Drying apparatus and recording apparatus

Abstract

This invention provides a drying apparatus and a recording device capable of drying a medium while maintaining its quality. The drying apparatus includes: a conveying unit for conveying a medium from which liquid has been sprayed; a first heating unit for heating the medium conveyed by the conveying unit; and a second heating unit disposed upstream of the first heating unit in the conveying direction of the medium, also heating the medium conveyed by the conveying unit. The first heating unit heats the medium using infrared radiation or a heating wire. The second heating unit includes: a first electrode; a second electrode arranged such that it surrounds the first electrode when viewed from a plane in a first direction toward the medium; a first conductor having a coil and electrically connecting a transmission line capable of transmitting high-frequency voltage to the first electrode; and a second conductor electrically connecting the transmission line to the second electrode.

Description

Technical Field

[0001] This invention relates to a drying apparatus and a recording apparatus. Background Technology

[0002] For example, Patent Document 1 discloses an image forming apparatus equipped with a drying device for drying a medium after liquid has been ejected. To improve drying efficiency, such a drying apparatus includes multiple alternating current (AC) electric field generating units that generate electromagnetic waves to the ejected liquid medium to dry it. One example of such AC electric field generating units is an electromagnetic wave generating unit that generates electromagnetic waves to the medium by supplying a high-frequency voltage between a first electrode and a second electrode. This enables the drying of the medium after liquid has been ejected.

[0003] However, thermal deformation relative to the medium may occur in such a drying apparatus. Therefore, it is desirable to dry the medium while maintaining its quality.

[0004] Patent Document 1: Japanese Patent Application Publication No. 2019-155811 Summary of the Invention

[0005] A drying apparatus for solving the above-mentioned problems includes: a conveying section for conveying a medium from which liquid has been sprayed; a first heating section for heating the medium conveyed through the conveying section; and a second heating section disposed upstream of the first heating section in the conveying direction of the medium, and for heating the medium conveyed through the conveying section. The first heating section heats the medium by infrared radiation or a heating wire. The second heating section includes: a first electrode; a second electrode arranged such that it surrounds the first electrode when viewed from a plane in a first direction toward the medium; a first conductor having a coil and electrically connecting a transmission line capable of transmitting high-frequency voltage to the first electrode; and a second conductor electrically connecting the transmission line to the second electrode.

[0006] A recording apparatus for solving the above-mentioned problems includes: a recording unit that records by spraying liquid onto a medium; a transport unit that transports the medium onto which liquid has been sprayed through the recording unit; a first heating unit that heats the medium transported through the transport unit; and a second heating unit disposed upstream of the first heating unit in the transport direction of the medium, and that heats the medium transported through the transport unit. The first heating unit heats the medium by infrared radiation or a heating wire. The second heating unit includes: a first electrode; a second electrode arranged such that it surrounds the first electrode when viewed from a plane in a first direction toward the medium; a first conductor having a coil and electrically connecting a transmission line capable of transmitting high-frequency voltage to the first electrode; and a second conductor electrically connecting the transmission line to the second electrode. Attached Figure Description

[0007] Figure 1 This is a schematic diagram illustrating the recording system of the first embodiment.

[0008] Figure 2 This is a schematic diagram illustrating the drying unit of the first embodiment.

[0009] Figure 3 This is a perspective view showing the second heating section of the first embodiment.

[0010] Figure 4 This is a schematic diagram illustrating the drying unit of the first embodiment.

[0011] Figure 5 This is a schematic diagram illustrating the drying unit of the second embodiment.

[0012] Figure 6 This is a schematic diagram illustrating the drying unit of the third embodiment.

[0013] Figure 7 This is a schematic diagram illustrating the drying unit of the fourth embodiment. Detailed Implementation

[0014] First Implementation Method The following describes one embodiment of a recording system including a drying device and a recording device. In this description, the direction intersecting the vertical direction Z is defined as the width direction X, and the direction intersecting both the vertical direction Z and the width direction X is defined as the intersection direction Y. The direction along one side of the width direction X is defined as the first width direction X1, and the direction along the other side of the width direction X is defined as the second width direction X2. The direction along one side of the intersection direction Y is defined as the first intersection direction Y1, and the direction along the other side of the intersection direction Y is defined as the second intersection direction Y2. The upper part of the vertical direction Z is defined as upper Z1, and the lower part of the vertical direction Z is defined as lower Z2. Upper Z1 corresponds to an example of the first direction. Planar views taken from upper Z1 are only represented as planar views.

[0015] Structure of Recording System 10 like Figure 1 As shown, the recording system 10 is a system for recording on a medium 90. Specifically, the recording system 10 is a system for recording on the medium 90 by spraying liquid onto the medium 90. The recording system 10 is also a system for drying the medium 90 after recording, from which liquid has been sprayed. The medium 90 is cloth, but it can also be, for example, paper.

[0016] The recording system 10 includes a recording device 11. The recording device 11 is configured to perform recording on a medium 90. In particular, the recording device 11 performs recording on the medium 90 by spraying liquid onto the medium 90. The recording device 11 may also be an inkjet printer that performs recording by spraying ink, an example of liquid, onto the medium 90.

[0017] Liquids can also be pigment inks. Pigment inks contain pigments, water, and solvents. Solvents may include, for example, glycerin. Glycerin is used to prevent clogging in the nozzle from which the liquid is sprayed. The vaporization of glycerin improves the abrasion resistance of the medium 90 from which the pigment ink is sprayed. Pigment inks can be either colored or colorless.

[0018] The recording system 10 includes a drying device 12. The drying device 12 is configured to dry the recorded medium 90 from which liquid has been ejected by the recording device 11. In particular, the drying device 12 dries the recorded medium 90 by generating electromagnetic waves.

[0019] The recording system 10 includes a feed section 13. The feed section 13 unwinds the medium 90 before recording onto the recording device 11. The feed section 13 includes a feed roller 13A. The feed roller 13A is provided to extend along the width direction X. In the width direction X, the width of the feed roller 13A is longer than the width of the medium 90. The feed roller 13A is configured to rotatably hold a first roll 91. The first roll 91 is the medium 90 before recording that has been folded. The medium 90 may also be a strip. In this way, the feed roller 13A holds the medium 90 to be unwound onto the recording device 11.

