CN209236365U - Freeze melting device - Google Patents
Freeze melting device Download PDFInfo
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- CN209236365U CN209236365U CN201821338208.4U CN201821338208U CN209236365U CN 209236365 U CN209236365 U CN 209236365U CN 201821338208 U CN201821338208 U CN 201821338208U CN 209236365 U CN209236365 U CN 209236365U
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- liquid level
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- melting device
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Abstract
The utility model relates to a kind of freeze melting devices, belong to cryoablation technical field, the cryoablation of single depth can only be carried out by solving a set of freeze melting device in the prior art, the cryoablation of different depth cannot be realized simultaneously, the output of cooling capacity can not be adjusted, temperature adjusts not accurate enough, adjustable range and use scope is limited, and device volume is huge, structure is complicated, the technical problems such as not easy to operate and control.The freeze melting device includes gas source, heat-exchange device, cryogen vessel and leve monitor；Leve monitor is used to monitor the liquid level in cryogen vessel；Heat-exchange device includes heat exchanger, the first connecting tube and the second connecting tube；Heat exchanger is arranged in cryogen vessel and is connect by the first connecting tube with gas source, and the second connecting tube is for exporting cold working gas.The utility model realizes cryoablation technology in the extensive use of medical field.
Description
Technical field
The utility model relates to cryoablation technical field more particularly to a kind of freeze melting devices.
Background technique
By the development of many years, the minimally invasive ablation technology such as cryoablation, RF ablation, microwave, laser is controlled in tumour
It is widely used in treatment.
For existing freeze melting device mostly without temp regulating function, minority has the cryoablation of temp regulating function
Device mostly uses greatly different refrigerants or different refrigerants to control cooling capacity output by different proportion mixing (gas medium)
(adjusting temperature).
In the prior art, a set of freeze melting device can only carry out the cryoablation of single depth, cannot realize simultaneously not
With the cryoablation of depth；The control speed that can not be exported to cooling capacity is adjusted.In addition to this, existing freeze melting device
Bulky, structure is complicated, and temperature adjusts not accurate enough, and adjustable range and is of limited application.
Utility model content
In view of above-mentioned analysis, the utility model is intended to provide a kind of freeze melting device and is at least able to solve following technology
One of problem: (1) a set of freeze melting device can only carry out the cryoablation of single depth, cannot realize different depth simultaneously
Cryoablation；(2) it can only realize pre-set freezing depth, cannot achieve and change freezing depth in refrigerating process；(3)
Temperature adjusting is not accurate enough and adjustable range and use scope are limited；(4) output of cooling capacity can not be adjusted；(5) existing
Freeze melting device it is bulky, structure is complicated, it is not easy to operate and control.
The purpose of this utility model is mainly achieved through the following technical solutions:
A kind of freeze melting device, including gas source, heat-exchange device, cryogen vessel and leve monitor；
Leve monitor is used to monitor the liquid level of refrigerant in cryogen vessel；
Heat-exchange device includes heat exchanger, the first connecting tube and the second connecting tube；Heat exchanger setting is held in refrigerant
It is connect in device and by the first connecting tube with gas source, the second connecting tube is for exporting cold working gas.
On the basis of above scheme, the utility model has also done following improvement:
Further, which further includes liquid level regulation device, and liquid level regulation device is for adjusting refrigerant liquid
The height of position.
Further, liquid level regulation device includes refrigerant vessel, communication means and controller；
Refrigerant vessel are used for company's on-off of refrigerant vessel and cryogen vessel for storing refrigerant, communication means
It opens；Controller is electrically connected with communication means.
Further, communication means are valve body or liquid pump.
Further, valve body in the open state, is provided with different openings of sizes, is open bigger, refrigerant flow rates are faster.
Further, refrigerant vessel are self-supercharging device, and refrigerant vessel are equipped with pressure gauge and pressure regulating part.
Further, leve monitor is temperature sensor；The quantity of temperature sensor is multiple and is arranged at intervals on refrigeration
On the inner wall or heat exchanger of agent container.
Further, leve monitor is supersonic liquid level monitor or gravity sensor；The setting of supersonic liquid level monitor
On the refrigerant liquid level of cryogen vessel；Gravity sensor is set to the bottom of cryogen vessel.
