Carbon fiber skeleton pipe for medical ventilator

Abstract

The present invention relates to the technical field of ventilators, and in particular to a carbon fiber skeleton pipeline for a medical ventilator, comprising: a soft pipeline, a carbon fiber resin composite skeleton, a carbon fiber electric heating wire and a carbon fiber filter layer. The soft pipeline is a tubular structure with openings at both ends and a breathing passage. The carbon fiber resin composite skeleton and the carbon fiber electric heating wire are both buried in the pipe wall of the soft pipeline, and the carbon fiber resin composite skeleton and the carbon fiber electric heating wire are both spirally wound on the soft pipeline along the axial direction of the soft pipeline. The carbon fiber electric heating wire has an electrode, which is led out of the soft pipeline by the carbon fiber electric heating wire. The carbon fiber filter layer is filled in the breathing passage of the soft pipeline. The present invention ensures stability and non-deformation by arranging a rigid support in the soft pipeline, and at the same time arranging a carbon fiber electric heating wire in the pipeline to ensure the temperature of the gas in the pipeline, thereby improving the comfort of the pipeline during use while keeping the pipeline shape basically unchanged.

Description

Technical Field

[0001] The invention relates to the technical field of ventilators, in particular to a carbon fiber skeleton pipeline for a medical ventilator. Background Art

[0002] The information disclosed in the background of the invention is only intended to enhance the understanding of the overall background of the invention and should not be necessarily regarded as an acknowledgment or any form of suggestion that the information constitutes the prior art already known to a person skilled in the art.

[0003] A ventilator is an important medical rescue and treatment device that can improve and treat the normal physiological respiratory function of the human body, effectively increase lung breathing volume, improve breathing conditions, reduce respiratory consumption, and save the heart's respiratory reserve capacity. Ventilators are widely used in critically ill patients. In order to improve the comfort of ventilators and enhance their gas filtering and purification functions, the replacement of ventilator gas circulation pipeline materials has become the focus of current research and development.

[0004] In addition, the inventors have found that during the actual use of the ventilator, especially during rescue or first aid, the ventilator operator may move the bed or the user's body due to the progression of the disease. When the patient turns sideways or turns his head or the child is active and difficult to be quiet, the breathing hose of the ventilator will continue to move, entangle or twist, which will not only accelerate the wear and aging of the ventilator hose, but also loosen the connection between the hose and the breathing mask, causing the hose to be squeezed, and even cause the respiratory system to be blocked, worsening the user's condition. In addition, the ambient temperature of the ventilator in the intensive care unit is generally 21~23°, and the temperature of gas replacement in the human body is generally consistent with the human body temperature (35~37°). This temperature difference can easily cause water vapor in the ventilator pipeline to condense, affecting the comfort of the ventilator. Summary of the invention

[0005] In view of the above problems, the present invention proposes a carbon fiber skeleton pipe for a medical ventilator. The present invention sets a rigid support in the soft pipe of the ventilator to ensure stability and no deformation. At the same time, a carbon fiber electric heating wire is set in the soft pipe to ensure the temperature of the gas in the soft pipe, thereby improving the comfort of the use of the soft pipe while keeping the shape of the soft pipe basically unchanged. To achieve the above purpose, the technical solution of the present invention is as follows.

[0006] A carbon fiber skeleton pipe for a medical ventilator comprises: a soft pipeline, a carbon fiber resin composite skeleton, a carbon fiber electric heating wire and a carbon fiber filter layer. The soft pipeline is a tubular structure with openings at both ends and a breathing passage. The carbon fiber resin composite skeleton and the carbon fiber electric heating wire are both buried in the pipe wall of the soft pipeline, and the carbon fiber resin composite skeleton and the carbon fiber electric heating wire are both spirally wound on the soft pipeline along the axial direction of the soft pipeline. The carbon fiber electric heating wire has an electrode, which is led out of the soft pipeline by the carbon fiber electric heating wire. The carbon fiber filter layer is filled in the breathing passage of the soft pipeline.

