Fluid online mixing system, proportioning mixing system and printing equipment thereof

Abstract

The utility model provides a fluid on-line proportioning and mixing system and printing equipment thereof, which can realize a more uniform mixing effect and improve the consistency of fluid characteristics while improving the production efficiency. The flow guide device comprises an input interface, an output interface and a flow guide device which is provided with a static mixing flow guide structure and is configured to enable fluid to be shunted and converged when the fluid passes through the static mixing flow guide structure; the first mixing device is provided with a first accommodating space for accommodating fluid and a fluid disturbance mechanism; the system comprises the flow guiding device and the first mixing device, and the flow guiding device and the first mixing device can be connected between the input connector and the output connector in series in any permutation and combination sequence, so that continuous online mixing of fluid from the input connector to the output connector is achieved.

Description

Technical Field

[0001] This utility model relates to the field of printing, and in particular to an online fluid mixing system, a proportioning mixing system and a printing device thereof. Background Technology

[0002] Most existing printing technologies use different fluids to print separately as dots through different fluid channels; this method is called color separation printing. Different colored fluids are positioned at different dot locations and form droplets of different sizes, and the different colors are superimposed to simulate different colors and their shades.

[0003] However, this requires very precise control over the position and size of the dots in the fluid positioning, making it difficult to achieve uniform printing results. To enhance printing uniformity or to achieve colors that are impossible with separate color printing, pre-mixing of the fluid can be used. However, this leads to inefficient production and variations between different batches. Summary of the Invention

[0004] This invention addresses the problems existing in the prior art by providing an online fluid mixing system, a proportioning mixing system, and a printing device thereof, which can achieve a more uniform mixing effect, improve production efficiency, and enhance the consistency of fluid properties.

[0005] In a first aspect, this utility model relates to an online fluid mixing system for use in printing equipment, the system comprising: an input interface and an output interface.

[0006] A flow guiding device having a static mixing flow guiding structure, configured to enable the flow to split and merge when the fluid passes through the static mixing flow guiding structure;

[0007] The first mixing device has a first containment space for containing fluid and a fluid agitation mechanism;

[0008] The system includes a flow guiding device and a first mixing device that can be connected in series between the input interface and the output interface in any arrangement or combination order to achieve continuous online mixing of fluid from the input interface to the output interface.

[0009] As one embodiment, a second mixing device is also included, having a second containment space for containing fluid and an ultrasonic vibration source; wherein the flow guiding device, the first mixing device and the second mixing device can be connected in series between the input interface and the output interface in any number and in any arrangement and combination order to realize continuous online mixing of fluid from the input interface to the output interface.

[0010] In one embodiment, the static mixing guide structure includes a first fluid path and a second fluid path; the second fluid path is configured to divert fluid flowing through the first fluid path, and the first fluid path is configured to merge fluid flowing through the second fluid path.

[0011] In one embodiment, the inner wall of the static mixing guide structure has a smooth arc.

[0012] In one implementation, the static mixing and guiding structure is a spiral structure.

[0013] In one embodiment, the static mixing guide structure includes a flow channel inlet and a flow channel outlet, and the first fluid path includes a main path having a first end and a second end; the first end of the first fluid path is connected to the flow channel inlet, and the second end of the first fluid path is connected to the flow channel outlet.

[0014] The second fluid path includes a plurality of first arc-shaped paths and a plurality of second arc-shaped paths, wherein the first arc-shaped paths form a closed loop with the main path, the second arc-shaped paths form a closed loop with the main path, and the first arc-shaped paths and the second arc-shaped paths are sequentially arranged on both sides of the main path.

[0015] In one implementation, the static mixing guide structure includes a flow channel inlet and a flow channel outlet.

[0016] The number of the first fluid path is multiple segments, and each segment of the first fluid path has a first end and a second end;

[0017] The number of the second fluid paths is one or more groups, and each group of the second fluid paths includes multiple parallel branch paths; one end of each group of the second fluid paths is connected to the second end of one of the first fluid paths, and the other end is connected to the first end of the next first fluid path; the first fluid paths and the second fluid paths are connected end to end in sequence.