[0020] The recording system 10 includes a take-up section 14. The take-up section 14 takes up the recorded medium 90 that has been recorded by the recording device 11. In particular, the take-up section 14 takes up the recorded medium 90 that has been dried by the drying device 12. The take-up section 14 includes a take-up roller 14A. The take-up roller 14A is provided to extend along the width direction X. In the width direction X, the width of the take-up roller 14A is longer than the width of the medium 90. The take-up roller 14A is configured to rotatably hold a second roll 92. The second roll 92 is the recorded medium 90 that has been folded. Thus, the take-up roller 14A takes up the medium 90 that has been recorded by the recording device 11 and dried by the drying device 12.

[0021] Structure of recording device 11 The recording apparatus 11 includes a recording unit 20, a recording support unit 21, and a recording transport unit 22. The recording unit 20 is configured to record images on a medium 90 by spraying liquid onto the medium 90. The recording unit 20 sprays 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 transported by the recording transport unit 22.

[0022] The recording unit 20 includes a head 23. While the head 23 can be a serial head, it can also be a line head. A serial head scans along the width direction X of the medium 90. A line head records simultaneously across the width direction X of the medium 90.

[0023] The head 23 has a nozzle surface 24 for opening a plurality of nozzles (not shown). The nozzle surface 24 faces downward Z2. The nozzle surface 24 faces the surface 90A of the medium 90 being transported by the recording and transport unit 22. The plurality of nozzles are configured to open downward Z2. The plurality of nozzles are configured to eject liquid.

[0024] The recording unit 20 may also include a carriage 25 and a carriage support 26. The carriage 25 is configured to support the head 23. The carriage support 26 extends along the width direction X. The carriage support 26 supports the carriage 25 in such a way that it can move along the width direction X. The carriage 25 can move along the carriage support 26 in the width direction X by a driving force from a drive source (not shown).

[0025] The recording support 21 is configured to support the medium 90 being transported by the recording transport unit 22. The recording support 21 is located Z2 below the recording unit 20. The recording support 21 supports the back surface 90B of the medium 90 being transported by the recording transport unit 22. The recording support 21 is located Z2 below the head 23.

[0026] The recording and conveying unit 22 is configured to convey the medium 90 in the conveying direction D. The conveying direction D is along the intersecting direction Y. The recording and conveying unit 22 may also have multiple rollers. The recording and conveying unit 22 uses multiple rollers to convey the medium 90 in the conveying direction D, but it may also use a conveyor belt driven by multiple rollers to convey the medium 90 in the conveying direction D. The recording and conveying unit 22 can also perform intermittent conveying and stopping of the medium 90.

[0027] Structure of drying device 12 The drying apparatus 12 includes a drying unit 30. The drying unit 30 is configured to dry the recorded medium 90. In other words, the drying apparatus 12 takes the medium 90, which has been recorded by the recording unit 20, as the object to be dried.

[0028] The drying unit 30 is configured to dry the recorded medium 90 by generating electromagnetic waves. Although the drying unit 30 is located above the medium 90 (Z1) and below the medium 90 (Z2), it can also be located above the medium 90 (Z1) or below the medium 90 (Z2).

[0029] The drying apparatus 12 includes a high-frequency voltage generating unit 31. The drying apparatus 12 may also include multiple high-frequency voltage generating units 31. The high-frequency voltage generating units 31 are configured to generate high-frequency voltage. The high-frequency voltage generating units 31 supply high-frequency voltage to the drying unit 30 via a transmission line 32.

[0030] The transmission line 32 is a line connecting the drying unit 30 and the high-frequency voltage generating unit 31. The transmission line 32 is capable of transmitting high-frequency voltage from the high-frequency voltage generating unit 31 to the drying unit 30. In other words, the transmission line 32 is capable of transmitting high-frequency voltage.

[0031] While transmission line 32 can also be a coaxial cable, it is not limited to coaxial cables. Transmission line 32 can also have a first line and a second line. The first line can also be a core wire of transmission line 32. The second line can also be an electromagnetic shielding component that covers the first line.

[0032] The drying apparatus 12 includes a drying conveying section 33. The drying conveying section 33 is configured to convey the medium 90 in the conveying direction D. The drying conveying section 33 is an example of a conveying section. The conveying direction D is along the intersecting direction Y. The drying conveying section 33 may also use multiple rollers to convey the medium 90 in the conveying direction D. The drying conveying section 33 can also perform continuous conveying of the medium 90. Relaxation of the medium 90 can also be achieved between the recording conveying section 22 and the drying conveying section 33.

[0033] The drying apparatus 12 includes a control unit 50. The control unit 50 controls the drying apparatus 12. Specifically, the control unit 50 controls the drying unit 30. The control unit 50 controls the high-frequency voltage generating unit 31. The control unit 50 controls the drying conveying unit 33.

[0034] The control unit 50 may also be composed of one or more processors that execute various processes according to a computer program. The control unit 50 may also be composed of one or more dedicated hardware circuits. The control unit 50 may also be composed of a dedicated integrated circuit that executes at least a portion of the various processes. The control unit 50 may also be composed of a circuit that includes a processor and a combination of hardware circuits. The processor includes a CPU and memories such as RAM and ROM. The memory stores program code or instructions configured to cause the CPU to execute processes. Memory, i.e., computer-readable media, includes all readable media that can be accessed by a general-purpose or special-purpose computer.

[0035] The drying unit 30 includes a first heating section 34 and a second heating section 40. The first heating section 34 heats the medium 90 that has been sprayed with liquid through the recording section 20. The first heating section 34 also heats the medium 90 that is being transported through the drying conveying section 33.

[0036] The first heating element 34 is configured to heat the medium 90 by means of infrared radiation. The first heating element 34 may also be an electric wire heater 34A containing an electric heating wire. The first heating element 34 is heated by heat conduction. The first heating element 34 is located both above Z1 and below Z2 of the medium 90, but is not limited to this.

[0037] The first heating unit 34 heats the medium 90 from both the surface 90A and the back surface 90B, thereby drying the medium 90. Specifically, the first heating unit 34 heats the liquid sprayed onto the medium 90 from both the surface 90A and the back surface 90B.

[0038] The second heating unit 40 heats the medium 90 from which liquid has been ejected via the recording unit 20. The second heating unit 40 also heats the medium 90 conveyed via the drying conveying unit 33. The second heating unit 40 is positioned upstream of the first heating unit 34 in the conveying direction D. In other words, the first heating unit 34 heats the medium 90 that has been dried by the second heating unit 40. The first heating unit 34 and the second heating unit 40 are arranged separately in the conveying direction D.

