| abstract |
(57) [Summary] [Purpose] To improve heat exchange efficiency, pressure resistance and productivity. [Structure] The refrigerant flow pipe for heat exchanger T5 is composed of flat upper and lower walls 1 and 2, and a plurality of reinforcing walls 39 extending over the upper and lower walls 1 and 2 and extending in the longitudinal direction at predetermined intervals. And a flat aluminum pipe 5 having parallel refrigerant passages 4 therein, and a plurality of communication holes 40 for allowing the parallel refrigerant passages 4 to pass through the reinforcing wall 39. 5, as the hollow portion is brought formed by upper and lower two aluminum plates 37 and 38, the lower a Both edges of the aluminum plate 38 are bent in an arc shape and are flat. Forced formed by being brought butt joining both side edges of the aluminum plate 37 of the upper, reinforced wall, the inner ridge from the lower wall 2 The protrusions 39a, which are integrally formed in a raised shape, are formed by being joined to the inner surface of the flat upper wall 1, and the communication holes 40 have the notches formed at predetermined intervals on the edges of the protrusions 39a. The upper wall 1 is formed by closing the opening. |