KR100467339B1 - Manufacturing method for condenser tube - Google Patents
Manufacturing method for condenser tube Download PDFInfo
- Publication number
- KR100467339B1 KR100467339B1 KR10-2002-0066383A KR20020066383A KR100467339B1 KR 100467339 B1 KR100467339 B1 KR 100467339B1 KR 20020066383 A KR20020066383 A KR 20020066383A KR 100467339 B1 KR100467339 B1 KR 100467339B1
- Authority
- KR
- South Korea
- Prior art keywords
- plate member
- high frequency
- roll forming
- frequency welding
- cladding
- Prior art date
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
- B23P15/00—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass
- B23P15/26—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass heat exchangers or the like
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D17/00—Forming single grooves in sheet metal or tubular or hollow articles
- B21D17/02—Forming single grooves in sheet metal or tubular or hollow articles by pressing
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D17/00—Forming single grooves in sheet metal or tubular or hollow articles
- B21D17/04—Forming single grooves in sheet metal or tubular or hollow articles by rolling
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D5/00—Bending sheet metal along straight lines, e.g. to form simple curves
- B21D5/06—Bending sheet metal along straight lines, e.g. to form simple curves by drawing procedure making use of dies or forming-rollers, e.g. making profiles
- B21D5/10—Bending sheet metal along straight lines, e.g. to form simple curves by drawing procedure making use of dies or forming-rollers, e.g. making profiles for making tubes
- B21D5/12—Bending sheet metal along straight lines, e.g. to form simple curves by drawing procedure making use of dies or forming-rollers, e.g. making profiles for making tubes making use of forming-rollers
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K1/00—Soldering, e.g. brazing, or unsoldering
- B23K1/0008—Soldering, e.g. brazing, or unsoldering specially adapted for particular articles or work
- B23K1/0012—Brazing heat exchangers
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K2101/00—Articles made by soldering, welding or cutting
- B23K2101/04—Tubular or hollow articles
- B23K2101/14—Heat exchangers
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K2103/00—Materials to be soldered, welded or cut
- B23K2103/08—Non-ferrous metals or alloys
- B23K2103/10—Aluminium or alloys thereof
Abstract
본 발명은 열교환기용 튜브의 제조방법에 대한 것으로, 발명의 주된 목적은 튜브를 제조하되, 롤포밍의 방법으로 상판부재와 하판부재를 각각 제조한 후, 이들을 맞대어 고주파 용접의 방법으로 일체화하므로써, 내부의 격벽에 불연속 유로를 보장하는 구조로 제조하기에 용이하도록 하는데 있으며, 또 한편으로는 가공상의 문제점으로 인해 크랙이나 균열 발생이 예방될 수 있도록 하는데 있으며, 또 한편으로는 이들 튜브의 외측면에 접합되는 냉각핀을 클래드 접합제가 도포되지 않은 것을 사용할 수도 있도록 하는데 있으며, 그 외에 재료비를 절감하고 생산성을 향상시킬 수 있도록 하는데 목적이 있는 것이다.The present invention relates to a method for manufacturing a tube for a heat exchanger, the main object of the invention is to produce a tube, by manufacturing a top plate member and a bottom plate member by the method of roll forming, and then to face them to be integrated by the method of high frequency welding, It is to make it easy to manufacture the structure to guarantee the discontinuous flow path in the bulkhead of the partition, and on the other hand to prevent the occurrence of cracks or cracks due to processing problems, on the other hand is bonded to the outer surface of these tubes The cooling fin is to be used that is not coated with the cladding binder, in addition to the purpose is to reduce the material cost and improve productivity.
