DOUBLE-TUBE INTERNAL HEAT EXCHANGER
    3.
    发明申请

    公开(公告)号:US20190353427A1

    公开(公告)日:2019-11-21

    申请号:US15983207

    申请日:2018-05-18

    发明人: Matthew JOHNSON

    IPC分类号: F28D7/10 F28F13/12

    摘要: A double-tube internal heat exchanger has an outer tube, an inner tube, and a turbulator. The inner tube is inserted into the outer tube and defines an inner flow channel therein through which a first fluid flows. The inner tube and the outer tube define an outer flow channel therebetween through which a second fluid flows. The turbulator is disposed inside the inner flow channel. The inner tube includes an inner surface defining an inner groove that helically extends on the inner tube along an axial direction of the inner tube. The turbulator includes a flexible core portion extending along the axial direction and loops protruding from the flexible core portion in a radial direction of the inner tube. Each of the inner tube and the outer tube includes a bent portion that is formed by bending both the inner tube and the outer tube together with the turbulator.