Interactive plate heat exchanger

The utility model relates to the technical field of plate heat exchangers. The interactive plate heat exchanger comprises a shell, plate heat exchanger, a square plate is arranged on the left side ofthe plate heat exchanger; an upper circular groove is correspondingly formed in the square plate and at the position of a hot fluid inlet pipe of the plate heat exchanger; an upper gate plate is arranged in the upper circular groove and located on the left side of the plate heat exchanger hot fluid inlet pipe. A groove is correspondingly formed in the top of the upper circular groove and in the position of the upper gate plate; a screw rod is rotatably connected to the top end of the upper gate plate and is positioned in the groove; upper gate plate, lower flashboard and circulation groove, the problems that an existing plate heat exchanger usually uses a manual control valve to control the speed of fluid entering the heat exchanger, the entering speed of hot fluid and the entering speed of cooling water cannot be