KR20030018423A - Header of heat exchanger and method of manufacture - Google Patents

Header of heat exchanger and method of manufacture Download PDF

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Publication number
KR20030018423A
KR20030018423A KR1020010052143A KR20010052143A KR20030018423A KR 20030018423 A KR20030018423 A KR 20030018423A KR 1020010052143 A KR1020010052143 A KR 1020010052143A KR 20010052143 A KR20010052143 A KR 20010052143A KR 20030018423 A KR20030018423 A KR 20030018423A
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KR
South Korea
Prior art keywords
header
plate
state
heat exchanger
tube
Prior art date
Application number
KR1020010052143A
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Korean (ko)
Inventor
이태호
박차조
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만도공조 주식회사
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Priority to KR1020010052143A priority Critical patent/KR20030018423A/en
Publication of KR20030018423A publication Critical patent/KR20030018423A/en

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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
    • F28F9/00—Casings; Header boxes; Auxiliary supports for elements; Auxiliary members within casings
    • F28F9/005—Other auxiliary members within casings, e.g. internal filling means or sealing means
    • 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
    • B21D53/00—Making other particular articles
    • B21D53/02—Making other particular articles heat exchangers or parts thereof, e.g. radiators, condensers fins, headers
    • B21D53/06—Making other particular articles heat exchangers or parts thereof, e.g. radiators, condensers fins, headers of metal tubes
    • 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
    • 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
    • F28F9/007—Auxiliary supports for elements
    • F28F9/013—Auxiliary supports for elements for tubes or tube-assemblies
    • 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
    • F28F9/26—Arrangements for connecting different sections of heat-exchange elements, e.g. of radiators
    • 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
    • F28F9/22—Arrangements for directing heat-exchange media into successive compartments, e.g. arrangements of guide plates
    • F28F2009/222—Particular guide plates, baffles or deflectors, e.g. having particular orientation relative to an elongated casing or conduit
    • F28F2009/226—Transversal partitions

Abstract

PURPOSE: A header of heat exchanger and a manufacturing method for the same are provided to easily join a refrigerant tube, a baffle, an inlet pipe and an outlet pipe to the header. CONSTITUTION: Joining parts(2) and cut-away parts(3) are formed on both ends of a plate(1). Baffle installation parts(4) are formed on the plate. Notch parts(5) are formed on the plate for insertion of a plurality of tubes. The plate is formed to be circular by roll forming and cut by fixed length. The notch parts are burred to form tube insertion holes(6). A connecting hole(7) is formed on one side of the plate for a refrigerant inlet pipe and a refrigerant outlet pipe joined thereto. The joining parts formed on both ends of the plate are joined to each other to form a header.

Description

열교환기의 헤더와 그 제조방법{HEADER OF HEAT EXCHANGER AND METHOD OF MANUFACTURE}Heat exchanger header and manufacturing method {HEADER OF HEAT EXCHANGER AND METHOD OF MANUFACTURE}

본 발명은 자동차에 설치되어 열교환작용을 하도록 하는 에어컨 등의 열교환기 콘덴서와 인터쿨러, 라디에이터 및 히터코어들의 냉매순환용 튜브를 헤더에 결합하도록 함에 있어서, 상기 헤더를 판재상태에서 배플 설치부를 형성하고 상기 판재 상태의 헤더 양단에 결합부를 형성하여 상기 판재를 원형으로 롤포밍시키며, 상기 롤포밍된 헤더를 사용길이에 따라 절단한 다음, 상기 헤더에 튜브를 삽입할 수 있도록 하는 여러 개의 삽입공을 버링작업으로 형성하도록 하고, 상기 헤더의 양단을 접합시키면서 헤더에 유입 및 유입공을 드릴링하여 헤더를 제조할 수 있도록 한 열교환기의 헤더와 그 제조방법에 관한 것이다.According to the present invention, in the coupling of a refrigerant circulation tube of a heat exchanger condenser and an intercooler, a radiator, and heater cores such as an air conditioner installed in an automobile to perform a heat exchange operation, the header forms a baffle installation part in a sheet state. Forming the coupling portion at both ends of the header of the sheet state roll forming the plate in a circular shape, cutting the roll formed header according to the length of use, and then burring a plurality of insertion holes for inserting the tube into the header The present invention relates to a header of a heat exchanger and a method for manufacturing the same, wherein both ends of the header are joined to each other to drill the inlet and the inlet into the header to manufacture the header.

