JP2023122937A - Liquid discharge device and control method of liquid discharge device - Google Patents

Liquid discharge device and control method of liquid discharge device Download PDF

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JP2023122937A
JP2023122937A JP2022026715A JP2022026715A JP2023122937A JP 2023122937 A JP2023122937 A JP 2023122937A JP 2022026715 A JP2022026715 A JP 2022026715A JP 2022026715 A JP2022026715 A JP 2022026715A JP 2023122937 A JP2023122937 A JP 2023122937A
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Prior art keywords
liquid
supply
section
flow path
channel
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健 井上
Takeshi Inoue
俊輔 倉又
Shunsuke Kuramata
将明 安▲藤▼
Masaaki Ando
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Seiko Epson Corp
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Seiko Epson Corp
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Priority to JP2022026715A priority Critical patent/JP2023122937A/en
Priority to CN202310147385.3A priority patent/CN116619910A/en
Priority to US18/171,877 priority patent/US20230264476A1/en
Publication of JP2023122937A publication Critical patent/JP2023122937A/en
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41J—TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
    • B41J2/00—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed
    • B41J2/005—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by bringing liquid or particles selectively into contact with a printing material
    • B41J2/01—Ink jet
    • B41J2/135—Nozzles
    • B41J2/165—Prevention or detection of nozzle clogging, e.g. cleaning, capping or moistening for nozzles
    • B41J2/16517—Cleaning of print head nozzles
    • B41J2/16535—Cleaning of print head nozzles using wiping constructions
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41J—TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
    • B41J2/00—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed
    • B41J2/005—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by bringing liquid or particles selectively into contact with a printing material
    • B41J2/01—Ink jet
    • B41J2/135—Nozzles
    • B41J2/165—Prevention or detection of nozzle clogging, e.g. cleaning, capping or moistening for nozzles
    • B41J2/16517—Cleaning of print head nozzles
    • B41J2/16535—Cleaning of print head nozzles using wiping constructions
    • B41J2/16544—Constructions for the positioning of wipers

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  • Ink Jet (AREA)

Abstract

To provide a liquid discharge device which can supply a liquid to a liquid discharge part at high speed, and a control method of the liquid discharge device.SOLUTION: A liquid discharge device includes: a liquid discharge part 15; a first supply passage 24 which has an upstream end connected to a liquid storage part 18, and can supply a liquid to the downstream side from the upstream side; a branched passage 25 constituting a circulation passage 41 between the first supply passage 24 and the branched passage; an opening/closing valve 28 provided between the liquid storage part 18 in the first supply passage 24 and a first connection part 38; a first unidirectional valve 31 provided between the opening/closing valve 28 in the first supply passage 24 and the first connection part 38; a circulation liquid feeding part 33 which is provided on the branched passage 25, circulates a liquid in the circulation passage 41 at the time of driving, and stops the liquid in a state where the branched passage 25 is opened at the time of drive stop; and a plurality of second supply passages 26 which have one ends connected any one of a portion between the circulation liquid feeding part 33 in the branched passage 25 and the second connection part 39, and the downstream of the first connection part 38 in the first supply passage 24, and have the other end connected to the liquid discharge part 15.SELECTED DRAWING: Figure 1

Description

本発明は、プリンターなどの液体吐出装置、液体吐出装置の制御方法に関する。 The present invention relates to a liquid ejection apparatus such as a printer and a control method for the liquid ejection apparatus.

例えば特許文献１のように、液体吐出装置の一例である液体噴射装置がある。液体噴射装置は、液体収容部の一例である液体供給源から供給される液体を、液体吐出部の一例である液体噴射部が有するノズルから噴射して媒体に印刷する。液体噴射装置は、供給流路と、分岐流路の一例である帰還流路と、循環送液部の一例である循環ポンプと、一方向弁と、を備える。 For example, there is a liquid ejecting apparatus, which is an example of a liquid ejecting apparatus, as disclosed in Patent Document 1. A liquid ejecting apparatus prints on a medium by ejecting liquid supplied from a liquid supply source, which is an example of a liquid containing section, from a nozzle of a liquid ejecting section, which is an example of a liquid ejecting section. A liquid ejecting apparatus includes a supply channel, a return channel that is an example of a branch channel, a circulation pump that is an example of a circulating liquid sending section, and a one-way valve.

供給流路は、液体供給源からノズルに液体を供給する。帰還流路は、両端が供給流路に接続される。すなわち、帰還流路は、第１端が供給流路の第１位置に接続されると共に、第２端が第１位置よりもノズルに近い第２位置に接続される。循環ポンプは、第２位置から帰還流路に液体を引き込むと共に、引き込んだ液体を第１位置に送ることで液体を流動方向に循環させる。一方向弁は、流動方向に循環する液体の流れを許容すると共に、逆方向への流れを制限することで、液体の流動を安定させる。 A supply channel supplies liquid to the nozzle from a liquid supply source. The return channel is connected at both ends to the supply channel. That is, the return channel has a first end connected to a first position of the supply channel and a second end connected to a second position closer to the nozzle than the first position. The circulation pump draws the liquid from the second position into the return channel and sends the drawn liquid to the first position, thereby circulating the liquid in the flow direction. The one-way valve stabilizes the flow of the liquid by permitting the flow of the liquid circulating in the flow direction and restricting the flow in the reverse direction.

特開２０１９－５１６３５号公報JP 2019-51635 A

液体吐出部への液体の供給は、液体を供給する流路を増やすことで高速化できる。しかし、特許文献１では、帰還流路に設けられる一方向弁が、ノズルに向かう液体の流れを制限するため、帰還流路を液体の供給に使用することができない。 The speed of supplying liquid to the liquid ejection section can be increased by increasing the number of flow paths for supplying liquid. However, in Patent Document 1, the one-way valve provided in the return channel restricts the flow of the liquid toward the nozzle, so the return channel cannot be used to supply the liquid.

上記課題を解決する液体吐出装置は、液体を吐出可能な液体吐出部と、前記液体を収容する液体収容部に上流端が接続され、前記液体収容部が設けられる上流側から前記液体吐出部が設けられる下流側へ前記液体を供給可能な第１供給流路と、前記第１供給流路の途中に設けられる第１接続部と、前記第１供給流路の前記第１接続部より下流に設けられる第２接続部と、に接続され、前記第１供給流路との間で循環流路を構成する分岐流路と、前記第１供給流路における前記液体収容部と前記第１接続部との間に設けられる開閉弁と、前記第１供給流路における前記開閉弁と前記第１接続部との間に設けられ、下流側に向かう前記液体の流動を許容し、上流側に向かう前記液体の流動を制限する第１一方向弁と、前記分岐流路に設けられ、駆動時には前記循環流路内で前記液体を循環し、駆動停止時には前記分岐流路を開放した状態で停止する循環送液部と、前記分岐流路における前記循環送液部と前記第２接続部との間、および、前記第１供給流路における前記第１接続部より下流のいずれかに一端が接続され、前記液体吐出部に他端が接続される複数の第２供給流路と、を備える。 A liquid ejecting apparatus for solving the above-described problems has an upstream end connected to a liquid ejecting portion capable of ejecting a liquid and a liquid containing portion for containing the liquid, and the liquid discharging portion is connected from the upstream side where the liquid containing portion is provided. a first supply channel capable of supplying the liquid to a downstream side; a first connection part provided in the middle of the first supply channel; and a downstream side of the first supply channel from the first connection part. a second connecting portion provided; a branch channel connected to and forming a circulation channel with the first supply channel; and the liquid containing portion and the first connecting portion in the first supply channel. and an on-off valve provided between and between the on-off valve and the first connecting portion in the first supply flow path, allowing the flow of the liquid toward the downstream side, and the flow of the liquid toward the upstream side a first one-way valve for restricting the flow of the liquid; and a circulation provided in the branch flow path, which circulates the liquid in the circulation flow path during driving and stops with the branch flow path opened when the driving is stopped. one end is connected to either a liquid feeding section, between the circulating liquid feeding section and the second connection section in the branch channel, or downstream from the first connection section in the first supply channel; and a plurality of second supply channels having the other end connected to the liquid ejection part.

上記課題を解決する液体吐出装置の制御方法は、液体を吐出可能な液体吐出部と、前記液体を収容する液体収容部に上流端が接続され、前記液体収容部が設けられる上流側から前記液体吐出部が設けられる下流側へ前記液体を供給可能な第１供給流路と、前記第１供給流路の途中に設けられる第１接続部と、前記第１供給流路の前記第１接続部より下流に設けられる第２接続部と、に接続され、前記第１供給流路との間で循環流路を構成する分岐流路と、前記第１供給流路における前記液体収容部と前記第１接続部との間に設けられる開閉弁と、前記第１供給流路における前記開閉弁と前記第１接続部との間に設けられ、下流側に向かう前記液体の流動を許容し、上流側に向かう前記液体の流動を制限する第１一方向弁と、前記分岐流路に設けられ、駆動時には前記循環流路内で前記液体を循環し、駆動停止時には前記分岐流路を開放した状態で停止する循環送液部と、前記分岐流路における前記循環送液部と前記第２接続部との間、および、前記第１供給流路における前記第１接続部より下流のいずれかに一端が接続され、前記液体吐出部に他端が接続される複数の第２供給流路と、を備える液体吐出装置の制御方法であって、前記循環流路内で前記液体の循環を行う場合には、前記開閉弁により前記第１供給流路を閉鎖した状態で前記循環送液部を駆動させて循環を行い、前記液体吐出部に前記液体を供給する場合には、前記循環送液部の駆動を停止して前記分岐流路を開放するとともに前記開閉弁により前記第１供給流路を開放することで、前記第１供給流路および前記分岐流路を介して前記液体吐出部に前記液体を供給する。 A method of controlling a liquid ejection apparatus for solving the above-described problems includes a liquid ejection portion capable of ejecting liquid, an upstream end connected to a liquid containing portion for containing the liquid, and the liquid being discharged from the upstream side where the liquid containing portion is provided. a first supply channel capable of supplying the liquid to a downstream side where a discharge portion is provided; a first connection portion provided in the middle of the first supply channel; and the first connection portion of the first supply channel a second connection portion provided further downstream; a branch channel connected to and forming a circulation channel with the first supply channel; an on-off valve provided between the first connection portion and an on-off valve provided between the on-off valve and the first connection portion in the first supply channel to allow the flow of the liquid toward the downstream side, and the flow of the liquid toward the upstream side; a first one-way valve that restricts the flow of the liquid toward the branch flow path, and is provided in the branch flow path to circulate the liquid in the circulation flow path when driving, and open the branch flow path when driving is stopped. One end is located between the stopped circulating liquid-feeding section and the circulating liquid-feeding section and the second connection section in the branch flow path, or downstream of the first connection section in the first supply flow path. and a plurality of second supply channels connected at the other end to the liquid ejecting part, wherein the liquid is circulated in the circulation channel. and when the circulation is performed by driving the liquid circulation unit while the first supply channel is closed by the on-off valve, and the liquid is supplied to the liquid discharge unit, the liquid circulation unit is driven. is stopped to open the branch flow path and the first supply flow path is opened by the on-off valve, so that the liquid is supplied to the liquid ejection portion through the first supply flow path and the branch flow path. supply.

