Carbon dioxide adsorption filtering device based on soda lime

Abstract

The invention relates to the field of separation and filtration, in particular to a soda lime-based carbon dioxide adsorption and filtration device, which comprises a box body, the box body is communicated with a gas inlet channel and a gas outlet channel, and an adsorption and filtration assembly positioned in the box body is communicated between the gas inlet channel and the gas outlet channel; through gradient cooperation of the multiple layers of adsorption beds and the multiple stages of adsorbent particles, the overall stacking density of the adsorbent particles can be effectively reduced, meanwhile, the utilization rate of the adsorbent particles is increased, the overall adsorption efficiency is improved, the service life of the adsorbent is prolonged, and the more uniform adsorption effect is achieved; and through the turbulent flow frame between the two adjacent adsorption beds, the blown-in air flow is prevented from directly impacting the adsorption beds, and the generation of dust in the use process is effectively reduced.

Description

Technical Field

[0001] The present invention relates to the field of separation and filtration, and particularly to a carbon dioxide adsorption and filtration device based on soda lime. Background Art

[0002] Currently, in medical and industrial applications, carbon dioxide adsorption and filtration is an important link to ensure air quality and achieve respiratory system safety. Especially in the field of anesthesia, the application of carbon dioxide adsorption and filtration devices is particularly important. The main goal of these devices is to absorb the carbon dioxide exhaled by patients while filtering out harmful substances in the air to ensure the breathing safety of patients and operating room personnel. Traditional carbon dioxide adsorption and filtration methods rely on activated carbon or different types of chemical adsorbents. However, due to the limited adsorption capacity and selectivity of activated carbon, frequent replacement is often required, increasing costs and maintenance complexity.

[0003] With the development of technology, technicians in related fields have also carried out a large number of optimizations on the technical means for carbon dioxide adsorption and filtration. For more accurate comparison, for example, a Chinese patent with publication number CN220779598U discloses a carbon dioxide adsorption device, including a box body, a first chamber, a water-absorbing sponge, a second chamber, a third chamber, a filter sponge, etc. When in use, the carbon dioxide and water vapor in the gas exhaled by the patient are effectively adsorbed and filtered through the water-absorbing sponge, carbon dioxide adsorbent, filter sponge, and activated carbon layer arranged in the box body. At the same time, the water vapor generated during the adsorption process and the dust in the adsorbent are also adsorbed and removed, ensuring the anesthetic effect and preventing the internal machine components of the anesthesia machine from being damaged.

[0004] However, there are still some deficiencies in the above adsorption device during actual use:

[0005] The above device drives the gas exhaled by the patient to pass through the first chamber, the water-absorbing sponge, the second chamber, the third chamber, and the fourth chamber and then be discharged. During this process, only by piling up a large number of adsorbent particles in the second chamber to form an adsorption bed, and then inputting gas into it through the gas transmission pipes inserted in several adsorption beds, and the carbon dioxide in the gas is adsorbed and filtered through the contact between the gas and the adsorbent particles. During its use, since several gas transmission pipes are relatively fixedly limited in the second chamber, after the gas escapes from several gas transmission pipes, due to the large accumulation of adsorbent particles, the airflow cannot effectively contact the adsorbent particles piled up in the second chamber, and the mutually piled adsorbent particles will also hinder the passage of the airflow, making the overall contact area between the airflow in the gas transmission pipes and the adsorbent particles limited after flowing into the second chamber, resulting in different overall utilization rates of the adsorbent particles in the second chamber, increasing the time required for subsequent staff to organize and replace them.

