A pressure monitoring device, power source system, and drug infusion system

Abstract

This application provides a pressure monitoring device, a power source system, and a drug delivery system. The pressure monitoring device includes: an elastic membrane covering a fluid channel; a conductive layer located on the surface of the elastic membrane away from the fluid channel or spaced apart from the surface of the elastic membrane away from the fluid channel; the conductive layer is an integral structure or includes multiple non-contact first conductors; and a detection device connected at least to the conductive layer. In this application's pressure monitoring device, by setting an elastic membrane on the fluid channel and a conductive layer on the surface of the elastic membrane, the overall pressure monitoring device has a relatively simple structure and small size, making it suitable for various application scenarios.

Description

Technical Field

[0001] This application relates to the field of pressure monitoring technology, and in particular to pressure monitoring devices, power source systems and drug delivery systems. Background Technology

[0002] Pressure monitoring is a crucial technology in fluid supply systems. It allows for real-time monitoring of system pressure to ensure it remains within acceptable limits and promptly alerts engineers to any anomalies, preventing damage to the system. However, current pressure monitoring devices are generally complex in structure and large in size, which limits their application. Summary of the Invention

[0003] Therefore, it is necessary to address the above-mentioned problems by providing a pressure monitoring device, a power source system, and a drug delivery system.

[0004] In a first aspect, this application provides a pressure monitoring device, which is disposed on a fluid channel, and the pressure monitoring device includes:

[0005] An elastic membrane covers the fluid channel;

[0006] A conductive layer is located on the surface of the elastic membrane away from the fluid channel or is spaced apart from the surface of the elastic membrane away from the fluid channel; the conductive layer is an integral structure or comprises multiple non-contacting first conductors;

[0007] The detection device is at least connected to the conductive layer.

[0008] In the pressure monitoring device of this application, an elastic membrane is set on the fluid channel and a conductive layer is set on the surface of the elastic membrane. The entire pressure monitoring device has a relatively simple structure and small size, and can be applied to various application scenarios.

[0009] In one embodiment, the detection device includes a resistance detection device.

[0010] In one embodiment, the conductive layer is an integral structure, and the pressure monitoring device further includes:

[0011] A conductive line is located on the side of the conductive layer away from the elastic membrane and is spaced apart from the conductive layer; the conductive line includes a plurality of non-contacting second conductors;

[0012] The elastic membrane deforms under the pressure of the fluid in the fluid channel, and when the pressure in the fluid channel is greater than or equal to a threshold pressure, the conductive layer comes into contact with the conductive circuit.

[0013] The detection device is also connected to the conductive line.

[0014] In one embodiment, the fluid channel is located within the main structure; the pressure monitoring device further includes:

[0015] An aperture is located within the main structure and on the side of the elastic membrane away from the fluid channel; the aperture covers the elastic membrane; there are multiple apertures, each with a different area; each aperture contains the conductive layer and the conductor circuit.

[0016] In one embodiment, the conductive layer includes a plurality of non-contacting first conductors; the pressure monitoring device further includes:

[0017] The conductive line is located on the side of the conductive layer away from the elastic membrane and is spaced apart from the conductive layer; the conductive line is an integral structure.

[0018] The elastic membrane deforms under the pressure of the fluid in the fluid channel, and when the pressure in the fluid channel is greater than or equal to a threshold pressure, the conductive layer comes into contact with the conductive circuit.

[0019] The detection device is also in contact with the conductive line.

[0020] In one embodiment, the fluid channel is located within the main structure; the pressure monitoring device further includes:

[0021] An aperture is located within the main structure and on the side of the elastic membrane away from the fluid channel; the aperture covers the elastic membrane; there are multiple apertures, each with a different area; each aperture contains the conductive layer and the conductor circuit.

