Device for the generative production of a three-dimensional object

An exhaust device for an apparatus for the generative production of a three-dimensional object by successive, selective layer-by-layer solidification of construction material layers of a solidifiable construction material with at least one energy beam, the apparatus comprising at least one device for producing at least one energy beam for layer-by-layer selective solidification of individual construction material layers of a solidifiable construction material, wherein the device is configured to generate an energy beam directed directly onto a construction plane, wherein the exhaust device is configured to exhaust non-solidified construction material detached from the construction plane during processing and/or process gases arising during processing, and wherein

• the exhaust device comprises at least one exhaust element through which a suction flow may or does flow, wherein the at least one exhaust element comprises an inner flow chamber defining a flow channel for the suction flow and at least one passage opening leading into the inner flow chamber and extending through a longitudinal extent of the at least one exhaust element, wherein the at least one passage opening is formed in the at least one exhaust element for passage of an energy beam generated by a device in the apparatus and directed directly onto the construction plane perpendicular to the longitudinal extent of the at least one exhaust element.