Abstract: The invention relates to a plate heat exchanger, composed of trough-shaped heat exchanger plates which are stacked one in the other and whose edges bear against one another. The plates can have flow ducts, located between the heat exchanger plates for a cooling fluid and for another fluid. The flow ducts are fitted with inserts in the form of turbulator plates. The heat exchanger can include at least four inlet and outlet openings in the corners of the heat exchanger plates which form two vertical ducts for the cooling fluid and two vertical ducts for the other fluid in the stack. The inserts in the flow ducts for the cooling fluid are embodied in one part or a plurality of parts. The flow ducts for the cooling fluid are equipped, in the regions around the openings, with plate-like inserts which have guide ducts with a width, and are provided with the turbulator plate in a central region between the plate-like inserts.

Abstract: An evaporator 1 comprises a heat exchange core 4 having heat exchange tubes 12 in groups 13, a refrigerant inlet header 5 and a refrigerant outlet header 6 which are arranged toward one end of each of the heat exchange tubes 12, and a refrigerant inflow header 9 and a refrigerant outflow header 11 which are arranged toward the other end of each heat exchange tube 12. The outflow header 11 has its interior divided by a flow dividing control wall 52 into two spaces 11a, 11b arranged one above the other. The inflow header 9 and the lower space 11b of the outflow header 11 are held in communication each at one end thereof. The control wall 52 has a plurality of refrigerant passing holes 53 arranged at a spacing longitudinally thereof.

Abstract: A heat exchanger, including first and second collecting tanks with an inlet, an outlet, and an opening through a wall of the first tank. At least one row of tubes extends between the collecting tanks, and the tubes and tanks carry a first medium and a second medium flows through the spaces between the tubes. A first partition divides the first collecting tank and defines an opening therethrough, and a second partition divides the second collecting tank, with the first and second partitions defining separate loops for the first medium when the first partition opening is closed. A discharge device selectively either simultaneously opens both the first collecting tank opening and the first partition opening for emptying or simultaneously closes both the first collecting tank opening and the first partition opening for operation.

Abstract: An integrated hybrid heat exchanger may include a first radiator and a second radiator disposed up and down in parallel, a first radiator tank connected to both first end portions of the first and second radiators in common, a first baffle installed in the first radiator tank and separating an inner space of the first radiator tank into an upper space and a lower space, wherein the upper and lower spaces of the first radiator tank include a coolant inlet respectively and a first air bypass member having a passage therein, the first air bypass member installed on the first baffle and extending upwards with a predetermined length and configured to remove bubbles collected in the lower space of the first radiator tank through the passage of the first air bypass member by pressure difference between the upper and lower spaces of the first radiator tank.

Abstract: A heat exchanger includes a heat exchange core including a plurality of heat exchange tubes, a refrigerant inlet header and a refrigerant outlet header arranged toward one end of each heat exchange tube, and a refrigerant inflow header and a refrigerant outflow header arranged toward the other end of each heat exchange tube. The outlet header has an interior divided into two spaces by a flow dividing resistance plate, and some of the heat exchange tubes are joined to the outlet header so as to communicate with the space. The resistance plate has a plurality of refrigerant passing holes formed therein that are different in shape and/or size. The outlet header is provided on the outer surface thereof with identification marks for discriminating the positions of the refrigerant passing holes and representing the shapes and/or sizes of the holes.

Abstract: A multi-pass heat exchanger having a return manifold with a partition, a front wall, and a rear wall is provided. The partition separates the return manifold into a collection chamber and a distribution chamber. The front and rear walls define a fluid channel. The front wall has a plurality of perforations placing the fluid channel in separate fluid communication with the collection chamber and the distribution chamber.

