KR20110037773A - Heat exchanger - Google Patents

Heat exchanger Download PDF

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Publication number
KR20110037773A
KR20110037773A KR1020090095336A KR20090095336A KR20110037773A KR 20110037773 A KR20110037773 A KR 20110037773A KR 1020090095336 A KR1020090095336 A KR 1020090095336A KR 20090095336 A KR20090095336 A KR 20090095336A KR 20110037773 A KR20110037773 A KR 20110037773A
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KR
South Korea
Prior art keywords
tube
fixing plate
heat exchanger
tubes
tube fixing
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Application number
KR1020090095336A
Other languages
Korean (ko)
Inventor
신현길
민명기
Original Assignee
주식회사 경동나비엔
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Application filed by 주식회사 경동나비엔 filed Critical 주식회사 경동나비엔
Priority to KR1020090095336A priority Critical patent/KR20110037773A/en
Priority to PCT/KR2010/006741 priority patent/WO2011043563A2/en
Publication of KR20110037773A publication Critical patent/KR20110037773A/en

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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
    • F28D1/00—Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators
    • F28D1/02—Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators with heat-exchange conduits immersed in the body of fluid
    • F28D1/04—Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators with heat-exchange conduits immersed in the body of fluid with tubular conduits
    • F28D1/053—Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators with heat-exchange conduits immersed in the body of fluid with tubular conduits the conduits being straight
    • F28D1/0535—Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators with heat-exchange conduits immersed in the body of fluid with tubular conduits the conduits being straight the conduits having a non-circular cross-section
    • F28D1/05366—Assemblies of conduits connected to common headers, e.g. core type radiators
    • F28D1/05391—Assemblies of conduits connected to common headers, e.g. core type radiators with multiple rows of conduits or with multi-channel conduits combined with a particular flow pattern, e.g. multi-row multi-stage radiators
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
    • F24H1/00—Water heaters, e.g. boilers, continuous-flow heaters or water-storage heaters
    • F24H1/22—Water heaters other than continuous-flow or water-storage heaters, e.g. water heaters for central heating
    • F24H1/40—Water heaters other than continuous-flow or water-storage heaters, e.g. water heaters for central heating with water tube or tubes
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
    • F28D1/00—Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators
    • F28D1/02—Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators with heat-exchange conduits immersed in the body of fluid
    • F28D1/04—Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators with heat-exchange conduits immersed in the body of fluid with tubular conduits
    • F28D1/0408—Multi-circuit heat exchangers, e.g. integrating different heat exchange sections in the same unit or heat exchangers for more than two fluids
    • F28D1/0417—Multi-circuit heat exchangers, e.g. integrating different heat exchange sections in the same unit or heat exchangers for more than two fluids with particular circuits for the same heat exchange medium, e.g. with the heat exchange medium flowing through sections having different heat exchange capacities or for heating/cooling the heat exchange medium at different temperatures
    • 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
    • F28F1/32—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 the means having portions engaging further tubular elements
    • 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
    • F28F9/02—Header boxes; End plates
    • F28F9/0202—Header boxes having their inner space divided by partitions
    • F28F9/0204—Header boxes having their inner space divided by partitions for elongated header box, e.g. with transversal and longitudinal partitions
    • F28F9/0209—Header boxes having their inner space divided by partitions for elongated header box, e.g. with transversal and longitudinal partitions having only transversal partitions
    • 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
    • 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
    • F28F9/182—Arrangements for sealing elements into header boxes or end plates by permanent joints, e.g. by rolling by welding the heat-exchange conduits having ends with a particular shape, e.g. deformed; the heat-exchange conduits or end plates having supplementary joining means, e.g. abutments
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
    • F24H1/00—Water heaters, e.g. boilers, continuous-flow heaters or water-storage heaters
    • F24H1/48—Water heaters for central heating incorporating heaters for domestic water
    • F24H1/52—Water heaters for central heating incorporating heaters for domestic water incorporating heat exchangers for domestic water
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F2275/00—Fastening; Joining
    • F28F2275/04—Fastening; Joining by brazing
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F2275/00—Fastening; Joining
    • F28F2275/06—Fastening; Joining by welding

Abstract

PURPOSE: A heat exchanger is provided to improve the durability and corrosion-resistance of the heat exchanger and to improve welding strength. CONSTITUTION: A heat exchanger comprises multiple tubes(110) and tube fixing plates(120). Hot water passes through the inside the tubes. The tubes are installed to be parallel to each other. The tube fixing plates are coupled to both ends of the tubes and fix the tubes at uniform intervals. Multiple slot type fixing holes(130) are formed in the tube fixing plates. The fixing holes correspond to the shape of the tubes. Protrusions(125) are formed in the edges of the fixing holes. The outer surfaces of the protrusions are contact with the inner sides of the tubes. The ends of the tubes are contact with the flat parts of the tube fixing plates.

Description

열교환기{HEAT EXCHANGER}Heat exchanger {HEAT EXCHANGER}

본 발명은 열교환기에 관한 것으로서, 더욱 상세하게는 열교환 튜브와 튜브고정판 간의 연결부 및 튜브고정판과 유로캡 간의 연결부에서의 용접면적을 증대시켜 튜브 연결부분을 보다 견고하게 고정시킴과 아울러 튜브 간의 간격을 최소화시켜 튜브의 전열면적을 증대시킴으로써 열교환 효율을 극대화할 수 있도록 하는 열교환기에 관한 것이다.The present invention relates to a heat exchanger, and more particularly, to increase the welding area at the connection portion between the heat exchange tube and the tube fixing plate and the connection portion between the tube fixing plate and the flow cap to fix the tube connection portion more firmly and minimize the gap between the tubes. It relates to a heat exchanger to maximize the heat exchange efficiency by increasing the heat transfer area of the tube.

주지하는 바와 같이 연소실 내에서 열교환 튜브 내부를 따라 흐르는 난방수를 버너를 이용하여 가열할 수 있는 구성을 가진 연소기기에는 크게 보일러와 온수기 등을 들 수 있다.As is well known, a combustion apparatus having a configuration capable of heating a heating water flowing along an inside of a heat exchange tube in a combustion chamber by using a burner may include a boiler and a water heater.

