Transfusion filter

Abstract

The utility model belongs to the technical field of filters, and particularly relates to an infusion filter which comprises a shell and a filter membrane arranged in the shell, the filter membrane divides an inner cavity of the shell into a liquid inlet cavity and a liquid outlet cavity, and a liquid inlet pipe communicated with the liquid inlet cavity and a liquid outlet pipe communicated with the liquid outlet cavity are arranged on the shell. A liquid inlet cavity is arranged in the shell, a partition plate dividing the liquid inlet cavity into an upper cavity and a lower cavity is arranged in the shell, the liquid inlet pipe is communicated with the upper cavity, an upper exhaust hole communicated with the upper cavity and a lower exhaust hole communicated with the lower cavity are formed in the shell, an upper water-blocking breathable film is arranged on the inner side of the upper exhaust hole, and a lower water-blocking breathable film is arranged on the inner side of the lower exhaust hole. The air filter is convenient to operate, and the situation that human health is affected by air in the filter due to misoperation or negligence does not exist.

Description

TECHNICAL FIELD

[0001] The utility model belongs to filter technical field, especially point to a kind of infusion filter. BACKGROUND

[0002] The infusion filter is a kind of medical instrument for filtering the microparticle and impurity in infusion, usually by filter core, shell and connecting pipe composition. When infusion, infusion tube is connected to the connecting pipe of filter, then filter is connected to intravenous injection needle or syringe, so that infusion will be filtered by filter, to reduce the influence of harmful substances on patients.

[0003] Chinese utility model patent (publication number CN209378171U, application date 2018.08.29, publication date 2019.09.13) discloses a kind of disposable nutrient solution infusion device, including bottle plug puncture device, drip chamber, filter and infusion needle connected by conduit in turn;The filter has hollow cavity, a filter liquid-stopping diaphragm (i.e. filter membrane) is vertically arranged in the filter, which divides the hollow cavity into first chamber (i.e. liquid inlet chamber) and second chamber (i.e. liquid outlet chamber) independent of each other, at least two longitudinal arrangement and communicating first chamber and outside exhaust passage are formed on the side wall of the first chamber, each of the exhaust passage is separated from the first chamber by exhaust diaphragm, the upper end of the first chamber is also provided with liquid inlet lumen communicated with the conduit, the side wall of the second chamber is formed with a plurality of first flow guide ribs extending longitudinally, and the lower end of the second chamber is provided with liquid outlet lumen communicated with the conduit.

[0004] The deficiency of the above-mentioned filter is that: in the use process, because the filter membrane has resistance, after the liquid medicine enters the liquid inlet chamber from the liquid inlet lumen, it will flow to the bottom of the liquid inlet chamber first, then filter into the bottom of the liquid outlet chamber through the filter membrane, and then directly discharged from the liquid outlet lumen, there will be a lot of air in the upper part of the liquid outlet chamber, which will enter the human body along with the liquid medicine during infusion, which is harmful to the human body. In order to avoid this situation, the filter needs to be inverted before infusion, so that the liquid outlet pipe is higher than the liquid inlet pipe, the air in the liquid outlet chamber is discharged, and after the liquid medicine fills the inner cavity of the filter, the filter is placed vertically, and the infusion starts. It is troublesome to operate, and in the case of improper operation or negligence, air may exist in the filter, which affects the health of the human body. SUMMARY

[0005] The utility model aims at providing a kind of infusion filter, which is easy to operate, and there is no air in the filter due to improper operation or negligence, which affects the health of the human body.

[0006] The utility model is realized as follows:

[0007] An infusion filter includes a housing and a filter membrane arranged in the housing, the filter membrane separates a cavity in the housing into an inlet cavity and an outlet cavity, the housing is provided with an inlet pipe communicating with the inlet cavity and an outlet pipe communicating with the outlet cavity, the housing is provided with a partition plate separating the inlet cavity into an upper cavity and a lower cavity, the inlet pipe communicates with the upper cavity, the housing is provided with an upper air vent communicating with the upper cavity and a lower air vent communicating with the lower cavity, the upper air vent is provided with an upper water-resistant air-permeable membrane on the inner side, and the lower air vent is provided with a lower water-resistant air-permeable membrane on the inner side.

