CN215993614U - Hollow composite pot bottom and composite pot thereof - Google Patents

Abstract

The utility model discloses a hollow composite pot bottom and a composite pot thereof, wherein the hollow composite pot bottom comprises an outer pot body, an inner pot body, a heat conducting medium and a support body, the bottoms of the outer pot body and the inner pot body are connected through the support body, and the outer pot body, the inner pot body and the support body are integrally processed and formed; the body and the inner pot body of the composite pot are integrally formed; the cavity without the support body at the joint of the outer pot body and the inner pot body is a medium bin, a plurality of heat conduction holes are formed in the support body, the heat conduction holes are communicated with the medium bin to form a sealed cavity, and a heat conduction medium is injected into the sealed cavity; the energy on the outer pot body transfers heat to the inner pot body through the supporting body and the heat-conducting medium. In order to improve the heat transfer speed of the pot body and reduce the waste of heat energy, the heat conducted on the outer pot body transfers heat to the inner pot body through the supporting body and the heat-conducting medium. The heat on the outer pot body is transferred to the inner pot body and the heat-conducting medium through the conduction of the supporting body, and the heat on the outer pot body is transferred to the inner pot body for heat transfer and uniform heating through the convection of the phase change of the heat-conducting medium.

Description

Hollow composite pot bottom and composite pot thereof

Technical Field

The utility model relates to the field of kitchenware, in particular to a hollow composite pot bottom and a composite pot thereof.

Background

The bottom of the existing composite pot is a solid composite material pot bottom which is formed by stainless steel layers, the center of the pot bottom is possibly red due to high temperature, and the center of the pot bottom becomes a high-temperature overheat point. The stress of different materials of the multi-layer pot bottom is very large due to thermal expansion under the condition of uneven heat conduction, cracking or welding failure occurs due to creeping caused by different thermal expansion coefficients of different materials, and the uneven problem occurs to the pot bottom due to the thermal expansion of different materials. The processing technology of the composite layer bottom pot is complex, the production efficiency is low, the processing cost is high and the like; the pot with the composite layer bottom is heavy and has uncomfortable hand feeling during cooking.

Patent 212234100U discloses a multi-layer composite pot, which comprises an inner pot body, an outer pot body, a heat conductor and a bracket. The bracket is an I-shaped metal strip or a metal round pad; the bracket is fixed between the inner pot body and the outer pot body by welding or sintering. The outer pot body, the inner pot body and the support of the multilayer composite pot are of a combination structure of different materials, the creeping caused by different thermal expansion coefficients of different materials under the action of high temperature is caused, the outer pot body and the inner pot body support are easy to fall off after a long time, and the problem that the outer pot body and the inner pot body are uneven is caused. The fixed welding processing technique of the outer pot body, the inner pot body and the bracket is complex, the production efficiency is low, and the processing cost is high.

1963 heat pipe utility model since, from early aerospace application gradually developed civilian field, the inside negative pressure state of being taken out into of heat pipe is filled into suitable liquid medium, through liquid-gas phase transition heat transfer, the heat pipe has quick heat conductivity, good isothermal nature, provides quick heat conduction and radiating assurance. At present, the heat pipe technology is applied to a composite pot, a heat transfer cavity of the composite bottom pot is made of a combination of multiple materials, and the composite bottom pot made of different materials has different expansion rates at high temperature, so that the pot body is easy to deform.

SUMMERY OF THE UTILITY MODEL

The utility model aims to solve the problems and provides a hollow composite bottom pot and a manufacturing method thereof.

The utility model realizes the purpose through the following technical scheme:

a hollow composite pan bottom, comprising: the outer pot body, the inner pot body, the supporting body and the heat conducting medium; the outer pot body and the bottom of the inner pot body are connected through a support body, and the outer pot body, the inner pot body and the support body are integrally processed and formed.

The cavity of the joint of the outer pot body and the inner pot body without the support body is a medium bin, a plurality of heat conduction holes are formed in the support body, the heat conduction holes are communicated with the medium bin to form a sealed cavity, and a heat conduction medium is injected into the sealed cavity; the arrangement of the heat-conducting holes in the support body is longitudinal or the layout is set according to the design requirements of the process.

The energy on the outer pot body transfers heat and uniformly heats to the inner pot body through the supporting body and the heat-conducting medium.

