Functional liquid passage unit and functional liquid discharge device

Abstract

To provide a functional liquid passage unit which may supply a heated functional liquid to a droplet discharge part while inhibiting temperature drop of the functional liquid, and to provide a functional liquid discharge device.SOLUTION: An ink passage unit 100 connects a passage member 343 which has a passage R for causing an ink supplied from an ink tank 342 to flow and is heated by a heating member H with an inflow part 340a of a recording head 340 which discharges a functional liquid and includes: a first pipe member 110 connected at a first end 110a to the passage R; and a heat transmission member 130 which is provided so as to extend from the passage R and pass through the first pipe member 110.SELECTED DRAWING: Figure 5

Description

[Technical field]

[0001] The present invention relates to a functional liquid flow path unit and a functional liquid ejection device. [Background technology]

[0002] A functional liquid ejection device that ejects droplets of a functional liquid from a droplet ejection section is known in the art. In the functional liquid ejection device, a heating member such as a heater is provided in order to eject a functional liquid, which has a high viscosity at room temperature, from the droplet ejection section.

[0003] For example, Patent Document 1 describes a configuration in which a heating member is provided in a flow path member provided between a main tank and an inlet of a droplet ejection section, with the aim of supplying the functional liquid to the droplet ejection section without lowering its temperature. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] JP 2013-230633 A Summary of the Invention [Problem to be solved by the invention]

[0005] However, in the invention of Patent Document 1, a heating member is not provided in the flow path unit that connects the flow path member and the inflow part. Therefore, depending on the length of the flow path unit, the heat from the heating member is not easily transferred to the inflow part. As a result, the temperature of the functional liquid in the droplet discharge part may decrease.

[0006] The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a functional liquid flow path unit and a functional liquid ejection device that are capable of supplying a heated functional liquid to a droplet ejection section while suppressing a decrease in temperature of the functional liquid. [Means for solving the problem]

[0007] In order to solve the above problems, the invention described in claim 1 is: a functional liquid flow path unit that connects a flow path member that has a flow path for flowing a functional liquid supplied from a functional liquid reservoir and is heated by a heating member, and an inlet portion of a droplet discharge portion that discharges the functional liquid, a first pipe member having a first end connected to the flow passage; a heat transfer member provided so as to pass from the flow path through the first pipe member.

[0008] The invention described in claim 2 is the functional liquid flow path unit described in claim 1, The heat transfer member is provided so as to reach the inlet of the inflow portion.

[0009] The invention described in claim 3 is the functional liquid flow path unit described in claim 1, The heat transfer member is made of a metal.

[0010] The invention according to claim 4 is the functional liquid flow path unit according to claim 3, The heat transfer member is made of aluminum.

[0011] The invention described in claim 5 is the functional liquid flow path unit described in claim 1, the heat transfer member includes a holding portion that is a protrusion that protrudes in a direction substantially perpendicular to a flow direction of the functional liquid; The first pipe member includes a support portion that supports the holding portion and determines the position of the heat transfer member in the flow direction of the functional liquid.

[0012] The invention according to claim 6 is the functional liquid flow path unit according to claim 1, A second pipe member is provided that connects a second end of the first pipe member with the inlet.

[0013] The invention according to claim 7 is the functional liquid flow path unit according to claim 6, The second pipe member has thermal insulation properties.

[0014] The invention according to claim 8 is the functional liquid flow path unit according to claim 6, A heat insulating member is provided on the peripheral surface of the second pipe member.