[0039] The second heating unit 40 is configured to generate electromagnetic waves based on the application of a high-frequency voltage. The second heating unit 40 is an example of an electromagnetic wave generating unit. The second heating unit 40 is located above the medium 90 Z1, but is not limited thereto.

[0040] The second heating unit 40 dries the medium 90 by heating it from its surface 90A. More specifically, the second heating unit 40 heats the liquid sprayed onto the medium 90 from its surface 90A.

[0041] The second heating unit 40 dries the medium 90 by vaporizing the liquid sprayed onto it. In other words, the second heating unit 40 dries the medium 90 regardless of whether the area around the medium 90 is saturated with water vapor. Therefore, the second heating unit 40 does not need to blow dried gas that is not saturated with water vapor around the medium 90.

[0042] The second heating unit 40 generates an alternating electric field by producing electromagnetic waves. The electromagnetic waves generated by the second heating unit 40 are mainly composed of an electric field. Compared with heating units that generate ordinary electromagnetic waves, the second heating unit 40 can minimize the induction of magnetic fields caused by the generated electric field.

[0043] To give a specific example, the second heating element 40 generates electromagnetic waves of 2.4 GHz, but is not limited to this.

[0044] The second heating unit 40 may also generate electromagnetic waves of 3MHz to 300MHz. The second heating unit 40 may also generate electromagnetic waves of 300MHz to 30GHz, and may also generate electromagnetic waves of 10MHz to 20GHz.

[0045] The drying unit 30 includes a first abutment portion 51 and a second abutment portion 52. That is, the drying apparatus 12 includes a first abutment portion 51 and a second abutment portion 52. The first abutment portion 51 is arranged opposite to the surface 90A of the medium 90. The first abutment portion 51 is disposed between the first heating unit 34, located Z1 above the medium 90, and the medium 90. The first abutment portion 51 may also be flat. The first abutment portion 51 can abut against the medium 90 between the first heating unit 34 and the medium 90.

[0046] The second abutment portion 52 is configured to face the back surface 90B of the medium 90. The second abutment portion 52 is disposed between the first heating portion 34, located Z2 below the medium 90, and the medium 90. The second abutment portion 52 is positioned relative to the first abutment portion 51, clamping the medium 90. Thus, the first abutment portion 51 and the second abutment portion 52 are configured to clamp the medium 90. The second abutment portion 52 may also be flat. The second abutment portion 52 can abut against the medium 90 between the first heating portion 34 and the medium 90.

[0047] The first contact portion 51 and the second contact portion 52 are made of a material that transfers heat generated by the first heating portion 34. The first contact portion 51 and the second contact portion 52 may also be made of a material with high electrothermal properties. The first contact portion 51 and the second contact portion 52 may also be made of metal.

[0048] The drying unit 30 includes a third contact portion 53 and a fourth contact portion 54. That is, the drying apparatus 12 includes a third contact portion 53 and a fourth contact portion 54. The third contact portion 53 is arranged opposite to the surface 90A of the medium 90. The third contact portion 53 is disposed between the second heating unit 40 and the medium 90. The third contact portion 53 may also be in the shape of a flat plate. The third contact portion 53 can abut against the medium 90 between the second heating unit 40 and the medium 90. The third contact portion 53 protects the first electrode 41 and the second electrode 42, which will be described later.

[0049] The fourth abutment portion 54 is configured to face the back surface 90B of the medium 90. The fourth abutment portion 54 may also be flat. The fourth abutment portion 54 can abut against the medium 90. The fourth abutment portion 54 can support the medium 90. The fourth abutment portion 54 is configured to sandwich the medium 90 between itself and the third abutment portion 53. Thus, the third abutment portion 53 and the fourth abutment portion 54 are provided to clamp the medium 90.

[0050] The third abutment portion 53 and the fourth abutment portion 54 are made of a material that allows electromagnetic waves generated by the second heating portion 40 to pass through. The third abutment portion 53 and the fourth abutment portion 54 are made of insulating components. The third abutment portion 53 and the fourth abutment portion 54 can also be glass plates. The third abutment portion 53 and the fourth abutment portion 54 can also be ceramics with high transmittance. The third abutment portion 53 and the fourth abutment portion 54 can also be made of resin with a low dielectric loss tangent. The third abutment portion 53 and the fourth abutment portion 54 can also be made of polypropylene. The third abutment portion 53 and the fourth abutment portion 54 can also be made of polyethylene.

[0051] The first contact portion 51 and the third contact portion 53 are arranged separately in the conveying direction D. This allows for the suppression of heat transfer between the first contact portion 51 and the third contact portion 53.

[0052] The second abutment portion 52 and the fourth abutment portion 54 are arranged separately in the conveying direction D. This allows for the suppression of heat transfer between the second abutment portion 52 and the fourth abutment portion 54.

[0053] The drying unit 30 includes a temperature detection unit 55. The temperature detection unit 55 is configured to detect the temperature of the first contact portion 51 and the second contact portion 52. The temperature detection unit 55 may also detect the temperature of at least one of the first contact portion 51 and the second contact portion 52.

[0054] Configuration of the first heating section 34 and the second heating section 40 like Figure 2 As shown, the drying unit 30 may also include a first heating element 34. The drying unit 30 may also include multiple second heating elements 40.

[0055] The plurality of second heating elements 40 are arranged in a manner that runs in the width direction X. The plurality of second heating elements 40 may also be integrally formed in a manner that shares the second electrode 42 described later. The second electrodes 42 in the plurality of second heating elements 40 may also be shared at adjacent positions in the width direction X. The plurality of second heating elements 40 are positioned upstream of the plurality of first heating elements 34 in the transport direction D.

[0056] Structure of the second heating section 40 Here, refer to Figure 3 The structure of the second heating unit 40 will be described in detail below. The following description will use one example of the second heating unit 40.

[0057] like Figure 3 As shown, the second heating unit 40 includes a first electrode 41, a second electrode 42, a first conductor 43, and a second conductor 44. Figure 3The diagram shows the first electrode 41 and the second electrode 42 positioned on the Z1 side above the dielectric 90.

[0058] The first electrode 41 is flat, but it can also be rod-shaped. When viewed in a plane, the width direction X of the first electrode 41 is the longer side. That is, when viewed in a plane, the first electrode 41 is extended in the width direction X. The first electrode 41 can also be rectangular when viewed in a plane.