즉, 일반 가정이나 공공건물 등에 사용되는 보일러는 난방용이나 온수용으로 이용되고, 온수기는 냉수를 단시간 내에 소정의 온도로 가열하여 사용자가 편리하게 온수를 사용할 수 있도록 하는 것이다.That is, a boiler used in a general home or a public building is used for heating or hot water, and a water heater heats cold water to a predetermined temperature within a short time so that a user can conveniently use hot water.

이러한 보일러 및 온수기와 같은 연소기기는 대부분 기름 혹은 가스를 연료로 사용하여 버너를 통해 연소시킨 다음, 이 연소과정에서 발생하는 연소열을 이용하여 물을 가열하고, 이 가열된 온수를 사용자의 필요에 따라 제공할 수 있는 시스 템을 가지고 있다.Most combustors such as boilers and water heaters use oil or gas as fuel to combust through a burner, and then heat water using combustion heat generated during the combustion process, and the heated water is used according to a user's needs. I have a system that I can provide.

상기와 같은 연소기기에는 버너로부터 발생한 연소열을 흡수하기 위하여 열교환기가 구비되어 있는데, 종래부터 열교환기의 열전달 효율을 향상시키기 위한 다양한 방법들이 제안되어 왔다.Such a combustion apparatus is provided with a heat exchanger to absorb the heat of combustion generated from the burner, and various methods have been proposed to improve the heat transfer efficiency of the heat exchanger.

일반적인 열교환기는 상하로 일정간격 이격되어 서로 평행하게 나란히 배치되어 열교환 유체가 유입되거나 배출되는 한 쌍의 헤드탱크와, 상기 한 쌍의 헤드탱크 사이에 튜브고정판에 의해 연결되는 다수의 튜브와, 상기 튜브들 사이에 설치되어 튜브의 내부를 통과하는 유체로의 전열면적을 향상시키기 위한 전열핀을 포함한다.A common heat exchanger is a pair of head tanks spaced up and down spaced parallel to each other and the heat exchange fluid is introduced or discharged, and a plurality of tubes connected between the pair of head tanks by a tube fixing plate, and the tube And a heat transfer fin installed between the heat sinks to improve heat transfer area to the fluid passing through the inside of the tube.

상기 튜브고정판에는 펀칭에 의해 다수의 고정구멍이 형성되고, 상기 고정구멍에 튜브의 일단부가 끼워지며, 고정구멍과 튜브 사이를 용접함으로써 튜브고정판에 튜브를 고정하는 구조로 이루어져 있다.A plurality of fixing holes are formed in the tube fixing plate by punching, one end of the tube is fitted into the fixing hole, and the tube fixing plate is fixed to the tube fixing plate by welding between the fixing holes and the tube.

도 1은 종래 튜브에 전열핀이 구비된 열교환기의 단면도, 도 2는 종래 원형 튜브를 사용한 열교환기의 사시도이다.1 is a cross-sectional view of a heat exchanger equipped with a heating fin in a conventional tube, and FIG. 2 is a perspective view of a heat exchanger using a conventional round tube.

도 1을 참조하면, 종래 튜브(1)에 전열핀(2)이 구비된 열교환기의 경우 튜브고정판(3)에 튜브(1)의 양단이 일정간격으로 고정되고, 튜브고정판(3)의 외측에는 난방수의 유로를 구분하는 유로캡(4)이 구비된 구조로 이루어져 있으며, 이러한 열교환기는 튜브(1)에 다수의 전열핀(2)이 구비되어 열전달이 이루어지므로 튜브(3) 간의 간격이 비교적 크게 구성된다.Referring to FIG. 1, in the case of a heat exchanger equipped with a heating fin 2 in a conventional tube 1, both ends of the tube 1 are fixed to the tube fixing plate 3 at regular intervals, and the outside of the tube fixing plate 3 is fixed. The heat exchanger is composed of a structure having a flow path cap (4) for separating the flow path of the heating water, such a heat exchanger is provided with a plurality of heat transfer fins (2) in the tube (1), so that the gap between the tubes (3) It is relatively large.

도 2를 참조하면, 종래 원형 튜브(5)를 사용한 열교환기의 경우 튜브고정 판(6)에 원형 튜브(5)가 지그재그로 고정되어 전열면적이 넓어지도록 구성됨으로써 튜브(5) 내부를 흐르는 난방수에 저항을 주어 열효율을 상승시키는 구조로 이루어져 있다. Referring to FIG. 2, in the case of a heat exchanger using the conventional circular tube 5, the circular tube 5 is fixed to the tube fixing plate 6 in a zigzag manner so that the heat transfer area is widened, thereby heating the inside of the tube 5. It is composed of structure that raises thermal efficiency by resisting water.

여기서, 열교환기의 내구성을 향상시키고 제작비를 절감하기 위해서는 튜브고정판과 튜브 간의 연결구조를 어떻게 구성하는지가 매우 중요하다.Here, how to configure the connection structure between the tube fixing plate and the tube is very important to improve the durability of the heat exchanger and reduce the manufacturing cost.

도 3 내지 도 6은 종래 열교환기의 튜브 연결구조를 예시한 단면도이다.3 to 6 are cross-sectional views illustrating a tube connection structure of a conventional heat exchanger.

도 3에 따른 튜브 연결구조는 상기와 같이 튜브(10)를 고정하기 위해서 튜브고정판(12)에 펀칭으로 튜브(10)가 끼워질 수 있는 고정구멍(14)을 형성한 다음에, 이 고정구멍(14)에 튜브(10)를 끼우고, 고정구멍(14)의 가장자리와 튜브(10)를 용접하여 고정하게 된다.The tube connecting structure according to FIG. 3 forms a fixing hole 14 into which the tube 10 can be fitted by punching the tube fixing plate 12 to fix the tube 10 as described above, and then the fixing hole. The tube 10 is inserted in the 14 and the edge of the fixing hole 14 and the tube 10 are welded and fixed.