Preferably, the cavity level of the medium bin is higher than the height of the heat conduction hole.

Preferably, the outer pot body, the inner pot body and the support body are integrally processed and formed by adopting a metal material. The outer pot body, the inner pot body and the supporting body are integrally processed and formed by aluminum profiles or are integrally processed and formed by metal casting.

Preferably, the longitudinal section of the heat conduction hole is circular, oval, triangular or trapezoidal; the heat conducting holes are designed to be in proper sizes and shapes according to the requirements of the size, the thickness and the phase change of the heat conducting medium of the hollow composite pot bottom.

Preferably, a wick structure is arranged in the heat conduction hole; the liquid absorption core structure is a hot-melt slag structure, a groove structure or a multiple metal mesh structure.

Preferably, the heat-conducting medium is a liquid medium, and heat transfer soaking of liquid-gas phase change is performed in the sealed cavity.

Preferably, the heat conducting medium is a low-melting-point solid medium, and heat transfer soaking of solid-liquid phase change is performed in the sealed cavity.

The heat-conducting medium is preferably an alloy with a melting point of 70-200 ℃, or other suitable solid media such as molten salt and the like and a solid composite structure of the components; or other suitable liquid medium such as deionized water, alcohol (ethanol), acetone, diethyl ether, etc.

Also provides a composite pot, which comprises the hollow composite pot bottom.

Further, the pot body is integrally formed with the inner pot body, and a handle is connected to the upper portion of the pot body close to the upper portion.

The heat transfer method and the soaking advantage of the hollow composite pot bottom of the utility model are as follows:

1. a hollow composite bottom pot with heat-conducting medium for liquid-gas phase change is a special heat pipe. The outer pot body of the hollow composite bottom pot is a heat transfer heated end, and the inner pot body is a heat conduction radiating end; the heat-conducting medium carries out phase change heat transfer in the medium bin and the heat-conducting holes, and the liquid or gas heat-conducting medium transfers the heat on the outer pot body to food materials, oil or water in the pot through the inner pot body.

2. The liquid phase has obvious backflow effect after the phase change conversion of the medium in the medium bin and the heat conducting hole, low expansion thermal resistance and uniform heat flux; the phase-change heat-conducting medium enlarges the heat transfer speed of the heat on the outer pot body, improves the heat-conducting and radiating effect of the heat on the inner pot body, and improves the effective utilization rate of the heat.

3. When the outer pot body is heated by the induction cooker or the liquefied gas, the heating area of the outer pot body is determined by the induction cooker or the liquefied gas, the size of the heating area of the liquefied gas flame covering the outer pot body is fixed, the heat transfer area of the local outer pot body is limited, and the local hot spot of the pot body can be caused. The heat generated by the induction cooker or the liquefied gas is directly transferred to the heat-conducting medium body in the heat-conducting cavity by the outer pot body, and the heat is also transferred to the supporting body by the outer pot body. The heat conducting medium heat transfer and heat dissipation area is enlarged to the whole inner pot body on the hollow composite pot bottom, the large heat dissipation area accelerates the quick heat conduction and heat dissipation of heat energy, and the effective utilization rate of heat generated by an induction cooker or liquefied gas is improved.

4. The outer pot body, the inner pot body and the support body are combined to form an integrated hollow composite pot bottom, the hollow composite pot bottom is made of the same material, and the hollow structure of the hollow composite pot bottom is excellent in mechanical property. The hollow composite pot bottom with the same-pole material structure has high compressive strength, the plane pressure-bearing efficiency of the pot bottom is improved, the hollow composite pot bottom cannot expand and deform after being heated, and the problem that the pot bottom is concave and convex due to thermal expansion of different materials of the conventional pot composite bottom is solved.

5. When the heat-conducting medium in the heat-conducting hole conducts phase change heat, the heat-conducting medium with the increased volume can overflow the heat-conducting hole to enter the medium bin, the heat-conducting medium with the decreased volume in the heat-conducting hole can be subjected to incremental compensation by the heat-conducting medium in the medium bin, the number of the heat-conducting medium in the heat-conducting hole is adjusted by the medium bin of the circle around the pot body, and the hollow composite pot bottom is prevented from bulging and deforming due to phase change of the heat-conducting medium.

6. Through the weight reduction design of the pot bottom, the hollow composite pot bottom achieves the same effect when the pressure of the working medium is changed from liquid to gas compared with the existing product, the volume of the medium bin and the heat conduction holes is 40-75% of the volume of the hollow composite pot bottom, compared with the solid composite pot bottom, the weight of the hollow composite pot bottom is reduced by 35-70%, and the usage amount of the corresponding metal material is reduced by 35-70%. The composite pot has the advantages of light weight, comfortable hand feeling during frying, low cost and the like.

The application discloses a heat transfer process and effect of a hollow composite pot bottom: in order to improve the heat transfer speed of the pot body and reduce the waste of heat energy, the heat conducted by the induction cooker or the liquefied gas on the outer pot body transfers heat to the inner pot body through the supporting body and the heat-conducting medium. The heat on the outer pot body is transferred to the inner pot body and the heat-conducting medium through the conduction of the supporting body, and the heat on the outer pot body is transferred to the inner pot body for heat transfer and uniform heating through the convection of the phase change of the heat-conducting medium. The support body, the heat conducting holes and the heat conducting medium in the medium bin increase the heat transfer and heat dissipation area of heat and improve the heat transfer speed of heat energy.

Firstly, the heat of the induction cooker or the liquefied gas transferred on the outer pot body is directly transferred and transferred to the upper inner pot body and the heat-conducting medium through the supporting body, so that the heat transfer speed of the heat energy is increased, and the quick supply of large heat required by cooking is met.

And secondly, heat carried by the phase-change heat-conducting medium is subjected to convection heat transfer on the inner pot body on the hollow composite pot bottom, so that the heat-conducting and heat-dissipating area of the heat on the inner pot body is increased. Local high temperature heat on the outer pot body and the inner pot body is soaked after being conducted through the heat conducting medium in the heat conducting holes and the medium bin in a communicated convection mode, the heat conducting area is increased, the effective utilization rate of heat is improved, overheating of the central pot body of the inner pot body is avoided, the temperature of the inner pot body is adjusted and balanced, the coating is prevented from being damaged due to pyrolysis, and oil smoke generation during cooking is reduced.

The hollow composite pot bottom can also be applied to cooking utensils such as baking pans, frying pans, electric cookers, milk pots and the like.

Compared with the existing composite pot bottom, the utility model has the following beneficial effects: a hollow composite pot bottom comprises an outer pot body, an inner pot body, a support body and a heat-conducting medium. The liquid phase has obvious backflow effect after the phase change conversion of the medium in the medium bin and the heat conducting hole, low expansion thermal resistance and uniform heat flux; the heat on the outer pot body transfers heat to the inner pot body through the supporting body and the heat-conducting medium, the heat-conducting medium with phase change enlarges the heat transfer area of the outer pot body, enhances the heat transfer speed of the inner pot body, and improves the effective utilization rate of heat energy. The hollow composite pan bottom avoids overheating on the central pan body of the inner pan body, reduces the damage of the coating due to pyrolysis and avoids the generation of oil smoke. The integrated hollow composite pan bottom improves the plane pressure-bearing efficiency of the pan bottom, the hollow composite pan bottom cannot expand and deform after being heated, and the problem that the pan bottom is concave and convex due to thermal expansion of different materials of the existing pan composite bottom is avoided; the composite pot has the advantages of light weight, comfortable hand feeling during frying, low cost and the like.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.

FIG. 1 is a front view of the present invention;

FIG. 2 is a right side view of the present invention;

FIG. 3 is an isometric view of the present invention;

FIG. 4 is a sectional view A-A of FIG. 1;

fig. 5 is a sectional view B-B of fig. 2.

The reference numerals are explained below:

1. a pot body; 2. an inner pot body; 3. an outer pot body; 4. a heat conduction hole; 5. a support body; 6. a media hopper; 7. a handle.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the technical solutions of the present invention will be described in detail below. It is to be understood that the described embodiments are merely exemplary of the utility model, and not restrictive of the full scope of the utility model. All other embodiments, which can be derived by a person skilled in the art from the examples given herein without any inventive step, are within the scope of the present invention.

