Drying apparatus, recording device, and control method for drying apparatus

Abstract

This invention provides a technology that can improve the drying efficiency of recording liquids on a medium. [Solution] A drying apparatus comprising a conveying means for conveying a recording medium from which liquid has been discharged, a hot air generating unit, a flow path partitioning unit that partitions a circulation space in which hot air generated by the hot air generating unit circulates in the space opposite to the conveying path of the recording medium, an introduction unit for introducing outside air into the circulation space, and an discharge unit for discharging a portion of the hot air circulating in the circulation space to the outside of the circulation space, wherein the drying apparatus comprises an adjustment means that can adjust the discharge of a portion of the hot air from the opening of the discharge unit, and the adjustment means has a closing member that can close the opening and can adjust the amount of closure.

Description

Technical Field

[0004] ,

[0005] ,

[0001] The present disclosure relates to a recording apparatus including a drying apparatus for drying a recording liquid on a medium.

Background Art

[0002] As a technique for drying a recording liquid on a recording medium such as paper, a technique of blowing warm air onto the recording medium to promote drying of the liquid is known. For example, Patent Document 1 discloses a technique of discharging ink onto a medium and then drying the ink using warm air to fix it on the medium. Patent Document 1 also discloses circulating warm air from the viewpoint of power consumption. By circulating warm air, power saving of a heater for heating air can be achieved.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] However, the conventional technology has the following problems. A part of the warm air blown onto the medium is discharged to the outside air through the exhaust port, and another part is blown onto the medium again through the recirculation port. At this time, the recirculated air preferably has a high temperature and a low humidity because it is used for drying. On the other hand, when there are differences in the amount of ink being driven into the medium in the medium width direction, the exhausted air has a low temperature and high humidity where the amount of ink being driven in is large, and a high temperature and low humidity where the amount of ink being driven in is small. Considering highly efficient drying, it is desirable to discharge the low temperature and high humidity air to the outside air and recirculate the high temperature and low humidity air, but in the conventional technology, the low temperature and high humidity air and the high temperature and low humidity air are uniformly circulated and exhausted.

[0005] One aspect of this disclosure is to provide a technology that can improve the drying efficiency of recording liquids on recording media. [Means for solving the problem]

[0006] One aspect of this disclosure is, A transport means for transporting a recording medium from which liquid has been discharged, A drying region forming means having a hot air generating unit, a flow path partition that defines a circulation space in the space opposite to the transport path of the recording medium through which the hot air generated by the hot air generating unit circulates, an introduction unit for introducing outside air into the circulation space, and an discharge unit for discharging a portion of the hot air circulating in the circulation space to the outside of the circulation space, In a drying apparatus equipped with, An adjustment means capable of adjusting the discharge of a portion of the hot air from the opening of the discharge section, comprising an adjustment means having a closing member capable of closing the opening and being capable of adjusting the amount of closing, This drying apparatus is characterized by the following features. Another aspect of this disclosure is: A transport means for transporting the recording medium from which liquid has been ejected from the recording head, A heating and blowing means comprising a blowing means and a heating means, wherein the heating and blowing means blows air heated by the heating means to the recording medium being conveyed by the conveying means, An air passage for sending the heated air blown from the heating air blowing means to the downstream side in the transport direction of the recording medium back to the heating air blowing means, An adjusting means for adjusting the amount of air blown from the heating and blowing means and entering the air passage, This drying apparatus is characterized by having the following features. Another aspect of this disclosure is: A recording device that records on a recording medium, A dispensing head that dispenses liquid onto a recording medium, The drying apparatus disclosed herein, This recording device is characterized by having the following features: [Effects of the Invention]

[0007] One aspect of the present disclosure can provide a drying device capable of improving the drying efficiency of a recording liquid on a recording medium.

Brief Description of the Drawings

[0008] [Figure 1] It is a schematic diagram of a recording device according to Example 1 of the present disclosure. [Figure 2] It is a perspective view of a drying device according to Example 1 of the present disclosure. [Figure 3] It is an operation explanatory diagram of an adjustment unit. [Figure 4] It is a perspective view showing an operation example of an adjustment unit for each media width. [Figure 5] It is a block diagram of the control circuit of the recording device in FIG. 1. [Figure 6] It is a graph showing the relationship between the set temperature and the aperture ratio. [Figure 7] It is a flowchart showing a processing example of a control unit. [Figure 8] It is a schematic diagram showing another configuration example of a drying device. [Figure 9] It is a diagram showing another adjustment amount determination method of an adjustment unit. [Figure 10] It is a diagram showing another adjustment amount determination method of an adjustment unit. [Figure 11] It is a diagram showing another adjustment amount determination method of an adjustment unit. [Figure 12] It is a diagram showing another adjustment amount determination method of an adjustment unit. D [Figure 13] It is a diagram showing another adjustment amount determination method of an adjustment unit. [Figure 14] It is a flowchart showing another processing example of a control unit. [Figure 15] It is a schematic diagram showing another configuration example and operation of an adjustment unit. [Figure 16] It is a schematic diagram showing another configuration example and operation of an adjustment unit. [Figure 17] It is a schematic diagram showing another configuration example of an adjustment unit. [Figure 18]It is a schematic diagram showing the operation of another configuration example of the adjustment unit. [Figure 19] It is a schematic diagram showing another configuration example of the adjustment unit. [Figure 20] It is a schematic diagram showing the air flow of another configuration example of the adjustment unit. [Figure 21] It is a schematic diagram showing another configuration example of the drying device. [Figure 22] It is a flowchart showing a processing example of the control unit. [Figure 23] It is a table defining the relationship between the type of recording medium and the aperture ratio of the adjustment unit. [Figure 24] It is an explanatory diagram of the opening width (aperture ratio). [Figure 25] It is a schematic diagram for explaining the configuration of the recording apparatus according to one embodiment of the present embodiment. [Figure 26] It is a schematic diagram omitting the flapper of the fixing unit according to Example 10. <00001i1> [Figure 27] It is a cross-sectional view of the duct of the fixing unit according to Example 10. [Figure 28] It is a cross-sectional view of the duct of another form of the fixing unit. [Figure 29] It is a schematic diagram of the fixing unit according to Example 10. [Figure 30] It is a graph showing the relationship between the set temperature and the opening area of the duct inlet (opening of the duct) in the exhaust flow rate control according to Example 10. [Figure 31] It is a schematic diagram of the fixing unit according to Example 11. [Figure 32A] It is a flowchart for explaining the control method according to Example 10. [Figure 32B] It is a flowchart for explaining the control method according to Example 10. [Figure 32C] It is a flowchart for explaining the control method according to Example 11.

Mode for Carrying Out the Invention

[0009] The embodiments for carrying out this invention will be described in detail below with reference to the drawings, based on examples. However, the dimensions, materials, shapes, and relative arrangements of the components described in these embodiments should be appropriately modified depending on the configuration of the device to which the invention is applied and various conditions. In other words, the scope of this invention is not intended to be limited to the following embodiments. Furthermore, although multiple features are described in the embodiments, not all of these features are necessarily essential to the invention, and the multiple features may be combined arbitrarily. In addition, in the attached drawings, the same or similar components are given the same reference numeral, and redundant explanations are omitted.

[0010] (Example 1) <Recording device> Figure 1 is a schematic diagram of a recording device (liquid ejection device) 1 according to Embodiment 1 of the present disclosure. The recording device 1 in this embodiment is an inkjet recording device that records by ejecting ink onto a recording medium. However, the present disclosure is also applicable to other types of recording devices and liquid ejection devices. In the figure, arrows X and Y indicate the intersecting horizontal direction, and arrow Z indicates the vertical direction. In this embodiment, the X and Y directions are orthogonal.

[0011] Furthermore, "recording" includes not only cases where meaningful information such as characters and figures is formed, but also broadly cases where images, patterns, etc. are formed on a recording medium, regardless of whether they are meaningful or not, or where the medium is processed, and does not matter whether or not it is made apparent in a way that humans can perceive visually. Also, the "recording medium" may be, for example, a recording material such as paper, cloth, or plastic film. More specifically, the "recording medium" may be an ink-absorbing medium such as paper, or an ink-non-absorbing medium such as polyvinyl chloride. The liquid to be dispensed (recording liquid) is assumed to be water-based ink, but other types of ink may also be used.

[0012] The recording device 1 includes a transport unit 6 for transporting the recording medium P. The transport unit 6 includes a drive roller 6a that rotates due to the driving force of a motor 6c, and a driven roller 6b that presses against the drive roller 6a. The recording medium P is a sheet medium, and a so-called roll-to-roll method is employed for its supply and discharge, in which it is wound onto different rollers (not shown) before and after recording. However, a cut sheet may be used as the recording medium P.

[0013] The transport unit 6 transports the recording medium P in the Y direction (-Y direction). The drive roller 6a is a roller that extends in the X direction. Downstream from the transport unit 6 in the transport direction of the recording medium P, there is a platen 7 and a discharge head 2 facing the platen 7. The recording medium P is transported between the platen 7 and the discharge head 2.

[0014] The ejection head 2 is a recording head that ejects ink onto the recording medium P on the platen 7. The ejection head 2 is supported by a carriage 3. The carriage 3 reciprocates in the X direction by a drive mechanism 5, guided by a guide 4 that extends in the X direction. The drive mechanism 5 is a belt drive mechanism, for example, equipped with an endless belt that can move freely in the X direction and driven by a motor, and the carriage 3 is fixed to the endless belt.

[0015] As described above, the recording device 1 of this embodiment is a serial type recording device in which the ejection head 2 is mounted on a carriage 3. Recording control for the recording medium P is performed by alternately repeating a transport operation (intermittent transport operation) in which a predetermined amount of recording medium P is transported by a transport unit 6, and a recording operation when the transport unit 6 is stopped transporting. The recording operation is the operation of ejecting ink from the ejection head 2 while moving the carriage 3 on which the ejection head 2 is mounted. The platen 7 may be provided with a suction mechanism to suck up the recording medium P, and the recording medium P may be sucked into the platen 7 during the recording operation to prevent it from floating. Note that the recording device 1 is a full-line type recording device in which there is no carriage 3 and the ejection head 2 extends in the X direction. That's good too.

[0016] Next, a configuration for drying the ink ejected onto the recording medium P and fixing it to the recording medium P will be described. A hot air blower 8 is provided upstream of the ejection head 2 in the transport direction of the recording medium P. The hot air blower 8 comprises a blowing unit 81 that blows air (generates wind), a heating unit 82 that heats the air blown from the blowing unit 81, and an air passage unit 83 that guides the heated air (hot air). The hot air is blown toward the area between the platen 7 and the ejection head 2 (the surface of the recording medium P). This promotes the evaporation of moisture contained in the ink ejected onto the surface of the recording medium P on the platen 7, thereby promoting the drying of the ink and its fixation to the recording medium P. In this embodiment, the blowing unit 81 is an electric fan, and the heating unit 82 is a coil-type electrical-to-thermal conversion element.

[0017] A drying device 10 is provided downstream of the ejection head 2 in the transport direction of the recording medium P. In this embodiment, the drying device 10 uses a transport unit 6 as a transport mechanism (transport means) for the recording medium P, and is also used as a recording mechanism (ejection head 2, carriage 3, etc.). It is positioned opposite the guide unit 9 that guides the transport of the recording medium P. The guide unit 9 guides the recording medium P diagonally downward. The drying device 10 is a fixing device that blows warm air onto the recording medium P, which has been transported onto the guide unit 9 after ink has been ejected from the ejection head 2, to promote the drying of the ink and its fixation to the recording medium P.

[0018] The drying apparatus 10 comprises a hot air blowing unit 11 as a hot air generating unit and a passage forming unit 14 as a flow path partition. The hot air blowing unit 11 comprises a blowing unit 12 that blows air (generates wind) and a heating unit 13 that heats the air blown from the blowing unit 12, and is a mechanism for generating hot air. The passage forming unit 14 partitions an internal space SP, which is a circulating space in which the hot air generated by the blowing unit 12 circulates, in the space opposite the transport path of the recording medium P. In this embodiment, the blowing unit 12 is an electric fan, and the heating unit 13 is a coil-type electric-to-heat conversion element, also called a fixing heater.

[0019] The passage forming unit 14 is a component that forms a circulation passage RT1 (dotted line) for circulating the air blown by the hot air blowing unit 11 between the hot air blowing unit 11 and a region R on the transport path (RT0) of the transport unit 6. Region R is a section of the transport path RT0 defined by the guide unit 9, and is the section facing the bottom of the drying apparatus 10 (the section shown by the dotted line in Figure 1). The passage forming unit 14 includes a chamber 14a that houses the hot air blowing unit 11 and defines an internal space SP, a partition wall 14b formed inside the chamber 14a, a blowing plate 14c, and a cover member 14d. The blowing plate 14c is a porous member with a large number of holes formed therein. The circulation passage RT1 is defined by the chamber 14a, the partition wall 14b, and the surface of the guide unit 9, and the air blown by the blower unit 12 is circulated in the following order: heating unit 13 → blowing plate 14c → surface of guide unit 9 → blower unit 12.

[0020] The circulating flow of hot air in the circulation passage RT1 includes a flow from the upstream side to the downstream side of the transport path of the recording medium P in the internal space SP, and a flow from the downstream side to the upstream side on the side close to the transport path. The blowing plate 14c divides the internal space SP into space SP1 (first space) on the side away from the transport path of the recording medium P and space SP2 (second space) on the side close to the transport path. Spaces SP1 and SP2 are in communication with each other by a plurality of holes formed in the blowing plate 14c. The hot air blowing unit 11 is located in space SP1. Of the hot air blowing unit 11, the blowing unit 12 is located at the upstream end of the transport path in space SP1 and blows air toward the downstream side of the transport path, and the heating unit 13 is located downstream of the blowing unit 12 in space SP1.

