Abstract: A heat exchanger structured with a plurality of tube elements laminated alternately with fins over a plurality of levels and end plates at either end in the direction of lamination. A passage plate, in which a supply passage and a discharge passage for heat exchanging medium are formed, is provided on the side of one of the end plates, and an intake pipe and an outlet pipe for heat exchanging medium are connected to the supply passage, and the discharge passage respectively, of the passage plate. The supply passage and the discharge passage of the passage plate have sufficient length, to allow the intake pipe and the outlet pipe to be connected at arbitrary positions. It is possible to connect the intake pipe and the outlet pipe for heat exchanging medium at arbitrary positions for different types of vehicles. Also, a heat exchanger in which commonality of components is achieved.

Abstract: A heat exchanger including a core formed by a plurality of elongated plates joined together in pairs to define a series of passageways and a single tank. The tank has at least three separate fluid flow tunnels in fluid communication with the passageways to move fluid through the core. Each of the fluid flow tunnels includes an aperture extending through at least a portion of each of he tunnels. At least one of the fluid flow tunnels is offset from the others such that the centerline of the aperture associated with the offset tunnel lies outside a plane containing the centerline of the apertures through the other tunnels.

Abstract: For the sealing of a gap between at least two components or groups of components which are movably arranged with respect to one another, particularly of a heat exchanger, a device is indicated in the case of which a strip-shaped sealing body, which is connected with one component, is sealingly and movably guided in a groove of the other component, and in the case of which the sealing body is composed in the manner of layers of elements, in the longitudinal direction of the gap. The layers are arranged to be displaceable and freely expandable, are suspended at one component in a swivelling manner, and are spatially movably guided on the other component by way of the groove, with a clamping effect.

Abstract: A tube has a plurality of coolant passages inside which are separated by inner struts at center into an inlet passage side and an outlet passage side in the longitudinal direction of a core. On one end side of the tube inserted in a header are formed an inlet port and an outlet port through the tube in the direction of core lamination on either of the inlet passage side and the outlet passage side.Inside the header is disposed a separator, with the tube in an inserted state, in a position for separation between the inlet port and the outlet port of each tube. Since the header interior is divided to the front and rear sides of the core, there are formed, in the header, an inlet chamber communicating with a coolant passage on the inlet passage side through an inlet port, and an outlet chamber communicating with a coolant passage on the outlet passage on the outlet side through the outlet port.

Abstract: A heat exchanger has tubes and headers, with each tube having both ends connected to the headers in fluid communication. A blockish joint of the flange connection type is attached to one header, and an inlet port and an outlet port are formed in the joint. One or two blockish connectors also of the flange connection type and fixed to ends of external pipings are connected to the joint, such that an effective core area of the heat exchanger is increased, and an operation for connecting the external pipings is rendered simpler and more efficient.

Abstract: A heat exchanger (2) comprises an end tank (6) defining therein a fluid inlet (16) through which, in use, fluid enters the heat exchanger, and a fluid outlet (20) through which, in use, fluid leaves the heat exchanger (2), a plurality of heat exchange tubes (8) having end portions (10) at which the heat exchange tubes are connected to said end tank (6), a plurality of heat exchange fins (12) connected to the heat exchange tubes (8), a plurality of stubs (28) provided on said end tank (6) extending outwardly therefrom and defining passageways into said end tank, said heat exchange tube end portions (10) being dimensioned to receive said stubs (28), wherein the stubs (28) are each provided with two axially spaced annular grooves (29) on the outer surface thereof, a sealing "O"-ring (30) being seated in each annular groove (29) to provide a seal between the heat exchange tubes (8) and stubs (28).

Abstract: In a process for producing a heat exchanger comprising at least one header having a tubular wall is separated into compartments by a substantially disc-shaped transverse partition. The partition is introduced into the tubular wall through an open end of the wall to bring it into the position it has to occupy. Then, the partition is deformed by means of punches comprising annular ribs applied against the two faces thereof by expanding it radially so as to immobilize into position by clamping within the tubular wall. The invention is particularly applicable to condensers for air conditioning units of motor vehicles.

Abstract: A parallel flow condenser having a plurality of substantially flat, parallel flow tubes are positioned between oppositely disposed headers. The flow tubes provide fluid communication between the headers for cooling fluid which flows through the condenser. Each of the headers is formed from an inner member having an inner wall and a pair of longitudinally extending, parallel sidewalls which protrude outward from the inner wall. The parallel sidewalls terminate in outer edges. An outer member is provided having an outer wall and a pair of longitudinally extending attachment flanges which project inward from the outer wall. The attachment flanges are positioned between the parallel sidewalls of the inner member with the attachment flanges overlapping and joining one of the parallel sidewalls so that the inner and outer members are effectively joined together to form a fluid passage.

Abstract: An air-cooled oil-free rotary-type compressor in accordance with the invention includes a first air cooler including a plurality of cooling pipes, a check valve, and a second air cooler. The first air cooler, the check valve and the second air cooler are provided in a passage of compressed air discharged from a compressor body. The second air cooler is disposed in a first cooling air flow direction and the second air cooler is disposed in a second cooling air flow direction substantially perpendicular to the first cooling air flow direction. The plurality of cooling pipes of the first air cooler are arranged along the second cooling air flow direction.

Abstract: A multi-pass evaporator (10) of a heat exchanger for a motor vehicle air-conditioning system includes a plurality of heat exchanger tubes (12a-t) coupled to first and second header tubes (30,32) disposed side by side. The first header tube contains an inlet tube (48) extending from an inlet end (38) of the first header tube (30) to a position intermediate the length of the first header tube (30). The ratio of the axial cross-sectional area of the interior of the inlet tube (48) to the axial cross-sectional area of the space between the first header tube (30) and the inlet tube (48) is in the range of 1:4.0 to 1:7.0. The axial cross-sectional area of the interior of the inlet tube (48) is equal to or greater than 35 mm.sup.2. This ratio of areas and size of inlet tube has been found to reduce considerably noise produced during use of the evaporator.

Abstract: A plate-fin heat exchanger 10 is disclosed including a plurality of flat pipes 14 interleaved with a plurality of fin members 16. The flat pipes 14 are formed from a plurality of plate members 12. The heat exchanger 10 also includes a plurality of fin members 16 and a pair of fluid manifolds 22, 24. The manifolds 22, 24 engage the heat exchanger 10 along either of two axes which are perpendicular to the longitudinal axis of the tank 20 of the heat exchanger 10.

Abstract: A multi tube evaporator with tubes having elongated side passages interconnected by an end crossover passage. The tube has oblong internal bumps in the side passages that have a low angle with the normal and partly spherical bumps in the crossover passage arranged so that heat transfer between the air passing past the tubes and the refrigerant passing through the tubes is by conduction through the walls of the tubes and the boundary layer of refrigerant moving along the inner walls of the tube and by forced convection of heat energy between the boundary layer and the main flow of refrigerant flowing therethrough. The low angle bumps in the side passages provide the least amount of drag of the refrigerant while effectively reducing the thickness of the boundary layer thereof to reduce its insular effect. The spherical bumps in the crossover are insensitive to the direction of flow and help provide a low pressure drop for effectively increasing efficiency of the evaporator.

Abstract: The modular heat exchanger system comprises at least a primary heat exchanger having two parallel manifolds with a chosen plurality of heat exchange tubes running therebetween, the manifolds defining a water pathway therein within which baffles are provided to produce a serpentine path through the manifolds and heat exchange tubes of the exchanger, one of the manifolds being an intake manifold and the other being a return manifold having a terminal return chamber, the chamber feeding into a return tube extending through the manifold and exiting the opposite end thereof, the tube being of smaller diameter than the manifold and creating an annular channel therearound through which liquid flowing through the exchanger is routed.

Abstract: A heat exchanger for a refrigeration circuit for condensing gaseous refrigerant and incorporating an integral refrigerant subcooler. The heat exchanger utilizes an oversized header communicating with the heat exchanger coils of sufficient volume to serve as a reservoir for condensed refrigerant eliminating the need for a separate receiver receptacle. Refrigerant subcooling occurs at the lower region of the receiver whereby the subcooler is automatically provided with liquified refrigerant from the condensing portion of the heat exchanger.

Abstract: In the purification of gases generated in metallurgical and similar furnace operations, the impurities include solid particles and compounds or elements which are gaseous at the furnace temperatures and only form solid or liquid at temperatures approaching ambient conditions. Proper cleaning therefore requires cooling of the gases to at least the water dew point to cause these impurities to form as particles or droplets. This invention describes an apparatus for collecting such particles or droplets in which a charging device and condensation equipment are combined to provide a simple, yet effective apparatus at a fraction of the cost of conventional apparatus.

Abstract: A multi-pass U-flow type evaporator for an air conditioning system provided with a flow control insert which allows the inlet port and the outlet port to be located on the same face of the evaporator core and in close proximity to each other.

Abstract: A vaporizer for liquefied natural gas which prevents the heat exchanger tubes from being extremely cooled, without reducing the vaporizing efficiency. The vaporizer is characterized in that each of the heat exchanger tubes connecting the lower header and upper header contains a pipe for liquefied natural gas in a certain region from its end near the inlet, said pipe having on its outer surface fins which are in pressure contact with the inner surface of the heat exchanger tube, and the heat exchanger tube is in direct contact with the natural gas in its region near the outlet and beyond the region in which the pipe for liquefied natural gas lies.

Abstract: Spacer supports are connected to a matrix of heat exchange tubes of a heat exchanger to maintain the heat exchange tubes in spaced relation and resist overheating by hot fluid flowing around the tubes and the spacer supports. The spacer supports are in the form of hollow tubular bodies in which the heat exchange tubes are supported in spaced relation. The heat exchange tubes communicate with the interior of the hollow bodies so that flow of a heatable fluid in the heat exchange tubes is conveyed through the hollow body to wet the interior thereof and cool the same.

Abstract: A multi-layered type heat exchanger for a refrigerant fluid circuit is disclosed which includes a plurality of substantially parallel flat tubes. Each flat tube includes a partition wall for dividing its interior into two fluid passages. A plurality of fin units are disposed between the plurality of flat tubes. A header pipe has a plurality of slits for inserting upper ends of the flat tubes, respectively, and at least one partition wall to divide the interior thereof into at least two chambers. A seal member sealingly closes lower open ends of the flat tubes. Thus, since the height and length of the flat tubes can be easily adjusted, various sizes and designs of heat exchangers can be easily and cost effectively produced.

Abstract: A swimming pool or spa heater unit having a heat exchanger manifold designed to permit the use of direct plastic piping connections to the manifold header. The manifold is principally characterized by a header end having an inlet port and outlet port located on a level below the manifold inlets and outlets communicating with the heat exchanger. The inverted arrangement of the header ports relative to the manifold inlets and outlets to the heat exchanger permits unreturned water in the unit heated by residual heat from the heater to form a temperature gradient therebetween which prevents the temperature of the water at the header connection from reaching a level incompatible with the use of direct plastic piping connections. The manifold is also integrally provided with weirs which serve to provide dry-fire protection for the heater.

Abstract: An evaporator for an automotive air conditioning refrigeration circuit includes first and second header pipes, a plurality of communicating members which comprise a substantially U-shaped communication path therein, and a corrugated fin unit fixedly disposed between the U-shaped flat pipes. The first and second header pipes are disposed parallel to each other. Each of the U-shaped flat pipes includes a pair of straight portions and a U-shaped curved portion which connects the lower ends of the straight portions. An upper end of one of the straight portions is fixedly and hermetically connected to the first header pipe, and an upper end of the other straight portion is fixedly and hermetically connected to the second header pipe. The pair of the straight portions and the U-shaped curved portion of the U-shaped flat pipe extend along a plane which is parallel to the flow direction of air passing an exterior surface of the evaporator.

Abstract: A tube supporting member for an automotive heat exchanger is disclosed wherein the support member includes a plurality of apertures each having a cylindrical ferrule portion extending therefrom. The apertures include a curvilinear portion terminating in a discontinuous radius to form a corner at the aperture. The ferrule portions support the tube members of the heat exchanger.