Further, which further includes conduit, and conduit includes tube body and effectively freezes region；It is equipped in tube body
Air inlet pipe and muffler, air inlet pipe will be delivered to effectively freezing region by the gas of cryogen vessel, and muffler is as refrigeration
The circuit of agent.
Further, effectively freezing region is equipped with temperature sensor.
The utility model has the beneficial effect that:
(1) freeze melting device of the utility model monitors the liquid level of refrigerant by setting leve monitor,
Reflect the contact area of liquid refrigerant and heat-exchange device by liquid level, and then the liquid level by changing refrigerant is high
Degree achievees the purpose that the contact area for changing liquid refrigerant and heat-exchange device, to realize the output of different cooling capacity；
(2) freeze melting device of the utility model is by setting liquid level regulation device, so that the liquid level of refrigerant
Stepless changing may be implemented, heat exchange area area adjusts in real time, adapts to various cryogenic temperature demands, has a wide range of application, adapts to
Property is strong；
(3) it since liquid level regulation device is self-supercharging device, and is provided between refrigerant vessel and cryogen vessel
Valve body, so, the inside of refrigerant vessel can be constantly in high pressure, and when valve body is opened, refrigerant circulates in time, and valve body
With different openings size, realizes the liquid level in friction speed adjustment cryogen vessel, increase control speed and control
Precision；
(4) by setting liquid pump, the refrigerant in refrigerant vessel can be transferred in cryogen vessel, meanwhile,
Refrigerant in cryogen vessel can be transferred in refrigerant vessel, can not only realize that pre-set freezing is deep
Degree, and can satisfy in refrigerating process the demand of Iterim Change freezing depth according to the actual situation；
(5) output of different cooling capacity is realized by adjusting the mode of liquid level, control mode is simple and accuracy is high；
(6) appliance arrangement is few, small in size, at low cost, and structure is simple, easy to operate and realize.
It in the utility model, can also be combined with each other between above-mentioned each technical solution, to realize more preferably combination sides
Case.Other feature and advantage of the utility model will illustrate in the following description, also, certain advantages can be from specification
It becomes apparent, or is understood and implementing the utility model.The purpose of this utility model and other advantages can pass through
It is achieved and obtained in specifically noted content in bright book, claims and attached drawing.
Detailed description of the invention
Attached drawing is only used for showing the purpose of specific embodiment, and is not considered as limitations of the present invention, entire
In attached drawing, identical reference symbol indicates identical component.
Fig. 1 is the structural schematic diagram of the freeze melting device embodiment of the utility model；
Fig. 2 is that the freeze melting device embodiment refrigerant vessel of the utility model are the structural representation of self-supercharging device
Figure；
Liquid pump is arranged between the freeze melting device embodiment refrigerant vessel and cryogen vessel of the utility model in Fig. 3
Structural schematic diagram；
Fig. 4 is set to the structure on heat exchanger for the freeze melting device embodiment leve monitor of the utility model and shows
It is intended to；
Fig. 5 is that the freeze melting device embodiment leve monitor of the utility model is set to the refrigerant of cryogen vessel
Structural schematic diagram on liquid level；
Fig. 6 is that the freeze melting device embodiment leve monitor of the utility model is set to the knot of cryogen vessel bottom
Structure schematic diagram；
Fig. 7 is that the freeze melting device embodiment of the utility model is arranged the structural representation of heat insulating member outside air inlet pipe
Figure.
Appended drawing reference:
1- gas source；2- heat-exchange device；21- heat exchanger；The first connecting tube of 22-；The second connecting tube of 23-；3- refrigerant
Container；4- temperature sensor；5- liquid level regulation device；51- refrigerant vessel；52- valve body；53- controller；54- liquid pump；6- is led
Pipe；61- tube body；62- effectively freezes region；611- air inlet pipe；612- muffler；7- supersonic liquid level monitor；8- gravity passes
Sensor；9- heat insulating member.
Specific embodiment
Specifically describe the preferred embodiment of the utility model with reference to the accompanying drawing, wherein attached drawing constitutes the application one
Point, and be used to illustrate the principles of the present invention together with the embodiments of the present invention, it is not intended to limit the utility model
Range.