[0015] The invention described in claim 9 is a functional liquid ejection device, comprising: a functional liquid storage section for storing a functional liquid; a flow path member having a flow path through which the functional liquid supplied from the functional liquid reservoir flows; A heating member for heating the flow path member; a droplet ejection unit that ejects the functional liquid; and the functional liquid flow path unit according to any one of claims 1 to 8. Effect of the Invention

[0016] According to the present invention, a high-temperature functional liquid can be discharged from the droplet discharge portion. [Brief description of the drawings]

[0017] [Figure 1] FIG. 2 is a side cross-sectional view showing the internal configuration of the inkjet recording apparatus. [Diagram 2] FIG. 2 is a block diagram showing the functional configuration of the inkjet recording apparatus. [Diagram 3] FIG. 2 is a perspective view showing a schematic configuration of an ink ejection unit. [Figure 4] FIG. 2 is an enlarged view showing the vicinity of a recording head of an ink ejection section. [Diagram 5] 4 is an explanatory diagram showing a partial cross-sectional view of an ink flow path unit that connects a recording head and a flow path member. FIG. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0018] An inkjet recording apparatus, which is one embodiment of a functional liquid ejection apparatus equipped with a functional liquid flow path unit of the present invention, will be described in detail below with reference to the drawings. However, the scope of the invention is not limited to the illustrated example. In the following description, parts having the same functions and configurations are given the same reference numerals and their description will be omitted.

[0019] [Overall configuration of inkjet recording device] Fig. 1 is a side cross-sectional view showing the main configuration of an inkjet recording apparatus 1. The inkjet recording apparatus 1 is one embodiment of a functional liquid ejection device of the present invention. Fig. 2 is a block diagram showing the functional configuration of the inkjet recording apparatus 1. The inkjet recording apparatus 1 includes a paper feed unit 2, an image forming unit 3, a stacking unit 4, a control unit 5, etc.

[0020] (Paper feed section) The paper feed unit 2 conveys the recording medium P to the image forming unit 3 under the control of the control unit 5. The paper feed unit 2 includes a paper feed tray 21, a supply unit 22, a conveying unit 23, and the like.

[0021] {Paper feed tray} The paper feed tray 21 is a plate-like member that stores recording media P before image formation. The paper feed tray 21 is provided so that one or more recording media P can be placed on it. The paper feed tray 21 moves up and down depending on the amount of recording media P placed on it. By this up and down movement, the paper feed tray 21 is held at a position where the topmost recording medium P is transported by the transport unit 23.

[0022] {Supply section, conveying section} The supply unit 22 supplies the top recording medium P placed on the paper feed tray 21 to the transport unit 23. The transport unit 23 transports the recording medium P from the paper feed tray 21 to the image forming unit 3. The transport unit 23 includes a transport mechanism. The transport mechanism drives a belt 233 to transport the recording medium P on the belt 233. The belt 233 is loop-shaped. The inner side of the loop of the belt 233 is supported by a plurality of rollers 231 and 232.

[0023] (Image forming section) The image forming unit 3 performs a recording operation on the recording medium P under the control of the control unit 5. A detailed configuration of the image forming unit 3 will be described later.

[0024] (Stacking section) The stacking unit 4 transports and stores the recording medium P on which an image has been recorded by the image forming unit 3. The stacking unit 4 includes a storage tray 41 and a stacking transport unit .

[0025] {Storage tray} The storage tray 41 is a plate-shaped member that stores the recording medium P after image recording. The storage tray 41 is provided so that one or a plurality of recording media P can be placed thereon.

[0026] {Collection conveyor section} The accumulation conveying section 42 conveys the recording medium P from the image forming section 3 to the storage tray 41. The accumulation conveying section 42 is provided with a plurality of accumulation conveying chain sprockets 421, 422, 423. One accumulation conveying chain sprocket 421 is disposed in the image forming section 3. On the other hand, the other accumulation conveying chain sprockets 422, 423 are disposed in the accumulation section 4. The recording medium P on which an image has been formed in the image forming section 3 is conveyed while being held on the accumulation conveying belt 424 by the accumulation claws 425. This holding is released on the storage tray 41. Then, the recording medium P is stored in the storage tray 41.

[0027] (Control unit) The control unit 5 controls each part of the inkjet recording apparatus 1. The control unit 5 is also composed of a ROM (Read Only Memory) 51, a CPU (Central Processing Unit) 52, a RAM (Random Access Memory) 53, etc. The ROM 51 stores a program for controlling each component of the inkjet recording apparatus 1. The CPU 52 executes the program stored in the ROM 51 in the RAM 53.