[0018] The first end of the first fluid path is connected to the inlet of the flow channel, and the second end of the last fluid path is connected to the outlet of the flow channel.

[0019] In one embodiment, the fluid disturbance mechanism includes: a rotating part including at least one disturbance blade configured to provide shear force to the fluid; and a rotation drive mechanism for driving the rotating part to rotate.

[0020] In one embodiment, the first accommodating space includes a first accommodating space inlet, a first accommodating space outlet, and a plurality of integrated, series-connected chambers; the rotating part is installed in each of the chambers, and the first accommodating space inlet, the through hole, and the first accommodating space outlet form a tortuous flow path.

[0021] In one implementation, the chambers are detachably connected.

[0022] Secondly, this application relates to an online fluid proportioning and mixing system.

[0023] It includes at least two fluid input sources, which are used to provide the fluids to be mixed;

[0024] The metering and control device is configured to accurately measure and control the amount of fluid from each fluid input source;

[0025] A fluid transport device is configured to apply energy to a fluid, forcing the fluid to flow in a predetermined direction;

[0026] The control unit is configured to control the operation of the metering control device and the fluid delivery device;

[0027] And, as described in the first aspect, the online fluid mixing system is configured to mix the fluid from the fluid input source online.

[0028] In one embodiment, the proportioning control unit includes an interface for communicating with a metering control device and a fluid delivery device, as well as a memory storing mixing formula data, which is used to guide the proportioning control unit to achieve fluid proportioning.

[0029] Thirdly, this application relates to an online fluid proportioning and mixing system with automatic cleaning function, including a cleaning fluid supply device;

[0030] The online fluid proportioning and mixing system as described in the second aspect; the online fluid proportioning and mixing system includes at least two fluid input sources, a metering and control device, a fluid delivery device, a control unit, and an online fluid mixing system;

[0031] A flow control device has at least two input terminals and one output terminal; the input terminals are respectively connected to the cleaning fluid supply device and the fluid input source; the output terminal is connected to the fluid delivery device.

[0032] The control unit is also configured to control the flow control device to switch between the cleaning fluid supply device and the fluid input source, thereby selectively delivering the cleaning fluid or the fluid from the fluid input source to the online fluid mixing system.

[0033] Fourthly, this application relates to a printing device, including the fluid online mixing system described in the first aspect, and a printing module; the fluid online mixing system includes an output interface connected to the printing module.

[0034] By adopting the above structure, this utility model has the following advantages compared with the prior art:

[0035] This invention enables fluid to be divided and merged through a static mixing and guiding structure, and the fluid is disturbed through the fluid disturbance mechanism of the first mixing device; thus, the fluid is more uniformly mixed during the transportation process, resulting in a more uniform printing effect, improving production efficiency and the consistency of fluid characteristics. Attached Figure Description

[0036] Figure 1 This is a block diagram of the online fluid mixing system according to Embodiment 1 of this utility model.

[0037] Figure 2 This is a block diagram of the online fluid mixing system according to Embodiment 2 of this utility model.

[0038] Figure 3 This is a schematic diagram of the first embodiment of the static mixing and guiding structure of this utility model.

[0039] Figure 4 This is a schematic diagram of the second embodiment of the static mixing and guiding structure of this utility model.

[0040] Figure 5 This is a schematic diagram of the structure of a single fluid disturbance mechanism of this utility model.

[0041] Figure 6 This is a schematic diagram of the integrated series-connected fluid disturbance mechanism of this utility model.

[0042] Figure 7 This is a cross-sectional view of the fluid disturbance mechanism of the integrated series chamber of this utility model.

[0043] Figure 8 This is a schematic diagram of the online fluid proportioning and mixing system of Embodiment 3 of this utility model.

[0044] Figure 9 This is a schematic diagram of the structure of the online fluid proportioning and mixing system with automatic cleaning function in Embodiment 4 of this utility model.

[0045] Figure 10 This is a schematic diagram of the printing device according to Embodiment 5 of this utility model.

[0046] Figure 11 This is a schematic diagram showing the installation relationship between the second accommodating space of the second mixing device and the ultrasonic vibration source.

[0047] 1. Flow guiding device; 11. Static mixing flow guiding structure; 11A. First static mixing flow guiding structure; 11B. Second static mixing flow guiding structure; 11C. Third static mixing flow guiding structure; 111. First fluid path; 112. Second fluid path; 2. First mixing device; 21. First accommodating space; 211. Chamber; 22. Fluid disturbance mechanism; 221. Rotating part; 222. Rotation drive mechanism; 3. Second mixing device; 31. Second accommodating space; 32. Ultrasonic vibration source; 4. Fluid input source; 5. Metering control device; 6. Fluid conveying device; 7. Cleaning fluid supply device; 8. Flow direction control device; 9. Printing module; 10. Control unit. Detailed Implementation

[0048] The present invention will be further described below with reference to the accompanying drawings and specific embodiments.

[0049] The purpose of this invention is to replace the existing color separation printing or premixed printing with an online mixing method, thereby solving the problem of uneven color separation printing and the problems of reduced production efficiency and batch color difference caused by premixed printing. However, online real-time mixing of fluids is currently difficult to solve and apply, and it cannot be achieved simply by combining color separation printing and premixing. During fluid flow, the fluidity and mixing uniformity are affected by fluid dynamics. During mixing, different components of the fluid need to achieve uniform distribution through continuous diffusion and convection, which usually requires sufficient time and space for the fluid molecules or particles to fully contact and exchange positions. Especially under high mixing ratios or high flow rates, it is difficult to achieve a uniform mixing effect in a short time and a small space. The requirement of online mixing is to complete mixing while conveying in a short time and a small space without affecting the fluid properties. This is precisely the technical challenge that this application addresses.

[0050] This invention enables the fluid to be divided and merged through a passive mixing static mixing guide structure 11, and to be agitated by a fluid disturbance mechanism 22 through a first mixing device 2 that provides kinetic energy for active mixing. This allows the fluid molecules or particles to fully contact and exchange positions during the transport process, achieving more uniform mixing and thus a more uniform printing effect.

[0051] Example 1, as Figure 1As shown, this application relates to an online fluid mixing system applied in a printing device. The system includes: an input interface and an output interface; a flow guiding device 1 having a static mixing flow guiding structure 11 configured to allow fluid to split and merge when passing through the static mixing flow guiding structure 11; and a first mixing device 2 having a first receiving space 21 for accommodating fluid and a fluid disturbance mechanism 22. The system includes the flow guiding device 1 and the first mixing device 2, which can be connected in series between the input interface and the output interface in any arrangement or combination order to achieve continuous online mixing of fluid from the input interface to the output interface.

[0052] The flow guiding device 1 has a static mixing flow guiding structure 11, configured to allow fluid to split and merge as it passes through the static mixing flow guiding structure 11. The static mixing flow guiding structure 11 is used to control the direction of fluid flow by changing the flow path of the fluid, thereby increasing diffusion and convection, and enabling fluid molecules or particles to fully contact and exchange positions. The flow guiding device 1 can mix fluids during flow and can even be used as a connecting component between different devices. It provides instantaneous and efficient mixing, can exist in a compact structure, and is a static mixing flow guiding structure 11. Online mixing systems often require a stable fluid flow rate, making the static flow guiding device 1 very suitable.

[0053] In one embodiment, the static mixing guide structure 11 includes a first fluid path 111 and a second fluid path 112; the second fluid path 112 is configured to divert fluid flowing through the first fluid path 111, and the first fluid path 111 is configured to merge fluid flowing through the second fluid path 112.

[0054] The flow guiding device 1 can be made of rigid or flexible materials. A flexible flow guiding device 1 is more adaptable to different needs, especially suitable for confined spaces, as it can accommodate longer flow paths through curved pathways. The flexible flow guiding device 1 can be made of plastic, rubber, synthetic materials, etc.

[0055] The first mixing device 2 has a first receiving space 21 for containing fluid and a fluid agitation mechanism 22, which enhances the mixing effect of the fluid through the movement of a specific mechanical structure. The fluid agitation mechanism 22 promotes fluid agitation and mixing, and may include agitation methods such as mechanical stirring, ultrasonic agitation, electromagnetic agitation, and vibration agitation. The first mixing device 2 provides a dynamic mixing method, in which the agitation applied to the fluid can rapidly disperse the components in the fluid.

