Patent ID: 7267160
Filing Date: 2007-09-11
Classification: C01B,F28D,F28F

Abstract:
1. A heat exchanger comprising: a core in the aggregate of a multiplicity of juxtaposed flat tubes, with a heating fluid flowing through one of the inside and the outside of the flat tubes, with a fluid to be heated flowing through the other; a pair of discoidal tube plates including tube insertion apertures to which the flat tubes are joined at their respective opposed ends; an inner cylinder having a rectangular cross-section enclosing the outer periphery of the core except the vicinities of the pair of tube plates; a first baffle plate having a circular periphery fitted to the outer periphery at one end of the inner cylinder, the first baffle plate confronting one of the pair of tube plates; a circular outer cylinder having one end joined to the first baffle plate and the other end joined to a second baffle plate with a circular periphery disposed on the outer periphery at the other end of the inner cylinder or to the other of the pair of tube plates, the outer cylinder including on its outer periphery a corrugated portion that is thermally expandable in the axial direction; and an outlet and an inlet for the fluid to be heated or the heating fluid disposed at the both end portions of the core between the opposed ends of the inner cylinder and the pair of tube plates, wherein a lead-in port and a lead-out port for the heating fluid or the fluid to be heated are connected respectively to the pair of tube plates.