JP2018122272A - Liquid discharge device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a liquid discharge device that can discharge liquid accurately, without air bubbles residing in a channel.SOLUTION: A liquid discharge device continuously pumps liquid, through a liquid feed channel 31, from the upper side to the lower side vertically as a whole, and discharges the liquid from an open end 32 of the liquid feed channel 31. The liquid feed channel 31 comprises a plurality of continuous channel segments 33, 34, 35, 36, 37, with adjacent channel segments having different angles of inclination.SELECTED DRAWING: Figure 4

Description

  The present invention relates to a liquid ejecting apparatus that ejects a liquid pumped through a tubular liquid feeding channel from the open end of the liquid feeding channel with quantitativeness.

  There are various known liquid ejection devices that aim to eject liquid, which has been pumped via a tubular liquid flow channel, from the open end of the liquid flow channel with quantitativeness. These are known for the purpose of measuring the liquid, and those that use the liquid as a raw material to form powders and granules having a predetermined shape, size and mass, and capsules having a multilayer structure, and the like. .

  For example, the core liquid and the shell liquid are pressure-fed to a liquid discharge apparatus having a double nozzle as shown in Patent Document 1, and each liquid is discharged from the double nozzle and cooled, whereby the core liquid is wrapped in the shell liquid. Shaped multilayered capsules can be produced. At that time, as shown in FIG. 9, the integrated flow path 92 of the core liquid is distributed to the plurality of flow paths 93, and the integrated flow path 94 of the shell liquid is distributed to the plurality of flow paths 95. By simultaneously discharging the core liquid and the shell liquid from the respective discharge nozzles 91 of the liquid discharge apparatus (multilayer capsule manufacturing apparatus) 90 in which are arranged, it is possible to manufacture a large number of multilayer structure capsule bodies in a short time. .

JP 2008-11765 A

  In such a liquid ejection device that requires quantitativeness, there has been a problem that inhibition of quantitativeness due to the influence of bubbles present in the liquid feeding flow path becomes a problem. The following can be considered as the generation factors of the bubbles.

  The first factor is a phenomenon called so-called air biting that occurs when the liquid is exchanged. It is relatively frequent to discharge the liquid in the liquid supply flow path once and to introduce the liquid again into the liquid supply flow path that has become a gap for changing the product type or cleaning the liquid supply flow path in the liquid discharge device. To be done. At this time, the air in the pipe remaining in the bent portion or the narrow portion in the liquid feeding flow path may remain as bubbles.

  The second factor is a case where bubbles remain in the liquid itself introduced into the liquid feeding channel. Normally, the remaining bubbles are often removed by so-called defoaming treatment, but there are cases where bubbles that cannot be removed still remain.

  Furthermore, the gas component dissolved in the liquid may vaporize into bubbles in the course of liquid feeding.

  Now, the liquid in the liquid feed flow path is usually pumped or sucked by a pressure feed source such as a pump, and if there are bubbles in the liquid feed, only a few bubbles remain with the feed pressure. However, it may be deformed. As a result, depending on the presence or absence of residual bubbles and the amount of residual bubbles, the substantial pressure or pressure acting on the liquid may fluctuate, resulting in fluctuations in the amount of liquid delivered. In addition, when the size of the bubble is considerably larger than the inner dimension of the liquid feeding channel, or when a large amount of bubbles is present in a considerable amount, the flow rate of the liquid feeding channel is reduced. Variations in liquid volume are also possible.

  Furthermore, when the liquid supply flow path has a structure in which liquid is branched from the integrated flow path to a plurality of liquid supply flow paths, the flow branches depending on the amount of bubbles remaining in each liquid supply flow path. There may be a problem in that a difference occurs in the pressure supplied to each liquid supply flow path, resulting in a difference in the amount of liquid supply branched.

  As described above, if bubbles remain in the liquid supply flow path, the quantitative property of the liquid flowing in the liquid supply flow path may be hindered, and as a result, the liquid cannot be accurately measured. There may be a problem that the size, mass, shape, and the like of the powder, granules, and capsules to be formed vary.