[0056] As described above, the static mixing of the flow guiding device 1 passively mixes the fluids through the diversion and merging of the static mixing flow guiding structure 11, reducing the thickness of the stratification of different fluid components and increasing the mixing interface between fluids, thereby improving mixing efficiency from different dimensions. Meanwhile, the dynamic mixing of the first mixing device 2 actively mixes the fluids through strong fluid dynamics, enhancing the mixing between fluids. Furthermore, the mixing process can be completed in real time during online fluid transport; the flow guiding device 1 mixes the fluids while transporting them. The first mixing device 2 does not require valves to temporarily confine the fluids in a fixed chamber before or after it, and it also agitates the fluids while they are flowing. This greatly improves production efficiency.

[0057] Furthermore, combining static and dynamic mixing can ensure effective mixing while optimizing energy consumption and maintenance costs. Dynamic mixing is suitable for fluids with high viscosity or requiring strong shear, while static mixing is better suited for fluids with low viscosity and stable flow rates. Using both in an online mixing system can accommodate a wider range of fluid viscosities.

[0058] In this embodiment, if Figure 1 As shown, the flow guiding device 1, the first mixing device 2, the flow guiding device 1, the first mixing device 2 and the flow guiding device 1 are connected in sequence, and finally connected to the print head.

[0059] The following is a description and explanation of the fluid mixing process of this application: Fluids from different components flow into the flow guiding device 1 through the input interface. The fluids are then divided and merged by the static mixing flow guiding structure 11, allowing the different components to undergo initial mixing through diffusion and convection, resulting in partial fusion between the different fluid components. Next, the fluid flows into the first mixing device 2, where the fluid agitation mechanism 22 strongly agitates the fluid, enhancing the mixing and performing secondary mixing. At this point, large particles of different fluids make full contact and exchange positions. Third, using the same principle, the fluid flows through the flow guiding device 1 and the first mixing device 2, ensuring that smaller particles of different fluids make full contact and exchange positions. Finally, the fluid is further mixed by the flow guiding device 1 during delivery to ensure uniform mixing before flowing into the print head. At this point, the ejected fluid has completed mixing.

[0060] Example 2, as Figure 2 As shown, the online fluid mixing system of this application includes a flow guiding device 1, a first mixing device 2, and a second mixing device 3, having a second containing space 31 for containing fluid and an ultrasonic vibration source 32; wherein, the flow guiding device 1, the first mixing device 2, and the second mixing device 3 can be connected in series between the input interface and the output interface in any number and in any arrangement and order to realize continuous online mixing of fluid from the input interface to the output interface. Figure 2 and Figure 11 As shown, the ultrasonic vibration source 32 is installed on the outer wall of the second accommodating space 31. The high-frequency vibration of the ultrasonic waves enables different components in the fluid to be fully broken down and dispersed, achieving uniform mixing at the nanoscale. Therefore, ultrasonic waves can reduce particle agglomeration. More importantly, ultrasonic mixing can complete the mixing process in a very short time, which means that mixing can be carried out simultaneously in the short time it flows through the second mixing device 3, without the need to install valves to temporarily stop the fluid in a fixed chamber to wait for mixing to complete.

[0061] In one implementation, the inner wall of the static mixing guide structure 11 has a smooth arc. This reduces fluid accumulation and residue, facilitates cleaning during fluid replacement, and improves maintenance efficiency.

[0062] In one implementation, the static mixing guide structure 11 is a spiral structure. The spiral structure helps to further improve the mixing effect without increasing the installation volume or mixing time. Furthermore, the structure is relatively more compact on devices with limited installation space.

[0063] As one implementation method, such as Figure 3 As shown, the static mixing guide structure 11 includes a flow channel inlet and a flow channel outlet. The first fluid path 111 includes a main path and has a first end and a second end. The first end of the first fluid path 111 is connected to the flow channel inlet, and the second end of the first fluid path 111 is connected to the flow channel outlet.