[0022] The pressure at which the elastic membrane bulges under fluid pressure at different holes is related to the hole diameter. The larger the hole diameter, the lower the pressure required for the elastic membrane to bulge. In the above embodiment, multiple holes with different diameters are provided. By detecting the connectivity between the conductive layer and the conductor line at each hole, the different pressure conditions of the fluid in the fluid channel can be detected and judged.

[0023] Secondly, this application also provides a power source system, the power source system comprising:

[0024] A power source, used to provide the driving fluid;

[0025] The first channel is connected to the power source;

[0026] The pressure monitoring device as described in the first aspect is installed on the first channel.

[0027] Thirdly, this application also provides a drug delivery system, the drug delivery system comprising: a drug reservoir having a drug storage chamber, a drug outlet at one end of the drug reservoir, and an inlet at the other end of the drug reservoir;

[0028] The piston is located inside the drug reservoir;

[0029] The power source system as described in the second aspect; the end of the first channel away from the power source is connected to the inlet.

[0030] The drug injection system of this application allows for multiple infusions after a single injection, simplifying the treatment process.

[0031] In one embodiment, the drug injection system further includes:

[0032] A membrane pump includes a metering tank and an elastic membrane layer; the elastic membrane layer covers the metering tank.

[0033] The second channel is connected at one end to the drug outlet and at the other end to the membrane pump, and extends above the elastic membrane layer.

[0034] The third channel is connected at one end to the membrane pump and extends above the elastic membrane layer;

[0035] The first switching valve is located on the second channel;

[0036] The second switching valve is located on the third channel;

[0037] The fourth channel is connected at one end to the power source and at the other end to the metering pool;

[0038] The fifth channel is connected at one end to the quantitative pool.

[0039] In one embodiment, the drug delivery system further includes:

[0040] The third switching valve is located on the fourth channel;

[0041] The fourth switching valve is located on the fifth channel;

[0042] The fifth switching valve is located on the first channel.

[0043] In one embodiment, the drug injection system further includes:

[0044] An air extraction device is connected to the end of the fifth channel furthest from the metering pool.

[0045] In one embodiment, the drug injection system further includes:

[0046] A control device, connected to both the detection device and the power source, is used to control the power source to stop supplying the driving fluid to the drug reservoir via the first channel and the inlet when the detection device detects an abnormality. Attached Figure Description

[0047] Figures 1 to 5 The diagram shown is a cross-sectional structural schematic of the pressure monitoring device provided in different embodiments of this application.

[0048] Figure 6 The diagram shown is a structural schematic of a power source system provided in another embodiment of this application.

[0049] Figure 7 The diagram shown is a schematic representation of a drug infusion system provided in another embodiment of this application.

[0050] Figure 8 The diagram shown is a structural schematic of a drug injection system provided in another embodiment of this application.

[0051] Component labeling: 10. Pressure monitoring device; 101. Elastic membrane; 102. Conductive layer; 1021. Deformation part; 1022. First conductor; 11. Fluid channel; 12. Printed circuit board; 121. Conductor line; 1211. Second conductor; 13. Main structure; 131. Hole; 1311. First hole; 1312. Second hole; 14. Fluid inlet; 15. Fluid outlet; 20. Power source; 21. First channel; 22. Drug reservoir; 23. Piston; 24. Membrane pump; 25. Second channel; 26. Third channel; 27. First switching valve; 28. Second switching valve; 29. ​​Fourth channel; 30. Fifth channel; 31. Third switching valve; 32. Fourth switching valve; 33. Air extraction device; 34. Control device. Detailed Implementation

[0052] The following specific embodiments illustrate the implementation of this application. Those skilled in the art can easily understand other advantages and effects of this application from the content disclosed in this specification.

[0053] It should be understood that the structures, proportions, sizes, etc., depicted in the accompanying drawings of this specification are merely for illustrative purposes to aid those skilled in the art and are not intended to limit the scope of this application. Therefore, they have no substantial technical significance. Any modifications to the structure, changes in proportions, or adjustments to size, without affecting the effectiveness and purpose of this application, should still fall within the scope of the technical content disclosed in this application. Furthermore, the terms such as "upper," "lower," "left," "right," "middle," and "one" used in this specification are merely for clarity and are not intended to limit the scope of this application. Changes or adjustments to their relative relationships, without substantially altering the technical content, should also be considered within the scope of this application's implementation.