[0059] The first electrode 41 has a first electrode surface 41A. The first electrode surface 41A is the surface facing downward Z2. That is, the first electrode surface 41A is the surface facing the surface 90A of the medium 90. The first electrode 41 may also be arranged such that the first electrode surface 41A abuts against the third abutting part 53.

[0060] The first electrode 41 has a central portion 41B and two end portions 41C. The central portion 41B is the part located at the center in the width direction X. The two end portions 41C are the parts located at both ends in the width direction X. The central portion 41B and the two end portions 41C are integrated.

[0061] The central portion 41B constitutes the first electrode surface 41A. The central portion 41B is disposed at a position that overlaps with the second electrode 42 in the vertical direction Z. That is, at least a portion of the first electrode 41 is disposed at a position that overlaps with the second electrode 42 in the vertical direction Z.

[0062] Both ends 41C are constructed to be inclined upward relative to the outer side of the width direction X. Both ends 41C are located at a position separated from the third abutment portion 53. That is, both ends 41C are provided to extend upward Z1 in the vertical direction Z away from the medium 90. Both ends 41C may also be bent in a manner that separates from the third abutment portion 53.

[0063] The second electrode 42 is in the shape of a flat plate. The second electrode 42 has a second electrode surface 42A. The second electrode surface 42A is the surface facing downward Z2. That is, the second electrode surface 42A is the surface facing the surface 90A of the medium 90. The second electrode 42 may also be arranged such that the second electrode surface 42A abuts against the third abutting part 53.

[0064] The second electrode 42 has an opening 42B. The opening 42B is rectangular in shape when viewed in a planar view, but it can also be a rounded rectangular shape. The first electrode 41 is located at the opening 42B when viewed in a planar view. The opening 42B surrounds the first electrode 41 when viewed in a planar view. That is, the second electrode 42 is configured to surround the first electrode 41 when viewed in a planar view.

[0065] The first conductor 43 is configured to electrically connect the transmission line 32 to 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 wire 43B. The wire 43B is connected to the transmission line 32.

[0066] The second conductor 44 is configured to electrically connect the transmission line 32 to the second electrode 42. The second conductor 44 may also have a support post 44A. The second conductor 44 may also have multiple supports post 44A. The supports post 44A are electrically connected to the second electrode 42. The supports post 44A extend upwards Z1 from the second electrode 42. The supports post 44A are made of metal.

[0067] The second conductor 44 may also have a top plate 44B. The top plate 44B is electrically connected to the support column 44A. The top plate 44B is located at the upper end of the support column 44A. The top plate 44B may also be integral with the support column 44A. The top plate 44B is made of metal.

[0068] By configuring the second heating section 40 in this way, when a high-frequency voltage is applied to the first electrode 41 and the second electrode 42, electromagnetic waves are generated according to the application of the high-frequency voltage, thereby heating the medium 90.

[0069] This second heating element 40 can transfer a large amount of heat energy to the medium 90 through the generation of electromagnetic waves. The second heating element 40 may also be based on electromagnetic waves instead of heat conduction and may not include heating elements such as heating wires. This allows for the miniaturization of the second heating element 40.

[0070] Furthermore, the minimum separation distance between the first electrode 41 and the second electrode 42 is less than 1 / 10 of the wavelength of the electromagnetic wave output from the second heating unit 40. This allows the electromagnetic waves generated when a high-frequency voltage is applied to be attenuated near the first electrode 41 and the second electrode 42. Consequently, the intensity of the electromagnetic waves reaching distant locations from the first electrode 41 and the second electrode 42 can be reduced. In other words, the electromagnetic waves generated from the second heating unit 40 are very strong near the first electrode 41 and the second electrode 42, but very weak at a distance.

[0071] This second heating element 40, by appropriately controlling the frequency band of the generated electromagnetic waves, can concentrate an alternating electric field in the vicinity of the first electrode 41 and the second electrode 42. In other words, it can suppress the influence on the surrounding environment caused by the generation of electromagnetic waves beyond the vicinity of the first electrode 41 and the second electrode 42. The vicinity of the first electrode 41 and the second electrode 42 can be, for example, a range of 3 mm to 3 cm.

[0072] Drying method implemented by drying device 12 Next, refer to Figure 4 The drying method implemented by the drying device 12 will be described.

[0073] In this embodiment, during the drying of the medium 90, pre-drying and formal drying are performed by the drying apparatus 12. Pre-drying is performed before formal drying. Pre-drying dries the medium 90 primarily by vaporizing the water contained in the liquid sprayed onto the medium 90.

[0074] As a specific example, the case of drying the medium 90 after the pigment ink, which is sprayed out as a liquid, will be described. In this case, pre-drying at approximately 100°C primarily vaporizes the water contained in the pigment ink. Pre-drying also vaporizes the solvent, in addition to water. In this case, it is preferable to rapidly increase the temperature of the pigment ink.

[0075] Formal drying, conducted at approximately 270°C to 300°C, primarily vaporizes the solvents contained in the pigment ink. Formal drying allows for the vaporization of a greater amount of solvent compared to pre-drying. During formal drying, to improve the reliability of glycerol vaporization without causing thermal denaturation of the medium, it is preferable to maintain the temperature of the pigment ink under conditions that prevent excessive rise. Formal drying is preferably performed for a longer period compared to pre-drying.

[0076] The first heating unit 34 heats the gas surrounding the medium 90. By raising the temperature of the gas surrounding the medium 90, the first heating unit 34 vaporizes the liquid sprayed onto the medium 90.

[0077] The second heating unit 40 generates electromagnetic waves. The electromagnetic waves generated by the second heating unit 40 do not heat the gas surrounding the medium 90. Therefore, the electromagnetic waves do not directly heat the medium 90 itself, but rather heat the pigment ink. The second heating unit 40 directly vaporizes the pigment ink sprayed onto the medium 90.

[0078] Thus, although the generation of electromagnetic waves is not the direct cause of thermal deformation relative to the medium 90, the heat from the pigment ink is transferred to the medium 90 through heating. Excessive heat transfer from the pigment ink to the medium 90 may thus cause thermal deformation relative to the medium 90.

[0079] The second heating section 40 can raise the temperature of the liquid faster than the first heating section 34. On the other hand, the temperature adjustment of the second heating section 40 relative to the medium 90 is not as easy as that of the first heating section 34.

[0080] like Figure 4As shown, the second heating unit 40 is positioned upstream of the first heating unit 34 in the conveying direction D. Therefore, when the medium 90 is conveyed in the conveying direction D, it is heated by the second heating unit 40 and then by the first heating unit 34. The second heating unit 40 primarily performs pre-drying, while the first heating unit 34 primarily performs formal drying.

