COMBUSTION CHAMBER ASSEMBLY UNIT FOR A FUEL-OPERATED VEHICLE HEATER

A combustion chamber assembly unit for a fuel-operated vehicle heater includes a mixing chamber () extending in a direction of a combustion chamber assembly unit longitudinal axis (L) for generating an air/fuel mixture. A fuel feed device () feeds fuel to the mixing chamber () and a combustion air feed device feeds combustion air to the mixing chamber (). A diffuser device () is arranged downstream in relation to the mixing chamber () in the direction of the combustion chamber assembly unit longitudinal axis (L). The fuel feed device () includes an evaporator device (). The combustion air feed device () includes a swirling flow generation device (). The swirling flow generation device () is arranged with the evaporator device () upstream in relation to the mixing chamber () in the direction of the combustion chamber assembly unit longitudinal axis (L).