Abstract: A header for a flat tube liquefier is composed of first and second components. The first component is provided in a tube bottom with receiving slots for the flat tubes and the second component complements the header structure, with the two components following one another in two overlap zones that extend along the length of the header and seal the two components against each other. A solder connection is provided in the respective overlap zone. If in these two overlap zones the first component is arranged to lie on the outside and the second component on the inside, the first component grips around the second component toward the interior and/or the second component is disposed completely within the outer width dimension of the first component. Moreover, beads may be formed in the tube bottom at both sides of the respective receiving slot at the side of the receiving slot that faces away from the curvature of the tube bottom.

Abstract: A shell-and-tube heat exchanger with a tube sheet having partition grooves used to form joints with partition plates contained within the exchanger head. The partition plates define chambers within the head of the exchanger which direct the fluid through the exchanger tubes and which allow for the use of an unequal number of tubes per tube-side pass.

Abstract: Low efficiency in an evaporator for a refrigerant may be increased by providing the evaporator with at least two passes (10, 12) defined by two rows of tubes (20) and four elongated header passages (24, 26, 28, 30) with the header passages (24, 26) being in fluid communication with the tubes (20) in the pass (10) and the header passages (28, 30) being in fluid communication with the tubes (20) in the pass (12). The pass (10) is downstream from the pass (12) and includes an inlet (32) to the header passage (24) intermediate the ends thereof. An outlet (34) is located in the header passage (28) for the pass (12) and intermediate the ends thereof.

Abstract: An improved evaporator or evaporator/condenser for use in refrigeration or heat pump systems including first and second spaced, pressure resistant headers (10, 12) ; a plurality of elongated tubes (20) of flattened cross-section extending in parallel, spaced relation between and in fluid communication with the headers (10, 12) and serpentine fins (34) extending between and bonded to adjacent ones of the tubes (20). The tubes (20) and fins (34), between the headers (10, 12), define a nonplanar configuration having an apex (80). A condensate trough (82) is aligned with and opens towards the apex (80) to receive condensate dripping therefrom.

Abstract: An apparatus for removing moisture from a hot compressed gas before the gas is delivered to a work tool. The apparatus includes a unitary rigid structure composed of a central core, with a header mounted on each side of the core. The central core includes a recuperator section and an aftercooler section, and the headers define air passages whereby the air passing through the apparatus is first cooled in the recuperator section, further cooled in the aftercooler section, and then reheated in the recuperator section. A water separator is positioned at the location where the gas reaches its lowest temperature, and such that upon reheating, a relatively dry and hot gas may be delivered to the work tool.

Abstract: A manifold for a heat exchanger including a plurality of substantially identical heating tubes. The manifold has front and rear walls. The rear wall has therein a plurality of inlet ports, each of which is adapted to be connected to the outlet of one of the heating tubes, the inlet ports being generally equally spaced along the rear wall in the upper half of the manifold. The rear wall also has therein a plurality of outlet ports, each of which is adapted to be connected to the inlet of one of the heating tubes, the outlet ports being generally equally spaced along the rear wall in the lower half of the manifold. The front wall has therein a water inlet opening into both the upper manifold half and the lower manifold half, and a water outlet spaced horizontally from the water inlet and opening into both the upper manifold half and the lower manifold half.

Abstract: A tubular type heat exchanger unit which utilizes upper inlet and outlet headers which are each series connected to at least three lower parallel headers by multiple elongated vertically-oriented tubes. The lower headers are connected together by a plurality of vertically-oriented U-shaped tubes provided in adjacent banks and rows within a thermally-insulated casing. The U-shaped tubes in each tube row are arranged in a staggered pattern relative to the tubes in the adjacent row. Preferably 4-12 lower headers each having a bank of 4-20 vertical tubes are provided. Such heat exchanger unit is enclosed within a thermally-insulated casing and is suitable for use as an economizer and superheater in heat recovery steam generators (HRSG).

Abstract: A condenser adapted for use in the car cooling system, the condenser comprising a pair of headers provided in parallel with each other; a plurality of tubular elements whose opposite ends are connected to the headers; fins provided in the air paths between one tube and the next; wherein each of the headers is made of a cylindrical pipe of aluminum; wherein each of the tubular elements is made of a flat hollow tube of aluminum by extrusion; and wherein the opposite ends of the tubular elements are inserted into slits produced in the headers so that they are liquid-tightly soldered therein.

