CN219127761U

CN219127761U - Medical liquid unidirectional filter

Info

Publication number: CN219127761U
Application number: CN202223599446.XU
Authority: CN
Inventors: 杨干; 梁栋科; 吴德华
Original assignee: Zhuhai Derui Medical Equipment Co ltd
Current assignee: Zhuhai Derui Medical Equipment Co ltd
Priority date: 2022-12-29
Filing date: 2022-12-29
Publication date: 2023-06-06
Anticipated expiration: 2032-12-29

Abstract

The utility model discloses a medical liquid unidirectional filter, which belongs to the field of medical appliances, and comprises a first shell; the first shell is arranged on the second shell; the interface comprises a first interface and a second interface, the first interface is arranged on the second shell, and the second interface is arranged on the second shell; the filtering membrane is arranged between the first shell and the second shell, the first cavity is formed by enclosing the filtering membrane and the first shell, the second cavity is formed by enclosing the filtering membrane and the second shell, the first cavity is communicated with the first interface, the second cavity is communicated with the second interface, and the filtering membrane is used for preventing liquid from reversely flowing. The medical liquid unidirectional filter utilizes the characteristics of the filtering membrane, so that the medical liquid can only flow unidirectionally in the treatment input process, the situation that the medical liquid flows reversely in the treatment process is prevented, and the filtering effect is enhanced.

Description

Medical liquid unidirectional filter

Technical Field

The utility model relates to the field of medical instruments, in particular to a medical liquid unidirectional filter.

Background

Medical liquid filters are generally used in syringes, and in the medical treatment process, medical liquid of a part of the syringes needs to flow from one end of the filter to the other end, wherein the flowing direction of the liquid is unidirectional flowing, so that impurities are filtered, and meanwhile, the medical liquid at the other end needs to be prevented from flowing out reversely.

The existing medical liquid filter mainly prevents impurities from entering a human body when the syringe is used for inputting treatment, and the situation that medical liquid flows reversely in the process of inputting treatment is difficult to be avoided, so that the treatment effect is poor.

Disclosure of Invention

The utility model aims to at least solve one of the technical problems in the prior art, and therefore, the utility model provides a medical liquid unidirectional filter which can enable medical liquid to flow unidirectionally in the treatment process and improve the situation that the medical liquid flows out reversely in the process of inputting treatment.

According to an embodiment of the utility model, a medical liquid unidirectional filter comprises a first shell; the first shell is arranged on the second shell; the interface comprises a first interface and a second interface, the first interface is arranged on the second shell, and the second interface is arranged on the second shell; the filtering membrane is arranged between the first shell and the second shell, the first cavity is formed by enclosing the filtering membrane and the first shell, the second cavity is formed by enclosing the filtering membrane and the second shell, the first cavity is communicated with the first interface, the second cavity is communicated with the second interface, and the filtering membrane is used for preventing liquid from reversely flowing.

The medical liquid unidirectional filter provided by the embodiment of the utility model has at least the following beneficial effects: by utilizing the characteristics of the filtering membrane, the medical liquid can only flow unidirectionally in the treatment input process, the situation that the medical liquid flows reversely in the treatment process is prevented, and the accuracy of the unidirectional medical liquid filter is improved by selecting different filtering membranes according to actual situations, so that the filtering effect is enhanced.

According to some embodiments of the utility model, the first housing has a first compression portion and the second housing has a second compression portion, the filter membrane being disposed between the first compression portion and the second compression portion, the first compression portion and the second compression portion being configured to compress the filter membrane.

According to some embodiments of the utility model, the interface is provided with a transition for bonding the extension tube with the interface.

According to some embodiments of the utility model, the cross-sectional area of the interface increases gradually in the direction of the interface towards the filter membrane.

According to some embodiments of the utility model, the first housing is provided with a water passing hole for communicating the first interface and the first cavity.

According to some embodiments of the utility model, the second housing is provided with a rib for drainage of liquid.

According to some embodiments of the utility model, a plurality of water passing holes are formed, and the plurality of water passing holes are uniformly distributed on the first shell.

According to some embodiments of the utility model, the plurality of ribs are uniformly distributed on the second housing.

According to some embodiments of the utility model, the first housing and the second housing are ultrasonically welded.

