JP7112209B2 - Gas mixing device and inkjet recording device - Google Patents

Description

TECHNICAL FIELD The present invention relates to a gas mixing device for an inkjet recording apparatus that performs printing by ejecting ink from nozzles.

Japanese Unexamined Patent Application Publication No. 2002-100000 discloses a technology of a so-called continuous type ink jet recording apparatus. The disclosed inkjet recording apparatus ejects ink from a nozzle, charges only the ink particles used for printing with a charging electrode, and deflects the flight direction of the charged ink particles with a deflection electrode to perform printing. The remaining ink particles are sucked into the gutter, collected, and used again for printing. Further, in the gutter, when the ink particles are sucked and collected, the surrounding air is sucked at the same time. It is described that the sucked air continues to be sent into the ink container, and is therefore discharged from the inside of the ink container to the outside of the machine.

JP 2009-172932 A

In the inkjet recording apparatus, the gas discharged from the exhaust path passes through the ink container, so the gas is saturated with the solvent component. Further, the inside of the inkjet recording apparatus has a higher temperature than the outside of the inkjet recording apparatus due to heat generated by the operation of the apparatus. As in Patent Document 1, when the sucked air is discharged, the sucked air contains a solvent component, and when the air containing the solvent component is discharged outside the machine, it is saturated due to the temperature difference between the inside and outside of the machine. The solvent component in the state may condense into a liquid state and drop from the outlet of the exhaust path.

SUMMARY OF THE INVENTION It is an object of the present application to provide a gas mixing device that prevents dripping of condensed solvent components.

A preferred example of the present invention is a gas mixing apparatus for an inkjet recording apparatus having an exhaust path for exhausting gas, comprising: an exhaust gas intake section that takes in exhaust gas containing a solvent from the exhaust path; and the exhaust gas intake section. The gas mixing device includes a mixing section connected to take in air and mix the exhaust gas and the air, and an exhaust section connected to the mixing section to exhaust the gas in the mixing section.

According to the present invention, dripping of the condensed solvent can be prevented.

FIG. 2 is a diagram showing an exhaust route in Example 1; 2 is a detailed diagram of the gas mixing device of Example 1. FIG. It is a figure which shows the gas mixing apparatus of Example 2. FIG. It is a figure which shows the gas mixing apparatus of Example 3. FIG. FIG. 11 is a diagram showing an arrangement example of the gas mixing device of Example 3; FIG. 10 is a diagram showing a connection method of the gas mixing device of Example 4; FIG. 10 is a diagram showing a different connection method of the gas mixing device of Example 4; FIG. 10 is a diagram showing a connection configuration of a gas mixing device of Example 5; 1 is an external perspective view of an inkjet recording apparatus; FIG. It is a perspective view which shows the use condition of an inkjet recording device. 1 is a schematic diagram showing the principle of operation of an inkjet recording apparatus; FIG. It is a figure which shows the path|route structure of an inkjet recording device.

Examples will be described below with reference to the drawings.

FIG. 9 is an external perspective view of an inkjet recording apparatus 400 according to Example 1. FIG.
In FIG. 9, 1 is an inkjet recording apparatus main body (hereinafter referred to as main body), 2 is a print head, 3 is an operation display section, and 4 is a conduit. An inkjet recording apparatus 400 includes an operation display section 3 in a main body 1 and a print head 2 on the outside.

Next, the state of use of this inkjet recording apparatus 400 will be described with reference to FIG. As shown in FIG. 10, the inkjet recording apparatus 400 is installed, for example, on a production line in a factory where food and beverages are produced. The main body 1 is installed at a position where the user can operate it. The print head 2 is installed at a position such as a belt conveyor 15 where it can approach a print target 13 fed on a production line.

In order to print with the same width regardless of the feeding speed on the production line such as the belt conveyor 15, the encoder 16 that outputs a signal corresponding to the feeding speed to the inkjet recording device 400 and the printing object 13 are detected. A print sensor 17 for outputting a signal instructing printing to the ink jet recording apparatus 400 is installed, and is connected to a control unit (not shown) in the main body 1 . The controller controls the charging amount and charging timing of the ink particles 7C ejected from the nozzles 8 according to the signals from the encoder 16 and the print sensor 17, and while the print target 13 passes near the print head 2, The charged and deflected ink particles 7C are made to adhere to the printing object 13 to perform printing.

