Abstract: Heatsink structures for integrated circuit chips, chip packages, printed wiring boards and the like are disclosed. The heatsink structures according to the present invention have thin flexible cooling fins which move and vibrate under the flow of a cooling fluid. In one embodiment, the fins comprise a thin metal film, such as copper or aluminum, which is laminated to a thin polymeric layer. The polymeric layer provides resilience and elasticity to the metal film and the cooling fins.

Abstract: A heat transfer tube with a cross-grooved inner surface used in refrigerators, air conditioners or the like and a manufacturing method thereof are disclosed. The heat transfer tube is formed in such a manner that the helix angle .alpha. of a primary spiral groove to the longitudinal axis of the tube is in the range of 10.degree. to 40.degree., the intersecting angle .beta. of a secondary groove to the primary spiral groove is in the range of 75.degree. to 105.degree., the ratio H/Hf of a height H of the secondary groove to a height Hf of the primary spiral groove is in the range of 0.5 to 1.0, the slope angle .gamma..sub.1 of an upstream slant face is in the range of 90.degree. to 105.degree. to the direction of the primary spiral groove, the slope angle .gamma..sub.2 of a downstream slant face is in the range of 30.degree. to 60.degree.

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: A workpiece chuck includes an upper assembly on which can be mounted a flat workpiece such as a semiconductor wafer. A lower assembly is mountable to a base that supports the chuck. A non-constraining attachment means such as vacuum, springs or resilient washers applied to the chuck holds the upper assembly to the lower assembly, the lower assembly to the base and can hold the wafer to the top surface of the upper assembly. By holding the chuck together by non-constraining means, the chuck layers can move continuously relative to each other under expansion forces caused by temperature effects, such that mechanical stresses on the chuck and resulting deformation of the chuck and workpiece over temperature are substantially eliminated. A plurality of support members including inclined surfaces provided between an upper and lower portion of the chuck maintain the top surface of the chuck and any workpiece mounted thereon at a constant height over temperature.

Abstract: A spacer for heat exchangers comprising a plate for forming and maintaining a first passage and a second passage which carry out heat exchange therebetween; and the plate made of a material obtainable by mixing a fibrous material having a softening point and a resin material having a lower softening point than the fibrous material, followed by sheeting the mixture.

Abstract: In a plate heat exchanger the heat transfer plates (7, 8) are in pairs welded together to form cassettes (6). The two plates in every cassette bear on each other via corrugation ridges (25), which are crossing each other and create a flow path (33) between them for a first fluid. The cassettes (6) bear on each other via elevations (26), which are higher than the corrugation ridges (22) on the outsides of the cassettes. Between the cassettes (6) flow paths (34) are delimited for a second fluid. The main directions of flow for the two fluids are in parallel. Each one of the mentioned elevations (26) is elongated and extends with its longitudinal axis substantially in parallel with the main directions of flow for the fluids, bridging at most two valleys (23) between corrugation ridges (22) extending next to each other.

Abstract: Heat radiating fin plates in a curved shape are radially arranged on a heat radiating surface of a heat transfer plate, and a space is provided so as to be surrounded by inner edges of the heat radiating fin plates. The heat radiating fin plates have sidewalls formed with projections.

Abstract: A mechanism for holding a substrate on a substrate stage of a substrate treatment apparatus according to the present invention comprises an exhaust mechanism section connected to the substrate treatment apparatus having the substrate stage therein and used to discharge a gas from the substrate treatment apparatus by suction, and a holding mechanism section having one end portion formed with a plurality of intake holes opening in the upper surface of the substrate stage on which the substrate is placed and the other end portion connected to the exhaust mechanism section, whereby the sucking force of the exhaust mechanism section is caused to act on the intake holes so that the substrate is held on the substrate stage by suction.

Abstract: An aluminum heat exchanger includes laminated aluminum tubes and corrugated fins, a core portion receiving respective ends of tubes into sheet metals members, and iron or stainless steel inserts having high strength receiving U-shaped folded pieces of the sheet metal members contacting the corrugated fins at the outermost portion of the core portion. The tubes and the corrugated fins are held and pressed from both sides of the core portion by the inserts and the corrugated fins are protected from coming apart during a brazing operation.

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: A shell and tube heat exchanger for exchanging heat between a shell side fluid and a tube side fluid has a longitudinally extending shell, a longitudinally extending tube bundle and one or more baffles positioned within the shell for directing the shell side fluid to flow across the tube bundle. One or more valves is also provided within the shell of the heat exchanger. Each valve is operable between a first position and a second position and co-operates with a baffle for adjusting the flow of shell side fluid through the shell side of the exchanger. Each of the valves is controlled by an external actuator.

Abstract: A heat exchanger (10) assembly with a first header (12), a second header (14), a plurality of seamed or folded type heat exchanger tubes (18) extending between the two headers (12, 14), and a plurality of heat exchanger fins (16). Each of the plurality of fins (16) has between 0.01% and 0.9% magnesium to improve the braze between the header (12, 14) and tube joint and the tube seam to inner surface joint (140). Additionally, the headers (12, 14) have a cladded inner surface with between about 0% to about 12.6% silicon to improve the braze at the tube-to-header joint.

