JP2015054487A - Recording apparatus and dryer control method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a recording apparatus and a dryer control method, which are capable of quickly raising the temperature of a drying zone for drying a medium to a target temperature.SOLUTION: A recording apparatus includes a control part performing: driving an exhaust fan with a first exhaust amount while a heater is driven, after satisfying a first heating condition (at second timing t2) where a measurement temperature Tm reaches a first temperature T1 or higher, the temperature T1 being lower than a target temperature T3, by driving the heater; and driving the exhaust fan with a second exhaust amount that is larger than the first exhaust amount while the heater is driven, after satisfying a second heating condition (at third timing t3) where the measurement temperature Tm of the drying zone is heated higher than with the first heating condition.

Description

  The present invention relates to a recording apparatus that performs recording on a medium such as paper and a control method for a drying apparatus.

  2. Description of the Related Art Conventionally, ink jet printers that record characters and images by ejecting ink onto a medium such as paper have been known. Some of these printers are provided with a drying area for drying the paper on which ink has been ejected in the middle of the paper conveyance path, and are provided with a heater for heating the drying area and an intake fan for cooling (for example, Patent Document 1). In the printer as described above, the heater is turned on with the intake fan turned off to rapidly heat the drying region, and after the temperature of the drying region is raised to the target temperature, the intake fan is turned on. , Have shortened the warm-up time.

JP 2001-58398 A

However, even in the printer described above, it has not been sufficient to shorten the time required to raise the temperature of the drying region to the target temperature.
Note that such a situation is not limited to an ink jet printer, but is generally common in recording apparatuses that include a heating unit and at least one of an intake fan and an exhaust fan in order to dry a medium. ing.

  The present invention has been made in view of the above circumstances. An object of the present invention is to provide a recording apparatus capable of quickly raising a drying area for drying a medium to a target temperature, and a control method for the drying apparatus.

Hereinafter, means for solving the above-described problems and the effects thereof will be described.
A recording apparatus that solves the above problems includes a recording unit that performs recording on a medium, a drying unit that dries the medium recorded by the recording unit, a temperature measurement unit that can measure the temperature of the drying unit, and the drying unit. A heating unit that heats the unit, an exhaust unit that exhausts the atmosphere of the drying unit, and a control unit that drives and controls the heating unit and the exhaust unit based on the detection result of the temperature measurement unit, The controller drives the heating unit after satisfying a first heating condition in which the temperature of the drying unit is equal to or higher than a reference temperature lower than a target temperature of the drying unit by driving the heating unit. The exhaust unit is driven with a first exhaust amount in a state, and the heating unit is driven after satisfying a second heating condition in which the temperature is raised from the first heating condition. The second exhaust that is larger than the first exhaust amount In the drive.

  According to the above configuration, when the temperature of the drying unit is raised to the target temperature, the heating unit is first driven. Subsequently, when the first heating condition is satisfied while the heating unit is driven, the exhaust unit is driven with the exhaust amount as the first exhaust amount in order to exhaust the atmosphere of the drying unit. Then, when the second heating condition in which the temperature is raised from the first heating condition in the state where the heating unit and the exhaust unit are driven is satisfied, the exhaust unit is more than the first exhaust amount. Driven by a large second displacement. That is, in the exhaust section, the first exhaust amount for the drying section after the first heating condition is satisfied until the second heating condition is satisfied is the first exhaust amount for the drying section after the second heating condition is satisfied. 2 is smaller than the displacement. Here, the temperature increase rate of the drying unit in a state where both the heating unit and the exhaust unit are driven depends on the heating amount of the heating unit and the exhaust amount of the exhaust unit. For this reason, the temperature increase rate of the drying part after satisfy | filling 1st heating conditions until it satisfy | fills 2nd heating conditions becomes quicker than the temperature increase rate after satisfy | filling 2nd heating conditions. Therefore, according to the above configuration, the drying unit is brought to the target temperature as compared with the case where the exhaust unit is continuously driven with the second exhaust amount larger than the first exhaust amount from the time when the first heating condition is satisfied. It is possible to quickly raise the temperature.

  In the recording apparatus, when the reference temperature is the first temperature, the temperature of the drying unit is equal to or higher than the second temperature higher than the first temperature, thereby satisfying the second heating condition. It is desirable.

  According to the above configuration, not only the first heating condition but also whether or not the second heating condition is satisfied can be determined according to the detection result of the temperature measurement unit. For this reason, the control structure at the time of heating up a drying part can be simplified.