液体吐出装置の第１実施形態の模式図である。1 is a schematic diagram of a first embodiment of a liquid ejection device; FIG. 液体吐出装置の第２実施形態の模式図である。FIG. 5 is a schematic diagram of a second embodiment of a liquid ejection device;

［第１実施形態］
以下、液体吐出装置、液体吐出装置の制御方法の一実施形態を、図面を参照して説明する。液体吐出装置は、例えば、用紙、布帛、ビニール、プラスチック部品、金属部品などの媒体に液体の一例であるインクを吐出して印刷するインクジェット式のプリンターである。 [First embodiment]
An embodiment of a liquid ejection device and a method of controlling the liquid ejection device will be described below with reference to the drawings. A liquid ejection device is an inkjet printer that ejects ink, which is an example of a liquid, onto media such as paper, fabric, vinyl, plastic parts, and metal parts for printing.

図１に示すように、液体吐出装置１１は、装着部１２と、供給機構１３と、保持部１４と、液体吐出部１５と、制御部１６と、を備えてもよい。
装着部１２は、液体を収容する液体収容部１８が着脱可能に装着されてもよい。液体収容部１８に液体の補充が可能である場合、液体収容部１８は、装着部１２に固定されてもよい。 As shown in FIG. 1 , the liquid ejection device 11 may include a mounting section 12 , a supply mechanism 13 , a holding section 14 , a liquid ejection section 15 and a control section 16 .
A liquid containing portion 18 containing liquid may be detachably mounted on the mounting portion 12 . If the liquid containing portion 18 can be replenished with liquid, the liquid containing portion 18 may be fixed to the mounting portion 12 .

保持部１４は、液体吐出部１５を保持する。液体吐出部１５がシリアルタイプである場合、保持部１４は、媒体を横切るように液体吐出部１５を往復移動させるキャリッジであってもよい。液体吐出部１５がラインタイプである場合、保持部１４は、液体吐出部１５を媒体の搬送経路に沿うように固定して配置するものであってもよい。 The holding portion 14 holds the liquid ejection portion 15 . If the liquid ejection section 15 is of a serial type, the holding section 14 may be a carriage that reciprocates the liquid ejection section 15 across the medium. If the liquid ejection section 15 is of a line type, the holding section 14 may fix and arrange the liquid ejection section 15 along the medium transport path.

液体吐出部１５は、液体を吐出可能である。液体吐出部１５は、複数のノズル２０から液体を吐出して図示しない媒体に印刷する。液体吐出部１５は、複数の共通液室２１と、複数のキャビティー２２と、を有してもよい。共通液室２１は、供給機構１３によって供給された液体を一時貯留する。複数のキャビティー２２は、複数のノズル２０に個別に対応するように設けられる。キャビティー２２は、複数の共通液室２１のうち１つの共通液室２１に貯留された液体を、対応するノズル２０に送る。 The liquid ejection part 15 can eject liquid. The liquid ejection unit 15 ejects liquid from a plurality of nozzles 20 to print on a medium (not shown). The liquid ejection section 15 may have multiple common liquid chambers 21 and multiple cavities 22 . The common liquid chamber 21 temporarily stores the liquid supplied by the supply mechanism 13 . A plurality of cavities 22 are provided so as to individually correspond to a plurality of nozzles 20 . The cavity 22 sends the liquid stored in one common liquid chamber 21 out of the plurality of common liquid chambers 21 to the corresponding nozzle 20 .

＜供給機構＞
供給機構１３は、装着部１２に装着された液体収容部１８から液体吐出部１５に液体を供給する。供給機構１３は、第１供給流路２４と、分岐流路２５と、複数の第２供給流路２６と、を備える。供給機構１３は、開閉弁２８と、第３一方向弁２９と、供給ポンプ３０と、第１一方向弁３１と、第１貯留部３２と、循環送液部３３と、第２一方向弁３４と、第２貯留部３５と、を備えてもよい。供給機構１３は、複数の圧力調整弁３６を備えてもよい。 <Supply Mechanism>
The supply mechanism 13 supplies the liquid to the liquid ejection section 15 from the liquid storage section 18 attached to the attachment section 12 . The supply mechanism 13 includes a first supply channel 24 , a branch channel 25 and a plurality of second supply channels 26 . The supply mechanism 13 includes an on-off valve 28, a third one-way valve 29, a supply pump 30, a first one-way valve 31, a first storage section 32, a circulating liquid supply section 33, and a second one-way valve. 34 and a second reservoir 35 may be provided. The supply mechanism 13 may comprise multiple pressure regulating valves 36 .

第１供給流路２４、分岐流路２５、及び複数の第２供給流路２６の各流路は、可撓性を有するチューブにより構成されてもよい。各流路は、穴の開いた硬質部材により構成されてもよい。各流路、硬質部材に形成された溝をフィルムなどで覆うことで構成されてもよい。各流路は、互いに異なる部材により構成されてもよい。各流路は、例えばチューブと硬質部材など、複数の部材を組み合わせて構成されてもよい。 Each channel of the first supply channel 24, the branch channel 25, and the plurality of second supply channels 26 may be configured by a flexible tube. Each channel may comprise a perforated rigid member. Each channel and groove formed in the hard member may be covered with a film or the like. Each channel may be configured by a member different from each other. Each channel may be configured by combining a plurality of members such as a tube and a rigid member.

第１供給流路２４は、液体収容部１８に上流端の一例である第１上流端２４ｕが接続される。第１上流端２４ｕは、例えば液体収容部１８に刺さる中空の針であってもよい。第１上流端２４ｕは、装着部１２に設けられてもよい。第１供給流路２４は、装着部１２に装着された液体収容部１８に第１上流端２４ｕが接続されることにより、液体収容部１８に収容された液体を導出可能になる。第１供給流路２４は、液体収容部１８が設けられる上流側から液体吐出部１５が設けられる下流側へ液体を供給可能である。 A first upstream end 24u, which is an example of an upstream end, of the first supply channel 24 is connected to the liquid storage portion 18 . The first upstream end 24u may be, for example, a hollow needle that pierces the liquid containing portion 18 . The first upstream end 24 u may be provided on the mounting portion 12 . A first upstream end 24u of the first supply channel 24 is connected to the liquid containing portion 18 attached to the mounting portion 12, so that the liquid contained in the liquid containing portion 18 can be drawn out. The first supply channel 24 can supply the liquid from the upstream side where the liquid storage section 18 is provided to the downstream side where the liquid ejection section 15 is provided.

本実施形態では、第１供給流路２４の下流側の端を第１下流端２４ｄという。第１供給流路２４には、第１接続部３８と、第２接続部３９と、が設けられる。第１接続部３８は、第１供給流路２４の途中に設けられる。第１接続部３８は、第１供給流路２４において第１上流端２４ｕと第１下流端２４ｄとの間に設けられる。第２接続部３９は、第１接続部３８より下流に設けられる。本実施形態の第２接続部３９は、第１接続部３８と第１下流端２４ｄとの間に設けられる。すなわち、本実施形態の第２接続部３９は、第１供給流路２４の途中に設けられる。 In this embodiment, the downstream end of the first supply channel 24 is referred to as a first downstream end 24d. A first connection portion 38 and a second connection portion 39 are provided in the first supply channel 24 . The first connecting portion 38 is provided in the middle of the first supply channel 24 . The first connecting portion 38 is provided in the first supply channel 24 between the first upstream end 24u and the first downstream end 24d. The second connection portion 39 is provided downstream from the first connection portion 38 . The second connection portion 39 of this embodiment is provided between the first connection portion 38 and the first downstream end 24d. That is, the second connecting portion 39 of the present embodiment is provided in the middle of the first supply channel 24 .

分岐流路２５は、両端が第１供給流路２４に接続される。分岐流路２５は、第１端２５ｆが第１接続部３８に接続されると共に、第１端２５ｆとは反対の第２端２５ｓが第２接続部３９に接続される。分岐流路２５は、第１供給流路２４との間で循環流路４１を構成する。具体的には、第１接続部３８と第２接続部３９との間の第１供給流路２４及び分岐流路２５は、循環流路４１を構成する。 Both ends of the branch channel 25 are connected to the first supply channel 24 . The branch channel 25 has a first end 25f connected to the first connection portion 38 and a second end 25s opposite to the first end 25f connected to the second connection portion 39 . The branch channel 25 forms a circulation channel 41 with the first supply channel 24 . Specifically, the first supply channel 24 and the branch channel 25 between the first connection portion 38 and the second connection portion 39 constitute a circulation channel 41 .

