A heat-exchanger unit, comprising: a heat exchanger (50, 250, 350); a fan configured to supply air to the heat exchanger (50, 250, 350); and a vortex generator located upstream of the heat exchanger (50, 250, 350) in a direction in which the air flows and configured to generate a vortex flow of the air, the heat exchanger (50, 250, 350) being provided with a first heat-exchanger section that includes a plurality of heat transfer parts (10, 10a, 10b, 10c) that are arranged at intervals in a first direction; and a second heat-exchanger section (52, 352) that includes a plurality of heat transfer parts (10, 10a, 10b, 10c, 310) that are arranged at intervals in the first direction, the first heat-exchanger section being located closer to the vortex generator than is the second heat-exchanger section (52, 352), characterized in that each of the intervals in the first direction between the plurality of heat transfer parts (10, 10a, 10b, 10c) of the first heat-exchanger section being greater than each of the intervals in the first direction between the plurality of heat transfer parts (10, 10a, 10b, 10c, 310) of the second heat-exchanger section (52, 352), the plurality of heat transfer parts (10, 10a, 10b, 10c, 310) being each provided with a refrigerant passage portion through which refrigerant flows inside the refrigerant passage portion in a second direction that intersects the first direction, and a fin portion (30, 30a, 330) that extends from the refrigerant passage portion toward the vortex generator, where a virtual line passes through a center of a width of the refrigerant passage portion in the first direction and extends in a third direction that is orthogonal to the first direction and the second direction, the fin portion (30, 30a, 30b, 330) overlapping with the virtual line in position. a heat exchanger (50, 250, 350); a fan configured to supply air to the heat exchanger (50, 250, 350); and a vortex generator located upstream of the heat exchanger (50, 250, 350) in a direction in which the air flows and configured to generate a vortex flow of the air, the heat exchanger (50, 250, 350) being provided with a first heat-exchanger section that includes a plurality of heat transfer parts (10, 10a, 10b, 10c) that are arranged at intervals in a first direction; and a second heat-exchanger section (52, 352) that includes a plurality of heat transfer parts (10, 10a, 10b, 10c, 310) that are arranged at intervals in the first direction, the first heat-exchanger section being located closer to the vortex generator than is the second heat-exchanger section (52, 352), characterized in that each of the intervals in the first direction between the plurality of heat transfer parts (10, 10a, 10b, 10c) of the first heat-exchanger section being greater than each of the intervals in the first direction between the plurality of heat transfer parts (10, 10a, 10b, 10c, 310) of the second heat-exchanger section (52, 352), the plurality of heat transfer parts (10, 10a, 10b, 10c, 310) being each provided with a refrigerant passage portion through which refrigerant flows inside the refrigerant passage portion in a second direction that intersects the first direction, and a fin portion (30, 30a, 330) that extends from the refrigerant passage portion toward the vortex generator, where a virtual line passes through a center of a width of the refrigerant passage portion in the first direction and extends in a third direction that is orthogonal to the first direction and the second direction, the fin portion (30, 30a, 30b, 330) overlapping with the virtual line in position.