Abstract: To prevent a crack in a joint part of flattened tubes and a header, and smoothly distribute a fluid into the flattened tubes. In the joint part to the header, a reinforcement member having a curved reinforcement portion of U-shape is integrally brazed and fixed to outer peripheries of curved surfaces of the flattened tubes.

Abstract: In a heat exchanger in which a number of V-shaped convex portions are arranged in parallel at a surface of a fin, one of a pair of inclined convex portions forming a V-shape is arranged to be inclined to a plus side by an angle a relative to a circulation direction of a gas at a first plane of a fin, the other is arranged to be inclined to a minus side by an angle b, and both of them are arranged by asymmetric angles in a left and right direction, and at a second plane opposed to the first plane, the angles which are asymmetric in the left and right direction are made to be reverse to those of the first plane relative to the circulation direction of the gas.

Abstract: A double-tube heat exchanger that is easy to produce, the entire part of which is smoothly bent so that the heat exchanger works as a part of piping, and that has high pressure resistance. In the cross-section perpendicular to the axis of an inner tube (1), there are bag-like or ballon-like bulged sections (7a) directing radially from the center, and openings of the bulged sections (7a) are closed and the head of each bulged section (7a) is in contact with the inner surface of an outer tube (2).

Abstract: In a heat exchanger used for an EGR cooler or the like, in order to provide a heat exchanger that has a small number of parts, is assembled easily, can flow cooling water evenly at each part, and does not cause partial boiling, a strip-shaped metal plate is turned up and bent in a fanfold manner, flat first flow channels 3 and second flow channels 4 are formed alternately, both the ends of the first flow channels 3 are closed with slit blocks 6, projecting stripes 3a are bent and formed at the positions of ports 11 for the cooling water 10 in proximity to the slit blocks 6, and gaps 3c are formed between respective paired projecting stripes 3a.

Abstract: In a heat exchanger in which the number of parts is small, assembling is easy, bonded portions between each part are fewer and reliability of brazing is improved, a core body is constituted by turning up and bending a strip-shaped metal plate in a fanfold manner, and first flow passages and second flow passages are formed alternately in the thickness direction. Both ends of each of the first flow passages are blocked by each comb tooth of a pair of comb-state members, and a fin is set within the second flow passages so as to constitute a core. And a cylindrical casing is fitted with the outer periphery of the core body, and the casing is constituted by a channel-state material covering three faces of the outer periphery of the core body and a lid material blocking an opening of the channel-state material.

Abstract: In a heat exchanger having a casing in which a joint of the casing and between a core and the casing are brazed and fixed without a gap, the section of a portion in contact with the casing body is formed at a right angle at both ends of an upper edge portion of a header plate, and an upper lid is fitted so that it is brought into contact with the upper edge of the header plate over the entire length.

Abstract: A connection structure is provided for connecting heat exchangers (11, 12) to each other for exchanging heat between a first fluid flowing in body parts (13, 14) and a second fluid flowing in heat transfer pipes (15, 16) disposed in the body parts (13, 14). The connection structure includes connection holes (17, 18) provided in the body parts (13, 14) of the heat exchangers (11, 12) and a press-formable connection member (19), connected to the outer surfaces of the body parts (13, 14) for fluidly coupling the connecting holes (17, 18) so that the body parts (13, 14) are allowed to communicate with each other.

Abstract: In a heat exchanger in which the number of parts is small, assembling is easy, bonded portions of each part are fewer and reliability of brazing is improved, a core body is constituted by turning up and bending a strip-shaped metal plate in a fanfold manner, and first flow passages and second flow passages are formed alternately in the thickness direction. Both ends of each of the first flow passages are blocked by each come tooth of a pair of comb-state members, and a fin is set within the second flow passages so as to constitute a core. And in the heat exchanger in which a cylindrical casing is fitted with the outer periphery of the core body, the comb-state member has its tooth base crossing perpendicularly with each of the comb tooth and a root of each comb tooth bent in the L-shape along the tooth base, the plane of the tooth base is brought into contact with a turned-up end edge, and each connection portion between the comb-state member and the core body is integrally brazed/fixed.

Abstract: This invention is structured by: forming a core body by turning-up a strip-shaped metal plate in fanfold manner to create a large number of flat flow passages; blocking the individual flow passages at both ends thereof using the respective comb teeth of a pair of comb-state members; and fitting the casing to the core body, while providing inlet/outlet port of the fluid at a side face of the casing. The object of the invention is to establish uniform communication of the fluid in individual flat flow passages.