[0081] The control unit 50 may also control the first heating unit 34 based on the detection results obtained by the temperature detection unit 55. The control unit 50 may also control the first heating unit 34 to reduce the output heat when the temperatures of the first contact portion 51 and the second contact portion 52 reach a first threshold value based on the detection results obtained by the temperature detection unit 55. The control unit 50 may also control the first heating unit 34 to stop the output when the temperatures of the first contact portion 51 and the second contact portion 52 reach a first threshold value based on the detection results obtained by the temperature detection unit 55. The first threshold value may also be an upper limit that does not cause damage to the medium 90. The first threshold value may also be approximately 300°C.

[0082] The control unit 50 may also control the first heating unit 34 by increasing the output heat when the temperatures of the first contact part 51 and the second contact part 52 fall below a second threshold, based on the detection results obtained by the temperature detection unit 55. The second threshold is smaller than the first threshold. The second threshold may also be a lower limit value at which formal drying can be carried out. The second threshold may also be approximately 200°C.

[0083] The function and effects of the first implementation method The function and effects of the first embodiment will be explained.

[0084] (1-1) The second heating unit 40 is located upstream of the first heating unit 34 in the conveying direction D. According to this structure, the electromagnetic waves generated from the second heating unit 40 can accelerate the rate at which the temperature of the liquid sprayed onto the medium 90 rises. Furthermore, after the temperature of the liquid sprayed onto the medium 90 has risen, the temperature of the medium 90 after the liquid has been sprayed can be easily adjusted using the heat from the first heating unit 34. This suppresses thermal degradation of the medium 90. Therefore, the medium 90 can be dried while maintaining its quality.

[0085] (1-2) The liquid is a pigment ink containing pigment, water, and solvent. According to this structure, pre-drying by vaporizing water from the liquid sprayed onto the medium 90 can be performed via the second heating unit 40. Therefore, the rate of water vaporization from the liquid sprayed onto the medium 90 can be accelerated by the electromagnetic waves generated from the second heating unit 40. Furthermore, formal drying by vaporizing the solvent from the liquid sprayed onto the medium 90 can be performed via the first heating unit 34. Thus, the temperature of the medium 90 after the liquid is sprayed can be easily adjusted by the heat from the first heating unit 34. Therefore, thermal degradation of the medium 90 can be suppressed. Thus, the medium 90 can be dried while maintaining its quality.

[0086] (1-3) The drying apparatus 12 includes a first contact portion 51 and a second contact portion 52. The first contact portion 51 is disposed between the first heating portion 34 and the medium 90, and the second contact portion 52 is disposed at a position that clamps the medium 90 relative to the first contact portion 51. According to this structure, when the medium 90 is in contact with both the first contact portion 51 and the second contact portion 52, the medium 90 can be dried by heat from the first heating portion 34. In other words, the medium 90 can be dried while being clamped by the first contact portion 51 and the second contact portion 52. This suppresses the shrinkage of the medium 90 that occurs during heating. Therefore, thermal deformation of the medium 90 can be suppressed. Thus, the medium 90 can be dried while maintaining its quality.

[0087] (1-4) The drying apparatus 12 includes a third contact portion 53 and a fourth contact portion 54. The third contact portion 53 is disposed between the second heating unit 40 and the medium 90, and the fourth contact portion 54 is disposed at a position that sandwiches the medium 90 relative to the third contact portion 53. According to this structure, the medium 90 can be dried by electromagnetic waves from the second heating unit 40 while the medium 90 is in contact with the third contact portion 53 and the fourth contact portion 54. When the liquid sprayed onto the medium 90 is vaporized, the vaporized moisture remains near the medium 90. This reduces the difference in heat generation of the liquid caused by the type of medium 90 and the type of liquid. Furthermore, by improving the airtightness between the third contact portion 53 and the fourth contact portion 54 and the medium 90, the medium 90 can be dried in an environment where oxidation of the liquid is unlikely. Unevenness in the distance between the medium 90 and the second heating unit 40 can be suppressed. With heating the medium 90, shrinkage of the medium 90 can be suppressed. Therefore, it is possible to suppress thermal deformation relative to the medium 90. Therefore, it is possible to dry the medium 90 while maintaining its quality.

[0088] (1-5) The first heating section 34 is controlled based on the temperature detection results of the first contact section 51 and the second contact section 52. According to this structure, the first heating section 34 can be controlled based on the temperatures of the first contact section 51 and the second contact section 52. Therefore, after the temperature of the liquid sprayed onto the medium 90 is raised, the temperature of the medium 90 after the liquid has been sprayed can be easily adjusted using the heat from the first heating section 34. This suppresses thermal degradation of the medium 90. Therefore, the medium 90 can be dried while maintaining its quality.

[0089] (1-6) The first heating section 34 and the second heating section 40 are arranged separately in the conveying direction D. According to this structure, the influence between the first heating section 34 and the second heating section 40 can be reduced. As a result, heating achieved by the first heating section 34 and heating achieved by the second heating section 40 can be implemented as intended.

[0090] Second Implementation Method Next, the second embodiment will be described. In the following description, descriptions of structures that are the same as those in the previously described embodiments will be omitted or simplified, and descriptions of structures that are different from those in the previously described embodiments will be provided.

[0091] like Figure 5 As shown, in the second embodiment, on the downstream side of the conveying direction D, the heating area generated by the first heating unit 34 and the heating area generated by the second heating unit 40 may overlap. That is, the heating area generated by the first heating unit 34 and the heating area generated by the second heating unit 40 on the conveying direction D may partially overlap.

[0092] The first heating element 34 is disposed below the medium 90 at Z2. A first contact element 51 is disposed between the first heating element 34 and the medium 90. The first contact element 51 may also be made of a material with higher thermal conductivity compared to the third contact element 53 and the fourth contact element 54. The first contact element 51 may be constructed containing ceramic. The drying unit 30 may also omit the second contact element 52.

[0093] The second heating part 40 extends in the intersecting direction Y to a position where it clamps the medium 90 relative to the first heating part 34. The second heating part 40 extends in the intersecting direction Y to a position where it clamps the medium 90 relative to the first abutting part 51. That is, although the first abutting part 51 is also heated by the first heating part 34, it is also heated by the second heating part 40.