本実施形態の供給機構１３は、２つの第２供給流路２６を備える。供給機構１３は、３つ以上の第２供給流路２６を備えてもよい。複数の第２供給流路２６は、分岐流路２５における循環送液部３３と第２接続部３９との間、および、第１供給流路２４における第１接続部３８より下流のいずれかに接続される。各第２供給流路２６は、一端の一例である第２上流端２６ｕが第１供給流路２４の第１下流端２４ｄに接続されてもよい。各第２供給流路２６は、他端の一例である第２下流端２６ｄが液体吐出部１５に接続される。複数の第２供給流路２６は、それぞれ異なる共通液室２１に液体を供給してもよい。 The supply mechanism 13 of this embodiment includes two second supply channels 26 . The supply mechanism 13 may have three or more second supply channels 26 . The plurality of second supply channels 26 are located either between the circulating liquid sending part 33 and the second connection part 39 in the branch channel 25 or downstream from the first connection part 38 in the first supply channel 24. Connected. Each second supply channel 26 may be connected to the first downstream end 24d of the first supply channel 24 at a second upstream end 26u, which is an example of one end. A second downstream end 26 d , which is an example of the other end, of each second supply channel 26 is connected to the liquid discharger 15 . The plurality of second supply channels 26 may supply the liquid to different common liquid chambers 21 respectively.

開閉弁２８は、第１供給流路２４における液体収容部１８と第１接続部３８との間に設けられてもよい。開閉弁２８は、第１上流端２４ｕと第１接続部３８との間に設けられてもよい。開閉弁２８は、例えば電磁弁である。開閉弁２８は、第１供給流路２４の閉鎖と開放とを切り替え可能である。 The on-off valve 28 may be provided between the liquid storage portion 18 and the first connection portion 38 in the first supply channel 24 . The on-off valve 28 may be provided between the first upstream end 24 u and the first connecting portion 38 . The on-off valve 28 is, for example, an electromagnetic valve. The on-off valve 28 can switch between closing and opening of the first supply channel 24 .

第１一方向弁３１及び第３一方向弁２９は、第１供給流路２４における開閉弁２８と第１接続部３８との間に設けられてもよい。第１一方向弁３１は、第３一方向弁２９より下流に設けられる。第１一方向弁３１及び第３一方向弁２９は、供給方向Ｄｓの下流側に向かう液体の流動を許容し、上流側に向かう液体の流動を制限する。第１一方向弁３１及び第３一方向弁２９は、液体収容部１８から第１接続部３８に向かう液体の流れを許容し、第１接続部３８から液体収容部１８に向かう液体の流れを制限する。 The first one-way valve 31 and the third one-way valve 29 may be provided between the on-off valve 28 and the first connecting portion 38 in the first supply channel 24 . The first one-way valve 31 is provided downstream from the third one-way valve 29 . The first one-way valve 31 and the third one-way valve 29 allow the liquid to flow downstream in the supply direction Ds and restrict the liquid to flow upstream. The first one-way valve 31 and the third one-way valve 29 allow the flow of liquid from the liquid containing portion 18 to the first connecting portion 38 and prevent the flow of liquid from the first connecting portion 38 to the liquid containing portion 18. Restrict.

供給ポンプ３０は、第１一方向弁３１と第３一方向弁２９との間に設けられてもよい。供給ポンプ３０は、例えばダイヤフラムポンプである。供給ポンプ３０は、液体収容部１８から液体吐出部１５に向けて供給方向Ｄｓに液体を加圧供給する。 The supply pump 30 may be provided between the first one-way valve 31 and the third one-way valve 29 . The supply pump 30 is, for example, a diaphragm pump. The supply pump 30 pressurizes and supplies the liquid from the liquid storage section 18 toward the liquid discharge section 15 in the supply direction Ds.

第１貯留部３２は、液体を貯留可能である。第１貯留部３２は、第１供給流路２４において、開閉弁２８および第１接続部３８との間に設けられてもよい。本実施形態の第１貯留部３２は、第１一方向弁３１と第１接続部３８との間に設けられる。 The first storage section 32 is capable of storing liquid. The first storage portion 32 may be provided between the on-off valve 28 and the first connection portion 38 in the first supply channel 24 . The first storage portion 32 of the present embodiment is provided between the first one-way valve 31 and the first connection portion 38 .

第２貯留部３５は、液体を貯留可能である。第２貯留部３５は、分岐流路２５において、液体が循環する循環方向Ｄｃにおける循環送液部３３よりも下流側に設けられてもよい。本実施形態の第２貯留部３５は、循環送液部３３と第２接続部３９との間の分岐流路２５に設けられる。 The second storage part 35 can store liquid. The second storage section 35 may be provided downstream of the circulating liquid feeding section 33 in the circulation direction Dc in which the liquid circulates in the branch channel 25 . The second storage section 35 of the present embodiment is provided in the branch channel 25 between the circulating liquid feeding section 33 and the second connection section 39 .

第１貯留部３２と第２貯留部３５は、それぞれ壁面の一部を撓み変形可能なフィルムなどの可撓部材４３で形成してもよい。第１貯留部３２を設けることにより、第１供給流路２４を流れる液体の圧力が安定する。第２貯留部３５を設けることにより、分岐流路２５を流れる液体の圧力が安定する。したがって、第１貯留部３２と第２貯留部３５は、液体吐出部１５に供給する液体、および循環される液体の圧力を安定させる。 A part of the wall surface of each of the first storage section 32 and the second storage section 35 may be formed of a flexible member 43 such as a film capable of bending deformation. By providing the first reservoir 32, the pressure of the liquid flowing through the first supply channel 24 is stabilized. By providing the second reservoir 35, the pressure of the liquid flowing through the branch flow path 25 is stabilized. Therefore, the first reservoir 32 and the second reservoir 35 stabilize the pressure of the liquid supplied to the liquid discharger 15 and the liquid circulated.

循環送液部３３は、分岐流路２５に設けられる。循環送液部３３は、例えばチューブポンプである。循環送液部３３は、駆動時には循環流路４１内で液体を循環する。循環送液部３３は、駆動停止時には分岐流路２５を開放した状態で停止する。本実施形態の循環送液部３３は、第１接続部３８側から第２接続部３９側へ分岐流路２５内の液体を流動させる。循環送液部３３は、循環流路４１内の液体を循環方向Ｄｃに流動させる。 The circulating liquid feeding section 33 is provided in the branch flow path 25 . The circulating liquid feeding unit 33 is, for example, a tube pump. The circulating liquid feeding unit 33 circulates the liquid in the circulating flow path 41 during driving. The circulating liquid feeding unit 33 stops with the branch flow path 25 opened when the drive is stopped. The circulating liquid feeding section 33 of the present embodiment causes the liquid in the branch flow path 25 to flow from the first connecting section 38 side to the second connecting section 39 side. The circulation liquid feeding unit 33 causes the liquid in the circulation channel 41 to flow in the circulation direction Dc.

第２一方向弁３４は、分岐流路２５における循環送液部３３と第２接続部３９との間に設けられてもよい。第２一方向弁３４は、分岐流路２５における循環送液部３３と第２貯留部３５との間に設けられてもよい。第２一方向弁３４は、循環方向Ｄｃの下流側に向かう液体の流動を許容し、上流側に向かう液体の流動を制限する。 The second one-way valve 34 may be provided between the circulating liquid supply section 33 and the second connection section 39 in the branch flow path 25 . The second one-way valve 34 may be provided between the circulating liquid supply section 33 and the second storage section 35 in the branch flow path 25 . The second one-way valve 34 allows the liquid to flow downstream in the circulation direction Dc and restricts the liquid to flow upstream.

圧力調整弁３６は、保持部１４に設けられてもよい。圧力調整弁３６は、複数の第２供給流路２６にそれぞれ設けられてもよい。圧力調整弁３６は、加圧供給される液体の圧力を調整することで、ノズル２０に供給される液体の圧力を安定させる。圧力調整弁３６は、液体吐出部１５内の液体の圧力を、ノズル２０にメニスカスが形成される圧力に調整する。ノズル２０から液体が吐出されると、液体吐出部１５内の液体が減少して液体の圧力が低下する。圧力調整弁３６は、下流側が所定の負圧になることで第２供給流路２６を開放する。すなわち、圧力調整弁３６は、液体が消費されて下流側の負圧が大きくなると、第２供給流路２６を開放して液体吐出部１５に液体を供給する。 The pressure regulating valve 36 may be provided on the holding portion 14 . A pressure regulating valve 36 may be provided in each of the plurality of second supply channels 26 . The pressure regulating valve 36 stabilizes the pressure of the liquid supplied to the nozzle 20 by adjusting the pressure of the liquid supplied under pressure. The pressure regulating valve 36 adjusts the pressure of the liquid inside the liquid discharger 15 to a pressure at which a meniscus is formed in the nozzle 20 . When the liquid is ejected from the nozzle 20, the liquid in the liquid ejection section 15 is reduced and the pressure of the liquid is lowered. The pressure regulating valve 36 opens the second supply channel 26 when the downstream side becomes a predetermined negative pressure. That is, when the liquid is consumed and the negative pressure on the downstream side increases, the pressure regulating valve 36 opens the second supply channel 26 to supply the liquid to the liquid discharger 15 .

