JP2021020450A - Liquid discharge device - Google Patents

Abstract

To perform efficient cooling.SOLUTION: A liquid discharge device comprises: a temperature-regulation liquid tank that stores temperature-regulation liquid; a liquid feeding pump that feeds the temperature-regulation liquid; a radiator that cools the temperature-regulation liquid; and a circulation passage for the temperature-regulation liquid including a temperature-regulation liquid supply manifold that distributes and supplies the temperature-regulation liquid to a plurality of heads and a temperature-regulation liquid collection manifold that collects the temperature-regulation liquid from the plurality of heads, where rotation of a fan of the radiator is controlled based on a target temperature of the temperature-regulation liquid, an atmospheric temperature of the radiator and a detection result of inflow temperature of the temperature-regulation liquid at an inlet of the radiator.SELECTED DRAWING: Figure 7

Description

The present invention relates to a device for discharging a liquid.

In the head that discharges the liquid, a pressure generating means such as a piezoelectric element that discharges the liquid, a drive IC (driver IC) such as a switching circuit, and a power amplification unit that is arranged near the head to generate a drive waveform and drive the piezoelectric element. The liquid temperature rises as the temperature rises due to the heat generated by the heat-generating member such as the head drive substrate, and the discharge characteristics fluctuate.

Conventionally, a container for storing a temperature-adjusted temperature control liquid (cooling liquid) and a cooling means for cooling the cooling liquid of the container are provided, and the temperature control liquid from the container is distributed and supplied to a plurality of heads by an outward manifold. Then, it is known that the temperature control liquid is collected from a plurality of heads in the return path manifold and returned to the container (Patent Document 1).

Japanese Unexamined Patent Publication No. 10-86411

By the way, when a temperature control liquid is used, there is a problem that efficient cooling cannot be performed unless the temperature of the temperature control liquid is controlled to a target temperature.

The present invention has been made in view of the above problems, and an object of the present invention is to enable efficient cooling.

In order to solve the above problems, the device for discharging the liquid according to claim 1 of the present invention is
A head that discharges liquid and
A circulation path through which the temperature-adjusted temperature control liquid circulates,
A cooling means for cooling the temperature control liquid is provided.
The cooling means is a radiator,
A means for controlling the rotation of the fan of the radiator is provided based on each detection result of the target temperature of the temperature control liquid, the atmospheric temperature of the radiator, and the temperature of the temperature control liquid at the inlet of the radiator. It was configured.

According to the present invention, efficient cooling can be performed.

It is the schematic explanatory drawing of the printing apparatus as the apparatus which ejects the liquid which concerns on 1st Embodiment of this invention. It is a plane explanatory view of the head unit constituting the discharge unit of this apparatus seen from the nozzle surface side. It is sectional drawing in the short side direction (the direction orthogonal to the nozzle arrangement direction) of an example of a head. It is a plane explanatory view of the temperature control liquid flow path in line AA of FIG. It is a block explanatory drawing which provides the explanation of the liquid supply system and the circulation path system of a temperature control liquid in 1st Embodiment of this invention. It is a block explanatory drawing which provides the explanation of the part which concerns the temperature control of a temperature control liquid. It is a flow chart which provides the explanation of the temperature control of the temperature control liquid by the temperature control liquid temperature control means. Similarly, it is explanatory drawing which provides an example of the relationship between the detection temperature and the head drive substrate duty. Similarly, it is explanatory drawing which provides the explanation of an example of the relationship between the detection temperature and the drive duty of a fan of a radiator. It is explanatory drawing which provides the explanation of the temperature control liquid circulation system in 2nd Embodiment of this invention. It is explanatory drawing which provides the explanation of the temperature control liquid circulation system in 3rd Embodiment of this invention. It is a block explanatory diagram provided for the explanation of the liquid (ink) supply system and the temperature control liquid circulation path system in the 4th Embodiment of this invention. It is a schematic explanatory drawing provided for the explanation of the connection relationship between a temperature control liquid supply manifold, a temperature control liquid recovery manifold, and a head. It is explanatory drawing explaining the structure of the head unit and the circulation path of a temperature control liquid which concerns on 5th Embodiment of this invention. It is an external perspective explanatory view of an example of an ink supply manifold. It is an external perspective explanatory view of the temperature control liquid supply manifold. It is sectional drawing which shows the same temperature control liquid supply manifold. It is a perspective explanatory view of the assembled state of an ink supply manifold and a temperature control liquid supply manifold. It is a perspective explanatory view of the manifold which concerns on 6th Embodiment of this invention. It is also a cross-sectional explanatory view. It is a right sectional view which provides the detailed description of the temperature control liquid flow path of a temperature control liquid recovery manifold. It is a perspective explanatory view of the connection part of the same temperature control liquid recovery manifold and a head drive substrate. It is also an exploded perspective explanatory view. It is sectional drawing which shows the positional relationship of a head, a temperature control liquid supply manifold, and a temperature control liquid recovery manifold. It is a plane explanatory view of the printing apparatus as the apparatus which discharges a liquid which concerns on 7th Embodiment of this invention.

Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings. A printing device as a device for discharging a liquid according to the first embodiment of the present invention will be described with reference to FIG. FIG. 1 is a schematic explanatory view of the printing apparatus.

The printing device 1 includes a carry-in section 10 for carrying in the sheet material P, a pretreatment section 20, a printing section 30, a drying section 40, a carry-out section 50, and a reversing mechanism section 60. In the printing apparatus 1, the pretreatment unit 20, which is a pretreatment means, applies (coats) a pretreatment liquid to the sheet material P, which is carried (supplied) from the carry-in unit 10, as needed, and the printing unit 30 applies (coats) a liquid. Is applied to perform the required printing, the liquid adhering to the sheet material P is dried by the drying unit 40, and then the sheet material P is discharged to the carry-out unit 50.

The carry-in unit 10 separates the carry-in tray 11 (lower carry-in tray 11A, upper carry-in tray 11B) for accommodating a plurality of sheet materials P and the sheet material P from the carry-in tray 11 and sends them out one by one (12A). , 12B), and the sheet material P is supplied to the pretreatment section 20.

The pretreatment section 20 includes, for example, a coating section 21 which is a treatment liquid applying means for aggregating the color material of the ink and applying a treatment liquid having an effect of preventing show-through to the printed surface of the sheet material P. ..