[0006] Therefore, under the above - stated viewpoints, there is still room for improvement in the existing technical means for adsorbing carbon dioxide in gases. Summary of the Invention

[0007] To solve the above problems, the present invention provides a carbon dioxide adsorption and filtration device based on soda lime, which includes a box body. An intake channel and an outlet channel are connected to the box body. Between the intake channel and the outlet channel, an adsorption and filtration component located inside the box body is connected in common. The adsorption and filtration component includes:

[0008] A mounting seat, which is connected to the inside of the box body corresponding to the intake channel. A gas - guiding channel is formed on the mounting seat and is connected to the intake channel in communication;

[0009] A mounting cylinder, which is connected to the mounting seat. An air inlet is opened thereon and is connected to the gas - guiding channel and the intake channel in communication. Inside the mounting cylinder, a plurality of adsorption beds are arranged along its axial direction. The adsorption beds are filled with soda - lime - based adsorbent for adsorbing and filtering carbon dioxide in the gas entering the mounting cylinder;

[0010] A gas - guiding pipe, which is limitedly penetrated through all the adsorption beds and passes through the mounting cylinder and corresponds to the outlet channel on the box body.

[0011] Preferably, a plurality of adsorption sponges are limitedly connected in the gas - guiding channel at the mounting seat for pre - adsorbing and treating the gas blown into the gas - guiding channel.

[0012] Preferably, the plurality of adsorption sponges are sequentially enclosed to form a "mouth" - shaped frame channel and then are limited at the gas - guiding channel on the mounting seat to guide the passing air flow.

[0013] Preferably, the plurality of adsorption beds are arranged at intervals along the axis of the mounting cylinder. A plurality of turbulence - generating frames are limitedly sleeved on the gas - guiding pipe corresponding to the intervals between adjacent two adsorption beds.

[0014] Preferably, the turbulence - generating frame includes a mounting ring sleeve limitedly sleeved on the gas - guiding pipe. A plurality of turbulence - generating blades are uniformly connected to the outer circumference of the mounting ring sleeve. The turbulence - generating blades are all set at an inclined angle.

[0015] Preferably, the gas - guiding pipe is hollow inside and has an open end. The open end passes through the mounting cylinder and corresponds to and communicates with the outlet channel. A plurality of air - permeable holes are circumferentially opened on the gas - guiding pipe so that the gas adsorbed and filtered inside the mounting cylinder can be introduced into the gas - guiding pipe.

[0016] Preferably, a filter box is limitedly connected inside the gas - guiding pipe. The filter box is filled with activated carbon to further filter and adsorb the adsorbed gas.

[0017] Preferably, a plurality of discharge ports are circumferentially opened on the mounting cylinder. The discharge ports are correspondingly arranged between adjacent two adsorption beds.

[0018] Preferably, an impeller located at the air guide channel is sleeved on the air guide pipe.

[0019] Preferably, a plurality of flow guiding plates are arranged on the mounting base corresponding to the air guide channel and the air inlet channel. The plurality of flow guiding plates are formed by surrounding a plurality of adsorption sponges and present a closed-mouth shape.

[0020] In summary, the present application includes at least one of the following beneficial technical effects:

[0021] First, through the cooperation between a plurality of adsorption sponges and the air guide channel on the mounting base, the warm and moist air blown into the box by the patient is guided to flow through the plurality of adsorption sponges and the air guide channel. The adsorption sponges effectively adsorb the water vapor in the warm and moist air, avoiding the interference of water vapor on the carbon dioxide adsorption process and improving the overall adsorption efficiency.

[0022] Second, through the gradient cooperation of the multi-layer adsorption beds and the multi-stage adsorbent particles provided in the present invention, while effectively reducing the overall bulk density of the adsorbent particles, the utilization rate of the adsorbent particles is also improved, the overall adsorption efficiency is increased, the service life of the adsorbent is extended, a more uniform adsorption effect is achieved, and through the turbulence frame between adjacent two adsorption beds, the blown air flow is prevented from directly impacting the adsorption bed, effectively reducing the generation of dust during use.

[0023] Third, the impeller drives the air guide pipe and the turbulence frame to rotate, driving the dust and water vapor to rotate and shift around the air guide pipe, forcing the dust and water vapor generated during the adsorption process to be discharged from the discharge port of the installation cylinder, avoiding the irregular caking of water vapor and dust at the combination of the installation cylinder and affecting the air flow through efficiency.

