Drying device and recording device

Abstract

To provide a drying device and a recording device that are able to dry a medium without deteriorating the recording quality of the medium.SOLUTION: A drying device includes: a drying unit that dries a medium to which a liquid is ejected by generating an electromagnetic wave in response to application of a high-frequency voltage; and a suction unit that sucks a gas. The drying unit includes: a first electrode; a second electrode disposed so as to surround the first electrode in a plan view from a first direction toward the medium; a first conductor having a coil and configured to electrically connect the first electrode and a transmission line capable of transmitting a high-frequency voltage; and a second conductor configured to electrically connect the transmission line and the second electrode. The suction unit includes a suction port that sucks a gas evaporated from a medium to which the liquid has been ejected.SELECTED DRAWING: Figure 2

Description

Technical Field

[0001] The present invention relates to a drying device and a recording device.

Background Art

[0002] For example, as disclosed in Patent Document 1, there is disclosed a drying device that dries a medium by generating electromagnetic waves with respect to the medium on which a liquid has been discharged. Such a drying device generates electromagnetic waves with respect to the medium by supplying a high-frequency voltage between a first electrode and a second electrode. As a result, regardless of whether the water vapor is saturated around the medium, the medium can be dried by boiling the liquid discharged onto the medium.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] However, in such a drying device, when the gas containing the boiled liquid cools, the liquid contained in the gas may condense. In some cases, the condensed liquid may drip onto the medium. Therefore, it is desired to dry the medium without degrading the recording quality of the medium.

Means for Solving the Problems

[0005] The drying device for solving the above problems includes a drying unit that dries a medium from which a liquid has been discharged by generating electromagnetic waves in response to the application of a high-frequency voltage, and an intake unit that intakes gas. The drying unit includes a first electrode, a second electrode disposed so as to surround the first electrode in a plan view from a first direction toward the medium, a transmission line having a coil and capable of transmitting a high-frequency voltage, a first conductor that electrically connects the transmission line and the first electrode, and a second conductor that electrically connects the transmission line and the second electrode. The intake unit has an intake port that intakes gas evaporated from the medium from which the liquid has been discharged.

[0006] The recording device for solving the above problems includes a recording unit that performs recording by discharging a liquid onto a medium, a drying unit that dries the medium from which the liquid has been discharged by the recording unit by generating electromagnetic waves in response to the application of a high-frequency voltage, and an intake unit that intakes gas. The drying unit includes a first electrode, a second electrode disposed so as to surround the first electrode in a plan view from a first direction toward the medium, a transmission line having a coil and capable of transmitting a high-frequency voltage, a first conductor that electrically connects the transmission line and the first electrode, and a second conductor that electrically connects the transmission line and the second electrode. The intake unit has an intake port that intakes gas evaporated from the medium from which the liquid has been discharged.

Brief Description of the Drawings

[0007]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Figure 6

Figure 7

Figure 8

Embodiments for Carrying Out the Invention

[0008] [First Embodiment] Hereinafter, an embodiment of a recording system including a drying device and a recording device will be described. In the following description, the direction intersecting the vertical direction Z is defined as the width direction X, and the direction intersecting the vertical direction Z and the width direction X is defined as the depth direction Y. One direction along the width direction X is defined as the first width direction X1, and the other direction along the width direction X is defined as the second width direction X2. One direction along the depth direction Y is defined as the first depth direction Y1, and the other direction along the depth direction Y is defined as the second depth direction Y2. The upper part of the vertical direction Z is defined as the upper Z1, and the lower part of the vertical direction Z is defined as the lower Z2. The vertical direction Z corresponds to an example of the first direction. The width direction X corresponds to an example of the second direction. The depth direction Y corresponds to an example of the third direction.

[0009] <Configuration of Recording System 10> As shown in FIG. 1, the recording system 10 is a system for performing recording on the medium 90. In particular, the recording system 10 is a system for performing recording on the medium 90 by discharging a liquid onto the medium 90. The recording system 10 is a system for drying the medium 90 after recording with the discharged liquid.

[0010] The recording system 10 includes a recording device 11. The recording device 11 is configured to perform recording on the medium 90. In particular, the recording device 11 performs recording on the medium 90 by discharging a liquid onto the medium 90. The recording device 11 may be an inkjet printer that performs recording by discharging ink, which is an example of a liquid, onto the medium 90. The medium 90 includes a front surface 90A and a back surface 90B. The medium 90 is a fabric, but may be, for example, paper.

[0011] The recording system 10 includes a drying device 12. The drying device 12 is configured to dry the medium 90 after recording in which the recording device 11 has ejected a liquid. In particular, the drying device 12 dries the medium 90 after recording by generating electromagnetic waves.

[0012] The recording system 10 includes a feeding unit 13. The feeding unit 13 feeds out the medium 90 before recording to the recording device 11. The feeding unit 13 includes a feeding roller 13A. The feeding roller 13A extends along the width direction X. In the width direction X, the width of the feeding roller 13A is longer than the width of the medium 90. The feeding roller 13A is configured to rotatably hold the first roll body 91. The first roll body 91 is the medium 90 before recording wound up. The medium 90 may be long. Thus, the feeding roller 13A holds the medium 90 fed out to the recording device 11.

[0013] The recording system 10 includes a winding unit 14. The winding unit 14 winds up the medium 90 after recording recorded by the recording device 11. In particular, the winding unit 14 winds up the medium 90 after recording dried by the drying device 12. The winding unit 14 includes a winding roller 14A. The winding roller 14A extends along the width direction X. In the width direction X, the width of the winding roller 14A is longer than the width of the medium 90. The winding roller 14A is configured to rotatably hold the second roll body 92. The second roll body 92 is the medium 90 after recording wound up. Thus, the winding roller 14A winds up the medium 90 recorded by the recording device 11 and dried by the drying device 12.

[0014] <Configuration of the recording device 11> Here, the configuration of the recording device 11 will be described in detail. The recording device 11 includes a recording unit 20, a recording support unit 21, and a recording conveyance unit 22. The recording unit 20 is configured to perform recording on the medium 90 by discharging liquid onto the medium 90. The recording unit 20 is configured to perform recording on the medium 90 by discharging liquid onto the surface 90A of the medium 90. The recording unit 20 performs recording on the medium 90 supported by the recording support unit 21. The recording unit 20 performs recording on the medium 90 conveyed by the recording conveyance unit 22.

[0015] The recording unit 20 includes a head 23. The head 23 may be a serial head or a line head. The serial head is a head that scans in the width direction X of the medium 90. The line head is a head that performs recording simultaneously across the width direction X of the medium 90.

[0016] The head 23 includes a nozzle surface 24 through which a plurality of nozzles (not shown) open. The nozzle surface 24 is a surface facing downward Z2. The nozzle surface 24 is a surface facing the surface 90A of the medium 90 conveyed by the recording conveyance unit 22. Each of the plurality of nozzles is configured to open downward Z2. Each of the plurality of nozzles is configured to discharge liquid.

[0017] The recording unit 20 may include a recording carriage 25 and a recording carriage support unit 26. The recording carriage 25 is configured to support the head 23. The recording carriage support unit 26 extends along the width direction X. The recording carriage support unit 26 supports the recording carriage 25 so as to be movable along the width direction X. The recording carriage 25 is movable along the width direction X along the recording carriage support unit 26 by a driving force from a driving source (not shown).

