| 摘要 |
An improved boiler group is designed for use in machines for the preparation of espresso coffee that use pre-packed disposable quantities in the form of a capsule 1 or a pod 1a. The group 100, 200 includes: a heating element 10, 20 with high thermal capacity; a pressurized water supply channel 12, 22 for the preparation of said coffee, situated inside said heating element 10, 20 and opening outside in a position corresponding to an infusion area 15,25; means 30, 60 for locking said capsule 1 or pod 1 a, situated in a position corresponding to said infusion area 15, 25 and allowing the water to pass from said supply channel 12, 22 outlet towards said capsule 1 or pod 1 a, and also to convey the coffee going out from the latter towards an outlet channel 13, 23 and then towards a nozzle group. In the boiler group 100,200 the locking means 30, 60 are made move at least partially between a rest position A, A1, for allowing introduction of a capsule 1 or a pod 1 a, and an operative position B, B1, for enclosing hermetically and locking said capsule 1 or pod 1 a. The above mentioned movement is obtained by the action of the pressurized water used to make the coffee. |
