CN218106502U

CN218106502U - Air filter for blood transfusion and infusion apparatus

Info

Publication number: CN218106502U
Application number: CN202221054664.2U
Authority: CN
Inventors: 郭大磊; 朱军涛; 和平花; 李员红
Original assignee: Lianhua Healthcare Group Medical Supplies Co ltd
Current assignee: Lianhua Healthcare Group Medical Supplies Co ltd
Priority date: 2022-05-06
Filing date: 2022-05-06
Publication date: 2022-12-23
Anticipated expiration: 2032-05-06

Abstract

The utility model discloses an air filter for blood transfusion and infusion apparatus, which comprises a shell and an air filtering membrane; the shell comprises an upper shell and a lower shell, the upper shell and the lower shell are provided with an upper vent hole and a lower vent hole through which air passes, the inner wall of the lower shell at the upper end of the lower vent hole is provided with a support ring, and a waterproof breathable film is placed at the upper part of the support ring; an annular squeeze film isolating ring which is used for compressing the periphery of the waterproof breathable film and is spaced from the air filtering film by a certain distance is arranged at the upper part of the waterproof breathable film, and the air filtering film is arranged at the upper part of the squeeze film isolating ring; the upper shell is placed at the upper end of the air filtering membrane, and the upper shell compresses the air filtering membrane and is fixedly connected with the upper end of the lower shell in a close fit and buckling manner. The utility model overcomes sometimes the air filtration membrane is not enough by the moist of liquid medicine, low in production cost, and filtration, purifying effect are more stable, and the structure is simpler, also more are favorable to the automation of assembly.

Description

Air filter for blood transfusion and infusion apparatus

Technical Field

The invention relates to the technical field of medical instruments, in particular to an air filter for a blood transfusion device.

Background

Infusion and blood transfusion devices are common medical instruments. In the air, various particles and pathogenic microorganisms with different sizes, such as tubercle bacillus, pneumococcus, influenza virus and the like are dispersed, most of the pathogenic microorganisms are attached to the surfaces of various dust particles which are more than several times larger than the pathogenic microorganisms, can survive for a period of time in the air, and in the clinical intravenous infusion process, the air in a ward enters an infusion container through an air inlet pipe, so that the particles and the pathogenic microorganisms in the liquid medicine enter along with the air, the liquid medicine is polluted, and the liquid medicine enters a human body and is harmful to the human body. Therefore, in clinical intravenous transfusion and blood transfusion, according to the national standard requirements, a matched air filter is required to be used. However, in the actual use process, the liquid medicine in the infusion apparatus easily flows backwards to wet the air filtering membrane, after the air filtering membrane is wetted by the liquid medicine, the air permeability of the air filtering membrane is reduced, the air pressure inside and outside the container is difficult to balance continuously, the pressure in the container is reduced sometimes, and the infusion of the liquid medicine is prevented. CN208838785U air filter for blood transfusion and infusion apparatus overcomes the defect that the air filtering membrane is wet by liquid medicine to a certain extent, has low production cost and good filtering and sealing effects, but also has the problem that the air filtering membrane is wet due to the uneven tilting of the flexible membrane.

Disclosure of Invention

The utility model provides an air filter for blood transfusion and infusion apparatus, which solves the defects of the prior art, has simple structure, low production cost and more stable filtering and purifying effects.

The utility model relates to an air filter for blood transfusion and infusion apparatus, which comprises a shell and an air filtering membrane; the shell comprises an upper shell and a lower shell, the upper shell and the lower shell are provided with an upper vent hole and a lower vent hole for air to pass through, the inner wall of the lower shell at the upper end of the lower vent hole is provided with a support ring, and the upper part of the support ring is provided with a waterproof breathable film; an annular squeeze film isolating ring which is used for compacting the periphery of the waterproof breathable film and is spaced from the air filtering film by a certain distance is arranged at the upper part of the waterproof breathable film, and the air filtering film is arranged at the upper part of the squeeze film isolating ring; the upper casing is placed at the upper end of the air filtering membrane, and the upper casing tightly presses the air filtering membrane and is fixedly connected with the upper end of the lower casing in a tight fit and buckling manner.

