CN102538544B - Compound heat pipe, method of manufacturing the same, heat exchanger and heat exchanger system using the same - Google Patents

Abstract

The compound heat pipe according to the present invention may overcome physical limits, which a single metal pipe might have, by integrally joining different metal pipes having different physical properties, forming ridges on an inner surface thereof the pipe and protrusions on an outer surface thereof and may first increase heat transfer capability by increasing the heat transfer area between the pipe and fluid. Further, the compound heat pipe according to the present invention may secondly increase the heat transfer capability by setting the noncontact rate to be 30% or less so that the heat transfer rate of the compound heat pipe in the radial direction may be optimized.

Description

Complex heat transfer pipe and manufacture method, heat exchanger and heat-exchange system

Technical field

The present invention relates to a kind of heat-transfer pipe being used in heat exchanger, particularly a kind of complex heat transfer pipe be composited by the metal material with mutually different physical characteristics.

Background technology

Usually, industrial equipment, changes in temperature equipment, various mechanical devices etc. possess the heat-exchange system for performing heat exchange action.Heat-transfer pipe is widely used as heat exchange metal tube in this heat-exchange system.Such as, utilizing the liquid dissolves degree of refrigerant vapour with in temperature, pressure and the absorber of the Absorption Refrigerator of different principles and evaporimeter, heat-transfer pipe is used in order to the heat exchange between cooling water and absorbing liquid and between cold water and cold-producing medium.And, in the evaporimeter of turborefrigerator, also in order to cold water and cold-producing medium (R134a) heat exchange and use heat-transfer pipe.

Early stage heat-transfer pipe is only made up of single metal (such as copper or copper alloy), in order to improve heat exchange performance, forms projection or metal fin etc. at the exterior face of heat-transfer pipe.Such as, the various scheme of the heat exchange performance for improving heat-transfer pipe be made up of single metal is described in No. 0518695th, Korean granted patent, No. 0707682nd, Korean granted patent, No. 2007-63073rd, KR published patent, No. 2009-98526th, KR published patent and No. 2010-21215th, KR published patent etc.

Representational method is, forms thermofin or projection at the exterior face of heat-transfer pipe, and forms ridge projections or the thread-shaped projection of coil-shape in inside face.

But, when like this only forming heat-transfer pipe by copper or copper alloy, the inherent characteristic had due to copper or copper alloy itself and produce various problem.Although copper or copper alloy have remarkable corrosion resistance, outstanding heat conductivity and various outstanding mechanical property, have owing to not being rich in natural resources, thus price is high, and due to proportion high, the thus shortcoming of Heavy Weight.And aluminum or aluminum alloy has with low cost because of aboundresources, and the advantage of light weight, therefore, aluminum or aluminum alloy rises to the first alternative materials into copper.But the grade of the intensity of aluminum or aluminum alloy, corrosion resistance, heat conductivity and other inferior mechanical properties is all lower than copper.

Therefore, recently there is the composite metal pipe being simultaneously suitable for this copper and aluminium.Such as, the inner metal layer that No. 2009-23349th, KR published patent (below referred to as patent document 1) proposes a kind of pipe is made up of copper, copper/aluminium composite pipe that the outer metal layer of pipe is made up of aluminium.

And, in order to improve the heat transfer property of the multiple tube as above-mentioned patent document 1, No. 2000-146304th, patent document 2(Japanese Laid-Open Patent) a kind of surface in outer metal layer of publicity forms the heat-transfer pipe of the protruding finned tube form of multiple fin (fin), No. 6-198376, patent document 3(Japanese Unexamined Patent Publication) a kind of outer peripheral face in outer metal layer of publicity is integrally formed helical form fin, and this helical form fin forms with spiral form the heat-transfer pipe of many slits.

But with regard to above-mentioned patent document 2 and patent document 3, owing to only forming the thermofin for promoting heat transfer property on the surface of the outer metal layer of complex heat transfer pipe, therefore the expansion of heat transfer property is limited.

Therefore, the ridge projections (ridge) needing to carry out structure change, heat transfer area can be expanded as the medial surface at heat-transfer pipe is also formed, increase flow resistance to fluid, obtain warm current effect.

So, if not only at the exterior face of complex heat transfer pipe, also form ridge projections in inside face, then produce multiple gap (gap) 14 at inner metal layer 11 and the boundary face 13 of outer metal layer 12 as shown in Figure 1.The existence in this gap causes the heat-conductive characteristic between the fluid in the internal flow of heat-transfer pipe and the fluid of the flows outside at heat-transfer pipe to decline.Therefore, the size controlling the gap that the inner metal layer of complex heat transfer pipe and the boundary face of outer metal layer exist is extremely important for the heat transfer property improving complex heat transfer pipe.The present inventor, from such technical background, is studied the correlation between the size (noncontact rate) in the gap existed at complex heat transfer pipe and the pyroconductivity of complex heat transfer pipe.

Result of study is learnt, the pyroconductivity of complex heat transfer pipe and the boundary face noncontact rate of complex heat transfer pipe exist inversely prroportional relationship, and pyroconductivity is sharply deteriorated near specific noncontact rate.

Summary of the invention

The present invention derives from such technology motivation and background, first technical task of the present invention is, form by the complex heat transfer pipe of two two or more heavy metal overlaps, and not only change the exterior face of complex heat transfer pipe, also change the surface texture of inside face to realize the maximization of heat transfer property.

And the second technical task of the present invention is, the noncontact rate regulating the boundary face connected with outer metal layer at the inner metal layer of complex heat transfer pipe to exist is to realize the pyroconductivity optimization of the radial direction of complex heat transfer pipe.

Other objects of the present invention and advantage will be described below, and can be understood by embodiments of the invention.And objects and advantages of the present invention can be realized by the combination of the structure described in right and structure.

In order to reach above-mentioned purpose, of the present inventionly providing a kind of complex heat transfer pipe, it is characterized in that,

Comprise: the first body, it is made up of the first metal material, multiple projection is formed at its outer surface, second body, it inserts the inner side being bonded on above-mentioned first body, and be made up of second metal material with the physical characteristic different from above-mentioned first metal material, within it surface is formed with multiple ridge projections, and boundary face, it to be connected with above-mentioned second body by above-mentioned first body and forms;

Noncontact rate satisfied less than 30% that defined by following mathematical expression, that cause at the gap that above-mentioned boundary face exists (gap),

Here, L represents the arc length summation in the gap existed in the boundary face of complex heat transfer pipe, and r' represents the radius of boundary face.

At this moment, above-mentioned first metal material is the alloy of any one or they in Al and Cu, and above-mentioned second metal material is alloy or the stainless steel of any one or they selected in Cu, Ti.

According to the present invention, owing to inserting the double metal tube engaging and there is mutually different physical characteristic, therefore, it is possible to overcome the limitation of the physical characteristic that single metal has.

And, not only form protuberance at the exterior face of complex heat transfer pipe, also form ridge projections in inside face, thus the area that connects with fluid of the inside and outside being increased in complex heat transfer pipe and fluid resistance are to realize the maximization of heat transfer property.

And, the noncontact rate that the gap that the boundary face that the outer metal layer suitably controlling complex heat transfer pipe connects with inner metal layer produces causes, thus realize the optimization of radial (radial) pyroconductivity of complex heat transfer pipe.

Therefore, complex heat transfer pipe according to the present invention is with only compared with the single heat-transfer pipe that copper or copper alloy are formed, there is the low and advantage of light weight of cost, simultaneously with only compared with the single heat-transfer pipe that aluminum or aluminum alloy is formed, there is outstanding corrosion resistance and outstanding conductibility.And compared with existing complex heat transfer pipe, the heat transfer property of complex heat transfer pipe of the present invention is preeminent.

accompanying drawing explanation

The accompanying drawing of this description illustrates the preferred embodiments of the present invention, together play a part to contribute to understanding technological thought of the present invention further with detailed description of the present invention described below, therefore the present invention can not be interpreted as only being defined in the item recorded in these accompanying drawings.