이러한 연결구조에 의하면, 튜브(10)와 튜브고정판(12) 간의 용접부위(W)의 면적이 튜브고정판(12)의 두께에 의해 결정되는데, 튜브고정판(12)의 두께가 얇게 되면 용접면적이 작아서 튜브(10)와 튜브고정판(12)의 용접부위(W)가 쉽게 떨어지게 되어 내구성이 떨어지는 문제점이 있다.According to this connection structure, the area of the welding portion W between the tube 10 and the tube fixing plate 12 is determined by the thickness of the tube fixing plate 12. When the thickness of the tube fixing plate 12 becomes thin, the welding area is reduced. Small weld portion (W) of the tube 10 and the tube fixing plate 12 is easy to fall there is a problem that the durability is poor.

이러한 문제를 방지하기 위하여 도 4에 도시된 바와 같이 튜브고정판(22)의 두께를 두껍게 형성할 경우에는 고정구멍(24)을 형성하기 위해서 펀칭을 하면 튜브(20)가 끼워져 접촉되는 고정구멍(24)의 내주면에 파단면(26)이 발생되어 용접성이 떨어지는 문제점이 있다.In order to prevent such a problem, as shown in FIG. 4, when the thickness of the tube fixing plate 22 is formed to be thick, when the punching is performed to form the fixing hole 24, the fixing hole 24 is inserted into contact with the tube 20. There is a problem that the fracture surface 26 is generated on the inner circumferential surface of the) and the weldability is poor.

또한, 도 5에 도시된 바와 같이 튜브고정판(32)에 버링(Burring)가공으로 고 정구멍(34)을 형성하고, 고정구멍(34)의 가장자리에 형성된 돌출부(33,Burr)의 내측에 튜브(30)를 끼워서 용접으로 고정하는 구조에 의하면, 도 3과 도 4에 도시된 연결구조에서 튜브(10,20)의 내경(D1) 및 튜브(10,20) 사이의 간격(d1)과 비교할 때, 도 5에 도시된 연결구조에서는 튜브(30)의 내경(D2)은 감소하고 튜브(30) 사이의 간격(d2)은 더 벌어지게 되어 열전달 효율이 떨어지는 문제점이 있다. In addition, as shown in FIG. 5, a fixing hole 34 is formed in the tube fixing plate 32 by a burring process, and a tube is formed inside the protrusion 33 (Burr) formed at the edge of the fixing hole 34. According to the structure in which 30 is inserted and fixed by welding, the connection structure shown in FIGS. 3 and 4 can be compared with the inner diameter D1 of the tubes 10 and 20 and the distance d1 between the tubes 10 and 20. At this time, in the connection structure shown in Figure 5, the inner diameter (D2) of the tube 30 is reduced and the distance (d2) between the tube 30 is wider, there is a problem that the heat transfer efficiency is lowered.

또한, 도 5에 도시된 연결구조에서는 도 3과 도 4에 도시된 연결구조에 비해 용접면적이 넓어져 용접 강도를 상대적으로 향상시킬 수는 있지만, 돌출부(33)의 내측면과 튜브(30)의 외측면 사이에서만 용접이 이루어지므로 견고하게 고정시키는데는 일정한 한계가 있는 문제점이 있다.In addition, in the connection structure shown in FIG. 5, the welding area is wider than that of the connection structure shown in FIGS. 3 and 4, so that the welding strength may be relatively improved. Since welding is made only between the outer surfaces of the, there is a problem that there is a certain limit to firmly fixed.

또한, 도 6에 도시된 바와 같이 원형 튜브(40)를 사용하는 열교환기 중 튜브연결부에서 고정구멍(44)과 튜브(40) 간의 동심도를 맞추기 위해 버링을 테이퍼지게 가공하여 적용한 경우에는 튜브고정판(42)의 돌출부(43)의 외측에 튜브(40)를 끼워 용접하게 되는 구조로 이루어져, 튜브(40)의 내경을 크게 할 수는 있으나, 용접부위(W)가 선접촉되는 부위로 제한되므로 용접 강도가 현저히 떨어지는 문제점이 있다.In addition, as shown in FIG. 6, in order to match the concentricity between the fixing hole 44 and the tube 40 at the tube connection part of the heat exchanger using the circular tube 40, the burring is applied to the tube fixing plate ( It is made of a structure to weld the tube 40 to the outside of the protrusion 43 of the 42, the inner diameter of the tube 40 can be increased, but the welding portion (W) is limited to the site where the line contact is welded There is a problem that the strength is significantly reduced.

한편, 본 출원인의 선출원 열교환기(출원번호:10-2008-47735)에는 돌출부(버,burr)의 외측에 튜브가 끼워져 돌출부의 외측면과 튜브의 내측면 간의 접촉면에 브레이징 용접으로 고정하는 구조가 개시되어 있으나, 이러한 튜브 연결구조는 튜브의 끝단부와 튜브고정판 간의 연결부를 고정시킬 수 있는 구성이 미비하여 튜브를 견고하게 고정시키는데 한계가 있는 문제점이 있었다.On the other hand, the applicant's prior application heat exchanger (application number: 10-2008-47735) has a structure in which a tube is fitted to the outside of the protrusion (burr) to be fixed to the contact surface between the outer surface of the protrusion and the inner surface of the tube by brazing welding. Although disclosed, such a tube connection structure has a problem in that there is a limitation to firmly fix the tube because the configuration that can fix the connection between the end of the tube and the tube fixing plate is insufficient.

이하에서는 상기 튜브 연결구조 중에서 도 5에서 설명된 튜브 연결구조를 적용하여 열교환기를 제작할 경우의 문제점을 도 7를 참조하여 설명한다.Hereinafter, a problem when the heat exchanger is manufactured by applying the tube connection structure described in FIG. 5 among the tube connection structures will be described with reference to FIG. 7.

열교환기는 튜브고정판(32)의 외측으로 튜브(30)의 내부를 통과하는 난방수의 유로를 구분하고 열교환기의 외부로부터 열교환기 내부 유로를 밀폐하기 위한 복수의 유로캡(50a,50b)이 설치된다.The heat exchanger is provided with a plurality of flow path caps 50a and 50b for separating the flow path of the heating water passing through the inside of the tube 30 to the outside of the tube fixing plate 32 and for sealing the heat exchanger internal flow path from the outside of the heat exchanger. do.

상기 유로캡(50a,50b)은 동일방향의 유로를 형성하는 일군의 튜브(30)의 외측을 둘러싸도록 일정간격으로 설치된다.The flow path caps 50a and 50b are installed at regular intervals so as to surround the outside of the group of tubes 30 forming the flow path in the same direction.