상기 목적을 달성하기 위한 본 발명의 특징적인 방법은 알루미늄 판재(11)를 준비한 후, 그 일측 표면에 브레이징 용접용 클래드 접합재(12)를 도포하여 소재를 준비 하는 클래드 접합재 도포과정; 상기 클래드 접합재 도포과정을 마친 소재(10)를 롤 포밍 가공방법으로 가공하되, 클래드 접합재(12)가 도포되지 않은쪽 면에 길이 방향으로 다수의 격벽(13)이 형성되도록 하는 롤 포밍 가공과정; 상기 롤 포밍 가공공정을 마친 한 쌍의 소재를 상판부재(a)와 하판부재(b)로 하여 서로의 격벽과 격벽이 맞대어지도록 한 상태에서 그 맞대어진 면을 고주파 용접의 방법으로 용접하는 고주파 용접과정; 상기 고주파 용접과정을 마친 후, 상판부재와 하판부재가 갖는 외관 플랜지부분을 절삭하여 제거하는 마무리 다듬질 가공과정;을 차례로 거쳐 완성하는 것이다.A characteristic method of the present invention for achieving the above object is a cladding material coating process of preparing a material by applying a cladding bonding material 12 for brazing welding after preparing the aluminum plate (11); A roll forming process of processing the material 10 of the cladding material applying process by a roll forming process, so that a plurality of partition walls 13 are formed in a longitudinal direction on a surface on which the clad bonding material 12 is not applied; High frequency welding for welding abutted surfaces by a method of high frequency welding in a state in which a pair of raw materials having completed the roll forming process are formed as a top plate member (a) and a bottom plate member (b) so that the partition walls and the partition walls face each other. process; After finishing the high frequency welding process, the finishing finishing process for cutting and removing the outer flange portion of the upper plate member and the lower plate member;
Description
본 발명은 열교환기용 튜브의 제조방법에 대한 것으로, 압연에 의해 상판부재와 하판부재를 제작한 후, 이들을 서로 맞대어 고주파 용접하는데 특징이 있는 것이다.BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for manufacturing a heat exchanger tube, and is characterized by fabricating an upper plate member and a lower plate member by rolling, and then welding them against each other by high frequency welding.
일반적으로 열교환기용 튜브는 헤더 파이프와 헤더 파이프의 사이에 연결하여 유로를 형성하고, 그 사이 사이에 지그 재그로 절곡하여 개입시킨 냉각핀으로써 열교환 효과를 극대화 시키고자 노력하고 있다.In general, the tube for the heat exchanger is connected between the header pipe and the header pipe to form a flow path, and trying to maximize the heat exchange effect by the cooling fin bent by intervening by jig between them.
특히, 튜브는 유체의 열접촉 면적을 극대화하고자 하는 점과, 내부에서의 유로저항을 극소화하고자 하는 점에 있어서 상반되는 사항이기 때문에 어떻게 제작하는가가 중요하다.In particular, it is important to manufacture a tube because it is a matter of maximizing the thermal contact area of the fluid and minimizing the flow path resistance therein.
도 1은 압출의 제조방법으로 만든 종래의 튜브로서, 내부에 다수의 격벽을 갖는 것이나, 이와 같이 압출의 방법으로 제조한 튜브는 유체직경을 작게 하면 열교환 성능이 향상되나 작게 하는데 한계가 있고, 불연속적인 유체직경 상태로 제작할 수 없으며, 특히 압출 금형에 미세한 흠집이라도 발생하면 소재의 융합이 잘 안되어 내압에 못견디는 문제점이 있다.1 is a conventional tube made by the manufacturing method of the extrusion, having a plurality of partitions therein, the tube manufactured by the extrusion method as described above, the heat exchange performance is improved when the fluid diameter is small, but there is a limit to small, discontinuous It can not be produced in the state of the normal fluid diameter, in particular, even if a minute scratches in the extrusion die has a problem that the material is not fused well withstand the internal pressure.
도 2는 롤포밍의 방법으로 판재를 만든 후, 그 판재를 절첩하여 유로를 형성한 것인 바, 소재 재료비가 상승하고, 롤 포밍시 접힘부분에 크랙이 발생하기 쉽고, 크랙이 발생될 경우 내압에 견디지 못한다.Figure 2 is made of a plate by the method of roll forming, then folded the plate to form a flow path, the material cost increases, cracking easily occurs in the folded portion during the roll forming, when cracking occurs I can't stand it.
따라서 본 발명은 상기와 같은 종래의 문제점을 개선하기 위해 안출한 것으로, 발명의 주된 목적은 튜브를 제조하되, 롤포밍의 방법으로 상판부재와 하판부재를 각각 제조한 후, 이들을 맞대어 고주파 용접의 방법으로 일체화하므로써, 내부의 격벽에 불연속 유로를 보장하는 구조로 제조하기에 용이하도록 하는데 있으며, 또 한편으로는 가공상의 문제점으로 인해 크랙이나 균열 발생이 예방될 수 있도록 하는데 있으며, 또 한편으로는 이들 튜브의 외측면에 접합되는 냉각핀을 클래드 접합제가 도포되지 않은 것을 사용할 수도 있도록 하는데 있으며, 그 외에 재료비를 절감하고 생산성을 향상시킬 수 있도록 하는데 목적이 있는 것이다.Therefore, the present invention has been made in order to improve the conventional problems as described above, the main object of the invention is to produce a tube, by manufacturing a top plate member and a bottom plate member by the method of roll forming, respectively, and then faced with the method of high frequency welding It is easy to manufacture in a structure that guarantees a discontinuous flow path in the inner partition wall, and on the other hand, to prevent the occurrence of cracks or cracks due to processing problems, and on the other hand Cooling fins bonded to the outer surface of the cladding is not to be applied to the one that is applied to the coating, in addition to the purpose is to reduce material costs and improve productivity.
