US20100051247A1 - Heat exchanger made of aluminum alloy and method of producing same - Google Patents

Heat exchanger made of aluminum alloy and method of producing same Download PDF

Info

Publication number
US20100051247A1
US20100051247A1 US12/552,719 US55271909A US2010051247A1 US 20100051247 A1 US20100051247 A1 US 20100051247A1 US 55271909 A US55271909 A US 55271909A US 2010051247 A1 US2010051247 A1 US 2010051247A1
Authority
US
United States
Prior art keywords
tube
fin
brazing
mass
heat exchanger
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Abandoned
Application number
US12/552,719
Other languages
English (en)
Inventor
Masahiro Sogabe
Takumi Funatsu
Masayoshi Shinhama
Yasunori Hyogo
Masaya Katsumata
Masami Asano
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Marelli Corp
MA Aluminum Corp
Original Assignee
Mitsubishi Aluminum Co Ltd
Calsonic Kansei Corp
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=41376403&utm_source=***_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=US20100051247(A1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Mitsubishi Aluminum Co Ltd, Calsonic Kansei Corp filed Critical Mitsubishi Aluminum Co Ltd
Assigned to CALSONIC KANSEI CORPORATION, MITSUBISHI ALUMINUM CO., LTD. reassignment CALSONIC KANSEI CORPORATION ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: ASANO, MASAMI, HYOGO, YASUNORI, KATSUMATA, MASAYA, FUNATSU, TAKUMI, SOGABE, MASAHIRO, SHINHAMA, MASAYOSHI
Publication of US20100051247A1 publication Critical patent/US20100051247A1/en
Abandoned legal-status Critical Current

Links

Images

Classifications

    • 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
    • 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
    • B21D53/08—Making other particular articles heat exchangers or parts thereof, e.g. radiators, condensers fins, headers of both metal tubes and sheet metal
    • 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
    • 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
    • F28F9/04—Arrangements for sealing elements into header boxes or end plates
    • F28F9/06—Arrangements for sealing elements into header boxes or end plates by dismountable joints
    • 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