Embodiment one
Present embodiment discloses a kind of freeze melting devices, as shown in Figure 1, the device include gas source 1, heat-exchange device 2,
Cryogen vessel 3 and leve monitor.
Leve monitor is used to monitor the liquid level in cryogen vessel 3.
Heat-exchange device 2 includes heat exchanger 21, the first connecting tube 22 and the second connecting tube 23；The setting of heat exchanger 21 exists
It being connect in cryogen vessel 3 and by the first connecting tube 22 with gas source 1, the second connecting tube 23 is used to export cold working gas,
As depicted in figs. 1 and 2.
When implementation, the pressure that gas source 1 exports is constant, and liquid refrigerant is filled in cryogen vessel 3, and gas passes through connecting tube
Enter heat exchanger 21 afterwards, the gas after heat exchange becomes cold working gas, and by conduit 6, conduit 6 includes tube body 61 and has
Effect freezing region 62, tube body 61 is interior to be equipped with air inlet pipe 611 and muffler 612；Air inlet pipe 611 will be by the gas of cryogen vessel 3
Body is delivered to effectively freezing region 62, effectively freezes the fitting pathological tissues of region 62 and is freezed, muffler 612 is used as refrigerant
Circuit.
The pressure that gas source 1 exports is constant, and by taking gas source is nitrogen, refrigerant is liquid nitrogen as an example, 1 constant pressure of gas source exists
Within the scope of 3.0MPa to 3.8MPa, this pressure limit can make effectively to freeze 62 fast cooling of region, while can also be effective
Reduce " vent plug " phenomenon.
Liquid refrigerant and 21 contact site of heat exchanger in cryogen vessel 3 form heat exchange area, different liquid
Position height contacts the heat exchange area area difference formed with heat exchanger 21, and working gas is after different heat exchange areas
Generate the different work refrigerant of temperature, under equal conditions, the work refrigerant temperature that the big heat exchanger of surface area generates is low.
Before freezing starts, depth, cryogenic temperature are freezed according to required for lesion, heat exchange area size is determined, that is, makes
Cryogen liquid level.The liquid level in cryogen vessel 3 is risen into setting height by the way that refrigerant is added, and is disappeared in freezing
During melting, the refrigerant consumed in cryogen vessel 3 is continuously replenished according to setting, keeps refrigerant in cryogen vessel 3
Liquid level is constant (keeping the area of heat exchange area constant).
Compared with prior art, freeze melting device provided in this embodiment has the beneficial effect that:
(1) freeze melting device of the utility model monitors the liquid level of refrigerant by setting leve monitor,
Reflect the contact area of liquid refrigerant and heat-exchange device by liquid level, and then the liquid level by changing refrigerant is high
Degree achievees the purpose that the contact area for changing liquid refrigerant and heat-exchange device, to realize control refrigerating plant output
Temperature；
(2) it had both been able to achieve for requiring freezing range wide, and had freezed the cryoablation of the lesion of depth depth, and can be realized pair
In requiring freezing range small, the cryoablation of the lesion of depth as shallow is freezed；
(3) temperature regulating range is wide, and use scope is wide；
(4) control mode is simple and accuracy is high；
(5) appliance arrangement is few, small in size, at low cost, and structure is simple, easy to operate and realize.
Embodiment two
In order to more easily adjust the liquid level in cryogen vessel 3, the freeze melting device of the present embodiment is also wrapped
Liquid level regulation device 5 is included, liquid level regulation device 5 includes refrigerant vessel 51, communication means and the control for controlling communication means
Device 53 processed；Refrigerant vessel 51 are for temporarily storing liquid refrigerant, and communication means are for realizing refrigerant vessel 51 and refrigeration
The connection or disconnection of agent container 3；Controller 53 is electrically connected with communication means.By the way that liquid level regulation device is arranged, may be implemented pair
In the stepless changing of refrigerant liquid level, so that heat exchange area area adjusts in real time, various cryogenic temperature demands is adapted to, are answered
It is wide, adaptable with range.
Illustratively, communication means can be valve body 52.Cryogen vessel 3 and refrigerant vessel 51 is arranged in valve body 52
Junction.Controller 53 is electrically connected with valve body 52, the open and close state and openings of sizes for application valve body 52.