상기 목적을 달성하기 위한 본 발명의 특징적인 방법은 알루미늄 판재를 준비한 후, 그 일측 표면에 브레이징 용접용 클래드 접합재를 도포하여 소재를 준비 하는 클래드 접합재 도포과정; 상기 클래드 접합재 도포과정을 마친 소재를 롤 포밍 가공방법으로 가공하되, 클래드 접합재가 도포되지 않은쪽 면에 길이 방향으로 다수의 격벽이 형성되도록 하는 롤 포밍 가공과정; 상기 롤 포밍 가공공정을 마친 한 쌍의 소재를 상판부재와 하판부재로 하여 서로의 격벽과 격벽이 맞대어지도록 한 상태에서 그 맞대어진 면을 고주파 용접의 방법으로 용접하는 고주파 용접과정; 상기 고주파 용접과정을 마친 후, 상판부재와 하판부재가 갖는 외관 플랜지부분을 절삭하여 제거하는 마무리 다듬질 가공과정; 을 차례로 거쳐 완성하는 것이다.A characteristic method of the present invention for achieving the above object is a cladding material coating process of preparing a material by applying a cladding bonding material for brazing welding on one surface after preparing an aluminum plate; A roll forming process of processing the material of the cladding material coating process by a roll forming process, wherein a plurality of partition walls are formed in a longitudinal direction on a surface of the clad bonding material not coated; A high frequency welding process in which a pair of raw materials having completed the roll forming process are used as the upper plate member and the lower plate member to weld the opposed surfaces to each other by a high frequency welding method in a state where the partition walls and the partition walls face each other; After finishing the high frequency welding process, finishing finishing process of cutting and removing the outer flange portion of the upper plate member and the lower plate member; This is done in turn.
도 1은 종래의 압출제작된 열교환기용 튜브의 단면도1 is a cross-sectional view of a tube for a conventional extruded heat exchanger
도 2는 종래의 롤 포밍 가공된 열교환기용 튜브의 단면도Figure 2 is a cross-sectional view of a tube for a conventional roll forming process heat exchanger
도 3은 본 발명의 열교환기용 튜브의 구성을 보인 단면도Figure 3 is a cross-sectional view showing the configuration of the tube for the heat exchanger of the present invention
도 4는 본 발명의 열교환기 제조용 하부판재의 사시도Figure 4 is a perspective view of the lower plate for producing a heat exchanger of the present invention
도 5는 본 발명의 열교환기용 튜브를 제조하는 공정도5 is a process chart for manufacturing a tube for a heat exchanger of the present invention
<도면의 주요 부분에 대한 부호설명><Code Description of Main Parts of Drawing>
10 : 소재10: material
11 : 판재11: plate
12 : 클래드 접합재12: cladding material
13 : 격벽13: bulkhead
13a : 연결홈13a: Connecting groove
14 : 플랜지부14: flange portion
이하 본 발명의 제조방법을 첨부 도면에 따라 상세히 설명한다.Hereinafter, the manufacturing method of the present invention will be described in detail with reference to the accompanying drawings.
본 발명은 도 4에서 보는 바와 같이 클래드 접합재 도포과정, 롤 포밍 가공공정, 고주파 용접과정, 다듬질 가공과정을 거친다.As shown in FIG. 4, the present invention undergoes a cladding material coating process, a roll forming process, a high frequency welding process, and a finishing process.
클래드 접합재 도포과정은 소정의 알루미늄 판재(11)를 준비한 후, 그 일측 표면에 브레이징 용접용 클래드 접합재(12)를 도포하여 소재(10)를 준비 하는 것이다.Clad bonding material coating process is to prepare a predetermined aluminum plate 11, and then to prepare the material 10 by applying the clad bonding material 12 for brazing welding on one surface thereof.
