CN208660018U - A kind of Minitype centrifugal blood pump of anti-haemocyte damage - Google Patents
A kind of Minitype centrifugal blood pump of anti-haemocyte damage Download PDFInfo
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- CN208660018U CN208660018U CN201720465695.XU CN201720465695U CN208660018U CN 208660018 U CN208660018 U CN 208660018U CN 201720465695 U CN201720465695 U CN 201720465695U CN 208660018 U CN208660018 U CN 208660018U
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- 239000008280 blood Substances 0.000 title claims abstract description 42
- 210000004369 blood Anatomy 0.000 title claims abstract description 42
- 230000006378 damage Effects 0.000 title claims abstract description 13
- 239000010410 layer Substances 0.000 abstract description 13
- 239000012530 fluid Substances 0.000 abstract description 7
- 239000011229 interlayer Substances 0.000 abstract description 2
- 238000009826 distribution Methods 0.000 description 8
- 238000010586 diagram Methods 0.000 description 4
- 238000010008 shearing Methods 0.000 description 3
- 238000013461 design Methods 0.000 description 2
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- 238000000034 method Methods 0.000 description 2
- 238000011160 research Methods 0.000 description 2
- 240000008574 Capsicum frutescens Species 0.000 description 1
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- 230000006399 behavior Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000036770 blood supply Effects 0.000 description 1
- 230000009172 bursting Effects 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 239000012141 concentrate Substances 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 239000003814 drug Substances 0.000 description 1
- 229940079593 drug Drugs 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
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- 230000008676 import Effects 0.000 description 1
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- 238000012544 monitoring process Methods 0.000 description 1
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- 238000005381 potential energy Methods 0.000 description 1
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- 238000005086 pumping Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
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Abstract
The utility model discloses a kind of Minitype centrifugal blood pumps of anti-haemocyte damage.The prior art can not control boundary layer thickness, Secondary Flow and eddy current crack in miniature blood centrifugal pump very well.Blade suction surface leading edge on the utility model impeller is equipped with the two suction surface concave point groups arranged along vane type line spacing, and blade pressure surface leading edge is equipped with the three pressure face concave point groups arranged along vane type line spacing；Front hub is located at the outlet end impeller Ye Dao equipped with front hub winglet, rear-wheel hub be located at the outlet end impeller Ye Dao set there are two rear-wheel hub winglet.Two suction surface concave point groups of the utility model and three pressure face concave point groups cause the variation of local edge interlayer, enable tough blood to be detached from blade surface, reduce boundary layer thickness；Front hub winglet and two rear-wheel hub winglets control fluid Radial Flow, reduce jet stream Trailing Edge Loss and eddy current crack.
Description
Technical field
The utility model belongs to miniature pump technical field, is related to efficient one kind, low noise, to the miniature of the low damage of haemocyte
Micro-centrifugal blood pump, in particular to blade inlet edge have round and smooth concave point and impeller front and back wheel hub to have the Minitype centrifugal blood pump of winglet.
Background technique
Pump is a kind of very widely used universal machine, plays huge effect in the production, life of the mankind, no
It is constantly manufactured and is applied among various industries also with new application needs with the pump of type and various sizes.According to
Pump can be generally divided into following a few classes: conventional pumps, microminiature pump and micropump by the difference of characteristic dimension.Wherein microminiature
Characteristic dimension range substantially 1~50mm of pump, and the characteristic length of micropump and conventional pumps be respectively 1mm or less and 50mm with
On.
The development of micropump starts from 1970s, along with the hair of " microelectromechanical systems " and " micro-flow system "
Exhibition, the research of micropump are pushed.The performer important as micro-flow system, it is micro- that micropump is widely used in liquid gas
Measure dispensing, flowing control, chemical analysis, environmental monitoring, it is micro injection and drug transmit, integrated circuit it is chilly but, microminiature
Propulsion of satellite etc..Microminiature pump is because its special size range shows its good application prospect, such as microminiature electricity
Machine and cooling system comprising the electronic equipment including computer CPU, pipeline pump, the temperature control system of fuel cell and existing
In most widely used Medical Devices etc..
