| 摘要 |
In a droplet ejection head, each of droplet ejection units includes: a nozzle which ejects droplets of liquid, a pressure chamber which is filled with the liquid and connected to the nozzle, a drive element which applies pressure to the liquid inside the pressure chamber, and an individual supply channel and an individual recovery channel which are connected to the pressure chamber. The liquid is supplied to and recovered from the pressure chamber through the individual supply channel and the individual recovery channel. In each of the droplet ejection units, a diameter Dn (mum) of the nozzle, a flow channel resistance R1 (Ns/m5) of the individual supply channel and a flow channel resistance R2 (Ns/m5) of the individual recovery channel satisfy: 3.247×1015exp(-0.1717 Dn)@R1@3.278×1015exp(-0.1456 Dn); and 3.247×1015exp(-0.1717 Dn)@R2@3.278×1015exp(-0.1456 Dn).
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