The printing unit 30 includes a drum 31 which is a supporting member (rotating body) that supports the sheet material P on the peripheral surface and rotates, and a liquid discharge unit 32 that discharges a liquid toward the sheet material P supported on the drum 31. I have.

Further, the printing unit 30 receives the sheet material P sent from the pretreatment unit 20 and passes the sheet material P to and from the drum 31, and receives and dries the sheet material P conveyed by the drum 31. The delivery drum 35 to be handed over to the unit 40 is provided.

The tip of the sheet material P transported from the pretreatment unit 20 to the printing unit 30 is gripped by a gripping means (sheet gripper) provided on the transfer cylinder 34, and is conveyed as the transfer cylinder 34 rotates. The sheet material P conveyed by the transfer cylinder 34 is delivered to the drum 31 at a position facing the drum 31.

A gripping means (seat gripper) is also provided on the surface of the drum 31, and the tip of the sheet material P is gripped by the gripping means (seat gripper). A plurality of suction holes are dispersedly formed on the surface of the drum 31, and a suction airflow is generated inward from the required suction holes of the drum 31 by the suction means.

The tip of the sheet material P delivered from the transfer cylinder 34 to the drum 31 is gripped by the sheet gripper, and is attracted and supported on the drum 31 by the suction airflow by the suction means, and is conveyed as the drum 31 rotates. Will be done.

The liquid discharge unit 32 includes a discharge unit 33 (33A to 33D) which is a liquid discharge means. For example, the discharge unit 33A uses a cyan (C) liquid, the discharge unit 33B uses a magenta (M) liquid, the discharge unit 33C uses a yellow (Y) liquid, and the discharge unit 33D uses a black (K) liquid. Discharge each. In addition, a discharge unit that discharges a special liquid such as white or gold (silver) can also be used.

The discharge operation of each discharge unit 33 of the liquid discharge unit 32 is controlled by a drive signal corresponding to the print information. When the sheet material P supported on the drum 31 passes through the region facing the liquid discharge unit 32, the liquids of each color are discharged from the discharge unit 33, and an image corresponding to the print information is printed.

The drying unit 40 dries the liquid adhering to the sheet material P at the printing unit 30. As a result, the liquid content such as water in the liquid evaporates, the colorant contained in the liquid is fixed on the sheet material P, and the curl of the sheet material P is suppressed.

The reversing mechanism unit 60 is a mechanism for reversing the sheet material P by a switchback method when double-sided printing is performed on the sheet material P that has passed through the drying unit 40, and the inverted sheet material P is the printing unit 30. It is sent back to the upstream side of the delivery cylinder 34 through the transport path 61 of the above.

The carry-out unit 50 includes a carry-out tray 51 on which a plurality of sheet materials P are loaded. The sheet material P conveyed through the reversing mechanism unit 60 is sequentially stacked and held on the carry-out tray 51.

Next, an example of the head unit constituting the discharge unit will be described with reference to FIG. FIG. 2 is a plan explanatory view of the head unit as viewed from the nozzle surface side.

The head unit 300 is formed by arranging a plurality of heads 100 for discharging liquid in a staggered manner on a head mounting member 302.

Each head 100 has a plurality of rows of nozzles (here, four rows are taken as an example, but the present invention is not limited) in which a plurality of nozzles 104 for discharging liquid are arranged.

Next, an example of the head 100 will be described with reference to FIGS. 3 to 5. FIG. 3 is a cross-sectional explanatory view of the head in the lateral direction (direction orthogonal to the nozzle arrangement direction), and FIG. 4 is a plan explanatory view of the temperature control liquid flow path in the line AA of FIG.

In the head 100, a nozzle plate 101 forming the nozzle 104, a flow path plate 102 forming a flow path such as a pressure chamber 106 leading to the nozzle 104, and a diaphragm 103 forming a wall surface of the pressure chamber 106 are sequentially laminated. There is. Further, the head 100 has a piezoelectric actuator 111 as a pressure generating means and a frame member 120 which also serves as a common flow path member.

The piezoelectric actuator 111 has a plurality of columnar piezoelectric elements 112 fixed on the base member 113, and the piezoelectric elements 112 are joined to the diaphragm 103. Further, a wiring member 115 such as a flexible wiring board is connected to the piezoelectric element 112.

The frame member 120 that also serves as the common flow path member forms the common supply flow path 110 that supplies the liquid (ink) to be discharged to the pressure chamber 106.

A temperature control liquid flow path member 131 forming a temperature control liquid flow path 130 in the head 100 for flowing a temperature control liquid (a liquid whose temperature has been adjusted) is joined to the frame member 120. The temperature control liquid flow path member 131 has a temperature control liquid supply port 132 for supplying the temperature control liquid to the temperature control liquid flow path 130, and a temperature control liquid recovery port 133 for collecting the temperature control liquid to the outside. There is.

As a result, in the head 100, the common supply flow path 110, which is the ink flow path, and the temperature control liquid flow path 130 are thermally coupled. Further, the frame member 120 that also serves as the housing portion of the head 100 forms the wall surface of the liquid adjusting flow path 130, and is thermally coupled to the temperature controlling liquid flow path 130.

A case member 150 and a lid member 151 are sequentially laminated on the temperature control liquid flow path member 131.

Next, the liquid (ink) supply system and the temperature control liquid circulation path system according to the first embodiment of the present invention will be described with reference to the block explanatory diagram of FIG.

The ink supply system includes a liquid tank (ink tank) 401 that stores the liquid (ink) supplied to the head 100, and an ink that is a liquid supply manifold that distributes and supplies the ink supplied from the liquid tank 401 to a plurality of heads 100. It includes a supply manifold 402. The ink supply manifold 402 and each head 100 are connected by a supply path 403 such as a supply tube.

The temperature control liquid circulation system includes a temperature control liquid tank 501 for storing the temperature control liquid 510, a liquid feed pump 502 for sending the temperature control liquid, and a radiator 511 which is a cooling means for cooling the temperature control liquid. It includes a temperature control liquid supply manifold 505 that distributes and supplies the temperature control liquid to the head 100, and a temperature control liquid recovery manifold 506 that recovers the temperature control liquid from each head 100.

The temperature control liquid supply manifold 505 and the temperature control liquid supply port 132 of each head 100 are connected by a supply path 513 such as a supply tube, and the temperature control liquid recovery port 133 of each head 100 and the temperature control liquid recovery manifold 506 are collected. It is connected by a collection path 514 such as a tube.

