Title:
DOUBLE PIPE
Document Type and Number:
WIPO Patent Application WO/2018/043097
Kind Code:
A1
Abstract:
A double pipe (61) is provided with an inner pipe (62) inside of which a refrigerant flows, and an outer pipe (63) that has the inner pipe (62) in the interior thereof, the refrigerant flowing between the inner pipe (62) and the outer pipe (63). The inner pipe (62) has a pipe member (64) formed in the shape of a cylinder, and a helical member (65) disposed inside the pipe member (64). The helical member (65) has a helical part (66) that guides the flow of refrigerant flowing inside the inner pipe (62) into a helical shape, and a guide part (67) that is connected to a longitudinal-direction end (66a) of the helical part (66) and that guides the flow of the refrigerant flowing inside the inner pipe (62). The guide part (67) is formed so as to have less flow channel resistance than does the helical part (66).
Inventors:
YOSHIDA HIROYUKI (JP)
OONO HIROYUKI (JP)
OONO HIROYUKI (JP)
Application Number:
PCT/JP2017/029119
Publication Date:
March 08, 2018
Filing Date:
August 10, 2017
Export Citation:
Assignee:
CALSONIC KANSEI CORP (JP)
International Classes:
F16L55/00; F16L9/18; F16L53/00; F28D7/10; F28F1/40
Foreign References:
| JP2001353431A | 2001-12-25 | |||
| JP2009186063A | 2009-08-20 | |||
| JPS4835450U | 1973-04-27 | |||
| JPS49123657U | 1974-10-23 | |||
| JPS5965280U | 1984-05-01 | |||
| US4993485A | 1991-02-19 | |||
| JP2003314982A | 2003-11-06 | |||
| JPH0236783U | 1990-03-09 | |||
| JP2006234355A | 2006-09-07 |
Attorney, Agent or Firm:
GOTOH & PARTNERS (JP)
Download PDF: