Patent Publication Number: US-10766268-B2

Title: Filter unit, light source unit, printer

Description:
BACKGROUND 
     1. Technical Field 
     The present invention relates to a filter unit, a light source unit, and a printer. 
     2. Related Art 
     In the related art, an ultraviolet irradiation unit including an ultraviolet irradiation part and a fan for cooling the ultraviolet irradiation part has been known. Further, the above-described ultraviolet irradiation unit is provided with a filter for trapping ink mists (for example, see JP-A-2014-188927). 
     In the above-described ultraviolet irradiation unit, when the filter is clogged, cooling efficiency of the ultraviolet irradiation part lowers, and the ultraviolet irradiation part deteriorates, thus the filter needs to be replaced at an appropriate time. 
     However, for the above-described ultraviolet irradiation unit, there has been a problem that it is not possible to easily grasp when to replace the filter. 
     SUMMARY 
     A filter unit according to an aspect of the present application is a filter unit disposed in a printer including a control unit, the filter unit including a filter configured to trap a foreign material, a frame configured to hold the filter, and a storage element provided on the frame and capable of transmitting/receiving information about the filter to and from the control unit. 
     In the above-described filter unit, the frame is preferably formed in a rectangular shape, and the filter and the storage element are preferably disposed in parallel along a short-side direction. 
     In the above-described filter unit, a coupling portion electrically coupled to the storage element, and configured to be electrically coupled to the control unit, is preferably disposed at a central portion in a long-side direction of the frame. 
     A light source unit according to an aspect of the present application is a light source unit disposed in a printer including a control unit, the light source unit including a housing, a light source disposed in the housing and configured to radiate an ultraviolet ray, a driving circuit configured to drive the light source, a temperature detecting element configured to measure an ambient temperature of the light source, and a storage element capable of transmitting/receiving information about the light source to and from the control unit. The housing includes an inlet configured to take in outside air and an outlet configured to discharge outside air taken in, and the storage element is disposed closer to the inlet than to the light source. 
     In the above-described light source unit, the temperature detecting element is preferably disposed closer to the outlet than to the light source. 
     A printer according to an aspect of the present application includes the above-described filter unit or the above-described light source unit. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
       The invention will be described with reference to the accompanying drawings, wherein like numbers reference like elements. 
         FIG. 1  is a schematic view illustrating a configuration of a printer according to First Exemplary Embodiment. 
         FIG. 2  is a perspective view illustrating a configuration of a printing unit according to First Exemplary Embodiment. 
         FIG. 3  is a cross sectional view illustrating a configuration of an ultraviolet irradiation unit according to First Exemplary Embodiment. 
         FIG. 4  is a plan view illustrating a configuration of a filter unit according to First Exemplary Embodiment. 
         FIG. 5  is a side view illustrating the configuration of the filter unit according to First Exemplary Embodiment. 
         FIG. 6  is an explanatory view illustrating an installation method of the filter unit according to First Exemplary Embodiment. 
         FIG. 7  is an explanatory view illustrating the installation method of the filter unit according to First Exemplary Embodiment. 
         FIG. 8  is a block diagram illustrating a configuration of a control unit according to First Exemplary Embodiment. 
         FIG. 9  is a schematic view illustrating a configuration of an ultraviolet irradiation unit (light source unit) according to Second Exemplary Embodiment. 
         FIG. 10  is a block diagram illustrating a configuration of a control unit according to Second Exemplary Embodiment. 
         FIG. 11  is a plan view illustrating a configuration of a filter unit according to Modified Example 1. 
         FIG. 12  is a plan view illustrating a configuration of a filter unit according to Modified Example 2. 
         FIG. 13  is a perspective view illustrating a configuration of an ultraviolet irradiation unit according to Modified Example 3. 
     
    
    
     DESCRIPTION OF EXEMPLARY EMBODIMENTS 
     Exemplary embodiments of the invention will be described below with reference to the drawings. Note that, in each of the figures below, to illustrate each of members and the like in a recognizable size, each of the members and the like is illustrated to a scale different from an actual scale. 
     First Exemplary Embodiment 
     Firstly, a configuration of a printer will be described. The printer is, for example, an ink jet-type printer. Note that, in the description of the exemplary embodiment, a large format printer (LFP) configured to handle a relatively large medium will be used as an example of the configuration of the printer. 
       FIG. 1  is a schematic view (partial side sectional view) illustrating a configuration of the printer. As illustrated in  FIG. 1 , a printer  1  includes a conveying unit  2  for transporting a medium M, and a printing unit  3  including a recording head  31  capable of discharging (ejecting) ink as droplets as an example of liquid toward the medium M. Further, a tension adjustment unit  50  capable of applying tension on the medium M by contacting the medium M is included. Additionally, a control unit  14  for controlling the conveying unit  2 , the printing unit  3 , and the like are included. Additionally, the printer  1  includes operation panel units such as an operating unit for a user to instruct driving of each constitutional component and a display panel for checking a driving state. 
     Note that, these constitutional components are supported by a main body frame  10  disposed in a substantially vertical direction. Further, the main body frame  10  is coupled to a base unit  11  supporting the main body frame  10 . 
     The conveying unit  2  transports the medium M in a transport direction (an outlined arrow direction in the figure). In the exemplary embodiment, the medium M is transported with a roll-to-roll method. The conveying unit  2  includes a roll unit  21  for delivering the medium M having a roll shape in the transport direction, and a roll unit (reel unit)  22  capable of winding the delivered medium M. 
