Drying equipment and printing equipment

Abstract

A drying device and a printing device capable of properly drying a medium are provided. [Solution] The drying device 13 comprises a drying furnace 47 into which the transported medium 99 enters, a heating section 53 that heats the medium within the drying furnace, an exhaust section 56 that exhausts air from the drying furnace, and a movable section configured to move, the drying furnace has an intake port through which air flows into the drying furnace from outside, and the exhaust section has a duct 57 extending from the drying furnace and a fan 58 that exhausts air from inside the drying furnace to outside the drying furnace through the duct, and the movable section moves to adjust at least one of the amount of air intake flowing in from the intake port and the amount of air exhausted from the drying furnace.

Description

[Technical Field]

[0001] The present invention relates to a drying device and a printing device. [Background technology]

[0002] Patent Document 1 describes a drying device that includes a heating section that heats a medium and an exhaust section that exhausts the medium. The drying device dries the medium by heating the medium with the heating section and exhausting steam generated from the medium with the exhaust section. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Publication No. 2020-2473 Summary of the Invention [Problem to be solved by the invention]

[0004] In such dryers, the exhaust volume may be excessive or insufficient depending on the installation environment. When a dryer is installed in a factory, the exhaust volume may be excessive or insufficient depending on the exhaust performance of the factory. If the exhaust volume of the dryer is excessive or insufficient, the dryer may not be able to properly dry the media. For example, if the exhaust volume of the dryer is insufficient, the temperature inside the dryer may rise, causing the media to become overheated. If the exhaust volume of the dryer is excessive, the temperature inside the dryer may drop, causing the media to dry insufficiently. [Means for solving the problem]

[0005] A drying device that solves the above problem comprises a drying furnace into which the transported medium enters, a heating section that heats the medium within the drying furnace, an exhaust section that exhausts air from the drying furnace, and a movable section that is configured to move, wherein the drying furnace has an intake port through which air flows into the drying furnace from outside the drying furnace, and the exhaust section has a duct extending from the drying furnace and a fan that exhausts air from inside the drying furnace to outside the drying furnace through the duct, and the movable section adjusts at least one of the amount of air intake that flows in through the intake port and the amount of air exhausted from the drying furnace by moving.

[0006] A drying device that solves the above problem comprises a drying furnace into which the transported medium enters, a heating section that heats the medium within the drying furnace, an exhaust section that exhausts air from the drying furnace, and a movable section that is configured to move, wherein the drying furnace has an intake port through which air flows into the drying furnace from outside the drying furnace, and the exhaust section has a duct extending from the drying furnace and a fan that exhausts air from inside the drying furnace to outside the drying furnace through the duct, and the movable section adjusts at least one of the volume and speed of the air flowing along the medium within the drying furnace by moving.

[0007] A printing device that solves the above problem comprises a printing unit that prints an image on a medium, a drying oven into which the printed medium enters, a heating unit that heats the medium inside the drying oven, an exhaust unit that exhausts air from the drying oven, and a movable unit that is configured to move, wherein the drying oven has an air intake port through which air flows into the drying oven from outside the drying oven, and the exhaust unit has a duct extending from the drying oven and a fan that exhausts air from inside the drying oven to outside the drying oven through the duct, and the movable unit adjusts at least one of the amount of air intake that flows in from the air intake port and the amount of air exhausted from the drying oven by moving.

[0008] A printing device that solves the above problem comprises a printing unit that prints an image on a medium, a drying oven into which the printed medium enters, a heating unit that heats the medium inside the drying oven, an exhaust unit that exhausts air from the drying oven, and a movable unit that is configured to move, wherein the drying oven has an air intake port through which air flows into the drying oven from outside the drying oven, and the exhaust unit has a duct extending from the drying oven and a fan that exhausts air from inside the drying oven to outside the drying oven through the duct, and the movable unit adjusts at least one of the volume and speed of the air flowing along the medium inside the drying oven by moving. [Brief explanation of the drawings]

[0009] [Figure 1] FIG. 1 is a diagram showing an embodiment of a printing system. [Figure 2] FIG. 2 is a cross-sectional view showing an embodiment of a drying device. [Figure 3] FIG. 3 is a perspective view of the drying device. [Figure 4] FIG. 4 is a cross-sectional view showing a modified example of the drying device. [Figure 5] FIG. 5 is a perspective view showing a modified example different from that shown in FIG. [Figure 6] FIG. 6 is a perspective view showing a modified example different from those shown in FIGS. [Figure 7] FIG. 7 is a perspective view showing a modified example different from those shown in FIGS. [Figure 8] FIG. 8 is a cross-sectional view of the drying device shown in FIG. [Figure 9] FIG. 9 is a perspective view showing a modified example different from those shown in FIGS. [Figure 10] FIG. 10 is a cross-sectional view showing a modified example different from those shown in FIGS. 4, 5, 6, 7 and 9. In FIG. [Figure 11] FIG. 11 is a cross-sectional view showing a modified example different from those shown in FIGS. 4, 5, 6, 7, 9 and 10. In FIG. [Figure 12] FIG. 12 is a cross-sectional view showing a modified example different from those shown in FIGS. 4, 5, 6, 7, 9, 10 and 11. In FIG. DETAILED DESCRIPTION OF THE INVENTION

[0010] Hereinafter, an embodiment of a printing system including a printing device and a drying device will be described with reference to the drawings. <Printing system> As shown in FIG. 1, the printing system 11 includes a printing device 12 and a drying device 13. The printing device 12 is configured to print an image on a medium 99. The printing device 12 is, for example, an inkjet printer that prints images such as text and photographs by ejecting ink, which is an example of a liquid, onto a medium 99 such as paper or fabric. The liquid is, for example, ink containing a solvent such as glycerin or water. The drying device 13 is configured to dry the printed medium 99. More specifically, the drying device 13 dries the medium 99 by heating it. The printing system 11 prints and dries a long medium 99 that extends from the printing device 12 to the drying device 13. The printing device 12 and the drying device 13 may be linked by transmitting signals to each other.

[0011] The printing device 12 and the drying device 13 are aligned in a transport direction D1. The transport direction D1 is the direction in which the medium 99 is transported from the printing device 12 to the drying device 13. In one example, the printing device 12 and the drying device 13 may be aligned with a gap between them in the transport direction D1. In this case, a user can stand between the printing device 12 and the drying device 13.

[0012] The printing system 11 includes an input unit 14. The input unit 14 is an interface for inputting information to the printing system 11. A user operates the printing system 11 by operating the input unit 14. The input unit 14 is, for example, a touch panel. The input unit 14 may include a button, a lever, a switch, etc. The input unit 14 may be attached to the printing device 12 or the drying device 13. The printing device 12 may be equipped with the input unit 14, or the drying device 13 may be equipped with the input unit 14. Each of the printing device 12 and the drying device 13 may be equipped with the input unit 14.

[0013] The printing system 11 may be installed in a factory 15. The factory 15 has an exhaust mechanism 16. The exhaust mechanism 16 is configured to exhaust air from inside the factory 15 to outside the factory 15. The exhaust mechanism 16 has, for example, an exhaust duct 17 and an exhaust fan 18. The exhaust duct 17 extends so as to communicate between the inside of the factory 15 and the outside of the factory 15. The exhaust fan 18 is attached to the exhaust duct 17. The exhaust fan 18 is configured to blow air from inside the factory 15 to outside the factory 15 so that the air is exhausted through the exhaust duct 17.

[0014] The printing system 11 is connected to an exhaust mechanism 16. In the printing system 11, steam is generated when printing on and drying the medium 99. In particular, steam is generated when the drying device 13 dries the medium 99. Therefore, the exhaust gas from the printing system 11 contains steam. If the exhaust gas from the printing system 11 stagnates in the factory 15, the steam may enter the printing system 11 or affect workers in the factory 15. Therefore, by connecting the exhaust mechanism 16 to the printing system 11, the exhaust gas from the printing system 11 is exhausted outside the factory 15. The exhaust mechanism 16 is not limited to being connected to the printing system 11, and may also be connected to other devices, systems, etc. The exhaust mechanism 16 may be a mechanism that collectively exhausts the exhaust gas from each device, system, etc. installed in the factory 15.

[0015] <Printing device> The printing device 12 may include a feeding unit 21. The feeding unit 21 is configured to feed the medium 99. The feeding unit 21 feeds the medium 99 from, for example, a roll. The roll is an article in which the medium 99 is wound up.

[0016] The feeding unit 21 may have a feeding case 22. The feeding case 22 houses the first roll R1. The first roll R1 is a roll in which the medium 99 before printing is wound up.

[0017] The feeding unit 21 has a feeding section 23. The feeding section 23 is configured to feed the medium 99 from the first roll R1. In one example, the feeding section 23 is housed in a feeding case 22.

[0018] The unwinding unit 23 has a unwinding spindle 24. The unwinding spindle 24 rotatably supports the first roll body R1. The unwinding spindle 24 may rotate actively, may rotate passively, or may be fixed to the unwinding case 22. As the first roll body R1 rotates, the medium 99 is unwound from the first roll body R1. In the unwinding unit 23, the first roll body R1 may rotate as the unwinding spindle 24 rotates, or may rotate as the medium 99 is pulled.

[0019] The printing device 12 includes a printing unit 25. The printing unit 25 is configured to print on a medium 99. The printing unit 25 prints on the medium 99 fed from the feeding unit 21. The printing unit 25 may also print on the medium 99 fed from another device.

[0020] The printing unit 25 has a housing 26. The housing 26 is positioned, for example, adjacent to the feeding case 22. In one example, the housing 26 is aligned with the feeding case 22 in the conveying direction D1. More specifically, the feeding case 22 and the housing 26 are aligned in this order in the conveying direction D1.

[0021] The printing unit 25 has a printing section 27. The printing section 27 is housed in the housing 26. The printing section 27 prints an image on the medium 99. The printing section 27 prints on the medium 99 by ejecting a liquid onto the medium 99. The printing section 27 prints on the medium 99 fed from the feeding section 23. The printing section 27 prints on the medium 99 transported within the housing 26.

