Non-contact liquid circulation device

Abstract

The utility model is applicable to the field of stirring and mixing devices, and provides a non-contact liquid circulating device which comprises a first liquid storage container, at least one second liquid storage container and a non-contact circulating pump, the first liquid storage container is provided with a first output port and a first input port, the first output port is communicated with the first multi-outlet connector, and the first input port is communicated with the second multi-outlet connector; wherein the first multi-outlet joint and the second multi-outlet joint are respectively communicated through a main passage and an auxiliary passage; each second liquid storage container is communicated with the auxiliary passage; the non-contact circulating pump is used for extracting a solution from the first liquid storage container in a non-contact manner; a part of the extracted solution flows into the first liquid storage container through the main passage; part of the extracted solution flows into the second liquid storage container and the first liquid storage container through the auxiliary channel. Based on the technical scheme provided by the utility model, the effects of avoiding overlarge pulse pressure of the solution and avoiding layering of the solution can be considered at the same time.

Description

Technical Field

[0001] The utility model belongs to the technical field of stirring and mixing devices, and particularly relates to a non-contact liquid circulation device. Background Art

[0002] The storage of solutions that are prone to precipitation and agglomeration often faces the problem of liquid stratification. Liquid stratification can lead to the precipitation of components in the liquid, resulting in the loss of the original liquid components and even the unique functions of the original liquid. For example, in an inkjet printing system, once the highly active ink is stratified, the precipitated substances can easily clog the nozzles, and once blocked, it is basically impossible to clean and unclog, which has always been a major problem plaguing the digital printing field. To prevent liquid stratification, a stirring and mixing device needs to be used to maintain the fluidity of the liquid, thereby reducing the sedimentation, agglomeration, and precipitation of liquid components.

[0003] However, the existing stirring devices have problems that they cannot simultaneously avoid excessive pulse pressure of the solution and avoid solution stratification. Summary of the Utility Model

[0004] To solve the above problems existing in the related art, the utility model provides a non-contact liquid circulation device. The technical problems to be solved by the utility model are realized through the following technical solutions:

[0005] A non-contact liquid circulation device, the device includes: a first liquid storage container, at least one second liquid storage container, and a non-contact circulation pump; the first liquid storage container has a first output port and a first input port, the first output port is communicated with a first multi-outlet joint, and the first input port is communicated with a second multi-outlet joint; wherein, the first multi-outlet joint and the second multi-outlet joint are respectively communicated through a main path and an auxiliary path; each second liquid storage container is communicated with the auxiliary path; the non-contact circulation pump is arranged on the first output port for non-contact extraction of the solution from the first liquid storage container through the first output port; wherein, a part of the extracted solution flows into the first liquid storage container through the first multi-outlet joint, the main path, the second multi-outlet joint and the first input port; a part of the other part of the extracted solution flows into the second liquid storage container through the auxiliary path, and the remaining solution of the other part of the extracted solution flows into the first liquid storage container through the first multi-outlet joint, the auxiliary path, the second multi-outlet joint and the first input port.

[0006] In some embodiments, filters are provided at both the solution inlet end and the solution outlet end of the auxiliary path.

[0007] In some embodiments, the input port of each second liquid storage container is communicated with the auxiliary path through a multi-outlet joint.

[0008] In some embodiments, each of the second liquid storage containers further has an outlet. The inlet of each second liquid storage container is in communication with the solution inlet end of the auxiliary passage, and the outlet of each second liquid storage container is in communication with the solution outlet end of the auxiliary passage.

[0009] In some embodiments, the multi-outlet joint is a Y-shaped three-way joint; the first multi-outlet joint is a first Y-shaped three-way joint, and the second multi-outlet joint is a second Y-shaped three-way joint. Among them, one interface of the first Y-shaped three-way joint is connected to the first outlet, and the other interface of the first Y-shaped three-way joint is in communication with one interface of the second Y-shaped three-way joint through a pipeline to form the main passage. The remaining one interface of the first Y-shaped three-way joint is in communication with the remaining one interface of the second Y-shaped three-way joint through a pipeline to form the auxiliary passage; the remaining one interface of the second Y-shaped three-way joint is connected to the first inlet.

