Replaceable nozzle for producing a frothed liquid

A nozzle adaptable to the steam outlet of a coffee machine designed to froth a liquid comprising in the direction of the steam flow path:

• a steam inlet opening,
• a restriction with limited cross-section adapted to accelerate the velocity of the steam flow,
• at least one tubular portion defining a mixing cavity having a cross-section larger than the restriction and from which the frothed liquid is drained,
• wherein the nozzle furthermore comprises a conduit for the liquid or a liquid/air mixture, the conduit joining the steam flow path at the restriction or stream-upwards of the restriction, and
• the steam inlet opening, the restriction and the tubular portion are defined by two pieces which are horizontally partitioned and sealed with regard to the steam flow path.

A nozzle adaptable to the steam outlet of a coffee machine designed to froth a liquid comprising in the direction of the steam flow path:

• a steam inlet opening,
• a restriction with limited cross-section adapted to accelerate the velocity of the steam flow,
• at least one tubular portion of mixing cavity having a cross-section larger than the restriction and from which the frothed liquid is drained,
• wherein the nozzle furthermore comprises a conduit for the liquid or a liquid/air mixture, the conduit joining the steam flow path at the restriction or stream-upwards of the restriction, and
• the nozzle is made from a material which is selected such that it wears at regions where the steam from the steam inlet opening is impinging on it repeatedly such that the maximum number of use cycles of the nozzle is limited.