CN101301695A - Connecting method of heat exchange aluminium tube - Google Patents
Connecting method of heat exchange aluminium tube Download PDFInfo
- Publication number
- CN101301695A CN101301695A CNA2007100573198A CN200710057319A CN101301695A CN 101301695 A CN101301695 A CN 101301695A CN A2007100573198 A CNA2007100573198 A CN A2007100573198A CN 200710057319 A CN200710057319 A CN 200710057319A CN 101301695 A CN101301695 A CN 101301695A
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- CN
- China
- Prior art keywords
- shaped pipe
- pipe
- heat exchange
- solder
- aluminium tube
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000000034 method Methods 0.000 title claims abstract description 28
- 229910052782 aluminium Inorganic materials 0.000 title claims abstract description 25
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 title claims abstract description 25
- 239000004411 aluminium Substances 0.000 title claims abstract description 22
- 229910000679 solder Inorganic materials 0.000 claims abstract description 24
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 16
- 239000010959 steel Substances 0.000 claims abstract description 16
- 238000010438 heat treatment Methods 0.000 claims abstract description 6
- 229910001220 stainless steel Inorganic materials 0.000 claims abstract description 6
- 239000010935 stainless steel Substances 0.000 claims abstract description 6
- 239000000463 material Substances 0.000 claims abstract description 5
- 238000003466 welding Methods 0.000 claims description 13
- 229910001566 austenite Inorganic materials 0.000 claims description 4
- 238000004519 manufacturing process Methods 0.000 claims description 4
- 230000002146 bilateral effect Effects 0.000 claims description 3
- 230000005540 biological transmission Effects 0.000 claims description 3
- 230000009977 dual effect Effects 0.000 abstract 1
- 230000002950 deficient Effects 0.000 description 5
- 230000000694 effects Effects 0.000 description 5
- 238000005476 soldering Methods 0.000 description 5
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 4
- 229910052802 copper Inorganic materials 0.000 description 4
- 239000010949 copper Substances 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 4
- 238000002474 experimental method Methods 0.000 description 4
- 238000005219 brazing Methods 0.000 description 2
- 230000004927 fusion Effects 0.000 description 2
- 238000012797 qualification Methods 0.000 description 2
- 241000167854 Bourreria succulenta Species 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 125000004122 cyclic group Chemical group 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
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- Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
Abstract
The invention discloses a connecting method for a heat exchanging aluminium pipe. A plurality of fins arranged in parallel form a rectangular fin group which passes through a group of lower U-shaped pipes; the diameter of a nozzle of the lower U-shaped pipe is larger than that of the nozzle of an upper U-shaped pipe. The method is characterized in that solder is firstly prepared as sheet-shape and wound at the external diameter of the nozzle of the upper U-shaped pipe till that the upper U-shaped pipe can be just plugged into the lower U-shaped pipe; finally, the U-shaped pipe is symmetrically heated at two sides by dual rows of flames; furthermore, a dismountable steel sleeve is arranged closely to the external side of the interface of the upper U-shaped pipe and the lower U-shaped pipe; the steel sleeve is made of material which can uniformly transmit the temperature; the steel sleeve is made of austenitic heat-resistance stainless steel; the connection of the heat exchanging aluminium pipe is completed by the heating of multi-class flames by times; the thickness of the solder is ranged between 0.5 and 1mm; the optimal thickness of the solder is 0.65mm.
Description
Technical field
The present invention relates to a kind of method of attachment of heat exchanger tube, the method for attachment of heat exchange aluminium tube especially is provided.
Background technology
The method of the former employing copper pipe of the radiator of prior art soldering is made, and its manufacture method is:
As shown in Figure 1, the heat exchanger of prior art comprises that top U-shaped pipe 1, bottom U-shaped pipe 2, baffle plate 3 and fins set 13 constitute.Its manufacture process is:
The first step is inserted bottom U-shaped pipe 2 in the fins set 13.
At first, on streamline,, be fixed on core assembly formation fins set 13 with one group of fuse that keeps predetermined space many fins that are arranged in parallel 9 that vertically puncture fin 9 rectangular shapes.In addition, insert the plate of being made by stainless steel 3 respectively at the two ends up and down of fins set 13, baffle plate 3 is used for and being connected of extraneous parts.
Then, pull up adjacent a pair of fuse, in the hole at original fuse place, insert a bottom U-shaped pipe 2, bottom U-shaped pipe 2 comprises the straight sections 11 of bent portion 12 and two bottom U-shaped pipes of a bottom U-shaped pipe, the straight sections 11 of two bottom U-shaped pipes is parallel and lay respectively at the two ends of the bent portion 12 of bottom U-shaped pipe, make whole bottom U-shaped pipe 2 be the U font, the distance that the straight sections of two bottom U-shaped pipes is 11 equals the distance between the adjacent fuse, so a U-shaped pipe 2 can insert in the hole at original two adjacent fuse places at an easy rate, then, take out two adjacent fuses again, insert a bottom U-shaped pipe 2 again, the rest may be inferred, and till all fuses were substituted by bottom U-shaped pipe 2, so bottom U-shaped pipe 2 had just all inserted fins set 13.
