| 摘要 |
PROBLEM TO BE SOLVED: To maintain stable loading conditions even in a large-sized container by forming a capillary force generator at a partition wall extended upward from a communication passage of a negative pressure generator material containing chamber, and setting the force of the generator to a range of the condition of a specific formula. SOLUTION: Capillary force generated by a capillary force generator satisfies a condition of at least a formula: H<h<=Hs-Hp-Δh, where h=ΔPc/ρg when generated capillary force isΔPc, H is a difference between potential heads of the capillary force generating part and a liquid injection head discharge port forming surface, Hs=ΔPs/ρg when the capillary force of a negative pressure generating member isΔPs, and Hp is a difference between potential heads of a gas-liquid interface in the negative pressure generating member and the capillary force generating part. And,Δh=ΔPe/ρg when a loss head converted to dimension of a length from pressure loss at the negative pressure generating member between a communication passage and a discharge liquid supply port by a product of densityρand gravity acceleration (g), i.e., pressure loss isΔPe. |
