Abstract: An inlet header of a microchannel heat exchanger is provided with a first insert disposed within the inlet header and extending substantially the length thereof, and having a plurality of openings for the flow of refrigerant into the internal confines of the inlet header and then to the channels. A second insert, disposed within the first insert, extends substantially the length of the first insert and is of increasing cross sectional area toward its downstream end such that annular cavity is formed between the first and second insert. The annular cavity of decreasing cross sectional area provides for the maintenance of a substantially constant mass flux of the refrigerant along the length of the annulus so as to thereby maintain an annular flow regime of the liquid and thereby promote uniform flow distribution to the channels.

Abstract: The invention relates to a plate heat exchanger (1) having a package of heat transfer plates (2), which are provided with through inlet ports (10) forming an inlet channel (12) through the package, and between the heat transfer plates arranged sealing means, which together with the heat transfer plates in every other plate interspace delimit a first flow passage (14) for one fluid and in each of the remaining plate interspaces delimit a second flow passage (13) for a second fluid, wherein the inlet channel (12) communicates with each first flow passage (14) by way of a first inlet passage (15), and is sealed from communication with each second flow passage by the sealing means.

Abstract: The invention relates to a heat exchanger (1), in particular, a gas cooler for a vehicle air-conditioning unit, comprising several flat tubes (2) arranged in two or more parallel rows, a collector tube (6), with one or more longitudinal separating walls (12), running along the longitudinal axis of the collector tube (6), dividing the collector tube (6) into two or more collector channels, whereby the collector tube (6) is embodied from two metal sheets (8) and openings (4) are provided in at least one of the metal sheets (8), for accommodating the ends of the flat tubes (2). Each longitudinal separating wall (12) is provided with tongue-like projections (14), arranged in grooves (16) in at least one of the metal sheets (8) and fixed on the outer side of the metal sheet (8).

Abstract: A heat exchanger used as an evaporator is configured such that two heat exchange tube groups, each composed of a plurality of heat exchange tubes, are provided between a pair of header tanks, while being separated from each other in a front-rear direction. Each of the header tanks includes two header sections. Each header tank includes a first member to which the heat exchange tubes are connected, a second member which is joined to the first member and covers the side of the first member opposite the heat exchange tubes, and a partition plate disposed between the first and second members and having partition portions which divide the interiors of the two header sections into respective upper and lower spaces. Through holes are formed in the partition portions so as to establish communication between the upper and lower spaces of the header sections.

Abstract: A heat exchanger for an ice machine has the form of a cylinder. In some embodiments, the cylinder is made from an extrusion of a metal such as an aluminum alloy. The heat exchanger includes inner and outer cylindrical walls and one or more refrigeration passages positioned between the inner and outer walls. The inner and outer walls are separated from each other by connecting structures defining the refrigeration passages. The heat exchanger can be extruded as a rectangular panel and subsequently formed into a cylindrical form. Alternatively, the heat exchanger can be extruded as a cylinder, or as an arcuate cylindrical segment in which several of such segments are subsequently joined together (as by welding) into a cylinder. Ice machines that feature ice formation on both the inner and outer walls of the cylinder are also disclosed.

Abstract: An inlet header (22) of a microchannel heat pump heat exchanger has a tube (34) disposed therein and extending substantially the length of the inlet header (22), with the tube (34) having a plurality of openings (36) therein. During cooling mode operation, refrigerant is caused to flow into an open end of the tube (34) and along its length to thereby flow from the plurality of openings (36) into the inlet header (22) prior to entering the microchannels (24) to thereby provide a uniform flow of two-phase refrigerant thereto. A bi-flow expansion device (41) placed at the inlet end of the tube (34) allows for the expansion of liquid refrigerant into the tube (34) during periods in which the heat exchanger operates as an evaporator and allows the refrigerant to flow directly from the header (22) and around the tube (34) during periods in which the heat exchanger operates as a condenser coil.