Second step, expand tube and the expand tube again.The method of expand tube has a variety of, but purpose is identical, promptly enlarge the caliber of the straight sections 11 of bottom U-shaped pipe, realize the aperture interference fit of 2 pairs of fins set 13 of bottom U-shaped pipe, reach fins set 13 and be fixed on purpose on the bottom U-shaped pipe 2 firmly, because each fin 9 all is extruded overlap, overlap has been separated adjacent fin 9, makes between per two adjacent fins 9 all to have slit 10 between fin simultaneously.The effect in slit 10 is between fin, is flooded with a large amount of air between fin in the slit 10, and when air communication was crossed between fin slit 10, air was originally carrying the energy that comes from fin 9 conduction, leaves heat exchanger, realizes heat exchange function.
Expand tube as shown in Figure 2 again, because top U-shaped pipe 1 and bottom U-shaped pipe 2 are to be processed by same pipe material usually, so their caliber generally is identical, for top U-shaped pipe 1 is inserted bottom U-shaped pipe 2, the U-shaped interface tube place, bottom 5 at straight sections 11 tops of bottom U-shaped pipe will be carried out reaming, the bore that makes U-shaped interface tube place, bottom 5 is greater than U-shaped interface tube place, top 4.The method of reaming is also a lot, such as, use fixing mould to make a forcible entry into the upper end at U-shaped interface tube place, bottom 5, its bore is increased.
The 3rd step, soldering.Earlier scolder 7 is created circularly, and be enclosed within the outer rim at U-shaped interface tube place, top 4, the thickness of scolder 7 is less than radius poor at U-shaped interface tube place, bottom 5 and U-shaped interface tube place, top 4.Like this, just U-shaped interface tube place 4, top can be put into U-shaped interface tube place, bottom 5 together with scolder 7, gas brazing then connects as one top U-shaped pipe 1 and bottom U-shaped pipe 2.
Each fin generally comprises 5 to 10 U-shaped pipes, therefore, needs 10 to 20 joints of welding, soldering itself has suitable specification requirement, because the U-shaped pipe is thinner, the welding difficulty is just bigger, usually, it is uneven that solder is heated, and, also bad grasp heat time heating time, ring-type scolder 7 is fusing and inflow bottom U-shaped pipe 2 easily, cause filling chink fully, and very difficult the taking-up rewelded.
Because the price of copper is too expensive at present, new technology often adopts aluminium to replace copper.Air conditioner heat radiator adopts aluminum pipe to replace copper pipe, like this, can reduce cost greatly, but in aluminum pipe gas brazing process, to flow downward after 7 heating of ring-type scolder, replenish the welding slit, the mobile distance of scolder 7 is bigger, and the air-tightness of welding point is very poor, and, because flame heat is inhomogeneous, the temperature of heating is difficult to control, and aluminum pipe is easy to burn, cause damage, can't repair, greatly reduce yield rate, therefore need safer aluminium tube joint welding method.
Summary of the invention
Technical problem to be solved by this invention is, a kind of method of attachment of heat exchange aluminium tube is provided, and can avoid the defective of welding, and improves the qualification rate of joint.
In order to solve the problems of the technologies described above, the technical solution used in the present invention is:
Method of attachment as a kind of heat exchange aluminium tube of the present invention, many fins that are arranged in parallel form the fins set of rectangle, have baffle plate on the fins set, fins set is through on one group of bottom U-shaped pipe, the caliber of the straight sections of expansion bottom U-shaped pipe, make the mouth of pipe of bottom U-shaped pipe bigger than the diameter of the mouth of pipe of top U-shaped pipe, this method shape of at first solder will being laminated, then, to be wrapped on the external diameter of the mouth of pipe of top U-shaped pipe, to by chance filling in bottom U-shaped pipe, last, adopt double flame to heat to bilateral symmetry from U type caliber.
And, be close to outside the interface of upper and lower U type pipe, be provided with dismountable steel bushing, steel bushing adopts the relatively more uniform material of transmission temperature to make.
And this steel bushing is the austenite heat-resistance stainless steel manufacturing.
And the connection of this heat exchange aluminium tube is finished by multistage flame heat gradation.
In addition, the thickness of solder remains between 0.5 to 1 millimeter.The optimum thickness of solder is 0.65 millimeter.
The invention has the beneficial effects as follows:
The adding method of solder, the mobile distance of having cut down solder, the setting of steel bushing has guaranteed the interface thermally equivalent.