Abstract: In a heat exchanger in which the number of parts is small, assembling is easy, bonded portions between each part are fewer and reliability of brazing is improved, a core body is constituted by turning up and bending a strip-shaped metal plate in a fanfold manner, and first flow passages and second flow passages are formed alternately in the thickness direction. Both ends of each of the first flow passages are blocked by each comb tooth of a pair of comb-state members, and a fin is set within the second flow passages so as to constitute a core. And a cylindrical casing is fitted with the outer periphery of the core body, and the casing is constituted by a channel-state material covering three faces of the outer periphery of the core body and a lid material blocking an opening of the channel-state material.

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: The invention relates to integrating a first multimedia work and a second multimedia work to produce a combined multimedia work. The first and/or second multimedia works are converted into a common format such as SWF format, and the first multimedia work is converted to a sub-movie. The converted first multimedia work is inserted into the second multimedia work as a sub-movie of the second multimedia work to produce a combined multimedia work. Instructions in the combined multimedia work are updated in order to maintain the function of those instructions following the combination of the two works.

Abstract: A double-pipe heat exchanger that is easy to manufacture, and the whole thereof is smoothly bent to serve as part of the piping, and that provides high pressure resistance, wherein an inner tube has a section orthogonal to an axis line thereof in which a plurality of swollen portions in a bladder-like or balloon-like shape in section are formed in a radial direction from the center, mouths of these swollen portions are closed, and the tip ends of respective swollen portions are in contact with the inner surface of an outer tube.

Abstract: A double pipe heat exchanger that can be produced easily and can be used as a part of piping by bending the whole body, wherein an inner pipe is configured so that: a plurality of balloon-shaped bulges communicating with one another and extending from the center toward the radial directions in a cross section orthogonal to the axis line thereof may be formed; the outer circumference of the bulges may be bent into the shape of waves in an axial cross section; and the top portions of the waves may touch the inner surface of an outer pipe. Then in the state, the whole body including the inner pipe and the outer pipe is bent by applying external force.

Abstract: In a heat exchanger in which the number of parts is small, assembling is easy, bonded portions of each part are fewer and reliability of brazing is improved, a core body is constituted by turning up and bending a strip-shaped metal plate in a fanfold manner, and first flow passages and second flow passages are formed alternately in the thickness direction. Both ends of each of the first flow passages are blocked by each come tooth of a pair of comb-state members, and a fin is set within the second flow passages so as to constitute a core. And in the heat exchanger in which a cylindrical casing is fitted with the outer periphery of the core body, the comb-state member has its tooth base crossing perpendicularly with each of the comb tooth and a root of each comb tooth bent in the L-shape along the tooth base, the plane of the tooth base is brought into contact with a turned-up end edge, and each connection portion between the comb-state member and the core body is integrally brazed/fixed.

Abstract: This invention is structured by: forming a core body by turning-up a strip-shaped metal plate in fanfold manner to create a large number of flat flow passages; blocking the individual flow passages at both ends thereof using the respective comb teeth of a pair of comb-state members; and fitting the casing to the core body, while providing inlet/outlet port of the fluid at a side face of the casing. The object of the invention is to establish uniform communication of the fluid in individual flat flow passages.

Abstract: A bypass duct portion is integrally provided in a casing of an EGR cooler so that heat distortion generated at a part of the casing when bypassing of an exhaust gas is rationally absorbed, and the EGR cooler body and a valve case are brazed/fixed all together so as to improve strength of the valve case, whereby, the bypass duct portion is formed between an inner surface of the casing and the core, a switch is provided for switching and guiding the exhaust gas to either of the core or the bypass duct portion, and a large number of outer ribs formed in the circumferential direction respectively are arranged side by side while being separated from each other in the longitudinal direction in the bypass duct portion of the casing so as to constitute a heat stress absorbing portion.

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: An aluminum flat tube for a heat exchanger is fabricated from an aluminum strip-shaped material which is structured by a core material coated with a sacrificial anode material on the inner face thereof and coated with a brazing filler metal on the outer face thereof by bending in the width direction to form a nearly B-shaped flat cross section. To improve the corrosion resistance of the inner face of the tube, the both edge parts of the strip-shaped material in the width direction thereof are bent inward into the tube so as the front end edge of the edge part to become apart from the flat inner face of the tube.

Abstract: The present invention provides an EGR cooler that is easy to manufacture and can accelerate heat exchange. Round in section tubes are plastically deformed in one plane crossing centerlines thereof such that corrugated exhaust gas flow paths are formed inside the tubes.