[0021] The circulation passage RT1 has an intake section (intake section) RTi into which outside air from outside the circulation passage (outside RT1) is introduced, and an exhaust section (discharge section) RTo into which a portion of the internal air inside the circulation passage (inside RT1) is exhausted. In other words, the chamber 14a, together with the guide unit 9, forms an airtight space (a space where there is no entry or exit of air except for the intake section RTi and the exhaust section RTo) except for the intake section RTi and the exhaust section RTo. The hot air blowing unit 11, the passage forming unit 14, the intake section RTi, and the exhaust section RTo constitute the drying area forming means of this disclosure. The intake section RTi is an opening formed at the upstream end of the circulation passage RT1 in the direction of transport of the recording medium P, and the exhaust section RTo is an opening formed at the downstream end of the circulation passage RT1 in the direction of transport of the recording medium P.

[0022] The hot air blown from the hot air blowing unit 11 is delivered to the recording medium P as it is transported along the transport path RT0 on the guide unit 9 via the blowing plate 14c. By blowing hot air towards the recording medium P, the ink and the recording medium P are heated, the water and solvent contained in the ink evaporate, and the ink is fixed to the recording medium P. A portion of the hot air blown from the hot air blowing unit 11 forms a circulating flow that circulates through the circulation passage RT1. By circulating already heated hot air, it is possible to reduce the power consumption of the heating unit 13.

[0023] The drying apparatus 10 is equipped with temperature sensors 15a and 15b. Temperature sensor 15a is located in the internal space SP, specifically within the circulation passage RT1, in the direction of the circulating flow, downstream of the heating unit 13, and upstream of region R or the blowing plate 14c. Temperature sensor 15a can detect the temperature of the hot air blown onto the recording medium P. Temperature sensor 15b is located outside the circulation passage RT1 (outside the chamber 14a). Temperature sensor 15b can detect the temperature of the outside air surrounding the drying apparatus 10.

[0024] The drying apparatus 10 includes an adjustment unit 16 as an adjustment means that can adjust the discharge of the internal air of the circulation passage RT1 from the opening of the exhaust section RTo. The adjustment unit 16 adjusts the amount of outside air supplied from outside the chamber 14a (outside the circulation passage RT1) to the blower unit 12 (inside the circulation passage RT1). In this embodiment, the adjustment unit 16 adjusts the amount of exhaust that discharges the internal air of the circulation passage RT1 to the outside of the circulation passage RT. The flow rate of internal air exhausted from the exhaust section RTo and the flow rate of outside air flowing in from the inlet section RTi are approximately equal. Increasing the exhaust amount increases the amount of outside air introduced into the circulation passage RT1 and decreases the amount of circulating air. That is, the amount of outside air supplied to the blower unit 12 increases. Conversely, decreasing the exhaust amount decreases the amount of outside air introduced into the circulation passage RT1 and increases the amount of circulating air. That is, the amount of outside air supplied to the blower unit 12 decreases.

[0025] In this way, the ratio of outside air flowing into the blower unit 12 to the internal air inside the blower unit 12 can be adjusted. The temperature of the air flowing into the blower unit 12 will be relatively lower when the proportion of outside air is high, and relatively higher when the proportion of outside air is low. By adjusting the adjustment unit 16, the temperature of the air flowing into the blower unit 12 can be controlled, so that hotter air is blown onto the recording medium P, while preventing the blower unit 12 from being exposed to temperatures higher than its specified temperature. This prevents the blower unit 12 from deteriorating and reduces the lifespan of the drying device 10.

[0026] Here, the detailed configuration of the adjustment unit 16 will be explained using Figures 1 and 2. Figure 2 is a perspective view of the drying apparatus 10. The adjustment unit 16 is divided into multiple sections in the media width direction (X direction), and each section is composed of a plate-shaped flapper (door) that can be controlled individually. In this embodiment, the adjustment unit 16 consists of adjustment unit 161 and adjustment unit 162. Adjustment unit 161 has a movable member 161a as a closing member, and adjustment unit 162 has a movable member 162a as a closing member. The movable members 161a and 162a are configured to individually partially close the opening of the exhaust section RTo, and the amount of closing can be individually adjusted. Specifically, the movable members 161a and 162a are arranged in the width direction of the recording medium P that intersects with the transport path of the recording medium P, and a rotating mechanism extends along the width direction. These are opening and closing members that can rotate around an axis. The movable members 161a and 162a are configured such that the amount of obstruction to the opening of the exhaust section RTo decreases as the angle with respect to the direction along the transport path of the recording medium P decreases (as it approaches parallel to that direction). The opening amount of the opening of the exhaust section RTo changes as the amount of obstruction by the movable members 161a and 162a changes; that is, if the amount of obstruction increases, the opening amount decreases, and if the amount of obstruction decreases, the opening amount increases. The adjustment units 161 and 162 adjust the exhaust volume by changing the opening amount of the exhaust section RTo by the displacement of the movable members 161a and 162a. The movable members 161a and 162a are rotatably mounted around an axis (rotation axis) CT extending in the X direction and rotate by the driving force of actuators (motors in this case) 161c and 162c.

[0027] Here, the drive of the movable members 161a and 162a is not limited to rotation; it may also be linear motion, sliding in the vertical direction. Furthermore, the drive does not need to be electric; it may be operated manually. In this embodiment, the adjustment unit 16 is divided into two sections along its longitudinal center, but the configuration is not limited to this embodiment. For example, the number of divisions may be 10. Even with two divisions, the division may be 1:1 along the center, or the division ratio can be determined from the maximum specification width and the most frequently used media width, such as 1:5.

[0028] If the adjustment unit 16 is not divided and is composed of a single flapper, there are several functional concerns. One is that if the flapper is driven on one side, the opening ratio of the exhaust section in the width direction may unintentionally differ. Because the drive source is only on one side, the flapper on the side without the drive source will flex under its own weight, resulting in a smaller opening ratio than the side with the drive source. If the exhaust volume in the width direction differs unintentionally, there is a concern that some images may not dry properly. Also, if drives are provided on both sides of a single flapper, there is a concern that the flapper will twist unless the drive amounts of the drive sources on both sides are highly synchronized. If the amount of twist exceeds the limit of elastic deformation, or if repeated deformation is applied, permanent deformation will occur in the flapper, which will also affect drying. Dividing the adjustment unit 16 into two or more parts can resolve the above concerns.

[0029] The positions of the movable members 161a and 162a are detected by position detection sensors 161d and 162d. Position detection sensors 161d and 162d are, for example, potentiometers or rotary encoders that detect the amount of rotation of the movable members 161a and 162a, respectively. By controlling actuators 161c and 162c based on the detection results of position detection sensors 161d and 162d, the positions of the movable members 161a and 162a, that is, the opening amounts of the exhaust sections RTo1 and RTo2, can be controlled more accurately. In addition, even if the user has set a high temperature for the hot air, there may be cases where the opening amounts of the exhaust sections RTo1 and RTo2 cannot be controlled to the required opening amount (target opening amount) for the set temperature due to deformation of the flapper, etc. If the position detection sensors 161d and 162d detect that the opening amounts of the exhaust sections RTo1 and RTo2 are low, it is also possible to control the temperature of the hot air (reduce the heat output of the heating unit 13).

[0030] The positions of the movable members 161a and 162a are held by the holding units 161b and 162b. The holding units 161b and 162b are locking mechanisms that prevent the positions of the movable members 161a and 162a from being unnecessarily displaced, and are, for example, torque limiters provided on the shaft CT. When the driving force of actuator 161c or 162c exceeds the specified torque of the torque limiter, the movable members 161a or 162a rotate, respectively. However, even if an external force less than the specified torque is applied to the movable members 161a or 162a, the positions of the movable members 161a and 162a are maintained. The holding units 161b and 162b can continuously maintain the positions of the movable members 161a and 162a, that is, the opening amount of the exhaust section RTo.

[0031] Furthermore, the adjustment unit 16 controls the media width direction (X direction) of the exhaust gas coming out of the exhaust section RTo. It serves as an exhaust distribution adjustment means for adjusting the amount in each region. For example, when it is desired to adjust the exhaust volume in the region of exhaust section RTo1, the adjustment unit 161 can be driven to change the opening amount of exhaust section RTo1. Similarly, when it is desired to adjust the exhaust volume in the region of exhaust section RTo2, the adjustment unit 162 can be driven to change the opening amount of exhaust section RTo2.

[0032] Figures 3(A) and 3(B) are explanatory diagrams of the operation of the adjustment unit 16. Figure 24 is an explanatory diagram of the opening width D1 (opening ratio). As an example of operation explanation, the operation of the adjustment unit 161 will be explained, but the operation of the adjustment unit 162 is similar, so the explanation of the latter will be omitted.

[0033] Figure 3(A) shows the movable member 161a in the fully open state. In this embodiment, the opening width D1 of the exhaust section RTo1 is defined as the distance (shortest distance) between the guide unit 9 or the extension line of the guide unit 9 and the lower end 161e of the movable member 161a. More specifically, as shown in Figure 24, the opening width D1 is the distance in the direction perpendicular to the extension line 9x between the extension line 9x, which is a virtual line (virtual plane) along the guide surface of the guide unit 9 when viewed in the X direction, and the lower end 161e of the movable member 161a. That is, the movable member 161a is considered to be in the fully open state when the opening width D1 is the maximum value D1max set by the control unit 20 (see Figure 5), and in this case, the opening ratio of the exhaust section RTo1 is 100%. For example, when the maximum value Dmax1 = 50 mm, the opening ratio is 100% when the lower end 161e of the movable member 161a is located at an opening width D1 = 50 mm. The maximum aperture width Dmax is set appropriately according to various conditions such as the type of recording medium P and the set temperature.

[0034] Therefore, when the movable member 161a is fully open, the possible positions it can take are not limited to the position where it is approximately parallel to the extension line (9x) of the guide unit 9, as shown in Figure 3(A). For example, even in positions where the lower end portion 161e is located away from the extension line of the guide unit 9, or where the lower end portion 161e is located closer to the extension line of the guide unit 9, the opening will be fully open if the opening width D1 = the maximum opening width D1max. The maximum opening width D1max may be set by the control unit 20 according to a table pre-stored in the control unit 20, or it may be set by the user via the operation panel 31 or external terminal 32.

[0035] Figure 3(B) shows the movable member 161a in the fully closed state (initial state). In this embodiment, the case where the movable member 161a is in the fully closed state and the opening ratio of the exhaust section RTo1 is 20-30% is shown. Similar to the case where the movable member 161a is in the fully open state, the opening ratio of the exhaust section RTo1 when the movable member 161a is in the fully closed state can be appropriately set according to various conditions such as the type of recording medium P and the set temperature, and should be set to a ratio greater than 0% and less than 100%. In order to prevent the lower end portion 161e of the movable member 161a from coming into contact with the recording medium P being transported on the guide unit 9, it is desirable that the opening ratio in the fully closed state is not 0%.

[0036] <Recording Process> Using Figure 4(A), the recording process when the width of the recording medium P used is equal to the maximum specified width of the device will be explained. The drying apparatus 10 has a specified temperature determined by the bearings, grease, electrical circuit boards, etc. used. Therefore, the temperature of the air that circulates inside the drying apparatus 10, mixes with outside air at the introduction RTi, and then flows back inside the drying apparatus 10 must be lower than the specified temperature of the drying apparatus 10.

[0037] If the temperature of the air flowing through the drying apparatus 10 exceeds the fan's specified temperature, the circulation rate needs to be reduced. In the case of the above set temperature, the control unit 20 controls the adjustment unit 16 to widen the opening of the exhaust section RTo (increase the opening ratio). This makes it easier for the hot air to flow out to the outside, and increases the amount of outside air taken in at the inlet section RTi. As a result, the drying apparatus The temperature of the air flowing inside the unit 10 can be lower than the fan's operating temperature.

[0038] Conversely, if the temperature of the air flowing through the drying apparatus 10 does not exceed the fan's specified temperature, the circulation rate can be increased. In the case of the above set temperature, the control unit 20 controls the adjustment unit 16 to narrow the opening of the exhaust section RTo (lower the opening ratio). This makes it more difficult for hot air to flow out to the outside, and reduces the amount of outside air O taken in at the inlet section RTo. As a result, the circulation rate of hot air can be increased, and the power consumption of the heating unit 13 can be reduced. In this case, since the media width and the size of the apparatus used are the same, the adjustment amounts of the adjustment units 161 and 162 are the same.

[0039] Using Figure 4(B), the recording process when the width of the recording medium P used is smaller than the maximum width specified by the device will be explained. When the recording medium P used is a medium (first recording medium) that is smaller (narrower) than the maximum width of the device, the drying apparatus 10 of this embodiment 1 is configured to move the recording medium P to the right edge of the device width. Since the amount of moisture contained in the air passing over the recording medium P on which the image is recorded will be large, drying efficiency is better if as much air as possible is exhausted from that area and the air in the area without the recording medium P is circulated without exhausting as much as possible. Of the adjustment units 161 and 162, adjustment unit 161 is an adjustment unit (first closure member) positioned at a location corresponding to the area (first area) through which the recording medium P passes in the transport path area of ​​the recording medium P which is divided in the width direction. Adjustment unit 162 is an adjustment unit (second closure member) positioned at a location corresponding to the area (second area) through which the recording medium P does not pass in the transport path area of ​​the recording medium P which is divided in the width direction. Therefore, the adjustment unit 162 in the region through which the recording medium P does not pass is closed to reduce the exhaust volume in this region, and the adjustment unit 161 in the region through which the recording medium P passes is opened to increase the exhaust volume in this region. In other words, the amount of occlusion of the opening of the exhaust section RTo by the adjustment unit 162 is made greater than the amount of occlusion by the adjustment unit 161. At this time, the total amount of exhaust discharged from the exhaust section RTo is set to a circulation rate determined by the set temperature as described above. In this embodiment, the recording medium P is positioned towards the right end, but the effects of this disclosure are not limited to this position. For example, the recording medium P may be positioned towards the left end or towards the center. In any case, drying efficiency can be improved by controlling the adjustment unit 16 in the region through which the recording medium P passes to open.

