Automatic venting and liquid-stopping filter

Abstract

This utility model discloses an automatic venting and liquid-stopping filter, including a main cover, a venting unit, and a filtering unit. The main cover includes a lower cover and an upper cover, and is pear-shaped with opposing upper and lower processing areas. The venting unit is located in the upper processing area and includes a breathable support and a breathable membrane mounted on the breathable support. The breathable membrane is used to expel air bubbles floating in the upper processing area. The filtering unit is located in the lower processing area and includes a filter support and a filter membrane mounted on the filter support. The filter membrane is used to filter and stop the liquid infusion. Through this method, the automatic venting and liquid-stopping filter of this utility model can be widely used in medical infusion, achieving the effects of filtering the liquid infusion, automatic venting, and automatic liquid-stopping, improving the overall system operating efficiency, saving time and manpower, and ensuring product quality.

Description

Technical Field

[0001] This utility model relates to the field of medical device technology, and in particular to an automatic venting and liquid-stopping filter. Background Technology

[0002] Traditional infusion filters play an important role in medical applications. Their main function is to remove particulate matter, such as tiny drug crystals and blood clots, from the infusion process and effectively block the invasion of microorganisms, thereby reducing the risk of infection caused by infusion.

[0003] However, this traditional device also has significant drawbacks:

[0004] First, it cannot effectively remove air bubbles from the liquid. Once air bubbles enter the human vascular system with the infusion, it may cause an extremely serious medical complication called air embolism, which can be life-threatening.

[0005] Secondly, when the medication is exhausted during the infusion process, backflow of blood often occurs due to the pressure in the venous system. This process requires continuous manual monitoring by medical staff, which not only increases the workload but also brings inconvenience and complexity to the operation. Utility Model Content

[0006] The main technical problem solved by this utility model is to provide an automatic air venting and liquid stopping filter, which is widely used in medical infusion. It can achieve the effects of filtering medicine, automatic air venting and automatic liquid stopping, improve the operating efficiency of the whole system, save time and manpower, and ensure product quality.

[0007] To solve the above-mentioned technical problems, the present invention provides an automatic venting and liquid-stopping filter, comprising:

[0008] The main body, including the lower cover and the upper cover that is connected to the lower cover, is pear-shaped and has a corresponding upper processing area and a lower processing area.

[0009] An exhaust unit, located in the upper processing area, includes a breathable support and a breathable membrane mounted on the breathable support. The breathable membrane is used to exhaust air bubbles floating in the upper processing area.

[0010] The filtration unit, located in the lower processing area, includes a filter support and a filter membrane mounted on the filter support. The filter membrane is used to filter and stop the liquid from flowing into the medicine.

[0011] In a preferred embodiment of the present invention, the upper cover is provided with a liquid inlet pipe, the lower cover is provided with a liquid outlet pipe, and the breathable membrane and the filter membrane work together to divide the internal space of the main cover into a liquid inlet chamber and a liquid outlet chamber.

[0012] In a preferred embodiment of the present invention, a vent is further included. The vent is located on the side of the lower cover near the upper processing area and is able to communicate with the outside atmosphere.

[0013] In a preferred embodiment of this utility model, both the ventilated support and the filter support are arranged in a ring shape, and there is a height difference between the ventilated support and the filter support, which spatially separates the exhaust unit and the filter unit.

[0014] In a preferred embodiment of this utility model, the breathable support is set higher than the filter support, and the height difference between the breathable support and the filter support is 2-6mm.

[0015] In a preferred embodiment of this utility model, the breathable membrane is fixed to the breathable support member by hot-press welding, and the filter membrane is fixed to the filter support member by hot-press welding.

[0016] In a preferred embodiment of this utility model, the breathable membrane is a PTFE composite membrane with a pore size of 0.16~0.28μm, a diameter of 7~12mm, a thickness of 0.12~0.26mm, and an air permeability of 480~550ml / cm².min.

[0017] In a preferred embodiment of this utility model, the breathable membrane has a pore size of 0.22μm, a diameter of 9mm, a thickness of 0.2mm, and an air permeability of 500ml / cm².min.

[0018] In a preferred embodiment of this utility model, the filter membrane is a PES membrane with a pore size of 6~8μm, a diameter of 18~22mm, and a thickness of 0.12~0.26mm.

[0019] In a preferred embodiment of this utility model, the filter membrane has a pore size of 8μm, a diameter of 21mm, and a thickness of 0.2mm.

[0020] The beneficial effects of this invention are: it effectively removes air bubbles through the breathable membrane and vents, reducing the risk of air embolism; it ensures liquid purity through the filter membrane, reducing the possibility of infection and improving filtration efficiency; at the same time, the automatic liquid stop function reduces the need for backflow and manual adjustment of venting, improving operational efficiency and saving time and manpower. Through effective venting and filtration, it improves the overall system operating efficiency and ensures product quality. Attached Figure Description

[0021] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort, wherein:

[0022] Figure 1 This is a schematic diagram of a preferred embodiment of the automatic venting and liquid-stopping filter of this utility model;

[0023] Figure 2 This is a schematic diagram of the lower cover of this utility model without the installation of the breathable membrane and the filter membrane;

[0024] Figure 3 This is a schematic diagram of the structure of the lower cover of this utility model, which is equipped with a breathable membrane and a filter membrane.

