Air filter of infusion system

Abstract

The utility model discloses an infusion system air filter which comprises an air filtering flexible cavity, two purifying filter membranes are arranged in the air filtering flexible cavity, connecting cavities are installed at the two ends of the air filtering flexible cavity, and a connecting plug is installed at one end of each connecting cavity. After the connecting plug is connected with the connecting pipeline, the connecting ring moves to the inserting position of the connecting plug and the connecting pipeline by moving the two movable blocks, so that the sealing balloon abuts against the inserting position of the connecting plug and the connecting pipeline for sealing again, and the sealing effect is improved; the outer side wall of a second limiting convex block abuts against the outer side wall of a first limiting convex block, so that a movable block is self-limited, and the problems that the connecting part of an external pipeline and the device is prone to being disconnected, liquid medicine is lost, microorganisms can enter an infusion system through cracks, and the safety of the device is reduced are effectively solved.

Description

Technical Field

[0001] This utility model relates to the field of infusion system technology, specifically to an air filter for an infusion system. Background Technology

[0002] Intravenous infusion is currently one of the most common clinical treatment methods. It typically involves using an infusion set connected to a medication container. The medication flows into the infusion set by gravity and is then infused into the patient's bloodstream to achieve therapeutic effects. During use, as the medication gradually flows into the infusion system, a negative pressure gradually forms in the medication container. Therefore, infusion sets are usually equipped with an air intake device. The most common method is through an air vent on the air intake needle of the infusion set, or by using a separate air intake hose inserted directly through a steel needle into the rubber stopper of the medication container. Regardless of the method used, current methods employ a filter membrane to filter the air entering the infusion system.

[0003] In the prior art, the air filter of the infusion system is an important component of the infusion device. It is mainly used to filter the air entering the infusion system to prevent harmful impurities such as airborne particles and microorganisms from entering the infusion liquid. Its purpose is to ensure the safety and quality of the infusion and avoid adverse reactions such as infusion reactions caused by impurities. However, the air inlet and outlet of the air filter cannot guarantee the stability of the connection with the external pipeline. During use, the connection between the external pipeline and the device is prone to breakage, resulting in drug leakage. Furthermore, microorganisms may enter the infusion system through cracks, reducing the safety of the device.

[0004] A search revealed a Chinese patent document disclosing an air filter for infusion sets (publication number: CN212631354U). This air filter includes an air filter head, a hose, and connectors, characterized by further including a fixing component. The air filter head comprises a top cover, a body, and a filter element. The top cover has a hollow top cover connector, the hollow structure of which serves as an air outlet. The body is hollow, with a through hole at the bottom for an air inlet. The filter element is a hollow cylindrical structure made of sintered PP material. The filter element's structural design allows it to achieve a seal with the body without the use of adhesives. When placed within the body, it maintains a gap, increasing the contact area between the filter element and air, improving filtration efficiency, and enhancing airflow. The connectors are designed in two different forms: a connector and a steel needle. This flexible design allows for compatibility with various current infusion set types, enabling widespread application of the invention without altering the industry's product structure. However, the following drawbacks remain:

[0005] While the aforementioned air filter for infusion sets achieves a flexible design that can be arbitrarily matched with various current infusion set types, thus enabling the invention to be widely used without changing the industry's product structure, it still has drawbacks. The air filter's inlet and outlet cannot guarantee the stability of the connection with the external pipeline. During use, the connection between the external pipeline and the device is prone to breakage, leading to drug leakage. Furthermore, microorganisms may enter the infusion system through cracks, reducing the device's safety. Utility Model Content

[0006] The purpose of this invention is to provide an air filter for an infusion system, which solves the problems mentioned in the background art, such as the air filter's inlet and outlet not being able to guarantee the stability of the connection with the external pipeline, the external pipeline being prone to disconnection during use, resulting in drug leakage, and microorganisms potentially entering the infusion system through cracks, reducing the safety of the device.

[0007] To achieve the above objectives, this utility model provides the following technical solution: an air filter for an infusion system, comprising a flexible air filtration cavity, wherein two purification filter membranes are disposed inside the flexible air filtration cavity, and connecting cavities are installed at both ends of the flexible air filtration cavity, wherein a connector is installed at one end of each connecting cavity, and movable cavities are symmetrically installed at one end of each connecting cavity, wherein movable blocks are movably connected inside each movable cavity, and connecting rings are installed between the movable blocks, and sealing balloons are installed on the inner sidewalls of the connecting rings.

[0008] Preferably, a flexible connecting layer is installed on the outer sidewall of both purification filter membranes, and the flexible connecting layer is arranged in a circular ring structure. The outer sidewall of the flexible connecting layer is connected to the inner sidewall of the air filtration flexible cavity.

[0009] Preferably, the top of the air filter flexible cavity is provided with a plurality of mounting holes at equal intervals, and each mounting hole is filled with a flexible steel wire.