Referring to fig. 1 to 5, the present invention provides a hollow composite pot bottom, including: the outer pot body 3, the inner pot body 2, the supporting body 5 and the heat conducting medium; the outer pot body 3 is connected with the bottom of the inner pot body 2 through a support body 5, and the outer pot body 3, the inner pot body 2 and the support body 5 are integrally processed and formed; optionally, the outer pot body 3, the inner pot body 2 and the support body 5 are integrally formed by aluminum profiles. The outer pot body 3, the inner pot body 2, the supporting body 5 and the heat conducting hole 4 are combined to form the hollow composite pot bottom integrated into a whole, the manufacturing material of the hollow composite pot bottom is the same material, the mechanical property of the hollow composite pot bottom hollow structure is excellent, the hollow composite pot bottom with the same-pole material structure has high compressive strength, the plane pressure-bearing efficiency of the pot bottom is improved, the hollow composite pot bottom cannot expand and deform after being heated, and the problem that the pot bottom is concave and convex due to thermal expansion of different materials of the existing pot composite bottom is avoided.

The cavity that the junction of outer pot body 3, the interior pot body 2 does not have supporter 5 is medium storehouse 6, a plurality of heat conduction holes 4 have been seted up on the supporter 5, and is optional, the longitudinal section shape of heat conduction hole 4 is circular, oval, triangle-shaped or trapezoidal. The heat conduction holes 4 are communicated with the medium bin 6 to form a sealed cavity, and a heat conduction medium is injected into the sealed cavity; the cavity level of the medium bin 6 is higher than the height of the heat conduction hole 4. The energy on the outer pot body 3 transfers heat to the inner pot body 2 through the supporting body 5 and the heat-conducting medium. A hollow composite bottom pot with heat-conducting medium for liquid-gas phase change is a special heat pipe. An outer pot body 3 of a hollow composite bottom of the hollow composite bottom pot is a heat transfer heated end, and an inner pot body 2 is a heat conduction radiating end; the heat-conducting medium carries out phase change heat transfer in the medium bin 6 and the heat-conducting holes 4, and the liquid or gas heat-conducting medium transfers the heat on the outer pot body 3 to food materials, oil or water in the pot through the inner pot body 2.

When the heat-conducting medium in the heat-conducting hole 4 carries out phase change heat transfer, the heat-conducting medium of volume grow can spill over the heat-conducting hole 4 and get into the medium storehouse 6, and the heat-conducting medium that the volume diminishes in the heat-conducting hole 4 can be carried out the incremental compensation by the heat-conducting medium in the medium storehouse 6, and the heat-conducting medium's in the heat-conducting hole 4 is being adjusted to the medium storehouse 6 of round around the pot body how much, has ensured that the compound bottom of a boiler of cavity can not be because of the bulging deformation that the heat-conducting medium phase change caused. Moreover, the liquid phase backflow effect after the medium phase change conversion in the medium bin 6 and the heat conduction hole 4 is obvious, the expansion thermal resistance is low, and the heat flux is uniform; the phase-change heat-conducting medium enlarges the heat transfer speed of the heat on the outer pot body 3, improves the heat-conducting and heat-dissipating effect of the heat on the inner pot body 2, and improves the effective utilization rate of the heat. Compared with the existing pan bottom, the heat conducting holes 4 and the medium bin 6 are in weight reduction design, the hollow composite pan bottom during liquid-gas phase change of the heat conducting medium achieves the same effect as the existing product, the volume of the medium bin 6 and the heat conducting holes 4 is 40-75% of the volume of the hollow composite pan bottom, and compared with the pan bottom with the solid composite pan bottom, the weight of the hollow composite pan bottom is reduced by 35-70%. The corresponding metal material also reduces the usage amount by 35-70%, and the composite pot has the advantages of light weight, comfortable hand feeling during frying, low cost and the like.

When the outer pot body 3 is heated by an induction cooker or liquefied gas, the heating area of the outer pot body 3 is determined by the induction cooker or the liquefied gas, the heating area of the position of the liquefied gas flame covering the outer pot body 3 is fixed, the heat transfer area of the local outer pot body 3 is limited, and the local hot spot of the pot body can be caused. The heat generated by the induction cooker or the liquefied gas is directly transferred to the heat-conducting medium in the heat-conducting hole 4 by the outer pot body 3, and the heat is also transferred to the supporting body 5 by the outer pot body 3. The heat conducting medium heat transfer and heat dissipation area is enlarged to the whole inner pot body 2 on the hollow composite pot bottom, the large heat dissipation area accelerates the quick heat conduction and heat dissipation of heat energy, and the effective utilization rate of heat generated by an induction cooker or liquefied gas is improved.

