and the top surface of the bottom composite bottom sheet 2, so that the pot bottom wall 1 and the bottom composite bottom sheet 2 are fixedly connected together.

Wherein, the formation position of the intermediate connection layer 3 can be controlled by designing the coating position and coating amount of the brazing filler metal in advance to form the heat insulation cavity at a predetermined position. For example, a large amount of brazing material is applied to a position where the intermediate connection layer 3 is to be formed, so that it is easier to form a continuous intermediate connection layer 3 at the position after welding, that is, to form a first welding layer structure provided with a brazing layer, and no brazing material is applied to a position where a heat insulation cavity is to be formed, so that it is difficult to form the intermediate connection layer 3 at the position after welding, that is, to form a second gap structure without a brazing layer. It should be noted that when welding, the brazing filler metal will flow along the gap between the bottom wall 1 of the pot and the bottom sheet 2 due to the influence of capillary action, and when the heat insulation cavity is arranged by using the method, enough space needs to be reserved so as not to fill the gap with the flowing brazing filler metal.

Or, because the furnace brazing process has a high requirement on the size of the fit clearance between two welded parts, the fit clearance between the two welded parts is usually required to be less than 0.2mm, so that a completely filled connecting layer can be formed between the two parts, and if the fit clearance between the two parts is greater than 0.2mm, the liquid brazing filler metal cannot fill the clearance through capillary action in the welding process to form the completely filled intermediate connecting layer 3. Therefore, the forming position of the intermediate connecting layer 3 can be controlled by controlling the matching distance between the bottom surface of the pot bottom wall 1 and the top surface of the bottom composite bottom plate 2. At the position where the intermediate connecting layer 3 needs to be formed, the matching distance between the bottom surface of the bottom wall 1 of the pot and the top surface of the bottom composite bottom sheet 2 is controlled to be a first matching distance which can be completely filled with the brazing material, and the first matching distance is less than or equal to 0.2mm, so that the completely filled intermediate connecting layer 3 can be formed after welding without distribution of heat insulation cavities; and at the position where the intermediate connecting layer 3 is not required to be formed, controlling the matching space between the bottom surface of the bottom wall 1 of the pot and the top surface of the bottom composite bottom plate 2 to be a second matching space which cannot be completely filled by the brazing material, wherein the second matching space is larger than 0.2mm, so that the intermediate connecting layer 3 which cannot be completely filled is formed after welding, and a heat insulation cavity structure is formed.

Alternatively, the matching distance between the bottom surface of the pan bottom wall 1 and the top surface of the bottom sheet 2 can be changed by locally punching or milling a groove on the welding surface of the bottom surface of the pan bottom wall 1 and/or the top surface of the bottom sheet 2. The matching distance between the bottom surface of the pan bottom wall 1 and the top surface of the bottom composite bottom plate 2 can be changed by optimizing the shape of the welding surface of the bottom surface of the pan bottom wall 1 and/or the top surface of the bottom composite bottom plate 2. For example, the bottom composite bottom sheet 2 is provided with a shape which is locally convex towards the direction far away from the bottom wall 1 of the pot at the position where the heat insulation cavity is required to be arranged, so that the matching distance between the bottom surface of the bottom wall 1 of the pot at the position and the top surface of the bottom composite bottom sheet 2 is increased, and a heat insulation groove can be formed after welding. In addition, other processing methods such as drilling, grinding, planing, etc. may be used to increase the fit distance between the bottom surface of the bottom wall 1 of the pan and the top surface of the bottom sheet 2, but the present invention is not limited thereto.

The brazing process in the furnace is to place the workpiece in a high-temperature continuous furnace for welding, and the air in the furnace is less, so that the air in the hole-groove heat insulation structure formed after welding is less, and the risk that the composite-bottom pot 100 is locally deformed due to the fact that the air in the hole-groove heat insulation structure expands when the composite-bottom pot 100 is heated and used can be avoided. At this time, the composite bottom pot 100 may be made of stainless steel or iron, so that brazing filler metal with higher brazing temperature may be used for welding, such as copper brazing filler metal, the melting point of copper is 1083 ℃, the welding temperature of copper brazing filler metal is above 1100 ℃, there is substantially no air residue in the continuous furnace at this high temperature, and the risk of local expansion and deformation of the subsequent composite bottom pot 100 in use is lower. In addition, the high-melting-point copper brazing filler metal is used for welding, so that the heat-resistant temperature of the bottom composite bottom sheet 2 can be increased, and the reliability of the composite bottom pot 100 is improved.

In some embodiments, as shown in fig. 1 and 2, the hole-groove insulation structure is formed as a through insulation hole 301 penetrating the bottom surface of the pan bottom wall 1 and the top surface of the bottom backsheet 2. The thermal resistance formed by the heat insulation holes 301 is large, and the heat conduction speed at the position is reduced, so that the temperature distribution at the bottom of the cookware tends to be uniform. In addition, the hole-groove heat insulation structure may also be a heat insulation cavity structure that does not penetrate through the bottom surface of the pan bottom wall 1 and the top surface of the bottom sheet 2, such as a fully closed bubble-shaped structure in the intermediate connection layer 3, or a bubble-shaped structure in the intermediate connection layer 3 that only penetrates through one of the bottom surface of the pan bottom wall 1 and the top surface of the bottom sheet 2, but the invention is not limited thereto.

In some embodiments, the middle connection layer 3 includes an upper connection layer 31, a lower connection layer 33, and a heat conducting element 32 sandwiched between the upper connection layer 31 and the lower connection layer 33, a plurality of upper connection layer insulation holes 311 laterally spaced apart are disposed on the upper connection layer 31 and/or a plurality of lower connection layer insulation holes 331 laterally spaced apart are disposed on the lower connection layer 33, and the hole slot insulation structure includes one or both of the upper connection layer insulation holes 311 and the lower connection layer insulation holes 331. The heat conducting element 32 can be made of aluminum, copper and other materials with good heat conducting property, low hardness and strong adhesive force, and can be used for increasing the thickness of the bottom composite bottom sheet 2 and improving the heat conducting property of the bottom composite bottom sheet 2, so that the temperature distribution is more uniform when the bottom wall 1 of the pot is heated, and meanwhile, the strength of the bottom wall 1 of the pot can be improved, and the bottom wall 1 of the pot is not easy to generate convex-concave deformation when being heated. The upper joining layer 31 may be a brazing layer fixedly joining the bottom pan wall 1 and the heat conducting element 32, and the lower joining layer 33 may be a brazing layer fixedly joining the bottom cover sheet 2 and the heat conducting element 32.

In addition, the pot bottom wall 1 and the heat conducting element 32, or the bottom composite bottom sheet 2 and the heat conducting element 32 can be welded and connected by using an induction brazing process, so as to form the pot 100 with the composite bottom. Before the welding operation, the outer surface of the heat conducting element 32 is coated with brazing filler metal, then the pot bottom wall 1, the heat conducting element 32 and the bottom composite bottom sheet 2 are sequentially positioned and assembled into a composite bottom pot 100 component, and then the composite bottom pot 100 component is placed on a brazing device to be pressed and brazed. When the brazing filler metal is heated and brazed, the induction brazing process is similar to furnace brazing, and the description is omitted here. After cooling, an upper connecting layer 31 is formed at the position where the brazing filler metal is coated between the pot bottom wall 1 and the heat conducting element 32, and a lower connecting layer 33 is formed at the position where the brazing filler metal is coated between the bottom backing sheet 2 and the heat conducting element 32. An upper connection layer heat insulation hole 311 is formed at a position between the pot bottom wall 1 and the heat conducting element 32 where no brazing filler metal is coated, and a lower connection layer heat insulation hole 331 is formed at a position between the bottom double bottom plate 2 and the heat conducting element 32 where no brazing filler metal is coated. The thermal resistance formed by the upper connecting layer heat insulation hole 311 and/or the lower connecting layer heat insulation hole 331 is large, so that the heat conduction speed at the position is reduced, and the temperature distribution at the bottom of the cookware tends to be uniform.

In some embodiments, as shown in fig. 3 to 5, the hole and groove heat insulation structure includes not only the upper connection layer heat insulation hole 311 and/or the lower connection layer heat insulation hole 331, but also a plurality of heat conduction element heat insulation holes 321 which penetrate the heat conduction element 32 in the thickness direction and are distributed at intervals in the transverse direction, and the upper connection layer heat insulation hole 311, the heat conduction element heat insulation holes 321, and the lower connection layer heat insulation hole 331 are aligned one by one and are axially communicated with each other. That is, when the brazing material is applied to the heat-conductive surface of the heat-conductive element 32, the brazing material may not be applied to the position of the heat-conductive-element heat-insulating hole 321. Therefore, the heat resistance formed by the brazed upper connecting layer heat insulation hole 311, the heat conduction element heat insulation hole 321 and the lower connecting layer heat insulation hole 331 is large, the heat conduction speed at the position is reduced, and the temperature distribution at the bottom of the pot tends to be uniform.

In other embodiments, in addition to the through holes formed on the heat conducting elements 32, as shown in fig. 6 to 9, the hole and groove heat insulating structure includes not only the upper connection layer heat insulating hole 311 and/or the lower connection layer heat insulating hole 331 but also a plurality of heat conducting element heat insulating grooves 322 concavely formed on the lateral heat conducting surfaces of the heat conducting elements 32. The lateral heat-conducting surface is a heat-conducting surface of the heat-conducting element 32 perpendicular to the thickness direction, and the heat-conducting element heat-insulating groove 322 may be disposed on the heat-conducting surface on one side of the heat-conducting element 32, or may be disposed on the heat-conducting surfaces on both sides of the heat-conducting element 32. Before the heat conducting element 32 is soldered, the heat conducting surface of the heat conducting element 32 may be coated with a solder, and after the soldering, the upper connecting layer heat insulating holes 311 are aligned with the heat conducting element heat insulating grooves 322 on the top surface of the heat conducting element 32 one by one and axially communicated, and/or the lower connecting layer heat insulating holes 331 are aligned with the heat conducting element heat insulating grooves 322 on the bottom surface of the heat conducting element 32 one by one and axially communicated. Therefore, the heat-conducting element heat-insulating groove 322, the upper connecting layer heat-insulating hole 311 and/or the lower connecting layer heat-insulating hole 331 can form larger heat resistance to reduce the heat-conducting speed at the position, so that the temperature distribution of the bottom of the pot tends to be uniform. When the heat-conducting element heat-insulating grooves 322 are simultaneously arranged on the heat-conducting surfaces on both sides of the heat-conducting element 32, in order to improve the heat dispersion and transfer, optimize the heat transfer efficiency and optimize the heating uniformity of the cookware, the heat-conducting element heat-insulating grooves 322 on the top surface of the heat-conducting element 32 and the heat-conducting element heat-insulating grooves 322 on the bottom surface of the heat-conducting element 32 are arranged in a staggered manner, that is, any two heat-conducting element heat-insulating grooves 322 are not on the same vertical line.

Note that, when the intermediate connection layer 3 includes the upper connection layer 31, the lower connection layer 33, and the heat conduction element 32 interposed between the upper connection layer 31 and the lower connection layer 33, the heat conduction element 32 may not have a hole and groove structure, except for the illustrated embodiment, in which case, the hole and groove heat insulation structure includes only one or both of the upper connection layer heat insulation hole 311 and the lower connection layer heat insulation hole 331. Furthermore, the upper connection layer insulation hole 311 may also be formed as an insulation cavity structure that does not penetrate the bottom surface of the pan bottom wall 1 and the top surface of the heat conducting element 32, such as a fully closed bubble-like structure in the upper connection layer 31, or a bubble-like structure in the upper connection layer 31 that penetrates only one of the bottom surface of the pan bottom wall 1 and the top surface of the heat conducting element 32; the lower connecting layer heat insulation hole 331 may also be formed as a heat insulation cavity structure that does not penetrate the bottom surface of the heat conducting element 32 and the top surface of the bottom backsheet 2, such as a fully closed bubble-like structure in the lower connecting layer 33, or a bubble-like structure in the lower connecting layer 33 that penetrates only one of the bottom surface of the heat conducting element 32 and the top surface of the bottom backsheet 2. In addition, the heat conducting element 32 and the brazing layer may be more layers, or the heat conducting element 32 may be provided with the heat conducting element heat insulation hole 321, the heat conducting element heat insulation groove 322, and the like, which is not limited to this.