Abstract: A mini-channel heat exchanger or a micro-channel heat exchanger includes an insert (140, 240, 340, 440, 540, 640, 4, 940, 1040) having a volume. The insert is within a gap between a plurality of tubes (130, 230, 330, 430, 530, 630, 1, 930, 1030) of the mini-channel heat exchanger or the micro-channel heat exchanger and a manifold inner wall of a manifold (120, 220, 320, 420, 520, 620, 2, 920, 1020).

Abstract: A heat transfer plate for a plate heat exchanger has a first port portion (A) with at least one port (1, 4) for each of two fluids and a second port portion (B) with at least one port (2, 3) for each of the fluids, and a heat transfer portion which is located between the port portions (A, B). The ports (1, 4) in the first port portion (A) are located along a first geometric line (LA; LA1-LA2) which is essentially parallel to a longitudinal direction (L) of the plate, while the ports (2, 3) in the second port portion (B) are located along a second geometric line (LB; LB1-LB2) which is essentially parallel to the longitudinal direction (L) of the plate. A flow limiter (5) is arranged at least in the first port portion (A) adjacent to at least one of the ports which is located nearest the second port portion (B). The second port portion (B) has a corresponding flow limiter (6).

Abstract: A plate heat exchanger includes a heat exchanger block having a plurality of heat exchange passages. On the heat exchanger block, a header is mounted that extends over at least one part of one side of the heat exchanger block and establishes a flow connection between the heat exchange passages. The plate heat exchanger is provided with a fluid connection, which is formed by the header-side end of a pipeline. The fluid connection is essentially perpendicular to the side of the heat exchanger block over which the header extends. Within the pipeline directly in front of the header, there is a flow guide.

Abstract: A device, including a heat exchanger plate and a plate package (2) of heat exchanger plates (1) which are provided beside each other to form a plate interspace between adjacent plates. The plate interspaces form, in an alternating order, first passages (3) for a first medium and second passages (4) for a second medium which cools the first medium. Each heat exchanger plate has at least two portholes forming a first inlet port channel and a first outlet port channel (7), which extend through the plate package to a first inlet and a first outlet, respectively, for the first medium to and from the first passages (3). The first outlet forms a gas outlet (31) for discharging a gaseous portion of the first medium and a liquid outlet (32) for discharge of liquid of the first medium. The liquid outlet (32) is separated from the gas outlet (31) to permit separate discharge of the liquid and gaseous portions.

Abstract: An air-to-air cooling assembly is disclosed. The air-to-air cooling assembly includes an inlet tank having an inlet configured to receive an air flow, and a wall forming a space within the inlet tank. The air-to-air cooling assembly also includes a perforated plate disposed adjacent the inlet of the tank and arranged substantially perpendicular to the air flow. The air-to-air cooling assembly further includes a plurality of pressure balancing openings at predetermined locations on the wall and configured to direct air into and out of the space.

Abstract: An expansion device for a heat exchanger having a manifold and a plurality of mini- and or micro-channels. The expansion device has an outer element having a plurality of orifices therethrough that is received in the manifold, and an inner element telescopically received in the outer element having at least one orifice therethrough and being in fluid communication with the plurality of orifices. Fluid passing through the at least one orifice and through the plurality of orifices is expanded and reduced in pressure prior to entering the manifold.

Abstract: In a heat exchanger with a receiver tank, a coupling member and an adapter member constitute a connecting member that connects the receiver tank and the heat exchanger, where the connecting member has header connecting portions respectively connected with a concentrating part and a supercooling part of one of headers and the adapter member is connected with the connecting member and the receiver tank and is detachably attached to the receiver tank. The coupling member is assembled with a first divided member and a second divided member, where the first divided member is formed with header connecting portions to be connected with the second divided member.