[0022] The printing unit 27 has a head 28. The head 28 has a nozzle surface 30 in which one or more nozzles 29 are opened. The head 28 ejects liquid from the nozzles 29 onto a medium 99. The nozzle surface 30 faces the medium 99.

[0023] The printing unit 27 may have a carriage 31. The carriage 31 carries the head 28. The carriage 31 scans across the medium 99. That is, in one example, the head 28 is a serial head that prints across the width of the medium 99 by scanning across the medium 99. The head 28 may also be a line head that can eject liquid across the width of the medium 99 simultaneously.

[0024] The printing unit 25 has a transport unit 32. The transport unit 32 is configured to transport the medium 99. The transport unit 32 transports the medium 99 within the housing 26. In one example, the transport unit 32 transports the medium 99 in a transport direction D1. In one example, the transport unit 32 transports the medium 99 intermittently. This is because, in one example, the head 28 is a serial head. If the head 28 is a line head, the transport unit 32 may transport the medium 99 continuously.

[0025] The transport unit 32 is housed in the housing 26. The transport unit 32 transports the medium 99 fed out from the feeding unit 23. The transport unit 32 may cause the feeding unit 23 to feed out the medium 99 by pulling the medium 99 from the first roll body R1. The transport unit 32 faces the printing unit 27. In one example, the transport unit 32 is located directly below the printing unit 27.

[0026] The conveying section 32 has a first pulley 33, a second pulley 34, and a belt 35. The first pulley 33 and the second pulley 34 are aligned, for example, in the conveying direction D1. The belt 35 is wound around the first pulley 33 and the second pulley 34. The belt 35 rotates together with the first pulley 33 and the second pulley 34.

[0027] The belt 35 supports the medium 99. More specifically, the belt 35 is configured to hold the medium 99. In one example, the belt 35 holds the medium 99 with an adhesive. The adhesive is applied to the surface of the belt 35. The medium 99 is attached to the belt 35 with the adhesive. This stabilizes the position of the medium 99. The belt 35 may hold the medium 99 with static electricity, for example, or with negative pressure due to suction. The belt 35 rotates while holding the medium 99, thereby transporting the medium 99. The transport unit 32 is not limited to transporting the medium 99 with the belt 35, and may transport the medium 99 with rollers, for example.

[0028] The printing unit 25 may have one or more printing guide rollers. In one example, the printing unit 25 has a first printing guide roller 36 and a second printing guide roller 37. The printing guide rollers are configured to guide the medium 99. The printing guide rollers guide the medium 99 by contacting the medium 99. The printing guide rollers guide the medium 99 from the feeding unit 21 to the printing unit 25, or from the printing device 12 to the drying device 13.

[0029] The print guide rollers may be located inside or outside the housing 26. In one example, the first print guide roller 36 and the second print guide roller 37 are located outside the housing 26. The first print guide roller 36 guides the medium 99, for example, so that the medium 99 is supplied from outside the housing 26 into the housing 26. In one example, the first print guide roller 36 guides the medium 99 fed from the feeding section 23 into the housing 26. The second print guide roller 37 guides the medium 99, for example, so that the medium 99 is discharged from inside the housing 26 to the outside of the housing 26. In more detail, the second print guide roller 37 guides the printed medium 99 out of the housing 26.

[0030] The printing unit 25 has a printing control unit 38. The printing control unit 38 controls the printing unit 25. More specifically, the printing control unit 38 controls the printing unit 27 and the transport unit 32. The printing control unit 38 may control the feeding unit 21 in addition to the printing unit 25. The printing control unit 38 may also control the feeding unit 23, for example.

[0031] The print control unit 38 may be configured with one or more processors that execute various processes according to a computer program. The print control unit 38 may also be configured with one or more dedicated hardware circuits, such as an ASIC, that execute at least some of the various processes. The print control unit 38 may also be configured with a circuit that includes a combination of a processor and a hardware circuit. The processor includes a CPU and memory such as RAM and ROM. The memory stores program code or instructions configured to cause the CPU to execute processes. The memory, i.e., computer-readable medium, includes any readable medium that can be accessed by a general-purpose or special-purpose computer.

[0032] The print control unit 38 may communicate with the drying device 13. The print control unit 38 may send various signals to the drying device 13. The print control unit 38 may notify the drying device 13 of the status of the printing device 12 by sending a signal to the drying device 13. The print control unit 38 may receive various signals from the drying device 13. The print control unit 38 may know the status of the drying device 13 by receiving a signal from the drying device 13.

[0033] <Drying equipment> Drying device 13 may include a winding unit 41. Winding unit 41 is configured to wind up medium 99. Winding unit 41 winds up medium 99 to form a roll body.

[0034] The winding unit 41 may have a winding case 42. The winding case 42 houses the second roll body R2. The second roll body R2 is a roll body in which the dried medium 99 is wound up and stacked.

[0035] The winding unit 41 has a winding section 43. The winding section 43 is configured to wind the medium 99. The winding section 43 winds the dried medium 99. In one example, the winding section 43 is housed in a winding case 42.

[0036] The winding unit 43 has a winding shaft 44. The winding shaft 44 rotatably supports the second roll body R2. As the winding shaft 44 rotates, the medium 99 is wound onto the winding shaft 44. As the winding shaft 44 rotates, the second roll body R2 rotates. The medium 99 is wound onto the winding unit 43 and transported in the drying device 13.

[0037] The winding unit 43 is driven to wind the medium 99 at a speed faster than the transport unit 32. That is, the winding unit 43 is driven so that the winding speed is faster than the transport speed. This applies tension to the medium 99 between the transport unit 32 and the winding unit 43. Applying tension to the medium 99 stabilizes the position of the medium 99. For example, applying tension to the medium 99 makes it easier to peel the medium 99 from the belt 35.

[0038] The winding unit 43 may have a dancer roller 45. The dancer roller 45 may be located inside the winding case 42 or outside the winding case 42. The medium 99 is wound around the dancer roller 45. More specifically, the medium 99 before being wound around the winding spindle 44 is wound around the dancer roller 45. The dancer roller 45 is configured to be displaceable. By displacing, the dancer roller 45 adjusts the tension applied to the medium 99. This makes it easier for the winding spindle 44 to stably wind the medium 99. The unwinding unit 23 may also have a dancer roller 45.

[0039] The drying device 13 includes a drying unit 46. The drying unit 46 is configured to dry the medium 99. The drying unit 46 dries the medium 99 that has been printed by the printing device 12. After being dried by the drying unit 46, the medium 99 is taken up by the take-up unit 41.

[0040] The drying unit 46 has a drying oven 47. The drying oven 47 is located, for example, adjacent to the winding case 42. In one example, the drying oven 47 is aligned with the winding case 42 in the conveying direction D1. Specifically, the drying oven 47 and the winding case 42 are aligned in this order in the conveying direction D1. A medium 99 to be conveyed enters the drying oven 47. Specifically, the medium 99 conveyed from the printing device 12 enters the drying oven 47. The printed medium 99 enters the drying oven 47. In the drying oven 47, the medium 99 is conveyed by the conveying section 32 and the winding section 43.

[0041] The drying oven 47 has one or more passage openings. For example, the drying oven 47 has a first passage opening 48 and a second passage opening 49. The passage openings are openings through which the medium 99 passes. The medium 99 enters the drying oven 47 through the first passage opening 48. The medium 99 is discharged from the drying oven 47 through the second passage opening 49. The first passage opening 48 opens on a surface of the drying oven 47 facing the printing device 12. The second passage opening 49 opens on a surface of the drying oven 47 opposite the surface facing the printing device 12. For example, the second passage opening 49 opens on a surface of the drying oven 47 adjacent to the winding unit 41.

[0042] The drying oven 47 has one or more air intake ports. For example, the drying oven 47 has a first air intake port 50 and a second air intake port 51. The air intake port is an opening through which air flows into the drying oven 47 from outside the drying oven 47. The drying oven 47 takes in air through the air intake port. The air intake port may be a common opening with the passage port, or may be a different opening independent of the passage port. For example, the first air intake port 50 is a common opening with the first passage port 48. The second air intake port 51 is a common opening with the second passage port 49.

[0043] One or more exhaust ports 52 are opened in the drying oven 47. In one example, the drying oven 47 has one exhaust port 52. The exhaust port 52 is an opening through which air flows out from inside the drying oven 47 to outside the drying oven 47. The drying oven 47 exhausts air through the exhaust port 52. The exhaust port 52 is an opening different from the passage port and the intake port. The exhaust port 52 opens, for example, on the top surface of the drying oven 47.

[0044] The drying unit 46 has a heating section 53. The heating section 53 is housed in the drying oven 47. The heating section 53 is configured to heat the medium 99. The heating section 53 heats the medium 99 inside the drying oven 47. The heating section 53 is positioned to face the medium 99. When the heating section 53 heats the medium 99, the liquid adhering to the medium 99 evaporates. This dries the medium 99. As a result, the image is fixed to the medium 99.

[0045] The heating unit 53 has one or more heating elements 54. In one example, the heating unit 53 has four heating elements 54. The heating elements 54 are positioned to face the medium 99. The heating elements 54 are positioned to face the printed surface of the medium 99. In one example, the heating elements 54 are positioned to face the top surface of the medium 99. The four heating elements 54 are aligned in the conveying direction D1. The four heating elements 54 are aligned along the medium 99 extending through the drying furnace 47. The heating elements 54 are not limited to infrared heaters and may be, for example, a blower that blows hot air onto the medium 99.

[0046] The heating member 54 is configured to heat the medium 99. The heating member 54 is, for example, an infrared heater. The heating member 54 heats the medium 99 by irradiating the medium 99 with infrared rays. The heating member 54 irradiates the printed surface of the medium 99 with infrared rays.

