Carbon dioxide absorption device capable of carrying out heat-moisture exchange filtration and improving airflow

Abstract

The utility model discloses a carbon dioxide absorption device capable of exchanging heat and humidity, filtering and improving airflow, which comprises a tank body, a vertical partition plate is connected in the tank body and divides the tank body into a first air inlet cavity and a first air outlet cavity, the top of the tank body is further connected with a second air inlet cavity and a second air outlet cavity, and the bottom of the second air inlet cavity is communicated with the first air inlet cavity. The bottom of the second air outlet cavity communicates with the first air outlet cavity; the side faces of the second air inlet cavity and the second air outlet cavity are connected with a horizontal air inlet connector and a horizontal air outlet connector respectively, the first air inlet cavity and the first air outlet cavity are filled with carbon dioxide absorption particles, a first sponge layer is further arranged at the bottom of the tank body, and a gap is reserved between the bottom of the partition plate and the first sponge layer. The second sponge layer forms a space for heat and moisture exchange, so that water vapor and heat generated during reaction of carbon dioxide can be sufficiently retained in the space, flowing gas is sufficiently humidified and heated, and damage to the lung caused by dry and cold gas inhaled by a patient is reduced.

Description

Technical Field

[0001] The utility model belongs to the field of medical equipment, and in particular relates to a carbon dioxide absorption device capable of wet heat exchange filtration and improving airflow. Background Art

[0002] The carbon dioxide absorber is used to absorb carbon dioxide in the anesthesia circuit during fully closed low-flow inhalation anesthesia surgery to prevent the patient from repeatedly inhaling carbon dioxide and threatening the patient's life. It is an indispensable part of closed circuit anesthesia (or low-flow inhalation anesthesia).

[0003] The existing carbon dioxide absorbers have various tank shapes and structures. However, in actual use, due to structural and shape problems, the airflow direction is affected and uneven. The airflow often prefers to take the shortcut with the least resistance and the shortest path. As a result, only a part of the carbon dioxide absorbent inside can come into contact with the airflow, and thus it cannot react to absorb the carbon dioxide in the airflow.

[0004] At the same time, there is a type of product clinically used for heat and moisture exchange and filtering viruses and microorganisms when patients breathe. It mainly uses the moisture and temperature contained in the patient's exhaled gas, partially preserves it through absorbent paper or absorbent cotton, and partially mixes it into the patient's inhaled gas during the next inhalation. However, this method can only use the limited temperature and humidity of the patient's exhaled gas, and the effect is poor.

[0005] When adjusting the parameters of anesthesia machines and ventilators, there is an important parameter called airway pressure. When the airway pressure is too high, it will cause obvious damage to the patient's lungs, so the lower the airway resistance of the product structure in the breathing circuit, the better. If the existing carbon dioxide absorber is added with a filtering function, its main resistance comes from the filtering function. Therefore, it is necessary to reduce the ventilation resistance of the filtering function, thereby significantly improving the airway pressure of the overall breathing circuit. Utility Model Content

[0006] The purpose of the utility model is to provide a carbon dioxide absorption device capable of wet heat exchange filtration and airflow improvement, so as to fully humidify and heat the gas flowing through without using the heat and water vapor of the patient's exhaled gas, reduce the damage to the lungs caused by the patient's inhalation of dry and cold gas, and reduce ventilation resistance.

[0007] The purpose of the utility model is achieved through the following technical means: a carbon dioxide absorption device capable of wet heat exchange, filtration and air flow improvement, comprising a tank body, a vertical partition connected inside the tank body, dividing the tank body into a first air inlet cavity and a first air outlet cavity, a second air inlet cavity and a second air outlet cavity are also connected to the top of the tank body, the bottom of the second air inlet cavity is connected to the first air inlet cavity, and the bottom of the second air outlet cavity is connected to the first air outlet cavity; the sides of the second air inlet cavity and the second air outlet cavity are respectively connected with horizontal air inlet joints and air outlet joints, the first air inlet cavity and the first air outlet cavity are filled with carbon dioxide absorption particles, a first sponge layer is also provided at the bottom of the tank body, and a gap is left between the bottom of the partition and the first sponge layer.

[0008] A second sponge layer is disposed in the second air inlet cavity and the second air outlet cavity.

