CN111879161A - Integrally welded aluminum pipe aluminum sheet heat exchanger and manufacturing method thereof - Google Patents
Integrally welded aluminum pipe aluminum sheet heat exchanger and manufacturing method thereof Download PDFInfo
- Publication number
- CN111879161A CN111879161A CN202010813733.2A CN202010813733A CN111879161A CN 111879161 A CN111879161 A CN 111879161A CN 202010813733 A CN202010813733 A CN 202010813733A CN 111879161 A CN111879161 A CN 111879161A
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- China
- Prior art keywords
- aluminum
- heat exchanger
- pipe
- tube
- welding
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- 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
- 229910052782 aluminium Inorganic materials 0.000 title claims abstract description 205
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 title claims abstract description 200
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 9
- 238000005219 brazing Methods 0.000 claims abstract description 60
- 239000011888 foil Substances 0.000 claims abstract description 46
- 238000003466 welding Methods 0.000 claims abstract description 43
- 239000000463 material Substances 0.000 claims abstract description 39
- 238000002844 melting Methods 0.000 claims abstract description 27
- 230000008018 melting Effects 0.000 claims abstract description 27
- 239000011248 coating agent Substances 0.000 claims abstract description 19
- 238000000576 coating method Methods 0.000 claims abstract description 19
- 229910000679 solder Inorganic materials 0.000 claims description 3
- 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
- 238000000034 method Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
Images
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
- F28F1/00—Tubular elements; Assemblies of tubular elements
- F28F1/10—Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses
- F28F1/12—Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses the means being only outside the tubular element
- F28F1/24—Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses the means being only outside the tubular element and extending transversely
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
- F28F21/00—Constructions of heat-exchange apparatus characterised by the selection of particular materials
- F28F21/08—Constructions of heat-exchange apparatus characterised by the selection of particular materials of metal
- F28F21/081—Heat exchange elements made from metals or metal alloys
- F28F21/084—Heat exchange elements made from metals or metal alloys from aluminium or aluminium alloys
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
- F28F9/00—Casings; Header boxes; Auxiliary supports for elements; Auxiliary members within casings
- F28F9/02—Header boxes; End plates
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
- F28F9/00—Casings; Header boxes; Auxiliary supports for elements; Auxiliary members within casings
- F28F9/02—Header boxes; End plates
- F28F9/04—Arrangements for sealing elements into header boxes or end plates
- F28F9/16—Arrangements for sealing elements into header boxes or end plates by permanent joints, e.g. by rolling
- F28F9/18—Arrangements for sealing elements into header boxes or end plates by permanent joints, e.g. by rolling by welding
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Geometry (AREA)
- Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
- Details Of Heat-Exchange And Heat-Transfer (AREA)
Abstract
The invention provides an integrally welded aluminum tube and aluminum sheet heat exchanger which comprises a plurality of aluminum tubes and aluminum foil fins, wherein the aluminum tubes and the aluminum foil fins are in interference fit, and the aluminum tubes and the aluminum foil fins are integrally formed through brazing. The invention also provides a manufacturing method of the integrally welded aluminum tube and aluminum sheet heat exchanger. The heat exchanger adopts the aluminum pipe and the aluminum foil fin, the outer surface of the aluminum pipe contains a coating of brazing material, the temperature in a brazing furnace for welding the elbow is higher than the melting point of the brazing material and lower than the melting point of the aluminum material, the elbow is welded with the aluminum pipe into a whole through a welding ring, meanwhile, the coating of the brazing material on the surface of the aluminum pipe reaches the welding melting point, the aluminum pipe and the aluminum foil fin are fused into a whole through the brazing material, the fin can be kept fixed in the transverse direction, and the fin and the aluminum pipe are completely welded into; the heat exchange device can effectively avoid the heat contact resistance between the aluminum pipe and the aluminum sheet caused by the clearance generated by the transverse movement of the fins, and reduce the heat exchange efficiency.
