Liquid medicine filter

Abstract

The utility model discloses a liquid medicine filter. A shell is provided with a closed cavity, a liquid inlet and a liquid outlet, wherein the liquid inlet and the liquid outlet are communicated with the closed cavity; the filter unit comprises a partition plate, a bubble puncture assembly, a first filter membrane and a second filter membrane; the partition plate is blocked between the liquid inlet and the liquid outlet and divides the closed cavity into a first filter cavity and a second filter cavity; a channel is formed in the partition plate; the bubble puncture assembly comprises a blocking plate and a puncture needle; the blocking plate is blocked in the channel, and a plurality of via holes are distributed in the blocking plate; the puncture needles are inserted into the blocking plate and are distributed on the outer side of the periphery of the via hole; the first filtering membrane is intercepted between the channel and the liquid inlet; and the second filter membrane is intercepted between the channel and the liquid outlet. According to the liquid medicine filter, the liquid medicine filter is not easy to block in a mode that the two layers of filter membranes are used for filtering in an echelon mode, the liquid medicine filtering effect is effectively improved, bubbles hidden in liquid medicine can be punctured, and the bubbles are not easy to hide in the liquid medicine, so that the liquid medicine conveying process is stable and smooth.

Description

Technical Field

[0001] This utility model relates to the field of medical device technology, and in particular to a liquid medicine filter. Background Technology

[0002] In the medical field, medication filters are needed to filter the medication solution during the injection of certain special drugs. This filters out insoluble particles generated during drug preparation, debris from puncturing the infusion bottle, and small particles remaining in the infusion set itself. Currently, most medication filtration uses single-layer membrane filters. However, due to the limited filtration capacity of the membrane, it is prone to clogging, affecting the flow rate of the medication. Furthermore, if the internal structure of the filter is inappropriate, air bubbles can easily become trapped in the medication solution during filtration. These trapped air bubbles can clog the membrane or slow down the flow rate, making the injection process unstable and failing to effectively meet the medication injection requirements. Utility Model Content

[0003] To address the aforementioned technical problems, the purpose of this utility model is to propose a medicine filter that uses a two-layer filter membrane for step-by-step filtration, making the medicine filter less prone to clogging, effectively improving the filtration effect, and breaking hidden air bubbles in the medicine, thus preventing air bubbles from hiding in the medicine and ensuring a smooth and stable medicine delivery process, effectively meeting the needs of medicine injection.

[0004] The technical solution of this utility model is achieved as follows: a liquid medicine filter, including a housing and a filter unit;

[0005] The housing has a closed cavity, and an inlet and an outlet communicating with the closed cavity;

[0006] The filtration unit is disposed in a closed cavity and includes a partition, a bubble puncture assembly, a first filter membrane, and a second filter membrane;

[0007] The partition intercepts the liquid inlet and the liquid outlet, and divides the enclosed cavity into a first filtration cavity and a second filtration cavity; the partition is provided with a channel connecting the first filtration cavity and the second filtration cavity;

[0008] The bubble puncture assembly is disposed in the channel and includes a blocking plate and a puncture needle; the blocking plate is intercepted in the channel and has a plurality of through holes distributed on it; the puncture needle is inserted into the blocking plate and is distributed around the outside of the through holes; the puncture end of the puncture needle extends to the side of the blocking plate near the first filter chamber.

[0009] The first filter membrane is disposed in the first filter chamber and is intercepted between the channel and the liquid inlet;

[0010] The second filter membrane is disposed in the second filter chamber and is intercepted between the channel and the outlet.

[0011] Furthermore, the housing includes a bottom shell and a top cover; the top cover has a closed state that is detachably sealed to the bottom shell; both ends of the partition are inserted into the inner wall of the bottom shell; in the closed state, the bottom surface of the partition is in sealing contact with the inner bottom surface of the bottom shell, and the top surface of the partition is in sealing contact with the top cover.

[0012] Furthermore, both the first and second filter membranes are arc-shaped structures; the partition plate is provided with an annular support; the annular support has a first support portion extending to the first filter chamber and a second support portion extending to the second filter chamber; in the closed state, the bottom surface of the annular support is in sealed contact with the inner bottom surface of the bottom shell, and the top surface of the annular support is in sealed contact with the top cover; the first filter membrane is disposed on the first support portion; and the second filter membrane is disposed on the second support portion.

