INTERMEDIATE HEADER

PROBLEM TO BE SOLVED: To improve physical mixture and thermal mixture, to uniformize temperature, and to perform uniform distribution of a flow rate by a method wherein an inlet pipe pair is opened to the inner lower part of a header body with a deflecting plate nipped therebetween, and an outlet pipe pair is opened at the inner upper part of the header body in a state to be positioned facing each other. SOLUTION: Inlet pipes 2 are arranged facing each other at the lower part of a cylindrical header body 1 with the inlet pipes inclined further downward than the direction of a central axis 7 of the header body 1. Outlet pipes 3 are arranged facing each other at the upper part of the header body 1. A plurality of deflecting plates 7a arranged in a state to further incline than the central axis 7 of the header body 1 and change the direction of a flow are provided in the header body 1. The deflecting plates 7a are formed in a shape that a plurality of small plates inclined at an angle with the central axis 7 of the header body 1 are arranged in parallel.