Heat Exchanger

A heat exchanger configured to perform heat exchange between a refrigerant circulating in a refrigeration cycle and outside air, the heat exchanger comprising:

• a plurality of tubes arranged in parallel and configured to allow the refrigerant to flow therethrough;
• a fin provided between adjacent tubes and configured to allow the outside air to pass therethrough, wherein the fin includes
• a plurality of contact portions alternately in contact with one and another of the adjacent tubes,
• a plurality of wall portions each connecting the contact portions adjacent to each other so as to connect the adjacent tubes,
• an extension portion extending from the contact portions and the wall portions and protruding upstream in a flow direction of the outside air from the tubes, and
• a plurality of louvers provided in each of the wall portions continuously along the flow direction of the outside air,
• each of the wall portions includes a flat plate portion formed in a flat plate shape, and arc portions each curved in an arc shape from the flat plate portion toward a corresponding one of the contact portions,
• the louvers include a first louver formed most upstream in the flow direction of the outside air in the extension portion, and a second louver formed downstream of the first louver in the flow direction of the outside air on a downstream side of an upstream end portion in the flow direction of the outside air in the tubes,
• the first louver and the second louver are formed at a same height throughout a height direction of the flat plate portion, and
• a downstream end portion of the first louver is located upstream of a tip end of each of the tubes in the flow direction of the outside air, and is formed at a same cut-and-raised height over a height direction of the downstream end portion.