[0028] [Detailed configuration of the image forming unit] 1, the image forming unit 3 includes a transfer drum 31 and an image forming drum 32. Around the image forming drum 32, heating rollers 33 and 36, a plurality of ink ejection units 34, a UV lamp 35, and the like are arranged.

[0029] (Delivery drum) The delivery drum 31 is a recording medium supplying means that delivers the recording medium P conveyed from the paper feed section 2 to the image forming drum 32. A part of the outer periphery of the delivery drum 31 is in close proximity to the image forming drum 32. The recording medium P is delivered to the image forming drum 32 at this close portion.

[0030] The delivery drum 31 is provided with a plurality of claws and an adsorption portion (not shown). The claws clamp one end of the recording medium P and hold it on the outer circumferential surface of the image forming drum 32. The adsorption portion adsorbs the recording medium P to the outer circumferential surface of the delivery drum 31 by electrostatic adsorption or suction.

[0031] (Image forming drum) The image forming drum 32 receives the recording medium P from the delivery drum 31 and transports it in the transport direction.

[0032] (heat roller) The heating roller 33 heats the recording medium P held on the image forming drum 32 before an image is recorded by the ink ejection unit 34. The heating roller 33 is disposed immediately downstream of the transfer drum 31 in the transport direction, that is, between the transfer drum 31 and the ink ejection unit 34. A part of the heating roller 33 abuts against the outer circumferential surface of the image forming drum 32. During image formation, the recording medium P is interposed between the heating roller 33 and the image forming drum 32. At this time, the heating roller 33 presses the recording medium P against the outer circumferential surface of the image forming drum 32 to bring the recording medium P into close contact.

[0033] (Ink ejection section) The ink ejection unit 34 ejects ink droplets to record an image on the recording medium P. A detailed configuration of the ink ejection unit 34 will be described later.

[0034] (UV lamp) The UV lamp 35 is an energy ray irradiation unit that irradiates energy rays such as ultraviolet rays to the recording medium P on the image forming drum 32. The UV lamp 35 extends over the entire width of the image forming drum 32. The UV lamp 35 is disposed immediately downstream of the multiple ink ejection units 34 in the transport direction of the recording medium P.

[0035] When ultraviolet rays are used as the energy rays, examples of the light source include fluorescent tubes (such as low-pressure mercury lamps and germicidal lamps), cold cathode fluorescent tubes, ultraviolet lasers, mercury lamps, metal halide lamps, and LEDs. In particular, from the viewpoint of the curing property of the ink, an illuminance of 100 mW / cm is preferable. 2 As the light source, preferred are high pressure mercury lamps, metal halide lamps, LEDs, etc. capable of emitting the above-mentioned high-intensity UV light. Among them, LEDs are more preferred as the light source from the viewpoint of power consumption, but the light source is not limited thereto.

[0036] The above-mentioned accumulation conveyor chain sprocket 421, which is an accumulation conveyor roller of the accumulation conveyor section 42, is disposed immediately downstream of the UV lamp 35 in the conveying direction. A part of the outer periphery of the image forming drum 32 is close to the accumulation conveyor belt 424 of the accumulation conveyor chain sprocket 421. The image forming drum 32 passes the recording medium P to the accumulation conveyor belt 424 at this close portion.

[0037] (cooling fan, heating roller) Also, immediately downstream of the accumulation transport chain sprocket 421, a cooling fan (not shown) is provided to cool the outer peripheral surface of the image forming drum 32 by blowing air. Also, immediately downstream of the cooling fan, a heating roller 36 serving as a second heating section is provided. The heating roller 36 has substantially the same structure as the heating roller 33. Therefore, a detailed description thereof will be omitted.

