Abstract: A heat sink designed as a heat pipe has an interior space in a body of the heat sink that is closed toward the outside. The interior space has at least one vapor channel and at least one fluid space connected with the vapor space and having a porous or capillary structure. The heat pipe is made using the DCB process to connect each end of posts within the interior space directly with one of the two opposing walls forming the interior space.

Abstract: A method of making a heat pipe includes the steps of: providing a mandrel, a capillary wick and a straight tubular shell; inserting the mandrel and the capillary wick into the shell; cramming powder into the shell, wherein the powder can be sintered between the shell and the mandrel; sintering the shell having the mandrel, the capillary wick and the powder therein; and drawing the mandrel out of the shell and filling working media into the pipe, and vacuuming and sealing the pipe. The mandrel defines a longitudinal slot therein, and the capillary wick is positioned in the slot.

Abstract: In a parallel flow heat exchanger having an inlet manifold connected to an outlet manifold by a plurality of parallel channels, a spirally shaped insert is disposed within the refrigerant flow path in the inlet manifold such that a swirling motion is imparted to the refrigerant flow in the manifold so as to cause a more uniform distribution of refrigerant to the individual channels. Various embodiments of the spirally shaped inserts are provided, including inserts designed for the internal flow of refrigerant therethrough and/or the external flow of refrigerant thereover.

Abstract: A heat-exchange medium for use in a regenerative thermal oxidizer has a coating of potassium aluminum silicate which prevents the build-up of silicon dioxide from processed gas on the surface of the ceramic heat-exchange media.

Abstract: In a heat exchanger, a core portion includes a plurality of plate fins each shaped like a flat plate and a plurality of tubes in which a fluid flows and each of which is inserted into each of the plate fins to be mechanically bonded thereto. Further, an end portion in a longitudinal direction of each of the tubes is bonded to a header plate which constructs a part of a header tank. The manufacturing method for this heat exchanger includes inserting the tube into the plate fins; expanding the tube to attach the plate fins; connect the tube into the header plate; and vibrate the tube with respect to the plate while applying a load to the tube in the direction of the header plate.

Abstract: A refrigerant leak-preventive structure in a heat exchanger is described. The refrigerant leak-preventive structure includes a tube group having refrigerant leak-preventive grooves recessed at ends of the fin-tubes group, and headers having refrigerant leak-preventive projections formed by double injection molding solution introduced into and cooled in the refrigerant leak-preventive grooves when being coupled with the both ends of the tube group by a double injection molding.

Abstract: A heat exchanger including a header having a plurality of header openings with rigid tubes that may be made of plastic are inserted in the openings. The tubes are sealed to the header to prevent leakage between the header and the tubes to prevent water and air leakage between the wet, scavenger air stream flowing through the tubes and a dry air stream flowing around the tubes. A method of making the heat exchanger includes providing the openings with a flange and uses an interference fit between the rigid heat exchange tubes and the header openings. A self-leveling sealant may be used to seal the heat exchanger tubes to the header using, for example, a paint roller and/or a paint sprayer.

Abstract: A manufacturing method for a cooling unit that includes a cooling plate in which a cooling fluid flows, the cooling plate having a cooling pipe through which the cooling fluid flows, and a pair of tabular members arranged to be opposed to each other across the cooling pipe, the manufacturing method for a cooling unit includes: forming a groove in which the cooling pipe is housed at least in one opposed surface of the pair of tabular members; combining the pair of tabular members while housing the cooling pipe in the groove; and filling a heat conduction material in a gap between the groove and the cooling pipe.

Abstract: A method for producing a condenser for a thermal power plant is provided. First, the production method includes fitting a condenser tube in a carrier for a condenser tube bundle of the condenser. Then, the fitted condenser tube is coated with a hydrophobic coating. Coating the fitted condenser tube includes positioning a spray mechanism on the carrier, spraying on the hydrophobic coating using a spray mechanism, and moving the spray mechanism during spraying at a uniform rate. In another aspect, a device is provided. Also, a condenser is provided in an aspect.

Abstract: A heat sink for integrated circuits is limited substantially to heat transfer fins on one or more heat pipe tubes, the tube(s) functioning as a base for the heat sink. The heat pipe tube has a flattened oval cross-section and can snap-fit in openings through the fins. The tube is exposed on one side of the heat sink for contact with the heat generating circuit. The fins can be flat or irregular and can have a collar engaging the heat pipe tube. In one example, the heat pipe runs perpendicular to vertical fins along the bottom of a standing fin stack. In another embodiment two U-shaped heat pipe tubes carry a layered stack, the bottom of the U-shapes being presented under the lowermost in the stack. A clamp urges the heat sink against the heat source.

