Carbon dioxide absorption tank and anesthesia machine

Abstract

The utility model provides a carbon dioxide absorption tank and an anaesthesia machine, the carbon dioxide absorption tank comprises a tank body, the tank body is provided with an air inlet, an air outlet, a main cavity, a first chamber and a second chamber, the air inlet, the main cavity, the first chamber, the second chamber and the air outlet are communicated in sequence, and the air inlet and the air outlet are arranged at an interval; the first chamber and the second chamber are both arranged in the tank body, and the main chamber is configured to contain a carbon dioxide absorbent; a through hole is formed in the bottom wall of the main cavity and communicates with the main cavity and the first cavity, and a second cavity is jointly defined by the side wall of part of the main cavity and the peripheral side wall of the tank body.

Description

Technical Field

[0001] The present application relates to the technical field of medical devices, and in particular to a carbon dioxide absorption tank and an anesthesia machine. Background Art

[0002] An anesthesia machine is an instrument that uses inhalation anesthesia to perform general anesthesia. The anesthesia machine provides anesthetic gas to the patient through a breathing circuit. At present, in order to prevent the patient from repeatedly inhaling carbon dioxide in the exhaled gas in the circulating gas circuit, a carbon dioxide absorption tank is connected to the breathing circuit of the anesthesia machine to remove carbon dioxide from the patient's exhaled gas. However, the airway structure of the existing carbon dioxide absorption tank is complicated, resulting in large airway resistance and easy blockage. Utility Model Content

[0003] The present application provides a carbon dioxide absorption tank and anesthesia machine, which can solve the problem that the gas path of the existing carbon dioxide absorption tank is easily blocked.

[0004] In a first aspect, the present application provides a carbon dioxide absorption tank, comprising a tank body, the tank body having an air inlet, an air outlet, a main cavity, a first chamber, and a second chamber, the air inlet, the main cavity, the first chamber, the second chamber, and the air outlet are sequentially connected, and the air inlet and the air outlet are arranged at intervals;

[0005] The main cavity, the first chamber and the second chamber are all arranged inside the tank body, and the main cavity is configured to accommodate a carbon dioxide absorbent; a through hole is provided on the bottom wall of the main cavity, and the through hole connects the main cavity and the first chamber, and part of the side wall of the main cavity and the peripheral side wall of the tank body together form the second chamber.

[0006] In one embodiment, the main cavity has a first opening, the first opening is arranged away from the first chamber, the tank body further comprises a top cover, the top cover is detachably mounted on the first opening and seals the first opening. The air inlet is arranged on the top cover.

[0007] In one embodiment, the tank body further includes a bottom cover, and the bottom wall of the main cavity, the bottom cover and a portion of the peripheral side wall of the tank body together form the first chamber.

[0008] In one embodiment, the bottom cover includes a water accumulation surface, the water accumulation surface faces the first chamber, the water accumulation surface is a conical surface, and protrudes in a direction away from the first chamber, and the bottom cover is provided with a drainage hole, which is opened at the apex of the water accumulation surface and passes through the bottom cover.

[0009] In one embodiment, the first chamber has a second opening, the second opening is arranged away from the main chamber, and the bottom cover is detachably mounted on the second opening and seals the second opening.

[0010] In one embodiment, the carbon dioxide absorption tank further includes a storage box having a storage cavity, and the carbon dioxide absorbent is accommodated in the storage cavity; the storage box is installed in the main cavity, and the storage cavity is communicated with the main cavity.

[0011] In one embodiment, a handle is provided on the top wall of the storage box.

[0012] In one embodiment, the material storage box further has a plurality of first air holes and a plurality of second air holes, the plurality of first air holes are arranged on the top wall of the material storage box and are spaced apart from each other, the plurality of second air holes are arranged on the bottom wall of the material storage box and are spaced apart from each other, and the first air holes, the storage cavity and the second air holes are connected in sequence;

[0013] Along the height direction of the tank body, the first air vent is disposed opposite to and communicated with the air inlet, and the second air vent is disposed opposite to and communicated with the through hole.

