CN217504439U

CN217504439U - Heat exchanger and oxygenator

Info

Publication number: CN217504439U
Application number: CN202220498769.0U
Authority: CN
Inventors: 赖亚明; 黄健兵; 刘新
Original assignee: Chengdu Saihenger Medical Technology Co ltd; Guangzhou National Laboratory
Current assignee: Chengdu Saihenger Medical Technology Co ltd; Guangzhou National Laboratory
Priority date: 2022-03-09
Filing date: 2022-03-09
Publication date: 2022-09-27
Anticipated expiration: 2032-03-09

Abstract

The disclosed embodiments disclose a heat exchanger and an oxygenator. Wherein, the heat exchanger includes: a heat exchanger housing; the heat medium pipe bundle is used for accommodating a heat medium, the heat medium pipe bundle is accommodated in the heat exchanger shell, a heat exchange cavity is formed between the heat exchanger shell and each heat medium pipe bundle, and the heat exchanger shell and the heat medium pipe bundles are made of metal materials, so that heat exchange and isolation of blood and the heat medium are realized, processing and miniaturization are facilitated, and heat exchange efficiency is also improved.

Description

Heat exchanger and oxygenator

Technical Field

The present disclosure relates to the field of medical devices, and in particular to heat exchangers and oxygenators.

Background

The heat exchanger for Extracorporeal Membrane Oxygenation (ECMO) can heat blood to a temperature slightly higher than body temperature, and in order to avoid hemolysis and bubble formation, the upper limit temperature is, for example, about 40 ℃, and some temperature changers can achieve the function of temperature reduction. The heat exchanger adopting the polypropylene (PP) capillary tube needs complex processes of weaving, sealing, cutting and the like in the manufacturing process, the process difficulty is high, and the quality is not easy to control; the heat exchanger adopting the stainless steel fins has narrow gaps between the stainless steel fins, so that the blood flow velocity can be further reduced after the formation of the micro thrombus, and the thrombus is easy to expand. And the two heat exchangers are not verified by the calculation of hemodynamics, and if blood cells in blood cannot return to a human body for a long time, thrombus can be formed. In areas of high fluid shear, blood cells can also be destroyed, leading to hemolysis and inflammatory reactions.

SUMMERY OF THE UTILITY MODEL

To address the problems in the related art, embodiments of the present disclosure provide a heat exchanger and an oxygenator.

In a first aspect, an embodiment of the present disclosure provides a heat exchanger, including:

a heat exchanger housing;

a heat medium pipe bundle for accommodating a heat medium,

the heat medium pipe bundle is accommodated in the heat exchanger shell at an intermediate position,

the heat exchanger shell and each heat medium pipeline bundle form a heat exchange cavity,

the heat exchanger shell and the heat medium pipeline bundle are made of metal materials.

With reference to the first aspect, the present disclosure provides, in a first implementation form of the first aspect,

the heat medium pipeline bundle is of a hollow annular structure,

the heat exchanger further comprises:

a heat medium sealing cover hermetically connected to the inside of the upper end of the heat exchanger shell,

the heat medium sealing cover comprises an isolating ring, the isolating ring forms an annular structure with an inner annular wall for sealing, the space outside the isolating ring in the heat medium sealing cover is communicated with the upper end of the heat medium pipeline bundle,

the space inside the isolating ring in the heat medium sealing cover is communicated with the heat exchange cavity;

the heat exchanger lower cover is communicated with the lower end of the heat medium pipeline bundle and is hermetically connected with the lower end of the heat exchanger shell;

the heat exchanger lower cover comprises a lower cover middle partition plate, and two sides of the lower cover middle partition plate are respectively communicated with a first heat medium interface and a second heat medium interface.

With reference to the first implementation manner of the first aspect, in a second implementation manner of the first aspect, the present disclosure further includes:

a heat exchanger upper grate located between the heat medium sealing cover and the upper end of the heat medium pipe bundle,

a heat exchanger lower grate located between the lower end of the heat medium pipe bundle and the heat exchanger lower cover,

the heat exchanger upper grate is provided with a through hole corresponding to the upper end of the heat medium pipeline bundle, the outer edge of the heat exchanger upper grate is hermetically connected with the heat medium sealing cover, and the through hole of the heat exchanger upper grate is hermetically connected with the upper end of the heat medium pipeline bundle; and/or

The heat exchanger lower grate is provided with a through hole corresponding to the lower end of the heat medium pipeline bundle, the outer edge of the heat exchanger lower grate is hermetically connected with the heat exchanger lower cover, and the through hole of the heat exchanger lower grate is hermetically connected with the lower end of the heat medium pipeline bundle.

With reference to the second implementation manner of the first aspect, in a third implementation manner of the first aspect,

the lower part of the upper grate of the heat exchanger is in a vault shape; and/or

The upper part of the lower grate of the heat exchanger is in a circular truncated cone shape, and a generatrix of the circular truncated cone is an arc line.

With reference to the first implementation manner of the first aspect, in a fourth implementation manner of the first aspect,

the upper part of the heat medium sealing cover is provided with a heat exchanger upper cover,

the heat exchanger upper cover includes: the oxygenation section is combined with the edge and the central through hole,

the oxygenation section combining edge of the upper cover of the heat exchanger is hermetically connected with the outer edge of the heat medium sealing cover,

the center of the top of the heat medium sealing cover is provided with a channel, and the channel is communicated with the isolating ring.

With reference to the fourth implementation manner of the first aspect, in a fifth implementation manner of the first aspect,

the upper part of the heat exchanger upper cover is hermetically connected with an exhaust assembly; and/or a fluid inlet assembly for the fluid,

the fluid inlet assembly comprises: the fluid passage is arranged on the outer side of the shell,

the fluid channel is communicated with the central through hole of the heat exchanger upper cover and keeps a certain angle with the central through hole of the heat exchanger upper cover,

the exhaust assembly is connected with the central through hole of the upper cover of the heat exchanger and used for exhausting gas.

With reference to the fifth implementation manner of the first aspect, in a sixth implementation manner of the first aspect,

the fluid inlet assembly comprises: a baffle plate is arranged on the bottom of the groove,

the fluid channel is communicated with the central through hole of the upper cover of the heat exchanger through the baffle plate; and/or

The exhaust assembly includes: and the exhaust hole is communicated with the central through hole of the upper cover of the heat exchanger.

With reference to the fifth implementation manner of the first aspect, in a seventh implementation manner of the first aspect,

further comprising:

and the central pipe is positioned in the middle of the heat exchanger, penetrates through the isolating ring in the heat medium sealing cover and the central through hole of the heat exchanger upper cover, and is tightly connected with the fluid inlet assembly, the exhaust assembly and the heat exchanger lower cover.

