Referring to FIG. 2 and FIG. 4, when the external fluid 200 enters the one-way valve 130 from the first hole 111, the fluid 200 is guided by each stopper block 133 and flows into the main runner 131 and the corresponding shunt runner 132 respectively, and is shunted into a first fluid 210 and a second fluid 220. The first fluid 210 flows along the flat surface FS, and the second fluid 220 flows along the curved surface CS. After the first fluid 210 and the second fluid 220 passing through the corresponding stopper block 133, the first fluid 210 and the second fluid 220 collide with each other and converge in the main runner 131, so that the second fluid 220 generates a whirlpool in the main runner 131 after passing through the corresponding stopper block 133, and the fluid 200 loses flow energy after passing through each stopper block 133.

As the number of stopper blocks 133 passed through by the fluid 200 increases, the resistance experienced by the fluid 200 in the one-way valve 130 increases accordingly, thereby achieving the purpose of a one-way communication. As a side note, the one-way valve 130 in this case is suitable for the high-speed fluid 200. When the flow velocity exceeds a threshold value, the resistance of the fluid 200 entering the one-way valve 130 from the first hole 111 increases accordingly.