여기서, 상기 유로캡(50a,50b) 간의 연결부(50c)는 튜브고정판(32)에 맞닿아 용접으로 조립되는데, 상기 연결부(50c)와 맞닿는 튜브고정판(32)의 면적을 넓게 하면 용접면적이 넓어져 보다 견고한 용접이 가능하겠지만, 이 경우에는 튜브(30) 사이의 간격이 그만큼 벌어지게 되어 열교환 면적이 감소되는 문제점 있다.Here, the connecting portion 50c between the flow path caps 50a and 50b is assembled by welding in contact with the tube fixing plate 32. When the area of the tube fixing plate 32 in contact with the connecting portion 50c is widened, the welding area is widened. Although it may be possible to weld more firmly, in this case, the gap between the tubes 30 is increased so that the heat exchange area is reduced.

그리고, 도 5에 따른 튜브 연결구조에서 튜브(30) 사이의 간격을 좁게 구성할 경우에, 만일 도 7에 도시된 바와 같이 튜브(30)의 끝단부가 튜브고정판(32)의 뒤쪽으로 튀어나온다면 상기 유로캡(50a,50b)의 연결부(50c)와 맞닿게 되는 튜브고정판(32) 부위가 편평하게 형성되지 못하여 연결부(50c)와 튜브(30) 간에 간섭이 발생되므로 용접 강도가 떨어지게 되는 문제점이 있다.And, in the tube connecting structure according to Figure 5 in the narrow configuration between the tube 30, if the end of the tube 30 as shown in Figure 7 protrudes to the rear of the tube fixing plate 32 Since the tube fixing plate 32, which is in contact with the connecting portions 50c of the flow path caps 50a and 50b, is not formed flat, interference occurs between the connecting portion 50c and the tube 30, thereby reducing the welding strength. have.

또한, 이러한 연결구조에서 용접강도가 저하되는 문제점을 방지하기 위해서는 튜브(30)의 끝단부를 튜브고정판(32)과 동일한 높이가 되도록 정밀하게 조립해야 하므로 다수의 튜브(30)를 일일이 설치함에 있어서 그 조립작업이 용이하지 않 은 문제점이 있다.In addition, in order to prevent the problem that the welding strength is lowered in such a connection structure, the end of the tube 30 must be precisely assembled to be the same height as the tube fixing plate 32, so that the installation of a plurality of tubes 30 There is a problem that assembly is not easy.

따라서, 유로캡(50a,50b)의 연결부(50c)와 튜브고정판(32) 외측면 간의 용접면적을 충분히 확보하면서도 튜브(30) 사이의 간격이 최소화되도록 하여 열전달 효율을 향상시킬 수 있는 튜브 연결구조를 구비한 열교환기의 개발이 요구되는 상황이다.Therefore, the tube connection structure that can improve the heat transfer efficiency by minimizing the gap between the tube 30 while ensuring a sufficient welding area between the connecting portion 50c of the flow path cap (50a, 50b) and the outer surface of the tube fixing plate 32 The situation is required to develop a heat exchanger having a.

본 발명은 상기와 같은 문제점을 해결하기 위하여 안출된 것으로서, 열교환 튜브와 튜브고정판 간의 연결부 및 튜브고정판과 유로캡 간의 연결부를 견고하게 고정시킬 수 있는 열교환기를 제공함에 그 목적이 있다.The present invention has been made to solve the above problems, an object of the present invention is to provide a heat exchanger that can firmly secure the connection between the heat exchange tube and the tube fixing plate and the connection between the tube fixing plate and the flow path cap.

본 발명의 또 다른 목적은, 한정된 면적의 튜브고정판에 연결되는 튜브의 전열면적을 증대시켜 열교환 효율을 향상시킬 수 있도록 하는 열교환기를 제공함에 그 목적이 있다.It is still another object of the present invention to provide a heat exchanger capable of increasing heat transfer area of a tube connected to a tube fixing plate having a limited area to improve heat exchange efficiency.

상술한 바와 같은 목적을 구현하기 위한 본 발명의 열교환기는, 난방수가 내부를 통과하고 연소가스와 접촉되는 변의 폭이 높이에 비해 큰 장공형의 단면을 가지며 서로 평행하도록 일정 간격으로 나란하게 설치되는 복수의 튜브;및 상기 튜브의 양측 끝단에 결합되어, 상기 튜브가 일정 간격으로 고정되는 튜브고정판;을 포함하는 열교환기에 있어서, 상기 튜브고정판에는 상기 튜브 형상에 대응되는 다수의 장공형 고정구멍이 형성됨과 동시에 상기 고정구멍의 가장자리에는 상기 튜브가 연결되는 쪽으로 돌출부가 수직으로 형성되어, 상기 돌출부의 외측에 상기 튜브의 내측이 접촉되고, 상기 튜브의 끝단부가 상기 튜브고정판의 평탄부에 접촉된 것을 특징으로 한다.The heat exchanger of the present invention for realizing the above object has a plurality of sidewalls arranged side by side at regular intervals so that the width of the side where the heating water passes through and the width of the side in contact with the combustion gas is larger than the height and parallel to each other. And a tube fixing plate coupled to both ends of the tube, wherein the tube fixing plate is fixed at regular intervals, wherein the tube fixing plate is provided with a plurality of long hole fixing holes corresponding to the tube shape. At the same time, the projection is formed vertically at the edge of the fixing hole toward the tube connection, the inner side of the tube is in contact with the outside of the protrusion, the end of the tube is in contact with the flat portion of the tube fixing plate do.

상기 튜브고정판의 고정구멍의 가장자리에 수직으로 형성된 돌출부는 버링 가공에 의한 것을 특징으로 한다.The protrusion formed perpendicular to the edge of the fixing hole of the tube fixing plate is characterized by the burring process.

상기 돌출부의 외측과 상기 튜브의 내측 사이에서 브레이징이 되는 것을 특징으로 한다.It is characterized in that the brazing between the outer side of the protrusion and the inner side of the tube.

상기 튜브의 끝단부와 상기 튜브고정판의 평탄부 사이에서 브레이징이 되는 것을 특징으로 한다.It is characterized in that the brazing between the end of the tube and the flat portion of the tube fixing plate.