[0024] Fourth, through the cooperation between the heat conducting sheet, the heat conducting support sheet and the cavity on the mounting base, the heat released during the adsorption process in the installation cylinder is guided into the cavity, causing the air in the cavity to be heated. After the cavity is heated, due to the cavity covering the plurality of adsorption sponges, the plurality of adsorption sponges are heated, accelerating the drying and regeneration effect of the adsorption sponges, enabling the adsorption sponges to continuously and effectively adsorb water vapor. Description of the Drawings

[0025] The present invention will be further described below with reference to the drawings and embodiments.

[0026] Figure 1 is a schematic structural diagram of the present invention.

[0027] Figure 2 is a schematic cross-sectional structure diagram of the box body of the present invention.

[0028] Figure 3 is a schematic structural diagram of the adsorption and filtration assembly of the present invention.

[0029] Figure 4 It is a schematic structural diagram of the air guiding channel of the present invention.

[0030] Figure 5 It is a schematic structural diagram of the flow disturbing rack of the present invention.

[0031] Figure 6 It is a schematic structural diagram of the flow guiding plate of the present invention.

[0032] Figure 7 is the present invention Figure 6 An enlarged view of A in.

[0033] Figure 8 It is a schematic structural diagram of the cavity on the mounting base of the present invention.

[0034] In the figure, 1, box body; 10, air inlet channel; 11, air outlet channel; 2, adsorption and filtration assembly; 20, mounting base; 200, air guiding channel; 21, mounting cylinder; 210, air inlet; 22, adsorption bed; 23, air guiding pipe; 230, ventilation hole; 24, adsorption sponge; 25, flow disturbing rack; 250, mounting ring sleeve; 251, flow disturbing blade; 252, impeller; 26, filter box; 27, discharge port; 28, flow guiding plate; 29, heat conducting sheet; 290, heat conducting support sheet; 291, heat dissipation fin; 292, cavity. Specific embodiments

[0035] The following is a detailed description of the embodiments of the present invention in conjunction with the attached Figure 1 to the attached Figure 8 to the attached drawings.

[0036] The embodiment of the present application discloses a carbon dioxide adsorption and filtration device based on soda lime. The present application is mainly applied in the process of adsorbing and filtering carbon dioxide in gas, and achieves the effect of adsorbing and filtering carbon dioxide in the exhaled gas of patients through the soda lime-based adsorbent in terms of technical effects; especially in the process of adsorption and filtration, through the guidance of the air guiding channel and the setting of multi-level adsorption beds, while effectively reducing the overall bulk density of the soda lime-based, it also improves the efficiency of its adsorption and filtration of carbon dioxide; further, the present application also realizes accelerating the drying and regeneration of the adsorption sponge through the cooperation between the heat conducting sheet, the heat conducting support sheet and the cavity on the mounting base, so that the adsorption sponge can continuously and effectively adsorb water vapor.

[0037] Embodiment 1: Refer to Figure 1 and Figure 2As shown in the figure, a carbon dioxide adsorption and filtration device based on soda lime includes a cylindrical box body 1 with a hollow interior. An air inlet channel 10 and an air outlet channel 11 are connected to the box body 1. An adsorption and filtration component 2 located inside the box body 1 is commonly connected between the air inlet channel 10 and the air outlet channel 11. When in use, gas is introduced into the adsorption and filtration component 2 inside the box body 1 through the air inlet channel 10. After the adsorption and filtration component 2 adsorbs and filters carbon dioxide in the gas, the filtered gas is guided to be discharged through the air outlet channel 11, achieving the effect of adsorbing and filtering carbon dioxide in the gas.

[0038] Refer to Figures 2 to 4 As shown in the figure, that is, the adsorption and filtration component 2 for adsorbing carbon dioxide in the gas; specifically, the adsorption and filtration component 2 includes:

[0039] A mounting seat 20, which is correspondingly connected to the inside of the box body 1 with respect to the air inlet channel 10. A gas guiding channel 200 is formed on the mounting seat 20 and is connected to the air inlet channel 10.

