Mixing unit and mixer tap comprising such a mixing unit

A mixing unit for a mixer tap, wherein the mixing unit has a generally cylindrical shape defining a main axis of the mixing unit, wherein the mixing unit comprises:

• a cartridge, comprising a mixing chamber, traversed by the main axis, wherein the mixing chamber comprises:
• a first intake of a first incoming stream of fluid having a first temperature,
• a second intake of a second incoming stream of fluid having a second temperature greater than the first temperature, and
• an outlet outside the mixing chamber for an outgoing stream of fluid,
• a mixer mixing the first and second incoming streams to form the outgoing stream, wherein the mixing means are contained in the mixing chamber;
• an additional casing extending out of the mixing chamber, wherein the additional casing is traversed by the main axis,
• a thermostatic unit mounted within the additional casing and comprises:
• a thermostatic element, which comprises both a thermosensitive portion disposed at least partially at the outlet, and a portion mobile in translation relative to the thermosensitive portion, and
• a shutter of the second intake, which is translationally connected to the portion mobile in translation,
• wherein the mixing unit comprises a single-piece common part which at least partially delimits the mixing chamber while forming at least a portion of the additional casing, wherein the common part forms a separation wall between the cartridge and the additional casing;
• wherein the separation wall extends in a plane that is orthogonal to the main axis, wherein the first intake, the second intake and the outlet are formed through the separation wall while being distributed about the main axis.