  Some liquid ejecting apparatuses eject liquid flowing through a liquid feeding channel into a liquid of a system different from the liquid. In such a configuration, since the liquid on the side to be discharged becomes resistance to pressure feeding, there is a case where bubbles are more likely to be deformed and more susceptible to bubbles.

  The present invention has been made in view of the above problems, and an object of the present invention is to provide a liquid ejecting apparatus that can eject liquid with high accuracy without causing bubbles to stay in the flow path.

  In order to solve the above-described problem, the liquid ejection device of the present invention continuously feeds liquid from vertically upward to vertically downward via a liquid supply flow path, and the liquid discharge apparatus from the open end of the liquid supply flow path In the liquid discharge apparatus for discharging a liquid, the liquid supply flow path is composed of a plurality of continuous sub-channels, and the adjacent sub-channels have different inclination angles.

  According to the liquid ejecting apparatus, it is possible to eject liquid with high accuracy without causing bubbles to stay in the flow path. Specifically, since the liquid feeding flow path is composed of a plurality of continuous sub-channels, the bubbles are pushed back into the downstream sub-channels without being pushed back in each sub-channel. Therefore, it is possible to prevent bubbles from staying in the flow path.

  Further, at least one of the plurality of sub-channels is a vertical sub-channel that pumps the liquid vertically downward, and at least one of the plurality of sub-channels is a horizontal sub-flow that pumps the liquid in the horizontal direction. It may be a road.

  By combining the sub-channel with a large inclination and the sub-channel with a small inclination in this way, a liquid-feed channel that can prevent bubbles from being retained with a shorter channel length can be formed.

  The open end may be present at one lower end of the vertical sub-channel, and the liquid may be discharged into a liquid having a specific gravity different from that of the liquid.

  Thus, by discharging the liquid into the liquid from the vertical sub-channel, the liquid discharged from the open end can be accurately formed into a spherical shape in the liquid.

  In addition, the integrated flow path has a plurality of liquid supply flow paths, the integrated flow path is located upstream of the plurality of liquid supply flow paths, and the plurality of liquid supply flow paths branch from the integrated flow path. You may make it do.

  By doing this, even if bubbles are generated in each liquid supply flow path, they are released immediately. Therefore, it is possible to prevent variation in the liquid supply amount to each liquid flow path due to the retention of the bubbles, and a uniform liquid discharge amount Can be maintained.

  Further, the liquid supply system includes a plurality of liquid supply systems, and the open end belonging to one of the plurality of liquid supply systems is a circular open end having a circular cross section, and belongs to another liquid supply system. The open end may be a ring-shaped open end having a ring-shaped cross section provided concentrically with the circular open end.

  By doing so, it is possible to accurately form a spherical capsule body in which the liquid discharged from the circular open end is wrapped with the liquid discharged from the ring-shaped open end in the liquid.

  In addition, the liquid feeding flow path may be formed by stacking a plurality of plates, and at least a part of the plurality of subdivided flow paths may extend to a stacking interface of the plurality of plates.

  Furthermore, it is preferable that the sub-channels extending to the stacking interface of the plates are provided only in the upper plate constituting the stacking interface and have a substantially kamaboko-shaped cross section having a convex surface vertically upward.

  By doing so, it is possible to accurately form a liquid feed passage having a fine cross-sectional area.

  As a method for removing bubbles remaining or generated in the liquid supply flow path, it is the simplest and general method to push the bubbles toward the downstream in the liquid supply direction with the dynamic pressure of the liquid. At this time, for the purpose of discharging bubbles, it is often performed to temporarily increase the pressure and flow rate of the liquid supply passage.

  Now, naturally, buoyancy acts on the bubbles present in the liquid feed flow path, and the bubbles try to float vertically upward. Therefore, when the liquid feeding direction is vertically downward, the buoyancy and the dynamic pressure of the liquid are opposed to each other, and depending on the properties of the liquid to be fed, the pressure and flow rate of the liquid feeding channel are increased. However, there are cases where it is difficult to flush away the bubbles.