[0047] The heating member 54 is configured to heat the medium 99 across its width. In one example, the heating member 54 extends in a width direction D2. The width direction D2 is a direction different from the conveying direction D1. The width direction D2 is a direction different from the vertical direction. The width direction D2 is a direction that indicates the width of the medium 99. By extending in the width direction D2, the heating member 54 irradiates infrared rays across the width of the medium 99. The heating member 54 is configured, for example, to be larger than the overall width of the medium 99 in the width direction D2. More specifically, the heating member 54 is configured to be longer than the maximum width of the medium 99 that the drying device 13 can accommodate.

[0048] The heating unit 53 may have one or more reflectors 55. In one example, the heating unit 53 has the same number of reflectors 55 as the heating members 54. The heating unit 53 has four reflectors 55. The reflectors 55 are positioned so as to reflect infrared rays generated from the heating members 54 toward the medium 99. The reflectors 55 are positioned, for example, directly above the heating members 54.

[0049] The drying unit 46 has an exhaust section 56. The exhaust section 56 is connected to the drying oven 47. The exhaust section 56 is configured to exhaust air from the drying oven 47. More specifically, the exhaust section 56 exhausts air from the drying oven 47 through the exhaust port 52.

[0050] The exhaust section 56 has a duct 57. The duct 57 extends from the drying oven 47. The duct 57 is attached to the drying oven 47. The duct 57 is connected to the drying oven 47 via the exhaust port 52 so as to communicate with the inside of the drying oven 47. The duct 57 communicates with the inside and outside of the drying oven 47.

[0051] The duct 57 may be connected to the exhaust mechanism 16. In one example, the duct 57 is connected to the exhaust duct 17. The exhaust section 56 exhausts air from the drying oven 47 toward the exhaust mechanism 16. The exhaust section 56 exhausts air from inside the drying oven 47 to the outside of the factory 15 through the exhaust mechanism 16. The duct 57 may extend outside the factory 15.

[0052] The exhaust section 56 has a fan 58. The fan 58 is configured to exhaust air from inside the drying oven 47 to outside the drying oven 47 through a duct 57. The fan 58 blows air from inside the drying oven 47 to outside the drying oven 47. The fan 58 is attached to the duct 57. The fan 58 is located inside the duct 57. In one example, the fan 58 exhausts air from the drying oven 47 to the exhaust mechanism 16. The fan 58 is driven to rotate at a predetermined speed, for example. After being sent to the fan 58, the air is exhausted outside the factory 15 through the exhaust mechanism 16.

[0053] The drying unit 46 may have one or more drying guide rollers. In one example, the drying unit 46 has a first drying guide roller 59 and a second drying guide roller 60. The drying guide rollers are configured to guide the medium 99, similar to the printing guide rollers. The drying guide rollers guide the medium 99 by contacting the medium 99. The drying guide rollers guide the medium 99 from the printing device 12 to the drying device 13, or from the drying unit 46 to the winding unit 41.

[0054] The drying guide rollers may be located inside or outside the drying oven 47. In one example, the first drying guide roller 59 and the second drying guide roller 60 are located outside the drying oven 47. The first drying guide roller 59 guides the medium 99 so that the medium 99 is supplied from outside the drying oven 47 into the drying oven 47. In one example, the first drying guide roller 59 guides the medium 99 transported from the printing device 12 into the drying oven 47. The first drying guide roller 59 guides the medium 99 so that the medium 99 enters the drying oven 47 through the first passage opening 48. The second drying guide roller 60 guides the medium 99 so that the medium 99 is discharged from inside the drying oven 47 to the outside of the drying oven 47, for example. More specifically, the second drying guide roller 60 guides the dried medium 99 out of the drying oven 47. The second drying guide roller 60 guides the medium 99 so that the medium 99 is discharged from the drying oven 47 through the second passage opening 49.

[0055] The drying unit 46 may have a detection unit 61. The detection unit 61 is configured to detect the state of the drying device 13. Specifically, the detection unit 61 is configured to detect the state inside the drying oven 47. The detection unit 61 is located, for example, inside the drying oven 47. The detection unit 61 may be located inside the duct 57. The detection unit 61 includes, for example, a sensor. The detection unit 61 may detect the air speed inside the drying oven 47 or the air volume inside the drying oven 47. The detection unit 61 may detect the temperature inside the drying oven 47 or the humidity inside the drying oven 47. The detection unit 61 may detect the vapor components inside the drying oven 47. Specifically, the detection unit 61 may detect the components of the solvent evaporating from the liquid. For example, if the liquid contains glycerin and water as solvents, the detection unit 61 may detect glycerin and water.

[0056] The drying unit 46 has a control unit 62. The control unit 62 controls the drying unit 46. Specifically, the control unit 62 controls the heating unit 53 and the exhaust unit 56. The control unit 62 may control the winding unit 41 in addition to the drying unit 46. The control unit 62 may also control the winding unit 43, for example. Like the print control unit 38, the control unit 62 may be configured with a processor, may be configured with a hardware circuit, or may be configured with a circuit including a combination thereof.

[0057] The control unit 62 may be connected to the detection unit 61. The control unit 62 may determine whether the medium 99 is properly dried based on the detection result of the detection unit 61. For example, the control unit 62 may determine that the medium 99 is properly dried when the air speed in the drying oven 47 is within a predetermined range. The control unit 62 may determine that the medium 99 is properly dried when the air volume in the drying oven 47 is within a predetermined range. The control unit 62 may determine that the medium 99 is properly dried when the temperature in the drying oven 47 is within a predetermined range. The control unit 62 may determine that the medium 99 is properly dried when the humidity in the drying oven 47 is within a predetermined range. The control unit 62 may determine that the medium 99 is properly dried when the steam component in the drying oven 47 is a predetermined ratio.

[0058] The control unit 62 may communicate with the printing device 12. More specifically, the control unit 62 communicates with the print control unit 38. The control unit 62 transmits various signals to the print control unit 38. The control unit 62 notifies the print control unit 38 of the status of the drying device 13 by transmitting signals to the print control unit 38. The control unit 62 receives various signals from the print control unit 38. The control unit 62 can grasp the status of the printing device 12 by receiving signals from the print control unit 38. The control unit 62 may receive printing information from the print control unit 38, for example. The printing information includes the printing speed of the printing unit 27 and the transport speed of the transport unit 32. The printing information may include information indicating the type of liquid used for printing, information indicating the type of medium 99, etc.

[0059] In the drying device 13, the medium 99 is heated by the heating section 53, causing steam to accumulate in the drying furnace 47. The exhaust section 56 exhausts air together with steam from the drying furnace 47, and the drying furnace 47 takes in air through its intake port, thereby allowing the medium 99 to be properly dried. For example, the exhaust section 56 exhausts air from the drying furnace 47 and the drying furnace 47 takes in air through its intake port, thereby maintaining an environment inside the drying furnace 47 suitable for drying the medium 99. The exhaust section 56 exhausts air from the drying furnace 47 and the drying furnace 47 takes in air through its intake port, thereby maintaining an environment inside the drying furnace 47 suitable for drying the medium 99.

[0060] If the amount of exhaust air from the drying furnace 47 is too much or too little, the media 99 may not be dried properly. For example, if the amount of exhaust air is too much, the temperature inside the drying furnace 47 is likely to drop. In this case, the media 99 may not be dried properly. If the amount of exhaust air is insufficient, the temperature inside the drying furnace 47 is likely to rise. In this case, the media 99 may be overheated. Furthermore, if the amount of exhaust air is insufficient, steam may leak from the drying furnace 47 into the factory 15.

[0061] The amount of exhaust air from the drying furnace 47 is affected by the drive rate of the fan 58. When the drive rate of the fan 58 increases, the amount of exhaust air tends to increase. When the drive rate of the fan 58 decreases, the amount of exhaust air tends to decrease.

[0062] The exhaust volume from the drying furnace 47 may be affected by the environment in which the drying apparatus 13 is installed. For example, when the exhaust section 56 is connected to the exhaust mechanism 16, the exhaust volume may be affected by the exhaust mechanism 16. If the exhaust performance of the exhaust mechanism 16 is low, the exhaust volume may be insufficient. This is because the exhaust mechanism 16 becomes a bottleneck. If the exhaust performance of the exhaust mechanism 16 is high, the exhaust volume may be excessive. Therefore, when the exhaust section 56 is connected to the exhaust mechanism 16, it may be difficult to adjust the exhaust volume by changing the drive rate of the fan 58. Furthermore, when the exhaust section 56 directly exhausts air outside the factory 15, the exhaust volume may be affected by the environment outside the factory 15. For example, depending on the weather, the exhaust volume may be excessive or insufficient. Therefore, even when the exhaust section 56 directly exhausts air outside the factory 15, it may be difficult to adjust the exhaust volume by changing the drive rate of the fan 58.

[0063] The amount of exhaust air from the drying oven 47 is affected by the ease of intake through the intake port. More specifically, the ease of intake of air flowing into the drying oven 47 through the intake port affects the amount of exhaust air. If it is easy to intake air through the intake port, the amount of intake air tends to be large. If the amount of intake air is large, the amount of exhaust air tends to be large. If it is difficult to intake air through the intake port, the amount of intake air tends to be small. If the amount of intake air is small, the amount of exhaust air tends to be small.

[0064] The amount of exhaust from the drying furnace 47 is affected by the ease of exhaust from the exhaust port 52. More specifically, the ease of exhausting air from the drying furnace 47 through the exhaust port 52 affects the amount of exhaust. The easier it is to exhaust air from the exhaust port 52, the larger the amount of exhaust tends to be. The more difficult it is to exhaust air from the exhaust port 52, the smaller the amount of exhaust tends to be.

[0065] The drying device 13 adjusts the environment inside the drying furnace 47 by adjusting the ease of intake, the ease of exhaust, or both. That is, the drying device 13 adjusts the environment inside the drying furnace 47 by adjusting at least one of the intake air volume and the exhaust air volume. It can also be said that the drying device 13 adjusts the ease of air flow in the drying device 13 by adjusting the intake air volume or the exhaust air volume. The drying device 13 appropriately dries the medium 99 by adjusting the intake air volume or the exhaust air volume.

