Dropping funnel of infusion apparatus

Abstract

The utility model relates to a dropping funnel of an infusion apparatus, and belongs to a medical instrument accessory. Comprising a shell with a liquid inlet at the upper part and a liquid outlet at the lower part, the shell consists of an upper shell and a lower shell which are fixedly connected with each other, a bubble filtering membrane for separating an upper cavity and a lower cavity of the lower shell is fixed in the lower shell, the liquid outlet is positioned below the bubble filtering membrane, and an exhaust cap is fixed on the shell above the bubble filtering membrane. According to the utility model, the functions of automatic exhausting, automatic filtering, automatic liquid level keeping, automatic bubble eliminating and automatic liquid stopping can be realized, so that the labor intensity and mental burden of medical personnel are greatly reduced, and the infusion efficiency is improved.

Description

Technical Field

[0001] The utility model relates to a dripping funnel of an infusion device, belonging to a medical device accessory. Background Art

[0002] Disposable infusion sets, as conventional medical devices, are widely used in the medical field, primarily for intravenous infusion. They are common medical consumables, with the drip chamber playing a key role. When using traditional infusion sets, medical staff must manually squeeze the drip chamber to fill the infusion line with liquid medication and manually expel air from the infusion set. During the infusion process, the infusion set must be constantly monitored to prevent air from entering the body due to an empty bottle. This reduces infusion efficiency and increases workload, placing a significant strain on medical staff and placing a heavy mental and physical burden. Utility Model Content

[0003] The purpose of this utility model is to provide an infusion device dripping funnel that can automatically exhaust, filter, maintain liquid level, eliminate bubbles and stop liquid. The technical solutions adopted by this utility model are as follows:

[0004] An infusion device dripping hopper includes a shell with a liquid inlet on the upper part and a liquid outlet on the lower part. The shell is composed of an upper shell and a lower shell fixedly connected to each other. A bubble filter membrane is fixed in the lower shell to isolate the upper and lower cavities of the lower shell. The liquid outlet is located below the bubble filter membrane, and an exhaust cap is fixed on the shell above the bubble filter membrane.

[0005] Furthermore, a fixed exhaust hood is provided on the liquid outlet, and at least one liquid passage hole is provided on the exhaust hood.

[0006] Furthermore, the exhaust hood is in the shape of a hollow truncated cone, the upper surface of which is a flat surface without holes, and the liquid holes are arranged on its side and distributed along the circumference of the side.

[0007] Furthermore, each liquid passage hole is a long hole in the vertical direction.

[0008] Furthermore, an exhaust cap mounting hole is provided on the side wall of the lower shell body, and the exhaust cap mounting hole is provided with a protruding ring on the outer surface of the lower shell body; the exhaust cap includes an exhaust cover, and the exhaust cover consists of a main body part and a cover body part with an exhaust hole, the inner surface of the cover body cooperates with the outer end face of the protruding ring, and the main body is connected to the exhaust cap mounting hole; a step hole communicating with the exhaust hole is provided on the inner surface of the exhaust cover, and an exhaust membrane is fixed on the step surface of the step hole.

[0009] Furthermore, an outward-facing step surface is provided in the exhaust cap mounting hole of the lower shell, and the inner end surface of the exhaust cover corresponds to the step surface of the exhaust cap mounting hole.

[0010] Furthermore, the step hole on the inner surface of the exhaust cover is provided with two step surfaces, and an exhaust film is provided on each step surface.

[0011] The beneficial effects of the utility model are:

[0012] 1. The utility model uses the exhaust cap on one side of the infusion chamber to automatically exhaust the gas in the infusion tube when the liquid in the infusion bottle flows into the drip chamber, which is practical for automatic exhaust. The exhaust cap is provided with an exhaust membrane, which has the function of exhausting and blocking liquid. When the liquid level in the drip chamber exceeds the height of the exhaust membrane, the liquid level can be automatically maintained.