With reference to the seventh implementation manner of the first aspect, in an eighth implementation manner of the first aspect,

the heat exchanger upper grate and the heat exchanger lower grate are both provided with central through holes, and the central pipe penetrates through the central through holes of the heat exchanger upper grate and the heat exchanger lower grate.

With reference to the eighth implementation manner of the first aspect, in a ninth implementation manner of the first aspect,

the upper diameter of the central tube is smaller than the lower diameter,

a first continuous annular space is formed between the outer side of the upper part of the central pipe and the inner side of the isolating ring of the heat medium sealing cover,

the outside of the upper part of the central tube and the central through hole of the upper grate of the heat exchanger form a second continuous annular space.

With reference to the ninth implementation manner of the first aspect, in a tenth implementation manner of the first aspect,

the heat exchanger housing includes thereon: a fluid outlet.

With reference to the tenth implementation manner of the first aspect, in an eleventh implementation manner of the first aspect,

blood flows through the fluid channel, the first continuous annular space, the second continuous annular space, the heat exchange cavity, to the fluid outlet,

the cross-sectional area of the fluid passage is less than or equal to the cross-sectional area of the first continuous annular space,

the cross-sectional area of the first continuous annular space is less than or equal to the cross-sectional area of the second continuous annular space,

the cross-sectional area of the second continuous annular space is less than or equal to the cross-sectional area of the heat exchange cavity,

the sectional area of the heat exchange cavity is smaller than or equal to that of the fluid outlet.

In a second aspect, an oxygenator is provided in an embodiment of the present disclosure, comprising:

the heat exchanger of any one of the first to eleventh implementations of the first aspect;

a fluid inlet assembly and an exhaust assembly;

a heat exchanger upper cover located below the fluid inlet assembly and the exhaust assembly;

an oxygenator housing located below the heat exchanger upper cover;

an oxygenator lower cover located below the oxygenator housing,

an oxygenation membrane wire cavity is formed between the oxygenator shell and the heat exchanger shell and used for accommodating an oxygenation membrane wire,

the fluid outlet of the heat exchanger is communicated with the oxygenation membrane filament cavity,

the oxygenator lower cover is the heat exchanger lower cover.

With reference to the second aspect, the present disclosure provides, in a first implementation form of the second aspect,

the oxygenator lower cover includes: and the lower cover oxygenation section combining edge is positioned between the central pipe combining edge of the oxygenator lower cover and the outer edge of the oxygenator lower cover and is hermetically connected with the outer edge of the heat exchanger lower grate.

With reference to the first implementation manner of the second aspect, in a second implementation manner of the second aspect,

the heat exchanger upper cover includes: a first oxygen channel communicated with the first end of the oxygenation membrane wire,

the oxygenator lower cover includes: the second oxygen channel is communicated with the second end of the oxygenation membrane wire.

With reference to the second aspect, the present disclosure, in a third implementation form of the second aspect,

the oxygenator housing includes: the blood flows out of the channel.

With reference to the third implementation manner of the second aspect, in a fourth implementation manner of the second aspect,

the blood outflow channel is located at an upper portion of the oxygenator housing.

The technical scheme provided by the embodiment of the disclosure can have the following beneficial effects:

according to the technical scheme provided by the embodiment of the disclosure, the heat exchanger comprises: a heat exchanger housing; the heat medium pipe bundle is used for accommodating a heat medium, the heat medium pipe bundle is accommodated in the heat exchanger shell, a heat exchange cavity is formed between the heat exchanger shell and the heat medium pipe bundle and used for accommodating blood, and the heat exchanger shell and the heat medium pipe bundle are made of metal materials, so that heat exchange and isolation of the blood and the heat medium are realized, convenience is brought to processing and miniaturization, and heat exchange efficiency is also improved.

It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the disclosure.

Drawings

Other features, objects, and advantages of the present disclosure will become more apparent from the following detailed description of non-limiting embodiments when taken in conjunction with the accompanying drawings. In the drawings:

fig. 1 shows a block diagram of a heat exchanger and oxygenator using polypropylene according to an embodiment of the present disclosure.

Fig. 2 illustrates an exemplary external structural view of an oxygenator according to an embodiment of the present disclosure.

Fig. 3 shows an exemplary component diagram of an oxygenator, according to an embodiment of the present disclosure.

Fig. 4 shows an exemplary cross-sectional view of an oxygenator according to an embodiment of the present disclosure.

Figure 5a shows a schematic structural diagram of a center tube according to an embodiment of the present disclosure.

FIG. 5b shows a cross-sectional view of a heat exchanger with a center tube removed according to an embodiment of the present disclosure.

Fig. 5c illustrates a cross-sectional view of a heat exchanger according to an embodiment of the present disclosure.

Fig. 6a shows a schematic structural view of an upper cover of a heat exchanger according to an embodiment of the present disclosure.

FIG. 6b illustrates a cross-sectional view of a heat exchanger top cover according to an embodiment of the present disclosure.

Fig. 7 shows an exemplary schematic of an oxygenator lower cap, according to an embodiment of the present disclosure.

FIG. 8a shows a schematic view of a fluid inlet assembly and an exhaust assembly in positional relationship according to an embodiment of the present disclosure.

FIG. 8b illustrates a cross-sectional view of the positional relationship of the fluid inlet assembly and the exhaust assembly according to an embodiment of the present disclosure.

Fig. 9 illustrates an exemplary schematic of blood flow in a fluid inlet assembly and an exhaust assembly according to an embodiment of the present disclosure.

FIG. 10a shows an exemplary schematic view of an upper grate of a heat exchanger according to an embodiment of the present disclosure.

FIG. 10b illustrates an exemplary cross-sectional view of an upper grate of a heat exchanger according to one embodiment of the present disclosure.

FIG. 11 illustrates an exemplary assembly view of an upper grate of a heat exchanger according to one embodiment of the present disclosure.

FIG. 12a shows an exemplary schematic view of a lower grate of a heat exchanger according to an embodiment of the present disclosure.

FIG. 12b shows an exemplary cross-sectional view of a heat exchanger lower grate according to one embodiment of the present disclosure.

FIG. 13a illustrates a left side view of an exemplary assembly of a heat exchanger lower grate according to an embodiment of the present disclosure.

FIG. 13b illustrates a right side view of an exemplary assembly of a heat exchanger lower grate according to an embodiment of the present disclosure.

Fig. 14 illustrates an exemplary schematic of a blood flow cross-section according to an embodiment of the present disclosure.

Detailed Description

Hereinafter, exemplary embodiments of the present disclosure will be described in detail with reference to the accompanying drawings so that those skilled in the art can easily implement them. Also, for the sake of clarity, parts not relevant to the description of the exemplary embodiments are omitted in the drawings.