[0066] As shown in Figures 2 and 3, the drying unit 46 has a movable part 63. The movable part 63 is configured to move. The movable part 63 is configured to move in the drying unit 46. The movable part 63 adjusts at least one of the intake volume of air flowing in from the intake port and the exhaust volume of air exhausted from the drying oven 47 by moving. The movable part 63 may adjust the intake volume by moving. The movable part 63 may adjust the exhaust volume by moving. The movable part 63 may adjust both the intake volume and the exhaust volume by moving. It can also be said that the movable part 63 adjusts the ease of air flow in the drying oven 47 by moving. The drying unit 46 properly dries the medium 99 by the movable part 63 adjusting at least one of the intake volume and the exhaust volume.

[0067] The movable part 63 may be configured to change the flow resistance of the air flowing in from the intake port. The movable part 63 may change the flow resistance of the air flowing in from the intake port by moving. When the flow resistance increases, it becomes difficult to draw air through the intake port. In this case, the amount of intake air decreases. When the flow resistance decreases, it becomes easier to draw air through the intake port. In this case, the amount of intake air increases. In this way, the movable part 63 may adjust the amount of intake air.

[0068] The movable part 63 may be configured to change the flow resistance of the air discharged from the drying furnace 47. The movable part 63 may change the flow resistance of the air discharged from the drying furnace 47 by moving. When the flow resistance increases, it becomes more difficult to discharge air from the exhaust port 52. In this case, the amount of exhaust decreases. When the flow resistance decreases, it becomes easier to discharge air from the exhaust port 52. In this case, the amount of exhaust increases. In this way, the movable part 63 may adjust the amount of exhaust.

[0069] The movable part 63 moves so that the medium 99 is properly dried in the drying furnace 47. The movable part 63 moves, for example, so that the environment inside the drying furnace 47 is appropriate for drying the medium 99. When the exhaust volume from the drying furnace 47 is insufficient, the movable part 63 moves to increase the intake volume or the exhaust volume. When the exhaust volume is insufficient, the temperature inside the drying furnace 47 is likely to rise. In response to this, the movable part 63 moves to increase the intake volume or the exhaust volume, making it difficult for the temperature inside the drying furnace 47 to rise. When the exhaust volume is excessive, the movable part 63 moves to decrease the intake volume or the exhaust volume. When the exhaust volume is excessive, the temperature inside the drying furnace 47 is likely to drop. In response to this, the movable part 63 moves to decrease the intake volume or the exhaust volume, making it difficult for the temperature inside the drying furnace 47 to drop.

[0070] The movable part 63 may be controlled by the control part 62. The movable part 63 may be controlled by the control part 62 so as to move automatically. The movable part 63 may be controlled by the control part 62 so as to, for example, properly dry the medium 99. The movable part 63 may also be configured to be moved manually by a user. The movable part 63 may be moved manually so as to, for example, properly dry the medium 99.

[0071] The movable part 63 may be controlled by the control part 62 based on the detection result of the detection part 61. That is, the movable part 63 may be automatically moved by the control part 62 based on the detection result of the detection part 61. The movable part 63 may also be manually moved by the user based on the detection result of the detection part 61.

[0072] The movable part 63 may move to reduce the amount of intake air or the amount of exhaust air when the wind speed inside the drying furnace 47 is high. When the wind speed inside the drying furnace 47 is high, the temperature inside the drying furnace 47 is likely to drop. In particular, when the wind speed of the air flowing along the medium 99 is high, the temperature of the medium 99 is likely to drop. As a result, the drying of the medium 99 is likely to be insufficient. In response to this, by moving the movable part 63 to reduce the amount of intake air or the amount of exhaust air, the temperature inside the drying furnace 47 is less likely to drop.

[0073] The movable part 63 may move to increase the amount of intake air or the amount of exhaust air when the air velocity inside the drying furnace 47 is low. When the air velocity inside the drying furnace 47 is low, the temperature inside the drying furnace 47 is likely to rise. In particular, when the air velocity flowing along the medium 99 is low, the temperature of the medium 99 is likely to rise. As a result, the medium 99 is likely to be overheated. In response to this, by moving the movable part 63 to increase the amount of intake air or the amount of exhaust air, the temperature inside the drying furnace 47 is less likely to rise.

[0074] The movable part 63 may move to reduce the amount of intake air or the amount of exhaust air when the air volume inside the drying furnace 47 is large. When the air volume inside the drying furnace 47 is large, the temperature inside the drying furnace 47 is likely to drop. In particular, when the volume of air flowing along the medium 99 is large, the temperature of the medium 99 is likely to drop. As a result, the drying of the medium 99 is likely to be insufficient. In response to this, by moving the movable part 63 to reduce the amount of intake air or the amount of exhaust air, the temperature inside the drying furnace 47 is less likely to drop.

[0075] The movable part 63 may move to increase the intake air volume or the exhaust air volume when the air volume inside the drying furnace 47 is small. When the air volume inside the drying furnace 47 is small, the temperature inside the drying furnace 47 is likely to rise. In particular, when the air volume flowing along the medium 99 is small, the temperature of the medium 99 is likely to rise. As a result, the medium 99 is likely to be overheated. In response to this, by moving the movable part 63 to increase the intake air volume or the exhaust air volume, the temperature inside the drying furnace 47 is less likely to rise.

[0076] The movable part 63 may move to increase the amount of intake air or the amount of exhaust air when the temperature inside the drying oven 47 is high. This makes it difficult for the temperature inside the drying oven 47 to rise. The movable part 63 may move to decrease the amount of intake air or the amount of exhaust air when the temperature inside the drying oven 47 is low. This makes it difficult for the temperature inside the drying oven 47 to drop.

[0077] The movable part 63 may move to increase the amount of intake air or the amount of exhaust air when the humidity inside the drying furnace 47 is high. When the humidity inside the drying furnace 47 is high, steam may stagnate due to an insufficient amount of exhaust air. This may result in excessive heating of the medium 99 or delay in drying of the medium 99. In response to this, moving the movable part 63 to increase the amount of intake air or the amount of exhaust air makes it easier for the humidity inside the drying furnace 47 to decrease.

[0078] The movable part 63 may move to reduce the amount of intake air or the amount of exhaust air when the humidity inside the drying furnace 47 is low. When the humidity inside the drying furnace 47 is low, the amount of exhaust air may be excessive, causing the temperature inside the drying furnace 47 to drop. This may result in insufficient drying of the medium 99. In response to this, by moving the movable part 63 to reduce the amount of intake air or the amount of exhaust air, the temperature inside the drying furnace 47 is less likely to drop.

[0079] The movable part 63 may move to increase the amount of intake air or the amount of exhaust air when the pressure inside the drying furnace 47 is high. When the pressure inside the drying furnace 47 is high, steam may stagnate due to an insufficient exhaust volume. This may result in excessive heating of the medium 99 or delay in drying of the medium 99. In response to this, moving the movable part 63 to increase the amount of intake air or the amount of exhaust air makes it easier to exhaust steam from the drying furnace 47.

[0080] The movable part 63 may move to reduce the amount of intake air or the amount of exhaust air when the pressure inside the drying furnace 47 is low. When the pressure inside the drying furnace 47 is low, the amount of exhaust air may be excessive, causing the temperature inside the drying furnace 47 to drop. This may result in insufficient drying of the medium 99. In response to this, by moving the movable part 63 to reduce the amount of intake air or the amount of exhaust air, the temperature inside the drying furnace 47 is less likely to drop.

[0081] The movable part 63 may move to change the amount of intake air or the amount of exhaust air based on the steam components in the drying oven 47. For example, when the amount of water vapor in the drying oven 47 is large, the movable part 63 may move to reduce the amount of intake air or the amount of exhaust air. In a liquid containing water and glycerin, water evaporates more easily than glycerin due to the difference in boiling points. Therefore, when the amount of water vapor is large, the evaporation of glycerin may be hindered. In this case, the temperature in the drying oven 47 may drop excessively. In response to this, by moving the movable part 63 to reduce the amount of intake air or the amount of exhaust air, the temperature in the drying oven 47 is less likely to drop.

[0082] The movable part 63 may be controlled by the control part 62 based on the printed information. That is, the movable part 63 may be automatically moved by the control part 62 based on the printed information. The movable part 63 may also be manually moved by the user based on the printed information.

[0083] The movable part 63 may move to reduce the amount of intake air or exhaust air when the printing speed, transport speed, etc. are high. When the printing speed, transport speed, etc. are high, the heating time of the medium 99 is likely to be short. As a result, the drying of the medium 99 is likely to be insufficient. In response to this, by moving the movable part 63 to reduce the amount of intake air or exhaust air, the temperature inside the drying furnace 47 is more likely to rise. This promotes the drying of the medium 99.

[0084] The movable part 63 may have one or more covers 64. In one example, the movable part 63 has one cover 64. The cover 64 is attached to the drying oven 47. The cover 64 changes the flow area of ​​the air intake port by moving. The flow area of ​​the air intake port is the effective area of ​​the air intake port through which air can pass. When the flow area of ​​the air intake port becomes smaller, the flow resistance to the air flowing in from the air intake port becomes larger. This tends to reduce the amount of air intake. When the flow area of ​​the air intake port becomes larger, the flow resistance to the air flowing in from the air intake port becomes smaller. This tends to increase the amount of air intake.

[0085] The cover 64 is attached so as to overlap the first air intake port 50. The cover 64 moves so as to change the opening area of ​​the first air intake port 50. The cover 64 may be attached so as to overlap the second air intake port 51. The cover 64 may move so as to change the opening area of ​​the second air intake port 51. The movable part 63 may have a cover 64 that changes the opening area of ​​the first air intake port 50, and a cover 64 that changes the opening area of ​​the second air intake port 51. In this case, the two covers 64 may be configured to move integrally, or may be configured to move independently.

