Micro-discharge disposition and beverage preparation machine with said micro-discharge disposition

A beverage discharge disposition adapted for frothing a liquid food product and adapted so that can be provided on the front region of a beverage preparation machine (20), said beverage discharge disposition comprising:

• a discharge casing (1) including a liquid food product circulation disposition (2) that presents an air valve disposition (10) adapted so as to regulate an air flow that is supplied downstream thereof, to a mixture of pressurized vapour flow and said liquid food product,
• wherein said air valve disposition (10) comprises:
• an ambient air admission,
• an air flow constrain element (19) adapted so as to provide variations of passageway section of ambient air flow,
• an air flux discharge wall (17) provided downstream of said air flow constrain element (19), and
• a discharge chamber provided upstream of said air flux discharge wall (17),
• whereby said air flux discharge wall (17) presents a single flow passageway (18) with a forma circular form and arranged centred relative to said discharge wall (17), with a characteristic passageway dimension that is at least one order of magnitude smaller than said characteristic dimension of the space downstream thereof,
• so that said air valve disposition (10) regulates the air flow that flows through said air flux discharge wall (17), preferentially through certain previously defined positions according to said liquid food product flux selection means (3) of said liquid food product.