According to some embodiments of the utility model, the first housing is provided with a protrusion for welding the first housing with the second housing.

Additional aspects and advantages of the utility model will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the utility model.

Drawings

The utility model is further described below with reference to the drawings and examples;

FIG. 1 is a schematic view of a medical fluid one-way filter according to an embodiment of the present utility model;

FIG. 2 is a top view of the liquid unidirectional filter of FIG. 1;

FIG. 3 is a cross-sectional view A-A of the liquid one-way filter of FIG. 1;

FIG. 4 is a schematic view of a first compression section and a second compression section of the medical fluid one-way filter of FIG. 1;

FIG. 5 is a cross-sectional view B-B of the medical fluid one-way filter of FIG. 1;

FIG. 6 is a side view of the medical fluid one-way filter of FIG. 1;

FIG. 7 is a cross-sectional view of the liquid unidirectional filter of FIG. 1;

FIG. 8 is a D-D cross-sectional view of the medical fluid one-way filter of FIG. 1;

fig. 9 is a cross-sectional view of the transition of fig. 1.

Reference numerals:

a first housing 100, a first pressing part 110, a water passing hole 120, a protruding part 130;

a second housing 200, a second pressing portion 210, a convex strip 220;

interface 300, first interface 310, second interface 320, transition 330;

a filter membrane 400, a first chamber 410, a second chamber 420.

Detailed Description

Reference will now be made in detail to the present embodiments of the present utility model, examples of which are illustrated in the accompanying drawings, wherein the accompanying drawings are used to supplement the description of the written description so that one can intuitively and intuitively understand each technical feature and overall technical scheme of the present utility model, but not to limit the scope of the present utility model.

In the description of the present utility model, it should be understood that references to orientation descriptions such as upper, lower, front, rear, left, right, etc. are based on the orientation or positional relationship shown in the drawings, are merely for convenience of description of the present utility model and to simplify the description, and do not indicate or imply that the apparatus or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be construed as limiting the present utility model.

In the description of the present utility model, a number means one or more, a number means two or more, and greater than, less than, exceeding, etc. are understood to not include the present number, and above, below, within, etc. are understood to include the present number. The description of the first and second times, if any, is intended only for the purpose of distinguishing between technical features and should not be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated or implicitly indicating the precedence of the technical features indicated.

In the description of the present utility model, unless explicitly defined otherwise, terms such as arrangement, installation, connection, etc. should be construed broadly and the specific meaning of the terms in the present utility model can be reasonably determined by a person skilled in the art in combination with the specific contents of the technical scheme.

A medical fluid one-way filter according to an embodiment of the present utility model is described with reference to fig. 1 to 5.

As shown in fig. 1 to 5, a medical fluid one-way filter according to an embodiment of the present utility model includes a first housing 100; a second housing 200, the first housing 100 being disposed on the second housing 200; the interface 300, the interface 300 includes a first interface 310 and a second interface 320, the first interface 310 is disposed on the second housing 200, and the second interface 320 is disposed on the second housing 200; the filtering membrane 400 is arranged between the first shell 100 and the second shell 200, the filtering membrane 400 and the first shell 100 are enclosed to form a first cavity 410, the filtering membrane 400 and the second shell 200 are enclosed to form a second cavity 420, the first cavity 410 is communicated with the first interface 310, the second cavity 420 is communicated with the second interface 320, and the filtering membrane 400 is used for preventing liquid from flowing reversely.

As shown in fig. 1 and fig. 2, the first casing 100 is disposed on the second casing 200, the second casing 200 is provided with an interface 300, the interface 300 includes a first interface 310 and a second interface 320, where the first interface 310 is located on the right side of the first casing 100 and is a liquid water inlet, the second interface 320 is located on the left side of the first casing 100 and is a liquid water outlet, a filtering membrane 400 is disposed between the first casing 100 and the second casing 200, the filtering membrane 400 and the first casing 100 enclose to form a first cavity 410, the first cavity 410 is communicated with the first interface 310, the filtering membrane 400 and the second casing 200 enclose to form a second cavity 420, the second cavity 420 is communicated with the second interface 320, the first cavity 410 is located above the second cavity 420, medical liquid enters the first cavity 410 from the first interface 310, is filtered by unidirectional permeation through the filtering membrane 400, then enters the second cavity 420, and flows out from the second interface 320 to complete the filtration of the medical liquid.

