Fixing kit and carbon dioxide removal system

Abstract

This utility model relates to a fixing kit and a carbon dioxide removal system. The fixing kit includes a base, a pedestal, and a vacuum device. The base has a mounting cavity and is used to support consumables. The pedestal is mounted on the base and encloses the mounting cavity. The vacuum device has an inlet and an outlet. The inlet is located inside the mounting cavity, and the outlet is located outside the mounting cavity, so as to create a negative pressure inside the mounting cavity. This fixing kit uses negative pressure to adsorb the pedestal, connecting the pedestal, consumables, and base. This ensures the secure installation of the consumables and the base, guaranteeing the stable operation of the carbon dioxide removal system. Furthermore, after the negative pressure is released, the pedestal and the base can be easily detached, facilitating the disassembly and replacement of consumables and avoiding the problems of loosening and detachment of the base and pedestal in related technologies.

Description

Technical Field

[0001] This utility model relates to the field of medical equipment technology, specifically to a fixation kit and a carbon dioxide removal system. Background Technology

[0002] In the field of medical devices, carbon dioxide removal systems are widely used in respiratory support, blood purification, and other areas to effectively remove carbon dioxide from patients' bodies. Related technologies typically include a consumable kit and a reusable base to reduce the overall cost of the system. However, the consumable kit is often mechanically or adhesively fixed to the base, which presents problems such as inconvenient installation and unstable fixation, affecting the system's stability and reliability. It also makes disassembly and replacement of consumables difficult. Utility Model Content

[0003] This utility model aims to at least partially solve one of the technical problems in the related art.

[0004] To address this, embodiments of this utility model propose a fixing kit that achieves a stable connection between the base and the subbase through a negative pressure adsorption base. This ensures the secure installation of consumables and the subbase, guarantees the stable operation of the carbon dioxide removal system, and facilitates the disassembly and replacement of consumables. It also solves the problem of loosening and falling off of the base and subbase in related technologies.

[0005] An embodiment of this utility model proposes a carbon dioxide removal system.

[0006] The fixing kit according to an embodiment of the present utility model includes a base, a base, and a vacuum device. The base has a mounting cavity and is used to support consumables. The base is disposed on the base and closes the mounting cavity. The vacuum device has an inlet and an outlet. The inlet is located inside the mounting cavity, and the outlet is located outside the mounting cavity, so as to create a negative pressure inside the mounting cavity.

[0007] The fixing kit of this utility model uses a negative pressure adsorption base to connect the base, consumables and the base, which can ensure the firmness of the installation of consumables and base, ensure the stable operation of the carbon dioxide removal system, and after the negative pressure is released, the base and base can be easily separated, which facilitates the disassembly and replacement of consumables and avoids the problem of loosening and falling off of the base and base fixing in related technologies.

[0008] In some embodiments, the vacuum device includes a vacuum pump, a first pressure sensor, and a vacuum shut-off valve. The vacuum pump has the suction port and the discharge port. The first pressure sensor is disposed in the mounting cavity, and the vacuum shut-off valve is disposed in the suction port of the vacuum pump.

[0009] In some embodiments, the base is mounted within the mounting cavity.

[0010] In some embodiments, the base is provided with a first guide groove on the open side of the mounting cavity, the wall of the first guide groove gradually tilting away from the mounting cavity along the direction of the opening of the mounting cavity; and / or, a second guide groove is provided on one side of the base, the wall of the second guide groove gradually tilting away from the mounting cavity along the depth direction of the mounting cavity, and the side of the base facing the mounting cavity.

[0011] In some embodiments, the base is provided with a mounting hole that penetrates the base in the thickness direction; the fixing kit further includes a second pressure sensor, the second pressure sensor including a top cover, a first diaphragm and a pressure measuring body, the top cover being disposed on the mounting hole, the open end of the top cover facing the mounting cavity, the open end of the top cover being provided with the first diaphragm, the top cover having an inlet and an outlet, the inlet and the outlet of the top cover being respectively used to connect pipes so that fluid flows through the top cover, the pressure measuring body being disposed in the mounting cavity, the pressure measuring body having a pressure measuring end, the pressure measuring end being engaged with the open end of the top cover, the pressure measuring end having a contact point that abuts against the first diaphragm.

[0012] In some embodiments, the second pressure sensor and the mounting hole are each three in number, with the three second pressure sensors located at the inlet, outlet, and return end of the fluid pumping unit, respectively.

