CN203980973U - Copper aluminum composite metal heat pipe - Google Patents

Abstract

A kind of copper aluminum composite metal heat pipe, formed by sealing solder joint (1), liquid injection pipe cold welding section (2), liquid injection pipe (3), outer aluminum pipe (4), internal layer copper pipe (5), working medium cavity (6), working medium (7), plug (9), solder joint (10), wherein shell is the compound outer aluminum pipe of internal layer copper pipe (5) (4), internal layer copper pipe (5) is red copper or oxygen-free copper, and outer aluminum pipe (4) is aluminum or aluminum alloy.This copper aluminum composite metal heat pipe has reduced the cost of metal heat pipe shell, has also ensured the needed intensity of metal heat pipe and reliability simultaneously.

Description

Copper aluminum composite metal heat pipe

Technical field

The utility model relates to a kind of metal heat pipe and processing method thereof, particularly adopts the copper aluminum composite pipes of steel structure in outer aluminium as metal heat pipe and the processing method thereof of Can, belongs to solar energy heat utilization field and radiator field.

Background technology

Solar energy utilization technique has developed more than 20 years, without technologically all having obtained development fast with market.As the thermal-collecting tube technology of solar thermal utilization core technology also among continuous development, by the all-glass vacuum thermal-collecting tube of early stage double-layer coaxial to all-glass heat pipe vacuum collector tube future development, realize and in pipe, had water, to anhydrous phase-change heat-exchange future development in pipe.Along with the development of thermal-collecting tube heat transfer technology, metal heat pipe technology also certain applications in thermal-collecting tube, comprise double-layer coaxial complete glass vacuum sun thermal-collecting tube interpolation metal heat-exchange aluminium fin and metallic copper heat pipe, or employing glass metal seal technology, adopt the built-in heat absorbing fins of cover glass tube and metal heat pipe to carry out thermal-arrest and heat exchange, between metal heat pipe and cover glass tube, adopt metal flange pressure sealing technology, realize the sealing-in sealing of metal and glass.Heat transfer rate is fast for such thermal-collecting tube, and collecting efficiency is high, and system security reliability is high.

But no matter be any technology, as the metal heat pipe of heat exchange element, generally all adopt red copper or oxygen-free copper as shell.Its principal element is processing, the welding and better with the intermiscibility of working medium of copper.But because its cost is higher, only use in some so-called high-end occasions at present.High cost has seriously limited the use of metal heat pipe, has hindered the development of thermal-collecting tube technology.

Owing to adopting red copper or oxygen-free copper ripe as the technology of heat pipe package, and be applied in solar energy heating Manifold technology.Part producer is in order to reduce costs, and by metal heat pipe shell thickness reduction, even the shell wall thickness of part heat pipe has dropped to below 0.5mm, and the security, reliability of heat pipe, the performance such as freeze proof, withstand voltage, anti-oxidant are all significantly declined.The utility model is still using red copper or oxygen-free copper as Can material, with relevant issues such as the welding of technical solution heat pipe, working medium intermiscibility, vacuum.Owing to affecting the intermiscibility problem that the principal element of metal heat pipe performance is metal heat pipe inwall and working medium, and Welding Problems.

Summary of the invention

The utility model adopts the shell of copper aluminum composite metal pipe as metal heat pipe, general outer aluminium interior steel structure, i.e. the aluminium copper-clad structure of adopting.Heat pipe package inner surface adopts red copper or oxygen-free copper material, and wall thickness is 0.1～0.3mm.Red copper or the compound fine aluminium of oxygen-free copper outer surface or alloy aluminum, thickness is generally 0.2～0.8mm.Shell gross thickness is generally 0.5～1.0mm.Shell diameter is generally 4mm～20mm.Heat pipe length is generally 400mm～2500mm.

The part such as main body, tail end that heat pipe structure is made up of liquid injection pipe, copper aluminum composite pipes and cavity forms.Wherein the plug of liquid injection pipe, tail end is identical with the material of heat pipe inner layer metal copper, so that ensure the isolated of working medium and outside aluminum pipe or environment.

Owing to adopting copper aluminum composite metal as shell, therefore, the processing method of conventional copper heat pipe cannot be applicable to the processing of copper aluminium composite heat pipe completely, and its main cause comprises two aspects:

1) because material is harder, and be composition metal material, therefore adopt reducing or pipe end forming technique to realize the moulding at heat pipe two ends;

2) the material cold welding sealing that cannot rely on cold deformation to realize liquid injection port section really up to the mark, stability of the welding quality is bad.

Pipe end welding adopts plug to be inserted into copper aluminium composite heat pipe bottom, and the plug that adopts is red copper or oxygen-free copper.Adopt argon arc welding or soldering processes, the welding that realizes plug and shell interior metal copper is merged.

Liquid injection port adopts soft state red copper.Liquid injection pipe external diameter is identical with shell internal diameter.Liquid injection pipe is inserted into 10～20mm in shell, then adopts argon arc welding or soldering, realize the welding of liquid injection pipe.Because liquid injection pipe adopts soft state copper tube, be convenient to heat pipe and complete cold welding after fluid injection and separate, thereby effectively solved copper aluminum composite pipes shell and cannot be processed into the problem of heat pipe.

