Coffee brewing apparatus, has isolation unit including valve to cause abrupt relaxation of compressed air in water reservoir and air flow along pressure curve until end of infusion cycle during inactive state of pressurization unit

摘要

The apparatus has a pressurization unit (11) connected to a compression chamber (18), which is arranged between the pressurization unit and a water reservoir (10). The chamber includes an isolation unit placed between an inlet and an outlet. The isolation unit at the inlet is subordinated to a state of the pressurization unit. The isolation unit at the outlet includes an electromagnetic valve (12) to cause abrupt relaxation of compressed air in the reservoir and consecutive air flow along a pressure curve until an end of an infusion cycle during an inactive state of the pressurization unit.