  The first gist of the present invention is to reduce the vector component opposite to the liquid feeding direction of the buoyancy by providing the liquid feeding flow path with an inclination angle, thereby facilitating the flushing by the dynamic pressure of the liquid. .

  Furthermore, if the liquid supply flow path has an inclination angle, it is easy to push the bubbles depending on the dynamic pressure, but the liquid supply flow path and thus the projected area in the Z-axis direction shown in FIG. In some cases, the liquid flow path and the discharge device become large. Therefore, by using a combination of sub-channels with an inclination angle and vertical channels without an inclination angle, or a combination of sub-channels with different inclination angles, it is possible to facilitate the flow of bubbles by the inclination angle. The second gist of the invention of the present application is to avoid the problem of enlargement of the liquid supply flow path and the discharge device described above while exhibiting the effect.

  The inclination angle referred to in the present specification is assumed to be in a direction in which the vertical downward direction is 0 degree and increases vertically upward. That is, the horizontal direction is 90 degrees, and the vertically upward direction is 180 degrees.

  According to the liquid ejection device of the present invention, it is possible to accurately eject a liquid without causing bubbles to stay in the flow path.

It is the schematic which shows the liquid discharge apparatus in one Embodiment of this invention. It is a bottom view of the discharge nozzle of this embodiment. It is the schematic of the aspect in which a capsule body is formed with the liquid discharge apparatus of this embodiment. It is the schematic of the liquid feeding flow path in the liquid discharge apparatus of this embodiment. It is the schematic of the liquid feeding flow path in other embodiment. It is the schematic of the liquid feeding flow path in other embodiment. It is the schematic of the liquid feeding flow path in other embodiment. It is the schematic of the liquid feeding flow path in other embodiment. It is the schematic which shows the conventional liquid discharge apparatus. It is the schematic of the liquid feeding flow path in the conventional liquid discharge apparatus.

  Embodiments according to the present invention will be described with reference to the drawings.

  FIG. 1 is a schematic view of a liquid ejection apparatus for carrying out the present invention.

  The liquid discharge apparatus 1 includes a plurality of (three in FIG. 1) discharge nozzles 2, an integrated flow path 3, and an integrated flow path 4, and a liquid feed flow path 31 branched from the integrated flow path 3 and an integrated flow path 4 The liquid supply passages 41 branched from each other communicate with the respective discharge nozzles 2, and an open end 32 of the liquid supply passage 31 and an open end 42 of the liquid supply passage 41 are provided at the lower end of the discharge nozzle 2. As a result, the liquid pressure-fed from the integrated flow path 3 and the integrated flow path 4 is equally distributed to the liquid supply flow path 31 and the liquid supply flow path 41 to fill the liquid supply flow path 31 and the liquid supply flow path 41. Then, the liquid is discharged downward from each discharge nozzle 2 through the liquid supply passage 31 and the liquid supply passage 41.

  FIG. 2 is a bottom view of the discharge nozzle 2 in the present embodiment.

  The open end 32 of the liquid feeding flow path 31 is a circular open end that is located at the center of the nozzle 2 and has a circular cross section. Further, the open end 42 of the liquid supply flow path 41 is a ring-shaped open end having a ring-shaped cross section provided concentrically with the open end 32 so as to surround the open end 32, and the piping of the liquid supply flow path 41 The liquid which is connected to the part at two locations and is pumped is spread in a ring shape at the open end 42 and discharged.

  When the liquid ejecting apparatus 1 is a multilayer capsule manufacturing apparatus, the open end 32 at the center of the ejecting nozzle 2 is flowed as shown in FIG. 3 by flowing the core liquid in the integrated flow path 3 and flowing the shell liquid in the integrated flow path 4. The core liquid is discharged from the open end, and the shell liquid is discharged from the open end 42. Then, the core liquid and the shell liquid are discharged in different coagulating liquids having a specific gravity smaller than that of the core liquid and the shell liquid, so that the core liquid is solidified in a form in which the core liquid is wrapped while sinking in the coagulating liquid. 10 can be obtained.