[0018] The recording support unit 21 is configured to support the medium 90 conveyed by the recording conveyance unit 22. The recording support unit 21 is located below Z2 the recording unit 20. The recording support unit 21 supports the back surface 90B of the medium 90 conveyed by the recording conveyance unit 22. The recording support unit 21 is located below Z2 the head 23.

[0019] The recording and conveying unit 22 is configured to convey the medium 90 in the conveying direction D. The conveying direction D is a direction along the depth direction Y. The recording and conveying unit 22 may include a plurality of rollers. The recording and conveying unit 22 conveys the medium 90 in the conveying direction D using a plurality of rollers, but may also convey the medium 90 in the conveying direction D using a conveying belt driven by a plurality of rollers. The recording and conveying unit 22 may perform intermittent conveyance that repeats the conveyance and stop of the medium 90.

[0020] <Configuration of the drying device 12> Next, the configuration of the drying device 12 will be described in detail. The drying device 12 includes a drying unit 30. The drying unit 30 is configured to dry the medium 90 after recording. That is, the drying device 12 uses the medium 90 recorded by the recording unit 20 as the object to be dried.

[0021] The drying unit 30 is configured to dry the medium 90 after recording by generating electromagnetic waves. The drying unit 30 is located above Z1 of the medium 90, but may also be located below Z2 of the medium 90, or may be located at both above Z1 and below Z2 of the medium 90. In this way, the vertical direction Z is the direction toward the medium 90.

[0022] The drying device 12 includes a high-frequency voltage generation unit 31. The high-frequency voltage generation unit 31 is configured to generate a high-frequency voltage. The high-frequency voltage generation unit 31 supplies a high-frequency voltage to the drying unit 30 via a transmission line 32.

[0023] The transmission line 32 is a line that connects the drying unit 30 and the high-frequency voltage generation unit 31. The transmission line 32 can transmit the high-frequency voltage from the high-frequency voltage generation unit 31 to the drying unit 30. That is, the transmission line 32 can transmit the high-frequency voltage.

[0024] The transmission line 32 may be a coaxial cable, but is not limited to a coaxial cable. The transmission line 32 may include a first line and a second line. The first line may be the core wire of the transmission line 32. The second line may be an electromagnetic shield that covers the first line.

[0025] The drying device 12 includes a drying conveyance unit 33. The drying conveyance unit 33 is configured to convey the medium 90 in the conveyance direction D. The drying conveyance unit 33 may convey the medium 90 in the conveyance direction D using a plurality of rollers. The drying conveyance unit 33 may perform continuous conveyance to continuously convey the medium 90. Slack of the medium 90 may occur between the recording conveyance unit 22 and the drying conveyance unit 33.

[0026] The drying device 12 includes a drying support unit 34. The drying support unit 34 is configured to support the medium 90 conveyed by the drying conveyance unit 33. The drying support unit 34 is located below Z2 of the drying unit 30. The drying support unit 34 supports the back surface 90B of the medium 90 conveyed by the drying conveyance unit 33. The drying support unit 34 is located below Z2 of the drying unit 36 described later.

[0027] The drying device 12 includes a control unit 35. The control unit 35 controls the drying device 12. Specifically, the control unit 35 controls the drying unit 30. In particular, the control unit 35 controls, as the drying unit 30, the drying unit 36, the intake unit 37, and the drying carriage 38 described later. The control unit 35 controls the high-frequency voltage generation unit 31. The control unit 35 controls the drying conveyance unit 33.

[0028] The control unit 35 may be composed of one or more processors that execute various processes according to a computer program. The control unit 35 may be composed of one or more dedicated hardware circuits. The control unit 35 may be composed of an application-specific integrated circuit that executes at least some of the various processes. The control unit 35 may be composed of a circuit including a combination of a processor and a hardware circuit. The processor includes a CPU and memories such as a RAM and a ROM. The memory stores program code or instructions configured to cause the CPU to execute processes. The memory, that is, the computer-readable medium, includes any readable medium accessible by a general-purpose or dedicated computer.

[0029] <Configuration of the drying unit 30> Next, the configuration of the drying unit 30 will be described with reference to FIGS. 2 to 4. As shown in FIGS. 2 and 3, the drying unit 30 includes a drying section 36. That is, the drying device 12 includes the drying section 36. The drying section 36 may be rectangular in plan view from the vertical direction Z. The drying section 36 may be arranged such that the width direction X is the longitudinal direction.

[0030] The drying section 36 is configured to generate electromagnetic waves in response to the application of a high-frequency voltage. The drying section 36 generates electromagnetic waves in response to the application of a high-frequency voltage. Thereby, the drying section 36 is configured to dry the medium 90 from which the liquid has been discharged by the recording section 20. The drying section 36 is an electromagnetic wave generation section.

[0031] The drying section 36 generates an alternating electric field by the generation of electromagnetic waves. The electromagnetic waves generated by the drying section 36 have an electric field as the main component. The drying section 36 can extremely reduce the induction of a magnetic field by the generated electric field as compared with an electromagnetic wave generation section that generates ordinary electromagnetic waves.

[0032] To give a specific example, the drying unit 36 generates electromagnetic waves of 2.4 GHz, but is not limited thereto. The drying unit 36 may generate electromagnetic waves of, for example, 3 MHz to 300 MHz. The drying unit 36 may generate electromagnetic waves of, for example, 300 M to 30 GHz, and among them, may generate electromagnetic waves of 10 MHz to 20 GHz.

[0033] The drying unit 36 dries the medium 90 by heating the medium 90 from the surface 90A. Specifically, the drying unit 36 heats the liquid discharged onto the medium 90 from the surface 90A. The drying unit 36 dries the medium 90 by evaporating the liquid discharged onto the medium 90. That is, the drying unit 36 is a method of drying the medium 90 regardless of whether the water vapor is saturated around the medium 90. For this reason, the drying unit 36 does not need to blow dry gas in which the water vapor is not saturated around the medium 90.

[0034] <Configuration of the drying unit 36> As shown in FIG. 4, the drying unit 36 includes a first electrode 41, a second electrode 42, a first conductor 43, and a second conductor 44. The drying unit 36 may include an opposing portion 45. FIG. 3 is a diagram excluding the top plate 44C of the second conductor 44 for convenience. FIG. 4 is a diagram in which the first electrode 41 and the second electrode 42 are arranged on the lower Z2 side.

[0035] The first electrode 41 has a flat plate shape. The first electrode 41 may be rectangular with the width direction X being the longitudinal direction in a plan view. The first electrode 41 includes a first electrode surface 41A. The first electrode surface 41A is a surface facing downward in the Z2 direction. That is, the first electrode surface 41A is a surface facing the surface 90A of the medium 90. The first electrode 41 is arranged such that the first electrode surface 41A abuts against the opposing portion 45.

[0036] The second electrode 42 has a flat plate shape. The second electrode 42 includes a second electrode surface 42A. The second electrode surface 42A is a surface facing downward in the Z2 direction. That is, the second electrode surface 42A is a surface facing the surface 90A of the medium 90. The second electrode 42 is arranged such that the second electrode surface 42A abuts against the opposing portion 45.

[0037] The second electrode 42 is provided with an opening 42B. The opening 42B has a rounded rectangular shape in plan view. The first electrode 41 is located in the opening 42B. That is, the second electrode 42 is arranged so as to surround the first electrode 41 in plan view from the vertical direction Z.

[0038] The first conductor 43 is configured to electrically connect the transmission line 32 and the first electrode 41. The first conductor 43 includes a coil 43A. The coil 43A extends in the vertical direction Z. One end of the coil 43A is connected to the first electrode 41. The other end of the coil 43A is connected to a conducting wire 43B.