As a preferred embodiment of the present invention, a wick structure is disposed in the heat conduction hole 4; the liquid absorption core structure is a hot-melt slag structure, a groove structure or a multiple metal mesh structure. The heat conducting holes 4 with the wick structure design are convenient for convection of heat conducting media, and the wick structure plays a vital role in the soaking heat transfer design of the hollow composite bottom pot. 1. The hot-melting slag structure: the metal powder with a certain mesh number is sintered on the inner hole surface of the heat conduction hole 4 to form a sintered powder tube core integrated with the hole wall, and a metal wire mesh is also used for sintering the tube core on the inner wall surface of the tube. 2. Multiple metal meshes: the fabric is a metal fabric made of metal wires, a plurality of gaps exist among the small metal wires, but the fabric structure does not allow the fabric to block the heat conduction holes 4 in a wrong way. The wall of the heat conducting hole 4 and the single-layer and multi-layer metal fabrics are also well jointed, the number of the layers of the metal fabric meshes is from l to 4 or more, and the mesh number of each layer of the metal fabric mesh can be the same or different. 3. The groove structure is that the inner wall of the heat conduction hole 4 is provided with an axial thin groove or a flow guide strip to provide a capillary pressure head and a liquid backflow channel, or an angular structure at the lower end of the elliptical or trapezoidal or triangular heat conduction hole 4 is a parallel channel, the flow guide strip of the circular heat conduction hole 4 forms one or more parallel channels, the channels are also like capillary vessels, the flow resistance of a liquid medium is small, and the backflow liquid medium absorbs heat and transfers heat in the bottom of the hollow composite pot through the channels.

Preferably, the heat conducting medium is a low-melting-point solid medium, and heat transfer soaking of solid-liquid phase change is performed in the sealed cavity. The low-melting-point solid medium is preferably an alloy with a melting point of 70-180 ℃ or a molten salt. After the low-melting-point heat-conducting medium is melted, the liquid level line of the liquid low-melting-point heat-conducting medium in the medium bin 6 exceeds the heat-conducting hole 4, and the liquid low-melting-point heat-conducting medium is filled in the heat-conducting hole 4. The solid state transition of a low melting solid medium to a liquid state must, if it works well: 1. continuously; 2. the solid state is converted into the liquid state, and the segregation is avoided; 3. solid-liquid-solid must be positionally fixed and can alternate many times (taking into account stress effects); 4. the medium does not react with the base material of the pot body, otherwise the medium is easy to corrode.

Optionally, the heat conducting medium is a liquid medium, and the heat soaking in the sealed cavity is performed by liquid-gas phase change heat transfer. The liquid medium is preferably deionized water, alcohol (ethanol), acetone, diethyl ether, or other suitable liquid medium. The liquid heat-conducting medium is selected, because the effective working temperature of the pot body depends on the phase-change heat-conducting medium, the heat-conducting medium can not react with the matrix materials such as aluminum, stainless steel, iron, titanium alloy and the like.

The utility model also provides a composite pot which comprises the hollow composite pot bottom.

Further, still include the pot body 1, this pot body 1 with interior pot body 2 adopts integrated into one piece, just pot body 1 is close to the upper portion and is connected with handle 7.

As an optional preparation method of a composite pot, the scheme provides a hollow composite pot bottom and a preparation method of the composite pot, the hollow composite pot bottom is made of an aluminum profile material, and the preparation method comprises the following steps:

the method comprises the following steps: manufacturing a corresponding aluminum profile die according to the section design of the pot body, extruding and molding a heated aluminum cylindrical rod from the die into a plate-type aluminum profile by adopting an extruder, and cutting and processing the extruded plate-type aluminum profile by using cutting equipment to serve as a pot making material for later use; an air-cooled quenching process and a subsequent artificial aging process are also used during extrusion to complete heat treatment strengthening. The die making and extrusion process of the aluminum profile are mature technologies, and the utility model is not described in detail.

The thickness of the hollow composite pot bottom of the plate-type aluminum profile is 5-12 mm; the width of the inner pot body 2 is 310-850 mm, and the thickness of the inner pot body 2 is 0.8-3 mm; the width of the outer pot body 3 is 85-320 mm, and the thickness of the outer pot body 3 is 0.5-2 mm.