In the present disclosure, it is to be understood that terms such as "including" or "having," etc., are intended to indicate the presence of labels, numbers, steps, actions, components, parts, or combinations thereof disclosed in the present specification, and are not intended to exclude the possibility that one or more other labels, numbers, steps, actions, components, parts, or combinations thereof are present or added.

It should also be noted that the embodiments and labels in the embodiments of the present disclosure may be combined with each other without conflict. The present disclosure will be described in detail below with reference to the accompanying drawings in conjunction with embodiments.

The heat exchanger for Extracorporeal Membrane Oxygenation (ECMO) can heat blood to a temperature slightly higher than body temperature, and in order to avoid hemolysis and bubble formation, the upper limit temperature is, for example, about 40 ℃, and some temperature changers can achieve the function of temperature reduction. The heat exchanger adopting the polypropylene (PP) capillary tube needs complex processes of weaving, sealing, cutting and the like in the manufacturing process, has high process difficulty, is difficult to control the quality, is not high-pressure resistant, and is not beneficial to miniaturization; the heat exchanger adopting the stainless steel fins has narrow gaps between the stainless steel fins, so that the blood flow velocity can be further reduced after the micro thrombus is formed, and the thrombus is easy to expand. The two heat exchangers are not verified by the calculation of hemodynamics, and blood cells in blood can form thrombus if the blood cells can not return to a human body for a long time. In areas of high fluid shear, blood cells can also be destroyed, leading to hemolysis and inflammatory reactions.

As shown in fig. 1, a prior art heat exchanger and oxygenator 100 using polypropylene includes: a heat exchanger 101 and an oxygenator 103. A heat medium capillary tube 102 made of polypropylene (PP) in the heat exchanger 101 and an oxygenation membrane wire 104 in the oxygenator 103 are arranged in parallel. The heat exchanger needs complex processes of weaving, sealing glue, cutting glue and the like in the manufacturing process, the process difficulty is high, the quality is not easy to control, and the heat exchanger is not high-pressure resistant and is not beneficial to miniaturization.

To solve the above problems, the present disclosure proposes a heat exchanger and an oxygenator.

It will be understood by those of ordinary skill in the art that fig. 2 illustrates the external structure of the oxygenator, and is not to be construed as limiting the present disclosure.

As shown in fig. 2, the oxygenator 200 includes: a heat exchanger top cover 201, an oxygenator housing 202, an oxygenator bottom cover 203, and a fluid inlet assembly and exhaust assembly 204. The heat exchanger top cover 201 is also an oxygenator top cover.

The fluid inlet assembly and exhaust assembly 204 includes a fluid passage 205, a blood purge valve 206. The fluid channel 205 is used to infuse the oxygenator 200 with blood, and the blood deflation valve 206 is used to release the gases originally in the oxygenator after the blood has been infused to prevent thrombus formation. The heat exchanger top cover 201 includes an oxygen inlet 208. The oxygenator housing 202 includes a blood outflow channel 207. The oxygenator lower cover 203 includes an oxygen outlet 209, a first heating medium port 210, and a second heating medium port 211. The first and second

heating medium ports

210 and 211 are inlets and outlets of a heating medium such as water. In the embodiment of the disclosure, the first heating medium interface 210 and the second heating medium interface 211 can be used as an inlet and an outlet of the heating medium, i.e. the flowing directions of the heating medium can be interchanged.

Fig. 3 shows an exemplary component diagram of an oxygenator according to an embodiment of the present disclosure.

It will be understood by those of ordinary skill in the art that fig. 3 illustrates the components of the oxygenator, and is not to be construed as limiting the present disclosure.

As shown in fig. 3, the oxygenator includes the same heat exchanger upper cover 201, oxygenator housing 202, oxygenator lower cover 203, fluid inlet assembly and exhaust assembly 204 as in fig. 2, and further includes: a heat medium sealing cover 301, a heat exchanger upper grate 302, a heat medium pipe bundle 303, a heat exchanger lower grate 304, a heat exchanger shell 305 and a central pipe 306. The heat medium pipe bundle 303 has a hollow annular structure, and the upper diameter of the central pipe 306 is smaller than the lower diameter.

In the embodiment of the disclosure, during assembly, the central tube 306 is placed into the heat medium sealing cover 301, the heat exchanger upper grate 302, the heat medium pipe bundle 303 and the heat exchanger lower grate 304, the heat medium sealing cover 301, the heat exchanger upper grate 302, the heat medium pipe bundle 303 and the heat exchanger lower grate 304 are placed into the heat exchanger shell 305, the heat exchanger shell 305 is placed into the oxygenator housing 202, the upper end of the oxygenator housing 202 is hermetically connected with the heat exchanger upper cover 201, the heat exchanger upper cover 201 is hermetically connected with the fluid inlet assembly and the exhaust assembly 204, and the lower end of the oxygenator housing 202 is hermetically connected with the oxygenator lower cover 203. The oxygenator lower cover 203 is also a heat exchanger lower cover.

In the embodiment of the present disclosure, the heat exchanger upper cover 201, the oxygenator housing 202, the oxygenator lower cover 203, the fluid inlet assembly and exhaust assembly 204, the heat medium sealing cover 301, the heat medium pipe bundle 303, the heat exchanger housing 305, and the central pipe 306 may all be made of metal, and the heat exchanger upper grate 302 and the heat exchanger lower grate 304 may be made of metal.

It will be understood by those of ordinary skill in the art that fig. 4 illustrates a cross-section of an oxygenator, and is not to be construed as limiting the present disclosure.

As shown in fig. 4, in the oxygenator 400, the heat exchanger housing 305 inside part is a heat exchanger, and the heat exchanger housing 305 outside part is an oxygenating part. With reference to fig. 5, the heat exchanger comprises: heat exchanger shell 305, heat medium stream 303. A heat medium such as water flows in the heat medium tubing bundle 303 and blood flows in the heat exchange chamber 401 between the heat exchanger housing 305 and the heat medium tubing bundle 303, thereby effecting heat exchange between the heat medium and the blood to heat the blood. Also, the space in the blood flow chamber 401 outside the heat medium tubing bundle 303 is isolated from the internal space of the heat medium tubing bundle 303.

In the disclosed embodiment, the center tube 306 passes through the spacer ring 404 of the heat medium sealing cap 301, the heat exchanger upper grate 302, the heat medium tubing bundle 303, and the heat exchanger lower grate 304, and the upper and lower ends of the center tube 306 are respectively tightly connected to the fluid inlet assembly and air exhaust assembly 204 and the oxygenator lower cap 203, thereby supporting the internal structure of the oxygenator 400.

In the disclosed embodiment, a heat exchanger upper grate 302 is further provided between the heat medium sealing cap 301 and the upper end of the heat medium tubing bundle 303, and a heat exchanger lower grate 304 is provided between the lower end of the heat medium tubing bundle 303 and the oxygenator lower cap 203. The upper heat exchanger grate 302 and the lower heat exchanger grate 304 are provided with through holes corresponding to the heat medium pipe bundle 303, so that the heat medium flow passage and the blood flow passage are respectively sealed and isolated from each other.

