Abstract: A generator which can prevent deterioration of the chilling performance and corrosion, and can provide a high degree of reliability and long service life is disclosed. The high-temperature generator comprises a combustion chamber for flowing a combustion gas therein, a first tube assembly and a second tube assembly provided in the combustion chamber each of which has a plurality of heat transfer tubes for containing liquid therein. The first tube assembly comprises a plurality of bare tubes and is arranged at an upstream of the second tube assembly. The second tube assembly comprises a plurality of finned tubes provided with fins on the outer surface thereof. The heat transfer tubes are arranged in a staggered manner in a direction of the combustion gas flow within each of the first tube assembly and the second tube assembly.

Abstract: Disclosed is a heat transfer tube with grooves in an inner surface thereof, which is excellent in both evaporation performance and condensation performance. In the heat transfer tube with grooves in an inner surface thereof according to the present invention, groove processing regions 1 having a width W1 and groove processing regions 2 having a width W2 are alternately arranged in the inner surface thereof, and a linear groove region 3 having a width W3 extending in a longitudinal direction of the tube is arranged between the groove processing region 1 and the groove processing region 2. The width W1 is larger than the width W2. A group of grooves within the groove processing region 1 are helically formed at a torsional angle .theta.1 with respect to a longitudinal direction of the tube, and a group of grooves within the groove processing region 2 are at a torsional angle .theta.2 different from .theta.

Abstract: A heat exchanger fin includes a combination of a flat section, a wavy section, and a slit section arranged successively in a first direction, in order to compensate for different velocities of air passing across those sections, respectively, in a second direction transversely of the first direction, and thereby provide a uniform heat exchange rate across the fin.

Abstract: A cold plate includes two flow-wise isolated coolant (or refrigerant) passages (or sets of passages) for use in conjunction with separate refrigeration systems. The cold plate passages do not permit flow communication between distinct coolant (or refrigerant) paths. This permits two distinct cooling systems to operate in a redundant manner. Nonetheless, flow isolation is achieved while still maintaining tight thermal coupling between each path and the object, such as an electronic computer processor module, to be cooled.

Abstract: A heat exchanger tube for condensing steam with the use of cooling air includes an upper steam supply and a lower condensate discharge. The heat exchanger tube has an elongated cross-section in the flow direction of the transversely flowing cooling air. The interior of the tube is divided by a separating wall extending transversely of the flow direction of the cooling air into a condenser stretch whose cross-section becomes smaller in the flow direction of the steam and a dephlegmator stretch whose cross-section becomes smaller in the flow direction of the steam, wherein the condenser stretch is at the lower end thereof connected to the dephlegmator stretch for conducting steam from the condenser stretch to the dephlegmator stretch, and wherein a gas/steam mixture exhauster is mounted at the upper end of the dephlagmator stretch.

Abstract: A heat exchanger includes parallel fins and heat transfer pipes extending through the fins for conducting a heat transfer fluid. Each fin includes four groups of slit-forming grilles disposed between each vertically spaced pair of pipes. The first and third groups are disposed below a first pipe of the pair, and the second and fourth groups are disposed above a second pipe of the pair. The third group is disposed behind the first group, and the fourth group is disposed behind the second group, considered with reference to a direction of fluid flow. An intermediate slit-forming grille is located behind the first and second groups and in front of the third and fourth groups. The grilles of each of the first and second groups project from the fin by respective heights which become progressively greater in the direction of fluid flow.

Abstract: Plate eat exchangers are disclosed which accommodate variations in the relative proportions of liquid and vapour refrigerant, allowing the refrigerant in the two phases to remain in equilibrium throughout the flow path through the heat exchanger. The flow path can be arranged to be boustrophedonic so that it comprises first and second sets of alternating parallel sub-channels in which the resistance to flow of refrigerant fluid along each of the sub-channels of the first set is greater than the resistance to flow along the respective adjacent sub-channels of the second set. The configuration of the channel for the refrigerant through the heat exchanger can be arranged so that the resistance to the flow of refrigerant is greater towards one end than towards the other end.