Description
Technical Field
The invention relates to the technical field of air conditioners, in particular to an integrally welded aluminum tube and aluminum sheet heat exchanger and a manufacturing method thereof.
Background
The heat exchanger of the air conditioner is mostly assembled by adopting copper pipes and aluminum foil fins in the current market, and then the inner pipe diameter of the copper pipes is expanded through a pipe expanding machine, so that the copper pipes and the aluminum foil fins are tightly attached in an interference manner, the contact thermal resistance between the copper pipes and the aluminum foil is reduced, and the heat exchange efficiency is increased.
Based on the above, there is an urgent need for an integrally welded aluminum tube-aluminum sheet heat exchanger with uniform heat exchange and high heat exchange efficiency and a manufacturing method thereof.
Disclosure of Invention
In order to solve the problems, the invention aims to provide an integrally welded aluminum tube and aluminum sheet heat exchanger and a manufacturing method thereof.
In order to achieve the purpose, the technical scheme of the invention is realized as follows:
the integrally welded aluminum tube and aluminum sheet heat exchanger comprises a plurality of aluminum tubes and aluminum foil fins, wherein the aluminum tubes and the aluminum foil fins are in interference fit, and the aluminum tubes and the aluminum foil fins are integrally formed through brazing.
Further, the aluminum pipe and the aluminum foil fin are tightly attached in an interference fit mode through a pipe expander.
Further, the outer surface of the aluminum pipe contains a coating of brazing material.
Furthermore, the aluminum pipe comprises an aluminum elbow, wherein welding rings are arranged at two ends of the aluminum elbow, and the two ends of the aluminum elbow are welded with the end of the aluminum pipe into a whole through the welding rings.
Further, the aluminum elbow is welded through a vacuum brazing furnace and used for realizing the welding of the welding ring and the end of the aluminum pipe and the welding of the coating of the brazing material on the outer surface of the aluminum pipe and the aluminum foil fin.
Furthermore, the melting points of the welding ring and the brazing material are 438 ℃, and the melting point of the aluminum foil fin is 660 ℃.
Furthermore, the aluminum tubes are long U-shaped aluminum tubes, and a plurality of long U-shaped aluminum tubes are evenly distributed in the aluminum foil fins side by side.
In order to achieve the above object, the present invention also provides a method for manufacturing an integrally welded aluminum tube-aluminum sheet heat exchanger, comprising the steps of:
s1, adopting an aluminum tube and an aluminum foil fin, and adding a coating containing brazing solder on the outer surface of the aluminum tube;
s2, expanding the aluminum pipe of the heat exchanger through a pipe expander;
s3, welding the aluminum elbow through a brazing furnace, wherein the temperature in the brazing furnace for welding the aluminum elbow is higher than the melting point of the brazing material and lower than the melting point of the aluminum material;
s4, in the vacuum brazing furnace, the aluminum elbow is welded with the aluminum pipe into a whole through welding rings, meanwhile, the brazing material coating on the surface of the aluminum pipe reaches the welding melting point, and the aluminum pipe and the aluminum foil fin are fused into a whole through brazing materials.
