MACHINE POUR PRÉPARER UNE BOISSON ET PROCÉDÉ DE PRÉPARATION D'UNE BOISSON UTILISANT UNE MACHINE DE LA SORTE

摘要

It comprises an infusion chamber (2) to house a dose of product and means to supply a liquid under pressure to said infusion chamber, said supply means comprising a distribution cylinder (4a) and piston (4b) assembly (4) which is disposed adjacent to said infusion chamber (2), said distribution piston (4b) defining inside the cylinder (4a) a chamber (5) to house said liquid, said distribution piston (4b) being capable of accumulating, in an active position, potential energy susceptible of being transmitted in the form of pressure to the liquid of said chamber (5), and it is characterized by comprising means (8, 8a, 8b, 9, 25) to inject liquid into the distribution cylinder (4b) chamber (5), said injection means (8, 8a, 8b, 9, 25) being configured so that the force exerted by the injected liquid on the distribution piston (4b) makes it possible to retract said piston (4b) to said active position, the same injected liquid being susceptible of being supplied under pressure to the infusion chamber (2) of the machine (1) for preparing the beverage, when said distribution piston (4b) recovers a resting position inside its cylinder (4a). The process comprises the stages of retracting the piston (4b) of the distribution cylinder (4a) or an element of said accumulator device, to its active position by the injection of a liquid from an independent storage reservoir (9), and supplying under pressure the liquid injected in stage a) whilst the piston (4b) of the distribution cylinder (4a) or the element of said accumulator device recovers a resting position. Fig. 1