Abstract: An evaporator stack, in particular for a double evaporator, includes foils for converting a liquid medium into a gaseous medium. The foil stack has at least one foil through which a medium flows and at least one additional foil. The foil stack has an inlet region for the liquid medium and a discharge region for the gaseous medium. The discharge region is designed such that a pressure gradient in the medium over the at least approximately entire width of the discharge region is smaller than a pressure gradient in the medium over the at least approximately entire length of the media foil through which flow occurs.

Abstract: The invention relates to a device for assembling at least one item of equipment, such as a secondary heat exchanger, onto a primary heat exchanger, the said primary heat exchanger including a tube manifold (8) and a manifold chamber (9) crimped onto the tube manifold, the periphery of the said tube manifold forming a groove (12) for accommodating a sealing gasket (13) between the tube manifold and the manifold chamber. This device comprises, on the one hand, first means (19, 21, 23) for clipping onto the outside of the said groove, and, on the other hand, means (20) for accommodating and locking the said item of equipment. Application to motor vehicles.

Abstract: A counterflow evaporator for refrigerants, in particular for zeotropic refrigerants, where elongated inner members are inserted in the elongated tubular members of the evaporator to form an annular passage through which the refrigerant can flow. Resilient support members maintain the elongated inner members in position within the elongated tubular members.

Abstract: An assembly of two heat exchangers is readily formed or disassembled using spring clips to hold the two heat exchangers in assembled relation. The arrangement is such that the spring clips do not exert undesirable tension or compressional forces against either of the cores of the heat exchangers, but rather, exert only torsional forces at the points of connection.

Abstract: The present invention is an indirect evaporative cooling module preferably made from extruded, twin-walled, corrugated, fluted plastic sheeting. Sheets of this corrugated material are cut into plates which are preferably laminated together to form the primary and secondary passages that comprise the heat exchanger core. These passages can be configured any number of ways, from vertical to horizontal to diagonal, and flow through these passages can be cross-flow, counter-flow and even baffle-flow. Increased heat exchange efficiency is achieved through a variety of ways, for example, by including an efficient water distribution means at the top of the heat exchanger, evaporative mesh extending through and below the heat exchanger for water distribution and pre-cooling, the creation of top and bottom heat exchange chambers by channeling water directly to the bottom zone of the heat exchanges passages, and roughening the surface of the sheets to increase heat transfer and to increase surface area.

Abstract: A heat exchanger assembly includes a plurality of fluid flow pathways including fins. Closure bars associated with each of the layers have a core reinforcing portion. Each core reinforcing portion includes first and second reinforcing members with a modified flow passage between them. The example embodiments include modified flow passages with generally C-shaped cross sections. The reinforcing portions preferably extend toward a center of the heat exchanger core varying distances along the body of the core so that reinforcing material is concentrated near the ends of the core where deformation caused by heat stress is most likely to occur.

Abstract: Disclosed is a plate for stack type heat exchangers and heat exchanger using such plates. A plurality of small protrusions 25 formed on the plate 2 are regularly arranged in the pattern of a diagonal lattice so that the ratio of the area S of the rectangle (which is defined by the longitudinal partition protrusion, a flange and two center lines passing through two neighboring round protrusion rows) to the width L of the plate falls within the range of 0.89 mm≦S/L≦1.5 mm. The outlet-side flange portion of the flange of the plate and a round protrusion of the round protrusions nearest to the outlet-side flange portion are preferably arranged so that the width Gs of the passage between the outlet-side flange portion and the nearest round protrusion falls within the range of 0.15 mm≦Gs≦1.6 mm.

Abstract: A regenerative circuit structure is built up by implementing the following steps in particular: an intermediate layer is made on a support core representing the inner profile of the structure; a series of channels regularly distributed around the core is made with the channels opening to face the intermediate layer, each of the channels being provided with a soluble insert; the support core is preheated and the body of the structure is made by thermal spraying under a vacuum; channels are machined in the body from the outside, and said channels are filled by means of soluble inserts; a closure layer is formed to close the channels in the body, and an outer envelope is formed by thermal spraying under a vacuum, after preheating; and all of the soluble inserts and the intermediate layer are eliminated.

Abstract: The invention relates to a flat tube of a heat exchanger in heating installations or of a radiator of a motor vehicle which is folded from a flat sheet metal of aluminum or an aluminum alloy and across the respective flow of which spacers or the flat sides of the flat tube brazed or soldered to one another are distributed, which are designed as dents of the flat sides of the flat tube on one or both sides. According to the invention it is provided that in the same flow in addition to the spacers embossments freely projecting into the flow are distributed as turbulence-generating flow obstacles at least at one flat side of the flat tube.

Abstract: A heat exchanger, e.g. an evaporator, has end plates arranged at two opposite axial ends and at least a part of which is secured, particularly by brazing, to an orientation plate. At least one edge of said part has no region which is not secured to said orientation plate.