일반적으로 에어컨등 으로 이용되는 열교환기의 콘덴서와 인터쿨러, 라디에이터 및 히터코어들은 헤더에 여러개의 튜브 삽입공을 형성하고 이 삽입공에는 상기 냉매순환용 튜브를 결합시키며, 상기 튜브들의 사이에는 방열을 위한 방열핀을 설치한 상태에서 상기 헤더를 자동차나 에어컨의 본체에 설치되는 브라켓트에 고정시키도록 되어 있었다.In general, condensers, intercoolers, radiators, and heater cores of heat exchangers used as air conditioners form a plurality of tube insertion holes in a header, and the insertion holes couple the refrigerant circulation tubes, and heat dissipation between the tubes. In the state where the heat radiation fins were installed, the header was fixed to a bracket installed in the main body of the vehicle or the air conditioner.

상기와 같이 구성되는 콘덴서 등의 헤더를 제조함에 있어서는 원형의 파이프 상태로 압출 성형한 소재를 적정한 길이로 절단시킨 다음, 상기 소재에 여러 개의 튜브를 삽입시킬 수 있도록 하는 삽입공을 드릴링작업 등으로 형성하고, 상기 소재에 배플을 설치할 수 있는 배플 설치부와 유입관과 유출관을 설치하도록 하는 통공을가공하여 상기 헤더를 형성하거나, 상기 헤더를 2개로 분리하여 탱크부와 헤더부를 각각 제조하고 상기 헤더부에는 여러 개의 튜브 삽입공과 배플 설치부를 형성하며, 상기 탱크부에는 유입관과 유출관을 설치하는 통공을 각각 형성한 다음, 상기 탱크부와 헤더부를 용접하여 상기 헤더를 구성하도록 되어 잇었다.In manufacturing a header such as a condenser as described above, by cutting a material extruded in a circular pipe state to an appropriate length, and forming an insertion hole for inserting a plurality of tubes in the material by drilling, etc. And forming the header by processing a baffle installation part for installing the baffle on the material and a through hole for installing the inlet pipe and the outflow pipe, or by separating the header into two and manufacturing the tank part and the header part, respectively, The tube was formed with a plurality of tube insertion holes and a baffle mounting portion, and the tank portion was formed with a through hole for installing an inlet pipe and an outlet pipe, respectively, and then the tank portion and the header portion were welded to form the header.

그러나, 상기와 같은 종래의 헤더 제조방법은 상기 파이프형으로 제조할 경우에는 헤더를 파이프 상태로 압출해야 하므로써 이 압출공정에 따른 공수가 많이 들게 되는 폐단이 있었고, 상기 압출된 헤더의 소재에 여러 개의 튜브 삽입공과 배풀 설치부를 형성해야 하므로써 이들의 가공상태가 불량하게 되는 폐단이 있었으며, 상기 가공작업시 헤더가 변형될 염려가 있어 진원도가 정확하게 되지 못하였고 부정확한 진원도에 따라 냉매의 흐름저항이 발생되는 폐단이 있었다.However, in the conventional header manufacturing method as described above, when the pipe is manufactured in the pipe type, the header has to be extruded in a pipe state, and thus there is a closed end that requires a lot of air due to the extrusion process. The tube insert hole and the blast pool installation part had to be formed, and there was a closed end in which the processing state thereof was poor. The header was deformed during the processing operation, so the roundness was not accurate and the flow resistance of the refrigerant was generated according to the incorrect roundness. There was a dissolution.