[0094] The third abutment portion 53 extends in the cross direction Y to a position where it clamps the medium 90 relative to the first abutment portion 51. The first abutment portion 51 and the fourth abutment portion 54 are provided in a manner that they are in contact with each other in the transport direction D, but they can also be provided in a manner that they are separated in the transport direction D.

[0095] The function and effects of the second embodiment The function and effects of the second embodiment will be explained.

[0096] (2-1) The heating area generated by the first heating unit 34 partially overlaps with the heating area generated by the second heating unit 40. The first contact portion 51 is heated by the second heating unit 40. According to this structure, by heating from both the first heating unit 34 and the second heating unit 40, the temperature of the medium 90 can be sufficiently raised. Therefore, the drying efficiency of the medium 90 can be improved.

[0097] (2-2) The first contact portion 51 is constructed using ceramic. According to this structure, by using a material with high thermal conductivity in the first contact portion 51, it is easy to maintain the temperature relative to the medium 90 achieved by the first heating portion 34 and the second heating portion 40. Therefore, thermal deformation relative to the medium 90 can be suppressed. Thus, the medium 90 can be dried while maintaining its quality.

[0098] Third Implementation Method Next, the third embodiment will be described.

[0099] like Figure 6 As shown, in the third embodiment, the drying unit 30 may also include a conductor frame 80. Figure 6 In the diagram, the conductor frame 80 is represented by a dashed line.

[0100] The conductor frame 80 can also be disposed inside the frame of the drying device 12. The conductor frame 80 is conductive. The conductor frame 80 is configured to house the first heating unit 34 and the second heating unit 40. The conductor frame 80 can also be configured to house multiple first heating units 34 and multiple second heating units 40. The conductor frame 80 has a cylindrical shape along the conveying path of the medium 90. The conductor frame 80 can also be configured such that the conveying direction D is the longer side.

[0101] The conductor frame 80 includes a discharge port 80A. The discharge port 80A is located in a first intersecting direction Y1 of the conductor frame 80. The discharge port 80A is provided for discharging the medium 90 from the inside of the conductor frame 80 to the outside. The conductor frame 80 also includes a feed inlet 80B. The feed inlet 80B is located in a second intersecting direction Y2 of the conductor frame 80. The feed inlet 80B is provided for conveying the medium 90 from the outside of the conductor frame 80 to the inside.

[0102] The conductor frame 80 can also be electrically connected to the second electrode 42. The conductor frame 80 can also be grounded. Thus, the conductor frame 80 functions in the same way as the second electrode 42. In this way, the second heating unit 40 can also generate electromagnetic waves through the first electrode 41, the second electrode 42, and the conductor frame 80.

[0103] Fourth Implementation Method Next, the fourth embodiment will be described.

[0104] like Figure 7 As shown, in the fourth embodiment, the drying unit 30 may also include multiple first heating units 34. The drying unit 30 may also include two first heating units 34. The first heating unit 34 may also be an infrared heater 34B.

[0105] Multiple first heating elements 34 are arranged in a cross direction Y. That is, multiple first heating elements 34 are provided on the upstream side and the downstream side of the conveying direction D. Multiple first heating elements 34 are arranged at a position Z1 above the medium 90. The drying unit 30 may also omit the first contact part 51 and the second contact part 52. The drying unit 30 may also omit the fourth contact part 54.

[0106] Change Example This embodiment can be modified as follows. This embodiment and the following modifications can be combined with each other to implement them without technical inconsistencies.

[0107] In the first to third embodiments, the first heating unit 34 may also be an infrared heater 34B. In the fourth embodiment, the first heating unit 34 may also be an electric heating wire heater 34A. That is, the first heating unit 34 may also heat the medium 90 using an electric heating wire or infrared radiation.

[0108] In the third embodiment, the second electrode 42 may also be integrated with the conductor frame 80. In the drying apparatus 12, as long as the conductor frame 80 is grounded, the second electrode 42 may not be present, and the conductor frame 80 may also function as the second electrode 42.

[0109] The drying device 12 may also omit the first abutment portion 51. The drying device 12 may also omit the second abutment portion 52. That is, the drying device 12 may omit at least one of the first abutment portion 51 and the second abutment portion 52. Thus, the medium 90 may not be held by the first abutment portion 51 and the second abutment portion 52.

[0110] The drying device 12 may also omit the third abutment portion 53. The drying device 12 may also omit the fourth abutment portion 54. That is, the drying device 12 may omit at least one of the third abutment portion 53 and the fourth abutment portion 54. Thus, the medium 90 may not be held by the third abutment portion 53 and the fourth abutment portion 54.

[0111] The drying apparatus 12 may also include one or more first heating units 34. For example, in the fourth embodiment, the first heating unit 34 disposed upstream in the conveying direction D may output more heat than the first heating unit 34 disposed downstream in the conveying direction D.

[0112] The drying apparatus 12 may also include multiple temperature detection units 55. The drying apparatus 12 may also include a temperature detection unit 55 for detecting the temperature of the first contact portion 51 and a temperature detection unit 55 for detecting the temperature of the second contact portion 52. The control unit 50 may also perform control based on the temperatures of the first contact portion 51 and the second contact portion 52. Thus, the temperature detection units 55 may detect the temperature of at least one of the first contact portion 51 and the second contact portion 52.

[0113] The drying apparatus 12 may also include a temperature detection unit 55 for detecting the temperature of the third contact portion 53 and a temperature detection unit 55 for detecting the temperature of the fourth contact portion 54. The control unit 50 may also perform control based on the temperatures of the third contact portion 53 and the fourth contact portion 54. In this way, the temperature detection unit 55 may also detect the temperature of at least one of the third contact portion 53 and the fourth contact portion 54. The drying apparatus 12 may also not include a temperature detection unit 55.

[0114] The first heating unit 34 may heat the medium 90 from the surface 90A side of the medium 90 instead of from the back side 90B side. The first heating unit 34 may also be disposed above the medium 90 Z1.

[0115] The plurality of second heating elements 40 may also be arranged such that the longer side is in the width direction X. In this case, the first electrode 41 may also be arranged such that it extends along the width direction X. The plurality of second heating elements 40 may also be arranged such that they are inclined relative to both the width direction X and the cross direction Y.

[0116] The multiple second heating elements 40 can be integrally formed by sharing the second electrode 42, but the second electrode 42 may not be shared. The multiple second heating elements 40 can also be separately formed. The drying unit 30 may also include multiple second heating elements 40 arranged in one or more rows in the width direction X. The drying unit 30 may also include multiple second heating elements 40 arranged in one or more rows in the cross direction Y.