상기 튜브고정판의 외측에는 상기 튜브의 내부를 통과하는 난방수의 유로를 구분함과 아울러 열교환기 내부유로를 밀폐하기 위한 복수의 유로캡이 추가로 구비되고, 상기 유로캡 간의 연결부는 상기 튜브고정판 외측의 평탄부에 맞닿아 브레이징 용접으로 고정되는 것을 특징으로 한다.The outer side of the tube fixing plate is provided with a plurality of passage caps for separating the flow passage of the heating water passing through the inside of the tube and for sealing the inner passage of the heat exchanger, the connection portion between the passage caps outside the tube fixing plate The flat portion of the contact is characterized in that it is fixed by brazing welding.

본 발명에 따른 열교환기에 의하면, 열교환 튜브와 튜브고정판 간의 연결부 및 튜브고정판과 유로캡 간의 연결부에서의 용접면적을 넓게 확보할 수 있게 되어 용접 강도를 높일 수 있고, 열교환 튜브와 튜브고정판 간의 용접부위에 틈새가 생기지 않으므로 산성 성분의 응축수가 침투하거나 고이게 되는 것을 미연에 방지할 수 있게 되어 열교환기의 내식성과 내구성을 향상시킬 수 있는 장점이 있다.According to the heat exchanger according to the present invention, it is possible to secure a large welding area at the connection portion between the heat exchange tube and the tube fixing plate and the connection portion between the tube fixing plate and the flow path cap to increase the welding strength, and the gap between the heat exchange tube and the tube fixing plate in the welding portion. Since it is possible to prevent the condensate of the acidic component to penetrate or build up in advance, there is an advantage that can improve the corrosion resistance and durability of the heat exchanger.

또한, 본 발명에 의하면 장방형 튜브를 사용함에 따라 튜브고정판에 보다 많은 수의 튜브를 설치할 수 있게 되므로 전열면적이 증대되어 열교환 효율을 극대화할 수 있을 뿐만 아니라, 튜브 연결부분의 제조가 간편하고 튜브를 인접하게 제작할 수 있어 설계상의 제약을 감소시킬 수 있는 장점이 있다.In addition, according to the present invention, as the rectangular tube is used, a larger number of tubes can be installed on the tube fixing plate, thereby increasing the heat transfer area to maximize heat exchange efficiency, and simplifying the manufacture of the tube connection part. Since it can be manufactured adjacently, there is an advantage that can reduce the design constraints.

이하 첨부한 도면을 참조하여 본 발명의 바람직한 실시예에 대한 구성 및 작 용을 상세히 설명하면 다음과 같다. Hereinafter, the configuration and operation of the preferred embodiment of the present invention will be described in detail with reference to the accompanying drawings.

도 8은 본 발명에 따른 장공형 튜브를 사용한 열교환기의 분해 사시도, 도 9는 본 발명에 따른 열교환기의 튜브 연결구조를 보여주는 단면도, 도 10은 도 9의 튜브 연결구조에 유로캡이 설치된 모습을 보여주는 단면도이다. 8 is an exploded perspective view of a heat exchanger using an elongated tube according to the present invention, FIG. 9 is a sectional view showing a tube connection structure of the heat exchanger according to the present invention, and FIG. Is a cross-sectional view showing.

본 발명에 따른 열교환기(100)는 연소가스와 접촉되는 변의 폭이 높이에 비해 큰 장공형의 단면을 갖는 복수의 튜브(110)와, 상기 튜브(110)의 양측 끝단에 결합되어 상기 튜브(110)를 일정 간격으로 고정시키는 튜브고정판(120)을 포함한다.The heat exchanger 100 according to the present invention has a plurality of tubes 110 having a long hole cross section with a width of a side contacting the combustion gas compared with a height, and are coupled to both ends of the tube 110 so that the tube ( It includes a tube fixing plate 120 for fixing the 110 at regular intervals.

튜브고정판(120)에는 버링가공을 통해 튜브(110)의 형상에 대응되는 다수의 장공형 고정구멍(130)이 형성되고, 고정구멍(130)의 가장자리에는 버링가공을 통해 튜브(110)가 연결되는 쪽으로 돌출부(125)가 형성된다.The tube fixing plate 120 is formed with a plurality of long fixing holes 130 corresponding to the shape of the tube 110 through the burring process, the tube 110 is connected to the edge of the fixing hole 130 through the burring process The protrusion 125 is formed to be.

돌출부(125)는 고정구멍(130)의 가장자리에 형성된 튜브고정판(120)의 일부가 수직으로 절곡 형성된 것이다.The protrusion 125 is formed by bending a portion of the tube fixing plate 120 formed at the edge of the fixing hole 130 vertically.

튜브고정판(120)에 형성되는 다수의 고정구멍(130)의 가장자리에 돌출부(125)를 형성할 때, 다수의 돌출부(125)는 일정한 간격으로 형성되는데, 돌출부(125)의 외주로 튜브(110)가 끼워지도록 되어 있어, 돌출부(125)가 형성된 고정구멍(130)은 튜브(110)의 내경보다 작게 형성되는 것이 바람직하다.When the protrusions 125 are formed at the edges of the plurality of fixing holes 130 formed in the tube fixing plate 120, the plurality of protrusions 125 are formed at regular intervals, and the tube 110 is formed on the outer circumference of the protrusion 125. ) Is fitted so that the fixing hole 130 in which the protrusion 125 is formed is smaller than the inner diameter of the tube 110.

한편, 고정구멍(130)을 튜브고정판(120)에 펀칭으로 형성할 때, 여러번 타공하여 형성하면 튜브(110)가 연결되는 튜브고정판(120)이 타공에 의해 편평하게 유지되지 않아 튜브고정판(120)과 튜브(110) 사이의 용접성이 저하되기 때문에, 버링 가공시 단발 타공으로 다수의 고정구멍(130)을 성형하게 되는데, 고정구멍(130)의 성형시 타공에 의해 튜브고정판(120)이 변형되지 않는 고정구멍(130) 간의 간격 즉, 고정구멍(130)에 형성되는 돌출부(125) 간의 간격(h)이 일정하게 유지되도록 버링가공을 하게 된다.On the other hand, when the fixing hole 130 is formed in the tube fixing plate 120 by punching, if the hole is formed several times, the tube fixing plate 120 to which the tube 110 is connected is not held flat by the punching tube fixing plate 120 Since weldability between the tube and the tube 110 is reduced, a plurality of fixing holes 130 are formed by a single punch when burring, and the tube fixing plate 120 is deformed by the punching when forming the fixing holes 130. Burring processing is performed so that the interval h between the fixing holes 130 that is not fixed, that is, the interval h between the protrusions 125 formed in the fixing hole 130, is kept constant.

