Sumitomo Precision Products Co., Ltd.

Sumitomo Light Metal Industries, Ltd.

Sumitomo Metal Industries, Inc.

Tetsuo Abiko

Keizo Nanba

Shosuke Iwasaki

Michiki Hagiwara

Yoshihiko Sugiyama

Takashi Eta

Jyunichi Tujii

Chihiro Hayashi

Yoshio Baba

Masayasu Kojima

Teruo Uno

Keiji Miki

Kantaro Sasaki

Hiroshi Irie

Teruo Kurachi

Takeshi Aoki

A plate fin type heat exchanger is provided for achieving an increased heat exchanging efficiency and increased durability under violent variation in heat load. Fins for forming a channel for high-temperature fluid are secured to one of a pair of tube plates that form a channel for low-temperature fluid.

Plate fin heat exchanger for a high temperature

A plate fin type heat exchanger capable of developing a performance required for a plate regeneration of a micro gas turbine power generating device, i.e., achieving an increased heat exchanging efficiency and increased durability under violent variation in heat load and formed to have an excellent mass-productivity, wherein all fins are formed inde-pendently of each other for each low-temperature side path without brazing the entire fin inside a high-temperature side path, though all fini in the high temperature side path are non-nally brazed to the low-temperature side path, so as to relieve a thermal stres-s due to nonuniform temperature distribution inside and over the entire surface of a fluid path caused when high-temperature combustion gas flows therein, and the fins in the high-temperature side path are reduced in size and fixed to the low-temperature path side, a small spacer bar is disposed at a portion where the fins are;not provided for the manufacture of core assembling elements, and the elements are laminated, for example, by seal welding the spacer bars to each other so as to extremely facilitate the assembly.

Plate fin type heat exchanger for high temperature

A heat sink fin assembly of the corrugated type for cooling an LSI package comprises a flat base plate and a heat dissipating member made of a thin metal sheet having convex and concave portions which are comprised of a repeated series of side wall portions, top portions, and bottom portions. The base plate and the heat dissipating member are integrated with each other by bonding.

Heat sink fin assembly for cooling an LSI package

Aluminum brazing alloys for assembling aluminum heat exchangers by brazing which consist essentially of 4.5 to 13.5% of Si, from 0.005% to less than 0.1% of Sr and the balance essentially Al and, further, optionally may contain at least one element selected from the group consisting of 0.3 to 3.0% of Mg, 2.3 t0 4.7% of Cu and 9.3 to 10.7% of Zn. The aluminum brazing alloys provide high strength brazed joints with highly refined microstructure and brazing operation can be performed in a good condition without causing any detrimental cavity. Such excellent properties make the brazing alloys especially suited for the fabrication of superhigh pressure heat exchangers.

Aluminum brazing material for use in aluminum heat exchanger

Aluminum brazing alloys for assembling aluminum heat exchangers by brazing which consist essentially of 4.5 to 13.5% of Si, 0.05 to 0.5% of Ca and the balance essentially Al and, additionally may contain Mg in the range of 0.3 to 3.0% or at least Cu component of 2.3 to 4.7% of Cu and 9.3 to 10.7% of Zn. The aluminum brazing alloys have an excellent brazability and provide high strength brazed joints with highly refined microstructure. Such superior properties make the brazing alloys especially suited for the fabrication of superhigh pressure heat exchangers.

Fin stock materials adapted for use in superhigh pressure service heat exchanger fabricated by brazing are made of aluminum alloys consisting essentially of, in weight percentages, 0.6 to 1.5% of Mn, 0.1 to 1.0% of Cu, 0.1 to 0.75% of Mg, and 0.05 to less than 0.30% of Si, and the balance being aluminum and incidental impurities, the Fe in said impurities being controlled up to 0.8%. The aluminum alloy fin stock materials contain optionally at least one component selected from the group consisting of 0.05 to 0.25% of Zr, 0.01 to 0.25% of Ti, 0.05 to 0.25% of Cr and 0.01 to 0.25% of V. The fin stock materials have a combination of advantageous properties, particularly a high prevention effect of excessive silicon diffusion of brazing materials into the fins, good strength and formability, whereby give good utility particularly in plate fin heat exchangers for use in superhigh pressure applications.

Fin stock material for use in plate fin heat exchanger adapted for

A brazing material is disclosed, particularly suitable for the brazing of fins onto a heat exchanger exposed to high internal pressure, comprised of an Al-Si based alloy wherein the Fe content is limited to not more than 0.15 wt %. The brazing material is suitable for use in the brazing of Mg-containing materials.

Aluminum brazing alloy

A brazing method is disclosed which provides superior strength in the brazed joint formed. The brazed structure is subjected to a heat treatment after brazing, which improves the strength of the joint even if Magnesium compounds are employed.

Method of producing aluminum alloy structures

A plate fin heat exchanger adapted to applications using superhigh-pressure fluids was fabricated by brazing, the heat exchanger using as fin stock an alloy consisting essentially of 0.3 to 1.0 wt. % Si, 0.05 to 0.25 wt. % Cu, 0.6 to 1.5 wt. % Mn and 0.45 to 0.9 wt. % Mg, the balance being aluminum and impurities, wherein said impurities contain up to 0.8 wt. % Fe. At least one component selected from the group consisting of 0.05 to 0.25 wt. % Cr, 0.01 to 0.25 wt. % Ti, 0.03 to 0.25 wt. % Zr and 0.01 to 0.25 wt. % V may be added to the above fin alloy stock. By using the above plate fin, excessive silicon diffusion from a brazing alloy into the fin, which may cause reduction of width of the brazed joint, is suppressed, and as a result, lowering of the bonding strength of the brazed joint is eliminated.

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Osaka, Japan

Tetsuo Abiko