In the disclosed embodiments, the components in the oxygenator through which the heating medium flows are described in detail below.

The heat medium sealing cover 301 is hermetically connected to the inside of the upper end of the heat exchanger case 305, and the heat medium sealing cover 301 includes a spacer ring 404. The heat medium sealing cover 301 is formed into an annular structure with an inner annular wall sealed by a spacer ring 404. In the heat medium sealing cap 301, the outer ring of the annular structure of the spacer ring 404 communicates with the upper end of the heat medium pipe bundle 303. The inner space of the spacer ring 404 communicates with the heat exchange chamber 401.

The heat exchanger lower cover 203 (i.e., the oxygenator lower cover 203) communicates with the lower end of the heat medium pipe bundle 303 and is hermetically connected to the lower end of the heat exchanger case 202.

As shown in fig. 7, the heat exchanger lower cover 203 includes a lower cover middle partition 704, and both sides of the lower cover middle partition 704 are respectively communicated with the first heat medium port 210 and the second heat medium port 211.

In the embodiment of the present disclosure, when the heat medium such as water flows from the first heat medium port 210 into the first heat medium port rear space 705 at the side of the lower cover middle partition 704 of the heat exchanger lower cover 203 and flows upward into the first part of the heat medium pipe bundle 303. The heat medium flows into the heat medium sealing cap 301 from the first part of the heat medium pipe bundle 303, then flows downward into the second part of the heat medium pipe bundle 303 except the first part, flows into the second heat medium port rear space 706 on the other side of the lower cap middle partition 704 of the heat exchanger lower cap 203, and finally flows out of the second heat medium port 211. The blood in the heat exchange chamber 401 sufficiently exchanges heat outside the heat medium flowing in the heat medium pipe bundle 303 and the heat medium pipe bundle 303, thereby heating the blood.

In the disclosed embodiments, the components in the oxygenator through which blood flows are described in detail below.

In an embodiment of the present disclosure, blood flows from the fluid channel 205 of the fluid inlet assembly and exhaust assembly 204. After the blood is injected, the blood deflation valve 206 is opened to release the air in the heat medium sealing cover 301 and the heat exchange cavity 401, and then the blood deflation valve 206 is closed to avoid the thrombus in the blood. The fluid channel 205 and the central through hole of the heat exchanger upper cover 201 are communicated at a certain angle, and further the fluid channel and the central channel of the heat medium sealing cover 301 are communicated at a certain angle, communicated to the channel arranged at the center of the top of the heat medium sealing cover 301 and communicated to the inner space of the isolating ring 404 of the heat medium sealing cover 301, so that blood enters the heat exchange cavity 401 in a spiral shape, the blood and the heat medium are subjected to sufficient heat exchange, and the occurrence of thrombus is avoided. The heat exchanger housing 305 includes a fluid outlet 403 therein. An oxygenation membrane filament chamber 402 is formed between the heat exchanger housing 305 and the oxygenator housing 202. The descending, heat-exchanged blood enters the oxygenation membrane filament chamber 402 via the fluid outlet 403, and then flows out of the oxygenator from the blood outflow channel 207 after ascending.

In the disclosed embodiments, the components in the oxygenator through which oxygen flows are described in detail below.

In an embodiment of the present disclosure, an oxygenation membrane filament is placed longitudinally in oxygenation membrane filament chamber 402. The first oxygen channel 208 of the heat exchanger upper cover 201 is communicated with the first end of the oxygenation membrane wire; the second end of the oxygenation membrane wire is communicated with the second oxygen channel 209 of the oxygenator lower cover 203. After oxygen enters from the first oxygen channel 208, the oxygen and carbon dioxide exchange is carried out in the oxygenation membrane wire cavity 402 with blood, oxygenation is realized, and carbon dioxide is carried out from the second oxygen channel 209.

In the embodiment of the present disclosure, the blood outflow channel 207 is disposed at the upper portion of the oxygenator housing 202, so that the region where blood and oxygen flow toward each other in the oxygenation membrane wire chamber 402 is longer, thereby improving oxygenation efficiency.

Figure 5a shows a schematic structural diagram of a center tube according to an embodiment of the present disclosure. FIG. 5b shows a cross-sectional view of a heat exchanger with a center tube removed according to an embodiment of the present disclosure. Fig. 5c illustrates a cross-sectional view of a heat exchanger according to an embodiment of the present disclosure. It will be understood by those of ordinary skill in the art that it is not intended to limit the present disclosure.

As shown in fig. 5, the heat medium sealing cap 301, the heat exchanger upper grate 302, the heat medium pipe bundle 303, and the heat exchanger lower grate 304 of fig. 5b are fitted into the center pipe 306 of fig. 5a, and as shown in fig. 5c, the heat exchanger case 305 is hermetically connected to the outside of the heat medium sealing cap 301 and the heat exchanger lower grate 304 to obtain the heat exchanger. For simplicity, the heat medium stream 303 is not shown in fig. 5 c.

Fig. 6a shows a schematic structural view of a heat exchanger upper cover according to an embodiment of the present disclosure. FIG. 6b shows a cross-sectional view of a heat exchanger top cover according to an embodiment of the present disclosure. It will be understood by those of ordinary skill in the art that it is not intended to limit the present disclosure.

As shown in fig. 6a and 6b, the heat exchanger upper cover 201 is provided with a central through hole 601. As shown in fig. 6, the outer edge of the inner side of the heat exchanger top cover 201 is provided with an oxygenator outer wall combining edge 603 for hermetically combining with the upper end of the oxygenator housing 202; the middle part of the inner side of the heat exchanger upper cover 201 is provided with an oxygenation section combining edge 602 which is used for being combined with the upper end of the heat exchanger shell 305 in a sealing way.

Fig. 7 shows an exemplary schematic of an oxygenator under cover according to an embodiment of the present disclosure.

It will be understood by those of ordinary skill in the art that fig. 7 illustrates an oxygenator lower cover, without limiting the present disclosure.

In the embodiment of the present disclosure, the periphery of the inner side of the oxygenator lower cover 203 comprises an oxygenator outer wall combining edge 701 for hermetically combining with the lower end of the oxygenator housing 202; the inside middle part of the oxygenator lower cover 203 includes: an oxygenation section engagement edge 702 and a central cylinder engagement edge 703. The oxygenating section coupling rim 702 is adapted to sealingly engage the lower end of the heat exchanger housing 305 and the central tube coupling rim 703 is adapted to sealingly engage the lower end of the central tube 306.