[0064] The second fluid path 112 includes a plurality of first arc-shaped paths and a plurality of second arc-shaped paths, wherein the first arc-shaped paths form a closed loop with the main path, the second arc-shaped paths form a closed loop with the main path, and the first arc-shaped paths and the second arc-shaped paths are sequentially arranged on both sides of the main path.

[0065] As fluid flows, it splits into two paths at each intersection of the first main fluid path and the second fluid path 112, and then the two paths merge and accelerate at the next intersection. The Tesla valve is a specific embodiment that reduces resistance during forward flow, optimizes the fluid flow path, and thus reduces the total pressure loss of the fluid flow. During reverse flow, it exhibits higher flow resistance, achieving unidirectional flow characteristics and preventing fluid backflow.

[0066] Especially in online ink mixing, preventing fluid backflow is crucial. Backflow can contaminate the sources of different fluid components or affect the ink formulation ratios at different times. Tesla valves can better prevent this problem.

[0067] As an implementation method, Figure 4 As shown, the static mixing and guiding structure 11 includes a flow channel inlet and a flow channel outlet. The number of first fluid paths 111 is multiple segments, each segment having a first end and a second end. The number of second fluid paths 112 is one or more groups, each group of second fluid paths 112 including multiple parallel branch paths. One end of each group of second fluid paths 112 is connected to the second end of one first fluid path 111, and the other end is connected to the first end of the next first fluid path 111. The first fluid paths 111 and second fluid paths 112 are connected sequentially end-to-end. The first end of the first first fluid path 111 is connected to the flow channel inlet, and the second end of the last first fluid path 111 is connected to the flow channel outlet. This is another implementation of the static mixing and guiding structure 11, which is simple and efficient, and can be made of flexible materials and coiled in any installation path.

[0068] As some implementation methods, such as Figure 5 As shown, the fluid disturbance mechanism 22 includes: a rotating part 221, including at least one disturbance blade, configured to provide shear force to the fluid; and a rotation drive mechanism 222 for driving the rotating part 221 to rotate. Shear disturbance can mix different components in the fluid more quickly than other disturbances. Extremely high shear velocities are generated in the gap between the inner wall of the first receiving space 21 and the disturbance blade, resulting in high velocity differences and turbulent fluid flow in the fluid, which disrupts the laminar state and induces turbulence. The turbulent flow can induce mass transfer across the fluid layer, improving the mixing efficiency of different components of the fluid.

[0069] As an implementation method, Figure 6-7 As shown, the first accommodating space 21 includes an inlet, an outlet, and several integrated, series-connected chambers. The rotating part 221 is installed in each chamber. The inlet, the through-hole, and the outlet form a tortuous flow path. The integration of several series-connected chambers, employing multi-stage shear force, effectively increases the frequency of active fluid mixing within a limited space. The tortuous flow path also increases the time and space for fluid mixing, allowing fluid molecules or particles to fully contact and exchange positions.

[0070] In one implementation, the chambers are detachably connected. This detachable connection facilitates targeted maintenance, thereby improving maintenance efficiency.

[0071] Secondly, in embodiment three, as... Figure 8As shown, this application relates to an online fluid mixing system, comprising at least two fluid input sources 4, the fluid input sources 4 being used to provide fluids to be mixed; a metering control device 5, configured to accurately measure and control the fluid volume of each fluid input source 4; a fluid delivery device, configured to apply energy to the fluid to force the fluid to flow in a preset direction; a control unit 10, configured to control the operation of the metering control device 5 and the fluid delivery device; and, as described in the first aspect, the online fluid mixing system is configured to perform online mixing of the fluids from the fluid input sources 4.

[0072] In order to achieve online mixing, the online proportioning process is also a very important step.

[0073] The fluid input source 4 can be an ink cartridge that supplies ink on the printing device, or it can be any other structure that can supply the corresponding fluid.

[0074] The metering control device 5 may include a valve, a flow meter, a weight meter, or other metering devices.