Fig. 1 is the cross-sectional view that the complex heat transfer pipe represented is amplified in the multiple gaps boundary face between outer metal layer and inner metal layer existed.

Fig. 2 is the longitudinal section of complex heat transfer pipe of the present invention.

Fig. 3 is the enlarged drawing of the boundary face of complex heat transfer pipe.

Fig. 4 is the figure of the noncontact rate for illustration of complex heat transfer pipe.

Fig. 5 is the figure of the average arc length summation for being calculated gap by complex heat transfer pipe sample.

Fig. 6 is the chart of the relation of display noncontact rate and pyroconductivity.

Detailed description of the invention

Below, the preferred embodiments of the present invention are described in detail with reference to the accompanying drawings.Before this, the term used in this specification and claims scope or word can not be defined in be explained or dictionary explanation usually, but based on inventor in order to the invention of oneself being described with most preferred method and suitably can defining the principle of the concept of term, implication and the concept of technological thought according to the invention to be interpreted as.

Therefore, embodiment described in this manual and a structure illustrated in the accompanying drawings only most preferred embodiment of the present invention, do not represent all technological thoughts of the present invention, therefore should be understood to propose the moment in the application and also may exist and can substitute of the present invention variously equivalent to substitute and variation.

First, before explanation structure of the present invention, the multiple new terminologies occurred in this description are defined.

" the complex heat transfer pipe " that occur in this manual represents the multiple tube formed by plural metal tube joint.At this moment, the metal material be bonded with each other is selected from can in the metal material of complementary physical vulnerabilities each other.

" noncontact rate " represents the degree causing outer metal layer and inner metal layer heat to isolate because the boundary face connected with inner metal layer in the outer metal layer of complex heat transfer pipe exists gap, and it is defined by following mathematical expression 1.

Mathematical expression 1

Here, above-mentioned L represents the arc length summation in the gap existed in boundary face, and r' represents the radius of boundary face.

" heat exchanger " is used with following implication: " heat exchanger " is the general designation adopting complex heat transfer pipe and heat trnasfer between the fluid by the internal flow via complex heat transfer pipe and from the fluid to the flows outside of complex heat transfer pipe to realize all devices of heat exchange.The example of heat exchanger of the present invention, can enumerate the absorber of Absorption Refrigerator or the example such as evaporimeter, heat-pump-type heat exchanger, fin tube type heat exchanger of evaporimeter or turborefrigerator.

And heat-exchange system is the system using above-mentioned heat exchanger to perform heat exchange action in industrial equipment, changes in temperature equipment, various mechanical devices etc., typically, can enumerate the example such as Absorption Refrigerator or turborefrigerator.

And " body " that use in this manual refers to carry out the pipe of Physical Processing by inner space transporting fluid.

Fig. 2 is the longitudinal section of complex heat transfer pipe of the present invention.

With reference to Fig. 2, complex heat transfer pipe 20 of the present invention is double pipes that the first body 22 and the second body 21 combine.Above-mentioned second body 21 inserts the inner side being bonded on above-mentioned first body 22, forms boundary face 23 in the place that first and second body 22,21 connects.Ideally, first and second body 22,21 above-mentioned should combine closely to avoid producing gap in above-mentioned boundary face 23 mutually.But, the operation of carrying out physical engagement after individually manufacturing the first body 22 and the second body 21 eliminates the gap produced in boundary face 23 completely and is not easy.

Above-mentioned first body 22 is made up of the double metal material with mutually different physical characteristic with above-mentioned second body 21.The metal material forming above-mentioned first body 22 is made up of any one being selected from Al or its alloy, Cu or its alloy and their alloy, and the metal material forming above-mentioned second body 21 is made up of any one in Cu or its alloy, Ti or its alloy, stainless steel.

Be formed for increasing the surface area contacted multiple projections 25 with fluid at the lateral surface of above-mentioned first body 22.Therefore, the rigidity (Young's Modulus: Young's modulus) that the first body 22 has 60 ~ 130Gpa is preferably, to form projection 25.If the rigidity of the first body 22 is less than 60Gpa, then need to form predetermined angular when generating outside fin at fin and tube surface, to promote heat transfer property, but this is difficult to carry out.And, if the rigidity of above-mentioned first body 22 is greater than 130Gpa, be then difficult to form projection smoothly.

