Blood Pump

Abstract

The present application belongs to the technical field of medical equipment, and in particular, relates to a blood pump, which includes a shell assembly, an impeller, a stator assembly, a control assembly and a first heat sink. The shell assembly is provided with a first chamber, a second chamber and a partition separating the first chamber and the second chamber. The impeller is arranged in the first chamber, the stator assembly and the control assembly are both installed in the second chamber, and the stator assembly is electrically connected to the control assembly; the first heat sink includes a heat dissipation part and a conduction part, the heat dissipation part is located between the stator assembly and the control assembly, and is tightly pressed against the control assembly, the conduction part has a first end and a second end, the first end of the conduction part is connected to the heat dissipation part, and the second end of the conduction part is pressed against the partition, the heat generated by the control assembly is transferred to the conduction part through the heat dissipation part, the conduction part then transfers the heat to the partition, and the heat is then carried out of the shell assembly through the flowing blood, thereby achieving the effect of lowering the temperature of the blood pump, improving the heat dissipation efficiency of the blood pump, and avoiding blood cell damage.

Description

Technical Field

[0001] The present application belongs to the technical field of medical equipment, and in particular, relates to a blood pump. Background Art

[0002] Blood pumps are divided into implantable blood pumps and extracorporeal blood pumps. Implantable blood pumps are placed in the body, while extracorporeal blood pumps are used outside the body. The blood pump drives the impeller to generate centrifugal force to promote blood circulation through the driving part. The driving part generates heat during the working process, which will cause the temperature of the pump body to be higher during use. If the temperature of the blood pump is too high, it will cause damage to blood cells. Summary of the invention

[0003] The purpose of the present application is to provide a blood pump, aiming to solve the technical problem in the prior art that the blood pump has a high temperature during use, which may cause blood cell damage.

[0004] To achieve the above-mentioned purpose, the technical solution adopted in the present application is: a blood pump, including a shell assembly, an impeller, a stator assembly and a control assembly, the shell assembly is provided with a first chamber, a second chamber and a partition separating the first chamber and the second chamber, the impeller is arranged in the first chamber, the stator assembly and the control assembly are both installed in the second chamber, and the stator assembly is electrically connected to the control assembly; the blood pump also includes a first heat sink, the first heat sink includes a heat dissipation part and a conduction part, the heat dissipation part is located between the stator assembly and the control assembly, and is tightly pressed against the control assembly, the conduction part has a first end and a second end, the first end of the conduction part is connected to the heat dissipation part, and the second end of the conduction part is pressed against the partition.

[0005] Optionally, the control assembly includes a circuit board and electronic components arranged on the circuit board, and a first abutment protrusion is provided on a surface of the heat dissipation portion facing away from the stator assembly, and the first abutment protrusion abuts against the electronic components;

[0006] And / or, the first heat sink is made of copper, aluminum nitride, silicon carbide or silver;

[0007] And / or, a connecting hole is formed on the conducting part, and the blood pump further comprises a locking member, wherein the locking member is passed through the connecting hole and fixedly connected to the partition, so that the second end of the conducting part is tightly against the partition.

[0008] Optionally, the first heat sink also includes a mounting portion, which is fixedly connected to the heat dissipation portion, the mounting portion is passed through the stator assembly, and the mounting portion is provided with a mounting hole; the blood pump also includes a fastener, which is passed through the mounting hole and connected to the partition to fix the stator assembly to the second chamber.

[0009] Optionally, the end of the mounting portion facing away from the heat dissipation portion is provided with a plug-in hole connected to the mounting hole, the partition is provided with a plug-in column, the plug-in column is plugged into the plug-in hole, the plug-in column is tightly abutted against the hole wall of the plug-in hole, and the fastener is threadedly connected to the plug-in column.

[0010] Optionally, the plug-in hole has a circular hole portion and a square hole portion connected to the circular hole portion, the square hole portion is connected to the mounting hole, the plug-in column includes a cylindrical portion and a square column portion one end of which is fixedly connected to one end of the cylindrical portion, the end of the cylindrical portion away from the square column portion is fixedly connected to the partition, the cylindrical portion is accommodated in the circular hole portion, and the square column portion is accommodated in the square hole portion, the plug-in column is provided with a screw hole that cooperates with the fastener thread, and the screw hole extends from the end surface of the square column portion away from the cylindrical portion to the end of the cylindrical portion away from the square column portion.

[0011] Optionally, the first heat sink also includes a mounting portion, which is fixedly connected to the heat sink, and the mounting portion is passed through the stator assembly. The mounting portion is provided with a mounting hole and is connected to the partition to fix the stator assembly to the second chamber; the blood pump also includes an insulating member, which is sleeved on the mounting portion and located between the mounting portion and the stator assembly to insulate the mounting portion from the stator assembly.