Definitions

  • the present invention relates to a heat exchanger made of an aluminum alloy and a method of producing the same. Specifically, the present invention relates to a heat exchanger made of an aluminum alloy and a method of producing the same in which separation of fins from tubes can be suppressed.
  • Heat exchangers made of aluminum alloy comprises tubes, fins, and header pipes as main constituents.
  • the heat exchangers are produced by brazing those constituents.
  • brazing sheets clad with Al—Si alloy brazing material have been widely used in their production.
  • Production cost of the heat exchanger has been reduced by using extruded tubes (hereafter referred to as tubes) having surfaces coated with a brazing composition composed of a mixture of a flux, a binder, and a Al—Si alloy powder and/or a Si powder.
  • the tube since Si diffuses from the surface into the inside of the tube wall, the tube is made to have a high Si concentration in its surface and low Si concentration in the inside layer. As a result, the tube is formed a potential gradient such that the surface portion has a relatively high electric potential and the inside layer has a relatively low electric potential. Such a potential gradient increases corrosion of the tube and causes pitting to occur, causing leakage of a refrigerant, and reducing the strength of the tube.
  • the Zn-concentrated fillets potential become less noble and thereby are corroded preferentially compared to the other portions of the heat exchanger. Where preferential corrosion of the fillets occurs, fins are separated from the tube surfaces, reducing heat transfer efficiency. In such a case, the heat exchanger cannot keep sufficient efficiency.
  • patent reference 1 Japanese Unexamined Patent Application, First Publication, No. 2004-330233
  • the inventors proposed a heat exchanger tube having an outer surface coated with a brazing composition that contained Si powder and a Zn-containing flux, where the amount of Si powder was controlled to be 1 to 5 g/m 2 , and the amount of Zn-containing flux was controlled to be 5 to 20 g/m 2 .
  • the Si powder and the Zn containing flux are mixed in the coating of the above-described heat exchanger tube, the Si powder is fused to form brazing liquid filler at the time of brazing, Zn contained in the flux uniformly diffuses in the brazing liquid filler and is spread homogeneously on the tube surface. Since the diffusion rate of Zn in the liquid phase such as brazing liquid filler is far faster than the diffusion rate of Zn in a solid state, the tube surface is made to have a substantially homogeneous Zn concentration. As a result, a sacrificial anode layer is homogeneously formed on the tube surface, thereby improving corrosion resistance of the heat exchanger tube.
  • a heat exchanger according the present invention is made of an assembly including a tube, a fin, and a header pipe, wherein
  • the tube is made of aluminum alloy having a composition containing, in mass %, 0.15 to 0.45% of Mn, 0.20 to 0.50% of Si, and the balance consisting of Al and unavoidable impurities, and a coating of a brazing composition that is coated on a surface of the tube to which the fin is joined and contains 1.0 to 5.0 g/m 2 of Si powder, 4.0 to 10.0 g/m 2 of Zn containing flux composed of KZnF 3 , and 0.5 to 3.0 g/m 2 of a binder; and the fin is made of an aluminum alloy containing, in mass %, 1.20 to 1.80% of Zn, 0.70 to 1.20% of Si, 0.30 to 0.80% of Fe, 0.90 to 1.50% of Mn, one two or more elements selected from the group consisting of 0.05 to 0.20% of Zr, 0.01 to 0.10% of V, and 0.01 to 0.10% of Cr, and the balance consisting of Al and unavoidable impurities;
  • the header pipe comprises a
  • the assembly of the above-described heat exchanger may comprises a plurality of tubes, a plurality of fins, and at least two header pipes, wherein each of the tubes has a constitution of the above-described tube, each of the fins has a constitution of the above-described fin, and each of the header pipes has a constitution of the above-described header pipe.
  • the tube may has flat surfaces, and the coating of the brazing composition may be formed on at least one flat surface (joint surface) of the tube such that side surfaces of the tube positioned on both sides of the flat surface are left not-coated with the brazing composition, and a perimeter (peripheral length) b of the uncoated side surface satisfies b ⁇ a ⁇ 1.5, where a denotes a width (height) of the side surface.
  • perimeter b of the uncoated side surface may be measured as a peripheral length of the side surface on a cross section perpendicular to the lengthwise direction of the tube.
  • the width a of the side surface coincident to the thickness of the tube.
  • the tube may comprises: two main flat surfaces that are parallel to each other, elongate along a lengthwise direction of the tube; and two side surfaces positioned on both sides of the main surfaces, wherein a contact plane being in contact with the side surface is inclined from the flat surface.
  • a sacrificial corrosion protection material of the header pipe may contains 0.60 to 1.20% by mass of Zn, and the balance consisting of Al and unavoidable impurities.
  • a heat exchanger according to any one of the above-described constitutions may be produced by a process comprising:
  • the assembly having the fin, tube, and header pipe to a predetermined brazing temperature, wherein the assembly is held at an intermediate temperature range from 530 to 575° C. for 4 to 8 minutes during the heating, and is subsequently heated to the predetermined brazing temperature.
  • the predetermined brazing temperature may be in the range from 580 to 615° C.
  • the tube added with appropriate amounts of Mn and Si has a corrosion resistance superior to the conventional alloy such as 1050 alloy or Al—Cu based alloy. Therefore, it is possible to reduce the amount of Zn contained in the flux for forming a sacrificial corrosion protection layer. As a result, it is possible to reduce the amount of Zn flowing to the fillet with the brazing liquid filler, thereby suppressing the preferential corrosion of the fillet. Thus, it is possible to prevent separation of the fin.
  • Mn added to the tube suppresses the fluidity of the brazing liquid filler during the brazing process. Therefore, brazing liquid filler formed during the brazing process does not flow excessively to the fillet, and partial portion of the brazing liquid filler remains on the tube surface. As a result, it is possible to reduce a difference in the Zn concentration between the fillet and the tube surface, thereby suppressing preferential corrosion of the fillet, and preventing separation of the fin.
  • the fin may be added with appropriate amounts of Si and Fe. Therefore, it is possible to generate intermetallic compounds of Si, Fe, and Mn. Since the intermetallic compounds increase the sacrificial corrosion protection effect by the fins, it is possible to reduce the content of Zn contained in the fin to provide the sacrificial corrosion protection effect. As a result, it is possible to reduce diffusion of Zn from the fin to the fillet, thereby preventing preferential corrosion of the fillet, and preventing separation of the fin.
  • the fins are not likely to separate in the heat exchanger according to the present invention, corrosion proof of the tube by the sacrificial corrosion protection effect of the fin can be maintained for a long period of time. As a result, it is possible to prolong a life of the tube compared to a conventional heat exchanger.
  • the coating of brazing composition on the surface of the tube to which the fin is brazed leaving an uncoated portion on the side surface. It is preferable to control the perimeter of the uncoated portion on the side surface of the tube to be within 1.5 times the width of the side surface of the tube.
  • Zn-containing portion constitutes an anode portion
  • Zn-free portion constituting the cathode portion is protected from corrosion by preferential corrosion of the anode portion.
  • Zn-free portion side surface of the tube acting as the cathode portion has a large area
  • Zn-containing portion brazing composition coated surface
  • an outer surface of header pipes having a large surface area may act as a cathode and increases corrosion of the fillet.
  • outer sacrificial corrosion protection material, and inner brazing material and by having the sacrificial corrosion protection material contains 0.60 to 1.20% by mass of Zn so as to have the sacrificial corrosion protection material of the header pipe be corroded preferentially, it is possible to suppress the preferential corrosion of fillet, thereby suppressing separation of the fin.
  • the assembled fin, tube, and fillet are held at an intermediate temperature range from 530 to 575° C. for 4 to 8 minutes, and subsequently heated to a brazing temperature.
  • the assembly since the assembly is held for a predetermined duration at a temperature range at which flow of brazing liquid filler does not occur but diffusion of Zn to the tube does occur, it is possible to ensure sufficient diffusion of Zn into the tube wall of the tube. Therefore, it is possible to suppress the excessive concentration of Zn into the fillet. Therefore, it is possible to suppress the preferential corrosion of fillet, thereby suppressing separation of the fin from the heat exchanger.
  • FIG. 1 is a schematic diagram showing a front view of a heat exchanger according to one embodiment of the present invention.
  • FIG. 2 is a schematic diagram showing a cross section of a partial portion of an assembly comprising header pipes, tubes, and fins according to the present invention at a state before brazing.
  • FIG. 3 is a schematic diagram showing a cross section of a partial portion of an assembly comprising header pipes, tubes, and fins according to the present invention at a state after brazing.
  • FIG. 4 is a transversal cross section of a tube according to the present invention.
  • FIG. 5 is an exemplary drawing showing an anode portion and a cathode portion in the cross section of the tube according to the present invention.
  • FIGS. 6A to 6C respectively show examples of a cross-sectional shape of side surface of a tube according to the present invention.
  • FIG. 6A shows an example in which side surface of the tube has a flat surface constituting a main area and curved corner surfaces in the vicinity of the surface of the tube.
  • FIG. 6B is a diagram showing an example in which the tube has a curved side surface.
  • FIG. 6C is a diagram showing an example in which the side surface of the tube is constituted of two flat surfaces inclined to each other forming an angle ⁇ .
  • FIGS. 7A and 7B respectively show examples of a cross section of a tube according to the present invention.
  • FIG. 7A shows an example where the side surface S 1 of the tube has a flat surface.
  • FIG. 7B shows a cross section of an example shown in FIG. 6B , where a whole area of the side surface S 2 is a curved surface.
  • FIG. 8 is a diagram showing an exemplary state of brazing a fin to a tube according to the invention, where the fin is brazed to the tube by fillets.
  • FIG. 9 shows a state of the brazing tube, fins, and header pipes by fillets, where a surface of the header pipe is composed of a Zn-containing sacrificial corrosion protection material.
  • FIG. 10 shows a state of a brazing tube, fins, and header pipes by fillets, where a surface of the header pipe is free of Zn.
  • FIG. 11 is an exemplary drawing showing a concentration profile of Zn in the surface portion of the tube, showing profiles obtained by a brazing process of the fin to the tube in a case where the heating temperature is raised monotonously to the brazing temperature, and in a case where the heating temperature is held at an intermediate temperature for a predetermined duration and subsequently raised to the brazing temperature.
  • FIG. 12 is a drawing explaining a concentration profile of Zn on the surface portion of the tube obtained by a brazing process of the fin to the tube in a case where heating temperature is raised monotonously to the brazing temperature.
  • FIG. 13 is a drawing showing a concentration profile of Zn in the surface portion of the tube, showing a profile obtained by a brazing process of the fin to the tube in a case where a heating temperature is held at an intermediate temperature range for a predetermined duration and subsequently raised to the brazing temperature.
  • FIG. 1 is a schematic diagram that shows an embodiment of a heat exchanger according to the present invention.
  • the heat exchanger 100 mainly comprises two header pipes 1 , 2 that are bilaterally arranged in parallel to each other intervening a predetermined interval (clearance), a plurality of flat tubes 3 that are in parallel to each other and each joined to the header pipes 1 , 2 at right angles, and a plurality of corrugated fins that are each joined to the upper and/or lower tubes 3 .
  • Header pipes 1 , 2 , tubes 3 , and fins 4 are constituted of below-described aluminum alloys.
  • the header pipe 1 and header pipe 2 have side surfaces opposed to each other, and a plurality of slits are formed in the side surface with a predetermined interval along lengthwise direction of each header pipe.
  • An end portion of each tube 3 are inserted into the opposed slits of the header pipes 1 , 2 such that the tube 3 is installed between the header pipes 1 , 2 .
  • a plurality of tubes 3 are installed between the header pipes 1 , 2 and are arranged with a predetermined interval.
  • Each fin 4 is brazed to an upper surface or a lower surface of the tube 3 . That is, as shown in FIG.
  • fillets 8 are formed at joint portions where end portions of the tube 3 are inserted to the slits 6 of the header pipes 1 , 2 , and the tube 3 is brazed to the header pipes 1 , 2 .
  • ridge portions (peak portions) of the wavy corrugated fin 4 are opposed to surface of adjacent tubes 3 and fillets 9 are formed between the ridge portions and the tube surface.
  • corrugated fins are brazed to the surface of the tube 3 .
  • each tube 3 that is the surfaces to which the fin 4 is joined, are coated with a coating for brazing (coating 7 of a brazing composition).
  • the coating 7 includes 1.0 to 5.0 g/m 2 of Si powder, 4.0 to 10.0 g/m 2 of Zn-containing fluoride based flux (e.g., KZnF 3 ), 0.5 to 3.0 g/m 2 of a binder (for example, acrylic resin).
  • a tube 3 of the present embodiment has a constitution of a flat multi-port tube, as shown in FIG. 4 and FIG. 5 showing a transversal cross section of the tube 3 .
  • the tube 3 has a plurality of passages 3 c in its interior, flat upper surface 3 A, flat lower surface 3 B, and side surfaces 3 D adjacent to the surfaces.
  • the coating 7 of brazing composition may be formed on the surface 3 A and the surface 3 B of the tube leaving uncoated portion on both sides of the coated portion. That is, boundaries between the coated portion and uncoated portion defines a width of the coating.
  • the width of the coating is measured along a direction perpendicular to the lengthwise direction of the tube.
  • a surface of the flat tube 3 of the present embodiment comprises: two main flat surfaces that are parallel to each other, elongate along a lengthwise direction of the tube 3 , and constitute the surface 3 A and surface 3 B of the tube 3 ; and two side surfaces 3 D positioned on both sides of the main surfaces, wherein a contact plane in contact with the side surface 3 D is inclined from the main surface.
  • a height (width) a of the side surface 3 D that is, a thickness of the main body of the tube 3 and a perimeter b of the uncoated portion of the side surface satisfies b ⁇ a ⁇ 1.5.
  • the perimeter b of the uncoated portion denotes a peripheral length of the uncoated portion on a cross section perpendicular to the lengthwise direction of the tube.
  • side surface 3 D of the tube 3 shown in FIG. 4 and FIG. 5 may have a shape composed of a flat face 3 G and curved corner surface 3 H as shown in FIG. 6A .
  • the flat surface 3 G of the side surface 3 D may have a width of 0.45X
  • each of the corner portions (curved portions of the side surface 3 D) may have a height of 0.275X.
  • the side surface of the tube 3 may be a curved surface.
  • the side surface 3 J may have an arc shaped outline on a transversal cross section of the tube such that a curvature radius R of the side surface 3 J satisfies R>1.003(X/2), where X is the thickness (dimension of the side surface) of the tube 3 .
  • the side surface of the tube 3 may be constituted of two flat faces (inclined faces) 3 K inclined to each other.
  • the inclined surfaces 3 K may constitute a corner forming an corner angle ⁇ of ⁇ >84°.
  • the limitations of the shapes, R>1.003(X/2) in FIG. 6B and ⁇ >84° are both defined based on a boundary conditions so as to satisfy b ⁇ a ⁇ 1.5 defined in the present invention.
  • An assembly comprising a tube 3 and a fin 4 joined to the tube 3 through a fillet 9 may be formed by brazing a fin 4 made of an aluminum alloy of the below-described composition to a tube 3 made of the aluminum alloy of the below explained composition to have a transversal cross section as shown in FIG. 4 to FIGS. 6A-C , using a coating 7 of brazing composition selected from the below-described composition.
  • a side surface 3 D not provided with a coating 7 of brazing composition constitutes a cathode portion 9 protected from corrosion, and the fin 4 and the fillet 9 constitute anode portions that are preferentially corroded.
  • Corrosion rates of the preferentially corroded anode portions (fin 4 and fillet 9 ) are largely affected by the area ratio of cathode portions (side surfaces 3 D of the tube 3 ) to the anode portion. As the area ratio of the cathode portion (side surfaces 3 D of the tube 3 ) is decreased, the corrosion rate of the anode portion (fin 4 and fillet 4 ) is decreased.
  • the tube 30 has a flat side surfaces S 1 as shown in FIG. 7A , relative area fraction of the side surface is decreased compared to a tube 31 having a curved surface S 2 as shown in FIG. 7B . As a result, it is possible to decrease the corrosion rate of the fillets 9 .
  • the shape of the tube 30 is superior to the shape of tube 31 in suppressing separation of the fin.
  • the tube 3 it is possible to suppress increase of corrosion by decreasing the area of the side surface 3 D (cathode portion) free of Zn, thereby suppressing preferential corrosion of fillet 9 , it is possible to inhibit the separation of fin 4 .
  • composition used in the coating 7 of the brazing composition is explained.
  • a Si powder is eroded with Al (aluminum) as a constituent of the tube and forms brazing filler joining the fin 4 and the tube 3 .
  • Si powder is fused to form a brazing liquid filler, and Zn contained in the flux homogeneously diffuses into the brazing liquid filler and is spread uniformly on the surface of the tube 3 .
  • the Diffusion rate of Zn in the brazing liquid filler (liquid phase brazing metal) is far faster (greater) than a diffusion rate of Zn in a solid phase. Therefore, the Zn concentration on the surface of the tube 3 is substantially homogenized. That is, the homogenous Zn-diffused layer is formed, and corrosion resistance of the tube 3 is improved.
  • Amount of Coating of Si Powder 1.0 to 5.0 g/m 2
  • the amount of Si powder in the coating is less than 1.0 g/m 2 , brazability is deteriorated.
  • an Si is coated with an amount exceeding 5.0 g/m 2 , excessive formation of brazing metal tends to cause concentration of Zn.
  • corrosion depth of the tube is increased, and it is impossible to obtain the intended effect for preventing separation of fins. Therefore, the amount of Si powder in the coating is controlled to be in the range of 1.0 to 5.0 g/m 2 .
  • the grain size (grain diameter) of Si powder is less than 1 ⁇ m in D(50), it tends to increase a possibility of failing in forming a braze joint of fin 4 to tube 3 , and the residual ratio of fin (ratio of fin escaped from separating) decreases.
  • the grain size of Si particle exceeds 6 ⁇ m in D(50)
  • the depth of corrosion in the tube 3 is increased. Therefore, it is preferable to control the grain size of Si powder to be within 1 to 6 ⁇ m in D(50), where D(50) denotes grain size where the cumulative volume of particles having equal size or smaller size than that size constitute 50% in volume of all the particles.
  • D(50) may be measured using a laser beam scattering method.
  • Zn containing fluoride-based flux forms a Zn diffused layer on the surface of the tube 3 at the time of brazing, and thereby improving pitting corrosion resistance of the tube.
  • the flux removes oxide film from the surface of the tube 3 at the time of brazing, and increase spreading and wetting of the brazing filler, thereby improving the brazability.
  • the amount of flux in the coating is less than 4.0 g/m 2 , it is impossible to form the Zn-diffused layer sufficiently, and the corrosion resistance of the tube is deteriorated. In addition, it is impossible to destroy and remove the surface oxide film from the brazed tube sufficiently, resulting in poor brazing.
  • the amount of the flux in the coating exceeds 10.0 g/m 2 , Zn is concentrated in the fillet, especially in the eutectic portion. As a result, corrosion resistance of the fillet is deteriorated and separation of the fin is increased. Therefore, the amount Zn-containing fluoride based flux in the coating was controlled to be 4.0 to 10.0 g/m 2 .
  • KZnF 3 may be used as the Zn-containing fluoride based flux.
  • grain size of flux (flux powder) is smaller than 1 ⁇ m in D(50), depth of corrosion of the tube 3 increases by aggregation of flux powder. Where the grain size of the flux exceeds 6 ⁇ m in D(50), joining of the fins 4 is likely to poor, resulting in reduction of the residual ratio of the fins 4 . Therefore, grain size of the flux is preferably 1 to 6 ⁇ m.
  • D(50) denotes the critical grain size (grain diameter) as an indicator of grain size distribution of a powder, where the cumulative volume of particles equal to or smaller than the size constitute 50% in volume of all the particles. D(50) may be measured using a laser beam scattering method.
  • the coating composition contains a binder.
  • acryl-based resin e.g., acrylic resin
  • the binder may be used as the binder.
  • the amount of binder in the coating is less than 0.5 g/m 2 , workability (delamination-resistance) of the coating is deteriorated.
  • the amount of the binder in the coating exceeds 3.0 g/m 2 , the brazability is deteriorated. Therefore, the amount of binder in the coating is controlled to be 0.5 to 3.0 g/m 2 .
  • the binder is evaporated by heating at the time of brazing.
  • a method of coating the brazing composition comprising Si powder, flux, and binder is not limited.
  • coating of the brazing composition may be performed by an appropriate method selected from a spray method, a shower method, a flow-coater method, a roll-coater method, a brash-coating method, a dipping method, an electrostatic coating method, or the like.
  • a portion of the tube coated by the brazing composition may be whole of the surface of the tube 3 .
  • the coating may be formed on a partial portion of the surface of the tube 3 , provided that at least a portion of sufficient area in the vicinity of joint portion to which the fin 4 is joined is coated with the brazing composition such that the fin 4 may be joined to the tube 3 by brazing.
  • the side surface of the tube 3 of the present invention is not coated with the brazing composition.
  • a partial portion of the side surface may be coated with the brazing composition during coating of the brazing composition on e.g., upper surface.
  • Such a tube 3 may also be applied as a tube 3 of the present invention.
  • the tube 3 is made of aluminum alloy containing, in mass %, 0.15 to 0.45% of Mn, 0.20 to 0.50% of Si, and the balance consisting of Al and unavoidable impurities.
  • the tube 3 may be produced by extrusion of an aluminum alloy of the above-described composition.
  • Mn is an element that improves corrosion resistance of the tube 3 and increases the mechanical strength of the tube 3 .
  • Mn has an effect of improving extrudability of the aluminum alloy during extrusion.
  • Mn has an effect of suppressing fluidity of the brazing metal (brazing liquid filler), thereby suppressing the difference in concentration of Zn between the fillet 4 and the tube 3 .
  • Mn content is controlled to be 0.15 to 0.45% by mass.
  • Preferable Mn content is 0.20 to 0.40% by mass.
  • Si is an element having an effect of increasing strength and corrosion resistance of the tube 3 .
  • the Si content in the aluminum alloy for constituting the tube 3 is controlled to be 0.20 to 0.50% by mass.
  • the Si content is preferably 0.25 to 0.45% by mass.
  • the fin 4 to be joined to the tube 3 is constituted of an aluminum alloy containing, in mass %, 1.20 to 1.80% of Zn, 0.70 to 1.20% of Si, 0.30 to 0.80% of Fe, 0.90 to 1.50% of Mn, and further containing one or two or more element selected from 0.05 to 0.20% of Zr, 0.01 to 0.10% of V, and 0.01 to 0.10% of Cr, and the balance consisting of Al and unavoidable impurities.
  • the fin 4 is produced by casting a molten alloy having the above-described composition in accordance with the general method, and working the cast alloy into a corrugated shape through, hot-rolling, cold-rolling or the like.
  • the method of producing the fin 4 is not limited to a specific method. It is possible to apply known methods of producing a fin. In the following, reasons for limiting the composition of aluminum alloy constituting the fin 4 of the present invention is explained.
  • the presence of Zn reduces the electric potential of the fin 4 and provides the fin 4 with sacrificial corrosion protection effect.
