Abstract: An aluminum alloy brazing sheet including a core material, a sacrificial material provided on one surface of the core material, a brazing filler material provided on the other surface side of the core material, and an intermediate layer provided between the core material and the brazing filler material. The core material contains Si: 0.30 to 1.00 mass %, Mn: 0.50 to 2.00 mass %, Cu: 0.60 to 1.20 mass %, Mg: 0.05 to 0.80 mass %, and Al. The sacrificial material contains Si: 0.10 to 1.20 mass %, Zn: 2.00 to 7.00 mass %, Mn: 0.40 mass % or less, and Al. The intermediate layer contains Si: 0.05 to 1.20 mass %, Mn: 0.50 to 2.00 mass %, Cu: 0.10 to 1.20 mass %, and Al.

Abstract: An aluminum alloy fin material for heat exchanger use having a 35 to 50 ?m thickness, a small springback at the time of corrugation, a suitable strength before brazing enabling easy fin formation, a high strength after brazing, and excellent erosion resistance, self corrosion resistance, and sacrificial anodic effect and a method of production of the same are provided. A fin material containing, by mass %, Si: 0.9 to 1.2%, Fe: 0.8 to 1.1%, Mn: 1.1 to 1.4%, and Zn: 0.9 to 1.1%, further limiting the impurity Mg to 0.05% or less, Cu to 0.03% or less, and ([Si]+[Fe]+2[Mn])/3 to 1.4% to 1.6%, and having a balance of unavoidable impurities and Al. A method of production prescribing hot rolling, cold rolling, intermediate annealing, and final cold rolling.

Abstract: A fin for a heat exchanger includes a flat portion having an upstream flat part and a downstream flat part parallel to a flow direction of a fluid. Multiple louvers are arranged in the flow direction. A fluid-turning part including a surface approximately parallel to the flow direction is arranged between two of the multiple louvers. A first portion of the louvers located upstream of the fluid-turning part are inclined in a direction opposite from a second portion of the louvers located downstream of the fluid-turning part. The first and second portion of the louvers include first louvers and second louvers. The first louvers are inclined from the flat portion at a first inclined angle larger than a second inclined angle at which the second louvers are inclined from the flat portion. The second louvers are arranged adjacent to the fluid-turning part.

Abstract: An aluminum alloy fin material for heat exchanger use having a 35 to 50 ?m thickness, a small springback at the time of corrugation, a suitable strength before brazing enabling easy fin formation, a high strength after brazing, and excellent erosion resistance, self corrosion resistance, and sacrificial anodic effect and a method of production of the same are provided. A fin material containing, by mass %, Si: 0.9 to 1.2%, Fe: 0.8 to 1.1%, Mn: 1.1 to 1.4%, and Zn: 0.9 to 1.1%, further limiting the impurity Mg to 0.05% or less, Cu to 0.03% or less, and ([Si]+[Fe]+2[Mn])/3 to 1.4% to 1.6%, and having a balance of unavoidable impurities and Al. A method of production prescribing hot rolling, cold rolling, intermediate annealing, and final cold rolling.

Abstract: A heat exchanger has a flat tube (10) having a curved portion (13). A part of the curved portion (13) is formed by overlapping an outer rim (22) on an inner rim (21). The inner rim (21) has a small curvature region (102). The small curvature region (102) is inclined to a flat plate portion (11), and is defined by a radius larger than a difference between a half of a thickness of the flat tube (10) and a thickness of the outer rim (22). The small curvature region (102) is not beyond a center line (C1) in a thickness of the flat tube (10). The outer rim (22) extends beyond the center line (C1). The outer rim (22) has an end face (22a) placed on the small curvature region (102). The flat tube (10) has flared portions (15, 16) expanded at insertion holes (54).

Abstract: A heat exchanger includes tubes layered in a layering direction, a side plate arranged most outside of the tubes in the layering direction, and a core plate extending in the layering direction. The side plate has an end portion in a longitudinal direction, and the core plate has a wall portion extending in the longitudinal direction. The end portion of the side plate has a brazing section brazed to an outer face of the wall portion of the core plate, and the end portion of the side plate has a through hole located in the brazing section.

