GVV valve pressure maintaining structure and GVV valve

The invention discloses a GVV valve pressure maintaining structure comprising a vertically arranged pressure maintaining barrel. A cavity is formed in the pressure maintaining barrel. An air inlet communicating with the cavity is formed in the bottom of the pressure maintaining barrel. An exhaust opening communicating with the cavity is formed in the side of the pressure maintaining barrel. The top edge of the air inlet extends upwards to form a boss. A ventilation notch is formed in the boss. At least one ventilation groove is formed in the inner wall of the pressure maintaining barrel. A movable part capable of moving up and down is arranged in the cavity and is used for controlling the airflow quantity between the air inlet and the exhaust opening. High-pressure pressure control can beachieved through the pressure maintaining structure, the pressure maintaining structure of the GVV valve is arranged laterally, the height of a valve body is lowered, space is saved, and the pressuremaintaining structure can