Abstract: An improved finned coil tube assembly enhances evaporative heat exchanger performance, and includes tubes, preferably serpentine tubes, in the coil assembly. The tubes have a generally elliptical cross-section with external fins formed on an outer surface of the tubes. The fins are spaced substantially 1.5 to substantially 3.5 fins per inch (2.54 cm) along the longitudinal axis of the tubes, extend substantially 23.8% to substantially 36% of the nominal tube outside diameter in height from the tubes outer surface and have a thickness of substantially 0.007 inch (0.018 cm) to substantially 0.020 inch (0.051 cm). The tubes have a center-to-center spacing generally horizontally and normal to the longitudinal axis of the tubes of substantially 109% to substantially 125% of the nominal tube outside diameter, and a generally vertical center-to-center spacing of substantially 100% to about 131% of the nominal tube outside diameter.

Abstract: A heat exchanger, such as a condenser or a gas cooler for an air-conditioning system of a motor vehicle, has at least two fin/tube cores which have, on two opposite sides of the fin/tube cores, at least two collecting tubes which can have a flow connection to one another. The collecting tubes can have connecting or junction members which each co-operate with a closure plate or separating plate in order to make the heat exchanger easier to manufacture.

Abstract: An evaporator assembly having a first header, a second header, at least two banks of evaporator tubes extending therebetween and in hydraulic communication with the first and second headers. At least one of the evaporator tube may be folded from a unitary strip clad aluminum folded having a thickness (t). The evaporator tube includes a height (h) which is measured from the bottom exterior surface to the top exterior surface, and a corner radius (rc) defined by the transition radius from the flange segments to the channel walls. The bottom wall includes a width (2w), the corrugated portion includes alternating flange segments abutting the interior surface and channel walls connecting the alternating flange segments, at least one of the alternating adjacent flange segments includes a length (a) cooperating with adjacent the channel walls to define a channel having a width (b). The evaporator tube also includes a number of ports per millimeter width (PPMW) in a range of 0.40 to 1.

Abstract: A heat exchanger includes a heat-exchange section including a first group of tubes and a second group of tubes alternating with the first group of tubes. The first and second groups of tubes are in contact with a heat-conductive medium. In one structure, a first inlet manifold at a first end of the heat-exchange section is fluidly coupled to first ends of the first group of tubes. A first outlet manifold is isolated from the first inlet manifold and is fluidly coupled to first ends of the second group of tubes. A second inlet manifold at a second end of the heat-exchange section is fluidly coupled to second ends of the second group of tubes. A second outlet manifold is isolated from the second inlet manifold and is fluidly coupled to second ends of the first group of tubes.

Abstract: An evaporator includes plural refrigerant flow members and corrugate fins disposed in corresponding air-passing clearances between the adjacent refrigerant flow members. Each refrigerant flow member includes plural flat tubes arranged in the front-rear direction. Each corrugate fin extends across all the flat tubes. A vertically extending drain portion is formed between the flat tubes adjacent each other in the front-rear direction. At each connection portion of the corrugate fin, a louver group including plural louvers inclining downward toward the front is provided to correspond to a front portion of each flat tube. At least the front-end louver of the louver group provided to correspond to the front portion of each flat tube except for the flat tube at the front end is located in the drain portion.

Abstract: A heat exchanger is provided. The heat exchanger includes a stack assembly with a plurality of plates and a plurality of frames arranged in an alternating stacked relationship with the plates along a stack direction. The stack assembly also includes a plurality of foam blocks disposed within the plurality of frames. A first and second fluid flow path extend through the stack assembly, with the first fluid flow path in thermal contact with the second fluid flow path and fluidly isolated from the second fluid flow path.

Abstract: A winding channel heat exchanger includes a heat transfer member having winding channels, a manifold, and a cover plate. The channels' winding design is defined by a non-linear flow axis that may include a plurality of short pitch and small amplitude undulations, which cause the flow to change directions, and may also or alternatively include two or more large amplitude bends that cause the flow to reverse direction. In one embodiment, the undulations have varying amplitudes to increase the heat transfer coefficient along the length of the channel. The winding channels allow a user to customize the pressure drop to promote good flow distribution, to achieve improved heat transfer uniformity, and to improve the heat transfer coefficient.

Abstract: A heat exchanger, such as a radiator, may transfer heat from a liquid and employ a first header tank, a second header tank, a plurality of tubes fluidly joining the first and second header tanks, and a baffle within one of the first or second header tanks. The baffle may be located in a header tank positioned substantially parallel or perpendicular to a surface upon which a vehicle employing the hear exchanger rests. The baffle may be a wall defining only one slot, a wall defining only one slot that is open through one side of the wall, a wall that defines a plurality of slots, or a wall that defines a plurality of holes. The heat exchanger may further employ fluidly isolated first and second tube and fin sections each defining a self-contained flow path for cooling different liquids. The baffle may slow coolant flow in a flow path.