Abstract: A unit for a refrigerant cycle device includes an ejector that has a nozzle part which decompresses refrigerant, and a refrigerant suction port from which refrigerant is drawn by a high-speed refrigerant flow jetted from the nozzle part, a first evaporator connected to the outlet of the ejector, and a second evaporator connected to the refrigerant suction port of the ejector. One of the first evaporator and the second evaporator has a tank structure that includes a tank for distributing refrigerant into or for collecting the refrigerant from refrigerant passages of a heat exchanging part. The tank has therein a first space through which the refrigerant discharged from the outlet of the ejector flows into a heat exchanging part of the first evaporator, and a second space through which the refrigerant to be drawn into the refrigerant suction port flows into a heat exchanging part of the second evaporator.

Abstract: The invention relates to a heat exchanger comprising tubes (2, 3) that can be flown through along a number of hydraulically parallel flow paths (2c, 2d) that are comprised of sections.

Abstract: The invention relates to a heat exchanger, particularly a radiator for a heating or air conditioning unit in motor vehicles, which cools a coolant. Said heat exchanger (1) is penetrated by air, comprises collector pipes (S1, S2, S2, S4) and several essentially horizontally disposed pipes (5), and is divided into several partial blocks (T1, T2, T3, T4). The surfaces of the inventive partial blocks are selected according to the dimensions of structural space-related zones having different air temperatures inside the assembly space of the heat exchanger, the partial block which is first penetrated by the coolant being arranged within a structural space-related zone having a higher air temperature, preferably within the zone having the highest air temperature.

Abstract: The present invention relates to a heat exchanger for carbon dioxide, in which a tank having a number of domes is coupled with a header and a connection member having a connection flow channel is interposed between the header and the tank, thereby easily changing a refrigerant flow channel, reducing the volume of a header tank, and improving productivity, pressure resistance and durability.

Abstract: This invention relates in general to air exchange systems and, in particular, to an improved energy recovery ventilator, a cross flow plate core associated therewith and a method of conditioning air for a building. In one aspect, the invention provides a cross flow plate core comprising: a left hand wafer comprising a left hand spacer with a first of a plurality of membranes bonded thereto, the left hand spacer comprising a plurality of parallel curvilinear rails which form channels for receiving a first stream of air; and a right hand wafer comprising a right hand spacer with a second of the plurality of membranes bonded thereto, the right hand spacer comprising a plurality of parallel curvilinear rails which form channels for receiving a second stream of air, wherein the left hand spacer of the left hand wafer is bonded to the top of the membrane of the right hand wafer.

Abstract: A syngas reforming reactor has a shell-and-tube configuration wherein the shell-side fluid flow path through the tube bundle has a longitudinal configuration. The reactor can include a shell-side inlet fluid distributor plate below the lower end of the tube bundle, and a flow sleeve in an enlarged-diameter discharge annulus at an upper end adjacent the tube sheet to prevent short-circuiting of the shell-side fluid into the shell-side fluid outlet. The tube bundle can include a plurality of ring baffles and lattice baffles. The longitudinal flow configuration can provide a lower shell-side pressure drop and lower cost compared to a conventional cross-flow reforming exchanger.

Abstract: An evaporator has a header tank including a header forming plate with outward bulging portions, a tube connecting plate, and an intermediate plate. Tube insertion holes are formed in the tube connecting plate. Communication holes formed in the intermediate plate cause the tube insertion holes to communicate with the interior of the corresponding outward bulging portion therethrough. At least one of the outward bulging portions allows a refrigerant to flow therethrough longitudinally. All the communication holes in communication with the refrigerant passing bulging portion are held in communication by communication portions for the communication holes, the communication portions providing a refrigerant passageway. The refrigerant passageway is altered in cross sectional area along the longitudinal direction thereof by adjusting the width of the communication portions.

Abstract: A device which is used to replace heat, for a motor vehicle, includes at least one first collecting and/or distribution device for at least one fluidic medium. The collecting and/or distribution device is fluidically connected to a plurality of through-flow devices, through which the medium flows at least in parts. The collecting and/or distribution device includes at least one base device, a covering device and a separating device, which divides the collecting and/or distribution device into at least two partial areas. The base device includes at least one projection which protrudes in an inward manner from a predetermined plane of the base device in relation to the collecting and/or distribution device and at least one section of the separating device is in contact with at least one lateral side of the projection, and at least one section of the plane of the base device is in indirect contact.