[0007] Furthermore, the material of the soft pipe is a thermoplastic resin, which can be selected from any one of polyethylene, polypropylene, polyvinyl chloride, polyamide, polyimide, polyether ketone, polyether ether ketone, polyphenylene sulfide, polyethylene terephthalate, and butylene terephthalate.

[0008] Furthermore, the bending radius of the soft pipe is within the range of 10-30 mm, the inner diameter is within the range of 5-25 mm, and the outer diameter is within the range of 9-30 mm.

[0009] Furthermore, the carbon fiber resin composite skeleton is composited with high-strength carbon fiber and thermosetting resin, and its shape is a flat ribbon; optionally, the width of the carbon fiber rigid skeleton is controlled within the range of 2~5mm, the thickness is controlled within the range of 1~1.5mm, and the spiral winding angle of the carbon fiber resin composite skeleton is 30°~60°.

[0010] Furthermore, in the carbon fiber resin composite skeleton, the carbon fiber used includes any one of high-strength carbon fibers such as T300, T700, T800, T1000, etc. The thermosetting resin includes any one of unsaturated polyester resin, epoxy resin, phenolic resin, silicone resin, etc. The resin content in the carbon fiber resin composite skeleton is controlled within the range of 30% to 50% of the total mass of the skeleton.

[0011] Furthermore, the carbon fiber electric heating wire is parallel to the carbon fiber resin composite skeleton. The carbon fiber electric heating wire is a flexible carbon fiber heating wire with a diameter of 0.5~1mm. The heating wire can make the surface temperature of the hose reach 35~37℃. The heating wire leads out electrodes at both ends of the soft pipe 1 and is used in parallel with the power supply of the ventilator. Optionally, the flexible carbon fiber heating wire includes any one of T300, T700, T800, T1000, etc.

[0012] Furthermore, the thickness of the carbon fiber filter layer is controlled within the range of 0.5-1 mm, and the filter layer is a flexible felt composed of short-cut activated carbon fibers. Optionally, the specific surface area of ​​the short-cut activated carbon fiber monofilament is 1000-3000 m 2 / g, and the surface pore size of the chopped activated carbon fiber is 1~4nm.

[0013] Furthermore, the porosity of the carbon fiber filter layer is controlled within the range of 80% to 95%, which can efficiently filter a variety of pathogens in the replacement gas.

[0014] Compared with the prior art, the present invention has the following beneficial effects:

[0015] (1) The present invention provides a carbon fiber resin composite skeleton in the soft pipe of the ventilator to form a rigid support, thereby ensuring that the shape of the soft pipe is stable and does not deform. At the same time, a carbon fiber electric heating wire is provided in the soft pipe to ensure the temperature of the gas in the soft pipe, thereby improving the comfort of the soft pipe when in use while keeping the appearance of the soft pipe basically unchanged.

[0016] (2) The present invention sets the shape of the carbon fiber resin composite skeleton to be spiral and extends along the axial direction of the soft pipe. When the soft pipe is bent or otherwise changed, the spiral carbon fiber resin composite skeleton can both provide rigid support and limit arbitrary deformation. At the same time, the spiral carbon fiber resin composite skeleton can extend along the deformation direction, thereby keeping pace with the deformation of the soft pipe, and providing rigid support in real time during the deformation process, thereby maintaining the shape of the soft pipe, such as the pipe diameter, stable. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The accompanying drawings in the specification, which constitute a part of the present invention, are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute improper limitations on the present invention.

[0018] Figure 1 It is a schematic diagram of the structure of a carbon fiber skeleton pipe for a medical ventilator in an embodiment of the present invention.

[0019] The marks in the figure represent: 1-soft pipe, 2-carbon fiber resin composite frame, 3-carbon fiber electric heating wire, 4-carbon fiber filter layer. DETAILED DESCRIPTION

[0020] It should be noted that the following detailed descriptions are illustrative and intended to provide further explanation of the present invention. Unless otherwise specified, all technical and scientific terms used in the present invention have the same meanings as those commonly understood by those skilled in the art to which the present invention belongs.