[0012] Optionally, a positioning hole is provided on the heat dissipation portion, a positioning protrusion is provided on the insulating member, and the positioning protrusion is at least partially received in the positioning hole;

[0013] And / or, the insulating member is a square sleeve, the inner hole of the insulating member is a square hole, the stator assembly has a square accommodating hole, and a circle of square protrusions that are compatible with the insulating member and the accommodating hole are provided on the outer peripheral wall of the mounting portion, and the square protrusions are penetrated through the insulating member and the accommodating hole.

[0014] Optionally, the blood pump further comprises a second heat sink, which is disposed between the partition and the stator assembly and abuts against both the partition and the stator assembly.

[0015] Optionally, the stator assembly includes a back plate, a position detection assembly and a coil assembly, the position detection assembly includes a circuit board and a position sensor capable of obtaining the position of the impeller, the coil assembly includes an iron core, a coil and a pole shoe, one end of the iron core is fixedly connected to the back plate, the other end of the iron core is passed through the circuit board and connected to the pole shoe, the coil is wound outside the iron core and is located between the back plate and the circuit board; the position sensor is arranged on a surface of the circuit board away from the back plate;

[0016] The second heat sink has a first surface and a second surface that are arranged opposite to each other, the first surface abuts against the partition, a heat-conducting protrusion is arranged on the second surface, the heat-conducting protrusion abuts against the position sensor, an avoidance groove is also provided on the second surface, the pole shoe is located in the avoidance groove and abuts against the bottom surface of the avoidance groove, and a glue injection through hole is provided at the bottom of the avoidance groove;

[0017] And / or, the second heat sink is made of aluminum nitride, silicon carbide, carbon fiber, graphene or diamond.

[0018] Optionally, the stator assembly includes a back plate, a position detection assembly and a coil assembly, the position detection assembly includes a circuit board and a position sensor capable of obtaining the position of the impeller, the coil assembly includes an iron core, a coil and a pole shoe, one end of the iron core is fixedly connected to the back plate, the other end of the iron core is passed through the circuit board and connected to the pole shoe, the coil is wound outside the iron core and is located between the back plate and the circuit board; the position sensor is arranged on a surface of the circuit board away from the back plate;

[0019] The blood pump further comprises a third heat sink, which is installed between the position sensor and the pole shoe and abuts against both the position sensor and the pole shoe, and the outer peripheral edge of the heat sink abuts against the inner peripheral wall of the second chamber.

[0020] The above one or more technical solutions in the blood pump provided by the present application have at least one of the following technical effects: when in use, the stator assembly drives the impeller to rotate under the control of the control assembly, and the impeller rotates to generate centrifugal force to promote the flow of blood in the first chamber, thereby realizing blood circulation. At the same time, the heat generated by the control assembly is transferred to the conduction part through the heat dissipation part, and the conduction part transfers the heat to the partition. The heat on the partition is then carried out of the shell assembly through the flowing blood, thereby achieving the effect of lowering the temperature of the blood pump, improving the heat dissipation efficiency of the blood pump, and avoiding blood cell damage. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0022] Figure 1 A schematic structural diagram of a blood pump from a first perspective provided in an embodiment of the present application.

[0023] Figure 2 for Figure 1A schematic structural diagram of a blood pump from a second perspective is shown.

[0024] Figure 3 For along Figure 2 Sectional view along line AA.

[0025] Figure 4 for Figure 1 The blood pump shown is a schematic diagram of the structure after the upper shell, impeller and lower shell are hidden.

[0026] Figure 5 For along Figure 4 Sectional view along the midline BB.

[0027] Figure 6 for Figure 4 An exploded view of the blood pump is shown with the upper casing, impeller, and lower casing hidden.

[0028] Figure 7 for Figure 6 A structural schematic diagram of a first heat dissipation element from a first perspective is shown in FIG.

[0029] Figure 8 for Figure 6 A structural schematic diagram of the first heat dissipation element from a second perspective is shown in .

[0030] Fig. 9 for Figure 6 A schematic structural diagram of the middle shell from a second perspective shown in FIG.

[0031] Fig.10 for Figure 5 Schematic diagram of the structure of the insulating member shown in FIG.

[0032] Fig.11 A structural schematic diagram from a first perspective of another structural form of a first heat sink in a blood pump is provided for the embodiment of the present application.

[0033] Fig.12 for Fig.11 A structural schematic diagram of the first heat dissipation element from a second viewing angle is shown.

[0034] Fig.13 A schematic diagram of another structural form of the second heat sink of the blood pump provided in an embodiment of the present application.

