Media delivery system

Abstract

The present invention relates to microfluidic technology, and particularly to a medium delivery system. A medium delivery system includes a driving component and a first flow channel. There is a driving medium and a working medium in the first flow channel. There is driving medium at both ends of the first flow channel, and the working medium is located between the driving media; both ends of the second flow channel are located between the two ends of the first flow channel. An inlet and an outlet communicating with an external pipeline are provided in the second flow channel. The working medium flows in the external pipeline. The working medium in the first flow channel and at least one second flow channel can flow along a first preset direction, so that the working medium flows from the inlet to the outlet. The driving component can drive the working medium in the first flow channel to flow in a direction opposite to the first preset direction through the driving medium to return to the initial position. The advantage is that the driving component indirectly drives the working medium through the driving medium, avoiding the mechanical structure in the driving component from damaging the biological medium.

Description

Technical Field

[0001] The present invention relates to microfluidic technology, and particularly to a medium delivery system. Background Art

[0002] The driving methods for transporting media in existing microfluidic systems remain the focus and difficulty of research. The main driving methods include micropump driving, magnetic bead driving, and centrifugal force driving, etc. However, when the transported medium is a biological fluid such as blood, the above driving methods will cause great damage to blood cells due to the static-dynamic gap, reducing hemolysis and coagulation. When the transported medium is an industrially highly corrosive fluid, the fluid will also corrode the driving structure, affecting the performance and service life. Summary of the Invention

[0003] Based on this, in view of the above technical problems, the present invention provides a medium delivery system, and the technical solution is as follows:

[0004] A medium delivery system includes a driving component and a first flow channel structure. The first flow channel structure has a first flow channel with both ends communicating with the driving component. The first flow channel contains a driving medium and a working medium. The driving medium is located at both ends of the first flow channel, and the working medium is located between the driving media.

[0005] The medium delivery system is further provided with at least one second flow channel communicating with the first flow channel. Both ends of the second flow channel are located between the two ends of the first flow channel. An inlet and an outlet communicating with an external pipeline are provided in the second flow channel. The working medium flows in the external pipeline. The driving component can drive the driving medium to move, so that the working medium in the first flow channel and at least one second flow channel can flow along a first preset direction. The working medium flows from the inlet to the outlet, and the working medium in the first flow channel can flow in a direction opposite to the first preset direction under the action of the driving medium to return to the initial position.

[0006] With such a setting, the driving component does not need to be in direct contact with the working medium, but indirectly drives the working medium through the driving medium. When the working medium is a biological fluid such as blood, the above driving method can avoid the mechanical structure in the driving component from damaging red blood cells. When the working medium is an industrially strongly corrosive fluid, the above driving method can avoid the strongly corrosive fluid from affecting the durability of the structure in the driving component. During the operation of the medium delivery system, the driving component moves first, pushing the driving medium to move along the first preset direction, thereby driving the working medium in the first flow channel and the second flow channel to move along the first preset direction, so that the working medium entering the second flow channel from the inlet flows along the first preset direction to the outlet and flows out from the outlet; when the driving component drives the driving medium in the reverse direction, the driving medium can drive the working medium to flow in the reverse direction, so that the working medium can return to the starting position, thereby enabling the medium delivery system to be recycled.

[0007] In one embodiment, the first flow channel includes a first path, a second path, and a third path connected in sequence. The second flow channel includes a first end and a second end. The first end is connected to one end of the first path close to the second path, and the second end is connected to one end of the third path close to the second path. The included angle α between the axis of the first end and the first path is greater than the included angle β between the second path and the first path, and the included angle γ between the axis of the second end and the third path is less than the included angle δ between the second path and the third path.