[0010] In some embodiments, the angle between the joints of the multi-outlet joint is adjustable.

[0011] In some embodiments, the non-contact circulation pump is a peristaltic pump or a diaphragm pump.

[0012] In some embodiments, the first liquid storage container is an external ink cartridge of an inkjet printing system, and the second liquid storage container is an internal ink cartridge of the inkjet printing system.

[0013] In some embodiments, the solution includes: a colloidal solution, a suspension, or a mixed solution of both.

[0014] In some embodiments, at least one first filter is provided between the solution inlet end of the auxiliary passage and the inlet of each second liquid storage container, and at least one second filter is further provided between the solution outlet end of the auxiliary passage and the inlet of each second liquid storage container.

[0015] The utility model has the following beneficial technical effects: Aiming at the problem that the existing stirring device cannot simultaneously avoid excessive pulse pressure of the solution and avoid solution stratification, the utility model provides a non-contact liquid circulation device. By setting a main passage and an auxiliary passage between the first liquid storage container and the second liquid storage container, the flow direction of the solution pumped by the non-contact circulation pump from the first liquid storage container is divided into two paths. One path returns to the first liquid storage container, and the other path enters the second liquid storage container. In this way, firstly, the stirring speed of the solution in the first liquid storage container can be increased, and the possibility of liquid stratification can be reduced; secondly, the flow rate of the solution entering the second liquid storage container can be reduced, greatly reducing the internal pressure fluctuation of the second liquid storage container and reducing the influence of solution pulse on the internal pressure of the second liquid storage container; thirdly, chemical reactions caused by the contact of the solution with other objects can be avoided, ensuring the specific functions of the original solution and greatly reducing the influence of the stirring device on the solution.

[0016] The following will further describe the present utility model in detail with reference to the accompanying drawings and embodiments. Brief Description of the Drawings

[0017] Figure 1 is a working schematic diagram of a conventional liquid circulation device applied to an inkjet printing device provided by the present utility model;

[0018] Figure 2 is a structural block diagram of a non-contact liquid circulation device provided by the present utility model;

[0019] Figure 3 is an example diagram of a non-contact liquid circulation device provided by the present utility model;

[0020] Figure 4 is an example diagram of a method for reducing the influence of solution pulse provided by the present utility model;

[0021] Figure 5 is provided by the present utility model in Figure 2 Example diagram of adding at least one second liquid storage container on the basis;

[0022] Figure 6 is an example diagram of a non-contact liquid circulation device applied to the biochemical field provided by the present utility model.

[0023] Reference Signs:

[0024] 1 - Peristaltic pump; 2 - Printer built-in ink cartridge; 3 - Nozzle; 4 - Electric stirrer and impeller thereon; 5 - External large ink cartridge; 10 - First liquid storage container; 20 - Second liquid storage container; 30 - Non-contact circulation pump; 40 - First multi-outlet joint; 50 - Second multi-outlet joint; 60 - Filter; 11 - First output port; 12 - First input port; 61 - First filter; 62 - Second filter. Detailed implementation manners

[0025] The following further describes the present utility model in detail with reference to specific embodiments, but the implementation manners of the present utility model are not limited thereto.

[0026] Figure 1 It is a working schematic diagram of a conventional liquid circulation device applied to an inkjet printing device provided by the present utility model. As Figure 1 shown, the red line segments are the ink inlet pipe and the ink outlet pipe. The green line refers to the peristaltic pump 1, which is arranged on one of the red line segments. The gray line refers to the built-in ink cartridge 2 of the printer, which is used to supply ink to the print head 3. The purple frame is the print head 3, which is located below the gray line. The blue line refers to an electric stirrer and the impeller 4 thereon. The black line refers to the external large ink cartridge 5. During operation, the peristaltic pump 1 extracts the ink in the external large ink cartridge 5 and discharges it into the built-in ink cartridge 2. At the same time, a part of the ink in the built-in ink cartridge 2 enters the external large ink cartridge 5 through the ink outlet pipe. Through the ink inlet pipe, the ink outlet pipe and the peristaltic pump 1, a stirring cycle is formed between the external large ink cartridge 5 and the built-in ink cartridge 2.