Next, the operating principle of the inkjet recording apparatus 400 will be described with reference to FIG.
18 is the main ink container, 7A is the ink, 24 is a pump (for supply) that pressurizes and sends out the ink 7A, 9 is an electrostrictive element that vibrates at a predetermined frequency when voltage is applied, and 8 is the ink 7A. The ejecting nozzle, 7B, is the ink column. 10 is a charging electrode that charges ink particles, 7C is an ink particle, 11 and 12 are deflection electrodes, 13 is a printing object to be printed, and 14 is a gutter for collecting ink particles that are not used for printing. be. A pump (for recovery) 25 sucks the ink recovered by the gutter 14 and sends it to the main ink container 18 .

The ink 7A in the main ink container 18 is sucked and pressurized by a pump (for supply) 24 to form an ink column 7B and is ejected from the nozzle 8. As shown in FIG. The nozzle 8 is provided with an electrostrictive element 9, and vibrates the ink 7A at a predetermined frequency to form ink columns 7B ejected from the nozzle 8 into particles. The number of ink particles 7C thus generated is determined by the frequency of the excitation voltage applied to the electrostrictive element 9, and is the same as the frequency. The ink particles 7C are charged by applying a voltage corresponding to the print information to the deflection electrodes 11 and 12. FIG.

The ink particles 7C charged by the charging electrode 10 fly in the electric field between the deflection electrodes 11 and 12. FIG. A deflection electric field is formed between a high-voltage electrode to which a high voltage of 5 to 6 kV is applied and a ground electrode provided, and the charged ink particles 7C are deflected by receiving a force proportional to the amount of charge. , fly toward the printing object 13 and land thereon. At that time, the impact position of the ink particles 7C in the deflection direction changes according to the amount of charge. Particles can be landed, and characters are formed by a plurality of landed particles and printed. Ink particles 7C not used for printing fly linearly between the deflection electrodes 11 and 12, are captured by the gutter 14, are sucked by the pump (for recovery) 25, and are recovered in the main ink container 18. .

Next, the path configuration of the inkjet recording apparatus 400 will be described with reference to FIG. 12 . The inkjet recording apparatus 400 is composed of a main body 1 , a print head 2 , and a conduit 4 connecting the main body 1 and the print head 2 .

First, the ink supply path of the inkjet recording apparatus 400 of this embodiment will be described. The body 1 is provided with a main ink container 18 that holds circulating ink 7A. The main ink container 18 is connected to a viscosity measuring device 33 via a path 200 in order to ascertain the viscosity of the ink 7A within the main ink container 18. As shown in FIG.

The viscosity measuring device 33 is connected via a path 201 to a solenoid valve (for supply) 34 that opens and closes the path. It is connected to a pump (for supply) 24 used for suction and pumping.

The pump (for supply) 24 is connected via a path 204 to a filter (for supply) 28 that removes foreign matter mixed in the ink 7A. The filter (for supply) 28 is connected to a pressure reducing valve 31 that adjusts the pressure of the ink 7A pressure-fed from the pump (for supply) 24 via the path 205 to a proper pressure for printing. The pressure reducing valve 31 is equipped with a pressure gauge 32 for measuring the pressure of the ink 7A supplied to the nozzle 8 via the path 206. As shown in FIG.

Pressure gauge 32 is connected via path 207 through conduit 4 to heater 40 provided within printhead 2 . The heater 40 performs heating control so that the ink 7A reaches a proper ink temperature when used in a low temperature environment. The heater 40 is connected via a path 208 to a sealing valve 41 that opens and closes the path, and the sealing valve 41 is connected via a path 209 to the nozzle 8 . The nozzle 8 has an ejection opening for ejecting the ink 7A. A gutter 14 is arranged in the straight direction of the ejection port of the nozzle 8 to catch the ink particles 7C that fly straight without being charged or deflected because they are not used for printing.

Next, the ink replenishment route of the inkjet recording apparatus 400 will be described. The main body 1 is provided with an auxiliary ink container 19 that holds ink for replenishment, and the auxiliary ink container 19 is connected via a path 221 to an electromagnetic valve (for replenishment) 36 that opens and closes the path. . The electromagnetic valve (for replenishment) 36 is connected via a path 222 to a confluence path 223 connected to the path 203 .