[0035] Among them, the reference numerals in the figure are:

[0036] 10—housing assembly 11—first chamber 12—second chamber

[0037] 13 - partition 14 - upper shell 15 - middle shell

[0038] 16—lower shell 20—impeller 30—stator assembly

[0039] 31 - back plate 32 - position detection component 33 - coil component

[0040] 40—Control assembly 41—Circuit board 42—Electronic components

[0041] 50, 50"—first heat sink 51, 51"—heat dissipation portion 52, 52"—conduction portion

[0042] 53, 53"—mounting portion 60, 60"—second heat sink 61"—heat-conducting protrusion

[0043] 62"-avoidance groove 63"-glue injection hole 70-third heat sink

[0044] 81 - fastener 82 - insulator 131 - plug-in column

[0045] 141—inlet pipe 142—liquid outlet 161—electrical interface

[0046] 311 - Accommodation hole 321 - Circuit board 322 - Position sensor

[0047] 331—pole shoe 511—first abutting protrusion 512—plate-shaped body

[0048] 513—connecting strip 514—abutting piece 521—second abutting protrusion

[0049] 522—weight-reducing hole 523, 523″—connecting hole 524—third abutting protrusion

[0050] 525"—connecting section 526, 526"—bending section 531—installation hole

[0051] 532—plug hole 533—square protrusion 821—positioning protrusion

[0052] 1311—cylindrical part 1312—square column part 1313—screw hole

[0053] 5121—through hole 5122—positioning hole 5321—round hole

[0054] 5322—Square hole. DETAILED DESCRIPTION

[0055] The embodiments of the present application are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. Figures 1 to 13 The described embodiments are exemplary and are intended to be used to explain the present application, but should not be construed as limiting the present application.

[0056] In the description of the present application, it should be understood that the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0057] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of this application, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0058] In this application, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like 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 this application can be understood according to specific circumstances.

[0059] like Figures 1 to 13 As shown, in one embodiment of the present application, a blood pump is provided, including a housing assembly 10, an impeller 20, a stator assembly 30 and a control assembly 40, for details, see Figure 1 and Figure 2 As shown, the housing assembly 10 is provided with a first chamber 11, a second chamber 12 and a partition 13 separating the first chamber 11 and the second chamber 12, the impeller 20 is installed in the first chamber 11, the stator assembly 30 and the control assembly 40 are both installed in the second chamber 12, and the stator assembly 30 is electrically connected to the control assembly 40; for details, refer to Figure 3 and Figure 4 As shown, the blood pump also includes a first heat sink 50, which includes a heat dissipation portion 51 and a conduction portion 52. The heat dissipation portion 51 is located between the stator assembly 30 and the control assembly 40, and is tightly pressed against the control assembly 40. The conduction portion 52 has a first end and a second end. The first end of the conduction portion 52 is connected to the heat dissipation portion 51, and the second end of the conduction portion 52 is pressed against the partition 13.

[0060] Specifically, when the blood pump of the embodiment of the present application is in use, the stator assembly 30 drives the impeller 20 to rotate under the control of the control assembly 40, and the impeller 20 rotates to generate centrifugal force to promote the flow of blood in the first chamber 11, thereby realizing blood circulation. At the same time, the heat generated by the control assembly 40 is transferred to the conduction part 52 through the heat dissipation part 51, and the conduction part 52 transfers the heat to the partition 13. The heat on the partition 13 is then carried out of the shell assembly 10 through the flowing blood, thereby achieving the effect of lowering the temperature of the blood pump, improving the heat dissipation efficiency of the blood pump, and avoiding blood cell damage.

[0061] In this embodiment, see Figure 1 , Figure 2 and Figure 3 As shown, the housing assembly 10 includes an upper shell 14, a middle shell 15 and a lower shell 16. The upper shell 14 and the lower shell 16 are respectively buckled on opposite sides of the middle shell 15. The upper shell 14 and the middle shell 15 are arranged to form a first chamber 11, and the lower shell 16 and the middle shell 15 are arranged to form a second chamber 12. The partition 13 is a part of the middle shell 15 and separates the first chamber 11 and the second chamber 12. In one embodiment, the material of the upper shell 14, the material of the middle shell 15 and the material of the lower shell 16 are all titanium alloys.

[0062] In this embodiment, see Figure 1 , Figure 2 and Figure 3 As shown, the top of the upper shell 14 is provided with an inlet pipe 141 for blood to flow into the first chamber 11, and the upper shell 14 and the lower shell 15 are also surrounded by a liquid outlet 142 in the first chamber 11 for blood to flow out. The impeller 20 is rotatably arranged in the first chamber 11. The centrifugal force generated when the impeller 20 rotates enables blood to be sucked into the first chamber 11 from the inlet pipe 141 and then flow out from the liquid outlet 142, thereby realizing the blood pumping function and further realizing the circulation of blood. Specifically, the impeller 20 is suspended in the first chamber 11 when rotating, that is, the impeller 20 does not contact the cavity wall of the first chamber 11 when rotating, and is a non-contact rotation.

[0063] In this embodiment, see Figure 1 , Figure 2 and Figure 3 As shown, the impeller, the stator assembly 30 and the control assembly 40 are arranged in sequence along the rotation axis of the impeller 20, that is, the stator assembly 30 is located between the impeller and the control assembly 40. The heat dissipation portion 51 is located between the impeller 20 and the control assembly 40 and is in a plate shape. The conduction portion 52 is arranged perpendicular to the heat dissipation portion 51 and is located on the side of the stator assembly 30. This layout is convenient for component installation and has a good compact structure.

