Title:
PRODUCTION OF HEAT EXCHANGER
Document Type and Number:
Japanese Patent JPS6289891
Kind Code:
A
Abstract:
PURPOSE:To easily produce a heat exchanger which has an increased surface area and transmits boiling heat satisfactorily by inserting anode bars into plural pieces of straight heat transmission pipes expanded and fixed to radiation fins, pouring a plating liquid into the pipes and subjecting the inside surfaces to rugged electroplating. CONSTITUTION:Plural pieces of the parallel straight heat transmission pipes 10 are expanded and the radiation fins 3 are fixed thereto. The anode bars 15 are then passed via an insulating cap 11 into the pipes 10 along the central axis thereof and further masking member 17 are provided to the ends 18 on the inside surfaces of the pipes 10. The plating liquid preferably added with an oxyethylene surface active agent and low-concn. chloride ions is poured into the pipes 10 and electric current is passed between the bars 15 and the pipes 10 from a DC power source 14. The inside surfaces of the pipes 10 are thereby subjected to the rugged electroplating 6. Both ends of a U-pipe 4 are inserted into the masking parts 18 at the ends of the parallel pipes 10 and are joined by brazing, by which the heat exchanger is formed.
Inventors:
INATANI MASATOSHI
NAKAMA HIROTO
NAKAMA HIROTO
Application Number:
JP23016485A
Publication Date:
April 24, 1987
Filing Date:
October 16, 1985
Export Citation:
Assignee:
MATSUSHITA REFRIGERATION
International Classes:
F28F1/42; B21D53/08; C25D5/16; C25D7/00; F28F9/26; (IPC1-7): B21D53/02; C25D7/00; F28F1/42; F28F9/26
Attorney, Agent or Firm:
Toshio Nakao
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