Further, as shown in fig. 10 and 11, the heat-conducting element heat-insulating holes 321 or the heat-conducting element heat-insulating grooves 322 may be regularly, uniformly or irregularly, and non-uniformly distributed on the heat-conducting surface of the heat-conducting element 32. The heat-conducting-element heat-insulating holes 321 or heat-conducting-element heat-insulating grooves 322 regularly and uniformly distributed on the heat-conducting surface of the heat-conducting element 32 can be processed by means of numerical control milling, drilling or the like, so that the requirements on equipment and precision are high, and the manufacturing cost is also high. The heat-conducting element heat-insulating holes 321 or heat-conducting element heat-insulating grooves 322 irregularly and unevenly distributed on the heat-conducting surface of the heat-conducting element 32 can be processed in a rolling manner, so that the manufacturing is simpler and the production cost is lower.

Further, when the brazing filler metal is applied, the heat-conducting element heat-insulating hole 321 or the heat-conducting element heat-insulating groove 322 may be filled with excessive brazing filler metal, so that the hole-groove heat-insulating structure cannot be formed, and thus, the size of the heat-conducting element heat-insulating hole 321 or the heat-conducting element heat-insulating groove 322 needs to be optimized. In order to prevent the heat-conducting element heat-insulating hole 321 from being too small in diameter and easily filled with the brazing filler metal, the diameter of the heat-conducting element heat-insulating hole 321 is set to be not less than 2 mm; for the heat-conducting element heat-insulating groove 322, the groove diameter of the heat-conducting element heat-insulating groove 322 is set to be not less than 2mm, and the depth of the heat-conducting element heat-insulating groove 322 is set to be not less than 1 mm. The heat-conducting element heat-insulating hole 321 or the heat-conducting element heat-insulating groove 322 may be processed most conveniently when they are set to be circular, and of course, the heat-conducting element heat-insulating hole 321 or the heat-conducting element heat-insulating groove 322 may also be in other shapes such as square, polygon, etc., for example, the present invention is not limited thereto.

In addition, in the actual manufacturing process of the composite-bottom pot, since the brazing filler metal coated on the surface of the heat conducting element 32 is melted by the high temperature of the brazing apparatus and becomes liquid at the time of welding, the liquid brazing filler metal may flow into the heat conducting element heat insulation hole 321 and/or the heat conducting element heat insulation groove 322 and be solidified into a brazing layer, that is, the upper connection layer 31 and/or the lower connection layer 33 may be partially formed in the heat conducting element heat insulation hole 321 and/or the heat conducting element heat insulation groove 322.

When welding is performed by using the induction brazing equipment, since the welding environment is open, air is present in the heat-conducting element heat-insulating hole 321 or the heat-conducting element heat-insulating groove 322 during welding, and the air in the hole-groove heat-insulating structure after welding cannot be exhausted because the hole-groove heat-insulating structure is closed. After the pan is heated, the air in the hole groove heat insulation structure expands, and after the pan is used for many times, the pan can be locally deformed. Therefore, furnace brazing can be preferably carried out, so that air in the hole-groove heat insulation structure is reduced, and the danger that the pot is possibly deformed locally after being heated is avoided. When furnace brazing is adopted, the matching distance of the positions where the intermediate connecting layers 3 need to be formed can be controlled to be less than or equal to 0.2mm, and the matching distance of the positions where the intermediate connecting layers 3 do not need to be formed is larger than 0.2 mm.

In some embodiments, the bottom composite bottom sheets 2 comprise a plurality of bottom composite bottom sheets arranged in a stacked manner along the thickness direction of the pot bottom wall 1, an intermediate connecting layer 3 is arranged between any two adjacent bottom composite bottom sheets 2, and at least one of the intermediate connecting layers 3 is provided with a hole-groove heat insulation structure. The hole and groove heat insulation structure in this embodiment may be one or more of the hole and groove heat insulation structures in the foregoing embodiments.

As shown in fig. 12 and 13, two layers of bottom composite bottom sheets 2 are arranged in a stacked manner along the thickness direction of a pot bottom wall 1, intermediate connecting layers 3 are arranged between every two adjacent bottom composite bottom sheets 2 and between the pot bottom wall 1 and the bottom composite bottom sheets 2, hole-groove heat insulation structures are arranged in the two intermediate connecting layers 3, heat resistance formed by the hole-groove heat insulation structures is large, the heat conduction speed of the position is reduced, and therefore the temperature distribution of the bottom of the pot tends to be uniform.

Wherein, the middle connecting layer 3 can be a brazing layer, the thickness of the composite bottom is larger due to the combination of the multiple layers of bottom composite bottom sheets 2, and the temperature distribution at the bottom of the cookware is more uniform. Different hole groove heat insulation structures can be arranged on different intermediate connection layers 3 so as to further optimize the temperature distribution of the bottom of the cookware. For example, the transverse density of the hole-groove heat insulation structure of the middle connecting layer 3 is decreased in the vertical upward direction of the bottom reciprocating bottom sheet 2 to the bottom wall 1 of the pot. Namely, the temperature of the middle connecting layer 3 which is closer to the heat source is higher, so that more hole-groove heat insulation structures can be arranged to reduce the heat conduction speed, and the phenomenon that the local temperature rise at the bottom of the pot is too fast and too high is avoided; and the middle connecting layer 3 far away from the heat source can be provided with fewer hole-groove heat insulation structures, so that heat can be more quickly transferred to food materials in the pot.

Optionally, in order to improve the heat dispersion and transfer, optimize the heat transfer efficiency, and optimize the heating uniformity of the cookware, as shown in fig. 12 and 13, the hole-groove heat insulation structures are distributed at intervals in the middle connection layer 3 along the transverse direction, and any two of the hole-groove heat insulation structures are not on the same vertical line.

Further, the heat insulation structure of the hole groove should not be set too much, otherwise, the heat conduction efficiency of the cooker can be affected, and the cooking food is not facilitated. When the intermediate connection layer 3 comprises a single structural layer or a plurality of structural layers, the total cross-sectional area of the hole-and-groove heat insulation structure should be less than 50% of the cross-sectional area of any structural layer of the intermediate connection layer 3. Therefore, the cookware has higher heat conduction efficiency, and the temperature distribution of the cookware can be optimized.

To sum up, the utility model provides a novel composite bottom pan 100, this composite bottom pan 100 is provided with the hole groove heat-proof structure that is used for forming heat conduction thermal resistance between pot bottom wall 1 and bottom composite bottom sheet 2, the accessible forms different thermal resistances in the different regions of the bottom of composite bottom pan from this and changes the heat transfer rate in different regions, so that the heat transfer rate in the higher region of heating temperature and the lower region of heating temperature tends to be close, thereby make the temperature distribution of pan bottom tend to evenly, not only can avoid producing great oil smoke when the culinary art operation, still can avoid the regional edible material of pan bottom near the heat source to lead to the burnt because of the heat transfer is too fast, ensure that the culinary art of user is healthy and healthy. Meanwhile, the hole-groove heat insulation structure is arranged between the pot bottom wall 1 and the bottom composite bottom sheet 2, so that the using amount of interlayer materials can be reduced, the weight of the composite bottom pot 100 can also be reduced, the production and transportation cost can be reduced, and the light composite bottom pot 100 can improve the using convenience.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on the orientations or positional relationships illustrated in the drawings, and are used for convenience in describing the present invention and for simplicity in description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention. Furthermore, 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," and "fixed" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally formed; may be mechanically coupled, may be electrically coupled or may be in communication with each other; 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 meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.

In the present application, unless expressly stated or limited otherwise, the first feature may be directly on or directly under the second feature or indirectly via intermediate members. 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.

In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," 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 are not necessarily intended to 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. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.

Although embodiments of the present invention have been shown and described, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and that variations, modifications, substitutions and alterations can be made to the above embodiments by those of ordinary skill in the art without departing from the scope of the present invention.

