Printing device with switchable washing modules

Abstract

The present disclosure provides a printing device with switchable cleaning modules, comprising: a plurality of cleaning modules (32) configured to be able to clean a substrate (36) positioned therein; the driving module (34) is connected to the cleaning modules (32), and the driving module (34) is configured to be capable of switching any one of the cleaning modules (32) to a printing station; and a printing module configured to be able to place a printing material on the substrate (36) at the printing station.

Description

Technical Field

[0001] The present disclosure relates to the field of printing, and more specifically to a printing device with a switchable cleaning module. Background Art

[0002] When performing experiments such as DNA synthesis and etching, the surface state of the substrate often has a great influence on the experimental results. For example, a substrate surface with good hydrophobicity can make the droplets of DNA synthesis reagents form a perfect circle, while a substrate surface with poor hydrophobicity will make the shape of the droplets irregular. The surface state of the substrate is related to the cleanliness of the substrate surface. Therefore, in order to avoid the experimental results being affected by the surface state of the substrate, it is necessary to clean the substrate before the experiment.

[0003] For example, Chinese invention patent application CN113103578A discloses a DNA synthesizer and synthesis method. The nozzle printing device is used for DNA synthesis, and the shower and air drying device is used for showering and air drying the product. The bottom plate printing device is arranged under the nozzle printing device and the shower and air drying device, and includes a motion mechanism and a bearing mechanism connected to the motion mechanism. The motion mechanism can drive the bearing mechanism to move between the nozzle printing device and the shower and air drying device. Utility Model Content

[0004] The present disclosure is made in view of the above-mentioned state of the prior art. The purpose of the present disclosure is to provide a printing device with a switchable cleaning module.

[0005] In order to achieve the above objectives, the present disclosure may adopt the following technical solutions.

[0006] The embodiment of the present application provides a printing device with a switchable cleaning module, comprising:

[0007] a plurality of cleaning modules configured to clean substrates positioned therein;

[0008] a driving module, the driving module being connected to the cleaning module and being configured to switch any one of the plurality of cleaning modules to a printing station; and

[0009] A printing module is configured to place a printing material on the substrate at the printing station.

[0010] In at least one embodiment, a plurality of the cleaning modules are arranged side by side, and the driving module is configured to be able to drive the plurality of the cleaning modules to move along their arrangement direction so as to switch different cleaning modules to the printing station.

[0011] In at least one embodiment, at the printing station, the driving module is configured to drive the cleaning module to move along the extension direction of the substrate, so that the printing module can place the printing material at different positions on the substrate.

[0012] In at least one embodiment, the printing module includes a printing head for ejecting printing material onto the substrate, and the printing head is configured to be able to approach and move away from the substrate along a thickness direction of the substrate.

[0013] In at least one embodiment, the cleaning module includes one or more supports, and the support includes a first positioning portion, a second positioning portion, a first elastic element, and a second elastic element.

[0014] The first elastic element is configured to bias the substrate toward the first positioning portion so that the substrate is positioned in a first direction.

[0015] The second elastic element is configured to bias the substrate toward the second positioning portion so that the substrate is positioned in a second direction.

[0016] The first direction, the second direction, and a thickness direction of the substrate are orthogonal to each other.

[0017] In at least one embodiment, the cleaning module includes one or more blowing holes for spraying gas onto the substrate, the axial direction of the blowing hole is inclined relative to the thickness direction of the substrate, the blowing hole is configured to be able to move along a first direction relative to the substrate, the first direction is orthogonal to the thickness direction of the substrate, and the axial direction of the blowing hole is inclined relative to the first direction.

[0018] In at least one embodiment, in each of the cleaning modules, a plurality of the substrates can be arranged side by side in the first direction, a plurality of the blowing holes are arranged side by side in the second direction, and the first direction, the second direction and the thickness direction of the substrate are orthogonal to each other.

