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Liquid ejecting apparatus

一种喷射装置、液体喷射头的技术，应用在着墨装置、打印装置、印刷等方向，能够解决压力压力控制复杂等问题

Active Publication Date: 2020-08-21
SEIKO EPSON CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, in such a printer, there is a problem that pressure control for properly maintaining the pressure near the nozzles of the liquid ejection head becomes complicated when the circulation operation for circulating the ink is performed.

Method used

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Examples

Experimental program
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no. 1 approach

[0020] Hereinafter, a first embodiment of a recording device including a liquid ejecting device will be described with reference to the drawings.

[0021] Such as figure 1 As shown, the recording device 11 includes a liquid ejecting device 11 a and has a substantially rectangular parallelepiped shape long in the vertical direction Z as a whole. The vertical direction Z is the direction of gravity. The liquid ejecting device 11 a includes a liquid ejecting unit 12 capable of ejecting ink as an example of a liquid. The liquid ejection unit 12 executes recording by ejecting liquid onto the paper 14 conveyed along the conveyance path 13 indicated by the dashed-two dotted line in the figure. In the present embodiment, the liquid ejection unit 12 is a so-called line head capable of simultaneously ejecting ink across the width direction X of the paper 14 . In addition, the width direction X is a direction along the conveyance area where the paper 14 is conveyed, and is a direction...

no. 2 approach

[0137] Next, a second embodiment of a liquid ejecting device and a method of controlling the liquid ejecting device will be described with reference to the drawings. In addition, this second embodiment does not include the discharge-side pressure regulating valve 41, the feedback flow channel 50, and the fluid introduction channel 70, and on the other hand, by arranging the position of the liquid tank as an example of the liquid storage part 15, the The point that the pressure applied to the nozzle 21 is adjusted is different from that of the first embodiment. In addition, since it is basically the same as the first embodiment in other points, the same reference numerals are given to the same structures to omit overlapping descriptions.

[0138] Such as Figure 8 As shown, the liquid discharge passage 40 is connected between the degassing part 60 in the liquid supply passage 30 and the supply side pressure regulating valve 31 . That is, the liquid discharge channel 40 is con...

no. 3 approach

[0163] Next, a third embodiment of the liquid ejecting device will be described with reference to the drawings. In addition, the third embodiment differs from the first embodiment in that the discharge-side pressure regulating valve 41 is not held by the head holder 90 and that the bypass passage 73 is not provided. In addition, since it is basically the same as the first embodiment in other points, the same reference numerals are given to the same structures to omit overlapping descriptions.

[0164] Such as Figure 9 as well as Figure 10 As shown, the discharge-side pressure regulating valve 41 is provided at a position where the center position of the pressure of the discharge-side liquid chamber 43 is shifted downward by a distance D5 in the vertical direction Z from the nozzle surface 21a. In addition, the discharge-side pressure regulating valve 41 is provided so that the center position of the pressure of the discharge-side liquid chamber 43 is shifted downward by a ...

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Abstract

The invention provides a liquid ejecting apparatus capable of suppressing a situation in which pressure control becomes complicated when a cycle operation is performed. The liquid ejecting apparatus includes: a liquid ejecting head having a nozzle surface in which a nozzle is opened; a liquid supply path through which liquid is supplied to a liquid ejecting head; a liquid discharge path through which the liquid is discharged from the liquid ejecting head; a supply-side pressure adjustment mechanism that adjusts a pressure in a supply-side liquid chamber provided in the liquid supply path to afirst pressure at which a gas-liquid interface formed at a nozzle of the liquid ejecting head is maintained; a discharge-side pressure adjustment valve that introduces fluid into a discharge-side liquid chamber when a pressure in the discharge-side liquid chamber provided in the liquid discharge path becomes a second pressure which is lower than the first pressure and at which the gas-liquid interface formed at the nozzle is maintained; and a flow mechanism that discharges the liquid in the liquid ejecting head toward the liquid discharge path via the discharge-side liquid chamber.

Description

technical field [0001] The present invention relates to a liquid ejecting device such as a printer. Background technique [0002] As an example of a liquid ejecting device, there is an inkjet printer that performs printing by ejecting ink, which is an example of a liquid, from a nozzle opening to a liquid ejecting head. In such a printer, when circulating the ink, it is desirable to keep the pressure near the nozzles of the liquid jet head at an appropriate value so that the ink does not leak from the nozzles and air is not sucked in from the nozzles. [0003] For example, the printer of Patent Document 1 has an arithmetic unit that is connected to the liquid ejection head and is respectively provided on the upstream side and the downstream side of the ink circulation system based on the pressure detected by the Use the given formula to find the pressure of the nozzle. In addition, the printer of Patent Document 1 compares the value Y obtained by the calculation unit with ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B41J2/01B41J2/07
CPCB41J2/01B41J2/07B41J2/17596B41J2/19B41J2/18B41J2/14201B41J2202/12B41J2/16517B41J29/38B41J2/16502B41J2002/031B41J2/03
Inventor 大塚信敏木村仁俊
Owner SEIKO EPSON CORP
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