Bidirectional approaching top type smoke inlet detector and smoke inlet method thereof

The invention discloses a bidirectional approaching top type smoke entering detector, which mainly solves the problems that the smoke entering speed of the existing smoke sensing detector is slow, and the response alarm speed of the detector is slow. The smoke detector comprises an upper cover, a middle disc, a circuit board and a base, wherein the upper cover is buckled on the middle disc; the round table is buckled with the base, the bottom edge of the bowl-shaped smoke inlet area is flush with the top edge of the base after buckling is completed, and the whole detector is in a shape with the upper portion larger than the lower portion and the middle portion smaller; a plurality of smoke inlets are formed in the side wall of the smoke inlet area, and the circuit board is installed at the bottom of the inner side of the circular truncated cone. Through the design, the problems of low smoke inlet speed and non-uniform smoke inlet can be solved, smoke can repeatedly move in the smoke inlet area of the detector