Abstract: An S-shaped heat exchange tube with improved heat exchange efficiency. The tube is provided with a quartet of entry dimples in a first segment of the tube adjacent an inlet end of the tube, a first series of dimple pairs in a second segment of the tube and a second series of dimple pairs in a third segment of the tube.The quartet of entry dimples lie in a plane approximately perpendicular to a longitudinal axis of the first segment. At least the first three dimple pairs of the first series are graduated in depth, with the first dimple pair in the first series being provided adjacent to the first segment and having a depth less than a depth of the second dimple pair in the first series. The third dimple pair in the first series and all dimple pairs following the third dimple pair in the first series have depths which are equal. Depths of all dimple pairs in the second series are equal to the depth of the final dimple pair of the first series.

Abstract: A method of cooling electronic devices in an electronic assembly is proposed where the said assembly has at least one board that houses electronic modules. The methodology comprises shaping a light weight plate with apertures as to compliment the geometric shape of the assembly and board to be cooled; affixing coolant passage tubes in the apertures of the plate and finally cooling the electronic assembly by placing the assembly in thermal contact with the plate and passage tubes after a coolant is introduced in the passages.

Abstract: A multipass evaporator for an air conditioner includes a pair of spaced-apart and parallel headers, a plurality of microchannels extending between and connected to the headers, at least one throttling microchannel extending between and connected to the headers, and at least two baffles provided within the headers. The baffles are located in the headers to divide the plurality of microchannels and the throttling microchannel into at least three passes. The three passes include a first pass, a last pass, and at least one intermediate pass between the first pass and the last pass. The first pass includes the throttling microchannel which provides a desired restriction to obtain constant enthalpy expansion so that no restriction device is required between a condenser and the evaporator.

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 core plates forming a core body includes an upstream refrigerant passage for communicating an upper and a lower tank disposed at a downstream side and a downstream refrigerant passage for communicating an upper and a lower tanks disposed at an upstream side with respect to the air flow direction. Ribs are formed on an inner surface of the upstream refrigerant passage to agitate the refrigerant, and inner fins are provided on the inner surface of the downstream refrigerant passage which receives a refrigerant after passing through each the upstream refrigerant passage of each the core body.

Abstract: A refrigerant condenser is set so that, if its condensation distance is L, the equivalent diameter of a tube having a linearly configured passage for the purpose of heat exchange is de (each dimension being in units of mm), and the number of times the direction change of the linearly configured passage for the purpose of heat exchange change is N, with de.ltoreq.1.15 and the relationship L=(N+1)W=400+1,180 de to 700+1,180 de satisfied, a high heat exchange efficiency is achieved. In this refrigerant condenser, it is possible to use a single long winding tube.

Abstract: A heat exchanger which, in one embodiment, includes an elongate tube having a plurality of straight tube segments and a plurality of bent tube segments to form a generally oval spiral configuration is described. The straight tube segments form opposite sides of the exchanger, and the straight tube segments are configured to be located substantially perpendicular to a direction of air flow. A space is formed between the exchanger opposite sides, and the cross-sectional area of the space between the exchanger opposite sides continuously decreases from a first end of the exchanger to a second end of the exchanger. An end straight tube segment substantially extends over, or substantially covers or closes, an opening between opposing tube segments at the exchanger second end. A plurality of heat exchange fins project outwardly from the elongate tube. Due to its general shape, the above described heat exchanger sometimes is referred to herein as a pyramid exchanger.

Abstract: A heat exchanger for exchanging heat between first and second fluids. A plurality of vertically oriented passages are defined between alternating first and second passage walls. The first and second passages are provided for bringing the first and second fluids into a heat transfer relationship. To this end, the first passage incorporates an inlet and an outlet, for instance, to admit gaseous nitrogen into the top of the first passages and to discharge condensed nitrogen from the bottom of the first passages. An inlet is provided to introduce the second fluid into the second passages. The second fluid, which is a liquid is to be at least in part vaporized within the second passages. Liquid film, composed of the liquid, is distributed within the second passages by way of an arrangement of slotted dividing bars having staggered slots along the length of such slotted dividing bars to urge liquid against the passage walls defining the passages.