[0039] The second conductor 44 is configured to electrically connect the transmission line 32 and the second electrode 42. The second conductor 44 may include a support column 44A. The second conductor 44 may include a plurality of support columns 44A. The support column 44A is electrically connected to the second electrode 42. The support column 44A extends upward Z1 from the second electrode 42. The support column 44A is made of metal.

[0040] The second conductor 44 may include a connecting portion 44B. The connecting portion 44B is electrically connected to the support column 44A. The connecting portion 44B is provided at the upper end portion of the support column 44A. The connecting portion 44B connects a plurality of support columns 44A. The connecting portion 44B may be integral with the support column 44A. The connecting portion 44B may have an H shape in plan view. The connecting portion 44B is made of metal.

[0041] The second conductor 44 may include a top plate 44C. The top plate 44C is located above Z1 of the connecting portion 44B. The top plate 44C is electrically connected to the connecting portion 44B. The top plate 44C may be integral with the connecting portion 44B. The top plate 44C is made of metal.

[0042] The opposing portion 45 is positioned between the first electrode 41 and the second electrode 42 and the medium 90. The opposing portion 45 may have a flat plate shape. The opposing portion 45 is made of a material that transmits the electromagnetic waves generated by the drying portion 36. The opposing portion 45 is arranged to face the surface 90A of the medium 90. The opposing portion 45 may not be in contact with the medium 90 or may be in contact with the medium 90. The opposing portion 45 protects the first electrode 41 and the second electrode 42. The opposing portion 45 is composed of an insulating member. The opposing portion 45 may be a glass plate. The opposing portion 45 may be a ceramic with high transmittance. The opposing portion 45 may be made of a resin with a low dielectric tangent. The opposing portion 45 may be made of polypropylene. The opposing portion 45 may be made of polyethylene.

[0043] By configuring the drying portion 36 in this way, when a high-frequency voltage is applied to the first electrode 41 and the second electrode 42, the first electrode 41 and the second electrode 42 generate electromagnetic waves in response to the application of the high-frequency voltage, thereby heating the medium 90.

[0044] Such a drying portion 36 can transmit a large amount of thermal energy to the medium 90 by the generation of electromagnetic waves. The drying portion 36 is an electromagnetic wave method rather than a heat conduction method, and may not be provided with members such as heating electric wires for heating. Thereby, miniaturization of the drying portion 36 can be achieved.

[0045] Also, the minimum separation distance between the first electrode 41 and the second electrode 42 is 1 / 10 or less of the wavelength of the electromagnetic waves output from the drying portion 36. Thereby, the electromagnetic waves generated when a high-frequency voltage is applied can be attenuated in the vicinity of the first electrode 41 and the second electrode 42. Thereby, the intensity of the electromagnetic waves reaching far from the first electrode 41 and the second electrode 42 can be reduced. That is, the electromagnetic waves generated from the drying portion 36 are very strong in the vicinity of the first electrode 41 and the second electrode 42 and very weak far away.

[0046] Such a drying unit 36 can intensively generate an alternating electric field in the vicinity of the first electrode 41 and the second electrode 42 by appropriately controlling the frequency band of the generated electromagnetic wave. In other words, it is possible to suppress the influence on the surroundings due to the generation of electromagnetic waves beyond the vicinity of the first electrode 41 and the second electrode 42. As the vicinity of the first electrode 41 and the second electrode 42, for example, a range of 3 mm to 3 cm may be equivalent.

[0047] <Configuration of the intake part 37> As shown in FIGS. 2 and 3, the drying unit 30 includes an intake part 37. The intake part 37 is configured to intake gas. In particular, the intake part 37 is configured to intake the liquid evaporated from the medium 90 when the medium 90 is dried by the drying part 36.

[0048] The intake part 37 includes an intake port 50. The intake port 50 intakes the gas evaporated from the medium 90 from which the liquid has been discharged. The intake port 50 includes a first intake port 51 and a second intake port 52. The first intake port 51 is provided in the first width direction X1 with respect to the drying part 36. The second intake port 52 is provided in the second width direction X2 with respect to the drying part 36. That is, the drying part 36 is provided between the first intake port 51 and the second intake port 52 in the width direction X.

[0049] The intake part 37 includes an intake pipe 53. The intake pipe 53 is a pipe communicating with the intake port 50. The intake pipe 53 may include a first intake pipe 54, a second intake pipe 55, and a common intake pipe 56. The first intake pipe 54 is a pipe communicating with the first intake port 51. The second intake pipe 55 is a pipe communicating with the second intake port 52. The common intake pipe 56 is a pipe communicating with the first intake pipe 54 and the second intake pipe 55 at the position where the first intake pipe 54 and the second intake pipe 55 intersect. The common intake pipe 56 is a pipe communicating with an intake fan 57 described later. Part or all of the common intake pipe 56 may be provided by a flexible member such as a hose, for example. In particular, when the intake part 37 moves in the width direction X, it is preferable that the common intake pipe 56 has a flexible member with a sufficient length so as not to interfere with the movement of the intake part 37.

[0050] As shown in FIG. 3, the intake section 37 includes an intake fan 57. The intake fan 57 is connected to an intake pipe 53. Specifically, the intake fan 57 is connected to a common intake pipe 56. The intake fan 57 is driven to intake gas from an intake port 50 via the intake pipe 53. The intake fan 57 is controlled by a control unit 35.

[0051] The intake section 37 includes a switching valve 58. The switching valve 58 is provided at a position where a first intake pipe 54, a second intake pipe 55, and a common intake pipe 56 intersect. The switching valve 58 is movable between a first position P1 and a second position P2 by a driving unit (not shown).

[0052] The first position P1 is a position where the second intake pipe 55 and the common intake pipe 56 are not communicated, and the first intake pipe 54 and the common intake pipe 56 are communicated. The first position P1 is a position where gas is intake from a first intake port 51. The second position P2 is a position where the first intake pipe 54 and the common intake pipe 56 are not communicated, and the second intake pipe 55 and the common intake pipe 56 are communicated. The second position P2 is a position where gas is intake from a second intake port 52.

[0053] Thus, the switching valve 58 is configured to switch between intake of gas from the first intake port 51 and intake of gas from the second intake port 52. The switching valve 58 is controlled by the control unit 35.

[0054] <Configuration of the drying carriage 38> The drying unit 30 may include a drying carriage 38 and a drying carriage support portion 39. That is, the drying device 12 may include the drying carriage 38. The drying carriage 38 corresponds to an example of a carriage. The drying carriage 38 is configured to support the drying section 36 and the intake section 37. That is, the drying section 36 and the intake section 37 are provided on the drying carriage 38. The drying carriage support portion 39 extends along the width direction X. The drying carriage support portion 39 may be composed of one piece or a plurality of pieces. The drying carriage support portion 39 supports the drying carriage 38 so as to be movable along the width direction X. The drying carriage 38 is configured to be movable in the width direction X along the drying carriage support portion 39 by a driving force from a driving source (not shown).

[0055] <Positional relationship in plan view from the vertical direction Z> The air intake port 50 is provided at a position that does not overlap with the drying section 36 in a plan view from the vertical direction Z. Specifically, the first air intake port 51 and the second air intake port 52 are provided at positions that do not overlap with the drying section 36 in a plan view from the vertical direction Z.

