Abstract: A cold generator incorporates a heat exchanger unit integrating a heat-emitting heat exchanger and a heat-absorbing heat exchanger. The heat exchanger unit has a flow path layer stack built up in a stacked construction. In order to form the heat-emitting heat exchanger in the flow path layer stack, at least one heat-emitting refrigerant flow path and at least one heat-absorbing second heat transport flow path are provided. A second heat transport medium guided in a second heat transport circuit is arranged to flow through the second heat transport flow path. At least one heat-absorbing refrigerant flow path and at least one heat-emitting first heat transport flow path are provided in order to form the heat-absorbing heat exchanger in the flow path layer stack with a first heat transport medium guided in a first heat transport circuit that is arranged to flow through the first heat transport flow path.

Abstract: In a cold generator, comprising a refrigerant circuit, it is provided that: the cold generator comprises a heat exchanger unit in which a heat-emitting heat exchanger and a heat-absorbing heat exchanger are integrated, wherein the heat exchanger unit comprises a flow path layer stack which is built up in a stacked construction; in order to form the heat-emitting heat exchanger in the flow path layer stack, at least one heat-emitting refrigerant flow path and at least one heat-absorbing second heat transport flow path are provided; a second heat transport medium guided in a second heat transport circuit flows or is arranged to flow through the second heat transport flow path; at least one heat-absorbing refrigerant flow path and at least one heat-emitting first heat transport flow path are provided in order to form the heat-absorbing heat exchanger in the flow path layer stack; and a first heat transport medium guided in a first heat transport circuit flows or is arranged to flow through the first heat transpo

Abstract: A heat exchanger, such as a condenser or gas cooler, having a collecting tube which has a wall and which can be produced by deformation of a single metal strip, which collecting tube has, in its base, at least one row of openings in which heat exchanger tubes, each of which has two narrow and two wide sides, are fastened at their ends. The collecting tube can have at least two chambers, which adjoin one another approximately at a central longitudinal axis, and also a reinforcement, which is formed by the longitudinal edge strips of the metal strip.

Abstract: The present invention relates to a soldered flat tube for condensers and/or for evaporators in air-conditioning systems, in particular in motor vehicles, which can be produced by deformation of endless aluminum sheet-metal strips, has two narrow sides and two wide sides and also has inner passages with a hydraulic diameter which is greater than or equal to 0.254 mm, and the flat tube has a tube wall thickness of less than 0.25 mm, wherein both narrow sides are reinforced by having at least double the thickness of the remaining tube wall thickness.

Abstract: A heat exchanger, in particular a condenser or gas cooler, having a collecting tube which has a wall and which can be produced by deformation of a single metal strip, which collecting tube has, in its base, at least one row of openings in which heat exchanger tubes, each of which has two narrow and two wide sides, are fastened at their ends. The collecting tube can have at least two chambers, which adjoin one another approximately at a central longitudinal axis, and also a reinforcement, which is formed by the longitudinal edge strips of the metal strip, of the base between the heat exchanger tubes. To improve the internal pressure stability and also to reduce costs, the reinforcement which is formed from the longitudinal edge strips can extend at least over 1/3 of a surface area of the base.

Abstract: A plate heat exchanger for exchanging heat between first and second media, including a plurality of first heat exchanger plates alternately stacked with a plurality of second heat exchanger plates between a base plate and a cover plate. The first and second heat exchanger plates have at least four passages therethrough which align to define a first collecting channel and a first distribution channel for the first media and a second collecting channel and a second distribution channel for the second media. First flow channels for the first media each are defined in a space between one side of the first heat exchanger plate and a facing one side of the adjacent second heat exchanger plate. Second flow channels for the second media each are defined between the other side of the first heat exchanger plate and the other side of the adjacent second heat exchanger plate.