Abstract: Disclosed is a tube made of a profile rolled metal product, in particular for use in heat exchangers, a rolled metal product and a method of producing the same. The tube includes a first wall and a second wall forming two opposing sides of the tube, and a plurality of reinforcing structures connecting the first and second walls and forming longitudinal passages between them. Each reinforcing structure is formed by a longitudinal ridge on the first wall projecting towards the second wall and a longitudinal ridge on the second wall protecting towards the first wall. The ridges are joined to each other at their sides.

Abstract: A method of manufacturing a cooling unit that includes a cooling plate in which a cooling fluid flows, the cooling plate having a structure in which a pair of tabular members are arranged to be opposed to each other with a cooling pipe, through which the cooling fluid flows, sandwiched between the tabular members, the manufacturing method includes: forming grooves for housing the cooling pipe in respective opposed surfaces of the pair of tabular members; forming projections projecting to inner sides of the grooves by applying an external force or joining a predetermined member to the respective opposed surfaces of the pair of tabular members; and combining each of the pair of tabular members and the cooling pipe by housing the cooling pipe in the grooves and expanding a diameter of the cooling pipe.

Abstract: A method of fabricating a condenser tube having a pre-determined tube length and multiple channels including the steps of forming an aperture in a flat strip of metal; moving the flat strip through a plurality of forming operations to fold into an enclosed tube containing channels, which channels include the aperture in their sides and bottoms; and severing the enclosed tube across the aperture to separate the enclosed tube into one condenser tube. The aperture eliminates the need for the channel sides to be severed, hence only the portion of the condenser tube enclosing the channels requires severing. Each pair of apertures is spaced from the next pair of apertures by the pre-determined tube length so that each sever produces one condensing tube of the pre-determined tube length with the apertures being divided into open notches. The invention also includes a heat exchanger utilizing the condenser tube with channel sides containing portions of the apertures.

Abstract: A heat exchanger, provided with a body with at least one flue gas channel and at least one water carrying channel, at least one burner space and at least one flue gas discharge, wherein the at least one flue gas channel extends at least partly between at least a burner space and at least one flue gas discharge and at least a portion of the at least one flue gas channel comprises at least one porous or gas-transmissive heat exchange element.

Abstract: The heat exchanger is made economically by pressure-forming cavities in relatively thick thermo-plastic panels, interleaving them with other thermo-plastic panels having separate gas flow conduit structures, and securing the panels together. Preferably, the heat exchanger is an opposed-flow-heat-exchanger giving improved heat-transfer efficiency.

Abstract: An inside regular filler layer is disposed inside a pipe where heat is exchanged between an inside and an outside of a pipe wall so as to abut an inner peripheral surface of the pipe, and an outside regular filler layer is disposed outside the pipe so as to surround the pipe and closely contact an outer peripheral surface of the pipe. The outer peripheral surface of the pipe is subjected to close contact-promoting processing in order to enhance close contacting feature between the outer peripheral surface and the outside regular filler layer. The pipe/filler unit is used for the distillation section of an internal heat exchanging type distillation column.

Abstract: A heat exchange tubing assembly including a plurality of heat exchange tubing lengths for conveying heat exchange fluid. A plurality of cross member assemblies can extend laterally across the tubing lengths and can be secured to the tubing lengths at spaced intervals along the tubing lengths. The cross member assemblies can laterally space the tubing lengths apart from each other generally along a common plane. Each cross member assembly can include a cross member having a series of mounting structures spaced along a mounting surface of the cross member at predetermined locations. A series of tubing securement members are included and can each have a tubing trapping surface for trapping a selected tubing length against the mounting surface of the cross member. The tubing securement members can be mounted to selected mounting structures on the cross member to obtain selected lateral spacing of the tubing lengths on the cross member.

Abstract: A sintering method for a wick structure of a heat pipe includes the steps of inserting a shaft inside the pipe body such that a tapered head is assembled to the shrunk end to achieve a second positioning point, wherein another end of the shaft extending to the filling tool forms a first positioning point corresponding to the clamping section. The filling tool fills a wick structure into a uniform gap defined by the shaft and the pipe body and clamped by the first positioning point and the second positioning point. The wick structure is sintered and cooled to complete a heat pipe having wick structure of uniform thickness.