[0025] The components in the attached diagram are labeled as follows:

[0026] 1. Top cover, 2. Bottom cover, 3. Inlet pipe, 4. Outlet pipe, 5. Upper processing area, 6. Lower processing area, 7. Ventilation support, 8. Ventilation membrane, 9. Filter support, 10. Filter membrane, 11. Exhaust vent. Detailed Implementation

[0027] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. The components of the embodiments of this utility model described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0028] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0029] Please see Figures 1 to 3 This embodiment provides an automatic venting and liquid-stopping filter, suitable for medical infusion, including a main cover, an venting unit for venting and a filtering unit for filtering and stopping liquid, disposed inside the main cover.

[0030] In this embodiment, the main cover includes a lower cover 2 and an upper cover 1 that is connected to the lower cover 2. The upper cover 1 is provided with an inlet pipe 3, and the lower cover 2 is provided with an outlet pipe 4 to ensure that the medicine can continuously flow in and out.

[0031] Based on the above structure, the main cover is pear-shaped and has a small diameter end and a large diameter end that are set opposite to each other. The small diameter end is set as the upper processing area 5, and the large diameter end is set as the lower processing area 6.

[0032] In detail, the first part is the exhaust unit, which is located in the upper processing area 5. It includes a breathable support 7 and a breathable membrane 8 installed on the breathable support 7. The breathable membrane 8 is used to exhaust the air bubbles floating in the upper processing area.

[0033] Furthermore, the breathable membrane 8 is fixed to the breathable support 7 by hot-press welding, forming a tight bond that can withstand greater pressure and improve structural stability. At the same time, hot-press welding can form a continuous and seamless weld edge, preventing liquid medicine or other liquids from seeping into the space between the breathable membrane and the breathable support.

[0034] In this embodiment, the breathable membrane 8 is a PTFE composite membrane. The PTFE composite membrane has a high and uniform porosity, allowing gas molecules to pass smoothly through the membrane layer, thus exhibiting extremely high breathability. The PTFE composite membrane has a pore size of 0.16~0.28μm, a diameter of 7~12mm, a thickness of 0.12~0.26mm, and an air permeability of 480~550ml / cm².min.

[0035] Preferably, the breathable membrane has a pore size of 0.22 μm, a diameter of 9 mm, a thickness of 0.2 mm, and an air permeability of 500 ml / cm².min.

[0036] Secondly, there is a filtration unit, which is located in the lower processing area 6. It includes a filter support 9 and a filter membrane 10 installed on the filter support 9. The filter membrane 10 is used to filter and stop the liquid from flowing.

[0037] Furthermore, the filter membrane 10 is fixed to the filter support by hot-press welding, which improves the overall structural strength and stability. Hot-press welding can form a continuous and seamless weld edge, effectively preventing liquid medicine or other fluids from seeping between the filter membrane and the filter support through tiny gaps. It has excellent sealing performance and ensures the purity and efficiency of filtration.

[0038] In this embodiment, the filter membrane 10 is a PES membrane, which is a microporous membrane with a relatively uniform pore size distribution. The pore size can be precisely controlled and customized, making it suitable for particles of different sizes. It also has a relatively high porosity, which improves the liquid filtration efficiency.

[0039] In addition, the PES membrane itself has bubble point pressure, which prevents the backflow of the medicine after it is used up, thus achieving the function of stopping the flow of the medicine.

[0040] Furthermore, the PES membrane has a pore size of 6~8μm, a diameter of 18~22mm, and a thickness of 0.12~0.26mm.

[0041] Preferably, the filter membrane 10 has a pore size of 8μm, a diameter of 21mm, and a thickness of 0.2mm.

[0042] In this embodiment, both the breathable support 7 and the filter support 9 are arranged in a ring shape, and there is a height difference between the breathable support 7 and the filter support 9, which spatially separates the exhaust unit and the filter unit.

[0043] The height difference design optimizes the working efficiency of the breathable membrane, allowing it to better avoid direct contact between the liquid filter and the exhaust process. In practical applications, the filter is usually suspended, with the waterproof and breathable membrane positioned relatively high. During the filtration process, air bubbles generated will naturally rise and be smoothly discharged through the waterproof and breathable membrane. This design ensures smooth system operation and efficient filtration.

[0044] Preferably, the breathable support 7 is positioned higher than the filter support 9, and the height difference between the breathable support 7 and the filter support 9 is 2-6 mm.

[0045] This embodiment also includes a vent 11, which is located on the side of the lower cover 2 near the upper processing area 5. The vent 11 can communicate with the outside atmosphere, thereby automatically discharging the air bubbles inside the filter to the atmosphere. As the liquid flows, the air bubbles will accumulate at the top of the filter and be automatically released through the vent, avoiding pressure buildup and ensuring the smooth operation of the filtration process.