Has the advantages that: the heat exchanger of the invention adopts an aluminum pipe and an aluminum foil fin, the outer surface of the aluminum pipe contains a coating of brazing material, the aluminum pipe-the aluminum fin is tightly fixed together by interference fit by adopting a pipe expansion process, an elbow with a welding ring is inserted into the end of a long u pipe, the temperature in a vacuum brazing furnace for welding the elbow and the aluminum pipe-the aluminum foil fin is higher than the melting point of the brazing material and lower than the melting point of the aluminum material, the elbow is welded with the aluminum pipe into a whole by the welding ring, meanwhile, the coating of the brazing material on the outer surface of the aluminum pipe reaches the welding melting point, the aluminum pipe and the aluminum foil fin are fused into a whole by the brazing material, the fin can be kept; the heat exchange device can effectively avoid the heat contact resistance between the aluminum pipe and the aluminum sheet caused by the clearance generated by the transverse movement of the fins, and reduce the heat exchange efficiency; in addition, the heat exchanger has the advantages of small mass and low cost, can greatly improve the heat exchange efficiency, and has uniform heat exchange; because the heat exchanger is made of aluminum, the recovery is very convenient.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate an embodiment of the invention and, together with the description, serve to explain the invention and not to limit the invention. In the drawings:
FIG. 1 is a schematic structural diagram of an integrally welded aluminum tube-aluminum sheet heat exchanger according to an embodiment of the present invention;
fig. 2 is a schematic view of a connection structure between an aluminum pipe, an aluminum foil fin, and an aluminum elbow according to an embodiment of the present invention.
Detailed Description
It should be noted that the embodiments and features of the embodiments may be combined with each other without conflict.
The present invention will be described in detail below with reference to the embodiments with reference to the attached drawings.
Example 1
Referring to fig. 1: the integrally welded aluminum tube and aluminum sheet heat exchanger comprises a plurality of aluminum tubes 1 and aluminum foil fins 2, wherein the aluminum tubes 1 and the aluminum foil fins 2 are in interference fit, and the aluminum tubes 1 and the aluminum foil fins 2 are integrally formed through brazing.
The aluminum pipe and the aluminum foil fin are assembled in an interference mode, in addition, the aluminum pipe and the aluminum foil fin are integrally formed through brazing, the aluminum pipe and the aluminum foil fin are prevented from displacing when the air conditioner works, and the heat exchange efficiency of the heat exchanger is improved.
Specifically, the aluminum pipe 1 and the aluminum foil fin 2 are tightly attached in an interference fit mode through a pipe expander, and the outer surface of the aluminum pipe 1 contains a coating of brazing materials.
It should be noted that, in this embodiment, mechanical tube expansion or hydraulic tube expansion can be performed by the tube expander, and this embodiment improves the brazing stability.
Referring to fig. 2: the aluminum pipe is characterized by further comprising an aluminum elbow 3, wherein welding rings 301 are arranged at two ends of the aluminum elbow 3, and two ends of the aluminum elbow 3 are welded with the end 101 of the aluminum pipe into a whole through the welding rings 301.
Specifically, the aluminum elbow 3 is welded by a vacuum brazing furnace to realize the welding of the welding ring 301 and the aluminum pipe end 101 and the welding of the coating of the brazing material on the outer surface of the aluminum pipe 1 and the aluminum foil fin 2.
In the embodiment, the aluminum elbow is welded with the brazing furnace, and the heat conduction is carried out through the connected aluminum pipe, so that the welding stability of the coating of the brazing material on the outer surface of the aluminum pipe and the aluminum foil fin is improved.
Specifically, the melting points of the welding ring 301 and the brazing material are 438 ℃, and the melting point of the aluminum foil fin 2 is 660 ℃.
When the temperature in the brazing furnace reaches 438 ℃ and is lower than 660 ℃, the embodiment ensures that the aluminum elbow is welded with the aluminum pipe into a whole through the welding ring, and meanwhile, the brazing material coating on the surface of the aluminum pipe reaches the welding melting point, so that the aluminum pipe and the aluminum foil fin are fused into a whole through the brazing material.
Preferably, the aluminum pipe 1 is a long U-shaped aluminum pipe, and a plurality of long U-shaped aluminum pipes are uniformly distributed in the aluminum foil fin 2 side by side.
This embodiment has improved the heat exchange efficiency of heat exchanger.