[0027] In the actual application process, in order to prevent the pumping force of the pump from being too small, resulting in a reduced stirring effect on the liquid, and thus causing sedimentation, aggregation and precipitation of the components in the ink, a peristaltic pump with high power or large flow rate is often used. When the peristaltic pump 1 extracts the solution, it will inevitably cause solution pulses. The solution with different pressures enters the liquid receiving device and the print head, which will cause pressure fluctuations inside the liquid receiving device, resulting in a negative pressure inside the built-in ink cartridge 2, and the ink at the ink pad under the print head 3 will flow back into the print head, causing ink mixing, which seriously affects the printing quality. Even if the pulse effect caused by the pump is not considered, using a peristaltic pump with high power or large flow rate will also cause excessive pressure in the cavity of the print head, resulting in ink spraying out of the print head and polluting the printed content. If the pulse pressure is too large and the stirring speed is reduced to avoid it, it will cause the ink to not be stirred well, resulting in ink precipitation or even stratification, losing its specific functions, thus affecting the printing effect. And if the printer is not used frequently, the precipitates will even cause blockage of the red ink inlet pipe and ink outlet pipe with a scale of 1-2 millimeters in the figure. Although this problem can be solved by increasing the liquid flow rate in the red pipe, this will cause a significant increase in the pressure at the built-in ink cartridge 2, resulting in ink flowing out at the print head even when not printing, polluting the printing material. In addition, the existing stirring devices generally use ordinary plastics or stainless steels, but many inks can react chemically or physically with such materials. In addition, the stirring impeller may also contaminate the ink.

[0028] Aiming at the problem that the existing stirring devices cannot simultaneously take into account avoiding excessive solution pulse pressure and avoiding solution stratification, the present utility model provides a non-contact liquid circulation device. Now, in combination with Figure 2 the device will be described in detail. Figure 2It is the structural block diagram of the non-contact liquid circulation device provided by the present utility model. As Figure 2 shown, among them, the main passage is represented by a red line segment, and the auxiliary passage is represented by a blue line segment; the device includes: a first liquid storage container 10, at least one second liquid storage container 20, and a non-contact circulation pump 30; the first liquid storage container 10 has a first output port and a first input port, the first output port 11 is communicated with a first multi-outlet joint 40, and the first input port is communicated with a second multi-outlet joint 50; wherein, the first multi-outlet joint 40 and the second multi-outlet joint 50 are communicated with each other through the main passage and the auxiliary passage respectively; each second liquid storage container 20 is communicated with the auxiliary passage; the non-contact circulation pump 30 is arranged on the first output port 11 and is used for non-contactedly extracting the solution from the first liquid storage container 10 through the first output port 11; wherein, a part of the extracted solution flows into the first liquid storage container 10 through the first multi-outlet joint 40, the main passage, the second multi-outlet joint 50 and the first input port; a part of the other part of the extracted solution flows into the second liquid storage container 20 through the auxiliary passage, and the remaining solution of the other part of the extracted solution flows into the first liquid storage container 10 through the first multi-outlet joint 40, the auxiliary passage, the second multi-outlet joint 50 and the first input port 12.

[0029] Here, the introduction of the "first liquid storage container 10" and the "second liquid storage container 20" is only for distinguishing the two. Here, the first liquid storage container 10 can be understood as a container for storing a large volume of solution for a long time, and the second liquid storage container 20 can be understood as a container for temporarily storing a small volume of solution.