Next, the solvent replenishing route of the inkjet recording apparatus 400 will be described. The main body 1 is provided with a solvent container 20 that holds a solvent for replenishing the solvent. It is connected. Pump (for solvent) 27 is connected to solenoid valve (for solvent) 38 via path 232 to open and close the flow path. The solenoid valve (for solvent) 38 is connected to the main ink container 18 via a path 233 to supply solvent from the solvent container 20 to the main ink container 18 .

Next, the ink recovery path of the inkjet recording apparatus 400 will be described. The gutter 14 is connected via a path 212 passing through the conduit 4 to a filter (for recovery) 30 that removes foreign matter mixed in the ink arranged in the main body 1 . 30 is connected via a path 213 to a solenoid valve (for recovery) 35 that opens and closes the path. The electromagnetic valve (for recovery) 35 is connected via a path 214 to a pump (for recovery) 25 that sucks the ink particles 7C captured by the gutter 14 . Pump (for recovery) 25 is connected to main ink container 18 via path 215 (ink recovery).

Next, the discharge path of the air mixed with the solvent vapor of the inkjet recording apparatus 400 will be described. Since the ink 7A uses a highly volatile solvent, the air flowing through the paths 212 to 215 is mixed with solvent vapor having a concentration close to the saturated vapor concentration. In the main ink container 18 , the air mixed with the solvent vapor that has flowed in through the path 215 is exhausted out of the machine through the exhaust path 217 . The exhaust path 217 communicates with the outside of the main body 1 via a duct 410 .

Next, a gas mixing device of an embodiment will be described with reference to FIGS. 1 to 8. FIG. As shown in FIG. 1 , the gas mixing device 500 is arranged inside the main body 1 between the exhaust path 217 and the duct 410 . The duct 410 is for connecting the inkjet recording apparatus 400 to exhaust equipment (not shown). By making the duct 410 extendable, it is possible to make the connection with the exhaust equipment easier.

In FIG. 2, the structure of the gas mixing apparatus 500 is shown. The gas mixing device 500 is composed of a connection section 510 , a mixing section 520 and an exhaust section 530 . The arrows in the figure schematically represent the direction of flow of each gas. Mixing section 520 is connected to exhaust path 217 by connecting section 510 as an example of an exhaust gas intake section.

Further, the mixing section 520 is connected to an exhaust section 530 and is connected by the exhaust section 530 to the duct 410 (shown in FIG. 1). A power cord 521 connected to a power source, an inflow device 522 operated by a power source interlocking with the main body 1, and a shutter 523 are attached to the mixing section 520. As shown in FIG. Operation of the inlet device 522 allows ambient air to be drawn into the gas mixing device 500 .

The inflow device 522 may be, for example, a fan. The entrained ambient air is mixed in chamber 524 with gas containing solvent vapor near saturation vapor concentration coming through exhaust path 217 . A shutter 523 can be closed when the inlet device 522 is not in operation and can separate the chamber 524 and the inlet device 522 . A replaceable exhaust filter 525 is provided on the exit side of the chamber 524 to remove ink components contained in the gas mixture. In addition, the inflow device 522 is detachable and has a structure in which the inside of the chamber 524 can be cleaned.

The end of the exhaust filter 525 is connected to the exhaust section 530 and connected to the outside of the inkjet recording apparatus 400 via the duct 410 . Since the gas mixing device 500 is exposed to a gas atmosphere containing a solvent component, a material with high solvent resistance is used.

Since the inflow device 522 is separated from the chamber 524 exposed to the gas containing the solvent component by the shutter 523, it is not always necessary to use a material with high solvent resistance. Also, the shutter 523 can be replaced with something like a filter. Also, the exhaust filter 525 may be one that can remove the solvent component.

According to the first embodiment, by mixing the ambient air with the gas containing the solvent component near the saturated vapor concentration that has passed through the exhaust path 217, the vapor concentration of the solvent component is reduced before discharging to the outside of the inkjet recording apparatus 400. can be reduced, and the solvent component can be prevented from condensing at the outlet of the duct 410, for example, dripping onto the floor and staining the floor.

Next, FIG. 3 shows a different shape of the mixing section 520 in the gas mixing device 500 attached to the inkjet recording apparatus 400. As shown in FIG. Attached to the mixing section 520 is an inflow device 522 operated by a power source associated with the main body 1 , a power cord 521 connected to the power source, and a shutter 523 . Operation of the inflow device 522 allows ambient air to be entrained.

