Milk Frothing Device Equipped With A Calibrated Air Passage

The milk frothing device includes a mixing part having a mixing chamber, a hot water/vapor inlet orifice and a main flow conduit connecting the hot water/vapor inlet orifice to the mixing chamber; a closure part movable relative to the mixing part between a closed position in which the closure part closes the mixing chamber and the main flow conduit and an open position in which the mixing chamber and the main flow conduit are open; a milk supply conduit and an air supply conduit connected to the main flow conduit; and a seal extending around the mixing chamber and the main flow conduit.