  • the sacrificial corrosion protection effect of the fin denotes an effect that preferential corrosion of the fin protects other members (e.g., tube) from corrosion.
  • the fin cannot exhibits a sufficient sacrificial protection effect.
  • the content of Zn exceeds 1.80%, Zn diffuses into the fillet in large amount during the brazing.
  • the Zn concentration in the fillet 9 is increased, and the fillet is corroded before the fin 4 is corroded.
  • the corrosion rate of the fin 4 is increased, and the life of the fin is shortened.
  • the fin has the sacrificial corrosion protection effect only for a short time. Therefore, in the present invention, the Zn content of the fin 4 is controlled to be 1.20 to 1.80% by mass.
  • the Zn content is preferably 1.45 to 1.55%.
  • the presence of Si improves the high-temperature strength and the room-temperature strength of the fin 4 .
  • the content of Si in the fin is less than 0.70%, it is impossible to improve the high-temperature strength and room-temperature strength effectively.
  • the Si content in the aluminum alloy for constituting the fin is controlled to be 0.70 to 1.20%.
  • the Si content is preferably 0.95 to 1.10%.
  • Fe improves the high-temperature strength and the room-temperature strength of the fin 4 .
  • the content of Fe is less than 0.30%, it is impossible to improve the high-temperature strength and the room-temperature strength effectively.
  • the Fe content in the aluminum alloy for constituting the fin is controlled to be 0.30 to 0.80% by mass.
  • Preferable Fe content is 0.47 to 0.53% by mass.
  • Mn improves high-temperature strength and room-temperature strength of the fin 4 .
  • content of Mn is less than 0.90%, it is impossible to improve the high-temperature strength and the room-temperature strength of the fin 4 effectively.
  • the Mn content in the aluminum alloy for constituting the fin is controlled to be 0.90 to 1.50% by mass.
  • the Mn content is preferably 1.15 to 1.25% by mass.
  • Si and Fe are controlled to be in the above-described ranges, Si and Fe respectively form Mn-containing precipitates, thereby reducing the amount of solid-solubilized Mn, and decreasing the electric potential of the fin 4 .
  • fin 9 is preferentially corroded compared to the primary portion of the fillet 9 , thereby preventing separation of fillet 9 .
  • the Zr content of the aluminum alloy for constituting the fin is controlled to be 0.05 to 0.20% by mass.
  • the Zr content is preferably 0.10 to 0.15% by mass.
  • V Vanadium (V): 0.01 to 0.10%
  • V improves the high-temperature strength and the room-temperature strength of the fin 4 .
  • the content of V is less than 0.01%, it is impossible to improve the high-temperature strength and the room-temperature strength of the fin 4 effectively.
  • the V content in the aluminum alloy for constituting the fin is controlled to be 0.01 to 0.10% by mass.
  • Preferable V content is 0.02 to 0.08% by mass.
  • the Cr content in the aluminum alloy for constituting the fin is controlled to be 0.01 to 0.10% by mass.
  • the Cr content is preferably 0.02 to 0.08% by mass.
  • the aluminum alloy constituting the fin of the present invention contains one, two or more selected from Zr, V, and C with a content of the above-described range.
  • the header pipe 1 is constituted of a pipe wall having three layered structure including a core material 11 , a sacrificial corrosion protection material 12 provided to the outer periphery of the core material 11 , and a brazing material layer 13 provided to the inner periphery of the core material 11 .
  • the sacrificial corrosion protection material 12 By providing the sacrificial corrosion protection material 12 to the outer periphery of the core material 11 , it is possible to obtain corrosion protection by the header pipe 1 in addition to the corrosion protection by the fin 4 . Therefore, it is possible to increase the corrosion resistance of the tube 3 , especially in the vicinity of the header pipe 1 .
  • the material 11 is constituted of a Al—Mn-based alloy.
  • the core material 11 contains 0.05 to 1.50% by mass of Mn.
  • the core material may further contain 0.05 to 0.8% by mass of Cu and/or 0.05 to 0.15% by mass of Zr.
  • the balance of the above-described composition may be Al and unavoidable impurities.
  • Sacrificial corrosion protection material 12 provided to the outer periphery of the core material 11 is constituted of an aluminum alloy containing 0.60 to 1.20% by mass of Zn, and the balance consisting of Al and unavoidable impurities.
  • the sacrificial corrosion protection material 12 is integrated to the core material 11 as a clad layer by rolling (clad-rolling). The contents of the components of the sacrificial corrosion protection material 12 are limited based on the below described reason.
  • Zn is an element that provides the sacrificial corrosion protection material 12 with sacrificial corrosion protection effect.
  • content of Zn is less than 0.60%, sufficient sacrificial corrosion protection effect cannot be obtained.
  • content of Zn exceeds 1.20% by mass, corrosion-resistance of the sacrificial corrosion protection material 12 itself is deteriorated. That is, by excessive corrosion of the sacrificial corrosion protection material, effect of sacrificial corrosion protection cannot be maintained for a long time. Therefore, content of Zn in the sacrificial corrosion protection material 12 is preferably controlled within the range of 0.60 to 1.20%. Preferable content of Zn is 0.70 to 1.10% by mass.
  • Clad ratio of the sacrificial corrosion protection material 12 to the core material is preferably 5 to 10%. That is, thickness of the sacrificial corrosion protection material 12 is preferably 5 to 10% of total thickness of the sacrificial corrosion protection material 12 and the core material 11 . Where the clad ratio of the sacrificial corrosion protection material 12 is less than 5%, sufficient sacrificial corrosion protection effect cannot be obtained. Where the clad ratio of the sacrificial corrosion protection material 12 exceeds 10%, increase of the sacrificial corrosion protection effect does not correspond to the increasing thickness of the sacrificial corrosion protection material 12 .
  • the brazing material 13 provided to the inner periphery of the core material 11 is preferably constituted of Al—Si based alloy.
  • the Al—Si based alloy contains 5.0 to 11.5% by mass of Si.
  • the brazing material 13 is clad to the core material by rolling. Clad ratio of the brazing material 13 to the core material 11 is preferably 3 to 10% by mass. Where clad ratio of the brazing material 13 is less than 3%, sufficient brazing metal cannot be provided for constituting a fillet 8 . Where the clad ratio of the brazing material 13 exceeds 10%, the brazing metal is provided excessively.
  • FIG. 2 is an magnified view showing a partial portion of a pre-brazing assembly 101 constructed of the header pipes 1 ( 2 ), tubes 3 and fins 4 , where tubes 3 are coated with the brazing composition on the surfaces joined with the fins 4 .
  • tube 3 is assembled to the header pipe 1 such that an end portion of the tube 3 is inserted to a slit 6 formed in the header pipe 1 .
  • the assembly 101 is heated to a temperature not lower than the melting point of the brazing material.
  • the brazing material 13 is molten as shown in FIG. 3 , and tube 3 is joined to the header pipe 1 , and the fin 4 is joined to the tube 3 .
  • the brazing material 13 in the inner periphery of the header pipe 1 is fused (molten) and flows to the vicinity of the slit 6 , forming fillets 8 by which the header pipe 1 and the tube are joined.
  • the coating 7 of the brazing composition is fused to form a brazing liquid filler that flows towards the vicinity of fin 4 by capillary effect and forms fillets 9 by which the tube 3 and the fin 4 are joined.
  • the assembly is heated to an appropriate temperature in an appropriate atmosphere such as an inert atmosphere so as to fuse the brazing composition coating 7 and the brazing material 13 .
  • an activity of the flux is increased, and Zn contained in the flux precipitates on the surface of the brazed material (tube 3 ) and diffuses into the thickness direction of the tube 3 .
  • the activated flux decomposes oxide film on the surface of the tube 3 and oxide films on the surface of powder particles in the brazing composition, and increases wetting between the brazing metal and the brazed material.
  • heating temperature is not lower than the melting point of the brazing material.
  • the assembly is heated up to a temperature in a range of 580 to 615° C. and held at that temperature for about 1 to 10 minutes.
  • the assembly is retained (held) at an intermediate temperature within a range of 530 to 575° C. for 4 to 8 minutes. While holding the intermediate temperature, Zn contained in the flux is diffused into the surface portion of the tube 3 and fixed in the tube. As a result, the amount of Zn flows to the fillet is reduced, and separation of the fin 4 is prevented.
  • intermediate retention temperature is less than 530° C. or retention time is shorter than 4 minutes
  • Zn cannot diffuse into the surface portion of the tube 3 sufficiently.
  • a large amount of Zn is contained in the brazing liquid filler flowing to the fillet 9 .
  • the retention temperature exceeds 575° C. or the retention time exceeds 8 minutes
  • Zn diffuse into the tube wall excessively, resulting in low Zn concentration on the surface portion of the tube 3 .
  • a satisfactory sacrificial corrosion protection layer is not formed on the surface of the tube 3 , and a corrosion resistance of the tube is deteriorated. Therefore, intermediate retention conditions during the heating process are held at a temperature range of 530 to 575° C. for a duration in a range of 4 to 8 minutes.
  • the assembly may be heated from 530 to 575° C. with a time of 4 to 8 minutes.
  • the assembly may be held at 570° C. for 4 to a time shorter than 8 minutes. Any other thermal history may be applied provided that the assembly is exposed to heating conditions in the temperature range of 530 to 575° C. for a duration of not shorter than 4 minutes and not longer than 8 minutes.
  • partial fraction of a matrix of the aluminum alloy constituting the tube 3 reacts with the brazing composition of the coating 7 and forms a brazing metal by which the tube 3 and the fin 4 are brazed.
  • Zn contained in the flux diffuses into the surface portion of the tube 3 , making the electric potential of the tube surface lower than that of the inner portion of the tube 3 .
  • satisfactory brazing metal is formed in the time of brazing without occurring residual silicon particles, and a fillet 9 of sufficient size is formed between the tube 3 and the fin 4 .
  • concentration of Zn to the fillet 9 is suppressed by the increased size of the fillet 9 .
  • the assembly is held at an intermediate temperature range of 530 to 575° C. for 4 to 8 minutes and subsequently heated to the brazing temperature.
  • the tube 3 by having the tube 3 to contain appropriate amounts of Mn and Si, that is, 0.15 to 0.45% by mass of Mn and 0.20 to 0.50% by mass of Si, it is possible to provide a tube having superior corrosion resistance compared to the conventional tube made of 1050 alloy or Al—Cu based alloy.
  • Mn contained in the tube 3 suppress fluidity of the brazing liquid filler in the time of brazing. Therefore, excessive flow of brazing liquid filler to the fillet 9 is avoided, and partial fraction of the brazing liquid filler remains on the surface of the tube 3 . Therefore, it is possible to suppress the difference in Zn concentration between the fillet 9 and the surface of the tube 3 , thereby suppressing separation of fin 4 .
  • the heat exchanger 100 of the present embodiment appropriate amount of Si and Fe, that is, 0.7 to 1.20% by mass of Si and 0.30 to 0.80% by mass of Fe are added to the aluminum alloy constituting the fin. Therefore, it is possible to form intermetallic compounds of Si, Fe, and Mn, thereby improving sacrificial corrosion protection effect by the fin. Therefore, it is possible to suppress the amount of Zn in the fin to provide sacrificial corrosion protection effect. As a result, as shown in FIG. 8 , it is possible to reduce diffusion of Zn from the fin 4 to the fillet 9 , thereby reducing concentration of Zn in the fillet 9 . Therefore, it is possible to prevent preferential corrosion of the fillet 9 , thereby suppressing separation of the fin 4 .
  • the coating of a brazing composition on the surface leaving the side surfaces uncoated, where the perimeter of a uncoated side surface is controlled to be within 1.5 times the thickness of the tube.
  • Zn-containing portions constitute anode portions, and protect Zn-free portion as a cathode portion from corrosion by preferential corrosion of the anode portion. That is, as the Zn-free cathode portion (side surface of the tube) has a large area fraction, corrosion of the Zn-containing anode portion (brazing metal coated portion) is increased by the sacrificial corrosion protection effect.
