To provide an in-pipe air pressure adjustment mechanism suppressing air fed from a liquid feeding means from being mixed into a vessel when the liquid is fed from the liquid feeding means to a liquid storage vessel and quickly making the liquid stayed in a liquid introduction pipe flow down in the vessel.
In the liquid feeding system, the liquid fed from the liquid feeding means is stored in the liquid storage vessel. The in-pipe air pressure adjustment mechanism 30 for adjusting an air pressure in the liquid introduction pipe connected to the liquid storage vessel is provided with a liquid inlet part 34 positioned in an upstream side; a liquid outlet part 45 positioned in a downstream side; a cavity portion 46 formed between the liquid inlet part 34 and the liquid outlet part 45; and an air circulation port 35 capable of circulating air between the cavity portion 46 and the outside of the liquid introduction pipe.
FUJISAWA MASAHARU
MIYAZAWA MASAKI
TECHNO EXCEL CO LTD
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