[0054] In one embodiment, see Figures 1 to 5 This application provides a pressure monitoring device disposed on a fluid channel 11. The pressure monitoring device may include: an elastic membrane 101 covering the fluid channel 11; and a conductive layer 102 located on the surface of the elastic membrane 101 away from the fluid channel 11 or having a gap with the surface of the elastic membrane 101. The conductive layer 102 may be an integral structure (e.g., Figures 1 to 3 As shown), it may also include multiple non-contacting first conductors 1022 (such as... Figure 4 and Figure 5 (as shown); a detection device (not shown), which is at least connected to the conductive layer 102.

[0055] In the pressure monitoring device of this application, by setting an elastic membrane 101 on the fluid channel 11 and setting a conductive layer 102 on the surface of the elastic membrane 101, the entire pressure monitoring device has a relatively simple structure and small size, and can be applied to various application scenarios.

[0056] In one example, please continue to participate. Figure 1 and Figure 2 The detection device may include a resistance detection device.

[0057] In this example, when the fluid in the fluid channel 11 applies pressure to the elastic membrane 101, the elastic membrane 101 will bulge upward under the pressure, and the conductive layer 102 will also deform along with the elastic membrane 101 to form a deformed portion 1021; during the deformation of the conductive layer 102, the resistance of the conductive layer 102 will change with the deformation; at this time, by detecting the resistance value of the conductive layer 102 by the detection device, the deformation of the conductive layer 102 under the pressure can be determined, and thus the pressure in the fluid channel 11 can be determined.

[0058] As an example, please continue to participate. Figure 2 The fluid channel 11 can be located within the main structure 13. The main structure 13 has a hole 131. When the elastic membrane 101 receives the fluid pressure in the fluid channel 11, the elastic membrane 101 and the conductive layer 102 protrude into the hole 131, that is, the deformation part 1021 is located in the hole 131.

[0059] Specifically, the conductive layer 102 may cover the surface of the elastic membrane 101 away from the fluid channel 11, or it may only cover the surface corresponding to the hole 131.

[0060] In another embodiment, please refer to Figure 2 The pressure monitoring device may further include: a printed circuit board 12 located on the side of the conductive layer 102 away from the elastic membrane 101; a conductor line 121 is provided on the surface of the printed circuit board 12 facing the conductive layer 102, the conductor line 121 being spaced from the conductive layer 102; the elastic membrane 101 deforms under the pressure of the fluid in the fluid channel 11, and when the pressure in the fluid channel 11 is greater than or equal to a threshold pressure, the conductive layer 102 comes into contact with the conductor line 121; the detection device is also connected to the conductor line 121; the detection device may include a current detection device. In this embodiment, by using a printed circuit board 12 with conductor lines 121, the size of the pressure monitoring device can be reduced.

[0061] In another embodiment, please continue to refer to Figure 2 The fluid channel 11 is located within the main structure 13. The pressure monitoring device may further include: an orifice 131 located within the main structure 13 and on one side of the fluid channel 11; an elastic membrane 101 covering the orifice; a conductive layer 102 located within the orifice 131; a printed circuit board 12 located on the surface of the main structure 13 where the orifice is located; a conductor line 121 is provided on the surface of the printed circuit board 12 that contacts the main structure 13, the conductor line 121 being located within the orifice 131 and spaced from the conductive layer 102; the elastic membrane 101 deforms under the pressure of the fluid within the fluid channel 11, and when the pressure within the fluid channel 11 is greater than or equal to a threshold pressure, the conductive layer 102 contacts the conductor line 121; the detection device is also connected to the conductor line 121; the detection device includes a current detection device.