In the recording apparatus, it is preferable that the second heating condition is satisfied when a predetermined time or more elapses after the first heating condition is satisfied.
According to the above configuration, the second heating condition is determined based on whether or not a predetermined time or more obtained in advance through experiments or the like has elapsed. For this reason, it is possible to determine whether or not the second heating condition is satisfied regardless of the detection result of the temperature measurement unit, and it is possible to perform control more easily.

In the recording apparatus, the exhaust unit is preferably an exhaust fan that can exhaust the atmosphere of the drying unit.
According to the above configuration, the atmosphere in the drying section can be exhausted by discharging the atmosphere heated in the drying section by driving the exhaust fan. Further, when the medium is dried, even if moisture contained in the medium evaporates to generate air (atmosphere) containing a lot of moisture, such air can be discharged from the drying unit. For this reason, it can suppress that dew condensation arises in the member which comprises a dry part, and the inside of a recording device.

In the recording apparatus, it is preferable that the exhaust amount is changed by changing a rotation speed of the exhaust fan.
According to the above configuration, the amount of exhaust by the exhaust fan can be changed without increasing the number of exhaust fans provided in the recording apparatus. That is, since it is sufficient to control one exhaust fan, the control configuration can be simplified.

The recording apparatus preferably includes a plurality of the exhaust fans, and the exhaust amount is changed by changing a number of driving the exhaust fans.
According to the above configuration, since a target exhaust amount is obtained by a plurality of exhaust fans, each exhaust gas is compared with a case where a target exhaust amount is obtained by driving only one exhaust fan. The fan can be reduced in size. For this reason, when using the recording apparatus, it can be expected that the driving sound accompanying the driving of the exhaust fan is reduced.

  The control method of the drying apparatus that solves the above problem is based on the detection result of the temperature measurement unit that can measure the temperature of the drying region in order to raise the temperature to the target temperature that targets the drying region for drying the medium. A heating unit that heats the drying region and an exhaust unit that exhausts the atmosphere of the drying region are driven and controlled. Furthermore, in the first heating step for driving the heating unit and the first heating step, the control method satisfies the first heating condition in which the temperature is equal to or higher than a reference temperature lower than the target temperature. A second heating step in which the exhaust unit is driven with a first displacement while the heating unit is driven; and a state in which the temperature is raised above the first heating condition in the second heating step; And a third heating step of driving the exhaust unit with a second exhaust amount larger than the first exhaust amount in a state where the heating unit is driven after satisfying the second heating condition.

  According to the control method of the drying apparatus having the above-described configuration, it is possible to obtain the same effects as the effects provided by the recording apparatus described above.

1 is a perspective view of a recording apparatus according to an embodiment. FIG. 2 is a side sectional view of the recording apparatus. FIG. 2 is a block diagram showing an electrical configuration relating to a drying device provided in the recording apparatus. The flowchart explaining the processing routine performed when a control part heats up a dry area | region. (A)-(c) is a timing chart at the time of heating up a dry area | region. The flowchart explaining the processing routine of the modification performed when a control part heats up a dry area | region.

  Hereinafter, an embodiment of a recording apparatus will be described with reference to the drawings. The recording device is, for example, an ink jet printer that performs recording (printing) by ejecting ink onto a medium such as paper.

  As shown in FIG. 1, the recording apparatus 11 of the present embodiment includes a housing unit 12. An opening 13 is formed on the front side of the housing 12. Inside the housing part 12, the medium holding part 14 is accommodated in a state where it can be pulled out through the opening part 13. The medium holding unit 14 holds the roll body R in which the medium S is wound in a cylindrical shape in a rotatable state.

  An opening / closing body 15 that can be disposed at a closed position that covers the opening 13 and an open position that exposes the opening 13 is detachably attached to the casing 12. The opening / closing body 15 constitutes a part of the exterior of the recording apparatus 11 when arranged in the closed position. Further, a discharge port 16 is formed on the front surface of the housing portion 12 at a position that is vertically above the opening 13. An operation unit 17 for operating the recording device 11 is provided on the front surface of the housing unit 12. For example, a display unit (for example, a liquid crystal display) or an operation button for displaying a menu screen or the like can be arranged in the operation unit 17.

  The medium holding part 14 includes a front plate part 18 that constitutes a part of the exterior of the recording apparatus 11 when accommodated in the housing part 12, and a pair of support walls 19 that support the roll body R. In addition, the medium holding unit 14 includes a handle 20 that is recessed on the back side of the front plate 18 and an insertion port 21 through which the leading end of the medium S unrolled from the roll body R is inserted.