[0086] The cover 64 is configured to slide vertically, thereby changing the flow area of ​​the intake port. In one example, the cover 64 moves downward, thereby reducing the flow area of ​​the first intake port 50. This reduces the amount of intake air. The cover 64 moves upward, thereby increasing the flow area of ​​the first intake port 50.

[0087] When the exhaust volume is insufficient, the cover 64 moves to increase the flow area of ​​the intake port, making it difficult for the temperature inside the drying oven 47 to rise. When the exhaust volume is excessive, the cover 64 moves to decrease the flow area of ​​the intake port, making it difficult for the temperature inside the drying oven 47 to drop.

[0088] <Actions and Effects of the Example> Next, the operation and effects of the above embodiment will be described. (1) The movable part 63 moves to adjust at least one of the intake volume of air flowing in through the intake port and the exhaust volume of air exhausted from the drying furnace 47. Changes in the intake volume or exhaust volume cause the temperature inside the drying furnace 47 to rise or fall. For example, an increase in the intake volume tends to decrease the temperature inside the drying furnace 47. A decrease in the intake volume tends to increase the temperature inside the drying furnace 47. An increase in the exhaust volume tends to decrease the temperature inside the drying furnace 47. A decrease in the exhaust volume tends to increase the temperature inside the drying furnace 47. According to the above configuration, when the exhaust volume is insufficient, the movable part 63 moves to increase the intake volume or the exhaust volume, thereby preventing the temperature inside the drying furnace 47 from rising. When the exhaust volume is excessive, the movable part 63 moves to decrease the intake volume or the exhaust volume, thereby preventing the temperature inside the drying furnace 47 from falling. This allows the drying device 13 to properly dry the medium 99.

[0089] (2) The movable part 63 changes the flow path resistance for the air flowing in from the intake port by moving. When the flow path resistance increases as the movable part 63 moves, the amount of intake air is likely to decrease. When the flow path resistance decreases as the movable part 63 moves, the amount of intake air is likely to increase. According to the above configuration, when the exhaust volume is insufficient, the movable part 63 moves to reduce the flow path resistance, making it difficult for the temperature inside the drying furnace 47 to rise. When the exhaust volume is excessive, the movable part 63 moves to increase the flow path resistance, making it difficult for the temperature inside the drying furnace 47 to decrease.

[0090] (3) The cover 64 changes the flow area of ​​the intake port by moving. When the flow area of ​​the intake port becomes smaller, it becomes more difficult for air to flow into the drying furnace 47. In other words, the flow resistance increases, which tends to reduce the amount of intake air. When the flow area of ​​the intake port becomes larger, it becomes more easy for air to flow into the drying furnace 47. In other words, the flow resistance decreases, which tends to increase the amount of intake air. According to the above configuration, when the exhaust volume is insufficient, the cover 64 moves to increase the flow area of ​​the intake port, which makes it difficult for the temperature inside the drying furnace 47 to rise. When the exhaust volume is excessive, the cover 64 moves to reduce the flow area of ​​the intake port, which makes it difficult for the temperature inside the drying furnace 47 to drop.

[0091] (4) The cover 64 changes the flow area of ​​the intake port by sliding vertically. With the above configuration, the flow area of ​​the intake port can be easily changed, thereby adjusting the amount of intake air.

[0092] (5) The control unit 62 controls the movable unit 63 based on the detection result of the detection unit 61. According to the above configuration, the movable unit 63 operates appropriately based on the state of the drying device 13. (6) The control unit 62 controls the movable unit 63 based on the print information. According to the above configuration, the movable unit 63 operates appropriately based on the print information.

[0093] <Example of change> The above embodiment can be modified as follows: The above embodiment and the following modifications can be combined with each other within the scope of technical compatibility.

[0094] As shown in FIG. 4 , the movable part 63 may have a rectifying plate 65. The rectifying plate 65 is located inside the drying furnace 47. The rectifying plate 65 is located so as to face the medium 99. The rectifying plate 65 extends, for example, along the heating part 53. In one example, the rectifying plate 65 extends above the heating part 53. Therefore, the heating part 53 is located between the medium 99 and the rectifying plate 65.

[0095] The straightening vane 65 guides the air flowing in from the air intake port so that it flows along the medium 99. In one example, the straightening vane 65 guides the air flowing in from the second air intake port 51 so that it flows along the medium 99. The straightening vane 65 may also guide the air flowing in from the first air intake port 50 so that it flows along the medium 99.

[0096] The straightening plate 65 may define a guide channel 66 within the drying furnace 47. The guide channel 66 is a channel through which air flowing in from the air intake port flows. The guide channel 66 extends from the air intake port. In one example, the guide channel 66 extends from the second air intake port 51. The heating unit 53 is located in the guide channel 66. The guide channel 66 is a channel that guides the air flowing in from the air intake port along the medium 99. The air passes between the medium 99 and the heating unit 53 by flowing through the guide channel 66.

[0097] The straightening vane 65 has a fixed portion 67. The fixed portion 67 is a portion that is fixed to the drying furnace 47. The fixed portion 67 is a portion that extends from the air intake port. In one example, the fixed portion 67 extends linearly from the second air intake port 51. The fixed portion 67 extends parallel to the medium 99.

[0098] The straightening vane 65 has a movable part 68. The movable part 68 is a part that moves relative to the fixed part 67. The movable part 68 is attached so as to move relative to the fixed part 67. In one example, the movable part 68 is attached to the fixed part 67 so as to rotate about an end of the fixed part 67 as an axis. The movable part 68 moves so as to extend the guide channel 66. The movable part 68 moves, for example, between a position where it extends the fixed part 67 and a position where it is bent relative to the fixed part 67. In FIG. 4 , the position indicated by the two-dot chain line is the position where it extends the fixed part 67. When the movable part 68 is positioned so as to extend the fixed part 67, the guide channel 66 is extended.

[0099] The straightening vane 65 adjusts at least one of the volume and speed of the air flowing along the medium 99 in the drying furnace 47 by moving. In this modified example, the straightening vane 65 changes the length of the guide channel 66 by moving. The straightening vane 65 changes the flow speed of the air flowing along the medium 99 by changing the length of the guide channel 66. When the movable part 68 is positioned to extend the fixed part 67, the guide channel 66 becomes longer. As the guide channel 66 becomes longer, the air flowing in from the air intake port is more likely to come into contact with the medium 99. This is because the air flowing in from the air intake port is less likely to diffuse in the drying furnace 47. As a result, the amount of air that comes into contact with the medium 99 increases. In addition, the flow speed of the air flowing along the medium 99 increases. This makes it easier for the temperature of the medium 99 to decrease. When the movable part 68 is displaced to a position where it is bent relative to the fixed part 67, the guide channel 66 becomes shorter. As the guide channel 66 becomes shorter, the air flowing in from the air intake port is less likely to come into contact with the medium 99. This reduces the amount of air that comes into contact with the medium 99. Also, the flow rate of the air flowing along the medium 99 decreases. This makes it easier for the temperature of the medium 99 to rise.

[0100] The straightening vane 65 changes the flow resistance of the air being discharged from the drying furnace 47 by moving. In this modified example, the straightening vane 65 changes the length of the guide flow path 66, thereby changing the flow resistance of the air being discharged from the drying furnace 47. When the guide flow path 66 is longer, it becomes more difficult for the air to diffuse inside the drying furnace 47, and the flow resistance of the air being discharged increases. As a result, the volume and speed of the air flowing along the medium 99 tend to increase. In this case, the temperature of the medium 99 tends to increase less. When the guide flow path 66 is shorter, it becomes more difficult for the air to diffuse inside the drying furnace 47, and the flow resistance of the air being discharged decreases. As a result, the volume and speed of the air flowing along the medium 99 tend to decrease. In this case, the temperature of the medium 99 tends to decrease less.

[0101] When the exhaust volume is insufficient, the volume and speed of the air flowing along the medium 99 tend to decrease, and the temperature of the medium 99 tends to rise. In response to this, the rectifying vane 65 lengthens the guide flow path 66 by moving. This prevents the volume and speed of the air flowing along the medium 99 from decreasing even when the exhaust volume is insufficient, making it difficult for the temperature of the medium 99 to rise. In other words, the risk of the medium 99 being overheated is reduced. When the exhaust volume is excessive, the volume and speed of the air flowing along the medium 99 tend to increase, and the temperature of the medium 99 tends to drop. In response to this, the rectifying vane 65 shortens the guide flow path 66 by moving. This prevents the volume and speed of the air flowing along the medium 99 from increasing even when the exhaust volume is excessive, making it difficult for the temperature of the medium 99 to drop. In other words, the risk of the medium 99 being insufficiently dried is reduced.

[0102] As described in this modified example, the movable part 63 may, by moving, adjust at least one of the volume and speed of the air flowing along the medium 99 in the drying furnace 47. The rectifying vane 65 is not limited to defining the guide flow path 66, and may be configured to guide the air so that it flows along the medium 99. The rectifying vane 65 may be configured to change at least one of the volume and speed of the air flowing along the medium 99 by moving. With this configuration, the medium 99 can be properly dried without changing the intake and exhaust volumes using the cover 64.

[0103] As shown in FIG. 5, the intake port may be an opening different from the passage port. The intake port opens independently from the passage port. Specifically, the first intake port 50 is an opening different from the first passage port 48. The second intake port 51 may be an opening different from the second passage port 49. In this modification, the first intake port 50 is composed of multiple holes that open above the first passage port 48. By the intake port being an opening different from the passage port, the passage port can be opened in a shape that matches the medium 99. For example, the passage port can be opened in a slit shape.

