Provided are a twisted tube-type heat exchanger and a method for manufacturing a twisted tube-type heat exchanger, with which a large-diameter tube and a small-diameter tube can be bonded without the use of flux The twisted tube-type heat exchanger comprises: a large-diameter tube having a spiral groove that is formed in a spiral shape in the axial direction on the surface of the tube; a small-diameter tube that has an outer diameter which is the same as or smaller than that of the spiral groove, and that is wound around the large-diameter tube along the spiral groove; and a metal layer that is formed on the surface of the small-diameter tube and that is made of a different material than the small-diameter tube and the large-diameter tube The spiral groove of the large-diameter tube and the surface of the small-diameter tube that faces the spiral groove are bonded via the metal layer that is fused by heating within a furnace

Twisted tube-type heat exchanger and method for manufacturing twisted tube-type heat exchanger

PROBLEM TO BE SOLVED: To provide a heat exchange device capable of reducing an amount of usage of a titanium-based metal material and having an excellent economical efficiency, in the heat exchange device in which a heat exchange container made of the titanium-based metal material is used as the heat exchange container in which a heat exchange object is accommodatedSOLUTION: The heat exchange device includes: a heat exchange container 10 made of a titanium-based metal material and for accommodating a heat exchange object; and heating medium circulation pipes 20 disposed so as to surround an outer peripheral surface of the heat exchange container and in which a heating medium circulates The heating medium circulation pipe is configured by being bonded to the heat exchange container via an aluminum-based metal material 30 as a joint material Also, in order to increase a heat transfer amount between the heating medium circulation pipe and the heat exchange container, an extension part of the aluminum-based metal material which is the joint material is provided in a region located between heating medium circulation pipes adjacent to each other on the outer peripheral surface of the heat exchange container Also, the whole region located between the heating medium circulation pipes adjacent to each other on the outer peripheral surface of the heat exchange container is coated by the aluminum-based metal material which is the joint material

Heat exchange device

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Heat exchange device