Abstract: A heat exchanger includes an inlet header in which a first inlet space and a second inlet space are formed, a plurality of first inlet-side heat exchanger tubes that are connected to the first inlet space, a plurality of second inlet-side heat exchanger tubes that are connected to the second inlet space, a return header in which a plurality of first return spaces connected to the first inlet-side heat exchanger tubes, respectively, and a plurality of second return spaces connected to the second inlet-side heat exchanger tubes, respectively, are formed, and a plurality of outlet-side heat exchanger tubes that are connected to the first and second return spaces, respectively, wherein a communication path that enables a first return space on a bottom side among the first return spaces and a second return space on a top side among the second return spaces to communicate is formed in the return header.

Abstract: A heat exchanger includes a plurality of flat heat transfer tubes and a header, wherein, in an interior portion of each of the plurality of flat heat transfer tubes, a plurality of upwind side channels and a plurality of downwind side channels are formed, the header includes a main body portion in which an interior portion space connected to the plurality of upwind side channels and the plurality of downwind side channels is formed, a partition member that divides the interior portion space into an upwind side space, and a flow inlet/outlet port that supplies a refrigerant to a lower part of the upwind side space, and, at a lower part of the partition member, a lower communication path that communicates the downwind side space and the upwind side space is formed.

Abstract: A heat exchanger includes flat heat transfer tubes and a header, wherein the header includes a first partition member that separates an internal space of a main body unit into a refrigerant inflow portion and an upper portion, a second partition member that separates the upper portion into a connected portion connected to the flat heat transfer tubes and an opposite portion, and a third partition member that separates the opposite portion into a windward portion and a leeward portion a plurality of windward communication holes allowing communication between the windward portion and the connected portion and a plurality of leeward communication holes allowing communication between the leeward portion and the connected portion are arranged in the second partition member an adjustment channel that increases a flow rate of the windward communication holes as compared to a flow rate of the leeward communication holes is arranged inside the header.

Abstract: A heat exchanger includes a plurality of flat heat transfer tubes and a header, wherein each of the flat heat transfer tubes internally includes a plurality of windward channels and a plurality of leeward channels that are arranged on a leeward side of the windward channels, the header includes a main body unit having an internal space that is connected to the windward channels and the leeward channels, a partition member that separates the internal space into a windward side space at a side of ends of the windward channels and a leeward side space at a side of ends of the leeward channels, and an inflow portion that supplies a refrigerant to the lower portion of the leeward side space, and an upper side communication path that allows communication between the leeward side space and the windward side space is formed in an upper portion of the partition member.

Abstract: A heat exchanger includes a first-row heat exchange module through which a refrigerant is introduced from the outside, a second-row heat exchange module through which the refrigerant is discharged to the outside, a third-row heat exchange module through which the refrigerant is discharged to the outside, and a flow-splitting module that splits the refrigerant from the first-row heat exchange module into the second-row heat exchange module and the third-row heat exchange module, wherein the refrigerant reciprocates one time in a flow path, the first-row heat exchange module constitutes a forward path of the flow path, and both the second-row heat exchange module and the third-row heat exchange module constitute backward paths of the flow path.

Abstract: A heat exchanger includes: a plurality of flat tubes; a fin in which a plurality of notches are arranged side by side in a vertical direction, the fin having a plurality of intermediate portions and a connecting portion connecting the intermediate portions to each other; and a first bulging portion having an upper end edge and a lower end edge provided between a first notch and a second notch, the upper end edge being positioned in the intermediate portion and the lower end edge being positioned in the connecting portion. The upper end edge has a first upper end positioned on an intermediate portion side, and a second upper end positioned on a connecting portion side, the first upper end being positioned to be higher than the second upper end, or the first upper end being positioned at the same height as the second upper end.

Abstract: There is provided a heat exchanger capable of suppressing a decrease in the amount of heat exchange due to the nonuniform air velocity distribution. The heat exchanger includes a plurality of rooms partitioned by partition plates inside the inlet header, a plurality of flat tubes connected to each room and a plurality of branch pipes connected to each room and the distributor, in which depending on an air velocity distribution, the number of the branch portions of the branch pipe connected to the room, to which the flat tubes located in a part having a high air velocity are connected, is less than the number of the branch portions of the branch pipe connected to the room, to which the flat tubes passing through a part having a low air velocity, are connected.

