A carbon dioxide absorber

Abstract

The utility model relates to the field of medical apparatus and instruments, particularly relates to a carbon dioxide absorber. The carbon dioxide absorber of the utility model includes outer tube, inner tube and center tube, and the one end center of outer tube is equipped with air inlet, and the other end center is equipped with gas outlet, and the one end of inner tube is open, and inner tube sets up in outer tube, and the other end of inner tube is equipped with the first filter interlayer of breathable between the one end of outer tube, and the other end of inner tube is equipped with the second filter interlayer of breathable between the one end and the other end of inner tube, and the one end of center tube and gas outlet are mutually inserted, and the other end of center tube and the other end of inner tube are in abutment, and the flow guide hole is limited between the other end of center tube and the other end of inner tube, and the third filter interlayer is equipped in gas outlet. Advantage: can limit the flow direction of gas through the absorption area of the roundabout distribution from outside to inside, thereby fully absorbing carbon dioxide in gas, and the utilization rate of absorption filler is higher.

Description

Technical Field

[0001] This utility model relates to the field of medical devices, and in particular to a carbon dioxide absorber. Background Technology

[0002] A carbon dioxide absorber is a device commonly used in respiratory, anesthesia, and emergency procedures to absorb the carbon dioxide exhaled by the patient, ensuring unobstructed breathing and normal gas exchange.

[0003] Clinically, common carbon dioxide absorbers typically have a cylindrical structure with an inlet and outlet at either end or the same end (e.g., the patent for the sterilization and humidification type carbon dioxide absorber, CN220878369U). Internally, they contain filter media (such as calcium lime) to absorb carbon dioxide. However, in clinical use, carbon dioxide absorbers are usually installed at an angle, connecting the pipes at both ends. The airflow inside follows a specific path, meaning a significant portion of the filter media does not come into contact with the gas, resulting in low utilization of the internal filter media.

[0004] In addition, some carbon dioxide filters, although designed with detours to increase the path of carbon dioxide, are actually mostly pipe-like detours that eventually lead to a large filter chamber. However, the airflow path in the filter chamber is also specific and cannot be well distributed to various parts of the filter chamber. Therefore, the utilization rate of the absorbent material in the filter chamber is still limited.

[0005] Therefore, it is necessary to develop a carbon dioxide absorber to overcome the aforementioned technical problems. Utility Model Content

[0006] The technical problem to be solved by this utility model is to provide a carbon dioxide absorber that effectively overcomes the defects of the prior art.

[0007] The technical solution of this utility model to solve the above-mentioned technical problems is as follows:

[0008] A carbon dioxide absorber includes an outer cylinder, an inner cylinder, and a central tube. The outer cylinder has an air inlet at one end and an air outlet at the other end. The inner cylinder is open at one end and is disposed within the outer cylinder. A permeable first filter layer is provided between the other end of the inner cylinder and one end of the outer cylinder. A permeable second filter layer is provided between one end of the inner cylinder and the other end of the outer cylinder. One end of the central tube is inserted into the air outlet, and the other end of the central tube abuts against the other end of the inner cylinder, defining a guide hole between them. A third filter layer is provided inside the air outlet. A first absorption zone is formed between the outer cylinder and the inner cylinder. A second absorption zone is formed between the inner cylinder and the central tube. A third absorption zone is formed inside the central tube. All three absorption zones are filled with carbon dioxide absorbent material.

[0009] Based on the above technical solution, the present invention can be further improved as follows.

[0010] Furthermore, the outer cylinder and the inner cylinder are coaxially arranged cylindrical or elliptical cylinders, and the central tube is a cylindrical tube coaxially distributed with the inner cylinder.

[0011] Furthermore, the first filter layer, the second filter layer, and the third filter layer mentioned above are all made of foam.

[0012] Furthermore, both the air inlet and outlet are equipped with perforated plates, and polyurethane filter sheets are provided on the inner side of the perforated plates.

[0013] Furthermore, multiple limiting strips are provided at intervals around the other end of the inner cylinder, and the limiting strips extend to contact the inner wall of the outer cylinder.

[0014] Furthermore, multiple limiting plates are provided at equal intervals at the center of the inner side of the other end of the inner cylinder, and the other end of the central tube is inserted into the multiple limiting plates.

[0015] Furthermore, a horizontal limiting portion is provided on the outer side of the aforementioned limiting piece, and the other end of the aforementioned central tube abuts against the aforementioned limiting portion. The other end of the aforementioned central tube, the other end of the aforementioned inner cylinder, and the plurality of the aforementioned limiting portions define a plurality of the aforementioned guide holes.

[0016] Furthermore, the aforementioned carbon dioxide absorption filler is calcium lime granules.

[0017] Furthermore, the outer cylinder includes a cylinder body and a cylinder cover. The cylinder body has an air inlet at the center of one end and an open end. The cylinder cover has an air outlet at the center and is sealed to the open end of the cylinder body.

[0018] Furthermore, one end of the aforementioned air outlet extends into the interior of the aforementioned outer cylinder, and one end of the aforementioned central tube is fitted onto one end of the aforementioned air outlet and abuts against the other end of the aforementioned outer cylinder.

