Title:
BENDING WORK METHOD FOR HEAT EXCHANGER AND HEAT EXCHANGER
Document Type and Number:
WIPO Patent Application WO/2012/014769
Kind Code:
A1
Abstract:
A bending work method for a heat exchanger performs a bending work in such a way that a plate-shaped heat exchanger is pushed to a bender so as to be wound around the bender, the heat exchanger being disposed such that part of a heat-transfer fin is projected in a direction orthogonal to the longitudinal direction of a heat-transfer pipe. In the bending work method, the projecting portion of the heat-transfer fin can be prevented from being bent and broken. In the bending work method for an outdoor heat exchanger (7), a bender (55) having a curved surface (58), the bend radius of which changes so as to become smaller from the start point to the end point of the bending work for the outdoor heat exchanger (7), is employed. The curved surface (58) has a first curved surface (61) positioned near the start point and having a large bend radius and a main curved surface (62) positioned near the end point and having a bend radius smaller than that of the first curved surface (61). In this bending work method, at the start of the bending work, a first step is carried out in which the projecting portion of a heat-transfer fin (21) is pushed to the first curved surface (61). After the first step, a main step is carried out in which the projecting portion of the heat-transfer fin (21) is pushed to the main curved surface (62).
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Inventors:
FUJIWARA, Akihiro (Sakai Plant DAIKIN INDUSTRIES, LTD., 1304, Kanaoka-cho, Kita-ku, Sakai-sh, Osaka 11, 〒5918511, JP)
Application Number:
JP2011/066538
Publication Date:
February 02, 2012
Filing Date:
July 21, 2011
Export Citation:
Assignee:
DAIKIN INDUSTRIES, LTD. (Umeda Center Building, 4-12 Nakazaki-Nishi 2-Chome, Kita-ku, Osaka-sh, Osaka 23, 〒5308323, JP)
ダイキン工業株式会社 (〒23 大阪府大阪市北区中崎西２丁目４番１２号梅田センタービル Osaka, 〒5308323, JP)
ダイキン工業株式会社 (〒23 大阪府大阪市北区中崎西２丁目４番１２号梅田センタービル Osaka, 〒5308323, JP)
International Classes:
B21D53/08; B21D7/024; F28F1/32
Attorney, Agent or Firm:
SHINJYU GLOBAL IP (South Forest Bldg, 1-4-19 Minamimori-machi, Kita-ku, Osaka-sh, Osaka 54, 〒5300054, JP)
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Claims: