Gas exchange device

Abstract

The utility model relates to the technical field of medical instruments, and particularly discloses a gas exchange device. The first heat exchange module and the second heat exchange module arranged on the gas exchange device can exchange heat with blood in the gas exchange module, so that multiple times of heat exchange of the blood are achieved, the heat exchange area is increased, the heat exchange efficiency of the gas exchange device is improved, and the heat preservation effect is good; the first heat exchange module and the second heat exchange module are communicated through the communication channel, the two heat exchange modules can share one heat exchange medium supply device and can share one heat exchange medium inlet and one heat exchange medium outlet, the structure of the gas exchange device is simplified, the size of the gas exchange device can be reduced, and the heat exchange efficiency is improved by optimizing the heat exchange medium flowing mode. According to the gas exchange device, the circulation path of the heat exchange medium is shortened, the circulation speed of the heat exchange medium in the gas exchange device is increased, the heat exchange efficiency of the gas exchange device is improved, the internal structure of the gas exchange device is simplified, and the compactness of the internal structure is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of medical equipment, in particular to a gas exchange device. Background Art

[0002] The main function of the lungs is to oxygenate the blood and remove carbon dioxide from the blood. Gas exchange devices used to partially or completely replace the main functions of the lungs include ECMO (Extracorporeal Membrane Oxygenation) and ECCO2R (Extracorporeal CO2 Removal).

[0003] Take ECMO as an example. It is a medical device that performs gas exchange outside the patient's body to achieve blood oxygenation, thereby partially or completely replacing the patient's cardiopulmonary function. It is often used in complex operations such as cardiac arrest, cardiopulmonary failure or organ transplantation.

[0004] As a gas exchange device, the oxygenator is one of the core components of ECMO. It is used to realize lung function and complete the exchange of carbon dioxide and oxygen in the blood. Taking the common membrane oxygenator as an example, after the blood is drawn out of the patient's body, it enters the oxygenator through the blood inlet, and fresh oxygen enters the hollow oxygenation membrane filament from the gas inlet. Gas and blood achieve the exchange of fresh oxygen and carbon dioxide in the blood through diffusion on both sides of the oxygenation membrane filament.

[0005] At present, the heat exchange area of ​​the oxygenator with heat exchange function is small, the heat exchange efficiency is relatively low, and the flow path of the heat exchange medium inside the oxygenator is relatively long, which not only has a poor heat exchange effect, but also causes the internal structure of the oxygenator to be not compact. Utility Model Content

[0006] The purpose of the utility model is to provide a gas exchange device, which improves the heat exchange efficiency of the gas exchange device, improves the heat exchange effect, simplifies the structure of the gas exchange device, and enhances the compactness of the internal structure of the gas exchange device.

[0007] To achieve this purpose, the utility model adopts the following technical solutions:

[0008] The utility model provides a gas exchange device, comprising:

[0009] A shell, wherein the shell is provided with a blood inlet, a blood outlet, a heat exchange medium inlet and a heat exchange medium outlet;

[0010] A gas exchange module is disposed inside the housing, and the blood flowing in from the blood inlet can flow through the gas exchange module to exchange gas with the gas exchange module, and then flow out from the blood outlet;

[0011] a first heat exchange module, arranged radially outside the gas exchange module, for exchanging heat with blood flowing through the gas exchange module, wherein a first heat exchange medium chamber is formed inside the first heat exchange module;

[0012] a second heat exchange module, disposed radially inwardly of the gas exchange module, for exchanging heat with blood flowing through the gas exchange module, wherein a second heat exchange medium chamber is formed inside the second heat exchange module; and

[0013] A communication channel is arranged inside the shell;

[0014] The heat exchange medium can flow in from the heat exchange medium inlet, flow through the first heat exchange medium chamber, the connecting passage, the second heat exchange medium chamber in sequence, and then flow out from the heat exchange medium outlet; or

[0015] The heat exchange medium can flow in from the heat exchange medium inlet, flow through the second heat exchange medium chamber, the connecting passage, the first heat exchange medium chamber in sequence, and then flow out from the heat exchange medium outlet.