[0040] A mounting cylinder 21, which is connected to the mounting seat 20. An air inlet 210 is formed thereon and is connected to the gas guiding channel 200 and the air inlet channel 10. A plurality of adsorption beds 22 are arranged along the axial direction of the mounting cylinder 21. Soda lime-based adsorbents are contained in the adsorption beds 22 for adsorbing and filtering carbon dioxide in the gas entering the mounting cylinder 21.

[0041] An air duct 23 is limitedly penetrated through all the adsorption beds 22 and passes through the mounting cylinder 21 and corresponds to the air outlet channel 11 on the box body 1.

[0042] When in use, the gas blown into the box body 1 is guided to be introduced into the mounting cylinder 21 through the air inlet channel 10, the gas guiding channel 200, and the air inlet 210. Then, after the gas passes through a plurality of adsorption beds 22 in the mounting cylinder 21, the adsorbent adsorbs and filters carbon dioxide in the gas, achieving the effect of filtering the gas. Finally, the adsorbed and filtered gas is discharged through the air duct 23 and the air outlet channel 11.

[0043] It should be noted that the soda lime-based adsorbent is an existing medical chemical agent for adsorbing carbon dioxide. It is mainly composed of particles such as sodium hydroxide, calcium hydroxide, and sodium carbonate. The carbon dioxide in the gas is adsorbed by the reaction of these particles with carbon dioxide in the gas. These are all conventional existing technical means and will not be elaborated here.

[0044] Refer to Figures 3 to 6As shown, since the gas exhaled by the patient is usually a warm and moist airflow, that is, an airflow with a certain temperature and humidity, during the process of adsorbing and filtering it through the soda lime-based adsorbent, the warm and moist water vapor in the airflow will interfere with the efficiency and effect of the adsorption and filtration. Therefore, in order to avoid the occurrence of the above problems, a number of adsorption sponges 24 are connected in a limited way in the air guide channel 200 at the mounting base 20, for pre-adsorbing the gas blown into the air guide channel 200. During use, the gas blown into the intake channel 10 and the air guide channel 200 will first pass through a number of adsorption sponges 24 at the air guide channel 200. Due to the characteristics of the sponge such as being porous and hydrophilic, when the warm and moist airflow passes through the adsorption sponges 24, the water vapor in it will be adsorbed by the adsorption sponges 24, thus realizing the adsorption of the water vapor in the warm and moist airflow and completing the effect of dehumidifying the airflow blown into the mounting cylinder 21 for pretreatment.

[0045] Furthermore, in order to improve the effect of the adsorption sponges 24 in adsorbing and filtering the water vapor in the warm and moist airflow, the air inlet 210 on the mounting cylinder 21 is arranged on the side far from the intake channel 10, so as to increase the flow path of the warm and moist airflow introduced into the mounting cylinder 21, that is, to increase the contact time between the warm and moist airflow and a number of adsorption sponges 24.

[0046] Refer to Figures 4 to 6 As shown, a number of adsorption sponges 24 are sequentially enclosed to form a "mouth"-shaped frame channel, and then are limited at the air guide channel 200 between the mounting base 20 and the box body 1 to guide the passing airflow. At the same time, the air guide pipe 23 passes through two horizontally corresponding adsorption sponges 24 and corresponds to the air outlet channel 11.

[0047] During use, the warm and moist airflow blown into the air guide channel 200 will flow through the middle of the frame formed by enclosing a number of adsorption sponges 24, and then enter the mounting cylinder 21 through the air inlet 210 to be adsorbed and filtered. When the airflow passes through the frame channel formed by enclosing a number of adsorption sponges 24, it will continuously contact a number of adsorption sponges 24, and at the same time effectively increase the contact area between the warm and moist airflow and the adsorption sponges 24, significantly improving the effect of removing the water vapor in the warm and moist airflow.