The support ring is a natural inward extension of the lower housing material.

The press mold isolating ring is characterized in that the peripheral surface of the press mold isolating ring is provided with a protrusion, the inner surface of the lower shell is provided with a groove, the protrusion and the groove are matched, and the press mold isolating ring is fixedly connected with the lower shell in a tight fit clamping manner.

In the application process of the air filter for the blood transfusion and the infusion apparatus, under the normal condition during infusion, air passes through the air filtering membrane and the waterproof breathable membrane in sequence due to air pressure difference; when violent shock liquid is excessive, because the waterproof breathable film blocks water, the liquid can not flow through the waterproof breathable film, and the waterproof breathable film and the air filtering film are separated by a distance, so that the air filtering film can not be wetted.

Compared with the prior art, the air filter for the blood transfusion and infusion apparatus overcomes the defects that the air filter membrane is wet by liquid medicine sometimes, has low production cost, more stable filtering and purifying effects and simpler structure, and is more favorable for the automation of assembly.

Drawings

FIG. 1 is a schematic structural diagram of an embodiment of the present invention

Fig. 2 is an exploded view of an embodiment of the present invention.

Detailed Description

The following description of the embodiments of the present invention will be made with reference to the accompanying drawings:

as shown in fig. 1 and fig. 2, the air filter for blood transfusion and infusion apparatus of the present invention comprises a housing, an air filtering membrane 1; the shell comprises an upper shell 2 and a lower shell 3, the upper shell 2 and the lower shell 3 are provided with an upper vent hole 21 and a lower vent hole 31 for air to pass through, the inner wall of the lower shell 3 at the upper end of the lower vent hole 31 is provided with a support ring 32 made of a lower shell 3 material and naturally extending inwards, and the upper part of the support ring 32 is provided with a waterproof breathable film 4; an annular film pressing isolation ring 5 used for compressing the periphery of the waterproof breathable film 4 and spaced from the air filtering film 1 by a certain distance is arranged at the upper part of the waterproof breathable film 4, a bulge is arranged on the peripheral surface of the film pressing isolation ring 5, an annular groove is arranged on the inner surface of the lower shell 3, the bulge is matched with the groove, and the film pressing isolation ring 5 is tightly matched, clamped and connected with the lower shell 3; the air filtering membrane 1 is placed on the upper part of the squeeze membrane isolating ring 5; the upper casing 2 is placed at the upper end of the air filtering membrane 1, and the upper casing 2 compresses the air filtering membrane 1 and is fixedly connected with the upper end of the lower casing 3 in a close fit and buckling manner.

Claims

1. An air filter for a blood transfusion set comprises a shell and an air filtering membrane; the shell comprises an upper shell and a lower shell, and the upper shell and the lower shell are provided with an upper vent hole and a lower vent hole for air to pass through; the air vent structure is characterized in that a support ring is arranged on the inner wall of the lower shell at the upper end of the lower vent hole, and a waterproof breathable film is arranged at the upper part of the support ring; an annular squeeze film isolating ring which is used for compacting the periphery of the waterproof breathable film and is spaced from the air filtering film by a certain distance is arranged at the upper part of the waterproof breathable film, and the air filtering film is arranged at the upper part of the squeeze film isolating ring; the upper casing is placed at the upper end of the air filtering membrane, and the upper casing tightly presses the air filtering membrane and is fixedly connected with the upper end of the lower casing in a tight fit and buckling manner.

2. An air filter for transfusions and infusion sets as claimed in claim 1, wherein said support ring is a natural inward extension of the lower housing material.

3. The air filter for blood transfusion and infusion set of claim 1, wherein the squeeze film isolating ring has a protrusion on its outer surface and a groove on its inner surface, and the protrusion and the groove are matched to fix the squeeze film isolating ring and the lower housing by tight fit and snap fit.