[0016] As an optional technical solution of the above-mentioned gas exchange device, the heat exchange medium only flows through the connecting channel once during the process of flowing from the heat exchange medium inlet to flowing out from the heat exchange medium outlet.

[0017] As an optional technical solution of the above-mentioned gas exchange device, there is one and only one connecting channel.

[0018] As an optional technical solution of the above-mentioned gas exchange device, the fluid between the first heat exchange medium chamber and / or the second heat exchange medium chamber and the blood is not connected, and the heat exchange medium can exchange heat with the blood flowing through the gas exchange module through at least part of the side wall of the first heat exchange module and / or the second heat exchange module.

[0019] As an optional technical solution of the above-mentioned gas exchange device, the communication channel is configured not to pass through the gas exchange module.

[0020] As an optional technical solution of the above-mentioned gas exchange device, the connecting channel includes a first section extending substantially parallel to the axis of the gas exchange device, and a second section extending substantially perpendicular to the axis of the gas exchange device.

[0021] As an optional technical solution of the above-mentioned gas exchange device, one end of the first section is connected to one end of the second section, the other end of the first section is connected to the first heat exchange medium chamber, and the other end of the second section is connected to the second heat exchange medium chamber.

[0022] As an optional technical solution of the above-mentioned gas exchange device, a part of the side wall of the shell protrudes outward to form a bump, and the inner side of the bump forms the first section of the connecting channel.

[0023] As an optional technical solution of the above-mentioned gas exchange device, the shell includes a base, and the second section of the connecting channel is formed on the base.

[0024] As an optional technical solution of the above-mentioned gas exchange device, in the axial direction of the gas exchange device, the position of the heat exchange medium inlet is substantially aligned with the position of the heat exchange medium outlet; and / or

[0025] In the axial direction of the gas exchange device, the position of the blood inlet is substantially aligned with the position of the blood outlet.

[0026] The gas exchange device provided by the utility model has a first heat exchange module and a second heat exchange module which can respectively exchange heat with the blood in the gas exchange module, thereby realizing multiple heat exchanges on the blood, increasing the heat exchange area, improving the heat exchange efficiency of the gas exchange device, improving the heat exchange effect, and having a good thermal insulation effect; the first heat exchange module and the second heat exchange module are connected through a connecting channel, and the two heat exchange modules can share a heat exchange medium supply device and a group of heat exchange medium inlet and heat exchange medium outlet, thereby simplifying the structure of the gas exchange device and reducing the volume of the gas exchange device; the heat exchange medium flows from the heat exchange medium inlet to the first heat exchange module The heat exchange medium flows through the second heat exchange medium chamber, the connecting channel, and the first heat exchange medium chamber and then is discharged through the heat exchange medium outlet, or the heat exchange medium flows from the heat exchange medium inlet to the first heat exchange medium chamber, the connecting channel, and the second heat exchange medium chamber and then is discharged through the heat exchange medium outlet. While realizing secondary heat exchange of the blood in the gas exchange module, the circulation path of the heat exchange medium is shortened; the heat exchange medium only flows through the connecting channel once, which increases the circulation speed of the heat exchange medium in the gas exchange device and improves the heat exchange efficiency of the gas exchange device; there is one and only one connecting channel, which further simplifies the internal structure of the gas exchange device and improves the compactness of the internal structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a structural schematic diagram of a gas exchange device provided by an embodiment of the utility model;

[0028] Figure 2 is a cross-sectional view of a gas exchange device provided by an embodiment of the utility model;

[0029] Figure 3 It is a schematic diagram of the flow direction of the heat exchange medium provided in the embodiment of the utility model;

[0030] Figure 4 It is a schematic diagram of the structure of the bottom heat exchange channel and the second partition plate provided in an embodiment of the utility model;

[0031] Figure 5 It is a schematic diagram of the structure of the bottom heat exchange flow channel provided by an embodiment of the utility model;

[0032] Figure 6 It is a structural schematic diagram of a first partition plate and a heat exchange tube provided in an embodiment of the utility model;

[0033] Figure 7 It is a structural schematic diagram of a first partition plate and a first shell provided by an embodiment of the utility model;

[0034] Figure 8 It is a schematic diagram of the flow direction of blood in a gas exchange device provided by an embodiment of the utility model.