Ambient air drawn in from inlet device 522 passes through inlet channel 526 positioned over chamber 524 and enters chamber 524 through an opening 527 provided at one end. The incoming ambient air will then flow in the same direction as the exhausted gas. The ambient air mixed with the exhausted gas in the chamber 524 is removed of the ink component contained in the mixed gas by the replaceable exhaust filter 525 arranged on the outlet side, and passes through the exhaust section 530. It is designed to be exhausted.

Moreover, the wall surface forming the chamber 524 and the outer wall surface forming the intake path 526 are formed of separate structures, and each can rotate independently on the same axis. In addition, the opening 527 is structured so as to protrude toward the chamber 524, which is a mixing space, so that even if the solvent component condensed and becomes liquid in the chamber 524 is tilted, the intake path 526, exhaust filter 525, etc. It is structured so that it does not come into contact with

According to the second embodiment, since the inflow device 522 is separated from the chamber 524, it can be made less susceptible to the gas containing the solvent component. In addition, since the ambient air taken in flows from the surroundings centering on the gas to be discharged, the gas containing the solvent component to be discharged can be mixed more efficiently. In addition, by making the walls of the chamber 524 and the intake path 526 separate structures, it is possible to install the inflow device 522 without worrying about the direction, and the solvent component condensed inside the chamber 524 can be removed from the chamber 524 It can be prevented from leaking to the outside.

Next, FIG. 4 shows a different shape of the mixing section 520 of the gas mixing device 500 attached to the inkjet recording apparatus 400. As shown in FIG. In addition to the mixing section 520 as shown in Embodiment 2, a gas flow path 543 for flowing the gas to be exhausted into the chamber 524 and a gas flow path 544 for flowing out from the chamber 524 to the exhaust section 530 are coaxial. It is positioned inside the chamber 524 in an upside-down position such that the gas to be exhausted is meandering out to the exhaust 530 .

According to Example 3, since the flow of the gas containing the solvent component is not linear, the gas mixing device 500 can be moved not only in the horizontal direction but also in the horizontal direction as shown in FIGS. , may be tilted vertically. Even if the gas mixing device 500 is tilted in the vertical direction, the gas flow path 543 for flowing into the chamber 524 and the gas flow path 544 for flowing out from the chamber 524 to the exhaust section 530 are not coaxial. The solvent component does not flow out from mixing section 520 . Therefore, the third embodiment is effective when it is desired to arrange the gas mixing device 500 in the vertical direction due to the space inside the main body 1 .

Next, FIG. 6 shows a different form of the gas mixing device 500 attached to the inkjet recording device 400. As shown in FIG. The configurations of Examples 1 to 3 can also be arranged outside the main body 1 . In FIG. 6, the gas mixing device 500 includes a connection portion 510, a mixing portion 520, an exhaust portion 530, and an inflow device 522 (not shown). The exhaust part 530 is connected to the duct 420 and connected to an exhaust facility (not shown). It should be noted that the duct 420 can also be configured to be stretchable.

The gas mixing device 500 is arranged outside the main body 1 and is connected to the duct 410 which is the outlet of the gas to be exhausted from the main body 1 by the connecting part 510 . A power cord 521 is connected to a power source for operating the inflow device 522 . The power source may be a power source independent from the main body 1 . As the shape of the connecting portion 510, there is a collet chuck shape as a fixing portion using an outer cylinder 511 and claws 512. FIG.

With this shape, connecting portion 510 can be fixed to duct 410 having a different diameter by replacing outer cylinder 511 and claw 512 . Alternatively, as shown in FIG. 7, the duct 410 may be provided with a protruding guide 545 and an O-ring 547, and the connection portion 510 may be cut with an L-shaped guide groove 546. FIG.

With this shape, after connecting along the axial direction, by rotating in the circumferential direction, it is possible to prevent it from coming off when it is pulled.

According to the fourth embodiment, it is easy to connect with the main body 1 and hard to come off even when pulled. Note that the locations where the guides 545 and the guide grooves 546 are provided may be reversed. Furthermore, as a simple shape, the connecting portion 510 may be formed of a flexible tubular material, and after being connected to the duct 410, it may be fixed with a clip or the like.

