JP2006076189A - Inkjet recording device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To prevent a non-ejection of an ink due to air bubbles by suppressing the generation of air bubbles in an inkjet recording device. <P>SOLUTION: An inkjet print head 15 is connected with an ink feeding path 34 in which a filter having a plurality of holes is provided, and selectively discharges ink droplets from a plurality of nozzles 14. For a plurality of the nozzles 14 of the inkjet print head 15 in which a liquid is filled, a suction motion by a maintenance mechanism 32 is executed by a first suction force which forms a meniscus of the liquid to all of a plurality of the holes on the filter. Under a state that the meniscuses have been formed on all of a plurality of the holes, a suction motion by the maintenance mechanism 32 is executed by a second suction force which breaks all the meniscuses. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to an ink jet recording apparatus.

  2. Description of the Related Art An ink jet recording apparatus such as a printer or a copying machine includes an ink jet print head that selectively ejects ink droplets from a plurality of nozzles, an ink tank that stores ink, and the like. Such an ink jet recording apparatus is an apparatus for recording an image on a recording medium such as plain paper or coated paper by an ink jet print head.

  Among inkjet recording apparatuses, apparatuses that allow users to replace inkjet print heads, ink tanks, and the like have been developed in consideration of user convenience and economy. In such an ink jet recording apparatus, various inconveniences such as poor ink filling, damage to the ink jet print head, or contamination of the ink jet print head with ink may occur due to user replacement operations. There is.

  Therefore, in order to prevent the user from touching the ink jet print head or the like, an ink jet print head filled with a liquid such as logistics ink or a solvent is added to the ink jet recording apparatus in accordance with improvement in reliability and durability of the ink jet print head. An apparatus that has been incorporated so that it cannot be removed has been developed (see Patent Document 1). Such an ink jet recording apparatus is left for a considerable time until the user starts using the apparatus. Due to the change in the ink composition due to the standing time and the environmental change, the change in the ink viscosity due to the sealing property, etc., the ink jet recording apparatus can record an image satisfactorily.

  In order to prevent this, when the user starts to use the ink jet recording apparatus, liquid such as distribution ink or solvent in the ink jet print head is replaced with recording ink in the ink tank. As this ink replacement method, in Japanese Patent Application Laid-Open No. H10-260260, ink replacement is performed by capping the nozzles of an ink jet print head so that the nozzle is sealed, and sucking ink with a negative pressure inside the cap by a negative pressure generator such as a pump. ing. In particular, by increasing the negative pressure in the cap or increasing the number of times of suction, ink that has changed in ink composition and has become highly viscous can be sucked.

  Further, the ink jet recording apparatus includes an ink supply path for supplying ink from an ink tank to the inside of the ink jet print head, a filter provided in the ink supply path, for removing foreign matters from the ink, and the like. Innumerable small holes are formed in this filter.

JP 2002-283590 A

  However, as in Patent Document 1, in order to increase the negative pressure in the cap, it is necessary to completely seal the nozzle of the inkjet print head when capping, and the mechanism and control become complicated.

  In addition, when the liquid is sucked at a stretch by the negative pressure as in Patent Document 1, the liquid meniscus formed in innumerable small holes tends to become unstable when the liquid passes through the filter, and as a result, bubbles are formed. Will occur.

  That is, when the liquid is sucked all at once by the negative pressure, as shown in FIG. 8, in the filter 100, the small hole 101a in which the meniscus M of liquid (shaded portion) is formed and the meniscus M of liquid is not formed ( A small hole 101b that has been destroyed). At this time, since the liquid continues to be sucked, air enters the liquid from the small hole 101b where the meniscus M is not formed, and bubbles are generated.

  The generated bubbles move from the vicinity of the filter 100 to the inside of the ink jet print head together with the liquid, and remain in the vicinity of the nozzle. Thereafter, even if the recording ink is filled in the ink jet print head, the bubbles remain in the ink jet print head. For this reason, non-ejection of ink occurs due to the remaining bubbles, and as a result, printing failure occurs.

  An object of the present invention is to prevent the occurrence of non-ejection of ink due to bubbles by suppressing the generation of bubbles in an inkjet recording apparatus.