In view of blood has the characteristic that haemocyte is easily rupturable in biggish viscosity and blood transportation, how to design flowing and cut
The micro centrifugal pump that shear force is low, internal flow is stable is most important.But other than the particularity of conveying liquid, micro centrifugal pump
Middle flowing is extremely complex, is mainly reflected in: 1) flowing is three-dimensionality；2) viscosity of fluid；3) non-stationarity flowed.Because defeated
Blood is transported in viscosity and the particularity for transporting requirement, it is to meet Ku Ta-Ru Kefusi that viscosity, which not only influences exit edge of blade,
Base condition and the blade wake passing vortex formed.Due to viscosity, blade surface and ring wall channel surface can have viscous boundary
Layer has strong interaction between them and between mainstream, generate so-called " Secondary Flow " phenomenon.Secondary flow is micro-
Type is centrifuged the main contributor that pumping loss rises, efficiency declines.Meanwhile Secondary Flow and vortex bursting are the masters that noise is generated in centrifugal pump
Want source.
In conclusion going out efficient one kind, low noise to design optimization, to the Minitype centrifugal blood of the low damage of haemocyte
Pump seeks to control and reduce secondary flow, control and reduces boundary layer thickness, prevents vortex shedding or control the formation in whirlpool.
Summary of the invention
The purpose of this utility model is the boundary thickness that can not be controlled very well in miniature blood centrifugal pump for the prior art
The problem of degree, Secondary Flow and eddy current crack, providing blade inlet edge has wheel hub before and after round and smooth concave point and impeller to have the miniature of winglet
Micro-centrifugal blood pump, round and smooth concave point weaken the wall shear stress distribution of edge before the impeller, control the Secondary Flow of radial motion, control leaf
Piece surface boundary layer thickness；To there are the exits of the impeller channel of larger flow instability to add winglet, impeller can be improved
The flow condition at place inhibits the vortex structure in the exit Ye Dao to generate, reduces eddy current crack caused by blade wake passing；By to micro-
The improvement of type centrifugal pump impeller part different location keeps type centrifugal pump flowing shear stress lower, and operational efficiency is higher, noise
It is lower.
The utility model includes drive end bearing bracket, rear end cap and impeller；Impeller and drive end bearing bracket, rear end cap are coaxial, are driven by motor.
Blade suction surface leading edge on impeller is equipped with the two suction surface concave point groups arranged along vane type line spacing b2, and b2 is
Blade along molded line direction height mean value 15%~18%；The suction surface concave point group includes along flat with blade inlet edge inclination angle
Five suction surface concave points of capable straight line arrangement；Blade inlet edge inclination angle is 20 °~30 °；Blade inlet edge is recessed to any one suction surface
The distance of point is all in 5%~15% range of vane type line length；The hemispherical of suction surface concave point diametrically D, D value are leaf
The 5%~10% of piece average thickness；The center of adjacent suction face concave point is away from being blade along molded line direction in suction surface concave point group
The 14%~16% of height mean value, the suction surface concave point centre bit from middle position in the closer suction surface concave point group of blade inlet edge
In the half height and position of blade height mean value along molded line direction；From interposition in the farther away suction surface concave point group of blade inlet edge
The suction surface concave point centre-height set is than in the suction surface concave point from middle position in the closer suction surface concave point group of blade inlet edge
Heart height is high, difference be blade along molded line direction height mean value 10%~14%.
Blade pressure surface leading edge on impeller is equipped with the three pressure face concave point groups arranged along vane type line spacing, before blade
The spacing of edge and the pressure face concave point group nearest from blade inlet edge be blade along molded line direction height mean value 4%~6%, from
The spacing of the nearest pressure face concave point group of blade inlet edge and intermediate pressure face concave point group is blade height mean value along molded line direction
14%~16%, the spacing of intermediate pressure face concave point group and the pressure face concave point group farthest from blade inlet edge is blade along molded line
The 9%~11% of height mean value on direction；The pressure face concave point group includes along the straight line cloth parallel with blade inlet edge inclination angle
The five pressure face concave points set；Blade inlet edge to any one pressure face concave point distance all vane type line length 5%~
In 30% range；The hemispherical of pressure face concave point diametrically D；The center of adjacent pressure face concave point is away from for leaf in pressure face concave point group
Piece along molded line direction height mean value 14%~16%；The pressure face concave point centre bit in middle position in each pressure face concave point group
In 45% height and position of blade height mean value along molded line direction.