Next, FIG. 8 shows another embodiment of the mixing section 520 in the case of attaching to the outside of the gas mixing device 500 attached to the inkjet recording apparatus 400 . FIG. 8(A) is a simplified diagram of the main body 1 before the gas mixing device 500 is attached. FIG. 8(B) is a simplified diagram after the gas mixing device 500 is attached. The mixing section 520 has an exhaust gas intake portion connected to the exhaust channel 217 and having an opening for taking in the exhaust gas from the duct 410 extending to the outside from the main body 1, and a gas channel 528 instead of the inflow device 522. there is Inside the main body 1, a main body fan 540 and an exhaust port 541 for circulating and exhausting the air in the housing are provided.

The gas path 528 has an opening that can cover the exhaust port 541 of the main body 1 and can be fixed to the main body 1 with a flange 529 so that it can be fixed in close contact with the main body 1 . It should be noted that the shape is not limited to the shape of the flange 529, and may be a shape such as a magnet or an attachment, as long as it can be brought into close contact with the main body 1 and fixed. The air discharged outside the main body from the exhaust port 541 by the main body fan 540 passes through the gas path 528 and is mixed in the chamber 524 with the exhausted gas flowing in from the duct 410 serving as the exhaust gas intake section.

A replaceable exhaust filter 525 is arranged on the outlet side of the chamber 524 to remove the ink component contained in the gas to be mixed, and then the mixed gas is exhausted through the exhaust section 530 . In addition, a check valve 542 is provided in the gas path 528 so that when the main body fan 540 stops, the discharged gas containing the solvent component does not flow back into the main body 1. there is

According to the fifth embodiment, it is possible to mix the discharged gas and the taken-in air while circulating the air inside the main body 1 without adding a new fan.

DESCRIPTION OF SYMBOLS 1... Main body 217... Exhaust path 400... Inkjet recording apparatus 500... Gas mixing apparatus 510... Connection part 520... Mixing part 522... Inflow apparatus 524... Chamber 525... Exhaust filter 526... Intake path , 527 ... opening, 528 ... gas path, 530 ... exhaust part

Claims (13)