[0008] With such a setting, since the included angle α between the axis of the first end and the first path is greater than the included angle β between the second path and the first path, the rotation amount of the working medium flowing from the first path to the second flow channel is less than the rotation amount of the working medium flowing from the first path to the second path. Therefore, the working medium will directly enter the second flow channel without turning to flow into the second path; similarly, when the working medium flows in the reverse direction, the rotation amount of the working medium flowing from the third path to the second flow channel is greater than the rotation amount of the working medium flowing from the third path to the second path. Therefore, the working medium will directly enter the second path without turning to flow into the second flow channel, thereby realizing that when the working medium flows in the reverse direction along the first preset direction, it will not cause the reverse flow of the working medium in the second flow channel.

[0009] In one embodiment, there is one second flow channel, the included angle α and the included angle δ are 180°, and the included angle β and the included angle γ are 90°.

[0010] With such a setting, the axes of the first path and the first end are the same, and the working medium does not need to turn when flowing from the first path to the first end, and the flow is smoother; similarly, the included angle β and the included angle γ being 90° enables the working medium to flow from the third path to the second path without turning, and the flow is smoother.

[0011] In one embodiment, there are multiple second flow channels. There are multiple branch channels provided between the first path and the third path. The two ends of each of the multiple branch channels are respectively connected to the first path and the third path, and at least one of the second flow channels is provided on each of the branch channels.

[0012] With such a setting, inlets and outlets can be opened on each of the multiple second flow channels, thereby increasing the flow rate of the working medium and improving the transportation efficiency.

[0013] In one embodiment, the medium delivery system further has a third flow channel. There are two branch channels provided between the first path and the third path. Each of the branch channels is connected to two of the second flow channels. The two ends of the third flow channel are respectively connected to the two branch channels and are both located between the two second flow channels.

[0014] Defining the one-way flow of the medium in the first flow channel and the second flow channel as one pulse, the third flow channel connects the multiple branch channels, so that during multiple pulses, the output of the medium in the second flow channel is more stable and continuous.

[0015] In one embodiment, both the first path and the third path include a main pipe section and a reduced-diameter pipe section. The reduced-diameter pipe section is connected to one end of the main pipe section away from the second path. The end of the reduced-diameter pipe section away from the main pipe section is connected to the driving assembly, and the diameter of the reduced-diameter pipe section is smaller than that of the main pipe section.

[0016] With such a setting, the diameter of the reduced-diameter pipe section is smaller, which can increase the surface tension of the liquid and improve the stability between the working medium and the driving medium. In other embodiments, according to the amplitude and frequency of the driving assembly and its influence on the stability of the gas-liquid interface, a reduced-diameter pipe section of different materials and sizes can be adaptively selected to improve the stability of the gas-liquid interface under pulsation by changing the surface tension coefficient.

[0017] In one embodiment, the reduced-diameter pipe section includes multiple capillary tubes. The multiple capillary tubes are arranged in parallel and spliced to form the reduced-diameter pipe section; or,

[0018] A perforated plate is provided in the reduced-diameter pipe section. Multiple through holes are opened on the perforated plate, and the two ends of each of the multiple through holes are respectively connected to the main pipe section and the driving assembly.

[0019] With such a setting, both the capillary tubes and the perforated plate can reduce the contact area between the working medium and the driving medium, thereby improving the stability of the gas-liquid interface at the contact of the two media. It should be noted that the gas-liquid interface is not limited to the contact surface between gas and liquid. In the present invention, the gas-liquid interface also refers to the contact surface between liquid and liquid and the contact surface between gas and gas.

[0020] In one embodiment, the driving assembly includes a double-piston cylinder, and the double-piston cylinder can drive the driving medium on either side to move away from the double-piston cylinder.

[0021] With such an arrangement, the double-piston cylinder can drive the working medium in two directions. The double-piston cylinder can better control the movement and is more precise. And since the double-acting cylinder has compressive and tensile forces and does not require an external power source, it is also more energy-efficient.

[0022] In one embodiment, the driving assembly includes a reciprocating piston and an airbag. The reciprocating piston and the airbag are respectively located at both ends of the first flow channel. The reciprocating piston can drive the working medium to move towards the airbag through the driving medium, and the airbag can drive the working medium to move towards the reciprocating piston through the driving medium.