The concrete operation that the above-mentioned lateral surface at the first body 22 forms projection with reference to No. 2007-63073rd, KR published patent, No. 0518695th, Korean granted patent, No. 707682nd, Korean granted patent and No. 2009-98526th, KR published patent etc., therefore can be omitted.

And, be formed with the surface area contacted multiple ridge projections (ridge) 24 for increasing the fluid with internal flow at the medial surface of above-mentioned second body 21.Therefore, the rigidity (Young's Modulus) that the second body 21 has 100 ~ 200Gpa is preferably, to form ridge projections 24.If the rigidity of the second body 21 is less than 100Gpa, be then difficult to produce required form because material crosses soft, if be greater than 200Gpa, be then difficult to form ridge projections smoothly.

The concrete operation forming ridge projections at the medial surface of above-mentioned second body 21 with reference to No. 2007-63073rd, KR published patent, No. 0518695th, Korean granted patent, No. 707682nd, Korean granted patent and No. 2009-98526th, KR published patent etc., therefore can be omitted.

Like this, projection and ridge projections is formed respectively by the lateral surface of the first body 22 at complex heat transfer pipe 20 and the medial surface of the second body 21, first and second body 22, heat transfer area between 21 and fluid are expanded, thus compared with the existing complex heat transfer pipe of publicity in above-mentioned patent document 1 to patent document 3, the heat that significantly can increase heat-transfer pipe passes on efficiency.

And with reference to Fig. 2, the complex heat transfer pipe 20 the present invention formed as engaged by mutually different double metal tubes produces multiple gap 30 in the boundary face 23 that double metal tube engages.

The enlarged drawing of 1000 times is amplified in above-mentioned gap 30 by Fig. 3 by microscope.With reference to Fig. 3, this gap 30 is the indefinite form slits extended along the circumference of boundary face 23, and the arc length in gap is l', and straight length is l, and the width of radial direction is d.Above-mentioned arc length l' is almost identical with above-mentioned straight length l.And the width d of above-mentioned radial direction is about 1 ~ 10 μm, compared to above-mentioned arc length l' or the little degree to ignoring of above-mentioned straight length l.

As mentioned above, gap 30 due to the boundary face 23 of complex heat transfer pipe carries out the gap that physics in the process of expander joint produces the second body 21 being inserted into the first body 22, therefore has the indefinite form shape of slit of the very narrow length of the width of radial direction.Therefore, the width d of the radial direction in above-mentioned gap 30 is little of ignoring the impact of passing on performance to cause on the heat of the wide radial direction of complex heat transfer pipe.On the contrary, the arc length l' in gap 30, namely the heat in straight length l pair radius direction passes on performance to make a big impact.

Therefore, the present inventor passes on performance (i.e. pyroconductivity) and the relation between the arc length in the gap that the boundary face 23 of complex heat transfer pipe exists to do the modeling of following mathematical expression 1 to the heat of the radial direction of complex heat transfer pipe.

First, the existence in the gap to the boundary face that the pyroconductivity of complex heat transfer pipe impacts is described by noncontact rate.Above-mentioned noncontact rate represents that the first body 22 and the second body 21 do not have physics and/or thermal bonding and the degree of isolating.Therefore, above-mentioned noncontact rate height represents that the first body 22 and the second body 21 heat isolate very large state, and the pyroconductivity of radial direction declines in the nature of things.

With reference to Fig. 4, be that the boundary face 23 of the complex heat transfer pipe 20 of r' exists multiple gap G at radius ₁~ G ₆, the straight length corresponding with the arc length l' in above-mentioned multiple gap is defined as l respectively ₁~ l ₆.At this moment, noncontact rate (%) meets following mathematical expression 1.

(mathematical expression 1)

Here, L represents the arc length summation in the gap existed in the boundary face of complex heat transfer pipe, and r' represents the radius of boundary face.

