CN201324412Y

CN201324412Y - Self-exhausting type filter for infusion

Info

Publication number: CN201324412Y
Application number: CNU2008201701831U
Authority: CN
Inventors: 李文凯; 杜佩金; 孟大鹏
Original assignee: Hangzhou Anow Microfiltration Co Ltd
Current assignee: Hangzhou Anow Microfiltration Co Ltd
Priority date: 2008-12-11
Filing date: 2008-12-11
Publication date: 2009-10-14
Anticipated expiration: 2018-12-11

Abstract

The utility model discloses a self-exhausting type filter for infusion, which comprises a lower bottom, an upper cover, a discharge hole, hydrophobic filtering film, a compression ring and hydrophilic filtering film, wherein the hydrophobic filtering film is glued on the peripheral edge of the upper cover in a compression mode through hot melting, and liquid inlets, liquid inlet nozzles, liquid outlet nozzles and liquid outlets are arranged on both ends of the lower bottom. The filter is characterized in that a liquid collecting groove is arranged on the middle portion of the inner bottom surface of the filter in the lower bottom, a plurality of supporting ribs which are projected in interval are arranged on both sides of the groove, the lower bottom is connected with the upper cover in a compression mode through hot melting, the hydrophilic filtering film of the filter is simultaneously connected on the lower bottom in a compression mode through holt melting, a liquid storing chamber is divided into an upper and a lower portions, and covers the liquid collecting groove. Since the discharge hole is added, the liquid collecting groove and the supporting ribs which are projected in interval are arranged, the soakage of liquid film is sufficient, the generation of dead angles and air entrapment is prevented, and the difficulty of the air entrapment on a liquid inlet surface and a liquid outlet surface during the use process of an infusion filter or a pressure infusion pump, and the filter is widely used for clinical applying infusion and the filtering of injection liquid.

Description

From exhaust transfusion filter

Technical field

This utility model relates to medical apparatus, and specifically disposable use precision filter infusion set filters a kind of auxiliary device of usefulness to the microgranule in the liquid medicine injection invest garter when venous transfusion before.

Background technology

Play the garter transfusion, the particulate matter external world, that produce in the operation may be brought in the medicinal liquid, inadvertently in the human body blood vessel is brought in transfusion into, having does not into have, and has just become secular latency harm, with blood operation, wait for an opportunity to cause all size disease, hidden danger is very big.These people have progressively been recognized.The corresponding structure product also releases one after another, adopts.Calendar year 2001, JIUYUE last time issued the standard GB 18458-2001 of disposable use precision filter infusion set on the 18th.

Chinese patent 200320106827.8 and 200620047345.3 discloses two kinds " liquid medicine filters ", has all adopted the box-like structure of miniaturization, and this component utilizes hydrophobicity filter membrane packing steam vent, filters institute's loading liquid with hydrophilic filter membrane, draws the input human body.On above-mentioned standard base, added steam vent, cover on the latter and added the discharge orifice, all narrow because of gap under its film, filter membrane soaks into insufficient, and easily produce the dead angle, be detained bubble, and the very difficult technical problem of discharging of fluid end face bubble, its structure still need be improved.Adopt the hydrophilic filter membrane in 2 μ m or 5 μ m apertures thus again, the particulate matter that filtering 2 μ m are above or 5 μ m are above will be enough to inspirer information for vast transfusion person brings.

Summary of the invention

The purpose of this utility model provides a kind of improved from exhaust transfusion structure of filter technical scheme.Inhomogeneous to solve existing filter feed liquor, it is insufficient to cause filter membrane to soak into, and easily produces the dead angle, is detained bubble, down to the technical problem that is difficult to discharge into and out of liquid level remained gas bubble.

