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Title:
TWISTED TUBE-TYPE HEAT EXCHANGER AND METHOD FOR MANUFACTURING TWISTED TUBE-TYPE HEAT EXCHANGER
Document Type and Number:
WIPO Patent Application WO/2017/141307
Kind Code:
A1
Abstract:
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.

Inventors:
AZUMA MASAAKI (JP)
Application Number:
PCT/JP2016/054264
Publication Date:
August 24, 2017
Filing Date:
February 15, 2016
Export Citation:
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Assignee:
MITSUBISHI ELECTRIC CORP (JP)
International Classes:
F28D7/02; B23K1/00; B23K1/008
Foreign References:
JP2010091266A2010-04-22
JPH08238564A1996-09-17
JPH09174235A1997-07-08
JPH11114667A1999-04-27
JP2003161587A2003-06-06
JP2007185709A2007-07-26
JP2015081760A2015-04-27
JP2009047394A2009-03-05
JP2011122797A2011-06-23
JP2015001328A2015-01-05
JP2015158339A2015-09-03
Attorney, Agent or Firm:
KISA PATENT & TRADEMARK FIRM (JP)
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