즉, 튜브고정판(120)에 튜브(110)를 고정하기 위한 고정구멍(130)들이 일정한 간격으로 형성되면, 고정구멍(130)에 형성된 돌출부(125)들도 일정한 간격(h)을 유지한 채로 형성된다. 여기서, 돌출부(125)의 외주에 끼워지는 튜브(120)들 사이의 간격을 d3, 튜브(120)의 두께를 t, 돌출부(125)의 두께를 T라고 하면, 튜브(120)들 사이의 간격(d3)은 식 d3=h-2t 로 나타낼 수 있다.That is, when the fixing holes 130 for fixing the tube 110 to the tube fixing plate 120 are formed at regular intervals, the protrusions 125 formed in the fixing holes 130 also maintain a constant interval h. Is formed. Here, d3, the thickness of the tube 120 is t, and the thickness of the protrusion 125 is T between the tubes 120 fitted on the outer circumference of the protrusion 125, and the interval between the tubes 120 is (d3) can be represented by the formula d3 = h-2t.

반면에, 종래의 도 5에 도시된 바와 같은 튜브 연결구조에서는 튜브(30)가 고정구멍(34)에 형성된 돌출부(33)의 내주에 끼워지기 때문에, 튜브(30)들 사이의 간격(d2)은 식 d2=h+2T 로 나타낼 수 있다.On the other hand, in the tube connecting structure shown in FIG. 5 of the related art, since the tube 30 is fitted to the inner circumference of the protrusion 33 formed in the fixing hole 34, the interval d2 between the tubes 30 is provided. Can be represented by the formula d2 = h + 2T.

즉, 본 발명에 따른 열교환기(100)에서는 튜브(110)들 사이의 거리가 종래에 비해 (d2-d3)=(2T+2t) 만큼 더 가까운 간격을 두고 형성됨을 알 수 있다.That is, in the heat exchanger 100 according to the present invention, it can be seen that the distance between the tubes 110 is formed at a distance closer by (d2-d3) = (2T + 2t) than in the prior art.

따라서, 본 발명에 따르면 동일한 크기의 튜브고정판(120)에 다수의 튜브(110)를 고정할 경우, 종래기술에 따른 열교환기와 비교하여 보다 더 많은 수의 장공형 튜브(110)를 설치할 수 있으므로 그만큼 열교환 면적이 넓어져 열교환기의 열교환 효율을 향상시킬 수 있게 된다.Therefore, according to the present invention, when fixing a plurality of tubes 110 to the tube fixing plate 120 of the same size, as compared to the heat exchanger according to the prior art it is possible to install a larger number of long hole tube 110 so Since the heat exchange area is wide, it is possible to improve the heat exchange efficiency of the heat exchanger.

한편, 본 발명에서는 튜브고정판(120)의 고정구멍(130) 가장자리에 돌출부(125)를 형성함에 있어서, 버링가공을 통해 튜브고정판(120) 내측의 평탄 부(120a)를 기준으로 튜브(110)를 향하는 방향으로 직각이 되도록 절곡형성하게 되므로, 돌출부(125)의 외측에 튜브(110)를 끼워 조립할 때, 튜브(110)의 내측면(110a)과 돌출부(125)의 외측면(125a)이 맞닿아 접촉됨과 동시에 튜브(110)의 끝단부(110b)와 튜브고정판(120) 내측의 평탄부(120a) 또한 맞닿게 되므로 서로 접촉되는 면 사이에는 빈틈없이 밀착된 상태로 접촉하게 된다.Meanwhile, in the present invention, in forming the protrusion 125 at the edge of the fixing hole 130 of the tube fixing plate 120, the tube 110 based on the flat portion 120a inside the tube fixing plate 120 through burring processing. Since it is bent to form a right angle in the direction toward, when assembling the tube 110 to the outside of the protrusions 125, the inner surface (110a) of the tube 110 and the outer surface (125a) of the protrusions 125 At the same time, the end portion 110b of the tube 110 and the flat portion 120a inside the tube fixing plate 120 also come into contact with each other, so that the surfaces in contact with each other are in close contact with each other.

이에 따라, 돌출부(125)의 외측으로 튜브(110)를 끼운 후에, 튜브(110)의 내측면(110a)과 돌출부(125)의 외측면(125a)이 맞닿는 접촉면 뿐만 아니라, 튜브(110)의 끝단부(110b)와 튜브고정판(120) 내측의 평탄부(120a)가 맞닿는 접촉면에서도 브레이징 용접으로 고정시킬 수 있게 되므로 용접면적이 넓어져 브레이징 용접 강도를 높일 수 있게 된다.Accordingly, after the tube 110 is inserted to the outside of the protrusion 125, not only the contact surface of the inner surface 110a of the tube 110 and the outer surface 125a of the protrusion 125 but also the contact surface of the tube 110. Since the end portion 110b and the flat portion 120a inside the tube fixing plate 120 can be fixed by brazing welding, the welding area can be increased to increase the brazing welding strength.

이렇게 돌출부(125)가 수직으로 가공되어 용접면에서의 기밀이 유지되는 구조에 의하면, 열교환기(100)가 산성의 응축수가 발생되는 환경(가스를 연료로 하는 경우 응축수의 pH는 약 3~4, 기름을 연료로 하는 경우 응축수의 pH는 약 2~3)에 적용되더라도 용접부위(W)에 모세관 현상 등에 의하여 응축수가 침투 또는 고이는 현상을 방지할 수 있게 되어 산성의 응축수로 인한 용접 부위의 부식을 방지할 수 있으며, 이에 따라 열교환기(100)의 내식성과 내구성을 향상시킬 수 있게 된다.According to the structure in which the protrusion 125 is vertically processed and airtightness is maintained at the weld surface, the pH of the condensate is about 3 to 4 when the heat exchanger 100 generates acidic condensate (when gas is used as a fuel). In case of using oil as fuel, even if the pH of condensate is applied to about 2 ~ 3), it is possible to prevent condensate from penetrating or swelling due to capillary phenomenon in welding area (W). It is possible to prevent, thereby improving the corrosion resistance and durability of the heat exchanger (100).