[0056] <Drying control process> Next, the drying control process will be described with reference to FIG. 5. The drying control process is a process that is executed by the control unit 35 at a predetermined cycle when there is a drying instruction from the user.

[0057] As shown in FIG. 5, in step S10, the control unit 35 executes a conveyance control process. In this process, the control unit 35 controls the drying conveyance unit 33 to convey the medium 90 in the conveyance direction D.

[0058] In step S11, the control unit 35 executes scanning control processing. In this processing, the control unit 35 controls the drying carriage 38 to move in the width direction X. Specifically, the control unit 35 controls the drying carriage 38 to move in the first width direction X1 so as to straddle the medium 90. Thereafter, the control unit 35 controls the drying carriage 38 to move in the second width direction X2 so as to straddle the medium 90.

[0059] In step S12, the control unit 35 determines whether the drying carriage 38 is being scanned in the second width direction X2. When the control unit 35 determines that the drying carriage 38 is not being scanned in the second width direction X2, the process proceeds to step S14. When the control unit 35 determines that the drying carriage 38 is being scanned in the second width direction X2, the process proceeds to step S13.

[0060] In step S13, the control unit 35 executes first intake control processing. In this processing, the control unit 35 controls the switching valve 58 to intake gas from the first intake port 51 without intake gas from the second intake port 52.

[0061] In step S14, the control unit 35 determines whether the drying carriage 38 is being scanned in the first width direction X1. When the control unit 35 determines that the drying carriage 38 is not being scanned in the first width direction X1, the process proceeds to step S16. When the control unit 35 determines that the drying carriage 38 is being scanned in the first width direction X1, the process proceeds to step S15.

[0062] In step S15, the control unit 35 executes second intake control processing. In this processing, the control unit 35 controls the switching valve 58 to intake gas from the second intake port 52 without intake gas from the first intake port 51.

[0063] In step S16, the control unit 35 executes a drying process. In this process, the control unit 35 controls the high-frequency voltage generator 31 to supply a high-frequency voltage to the drying unit 36. Thereby, the control unit 35 controls the high-frequency voltage generator 31 to drive the drying unit 36.

[0064] In this way, when the control unit 35 moves the drying carriage 38 along the width direction X, among the first air inlet 51 and the second air inlet 52, the control unit 35 controls the intake unit 37 to intake gas from the air inlet located in the direction opposite to the moving direction of the drying carriage 38. Specifically, when the control unit 35 moves the drying carriage 38 along the width direction X, among the first air inlet 51 and the second air inlet 52, the control unit 35 controls the switching valve 58 to intake gas from the air inlet located in the direction opposite to the moving direction of the drying carriage 38.

[0065] <Actions and Effects of the First Embodiment> The actions and effects of the first embodiment will be described. (1-1) The drying unit 36 dries the medium 90 from which the liquid has been discharged by generating electromagnetic waves in response to the application of a high-frequency voltage. The intake unit 37 has an air inlet 50 for intake of the gas evaporated from the medium 90 from which the liquid has been discharged. According to this configuration, when drying the medium 90 from which the liquid has been discharged, the liquid evaporated from the medium 90 is intake from the air inlet 50, so that it is possible to suppress the liquid evaporated from the medium 90 from condensing. Thereby, it is possible to suppress the condensed liquid from falling onto the medium 90. Therefore, the medium 90 can be dried without degrading the recording quality of the medium 90.

[0066] (1-2) Conventionally, when drying a medium by boiling a liquid, if the air near the medium reaches the saturated water vapor pressure and fills the area, the evaporation of the liquid will be suppressed. Therefore, it was necessary to continuously blow unsaturated air onto the surface of the medium. On the other hand, when drying the medium by dielectric heating associated with the generation of electromagnetic waves, even if the air near the medium reaches the saturated water vapor pressure and fills the area, the evaporation of the liquid is not suppressed. Therefore, if air is blown into the area where the medium is being heated, the temperature of the liquid may decrease, and the drying efficiency may decrease.

[0067] Therefore, the air inlet 50 is provided at a position that does not overlap with the drying unit 36 in a plan view from the vertical direction Z. According to this configuration, in a plan view from the vertical direction Z, the area where the drying unit 36 dries the medium 90 and the area where air is inhaled from the air inlet 50 can be configured not to overlap. Thereby, it is possible to suppress the area where the drying unit 36 dries the medium 90 from being cooled by the intake air from the air inlet 50. Therefore, it is possible to suppress a decrease in the drying efficiency of the medium 90 and dry the medium 90 without degrading the recording quality of the medium 90.

[0068] (1-3) The drying unit 36 and the intake unit 37 are provided on the drying carriage 38. According to this configuration, by moving the drying carriage 38 provided with the drying unit 36 and the intake unit 37 in the width direction X, it is possible to improve the drying efficiency of the medium 90 while reducing the number of drying units 36 without increasing the size of the drying unit 36 and the intake unit 37.

[0069] (1-4) The intake port 50 includes a first intake port 51 and a second intake port 52. The first intake port 51 and the second intake port 52 are provided at positions that do not overlap with the drying section 36 in a plan view from the vertical direction Z. The drying section 36 is provided between the first intake port 51 and the second intake port 52 in the width direction X. According to this configuration, the first intake port 51 and the second intake port 52 can be provided on both sides with respect to the moving direction of the drying section 36. Thereby, the liquid evaporated from the medium 90 can be efficiently sucked in the moving direction of the drying section 36. Therefore, the medium 90 can be dried without degrading the recording quality of the medium 90.

[0070] (1-5) When the control unit 35 moves the drying carriage 38 along the width direction X, the intake unit 37 is controlled to intake gas from the intake port located in the direction opposite to the moving direction of the drying carriage 38 among the first intake port 51 and the second intake port 52. According to this configuration, gas can be taken in from the intake port located in the direction opposite to the moving direction of the drying section 36. Thereby, the liquid evaporated from the medium 90 can be efficiently sucked in the direction opposite to the moving direction of the drying section 36. Therefore, the medium 90 can be dried without degrading the recording quality of the medium 90.

[0071] (1-6) The drying section 36 is provided on the surface 90A side of the medium 90. Therefore, the medium 90 can be dried by heating the liquid from the surface 90A side of the medium 90 onto which the liquid has been discharged.

[0072] [Second Embodiment] Next, the second embodiment will be described. In the following description, for the same configurations as those of the embodiments already described, duplicate descriptions will be omitted or simplified, and the configurations different from those of the embodiments already described will be described.

[0073] As shown in FIGS. 6 and 7, in the second embodiment, in the drying device 12, the drying unit 30 may include a plurality of drying sections 36. That is, the drying device 12 may include a plurality of drying sections 36.

[0074] Each of the plurality of drying units 36 is provided on the back surface 90B side of the medium 90 in the vertical direction Z. In the plurality of drying units 36, the first electrode 41, the second electrode 42, and the opposing portion 45 are arranged on the upper Z1 side. In this way, the plurality of drying units 36 dry the medium 90 by heating the medium 90 from the back surface 90B.

[0075] The plurality of drying units 36 are provided so as to be arranged side by side in the width direction X. The plurality of drying units 36 are provided so as to be inclined at a predetermined angle with respect to the depth direction Y, but may be provided so that the depth direction Y is the longitudinal direction.

[0076] The drying support portion 34 is provided on both the upstream side and the downstream side in the conveyance direction D with respect to the plurality of drying units 36. The drying support portion 34 is not provided between the plurality of drying units 36 and the back surface 90B of the medium 90. Such a drying support portion 34 may be made of stainless steel.