     On a downstream side in the transport direction of the medium M with respect to the roll unit  21 , a first transport guide unit  4  including a first support face S supporting the medium M, a second transport guide unit  5  provided on the downstream side in the transport direction of the medium M with respect to the first transport guide unit  4  and including a second support face (platen)  5   a  supporting the medium M, and further, a third transport guide unit  6  provided on the downstream side in the transport direction of the medium M with respect to the second transport guide unit  5  and including a third support face  6   a  supporting the medium M are included. Additionally, the medium M delivered from the roll unit  21  is transported to the roll unit  22 , via the first transport guide unit  4 , the second transport guide unit  5 , and the third transport guide unit  6 . Further, the second support face  5   a  of the second transport guide unit  5  is disposed to face the recording head  31 . That is, the second support face  5   a  is disposed to be capable of supporting the medium M in a discharging area E in which ink is discharged from the recording head  31  (printing unit  3 ). 
     Additionally, a transport path of the medium M between the first transport guide unit  4  and the second transport guide unit  5  is provided with a pair of transport rollers  23  for transporting the medium M. The pair of transport rollers  23  includes a first roller  23   a  and a second roller  23   b  disposed below the first roller  23   a . The first roller  23   a  is a driven roller, and the second roller  23   b  is a driving roller. 
     The first transport guide unit  4  is disposed with a heater  171  capable of heating the medium M. The heater  171  in the exemplary embodiment is disposed on a surface (back surface) side on an opposite side to the first support face S of the first transport guide unit  4 . The heater  171  is, for example, a tube heater, and is attached to the back surface of the first transport guide unit  4  by aluminum tape or the like. Additionally, by driving the heater  171 , the first support face S supporting the medium M in the first transport guide unit  4  is heated by heat conduction, and the medium M can be heated from a back side of the medium M. Note that, similarly, the second transport guide unit  5  is disposed with a heater  172  on a surface (back surface) side on an opposite side to the second support face  5   a  of the second transport guide unit  5 . A configuration of the heater  172  is identical to a configuration of the heater  171 . Similarly, the third transport guide unit  6  is disposed with a heater  173  on a surface (back surface) side on an opposite side to the third support face  6   a  of the third transport guide unit  6 . A configuration of the heater  173  is similar to the configuration of the heater  171 . 
     Note that the heaters  171 ,  172 , and  173  may be omitted. Further, although respective installation locations of the heaters  171 ,  172 , and  173  are arranged on the surface (back surface) side on the opposite side to the first support face S, the surface (back surface) side on the opposite side to the second support face  5   a , and the surface (back surface) side on the opposite side to the third support face  6   a  of the third transport guide unit  6 , the invention is not limited thereto, and, for example, the respective locations may be arranged on the first support face S side, the second support face  5   a  side, or the third support face  6   a  side, and may have a configuration capable of heating a printed face of the medium M. 
     The printing unit  3  records (prints) images, characters, and the like on the medium M. Specifically, the printing unit  3  includes the recording head (ink jet head)  31  capable of discharging ink as droplets to the medium M, and a carriage  32  mounted with the recording head  31  and capable of freely reciprocating in a width direction (X axis direction) of the medium M. Additionally, the printer  1  includes a frame body  39 , and the recording head  31  and the carriage  32  are disposed inside the frame body  39 . 
     The recording head  31  includes a nozzle capable of discharging droplets, and can make the nozzle discharge ink as droplets, by driving a piezoelectric element as a driving element. Accordingly, images and the like can be recorded on the medium M. Additionally, in the discharging area E, a pressing unit (not illustrated) for pressing the medium M supported by the second support face  5   a  from above to the second support face  5   a  side is included, and in a state where lifting or the like of the medium M on the second support face  5   a  is suppressed, the recording head  31  is made to discharge droplets. This makes it possible to land the droplets on an accurate location, and to improve image quality. 
     Note that, as the ink according to the exemplary embodiment, an ultraviolet cure type ink that is promoted to cure by irradiation with ultraviolet is used as an example for explanation. 
     The printing unit  3  includes an ultraviolet irradiation unit  154 . The ultraviolet irradiation unit  154  includes an ultraviolet irradiation part  101  (see  FIG. 3 ) for radiating ultraviolet rays, and can promote curing of the ultraviolet cure type ink applied on the medium M, by the ultraviolet rays emitted from the ultraviolet irradiation part  101 . Note that, a detailed configuration of the printing unit  3  including the ultraviolet irradiation unit  154  will be described later. 
     Additionally, a configuration of the recording head  31  is not limited to the above-described configuration. As a means for generating a pressure, for example, a so-called electrostatic type actuator or the like configured to generate static electricity between a vibration plate and an electrode to deform the vibration plate by electrostatic force, and to cause nozzles to discharge droplets may be used. Further, the configuration may include a droplet discharging head configured to use a heating element to generate bubbles in nozzles, and to cause the nozzles to discharge ink as droplets by the bubbles. 
     The tension adjustment unit  50  can apply tension on the medium M. The tension adjustment unit  50  in the exemplary embodiment is disposed to be capable of applying the tension on the medium M between the third transport guide unit  6  and the roll unit  22 . The tension adjustment unit  50  includes a pair of frame units  54 , and is configured to be capable of rotating around a rotation shaft  53 . Additionally, a tension bar  55  is disposed between respective one ends of the pair of frame units  54 . The tension bar  55  is formed to be longer in a width direction (X axis direction) than a width dimension of the medium M. Additionally, part of the tension bar  55  is configured to contact the medium M and to apply the tension on the medium M. On the other hand, a weight unit  52  is disposed between respective other ends of the pair of frame units  54 . Accordingly, by rotating the tension adjustment unit  50  around the rotation shaft  53 , a location of the tension adjustment unit  50  can be displaced. 