또, 상기와 탱크부와 헤더부를 분리 제조하는 경우에는 상기 분리 제조하기 위한 2개의 별도 공정을 실행해야 하므로써 작업성이 크게 저하되는 폐단이 있었고, 상기 분리 제조된 헤더부와 탱크부를 용접하기 작업과 공정이 추가되므로 생산성이 크게 저하되는 폐단이 잇었으며, 상기 분리 제조된 탱크부와 헤더부의 조립이 장확하게 되지 못할 경우에는 불량품이 발생되면서 냉매의 흐름상태가 불량하게 되어 열효율이 크게 저하되고 상기 결합상태의 불량으로 인하여 리크가 발생하게 되면서 냉매가 유출되는 점등의 문제점이 있었다.In addition, in the case of separately manufacturing the tank portion and the header portion, there was a closed end that greatly reduced workability by performing two separate processes for the separate manufacturing, and welding the separated manufactured header portion and the tank portion; Since the process is added, there is a closed end where the productivity is greatly reduced, and when the separated manufactured tank unit and the header unit cannot be assembled accurately, a defective product is generated and the flow state of the refrigerant is poor, which greatly reduces the thermal efficiency and the coupling. Leak is generated due to a poor state, there was a problem of the lighting that the refrigerant flows out.

본 발명은 상기와 같은 종래의 제반 문제점을 감안하여 안출한 것으로, 본 발명은 자동차에 설치되어 열교환작용을 하도록 하는 에어컨 등의 열교환기 콘덴서와인터쿨러, 라디에이터 및 히터코어들의 냉매순환용 튜브를 헤더에 결합하도록 함에 있어서, 상기 헤더를 판재상태에서 배플 설치부를 형성하고 상기 판재 상태의 헤더 양단에 결합부를 형성하여 상기 판재를 원형으로 롤포밍시키며, 상기 롤포밍된 헤더를 사용길이에 따라 절단한 다음, 상기 헤더에 튜브를 삽입할 수 있도록 하는 여러 개의 삽입공을 버링작업으로 형성하도록 하고, 상기 헤더의 양단을 접합시키면서 헤더에 유입 및 유입공을 드릴링하여 헤더를 제조할 수 있도록 한 열교환기의 헤더와 그 제조방법을 제공하려는 것인바, 이를 이하에서 첨부한 도면과 실시 예에 의거하여 상세히 설명하면 다음과 같다.The present invention has been made in view of the above-described conventional problems, the present invention is installed in a car heat exchanger condenser and air cooler, such as air conditioners, such as air conditioner to the heat exchanger to the refrigerant circulation tubes of the heater core to the header In the coupling, the header forms a baffle mounting portion in the sheet state and the coupling portion is formed at both ends of the header in the plate state to roll-form the plate into a circle, and the roll-formed header is cut according to the length of use, The header of the heat exchanger to form a plurality of insertion holes for inserting the tube into the header by a burring operation, and to drill the inlet and inlet holes to the header while joining both ends of the header and It is to provide a method of manufacturing the bar, based on the accompanying drawings and examples below If the Hebrews describes as follows:

도 1은 본 발명 실시예의 헤더 제조과정을 나타내는 구성도1 is a block diagram showing a header manufacturing process of an embodiment of the present invention

도 2는 본 발명 실시예의 헤더 결합상태를 나타내는 단면도Figure 2 is a cross-sectional view showing a header coupling state of the embodiment of the present invention

도 3은 본 발명 실시예의 튜브 삽입공을 형성하기 위한 절개부를 형성한 상 태의 발췌도Figure 3 is an excerpt of the state forming the incision for forming the tube insertion hole of the embodiment of the present invention

도 4는 도 3의 다른 실시예를 나타내는 구성도4 is a configuration diagram showing another embodiment of FIG.

도 5는 본 발명 실시예의 튜브 삽입공을 버링하여 형성한 상태를 나타내는 단면도5 is a cross-sectional view showing a state formed by burring the tube insertion hole of the embodiment of the present invention.