Abstract: Heat is transferred from a first fluid to a cooler second fluid with a heat exchanger having heat exchanger tubes in which the cooler second fluid flows, preferably in a counterflow to the first fluid. The heat exchanger tubes are arranged in more than three rows of heat exchanger tubes. The first fluid proceeds successively downstream through such rows in heat-transfer relationship with the heat exchanger tubes. Each downstream row of heat exchanger tubes has less throughput area for the first fluid than an adjacent upstream row of heat exchanger tubes as among at least the first three rows of heat exchanger tubes in the direction of flow of the first fluid. Each downstream row of heat exchanger tubes may have less heat exchanger tubes than an adjacent upstream row of heat exchanger tubes as among at least the first three of the rows of heat exchanger tubes in the direction of flow of the first fluid.

Abstract: A motor vehicle housing, for cooling automotive type accessory components, with a receptacle chamber designed for the installation of pre-determined components, and with a cooling chamber sealed with respect to the receptacle chamber and adjacent to it, which cooling chamber is connected with an inlet for coolant and with an outlet for the coolant, has been improved so that no coolant can get into the receptacle chamber, and the receptacle chamber has zones in which different degrees of cooling can take place. For this purpose the cooling chamber is provided with an integrated flow guide for the coolant which, in a first segment adjacent to the inlet, has an expanded portion which provides for a distribution of the coolant over a large surface, and in a second segment runs so that, in relation to a predetermined total length of the flow guide, the heat exchange surface of the flow guide assumes a maximum opposite the contact surface in this segment between the cooling chamber and the receptacle chamber.

Abstract: An improved radiant heat transfer tube with internal fins is provided. Optimum design characteristics for the number of fins, the height or length of the fins and the twist of the fins is provided to enhance convective and radiant heat transfer from combustion gases inside the tube to the inside surface of the tube. The fin design applies to tubes fabricated from high temperature metal alloys, monolithic ceramics, metal matrix composites or ceramic matrix composites.

Abstract: An air-cooled steam condensing module with an integral vent condenser has a steam header, one or more rows of condensing tubes between the steam header and a (generally lower) common condensate header. The module also has at least one row of vent condenser or dephlegmator tubes located adjacent the condensing tubes which connect the lower header to a vent header. The dephlegmator tubes may be of the same or larger diameter than the condensing tubes.

Abstract: A radiator member for efficiently releasing heat to the surrounding area. Cordierite powder and copper powder are mixed in a base material of dimethyl silicone. Near one surface of the radiator member the mixture ratio of copper powder is increased, while in the opposite surface the mixture ratio of cordierite powder is increased. By bringing the surface of the radiator member, containing a larger ratio of copper powder in contact with a heat generating element, heat from the heat generating element can be quickly conducted through the highly conductive copper powder. The cordierite powder, which is heated by heat transmitted through the copper powder from the heat generating element, converts the heat into far infrared rays, and then releases the rays to the atmosphere. Heat is thus efficiently released to the surrounding area.

Abstract: A fin tube heat exchanger for use in an air conditioner includes a plurality of fin plates spaced at regular intervals, disposed in parallel with one another. A plurality of heat exchange tubes extend through the fin plates in a direction perpendicular to planes in which the fin plates lie. A plurality of raised strips formed in a lower row have a height lower than those on the highest row, which causes water drops to readily drop along the fin plate. A plurality of embossed projection parts may be formed instead of or in addition to the raised strips.

Abstract: A method for uniformly distributing the vapor conducted from a parallel flow condenser section of an air cooled condenser into the dephlegmator cubes of a subsequently arranged countercurrent condenser includes throttling gaseous fluids present at the ends of the dephlegmator tubes on the collector side when the gaseous fluids are withdrawn from the dephlegmator tubes. In the air cooled condenser for carrying out the method, at least the predominant majority of the dephlegmator tubes has resistance elements at or near where they connect to the gas collector.

Abstract: One heat transfer tube for an absorption refrigerating machine of the present invention has a plurality of grooves formed on the circumferential surface of a tube at uniformly angular intervals to extend continuously or discontinuously in the length direction of the tube, wherein the width and/or depth of each groove gently varies in the length direction of the groove, and the height of each ridge between the mutually adjacent grooves gently varies from the axial tube center in the length direction of the ridge. Another heat transfer tube of the present invention has a large number of concave portions formed in rows on the circumferential surface of the tube at predetermined angular intervals and each having a gently down-grade surface extending in the tube length direction to gradually get closer to the axial tube center and a gently up-grade surface extending continuously from the down-grade surface in the tube length direction to gradually become more distant from the axial tube center.