[0062] For example, please refer to Figure 3The conductive layer 102 is an integral structure. The pressure monitoring device further includes a conductor line 121, which is located on the side of the conductive layer 102 away from the elastic membrane 1011 and has a gap with the conductive layer 102. The conductive line 121 may include a plurality of non-contact second conductors 1211. The elastic membrane 101 deforms under the pressure of the fluid in the fluid channel, and when the pressure in the fluid channel is greater than or equal to a threshold pressure, the conductive layer 102 comes into contact with the conductive line 121. The detection device 10 is also connected to the conductive line 121.

[0063] Specifically, the conductive line 121 may be located on the surface of the printed circuit board 12. Figure 3 The example given is that the conductive line 121 includes two second conductors 1211; in actual examples, the specific number of second conductors 1211 included in the conductive line 121 can be set according to actual needs, and is not limited to... Figure 3 Only two of them are allowed.

[0064] As an example, the fluid channel 11 may be located within the main structure; the pressure monitoring device may further include: a hole located within the main structure and on the side of the elastic membrane 101 away from the fluid channel; the hole covers the elastic membrane 101; there are multiple holes, and the area of ​​each hole is different; each hole has the conductive layer 102 and the conductor line 121.

[0065] In another embodiment, please continue to refer to Figure 4 The conductive layer 102 includes a plurality of non-contacting first conductors 1022; the pressure monitoring device further includes: a conductor line 121, the conductor line 121 being located on the side of the conductive layer 102 away from the elastic membrane 101 and having a gap with the conductive layer 102; the conductor line 121 is an integral structure; the elastic membrane 101 deforms under the pressure of the fluid in the fluid channel, and when the pressure in the fluid channel is greater than or equal to a threshold pressure, the conductive layer 102 comes into contact with the conductor line 121; the detection device 10 also comes into contact with the conductor line 121.

[0066] For example, please refer to Figure 5 The fluid channel may be located within the main structure 13; the pressure monitoring device further includes: a hole, the hole being located within the main structure 13 and on the side of the elastic membrane 101 away from the fluid channel 11; the hole covering the elastic membrane 101; the number of holes is multiple, and the area of ​​each hole is different; each hole has the conductive layer 102 and the conductor line 121.

[0067] The pressure at which the elastic membrane bulges under fluid pressure at different holes is related to the hole diameter. The larger the hole diameter, the lower the pressure required for the elastic membrane 101 to bulge. In the above embodiment, multiple holes with different diameters are provided. By detecting the connection between the conductive layer 102 and the conductor line 121 at each hole, the different pressure conditions of the fluid in the fluid channel can be detected and judged.

[0068] As an example, please continue reading Figure 5 , Figure 5 The vias include a first via 1311 and a second via 1312, wherein the diameter of the first via 1311 is smaller than the diameter of the second via 1312. The pressure at which the elastic membrane 101 bulges under fluid pressure at different vias is related to the via diameter; the larger the via diameter, the lower the pressure required for the elastic membrane 101 to bulge. In the above embodiment, by providing multiple vias with different diameters, the different pressure conditions of the fluid within the fluid channel can be detected and determined by detecting the connectivity between the conductive layer and the conductor line at each via.

[0069] Specifically, with Figure 5 For example, when the conductive layer 102 at the first hole 1311 is connected to the conductor line 121, the pressure required to be applied to the elastic membrane 101 is a first threshold pressure; when the conductive layer 102 at the second hole 1312 is connected to the conductor line 121, the pressure required to be applied to the elastic membrane 101 is a second threshold pressure, and the second threshold pressure is less than the first threshold pressure; when the detection device detects that the conductive layer 102 at both the first hole 1311 and the second hole 1312 is not connected to the conductor line 121, it can be determined that the pressure in the fluid channel 11 at this time is... The pressure is less than the second threshold pressure; if the detection device detects that the conductive layer 102 at the second hole 1312 is connected to the conductor line 121, but the conductive layer 102 at the first hole 1311 is not connected to the conductor line 121, then it can be determined that the pressure in the fluid channel 11 is greater than or equal to the second threshold pressure and less than the first threshold pressure; if the detection device detects that the conductive layer 102 at both the first hole 1311 and the second hole 1312 is connected to the conductor line 121, then it can be determined that the pressure in the fluid channel 11 is greater than or equal to the first threshold pressure.

