Medical liquid medicine filter with folding filter membrane

Abstract

The utility model discloses a medical liquid medicine filter with a folded filter membrane, which relates to the technical field of filters and comprises a filter body arranged in a drip chamber of an infusion tube. The filter body comprises an upper cover plate and a lower cover plate, a plurality of filter membranes are arranged at the edge between the upper cover plate and the lower cover plate, the plurality of filter membranes are circumferentially arranged, two ends of each filter membrane are hermetically connected onto the upper cover plate and the lower cover plate respectively, two sides of each filter membrane are mutually connected with the adjacent filter membrane, and the filter membrane is arranged between the upper cover plate and the lower cover plate. The upper cover plate and the lower cover plate form a cylindrical filter element; the filter membrane adopts a folding structure and is provided with a plurality of folding layers. The medical liquid medicine filter with the folding filter membrane has the advantages of being simple in structure, good in filtering effect, long in service life and the like. In addition, the drip chamber is used as a filter element shell, so that the infusion apparatus is more convenient and flexible to use.

Description

Technical Field

[0001] The utility model relates to the technical field of filters, in particular to a medical liquid filter with a folded filter membrane. Background Art

[0002] In the medical field, filters are widely used during infusions to ensure the purity and safety of medications. Several products for filtering medications are currently available on the market. However, to save material and space, these products are often flat-plate designs, making them prone to clogging during filtration.

[0003] Flat-plate filters mostly use ultrasonically pressed shells, with the filter membrane sandwiched between two shells and the membrane boundary pressed together by extrusion. During clinical use, the ultrasonic boundary is not completely closed, and there is a certain risk for filters with filtration accuracy requirements below 1.2μm.

[0004] Some companies are currently using a filter membrane welded to the bottom of the drip chamber to replace the filter. While this approach reduces the number of infusion set components, it changes the filtration method from lateral flow to direct flow, which is more prone to clogging. Furthermore, the filter membrane area is further reduced, making it less suitable for clinical use. Utility Model Content

[0005] The purpose of the present utility model is to provide a medical liquid filter with a folded filter membrane to solve the problems raised in the above background technology.

[0006] To achieve the above objectives, the present invention provides the following technical solutions:

[0007] A medical liquid filter with a pleated filter membrane comprises a filter body, which is arranged in a drip funnel of an infusion tube; the filter body comprises an upper cover plate and a lower cover plate, and a plurality of filter membranes are provided at the edge between the upper cover plate and the lower cover plate, and the plurality of filter membranes are arranged in a circumferential manner, with the two ends of the filter membranes respectively sealedly connected to the upper cover plate and the lower cover plate, and the two sides of the filter membranes are interconnected with adjacent filter membranes, so that the upper cover plate and the lower cover plate form a cylindrical filter core; the filter membrane adopts a pleated structure and has multiple pleated layers.

[0008] As a further improvement of the above solution, the upper end of the upper cover is connected to a liquid inlet pipe, and the lower end of the liquid inlet pipe passes through the upper cover. During installation, the liquid inlet pipe is inserted into the infusion tube at the upper end of the infusion tube drip bucket and bonded.

[0009] As a further improvement of the above solution, the upper end and the lower end of the filter membrane are sealed by hot-melt adhesive material or adhesive bonding to form a pleated filter element.

[0010] As a further improvement of the above solution, the hot melt adhesive material is polyamide hot melt adhesive or PVA hot melt adhesive.

[0011] As a further improvement of the above solution, the material of the filter membrane is one of polyethersulfone, nylon, polypropylene, polyvinylidene fluoride, and polytetrafluoroethylene.

[0012] As a further improvement of the above solution, a polyester lining may be used as a protective layer on the outside of the pleated filter element.

[0013] Compared with the prior art, the beneficial effects of the present invention are:

[0014] The utility model provides a medical liquid filter with a folded filter membrane, which has the advantages of simple structure, good filtering effect, long service life, etc. In addition, the use of a drip funnel as the filter element shell makes the infusion set more convenient and flexible to use. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a schematic diagram of the structure of a medical liquid filter with a pleated filter membrane.

[0016] Figure 2 The figure is a schematic diagram of the structure of the filter body in a medical liquid filter with a pleated filter membrane.

[0017] Figure 3 This is a partial schematic diagram of the filter body in a medical liquid filter with a pleated filter membrane.

[0018] Figure 4 The figure is a partial top view of the filter body of a medical liquid filter with a pleated filter membrane.

[0019] In the figure: 1, drip bucket of infusion tube; 2, filter body; 21, upper cover plate; 22, lower cover plate; 23, filter membrane; 24, liquid inlet pipe. DETAILED DESCRIPTION

[0020] The technical solution of this patent is further described in detail below in conjunction with specific implementation methods.