  • electric potential of outer surfaces of header pipes 1 , 2 also affect the corrosion of fillet 9 in the vicinity of the header pipes 1 , 2 . Since each of the header pipes 1 , 2 has a large surface area, the electric potential of the tube has a large influence.
  • the header pipes 1 , 2 each comprises a core material 11 , the outer sacrificial corrosion protection material 12 , and inner brazing material 13 , and the sacrificial corrosion protection material 12 contains Zn in an amount of 0.60 to 1.20% by mass, by the preferential corrosion of sacrificial corrosion protection material 12 of the header pipes 1 , 2 , it is possible to suppress preferential corrosion of the fillets 9 in the vicinity of the header pipes 1 , 2 , for example, in the position shown by the oval dotted line shown in FIG. 9 , thereby suppressing separation of the fin 4 .
  • the assembly is held at an intermediate temperature range of 530 to 575° C. for 4 to 8 minutes before heated up to the brazing temperature.
  • FIG. 11 shows a comparison of the two cases. Where the retention was performed at a temperature range of 530 to 575° C. for 4 to 8 minutes, as shown in the curve a 1 , Zn diffuses into a deep portion in the tube 3 . On the other hand, when the above-described retention is avoided, Zn does not diffuse into the deep portion of the tube 3 .
  • FIG. 12 is a diagram showing a Zn concentration profile along a depth direction in the tube 3 and position of the fin 4 , where the retention has not been performed.
  • FIG. 13 is a graph showing a Zn concentration profile along a depth direction in the tube 3 and position of the fin 4 , where the retention has been performed.
  • Si in the brazing material may form eutectic composition with Al resulting in increase of erosion.
  • the depth of erosion is shown by the dotted line in each of FIG. 12 and FIG. 13 .
  • the diffusion of Zn proceeds in the molten brazing liquid filler having the eutectic composition.
  • the diffusion depth of Zn in the tube is reduced, and the amount of Zn concentrating in the fillet 9 generated in the surface portion of the tube joined with the fin is increased.
  • Zn diffuses deeply into the tube 3 , and the amount of Zn existing in the tube surface and concentrating in the fillet 9 is decreased. Therefore, the amount of Zn concentrated in the fillet 9 generated in the surface portion of the tube joined with the fin is decreased. Therefore, it is possible to inhibit preferential corrosion of the fillet 9 , thereby preventing the separation of the fins 4 .
  • An aluminum alloy having a composition shown in Table 1 was cast from molten alloy for constituting tubes, and aluminum alloy having a composition shown in Table 2 was cast from a molten alloy for constituting fins.
  • an aluminum alloy for core material, an aluminum alloy for sacrificial corrosion protection material, and an aluminum alloy for brazing material, each having a composition as shown in Table 3 were cast from molten alloys.
  • the aluminum alloy for a tube was subjected to heat treatment for homogenization, and was subsequently subjected to hot extrusion so as to have a shapes as shown in transversal cross section in FIG. 4 and FIG. 6A .
  • the wall thickness was 0.30 mm
  • the width was 18.0 mm
  • the total thickness was 1.5 mm
  • the height of flat face of the side surface was 0.6 mm
  • the curvature radius of the corner portion was 0.45 mm.
  • the wall thickness was 0.30 mm
  • the width was 18.0 mm
  • the total thickness was 1.5 mm
  • the height of flat face of the side surface was 0.9 mm
  • the curvature radius of the corner portion was 0.3 mm.
  • tubes 31 having an arc shaped section of the side surface 3 as shown in FIG. 6B and FIG. 7B were produced such that a radius of the arc was 0.75 mm or 1.5 mm.
  • a tube having a side surface constituted of inclined flat faces as shown in FIG. 6C was formed such that the angle between flat faces was 90°.
  • the aluminum alloy for the fins was subjected to homogenization heat treatment, hot rolling, and cold rolling, thereby obtaining a plate of 0.08 mm in thickness.
  • the plate was subjected to corrugated processing. Thus, fins 4 were produced.
  • An aluminum alloy for sacrificial corrosion protection material, an aluminum alloy for core material, and an aluminum alloy for brazing material were each subjected to hot rolling and cold rolling to obtain plates each having a thickness of 0.12 mm, 1.30 mm, and 0.08 mm.
  • Three layered clad plate was obtained using the aluminum alloy plate for core material as a center layer, and arranging the aluminum alloy plate for sacrificial corrosion protection material on one side, and aluminum alloy plate for brazing material on another side of the core material.
  • the three layered clad plate was processed to an seam-welded pipe having a circular section. Header pipe 1 was produced by working the seam-welded pipe. Outer layer of the header pipe 1 was sacrificial corrosion protection material, and inner layer of the header pipe 1 was a brazing material.
  • brazing composition was roll-coated on the surface of the tube 3 , and was dried.
  • the brazing composition was constituted of a mixture of silicon powder (grain size: 2.8 ⁇ m in D(50)), flux powder composed of KZnF 3 (grain size: 2.0 ⁇ m in D(50)), and acrylic resin (containing alcohol such as isopropyl alcohol as a solvent).
  • the amount of each component mixed in the composition was controlled such that the amount of the component in the coating had a value as shown in Table 4.
  • Condition 2 Continuously heating to 600° C. and hold 600° C. for 2 minutes, where heating from 530 to 575° C. with 6 minutes
  • Condition 3 Continuously heating to 600° C. and hold 600° C. for 2 minutes, where heating from 530 to 575° C. with 1 minutes
  • header pipes 1 , tubes 3 , and fins 4 were constructed to form constructed bodies having a shape of heat exchangers 100 as shown in FIG. 1 , and the heat exchangers were subjected to brazing using a condition selected from the below-described three conditions. In each case, the brazing was performed in a nitrogen atmosphere in a furnace.
  • the assembly was heated from a room temperature to 570° C., kept at 570° C. for 4 minutes, subsequently hearted to 600° C., and held at 600° C. for 2 minutes.
  • condition 2 the assembly was continuously heated to 600° C., and held at 600° C. for 2 minutes, where the assembly passed the temperature range from 530 to 575° C. for 6 minutes.
  • condition 3 the assembly was continuously heated to 600° C., and held at 600° C. for 2 minutes, where the assembly passed the temperature range from 530 to 575° C. for 1 minutes.
  • each heat exchanger was subjected to evaluation of brazability.
  • a tube 3 of 100 mm in length containing 33 joint portions joined to the fin 4 was cut out from the heat exchanger.
  • a proportion of a length of the braze-joint to a width of fin (18 mm) was examined, and a ratio was calculated from the result of examination at 33 joint portions, and was shown in Table 4 as a joint ratio. Based on the value of a joint ratio, the brazability was evaluated.
  • each of heat exchangers 100 was subjected to sea water acetic acid test (SWAAT) for 20 days to evaluate the corrosion resistance. After the test, the depth of corrosion of the tube 3 , and the residual ratio of fin 4 (total length of fins remaining after the test/total length of brazed fins ⁇ 100) were measured. The results were shown in Table 4.
  • the coated amount of Si is small, the separation of fin 4 occurs remarkably. Whereas, if the coated amount of Si is too large, the corrosion resistance of the tube 3 is deteriorated and the separation of the fins is increased (See Nos. 1 to 6).
  • the coated amount of the flux is too small, the tube 3 has inferior corrosion resistance, and the failure of joint formation with the fin 4 increases. If the coated amount of flux is too large, the separation of the fin 4 occurs remarkably (See Nos. 1 to 7).
  • the tube 3 has inferior corrosion resistance (See Nos. 16 and 17).
  • a perimeter of the arc that is, a perimeter b of the portion not-coated with the brazing composition preferably satisfies b ⁇ a ⁇ 1.5, where a denotes a thickness of the tube 3 .
  • a denotes a thickness of the tube 3 a thickness of the tube 3 .
  • sample No. 21 in which b ⁇ a ⁇ 1.5 is satisfied is superior both in corrosion resistance and residual ratio of fins.
  • the assembly passes through the temperature range of 530 to 575° C. during the heating process with a relatively long time of 6 minutes, it is possible to improve the corrosion resistance of the tube 3 (see No. 19), and it is possible to suppress the separation of the fin 4 .
  • the assembly passes through the temperature range of 530 to 575° C. during the heating process with a relatively short time of 1 minutes, separation of the fins 4 increases (see No. 20).
  • a target value of corrosion depth of the tube was 75 ⁇ m or less, and a target value of a residual ratio of the fin was 70% or more.
  • Heat exchangers 100 were produced in the same manner as in Example 1, while the tubes were made of aluminum alloy having a composition shown in Table 5. The depth of corrosion in the tube 3 and the residual ratio of fins 4 were examined in the same manner as in Example 1. The results are shown in Table 5. In this case, brazing composition of No. 4 shown in Table 4 was applied as a coating composition.
  • the corrosion resistance of the tube 3 and the residual ratio of fins 4 vary depending on the Mn content and the Si content of the tube 3 . Therefore, preferable contents in the present invention were specified to be 0.15 to 0.45% by mass of Mn and 0.20 to 0.50% by mass of Si.
  • Heat exchangers 100 were produced in a same manner as in Example 1, while the fins were made of aluminum alloy having a composition shown in Table 6. The depth of corrosion in the tube 3 and the residual ratio of fins 4 were examined in the same manner as in Example 1. The results are shown in Table 6. In this case, a brazing composition of No. 4 shown in Table 4 was applied as the coating composition.
  • the corrosion resistance of the tube 3 and the residual ration of fin 4 vary depending on the amounts of constituent elements of the aluminum alloy constituting the fin. Therefore it was discovered that the Zn, Si, Fe, and Mn contents in the aluminum alloy of the fins were required to be 1.20 to 1.80% by mass of Zn, 0.70 to 1.20% by mass of Si, 0.30 to 0.80% by mass of Fe, and 0.90 to 1.50% by mass of Mn so as to achieve a high joint ratio of fin-tube joint, to provide high resistivity, and to increase a high residual ratio of fins.
  • Heat exchangers 100 were produced in the same manner as in Example 1, while the header pipes were made of aluminum alloy having a composition shown in Table 7. The depth of corrosion in the tube 3 and the residual ratio of fins 4 were examined in the same manner as in Example 1 (Table 7, Nos. 62 to 66).
  • Heat exchangers 100 were produced in a same manner as in Example 1, while the header pipes were constituted of a three layered structure comprising a brazing material layer on the outer surface, and a sacrificial layer on the inner surface of the aluminum alloy constituting the core layer.
  • the depth of corrosion in the tube 3 and residual ratio of fins 4 were examined in the same manner as in Example 1 (Table 7, No. 67).
  • a corrosion resistance of the tube 3 and the residual ratio of the fins 4 tend to be inferior when the content of Zn in the alloy forming the sacrificial layer is lower or higher than a certain range of composition (No. 62, No. 65). Therefore, in the present invention, the preferable content of Zn in the sacrificial corrosion protection material of the header pipe was specified to be 0.60 to 1.20% by mass.
  • the header pipe was constituted of a three-layered structure having a sacrificial corrosion protection material in the internal side and brazing material in the outer side, the residual ratio of the fin 4 was deteriorated (No. 67 of Table 7).
  • header pipe was constituted of two layered structure having an outer brazing material but lacking outer sacrificial corrosion protection material, as shown in sample No. 66 of Table 7, a corrosion resistance of the tube and the residual ratio of the fins were deteriorated.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • General Engineering & Computer Science (AREA)
  • Prevention Of Electric Corrosion (AREA)
  • Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
  • Laminated Bodies (AREA)
US12/552,719 2008-09-02 2009-09-02 Heat exchanger made of aluminum alloy and method of producing same Abandoned US20100051247A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2008-225324 2008-09-02
JP2008225324 2008-09-02