[0013] 2. A bubble filter membrane is set on the lower shell of the dripping hopper to realize automatic filtration. After being moistened, the bubble filter membrane has the function of blocking air and liquid. When the liquid level is flush with the filter membrane, the function of automatic liquid stopping can be realized. An exhaust hood with a liquid hole is set on the liquid outlet to realize the function of automatic bubble elimination, thereby greatly reducing the labor intensity and mental burden of medical staff and improving their infusion efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 A cross-sectional view of an embodiment of the present utility model;

[0015] Figure 2 for Figure 1 Enlarged view of point A;

[0016] Figure 3 for Figure 1 Cross-sectional view in the middle BB direction;

[0017] Among them, 1. upper shell, 2. lower shell, 3. liquid inlet, 4. exhaust cap mounting hole, 41. protruding ring, 5. exhaust cap, 51. exhaust cover, 52. exhaust hole, 53. exhaust membrane, 6. liquid outlet, 7. exhaust cover, 8. liquid hole, 9. bubble filter membrane. DETAILED DESCRIPTION

[0018] As shown in the figure, this embodiment includes a housing, which is composed of an upper housing 1 and a lower housing 2. The upper housing 1 and the lower housing 2 have an overlapping portion, at which the upper housing 1 and the lower housing 2 are bonded. In this embodiment, the upper housing 1 has a liquid inlet 3, and the lower housing 2 has a liquid outlet 6.

[0019] The lower portion of the lower housing 2 of this embodiment is provided with a stepped surface, on which a bubble filter membrane 9 is provided. The periphery of the bubble filter membrane 9 is fixedly connected to the stepped surface and isolates the cavity above and below the filter membrane. The bubble filter membrane 9 can be made of an existing automatic liquid-stop membrane.

[0020] A fixed exhaust hood 7 is located at the liquid outlet 6 below the bubble filter membrane 9. This hood 7 has a hollow, frustum-shaped exterior, its interior communicating with the liquid outlet 6. The upper surface of the hood 7 is a flat, imperforate surface close to the bubble filter membrane 9. A set of liquid passage holes 8 are circumferentially arranged on the side of the hood 7. These holes are vertically elongated, though other shapes are possible. The width of the holes 8 is preferably as narrow as possible without affecting the flow rate; 0.6 mm is typically used to maintain the surface tension of the liquid.

[0021] In this embodiment, an exhaust cap mounting hole 4 is provided on the side wall of the lower housing 2 above the bubble filter membrane 9. Exhaust cap mounting hole 4 has a protruding ring 41 protruding from the outer surface of the lower housing 2. An outwardly facing step surface is provided in the middle of exhaust cap mounting hole 4. An exhaust cap 5 is fixedly mounted in exhaust cap mounting hole 4.

[0022] The exhaust cap 5 includes an exhaust cover 51 with an exhaust hole 52 and an exhaust membrane 53. The exhaust cap 51 consists of a main body and a cover portion with the exhaust hole 52. The inner surface of the cover mates with the outer end surface of the protruding ring 41, and the main body is connected to the exhaust cap mounting hole 4. The connection between the two can be adhesively bonded or through a transition fit. The inner end surface of the cover mates with the stepped surface provided in the middle of the exhaust cap mounting hole 4, and preferably they mate with each other to improve the sealing effect at this location.

[0023] In this embodiment, the inner surface of the vent cap 51 is provided with a stepped hole that communicates with the vent hole 52. This stepped hole is then formed into two stepped surfaces, each of which is provided with a vent membrane 53. The perimeter of each vent membrane 53 is fixedly connected to the stepped surface on which it rests, forming a seal. The vent membrane 53 functions as a vent and liquid barrier, discharging gas from the infusion line above the dripping hopper, thereby achieving automatic venting and allowing the liquid medicine to flow into the dripping hopper. The vent membrane 53 is made of naturally hydrophobic ePTFE, and a double-layer vent membrane 53 ensures both bacterial resistance and safety.

[0024] In this embodiment, the bubble filter membrane 9 automatically blocks bubbles from passing through the liquid after being moistened. During use, the liquid enters the dripping hopper and moistens the bubble filter membrane 9, isolating the bubbles above the bubble filter membrane 9 and automatically exhausting them through the exhaust cap 5. Generally, the bubble filter membrane 9 is made of PES membrane with a pore distribution of varying gradients, with a maximum pore size of 15-20 μm and a minimum pore size of 3-5 μm, which provides both precision filtration and flow rate.

[0025] This embodiment utilizes the surface tension properties of liquids: When infusion begins, liquid flows from the infusion bottle or bag into the dripping hopper, passes through the bubble filter 9 of the lower housing 2, and reaches the exhaust hood 7 at the bottom of the lower housing 2. Due to the liquid's surface tension, the liquid does not immediately enter the exhaust hood 7 through the liquid hole 8. As the liquid continues to flow in, the liquid level in the dripping hopper gradually rises, and the gravity of the liquid also increases. At the same time, because the liquid outlet 6 below the exhaust hood 7 is connected to the infusion line, there is a difference in the air pressure within the exhaust hood 7 and the air pressure within the infusion line. When the pressure of the liquid in the dripping hopper (including the liquid's gravity and surface tension) is sufficiently high, it pushes the liquid into the exhaust hood 7 and discharges the air within the exhaust hood 7 from the top of the infusion line to the bottom outlet. This process ensures that the exhaust hood 7 does not exhaust air prematurely before a certain amount of liquid has been removed, thereby preventing unnecessary air from entering the infusion line.