Abstract: In a cooling device for electrical or electronic components, in which rib-like cooling elements (3) made of good heat-conducting material are thereby connected to a base plate (2) carrying the components (1a, 1b, 1c) to be cooled that the web-like bases (3a) of the cooling elements (3) are fixed in slot-like longitudinal notches (4) of the base plate (2), the fixing is thereby improved that the groove-shaped indentation (4a) in the side wall (4c) of the longitudinal notch is shaped and dimensioned in free cross-section in such a way that the permanent molding of the side wall of the profile base (3a) takes place without essential bending deformation of the profile limbs of the cooling elements (3) rising from the longitudinal notch (4).

Abstract: Heat transfer tubes have an exterior surface in contact with a refrigerant and an interior surface defining a path through which a liquid is conveyed in an axial direction of the tube. The exterior surface of the tube has a plurality of fins formed thereon; the interior surface of the tube has a plurality of ridges formed thereon. The fins have an average width v with respect to the axial direction of the tube and a pitch Q with respect to the axial direction of the tube. A channel is provided between adjacent fins, the channels having a channel bottom of length L with respect to the axial direction of the tube. The ridges have a ridge height (e) and a ridge base width (b). The tubes have a ratio of L/v in a range of from 1.22 to 3.40. L is greater than 45% of fin pitch Q, and is preferably between 45% and 75% of fin pitch Q. A ratio of (e.times.L)/b is in a range of from 0.0062 to 0.0165; a ratio of e/b is in a range of from 0.565 to 0.973.

Abstract: A first cooling fin and a second cooing fin are separated to have a predetermine clearance, and a plurality of connecting portions for partly connecting the first and second cooling fins are formed. When the first and second cooling fins are unfolded, the length E of each the connecting portion in parallel with the longitudinal direction of the first and second cooling fins is equal to 5% or less of the length F between the adjacent connecting portions. Further, the first cooling fin is projected from the condenser tube toward the radiator tube side with a projection length Lc being in a range of 1.7 to 7.0 mm.

Abstract: In an inner surface-grooved heat transfer tube, a plurality of fins is formed on the inner surface thereof along a line forming a first predetermined angle with respect to the longitudinal axis of the tube, a plurality of notches is defined on the fins along a line forming a second predetermined angle with respect to the longitudinal axis, and the depth Hf' of the notches is specified to be 20% or more and below 40% (0.2.ltoreq.Hf'/Hf<0.4) with respect to the height Hf of the fins, to provide an inner surface-grooved heat transfer tube which can suppress pressure loss of a refrigerant, and by which improvements in performance of condensation and evaporation are intended. In addition no increase of power consumption is required for the pump.

Abstract: A plate heat exchanger comprises heat transfer plates (5) provided with port holes (2a). The plates are compression-molded relative to a reference plane and permanently joined to each other to a plate package to form heat transfer passages between adjacent heat transfer plates (5) and at least one port hole channel through the package. The plates (5), through the compression-molding, have contact portions (9) which through the permanent joining form areas of the plate package that lack any connection to the heat transfer passages. An aperture (3a) is made in each of the portions (9). Such apertures (3a) form at least one attachment member channel extending through the plate package and being adapted to receive an attachment member for attachment of the plate heat exchanger to a support member or a mounting plate.

Abstract: Precooked dishes loaded in a refrigerated enclosure (4) of a transport cart (1) for their transport toward a place of consumption, are selectively restored in temperature. The refrigerated cooked dishes which must be restored in temperature are, before being loaded in a single enclosure (4), disposed with the dishes not requiring restoration of temperature, on a same tray (6) common to all the dishes constituting an individual meal. Each tray is disposed directly on a heating plate inside the single enclosure (4) of said refrigerated transport cart, and the restoration of temperature of only the first-mentioned dish or dishes is effected by heat transfer through a thermally conductive region of the common tray (6) underlying only the first-mentioned dish or dishes.

Abstract: A plate type heat exchanger includes a plurality of laminated plates 11 each having a resin-covered gasket 15 mounted in a gasket groove 13 therein surrounding a heat transfer surface 12. The resin-covered gasket includes a core 15a of elastic material whose liquid-contacted side surface is covered with a corrosion-resistant resin cover 15b. In this plate type heat exchanger, the liquid-noncontacted side of the core 15a is integrally formed with a fixing element 16, while the outer peripheral surface of the plate 11 is formed with a recess 14 adapted to fit on the fixing element 16. Thus, the resin-covered gasket 15 can be mounted in the gasket groove 13 without using any adhesive agent.

Abstract: A plate type heat exchanger, which may for example be an evaporator for a motor vehicle air conditioning installation, comprises a stack of hollow plates with a pipe connector interposed in the stack. The flow circuit in which the heat exchanger is inserted includes a fluid flow tube coupled to the pipe connection of the heat exchanger by means of a coupling device which includes a clamping ring. This coupling device includes an intermediate sleeve having a cylindrical portion fitted intimately around a cylindrical end portion of the pipe connection, together with another cylindrical portion which serves in effect as an extension of the cylindrical end portion. The clamping ring is engaged around the outer cylindrical portion of the sleeve, so as to clamp the latter around the end of the fluid flow tube, the latter having previously been introduced into the sleeve and the end portion of the pipe connection.