Example 2
In order to achieve the above object, the present embodiment further provides a method for manufacturing an integrally welded aluminum tube-aluminum sheet heat exchanger, including the following steps:
s1, adopting an aluminum tube and an aluminum foil fin, and adding a coating containing brazing solder on the outer surface of the aluminum tube;
s2, expanding the aluminum pipe of the heat exchanger through a pipe expander;
s3, welding the aluminum elbow through a brazing furnace, wherein the temperature in the brazing furnace for welding the aluminum elbow is higher than the melting point of the brazing material and lower than the melting point of the aluminum material;
s4, in the vacuum brazing furnace, the aluminum elbow is welded with the aluminum pipe into a whole through welding rings, meanwhile, the brazing material coating on the surface of the aluminum pipe reaches the welding melting point, and the aluminum pipe and the aluminum foil fin are fused into a whole through brazing materials.
After the tube expansion of the heat exchanger in the embodiment, an aluminum elbow needs to be welded through a brazing furnace, welding rings are arranged at two ends of the aluminum elbow, the melting points of the welding rings and brazing materials are 438 ℃, the melting point of an aluminum tube aluminum foil fin is 660 ℃, the temperature in the vacuum brazing furnace for welding the elbow is higher than the melting point of the brazing materials and lower than the melting point of aluminum materials, the elbow is welded with the aluminum tube through the welding rings into a whole, meanwhile, the brazing material coating on the surface of the aluminum tube reaches the welding melting point, so that the aluminum tube and the aluminum foil fin are fused into a whole through the brazing materials, the fin can be kept fixed in the transverse direction, the fin can be effectively prevented from falling off; the heat exchanger of this embodiment preparation is of small quality, and is with low costs, can greatly improve heat exchange efficiency, and the heat transfer is even.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.
Claims (8)
1. The integrally welded aluminum tube and aluminum sheet heat exchanger is characterized by comprising a plurality of aluminum tubes (1) and aluminum foil fins (2), wherein the aluminum tubes (1) and the aluminum foil fins (2) are in interference fit, and the aluminum tubes (1) and the aluminum foil fins (2) are integrally formed through brazing.
2. The integrally welded aluminum tube-aluminum sheet heat exchanger as recited in claim 1, wherein the aluminum tube (1) and the aluminum foil fin (2) are closely interference-fitted by means of a tube expander.
3. An integrally welded aluminum tube and sheet heat exchanger according to claim 1 wherein the outer surface of the aluminum tube (1) contains a coating of brazing material.
4. The integrally welded aluminum tube aluminum sheet heat exchanger according to claim 3, further comprising an aluminum elbow (3), wherein both ends of the aluminum elbow (3) are provided with welding rings (301), and both ends of the aluminum elbow (3) are welded with the aluminum tube ends (101) through the welding rings (301).
5. The integrally welded aluminum pipe aluminum sheet heat exchanger as recited in claim 4, wherein the aluminum elbow (3) is welded by a vacuum brazing furnace for achieving welding of a weld ring (301) to an aluminum pipe end (101) and welding of a brazing material coating of an outer surface of the aluminum pipe (1) to an aluminum foil fin (2).
6. The integrally welded aluminum tube aluminum sheet heat exchanger according to claim 5, wherein the melting points of the weld ring (301) and the brazing material are each 438 degrees Celsius, and the melting point of the aluminum foil fin (2) is 660 degrees Celsius.
7. The integrally welded aluminum tube aluminum sheet heat exchanger as recited in claim 2, wherein the aluminum tube (1) is a long U-shaped aluminum tube, and a plurality of the long U-shaped aluminum tubes are uniformly distributed side by side in the aluminum foil fin (2).