[0008] In the above-mentioned infusion filter, a flow barrier is arranged between the upper cavity and the inlet pipe, the flow barrier is provided with a flow hole communicating with the upper cavity and the inlet pipe, and the flow hole is arranged in two or more along the length direction of the flow barrier.

[0009] In the above-mentioned infusion filter, the flow barrier is arranged in the horizontal direction.

[0010] In the above-mentioned infusion filter, the housing includes a front cover and a rear shell, the partition plate and the flow barrier are arranged on the front cover and are integrated with the front cover, the inlet pipe is arranged on the upper end of the rear shell, the outlet pipe is arranged on the lower end of the rear shell, and the inlet pipe and the outlet pipe are integrated with the rear shell, the front cover and the rear shell form a liquid passage cavity above the flow barrier, the inlet pipe communicates with the liquid passage cavity, the flow hole communicates with the liquid passage cavity and the upper cavity, the front cover, the flow barrier and the filter membrane form the inlet cavity, and the rear shell and the filter membrane form the outlet cavity.

[0011] In the above-mentioned infusion filter, the front cover is provided with a front mounting frame sealingly connected with the filter membrane, the front cover, the flow barrier, the front mounting frame and the filter membrane form the inlet cavity, the rear shell is provided with a rear mounting frame sealingly connected with the filter membrane, the rear shell, the rear mounting frame and the filter membrane form the outlet cavity, and the rear mounting frame is provided with a plurality of shunt ribs, the rear surface of the shunt rib is connected to the rear shell, and the front surface is flush with the front surface of the rear mounting frame.

[0012] In the above-mentioned infusion filter, the front mounting frame and the front cover are integrated, and the rear mounting frame and the rear shell are integrated.

[0013] In the above-mentioned infusion filter, the thickness of the shunt rib is 0.8mm-1.2mm.

[0014] In the infusion filter, the front cover is provided with upper and lower protruding mounting strips, the upper and lower air vents are arranged on the upper and lower mounting strips respectively, the inner surface of the upper mounting strip is recessed towards the side away from the filter membrane to form an upper air passage, the upper water-blocking and air-permeable membrane cover is arranged on the upper air passage, the inner surface of the lower mounting strip is recessed towards the side away from the filter membrane to form a lower air passage, and the lower water-blocking and air-permeable membrane cover is arranged on the lower air passage.

[0015] In the infusion filter, the upper and lower water-blocking and air-permeable membranes and the filter membrane are fixed to the front cover by welding.

[0016] In the infusion filter, the length direction of the upper and lower mounting strips is arranged in the transverse direction, the upper air vent is provided with two upper air vents arranged at the left and right ends of the upper mounting strip respectively, and the lower air vent is provided with two lower air vents arranged at the left and right ends of the lower mounting strip respectively.

[0017] In the infusion filter, the partition plate is arranged at an upper position in the middle of the shell.

[0018] Compared with the prior art, the infusion filter has the following advantages:

[0019] 1. The partition plate is arranged in the shell to separate the liquid inlet cavity into an upper cavity and a lower cavity, so that the liquid filtered by the filter membrane first enters the upper part of the liquid outlet cavity, the air in the upper part of the liquid outlet cavity is discharged, then the liquid flows into the lower part of the liquid outlet cavity, and the air in the lower part of the liquid outlet cavity is discharged, without inverting the infusion filter, the air in the liquid outlet cavity can be discharged, and the liquid can fill the inner cavity of the filter, so that the operation is convenient, and the situation that air exists in the filter due to improper operation or negligence and affects human health is avoided.

[0020] 2. The flow barrier is arranged between the upper cavity and the liquid inlet pipe, the flow barrier is provided with flow holes communicating the upper cavity and the liquid inlet pipe, the flow holes are arranged at two or more positions along the length direction of the flow barrier, the liquid flows to the upper cavity through the flow holes, the liquid can be uniformly distributed in the inner cavity of the upper cavity, and the filtering effect of the filter membrane is good. BRIEF DESCRIPTION OF DRAWINGS

[0021] Figure 1 is the perspective view of the infusion filter of the utility model Figure 1 ;

[0022] Figure 2 is the perspective view of the infusion filter of the utility model Figure 2 ;

[0023] Figure 3 is the sectional view of the infusion filter of the utility model

[0024] Figure 4is a perspective view of the front cover of the utility model;

[0025] Figure 5 is a perspective view of the front cover and the upper and lower air resistance and permeable membranes of the utility model;

[0026] Figure 6 is a perspective view of the utility model without a rear shell;

[0027] Figure 7 is a perspective view of the rear shell of the utility model.