[0019] In at least one embodiment, the cleaning module includes one or more cleaning nozzle groups, wherein the cleaning nozzle group includes a plurality of cleaning nozzles for spraying a cleaning liquid onto the substrate and is configured to be movable relative to the substrate.

[0020] In one of the cleaning nozzle groups, the central axis of the cleaning nozzle is inclined relative to the thickness direction of the substrate, and the central axes of the plurality of cleaning nozzles intersect at one point.

[0021] In at least one embodiment, in each of the cleaning modules, a plurality of the substrates can be arranged side by side in a first direction, the cleaning nozzle group is configured to be able to move relative to the substrate along the first direction, and a plurality of the cleaning nozzle groups are arranged side by side in a second direction, and the first direction, the second direction and the thickness direction of the substrate are orthogonal to each other.

[0022] In at least one embodiment, the cleaning module includes a base and a sealing cover, wherein the base is configured to support the substrate, and the sealing cover is configured to rotate relative to the base to switch between a closed position and an open position.

[0023] In the closed position, the sealing cover and the base together define a closed working space, the substrate can be positioned in the working space, and the printing module is located outside the working space.

[0024] In the open position, the sealing cover and the base no longer define the working space, and the substrate is exposed to the printing module, so that a printing operation can be performed.

[0025] By adopting the above technical solution, by setting a plurality of cleaning modules and a driving module, the plurality of cleaning modules can be alternately placed in the printing station. When one cleaning module is in the printing station, the remaining cleaning modules can clean the substrate, so that the printing work and the cleaning work of the substrate can be carried out at the same time. In this way, the printing device can have a higher working efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 1 is a top view of a printing device with a switchable cleaning module according to an embodiment of the present disclosure, wherein the sealing cover of one cleaning module is in an open position, and the sealing cover of another cleaning module is in a closed position. In addition, some restraining elements are omitted.

[0027] Figure 2 yes Figure 1 Schematic diagram of a partial structure of a printing device in FIG.

[0028] Figure 3 yes Figure 1 Schematic diagram of a top view of a cleaning module in which the sealing cover is in a closed position.

[0029] Figure 4 yes Figure 3 Right side view of the cleaning module.

[0030] Figure 5 yes Figure 3 Front view of the cleaning module in the.

[0031] Figure 6 yes Figure 1Schematic diagram of the partial structure of the cleaning module.

[0032] Figure 7 yes Figure 1 Schematic diagram of the constraint elements of the cleaning module.

[0033] Figure 8 yes Figure 1 A cross-sectional view of the base of the cleaning module in FIG.

[0034] Description of Reference Numerals

[0035] 30 Printing device

[0036] 32 Cleaning module

[0037] 34 Driver Module

[0038] 36 Substrate

[0039] 38 supports

[0040] 40 first positioning part

[0041] 42 second positioning portion

[0042] 44 first elastic element

[0043] 46 second elastic element

[0044] 48 Blowing hole

[0045] 50 Base

[0046] 52 Sealing cover

[0047] 54 Workspace

[0048] 56 First spring plunger

[0049] 58 First pressure head

[0050] 60 Second spring plunger

[0051] 62 Second pressure head

[0052] 64 First support

[0053] 66 Second support

[0054] 68 First positioning groove

[0055] 70 Part 1

[0056] 72 Second positioning slot

[0057] 74 Part 2

[0058] 76 Gas circuit components

[0059] 78 Pneumatic connector

[0060] 80 Constraint Components

[0061] 82 Constraint Hole

[0062] 84 First Drive

[0063] 86 Connecting elements

[0064] 88 Collection Tank

[0065] 90 drain hole

[0066] 92 Drainage interface

[0067] 94 Negative pressure interface

[0068] 96 Hinge

[0069] T thickness direction

[0070] F First Direction

[0071] S Second direction

[0072] A-axis

[0073] L Cleaning nozzle center axis

[0074] H The center axis of the constraint element DETAILED DESCRIPTION

[0075] like Figure 1 As shown, an embodiment of the present disclosure provides a printing device 30 having a switchable cleaning module.

