Cold trap for vapor-containing gas, especially for reflow welding unit filters, comprises heat exchanger fitted with control valve, allowing direction of gas flow through it to be reversed

摘要

Cold trap for vapor-containing gas comprises a heat exchanger (1) which is fitted with a control valve (2), allowing the direction of gas flow through it to be reversed. An independent claim is included for a process gas filter for a reflow welding unit which is fitted with the cold trap.