| 摘要 |
<p>Welding device consisting of a housing (1) to which a welding torch (3) is connected via a supply line (2). The housing comprises cooling means (4, 5, 6) which are formed by a compressor (4) which draws in outside air and is connected to a pressure line (5, 5a, 5b) which passes this air via a cooling unit (6) via the supply line (2) to the welding torch (3) and returns the air from the welding torch through the line (5b) via the supply line to a discharge means (7) which is arranged outside the supply line at some distance from the welding torch. The welding torch being provided with means (16) to assist the heat transfer from the welding torch to the cooling air. The cooling unit comprises a metal block (8) in which a duct (5) is provided and the opposite large lateral surfaces of said block are covered with Peltier elements, in such way that the cooling surface of each Peltier elements adjoins the metal block while the warm side of each Peltier element is covered with plates (10) comprising cooling ribs.
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