[0023] With such an arrangement, the reciprocating piston can perform axial reciprocating motion, thereby pushing the medium in the first flow channel and the second flow channel towards the airbag. The volume of the airbag can increase as the medium enters to accommodate more medium. When the reciprocating piston returns to the initial position, it can drive the medium in the first flow channel and the second flow channel to move towards the reciprocating piston, and the airbag will also shrink synchronously due to its own elasticity, further pushing the medium to flow back.

[0024] In one embodiment, the second flow channel is arc-shaped.

[0025] With such an arrangement, the flow of the working medium will be smoother and the transition will be smoother. When the working medium is a biological fluid such as blood, cell rupture can also be reduced.

[0026] Compared with the prior art, the driving assembly of the medium delivery system provided by the present invention does not need to be directly in contact with the working medium, but indirectly drives the working medium through the driving medium. When the working medium is a biological fluid such as blood, the above driving method can avoid the mechanical structure in the driving assembly from damaging red blood cells. When the working medium is an industrial strongly corrosive fluid, the above driving method can avoid the strongly corrosive fluid from affecting the durability of the structure in the driving assembly. During the working process of the medium delivery system, the driving assembly first moves, driving the driving medium to move along a first preset direction, thereby driving the working medium in the first flow channel and the second flow channel to move along the first preset direction, so that the working medium entering the second flow channel from the inlet flows along the first preset direction to the outlet and flows out from the outlet; when the driving assembly drives the driving medium in the reverse direction, the driving medium can drive the working medium to flow in the reverse direction, so that the working medium can return to the starting position, thereby enabling the medium delivery system to be recycled. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1Schematic structural diagram of the medium delivery system according to Embodiment 1 provided by the present invention;

[0028] Figure 2 Schematic structural diagram of the medium delivery system according to Embodiment 2 provided by the present invention;

[0029] Figure 3 Schematic structural diagram of the medium delivery system according to Embodiment 3 provided by the present invention;

[0030] Figure 4 Schematic structural diagram of the medium delivery system according to Embodiment 4 provided by the present invention;

[0031] Figure 5 Schematic structural diagram of the medium delivery system according to Embodiment 5 provided by the present invention;

[0032] Figure 6 Schematic structural diagram of the medium delivery system according to Embodiment 6 provided by the present invention;

[0033] Figure 7 Schematic structural diagram of the medium delivery system according to Embodiment 7 provided by the present invention;

[0034] Figure 8 Schematic structural diagram of the medium delivery system according to Embodiment 8 provided by the present invention.

[0035] The meanings of the symbols in the figure are as follows:

[0036] 100, medium delivery system; 10, first flow channel; 11, main pipe section; 12, reduced pipe section; 121, capillary; 122, porous plate; 123, through hole; 13, first path; 14, second path; 15, third path; 18, branch; 20, second flow channel; 21, inlet; 22, outlet; 23, first end; 24, second end; 30, drive assembly; 31, reciprocating piston; 32, airbag; 33, double piston cylinder; 40, drive medium; 50, working medium; 60, third flow channel; 70, medium storage tank. Detailed implementation manners

[0037] To make the above objects, features, and advantages of the present application more obvious and understandable, the following describes the detailed implementation manners of the present application in conjunction with the accompanying drawings. Many specific details are set forth in the following description to facilitate a thorough understanding of the present application. However, the present application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without departing from the connotation of the present application. Therefore, the present application is not limited by the specific embodiments disclosed below.

[0038] It should be noted that when a component is referred to as "fixed to" or "disposed on" another component, it can be directly on the other component or there can also be an intermediate component. When a component is considered to be "connected" to another component, it can be directly connected to the other component or there may be an intermediate component at the same time. The terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used in the description of the present application are only for the purpose of illustration and do not represent the only implementation manner.

[0039] In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present application, the meaning of "a plurality" is at least two, such as two, three, etc., unless otherwise specifically defined.