     Next, a configuration of the printing unit will be described.  FIG. 2  is a perspective view illustrating a configuration of the printing unit. 
     As illustrated in  FIG. 2 , the printing unit  3  includes the carriage  32  facing the medium M, an X axis moving unit  132  supporting the carriage  32  at a back side and moving the carriage  32  in the X axis direction, and a horizontal frame  133  supporting the X axis moving unit  132 . The horizontal frame  133  extends in the X axis direction. 
     The X axis moving unit  132  includes a pair of upper and lower guide shafts  61  supported by the horizontal frame  133  and supporting the carriage  32  such that the carriage  32  can freely reciprocate in the X axis direction, an X axis driving mechanism  62  directly driving the carriage  32  along the pair of guide shafts  61 , and an X axis detection mechanism  67  detecting a movement location of the carriage  32  in the X axis direction. 
     The X axis driving mechanism  62  includes a timing belt  63  extending in the X axis direction along the pair of guide shafts  61 , a driving pulley  66  and a driven pulley  64  that bridge the timing belt  63 , a coupling and fixing unit (not illustrated) coupling the timing belt  63  and the carriage  32 , and a carriage motor  65  driving the driving pulley  66 . The X axis moving unit  132  rotates the carriage motor  65  forward/backward, to reciprocate the carriage  32  in the X axis direction on the pair of guide shafts  61  via the timing belt  63 . 
     The X axis detection mechanism  67  includes a linear scale  71  provided along the X axis direction, and a detector (not illustrated), fixed on the carriage  32 , that reads scale marks of the linear scale  71  and detects the movement location of the carriage  32 . 
     An end portion in a −Z axis direction of the carriage  32  is disposed with the recording head  31 . Additionally, each of both end portions in the X axis direction of the carriage  32  is disposed with the ultraviolet irradiation unit  154 . Accordingly, together with movement of the carriage  32 , the recording head  31  and the ultraviolet irradiation unit  154  move as well. 
     Next, a configuration of the ultraviolet irradiation unit will be described.  FIG. 3  is a cross-sectional view illustrating a configuration of the ultraviolet irradiation unit. 
     As illustrated in  FIG. 3 , each ultraviolet irradiation unit  154  includes an irradiation unit body  91 , and a mounting member  92  disposed on a back side of the irradiation unit body  91  and mounted on the irradiation unit body  91  on the pair of guide shafts  61  such that the irradiation unit body  91  can freely slide. 
     The irradiation unit body  91  includes the ultraviolet irradiation part (electromagnetic wave irradiation unit)  101  facing the medium M, a fin type heatsink  102  disposed on an upper portion of the ultraviolet irradiation part  101  and cooling the ultraviolet irradiation part  101 , a cooling fan  103  disposed on an upper side of the heatsink  102  and generating an airflow passing through the heatsink  102 , and an inlet  104  and an outlet  105  disposed on an upper portion and on a lower front side for air intake and exhaust, respectively. The ultraviolet irradiation part  101  is configured with a plurality of ultraviolet irradiation LEDs radiating ultraviolet rays (electromagnetic waves), and is disposed on a lower portion of the irradiation unit body  91  and facing downward. Each ultraviolet irradiation unit  154  uses the ultraviolet irradiation part  101 , radiating an ultraviolet cure type ink discharged on the medium M by the recording head  31  with ultraviolet rays, to cure (fix) the ultraviolet cure type ink. 
     Additionally, the irradiation unit body  91  includes a filter unit  206  disposed on the inlet  104  and including a filter  106  trapping ink mists, and an ink storage unit  107  fronting (facing) a lower end portion of the filter  106 . The filter unit  206  is disposed above a housing  120  dividing the ultraviolet irradiation unit  154 . The irradiation unit body  91  is formed with an inner flow path communicating the inlet  104  with the outlet  105 , and the inlet  104  and the filter  106 , the fan  103 , the heatsink  102 , and the outlet  105  are disposed in this order from an upstream side. By driving the fan  103 , an atmosphere containing ink mists is taken in from the inlet  104 , and exhausted from the outlet  105  through the filter  106  and the heatsink  102 . As described above, the ultraviolet irradiation unit  154  functions as a mist collecting unit that takes in an atmosphere around the recording head  31 , traps the ink mists, and exhausts the atmosphere. Note that, these ink mists are generated along with ink discharging by the recording head  31 . 
     The inlet  104  is disposed on an upper portion of the irradiation unit body  91 , and also is disposed facing upward and forward, that is, obliquely upward. That is, the inlet  104  is disposed to be inclined with respect to a horizontal plane. On the other hand, the outlet  105  is disposed on a lower front side of the irradiation unit body  91 , and also is disposed facing forward. 
     The filter  106  is disposed on the inlet  104 , and is disposed facing obliquely upward according to the inlet  104 . Additionally, the filter  106  extends forward to a portion directly above the ink storage unit  107 . 
     The ink storage unit  107  is disposed to face a lower end portion of the filter  106 . The ink storage unit  107  includes a storage container  111  for receiving and storing ink discharged from the lower end portion of the filter  106 , and an absorber  112  filled in the storage container  111 . As the filter  106  traps ink mists and ink is collected on the filter  106 , the collected ink is gathered to the lower end portion of the filter  106 , and subsequently reaches the ink storage unit  107  and is stored. 