[0048] Refer to Figure 5 and Figure 6As shown, during the process that the air flow passes through several adsorption beds 22 and is discharged through the air duct 23, it will continuously impact several adsorbent particles in the adsorption bed 22, resulting in collisions between the adsorbent particles and the adsorption bed 22 or between adjacent adsorbent particles, thereby increasing the generation of adsorbent particle dust during use. Usually, during the process of adsorbing carbon dioxide in the gas by the adsorbent particles, some water vapor will also be generated. At this time, if the adsorbent dust in the adsorption bed 22 increases, although it can accelerate the adsorption rate of carbon dioxide to a certain extent, it will also lead to an increase in water vapor during the adsorption process. After the water vapor contacts the adsorbent dust therein, it will cause irregular agglomeration of the adsorbent dust, affecting the air flow through efficiency and also resulting in accidental loss of the adsorbent, increasing the economic cost. To avoid the occurrence of the above problems, several adsorption beds 22 are arranged at intervals along the axis of the installation cylinder 21, and a plurality of flow disturbance frames 25 are sleeved on the air duct 23 at intervals corresponding to the intervals between adjacent two adsorption beds 22. During use, through the interference of the flow disturbance frames 25 between adjacent two adsorption beds 22, when the gas passes through the adsorption bed 22, it will first contact the flow disturbance frames 25 and then pass through the adsorption bed 22 to be adsorbed and filtered, effectively avoiding the direct impact of the air flow on the adsorption bed 22.

[0049] Referring to Figure 5 As shown, the flow disturbance frame 25 includes a mounting ring sleeve 250 sleeved on the air duct 23, and a plurality of flow disturbance vanes 251 are circumferentially and evenly connected to the outer side of the mounting ring sleeve 250, and the flow disturbance vanes 251 are all set at an inclined angle.

[0050] During use, during the process that the air flow passes through several adsorption beds 22, it will first contact the flow disturbance vanes 251 between adjacent two adsorption beds 22. Due to the inclined setting of the flow disturbance vanes 251, most of the air flow will blow obliquely towards the adsorption bed 22 along the inclination of the flow disturbance vanes 251 after contacting the flow disturbance vanes 251, thereby avoiding the direct impact of the air flow on the adsorption bed 22 and effectively avoiding the generation of dust during the use of the adsorbent.

[0051] Furthermore, in order to improve the utilization efficiency of the adsorbent in the adsorption bed 22 and avoid the accumulation of dust during use, the adsorbent particles in several adsorption beds 22 are preferably arranged from large to small, that is, the adsorbent particles in one of the adsorption beds 22 near the air inlet 210 are the largest volume particles, and then gradually decrease to the smallest volume particles one by one. Through the setting of multiple adsorption beds 22 and multiple levels of adsorbent particles, the effect of effectively reducing the bulk density of the adsorbent and improving the utilization efficiency of the adsorbent is achieved.

[0052] Referring to Figure 5 and Figure 6As shown, the air duct 23 is hollow inside and has an open end. Its open end passes through the installation tube 21 and is connected to the air outlet channel 11. A plurality of air holes 230 are opened circumferentially on the air duct 23 to allow the gas adsorbed and filtered in the installation tube 21 to be introduced into the air duct 23.

[0053] Reference Figures 5 to 7 As shown, a filter box 26 is limitedly connected to the air guide tube 23, and activated carbon is installed in the filter box 26 to further filter and adsorb the adsorbed gas. The activated carbon in the filter box 26 adsorbs the adsorbed gas to further filter and adsorb the gas, and at the same time removes the odor in the gas, thereby improving the effect of filtering and adsorbing the gas.