Abstract: A heat exchanger includes tubes and an inlet manifold to direct a first fluid into the tubes at a third direction. Heat is exchanged between the first fluid and a second fluid in the tubes. The heat exchanger also includes a distributor tube located within the inlet manifold. The distributor tube includes a short tube including a plurality of first orifices that direct the first fluid into the inlet manifold at a first direction, and a long tube including a plurality of second orifices that direct the first fluid into the inlet manifold at a second direction.

Abstract: A heat exchanger 1 comprises a heat exchange core 4 composed of heat exchange tubes 12 in groups 13 in the form of two rows arranged in parallel in the direction of flow of air through the exchanger, a refrigerant inlet header 5 disposed on the upper-end side of the tubes 12 and having one row of heat exchange tubes 12 joined thereto and a refrigerant outlet header 6 disposed in the rear of the inlet header 5 on the upper-end side of the tubes 12 and having the other row of heat exchange tubes 12 joined thereto. A cap 19 for closing an opening of the inlet header 5 at one end thereof is provided with a refrigerant inlet 37. The cap 19 has a lower edge defining the inlet 37 and provided with a guide 40 upwardly slanting inwardly of the inlet header 5.

Abstract: An evaporator includes a plurality of flat heat exchange tubes arranged in a left-right direction at a spacing with the widthwise direction thereof pointing forward or rearward, and fins arranged between respective adjacent pairs of heat exchange tubes. The fins have at least front edges thereof projected forwardly outward beyond the heat exchange tubes. Assuming that the amount of projection of the fins beyond the heat exchange tubes is X mm and that the heat exchange tubes are Y mm in thickness in the left-right direction, i.e., in height, X and Y have the relationship of 0.11Y?X?1.0Y. The surfaces of the fins can be drained of condensation water efficiently.

Abstract: A heat exchange chamber includes an inlet, an outlet and a plurality of walls defining a chamber interior. The inlet receives a heat exchange medium flowing in a first flow direction in an initial line of flow. Disposed within the chamber interior is a medium directing member, having an inclined surface, which diverts the medium from the initial flow direction so that it disperses within the chamber interior. The medium exits the chamber, via the outlet, in the initial line of flow. The chambers are interconnected by tubes to form assemblies. Plural sets of chamber and tube assemblies are arranged between manifolds to provide a heat exchanger.

Abstract: The present invention heat exchanger with extruded multi-chamber manifolds includes at least two panels, with each panel having a row of at least one channel which communicates fluid. The heat exchanger includes a first manifold and a second manifold, the first manifold and the second manifold each having at least two manifold chambers. Each panel is attached to a manifold chamber of the first manifold and a manifold chamber of the second manifold, with each chamber having an inner wall and outer wall. The outer wall has a surface exposed outside the manifold chambers. There is also an opening through the outer wall including a bypass slot. The bypass slot allows fluid communication between the chambers.

Abstract: A heat exchanger for use as an evaporator includes a heat exchange core having a plurality of heat exchange tubes arranged in a left-right direction at a spacing, and a refrigerant turn tank as a lower tank disposed toward a lower end of the heat exchange core. The heat exchange tubes are inserted through respective tube insertion holes formed in the turn tank and joined to the tank. The turn tank has drain grooves each extending from a forwardly or rearwardly outer end of each of the tube insertion holes for discharging condensation water to below the turn tank therethrough. Each of the drain grooves has a bottom extending gradually downward as the bottom extends away from the tube insertion hole. the exchanger is used as the evaporator, the top surface of the turn tank can be drained of water with an improved efficiency.

Abstract: An evaporating heat exchanger (12) comprises a multitude of parallel channels (40) extending between vertical header pipes (30,32) and forming flow passages (44) from the inlet chamber (34) and to the outlet chamber (36). A venturi device (50) is positioned within the inlet chamber (34) to ensure even mass distribution of refrigerant to the flow passages (44).

