Beverage preparation assembly

Process for the preparation of a beverage with a beverage preparation assembly comprising a container for storing a water soluble beverage powder, the container comprising a tank and a powder outlet, a dissolution chamber for preparing a beverage from the water soluble beverage powder and a diluent, the dissolution chamber comprising at last one diluent inlet and a beverage outlet, a chute for guiding the water soluble beverage powder from the powder outlet of the container to the dissolution chamber, an air outlet configured for evacuating air from the dissolution chamber, the powder outlet is connected to the chute by a conduit, the powder outlet, the conduit, the chute and the dissolution chamber are connected together through airtight connections, and the assembly comprises an air inlet, the air inlet being positioned above the chute only wherein the following steps are implemented:

• a dose of beverage powder is dispensed from the powder outlet of the container and delivered to the dissolution chamber through the chute;
• a dose of diluent is delivered in the dissolution chamber and mixed with the dose of powder to produce a beverage;
• the produced beverage is delivered through the chamber outlet;
• and
• during at least the second step air is sucked from the air outlet so that an unidirectional flow of air is created from the air inlet down to the bottom of the chute.