[0076] like Figure 1 As shown, the printing device 30 may include a plurality of cleaning modules 32, a driving module 34, and a printing module (not shown). The cleaning module 32 is configured to clean a substrate 36 positioned therein. The driving module 34 is connected to the cleaning module 32 and is configured to switch any one of the plurality of cleaning modules 32 to a printing station. The printing module is configured to place a printing material on the substrate 36 at the printing station.

[0077] In the above technical solution provided by the embodiment of the present disclosure, by providing multiple cleaning modules 32 and driving modules 34, multiple cleaning modules 32 can be alternately in the printing station. When one cleaning module 32 is in the printing station, the remaining cleaning modules 32 can clean the substrate, so that the printing work and the cleaning work of the substrate can be carried out at the same time. In this way, the printing device 30 can have a higher working efficiency.

[0078] In some examples, such as Figures 1 to 3 as well as Figure 5 As shown, the substrate 36 is in a sheet shape. For example, when the substrate 36 is positioned on the cleaning module 32, the thickness direction T of the substrate 36 may be substantially parallel to the vertical direction.

[0079] In some examples, the printing material is a liquid. For example, the printing material can be a solution including a base or an activator. In other words, the printing device 30 can be used to synthesize DNA.

[0080] In some examples, such as Figure 1 As shown, a plurality of cleaning modules 32 are arranged side by side. The driving module 34 is configured to be able to drive the plurality of cleaning modules 32 along their arrangement direction ( Figure 1 The printing device 30 can be moved in the left and right directions to switch different cleaning modules 32 to the printing stations. In this way, the structure of the printing device 30 is relatively simple.

[0081] In some examples, such as Figure 1 As shown, at the printing station, the driving module 34 is configured to drive the cleaning module 32 to move along the extension direction of the substrate 36, so that the printing module can place the printing material at different positions on the substrate 36. Here, the extension direction of the substrate 36 refers to a direction orthogonal to the thickness direction T. In this way, the driving module 34 can not only switch the cleaning module 32 to the printing station, but also help complete the printing work, so that the printing device 30 can have a smaller number of parts, which is conducive to the miniaturization and lightweight of the printing device 30.

[0082] In some examples, such as Figure 1 and Figure 2 As shown, the extension direction of the substrate 36 includes a first direction F and a second direction S, and the first direction F, the second direction S and the thickness direction T are orthogonal to each other. For example, the first direction F and the second direction S may be horizontal directions.

[0083] In some examples, such as Figure 1 and Figure 2 As shown, a plurality of cleaning modules 32 are arranged side by side in the second direction S.

[0084] In some examples, such as Figure 2 As shown, the printing module includes a printing head (not shown) for ejecting printing material to the substrate 36. The printing head is configured to be able to approach and move away from the substrate 36 along the thickness direction T of the substrate 36. In this way, the printing head can approach the substrate 36 during printing, and move away from the substrate 36 when switching the cleaning module 32, thereby avoiding interference between the printing head and the cleaning module 32.

[0085] In some examples, the print head is an electrohydrodynamic head (EHD head), an inkjet printing technology head (Inkjet head), etc.

[0086] In some examples, such as Figures 1 to 5 As shown, the cleaning module 32 includes one or more abutments 38, and the abutments 38 include a first positioning portion 40, a second positioning portion 42, a first elastic element 44, and a second elastic element 46. The first elastic element 44 is configured to bias the substrate 36 to the first positioning portion 40, so that the substrate 36 is positioned in the first direction F. The second elastic element 46 is configured to bias the substrate 36 to the second positioning portion 42, so that the substrate 36 is positioned in the second direction S. In this way, the substrate 36 can be quickly and accurately positioned on the abutment 38, so that the printing device 30 is easy to use.

