CN202086884U

CN202086884U - Parallel type precision filter for liquid medicine

Info

Publication number: CN202086884U
Application number: CN2011201065698U
Authority: CN
Inventors: 林景春
Original assignee: Individual
Current assignee: Individual
Priority date: 2011-04-11
Filing date: 2011-04-11
Publication date: 2011-12-28
Anticipated expiration: 2021-04-11

Abstract

Provided is a parallel type precision filter for liquid medicine. A plurality of filtering cavities are formed by combining an upper cover provided with a plurality of parallel grooves and a lower cover provided with a plurality of parallel grooves. A filtering membrane with membrane aperture <= 5mums is arranged in the middle of each filtering cavity. Two ends of each filtering cavity are respectively communicated with a main liquid inlet tube and a main liquid outlet tube through communication tubes. The parallel type precision filter for the liquid medicine is characterized in that each filtering cavity is communicated with the main liquid inlet tube and the main liquid outlet tube through the communication tubes in parallel. When the liquid medicine is infused, the area of the filtering membrane capable of filtering particles simultaneously is a sum of the area of the filtering membrane with membrane aperture <= 5mum of each filtering cavity.

Description

Parallel connection type medicinal liquid accurate filter

Technical field

This utility model belongs to a kind of medical apparatus and instruments, especially the parallel connection type medicinal liquid accurate filter that uses when secondary filter infusion medicinal liquid.

Background technology

The filter membrane aperture of using during secondary filter infusion medicinal liquid≤5 μ m, flow rate of liquid is slower, so for satisfying the requirement of clinical infusion medicinal liquid flow velocity, just need be than larger area filter membrane, and at present during secondary filter infusion medicinal liquid, the medicinal liquid accurate filter that uses has only a filter chamber, required for being provided with than larger area filter membrane, the volume of filter chamber just needs bigger, cause liquid to be difficult for filling with fast filter chamber, air is difficult for discharging in the filter chamber, needs to be provided with the exhaust passage that is coated with hydrophobic exhaust membrane, the interior air of filter chamber is discharged easily, so not only increase manufacturing cost and difficulty, and because of the material of hydrophobic exhaust membrane, the low-energy surface of polytetrafluoroethylene (PTFE), adhesion is poor, difficult bonding characteristic makes the bonding strength of it and medicinal liquid accurate filter housing not enough, causes when infusion, particularly when higher pressure infusion of need or long-time high capacity infusion medicinal liquid, be easy to generate the medicinal liquid seepage at the position, exhaust passage.

Summary of the invention

Has only a filter chamber for overcoming present medicinal liquid accurate filter, the requirement of satisfying clinical infusion medicinal liquid flow velocity and filtering microgranule, the filter membrane of needed aperture≤5 μ m, all only establish in the filter chamber, cause the filter chamber volume too big, liquid is difficult for filling with fast filter chamber, air is difficult to discharge in the filter chamber, the exhaust passage that covers hydrophobic exhaust membrane need be set, the interior air of filter chamber is discharged easily, increase manufacturing cost and difficulty, and because of the material of hydrophobic exhaust membrane, the low-energy surface of polytetrafluoroethylene (PTFE), adhesion is poor, difficult bonding characteristic, make the bonding strength of it and filter housings not enough, cause when infusion, particularly when higher pressure infusion of need or long-time large capacity transfusion, be easy to generate the defective of medicinal liquid seepage at the position, exhaust passage.

This utility model parallel connection type medicinal liquid accurate filter, be that lower cover by the loam cake that is provided with a plurality of grooves arranged side by side and a plurality of grooves arranged side by side combines, form a plurality of filter chambers, and at the middle filter membrane of establishing membrane aperture≤5 μ m of each filter chamber, the two ends of each filter chamber are communicated with a main feed tube, a main drain pipe through communicating pipe respectively and form, and it is characterized in that: a plurality of filter chambers are through communicating pipe and a main feed tube, in parallel a connection of main drain pipe.