[0026] When the present embodiment is in use, first, the exhaust membrane 53 in the exhaust cap 5 and the liquid outlet 6 at the lower part of the lower shell 2 are used to exhaust the gas in the infusion pipeline above the dripping hopper, so that the medicine liquid enters the dripping hopper; secondly, after the medicine liquid enters the dripping hopper, the bubble filter membrane 9 at the lower part of the lower shell 2 is completely wetted, thereby blocking the gas, so that the bubbles generated in the medicine liquid are isolated above the bubble filter membrane 9, and then the bubbles are discharged through the exhaust cap 5, realizing automatic exhaust; the liquid level in the dripping hopper gradually rises, and when it is flush with the exhaust membrane 53, automatic exhaust is realized under the action of air pressure. Maintain the liquid level; at the same time, the bubble filter membrane 9 can automatically block the gas after being moistened by the liquid medicine and can pass through the liquid medicine, and can automatically filter the liquid medicine. After passing through the bubble filter membrane 9, the liquid medicine reaches the exhaust hood 7 at the bottom of the lower shell 2. Under the action of the liquid surface tension, when the amount of liquid medicine is large enough and its pressure is greater than the surface tension, the liquid medicine enters the infusion pipeline below the liquid outlet 6 through the liquid hole 8 of the exhaust hood 7, and discharges the gas in the infusion pipeline below from the top until the infusion pipeline is filled with liquid, realizing automatic exhaust, and then the infusion set is punctured into the human vein.

[0027] After the infusion is completed, the medicine liquid gradually enters the human body. When the medicine liquid in the drip bucket is flush with the bubble filter membrane 9, the liquid is automatically stopped under the action of air pressure and the bubble filter membrane 9. After the medicine liquid automatically stops, when the infusion bottle is replaced, due to the effect of the liquid surface tension at the exhaust hood 7 above the liquid outlet, the tension of the lower part of the bubble filter membrane 9 of the lower shell is guaranteed, and the bubble filter membrane 9 can be prevented from generating bubbles through gas under severe shaking, thereby realizing the function of eliminating bubbles.

Claims

1. An infusion device dripping hopper, comprising a housing with a liquid inlet at the top and a liquid outlet at the bottom, characterized in that: The shell consists of an upper shell and a lower shell fixedly connected to each other. A bubble filter membrane is fixed in the lower shell to isolate the upper and lower cavities of the lower shell. The liquid outlet is located below the bubble filter membrane, and an exhaust cap is fixed on the shell above the bubble filter membrane.

2. The infusion device dripping funnel according to claim 1, characterized in that: A fixed exhaust cover is arranged on the liquid outlet, and at least one liquid passing hole is arranged on the exhaust cover.

3. The dripping funnel of the infusion set according to claim 2, characterized in that: The exhaust hood is in the shape of a hollow truncated cone, the upper surface of which is a flat surface without holes. The liquid holes are arranged on the side surface thereof and distributed along the circumference of the side surface.

4. The dripping funnel of the infusion set according to claim 3, characterized in that: Each liquid hole is a long hole in the up and down directions.

5. The dripping funnel of the infusion set according to claim 1, 2, 3 or 4, characterized in that: An exhaust cap mounting hole is provided on the side wall of the lower shell body, and a protruding ring is provided on the outer surface of the lower shell body; the exhaust cap includes an exhaust cover, and the exhaust cover consists of a main body part and a cover body part with an exhaust hole, the inner surface of the cover body cooperates with the outer end surface of the protruding ring, and the main body is connected to the exhaust cap mounting hole; a step hole communicating with the exhaust hole is provided on the inner surface of the exhaust cover, and an exhaust membrane is fixed on the step surface of the step hole.

6. The dripping funnel of the infusion set according to claim 5, characterized in that: An outward step surface is provided in the exhaust cap mounting hole of the lower shell, and the inner end surface of the exhaust cover corresponds to the step surface of the exhaust cap mounting hole.

7. The dripping funnel of the infusion set according to claim 6, characterized in that: The step hole on the inner surface of the exhaust cover is provided with two step surfaces, and each step surface is provided with an exhaust film.

Images