[0087] In some examples, such as Figures 1 to 4 As shown, a plurality of supports 38 of one cleaning module 32 are arranged side by side in the first direction F, and a plurality of substrates 36 within one cleaning module 32 are arranged side by side in the first direction F.

[0088] In some examples, such as Figure 3 and Figure 4 As shown, the first elastic element 44 includes a first spring plunger 56 and a first pressing head 58 . The axial direction of the first spring plunger 56 is parallel to the first direction F, and is configured to bias the substrate 36 via the first pressing head 58 .

[0089] In some examples, such as Figure 3 and Figure 4 As shown, the second elastic element 46 includes a second spring plunger 60 and a second pressing head 62 . The axial direction of the second spring plunger 60 is parallel to the second direction S, and is configured to bias the substrate 36 via the second pressing head 62 .

[0090] In some examples, such as Figures 3 to 5 As shown, the support 38 includes one or more first supports 64 and one or more second supports 66. The first support 64 is provided with a first positioning groove 68, and the first positioning groove 68 is configured to receive a first portion 70 of the substrate 36. The first elastic element 44 is connected to the first support 64 and is configured to press against the first portion 70. The second support 66 is provided with a second positioning groove 72, and the second positioning groove 72 is configured to receive a second portion 74 of the substrate 36. The side wall of the second positioning groove 72 is formed as the first positioning portion 40 and / or the second positioning portion 42.

[0091] In some examples, such as Figures 3 to 5 As shown, the first spring plunger 56 and the second spring plunger 60 are threadedly engaged with the first support 64 .

[0092] In some examples, such as Figure 3 As shown, the first pressing head 58 and the second pressing head 62 are configured to be able to at least partially extend into the first positioning groove 68 .

[0093] In some examples, such as Figure 3 As shown, the substrate 36 is generally rectangular, with a first portion 70 and a second portion 74 disposed diagonally.

[0094] In some examples, such as Figures 3 to 5 As shown, the bottoms of the first positioning groove 68 and the second positioning groove 72 are provided with adsorption holes, which are configured to be able to adsorb the substrate 36 through negative pressure. In this way, the substrate 36 can be stably held on the support 38.

[0095] In some examples, such as Figures 4 to 6 As shown, the cleaning module 32 includes one or more blowing holes 48 for spraying gas onto the substrate 36. The axial direction A of the blowing hole 48 is inclined relative to the thickness direction T of the substrate 36. The blowing hole 48 is configured to be able to move along a first direction F relative to the substrate 36, the first direction F is orthogonal to the thickness direction T of the substrate 36, the axial direction A of the blowing hole 48 is inclined relative to the first direction F, and the axial direction A of the blowing hole 48 is orthogonal to the second direction S. Here, inclined means neither parallel nor orthogonal. In this way, the cleaning module 32 can blow dry gas to the substrate 36, thereby blowing the cleaning liquid remaining on the substrate 36 away from the substrate 36 or drying the cleaning liquid, so that the substrate 36 is air-dried. In addition, compared with, for example, a wind knife, the through pipe allows the airflow to be blown out from the hole-shaped blowing hole 48, and the airflow can have a faster flow rate, so that the printing device 30 can have a higher drying efficiency. Furthermore, by making the axial direction A of the blowing hole 48 inclined relative to the thickness direction T of the substrate 36, and the blowing hole 48 able to move along the first direction F, the airflow can drive the cleaning liquid remaining on the substrate 36 along the first direction F, so that the printing device 30 can have a better air-drying effect.

[0096] In some examples, such as Figure 4 As shown, the angle between the axial direction A of the blowing hole 48 and the thickness direction T of the substrate 36 is 30° to 60°, for example, 45°.

[0097] In some examples, such as Figures 4 to 6 As shown, the cleaning module 32 further includes an air circuit component 76 and a pneumatic connector 78. The blowing hole 48 is provided on the air circuit component 76. The pneumatic connector 78 is connected to the air circuit component 76 and communicates with the blowing hole 48.