Abstract: A heat exchanger includes a plurality of multi-channel heat exchange tubes extending between spaced inlet and outlet headers. Each heat exchange tube has a plurality of flow channels defining discrete flow paths extending longitudinally in parallel relationship from its inlet end to its outlet end. The inlet header has a channel for receiving a two-phase fluid from a fluid circuit and a chamber for collecting the fluid. The chamber has an inlet in flow communication with the channel and an outlet in flow communication with the plurality of fluid flow paths of the heat exchange tubes. The channel defines a relatively high turbulence flow passage that induces uniform mixing of the liquid phase refrigerant and the vapor phase fluid and reduces potential stratification of the vapor phase and the liquid phase within the fluid passing through the header.

Abstract: A radiator having a radiator fin sandwiched between and joined to a top plate and a bottom plate is provided on an insulating substrate, which has a semiconductor element arranged on one face side thereof, on the other face side thereof. The radiator fin is a corrugated fin that includes a first region that includes a joint peak portion joined to the bottom plate and has a height in an amplitude direction which is substantially equal to a distance between the top plate and the bottom plate, and a second region that includes a non-joint peak portion separated from the bottom plate by a predetermined gap and has a height in the amplitude direction which is smaller than the distance between the top plate and the bottom plate.

Abstract: The invention relates to a heat exchanger with at least one duct, which can be flowed through by flowing medium from an inlet cross-section to an outlet cross-section, has an inside and outside, and which comprises, on the inside, structural elements for increasing the transfer of heat. The invention provides that the structural elements (11) are variably arranged and/or configured in the direction of flow (P) so that the duct (10), on the inside, has a variable heat transfer that, in particular, increases in the direction of flow (P).

Abstract: The present invention relates to a heat exchanger plate, more particularly, in which a number of beads for imparting turbulence to refrigerant flowing through a channel of a plate are formed streamlined and guide beads arre formed in refrigerant distributing sections in order to reduce the pressure drop of refrigerant while realizing uniform refrigerant distribution. In the heat exchanger plate of a tube including a tank communicating with a channel, a number of first beads so arrayed in the plate that opposed sides are coupled to each other to impart turbulence to refrigerant flowing through the channel and refrigerant distributing sections provided in inlet and outlet sides of the channel and divided by at least one second bead to have a plurality of paths, the first beads are formed streamlined and satisfy an equation of 0.35?W/L?0.75, wherein W is the width and L is the length.

Abstract: A heat exchanger includes a first header and a second header and a plurality of heat exchange tubes extending therebetween. Each heat exchange tube has an inlet end opening to one of the headers and an outlet opening to the other header. Each heat exchange tube has a plurality of channels extending longitudinally in parallel relationship from its inlet end to its outlet end, each channel defining a discrete refrigerant flow path. The inlet end of each of the plurality of heat exchange tubes is positioned with the inlet opening to the channels disposed in spaced relationship with and facing an opposite inside surface of the header thereby defining a relatively narrow gap between the inlet opening to the channels and the facing opposite inside surface of the header. The gap may function either as a primary expansion device or as a secondary expansion device.

Abstract: An exhaust gas recirculation cooler may include a housing and a first wall. The housing may include an exhaust gas region, a coolant region, an exhaust gas inlet, and an exhaust gas outlet. The first wall may be fixed within the housing and may separate the exhaust gas region from the coolant region. The first wall may include a first region facing the exhaust gas region and a first tab having a fixed end coupled to the first region and a free end generally opposite the fixed end. The free end may be displaceable between first and second positions based on an operating temperature of the exhaust gas. The free end may be displaced in a direction generally perpendicular to the first region when in the second position.

Abstract: A cooler device comprising a cooling portion with at least one tubular element which has an internal flow duct for guiding a first medium between a first and a second tank. A second cooling medium in contact with an outside surface of the tubular element cools the first medium as it is led through the flow duct. A first tank receives the first medium before it is led into the cooling portion. The first tank has an outside surface provided with protruding material portions which produce an enlarged contact surface with the cooling second medium so that the first medium is subjected to a first step of cooling within the first tank.