Publications (1)

Publication Number Publication Date
US20100051247A1 true US20100051247A1 (en) 2010-03-04

Family

ID=41376403

Family Applications (1)

Application Number Title Priority Date Filing Date
US12/552,719 Abandoned US20100051247A1 (en) 2008-09-02 2009-09-02 Heat exchanger made of aluminum alloy and method of producing same

Country Status (4)

Country Link
US (1) US20100051247A1 (ja)
EP (1) EP2159528B1 (ja)
JP (1) JP5548411B2 (ja)
CN (1) CN101676667B (ja)

Cited By (24)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20100307180A1 (en) * 2009-06-05 2010-12-09 Denso Corporation Cold-storage heat exchanger
US20110240280A1 (en) * 2010-03-31 2011-10-06 Kabushiki Kaisha Kobe Seiko Sho (Kobe Steel, Ltd.) Aluminum alloy brazing sheet and heat exchanger
US20120292001A1 (en) * 2009-11-25 2012-11-22 Matthias Traub Soldered aluminum heat exchanger
US20130255926A1 (en) * 2012-04-03 2013-10-03 Keihin Thermal Technology Corporation Heat exchanger and method of manufacturing the same
US8640766B2 (en) 2003-05-06 2014-02-04 Mitsubishi Aluminum Co., Ltd. Heat exchanger tube
US20140158330A1 (en) * 2011-08-09 2014-06-12 Toyota Jidosha Kabushiki Kaisha Heat exchanger
US20140360017A1 (en) * 2013-06-07 2014-12-11 Keihin Thermal Technology Corporation Method for anticorrosion treatment of outer surface of heat exchange tube made of aluminum extrusion and method for producing heat exchanger
US8945721B2 (en) 2010-03-02 2015-02-03 Mitsubishi Aluminum Co., Ltd. Aluminum alloy heat exchanger
US20150060035A1 (en) * 2012-03-27 2015-03-05 Mitsubishi Aluminum Co., Ltd. Heat transfer tube and method for producing same
US20150136374A1 (en) * 2012-01-31 2015-05-21 Michael Alan Burns Steam generation
DE102014206612A1 (de) * 2014-04-04 2015-10-29 Mahle International Gmbh Wärmetauscher
US9283633B2 (en) 2003-05-06 2016-03-15 Mitsubishi Aluminum Co. Ltd. Heat exchanger tube precursor and method of producing the same
US20160131445A1 (en) * 2013-10-31 2016-05-12 Mitsubishi Electric Corporation Lifetime diagnosis component for anticorrosive coating, heat exchanger, refrigeration-and-air-conditioning apparatus
US20160298914A1 (en) * 2013-10-15 2016-10-13 Uacj Corporation Aluminum Alloy Heat Exchanger
CN108195207A (zh) * 2018-03-06 2018-06-22 北京中热能源科技有限公司 一种防垢防腐的干湿式冷凝器
US10150186B2 (en) 2014-12-11 2018-12-11 Uacj Corporation Brazing method
US10473411B2 (en) 2014-12-17 2019-11-12 Carrier Corporation Aluminum alloy finned heat exchanger
US20200033073A1 (en) * 2018-07-25 2020-01-30 Mahle International Gmbh Heat exchanger
US10563924B2 (en) * 2014-09-08 2020-02-18 Mitsubishi Electric Corporation Heat exchanger and method for manufacturing plate-shaped fins for heat exchanger
US10640852B2 (en) 2017-03-30 2020-05-05 Uacj Corporation Aluminum-alloy clad material and method of manufacturing the same
US10661395B2 (en) 2014-07-30 2020-05-26 Uacj Corporation Aluminum-alloy brazing sheet
CN112457729A (zh) * 2019-09-06 2021-03-09 现代自动车株式会社 用于热交换管的涂料组合物、热交换管及涂覆方法
US11007609B2 (en) 2016-11-29 2021-05-18 Uacj Corporation Brazing sheet and manufacturing method thereof
US11320217B2 (en) 2016-01-14 2022-05-03 Uacj Corporation Heat exchanger and method of manufacturing the same

Families Citing this family (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP5670100B2 (ja) * 2010-05-25 2015-02-18 株式会社Uacj アルミニウム合金製熱交換器の製造方法
BR112014006744B1 (pt) 2011-09-22 2019-02-12 Sapa As Revestimento de pré-fluxo, e, aplicação do revestimento em um componente de alumínio
JP6030300B2 (ja) * 2011-12-28 2016-11-24 三菱アルミニウム株式会社 プレコートフィン材を使用した熱交換器の製造方法および熱交換器
EP2728155A1 (en) * 2012-11-06 2014-05-07 BorgWarner Inc. Heat exchange device for exchanging heat between fluids
CN103436747B (zh) * 2013-08-07 2016-01-20 江阴新仁科技有限公司 热交换翅板用高塑性铝合金及其加工工艺
CN106181126A (zh) * 2015-05-05 2016-12-07 播磨化成株式会社 热交换器用构件、钎焊用组合物及热交换器
CN105331852A (zh) * 2015-10-15 2016-02-17 华峰日轻铝业股份有限公司 超薄高强度铝合金翅片材料及其制备方法和应用
CN106091741A (zh) * 2016-06-17 2016-11-09 安徽天祥空调科技有限公司 一种高强度的汽车高效全铝换热器及其生产工艺
JP7023126B2 (ja) * 2018-01-31 2022-02-21 ダイキン工業株式会社 熱交換器
JP6932102B2 (ja) * 2018-03-29 2021-09-08 株式会社Uacj 排気再循環システム用アルミニウム合金製熱交換器
CN114060139A (zh) * 2021-07-30 2022-02-18 艾酷沃(山东)新材料有限公司 一种能够调节风量的汽车散热器及其制造方法
WO2024009131A1 (en) * 2022-07-07 2024-01-11 Jahdi Ahad Aluminum radiator with high efficiency temperature control and regulation

Citations (19)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3878871A (en) * 1973-11-12 1975-04-22 Saliss Aluminium Ltd Corrosion resistant aluminum composite
US4911351A (en) * 1986-11-17 1990-03-27 Furukawa Aluminum Co., Ltd. Method of manufacturing heat-exchanger
US4991647A (en) * 1989-06-19 1991-02-12 Honda Giken Kogyo Kabushiki Kaisha Heat exchanger
JPH04198694A (ja) * 1990-11-29 1992-07-20 Sumitomo Light Metal Ind Ltd 耐食性及び伝熱性にすぐれた熱交換器
US5260142A (en) * 1990-12-28 1993-11-09 Honda Giken Kogyo Kabushiki Kaisha Corrosion-resistant clad material made of aluminum alloys
US5732767A (en) * 1996-01-24 1998-03-31 Modine Manufacturing Co. Corrosion resistant heat exchanger and method of making the same
US6193140B1 (en) * 1997-01-24 2001-02-27 Alcan International Limited Heat exchanger core based on aluminum and process for producing the same
US20010054496A1 (en) * 2000-06-27 2001-12-27 Yoshiharu Kajikawa Heat exchanger having plural tubes connected to header tanks by brazing
US20020007881A1 (en) * 1999-02-22 2002-01-24 Ole Daaland High corrosion resistant aluminium alloy
US6451453B1 (en) * 1999-08-12 2002-09-17 Pechiney Rhenalu Aluminum alloy strip or tube for the manufacture of brazed heat exchangers
US6656296B2 (en) * 1999-12-23 2003-12-02 Reynolds Metals Company Aluminum alloys with optimum combinations of formability, corrosion resistance, and hot workability, and methods of use
US20040040153A1 (en) * 2000-09-25 2004-03-04 Koji Ashida Method for manufacturong heat exchanger
US20040050540A1 (en) * 2001-01-16 2004-03-18 Soichi Kato Heat exchanger
US20050006065A1 (en) * 2003-05-06 2005-01-13 Mitsubishi Aluminum Co., Ltd. Heat exchanger tube
US6939417B2 (en) * 2000-03-08 2005-09-06 Alcan International Limited Aluminum alloys having high corrosion resistance after brazing
US20060102328A1 (en) * 2004-11-16 2006-05-18 Denso Corporation Aluminum heat exchanger and manufacturing method thereof
US20060162918A1 (en) * 2001-06-18 2006-07-27 Showa Denko K.K. Evaporator, manufacturing method of the same, header for evaporator and refrigeration system
US7250223B2 (en) * 2003-06-06 2007-07-31 Denso Corporation Aluminum heat exchanger excellent in corrosion resistance
US20080050269A1 (en) * 2006-08-24 2008-02-28 Furukawa-Sky Aluminum Corp. Aluminum piping material for automobile heat exchanger

