A dispensing machine (1) comprises a tank (2) for the products, a fan (19) housed in a housing (14) connected to the tank (2) and having an opening (15) for the passage of the products of the tank (2) to the fan (19), this opening (15) having upper and lower sides (27, 28) and first and second lateral sides (29, 30), the products passing through the opening (15) being moved by the fan (19) from the first side (29) to the second side (30), a plane (31) being horizontal and passing through an upper end (32) of the upper side (27), a plane (33) being vertical, parallel to the axis (24) of rotation of the fan (19) and passing through an end (34) of the second side (30) farthest horizontally from the axis (24), a mixing member (11) moving the products of the tank (2) towards the opening (15). According to the invention, a wall (36) of the housing (14) extends vertically from the plane (31) to the lower side (28) and horizontally from the plane (33) to the first side (29), until at an edge (37) connecting the second side (30) and the upper side (27) between them, and a distance (d) the shortest separating the axis (24) from a projection of this edge (37) on a plane (38) perpendicular to the axis (24) is less than or equal to 40% of the radius of the fan (19). Said wall (36) thus has a surface that limits the backflow to the tank (2) products moved by the fan (19). Une machine (1) de distribution comporte une cuve (2) pour les produits, un ventilateur (19) logé dans un carter (14) raccordé à la cuve (2) et comportant une ouverture (15) pour le passage des produits de la cuve (2) vers le ventilateur (19), cette ouverture (15) comportant des côtés supérieur et inférieur (27, 28) et des premier et deuxième côtés (29, 30) latéraux, les produits franchissant l'ouverture (15) étant déplacés par le ventilateur (19) du premier côté (29) vers le deuxième côté (30), un plan (31) étant horizontal et passant par une extrémité supérieure (32) du côté supérieur (27), un plan (3