이때의 클래드 접합재(12)는 소재(10)보다 융점보다 낮은 재료이며, 롤 포밍 가공공정은 상기 클래드 접합재 도포과정을 마친 소재(10)를 롤 포밍 가공방법으로 가공하되, 클래드 접합재(12)가 도포되지 않은쪽 면에 길이 방향으로 다수의 격벽(13)이 형성되도록 하는 것이다.At this time, the cladding material 12 is a material lower than the melting point than the material 10, the roll forming process is to process the material 10, the cladding material coating process is completed by the roll forming method, the cladding material 12 is A plurality of partitions 13 are formed in the longitudinal direction on the uncoated side.
그리고, 고주파 용접과정은 상기 롤 포밍 가공공정을 마친 한 쌍의 소재를 상판부재(a)와 하판부재(b)로 하여 서로의 격벽과 격벽, 그리고 각각의 끝단부가 서로 맞대어지도록 한 상태에서 그 맞대어진 모든 면들을 고주파 용접의 방법으로 용접하는 것이다.In the high frequency welding process, the pair of raw materials having completed the roll forming process are used as the upper plate member (a) and the lower plate member (b) so that the partition walls, the partition walls, and the end portions thereof face each other. All the faces that are gone are welded by high frequency welding.
다듬질 가공과정은 최종 과정으로서, 롤 포밍 가공과정에서 발생되는 소재(10) 좌, 우 끝단의 플랜지부(14)를 절삭하여 제거하는 과정이다.The finishing process is a final process, which is a process of cutting and removing the flange portion 14 of the left and right ends of the material 10 generated during the roll forming process.
한편, 상기한 롤 포밍 가공과정과 고주파 용접과정의 사이에 프레스가공(또는 롤러가공)의 방법으로 상기 격벽(13)에 유체가 불연속적으로 흐르도록 하기 위해 그 격벽상에 임의의 간격으로 연결홈(13a)을 형성하는 연결홈 가공과정을 포함하여 실시할 수도 있다.On the other hand, between the roll forming process and the high frequency welding process in order to allow the fluid to flow discontinuously into the partition 13 by the press working (or roller processing) connection grooves at random intervals on the partition wall. It can also be carried out including the process of connecting groove forming the (13a).
이상과 같은 제조과정을 거쳐 완성된 튜브의 형상은 도 3에서 보는 바와 같으며, 완성된 어느 한 단면의 두께가 약 0.05mm ~ 0.4mm 의 두께를 갖는 상태로 제작할 수 있다.The shape of the tube completed through the manufacturing process as described above is as shown in Figure 3, it can be produced in a state having a thickness of about 0.05mm ~ 0.4mm of the finished cross-section.
예컨대, 도 3의 튜브는 그 실제 치수를 튜브의 전체 높이 약 1.2mm, 전체 폭 약 14mm, 어느 한 부분의 격벽 두께 약 0.2mm 로 한 것이다.For example, the tube of FIG. 3 has an actual dimension of about 1.2 mm in total height of the tube, about 14 mm in total width, and about 0.2 mm in thickness of a partition wall in one portion.
한편, 이와 같이 구성된 본 발명의 튜브는 격벽에 길이 방향을 따라 반복되는 연결홈(13a)을 형성하였기 때문에 그 내부를 흐르는 유체가 냉매일 경우, 기체상태의 냉매는 상측 격벽(13)에 형성된 연결홈(13a)을 따라 이동하고, 액체상태의 냉매는 하측 격벽(13)에 형성된 연결홈(13a)을 따라 이동하할 수 있다.On the other hand, the tube of the present invention configured as described above formed a connection groove 13a repeated along the longitudinal direction in the partition wall, when the fluid flowing therein is a refrigerant, the refrigerant in the gaseous state is formed in the upper partition wall 13 The liquid refrigerant may move along the groove 13a and move along the connection groove 13a formed in the lower partition wall 13.
따라서 액체상태의 냉매와 기체상태의 냉매가 서로 분리되면서 흐를 수 있다.Therefore, the liquid refrigerant and the gaseous refrigerant may flow while being separated from each other.
상기 설명과 같은 본 발명의 제조방법은 튜브를 제조하되, 롤포밍의 방법으로 소재를 가공하여 그 한 쌍을 상판부재와 하판부재로 맞댄 후, 이들을 고주파 용접의 방법으로 일체화하므로써 튜브를 완성할 수 있도록 한 것이다.In the manufacturing method of the present invention as described above, the tube is manufactured, but the material is processed by a roll forming method, the pair is joined to the upper plate member and the lower plate member, and the tubes can be completed by integrating them by a high frequency welding method. It would be.