[0040] <Control circuit> Referring to Figure 5, the configuration of the control circuit of the recording device 1 will be described. The recording device 1 includes a control unit 20 that is responsible for its control. The control unit 20 includes a processing unit 21, a storage unit 22, and an input / output interface (I / O) 23. The processing unit 21 consists of one or more processors and controls the recording device 1 by executing a control program stored in the storage unit 22. More specifically, for example, it acquires the detection results of the sensor 33 and controls the drive of the actuator 34, the heating element 35, the discharge head 2, and the drying device 10. The storage unit 22 consists of one or more storage devices and stores the control program and various data. Storage devices include semiconductor memories such as RAM and ROM, and magnetic storage devices such as hard disks. The I / O 23 relays the input and output of signals between the processing unit 21 and external devices.

[0041] The control panel 31 is an input device that accepts user input. The user can input and set the temperature and airflow rate of the hot air in the drying apparatus 10 into the control panel 31. The temperature of the hot air may be set by user input, or the temperature information of the hot air, which is determined according to the type of recording medium P, may be stored in the storage unit 22, and the temperature corresponding to the type of recording medium P being used may be read from the temperature information and set. The external terminal 32 is a host computer such as a personal computer, which transmits images and other data to be recorded on the recording medium P by the recording device 1 to the control unit 20.

[0042] Sensor 33 includes various sensors (such as a position detection sensor for carriage 3 and a rotation amount sensor for drive roller 6a). Actuator 34 includes motor 6c, drive motor for blower unit 81, drive motor for drive mechanism 5, etc. Heating element 35 includes heating element for heating unit 82, etc.

[0043] Furthermore, the sensor 33 includes temperature sensors 15a and 15b and a position detection sensor 16d. Similarly, the actuator 34 includes an actuator (motor) 16c and a drive motor for the blower unit 12. In addition, the heating element 35 includes the heating element for the heating unit 13.

[0044] <Control method for the adjustment unit> An example of controlling the adjustment unit 16 will be explained using Figures 6(A) and 6(B). Figures 6(A) and 6(B) show an example of the relationship between the set temperature T (horizontal axis) of the hot air blown from the hot air blowing unit 11 to the recording medium P and the overall aperture ratio OS of the exhaust section RTo. The position (attitude) of the movable member 16a corresponds to the aperture ratio OS. The adjustment unit 16 is controlled by the control unit 20. When the adjustment units 161 and 162 are controlled individually according to the media width, the aperture ratio OS is the sum of the aperture ratios of the exhaust section RTo1 and the exhaust section RTo1.

[0045] Figure 6(A) shows an example of the relationship when the opening ratio OS of the exhaust section RTo is linearly controlled with respect to the set temperature of the hot air. Up to the low-temperature set temperature T1, the opening ratio OS of the exhaust section RTo is kept constant (initial state), and above the set temperature T1, the opening ratio OS of the exhaust section RTo is gradually increased as the set temperature rises. At the high-temperature set temperature T2, the opening ratio OS of the exhaust section RTo is maximized (100%). The position of the movable member 16a is controlled in this way.

[0046] Figure 6(B) shows an example of controlling the position of the movable member 16a so that the opening ratio OS of the exhaust section RTo changes in steps with respect to the set temperature. Up to the set temperature T1, the opening ratio OS of the exhaust section RTo is kept at its initial state, and as the set temperature rises, the opening ratio OS of the exhaust section RTo is gradually increased. At the set temperature T2, the opening ratio OS of the exhaust section RTo is maximized. The position of the movable member 16a is controlled in this manner.

[0047] In this way, by controlling the overall opening ratio OS of the exhaust section RTo with the adjustment unit 16 according to the set temperature of the hot air, the ratio of the circulating hot air to the outside air can be changed. Furthermore, high-temperature, low-humidity air in areas where ink is not impregnated by the media can be selectively circulated, and low-temperature, high-humidity air can be selectively exhausted. As a result, by appropriately changing the circulation rate of the hot air according to the temperature of the generated hot air, and selectively exhausting low-temperature, high-humidity air from the exhaust section, highly efficient drying becomes possible.

[0048] Figure 7 is a flowchart showing an example of the processing performed by the control unit 20 involved in the control of the drying apparatus 10.

[0049] In S1, the temperature of the hot air blown out from the drying device 10 is set. The user can input and set the temperature of the hot air from the control panel 31. In S2, the media width is set. The user can input and set the media width from the control panel 31, or a detection means that automatically detects the set media width may be provided and the detection result may be referred to. In S3, the control unit 20 determines whether the temperature of the hot air set in S1 exceeds temperature T1. If the set temperature exceeds temperature T1, proceed to S5; otherwise, proceed to S4. In S4, the control unit 20 sets the positions of the movable members 161a and 162a to their initial state. In S5, the control unit 20 displaces the positions of the movable members 161a and 162a according to the set temperature and media width. For example, if the media width is smaller than the adjustment unit 161, the adjustment unit 1 Closing 62 completely improves drying efficiency. In S6, the control unit 20 starts blowing hot air using the hot air blowing unit 11. Here, it drives the blowing unit 12 and supplies power to the heating unit 13 according to the set temperature to generate heat. Based on the difference between the temperature sensor 15a's detection result and the set temperature, the control unit 20 controls the airflow of the blowing unit 12 (motor rotation speed) and the amount of heat generated by the heating unit 13 (power supplied) to maintain the hot air at the set temperature. In S7, the control unit 20 determines whether the execution of the recording job sent to the recording device 1 has finished. If it has not finished, it continues blowing hot air which was started in S6. If the execution of the recording job has finished, it proceeds to S8. In S8, the control unit 20 executes the process of stopping the drying device 10. Here, first, the heating unit 13 is turned OFF, and the blowing unit 12 is also turned OFF. The positions of the movable members 161a and 162b are also returned to their initial state. In the S8 process, if the execution of the next recording job is scheduled, the hot air supply may not be completely stopped, but the power supplied to the heating unit 13 may be reduced, and the airflow rate of the blowing unit 12 may be reduced with a delay, allowing the system to wait for the execution of the recording job.

[0050] As described above, according to this embodiment, the ratio of outside air and hot air supplied to the blower unit 12 can be changed by controlling the adjustment unit 16 according to the set temperature, detected temperature, and media width. This makes it possible to selectively exhaust low-temperature, high-humidity air and circulate high-temperature, low-humidity air while ensuring that the blower unit 12 does not exceed its specified temperature. In other words, highly efficient drying is possible by expelling low-temperature, high-humidity air to the outside air and selectively recirculating high-temperature, low-humidity air. Furthermore, it is possible to prevent deterioration of the blower unit 12, reduce power consumption, and improve drying efficiency at the same time.

[0051] Furthermore, the temperature of the air circulating within the blower unit 12, that is, the adjustment of the ratio of outside air flowing into the blower unit 12 to the internal air inside the blower unit 12, may also be controlled by controlling the flow rate of outside air flowing in from the inlet RTi. In other words, an adjustment unit similar to the adjustment unit 16 in the exhaust unit RTo may be provided in the inlet RTi, and the ratio of outside air to internal air may be adjusted by controlling both adjustment units.

[0052] Furthermore, although this embodiment shows a configuration in which the air inlet is located on the upstream side of the transport path and the discharge section is located on the downstream side, the arrangement of each part is not limited to the configuration of this embodiment.

[0053] (Example 2) The drying apparatus 10 of the recording device 1 according to Example 2 will be described using Figures 8 and 9. Figure 8 is a schematic diagram of the drying apparatus 10 according to Example 2, and Figure 9 is a schematic top view of the drying apparatus 10 according to Example 2. Here, in Example 2, components common to Example 1 are denoted by the same reference numerals as in Example 1, and the differences from Example 1 will be mainly described. Matters in Example 2 that are not specifically described here are the same as in Example 1.

[0054] The drying apparatus 10, like in Embodiment 1, includes an adjustment unit 16 and a control unit 20. In Embodiment 2, the adjustment unit 16 is configured to be divided into 10 longitudinal sections. In Embodiment 2, a temperature detection means (temperature sensor) 15 for detecting temperature is placed near each of the divided flappers in the adjustment unit 16 or within the circulation passage RT. As shown in Figure 9, temperature detection means 151 to 1510 are provided corresponding to each of the adjustment units 161 to 1610. That is, the drying apparatus 10 is capable of detecting the temperature in each of the multiple regions of the transport path of the recording medium P, which is divided in the width direction corresponding to the adjustment units 161 to 1610, using the temperature detection means 151 to 1510.

[0055] In Example 2, the control amount for controlling each flapper of the adjustment unit 16 is calculated from these temperature sensing means 151 to 1510. The calculation method is described below. As mentioned above, the adjustment unit 16 exhausts as much air with a high moisture content as possible and exhausts as much air with a low moisture content as possible. The air is circulated. With the temperature sensing means 15, the exhaust volume can be adjusted based on the temperature of the air, which changes depending on the amount of moisture. Also, since the overall circulation rate is determined according to the aforementioned set temperature, the warm air blown onto the recording medium P from the multiple jet holes of the outlet plate 14c in the circulation passage RT1 is divided into circulating air and exhausted air at the interface 50 in the internal space SP.

[0056] The boundary surface 50 is formed in a different location depending on the shape of the internal space SP and the configuration of the device, such as the arrangement of the blower unit 12 and the heating unit 13. However, it is generally formed around the region where the direction of the hot air flow reverses from the direction along the media transport direction to the opposite direction.

[0057] In the configuration of Example 2, the air upstream of the interface 50 is recirculated, and the air downstream is exhausted. Therefore, the region in which the exhaust volume is adjusted by the adjustment unit 16 is the air downstream of the interface 50. When controlling the opening and closing amount of each flapper of the adjustment unit 16, the setting is determined by referring to the temperature detected by the temperature sensing means 15 of the air downstream of the interface 50.

[0058] For example, as shown in Figure 9, if the temperature detection result (detected temperature) of the temperature detection means 15 at this point during the printing and transport of an arbitrary image 51 is high for temperature detection means 1510 and low for temperature detection means 151 (sloping downwards to the right), the adjustment unit 16 is controlled as follows: The area (opening ratio) of the exhaust section RTo (exhaust port) closed by the adjustment unit 16 is controlled to increase sequentially from adjustment unit 1610 to 161. In other words, adjustment units 161 to 1610 lower (increase) the opening ratio (amount of closure) of the opening of their respective exhaust section RTo as the detected temperature in the corresponding region increases. Then, the adjustment unit 16 is controlled in response to temperature changes during printing and transport.

[0059] In this embodiment, temperature detection means 151 to 1510 are provided corresponding to each of the adjustment units 161 to 1610, but the configuration is not limited to this. For example, the adjustment unit 16 may be divided into two groups, adjustment units 161 to 165 and adjustment units 166 to 1610, and each group may be controlled by one temperature detection means (i.e., two temperature detection means). In other words, the combination of adjustment unit 16 and temperature detection means 15 is not limited to one-to-one.

[0060] (Example 3) Using Figure 10, the drying apparatus 10 of the recording device 1 according to Example 3 will be described. Here, in Example 3, components common to Examples 1 and 2 are denoted by the same reference numerals as in Examples 1 and 2, and the differences from Examples 1 and 2 will be mainly described. Matters in Example 3 that are not specifically described here are the same as in Examples 1 and 2.

[0061] The drying apparatus 10, like in Embodiment 1, includes an adjustment unit 16 and a control unit 20. In Embodiment 3, humidity detection means (humidity sensors) 40 are provided near each flapper divided in the adjustment unit 16 or within the circulation passage RT1 to detect humidity. As shown in Figure 10, humidity detection means 401 to 4010 are provided corresponding to each of the adjustment units 161 to 1610. That is, the drying apparatus 10 is capable of detecting humidity in each of the multiple regions of the transport path of the recording medium P, which is divided in the width direction corresponding to the adjustment units 161 to 1610, using the humidity detection means 401 to 4010.

[0062] In Example 3, the control amount for controlling each flapper of the adjustment unit 16 is calculated from these humidity detection means 401 to 4010. The calculation method is described below. As mentioned above, the adjustment unit 16 exhausts as much air with a high moisture content as possible and circulates air with a low moisture content. If there is a humidity detection means 40, the exhaust amount is calculated from the humidity of the air which changes depending on the moisture content. The amount can be adjusted. Also, since the overall circulation rate is determined according to the set temperature as described above, the warm air blown onto the recording medium P from the multiple jet holes of the outlet plate 14c in the circulation passage RT1 is divided into circulating air and exhausted air at the interface 50 in the internal space SP. In the configuration of Embodiment 3, the air upstream of the interface 50 is recirculated, and the air downstream is exhausted. Therefore, the region in which the exhaust amount is adjusted by the adjustment unit 16 is the air downstream of the interface 50. When controlling the opening and closing amount of each flapper of the adjustment unit 16, it is determined by referring to the humidity detected by the humidity detection means 40 of the air downstream of the interface 50.