  In this description, the vertical direction is the Z-axis direction, and the direction in which the discharge nozzles are arranged in the horizontal direction is the Y-axis direction, and the direction orthogonal to both the Z-axis direction and the Y-axis direction is the X-axis direction.

  FIG. 4 is a schematic view of a liquid feeding flow path in the present embodiment. In FIG. 4, for the sake of easy understanding, the liquid supply flow path 41 is not shown and only the liquid supply flow path 31 is illustrated. However, in this embodiment, the liquid supply flow path 41 is also connected to the liquid supply flow path 31. It has the same characteristics.

  In the present embodiment, the liquid supply flow path 31 is formed from a pipe having a circular cross section, and a downstream open end 32 is provided in the most downstream portion, so that the liquid fed through the liquid supply flow path 31 is opened. The liquid is discharged downward from the end 32.

  Here, in the present invention, the liquid feeding channel 31 is composed of a plurality of continuous sub-channels, and the adjacent sub-channels have different inclination angles. In the present embodiment, the liquid supply flow path 31 includes a first sub-flow path 33, a second sub-flow path 34, a first sub-flow path 35, and a second sub-flow path in order from the one close to the open end 32. 36, a bent channel having a first sub-channel 37, and the liquid flowing through the liquid-feed channel 31 is the first sub-channel 37, the second sub-channel 36, and the first sub-channel 36. The gas is discharged from the open end 32 through the subdivided flow channel 35, the second subdivided flow channel 34, and the first subdivided flow channel 33 in this order.

  Here, in this description, a flow path in which the liquid traveling direction is a downward direction from the horizontal including the vertical downward direction is referred to as a first sub-channel, and the liquid traveling direction is the horizontal direction or upward from the horizontal. The flow path in the direction of is called the second sub-flow path. In the present embodiment, the liquid supply channel 31 is formed by alternately combining the first sub-channel and the second sub-channel.

  In addition, the pipes that form each sub-channel are made of a material such as a metal such as stainless steel or a resin, and the bent shape of the liquid-feed channel 31 is maintained even when liquid is pumped to the liquid-feed channel 31. .

  In FIG. 4, when the bubbles 5 enter the first sub-channel 33, the bubbles 5 are pushed down by the dynamic pressure of the liquid pumped from the upstream and reach the open end 32, thereby causing the bubbles 5 from the sub-channel 33. Can be removed. However, when trying to push the bubbles 5 downward, an upward force is applied to the bubbles 5 due to the buoyancy of the bubbles 5.

  On the other hand, the bubble 5 is pushed back by the upward force with respect to the bubble 5 by making the liquid supply channel 31 into the combination of the subdivided channels 33 to 37 having different inclination angles between the adjacent subdivided channels as in the present invention. Thus, the bubble 5 can reach the downstream sub-channel before the behavior of staying in the sub-channel, and by repeating this, the bubble 5 reaches the open end 32 without remaining in the sub-channel.

  On the other hand, in the present embodiment, the first sub-channel that is a vertical sub-channel that pumps liquid vertically downward and the second sub-channel that is a horizontal sub-channel that pumps liquid horizontally are alternately combined. Therefore, the liquid and bubbles that have passed through the first sub-channel then enter the second sub-channel. The bubbles 5 that have entered the second subdivision channel are swept laterally by the dynamic pressure of the liquid.

  Here, the buoyancy acting on the bubbles 5 in each of the second sub-channels moves the bubbles 5 upward and presses them against the upper wall surface of the sub-channels as shown in the second sub-channel 34 in FIG. However, there is almost no effect on the lateral flow of the bubbles 5. Therefore, in each second sub-channel, the bubbles 5 are much easier to escape than each first sub-channel. Then, the bubbles 5 do not return from the second sub-channel to the first sub-channel on the upstream side, and the bubbles 5 are sent to the first sub-channel on the downstream side.