[0013] In some embodiments, the base has a front end cavity and a rear end cavity, and the fixing kit further includes a second diaphragm. The base has a second diaphragm on both the front end cavity and the rear end cavity. The second diaphragm faces the mounting cavity and is used to cooperate with a piston pump. In the direction of fluid flow, the front end cavity is located downstream of the outlet of the fluid pumping unit and communicates with the outlet of the upper cover of the second pressure sensor. The front end cavity is used to communicate with the inlet of the fluid processing equipment. The rear end cavity is used to communicate with the outlet of the fluid processing equipment. The rear end cavity is located upstream of the second pressure sensor at the return end and communicates with the inlet of the upper cover of the second pressure sensor.

[0014] In some embodiments, the base is provided with a first built-in pipeline, which is located on one side of the base. The outlet of the second pressure sensor at the outlet of the fluid pumping unit and the front end cavity are connected through the first built-in pipeline, and the rear end cavity and the inlet of the second pressure sensor at the return end are connected through the first built-in pipeline.

[0015] In some embodiments, the base is provided with an inlet pipe, an outlet pipe, and a second built-in pipe. The inlet of the inlet pipe and the outlet of the outlet pipe are both located on the other side of the base. The second built-in pipe is located on one side of the base. The outlet of the inlet pipe and the inlet of the upper cover of the second pressure sensor of the fluid pumping unit are connected through the second built-in pipe. The outlet of the upper cover of the second pressure sensor at the return end and the inlet of the outlet pipe are connected through the second built-in pipe.

[0016] The carbon dioxide removal system of this utility model embodiment includes the aforementioned fixing kit.

[0017] The carbon dioxide removal system of this utility model embodiment is easy to disassemble and install, has good installation stability, and can operate stably. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the fixing kit according to an embodiment of the present utility model;

[0019] Figure 2 This is a schematic diagram of the carbon dioxide removal system according to an embodiment of the present invention;

[0020] Figure 3 This is a front view of the lower side of the base of the fixing kit according to an embodiment of the present invention.

[0021] Figure label:

[0022] 1000. Carbon dioxide removal system;

[0023] 100. Fixed kit;

[0024] 1. Base; 11. Mounting cavity; 12. First guide groove; 13. Mounting plate;

[0025] 2. Base; 21. Front cavity; 22. Rear cavity; 23. First internal pipeline; 24. Liquid outlet pipe; 25. Second internal pipeline; 26. Sealing ring; 27. Liquid inlet pipe.

[0026] 3. Vacuum equipment; 31. Vacuum pump; 32. First pressure sensor;

[0027] 5. Second pressure sensor; 51. Top cover; 52. First diaphragm; 53. Pressure measuring body;

[0028] 61. Inlet of the fluid pumping unit; 62. Outlet of the fluid pumping unit; 63. Return end;

[0029] 7. Second diaphragm;

[0030] 200, Oxygenator; 300, Lower pump pipe; 400, Peristaltic pump; 4001, Fitting cover; 500, Piston pump. Detailed Implementation

[0031] The embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, and should not be construed as limiting the present invention.

[0032] The following is a reference to the appendix. Figures 1 to 3 The fixing kit 100 and the carbon dioxide removal system 1000 of this utility model are described in detail.

[0033] like Figure 2 As shown, the carbon dioxide removal system of this utility model embodiment includes a fixing kit 100.

[0034] like Figures 1 to 3 As shown, the fixing kit 100 of this utility model embodiment includes a base 1, a base 2 and a vacuum device 3. The base 1 has a mounting cavity 11. The base 2 is used to support consumables. The base 2 is disposed on the base 1 and the base 2 closes the mounting cavity 11. The vacuum device 3 has an inlet and an outlet. The inlet is located inside the mounting cavity 11 and the outlet is located outside the mounting cavity 11 so as to form a negative pressure inside the mounting cavity 11.

[0035] The consumable component of the carbon dioxide removal system is mounted on base 2. When installing base 2 and base 1, base 2 is installed onto base 1, sealing the open side of mounting cavity 11. Then, vacuum device 3 is activated, extracting some air from mounting cavity 11, reducing the pressure within the vacuum chamber and creating a negative pressure. This negative pressure firmly adheres base 2 to base 1, thus achieving a fixed connection between base 2 and base 1, and consequently, a fixed connection between the consumable component and base 1. When replacement of the consumable is required, the negative pressure in mounting cavity 11 is released, and base 2 can then be removed from base 1.

