The present disclosure provides a heat exchanger flat tube and a heat exchanger with the heat exchanger flat tube, the heat exchanger flat tube includes two plates opposite to each other, a fluid passage is formed between the two plates, a turbulence structure is provided in the fluid passage and has a gradually expanding portion and a gradually narrowing portion, both an extension direction of the gradually expanding portion and an extension direction of the gradually narrowing portion are consistent with a flow direction of a fluid, and the gradually narrowing, portion is located downstream of the gradually expanding portion along the flow direction of the fluid.

Device for heat transfer and method for making it, the device having a housing with a heat exchanger disposed within and completely enclosed by the housing having a receiving element and cover element integrated within receiving element. First fluid flows through heat exchanger to be cooled; another fluid flows around heat exchanger. Heat transfer elements are shaped as a plate of a first jacket element and a second jacket element as well as a fin element; each includes a throughflow sector for inflow and outflow of first fluid. Each throughflow sector is developed on a front face of heat transfer element. Fin element has a lesser dimension in a longitudinal direction than jacket elements and is disposed therebetween such that in the proximity of a second front face, located distally to first front face, a free region is developed for deflecting direction of flow of first fluid.

A heat exchanger for a heating device includes a plurality of tubes arranged in a juxtaposed configuration, and at least one first manifold member on the outside of the tubes. Each tube is wound in a spiral having a plurality of substantially co-planar turns including at least one inner turn and at least one further turn around the inner turn. At least one first tube has a first end portion, which extends starting from the inner turn towards the outside of the corresponding spiral, with at least one part of the first end portion that is superimposed on the at least one further turn in a position corresponding to a major face of the spiral, for connection to the at least one first manifold member. The at least one first tube has at least one transverse depression in which a corresponding part of the first end portion is at least partially received.

A tube for a thermal transfer device can include a wall having a length and having an inner surface and an outer surface, wherein the inner surface forms a cavity. The tube can also include at least one first dimple pressed into the wall toward the cavity at a first location along the length of the wall, where the inner surface of the wall at the at least one first dimple is separated from itself by a first distance. The tube can further include at least one second dimple pressed into the wall toward the cavity at a second location along the length of the wall, where the inner surface of the wall at the at least one second dimple is separated from itself by a second distance. The cavity can be configured to receive a fluid that flows continuously along a length of the at least one wall.

A heat exchanger may include an outer casing extending in a longitudinal direction and delimiting a volume through which a first fluid is flowable, and a tube bundle including a plurality of tube bodies arranged in the volume and through which a second fluid is flowable. In a cross section, the volume may have an inner surface area and an inner circumference and each tube body may have an outer circumference and an outer surface area. A ratio of a sum of the outer circumferences to the inner circumference may be at least 5.5, and a sum of the outer surface areas may account for 64% or less of the inner surface area. A residual cross section area of the inner surface area may be delimited between the outer casing and the plurality of tube bodies.

A heat exchanger includes tube expansion portions provided respectively on a plurality of heat transfer tubes such that outer peripheral surfaces of the heat transfer tubes are respectively pressed against inner peripheral surfaces of a plurality of first holes provided in a side wall portion of a case, and a plurality of first concave surface portions provided in an outer surface of the tube expansion portion so that first gaps, into which brazing material of a first brazed portion advances, are formed between the outer surface of the tube expansion portion and the inner peripheral surface of the first hole. At least one of the plurality of first concave surface portions is positioned in an outside peripheral surface portion of the outer peripheral surface of the heat transfer tube. According to this configuration, the strength with which the heat transfer tubes are attached to the case can be increased while simplifying a manufacturing operation and reducing the manufacturing cost.

A heat exchanger for an apparatus including a burner has at least one tube extending along a centerline from an inlet end adjacent the burner to an outlet end. A plurality of indentations is formed in the tube adjacent the inlet end and extend radially inward towards the centerline. The indentations are formed in opposing pairs extending towards one another to a depth sufficient to create turbulent fluid flow through the inlet end of the tube.

The disclosure provides a flat tube for a microchannel heat exchanger and the microchannel heat exchanger, and relates to the field of air conditioners. The flat tube includes a first wallboard (1.1) and a second wallboard (1.2) that are formed separately; and the first wallboard (1.1) and/or the second wallboard (1.2) have/has a plurality of protrusion portions protruding into a refrigerant circulation cavity, to form multiple refrigerant channels arranged along a length direction of the flat tube. The flat tube for the microchannel heat exchanger uses a stamping method, thus reducing a production cost and a production difficulty.

A heat exchange member includes: a lid portion; a bottom plate portion; a plurality of partition portions disposed so as to connect the lid portion and the bottom plate portion, a part surrounded by the lid portion, the bottom plate portion and the partition portion defining a first flow passage through which a first fluid flows; a curved portion curved toward the first flow passage on a first flow passage side of at least one of the lid portion and the bottom plate portion when viewed in a cross section perpendicular to a direction in which the first fluid flows.

A heat exchanger tube includes a central tube portion having a C-shape cross-section. A pair of tube ends includes the C-shape cross-section or a different cross-section. A heat exchanger tube assembly and a method for manufacturing a C-shape heat exchanger tube are also described.