  The present invention is a head for selectively ejecting ink contained therein as a plurality of nozzles from a plurality of nozzles, an ink jet print head in which liquid is filled, and communication with the inside of the ink jet print head. A path for supplying the ink to the inside of the ink jet print head, an ink supply path filled with a liquid therein, and a plurality of holes provided in the ink supply path, the ink having a plurality of holes A filter that filters the ink flowing through the supply path, a suction unit that performs a suction operation with a predetermined suction force on the plurality of nozzles of the inkjet print head, and the plurality of the filters as the predetermined suction force A first suction force that forms the liquid meniscus in all of the holes and causes the suction portion to perform the suction operation. After the suction operation of the suction part by the line means and the first execution means, a second suction force that simultaneously destroys all the meniscuses formed in the plurality of holes of the filter as the predetermined suction force And second execution means for causing the suction part to execute the suction operation.

  According to the present invention, the liquid meniscus is formed in all of the plurality of holes of the filter in the course of the suction operation by the suction unit, and then all the meniscus is destroyed at the same time, so that bubbles are generated in the filter part. Absent. Thereby, generation | occurrence | production of the non-ejection of an ink by a bubble can be prevented by suppressing generation | occurrence | production of a bubble.

  The best mode for carrying out the present invention will be described with reference to FIGS. The ink jet recording apparatus of the present embodiment is an example of a recording apparatus that performs color printing on a sheet that is a recording medium. As the paper, for example, plain paper, coated paper, an OHP sheet, or the like can be used.

  FIG. 1 is a longitudinal side view schematically showing the ink jet recording apparatus of the present embodiment, and FIG. 2 is a longitudinal side view schematically showing an ink jet print head provided in the ink jet recording apparatus.

  As shown in FIG. 1, the ink jet recording apparatus 1 has a transport path P through which a sheet is transported in the housing 2. The conveyance path P is a path from the manual feed tray 3 or the paper cassette 4 to the lower discharge tray 6 or the upper discharge tray 7 via the printing unit 5. The printing unit 5 includes a drum 8 and a printing unit 9.

  The manual feed tray 3 and the paper cassette 4 are provided with a paper feed mechanism 10 that separates the sheets stacked on each of them and supplies them to the transport path P one by one. The transport path P is provided with a transport mechanism 11 that transports the paper supplied from the manual feed tray 3 or the paper cassette 4 by the paper feed mechanism 10 toward the lower discharge tray 6 or the upper discharge tray 7. . The transport mechanism 11 includes transport rollers 11A, 11B, 11C, and 11D. Further, the transport mechanism 11 includes a paper discharge mechanism 12 that distributes and discharges the paper on which printing has been performed in the printing unit 5 to the lower paper discharge tray 6 or the upper paper discharge tray 7. The paper is discharged to the paper tray 6 or the upper paper discharge tray 7.

  The printing unit 5 performs a printing operation for forming an image on a sheet based on print data by the printing unit 9 while rotating the drum 8 at a predetermined speed while the sheet is supported on the outer periphery of the drum 8. The printing unit 9 includes four nozzle units 13C (cyan), 13Y (yellow), 13M (magenta), and 13B (black). Each nozzle unit 13C, 13Y, 13M, 13B is an ink jet print head 15 (FIG. 2) that selectively ejects ink from a plurality of nozzles 14 (see FIG. 2) onto the paper transported by the transport mechanism 11. See).

  The printing unit 9 is arranged on the upper side of the drum 8 so that the nozzles 14 included in the inkjet print head 15 are opposed to the drum 8. The nozzle units 13C, 13Y, 13M, and 13B are provided around the drum 8 along the direction of rotation thereof, and 13C (cyan), 13Y (yellow), and 13M are sequentially arranged from the upstream side in the rotation direction of the drum 8. (Magenta) and 13B (black). The nozzle units 13 </ b> C, 13 </ b> Y, 13 </ b> M, and 13 </ b> B are arranged so that the arrangement direction of the nozzles 14 included in each inkjet print head 15 is parallel to the axial direction of the drum 8.

  Such a printing unit 9 is provided so as to reciprocate in the axial direction of the drum 8 and moves to a position not facing the drum 8, that is, a maintenance position. The maintenance position is a predetermined stop position of the printing unit 9. The inkjet recording apparatus 1 includes a control unit 16 that drives and controls each unit included in the inkjet recording apparatus 1.