By driving the liquid feed pump 502, the temperature control liquid 510 stored in the temperature control liquid tank 501 is the liquid feed pump 502, the radiator 511 as a cooling means, the temperature control liquid supply manifold 505, each head 100, and the temperature control. It circulates through the circulation path 500 returning to the temperature control liquid tank 501 via the liquid recovery manifold 506.

Then, the head drive substrate 160 is thermally coupled to the temperature control liquid recovery manifold 506 on which a power amplification unit or the like that generates a drive waveform to be given to the piezoelectric actuators 111 of the plurality of heads 100 and amplifies the waveform is mounted.

In the system configured in this way, the temperature control liquid 510 is pumped from the temperature control liquid tank 501 by the liquid feed pump 502, passes through the radiator 511, and is distributed from the temperature control liquid supply manifold 505 to each head 100.

Then, the frame member 120 of each head 100 is cooled by passing through the temperature control liquid flow path 130 of each head 100, and after passing through each head 100, the power amplification unit of the head drive board 160 is used in the temperature control liquid recovery manifold 506. Is cooled and recovered, and returned to the temperature control liquid tank 501.

On the other hand, the ink is supplied from the ink tank 401 to the ink supply manifold 402 and distributed to each head 100.

Next, the portion related to the temperature control of the temperature control liquid will be described with reference to the block explanatory diagram of FIG.

The temperature control liquid temperature control means 801 inputs the detection result of the environmental temperature sensor 811 that detects the atmospheric temperature T5 of the radiator 511. The radiator 511 is arranged outside the apparatus in order to avoid the influence of the temperature rise inside the apparatus, and the ambient temperature T5 of the radiator 511 is the same as the ambient temperature of the printing apparatus 1. It is preferable that the environmental temperature sensor 811 is also arranged outside the device.

The temperature control liquid temperature control means 801 is referred to as the temperature of the temperature control liquid at the inlet of the radiator 511 (hereinafter referred to as the inflow temperature). ) Input the detection results of the radiator inlet temperature sensor 812 that detects T1 and the radiator outlet temperature sensor 813 that detects the temperature of the temperature control liquid at the outlet of the radiator 511 (hereinafter referred to as "outflow temperature") T3.

The temperature control liquid temperature control means 801 inputs a detection result such as a rotation speed sensor 814 that detects the rotation speed of the fan 511a of the radiator 511.

Then, the temperature control liquid temperature control means 801 performs rotation drive control of the fan 511a of the radiator 511 based on these input detection results.

Further, the temperature control liquid temperature control means 801 applies a heating waveform to the head drive substrate 160 based on the input temperature detection result, and controls to heat the temperature control liquid 510. The head drive substrate 160 is a substrate equipped with a waveform power amplification function (circuit) for generating a drive waveform and driving the piezoelectric element 112, and a function (circuit) for controlling the head 100. ..

The amount of heat generated can be controlled by controlling the drive frequency of the heating drive waveform given to the head drive substrate 160 and the piezoelectric element 112. For example, when the environmental temperature is 10 ° C., the head drive substrate 160 is heated with a calorific value of 8 KW (40 KHz) to steeply raise the temperature in the circulation path 500. As the normal temperature of the ink temperature control target is reached, the drive frequency is reduced so as to reduce the amount of heat generated in order to avoid overshoot.

Further, the temperature control liquid temperature control means 801 controls the drive of the liquid feed pump 502 to circulate the temperature control liquid 510.

Next, the temperature control of the temperature control liquid by the temperature control liquid temperature control means will be described with reference to FIGS. 7 to 9. FIG. 7 is a flow chart for explaining the temperature control. FIG. 8 is an explanatory diagram for explaining an example of the relationship between the detected temperature and the head drive substrate duty, and FIG. 9 is an explanatory diagram for explaining an example of the relationship between the detected temperature and the drive duty of the radiator fan.

The temperature control liquid temperature control means 801 determines whether or not the ambient temperature T5 is less than 10 ° C. (10 ° C.> T5) or exceeds 32 ° C. (32 ° C. <T5) when the device start-up process is started (step S1). , Hereinafter, it is simply referred to as "S1".)

Here, when the ambient temperature T5 of the radiator 511 is less than 10 ° C. or exceeds 32 ° C., an alarm is displayed as out of the operating environment temperature range (S2).

On the other hand, when the atmospheric temperature T5 of the radiator 511 is 10 ° C. or higher or 32 ° C. or lower, it is determined whether or not the atmospheric temperature T5 of the radiator 511 is less than 23 ° C. (T5 <23 ° C.) (S3).

Then, when the atmospheric temperature T5 of the radiator 511 is less than 23 ° C., the liquid feed pump 502 is driven to start up in a low temperature atmosphere, and a predetermined voltage (for example, 36 V) is supplied to the head drive substrate 160. , The intermediate potential of the piezoelectric element 112 of the head 100 is turned on (S4).

Then, based on the detection result of the inflow temperature T1 at the inlet of the radiator 511, for example, the drive duty (frequency) of the heating waveform of the head drive substrate 160 as shown in FIG. 8 is controlled (S5).

After that, for example, it is determined whether or not the inflow temperature T1 at the inlet of the radiator 511 has reached 23 ° C. or higher (23 ° C. ≤ T1), which is a predetermined temperature (threshold temperature) (S6), and 23 ° C. ≤ T1. The process of steps S5 and S6 is repeated until the result is reached.

Then, when 23 ° C. ≦ T1, the state shifts to the print standby state.

On the other hand, in step S3, when the atmospheric temperature T5 of the radiator 511 is not less than 23 ° C., that is, when the atmospheric temperature T5 is 23 ° C. or higher, the liquid feed pump 502 is driven as a start-up in a high temperature environment. A predetermined voltage (for example, 36V) is supplied to the head drive substrate 160, the intermediate potential of the piezoelectric element 112 of the head 100 is turned on, and the fan 511a of the radiator 511 is rotated (ON) (S7).

After that, based on the detection result of the inflow temperature T1 at the inlet of the radiator 511, for example, the fan 511a is driven by PWM control according to the drive duty of the fan 511a as shown in FIG. 9 (S8).

After that, for example, it is determined whether or not the inflow temperature T1 at the inlet of the radiator 511 becomes the threshold temperature 23 ° C. or higher (23 ° C. ≤ T1) (S9), and the processes of steps S8 and S9 until 23 ° C. ≤ T1 is satisfied. repeat.