[0063] For example, as shown in Figure 10, if the humidity detection result (detected humidity) of the humidity detection means 40 at this point during the printing and transport of an arbitrary image 51 is low for humidity detection means 4010 and high for humidity detection means 401 (a sloping upward trend), the adjustment unit 16 is controlled as follows: The area (opening ratio) of the exhaust section RTo (exhaust port) closed by the adjustment unit 16 is controlled to increase sequentially (higher) as you move from adjustment unit 1610 to 161. In other words, adjustment units 161 to 1610 increase (decrease) the opening ratio (amount of occlusion) of the opening of their respective exhaust section RTo as the detected humidity in the corresponding region increases. Then, the adjustment unit 16 is controlled in response to temperature changes during printing and transport.

[0064] In this embodiment, humidity detection means 40 are provided corresponding to each of the adjustment units 161 to 1610, but the configuration is not limited to this. For example, the adjustment unit 16 may be divided into two groups, adjustment units 161 to 165 and adjustment units 166 to 1610, and each group may be controlled by one temperature detection means (i.e., two humidity detection means). In other words, the combination of adjustment unit 16 and humidity detection means 40 is not limited to one-to-one.

[0065] (Example 4) The drying apparatus 10 of the recording apparatus 1 according to Example 4 will be described using Figure 11. Figure 11 is a schematic top view of the recording apparatus according to Example 4. Here, in Example 4, components common to Examples 1 to 3 are denoted by the same reference numerals as in Examples 1 to 3, and the differences from Examples 1 to 3 will be mainly described. Matters in Example 4 that are not specifically described here are the same as in Examples 1 to 3.

[0066] The drying apparatus 10, like in Example 1, has an adjustment unit 16 and a control unit 20. In Example 4, a pair of blower units 12 and heating units 13 are provided on the upstream side in the conveying direction of each flapper divided in the adjustment unit 16. As shown in Figure 11, corresponding to each of the adjustment units 161 to 164, blower unit 12 / heating unit 13 combinations, from blower unit 121 / heating unit 131 to blower unit 124 / heating unit 134, are arranged separated by partition walls 411 to 413.

[0067] In Example 4, the control amount for controlling each flapper of the adjustment unit 16 is calculated from the set temperature of the hot air generated by these heating units 131 to 134. The calculation method is described below. As mentioned above, the adjustment unit 16 exhausts as much air with a high moisture content as possible and circulates air with a low moisture content. Also, since the overall circulation rate is determined according to the set temperature mentioned above, the hot air blown onto the recording medium P from the multiple jet holes of the discharge plate 14c in the circulation passage RT1 is divided into circulating air and exhausted air at the interface 50 in the internal space SP. In the configuration of Example 4, the air upstream of the interface 50 is recirculated, and the air downstream is exhausted. Therefore, the region in which the exhaust amount is adjusted by the adjustment unit 16 is the air downstream of the interface 50.

[0068] When controlling the opening and closing amount of each flapper of the adjustment unit 16, the amount of ink injected downstream of the boundary surface 50 of the distribution area in image 51 (ink discharge amount per unit area) is used for each heating unit The setting temperature of the hot air generated by unit 13 is used to determine the setting temperature. The recording medium P shown in Figure 11 is a recording medium (second recording medium) on which an image 51 has been recorded, which has a distribution region in which the amount of ink ejected per unit area changes in the width direction. The adjustment units 161 to 164 increase (decrease) the opening ratio (closing amount) of the opening of their respective exhaust section RTo as the amount of ink ejected per unit area in the corresponding region increases. For example, as shown in Figure 11, the adjustment unit 162 calculates the amount of ink injected into the ink injection reference region 52 enclosed by a rectangle from the recorded image data. Then, the area (opening ratio) of the exhaust section RTo (exhaust port) closed by the adjustment unit 162 is increased (increased) in proportion to the value of the hot air setting temperature of the heating unit 13. For example, the amount of ink ejected per unit area (second ejection amount) in the region corresponding to the adjustment unit 163 (second closing member) is less than the amount of ink ejected per unit area (first ejection amount) in the region corresponding to the adjustment unit 162 (first closing member). Therefore, the amount of blockage by the adjustment unit 163 relative to the opening of the exhaust section RTo is smaller than the amount of blockage by the adjustment unit 162.

[0069] In this example, each of the adjustment units 161 to 164 is provided with a combination of a blower unit 12 / heating unit 13, specifically blower unit 121 / heating unit 131 to blower unit 124 / heating unit 134, but the configuration is not limited to this. For example, the adjustment unit 16 may be divided into two groups, adjustment units 161 to 162 and adjustment units 163 to 164, with each group controlled by one blower unit 12 / heating unit 13. In other words, the two groups of adjustment units may be controlled by two blower units 12 / heating units 13, and the combination of adjustment unit 16 and blower unit 12 / heating unit 13 is not limited to a one-to-one relationship.

[0070] (Example 5) The drying apparatus 10 of the recording apparatus 1 according to Example 5 will be described using Figure 12. Figure 12 is a schematic top view of the recording apparatus according to Example 5. Here, in Example 5, components common to Examples 1 to 4 are denoted by the same reference numerals as in Examples 1 to 4, and the differences from Examples 1 to 4 will be mainly described. Matters in Example 5 that are not specifically described here are the same as in Examples 1 to 4.

[0071] The drying apparatus of Example 5 is equipped with an adjustment unit 16, similar to Example 1. In Example 5, the adjustment unit 16 is divided into 10 sections, and the control amount for controlling each flapper of the adjustment unit 16 is calculated from the distribution of the imprinted ink on the media. The calculation method is described below. As mentioned above, the adjustment unit 16 exhausts as much low-temperature, high-humidity air as possible and circulates high-temperature, low-humidity air. The overall circulation rate is determined according to the set temperature mentioned above. The warm air blown onto the recording medium P from multiple jet holes provided on the outlet plate 14c of the passage forming unit 14 is divided in the internal space SP into circulating air and exhausted air, with the interface 50 as the boundary. Similar to Example 1, in this embodiment as well, the air upstream of the interface 50 is recirculated, and the air downstream is exhausted. Therefore, the region in which the exhaust amount is adjusted by the adjustment unit 16 is the air downstream of the interface 50. When controlling the opening and closing amount of each flapper in the adjustment unit 16, the amount of ink injected downstream of the interface 50 in the distribution area of ​​image 51 is used to determine the amount of ink injected.

[0072] For example, as shown in Figure 12, the adjustment unit 165 calculates the amount of ink injected (ejection amount per unit area) contained in the ink injection reference area 52 enclosed by a rectangle from the recorded image data. Then, the adjustment unit 165 increases the area (opening ratio) of the exhaust section RTo (exhaust port) in proportion to this value.

[0073] Using Figure 13, the recording process when the distribution area of ​​the image 51 recorded on the recording medium P is concentrated in a part of the medium is explained. The air passing through the distribution area of ​​the image 51 contains Since the moisture content increases, drying efficiency is better if as much air as possible is exhausted from this region and the air from regions other than the distribution region in image 51 is circulated rather than exhausted. Therefore, adjustment units 166, 167, 168, 169, and 1610, which are located in the same position in the media width direction as the region other than the distribution region in image 51, are closed to reduce the amount of exhaust in this region (lower the opening ratio). On the other hand, adjustment units 161, 162, 163, 164, and 165, which are located in the same position in the media width direction as the distribution region in image 51, are opened to increase the amount of exhaust in this region (higher the opening ratio). At this time, the total amount of exhaust exhausted from the exhaust section RTo (exhaust port) should be set to a circulation ratio determined by the set temperature as described above.

[0074] Figure 14 is a flowchart showing an example of the processing performed by the control unit 20 involved in the control of the drying apparatus 10. Steps S1 to S8 are the same as in Figure 7.

[0075] In S1, the temperature of the hot air blown out from the drying device 10 is set. The user can input and set the temperature of the hot air from the control panel 31. In S2, the media width is set. The user can input and set the media width from the control panel 31, or a detection means that automatically detects the set media width may be provided, and the detection result may be referred to. In S3, the control unit 20 determines whether the temperature of the hot air set in S1 exceeds temperature T1. If the set temperature exceeds temperature T1, the process proceeds to S5; otherwise, the process proceeds to S4. In S4, the control unit 20 resets the positions of each movable member of the adjustment units 161 to 1610 to their initial state. In S51, the control unit 20 analyzes the ink distribution from the image data recorded on the media, specifically from the image of the media drying in the chamber. Specifically, the control amount of each flapper of the adjustment unit 16 is determined from the media width detected in S2, the set temperature, and the ink distribution. Here, the overall opening ratio of the adjustment unit 16 is set to the circulation rate determined by the set temperature. In S52, the control unit 20 displaces the position of each flapper in the divided adjustment unit 16 according to the control amount determined in S51. In S6, the control unit 20 starts blowing hot air using the hot air blowing unit 11. Here, it drives the blowing unit 12 and supplies power to the heating unit 13 according to the set temperature to generate heat. Based on the difference between the detection result of the temperature sensor 15a and the set temperature, the control unit 20 controls the airflow of the blowing unit 12 (motor rotation speed) and the amount of heat generated by the heating unit 13 (power supplied) to maintain the hot air at the set temperature. In S7, the control unit 20 determines whether the execution of the recording job sent to the recording device 1 has finished. If it has not finished, it continues blowing hot air which was started in S6. If the execution of the recording job has finished, it proceeds to S9. In S8, the control unit 20 executes the process of stopping the drying device 10. Here, first, the heating unit 13 is turned OFF, and the blowing unit 12 is also turned OFF. The positions of each movable member of the adjustment units 161 to 1610 are also returned to their initial state. In the process of S8, if the execution of the next recording job is scheduled, the hot air supply may not be completely stopped, but the power supplied to the heating unit 13 may be reduced, and the airflow rate of the blowing unit 12 may be reduced with a delay, in order to wait for the execution of the recording job.

[0076] As described above, according to this embodiment, the ratio of outside air and hot air supplied to the blower unit 12 can be changed by controlling the adjustment unit 16 according to the set temperature, detected temperature, media width, and ink printing distribution of the recorded image data. This makes it possible to selectively exhaust low-temperature, high-humidity air and circulate high-temperature, low-humidity air while ensuring that the blower unit 12 does not exceed its specified temperature. Furthermore, it is possible to prevent deterioration of the blower unit 12, reduce power consumption, and improve drying efficiency at the same time.

[0077] (Example 6) Embodiment 6 of this disclosure will be described using Figures 15(A) to 16(B). In this embodiment, the adjustment unit 16 is composed of louvers. Here, in Embodiment 6, components common to Embodiments 1 to 5 are denoted by the same reference numerals as in Embodiments 1 to 5, and the differences from Embodiments 1 to 5 will be mainly described. In Embodiment 6, matters not specifically described here are implemented. This is similar to Examples 1-5.

[0078] Figure 15(A) is a perspective view of the drying apparatus 10 with the louvers 2001 closed. Figure 15(B) is a perspective view of the drying apparatus 10 with the louvers 2001 open. Figure 16(A) is a cross-sectional view of Figure 15(A) along the cross-sectional line 2020 (cross section perpendicular to the X direction) as seen from arrow A, and Figure 16(B) is a cross-sectional view of Figure 15(B) along the cross-sectional line 2021 (cross section perpendicular to the X direction) as seen from arrow A.

[0079] As shown in Figures 15(A) to 16(B), the louvers 2001 are arranged in a total of six pieces, with three in the Z direction and two in the X direction. That is, the multiple louvers 2001, which serve as multiple occluding members, are arranged not only in the width direction of the transport path of the recording medium P, but also in the height direction (Z direction) which intersects (orthogonal in this embodiment) both the width direction and the direction in which the transport path extends. Power from the louver drive motor 2002 is transmitted to one end of the louver shaft 2004 fixed to the louver 2001 via the connecting gear 2003. The other end of the louver shaft 2004 is driven by the louver bearing 2005, causing the louver 2001 to rotate. As shown in Figure 16(A), when the louvers 2001 are closed, the vertically aligned louvers 2001 are in a vertical position, blocking the exhaust section RTo. On the other hand, as shown in Figure 16(B), when the louvers 2001 are open, the vertically aligned louvers 2001 are in a horizontal position.

[0080] The opening amount (closing amount) of the exhaust section RTo2 (louver 2001) can be changed by adjusting the opening width of the louver 2001 using the adjustment unit 16, as in Example 1. The opening width of the louver 2001 may be, for example, the sum of the opening widths of each louver 2001 arranged in the Z direction. The opening width of each individual louver 2001 may be determined, for example, by using a virtual line (virtual plane) parallel to the direction along the guide surface of the guide unit 9, passing through the height of the lower end (tip) of the louver 2001 when fully closed, as the opening reference line (opening reference plane). That is, the distance (shortest distance) between this reference line and the lower end of each louver 2001 may be used as the opening width for each louver 2001.

[0081] Furthermore, while the horizontally arranged louvers 2001 are controlled to change the opening amount of each louver, similar to Example 1, the vertically arranged louvers 2001 are configured to change their opening amount uniformly in conjunction with each other. However, the opening amount of each vertically arranged louver 2001 may also be individually adjustable. This would enable more precise exhaust volume control.

[0082] As described in each of the above embodiments, the opening ratio of the exhaust section RTo (exhaust port) is determined by various means, and in this embodiment as well, the opening of each louver 2001 is driven according to the determined required opening amount. In this embodiment, the adjustment unit 16 is composed of six louvers, but the number of louvers may be four (two in the Y direction and two in the Z direction) or more.