  As shown in FIG. 2, the inkjet print head 15 includes a common ink chamber 21 that stores supplied ink, a plurality of pressure chambers 22 that respectively communicate with the common ink chamber 21 and store ink, and the pressure chambers 22. A nozzle plate 23 having a nozzle 14 that partially forms and communicates with the pressure chamber 22 is provided. Such an ink jet print head 15 performs printing on a sheet by causing the ink in the pressure chamber 22 to be ejected from the nozzles 14 as ink droplets by the volume change of the pressure chamber 22.

  The pressure chamber 22 is formed in a substrate (not shown) and has a plurality of grooves (not shown) that open on the front and upper surfaces, a top plate (not shown) that closes the upper surface of these grooves, and a plurality of pressure chambers. The nozzle plate 23 closes the front surface of the groove. The substrate on which the plurality of grooves are formed is formed by bonding two piezoelectric members polarized in the plate thickness direction so that the polarization directions are opposite to each other. In such a substrate, the plurality of grooves are formed by being processed along the stacking direction of the piezoelectric members. Each groove is partitioned in parallel by a side wall located between the grooves. An electrode (not shown) is provided on the inner surface of the groove, and this electrode is formed using, for example, an electroless nickel plating method. Further, the substrate is provided with a wiring pattern (not shown) continuous to the electrodes.

  In the common ink chamber 21, an ink supply port 24 for supplying ink into the chamber is formed. Ink is supplied from the ink supply port 24 to the common ink chamber 21. In the present embodiment, for example, liquid type inks such as water-based, oil-based, and ultraviolet curable types are used. Moreover, the ink of this Embodiment contains the pigment or dye etc. as a coloring material, for example.

  A plurality of nozzles 14 penetrating in the plate thickness direction are formed in the nozzle plate 23. The outer surface of the nozzle plate 23 functions as the nozzle surface 23a. The nozzles 14 are provided corresponding to the respective pressure chambers 22. The nozzle plate 23 is provided with an ink repellent layer (not shown) having ink repellent properties that repels ink. This ink repellent layer is provided on the entire surface of the nozzle surface 23 a including the peripheral surface of the nozzle 14. As a result, the straightness of ink droplet ejection can be stabilized.

  In the present embodiment, a protective member for protecting the nozzle plate 23 is not provided, but the present invention is not limited to this, and a protective member may be provided, for example. By providing the protective member, it is possible to prevent the nozzle plate 23 from being damaged or damaged, so that the basic characteristics of the head cannot be maintained. Furthermore, the protective member can prevent the nozzle plate 23 from being damaged such as scratches when adjusting the gap between the printing surface (paper) and the inkjet print head 15. Further, the protective member can exhibit a function of protecting the nozzle plate 23 against an external force that may be applied to the nozzle plate 23 when the inkjet print head 15 is transported, for example.

  FIG. 3 is a schematic diagram schematically showing an ink supply mechanism 31 and a maintenance mechanism 32 provided in the inkjet recording apparatus 1.

  As shown in FIG. 3, the inkjet recording apparatus 1 includes an ink supply mechanism 31 that supplies ink to the inkjet print head 15, a maintenance mechanism 32 that performs a maintenance operation on the inkjet print head 15, and the like.

  The ink supply mechanism 31 includes an ink tank 33 that individually stores each ink of cyan, yellow, magenta, and black, a plurality of ink supply paths 34 that respectively connect the ink tank 33 and each inkjet print head 15, and each ink supply path. A plurality of valves 35 that respectively open and close 34, a plurality of valves 36 that are provided on the downstream side (in the direction of ink flow) from the valve 35 and that respectively open the ink supply paths 34 to the atmosphere, and each ink jet from the ink tank 33. An ink pressure unit 37 that generates supply pressure for supplying ink to the print head 15 is provided. FIG. 3 illustrates the black inkjet print head 15, the ink supply path 34, and the like.

  Each of the plurality of ink supply paths 34 is provided with a filter unit 38 that removes foreign matters contained in the ink supplied to the inkjet print head 15. The filter unit 38 also functions as the ink supply path 34. Here, FIG. 4 is a longitudinal side view schematically showing the filter portion 38. As shown in FIG. 4, the filter unit 38 has a built-in filter 39 for filtering ink, and the filter 39 removes foreign matter from the ink passing through the inside. A plurality of holes 40 are formed in the filter 39 with a predetermined size. Thereby, the filter 39 has a filtration function of filtering ink.