Then, when 23 ° C. ≦ T1, the state shifts to the print standby state.

In this way, based on the predetermined temperature (threshold temperature) of the temperature control liquid, the ambient temperature of the radiator, and the detection results of the inflow temperature T1 of the temperature control liquid 510 at the inlet of the radiator 511a, the radiator 511 By controlling the rotation of the fan 511a, the temperature of the temperature control liquid can be controlled with good responsiveness. As a result, efficient cooling can be performed.

The target temperature (target temperature: predetermined temperature, threshold temperature) of the temperature control liquid 510 is not limited to the above-mentioned "23 ° C.".

Next, the second embodiment of the present invention will be described with reference to FIG. FIG. 10 is an explanatory diagram provided for explaining the temperature control liquid circulation system in the same embodiment.

In the present embodiment, the temperature control liquid supply manifold 505 (505A to 505D) and the temperature control liquid recovery manifold correspond to the plurality of head units 300 (300A to 300D) including the plurality of heads 100 of the first embodiment. It is equipped with 506 (506A to 506D).

Then, a common temperature control liquid tank 501 is provided, and the temperature control liquid supply manifold 505 is provided from the common temperature control liquid tank 501 via the liquid feed pumps 502 (502A to 502D) and the radiator 511 (511A to 511D), respectively. The temperature control liquid 510 is branched and supplied to (505A to 505D).

On the other hand, the temperature control liquid 510 that has passed through the head unit 300 is recovered by the temperature control liquid recovery manifolds 506 (506A to 506D), respectively, and then the temperature control liquid recovery manifolds 506A and 506B and the temperature control liquid recovery manifolds 506C and 506D. It is aggregated into two groups and returned to the temperature control liquid tank 501.

Therefore, the circulation path 500A is a path returning from the temperature control liquid tank 501 to the temperature control liquid tank 501 via the liquid feed pump 502A, the radiator 511A, the temperature control liquid supply manifold 505A, the head unit 300A, and the temperature control liquid recovery manifold 506A. Become.

Similarly, the circulation path 500B is a path returning from the temperature control liquid tank 501 to the temperature control liquid tank 501 via the liquid feed pump 502B, the radiator 511B, the temperature control liquid supply manifold 505B, the head unit 300B, and the temperature control liquid recovery manifold 506B. It becomes.

The circulation path 500C is a path that returns from the temperature control liquid tank 501 to the temperature control liquid tank 501 via the liquid feed pump 502C, the radiator 511C, the temperature control liquid supply manifold 505C, the head unit 300C, and the temperature control liquid recovery manifold 506C.

The circulation path 500D is a path from the temperature control liquid tank 501 to the temperature control liquid tank 501 via the liquid feed pump 502D, the radiator 511D, the temperature control liquid supply manifold 505D, the head unit 300D, and the temperature control liquid recovery manifold 506D.

As described above, in the present embodiment, the radiator 511 is connected in parallel for each head unit 300.

Thereby, the target temperature can be set according to the viscosity of the liquid discharged by each head unit 300, and the cooling of the temperature control liquid 510 by the radiator 511 can be controlled.

For example, when white ink using titanium oxide or the like as a coloring material or clear ink forming a transparent layer on the surface layer is formulated to have a dilute high viscosity in order to avoid settling and permeation, the ink and head are ejected. The temperature is raised and the ink is discharged according to the head characteristics.

Therefore, for example, the target temperature of the stage 511a of the radiator 511 connected in parallel is changed to change the outlet temperature of the temperature control liquid 510 of the radiator 511, and the temperature of the head 100 and the ink is adjusted according to the viscosity of the discharged liquid. ..

For example, for KCMY, 6 mPa · s (at 23 ° C environment) ink adjusts the temperature of the temperature control liquid to 23 ° C, and for clear ink and white ink, 6 mPa · s (at 27 ° C environment) ink is the temperature control liquid. To 27 ° C.

In this way, the temperature control temperature can be changed even for inks having different viscosity characteristics in an environment of room temperature, and stable ejection characteristics can be obtained.

In this embodiment, four radiators 511 are used and connected in parallel, but for each head unit, a plurality of radiators are connected in series, in parallel, or a cooling means in which series connection and parallel connection are mixed is arranged. You can also do it.

Next, the third embodiment of the present invention will be described with reference to FIG. FIG. 11 is an explanatory diagram provided for explaining the temperature control liquid circulation system in the same embodiment.

In the present embodiment, the temperature control liquid supply manifold 505 (505A to 505D) and the temperature control liquid recovery manifold correspond to the plurality of head units 300 (33A to 33D) including the plurality of heads 100 of the first embodiment. It is equipped with 506 (506A to 506D).

A common temperature control liquid tank 501 is provided. The temperature control liquid 510 is branched and supplied from the common temperature control liquid tank 501 to the temperature control liquid supply manifolds 505A and 505B via the liquid feed pump 502A and the radiator 511A (direct connection of 511A1 and 511A2).

Further, the temperature control liquid 510 is branched and supplied from the common temperature control liquid tank 501 to the temperature control liquid supply manifolds 505C and 505D via the liquid feed pump 502B and the radiator 511B (direct connection of 511B1 and 511B2).

On the other hand, the temperature control liquid 510 that has passed through the head unit 300 is collected by the temperature control liquid recovery manifolds 506 (506A to 506D), then aggregated into one and returned to the temperature control liquid tank 501.

Therefore, the circulation path 500A is warmed from the temperature control liquid tank 501 through the liquid feed pump 502A, the radiators 511A1, 511A2, the temperature control liquid supply manifolds 505A and 505B, the head units 300A and 33B, and the temperature control liquid recovery manifolds 506A and 506B. This is the route back to the liquid preparation tank 501.

Similarly, the circulation path 500B passes from the temperature control liquid tank 501 through the liquid feed pump 502B, the radiators 511B1, 511B2, the temperature control liquid supply manifolds 505C and 505D, the head units 300C and 33D, and the temperature control liquid recovery manifolds 506C and 506D. This is the route back to the temperature control liquid tank 501.

Further, each temperature control liquid recovery manifold 506 and the head drive board 160 are thermally coupled to cool the power amplification unit that amplifies the drive waveform of the MOS-FET or the like mounted on the head drive board 160.