[0038] [Specific configuration of the ink ejection section] FIG. 3 is an enlarged perspective view of one ink ejection unit 34. As shown in FIG. 3, each ink ejection unit 34 includes a head unit 34a and a carriage 34b. The head unit 34a of each ink ejection unit 34 is a line-type recording head unit extending over the entire width of the image forming drum 32. As shown in FIG. 1, a plurality of ink ejection units 34 are arranged side by side in the conveying direction of the recording medium P so as to be aligned along the circumferential direction of the image forming drum 32. The inkjet recording device 1 according to this embodiment includes four ink ejection units 34 capable of ejecting ink of four colors, namely black (K), yellow (Y), magenta (M), and cyan (C). The number of ink ejection units 34 is not limited to four, and may be increased or decreased according to the number of colors required.

[0039] As described above, the ink ejected from the head unit 34a changes phase between a gel or solid state and a liquid state depending on the temperature. Specifically, the ink has a phase transition point at a temperature of 40° C. or higher and lower than 100° C.

[0040] The ink ejected on the upstream side in the transport direction is adjusted to have a higher phase transition temperature than the ink ejected on the downstream side in the transport direction. Specifically, assuming that the phase transition temperatures of the ejected inks are P1 to P4 in order from the upstream side, the relationship is P1>P2>P3>P4. In particular, the difference in phase transition temperature between the inks ejected from a pair of ink ejection sections 34 adjacent to each other in the transport direction is preferably 0.5°C to 10°C, and more preferably 1°C to 5°C. The phase transition temperature of the ink can be adjusted by changing the type and amount of gelling agent added and the type of actinic radiation curable monomer.

[0041] (Head section) As shown in FIG. 3, the head section 34a includes a recording head 340 which is a droplet ejection section, a head fixing plate 341, an ink tank 342, and a flow path member 343.

[0042] {Head fixing plate} The head fixing plate 341 has a length covering the entire length of the image forming drum 32. A plurality of recording heads 340 are disposed on the head fixing plate 341. The plurality of recording heads 340 are arranged on the head fixing plate 341 so as to form a plurality of rows along a direction intersecting the conveying direction of the recording medium P by the image forming drum 32. As shown in FIG. 3, in this embodiment, eight recording heads 340 are arranged in two rows of four in a staggered arrangement. Each recording head 340 is attached so as to be able to eject ink from the lower surface side of the head fixing plate 341 toward the outer circumferential surface of the image forming drum 32. Specifically, the ink ejection surface of each recording head 340 is exposed from the lower surface of the head fixing plate 341.

[0043] {Ink tank} The ink tank 342 is a rigid sealed tank made of metal, for example. The ink tank 342 is a functional liquid storage unit that stores ink to be supplied to each recording head 340.

[0044] {Flow path components} The flow path member 343 (see FIG. 4) has a flow path R (see FIG. 4) for supplying ink from the ink tank 342 to each recording head 340. The detailed configuration of the flow path member 343 will be described later.

[0045] (carriage) The carriage 34b holds the head unit 34a. The carriage 34b includes a pair of arm units 344 and two connecting plates 345, 345. The arm units 344 hold the head fixing plate 341 so as to sandwich both ends of the head fixing plate 341. The connecting plates 345, 345 connect the pair of arm units 344 together.

[0046] The carriage 34b is connected to a rail (not shown) that extends in a direction intersecting (for example, a direction perpendicular to) the transport direction of the recording medium P. The carriage 34b is disposed so as to be movable along the rail in a direction intersecting the transport direction of the recording medium P. In other words, the carriage 34b supports the multiple head units 34a so as to be individually movable. With this configuration, the ink ejection unit 34 can travel between a printing position where it faces the image forming drum 32 to form an image and a maintenance position that is spaced from the image forming drum 32 in a direction intersecting the transport direction of the recording medium P.

[0047] Fig. 4 is an enlarged view of the vicinity of one recording head 340. Fig. 5 is an explanatory view showing a partial cross-sectional view of an ink flow path unit 100 connecting the recording head 340 and a flow path member 343. The recording head 340 is an ink-circulation type inkjet head having an inlet portion 340a and an outlet portion 340b.

[0048] (Flow path components) The flow path member 343 has a flow path R through which ink flows, supplied from the ink tank 342. The flow path member 343 is made up of two members, a first flow path member 343a and a second flow path member 343b.