Family Cites Families (30)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0191962A (ja) * 1987-06-12 1989-04-11 Mitsubishi Alum Co Ltd Ａｌ熱交換器の製造方法
JP2768393B2 (ja) * 1992-02-25 1998-06-25 住友軽金属工業 株式会社 ろう付け後の強度および犠牲陽極効果にすぐれた熱交換器フィン材用アルミニウム合金
US5251374A (en) * 1992-09-01 1993-10-12 Gary A. Halstead Method for forming heat exchangers
JPH07207393A (ja) * 1993-09-08 1995-08-08 Furukawa Electric Co Ltd:The 熱交換器用アルミニウム合金ブレージングシートおよびアルミニウム合金製熱交換器の製造方法
JPH08120379A (ja) * 1994-10-14 1996-05-14 Mitsubishi Alum Co Ltd ろう付用アルミニウム合金製部材
JP3505825B2 (ja) * 1994-11-28 2004-03-15 三菱アルミニウム株式会社 ろう付け後に高い疲労強度を保持するＡｌ合金製熱交換器フィン材
EP1090745B1 (en) * 1999-10-04 2002-06-19 Denso Corporation Aluminum alloy clad material for heat exchangers exhibiting high strength and excellent corrosion resistance
JP2002103027A (ja) 2000-09-22 2002-04-09 Mitsubishi Alum Co Ltd 熱交換器の製造方法
JP3786840B2 (ja) * 2001-01-16 2006-06-14 株式会社ヴァレオサーマルシステムズ 熱交換器
JP2002256402A (ja) * 2001-02-28 2002-09-11 Mitsubishi Alum Co Ltd 熱交換器のフィン材の製造方法
JP2002277187A (ja) 2001-03-22 2002-09-25 Mitsubishi Alum Co Ltd 熱交換器用ヘッダーパイプ及びそれを利用した熱交換器
JP2002294377A (ja) 2001-03-29 2002-10-09 Kobe Steel Ltd ろう付け用アルミニウム合金複合材
JP4554144B2 (ja) * 2001-06-18 2010-09-29 昭和電工株式会社 蒸発器
JP2004042086A (ja) * 2002-07-11 2004-02-12 Denso Corp アルミニウム材をろう付けするためのろう材粉末および該ろう材粉末を用いるアルミニウム材のろう付け方法
JP4440550B2 (ja) * 2003-01-31 2010-03-24 株式会社ティラド アルミニューム製熱交換器
JP2004330223A (ja) 2003-05-02 2004-11-25 Mitsubishi Materials Corp 粉末成形方法、バルブシートおよびその製造方法
JP2004330266A (ja) 2003-05-09 2004-11-25 Denso Corp 積層型熱交換器の製造方法
JP2004339582A (ja) * 2003-05-16 2004-12-02 Mitsubishi Alum Co Ltd 熱交換器用チューブ及び熱交換器
JP4284515B2 (ja) 2003-10-23 2009-06-24 株式会社デンソー 熱交換器用アルミニウム合金押出ヘッダータンクおよびこのヘッダータンクを用いた熱交換器
US7438121B2 (en) 2004-02-12 2008-10-21 Showa Denko K.K. Heat exchanger and method for manufacturing the same
JP4290625B2 (ja) 2004-09-15 2009-07-08 三菱アルミニウム株式会社 アルミニウム合金押出材を用いた熱交換器用ヘッダータンク及びそれを備えた熱交換器
JP2006255755A (ja) 2005-03-17 2006-09-28 Mitsubishi Alum Co Ltd ろう付用アルミニウム合金材およびアルミニウム合金材のろう付方法
JP2006348358A (ja) * 2005-06-17 2006-12-28 Mitsubishi Alum Co Ltd 熱交換器用アルミニウム合金押出材、及びそれを用いた熱交換器用扁平多穴管と熱交換器用ヘッダー
JP4541252B2 (ja) 2005-08-18 2010-09-08 三菱アルミニウム株式会社 ラジエータチューブ用アルミニウム合金板材
DE602006017415D1 (de) 2005-08-31 2010-11-18 Showa Denko Kk Plattierplatte und herstellungsverfahren dafür
JP2007147160A (ja) 2005-11-28 2007-06-14 Mitsubishi Alum Co Ltd 熱交換器用ヘッダーパイプ及び熱交換器
JP4649326B2 (ja) 2005-12-26 2011-03-09 株式会社神戸製鋼所 熱交換器のヘッダ部材およびタンク部材用アルミニウムクラッド材
JP4111456B1 (ja) 2006-12-27 2008-07-02 株式会社神戸製鋼所 熱交換器用アルミニウム合金ブレージングシート
JP5233137B2 (ja) 2007-03-15 2013-07-10 Ｄｉｃ株式会社 Ｏｃｂ液晶表示素子
JP4473908B2 (ja) 2007-12-27 2010-06-02 株式会社神戸製鋼所 熱交換器用アルミニウム合金クラッド材、および、その製造方法

Patent Citations (19)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3878871A (en) * 1973-11-12 1975-04-22 Saliss Aluminium Ltd Corrosion resistant aluminum composite
US4911351A (en) * 1986-11-17 1990-03-27 Furukawa Aluminum Co., Ltd. Method of manufacturing heat-exchanger
US4991647A (en) * 1989-06-19 1991-02-12 Honda Giken Kogyo Kabushiki Kaisha Heat exchanger
JPH04198694A (ja) * 1990-11-29 1992-07-20 Sumitomo Light Metal Ind Ltd 耐食性及び伝熱性にすぐれた熱交換器
US5260142A (en) * 1990-12-28 1993-11-09 Honda Giken Kogyo Kabushiki Kaisha Corrosion-resistant clad material made of aluminum alloys
US5732767A (en) * 1996-01-24 1998-03-31 Modine Manufacturing Co. Corrosion resistant heat exchanger and method of making the same
US6193140B1 (en) * 1997-01-24 2001-02-27 Alcan International Limited Heat exchanger core based on aluminum and process for producing the same
US20020007881A1 (en) * 1999-02-22 2002-01-24 Ole Daaland High corrosion resistant aluminium alloy
US6451453B1 (en) * 1999-08-12 2002-09-17 Pechiney Rhenalu Aluminum alloy strip or tube for the manufacture of brazed heat exchangers
US6656296B2 (en) * 1999-12-23 2003-12-02 Reynolds Metals Company Aluminum alloys with optimum combinations of formability, corrosion resistance, and hot workability, and methods of use
US6939417B2 (en) * 2000-03-08 2005-09-06 Alcan International Limited Aluminum alloys having high corrosion resistance after brazing
US20010054496A1 (en) * 2000-06-27 2001-12-27 Yoshiharu Kajikawa Heat exchanger having plural tubes connected to header tanks by brazing
US20040040153A1 (en) * 2000-09-25 2004-03-04 Koji Ashida Method for manufacturong heat exchanger
US20040050540A1 (en) * 2001-01-16 2004-03-18 Soichi Kato Heat exchanger
US20060162918A1 (en) * 2001-06-18 2006-07-27 Showa Denko K.K. Evaporator, manufacturing method of the same, header for evaporator and refrigeration system
US20050006065A1 (en) * 2003-05-06 2005-01-13 Mitsubishi Aluminum Co., Ltd. Heat exchanger tube
US7250223B2 (en) * 2003-06-06 2007-07-31 Denso Corporation Aluminum heat exchanger excellent in corrosion resistance
US20060102328A1 (en) * 2004-11-16 2006-05-18 Denso Corporation Aluminum heat exchanger and manufacturing method thereof
US20080050269A1 (en) * 2006-08-24 2008-02-28 Furukawa-Sky Aluminum Corp. Aluminum piping material for automobile heat exchanger