[0040] In the present application, unless otherwise clearly defined and limited, the first feature may be in direct contact with the second feature on the "upper" or "lower" of the second feature, or the first feature and the second feature may be in indirect contact through an intermediate medium. Moreover, the first feature being "above", "over" and "on" the second feature may be that the first feature is directly above or obliquely above the second feature, or only indicates that the horizontal height of the first feature is higher than that of the second feature. The first feature being "under", "beneath" and "underneath" the second feature may be that the first feature is directly below or obliquely below the second feature, or only indicates that the horizontal height of the first feature is less than that of the second feature.

[0041] Unless otherwise defined, all technical and scientific terms used in the description of the present application have the same meaning as commonly understood by those skilled in the technical field to which the present application belongs. The terms used in the description of the present application are only for the purpose of describing specific implementation manners and are not intended to limit the present application. The term "and / or" used in the description of the present application includes any and all combinations of one or more of the related listed items.

[0042] Please refer to Figure 1-3 , the present invention provides a medium delivery system 100, which is applied to microfluidic technology and is used for transporting media such as biological fluids and industrial strongly corrosive fluids that are not suitable for mechanical contact transportation.

[0043] The medium delivery system 100 includes a driving component 30 and a first flow channel structure. The first flow channel structure has a first flow channel 10 with both ends communicating with the driving component 30. There is a driving medium 40 and a working medium 50 in the first flow channel 10. There is a driving medium 40 at both ends of the first flow channel 10, and the working medium 50 is located between the driving media 40.

[0044] With such a setting, the driving component 30 does not need to directly contact the working medium 50, but indirectly drives the working medium 50 through the driving medium 40. When the working medium 50 is a biological fluid such as blood, the above driving method can avoid the mechanical structure in the driving component 30 from damaging red blood cells. When the working medium 50 is an industrially strongly corrosive fluid, the above driving method can avoid the strongly corrosive fluid from affecting the durability of the structure in the driving component 30.

[0045] The medium delivery system 100 is further provided with at least one second flow channel 20 communicating with the first flow channel 10. Both ends of the second flow channel 20 are located between the two ends of the first flow channel 10. An inlet 21 and an outlet 22 communicating with an external pipeline are provided in the second flow channel 20. A working medium 50 flows in the external pipeline. The driving component 30 can drive the driving medium 40 to move, so that the working medium 50 in the first flow channel 10 and at least one second flow channel 20 can flow along a first preset direction. The working medium 50 flows from the inlet 21 to the outlet 22, and under the action of the working medium 50 in the first flow channel 10, it flows in a direction opposite to the first preset direction to return to the initial position.

[0046] During the working process of the medium delivery system 100, the driving component 30 first moves, pushing the driving medium 40 to move along the first preset direction, thereby driving the working medium 50 in the first flow channel 10 and the second flow channel 20 to move along the first preset direction, so that the working medium 50 entering the second flow channel 20 from the inlet 21 flows along the first preset direction to the outlet 22 and flows out from the outlet 22; when the driving component 30 reversely drives the driving medium 40, the driving medium 40 can drive the working medium 50 to flow reversely, so that the working medium 50 can return to the starting position, thereby enabling the medium delivery system 100 to be recycled.

[0047] It should be explained that in this embodiment, the first preset direction is the direction from the inlet 21 to the outlet 22. Please refer to Figure 1 , in the first embodiment, the first preset direction is the direction pointed by the arrow in the second flow channel 20.

[0048] Preferably, the second flow channel 20 is arc-shaped, so that the flow of the working medium 50 is smoother and the transition is smoother. When the working medium 50 is a biological fluid such as blood, cell rupture can also be reduced.

[0049] Please refer to Figure 1, the first flow channel 10 includes a first path 13, a second path 14, and a third path 15 that are connected in sequence. The second flow channel 20 includes a first end 23 and a second end 24. The first end 23 is connected to one end of the first path 13 close to the second path 14, and the second end 24 is connected to one end of the third path 15 close to the second path 14. The included angle α between the axis of the first end 23 and the first path 13 is greater than the included angle β between the second path 14 and the first path 13, and the included angle γ between the axis of the second end 24 and the third path 15 is less than the included angle δ between the second path 14 and the third path 15.

