Abstract: To provide a method of forming a fan with ring in one piece from a single metal plate and to provide the fan formed using the method, the metal plate is plastically worked into a shallow pan shape so as to form a cylindrical ring portion 1 on the periphery. A boss portion 2 is then formed at the center of the bottom portion of the pan shape, cutting all portions, except for part of the front end edge along the radius of each of blade portions 3 and part of the edge of the ring portion 1 for use as connection portions 4 so that the plurality of radial blade portions 3 are slit and formed.

Abstract: To provide a method of forming a fan with ring in one piece from a single metal plate and to provide the fan formed using the method, the metal plate is plastically worked into a shallow pan shape so as to form a cylindrical ring portion 1 on the periphery. A boss portion 2 is then formed at the center of the bottom portion of the pan shape, cutting all portions, except for part of the front end edge along the radius of each of blade portions 3 and part of the edge of the ring portion 1 for use as connection portions 4 so that the plurality of radial blade portions 3 are slit and formed.

Abstract: An aluminum-made heat exchanger including a flat tube is formed by, using an aluminum strip-shaped material coated with a brazing metal on the outer surface of a core metal and coated with a sacrificial anode material at the inner surface side thereof, bending the strip-shaped material in the width direction thereof, wherein many flat tubes are diposed parallel with each other and joined using a flux in a furnace. In order to provide the aluminum-made heat exchanger capable of being satisfactorily brazed and a high strength after brazing, the brazing metal is of an Al—Si alloy, core metal is an Al—Si alloy including Si of 0.4 to 1.2% by weight, and the sacrificial anode material is of an Al—Mg—Zn alloy including Mg of 0.3 to 0.75% by weight.

Abstract: The system is a self-oxidation internal heating steam reforming system for conducting self-oxidation of a raw material gas under the presence of oxygen and conducting steam reforming to generate a hydrogen-rich reformed gas. The system includes a steam generator including a combustion section for combusting an air-fuel mixture obtained by mixing a combustion air with a fuel, thereby heating water using a combustion gas generated in the combustion section to generate hydrogen; a first sucking-mixer for sucking the raw material gas into a steam stream coming from the steam generator to obtain a raw material-steam mixture; and a reformer for oxidizing the raw material gas in the raw material-steam mixture by an oxygen-containing gas supplied from outside, thereby conducting steam reforming of the raw material gas using the reaction heat of the oxidation to generate a hydrogen-rich reformed gas.

Abstract: A cylinder-type heat exchanger including cells spirally wound between an inner cylinder and an outer cylinder which are concentrically arranged. Each cell includes a first plate and a second plate which are in contact with each other. The first and second plates each have several inlets and outlets arranged in parallel at opposed ends in the axial direction, with communication portions being arranged between the inlets and between the outlets. A first flow passage through which a first fluid flows is formed on the confronting sides of the first plate and the second plate, while a second flow passage through which a second fluid flows is formed on the non-confronting sides of the first plate and the second plate.

Abstract: Heat exchanger core including flat plate parts formed by alternately folding back a single belt-like metal plate in a zigzag fashion at a first fold-back edge and at a second fold-back edge; element parts formed by joining peripheral edges of a pair of adjoining flat plate parts which are integrally coupled to each other at the first fold-back edge and adjoining element parts are integrally coupled at a certain interval to each other at the second fold-back edge; and a pair of ports for a first fluid formed at positions apart from each other at the peripheral edge of each element part. A second fluid flows along the outer surface side of each element part.

Abstract: An exhaust heat exchanger with catalyst to be used in an exhaust system of an internal combustion engine is provided. A catalyst chamber is disposed within a water chamber which a cooling water flows through. An exhaust gas having passed through the catalyst chamber in contact with a catalyst makes an indirect heat exchange with the cooling water before it is discharged outside. The water chamber is formed surrounded by an inner trunk and an outer trunk, and the catalyst chamber is formed by a cylindrical body disposed coaxially with the inner and outer trunks and housing the catalyst. A spiral passage for the exhaust gas is formed between the inner trunk and the cylindrical body. A plurality of heat transmitting pipes are arranged within the water chamber surrounding the inner trunk circumferentially at regular intervals. The exhaust gas having passed through the catalyst flows within the spiral passage and the heat transmitting pipes in turn to make a heat exchange with the cooling water.

Abstract: A pressure valve including a valve seat 3 is mounted on a cap body 8 side. The cap body 8 and a filler neck 6 are fastened together in an anti-disengagement manner by use of locking means.

Abstract: A short cylindrical connection cup is fitted and brazed to a pipe fitting port of a metallic tank. Afterward, the extremity of a resin pipe is inserted via an O-ring into the connection cup, and a caulking claw of the connection cup is caulked to press a flanged portion of the resin pipe.

Abstract: A tank body 3 is formed in the shape of an elongated groove having an intermediate first slit 5 disposed at its middle portion in the longitudinal direction and having a pair of end first slits 5a disposed at its opposite ends. A reinforcement member 9 is fitted in the first slit 5 at the middle portion, and a pair of reinforcement side lids 11 are fitted correspondingly in the pair of end first slits 5a at opposite ends. The reinforcement member 9 and the reinforcement side lids 11 are formed with intermediate second slits 8 and end second slits 8a, respectively, which in cooperation serve to clamp the sidewalls 2 of the tank body 3. The opening of the tank body 3 is fitted to the groove-shaped tube plate 4 such that their connections are joined together by brazing or other joining means.

