Abstract: An accumulator includes a tank, a refrigerant inlet port provided at an upper portion of the tank, a refrigerant outlet port provided at the upper portion of the tank, a dryer unit disposed in the tank at an intermediate portion along a direction of height of the tank, and a separating wall extending upwardly from the dryer unit and dividing an upper inner space of the tank above the dryer unit into an inlet side upper space located at the refrigerant inlet part side and an outlet side upper space located at the refrigerant outlet side port. The separating wall has a plurality of apertures formed in a scattered state for communicating the inlet side upper space and the outlet side upper space each other. The accumulator includes an oil returning tube having a lower inlet opening and an upper outlet opening. The oil returning tube is disposed in the tank such that the lower inlet opening and the upper outlet opening are located at a bottom portion of the tank and at the refrigerant outlet port, respectively.

Abstract: A first aluminum brazing alloy for cold brazing, comprises 70 to 90% by weight of zinc and 0.05 to 5% by weight of titanium with the balance consisting of aluminum and impurities. A second aluminum brazing alloy for cold brazing, comprises 30 to 70% by weight of zinc, 1 to 7% by weight of silicon, and 0.05 to 5% by weight of titanium with the balance consisting of aluminum and impurities. Brazing alloys having these compositions have a low melting point and can well wet a base metal. Further, use of the above aluminum brazing alloy for cold brazing enables a low-melting aluminum material to be well brazed at 400 to 550° C.

Abstract: An oil cooler 11 comprises oil channel members 2A arranged one above another in parallel at a spacing and each composed of a pair of plates 20A, each of the plates 20A having a hole 21 at each of opposite ends thereof and a channel portion 22 between the end holes 21, the pair of plates 20A being joined with recessed surfaces of their channel portions 22 opposed to each other to form the oil channel member 2A; and annular header members 4A each interposed between each pair of adjacent oil channel members 2A at each of opposite lateral ends of the cooler.

Abstract: A heat sink for use in a portable electronic device for disposing of the heat generated by an electronic component of the device, the heat sink comprising in its entirety a metal clad plate composed of two metal sheets and having a nonbonded portion in a required pattern, the nonbonded portion providing a heat pipe portion formed by outwardly inflating at least one of the two metal sheets of the nonbonded portion to make a hollow portion and enclosing a working liquid in the hollow portion, the metal clad plate having on one surface thereof a mount portion for the electronic component at a region thereof where the heat pipe portion is partly present, the heat pipe portion having a heat receiving portion at the region thereof where the mount portion is present. When a heat-generating electronic component is attached to the mount portion, the working liquid in the heat receiving portion is heated with the heat produced by the component to evaporate.

Abstract: An evaporator comprises front and rear header portions, and U-shaped flat tubular portions arranged in parallel and each connected at opposite ends thereof to the header portions. Each of the header portions is provided with a partition for blocking a refrigerant flowing inside thereof and directing the refrigerant toward some of the flat tubular portions to thereby form a refrigerant channel comprising a plurality of paths each turned by the partition. The rear header portion of the final path is provided with a refrigerant dividing wall having refrigerant apertures for passing therethrough a portion of the refrigerant flowing in from the path immediately upstream from the final path, with the remaining portion of the refrigerant blocked by the wall and directed toward some of the flat tubular portions.

Abstract: A process for producing a vibration isolator. The process involves steps of forming an intermediate product including an axial member, an outside member having a cylinder-shaped portion and a rubber elastic member, and drawing the cylinder-shaped portion with a drawing apparatus provided with a drawing hole at least by pressing the cylinder-shaped portion into the drawing hole. The drawing hole has a predetermined dimensional diameter being smaller than an outer peripheral diameter of the cylinder-shaped portion. Thus, the cylinder-shaped portion is reduced diametrically to plastically deform. The production process can obviate the conventional pressed-in construction in which metallic members contact with each other, can make the manufacture of the vibration isolator easy, and can reduce the manufacturing cost.