[0014] In one embodiment, the carbon dioxide absorption tank also includes a sealing ring, which is sealed between the bottom wall of the main cavity and the bottom wall of the storage box, and the sealing ring surrounds the through hole in the orthographic projection of the bottom wall of the main cavity, and the sealing ring surrounds the plurality of second air holes in the orthographic projection of the bottom wall of the storage box.

[0015] In one embodiment, the peripheral side wall of the tank body is made of a transparent material.

[0016] In one embodiment, the carbon dioxide absorption tank further includes a hand-held handle, and the hand-held handle is connected to the outer surface of the tank body.

[0017] In a second aspect, the present application provides an anesthesia machine, comprising a carbon dioxide absorption tank and a breathing circuit, wherein the breathing circuit is configured to deliver anesthetic gas to a patient and return gas exhaled by the patient, and the breathing circuit comprises a first pipe and a second pipe, wherein the first pipe is connected to the air inlet, and the second pipe is connected to the air outlet.

[0018] In summary, the carbon dioxide absorption tank provided in the present application simplifies the gas path structure of the carbon dioxide absorption tank and reduces the resistance to gas circulation by setting an air inlet, a main chamber, a first chamber and a second chamber that are connected in sequence. At the same time, the main chamber and the second chamber are separated by the side wall of the main chamber, and the main chamber and the first chamber are separated by the bottom wall of the main chamber, which simplifies the structure of the carbon dioxide absorption tank and reduces the processing cost of the carbon dioxide absorption tank. At the same time, the gas path structure of the carbon dioxide absorption tank is further simplified and the resistance to gas circulation is reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solution of the present application, the drawings required for use in the implementation manner will be briefly introduced below. Obviously, the drawings described below are only some implementation manners of the present application. For ordinary technicians in this field, other drawings can be obtained from these drawings without paying any creative work.

[0020] Figure 1 A partial structural schematic diagram of an anesthesia machine provided in an embodiment of the present application;

[0021] Figure 2 for Figure 1 The structural schematic diagram of the carbon dioxide absorption tank shown;

[0022] Figure 3 for Figure 2 An exploded structural diagram of the carbon dioxide absorption tank is shown;

[0023] Figure 4 for Figure 2 The cross-sectional schematic diagram of the carbon dioxide absorption tank along the AA direction is shown;

[0024] Figure 5 for Figure 4 A schematic cross-sectional view of the housing and the hand-held handle shown;

[0025] Figure 6 for Figure 3 The structural schematic diagram of the bottom cover shown;

[0026] Figure 7 for Figure 3 Schematic diagram of the structure of the sealing ring shown. DETAILED DESCRIPTION

[0027] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0028] See also Figure 1 , Figure 1 A schematic diagram of the partial structure of the anesthesia machine provided in an embodiment of the present application.

[0029] The present application provides an anesthesia machine, which includes a carbon dioxide absorption tank 100 and a breathing circuit 200, wherein the breathing circuit 200 is connected to the carbon dioxide absorption tank 100. The anesthesia machine delivers anesthetic gas to a patient through the breathing circuit 200, recovers gas exhaled by the patient, and removes carbon dioxide in the patient's exhaled gas through the carbon dioxide absorption tank 100 connected to the breathing circuit 200.

[0030] The breathing circuit 200 includes a first pipe 210 and a second pipe 220, and the breathing circuit 200 is connected to the carbon dioxide absorption tank 100 through the first pipe 210 and the second pipe 220. The first pipe 210 is configured to transport the gas exhaled by the patient from the breathing circuit 200 to the carbon dioxide absorption tank 100, and the second pipe 220 is configured to transport the gas purified by the carbon dioxide absorption tank 100 back to the breathing circuit 200. Exemplarily, the first pipe 210 and the second pipe 220 can be silicone tubes.

[0031] See also Figure 2 , Figure 2 for Figure 1 The structural schematic diagram of the carbon dioxide absorption tank 100 is shown.