또한, 본 발명에서는 버링가공을 통해 튜브고정판(120)에 돌출부(125)를 수직으로 형성하여 튜브(110)를 돌출부(125)의 외측에 끼워 용접하게 되므로, 튜브(120)의 끝단부는 튜브고정판(120)의 내측 평탄부(120a)에 밀착되어 고정되며, 튜브(120)를 조립한 상태에서 튜브고정판(120)의 외측 평탄부(120b)는 편평한 구조 가 되므로 도 10에 도시된 바와 같이 유로캡(150a,150b)의 연결부(150c)를 고정할 수 있는 편평한 접촉면이 마련된다.In addition, in the present invention, since the protrusion 125 is formed vertically on the tube fixing plate 120 through the burring process, the tube 110 is inserted into the outside of the protrusion 125 to be welded, so that the end of the tube 120 has a tube fixing plate. The inner flat portion 120a of the 120 is tightly fixed and the outer flat portion 120b of the tube fixing plate 120 is assembled in a state where the tube 120 is assembled so that the flow path as shown in FIG. Flat contact surfaces are provided to fix the connecting portions 150c of the caps 150a and 150b.

즉, 본 발명의 열교환기(100)는 열교환 튜브(110)를 납짝한 장공형으로 구성하고 튜브(110) 간의 간격을 최소화하여 열교환 면적을 넓게 구성하면서도, 유로캡(150a,150b)의 연결부(150c)와 튜브고정판(120)의 외측 평탄부(120b) 간의 접촉면을 편평한 구조의 충분한 넓이를 갖도록 구성할 수 있게 된다.That is, the heat exchanger 100 of the present invention comprises a heat exchange tube 110 in the form of a flat long hole and minimizes the gap between the tubes 110 to widen the heat exchange area, while connecting portions of the flow path caps 150a and 150b ( The contact surface between the 150c) and the outer flat portion 120b of the tube fixing plate 120 can be configured to have a sufficient width of the flat structure.

도 11은 본 발명에 따른 열교환기의 전체 구성을 보여주는 단면도, 도 12는 도 11의 A-A 선 기준 단면도이다.11 is a cross-sectional view showing the overall configuration of a heat exchanger according to the present invention, Figure 12 is a cross-sectional view taken along the line A-A of FIG.

도 11에 도시된 바와 같이, 본 발명의 열교환기(100)는 난방수유입구(101)를 통해 유입된 난방수가 상하로 일정간격 이격되어 나란하게 배치된 복수의 장공형 튜브(110) 내부를 좌측에서 우측방향으로 또는 우측에서 좌측방향으로 유로를 전환하면서 통과하여 난방수유출구(102)를 통해 유출되는 과정에서 연소가스와의 접촉으로 열교환이 이루어지게 된다.As illustrated in FIG. 11, the heat exchanger 100 of the present invention has a left side inside a plurality of long hole tubes 110 arranged side by side with a predetermined interval spaced up and down by the heating water introduced through the heating water inlet 101. In the process of flowing out through the heating water outlet 102 to pass through while switching the flow path in the right direction or right to left in the heat exchange is made in contact with the combustion gas.

또한, 도 12에 도시된 바와 같이 본 발명의 열교환기(100)를 구성하는 튜브(110)는 장방형의 납짝한 단면을 갖도록 구성되어, 종래 전열핀이 구비된 열교환기와는 달리 전열면적을 넓게 확보하기 위해서 튜브(110) 간의 간격이 좁게 구성되고, 종래 원형 단면을 갖는 튜브 구조와 달리 튜브(110)가 일정 간격을 두고 서로 나란하게 설치되는 점에서 차이가 있다.In addition, the tube 110 constituting the heat exchanger 100 of the present invention, as shown in Figure 12 is configured to have a flat rectangular cross-section, unlike the heat exchanger with a conventional heat transfer fins ensures a large heat transfer area The gap between the tubes 110 is configured to be narrow, and unlike the conventional tube structure having a circular cross section, there is a difference in that the tubes 110 are installed side by side at a predetermined interval.

상술한 바와 같이 본 발명을 적용하여 열교환기를 제작하면, 튜브의 연결부 분을 보다 견고하게 고정할 수 있게 되고, 연결부위의 조립 방식이 간편하여 열교환기의 제조 시간과 비용을 줄일 수 있게 된다.When the heat exchanger is manufactured by applying the present invention as described above, the connection portion of the tube can be more firmly fixed, and the assembly method of the connection portion can be simplified to reduce the manufacturing time and cost of the heat exchanger.

또한, 종래 원형 튜브를 사용하여 열교환기를 제작할 경우, 튜브의 배열을 지그재그 형태로 구성하거나, 전열핀을 연결하는 등의 방법으로 열매체에 저항을 주어 열효율을 향상시킬 수 있지만, 본 발명과 같이 장공형 튜브를 설치하여 열교환기를 제작할 경우에는 상술한 튜브 연결구조를 적용함으로써 장공형 튜브를 인접하게 다수 설치할 수 있게 되어 열교환 효율을 더욱 향상시킬 수 있을 뿐만 아니라 조립의 용이성을 확보할 수 있게 된다.In addition, in the case of manufacturing a heat exchanger using a conventional round tube, the arrangement of the tube in a zigzag form, or by connecting the heating fins to give a resistance to the heat medium to improve the thermal efficiency, but the long hole type as in the present invention In the case of manufacturing a heat exchanger by installing a tube, by applying the above-described tube connection structure, a plurality of long holes may be installed adjacent to each other, thereby further improving heat exchange efficiency and assuring ease of assembly.