<도면의주요부분에대한부호의설명>Explanation of symbols on the main parts of the drawing

1 : 판재1: Plate

2 : 결합부2: coupling part

3 : 절개부3: incision

4 : 배플 설치부4: baffle mounting part

5 : 절결부5: notch

6 : 튜브 삽입공6: tube insertion hole

7 : 통공7: through-hole

8 : 장공8: long

본 발명은 열교환기의 헤더를 제조함에 있어서, 판재(1)상태의 소재 양단에 결합부(2)를 형성하고 상기 판재(1)의 양단에는 절개부(3)를 형성하여 배플 설치부(4)를 형성한 상태에서 상기 판재(1)에 여러 개의 튜브 삽입을 위한 절결부(5)를 형성하며, 상기한 상태에서 상기 판재(1)를 롤포밍하여 원형으로 형성하고, 상기 판재(1)를 원형으로 형성한 상태에서 이를 사용길이에 따라 일정한 길이로 절단한 다음, 상기 절결부(5)를 버링하여 튜브 삽입공(6)을 형성하며, 이의 일방에는 냉매유입관과 유출관을 결합하는 통공(7)을 형성하고 상기 판재(1)의 양단 결합부(2)를 접합하여 헤더를 제조하도록 구성한 것이다.In the present invention in the manufacture of the header of the heat exchanger, the coupling portion (2) is formed on both ends of the material in the state of the plate material (1) and the cutout portion (3) is formed on both ends of the plate material (1) baffle mounting portion (4) In the state of forming a) to form a cutout portion 5 for inserting a number of tubes in the plate 1, in the above state by forming the plate (1) in a circular shape, the plate (1) After cutting it to a certain length according to the use length in the state formed in a circular shape, the burring portion (5) is formed to form a tube insertion hole (6), one side of which combines the refrigerant inlet pipe and the outlet pipe The through hole 7 is formed, and both ends of the plate member 1 are joined to each other to produce a header.

또, 상기 튜브 삽입공(6)을 형성하는 절결부(5)에는 버링공구가 삽입될 수 있도록 비교적 넓게 장공(8)을 형성하여 구성한 것이다.In addition, the cutout portion 5 forming the tube insertion hole 6 is configured to form a long hole (8) relatively wide so that the burring tool can be inserted.

이상과 같이 구성된 본 발명은 상기 열교환기의 헤더를 제조함에 있어서,판재(1)상태의 소재 양단에 결합부(2)를 프레스 가공하여 양단을 판재의 두께 상태로 접합할 수 있도록 형성하고 상기 판재(1)의 양단에는 배플을 설치할 수 있도록 양분된 절개부(3)를 형성하여 배플 설치부(4)를 형성하며, 상기 판재(1)의 중앙부에는 여러 개의 튜브 삽입을 위한 절결부(5)를 프레스 가공하고, 상기한 상태에서 상기 판재(1)를 롤포밍하여 원형으로 형성하며, 상기 원형으로 형성한 판재(1)를 사용길이에 따라 일정한 길이로 절단시킨다.In the present invention configured as described above in the manufacture of the header of the heat exchanger, by forming a joining portion (2) on both ends of the material in the state of the plate material (1) so that both ends can be joined in the thickness state of the plate and the plate material Both ends of (1) form a cutout portion (3) bisected to install a baffle to form a baffle mounting portion (4), and a cutout portion (5) for inserting several tubes in the central portion of the plate (1) Press-processing, and roll-form the plate member 1 in the above state to form a circular shape, the plate member 1 formed in the circular shape is cut to a constant length depending on the length of use.