Abstract: A heat exchanger assembly includes an outlet header extending along an outlet axis to define an outlet cavity and an inlet header defining an inlet cavity. A plurality of refrigerant tubes extends from the inlet header through the outlet header and into the outlet cavity. A collector conduit having a generally semi-circular conduit cross-section defining an arced surface and a chord surface interconnected with rounded ends is disposed in the outlet header and includes a conduit body portion and at least one conduit end portion interconnected by a conduit transition portion with the conduit body portion being offset from the conduit end portion. The conduit body portion is engaged to an interior surface of the outlet header to space the conduit body portion from the refrigerant tubes and the conduit end portion is coaxial with the outlet header axis to provide a central outlet for the refrigerant vapor.

Abstract: The present invention relates to a PTC heating element with at least one PTC resistance element which is arranged between two electrically conductive plates in a housing opening of a housing and, with at least one of the electrically conductive plates as an intermediate layer, which is pressed with an initial tension against a heat-emitting element which is held at the housing. With the present invention, a PTC heating element of the type mentioned at the beginning that can be manufactured easily and economically is to be specified. To solve this problem, the present invention further develops the PTC heating element mentioned at the beginning in such a way that attachment tabs arranged on the edge of the housing opening protrude beyond the housing opening and in such a way that the heat-emitting element has tab cuts, behind which the tabs engage.

Abstract: A modular multi-channel tube heat exchanger includes a plurality of aluminum heat exchanger modules selectively connected in fluid communication by interconnecting tubing. Each heat exchanger module includes an aluminum inlet header, an aluminum outlet header and a plurality of aluminum heat exchange tubes extending longitudinally therebetween. Each of the plurality of heat exchange tubes may have a plurality of flow paths extending longitudinally in parallel relationship from an inlet end thereof in fluid communication with the inlet header to an outlet end thereof in fluid communication with the outlet header.

Abstract: A heat exchanger includes a heat exchanger core section, a refrigerant inlet header section, a refrigerant outlet header section, a refrigerant inflow intermediate header section and a refrigerant outflow intermediate header section. A flow-dividing control wall having a plurality of refrigerant passage holes and vertically dividing the interior of the second intermediate header section into two spaces is provided within the second intermediate header section. A communication is established between the first intermediate header section and the lower space of the second intermediate header section at one end. A guide portion is provided at a refrigerant inflow end portion of the second intermediate header section so as to guide the refrigerant flowing into the lower space of the second intermediate header section such that the refrigerant flows toward the flow-dividing control wall; i.e., toward the upper side.

Abstract: The invention relates to a heat exchanger for motor vehicles, especially for utility vehicles. The heat exchanger can include a heat exchanger unit that includes tubes having tube ends and ribs disposed between the tubes, and collecting tanks disposed on both ends and produced by internal high pressure forming for introducing and discharging a medium. The collecting tanks can include bottoms with openings for receiving the tube ends, covers, and inlet and outlet tubes.

Abstract: In a parallel flow heat exchanger having an inlet manifold connected to an outlet manifold by a plurality of parallel channels, a spirally shaped insert is disposed within the refrigerant flow path in the inlet manifold such that a swirling motion is imparted to the refrigerant flow in the manifold so as to cause a more uniform distribution of refrigerant to the individual channels. Various embodiments of the spirally shaped inserts are provided, including inserts designed for the internal flow of refrigerant therethrough and/or the external flow of refrigerant thereover.

Abstract: A countercurrent chromatography apparatus includes a plurality of plates, at least one plate (16) having first and second interleaved spiral flow channels (52, 54, 56, 58) therein. Each spiral flow channels (52, 54, 56, 58) has a first end (I1, I2, I3, I4) near the central axis and a second ends (O1, O2, O3, O4) near the periphery. The outlet of the first channel (O1) is connected to the inlet of the second channel (I2) by a connecting channel (72). Septa may be provided between the plates to connect the spiral channels of one plate to the spiral channels of the next plate.

Abstract: A heat exchanger comprising a heat exchange core composed of tube groups in the form of rows arranged in the direction of flow of air through the exchanger, each of the tube groups including a plurality of heat exchange tubes arranged at a spacing. A refrigerant inlet header and a refrigerant outlet header are positioned at the upper end of the core and having respective groups of heat exchange tubes joined thereto. A refrigerant turn tank is disposed at the lower end of the core. The turn tank has its interior divided by a partition wall into a refrigerant inflow header and a refrigerant outflow header. The heat exchange tubes have lower end portions inserted in the headers and are joined to the headers. Refrigerant passing holes are formed in the partition wall. The heat exchange tubes have their lower ends positioned below the lower ends of the holes.