Abstract: A heat exchanger includes flat tubes, a header to which the flat tubes are connected, an inflow plate that separates a refrigerant inflow portion and a lower circulation portion, a vertical dividing plate that separates the lower circulation portion and an upper circulation portion, a lower dividing plate that divides the lower circulation portion into a lower ascent path on an internal side and a lower descent path of an external side, and an upper dividing plate that divides the upper circulation portion into an upper ascent path on a leeward side, and an upper descent path on a windward side, wherein the inflow plate includes an ejection hole on a leeward side and an internal side, and the vertical dividing plate includes a first passing port on a leeward side and an internal side, and a second passing port on a windward external side.

Abstract: A heat exchanger includes: a plurality of flat tubes that are stacked in a direction perpendicular to a refrigerant flow direction, and a plurality of fins that have a first flat tube insertion portion into which a first flat tube among the plurality of flat tubes is inserted, and a second flat tube insertion portion into which a second flat tube adjacent to the first flat tube is inserted. A first fin has, formed on the inner periphery of the first flat tube insertion portion, a cut and raised piece for spacing a fin pitch between the first fin and an adjacent second fin. The cut and raised piece has a raised portion of the same length as the fin pitch, and a folded portion that is folded back at the tip of the raised portion and that is in contact with the second fin.

Abstract: A heat exchanger includes a plurality of flat heat transfer tubes, and a header in which an insertion space is formed, wherein a plurality of first flow channels and a plurality of second flow channels are formed in each of the flat heat transfer tubes, the header includes a convex wall that divides the insertion space into a first space and a second space, a pipe penetration wall portion through which the flat heat transfer tubes pass such that the first flow channels are connected to the first space and the second flow channels are connected to the second space, and an inlet portion that supplies a refrigerant to the first space such that the refrigerant flows toward an inner wall surface of the pipe penetration wall portion that is in contact with the first space, and the convex wall is away from the pipe penetration wall portion.

Abstract: A heat exchanger includes a plurality of flat heat transfer tubes and a header, wherein the header includes an inflow plate that divides an interior portion of the header into an inflow portion and a circulation portion located on an upper side of the inflow portion, a first partition member that divides the circulation portion into ascending path to which the flat heat transfer tubes are connected and a descending path, that forms an upper communication path that communicates the ascending path and the descending path on an upper side of the circulation portion, and a lower communication path that communicates the ascending path and the descending path on a lower side of the circulation portion, and the inflow plate includes a first ejection hole that ejects, on the ascending path side and a downwind side, a refrigerant from the inflow portion to the ascending path.

Abstract: A heat exchanger includes a plurality of flat heat transfer tubes and a header, wherein each of the flat heat transfer tubes internally includes a plurality of windward channels and a plurality of leeward channels that are arranged on a leeward side of the windward channels, the header includes a main body unit having an internal space that is connected to the windward channels and the leeward channels, a partition member that separates the internal space into a windward side space at a side of ends of the windward channels and a leeward side space at a side of ends of the leeward channels, and an inflow portion that supplies a refrigerant to the lower portion of the leeward side space, and an upper side communication path that allows communication between the leeward side space and the windward side space is formed in an upper portion of the partition member.

Abstract: A heat exchanger includes a plurality of flat heat transfer tubes and a header, wherein, in an interior portion of each of the plurality of flat heat transfer tubes, a plurality of upwind side channels and a plurality of downwind side channels are formed, the header includes a main body portion in which an interior portion space connected to the plurality of upwind side channels and the plurality of downwind side channels is formed, a partition member that divides the interior portion space into an upwind side space, and a flow inlet/outlet port that supplies a refrigerant to a lower part of the upwind side space, and, at a lower part of the partition member, a lower communication path that communicates the downwind side space and the upwind side space is formed.