Abstract: A heat exchanger for a refrigeration circuit includes a plurality of fluid tubes aligned in a parallel relationship with each other and corrugated fins disposed therebetween. A pair of header portions are connected with the ends of the fluid tubes. The header portions includes plate members which have a plurality of elongated holes for receiving the ends of the fluid tubes therein. Cup-shaped members are disposed in sealing contact with end surfaces of the plate members to cover the ends of the fluid tubes. With this construction, the refrigerant passageways can be securely maintained. Further, the core of a heat exchanger can be shaped to conform to the space available for mounting the heat exchanger, to thereby enhance the efficiency of the heat exchanger.

Abstract: A heat exchanger tank partition device in which tank portions are partitioned into chambers by partition plates held between a pair of separable tank plates. These partition plates can be located into the required position, which facilitates assembly and provides good precision and brazing integrity. The result is a simple and secure arrangement which minimizes the risk of leakage of the heat exchange medium occurring.

Abstract: A method and apparatus for forming a heat exchanger assembly including wrapping a one-piece heat exchanger tube onto a heat transfer unit having a plurality of fins on upper and lower surfaces, the fins being provided with notches which are aligned in sets with each set of notches receiving a section of the heat exchanger tube as it is wrapped around the heat transfer array, return bend portions of the heat exchanger tube being formed in the wrapping process to have a generally rectangular cross section to maximize the cross sectional area of the heat exchanger tube in the return bend areas of the tube. Apparatus for forming the heat exchanger assembly includes a mandrel for rotating the fin unit, drawing the heat exchanger tube around the fin unit, and forming devices mounted on the mandrel to define the pitch of the return bends and to maintain the cross section of the heat exchanger tube in the return bend portions generally rectangular in shape when the heat exchanger tube subsequently is expanded.

Abstract: A heat exchanger apparatus includes a pair of tanks with parallel tube passes and air centers connected therebetween for cooling the engine fluid, such as a coolant, by the air intake stream to the vehicle. The tanks are formed by an extrusion forming three sides thereof and a header is brazed thereto for forming the fluid chamber in the tanks. The extrusion includes a die formed pocket therein to receive the sides and one end of a partition member and the second end of the partition member is curved to abut the header. The curved second end has flanged ears therein that seat in segments of the die formed pocket which are laterally outwardly of spaced sides segments of the pocket to position the partition within the pocket so that an outer surface thereon will be positioned against a header to form a braze seal between the partition and both the header and the extruded tank.

Abstract: A heater of a vehicle includes a pair of tank units with fluid tube passes and air centers formed therebetween. The tank units include a separate tank extrusion and header. The tank extrusion comprises a generally U-shaped extrusion with recesses provided on the exterior side of the side walls of the U-shaped extrusion. A mounting flange extends from one side wall of each tank extrusion. The header includes deformable tabs which extend over the recesses to allow clinching of the header to the tank extrusion. The mounting flanges slide within notches of a plastic case in the air module for sealing and securing the heater to the module.

Abstract: A laminated type evaporator for an automotive air conditioning refrigerant circuit is disclosed. The evaporator includes a plurality of tube units having a pair of tray-shaped plates. A pair of conduits for distributing the refrigerant to the interior region of each of the tube units and for receiving the refrigerant from the interior region of each of the tube units are connected to the top surface of the tube units. Communication between the plurality of tube units is obtained through separately formed conduits, thereby obviating the need to form an internal passageway during the formation of the tray-shaped plates and thus simplifying the manufacturing process of the evaporator.

Abstract: A parallel flow vehicle air conditioning condenser utilizes baffle plates with an interference fit. The baffle plates locate within header and tank assemblies. Parallel tubes extend between the header and tank assemblies for causing refrigerant flow between the header and tank assemblies and through the tubes. The header and tank assembly is made up of two portions which are brazed together. The baffle plate has abutment edges that abut the interior walls of the two portions in an interference fit to deform the walls and cause sealing.