  Then, by applying the liquid feeding flow path 31 in which the bubbles 5 are easily removed as described above to each flow path branched from the integrated flow path 3, the bubbles 5 do not stay in each branch flow path. Here, if the bubbles 5 stay in one branch channel, the liquid hardly flows in the channel in which the bubbles 5 stayed, so that the amount of liquid fed to each branch channel is not uniform. Therefore, the discharge amount of the liquid differs for each discharge nozzle 2, and the size of the product obtained by discharging the liquid (for example, the multilayer capsule body 10 shown in FIG. 3) varies. In particular, when the liquid is discharged into the coagulating liquid as shown in FIG. 3, the discharge pressure fluctuates significantly when the bubbles 5 remain in the liquid supply flow path 31 because of the large resistance. On the other hand, by preventing the bubbles 5 from staying in all the liquid supply passages, it is possible to prevent the liquid supply amount to each branch flow path from being varied and to ensure uniform distribution. A uniform liquid discharge amount can be maintained.

  When the liquid is discharged in the liquid as shown in FIG. 3, the liquid flow direction of the sub-channel (first sub-channel 33 in FIG. 4) closest to the open end 32 is vertically downward. It is desirable. By doing so, the liquid discharged from the open end 32 can be accurately formed into a spherical shape in the coagulation liquid by the accompanying flow generated in the surrounding liquid. Similarly, with respect to the liquid supply channel 41, the spherical multi-layer capsule body 10 in which the spherical core liquid is wrapped with the shell liquid having an equal thickness is formed by making the subdivision channel closest to the open end 42 vertically downward. It can be formed with high accuracy.

  Further, as in the present embodiment, at least one of the plurality of sub-channels is a vertical sub-channel, and at least one of the plurality of sub-channels is a horizontal sub-channel, which is smaller than a sub-channel having a large slope. By combining with the subdivided flow path, it is possible to form a liquid supply flow path that can prevent bubbles from staying with a shorter flow path length.

  With the liquid ejection device 1 configured as described above, the liquid can be ejected with high accuracy without causing bubbles to stay in the flow path. Here, since the liquid feeding flow path 31 and the liquid feeding flow path 41 are easily connected to a liquid supply unit (not shown) and the liquid is frequently exchanged, there is a high possibility that the bubbles 5 will enter. The effect obtained by the liquid ejection device of the invention is increased.

  Next, the relationship between the length of each first sub-channel and the equivalent diameter will be described.

  Here, in this description, the diameter of a circle having the same area is defined as “equivalent diameter” for a calculation object having a predetermined area. For example, when the calculation object is a circle having a diameter of 1 mm, the equivalent diameter is left as it is. When the calculation target is a square with a side of 1 mm, the equivalent diameter is approximately 1.1 mm, which is the diameter of a circle having the same area as the square area (1 mm2).

  In the present embodiment, since the cross section of each flow path is circular, the inner diameter of the flow path becomes an equivalent diameter as it is.

  In this embodiment, the equivalent diameter of each first sub-channel and each second sub-channel is 0.5 mm, and the length of each first sub-channel is 10 mm.

  Table 1 below represents the ease of bubble removal from the channel with respect to the ratio of the length L1 of the first sub-channel 33 and the equivalent diameter d1 of the first sub-channel 33 as a representative. The ease of bubble removal is determined by constructing the liquid supply flow path 31 having a predetermined length and an equivalent diameter in each sub-flow path with a substantially transparent resin, and imaging the behavior of the bubbles in the liquid flowing through the flow path with a camera. The case where it was easily removed was indicated by “◯”, and the case where it was not easily removed and stayed in the flow path was indicated by “x”.

  As shown in Table 1, when L1 / d1 is 10 times or less, that is, when the length of the first sub-channel 33 is 10 times or less of the equivalent diameter of the first sub-channel 33, bubbles are easily removed, When L1 / d1 exceeded 10 times, bubbles were likely to stay.

  Here, in the case of the conventional example as shown in FIG. 10 and the condition that L1 / d1 exceeds 10 times, even if the bubbles 5 are swept downward in the upper part of the first sub-channel 33, the first sub-channel In the lower part of 33, the upward force wins and the bubbles 5 move upward, and there is a possibility that the bubbles 5 reciprocate up and down in the first subdivision channel 33.