[0036] Therefore, the fixing kit 100 of this utility model uses the vacuum device 3 to form a negative pressure adsorption base 2 to connect the base 2, consumables and base 1, which can ensure the firmness of the installation of consumables and base 1, ensure the stable operation of the carbon dioxide removal system, and after the negative pressure is released, the base 2 and base 1 can be easily separated, which facilitates the disassembly and replacement of consumables and avoids the problem of loosening and falling off of the base 1 and base 2 in related technologies.

[0037] Specifically, in this embodiment, the vacuum degree of the mounting cavity 11 reaches -350 mmhg under negative pressure.

[0038] Specifically, the vacuum device 3 includes a vacuum pump 31, a first pressure sensor 32, and a vacuum shut-off valve. The vacuum pump 31 has an inlet and an outlet, and generates a vacuum effect within the mounting cavity 11. The first pressure sensor 32 is located within the mounting cavity 11, detecting the pressure within the cavity and monitoring the negative pressure value in real time to provide pressure feedback to the vacuum pump 31. The vacuum shut-off valve is located at the inlet of the vacuum pump 31, controlling the opening and closing of the inlet.

[0039] When the first pressure sensor 32 detects that the pressure inside the mounting cavity 11 is less than 350 mmHg, the vacuum pump 31 shuts off, stops pumping air, and the vacuum shut-off valve closes, sealing the suction port to maintain the mounting cavity 11 under the set negative pressure. If leakage occurs in the mounting cavity 11, and the first pressure sensor 32 detects that the pressure inside the mounting cavity 11 rises back to above 350 mmHg, the vacuum shut-off valve opens, the vacuum pump 31 starts, and the vacuum pump 31 extracts the air from the mounting cavity 11 to maintain the negative pressure state inside the mounting cavity 11.

[0040] It should be noted that when it is necessary to release the negative pressure state, the vacuum pump 31 is de-energized (turned off), the vacuum pump 31 is turned off to pump air into the mounting cavity 11, and the vacuum shut-off valve is opened to connect the mounting cavity 11 with the outside world to achieve pressure balance, thus releasing the negative pressure state of the mounting cavity 11. Then the base 2 can be removed from the base 1.

[0041] like Figures 1 to 3 As shown, in some embodiments, the base 2 is an integral plate structure.

[0042] In some embodiments, the base 2 is installed inside the mounting cavity 11. The edge of the base 2 contacts the mounting cavity 11, and the base 2 and the mounting cavity 11 have a large contact area, making the installation of the base 2 and the base 1 easier to observe and facilitating personnel to judge that the base 2 and the base 1 are installed in place.

[0043] Furthermore, a sealing groove is provided on the edge of the base 2, and a sealing ring 26 is provided in the sealing groove, which abuts against the wall of the mounting cavity 11. The sealing ring can increase the sealing performance of the connection between the base 2 and the base 1, and improve the stability of the connection between the base 2, consumables and base 1.

[0044] In some embodiments, the base 1 has a first guide groove 12 on the open side of the mounting cavity 11, and the wall surface of the first guide groove 12 is along the direction of the open side of the mounting cavity 11 (e.g., Figure 1 The first guide groove 12 gradually slopes away from the mounting cavity 11 (from bottom to top). This guide groove guides the base 2 during installation into the mounting cavity 11, improving the ease of installation between the base 2 and the base 1. Figure 1As shown, the base 1 has a first chamfer on the open side of the mounting cavity 11, and the first chamfer forms a first guide groove 12.

[0045] In other embodiments, a second guide groove is provided on one side of the base 2, and the wall of the second guide groove is along the depth direction of the mounting cavity 11 (e.g., Figure 1 The base 2 gradually slopes away from the mounting cavity 11 from top to bottom, with one side of the base 2 facing the mounting cavity 11, meaning this side of the base 2 is its lower side. The second guide groove guides the base 2 during installation into the mounting cavity 11, improving the ease of installation between the base 2 and the base 1. Specifically, the base 2 has a second chamfer on this side, forming the second guide groove.

