Gas generator, airbag module, vehicle safety system and method for purifying a pyrotechnically produced gas

A pyrotechnical tube gas generator (10) with an axial longitudinal direction (L), comprising an ignition unit (20), a combustion chamber (30) mounted axially downstream of the ignition unit (20) comprising a combustion chamber bottom (35), and a filter chamber (70) that is mounted axially downstream of the combustion chamber (30), wherein in the filter chamber (70) a plate labyrinth filter system (150) is formed, the plate labyrinth filter system (150) including at least two plates (151, 152) positioned axially downstream of each other, wherein the at least two plates (151, 152) are aligned substantially perpendicularly to the axial longitudinal direction (L) of the gas generator (10) and substantially in parallel to the combustion chamber bottom (35), and wherein each of the at least two plates (151, 152) has at least one through-opening, the through-openings of adjacent ones of the at least two plates (151, 152) being arranged to be offset against each other in the radial direction, wherein the combustion chamber bottom (35) comprises a combustion chamber outlet (36) comprising at least one opening in the combustion chamber bottom (35), wherein all of the through-openings of a first plate (151) of the plate labyrinth filter system (150) arranged to be first in the axial longitudinal direction (L) being formed between the first plate (151) and an inner face (72) of a filter chamber outer casing (71).