     Next, a configuration of the filter unit will be described.  FIG. 4  is a plan view illustrating a configuration of the filter unit, and  FIG. 5  is a side view illustrating the configuration of the filter unit. 
     As illustrated in  FIG. 4  and  FIG. 5 , the filter unit  206  includes the filter  106  for trapping foreign materials such as ink mists, and a frame  207  for holding the filter  106 . As the filter  106 , non-woven fabric, glass wool, rock wool, or the like can be used. Further, metal woven wire nettings may be used. 
     Additionally, the frame  207  is provided with a substrate  301  mounted with a storage element  310 . The frame  207  and the substrate  301  may be bonded to each other with an adhesive or the like, or may be coupled to each other with a fixing tool such as a screw. The storage element  310  stores information about the filter  106 , and is configured to be capable of transmitting/receiving the information about the filter  106  to and from the control unit  14 . 
     As the information about the filter  106  stored in the storage element  310 , for example, a component name, a manufacturing part number, a grade (e.g., mesh-size), a manufacturing division, a manufacturing number, and the like, are recorded. Additionally, history information such as an installation date, operation time (installation time of the filter  106 ), or the like of the filter  106  is recorded and updated between the control unit  14  and the storage element  310 . 
     The frame  207  in the exemplary embodiment has a rectangular outer shape. The frame  207  is formed of a resin material, a metal material, or the like, for example. Additionally, the filter  106  and the storage element  310  are arranged in parallel along a short-side direction (the X axis direction) of the frame  207 . Accordingly, the filter  106  and the storage element  310  (substrate  301 ) can be efficiently disposed on the frame  207 . 
     On the substrate  301 , lands  315  (e.g., lands  315   a ,  315   b  in the exemplary embodiment) electrically coupled to the storage element  310  via conducting wires  313  (conducting wires  313   a ,  313   b  in the exemplary embodiment) and configured to be electrically coupled to the control unit  14  are disposed. The lands  315  are made of metal. The lands  315  in the exemplary embodiment are disposed at a central portion in a long-side direction (Y axis direction) of the frame  207 . 
     Additionally, both end portions of the frame  207  are provided with plate-shaped supporting bodies  211  supporting the frame  207 , respectively. In the exemplary embodiment, the supporting bodies  211  are disposed on both of the end portions in the short-side direction (X axis direction) of the frame  207 , respectively. Additionally, the frame  207  is coupled to a central portion in a Z axis direction of the supporting body  211  (see  FIG. 5 ). 
     Further, the frame  207  is formed with locating grooves  222   a ,  222   b  and a locating hole  224  such that the frame  207  is coupled to a body side (housing  120 ) of the ultraviolet irradiation unit  154  at precise locations. The locating grooves  222   a ,  222   b  are formed on end portions in the Y axis direction of the frame  207 , respectively. Additionally, the locating hole  224  is provided on the central portion in the Y axis direction of the frame  207 . Note that, the locating hole  224  is a through-hole penetrating the frame  207  and the substrate  301 . In the exemplary embodiment, the locating grooves  222   a ,  222   b  and the locating hole  224  are disposed substantially in a straight line along the Y axis direction of the frame  207 . 
     Next, an installation method of the filter unit will be described. Specifically, an installation method of the filter unit in the ultraviolet irradiation unit will be described.  FIG. 6  is a plan view illustrating the installation method of the filter unit, and  FIG. 7  is a side view illustrating the installation method of the filter unit. 
     As illustrated in  FIG. 6  and  FIG. 7 , the filter unit  206  is installed above the housing  120  dividing the ultraviolet irradiation unit  154 . On an upper part of the housing  120 , a locating pin  121   a  corresponding to the locating groove  222   a  of the filter unit  206 , a locating pin  121   b  corresponding to the locating groove  222   b , and a locating pin  122  corresponding to the locating hole  224  are installed. Further, on the upper part of the housing  120 , recessed portions  123 , in which the respective supporting bodies  211  of the filter unit  206  are inserted, are provided. 
     Further, on the upper part of the housing  120 , a coupling portion  125  electrically coupled to the lands  315  of the filter unit  206  is provided. Additionally, the coupling portion  125  is disposed with contact point portions  126  (contact point portions  126   a ,  126   b  in the exemplary embodiment) that can contact the respective lands  315  ( 315   a ,  315   b ). The contact point portions  126  are electrically coupled to the control unit  14  via coupling wiring (not illustrated). 
     Further, the filter unit  206  is disposed on the housing  120  such that the lands  315  of the filter unit  206  face the housing  120 , that is, in a state where the substrate  301  of the filter unit  206  faces the −Z axis direction. Accordingly, the locating pin  121   a  is fitted in the locating groove  222   a , the locating pin  121   b  is fitted in the locating groove  222   b , and the locating pin  122  is fitted in the locating hole  224 . Further, the respective supporting bodies  211  are inserted in the recessed portions  123 . Here, a Z axis direction location of the frame  207  is defined by a depth dimension of the recessed portion  123  in the Z axis direction in which the supporting body  211  is inserted. In the exemplary embodiment, the depth dimension of the recessed portion  123  in the Z axis direction is shorter (smaller) than a dimension from an end portion of the supporting body  211  in the Z axis direction to one surface of the frame  207 . Accordingly, when the filter unit  206  is mounted on the housing  120 , as illustrated in  FIG. 7 , the filter  106  does not contact the housing  120 , and a space is formed between the filter  106  and the housing  120 . Thus, for example, even when foreign materials such as ink mists attach to the housing  120 , since the housing  120  does not contact the filter  106 , attachment of the foreign materials to the filter  106  can be prevented. 