[0077] The drying unit 30 includes an intake portion 60. That is, the drying device 12 includes an intake portion 60. The intake portion 60 is provided on the front surface 90A side of the medium 90 in the vertical direction Z. The intake portion 60 is provided on the downstream side in the conveyance direction D.

[0078] The intake portion 60 includes an intake port 61. The intake port 61 is provided on the front surface 90A side of the medium 90 in the vertical direction Z. The intake port 61 opens on the upstream side in the conveyance direction D. The intake port 61 may be provided at a position that does not overlap the drying unit 36 in a plan view from the vertical direction Z. The intake port 61 may be provided on the downstream side in the conveyance direction D from the drying unit 36 in a plan view from the vertical direction Z.

[0079] The intake port 61 is provided at a position spaced upward Z1 from the medium 90 in the vertical direction Z. The intake port 61 is provided at a position spaced upward Z1 from the drying unit 36 in the vertical direction Z. The intake port 61 is provided at a position spaced upward Z1 from the drying unit 36 with the medium 90 interposed therebetween in the vertical direction Z. In the vertical direction Z, the distance between the intake port 61 and the front surface 90A of the medium 90 is longer than the distance between the drying unit 36 and the back surface 90B of the medium 90.

[0080] The intake section 60 includes a first air guiding section 62 and an intake fan 63. The first air guiding section 62 extends along the conveying direction D. The first air guiding section 62 extends in the downstream direction of the conveying direction D from the position where the intake port 61 is provided. The first air guiding section 62 is configured to communicate with the intake port 61. The first air guiding section 62 is a pipe that communicates with the intake port 61. The first air guiding section 62 is a pipe that communicates with the intake fan 63. The first air guiding section 62 may constitute part or all of the intake pipe.

[0081] The drying unit 30 may include a blowing section 65. That is, the drying device 12 may include a blowing section 65. The blowing section 65 is configured to blow gas. The blowing section 65 is provided on the surface 90A side of the medium 90 in the vertical direction Z. The blowing section 65 is provided on the upstream side in the conveying direction D.

[0082] The blowing section 65 includes a blowing port 66. The blowing port 66 is an opening for blowing gas. The blowing port 66 is provided on the surface 90A side of the medium 90 in the vertical direction Z. The blowing port 66 opens on the downstream side in the conveying direction D. The blowing port 66 may be provided at a position that does not overlap with the drying section 36 in a plan view from the vertical direction Z. The blowing port 66 may be provided on the upstream side in the conveying direction D of the drying section 36 in a plan view from the vertical direction Z.

[0083] The blowing port 66 is provided at a position spaced upward by Z1 from the medium 90 in the vertical direction Z. The blowing port 66 is provided at a position spaced upward by Z1 from the drying section 36 in the vertical direction Z. The blowing port 66 is provided at a position spaced upward by Z1 from the drying section 36 with the medium 90 interposed therebetween in the vertical direction Z. In the vertical direction Z, the distance between the blowing port 66 and the surface 90A of the medium 90 is longer than the distance between the drying section 36 and the back surface 90B of the medium 90.

[0084] The air supply unit 65 includes a second air guiding unit 67 and an air supply fan 68. The second air guiding unit 67 extends along the conveyance direction D. The second air guiding unit 67 extends upstream in the conveyance direction D from the position where the air outlet 66 is provided. The second air guiding unit 67 is configured to communicate with the air outlet 66. The second air guiding unit 67 is a pipe that communicates with the air outlet 66. The second air guiding unit 67 is a pipe that communicates with the air supply fan 68. The second air guiding unit 67 may constitute part or all of the air supply pipe.

[0085] <Actions and Effects of the Second Embodiment> The actions and effects of the second embodiment will be described. (2-1) The plurality of drying units 36 are provided so as to be arranged in the width direction X. The air inlet 61 is provided on the downstream side in the conveyance direction D from the plurality of drying units 36. According to this configuration, the liquid evaporated from the medium 90 dried by the plurality of drying units 36 arranged in the width direction X can be sucked in from the air inlet 61. Therefore, it is possible to suppress a decrease in the drying efficiency of the medium 90 and dry the medium 90 without degrading the recording quality of the medium 90.

[0086] (2-2) The air supply unit 65 includes an air outlet 66 that supplies air. The air outlet 66 is provided on the upstream side in the conveyance direction D from the plurality of drying units 36. According to this configuration, air can be supplied from the air outlet 66 to the air inlet 61. Thereby, when drying the medium 90 from which the liquid has been discharged, the intake efficiency of the liquid evaporated from the medium 90 can be improved. Thereby, it is possible to further suppress the condensation of the liquid evaporated from the medium 90. Therefore, it is possible to suppress a decrease in the drying efficiency of the medium 90 and dry the medium 90 without degrading the recording quality of the medium 90.

[0087] (2-3) The air inlet 61 opens on the upstream side in the conveying direction D. The air outlet 66 opens on the downstream side in the conveying direction D. According to this configuration, when drying the medium 90 from which the liquid has been discharged, the intake efficiency of the liquid evaporated from the medium 90 can be improved. Thereby, it is possible to further suppress the condensation of the liquid evaporated from the medium 90. Therefore, it is possible to suppress a decrease in the drying efficiency of the medium 90 and dry the medium 90 without degrading the recording quality of the medium 90.

[0088] (2-4) The first air guiding portion 62 communicates with the air inlet 61 and extends in the downstream direction in the conveying direction D. The second air guiding portion 67 communicates with the air outlet 66 and extends in the upstream direction in the conveying direction D. According to this configuration, it is possible to blow air from the second air guiding portion 67 to the air outlet 66 along the conveying direction D. Also, it is possible to intake air from the air inlet 61 to the first air guiding portion 62 along the conveying direction D. For this reason, when drying the medium 90 from which the liquid has been discharged, the intake efficiency of the liquid evaporated from the medium 90 can be improved. Thereby, it is possible to further suppress the condensation of the liquid evaporated from the medium 90. Therefore, it is possible to suppress a decrease in the drying efficiency of the medium 90 and dry the medium 90 without degrading the recording quality of the medium 90.

[0089] (2-5) The air inlet 61 and the air outlet 66 are provided at positions spaced apart from the medium 90 in the vertical direction Z. According to this configuration, at positions spaced apart from the medium 90, air is blown from the air outlet 66 and air is intaken into the air inlet 61. Thereby, it is possible to suppress the region where the medium 90 is dried by the drying unit 36 from being cooled by the blowing from the air outlet 66 and the intake into the air inlet 61. Therefore, it is possible to suppress a decrease in the drying efficiency of the medium 90 and dry the medium 90 without degrading the recording quality of the medium 90.

[0090] (2-6) The intake port 61 and the air outlet 66 are provided on the surface 90A side of the medium 90 from which the liquid is discharged in the vertical direction Z. The drying unit 36 is provided on the back surface 90B side of the medium 90 in the vertical direction Z. According to this configuration, the liquid evaporated from the surface 90A of the medium 90 can be sucked in from the intake port 61. Therefore, when drying the medium 90 from which the liquid has been discharged, the intake efficiency of the liquid evaporated from the medium 90 can be improved. As a result, the condensation of the liquid evaporated from the medium 90 can be further suppressed. Therefore, it is possible to suppress a decrease in the drying efficiency of the medium 90 and dry the medium 90 without degrading the recording quality of the medium 90.