[0030] Here, the solution includes: a colloidal solution, a suspension or a mixed solution of the two. In other words, the solution stored in the first liquid storage container 10 or the second liquid storage container 20 is a highly active solution that is easy to precipitate, coagulate or react chemically with other substances.

[0031] Here, the non-contact circulation pump 30 is a peristaltic pump or a diaphragm pump. In a specific implementation manner, the non-contact circulation pump 30 adopts a Kamoer brand NKP-DC-S06B peristaltic pump, or an American Graco brand DF3525husky2150 pneumatic diaphragm pump. It should be noted that the non-contact circulation pump 30 can also be other types of pumps here.

[0032] Here, the input port of each second liquid storage container 20 is communicated with the auxiliary passage through a multi-outlet joint. And each second liquid storage container 20 also has an output port. The input port of each second liquid storage container 20 is communicated with the solution inflow end of the auxiliary passage, and the output port of each second liquid storage container 20 is communicated with the solution outflow end of the auxiliary passage.

[0033] Here, one joint of the multi-outlet joint allows the solution to flow in, and the other joints of the multi-outlet joint allow the solution to flow out. Among them, the solution outflow capacity allowed by each joint is different. In one possible implementation, the multi-outlet joint is a Y-shaped three-way joint, and the first multi-outlet joint 40 is the first Y-shaped three-way joint, and the second multi-outlet joint 50 is the second Y-shaped three-way joint; wherein, one interface of the first Y-shaped three-way joint is connected to the first outlet 11, and the other interface of the first Y-shaped three-way joint is connected to one interface of the second Y-shaped three-way joint through a pipeline to form a main path, and the remaining one interface of the first Y-shaped three-way joint is connected to the other interface of the second Y-shaped three-way joint through a pipeline to form an auxiliary path; the remaining one interface of the second Y-shaped three-way joint is connected to the first inlet 12.

[0034] Here, the main path can be a rigid pipe with a fixed bending angle or a bendable rubber pipe. Also, the pipelines for connecting each device on the auxiliary path can be pipes with a fixed shape or bendable hoses.

[0035] It should be noted that the type of the multi-outlet joint here is not limited to the Y-shaped three-way joint, and can also be a T-shaped joint, a four-way joint, or a five-way joint. In actual application scenarios, the type of the multi-outlet joint can be selected according to the actual needs of users.

[0036] Here, filters 60 are provided at both the solution inflow end and the solution outflow end of the auxiliary path. Specifically, at least one first filter 61 is provided between the solution inflow end of the auxiliary path and the inlet of each second liquid storage container 20, and at least one second filter 62 is further provided between the solution outflow end of the auxiliary path and the inlet of each second liquid storage container 20. By providing filters on the auxiliary path, the escaped bubbles and precipitated impurities in the solution can be filtered, reducing the probability of bubbles entering the second liquid storage container 20 to a certain extent, and reducing the possibility of blockage of the auxiliary path, the Y-shaped three-way joint, and the second liquid storage container 20.