Abstract: A magnetic hard disc substrate made of an aluminum alloy for memory devices such as a computer must correspond to an improved structure in which the interval between a head and a medium is made narrower to attain high density recording. In order to prevent head crash, it is required that the magnetic hard disc substrate have a smooth surface and decreased defects. The present invention provides a process for manufacturing a magnetic hard disc substrate made of an aluminum alloy which satisfies the above requirements and also provides a disc substrate which has a surface roughness Ra.ltoreq.0.5 nm and is free from abrasive flaws with a depth of 5 nm or more and from micro-waviness or provides a disc substrate which has a surface roughness Ra.ltoreq.5 angstroms and a surface roughness Rmax.ltoreq.80 angstroms and in which the number of scratches with a depth of 50 angstroms or more is 5 or less and the number of pits with a depth of 50 angstroms or less is 5 or less in the surface.

Abstract: A tank of an accumulator is divided into an upper room and lower room by a dryer unit. The upper room is divided into a right upper divided room located at a refrigerant inlet side and a left upper divided room located at a refrigerant outlet side by a separating wall formed with the dryer unit. The right and left upper divided rooms communicate with each other through a plurality of apertures that are provided in the separating wall. Further, an oil returning tube is integrally formed with the dryer unit, and a filter is provided in the dryer unit.

Abstract: A heat sink device for use in an electronic device for dissipating into the atmosphere outside a housing of the electronic device the heat generated by an electronic component disposed within the housing. The housing has a peripheral wall formed with a heat removal opening. A heat sink disposed within the housing comprises a metal body having a heat pipe portion, and a radiation fin attached to the body in the vicinity of the heat removal opening and opposed to the opening. The heat-generating electronic component, such as CPU, is held in contact with the metal body at a location away from the fin attached portion thereof.

Abstract: A brazing material that has a low melting point and can braze aluminum materials at a low temperature with a good wetting property is disclosed. The brazing material can include a matrix composed of Zn, a Zn--Al alloy or a Al--Zn--Si alloy having a low melting point each preferably containing 0.001 to 3.0 wt % of rare-earth element. When such a brazing material is used, aluminum materials can be brazed at a temperature of 580.degree. C. or below.

Abstract: A process for producing a vibration isolator includes the steps of preparing an axial member, an outside member, the outside member including a cylinder-shaped portion and a bracket having a hollow, and a cylinder-shaped rubber elastic member, and drawing the cylinder-shaped portion by inserting a stationary mold, with which a drawing apparatus is provided, into the hollow of the outside member so that an outer peripheral surface of the cylinder-shaped portion contacts with the stationary mold, by disposing the rubber elastic member and the axial member inside the cylinder-shaped portion, and by pressing the cylinder-shaped portion onto the stationary mold and simultaneously diametrically reducing the cylinder-shaped portion to plastically deform the same. The production process can obviate the conventional pressed-in construction in which metallic members contact with each other, can make the manufacture of the vibration isolator easy, and can reduce the manufacturing cost.

Abstract: A stack type evaporator has a compact structure and a high cooling ability. A plurality of flat and plate-like tubular elements 1, each having a pair of formed plates 7, are stacked together in the lateral direction. Each tubular element 1 has two or more passages 10 inside it, each extending along the longitudinal direction. A refrigerant flows through a forward passage 10 in the tubular elements 1, and shifts to a return passage 10 in the direction opposed to the air flow. A corrugate inner fin 11 is placed throughout the refrigerant passages 10. One of the formed plate pair 7 has short cylindrical tanks 12a projecting outward, while the other has short cylindrical tanks 12b projecting outward, but in the opposite direction. When stacking up the tubular elements 1, the tanks 12a are fit into the corresponding tanks 12b of the adjacent formed plate 7 of the next tubular element 1.