  As shown in FIG. 2, a recording unit 31 that performs recording on the medium S that has been unwound from the roll body R is housed above the space in which the medium holding unit 14 is housed. The recording unit 31 includes a liquid ejecting head 32 that can eject ink, which is an example of a recording material.

  In addition, the recording device 11 includes a drying device 40 that dries the recording medium S between the recording unit 31 in the housing unit 12 and the discharge port 16, and a cut sheet CP that cuts the medium S. And an exhaust device 50 that exhausts the atmosphere (air) in the housing section 12. The drying device 40 includes a heating plate 41 that transfers heat to the conveyed medium S, a heater 42 that heats the heating plate 41, and a temperature measurement unit 43 that measures the temperature of the heating plate 41. The heater 42 can be switched between a driving state in which the heating plate 41 is heated and a stopped state in which the heating plate 41 is not heated. In this respect, in the present embodiment, the heater 42 corresponds to an example of a “heating unit”. In the middle of the conveyance path of the medium S, the upper part of the heating plate 41 is a drying area (drying unit) DA for drying the medium S. Further, the temperature measurement unit 43 can indirectly measure the temperature of the dry area DA by measuring the temperature of the heating plate 41. Here, the temperature of the heating plate 41 measured by the temperature measurement unit 43 may be used as it is as the temperature of the drying region DA, or the temperature of the heating plate 41 measured by the temperature measurement unit 43 may be corrected to be the temperature of the drying region DA. Good.

  The exhaust device 50 is rotationally driven to exhaust the atmosphere in the housing unit 12 (dry area DA) to the outside of the housing unit 12 and the exhaust fan 50 when the atmosphere in the housing unit 12 is exhausted. And a vent 52 through which the atmosphere passes. The exhaust fan 51 can change the exhaust amount (rotation speed) per unit time by changing the duty ratio with respect to the exhaust fan 51. The exhaust fan 51 is provided for the purpose of exhausting air containing moisture generated in the housing 12 and the purpose of exhausting the atmosphere of the dry area DA. In this respect, in the present embodiment, the exhaust fan 51 corresponds to an example of an “exhaust unit”.

  Further, the recording apparatus 11 includes a pair of transport rollers 34, 35, 36, 37, 38, which transport the medium S while being sandwiched along the transport path of the medium S from the medium holding unit 14 toward the drying device 40. 39 is provided. By these transport roller pairs 34 to 39, the medium S unrolled from the roll body R can be transported from the insertion port 21 to the discharge port 16 along the transport path.

  As shown in FIG. 3, the recording apparatus 11 includes a control unit 60 that performs overall control of printing of the recording apparatus 11 and driving of the drying apparatus 40. The control unit 60 includes a storage unit 61 that stores various types of information. The control unit 60 is electrically connected to the heater 42, the temperature measurement unit 43, and the exhaust fan 51 described above, and drives and controls the heater 42 and the exhaust fan 51 based on the detection result of the temperature measurement unit 43. It is possible.

  By the way, in the recording apparatus 11 of the present embodiment configured as described above, after recording on the medium S, the water (solvent component) contained in the water contained in the medium S or the ink ejected onto the medium S. In order to evaporate, the medium S is dried by the drying device 40. The drying device 40 according to the present embodiment transmits heat to the medium S conveyed in the drying area DA (on the heating plate 41) to promote drying. For this reason, in the recording apparatus 11 of the present embodiment, when recording is performed on the medium S, the temperature of the drying area DA (heating plate 41) becomes a temperature required to dry the medium S. Need to be. On the other hand, immediately after the recording apparatus 11 is turned on, the temperature of the drying area DA is not the temperature required to dry the medium S, so the recording apparatus 11 is turned on. Recording cannot be started immediately after recording. That is, in order to start recording on the medium S immediately after the recording apparatus 11 is turned on, it is necessary to quickly raise the temperature of the dry area DA after the recording apparatus 11 is turned on.

  Therefore, in the recording apparatus 11 of the present embodiment, the exhaust fan is driven in a state where the heater 42 is driven in order to quickly raise the temperature of the drying area DA to the target temperature when the recording apparatus 11 is turned on. 51 was driven stepwise. In the present embodiment, the drying area DA for recording is maintained at a target temperature with both the heater 42 and the exhaust fan 51 activated.