In the present embodiment, a plurality of heads 100 and a plurality of head drive substrates (head drive units) for driving each head 100, that is, the total calorific value of the cooling target thermally coupled to the circulation path 500 is Q, and a liquid is applied. The limit coefficient that defines the upper limit of the applied amount in the sheet material P that is the applied member is α, the inflow temperature of the temperature control liquid 510 into the radiator 511 is T1, the air flow temperature (atmospheric temperature) of the radiator is T5, and the radiator 511. Let the thermal resistance value of be Rr.

At this time, in this temperature control liquid circulation system,
Q × α = (T1-T5) / Rr,
The relationship is established.

That is, the temperature control liquid tank 501 on the circulation path 500 of the temperature control liquid 510 that cools the four head units (in addition, the head drive unit: the head drive board 160) is integrated into one. The temperature of the temperature control liquid 510 in 501 is an increase in temperature corresponding to the calorific value corresponding to the upper limit of the amount of ink applied to the sheet material P.

For example, when a head unit 300 that discharges four colors of KCMY is provided and each head unit 300 is composed of 11 heads 100, the total amount of heat generated by each head 100 of the head unit 300 and each head drive board 160 is It will be approximately 12Kw. When the sheet material P is coated paper, for example, when drawing under the conditions of a droplet size of 2 pl and a resolution of 1200 dpi, the ink limit coefficient is 1/2, so that the temperature control on the temperature control liquid circulation path 500 When the liquid tanks 501 are integrated (commonly used) and cooled, the scale of the cooling device can be reduced to about 1/2 as compared with the case where four temperature control liquid tanks are provided.

Further, in the present embodiment, the calorific value of the head 100 and the head drive board 160 of the head unit 300 is 6 Kw even when the ink limit upper limit value is taken into consideration, so that the radiators 511 are connected in series) are mixed in parallel. I am using it for connection.

The calorific value Q1 and the maximum cooling capacity when the two radiators 511 are directly connected are Q1 × α = (T1-T5) / Rr + (T11-T5) / Rr. Since two sets of these are connected in parallel, the relationship between the calorific value Q and the maximum cooling capacity is Q × α = 2 × {(T1-T5) / Rr + (T11-T5) / Rr}.

In addition, T11 is the temperature (outflow temperature) of the temperature control liquid at the outlet of the first stage radiators 511A1 and 511B1 connected in series.

In this embodiment, four radiators 511 are used as cooling means, and two radiators connected in series are connected in parallel to form a mixed connection. However, as in the second embodiment, four radiators are connected. The radiator 511 may be connected in parallel. Further, it is possible to arrange a cooling means in which a plurality of radiators are connected in series, in parallel, or a mixture of series connection and parallel connection.

Next, a fourth embodiment of the present invention will be described with reference to FIG. FIG. 12 is a block explanatory diagram provided for explaining the liquid (ink) supply system and the temperature control liquid circulation path system in the same embodiment.

The temperature control liquid circulation system of the present embodiment includes a heat exchanger 503 that exchanges heat with the temperature control liquid. The heat exchanger 503 includes a radiator 511 which is a cooling means for cooling the temperature control liquid, and a heating heater 512 which is a heating means for heating the temperature control liquid.

By driving the liquid feed pump 502, the temperature control liquid stored in the temperature control liquid tank 501 is the liquid feed pump 502, the heat exchanger 503, the temperature control liquid supply manifold 505, each head 100, and the temperature control liquid recovery manifold. It circulates through the circulation path 500 returning to the temperature control liquid tank 501 via 506.

Further, in the present embodiment, the ink supply manifold 402 and the temperature control liquid supply manifold 505 are thermally coupled.

As a result, the temperature of the ink can be adjusted to a required temperature before the ink of each head 100 is supplied, and stable ejection can be performed.

The rotation control of the fan of the radiator 511 can be performed in the same manner as in the first embodiment.

Next, the connection relationship between the temperature control liquid supply manifold and the temperature control liquid recovery manifold and the head will be described with reference to FIG. FIG. 13 is a schematic explanatory view for the same explanation.

It is connected to the inlet of the temperature control liquid recovery manifold 506 on the most upstream side from the first outlet port of the liquid flow path 551 of the temperature control liquid supply manifold 505 via the head 100. Hereinafter, similarly, the second outlet port from the most upstream side of the liquid flow path 551 is connected to the second inlet from the most upstream side of the liquid flow path 561 of the temperature control liquid recovery manifold 506 via the head 100. Then, it is connected from the outlet port on the most downstream side of the liquid flow path 551 to the inlet on the most downstream side of the liquid flow path 561 of the temperature control liquid recovery manifold 506 via the head 100.

By making such a connection relationship, the flow control liquid flow path configurations passing through all the heads 100 are aligned, the pressure loss of the temperature control liquid flow path through each head becomes equal, and the flow rate and flow velocity become the same. Therefore, the temperature of all heads can be adjusted evenly.

In this case, the temperature control liquid recovery manifold 506 is preferably made of the same material and the same length as the temperature control liquid supply manifold 505. For example, by manufacturing the temperature control liquid supply manifold 505 and the temperature control liquid recovery manifold 506 by extrusion molding using an aluminum extruded material such as A6063, the manufacturing cost can be suppressed.

Next, a fifth embodiment of the present invention will be described with reference to FIG. FIG. 14 is an explanatory diagram illustrating the configuration of the head unit and the circulation path of the temperature control liquid according to the embodiment.

The head unit 300 is formed by arranging two sets of heads (dual heads) 100, 100 for discharging liquid in a staggered pattern.

Then, the temperature control liquid was supplied from the temperature control liquid supply manifold 505 to the temperature control liquid supply port 132 of one of the two heads 100 and 100, and passed through the frame member 120 of the one head 100. The temperature control liquid is collected from the temperature control liquid recovery port 133. The temperature control liquid collected from one head 100 is supplied to the temperature control liquid supply port 132 of the other head 100, and the temperature control liquid that has passed through the frame member 120 of the other head 100 is collected from the temperature control liquid recovery port 133. .. The two sets of heads 100 may be a combination of heads arranged in a staggered pattern. Further, the configuration may be such that two sets of heads 100 are used in an overlapping manner for high-density recording.

The temperature control liquid collected from the temperature control liquid recovery port 133 of the other head 100 is collected in the temperature control liquid recovery manifold 506.