  The ink pressure unit 37 communicates the pump 41 that generates supply pressure for supplying ink from the ink tank 33 to each inkjet print head 15, the pressure gauge 42 that measures the supply pressure, and the ink tank 33 and the pump 41. A pressure path 43 and a valve 44 for opening the pressure path 43 to the atmosphere are provided.

  Such an ink supply mechanism 31 supplies ink of corresponding colors from the ink tank 33 to the four inkjet print heads 15. At this time, the ink pressure unit 37 controls the supply pressure of the ink supplied to the inkjet print head 15. Thereby, the position of the ink liquid level in the nozzle 14 can be adjusted.

  The maintenance mechanism 32 is a printing unit 9 that stops at the maintenance position, that is, a cap 45 that covers and seals all the nozzles 14 of the four inkjet print heads 15, and the cap 45 with respect to the nozzle surface 23 a of the inkjet print head 15. A moving mechanism 46 that moves freely, a cap position detection sensor 47 that detects the position of the cap 45 in the contact / separation direction, a waste ink tank 48 that stores waste ink, and an ink discharge that communicates the cap 45 with the waste ink tank 48. A valve 49 for opening and closing the passage 49, the ink discharge passage 49, a pump (negative pressure generator) 51 for generating a suction force for sucking ink from the nozzle 14 to the cap 45, and a pressure gauge 52 for measuring the suction force. And a pressure path communicating the waste ink tank 48 and the pump 51. It is equipped with a 3, and the like.

  The cap 45 is provided so as to be able to contact with and separate from the nozzle surfaces 23 a of the four inkjet print heads 15. Such a cap 45 moves in contact with and separates from the nozzle surfaces 23 a of the four inkjet print heads 15 by the moving mechanism 46 and covers all of the nozzles 14.

  The moving mechanism 46 includes a cam 54 for pressing the cap 45 against the nozzle plate 23 of the inkjet print head 15 and a support member 55 that supports the cam 54. The cam 54 is rotatably provided on the support member 55, and rotates to press the cap 45 to contact the nozzle plate 23. In addition, as the cap position detection sensor 47, for example, a transmissive sensor, a reflective sensor, or the like is used.

  Such a maintenance mechanism 32 is configured such that the cap 45 is brought into contact with the print unit 9 stopped at the maintenance position, that is, the nozzle surfaces 23a of the four inkjet print heads 15 by the moving mechanism 46, and is all absorbed by the pump 51. The nozzle 14 is sucked and sucked. As a result, ink, coagulum, and the like that are the cause of clogging of the nozzle 14 are removed. The maintenance mechanism 32 functions as a suction unit.

  FIG. 5 is a block diagram schematically showing the electrical connection of each part of the inkjet recording apparatus 1.

  As illustrated in FIG. 5, the control unit 16 included in the inkjet recording apparatus 1 includes a CPU 61 that drives and controls each unit included in the inkjet recording apparatus 1 by executing various control programs, and a ROM and CPU 61 that store various control programs. A memory 62 such as a RAM functioning as a work area, an operation unit (control panel) 63 that receives an operation by an operator, a control circuit 64, and the like are connected via an I / O port 65.

  Connected to the control circuit 64 are the printing unit 5 (ink jet print head 15), valves 35, 36, 44, 50, pumps 41, 51, pressure gauges 42, 52, cap position detection sensor 47, drive unit 66, and the like. Yes. The drive unit 66 is a drive source for driving the paper feed mechanism 10, the transport mechanism 11, the moving mechanism 46, and the like.

  The control unit 16 controls each unit included in the inkjet recording apparatus 1 to cause each unit to execute a printing operation, a maintenance operation (suction operation), an ink replacement operation (a liquid draining operation, an ink filling operation), and the like. Note that the control unit 16 drives and controls each unit based on, for example, a signal output from the operation unit 63 in response to an operator (user) key operation or the like.

  The memory 62 has an area for storing various data referred to when the ink replacement operation is performed. In this area, for example, a set value P1 and a set value P2 for controlling the suction force by the pump 51, a set time A for holding the suction force at the set value P1, a set time B as a standby time, and a suction force are set. Various predetermined set values such as the set time C held in the value P2 are stored. The set value P <b> 1 is a value for causing the cap 45 to generate a first suction force that forms a liquid meniscus M (see FIG. 7) in all of the plurality of holes 40 of the filter 39. The set value P2 is a value for causing the cap 45 to generate a second suction force that simultaneously destroys the liquid meniscus M (see FIG. 7) formed in all of the plurality of holes 40. These set values P1, P2 and set times A, B, C are set based on the concentration of ink used, the hole diameter of the filter 39, and the like.

  In the ink jet recording apparatus 1 having such a configuration, for example, liquid such as physical distribution ink or solvent is filled in the ink jet print head 15, the ink supply path 34, and the like in a factory shipment state. Therefore, when the use of the ink jet recording apparatus 1 is started, it is necessary to replace liquids such as physical distribution ink and solvent with recording ink (ink in the ink tank 33). In this ink replacement operation, first, a maintenance mechanism 32 performs a liquid draining operation for draining liquids such as logistics ink and solvent from the ink jet print head 15 and the ink supply path 34, and then the ink supply mechanism 31 performs ink jet from the ink tank 33. An ink filling operation for filling the print head 15 with ink via the ink supply path 34 is performed. Such an ink replacement operation is executed when the printing unit 9 is in the maintenance position.

  Here, the liquid draining operation performed by the inkjet recording apparatus 1 will be described with reference to FIG. That is, a liquid draining process executed by the CPU 61 of the control unit 16 based on a program stored in the memory 62 will be described.

  FIG. 6 is a flowchart showing the flow of the liquid draining process, and FIG. 7 is a longitudinal side view schematically showing an enlarged part of the filter unit 38.

  As shown in FIG. 6, first, the CPU 61 waits for the start of the liquid draining process (N in step S1). Here, for example, the start of the liquid draining operation is declared by the operation of the operator (user) with respect to the operation unit 63. Then, the CPU 61 starts the liquid draining process (Y in Step S1), and moves the cap 45 from the standby position to the liquid draining position by the moving mechanism 46 (Step S2). The standby position is a position where the cap 45 does not hinder the movement of the printing unit 9. The liquid draining position is a position where the cap 45 abuts on the nozzle surfaces 23 a of the four inkjet print heads 15.

  Next, the CPU 61 closes the valve 35 (step S3), opens the valve 36 (step S4), and opens the valve 50 (step S5). The valve 35 may be closed in advance.

  Next, the CPU 61 turns on the pump 51 (step S6), determines whether or not the value of the pressure gauge 52 is the set value P1 of the memory 62 (step S7), and sets the value of the pressure gauge 52. The pump 51 is kept ON until the value P1 is reached (N in step S7). When the value of the pressure gauge 52 reaches the set value P1 (Y in step S7), the pump 51 is turned off (step S8). The CPU 61 determines whether or not the holding time for holding the value of the pressure gauge 52 at the set value P1 has passed the set time A of the memory 62 (step S9), and sets the value of the pressure gauge 52 to the set value P1. (N in step S9). At this time, even when the sealing by the cap 45 is not complete, the value of the pressure gauge 52 can be maintained at the set value P1. In addition, the function as a 1st execution means is performed by step S6-step S9.

  In such a process, the liquid such as the distribution ink and the solvent is sucked by the cap 45 by the first suction force, and the sucked liquid flows into the waste ink tank 48 through the ink discharge path 49. In this process, as shown in FIG. 7, the liquid meniscus M is uniformly formed in the plurality of holes 40 of the filter 39 by the surface tension, and the state is maintained.

  When the holding time elapses for the set time A (Y in step S9), the system then waits for the set time B to elapse for the liquid meniscus to stabilize (N in step S10). Thus, the next operation is not executed until the liquid meniscus is stabilized, so that the meniscus is reliably formed without being destroyed.

  When the standby time has elapsed by the set time B (Y in step S10), the CPU 61 turns on the pump 51 (step S11), and determines whether or not the value of the pressure gauge 52 is the set value P2 in the memory 62 ( In step S12), the pump 51 is kept ON until the value of the pressure gauge 52 reaches the set value P2 (N in step S12). When the value of the pressure gauge 52 reaches the set value P2 (Y in step S12), the pump 51 is turned off (step S13). The CPU 61 determines whether or not the holding time for holding the value of the pressure gauge 52 at the set value P2 has elapsed by the set time C of the memory 62 (step 14), and sets the value of the pressure gauge 52 to the set value P2. (N in step 14). At this time, even when the sealing with the cap 45 is not complete, the value of the pressure gauge 52 can be maintained at the set value P2. In addition, the function as a 1st execution means is performed by step S11-step S14.