Next, a processing routine executed by the control unit 60 of the present embodiment when raising the temperature of the drying area DA to a target temperature will be described with reference to the flowchart shown in FIG.
As shown in FIG. 4, in the present processing routine, the control unit 60 starts driving the heater 42 (step S11). Subsequently, the control unit 60 determines whether or not the measured temperature Tm of the dry area DA is equal to or higher than the first temperature T1 based on the measurement result of the temperature measuring unit 43 (step S12). Here, the first temperature (reference temperature) T1 is a determination value for changing the heating mode and the exhaust mode for the dry area DA in comparison with the measured temperature Tm. When the measured temperature Tm is lower than the first temperature T1 (step S12: NO), the control unit 60 repeatedly executes the determination process of step S12 until the measured temperature Tm becomes equal to or higher than the first temperature T1. On the other hand, when the measured temperature Tm is equal to or higher than the first temperature T1 (step S12: YES), the control unit 60 sets the first ratio X1 to the duty ratio DR of the exhaust fan 51 (step S13), and the exhaust fan 51 is driven (step S14). Thus, the exhaust fan 51 is driven according to the duty ratio DR based on the first ratio X1 set in step S13. In this respect, in the present embodiment, in step S12, the measurement temperature Tm in the dry area DA being equal to or higher than the first temperature T1 corresponds to satisfying the “first heating condition”.

  Subsequently, the control unit 60 determines whether or not the measured temperature Tm in the dry area DA is equal to or higher than the second temperature T2 (step S15). Here, the second temperature T2 is a determination value for changing the heating mode and the exhaust mode with respect to the dry region DA in comparison with the measured temperature Tm, as well as being higher than the first temperature T1. . When the measured temperature Tm is lower than the second temperature T2 (step S15: NO), the control unit 60 repeatedly executes the determination process of step S15 until the measured temperature Tm becomes equal to or higher than the second temperature T2. On the other hand, when the measured temperature Tm is equal to or higher than the second temperature T2 (step S15: YES), the control unit 60 sets the second ratio X2 larger than the first ratio X1 to the duty ratio DR of the exhaust fan 51. (Step S16). That is, when the duty ratio DR is changed from the first ratio X1 to the larger second ratio X2, the exhaust fan 51 is driven at a higher rotational speed, and more atmosphere is exhausted to the outside of the housing portion 12. By doing so, the exhaust amount with respect to the dry area DA is increased. In this respect, in the present embodiment, in step S15, the measurement temperature Tm in the dry area DA being equal to or higher than the second temperature T2 corresponds to satisfying the “second heating condition”. Then, the control unit 60 ends this processing routine.

  In the flowchart shown in FIG. 4, step S11 corresponds to an example of “first heating step”, steps S13 and S14 correspond to an example of “second heating step”, and step S16 corresponds to “third heating step”. It corresponds to an example.

  Next, referring to FIG. 5, regarding the operation of the recording apparatus 11 including the above-described drying apparatus 40, attention is paid to changes in the driving state of the heater 42 and the exhaust fan 51 when the temperature of the drying area DA is raised to the target temperature T3. To explain. In FIG. 5, as a comparative example, the manner in which the exhaust fan 51 is driven at a constant displacement to raise the temperature of the drying area DA is indicated by a broken line. Further, the measured temperature Tm in the dry area DA shown in FIG. 5A is simplified so as to change linearly for easy understanding of the explanation.

First, the state of temperature increase of the measurement temperature Tm of the drying device 40 in the present embodiment will be described.
As shown in FIG. 5A, until the first timing t1, the measured temperature Tm of the dry area DA is the room temperature T0 where the recording apparatus 11 is disposed. Further, as shown in FIGS. 5B and 5C, the heater 42 and the exhaust fan 51 are stopped until the first timing t1. Note that the duty ratio DR of the exhaust fan 51 being the zero ratio X0 means that the duty ratio DR of the exhaust fan 51 is “0 (zero)”, and the exhaust fan 51 is in a stopped state. It means that.

  Then, at the first timing t1, as shown in FIGS. 5 (a) and 5 (b), the heater 42 is driven, so that the temperature rise in the dry area DA is started and the measured temperature Tm starts to increase. Note that, after the first timing t1, the state where the heater 42 is driven is continued except when there is an explicit instruction from the user of the recording apparatus 11 or when printing (recording) is completed. On the other hand, as shown in FIG. 5C, the exhaust fan 51 is kept stopped at the first timing t1.