Next, an example of the above-mentioned ink supply manifold, temperature control liquid supply manifold, and thermal coupling between them will be described with reference to FIGS. 15 to 17. 15 is an external perspective explanatory view of an example of the ink supply manifold, FIG. 16 is an external perspective explanatory view of the temperature control liquid supply manifold, FIG. 17 is a cross-sectional explanatory view of the same temperature control liquid supply manifold, and FIG. 18 is an ink supply manifold and temperature. It is a perspective explanatory view of the assembled state of a liquid-conditioning supply manifold.

The ink supply manifold 402 is a tubular member in which an ink supply flow path 420, which is a liquid supply path, is formed, and supplies ink to an inlet port 421 to which ink is supplied from the ink tank 401 and to each head 100. It is provided with an exit port 422.

The temperature control liquid supply manifold 505 is a plate-shaped member in which a flow path of the temperature control liquid 510 is formed, and heats the inlet port 555 to which the temperature control liquid 510 is supplied from the heat exchanger 503 and each head 100. It is provided with an outlet port 556 for supplying the liquid preparation 510. The temperature control liquid supply manifold 505 includes a manifold main body 552 in which a plurality of liquid flow paths 551a to 551d are formed along the longitudinal direction, and a folded-back portion cap 555 attached to both ends of the manifold main body 552. ing.

As a result, the plurality of liquid flow paths 551a to 551d are folded back at the flow path of the folded-back portion cap 553 to form the temperature control liquid flow path 551. When the temperature control liquid flow path 551 has the folded liquid flow paths 551a to 551d, the temperature gradient of the temperature control liquid inside the temperature control liquid supply manifold 505 can be reduced.

The liquid flow path 551d is provided with an outlet port 556 for supplying the temperature control liquid 510 to each head 100. The temperature control liquid 510 is supplied from the outlet port 556 to the temperature control liquid supply port 132 via the supply path 513.

A fitting portion 558 for fitting the ink supply manifold 402 is formed on the side surface of the manifold body 552 of the temperature control liquid supply manifold 505. Two fitting portions 558 are provided along the longitudinal direction of the manifold main body 552.

Then, as shown in FIG. 18, by fitting the ink supply manifold 402 to the fitting portion 558 of the manifold body 552 of the temperature control liquid supply manifold 505, the temperature control liquid supply manifold 505 and the ink supply manifold 402 are thermally coupled. Will be done. Here, the ink supply manifold 402 in the upper stage supplies ink to the head 100 on the upstream side in the transport direction shown in FIG. 2 from the outlet port 422, respectively. Then, the ink supply manifold 402 in the lower stage supplies ink to the head 100 on the downstream side in the transport direction shown in FIG. 2 from the outlet port 422, respectively.

By thermally coupling the temperature control liquid supply manifold 505 and the ink supply manifold 402 in this way, the ink supply flow path 420 and the circulation path 500, which are the liquid supply paths, are thermally coupled.

As a result, the ink temperature can be adjusted before the ink is supplied to the plurality of heads 100, and the variation (temperature gradient) in the temperature of the ink supplied between the heads 100 is reduced. Therefore, the variation in the discharge characteristics of each head 100 is reduced.

Next, the sixth embodiment of the present invention will be described with reference to FIGS. 19 and 20. FIG. 19 is a perspective explanatory view of the manifold in the same embodiment, and FIG. 20 is a cross-sectional explanatory view.

The present embodiment includes a manifold 600 in which the temperature control liquid supply manifold 505 and the ink supply manifold 402 described in the above embodiment are integrated members. In other words, the manifold 600 is a member that distributes and supplies the liquid (ink) and the temperature control liquid 510 to the plurality of heads 100.

In the manifold 600, a liquid flow path 551, which is a second flow path through which the temperature control liquid 510 flows, and an ink supply flow path 420, which is a first flow path through which ink flows, are formed in the manifold body 601. The liquid flow path 551 is connected to the temperature control liquid supply port 132 of each head 100 by a supply path 513 such as a supply tube. The ink supply flow path 420 is connected to each head 100 through the outlet port 422.

At this time, as shown in FIG. 20, it is preferable to arrange the ink supply flow path 420 between the two liquid flow paths 551 of the temperature control liquid 510.

Also in this embodiment, the temperature control liquid flow path 551 and the ink supply flow path 420 are thermally coupled. Therefore, the ink temperature can be adjusted before the ink is supplied to the plurality of heads 100, and the variation (temperature gradient) in the temperature of the ink supplied between the heads 100 is reduced. As a result, the variation in the discharge characteristics of each head 100 is reduced.

The manifold 600 in which the temperature control liquid supply manifold 505 and the ink supply manifold 402 are integrated as in the present embodiment can be easily modeled by, for example, a three-dimensional modeling apparatus (3D printer).

Next, an example of thermal coupling between the temperature control liquid recovery manifold and the temperature control liquid recovery manifold and the head drive substrate 160 described above will be described with reference to FIGS. 21 to 23. FIG. 21 is an explanatory cross-sectional view provided for detailed explanation of the temperature control liquid flow path of the temperature control liquid recovery manifold. FIG. 22 is a perspective explanatory view of a joint portion between the same temperature control liquid recovery manifold and the head drive substrate 160, and FIG. 23 is an exploded perspective explanatory view.

The temperature control liquid recovery manifold 506 is formed with a temperature control liquid flow path 561 in which the temperature control liquid 510 supplied from the head 100 through the recovery path 514 flows in the direction of arrow A. Further, the temperature control liquid recovery manifold 506 includes an inlet port B connected to a plurality of recovery paths 514 and an outlet port C for discharging the temperature control liquid to the temperature control liquid tank 501.
The temperature control liquid flow path 561 is provided with a plurality of liquid flow paths along the longitudinal direction and folded flow paths at both ends.

A power amplification unit 161 composed of a MOS-FET that amplifies the drive waveform is mounted on the head drive substrate 160, and a heat sink 162 is provided in contact with the power amplification unit 161.

Therefore, by fixing the heat sink 162 of the head drive board 160 and the temperature control liquid recovery manifold 506 via the heat conductive sheet 163, the temperature control liquid recovery manifold 506 and the power amplification unit 161 of the head drive board 160 are thermally coupled. doing.

Next, the positional relationship between the head 100, the temperature control liquid supply manifold 505, and the temperature control liquid recovery manifold 506 will be described with reference to FIG. 24. FIG. 24 is an explanatory diagram for the same explanation.

The temperature control liquid recovery manifold 506 and the temperature control liquid supply manifold 505 are arranged above the head 100.

