Patent ID: 8469780

Claim:
A reverse oblique air curtain exhaust cabinet, comprising: a cabinet, having a top plate, a bottom plate, a left lateral plate, a right lateral plate, a front plate, and a rear plate, where above plates define a space, and an opening is provided at the lower part of the front plate of the cabinet; an elongate air blow device, having an elongate air blow slot that is located in front of the bottom plate of the cabinet and through which air is blown upward at an oblique angle toward the rear plate of the cabinet; and an air-extraction hood, located in the space of the cabinet in a way of being vertically movable relative to the cabinet and including an elongate air-extraction part that has an elongate opening facing downward and is connected with an air-extraction machine, where the elongate opening is parallel to the elongate air blow slot in a way that the elongate air-extraction part is above and spaced from the elongate air blow slot toward the rear plate of the cabinet, so that an oblique air curtain that is two-dimensional is formed between the elongate air-extraction part and the elongate air blow slot when the air-extraction machine is operated; wherein the air-extraction hood includes a flange that is extended outward from the peripheries of the elongate air-extraction part; the flange's front end and rear end are respectively provided with a rail; the front plate and the rear plate are respectively provided with a track for being connected with a corresponding rail, so that the air-extraction hood is vertically movable in the space.