Abstract: A heat exchanger system is described and which includes a metal tubular heat exchanger; a fluid distributor conduit fabricated from a metal dissimilar to that of the heat exchanger, and wherein the fluid distributor conduit is connected in fluid flowing relation relative to the metal tubular heat exchanger; and a fluid distributor made of a metal that is similar to that of the fluid distributor conduit, and which is connected in fluid flowing relation relative to the fluid distributor.

Abstract: A heat exchanger assembly having an inlet header, an outlet header spaced apart from and substantially parallel the inlet header, and a plurality of refrigerant tubes each extending between and in hydraulic communication with the inlet header and outlet header. Contained within the outlet header is a refrigerant collector conduit adapted to provide a predetermined pressure drop (?P) and having a cross-section area Acollector. The refrigerant collector includes a plurality of orifices having a cumulative orifice area (nAorifice) that are substantially equally spaced along the refrigerant collector. The collector conduit is in fluid communication with the outlet header for transferring the vapor phase of a two refrigerant. The collector conduit cross sectional area (Acollector) and cumulative orifice area (nAorifice) is described by the following equation: ? ? ? p = m dot 2 ? ? [ 467.892 ? ( 1 A collector 2 - 1 n 2 ? A orifice 2 ) + 51.

Abstract: A device for coordination of installation components of a heating or cooling system. The device includes a number of distributors (3) with functional components (5). The distributors are mounted in a profile (4), which is fixed in a complete installation unit (1). The profile (4) provides the distributors with a rotational mounting position and facilitates subsequent servicing of the installation components or installation of additional distributors to supplement the installation unit.

Abstract: A submersible heat-exchanging apparatus comprises a cylindrical heat-exchange component configured with one end for sealingly engaging a terminal plug and the other end for sealingly engaging and communicating with a coupling manifold having opposed inflow and outflow ports. A flow-directing elongate insert is provided with one end configured to engage the coupling manifold interposed the inflow and outflow ports, and the other end provided with an aperture and configured for abutting the terminal plug. The flow-directing elongate insert is configured to slidingly contact and cooperate with the inner walls of the heat-conductive conduit thereby partitioning the heat-conductive conduit into two opposed fluid transmission channels wherein one channel communicates with the inlet port and the other channel communicates with the outlet port.

Abstract: The invention relates to a heat exchanger, especially a gas cooler for CO2, embodied as a cooling agent. The heat exchanger comprises at least one two-part collector unit made of a base and a cover. Said collector unit consists of flat pipes and at least two longitudinal channels with an essentially circular cross-section. The ends of the flat pipes and the base comprise openings for receiving the ends of the pipes. The base, cover and flat pipes are soldered together.

Abstract: The present invention is related to a device for influencing the flow in the region of a tube support plate (700, 800) of a tube bundle heat exchanger (100), for the food and beverage industry in particular. A displacement body (10, 11) is provided with a shank part (10c, 11c) which extends in the direction of its axis of symmetry (S) and which, at its end distal to the displacement body (10, 11) is fixedly connected to a connection bend (1000) or connection fitting (1100; 1200) which follows the exchanger flange (500; 1100e) or the connecting piece (800d).

Abstract: A refrigerant evaporator includes an upstream tank portion for distributing refrigerant into all laminated tubes of a core portion. The upstream tank portion includes a first distribution passage for distributing the refrigerant into the tubes in a direction parallel to a tank longitudinal direction, a second distribution passage for distributing the refrigerant from the first distribution passage into the tubes in a tank width direction, and a communication passage through which the refrigerant from the first distribution passage is supplied to the second distribution passage after flowing in the tank longitudinal direction.