If always co-exist in 6 gaps in the boundary face of complex heat transfer pipe as shown in Figure 4, then the L of above-mentioned mathematical expression 1 meets following formula.

L=l ₁+l ₂+l ₃+l ₄+l ₅+l ₆

At this moment, because the arc length l' in gap is identical with the straight length l in gap, therefore do not distinguished.

It is true as follows that the present inventor obtains cicada: the noncontact rate (%) defined by above-mentioned mathematical expression 1 is roughly in inversely prroportional relationship with the radial pyroconductivity of complex heat transfer pipe, and pyroconductivity occurs sharply to change in specific noncontact rate.That is, obtain cicada pyroconductivity, before and after above-mentioned noncontact rate (%) 30%, the fact jumpy occurs.

Therefore, the feature of complex heat transfer pipe of the present invention is, its noncontact rate is below 30%.If the noncontact rate of complex heat transfer pipe is greater than 30%, then because pyroconductivity becomes 7000W/m ²therefore below K is not preferred.And although the lower limit of noncontact rate is not particularly limited, owing to not getting negative value, therefore noncontact rate is 0 ideal.

Now, the example as complex heat transfer pipe describes the double metal tube by two metal bond with mutually different physical characteristic, but the present invention might not be defined in above-mentioned example.Therefore, in the scope not damaging basic fundamental thought of the present invention, triple or quadruple metal tube etc. also can become one of embodiment of complex heat transfer pipe of the present invention.

Next, the manufacture method with the complex heat transfer pipe of the present invention of said structure will be described.

First, the first body 22 first metal tube and the second body 21 second metal tube is prepared.Then, the second metal tube is inserted into the inner space of the first metal tube.Heat under the state that the second metal tube is inserted in the first metal tube, form ductility state, by manufacturing the naked pipe (Bare Tube) of the external diameter with required form via the impression flow of the mould with specified diameter.When manufacturing above-mentioned naked pipe, determine size and the level in the gap existed in boundary face.Put into the chipware with spiral (helix) form in the inside of the naked pipe so manufactured, under the state that the outside of naked pipe is given for the formation of three roller location of projection, while rotating naked pipe with fixing speed, draw naked pipe.Thus, generate the spiral helicine ridge projections of the form identical with the shape of above-mentioned chipware in the inside face of naked pipe, form the shape of multiple shape for lugs at the exterior face of above-mentioned naked pipe.So, the complex heat transfer pipe be made up of the first body 22 and the second body is as shown in Figure 2 completed.

Below, the correlation between the noncontact rate (%) of complex heat transfer pipe and pyroconductivity will be described by experiment.

1. the manufacture of complex heat transfer pipe sample

Prepare external diameter and be 19.05mm and thickness is the copper pipe of 0.5mm and external diameter is 21.5mm and thickness is the aluminum pipe of 1mm.Ready copper pipe is inserted and penetrates into after in aluminum pipe, manufacture naked pipe by expander operation.Medial surface ridge projections formation process and lateral surface projection formation process are performed simultaneously to complete multiple complex heat transfer pipe sample to the naked pipe so manufactured.At this moment, plus-pressure time by changing expander operation or the quantity in gap and size that regulate the plus-pressure etc. when ridge projections or projection formation process to regulate to be formed in boundary face.Manufacture 11 so regulate the quantity in gaps and size after complex heat transfer pipe sample after, respectively to its mensuration noncontact rate and pyroconductivity.

2. the calculating of noncontact rate (%)

As shown in Figure 5, for the complex heat transfer pipe sample manufactured, after cutting central part and two terminal parts respectively, with SEM(Scanning Electron Microscope, SEM) the observation boundary face of cutting to be to measure the straight length in all gaps (gap).Whole for the straight length in the gap so determined phase Calais is calculated the arc length summation L in the gap of central part and two terminal parts ₁, L ₂, L ₃.Utilize the arc length summation in the gap of central part and two terminal parts so calculated to calculate mean value L _avg, substituted into mathematical expression 1 to obtain noncontact rate (%).At this moment, in order to measure more accurately, the cutting part at more than three places (central part and two terminal parts) also can be got.