[0028] Reference signs: 1, shell; 1a, front cover; 1b, rear shell; 2, filter membrane; 3, liquid inlet cavity; 3a, upper cavity; 3b, lower cavity; 4, liquid outlet cavity; 5, liquid inlet pipe; 6, liquid outlet pipe; 7, partition plate; 8, upper air vent; 9, lower air vent; 10, upper water resistance and permeable membrane; 11, lower water resistance and permeable membrane; 12, flow blocking strip; 13, flow hole; 14, liquid passing cavity; 15, front mounting frame; 16, rear mounting frame; 17, flow dividing rib; 18, upper mounting strip; 19, lower mounting strip; 20, upper air passage; 21, lower air passage. DETAILED DESCRIPTION

[0029] The utility model will be further described below with specific embodiments, referring to Figure 1 -7:

[0030] A kind of infusion filter, including shell 1 and the filter membrane 2 being arranged in shell 1, the filter membrane 2 will be divided into liquid inlet cavity 3 and liquid outlet cavity 4 by the cavity in shell 1, the shell 1 is equipped with the liquid inlet pipe 5 being communicated with liquid inlet cavity 3 and the liquid outlet pipe 6 being communicated with liquid outlet cavity 4, the shell 1 is equipped with the partition plate 7 being divided into upper cavity 3a and lower cavity 3b by liquid inlet cavity 3, the liquid inlet pipe 5 is communicated with upper cavity 3a, the shell 1 is equipped with the upper air vent 8 being communicated with upper cavity 3a and the lower air vent 9 being communicated with lower cavity 3b, the upper air vent 8 inside is equipped with upper water resistance and permeable membrane 10, lower air vent 9 inside is equipped with lower water resistance and permeable membrane 11.

[0031] In the embodiment, front-rear direction is longitudinal direction, up-down direction is vertical direction, left-right direction is horizontal direction.

[0032] The working principle of the utility model is as follows: Figures 1-7 As shown in the drawing, liquid medicine enters upper cavity 3a through liquid inlet pipe 5 first, then enters the upper part of liquid outlet cavity 4 after being filtered by filter membrane 2, and then flows to the lower part of liquid outlet cavity 5, part of the liquid medicine flows to lower cavity 3b through filter membrane 2, and the other part of the liquid medicine is discharged through liquid outlet pipe 6, the air in liquid outlet cavity 5 is discharged through liquid outlet pipe 6, the air in upper cavity 3a is discharged through upper water resistance and permeable membrane 10, and the air in lower cavity 3b is discharged through lower water resistance and permeable membrane 11.

[0033] This invention features a partition 7 inside the housing 1 that divides the inlet chamber 3 into an upper chamber 3a and a lower chamber 3b. This allows the medicine filtered by the filter membrane 2 to first enter the upper part of the outlet chamber 5, expelling the air in the upper part of the outlet chamber 5. Then, the medicine flows into the lower part of the outlet chamber 5, expelling the air in the lower part of the outlet chamber 5. This eliminates the need to invert the infusion filter to expel the air from the outlet chamber 5, thereby filling the filter cavity with medicine. This facilitates operation and prevents the presence of air in the filter that could affect human health due to improper operation or negligence.

[0034] In order to ensure that the liquid medicine flowing out of the inlet pipe 5 flows evenly into the upper cavity 3a, so that the liquid medicine in the upper cavity 3a is evenly distributed and the filtration effect of the filter membrane 2 is good, such as... Figures 3-6 As shown, a baffle strip 12 is provided between the upper cavity 3a and the inlet pipe 5. The baffle strip 12 has flow holes 13 connecting the upper cavity 3a and the inlet pipe 5. Two or more flow holes 13 are spaced apart along the length of the baffle strip 12. The liquid medicine flows through the flow holes 13 into the upper cavity 3a, preventing the liquid medicine from concentrating in the middle of the upper cavity 3a. In this embodiment, three flow holes 13 are spaced apart along the length of the baffle strip 12.

[0035] Furthermore, the flow deflector 12 is arranged in a horizontal direction.