Abstract: A heat exchanger includes an inlet header, an outlet header and a plurality of flat, multi-channel heat exchange tubes extending therebetween. A longitudinally extending member divides the interior of the header into a first chamber on one side thereof for receiving a fluid and a second chamber on the other side thereof. A plurality of multi-channel heat exchange tubes extend between the headers with the respective inlet end of each heat exchange tube passing into the second chamber of the inlet header. Fluid passes through a series of longitudinally spaced openings in the longitudinally extending member for distribution to the inlets to the channels of the multi-channel heat exchange tubes. The fluid may undergo expansion as it passes through the openings.

Abstract: A heat exchanger 1 includes at least a plurality of tubes 2 and an upper tank 4 communicating with an upper end portion of a tube group formed by the tubes 2 so as to distribute coolant along the up/down direction. The coolant flows in through an inflow port 9 located at the upper tank 4 in the heat exchanger 1. An open-top coolant intake guide passage 25 is disposed at the inflow port 9 and the coolant intake guide passage 25 is thus inserted at the upper tank 4. With this configuration, coolant flowing at a very low flow rate has improved distribution, and uniformity in the output air temperature is achieved, while ensuring that the structure does not create excessive resistance against the coolant flow at a high flow rate.

Abstract: A fluid flow diverter is provided in a standard rectangular header of a keel cooler for optimizing the coolant flow towards both the interior tubes and also towards the exterior tubes of the keel cooler. The improvement enhances the internal coolant flow and subsequent heat transfer efficiency similar to what has been realized with a non-rectangular header, for example, a header with a beveled wall.

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 heat exchanger element has a row of multiple channel flat pipes (3) that are mutually spaced apart and have ends connected in a fluid-tight manner to a tubular connector container (6) and to a tubular distributor (1). The ends of the multiple channel flat pipes (3) are separated into multiple zones (3?, 3?) shaped in such a way that each zone (3?, 3?) is parallel at its end on the side of the connection to the main plane of the multiple channel flat pipes (3), and the zones (3?, 3?) overlap at least partially in the direction of the longitudinal axis of the collector container (6) and distributor (1).

Abstract: An improved heat exchanger for an automotive vehicle, comprising at least one end tank; and at least two heat exchangers including a plurality of spaced apart metal tubes with fins between the spaced tubes. The heat exchangers are preferentially disposed so that their respective tubes and fins are generally co-planar with each other and are connected to the end tank. In preferred embodiments, the heat exchanger may include a radiator element.

Abstract: A heat exchanger includes a plurality of flat, multi-channel heat exchange tubes extending between spaced headers. Each heat exchange tube has an inlet end in fluid flow communication with one of the headers and an outlet opening to the other header. Each heat exchange tube has a plurality of flow channels extending longitudinally in parallel relationship from its inlet end to its outlet end. A plurality of connectors are positioned between the inlet header and the heat transfer tubes to define a flow path providing fluid flow communication between the inlet header and the inlet ends of the heat exchange tubes. Two or more flow restriction ports are arranged in the series in the flow path through each connector whereby fluid flowing from the inlet header to the flow channels of the heat exchange tube associated therewith undergoes an expansion as the fluid passes through each flow restriction port.

Abstract: The present invention relates to a heat exchanger, in which inlet and outlet side heat exchange parts are communicated with each other and have the same refrigerant flowing direction by communicating pairs of cups with each other which are located at a predetermined area of the center of the heat exchanger, thereby being easily reduced in size, providing uniform surface temperature distribution and improving heat exchange efficiency by reducing the preponderance and the pressure drop rate of refrigerant and inlet and outlet pipes being easily arranged forward.

Abstract: There is disclosed a heat exchanger for transferring heat between at least two fluids and a method for forming the heat exchanger. The heat exchanger preferably includes one or more end tanks, one or more inlets and outlets, one or more tubes, one or more fins, and one or more improved baffle combinations including at least one single piece double baffle. The improved single piece double baffles act as part of a baffle system, with advantages over multiple-piece only double baffle systems due to being assembled in one piece.