[0064] In this embodiment, the stator assembly 30 can generate a rotating magnetic field, thereby driving the impeller 20 to rotate. Figure 3 , Figure 4 and Figure 6 As shown, the stator assembly 30 includes a back plate 31, a position detection assembly 32 and a coil assembly 33. The position detection assembly 32 includes a circuit board 321 and a position sensor 322 capable of obtaining the position of the impeller 20. The back plate 31 and the circuit board 321 are respectively installed on opposite sides of the coil assembly 33, and the coil assembly 33 is clamped and fixed. The position sensor 322 is installed on the surface of the circuit board 321 facing away from the coil assembly 33. There are multiple coil assemblies 33, and each coil assembly 33 is circumferentially spaced around the central axis of the impeller 20. Each coil assembly 33 includes an iron core, a coil and a pole shoe 331. One end of the iron core is inserted through the circuit board 321 and connected to the pole shoe 331, and the other end of the iron core is fixedly connected to the back plate 31; the coil is wound outside the iron core and is located between the back plate 31 and the circuit board 321. Each coil is electrically connected to the control assembly 40, and the control assembly 40 controls the current size and direction of the coil. Specifically, the circuit board 321 is electrically connected to the circuit board 41 through a flexible board.

[0065] In one embodiment, the position sensor 322 is a Hall sensor for detecting the position and posture of the impeller 20 .

[0066] In this embodiment, see Figure 1 and Figure 2 As shown, the lower shell 16 is also provided with an electrical interface 161 electrically connected to the control assembly 40 to facilitate electrical connection with external components.

[0067] In this embodiment, see Figure 6 As shown, the control assembly 40 includes a circuit board 41 and electronic components 42, and the electronic components 42 are arranged on the surface of the circuit board 41 facing the heat dissipation portion 51. Specifically, the electronic components 42 are chips, and the side of the heat dissipation portion 51 away from the stator assembly 30 is pressed against the electronic components 42 of the control assembly 40 to conduct the heat of the electronic components 42 to the conduction portion 52.

[0068] In this embodiment, the material of the first heat sink 50 is a thermally conductive material with good thermal conductivity. Specifically, the material of the first heat sink 50 is copper, aluminum nitride, silicon carbide, silver, etc. The copper can be red copper, brass, etc., preferably red copper, because the thermal conductivity of red copper is better than that of brass, thereby greatly improving the heat conduction efficiency and increasing the heat dissipation efficiency. In this way, more heat will be transferred to the partition 13, and more heat will be carried away by the flowing blood, further improving the heat dissipation efficiency, lowering the temperature of the blood pump, and reducing the risk of blood cell damage.

[0069] In one embodiment, see Figure 4 and Figure 5As shown, the heat dissipation portion 51 of the provided blood pump is provided with a first abutting protrusion 511 on the surface facing away from the stator assembly 30, and the first abutting protrusion 511 abuts against the electronic component 42 of the control assembly 40. Specifically, when in use, the first abutting protrusion 511 abuts against the electronic component 42 of the control assembly 40, so that the heat dissipation portion 51 is separated from the circuit board 41, thereby preventing the heat dissipation portion 51 from contacting the circuit board 41 and causing a short circuit.

[0070] In one embodiment, see Figure 5 , Figure 7 and Figure 8 As shown, the side surface of the second end of the conducting part 52 of the provided blood pump is provided with a second abutting protrusion 521, and the side surface of the second abutting protrusion 521 close to the partition 13 is flush with the end surface of the second end of the conducting part 52. Specifically, the second abutting protrusion 521 and the end surface of the second end of the conducting part 52 abut on the partition 13 at the same time, so that the contact area between the first heat sink 50 and the partition 13 is large, and the heat transfer effect is good, so that more heat will be transferred to the partition 13, and more heat will be taken away by the flowing blood, further, the heat dissipation efficiency is improved, the temperature of the blood pump is reduced, and the risk of blood cell damage is reduced.

[0071] Specifically, a third abutting protrusion 524 is further provided on the end surface of the second end of the conducting portion 52 , and the third abutting protrusion 524 abuts against the partition plate 13 .

[0072] In one embodiment, see Figure 3 and Figure 5 As shown, the first heat sink 50 of the blood pump provided also includes a mounting portion 53, which is fixedly connected to the heat dissipation portion 51. The mounting portion 53 passes through the stator assembly 30 and is fixedly connected to the partition 13 to fix the stator assembly 30 to the second chamber 12.

[0073] In one embodiment, see Figure 3 and Figure 5 As shown, the provided blood pump further includes a fastener 81, the mounting portion 53 is provided with a mounting hole 531, the fastener 81 is passed through the mounting hole 531, and is connected to the partition 13. Specifically, the fastener 81 directly passes through the mounting hole 531 on the mounting portion 53, and is connected to the partition 13, so as to fix the stator assembly 30 on the partition 13, and the installation operation is simple. In this way, the first heat sink 50 not only has a heat conduction function, but also can fix the stator assembly 30, and the structure is compact. The fastener 81 can be connected to the partition 13 by screw connection, welding, clamping, etc.