Abstract: A micro-channel heat exchanger includes an inlet manifold fluidly connected with an outlet manifold by a plurality of generally parallel tubes, further defining a plurality of generally parallel micro-channels therethrough. Refrigerant is introduced to the heat exchanger through a distributor tube disposed within the inlet manifold. The distributor tube includes a plurality of non-circular openings disposed along the length thereof which act as an outlet for refrigerant flow into the inlet manifold and eventually into and through the tubes and micro-channels. The openings are preferably slots arranged along the length of the distributor tube at an angle relative to the longitudinal direction of the distributor tube and oriented within the inlet manifold for a general direction of refrigerant flow at an angle relative to the general direction of refrigerant flow through the tubes. Alternative shapes for the openings are also considered.

Abstract: A heat exchanger (100a) includes a plurality of tubes (4), an entrance header (1) for distributing a refrigerant to the tubes (4), and an exit header (2) for collecting the refrigerant from the tubes (4). The entrance header (1) includes a circulating conduit (10) capable of circulating at least part of the refrigerant that has flowed into the entrance header (1), and the plurality of tubes (4) are fluidly connected to the outward channel (10a) of the circulating conduit (10). The entrance header (1) also includes an ejector 11 that uses the refrigerant flowing into the entrance header to draw and mix at least part of the refrigerant that has flowed into the entrance header and spray out the mixed refrigerant. The entrance header (1) can supply refrigerant more uniformly to the tubes (4) connected to the circulating conduit (10).

Abstract: A heat exchanger has tubes, an inlet tank and an outlet tank. The inlet tank and the outlet tank are coupled to ends of the tubes. The inlet tank and the outlet tank have an inlet port and an outlet port, respectively, on ends thereof. The heat exchanger further has a cover member disposed in at least one of the inlet tank and the outlet tank. The cover member partly covers openings of the ends of predetermined tubes of the tubes, the predetermined tubes being closer to at least one of the inlet port and the outlet port.

Abstract: A heat exchanger includes a heat transfer surface to transfer heat to or from a working fluid, a manifold region with a plurality of internal walls defining a plurality of inlet and outlet passages, and a heat transfer region disposed between the manifold region and the heat transfer surface. The internal walls are substantially normal to the heat transfer surface for directing working fluid in a normal direction, and include a plurality of alternating inflow and outflow portions in fluid communication with corresponding inlet passages and outlet passages. Adjacent inflow and outflow portions are in fluid communication with each other. A heat transfer structure is disposed in each of the plurality of inflow portions and extend between the internal walls of the inflow portion, the heat transfer structure being in thermal communication with the heat transfer surface to transfer heat between the working fluid and the heat transfer surface.

Abstract: A charge air cooler comprising at least one tubular element with an internal flow duct for leading compressed air between an inlet aperture and an outlet aperture. A medium at a lower temperature than the compressed air is caused to flow in contact with an outside surface of the tubular element cooling the compressed air in the tubular element when the air is led through the flow duct. A movable control element is arranged close to the inlet aperture or the outlet aperture of the flow duct. A control for the control element provides a variable flow of compressed air through the flow duct as the movable control element is placed in various positions.

Abstract: A heat exchanger includes left and right header tanks disposed in parallel; top and bottom side plates that couple respectively both ends of the pair of the header tanks; a first plurality of tubes connected between the pair of the header tanks at both ends that are disposed in a region nearer the bottom side plate as a condenser; and a second plurality of tubes that are disposed in a region nearer the top side plate as an oil cooler. Each tube in the second tubes has a cross-sectional shape identical to that of each tube in the first tubes and the top side plate is formed to have a squared U-shaped cross section so that a return pipe communicating with the second tubes can be disposed along a groove having the squared U-shaped cross section of the top side plate.

Abstract: A heat exchanger assembly includes a first single-piece manifold and a second single-piece manifold spaced from and parallel to the first single-piece manifold. Each of the first and second single-piece manifolds has a tubular wall defining a flow path. A plurality of flow tubes extend in parallel between the first and second single-piece manifolds and are in fluid communication with the flow paths. An insert having a distribution surface is slidably disposed in the flow path of the first single-piece manifold to establish a distribution chamber within the first single-piece manifold. A series of orifices defined in the distribution surface of the insert are in fluid communication with the flow path and the distribution chamber for uniformly distributing a heat exchange fluid between the flow path and the flow tubes.

