Abstract: A plate-type heat exchanger for hot gas engines of the Stirling type includes stacked pairs of elongated rectangular plates joined at the longitudinal edges with spaces between the paired plates constituting the cold gas flow passages and spaces between plate pairs constituting the hot gas flow passages. Paired plates have mirror image protrusions protruding from the respective abutted longitudinal margins, which protrusion form the internal cold gas flow passages and also provide the spacing between adjacent abutting pairs that constitutes the hot gas flow passages. Abutting plates of adjacent stacked pairs are joined at the abutting transverse margins.

Abstract: A heat extractor for picking up waste heat from flue gases is disclosed. The extractor attaches to the stove pipe of a furnace or stove. Air is introduced into the extractor in a spiral flow pattern which is reversed after the air is heated. Air flows into the room from the extractor in a 360.degree. pattern.

Abstract: A heat exchanger including the multiplicity of elongate laterally spaced parallel tubes, each of which is formed with circumferentially spaced longitudinally extending radially outwardly projecting lobes which are semi-circular in cross-section and circumferentially spaced longitudinally extending radially outwardly opening intermediate grooves which are semi-circular in cross-section and wherein related lobes and grooves of adjacent tubes are interengated with their opposing semi-circular surfaces in uniform spaced relationship from each other whereby a labyrinth of passages of substantially uniform cross-section, through which a fluid medium can flow, occur about and between all adjacent related tubes whereby more uniform lateral flow of a fluid medium about and between adjacent tubes is attainable.

Abstract: An air-circulating assembly includes a motor driven fan and a shroud supporting the fan. The assembly is characterized by a support structure for extending about and engaging an existing stove pipe for removably attaching the shroud to the exterior of the stove pipe so that the fan moves ambient air past the stove pipe to heat the ambient air.

Abstract: A device for diverting discrete cleaning bodies carried in a fluid flowing through a tubular heat exchanger from the main stream of the fluid consisting of a diverter casing through which an axial current flows and a separating sieve system disposed therein having at least one sieve surface disposed at an angle to the flow and terminating at the downstream end in a lateral outlet connection. The at least one sieve surface being pivotable for cleaning purposes to such an extent that the sieve surface that was on the upstream side comes to be situated on the downstream side. The at least one sieve surface terminates in the vicinity of the diverter casing wall and a transition surface is disposed between the upstream sieve surface and the casing wall, the radius of curvature or angle between the transition surface and the casing wall being selected such that the cleaning bodies are prevented from becoming wedged.

Abstract: A heat exchanger core is formed from a single foil strip folded into successive U-bends to define alternate fluid passages, with even-numbered passages being for hot fluid and odd-numbered passages being for cold fluid. The folded foil thus defines three walls of each passage with the remaining fourth side open. Top and bottom plates cover and close the open sides of all the hot and cold passages respectively. The ends of certain passages remain open; the ends of other passages are selectively closed by pinching together the ends of adjacent foil walls which define the passages. A pre-formed end plate has apertures between deformable ribs; the apertures are aligned with the ends of open passages, and the ribs overlie and are joined with the pinched ends of the closed passages.

Abstract: A heat exchanger having an outer shell with an elongated, semi-circular fluid duct plate mounted in the shell. A tube bundle slidable between the duct plate and the shell is fixed at one end relative to the shell. The fluid inlet and outlet configuration, and transverse fluid flow pattern, are typical of those described in U.S. Pat. No. 3,532,160. The exterior of the tube bundle is partially covered with a shrouding to contain the fluid flow within the tube bundle by allowing the fluid to exit only through the outlet side. Sealing mechanisms running longitudinally between the shrouding and the upper duct plate, and between the shrouding and the shell, provide a seal which restricts the fluid flow to a transverse flow through the tube bundle. A seal between the supported end of the tube bundle and the shrouding confines the fluid flow in the bundle and allows for relative expansion of the shrouding and the bundle.

Abstract: Double walled tube assemblies to meet local code requirements for heat exchangers passing potable water therethrough in non-contacting heat exchange relation for example refrigerant to liquid heat exchangers for reclaiming heat from refrigeration cycles and systems have a first or outer tubular member for passing a first fluid such as hot compressed refrigerant gas therethrough and a second or inner tubular member connected for operative relation to the first tubular member for passing the potable water to be heated therethrough. The second or inner tubular member shaped, sized, and connected to the first or outer tubular member to establish optimum heat exchange relation between the first tubular member and the second tubular member when formed into heat exchange units.

Abstract: A heat exchanger comprises a plurality of layered units of tube assemblies, each tube assembly unit comprising a tube made by two plates having a refrigerant inlet opening and a refrigerant outlet opening, and a spacer block is disposed between the upper and lower tube assemblies for forming an air passage having an air inlet side and an air outlet side. The refrigerant inlet opening is provided in the lower plate of the tube adjacent the air inlet side. The upper and lower tube assembly units are alternately arranged with respect to the refrigerant inlet and outlet openings. The spacer block has an opening for communicating the refrigerant outlet opening of the lower tube assembly unit with the refrigerant inlet opening of the upper tube assembly unit, such that the refrigerant mainly flows in a portion in the tube adjacent the air inlet side.