[0091] Further, since the drying unit 36 is provided on the back surface 90B side of the medium 90, even if the drying unit 36 comes into contact with the medium 90, the liquid discharged onto the medium 90 is less likely to adhere to the drying unit 36. Therefore, the distance between the drying unit 36 and the medium 90 can be shortened. Therefore, it is possible to improve the drying efficiency of the medium 90 and dry the medium 90 without degrading the recording quality of the medium 90.

[0092] [Third Embodiment] Next, the third embodiment will be described. As shown in FIG. 8, in the third embodiment, the drying unit 30 may include an intake unit 70. The intake unit 70 includes an intake port 71, an intake pipe 72, and an intake fan 73. The intake port 71 is provided on the surface 90A side of the medium 90 in the vertical direction Z. The intake port 71 is provided at a position overlapping the drying unit 36 in a plan view from the vertical direction Z. The intake port 71 is provided at a position having a predetermined distance from the surface 90A of the medium 90 in the vertical direction Z.

[0093] <Actions and Effects of the Third Embodiment> The actions and effects of the third embodiment will be described. (3-1) The intake port 71 is provided on the surface 90A side of the medium 90 from which the liquid is discharged in the vertical direction Z. The drying unit 36 is provided on the back surface 90B side of the medium 90 in the vertical direction Z. The intake port 71 is provided at a position overlapping the drying unit 36 in a plan view from the vertical direction Z. According to this configuration, with a simple configuration, it is possible to improve the drying efficiency of the medium 90 without increasing the size of the drying device 12.

[0094] [Modified Example] This embodiment can be implemented with the following modifications. This embodiment and the following modified examples can be implemented in combination with each other within a technically non - conflicting range.

[0095] · In the first embodiment, the drying unit 30 may include a plurality of drying parts 36. The plurality of drying parts 36 may be provided on the drying carriage 38. · In the first embodiment, the drying part 36 may be arranged such that the depth direction Y is the longitudinal direction. In the first embodiment, the drying part 36 may be arranged to be inclined with respect to the width direction X and the depth direction Y.

[0096] · In the first embodiment, the switching valve 58 may include a first switching valve and a second switching valve. The first switching valve is provided in the first intake pipe 54. The first switching valve is a valve for opening and closing the first intake pipe 54. The second switching valve is provided in the second intake pipe 55. The second switching valve is a valve for opening and closing the second intake pipe 55. The control unit 35 may intake air from the first intake port 51 by opening the first switching valve and closing the second switching valve. The control unit 35 may intake air from the second intake port 52 by closing the first switching valve and opening the second switching valve.

[0097] ·In the first embodiment, the intake section 37 may be configured such that the first intake pipe 54 and the second intake pipe 55 do not intersect. In this case, the intake section 37 may include a first intake fan communicating with the first intake pipe 54 and a second intake fan communicating with the second intake pipe 55. The intake section 37 may not include the switching valve 58. The control unit 35 may control either the first intake fan or the second intake fan so as to intake gas from an intake port located in the direction opposite to the moving direction of the drying carriage 38.

[0098] ·In the first embodiment, the drying section 36 may be provided on the back surface 90B side of the medium 90. In this case, the drying device 12 may include a first drying carriage for moving the drying section 36 and a second drying carriage for moving the intake section 37. In the first embodiment, the drying section 36, the intake section 37, and the drying carriage 38 may be provided on the back surface 90B side of the medium 90.

[0099] ·In the first embodiment, the drying section 36 and the intake section 37 may be provided not on the drying carriage 38 but on the recording carriage 25. That is, the drying section 36 and the intake section 37 may be provided on a carriage movable in the width direction X. The recording carriage 25 may be an example of the carriage.

[0100] ·In the second and third embodiments, the plurality of drying sections 36 may be arranged in a plurality of rows in the depth direction Y in addition to the width direction X. In the second and third embodiments, each of the plurality of drying sections 36 may be arranged such that the width direction X is the longitudinal direction. In the second and third embodiments, each of the plurality of drying sections 36 may be arranged such that the depth direction Y is the longitudinal direction.

[0101] · In the second embodiment, the air inlet 61 may be provided at a position overlapping with the drying unit 36 in a plan view from the vertical direction Z. The air outlet 66 may be provided at a position overlapping with the drying unit 36 in a plan view from the vertical direction Z. In this case, the distance between the air outlet 66 and the air inlet 61 in the depth direction Y can be shortened. Thereby, it is possible to suppress the area where the medium 90 is dried by the drying unit 36 from being cooled by the air blown from the air outlet 66 and the air intake to the air inlet 61. Therefore, it is possible to suppress a decrease in the drying efficiency of the medium 90 and dry the medium 90 without degrading the recording quality of the medium 90.

[0102] · In the second embodiment, the intake unit 60 may include another communication member between the first air guiding unit 62 and the intake fan 63. The air blowing unit 65 may include another communication member between the second air guiding unit 67 and the air blowing fan 68. These communication members do not have to extend along the conveyance direction D, and may extend, for example, along the vertical direction Z.

[0103] · In the second embodiment, the first air guiding unit 62 does not have to be linear along the conveyance direction D, and may be provided, for example, in an L shape. The first air guiding unit 62 is preferably configured to include a portion extending toward the downstream side in the conveyance direction D. In the second embodiment, the second air guiding unit 67 does not have to be linear along the conveyance direction D, and may be provided in an L shape. The second air guiding unit 67 is preferably configured to include a portion extending toward the upstream side in the conveyance direction D.

[0104] · In the second embodiment, the air blowing unit 65 may be provided on the downstream side of the drying unit 36 in the conveyance direction D. In this case, the intake unit 60 may be provided on the upstream side of the drying unit 36 in the conveyance direction D.

[0105] · The drying unit 36 may be provided separately from the opposing unit 45. That is, the drying unit 36 does not have to include the opposing unit 45. In this case, it is preferable that the opposing unit 45 is provided between the first electrode 41 and the second electrode and the medium 90.

[0106] ·At least one of the first electrode 41 and the second electrode 42 is not limited to a flat plate shape, and may be, for example, a substantially flat plate shape. The substantially flat plate shape may be, for example, a shape that curves in the thickness direction, which is the direction along the vertical direction Z, or a shape with an extremely large aspect ratio of a rectangular shape and may include a linear shape.

[0107] ·The drying unit 36 may not be provided in the drying device 12, but may be provided in the recording device 11. That is, the recording device 11 may include the drying unit 36. In this case, the drying unit 36 may be provided on the downstream side in the transport direction D of the recording unit 20. Thus, the drying unit 36 may be applied to the recording device 11 instead of the drying device 12.

[0108] ·As the recording device 11, a lateral printer may be adopted. The lateral printer is a printer in which the recording carriage 25 is movable in two directions, the main scanning direction and the sub-scanning direction.

[0109] ·The medium 90 is not limited to a roll body. The medium 90 may be paper, a resin film or sheet, a composite film of resin and metal, a laminate film, a woven fabric, a non-woven fabric, a metal foil, a metal film, a ceramic sheet, clothing, etc.

[0110] ·The liquid can be arbitrarily selected as long as it can be recorded on the medium 90 by adhering to the medium 90. For example, the ink includes those in which particles of a functional material composed of solids such as pigments and metal particles are dissolved, dispersed or mixed in a solvent, and includes various compositions such as aqueous ink, oil-based ink, gel ink, hot melt ink, etc.