[0054] Reference Figures 5 to 7 As shown, in the process of adsorbing carbon dioxide in the gas by soda lime adsorbent, some dust and water vapor will inevitably be generated as the adsorption process proceeds. In order to prevent the dust and water vapor in the adsorption process from interfering with the adsorption process, a plurality of discharge ports 27 are opened circumferentially on the mounting cylinder 21, and the discharge ports 27 are correspondingly arranged between two adjacent adsorption beds 22. When in use, during the process of airflow passing through the adsorption bed 22 upward, the dust and water vapor generated at the adsorption bed 22 are driven upward by the airflow to separate from the adsorption bed 22, and then suspended between the two adjacent adsorption beds 22.

[0055] Further, refer to Figure 6 and Figure 7 As shown, in order to facilitate the discharge of dust and water vapor suspended between two adjacent adsorption beds 22, an impeller 252 located at the air guide channel 200 is sleeved on the air guide pipe 23, and the air guide pipe 23 is rotatably penetrated on the mounting seat 20, the mounting cylinder 21, the adsorption sponge 24 and a plurality of adsorption beds 22. When in use, by driving the impeller 252 to rotate, the impeller 252 rotates to drive the air guide pipe 23 to rotate, and the air guide pipe 23 rotates to drive all the connected mounting rings 250 and spoiler blades 251 to rotate synchronously, and the spoiler blades 251 rotate to drive the water vapor and dust to rotate and shift with the air guide pipe 23 as the axis, so that the dust and water vapor applied between the two adjacent adsorption beds 22 have a tendency to separate from the mounting cylinder 21 from the discharge port 27, so as to drive the generated dust and water vapor to be discharged from the mounting cylinder 21.

[0056] Furthermore, refer to Figure 5 and Figure 6As shown in the figure, a number of flow guiding plates 28 are provided on the mounting base 20 corresponding to the air guiding channel 200 and the air inlet channel 10. The number of flow guiding plates 28 are formed by surrounding a number of adsorption sponges 24. The number of flow guiding plates 28 are enclosed in a converging shape, and the converging end faces the impeller 252, so as to guide and concentrate the blown air flow. Through the guidance of the number of flow guiding plates 28 enclosed in a converging shape, the air flow blown by the patient into the air guiding channel 200 is effectively guided and concentrated to blow towards the impeller 252 in the air guiding channel 200, so as to drive the impeller 252 and the air duct 23 as a whole to rotate, thereby discharging the dust and water vapor between two adjacent adsorption beds 22.

[0057] Embodiment 2: Refer to Figures 5 to 8 As shown in the figure, on the basis of Embodiment 1, during the process of adsorbing and filtering carbon dioxide in the gas by the soda lime base, since the adsorbent particles (such as sodium hydroxide, calcium hydroxide, and sodium carbonate particles) release heat during the reaction process of adsorbing carbon dioxide, the temperature of the adsorption bed 22 will increase. The increase in temperature will accelerate the reaction rate and increase the adsorption rate of carbon dioxide; however, too high a temperature may promote the desorption of the adsorbent, resulting in the re-release of the adsorbed carbon dioxide into the air flow. At the same time, too high a temperature will also cause the structure of the adsorbent particles to change at high temperatures, thereby accelerating the aging process of the adsorbent and gradually losing its adsorption capacity.

[0058] Therefore, based on the above, a number of heat conducting sheets 29 are circumferentially and limit-connected to the mounting base 20. Heat conducting support sheets 290 penetrating through the mounting cylinder 21 are connected to the heat conducting sheets 29 corresponding to a number of adsorption beds 22. One end of the heat conducting support sheet 290 far from the connected heat conducting sheet 29 is inserted into the mounting cylinder 21 and contacts the high-temperature gas in the mounting cylinder 21. At the same time, one end of the heat conducting sheet 29 far from the connected heat conducting support sheet 290 is also connected to a heat dissipation fin 291 passing through the box body 1, so as to transfer the heat on the heat conducting sheet 29 to the air, and realize the heat dissipation treatment of the heat conducting sheet 29, the heat conducting support sheet 290, and the inside of the mounting cylinder 21.