制御部１６は、液体吐出装置１１における各機構の駆動を統括的に制御すると共に、液体吐出装置１１で実行される各種動作を制御する。
制御部１６は、α：コンピュータープログラムに従って各種処理を実行する１つ以上のプロセッサー、β：各種処理のうち少なくとも一部の処理を実行する１つ以上の専用のハードウェア回路、或いはγ：それらの組み合わせ、を含む回路として構成し得る。ハードウェア回路は、例えば特定用途向け集積回路である。プロセッサーは、ＣＰＵ並びに、ＲＡＭ及びＲＯＭ等のメモリーを含み、メモリーは、処理をＣＰＵに実行させるように構成されたプログラムコードまたは指令を格納している。メモリーすなわちコンピューター可読媒体は、汎用または専用のコンピューターでアクセスできるあらゆる可読媒体を含む。 The control unit 16 comprehensively controls driving of each mechanism in the liquid ejection device 11 and controls various operations performed in the liquid ejection device 11 .
The control unit 16 has α: one or more processors that execute various processes according to a computer program, β: one or more dedicated hardware circuits that execute at least part of the various processes, or γ: their It can be configured as a circuit including a combination. A hardware circuit is, for example, an application specific integrated circuit. A processor includes a CPU and memory, such as RAM and ROM, which stores program code or instructions configured to cause the CPU to perform processes. Memory or computer-readable media includes any readable media that can be accessed by a general purpose or special purpose computer.

＜第１実施形態の作用＞
本実施形態の作用について説明する。
制御部１６は、例えば印刷を行わない待機時に循環流路４１内の液体を循環させてもよい。制御部１６は、液体の循環を定期的に行ってもよい。 <Action of First Embodiment>
The operation of this embodiment will be described.
The controller 16 may circulate the liquid in the circulation channel 41, for example, during standby when printing is not performed. The controller 16 may periodically circulate the liquid.

循環流路４１内で液体の循環を行う場合には、制御部１６は、開閉弁２８により第１供給流路２４を閉鎖させる。制御部１６は、第１供給流路２４が閉鎖した状態で循環送液部３３を駆動させて循環を行う。循環送液部３３は、分岐流路２５内の液体を循環方向Ｄｃに流動させる。 When the liquid is circulated in the circulation channel 41 , the controller 16 closes the first supply channel 24 with the open/close valve 28 . The control unit 16 drives the circulating liquid feeding unit 33 to perform circulation while the first supply channel 24 is closed. The circulating liquid feeding unit 33 causes the liquid in the branch flow path 25 to flow in the circulating direction Dc.

循環流路４１内で液体の循環を行う場合、第１供給流路２４内の液体は、第１接続部３８から分岐流路２５に引き込まれる。第１供給流路２４は、開閉弁２８によって第１接続部３８より上流が閉鎖されている。そのため、第１供給流路２４内の液体は、第１接続部３８より下流の液体が第１接続部３８から分岐流路２５に流入する。 When the liquid is circulated in the circulation channel 41 , the liquid in the first supply channel 24 is drawn into the branch channel 25 from the first connecting portion 38 . The first supply channel 24 is closed upstream from the first connecting portion 38 by an on-off valve 28 . Therefore, in the liquid in the first supply channel 24 , the liquid downstream of the first connecting portion 38 flows into the branch channel 25 from the first connecting portion 38 .

第１接続部３８より上流の第１供給流路２４には、第１一方向弁３１が設けられている。そのため、例えば第１接続部３８において圧力の変動が生じた場合でも、第１一方向弁３１により第１接続部３８から第１供給流路２４の上流への液体の流れが制限される。 A first one-way valve 31 is provided in the first supply channel 24 upstream of the first connecting portion 38 . Therefore, for example, even if the pressure fluctuates in the first connecting portion 38 , the first one-way valve 31 restricts the flow of liquid from the first connecting portion 38 to the upstream of the first supply channel 24 .

第１接続部３８から分岐流路２５に流入した液体は、第２一方向弁３４及び第２貯留部３５を通って循環方向Ｄｃに流れる。分岐流路２５内の液体は、第２接続部３９から第１供給流路２４に流出すると共に、第１供給流路２４を第２接続部３９から第１接続部３８に向けて流動する。第１供給流路２４における循環方向Ｄｃは、供給方向Ｄｓと逆方向である。 The liquid that has flowed into the branch channel 25 from the first connecting portion 38 flows through the second one-way valve 34 and the second storage portion 35 in the circulation direction Dc. The liquid in the branch channel 25 flows out from the second connection portion 39 to the first supply channel 24 and flows through the first supply channel 24 from the second connection portion 39 toward the first connection portion 38 . The circulation direction Dc in the first supply channel 24 is opposite to the supply direction Ds.

液体吐出部１５に液体を供給する場合には、供給機構１３は、第１供給流路２４および分岐流路２５を介して液体吐出部１５に液体を供給する。具体的には、制御部１６は、循環送液部３３の駆動を停止させると共に、開閉弁２８により第１供給流路２４を開放する。駆動を停止した循環送液部３３は、分岐流路２５を開放する。 When supplying the liquid to the liquid ejection section 15 , the supply mechanism 13 supplies the liquid to the liquid ejection section 15 via the first supply channel 24 and the branch channel 25 . Specifically, the control unit 16 stops driving the circulating liquid feeding unit 33 and opens the first supply channel 24 by the on-off valve 28 . The circulating liquid feeding unit 33 that has stopped driving opens the branch channel 25 .

供給ポンプ３０が供給方向Ｄｓに液体を送ると、液体は、第１供給流路２４及び分岐流路２５に分かれて供給方向Ｄｓに流れる。分岐流路２５における供給方向Ｄｓは、循環方向Ｄｃと同じ方向である。第１接続部３８を通過して第１供給流路２４を流れる液体と、第１接続部３８から分岐流路２５に流入した液体は、第２接続部３９で合流する。液体は、複数の第２供給流路２６を介して液体吐出部１５に送られる。 When the supply pump 30 sends the liquid in the supply direction Ds, the liquid is divided into the first supply channel 24 and the branch channel 25 and flows in the supply direction Ds. The supply direction Ds in the branch channel 25 is the same direction as the circulation direction Dc. The liquid that has passed through the first connection portion 38 and flows through the first supply channel 24 and the liquid that has flowed into the branch channel 25 from the first connection portion 38 join together at the second connection portion 39 . The liquid is sent to the liquid ejection section 15 via the plurality of second supply channels 26 .

＜第１実施形態の効果＞
本実施形態の効果について説明する。
（１）第１一方向弁３１は、第１接続部３８より上流の第１供給流路２４に設けられる。循環送液部３３は、駆動停止時には分岐流路２５を開放する。そのため、液体収容部１８から供給される液体は、第１供給流路２４及び分岐流路２５に分かれて流れる。複数の第２供給流路２６は、分岐流路２５における循環送液部３３と第２接続部３９との間、および第１供給流路２４における第１接続部３８より下流のいずれかと、液体吐出部１５と、を接続する。したがって、第１供給流路２４及び１つの第２供給流路２６により液体吐出部１５に液体を供給する場合に比べ、液体吐出部１５へ液体を高速供給できる。 <Effects of the first embodiment>
Effects of the present embodiment will be described.
(1) The first one-way valve 31 is provided in the first supply flow path 24 upstream of the first connecting portion 38 . The circulating liquid feeding unit 33 opens the branch flow path 25 when the drive is stopped. Therefore, the liquid supplied from the liquid storage section 18 flows through the first supply channel 24 and the branch channel 25 . The plurality of second supply channels 26 are either between the circulating liquid sending part 33 and the second connection part 39 in the branch channel 25 or downstream from the first connection part 38 in the first supply channel 24, and the liquid and the discharge part 15 are connected. Therefore, the liquid can be supplied to the liquid ejection section 15 at a higher speed than when the liquid is supplied to the liquid ejection section 15 through the first supply flow path 24 and one second supply flow path 26 .

（２）循環送液部３３は、分岐流路２５内の液体を第１接続部３８側から第２接続部３９側に流動させる。すなわち、循環送液部３３は、第１供給流路２４の液体を第１接続部３８から分岐流路２５に引き入れると共に、第２接続部３９から第１供給流路２４に液体を送り出す。したがって、循環送液部３３の駆動により液体を循環させることができる。 (2) The circulating liquid feeding section 33 causes the liquid in the branch channel 25 to flow from the first connecting section 38 side to the second connecting section 39 side. That is, the circulating liquid feeding section 33 draws the liquid in the first supply channel 24 from the first connecting section 38 into the branched channel 25 and also feeds the liquid from the second connecting section 39 to the first supply channel 24 . Therefore, the liquid can be circulated by driving the circulating liquid feeding section 33 .

（３）第２一方向弁３４は、分岐流路２５を第１接続部３８側から第２接続部３９側へ向かう液体の流動を許容する。すなわち、第２一方向弁３４は、液体収容部１８から液体吐出部１５に向かう液体の流れを許容する。第２一方向弁３４は、分岐流路２５を第２接続部３９側から第１接続部３８側に向かう液体の流動を制限する。したがって、例えば循環送液部３３の駆動に伴って脈動が生じても、第２接続部３９から分岐流路２５に液体を引き込むことを低減できる。 (3) The second one-way valve 34 allows the liquid to flow from the first connecting portion 38 side to the second connecting portion 39 side in the branch flow path 25 . That is, the second one-way valve 34 allows the liquid to flow from the liquid storage section 18 toward the liquid discharge section 15 . The second one-way valve 34 restricts the flow of liquid from the second connecting portion 39 side to the first connecting portion 38 side in the branch flow path 25 . Therefore, for example, even if pulsation occurs due to the driving of the circulating liquid feeding section 33 , it is possible to reduce the liquid being drawn into the branch flow path 25 from the second connecting section 39 .

（５）第１貯留部３２は、液体を貯留可能である。第１貯留部３２を第１供給流路２４に設けることにより、第１供給流路２４内における液体の圧力変動を低減することができる。 (5) The first storage section 32 is capable of storing liquid. By providing the first reservoir 32 in the first supply channel 24, the pressure fluctuation of the liquid in the first supply channel 24 can be reduced.

（６）第２貯留部３５は、液体を貯留可能である。第２貯留部３５を循環送液部３３より循環方向Ｄｃの下流に設けることにより、循環する液体の圧力変動を低減することができる。 (6) The second storage part 35 can store liquid. By providing the second storage section 35 downstream of the circulating liquid feeding section 33 in the circulation direction Dc, it is possible to reduce the pressure fluctuation of the circulating liquid.