[0074] In one embodiment, see Figure 3 and Figure 4As shown, the end of the mounting portion 53 of the provided blood pump facing away from the heat dissipation portion 51 is provided with a plug hole 532 connected to the mounting hole 531, and a plug post 131 is provided on the partition 13. The plug post 131 is at least partially accommodated in the plug hole 532, and the plug post 131 is tightly abutted against the hole wall of the plug hole 532, and the fastener 81 is screwed with the plug post 131. Specifically, the plug post 131 is inserted into the plug hole 532, so that the outer peripheral wall of the plug post 131 abuts against the inner peripheral wall of the plug hole 532, thereby greatly increasing the contact area between the two, improving the heat conduction efficiency, and then increasing the heat dissipation efficiency, reducing the temperature of the blood pump, and reducing the risk of blood cell damage.

[0075] Specifically, see Figure 5 , Figure 7 and Fig. 9 As shown, the plug-in hole 532 has a circular hole portion 5321 and a square hole portion 5322 connected to the circular hole portion 5321, the square hole portion 5322 is connected to the mounting hole 531, the plug-in column 131 includes a cylindrical portion 1311 and a square column portion 1312 one end of which is fixedly connected to one end of the cylindrical portion 1311, the end of the cylindrical portion 1311 away from the square column portion 1312 is fixedly connected to the partition 13, the cylindrical portion 1311 is accommodated in the plug-in hole 532, the square column portion 1312 is accommodated in the square hole portion 5322, the plug-in column 131 is provided with a screw hole 1313 threadedly matched with the fastener 81, the screw hole 1313 extends from the end surface of the square column portion 1312 away from the cylindrical portion 1311 to the end of the cylindrical portion 1311 away from the square column portion 1312, thereby preventing the first heat sink 50 from rotating relative to the partition 13.

[0076] Further, see Figure 5 and Figure 7 As shown, the mounting portion 53 is cylindrical, and the mounting portion 53 is arranged perpendicular to the heat dissipation portion 51. The mounting hole 531 passes through the mounting portion 53 along the axis of the mounting portion 53. The heat dissipation portion 51 is provided with a through hole 5121 that passes through the heat dissipation portion 51, and the through hole 5121 is connected to the mounting hole 53, so that the fastener 81 can be inserted from the bottom of the heat dissipation portion 51, and then pass through the mounting portion 53 and then be screwed with the plug-in column 131; specifically, the cross-section of the end of the plug-in column 131 is a quadrilateral, and the cross-section of the plug-in hole 532 is a quadrilateral. When the end of the plug-in portion is inserted into the plug-in hole 532, the mounting portion 53 and the plug-in column 131 cannot rotate relative to each other, thereby realizing the circumferential fixation of the first heat dissipation component 50 and the stator assembly 30 in the second chamber 12.

[0077] For further information, see Figure 5 and Figure 7As shown, the heat dissipation part 51 includes a plate-like body 512, a connecting strip 513 and an abutting piece 514. The plate-like body 512 is fixedly connected to the mounting part 53. The width of the plate-like body 512 is smaller than the width of the circuit board 41. One end of the connecting strip 513 and the abutting piece 514 are respectively fixedly connected to the opposite sides of the plate-like body 512. The other end of the connecting strip 513 is connected to the first end of the conducting part 52. The first abutting protrusion 511 is arranged on the abutting piece 514. In this way, the heat dissipation part 51 will not cover the entire control component 40, and the overall area is small, which can reduce the generation of eddy current. The conducting part 52 is provided with a weight-reducing hole 522, thereby effectively reducing the weight of the entire blood pump, reducing material accumulation, and reducing the manufacturing cost. Of course, in other embodiments, the heat dissipation part 51 can also be other structural forms, which can be designed according to actual structural needs, reduce the area of ​​the heat dissipation part 51 as much as possible, and minimize the generation of eddy current.

[0078] Furthermore, the material of the fastener 81 is copper, such as red copper, brass, etc., preferably brass. Although the thermal conductivity of red copper is better than that of brass, brass has better wear resistance and mechanical properties, so the fastener 81 made of brass can not only have the function of heat transfer, but also can stably connect the stator assembly 30 and the first heat sink 50 as well as the conduction part 52 and the partition 13 together. The connection is stable and reliable, and the use of the blood pump is stable, reliable and durable.

[0079] Preferably, the fastener 81 is a screw, a bolt and a bolt.

[0080] For further information, see Figure 5 As shown, the through hole 5121 is disposed on the surface of the plate-like body 512 facing away from the mounting portion 53, and the head of the fastener 81 is received in the through hole 5121, so that the structure of the entire blood pump is more compact.