[0104] As shown in FIG. 5 , the cover 64 may be configured to overlap an intake port that opens independently of the passage port. In this modified example, the cover 64 is positioned to overlap a first intake port 50 that opens independently of the first passage port 48. The cover 64 changes the flow path area of ​​the first intake port 50, for example, by sliding vertically. In this case, the risk of the cover 64 coming into contact with the medium 99 is reduced. The cover 64 may be positioned to change the flow path area of ​​the second intake port 51 that opens independently of the second passage port 49. The movable portion 63 may have a cover 64 that changes the flow path area of ​​the first intake port 50 and a cover 64 that changes the flow path area of ​​the second intake port 51.

[0105] As shown in FIG. 6 , the cover 64 may be attached to the drying oven 47 so as to open and close. The cover 64 changes the flow area of ​​the air intake port by opening and closing. The cover 64 opens and closes, for example, by rotating around its upper end as an axis. In this modified example, the cover 64 is attached to the drying oven 47 so as to overlap with the first air intake port 50. The cover 64 changes the flow area of ​​the first air intake port 50 by opening and closing. The cover 64 may also change the flow area of ​​the second air intake port 51 by opening and closing. The movable part 63 may have a cover 64 that changes the flow area of ​​the first air intake port 50 by opening and closing, and a cover 64 that changes the flow area of ​​the second air intake port 51 by opening and closing.

[0106] 7 and 8, the movable part 63 may have one or more tubular members 69. The tubular members 69 are members that fit into the air intake ports. The tubular members 69 are attached to the drying furnace 47 by fitting into the air intake ports. In this modified example, the tubular members 69 are attached so as to fit into the first air intake port 50. The tubular members 69 may also be attached so as to fit into the second air intake port 51. The movable part 63 may have a tubular member 69 that is attached to the first air intake port 50 and a tubular member 69 that is attached to the second air intake port 51.

[0107] An inlet 70 opens in the tubular member 69. The inlet 70 is an opening through which air flows from outside the drying furnace 47 into the drying furnace 47. The air flows into the drying furnace 47 through the inlet 70. In this modified example, the first air intake port 50 is a common opening with the first passage port 48, and therefore the medium 99 passes through the inlet 70.

[0108] The tubular member 69 is configured to move at the air intake port. The tubular member 69 is configured to move at the air intake port in the conveying direction D1 and the opposite direction. As the tubular member 69 moves, the volume of the tubular member 69 that fits in the air intake port changes.

[0109] The tubular member 69 moves to change the amount of protrusion from the drying furnace 47. By changing the amount of protrusion from the drying furnace 47, the tubular member 69 changes the flow resistance of the air drawn in through the air intake port. When the amount of protrusion of the tubular member 69 from the drying furnace 47 is small, air flows into the drying furnace 47 through the inlet 70. At this time, the air flows into the drying furnace 47 while being guided by the inner surface of the tubular member 69 that forms the inlet 70. When the amount of protrusion of the tubular member 69 from the drying furnace 47 is large, the air flows into the drying furnace 47 through the inlet 70 and the air intake port. At this time, the air flows into the drying furnace 47 while being guided by the inner surface of the tubular member 69 that forms the inlet 70 and the inner surface of the drying furnace 47 that forms the air intake port. In other words, when the amount of protrusion of the tubular member 69 from the drying furnace 47 is large, the flow path length that the air travels from outside the drying furnace 47 to enter the drying furnace 47 increases. Therefore, if the amount by which the tubular member 69 protrudes from the drying furnace 47 is large, the flow resistance to the air flowing into the drying furnace 47 increases. Therefore, when the tubular member 69 protrudes from the drying furnace 47, the amount of intake air tends to decrease. If the amount by which the tubular member 69 protrudes from the drying furnace 47 is small, the flow resistance decreases, and the amount of intake air tends to increase. In this way, the amount of intake air is adjusted by the amount by which the tubular member 69 protrudes.

[0110] When the exhaust volume is insufficient, the cylindrical member 69 moves to reduce the amount of protrusion relative to the drying furnace 47. This makes it difficult for the temperature inside the drying furnace 47 to rise. When the exhaust volume is excessive, the cylindrical member 69 moves to increase the amount of protrusion relative to the drying furnace 47. This makes it difficult for the temperature inside the drying furnace 47 to drop.

[0111] As shown in FIG. 9 , the cover 64 may be configured to slide in the width direction D2. The cover 64 is positioned so as to overlap the air intake port. The cover 64 changes the flow area of ​​the air intake port by sliding. The movable unit 63 may have multiple covers 64. In this modified example, the movable unit 63 has two covers 64 that overlap the first air intake port 50. The two covers 64 may be configured to move in conjunction with each other. For example, the two covers 64 may move toward or away from each other in the width direction D2. By moving the two covers 64 toward each other, the flow area of ​​the air intake port decreases. The two covers 64 can narrow the width of the air intake port to match the width of the medium 99. The cover 64 may be positioned so as to overlap the second air intake port 51. The movable unit 63 may have one or more covers 64 that overlap the first air intake port 50 and one or more covers 64 that overlap the second air intake port 51.

[0112] 10, the movable part 63 may have a shutter member 71. The shutter member 71 is attached to the duct 57. In this modification, the shutter member 71 is located in the duct 57 between the exhaust port 52 and the fan 58. The shutter member 71 may also be located in the duct 57 between the fan 58 and the exhaust mechanism 16.

[0113] The shutter member 71 moves to change the flow area of ​​the duct 57. By changing the flow area of ​​the duct 57, the shutter member 71 changes the flow resistance to the air exhausted from the exhaust port 52. By changing the flow area of ​​the duct 57, the shutter member 71 changes the ease of exhaust. The shutter member 71 may be configured to open and close the duct 57.

[0114] When the exhaust volume is insufficient, the shutter member 71 increases the flow path area of ​​the duct 57. This makes it easier for the exhaust volume to increase. As a result, the temperature inside the drying furnace 47 is less likely to rise. When the exhaust volume is excessive, the shutter member 71 decreases the flow path area of ​​the duct 57. This makes it easier for the exhaust volume to decrease. As a result, the temperature inside the drying furnace 47 is less likely to drop.

[0115] As shown in FIG. 11 , the duct 57 may have a main body portion 72. The main body portion 72 is a portion that extends from the drying oven 47. The main body portion 72 is connected to the drying oven 47. The main body portion 72 communicates with the exhaust port 52. The main body portion 72 is connected to the exhaust mechanism 16. The fan 58 is located in the main body portion 72.

[0116] The duct 57 may have one or more branch portions. In this modified example, the duct 57 has two branch portions. Specifically, the duct 57 has a first branch portion 73 and a second branch portion 74. The branch portion is a portion that branches off from the main body portion 72. For example, the branch portion branches off between the fan 58 and the exhaust mechanism 16 in the main body portion 72. That is, the fan 58 is located in the main body portion 72 between the branch portion and the drying oven 47. The branch portion extends inside the factory 15. In one example, the branch portion extends downward from the main body portion 72 and then bends to extend upward.

[0117] A branch port opens at the branch portion. More specifically, a first branch port 75 opens at the first branch portion 73. A second branch port 76 opens at the second branch portion 74. The branch port is an opening through which air flows in and out. The branch port is connected to the inside of the factory 15. The branch portion takes in and exhausts air through the branch port.

[0118] Duct 57 takes in air into main body 72 through a branching portion, or exhausts air from main body 72 through a branching portion, depending on the difference between the airflow rate of fan 58 and the airflow rate of exhaust fan 18. Normally, it is preferable that the airflow rate of exhaust fan 18 is greater than the airflow rate of fan 58. In this case, air can be smoothly exhausted from drying device 13 to the outside of factory 15.

[0119] If the airflow rate of the exhaust fan 18 is small relative to the airflow rate of the fan 58, there is a risk that the exhaust from the exhaust section 56 to the exhaust mechanism 16 will be stagnated. If the airflow rate from the exhaust section 56 to the exhaust mechanism 16 is stagnated, there is a risk that the amount of exhaust from the drying oven 47 will be insufficient. In contrast, in this modified example, if the airflow rate of the exhaust fan 18 is small relative to the airflow rate of the fan 58, i.e., if there is a risk that the amount of exhaust will be insufficient, air flows from the main body section 72 to the branch section. That is, the exhaust section 56 exhausts air from the branch port. The fan 58 sends the air exhausted from the drying oven 47 to the exhaust mechanism 16 and the branch section. This reduces the risk of an insufficient amount of exhaust.

[0120] If the airflow rate of exhaust fan 18 is excessively large compared to the airflow rate of fan 58, there is a risk of excessive exhaust air from drying oven 47. In contrast, in this modified example, if the airflow rate of exhaust fan 18 is excessively large compared to the airflow rate of fan 58, i.e., if there is a risk of excessive exhaust air, air flows from the branch portion to main body portion 72. That is, exhaust unit 56 takes in air from the branch port. Fan 58 sends the air exhausted from drying oven 47 to exhaust mechanism 16 together with the air flowing into main body portion 72 through the branch portion. This reduces the risk of excessive exhaust air.

[0121] As shown in FIG. 11 , the branch portion may have a trap portion. Specifically, the first branch portion 73 may have a first trap portion 77. The second branch portion 74 may have a second trap portion 78. The trap portion is a portion that receives liquid. The trap portion is a portion of the branch portion that is bent downward to form a convex shape. The exhaust gas flowing through the main portion 72 may be cooled as it flows through the branch portion. In this case, steam liquefies in the branch portion. The liquefied liquid accumulates in the trap portion. The accumulation of the liquefied liquid in the trap portion reduces the amount of steam discharged through the branch port. If the branch portion does not have a trap portion, there is a risk that steam will be discharged directly into the factory 15. Furthermore, if the branch portion does not have a trap portion, there is a risk that the liquefied liquid will drip from the branch port or flow into the main portion 72.

[0122] As shown in FIG. 11, the movable portion 63 may have one or more opening and closing members. In this modification, the movable portion 63 has two opening and closing members. Specifically, the movable portion 63 has a first opening and closing member 79 and a second opening and closing member 80. The opening and closing members are located at branched portions. The first opening and closing member 79 is located at the first branched portion 73. The second opening and closing member 80 is located at the second branched portion 74.