[0070] As an example, please continue reading Figure 5The main structure 13 may further include: a fluid inlet 14, which is located within the main structure 13 and is connected to the fluid channel 11; and a fluid outlet 15, which is located within the main structure 13 and is connected to the fluid channel 11.

[0071] In another embodiment, please refer to Figures 1 to 5 See Figure 6 This application also provides a power source system, which may include: a power source 20 for providing driving fluid; a first channel 21 connected to the power source 20; as shown below. Figures 1 to 6 The pressure monitoring device 10 described in the corresponding embodiment is disposed on the first channel 21.

[0072] As an example, the first channel 21 in this embodiment can be as shown in Figure 1. Figure 5 Fluid channel 11 in the middle.

[0073] As an example, the power source 20 may include a gas source, such as a gas generating device; of course, in other examples, the power source 20 may also include a liquid source.

[0074] In yet another embodiment, please refer to Figures 1 to 6 See Figure 7 This application also provides a drug infusion system, which may include: a drug reservoir 22 having a drug storage chamber (not shown), a drug outlet (not shown) at one end of the drug reservoir 22, and an inlet (not shown) at the other end of the drug reservoir 22; a piston 23 located within the drug reservoir 22; as shown Figure 7 The power source system described in the corresponding embodiment; the end of the first channel 21 away from the power source 20 is connected to the inlet.

[0075] The drug injection system of this application allows for multiple infusions after a single injection, greatly simplifying the treatment process.

[0076] In one example, please continue reading Figure 7The drug injection system may further include: a membrane pump 24, the membrane pump 24 including a metering chamber (not shown) and an elastic membrane layer (not shown); the elastic membrane layer covering the metering chamber; a second channel 25, one end of the second channel 25 connected to the drug outlet, the other end connected to the membrane pump 24, and extending above the elastic membrane; a third channel 26, one end of the third channel 26 connected to the membrane pump 24, and extending above the elastic membrane; a first switching valve 27, the first switching valve 27 located on the second channel 25; a second The system includes: a second switch valve 28 located on the third channel 26; a fourth channel 29 connected at one end to the power source 20 and at the other end to the metering tank 24; a fifth channel 30 connected at one end to the metering tank 24; a third switch valve 31 located on the fourth channel 29; a fourth switch valve 32 located on the fifth channel 30; and a fifth switch valve (not shown) located on the first channel 21.

[0077] The working principle of the drug infusion system in this embodiment is as follows: Before operation, the first switching valve 27, the second switching valve 28, the third switching valve 31, and the fourth switching valve 32 are all closed. After operation begins, the driving fluid provided by the power source 20 is input into the drug reservoir 22 through the inlet, pushing the piston 23 to move. At this time, the first switching valve 27 opens, and under the movement of the piston 23, the drug in the drug reservoir 22 enters the membrane pump 24 through the outlet and the second passage 25. The elastic membrane layer is pressured by the drug and collapses into the metering pool, discharging the driving fluid in the metering pool and discharging it through the fifth channel 30. At this time, the fourth switching valve 32 opens. Figure 7 As shown in Figure (a); after the drug is injected into the membrane pump 24, the first switching valve 27 and the fourth switching valve 32 are closed. When it is necessary to infuse the drug into the patient, the third switching valve 28 is opened, and the power source 20 provides driving fluid to the metering pool through the fourth passage 29. Under the pressure of the driving fluid, the drug in the metering pool is squeezed into the third passage 26 to realize the infusion into the patient. At this time, the second switching valve 28 is opened; after the drug infusion is completed, both the second switching valve 28 and the third switching valve 31 are closed. Figure 7 As shown in Figure (b). All the above steps constitute one drug infusion. Depending on the needs of drug infusion, the above steps can be repeated several times to achieve multiple drug infusions.

