Robotic vacuum cleaner (1, 1') for autonomous cleaning of floor surfaces of a room, comprising - a housing (2, 2') which delimits an interior, - a container arranged in the interior of the housing (2, 2') for receiving dirt particles, - a fan for generating a suction air flow, - at least one suction mouth arranged on the housing (2, 2') and - a suction channel which fluidically connects the suction mouth to the fan with the container interposed between them, wherein dirt particles can be picked up at the suction mouth under the effect of the suction air flow and conveyed to the container by means of the suction channel, wherein a secondary air channel (10, 10') leads suction opening (11, 11') arranged in a region of an outer edge of the housing, wherein the secondary air channel (10, 10') is fluidically connected to the fan with the container interposed between them, so that the suction air flow generated by means of the fan acts not only on the suction mouth of the suction channel but also on the suction opening (11, 11') of the secondary air channel (10, 10') and in this way dirt particles can be picked up at the suction opening (11, 11') of the secondary air channel (10, 10') under the effect of the suction air flow and conveyed directly or indirectly to the container by means of the secondary air channel (10, 10'), characterised by an adjusting device comprising at least one adjusting element and an adjusting drive, wherein by means of the adjusting element a flow cross-section of the suction channel and/or a flow cross-section (18, 18') of the secondary air channel (10, 10') can be closed and/or opened at least partially, preferably completely. - a housing (2, 2') which delimits an interior, - a container arranged in the interior of the housing (2, 2') for receiving dirt particles, - a fan for generating a suction air flow, - at least one suction mouth arranged on the housing (2, 2') and - a suction channel which fluidically connects the suction mouth to the fan with the container interposed between them, wherein dirt particles can be picked up at the suction mouth under the effect of the suction air flow and conveyed to the container by means of the suction channel, wherein a secondary air channel (10, 10') leads suction opening (11, 11') arranged in a region of an outer edge of the housing, wherein the secondary air channel (10, 10') is fluidically connected to the fan with the container interposed between them, so that the suction air flow generated by means of the fan acts not only on the suction mouth of the suction channel but also on the suction opening (11, 11') of the secondary air channel (10, 10') and in this way dirt particles can be picked up at the suction opening (11, 11') of the secondary air channel (10, 10') under the effect of the suction air flow and conveyed directly or indirectly to the container by means of the secondary air channel (10, 10'), characterised by an adjusting device comprising at least one adjusting element and an adjusting drive, wherein by means of the adjusting element a flow cross-section of the suction channel and/or a flow cross-section (18, 18') of the secondary air channel (10, 10') can be closed and/or opened at least partially, preferably completely.