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|1. (WO2018139162) HEAT EXCHANGER|
|Applicants:||MITSUBISHI ELECTRIC CORPORATION
In this heat exchanger, a plurality of planar fins having collar parts each extending from one surface into a tapered cylindrical shape are stacked, the collar parts of the fins adjacent to each other in the stacking direction are connected to one another so as to constitute a liquid passage tube, and a resin film is formed on the inner surface of the liquid passage tube. Inside the collar parts, second fins that are discontinuous in the peripheral direction of the collar parts are provided.