[0075] Fluid transport devices generally refer to transport pumps, such as diaphragm pumps, gear pumps, centrifugal pumps, peristaltic pumps, etc., but can also refer to other devices with equivalent functions.

[0076] This application discloses an online fluid proportioning and mixing system that enables true simultaneous proportioning and mixing. By automatically and precisely controlling the formula ratio, it eliminates manual operation, achieving a high degree of automation and high production efficiency.

[0077] In one embodiment, the proportioning control unit 10 includes an interface for communicating with the metering control device 5 and the fluid delivery device, as well as a memory storing mixing formula data, which is used to guide the proportioning control unit 10 to achieve fluid proportioning.

[0078] Therefore, using standardized mixing formula data can improve the quality consistency of multiple batches. This helps improve quality and reduce repetitive labor and raw material waste.

[0079] The fluid online mixing system described in the first aspect is the same as described in the first aspect, so it will not be repeated here.

[0080] Thirdly, in embodiment four, as... Figure 9As shown, this application relates to an online fluid mixing system with automatic cleaning function, including a cleaning fluid supply device 7; an online fluid mixing system as described in the second aspect; the online fluid mixing system includes at least two fluid input sources 4, a metering control device 5, a fluid delivery device, a control unit 10, and an online fluid mixing system; a flow direction control device 8 having at least two input terminals and one output terminal; the input terminals are respectively connected to the cleaning fluid supply device 7 and the fluid input sources 4; the output terminal is connected to the fluid delivery device; the control unit 10 is further configured to control the flow direction control device 8 to achieve switching between the cleaning fluid supply device 7 and the fluid input sources 4, thereby selectively delivering the cleaning fluid or the fluid from the fluid input sources 4 to the online fluid mixing system.

[0081] In online mixing systems, especially where frequent switching of fluid composition ratios is required, automatic cleaning is crucial. Maintenance efficiency, and more specifically, cleaning efficiency and the degree of cleanliness, are often the primary concerns. In this embodiment, a simple flow control device 8 enables switching between the cleaning fluid supply device 7 and the fluid input source 4. This flow control device 8 can be a three-way solenoid valve. When online mixing is required, the flow to the cleaning fluid supply device 7 is cut off, and the fluid input source 4 is connected to the fluid delivery device. When cleaning is required, the flow to the fluid input source 4 is cut off, and the cleaning fluid supply device 7 is connected to the fluid delivery device.

[0082] Furthermore, the static mixing guide structure 11 of the fluid online proportioning and mixing system described in the first aspect has a simple structure, high cleaning efficiency, low maintenance cost, and low failure rate because it has no moving parts.

[0083] The fluid online mixing system described in the first aspect is the same as described in the first aspect, so it will not be repeated here.

[0084] Fourthly, in Example 5, as... Figure 10 As shown, this application relates to a printing device, including the fluid online mixing system described in the first aspect, and a printing module 9; the fluid online mixing system includes an output interface connected to the printing module 9.

[0085] The fluid online mixing system described in the first aspect is the same as described in the first aspect, so it will not be repeated here.

[0086] In the description of this specification, references to terms such as "an embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0087] Although embodiments of the present invention have been shown and described above, they should not be construed as limiting the scope of the claims. The present invention is not limited to the above embodiments, and variations in its specific structure are permitted. All changes made within the scope of the independent claims of the present invention are within the scope of protection of the present invention.

Claims

1. A fluid online mixing system, characterized in that, The system, used in printing equipment, includes an input interface and an output interface. A flow guiding device having a static mixing flow guiding structure, configured to enable the fluid to split and merge as it passes through the static mixing flow guiding structure; The first mixing device has a first containment space for containing fluid and a fluid agitation mechanism; The system includes a flow guiding device and a first mixing device that can be connected in series between the input interface and the output interface in any arrangement or combination order to achieve continuous online mixing of fluid from the input interface to the output interface.

2. The online fluid mixing system according to claim 1, characterized in that, It also includes a second mixing device, having a second containment space for containing fluid and an ultrasonic vibration source; wherein the flow guiding device, the first mixing device and the second mixing device can be connected in series between the input interface and the output interface in any number and in any arrangement and combination order to realize continuous online mixing of fluid from the input interface to the output interface.