[0010] Preferably, one end of the connector is symmetrically equipped with silicone baffles, and one end of the connector is equipped with a silicone sealing ring, wherein the silicone sealing ring is a circular ring structure.

[0011] Preferably, the front and rear ends of the movable block are each equipped with a first limiting protrusion at equal intervals, and the first limiting protrusion is a semi-cylindrical structure.

[0012] Preferably, the outer wall of the first limiting protrusion abuts against the outer wall of the second limiting protrusion, and the second limiting protrusion is installed at equal intervals at one end of the flexible sheet, and the flexible sheet is symmetrically installed inside the movable cavity.

[0013] Preferably, one of the two movable cavities at one end of the connecting cavity has a through cavity on one side, and a toggle block is movably connected inside the through cavity, with one end of the toggle block connected to the outer wall of the corresponding movable block.

[0014] Compared with the prior art, the beneficial effects of this utility model are:

[0015] 1. In use, after the connector is connected to the connecting pipe, the two movable blocks move, allowing the connecting ring to move to the point where the connector and connecting pipe are inserted. This causes the sealing balloon to press against the point where the connector and connecting pipe are inserted, thus resealing and improving the sealing effect. Furthermore, when the movable blocks move to the appropriate area, the outer wall of the second limiting protrusion abuts against the outer wall of the first limiting protrusion, thereby limiting the movable blocks. This effectively prevents the connection between the external pipe and the device from easily breaking, which could lead to drug leakage and allow microorganisms to enter the infusion system through cracks, reducing the safety of the device.

[0016] 2. In use, the flexible air filter cavity of this utility model is flexible and has a certain strength through the flexible steel wire. When the filtration effect of the flexible air filter cavity is not good, the filtration effect and the throughput are enhanced by squeezing the flexible air filter cavity. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the main structure of this utility model;

[0018] Figure 2 This is a schematic diagram of the combined component structure of the flexible air filtration cavity, flexible connecting layer, and purification filter membrane in this utility model.

[0019] Figure 3 For practical purposes Figure 2 Enlarged structural diagram of part A in the diagram;

[0020] Figure 4 This is a schematic diagram of the combined component structure of the connecting cavity, connector, silicone baffle and silicone sealing ring in this utility model;

[0021] Figure 5 This is a schematic diagram of the combined structure of the movable cavity, movable block, connecting ring and sealing balloon in this utility model.

[0022] In the diagram: 1. Flexible air filter cavity; 2. Flexible connecting layer; 3. Purification filter membrane; 4. Flexible steel wire; 5. Connecting cavity; 6. Connector; 7. Silicone baffle; 8. Silicone sealing ring; 9. Movable cavity; 10. Movable block; 11. Connecting ring; 12. Sealing balloon; 13. First limiting protrusion; 14. Second limiting protrusion; 15. Flexible sheet; 16. Through cavity; 17. Actuating block. Detailed Implementation

[0023] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention.

[0024] Please see Figure 1-5 This utility model provides an air filter for an infusion system, including an air filtration flexible cavity 1, a flexible connecting layer 2 with a circular structure symmetrically fixed to the inner side wall of the air filtration flexible cavity 1, and a purification filter membrane 3 fixedly connected to the inner side wall of the flexible connecting layer 2. The top of the air filtration flexible cavity 1 can be provided with a number of mounting holes for fixing flexible steel wires 4 at equal intervals.

[0025] With the flexible air filter chamber 1 in place, several flexible steel wires 4 are fixedly connected inside the chamber during use. This gives the flexible air filter chamber 1 both flexibility and strength. It can then filter the air through two purification filter membranes 3. Furthermore, when the filtration effect of the flexible air filter chamber 1 is not good, the filtration effect can be enhanced by squeezing the flexible air filter chamber 1.

[0026] Both ends of the flexible air filter cavity 1 are fixedly connected to a connecting cavity 5. One end of each connecting cavity 5 is fixedly connected to a connector 6. The end of the connecting cavity 5 connected to the connector 6 and the end connected to the flexible air filter cavity 1 are connected. The end of the connector 6 away from the connecting cavity 5 is symmetrically fixedly connected to a silicone baffle 7. The end of the connector 6 away from the connecting cavity 5 is fixedly connected to a silicone sealing ring 8 with a circular structure.

[0027] The connector 6 allows for insertion and connection with pipes, etc. After insertion and connection, the silicone baffle 7 will wrap around the outer wall of the connecting pipe, and the silicone sealing ring 8 will further improve the sealing effect.

[0028] One end of the connecting cavity 5 is symmetrically and fixedly connected to a movable cavity 9 via a connector 6. The movable cavity 9 is movably connected to a movable block 10 with a "convex" structure. A connecting ring 11 with a circular structure is fixedly connected between the movable blocks 10. The inner wall diameter of the connecting ring 11 is larger than the outer wall diameter of the connector 6. A sealing balloon 12 with a circular structure is fixedly connected to the inner wall of the connecting ring 11.