Claims (21)

1. The utility model provides a pot with composite bottom, its characterized in that, pot with composite bottom include the pot diapire and fixed connection in the compound film in bottom of pot diapire bottom, the pot diapire with be provided with the heat-proof structure of hole groove between the compound film in bottom.

2. The composite bottom cookware of claim 1, wherein an intermediate connection layer is provided between the bottom wall of the cookware and the bottom composite bottom sheet, and the hole-groove heat insulation structure is formed as a plurality of heat insulation cavities which are provided in the intermediate connection layer and distributed at intervals along the transverse direction.

3. The composite bottom cookware of claim 2, wherein said hole-slot insulation structure is formed as a through insulation hole through the bottom surface of said bottom pan wall and the top surface of said bottom replica.

4. The composite bottom cookware according to claim 2, wherein said intermediate connection layer comprises an upper connection layer, a lower connection layer and a heat conducting element sandwiched between said upper and lower connection layers,

a plurality of upper connecting layer heat insulation holes which are distributed at intervals along the transverse direction are arranged on the upper connecting layer; and/or a plurality of lower connecting layer heat insulation holes distributed at intervals along the transverse direction are arranged on the lower connecting layer;

the hole groove heat insulation structure comprises the upper connecting layer heat insulation hole and/or the lower connecting layer heat insulation hole.

5. The composite-bottom cookware according to claim 4, wherein the hole-and-groove insulation structure further comprises a plurality of heat-conducting element insulation holes extending through the heat-conducting elements in the thickness direction and distributed laterally at intervals, and the upper-connection-layer insulation holes, the heat-conducting element insulation holes and the lower-connection-layer insulation holes are aligned one by one and axially communicated;

and/or the hole-groove heat insulation structure further comprises a plurality of heat conduction element heat insulation grooves which are concavely formed on lateral heat conduction surfaces of the heat conduction elements, and the upper connecting layer heat insulation holes and/or the lower connecting layer heat insulation holes are aligned with the heat conduction element heat insulation grooves one by one and are axially communicated with the heat conduction element heat insulation grooves.

6. The composite bottom cookware according to claim 5, wherein the heat-conducting element heat-insulating hole is a circular hole and the diameter of the heat-conducting element heat-insulating hole is greater than or equal to 2 mm; or the cross section of the heat-conducting element heat-insulating groove is circular, the diameter of the heat-conducting element heat-insulating groove is larger than or equal to 2mm, and the depth of the heat-conducting element heat-insulating groove is larger than or equal to 1 mm.

7. The composite-bottom cookware according to claim 4, wherein said hole-and-groove thermal insulation structure further comprises a plurality of heat-conducting element thermal insulation holes extending through said heat-conducting element in a thickness direction and laterally spaced apart from each other, and/or said hole-and-groove thermal insulation structure further comprises a plurality of heat-conducting element thermal insulation grooves concavely formed on lateral heat-conducting surfaces of said heat-conducting element,

wherein the upper connection layer and/or the lower connection layer may be partially formed in the heat conductive element heat insulation hole and/or the heat conductive element heat insulation groove.

8. The composite bottom cookware according to any one of claims 2 to 7, wherein the bottom composite bottom sheets comprise a plurality of bottom composite bottom sheets which are arranged in a stacked manner along the thickness direction of the bottom wall of the cookware, the intermediate connecting layer is arranged between any two adjacent bottom composite bottom sheets, and at least one of the intermediate connecting layers is provided with the hole-groove heat insulation structure.

9. The composite bottom cookware of claim 8, wherein a lateral density of said cellular insulation of said intermediate connection layer decreases in a vertically upward direction of said bottom reciprocating sheet toward said bottom pot wall.

10. The composite-bottom cookware according to claim 8, wherein the hole-and-groove insulation structures are distributed at intervals in the transverse direction on the middle connection layer, and any two of the hole-and-groove insulation structures are not on the same vertical line.