     Additionally, the land  315   a  contacts the contact point portion  126   a , and the land  315   b  contacts the contact point portion  126   b . Accordingly, the storage element  310  is electrically coupled to the control unit  14 , and transmission/reception of the information about the filter  106  between the storage element  310  and the control unit  14  is enabled. 
     Additionally, since the lands  315   a ,  315   b  are disposed at a center in the long-side direction of the frame  207 , by rotating the frame  207  by 180 degrees in a plan view, installation is possible on any one of the ultraviolet irradiation units  154  disposed in the X axis direction of the carriage  32 . 
     Note that, the disposition locations of the lands  315  are not limited to the center in the long-side direction of the frame  207 , and the lands  315  may be disposed line-symmetrically. Even with this configuration, similar handling as described above is possible. 
     Additionally, when the filter unit  206  is mounted on the housing  120 , the substrate  301  and the housing  120  face each other. Thus, the substrate  301  is hidden by the frame  207 , and it is not possible to visually recognize the substrate  301  by appearance. Accordingly, mistaken contact with the substrate  301  (including the storage element  310 , the lands  315 , and the like) by a user is prevented, and thus coupling between the land  315   a  and the contact point portion  126   a  can be maintained. 
     Next, a configuration of the control unit will be described.  FIG. 8  is a block diagram illustrating a configuration of the control unit. As illustrated in  FIG. 8 , the control unit  14  is coupled to the conveying unit  2 , the printing unit  3 , and the operation panel unit. The control unit  14  includes a Central Processing Unit (CPU) for executing various programs, a Random Access Memory (RAM) for temporarily storing data, programs, and the like, a Read Only Memory (ROM) in which various data, various programs, and the like are recorded in advance in a non-volatile manner, and an interface. Additionally, the CPU processes various signals inputted via the interface based on data in the RAM and the ROM, and outputs control signals to each unit via the interface. The control unit  14  receives operational information about user operations from the operation panel unit, and receives a detection result (movement location) from a detector of the X axis moving unit  132 . On the other hand, the control unit  14  controls the carriage motor  65  of the X axis moving unit  132 , the recording head  31 , the ultraviolet irradiation part  101  and the fan  103  of each ultraviolet irradiation unit  154 , and a driving motor of the conveying unit  2 , to perform a recording operation (liquid discharging operation). 
     In the recording operation, the control unit  14  uses the conveying unit  2  to move the medium M intermittently. Additionally, at each stop time during the intermittent movement of the conveying unit  2 , while the ultraviolet irradiation part  101  emits ultraviolet rays, the X axis moving unit  132  is used to move the recording head  31  (carriage  32 ) in the X axis direction, and the recording head  31  is made to discharge ink (recording process). Accordingly, a desired image is recorded on the medium M. At this time, in a state where each fan  103  is driven, the pair of ultraviolet irradiation units  154  reciprocates in the X axis direction together with the recording head  31  (carriage  32 ), thus the pair of ultraviolet irradiation units  154  collects ink mists in an entire region in the X axis direction in the frame body  39  covering the printing unit  3 . That is, a mist collection operation (air intake and exhaust operation) is performed together with the recording operation in this configuration. 
     Here, the storage element  310  installed on the filter unit  206  of each ultraviolet irradiation unit  154  is coupled to the control unit  14 . The control unit  14  reads information about the filter  106  (the component name, the manufacturing part number, the grade (e.g., mesh-size), the manufacturing division, the manufacturing number, and the like), recorded in the storage element  310  in advance, and displays the read information on the operation panel. Accordingly, whether the filter  106  supports the ink discharged from the recording head  31  can be checked. Additionally, for example, when the filter  106  does not support the ink discharged from the recording head  31 , the filter  106  is replaced by a filter  106  that is adequate before the recording operation. This makes it possible to improve collection efficiency of the ink mists, enhance cooling efficiency of the ultraviolet irradiation part  101 , and prevent deterioration of the ultraviolet irradiation part  101 . 
     Further, the control unit  14 , when the recording operation starts, periodically writes a cumulated time of recording operation time to the storage element  310 . That is, the fan  103  is driven, and collection time of the ink mists by the filter  106  is cumulated. Then, for example, when a preset cumulated time of the recording operation (replacement time) is reached, the operation panel is made to display an instruction to replace the filter  106 . Subsequently, a user, after considering a situation of the recording operation, stops driving the conveying unit  2  and the printing unit  3 , and replaces the filter  106 . Note that, the replacement time of the filter  106  may be indicated by a warning sound or a warning light, other than by displaying on the operation panel. Additionally, an LED may be disposed on the substrate  301 , and when the preset cumulated time of the recording operation (replacement time) is reached, the LED may be turned on. 
     According to the exemplary embodiment, the following advantages can be obtained. 
     It is easy to acquire the information about the filter  106  via the storage element  310  coupled to the filter unit  206 . Additionally, by acquiring the cumulated time that the filter  106  is used, when the predetermined cumulated time is reached, the filter  106  can be replaced. Accordingly, it is possible to easily grasp when to replace the filter  106 . Accordingly, it is possible to maintain the cooling efficiency of the ultraviolet irradiation part  101 , and prevent deterioration of the ultraviolet irradiation part  101 . 
     Additionally, also when the filter  106  once used is used for another printer  1 , a history of the filter  106  is stored in the storage element  310 , and thus a user can easily check the information about the filter  106 . 