[0078] It should be noted that the first switching valve 27 and the fourth switching valve 32 can be controlled in conjunction or independently, and the second switching valve 28 and the third switching valve 31 can be controlled in conjunction or independently.

[0079] In another example, please combine Figures 1 to 6 See Figure 8 The drug injection system may further include: a membrane pump 24, which includes a metering chamber (not shown) and an elastic membrane layer (not shown); the elastic membrane layer covers the metering chamber; a second channel 25, one end of which is connected to the drug outlet and the other end of which is connected to the membrane pump 24 and extends above the elastic membrane; a third channel 26, one end of which is connected to the membrane pump 24 and extends above the elastic membrane; a first switching valve 27, located on the second channel 25; a second switching valve 28, located on the third channel 26; a fourth channel 29, one end of which is connected to the power source 20 and the other end of which is connected to the metering chamber 24; and a fifth channel 30, one end of which is connected to the metering chamber 24.

[0080] As an example, please continue reading Figure 8 The drug injection system may further include: an air extraction device 33, which is connected to the end of the fifth channel 30 away from the metering pool.

[0081] The working principle of the drug infusion system in this embodiment is as follows: Before operation, both the first switch valve 27 and the second switch valve 28 are closed, and neither the power source 205 nor the vacuum device 33 is activated. After operation begins, the power source 200 is activated, and the driving fluid provided is input into the drug reservoir 22 through the inlet to drive the piston 23. At this time, the first switch valve 27 is opened, and under the movement of the piston 23, the drug in the drug reservoir 22 enters the membrane pump 24 through the drug outlet and the second passage 25. The elastic membrane is depressed into the metering pool under the pressure of the drug, and the vacuum device 33 is activated to extract the driving fluid from the metering pool and discharge it through the fifth channel 30. Figure 8 As shown in Figure (a); after the drug is injected into the membrane pump 24, the first switching valve 27 closes. When it is necessary to infuse the drug into the patient, the power source 20 is activated, providing driving fluid to the metering chamber via the fourth passage 207. Under the pressure of the driving fluid, the drug in the metering chamber is squeezed into the third passage 26 to achieve infusion into the patient. At this time, the second switching valve 28 opens, as shown in Figure (a). Figure 8As shown in Figure (b); after this drug infusion is completed, the second switch valve 28 is closed. All the above steps constitute one drug infusion. As needed for drug infusion, the above steps can be repeated several times to achieve multiple drug infusions.

[0082] As an example, please continue reading Figure 7 and Figure 8 The drug injection system may further include a control device 34, which is connected to both the detection device and the power source 20. The control device 34 is used to control the power source 20 to stop supplying the driving fluid to the drug reservoir 22 via the first channel 21 and the inlet when the detection device detects an abnormality. Specifically, when the control device 34 detects that the pressure in the first channel 21 reaches an allowable threshold pressure, it controls the power source 20 to stop supplying the driving fluid to the drug reservoir 22 via the first channel 21 and the inlet. By setting the control device 34, the power source 20 and the pressure monitoring device 10 can be linked, thereby ensuring the safety of the drug injection system.

[0083] Therefore, this application effectively overcomes the various shortcomings of the prior art and has high industrial application value.

[0084] The above embodiments are merely illustrative of the principles and effects of this application and are not intended to limit this application. Any person skilled in the art can modify or alter the above embodiments without departing from the spirit and scope of this application. Therefore, all equivalent modifications or alterations made by those skilled in the art without departing from the spirit and technical concept disclosed in this application should still be covered by the claims of this application.