[0013] Furthermore, the upper and lower sides of the first filter membrane are sealed and inserted into the first support portion, and the two ends of the first filter membrane along its length are sealed and inserted into the partition plate.

[0014] Furthermore, the upper and lower sides of the second filter membrane are sealed and inserted into the second support portion, and the two ends of the second filter membrane in the length direction are sealed and inserted into the partition.

[0015] Furthermore, the plug plate is threadedly connected to the channel.

[0016] Furthermore, the puncture tip of the puncture needle is retracted inside the channel.

[0017] Furthermore, the pore size of the first filter membrane is larger than that of the second filter membrane; and the aperture of the through-hole is larger than that of the first filter membrane.

[0018] Due to the application of the above technical solution, this utility model has the following advantages compared with the prior art:

[0019] 1. This utility model utilizes a filtration unit in conjunction with other components. The liquid medicine is filtered sequentially through a first filter membrane, a channel, and a second filter membrane. As the medicine passes through the channel, densely packed needles puncture hidden air bubbles in the liquid, reducing their number. This combination of methods, using a two-layer filtration system, enhances the overall filtration capacity, preventing clogging and effectively improving the filtration efficiency. Furthermore, the ability to puncture hidden air bubbles ensures a smooth and stable delivery of the medicine, effectively meeting the needs of medicine injection.

[0020] 2. In this utility model, the first filter membrane and the second filter membrane are designed with an arc-shaped structure to increase the filtration area, further effectively prevent the first filter membrane and the second filter membrane from clogging and improve the filtration capacity of the medicine.

[0021] 3. In this utility model, the partition is installed in the housing by plugging in, which facilitates the disassembly and replacement of the filter unit and makes it highly practical. Attached Figure Description

[0022] The technical solution of this utility model will be further described below with reference to the accompanying drawings:

[0023] Figure 1 This is a three-dimensional structural diagram of the overall structure of this utility model;

[0024] Figure 2 for Figure 1 Exploded view;

[0025] Figure 3 for Figure 1 A sectional view of the structure;

[0026] Figure 4 This is a schematic diagram of the assembly of the filter unit and the bottom shell of this utility model;

[0027] Figure 5 This is an assembly diagram of the filter unit of this utility model;

[0028] Figure 6 This is a three-dimensional structural schematic diagram of the bubble puncture component of this utility model;

[0029] Figure 7 for Figure 6 A side view structural diagram;

[0030] The components are: 1. Shell; 11. Bottom shell; 12. Top cover; 13. Liquid inlet; 14. Liquid outlet; 15. First filter chamber; 16. Second filter chamber; 17. Slot; 2. Partition; 21. Channel; 3. Annular support; 4. Bubble puncture assembly; 41. Blocking plate; 411. Through hole; 42. Puncture needle; 5. First filter membrane; 6. Second filter membrane; 7. Sealing strip. Detailed Implementation

[0031] The preferred embodiments of the present invention will now be described in detail with reference to the accompanying drawings, so that the advantages and features of the present invention can be more easily understood by those skilled in the art, thereby making a clearer and more definite definition of the scope of protection of the present invention.

[0032] like Figure 1-7The illustration shows a drug solution filter according to this embodiment, which is installed in an infusion system for filtering injectable drugs. The drug solution filter includes a housing 1 and a filter unit. The housing 1 is a container for drug solution filtration, and its housing 1 includes a bottom shell 11 and a top cover 12. The top of the bottom shell 11 is open, and the top cover 12 is bolted to the bottom shell 11 to seal the top opening, thus the top cover 12 is in a closed state. In this closed state, a closed cavity is formed between the bottom shell 11 and the top cover 12. An inlet 13 and an outlet 14, communicating with the closed cavity, are machined on the outer wall of the bottom shell 11. A drug solution flow direction is formed between the inlet 13 and the outlet 14. The drug solution enters the closed cavity through the inlet 13 and then exits through the outlet 14.

