An air conditioner includes a heat exchanger that is arranged in a ventilation flue inside a housing, wherein the heat exchanger includes a plurality of flat tubes, and a fin that includes a plurality of notch portions arranged side by side in a vertical direction, to which the plurality of flat tubes are inserted, and includes intermediate regions each formed between two of the notch portions adjacent to each other in a vertical direction, and a connection region connecting the intermediate regions to each other, first bulging portions that are at least partly positioned on the intermediate regions, and a second bulging portion that overlaps with a gap generated between the first bulging portions and the flat tubes.

A heat exchanger includes: a heat exchanging part that includes flat tubes aligned vertically when the heat exchanger is installed; a first flow divider that includes a first pipe through which a refrigerant enters or exits from the first flow divider, second pipes that provide refrigerant flow paths between the heat exchanging part and the first pipe, and a main body that internally has a first space; and second flow dividers that each internally include one of second spaces that provide refrigerant flow paths between the heat exchanging part and the first flow divider. The first space communicates with a first end of the first pipe and a first end of each of the second pipes and causes the refrigerant to flow from the first pipe into the second pipes or from the second pipes into the first pipe.

A heat exchanger including: a header; flat tubes connected to the header and disposed in line along a longitudinal direction of the header; a first partition that partitions an inner space of the header into a first space on a side where the flat tubes are connected and a second space on a side opposite to the first space; and a second partition that partitions the inner space of the header into a first side and a second side. The first side is one side of the header in the longitudinal direction and the second side is opposite to the first side. The first partition has a common opening. The common opening includes an insertion opening and a refrigerant opening. A refrigerant moves between the first space and the second space via the refrigerant opening. The second partition is inserted into the insertion opening.

A heat exchanger for a water heater having a burner includes an outer tube extending longitudinally along a centerline from a first end adjacent the burner to a second end. Indentations are formed along the length of the outer tube and extend towards the centerline. An inner member extends through the outer tube and between the indentations such that flue gases from the burner flow in a passage between the inner member and the outer tube from the first end to the second end of the outer tube.

A thermal management system includes a plurality of thermal management assemblies. Each of the thermal management assemblies has a monolithic foil structure having a body with an external surface and a differently shaped and opposing internal surface. The external surface forms an outer profile and the internal surface forming an internal conduit with the outer profile and the internal conduit having different shapes. The monolithic foil structure is configured to physically isolate a first fluid flowing along the external surface from a second fluid flowing in the internal conduit. The body is configured to transfer thermal energy between the first fluid flowing along the external surface and the second fluid flowing in the internal conduit.

A receiver drier assembly for an automotive heat exchanger is provided with a single-piece cap. In embodiments described herein, a modulator has a tubular wall and one or more openings are formed therein. The cap is a single-piece cap and is configured to attach directly to the tubular wall via a snap fit. The cap may have a protrusion that is configured to snap into engagement with the opening in the modulator when properly assembled. The protrusion may be tapered such that as the cap is assembled to the modulator, the protrusion is forced radially inwardly via the tapered surface sliding along the tubular wall. Once the protrusion meets the opening, the protrusion is allowed to flex radially outward toward its natural unbiased position, snap fitting with the opening of the tubular wall.

A heat exchanger, a heat exchanger unit, and a refrigeration cycle apparatus are provided where deterioration in drainage and ventilation properties is prevented, an air passage is not easily clogged when frost forms, and both defrosting properties and heat exchange performance are achieved. A flat tube and a plurality of fins that are each a plate having a plate surface extending in a longitudinal direction and in a width direction orthogonal to the longitudinal direction are provided. The plate surface intersects a pipe axis of the flat tube. The plurality of fins each have an insertion portion in which the flat tube is inserted, a first spacer formed at a rim of the insertion portion and maintaining the interval, and a second spacer formed at a portion of the plate other than the rim of the insertion portion and maintaining the interval.

A method for manufacturing heat exchangers includes securing a plurality of tubes to first and second header plates such that each tube extends between the first and second header plates and such that each tube is spaced apart from adjacent tubes; disposing a portion of the plurality of fins between adjacent tubes of the plurality of tubes other than a preselected pair adjacent tubes of the plurality of tubes; disposing a spacer between the tubes of the preselected pair adjacent tubes; heating the first and second header plates, the plurality of tubes, the plurality of fins, and the spacer in a brazing furnace such that a brazing material joins the plurality of fins to the plurality of tubes; and dividing each of the first and second header plates between the tubes of the preselected pair of adjacent tubes to form two heat exchangers.

A thermal management system includes a plurality of thermal management assemblies. Each of the thermal management assemblies has a monolithic foil structure having a body with an external surface and a differently shaped and opposing internal surface. The external surface forms an outer profile and the internal surface forming an internal conduit with the outer profile and the internal conduit having different shapes. The monolithic foil structure is configured to physically isolate a first fluid flowing along the external surface from a second fluid flowing in the internal conduit. The body is configured to transfer thermal energy between the first fluid flowing along the external surface and the second fluid flowing in the internal conduit.

A heat exchanger includes a first plate, a second plate separated from the first plate by a gap, and a first fin disposed across the gap, extending between and connected to each of the first and second plates. The first fin includes a stress concentration element disposed at a location separated from a first junction connecting the first fin to the first plate and a second junction connecting the first fin to the second plate.