[0019] The beneficial effects of this utility model are: the structural design is simple and reasonable. By using the design of the flow-blocking hood and the flow-diverting hole, the incoming gas can be evenly dispersed in the main shell, thereby improving the utilization rate of the carbon dioxide absorption packing in the main shell, reducing the cost of consumables, and reducing the frequency of packing replacement. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the carbon dioxide absorber of this utility model without packing material.

[0021] Figure 2 This is a schematic diagram of the carbon dioxide absorber of this utility model with packing material.

[0022] The attached diagram lists the components represented by each number as follows:

[0023] 1. Outer cylinder; 2. Inner cylinder; 3. Central tube; 4. First filter layer; 5. Second filter layer; 6. Third filter layer; 7. Carbon dioxide absorption packing; 11. Air inlet; 12. Air outlet; 21. Limiting strip; 22. Limiting plate; 31. Guide hole; 111. Cylinder body; 112. Cylinder cover. Detailed Implementation

[0024] The principles and features of this utility model are described below with reference to the accompanying drawings. The examples given are only for explaining this utility model and are not intended to limit the scope of this utility model.

[0025] Example

[0026] like Figure 1 and 2 As shown, the carbon dioxide absorber of this embodiment includes an outer cylinder 1, an inner cylinder 2, and a central tube 3. An air inlet 11 is provided at the center of one end of the outer cylinder 1, and an air outlet 12 is provided at the center of the other end. One end of the inner cylinder 2 is open and is disposed inside the outer cylinder 1. A first air-permeable filter layer 4 is provided between the other end of the inner cylinder 2 and one end of the outer cylinder 1. A second air-permeable filter layer 5 is provided between one end of the inner cylinder 2 and the other end. One end of the central tube 3 is inserted into the air outlet 12, and the other end of the central tube 3 abuts against the other end of the inner cylinder 2, with a guide hole 31 defined between them. A third filter layer 6 is provided inside the air outlet 12. A first absorption zone is formed between the outer cylinder 1 and the inner cylinder 2. A second absorption zone is formed between the inner cylinder 2 and the central tube 3. A third absorption zone is formed inside the central tube 3. Carbon dioxide absorption packing 7 is filled in the first, second, and third absorption zones.

[0027] In this embodiment, the gas flow path of the carbon dioxide absorber during use is as follows: inlet 11 -- first absorption zone (between outer cylinder 1 and inner cylinder 2) -- second absorption zone (between inner cylinder 2 and central tube 3) -- third absorption zone (inside central tube 3) -- outlet 12. Throughout the process, after the airflow enters the absorber through inlet 11, it is evenly dispersed into the first absorption zone through the first filter layer 4, then evenly enters the second absorption zone through the second filter layer 5, then enters the central tube 3 through the guide hole 31, and finally exits through the third filter layer 6 and the outlet 12. The carbon dioxide absorption packing 7 in the three absorption zones can fully contact the flowing gas and absorb the carbon dioxide. Through the special internal design, the airflow path is limited, and the carbon dioxide absorption packing 7 is distributed along the path, resulting in a very good absorption effect and a high utilization rate of the packing.

[0028] In this embodiment, the outer cylinder 1 and the inner cylinder 2 are coaxially arranged cylindrical or elliptical cylinders, and the central tube 3 is a cylindrical tube coaxially distributed with the inner cylinder 2.

[0029] In this embodiment, the first filter layer 4, the second filter layer 5, and the third filter layer 6 are all made of foam. Using foam material can filter out large particles of dust from the carbon dioxide absorption filler 7.

[0030] In this embodiment, both the air inlet 11 and the air outlet 12 are equipped with perforated plates (represented by k in the figure), and polyurethane filter cotton sheets (represented by a in the figure) are provided on the inner side of the perforated plates. The perforated plates support the relatively soft polyurethane filter cotton sheets, and the polyurethane filter cotton sheets can filter out small particulate dust in the carbon dioxide absorption packing 7 that flows out with the gas, ensuring that the dust content of the gas entering the subsequent pipeline meets the standards.

[0031] In a preferred embodiment, a plurality of limiting strips 21 are provided at intervals around the other end of the inner cylinder 2, and the limiting strips 21 extend to contact the inner wall of the outer cylinder 1.

[0032] In the above implementation scheme, the limiting strip 21 contacts the inner wall of the outer cylinder 1 from multiple directions, thereby limiting the orientation of the inner cylinder 2 and preventing the inner cylinder 2 from shaking in the outer cylinder 1. Combined with the limiting effect of the first filter layer 4 and the second filter layer 5 at both ends, the inner cylinder 2 will not shift.

[0033] In this embodiment, a plurality of limiting pieces 22 are provided at equal intervals around the center of the inner side of the other end of the inner cylinder 2, and the other end of the central tube 3 is inserted into the plurality of limiting pieces 22. The design of the plurality of limiting pieces 22 limits the installation position of the central tube 3, and it will not shift after installation.