（７）圧力調整弁３６は、下流側が所定の負圧になることで第２供給流路２６を開放する。そのため、第２供給流路２６が接続される液体吐出部１５内の液体の圧力を容易に調整できる。 (7) The pressure regulating valve 36 opens the second supply channel 26 when the downstream side becomes a predetermined negative pressure. Therefore, it is possible to easily adjust the pressure of the liquid in the liquid ejection section 15 to which the second supply channel 26 is connected.

（第２実施形態）
次に、液体吐出装置の第２実施形態について図を参照しながら説明する。なお、この第２実施形態は、循環方向が第１実施形態の場合とは異なっている。そして、その他の点では第１実施形態とほぼ同じであるため、同一の構成については同一符号を付すことによって重複した説明は省略する。 (Second embodiment)
Next, a second embodiment of the liquid ejecting apparatus will be described with reference to the drawings. The second embodiment differs from the first embodiment in the direction of circulation. Since other points are substantially the same as those of the first embodiment, the same components are denoted by the same reference numerals, and redundant explanations are omitted.

図２に示すように、本実施形態の循環送液部３３は、第２接続部３９側から第１接続部３８側へ分岐流路２５内の液体を流動させる。循環送液部３３は、循環流路４１内の液体を循環方向Ｄｃに流動させる。循環方向Ｄｃは、第１実施形態での循環方向Ｄｃと反対の方向である。 As shown in FIG. 2, the circulating liquid feeding section 33 of the present embodiment causes the liquid in the branch channel 25 to flow from the second connecting section 39 side to the first connecting section 38 side. The circulation liquid feeding unit 33 causes the liquid in the circulation channel 41 to flow in the circulation direction Dc. The circulation direction Dc is opposite to the circulation direction Dc in the first embodiment.

第２貯留部３５は、分岐流路２５において、液体が循環する循環方向Ｄｃにおける循環送液部３３よりも下流側に設けられてもよい。本実施形態の第２貯留部３５は、循環送液部３３と第１接続部３８との間の分岐流路２５に設けられる。 The second storage section 35 may be provided downstream of the circulating liquid feeding section 33 in the circulation direction Dc in which the liquid circulates in the branch channel 25 . The second storage section 35 of the present embodiment is provided in the branch channel 25 between the circulating liquid feeding section 33 and the first connection section 38 .

＜第２実施形態の作用＞
本実施形態の作用について説明する。
循環流路４１内で液体の循環を行う場合には、制御部１６は、開閉弁２８により第１供給流路２４を閉鎖させる。制御部１６は、第１供給流路２４が閉鎖した状態で循環送液部３３を駆動させて循環を行う。循環送液部３３は、分岐流路２５内の液体を循環方向Ｄｃに流動させる。 <Action of Second Embodiment>
The operation of this embodiment will be described.
When the liquid is circulated in the circulation channel 41 , the controller 16 closes the first supply channel 24 with the open/close valve 28 . The control unit 16 drives the circulating liquid feeding unit 33 to perform circulation while the first supply channel 24 is closed. The circulating liquid feeding unit 33 causes the liquid in the branch flow path 25 to flow in the circulating direction Dc.

循環流路４１内で液体の循環を行う場合、第１供給流路２４内の液体は、第２接続部３９から分岐流路２５に引き込まれる。第２接続部３９から分岐流路２５に流入した液体は、第２貯留部３５を通って循環方向Ｄｃに流れる。分岐流路２５内の液体は、第１接続部３８から第１供給流路２４に流出する。 When the liquid is circulated in the circulation channel 41 , the liquid in the first supply channel 24 is drawn into the branch channel 25 from the second connection portion 39 . The liquid that has flowed into the branch channel 25 from the second connection portion 39 flows through the second storage portion 35 in the circulation direction Dc. The liquid in the branch channel 25 flows out from the first connection portion 38 to the first supply channel 24 .

第１供給流路２４は、開閉弁２８によって第１接続部３８より上流が閉鎖されていると共に、第１一方向弁３１及び第３一方向弁２９により液体収容部１８に向かう液体の流れが制限される。そのため、第１接続部３８から第１供給流路２４に送られた液体は、第２接続部３９に向かって循環方向Ｄｃに流動する。第１供給流路２４における循環方向Ｄｃは、供給方向Ｄｓと同じ方向である。 The first supply channel 24 is closed upstream from the first connecting portion 38 by the on-off valve 28 , and the first one-way valve 31 and the third one-way valve 29 prevent the liquid from flowing toward the liquid storage portion 18 . Limited. Therefore, the liquid sent from the first connection portion 38 to the first supply channel 24 flows toward the second connection portion 39 in the circulation direction Dc. The circulation direction Dc in the first supply channel 24 is the same as the supply direction Ds.

液体吐出部１５に液体を供給する場合には、供給機構１３は、第１供給流路２４および分岐流路２５を介して液体吐出部１５に液体を供給する。具体的には、制御部１６は、循環送液部３３の駆動を停止させると共に、開閉弁２８により第１供給流路２４を開放する。駆動を停止した循環送液部３３は、分岐流路２５を開放する。 When supplying the liquid to the liquid ejection section 15 , the supply mechanism 13 supplies the liquid to the liquid ejection section 15 via the first supply channel 24 and the branch channel 25 . Specifically, the control unit 16 stops driving the circulating liquid feeding unit 33 and opens the first supply channel 24 by the on-off valve 28 . The circulating liquid feeding unit 33 that has stopped driving opens the branch channel 25 .

供給ポンプ３０が供給方向Ｄｓに液体を送ると、液体は、第１供給流路２４及び分岐流路２５に分かれて供給方向Ｄｓに流れる。分岐流路２５における供給方向Ｄｓは、循環方向Ｄｃと逆方向である。第１接続部３８を通過して第１供給流路２４を流れる液体と、第１接続部３８から分岐流路２５に流入した液体は、第２接続部３９で合流する。液体は、複数の第２供給流路２６を介して液体吐出部１５に送られる。 When the supply pump 30 sends the liquid in the supply direction Ds, the liquid is divided into the first supply channel 24 and the branch channel 25 and flows in the supply direction Ds. The supply direction Ds in the branch channel 25 is opposite to the circulation direction Dc. The liquid that has passed through the first connection portion 38 and flows through the first supply channel 24 and the liquid that has flowed into the branch channel 25 from the first connection portion 38 join together at the second connection portion 39 . The liquid is sent to the liquid ejection section 15 via the plurality of second supply channels 26 .

＜第２実施形態の効果＞
本実施形態の効果について説明する。
（４）循環送液部３３は、分岐流路２５内の液体を第２接続部３９側から第１接続部３８側に流動させる。すなわち、循環送液部３３は、第１供給流路２４の液体を第２接続部３９から分岐流路２５に引き入れると共に、第１接続部３８から第１供給流路２４に液体を送り出す。したがって、循環送液部３３の駆動により液体を循環させることができる。 <Effects of Second Embodiment>
Effects of the present embodiment will be described.
(4) The circulating liquid feeding section 33 causes the liquid in the branch channel 25 to flow from the second connecting section 39 side to the first connecting section 38 side. That is, the circulating liquid feeding section 33 draws the liquid in the first supply channel 24 from the second connection section 39 into the branched channel 25 and also feeds the liquid from the first connection section 38 to the first supply channel 24 . Therefore, the liquid can be circulated by driving the circulating liquid feeding section 33 .

［変更例］
本実施形態は、以下のように変更して実施することができる。本実施形態及び以下の変更例は、技術的に矛盾しない範囲で互いに組み合わせて実施することができる。 [Change example]
This embodiment can be implemented with the following modifications. This embodiment and the following modified examples can be implemented in combination with each other within a technically consistent range.

・圧力調整弁３６は、第２接続部３９と第１下流端２４ｄとの間の第１供給流路２４に設けられてもよい。
・例えば液体収容部１８と液体吐出部１５との位置関係で液体吐出部１５内の液体の圧力を調整してもよい。この場合、液体吐出装置１１は、圧力調整弁３６を備えない構成としてもよい。 - The pressure regulating valve 36 may be provided in the first supply flow path 24 between the second connection portion 39 and the first downstream end 24d.
- For example, the pressure of the liquid in the liquid discharger 15 may be adjusted according to the positional relationship between the liquid container 18 and the liquid discharger 15 . In this case, the liquid ejection device 11 may be configured without the pressure regulating valve 36 .

・供給機構１３は、液体収容部１８から液体吐出部１５に、例えば水頭により液体を供給してもよい。この場合、液体吐出装置１１は、供給ポンプ３０を備えない構成としてもよい。 - The supply mechanism 13 may supply the liquid from the liquid storage section 18 to the liquid ejection section 15 by, for example, a hydraulic head. In this case, the liquid ejection device 11 may be configured without the supply pump 30 .

・供給ポンプ３０は、例えばチューブポンプであってもよい。供給ポンプ３０は、液体収容部１８に加圧した気体を送ることで液体を供給する送気ポンプであってもよい。供給ポンプ３０がチューブポンプもしくは送気ポンプである場合、供給機構１３は、第１一方向弁３１及び第３一方向弁２９の少なくとも一方を備えない構成としてもよい。 • The supply pump 30 may be, for example, a tube pump. The supply pump 30 may be an air supply pump that supplies the liquid by sending pressurized gas to the liquid storage section 18 . When the supply pump 30 is a tube pump or an air supply pump, the supply mechanism 13 may be configured without at least one of the first one-way valve 31 and the third one-way valve 29 .