3. the mensuration of pyroconductivity

Pyroconductivity is with being defined as U(Overall Heat-transfer coefficient) overall heat-transfer coefficient calculate.Utilize the heat exchanger experimental provision that can cause the refrigerant environment identical with refrigeration machine for this reason.Determine carry out the cold-producing medium of heat exchange in heat exchanger experimental provision inside saturation temperature, carry out the gateway temperature of the water of heat exchange with cold-producing medium, calculate heat Q based on this.By the surface area A of the heat that will so calculate, heat-transfer pipe and with the log-mean temperature difference △ T of following formula (1) _lMTDobtain total heat in substitution formula (2) and pass on coefficient U.

${\mathrm{\ΔT}}_{\mathrm{LMTD}}=\frac{{\mathrm{\ΔT}}_1-{\mathrm{\ΔT}}_2}{\ln ({\mathrm{\ΔT}}_1/T_2)}---\left(1\right)$

$U=\frac{Q}{A{\mathrm{\ΔT}}_{\mathrm{LMTD}}}---\left(2\right)$

Here, Q represents that cold-producing medium and water carry out the heat (kW) of mutual heat exchange, △ T ₁represent cooling water inlet temperature (condenser pipe) or cold water inlet temperature (evaporation tube), △ T ₂represent cooling water outlet temperature (condenser pipe) or cold water outlet temperature (evaporation tube), △ T _lMTDrepresent log-mean temperature difference (LMTD:Log Mean Temperature Difference), A represents the surface area of heat-transfer pipe.

4. the correlation of noncontact rate and pyroconductivity

The noncontact rate of 11 the complex heat transfer pipe samples calculated according to the method described above and the arrangement result of pyroconductivity are as following table 1.

(table 1)

Noncontact rate (%)	Pyroconductivity (W/m 2k）
		0.0	7923
5.0	7815
		10.4	7753
14.8	7503
		20.1	7214
25.3	7167
		30.3	6926
35.2	5279
		40.7	3561
44.9	2938
		51.6	1750

Based on the result of above-mentioned table 1, graphically illustrate the correlation of noncontact rate (%) and pyroconductivity as Fig. 6.

With reference to Fig. 6, when the noncontact rate of complex heat transfer pipe is 0, demonstrate the pyroconductivity of best radiation direction.But along with the increase of the noncontact rate of complex heat transfer pipe, pyroconductivity is with slope S ₁reduce gradually, reach the moment of 30% in noncontact rate (%), pyroconductivity is with slope S ₂sharply reduce.That is, can confirm that the place that noncontact rate (%) reaches 30% is that flex point is interval.

Therefore, it is possible to confirm, when manufacturing complex heat transfer pipe, if noncontact rate (%) is designed to less than 30% by the pressure etc. when plus-pressure when suitably regulating the thickness of the first body and the second body, the first body and the second body expander, ridge projections are formed or projection is formed, the optimization of the pyroconductivity of complex heat transfer pipe just can be realized.

The noncontact rate of compound heat transfer tube can be designed to 5.0% ~ 25.3%.

The evaporimeter etc. of absorber or evaporimeter or turborefrigerator that compound heat transfer tube of the present invention can be applicable to Absorption Refrigerator utilizes all heat exchangers of heat-transfer pipe.And, heat exchanger of the present invention can be used to build heat-exchange system at industrial equipment, changes in temperature equipment, various mechanical devices etc.Typically, the example such as Absorption Refrigerator or turborefrigerator can be enumerated.

So, after the double metal tube with mutually different physical characteristic engages and realizes integration by complex heat transfer pipe of the present invention, ridge projections is formed at medial surface, projection is formed at lateral surface, thus overcome the physical constraints that single metal tube has, and increase and promote heat transfer property with the heat transfer area of fluid.And the noncontact rate of setting complex heat transfer pipe is less than 30% optimization realizing the radial pyroconductivity of complex heat transfer pipe, thus promotes the heat transfer property of complex heat transfer pipe further.