[0021] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit exemplary embodiments according to the present invention. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should also be understood that when the terms "comprise" and / or "include" are used in this specification, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof.

[0022] For the convenience of description, if the words "up", "down", "left" and "right" appear in the present invention, they only indicate that they are consistent with the up, down, left and right directions of the drawings themselves, and do not limit the structure. They are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the referred device or component needs to have a specific orientation, be constructed and operated in a specific orientation. Therefore, it cannot be understood as a limitation on the present invention.

[0023] Terminology explanation section: The terms "install", "connected", "connect", "fixed" and the like in the present invention should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral whole; it can be a mechanical connection, a direct connection, or an indirect connection through an intermediate medium; it can be an internal connection between two elements, or an interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to the specific circumstances.

[0024] As mentioned above, the breathing hose of some existing ventilators is prone to movement, entanglement or twisting during use, which not only accelerates the wear and aging of the ventilator hose, but also causes the connection between the hose and the breathing mask to loosen, causing hose extrusion and even causing poor breathing system; and water vapor is easy to condense in the breathing hose, affecting comfort. Therefore, the present invention proposes a carbon fiber skeleton pipe for a medical ventilator; the present invention is further described in conjunction with the drawings and specific embodiments of the specification.

[0025] First embodiment

[0026] A carbon fiber skeleton pipe for medical ventilator, reference Figure 1 It includes: a soft pipeline 1, a carbon fiber resin composite skeleton 2, a carbon fiber electric heating wire 3 and a carbon fiber filter layer 4.

[0027] The soft pipe 1 is a tubular structure with openings at both ends and a breathing passage. It is a resin elastomer soft pipe made of polyethylene, with a bending radius of 10 mm, an inner diameter of 5 mm, and an outer diameter of 9 mm.

[0028] The carbon fiber resin composite skeleton 2 and the carbon fiber electric heating wire 3 are both buried (the carbon fiber heating wire is pre-placed in the mold cavity for injection molding during the process of injection molding the soft pipe) in the pipe wall of the soft pipe 1, and the carbon fiber resin composite skeleton 2 and the carbon fiber electric heating wire 3 are both spirally wound on the soft pipe 1 along the axial direction of the soft pipe 1, and the carbon fiber resin composite skeleton 2 and the carbon fiber electric heating wire 3 are parallel. Among them, the carbon fiber resin composite skeleton is a flat belt composited with T300 high-strength carbon fiber and 30% (mass fraction) unsaturated polyester resin matrix, with a width of 2mm, a thickness of 1mm, and a spiral winding angle of 30°.

[0029] The carbon fiber electric heating wire 3 is a carbon fiber with a diameter of 0.5 mm, which can make the surface temperature of the soft pipe 1 reach about 35°C. The carbon fiber electric heating wire 3 has an electrode, which is led out of the soft pipe 1 by the carbon fiber electric heating wire 3. The electrode is connected to the power supply of the ventilator and used to make the heating wire heat up.

[0030] The carbon fiber filter layer 4 is filled in the breathing passage of the soft pipe 1. The filter layer is a flexible felt composed of short-cut activated carbon fibers, with a thickness of 0.5 mm and a specific surface area of ​​1000 m 2 / g, the porosity of the filter layer is 80%, and the surface pore size of the activated carbon fiber is 1nm.

[0031] Second embodiment

[0032] A carbon fiber skeleton pipe for a medical ventilator, the structure of which is the same as that of the first embodiment, except that:

[0033] The soft pipe 1 is a resin elastomer soft pipe made of polypropylene, with a bending radius of 30 mm, an inner diameter of 25 mm, and an outer diameter of 30 mm.

[0034] The carbon fiber resin composite skeleton 2 is a flat belt composited with T1000 high-strength carbon fiber and 50% silicone resin matrix, with a width of 5 mm, a thickness of 1.5 mm, and a spiral winding angle of 60°.

[0035] The carbon fiber electric heating wire 3 is a carbon fiber with a diameter of 1.0 mm, which can make the surface temperature of the soft pipe 1 reach about 37°C.