[0083] (Example 7) Embodiment 7 of this disclosure will be described using Figures 17(A) to 18(C). In this embodiment, the adjustment unit 16 is configured with a shutter. Here, in Embodiment 7, components common to Embodiments 1 to 6 are denoted by the same reference numerals as in Embodiments 1 to 6, and the differences from Embodiments 1 to 6 will be mainly described. Matters in Embodiment 7 that are not specifically described here are the same as in Embodiments 1 to 6.

[0084] Figure 17(A) is a perspective view of the drying apparatus 10 with the shutter 2010 closed. Figure 17(B) is a perspective view of the drying apparatus 10 with the shutter 2010 half-open. Figure 17(C) is a perspective view of the drying apparatus 10 with the shutter 2010 fully open. Furthermore, Figure 18(A) is a cross-sectional view of Figure 17(A) along section line 2021 (a section perpendicular to the X direction) as seen from arrow A. Figure 18(B) is a cross-sectional view of Figure 17(B) along section line 2021 (a section perpendicular to the X direction) as seen from arrow A. Figure 18(C) is a cross-sectional view of Figure 17(C) along section line 2021 (a section perpendicular to the X direction) as seen from arrow A.

[0085] The shutter 2010 is configured so that one end can be wound up at a position away from the transport path of the recording medium P. The other end of the shutter 2010 can move back and forth between a position close to the transport path and a position away from it in the height direction, which intersects with both the width direction and the transport path of the recording medium P, by adjusting the amount of winding at the one end. As the position of the other end of the shutter 2010 changes, the degree to which the shutter 2010 blocks the opening of the exhaust section RTo changes, and the amount of closure of the opening of the exhaust section RTo by the shutter 2010 is adjusted.

[0086] As shown in Figures 17(A) to 17(C), the shutter 2010 is equipped with shutter guides 2015 on its left and right sides, and the operation of the shutter 2010 is restricted by the shutter guides 2015. The opening amount of the exhaust section RTo2 can be changed by adjusting the opening width of the exhaust section RTo2 using the adjustment unit 16. The opening width of the exhaust section RTo2 (shutter 2010) can be the distance (shortest distance) between the extension line 9x, which is a virtual line (virtual plane) along the guide surface of the guide unit 9, and the lower end of the shutter 2010 (shutter plate 2011), as in Embodiment 1.

[0087] As shown in Figures 18(A) to (C), the shutter 2010 is configured with multiple shutter plates 2011 connected by hinges 2012. The shutter 2010 can be retracted by a shutter drive motor 2013. As shown in Figure 18(A), when the shutter 2010 is closed, the shutter plates 2011 block the exhaust section RTo. On the other hand, as shown in Figure 18(C), when the shutter 2010 is open, the shutter plates 2011 are retracted by the shutter drive motor 2013, and the exhaust section RTo opens.

[0088] As described in each of the above embodiments, the aperture ratio of the exhaust section RTo is determined by various means, and in this embodiment as well, the aperture of each shutter 2010 is driven according to the determined required aperture amount. In this embodiment, the shutters are arranged in a configuration with two divisions in the X direction, but a greater number of divisions may be used.

[0089] (Example 8) The drying apparatus 10 of the recording device 1 according to Example 8 will be described using Figures 19 and 20. Figure 19 is a schematic diagram of the drying apparatus 10 according to Example 8. Figure 20 is a diagram showing the airflow inside the drying apparatus 10 according to Example 8. Here, in Example 8, components common to Examples 1 to 7 are denoted by the same reference numerals as in Examples 1 to 7, and the differences from Examples 1 to 7 will be mainly described. Matters in Example 8 that are not specifically described here are the same as in Examples 1 to 7.

[0090] The drying apparatus is equipped with an adjustment unit 16, similar to that in Example 1. In Example 8, multiple partition plates 2030 are provided on the transport path RT0 facing the circulation passage RT1. Each partition plate 2030 can be controlled by the control means 2031. When the recording medium P used is small compared to the maximum width of the apparatus, in the drying apparatus 10 of Example 8, the recording medium P is located towards the right end of the apparatus width. Since the amount of moisture contained in the air passing over the recording medium P on which the image is recorded increases, drying efficiency is better if as much air as possible is exhausted from that area and the air in areas without recording medium P is circulated without exhausting as much as possible. Of the adjustment units 161 and 162, adjustment unit 161 is an adjustment unit (first closure member) positioned in a location corresponding to the area (first area) through which the recording medium P passes in the transport path area of ​​the recording medium P which is divided in the width direction. Adjustment unit 162 is positioned in a location corresponding to the area (first area) through which the recording medium P passes in the transport path area of ​​the recording medium P which is divided in the width direction. This becomes an adjustment unit (second closure member) positioned in a location corresponding to the second region. Therefore, the adjustment unit 162 in the region through which the recording medium P does not pass reduces the exhaust volume in this region by closing it, and the adjustment unit 161 in the region through which the recording medium P passes increases the exhaust volume in this region by opening it. In other words, the amount of closure of the opening of the exhaust section RTo by the adjustment unit 162 is made greater than the amount of closure by the adjustment unit 161. Furthermore, the partition plate 2030, which acts as a partition member, is raised as shown in Figure 19(B). The partition plate 2030 can take an upright position as a partition position that separates the first region and the second region inside the opening of the exhaust section RTo in the direction along the transport path of the recording medium P, and a lying position along the transport path as a non-partition position that does not partition. When the amount of closure by the adjustment unit 162 is to be greater than the amount of closure by the adjustment unit 161, the partition plate 2030 is made to take the partition position. Furthermore, at this time, the total volume of exhaust gas discharged from the exhaust section RTo is set to a circulation rate determined by the aforementioned set temperature.

[0091] Figure 20(A) shows the airflow when the partition plate 2030 is not raised. It is desirable to reuse as much of the dry air in the area not passing through the recording medium P as possible. However, when the partition plate 2030 is not raised, some of it is exhausted to the outside from the adjustment unit 161 side.

[0092] On the other hand, Figure 20(B) shows the airflow when the partition plate 2030 is raised. The partition plate 2030 divides the circulation passage RT1, and the air flowing through region 2033 and region 2023 does not mix on the transport path RT0.

[0093] Furthermore, if the opening amounts of both adjustment unit 161 and adjustment unit 162 are increased, the partition plate 2030 may be kept in a position where it is not upright, that is, lying flat parallel to the transport path of the recording medium P.

[0094] (Example 9) The drying apparatus 10 provided in the recording device 1 according to Example 9 will be described using Figures 21 to 23. Figure 21 is a flowchart showing an example of processing by the control unit 20 involved in the control of the drying apparatus 10. Figure 22 is a schematic diagram of the drying apparatus 10 according to Example 9. Figure 23 is a table that defines the relationship between the type of recording medium and the aperture ratio of the adjustment unit. Here, in Example 9, components common to Examples 1 to 8 are denoted by the same reference numerals as in Examples 1 to 8, and the differences from Examples 1 to 8 will be mainly described. Matters in Example 9 that are not specifically described here are the same as in Examples 1 to 8.

[0095] As shown in Figure 22, the drying apparatus 10 is equipped with an adjustment unit 16, similar to that in Embodiment 1. In Embodiment 9, the adjustment unit 16 is divided into two sections, and the amount of control for each movable member (flapper) 161, 162 of the adjustment unit 16 is determined by the type of recording medium P and the paper width via the operation panel 31 or an external terminal 32 such as a personal computer. The method of determination is described below.

[0096] As described above, the adjustment unit 16 exhausts as much air with a high moisture content as possible and circulates air with a low moisture content. Similar to the explanation in Example 4, the air upstream of the interface 50 in the internal space SP is recirculated, and the air downstream is exhausted. Therefore, the region in which the exhaust volume is adjusted by the adjustment unit 16 is the air downstream of the interface 50 in the internal space SP.

[0097] The adjustment flow of the adjustment unit 16 will be explained below using the flowchart in Figure 21. Once the type of recording medium P is determined by the panel 31 or external terminal 32, the drying device starts generating hot air to reach the set temperature (S91). Next, Figure 2 As shown in example 3, the opening ratio of the left and right movable members 161 and 162 is determined according to a table uniquely determined from the type of recording medium and paper width (S92). Furthermore, the type and width of the recording medium P are not limited to the determination by the panel 31 or external terminal 32 described above. In other words, the configuration of the acquisition means for acquiring information about the recording medium P being transported (type of recording medium P, width, etc.) is not limited to a specific configuration. For example, the opening ratio of the left and right movable members 161 and 162 may be determined based on information about the media type and media width automatically detected by a media sensor provided above the printing surface of the recording medium P, for example, mounted on the carriage 3 (S92). In short, the effect is not limited to any configuration as long as a mechanism capable of determining the type of recording medium P is provided.

[0098] In this embodiment, the widths W1 and W2 of the movable members 161 and 162 are divided into 36-inch sections. When the width of the recording medium P exceeds 36 inches, both movable members 161 and 162 are rotated. When the width of the recording medium P is 36 inches or less, only the movable member 161 located on the reference side of the recording medium P is operated, and the movable member 162 is fully closed. This control improves drying efficiency. Furthermore, the opening ratio is set to an opening ratio that is approximately proportional to the maximum ink input amount.

[0099] Here, the maximum ink density is uniquely determined for each type of media, depending on the components of the ink being densityed, as well as the penetration and fixing speed of the recording medium P to the ink components. Generally, inkjet-specific media with an ink-receiving layer can have a larger maximum density, resulting in better color reproduction. On the other hand, media without an ink-receiving layer, such as plain paper, are inexpensive but have a limited ink density.

[0100] The number of divisions of the movable member of the adjustment unit 16 is not limited to two divisions as in this embodiment. Further efficiency can be expected by setting the opening state and opening ratio for each division in more detail using a table. The types of recording media P are not limited to the nine types shown in Figure 23. A configuration that allows for the creation of new tables is also possible.

[0101] In S93, the control unit 20 determines whether the temperature of the hot air set in S91 exceeds temperature T1. If the set temperature exceeds temperature T1, the process proceeds to S95; otherwise, it proceeds to S94. In S94, the control unit 20 sets the positions of the movable members 161a and 162a to their initial state. In S95, the control unit 20 displaces the position of each flapper of the divided adjustment unit 16 according to the control amount determined in S92. In S96, the control unit 20 starts blowing hot air using the hot air blowing unit 11. In S97 and S98, the process stops or transitions to a standby state in the same flow as in Embodiment 5.

[0102] As described above, by controlling the adjustment unit 16 according to the maximum ink printing amount of the recorded data determined by the media width and media type, the ratio of outside air and hot air supplied to the blower unit 12 can be changed in a simple flow. This allows for selective exhaust of low-temperature, high-humidity air and circulation of high-temperature, low-humidity air while ensuring that the blower unit 12's operating temperature is not exceeded. Furthermore, it is possible to prevent deterioration of the blower unit 12, reduce power consumption, and improve drying efficiency at the same time.

[0103] (Example 10) In the invention described in Patent Document 1 above, it is not possible to adjust the circulation efficiency of the hot air blown onto the recording medium, and therefore the internal temperature may not be properly adjusted.

[0104] Therefore, in this embodiment, a drying apparatus, a recording device, and a control method for the drying apparatus that can suppress power consumption while appropriately adjusting the hot air will be described below. Note that explanations that overlap with Examples 1 to 9 will be omitted.

[0105] Figure 25(a) is a schematic diagram of a recording device 1000 according to one embodiment of the present disclosure. The recording device 1000 of this embodiment is an inkjet recording device that performs recording by ejecting liquid ink from a recording head 400 onto a recording medium P. However, the present disclosure is also applicable to other types of recording devices. In the figure, arrows X and Y indicate the horizontal direction which intersects each other, and arrow Z indicates the vertical direction. In this embodiment, the X direction and the Y direction are orthogonal.

[0106] The recording device 1000 includes a transport unit that corresponds to a transport means for transporting the recording medium P. In Figure 25(a), a pinch roller is shown, but other forms are also possible. Furthermore, the method of transporting the recording medium is not limited to the configuration in Figure 25(a) in which the recording medium is wound onto different rollers (not shown) before and after recording, but for example, a configuration in which cut paper is transported and recorded is also possible.

[0107] The recording device 1000 ejects ink from the recording head 400 and ejects the ink onto the recording medium P while scanning in the X direction (left-right direction) with the carriage 500. At the same time, the recording medium P is intermittently transported in the -Y direction by the transport unit 300, in other words, the recording medium P is transported along the transport path, thereby recording an image on the surface of the recording medium P. The platen 600 faces the recording head 400 in the scanning area of ​​the carriage 500 and suppresses the floating of the recording medium P by suctioning from the back side (back side of the recording surface) of the recording medium P.

[0108] Next, the drying configuration for drying and fixing the ink will be described. The platen air blowing unit 1001 is provided on the upstream side in the transport direction of the recording medium P and can blow air toward the surface (recording surface) of the recording medium P on the platen 600. This promotes the evaporation of moisture contained in the ink discharged onto the surface of the recording medium P on the platen 600, thereby promoting the fixing of the ink.

[0109] The fixing unit 200 is located downstream of the scanning area of ​​the carriage 500 in the transport direction of the recording medium P, and is responsible for drying and fixing the ink applied to the recording medium P. The fixing unit 200 is roughly box-shaped, and its bottom surface faces the transport surface of the recording medium P. By blowing warm air from its bottom surface toward the recording medium P, the ink and the recording medium P are heated, resulting in the evaporation of liquid components (such as water) contained in the ink and the formation of a film of resin components (such as resin particles).

