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    • 77. 发明公开
    • EXHAUST GAS HEAT EXCHANGER HAVING STACKED FLAT TUBES
    • EP3404247A1
    • 2018-11-21
    • EP17738584.6
    • 2017-01-11
    • T.RAD Co., Ltd.
    • SUGIMOTO, HirohitoYAMAMOTO, Etsuo
    • F02M26/32F28D1/053F28D7/16F28F1/02F28F9/22
    • To suppress effectively, via a simple configuration, boiling inside a case in an exhaust gas heat exchanger having stacked flat tubes.
      An exhaust gas heat exchanger having stacked flat tubes includes a stacked tube body 3 configured by stacking a plurality of flat tubes 4 in multiple tiers with spaces therebetween and arranged inside a case 2; the exchanger configured such that
      exhaust gas flows in from one end part of the stacked tube body 3 in a tube axis direction, circulates through an inside of each flat tube 4, and flows out from the other end part; and
      cooling water introduced from a cooling water introduction part provided for the case 2 is supplied to the one end part to circulate along an exterior surface side of each flat tube 4, wherein:
      the cooling water introduction part 5 and 6 are provided in two locations for the case 2 and introduction directions of the cooling water from each of cooling water introduction parts 5 and 6 into the inside of the case 2 are set in mutually opposite directions; and wherein
      each of the introduction directions is parallel to a flat surface 4a of the flat tube 4 in the stacked tube body 3 and vertical in the axis direction of the flat tube 4.