[0009] The air inlet connector and the air outlet connector are both horizontal pipes, one end of the air inlet connector is connected to the side of the second air inlet cavity and communicated with the second air inlet cavity, and the other end protrudes and extends outward; one end of the air outlet connector is connected to the side of the second air outlet cavity and communicated with the second air outlet cavity, and the other end protrudes and extends outward.

[0010] The ends of the air inlet joint and the air outlet joint that protrude outwards are both connected with sealing caps.

[0011] A KN filter layer is disposed on the upper portion of the first air outlet cavity, and the KN filter layer is located below the connection point between the second air outlet cavity and the first air outlet cavity.

[0012] The tank body is a cylinder.

[0013] The beneficial effects of the utility model are:

[0014] 1. Both the air inlet joint and the air outlet joint are convex exposed joints. Compared with the common internal plug joints, the sealing cap is easier to install and disassemble, and is more secure, which prevents the sealing cap from falling off and causing the carbon dioxide absorbent in the tank to come into contact with the air and cause failure.

[0015] 2. The second sponge layer at the inlet and outlet forms a space for moisture and heat exchange, which can fully retain the water vapor and heat generated by the carbon dioxide reaction, fully humidify and heat the gas flowing through without using the heat and water vapor of the patient's exhaled gas, reducing the damage to the lungs caused by the patient's inhalation of dry and cold gas.

[0016] 3. The filter layer adopts KN95 level filtration to effectively filter particulate bacteria and microorganisms in the gas. At the same time, it is placed before the outlet of the tank. Compared with placing it after the outlet, its filtration cross-sectional area is larger. Under the premise of ensuring filtration efficiency, it can effectively reduce ventilation resistance and reduce the ventilation pressure set by the anesthesia machine, effectively protect the patient's lungs, and reduce lung damage and complications.

[0017] 4. The tank body is a cylindrical structure. The second air inlet cavity and the second air outlet cavity for air entering and exiting the tank body are located at the relative center of the circular cross-section of the tank body and are equidistant from the inner wall of the tank body. At the same time, compared with square and other structures without edges and corners, the cylindrical shape has more uniform gaps between particles after loading the particles, more uniform spacing between particles and the inner wall of the tank body, and more consistent airflow distance, so that the airflow can pass through the tank body evenly without shortcuts (the channel with small resistance is a shortcut), so that all particles can fully contact and react with the airflow.

[0018] 5. There is a gap between the vertical partition of the tank and the first sponge layer at the bottom. Due to their different density resistances, a layer of structure is formed, which regulates the direction of the airflow and prevents the tank from being installed at an inclined angle. The airflow only takes a shortcut with less resistance, causing some particles to not come into contact with the airflow. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 The structure diagram of the low resistance carbon dioxide absorption device capable of heat and moisture exchange;

[0020] Figure 2 A top view of a low-resistance carbon dioxide absorption device capable of heat and moisture exchange;

[0021] In the figure, 1 is a tank body; 2 is a partition; 3 is a first air inlet cavity; 4 is a first air outlet cavity; 5 is a second air inlet cavity; 6 is a second air outlet cavity; 7 is an air inlet connector; 8 is an air outlet connector; 9 is a first sponge layer; 10 is a second sponge layer; 11 is a sealing cap; 12 is a KN filter layer;

[0022] The present invention will be further described in detail below with reference to the accompanying drawings and embodiments. DETAILED DESCRIPTION

[0023] [Example 1]

[0024] like Figure 1 As shown, a carbon dioxide absorption device capable of wet heat exchange, filtration and air flow improvement comprises a tank body 1, a vertical partition 2 is connected inside the tank body 1, and the tank body 1 is divided into a first air inlet chamber 3 and a first air outlet chamber 4, a second air inlet chamber 5 and a second air outlet chamber 6 are also connected to the top of the tank body 1, the bottom of the second air inlet chamber 5 is connected to the first air inlet chamber 3, and the bottom of the second air outlet chamber 6 is connected to the first air outlet chamber 4; the sides of the second air inlet chamber 5 and the second air outlet chamber 6 are respectively connected with a horizontal air inlet joint 7 and an air outlet joint 8, the first air inlet chamber 3 and the first air outlet chamber 4 are filled with carbon dioxide absorption particles, a first sponge layer 9 is also arranged at the bottom of the tank body 1, and a gap is left between the bottom of the partition 2 and the first sponge layer 9.

