Patent ID: 6939518

Claim:
A purifier to purify exhaust gas, comprising: (a) a case having an inlet and an outlet; (b) a plurality of thin plates disposed in said case, said thin plates being arranged at predetermined intervals, and each of said thin plates having at least one through-hole; (c) a catalyst held to each of said thin plates; said catalyst having a function of purifying the exhaust gas; (d) partition plates disposed between the respective thin plates, said partition plates partitioning the spaces between the respective thin plates; (e) a plurality of U-shaped catalyst heaters are disposed through said plurality of thin plates so that each of said catalyst heaters goes through each of said spaces partitioned by said partition plates, each of said catalyst heaters for heating each of said thin plates, and (f) an external radiation fin, wherein at least two out of said catalyst heaters have a U-shaped bend portion and straight portions formed at either end of the bend portion; each of said straight portions is disposed piercing through said thin plates; said bend portion is located outside said case; and said external radiation fin is installed at said bend portion, the exhaust gas enters into said case from said inlet, and passes through the spaces formed between the respective thin plates, and each of said through-holes, and is exhausted from said outlet.