In the disclosed embodiment, the space between the oxygenation section engagement edge 702 and the central tube engagement edge 703 is divided into two

portions

705, 706 by a bottom cover center divider 704, which are in communication with the first heating medium port 210 and the second heating medium port 211, respectively. The space between the oxygenator outer wall combining edge 701 and the oxygenation section combining edge 702 corresponds to the position of the oxygenation membrane silk cavity 402.

FIG. 8a shows a schematic view of a fluid inlet assembly and an exhaust assembly in positional relationship according to an embodiment of the present disclosure. FIG. 8b illustrates a cross-sectional view of the positional relationship of the fluid inlet assembly and the exhaust assembly according to an embodiment of the present disclosure. It will be understood by those of ordinary skill in the art that it is not intended to limit the present disclosure.

As shown in fig. 8a and 8b, the fluid inlet assembly and vent assembly 204 includes a fluid channel 205, the fluid channel 205 is connected to the interior of the fluid inlet assembly and vent assembly 204 via a baffle 801 at an angle, and is connected to the central through hole 601 of the oxygenator cover 201 at an angle as described above. A blood deflation valve 206 is connected to the fluid channel 205 for deflating the blood.

It will be appreciated by those of ordinary skill in the art that fig. 9 illustrates blood flow in the fluid inlet assembly and the exhaust assembly, and is not to be construed as limiting the present disclosure.

As shown in fig. 9, of the blood flow 900 in the fluid inlet and exhaust assembly, the blood flow 901 from the fluid passageway 205 forms a helical blood flow in the annular space enclosed by the inner wall 904 of the fluid inlet and exhaust assembly and the outer wall 902 of the upper section of the central cylindrical tube. 903 is the blood vent valve position. The heliciform blood flow gets into aforementioned heat transfer chamber 401, can improve heat exchange efficiency to avoid appearing the thrombus. The spiral blood flow also reduces the fluid shearing force, and avoids hemolysis and inflammation reaction caused by the damage of blood cells.

In the disclosed embodiment, the blood flow in fig. 9 can be calculated by, for example, CFD software, and experimentally verified. The blood flow conditions in other locations, such as the blood flow lumen 401, may also be calculated using CFD software. One of ordinary skill in the art will appreciate that other software besides CFD may be used for the calculations, and the present disclosure is not limited thereto.

FIG. 10a shows an exemplary schematic view of an upper grate of a heat exchanger according to an embodiment of the present disclosure. FIG. 10b illustrates an exemplary cross-sectional view of an upper grate of a heat exchanger according to one embodiment of the present disclosure. It will be understood by those of ordinary skill in the art that it is not intended to limit the present disclosure.

As shown in FIGS. 10a and 10b, the lower portion 1001 of the upper heat exchanger grate 302 is dome-shaped to prevent the presence of blood stagnation areas and thrombus. The heat exchanger upper grate 302 has a central through hole 1002 for the center tube 306 to pass through and to achieve a spatial fit between the center tube 306 and the heat exchanger upper grate 302.

It will be understood by those of ordinary skill in the art that fig. 11 is an illustration of an assembled view of the upper grate of the heat exchanger and is not to be construed as limiting the present disclosure.

As shown in fig. 11, the heat exchanger upper grate 302 and the heat medium sealing cap 301 are closely coupled, and the through-holes of the heat exchanger upper grate 302 correspond to the upper ends of the heat medium pipe bundles 303, which are not shown in fig. 11. The lower portion 1001 of the heat exchanger upper grate 302 has a dome radius R10. The vault radius R10 is obtained through fluid dynamics simulation calculation and experimental verification, and the good balance is obtained between the blood flow characteristics and the heat exchange contact surface.

The upper outer side of the central pipe 306 and the spacer ring of the heat medium sealing cover 301 form a first continuous annular space 1101, and the upper outer side of the central pipe 306 and the heat exchanger upper grate 302 form a second continuous annular space 1102. Neither the first continuous annular space 1101 nor the second continuous annular space 1102 has any connecting struts, thereby smoothing the blood flow and avoiding disturbance to the blood flow.

FIG. 12a shows an exemplary schematic view of a heat exchanger lower grate according to an embodiment of the present disclosure. FIG. 12b shows an exemplary cross-sectional view of a heat exchanger lower grate according to one embodiment of the present disclosure. It will be understood by those of ordinary skill in the art that it is not intended to limit the present disclosure.

As shown in fig. 12a and 12b, the upper part 1201 of the heat exchanger lower grate 304 is in the shape of a circular truncated cone, thereby preventing the occurrence of a blood stagnation region and preventing the occurrence of thrombus. The round table shape prevents blood from directly impacting the bottom of the heat exchange cavity, reduces the shearing force of fluid, and avoids hemolysis and inflammation reaction caused by damage of blood cells. The heat exchanger upper grate 304 has a central through hole 1202 for the center tube 306 to pass through and provide a space fit and seal between the center tube 306 and the heat exchanger lower grate 304.

FIG. 13a illustrates a left side view of an exemplary assembly of a heat exchanger lower grate according to an embodiment of the present disclosure. FIG. 13b illustrates a right side view of an exemplary assembly of a heat exchanger lower grate according to an embodiment of the present disclosure. It will be understood by those of ordinary skill in the art that it is not intended to limit the present disclosure.

As shown in fig. 13a and 13b, the upper portion 1201 of the lower heat exchanger grate 304 has a circular truncated cone radius R11. R11 is obtained through fluid dynamic simulation calculation and experimental verification. The heat exchanger lower grate 304 is hermetically connected with the oxygenator lower cover 203. The outer edge of the upper portion 1201 of the heat exchanger lower grate 304 coincides with the lower edge of the fluid outlet 403 of the heat exchanger housing 305, so that blood smoothly flows out of the heat exchanger and enters the oxygenation membrane wire chamber, a blood stagnation region is avoided, and thrombosis is avoided.

It will be understood by those of ordinary skill in the art that FIG. 14 illustrates a cross-section of blood flow in a heat exchanger, and is not intended to limit the present disclosure.

As shown in fig. 14, the blood flow cross section in the fluid channel is a first cross section 1401, the blood flow cross section in the first continuous annular space 1101 in fig. 11 is a second cross section 1402, the blood flow cross section in the second continuous annular space 1102 in fig. 11 is a third cross section 1403, the blood flow cross section in the heat exchange chamber 401 in fig. 4 is a fourth cross section 1404, and the blood flow cross section in the fluid outlet 403 in fig. 4 is a fifth cross section 1405. Blood flows through the first cross-section 1401, the second cross-section 1402, the third cross-section 1403, the fourth cross-section 1404, to the fifth cross-section 1405.