     By mounting such a filter unit  206  in the printer  1 , the printer  1  with high reliability can be provided. 
     Second Exemplary Embodiment 
     Next, Second Exemplary Embodiment will be described. In the above-described First Exemplary Embodiment, the embodiment in which the storage element  310  is installed on the filter unit  206  of the ultraviolet irradiation unit  154  was described, but in the exemplary embodiment, an embodiment in which the storage element  310  is installed on the ultraviolet irradiation part  101  will be described. Note that, a basic configuration of the printer  1  is identical, thus a description thereof will be omitted. Additionally, an identical configuration to that in First Exemplary Embodiment will be given an identical reference numeral and detailed description will be omitted. 
       FIG. 9  is a schematic view illustrating a configuration of an ultraviolet irradiation unit (light source unit) according to the exemplary embodiment. As illustrated in  FIG. 9 , an ultraviolet irradiation unit  154   a  includes the ultraviolet irradiation part  101  (light source). The ultraviolet irradiation part  101  is driven and controlled by the control unit  14  via a driving circuit. The heatsink  102  is provided on an upper portion of the ultraviolet irradiation part  101 . 
     In the exemplary embodiment, the ultraviolet irradiation part  101  and the heatsink  102  are configured as one unit. Additionally, the ultraviolet irradiation part  101  and the heatsink  102  that are unitized are removably configured inside the housing  120  via an opening of the outlet  105 . The ultraviolet irradiation part  101  and the heatsink  102  are removable by a slide mechanism with respect to the housing  120 . 
     Additionally, the substrate  301  mounted with the storage element  310  is disposed on the upper portion of the ultraviolet irradiation part  101 . The storage element  310  stores information about the ultraviolet irradiation part  101 , and is configured to be capable of transmitting/receiving the information about the ultraviolet irradiation part  101  to and from the control unit  14 . 
     As the information about the ultraviolet irradiation part  101  stored in the storage element  310 , for example, a component name, a manufacturing part number, specifications, a manufacturing division, a manufacturing number, and the like, are recorded. Additionally, history information such as an installation date, operation time (driving time of the ultraviolet irradiation part  101 ), or the like of the ultraviolet irradiation part  101  is recorded and updated between the control unit  14  and the storage element  310 . 
     Here, the ultraviolet irradiation part  101  is disposed inside the housing  120 . Additionally, the storage element  310  is disposed closer to the inlet  104  side than the ultraviolet irradiation part  101 . Further, the storage element  310  is disposed not near an opening of the outlet  105 , but on a deeper side (−Y axis direction) of the housing  120 . Accordingly, contacting of the storage element  310  with fingers of a user can be prevented. Additionally, since the lands  315  including the storage element  310  are disposed on a portion relatively far from the inlet  104 , contamination of the lands  315  by a foreign material is reduced, and thus connectivity between the storage element  310  and the coupling portion  125  can be secured. 
     Further, the ultraviolet irradiation unit  154   a  includes a temperature detecting element  400  for measuring (detecting) an ambient temperature of the ultraviolet irradiation part  101 . The temperature detecting element  400  is, for example, an IC temperature sensor, a thermocouple, a thermistor, or the like. Additionally, the temperature detecting element  400  is disposed closer to the outlet  105  side than the ultraviolet irradiation part  101 . This makes the temperature detecting element  400  less susceptible to influence of outside air taken in the housing  120 , and the ambient temperature of the ultraviolet irradiation part  101  can be reliably detected. Note that, the temperature detecting element  400  is preferably provided on a location that does not block ultraviolet rays emitted by the ultraviolet irradiation part  101 , and is provided as close to the ultraviolet irradiation part  101  as possible. In this way, the ambient temperature of the ultraviolet irradiation part  101  can be more reliably detected. 
     Next, a configuration of the control unit will be described.  FIG. 10  is a block diagram illustrating a configuration of the control unit according to the exemplary embodiment. 
     As illustrated in  FIG. 10 , the control unit  14  is coupled to the conveying unit  2 , the printing unit  3  and an operation panel unit, and further, to the temperature detecting element  400 . The control unit  14  includes a Central Processing Unit (CPU) for executing various programs, a Random Access Memory (RAM) for temporarily storing data, programs, and the like, a Read Only Memory (ROM) in which various data, various programs, and the like are recorded in advance in a non-volatile manner, and an interface. Additionally, the CPU processes various signals inputted via the interface based on data in the RAM and the ROM, and outputs control signals to each unit via the interface. 
     The control unit  14  receives operational information about user operations from the operation panel unit, and receives a detection result (movement location) from a detector of the X axis moving unit  132 . On the other hand, the control unit  14  controls the carriage motor  65  of the X axis moving unit  132 , the recording head  31 , the ultraviolet irradiation part  101  and the fan  103  of each ultraviolet irradiation unit  154 , and a driving motor of the conveying unit  2 , to perform a recording operation (liquid discharging operation). 
     Here, the storage element  310  installed on the ultraviolet irradiation part  101  of each ultraviolet irradiation unit  154   a  is coupled to the control unit  14 . The control unit  14  reads information about the ultraviolet irradiation part  101  (the component name, the manufacturing part number, the specifications, the manufacturing division, the manufacturing number, and the like), recorded in the storage element  310  in advance, and displays the read information on the operation panel. Accordingly, whether the ultraviolet irradiation part  101  is applicable to the printer  1  can be checked. 