Abstract: The invention relates to a pipe assembly (102) for use in a boiler. The pipe assembly (102) comprises a pipe (104) having an outer wall (106) adapted for heat exchange. The pipe (104) having heat sensing means (116) located in a recess section of the outer wall (106) thereof, wherein an internal bore (108) of the pipe (104) has a substantially constant cross section in the region of the heat sensing means (116).

Abstract: A number of flat tubes, flat tube heat exchangers, and methods of manufacturing both are described and illustrated. The flat tubes can be constructed of one, two, or more pieces of sheet material. A profiled insert integral with the flat tube or constructed from another sheet of material can be used to define multiple flow channels through the flat tube. The flat tubes can be constructed of relatively thin material, and can be reinforced with folds of the flat tube material and/or of an insert in areas subject to higher pressure and thermal stresses. Also, the relatively thin flat tube material can have a corrosion layer enabling the material to resist failure due to corrosion. Heat exchangers having such flat tubes connected to collection tubes are also disclosed, as are manners in which such tubes can be provided with fins.

Abstract: Disclosed herein is a method for manufacturing a heating panel. The method comprises preparing upper and lower moulds corresponding to the upper and lower plates, injecting a plastic material into the moulds to produce semi-manufactured products of the upper and lower plates, and bonding the semi-manufactured products of the upper and lower plates to produce the heating panel. The heating panel comprises a uniform fluid pathway formed therein, and allows uniform flow of heating fluid. The heating panel is manufactured by injection molding, thereby preventing blockage of the heating panel to ensure uniform flow of heating fluid. In addition, since the upper and lower plates are formed to a uniform thickness by injection molding, the method of the present invention enables precise forming of the heating panel, thereby allowing a constant tolerance and high quality of the heating panel.

Abstract: A heat exchanger is disclosed for the exhaust gas line of a motor vehicle including at least one exchanger tube that is formed separately and disposed in a closed housing formed separately, a coolant flowing through the housing and around the outside of the exchanger tube. An inlet and/or an outlet of the exchanger tube are located outside the housing, wherein the exchanger tube is guided through a wall of the housing at a feed-through point in a coolant- and/or exhaust gas-tight manner. Additionally, a manufacturing method for the heat exchanger and an assembly tool which can be advantageously used in the method are disclosed.

Abstract: A heat pipe (50) and a method (100) of producing the heat pipe are disclosed. The method includes the following steps: (1) inserting a mandrel (10) into a hollow metal casing (20) with a porous structure (30) combined to an outer surface of the mandrel; (2) filling powders (40) into a space formed between the hollow metal casing and the porous structure; (3) sintering the filled powders; (4) drawing the mandrel out of the hollow metal casing; and (5) sealing the hollow metal casing with a working fluid filled therein. The heat pipe produced by this method includes a composite wick structure (60) arranged in the hollow metal casing. By using this method, the mandrel can be easily drawn out of the hollow metal casing after the filled powders are sintered.

Abstract: A flexible production process for fabricating a heat pipe, having the processes of (a) performing pre-process on a heat-pipe material, (b) performing annealing process on the heat-pipe material, (c) introducing working fluid into the heat-pipe material, (d) removing non-condensable gas from the heat-pipe material, and (e) sealing the openings of the heat-pipe material. The heat-pipe material can be disposed into a laminar flow box between any of the steps (a) and (b), (b) and (c), and (c) and (d).

Abstract: The invention relates to a heat-exchanger tube structured on both sides with excellent heat transfer characteristics utilizing both outer and also inner fins and secondary grooves intersecting the inner fins. Two spaced-apart rolling tools are provided in the utilized device in order to form the outer fins of two adjacent rolling tools; the inner structure is formed by two differently profiled mandrels. The first mandrel forms in a first forming area the inner fins. The second mandrel forms in a second forming area the inventive secondary grooves into the earlier created inner fins.

Abstract: A tube for a heat exchanger is constructed of a single plate having one end portion and the other end portion in a width direction perpendicular to a tube longitudinal direction. The single plate having opposite first and second wall surfaces is bent to have a protruding portion at a position adjacent to the one end portion in the width direction and a contact portion adjacent to the protruding portion in the width direction. The protruding portion is configured to continuously extend in the longitudinal direction and to have a protruding tip on a side of the first wall surface, and the protruding tip contacts the first wall surface of a portion along the longitudinal direction. The second wall surface at the one end portion and the contact portion contacts the first wall surface at the other end portion and a position near the other end portion, respectively.