[0098] In some examples, such as Figures 4 to 6As shown, in each cleaning module 32, a plurality of blowing holes 48 are arranged side by side in the second direction S. In this way, by arranging a plurality of blowing holes 48 side by side, the drying gas can fully cover the substrate 36, thereby further improving the air drying effect of the printing device 30. In addition, by making the arrangement direction of the plurality of substrates 36 in one cleaning module 32 consistent with the movement direction of the blowing holes 48, the blowing holes 48 can air dry all the substrates 36 during the movement process, thereby further improving the air drying efficiency of the printing device 30.

[0099] In some examples, such as Figures 3 to 7 As shown, the cleaning module 32 includes one or more cleaning nozzle groups (defined by a constraint element 80, which will be described later). The cleaning nozzle group includes a plurality of cleaning nozzles (not shown in the figure) for spraying cleaning liquid onto the substrate 36, and is configured to be able to move relative to the substrate 36. In a cleaning nozzle group, the central axis L of the cleaning nozzle is inclined relative to the thickness direction T of the substrate 36, and the central axes of the plurality of cleaning nozzles intersect at one point. In this way, by making the central axis L of the cleaning nozzle inclined and intersecting, the cleaning liquid can cover the cleaning area more densely, so that the printing device 30 can have a better cleaning effect.

[0100] In some examples, such as Figure 7 As shown, the cleaning nozzle group is located on one side of the substrate 36, and the intersection point of the central axes L of the plurality of cleaning nozzles is located on the other side of the substrate 36. In other words, under this configuration, for the cleaning nozzles of one cleaning nozzle group, the cleaning liquids sprayed from different cleaning nozzles may not contact each other before reaching the substrate 36.

[0101] In some examples, the cleaning nozzle is a hose.

[0102] In some examples, such as Figure 7 As shown, the angle θ between the central axis L of the cleaning nozzle and the thickness direction T of the substrate 36 is 20° to 35°, for example, it can be 20°, 25°, 30° or 35°.

[0103] In some examples, such as Figures 4 to 7 As shown, the cleaning module 32 further includes a constraint element 80. The constraint element 80 is provided with a plurality of constraint holes 82, each of which receives a cleaning nozzle, so that the constraint element 80 receiving a plurality of cleaning nozzles forms a cleaning nozzle group. The central axis of the constraint hole 82 is inclined relative to the thickness direction T of the substrate 36, and the central axes of the plurality of constraint holes 82 intersect at one point. In this way, the constraint element 80 can constrain the angle between the central axis L of the cleaning nozzle and the thickness direction T of the substrate 36.

[0104] In some examples, such as Figure 7As shown, the minimum distance between the constraining element 80 and the substrate 36 is 3 mm to 6 mm, for example, 4 mm.

[0105] In some examples, such as Figure 7 As shown, the height of the restraining element 80 in the thickness direction T is 12 mm to 16 mm, for example, 14 mm.

[0106] In some examples, such as Figure 7 As shown, the distance between the intersection of the central axis L of the cleaning nozzle on the upper surface of the substrate 36 and the intersection of the central axis H of the constraining element 80 on the upper surface of the substrate 36 is 8 mm to 12 mm, for example, 8 mm.

[0107] In some examples, such as Figures 3 to 7 As shown, the cleaning nozzle group is configured to be able to move relative to the substrate 36 along the first direction F, and multiple cleaning nozzle groups are arranged side by side in the second direction S. In this way, by arranging multiple cleaning nozzle groups side by side, the cleaning liquid can fully cover the substrate 36, thereby further improving the cleaning effect of the printing device 30. In addition, by making the arrangement direction of multiple substrates 36 in a cleaning module 32 consistent with the movement direction of the cleaning nozzle group, the cleaning nozzle group can clean all substrates 36 during the movement process, so that the printing device 30 can have a higher cleaning efficiency.

