CN212879550U - Heat exchange structure for cryoablation probe - Google Patents
Heat exchange structure for cryoablation probe Download PDFInfo
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- CN212879550U CN212879550U CN202021380504.8U CN202021380504U CN212879550U CN 212879550 U CN212879550 U CN 212879550U CN 202021380504 U CN202021380504 U CN 202021380504U CN 212879550 U CN212879550 U CN 212879550U
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Abstract
The utility model relates to a heat transfer structure for cryoablation probe, its characterized in that: comprises an outer sleeve, a heat conducting pipe which is concentrically and coaxially arranged and has two sealed ends is arranged in the outer sleeve; the air inlet pipe is wound on the outer surface of the heat conduction pipe; the winding of the air inlet pipe enables an axial gap to be formed between every two turns of the wound air inlet pipe; a radial gap is arranged between the outer sleeve and the air inlet pipe; the utility model has the advantages and positive effects that: and the double-winding heat exchange design is adopted, so that the processing technology is simple. The radial length of the doubly-wound functional pipe is smaller than that of the air inlet pipe, and the heat exchange space is improved. The functional tubes with various types and functions can be matched for use, so that the heat exchange structure can complete superposition and synergy of various practical functions.
Description
Technical Field
The utility model relates to a heat transfer device, especially a heat transfer structure for cryoablation probe.
Background
The cryoablation probe is a common device for tumor therapy, and a method for treating tumors by using the cryoablation probe is to freeze a target area by using low temperature so as to enable lesion tissues to undergo cooling, freezing and rewarming, thereby causing irreversible damage and necrosis.
The cold knife of the gas throttling system is the mainstream of clinical application at present, and the used throttling gas mainly comprises argon, helium, nitrogen, mixed working medium and the like. The argon-helium knife uses argon for throttling and cooling, helium for heating, and has the advantages of small and portable device, rapid temperature rise and drop of the cold knife head and the like, but the working pressure of argon is up to 40MPa, the argon is not easy to obtain, certain potential safety hazards exist, and the argon and the helium are rare gases, so that the operation cost is high. The nitrogen throttling system is used for working at a low pressure, but the nitrogen is pre-cooled if the cold knife is required to reach the treatment temperature. The nitrogen precooling device generally adopts a self-cascade refrigeration system, and the system has larger volume, high working noise and long precooling time, and is not beneficial to carrying and operation.
Therefore, in the design of the cryoablation probe, the heat exchange structure is a common design for ensuring the precooling effect, generally speaking, the heat exchange structure has a single effect of simply refrigerating fluid, single-layer winding and threaded pipes (finned pipes) are the use structures of most probes on the market, the single-layer winding is a tight winding structure, the tight winding can influence the heat exchange space, and further has adverse influence on the ice ball size of the cryoablation probe, the threaded pipes (finned pipes) are high in production cost, and the technical difficulty of production is relatively high.
SUMMERY OF THE UTILITY MODEL
The to-be-solved problem of the utility model is to provide a heat transfer structure for cryoprobe, this structure has dual winding's design, has promoted the heat transfer space under the prerequisite of processing convenience, saving cost to solve heat transfer structure function singleness, heat exchange efficiency is poor and then influence have the small and high problem of heat transfer structure manufacturing cost of the puck that melts probe generation of freezing function.
In order to solve the technical problem, the utility model discloses a technical scheme is: a heat exchange structure for a cryoablation probe comprises an outer sleeve, wherein the inner part of the outer sleeve is provided with a heat exchange structure
a) A heat conduction pipe concentrically and coaxially arranged;
b) the air inlet pipe is wound on the outer surface of the heat conduction pipe;
c) the winding of the air inlet pipe enables an axial gap to be formed between every two turns of the wound air inlet pipe;
d) the axial clearance is 0.1mm-1 mm;
e) a radial gap is arranged between the axial gap unfilled part of the outer sleeve and the heat conducting pipe;
f) the radial clearance is 0.1mm-5 mm;
further, the material of the heat conducting pipe and the air inlet pipe includes, but is not limited to, steel, aluminum, brass, copper alloy, titanium alloy, or aluminum alloy.
Further, the heat conduction pipe is an external thread pipe.
Further, the heat exchange structure further comprises an insulation resistance wire, the heat conduction pipe is of a hollow structure, and the insulation resistance wire is arranged inside the heat conduction pipe.
Furthermore, the heat exchange structure further comprises an insulation resistance wire, the heat conduction pipe is of a hollow structure, the insulation resistance wire is partially arranged inside the heat conduction pipe, and two ends of the heat conduction pipe are sealed.
Furthermore, at least one turn of separating pipe is arranged on the axial gap, the separating pipe is wound on the heat conduction pipe, and the radial length of the separating pipe is smaller than that of the air inlet pipe.
