The utility model relates to a disposable differential pressure type breathing flow device.A fixed pipe is provided.The front part of the fixed pipeThe latter two segments are divided into a drainage segment and a connecting segment.In front of the connecting section,Two differential pressure measuring holes are arranged at the rear position.The connecting section of the fixed pipe is provided with a pluggable mouth pipe.A throttling piece is arranged in the mouth bit pipe.Fit the position of the two differential pressure measuring holes,In front of the throttling piece,After that, there are two pilot holes arranged around and corresponding to the two differential pressure measuring holes.The throttling piece is blocked between two rows of pilot holes；The throttling piece is formed in a disposable mouth bit pipe.The specification of throttling parts can be changed with different nozzles.A larger range of energy measurements,It is suitable for accurate measurement of respiratory flow and other data of users of various body types.一種一次性差壓式呼吸流量裝置，設有一固定管，該固定管的前、後兩段分為一引流段與一銜接段，在該銜接段的前、後位置設有兩壓差測量孔，在該固定管的銜接段安裝可插拔的口銜管，在口銜管內設有一節流件，配合兩壓差測量孔的位置，在節流件的前、後設有兩環繞排列且與兩壓差測量孔對應的導壓孔，該節流件阻隔在兩排導壓孔之間；本新型將節流件形成在一次性使用的口銜管內，使得節流件的規格可隨不同的口銜管變動，能量測更大的測量範圍，適合精確量測各種體型使用者的呼吸流量等數據。
