Liquid ejecting head, liquid ejecting unit, and liquid ejecting apparatus

Abstract

The invention provides a liquid ejecting head including a circulation path which has a more uniform ejection property, a liquid ejecting unit including the corresponding liquid ejecting head, and a liquid ejecting apparatus. The liquid ejecting head comprises: a plurality of nozzle openings that eject a liquid; a first flow path that is communicated with the plurality of nozzle openings and in which the liquid is circulated; a supply path that supplies the liquid to the first flow path from an outside; a recovery path that recovers the liquid from the first flow path to the outside; a first filter that is provided in the supply path; a second filter that is provided in the recovery path; and a second flow path that connects the supply path provided in an upstream side of the first filter and the recovery path provided in downstream side of the second filter, wherein a recovery side flow path between the first flow path and the second flow path of the recovery path has a flow path resistance which is lower than flow path resistance of the supply side flow path between the first flow path and the second flow path of the supply path. The liquid ejecting head unit and the liquid ejecting apparatus comprise the liquid ejecting head.

Description

technical field [0001] The present invention relates to a liquid ejecting head, a liquid ejecting unit, and a liquid ejecting device. Background technique [0002] Conventionally, in an ink jet recording apparatus, which is an example of a liquid ejecting apparatus, there is known a circulation type in which an ink tank is provided separately from the ink jet recording head, and ink is circulated between the ink tank and the ink jet recording head. of ink jet recording devices. (For example, refer to Patent Document 1). [0003] In the ink jet recording apparatus described in Patent Document 1, one outgoing pipe and one return pipe are provided in the ink tank, and the outgoing pipe and the return pipe are branched to supply ink to the respective recording heads. Each recording head is formed with a circulation path upstream of the filter and a circulation path downstream of the filter. By providing these two circulation paths, the discharge performance of air bubbles is i...

AI Technical Summary

Problems solved by technology

[0005] However, in the ink jet recording head described in Patent Document 1, it is difficult to introduce the ink into the downstream circulation path, so the discharge performance of the bubbles is low, and there is also a problem that the sinking of the liquid component cannot be suppressed.

Furthermore, in such an ink jet recording head, there is a problem that ink cannot be uniformly ejected from all the nozzles when ink is ejected.

In addition, not only in the liquid ejecting apparatus using the inkjet recording head, but also in the liquid ejecting apparatus using the liquid ejecting head ejecting liquid other than ink, there is such a problem

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