[0029] With the sealing bulb 12 in place, during use, when the connector 6 is connected to the connecting pipe, the two movable blocks 10 move, causing the connecting ring 11 to move to the insertion point of the connector 6 and the connecting pipe. This allows the sealing bulb 12 to press against the insertion point of the connector 6 and the connecting pipe, thus resealing and improving the sealing effect.

[0030] The front and rear ends of the movable block 10 are fixedly connected with a first limiting protrusion 13 with a semi-cylindrical structure at equal intervals. The outer wall of the first limiting protrusion 13 abuts against the outer wall of the second limiting protrusion 14 with a semi-cylindrical structure. The second limiting protrusion 14 is fixedly connected to the outer wall of one end of the flexible sheet 15 at equal intervals. The flexible sheet 15 is symmetrically fixedly connected inside the movable cavity 9. One side of one of the two movable cavities 9 set at one end of the connecting cavity 5 is provided with a through cavity 16. The through cavity 16 is vertically movably connected to a toggle block 17. One end of the toggle block 17 is fixedly connected to the outer wall of the corresponding movable block 10.

[0031] With the set toggle block 17, during use, the two movable blocks 10 can be moved by toggling the toggle block 17. When the movable block 10 moves to the appropriate area, the outer wall of the second limiting protrusion 14 abuts against the outer wall of the first limiting protrusion 13, thereby limiting the movable block 10.

[0032] In use, the embodiments of this application first connect the connector 6 to the connecting pipe, etc., and after the connection is made, the silicone baffle 7 will wrap around the outer wall of the connecting pipe, and the silicone sealing ring 8 will further improve the sealing effect.

[0033] Secondly, after the connector 6 is connected to the connecting pipe, the two movable blocks 10 are moved, so that the connecting ring 11 moves to the insertion point of the connector 6 and the connecting pipe, so that the sealing ball 12 abuts against the insertion point of the connector 6 and the connecting pipe. At the same time, the set toggle block 17 can be moved during use, thereby driving the two movable blocks 10 to move. When the movable block 10 moves to the appropriate area, the outer wall of the second limiting protrusion 14 abuts against the outer wall of the first limiting protrusion 13, thereby limiting the movable block 10.

[0034] Subsequently, when the device is in use, the air is filtered through two purification filter membranes 3.

[0035] Finally, when the air filter flexible cavity 1 is not filtering effectively, the air filter flexible cavity 1 is squeezed, and the air filter of the infusion system is thus completed.

[0036] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. An air filter for an infusion system, comprising a flexible air filtration chamber (1), characterized in that: The air filtration flexible cavity (1) is provided with two purification filter membranes (3), and both ends of the air filtration flexible cavity (1) are equipped with connecting cavities (5). One end of each connecting cavity (5) is equipped with a plug (6), and one end of each connecting cavity (5) is symmetrically equipped with a movable cavity (9). The movable cavity (9) is movably connected with a movable block (10), and a connecting ring (11) is installed between the movable blocks (10). A sealing balloon (12) is installed on the inner wall of the connecting ring (11).

2. An air filter for an infusion system according to claim 1, characterized in that: Both of the purification filter membranes (3) have a flexible connecting layer (2) installed on their outer sidewalls, and the flexible connecting layer (2) is arranged in a circular ring structure. The outer sidewall of the flexible connecting layer (2) is connected to the inner sidewall of the air filtration flexible cavity (1).

3. An air filter for an infusion system according to claim 1, characterized in that: The top of the air filter flexible cavity (1) has several mounting holes at equal intervals, and each mounting hole is fitted with a flexible steel wire (4).

4. An air filter for an infusion system according to claim 1, characterized in that: The connector (6) has a silicone baffle (7) symmetrically installed inside one end, and a silicone sealing ring (8) is installed on one end of each connector (6). The silicone sealing ring (8) is a circular ring structure.

5. An air filter for an infusion system according to claim 1, characterized in that: The front and rear ends of the movable block (10) are each equipped with a first limiting protrusion (13) at equal intervals, and the first limiting protrusion (13) is a semi-cylindrical structure.

6. An air filter for an infusion system according to claim 5, characterized in that: The outer wall of the first limiting protrusion (13) abuts against the outer wall of the second limiting protrusion (14), and the second limiting protrusion (14) is installed at equal intervals at one end of the flexible sheet (15), and the flexible sheet (15) is symmetrically installed inside the movable cavity (9).

7. An air filter for an infusion system according to claim 1, characterized in that: One of the two movable cavities (9) provided at one end of the connecting cavity (5) has a through cavity (16) on one side, and a toggle block (17) is movably connected inside the through cavity (16). One end of the toggle block (17) is connected to the outer wall of the corresponding movable block (10).

Images