  Subsequently, at the second timing t2, as shown in FIG. 5A, when the measured temperature Tm in the dry area DA becomes equal to or higher than the first temperature T1, as shown in FIG. Is driven with a duty ratio DR based on the first ratio X1. Therefore, as shown in FIG. 5A, the temperature increase rate of the drying area DA from the second timing t2 to the next third timing t3 is from the first timing t1 to the second timing t2. It becomes slower than the rate of temperature increase in the drying area DA. That is, the gradient of the measured temperature Tm from the second timing t2 to the third timing t3 is gentler than the gradient of the measured temperature Tm from the first timing t1 to the second timing t2.

  This is because the heating rate of the drying area DA (gradient of the measured temperature Tm) depends on the heating amount by the heater 42, the cooling amount by exhausting the exhaust fan 51, and the heat radiation amount naturally radiated from the drying area DA. It is. That is, the measured temperature Tm has a gentle slope because the cooling amount that was “0 (zero)” until the second timing t2 becomes a value larger than “0 (zero)” when the exhaust fan 51 starts to be driven. It is because it became. In the present embodiment, increasing the exhaust amount of the exhaust fan 51 means increasing the amount of cooling by the exhaust of the exhaust fan 51. Further, in the present embodiment, the duty ratio according to the first ratio X1 is satisfied after the first heating condition is satisfied until the second heating condition is satisfied, that is, in the period from the second timing t2 to the third timing t3. The exhaust amount of the exhaust fan 51 driven at the ratio DR to the dry region DA corresponds to the “first exhaust amount”.

  Then, at the third timing t3, as shown in FIG. 5A, when the measured temperature Tm in the dry area DA is equal to or higher than the second temperature T2, the exhaust fan 51 is turned on as shown in FIG. Driven by the duty ratio DR by the second ratio X2. In the present embodiment, the duty ratio DR of the exhaust fan 51 being the second ratio X2 means that the duty ratio DR of the exhaust fan 51 is “1”, and the exhaust fan 51 is driven fully open. Means that

  Thus, as shown in FIG. 5A, the temperature increase rate of the drying area DA from the third timing t3 to the next fourth timing t4 is the drying rate from the second timing t2 to the third timing t3. It becomes slower than the temperature increase rate in the area DA. That is, the gradient of the measured temperature Tm from the third timing t3 to the fourth timing t4 is gentler than the gradient of the measured temperature Tm from the second timing t2 to the third timing t3. Further, in the present embodiment, after the second heating condition is satisfied, that is, in the period after the third timing t3, the exhaust to the dry area DA of the exhaust fan 51 driven at the duty ratio DR by the second ratio X2 is performed. The amount corresponds to the “second displacement”. Therefore, in the exhaust fan 51, the second exhaust amount is larger than the first exhaust amount.

  Subsequently, at the fourth timing t4, as shown in FIG. 5A, the measured temperature Tm in the dry area DA becomes the target temperature T3. The target temperature T3 is a temperature at which the recorded medium S can be dried, and is a target temperature when raising the temperature of the drying area DA. Thus, according to the present embodiment, the temperature increase in the dry area DA is started from the first timing t1, and the measured temperature Tm reaches the target temperature T3 at the fourth timing t4.

  Note that, after the fourth timing t4, the measured temperature Tm converges to the target temperature T3 because the heating amount by the heater 42, the cooling amount by exhausting the exhaust fan 51, and the heat radiation amount naturally radiated from the drying area DA. This is to balance the balance. Further, the amount of cooling by the exhaust fan 51 in this case is the amount of cooling by the exhaust of the exhaust fan 51 that is driven fully open by the duty ratio DR by the second ratio X2. Furthermore, the amount of heat radiated from the dry area DA is the amount of heat determined in proportion to the temperature difference between the measured temperature Tm of the dry area DA and the outside air temperature (room temperature T0) of the recording apparatus 11.

Next, how the actual temperature of the drying device in the comparative example is raised will be described.
As shown in FIGS. 5A and 5B, until the second timing t2, the heater 42 is driven as in the present embodiment, and the temperature of the drying area DA is increased. Then, at the second timing t2, as shown in FIG. 5C, the exhaust fan 51 is driven at the duty ratio DR by the second ratio X2. For this reason, as shown in FIG. 5A, the temperature increase rate of the dry area DA is slower than the temperature increase speed of the dry area DA from the second timing t2 to the third timing t3 in the present embodiment. It becomes substantially equal to the temperature increase rate of the drying area DA from the third timing t3 to the fourth timing t4. For this reason, during the period from the second timing t2 to the fifth timing t5, the measured temperature Tm of the dry area DA in the comparative example is lower than the measured temperature Tm of the dry area DA in the present embodiment. At the fifth timing t5, as shown in FIG. 5A, the measured temperature Tm in the dry area DA in the comparative example reaches the target temperature T3. Thus, according to the comparative example, the temperature increase in the dry area DA is started from the first timing t1, and the measured temperature Tm reaches the target temperature T3 at the fifth timing t5.