In the embodiment of the present disclosure, the area of the first section 1401 is equal to or less than the area of the second section 1402, the area of the second section 1402 is equal to or less than the area of the third section 1403, the area of the third section 1403 is equal to or less than the area of the fourth section 1404, and the area of the fourth section 1404 is equal to or less than the area of the fifth section 1405, so that the flow velocity of blood in the heat exchanger gradually decreases and turbulence is not easily formed.

In an embodiment of the present disclosure, as set forth above with respect to fig. 3, 4, 5, the heat exchanger includes a heat exchanger housing 305; the heat medium pipe bundle 303 is used for accommodating heat medium, the heat medium pipe bundle 303 is accommodated in the heat exchanger shell 305, a heat exchange cavity 401 is formed between the heat exchanger shell 305 and the heat medium pipe bundle 303 and used for accommodating blood, and the heat exchanger shell 305 and the heat medium pipe bundle 303 are made of metal materials, so that the processing is convenient, the miniaturization is facilitated, and the heat exchange efficiency is also improved.

According to an embodiment of the present disclosure, a heat exchanger is characterized by comprising: a heat exchanger housing; the heat medium pipe bundle is used for accommodating heat media, the heat medium pipe bundle is accommodated in the middle position of the heat exchanger shell, a heat exchange cavity is formed between the heat exchanger shell and each heat medium pipe bundle, and the heat exchanger shell and the heat medium pipe bundles are made of metal materials, so that heat exchange and isolation of blood and the heat media are realized, processing and miniaturization are facilitated, and heat exchange efficiency is also improved.

In an embodiment of the present disclosure, as set forth above with respect to fig. 3, 4, 5, 7, the heat medium pipe bundle 303 is a hollow ring structure, and the heat exchanger further includes: the heat medium sealing cover 301 is hermetically connected to the inside of the upper end of the heat exchanger shell 305, the heat medium sealing cover 301 comprises an isolating ring 404, the space outside the isolating ring 404 in the heat medium sealing cover 301 is communicated with the upper end of the heat medium pipeline bundle 303, and the space inside the isolating ring 404 in the heat medium sealing cover 301 is communicated with the heat exchange cavity 401; a heat exchanger lower cover 203 (i.e., oxygenator lower cover 203) communicating with the lower end of the heat medium pipe bundle 303 and hermetically connected to the lower end of the heat exchanger case 305; the heat exchanger lower cover 203 comprises a lower cover middle partition 704, and two sides of the lower cover middle partition 704 are respectively communicated with the first heating medium connector 210 and the second heating medium connector 211.

According to the embodiment of the present disclosure, by the heat medium pipe bundle being a hollow ring structure, the heat exchanger further includes: the heat medium sealing cover is hermetically connected inside the upper end of the heat exchanger shell and comprises an isolating ring, the heat medium sealing cover is of an annular structure with an inner annular wall sealed by the isolating ring, the outer ring of the annular structure in the heat medium sealing cover is communicated with the upper end of the heat medium pipeline bundle, and the inner space of the isolating ring in the heat medium sealing cover is communicated with the heat exchange cavity; the heat exchanger lower cover is communicated with the lower end of the heat medium pipeline bundle and is hermetically connected with the lower end of the heat exchanger shell; the heat exchanger lower cover comprises a lower cover middle partition plate, and the two sides of the lower cover middle partition plate are respectively communicated with the first heat medium interface and the second heat medium interface, so that a complete heat medium loop is formed, and heat exchange with blood is facilitated.

In an embodiment of the present disclosure, as set forth above with respect to fig. 3, 4, 5, 7, the heat exchanger further comprises: the heat exchanger upper grate 302 is positioned between the heat medium sealing cover 301 and the upper end of the heat medium pipeline bundle 303, the heat exchanger lower grate 304 is positioned between the lower end of the heat medium pipeline bundle 303 and the heat exchanger lower cover 203, the heat exchanger upper grate 302 is provided with a through hole corresponding to the upper end of the heat medium pipeline bundle 303, the outer edge of the heat exchanger upper grate 302 is hermetically connected with the heat medium sealing cover 301, and the through hole of the heat exchanger upper grate 302 is hermetically connected with the upper end of the heat medium pipeline bundle 303; and/or the heat exchanger lower grate 304 has a through hole corresponding to the lower end position of the heat medium pipe bundle 303, the outer edge of the heat exchanger lower grate 304 is hermetically connected with the heat exchanger lower cover 203, and the through hole of the heat exchanger lower grate 304 is hermetically connected with the lower end of the heat medium pipe bundle 303.

According to the embodiment of the present disclosure, by further comprising: the heat exchanger upper grate is positioned between the heat medium sealing cover and the upper end of the heat medium pipeline bundle, the heat exchanger lower grate is positioned between the lower end of the heat medium pipeline bundle and the heat exchanger lower cover, the heat exchanger upper grate is provided with a through hole corresponding to the upper end of the heat medium pipeline bundle, the outer edge of the heat exchanger upper grate is hermetically connected with the heat medium sealing cover, and the through hole of the heat exchanger upper grate is hermetically connected with the upper end of the heat medium pipeline bundle; and/or the lower grate of the heat exchanger is provided with a through hole corresponding to the lower end of the heat medium pipeline bundle, the outer edge of the lower grate of the heat exchanger is hermetically connected with the lower cover of the heat exchanger, and the through hole of the lower grate of the heat exchanger is hermetically connected with the lower end of the heat medium pipeline bundle, so that the sealing of the heat medium flow passage and the blood flow passage is realized, and the mutual isolation of the heat medium flow passage and the blood flow passage is realized.

In the embodiment of the present disclosure, as previously set forth with respect to fig. 10 and 12, the lower portion 1001 of the upper heat exchanger grate 302 is dome-shaped, the upper portion 1201 of the lower heat exchanger grate 304 is truncated cone-shaped, and the generatrix of the truncated cone is curved.

According to the embodiment of the disclosure, the lower part of the upper grate of the heat exchanger is in a vault shape; and/or the upper part of the lower grate of the heat exchanger is in a circular truncated cone shape, and the generatrix of the circular truncated cone is an arc line, so that better balance is obtained between the blood flow characteristic and the heat exchange contact surface, a blood stagnation area is prevented, and thrombus is prevented.

In the embodiment of the present disclosure, as set forth above with respect to fig. 4 and 6, the heat medium sealing cover 301 is provided at an upper portion thereof with the heat exchanger upper cover 201, and the heat exchanger upper cover 201 includes: the oxygenation section combining edge 602 and the central through hole 601, the oxygenation section combining edge 602 of the heat exchanger upper cover 201 is hermetically connected with the outer edge of the heat medium sealing cover 301, and a channel is arranged in the center of the top part 301 of the heat medium sealing cover and communicated with the isolating ring 404.