Abstract: A header/manifold construction (14) is adapted to receive a plurality of flattened tube ends (42) in a heat exchanger (10) having a plurality of flattened tubes (12). The header/manifold construction (14) includes first and second pieces (20, 22) extending along a longitudinal axis (24). The first piece (20) has a C-shaped transverse cross defined by an elongate opening (44) extending along the longitudinal axis (24), with a plurality of tube slots (40) spaced along the axis (24) opposite from the opening (44). The second piece (22) has a T-shaped transverse cross section with two side legs (48, 50) extending from opposite sides of a center leg (46), with the legs (46, 48, 50) being bonded to surfaces of the first piece (20).

Abstract: An air-conditioning loop with a transcritical refrigerant including a compressor, a gas cooler, an evaporator, an expansion device, an internal heat exchanger for heat exchange between a high-pressure side and a low-pressure side, an accumulator on the low-pressure side between evaporator and the internal heat exchanger, and a gas accumulator on the low-pressure side.

Abstract: A compressor and heat exchanger for a refrigerant loop of a vehicle air conditioner having at least one gas cooler/condenser, an evaporator and expansion valve, and a refrigerant which is subjected to heat exchange with coolant of the vehicle engine in at least one location of the refrigerant loop. The compressor is in heat exchange relationship with at least one refrigerant/coolant heat exchanger with at least one flow channel for the refrigerant and at least one flow channel for the coolant. There is at least one refrigerant inlet, and at least one refrigerant outlet on the high pressure side, wherein the refrigerant inlet and outlet are arranged in a single connection element. The heat exchanger is directly adjacent to the connection element, and at least one flow channel for coolant is in heat-conducting contact with the connection element.

Abstract: A plate heat exchanger for exchanging heat between first and second media, including a plurality of first heat exchanger plates alternately stacked with a plurality of second heat exchanger plates between a base plate and a cover plate. The first and second heat exchanger plates have at least four passages therethrough which align to define a first collecting channel and a first distribution channel for the first media and a second collecting channel and a second distribution channel for the second media. First flow channels for the first media each are defined in a space between one side of the first heat exchanger plate and a facing one side of the adjacent second heat exchanger plate. Second flow channels for the second media each are defined between the other side of the first heat exchanger plate and the other side of the adjacent second heat exchanger plate.

Abstract: A compact cooling system includes a mounting panel adapted to receive a plurality of at least three cooling units, a cooling fan, and a fan drive mechanism. The mounting panel supports the fan and drive mechanism in a manner allowing rotation of the fan about the axis of rotation. A front side of the mounting panel is adapted for receiving and supporting the cooling units in a pattern defining a cantilevered, tubular polygonal solid disposed about the fan. The mounting panel includes a convex central region extending into the tubular polygonal solid and receiving the drive mechanism in operative connection to the fan. By virtue of this arrangement, a very compact cooling system is provided. The tubular polygonal shape of the cooling units, when mounted on the mounting panel, forms an air duct for directing a flow of cooling air induced by the fan through the cooling units.

Abstract: Optimization of the efficiency of a compact cooling system for air cooling of at least two different heat exchange fluids is obtained in a construction including three heat exchangers (10), (12), (14) arranged in a housing-like shape with an open center. A radial fan (44) is located within the housing and is rotatable about an axis (42). A front panel (36) having an air inlet (38) on the axis (44) abuts a corresponding one of the opposed sides (26), (62) of each of the heat exchangers while a rear panel abuts the other of the opposed sides (64) of each of the heat exchangers (10), (12), (14) and journals the fan (44) for rotation about the axis (44).

Abstract: A method and apparatus for drying the surface of a heat exchanger in a vehicle of moisture accumulating as a result of its use as an evaporator in an air conditioning system. Air is first heated by the heater core in the air conditioning system and then directed through the heat exchanger. Because of the reduced humidity of such air, any residual moisture in the heat exchanger is evaporated and is discharged to the environment. Where the system is used in a vehicle, it prevents the discharge of moist air onto the windows and/or windshield of the vehicle and thus minimizes or eliminates fogging of the windshield.