  As described above, in the drying apparatus 40 according to the present embodiment, the time required to raise the temperature from the room temperature T0 to the target temperature T3 is a time corresponding to the period from the first timing t1 to the fourth timing t4. On the other hand, in the drying device in the comparative example, the time required to raise the temperature from the room temperature T0 to the target temperature T3 is a time corresponding to the period from the first timing t1 to the fifth timing t5. Thus, in this embodiment, since the exhaust fan 51 is driven by the second ratio X2 after the measured temperature Tm of the dry area DA becomes equal to or higher than the second temperature T2, the measured temperature Tm of the dry area DA is the first temperature Xm. Compared to the comparative example in which the exhaust fan 51 is driven by the second ratio X2 after the temperature becomes equal to or higher than the temperature T1, the drying area DA can be quickly raised to the target temperature T3. In other words, even if the temperature increase of the drying area DA is started from the same timing (first timing t1), the temperature of the drying area DA is increased from the room temperature T0 to the target temperature T3 in the present embodiment than in the comparative example. Is shortened. Therefore, according to the recording apparatus 11 of the present embodiment, it is possible to start recording quickly, for example, immediately after the recording apparatus 11 is turned on, as compared with the comparative example.

According to the above embodiment, the following effects can be obtained.
(1) In the exhaust fan 51, the first exhaust amount with respect to the drying area DA in the period from when the first heating condition is satisfied to when the second heating condition is satisfied is the period after the second heating condition is satisfied. This is smaller than the second displacement for the dry area DA. For this reason, the temperature increase rate of the drying area DA after the first heating condition is satisfied until the second heating condition is satisfied is faster than the temperature increase rate after the second heating condition is satisfied. Therefore, the temperature of the drying area DA is quickly increased to the target temperature T3 as compared with the case where the exhaust fan 51 is continuously driven with the second exhaust amount larger than the first exhaust amount from the time when the first heating condition is satisfied. It becomes possible to make it.

  (2) Not only the first heating condition but also whether or not the second heating condition is satisfied can be determined according to the detection result of the temperature measuring unit 43. For this reason, the control structure at the time of raising the temperature of the drying area DA can be simplified.

  (3) The dry area DA can be cooled by discharging the atmosphere heated in the dry area DA by driving the exhaust fan 51. Furthermore, when the medium S is dried, even if moisture contained in the medium S or moisture in the ink jetted onto the medium S evaporates, air containing air (atmosphere) is generated. It can be discharged from the drying area DA. For this reason, it is possible to suppress the occurrence of dew condensation in the members constituting the dry area DA and in the recording apparatus 11.

  (4) By controlling to change the duty ratio DR, the exhaust amount by the exhaust fan 51 can be changed without increasing the number of exhaust fans 51 provided in the recording apparatus 11. That is, since only one exhaust fan 51 needs to be controlled, the control configuration can be simplified.

  (5) Since the second temperature T2 is lower than the target temperature T3, the timing at which the duty ratio of the exhaust fan 51 is changed from the first ratio X1 to the second ratio X2 (third timing t3). The measured temperature Tm in the drying area DA at is lower than the target temperature T3. For this reason, compared with the case where the second temperature T2 is set to be equal to or higher than the target temperature T3, when the temperature of the dry area DA is raised to the target temperature T3, the measured temperature Tm of the dry area DA may not easily exceed the target temperature T3. it can. For this reason, it can suppress that the dry area DA is heated up unnecessarily.

In addition, you may change the said embodiment as shown below.
In the above embodiment, the timing for changing the duty ratio DR of the exhaust fan 51 (timing that satisfies the second heating condition) is determined based on the measured temperature Tm of the drying area DA, but the first heating condition You may determine according to the elapsed time after satisfy | filling. That is, it is determined that the second heating condition is satisfied when the elapsed time after the measured temperature Tm in the dry area DA is equal to or higher than the first temperature T1 is equal to or longer than a predetermined time previously obtained through experiments or the like. May be. Hereinafter, a part of the processing routine executed by the control unit 60 in this case will be described with reference to a flowchart shown in FIG.