Abstract: A refrigerant distributor for a heat exchanger is disclosed. The refrigerant distributor comprises: a pipe for distributing a refrigerant, the pipe having a channel therein in which the refrigerant flows. The channel has at least one portion having reduced cross-section area. With the above configuration, the distributor relieves the layering of refrigerant flowing in a distributing pipe and mixes the vapor-liquid refrigerant relatively uniformly.

Abstract: In a parallel flow heat exchanger having an inlet manifold connected to an outlet manifold by a plurality of parallel channels, a spirally shaped insert is disposed within the refrigerant flow path in the inlet manifold such that a swirling motion is imparted to the refrigerant flow in the manifold so as to cause a more uniform distribution of refrigerant to the individual channels. Various embodiments of the spirally shaped inserts are provided, including inserts designed for the internal flow of refrigerant therethrough and/or the external flow of refrigerant thereover.

Abstract: In a parallel flow heat exchanger having an inlet manifold connected to an outlet manifold by a plurality of parallel channels, a spirally shaped insert is disposed within the refrigerant flow path in the inlet manifold such that a swirling motion is imparted to the refrigerant flow in the manifold so as to cause a more uniform distribution of refrigerant to the individual channels. Various embodiments of the spirally shaped inserts are provided, including inserts designed for the internal flow of refrigerant therethrough and/or the external flow of refrigerant thereover.

Abstract: An evaporator includes a refrigerant inlet header section having a refrigerant inlet at a first end portion thereof and plural heat exchange tubes disposed at predetermined intervals in the longitudinal direction of the refrigerant inlet header section and connected at respective first end portions thereof to the refrigerant inlet header section. A flow-dividing control wall divides the refrigerant inlet header section interior into an upper space, into which a refrigerant flows through the refrigerant inlet, and a lower space, with which the heat exchange tubes communicate. A communication hole in the flow-dividing control wall at an end portion opposite the first end portion establishes communication between the spaces therethrough. A flow-division-adjusting hole communicating with the lower space formed at the first end portion of the refrigerant inlet header section allows the refrigerant to flow into the lower space therethrough without passing through the upper space.

Abstract: A heat exchanger has header tanks each including a header forming plate, a tube connecting plate, and an intermediate plate interposed between the two plates, the plates being arranged in superposed layers and brazed to one another. Each of the plates is made from a metal plate by press work. The header forming plate has an outward bulging portion. The tube connecting plate has tube insertion holes. The intermediate plate has communication holes causing tube insertion holes to communicate with the interior of each outward bulging portion therethrough. Heat exchange tubes have opposite ends placed into the respective insertion holes and brazed to the respective tube connecting plates. The heat exchanger including such header tanks is reduced in the number of components, can be fabricated with a high work efficiency, and exhibits improved heat exchange performance.

Abstract: The present invention relates to a multitubular catalytic gas-phase reaction apparatus, comprising a plurality of reaction tubes arranged in parallel, a baffle capable of changing the direction of movement of a heat medium introduced into a reactor shell to a direction perpendicular to the longitudinal direction of the reaction tubes, a space that is disposed in a region including a part of a section where the heat medium flows in the direction of the face of the baffle and does not have the reaction tubes arranged therein, and flow-adjusting rods, disposed in between the space and the reaction tubes, having the same longitudinal direction as that of the reaction tubes.

Abstract: A heat exchanger (10) includes at least one header box (12, 14) delimiting a first chamber (42) for a first fluid (F1) and a second chamber (44) for a second fluid (F2), as well as a beam of tubes (16) ending into the header box (12, 14) and comprising at least one first tube (18) communicating with the first chamber (42) of the collecting box (12, 14) and at least one second tube (20) communicating with the second chamber (44) of the collecting box, the first tube (18) being coupled with the second tube (20) to constitute a module (22) allowing a heat transfer between the first tube (18) and the second tube (20). The ends (32) of the first tube (18) is off-set with respect to the ends (30) of the first tube (18), so that such ends (30, 32) can be received in an alternate way in insertion holes (34) of the header box (2, 14), said holes (34) being spaced with a constant step (P).