[0035] In the figure:

[0036] 1. Shell; 2. Blood flow channel; 3. Gas exchange module; 4. First heat exchange module; 6. Second heat exchange module; 7. Bottom heat exchange flow channel; 8. Blood inflow channel; 9. Top end cover;

[0037] 11. blood inlet; 12. blood outlet; 13. heat exchange medium inlet; 14. heat exchange medium outlet; 15. base; 16. first shell; 17. second shell; 19. communication channel; 191. first section; 192. second section; 110. bump;

[0038] 21. Guide cone;

[0039] 41. first heat exchange medium chamber; 411. first heat exchange chamber; 412. second heat exchange chamber; 42. first partition plate; 43. heat exchange cylinder;

[0040] 61, second heat exchange medium chamber; 611, third heat exchange chamber; 612, fourth heat exchange chamber; 62, second partition plate;

[0041] 71. A first bottom heat exchange channel; 72. A second bottom heat exchange channel. DETAILED DESCRIPTION

[0042] The present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It is to be understood that the specific embodiments described herein are only used to explain the present invention, rather than to limit the present invention. It should also be noted that, for ease of description, only the parts related to the present invention, rather than all structures, are shown in the accompanying drawings.

[0043] In the description of the present invention, unless otherwise clearly specified and limited, the terms "connected", "connected", and "fixed" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0044] In the present utility model, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0045] In the description of this embodiment, the terms "upper", "lower", "right", etc., are based on the directions or positions shown in the drawings, and are only for the convenience of description and simplified operation, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation of the present invention. In addition, the terms "first" and "second" are only used to distinguish in the description and have no special meaning.

[0046] like Figures 1 to 3 As shown, this embodiment provides a gas exchange device, which can be an oxygenation device for blood oxygenation, a carbon dioxide removal device for removing carbon dioxide from the blood, or a gas exchange device for other therapeutic purposes of the blood, and the present application does not impose any restrictions on this.

[0047] The gas exchange device includes a shell, a gas exchange module 3 , a first heat exchange module 4 , a second heat exchange module 6 and a communication channel 19 .

[0048] The shell is provided with a blood inlet 11, a blood outlet 12, a heat exchange medium inlet 13 and a heat exchange medium outlet 14.

[0049] The gas exchange module 3 is disposed inside the shell, and the blood flowing in from the blood inlet 11 can flow through the gas exchange module 3 to exchange gases with the gas exchange module 3 , and then flow out from the blood outlet 12 .

[0050] In some embodiments, the gas exchange module 3 includes a plurality of hollow fiber membranes, gas flows inside the hollow fiber membranes, blood flows between the hollow fiber membranes, and gas and blood achieve gas exchange through diffusion on both sides of the membranes.

[0051] In some embodiments, the gas is oxygen or a mixed gas containing oxygen; in other embodiments, the gas is carbon dioxide or a mixed gas containing carbon dioxide.

[0052] The first heat exchange module 4 is arranged radially outside the gas exchange module 3 . The first heat exchange module 4 is used to exchange heat with the blood flowing through the gas exchange module 3 . A first heat exchange medium chamber 41 is formed inside the first heat exchange module 4 .

[0053] The second heat exchange module 6 is arranged on the radial inner side of the gas exchange module 3 for exchanging heat with the blood flowing through the gas exchange module 3 , and a second heat exchange medium chamber 61 is formed inside the second heat exchange module 6 .

[0054] The first heat exchange module 4 and the second heat exchange module 6 are respectively used to exchange heat with the blood in the gas exchange module 3, thereby realizing multiple heat exchanges of the blood, increasing the heat exchange area, improving the heat exchange efficiency of the gas exchange device, improving the heat exchange effect, and achieving good thermal insulation effect.