[0032] In this embodiment, the carbon dioxide absorber 100 includes a tank body and a hand grip 10, and the hand grip 10 is connected to the outer surface of the tank body. The hand grip 10 is convenient for carrying and moving the carbon dioxide absorber 100, and is also convenient for installing and removing the carbon dioxide absorber 100 from the anesthesia machine.

[0033] Please also read Figure 3 , Figure 4 and Figure 5 , Figure 3 for Figure 2 The exploded structural diagram of the carbon dioxide absorption tank 100 is shown in FIG. Figure 4 for Figure 2 The cross-sectional schematic diagram of the carbon dioxide absorption tank 100 along the AA direction is shown. Figure 5 for Figure 4 A schematic cross-sectional view of the housing 70 and the handle 10 is shown.

[0034] like Figure 2 and Figure 4 As shown, the tank body has an air inlet 20, an air outlet 60, a main cavity 30, a first chamber 40, and a second chamber 50. The air inlet 20, the main cavity 30, the first chamber 40, the second chamber 50, and the air outlet 60 are sequentially connected; the main cavity 30, the first chamber 40, and the second chamber 50 are all arranged inside the tank body, the main cavity 30 is configured to accommodate a carbon dioxide absorbent, and the air inlet 20 and the air outlet 60 are arranged at intervals. Figure 1 As shown, the first pipe 210 of the breathing circuit 200 is in communication with the air inlet 20, and the second pipe 220 is in communication with the air outlet 60. For example, the carbon dioxide absorbent may be soda lime.

[0035] The gas exhaled by the patient is transmitted to the air inlet 20 of the tank body through the first pipe 210 of the breathing circuit 200, and enters the main cavity 30. The carbon dioxide absorbent configured in the main cavity 30 can remove the carbon dioxide in the patient's exhaled gas. Then, the gas purified by the carbon dioxide absorbent passes through the first chamber 40, the second chamber 50 and the air outlet 60 in sequence, enters the second pipe 220 of the breathing circuit 200, and is transported back to the patient through the breathing circuit 200 to form a circulating gas path. The carbon dioxide absorption tank 100 provided in the embodiment of the present application has a simple gas path structure, which is conducive to reducing the circulation resistance of the carbon dioxide absorption tank 100 to the circulating gas and reducing the risk of gas blockage.

[0036] In this embodiment, Figure 3 and Figure 4 As shown, the tank body includes a shell 70, a top cover 81 and a bottom cover 82. The top cover 81 is detachably mounted on the top of the shell 70, and the bottom cover 82 is detachably mounted on the bottom of the shell 70. Figure 5 As shown, the housing 70 includes a peripheral side wall 71, a first inner wall 72, and a second inner wall 73. In this embodiment, the handle 10 is connected to the outer surface of the peripheral side wall 71. The first inner wall 72, the second inner wall 73, and a portion of the peripheral side wall 71 together form a main cavity 30, the main cavity 30 has a first opening 31, and the first opening 31 is arranged away from the first cavity 40; the first inner wall 72 and a portion of the peripheral side wall 71 together form a first cavity 40, the first cavity 40 has a second opening 41, and the second opening 41 is arranged away from the main cavity 30; the second inner wall 73 and a portion of the peripheral side wall 71 together form a second cavity 50. It can be understood that the first inner wall 72 is the bottom wall of the main cavity 30, and the first inner wall 72 is spaced between the main cavity 30 and the first cavity 40; the second inner wall 73 is a portion of the side wall of the main cavity 30, and the second inner wall 73 is spaced between the main cavity 30 and the second cavity 50.