3. The online fluid mixing system according to claim 1, characterized in that, The static mixing and guiding structure includes a first fluid path and a second fluid path; the second fluid path is configured to divert fluid flowing through the first fluid path, and the first fluid path is configured to merge fluid flowing through the second fluid path.

4. The online fluid mixing system according to claim 1, characterized in that, The inner wall of the static mixing and guiding structure has a smooth arc.

5. The online fluid mixing system according to claim 1, characterized in that, The static mixing and guiding structure is a spiral structure.

6. The online fluid mixing system according to claim 3, characterized in that, The static mixing guide structure includes a flow channel inlet and a flow channel outlet. The first fluid path includes a main path and has a first end and a second end; the first end of the first fluid path is connected to the inlet of the flow channel, and the second end of the first fluid path is connected to the outlet of the flow channel. The second fluid path includes a plurality of first arc-shaped paths and a plurality of second arc-shaped paths, wherein the first arc-shaped paths form a closed loop with the main path, the second arc-shaped paths form a closed loop with the main path, and the first arc-shaped paths and the second arc-shaped paths are sequentially arranged on both sides of the main path.

7. The online fluid mixing system according to claim 3, characterized in that, The static mixing guide structure includes a flow channel inlet and a flow channel outlet. The number of the first fluid path is multiple segments, and each segment of the first fluid path has a first end and a second end; The number of the second fluid paths is one or more groups, and each group of the second fluid paths includes multiple parallel branch paths; one end of each group of the second fluid paths is connected to the second end of one of the first fluid paths, and the other end is connected to the first end of the next first fluid path; the first fluid paths and the second fluid paths are connected end to end in sequence. The first end of the first fluid path is connected to the inlet of the flow channel, and the second end of the last fluid path is connected to the outlet of the flow channel.

8. The online fluid mixing system according to claim 1, characterized in that, The fluid disturbance mechanism includes: The rotating part, including at least one disturbance blade, is configured to provide shear force to the fluid; A rotary drive mechanism is used to drive the rotating part to rotate.

9. The online fluid mixing system according to claim 8, characterized in that, The first accommodating space includes a first accommodating space entrance, a first accommodating space exit, and several integrated, series-connected chambers; each of the chambers is connected to the others through a through hole. The rotating part is installed in each of the chambers, and the first receiving space inlet, the through hole and the first receiving space outlet form a tortuous flow path.

10. The online fluid mixing system according to claim 9, characterized in that, The chambers are detachably connected.

11. A fluid online proportioning and mixing system, characterized in that, It includes at least two fluid input sources, which are used to provide the fluids to be mixed; The metering and control device is configured to accurately measure and control the amount of fluid from each fluid input source; A fluid transport device is configured to apply energy to a fluid, forcing the fluid to flow in a predetermined direction; The control unit is configured to control the operation of the metering control device and the fluid delivery device; And, the online fluid mixing system as described in any one of claims 1-10, is configured to perform online mixing of the fluid from the fluid input source.

12. The online fluid proportioning and mixing system according to claim 11, characterized in that, The control unit includes an interface for communicating with a metering control device and a fluid delivery device, as well as a memory storing mixing formula data, which guides the control unit to achieve fluid proportioning.

13. A fluid online proportioning and mixing system with automatic cleaning function, characterized in that, Includes cleaning fluid supply device; The online fluid proportioning and mixing system as described in claim 11 or 12; the online fluid proportioning and mixing system includes at least two fluid input sources, a metering and control device, a fluid delivery device, a control unit, and an online fluid mixing system; A flow control device has at least two input terminals and one output terminal; the input terminals are respectively connected to the cleaning fluid supply device and the fluid input source; the output terminal is connected to the fluid delivery device. The control unit is also configured to control the flow control device to switch between the cleaning fluid supply device and the fluid input source, thereby selectively delivering the cleaning fluid or the fluid from the fluid input source to the online fluid mixing system.

14. A printing device, characterized in that, The system includes an online fluid mixing system as described in any one of claims 1-10, and a printing module; the online fluid mixing system includes an output interface connected to the printing module.

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