[0111] · As used herein, the expression "at least any one" means one or more of the desired options. As an example, the expression "at least any one" as used herein means only one option or both of the two options if the number of options is two. As another example, the expression "at least any one" as used herein means only one option or any combination of two or more options if the number of options is three or more.

[0112] [Appendix] The technical ideas and their effects grasped from the above-described embodiments and modification examples are described below. These technical ideas and their effects can be combined with each other within a technically non-contradictory range.

[0113] (A) The drying device includes a drying unit that dries a medium from which a liquid has been discharged by generating electromagnetic waves in response to the application of a high-frequency voltage, and an intake unit that intakes gas. The drying unit includes a first electrode, a second electrode disposed so as to surround the first electrode in a plan view from a first direction toward the medium, a transmission line having a coil and capable of transmitting a high-frequency voltage, a first conductor that electrically connects the transmission line and the first electrode, and a second conductor that electrically connects the transmission line and the second electrode. The intake unit has an intake port that intakes gas evaporated from the medium from which the liquid has been discharged.

[0114] According to this configuration, when drying the medium from which the liquid has been discharged, the liquid evaporated from the medium is intake from the intake port, so that it is possible to suppress the liquid evaporated from the medium from condensing. Thereby, it is possible to suppress the condensed liquid from falling onto the medium. Therefore, the medium can be dried without degrading the recording quality of the medium.

[0115] (B) In the above drying device, the intake port may be provided at a position that does not overlap the drying unit in a plan view from the first direction. According to this configuration, in a plan view from the first direction, the area for drying the medium by the drying unit and the area for sucking air from the air inlet can be configured not to overlap. Thereby, it is possible to suppress the area for drying the medium by the drying unit from being cooled by the intake air from the air inlet. Therefore, it is possible to suppress a decrease in the drying efficiency of the medium and to dry the medium without degrading the recording quality of the medium.

[0116] (C) The drying device may include a carriage configured to be movable in a second direction intersecting the first direction, and the drying unit and the intake unit may be provided on the carriage. According to this configuration, by moving the carriage provided with the drying unit and the intake unit in the second direction, it is possible to improve the drying efficiency of the medium while reducing the number of drying units without increasing the size of the drying unit and the intake unit.

[0117] (D) In the drying device, the air inlet includes a first air inlet and a second air inlet, the first air inlet and the second air inlet are provided at positions that do not overlap the drying unit in a plan view from the first direction, and the drying unit may be provided between the first air inlet and the second air inlet in the second direction.

[0118] According to this configuration, the first air inlet and the second air inlet can be provided on both sides with respect to the moving direction of the drying unit. Thereby, it is possible to efficiently suck the liquid evaporated from the medium in the moving direction of the drying unit. Therefore, it is possible to dry the medium without degrading the recording quality of the medium.

[0119] (E) The drying device may include a control unit that controls the intake unit and the carriage, and when the control unit moves the carriage along the second direction, the control unit may control the intake unit to suck gas from the air inlet located in the direction opposite to the moving direction of the carriage among the first air inlet and the second air inlet.

[0120] According to this configuration, gas can be sucked in from an air inlet located in the direction opposite to the moving direction of the drying unit. Thereby, the liquid evaporated from the medium in the direction opposite to the moving direction of the drying unit can be efficiently sucked in. Therefore, the medium can be dried without degrading the recording quality of the medium.

[0121] (F) In the drying device, the intake unit has a switching valve for switching whether to suck gas from the first air inlet or from the second air inlet, and when the control unit moves the carriage along the second direction, among the first air inlet and the second air inlet, the switching valve may be controlled to suck gas from the air inlet located in the direction opposite to the moving direction of the carriage.

[0122] According to this configuration, it is possible to switch whether to suck gas from the first air inlet or from the second air inlet by controlling the switching valve. Thereby, the liquid evaporated from the medium in the direction opposite to the moving direction of the drying unit can be efficiently sucked in. Therefore, the medium can be dried without degrading the recording quality of the medium.

[0123] (G) The drying device includes a plurality of the drying units, the plurality of drying units are provided so as to be arranged in a second direction intersecting the first direction, and the air inlet may be provided on the downstream side in the conveyance direction of the medium from the plurality of drying units.

[0124] According to this configuration, the liquid evaporated from the medium dried by the plurality of drying units provided so as to be arranged in the second direction can be sucked in from the air inlet. Therefore, it is possible to suppress a decrease in the drying efficiency of the medium and to dry the medium without degrading the recording quality of the medium.

[0125] (H) The drying device includes a blower unit that blows gas, the blower unit has a blower port for blowing gas, and the blower port may be provided on the upstream side in the conveyance direction of the medium from the plurality of drying units.

[0126] According to this configuration, gas can be blown from the air outlet to the air inlet. Thereby, when drying the medium from which the liquid has been discharged, the intake efficiency of the liquid evaporated from the medium can be improved. Thereby, it is possible to further suppress the condensation of the liquid evaporated from the medium. Therefore, it is possible to suppress a decrease in the drying efficiency of the medium and to dry the medium without degrading the recording quality of the medium.

[0127] (I) In the above drying device, the air inlet may open on the upstream side in the conveyance direction of the medium, and the air outlet may open on the downstream side in the conveyance direction of the medium. According to this configuration, when drying the medium from which the liquid has been discharged, the intake efficiency of the liquid evaporated from the medium can be improved. Thereby, it is possible to further suppress the condensation of the liquid evaporated from the medium. Therefore, it is possible to suppress a decrease in the drying efficiency of the medium and to dry the medium without degrading the recording quality of the medium.

[0128] (J) In the above drying device, the intake part may have a first air guiding part, the blowing part may have a second air guiding part, the first air guiding part may communicate with the air inlet and extend in the downstream direction in the conveyance direction of the medium, and the second air guiding part may communicate with the air outlet and extend in the upstream direction in the conveyance direction of the medium.

[0129] According to this configuration, gas can be blown from the second air guiding part to the air outlet along the conveyance direction of the medium. Also, gas can be taken in from the air inlet to the first air guiding part along the conveyance direction of the medium. For this reason, when drying the medium from which the liquid has been discharged, the intake efficiency of the liquid evaporated from the medium can be improved. Thereby, it is possible to further suppress the condensation of the liquid evaporated from the medium. Therefore, it is possible to suppress a decrease in the drying efficiency of the medium and to dry the medium without degrading the recording quality of the medium.

[0130] (K) In the above drying device, the air inlet and the air outlet may be provided at positions spaced apart from the medium in the first direction. According to this configuration, at a position spaced apart from the medium, gas is blown from the air outlet, and gas is sucked into the air inlet. Thereby, it is possible to suppress a region for drying the medium by the drying unit from being cooled by the blowing from the air outlet and the suction into the air inlet. Therefore, it is possible to suppress a decrease in the drying efficiency of the medium and to dry the medium without degrading the recording quality of the medium.

[0131] (L) In the drying apparatus, the air inlet and the air outlet may be provided on the surface side of the medium from which liquid is discharged in the first direction, and the drying unit may be provided on the back side opposite to the surface in the first direction.

[0132] According to this configuration, it is possible to suck the liquid evaporated from the surface of the medium from the air inlet. Therefore, when drying the medium from which liquid has been discharged, it is possible to improve the suction efficiency of the liquid evaporated from the medium. Thereby, it is possible to further suppress the condensation of the liquid evaporated from the medium. Therefore, it is possible to suppress a decrease in the drying efficiency of the medium and to dry the medium without degrading the recording quality of the medium.