  On the other hand, when L1 / d1 is 10 times or less, the length of the first sub-channel 33 is generated by the downward force due to the dynamic pressure of the liquid acting on the bubbles 5, the buoyancy, and the upward force due to the vortex. When the amplitude is shorter than the reciprocating amplitude of the air bubbles 5, the bubbles 5 do not stay in the first sub-channel 33 and are easily removed.

  In addition, the same result as the above can be applied to the first sub-channel 35 and the first sub-channel 37. When L2 / d2 and L3 / d3 are 10 times or less, the first sub-channel Air bubbles easily escape from the flow path 35 and the first sub-flow path 37.

  Here, the vertical channel is divided into many sub-channels, and the effect of discharging bubbles in each first sub-channel increases as the length of each first sub-channel decreases. Accordingly, it is necessary to provide a large number of first sub-channels, and the entire pipe length tends to be long. Therefore, it is preferable that at least the length of each first sub-channel is at least one times the equivalent diameter.

  Note that the effect of the bubbles remaining in the flow channel on the amount of liquid discharged from the open end of the discharge nozzle becomes more prominent as the flow channel becomes finer. Therefore, the form of the liquid supply flow path in which the first sub-flow path and the second sub-flow path are alternately combined as described in this description is applied to a fine flow path having an equivalent diameter of 5 mm or less. Is particularly preferred.

  With the above liquid ejecting apparatus, it is possible to eject liquid with high accuracy without causing bubbles to stay in the flow path.

  Here, the liquid ejection apparatus of the present invention is not limited to the above-described form, and may be another form within the scope of the present invention. For example, in this embodiment, the cross section of each flow path is circular, but is not limited thereto, and may be a cross section having a shape other than a circle, such as a rectangle or a semicircle. In that case, the effect of efficiently discharging bubbles can be obtained by calculating the equivalent diameter as described above and setting the length of each sub-channel to 1 to 10 times the equivalent diameter.

  Further, in this embodiment, the equivalent diameter of the first sub-channel 33, the equivalent diameter of the first sub-channel 35, and the first sub-channel 37 are uniform, but different equivalent diameters may be used. If the length of the subdivided channel is 1 to 10 times the equivalent diameter, the effect of efficiently discharging bubbles can be obtained.

  In this embodiment, as shown in FIG. 4, the liquid that has passed through the flow path branched from the integrated flow path 3 is the first sub-flow path 37, the second sub-flow path 36, the first sub-flow path 35, Discharge is made through the second sub-channel 34 and the first sub-channel 33, but the first sub-channel 37 and the second sub-channel 36 are eliminated, and the flow is branched from the integrated channel 3. The liquid that has passed through the channel may be discharged through the first sub-channel 35, the second sub-channel 34, and the first sub-channel 33.

  Further, as shown in FIG. 5, the second sub-channel 34 and the second sub-channel 36 may have a liquid traveling direction upward (not horizontal) rather than horizontal. By doing so, the buoyancy naturally moves to the higher side, that is, the downstream side, so that the bubbles 5 are more reliably prevented from returning to the upstream first sub-channel 35, and the first sub-channel It becomes easy to move to 33. Similarly, the second subdivided flow path 36 prevents the bubbles 5 from returning to the first subdivided flow path 37 and facilitates movement toward the first subdivided flow path 35. Further, the central axes of the first sub-channel 33 and the first sub-channel 37 do not necessarily have to coincide with each other.

  Further, the first sub-channel and the second sub-channel may not be in a straight line, and each sub-channel may be bent. For example, in FIG. 6, the first sub-channel 35 is formed by the sub-channel 35A and the sub-channel 35B in which the liquid traveling direction is a downward direction from the horizontal. Even when the subdivided flow channel 35A or the subdivided flow channel 35B is a subdivided channel having components in the horizontal direction and the downward direction, it is possible to mitigate the air bubbles being pushed back upward. Therefore, even if the entire liquid supply flow path is formed by only the subdivided flow paths having components in the horizontal direction and the downward direction, such as the subdivided flow path 35A and the subdivided flow path 35B, the liquid supply flow path that prevents air bubbles from staying. Can be formed.