[0110] Figure 25(b) is a block diagram illustrating an example of the control system configuration in the control means 209, which will be described later. The CPU 301 controls at least one selected from the group consisting of the fuser fan 203, fuser heater 205, and flapper 208 (227), which will be described later, according to the control program recorded in the ROM 305. The user inputs conditions for drying and fixing the ink, such as the temperature of the hot air, from the operation panel 302. These conditions are input to the CPU 301 via the input interface 303. The CPU 301 also writes and reads user-set hot air temperature and measured temperature to and from the RAM 304. The fuser fan 203, fuser heater 205, and flapper 208 (227) are controlled by the CPU 301 based on the set temperature written to the fuser heater 205 and the detection results of the first temperature sensor 210, second temperature sensor 211, and humidity sensor 226, which will be described later. The first temperature sensor 210 and the second temperature sensor 211 can be rephrased as temperature detection means, and the humidity sensor 226 can be rephrased as humidity detection means. The image information to be printed is input to the CPU 301 from an external terminal 306 such as a personal computer via the input interface 303. The second temperature sensor 211 and the humidity sensor 226 are optional.

[0111] <Fuser Unit 200> The fixing unit 200 of the recording device 1000 according to this embodiment will be described below with reference to Figure 26.

[0112] The fixing unit 200 includes an intake section 201 and a chamber 202. The intake section 201 has a fixing fan 203 which corresponds to a blowing means that generates airflow inside, and has an intake port 204 facing the recording medium P that takes in outside air O and circulated warm air Wc. The chamber 202 which corresponds to a guiding means has a fixing heater 205 which corresponds to a heating means that heats the air that flows inside and generates warm air W. In other words, heated air (warm air) can be blown by using the fixing fan 203 which corresponds to a blowing means and the fixing heater 205 which corresponds to a heating means. Here, the fixing fan 203 and the fixing heater 205 can be considered together as a heating and blowing means. The intake section 201 is located upstream of the chamber 202 in the transport direction, i.e., on the carriage 500 side.

[0113] Air taken in from the intake port 204 into the intake section 201 is sent into the chamber 202 by the fixing fan 203 and heated by the fixing heater 205 to become warm air W. The warm air W is then blown almost uniformly onto the recording medium P from multiple jet holes 206 provided in the chamber 202 to dry and fix the ink on the recording medium P. A portion of the warm air W blown onto the recording medium P is released to the outside from the exhaust port 207, which corresponds to the exhaust means on the opposite side of the intake section 201 of the fixing unit 200 (this warm air will be hereinafter referred to as Wout). In addition, a portion of the warm air W is circulated by the suction of the fixing fan and taken in again into the intake section 201 from the intake port 204 (this warm air will be hereinafter referred to as Wc). The warm air Wc circulated in the intake section 201 is then mixed with the outside air O, and air at a higher temperature than the outside air O is sent to the fixing heater 205 inside the chamber 202.

[0114] Here, the flow rate of the hot air Wout discharged to the outside from the outlet 207 is almost the same as the flow rate of the outside air O flowing in from the intake port 204. Therefore, controlling the flow rate of the hot air Wout discharged to the outside from the outlet 207 is equivalent to controlling the amount of hot air Wc circulating inside the fixing unit 200. Furthermore, the control means 209 controls the hot air temperature by controlling the rotation of the fixing fan 203 and controlling the current and voltage of the fixing heater 205 according to the output (detection result) of the first temperature sensor 210 installed in the chamber 202.

[0115] <Duct 220> Next, we will describe the duct 220 that guides a portion of the warm air W discharged from the outlet 207 to the fixing fan 203.

[0116] Duct 220 is a component that connects the outlet 207 and the fixing fan 203, and is installed at the top of the chamber 202. This duct 220 has a flow path for drawing in the warm air coming out of the outlet 207 and guiding it to the fixing fan 203. The duct 220 has an opening 220b near the outlet 207 and an opening 221 near the fixing fan 203 in the chamber 202. Here, opening 220b is an inlet for air heated by the heating and blowing means to enter the airflow path formed by the duct 220. With this configuration, the outlet 207 and the fixing fan 203 are in communication, and the suction operation of the fixing fan 203 can guide (induce) the warm air near the outlet 207 to the fixing fan 203 via the duct 220. In other words, the warm air that was flowing out of the outlet 207 can be returned to the fixing fan 203 and reused, improving the circulation efficiency of the warm air and, as a result, reducing power consumption.

[0117] The details of the above configuration will be explained using Figures 27(a) and 27(b). In this specification, "width" refers to the direction intersecting the transport direction of the recording medium. Figure 27(a) is a schematic diagram showing a cross-section of the duct 220. The width of the outlet 207 is wider than the width of the fixing fan 203. Therefore, in order to guide the warm air coming out of the exhaust port 207 to the fixing fan 203, the width of the opening 220b of the duct 220 is wider than the width of the fixing fan 203. In addition, in order to draw the warm air coming out of the exhaust port 207 to the fixing fan 203 in a nearly uniform manner in the width direction, it is necessary to guide the warm air in a way that makes it easy to draw in even from positions far from the fixing fan 203.

[0118] Figure 27(b) is a cross-sectional view of the duct 220 at a different location than that shown in Figure 27(a). The opening 222 is provided in the opening 220b of the duct 220, allowing hot air to be guided through it. The opening 222 consists of an opening a223 that covers the entire width of the opening 220b and an opening b224 at the end. If only an opening corresponding to opening a223 is provided as the opening 222, as in Figure 27(a), the fixing fan 203 will not be able to adequately draw in the hot air at the end. As a result, not only will the circulation efficiency of the hot air not improve, but the hot air will become uneven in the width direction, causing temperature unevenness and potentially leading to poor image fixing. On the other hand, in this embodiment, an additional opening b224 is provided at the end of the duct 220. The area of ​​this opening b224 is made larger in proportion to its distance from the fixing fan 203. As a result, uniform suction in the width direction becomes possible.

[0119] Figure 28 shows another configuration of the duct 220. Unlike Figure 27(b), which has openings a223 and b224, Figure 28 has an opening c225. This opening c225 has the same width as opening a as the entire width of opening 220b, and has a shape in which the cross-sectional area increases with distance from the fixing fan 203. Even with this configuration, it is possible to perform uniform suction in the width direction.

[0120] Next, the flow of hot air in the fixing unit 200 will be explained. In Figure 26, a portion of the hot air blown from the chamber 202 flows upstream in the conveying direction. Subsequently, a portion of this hot air is taken into the intake section 201 via the intake port 204, sucked into the fixing fan 203, and returned to the chamber 202 (upstream circulation). Similarly, a portion of the hot air that flows downstream is also sucked into the fixing fan 203 via the exhaust port 207 and duct 220, and returned to the chamber 202 (downstream circulation). Thus, the fixing unit 200 is configured to circulate hot air through the circulation passage formed by the chamber 202 and other components. In other words, the chamber 202, duct 220, and the fixing unit 200 itself can be considered as means for forming a circulation passage. Furthermore, by providing a duct 220 that guides the hot air exhausted from the exhaust port 207 to the fixing fan 203, it is possible to perform both upstream and downstream circulation. As a result, the circulation efficiency of the hot air is improved, and power consumption can be reduced.

[0121] (Circulation adjustment) As described above, by providing the duct 220, it becomes possible to perform upstream and downstream circulation, improving the circulation efficiency of hot air and reducing power consumption. However, when the circulation efficiency of hot air increases, the temperature of the hot air flowing into the fixing fan 203 rises, and may exceed the heat resistance temperature of the fixing fan 203. Therefore, next, a configuration and control that takes into account the heat resistance temperature of the fixing fan 203 will be described. In this embodiment, the configuration takes into account the heat resistance temperature of the fixing fan 203, but the temperature to be considered does not have to be derived from the fixing fan. For example, control can be performed by focusing on the component with the lowest heat resistance temperature among the components present in the internal structure of the fixing unit 200.

[0122] Figure 29(a) is a schematic diagram of the fuser unit 200 when the set temperature of the hot air is high, and Figure 29(b) is a schematic diagram of the hot air set temperature when it is low.

[0123] The means for adjusting the downstream circulation is a plate-shaped flapper 208 that can adjust the degree of opening in the duct 220. This flapper 208 is moved by a drive means (motor and gears) not shown. By doing so, the degree of opening of the duct 220 can be changed, and the amount of air heated by the heating and blowing means entering the duct 220 can be controlled. Here, the movement of the flapper 208 can be rotational or linear. Due to constraints on the arrangement of the drive means, the flapper 208 may not be able to completely close the opening of the duct 220. Therefore, by providing an auxiliary member to the flapper 208 or the drive means, assistance can be provided in completely closing the opening of the duct 220. The auxiliary member can be, for example, an elastic member. In addition, by providing a lever that is biased by a spring when the flapper is close to the closed state, the gap between the flapper and the duct can be made to fit tightly and be eliminated.

[0124] Figure 29(a) shows a schematic diagram of the fixing unit 200 with the opening 220b almost closed, and Figure 29(b) shows a schematic diagram of the fixing unit 200 with the opening 220b open. As shown in Figure 29(b), the wider the opening 220b of the duct 220, the greater the amount of hot air drawn in through the duct 220 by the fixing fan 203. As a result, the amount of hot air Wout released to the outside decreases, the amount of downstream circulation increases, and the hot air circulation efficiency in the fixing unit 200 increases. On the other hand, as shown in Figure 29(a), the narrower the opening 220b of the duct 220 is made by moving the flapper 208 closer to the duct 220, the less hot air is drawn in through the duct 220 by the fixing fan 203. As a result, the amount of hot air Wout released to the outside increases, the amount of downstream circulation decreases, and the hot air circulation efficiency in the fixing unit 200 decreases. As described above, by improving the circulation efficiency of the hot air, the temperature of the air supplied to the fuser heater 205 increases, and the amount of heating required by the fuser heater 205 is reduced compared to when heating the outside air O. As a result, the power consumption of the fuser heater 205 can be reduced, making it possible to lower overall power consumption.

[0125] The fuser unit 200 includes an input unit 219 and a control means 209. In this embodiment, a second temperature sensor 211 is provided near the fuser fan 203 to detect the temperature of the hot air flowing into the fuser fan 203. The temperature sensor provided to detect the temperature of the hot air flowing into the fuser fan 203 may be provided at a location other than near the fuser fan 203. In that case, the temperature of the hot air flowing into the fuser fan may be estimated from a previously acquired temperature distribution or the like.

[0126] The input unit 219 is used to set the temperature of the hot air, and the user can set the temperature directly or indirectly. The control means 209 controls the power of the fuser heater 205 and the adjustment means (opening and closing operation of the flapper 208) according to the rotation speed of the fuser fan 203, the temperature setting information from the input unit 219, and the measurement value from the first temperature sensor 210 provided inside the chamber 202. Specifically, the control means 209 determines the temperature of the air flowing into the fuser fan 203 from the measurement value from the second temperature sensor 211, and determines the voltage applied to the fuser heater 205 according to the measurement value from the first temperature sensor 210.

[0127] In this embodiment, control when the set temperature of the hot air is high will be explained using Figure 29(a). The fuser fan 203 has a specified temperature (heat resistance temperature) determined from the bearings, grease, and electrical circuit board used. Therefore, the temperature of the hot air flowing into the fuser fan 203 must be lower than the specified temperature of the fuser fan 203. If the set temperature input to the input unit 219 is high, the circulation efficiency of the hot air will increase, and the temperature of the hot air flowing into the fuser fan 203 may exceed the specified temperature of the fuser fan 203. Therefore, if the set temperature is such that the temperature of the hot air flowing into the fuser fan 203 exceeds the fan's specified temperature, the control means 209 reduces the circulation efficiency of the hot air, that is, moves the flapper 208 so that the opening of the outlet 207 widens. Furthermore, the second temperature sensor 211 continues to measure the temperature, and if the temperature of the hot air flowing into the fuser fan 203 tends to be higher than the specified temperature of the fuser fan 203, the control means 209 controls the voltage applied to the fuser heater 205 to be lowered. As a result, even with a high set temperature, the temperature will not exceed the specified temperature of the fuser fan 203. This can suppress the inflow of hot air into the fuser fan 203. Furthermore, the above-mentioned control to reduce the hot air circulation efficiency and the control to reduce the applied voltage do not need to be based on the specified temperature of the fuser fan 203. For example, the above control can be performed based on a temperature set with a margin above the specified temperature of the fuser fan 203.

[0128] Next, the control of the fixing unit 200 of this embodiment when the set temperature of the hot air is low will be explained using Figure 29(b). When the set temperature of the hot air is low, the temperature of the circulating hot air Wc becomes low. In this case, the control means 209 moves the flapper 208 so that the opening of the outlet port 207 becomes narrower. This control reduces the amount of hot air Wout flowing out to the outside, and reduces the amount of outside air O taken in at the intake port 204. As a result, the circulation efficiency of the hot air can be further increased and power consumption can be suppressed. Note that even when the set temperature of the hot air is low, if the circulation efficiency of the hot air is increased too much, the temperature of the hot air may approach the fan's specified temperature. In that case, as in the example above, by continuing to measure with the second temperature sensor 211, the control means 209 can perform appropriate control and prevent the temperature of the hot air from reaching the fan's specified temperature. Thus, whether the set temperature of the hot air is high or low, it is possible to control the temperature of the hot air so as not only to suppress power consumption but also to prevent it from exceeding the heat resistance temperature.