As a result, high image quality can be obtained without reducing the nozzle density (head arrangement density) of the head 100. Further, the distance between the ink supply path 403 and the temperature control liquid supply path 513 can be shortened, and the temperature change in each supply path can be suppressed to be small.

Further, the frame member 120 of the head 100, which is smaller than the heat generation amount of the head drive board 160, is arranged below the head drive board 160, and the frame member 120 of the head 100 and the head drive board 160 are thermally coupled to the circulation path 500 in this order. doing. A head drive substrate 160 that is thermally coupled to the temperature control liquid recovery manifold 506 is arranged above the head 100.

As a result, the order of cooling by the temperature control liquid is in ascending order of the amount of heat generated, so that efficient cooling can be performed and the temperature rise of the head 100 can be suppressed.

Further, the head unit 300, the temperature control liquid recovery manifold 506, and the temperature control liquid supply manifold 505 are integrated by the cover 1000. Therefore, maintainability is improved.

Next, a seventh embodiment of the present invention will be described with reference to FIG. FIG. 25 is a plan explanatory view of a printing device as a device for discharging a liquid according to the same embodiment.

The printing device 1 is a serial printing device. A guide member such as a guide member 1001 straddling the left and right side plates 1010A and 1010B holds the carriage 1003 so as to be reciprocally movable in the main scanning direction. Then, the carriage 1003 is reciprocated in the main scanning direction by the main scanning motor 1005 via the timing belt 1008 bridged between the drive pulley 1006 and the driven pulley 1007.

The carriage 1003 is equipped with four liquid discharge units 1004. The liquid discharge unit 1004 is configured by integrating the head (liquid discharge head) 100 and the sub tank 1035.

The sub tank 1035 is provided with a tank portion for accommodating liquids of each color to be supplied to each head 100.

A cartridge holder 1051 to which the main tank 1050 (1050a to 1050f) containing the liquids of each color is replaceably mounted is arranged on the device main body side. The cartridge holder 1051 is provided with a liquid feed pump unit 1052, and liquids of each color are supplied from the main tank 1050 to each sub tank 1035 via a liquid supply pump unit 1052 via a supply tube (also referred to as a liquid supply path) 1056 of each color. Will be done.

On the other hand, in order to convey the sheet material P, a transport belt 1012 is provided, which is a transport means for sucking the sheet material P and transporting the sheet material P at a position facing the head 100. The transport belt 1012 is an endless belt, and is hung between the transport roller 1013 and the tension roller 1014. The transport belt 1012 adsorbs the sheet material P by electrostatic adsorption or air suction.

Then, the transport belt 1012 orbits in the sub-scanning direction by rotationally driving the transport roller 1013 via the timing belt 1017 and the timing pulley 1018 by the sub-scanning motor 1016.

Further, on one side of the carriage 1003 in the main scanning direction, a head maintenance device 1020, which is a maintenance / recovery mechanism for maintaining / recovering the head 100, is arranged on the side of the transport belt 1012.

The head maintenance device 1020 includes, for example, a suction cap 1021 and three moisturizing caps 1022 that also serve as one moisturizing cap that caps the nozzle surface (the surface on which the nozzle 104 is formed) of the head 100, and a wiper 1023 that wipes the nozzle surface. It is composed of and.

Further, an encoder scale 1123 forming a predetermined pattern is stretched between both side plates along the main scanning direction of the carriage 1003, and an encoder sensor 1124 composed of a transmissive photosensor that reads the pattern of the encoder scale 1123 is attached to the carriage 1003. It is provided. The linear encoder (main scanning encoder) 1122 that detects the movement of the carriage 1003 is configured by these encoder scales 1123 and the encoder sensor 1124.

A code wheel 1125 is attached to the shaft of the transfer roller 1013, and an encoder sensor 1126 composed of a transmissive photo sensor that detects a pattern formed on the code wheel 1125 is provided. These code wheels 1125 and encoder sensor 1126 constitute a rotary encoder (secondary scanning encoder) that detects the movement amount and movement position of the transfer belt 1012.

In the printing apparatus 1 configured in this way, the sheet material P is fed onto the transport belt 1012, sucked, and transported in the sub-scanning direction by the orbital movement of the transport belt 1012.

Therefore, by driving the head 100 in response to the image signal while moving the carriage 1003 in the main scanning direction, the liquid is discharged to the stopped sheet material P and one line is recorded. Then, after transporting a predetermined amount of the sheet material P, the next row is recorded.

When the recording end signal or the signal that the rear end of the sheet material P reaches the recording area is received, the recording operation is ended and the sheet material P is discharged to the paper ejection tray.

The device for discharging the serial type liquid according to the present embodiment also relates to the configuration related to the circulation of the temperature control liquid described in the above embodiment, the rotation control of the radiator fan, and the control of the heating waveform applied to the head drive substrate. The configuration etc. can be applied.

In the present application, the liquid to be discharged may have a viscosity and surface tension that can be discharged from the head, and is not particularly limited, but the viscosity becomes 30 mPa · s or less at room temperature, under normal pressure, or by heating or cooling. It is preferable that it is a thing. More specifically, solvents such as water and organic solvents, colorants such as dyes and pigments, polymerizable compounds, resins, functionalizing materials such as surfactants, biocompatible materials such as DNA, amino acids and proteins, and calcium. , Solvents, suspensions, emulsions, etc. containing edible materials such as natural pigments, etc., for example, inks for inkjets, surface treatment liquids, constituents of electronic elements and light emitting elements, and formation of electronic circuit resist patterns. It can be used for applications such as liquids for three-dimensional modeling.

The "head" is composed of a piezoelectric actuator (laminated piezoelectric element and thin film piezoelectric element), a thermal actuator using an electric heat conversion element such as a heat generating resistor, a vibrating plate and a counter electrode as an energy generation source for discharging a liquid. Those that use electrostatic actuators are included.

Further, the "device for discharging a liquid" includes not only a device capable of discharging a liquid to a device to which a liquid can adhere, but also a device for discharging the liquid toward the air or the liquid. ..

The "device for discharging the liquid" can also include means for feeding, transporting, and discharging paper to which the liquid can adhere, as well as a pretreatment device, a posttreatment device, and the like.

For example, as a "device that ejects a liquid", an image forming apparatus that ejects ink to form an image on paper, and a powder is formed in layers in order to form a three-dimensional model (three-dimensional model). There is a three-dimensional modeling device (three-dimensional modeling device) that discharges the modeling liquid into the powder layer.