[0081] In one embodiment, see Figure 5 and Figure 7 As shown, the provided blood pump further includes an insulating member 82, which is sleeved on the mounting portion 53 and located between the mounting portion 53 and the stator assembly 30. The insulating member 82 electrically separates the stator assembly 30 from the mounting portion 53, thereby insulating the stator assembly 30 from the mounting portion 53.

[0082] Specifically, see Figure 5 As shown, the insulating member 82 is sleeved on the mounting portion 53, and the back plate 31 is provided with a receiving hole 822, and the insulating member 82 is partially received in the receiving hole 822. If the first heat sink 50 is a heat conductive material that can conduct electricity, the mounting portion 53 can conduct electricity, and the back plate 31 is generally a silicon steel sheet that can also conduct electricity. The installation of the insulating member 82 can insulate the mounting portion 53 from the back plate 31.

[0083] Specifically, see Figure 6 , Figure 7 and Fig.10 As shown, a positioning hole 5122 is provided on the heat dissipation portion 51, and a positioning protrusion 821 is provided on the insulating member 82. The positioning protrusion 821 is at least partially received in the positioning hole 5122, thereby realizing the positioning of the insulating member 82. Specifically, the positioning protrusion 821 is located on the end surface of the insulating member 82 facing the heat dissipation portion 51, and the positioning hole 5122 is located on the plate-like body 512, and the positioning protrusion 821 is inserted into the positioning hole 5122. More specifically, there are multiple positioning holes 5122, and the multiple positioning holes 5122 are arranged around the mounting portion 53, and there are correspondingly multiple positioning protrusions 821.

[0084] Among them, the insulating part 82 is a square sleeve, the inner hole of the insulating part 82 is a square hole, the accommodating hole 822 is also a square hole, and a circle of square protrusions 533 that are compatible with the inner hole of the insulating part 82 are provided on the outer peripheral wall of the mounting portion 53. The square protrusions 533 are inserted into the inner hole of the insulating part 82, and the square sleeve is inserted into the accommodating hole 822. Through such a structural design, the circumferential fixation of the insulating part 82, the back plate 31 and the mounting portion 53 can be achieved.

[0085] Furthermore, an insulating film is also provided on the surface of the back plate 31 away from the coil assembly 33 to insulate the back plate 31 and the heat dissipation portion 51. It can be understood that the insulation between the back plate 31 and the heat dissipation portion 51 is not limited to the form of an insulating film, and the insulating member 82 can also be provided with an annular body and a flange provided at one end of the annular body, and the flange is clamped between the back plate 31 and the heat dissipation portion 51, so that the back plate 31 and the mounting portion 53 are insulated.

[0086] In one embodiment, see Figure 5 As shown, the provided blood pump further includes a second heat sink 60, which is disposed between the partition 13 and the stator assembly 30 and abuts against both the partition 13 and the stator assembly 30. By disposing the second heat sink 60 between the partition 13 and the stator assembly 30, the heat of the stator assembly 30 can be conducted to the partition 13 through the second heat sink 60, so that the heat is taken away by the flowing blood, the heat dissipation efficiency is increased, and further, the temperature of the blood pump is reduced to avoid damage to blood cells.

[0087] Furthermore, the second heat sink 60 is roughly annular, and the material of the second heat sink 60 is a non-metallic material with good thermal conductivity. In order to avoid the leakage problem of metal thermal conductive materials, the second heat sink 60 is a non-metallic material. The material of the second heat sink 60 is aluminum nitride, silicon carbide, carbon fiber, graphene, diamond, etc.

[0088] In one embodiment, see Figure 5 and Figure 6As shown, the provided blood pump also includes a third heat sink 70, which is installed between the position sensor 322 on the stator assembly 30 and the pole shoe 331 on the stator assembly 30, and the outer peripheral edge of the third heat sink 70 abuts against the cavity wall of the second chamber 12 close to the partition 13. Specifically, the third heat sink 70 is arranged between the position sensor 322 and the pole shoe 331 on the stator assembly 30, and the outer periphery of the third heat sink 70 abuts against the cavity wall of the second chamber 12 near the partition 13, so as to conduct the heat of the position detection component 32 and the pole shoe 331 to the partition 13, and then be carried out of the blood pump by the flowing blood, thereby reducing the temperature of the blood pump; specifically, the outer periphery of the third heat sink 70 abuts against the inner periphery of the middle shell 15, and the heat of the position detection component 32 and the pole shoe 331 is conducted to the middle shell 15, and then be carried out of the blood pump by the flowing blood, thereby reducing the temperature of the blood pump; more specifically, the iron core is penetrated through the circuit board 321 and the third heat sink 70, and the pole shoe 331 is connected to the end of the iron core away from the back plate 31; the third heat sink 70 is clamped and fixed between the position sensor 322 and the pole shoe 331.