[0050] Since the included angle α between the axis of the first end 23 and the first path 13 is greater than the included angle β between the second path 14 and the first path 13, when the working medium 50 flows from the first path 13 to the second flow channel 20, the rotational amount is less than the rotational amount when the working medium 50 flows from the first path 13 to the second path 14. Therefore, the working medium 50 will directly enter the second flow channel 20 instead of turning to flow into the second path 14. Similarly, when the working medium 50 flows in the reverse direction, the rotational amount from the third path 15 to the second flow channel 20 is greater than the rotational amount when the working medium 50 flows from the third path 15 to the second path 14. Therefore, the working medium 50 will directly enter the second path 14 instead of turning to flow into the second flow channel 20, thereby achieving that when the working medium 50 flows in the reverse direction along the first preset direction, the reverse flow of the working medium 50 in the second flow channel 20 will not occur.

[0051] Preferably, there is one second flow channel 20, the included angle α and the included angle δ are 180°, and the included angle β and the included angle γ are 90°. With such a setting, the axes of the first path 13 and the first end 23 are the same, and the working medium 50 does not need to turn when flowing from the first path 13 to the first end 23, and the flow is smoother. Similarly, the included angle β and the included angle γ being 90° enables the working medium 50 to flow from the third path 15 to the second path 14 without turning, and the flow is smoother.

[0052] In other embodiments, the included angle α and the included angle δ can also be 170°, and the corresponding included angles β and γ are less than 170°; the included angle α and the included angle δ can also be 160°, then the corresponding included angles β and γ are less than 160°. The angles of the included angle α and the included angle δ are not limited to 180°, 170°, and 160° described in the present invention. As long as the angles of the included angle α and the included angle δ are greater than the angles of the included angle β and the included angle γ, it is ensured that the flow direction of the working medium 50 will not deviate.

[0053] Understandably, the angles of the included angle α and the included angle δ can be set to be different, and the angles of the included angle β and the included angle γ are also different. It only needs to satisfy that the included angle β is less than the included angle α, and the angle of the included angle δ is greater than the included angle γ. For example, the included angle α is 150°, the included angle β is 110°, the included angle γ is 90°, and the included angle δ is 130°, etc. The above four included angles are only one of the implementation manners, and only need to satisfy the above angle setting rules. The setting of the four included angles is not limited to the above angles.

[0054] Both the first path 13 and the third path 15 include a main pipe section 11 and a reduced pipe section 12. The reduced pipe section 12 is connected to one end of the main pipe section 11 away from the second path 14. One end of the reduced pipe section 12 away from the main pipe section 11 is connected to the driving assembly 30. The diameter of the reduced pipe section 12 is smaller than that of the main pipe section 11. Since the diameter of the reduced pipe section 12 is smaller, the surface tension of the liquid can be increased, and the stability between the working medium 50 and the driving medium 40 can be improved. In other embodiments, according to the amplitude and frequency of the driving assembly 30 and its influence on the stability of the gas-liquid interface, the reduced pipe section 12 with different materials and sizes can be adaptively selected, and the stability of the gas-liquid interface under pulsation can be improved by changing the surface tension coefficient.

[0055] Specifically, please refer to Figure 3 , in the third embodiment, the reduced pipe section 12 includes a plurality of capillary tubes 121. The plurality of capillary tubes 121 are arranged in parallel and spliced to form the reduced pipe section 12.

[0056] Please refer to Figure 4 , in the fourth embodiment, a porous plate 122 is provided in the reduced pipe section 12. A plurality of through holes 123 are opened on the porous plate 122. Both ends of the plurality of through holes 123 are respectively communicated with the main pipe section 11 and the driving assembly 30.