[0049] A first flow path Ra is formed in the first flow path member 343a. Ink supplied from the ink tank 342 flows through the first flow path Ra. The first flow path member 343a is made of a metal such as aluminum having excellent thermal conductivity. In addition, a heating member H that heats the ink passing through the first flow path member 343a is provided on the lower surface side of the first flow path member 343a. The heating member H is, for example, a sheath heater.

[0050] The second flow path member 343b is formed with a second flow path Rb. Ink supplied from the first flow path Ra flows through the second flow path Rb. The second flow path member 343b is made of a metal such as aluminum having excellent thermal conductivity. The second flow path member 343b is fixed to the first flow path member 343a by a fixing member such as a bolt B.

[0051] When the second flow path member 343b is fixed to the first flow path member 343a, the first flow path Ra and the second flow path Rb communicate with each other to form one flow path R. When the second flow path member 343b is fixed to the first flow path member 343a, the heat of the heating member H is conducted to the second flow path member 343b. Therefore, the ink passing through the second flow path Rb can also be heated. When removing the recording head 340 for maintenance or the like, the fixing member can be removed to separate the first flow path member 343a and the second flow path member 343b, and the recording head 340 can be easily replaced.

[0052] The ink flow path unit 100 is attached between the inlet portion 340a and the second flow path member 343b of the recording head 340. The ink flow path unit 100 supplies ink from an ink tank 342 to the recording head 340.

[0053] (Ink passage unit) The ink flow path unit 100 is a member that connects the flow path member 343 and the inlet portion 340a of the recording head 340. As shown in Fig. 5, the ink flow path unit 100 includes a first pipe member 110, a second pipe member 120, a heat transfer member 130, an O-ring 140, and the like.

[0054] {First pipe member} The first pipe member 110 is a tubular member made of, for example, aluminum having excellent thermal conductivity. A first end 110a of the first pipe member 110 is connected to the flow path R of the flow path member 343 (the second flow path Rb of the second flow path member 343b).

[0055] {Second pipe member} The second pipe member 120 is a tubular member made of, for example, SUS or the like having excellent heat retention. The second end 110b of the first pipe member 110 is inserted into the first opening 120a of the second pipe member 120. Also, the inlet portion 340a of the recording head 340 is inserted into the second opening 120b of the second pipe member 120. With this configuration, the second pipe member 120 communicates between the first pipe member 110 and the recording head 340.

[0056] <Thermal insulation materials> The second pipe member 120 is provided with a heat insulating member 120c on its circumferential surface, which has heat insulating properties and keeps the heat inside. The heat insulating member 120c is formed by plating the circumferential surface of the second pipe member 120 with, for example, SUS or fluorine-based resin.

[0057] It should be noted that the second pipe member 120 may not be provided with the heat insulating member 120c, and may instead be made of a material having heat insulating properties.

[0058] 5, the first pipe member 110 is inserted to a position closer to the second opening 120b than the center in the longitudinal direction of the second pipe member 120. Therefore, the second pipe member 120 can keep the first pipe member 110 warm over a long range. The first pipe member 110 can supply warmed ink to a position close to the inlet portion 340a of the recording head 340 in a warm state.

[0059] Also, a small gap is provided between the outer peripheral surface of the first pipe member 110 and the inner peripheral surface of the second pipe member 120. Similarly, a small gap is provided between the outer peripheral surface of the inlet portion 340a and the inner peripheral surface of the second pipe member 120. This play allows for deviations in the relative positions of the recording head 340 and the flow path member 343 due to component accuracy, thermal expansion, etc., and positional deviations when adjusting the attitude accuracy of the recording head 340, etc.

[0060] (Heat transfer material) The heat transfer member 130 is a rod-shaped member disposed so as to pass from the flow path R through the first pipe member 110 and reach the inlet 340a1 of the inlet section 340a. The width of the heat transfer member 130 in the ink ejection direction is shorter than the ink flow path of the flow path member 343, the ink flow path unit 100, and the inlet section 340a. Therefore, even if the heat transfer member 130 is disposed, ink still flows through the flow path member 343, the ink flow path unit 100, and the inlet section 340a.