Abstract: A rotating probe 12 is disposed adjacent to a supporting roller 20. Metallic joining members 1, 2, which are butted or stacked to have a joining portion 3, are disposed between the supporting roller 20 and the probe 12 with one surface of the joining members 1, 2 supported by a circumferential peripheral surface of the supporting roller 12, and the rotating probe 12 is inserted into the joining portion 3 of the joining members 12. Then, the joining members 1, 2 are advanced along the joining portion 3 so that a portion of the joining members 1, 2 where the probe 12 contacts is softened by the friction heat generated due to the rotation of the probe 12 and agitated by the probe 12 to thereby join the joining materials 1, 2.

Abstract: A flux composition for brazing of an aluminum material which can feed a proper amount of flux to an area to be joined at the time of brazing and at the same time can improve working environment, and a method for brazing of an aluminum material. The method comprises: coating an aluminum material to be joined with a flux composition comprising 0.5 to 25 parts by weight of a polymeric compound having a number average molecular weight of 50000 to 5000000 and comprising repeating alkylene oxide units, 5 to 30 parts by weight of a fluoride flux, and water added in such an amount as will provide a total amount of the composition of 100 parts by weight; heating the coated area to remove water; heating the coated area to decompose and remove the polymeric compound; and then conducting heating for brazing.

Abstract: An aluminum electrode foil for an electrolytic capacitor has a sponge-like etching layer formed on at least one of the surfaces thereof, and the sponge-like etching layer is reduced in a direction of thickness. The aluminum density of the reduced sponge-like etching layer `d2` is set from 0.8 to 2.2 g/cm.sup.3.

Abstract: A duplex heat exchanger comprises unit heat exchangers which have a plurality of tubes arranged parallel with each other and comprise fins each interposed between two adjacent ones of such tubes, opposite ends of each tube being connected to a pair of headers in fluid connection therewith. The unit heat exchangers are closely juxtaposed to each other fore and aft in a direction of air flow. Coolant circuits of said unit heat exchangers are connected either in series or in parallel with each other.

Abstract: The mounting component for a cylindrical bushing is comprised of a mounting portion for a bushing into which a cylindrical bushing can be fitted. The mounting portion for a bushing is a clamping-type mounting portion, comprised of a receptacle and a cover that is separate from the receptacle, and the aforementioned cylindrical bushing is inserted and clamped between them. The aforementioned receptacle is comprised of a hollow holder with an arcuate cross section that holds the aforementioned cylindrical bushing. On the holder, two protruding joints are provided. The aforementioned cover is comprised of a hollow holder with an arcuate cross section that holds the aforementioned cylindrical bushing. On the holder, joints corresponding to the joints of the aforementioned receptacle are provided.

Abstract: In a heat exchanger according to the present invention, a projecting edge portion integrally projects outward from an opening edge portion of a tank body, and a tank and a core plate are connected to each other in such a way that a claw portion of an edge portion of the core plate is caulked by being folded toward a back of the projecting edge portion, and the back of the projecting edge portion at the opening edge portion of the tank body and an outside surface of the tank body are continuously connected to each other by a curved surface. Accordingly, stress dispersedly acts on the connection portion between the tank and the core plate so that local stress concentration is prevented and breakage is prevented.

Abstract: An entry board for drilling small holes having a front surface layer made of aluminum or aluminum alloy to be disposed at the drilling inlet side and a back surface layer made of aluminum or aluminum alloy to be disposed at the drilling outlet side. The back surface layer is adhered or joined by clad rolling to said front surface layer. The hardness of the front surface layer is smaller than that of the back surface layer.

Abstract: A multi-bored flat tube has outermost unit passages located at both ends of the tube and intermediate unit passages between the outermost unit passages. The outermost unit passage has a circular-based inner surface in cross-section, such as a circumferentially smooth curved shape in cross-section like a perfect circular shape or elliptical shape, or has a circular-based inner surface in cross-section having a plurality of inner fins extending in a longitudinal direction of the tube. The intermediate unit passage has a non-circular based cross-sectional shape, such as rectangular, triangular, trapezoidal, or circular based shape including a plurality of inner fins. The tube is strong against being hit by a stone and has a high heat exchanging performance.