  Further, the liquid supply passage 31 may be formed by laminating a plurality of plates 51 to 55 as shown in FIG. Although it is extremely difficult to squeeze the bent liquid feeding flow path as shown in FIG. 8A into an integral material lump instead of the combination of the plates 51 to 55, it is difficult to squeeze this into a plurality of plates 51 to 55. The first sub-channels 37, 35, 33 vertical in the figure can be formed simply by drilling each of the divided plates 51 to 55, and the second sub-channel 34 in the horizontal direction, 36 can be easily formed only by grooving only one or both of the opposing surfaces of the plates 52 and 53 and 54 and 55.

  When grooving is performed only on one of the sides, it may be preferable that both grooving positions need not be relatively aligned as compared to grooving on both sides.

  Further, according to the study by the present inventors, a substantially semi-cylindrical cross-sectional shape having a convex surface vertically upward only on the plate existing on the upper side like the AA cross section of the plate 53 of FIG. 8A shown in FIG. 8B. It has been found that the above-described subdivided flow channel is advantageous in that the effect of facilitating the above-described removal of bubbles in the portion can be obtained.

  In this way, it is preferable that at least a part of the subdivided channels is extended to the laminated interface of the divided plates because the processing becomes easy.

  In addition, when two types of liquid supply flow paths are provided as shown in FIG. 1, it is not always necessary to apply the present invention to both flow paths. For example, only the flow path for flowing the core liquid has a high occurrence frequency of bubbles. You may apply this invention only to a flow path.

DESCRIPTION OF SYMBOLS 1 Liquid discharge apparatus 2 Discharge nozzle 3 Integrated flow path 4 Integrated flow path 5 Air bubble 10 Multilayer capsule body 31 Liquid supply flow path 32 Open end 33 1st subdivision flow path 34 2nd subdivision flow path 35 1st subdivision flow path 35A Subdivided channel 35B Subdivided channel 36 Second subdivided channel 37 First subdivided channel 41 Liquid feed channel 42 Open end 51 Plate 52 Plate 53 Plate 54 Plate 55 Plate 90 Liquid discharge device 91 Discharge nozzle 92 Integrated flow Path 93 liquid flow path 94 integrated flow path 95 liquid flow path 96 bubble

Claims (7)

A liquid discharge device that continuously pumps liquid from vertically upward to vertically downward via a liquid supply flow path and discharges the liquid from an open end of the liquid supply flow path.
The liquid delivery device according to claim 1, wherein the liquid supply channel is configured by a plurality of continuous sub-channels, and the sub-channels adjacent to each other have different inclination angles.   At least one of the plurality of sub-channels is a vertical sub-channel that pumps the liquid vertically downward, and at least one of the plurality of sub-channels is a horizontal sub-channel that pumps the liquid in the horizontal direction. The liquid ejecting apparatus according to claim 1, wherein the liquid ejecting apparatus is provided.   The liquid discharge device according to claim 2, wherein the open end exists at one lower end of the vertical sub-channel, and discharges the liquid into a liquid of a system different from the liquid.   An integrated channel and a plurality of the liquid-feeding channels; the integrated channel is located upstream of the plurality of the liquid-feeding channels; and the plurality of liquid-feeding channels branch from the integrated channel. The liquid discharge apparatus according to claim 1, wherein   The open end belonging to one of the plurality of liquid supply systems is a circular open end having a circular cross section, and the open end belonging to another liquid supply system. 5. The liquid discharge apparatus according to claim 3, wherein the liquid discharge device is a ring-shaped open end having a ring-shaped cross section provided concentrically with the circular open end.   6. The liquid feeding channel is formed by laminating a plurality of plates, and at least a part of the plurality of subdivided channels extends to a laminating interface of the plurality of plates. The liquid discharge apparatus according to any one of the above.   The sub-channels extending to the stacking interface of the plates are provided only in the vertically positioned plate constituting the stacking interface, and have a substantially kamaboko-shaped cross section having a convex surface vertically upward. The liquid ejection apparatus according to claim 6, wherein:

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