Abstract: A stub connection for a heat exchanger that is arranged in a housing and has a stack including plates and fins. The housing consists of housing parts which can be joined together, and at least one first stub for a first heat-exchanging medium being integrated directly into the housing. The stub connection also includes at least one second stub for a second heat-exchanging medium that extends to outside the housing. The at least one second stub is configured for the connection of a line and is integrated directly or indirectly into the housing.

Abstract: A heat exchanger arrangement in a housing, such as an intake pipe of an internal combustion engine, has at least one stack including tubes and fins and an end plate having media connections, and wherein the stack is inserted into the housing and is fastened therein. A connecting block which contains the media connections and/or at least one profiled rail is arranged on the end plate. The housing has at least one cross-section-expanding wall graduation and/or at least one receptacle integrated into the housing wall, wherein the connecting block sits in the cross-section expansion and/or a cross section of the receptacle corresponds approximately to a cross section of the rail.

Abstract: An evaporator includes an inlet manifold, an outlet parallel to the inlet manifold, and a collection manifold parallel and adjacent to the outlet manifold. First flow conduits extend from the inlet manifold to the collection manifold, and at least one second flow conduit extends from the collection manifold to the outlet manifold. The evaporator can be housed within an enclosure to provide a cased evaporator. Air is conditioned by transferring heat from the air to refrigerant as the air passes through the evaporator. The refrigerant is received from outside the enclosure into the inlet manifold, and is directed through first and second refrigerant passes to receive heat from the air. The flow of refrigerant is received from the second pass into a collection manifold, is transferred to an outlet manifold, and is removed from the enclosure.

Abstract: A heat exchanger arrangement, for example for an internal combustion engine, having a brazed radiator block (1) which has flow paths (10) formed from pairs of plates and has flow ducts (3) between the plate pairs (P), wherein in each case at least one plate (11) of each plate pair has a plate elongation (12), and wherein the brazed radiator block is arranged in a housing (2) and, at its circumference, is sealed off with respect to the housing. To improve the sealing action between the radiator block (1) and the housing (2), it is provided according to the invention that the plate elongations (12) are formed such that a prescribed dimension of the brazed radiator block (1) can be set by means of deformation of the plate elongations (12).

Abstract: A heat exchanger is provided to efficiently transfer heat between air and a flow of refrigerant in a reversing air-sourced heat pump system. When the system is operating in heat pump mode, a flow of air is directed through the heat exchanger and is heated by the refrigerant. A portion of the flow of air is prevented from being heated by the refrigerant in a first section of the heat exchanger, and is used to sub-cool the refrigerant in another section of the heat exchanger after the remaining air has been heated by the refrigerant. The same heat exchanger can be used to cool a flow of air using expanded refrigerant when the system is operating in an air conditioning (cooling) mode.

Abstract: A stub connection for a heat exchanger that is arranged in a housing. The stub connection includes a first part which is fastened to the heat exchanger and a second part which has a stub shank extending through an opening in the housing and is seated in a hole of the first part. The stub connection also includes at least two seals. The first seal is an annular seal, which is seated in a groove of the stub shank and the second seal is a gasket, which is arranged between the opening, the stub shank, and the first part. The first seal is seated in the hole and seals between the stub shank and the first part.

Abstract: Heat exchanger systems described and illustrated here in include multiple stacked plates each defining an aperture, first and second flow ducts formed by the stacked plates, multiple inflow and outflow ducts formed by the apertures in the stacked plates, a first heat exchanger section defining a condenser including first and second flow ducts, a second heat exchanger section defining an evaporator, first, second and third fluids, and an expansion element for the first fluid connected to the heat exchanger. In some embodiments, the first fluid is in heat-exchanging contact with the second fluid in one of the first and second heat exchanger sections, the first fluid is in heat-exchanging contact with the third fluid in the other of the first and second heat exchanger sections, and/or the first fluid flows through the first flow duct in the first heat exchanger section.

Abstract: A system and method of operating a cooling system for a vehicle engine, wherein one or more motors are operable to rotate one or more fans. Each of the one or more motors is controlled by a motor controller associated with the motor, in response to a control signal received from a system controller and an enable signal received from the vehicle. The motor controller operates the motor at a speed based upon the control signal if the control signal is received, and operates the motor at a predetermined speed if the control signal is not received but the enable signal is received.

Abstract: A heat exchanger that transfers heat from an exhaust gas flow to a liquid coolant includes a first heat exchange section and a second heat exchange section located adjacent the first heat exchange section. The first heat exchange section is located within a first housing that at least partially encloses a first fluid volume. The second heat exchange section is located within a second housing that at least partially encloses a second fluid volume. A first plurality of heat exchange tubes traverses the first heat exchange section, and a second plurality of heat exchange tubes traverses the second heat exchange section. An exhaust gas flow path of the heat exchanger includes the first fluid volume and the interiors of the second plurality of heat exchange tubes. A coolant flow path of the heat exchanger includes the second fluid volume and the interiors of the first plurality of heat exchange tubes.

Abstract: The invention relates to a method for producing slots (11) in a tube wall (10), wherein a single die plate (2) provided with notches (20) is pushed into the tube (1) and punches (5) arranged in a row pierce the tube wall from the outside and in the process produce the slots (10), whereupon the die plate (2) is rotated about its longitudinal axis out of a working position and into a withdrawal position and is pulled out of the tube (1). Economical production of the slots in tubes having different cross-sectional shapes is achieved according to the invention in that during the slotting operation the tube wall (30) is gripped from the outside and held and is stabilized from the inside against two opposing support strips (25) by way of the die plate (2).

Abstract: A heat exchanger having a collection tank having an internal chamber and a header connected to the collection tank and receiving a number of flat tubes through apertures in the header. A reinforcing member received within the collection tank and/or the header functions to reinforce the header and/or the collection tank in applications where these elements are subject to internal pressures that would otherwise deform the header and/or collection tank to an unacceptable extent. The heat exchanger may include a curved gasket on each flat tube to match the shape of the flat tubes and a curved header. Also, another gasket can be located between a metal or plastic collection tank and a plastic or metal header, respectively, to prevent leakage therebetween.

Abstract: A heat exchanger and a method are provided to vaporize a working fluid using a heat sourcing fluid. The heat exchanger includes a first section, a second section, and a third section. A first portion of the heat sourcing fluid passes through the first section, in counter-flow with the working fluid. A second portion of the heat sourcing fluid passes through the second section, in co-flow with the working fluid. Both the first and second portions pass through the third section, in overall counter-flow with the working fluid. The working fluid passes sequentially through the third section, the first section, and the second section. The heat exchanger and/or the method may be used in a Rankine cycle for waste heat recovery or in a refrigerant cycle.

Abstract: A heat exchanger includes a casing, a fluid flow path extending between first and second ends of the casing; first and second bundles of heat exchanger tubes in first and second portions of a fluid flow path extending through the casing, and a third section of the fluid flow path connecting the first and second sections and having a sealing plate with one or more apertures for the fluid flow path to pass therethrough. By virtue of the sealing plate and its relationship with the adjacent structure of the heat exchanger, adjacent ends of the two bundles of tubes are each movable in at least one direction with respect to the casing and the other bundle of tubes.

Abstract: The present invention provides a heat exchanger for transferring heat between a first working fluid and a second working fluid. The heat exchanger can include a corrugated fin positionable along a flow path of the first working fluid between adjacent tube walls and being operable to increase heat transfer between the first working fluid and the second working fluid. The fin can include a leg defined between adjacent folds. The heat exchanger can also include a plurality of convolutions extending inwardly from a distal end of the leg and terminating at different distances from the end.

Abstract: A heat exchanger unit that includes a plurality of first heat exchanger ducts formed by a plurality of plates configured for a first flow of a coolant, a plurality of second heat exchanger ducts formed by the plurality of plates configured for a second flow to be cooled by the first flow, a first inlet for the first flow, a first outlet for the first flow, a first inlet for the second flow, and a second outlet for the second flow. The heat exchanger unit further includes an inlet chamber for the first flow from which a partial flow of the first flow is branched off, conducted through the plurality of first heat exchanger ducts and circulated within the heat exchanger unit to the first outlet.

Abstract: A heat exchanger includes a plurality of tubes, a collection tank having an inlet port and an internal chamber in fluid communication with the plurality of tubes, a header coupled to the collection tank and having a plurality of apertures each dimensioned to receive a corresponding tube, a gasket separating the header from the collection tank and sealing a gap between the header and the collection tank, and a reinforcement retaining the gasket in position between the header and the collection tank. The reinforcement includes a first web extending across the internal chamber and a second web spaced apart from the first web and extending across the internal chamber. The heat exchanger also includes a baffle coupled to and extending between the first web and the second web. The baffle extends across at least a portion of the internal chamber between the inlet port and the plurality of tubes.

Abstract: An exhaust gas recirculation cooler that includes an inlet tank, an outlet tank, and an exhaust gas flow conduit in fluid communication with the inlet tank and the outlet tank. The exhaust gas flow conduit includes a first end, a second end, a first narrow side, a second narrow side, a first channel adjacent the first narrow side and extending between the first end and the second end, a second channel adjacent the second narrow side and extending between the first end and the second end, and a plurality of third channels located between the first channel and the second channel and extending between the first end and the second end. At least one of the inlet tank and the outlet tank includes a wall that inhibits exhaust gas from flowing through the first channel while allowing exhaust gas flow through the plurality of third channels.

Abstract: Methods for producing slots in tube walls are described and illustrated, along with devices for producing slots in tube walls. In some cases, a first number of punches arranged in a row pierce through the tube wall and in so doing produce slots, followed by another number of punches piercing through the tube wall in such a way that the slots produced by the first number of punches alternate with respect to the slots produced by the second number of punches. Also, in some cases an internal support is used, whereby small slots are first produced in the tube wall while the internal support is within the tube. After the internal support is removed, the slots are widened to finished dimensions. The internal support can include upper and lower parts designed to engage one another in a sawtooth or undulating manner.