Abstract: Low efficiency in an evaporator for a refrigerant may be increased by providing the evaporator with at least two passes (10, 12) defined by two rows of tubes (20) and four elongated header passages (24, 26, 28, 30) with the header passages (24, 26) being in fluid communication with the tubes (20) in the pass (10) and the header passages (28, 30) being in fluid communication with the tubes (20) in the pass (12). The pass (10) is downstream from the pass (12) and includes an inlet (32) to the header passage (24) intermediate the ends thereof. An outlet (34) is located in the header passage (28) for the pass (12) and intermediate the ends thereof. At least one fluid passage (36) extends between the headers (26, 30) intermediate the ends thereof.

Abstract: A heat exchanger includes a pair of header tanks (4) placed in parallel to each other in a plane; a row of parallel tubes (2) placed in the plane and connected at opposite ends to the header tanks; a plurality of partitions (6, 6') provided in the header tanks to divide each header tank into a plurality of compartments (8a) along the length of the header tank thereby forming a plurality of refrigerant passages (2A, 2B) each consisting of a plurality of multitube paths each having a plurality of the parallel tubes; and a pair of additional tanks (7) each attached to each of the header tanks to form a chamber (8) which communicates with the refrigerant passages through ports formed on the header tank whereby refrigerant is distributed into the plurality of refrigerant passages to provide the reduced flow resistance of refrigerant.

Abstract: A condenser adapted for use in the car cooling system, the condenser comprising a pair of headers provided in parallel with each other; a plurality of tubular elements whose opposite ends are connected to the headers; fins provided in the air paths between one tube and the next; wherein each of the headers is made of a cylindrical pipe of aluminum; wherein each of the tubular elements is made of a flat hollow tube of aluminum by extrusion; and wherein the opposite ends of the tubular elements are inserted into slits produced in the headers so that they are liquid-tightly soldered therein.

Abstract: A manifold and a method of making a manifold for a tube and fin type heat exchanger are disclosed wherein the manifold is a one piece aluminum extrusion. The method includes the steps of extruding the material into a U-shaped channel having a base member and a pair of vertical walls, forming a plurality of fluid conducting passageways in the base member, and rolling the vertical walls toward the longitudinal center of the base member until the free ends of the walls contact the base member to form a pair of hollow longitudinal fluid conduits. The conduit are then crimped at predetermined locations to form fluid baffles and the manifold is then sealed.

Abstract: A combination radiator and condenser apparatus has a pair of extruded tank and header assemblies adapted to be connected in both a coolant systsem for liquid cooled engine and a refrigerant system of an automobile air conditioning system. The assemblies each include an extruded tank with two compartments separated by an internal partition which extends the full height of the tank and each extruded tank further includes a slotted wall for receiving the ends of a plurality of unitary extruded fluid flow tubes extending between each extruded tank. Each of the unitary extruded fluid flow tubes have first and second passages therein connected respectively to the coolant chamber and the high pressure refrigerant chamber of each of the extruded tanks. The extruded tubes of the coolant passage and the refrigerant passage are separated by a connecting member for preventing the heat conduction from the coolant to the refrigerant. The connecting member may be a thin web or two web connection forming an air space.

Abstract: A heater core includes an inlet tank, a return tank, and an outlet tank. A plurality of parallel inlet flow tubes extend from the inlet tank to the return tank. A plurality of outlet flow tubes extend parallel to the inlet flow tubes between the return tank and the outlet tank. Corrugated cooling fins are disposed between adjacent inlet and outlet flow tubes. A perforated inlet baffle plate is disposed angularly within the inlet tank. The inlet baffle plate has a calculated angular orientation, length, and spacing within the inlet tank. An unperforated return baffle plate is disposed in the return tank. The return baffle plate has a calculated length and spacing within the return tank. The inlet baffle plate and return baffle plate provide uniform coolant flow through the plurality of inlet and outlet flow tubes.