Front hub is located at the outlet end impeller Ye Dao equipped with front hub winglet, and rear-wheel hub is located at the outlet end impeller Ye Dao equipped with two
A rear-wheel hub winglet；The outlet end Ye Dao camber line is divided into bisection, the trailing edge of two rear-wheel hub winglets by the trailing edge of front hub winglet
The outlet end Ye Dao camber line is divided into trisection；The thickness of front hub winglet and rear-wheel hub winglet be vane thickness 20%~
30%；The angle of outlet of front hub winglet and rear-wheel hub winglet is equal with outlet blade angle；The leading edge and impeller shaft of front hub winglet
The angle of line is 10 °~40 °, and the angle of the small nose of wing of rear-wheel hub and impeller axis is 7 °~30 °；The molded line of front hub winglet is long
Degree is the 10% of vane type line length, and the molded line length of rear-wheel hub winglet is the 15% of vane type line length, front hub winglet and
The height of rear-wheel hub winglet is H, H value be blade along molded line direction height mean value 5%~10%.
Gasket is set between the drive end bearing bracket and rear end cap, and drive end bearing bracket and rear end cap are bolted.
5~8 blades being evenly distributed are shared on the impeller.
The utility model has the beneficial effects that
1, the utility model is provided with the concave point to smoothly transit by the leading edge in impeller blade suction surface, can change viscosity
Biggish blood suction surface blade inlet edge energy loss on suction surface of boundary layer thickness and blood, before reducing suction surface
The wall shear stress of edge, so that the haemocyte on suction surface in blood will not be damaged because of biggish boundary shear stress.It is right
In the pressure face for directly having impact with blood, the utility model is provided with light in the region that blade pressure surface boundary shear stress is concentrated
The concave point crossed is slipped over, the flow condition on pressure face can be improved and improves boundary layer thickness, correspondence reduces on pressure face
Boundary shear stress improves flow condition of the blood in impeller to reduce flow losses.Meanwhile pressure face upper wall surface is sheared
The reduction of power also ensures the integrality of haemocyte in blood, avoids because haemocyte is made in the up-front high shear of impeller blade
At destruction.
2, for high-revolving centrifugal pump the outlet end Ye Dao " jet-wake " easy to form the phenomenon that, and in Ye Dao
There are the flow behaviors of vortex structure for upper and lower surface, are provided with upper and lower surface winglet, can control the pressure due to fluid well
With centrifugal force it is uneven caused by Radial Flow, while the size in a pair of channels whirlpool in blade passage can also be controlled, also just controlled
The Secondary Flow for having made radial motion reduces the uneven of speed, reduces jet stream Trailing Edge Loss, it is suppressed that the vortex strength of leaf road tail end
Degree and flow loss simultaneously control vortex shedding.Meanwhile the winglet for being evenly arranged on upper and lower surface can effectively control the biggish blood of viscosity
The shedding frequence of the boundary layer thickness of bottom surface and whirlpool on leaf road, the structure can cut big Passage Vortex, be combed
At countless small vortex, and the viscous fluid in runner is effectively separated, is oriented to, caused to become ideal flow state, reduce
The Trailing Edge Loss and eddy current crack of centrifugal pump.
Detailed description of the invention
Fig. 1 is the overall structure stereogram of the utility model；
Fig. 2 is the structural perspective of impeller in the utility model；
Fig. 3 is the up-front suction surface concave point distribution schematic diagram of impeller blade suction surface in the utility model；
Fig. 4 is the up-front pressure face concave point distribution schematic diagram of impeller blade pressure face in the utility model；
Fig. 5 is the forward and backward wheel hub winglet circumferential position figure of the utility model；
Fig. 6 is the front hub winglet structural schematic diagram of the utility model；
Fig. 7 is the rear-wheel hub winglet structural schematic diagram of the utility model.
Specific embodiment
The utility model is described in further detail with reference to the accompanying drawings and embodiments.