[0059] During use, after the heat is released during the reaction process of the adsorbent, the heat is dissipated from the mounting cylinder 21 and the box body 1 through a number of heat conducting support sheets 290, heat conducting sheets 29, and heat dissipation fins 291. The heat transfer between a number of heat dissipation fins 291 and the outside air realizes the effect of conducting heat and dissipating heat from the high-temperature environment inside the mounting cylinder 21.

[0060] Of course, as an optional implementation method, multiple heat dissipation fins 291 can be added as needed.

[0061] Furthermore, refer to Figures 5 to 8As shown in the figure, a cavity 292 is formed inside the mounting base 20 near the air guiding channel 200. The cavity 292 is arranged corresponding to the air guiding channel 200 and wraps the frame formed by a plurality of adsorption sponges 24 therein. At the same time, one end of the heat conducting sheet 29 is inserted into the cavity 292.

[0062] During use, after the heat conducting support sheet 290 is heated inside the mounting cylinder 21, it transfers heat to the connected heat conducting sheet 29. A part of the heat on the heat conducting sheet 29 exchanges heat with the outside through the connected heat dissipating fin 291, forming an effect of heat conduction and dissipation for it. Another part of the heat is transferred to the air inside the cavity 292 on the mounting base 20 through the heat conducting sheet 29, heating the air inside the cavity 292. After the cavity 292 is heated, due to the wrapping of the cavity 292 around a plurality of adsorption sponges 24, the adsorption sponges 24 at this time are heated, accelerating the drying and regeneration effect of the adsorption sponges 24.

[0063] At the same time, as the patient continuously blows in gas, the airflow blown in by the patient is concentrated through the guiding of a plurality of guide plates 28, forming a certain flow rate through a plurality of adsorption sponges 24. The airflow continuously passes through the channels at the adsorption sponges 24, taking away the adsorbed water vapor, so that the surface of the adsorption sponges 24 is continuously exposed to new water vapor molecules, maintaining an efficient adsorption state. Due to the continuous action of the airflow and the heating effect of the hot air inside the cavity 292 on the adsorption sponges 24, the adsorption sponges 24 are not easily saturated with adsorption, and can continuously and effectively adsorb water vapor, increasing the dehumidification pretreatment effect on the gas blown in by the patient.

[0064] During operation: In the first step, drive the warm and moist airflow (with a certain temperature and humidity) exhaled by the patient to enter the box body 1 through the air inlet channel 10, and then guide the warm and moist airflow into the mounting cylinder 21 through the air guiding channel 200 to be adsorbed and filtered by the adsorbent, and sequentially pass through a plurality of adsorption sponges 24 for pretreatment.

[0065] In the second step, perform dehumidification pretreatment on the warm and moist airflow through a plurality of adsorption sponges 24 limited at the air guiding channel 200. At the same time, set the air inlet 210 on the mounting cylinder 21 away from the air inlet channel 10, extend the flow path of the warm and moist airflow, increase the contact time between the airflow and the adsorption sponges 24, and improve the dehumidification effect.

[0066] In the third step, the airflow after dehumidification pretreatment enters the mounting cylinder 21 through the air inlet 210, and then sequentially passes through a plurality of adsorption beds 22. The adsorption beds 22 are filled with sodium lime-based adsorbent, which chemically reacts with carbon dioxide to achieve the adsorption and filtration effect of carbon dioxide, and then guide the filtered airflow to be discharged through the air guide pipe 23.

[0067] It is obvious to those skilled in the art that the present invention is not limited to the details of the above-described exemplary embodiments, and that the present invention can be implemented in other specific forms without departing from the spirit or essential characteristics of the present invention. Therefore, in all respects, the embodiments should be regarded as exemplary and non-limiting.