[0037] The first inner wall 72 includes a first surface 721 and a second surface 722, which are arranged opposite to each other along the thickness direction of the first inner wall 72, the first surface 721 faces the main cavity 30, and the second surface 722 faces the first chamber 40. The first inner wall 72 is provided with a through hole 723, which penetrates the first inner wall 72 along the thickness direction and connects the main cavity 30 and the first chamber 40. Exemplarily, there can be a plurality of through holes 723, which are arranged at intervals and are used to ensure gas flow between the main cavity 30 and the first chamber 40. From the center to the edge direction of the first inner wall 72, the plurality of through holes 723 can be arranged radially. The through holes 723 are arranged in the middle area of ​​the first inner wall 72. In other words, the edge area of ​​the first inner wall 72 is not provided with the through holes 723 to prevent the gas from flowing out directly from the peripheral side of the carbon dioxide absorbent, that is, the edge part of the first inner wall 72, without passing through the carbon dioxide absorbent.

[0038] like Figure 4 As shown, the carbon dioxide absorption tank 100 provided in the embodiment of the present application, by setting a first chamber 40 and a second chamber 50 connected between the main chamber 30 and the gas outlet 60, allows the gas purified by the carbon dioxide absorbent in the main chamber 30 to flow into the breathing circuit 200 more smoothly. At the same time, the main chamber 30 and the first chamber 40 are separated by a first inner wall 72, and the main chamber 30 and the second chamber 50 are separated by a second inner wall 73, which simplifies the structure of the outer shell 70 of the carbon dioxide absorption tank 100, saves the processing steps of the outer shell 70 of the carbon dioxide absorption tank 100, reduces the processing cost of the outer shell 70 of the carbon dioxide, and further simplifies the gas path structure of the carbon dioxide absorption tank 100, reducing the resistance to gas circulation.

[0039] like Figure 3 and Figure 4 As shown, in this embodiment, the top cover 81 is detachably mounted on the first opening 31 and seals the first opening 31 to prevent external gas from entering the main chamber 30 and reacting with the carbon dioxide absorbent in the main chamber 30, rendering the carbon dioxide absorbent ineffective. The air inlet 20 is disposed on the top cover 81 and communicates with the main chamber 30. Figure 3 As shown, in this embodiment, the air inlet 20 is arranged in the middle area of ​​the top cover 81, so that the external gas can fully contact with the carbon dioxide absorbent after entering the main cavity 30, thereby improving the absorption efficiency of the carbon dioxide absorbent. The second inner wall 73 and part of the peripheral side wall 71 protrude outward to form the air outlet 60, that is, the air outlet 60 can be arranged at the top of the shell 70 and communicate with the second chamber 50. The air inlet 20 and the air outlet 60 are both arranged at the top of the tank body and are arranged at intervals, which is conducive to the carbon dioxide absorption tank 100 being connected to the first pipeline 210 and the second pipeline 220 of the breathing circuit 200 through the air inlet 20 and the air outlet 60, respectively, so that the assembly of the carbon dioxide absorption tank 100 and the breathing circuit 200 is more compact, and the space occupied by the anesthesia machine is reduced.

[0040] Please also read Figure 6 , Figure 6 for Figure 3 The structural schematic diagram of the bottom cover 82 is shown.

[0041] like Figure 4 and Figure 6As shown, in this embodiment, the bottom cover 82 is detachably mounted on the second opening 41 and seals the second opening 41 to prevent external gas from entering the main chamber 30 and reacting with the carbon dioxide absorbent in the main chamber 30, rendering the carbon dioxide absorbent ineffective. The bottom cover 82 includes a water accumulation surface 821, and the water accumulation surface 821 faces the first chamber 40. In this embodiment, the first chamber 40 is arranged at the bottom of the tank body. When the patient's exhaled gas enters the first chamber 40 located at the bottom of the tank body after being purified by the carbon dioxide absorbent in the main chamber 30, the water vapor in the patient's exhaled gas and the liquid generated by the reaction of the exhaled gas and the carbon dioxide absorbent will be deposited on the water accumulation surface 821 of the bottom cover 82 due to gravity after condensation, and stored in the first chamber 40. It can be understood that the first chamber 40 is configured to store the liquid generated by the exhaled gas, so that the gas transferred back to the breathing circuit 200 from the carbon dioxide absorber 100 is drier, the gas composition is purer, and the carbon dioxide absorber 100 has a more significant purification effect on the patient's exhaled gas.

