Heat exchanger, air-conditioning apparatus equipped with heat exchanger, and method of manufacturing heat exchanger

A heat exchanger comprising:

• a plurality of flat heat transfer tubes each having refrigerant flow passages formed therein and allowing refrigerant to flow therethrough, the plurality of flat heat transfer tubes extending in an up-down direction that is a tube extending direction, the plurality of flat heat transfer tubes being spaced apart from each other in a lateral direction perpendicular to the up-down direction and a front-rear direction that is an flow direction of air, and being also arranged in two rows in the front-rear direction;
• and
• corrugated fins each of which is provided between associated adjacent ones of the flat heat transfer tubes in the two rows that are adjacent to each other in the lateral direction, each of which is joined to the associated adjacent ones of the flat heat transfer tubes in the two rows, from top to bottom in the up-down direction, and each of which has a protruding portion that protrudes forward relative to front-side end portions of the associated adjacent ones of the flat heat transfer tubes in the front-side row,
• wherein
• a position of a front-side end portion of each of the corrugated fins is unchanged from top to bottom in the up-down direction,
• a position of the front-side end portion of each of the flat heat transfer tubes in the front-side row is not unchanged from top to bottom in the up-down direction, and
• a length of the protruding portion in the front-rear direction is not unchanged from top to bottom in the up-down direction.