This utility model adopts following technical scheme:

Of the present utility model from exhaust transfusion filter, comprise go to the bottom, loam cake, discharge orifice, hydrophobicity filter membrane, pressure ring and hydrophilic filter membrane, hydrophobicity filter membrane hot melt is pressed and is bonded on the steam vent of loam cake, the two ends of going to the bottom are provided with inlet, liquid inlet and fluid mouth, liquid outlet, in it is characterized in that going to the bottom, the middle part of its inner bottom surface is provided with collecting tank, and these groove both sides are provided with the brace rod that a plurality of interruptions are protruded; Go to the bottom and loam cake is a heat smelting crimp connection, its hydrophilic filter membrane heat smelting crimp connection simultaneously has been divided into upper and lower two parts with fluid storage compartment, and has covered collecting tank on going to the bottom.

The steam vent that covers on described is located at the one side or the both sides at loam cake center.

Described correspondence go to the bottom liquid inlet and fluid mouth position last decorative cover along on be equipped with the discharge orifice.

Described collecting tank takes the shape of the letter U, straight-through liquid outlet.

The good effect that the utlity model has:

Owing to adding and having increased the discharge orifice, liquid film is soaked into fully, prevent to produce the dead angle and be detained bubble; The steam vent that is provided with is more convenient for discharging the air in the medicinal liquid, realizes safe infusion; Be provided with collecting tank and be interrupted outstanding brace rod, solved a difficult problem of steeping into and out of the liquid level remained gas in filter for transfusion or the use of pressure infusion pump.Be widely used in the filtration of clinical dispenser transfusion and injection.Test shows, meets the designing requirement of smooth transfusion fully.

Precise structure is reasonable, the manufacturing process maturation, and steady quality, reliable, easy to use, up to specificationization needs, and is convenient to produce in batches.

Description of drawings

Fig. 1 is from exhaust transfusion structure of filter schematic diagram.

Fig. 2 be filter go to the bottom interior to view.

Fig. 3 is the C-C cutaway view of Fig. 2.

Fig. 4 is Fig. 1 filter cover P position dextrad view.

Fig. 5 is the loam cake sketch map that steam vent splits.

Fig. 6 is the prior art constructions sketch map.

Wherein:

1, goes to the bottom; 2, loam cake; 3, discharge orifice; 4, pressure ring; 5, steam vent; 6, hydrophobicity filter membrane; 7, go up the decorative cover edge; 8, following edge, foundation ring; 9, fluid mouth; 10, hydrophilic filter membrane; 11, brace rod; 12, collecting tank; 13, liquid inlet.

The specific embodiment

1,2,3 the utility model is described in further detail in conjunction with the accompanying drawings, and protection domain of the present utility model is described.

Fig. 1 is from the embodiment accompanying drawing of exhaust transfusion with filter.It comprises go to the bottom 1, loam cake 2, steam vent 5, discharge orifice 3, hydrophobicity filter membrane 6, pressure ring 4 and hydrophilic filter membrane 10, hydrophobicity filter membrane 6 is pressed by pressure ring 4 hot melts and is bonded on the steam vent 5 of loam cake, 1 two ends of going to the bottom are provided with inlet a, liquid inlet 13 and fluid mouth 9, liquid outlet g, it is characterized in that going to the bottom in 1, the middle part of its inner bottom surface is provided with collecting tank 12, and these groove both sides are provided with the brace rod 11 that a plurality of interruptions are protruded; Go to the bottom and loam cake is a heat smelting crimp connection, its hydrophilic filter membrane 10 is used for filtering 2 μ m～5 μ m microgranules, simultaneously heat smelting crimp connection go to the bottom 1 and the circle of loam cake 2 along 7 on, fluid storage compartment is separated into upper and lower two parts, and covers collecting tank 12.Collecting tank 12 is roomy U-shaped, straight-through liquid outlet g.The 8th, edge, following foundation ring, bead is loam cake and sealing-in place of going to the bottom.

On the illustrated loam cake 2 the last decorative cover of corresponding liquid inlet 13 and fluid mouth 9 along on be equipped with the discharge orifice.

Inner bottom surface is provided with the brace rod that be interrupted to protrude and is used to support rete, formed gap network unobstructed under the film simultaneously, ensured circulation, and medicinal liquid is pooled in the collecting tank 12 smoothly.