[0042] Exemplarily, the bottom cover 82 may be provided with a first mounting tube 822, which is provided at the water accumulation surface 821 and penetrates the bottom cover 82 in the thickness direction and extends toward the first inner wall 72. The bottom cover 82 also includes a screw (not shown). The first inner wall 72 may be provided with a second mounting tube 724, which is provided at the second surface 722 and extends toward the water accumulation surface 821, and the second mounting tube 724 has a thread, and the thread is located on the inner surface of the second mounting tube 724. The second mounting tube 724 is docked with the first mounting tube 822, and the screw passes through the first mounting tube 822 and is inserted into the second mounting tube 724 from the side of the bottom cover 82 away from the first chamber 40, and the screw is threadedly connected with the second mounting tube 724 to fix the bottom cover 82 to the bottom of the housing 70, so as to form a detachable connection between the bottom cover 82 and the housing 70. The number of the first mounting tube 822 , the second mounting tube 724 , and the screws can be multiple, and the number of the first mounting tube 822 , the second mounting tube 724 , and the screws are the same.

[0043] Exemplarily, the water accumulation surface 821 may be a conical surface and protrude in a direction away from the first chamber 40. The bottom cover 82 is provided with a drainage hole 823, which is opened at the vertex of the water accumulation surface 821 and penetrates the bottom cover 82, that is, the drainage hole 823 connects the first chamber 40 with the external space. It can be understood that the vertex of the water accumulation surface 821 is the lowest point, and the liquid accumulated on the water accumulation surface 821 will move toward the vertex along the conical water accumulation surface 821 due to its own gravity. Moreover, the drainage hole 823 is arranged at the vertex of the water accumulation surface 821, so the accumulated liquid on the water accumulation surface 821 can actively migrate to the drainage hole 823 located at the vertex due to its own weight and discharge the first chamber 40 through the drainage hole 823, thereby avoiding the liquid accumulated in the first chamber 40 from being retained on the water accumulation surface 821 and unable to be discharged in time, thereby polluting the gas flowing through the first chamber 40.

[0044] Furthermore, the tank body also includes a sealing piston (not shown), which is detachably mounted on the drain hole 823 and seals the drain hole 823. It can be understood that the sealing piston is configured to seal the drain hole 823 to ensure that the gas exhaled by the patient will not leak from the drain hole 823, and when the accumulated water in the first chamber 40 reaches a certain amount, or is stored for a certain period of time, the sealing piston can be removed from the drain hole 823 to facilitate the discharge of the accumulated water in the first chamber 40, to prevent the accumulated water from clogging the first chamber 40 and affecting the gas circulation, or to prevent the accumulated water from being stored for too long and contaminating the gas flowing through the first chamber 40. Furthermore, as Figure 5 As shown, the first inner wall 72 is provided with a limiting tube 725, which is arranged on the second surface 722, extends toward the water accumulation surface 821, and is arranged opposite to the drainage hole 823. The limiting tube 725 is provided with a limiting groove 726, which penetrates the tube wall of the limiting tube 725. The sealing piston is provided with a buckle, which is arranged on the outer peripheral surface of the sealing piston. The sealing piston passes through the drainage hole 823 from the side of the bottom cover 82 away from the first chamber 40 and is inserted into the limiting tube 725. The buckle of the sealing piston is clamped in the limiting groove 726 of the limiting tube 725 to limit the translation and rotation of the sealing piston in the radial and axial directions, further enhancing the installation stability and sealing performance of the sealing piston.