[0036] The carbon fiber filter layer 4 is a flexible felt composed of short-cut activated carbon fibers, with a thickness of 1.0 mm and a specific surface area of ​​3000 m 2 / g, the porosity of the filter layer is 95%, and the surface pore size of the activated carbon fiber is 4nm.

[0037] Third embodiment

[0038] A carbon fiber skeleton pipe for a medical ventilator, the structure of which is the same as that of the first embodiment, except that:

[0039] The soft pipe 1 is a resin elastomer soft pipe made of polyamide, with a bending radius of 30 mm, an inner diameter of 25 mm, and an outer diameter of 30 mm.

[0040] The carbon fiber resin composite skeleton 2 is a flat belt composited with T300 high-strength carbon fiber and 50% epoxy resin matrix, with a width of 4 mm, a thickness of 1.5 mm, and a spiral winding angle of 40°.

[0041] The carbon fiber electric heating wire 3 is a carbon fiber with a diameter of 0.8 mm, which can make the surface temperature of the soft pipe 1 reach about 36°C.

[0042] The carbon fiber filter layer 4 is a flexible felt composed of short-cut activated carbon fibers, with a thickness of 1.0 mm and a specific surface area of ​​1500 m 2 / g, the porosity of the filter layer is 85%, and the surface pore size of the activated carbon fiber is 3nm.

[0043] Fourth embodiment

[0044] A carbon fiber skeleton pipe for a medical ventilator, the structure of which is the same as that of the first embodiment, except that:

[0045] The soft pipe 1 is a resin elastomer soft pipe made of polyetheretherketone, with a bending radius of 20 mm, an inner diameter of 20 mm, and an outer diameter of 26 mm.

[0046] The carbon fiber resin composite skeleton 2 is a flat belt composited with T800 high-strength carbon fiber and 40% epoxy resin matrix, with a width of 4 mm, a thickness of 1.25 mm, and a spiral winding angle of 55°.

[0047] The carbon fiber electric heating wire 3 is a carbon fiber with a diameter of 0.9 mm, which can make the surface temperature of the soft pipe 1 reach about 36°C.

[0048] The carbon fiber filter layer 4 is a flexible felt composed of short-cut activated carbon fibers, with a thickness of 1.0 mm and a specific surface area of ​​2500 m 2 / g, the porosity of the filter layer is 90%, and the surface pore size of the activated carbon fiber is 3.5nm.

[0049] Fifth embodiment

[0050] A carbon fiber skeleton pipeline for a medical ventilator is different from the first embodiment in that the soft pipeline 1 of this embodiment is not provided with a carbon fiber electric heating wire 3.

[0051] Sixth embodiment

[0052] A carbon fiber skeleton pipeline for a medical ventilator is the same as the first embodiment, except that the soft pipeline 1 of this embodiment does not have a carbon fiber resin composite skeleton 2.

[0053] Performance Testing

[0054] 1. Install the carbon fiber skeleton pipes for medical ventilators of the first to fifth embodiments on the ventilator to simulate the condensation effect of water vapor, and the running time is 2 hours. The results show that there is no obvious condensed water vapor on the inner wall of the soft pipe 1 of the first to fourth embodiments, while obvious condensed water vapor appears on the inner wall of the soft pipe 1 of the fifth embodiment. Further, after calculating the changes in the mass of the five groups of carbon fiber skeleton pipes for medical ventilators before and after the test, the results show that the mass of the first to fourth embodiments increased by 0.31%, 0.27%, 0.44%, and 0.36%, respectively; and the mass of the fifth embodiment increased by 11.4%.

[0055] 2. The carbon fiber skeleton pipes for medical ventilators of the first to fourth embodiments and the sixth embodiment were bent repeatedly 100 times. The results showed that the carbon fiber skeleton pipes for medical ventilators of the first to fourth embodiments almost maintained their original shapes without obvious deformation, while the carbon fiber skeleton pipe for medical ventilators of the sixth embodiment had obvious creases and deformation at the bending parts.