[0055] like Figure 3 As shown, the connecting channel 19 is arranged inside the shell, and the heat exchange medium can flow in from the heat exchange medium inlet 13, and flow through the second heat exchange medium chamber 61, the connecting channel 19, the first heat exchange medium chamber 41 in sequence, and then flow out from the heat exchange medium outlet 14; or, in other feasible embodiments, the heat exchange medium inlet and the heat exchange medium outlet are swapped so that the heat exchange medium can flow in from the heat exchange medium inlet, and flow through the first heat exchange medium chamber 41, the connecting channel 19, the second heat exchange medium chamber 61 in sequence, and then flow out from the heat exchange medium outlet.

[0056] The first heat exchange module 4 and the second heat exchange module 6 are connected via a connecting channel 19. The two heat exchange modules can share a heat exchange medium supply device, and can share a heat exchange medium inlet 13 and a heat exchange medium outlet 14, which simplifies the structure of the gas exchange device and thereby reduces the volume of the gas exchange device.

[0057] In some embodiments, the heat exchange medium inlet 13 is connected to one of the first heat exchange module 4 and the second heat exchange module 6, and the heat exchange medium outlet 14 is connected to the other of the first heat exchange module 4 and the second heat exchange module 6. Compared with the solution in which the heat exchange medium inlet and the heat exchange medium outlet are both connected to the first heat exchange module 4 or the second heat exchange module 6 at the same time, the two flow modes of the heat exchange medium of the utility model shorten the circulation path of the heat exchange medium. The heat exchange medium only needs to flow through the connecting channel 19 once, which increases the circulation speed of the heat exchange medium in the gas exchange device, thereby improving the heat exchange efficiency of the gas exchange device.

[0058] In some embodiments, there is one and only one connecting channel 19, which simplifies the internal structure of the gas exchange device and improves the compactness of the internal structure.

[0059] In some embodiments, the first heat exchange medium chamber 41 is not fluidically connected to the blood, and the heat exchange medium can exchange heat with the blood flowing through the gas exchange module 3 through at least part of the side wall of the first heat exchange module 4. This structure does not require additional pre-filling volume and is more suitable for infant patients.

[0060] In some embodiments, the second heat exchange medium chamber 61 is not fluidically connected to the blood, and the heat exchange medium can exchange heat with the blood flowing through the gas exchange module 3 through at least part of the side wall of the second heat exchange module 6. This structure does not require additional priming volume and is more suitable for infant patients.

[0061] In some embodiments, the first heat exchange medium chamber 41 and the second heat exchange medium chamber 61 are not in fluid communication with the blood, and the heat exchange medium can exchange heat with the blood flowing through the gas exchange module 3 through at least part of the side walls of the first heat exchange module 4 and the second heat exchange module 6. This structure does not require additional priming volume and is more suitable for infant patients.

[0062] Optionally, the connecting channel 19 is configured not to pass through the gas exchange module 3, so as to avoid interference between the connecting channel 19 and the gas exchange module 3, so that the gas exchange module 3 can be constructed in a regular shape, thereby facilitating the processing of the gas exchange module and not affecting the gas exchange efficiency of the blood, while not affecting the flow of blood in the gas exchange module 3, thereby avoiding the formation of blood clots.

[0063] In this embodiment, the connecting channel 19 includes a first section 191 extending generally parallel to the axis of the gas exchange device, and a second section 192 extending generally perpendicular to the axis of the gas exchange device, thereby avoiding the use of a connecting channel 19 extending in a curve, facilitating processing, and basically not affecting the flow rate of the heat exchange medium in the connecting channel 19.

[0064] Further optionally, one end of the first section 191 is butted against one end of the second section 192, the other end of the first section 191 is butted against the first heat exchange medium chamber 41, and the other end of the second section 192 is butted against the second heat exchange medium chamber 61. The heat exchange medium flows sequentially through the first heat exchange medium chamber 41, the first section 191, the second section 192, and the second heat exchange medium chamber 61, or the heat exchange medium flows sequentially through the second heat exchange medium chamber 61, the second section 192, the first section 191, and the first heat exchange medium chamber 41, thereby shortening the flow path of the heat exchange medium.