[0045] Further, the peripheral side wall 71 of the tank body can be made of a transparent material to facilitate observation of the carbon dioxide absorption of the carbon dioxide absorbent in the storage box 91. Among them, after the carbon dioxide absorbent absorbs carbon dioxide, a chemical reaction will occur to cause the carbon dioxide absorbent to change color, and the degree of change in the color of the carbon dioxide absorbent can roughly reflect the amount of carbon dioxide it has absorbed, that is, it can roughly show the remaining service life of the carbon dioxide absorbent. Through the transparent peripheral side wall 71 of the tank body, the user can observe the color of the carbon dioxide absorbent in the main cavity 30, and then accurately judge whether the carbon dioxide absorbent in the storage box 91 has expired and whether the storage box 91 needs to be replaced. At the same time, the peripheral side wall 71 of the tank body is made of a transparent material, which is also convenient for the accumulation of liquid in the first chamber 40. Through the transparent peripheral side wall 71 of the tank body, the user can promptly find out whether the accumulation of liquid in the first chamber 40 is too much, and accurately judge whether it is necessary to remove the sealing piston to discharge the liquid in the first chamber 40. Exemplarily, the outer peripheral surface of the peripheral side wall 71 can also be provided with scale lines to accurately determine the amount of liquid accumulated in the first chamber 40.

[0046] In this embodiment, Figure 3 and Figure 4As shown, the carbon dioxide absorption tank 100 also includes a storage box 91. The storage box 91 has a storage chamber 911, and the carbon dioxide absorbent is contained in the storage chamber 911. The storage box 91 also includes a top wall 912 and a bottom wall 913, and the top wall 912 and the bottom wall 913 are arranged opposite to each other along the height direction of the storage box 91. The storage box 91 is installed in the main cavity 30, the top wall 912 faces the top cover 81, and the bottom wall 913 faces the first inner wall 72. The storage box 91 is provided with a first air vent 914 and a second air vent 915. The first air vent 914 is provided on the top wall 912, and penetrates the top wall 912 along the thickness direction of the top wall 912, and the second air vent 915 is provided on the bottom wall 913, and penetrates the bottom wall 913 along the thickness direction of the bottom wall 913. Along the height direction of the storage box 91, the first air hole 914, the storage cavity 911 and the second air hole 915 are connected in sequence, and the first air hole 914 is arranged opposite to and connected to the air inlet 20, and the second air hole 915 is arranged opposite to and connected to the through hole 723 of the first inner wall 72. After the patient's exhaled gas enters the main cavity 30 through the air inlet 20, it enters the storage cavity 911 of the storage box 91 through the first air hole 914 to react with the carbon dioxide absorbent. The reacted gas leaves the storage cavity 911 through the second air hole 915 and enters the first chamber 40 through the through hole 723. In a possible embodiment, the storage box 91 is provided with a handle (not shown), which is provided on the top wall 912 of the storage box 91.

[0047] In the carbon dioxide absorption tank 100 provided in the embodiment of the present application, after the carbon dioxide absorbent loses its absorption capacity after being used for a period of time, the top cover 81 can be removed, and the storage box 91 storing the expired carbon dioxide absorbent can be taken out from the main cavity 30 through the first opening 31 by the handle. After replacing the new storage box 91, the top cover 81 can be reinstalled on the first opening 31 and sealed. The carbon dioxide absorption tank 100 provided in the embodiment of the present application simplifies the replacement steps of the carbon dioxide absorbent by providing a detachable top cover 81 and a detachable storage box 91, reduces the difficulty of replacing the carbon dioxide absorbent, and enables the carbon dioxide absorption tank 100 to be sustainably utilized, significantly improves the service life of the carbon dioxide absorption tank 100, and saves equipment materials and resources; and by providing a handle on the top wall 912 of the storage box 91, it is convenient to store, access and replace the storage box 91; at the same time, by arranging the air outlet 60 on the outer shell 70 and spacing it from the air inlet 20 of the top cover 81, it is avoided that when the top cover 81 is removed to replace the storage box 91, the air outlet 60 is polluted, thereby affecting the gas composition of the gas returned from the carbon dioxide absorption tank 100.