[0117] The second heating unit 40 can also heat the medium 90 from the back side 90B side. The second heating unit 40 can also heat the medium 90 from both the surface side 90A and the back side 90B side. The second heating unit 40 can also scan in the width direction X. The second heating unit 40 can also be positioned below the medium 90 at Z2.

[0118] • The first electrode 41 is not limited to a flat plate shape; for example, it may also be a generally flat plate shape. A generally flat plate shape includes, for example, a shape that is curved in the thickness direction along the vertical direction Z, or a linear shape with a very large aspect ratio, such as a rectangle.

[0119] The second electrode 42 is not limited to a flat plate shape; for example, it may also be a generally flat plate shape. A generally flat plate shape includes, for example, a shape that is curved in the thickness direction along the vertical Z direction, or a linear shape with a very large aspect ratio, such as a rectangle.

[0120] • At least one of the first electrode surface 41A and the second electrode surface 42A is not limited to a planar shape, but may also be a generally planar shape. A generally planar shape includes, for example, a shape that is curved in the thickness direction along the vertical direction Z, or a linear shape with a very large aspect ratio, such as a rectangle.

[0121] At least one of the first heating unit 34 and the second heating unit 40 may be provided on the recording device 11 instead of the drying device 12. That is, the recording device 11 may also include the first heating unit 34 and the second heating unit 40. In this case, the first heating unit 34 and the second heating unit 40 only need to be provided downstream of the recording unit 20 in the transport direction D. Thus, the first heating unit 34 and the second heating unit 40 may be applied to the recording device 11 instead of the drying device 12.

[0122] • A side-shift printer can also be used as the recording device 11. A side-shift printer is a printer whose carriage 25 can move in both the main scanning direction and the sub-scanning direction.

[0123] • The medium 90 is not limited to a roll. The medium 90 can also be paper, resin film or sheet, resin and metal composite film, laminated film, fabric, non-woven fabric, metal foil, metal film, ceramic sheet, and clothing, etc.

[0124] The liquid can be selected arbitrarily as long as it can be adhered to the medium 90 for recording. The liquid can also be a dye ink such as a disperse dye ink or a reactive dye ink. For example, the ink may include substances in which particles of functional materials composed of solids such as color materials or metal particles are dissolved, dispersed, or mixed in a solvent, and may include various compositions such as water-based inks, oil-based inks, colloidal inks, and hot-melt inks.

[0125] As used in this specification, the expression "at least one" means one or more of the desired options. As an example, if there are two options, "at least one" as used in this specification means only one option or both of the two options. As another example, if there are three or more options, "at least one" as used in this specification means only one option or any combination of two or more options.

[0126] Postscript The following text describes the technical concepts and their effects as understood from the implementation methods and modifications described above. These technical concepts and their effects can be combined with each other within a technically compatible framework.

[0127] [1] The drying apparatus includes: a conveying section for conveying a medium from which liquid has been sprayed; a first heating section for heating the medium conveyed by the conveying section; and a second heating section disposed upstream of the first heating section in the conveying direction of the medium and for heating the medium conveyed by the conveying section, wherein the first heating section heats the medium by infrared radiation or a heating wire, and the second heating section includes: a first electrode; a second electrode arranged such that it surrounds the first electrode when viewed from a plane in a first direction toward the medium; a first conductor having a coil and electrically connecting a transmission line capable of transmitting high-frequency voltage to the first electrode; and a second conductor electrically connecting the transmission line to the second electrode.

[0128] According to this structure, a first heating unit that heats the medium using infrared rays or an electric heating wire is positioned downstream of the second heating unit that generates electromagnetic waves in the conveying direction. Therefore, the electromagnetic waves generated from the second heating unit accelerate the rate at which the temperature of the liquid sprayed onto the medium rises. Furthermore, after the temperature of the liquid sprayed onto the medium has risen, the heat from the first heating unit allows for easy temperature regulation of the medium from which the liquid has been sprayed. This suppresses thermal degradation of the medium. Thus, the medium can be dried while maintaining its quality.

[0129] [2] In the above-mentioned drying device, it may also be provided with: a first abutting part, which is disposed between the first heating part and the medium and is capable of abutting the medium; and a second abutting part, which is disposed at a position that clamps the medium relative to the first abutting part and is capable of abutting the medium.

[0130] According to this structure, when the medium is in contact with both the first and second abutting portions, heat from the first heating portion can dry the medium. In other words, the medium can be dried while being held between the first and second abutting portions. This suppresses the shrinkage of the medium that occurs during heating. Therefore, thermal deformation of the medium can be suppressed. Thus, the medium can be dried while maintaining its quality.

[0131] [3] In the above-mentioned drying apparatus, it may also be configured to include a temperature detection unit, which detects the temperature of at least one of the first contact part and the second contact part, and the first heating part is controlled based on the detection result obtained by the temperature detection unit.

[0132] According to this structure, the first heating section can be controlled based on the temperature of at least one of the first and second contact sections. Therefore, after the temperature of the liquid sprayed onto the medium is raised, the temperature of the medium onto which the liquid has been sprayed can be easily adjusted using the heat from the first heating section. This suppresses thermal degradation of the medium. Thus, the medium can be dried while maintaining its quality.

[0133] [4] In the above-mentioned drying device, it may also be provided with: a third abutting part, which is disposed between the second heating part and the medium and is capable of abutting the medium; and a fourth abutting part, which is disposed at a position relative to the third abutting part that clamps the medium and is capable of abutting the medium.

[0134] According to this structure, the medium can be dried by electromagnetic waves from the second heating unit while it is in contact with the third and fourth contact portions. When the liquid sprayed onto the medium vaporizes, the vaporized moisture remains near the medium. This reduces the difference in heat generation caused by the type of medium and the type of liquid. Furthermore, by improving the airtightness between the third and fourth contact portions and the medium, the medium can be dried in an environment where oxidation of the liquid is unlikely. Unevenness in the distance between the medium and the second heating unit can be suppressed. Heating the medium suppresses its contraction. Therefore, thermal deformation of the medium can be suppressed. Thus, the medium can be dried while maintaining its quality.

[0135] [5] In the above-mentioned drying device, it may also be configured to have a first abutting part, which is disposed between the first heating part and the medium and is able to abut against the medium. The heating area generated by the first heating part in the medium conveying direction partially overlaps with the heating area generated by the second heating part, and the first abutting part is heated by the second heating part.