Wherein, owing to added, increased the hole area of discharge orifice.Liquid film is soaked into fully, prevent to produce the dead angle and be detained bubble; Be provided with collecting tank, changing brace rod is intermittent configuration, uses the blockage problem that liquid level can not be detained bubble.

Among the figure, the periphery of the steam vent 5 of loam cake 2 also is provided with steam vent.And be located at the one side at loam cake center.

In the following bottom structure of Fig. 2,3 expressions, the 12nd, collecting tank, the 9th, fluid mouth, the 13rd, liquid inlet.Brace rod 11 is the brace rod that a plurality of interruptions are protruded, and is boat-shaped.These are interrupted the brace rod 11 that protrudes can arrange by the array network general layout, and its construction profile comprises short strip shape, round table-like or similar boss shape.

Fig. 4 is Fig. 1 filter cover P position dextrad view, and hydrophilic filter membrane 10 and six discharge orifices 3 are wherein arranged.

Loam cake shown in Figure 5, top steam vent 5 is located at the both sides at loam cake center for diplopore splits.Steam vent more helps the discharge of gas near the discharge orifice.

Fig. 6 is the structural representation of prior art Chinese patent 200320106827.8 disclosed liquid medicine filters.What its adopted is through type influent stream road, is circulated not smooth by the obstruction of delay bubble easily when filtered solution passes through runner very narrow under the film.

Its work process is as follows:

Medicinal liquid enters, makes progress through the b hole from left side inlet a, arrives in the c chamber, enters the epicoele e at fluid storage compartment place again from the discharge orifice of d.If contain gas in the medicinal liquid, then the bubble of gas can be discharged from steam vent 5, medicinal liquid is through the filtration of hydrophilic filter membrane 10, this film can be with the microgranule filtering greater than 2 μ m or 5 μ m, this hydrophilic filter membrane 10 has the function that stops gas penetration simultaneously, so gas is blocked among the fluid storage compartment epicoele e, will discharge from steam vent 5, and filterable medicinal liquid enters behind the fluid storage compartment cavity of resorption f along collecting tank 12, flows out to liquid outlet g.Air among the fluid storage compartment cavity of resorption f is done emptying through syringe needle and is disposed before injection operation.

Claims

1, a kind of from exhaust transfusion filter, comprise go to the bottom (1), loam cake (2), steam vent (5), discharge orifice (3), hydrophobicity filter membrane (6), pressure ring (4) and hydrophilic filter membrane (10), hydrophobicity filter membrane (6) is pressed by pressure ring (4) hot melt and is bonded on the steam vent of loam cake (2), (1) two ends of going to the bottom are provided with inlet (a), liquid inlet (13) and fluid mouth (9), liquid outlet (g), in it is characterized in that going to the bottom, the middle part of its inner bottom surface is provided with collecting tank, and these groove both sides are provided with the brace rod (11) that a plurality of interruptions are protruded; Go to the bottom (1) and loam cake (2) is heat smelting crimp connection, and its hydrophilic filter membrane (10) heat smelting crimp connection simultaneously has been divided into upper and lower two parts with fluid storage compartment, and has covered collecting tank (12) on go to the bottom (1).

2, the according to claim 1 transfusion from exhaust used filter, it is characterized in that the steam vent (5) on the described loam cake (2) is located at the one side or the both sides at loam cake center.

3, according to claim 1ly use filter, it is characterized in that correspondence is gone to the bottom to be equipped with discharge orifice (3) on the last decorative cover edge (7) at liquid inlet (13) and fluid mouth (9) position from exhaust transfusion.

4, the according to claim 1 transfusion from exhaust used filter, it is characterized in that the collecting tank (12) on said the going to the bottom (1) takes the shape of the letter U, straight-through liquid outlet (g).

5, the according to claim 1 transfusion from exhaust used filter, it is characterized in that the brace rod (11) of said interruption protrusion is arranged by the array network general layout, and its construction profile comprises short strip shape, round table-like or similar boss shape.