As shown in Figure 1, a kind of Minitype centrifugal blood pump of anti-haemocyte damage, including drive end bearing bracket 1, rear end cap 2 and impeller
3；Gasket 4 is set between drive end bearing bracket 1, rear end cap 2, and drive end bearing bracket 1 and rear end cap 2 are bolted；Impeller 3 and drive end bearing bracket 1,
Rear end cap 2 is coaxial, is driven by motor.
As shown in Figures 2 and 3, the blade suction surface leading edge on impeller 3 is equipped with two suctions arranged along vane type line spacing b2
Power face concave point group, b2 be blade along molded line direction height mean value 15%；Suction surface concave point group includes that edge is inclined with blade inlet edge
Five suction surface concave point 3-1A of the parallel straight line arrangement in angle；Blade inlet edge inclination angle is 20 °；Blade inlet edge is to any one suction surface
The distance of concave point is all in 5%~15% range of vane type line length；The hemispherical of suction surface concave point 3-1A diametrically D, D take
Value is the 5%~10% of blade average thickness；The center of adjacent suction face concave point is blade along type away from b1 in suction surface concave point group
The 15% of height mean value on line direction, the suction surface concave point center from middle position in the closer suction surface concave point group of blade inlet edge
Positioned at the half height and position of blade height mean value along molded line direction；It is intermediate from the farther away suction surface concave point group of blade inlet edge
The suction surface concave point centre-height of position is than the suction surface concave point from middle position in the closer suction surface concave point group of blade inlet edge
Centre-height is high, difference be blade along molded line direction height mean value 12%.
As shown in Figures 2 and 4, the blade pressure surface leading edge on impeller 3 is equipped with three pressure arranged along vane type line spacing
The spacing of face concave point group, blade inlet edge and the pressure face concave point group nearest from blade inlet edge is that blade height along molded line direction is equal
The spacing B2 of the 5% of value, the pressure face concave point group nearest from blade inlet edge and intermediate pressure face concave point group is blade along molded line side
The spacing B3 of the 15% of upward height mean value, intermediate pressure face concave point group and the pressure face concave point group farthest from blade inlet edge is leaf
Piece along molded line direction height mean value 10%；Pressure face concave point group includes arranging along the straight line parallel with blade inlet edge inclination angle
Five pressure face concave point 3-2A；Blade inlet edge to any one pressure face concave point distance all vane type line length 5%~
In 30% range；The hemispherical of pressure face concave point diametrically D；The center of adjacent pressure face concave point is away from B1 in pressure face concave point group
Blade along molded line direction height mean value 15%；The pressure face concave point center in middle position is located at leaf in each pressure face concave point group
45% height and position of piece height mean value along molded line direction.
As shown in figures 2 and 5, front hub is located at the outlet end impeller Ye Dao equipped with front hub winglet 5-A, and rear-wheel hub is located at impeller
The outlet end Ye Dao is set there are two rear-wheel hub winglet 5-B；The outlet end Ye Dao camber line is divided into second-class by the trailing edge of front hub winglet 5-A
Point, the outlet end Ye Dao camber line is divided into trisection by the trailing edge of two rear-wheel hub winglet 5-B；Front hub winglet 5-A and rear-wheel hub are small
The thickness of wing 5-B is the 20%~30% of vane thickness, shares five blades being evenly distributed, therefore, the type on impeller 3
There are five leaf roads for micro centrifugal pump；The angle of outlet of front hub winglet 5-A and rear-wheel hub winglet 5-B are equal with outlet blade angle；Such as
Shown in Fig. 6 and 7, the leading edge of front hub winglet 5-A and the angle of impeller axis are θ 1, and 1 value of θ is 10 °~40 °, and rear-wheel hub is small
The leading edge of wing 5-B and the angle of impeller axis are θ 2, and 2 value of θ is 7 °~30 °；The molded line length L1 of front hub winglet 5-A is leaf
The 10% of piece molded line length, the molded line length L2 of rear-wheel hub winglet 5-B are the 15% of vane type line length L, front hub winglet 5-A
Height with rear-wheel hub winglet 5-B is H, H value be blade along molded line direction height mean value 5%~10%.