[0046] The base 2 has a mounting hole that penetrates the base 2 in the thickness direction. The fixing kit 100 further includes a second pressure sensor 5, which includes a top cover 51, a first diaphragm 52, and a pressure measuring body 53. The top cover 51 is disposed on the mounting hole, with its open end facing the mounting cavity 11. The open end of the top cover 51 is provided with the first diaphragm 52. The top cover 51 has an inlet and an outlet, which are respectively used to connect pipes so that fluid can flow through the top cover 51. The pressure measuring body 53 is disposed in the mounting cavity 11 and has a pressure measuring end that engages with the open end of the top cover 51. The pressure measuring end has a contact that abuts against the first diaphragm 52.

[0047] After the base 2 is installed on the base 1, the pressure measuring end engages with the open end of the top cover 51, and the contact point abuts against the first diaphragm 52. Fluid flows into the top cover 51 from the inlet and flows out from the outlet of the top cover 51. Because the contact point of the second pressure sensor 5 abuts against the first diaphragm 52, the second pressure sensor 5 can detect the pressure of the fluid as it flows through the space defined by the top cover 51 and the first diaphragm 52, thereby obtaining the fluid pressure data at the detection point. When replacing the base 2 and consumable parts, the top cover 51 and the first diaphragm 52 are replaced simultaneously; in other words, the top cover 51 and the first diaphragm 52 are also part of the consumables.

[0048] For fluid pressure detection, the pressure measuring body 53 of the second pressure sensor 5 is located inside the mounting cavity 11 and is a reusable part. It is isolated from the fluid being detected by the first diaphragm 52, preventing contact between the pressure measuring body and the fluid, ensuring the cleanliness of the reusable part, avoiding fluid contamination of the reusable part (pressure measuring body), and preventing cross-infection between different patients due to pressure testing. Furthermore, the pressure measuring body 53 and the top cover 51 are respectively a reusable part and a consumable part; the reusability of the pressure measuring body 53 greatly saves on consumable costs.

[0049] Specifically, there are three second pressure sensors 5 and three mounting holes. The three second pressure sensors 5 are located at the inlet 61, outlet 62, and return end 63 of the fluid pumping unit, respectively. The fixing kit 100 of this embodiment detects the fluid pressure through the three second pressure sensors 5, obtaining the fluid pressure at the inlet 61, outlet 62, and return end 63 of the fluid pumping unit. This enables real-time early warning of equipment failure or pipeline abnormalities in the carbon dioxide removal system of this embodiment, providing data support for optimizing treatment parameters (such as the pumping speed of the fluid pumping unit).

[0050] The fluid pumping unit is a power unit that draws fluid out of the patient's body and pumps it forward. The fluid pumping unit is located inside the mounting cavity 11. The inlet 61 and outlet 62 of the fluid pumping unit are connected by the lower pump pipe 300.

[0051] For example, the fluid pumping unit is a peristaltic pump 400. The peristaltic pump 400 includes a peristaltic pump body and a mating cover 4001. The peristaltic pump body is located in the mounting cavity 11, the mating cover 4001 is located on the base 2, and the lower pump pipe 300 is installed between the peristaltic pump body and the mating cover 4001.

[0052] The base 2 is provided with a front cavity 21 and a rear cavity 22. The fixing kit 100 further includes a second diaphragm 7. The base 2 is provided with a second diaphragm 7 on both the front cavity 21 and the rear cavity 22. The second diaphragm 7 faces the mounting cavity 11. The second diaphragm 7 is used to cooperate with the piston pump 500. In the direction of fluid flow, the front cavity 21 is located downstream of the second pressure sensor 5 at the outlet of the fluid pumping unit and is connected to the outlet of the second pressure sensor 5. The front cavity 21 is used to connect to the inlet of the fluid processing equipment. The rear cavity 22 is used to connect to the outlet of the fluid processing equipment. The rear cavity 22 is located upstream of the second pressure sensor 5 at the return end and is connected to the inlet of the second pressure sensor 5.

[0053] Fluid processing equipment is used to process fluids, such as oxygenator 200, which removes carbon dioxide from blood.

[0054] The following description uses an oxygenator 200 as the fluid processing device and blood as the fluid. Blood flows from the outlet 62 of the fluid pumping unit into the front cavity 21, then through the oxygenator 200 into the rear cavity 22. From the rear cavity 22, the blood flows to the second pressure sensor 5 at the return end 63. The fixing kit 100 of this embodiment integrates the front cavity 21 and the rear cavity 22 on the base 2, which facilitates the cooperation of both the front cavity 21 and the rear cavity 22 with the piston pump 500. Blood in the front cavity 21 flows through the oxygenator 200 to the rear cavity 22 under the drive of the piston pump 500 located below the front cavity 21. Blood in the rear cavity flows through the oxygenator 200 to the front cavity 21 under the drive of the piston pump 500 located below the rear cavity 22. This allows for frequent reciprocating flow of blood within the oxygenator 200, achieving efficient blood processing by the oxygenator 200. The second diaphragm 7 isolates the blood from the piston pump 500, preventing the piston pump 500 from coming into contact with the blood and ensuring the cleanliness of the reusable part.