When valve body 52 in the open state, cryogen vessel 3 and refrigerant vessel 51 are in connected state；When valve body 52
When being in close state, cryogen vessel 3 is in an off state with refrigerant vessel 51, realizes liquid by the open and close of valve body
Position is adjusted, easy to operate, practical, conveniently.
In addition, valve body is provided with different openings of sizes in the open mode, and when the opening of valve body is big, refrigerant vessel
In refrigerant flow direction cryogen vessel flow velocity increase；Refrigerant flow direction when the opening of valve body is small, in refrigerant vessel
The flow velocity of cryogen vessel reduces.The liquid in friction speed adjustment cryogen vessel 3 may be implemented in the different openings size of valve body
Position height, adaptability are wider.
It is worth noting that, communication means may be liquid pump.Liquid pump 54 is electrically connected with controller 53, as shown in figure 3, control
Device 53 processed controls the switch and shift direction of liquid pump 54.Refrigerant in refrigerant vessel 51 can be transferred to refrigeration by liquid pump 54
In agent container 3, it is also possible to the refrigerant in cryogen vessel 3 is transferred in refrigerant vessel 51, meanwhile, liquid pump is set
It is equipped with different pumping powers, power is bigger, and the speed of suction is faster, according to demand in actual use, can set
Different pumping powers, use scope is wider, using more convenient.Using the mobile refrigerant of the suction capactity of liquid pump, have following
The utility model has the advantages that (1) cryogen vessel 3 is unrestricted with the exhaust position of refrigerant vessel 51, freedom degree becomes larger；(2) liquid pump 54
It can be with way moving refrigerant, in use process, if necessary to reduce the output of cooling capacity, then by the refrigeration in cryogen vessel 3
Agent is transferred in refrigerant vessel 51；If necessary to increase the output of cooling capacity, then the refrigerant in refrigerant vessel 51 is shifted
Into cryogen vessel 3, i.e., it can not only realize pre-set freezing depth, and can satisfy the root in refrigerating process
According to the demand of actual conditions Iterim Change freezing depth, so that the freeze melting device adaptability of the present embodiment is wider.
Embodiment three
In order to enable the placement position of refrigerant vessel is more flexible, the refrigerant vessel 51 in liquid level regulation device 5 are set
It is calculated as self-supercharging device, and is equipped with pressure gauge and pressure regulating part on refrigerant vessel, as shown in Figure 2.In refrigerant vessel
In the refrigerant flow direction cryogen vessel 3 that the high-pressure state in portion keeps it internal, reach the mesh of liquid level in adjustment cryogen vessel 3
's.Pressure gauge can indicate the pressure inside refrigerant vessel, the pressure meeting with the gasification of refrigerant, inside refrigerant vessel
It gradually increases, when pressure is up to the maximum pressure that refrigerant vessel can bear, system is reduced by pressure regulating part
Pressure inside cryogen vessel guarantees the safety used.
Illustratively, pressure regulating part can be pressure-regulating valve or refrigerant vessel can be made to be in communication with the outside or disconnect
Spanner.
In order to the pressure inside more intelligent control refrigerant vessel, pressure regulating part and controller 53 are electrically connected
It connects, controller is used to control opening or closing for pressure regulating part.Pressure inside refrigerant vessel reaches preset
When pressure, controller keeps control pressure regulating part in the open state；Pressure reduction inside refrigerant vessel is to can expire
For foot into cryogen vessel when mobile refrigerant, controller is in close state control pressure regulating part.
Due to being provided with the barrier of valve body 52, the inside of refrigerant vessel 51 can be constantly in high pressure, and valve body 52 is opened
When, refrigerant circulates in time, increases control speed and precision.If not set valve body 52, liquid level is needed in refrigerant vessel 51
The liquid level being consistently lower than in cryogen vessel 3, and from when flowing in cryogen vessel 3 in refrigerant vessel 51, it needs to wait
The 51 internal pressurization time of refrigerant vessel, it may appear that control delay, and control accuracy difference.Refrigerant is moved using supercharging mode,
Liquid level in cryogen vessel 3 is adjusted, so that cryogen vessel 3 and the placement position of refrigerant vessel 51 are unrestricted, freedom degree
It is bigger.