The circulation blood supply principle of the Minitype centrifugal blood pump of the anti-haemocyte damage is as follows:
Blood is entered by the import of drive end bearing bracket 1, and the blade of impeller converts mechanical energy to the mechanical energy of blood.Blood has
Characteristic easily rupturable when haemocyte stress complexity in biggish viscosity and blood, wall shear stress represent the damage of the friction at wall surface
It loses, is a very important parameter for the interior stream research of pump for conveying blood.The big place of boundary shear stress is also to answer
Power concentrates place, not only be easy to cause the conevying efficiency of the broken influence blood pump of haemocyte in blood, and easily cause part
Boundary layer thickeies and generates small size vortex, and small size vortex is easy to become large scale vortex by development, generates noise.It reduces
The boundary shear stress of suction surface leading edge integrated distribution, it is corresponding to weaken in runner close to the up-front stress of blade suction surface, it can make
In blood haemocyte suction surface edge as higher stress and caused by the broken situation of haemocyte be eased.Suction surface
Boundary layer than pressure face boundary thickness much, causes suction surface flowing considerably complicated, and as fluid is from leading edge to rear
In the process, suction surface adverse pressure gradient constantly increases, and suction surface boundary layer is caused constantly to thicken, two suction of blade suction surface leading edge
The presence of face concave point group causes the variation of local edge interlayer, enables the biggish blood of viscosity to be detached from blade surface as early as possible, drops
Boundary layer thickness on low suction surface.Distribution of the boundary shear stress on pressure face and suction surface is different, and is distributed in suction
The up-front boundary shear stress Extreme maximum distribution in power face is in 5%~15% range of vane type line length, the up-front wall of pressure face
Face shearing force Extreme maximum distribution is in 5%~30% range of vane type line length, and because pressure face upper wall surface shearing force point
Cloth range is wider, and boundary shear stress is provided with three pressure face concave point groups rearward with respect to suction surface, in pressure face leading edge, weakens viscous
Contact of the property blood with wall surface, thereby reduces the viscous friction of blood and wall surface on pressure face, improves on blade pressure surface
Flow regime.As it can be seen that two suction surface concave point groups and three pressure face concave point groups are to the wall for causing haemocyte breakage in blood
The distribution of face shearing force is improved, and vortex is improved, and inhibits the generation of large scale vortex, in advance by the vortex of non-mature
It is broken into small size vortex, is flowed for improving, stress complexity of the haemocyte in flowing is weakened, it is broken for reducing haemocyte
It damages most important.
The blood of flowing is continuously increased in the Ye Daozhong mechanical energy of impeller, and front hub is located at the front-wheel of the outlet end impeller Ye Dao
Two rear-wheel hub winglet 5-B that hub winglet 5-A and rear-wheel hub are located at the outlet end impeller Ye Dao control due to fluid pressure and
Radial Flow caused by centrifugal force is uneven, while the size in a pair of channels whirlpool in blade passage is also controlled, also just control
The Secondary Flow of radial motion reduces the uneven of speed, reduces jet stream Trailing Edge Loss, it is suppressed that the vortices breakdown and stream of leaf road tail end
Dynamic be lost simultaneously controls vortex shedding, and then controls the biggish blood of the viscosity boundary layer thickness of bottom surface and whirlpool on leaf road and fall off
Frequency cuts big Passage Vortex, is combed into countless small vortex, and the viscous fluid in runner is effectively separated,
Guiding reduces Trailing Edge Loss and eddy current crack.
Blood is rotated out of impeller by the centrifugal action through impeller.Blood travels further into spiral case, and the spiral case of variable cross-section is at this time
Part kinetic energy in blood is further converted to potential energy, is then exported by volute outlet by the effect for acting as vaneless diffuser.