Abstract: A bed of particulate material 6 is supported by an air distribution bottom 5. Under the distribution bottom 5 exist one or more compartments 7, which each being supplied with cooling air from a fan installation 8. The distribution bottom 5 is sectionalised in a number of smaller areas 9. Each smaller distribution area 9 is connected to the compartment 7 by ducts 10, 11 and 12. The one duct 10 does have a fixed orifice area. The ducts 11 and 12 do have floaters 13A/13B end stop 14A/14B and bottom support 15A/15B. It is hereby obtained that the total pressure loss across the air distribution bottom can be reduced, and so that the flow of the treatment air through the material bed is distributed in a desirable manner across the entire air distribution bottom regardless of the composition of the material bed and the distribution thereon, and optimal heat exchange efficiency is obtained.

Abstract: The structure of header-tank for a heat exchanger comprises a plurality of tubes which are arranged in a row along an air-blowing direction to be spaced apart from each other at a certain intervals; fins which are interposed between the tubes so as to increase a heat exchange surface area with respect to air flowing between the tubes; and a pair of header-tanks which comprises a header having a tube insertion hole and a tank coupled with the header and in which heat exchange medium is flowed, wherein the header is bent at a surface, in which the tube insertion hole is formed, so as to form a bending portion in a height direction, and the bending portion is formed with a plurality of taps 5, and the tank is formed with a coupling portion coupled to the bending portion of the header, and a coupling groove which is recessed inside tank at the same position as the tap along a longitudinal direction and in which the tap is bent and inserted.

Abstract: A radiator and oil cooler combination for an internal combustion engine includes a concentric type oil cooler in the radiator inlet or outlet tank. A baffle directs coolant flow around the oil cooler. In one embodiment, the baffle is between an inner surface of the outlet radiator tank housing and the outer wall of the oil cooler forming a barrier substantially filling the space therebetween. The baffle is located away from the ends of the oil cooler, intermediate the length thereof, and intermediate the length of the outlet radiator tank containing the tube openings. In another embodiment, the baffle is between and spaced from the oil cooler and the radiator core tube openings. The baffle extends along at least a portion of the length of the outlet radiator tank containing the tube openings and overlaps at least a portion of the length of the oil cooler. In a further embodiment, the baffle is located in the radiator tank near one end of the oil cooler and has an opening spaced from the oil cooler outer wall.

Abstract: Apparatus and method for cooling heated fluids, such as exhaust gases, flowing through a heat exchanger comprising one or more exhaust plenums and one or more coolant plenums, and providing increased coolant velocity in that portion of the coolant plenums contacting the inlet portion of the exhaust plenums. Local increased coolant velocity is provided by any means, including decreasing the area-in-flow of the coolant plenums wherein increased velocity is desired, shaping or baffling either or both inlet or outlet coolant tanks in fluidic contact with coolant plenums wherein increased velocity is desired, or a combination thereof.

Abstract: A heat exchanger is provided with a header tank having therein a circulation portion in which fluid flows, and multiple tubes which are stacked in a longitudinal direction of the header tank. The circulation portion is communicated with interiors of the tubes, and partitioned into an inlet side passage and other passages. An inflow port member is arranged at a longitudinal-direction end of the inlet side passage, and provided with multiple openings for causing at least a mainstream flow and a substream flow of fluid introduced toward the tubes. The mainstream flow is substantially evenly flow-divided by the substream flow.

Abstract: A method of assembling a radiant cooler is provided. The method includes providing a vessel shell that includes a gas flow passage defined therein that extends generally axially through the vessel shell, coupling a plurality of cooling tubes and a plurality of downcomers together to form a tube cage wherein at least one of the plurality of cooling tubes is positioned circumferentially between a pair of circumferentially-adjacent spaced-apart downcomers, and orienting the tube cage within the vessel shell such that the tube cage is in flow communication with the flow passage.