Abstract: A heat exchanger (5) includes a plurality of flat heat transfer tubes (11) and a header (12), wherein the header (12) includes a first partition member (21) that separates an internal space of a main body unit (20) into a refrigerant inflow portion (24) and an upper portion (25), a second partition member (22) that separates the upper portion (25) into a connected portion (26) connected to the plurality of flat heat transfer tubes (11) and an opposite portion (27), and a third partition member (23) that separates the opposite portion (27) into a windward portion (28) and a leeward portion (29) a plurality of windward communication holes (35) and a plurality of leeward communication holes (36) that allow communication from the windward portion (28) and the leeward portion (29) to the connected portion (26) are arranged the second partition member (22) an adjustment channel (30) that distributes the refrigerant from the refrigerant inflow portion (24) to the windward portion (28) and the leeward portion (29) an

Abstract: A heat exchanger includes an inlet header in which a first inlet space and a second inlet space are formed, a plurality of first inlet-side heat exchanger tubes that are connected to the first inlet space, a plurality of second inlet-side heat exchanger tubes that are connected to the second inlet space, a return header in which a plurality of first return spaces connected to the first inlet-side heat exchanger tubes, respectively, and a plurality of second return spaces connected to the second inlet-side heat exchanger tubes, respectively, are formed, and a plurality of outlet-side heat exchanger tubes that are connected to the first and second return spaces, respectively, wherein a communication path that enables a first return space on a bottom side among the first return spaces and a second return space on a top side among the second return spaces to communicate is formed in the return header.

Abstract: A heat exchanger includes a first-row heat exchange module through which a refrigerant is introduced from the outside, a second-row heat exchange module through which the refrigerant is discharged to the outside, a third-row heat exchange module through which the refrigerant is discharged to the outside, and a flow-splitting module that splits the refrigerant from the first-row heat exchange module into the second-row heat exchange module and the third-row heat exchange module, wherein the refrigerant reciprocates one time in a flow path, the first-row heat exchange module constitutes a forward path of the flow path, and both the second-row heat exchange module and the third-row heat exchange module constitute backward paths of the flow path.

Abstract: A heat exchanger includes flat tubes, a header to which the flat tubes are connected, an inflow plate that separates a refrigerant inflow portion and a lower circulation portion, a vertical dividing plate that separates the lower circulation portion and an upper circulation portion, a lower dividing plate that divides the lower circulation portion into a lower ascent path on an internal side and a lower descent path of an external side, and an upper dividing plate that divides the upper circulation portion into an upper ascent path on a leeward side, and an upper descent path on a windward side, wherein the inflow plate includes an ejection hole on a leeward side and an internal side, and the vertical dividing plate includes a first passing port on a leeward side and an internal side, and a second passing port on a windward external side.

Abstract: A heat exchanger includes: a plurality of flat tubes; a fin in which a plurality of notches are arranged side by side in a vertical direction, the fin having a plurality of intermediate portions and a connecting portion connecting the intermediate portions to each other; and a first bulging portion having an upper end edge and a lower end edge provided between a first notch and a second notch, the upper end edge being positioned in the intermediate portion and the lower end edge being positioned in the connecting portion. The upper end edge has a first upper end positioned on an intermediate portion side, and a second upper end positioned on a connecting portion side, the first upper end being positioned to be higher than the second upper end, or the first upper end being positioned at the same height as the second upper end.

Abstract: A heat exchanger (5) comprises: a plurality of flat tubes that are stacked in a direction perpendicular to a refrigerant flow direction, and a plurality of fins (111) that have a first flat tube among the plurality of flat tubes, a second flat tube adjacent to the first flat tube, a first flat tube insertion portion (113A) into which the first flat tube is inserted, and a second flat tube insertion portion (113B) into which the second flat tube is inserted. A first fin (111) has, formed on the inner periphery of the first flat tube insertion portion (113A), a cut and raised piece (114) for spacing a fin pitch (P) between the first fin (111) and an adjacent second fin (111). The cut and raised piece (114) has a raised portion of the same length as the fin pitch (P), and a folded portion that is folded back at the tip of the raised portion and that is in contact with the second fin (111).

Abstract: 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.