[0108] In some examples, such as Figures 1 to 6 As shown, the cleaning module 32 further includes a first driver 84. The first driver 84 is connected to the gas path element 76 and the restriction element 80, and is configured to drive the gas path element 76 and the restriction element 80 to move along the first direction F.

[0109] In some examples, such as Figures 1 to 6 As mentioned above, the first driver 84 includes a motor.

[0110] In some examples, such as Figures 1 to 6 As shown, the cleaning module 32 further includes a connecting element 86. The first driver 84 is connected to the gas path element 76 and the restriction element 80 via the connecting element 86, and the gas path element 76, the restriction element 80 and the connecting element 86 are fixedly connected to each other.

[0111] In some examples, such as Figures 1 to 5 as well as Figure 8As shown, the cleaning module 32 includes a base 50 and a sealing cover 52. The base 50 is configured to support the substrate 36. The sealing cover 52 is configured to be able to rotate relative to the base 50 to switch between a closed position and an open position. In the closed position, the sealing cover 52 and the base 50 together define a closed working space 54, the substrate 36 can be positioned in the working space 54, and the printing module is located outside the working space 54. In the open position, the sealing cover 52 and the base 50 no longer define the working space 54, and the substrate 36 is exposed to the printing module, so that a printing operation can be performed. In this way, when the sealing cover 52 is in the closed position, the cleaning module can have a relatively closed internal environment, so that the cleaning liquid can be prevented from splashing during the cleaning and air-drying process.

[0112] In some examples, such as Figures 1 to 5 As shown, the support platform 38 is fixedly connected to the base 50 , and at least a portion of the first driver 84 is fixedly connected to the sealing cover 52 .

[0113] In some examples, such as Figure 3 and Figure 8 As shown, the base 50 is provided with a collecting tank 88, and a drain hole 90 is provided at the bottom of the collecting tank 88. The collecting tank 88 is configured to collect the cleaning liquid to the drain hole 90. In this way, the cleaning liquid can be discharged from the working space 54 through the drain hole 90.

[0114] In some examples, such as Figure 4 and Figure 8 As shown, the base 50 is provided with a drain interface 92. The drain interface 92 is communicated with the drain hole 90 and is located outside the working space 54. In this way, when the sealing cover 52 is in the closed position, the external container connected to the drain interface 92 can collect the cleaning liquid.

[0115] In some examples, such as Figure 4 As shown, the base 50 is provided with a negative pressure interface 94. The negative pressure interface 94 is connected to the adsorption hole on the first support 64 and / or the second support 66, and is located outside the working space 54. In this way, when the sealing cover 52 is in the closed position, the external negative pressure source can be connected to the adsorption hole via the negative pressure interface 94.

[0116] In some examples, such as Figure 2 , Figure 3 as well as Figure 5 As shown, the cleaning module 32 further includes one or more hinges 96, and the sealing cover 52 is rotatably connected to the base 50 via the hinges 96. For example, the hinges 96 can be damping hinges.

[0117] In some examples, such as Figures 1 to 5As shown, the cleaning module 32 further includes a second driver (not shown in the figure). The second driver is configured to drive the sealing cover 52 to rotate relative to the base 50.

[0118] The terms used in the embodiments of the present disclosure are only used to explain the embodiments of the present disclosure, and are not intended to limit the present disclosure. Unless otherwise defined, the technical terms or scientific terms used in the embodiments of the present disclosure should be the common meanings understood by people with ordinary skills in the field to which the present disclosure belongs. The "first", "second" and similar words used in the present disclosure specification and claims do not indicate any order, quantity or importance, but are only used to distinguish different components. Similarly, similar words such as "one" or "one" do not indicate a quantity limit, but indicate that there is at least one. Similar words such as "include" or "include" mean that the elements or objects appearing in front of "include" or "include" include the elements or objects listed after "include" or "include" and their equivalents, and do not exclude other elements or objects. "Up", "down", "left", "right" and the like are only used to indicate relative positional relationships. When the absolute position of the described object changes, the relative positional relationship may also change accordingly. "Multiple" refers to two or more, unless otherwise clearly defined.