It is conceivable that the filtering membrane 400 is a one-way filtering membrane 400, and its characteristic is one-way filtering, and the reverse direction cannot achieve the circulation of the liquid.

In some embodiments of the present utility model, the filtering membrane 400 is an asymmetric polyethersulfone membrane, which is an asymmetric pore structure, and the liquid can only pass through the filtering membrane 400 on one side and cannot pass through the filtering membrane 400 on the opposite side.

Further, depending on the use scenario, the accuracy of the filtration membrane 400 may be selected to be a variety of accuracy such as 0.1 μm, 0.2 μm, 0.45 μm, 0.65 μm, 0.8 μm, 1.2 μm, 2.0 μm, 3.0 μm, 5.0 μm, 6.5 μm, 8.0 μm, 10.0 μm, 15 μm, etc.

As shown in fig. 3 and 4, the first housing 100 has a first compressing part 110, the second housing 200 has a second compressing part 210, and the filtering membrane 400 is disposed between the first compressing part 110 and the second compressing part 210, and the first compressing part 110 and the second compressing part 210 are abutted against each other and tightly pressed to fix the filtering membrane 400 between the first housing 100 and the second housing 200, whereby, when liquid enters the first chamber 410 through the first interface 310, the liquid can only flow into the second chamber 420 through the filtering membrane 400, ensuring that all the liquid is filtered through the filtering membrane 400.

In some embodiments of the present utility model, the first compressing part 110 of the first housing 100 is formed as an annular protrusion with a downward protrusion direction, the second compressing part 210 of the second housing 200 is formed as an annular protrusion with an inward protrusion direction toward the center of the filtering membrane 400, the filtering membrane 400 is disposed between the first compressing part 110 and the second compressing part 210, and the bottom surface of the first compressing part 110 and the top surface of the second compressing part 210 compress the filtering membrane 400.

As shown in fig. 3 and 9, the interface 300 has a transition portion 330, and the cross-sectional area of the transition portion 330 gradually increases along the interface 300 toward the filtering membrane 400, so that the transition portion 330 can make it easier to insert the outer tube into the interface 300 to bond with the interface 300 when the outer tube is required to be connected to the interface 300.

It is contemplated that the transition 330 may be chamfered.

It is contemplated that the transition 330 may be rounded.

It is understood that the extension tube may be bonded to the inner wall of the interface 300.

It is understood that the extension tube may be bonded to the outer wall of the interface 300.

In some embodiments of the present utility model, the inner wall of the interface 300 is chamfered, the outer wall of the interface 300 is rounded, when the adapter is an inner adapter, the inner adapter is inserted into the interface 300 through the rounded transition portion 330, the inner adapter is bonded to the inner wall of the interface 300, and when the adapter is an outer adapter, the interface 300 is inserted into the outer adapter through the rounded transition portion 330, and the outer adapter is bonded to the outer wall of the interface 300.

As shown in fig. 8, in order to communicate the first port 310 with the first chamber 410, to control the flow rate of filtration, the first cover is provided with the water passing hole 120, the water passing hole 120 is provided at the right side of the first housing 100, and the liquid flows in from the first port 310 at the right side, passes through the water passing hole 120 and enters the second chamber 420.

In some embodiments of the present utility model, two water passing holes 120 are provided, it is conceivable that one, three, five or more water passing holes 120 may be provided, and the plurality of water passing holes 120 may control the filtering flow rate according to the needs of different scenes, when the number of water passing holes 120 is small, the incoming water can slowly enter the second cavity 420, so as to reduce the filtering speed, when the number of water passing holes 120 is large, the incoming water can quickly enter the first cavity 410, so as to accelerate the filtering speed, thereby achieving a better filtering effect under different use conditions.

As shown in fig. 5 and 7, the second housing 200 is provided with a protrusion 220, the protrusion 220 is disposed in the second chamber 420, the protrusion 220 abuts against the filtering membrane 400, the protrusion 220 divides the second chamber 420 into a plurality of channels, and the channels can play a role in draining liquid.

Further, the shape of the protruding strip 220 is adapted to the shape of the second housing 200, whereby the drainage effect on the liquid can be further enhanced.