Illustratively, refrigerant vessel can be located at the top of cryogen vessel, can also be located at phase with cryogen vessel
Same height, or positioned at the lower section of cryogen vessel.
When refrigerant vessel are located above cryogen vessel, refrigerant vessel can not use self-supercharging device, utilize
The gravity of the liquid level difference and refrigerant vessel inner refrigerant of cryogen vessel and refrigerant vessel inner refrigerant is to refrigeration
Mobile refrigerant in agent container.Meanwhile refrigerant vessel are located at cryogen vessel top and liquid level regulation device can also be made whole
It is compact-sized simple.
Example IV
In view of it is more than refrigerant liquid level temperature and refrigerant liquid level temperature difference below it is significant, so, pass through temperature
The change of degree can most reflect the liquid level of refrigerant, therefore the leve monitor of this implementation is multiple temperature sensors, and
Multiple temperature sensors are alternatively arranged according to setting, are arranged on the inner wall of cryogen vessel 3, as shown in figure 3, utilizing temperature
Variation monitor the variation of liquid level.
Illustratively, multiple temperature sensors also can be set on heat exchanger 21, as shown in figure 4, installation is more convenient,
Structure is simpler.
Specifically, the leve monitor of the present embodiment may be supersonic liquid level monitor or gravity sensor.When
When selecting supersonic liquid level monitor, supersonic liquid level monitor is set to the ullage of cryogen vessel, such as Fig. 5 institute
Show.Using contactless supersonic liquid level monitor, so that liquid level feedback is more acurrate.When selecting gravity sensor, need
Cryogen vessel and refrigerant vessel are provided separately, and the lower section of cryogen vessel is arranged in gravity sensor, according to refrigeration
The gravity of agent container 3 changes to feed back the variation of liquid level, as shown in Figure 6.Use gravity sensor as leve monitor, makes
It is accurate to obtain level monitoring, installation is simply, conveniently.
It is worth noting that, heat exchanger can be designed to different shapes, so as to be suitable for different refrigerants
Liquid level.Specifically, heat exchanger can be set to the pipeline of specific shape, such as helical form or folded bent shape, such as Fig. 1
With shown in Fig. 7.It is convenient, simple that folded bent shape heat exchanger is realized.The height of such structure heat exchanger of same surface area is low,
It is of less demanding to the liquid level of liquid refrigerant, it is easy to use.And cylindric heat converter structure is compact, it is easy to assembly.
Embodiment five
In order to more acurrate, more intuitively reaction freeze melting device output temperature, the present embodiment is effectively being freezed
Region is equipped with temperature sensor, liquid level can be adjusted in real time according to the Real-time Feedback of temperature sensor, to make whole
A system is in controllable state.
It, can also be in air inlet pipe and/or muffler in order to know the output temperature of freeze melting device in real time
Temperature sensor is set, so as to adjust liquid level in real time according to the Real-time Feedback of temperature sensor more in time, control
It makes more accurate.
It is worth noting that, the practical specific value of the temperature sensor of above-mentioned two position is different, but there is corresponding patrol
The relationship of collecting, can reflect the state of freeze melting device.
Since intake manifold temperature is lower than muffler, in order to reduce influence of the relatively high temperature of muffler to air inlet pipe,
It is arranged heat insulating member outside air inlet pipe, reduces the heat exchange of itself and muffler and environment, drops to the loss of refrigeration capacity of air inlet pipe most
It is low, to improve the utilization rate of cooling capacity.
In order to further decrease working gas in pipe with it is extraneous it is cold and hot exchange, heat insulating member is also arranged outside muffler.
Illustratively, heat insulating member can be vacuum heat-insulating pipe or insulating layer.
In addition to this, it is exchanged to reduce the relatively low working gas of temperature in pipe with the cold and hot of external environment, in addition to
It is arranged other than heat insulating member outside pipe, connecting tube, air inlet pipe and muffler can also be designed as to the structure (heat exchange of bimetallic tube
Except pipeline at device), that is, it include inner and outer tubes, gas flows in inner tube, is vacuum chamber between inner and outer tubes, sufficiently
Vacuum heat preservation and insulation.It can also filling with insulation material between the inner and outer pipe sections.