[0057] Both the capillary tube 121 and the porous plate 122 can reduce the contact area between the working medium 50 and the driving medium 40, thereby improving the stability of the gas-liquid interface at the contact of the two media. It should be explained that the gas-liquid interface is not limited to the contact surface between gas and liquid. In the present invention, the gas-liquid interface also refers to the contact surface between liquid and liquid and the contact surface between gas and gas.

[0058] In other embodiments, the capillary tube 121 and the porous plate 122 may not be provided in the reduced pipe section 12, so as to reduce the processing cost and process difficulty. The reduced pipe section 12 with a smaller diameter can also improve the stability of the gas-liquid interface, and the capillary tube 121 and the porous plate 122 are not necessarily required.

[0059] Please refer to Figure 1, in the first embodiment, the driving assembly 30 includes a double piston cylinder 33, and the double piston cylinder 33 can drive the driving medium 40 on either side to move away from the double piston cylinder 33. By doing so, the driving of the working medium 50 in two directions can be achieved at one time. The double piston cylinder 33 can better control the movement and is more precise. And because the double piston cylinder 33 has compressive and tensile forces and does not require an external power source, it is also more energy-efficient.

[0060] Please refer to Figure 2 , in the second embodiment, the driving assembly 30 includes a reciprocating piston 31 and an airbag 32. The reciprocating piston 31 and the airbag 32 are respectively located at both ends of the first flow channel 10. The reciprocating piston 31 can drive the working medium 50 to move towards the airbag 32 through the driving medium 40, and the airbag 32 can drive the working medium 50 to move towards the reciprocating piston 31 through the driving medium 40.

[0061] The reciprocating piston 31 can perform axial reciprocating motion, thereby pushing the media in the first flow channel 10 and the second flow channel 20 towards the airbag 32. The volume of the airbag 32 can increase as the medium enters to accommodate more media. When the reciprocating piston 31 returns to the initial position, it can drive the media in the first flow channel 10 and the second flow channel 20 to move towards the reciprocating piston 31, and the airbag 32 will also shrink synchronously due to its own elasticity, further pushing the media to flow back.

[0062] The positions of the reciprocating piston 31 and the airbag 32 can be swapped. The reciprocating piston 31 can also be replaced by a unidirectional cylinder, and the airbag 32 can also be replaced by other elastic containers, and it is not limited to the above solutions.

[0063] In addition to the solutions of the above-mentioned first to fourth embodiments, the present invention also provides many other embodiments.

[0064] Embodiment Five

[0065] Please refer to Figure 5 , the driving assembly 30 in the fifth embodiment is the same as that in the first to fourth embodiments and will not be elaborated here. The difference is that the first flow channel 10 in this embodiment includes a first path 13 and a third path 15. The ends of the first path 13 and the third path 15 that are away from each other are both connected to the driving assembly 30. There are two branch paths 18 between the first path 13 and the third path 15. The two ends of the 2 branch paths 18 are respectively connected to the first path 13 and the third path 15, and a second flow channel 20 is provided on each of the two branch paths 18.

[0066] Specifically, please refer to Figure 5, taking the driving modes of the airbag 32 and the reciprocating piston 31 as an example, in this embodiment, the first end 23 of the second flow channel 20 is the end close to the airbag 32, and the second end 24 of the second flow channel 20 is the end close to the reciprocating piston 31. Both of the two second flow channels 20 have a first end 23 and a second end 24. The first end 23 is provided with an inlet 21 communicating with the outside, and the second end 24 is provided with an outlet 22 communicating with the outside.

[0067] When the reciprocating piston 31 moves in a direction away from the first flow channel 10, and at the same time the airbag 32 contracts, the driving medium 40 close to the airbag 32 will move in a direction away from the airbag 32, thereby driving the original working medium 50 in the second flow channel 20 to move in the direction of the reciprocating piston 31. At this time, the external working medium 50 will also enter the second flow channel 20 from the inlet 21 and follow the flow direction of the original working medium 50 to flow to the outlet 22, realizing the transportation of the working medium 50. In this embodiment, there are two second flow channels 20, so there are two inlets 21 and two outlets 22, increasing the transportation volume of the working medium 50. With the increase in the number of the second flow channels 20, the output of the working medium 50 will become more continuous and stable.

