| 摘要 |
PROBLEM TO BE SOLVED: To provide a flow straightening device of a discharge port capable of reducing a manufacturing cost, at the same time, facilitating the assembly in the discharge port and preventing the clog caused by foreign matters. SOLUTION: An elastic metal strip bent in waves is further rolled up into a ring state to for a star-like flow straightening member 2, and the flow straightening member 2 is expanded by its elasticity and is held on the inside circumferential surface of the discharge port 1. A cylindrical member 3 of the same strip and having an approximately C-shaped cross section is fitted to the inside of the flow straightening member 2, and the cylindrical member 3 is expanded by the electricity and is held.
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