The invention is a throttle valve assembly.Two sides of the concave ring groove at the center of the bottom surface of the throttle valve are correspondingly provided with a first air inlet groove and a second air inlet groove.And connected to each other,And when the throttle valve turns,The first and second inlet slots can conduct a plurality of inlet holes in sequence.And when the first air inlet slot / the second air inlet slot is conductive to the last air inlet hole,The air inlet can also be guided to the second air inlet slot / the first air inlet slot.When the throttle valve is turned to the first air inlet,The first air inlet can be inflated immediately by the air inlet which has been directed to the second air inlet slot / the first air inlet slot.According to the innovative design of back pressure function,The first air inlet can be inflated in the shortest time.In order to add practical functions.本創作為一種節流閥組件，主要指節流閥之底面中央之凹環槽兩側對應設置第一進氣槽及第二進氣槽，且互相連通，並於節流閥轉動時，第一進氣槽及第二進氣槽能依序導通複數進氣孔，且第一進氣槽/第二進氣槽導通至最末進氣孔時，可使進氣也導流至第二進氣槽/第一進氣槽，致節流閥轉動至第一進氣孔開始進氣時，藉由已經導流至第二進氣槽/第一進氣槽之進氣可立即對第一進氣孔充氣，據此回壓功能的創新設計，使第一進氣孔能在最短時間內可進行充氣的作動，以俾增實用功能。
