HEAT TRANSFER TUBE, HEAT EXCHANGER, HEAT SOURCE UNIT, AND MANUFACTURING METHOD FOR HEAT TRANSFER TUBE

摘要

Provided is a heat transfer tube that improves heat transfer efficiency and makes molding work easier during manufacturing.　A heat transfer tube (8) according to this disclosure has a pair of plate-like heat transfer tube parts (12) joined together to form refrigerant flow passages (9). Each of the heat transfer tube parts (12) has: a first region (14) in which a plurality of protrusions (13) protrude from a surface (12a) and extend along the surface (12a), the protrusions being arranged spaced apart from one another; and a second region (15) that is disposed adjacent to the first region (14) on one side in the arrangement direction of the protrusions (13) and in which the protrusions (13) are not provided. The pair of heat transfer tube parts (12) are disposed such that: protruding-direction tip end surfaces (13a) of the respective protrusions (13) are opposed and joined together to form the refrigerant flow passages (9), between the protrusions (13) that are adjacent, along the direction in which the protrusions (13) extend; and the second region (15) of one of the pair and the second region (15) of the other of the pair are positioned mutually on the opposite sides with respect to the respective first regions (14).