Abstract: A vehicle HVAC system comprises an evaporator, a heater core, an air mixing door between the evaporator and the heater core, the air mixing door being configured to direct a portion of an airflow to either bypass or pass over the heater, and a baffle. The baffle is configured to gradually change the area available to a portion of the airflow as the air mixing door is moved.

Abstract: A heat exchanger assembly includes a first and second manifold. Each of the manifolds includes a tubular wall and a pair of manifold ends spaced from each other defining a flow path. A plurality of flow tubes extend between the manifolds and are in fluid communication with the flow paths. An insert is slidably disposed in the flow path of the first manifold. The insert divides the flow path into a plurality of chambers. The chambers and the flow tubes cooperate to establish a plurality of flow passes. The flow passes are for directing a heat exchange fluid through the heat exchanger assembly. The chambers are useful for orienting and connecting plumbing connections at various locations along the manifolds.

Abstract: Heating, ventilation, air conditioning, and refrigeration (HVAC&R) systems and multi-slab heat exchangers are provided that include fluid connections for transmitting fluid between groups of tubes. The fluid connections may include generally tubular members fluidly connected to manifold sections. The fluid connections also may include partitioned manifolds containing tubes of different heights. Multichannel tubes are also provided that include a bent section configured to locate a flow path near a leading edge of a tube within one section and near a trailing edge of the tube within another section.

Abstract: A keel cooler having a standard header with an internal beveled bottom wall, with orifices on the inner wall of the exterior tubes extending into the header, the orifices being in the natural flow path of the coolant flow. The orifices are sufficiently large so as not to restrict the flow of coolant. A fluid flow diverter is additionally provided in the header of the keel cooler for facilitating coolant flow towards both the interior tubes and also towards the exterior tubes.

Abstract: A heat exchanger 1 includes a heat exchanger core section 4; a refrigerant inlet header section 5 and a refrigerant outlet header section 6, which are disposed on the upper-end side of heat exchange tubes 12; and a refrigerant inflow intermediate header section 9 and a refrigerant outflow intermediate header section 11, which are disposed on the lower-end side of the heat exchange tubes 12. A flow-dividing control wall 67a having a plurality of refrigerant passage holes 71 and vertically dividing the interior of the second intermediate header section 11 into two spaces 11A and 11B is provided within the second intermediate header section 11. A communication is established between the first intermediate header section 9 and the lower space 11B of the second intermediate header section 11 at one end.

Abstract: The present invention relates to a heat exchanger which can suitably regulate the quantity, the feeding position or the feeding order of heat exchange medium fed into tubes to adjust heat exchange performance according to cooling and heating load. The heat exchanger comprises a plurality of tubes placed at least one header, each tube having both ends fixed to the header, medium-distributing means installed at the header for feeding heat exchange medium to the specific tubes, a tank placed over the medium-distributing means, the tank having a medium-inlet pipe, a medium-outlet pipe and distribution passages for feeding heat exchange medium to specific regions of the medium-distributing means, and medium-regulating means installed at the tank and operated in response to a control signal for adjusting the feed of the heat exchange medium.

Abstract: An upper header tank of an evaporator is formed by three plates. The outside plate has an inflow-side refrigerant-passage outwardly bulging portion whose one end portion communicates with a refrigerant inlet. The inside plate has tube insertion holes. The intermediate plate has communication holes for establishing communication between the tube insertion holes of the inside plate and the outwardly bulging portion of the outside plate. The communication holes of the intermediate plate are connected by communication portions so as to form a resin passage communicating with the outwardly bulging portion. Of all the communication portions of the refrigerant passage, a plurality of upstream communication portions are smaller in width than the remaining communication portions. The relation 0.25?A/B?0.35 is satisfied, where A represents the number of the narrow communication portions, and B represents the total number of the communication holes which form the refrigerant passage.