11. The composite bottom pot according to claim 8, wherein the intermediate connection layer is a brazing layer and the brazing layer is formed of a copper brazing filler metal;

and/or the bottom double-bottom plate is made of one of a cold-rolled steel plate material with magnetic permeability and a ferromagnetic stainless steel material;

and/or, the pot diapire is one of individual layer's not magnet steel material, aluminum alloy material and cold-rolled steel sheet material, perhaps, the pot diapire is the multilayer composite sheet including stratum basale and heat-conducting layer, the stratum basale is cold-rolled steel sheet material and/or stainless steel material, the heat-conducting layer is copper material and/or aluminium material.

12. The composite bottom cookware of claim 8, wherein the mating structure between two of said bottom composite sheets comprises a first mating spacing that is capable of being completely filled with a brazing material and a second mating spacing that is not capable of being completely filled with a brazing material, said second mating spacing being greater than said first mating spacing, said well insulation structure comprising said mating structure formed at said second mating spacing.

13. The composite bottom cookware according to claim 12, wherein said first engagement distance is less than or equal to 0.2mm and said second engagement distance is greater than 0.2 mm.

14. The composite bottom cookware according to claim 8, wherein the structure between the two bottom composite bottom sheets comprises a first welding layer structure provided with a brazing layer and a second void structure without a brazing layer, and the hole-groove thermal insulation structure comprises the second void structure.

15. The composite bottom cookware of claim 2, wherein said hole and groove insulation structure is distributed between said bottom wall and said bottom composite bottom sheet in one of a plurality of rings, a plurality of sectors, regular dots and irregular dots in a lateral direction.

16. The composite bottom cookware according to claim 2, wherein said intermediate connection layer is a brazing layer; or the middle connecting layer comprises an upper connecting layer, a lower connecting layer and a heat conducting element or the bottom composite bottom plate clamped between the upper connecting layer and the lower connecting layer, and the upper connecting layer and the lower connecting layer are brazing layers.

17. The composite bottom cookware according to claim 2, wherein said intermediate connection layer comprises a single structural layer or a plurality of structural layers and wherein, in the cross-section of any one of said structural layers, the total cross-sectional area of said cell insulation structure is less than 50% of the cross-sectional area of said structural layer.

18. The composite bottom pot as claimed in claim 1, wherein the heated bottom region of the composite bottom pot comprises at least a first heated region and a second heated region having a higher heating temperature than the first heated region, and the distribution density of the hole-and-groove insulation structure in the second heated region is greater than the distribution density of the hole-and-groove insulation structure in the first heated region.

19. The composite bottom cookware of claim 4, wherein the bottom composite bottom sheet comprises a plurality of bottom composite bottom sheets stacked in the thickness direction of the bottom wall of the cookware, the intermediate connection layer is arranged between any two adjacent bottom composite bottom sheets, at least one of the intermediate connection layers is provided with the hole-groove heat insulation structure, and the heat conducting element is one of a copper material and an aluminum material.

20. The composite bottom cookware according to claim 4, wherein the bottom composite bottom sheet comprises a plurality of bottom composite bottom sheets arranged in a stacked manner in a thickness direction of the bottom wall, the intermediate connection layer is arranged between any two adjacent bottom composite bottom sheets, at least one of the intermediate connection layers is provided with the hole-groove heat insulation structure, the matching structure between any two adjacent bottom walls of the bottom wall, the heat conduction element and the bottom composite bottom sheet comprises a first matching interval capable of being completely filled with brazing material and a second matching interval incapable of being completely filled with brazing material, the second matching interval is larger than the first matching interval, and the hole-groove heat insulation structure comprises the matching structure formed at the second matching interval.

21. The composite bottom cookware according to claim 4, wherein the bottom composite bottom sheet comprises a plurality of bottom composite bottom sheets arranged in a stacked manner along a thickness direction of the bottom wall of the cookware, the intermediate connection layer is arranged between any two adjacent bottom composite bottom sheets, at least one of the intermediate connection layers is provided with the hole-groove heat insulation structure, any two adjacent bottom walls of the cookware, the heat conduction element and the bottom composite bottom sheet comprise a first welding layer structure provided with a brazing layer and a second gap structure without a brazing layer, and the hole-groove heat insulation structure comprises the second gap structure.

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