According to this disclosed embodiment, the upper portion through the sealed lid of heat medium is provided with the heat exchanger upper cover, and the heat exchanger upper cover includes: the heat exchanger comprises an oxygenation section combination edge and a central through hole, the oxygenation section combination edge of an upper cover of the heat exchanger is hermetically connected with the outer edge of a heat medium sealing cover, a channel is arranged in the center of the top of the heat medium sealing cover and communicated with an isolation ring, and therefore blood is provided for the heat exchanger, and heat exchange is carried out between the blood and the heat medium.

In the embodiment of the present disclosure, as set forth in fig. 2, 3, 4, and 8, a fluid inlet assembly and an exhaust assembly 204 is hermetically connected to an upper portion of the heat exchanger upper cover 201, and the fluid inlet assembly and the exhaust assembly 204 includes: the fluid channel 205, the fluid channel 205 and the central through hole 601 of the heat exchanger upper cover 201 are communicated with each other at a certain angle, and further communicated with a channel arranged at the center of the top of the heat medium sealing cover at a certain angle.

In an embodiment of the present disclosure, as set forth above with respect to fig. 3, 4, 8, the fluid exhaust assembly comprises: the blood deflation valve is communicated with the fluid channel.

According to the embodiment of the present disclosure, a fluid inlet assembly and/or an exhaust assembly is connected through an upper portion of an upper cover of a heat exchanger, the fluid inlet assembly including: the fluid channel, the fluid channel and the fluid channel are communicated with the central through hole of the heat exchanger upper cover and keep a certain angle with the central through hole of the heat exchanger upper cover, so that blood is injected into the heat exchanger in a spiral mode, and thrombus is prevented and treated.

According to the embodiment of the disclosure, the central through hole of the exhaust assembly and the upper cover of the heat exchanger is used for releasing gas, so that thrombus is prevented.

According to an embodiment of the present disclosure, a fluid inlet assembly includes: the fluid channel is communicated with the central through hole of the upper cover of the heat exchanger through the baffle plate; and/or the exhaust assembly comprises: and the exhaust hole is communicated with the central through hole of the upper cover of the heat exchanger, so that spiral blood flow is formed and gas is exhausted.

In an embodiment of the present disclosure, as set forth above with respect to fig. 3, 4, 5, the heat exchanger comprises: and a central pipe 306 which is positioned in the middle of the heat exchanger, penetrates through a central through hole 601 of the upper cover 201 of the heat exchanger of the isolating ring 404 in the heat medium sealing cover 301, and is tightly connected with the fluid inlet assembly, the exhaust assembly 204 and the lower cover 203 of the heat exchanger.

According to the embodiment of the disclosure, the heat exchanger and the oxygenator are supported by the central pipe which is positioned in the middle of the heat exchanger, passes through the isolation ring in the heat medium sealing cover and the central through hole of the heat exchanger upper cover, and is tightly connected with the exhaust assembly and/or the fluid inlet assembly and the heat exchanger lower cover.

In an embodiment of the present disclosure, as previously set forth with respect to fig. 10 and 12, the heat exchanger upper grate 302 and the heat exchanger lower grate 304 have central through

holes

1002, 1202, respectively, and the center tube 306 passes through the central through hole 1002 of the heat exchanger upper grate and the central through hole 1202 of the heat exchanger lower grate.

According to the embodiment of the disclosure, the upper grate and the lower grate of the heat exchanger are respectively provided with the central through hole, and the central pipe passes through the central through hole of the upper grate of the heat exchanger and the central through hole of the lower grate of the heat exchanger, so that the spatial matching among the upper grate, the lower grate and the central pipe of the heat exchanger is realized, blood passes through the upper grate of the heat exchanger to smoothly flow, and the sealing between the central pipe and the lower grate of the heat exchanger is realized.

In the embodiment of the present disclosure, as stated above with respect to fig. 11, the upper diameter of the central tube 306 is smaller than the lower diameter, a first continuous annular space 1101 is formed between the outer side of the upper portion of the central tube and the inner side of the spacer ring of the heat medium sealing cap, and a second continuous annular space 1102 is formed between the outer side of the upper portion of the central tube and the central through hole of the upper grate of the heat exchanger. Neither the first continuous annular space 1101 nor the second continuous annular space 1102 has any connecting struts therein.

A first continuous annular space is formed between the outer side of the upper part of the central pipe and the inner side of the isolating ring of the heat medium sealing cover, and a second continuous annular space is formed between the outer side of the upper part of the central pipe and the central through hole of the upper grate of the heat exchanger, so that blood flow is smooth, and disturbance to the blood flow is avoided.

In an embodiment of the present disclosure, as set forth above with respect to fig. 4, 13, the bottom of the heat exchanger housing 305 comprises: a fluid outlet 403.

According to an embodiment of the present disclosure, a bottom portion of a shell of a heat exchanger includes: the fluid outlet is communicated with the heat exchange cavity 401 and the oxygenation membrane wire cavity 402 of the heat exchanger, so that the integrated design of the heat exchange part and the oxygenation part in the oxygenator is realized, and the oxygenator is convenient to miniaturize and use.

In an embodiment of the present disclosure, as previously stated for fig. 14, the blood flow cross-section in the fluid channel is a first cross-section 1401, the blood flow cross-section of the first continuous annular space 1101 in fig. 11 is a second cross-section 1402, the blood flow cross-section of the second continuous annular space 1102 in fig. 11 is a third cross-section 1403, the blood flow cross-section of the heat exchange chamber 401 in fig. 4 is a fourth cross-section 1404, and the blood flow cross-section of the fluid outlet 403 in fig. 4 is a fifth cross-section 1405.

In an embodiment of the present disclosure, blood flows from the first cross-section 1401 through the second cross-section 1402, the third cross-section 1403, the fourth cross-section 1404 to the fifth cross-section 1405. The area of the first cross section 1401 is equal to or smaller than the area of the second cross section 1402, the area of the second cross section 1402 is equal to or smaller than the area of the third cross section 1403, the area of the third cross section 1403 is equal to or smaller than the area of the fourth cross section 1404, and the area of the fourth cross section 1404 is equal to or smaller than the area of the fifth cross section 1405.

According to the embodiment of the disclosure, blood flows to the fluid outlet through the fluid channel, the first continuous annular space, the second continuous annular space and the heat exchange cavity, the sectional area of the fluid channel is smaller than or equal to that of the first continuous annular space, the sectional area of the first continuous annular space is smaller than or equal to that of the second continuous annular space, the sectional area of the second continuous annular space is smaller than or equal to that of the heat exchange cavity, and the sectional area of the heat exchange cavity is smaller than or equal to that of the fluid outlet, so that the flow speed of the blood in the heat exchanger is gradually reduced, and turbulence is not easy to form.