[0025] A first sponge layer 9 is laid at the bottom of the tank body 1, and a downward partition 2 is connected from the top of the tank body 1 to divide the space inside the tank body 1 into a first air inlet chamber 3 and a first air outlet chamber 4 in half. Since the partition 2 is not in direct contact with the first sponge layer 9 but leaves a distance between it and the first sponge layer 9, the first air inlet chamber 3 and the first air outlet chamber 4 are actually formed by dividing according to the partition 2 and its extension line.

[0026] There is a gap between the vertical partition 2 of the tank body 1 and the first sponge layer 9 at the bottom. Due to their different density resistances, a layer of structure is formed, which regulates the direction of the airflow and prevents the tank body 1 from being installed at an inclined angle, where the airflow only takes a shortcut with less resistance, causing some particles to not come into contact with the airflow.

[0027] The tank body 1 is a cylinder.

[0028] like Figure 2 As shown, in actual use, the second air inlet chamber 5 and the second air outlet chamber 6 are an integrated structure, and a large chamber is divided into two by a partition structure. At the same time, the partition structure here is also on the extension line of the partition 2, and the intersection of the diagonals of the large chamber is located at the center of the circular top surface of the tank body 1. In this way, the part of the second air inlet chamber 5 and the second air outlet chamber 6 that is connected to the tank body 1 is close to the center of the cross section of the tank body 1, and is equidistant from the inner wall of the tank body 1. At the same time, compared with a square structure and other structures without edges and corners, after the cylindrical shape is loaded with particles, the gaps between the particles are more uniform, the distance between the particles and the inner wall of the tank body 1 is more uniform, and the airflow flow distance is more consistent, so that the airflow can pass through the tank body 1 evenly without shortcuts (the channel with small resistance is the shortcut), so that all particles can fully contact and react with the airflow.

[0029] A gas inlet and outlet are arranged on the top of the tank body 1. Specifically, the right side of the second air inlet chamber 5 is connected to an air inlet connector 7 protruding to the right, and the bottom of the second air inlet chamber 5 is connected to the first air inlet chamber 3. The oxygen, anesthetic gas and carbon dioxide mixed therein delivered by the ventilator enter from the air inlet connector 7, and then enter the first air inlet chamber 3 through the second air inlet chamber 5. The carbon dioxide reacts with the carbon dioxide absorbent therein and is absorbed, while generating water vapor and heat.

[0030] The left side of the second air outlet cavity 6 is connected to the air outlet connector 8 protruding to the left, and the bottom of the second air outlet cavity 6 is connected to the first air outlet cavity 4. The gas delivered by the ventilator passes through the gaps between the carbon dioxide absorption particles under the partition 2 and the first sponge layer 9, enters the first air outlet cavity 4, and then moves upward. In the middle, the carbon dioxide absorbent still absorbs the remaining carbon dioxide, and then enters the second air outlet cavity 6, and is finally output to the patient through the threaded tube from the left side of the air outlet connector 8.

[0031] A second sponge layer 10 is disposed in the second air inlet cavity 5 and the second air outlet cavity 6 .

[0032] By arranging the second sponge layer 10 in the second air inlet cavity 5 and the second air outlet cavity 6, a space for heat and moisture exchange can be formed, so that the water vapor and heat generated when the carbon dioxide reacts can be fully retained here, and the gas flowing through can be fully humidified and heated without using the heat and water vapor of the patient's exhaled gas, thereby reducing the damage to the lungs caused by the patient's inhalation of dry and cold gas. (The gas exhaled by the patient is hot and humid gas, while the gas output by the ventilator and anesthesia machine is dry and cold gas. The heating and humidification effect of the second sponge layer 10 can reduce the damage to the patient's respiratory tract)

[0033] The air inlet connector 7 and the air outlet connector 8 are both horizontal pipes, one end of the air inlet connector 7 is connected to the side of the second air inlet cavity 5 and communicated with the second air inlet cavity 5, and the other end protrudes and extends outward; one end of the air outlet connector 8 is connected to the side of the second air outlet cavity 6 and communicated with the second air outlet cavity 6, and the other end protrudes and extends outward.

[0034] The outwardly protruding ends of the air inlet connector 7 and the air outlet connector 8 are both connected with sealing caps 11 .

[0035] There is a certain distance between the air inlet connector 7 and the air outlet connector 8 and the outer surface of the top of the tank body 1, so as to leave a position for the assembly opening of the sealing cap 11 connected to the outside.