[0037] Figure 3 is an example diagram of the non-contact liquid circulation device provided by the present utility model. As Figure 3 shown, in one possible implementation, the non-contact liquid circulation device provided by the present utility model is applied to an inkjet printing device. Exemplarily, the specific model of the inkjet printing device is an Epson L805 printer. Among them, the first liquid storage container 10 (i.e., the external liquid storage container) is an external ink cartridge of the inkjet printing system, the second liquid storage container 20 (i.e., the liquid receiving device) is an internal ink cartridge of the inkjet printing system, only one second liquid storage container 20 is connected on the auxiliary path, and a printing head is connected to the lower end of the liquid receiving device. As Figure 3As shown, the three connectors of the Y-shaped tee joint are represented by symbols A, B, and C respectively. Specifically, in the Y-shaped tee joint, connector A allows the solution to flow in and allows the solution to flow out through connectors B and C respectively. Among them, the diameter of connector C is larger than that of connector B, so the solution with a large flow rate flows out through connector C, and the solution with a small flow rate flows out through connector B. Among them, the flow direction of the solution in connector B is opposite to the flow direction of the solution in connector A. In the first Y-shaped tee joint, the connector connected to the first outlet 11 is connector A, the connector connected to the main passage is connector C, and the connector connected to the auxiliary passage is connector B; in the second Y-shaped tee joint, the connector connected to the main passage is connector A, the connector connected to the auxiliary passage is connector B, and the connector connected to the first inlet 12 is connector C. The solution stored in the first liquid storage container 10 or the second liquid storage container 20 is highly chemically active ink. During the working process, the (non-contact circulation) pump extracts the ink in the external ink cartridge. The ink flows into connectors B and C respectively through connector A of the first Y-shaped tee joint, and the solution flow rate in connector C is greater than that in connector B; a part of the extracted solution flows into the main passage through connector A and connector C, and then enters connector A of the second Y-shaped tee joint, and finally returns to the external ink cartridge through connector C of the second Y-shaped tee joint; a small part of the flow rate enters the auxiliary passage through connector A and connector B of the first Y-shaped tee joint: first, the possible bubbles are filtered in the filter, and then the flow is divided through the third Y-shaped tee joint connected to the liquid receiving device. A part of the flow rate flows into the liquid receiving device through connectors A and B of the third Y-shaped tee joint, and a large part of the flow rate enters the second filter 62 through connectors A and C of the third Y-shaped tee joint, and finally enters the external ink cartridge through connectors B and C of the second Y-shaped tee joint. Since a large part of the extracted ink flows back to the external ink cartridge, it has the effect of accelerating the stirring speed of the ink in the external ink cartridge and reducing the sedimentation, aggregation and precipitation of the ink components, and the ink entering the liquid receiving device is reduced, effectively reducing the influence of the solution pulse pressure on the internal pressure of the liquid receiving device and the internal pressure of the print head, ensuring the stability of the internal pressure of the liquid receiving device, and thus ensuring the printing quality.

[0038] Here, to further reduce the influence of the solution pulse, the included angle between the connectors of the multi-outlet joint can be adjusted. By adjusting the included angle between the connectors of the Y-shaped tee joint, the solution flow rate flowing into the second liquid storage container 20 is adjusted, and the influence of the solution pulse is reduced. Or the influence can be further reduced by increasing the number of Y-shaped tee joints to further reduce the solution flow rate flowing into the second liquid storage container 20. Figure 4 is an example diagram of the method for reducing the influence of the solution pulse provided by the present utility model. As Figure 4As shown in (1) therein, any one of the connectors A, B, or C of the Y-shaped three-way joint can be horizontally rotated relative to the other connectors to change the angle between it and the other connectors. For example, the angle between connector A and connector B is α, and the value range of the angle α is 0 to 180°. The smaller the value of the angle α, the smaller the flow rate of the solution flowing through connectors A and B; the larger the value of the angle α, the larger the flow rate of the solution flowing through connectors A and B. As Figure 4 As shown in (2) therein, it is also possible to connect another Y-shaped three-way joint in series after connector B of the Y-shaped three-way joint. The more the number of series connections, the more the flow is divided, and finally the flow rate of the solution flowing out of connector B is smaller.

[0039] Here, in another possible implementation manner, the non-contact circulating pump 30 can also be arranged on the main path, that is, between the first Y-shaped three-way joint and the second Y-shaped three-way joint. Correspondingly, the installation methods of the first Y-shaped three-way joint and the second Y-shaped three-way joint are changed. Taking Figure 2 the first Y-shaped three-way joint and the second Y-shaped three-way joint in it as an example for illustration, one connector (i.e., connector C) of the first Y-shaped three-way joint is connected to the first output port 11 of the first liquid storage container 10, and another connector (i.e., connector A) of the first Y-shaped three-way joint is connected to one end of the non-contact circulating pump 30. Another connector (i.e., connector A) of the second Y-shaped three-way joint is connected to the first output port 11 of the first liquid storage container 10, and one connector (i.e., connector C) of the second Y-shaped three-way joint is connected to the other end of the non-contact circulating pump 30. The remaining one interface (i.e., connector B) of the first Y-shaped three-way joint and the remaining one interface (i.e., connector B) of the second Y-shaped three-way joint are connected through a pipeline to form an auxiliary path.