[0036] Structure of housing 1: The housing 1 includes a front cover 1a and a rear cover 1b. The partition 7 and the baffle 12 are both disposed on the front cover 1a and are integral with the front cover 1a. The liquid inlet pipe 5 is disposed on the upper end of the rear cover 1b, and the liquid outlet pipe 6 is disposed on the lower end of the rear cover 1b. The liquid inlet pipe 5 and the liquid outlet pipe 6 are integral with the rear cover 1b. A liquid passage chamber 14 is formed between the front cover 1a and the rear cover 1b, located above the baffle 12. The liquid inlet pipe 5 is connected to the liquid passage chamber 14. The flow passage hole 13 is connected to the liquid passage chamber 14 and the upper cavity 3a. The liquid inlet chamber 3 is formed between the front cover 1a, the baffle 12 and the filter membrane 2. The liquid outlet chamber 4 is formed between the rear cover 1b and the filter membrane 2.

[0037] In order to ensure that the medicine in the dispensing chamber 4 is evenly distributed, such as Figure 7 As shown, the front cover 1a is provided with a front mounting frame 15 that is sealed to the filter membrane 2. The front cover 1a, the flow deflector 12, the front mounting frame 15 and the filter membrane 2 form the liquid inlet chamber 3. The rear shell 1b is provided with a rear mounting frame 16 that is sealed to the filter membrane 2. The rear shell 1b, the rear mounting frame 16 and the filter membrane 2 form the liquid outlet chamber 4. The rear mounting frame 16 is provided with a plurality of flow dividers 17. The rear surface of the flow dividers 17 is connected to the rear shell 1b and the front surface is flush with the front surface of the rear mounting frame 16.

[0038] Furthermore, the front mounting frame 15 and the front cover 1a are an integral structure, and the rear mounting frame 16 and the rear shell 1b are an integral structure.

[0039] Preferably, the thickness of the diversion rib 17 is 0.8mm-1.2mm. In this embodiment, the thickness of the diversion rib 17 is 1mm, which allows the liquid in the outlet chamber 4 to flow from the top to the bottom along the inner wall of the rear shell 1b, and the flow speed is fast.

[0040] Installation structure of the upper water-blocking and breathable membrane 10 and the lower water-blocking and breathable membrane 11: as follows Figures 1-6 As shown, the front cover 1a has an outwardly protruding upper mounting strip 18 and a lower mounting strip 19. The upper vent 8 is located on the upper mounting strip 18, and the lower vent 9 is located on the lower mounting strip 19. The inner surface of the upper mounting strip 18 is recessed towards the side away from the filter membrane 2 to form an upper venting groove 20. The upper water-resistant and breathable membrane 10 covers the upper venting groove 20. The inner surface of the lower mounting strip 19 is recessed towards the side away from the filter membrane 2 to form a lower venting groove 21. The lower water-resistant and breathable membrane 11 covers the lower venting groove 21. Air in the upper cavity 3a enters the upper venting groove 20 through the upper water-resistant and breathable membrane 10 and then exits through the upper venting hole 8. Air in the lower cavity 3b enters the lower venting groove 21 through the lower water-resistant and breathable membrane 11 and then exits through the lower venting hole 9.

[0041] Furthermore, the upper water-blocking and breathable membrane 10, the lower water-blocking and breathable membrane 11, and the filter membrane 2 are all fixed to the front cover 1a by welding.

[0042] For better air venting, the upper mounting strip 18 and the lower mounting strip 19 are both arranged horizontally along their length. There are two upper exhaust holes 8, which are located at the left and right ends of the upper mounting strip 18, respectively. There are two lower exhaust holes 9, which are located at the left and right ends of the lower mounting strip 19, respectively.

[0043] Furthermore, the partition 7 is positioned slightly above the center of the housing 1. In this embodiment, the partition 7 is positioned at one-third of the distance from the top to the bottom of the housing 1.

[0044] The above embodiments are only one of the preferred embodiments of this utility model and are not intended to limit the scope of implementation of this utility model. Therefore, all equivalent changes made in accordance with the shape, structure and principle of this utility model should be covered within the protection scope of this utility model.