[0065] In some embodiments, the side wall of the housing is partially convex outward to form a bump 110, and the inner side of the bump 110 forms a first section 191 of the communication channel 19. The first section 191 is arranged in the convex bump 110 to avoid interference between the first section 191 and other structures inside the gas exchange device, and the first section 191 is easy to process.

[0066] In some embodiments, the shell includes an outer shell 1, a top end cover 9 and a bottom end cover (not shown), wherein the outer shell 1 includes a base 15, and a second section 192 of the connecting channel 19 is formed on the base 15 to avoid interference between the second section 192 and other structures inside the gas exchange device and to facilitate processing of the second section 192.

[0067] like Figure 1 , Figure 2 and Figure 3 As shown, the housing 1 further includes a first housing 16 and a second housing 17, one end of the first housing 16 is connected to the base 15 through a plug-in structure, the other end of the first housing 16 is connected to one end of the second housing 17 through a plug-in structure, the gas exchange module 3 is arranged in the first housing 16 and the second housing 17, and the first heat exchange module 4 is arranged between the gas exchange module 3 and the second housing 17. The other end of the second housing 17 is also connected to a top end cap 9 through a plug-in structure, and the end of the base 15 away from the first housing 16 is connected to a bottom end cap (not shown), and the top end cap 9 and the bottom end cap are used to close the housing 1 to form a closed cavity with the housing 1.

[0068] In the axial direction of the gas exchange device, the position of the heat exchange medium inlet 13 is substantially aligned with the position of the heat exchange medium outlet 14. Optionally, one of the heat exchange medium inlet 13 and the heat exchange medium outlet 14 is disposed on the second housing 17, and the other is disposed on the base 15.

[0069] In some embodiments, Figure 4-5As shown, the base 15 is provided with a bottom heat exchange channel 7, which includes a first bottom heat exchange channel 71 and a second bottom heat exchange channel 72. One end of the first bottom heat exchange channel 71 is connected to one of the heat exchange medium inlet 13 and the heat exchange medium outlet 14, the other end of the first bottom heat exchange channel 71 is connected to one side of the second heat exchange module 6, the other side of the second heat exchange module 6 is connected to one end of the second bottom heat exchange channel 72, and the other end of the second bottom heat exchange channel 72 is connected to the connecting channel 19. The heat exchange medium flows through the heat exchange medium inlet 13, the first bottom heat exchange channel 71, the second heat exchange module 6, the second bottom heat exchange channel 72, the connecting channel 19, the first heat exchange module 4 and the heat exchange medium outlet 14 in sequence. Alternatively, the heat exchange medium flows through the heat exchange medium inlet, the first heat exchange module 4, the connecting channel 19, the second bottom heat exchange channel 72, the second heat exchange module 6, the first bottom heat exchange channel 71 and the heat exchange medium outlet in sequence.

[0070] Optionally, the bottom heat exchange channel 7 is an annular structure, and two second partition plates 62 are provided in the bottom heat exchange channel 7 , and the second partition plates 62 divide the bottom heat exchange channel 7 into a first bottom heat exchange channel 71 and a second bottom heat exchange channel 72 .