Abstract: The invention relates to a method for heating a roll and a heatable roll for use in a paper machine, paper finishing machine, or equivalent. The roll is heated by a heating medium which is introduced into the roll interior through at least one of the ends of the roll. The heating medium acts upon the material of the roll mantle or the roll and is arranged to flow across the axial length of the roll. The heating medium is arranged to flow out of the roll through either one of the ends of the roll. The roll is provided with means by which the coefficient of heat transfer from the flowing heating medium to the material of the roll is increased in the flow direction of the heating medium.

Abstract: An air-conditioner of a heat pump type includes a refrigeration cycle including an interior heat exchanger, an exterior heat exchanger, a compressor, a four-way valve, and an expansion mechanism, and a non-azeotrope refrigerant composed of not less than two kinds of refrigerants is used as a working medium. A refrigerant path in each of the interior and exterior heat exchangers is divided into a group of first refrigerant passages located at a region where a proportion of the liquid-phase refrigerant is large and a group of second refrigerant passages located at a region where a proportion of the liquid-phase refrigerant is small. At least part of the group of first refrigerant passages of each of the interior and exterior heat exchangers is located at the windward side. Heat transfer tubes of the group of first refrigerant passages of each of the interior and exterior heat exchangers are smaller in flow-passage cross-sectional area than those of the corresponding group of second refrigerant passages.

Abstract: An indoor heat exchange unit and method of making same characterized by an arcuate coil shape heat exchange unit made by bending a single tubing row, planar heat exchange unit to fit within a limited space with an open inlet at one end and blocked at the other end so as to force air to flow past the coil and transfer heat through the fins and tubes of the coil in the process. Also disclosed are preferred embodiments in which an air circulation fan circulates air and where a thermostat controls the flow of heat exchange fluid through the coil as the air is passed through the arcuate coil to obtain a predetermined temperature, or the like, in the air.

Abstract: A manifold design which provides for highly efficient cooling or heating of flowing liquids using a small number of thermoelectric elements is constructed of a thermally insulting material. On exterior surface of at least two sides of the manifold, open channel are formed for use in defining a liquid flow path. On the interior of the manifold there are a plurality of internal chambers, one internal chamber for each side having an exterior channel. These internal chambers are essentially equal in size and are preferably symmetrically disposed within the manifold in alignment with the sides. The channels on the outside of the manifold and the chambers on the inside of the manifold are connected in such a way that liquid would flow in an alternating series of channel and chamber in a single liquid flow path through the manifold. The channels on the exterior of the manifold are sealed by placing a thermally conductive cover plate over each side of the manifold.

Abstract: A condenser particularly for use in automobile air conditioning system, the condenser including a pair of headers having their inner spaces divided by partitions so as to form a cooling medium flow path in a zigzag patterns including an inlet side group of paths and an outlet side group of paths, side group of paths is 30 to 60% of that of the inlet side group of paths.

Abstract: An improved cryogenic vaporizer and heat-transfer element comprising a tubular housing having outer fin members, a central passage having an upper portion substantially closed to provide a restricted flow of fluid therefrom, an intermediate portion defining a deceleation chamber, and a lower portion in which is mounted a hollow rod that substantially controls the amplitude of liquid surging within the central passage of the housing.

Abstract: An improved polymer devolatilization apparatus including a flat plate heater having a multiplicity of flat plates defining a plurality of channels, each channel having a substantially uniform height but varying width over its length, each channel including three zones:a first zone in operative communication with the polymer solution supply device, characterized by decreasing width as a function of distance from its beginning,a second zone beginning at the terminus of the first zone, characterized by at least one occurrence of a restrictive cross-sectional area, anda third zone beginning at the end of the second zone and terminating at a liquid/vapor collection and separation region operating at reduced pressure, said third zone characterized by increasing width as a function of distance from its beginning, and provided further that the ratio of maximum width of the third zone to the maximum width of the second zone is from 2:1 to 20:1.

Abstract: A multi-stage heat sink for cooling an integrated circuit module is described. The heat sink is preferably formed by an assembly of plates. A unique arrangement of slots in each plate forms different stages of air flow channels. Each stage contains a different number of slots with the number of slots increasing in successive stages. Thermal conduction of heat away from the module through fins which define the air flow channels is balanced against convective heat transfer from air flow channel walls at each stage to improve total heat transport per heat sink volume and to achieve a very low thermal resistance heat sink.