[0040] In a possible implementation manner, a plurality of second liquid storage containers 20 can be connected to the auxiliary path, and each second liquid storage container 20 is connected to the auxiliary path through a multi-outlet joint. Figure 5 is an example diagram provided by the present utility model with Figure 2 at least one second liquid storage container 20 added on the basis. As Figure 5 shown, two second liquid storage containers 20 are arranged in parallel.

[0041] In a possible implementation, the non-contact liquid circulation device provided by the present utility model can also be used in the field of biochemistry for performing microfluidic liquid transportation, such as the transportation of liquid in cell culture. Existing microfluidic liquid transportation devices often use precision syringes or complex and expensive systems composed of precision valves. However, such systems are often too costly and often unnecessary, as most cell cultures do not require a very high precision in liquid flow control. At the same time, suspended components or components that are prone to sedimentation or precipitation in the liquid are also likely to clog the precision valves. And if a precision syringe or a complex and expensive system composed of precision valves is not used, and a common simple device is used without any flow control, there will be a problem that it is impossible to simultaneously transport liquids with comparable flow rates to multiple microfluidic devices.

[0042] Here, the non-contact liquid circulation device provided by the present utility model adds some technical features on the basis described above, which can achieve the effects of flow control, cost savings, and prevention of solution precipitation and stratification. The technical features added here are: each second liquid storage container 20 also has an output port, the input port of each second liquid storage container 20 is connected to the solution inflow end of the auxiliary passage, and the output port of each second liquid storage container 20 is connected to the solution outflow end of the auxiliary passage. Taking Figure 6 as an example for illustration, Figure 6 is an example diagram of the non-contact liquid circulation device provided by the present utility model applied to the biochemical field. As Figure 6 shown, in the application scenario of cell culture liquid supply, the solution stored in the first liquid storage container 10 or the second liquid storage container 20 is a suspension, and the second liquid storage containers 20A, 20B, and 20C are all cell culture spaces. During the working process, the (non-contact circulation) pump extracts the liquid, and the liquid enters the second liquid storage containers 20A, 20B, and 20C through the first filter 61 and different types of three-way joints respectively. Among them, the flow rate and pressure entering the three containers are approximately the same. An output port is provided at the lower end of each second liquid storage container 20, and through a pipe with a fixed shape or a bendable hose, this output port is connected to the input end of the second filter 62 to input the liquid in the second liquid storage container 20 into the second filter 62.

[0043] In view of the problem that the existing stirring devices cannot simultaneously avoid excessive pulsed pressure of the solution and avoid solution stratification, the present utility model provides a non-contact liquid circulation device. By providing a main passage and an auxiliary passage between a first liquid storage container 10 and a second liquid storage container 20, the flow direction of the solution pumped by the non-contact circulation pump 30 from the first liquid storage container 10 is divided into two paths. One path returns to the first liquid storage container 10, and the other path enters the second liquid storage container 20. In this way, firstly, the stirring speed of the solution in the first liquid storage container 10 can be increased, and the possibility of liquid stratification can be reduced; secondly, the flow rate of the solution entering the second liquid storage container 20 can be reduced, greatly reducing the internal pressure fluctuation of the second liquid storage container 20 and reducing the influence of solution pulses on the internal pressure of the second liquid storage container 20; thirdly, chemical reactions caused by the contact of the solution with other objects can be avoided, ensuring the specific functions of the original solution and greatly reducing the influence of the stirring device on the solution.

[0044] It should be noted that in this article, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the term "comprising", "including" or any other variant thereof is intended to cover non-exclusive inclusion, so that a process, method, article or device comprising a series of elements not only includes those elements, but also includes other elements not expressly listed, or elements inherent to such process, method, article or device.