  In such a process, all the meniscus M formed in the plurality of holes 40 of the filter 39 are simultaneously destroyed by the cap 45 sucked by the second suction force, and the remaining liquid is sucked. The sucked liquid flows into the waste ink tank 48 through the ink discharge path 49. At this time, all the meniscus M are destroyed at the same time, and the liquid in the plurality of holes 40 of the filter 39 is sucked at the same time, so that no bubbles are generated in the filter 39 portion.

  When the set time C has elapsed (Y in step S14), the cap 45 is moved from the liquid draining position to the standby position by the moving mechanism 46 (step S15). Thereafter, the CPU 61 performs an ink filling process for executing an ink filling operation by the ink supply mechanism 31. As a result, the recording ink is filled in the inkjet print head 15 from the ink tank 33, and the inkjet recording apparatus 1 is ready to perform a printing operation.

  As described above, in the present embodiment, the suction operation by the maintenance mechanism 32 is executed with the first suction force that forms the liquid meniscus M in all of the plurality of holes 40 of the filter 39, and the meniscus M is applied to all of the plurality of holes 40. With the second suction force that destroys all the meniscus M at the same time, the maintenance mechanism 32 performs a suction operation in the state where the liquid crystal is formed, so that the liquid in all the plurality of holes 40 of the filter 39 in the course of the suction operation. The meniscus M is formed and then all the meniscus M is destroyed at the same time, so that no bubbles are generated in the filter 39 portion. Thereby, generation | occurrence | production of the non-ejection of an ink by a bubble can be prevented by suppressing generation | occurrence | production of a bubble. Furthermore, even if the nozzles 14 of the inkjet print head 15 are not completely sealed, the liquid can be reliably removed, and the mechanism and control for suction can be simplified.

  Further, in the present embodiment, the maintenance mechanism 32 that is the suction portion is caused to perform a suction operation after the waiting time for stabilization of all the meniscus M formed in the plurality of holes 40 has elapsed. Can be reliably formed without being broken, so that bubbles can be reliably prevented from occurring in the filter 39 portion in the ink supply path 34. Further, even if bubbles are generated on the upstream side of the filter 39 (in the direction of ink flow), the generated bubbles are moved by the waiting time for the meniscus M to be stabilized and the ink supply path 34 is opened to the atmosphere. Since it goes out from 36, the bubble can be removed.

1 is a longitudinal side view schematically showing an ink jet recording apparatus according to an embodiment of the present invention. It is a vertical side view which shows roughly the inkjet print head with which an inkjet recording device is provided. FIG. 2 is a schematic diagram schematically showing an ink supply mechanism and a maintenance mechanism included in the ink jet recording apparatus. It is a vertical side view which shows a filter part roughly. It is a block diagram which shows roughly the electrical connection of each part with which an inkjet recording device is provided. It is a flowchart which shows the flow of a liquid removal process. It is a vertical side view which expands and schematically shows a part of filter part. It is a vertical side view which expands and schematically shows a part of filter part.

Explanation of symbols

14 Nozzle 15 Inkjet print head 32 Suction part (maintenance mechanism)
34 Ink supply path 38 Ink supply path (filter part)
39 filter 40 hole S6 to S9 first execution means S11 to S14 second execution means

Claims (2)

An ink jet print head in which ink contained therein is selectively ejected as ink droplets from a plurality of nozzles, and the interior is filled with liquid;
An ink supply path that communicates with the interior of the inkjet print head and that supplies the ink to the interior of the inkjet print head, the interior being filled with a liquid;
A filter provided in the ink supply path and having a plurality of holes for filtering the ink flowing through the ink supply path;
A suction unit that performs a suction operation with a predetermined suction force on the plurality of nozzles of the inkjet print head; and
First execution means for causing the suction section to perform the suction operation with a first suction force that forms the liquid meniscus in all of the plurality of holes of the filter as the predetermined suction force;
After the suction operation of the suction part by the first execution means, the suction part with a second suction force that simultaneously destroys all the meniscuses formed in the plurality of holes of the filter as the predetermined suction force Second executing means for causing the suction operation to be executed;
An inkjet recording apparatus comprising: The second execution unit causes the suction unit to perform the suction operation after a standby time for stabilizing all the meniscuses formed in the plurality of holes has elapsed.
The ink jet recording apparatus according to claim 1.

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