Abstract: An enhanced hydrocarbon pyrolysis reactor for the production of olefins. The reactor provides enhanced heat transfer, reduced pressure drop, and reduced energy requirements while increasing selectivity and olefin yield. The radiant section tubes of the reactor, according to the invention, are shaped to provide a continuously increasing volume per unit length from inlet to outlet of the reactor. This increase in volume may be achieved by either expanding the effective inside radius of the reactor tube and/or increasing the outside radius of the tube while increasing the inside effective radius. Alternatively, since embodiments of reactors according to the invention have internal fins, the fin size and shape may be modified to provide the required increasing volume per unit length.

Abstract: The invention relates to a method for heating a roll and a heatable roll for use in a paper machine, paper finishing machine, or equivalent. The roll is heated by a heating medium which is introduced into the roll interior through at least one of the ends of the roll. The heating medium acts upon the material of the roll mantle or the roll and is arranged to flow across the axial length of the roll. The heating medium is arranged to flow out of the roll through either one of the ends of the roll. The roll is provided with means by which the coefficient of heat transfer from the flowing heating medium to the material of the roll is increased in the flow direction of the heating medium.

Abstract: Disclosed herein is a method of firing a gas turbine with LNG which is designed to store the "cold" of LNG in an the LNG vaporizer.

Abstract: The present invention is based upon the recognition that three different zones of heat transfer conditions exist on a finned tube:1. The upstream zone (portion) of the finned tube that is initially exposed to the fluid flowing from a given location;2. Zones that include the areas on opposite sides of the finned tube where the fluid flows around the finned tube and across (through) the fins; and3. A zone that is located on the trailing edge of the finned tube (opposite from the first zone).The invention recognizes that the fluid flowing conditions (temperature, pressure and velocity) are different at each of the three zones. Because of this difference the invention is the use of a different fin configuration and/or geometry in each of the zones that are conducive to the heat transfer for the fluid flow condition encountered at each zone, thus increasing the heat transfer capability of the fins.

Abstract: A load-following vaporizer converts an inlet liquid reactant stream to an outlet vapor reactant stream. The vaporizer comprises a containment shell, a nozzle and a fin block. The fin block has a base in thermal contact a heat source, preferably a thermal fluid stream. The base has a plurality of evaporative heat transfer structures that are spaced from and generally radiate from the nozzle outlet. Each of the evaporative heat transfer structures has two principal surfaces oriented such that the extension of each of the surfaces intersects the nozzle outlet. Upon contacting the evaporative heat transfer structures, the atomized liquid reactant dispersion is vaporized to produce a vaporized reactant stream. The vaporizer rapidly responds to changes in the inlet liquid reactant flow rate to produce a corresponding change in the output vapor flow rate by minimizes the liquid inventory within the heated environment.

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: The invention relates to a temperature-gradient incubator for studying temperature dependent phenomena, such as temperature ranges for the growth of microbes, comprising a temperature-gradient plate (10) serving as a reaction substrate and heat transfer elements (17 and 18) extending along the opposite edges of the temperature-gradient plate (10) for the heating and cooling of the edges of the temperature-gradient plate (10). Each heat transfer element (17 or 18) is provided with two passages for the circulation of a heating and/or cooling medium. Gable elements (9, 16) connect the passages to each other. The gable elements (9, 16) and pipe joint elements (6, 13) are separated from the ends of heat transfer elements (17, 18) by rubber sheets (1) which serve to provide heat insulation and sealing and are provided with holes (2, 3) for the circulation of a medium.

Abstract: A plastic light conduit of cross-linked polymer material having good light transmitting characteristics, without voids or noticeable bubbles, is disclosed. Also disclosed is a method of manufacture and an apparatus, involving progressive heating of reactive monomer mixture in a tube which is submerged in a progressive reactor utilizing cold oil to maintain a cold, non-reacting zone, and hot water to create a hot zone that causes reaction, while simultaneously carrying away the excess exothermic heat of reaction.