[0048] Wherein, both the first air hole 914 and the second air hole 915 can be multiple, and the multiple first air holes 914 are arranged at intervals, and the multiple second air holes 915 are arranged at intervals. The storage box 91 provided in the embodiment of the present application is provided with multiple first air holes 914 and second air holes 915, so that the gas exhaled by the patient can easily enter and exit the storage box 91, thereby ensuring smooth gas circulation, reducing gas circulation resistance, and allowing the gas to uniformly and fully contact and react with the carbon dioxide absorbent in the storage cavity 911, thereby improving the utilization rate of the carbon dioxide absorbent, and at the same time making it difficult for the carbon dioxide absorbent stored in the storage cavity 911 to leak out through the first air holes 914 or the second air holes 915, affecting the carbon dioxide absorption tank 100 The effect of absorbing carbon dioxide in the gas.

[0049] In a possible embodiment, the storage box 91 may be cylindrical. The main cavity 30 may be conical, that is, the diameter of the main cavity 30 gradually decreases from the top to the bottom of the tank body. It can be understood that the peripheral side wall 71 of the main cavity 30 forms a tapered structure. When the storage box 91 is installed in the main cavity 30 from the first opening 31, the diameter of the main cavity 30 close to the first opening 31 is larger, so that the storage box 91 can enter the main cavity 30. At the same time, the diameter of the main cavity 30 away from the first opening 31 is smaller, and the inner peripheral surface of the main cavity 30 away from the first opening 31 is in close contact with the outer peripheral surface of the storage box 91 to form a limit for the storage box 91, so as to prevent the storage box 91 from moving or rotating in the main cavity 30 and affecting the purification effect of the carbon dioxide absorption tank 100.

[0050] Please also read Figure 7 , Figure 7 for Figure 3 A schematic structural diagram of the sealing ring 92 is shown.

[0051] like Figure 4 and Figure 7As shown, in this embodiment, the carbon dioxide absorption tank 100 also includes a sealing ring 92, which is sealed between the first surface 721 of the first inner wall 72 and the bottom wall 913 of the storage box 91, and the sealing ring 92 surrounds the through hole 723 on the first surface 721 of the first inner wall 72, and surrounds the second air vent 915 on the bottom wall 913 of the storage box 91. In the carbon dioxide absorption tank 100 provided in the embodiment of the present application, the sealing ring 92 is sealed between the first inner wall 72 and the bottom wall 913 of the storage box 91 under the action of the dead weight of the storage box 91, thereby preventing the carbon dioxide-containing gas exhaled by the patient from flowing directly along the gap between the storage box 91 and the cavity wall of the main cavity 30 without being purified by the carbon dioxide absorbent in the storage cavity 911 of the storage box 91, entering the first chamber 40 through the through hole 723, and being fed back to the breathing circuit 200. This ensures that only the gas purified by the storage box 91 can enter the first chamber 40 through the through hole 723, thereby improving the purification rate of the carbon dioxide absorption tank 100 for the patient's exhaled gas.

[0052] In a possible implementation, the sealing ring 92 is provided with a positioning column 921, and the positioning column 921 is provided on the surface of the sealing ring 92. The first inner wall 72 is provided with a positioning hole 727, and the positioning hole 727 penetrates the first inner wall 72 along the thickness direction of the first inner wall 72. The positioning hole 727 is provided at the periphery of the through hole 723 and is spaced apart from the through hole 723. The sealing ring 92 is installed on the first inner wall 72, and the nail column of the sealing ring 92 penetrates the positioning hole 727 from the side of the first surface 721 of the first inner wall 72 to prevent the sealing ring 92 from moving or rotating in the main cavity 30, thereby affecting the sealing effect of the sealing ring 92. Among them, both the positioning column 921 and the positioning hole 727 can be multiple, and the multiple positioning columns 921 are spaced apart from each other, and the multiple positioning holes 727 are spaced apart from each other, and each positioning column 921 corresponds to a positioning hole 727.

