Patent ID: 8425190

Claim:
A pressure relief device connected with an air control device and controlled by the air control device, comprising: a main body having at least one passage therein and two outlets formed at upper and lower ends of the passage a lid being pivotally connected to each of the two outlets via a pivot the pivot dividing the lid into two portions; the two portions of the lid being symmetrically provided with stop portions; the main body having an inner wall formed with recesses corresponding to the stop portions; at least two air control units each being disposed in the passage close to the lid; each of the air control units comprising at least one rotation restricting member, at least two first air control members, at least one second air control member and at least one third air control member; the at least one rotation restricting member being located within a rotation range of the lid; the at least two first air control members being disposed close to the two portions respectively and located at an edge of the rotation range of the lid; the at least two first air control members being connected with the air control device and controlled by the air control device to be engaged with the lid; each of the at least two first air control members including a stop member and an air bag, wherein the stop member having one end pivotally connected to an inner wall of the main body, the air bag being located between the stop member and the main body; the at least one second air control member being, an air duct, disposed at one side of the rotation restricting member and connected with the air control device; and the at least one third air control member being, an air duct, disposed at another side of the rotation restricting member opposite to the second air control member and connected to the air control device.