[0021] Example, see Figures 1-4A medical liquid filter with a pleated filter membrane includes a filter body 2, which is arranged in the drip bucket 1 of the infusion tube, reducing the components of the infusion set and making the use of the infusion set lighter and more convenient; the filter body 2 includes an upper cover plate 21 and a lower cover plate 22, and a plurality of filter membranes 23 are provided at the edge between the upper cover plate 21 and the lower cover plate 22, and the plurality of filter membranes 23 are arranged in a circumferential manner, and the upper and lower ends of the filter membranes 23 are respectively sealed and connected to the upper cover plate 21 and the lower cover plate 22, and the two sides of the filter membrane 23 are interconnected with the adjacent filter membranes 23, so that the upper cover plate 21 and the lower cover plate 22 form a cylindrical filter core; the filter membrane 23 adopts a pleated structure and has multiple pleated layers. Each pleated layer includes a filter material for capturing and filtering particulate matter and impurities in the liquid medicine. The design of the pleated structure increases the surface area of ​​the filter membrane, improves the filtration efficiency, and extends the service life.

[0022] The upper end of the upper cover plate 21 is connected to a liquid inlet pipe 24 , and the lower end of the liquid inlet pipe 24 passes through the upper cover plate 21 . During installation, the liquid inlet pipe 24 is inserted into the infusion tube at the upper end of the infusion tube drip bucket 1 and bonded.

[0023] The upper and lower ends of the filter membrane 23 are sealed by hot-melt adhesive material or adhesive bonding to form a folded filter element.

[0024] The hot melt adhesive material is polyamide hot melt adhesive or PVA hot melt adhesive. In this embodiment, polyamide hot melt adhesive is selected.

[0025] The material of the filter membrane 23 is one of polyethersulfone, nylon, polypropylene, polyvinylidene fluoride, and polytetrafluoroethylene. In this embodiment, polyethersulfone is selected.

[0026] In another embodiment, a polyester lining may be used as a protective layer on the outside of the pleated filter element.

[0027] Working principle of this utility model:

[0028] During use, the liquid medicine enters the infusion tube from the infusion bottle and then flows from the infusion tube to the dripping funnel. When it reaches the dripping funnel, it first enters the filter core through the liquid inlet tube 24, is filtered by the folded filter membrane 23 around the filter core, then flows into the dripping funnel and flows along the infusion tube toward the infusion needle. The folded structure of the filter membrane 23 increases the surface area of ​​the filter membrane, improves the filtration efficiency, and extends the service life.

[0029] The utility model has the advantages of simple structure, good filtering effect, long service life, etc. In addition, the use of the drip bucket as the filter element shell makes the infusion set more convenient and flexible to use.

Claims

1. A medical liquid filter with a pleated filter membrane, characterized in that: The invention comprises a filter body (2), wherein the filter body (2) is arranged in a drip bucket (1) of an infusion tube; the filter body (2) comprises an upper cover plate (21) and a lower cover plate (22); a plurality of filter membranes (23) are provided at the edge between the upper cover plate (21) and the lower cover plate (22), and the plurality of filter membranes (23) are arranged in a circumferential manner; the two ends of the filter membrane (23) are respectively sealed and connected to the upper cover plate (21) and the lower cover plate (22); the two sides of the filter membrane (23) are connected to adjacent filter membranes (23), so that the upper cover plate (21) and the lower cover plate (22) form a cylindrical filter core; the filter membrane (23) adopts a folded structure and has multiple folded layers.

2. A medical liquid filter with a pleated filter membrane according to claim 1, characterized in that: The upper end of the upper cover plate (21) is connected to a liquid inlet pipe (24), and the lower end of the liquid inlet pipe (24) passes through the upper cover plate (21). During installation, the liquid inlet pipe (24) is inserted into the infusion pipe at the upper end of the infusion pipe drip bucket (1) and bonded.

3. The medical liquid filter with a pleated filter membrane according to claim 1, characterized in that: The upper end and the lower end of the filter membrane (23) are sealed by hot-melt adhesive material or adhesive bonding to form a folded filter element.

4. The medical liquid filter with a pleated filter membrane according to claim 3, characterized in that: The hot melt adhesive material is polyamide hot melt adhesive or PVA hot melt adhesive.

5. The medical liquid filter with pleated filter membrane according to claim 4, characterized in that: The material of the filter membrane (23) is one of polyethersulfone, nylon, polypropylene, polyvinylidene fluoride, and polytetrafluoroethylene.

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