As mentioned above, by limit embodiment and accompanying drawing describe the present invention, but the present invention is not limited thereto, general technical staff of the technical field of the invention can carry out various correction and distortion in the equivalency range of technological thought of the present invention and right.

Claims (15)

1. a complex heat transfer pipe, is characterized in that,

Comprise:

First body, it is made up of the first metal material, is formed with more than one projection at its outer surface,

Second body, it is bonded on the inner side of above-mentioned first body, is made up of, is formed with more than one ridge projections at the inner surface of this second body second metal material with the physical characteristic different from above-mentioned first metal material, and

Boundary face, it to be connected with above-mentioned second body by above-mentioned first body and forms;

Noncontact rate caused by the gap that above-mentioned boundary face exists is defined by following mathematical expression, and this noncontact rate is less than 30%,

Wherein, L represents the arc length summation in the gap existed in the boundary face of complex heat transfer pipe, and r' represents the radius of boundary face.

2. complex heat transfer pipe according to claim 1, is characterized in that, above-mentioned noncontact rate is 5.0% ~ 25.3%.

3. complex heat transfer pipe according to claim 1, is characterized in that,

The rigidity of above-mentioned first body is 60 ~ 130Gpa,

The rigidity of above-mentioned second body is 100 ~ 200Gpa.

4. complex heat transfer pipe according to claim 1, is characterized in that, above-mentioned first metal material is Al or Al alloy.

5. complex heat transfer pipe according to claim 4, is characterized in that, the rigidity of above-mentioned first body is 60 ~ 130Gpa.

6. complex heat transfer pipe according to claim 4, is characterized in that, above-mentioned second metal material is any one in Cu, Cu alloy, Ti, Ti alloy, stainless steel.

7. complex heat transfer pipe according to claim 6, is characterized in that, the rigidity of above-mentioned second body is 100 ~ 200Gpa.

8. complex heat transfer pipe according to claim 1, is characterized in that, above-mentioned first metal material is Cu or Cu alloy.

9. complex heat transfer pipe according to claim 8, is characterized in that, the rigidity of above-mentioned first body is 60 ~ 130Gpa.

10. complex heat transfer pipe according to claim 8, is characterized in that, above-mentioned second metal material is any one in Ti, Ti alloy, stainless steel.

11. complex heat transfer pipes according to claim 10, is characterized in that, the rigidity of above-mentioned second body is 100 ~ 200Gpa.

12. complex heat transfer pipes according to claim 1, is characterized in that,

Above-mentioned first metal material is the alloy of any one or they in Al and Cu,

Above-mentioned second metal material is alloy or the stainless steel of any one or they selected in Cu, Ti,

The rigidity of above-mentioned first body is 60 ~ 130Gpa,

The rigidity of above-mentioned second body is 100 ~ 200Gpa.

13. 1 kinds of heat exchangers, is characterized in that, this heat exchanger comprises complex heat transfer pipe according to claim 1.

14. 1 kinds of heat-exchange systems, is characterized in that, this heat-exchange system comprises heat exchanger according to claim 13, and utilize this heat exchanger to perform heat exchange.

The manufacture method of 15. 1 kinds of complex heat transfer pipes, is characterized in that,

Comprise following step:

The second metal tube being used for the second body is inserted into the inside of the first metal tube for the first body, is manufactured the step of naked pipe by expander operation,

Put into the chipware with spiral for the formation of ridge projections in the inside of above-mentioned naked pipe, and under the state setting the roller for forming projection in the outside of above-mentioned naked pipe, rotate the step of naked pipe tractive naked pipe;

In above-mentioned expander operation, applied pressure and the pressure when forming the exterior protrusions of above-mentioned ridge projections and above-mentioned naked pipe are adjusted to, the noncontact rate caused by gap of the boundary face that the first body and the second body are connected is below 30%, this noncontact rate is defined by following mathematical expression

Wherein, L represents the arc length summation in the gap existed in boundary face, and r' represents the radius of boundary face.