Claims (3)
1. a kind of Minitype centrifugal blood pump of anti-haemocyte damage, including drive end bearing bracket, rear end cap and impeller；Impeller and drive end bearing bracket,
Rear end cap is coaxial, is driven by motor；It is equipped between vane type line it is characterized by: the blade inlet edge on impeller is located at suction surface
Away from b2 arrangement two suction surface concave point groups, b2 be blade along molded line direction height mean value 15%~18%；The suction
Power face concave point group includes the five suction surface concave points arranged along the straight line parallel with blade inlet edge inclination angle；Blade inlet edge inclination angle is
20 °~30 °；Blade inlet edge to any one suction surface concave point distance all in 5%~15% range of vane type line length；It inhales
The hemispherical of power face concave point diametrically D, D value are the 5%~10% of blade average thickness；Adjacent suction in suction surface concave point group
The center of face concave point away from for blade along molded line direction height mean value 14%~16%, it is recessed from the closer suction surface of blade inlet edge
The suction surface concave point center in middle position is located at the half height and position of blade height mean value along molded line direction in point group；From leaf
The suction surface concave point centre-height ratio in middle position is from the closer suction of blade inlet edge in the farther away suction surface concave point group of piece leading edge
The suction surface concave point centre-height in middle position is high in the concave point group of face, difference be blade along molded line direction height mean value 10%
~14%；
Blade inlet edge on impeller is located at pressure face and is equipped with the three pressure face concave point groups arranged along vane type line spacing, blade
The spacing of leading edge and the pressure face concave point group nearest from blade inlet edge be blade along molded line direction height mean value 4%~6%,
The spacing of the pressure face concave point group and intermediate pressure face concave point group nearest from blade inlet edge is that blade height along molded line direction is equal
The spacing of the 14%~16% of value, intermediate pressure face concave point group and the pressure face concave point group farthest from blade inlet edge is blade along type
The 9%~11% of height mean value on line direction；The pressure face concave point group includes along the straight line parallel with blade inlet edge inclination angle
Five pressure face concave points of arrangement；Blade inlet edge to any one pressure face concave point distance all vane type line length 5%~
In 30% range；The hemispherical of pressure face concave point diametrically D；The center of adjacent pressure face concave point is away from for leaf in pressure face concave point group
Piece along molded line direction height mean value 14%~16%；The pressure face concave point centre bit in middle position in each pressure face concave point group
In 45% height and position of blade height mean value along molded line direction；
Front hub is located at the outlet end impeller Ye Dao equipped with front hub winglet, and rear-wheel hub is located at the outlet end impeller Ye Dao and sets there are two after
Wheel hub winglet；The outlet end Ye Dao camber line is divided into bisection by the trailing edge of front hub winglet, and the trailing edges of two rear-wheel hub winglets is by leaf
Road outlet end camber line is divided into trisection；The thickness of front hub winglet and rear-wheel hub winglet is the 20%~30% of vane thickness；
The angle of outlet of front hub winglet and rear-wheel hub winglet is equal with outlet blade angle；The leading edge of front hub winglet and the folder of impeller axis
Angle is 10 °~40 °, and the angle of the small nose of wing of rear-wheel hub and impeller axis is 7 °~30 °；The molded line length of front hub winglet is leaf
The 10% of piece molded line length, the molded line length of rear-wheel hub winglet are the 15% of vane type line length, front hub winglet and rear-wheel hub
The height of winglet is H, H value be blade along molded line direction height mean value 5%~10%.
2. a kind of Minitype centrifugal blood pump of anti-haemocyte damage according to claim 1, it is characterised in that: before described
Gasket is set between end cap and rear end cap, and drive end bearing bracket and rear end cap are bolted.
3. a kind of Minitype centrifugal blood pump of anti-haemocyte damage according to claim 1, it is characterised in that: the leaf
5~8 blades being evenly distributed are shared on wheel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720465695.XU CN208660018U (en) | 2017-04-28 | 2017-04-28 | A kind of Minitype centrifugal blood pump of anti-haemocyte damage |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720465695.XU CN208660018U (en) | 2017-04-28 | 2017-04-28 | A kind of Minitype centrifugal blood pump of anti-haemocyte damage |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208660018U true CN208660018U (en) | 2019-03-29 |
Family
ID=65818794
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720465695.XU Expired - Fee Related CN208660018U (en) | 2017-04-28 | 2017-04-28 | A kind of Minitype centrifugal blood pump of anti-haemocyte damage |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN208660018U (en) |
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2017
- 2017-04-28 CN CN201720465695.XU patent/CN208660018U/en not_active Expired - Fee Related
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| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20190329 Termination date: 20200428 |