[0089] Furthermore, the material of the third heat sink 70 is a non-metallic material with good thermal conductivity. Since metal thermal conductive materials have leakage problems, the third heat sink 70 is made of non-metallic materials. The material of the third heat sink 70 is aluminum nitride, silicon carbide, carbon fiber, graphene, diamond, etc. It should be noted that the third heat sink 70 can be omitted, that is, the third heat sink 70 can be omitted; the second heat sink 60 can also be omitted, that is, the second heat sink 60 can be omitted; or, both the second heat sink 60 and the third heat sink 70 can be omitted.

[0090] It should be noted that the first heat sink 50 is not limited to the above structure. Fig.11 and Fig.12 Another structure of the first heat sink 50" is provided. The first heat sink 50" also has a heat sink 51", a conduction portion 52" and a mounting portion 53", but the configurations of the various portions are different. In addition, Figure 8 and Fig. 9 A connecting hole 523'' is provided on the conducting part 52'' of the first heat sink 50''. At this time, the blood pump also includes a locking member, which passes through the connecting hole 523'' and is fixedly connected to the partition 13, so that the conducting part 52'' is tightly against the partition 13, thereby ensuring that the heat can be stably transferred to the partition 13 and then carried away by the flowing blood. On the other hand, it can also avoid the separation of the conducting part 52'' and the partition 13 due to thermal expansion and contraction, thereby preventing the problem of heat transfer interruption, reducing the risk of temperature increase in the blood pump, and reducing the risk of blood cell damage.

[0091] The material of the locking piece is copper, such as red copper, brass, etc., preferably brass. Although red copper has better thermal conductivity than brass, brass has better wear resistance and mechanical properties, so the locking piece made of brass can not only have the function of heat transfer, but also can stably and tightly contact the conducting part 52" and the partition 13.

[0092] Specifically, the conducting portion 52" includes a connecting section 525" and a bending section 526" extending and bending from one end of the connecting section 525", and one end of the connecting section 525" away from the bending section is fixedly connected to the heat dissipation portion 51", and the connecting hole 523" is located on the bending section. The locking member passes through the connecting hole 523" and is fixedly connected to the partition 13, so that the bending section 526" is tightly abutted against the partition 13. More specifically, a third abutting protrusion 524" is provided on the bending section 525", and the third abutting protrusion 524" is tightly abutted against the partition 13. Specifically in the illustrated embodiment, there are two third abutting protrusions 524", which are arranged at intervals, and the connecting hole 523" is located between the two third abutting protrusions 524".

[0093] It is understandable that the conducting part 52 in the first heat dissipating member 50 may also adopt the connecting hole 523″ and the locking member, so that the conducting part 52 is tightly abutted against the partition 13.

[0094] It should be noted that the second heat sink 60 is not limited to the above structure. Fig.13 Another structure of the second heat sink 60" is provided in the invention. The second heat sink 60" has a first surface and a second surface which are arranged opposite to each other. The first surface is in contact with the partition 13. A heat-conducting protrusion 61" is arranged on the second surface. The heat-conducting protrusion 61" is pressed against the position sensor 322 on the stator assembly 30. An avoidance groove 62" is also provided on the second surface. The pole shoe 331 of the stator assembly 30 is located in the avoidance groove 62" and is pressed against the bottom surface of the avoidance groove 62". The bottom surface of the avoidance groove 62" is provided with a glue injection through hole 63 ". Specifically, the second heat sink 60" is located between the pole shoe 331 and the partition 13, so that the heat on the pole shoe 331 and the position sensor 322 can be transferred to the partition 13 through the second heat sink 60", and then carried out of the blood pump by the flowing blood, thereby reducing the temperature of the blood pump; in addition, glue is injected into the glue injection through hole 63", so as to facilitate the bonding and fixing of the pole shoe 331 and the second heat sink 60". At the same time, the second heat sink 60" is fixed by clamping the pole shoe 331 and the partition 13, and its fixation is more stable and reliable.

[0095] If the second heat sink 60" is used, there is no need to set the third heat sink 70. The above is only a preferred embodiment of the present application and is not intended to limit the present application. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present application should be included in the protection scope of the present application.

Claims

1. A blood pump, characterized in that: The invention comprises a housing component, an impeller, a stator component and a control component, wherein the housing component is provided with a first chamber, a second chamber and a partition separating the first chamber and the second chamber, the impeller is arranged in the first chamber, the stator component and the control component are both installed in the second chamber, and the stator component is electrically connected to the control component; The blood pump also includes a first heat sink, which includes a heat sink and a conduction portion. The heat sink is located between the stator assembly and the control assembly and is pressed against the control assembly. The conduction portion has a first end and a second end. The first end of the conduction portion is connected to the heat sink, and the second end of the conduction portion is pressed against the partition. The conduction portion is located between the stator assembly and the side wall of the second chamber. The first heat sink also includes a mounting portion, which is fixedly connected to the heat sink, and the mounting portion is passed through the stator assembly; the mounting portion is provided with a mounting hole. The blood pump also includes a fastener, which is passed through the mounting hole and connected to the partition to fix the stator assembly to the second chamber.