[0071] In some embodiments, reference Figure 3-5 and Figure 8 As shown, the second heat exchange module 6 is a double-layer cylindrical structure, a blood flow channel 2 is arranged on the radial inner side of the inner layer of the second heat exchange module 6, the gas exchange module 3 is sleeved on the outer periphery of the outer layer of the second heat exchange module 6, the inner and outer layers of the second heat exchange module 6 are connected at one end, and a second heat exchange medium chamber 61 is formed between the inner and outer layers, two second partition plates 62 extend into the inner second heat exchange medium chamber 61 respectively, and divide the second heat exchange medium chamber 61 into a third heat exchange chamber 611 and a fourth heat exchange chamber 612, one end of the third heat exchange chamber 611 is connected to the other end of the first bottom heat exchange channel 71, the other end of the third heat exchange chamber 611 is connected to one end of the fourth heat exchange chamber 612, and the other end of the fourth heat exchange chamber 612 is connected to one end of the second bottom heat exchange channel 72. The heat exchange medium flows through the heat exchange medium inlet 13, the first bottom heat exchange channel 71, the third heat exchange chamber 611, the fourth heat exchange chamber 612, the second bottom heat exchange channel 72, the connecting channel 19, the first heat exchange module 4 and the heat exchange medium outlet 14 in sequence; or, the heat exchange medium flows through the heat exchange medium inlet, the first heat exchange module 4, the connecting channel 19, the second bottom heat exchange channel 72, the fourth heat exchange chamber 612, the third heat exchange chamber 611, the first bottom heat exchange channel 71 and the heat exchange medium outlet in sequence. In the process of the heat exchange medium flowing through the third heat exchange chamber 611 and the fourth heat exchange chamber 612, the heat exchange medium not only exchanges heat with the blood in the gas exchange module 3, but also exchanges heat with the blood in the blood channel 2, thereby increasing the area of ​​blood heat exchange, thereby improving the heat exchange efficiency of the gas exchange device.

[0072] In some embodiments, reference Figure 3 , Figure 6 and Figure 7 As shown, the first heat exchange module 4 includes a single-layer heat exchange tube 43 in a cylindrical shape. The heat exchange tube 43 is sleeved on the outside of the gas exchange module 3 , and a first heat exchange medium chamber 41 is formed between the heat exchange tube 43 and the shell 1 .

[0073] Optionally, two first partition plates 42 are provided at one end where the first shell 16 and the second shell 17 are connected. The two first partition plates 42 extend into the first heat exchange medium chamber 41 respectively and divide the first heat exchange medium chamber 41 into a first heat exchange chamber 411 and a second heat exchange chamber 412 .

[0074] Furthermore, one end of the first heat exchange chamber 411 is connected to the connecting channel 19 , the other end of the first heat exchange chamber 411 is connected to one end of the second heat exchange chamber 412 , and the other end of the second heat exchange chamber 412 is connected to one of the heat exchange medium inlet 13 and the heat exchange medium outlet 14 .

[0075] In some embodiments, in combination Figure 5 and Figure 8 As shown, in the axial direction of the gas exchange device, the position of the blood inlet 11 is roughly aligned with the position of the blood outlet 12. Optionally, the blood inlet 11 is arranged on the base 15, the blood outlet 12 is arranged on the first shell 16, and the blood outlet 12 is arranged corresponding to the lower end of the gas exchange module 3, one end of the blood flow channel 2 formed on the inner side of the inner layer of the second heat exchange module 6 is connected to the blood inlet 11, and the other end is connected to the upper end of the gas exchange module 3, and the blood flows in from the blood inlet 11, flows through the blood flow channel 2 and the gas exchange module 3 in sequence, and then flows from the lower end of the gas exchange module 3 to the blood outlet 12 and flows out through the blood outlet 12; in other feasible embodiments, the blood inlet and the blood outlet can also be exchanged, and the specific flow path is not repeated here.

[0076] refer to Figure 5 and Figure 8 Since the blood inlet 11 is arranged on the base 15, in order to facilitate the setting of the blood flow channel 2, a blood inflow channel 8 is arranged on the base 15, one end of the blood inflow channel 8 is connected to the blood inlet 11, and the other end of the blood inflow channel 8 is connected to the blood flow channel 2. The blood flows through the blood inlet 11, the blood inflow channel 8, the blood flow channel 2, the gas exchange module 3 and the blood outlet 12 in sequence. Optionally, the blood inflow channel 8 is eccentrically arranged with the blood flow channel 2, and further preferably, the blood inflow channel 8 is substantially tangent to the blood flow channel 2, so that when the blood enters the blood flow channel 2, it rotates in the blood flow channel 2, thereby avoiding blood damage caused by blood impact.