Abstract: A cylinder-type heat exchanger comprises one or more cells 3 spirally wound between an inner cylinder 1 and an outer cylinder 2 which are concentrically arranged. Each cell 3 includes a first plate 4 and a second plate 5 in pairs which are in contact with each other. The first and second plates each have a multiplicity of inlets 6 and outlets 7 arranged in parallel at opposed ends in the axial direction, with communication portions 9 being disposed between the inlets 6 and between the outlets 7. A first flow passage 10 for communication of a first fluid 10a is formed on the confronting sides of the first plate 4 and the second plate 5, whilst a second flow passage 11 for communication of a second fluid 11a is formed on the non-confronting sides thereof.

Abstract: A cap body of a synthetic resin includes a cylindrical portion having an external thread formed on its outer peripheral surface, the cylindrical portion having at its lower end a shoulder or an annular groove for receiving an O-ring. The cylindrical portion has on its inner peripheral surface an annular, internally flanged valve stopper which provides a support for a locking rib of a pressure valve. The pressure valve includes deformation slits formed along the outer periphery of a pot-shaped valve body, and a seal plate disposed on the bottom surface of the valve body.

Abstract: A header pipe 3 is prepared by severing an elongated round pipe to a desired length, forming an engagement recess 1 in the inner surfaces at opposite open ends, and forming a multiplicity of flat holes 2 in the peripheral surfaces. A flat tube 4 is inserted into each of the flat holes 2, with fins 5 fixedly secured to the outer surfaces thereof to thereby construct a core 6. End members such as the end portion of a port pipe 7 and an end cover 8 are fitted to the openings of the header pipe 3 by way of an O-ring 9 for sealing, to complete a module-type heat exchanger.

Abstract: A tank body 3 is formed in the shape of an elongated groove having an intermediate first slit 5 disposed at its middle portion in the longitudinal direction and having a pair of end first slits 5a disposed at its opposite ends. A reinforcement member 9 is fitted in the first slit 5 at the middle portion, and a pair of reinforcement side lids 11 are fitted correspondingly in the pair of end first slits 5a at opposite ends. The reinforcement member 9 and the reinforcement side lids 11 are formed with intermediate second slits 8 and end second slits 8a, respectively, which in cooperation serve to clamp the sidewalls 2 of the tank body 3. The opening of the tank body 3 is fitted to the groove-shaped tube plate 4 such that their connections are joined together by brazing or other joining means.

Abstract: Disclosed is a heat exchanger core comprising a multiplicity of flat plate parts (3) formed by alternately folding back a single belt-like metal plate in zigzag at a first fold-back edge (1) and at a second fold-back edge (2); a plurality of element parts formed by joining peripheral edges (4) of a pair of adjoining flat plate parts (3) which are integrally coupled to each other at the first fold-back edge (1), adjoining element parts (5) being integrally coupled at a certain interval to each other at the second fold-back edge (2); and a pair of ports (6) and (7) for a first fluid formed at positions apart from each other at the peripheral edge of each element part (5), wherein a second fluid flows along the outer surface side of each element part (5).

Abstract: A header pipe 3 is prepared by severing an elongated round pipe to a desired length, forming an engagement recess 1 in the inner surfaces at opposite open ends, and forming a multiplicity of flat holes 2 in the peripheral surfaces. A flat tube 4 is inserted into each of the flat holes 2, with fins 5 fixedly secured to the outer surfaces thereof to thereby construct a core 6. End members such as the end portion of a port pipe 7 and an end cover 8 are fitted to the openings of the header pipe 3 by way of an O-ring 9 for sealing, to complete a module-type heat exchanger.

Abstract: A cap body 3 of a synthetic resin includes a cylindrical portion 7 having an external thread 10 formed on its outer peripheral surface, the cylindrical portion 7 having at its lower end a shoulder 11 or an annular groove 12 for receiving an O-ring. The cylindrical portion has on its inner peripheral surface an annular, internally flanged valve stopper 13 which provides a support for a locking rib 17 of a pressure valve 6. The pressure valve 6 consists of deformation slits 16 formed along the outer periphery of a pot-shaped valve body 14, and a seal plate 15 disposed on the bottom surface of the valve body 14.

Abstract: The present invention provides fins utilized in an integrated heat exchanger that achieve a highly effective prevention of heat conduction, do not create any cuttings during their formation and achieve a high degree of dynamic strength and a method for manufacturing these fins.

Abstract: A heat exchanger is provided with a casing (5) in which a heat exchanger core (3) is received. The core (3) is provided with a pair of inlet/outlet convex portions (1) in its opposite end portions. These pipes (1) pass through the casing (5) to project outward.

Abstract: In a “stacked” type heat exchanger having a stack of elements through the interior of which a first fluid flows and having a core support arranged at the end of the stack in the stacked direction, the core support includes slits that extend from its edges up to the central portion, the slits capable of slightly deforming when subjected to a thermal stress. It is thus possible to reduce the thermal stress which may be applied to both the core support and the elements when there arises a difference of thermal expansion therebetween.