[0068] In addition, it should be understood that although this specification is described in terms of embodiments, not every embodiment only contains an independent technical solution. This narrative manner of the specification is only for clarity. Those skilled in the art should regard the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A carbon dioxide adsorption and filtration device based on soda lime, comprising a box body (1), characterized in that: An air inlet passage (10) and an air outlet passage (11) are communicated with the described box body (1). An adsorption and filtration assembly (2) located inside the box body (1) is communicated between the air inlet passage (10) and the air outlet passage (11). The adsorption and filtration assembly (2) includes: A mounting seat (20), which is connected inside the box body (1) corresponding to the air inlet passage (10). A gas guiding passage (200) is formed on the mounting seat (20) and communicated with the air inlet passage (10). A mounting cylinder (21), which is connected to the mounting seat (20). An air inlet (210) is provided thereon and communicated with the gas guiding passage (200) and the air inlet passage (10). A plurality of adsorption beds (22) are arranged along the axial direction of the mounting cylinder (21). A soda lime-based adsorbent is contained in the adsorption beds (22) to adsorb and filter carbon dioxide in the gas entering the mounting cylinder (21). A gas guide pipe (23), which is limitedly penetrated through all the adsorption beds (22) and corresponds to the air outlet passage (11) on the mounting cylinder (21) and the box body (1).

2. The carbon dioxide adsorption and filtration device based on soda lime according to claim 1, characterized in that: A plurality of adsorption sponges (24) are limitedly connected in the gas guiding passage (200) at the mounting seat (20) for pre-adsorbing and processing the gas blown into the gas guiding passage (200).

3. The carbon dioxide adsorption and filtration device based on soda lime according to claim 2, wherein: A plurality of the adsorption sponges (24) are sequentially enclosed to form a "mouth"-shaped frame passage, and then limited at the gas guiding passage (200) on the mounting seat (20) to guide the passing air flow.

4. The carbon dioxide adsorption and filtration device based on soda lime according to claim 1, characterized in that: A plurality of the adsorption beds (22) are arranged at intervals along the axis of the mounting cylinder (21). A plurality of turbulence frames (25) are limitedly sleeved on the gas guide pipe (23) corresponding to the intervals between adjacent two adsorption beds (22).

5. A carbon dioxide adsorption and filtration device based on soda lime according to claim 4, characterized in that: The turbulence frame (25) includes a mounting ring sleeve (250) limitedly sleeved on the gas guide pipe (23). A plurality of turbulence vanes (251) are circumferentially and uniformly connected to the outer side of the mounting ring sleeve (250). The turbulence vanes (251) are all arranged at an inclined angle.

6. The carbon dioxide adsorption and filtration device based on soda lime according to claim 1, characterized in that: The gas guide pipe (23) is hollow inside and has an open end. The open end penetrates through the mounting cylinder (21) and corresponds to the air outlet passage (11) for communication. A plurality of air permeable holes (230) are circumferentially formed on the gas guide pipe (23) to introduce the gas adsorbed and filtered in the mounting cylinder (21) into the gas guide pipe (23).

7. The carbon dioxide adsorption and filtration device based on soda lime according to claim 1, wherein: A filter box (26) is limitedly connected in the gas guide pipe (23). Activated carbon is contained in the filter box (26) to further filter and adsorb the adsorbed gas.

8. A carbon dioxide adsorption and filtration device based on soda lime according to claim 1, characterized in that: A plurality of discharge ports (27) are circumferentially formed on the mounting cylinder (21). The discharge ports (27) are correspondingly arranged between adjacent two adsorption beds (22).

9. The carbon dioxide adsorption and filtration device based on soda lime according to claim 1, characterized in that: An impeller (252) is sleeved on the gas guide pipe (23) at the gas guiding passage (200).

10. The carbon dioxide adsorption and filtration device based on soda lime according to claim 2, characterized in that: A plurality of flow guiding plates (28) are arranged on the mounting seat (20) corresponding to the gas guiding passage (200) and the air inlet passage (10). The plurality of flow guiding plates (28) are formed corresponding to the enclosure of a plurality of adsorption sponges (24) and present a closed-mouth shape.

Images