Abstract: The present invention provides a single shell-pass shell-and-tube heat exchanger with helical baffles, where within a single pitch, the helical baffles are separated into inner and outer parts along the radial direction of the shell. In the central portion of the inner space of the shell, an inner non-continuous helical form is employed; in other portion outside the central portion, doughnut shaped helical baffles with continuous curved surfaces are arranged to form an outer continuous helical baffle, and the outer helical baffles are arranged to surround the inner helical baffles. Furthermore, the present invention relates to a multiple shell-pass shell-and-tube heat exchanger with helical baffles, in which complete continuous helical baffles are provided in shell-sides other than the inner shell-pass, while non-continuous helical baffles or other flow guide means are employed in the inner shell-pass.

Abstract: A heat exchanger is formed by connecting tube-group blocks along a tube axis, where each one of tube-group blocks includes a plurality of substrates having a large number of through holes, which communicate with insides of a plurality of tubes placed between the substrates. A length of the tubes can be shortened so that the tube-group block can be formed within a predetermined size. The substrates and the tubes can be formed by injection molding or die-casting simultaneously with ease, so that the manufacturing steps of inserting the tubes and bonding the substrates can be eliminated. The heat exchanger can be available at a lower cost while it maintains excellent heat exchanging performance.

Abstract: A method for combining a heat pipe with a heat sink fin is provided, which includes the following steps: firstly, providing a heat sink fin with an opening, next, installing the heat pipe and a tin pipe into the opening, and installing the heat pipe into the tin pipe, and then, carrying out a heat treatment, so as to combine the heat pipe with the heat sink fin via the melted tin pipe.

Abstract: A method of surface treating an aluminum alloy base body of an heat exchanger which method enables an etching procedure to be carried out uniformly and quickly and a corrosion-resistant chemical conversion coating to be formed, is effected by pretreating the Al heat exchanger base body with an aqueous pre-treating liquid having a pH of 9.0 or less, etching the pretreated base body with an aqueous alkaline solution having a pH of 9.0 or more, and then subjecting the etched base body to a chemical conversion treatment or a hydrophilicity-enhancing treatment.

Abstract: A method of enhancing the heat transfer coefficient of a tube flowing a fluid in the tube in heat exchange relation with a second fluid external to the tube includes applying metal particles to an interior surface of the tube to thereby create an increased wetted area for interaction with fluid flowing through the tube; wherein the particles are applied by: providing an applicator head including an electric arc and at least one metal wire; displacing the head along the interior of the tube; feeding the wire into the electric arc as the head is displaced along the interior of the tube; melting the wire to form molten metal particles; and applying the molten metal particles about and along the length of the interior wall surface of the tube as the head is displaced along the interior of the tube.

Abstract: A weaving apparatus used to separate the tubes of a heat exchanger so that spacers that hold the tubes apart can be inserted between the tubes to increase thermal efficiency. The weaving apparatus includes a frame assembly and a weaving mechanism contained within the frame assembly. The weaving mechanism includes an alignment plate to align the tubes and separation plates to separate the tubes after they have been aligned. The weaving apparatus thus automates the step of separating the tubes of the heat exchanger so that the spacer can ready inserted between the tubes.

Abstract: A heat transfer device includes a plurality of heat transfer walls configured to separate a first fluid and a second fluid. A heat transfer enhancing system is provided to one or more heat transfer walls. The heat transfer enhancing system includes a plurality of micro turbulating particles bonded to the one or more heat transfer walls using a binding medium.

Abstract: A heat exchanger for a refrigerator with improved heat transfer efficiency by inducing turbulent flow in a refrigerant flowing along a refrigerant guiding tube. The heat exchanger for the refrigerator comprised of: the refrigerant guiding tube configured to allow the refrigerant to flow there through; a plurality of heat exchange fins disposed around an outer peripheral surface of the refrigerant guiding tube, the plurality of heat exchange fins increasing a heat exchange area of the refrigerant guiding tube; and a turbulent flow inducing member positioned in the refrigerant guiding tube, whereby the turbulent flow inducing member is configured to cause the refrigerant flowing along the refrigerant guiding tube to form a turbulent flow.