・第１貯留部３２及び第２貯留部３５のうち少なくとも一方は、内部を大気に開放した開放系のタンクであってもよい。
・液体吐出装置１１は、第１貯留部３２と第２貯留部３５の何れか一方を備える構成としてもよい。液体吐出装置１１は、３つ以上の貯留部を備える構成としてもよいし、貯留部を備えない構成としてもよい。第１貯留部３２は、第１接続部３８より下流の第１供給流路２４に設けられてもよい。 - At least one of the first storage section 32 and the second storage section 35 may be an open tank whose inside is open to the atmosphere.
- The liquid ejection device 11 may be configured to include either one of the first reservoir 32 and the second reservoir 35 . The liquid ejection device 11 may be configured with three or more reservoirs, or may be configured with no reservoirs. The first storage portion 32 may be provided in the first supply channel 24 downstream from the first connection portion 38 .

・複数の第２供給流路２６は、同じ共通液室２１に液体を供給してもよい。すなわち、１つの共通液室２１には、２つ以上の第２供給流路２６が接続されてもよい。
・第２接続部３９は、第１供給流路２４の第１下流端２４ｄに設けられてもよい。 - The plurality of second supply channels 26 may supply liquid to the same common liquid chamber 21 . That is, two or more second supply channels 26 may be connected to one common liquid chamber 21 .
- The second connecting portion 39 may be provided at the first downstream end 24 d of the first supply channel 24 .

・複数の第２供給流路２６は、供給方向Ｄｓにおいて互いに異なる位置に接続されてもよい。
・複数の第２供給流路２６は、第１接続部３８と第２接続部３９との間の第１供給流路２４に接続されてもよい。 - The plurality of second supply channels 26 may be connected to different positions in the supply direction Ds.
- The plurality of second supply channels 26 may be connected to the first supply channel 24 between the first connection portion 38 and the second connection portion 39 .

・複数の第２供給流路２６は、循環送液部３３と第２接続部３９との間の分岐流路２５に接続されてもよい。
・複数の第２供給流路２６のうち一部の第２供給流路２６は、分岐流路２５における循環送液部３３と第２接続部３９との間に接続され、他の第２供給流路２６は、第１供給流路２４における第１接続部３８より下流に接続されてもよい。 - The plurality of second supply flow paths 26 may be connected to the branch flow path 25 between the circulating liquid feeding section 33 and the second connection section 39 .
Some of the second supply channels 26 among the plurality of second supply channels 26 are connected between the circulating liquid feeding unit 33 and the second connection part 39 in the branch channel 25, and the other second supply channels 26 are connected to each other. The channel 26 may be connected downstream from the first connector 38 in the first supply channel 24 .

・液体吐出装置１１は、複数の供給機構１３を備えてもよい。複数の供給機構１３は、それぞれ異なる種類の液体を供給してもよい。種類の異なる液体とは、例えば色の異なるインクである。液体吐出部１５は、複数種類の液体を吐出することにより、媒体にカラー印刷を行ってもよい。液体吐出装置１１は、循環流路４１と複数の第２供給流路２６を有する供給機構１３とは別に、１つの第１供給流路２４と１つの第２供給流路２６とを有する供給機構を備えてもよい。 - The liquid ejection device 11 may include a plurality of supply mechanisms 13 . The plurality of supply mechanisms 13 may supply different types of liquid. Liquids of different types are, for example, inks of different colors. The liquid ejection section 15 may perform color printing on the medium by ejecting a plurality of types of liquid. The liquid ejection device 11 has a supply mechanism having one first supply channel 24 and one second supply channel 26 separately from the supply mechanism 13 having the circulation channel 41 and a plurality of second supply channels 26 . may be provided.

・液体吐出装置１１は、インク以外の他の液体を噴射したり吐出したりする液体吐出装置であってもよい。液体吐出装置から微小量の液滴となって吐出される液体の状態としては、粒状、涙状、糸状に尾を引くものも含むものとする。ここでいう液体は、液体吐出装置から吐出させることができるような材料であればよい。例えば、液体は、物質が液相であるときの状態のものであればよく、粘性の高い又は低い液状体、ゾル、ゲル水、その他の無機溶剤、有機溶剤、溶液、液状樹脂、液状金属、金属融液、のような流状体を含むものとする。液体は、物質の一状態としての液体のみならず、顔料や金属粒子などの固形物からなる機能材料の粒子が溶媒に溶解、分散又は混合されたものなども含むものとする。液体の代表的な例としては上記実施形態で説明したようなインクや液晶等が挙げられる。ここで、インクとは一般的な水性インク及び油性インク並びにジェルインク、ホットメルトインク等の各種液体組成物を包含するものとする。液体吐出装置の具体例としては、例えば、液晶ディスプレイ、エレクトロルミネッセンスディスプレイ、面発光ディスプレイ、カラーフィルターの製造等に用いられる電極材や色材等の材料を分散又は溶解のかたちで含む液体を吐出する装置がある。液体吐出装置は、バイオチップ製造に用いられる生体有機物を吐出する装置、精密ピペットとして用いられ試料となる液体を吐出する装置、捺染装置やマイクロディスペンサー等であってもよい。液体吐出装置は、時計やカメラ等の精密機械にピンポイントで潤滑油を吐出する装置、光通信素子等に用いられる微小半球レンズ、光学レンズ、などを形成するために紫外線硬化樹脂等の透明樹脂液を基板上に吐出する装置であってもよい。液体吐出装置は、基板などをエッチングするために酸又はアルカリ等のエッチング液を吐出する装置であってもよい。 - The liquid ejection device 11 may be a liquid ejection device that ejects or ejects a liquid other than ink. The state of the liquid ejected from the liquid ejecting apparatus in the form of minute droplets includes granular, tear-like, and thread-like trailing liquids. The liquid referred to here may be any material as long as it can be ejected from the liquid ejecting apparatus. For example, the liquid may be in a state when the substance is in a liquid phase, such as a high or low viscosity liquid, sol, gel water, other inorganic solvents, organic solvents, solutions, liquid resins, liquid metals, It is intended to include fluids such as metal melts. The term "liquid" includes not only a liquid as one state of a substance, but also a solution, dispersion, or mixture of particles of a functional material made of a solid substance such as a pigment or metal particles dissolved in a solvent. Typical examples of the liquid include ink and liquid crystal as described in the above embodiments. Here, the ink includes general water-based inks, oil-based inks, gel inks, hot-melt inks, and various other liquid compositions. As a specific example of the liquid ejecting apparatus, for example, a liquid containing dispersed or dissolved materials such as electrode materials and coloring materials used in the manufacture of liquid crystal displays, electroluminescence displays, surface emitting displays, color filters, etc., is ejected. I have a device. The liquid ejecting apparatus may be an apparatus for ejecting a bioorganic material used for biochip manufacturing, an apparatus for ejecting a sample liquid used as a precision pipette, a printing apparatus, a microdispenser, or the like. The liquid ejection device is a device that ejects lubricating oil to precision machines such as watches and cameras with pinpoint accuracy, and transparent resin such as ultraviolet curable resin is used to form micro hemispherical lenses and optical lenses used in optical communication devices and the like. It may be a device that discharges a liquid onto a substrate. The liquid ejecting apparatus may be an apparatus that ejects an etchant such as acid or alkali for etching a substrate or the like.

［付記］
以下に、上述した実施形態及び変更例から把握される技術的思想及びその作用効果を記載する。 [Appendix]
The technical ideas and effects obtained from the above-described embodiments and modifications will be described below.

（Ａ）液体吐出装置は、液体を吐出可能な液体吐出部と、前記液体を収容する液体収容部に上流端が接続され、前記液体収容部が設けられる上流側から前記液体吐出部が設けられる下流側へ前記液体を供給可能な第１供給流路と、前記第１供給流路の途中に設けられる第１接続部と、前記第１供給流路の前記第１接続部より下流に設けられる第２接続部と、に接続され、前記第１供給流路との間で循環流路を構成する分岐流路と、前記第１供給流路における前記液体収容部と前記第１接続部との間に設けられる開閉弁と、前記第１供給流路における前記開閉弁と前記第１接続部との間に設けられ、下流側に向かう前記液体の流動を許容し、上流側に向かう前記液体の流動を制限する第１一方向弁と、前記分岐流路に設けられ、駆動時には前記循環流路内で前記液体を循環し、駆動停止時には前記分岐流路を開放した状態で停止する循環送液部と、前記分岐流路における前記循環送液部と前記第２接続部との間、および、前記第１供給流路における前記第１接続部より下流のいずれかに一端が接続され、前記液体吐出部に他端が接続される複数の第２供給流路と、を備える。 (A) A liquid ejection device has an upstream end connected to a liquid ejection portion capable of ejecting a liquid and a liquid storage portion that stores the liquid, and the liquid ejection portion is provided from the upstream side where the liquid storage portion is provided. a first supply channel capable of supplying the liquid to a downstream side; a first connection portion provided in the middle of the first supply channel; and a first connection portion provided downstream of the first supply channel. a second connection portion connected to a branch channel forming a circulation channel between the first supply channel and the liquid storage portion and the first connection portion in the first supply channel; an on-off valve provided in between; and an on-off valve provided between the on-off valve and the first connecting portion in the first supply flow path to allow the flow of the liquid toward the downstream side and the flow of the liquid toward the upstream side. a first one-way valve that restricts the flow; and a circulating liquid feed that is provided in the branch flow path, circulates the liquid in the circulation flow path when driving, and stops with the branch flow path open when driving is stopped. and one end is connected to either between the circulating liquid-feeding portion and the second connection portion in the branch channel, or downstream from the first connection portion in the first supply channel, and the liquid and a plurality of second supply channels, the other ends of which are connected to the discharge part.