Abstract: An intermeshing passage manifold is a device for subdividing each of two passages of ducts connected to it into multiple adjacent separate intermeshed passages. The intermeshing passage manifold is to be used for heat exchangers and fluid mixing devices in order to minimize pressure (energy) losses and to satisfy geometric constraints in many applications. The intermeshing passage manifold consists of a number of manifold sections adjacent in an end-to-end manner. Each of the manifold sections consists of a number of passage modules adjacent in a side-by-side manner. Each passage module consists of two passages; the orientation of these passages at one end of a module is at right angles to the orientation of the passages at the other end of the module, however, the cross-section shape of the module remains the same throughout its length.

Abstract: A heat exchanger comprising a rectangular exchanger pack which consists of a plurality of individual, mutually spaced, foil-type plates which have triangular corner notches and are connected with one another in sealed manner on marginal strips which extend between the corner notches in pairs on two opposite plate margins for the formation of alternately crossing flow-through passages between the plates, and comprising a frame housing surrounding the exchanger pack comprising two covers disposed adjacent the outer plates of the exchanger pack and four struts connecting the covers at their corners. The marginal strips to be connected of each two adjacent plates of the exchanger pack rest flatly upon each other and are mechanically connected with each other by folding over at least once. The struts of the frame housing define a triangular recess on their side facing the edge of the exchanger pack. The pack edges with the corner notches project into these recesses.

Abstract: A protective device is provided for heat emitting structures including but not limited to exhaust manifolds for internal combustion engines. A protective device comprises a double-wall protective screen consisting of two metal sheets which are spaced apart and substantially parallel. The space between the metal sheets is bridged over to support these sheets against each other. The sheets are sealingly connected along their edges so that they enclose between the support points at least one coolant space connected to at least one coolant connection arranged on the edge of the protective screen.

Abstract: Component for a heat exchanger which exchanges heat between the environment and a liquid, having at least one tube for receiving the liquid, and at least one heat exchange surface heat-conductively connected to the tube, the heat exchange surface including a multiplicity of plate elements fastened to the tube, the plate elements being disposed in a row side by side and overlapping each other in adjoining regions.

Abstract: A rotary heat exchanger characterized in that a spherically coiled heat transfer bypass tube is provided concentrically about a reflux type heat transfer double-tube at a part thereof, the outer tube of the double tube being rotatable, wherein a suction tube is provided around the outer tube within the spherical space defined by the bypass tube, said suction tube incasing screw vanes secured to the outer periphery of the outer tube, whereby convection is induced within the spherical space by the rotation of the outer tube. With the exchanger, good heat exchange efficiency is attainable without scaling.

Abstract: Nuclear reactor exchanger which assures the transfer of heat between two streams of coolant sodium. It includes an outlet connector which channels coolant sodium leaving a bundle of exchanger tubes traversed on the inside by the sodium and immersed externally in coolant sodium, and an inner tubular jacket forming a surface of revolution about a vertical axis and an outer tubular jacket. The wall of the inner jacket has a folded portion distinguished by at least one flank in the form of a crown.

Abstract: A heat exchanger, intended for use in hot water heaters, in which a tank and a hot water inlet pipe are formed integrally with each other, at a junction of which is placed a valve for control of the flow rate of hot water. The valve has a valve body disposed in close contact with a valve seat for rotation about its own axis relative thereto. Secured to the valve body is a rotary shaft which can be operated from outside. The valve body and the valve seat have respective through holes formed therein which can register with each other with their registered area variable to vary the flow rate of hot water with a change in the registered area of these through holes. The valve body is adapted to be placed in tight contact with the valve seat substantially solely by the pressure of hot water in the inlet pipe.

Abstract: A radiator comprising a number of parallel cooling medium pipes having fin stacks secured thereto in which a metal strip of the desired width dimensions is zigzag folded to form a stack having successive fin parts and side parts, each fin part being divided into stepwise parallel portions by additional fold areas parallel to the side parts.

Abstract: An undulating prismoid module made of relatively rigid material. The prismoids may have bases of any number of sides, and preferably a plane passing through the centers of the prismoid bases in any row of prismoid bases is nonparallel to the sides of the module. The modules may be stacked and fluid inlets and outlets provided in the void volume between modules so that the modules may be used as a heat exchanger, an extraction tower, absorption towers, distillation towers, an adsorption tower, chemical or bilogical reactors, and water cooling towers. The modules are disposed in repeating patterns of four in the stack, each module in the stack being rotated 180.degree. about a first or second horizontal axis with respect to the previous model.

Abstract: A heat exchanger comprises a plurality of first plates clamped in a frame-work. The plates are generally rectangular and have an opening at each of their corners, said opening forming together with corresponding openings of adjacent plates a first manifold duct for a heat exchanging fluid. A plurality of second plates have a recess at one or more of their corners, said recess corresponding to said openings of the first plates. A connection piece connected to said first manifold duct is clamped in the space formed by the recesses. All the plates have an additional opening forming a second manifold duct through which said first manifold duct is connected to the heat exchanging passages.

Abstract: A readily fabricated, compact toroidal or radial heat exchanger assembly (10) including fore and aft ring-like distributor tanks (11,12) and a generally circular core assembly (13) sandwiched therein between. The heat exchanger assembly (10) additionally includes a rotary blower (14), positioned radially inwardly of the core assembly (13) and distributor tanks (11,12), which is adapted to draw air axially and force the same radially outwardly through the core assembly (13) and around the distributor tanks (11,12). The ring-like distributor tanks (11,12) are provided with the interior and exterior fins (44,39) which function as heat transfer surfaces and thus the tanks (11,12), per se, are utilized as heat dissipating means along with the core assembly (13).