A heat exchanger including a tube/rib block made up of tubes and ribs, the tubes forming fluid channels for conducting a first fluid, in particular a refrigerant, and the ribs arranged between the tubes forming a second fluid channel for conducting a second fluid, such as, in particular, air, which flows around the tubes, a collector being arranged at at least one end of the tube/rib block, which communicates with the fluid channels of the tubes, the at least one collector being provided with a plate-type design and including at least one base plate and a cover plate, which are stacked and soldered in a sealed manner, a spacer for spacing the base plate at a distance from the cover plate and for distributing the first fluid in the collector being provided.

A heat exchanger comprising at least one fluid tube configured to extend substantially orthogonally to a wind direction, the fluid tube having a first wall and a second wall, and the fluid tube comprising: a first tube section and a second tube section each extending along the fluid tube, arranged such that each tube section is in fluid communication with a pair of manifolds and configured to contain a cooling fluid, wherein the first tube section is formed by the first wall, the second wall, a first outer wall and a first inner wall and the second tube section is formed by the first wall, the second wall, a second outer wall and a second inner wall, the first inner wall, the second inner wall, the first outer wall and the second outer wall extending substantially parallel along the fluid tube in fluid-tight contact with the first wall and the second wall, wherein the heat exchanger is configured to lead the cooling fluid in a first direction in the first tube section and in a second direction in the second tube section, the first direction being opposite to the second, wherein the cooling fluid is led through the second tube section before entering the first tube section and the first tube section is arranged upstream of the second tube section in relation to the wind direction so that a cooling air flowing in the wind direction cools the cooling fluid with the lowest temperature first, wherein the first inner wall and the second inner wall are spaced apart by at least one common area defined by the first inner wall and the second inner wall, the first inner wall and the second inner wall being arranged at a distance from each other, and the at least one common area being arranged between the first tube section and the second tube section and that the common area comprises at least one slot.

The invention relates to a heat exchanger (1) comprising a bundle of tubes (2) arranged parallel to one another and inside of which a first heat transfer fluid is intended to circulate, wherein a second fluid is intended to pass through the bundle of tubes (2) between said tubes (2), said bundle of tubes (2) comprising spacers (6) which are arranged between said tubes (2), said spacers (6) having corrugations (60) extending in the longitudinal direction of the tubes (2), said corrugations (60) having ridges (61) in contact with said tubes (2) and sidewalls (62) connecting said ridges (61), the spacers (6) comprising a first portion (6A) and a second portion (6B), the first portion (6A) being disposed upstream of the second portion (6B) in the direction of passage of the second heat transfer fluid, the first (6A) and second (6B) portions being made from two distinct parts of different shapes.

The present invention relates to a heat exchanger (1) comprising a bundle of tubes (2) arranged parallel to one another and inside of which a first heat transfer fluid is intended to circulate, a second fluid being intended to pass through the bundle of tubes (2) between said tubes (2), said bundle of tubes (2) comprising spacers (6) which are disposed between said tubes (2), said spacers (6) having corrugations (60) extending in the longitudinal direction of the tubes (2), said corrugations (60) having ridges (61) in contact with said tubes (2) and sidewalls (62) connecting said ridges (61), the spacers (6) comprising a first portion (6A) and a second portion (6B), the first portion (6A) being arranged upstream of the second portion (6B) in the direction of flow of the second heat transfer fluid, wherein the first portion (6A) protrudes from the front edge of the tubes (2), the ridges (61) of the first portion (6A) having a profile having a flat (64) and the ridges (61) of the second portion (6B) having a rounded profile (65) such that the corrugations (60) have a sinusoidal profile.

Provided is a refrigerant distributor including: a first space forming portion having a first refrigerant port and a second refrigerant port; and a second space forming portion, which extends laterally from a lower part of the first space forming portion, and has a plurality of heat transfer pipe connecting portions. A gas-liquid refrigerant mixture flows into the first space forming portion through the first refrigerant port. Heat transfer pipes are connected at positions of the plurality of heat transfer pipe connecting portions in the second space forming portion.

A condenser for a refrigerator according the present invention includes a heat exchange unit configured to receive at one side thereof refrigerant, which has been compressed in a compressor, to perform heat exchange between the refrigerant and air and to discharge the refrigerant, which has exchanged heat with the air, to an evaporator, wherein the heat exchange unit includes a flat tube, through one end of which the refrigerant is introduced and through a remaining end of which the refrigerant is discharged, thereby performing heat exchange between the refrigerant and the air, wherein the flat tube includes at least one bent tube portion defining plural rows of tubes, which are spaced apart from each other in an up-and-down direction, and wherein the plural rows of tubes define an intersection bent surface, which has a predetermined curvature and intersects the up-and-down direction.

A cooling unit includes a heat exchanger coil positioned coupled to a source of fluid. The heat exchanger includes at least one coil configured to face air being drawn through the heat exchanger. The at least one coil has a first pipe, a second pipe spaced from the first pipe, and a plurality of micro-channels disposed between and in fluid communication with the first pipe and the second pipe. Each of the first pipe, the second pipe and the plurality of micro-channels is configured to enable a countercurrent configuration between inner and outer fluids. Other embodiments of the cooling unit and methods of cooling are further disclosed.

A heat exchanger in which a connecting part may be coupled to a header tank of the heat exchanger in the short term without using a separate coupling component before a brazing process is performed, and a coupling method of a connecting part thereof. The connecting part is coupled to a first header tank or a second header tank while surrounding a predetermined region of an outer peripheral surface of the first header tank or the second header tank, a region of the connecting part to which external force is locally applied being coupled to the first header tank or the second header tank while protruding together with the first header tank or the second header tank.

A multi-step method is disclosed for exchanging heat in a vapor compression heat transfer system having a working fluid circulating therethrough. The method includes the step of circulating a working fluid comprising a fluoroolefin to an inlet of a first tube of an internal heat exchanger, through the internal heat exchanger and to an outlet thereof. Also disclosed are vapor compression heat transfer systems for exchanging heat. The systems include an evaporator, a compressor, a dual-row condenser and an intermediate heat exchanger having a first tube and a second tube. A disclosed system involves a dual-row condenser connected to the first and second intermediate heat exchanger tubes. Another disclosed system involves a dual-row evaporator connected to the first and second intermediate heat exchanger tubes.

A heat exchange conduit includes a body having a first portion including a first flow channel and a second portion including a second flow channel. A cross-section of the heat exchange conduit varies over a length of the heat exchange conduit.