Abstract: A heat transfer device having a heat source for collecting waste heat from a heat-generating system, the heat transfer device having fins in which the shape of the sides of the fins is preferably circular according to the general expression ( x - 1 ? ) 2 + ( y - ? ? ) 2 = 1 ? 2 , where ? = h k , h is the heat transfer coefficient between the fin and the surrounding fluid, k is the thermal conductivity of the fin material, ? = q o k ? ? ? o , q o is the heat flow through the fin semi-base per unit depth and ?0 is the difference between the temperatures of the heated surface and the surrounding fluid.

Abstract: An improved tool and method for enhancing the surface of a heat transfer tube are provided. The tool, which can be easily added to existing manufacturing equipment, includes cutting bits that may be retracted with a housing. The cutting bits include a cutting edge to cut through the surface of a tube and a lifting edge to lift the surface of the tube to form protrusions. A method for enhancing the inner surface of the tube includes mounting a tool on a shaft, positioning the tool in the tube and causing relative rotation and axial movement between the tube and the tool to cut at least partially through at least one ridge formed along the surface of the tube to form ridge layers and lift the ridge layers to form protrusions.

Abstract: A method for manufacturing a heat sink for use in a heat sink fan is provided. A heat-sink base portion defining a central axis and a circumferential surface is formed. A plurality of heat-radiating fins is formed on the circumferential surface of the base portion. Each of the heat radiating fins extends away from the central axis and defines at least one radially distal edge. After the base portion and the heat-radiating fins are formed, a distal-edge protrusion or a recess is formed on or in at least one of the heat radiating fins by a machining process, so as to form partially along the envelope of the heat sink at least one discrete engagement feature.

Abstract: A fin tube assembly has a core tube of elongated transverse cross-section having rounded leading and trailing sides, opposite flat faces, and opposite open ends for flow through the tube. A plurality of fins project in opposite directions from finned areas of the opposite flat faces. The finned areas terminate short of the rounded sides of the core tube. A first internal rib extends across the interior of the core tube adjacent one rounded side and a second internal rib extends across the interior of the core tube adjacent the opposite rounded side to separate the interior of the core tube into a larger central channel between the ribs and separate side channels between each rib and the adjacent rounded side of the core tube.

Abstract: A method of manufacturing a header pipe for a heat exchanger, including (a) forming a header pipe as a single body with a vertically separating panel between first and second channels, including a plurality of slots through the pipe adapted to connect to cooling fluid tubes of a heat exchanger, (b) introducing a punch into the inside of one of the channels of the header pipe with more than one nipple facing one side of the separating panel, (c) inserting a die into the inside of the other of the channels of the header pipe with punching holes aligned with the punching nipples and the other side of the separating panel, (d) inserting a pressuring pole of a pressuring device through the header pipe slots into the one channel, and (e) moving the pressuring pole to press the punch toward the separating panel to punch more than one hole into the separating panel.

Abstract: A method for forming a heat pipe is provided comprising coating the interior surface of the vessel with a wicking material and partially saturating the wick with a working fluid. The vessel is then partially evacuated. A portion of the vessel is pinched-off so as to seal the vessel. Then, the pinched-off portion of the vessel is pressed so as to move it from a first position wherein the portion is convex to a second position wherein the portion is concave.

Abstract: A dual base plate heatsink for use in dissipating heat for electronic devices has sufficient thermal contact between fins and the base plates and is manufactured without the requirement for welding. Separately extruded fins are connected to both base plates by placing the fins side by side in channels in both base plates. In order to couple the base plates and the fins, the base plates are maintained at a constant relative distance and a swaging tool is passed adjacent the fins and between the base plates in a direction parallel to the surface of the base plates. The swaging tool asserts pressure to the base plates to thereby swage the base plates against the ends of the fins. Undesirable warping of the base plates during the process is reduced or prevented by providing a base plate configuration that minimises the bending moment between the swaged base plate material and the rest of the base plate.

Abstract: A cooling device (10) for heat dissipation for a heat-generating component includes a heat sink (14) and a heat pipe (13). The heat sink attached to the component includes a base (11) and a plurality of fins (12) extending from the base. A bottom portion of the heat pipe formed between the base and the fins, the remainder of the heat pipe formed through the fins. An apparatus for making the cooling device includes a mold (20) and a core (30) accommodated in the mold. The mold includes a base part (21) and a pair of symmetrical forming parts (22) slidably engaged on the base part. The forming parts defines a plurality of slots (222), a cavity (224), and a recess (225) respectively corresponding to the fins of the heat sink, the base of the heat sink, and the heat pipe.