The number of the groove number of described loam cake, the groove number of lower cover, filter chamber equates, number is a plurality of, can set number according to needs, as 2,3 or more, but be at least 2, each groove volume size should suit to form, and easily fills with medicinal liquid, air-out and need not to be provided with the filter chamber of exhaust passage easily fast.

The two ends of described each filter chamber all have a communicating pipe respectively at least, are communicated with main feed tube, main drain pipe respectively.

Described main feed tube, main drain pipe number all are one.

During the infusion medicinal liquid, medicinal liquid is by through communicating pipe a plurality of medicinal liquid, the air-outs and need not to be provided with the filter chamber of exhaust passage easily easily filled with fast that are communicated with in parallel, filtering microgranule simultaneously, the filter membrane area of filtering microgranule is the filter membrane area sum that is provided with in the middle of each filter chamber simultaneously.This utility model be by, required large tracts of land filter membrane, divide and to be located at a plurality of medicinal liquid, air-outs and need not to be provided with in the middle of the filter chamber of exhaust passage easily easily filled with fast, each filter chamber is again through the communicating pipe technical scheme that is communicated with in parallel, it is big because of volume to overcome existing medicinal liquid accurate filter, cause air to be difficult for discharging, and the defective of exhaust passage need be set.

Description of drawings

Fig. 1 is a parallel connection type medicinal liquid accurate filter basic block diagram of the present utility model

Floor map with operation principle.

Among Fig. 1 (1)--loam cake (2)--lower cover (3)--membrane aperture≤5 μ m's

--communicating pipe (5)--filter chamber (6)--, the master went out filter membrane (4)

Liquid pipe (7)--main feed tube (8)--groove

The specific embodiment

Below in conjunction with drawings and embodiments, the disposable use precision filter infusion set of this utility model is further specified.

As Fig. 1, parallel connection type medicinal liquid accurate filter of the present utility model, be by the loam cake (1) that is provided with a plurality of grooves arranged side by side (8), lower cover (2) combination of a plurality of grooves arranged side by side (8), form a plurality of filter chambers (5), the groove of loam cake (8) number, the groove of lower cover (8) number, the number of the filter chamber (5) that forms equates, establish the filter membrane (3) of membrane aperture≤5 μ m in the middle of each filter chamber (5), the two ends of each filter chamber (5) are through communicating pipe (4), be communicated with main feed tube (7) respectively, main drain pipe (6), it is characterized in that: each filter chamber (5) and main feed tube (7), main drain pipe (6) is through in parallel connection of communicating pipe (4).During the infusion medicinal liquid, enter main feed tube (7) medicinal liquid, each filter chamber (5) that links to each other that flows into respectively communicating pipe (4) via each filter chamber (5) one end, behind filter membrane (3) the filtering microgranule of membrane aperture≤5 μ m, via the communicating pipe (4) of each filter chamber (5) other end introducing main drain pipe (6).During infused drug, medicine is by through communicating pipe (4) a plurality of filter chambers (5) that are communicated with in parallel filtering microgranule simultaneously.Effective filter membrane area of filtering microgranule in the time of when parallel connection type medicinal liquid accurate filter of the present utility model is worked is membrane aperture≤5 μ m filter membrane (3) the area sums that are provided with in the middle of each filter chamber (5).

Claims

1. parallel connection type medicinal liquid accurate filter, be to combine by loam cake that is provided with a plurality of grooves arranged side by side and the lower cover that is provided with the equal groove arranged side by side of number, form a plurality of filter chambers, and at the middle filter membrane of establishing membrane aperture≤5 μ m of each filter chamber, the two ends of each filter chamber are communicated with a main feed tube, a main drain pipe through communicating pipe respectively and form, and it is characterized in that: a plurality of filter chambers are through communicating pipe and a main feed tube, in parallel a connection of main drain pipe.

2. parallel connection type medicinal liquid accurate filter according to claim 1, it is characterized in that: the groove number of described loam cake, the groove number of lower cover, filter chamber number equate, number is a plurality of, can set number according to needs, as 2,3 or more, but be at least 2, each groove volume size should suit to form, and easily fills with medicinal liquid, air-out and need not to be provided with the filter chamber of exhaust passage easily fast.