Abstract: A tube for a heat exchanger is formed by bending a three-layer clad material of an aluminum alloy to have an overlapped portion. The three-layer clad material is formed by a core material layer containing Mg not smaller than 0.2 wt % after brazing, a brazing material layer on one surface of the core material layer, and a high melting-point material layer on the other surface of the core material layer. The brazing material layer has a thickness not smaller than 25 ?m before the brazing, and has a melting point lower than 600° C. The high melting-point material layer has a melting point equal to or higher than 600° C. In addition, the brazing material layer and the high melting-point material layer opposite to each other in the overlapped portion are bonded by the brazing at a temperature not lower than 450° C. for a time within 12 minutes.

Abstract: A fin for a heat exchanger includes a flat portion parallel to a flow direction of a fluid, multiple louvers cut and inclined from the flat portion and arranged in the flow direction, and a fluid-turning part arranged between two of the louvers adjacent to each other to be parallel to the flow direction. The louvers located upstream of the fluid-turning part are opposite from the louvers located downstream of the fluid-turning part in an inclination direction. The louvers include at least first louvers and second louvers. The first louvers are inclined from the flat portion at a first inclined angle larger than a second inclined angle at which the second louvers are inclined from the flat portion. The second louvers are arranged adjacent to the fluid-turning part.

Abstract: Tubes extend in a first direction and are stacked in a second direction that is perpendicular to the first direction. A side plate is located on an outer side of the tubes in the second direction. A core plate extends in the second direction, and longitudinal end portions of the tubes are joined to the core plate. A through-hole extends through a bent portion of a holding claw of the core plate. A projection is formed in a side plate end portion of the side plate to project in the first direction. The projection is inserted through the through-hole of the holding claw.

Abstract: An aluminum alloy brazing sheet having high strength comprising: a core alloy; an Al—Si-based filler alloy cladded on one side or both sides of the core alloy, wherein the core alloy is composed of an aluminum alloy containing 0.3-1.2% (mass %, the same applies the below) Si, 0.05-0.4% Fe, 0.3-1.2% Cu, 0.3-1.8% Mn, 0.05-0.6% Mg, and containing one or more elements selected from the group consisting of 0.02-0.3% Ti, 0.02-0.3% Zr, 0.02-0.3% Cr and 0.02-0.3% V, the balance of Al and unavoidable impurities; and wherein, after the aluminum alloy brazing sheet is subjected to brazing, the core alloy features a metallic structure in which a density of intermetallic compounds having a grain diameter of at least 0.1 ?m is at most ten grains per ?m2.

Abstract: A heat exchanger includes tubes layered in a layering direction, a side plate arranged most outside of the tubes in the layering direction, and a core plate extending in the layering direction. The side plate has an end portion in a longitudinal direction, and the core plate has a wall portion extending in the longitudinal direction. The end portion of the side plate has a brazing section brazed to an outer face of the wall portion of the core plate, and the end portion of the side plate has a through hole located in the brazing section.

Abstract: A tube for a heat exchanger is formed by bending a three-layer clad material of an aluminum alloy to have an overlapped portion. The three-layer clad material is formed by a core material layer containing Mg not smaller than 0.2 wt % after brazing, a brazing material layer on one surface of the core material layer, and a high melting-point material layer on the other surface of the core material layer. The brazing material layer has a thickness not smaller than 25 ?m before the brazing, and has a melting point lower than 600° C. The high melting-point material layer has a melting point equal to or higher than 600° C. In addition, the brazing material layer and the high melting-point material layer opposite to each other in the overlapped portion are bonded by the brazing at a temperature not lower than 450° C. for a time within 12 minutes.

Abstract: An aluminum alloy brazing sheet which has a clad of a sacrificial anode material/a core alloy/an intermediate material/a filler alloy, wherein number density ratios N1/N2 and N1/N3 each are 1.5 or more, in which a number density ((the number of grains)/?m3) of an intermetallic compound having a sphere-equivalent grain diameter of 0.1 ?m or less present in the core alloy, the intermediate material, and the sacrificial anode material, is represented by N1, N2, and N3, respectively.

Abstract: A heat exchanger has a flat tube (10) having a curved portion (13). A part of the curved portion (13) is formed by overlapping an outer rim (22) on an inner rim (21). The inner rim (21) has a small curvature region (102). The small curvature region (102) is inclined to a flat plate portion (11), and is defined by a radius larger than a difference between a half of a thickness of the flat tube (10) and a thickness of the outer rim (22). The small curvature region (102) is not beyond a center line (C1) in a thickness of the flat tube (10). The outer rim (22) extends beyond the center line (C1). The outer rim (22) has an end face (22a) placed on the small curvature region (102). The flat tube (10) has flared portions (15, 16) expanded at insertion holes (54).

Abstract: A heat exchanger includes tubes, a core plate connected to the tubes, a tank connected to the core plate to be in communication with the tubes and a sealing member sealing a connecting portion between the core plate and the tank. The core plate has a groove portion including at least a base wall and an inner side wall to define a groove having a loop shape. The sealing member is disposed in the groove portion to be in contact with the inner side wall at least at two opposite locations of the loop shape. Alternatively, the sealing member is disposed in the groove portion to be in contact with at least one of the inner side wall and an outer side wall opposed to the inner side wall, and a substantially middle portion of a width of the sealing member is pressed by a projection of the tank.

Abstract: An aluminum alloy brazing sheet having high strength comprising: a core alloy; an Al—Si-based filler alloy cladded on one side or both sides of the core alloy, wherein the core alloy is composed of an aluminum alloy containing 0.3-1.2% (mass %, the same applies the below) Si, 0.05-0.4% Fe, 0.3-1.2% Cu, 0.3-1.8% Mn, 0.05-0.6% Mg, and containing one or more elements selected from the group consisting of 0.02-0.3% Ti, 0.02-0.3% Zr, 0.02-0.3% Cr and 0.02-0.3% V, the balance of Al and unavoidable impurities; and wherein, after the aluminum alloy brazing sheet is subjected to brazing, the core alloy features a metallic structure in which a density of intermetallic compounds having a grain diameter of at least 0.1 ?m is at most ten grains per ?m2.

Abstract: In a corrugated fin which is formed and bent into a wave-form, a plurality of both-side-cut-louvers 8, which are laminated on each other and formed into a group, and one-side-cut-louvers 7, which are arranged at end portions of the group of both-side-cut-louvers 8, are formed being raised, and a cross-section in the louver laminating direction of at least one of the one-side-cut-louvers 7 is formed into a substantial V-shape. An inclined face 70 of the one-side-cut-louver 7 adjoining the both-side-cut-louver 8 is made to cross a centerline in the fin thickness direction and a length of the inclined face 70 is made to be the same as that of the inclined face of the adjoining both-side-cut-louver 8.

Abstract: A method of manufacturing a header tank for a heat exchanger includes forming a first engagement portion in a core plate, placing a tank body relative to a base portion of the core plate, and moving a first wall portion toward the tank body such that the first engagement portion is engaged with the tank body. In the forming, a portion of the core plate is bent, the portion extending from the first wall portion. In the placing, the tank body is placed such that an opening of the tank body is covered by the base portion such that a tank inner space is defined. The first engagement portion is engaged with the tank body by moving the first wall portion toward the tank body.

Abstract: A heat exchanger and a manufacture method thereof are provided. Before a tank body and a core plate of a header tank of the heat exchanger are fastened to each other, a gel seal material or a liquid seal material is applied to at least one of a seal surface of the core plate and that of the tank body and hardened. Thus, a seal member which adheres to the seal surface due to the tackiness of the seal member is formed. The core plate and the tank body are fastened to each other in such a state that the part between the seal surface of the core plate and that of the tank body are sealed by the seal member having been hardened. Accordingly, the seal member can be restricted of twisting and position-deviating when the core plate and the tank body are fastened to each other.

Abstract: A heat exchanger comprising: a core portion including a plurality of tubes; a pair of header tanks communicating with the tubes; and a pair of inserts arranged substantially parallel to the length of the tubes, and in such a manner as to contact the core portion at the ends of the core portion to transfer the heat from the core portion, and having the ends thereof supported on the header tanks; wherein a stress absorber to absorb the stress generated along the length of each insert is formed in the insert; wherein the stress absorber is formed over each insert from the upstream side to the downstream side in the air flow; and wherein the stress absorber is arranged in such a manner that the most upstream end and the most downstream end thereof in the air flow are not superposed, one on the other, along the direction of air flow.