  As shown in FIG. 6, the control unit 60 drives the exhaust fan 51 with the duty ratio DR based on the first ratio X1, and then resets the count value Cnt to “0 (zero)” (step S21). Here, the count value Cnt is a value corresponding to an elapsed time after the exhaust fan 51 is driven by the duty ratio DR by the first ratio X1, that is, the measured temperature Tm in the dry area DA is the first temperature T1. This is a variable for measuring the elapsed time since the above. Then, the control unit 60 increments the count value Cnt by “1” (step S22), and determines whether the count value Cnt is equal to or greater than the count determination value Cnt_th (step S23). Here, the count determination value Cnt_th is a value corresponding to the time required to raise the temperature of the dry area DA from the first temperature T1 to the second temperature T2. Actually, by experiment or the like, the predetermined amount of time required for the temperature increase from the first temperature T1 to the second temperature T2 is obtained, and the relationship is stored in the storage unit 61. It is desirable to keep it. When determining in step S23, the control unit 60 preferably refers to the storage unit 61 to determine the count determination value Cnt_th according to a predetermined time corresponding to the above-described temperature increase amount. Incidentally, when the temperature difference between the first temperature T1 and the second temperature T2 is large, the count determination value Cnt_th is larger than when the temperature difference is small.

  If the count value Cnt is less than the count determination value Cnt_th (step S23: NO), the control unit 60 proceeds to step S22. On the other hand, when the count value Cnt is greater than or equal to the count determination value Cnt_th (step S23: YES), the control unit 60 sets the second ratio X2 to the duty ratio DR of the exhaust fan 51 (step S16), and this processing routine. Exit. In this respect, in this modification, the count value Cnt being equal to or greater than the count determination value Cnt_th in step S23 corresponds to satisfying the “second heating condition”. In other words, the elapsed time after satisfying the first heating condition being equal to or longer than the predetermined time corresponds to satisfying the second heating condition.

  As described above, the effects (1), (3), and (3) of the above embodiment can also be obtained by measuring the elapsed time based on the count value Cnt after the measured temperature Tm of the dry area DA is equal to or higher than the first temperature T1. (4) can be obtained. Further, regardless of the detection result of the temperature measurement unit 43, it can be determined whether or not the second heating condition is satisfied, and control can be performed more easily. Incidentally, the predetermined time corresponding to the count determination value Cnt_th corresponds to a period from the second timing t2 to the third timing t3 in FIG. 5A.

  The exhaust fan 51 may be an exhaust fan 51 that can only switch between a start state and a stop state. In this case, it is desirable that a plurality of exhaust fans 51 are provided. For example, when two exhaust fans 51 are provided, one exhaust fan 51 is driven until the second temperature condition is satisfied after the first temperature condition is satisfied, and the second temperature condition is satisfied. After that, by driving the two exhaust fans 51, the effect of the above embodiment can be obtained. Further, since the target exhaust amount (for example, the second exhaust amount) is obtained by the plurality of exhaust fans 51, the target exhaust amount (for example, the second exhaust amount) is driven by driving one exhaust fan 51. Each exhaust fan 51 can be reduced in size as compared with the case of obtaining the exhaust amount). For this reason, when the recording apparatus 11 is used, it can be expected that the driving sound accompanying the driving of the exhaust fan 51 is reduced.

  -By changing the duty ratio DR of the exhaust fan 51, the exhaust amount is not changed, but the exhaust voltage is changed by directly changing the voltage applied to the exhaust fan 51 or the flowing current amount. Good.

  When the exhaust fan 51 becomes equal to or higher than a third temperature that is higher than the second temperature T2 and lower than the target temperature T3, the exhaust fan 51 is driven by the duty ratio DR based on the third ratio that is larger than the second ratio X2. 51 may be driven. That is, the exhaust fan 51 may be driven in three stages (first ratio X1, second ratio X2, and third ratio) according to the measured temperature Tm. Further, according to the measured temperature Tm, the exhaust fan 51 may be driven in four steps or more, or may be driven in a stepless manner.

  The second temperature T2 may be higher than the target temperature T3. In this case, when the measured temperature Tm becomes equal to or higher than the second temperature T2, the measured temperature Tm decreases toward the target temperature T3 by driving the exhaust fan 51 with the duty ratio DR based on the second ratio X2. become.