[0119] The above description is only an optional embodiment of the present disclosure and is not intended to limit the present disclosure. Any modifications, equivalent substitutions, improvements, etc. made within the principles of the present disclosure shall be included in the protection scope of the present disclosure.

Claims

1. A printing device with a switchable cleaning module, characterized in that: include: a plurality of cleaning modules configured to clean substrates positioned therein; A driving module, the driving module is connected to the cleaning module and is configured to switch any one of the plurality of cleaning modules to a printing station; as well as A printing module is configured to place a printing material on the substrate at the printing station.

2. The printing device according to claim 1, characterized in that: The plurality of cleaning modules are arranged side by side, and the driving module is configured to be able to drive the plurality of cleaning modules to move along their arrangement direction so as to switch different cleaning modules to the printing station.

3. The printing device according to claim 1, characterized in that: At the printing station, the driving module is configured to drive the cleaning module to move along the extension direction of the substrate, so that the printing module can place the printing material at different positions on the substrate.

4. The printing device according to claim 1, characterized in that: The printing module includes a printing head for ejecting printing material onto the substrate, and the printing head is configured to be able to approach and move away from the substrate along a thickness direction of the substrate.

5. The printing device according to any one of claims 1 to 4, characterized in that: The cleaning module includes one or more supports, and the support includes a first positioning portion, a second positioning portion, a first elastic element, and a second elastic element. The first elastic element is configured to bias the substrate toward the first positioning portion so that the substrate is positioned in a first direction. The second elastic element is configured to bias the substrate toward the second positioning portion so that the substrate is positioned in a second direction. The first direction, the second direction, and a thickness direction of the substrate are orthogonal to each other.

6. The printing device according to any one of claims 1 to 4, characterized in that: The cleaning module includes one or more blowing holes for spraying gas onto the substrate, wherein the axial direction of the blowing hole is inclined relative to the thickness direction of the substrate, and the blowing hole is configured to be able to move along a first direction relative to the substrate, wherein the first direction is orthogonal to the thickness direction of the substrate, and the axial direction of the blowing hole is inclined relative to the first direction.

7. The printing device according to claim 6, characterized in that: In each of the cleaning modules, a plurality of the substrates can be arranged side by side in the first direction, a plurality of the blowing holes can be arranged side by side in the second direction, and the first direction, the second direction and the thickness direction of the substrate are orthogonal to each other.

8. The printing device according to any one of claims 1 to 4, characterized in that: The cleaning module includes one or more cleaning nozzle groups, wherein the cleaning nozzle group includes a plurality of cleaning nozzles for spraying cleaning liquid onto the substrate and is configured to be able to move relative to the substrate. In one of the cleaning nozzle groups, the central axis of the cleaning nozzle is inclined relative to the thickness direction of the substrate, and the central axes of the plurality of cleaning nozzles intersect at one point.

9. The printing device according to claim 8, characterized in that: In each of the cleaning modules, a plurality of the substrates can be arranged side by side in a first direction, the cleaning nozzle group is configured to be able to move relative to the substrate along the first direction, and a plurality of the cleaning nozzle groups are arranged side by side in a second direction, and the first direction, the second direction and the thickness direction of the substrate are orthogonal to each other.

10. The printing device according to any one of claims 1 to 4, characterized in that: The cleaning module comprises a base and a sealing cover, wherein the base is configured to support the substrate, and the sealing cover is configured to rotate relative to the base to switch between a closed position and an open position. In the closed position, the sealing cover and the base together define a closed working space, the substrate can be positioned in the working space, and the printing module is located outside the working space. In the open position, the sealing cover and the base no longer define the working space, and the substrate is exposed to the printing module, so that a printing operation can be performed.

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