[0034] In this embodiment, a horizontal limiting portion is provided on the outer side of the limiting piece 22, and the other end of the central tube 3 abuts against the limiting portion. Multiple flow guide holes 31 are defined between the other end of the central tube 3, the other end of the inner cylinder 2, and the multiple limiting portions. The design of the limiting portion ensures that the other end of the central tube 3 does not abut against the other end of the inner cylinder 2, and the multiple gaps between them define the flow guide holes 31. This ingenious design eliminates the need for additional openings.

[0035] In this embodiment, the carbon dioxide absorption filler 7 is calcium lime granules.

[0036] In a preferred embodiment, the outer cylinder 1 includes a cylinder body 111 and a cylinder cover 112. The cylinder body 111 has an air inlet 11 at the center of one end and an open end. The cylinder cover 112 has an air outlet 12 at the center and is sealed to the open end of the cylinder body 111.

[0037] In the above implementation scheme, the outer cylinder 1 adopts a split design, which facilitates the filling of the internal packing. During assembly, the first filter layer 4 (and polyurethane filter cotton sheet) is installed first, then the inner cylinder 2 is installed, followed by the central tube 3, then the second filter layer 5 is installed, and carbon dioxide absorption packing 7 is filled in. The third filter layer 6 (and polyurethane filter cotton sheet) is installed in the air outlet 12. Finally, the cylinder cover 112 is closed to complete the assembly. The disassembly and assembly are relatively convenient and quick.

[0038] In this embodiment, one end of the air outlet 12 extends into the interior of the outer cylinder 1, and one end of the central tube 3 is fitted onto one end of the air outlet 12 and abuts against the other end of the outer cylinder 1. This design further enables the central tube 3 to be positioned and installed, preventing displacement during use.

[0039] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0040] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this utility model, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0041] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0042] In this utility model, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0043] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0044] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention.

Claims

1. A carbon dioxide absorber characterized by: The system includes an outer cylinder (1), an inner cylinder (2), and a central tube (3). The outer cylinder (1) has an air inlet (11) at the center of one end and an air outlet (12) at the center of the other end. The inner cylinder (2) is open at one end and is located inside the outer cylinder (1). A permeable first filter layer (4) is provided between the other end of the inner cylinder (2) and one end of the outer cylinder (1). A permeable second filter layer (5) is provided between one end of the inner cylinder (2) and the other end. One end of the central tube (3) is connected to the outer cylinder (1). The air outlets (12) are interlocked, the other end of the central tube (3) abuts against the other end of the inner cylinder (2), and a guide hole (31) is defined between them. A third filter layer (6) is provided inside the air outlet (12). A first absorption zone is formed between the outer cylinder (1) and the inner cylinder (2). A second absorption zone is formed between the inner cylinder (2) and the central tube (3). A third absorption zone is formed inside the central tube (3). Carbon dioxide absorption packing (7) is filled in the first absorption zone, the second absorption zone and the third absorption zone.

2. A carbon dioxide absorber according to claim 1, characterised in that: The outer cylinder (1) and the inner cylinder (2) are coaxially arranged cylindrical or elliptical cylinders, and the central tube (3) is a cylindrical tube coaxially distributed with the inner cylinder (2).

3. A carbon dioxide absorber according to claim 1, wherein: The first filter layer (4), the second filter layer (5) and the third filter layer (6) are all made of foam.

4. A carbon dioxide absorber according to claim 3, wherein: Both the air inlet (11) and the air outlet (12) are provided with perforated plates, and polyurethane filter cotton sheets are provided on the inner side of the perforated plates.

5. A carbon dioxide absorber according to claim 1, wherein: The other end of the inner cylinder (2) is provided with a plurality of limiting strips (21) spaced around it, and the limiting strips (21) extend to contact the inner wall of the outer cylinder (1).

6. A carbon dioxide absorber according to claim 1, wherein: The inner cylinder (2) has multiple locating plates (22) spaced at equal intervals at the center of the inner side of the other end, and the other end of the central tube (3) is inserted into the multiple locating plates (22).

7. A carbon dioxide absorber according to claim 6, wherein: The outer side of the limiting piece (22) is provided with a horizontal limiting part, the other end of the central tube (3) abuts against the limiting part, and the other end of the central tube (3) defines a plurality of the guide holes (31) between the other end of the central tube (3), the other end of the inner cylinder (2), and the plurality of the limiting parts.

8. A carbon dioxide absorber according to claim 1, wherein: The carbon dioxide absorption filler (7) is calcium lime granules.

9. A carbon dioxide absorber according to any one of claims 1 to 8, characterised in that: The outer cylinder (1) includes a cylinder body (111) and a cylinder cover (112). The cylinder body (111) has an air inlet (11) at the center of one end and an open end. The cylinder cover (112) has an air outlet (12) at the center. The cylinder cover (112) is sealed and fitted to the open end of the cylinder body (111).

10. A carbon dioxide absorber according to any one of claims 1 to 8, characterised in that: One end of the air outlet (12) extends into the interior of the outer cylinder (1), and one end of the central tube (3) is fitted onto one end of the air outlet (12) and abuts against the other end of the outer cylinder (1).

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