  In place of the exhaust fan 51, an intake fan may be provided. These fans can also be used for cooling. However, in the case of cooling, a duct is arranged in the casing 12 instead of the fan, and the cooling water is passed through the duct so that the drying area DA can be used. Cooling may be performed. In this case, the cooling amount may be changed depending on the temperature and flow rate of the cooling water.

  The first temperature T1 and the second temperature T2 may be changed according to the room temperature T0 where the recording apparatus 11 is disposed. Further, the first ratio X1 and the second ratio X2 may be changed accordingly.

The temperature measuring unit 43 may measure the atmospheric temperature in the dry area DA. In this case, the control unit 60 may control the exhaust fan 51 based on the same ambient temperature.
A drying device 40 (drying area DA) may be provided on the upstream side of the recording unit 31 in the transport path. In this case, the drying device 40 may be used to heat the medium S in advance before the ink is ejected, instead of drying the ink ejected onto the medium S.

The recording apparatus 11 may be a recording apparatus that conveys and records a cut sheet.
The medium S is not limited to paper, but may be a plastic film, a thin plate, or the like, or may be a fabric used in a printing apparatus.

  The recording device 11 is not limited to a printer that performs recording by ejecting a fluid such as ink, and may be a non-impact printer such as a laser printer, an LED printer, a thermal transfer printer (including a sublimation printer), or a dot impact. An impact printer such as a printer may be used.

  DESCRIPTION OF SYMBOLS 11 ... Recording device, 12 ... Housing | casing part, 31 ... Recording part, 40 ... Drying device, 41 ... Heating plate, 42 ... Heater (an example of a heating part), 43 ... Temperature measuring part, 50 ... Exhaust device, 51 ... Exhaust Fan (an example of an exhaust unit), 60 ... a control unit, 61 ... a storage unit, DA ... a drying region (an example of a drying unit), DR ... a duty ratio, T0 ... room temperature, T1 ... a first temperature (an example of a reference temperature) , T2 ... second temperature, T3 ... target temperature, Tm ... measurement temperature (an example of temperature measured by the temperature measurement unit), S ... medium, S11 ... first heating step, S13, S14 ... second heating step, S16 ... 3rd heating step.

Claims (7)

A recording unit for recording on a medium;
A drying unit for drying the medium recorded by the recording unit;
A temperature measuring unit capable of measuring the temperature of the drying unit;
A heating unit for heating the drying unit;
An exhaust part for exhausting the atmosphere of the drying part;
A control unit that drives and controls the heating unit and the exhaust unit based on the detection result of the temperature measurement unit;
The controller is
The exhaust unit is driven in a state where the heating unit is driven after satisfying a first heating condition in which the temperature of the drying unit is equal to or higher than a reference temperature lower than a target temperature of the drying unit by driving the heating unit. With a first displacement,
After satisfying the second heating condition in which the temperature is raised than the first heating condition, the exhaust part is made larger than the first exhaust amount in a state where the heating part is driven. 2. A recording apparatus that is driven with a displacement of 2. When the reference temperature is the first temperature,
The recording apparatus according to claim 1, wherein the second heating condition is satisfied when a temperature of the drying unit is equal to or higher than a second temperature higher than the first temperature.   The recording apparatus according to claim 1, wherein the second heating condition is satisfied when a predetermined time or more elapses after the first heating condition is satisfied.   The recording apparatus according to claim 1, wherein the exhaust unit is an exhaust fan that can exhaust the atmosphere of the drying unit.   The recording apparatus according to claim 4, wherein the exhaust amount is changed by changing a rotational speed of the exhaust fan. A plurality of exhaust fans;
The recording apparatus according to claim 4, wherein the exhaust amount is changed by changing a number of driving of the exhaust fan. A heating unit for heating the drying region and the drying region based on a detection result of a temperature measurement unit capable of measuring the temperature of the drying region in order to raise the temperature to the target temperature for the drying region for drying the medium A control method of a drying device that drives and controls an exhaust unit that exhausts the atmosphere of
A first heating step for driving the heating unit;
In the first heating step, after satisfying a first heating condition in which the temperature is equal to or higher than a reference temperature lower than the target temperature, the exhaust unit is driven with a first displacement while the heating unit is driven. A second heating step,
In the second heating step, after satisfying a second heating condition in which the temperature is raised from the first heating condition, the exhaust unit is moved in the state where the heating unit is driven. And a third heating step that is driven by a second displacement greater than the displacement of the drying apparatus.