In an embodiment of the present disclosure, as set forth above for fig. 4, oxygenator 400 includes: a heat exchanger; a fluid inlet assembly and exhaust assembly 204; a heat exchanger upper cover 201; an oxygenator housing 202; an oxygenation membrane filament chamber 402 is formed among the oxygenator lower cover 203, the oxygenator shell 202 and the heat exchanger shell 305 and is used for containing oxygenation membrane filaments, a fluid outlet 403 of the heat exchanger is communicated with the oxygenation membrane filament chamber, and the oxygenator lower cover 203 is a heat exchanger lower cover.

According to an embodiment of the present disclosure, by an oxygenator, comprising: a heat exchanger; a fluid inlet assembly and an exhaust assembly; a heat exchanger upper cover located below the fluid inlet assembly and the exhaust assembly; an oxygenator housing located below the heat exchanger upper cover; the oxygenator lower cover is positioned below the oxygenator shell, an oxygenation membrane wire cavity is formed between the oxygenator shell and the heat exchanger shell and used for containing the oxygenation membrane wire, a fluid outlet of the heat exchanger is communicated with the oxygenation membrane wire cavity, and the oxygenator lower cover is the heat exchanger lower cover, so that the heat exchanger and the oxygenator are integrally designed, miniaturization is facilitated, and the use is convenient.

In the embodiment of the present disclosure, as set forth in fig. 4, 6, 7 and 13, the oxygenating section combining edge 602 of the heat exchanger upper cover 201 and the outer edge of the heat medium sealing cover 301 are hermetically connected, and the oxygenator lower cover 203 comprises: the lower cover oxygenation section joint rim 702 is positioned between the central tube joint rim 703 of the oxygenator lower cover 203 and the outer edge 701 of the oxygenator lower cover, and is hermetically connected with the outer edge of the heat exchanger lower grate 304.

According to the embodiment of the disclosure, the oxygenator lower cover comprises a heat medium sealing cover and an oxygenator upper cover, wherein the oxygenator upper cover is provided with an oxygenating section combining edge which is hermetically connected with the outer edge of the heat medium sealing cover: the lower cover oxygenation section combining edge is positioned between the central pipe combining edge of the oxygenator lower cover and the outer edge of the oxygenator lower cover and is hermetically connected with the outer edge of the heat exchanger lower grate, so that the relative isolation between a heat exchange cavity of the heat exchanger and an oxygenation membrane silk cavity of the oxygenator is realized, and the reasonable function division of the heat exchange region and the oxygenation membrane silk region is realized.

In an embodiment of the present disclosure, as set forth above with respect to fig. 4, the heat exchanger upper cover 201 includes: a first oxygen channel 208 in communication with a first end of the oxygenating membrane filaments, the oxygenator lower cover 203 comprising: and the second oxygen channel 209 is communicated with the second end of the oxygenation membrane wire.

According to the embodiment of the present disclosure, the heat exchanger upper cover includes: a first oxygen channel in communication with a first end of the oxygenating membrane filaments, the oxygenator lower cover including: the second oxygen channel is communicated with the second end of the oxygenation membrane wire, so that a complete oxygen passage of the oxygenation section is realized.

In an embodiment of the present disclosure, as set forth above with respect to fig. 4, the oxygenator housing 202 includes: the blood flows out of the channel 207.

According to an embodiment of the present disclosure, with an oxygenator housing comprising: the blood flows out of the channel, thereby leading the blood out of the oxygenator.

In an embodiment of the present disclosure, the blood outflow channel 207 is located in an upper portion of the oxygenator housing 202, as previously set forth for fig. 4.

According to the embodiment of the disclosure, the blood outflow channel is positioned at the upper part of the oxygenator shell, so that the area in which blood and oxygen flow oppositely in the oxygenation membrane wire cavity is longer, and the oxygenation efficiency is improved.

The foregoing description is only exemplary of the preferred embodiments of the disclosure and is illustrative of the principles of the technology employed. It will be appreciated by those skilled in the art that the scope of the invention in the present disclosure is not limited to the specific combination of the above-mentioned features, but also encompasses other embodiments in which any combination of the above-mentioned features or their equivalents is possible without departing from the inventive concept. For example, the above features and (but not limited to) the features disclosed in this disclosure having similar functions are replaced with each other to form the technical solution.

Claims

1. A heat exchanger, comprising:

a heat exchanger housing;

a heat medium pipe bundle for accommodating a heat medium,

the heat medium pipe bundle is accommodated in the heat exchanger case at an intermediate position,

2. The heat exchanger of claim 1,

the heat medium pipeline bundle is of a hollow annular structure,

the heat exchanger further comprises:

the heat medium sealing cover comprises an isolating ring, the isolating ring forms an annular structure with an inner annular wall for sealing, the outer ring of the annular structure of the heat medium sealing cover is communicated with the upper end of the heat medium pipeline bundle,

the heat exchanger lower cover comprises a lower cover middle partition plate, and the two sides of the lower cover middle partition plate are respectively communicated with a first heating medium interface and a second heating medium interface.

3. The heat exchanger of claim 2, further comprising:

4. The heat exchanger of claim 3,

5. The heat exchanger of claim 2,

6. The heat exchanger of claim 5,

the upper part of the heat exchanger upper cover is connected with an exhaust assembly; and/or a fluid inlet assembly for the fluid,

the fluid inlet assembly includes: a fluid passage communicating with the central through hole of the heat exchanger upper cover and maintaining a certain angle with the central through hole of the heat exchanger upper cover,

7. The heat exchanger of claim 6,

8. The heat exchanger of claim 6, further comprising:

and the central pipe is positioned in the middle of the heat exchanger, penetrates through the isolating ring in the heat medium sealing cover and the central through hole of the heat exchanger upper cover, and is tightly connected with the exhaust assembly and/or the fluid inlet assembly and the heat exchanger lower cover.

9. The heat exchanger of claim 8,

10. The heat exchanger of claim 9,

the upper diameter of the central tube is smaller than the lower diameter,

11. The heat exchanger of claim 10,

the heat exchanger housing includes thereon: a fluid outlet.

12. The heat exchanger of claim 11,

fluid flows through the fluid passageway, the first continuous annular space, the second continuous annular space, the heat exchange cavity to the fluid outlet,

13. An oxygenator, comprising:

the heat exchanger of any one of claims 1-11;

a fluid inlet assembly and an exhaust assembly;

an oxygenator housing located below the heat exchanger upper cover;

an oxygenator lower cover located below the oxygenator housing,

the fluid outlet of the heat exchanger is communicated with the oxygenation membrane wire cavity,

the oxygenator lower cover is the heat exchanger lower cover.

14. The oxygenator of claim 13,

the combination edge of the oxygenation section of the upper cover of the heat exchanger is hermetically connected with the outer edge of the heat medium sealing cover,

15. The oxygenator of claim 14,

16. The oxygenator of claim 13,

the oxygenator housing includes: the blood flows out of the channel.

17. The oxygenator of claim 16,