[0053] The above are only some embodiments and implementation methods of the present application, and the protection scope of the present application is not limited thereto. Any changes or substitutions that can be easily thought of by any person skilled in the art within the technical scope disclosed in the present application should be included in the protection scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.

Claims

1. A carbon dioxide absorption tank, characterized in that: The tank body comprises an air inlet, an air outlet, a main cavity, a first cavity, and a second cavity, wherein the air inlet, the main cavity, the first cavity, the second cavity, and the air outlet are sequentially connected, and the air inlet and the air outlet are spaced apart; The main cavity, the first chamber and the second chamber are all arranged inside the tank body, and the main cavity is configured to accommodate a carbon dioxide absorbent; a through hole is provided on the bottom wall of the main cavity, and the through hole connects the main cavity and the first chamber, and part of the side wall of the main cavity and the peripheral side wall of the tank body together form the second chamber.

2. The carbon dioxide absorption tank according to claim 1, characterized in that: The main cavity has a first opening, which is arranged away from the first chamber. The tank body also includes a top cover, which is detachably mounted on the first opening and seals the first opening. The air inlet is arranged on the top cover.

3. The carbon dioxide absorption tank according to claim 1, characterized in that: The tank body further comprises a bottom cover, and the bottom wall of the main cavity, the bottom cover and a part of the peripheral side wall of the tank body together form the first chamber.

4. The carbon dioxide absorption tank according to claim 3, characterized in that: The bottom cover includes a water accumulation surface, the water accumulation surface faces the first chamber, the water accumulation surface is a conical surface, and protrudes in a direction away from the first chamber. The bottom cover is provided with a drainage hole, and the drainage hole is opened at the apex of the water accumulation surface and passes through the bottom cover.

5. The carbon dioxide absorption tank according to claim 3, characterized in that: The first chamber has a second opening, the second opening is arranged away from the main chamber, and the bottom cover is detachably mounted on the second opening and seals the second opening.

6. The carbon dioxide absorption tank according to any one of claims 1 to 5, characterized in that: The carbon dioxide absorption tank further comprises a storage box having a storage cavity, wherein the carbon dioxide absorbent is accommodated in the storage cavity; the storage box is installed in the main cavity, and the storage cavity is communicated with the main cavity.

7. The carbon dioxide absorption tank according to claim 6, characterized in that: A handle is arranged on the top wall of the material storage box.

8. The carbon dioxide absorption tank according to claim 6, characterized in that: The material storage box also has a plurality of first air holes and a plurality of second air holes, wherein the plurality of first air holes are arranged on the top wall of the material storage box and are spaced apart from each other, and the plurality of second air holes are arranged on the bottom wall of the material storage box and are spaced apart from each other, and the first air holes, the storage cavity and the second air holes are connected in sequence; Along the height direction of the tank body, the first air vent is disposed opposite to and communicated with the air inlet, and the second air vent is disposed opposite to and communicated with the through hole.

9. The carbon dioxide absorption tank according to claim 8, characterized in that: The carbon dioxide absorption tank also includes a sealing ring, which is sealed between the bottom wall of the main cavity and the bottom wall of the storage box. The sealing ring surrounds the through hole in its orthographic projection on the bottom wall of the main cavity, and surrounds a plurality of the second air holes in its orthographic projection on the bottom wall of the storage box.

10. The carbon dioxide absorption tank according to any one of claims 1 to 5, characterized in that: The peripheral side wall of the tank body is made of transparent material.

11. The carbon dioxide absorption tank according to any one of claims 1 to 5, characterized in that: The carbon dioxide absorption tank also includes a hand-held handle, which is connected to the outer surface of the tank body.

12. An anesthesia machine, characterized in that: It comprises a carbon dioxide absorption tank and a breathing circuit as described in any one of claims 1 to 11, wherein the breathing circuit is configured to deliver anesthetic gas to a patient and return gas exhaled by the patient, and the breathing circuit comprises a first pipe and a second pipe, wherein the first pipe is connected to the air inlet and the second pipe is connected to the air outlet.

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