[0133] Further, since the drying unit is provided on the back side, even if the drying unit comes into contact with the medium, it is difficult for the liquid discharged onto the medium to adhere to the drying unit. Therefore, the distance between the drying unit and the medium can be shortened. Therefore, it is possible to improve the drying efficiency of the medium and to dry the medium without degrading the recording quality of the medium.

[0134] (M) In the drying apparatus, the air inlet may be provided on the surface side of the medium from which liquid is discharged in the first direction, the drying unit may be provided on the back side opposite to the surface in the first direction, and the air inlet may be provided at a position overlapping the drying unit in a plan view from the first direction.

[0135] According to this configuration, with a simple configuration, it is possible to improve the drying efficiency of the medium without increasing the size of the drying apparatus. (N) The recording apparatus includes a recording unit that performs recording by discharging a liquid onto a medium, a drying unit that dries the medium on which the liquid has been discharged by the recording unit by generating electromagnetic waves in response to the application of a high-frequency voltage, and an intake unit that intakes gas. The drying unit includes a first electrode, a second electrode disposed so as to surround the first electrode in a plan view from a first direction toward the medium, a first conductor that has a coil and electrically connects the transmission line capable of transmitting a high-frequency voltage and the first electrode, and a second conductor that electrically connects the transmission line and the second electrode. The intake unit has an intake port that intakes the gas evaporated from the medium on which the liquid has been discharged. According to this configuration, the same effect as that of (A) can be achieved.

Explanation of Signs

[0136] D…Conveying direction, P1…First position, P2…Second position, X…Width direction, X1…First width direction, X2…Second width direction, Y…Depth direction, Y1…First depth direction, Y2…Second depth direction, Z…Vertical direction, Z1…Upward, Z2…Downward, 10…Recording system, 11…Recording device, 12…Drying device, 13…Feeding unit, 13A…Feeding roller, 14…Winding unit, 14A…Winding roller, 20…Recording unit, 21…Recording support unit, 22…Recording conveyance unit, 23…Head, 24…Nozzle surface, 25…Recording carriage, 26…Recording carriage support unit, 30…Drying unit, 31…High-frequency voltage generation unit, 32…Transmission line, 33…Drying conveyance unit, 34…Drying support unit, 35…Control unit, 36…Drying part, 37…Intake part, 38…Drying carriage, 39…Drying carriage support unit, 41…First electrode, 41A…First electrode surface, 42…Second electrode, 42A…Second electrode surface, 42B…Opening, 43…First conductor, 43A…Coil, 43B…Conducting wire, 44…Second conductor, 44A…Support column, 44B…Connecting part, 44C…Top plate, 45…Opposing part, 50…Intake port, 51…First intake port, 52…Second intake port, 53…Intake pipe, 54…First intake pipe, 55…Second intake pipe, 56…Common intake pipe, 57…Intake fan, 58…Switching valve, 60…Intake part, 61…Intake port, 62…First air guiding part, 63…Intake fan, 65…Air blowing part, 66…Air blowing port, 67…Second air guiding part, 68…Air blowing fan, 70…Intake part, 71…Intake port, 72…Intake pipe, 73…Intake fan, 90…Medium, 90A…Surface, 90B…Back surface, 91…First roll body, 92…Second roll body.

Claims

1. A drying unit that dries a medium from which a liquid has been discharged by generating electromagnetic waves in response to the application of a high-frequency voltage, An intake unit that intakes gas, Comprising, The drying unit, A first electrode, A second electrode disposed so as to surround the first electrode in a plan view from the first direction toward the medium, A first conductor having a coil and electrically connecting a transmission line capable of transmitting a high-frequency voltage and the first electrode, A second conductor that electrically connects the transmission line and the second electrode, Having, The intake unit has an intake port that intakes gas evaporated from the medium from which the liquid has been discharged, A drying device characterized by this.

2. In the drying device according to Claim 1, The intake port is provided at a position that does not overlap with the drying unit in a plan view from the first direction, A drying device characterized by this.

3. In the drying device according to Claim 1 or Claim 2, Comprising a carriage configured to be movable in a second direction intersecting the first direction, The drying unit and the intake unit are provided on the carriage, A drying device characterized by this.

4. In the drying device according to Claim 3, The intake port includes a first intake port and a second intake port, The first intake port and the second intake port are provided at positions that do not overlap with the drying unit in a plan view from the first direction, The drying unit is provided between the first intake port and the second intake port in the second direction, A drying device characterized by this.

5. In the drying device according to Claim 4, Comprising a control unit that controls the intake unit and the carriage, When the control unit moves the carriage along the second direction, among the first intake port and the second intake port, the control unit controls the intake unit to intake gas from the intake port located in the direction opposite to the moving direction of the carriage, A drying device characterized by this.

6. In the drying device according to Claim 5, The intake unit has a switching valve that switches whether to intake gas from the first intake port or from the second intake port, When the control unit moves the carriage along the second direction, among the first intake port and the second intake port, the control unit controls the switching valve to intake gas from the intake port located in the direction opposite to the moving direction of the carriage, A drying device characterized by this.

7. In the drying device according to Claim 1 or Claim 2, Comprising a plurality of the drying units, The plurality of drying units are provided so as to be arranged in a second direction intersecting the first direction. The air inlet is provided on the downstream side in the conveyance direction of the medium from the plurality of drying units. A drying apparatus characterized by the above.

8. In the drying apparatus according to claim 7, It includes a blower unit that blows air. The blower unit has an air outlet for blowing air. The air outlet is provided on the upstream side in the conveyance direction of the medium from the plurality of drying units. A drying apparatus characterized by the above.

9. In the drying apparatus according to claim 8, The air inlet opens on the upstream side in the conveyance direction of the medium. The air outlet opens on the downstream side in the conveyance direction of the medium. A drying apparatus characterized by the above.

10. In the drying apparatus according to claim 9, The intake unit has a first air guiding unit. The blower unit has a second air guiding unit. The first air guiding unit communicates with the air inlet and extends in the downstream direction in the conveyance direction of the medium. The second air guiding unit communicates with the air outlet and extends in the upstream direction in the conveyance direction of the medium. A drying apparatus characterized by the above.

11. In the drying apparatus according to claim 8, The air inlet and the air outlet are provided at positions spaced apart from the medium in the first direction. A drying apparatus characterized by the above.

12. In the drying apparatus according to claim 11, The air inlet and the air outlet are provided on the surface side of the medium from which the liquid is discharged in the first direction. The drying unit is provided on the back side opposite to the surface in the first direction. A drying apparatus characterized by the above.

13. In the drying apparatus according to claim 1, The air inlet is provided on the surface side of the medium from which the liquid is discharged in the first direction. The drying unit is provided on the back side opposite to the surface in the first direction. The air inlet is provided at a position overlapping the drying unit in a plan view from the first direction. A drying apparatus characterized by the above.

14. A recording unit that performs recording by discharging liquid onto a medium, A drying unit that dries the medium on which the liquid has been discharged by the recording unit by generating electromagnetic waves in response to the application of a high-frequency voltage, An intake unit that intakes gas, Comprising, The drying unit, A first electrode, A second electrode arranged so as to surround the first electrode in a plan view from the first direction toward the medium, A first conductor that has a coil and electrically connects a transmission line capable of transmitting a high-frequency voltage and the first electrode. A second conductor that electrically connects the transmission line and the second electrode; having; The intake unit has an intake port that intakes a gas evaporated from a medium from which liquid has been discharged. A recording apparatus characterized by the above.

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