Claims

1. An infusion filter comprising a housing (1) and a filter membrane (2) arranged in the housing (1), the filter membrane (2) separating a cavity in the housing (1) into an inlet cavity (3) and an outlet cavity (4), the housing (1) being provided with an inlet pipe (5) communicating with the inlet cavity (3) and an outlet pipe (6) communicating with the outlet cavity (4), characterized in that: The shell (1) is provided with a partition plate (7) separating the liquid inlet cavity (3) into an upper cavity (3a) and a lower cavity (3b), the liquid inlet pipe (5) is communicated with the upper cavity (3a), the shell (1) is provided with an upper air vent (8) communicated with the upper cavity (3a) and a lower air vent (9) communicated with the lower cavity (3b), the inner side of the upper air vent (8) is provided with an upper water-blocking air-permeable membrane (10), and the inner side of the lower air vent (9) is provided with a lower water-blocking air-permeable membrane (11).

2. The infusion filter of claim 1, wherein: The upper cavity (3a) and the liquid inlet pipe (5) are provided with a flow barrier (12), the flow barrier (12) is provided with a flow hole (13) communicated with the upper cavity (3a) and the liquid inlet pipe (5), and the flow hole (13) is arranged in two or more than two along the length direction of the flow barrier (12).

3. A filter for infusate according to claim 2, wherein: The shell (1) comprises a front cover (1a) and a rear shell (1b), the partition plate (7) and the flow barrier (12) are arranged on the front cover (1a) and are integrated with the front cover (1a), the liquid inlet pipe (5) is arranged on the upper end of the rear shell (1b), the liquid outlet pipe (6) is arranged on the lower end of the rear shell (1b), the liquid inlet pipe (5) and the liquid outlet pipe (6) are integrated with the rear shell (1b), the upper liquid passing cavity (14) is formed between the front cover (1a) and the rear shell (1b) and is located above the flow barrier (12), the liquid inlet pipe (5) is communicated with the upper liquid passing cavity (14), the flow hole (13) is communicated with the upper liquid passing cavity (14) and the upper cavity (3a), the liquid inlet cavity (3) is formed between the front cover (1a), the flow barrier (12) and the filter membrane (2), and the liquid outlet cavity (4) is formed between the rear shell (1b) and the filter membrane (2).

4. The infusion filter of claim 3, wherein: The front cover (1a) is provided with a front mounting frame (15) sealingly connected with the filter membrane (2), the liquid inlet cavity (3) is formed between the front cover (1a), the flow barrier (12), the front mounting frame (15) and the filter membrane (2), the rear shell (1b) is provided with a rear mounting frame (16) sealingly connected with the filter membrane (2), the liquid outlet cavity (4) is formed between the rear shell (1b), the rear mounting frame (16) and the filter membrane (2), and the rear mounting frame (16) is provided with a plurality of shunt ribs (17), the rear surface of the shunt rib (17) is connected to the rear shell (1b), and the front surface is flush with the front surface of the rear mounting frame (16).

5. A filter as claimed in claim 4, wherein: The thickness of the shunt rib (17) is 0.8mm-1.2mm.

6. The infusion filter of claim 3, wherein: The front cover (1a) is provided with an upper mounting strip (18) and a lower mounting strip (19) protruding outward, the upper air vent (8) is arranged on the upper mounting strip (18), the lower air vent (9) is arranged on the lower mounting strip (19), the inner surface of the upper mounting strip (18) is recessed to form an upper air passage (20) on the side away from the filter membrane (2), the upper water-blocking air-permeable membrane (10) is arranged on the upper air passage (20), and the inner surface of the lower mounting strip (19) is recessed to form a lower air passage (21) on the side away from the filter membrane (2), and the lower water-blocking air-permeable membrane (11) is arranged on the lower air passage (21).

7. A filter as claimed in claim 6, wherein: The upper water-resisting and air-permeable film (10), the lower water-resisting and air-permeable film (11) and the filter film (2) are fixed on the front cover (1a) by welding.

8. The infusion filter of claim 6, wherein: The length direction of the upper mounting strip (18) and the lower mounting strip (19) is arranged along the transverse direction, the upper air vent (8) is provided with two and is respectively located at the left and right ends of the upper mounting strip (18), and the lower air vent (9) is provided with two and is respectively located at the left and right ends of the lower mounting strip (19).

9. The infusion filter of claim 1, wherein: The partition plate (7) is arranged at an upper position in the middle of the shell (1).

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