[0036] Compared with the existing embedded structure, that is, there is a small cylinder inside a large cylinder, and this small cylinder is the interface, and the existing sealing cap has an actual sealing part equal to the inner diameter of the small cylinder, which is inserted into the small cylinder. This connection method is not stable and the sealing cap can easily fall off.

[0037] In the present application, an outwardly protruding interface is adopted, and the inner diameter of the sealing cap 11 matches the outer diameter of the joint cylinder, and is wrapped around the outside of the joint, so that the sealing cap 11 is not easy to fall off, and the installation and removal of the sealing cap 11 is more convenient.

[0038] A KN filter layer 12 is disposed on the upper portion of the first air outlet cavity 4 , and the KN filter layer 12 is located below the connection point between the second air outlet cavity 6 and the first air outlet cavity 4 .

[0039] KN filter layer 12 adopts KN95 level filtration to effectively filter out particulate bacteria and microorganisms in the gas.

[0040] It is located near the top of the first air outlet cavity 4 , with the carbon dioxide absorbing particles in the first air outlet cavity 4 below and the connection point between the second air outlet cavity 6 and the first air outlet cavity 4 above.

[0041] The KN filter layer 12 completely blocks the semicircular cross-section of the first air outlet cavity 4, and leaves a certain distance from the connecting point between the second air outlet cavity 6 and the first air outlet cavity 4, rather than being closely attached to the connecting point. Through such a structure, the filtering area is the semicircular cross-section of the first air outlet cavity 4, rather than the small opening at the connecting point. In this way, while ensuring the filtering efficiency, it can effectively reduce the ventilation resistance, reduce the ventilation pressure set by the anesthesia machine, effectively protect the patient's lungs, and reduce lung damage and complications.

[0042] In actual use, the KN filter layer 12 may also be arranged only at the same position as the first air inlet cavity 3 , or may be arranged at both the first air outlet cavity 4 and the first air inlet cavity 3 .

Claims

1. A carbon dioxide absorption device capable of heat and moisture exchange, filtration and air flow improvement, characterized in that: The tank body (1) comprises a tank body (1), wherein a vertical partition (2) is connected inside the tank body (1) to separate the tank body (1) into a first air inlet cavity (3) and a first air outlet cavity (4), and the top of the tank body (1) is also connected to a second air inlet cavity (5) and a second air outlet cavity (6). The bottom of the second air inlet cavity (5) is connected to the first air inlet cavity (3), and the bottom of the second air outlet cavity (6) is connected to the first air outlet cavity (4); the sides of the second air inlet cavity (5) and the second air outlet cavity (6) are respectively connected to a horizontal air inlet joint (7) and an air outlet joint (8); the first air inlet cavity (3) and the first air outlet cavity (4) are filled with carbon dioxide absorbing particles; a first sponge layer (9) is also provided at the bottom of the tank body (1); and a gap is left between the bottom of the partition plate (2) and the first sponge layer (9).

2. A carbon dioxide absorption device capable of wet heat exchange, filtration and airflow improvement according to claim 1, characterized in that: A second sponge layer (10) is provided in both the second air inlet cavity (5) and the second air outlet cavity (6).

3. A carbon dioxide absorption device capable of wet heat exchange, filtration and airflow improvement according to claim 1, characterized in that: The air inlet connector (7) and the air outlet connector (8) are both horizontal pipes; one end of the air inlet connector (7) is connected to the side of the second air inlet cavity (5) and communicates with the second air inlet cavity (5), and the other end protrudes and extends outward; one end of the air outlet connector (8) is connected to the side of the second air outlet cavity (6) and communicates with the second air outlet cavity (6), and the other end protrudes and extends outward.

4. A carbon dioxide absorption device capable of wet heat exchange, filtration and airflow improvement according to claim 3, characterized in that: A sealing cap (11) is connected to the outwardly protruding ends of the air inlet joint (7) and the air outlet joint (8).

5. The carbon dioxide absorption device capable of wet heat exchange, filtration and airflow improvement according to claim 1, characterized in that: A KN filter layer (12) is provided on the upper portion of the first air outlet cavity (4), and the KN filter layer (12) is located below the point where the second air outlet cavity (6) and the first air outlet cavity (4) are connected.

6. A carbon dioxide absorption device capable of wet heat exchange, filtration and airflow improvement according to claim 1, characterized in that: The tank body (1) is a cylinder.

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