     Further, the control unit  14 , when the recording operation starts, periodically writes a cumulated time of recording operation time to the storage element  310 . That is, driving time of the ultraviolet irradiation part  101  is cumulated. Then, for example, when a preset cumulated time of the recording operation (replacement time) is reached, the ultraviolet irradiation part  101  is replaced. At this time, the operation panel is made to display an instruction to replace the ultraviolet irradiation part  101 . Subsequently, a user, after considering a situation of the recording operation, stops the driving of the conveying unit  2  and the printing unit  3 , and replaces the ultraviolet irradiation part  101 . 
     Further, the control unit  14  acquires temperature detection data from the temperature detecting element  400 . Accordingly, the ambient temperature of the ultraviolet irradiation part  101  is acquired. Additionally, by using a relational expression between the ambient temperature of the ultraviolet irradiation part  101  and the driving time of the ultraviolet irradiation part  101 , the ultraviolet irradiation part  101  is replaced when a predetermined value is reached. Note that, the replacement time of the ultraviolet irradiation part  101  may be indicated by a warning sound or a warning light, other than by displaying on the operation panel. 
     According to the exemplary embodiment, the following advantages can be obtained. 
     It is easy to acquire the information about the ultraviolet irradiation part  101  via the storage element  310  coupled to the ultraviolet irradiation part  101 . Additionally, information about the ambient temperature of the ultraviolet irradiation part  101  can be easily acquired by the temperature detecting element  400 . Accordingly, for example, the ultraviolet irradiation part  101  can be replaced according to a relation between the cumulated operation time that the ultraviolet irradiation part  101  is operated and the ambient temperature of the ultraviolet irradiation part  101 . Accordingly, it is possible to easily grasp when to replace the ultraviolet irradiation part  101 . Additionally, it is possible to maintain quality of the ultraviolet irradiation part  101 , and improve image quality. 
     Additionally, also when the ultraviolet irradiation part  101  once used is used for another printer  1 , a history of the ultraviolet irradiation part  101  is stored in the storage element  310 , and thus a user can easily check the information about the ultraviolet irradiation part  101 . 
     Additionally, by mounting the ultraviolet irradiation unit  154   a  in the printer  1 , the printer  1  with high reliability can be provided. 
     Note that, the invention is not limited to the above-described exemplary embodiment, and various changes and improvements can be made to the above-described exemplary embodiment. Such modified examples are described below. 
     Modified Example 1 
     In the above-described exemplary embodiments, the lands  315   a ,  315   b  on the substrate  301  were disposed in parallel in the X axis direction, but the invention is not limited thereto.  FIG. 11  is a plan view illustrating a configuration of a filter unit according to the modified example. As illustrated in  FIG. 11 , in a filter unit  206   a , the lands  315   a ,  315   b  on the substrate  301  are disposed in parallel in the Y axis direction. Even with this configuration, similar advantages as described above can be obtained. In addition, a size of the substrate  301  can be further reduced. Note that, other configurations are similar to those in First Exemplary Embodiment, thus descriptions thereof will be omitted. 
     Modified Example 2 
     In the above-described exemplary embodiments, the storage element  310  and the control unit  14  were coupled by wiring, but the invention is not limited thereto.  FIG. 12  is a plan view illustrating a configuration of a filter unit according to the modified example. As illustrated in  FIG. 12 , a filter unit  206   b  includes an antenna for wireless communication  316  coupled to the storage element  310 . Additionally, the control unit  14  is installed with a transmission/reception unit capable of transmitting/receiving information to and from the antenna for wireless communication  316 . In this way, the storage element  310  and the control unit  14  can be wirelessly connected without contact. Further, installation of the coupling portion  125  on the ultraviolet irradiation unit  154  side becomes unnecessary, and a configuration of the ultraviolet irradiation unit  154  can be simplified. Note that, configurations other than for the antenna for wireless communication  316  are similar to those in First Exemplary Embodiment, thus descriptions thereof will be omitted. 
     Modified Example 3 
     In the ultraviolet irradiation unit  154  in the above-described exemplary embodiments, the filter unit  206  was disposed on the upper part of the housing  120  (the inlet  104  side), but the invention is not limited thereto.  FIG. 13  is a perspective view illustrating a configuration of an ultraviolet irradiation unit according to the modified example. As illustrated in  FIG. 13 , a filter unit  206   c  is disposed on a housing  120  portion of a side surface portion of the ultraviolet irradiation unit  154 . Note that, in this case, an opening is formed on a portion to which the filter  106  of the filter unit  206   c  of the housing  120  corresponds. Additionally, in this case, the filter unit  206   c  may also be installed on the housing  120  according to a slide method of installing along a slide groove. Further, on the housing  120  side, the coupling portion  125  configured to be electrically coupled to the lands  315  coupled to the storage element  310  provided on the filter unit  206   c  is provided. 
     Additionally, the fan  103  is configured to be capable of switching between forward rotation drive and reverse rotation drive, and is set such that air intake from the filter  106  is possible. In this way, ink mists generated when the recording head  31  moves in the X axis direction can be collected efficiently from a side surface side of the ultraviolet irradiation unit  154 . 
     Modified Example 4 
     In the above-described exemplary embodiments, the filter unit  206  was provided with the locating grooves  222   a ,  222   b  and the locating hole  224 , and the locating pins  121   a ,  121   b , and the locating pin  122  were installed on the housing  120  side, but the invention is not limited thereto. Instead of the above-described embodiments, a concave portion, a convex portion, or the like may be used. Even with this configuration, a coupling location between the filter unit  206  and the housing  120  can be defined. 
     Other Modified Examples 
     The above-described exemplary embodiments or the above-described modified examples may be appropriately combined and configured. 