상기 절단된 소재의 상기 절결부(5)는 버링공구를 이용하여 버링하므로써 튜브 삽입공(6)을 형성하며, 이 튜브 삽입공(6)에는 냉매 튜브를 삽입할 수 있도록 하고 사이 절결부(5)의 일방에는 냉매가 헤더로 유입되는 유입관과 유출되는 유출관을 결합하는 통공(7)을 드릴링작업으로 형성한 다음, 상기 롤포밍되어 원형으로 형성된 판재(1)의 양단 결합부(2)를 접합하여 헤더를 제조하도록 구성한 것이다.The cutout portion 5 of the cut material forms a tube inserting hole 6 by burring using a burring tool, and allows the refrigerant tube to be inserted into the tube inserting hole 6 and cuts between the cutouts 5. In one side of the) the through-hole (7) for coupling the inlet pipe and the outlet pipe flowing out the refrigerant flowing into the header by a drilling operation, and then coupled to both ends of the rolled formed circular plate (1) (2) It is configured to produce a header by bonding.

또, 상기 튜브 삽입공(6)을 형성하는 절결부(5)에는 버링공구가 삽입될 수 있도록 비교적 넓게 장공(8)을 형성하게 되면, 상기 버링작업을 보다 효율적으로 할 수 있게 되고, 상기와 같은 방법으로 헤더를 제조한 상태에서 상기 튜브 삽입공(6)을 통하여 튜브를 결합시키면서 이 튜브들의 사이에 방열핀을 설치하며, 상기 절개부(3)에 의하여 형성된 배플 설치부(4)에는 배플을 설치하여 콘덴서 등의 코어를 완성하도록 한 것이다.In addition, when the long hole 8 is formed in the cutout portion 5 forming the tube insertion hole 6 relatively broadly so that a burring tool can be inserted, the burring operation can be performed more efficiently. In the same manner, while the header is manufactured in a state in which the tube is coupled through the tube insertion hole (6), the heat dissipation fins are installed between the tubes, and the baffle mounting portion (4) formed by the cutout (3) It is installed to complete cores such as capacitors.

이상과 같은 본 발명은 상기와 같이 판재로된 소재에 튜브를 삽입시키기 위한 튜브 삽입공과 배플 설치부 및 냉매의 유출입관을 프레스 가공으로 형성한 상태에서 이를 롤포밍하여 헤더를 제조하도록 하므로써 상기 헤더를 한번의 공정으로 제조할 수 있게 되며, 상기 롤포밍으로 제조된 헤더에 상기 냉매 튜브와 배플 및 유출입관을 용이하게 결합할 수 있고, 상기 헤더의 제조공정을 단순화시키면서 리크 발생을 방지할 수 있게 되며 헤더의 제조공수를 크게 줄이면서 생산성을 향상시키면서 열교환기의 냉매순환이 원활히 이루어지도록 하는 점등의 특징을 지닌 것이다.The present invention as described above is to form a header by forming a tube inserting hole and a baffle mounting portion for inserting the tube into the plate material as described above and the outlet flow pipe of the refrigerant by press forming to form the header It is possible to manufacture in a single process, it is possible to easily combine the refrigerant tube, the baffle and the outflow pipe to the header formed by the roll forming, it is possible to prevent the occurrence of leakage while simplifying the manufacturing process of the header It has the characteristic of lighting to make the refrigerant circulation of the heat exchanger smoothly while improving the productivity while significantly reducing the manufacturing labor of the header.

Claims (3)