Cited By (43)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8640766B2 (en) 2003-05-06 2014-02-04 Mitsubishi Aluminum Co., Ltd. Heat exchanger tube
US9283633B2 (en) 2003-05-06 2016-03-15 Mitsubishi Aluminum Co. Ltd. Heat exchanger tube precursor and method of producing the same
US8978411B2 (en) 2009-06-05 2015-03-17 Denso Corporation Cold-storage heat exchanger
US10132549B2 (en) 2009-06-05 2018-11-20 Denso Corporation Cold-storage heat exchanger
US20140090826A1 (en) * 2009-06-05 2014-04-03 Denso Corporation Cold-Storage Heat Exchanger
US11029073B2 (en) 2009-06-05 2021-06-08 Denso Corporation Cold-storage heat exchanger
US20100307180A1 (en) * 2009-06-05 2010-12-09 Denso Corporation Cold-storage heat exchanger
US8973396B2 (en) * 2009-06-05 2015-03-10 Denso Corporation Cold-storage heat exchanger
US8973395B2 (en) 2009-06-05 2015-03-10 Denso Corporation Cold-storage heat exchanger
US9032757B2 (en) 2009-06-05 2015-05-19 Denso Corporation Cold-storage heat exchanger
US20120292001A1 (en) * 2009-11-25 2012-11-22 Matthias Traub Soldered aluminum heat exchanger
US9328977B2 (en) 2010-03-02 2016-05-03 Mitsubishi Aluminum Co., Ltd. Aluminum alloy heat exchanger
US8945721B2 (en) 2010-03-02 2015-02-03 Mitsubishi Aluminum Co., Ltd. Aluminum alloy heat exchanger
US20110240280A1 (en) * 2010-03-31 2011-10-06 Kabushiki Kaisha Kobe Seiko Sho (Kobe Steel, Ltd.) Aluminum alloy brazing sheet and heat exchanger
US20140158330A1 (en) * 2011-08-09 2014-06-12 Toyota Jidosha Kabushiki Kaisha Heat exchanger
US20150136374A1 (en) * 2012-01-31 2015-05-21 Michael Alan Burns Steam generation
US9952003B2 (en) * 2012-01-31 2018-04-24 Clean Thermodynamic Energy Conversion Ltd Steam generation
US10845131B2 (en) 2012-01-31 2020-11-24 Clean Thermodynamic Energy Conversion Ltd Steam generation
US10386134B2 (en) 2012-03-27 2019-08-20 Mitsubishi Aluminum Co., Ltd. Heat transfer tube and method for producing same
US20150060035A1 (en) * 2012-03-27 2015-03-05 Mitsubishi Aluminum Co., Ltd. Heat transfer tube and method for producing same
US9857128B2 (en) * 2012-03-27 2018-01-02 Mitsubishi Aluminum Co., Ltd. Heat transfer tube and method for producing same
US9523540B2 (en) * 2012-04-03 2016-12-20 Keihin Thermal Technology Corporation Heat exchanger with header tank including tank constituting members
US20130255926A1 (en) * 2012-04-03 2013-10-03 Keihin Thermal Technology Corporation Heat exchanger and method of manufacturing the same
US9534851B2 (en) * 2013-06-07 2017-01-03 Keihin Thermal Technology Corporation Method for anticorrosion treatment of outer surface of heat exchange tube made of aluminum extrusion and method for producing heat exchanger
US20140360017A1 (en) * 2013-06-07 2014-12-11 Keihin Thermal Technology Corporation Method for anticorrosion treatment of outer surface of heat exchange tube made of aluminum extrusion and method for producing heat exchanger
US20160298914A1 (en) * 2013-10-15 2016-10-13 Uacj Corporation Aluminum Alloy Heat Exchanger
US20160131445A1 (en) * 2013-10-31 2016-05-12 Mitsubishi Electric Corporation Lifetime diagnosis component for anticorrosive coating, heat exchanger, refrigeration-and-air-conditioning apparatus
EP3023728A1 (en) * 2013-10-31 2016-05-25 Mitsubishi Electric Corporation Corrosion resistance life diagnosis component, heat exchanger, and refrigeration and air conditioning device
US9964367B2 (en) * 2013-10-31 2018-05-08 Mitsubishi Electric Corporation Lifetime diagnosis component for anticorrosive coating, heat exchanger, refrigeration-and-air-conditioning apparatus
EP3023728A4 (en) * 2013-10-31 2017-05-03 Mitsubishi Electric Corporation Corrosion resistance life diagnosis component, heat exchanger, and refrigeration and air conditioning device
DE102014206612A1 (de) * 2014-04-04 2015-10-29 Mahle International Gmbh Wärmetauscher
US10401097B2 (en) 2014-04-04 2019-09-03 Mahle International Gmbh Heat exchanger
US10661395B2 (en) 2014-07-30 2020-05-26 Uacj Corporation Aluminum-alloy brazing sheet
US10563924B2 (en) * 2014-09-08 2020-02-18 Mitsubishi Electric Corporation Heat exchanger and method for manufacturing plate-shaped fins for heat exchanger
US10150186B2 (en) 2014-12-11 2018-12-11 Uacj Corporation Brazing method
US10473411B2 (en) 2014-12-17 2019-11-12 Carrier Corporation Aluminum alloy finned heat exchanger
US11320217B2 (en) 2016-01-14 2022-05-03 Uacj Corporation Heat exchanger and method of manufacturing the same
US11007609B2 (en) 2016-11-29 2021-05-18 Uacj Corporation Brazing sheet and manufacturing method thereof
US10640852B2 (en) 2017-03-30 2020-05-05 Uacj Corporation Aluminum-alloy clad material and method of manufacturing the same
CN108195207A (zh) * 2018-03-06 2018-06-22 北京中热能源科技有限公司 一种防垢防腐的干湿式冷凝器
US20200033073A1 (en) * 2018-07-25 2020-01-30 Mahle International Gmbh Heat exchanger
CN112457729A (zh) * 2019-09-06 2021-03-09 现代自动车株式会社 用于热交换管的涂料组合物、热交换管及涂覆方法
US11603471B2 (en) 2019-09-06 2023-03-14 Hyundai Motor Company Coating composition for tube of heat exchanger and coating method for tube of heat exchanger using the same

Also Published As

Publication number Publication date
JP2010085081A (ja) 2010-04-15
CN101676667A (zh) 2010-03-24
EP2159528A2 (en) 2010-03-03
EP2159528A3 (en) 2013-12-25
CN101676667B (zh) 2015-08-19
EP2159528B1 (en) 2015-11-04
JP5548411B2 (ja) 2014-07-16

Similar Documents

Publication Publication Date Title
US20100051247A1 (en) Heat exchanger made of aluminum alloy and method of producing same
EP2543951B1 (en) Heat exchanger constituted of aluminum alloy
JP5906113B2 (ja) 熱交換器用押出伝熱管と熱交換器および熱交換器用押出伝熱管の製造方法
JP5302751B2 (ja) 熱交換器用アルミニウム合金クラッド材
JP4993440B2 (ja) ろう付け性に優れた熱交換器用高強度アルミニウム合金クラッド材
JP5619538B2 (ja) 細流路インナーフィンを有する熱交換器のフラックスレスろう付け方法およびそれに用いるアルミニウムクラッド材
EP1475598A2 (en) Heat exchange tube
WO2016080433A1 (ja) 熱交換器用アルミニウム合金クラッド材
WO2017141921A1 (ja) アルミニウム合金ブレージングシート及びその製造方法、ならびに、当該ブレージングシートを用いた自動車用熱交換器の製造方法
JP2005232506A (ja) 熱交換器用アルミニウム合金クラッド材
JP4993439B2 (ja) ろう付け性に優れた熱交換器用高強度アルミニウム合金クラッド材
EP3670688A1 (en) Aluminum alloy-brazing sheet for heat exchanger
EP3663423B1 (en) Aluminum alloy brazing sheet for heat exchanger
JP2012057183A (ja) アルミニウム合金製クラッド材およびそれを用いた熱交換器
JP2005232507A (ja) 熱交換器用アルミニウム合金クラッド材
JP4954551B2 (ja) ろう付時のエロージョンが抑制されたアルミニウムろう合金及びそれを用いたブレージングシート、熱交換器用ヘッダーパイプ並びに熱交換器
JP6968598B2 (ja) 耐食性に優れたアルミニウム合金製熱交換器の製造方法およびアルミニウム合金製熱交換器
JP5159709B2 (ja) 熱交換器用チューブ向けアルミニウム合金クラッド材およびそれを用いた熱交換器コア
WO2021063172A1 (zh) 用于换热器的翅片和换热器
JP4263160B2 (ja) アルミニウム合金クラッド材並びにそれを用いた熱交換器用チューブ及び熱交換器
JP6066299B2 (ja) アルミニウム製熱交換器
JP5847443B2 (ja) ろう付性に優れるブレージングシートおよびろう付品の製造方法
WO2023228917A1 (ja) 熱交換器及びその製造方法
CN117002104A (zh) 一种用于换热器的换热管及换热器

Legal Events

Date Code Title Description
AS Assignment

Owner name: CALSONIC KANSEI CORPORATION,JAPAN

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:SOGABE, MASAHIRO;FUNATSU, TAKUMI;SHINHAMA, MASAYOSHI;AND OTHERS;SIGNING DATES FROM 20090915 TO 20091020;REEL/FRAME:023462/0052

Owner name: MITSUBISHI ALUMINUM CO., LTD.,JAPAN

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:SOGABE, MASAHIRO;FUNATSU, TAKUMI;SHINHAMA, MASAYOSHI;AND OTHERS;SIGNING DATES FROM 20090915 TO 20091020;REEL/FRAME:023462/0052

STCB Information on status: application discontinuation

Free format text: ABANDONED -- FAILURE TO RESPOND TO AN OFFICE ACTION