Abstract: A spring clip that has rocking and force profiles with attachment configurations is disclosed. The spring clip made out of spring quality material such as stainless steel and the spring clip includes special provisions for mounting a cylindrical cooling device (i.e. a heat sink). Swinging arm principles are used to form force profiles that ensure that a load center of the clip is always on a fulcrum axis thereby focusing the force of the clip on a required load axis. The spring clip can accommodate higher manufacturing deviations without sacrificing the functional requirements. Moreover, the spring clip allows the heat sink to be inserted and then rotated in order to mount the heat sink on the component to be cooled thereby ensuring easy insertion of the heat sink and easy removal of the heat sink when the component being cooled requires replacement or repair. The spring clip can be manufactured at a low cost using stamping and forming processes.

Abstract: A heat exchanger having a plurality of stacked plate pairs consisting of face-to-face mating plates with each plate having a peripheral flange and annular inner and outer primary bosses. Each boss has a portion thereof located in a common first plane with the peripheral flange. An annular secondary boss has a portion thereof located in a second plane spaced from the first plane. Intermediate areas between the inner and outer primary bosses have spaced-apart portions to form inner flow passages. Both the primary and secondary bosses have openings formed therein for the passage of heat exchanging fluids. In back-to-back plate pairs, the secondary bosses are joined and the openings therein communicate to define a manifold for a second of these fluids. The inner and outer primary bosses include radially extending ribs formed about the circumference of each boss and extending substantially across the boss.

Abstract: A fixing structure of a radiator includes a base plate, and a heat-sink seat to form a radiator. The base plate is provided with a combination tube defining a through hole. The heat-sink seat is provided with an ear plate that defines a hole aligning with the through hole of the combination tube for passage of a snap connecting rod which has a first end provided with a cap head, and a second end provided with a snap connecting portion. The snap connecting portion may pass through the through hole of the base plate and the hole of the ear plate, and may be locked and snapped on the other side edge of the positioning hole of a fixing plate.

Abstract: The invention relates to heat-exchanger tubes structured on both inner and outer sides with excellent heat-transfer characteristics, which have recesses on the outside and ribs with specific dimensions on the inside. The structuring tools utilized for the various method modifications are adjusted in such a manner that they are not only able to create aligned, continuous grooves and non-aligned, spaced apart recesses but also secondary structures. The heat-exchanger tubes provided preferably with smooth end sections and smooth intermediate sections are utilized in particular in shell and tube heat-exchangers.

Abstract: A multipass heat exchanger with return bends between passes has its first return bend which varies in cross sectional area in the direction of the of the gas flow. The cross sectional area first increases so as to thereby reduce the velocity of the flue gas, decrease the flue side heat transfer coefficient and decrease the resulting hotspots. The cross sectional area is then increased in a more downstream portion of the return bend so as to not increase the overall height of the heat exchanger. The variation preferably occurs throughout the entire span of the return bend, with the increase in cross sectional area beginning at the start of the return bend.

Abstract: A plate heat exchanger comprising a stack of heat transfer plates which together with sealing means define first and second flow passages for first and second fluids respectively. The heat transfer plates are formed with through holes defining an inlet channel communicating with the first flow passages and a gasket is arranged around the through holes in the gap between each pair of heat transfer plates forming a first flow passage. The gasket can be inserted in and/or removed from the gap between a pair of permanently joined heat transfer plates and can include a tube for producing a pressure drop for flow of fluid from the inlet passage to the first flow passage.

Abstract: The present invention provides an improved retaining tool of heat radiator comprising a heat radiator and two retaining tools. Slide grooves are disposed at two opposite sides of the heat radiator. The slide grooves can join the two integrally formed retaining tools. A first hook board, a long board body, and a second hook board are formed on each of the two retaining tools. The first hook boards and the second hook boards can be hooked and joined at the bottom of a heat-emitting element (e.g., a chip or a CPU) of a motherboard. Each of the long board bodies has two protuberances and two resilient sheets to effectively prevent the retaining tools from detaching when being joined in the slide grooves at the two sides of the heat radiator.

Abstract: A heat exchange cell for a recuperator includes top and bottom plates sandwiching a matrix finned member and a pair of header finned members. The top and bottom plates each include a pair of manifold openings, and the header finned members each include a curved free edge following the curvature of an associated manifold opening. The header finned member includes a high fin density portion along the free edge and a low fin density portion communicating with the high fin density portion. The dual fin density header finned member thus provides increased structural strength along the free edge and provides a low pressure drop through the low fin density portion.

Abstract: A heat exchanger and method of transferring heat between fluids is disclosed using a plurality of stacked plate pairs consisting of face-to-face, mating, ringlike plates, each plate having an outer peripheral flange, an annular inner boss located in a common plane with the peripheral flange, and an offset intermediate area located between the peripheral flange and the inner boss. The peripheral flanges and inner bosses in the mating plates are joined together. The intermediate areas have outwardly disposed joined intermediate bosses having aligned inlet and outlet openings forming manifolds for the flow of a first heat exchange fluid circumferentially through the plate pairs from the inlet manifold to the outlet manifold. The heat exchanger also has a header enclosing either the inner bosses or the outer peripheral flanges to cause all of a second heat exchange fluid to pass between the plate pairs transversely relative to the flow of the first heat exchange fluid.

Abstract: A double-row heat exchanger coil includes intertwined inner and outer loops. The loops are situated to allow one continuous coil to be wound in an uninterrupted coiling operation, and later cut at several locations to create several individual circuits that are readily connected to each other in a parallel flow relationship.