Humidifier

A humidifier, said humidifier comprising:

• a housing that extends along an axial direction, wherein
• the housing has a first inlet, a first outlet, a second inlet and a second outlet, and
• a membrane unit is arranged in the interior of the housing,
• the first inlet and the first outlet are in flow connection with each other via a first flow path,
• the second inlet and the second outlet are in flow connection with each other via a second flow path,
• the membrane unit is cylindrical and has a plurality of hollow fiber membranes arranged side by side,
• the membrane unit is outwardly surrounded at least in part by a first chamber,
• the first chamber is outwardly surrounded at least in part by a second chamber separate from the first chamber,
• the first chamber as a whole is in flow connection with the second chamber via one or more throttle slots,
• the membrane unit has a section with membrane potting at its axial ends in each case and the first chamber has a greater length along the axial direction than the second chamber,
• the first chamber extends along the membrane unit from the section with membrane potting at the first axial end to the section with membrane potting at the second axial end, and
• the first chamber forms a flow way extending axial along the membrane unit from the section with membrane potting at the first axial end to the section with membrane potting at the second axial end.