Abstract: 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.

Abstract: A heat exchanger includes a heat transfer unit (HTU) including a heat transfer channel portion (HTCP) and auxiliary heat transfer portions (AHTPs). The HTCP and the AHTPs extend in a direction and are disposed in another direction being perpendicular to the direction. One of the AHTPs is an AHTP adjacent to the HTCP in another direction. When viewed from the direction, the AHTP is at an end of the HTU in another direction. A distance from the AHTP to the HTCP in another direction is defined as a length, in a case where the HTU further includes a plurality of HTCPs, the length is larger than a distance between adjacent ones of the HTCPs in another direction, and in a caser where the heat exchanger further includes a plurality of HTUs, the length is larger than a distance between the HTUs adjacent to each other in a direction different.

Abstract: 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.

Abstract: A heat exchanger includes: a gas-refrigerant pipe; a header connected to the gas-refrigerant pipe; and heat transfer tubes connected to the header. The header includes: a first plate member; and a second plate member that is stacked on the first plate member in a plate-thickness direction. The first plate member includes a first opening that constitutes an internal space of the header. The second plate member includes a second opening that, together with the first opening, constitutes the internal space of the header. The internal space of the header communicates with the heat transfer tubes. A first direction is perpendicular to both the plate-thickness direction and a direction in which the heat transfer tubes are arranged. A width of a part of the first opening in the first direction is different from a width of the second opening in the first direction.

Abstract: A heat exchanger includes heat transfer tubes and a header that forms a refrigerant flow path. The header includes: a first member that includes a first plate-shaped portion; a second member that includes a second plate-shaped portion; a third member that includes a third plate-shaped portion positioned between the first plate-shaped portion and the second plate-shaped portion in a first direction that is a direction in which the first plate-shaped portion and the second plate-shaped portion are arranged; a fourth member that includes a fourth plate-shaped portion positioned between the first plate-shaped portion and the second plate-shaped portion in the first direction and a second opening that constitutes a part of the refrigerant flow path, where a second is along a longitudinal direction of the second opening; and a fifth member.

Abstract: A heat exchanger includes: a header that extends in a first direction; and a plurality of heat transfer tubes that extend in a second direction crossing the first direction, each of which has one end connected to the header, and that are arranged in the first direction at intervals. The header includes: a header body having a tubular shape, a first member through which the one end of each of the heat transfer tubes extends, and a second member positioned between the header body and the first member in the second direction. The second member includes: a base portion that extends in the first direction, and a plurality of protruding portions that extend from the base portion toward the first member in the second direction.

Abstract: A heat exchanger includes: a gas-refrigerant pipe; a header connected to the gas-refrigerant pipe; and heat transfer tubes connected to the header. The header includes: a first plate member; and a second plate member that is stacked on the first plate member in a plate-thickness direction. The first plate member includes a first opening that constitutes an internal space of the header. The second plate member includes a second opening that, together with the first opening, constitutes the internal space of the header. The internal space of the header communicates with the heat transfer tubes. A first direction is perpendicular to both the plate-thickness direction and a direction in which the heat transfer tubes are arranged. A width of a part of the first opening in the first direction is different from a width of the second opening in the first direction.

Abstract: A heat exchanger includes heat transfer tubes and a header that forms a refrigerant flow path. The header includes: a first member that includes a first plate-shaped portion; a second member that includes a second plate-shaped portion; a third member that includes a third plate-shaped portion positioned between the first plate-shaped portion and the second plate-shaped portion in a first direction that is a direction in which the first plate-shaped portion and the second plate-shaped portion are arranged; a fourth member that includes a fourth plate-shaped portion positioned between the first plate-shaped portion and the second plate-shaped portion in the first direction and a second opening that constitutes a part of the refrigerant flow path, where a second is along a longitudinal direction of the second opening; and a fifth member.

Abstract: A heat exchanger includes: heat transfer tubes disposed along a predetermined direction; and a header that retains longitudinal ends of the heat transfer tubes. The header includes: a first member including a main wall portion that has through holes through which the longitudinal ends respectively pass; a second member defining insertion spaces that communicate with the heat transfer tubes at the longitudinal ends; and a third member facing the longitudinal ends. The second member includes: a pair of side plates disposed in a width direction of the header and that define the insertion spaces therebetween; and a partition plate connected to the pair of side plates and that separates adjacent ones of the insertion spaces.

Abstract: A heat exchanger includes: a header that extends in a first direction; and a plurality of heat transfer tubes that extend in a second direction crossing the first direction, each of which has one end connected to the header, and that are arranged in the first direction at intervals. The header includes: a header body having a tubular shape, a first member through which the one end of each of the heat transfer tubes extends, and a second member positioned between the header body and the first member in the second direction. The second member includes: a base portion that extends in the first direction, and a plurality of protruding portions that extend from the base portion toward the first member in the second direction.

Abstract: A heat exchanger includes: rows of heat transfer tubes disposed next to one another in an air flow direction; and headers each connected to an end of each of the rows of heat transfer tubes. A center position of an upstream-most header disposed on a most upstream side in the air flow direction among the headers is displaced upstream in the air flow direction from a center position of an upstream-most row of the heat transfer tubes to which the upstream-most header is connected such that the upstream-most header is spaced apart from a row of the heat transfer tubes adjacent to the upstream-most row of the heat transfer tubes.

Abstract: A heat exchanger includes a heat transfer unit (HTU) including a heat transfer channel portion (HTCP) and auxiliary heat transfer portions (AHTPs). The HTCP and the AHTPs extend in a direction and are disposed in another direction being perpendicular to the direction. One of the AHTPs is an AHTP adjacent to the HTCP in another direction. When viewed from the direction, the AHTP is at an end of the HTU in another direction. A distance from the AHTP to the HTCP in another direction is defined as a length, in a case where the HTU further includes a plurality of HTCPs, the length is larger than a distance between adjacent ones of the HTCPs in another direction, and in a caser where the heat exchanger further includes a plurality of HTUs, the length is larger than a distance between the HTUs adjacent to each other in a direction different.

Abstract: A heat exchanger includes: heat transfer units that each comprise heat transfer channel portions and auxiliary heat transfer portions. The heat transfer channel portions and the auxiliary heat transfer portions extend in a first direction and are disposed in a second direction that intersects with or is perpendicular to the first direction. The heat transfer units are disposed in a third direction that is different from both of the first direction and the second direction. The heat transfer units each has an airflow-upstream region and an airflow-downstream region in the second direction. When the heat exchanger is used as an evaporator, the heat exchanger causes a refrigerant to flow into a heat transfer channel portion disposed in the airflow-upstream region, and then causes the refrigerant to flow out to a heat transfer channel portion disposed in the airflow-downstream region.

Abstract: A heat exchanger includes a heat-transfer-tube unit and a header. The heat-transfer-tube unit includes a fin and heat transfer tubes. The header is connected to the heat-transfer-tube unit. The fin and the heat transfer tubes are disposed, alternately, side by side, where the heat transfer tubes extend in a heat-transfer-tube-extending direction. The fin has sides that extend in the heat-transfer-tube-extending direction and that are joined to the heat transfer tubes. An end of the fin is disposed closer to a center of the heat-transfer-tube unit in the heat-transfer-tube-extending direction than ends of the heat transfer tubes, and the ends of the heat transfer tubes are inserted into holes disposed on the header.