     Additionally, the above-described exemplary embodiments were configured to include two ultraviolet irradiation units  154  adjacent both on a front side and a back side of the recording head  31 , but a configuration in which only one ultraviolet irradiation unit  154  is included may be used. 
     Further, in the configurations of the above-described exemplary embodiments, the outlet  105  was disposed facing forward, but, for example, a configuration in which the outlet  105  is disposed facing forward and upward, that is, facing obliquely upward may be used. 
     Note that, in the printer  1  in the above-described exemplary embodiments, the ultraviolet cure type ink was used, but as an electromagnetic wave cure type ink, ink that cures by being irradiated with infrared rays, microwaves, or the like, may be used. Additionally, as ink, not only the electromagnetic wave cure type ink, but also a general aqueous ink and a solvent ink, a gel ink, a hot-melt ink, or the like may be applied. 
     Additionally, in the above-described exemplary embodiments, the printer that discharges ink was described, but an embodiment in which liquid (droplets) other than ink is discharged (or ejected) may be adopted. For example, a printer may be adopted that discharges liquid (functional liquid) including materials such as an electrode material and a color material used in manufacture of liquid crystal displays, electroluminescent (EL) displays, surface emitting displays, color filters and the like in a dispersed or dissolved form. 
     Additionally, a printer discharging bioorganic substances used for biochip manufacturing, a printer used as a precision pipette and discharging liquid to be a sample, a printing apparatus, a micro dispenser, or the like may be used. 
     Further, the invention may be appropriately applied to a printer discharging lubricant to a precision machine such as a clock or a camera in a pinpoint manner, a printer discharging transparent resin liquid such as ultraviolet cure resin or the like on a substrate for forming a tiny hemispherical lens (optical lens) or the like used for an optical communication element and the like, and a printer discharging etching liquid such as an acid or an alkali for etching a substrate or the like. 
     Note that, as a configuration in which liquid is discharged, a configuration in which liquid is discharged such that the liquid flies in a granular state, a configuration in which liquid is discharged such that the liquid flies in a teardrop state, a configuration in which liquid is discharged in a state where the liquid flies drawing a string tail, and the like are supposed. 
     Additionally, as liquid, a liquid material that can be discharged from a liquid discharging device may be used. For example, fluid such as liquid with high or low viscosity, sol, gel water, or other inorganic solvents, an organic solvent, a solution, a liquid resin, a liquid metal (a metallic melt), and not only liquid as a state of a substance, but also liquid in which particles of functional materials formed of solid materials such as pigments and metallic particles are dissolved, dispersed, or mixed in a solvent, or the like, are supposed. 
     Content derived from the exemplary embodiments will be described below. 
     A filter unit is a filter unit disposed in a printer provided with a control unit, and includes a filter configured to trap a foreign material, a frame configured to hold the filter, and a storage element provided on the frame and capable of transmitting/receiving information about the filter to and from the control unit. 
     According to this configuration, it is easy to acquire the information about the filter via the storage element. For example, by acquiring the cumulated time that the filter is used, when a predetermined cumulated time is reached, the filter can be replaced. Accordingly, it is possible to easily grasp when to replace the filter. In this case, for example, it is possible to maintain the cooling efficiency of the ultraviolet irradiation part, and prevent deterioration of the ultraviolet irradiation part, by installing a filter on the ultraviolet irradiation unit, and making the filter replaceable at an appropriate time. 
     In the above-described filter unit, the frame is preferably formed in a rectangular shape, and the filter and the storage element are preferably disposed in parallel along a short-side direction. 
     According to this configuration, the filter and the storage element can be efficiently disposed on the frame. 
     In the above-described filter unit, a coupling portion electrically coupled to the storage element, and configured to be electrically coupled to the control unit is preferably disposed at a central portion in a long-side direction of the frame. 
     According to this configuration, even when the frame is rotated by 180 degrees, the coupling portion is located at a central portion of the frame in the long-side direction, thus, for example, when the respective filter units are installed on two locations in the printer, both the filter units can be used, and convenience for a user can be enhanced. 
     A light source unit is a light source unit disposed in a printer including a control unit, and includes a housing, a light source disposed in the housing and configured to radiate ultraviolet rays, a driving circuit configured to drive the light source, a temperature detecting element configured to measure an ambient temperature of the light source, and a storage element capable of transmitting/receiving information about the light source to and from the control unit. The housing includes an inlet configured to take in outside air and an outlet configured to discharge outside air taken in, and the storage element is disposed on the inlet side of the light source. 
     According to this configuration, it is easy to acquire the information about the light source via the storage element. Additionally, information about the ambient temperature of the light source can be easily acquired by the temperature detecting element. Accordingly, for example, the light source can be replaced according to the cumulated operation time that the light source is operated and the ambient temperature of the light source. Accordingly, it is easy to grasp when to replace the light source. Additionally, it is possible to maintain quality of the light source, and improve image quality. 
     In the above-described light source unit, the temperature detecting element is preferably disposed on the outlet side of the light source. 
     According to this configuration, the temperature detecting element is less susceptible to influence of outside air taken in the housing, and the ambient temperature of the light source can be reliably detected. 
     The printer includes the above-described filter unit or the above-described light source unit. 
     According to this configuration, it is easy to grasp when to replace the filter or the light source, and enhance convenience for a user. 
     This application claims priority under 35 U.S.C. § 119 to Japanese Patent Application No. 2018-030480, filed Feb. 23, 2018. The entire disclosure of Japanese Patent Application No. 2018-030480 is hereby incorporated herein by reference.