[0061] The heat transfer member 130 transfers heat acquired from the flow path member 343, the first pipe member 110, or the ink to the inflow section 340a. Therefore, from the viewpoints of ink resistance and heat transfer, it is preferable that the heat transfer member 130 is made of metal. In particular, it is preferable that the heat transfer member 130 is made of aluminum.

[0062] 5 illustrates an example in which the heat transfer member 130 is disposed so as to reach the inlet 340a1, but is not limited thereto. The heat transfer member 130 only needs to be able to transfer heat to the inlet 340a. Therefore, the heat transfer member 130 does not need to be disposed so as to reach the inlet 340a1.

[0063] <Holding part> The heat transfer member 130 also includes a holding portion 130a. The holding portion 130a is a protrusion provided to protrude in a direction approximately perpendicular to the flow direction of the ink. As shown in Fig. 5, the holding portion 130a is supported by a support portion 110c provided in the first pipe member 110. The support portion 110c supports the holding portion 130a, thereby defining the position of the heat transfer member 130 in the flow direction of the ink in the ink passage unit 100 (the ink ejection direction of the recording head 340 in Fig. 5).

[0064] If the heat transfer member 130 is free in directions other than the ink flow direction, there is some play in the connection relationship between the flow path member 343 and the recording head 340. This play allows for deviations in the relative positions of the recording head 340 and the flow path member 343 due to component accuracy or thermal expansion, and for positional deviations when adjusting the attitude accuracy of the recording head 340.

[0065] (O-ring) The O-ring 140 is a circular member that connects the first pipe member 110 and the second pipe member 120, or the second pipe member 120 and the inlet portion 340a. The O-ring 140 is elastically deformable. Therefore, the O-ring 140 is pressed against the first pipe member 110 and the second pipe member 120, or the second pipe member 120 and the inlet portion 340a. With this configuration, the O-ring 140 prevents ink from leaking from gaps in the ink flow path unit 100.

[0066] [Effects of the embodiment] As described above, the ink flow path unit 100 according to this embodiment connects the flow path member 343 of the inkjet recording device 1 and the inflow section 340a of the recording head 340. The ink flow path unit 100 also includes a first pipe member 110. The first end 110a of the first pipe member 110 is connected to the flow path R of the flow path member 343. Therefore, the first pipe member 110 transfers heat from the heating member H of the flow path member 343. The ink flow path unit 100 also includes a heat transfer member 130 provided so as to pass from the flow path R through the first pipe member 110. According to this configuration, the heat of the heating member H is transferred to the inflow section 340a via the flow path member 343 and the heat transfer member 130. Therefore, the ink heated by the heating member H can be supplied to the recording head 340 while suppressing a temperature drop.

[0067] Moreover, the heat transfer member 130 is provided so as to reach the inlet 340a1 of the inlet portion 340a. With this configuration, the effect of suppressing the drop in the temperature of the ink can be further improved.

[0068] Moreover, the heat transfer member 130 is made of metal, particularly aluminum. This configuration provides particularly excellent heat transfer properties to the heat transfer member 130. This allows the recording head 340 to eject ink at a higher temperature.

[0069] The heat transfer member 130 also includes a holding portion 130a, which is a protrusion that protrudes in a direction substantially perpendicular to the ink flow direction. The first pipe member 110 also includes a support portion 110c that supports the holding portion 130a and determines the position of the heat transfer member in the ink flow direction. With this configuration, the heat transfer member 130 is free to move in directions other than the ink flow direction. This allows play in the connection relationship between the flow path member 343 and the recording head 340. As a result, deviations in the relative positions of the recording head 340 and the flow path member 343 due to component accuracy or thermal expansion, and positional deviations when adjusting the attitude accuracy of the recording head 340 are allowed.

