Fuente: WIPO "tomato" The invention relates to a chemical mixing vent (6) for use in foam washing and rinsing devices (100) comprising at least one air inlet (2), a water inlet (3) connected to a clean water source, a white water transportation line (11) and a rinsing water transportation line (10), characterized in that it comprises a mixing chamber (6.3), a water inlet (6.1) having a wide angle inlet path (6.4) for inletting water into said mixing chamber (6.3), and a foam outlet (6.2) having a narrow angle outlet path (6.5) for conveying foam formed as a result of chemical mixing with water in said mixing chamber (6.3) to the white water transportation line (11).