Abstract: A heat exchanger apparatus includes first and second parallel tank units with a core of parallel tube passes and air centers extending therebetween for cooling the fluid in the tanks and flowing through the tube passes. The first tank unit includes an integral main tank and outlet tank. The main tank is connected to an inlet fitting for receiving refrigerant vapor and is in fluid communication with the tube passes. The outlet tank is parallel with the main tank and spaced from the tube passes and includes the outlet fitting for directing the high pressure refrigerant liquid to the evaporator of a refrigerant system in an automotive air conditioning system and an aperture between the main tank and outlet tank supplies refrigerant from the core to the outlet tank.

Abstract: A heat exchanger, finding its application typically as a cndenser in an air conditioning installation for a motor vehicle, comprises a fluid manifold having an elongated tubular wall which carries internal transverse baffles, together with a number of parallel heat exchange tubes penetrating into the manifold through apertures formed in the tubular wall. The transverse baffles are entirely located within the tubular wall and are secured to a connecting member which is elongated along the axis of the tubular wall, which enables the baffles to be fitted simultaneously and held in place, and which also serves as an abutment for the ends of the heat exchange tubes.

Abstract: A high efficiency fuel-fired condensing furnace is provided with a compact recuperative heat exchanger structure comprising a metal primary heat exchanger positioned above and operatively connected to the inlet side of a secondary heat exchanger formed from a polyetherimide (PEI) plastic material. The primary heat exchanger is formed from a horizontally spaced series of vertically serpentined metal combustor tubes, and the second heat exchanger if formed from horizontally spaced apart injection molded inlet and outlet collector boxes interconnected by a horizontally spaced series of elongated hollow extruded plate members sealingly secured at their opposite ends to the collector boxes with the side edge-to-side edge widths of the hollow plate members being vertically oriented. The outlet ends of the metal tubes are operatively connected to the plastic inlet collector box.

Abstract: A quick action coupling is disclosed for connecting simultaneously at least two pipes or hoses to the water box of a radiator or to the inlet and outlet members for the cooling fluid of a motor vehicle engine, said water box or said members comprising a generally cylindrical shaped chimney and n ways (n being a whole number at least equal to two) which open into said chimney, said coupling comprising n rigid conduits whose outlets into said connector are of a shape and position mating with the outlet orifices of said corresponding ways in the chimney of the water box or of said members so as to form n fluid circuits, as well as seals for sealing between the different fluid circuits with respect to each other, comprising: a male connector of a form mating with said chimney; and sealing of said circuits with respect to the outside is provided by a single additional seal whatever the number n of circuits.

Abstract: A heat exchanger having a pair of header pipes and at least one of the header pipes including at least one dividing wall which extends in the longitudinal direction of the header pipe and divides the cavity of the header pipe into at least two chambers. A plurality of slots are longitudinally spaced along the header pipes. An inlet tube is connected to one of the header pipes. An outlet tube is also connected to one of the header pipes. A plurality of fluid tubes are disposed between the header pipes and each fluid tube has a plurality of partition walls for defining fluid paths in fluid communication with the header pipes through the slots. A plurality of corrugated fins are disposed between opposed surfaces of the fluid tubes. Thus, the heat-exchanging efficiency of the heat exchanger increases and, in addition, the heat exchanger is able to balance the amount of the heat-exchanging and the pressure loss.

Abstract: A plate-type heat exchanger comprises a stack of flat tubes each composed of a pair of confronting core plates jointed to each other and defining a fluid passage. A cross sectional area of the fluid passage is increased along the flowing direction of tbe refrigerant. A plurality of ribs are disposed on the fluid passage. A flowing resistance of the ribs which are disposed near an outlet tank is lower than that of the ribs which are disposed near an inlet tank.

Abstract: A heat exchanger is formed by a pair of tanks with heat exchanger tubes connected therebetween. The tanks include a header plate with chamber indentions that cooperates with a tank plate to form a row of tank chambers for interconnecting the heat exchanger tubes joined to the header plate. The header plate has a plurality of tube indentations or dimples which extend at adjacent tube apertures and are contacted by a continuous tank rib on the tank plate within each chamber. The ribs and dimples provide substantially uniform contacting and sealing surfaces during brazing to strengthen the assembled header. The tank rib includes tube slots opposing the apertures in the tube plate to provide a stop for insertion of the exchanger tubes.