[0046] According to the above structure, the breathable membrane 8 and the filter membrane 10 work together to divide the internal space of the main cover into an inlet chamber and an outlet chamber. The medicine to be filtered flows in from the inlet pipe and slowly fills the entire inlet chamber. The liquid that comes into contact with the filter membrane 10 seeps out through the PES membrane and flows into the outlet chamber. The PES membrane itself has bubble point pressure, which prevents the backflow of medicine after it is used up, thus achieving the function of stopping the flow. During the infusion process, air bubbles may enter. These air bubbles tend to float at the top of the main cover. The top of the main cover has a PTFE waterproof and breathable membrane to facilitate the expulsion of air bubbles.

[0047] The working process of this automatic air venting and liquid-stopping filter is as follows:

[0048] In actual use, the filter is in a suspended state. The inlet pipe 3 of the top cover 1 is connected to the liquid source. The liquid to be filtered flows in from the inlet pipe 3 of the top cover 1. As the liquid flows in, the inlet chamber is gradually filled. During the infusion process, air bubbles will enter. The air bubbles often float on the top of the main cover. After passing through the PTFE waterproof and breathable membrane 8, the air bubbles are discharged into the atmosphere through the exhaust hole 11.

[0049] The liquid that comes into contact with the filter membrane 10 at the lower end of the main cover begins to be filtered through the PES membrane. Since PES is a microporous membrane with a pore size of 6~8μm, it can filter all particles larger than 6~8μm. The filtered clean liquid flows into the liquid outlet chamber and is then discharged through the liquid outlet pipe 4.

[0050] When the medication is completely used up, the liquid level in the inlet chamber drops, and no longer applies pressure to the PES membrane. At this time, the bubble point pressure of the PES membrane itself comes into play, preventing the medication from flowing back, thus stopping the flow and preventing backflow of blood.

[0051] The beneficial effects of this automatic air venting and liquid-stopping filter are:

[0052] Preventing air embolism: The air-permeable membrane and vents effectively expel air bubbles floating on the top, reducing the risk of air embolism;

[0053] Improved filtration efficiency: Filtration membranes can remove tiny particles and potential microorganisms from liquids, ensuring the purity of the liquid and guaranteeing that the medications or fluids received by patients are clean, thus reducing the possibility of infection;

[0054] Improved operational efficiency: It can automatically stop the infusion, prevent backflow of blood, and reduce the need for medical staff to manually vent air, making the entire infusion process simpler and more efficient, saving time and manpower.

[0055] 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 using 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. An automatic venting and liquid-stopping filter, characterized in that, include: The main body, including the lower cover and the upper cover that is connected to the lower cover, is pear-shaped and has a corresponding upper processing area and a lower processing area. An exhaust unit, located in the upper processing area, includes a breathable support and a breathable membrane mounted on the breathable support. The breathable membrane is used to exhaust air bubbles floating in the upper processing area. A filtration unit, located in the lower processing area, includes a filter support and a filter membrane mounted on the filter support. The filter membrane is a PES membrane, which is used to filter and stop the liquid from flowing into the drug solution. Both the breathable support and the filter support are arranged in a ring shape, and there is a height difference between the breathable support and the filter support, which spatially separates the exhaust unit and the filter unit. The breathable membrane is fixed to the breathable support by hot-press welding, and the filter membrane is fixed to the filter support by hot-press welding.

2. The automatic venting and liquid-stopping filter according to claim 1, characterized in that, The upper cover is provided with a liquid inlet pipe, the lower cover is provided with a liquid outlet pipe, and the breathable membrane and the filter membrane work together to divide the internal space of the main cover into a liquid inlet chamber and a liquid outlet chamber.

3. The automatic venting and liquid-stopping filter according to claim 1, characterized in that, It also includes an exhaust port located on the side of the lower cover near the upper processing area, which is able to communicate with the outside atmosphere.

4. The automatic venting and liquid-stopping filter according to claim 1, characterized in that, The breathable support is positioned higher than the filter support, and the height difference between the breathable support and the filter support is 2-6mm.

5. The automatic venting and liquid-stopping filter according to claim 1, characterized in that, The breathable membrane is a PTFE composite membrane with a pore size of 0.16~0.28μm, a diameter of 7~12mm, a thickness of 0.12~0.26mm, and an air permeability of 480~550ml / cm².min.

6. The automatic venting and liquid-stopping filter according to claim 5, characterized in that, The breathable membrane has a pore size of 0.22μm, a diameter of 9mm, a thickness of 0.2mm, and an air permeability of 500ml / cm².min.

7. The automatic venting and liquid-stopping filter according to claim 1, characterized in that, The filter membrane has a pore size of 6~8μm, a diameter of 18~22mm, and a thickness of 0.12~0.26mm.

8. The automatic venting and liquid-stopping filter according to claim 7, characterized in that, The filter membrane has a pore size of 8μm, a diameter of 21mm, and a thickness of 0.2mm.

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