Abstract: A heat exchanger including a first header having an inlet therein, a second header, an outlet in one of the first and second headers, and a plurality of flat tubes extending between the first and second headers for carrying a fluid between the first and second headers. A first connector is also provided for connecting a first exterior line to one of the first and second headers, the first connector being proximate and substantially parallel to an end of one of the flat tubes. In a compact cooling system, such heat exchangers may be disposed about a radial fan directing air flow outwardly away from the fan axis. One of a system inlet and a system outlet are connected via the first exterior lines to the first connectors of at least two of the heat exchangers.

Abstract: A cooling system is provided for a vehicle that includes an air-cooled coolant radiator and air-cooled gas cooler to cool a gas flow of a CO2 type air conditioning system of the vehicle. The cooling system includes a pre-cooler for pre-cooling of the refrigerant by transferring heat from the refrigerant either to the coolant flowing through the radiator or to a cooling air flow passing through the radiator, or both.

Abstract: An air-cooled charge air cooler for vehicles with a coolant-filled pre-cooler oriented in an air collection tank of the charge air cooler. The pre-cooler is sized to contact a majority of the charge air entering the charge air cooler. The pre-cooler has flow paths carrying coolant between manifolds of the pre-cooler and the flow paths define channels therethrough to direct charge air through the pre-cooler and into a cooling grate of the charge cooler. The channels have a depth that allows for a corresponding adjustment in the length of the cooling grate of the charge air cooler while maintaining the overall space requirement for the charge air cooler in a vehicle and meeting the increasing performance requirements for such charge air coolers.

Abstract: A method and apparatus for drying the surface of a heat exchanger in a vehicle of moisture accumulating as a result of its use as an evaporator in an air conditioning system. Air is first heated by the heater core in the air conditioning system and then directed through the heat exchanger. Because of the reduced humidity of such air, any residual moisture in the heat exchanger is evaporated and is discharged to the environment. Where the system is used in a vehicle, it prevents the discharge of moist air onto the windows and/or windshield of the vehicle and thus minimizes or eliminates fogging of the windshield.

Abstract: A folded, elongated tube (28) is provided for use in a heat exchanger (10, 11). The tube (28) has a flattened cross section with a minor dimension (d) and a major dimension (D). The tube (28) includes a pair of parallel tube runs (36), and a folded section (40) connecting the pair of tube runs (36). The major dimensions (D) of the tube runs (36) lie in a common plane. The folded section (40) includes a U-shaped bend (42), a first twist (44), and a second twist (46). The U-shaped bend (42) includes a straight section (48) extending between two curved sections (50, 52), and has its major dimension (D) extending substantially transverse to the major dimension (D) of the tube runs (36). The first twist (44) connects one of the tube runs (36) to the curved section (50), and the second twist (46) connects the other tube run (36) to the other curved section (52) of the U-shaped bend (42).

Abstract: A compact cooling system includes a mounting panel adapted to receive a plurality of at least three cooling units, a cooling fan, and a fan drive mechanism. The mounting panel supports the fan and drive mechanism in a manner allowing rotation of the fan about the axis of rotation. A front side of the mounting panel is adapted for receiving and supporting the cooling units in a pattern defining a cantilevered, tubular polygonal solid disposed about the fan. The mounting panel includes a convex central region extending into the tubular polygonal solid and receiving the drive mechanism in operative connection to the fan. By virtue of this arrangement, a very compact cooling system is provided. The tubular polygonal shape of the cooling units, when mounted on the mounting panel, forms an air duct for directing a flow of cooling air induced by the fan through the cooling units.

Abstract: A transmission drives a radial fan about a fan axis in a vehicle cooling unit including a plurality of heat exchangers arranged to surround the radial fan to receive a radial air flow therefrom. A driving pulley, a driven pulley, and a idler pulley of the heat exchangers.