[0068] Embodiment Six

[0069] Please refer to Figure 6 , the driving component 30 of Embodiment Six is the same as that of Embodiments One to Five, which will not be elaborated here. The difference is that two second flow channels 20 are respectively arranged on the two branches 18 of Embodiment Six.

[0070] Specifically, please refer to Figure 6 , the two second flow channels 20 on each branch 18 are both provided with an inlet 21 and an outlet 22, that is, a total of four inlets 21 and four outlets 22 are provided in this embodiment, and the four inlets 21 and the four outlets 22 are all communicated with the outside. The two second flow channels 20 on one branch 18 are arranged in series, and the two branches 18 are arranged in parallel without affecting each other.

[0071] Preferably, the two second flow channels 20 on one branch 18 are arranged in a mirror image, that is, along the flow direction of the working medium 50, the distribution order of the inlet 21 and the outlet 22 is: inlet 21, outlet 22, outlet 22 and inlet 21 or outlet 22, inlet 21, inlet 21 and outlet 22. Thus, when the working medium 50 flows along the preset direction, one of the second flow channels 20 on each of the two branches 18 plays a role in transporting the working medium 50. When the working medium 50 flows in the reverse direction, one of the second flow channels 20 on each of the two branches 18 also plays a role in transporting the working medium 50, making the medium transportation system 100 more stable and continuous in transporting the medium.

[0072] In this embodiment, the medium delivery system 100 is further provided with a third flow channel 60. The two ends of the third flow channel 60 are respectively communicated with two branches 18, and both are located between two second flow channels 20. Defining the one-way flow of the medium in the first flow channel 10 and the second flow channel 20 as a primary pulse, the third flow channel 60 connects multiple branches 18, so that during multiple pulses, the output of the medium in the second flow channel 20 is more stable and continuous.

[0073] Embodiment Seven

[0074] Please refer to Figure 7 , the structure of Embodiment Seven is substantially the same as that of Embodiment Six. The difference is that the medium delivery system 100 in Embodiment Seven includes a medium storage tank 70. The third flow channel 60 in Embodiment Seven is communicated with the medium storage tank 70. The medium storage tank 70 can provide a sufficient amount of working medium 50 to the third flow channel 60. When there is a gap during the process of the medium delivery system 100 delivering the medium in multiple pulses, the third flow channel 60 can timely fill the gap, making the output of the medium by the medium delivery system 100 more stable and continuous.

[0075] Embodiment Eight

[0076] Please refer to Figure 8 , the structure of Embodiment Eight is substantially the same as that of Embodiment Six. The difference is that Embodiment Eight is provided with eight second flow channels 20 on each branch 18, thereby further increasing the medium delivery volume.

[0077] It can be understood that the number of the second flow channels 20 on each branch 18 can be adaptively modified according to the medium delivery flow rate requirement. For example, 1, 2, 3, 4, 5, 6, 7, 8 second flow channels 20 are set, etc., and are not limited to 1, 2 or 8 listed in the present invention.

[0078] Compared with the prior art, the driving component 30 of the medium conveying system 100 provided by the present invention does not need to be in direct contact with the working medium 50, but indirectly drives the working medium 50 through the driving medium 40. When the working medium 50 is a biological fluid such as blood, the above driving method can avoid the mechanical structure in the driving component 30 from damaging red blood cells. When the working medium 50 is an industrial strongly corrosive fluid, the above driving method can avoid the strongly corrosive fluid from affecting the durability of the structure in the driving component 30. During the working process of the medium conveying system 100, the driving component 30 first moves, pushing the driving medium 40 to move along the first preset direction, thereby driving the working medium 50 in both the first flow channel 10 and the second flow channel 20 to move along the first preset direction, so that the working medium 50 entering the second flow channel 20 from the inlet 21 flows along the first preset direction to the outlet 22 and flows out from the outlet 22; when the driving component 30 drives the driving medium 40 in the reverse direction, the driving medium 40 can drive the working medium 50 to flow in the reverse direction, so that the working medium 50 can return to the starting position, thereby enabling the medium conveying system 100 to be recycled.