[0129] The control of the opening of the duct 220's opening 220b by the flapper 208 will be explained using Figure 30. Figure 30 shows the relationship between the set temperature and the opening area, with the set temperature on the horizontal axis and the opening area of ​​the duct 220's opening 220b on the vertical axis. Figure 30(a) shows the relationship between the set temperature and the opening area when the opening area of ​​the duct 220's opening 220b is gradually reduced in relation to the set temperature. Specifically, when the set temperature is below the first set temperature, the opening area of ​​the duct 220's opening 220b is set to the initial state. When the set temperature is higher than the first set temperature, the opening area of ​​the duct 220's opening 220b is gradually reduced as the temperature rises. Then, the control is made so that the opening area of ​​the duct 220's opening 220b is minimized at the second set temperature. Here, the first and second set temperatures can be set as appropriate. In particular, the second set temperature can be set to the highest temperature that can be set.

[0130] Figure 30(b) shows the relationship between the set temperature and the opening area when the opening area of ​​the opening 220b of the duct 220 is controlled to change in steps relative to the set temperature. Specifically, when the set temperature is below the first set temperature, the control means 209 sets the opening area of ​​the opening 220b of the duct 220 to its initial state. Then, when the set temperature is higher than the first set temperature, the control means 209 gradually reduces the opening area of ​​the opening 220b of the duct 220 as the set temperature rises, controlling it so that the opening area of ​​the outlet 207 is maximized at the second set temperature.

[0131] In this way, the control means 209 controls the opening area of ​​the duct 220 opening 220b by opening and closing the flapper 208 according to the set temperature of the hot air, thereby appropriately changing the circulation efficiency of the hot air. Here, the drive of the flapper 208 that adjusts the opening area of ​​the duct 220 opening 220b may be manual or electric. Note that the initial state in Figure 30 is when the flapper 208 does not cover the opening 220b of the duct 220, as shown in Figure 29(b), in which case the opening area is close to 100%, which is the maximum. On the other hand, when the flapper 208 covers the opening 220b of the duct 220, as shown in Figure 29(a), the opening area is close to 0%, which is the minimum.

[0132] Furthermore, by providing a locking mechanism on the flapper 208, it is possible to suppress the movement of the flapper 208 even in the event of unintentional external forces applied by the user or from the outside. A known locking mechanism can be used as appropriate; for example, it can be configured to include a torque limiter. In addition, it is preferable to provide a sensor that detects the degree of opening of the flapper 208. Even if the control means 209 executes control to move the flapper 208, the sensor detects the movement of the flapper. If the error cannot be detected, the system can instead take control of the fuser heater. Alternatively, the fuser heater 205 may be stopped, and the user may be notified of the error.

[0133] The outlet cover 213 is provided either on the inside or outside of the flapper 208. Figures 29(a) and 29(b) are schematic diagrams of the fixing unit 200 when the outlet cover 213 is provided on the outside of the flapper 208. The outlet cover 213 is configured so as not to obstruct the outflow of hot air by providing an opening or the like.

[0134] In the above embodiments, the control means 209 performed various controls according to the set temperature of the hot air and the temperature of the hot air in the intake unit 201. However, a humidity sensor 226 may also be provided inside the fixing unit 200, and the control means 209 may perform various controls according to the measured value. In this case, if the humidity is low, the control means 209 will control the system to increase the circulation efficiency, and if the humidity is high, the control means 209 will control the system to decrease the circulation efficiency. By performing such controls, power consumption can be suppressed when the humidity is low, and when the humidity is high, the system can take in more outside air to lower the humidity of the circulating hot air, thereby improving drying efficiency.

[0135] Furthermore, the control means 209 may perform various controls according to the amount of ink applied from the recording head 400 to the recording medium P. In this case, if the amount of ink applied is small, the control means 209 controls to increase the circulation efficiency, and if the amount of ink applied is large, the control means 209 controls to decrease the circulation efficiency. By performing such controls, power consumption can be suppressed when humidity is low, and when humidity is high, the control means 209 can take in more outside air to lower the humidity of the circulating warm air, thereby improving drying efficiency.

[0136] (Example 11) Using Figure 31, the configuration for suppressing power consumption in this embodiment will be explained. Figure 31 is a schematic diagram of the fixing unit 200 in this embodiment. In this embodiment, in addition to the flapper 208 in previous embodiments, a flapper 227 is further provided at the opening 221 near the fixing fan 203 of the duct 220. When the set temperature is high, the control means 209 controls the two flappers to close, suppressing the airflow inside the duct 220. As a result, the inside of the duct 220 is insulated, which leads to suppressing heat dissipation from the chamber 202. As a result, power consumption is reduced.

[0137] Next, the control methods for the control means 209 in each embodiment will be explained using Figures 32A to C. Figure 32A shows the control flow in Example 10, Figure 32B shows the control flow when a humidity sensor 226 is added to Example 10, and Figure 32C shows the control flow in Example 11. In each control flow, the same symbols are used for identical steps, and their explanations are omitted.

[0138] The control flow in Figure 32A will be explained step by step. First, the user inputs a set temperature into the input (S101). The CPU 301 checks whether the input set temperature exceeds the first temperature (S102). If the CPU 301 confirms that it exceeds the first temperature, the CPU 301 controls the control means 209 according to the relationship between the set temperature and the control means as shown in Figure 30 (S103). In other words, the flapper 208 is moved to set the appropriate opening area of ​​the opening 220b of the duct 220. On the other hand, if the CPU 301 confirms that it is below the first temperature, the CPU 301 controls the flapper 208 to return it to its initial state via the control means 209 (S104). Here, the initial state refers to the state of the flapper, which can be determined as appropriate, but in the flow of Figures 32A-C, it refers to the state in which the flapper 208 covers the opening 220 as shown in Figure 29(a).

[0139] After S103 or S104, the CPU 301 controls the fixing fan 20 via the control means 209. The fan 3 is driven to rotate, and voltage is applied to the fuser heater 205 to generate hot air at a predetermined temperature and airflow velocity (S105). The CPU 301 obtains the measurement value from the second temperature sensor 211, that is, the hot air temperature near the fuser fan 203 (S107), and determines whether it is above the predetermined temperature (S108). In this embodiment, the predetermined temperature is a value with a margin over the specified temperature of the fuser fan 203, but this margin is not required and can be changed as appropriate.

[0140] In S108, if the CPU 301 determines that the measurement value obtained from the second temperature sensor 211 is above a predetermined temperature, the CPU 301 controls the flapper 208 to move closer to the opening 220 via the control means 209 and close it (S109). After S109, or if the CPU 301 determines that the measurement value obtained from the second temperature sensor 211 in S108 is below the predetermined temperature, the CPU 301 determines whether the recording job sent to the recording device 1 has finished (S106). If the CPU 301 determines that the upper part of the printing has finished, it terminates the recording control. On the other hand, if the CPU 301 determines that it has not finished, it returns to the control in S105 and repeats until the recording control is terminated.

[0141] Next, the control flow in Figure 32B will be explained step by step. The control up to S105 is the same as in Figure 32A. After S105, the CPU 301 acquires humidity information in addition to the measurement value from the second temperature sensor (S207). This humidity information is acquired by the humidity sensor 226. After that, the CPU 301 determines whether the temperature is above a predetermined level or whether the humidity is above a predetermined level (S208). If the CPU 301 determines in S208 that the temperature is above a predetermined level or the humidity is above a predetermined level, the CPU 301 controls the flapper 208 to move closer to the opening 220 via the control means 209 and close it (S209). As a result of this control, downstream circulation is eliminated, so the temperature of the hot air flowing into the fixing fan 203 decreases, the circulation efficiency of the hot air decreases, and the amount of outside air O taken in increases. As a result, not only the temperature of the hot air but also the humidity can be reduced.

[0142] Finally, the control flow in Figure 32C will be explained step by step. Up to S108, the control is the same as in Figure 32A. If the CPU 301 determines in S108 that the measurement value of the second temperature sensor 211 is above a predetermined temperature, the CPU 301 controls the flappers 208 and 227 to move closer to the opening 220 via the control means 209 and close it (S309).

[0143] Based on the above, by performing the above control in each embodiment, it is possible to suppress power consumption while appropriately adjusting the temperature and humidity of the circulating hot air.

[0144] The configurations of each of the above embodiments can be combined with each other.

[0145] The disclosure of embodiments of the present invention includes the following configurations. (Composition 1) A transport means for transporting a recording medium from which liquid has been discharged, A drying region forming means having a hot air generating unit, a flow path partition that defines a circulation space in the space opposite to the transport path of the recording medium through which the hot air generated by the hot air generating unit circulates, an introduction unit for introducing outside air into the circulation space, and an discharge unit for discharging a portion of the hot air circulating in the circulation space to the outside of the circulation space, In a drying apparatus equipped with, An adjustment means capable of adjusting the discharge of a portion of the hot air from the opening of the discharge section, comprising an adjustment means having a closing member capable of closing the opening and being capable of adjusting the amount of closing, A drying apparatus characterized by the following features. (Configuration 2) The adjustment means has a plurality of closing members, and the amount of closing of each opening can be adjusted individually. The drying apparatus described in Configuration 1. (Composition 3) The plurality of blocking members are arranged so as to be aligned in the width direction of the recording medium that intersects the transport path. The drying apparatus described in Configuration 2. (Composition 4) The aforementioned plurality of blocking members are arranged so as to be aligned in the height direction that intersects both the transport path and the width direction. A drying apparatus as described in configuration 2 or 3. (Composition 5) The aforementioned circulation space is further equipped with a temperature sensor, The adjustment means adjusts the amount of blockage based on the temperature detected by the temperature sensor. A drying apparatus as described in any one of items 2 to 4 of the configuration. (Composition 6) The temperature sensor is capable of detecting the temperature in each of the multiple regions of the transport path, which is divided in the width direction of the recording medium that intersects the transport path in accordance with the multiple blocking members. The adjustment means increases the amount of closure of the closure member as the detected temperature in the corresponding region increases. The drying apparatus described in configuration 5. (Composition 7) The aforementioned circulating space further comprises a humidity sensor placed in the circulating space, The adjustment means adjusts the amount of blockage based on the humidity detected by the humidity sensor. A drying apparatus as described in any one of configurations 2 to 4. (Composition 8) The humidity sensor is capable of detecting humidity in each of the multiple regions of the transport path, which is divided in the width direction of the recording medium that intersects the transport path in accordance with the multiple blocking members. The adjustment means reduces the amount of occlusion of the occlusion member as the detected humidity in the corresponding region increases. The drying apparatus described in configuration 7. (Composition 9) When a first recording medium with a width narrower than the width of the transport path is transported, The plurality of closing members are, A first blocking member is positioned at a location corresponding to the first region through which the first recording medium passes, among the regions of the transport path that are divided in the width direction of the recording medium intersecting the transport path, A second blocking member is positioned at a location corresponding to a second region in the region of the transport path that is divided in the width direction and through which the first recording medium does not pass; Includes, The adjustment means makes the amount of closure of the second closure member greater than the amount of closure of the first closure member. A drying apparatus described in any one of configurations 2 to 8. (Composition 10) The aforementioned adjustment means is The opening further comprises a partition member configured to be able to take a partitioning position that separates the first region and the second region in a direction along the transport path, and a non-partitioning position that does not partition, When the amount of closure of the second closure member is greater than the amount of closure of the first closure member, the partition member is made to assume the partitioning position. The drying apparatus described in configuration 9. (Composition 11) When a second recording medium is transported, in which the amount of liquid discharged per unit area changes in the width direction, The plurality of closing members are, A first blocking member is positioned at a location corresponding to the first region of the transport path through which the region of the recording medium, which is divided in the width direction of the recording medium and intersects the transport path, passes, among the regions of the recording medium whose discharge amount is the first discharge amount, A second blocking member is positioned at a location corresponding to the second region of the transport path through which a region of the recording medium divided in the width direction passes, where the discharge amount is a second discharge amount that is less than the first discharge amount. Including, The adjustment means makes the amount of closure of the second closure member greater than the amount of closure of the first closure member. A drying apparatus described in any one of configurations 2 to 10. (Composition 12) The adjustment means reduces the amount of closure of the closure member as the amount of discharge in the corresponding region increases. The drying apparatus described in configuration 11. (Composition 13) The system further comprises an acquisition means for acquiring information about the recording medium being transported by the transport means, The adjustment means adjusts the amount of closure of each of the plurality of closure members based on the type of recording medium among the information. A drying apparatus described in any one of configurations 2 to 10. (Composition 14) The adjustment means adjusts the closing amount of each of the plurality of opening / closing members based on the type of information and the width of the recording medium in the width direction of the recording medium intersecting the transport path. The drying apparatus described in configuration 13. (Composition 15) The closing member is an opening / closing member that can rotate around a rotation axis along the width direction of the recording medium intersecting the transport path, and is configured such that the amount of closing decreases as the angle with respect to the direction along the transport path decreases. A drying apparatus as described in any one of configurations 1 to 14. (Composition 16) The closing member is a shutter, with one end configured to be retractable at a position away from the transport path, and the other end configured to adjust the amount of closing by moving back and forth between a position close to the transport path and a position away from the transport path in a height direction that intersects both the transport path and the width direction of the recording medium intersecting the transport path, by adjusting the amount of winding of the one end. A drying apparatus as described in any one of configurations 1 to 14. (Composition 17) The introduction section is provided on the upstream side of the transport path, The discharge section is provided on the downstream side of the transport path. A drying apparatus according to any one of the configurations 1 to 16. (Composition 18) The circulation flow of the warm air in the aforementioned circulation space is In the aforementioned circulation space, on the side separated from the transport path, there is a flow from the upstream side to the downstream side of the transport path, In the aforementioned circulation space, on the side adjacent to the transport path, the flow along the transport path is from downstream to upstream, including, The drying apparatus described in configuration 17. (Composition 19) The flow path section divides the circulation space into a first space separated from the transport path and a second space adjacent to the transport path, and includes a blowing plate having a plurality of holes connecting the first space and the second space. The drying apparatus described in configuration 18. (Composition 20) The hot air generating unit comprises a blowing means and a heating means for heating the air blown by the blowing means. The blowing means is provided in the first space on the upstream side of the transport path and blows air toward the downstream side of the transport path. The heating means is positioned in the first space on the downstream side of the conveying path of the blowing means. The drying apparatus described in configuration 19. (Composition 21) A recording device that records on a recording medium, A dispensing head that dispenses liquid onto a recording medium, A drying apparatus described in any one of configurations 1 to 20, A recording device characterized by comprising the following features. (Composition 22) A transport means for transporting the recording medium from which liquid has been ejected from the recording head, A heating and blowing means comprising a blowing means and a heating means, wherein the heating and blowing means blows air heated by the heating means to the recording medium being conveyed by the conveying means, An air passage for sending the heated air blown from the heating air blowing means to the downstream side in the transport direction of the recording medium back to the heating air blowing means, A drying apparatus characterized by comprising an adjustment means for adjusting the amount of air blown from the heating and blowing means and entering the air passage. (Composition 23) The drying apparatus according to configuration 22, wherein the adjusting means includes a flapper. (Composition 24) The drying apparatus according to configuration 23, wherein the adjusting means adjusts the amount of air blown from the heating and blowing means and entering the air passage by the movement of the flapper. (Composition 25) The system includes a guiding means for guiding the heated air toward the recording medium, A drying apparatus according to any one of the configurations 22 to 24, wherein the width of the air passage is narrower than the width of the guide means and the width of the opening which is an inlet for air to enter the air passage, in a direction intersecting the transport direction of the recording medium. (Composition 26) A drying apparatus according to any one of the configurations 22 to 25, wherein, in a direction intersecting the transport direction of the recording medium, the cross-sectional area of ​​the opening which is the inlet for air entering the air passage is larger in proportion to the distance from the blowing means. (Composition 27) It includes an input section that allows the user to set the temperature of the heating means, The drying apparatus according to any one of the configurations 22 to 26, wherein the adjusting means controls the amount of air based on the temperature set in the input unit. (Composition 28) The aforementioned heating and blowing means comprises a fan and a heater, as described in any one of the configurations 22 to 27. A drying device. (Composition 29) A temperature detection means is provided near the heater. The drying apparatus according to configuration 28, wherein the adjustment means controls the amount of air based on the detection result of the temperature detection means. (Composition 30) A temperature detection means is provided near the aforementioned fan. The drying apparatus according to configuration 28, wherein the adjustment means controls the amount of air based on the detection result of the temperature detection means. (Composition 31) A humidity detection means is provided near the heater. The drying apparatus according to configuration 28, wherein the adjustment means controls the amount of air based on the detection result of the humidity detection means. (Composition 32) A humidity detection means is provided near the aforementioned fan. The drying apparatus according to configuration 28, wherein the adjustment means controls the amount of air based on the detection result of the humidity detection means. (Composition 33) A drying apparatus according to any one of configurations 22 to 32, wherein a flapper is provided near the opening of the air passage toward the heating and blowing means. (Composition 34) A transport means for transporting the recording medium from which liquid has been ejected from the recording head, A heating and blowing means comprising a blowing means and a heating means, wherein the heating and blowing means blows air heated by the heating means to the recording medium being conveyed by the conveying means, An air passage for sending the heated air blown from the heating air blowing means to the downstream side in the transport direction of the recording medium back to the heating air blowing means, A recording device characterized by comprising an adjustment means for adjusting the amount of air blown from the heating and blowing means and entering the air passage. (Method 1) A transport means for transporting the recording medium from which liquid has been ejected from the recording head, A heating and blowing means comprising a blowing means and a heating means, wherein the heating and blowing means blows air heated by the heating means to the recording medium being conveyed by the conveying means, A control method for a drying apparatus comprising: an air passage for sending the heated air blown from the heating air blowing means to the downstream side in the transport direction of the recording medium back to the heating air blowing means, A control method for a drying apparatus, characterized by comprising an adjustment step for adjusting the amount of air blown from the heating and blowing means and entering the air passage. [Explanation of symbols]