Claims

1. A pressure monitoring device, characterized in that, Located on the fluid channel, including: An elastic membrane covers the fluid channel; A conductive layer is located on the surface of the elastic membrane away from the fluid channel or is spaced apart from the surface of the elastic membrane away from the fluid channel; the conductive layer is an integral structure or comprises multiple non-contacting first conductors; The detection device is at least connected to the conductive layer.

2. The pressure monitoring device according to claim 1, characterized in that, The detection device includes a resistance detection device.

3. The pressure monitoring device according to claim 1, characterized in that, The conductive layer is an integral structure, and the pressure monitoring device further includes: A conductive line is located on the side of the conductive layer away from the elastic membrane and is spaced apart from the conductive layer; the conductive line includes a plurality of non-contacting second conductors; The elastic membrane deforms under the pressure of the fluid in the fluid channel, and when the pressure in the fluid channel is greater than or equal to a threshold pressure, the conductive layer comes into contact with the conductive circuit. The detection device is also connected to the conductive line.

4. The pressure monitoring device according to claim 3, characterized in that, The fluid channel is located within the main structure; the pressure monitoring device also includes: An aperture is located within the main structure and on the side of the elastic membrane away from the fluid channel; the aperture covers the elastic membrane; there are multiple apertures, each with a different area; each aperture contains the conductive layer and the conductor circuit.

5. The pressure monitoring device according to claim 1, characterized in that, The conductive layer includes multiple non-contacting first conductors; the pressure monitoring device further includes: The conductive line is located on the side of the conductive layer away from the elastic membrane and is spaced apart from the conductive layer; the conductive line is an integral structure. The elastic membrane deforms under the pressure of the fluid in the fluid channel, and when the pressure in the fluid channel is greater than or equal to a threshold pressure, the conductive layer comes into contact with the conductive circuit. The detection device is also in contact with the conductive line.

6. The pressure monitoring device according to claim 5, characterized in that, The fluid channel is located within the main structure; the pressure monitoring device also includes: An aperture is located within the main structure and on the side of the elastic membrane away from the fluid channel; the aperture covers the elastic membrane; there are multiple apertures, each with a different area; each aperture contains the conductive layer and the conductor circuit.

7. A power source system, characterized in that, include: A power source, used to provide the driving fluid; The first channel is connected to the power source; The pressure monitoring device as described in any one of claims 1 to 6 is disposed on the first channel.

8. A drug delivery system, characterized in that, include: A medicine storage device, wherein the medicine storage device has a medicine storage chamber, one end of the medicine storage device is provided with a medicine outlet, and the other end of the medicine storage device is provided with an inlet; The piston is located inside the drug reservoir; The power source system as described in claim 7; the end of the first channel away from the power source is connected to the inlet.

9. The drug delivery system according to claim 8, characterized in that: The drug injection system also includes: A membrane pump includes a metering tank and an elastic membrane layer; the elastic membrane layer covers the metering tank. The second channel is connected at one end to the drug outlet and at the other end to the membrane pump, and extends above the elastic membrane layer. The third channel is connected at one end to the membrane pump and extends above the elastic membrane layer; The first switching valve is located on the second channel; The second switching valve is located on the third channel; The fourth channel is connected at one end to the power source and at the other end to the metering pool; The fifth channel is connected at one end to the quantitative pool.

10. The drug delivery system according to claim 9, characterized in that: Also includes: The third switching valve is located on the fourth channel; The fourth switching valve is located on the fifth channel; The fifth switching valve is located on the first channel.

11. The drug delivery system according to claim 9, characterized in that: Also includes: An air extraction device is connected to the end of the fifth channel furthest from the metering pool.

12. The drug delivery system according to any one of claims 8 to 11, characterized in that: Also includes: A control device, connected to both the detection device and the power source, is used to control the power source to stop supplying the driving fluid to the drug reservoir via the first channel and the inlet when the detection device detects an abnormality.

Images