따라서 내부의 격벽에 불연속 유로를 보장하는 구조로 제조하기에 용이하며, 또 한편으로는 가공상의 문제점으로 인해 크랙이나 균열 발생이 예방될 수 있고, 이들 튜브의 외측면에 접합되는 냉각핀을 클래드 접합제가 도포되지 않은 것을 사용할 수 있는 장점이 있으며, 그 외에 재료비를 절감하고 생산성을 향상시킬 수 있다.Therefore, it is easy to manufacture a structure that guarantees a discontinuous flow path in the inner partition wall, and on the other hand, cracks or cracks can be prevented due to processing problems, and cladding the cooling fins bonded to the outer surface of these tubes There is an advantage that can be used that I have not applied, in addition, it can reduce the material cost and improve the productivity.
Claims (3)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR10-2002-0066383A KR100467339B1 (en) | 2002-10-30 | 2002-10-30 | Manufacturing method for condenser tube |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR10-2002-0066383A KR100467339B1 (en) | 2002-10-30 | 2002-10-30 | Manufacturing method for condenser tube |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| KR20040037758A KR20040037758A (en) | 2004-05-07 |
| KR100467339B1 true KR100467339B1 (en) | 2005-01-24 |
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| Application Number | Title | Priority Date | Filing Date |
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| KR10-2002-0066383A KR100467339B1 (en) | 2002-10-30 | 2002-10-30 | Manufacturing method for condenser tube |
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| KR (1) | KR100467339B1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR101511885B1 (en) * | 2010-12-08 | 2015-04-13 | 산후아 홀딩 그룹 컴파니 리미티드 | Method for manufacturing refrigerant guide tube of heat exchanger, refrigerant guide tube manufactured using the method and heat exchanger with the refrigerant guide tube |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112705913B (en) * | 2020-12-21 | 2021-11-26 | 西安天力金属复合材料股份有限公司 | Method for processing large-size copper or copper alloy cooling plate |
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|---|---|---|---|---|
| JPS6316508U (en) * | 1986-02-10 | 1988-02-03 | ||
| JPH0284252A (en) * | 1988-06-10 | 1990-03-26 | Matsushita Seiko Co Ltd | Heat exchanger tube and its manufacture |
| JPH06281373A (en) * | 1993-03-26 | 1994-10-07 | Showa Alum Corp | Refrigerant flow tube for heat exchanger |
| KR950011041A (en) * | 1993-10-06 | 1995-05-15 | 박종순 | Manufacturing method of thin film heat exchanger plate for heat exchanger |
| JPH105911A (en) * | 1996-06-26 | 1998-01-13 | Showa Alum Corp | Production of flat heat exchange tube |
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2002
- 2002-10-30 KR KR10-2002-0066383A patent/KR100467339B1/en not_active IP Right Cessation
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6316508U (en) * | 1986-02-10 | 1988-02-03 | ||
| JPH0284252A (en) * | 1988-06-10 | 1990-03-26 | Matsushita Seiko Co Ltd | Heat exchanger tube and its manufacture |
| JPH06281373A (en) * | 1993-03-26 | 1994-10-07 | Showa Alum Corp | Refrigerant flow tube for heat exchanger |
| KR950011041A (en) * | 1993-10-06 | 1995-05-15 | 박종순 | Manufacturing method of thin film heat exchanger plate for heat exchanger |
| JPH105911A (en) * | 1996-06-26 | 1998-01-13 | Showa Alum Corp | Production of flat heat exchange tube |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR101511885B1 (en) * | 2010-12-08 | 2015-04-13 | 산후아 홀딩 그룹 컴파니 리미티드 | Method for manufacturing refrigerant guide tube of heat exchanger, refrigerant guide tube manufactured using the method and heat exchanger with the refrigerant guide tube |
| US9885521B2 (en) | 2010-12-08 | 2018-02-06 | Sanhua (Hangzhou) Micro Channel Heat Exchanger Co., Ltd. | Method for manufacturing refrigerant guide tube of heat exchanger, refrigerant guide tube manufactured using the method and heat exchanger with the refrigerant guide tube |
Also Published As
| Publication number | Publication date |
|---|---|
| KR20040037758A (en) | 2004-05-07 |
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