Description of drawings
Fig. 1 is a prior art heat exchanger structure partial schematic diagram
Fig. 2 is the welding method structural representation of prior art heat exchanger joint
Fig. 3 is the structural representation of the method for attachment of heat exchange aluminium tube of the present invention
Among the figure:
1: top U-shaped pipe 2: bottom U-shaped pipe
3: baffle plate 4: U-shaped interface tube place, top
5: U-shaped interface tube place, bottom 6: flame
7: solder 8: steel bushing
9: fin 10: slit between fin
11: the straight sections 12 of bottom U-shaped pipe: the bent portion of bottom U-shaped pipe
13: fins set
The specific embodiment
Be described in further detail below in conjunction with the method for attachment of the drawings and specific embodiments heat exchange aluminium tube of the present invention:
The present invention at first inserts fins set 13 with bottom U-shaped pipe 2, and many fins that are arranged in parallel form the fins set of rectangle, have baffle plate on the fins set, and fins set is through on one group of bottom U-shaped pipe.Then, carry out expand tube and expand tube again, behind the caliber of the straight sections of expansion bottom U-shaped pipe, the mouth of pipe of bottom U-shaped pipe is bigger than the diameter of the mouth of pipe of top U-shaped pipe.
Then, carry out soldering.The shape of at first solder 7 will being laminated, become metal forming, solder 7 is wrapped on the external diameter of the mouth of pipe of top U-shaped pipe 1, size of population is by chance consistent with bottom U-shaped pipe 2 internal diameters, top U-shaped pipe 1 inserts downwards in the bottom U type pipe 2 in the lump together with the solder 7 of the mouth of pipe, like this, just U-shaped interface tube place 4, top can be put into U-shaped interface tube place, bottom 5 together with scolder 7, scolder 7 also just is clipped between two solders side tightly.Then, adopt double flame 6 to heat to bilateral symmetry from U type caliber respectively.After solder 7 fusings of sheet, only can carry out trickle horizontal cyclic motion, just fill the slit between pipe, not need to flow downward, obturation effect is very good.
The interface outside of being close to upper and lower U type pipe 1,2, be provided with dismountable steel bushing 8, steel bushing 8 adopts the relatively more uniform material of transmission temperature to make, the heat that flame 6 sends is through steel bushing 8, just be delivered to the solder 7 between U-shaped interface tube place, top 4 and the U-shaped interface tube place, bottom 5, U-shaped interface tube place, top 4, U-shaped interface tube place 5, bottom and solder 7 be thermally equivalent all, the phenomenon of grilling thoroughly tube wall of having avoided appearance to cause because of local temperature is higher.
Prove that through contrast experiment repeatedly when this steel bushing 8 was made for austenite heat-resistance stainless steel, its heat conduction and heat insulation effect were best.Austenite heat-resistance stainless steel can bear Celsius 650 for a long time and spend to the heating of the welding flame of 680 degree, and welding point evenly heats by this steel bushing, and heating-up temperature is controlled at the fusion temperature of solder easily, avoids burn-through.
From another angle, the welding of heat exchange aluminium tube will be heated by multistage flame 6, such as, use high temperature earlier, when reaching certain hour or temperature, adopt temperature on the low side, can improve yield rate, simultaneously, finish by welding is divided into repeatedly, each heated time is short, also can reduce the probability of burn-through.
Like this, when flame 6 solderings, the qualification rate that top U-shaped pipe 1 and bottom U-shaped pipe 2 are connected as one is quite high.
In the experiment, the caliber of top U-shaped pipe 1 and bottom U-shaped pipe 2 is 7 millimeters, 0.7 millimeter of wall thickness, bottom U-shaped pipe 2 is behind expander, and caliber reaches more than 8.5, and wall thickness is attenuation correspondingly, through contrast experiment's digital proof repeatedly, the thickness of solder 7 remains between 0.5 to 1 millimeter, and the effect of welding is preferably, can obtain the optimum efficiency value when Thickness Design of solder 7 is 0.65 millimeter.
By comparing experiment with two kinds of diverse ways, drawn the experimental data of fraction defective, the fraction defective of prior art is about 75%, and the fraction defective of the method for attachment of heat exchange aluminium tube of the present invention is below 10%, the defective products rate is the quantity of burn-through or incomplete fusion and the ratio of all testing quantity, digital proof, effect of the present invention is obvious unusually.
The Patent right protection domain of the present invention is as the criterion with the content of its claim, and specification and accompanying drawing can be used to explain claim.All technical schemes with the invention described above, the new solution that direct replacement or the technology essential factor by customary means changes simply, superposes and form, still belong to the scope of the present invention row.
