Metal working – Method of mechanical manufacture – Rocket or jet device making
Patent
1996-06-06
1998-10-20
Cuda, Irene
Metal working
Method of mechanical manufacture
Rocket or jet device making
29890054, B23P 1526
Patent
active
058228543
ABSTRACT:
A heat exchanger for an air conditioner includes a plurality of heat-transfer tubes arranged in parallel to each other at predetermined intervals, and heat-transfer fins formed by helically winding a plurality of fine wires around the plurality of heat-transfer tubes. Preferably, the heat-transfer tubes are divided into groups of two adjacent heat-transfer tubes (1a, 1b), (1b, 1c), (1c, 1d), . . . , and at least one fine wire fin is wound helically around the two adjacent heat-transfer tubes of each group so that the fine wire fin does not cross other portions of the fine wire fin as viewed along a direction perpendicular to a plane including the axes of the plurality of heat-transfer tubes. When fabricating the heat exchanger, at least either the outer circumferences of the heat-transfer tubes or the outer circumferences of the fine wires are coated with a metal film formed by plating, and then the heat-transfer tubes and the fine wires are interlaced to form a heat exchanging structure. Then, the heat exchanging structure is heated to the melting point of the metal film so that the metal film is melted and the heat-transfer tubes and the fine wires are bonded together by the molten metal film.
REFERENCES:
patent: 2500501 (1950-03-01), Trumpler
patent: 2588500 (1952-03-01), Dugan
patent: 2620170 (1952-12-01), Brickman
patent: 2952906 (1960-09-01), Singleton
patent: 3217392 (1965-11-01), Roffelsen
patent: 3689941 (1972-09-01), Chartet
patent: 4056143 (1977-11-01), Martin
Gotoh Takashi
Ikejima Kaoru
Takeshita Michimasa
Yoshida Takayuki
Yumikura Tsuneo
Cuda Irene
Mitsubishi Denki & Kabushiki Kaisha
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