The heat exchanger has tubes and a header tank that is located at an end of the tubes in a longitudinal direction and communicates with the tubes. The header tank has a core plate that connects to the tubes and a tank body that is fixed to the core plate. The core plate has a tube connection surface, a sealing surface, and an inclined surface that connects the tube connection surface and the sealing surface with each other. A distance between the tube connection surface and an end surface of the tubes in the longitudinal direction is different from a distance between the sealing surface and the end surface in the longitudinal direction by disposing the inclined surface to incline with respect to the longitudinal direction. The tubes connect to the tube connection surface and the inclined surface in a condition of being inserted to the tube connection surface and the inclined surface.

The invention concerns a header (4) for a heat exchanger adapted to have a refrigerant fluid (FR) passed through it and comprising a wall (4a-4d) delimiting a chamber (6) accommodating a device (7) for distribution of the refrigerant fluid (FR) inside the chamber (6), the distribution device (7) comprising at least one conduit (8a, 8b) extending between two ends (20a, 20b; 29a, 29b) along a longitudinal axis (A1), at least a first end (20a) of the conduit (8a) being provided with an inlet opening (10) for the admission of the refrigerant fluid (FR) to the interior of the distribution device (7), the distribution device (7) being provided with at least one orifice (11) oriented transversely to the longitudinal axis (A1) for the evacuation of the refrigerant fluid (FR) from the distribution device (7) to the chamber (6), characterized in that it comprises at least one member (17a, 17b) for retaining the distribution device (7) inside the chamber (6) at least in part made in one piece with the wall (4a-4d) of the header (4).

A collecting tank for a heat exchanger may include at least one manifold for receiving a plurality of heat exchanger tubes of the heat exchanger. The at least one manifold may have a hollow space through which a fluid is flowable. The at least one manifold may include a bottom and a plurality of tank receptacles for receiving the plurality of heat exchanger tubes. The plurality of tank receptacles may be disposed in the bottom spaced apart from one another in a longitudinal direction and may extend in a transverse direction, which extends transverse to the longitudinal direction. In a height direction extending transverse to the longitudinal direction and transverse to the transverse direction, directed away from the hollow space, the bottom may have at least one curvature directed to an outside.

A heat exchanger includes: flat pipes each including a passage for refrigerant that are arranged side by side in a predetermined step direction; and a header collecting pipe extending along the predetermined step direction that is connected to the flat pipes. The header collecting pipe includes: a flat pipe-side header forming member; and an opposite-side header forming member facing the flat pipe-side header forming member. The flat pipes are inserted in the flat pipe-side header forming member and an internal space exists between the flat pipe-side header forming member and the opposite-side header forming member. When viewed along the predetermined step direction: the flat pipe-side header forming member has a flat pipe-side curved portion protruding toward the flat pipes and the opposite-side header forming member has an opposite-side curved portion protruding toward a side away from the flat pipes.

The present invention relates to a heat exchanger having a header structure for dispersing thermal stress. The purpose of the present invention is to provide a heat exchanger having a header structure for dispersing thermal stress, wherein the heat exchanger improves the structure of a tube insertion hole on a header so as to disperse as much thermal stress as possible, by focusing on the fact that thermal stress concentration mainly occurs in a tube nose.

In a tank structure of a heat exchanger having a narrow width header plate, to reduce thermal stress generated in a tube on the outermost side of the header plate in a lengthwise direction. Insertion holes, except for end-portion tube insertion holes at least located at end portions of a header plate in the lengthwise direction, are linked with deformation prevention beads formed along the lengthwise direction of the header plate, and the end-portion tube insertion holes are not linked with the deformation prevention beads.

A cooling system includes a heat exchanger having one or more rows of multiple flat tubes, louvered fins disposed between pairs of flat tubes, and special header tube connections to form a counter flow heat exchanger. Heat exchangers having multiple rows may be placed near or close to the server racks and may be in fluid communication with an outdoor heat exchanger having one or more rows. A single-phase fluid is pumped through a fluid circuit or loop, which includes the heat exchangers at the server racks and the outdoor heat exchanger. The single-phase fluid circuit including the heat exchangers at the IT racks may alternatively be in thermal communication with a water circuit that includes an outdoor fluid cooler. The flat tubes can be formed tubes with one or more channels, or extruded tubes with multiple channels. The heat exchangers include header tubes/connections, which facilitate easy fabrication and connection between rows and inlet/outlet, and lower the pressure drop.

A heat exchanger tank that includes external ribs that provide reinforcement to structure of the heat exchanger tank is disclosed. In addition, at least one reinforcement element may engage with an external tank portion and may be tensioned by press fitting the at least one reinforcement element on the external tank portion such that limbs of the at least one reinforcement element are separated by the external tank portion between the external ribs. The at least one reinforcement element may further be maintained in the tensioned configuration by using at least one retention means.

A heat exchanger including a first header tank and a second header tank that are disposed to be spaced apart a predetermined distance in a height direction and a core part that is disposed between the first header tank and the second header tank and includes a plurality of tubes and fins, the first header tank including a first header plate, a first tank, and a first partition wall that divides a space formed by a combination of the first header plate and the first tank to form a plurality of flow paths, a manifold including an inflow passage and an outflow passage being connected to an outer side of the first header tank, and the inflow passage and the outflow passage having different sizes to each other, the outflow passage having a larger cross-sectional area than that of the inflow passage.

A heat exchanger includes tubes, a pair of tanks, and a connector. The tubes are stacked with each other in a stacking direction. The pair of tanks are disposed at both ends of the tubes and a longitudinal direction of the tanks extends along the stacking direction. At least one of the tanks is a connecting tank. The connector is disposed in a side portion of the connecting tank to fluidly connect a pipe to the connecting tank. The connecting tank has a tubular shape and includes a flat surface on the side portion. The connector includes a facing surface facing the flat surface. The facing surface is joined to the flat surface such that at least a portion of the facing surface extends beyond the flat surface in a lateral direction of the connecting tank.