[0123] The opening and closing members are configured to open and close the branch portions. The first opening and closing member 79 is configured to open and close the first branch portion 73. The second opening and closing member 80 is configured to open and close the second branch portion 74. The first opening and closing member 79 and the second opening and closing member 80 may move in conjunction with each other, or may move independently to open and close. The opening and closing members may be configured to change the flow path area of ​​the branch portion.

[0124] The opening / closing member adjusts the amount of exhaust by opening and closing the branching portion. When the opening / closing member opens and closes the branching portion, the flow resistance to the air exhausted from the exhaust port 52 changes. When the flow resistance changes, the ease of exhaust changes. In this way, the opening / closing member adjusts the amount of exhaust.

[0125] The opening / closing member opens or closes the branch portion depending on the difference between the airflow rate of the fan 58 and the airflow rate of the exhaust fan 18. The opening / closing member opens the branch portion when the airflow rate of the exhaust fan 18 is small compared to the airflow rate of the fan 58, or when the airflow rate of the exhaust fan 18 is excessively large compared to the airflow rate of the fan 58. In other words, the opening / closing member opens the branch portion when the exhaust rate is excessive or insufficient. By opening the branch portion, the opening / closing member adjusts the exhaust rate of air discharged from the exhaust port 52. For example, when the exhaust from the drying oven 47 is stagnant, i.e., when the exhaust rate is insufficient, the opening / closing member opens the branch portion, causing the air to be exhausted from the branch port. By exhausting from the branch port, the exhaust rate from the drying oven 47 increases. When the exhaust from the drying oven 47 is excessive, i.e., when the exhaust rate is excessive, the opening / closing member opens the branch portion, causing air to be drawn in from the branch port. By drawing in air from the branch port, the exhaust rate from the drying oven 47 decreases.

[0126] 12, the drying oven 47 may have a first portion 82 and a second portion 83. The second portion 83 is attached to the first portion 82 so as to be openable and closable. The second portion 83 exposes the interior of the drying oven 47 by opening relative to the first portion 82. The second portion 83 may be opened and closed automatically by the control unit 62, or may be opened and closed manually by the user.

[0127] If the conveying section 32 stops due to a jam of the medium 99, a printing error, or the like, the medium 99 stops inside the drying oven 47. In this case, there is a risk that the medium 99 will be overheated inside the drying oven 47. For this reason, in the drying unit 46, when the conveying section 32 stops, the second section 83 opens. This allows the temperature inside the drying oven 47 to drop quickly. This reduces the risk that the medium 99 will be overheated. When the conveying section 32 stops, the heating section 53 may also stop.

[0128] The drying device 13 may be configured integrally with the printing device 12. For example, the drying device 13 may have a printing unit 27. In this case, the drying oven 47 may be configured so that the heat from the heating unit 53 does not easily reach the printing unit 27.

[0129] <Technical philosophy> The technical concepts and effects that can be understood from the above-described embodiment and modified examples will be described below.

[0130] (A) A drying device includes a drying oven into which a transported medium enters, a heating unit that heats the medium in the drying oven, an exhaust unit that exhausts air from the drying oven, and a movable unit configured to move. The drying oven has an intake port through which air flows into the drying oven from outside the drying oven, and the exhaust unit has a duct extending from the drying oven and a fan that exhausts air from inside the drying oven to outside the drying oven through the duct. The movable unit adjusts, by movement, at least one of the intake volume of air flowing in through the intake port and the exhaust volume of air exhausted from the drying oven. Changes in the intake volume or exhaust volume cause the temperature inside the drying oven to rise or fall. For example, an increase in the intake volume tends to decrease the temperature inside the drying oven. A decrease in the intake volume tends to increase the temperature inside the drying oven. An increase in the exhaust volume tends to decrease the temperature inside the drying oven. A decrease in the exhaust volume tends to increase the temperature inside the drying oven. According to the above configuration, when the exhaust volume is insufficient, the movable part moves to increase the intake volume or increase the exhaust volume, thereby preventing the temperature inside the drying oven from rising. When the exhaust volume is excessive, the movable part moves to decrease the intake volume or decrease the exhaust volume, thereby preventing the temperature inside the drying oven from dropping. This allows the drying device to properly dry the media.

[0131] (B) In the above drying device, the movable part may change the flow path resistance for the air flowing in from the air intake port by moving. When the flow path resistance increases as the movable part moves, the amount of intake air is likely to decrease. When the flow path resistance decreases as the movable part moves, the amount of intake air is likely to increase. According to the above configuration, when the exhaust volume is insufficient, the movable part moves to reduce the flow path resistance, making it difficult for the temperature inside the drying oven to rise. When the exhaust volume is excessive, the movable part moves to increase the flow path resistance, making it difficult for the temperature inside the drying oven to decrease.

[0132] (C) In the above-described drying device, the movable part may include a tubular member attached to the drying furnace so as to fit into the air intake port. The tubular member may have an inlet through which air flows into the drying furnace from outside the drying furnace, and the tubular member may move to change the amount of protrusion relative to the drying furnace. When the amount of protrusion of the tubular member relative to the drying furnace increases, the air flow path from outside the drying furnace into the drying furnace becomes longer, making it more difficult for air to flow into the drying furnace. In other words, the increased flow path resistance tends to reduce the amount of intake air. When the amount of protrusion of the tubular member relative to the drying furnace decreases, the air flow path from outside the drying furnace into the drying furnace becomes shorter, making it easier for air to flow into the drying furnace. In other words, the reduced flow path resistance tends to increase the amount of intake air. According to the above configuration, when the exhaust volume is insufficient, the tubular member moves to reduce the amount of protrusion, thereby preventing the temperature inside the drying furnace from rising. When the exhaust volume is excessive, the tubular member moves to increase the amount of protrusion, thereby preventing the temperature inside the drying furnace from dropping.

[0133] (D) In ​​the above drying device, the movable part may have a cover attached to the drying oven, and the cover may change the flow path area of ​​the air intake port by moving. When the flow path area of ​​the air intake port becomes smaller, it becomes more difficult for air to flow into the drying oven. In other words, the flow path resistance increases, making it easier for the intake volume to decrease. When the flow path area of ​​the air intake port becomes larger, it becomes easier for air to flow into the drying oven. In other words, the flow path resistance decreases, making it easier for the intake volume to increase. According to the above configuration, when the exhaust volume is insufficient, the cover moves to increase the flow path area of ​​the air intake port, making it harder for the temperature inside the drying oven to rise. When the exhaust volume is excessive, the cover moves to reduce the flow path area of ​​the air intake port, making it harder for the temperature inside the drying oven to drop.

[0134] (E) In the drying device, the cover may be slid vertically to change the flow path area of ​​the air inlet. With this configuration, the flow path area of ​​the air inlet can be easily changed.

[0135] (F) In the drying device, the cover may be slid in a width direction different from the vertical direction to change the flow path area of ​​the air intake. With this configuration, the flow path area of ​​the air intake can be easily changed.

[0136] (G) In the drying device, the cover may be opened and closed to change the flow path area of ​​the air inlet. With this configuration, the flow path area of ​​the air inlet can be easily changed.

[0137] (H) In the above drying device, the movable part may be configured to change the flow resistance of the air discharged from the drying oven by the exhaust part by moving. When the flow resistance increases as the movable part moves, the exhaust volume is likely to decrease. When the flow resistance decreases as the movable part moves, the exhaust volume is likely to increase. According to the above configuration, when the exhaust volume is insufficient, the movable part moves to reduce the flow resistance, making it difficult for the temperature inside the drying oven to rise. When the exhaust volume is excessive, the movable part moves to increase the flow resistance, making it difficult for the temperature inside the drying oven to decrease.

[0138] (I) A drying device includes a drying oven into which a transported medium enters, a heating unit that heats the medium within the drying oven, an exhaust unit that exhausts air from the drying oven, and a movable unit configured to move. The drying oven has an intake port through which air flows into the drying oven from outside the drying oven. The exhaust unit has a duct extending from the drying oven and a fan that exhausts air from inside the drying oven to outside the drying oven through the duct. The movable unit adjusts at least one of the air volume and air speed of the air flowing along the medium within the drying oven by moving. When the air volume or air speed of the air flowing along the medium changes, the temperature of the medium rises or falls. For example, if the air volume or air speed increases, the temperature of the medium is likely to fall. When the air volume or air speed decreases, the temperature of the medium is likely to rise. When the exhaust volume increases, the temperature inside the drying oven is likely to fall. In this case, the drying volume may be insufficient. When the exhaust volume decreases, the temperature inside the drying oven is likely to rise. In this case, there is a risk that the medium will be over-dried. According to the above configuration, when the exhaust volume is insufficient, the movable part moves to increase the air volume or speed, thereby making it difficult for the temperature of the medium to rise. When the exhaust volume is excessive, the movable part moves to decrease the air volume or speed, thereby making it difficult for the temperature of the medium to drop. This allows the drying device to properly dry the medium.

[0139] (J) In the above drying device, the heating unit is positioned to face the medium, and the movable unit has a rectifying vane that guides the air flowing in from the air intake so that it flows along the medium, and the rectifying vane may move to change at least one of the volume and speed of the air flowing along the medium in the drying oven. According to the above configuration, when the exhaust volume is insufficient, the rectifying vane moves to increase at least one of the volume and speed of the air flowing along the medium, thereby making it difficult for the temperature of the medium to rise. When the exhaust volume is excessive, the rectifying vane moves to decrease at least one of the volume and speed of the air flowing along the medium, thereby making it difficult for the temperature of the medium to drop.