Further, the "device for discharging a liquid" is not limited to a device in which a significant image such as characters and figures is visualized by the discharged liquid. For example, those that form patterns that have no meaning in themselves and those that form a three-dimensional image are also included.

The above-mentioned "material to which a liquid can adhere" means a material to which a liquid can adhere at least temporarily, such as one that adheres and adheres, and one that adheres and permeates. Specific examples include media such as paper, recording paper, recording paper, film, cloth, and other recording media, electronic substrates, electronic components such as piezoelectric elements, powder layers (powder layers), organ models, and inspection cells. Yes, including anything to which the liquid adheres, unless otherwise specified.

The material of the above-mentioned "material to which liquid can be attached" may be paper, thread, fiber, cloth, leather, metal, plastic, glass, wood, ceramics or the like as long as the liquid can be attached even temporarily.

Further, the "device for discharging the liquid" includes, but is not limited to, a device in which the liquid discharge head and the device to which the liquid can adhere move relatively. Specific examples include a serial type device that moves the liquid discharge head, a line type device that does not move the liquid discharge head, and the like.

In addition, as a "device for ejecting liquid", a treatment liquid coating device for ejecting a treatment liquid to the paper in order to apply the treatment liquid to the surface of the paper for the purpose of modifying the surface of the paper, etc. There is an injection granulator that injects a composition liquid in which a raw material is dispersed in a solution through a nozzle to granulate fine particles of the raw material.

In addition, image formation, recording, printing, printing, printing, modeling, etc. in the terms of the present application are all synonymous.

1 Printing device 10 Carry-in part 20 Pretreatment part 30 Printing part 31 Drum 40 Drying part 50 Carry-out part 60 Inversion mechanism part 33 Discharge unit 100 Liquid discharge head (head)
160 Head drive board 402 Ink supply manifold (liquid supply manifold)
500 Circulation path 501 Temperature control liquid tank 503 Heat exchanger 505 Temperature control liquid supply manifold 506 Temperature control liquid recovery manifold 510 Temperature control liquid 511 Radiator 600 Manifold 801 Temperature control liquid temperature control means

Claims (11)

A head that discharges liquid and
A circulation path through which the temperature-adjusted temperature control liquid circulates,
A cooling means for cooling the temperature control liquid is provided.
The cooling means is a radiator,
A means for controlling the rotation of the fan of the radiator is provided based on the target temperature of the temperature control liquid, the ambient temperature of the radiator, and the detection results of the temperature of the temperature control liquid at the inlet of the radiator. A device that discharges a liquid. A head that discharges liquid and
A circulation path through which the temperature-adjusted temperature control liquid circulates,
A cooling means for cooling the temperature control liquid is provided.
The cooling means is a radiator,
Equipped with a power amplification unit that amplifies the waveform that drives the head based on the detection results of the target temperature of the temperature control liquid, the ambient temperature of the radiator, and the temperature of the temperature control liquid at the inlet of the radiator. A device for discharging a liquid, which comprises means for controlling a heating waveform applied to the head drive substrate. A head that discharges liquid and
A circulation path through which the temperature-adjusted temperature control liquid circulates,
A cooling means for cooling the temperature control liquid is provided.
The cooling means is a radiator,
Based on the target temperature of the temperature control liquid, the atmospheric temperature of the radiator, and the detection results of the temperature of the temperature control liquid at the inlet of the radiator.
A device for discharging a liquid, which comprises means for controlling the rotation of the fan of the radiator and the heating waveform applied to the head drive substrate equipped with the power amplification unit that amplifies the waveform that drives the head. .. With a plurality of the heads that discharge different liquids,
A temperature control liquid tank common to the plurality of heads for storing the temperature control liquid is provided, and the temperature control liquid is flowed from the temperature control liquid tank to each of the plurality of heads via the radiator. The device for discharging the liquid according to any one of claims 1 to 3. A liquid supply path for supplying the liquid to the plurality of heads is provided.
The device for discharging a liquid according to any one of claims 1 to 4, wherein the liquid supply path and the circulation path are thermally coupled. The device for discharging a liquid according to any one of claims 1 to 5, wherein the circulation path and the head drive substrate on which the power amplification unit for amplifying the waveform for driving the head is mounted are thermally coupled. .. A liquid supply manifold that distributes and supplies the liquid to the plurality of heads,
A temperature control liquid supply manifold that distributes and supplies the temperature control liquid to the plurality of heads,
A temperature control liquid recovery manifold that recovers the temperature control liquid from the plurality of heads is provided.
The liquid according to any one of claims 1 to 6, wherein the liquid supply manifold, the temperature control liquid supply manifold, and the temperature control liquid recovery manifold are located above the plurality of heads. Equipment to do. A temperature control liquid supply manifold that distributes and supplies the temperature control liquid to the plurality of heads,
A temperature control liquid recovery manifold that recovers the temperature control liquid from the plurality of heads is provided.
A first to the fourth aspect, wherein the temperature control liquid flows in the order of the temperature control liquid supply manifold, a predetermined head of the plurality of heads, a head different from the predetermined head, and the temperature control liquid recovery manifold. A device for discharging the liquid according to any one of 6. Equipped with a plurality of the heads for discharging different liquids,
The cooling means includes a plurality of radiators and includes a plurality of radiators.
The plurality of radiators are connected in parallel and arranged in the circulation path.
The device for discharging a liquid according to claim 1, wherein the controlling means controls the rotation of the fans of the plurality of radiators at a target temperature according to the viscosity of the liquid. Multiple head units, including multiple heads that eject liquid,
A circulation path through which the temperature-adjusted temperature control liquid circulates,
A cooling means for cooling the temperature control liquid and
A temperature control liquid tank common to the plurality of head units for storing the temperature control liquid is provided.
The cooling means is a radiator,
Q, the total calorific value of the cooling target that is thermally coupled to the circulation path
The limit coefficient that defines the upper limit of the amount to be applied to the member to which the liquid is applied is α,
The inflow temperature of the temperature control liquid into the radiator is T1,
The airflow temperature of the radiator is T5,
When the thermal resistance value of the radiator is Rr,
Q × α = (T1-T5) / Rr,
A device that discharges a liquid, characterized in that the relationship of The cooling means includes a plurality of radiators and includes a plurality of radiators.
The device for discharging a liquid according to claim 10, wherein the plurality of radiators are connected in parallel, connected in series, or connected in parallel and in series.

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