[0055] Specifically, the base 1 is equipped with a mounting plate 13, on which the pressure measuring body 53 of the second pressure sensor 5 and the piston pump 500 are mounted. This serves two purposes: firstly, to fix the pressure measuring body 53 and the piston pump 500; and secondly, to ensure that the upper ends of pressure measuring bodies 53 and piston pumps of different sizes can correspond to the corresponding structures on the base 2. It should be noted that the mounting plate 13 does not divide the mounting cavity into two non-communicating chambers, thus the mounting plate 13 does not interfere with the vacuum device 3 and will not affect the formation or release of negative pressure in the mounting cavity or the adsorption effect on the base 2. Alternatively, in some embodiments, the mounting plate 13 divides the mounting cavity 11 into two non-communicating chambers, with the upper chamber facing the base 2. The suction port of the vacuum device 3 and the pressure switch 4 are located in the upper chamber, thus not affecting the negative pressure effect of the upper chamber or the adsorption effect on the base 2.

[0056] The base 2 is provided with a first built-in pipe 23, which is located on this side (lower side) of the base 2. The first built-in pipe 23 has two parts. The outlet of the upper cover 51 of the second pressure sensor 5 at the outlet of the fluid pumping unit and the front cavity 21 are connected through the first built-in pipe 23. The rear cavity 22 and the inlet of the upper cover 51 of the second pressure sensor 5 at the return end are connected through the first built-in pipe 23. The fixing kit 100 of this utility model integrates the first built-in pipe 23 on the lower side of the base 2, which facilitates the connection of various nodes (i.e., the connection between the outlet of the fluid pumping unit and the front cavity 21, and the connection between the rear cavity 22 and the return end), simplifies the structure of the base 2, reduces the structural complexity of the base 2 and consumables, and also facilitates the assembly of consumables and the base 2.

[0057] The base 2 is provided with an inlet pipe 27, an outlet pipe 24, and a second built-in pipe 25. The inlet of the inlet pipe 27 and the outlet of the outlet pipe 24 are both located on the other side (upper side) of the base 2. The second built-in pipe 25 is located on this side of the base 2. There are two second built-in pipes 25. The outlet of the inlet pipe 27 and the inlet of the upper cover 51 of the second pressure sensor 5 (the inlet of the fluid pumping unit) are connected through the second built-in pipe 25. The outlet of the upper cover 51 of the second pressure sensor 5 (the return end) and the inlet of the outlet pipe 24 are connected through the second built-in pipe 25. The fixing kit 100 of this embodiment integrates the second built-in pipe 25 on the lower side of the base 2, which facilitates the connection of various nodes (i.e., the connection between the outlet of the inlet pipe 27 and the inlet of the fluid pumping unit, and the connection between the return end and the inlet of the outlet pipe 24), simplifies the structure of the base 2, reduces the structural complexity of the base 2 and consumables, and also facilitates the assembly of consumables and the base 2.

[0058] See attached document Figure 2 Blood enters through the inlet of the inlet tube 27, flows sequentially through the second built-in tube 25, the second pressure sensor 5 located at the inlet 61 of the fluid pumping unit, the lower pump tube 300, the second pressure sensor 5 located at the outlet 62 of the fluid pumping unit, the first built-in tube 23, the front cavity 21, the oxygenator 200, the rear cavity 22, the first built-in tube 23, the second pressure sensor 5 located at the return end 63, the second built-in tube 25, and the outlet tube 24, and then returns to the patient's body through the outlet tube 24.

[0059] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0060] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this utility model, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0061] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a connection that allows communication between them; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0062] In this utility model, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0063] In this utility model, the terms "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to a specific feature, structure, material, or characteristic described in connection with that embodiment or example, which is included in at least one embodiment or example of this utility model. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0064] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention.