열교환기의 헤더를 제조함에 있어서, 판재(1)상태의 소재 양단에 결합부(2)를 형성하고 상기 판재(1)의 양단에는 절개부(3)를 형성하여 배플 설치부(4)를 형성한 상태에서 상기 판재(1)에 여러 개의 튜브 삽입을 위한 절개부(5)를 형성하며, 상기한 상태에서 상기 판재(1)를 롤포밍하여 원형으로 형성하고, 상기 원형으로 형성한 판재(1)를 사용길이에 따라 일정한 길이로 절단한 다음, 상기 절결부(5)를 버링하여 튜브 삽입공(6)을 형성하며, 이의 일방에는 냉매유입관과 유출관을 결합하는 통공(7)을 형성하고 상기 판재(1)의 양단 결합부(2)를 접합하여 헤더를 제조하도록 함을 특징으로 하는 열교환기의 헤더 제조방법.In manufacturing the header of the heat exchanger, the coupling part 2 is formed at both ends of the material in the state of the plate 1, and the cutout 3 is formed at both ends of the plate 1 to form the baffle mounting part 4. A cutout portion 5 for inserting a plurality of tubes is formed in the plate 1 in one state. In the above state, the plate 1 is roll-formed to form a circle, and the plate plate 1 is formed in a circle. ) Is cut to a certain length according to the length of use, and then burring the cutout portion 5 to form a tube inserting hole 6, one side of which forms a through hole 7 for combining the refrigerant inlet pipe and the outlet pipe. And joining both ends of the plate member 1 to produce a header. 제1항에 있어서, 상기 튜브 삽입공(6)을 형성하는 절결부(5)에는 버링공구가 삽입될 수 있도록 비교적 넓게 장공(8)을 형성함을 특징으로 하는 열교환기의 헤더 제조방법.The method according to claim 1, wherein the cutout portion (5) forming the tube insertion hole (6) is formed with a long hole (8) relatively wide so that a burring tool can be inserted. 열교환기의 헤더를 구성함에 있어서, 판재(1)상태의 소재 양단에 결합부(2)를 형성하고 상기 판재(1)의 양단에는 절개부(3)를 형성하여 배플 설치부(4)를 형성하며 상기 판재(1)에 여러 개의 튜브 삽입을 위한 절결부(5)를 형성하여 상기 판재(1)를 롤포밍하여 원형으로 형성하고, 상기 절결부(5)는 롤포밍상태에서 버링하여 튜브 삽입공(6)을 형성하며, 이의 일방에는 냉매유입관과 유출관을 결합하는통공(7)을 형성하고 상기 판재(1)의 양단 결합부(2)를 접합하여 헤더가 이루어지도록 구성함을 특징으로 하는 열교환기의 헤더.In constructing the header of the heat exchanger, coupling portions 2 are formed at both ends of the material in the state of the plate 1, and cutouts 3 are formed at both ends of the plate 1 to form the baffle mounting portion 4. And forming a cutout portion 5 for inserting a plurality of tubes in the plate member 1 to form a circular shape by roll forming the plate member 1, and the cutout part 5 is burring in a roll forming state to insert a tube. The ball 6 is formed, and one side thereof forms a through hole 7 for coupling the refrigerant inlet pipe and the outflow pipe, and joins both ends of the plate member 1 to form a header. Heat exchanger header.
KR1020010052143A 2001-08-28 2001-08-28 Header of heat exchanger and method of manufacture KR20030018423A (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101055067B1 (en) * 2007-12-07 2011-08-05 주식회사 두원공조 Car heater cores

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH05277714A (en) * 1993-02-12 1993-10-26 Showa Alum Corp Production of heat exchanger
JPH1073389A (en) * 1996-08-29 1998-03-17 Zexel Corp Header pipe for heat exchanger
JPH1089883A (en) * 1996-09-17 1998-04-10 Zexel Corp Header pipe for heat exchanger and manufacturing device therefor
KR20000032684A (en) * 1998-11-17 2000-06-15 황한규 Method of manufacturing header tank for heat exchanger

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH05277714A (en) * 1993-02-12 1993-10-26 Showa Alum Corp Production of heat exchanger
JPH1073389A (en) * 1996-08-29 1998-03-17 Zexel Corp Header pipe for heat exchanger
JPH1089883A (en) * 1996-09-17 1998-04-10 Zexel Corp Header pipe for heat exchanger and manufacturing device therefor
KR20000032684A (en) * 1998-11-17 2000-06-15 황한규 Method of manufacturing header tank for heat exchanger

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101055067B1 (en) * 2007-12-07 2011-08-05 주식회사 두원공조 Car heater cores

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