[0045] The above description shows and describes several preferred embodiments of the present utility model. However, as mentioned above, it should be understood that the present utility model is not limited to the form disclosed herein, should not be regarded as excluding other embodiments, but can be used in various other combinations, modifications and environments, and can be changed within the scope of the present utility model concept through the above teachings or the technology or knowledge in the relevant field. And any changes and variations made by those skilled in the art without departing from the spirit and scope of the present utility model shall fall within the protection scope of the appended claims of the present utility model.

Claims

1. A non-contact liquid circulation device, characterized in that: The device comprises: a first liquid storage container (10), at least one second liquid storage container (20), and a non-contact circulation pump (30); the first liquid storage container (10) has a first output port (11) and a first input port (12), the first output port (11) is connected to a first multi-outlet connector (40), and the first input port (12) is connected to a second multi-outlet connector (50); wherein: The first multi-outlet joint (40) and the second multi-outlet joint (50) are respectively connected via a main passage and an auxiliary passage; each second liquid storage container (20) is connected to the auxiliary passage; The non-contact circulation pump (30) is arranged on the first output port (11) and is used for non-contact extraction of solution from the first liquid storage container (10) through the first output port (11); wherein a portion of the extracted solution flows into the first liquid storage container (10) via the first multi-outlet joint (40), the main passage, the second multi-outlet joint (50) and the first input port (12); a portion of the solution in another portion of the extracted solution flows into the second liquid storage container (20) via the auxiliary passage, and the remaining solution in another portion of the extracted solution flows into the first liquid storage container (10) via the first multi-outlet joint (40), the auxiliary passage, the second multi-outlet joint (50) and the first input port (12).

2. The non-contact liquid circulation device according to claim 1, characterized in that: A filter (60) is provided at both the solution inflow end and the solution outflow end of the auxiliary passage.

3. The non-contact liquid circulation device according to claim 1, characterized in that: The input port of each second liquid storage container (20) is connected to the auxiliary passage through a multi-outlet joint.

4. The non-contact liquid circulation device according to claim 1 or 3, characterized in that: Each second liquid storage container (20) also has an output port, the input port of each second liquid storage container (20) is connected to the solution inflow end of the auxiliary passage, and the output port of each second liquid storage container (20) is connected to the solution outflow end of the auxiliary passage.

5. The non-contact liquid circulation device according to claim 1, characterized in that: The multi-outlet connector is a Y-type three-way connector; the first multi-outlet connector (40) is a first Y-type three-way connector, and the second multi-outlet connector (50) is a second Y-type three-way connector; wherein one interface of the first Y-type three-way connector is connected to the first output port (11), another interface of the first Y-type three-way connector is connected to one interface of the second Y-type three-way connector via a pipeline to form the main passage, and the remaining one interface of the first Y-type three-way connector is connected to another interface of the second Y-type three-way connector via a pipeline to form the auxiliary passage; and the remaining one interface of the second Y-type three-way connector is connected to the first input port (12).

6. The non-contact liquid circulation device according to claim 1, characterized in that: The angles between the joints of the multi-outlet joint are adjustable.

7. The non-contact liquid circulation device according to claim 1, characterized in that: The non-contact circulation pump (30) is a peristaltic pump or a diaphragm pump.

8. The non-contact liquid circulation device according to claim 1, characterized in that: The first liquid storage container (10) is an external ink cartridge of the inkjet printing system, and the second liquid storage container (20) is a built-in ink cartridge of the inkjet printing system.

9. The non-contact liquid circulation device according to claim 1, characterized in that: The solution includes: a colloidal solution, a suspension or a mixed solution of the two.

10. The non-contact liquid circulation device according to claim 3, characterized in that: At least one first filter (61) is arranged between the solution inflow end of the auxiliary passage and the input port of each second liquid storage container (20), and at least one second filter (62) is also arranged between the solution outflow end of the auxiliary passage and the input port of each second liquid storage container (20).

Images