[0079] The technical features of the above-described embodiments can be combined arbitrarily. For the sake of brevity of description, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, it should be considered as the scope described in this specification.

[0080] The above-described embodiments only represent several implementation manners of the present invention, and their descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of the invention patent. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present invention, several modifications and improvements can still be made, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the invention patent should be subject to the appended claims.

Claims

1. A medium delivery system, characterized in that, It includes a driving component (30) and a first flow channel structure. A first flow channel (10) with both ends communicating with the driving component (30) is provided in the first flow channel structure. A driving medium (40) and a working medium (50) are provided in the first flow channel (10). The driving medium (40) is provided at both ends of the first flow channel (10), and the working medium (50) is located between the driving media (40). The medium conveying system is further provided with at least one second flow channel (20) communicating with the first flow channel (10). Both ends of the second flow channel (20) are located between the two ends of the first flow channel (10). An inlet (21) and an outlet (22) communicating with an external pipeline are provided in the second flow channel (20). The working medium (50) flows in the external pipeline. The driving component (30) can drive the driving medium (40) to move so that the working medium (50) in the first flow channel (10) and at least one second flow channel (20) can flow along a first preset direction. The working medium (50) flows from the inlet (21) to the outlet (22), and the working medium (50) in the first flow channel (10) can flow in a direction opposite to the first preset direction under the action of the driving medium (40). Wherein, the first flow channel (10) includes a first path (13), a second path (14) and a third path (15) connected in sequence. The second flow channel (20) includes a first end (23) and a second end (24). The first end (23) is connected to one end of the first path (13) close to the second path (14), and the second end (24) is connected to one end of the third path (15) close to the second path (14). The angle α between the axis of the first end (23) and the first path (13) is greater than the angle β between the second path (14) and the first path (13), and the angle γ between the axis of the second end (24) and the third path (15) is less than the angle δ between the second path (14) and the third path (15). The second flow channel (20) is arc-shaped.

2. The medium delivery system according to claim 1, wherein There is one second flow channel (20), the angle α and the angle δ are 180°, and the angle β and the angle γ are 90°.

3. The medium conveying system according to claim 1, wherein Both the first path (13) and the third path (15) include a main pipe section (11) and a reduced pipe section (12). The reduced pipe section (12) is connected to one end of the main pipe section (11) far from the second path (14). One end of the reduced pipe section (12) far from the main pipe section (11) is connected to the driving component (30). The diameter of the reduced pipe section (12) is smaller than that of the main pipe section (11).

4. The media delivery system according to claim 3, wherein The reduced pipe section (12) includes a plurality of capillary tubes (121). The plurality of capillary tubes (121) are arranged in parallel and spliced to form the reduced pipe section (12); or, A perforated plate (122) is provided in the pipe reducing section (12), and a plurality of through holes (123) are formed in the perforated plate (122). Both ends of the plurality of through holes (123) communicate with the main pipe section (11) and the driving assembly (30) respectively.

5. The medium conveying system according to claim 1, characterized in that, The driving assembly (30) includes a double piston cylinder (33), and the double piston cylinder (33) can drive the driving medium (40) on either side to move away from the double piston cylinder (33).

6. The medium delivery system according to claim 1, wherein The driving assembly (30) includes a reciprocating piston (31) and an airbag (32). The reciprocating piston (31) and the airbag (32) are respectively located at both ends of the first flow channel (10). The reciprocating piston (31) can drive the working medium (50) to move towards the airbag (32) through the driving medium (40), and the airbag (32) can drive the working medium (50) to move towards the reciprocating piston (31) through the driving medium (40).

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