[0056] Finally, it should be noted that any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention. Although the above describes the specific implementation of the present invention in conjunction with the drawings, it is not a limitation of the protection scope of the present invention. Those skilled in the art should understand that on the basis of the technical solution of the present invention, various modifications or deformations that can be made by those skilled in the art without creative labor are still within the protection scope of the present invention.

Claims

1. A carbon fiber skeleton pipe for a medical ventilator, characterized in that: include: A soft tube, which is a tubular structure with openings at both ends and a breathing passage; The carbon fiber resin composite skeleton and the carbon fiber electric heating wire are both buried in the wall of the soft pipeline, and the carbon fiber resin composite skeleton and the carbon fiber electric heating wire are both spirally wound on the soft pipeline along the axial direction of the soft pipeline; and the carbon fiber resin composite skeleton and the carbon fiber electric heating wire are parallel; A carbon fiber filter layer that fills the breathing channel of the soft tube, and The carbon fiber electric heating wire has an electrode, and the electrode is led out of the carbon fiber electric heating wire to the outside of the soft pipe; The carbon fiber resin composite skeleton is formed by compounding carbon fiber and thermosetting resin, and its shape is flat ribbon; The helical winding angle of the carbon fiber resin composite skeleton is 30°~60°; The resin content in the carbon fiber resin composite skeleton is controlled within a range of 30% to 50% of the total mass of the skeleton.

2. The carbon fiber skeleton pipe for medical ventilator according to claim 1, characterized in that: The material of the soft pipe is thermoplastic resin.

3. The carbon fiber skeleton pipe for medical ventilator according to claim 2, characterized in that: The material of the soft pipe is any one of polyethylene, polypropylene, polyvinyl chloride, polyamide, polyimide, polyether ketone, polyether ether ketone, polyphenylene sulfide, polyethylene terephthalate, and butylene terephthalate.

4. The carbon fiber skeleton pipe for medical ventilator according to claim 1, characterized in that: The bending radius of the soft pipe is within the range of 10-30 mm, the inner diameter is within the range of 5-25 mm, and the outer diameter is within the range of 9-30 mm.

5. The carbon fiber skeleton pipe for medical ventilator according to claim 4, characterized in that: The width of the carbon fiber rigid skeleton is controlled within the range of 2~5mm, and the thickness is controlled within the range of 1~1.5mm.

6. The carbon fiber skeleton pipe for medical ventilator according to claim 4, characterized in that: In the carbon fiber resin composite skeleton, the carbon fiber used includes any one of T300, T700, T800 and T1000.

7. The carbon fiber skeleton pipe for medical ventilator according to claim 1, characterized in that: In the carbon fiber resin composite skeleton, the thermosetting resin used includes any one of unsaturated polyester resin, epoxy resin, phenolic resin and silicone resin.

8. The carbon fiber skeleton pipe for medical ventilator according to claim 1, characterized in that: The carbon fiber electric heating wire is a flexible carbon fiber heating wire with a diameter of 0.5-1 mm. The heating wire leads out electrodes at both ends of the soft pipeline and is used in parallel with the ventilator connected to the power supply.

9. The carbon fiber skeleton pipe for medical ventilator according to claim 8, characterized in that: The flexible carbon fiber heating wire includes any one of T300, T700, T800 and T1000.

10. The carbon fiber skeleton pipe for medical ventilator according to claim 1, characterized in that: The thickness of the carbon fiber filter layer is controlled within the range of 0.5-1 mm, and the filter layer is a flexible felt composed of short-cut activated carbon fibers.

11. The carbon fiber skeleton pipe for medical ventilator according to claim 10, characterized in that: The specific surface area of ​​the chopped activated carbon fiber monofilament is 1000-3000m 2 / g, and the surface pore size of the chopped activated carbon fiber is 1~4nm.

12. The carbon fiber skeleton pipe for medical ventilator according to claim 1, characterized in that: The porosity of the carbon fiber filter layer is controlled within the range of 80% to 95%.

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