この構成によれば、第１一方向弁は、第１接続部より上流の第１供給流路に設けられる。循環送液部は、駆動停止時には分岐流路を開放する。そのため、液体収容部から供給される液体は、第１供給流路及び分岐流路に分かれて流れる。複数の第２供給流路は、分岐流路における循環送液部と第２接続部との間、および第１供給流路における第１接続部より下流のいずれかと、液体吐出部と、を接続する。したがって、第１供給流路及び１つの第２供給流路により液体吐出部に液体を供給する場合に比べ、液体吐出部へ液体を高速供給できる。 According to this configuration, the first one-way valve is provided in the first supply channel upstream of the first connecting portion. The circulating liquid feeding section opens the branch flow path when the drive is stopped. As a result, the liquid supplied from the liquid storage section is divided into the first supply flow path and the branch flow path. The plurality of second supply channels connect either between the circulating liquid sending part and the second connection part in the branch channel, or downstream from the first connection part in the first supply channel, and the liquid ejection part. do. Therefore, the liquid can be supplied to the liquid ejection section at a higher speed than when the liquid is supplied to the liquid ejection section through the first supply channel and one second supply channel.

（Ｂ）液体吐出装置において、前記循環送液部は、前記第１接続部側から前記第２接続部側へ前記分岐流路内の前記液体を流動させてもよい。
この構成によれば、循環送液部は、分岐流路内の液体を第１接続部側から第２接続部側に流動させる。すなわち、循環送液部は、第１供給流路の液体を第１接続部から分岐流路に引き入れると共に、第２接続部から第１供給流路に液体を送り出す。したがって、循環送液部の駆動により液体を循環させることができる。 (B) In the liquid ejection device, the circulating liquid feeding section may cause the liquid in the branch flow path to flow from the first connecting section side to the second connecting section side.
According to this configuration, the circulating liquid feeding section causes the liquid in the branch channel to flow from the first connecting section side to the second connecting section side. That is, the circulating liquid feeding section draws the liquid in the first supply channel from the first connecting section into the branched channel, and also feeds the liquid from the second connecting section to the first supply channel. Therefore, the liquid can be circulated by driving the circulating liquid feeding section.

（Ｃ）液体吐出装置は、前記分岐流路における前記循環送液部と前記第２接続部との間に設けられ、下流側に向かう前記液体の流動を許容し、上流側に向かう前記液体の流動を制限する第２一方向弁を更に備えてもよい。 (C) A liquid ejection device is provided between the circulating liquid feeding section and the second connection section in the branch channel, allows the liquid to flow downstream, and allows the liquid to flow upstream. A second one-way valve that restricts flow may also be included.

この構成によれば、第２一方向弁は、分岐流路を第１接続部側から第２接続部側へ向かう液体の流動を許容する。すなわち、第２一方向弁は、液体収容部から液体吐出部に向かう液体の流れを許容する。第２一方向弁は、分岐流路を第２接続部側から第１接続部側に向かう液体の流動を制限する。したがって、例えば循環送液部の駆動に伴って脈動が生じても、第２接続部から分岐流路に液体を引き込むことを低減できる。 According to this configuration, the second one-way valve allows the liquid to flow through the branch flow path from the first connecting portion side toward the second connecting portion side. That is, the second one-way valve allows the liquid to flow from the liquid storage section toward the liquid discharge section. The second one-way valve restricts the flow of liquid from the second connecting portion side to the first connecting portion side in the branch flow path. Therefore, for example, even if pulsation occurs due to the driving of the circulating liquid feeding section, it is possible to reduce the amount of liquid that is drawn into the branch flow path from the second connection section.

（Ｄ）液体吐出装置において、前記循環送液部は、前記第２接続部側から前記第１接続部側へ前記分岐流路内の前記液体を流動させてもよい。
この構成によれば、循環送液部は、分岐流路内の液体を第２接続部側から第１接続部側に流動させる。すなわち、循環送液部は、第１供給流路の液体を第２接続部から分岐流路に引き入れると共に、第１接続部から第１供給流路に液体を送り出す。したがって、循環送液部の駆動により液体を循環させることができる。 (D) In the liquid ejection device, the circulating liquid feeding section may cause the liquid in the branch flow path to flow from the second connecting section side to the first connecting section side.
According to this configuration, the circulating liquid feeding section causes the liquid in the branch channel to flow from the second connecting section side to the first connecting section side. That is, the circulating liquid feeding section draws the liquid in the first supply channel from the second connecting section into the branched channel, and also feeds the liquid from the first connecting section to the first supply channel. Therefore, the liquid can be circulated by driving the circulating liquid feeding section.

（Ｅ）液体吐出装置は、前記第１供給流路において、前記開閉弁および前記第１接続部との間に設けられ、前記液体を貯留可能な第１貯留部を更に備えてもよい。
この構成によれば、第１貯留部は、液体を貯留可能である。第１貯留部を第１供給流路に設けることにより、第１供給流路内における液体の圧力変動を低減することができる。 (E) The liquid ejection device may further include a first storage section that is provided between the on-off valve and the first connection section in the first supply flow path and that is capable of storing the liquid.
According to this configuration, the first reservoir can store the liquid. By providing the first reservoir in the first supply channel, it is possible to reduce the pressure fluctuation of the liquid in the first supply channel.

（Ｆ）液体吐出装置は、前記分岐流路において、前記液体が循環する循環方向における前記循環送液部よりも下流側に設けられ、前記液体を貯留可能な第２貯留部を更に備えてもよい。 (F) The liquid ejection device may further include a second reservoir that is provided in the branch flow path downstream of the circulatory liquid feeder in the circulation direction in which the liquid circulates, and that is capable of storing the liquid. good.

この構成によれば、第２貯留部は、液体を貯留可能である。第２貯留部を循環送液部よりも循環方向の下流に設けることにより、循環する液体の圧力変動を低減することができる。 According to this configuration, the second storage section can store the liquid. By providing the second storage section downstream in the circulation direction from the circulating liquid feeding section, pressure fluctuations of the circulating liquid can be reduced.

（Ｇ）液体吐出装置は、複数の前記第２供給流路にそれぞれ設けられ、下流側が所定の負圧になることで前記第２供給流路を開放する圧力調整弁を更に備えてもよい。
この構成によれば、圧力調整弁は、下流側が所定の負圧になることで第２供給流路を開放する。そのため、第２供給流路が接続される液体吐出部内の液体の圧力を容易に調整できる。 (G) The liquid ejection device may further include a pressure regulating valve provided in each of the plurality of second supply channels and opening the second supply channels when a downstream side becomes a predetermined negative pressure.
According to this configuration, the pressure regulating valve opens the second supply channel when the downstream side becomes a predetermined negative pressure. Therefore, it is possible to easily adjust the pressure of the liquid in the liquid ejection section to which the second supply channel is connected.

（Ｈ）液体吐出装置の制御方法は、液体を吐出可能な液体吐出部と、前記液体を収容する液体収容部に上流端が接続され、前記液体収容部が設けられる上流側から前記液体吐出部が設けられる下流側へ前記液体を供給可能な第１供給流路と、前記第１供給流路の途中に設けられる第１接続部と、前記第１供給流路の前記第１接続部より下流に設けられる第２接続部と、に接続され、前記第１供給流路との間で循環流路を構成する分岐流路と、前記第１供給流路における前記液体収容部と前記第１接続部との間に設けられる開閉弁と、前記第１供給流路における前記開閉弁と前記第１接続部との間に設けられ、下流側に向かう前記液体の流動を許容し、上流側に向かう前記液体の流動を制限する第１一方向弁と、前記分岐流路に設けられ、駆動時には前記循環流路内で前記液体を循環し、駆動停止時には前記分岐流路を開放した状態で停止する循環送液部と、前記分岐流路における前記循環送液部と前記第２接続部との間、および、前記第１供給流路における前記第１接続部より下流のいずれかに一端が接続され、前記液体吐出部に他端が接続される複数の第２供給流路と、を備える液体吐出装置の制御方法であって、前記循環流路内で前記液体の循環を行う場合には、前記開閉弁により前記第１供給流路を閉鎖した状態で前記循環送液部を駆動させて循環を行い、前記液体吐出部に前記液体を供給する場合には、前記循環送液部の駆動を停止して前記分岐流路を開放するとともに前記開閉弁により前記第１供給流路を開放することで、前記第１供給流路および前記分岐流路を介して前記液体吐出部に前記液体を供給する。 (H) A method of controlling a liquid ejection device includes: a liquid ejection portion capable of ejecting liquid; a first supply channel capable of supplying the liquid to a downstream side provided with, a first connection portion provided in the middle of the first supply channel, and a downstream side of the first supply channel from the first connection portion a second connection portion provided in a branch channel that is connected to and forms a circulation channel with the first supply channel; and the first connection between the liquid containing portion and the first supply channel and an on-off valve provided between the part and the on-off valve provided between the on-off valve and the first connection part in the first supply channel to allow the flow of the liquid toward the downstream side and toward the upstream side a first one-way valve for restricting the flow of the liquid; and a first one-way valve provided in the branch flow path, which circulates the liquid in the circulation flow path during driving, and stops with the branch flow path opened when driving is stopped. One end is connected to either a circulating liquid-feeding section, between the circulating liquid-feeding section and the second connection section in the branch flow path, or downstream of the first connection section in the first supply flow path. , and a plurality of second supply channels having the other end connected to the liquid ejection part, wherein the liquid is circulated in the circulation channel, wherein the When the circulating liquid feeding unit is driven to circulate with the first supply channel closed by an on-off valve and the liquid is supplied to the liquid discharging unit, the driving of the circulating liquid feeding unit is stopped. to open the branch flow path and open the first supply flow path by the on-off valve, thereby supplying the liquid to the liquid discharge section through the first supply flow path and the branch flow path. .

この方法によれば、上記液体吐出装置と同様の効果を奏することができる。 According to this method, the same effects as those of the liquid ejecting apparatus can be obtained.

