A dehumidifier for a gaseous medium, comprising: a cooling unit for cooling the gaseous medium; and a condensate tray for collecting condensation water condensed from the gaseous medium; wherein the cooling unit is arranged in heat-conductive connection to the condensate tray for cooling the condensate tray in such a way that water contained in the gaseous medium condenses on the inner sides of the condensate tray to form the condensation water; wherein a hood is provided which covers the condensate tray and comprises an inlet opening and an outlet opening for the gaseous medium and comprises at least one flow guiding element (136, 138) for guiding the gaseous medium under the hood along the inner sides of the edge and the base plate of the condensate tray, characterized in that the inlet opening in the hood is arranged such that, when the hood is arranged above the condensate tray, the gaseous medium enters the interior of the condensate tray at least at one location in the region of the edge of the condensate tray; and a first flow guiding element in the form of a first web is fastened to the hood in such a manner that, when the hood is arranged above the condensate tray, it projects into the condensate tray at least approximately parallel to the edge of the condensate tray, at a small distance therefrom, for guiding the flow of the gaseous medium entering under the hood through the inlet opening along the inner sides of the edge of the condensate tray in the direction towards the bottom plate, that a second flow guiding element in the form of a second web, which runs substantially parallel to the first web, is fastened to the hood to be offset further towards the center of the hood and the condensate tray, that the first and second webs (136, 138) are spaced apart from the base plate when the hood is arranged above the condensate drip tray, that the first and second webs (136, 138) are arranged on the flow path of the gaseous medium between the inlet opening and the outlet opening, and in that the outlet opening comprises a lamella grid in which the lamellae are arranged parallel to each other and inclined at an acute angle α with respect to the bottom plate so that the acute angle opens toward the first and second webs (136, 138). a cooling unit for cooling the gaseous medium; and a condensate tray for collecting condensation water condensed from the gaseous medium; wherein the cooling unit is arranged in heat-conductive connection to the condensate tray for cooling the condensate tray in such a way that water contained in the gaseous medium condenses on the inner sides of the condensate tray to form the condensation water; wherein a hood is provided which covers the condensate tray and comprises an inlet opening and an outlet opening for the gaseous medium and comprises at least one flow guiding element (136, 138) for guiding the gaseous medium under the hood along the inner sides of the edge and the base plate of the condensate tray, characterized in that the inlet opening in the hood is arranged such that, when the hood is arranged above the condensate tray, the gaseous medium enters the interior of the condensate tray at least at one location in the region of the edge of the condensate tray; and a first flow guiding element in the form of a first web is fastened to the hood in such a manner that, when the hood is arranged above the condensate tray, it projects into the condensate tray at least approximately parallel to the edge of the condensate tray, at a small distance therefrom, for guiding the flow of the gaseous medium entering under the hood through the inlet opening along the inner sides of the edge of the condensate tray in the direction towards the bottom plate, that a second flow guiding element in the form of a second web, which runs substantially parallel to the first web, is fastened to the hood to be offset further towards the center of the hood and the condensate tray, that the first and second webs (136, 138) are spaced apart from the base plate when the hood is arranged above the condensate drip tray, that the first and second webs (136, 138) are arranged on the flow path of the gaseous medium between the inlet opening and the outlet opening, and in that the outlet opening comprises a lamella grid in which the lamellae are arranged parallel to each other and inclined at an acute angle α with respect to the bottom plate so that the acute angle opens toward the first and second webs (136, 138).