It is worth noting that, the heat exchanger in the present embodiment can be integrally formed with connecting tube, or heat exchange
It is connect after device is separately formed with connecting tube.In order to guarantee that heat exchanger has good heat transfer effect, by the pipe at heat exchanger
Line selection is selected as metal material, meanwhile, in order to which pipeline is exchanged with the cold and hot of external environment at the rest of reducing, and by heat exchanger
Pipeline other than place's pipeline is selected as the bad material of heat-conducting effect, such as plastics.
It being exchanged to reduce refrigerant with the cold and hot of external environment, the cryogen vessel of the present embodiment has heat insulation function,
One or more layers insulating layer can be set outside cryogen vessel, cryogen vessel can also be designed to the structure of insulation barrel.
The preferable specific embodiment of the above, only the utility model, but the protection scope of the utility model is not
It is confined to this, anyone skilled in the art within the technical scope disclosed by the utility model, can readily occur in
Change or replacement, should be covered within the scope of the utility model.
Claims (10)
1. a kind of freeze melting device, which is characterized in that including gas source, heat-exchange device, cryogen vessel and leve monitor；
The leve monitor is used to monitor the liquid level of refrigerant in the cryogen vessel；
The heat-exchange device includes heat exchanger, the first connecting tube and the second connecting tube；The heat exchanger is arranged described
It is connect in cryogen vessel and by first connecting tube with the gas source, second connecting tube is for exporting low-temperature working
Gas.
2. freeze melting device according to claim 1, which is characterized in that it further include liquid level regulation device, the liquid level
Regulating device is used to adjust the height of refrigerant level.
3. freeze melting device according to claim 2, which is characterized in that the liquid level regulation device includes refrigerant device
Ware, communication means and controller；
The refrigerant vessel hold for storing refrigerant, the communication means for the refrigerant vessel and the refrigerant
The connection or disconnection of device；The controller is electrically connected with the communication means.
4. freeze melting device according to claim 3, which is characterized in that the communication means are valve body or liquid pump.
5. freeze melting device according to claim 4, which is characterized in that the valve body in the open state, is provided with
Different openings of sizes is open bigger, and refrigerant flow rates are faster.
6. freeze melting device according to claim 3, which is characterized in that the refrigerant vessel are self-supercharging device,
The refrigerant vessel are equipped with pressure gauge and pressure regulating part.
7. freeze melting device according to any one of claims 1 to 6, which is characterized in that the leve monitor is temperature
Spend sensor；The quantity of the temperature sensor is that inner walls that are multiple and being arranged at intervals on the cryogen vessel or the heat are handed over
On parallel operation.
8. freeze melting device according to any one of claims 1 to 6, which is characterized in that the leve monitor is super
Sound wave liquid level monitor or gravity sensor；The supersonic liquid level monitor is set to the refrigerant liquid of the cryogen vessel
On face；The gravity sensor is set to the bottom of the cryogen vessel.
9. freeze melting device according to claim 1, which is characterized in that further include conduit, the conduit includes tube body
With effective freezing region；Air inlet pipe and muffler are equipped in the tube body, the air inlet pipe will be by the cryogen vessel
Gas is delivered to effective freezing region, circuit of the muffler as refrigerant.
10. freeze melting device according to claim 9, which is characterized in that effective freezing region is passed equipped with temperature
Sensor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821338208.4U CN209236365U (en) | 2018-08-20 | 2018-08-20 | Freeze melting device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821338208.4U CN209236365U (en) | 2018-08-20 | 2018-08-20 | Freeze melting device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209236365U true CN209236365U (en) | 2019-08-13 |
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ID=67515503
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| CN201821338208.4U Active CN209236365U (en) | 2018-08-20 | 2018-08-20 | Freeze melting device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109044523A (en) * | 2018-08-20 | 2018-12-21 | 宁波胜杰康生物科技有限公司 | Cryoablation system |
-
2018
- 2018-08-20 CN CN201821338208.4U patent/CN209236365U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109044523A (en) * | 2018-08-20 | 2018-12-21 | 宁波胜杰康生物科技有限公司 | Cryoablation system |
| CN109044523B (en) * | 2018-08-20 | 2020-06-16 | 宁波胜杰康生物科技有限公司 | Cryoablation system |
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