The extruded plate type aluminum profile is cut by cutting equipment into an outer pot body 3 with the diameter of 300-800 mm, the diameter of the outer pot body 2 is 80-300 mm, the outer pot body 3 exceeding the diameter of the inner pot body 2 within the range of 80-300 mm is cut off, the surface of the inner pot body 2 for cutting off the outer pot body 3 is smooth, and the later pot body surface treatment is facilitated. And manufacturing the processed plate type aluminum profile as a pan manufacturing material for standby.

Step two: the plate-type aluminum profile is cut through a cutting device to form an integrated pot body 1, an inner pot body 2, an outer pot body 3 and a support body 5, wherein the outer edge of the inner pot body 2 is 10-60 mm inward; forming heat conduction holes 4 on the support body 5, wherein the aperture of each heat conduction hole 4 is 2-6 mm; after the supporting body 5 is cut and processed, a space with the length of 10-60 mm is formed between the inner pot body 2 and the outer pot body 3, and the distance between the inner pot body 2 and the outer pot body 3 is 3-10 mm.

1 ~ 2 blast pipes that are used for bleeding and carry heat-conducting medium are installed in advance between the upper edge of the outer pot body 3 and the inner pot body 2, and the one end of blast pipe and medium storehouse 6 and heat conduction hole 4 between the outer pot body 3 and the inner pot body 2 are communicating, and the other end of blast pipe extends the upper edge of the outer pot body 3. Note: the exhaust pipe is not shown in the drawings attached to the present specification.

Step three: and (3) stamping the aluminum profile processed in the step (II) into a pot body by a stamping machine through a die, wherein the outer pot body 3 is fixedly connected with the inner pot body 2, and the outer pot body 3 and the inner pot body 2 can be fixed into a whole by welding, riveting and other methods. After the outer pot body 3 and the inner pot body 2 are fixed into a whole, a cavity without a support body 5 at the joint of the outer pot body and the inner pot body forms a medium bin 6, and the medium bin 6 is communicated with the heat conduction hole 4; the medium bin 6 around the inner pot body 2 plays a role in adjusting the quantity of heat-conducting media in the heat-conducting holes 4, the heat-conducting media in the medium bin 6 can enter the heat-conducting holes 4, the heat-conducting media in the heat-conducting holes 4 can also enter the medium bin 6, and the heat-conducting media are converged and flow in the medium bin 6.

Step four: the welding quality of the joint of the outer pot body 3 and the inner pot body 2 is tested for leakage detection, and the medium bin 6 and the heat conduction hole 4 are ensured to be well sealed; the welding quality of the joint of the outer pot body 3 and the inner pot body 2 is subjected to leak detection test, the welding fixation and sealing of the joints around the outer pot body 3 and the inner pot body 2 are ensured to be good, and the sealing of the medium bin 6 and the heat conduction hole 4 is ensured to be good.

Step five: and the medium bin 6 and the heat conduction hole 4 are vacuumized and filled with a medium. The process of vacuumizing and injecting liquid into the medium bin 6 and the heat conducting hole 4 through the exhaust pipe is carried out by utilizing vacuumizing and injecting equipment, after the vacuumizing process meets the requirement of corresponding vacuum degree, a proper amount of heat conducting medium is injected according to the volume calculation of the medium bin 6 and the heat conducting hole 4, secondary degassing is carried out after injection and encapsulation, incompressible gas is removed as far as possible, the temperature uniformity of the hollow composite bottom pot is improved, and then the exhaust pipe for vacuumizing and injecting liquid is welded and sealed. The heat-conducting medium is a liquid medium;

step six: the surfaces of the outer pot body 3, the inner pot body 2 and the pot body 1 are cleaned, polished, coated and the like;

step seven: and assembling and inspecting the product.

If the hollow composite bottom pot made of the aluminum profiles is used on the induction cooker, the metal plate with magnetic conductivity is fixed on the outer pot body 3 through the punching machine, the metal plate with magnetic conductivity and the outer pot body 3 are fixed into a whole, and the hollow composite bottom pot with the magnetic conductivity metal plate can be used on the induction cooker.

The metal casting pot is characterized in that molten liquid metal is cast into a pot body through a designed and manufactured pot body die, and the liquid metal is cooled and demoulded to form a solid metal pot body. The preferable die-casting processing is characterized in that high pressure is applied to molten metal by utilizing an inner cavity of a die, and a cold chamber die-casting machine or a hot chamber die-casting machine is required to be used according to different die-casting types; the metal is aluminum, stainless steel, iron, titanium alloy and the like which are suitable for being used as metal materials of the cookware.