8. The manufacturing method of the integrally welded aluminum pipe aluminum sheet heat exchanger is characterized by comprising the following steps of:
s1, adopting an aluminum tube and an aluminum foil fin, and adding a coating containing brazing solder on the outer surface of the aluminum tube;
s2, expanding the aluminum pipe of the heat exchanger through a pipe expander;
s3, welding the aluminum elbow through a brazing furnace, wherein the temperature in the brazing furnace for welding the aluminum elbow is higher than the melting point of the brazing material and lower than the melting point of the aluminum material;
s4, in the vacuum brazing furnace, the aluminum elbow is welded with the aluminum pipe into a whole through welding rings, meanwhile, the brazing material coating on the surface of the aluminum pipe reaches the welding melting point, and the aluminum pipe and the aluminum foil fin are fused into a whole through brazing materials.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010813733.2A CN111879161A (en) | 2020-08-13 | 2020-08-13 | Integrally welded aluminum pipe aluminum sheet heat exchanger and manufacturing method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010813733.2A CN111879161A (en) | 2020-08-13 | 2020-08-13 | Integrally welded aluminum pipe aluminum sheet heat exchanger and manufacturing method thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111879161A true CN111879161A (en) | 2020-11-03 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010813733.2A Pending CN111879161A (en) | 2020-08-13 | 2020-08-13 | Integrally welded aluminum pipe aluminum sheet heat exchanger and manufacturing method thereof |
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| CN (1) | CN111879161A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114811745A (en) * | 2022-05-12 | 2022-07-29 | 朱建军 | Heat exchanger for air conditioner and preparation method thereof |
| CN117161562A (en) * | 2023-08-09 | 2023-12-05 | 浙江烯微新能源科技有限公司 | Welding process for elbow and metal tube of heat exchanger by utilizing laser cladding |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4502532A (en) * | 1981-03-04 | 1985-03-05 | Hitachi, Ltd. | Fin-and-tube type heat exchanger |
| JP2011257084A (en) * | 2010-06-10 | 2011-12-22 | Sumitomo Light Metal Ind Ltd | All-aluminum heat exchanger |
| CN202934256U (en) * | 2012-11-08 | 2013-05-15 | 浙江新锐焊接材料有限公司 | Flat welded ring of aluminum flux-cored wire |
| CN203011200U (en) * | 2012-12-10 | 2013-06-19 | 无锡申达空调设备有限公司 | Heat exchanger of air-cooling oil-gas cooling unit |
| CN108981417A (en) * | 2018-10-12 | 2018-12-11 | 泰铂（上海）环保科技股份有限公司 | A kind of air-conditioning pipe type heat exchanger and its processing method |
| CN212458079U (en) * | 2020-08-13 | 2021-02-02 | 滁州普利斯特软件有限公司 | Integrally welded aluminum pipe aluminum sheet heat exchanger |
-
2020
- 2020-08-13 CN CN202010813733.2A patent/CN111879161A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4502532A (en) * | 1981-03-04 | 1985-03-05 | Hitachi, Ltd. | Fin-and-tube type heat exchanger |
| JP2011257084A (en) * | 2010-06-10 | 2011-12-22 | Sumitomo Light Metal Ind Ltd | All-aluminum heat exchanger |
| CN202934256U (en) * | 2012-11-08 | 2013-05-15 | 浙江新锐焊接材料有限公司 | Flat welded ring of aluminum flux-cored wire |
| CN203011200U (en) * | 2012-12-10 | 2013-06-19 | 无锡申达空调设备有限公司 | Heat exchanger of air-cooling oil-gas cooling unit |
| CN108981417A (en) * | 2018-10-12 | 2018-12-11 | 泰铂（上海）环保科技股份有限公司 | A kind of air-conditioning pipe type heat exchanger and its processing method |
| CN212458079U (en) * | 2020-08-13 | 2021-02-02 | 滁州普利斯特软件有限公司 | Integrally welded aluminum pipe aluminum sheet heat exchanger |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114811745A (en) * | 2022-05-12 | 2022-07-29 | 朱建军 | Heat exchanger for air conditioner and preparation method thereof |
| CN117161562A (en) * | 2023-08-09 | 2023-12-05 | 浙江烯微新能源科技有限公司 | Welding process for elbow and metal tube of heat exchanger by utilizing laser cladding |
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