The invention relates to an integrated device for automobile fuel steam
desorption. The integrated device comprises a venturi tube, a venturi structure, a mounting end, a mounting through tube, a
positive pressure valve plate, a mounting end tube, a
branch and a negative pressure valve plate. The venturi structure is positioned in the venturi tube, and the mounting end, the mounting through tube and the mounting end tube are communicated with the venturi tube to form a tee joint; one end of the
branch is connected with the mounting end tube, the other end of the
branch is connected with the venturi tube, and a cavity is formed in one end of the venturi tube and one end of the venturi structure and is communicated with the mounting end and the branch, wherein the
positive pressure valve plate is arranged in the mounting through tube, and the negative pressure valve plate is arranged in the branch. By arranging the integrated device integrating
positive pressure desorption and negative pressure
desorption, free switching between the positive pressure desorption and the negative pressure desorption of fuel steam is achieved, and the number of parts and the occupied space are reduced. And meanwhile, the nested and detachable venturi structures are arranged, so that the combined installation and free replacement of the venturi structures are realized, and the production,
processing, maintenance and replacement processes are more convenient.