[0070] The ink flow path unit 100 also includes a second pipe member 120 that connects the first pipe member 110 and the inflow portion 340a. With this configuration, the ink flow path unit 100 is made up of a plurality of members. This allows some play in the connection relationship between the flow path member 343 and the recording head 340. As a result, misalignment of the relative positions of the recording head 340 and the flow path member 343 due to component accuracy or thermal expansion, and misalignment when adjusting the attitude accuracy of the recording head 340 are more tolerated.

[0071] Furthermore, the second pipe member 120 has heat insulating properties. Alternatively, the second pipe member 120 has a heat insulating member 120c on its circumferential surface. With this configuration, the heat retention of the ink flowing through the ink passage unit 100 is further improved.

[0072] [Other configurations] Although the present invention has been specifically described above based on the embodiment, the present invention is not limited to the above embodiment. Of course, the present invention can be modified in various ways within the scope of the invention described in the claims and its equivalents.

[0073] 5, the shape of the inlet portion 340a of the recording head 340 in this embodiment is shown as having a stepped, tapered tip shape, but is not limited thereto. The shape of the inlet portion 340a is not particularly limited as long as it has a small gap between its outer circumferential surface and the inner circumferential surface of the second pipe member 120 and can be connected via the O-ring 140.

[0074] In the above, the ink flow path unit 100 is attached to the inflow portion 340a, but as shown in FIG. 4, the ink flow path unit 100 may also be attached to the discharge portion 340b.

[0075] 5, the support portion 110c is a protrusion, but the present invention is not limited to this. The support portion 110c may be, for example, a slope, as long as it can support the holding portion 130a.

[0076] In addition, in the above, the inkjet recording device 1 that ejects ink has been exemplified as one embodiment of the functional liquid ejection device, but the present invention is not limited to this. In other words, the functional liquid is not limited to ink. The functional liquid ejection device may eject droplets of, for example, a pretreatment agent. [Explanation of symbols]

[0077] 1 Inkjet recording device (functional liquid ejection device) 100 Ink flow path unit (functional liquid flow path unit) 110 First pipe member 110a First end 110b Second end 110c Support part 120 Second pipe member 120c Insulation material 130 Heat transfer components 130a Holding part 340 Recording head (droplet ejection section) 340a Inlet 340a1 Inlet 342 Ink tank (functional liquid storage section) 343 Flow path components H Heating member R flow path

Claims

1. a functional liquid flow path unit that connects a flow path member that has a flow path for flowing a functional liquid supplied from a functional liquid reservoir and is heated by a heating member, and an inlet portion of a droplet discharge portion that discharges the functional liquid, a first pipe member having a first end connected to the flow passage; a heat transfer member provided so as to extend from the flow path through the first pipe member,

2. The functional fluid flow path unit according to claim 1 , wherein the heat transfer member is provided so as to reach an inlet of the inflow portion.

3. The functional fluid flow path unit according to claim 1 , wherein the heat transfer member is made of a metal.

4. 4. The functional fluid flow path unit according to claim 3, wherein the heat transfer member is made of aluminum.

5. the heat transfer member includes a holding portion that is a protrusion that protrudes in a direction substantially perpendicular to a flow direction of the functional liquid; 2 . The functional liquid flow path unit according to claim 1 , wherein the first pipe member includes a support portion that supports the holding portion and determines the position of the heat transfer member in the flow direction of the functional liquid.

6. The functional liquid flow path unit according to claim 1 , further comprising a second pipe member that connects a second end of the first pipe member to the inlet portion.

7. The functional liquid flow path unit according to claim 6 , wherein the second pipe member has a heat insulating property.

8. The functional liquid flow path unit according to claim 6 , further comprising a heat insulating member on a peripheral surface of the second pipe member.

9. a functional liquid storage section for storing a functional liquid; a flow path member having a flow path through which the functional liquid supplied from the functional liquid reservoir flows; A heating member for heating the flow path member; a droplet ejection unit that ejects the functional liquid; A functional liquid ejection device comprising: the functional liquid flow path unit according to claim 1 .

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