[0033] By opening the top cover 12, the aforementioned filter unit can be installed in the closed cavity. The filter unit includes a partition 2, a bubble puncture assembly 4, a first filter membrane 5, and a second filter membrane 6. The partition 2 intercepts the liquid inlet 13 and the liquid outlet 14, dividing the closed cavity into a first filter cavity 15 and a second filter cavity 16. The liquid inlet 13 communicates with the first filter cavity 15, and the liquid outlet 14 communicates with the second filter cavity 16. In this embodiment, vertically extending slots 17 are machined on opposite sides of the inner wall of the bottom shell 11. Both ends of the partition 2 can be sealed and inserted into the slots 17 to complete the installation. A sealing strip 7 is embedded on the top and bottom surfaces of the partition 2, extending along the length of the partition 2. When the top cover 12 is closed, the bottom surface of the partition 2 is in sealed contact with the inner bottom surface of the bottom shell 11 through the sealing strip 7, and the top surface of the partition 2 is in sealed contact with the top cover 12 through the sealing strip 7.

[0034] The partition 2 has several channels 21 connected to the first filter chamber 15 and the second filter chamber 16. The aforementioned bubble puncture assembly 4 is installed in the channel 21 and includes a plug plate 41 and puncture needles 42. The plug plate 41 is intercepted in the channel 21. Specifically, the outer diameter of the plug plate 41 is adapted to the inner diameter of the channel 21. Threaded sections are machined on the inner wall of the channel 21 and on the outer wall of the plug plate 41, so that the plug plate 41 is installed in the channel 21 by a threaded sealing connection. Several through holes 411 are distributed on the plug plate 41. The medicine flows in the channel 21 through the through holes 411. The aforementioned puncture needles 42 are densely distributed on the plug plate 41 and distributed around the periphery of the through holes 411. The puncture end of the puncture needle 42 extends to the side of the plug plate 41 near the first filter chamber 15. In a specific structural design, the puncture end of the puncture needle 42 is concealed inside the channel 21. With the above structural design, when the medicine flows from the first filter chamber 15 to the second filter chamber 16 through the channel 21, most of the air bubbles in the medicine can contact the puncture end of the puncture needle 42 to puncture the air bubbles.

[0035] It should be noted that the puncture needle 42 can puncture air bubbles of a certain size in the medication solution, but cannot completely puncture all air bubbles in the solution. The degree of air bubble removal is related to the density of the puncture needle 42.

[0036] In this embodiment, the aforementioned first filter membrane 5 is installed in the first filter chamber 15 and is intercepted between the channel 21 and the inlet 13. As the liquid flows from the inlet 13 to the channel 21, it is filtered through the first filter membrane 5.

[0037] The second filter membrane 6 is installed in the second filter chamber 16 and is positioned between the channel 21 and the outlet 14. As the liquid flows from the channel 21 to the outlet 14, it is filtered by the second filter membrane 6. In this embodiment, the pore size of the first filter membrane 5 is larger than that of the second filter membrane 6, allowing the first filter membrane 5 to filter larger impurities and the second filter membrane 6 to filter smaller impurities. Furthermore, the second filter membrane 6 can also filter air bubbles that have not been punctured by the puncture needle 42. The diameter of the aforementioned through-hole 411 is larger than that of the first filter membrane 5, allowing the liquid to pass smoothly through the through-hole 411.

[0038] In this embodiment, both the first filter membrane 5 and the second filter membrane 6 are arc-shaped structures. An annular support 3 is mounted on the partition 2. The central axis of the annular support 3 extends along the width direction of the partition 2 (in this embodiment, it extends vertically). The annular support 3 is integrally formed with the partition 2. The annular support 3 has a first support portion extending to the first filter chamber 15 and a second support portion extending to the second filter chamber 16. Both the first and second support portions are arc-shaped structures to fit the first filter membrane 5 and the second filter membrane 6. A sealing strip 7 is embedded on the top surface and the bottom surface of the annular support 3, extending circumferentially along the annular support 3. When the upper cover 12 is closed, the bottom surface of the annular support 3 is in sealed contact with the inner bottom surface of the bottom shell 11 via the sealing strip 7, and the top surface of the annular support 3 is in sealed contact with the upper cover 12 via the sealing strip 7. The aforementioned sealing strip 7 is made of silicone material. The aforementioned first filter membrane 5 is mounted on the first support portion and supported by it. Specifically, the upper and lower sides of the first filter membrane 5 are sealed and inserted into the upper and lower arc-shaped grooves on the first support portion. The two ends of the first filter membrane 5 along its length are sealed and inserted into the linear grooves on the partition plate 2. Similarly, the aforementioned second filter membrane 6 is installed on the second support portion and supported by it. The upper and lower sides of the second filter membrane 6 are sealed and inserted into the upper and lower arc-shaped grooves on the second support portion, and the two ends of the second filter membrane 6 along its length are sealed and inserted into the linear grooves on the partition plate 2. Through the above structural design, the first filter membrane 5 and the second filter membrane 6 are designed with an arc-shaped structure to increase the filtration area, further effectively preventing clogging of the first filter membrane 5 and the second filter membrane 6 and improving the filtration capacity of the drug solution.

