Side-by-side Conduits With Fins Patents (Class 165/DIG500)
  • Patent number: 5769157
    Abstract: A heat exchanger for an air conditioner comprises 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.
    Type: Grant
    Filed: April 4, 1995
    Date of Patent: June 23, 1998
    Assignee: Mitsubishi Denki Kabushiki Kaisha
    Inventors: Kaoru Ikejima, Takashi Gotoh, Tsuneo Yumikura, Michimasa Takeshita, Takayuki Yoshida