Abstract: A manufacturing method for a cooling unit that includes a cooling plate in which a cooling fluid flows, the cooling plate having a cooling pipe through which the cooling fluid flows, and a pair of tabular members arranged to be opposed to each other across the cooling pipe, the manufacturing method for a cooling unit includes: forming a groove in which the cooling pipe is housed at least in one opposed surface of the pair of tabular members; combining the pair of tabular members while housing the cooling pipe in the groove; and filling a heat conduction material in a gap between the groove and the cooling pipe.

Abstract: A modular heat exchanger suitable for automotive applications, and methods for forming the modular heat exchanger. The modular heat exchanger construction incorporates a monolithic brazed core assembly composed of flat-type cooling tubes and sinusoidal centers. The required positional tolerances of the tubes for mating with the remainder of the heat exchanger are maintained within the brazed core assembly by minimizing core shrinkage resulting from the brazing operation during which the tubes are brazed to the centers.

Abstract: Distortion of the cross-sectional shape of a tube when producing a heat exchanger tube by cutting a continuous tube is prevented by forming cutting grooves in a strip material in advance by an upper and bottom cutter. The two side edges of the strip shaped member where stress will concentrate in the next tube forming step, the parts strongly bent, etc. are made thick, while the parts forming the belly surfaces of the tubes are made thin. At least four rollers are divided into two groups and arranged in a zigzag configuration. The continuous tube receives bending force in the forward and reverse directions between the group of rollers and is easily broken at the cutting grooves.

Abstract: A method for manufacturing a heat-dissipating structure of a rectifier combines heat pipes into the heat-dissipating structure of the rectifier to enhance the heat-dissipating efficiency thereof. A metal tube of a heat pipe is has an inlet. A wick structure is formed inside the metal tube. The inlet of the metal tube is sealed. The metal tube is disposed in a mold of a heat-dissipating shell. A melted metal is cast into the mold and forms a heat-dissipating shell. The heat-dissipating shell is taken out from the mold. The sealed inlet of the metal tube in the heat-dissipating shell is cut. The metal tube is filled with a working fluid. The inlet of the metal tube is sealed.

Abstract: This invention relates to a high density architecture for an integrated circuit package (10) in which a plurality of circuit communication wafers (12) are disposed in a stack with a plurality of cooling plates (14) between them, and wherein circuit communication between the communication wafers (12) is provided from wafer to wafer through the cooling plates (14). In addition, the communication wafers (12) may have integrated circuit chips (18) deposited on both sides of the wafer, and chip-to-chip communication may be provided from one surface of the wafer to another through the wafer. The resulting integrated circuit package may have any desired geometrical shape and will permit heat exchange, power and data exchange to occur in three generally mutually orthogonal directions through the package.

Abstract: A method of manufacturing a heat dissipating device, the method includes steps: a) affording a heat pipe, a solid solder bar and a heat sink, wherein the heat sink includes a base defining a groove at a side thereof; b) placing the solder bar and the heat pipe, in turn, into the groove of the heat sink; c) heating to melt the solder bar and simultaneously pressing the heat pipe to have an outer surface of the heat pipe coplanar with said side where the groove is defined; and d) cooling to achieve the heat dissipating device wherein the solder bar is evenly distributed between the heat pipe and the base.

Abstract: A method for removing heat from a heat generating component using a low profile extrusion with a plurality of micro tubes extended there through. The low profile extrusion is placed into thermal connection with heat producing components. A heat transfer fluid removes heat via an adiabatic process.

Abstract: A method of brazing an aluminum or aluminum alloy material, containing brazing an aluminum alloy brazing sheet that has an aluminum or aluminum alloy core material and, being clad on one or both surfaces, a filler alloy layer comprised of an Al—Si-based alloy and contains Mg incorporated at least in a constituent layer except the filler alloy layer, thereby to form a hollow structure whose one surface clad with the filler alloy is the inner surface, wherein the brazing is carried out in an inert gas atmosphere without applying any flux; and an aluminum alloy brazing sheet which satisfies the relationship: (X+Y)?a/60+0.5 and X>Y, wherein a (?m) represents the thickness of the filler alloy layer clad on the core material of the inner side of the hollow structure, and X and Y (mass %) represent the Mg contents of the core material and the brazing material, respectively.