Claims

1. A fixing kit (100), characterized in that, include: A base (1) having a mounting cavity (11); Base (2), the base (2) is used to support consumables, the base (2) is disposed on the base (1), and the base (2) closes the mounting cavity (11); and A vacuum device (3) is provided with an inlet and an outlet. The inlet is located inside the mounting cavity (11), and the outlet is located outside the mounting cavity (11) so as to create a negative pressure inside the mounting cavity (11).

2. The fixing kit (100) according to claim 1, characterized in that, The vacuum device (3) includes a vacuum pump, a first pressure sensor and a vacuum shut-off valve. The vacuum pump has the suction port and the discharge port. The first pressure sensor is located in the mounting cavity (11) and the vacuum shut-off valve is located in the suction port of the vacuum pump.

3. The fixing kit (100) according to claim 1, characterized in that, The base (2) is installed inside the mounting cavity (11).

4. The fixing kit (100) according to claim 3, characterized in that, The base (1) has a first guide groove (12) on the open side of the mounting cavity (11), and the wall of the first guide groove (12) gradually slopes away from the mounting cavity (11) along the direction of the open side of the mounting cavity (11); and / or, the base (2) has a second guide groove on one side, and the wall of the second guide groove gradually slopes away from the mounting cavity (11) along the depth direction of the mounting cavity (11), and the side of the base (2) faces the mounting cavity (11).

5. The fixing kit (100) according to claim 1, characterized in that, The base (2) is provided with a mounting hole, which penetrates the base (2) in the thickness direction; the fixing kit (100) further includes a second pressure sensor (5), which includes a top cover (51), a first diaphragm (52) and a pressure measuring body (53). The top cover (51) is disposed on the mounting hole, and the open end of the top cover (51) faces the mounting cavity (11). The first diaphragm (52) is provided, and the upper cover (51) is provided with an inlet and an outlet. The inlet and outlet of the upper cover (51) are respectively used to connect pipes so that fluid can flow through the upper cover (51). The pressure measuring body (53) is provided in the mounting cavity (11). The pressure measuring body (53) has a pressure measuring end. The pressure measuring end is fastened to the open end of the upper cover (51). The pressure measuring end has a contact point. The contact point abuts against the first diaphragm (52).

6. The fixing kit (100) according to claim 5, characterized in that, The second pressure sensor (5) and the mounting hole are both three in number, and the three second pressure sensors (5) are located at the inlet, outlet and return end of the fluid pumping unit, respectively.

7. The fixing kit (100) according to claim 6, characterized in that, The base (2) is provided with a front end cavity (21) and a rear end cavity (22). The fixing kit (100) further includes a second diaphragm (7). The base (2) is provided with a second diaphragm (7) on both the front end cavity (21) and the rear end cavity (22). The second diaphragm (7) faces the mounting cavity (11). The second diaphragm (7) is used to cooperate with the piston pump (500). In the direction of fluid flow, the front end cavity (21) is located downstream of the second pressure sensor (5) at the outlet of the fluid pumping unit and communicates with the outlet of the upper cover (51) of the second pressure sensor (5). The front end cavity (21) is used to communicate with the inlet of the fluid processing equipment. The rear end cavity (22) is used to communicate with the outlet of the fluid processing equipment. The rear end cavity (22) is located upstream of the second pressure sensor (5) at the return end and communicates with the inlet of the upper cover (51) of the second pressure sensor (5).

8. The fixing kit (100) according to claim 7, characterized in that, The base (2) is provided with a first built-in pipe (23), which is located on one side of the base (2). The outlet of the second pressure sensor (5) at the outlet of the fluid pumping unit and the front end cavity (21) are connected through the first built-in pipe (23). The rear end cavity (22) and the inlet of the second pressure sensor (5) at the return end are connected through the first built-in pipe (23).

9. The fixing kit (100) according to claim 6, characterized in that, The base (2) is provided with an inlet pipe (27), an outlet pipe (24), and a second built-in pipe (25). The inlet of the inlet pipe (27) and the outlet of the outlet pipe (24) are both located on the other side of the base (2). The second built-in pipe (25) is located on the side of the base (2). The outlet of the inlet pipe (27) and the inlet of the upper cover (51) of the second pressure sensor (5) of the fluid pumping unit are connected through the second built-in pipe (25). The outlet of the upper cover (51) of the second pressure sensor (5) at the return end and the inlet of the outlet pipe (24) are connected through the second built-in pipe (25).

10. A carbon dioxide removal system, characterized in that, Includes the fixing kit (100) as described in any one of claims 1 to 9.

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