In some embodiments of the present utility model, four ribs 220 are provided, the four ribs 220 divide the second cavity 420 into five channels, the front two ribs 220 are axisymmetrically arranged with the rear two ribs 220, the front-most ribs 220 are arranged with the rear-most ribs 220 in a fold line, the fold-line-shaped ribs 220 can adapt to the shape of the second housing 200 more, the drainage effect of the ribs 220 is further enhanced, when the liquid enters the first cavity 410 from the first interface 310 through the water passing hole 120, the liquid passes through the filter membrane 400 unidirectionally, enters the five channels of the second cavity 420, and flows out from the second interface 320 along the channels under the drainage of the ribs 220.

It can be appreciated that the raised strips 220 may also be provided with a plurality of one, two, three, etc., and different numbers of raised strips 220 may exhibit different drainage effects.

In some embodiments of the present utility model, the first housing 100 and the second housing 200 are welded by ultrasonic, the ultrasonic welding is low in cost and clean and pollution-free, and the ultrasonic welding product is a disposable product, so that pollution caused by incorrect opening or theft opening of the filter is avoided, and the filter is suitable for the field of medical appliances.

As shown in fig. 8, the first case 100 has a boss 130, the boss 130 is abutted against the second case 200, and when the first case 100 and the second case 200 are ultrasonically welded, the boss 130 can be fusion-joined with the second case 200.

In some embodiments of the present utility model, the number of the protrusions 130 is eight, and it is conceivable that the protrusions 130 may be provided in plural, such as two, four, six, etc., and the plurality of protrusions 130 can make the connection between the first housing 100 and the second housing 200 more stable.

The embodiments of the present utility model have been described in detail with reference to the accompanying drawings, but the present utility model is not limited to the above embodiments, and various changes can be made within the knowledge of one of ordinary skill in the art without departing from the spirit of the present utility model.

Claims

1. A medical fluid one-way filter, comprising:

a first housing (100);

a second housing (200), the first housing (100) being disposed on the second housing (200);

an interface (300), the interface (300) comprising a first interface (310) and a second interface (320), the first interface (310) being disposed on the second housing (200), the second interface (320) being disposed on the second housing (200);

filtration membrane (400), filtration membrane (400) set up first casing (100) with between second casing (200), filtration membrane (400) with first casing (100) enclose and form first cavity (410), filtration membrane (400) with second casing (200) enclose and form second cavity (420), first cavity (410) with first interface (310) intercommunication, second cavity (420) with second interface (320) intercommunication, filtration membrane (400) are used for preventing reverse flow of liquid.

2. A medical fluid one-way filter according to claim 1, wherein the first housing (100) has a first compression portion (110), the second housing (200) has a second compression portion (210), the filter membrane (400) is arranged between the first compression portion (110) and the second compression portion (210), and the first compression portion (110) and the second compression portion (210) are arranged to compress the filter membrane (400).

3. A medical fluid one-way filter according to claim 1, wherein the interface (300) is provided with a transition (330), the transition (330) being adapted to bond an extension tube to the interface (300).

4. A medical fluid one-way filter according to claim 1, wherein the cross-sectional area of the mouthpiece (300) increases gradually in the direction of the mouthpiece (300) towards the filter membrane (400).

5. The medical fluid one-way filter according to claim 1, wherein the first housing (100) is provided with a water passing hole (120), and the water passing hole (120) is used for communicating the first interface (310) and the first cavity (410).

6. A medical fluid one-way filter according to claim 1, wherein the second housing (200) is provided with a rib (220), the rib (220) being used for drainage of fluid.

7. The unidirectional filter for medical fluid of claim 5, wherein a plurality of water passing holes (120) are provided, and a plurality of water passing holes (120) are uniformly distributed on the first housing (100).

8. The unidirectional filter for medical fluid of claim 6, wherein a plurality of said ribs (220) are provided, and a plurality of said ribs (220) are uniformly disposed on said second housing (200).

9. A medical fluid one-way filter according to claim 1, wherein the first housing (100) and the second housing (200) are ultrasonically welded.

10. A medical fluid one-way filter according to claim 9, wherein the first housing (100) is provided with a protrusion (130), the protrusion (130) being used for welding the first housing (100) with the second housing (200).