In metal heat pipe shell adopts outer aluminium, when steel structure, because inner surface remains red copper or oxygen-free copper, many characteristics of original independent red coppers such as the intermiscibility of material and working medium, reliability, weldability or oxygen-free copper heat pipe do not have change.And adopt after the compound certain thickness aluminium of outer surface or alloy aluminum, not only totally reduce the cost of metal heat pipe shell, also ensure the needed intensity of metal heat pipe, reliability simultaneously.Combination property and virgin metal heat pipe are substantially suitable.

Because copper aluminum composite metal heat pipe package outer surface is fine aluminium or alloy aluminum, and aluminium easily forms fine and close aluminum oxide coating layer in surface at normal temperatures, prevent shell interior metal to be further oxidized, especially under hot conditions, so just solved the problem of high temperature shell oxidation, melanism.And conventional copper heat pipe easily produces epidermis oxidation under hot conditions, gradually to internal oxidation, melanism, finally make shell oxidation penetrate, lose properties of hot pipe.And under non-normal use condition, the air drying temperature of thermal-collecting tube can reach more than 300 DEG C, very easily cause the problem of oxidation of Cu metal tubes shell.And the outer copper aluminum composite metal shell that has been coated metallic aluminium because the existence of surface compact aluminium oxide ORC, has thoroughly solved the problem of Yin Gaowen air drying shell oxidation deactivation.

Owing to adopting copper aluminum compound structure; ensureing under the condition of equal profit; the cost of metal heat pipe and market price can decline more than 30%; marketing prospect and can acceptance increasing considerably; popularization and application, in solar water heating system, therefore can greatly promote industrialization and the scale of solar energy heat collection pipe more.

Brief description of the drawings

Fig. 1 is heat pipe structure profilograph of the present utility model.

Detailed description of the invention

Below in conjunction with accompanying drawing, the utility model is done further and described in detail.

As shown in Figure 1, copper aluminium composite heat pipe is mainly made up of parts such as sealing solder joint 1, liquid injection pipe cold welding section 2, liquid injection pipe 3, outer aluminum pipe 4, internal layer copper pipe 5, working medium cavity 6, working medium 7, plug 9, solder joints 10.

Adopt the shell of copper aluminum composite metal pipe as metal heat pipe, general outer aluminium interior steel structure, i.e. the aluminium copper-clad structure of adopting.Heat pipe package inner surface adopts red copper or oxygen-free copper material, and wall thickness is 0.1～0.3mm.Red copper or the compound fine aluminium of oxygen-free copper outer surface or alloy aluminum, thickness is generally 0.2～0.8mm.Shell gross thickness is generally 0.5～1.0mm.Shell diameter is generally 4mm～20mm.Heat pipe length is generally 400mm～2500mm.

Heat pipe package one end is liquid injection port, and liquid injection port adopts the soft state red copper identical with shell internal diameter, and liquid injection pipe 3 is inserted into 10～20mm in shell, so that cold welding separates.9 sealings that adopt red copper plug to realize pipe end of other end plug.Solve like this problem that copper aluminum composite pipes is difficult to moulding and cold welding.Working medium 7 is distilled water or is one or more inorganic salt solutions.Working medium 7 account for working medium cavity 6 volume 1%～20%.

Below in conjunction with the accompanying drawings and embodiments the utility model is schematically described, this description does not have restricted, and shown in the drawings is also a kind of embodiment.It should be appreciated by those skilled in the art, under the technology enlightenment of the utility model scheme, other people also may make design similar to the utility model or equivalence.Only it is pointed out that otherwise depart from design aim of the present utility model, all apparent changes and similar or equivalent design, within being all included in protection domain of the present utility model.

Claims (9)

1. a copper aluminum composite metal heat pipe, formed by sealing solder joint (1), liquid injection pipe cold welding section (2), liquid injection pipe (3), outer aluminum pipe (4), internal layer copper pipe (5), working medium cavity (6), working medium (7), plug (8), solder joint (9), wherein shell is the compound outer aluminum pipe of internal layer copper pipe (5) (4), internal layer copper pipe (5) is red copper or oxygen-free copper, and outer aluminum pipe (4) is aluminum or aluminum alloy.

2. heat pipe according to claim 1, is characterized in that, described internal layer copper pipe (5) wall thickness is 0.1～0.3mm.

3. heat pipe according to claim 1, is characterized in that, described outer aluminum pipe (4) thickness is 0.2～0.8mm.

4. heat pipe according to claim 1, is characterized in that, described shell gross thickness is 0.5～1.0mm, and shell diameter is 4mm～20mm.

5. heat pipe according to claim 1, is characterized in that, described heat pipe length is 400mm～2500mm.

6. heat pipe according to claim 1, is characterized in that, described plug (8) is red copper.

7. heat pipe according to claim 1, is characterized in that, described liquid injection pipe (3) is soft state red copper.

8. heat pipe according to claim 1, is characterized in that, described liquid injection pipe (3) is inserted into 10～20mm in shell.

9. heat pipe according to claim 1, is characterized in that, described working medium (7) account for working medium cavity (6) volume 1%～20%.