Claims (6)
1, a kind of method of attachment of heat exchange aluminium tube, many fins that are arranged in parallel form the fins set of rectangle, have baffle plate on the fins set, fins set is through on one group of bottom U-shaped pipe, the caliber of the straight sections of expansion bottom U-shaped pipe, make the mouth of pipe of bottom U-shaped pipe bigger than the diameter of the mouth of pipe of top U-shaped pipe, it is characterized in that: in the method for attachment of described heat exchange aluminium tube, the shape of at first solder (7) will being laminated, then, solder (7) is wrapped on the external diameter of the mouth of pipe of top U-shaped pipe (1), to by chance filling in bottom U-shaped pipe (2), at last, adopt double flame (6) to heat to bilateral symmetry from U type caliber.
2, the method for attachment of heat exchange aluminium tube according to claim 1 is characterized in that: be close to the interface outside of described upper and lower U type pipe (1,2), be provided with dismountable steel bushing (8), steel bushing (8) adopts the relatively more uniform material of transmission temperature to make.
3, the method for attachment of heat exchange aluminium tube according to claim 2 is characterized in that: described steel bushing (8) is the austenite heat-resistance stainless steel manufacturing.
4, the method for attachment of heat exchange aluminium tube according to claim 2 is characterized in that: the welding of described heat exchange aluminium tube will be finished by multistage flame (6) heating gradation.
5, according to the method for attachment of any one described heat exchange aluminium tube in the claim 1 to 4, it is characterized in that: the thickness of described solder (7) remains between 0.5 to 1 millimeter.
6, the method for attachment of heat exchange aluminium tube according to claim 5 is characterized in that: the thickness of described solder (7) is 0.65 millimeter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2007100573198A CN101301695A (en) | 2007-05-10 | 2007-05-10 | Connecting method of heat exchange aluminium tube |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2007100573198A CN101301695A (en) | 2007-05-10 | 2007-05-10 | Connecting method of heat exchange aluminium tube |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101301695A true CN101301695A (en) | 2008-11-12 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA2007100573198A Pending CN101301695A (en) | 2007-05-10 | 2007-05-10 | Connecting method of heat exchange aluminium tube |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101301695A (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103143852A (en) * | 2011-12-06 | 2013-06-12 | 海信科龙电器股份有限公司 | Braze welding connector and method for welding connector |
| CN104526103A (en) * | 2014-12-31 | 2015-04-22 | 杭州玖谷机械科技有限公司 | Fully-automatic flame soldering machine control method |
| CN106052427A (en) * | 2015-04-03 | 2016-10-26 | 世元世龙技术株式会社 | Shell and tube heat exchanger |
| CN106041339A (en) * | 2015-04-03 | 2016-10-26 | 世元世龙技术株式会社 | Shell-and-tube welding method |
| CN108215237A (en) * | 2018-02-26 | 2018-06-29 | 蒋丰亮 | A kind of material for PE heavy caliber fiber reinforcement pipelines squeezes out and molding press device |
| CN110345642A (en) * | 2019-07-03 | 2019-10-18 | 宁波方太厨具有限公司 | Condensing heat exchanger and its manufacturing method, gas heater |
| CN111195756A (en) * | 2018-11-19 | 2020-05-26 | 新昌县四通机电有限公司 | Welding method, manufacturing method and refrigerating system |
-
2007
- 2007-05-10 CN CNA2007100573198A patent/CN101301695A/en active Pending
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103143852A (en) * | 2011-12-06 | 2013-06-12 | 海信科龙电器股份有限公司 | Braze welding connector and method for welding connector |
| CN103143852B (en) * | 2011-12-06 | 2016-04-20 | 海信科龙电器股份有限公司 | A kind of soldering connection interface and the method that this interface is welded |
| CN104526103A (en) * | 2014-12-31 | 2015-04-22 | 杭州玖谷机械科技有限公司 | Fully-automatic flame soldering machine control method |
| CN104526103B (en) * | 2014-12-31 | 2016-09-07 | 杭州玖谷机械科技有限公司 | A kind of control method of full automatic flame solderer |
| CN106052427A (en) * | 2015-04-03 | 2016-10-26 | 世元世龙技术株式会社 | Shell and tube heat exchanger |
| CN106041339A (en) * | 2015-04-03 | 2016-10-26 | 世元世龙技术株式会社 | Shell-and-tube welding method |
| CN108215237A (en) * | 2018-02-26 | 2018-06-29 | 蒋丰亮 | A kind of material for PE heavy caliber fiber reinforcement pipelines squeezes out and molding press device |
| CN111195756A (en) * | 2018-11-19 | 2020-05-26 | 新昌县四通机电有限公司 | Welding method, manufacturing method and refrigerating system |
| CN110345642A (en) * | 2019-07-03 | 2019-10-18 | 宁波方太厨具有限公司 | Condensing heat exchanger and its manufacturing method, gas heater |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Open date: 20081112 |