[0136] According to this structure, by heating from both the first heating section and the second heating section, the temperature of the medium 90 can be sufficiently raised. Therefore, the drying efficiency of the medium can be improved.

[0137] [6] In the above-described drying apparatus, the first contact portion may also be configured to contain ceramic.

[0138] According to this structure, by using a material with high thermal conductivity in the first contact portion, the temperature of the medium achieved by the first heating portion and the second heating portion can be easily maintained. This suppresses thermal deformation of the medium. Therefore, the medium can be dried while maintaining its quality.

[0139] [7] In the above-described drying apparatus, the first heating section and the second heating section may also be arranged separately in the medium conveying direction.

[0140] According to this structure, the influence between the first heating section and the second heating section can be reduced. Therefore, heating achieved by the first heating section and heating achieved by the second heating section can be implemented as intended.

[0141] [8] In the above-mentioned drying device, the liquid may also be a pigment ink containing pigment, water and solvent.

[0142] According to this structure, pre-drying, which vaporizes water from the liquid sprayed onto the medium, can be performed via the second heating section. The electromagnetic waves generated from the second heating section accelerate the vaporization of water from the liquid sprayed onto the medium. Furthermore, formal drying, which vaporizes the solvent from the liquid sprayed onto the medium, can be performed via the first heating section. Thus, the temperature of the medium after the liquid has been sprayed can be easily adjusted using heat from the first heating section. This suppresses thermal degradation of the medium. Therefore, the medium can be dried while maintaining its quality.

[0143] [9] The recording device includes: a recording unit that records by spraying liquid onto a medium; a conveying unit that conveys the medium onto which liquid has been sprayed through the recording unit; a first heating unit that heats the medium conveyed through the conveying unit; and a second heating unit disposed upstream of the first heating unit in the conveying direction of the medium and that heats the medium conveyed through the conveying unit. The first heating unit heats the medium by infrared radiation or a heating wire. The second heating unit has: a first electrode; a second electrode arranged such that it surrounds the first electrode when viewed from a plane in a first direction toward the medium; a first conductor having a coil and electrically connecting a transmission line capable of transmitting high-frequency voltage to the first electrode; and a second conductor electrically connecting the transmission line to the second electrode. According to this structure, the same effect as [1] can be achieved.

[0144] Symbol Explanation 10…Recording system; 11…Recording device; 12…Drying device; 13…Feeding section; 13A…Feeding roller; 14…Take-up section; 14A…Take-up roller; 20…Recording section; 21…Recording support section; 22…Recording conveyor section; 23…Head; 24…Nozzle surface; 25…Carriage; 26…Carriage support section; 30…Drying unit; 31…High-frequency voltage generating section; 32…Transmission line; 33…Drying conveyor section; 34…First heating section; 34A…Heating wire heater; 34B…Infrared heater; 40…Second heating section; 41…First electrode; 41A…First electrode surface; 41B…Central section; 41C…Both ends; 42…Second electrode; 42A…Second electrode surface; 42B…Opening Part; 43…First conductor; 43A…Coil; 43B…Wire; 44…Second conductor; 44A…Support; 44B…Top plate; 50…Control unit; 51…First contact part; 52…Second contact part; 53…Third contact part; 54…Fourth contact part; 55…Temperature detection unit; 80…Conductor frame; 80A…Outlet; 80B…Inlet; 90…Medium; 90A…Surface; 90B…Back side; 91…First reel; 92…Second reel; D…Conveying direction; X…Width direction; X1…First width direction; X2…Second width direction; Y…Crossing direction; Y1…First crossing direction; Y2…Second crossing direction; Z…Vertical direction; Z1…Above; Z2…Below.

Claims

1. A drying apparatus, characterized in that, have: The conveying unit transports the medium that has been sprayed with liquid. A first heating unit heats the medium being conveyed through the conveying unit; A second heating unit is disposed upstream of the first heating unit in the medium conveying direction, and heats the medium conveyed by the conveying unit. The first heating element heats the medium using infrared rays or an electric heating wire. The second heating section has: First electrode; The second electrode is configured to surround the first electrode when viewed from a plane in a first direction toward the medium; A first conductor having a coil and electrically connecting a transmission line capable of transmitting high-frequency voltage to the first electrode; The second conductor electrically connects the transmission line to the second electrode.

2. The drying apparatus as described in claim 1, characterized in that, have: The first contact portion is disposed between the first heating portion and the medium and is capable of contacting the medium; The second abutment is disposed at a position relative to the first abutment that clamps the medium and is capable of abutting against the medium.

3. The drying apparatus as described in claim 2, characterized in that, The device includes a temperature detection unit that detects the temperature of at least one of the first contact portion and the second contact portion. The first heating element is controlled based on the detection results obtained by the temperature detection element.

4. The drying apparatus as described in claim 3, characterized in that, The third contact portion is disposed between the second heating portion and the medium, and is capable of contacting the medium; The fourth abutment is disposed at a position relative to the third abutment that clamps the medium and is capable of abutting against the medium.

5. The drying apparatus as described in claim 1, characterized in that, It has a first abutting portion, which is disposed between the first heating portion and the medium and is capable of abutting against the medium. The heating area generated by the first heating unit in the direction of medium transport partially overlaps with the heating area generated by the second heating unit. The first contact portion is heated by the second heating portion.

6. The drying apparatus as described in claim 5, characterized in that, The first abutment portion is constructed in a manner that incorporates ceramic.

7. The drying apparatus according to any one of claims 1 to 6, characterized in that, The first heating element and the second heating element are arranged separately in the direction of medium transport.

8. The drying apparatus according to any one of claims 1 to 6, characterized in that, The liquid is a pigment ink containing pigment, water, and solvent.

9. A recording device, characterized in that, have: The recording unit records data by spraying liquid onto a medium. A conveying unit that conveys the medium through which the liquid has been ejected from the recording unit; A first heating unit heats the medium being conveyed through the conveying unit; A second heating unit is disposed upstream of the first heating unit in the medium conveying direction, and heats the medium conveyed by the conveying unit. The first heating element heats the medium using infrared rays or an electric heating wire. The second heating section has: First electrode; The second electrode is configured to surround the first electrode when viewed from a plane in a first direction toward the medium; A first conductor having a coil and electrically connecting a transmission line capable of transmitting high-frequency voltage to the first electrode; The second conductor electrically connects the transmission line to the second electrode.

Images