[0077] Further, refer to Figure 2 , 3 8. In order to better guide the blood flow channel 2 and reduce the blood pre-filling volume, a guide cone 21 is also provided in the blood flow channel 2.

[0078] Obviously, the above embodiments of the present invention are merely examples for the purpose of clearly illustrating the present invention, and are not intended to limit the implementation methods of the present invention. For those skilled in the art, various obvious changes, readjustments and substitutions can be made without departing from the scope of protection of the present invention. It is not necessary and impossible to list all implementation methods here. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention shall be included in the scope of protection of the claims of the present invention.

Claims

1. A gas exchange device comprising: A shell, wherein the shell is provided with a blood inlet (11), a blood outlet (12), a heat exchange medium inlet (13) and a heat exchange medium outlet (14); A gas exchange module (3) is arranged inside the housing, and the blood flowing in from the blood inlet (11) can flow through the gas exchange module (3) to exchange gases with the gas exchange module (3), and then flow out from the blood outlet (12); A first heat exchange module (4) is arranged radially outside the gas exchange module (3) and is used to perform heat exchange with blood flowing through the gas exchange module (3); a first heat exchange medium chamber (41) is formed inside the first heat exchange module (4); a second heat exchange module (6), arranged radially inwardly of the gas exchange module (3), for exchanging heat with blood flowing through the gas exchange module (3), a second heat exchange medium chamber (61) being formed inside the second heat exchange module (6); and A communication channel (19) is arranged inside the housing; It is characterized in that The heat exchange medium can flow in from the heat exchange medium inlet (13), flow through the first heat exchange medium chamber (41), the connecting passage (19), the second heat exchange medium chamber (61) in sequence, and then flow out from the heat exchange medium outlet (14); or The heat exchange medium can flow in from the heat exchange medium inlet (13), flow through the second heat exchange medium chamber (61), the connecting channel (19), the first heat exchange medium chamber (41) in sequence, and then flow out from the heat exchange medium outlet (14).

2. The gas exchange device according to claim 1, characterized in that The heat exchange medium flows through the communication channel (19) only once during the process of flowing from the heat exchange medium inlet (13) to flowing out from the heat exchange medium outlet (14).

3. The gas exchange device according to claim 1, characterized in that: There is one and only one communicating channel (19).

4. The gas exchange device according to any one of claims 1 to 3, characterized in that: The first heat exchange medium chamber (41) and / or the second heat exchange medium chamber (61) are not fluidically connected to the blood, and the heat exchange medium can exchange heat with the blood flowing through the gas exchange module (3) through at least part of the side wall of the first heat exchange module (4) and / or the second heat exchange module (6).

5. The gas exchange device according to any one of claims 1 to 3, characterized in that: The communication channel (19) is configured not to penetrate the gas exchange module (3).

6. The gas exchange device according to claim 5, characterized in that The communication channel (19) comprises a first section (191) extending substantially parallel to the axis of the gas exchange device, and a second section (192) extending substantially perpendicular to the axis of the gas exchange device.

7. The gas exchange device according to claim 6, characterized in that One end of the first section (191) is connected to one end of the second section (192), the other end of the first section (191) is connected to the first heat exchange medium chamber (41), and the other end of the second section (192) is connected to the second heat exchange medium chamber (61).

8. The gas exchange device according to claim 6, characterized in that The side wall of the shell partially protrudes outward to form a convex block (110), and the inner side of the convex block (110) forms the first section (191) of the connecting channel (19).

9. The gas exchange device according to claim 6, characterized in that: The housing comprises a base (15), and the second section (192) of the communication channel (19) is formed on the base (15).

10. The gas exchange device according to any one of claims 1 to 3, characterized in that: In the axial direction of the gas exchange device, the position of the heat exchange medium inlet (13) is substantially aligned with the position of the heat exchange medium outlet (14); and / or In the axial direction of the gas exchange device, the position of the blood inlet (11) is roughly aligned with the position of the blood outlet (12).

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