[0146] 1: Recording device, 2: Discharge head, 9: Guide unit, 10: Drying device, 11: Hot air blowing unit, 12: Blowing unit, 13: Heating unit, 14: Passage forming unit, 15: Temperature sensor, 16: Adjustment unit, 20: Control unit, P: Recording medium, RT0: Conveying path, RT1: Circulation path, RTi: Inlet, RTo: Exhaust

Claims

1. A transport means for transporting a recording medium from which liquid has been discharged, A drying region forming means having a hot air generating unit, a flow path partition that defines a circulation space in the space opposite to the transport path of the recording medium through which the hot air generated by the hot air generating unit circulates, an introduction unit for introducing outside air into the circulation space, and an discharge unit for discharging a portion of the hot air circulating in the circulation space to the outside of the circulation space, In a drying apparatus equipped with, An adjustment means capable of adjusting the discharge of a portion of the hot air from the opening of the discharge section, comprising an adjustment means having a closing member capable of closing the opening and being capable of adjusting the amount of closing, A drying apparatus characterized by the following features.

2. The adjustment means has a plurality of closing members, and the amount of closing of each opening can be adjusted individually. The drying apparatus according to claim 1.

3. The plurality of blocking members are arranged so as to be aligned in the width direction of the recording medium that intersects the transport path. The drying apparatus according to claim 2.

4. The aforementioned plurality of blocking members are arranged so as to be aligned in the height direction that intersects both the transport path and the width direction. The drying apparatus according to claim 3.

5. The aforementioned circulation space is further equipped with a temperature sensor, The adjustment means adjusts the amount of blockage based on the temperature detected by the temperature sensor. The drying apparatus according to claim 2.

6. The temperature sensor is capable of detecting the temperature in each of the multiple regions of the transport path, which is divided in the width direction of the recording medium that intersects the transport path in accordance with the multiple blocking members. The adjustment means increases the amount of closure of the closure member as the detected temperature in the corresponding region increases. The drying apparatus according to claim 5.

7. The aforementioned circulating space further comprises a humidity sensor placed in the circulating space, The adjustment means adjusts the amount of blockage based on the humidity detected by the humidity sensor. The drying apparatus according to claim 2.

8. The humidity sensor is capable of detecting humidity in each of the multiple regions of the transport path, which is divided in the width direction of the recording medium that intersects the transport path in accordance with the multiple blocking members. The adjustment means reduces the amount of occlusion of the occlusion member as the detected humidity in the corresponding region increases. The drying apparatus according to claim 7.

9. When a first recording medium having a width narrower than the width of the transport path is transported, The plurality of closing members are, A first blocking member is positioned at a location corresponding to the first region through which the first recording medium passes, among the regions of the transport path that are divided in the width direction of the recording medium intersecting the transport path, Of the regions of the transport path that are divided in the width direction, the region that the first recording medium does not pass through A second closure member is positioned in a location corresponding to two regions, Includes, The adjustment means makes the amount of closure of the second closure member greater than the amount of closure of the first closure member. The drying apparatus according to claim 2.

10. The aforementioned adjustment means is The opening further comprises a partition member configured to be able to take a partitioning position that separates the first region and the second region in a direction along the transport path, and a non-partitioning position that does not partition, When the amount of closure of the second closure member is greater than the amount of closure of the first closure member, the partition member is made to assume the partitioning position. The drying apparatus according to claim 9.

11. When a second recording medium is transported, the amount of liquid discharged per unit area changes in the width direction of the recording medium that intersects the transport path, The plurality of closing members are, A first blocking member is positioned at a location corresponding to the first region of the transport path through which the region of the recording medium divided in the width direction, where the region with the discharge amount being the first discharge amount, passes; A second blocking member is positioned at a location corresponding to the second region of the transport path through which a region of the recording medium divided in the width direction passes, where the discharge amount is a second discharge amount that is less than the first discharge amount. Including, The adjustment means makes the amount of closure of the second closure member greater than the amount of closure of the first closure member. The drying apparatus according to claim 2.

12. The adjustment means reduces the amount of closure of the closure member as the amount of discharge in the corresponding region increases. The drying apparatus according to claim 11.

13. The system further comprises an acquisition means for acquiring information about the recording medium being transported by the transport means, The adjustment means adjusts the amount of closure of each of the plurality of closure members based on the type of recording medium among the information. The drying apparatus according to claim 2.

14. The adjustment means adjusts the closing amount of each of the plurality of opening / closing members based on the type of information and the width of the recording medium in the width direction of the recording medium intersecting the transport path. The drying apparatus according to claim 13.

15. The closing member is an opening / closing member that can rotate around a rotation axis along the width direction of the recording medium intersecting the transport path, and is configured such that the amount of closing decreases as the angle with respect to the direction along the transport path decreases. The drying apparatus according to claim 1.

16. The closing member is a shutter, one end of which is configured to be retractable at a position separated from the transport path, and the other end of which, by adjusting the amount of winding of the one end, the transport path and the recording medium intersecting the transport path in the height direction intersecting the width direction are transported. The amount of obstruction can be adjusted by moving back and forth between a position close to the path and a position away from the transport path. The drying apparatus according to claim 1.

17. The introduction section is provided on the upstream side of the transport path, The discharge section is provided on the downstream side of the transport path. The drying apparatus according to claim 1.

18. The circulation flow of the warm air in the aforementioned circulation space is In the aforementioned circulation space, on the side separated from the transport path, there is a flow from the upstream side to the downstream side of the transport path, In the aforementioned circulation space, on the side adjacent to the transport path, the flow along the transport path is from downstream to upstream, including, The drying apparatus according to claim 17.

19. The flow path section divides the circulation space into a first space separated from the transport path and a second space adjacent to the transport path, and includes a blowing plate having a plurality of holes connecting the first space and the second space. The drying apparatus according to claim 18.

20. The hot air generating unit comprises a blowing means and a heating means for heating the air blown by the blowing means. The aforementioned blowing means is provided in the first space on the upstream side of the transport path and blows air toward the downstream side of the transport path. The heating means is located in the first space on the downstream side of the conveying path of the blowing means. The drying apparatus according to claim 19.

21. A recording device that records on a recording medium, A dispensing head that dispenses liquid onto a recording medium, A drying apparatus according to claim 1, A recording device characterized by comprising the following features.

22. A transport means for transporting the recording medium from which liquid has been ejected from the recording head, A heating and blowing means comprising a blowing means and a heating means, wherein the heating and blowing means blows air heated by the heating means to the recording medium being conveyed by the conveying means, An air passage for sending the heated air blown from the heating air blowing means to the downstream side in the transport direction of the recording medium back to the heating air blowing means, A drying apparatus characterized by comprising an adjustment means for adjusting the amount of air blown from the heating and blowing means and entering the air passage.

23. The drying apparatus according to claim 22, wherein the adjusting means includes a flapper.

24. The drying apparatus according to claim 23, wherein the adjusting means adjusts the amount of air blown from the heating and blowing means and entering the air passage by the movement of the flapper.

25. The system includes a guiding means for guiding the heated air toward the recording medium, The width of the air passage is narrower than the width of the guide means and the width of the opening which is an inlet for air to enter the air passage, in a direction intersecting the transport direction of the recording medium, according to claim 22. drying equipment.

26. The drying apparatus according to claim 22, wherein the cross-sectional area of ​​the opening, which is an inlet for air to enter the air passage, is larger in proportion to the distance from the blowing means, in a direction intersecting the transport direction of the recording medium.

27. It includes an input section that allows the user to set the temperature of the heating means, The drying apparatus according to claim 22, wherein the adjustment means controls the amount of air based on the temperature set in the input unit.

28. The drying apparatus according to claim 22, wherein the heating and blowing means comprises a fan and a heater.

29. A temperature detection means is provided near the heater. The drying apparatus according to claim 28, wherein the adjustment means controls the amount of air based on the detection result of the temperature detection means.

30. A temperature detection means is provided near the aforementioned fan. The drying apparatus according to claim 28, wherein the adjustment means controls the amount of air based on the detection result of the temperature detection means.

31. A humidity detection means is provided near the heater. The drying apparatus according to claim 28, wherein the adjustment means controls the amount of air based on the detection result of the humidity detection means.

32. A humidity detection means is provided near the aforementioned fan. The drying apparatus according to claim 28, wherein the adjustment means controls the amount of air based on the detection result of the humidity detection means.

33. The drying apparatus according to claim 22, wherein a flapper is provided near the opening of the air passage toward the heating and blowing means.

34. A transport means for transporting the recording medium from which liquid has been ejected from the recording head, A heating and blowing means comprising a blowing means and a heating means, wherein the heating and blowing means blows air heated by the heating means to the recording medium being conveyed by the conveying means, An air passage for sending the heated air blown from the heating air blowing means to the downstream side in the transport direction of the recording medium back to the heating air blowing means, A recording device characterized by comprising an adjustment means for adjusting the amount of air blown from the heating and blowing means and entering the air passage.

35. A transport means for transporting the recording medium from which liquid has been ejected from the recording head, A heating and blowing means comprising a blowing means and a heating means, wherein the heating and blowing means blows air heated by the heating means to the recording medium being conveyed by the conveying means, A control method for a drying apparatus comprising: an air passage for sending the heated air blown from the heating air blowing means to the downstream side in the transport direction of the recording medium back to the heating air blowing means, A control method for a drying apparatus, characterized by comprising an adjustment step for adjusting the amount of air blown from the heating and blowing means and entering the air passage.

Images