１１…液体吐出装置、１２…装着部、１３…供給機構、１４…保持部、１５…液体吐出部、１６…制御部、１８…液体収容部、２０…ノズル、２１…共通液室、２２…キャビティー、２４…第１供給流路、２４ｄ…第１下流端、２４ｕ…第１上流端、２５…分岐流路、２５ｆ…第１端、２５ｓ…第２端、２６…第２供給流路、２６ｄ…第２下流端、２６ｕ…第２上流端、２８…開閉弁、２９…第３一方向弁、３０…供給ポンプ、３１…第１一方向弁、３２…第１貯留部、３３…循環送液部、３４…第２一方向弁、３５…第２貯留部、３６…圧力調整弁、３８…第１接続部、３９…第２接続部、４１…循環流路、４３…可撓部材、Ｄｃ…循環方向、Ｄｓ…供給方向。 DESCRIPTION OF SYMBOLS 11... Liquid ejection apparatus 12... Mounting part 13... Supply mechanism 14... Holding part 15... Liquid ejection part 16... Control part 18... Liquid storage part 20... Nozzle 21... Common liquid chamber 22... Cavity 24 First supply channel 24d First downstream end 24u First upstream end 25 Branched channel 25f First end 25s Second end 26 Second supply channel , 26d... Second downstream end 26u... Second upstream end 28... On-off valve 29... Third one-way valve 30... Supply pump 31... First one-way valve 32... First reservoir 33... Circulation liquid supply unit 34 Second one-way valve 35 Second reservoir 36 Pressure regulating valve 38 First connection portion 39 Second connection portion 41 Circulation flow path 43 Flexible Members, Dc... circulation direction, Ds... supply direction.

Claims (8)

液体を吐出可能な液体吐出部と、
前記液体を収容する液体収容部に上流端が接続され、前記液体収容部が設けられる上流側から前記液体吐出部が設けられる下流側へ前記液体を供給可能な第１供給流路と、
前記第１供給流路の途中に設けられる第１接続部と、前記第１供給流路の前記第１接続部より下流に設けられる第２接続部と、に接続され、前記第１供給流路との間で循環流路を構成する分岐流路と、
前記第１供給流路における前記液体収容部と前記第１接続部との間に設けられる開閉弁と、
前記第１供給流路における前記開閉弁と前記第１接続部との間に設けられ、下流側に向かう前記液体の流動を許容し、上流側に向かう前記液体の流動を制限する第１一方向弁と、
前記分岐流路に設けられ、駆動時には前記循環流路内で前記液体を循環し、駆動停止時には前記分岐流路を開放した状態で停止する循環送液部と、
前記分岐流路における前記循環送液部と前記第２接続部との間、および、前記第１供給流路における前記第１接続部より下流のいずれかに一端が接続され、前記液体吐出部に他端が接続される複数の第２供給流路と、
を備えることを特徴とする液体吐出装置。 a liquid ejection unit capable of ejecting liquid;
a first supply channel having an upstream end connected to a liquid storage section that stores the liquid and capable of supplying the liquid from an upstream side where the liquid storage section is provided to a downstream side where the liquid ejection section is provided;
connected to a first connection part provided in the middle of the first supply channel and a second connection part provided downstream of the first connection part of the first supply channel, A branched flow path that constitutes a circulation flow path between
an on-off valve provided between the liquid containing portion and the first connecting portion in the first supply channel;
A first one-direction provided between the on-off valve and the first connecting portion in the first supply channel to allow the flow of the liquid toward the downstream side and restrict the flow of the liquid toward the upstream side a valve;
a circulating liquid feeding unit provided in the branch flow path, circulating the liquid in the circulation flow path during driving, and stopping with the branch flow path open when driving is stopped;
One end is connected between the circulating liquid feeding section and the second connection section in the branch flow path, or downstream from the first connection section in the first supply flow path, and the liquid discharge section is connected to the a plurality of second supply channels to which the other ends are connected;
A liquid ejection device comprising: 前記循環送液部は、前記第１接続部側から前記第２接続部側へ前記分岐流路内の前記液体を流動させることを特徴とする請求項１に記載の液体吐出装置。 2. The liquid ejecting apparatus according to claim 1, wherein the circulating liquid feeding section causes the liquid in the branch flow path to flow from the first connecting section side to the second connecting section side. 前記分岐流路における前記循環送液部と前記第２接続部との間に設けられ、下流側に向かう前記液体の流動を許容し、上流側に向かう前記液体の流動を制限する第２一方向弁を更に備えることを特徴とする請求項２に記載の液体吐出装置。 A second one-direction provided between the circulating liquid-feeding portion and the second connecting portion in the branch flow channel to allow the liquid to flow downstream and restrict the liquid to flow upstream. 3. The liquid ejector of claim 2, further comprising a valve. 前記循環送液部は、前記第２接続部側から前記第１接続部側へ前記分岐流路内の前記液体を流動させることを特徴とする請求項１に記載の液体吐出装置。 2. The liquid ejecting apparatus according to claim 1, wherein the circulating liquid feeding section causes the liquid in the branch flow path to flow from the second connecting section side to the first connecting section side. 前記第１供給流路において、前記開閉弁および前記第１接続部との間に設けられ、前記液体を貯留可能な第１貯留部を更に備えることを特徴とする請求項１～請求項４のうち何れか一項に記載の液体吐出装置。 5. The method according to any one of claims 1 to 4, further comprising a first storage portion provided between the on-off valve and the first connection portion in the first supply flow path and capable of storing the liquid. The liquid ejecting apparatus according to any one of the items. 前記分岐流路において、前記液体が循環する循環方向における前記循環送液部よりも下流側に設けられ、前記液体を貯留可能な第２貯留部を更に備えることを特徴とする請求項１～請求項５のうち何れか一項に記載の液体吐出装置。 In the branch flow path, a second storage section is provided downstream of the circulating liquid feeding section in a circulation direction in which the liquid circulates, and is capable of storing the liquid. Item 6. The liquid ejection device according to any one of Item 5. 複数の前記第２供給流路にそれぞれ設けられ、下流側が所定の負圧になることで前記第２供給流路を開放する圧力調整弁を更に備えることを特徴とする請求項１～請求項６のうち何れか一項に記載の液体吐出装置。 Claims 1 to 6, characterized by further comprising a pressure regulating valve provided in each of the plurality of second supply channels and opening the second supply channels when the downstream side becomes a predetermined negative pressure. The liquid ejection device according to any one of the above. 液体を吐出可能な液体吐出部と、
前記液体を収容する液体収容部に上流端が接続され、前記液体収容部が設けられる上流側から前記液体吐出部が設けられる下流側へ前記液体を供給可能な第１供給流路と、
前記第１供給流路の途中に設けられる第１接続部と、前記第１供給流路の前記第１接続部より下流に設けられる第２接続部と、に接続され、前記第１供給流路との間で循環流路を構成する分岐流路と、
前記第１供給流路における前記液体収容部と前記第１接続部との間に設けられる開閉弁と、
前記第１供給流路における前記開閉弁と前記第１接続部との間に設けられ、下流側に向かう前記液体の流動を許容し、上流側に向かう前記液体の流動を制限する第１一方向弁と、
前記分岐流路に設けられ、駆動時には前記循環流路内で前記液体を循環し、駆動停止時には前記分岐流路を開放した状態で停止する循環送液部と、
前記分岐流路における前記循環送液部と前記第２接続部との間、および、前記第１供給流路における前記第１接続部より下流のいずれかに一端が接続され、前記液体吐出部に他端が接続される複数の第２供給流路と、
を備える液体吐出装置の制御方法であって、
前記循環流路内で前記液体の循環を行う場合には、
前記開閉弁により前記第１供給流路を閉鎖した状態で前記循環送液部を駆動させて循環を行い、
前記液体吐出部に前記液体を供給する場合には、
前記循環送液部の駆動を停止して前記分岐流路を開放するとともに前記開閉弁により前記第１供給流路を開放することで、前記第１供給流路および前記分岐流路を介して前記液体吐出部に前記液体を供給することを特徴とする液体吐出装置の制御方法。 a liquid ejection unit capable of ejecting liquid;
a first supply channel having an upstream end connected to a liquid containing portion that contains the liquid and capable of supplying the liquid from an upstream side where the liquid containing portion is provided to a downstream side where the liquid discharge portion is provided;
connected to a first connection part provided in the middle of the first supply channel and a second connection part provided downstream of the first connection part of the first supply channel, A branched flow path that constitutes a circulation flow path between
an on-off valve provided between the liquid containing portion and the first connecting portion in the first supply channel;
A first one-direction provided between the on-off valve and the first connecting portion in the first supply channel, allowing the liquid to flow toward the downstream side and restricting the flow of the liquid toward the upstream side. a valve;
a circulating liquid feeding unit provided in the branch flow path, circulating the liquid in the circulation flow path during driving, and stopping with the branch flow path open when driving is stopped;
One end is connected between the circulating liquid feeding section and the second connection section in the branch flow path, or downstream from the first connection section in the first supply flow path, and the liquid discharge section is connected to the a plurality of second supply channels to which the other ends are connected;
A control method for a liquid ejection device comprising
When circulating the liquid in the circulation channel,
circulating by driving the circulating liquid feeding unit in a state in which the first supply channel is closed by the on-off valve;
When supplying the liquid to the liquid ejection part,
By stopping the driving of the circulating liquid feeding unit to open the branch flow path and opening the first supply flow path by the on-off valve, the A method of controlling a liquid ejecting apparatus, comprising supplying the liquid to a liquid ejecting portion.
JP2022026715A 2022-02-21 2022-02-24 Liquid discharge device and control method of liquid discharge device Pending JP2023122937A (en)

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JP2022026715A JP2023122937A (en) 2022-02-24 2022-02-24 Liquid discharge device and control method of liquid discharge device
CN202310147385.3A CN116619910A (en) 2022-02-21 2023-02-20 Liquid discharge device control method and liquid discharge device
US18/171,877 US20230264476A1 (en) 2022-02-21 2023-02-21 Method of controlling a liquid ejecting device and liquid ejecting device

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