A refrigerant heat exchanger has the passage defining member. The passage defining member is made of carbon fiber reinforced plastics. The passage defining member has a tube portion defining a refrigerant passage. The passage defining member has the plate portion which spreads from the tube portion. In the tube portion, carbon fibers are oriented to surround the tube portion. This orientation contributes to a pressure resisting performance in a radial direction of the tube portion. In the plate portion, the carbon fibers are oriented to protrude from the tube portion. This orientation contributes to improve mechanical strength in the plate portion. The carbon fibers are extended over both the tube portion and the plate portion. This orientation promotes thermal transfer over the tube portion and the plate portion.

A heat exchanger includes a heat exchanger core. The heat exchanger core includes a first fin and a second fin. The second fin is spaced apart from the first fin. The heat exchanger core also includes a primary passage defined between the first fin and the second fin and extending through the heat exchanger core. The heat exchanger core also includes a plurality of airfoils extending through the first fin, the primary passage, and the second fin. At least one airfoil of the plurality of airfoils includes a secondary passage. The secondary passage extends through the heat exchanger core within the at least one airfoil transverse to the primary passage.

Disclosed are a heat exchanger and a method of manufacturing a heat exchanger. The heat exchanger may include a plurality of three-step tubes, each having a three-layered section and each having a liquid passage at a middle portion and module insertion spaces at opposite sides of the liquid passage, a plurality of thermoelectric modules inserted into the module insertion spaces, a plurality of cooling fins coupled to an outer surface of each of the three-step tubes, and an upper tank and a lower tank coupled to an upper side and a lower side of the three-step tubes to be fluidically communicated with the liquid passages of the three-step tubes. The three-step tubes and the cooling fins may be stacked laterally with respect to each other. The three-step tubes, the cooling fins, the upper tank, and the lower tank may be brazed by a same filler material comprising a metal.

A heat exchanger includes a first header, a second header and a plurality of heat transfer components, wherein the heat transfer components each includes a heat transfer tube extending from the first header to the second header and allowing refrigerant to flow in its inside, and an extension portion being provided in each of the heat transfer tubes and configured to promote heat transfer property of the heat transfer tubes, and wherein the extension portion includes a base portion extending from the heat transfer tube in a second direction in which air that flows between the plurality of heat transfer tubes flows, and a spacer portion extending from the base portion in the first direction and abutting the adjacent heat transfer component.

The invention involves a micro-channel heat exchanger, which includes flat tubes (8), fins(9) and plate-type header pipes communicated with the flat tubes, (8) each plate-type header pipe comprising a flat tube groove plate, a distribution plate (2) and an outer side sealing plate (5), a plurality of flat tube groove through holes (3) are provided in the flat tube groove plate (1) along a length direction, throttling channels (4) communicated with the flat tube groove through holes (3) are provided in the distribution plate (2) along an arrangement direction of the flat tube groove through holes (3), the outer side sealing plate (5) is provided on one side, far away from the flat tube groove plate (1), of the distribution plate (2). The micro-channel heat exchanger can solve the problems of low heat exchange efficiency and small heat exchange area of the heat exchanger.

A heat exchanger includes a plurality of flat tubes, and a header. A flow passage provided inside the header includes a plurality of partition portions each provided between the adjacent flat tubes, a plurality of insertion portions formed between the adjacent partition portions, a first communication passage allowing one ends of the adjacent insertion portions to communicate with each other, and a second communication passage allowing an other ends of the adjacent insertion portions to communicate with each other. A cross-sectional area of the first communication passage is larger than a cross-sectional area of the second communication passage, and the first communication passage is provided with a first refrigerant inlet connected to the flow passage and allowing the refrigerant to flow into the header. Thus, a heat exchanger performance can be improved by reducing a refrigerant pressure loss and by achieving uniform distribution of the refrigerant.

The present invention relates to a heat exchanger comprising: a header tank having a plurality of flow paths in which a heat exchange medium flows; multiple rows of tubes connected to the header tank; and heat radiation fins interposed between the tubes, wherein the tubes include a heat exchange part coupled to the heat radiation fins and a coupling part that is formed on a longitudinal end of the heat exchange part and coupled to the header tank, the width of the coupling part is formed to be less than the width of the heat exchange part so that the overall package size of the heat exchanger may be reduced, thus enabling a compact configuration, and the space between neighboring rows of the tubes may be reduced, thus making it possible to reduce the material of the heat radiation fins.

A heat exchanger includes: refrigerant channels that extend in a first direction, are disposed along a second direction intersecting with the first direction, and are disposed along a third direction intersecting with the first direction and the second direction; and heat transfer tubes defining the refrigerant channels. One or both of a size of an outer edge and a size of an inner edge of the heat transfer tubes are different between a first position and a second position in the first direction. Outer surfaces of the heat transfer tubes each include a protrusion that protrudes in a direction intersecting with the first direction, and is in contact with an outer surface of one of the heat transfer tubes adjacent thereto in the second direction. The protrusion includes a concave portion extending along the third direction.

The present invention relates to transfer of heat by thermosiphon blocks, thermosiphons or thermosiphon systems configured to be used or assembled to transfer heat. Thermosiphon block configured for a refrigerant to circulate between a first header and a second header interconnected with a fluid communicator arrangement comprising multiple MPE-tubes with fins in-between. The first header may have a receiving volume adapted to receive liquid refrigerant and to distribute the liquid refrigerant to the second header via a liquid communicator. The bock may be sealed. The invention also relates to a thermosiphon system comprising at least a first thermosiphon block. The first thermosiphon block may be configured as an evaporator with the receiving volume in the first header connected to a condenser. The thermodynamic system may have a piping between the first thermosiphon block and the condenser. The first thermosiphon block may be configured to be placed inside of a building, housing or a cabinet.

Provided are rectangular plate-like fins 2 layered at intervals; and flat tubes 3 which are perpendicularly extended through the layered plate-like fins 2 and are provided on multiple levels along a longitudinal direction of the plate-like fins 2. The plate-like fins 2 are provided with at least one heat transfer promoting section 6 that is positioned in a region between adjacently-positioned flat tubes 3 and in which ridge sections 4 and valley sections 5 having ridgelines extending in the longitudinal direction of the plate-like fins 2 are arranged to alternate. En the heat transfer promoting section 6, at least one slit 7 allowing communication between a front and a back of the plate-like fin 2 is formed on a downwind side of the ridge sections 4.