As a preferred preparation method of the composite pan, the scheme provides a hollow composite pan bottom and a preparation method of the composite pan, metal casting processing is adopted, and the preparation method comprises the following steps:

the method comprises the following steps: designing and manufacturing a corresponding pot body mould according to the section of the pot body;

step two: liquid metal is cast and molded through a designed and manufactured pot body mold, and the liquid metal is cooled and demolded to form a pot body, namely, the pot body 1, the outer pot body 3, the inner pot body 2, the supporting body 5, the heat conducting hole 4 and the medium bin 6 are integrally cast and molded; the leak detection test is carried out on the joint of the outer pot body 3 and the inner pot body 2, so that the medium bin 6 and the heat conduction hole 4 are well sealed;

thirdly, performing a vacuumizing liquid injection process on the medium bin 6 and the heat conduction hole 4 through an exhaust pipe by using vacuumizing liquid injection equipment, injecting a proper amount of heat conduction medium according to the volume calculation of the medium bin 6 and the heat conduction hole 4, and then welding and sealing the exhaust pipe;

when filling the low-melting-point solid medium: firstly, heating a hollow composite pot bottom and melting a solid medium with a low melting point, wherein the temperature of the heated hollow composite pot bottom needs to exceed the melting point temperature of the solid medium, and the medium which is melted into a liquid state is filled in a medium bin 6 and a heat conduction hole 4 through an exhaust pipe; the heated high-temperature hollow composite pot bottom ensures that the liquid solid medium cannot be cooled and solidified in the filling process.

Preferably, the heat transfer medium is a molten salt of a low melting point solid medium. The molten salt has the characteristics of high working temperature, high-temperature heat transfer of about 600 ℃, normal pressure at high temperature, no reaction with contacted pipe fittings and other materials, no damage to the environment, high specific heat, high heat transfer capacity, low viscosity, easy treatment, low price and safety, so the molten salt is well applied.

And step four, the surfaces of the outer pot body 3, the inner pot body 2 and the pot body 1 are cleaned, polished, coated and the like.

And step five, assembling and inspecting the product.

The above description is only for the specific embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the inventive concept, and all the changes or substitutions should be covered within the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the appended claims.

Claims (8)

1. A hollow composite pot bottom is characterized by comprising: the pot comprises an outer pot body (3), an inner pot body (2), a heat-conducting medium and a support body (5); the outer pot body (3) is connected with the bottom of the inner pot body (2) through a support body (5), and the outer pot body (3), the inner pot body (2) and the support body (5) are integrally processed and formed;

the cavity that the junction of the outer pot body (3) and the inner pot body (2) does not have the support body (5) is the medium bin (6), a plurality of heat conduction holes (4) are arranged on the support body (5), the heat conduction holes (4) are communicated with the medium bin (6) to form a sealed cavity, and a heat conduction medium is injected into the sealed cavity.

2. The hollow composite pan bottom according to claim 1, characterized in that: the outer pot body (3), the inner pot body (2) and the supporting body (5) are integrally processed and formed by aluminum profiles or are integrally processed and formed by metal casting.

3. The hollow composite pan bottom according to claim 1, characterized in that: the longitudinal section of the heat conduction hole (4) is circular, oval, triangular or trapezoidal.

4. The hollow composite pot bottom according to any one of claims 1 to 3, characterized in that: a liquid absorption core structure is arranged in the heat conduction hole (4); the liquid absorption core structure is a hot-melt slag structure, a groove structure or a multiple metal mesh structure.

5. The hollow composite pan bottom according to claim 4, characterized in that: the heat-conducting medium is a liquid medium, and liquid-gas phase change heat transfer soaking is performed in the sealed cavity.

6. The hollow composite pan bottom according to claim 4, characterized in that: the heat conducting medium is a low-melting-point solid medium, and heat transfer soaking of solid-liquid phase change is performed in the sealed cavity.

7. A composite pan, characterized in that: the hollow composite pot bottom comprises the hollow composite pot bottom of any one of claims 1 to 3.

8. The composite pan of claim 7, wherein: the pot also comprises a pot body (1), and the pot body (1) and the inner pot body (2) are integrally formed.

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