Beverage preparation apparatus comprising a mixing chamber

Abstract

The invention concerns a beverage preparation apparatus (), said apparatus comprising at least one chamber () for receiving and mixing an aqueous liquid and at least one soluble beverage ingredient, said chamber comprising: —a lateral side wall () comprising a liquid inlet (), —a bottom wall () comprising a beverage outlet (), and wherein the liquid inlet is positioned close to the bottom of the chamber, and wherein the liquid inlet is configured so that the liquid is introduced in the chamber as a straight jet of liquid, said introduced straight jet extending transversely through the internal volume of the chamber along a line L, said line L being offset relative to the longitudinal central axis (XX') of the chamber, wherein, at the area of the cylindrical lateral side wall opposed to the liquid inlet and crossed by the line L, the chamber comprises a bump () extending from the cylindrical lateral side wall inside the chamber, said bump presenting a shape designed: —to convert the introduced straight jet of liquid extending transversely through the internal volume of the chamber into a swirl flowing along the lateral side wall off the chamber, and —to reduce the diameter of the swirl rotating back to the bump and to guide said swirl in direction of the liquid inlet.