| 摘要 |
PROBLEM TO BE SOLVED: To provide a filter which is located in piping and can hardly be clogged.SOLUTION: In a filter, an annular member 4 which can be adhered to the inside of piping and a linear electric heating member 5 which partitions the internal opening of the annular member 4 in the shape of a mesh are provided. The quantity of heat per unit area of the internal opening generated from the electric heating member 5 positioned in the central region of the internal opening is larger than the quantity of heat per unit area generated from the electric heating member 5 positioned in a peripheral region outside the central region. |