[0039] In practical use, the liquid medicine enters the first filter chamber 15 through the inlet 13, then passes through the first filter membrane 5 into the channel 21, and then enters the second filter chamber 16 through the through-hole 411 on the blocking plate 41. Finally, it is discharged from the outlet 14 through the second filter membrane 6. The liquid medicine undergoes primary filtration after passing through the first filter membrane 5 and secondary filtration after passing through the second filter membrane 6. When the liquid medicine passes through the channel 21, the densely packed needles can puncture hidden air bubbles in the liquid medicine, reducing the number of air bubbles. This combination of methods, through the step-by-step filtration of two filter membranes, improves the overall filtration capacity of the structure, making the liquid medicine filter less prone to clogging and effectively improving the filtration effect. Furthermore, it can puncture hidden air bubbles in the liquid medicine, making it less likely for air bubbles to remain, thus ensuring a smooth and stable delivery process and effectively meeting the needs of liquid medicine injection. The entire filter unit can be removed from the bottom shell 11 by opening the top cover 12 and pulling out the partition 2, thereby completing the disassembly of the filter unit.

[0040] The above description is merely an embodiment of this utility model and does not limit the patent scope of this utility model. Any equivalent structural or procedural transformations made based on the content of this utility model specification, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this utility model.

Claims

1. A liquid medicine filter, comprising a housing and a filter unit; characterized in that: The housing has a closed cavity, and an inlet and an outlet communicating with the closed cavity; The filtration unit is disposed in a closed cavity and includes a partition, a bubble puncture assembly, a first filter membrane, and a second filter membrane; The partition intercepts the liquid inlet and the liquid outlet, and divides the enclosed cavity into a first filtration cavity and a second filtration cavity; the partition is provided with a channel connecting the first filtration cavity and the second filtration cavity; The bubble puncture assembly is disposed in the channel and includes a blocking plate and a puncture needle; the blocking plate is intercepted in the channel and has a plurality of through holes distributed on it; the puncture needle is inserted into the blocking plate and is distributed around the outside of the through holes; the puncture end of the puncture needle extends to the side of the blocking plate near the first filter chamber. The first filter membrane is disposed in the first filter chamber and is intercepted between the channel and the liquid inlet; The second filter membrane is disposed in the second filter chamber and is intercepted between the channel and the outlet.

2. The liquid medicine filter according to claim 1, characterized by: The housing includes a bottom shell and a top cover; the top cover has a closed state that is detachably sealed to the bottom shell; the two ends of the partition are inserted into the inner wall of the bottom shell; in the closed state, the bottom surface of the partition is in sealed contact with the inner bottom surface of the bottom shell, and the top surface of the partition is in sealed contact with the top cover.

3. The liquid medicine filter according to claim 1, characterized by: Both the first and second filter membranes have an arc-shaped structure; the partition plate is provided with an annular support; the annular support has a first support portion extending to the first filter chamber and a second support portion extending to the second filter chamber; In the closed state, the bottom surface of the annular bracket is in sealed contact with the inner bottom surface of the bottom shell, and the top surface of the annular bracket is in sealed contact with the top cover; the first filter membrane is disposed on the first support portion; The second filter membrane is disposed on the second support portion.

4. The liquid medicine filter according to claim 3, characterized by: The upper and lower sides of the first filter membrane are sealed and inserted into the first support portion, and the two ends of the first filter membrane along its length are sealed and inserted into the partition plate.

5. The liquid medicine filter according to claim 3, characterized by: The upper and lower sides of the second filter membrane are sealed and inserted into the second support portion, and the two ends of the second filter membrane along its length are sealed and inserted into the partition plate.

6. The liquid medicine filter according to claim 1, characterized by: The plug plate is threadedly connected to the channel.

7. The liquid medicine filter according to claim 1, characterized by: The puncture tip of the puncture needle is housed inside the channel.

8. The liquid medicine filter according to claim 1, characterized by: The pore size of the first filter membrane is larger than that of the second filter membrane; and the aperture of the through-hole is larger than that of the first filter membrane.

Images