A gas mixing device for an inkjet recording device having an exhaust path for exhausting gas,
an exhaust gas intake section that takes in exhaust gas containing a solvent from the exhaust path;
a mixing section that is connected to the exhaust gas intake section, takes in air, and mixes the exhaust gas and the air;
an exhaust unit connected to the mixing unit and exhausting gas from the mixing unit ;
The gas mixing device , wherein the exhaust path is connected to an ink container holding the collected ink, and the ink container is connected to a solvent supply path . A gas mixing device for an inkjet recording device having an exhaust path for exhausting gas,
an exhaust gas intake section that takes in exhaust gas containing a solvent from the exhaust path;
a mixing section that is connected to the exhaust gas intake section, takes in air, and mixes the exhaust gas and the air;
an exhaust unit connected to the mixing unit and exhausting gas from the mixing unit ;
The mixing unit has an inflow device, and takes in the air by operating the inflow device,
The mixing section has an intake path for taking in the air from the inflow device and a chamber, and an opening disposed between the intake path and the chamber protrudes into the chamber. and gas mixing device. In the gas mixing device according to claim 1,
The gas mixing device, wherein the mixing section has an inflow device, and the air is taken in by the operation of the inflow device. 4. The gas mixing device of claim 3, wherein the inlet device is a fan,
The gas mixing device, wherein the mixing section has a shutter, and the shutter is closed when the fan is not operating. 5. The gas mixing apparatus according to claim 3, wherein said exhaust section has a filter for removing ink components or solvent components contained in said exhaust gas. 3. The gas mixing apparatus according to claim 2 , wherein in the mixing section, an inflow gas path for inflowing the exhaust gas into the chamber and an outflow gas exhaust path for outflowing the gas from the chamber to the exhaust section are coaxial. A gas mixing device characterized in that it is arranged so as not to be in the A gas mixing device for an inkjet recording device having an exhaust path for exhausting gas,
an exhaust gas intake section that takes in exhaust gas containing a solvent from the exhaust path;
a mixing section that is connected to the exhaust gas intake section, takes in air, and mixes the exhaust gas and the air;
an exhaust unit connected to the mixing unit and exhausting gas from the mixing unit ;
The mixing unit has an inflow device, and takes in the air by operating the inflow device,
The gas mixing apparatus according to claim 1, wherein the inkjet recording apparatus has a duct connected to the exhaust path and extending to the outside, and the exhaust gas intake section has a fixing section for fixing to the duct . A gas mixing device for an inkjet recording device having an exhaust path for exhausting gas,
an exhaust gas intake section that takes in exhaust gas containing a solvent from the exhaust path;
a mixing section that is connected to the exhaust gas intake section, takes in air, and mixes the exhaust gas and the air;
an exhaust unit connected to the mixing unit and exhausting gas from the mixing unit ;
A gas mixing apparatus , wherein the inkjet recording apparatus has a duct extending to the outside connected to the exhaust path, and the exhaust gas intake section is connected to an end of the duct . 9. The gas mixing apparatus according to claim 8 , wherein the inkjet recording apparatus has a ventilation device and an exhaust port, and the ventilation device is operated to allow the air to flow into the mixing section through the exhaust port. Characterized gas mixing device. an ink container holding ink for printing on a printing target;
a nozzle that is connected to the ink container and ejects the pressurized ink;
a charging electrode that charges the ink ejected from the nozzle and used for printing;
a deflection electrode that deflects the ink charged by the charging electrode;
a gutter for collecting ink not used for printing;
a collection path for collecting the ink sucked from the ink container into the ink container;
an exhaust path connected to the ink container for releasing gas from the ink container;
a gas mixing device connected to the exhaust path;
The gas mixing device is
an exhaust gas intake section that takes in exhaust gas containing a solvent from the exhaust path ;
a mixing unit connected to the exhaust gas intake unit , taking in air and mixing the exhaust gas and the air;
an exhaust unit connected to the mixing unit and exhausting gas from the mixing unit ;
An inkjet recording apparatus , wherein the exhaust path is connected to an ink container that holds collected ink, and the ink container is connected to a solvent supply path . an ink container holding ink for printing on a printing target;
a nozzle that is connected to the ink container and ejects the pressurized ink;
a charging electrode that charges the ink ejected from the nozzle and used for printing;
a deflection electrode that deflects the ink charged by the charging electrode;
a gutter for collecting ink not used for printing;
a collection path for collecting the ink sucked from the ink container into the ink container;
an exhaust path connected to the ink container for releasing gas from the ink container;
a gas mixing device connected to the exhaust path;
The gas mixing device is
an exhaust gas intake section that takes in exhaust gas containing a solvent from the exhaust path ;
a mixing section that is connected to the exhaust gas intake section , takes in air, and mixes the exhaust gas and the air;
an exhaust unit connected to the mixing unit and exhausting gas from the mixing unit ;
The mixing unit has an inflow device, and takes in the air by operating the inflow device,
The mixing section has an intake path for taking in the air from the inflow device and a chamber, and an opening disposed between the intake path and the chamber protrudes into the chamber. Inkjet recording device. an ink container holding ink for printing on a printing target;
a nozzle that is connected to the ink container and ejects the pressurized ink;
a charging electrode that charges the ink ejected from the nozzle and used for printing;
a deflection electrode that deflects the ink charged by the charging electrode;
a gutter for collecting ink not used for printing;
a collection path for collecting the ink sucked from the ink container into the ink container;
an exhaust path connected to the ink container for releasing gas from the ink container;
a gas mixing device connected to the exhaust path;
The gas mixing device is
an exhaust gas intake section that takes in exhaust gas containing a solvent from the exhaust path ;
a mixing section that is connected to the exhaust gas intake section , takes in air, and mixes the exhaust gas and the air;
an exhaust unit that is connected to the mixing unit and exhausts gas from the mixing unit ;
having an externally extending duct connected to the exhaust path;
The mixing unit has an inflow device, and takes in the air by operating the inflow device,
The inkjet recording apparatus , wherein the exhaust gas intake section has a fixing section for fixing to the duct . an ink container holding ink for printing on a printing target;
a nozzle that is connected to the ink container and ejects the pressurized ink;
a charging electrode that charges the ink ejected from the nozzle and used for printing;
a deflection electrode that deflects the ink charged by the charging electrode;
a gutter for collecting ink not used for printing;
a collection path for collecting the ink sucked from the ink container into the ink container;
an exhaust path connected to the ink container for releasing gas from the ink container;
a gas mixing device connected to the exhaust path;
The gas mixing device is
an exhaust gas intake section that takes in exhaust gas containing a solvent from the exhaust path ;
a mixing unit connected to the exhaust gas intake unit , taking in air and mixing the exhaust gas and the air;
an exhaust unit that is connected to the mixing unit and exhausts gas from the mixing unit ;
having an externally extending duct connected to the exhaust path;
The inkjet recording apparatus , wherein the exhaust gas intake section is connected to an end of the duct .

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