도 1은 종래 튜브에 전열핀이 구비된 열교환기의 단면도,1 is a cross-sectional view of a heat exchanger equipped with a heating fin in a conventional tube,

도 2는 종래 원형 튜브를 사용한 열교환기의 사시도,2 is a perspective view of a heat exchanger using a conventional round tube,

도 3 내지 도 6은 종래 열교환기의 튜브 연결구조를 예시한 단면도,3 to 6 is a cross-sectional view illustrating a tube connection structure of a conventional heat exchanger,

도 7은 도 5에 도시된 튜브 연결구조를 적용한 열교환기의 문제점을 설명하기 위한 단면도,7 is a cross-sectional view illustrating a problem of a heat exchanger to which the tube connecting structure shown in FIG. 5 is applied;

도 8은 본 발명에 따른 장공형 튜브를 사용한 열교환기의 분해 사시도,8 is an exploded perspective view of a heat exchanger using an elongated tube according to the present invention;

도 9는 본 발명에 따른 열교환기의 튜브 연결구조를 보여주는 단면도,9 is a cross-sectional view showing a tube connection structure of the heat exchanger according to the present invention;

도 10은 도 9의 튜브 연결구조에 유로캡이 설치된 모습을 보여주는 단면도,10 is a cross-sectional view showing a flow path cap installed in the tube connection structure of FIG.

도 11은 본 발명에 따른 열교환기의 전체 구성을 보여주는 단면도,11 is a cross-sectional view showing the overall configuration of a heat exchanger according to the present invention;

도 12는 도 11의 A-A 선 기준 단면도이다.12 is a cross-sectional view taken along the line A-A of FIG.

<도면의 주요 부분에 대한 부호의 설명><Explanation of symbols for the main parts of the drawings>

10,20,30,40,110 : 튜브 12,22,32,42,120 : 튜브고정판10,20,30,40,110: Tube 12,22,32,42,120: Tube Fixing Plate

14,24,34,44,130 : 고정구멍 26 : 파단면14, 24, 34, 44, 130: fixing hole 26: fracture surface

33,43,125 : 돌출부 120a : 내측 평탄부33,43,125: protrusion 120a: inner flat portion

120b : 외측 평탄부 50a,50b,150a,150b : 유로캡120b: Outside flat part 50a, 50b, 150a, 150b: Euro cap

50c,150c : 연결부 100 : 열교환기50c, 150c: Connection part 100: Heat exchanger

101 : 난방수 유입구 102 : 난방수 유출구101: heating water inlet 102: heating water outlet

W : 용접부위W: welding area

Claims (5)

난방수가 내부를 통과하고 연소가스와 접촉되는 변의 폭이 높이에 비해 큰 장공형의 단면을 가지며 서로 평행하도록 일정 간격으로 나란하게 설치되는 복수의 튜브;및A plurality of tubes installed side by side at regular intervals so that the width of the side where the heating water passes through and contacts the combustion gas has a long cross-section with a large length compared to the height; and 상기 튜브의 양측 끝단에 결합되어, 상기 튜브가 일정 간격으로 고정되는 튜브고정판;을 포함하는 열교환기에 있어서,In the heat exchanger comprising a; tube fixing plate coupled to both ends of the tube, the tube is fixed at a predetermined interval, 상기 튜브고정판에는 상기 튜브 형상에 대응되는 다수의 장공형 고정구멍이 형성됨과 동시에 상기 고정구멍의 가장자리에는 상기 튜브가 연결되는 쪽으로 돌출부가 수직으로 형성되어, 상기 돌출부의 외측에 상기 튜브의 내측이 접촉되고, 상기 튜브의 끝단부가 상기 튜브고정판의 평탄부에 접촉된 것을 특징으로 하는 열교환기.The tube fixing plate is formed with a plurality of long hole-shaped fixing holes corresponding to the tube shape, and at the edge of the fixing hole, a protrusion is vertically formed at the edge of the fixing hole, and the inner side of the tube contacts the outside of the protrusion. And the end of the tube contacts the flat portion of the tube fixing plate. 제1항에 있어서,The method of claim 1, 상기 튜브고정판의 고정구멍의 가장자리에 수직으로 형성된 돌출부는 버링 가공에 의한 것을 특징으로 하는 열교환기.And a protrusion formed perpendicular to the edge of the fixing hole of the tube fixing plate by a burring process. 제2항에 있어서,The method of claim 2, 상기 돌출부의 외측과 상기 튜브의 내측 사이에서 브레이징이 되는 것을 특징으로 하는 열교환기.And a brazing between the outside of the protrusion and the inside of the tube. 제1항 내지 제3항 중 어느 하나의 항에 있어서,The method according to any one of claims 1 to 3, 상기 튜브의 끝단부와 상기 튜브고정판의 평탄부 사이에서 브레이징이 되는 것을 특징으로 하는 열교환기.Heat exchanger characterized in that the brazing between the end of the tube and the flat portion of the tube fixing plate. 제1항에 있어서,The method of claim 1, 상기 튜브고정판의 외측에는 상기 튜브의 내부를 통과하는 난방수의 유로를 구분함과 아울러 열교환기 내부유로를 밀폐하기 위한 복수의 유로캡이 추가로 구비되고, 상기 유로캡 간의 연결부는 상기 튜브고정판 외측의 평탄부에 맞닿아 브레이징 용접으로 고정되는 것을 특징으로 하는 열교환기.The outer side of the tube fixing plate is provided with a plurality of passage caps for separating the flow passage of the heating water passing through the inside of the tube and for sealing the inner passage of the heat exchanger, the connection portion between the passage caps outside the tube fixing plate Heat exchanger characterized in that the contact with the flat portion of the fixed by brazing welding.
KR1020090095336A 2009-10-07 2009-10-07 Heat exchanger KR20110037773A (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR200473452Y1 (en) * 2014-04-16 2014-07-04 양용식 Electric boiler using heat medium oil

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CN105546806A (en) * 2016-02-25 2016-05-04 武汉商学院 PTC parallel flow heater

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JPH07324887A (en) * 1994-05-31 1995-12-12 Tsuchiya Mfg Co Ltd Multi-tubular type heat exchanger core and its manufacture
JP2006038336A (en) * 2004-07-27 2006-02-09 T Rad Co Ltd High temperature heat exchanger

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR200473452Y1 (en) * 2014-04-16 2014-07-04 양용식 Electric boiler using heat medium oil

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