Title:
DOUBLE TUBE
Document Type and Number:
Japanese Patent JP2018035911
Kind Code:
A
Abstract:
PROBLEM TO BE SOLVED: To provide a double tube capable of avoiding increase of local flow passage resistance to efficiently circulate fluid inside the double tube, and further improving heat exchange efficiency between fluid flowing inside an inner tube and fluid flowing outside the inner tube.SOLUTION: A double tube 61 includes an inner tube 62 in which refrigerant flows, and an outer tube 63 which has the inner tube 62 therein and where refrigerant flows between itself and the inner tube 62. The inner tube 62 has a tube member 64 formed into a cylindrical shape, and a spiral member 65 arranged inside the tube member 64. The spiral member 65 has a spiral part 66 configured to guide the flow of refrigerant, flowing inside the inner tube 62, in a spiral manner, and a guide part 67 connected to a longitudinal end part 66a of the spiral part 66 and configured to guide the flow of refrigerant flowing inside the inner tube 62. The guide part 67 is formed so that flow passage resistance is made smaller than that of the spiral part 66.SELECTED DRAWING: Figure 2
Inventors:
YOSHIDA HIROYUKI
ONO HIROYUKI
ONO HIROYUKI
Application Number:
JP2016171481A
Publication Date:
March 08, 2018
Filing Date:
September 02, 2016
Export Citation:
Assignee:
CALSONIC KANSEI CORP
International Classes:
F16L55/00; F16L9/18; F16L53/00; F28D7/10; F28F1/40
Attorney, Agent or Firm:
Goto Patent Office
Masaki Goto
Masaaki Iida
Masaki Goto
Masaaki Iida
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