[0140] (K) In the above drying device, the movable part may have a shutter member that changes the flow area of ​​the duct by moving. When the flow area of ​​the duct is increased, it becomes easier to exhaust air from the drying oven. In other words, the flow resistance to the exhaust air becomes smaller, making it easier to increase the exhaust volume. When the flow area of ​​the duct is reduced, it becomes harder to exhaust air from the drying oven. In other words, the flow resistance to the exhaust air becomes larger, making it easier to decrease the exhaust volume. According to the above configuration, when the exhaust volume is insufficient, the shutter member moves to increase the flow area of ​​the duct, making it harder for the temperature inside the drying oven to rise. When the exhaust volume is excessive, the shutter member moves to reduce the flow area of ​​the duct, making it harder for the temperature inside the drying oven to drop.

[0141] (L) In the above drying apparatus, the duct may have a main body extending from the drying oven and a branching portion branching from the main body, the fan being located in the main body between the branching portion and the drying oven, the branching portion having a branching port through which air enters and exits, and the movable portion having an opening / closing member for opening and closing the branching portion. According to the above configuration, when the exhaust volume is insufficient, the opening / closing member opens the branching portion, thereby drawing in air through the branching port. Drawing in air through the branching port reduces the exhaust volume from the drying oven, making it difficult for the temperature inside the drying oven to drop. When the exhaust volume is excessive, the opening / closing member opens the branching portion, thereby allowing air to be exhausted through the branching port. Exhausting air through the branching port increases the exhaust volume from the drying oven, making it difficult for the temperature inside the drying oven to rise. In this way, opening the branching portion eliminates any excess or deficiency in the exhaust volume.

[0142] (M) In the drying device described above, the branch portion may be a first branch portion, the duct may have a second branch portion branching from the main body portion, the opening / closing member may be a first opening / closing member, and the movable portion may have a second opening / closing member located at the second branch portion. According to the above configuration, the first opening / closing member opens the first branch portion, and the second opening / closing member opens the second branch portion, thereby making it easier to eliminate any excess or deficiency in the amount of exhaust air.

[0143] (N) In the drying device described above, the branching portion may have a trap portion for receiving liquid. In the branching portion, steam may be cooled and liquefied as it flows. With the above configuration, the trap portion collects the liquefied liquid, thereby reducing the amount of steam discharged through the branching port.

[0144] (O) In the drying device, the drying oven may have an opening for passing the medium therethrough, and the intake port may be an opening separate from the opening. With this configuration, the risk of the moving parts coming into contact with the medium is reduced.

[0145] (P) The drying device may include a detector that detects a state of the drying device, and a controller that controls the movable part based on the detection result of the detector. With this configuration, the movable part can operate appropriately based on the state of the drying device.

[0146] (Q) The drying device may include a control unit that receives printing information from a printing device that prints an image on a medium, and the control unit may control the movable unit based on the printing information. With the above configuration, the movable unit can operate appropriately based on the printing information.

[0147] The (R) printing device includes a printing unit that prints an image on a medium, a drying oven into which the printed medium enters, a heating unit that heats the medium in the drying oven, an exhaust unit that exhausts air from the drying oven, and a movable unit configured to move, wherein the drying oven has an air intake opening through which air flows into the drying oven from outside, and the exhaust unit has a duct extending from the drying oven and a fan that exhausts air from inside the drying oven to outside the drying oven through the duct, and the movable unit adjusts at least one of the amount of air intake flowing in through the air intake opening and the amount of air exhausted from the drying oven by movement. With the above configuration, the same effect as the drying device described above can be obtained.

[0148] (S) A printing device includes a printing unit that prints an image on a medium, a drying oven into which the printed medium enters, a heating unit that heats the medium in the drying oven, an exhaust unit that exhausts air from the drying oven, and a movable unit configured to move, wherein the drying oven has an air intake opening through which air flows into the drying oven from outside the drying oven, and the exhaust unit has a duct extending from the drying oven and a fan that exhausts air from inside the drying oven to outside the drying oven through the duct, and the movable unit adjusts at least one of the volume and speed of the air flowing along the medium in the drying oven by moving. With the above configuration, the same effect as the drying device described above can be obtained. [Explanation of symbols]

[0149] 11...printing system, 12...printing device, 13...drying device, 14...input section, 15...factory, 16...exhaust mechanism, 17...exhaust duct, 18...exhaust fan, 21...feeding unit, 22...feeding case, 23...feeding section, 24...feeding shaft, 25...printing unit, 26...casing, 27...printing section, 28...head, 29...nozzle, 30...nozzle surface, 31...carriage, 32...conveying section, 33...first pulley, 34...second pulley, 35...belt, 36...first printing guide roller, 37...second printing guide roller, 38...printing control section, 41...winding unit, 42...winding case, 43...winding section, 44...winding shaft, 45...dancer roller, 46...drying unit, 47...drying oven, 48...first passage port, 49...second passage port, 50...first intake port, 51... Second intake port, 52...exhaust port, 53...heating unit, 54...heating element, 55...reflector, 56...exhaust unit, 57...duct, 58...fan, 59...first drying guide roller, 60...second drying guide roller, 61...detection unit, 62...control unit, 63...movable part, 64...cover, 65...rectifying plate, 66...guide flow path, 67...fixed part, 68...movable part, 69...cylindrical member, 70...inlet , 71...shutter member, 72...main body portion, 73...first branch portion, 74...second branch portion, 75...first branch outlet, 76...second branch outlet, 77...first trap portion, 78...second trap portion, 79...first opening / closing member, 80...second opening / closing member, 82...first portion, 83...second portion, 99...medium, D1...conveying direction, D2...width direction, R1...first roll body, R2...second roll body.

Claims

1. a drying oven into which the medium to be conveyed enters; a heating unit that heats the medium in the drying furnace; an exhaust section for exhausting air from the drying furnace; a movable part configured to move; The drying furnace has an air intake port through which air flows into the drying furnace from outside the drying furnace, The exhaust section is a duct extending from the drying oven; a fan that exhausts air from inside the drying oven to outside the drying oven through the duct, The drying device is characterized in that the movable part adjusts at least one of the amount of air intake flowing in through the air intake port and the amount of air exhausted from the drying oven by moving.

2. 2. The drying device according to claim 1, wherein the movable portion changes flow resistance to the air flowing in through the air intake port by moving.

3. the movable portion has a cylindrical member attached to the drying furnace so as to fit into the air intake port, an inlet through which air flows from outside the drying furnace into the drying furnace is opened in the cylindrical member; 3. The drying apparatus according to claim 2, wherein the cylindrical member changes the amount of protrusion relative to the drying oven by moving.

4. the movable portion has a cover attached to the drying oven, 3. The drying device according to claim 2, wherein the cover moves to change the flow area of ​​the air intake port.

5. The drying device according to claim 4 , wherein the cover is slidable in a vertical direction to change the flow path area of ​​the air intake port.

6. The drying device according to claim 4 , wherein the cover is slidable in a width direction different from a vertical direction to change the flow path area of ​​the air intake port.

7. The drying device according to claim 4, wherein the cover changes the flow path area of ​​the air intake port by opening and closing the cover.

8. The drying apparatus according to claim 1 , wherein the movable portion is configured to change, by movement, a flow resistance to the air discharged from the drying oven by the exhaust portion.

9. a drying oven into which the medium to be conveyed enters; a heating unit that heats the medium in the drying furnace; an exhaust section for exhausting air from the drying furnace; a movable part configured to move; The drying furnace has an air intake port through which air flows into the drying furnace from outside the drying furnace, The exhaust section is a duct extending from the drying oven; a fan that exhausts air from inside the drying oven to outside the drying oven through the duct, The drying device is characterized in that the movable part adjusts at least one of the volume and speed of air flowing along the medium in the drying furnace by moving.

10. the heating unit is positioned to face the medium, the movable portion has a flow straightening plate that defines a guide flow path that guides the air flowing in from the air inlet so that the air flows along the medium; 10. The drying device according to claim 9, wherein the straightening plate adjusts at least one of the volume and speed of air flowing along the medium in the drying furnace by moving.

11. 9. The drying device according to claim 8, wherein the movable portion has a shutter member that changes the flow area of ​​the duct by moving.

12. The duct is a main body portion extending from the drying oven; a branch portion branching from the main body portion, the fan is located in the main body between the branch portion and the drying oven; A branch port through which air flows in and out is opened in the branch portion, The drying device according to claim 1 , wherein the movable portion has an opening / closing member that opens and closes the branch portion.

13. the branched portion is a first branched portion, the duct has a second branch portion branching from the main body portion; the opening / closing member is a first opening / closing member, The drying device according to claim 12, wherein the movable portion has a second opening / closing member located at the second branch portion.

14. The drying device according to claim 12, wherein the branched portion has a trap portion for receiving liquid.

15. The drying furnace has a passage opening through which the medium passes, 15. The drying device according to claim 1, wherein the intake port is an opening different from the passage port.

16. a detection unit that detects a state of the drying device; The drying device according to claim 1 , further comprising: a control unit that controls the movable unit based on a detection result of the detection unit.

17. a control unit that receives print information from a printing device that prints an image on a medium; The drying device according to claim 1 , wherein the control unit controls the movable unit based on the print information.

18. a printing unit that prints an image on a medium; a drying oven into which the printed medium enters; a heating unit that heats the medium in the drying furnace; an exhaust section for exhausting air from the drying furnace; a movable part configured to move; The drying furnace has an air intake port through which air flows into the drying furnace from outside the drying furnace, The exhaust section is a duct extending from the drying oven; a fan that exhausts air from inside the drying oven to outside the drying oven through the duct, The printing device is characterized in that the movable part adjusts at least one of the amount of air intake flowing in through the air intake port and the amount of air exhausted from the drying oven by moving.

19. a printing unit that prints an image on a medium; a drying oven into which the printed medium enters; a heating unit that heats the medium in the drying furnace; an exhaust section for exhausting air from the drying furnace; a movable part configured to move; The drying furnace has an air intake port through which air flows into the drying furnace from outside the drying furnace, The exhaust section is a duct extending from the drying oven; a fan that exhausts air from inside the drying oven to outside the drying oven through the duct, The printing device is characterized in that the movable part adjusts at least one of the volume and speed of air flowing along the medium in the drying oven by moving.

Images