Abstract: A side by side refrigerator has a vertical evaporator formed from an elongated tube wrapped with a ribbon of material having spine fins extending substantially perpendicular from the elongated tube. The elongated tube has elongated straight runs joined by return bent ends to define a vertically extending evaporator having a generally oval spiral or configuration. In one embodiment, the elongated straight runs are spaced from each other throughout the vertical length of the evaporator to provide a space of constant area for air flow.

Abstract: A spine fin refrigerator evaporator is formed of lower and upper sections of elongated straight runs, which have fins thereon and have their ends connected to each other by return bent ends. The lower section is formed with two rows of the elongated straight runs in an A shape to provide a passage therebetween through which air initially flows through the evaporator so that frost can be gathered without blocking air flow therethrough. The upper section has three rows of the elongated straight runs with the fins of adjacent rows overlapping each other to provide an efficient heat transfer from the refrigerant in the elongated straight runs to the air whereby the lower and upper sections combine to provide a practical and efficient evaporator. If desired, the upper and lower sections can be vertically spaced from each other to have a defrost heater disposed therebetween.

Abstract: A heat exchanger for condensing into liquid phase a vapor containing non-condensable gas components through heat exchange with a heat exchanging medium has a vessel having a vapor inlet for receiving the vapor containing the non-condensable gas components and a discharge port for the non-condensable gas components. The heat exchanger further has a tube nest disposed in the vessel and having a plurality of tubes through which the heat exchanging medium flows. The vapor containing non-condensable gas components flows towards the discharge port across the tube nest so as to be condensed into liquid phase through heat exchange with the heat exchanging medium flowing through the tubes, so that the non-condensable gas components are separated from the liquid phase and flow towards the discharge port.

Abstract: A refrigerator includes an evaporator formed from an elongated tube wrapped with a ribbon of material having spine fins extending perpendiculary from the tube. Elongated, horizontal passes of tube are arranged in vertically extending rows defining vertically extending air flow passages. Fins extending into the lower portions of the air flow passages are bent from their perpendicular relationship with the tube.

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 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: The structure consists of a composite material having a reinforcement texture and a matrix. The composition of the matrix varies practically without discontinuity, in the structure's thickness direction, from an essentially refractory material (13) in the region of the front face intended to be exposed to very high temperatures, up to a material that is essentially heat conductive (16). Cooling fluid circulation conduits (15) can be arranged within the structure at a portion where the matrix is essentially heat conductive.

Abstract: A heat exchanger includes a plurality of tube elements, and a plurality of fins which are alternately stacked together with the tube elements. A tank element is disposed on both sides of the tube elements. At least one of the tank elements is formed of brazing materials and comprises a pair of plates which are U-shaped in cross-section and form an inner space. A partition plate is positioned in the inner space and divides the inner space into a first space adjacent the tube elements and a second space separated from the tube elements by the first space. The partition plate is also provided with a penetrating hole. Each of the tube elements contain at least first and second coolant flow passages. The first coolant flow passages extend through the penetrating holes and into the second space, and the second coolant flow passages extend into the first passage.

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. The questions raised in reexamination request No. 90/003,919, filed Aug. 7, 1995, have been considered and the results thereof are reflected in this reissue patent which constitutes the reexamination certificate required by 35 U.S.C. 307 as provided in 37 CFR 1.570(e).This is a Reissue of a Patent which was the subject of a Reexamination Certificate No. B1 5,190,100, dated Aug. 30, 1994, Request No. 90/003,073, Jun. 3, 1993.

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.The question raised in reexamination request Nos. 90/003,544, filed Aug. 24, 1994, 90/003662, filed Dec. 16, 1994, 90/003796, filed Apr. 19, 1995, have been considered and the results thereof are reflected in this reissue patent which constitutes the reexamination certificate required by 35 U.S.C. as provided in 37 CFR 1.570(e).

Abstract: A condenser apparatus includes a pair of headers provided in parallel with each other; a plurality of tubular elements whose opposite ends are connected to the headers; and fins provided in the air paths between one tube and the next. Each of the headers is made of a cylindrical pipe of aluminum. At least one of the headers is internally divided by a partition into at least two groups of coolant passageways, thus enabling the flow of coolant to make at least one U-turn in the header. The partition extends into the header through a slit in the header. Each of the tubular elements is made of a flat hollow tube of aluminum. The opposite ends of the tubular elements are inserted into slits produced in the headers so that they are liquid-tightly secured.