2. The blood pump according to claim 1, characterized in that: The control assembly includes a circuit board and electronic components arranged on the circuit board, and a first abutting protrusion is provided on a surface of the heat dissipation portion facing away from the stator assembly, and the first abutting protrusion abuts against the electronic components; And / or, the first heat sink is made of copper, aluminum nitride, silicon carbide or silver; And / or, a connecting hole is formed on the conducting part, and the blood pump further comprises a locking member, wherein the locking member is passed through the connecting hole and fixedly connected to the partition, so that the second end of the conducting part is tightly against the partition.

3. The blood pump according to claim 1, characterized in that: The control assembly includes a circuit board and electronic components arranged on the circuit board. The surface of the heat dissipation portion facing away from the stator assembly is provided with a first abutment protrusion, and the first abutment protrusion is tightly pressed against the electronic components; the heat dissipation portion includes a plate-like body, a connecting strip and an abutment sheet. The plate-like body is fixedly connected to the mounting portion, and the width of the plate-like body is smaller than the width of the circuit board. One end of the connecting strip and the abutment sheet are respectively fixedly connected to opposite sides of the plate-like body, and the other end of the connecting strip is connected to the first end of the conducting portion. The first abutment protrusion is arranged on the abutment sheet.

4. The blood pump according to claim 1, characterized in that: The end of the mounting portion facing away from the heat dissipation portion is provided with a plug hole connected to the mounting hole, the partition is provided with a plug column, the plug column is plugged into the plug hole, the plug column is tightly abutted against the hole wall of the plug hole, and the fastener is screwed to the plug column.

5. The blood pump according to claim 4, characterized in that: The plug-in hole comprises a circular hole portion and a square hole portion connected to the circular hole portion, the square hole portion is connected to the mounting hole, the plug-in column comprises a cylindrical portion and a square column portion one end of which is fixedly connected to one end of the cylindrical portion, the end of the cylindrical portion away from the square column portion is fixedly connected to the partition, the cylindrical portion is accommodated in the circular hole portion, the square column portion is accommodated in the square hole portion, the plug-in column is provided with a screw hole which is threadedly matched with the fastener, and the screw hole extends from the end surface of the square column portion away from the cylindrical portion to the end of the cylindrical portion away from the square column portion.

6. The blood pump according to claim 1, characterized in that: The blood pump further includes an insulating member, which is sleeved on the mounting portion and located between the mounting portion and the stator assembly to insulate the mounting portion from the stator assembly.

7. The blood pump according to claim 6, characterized in that: A positioning hole is formed on the heat dissipation portion, a positioning protrusion is formed on the insulating member, and the positioning protrusion is at least partially received in the positioning hole; And / or, the insulating member is a square sleeve, the inner hole of the insulating member is a square hole, the stator assembly has a square accommodating hole, and a circle of square protrusions that are compatible with the insulating member and the accommodating hole are provided on the outer peripheral wall of the mounting portion, and the square protrusions are penetrated through the insulating member and the accommodating hole.

8. The blood pump according to claim 1, characterized in that: The blood pump further comprises a second heat sink, which is disposed between the partition and the stator assembly and abuts against both the partition and the stator assembly.

9. The blood pump according to claim 8, characterized in that: The stator assembly includes a back plate, a position detection assembly and a coil assembly. The position detection assembly includes a circuit board and a position sensor capable of obtaining the position of the impeller. The coil assembly includes an iron core, a coil and a pole shoe. One end of the iron core is fixedly connected to the back plate, and the other end of the iron core is passed through the circuit board and connected to the pole shoe. The coil is wound outside the iron core and is located between the back plate and the circuit board. The position sensor is arranged on a surface of the circuit board away from the back plate. The second heat sink has a first surface and a second surface that are arranged opposite to each other, the first surface abuts against the partition, a heat-conducting protrusion is arranged on the second surface, the heat-conducting protrusion abuts against the position sensor, an avoidance groove is also provided on the second surface, the pole shoe is located in the avoidance groove and abuts against the bottom surface of the avoidance groove, and a glue injection through hole is provided at the bottom of the avoidance groove; And / or, the second heat sink is made of aluminum nitride, silicon carbide, carbon fiber, graphene or diamond.

10. The blood pump according to any one of claims 1 to 8, characterized in that: The stator assembly includes a back plate, a position detection assembly and a coil assembly. The position detection assembly includes a circuit board and a position sensor capable of obtaining the position of the impeller. The coil assembly includes an iron core, a coil and a pole shoe. One end of the iron core is fixedly connected to the back plate, and the other end of the iron core is passed through the circuit board and connected to the pole shoe. The coil is wound outside the iron core and is located between the back plate and the circuit board. The position sensor is arranged on a surface of the circuit board away from the back plate. The blood pump further comprises a third heat sink, which is installed between the position sensor and the pole shoe and abuts against both the position sensor and the pole shoe, and the outer peripheral edge of the heat sink abuts against the cavity wall of the second chamber.

Images