Further, the separation pipe is an insulated resistance wire, and the insulated resistance wire is wound on the heat conduction pipe.
Furthermore, the separation pipe is a temperature measuring thermocouple wire, and the temperature measuring thermocouple wire is wound on the heat conduction pipe.
Further, the separation pipe is an auxiliary air inlet pipe, and the auxiliary air inlet pipe is wound on the heat conduction pipe.
Further, the axial gap is also provided with at least one turn of auxiliary separation pipe, the auxiliary separation pipe and the separation pipe are coaxially wound on the heat conduction pipe, the radial length of the auxiliary separation pipe is smaller than that of the air inlet pipe, and the auxiliary separation pipe is an insulation resistance wire, a temperature measurement thermocouple wire or an auxiliary air inlet pipe.
The utility model has the advantages and positive effects that: (1) and the double-winding heat exchange design is adopted, the processing technology is simple, and the production cost is reduced.
(2) The radial length of the doubly-wound functional pipe is smaller than that of the air inlet pipe, and the heat exchange space is improved.
(3) The multifunctional functional tubes can be matched for use, so that the heat exchange structure can complete the superposition and the efficiency improvement of various practical functions.
Drawings
FIG. 1 is a schematic view of a cross-section structure A of the heat exchange structure of the present invention
FIG. 2 is a schematic view of the heat exchange structure B of the present invention
FIG. 3 is a schematic diagram of a C-section structure of the heat exchange structure of the present invention
FIG. 4 is a schematic diagram of the heat exchange structure of the present invention with a D-section structure
FIG. 5 is a schematic view of the heat exchange structure of the present invention with an E-section structure
FIG. 6 is a schematic view of the cross-section structure of the heat exchange structure F of the present invention
FIG. 7 is a schematic view of the connection structure between the present invention and J-T
FIG. 8 is a schematic view of the sectional structure of the insulation resistance wire for internal connection of the intake pipe of the present invention
FIG. 9 is a schematic view of a partial cross-sectional structure of a tape probe and a housing according to the present invention
In the figure: 1-heat exchange structure A, 101-first outer sleeve, 102-first heat pipe, 103-first air inlet pipe, 1031-inner insulation resistance wire, 1032-electric wire, 104-axial gap, 105-first air return space, 106-first radial gap, 2-heat exchange structure B, 201-second outer sleeve, 202-second heat pipe, 203-second air inlet pipe, 204-first insulation resistance wire, 205-second air return space, 206-second radial gap, 3-heat exchange structure C, 301-third outer sleeve, 302-third outer sleeve, 303-third air inlet pipe, 304-first separating pipe, 3041-second insulation resistance wire, 305-third air return space, 306-third radial gap, 3061-auxiliary pipe radial gap, 4-heat exchange structure D, 401-fourth outer sleeve, 402-fourth heat pipe, 4021-third insulation resistance wire, 403-fourth air inlet pipe, 404-second separation pipe, 405-fourth air return space, 406-fourth radial gap, 5-heat exchange structure E, 501-fifth outer sleeve, 502-fifth heat pipe, 503-fifth air inlet pipe, 504-auxiliary air inlet pipe, 505-fifth air return space, 506-fifth radial gap, 6-heat exchange structure F, 601-sixth outer sleeve, 602-sixth heat pipe, 603-sixth air inlet pipe, 604-temperature measuring couple, 605-sixth air return space, 606-sixth radial gap, 7-J-T pipe, 8-probe, 9-shell, 901-seventh outer sleeve, 902-seventh heat conduction structure, 903-seventh air inlet pipe, 904-third partition pipe and 905-seventh air return space
Detailed Description
The utility model is used for among the ablation probe device with freezing function, the device generally divide into probe part and handle portion, and the probe part is inside to be equipped with J-T pipe, and handle portion inside is equipped with the intake pipe, and the probe is connected with the grab handle, intake pipe and J-T pipe intercommunication. The utility model discloses the main function that plays is the heat transfer function, and the heat transfer is exactly the step of carrying out the precooling to the fluid that gets into the probe, and general heat transfer function can set up the intake pipe surface in the grab handle. The utility model discloses the optional material of well heat pipe and intake pipe includes silver, steel, aluminium, brass, red copper, copper alloy, titanium alloy or aluminum alloy, the utility model discloses well heat pipe surface does not have the arch, but the same external screw thread pipe of chooseing for use also can accomplish the cost utility model discloses, for example: finned tubes. The utility model discloses well preferred structure has the branch bank of tubes, for guaranteeing heat exchange efficiency, needs corresponding return air space, and the radial length of branch bank of tubes should be less than the radial length of intake pipe, and the radial length of branch bank of tubes is 30% ~ 80% of intake pipe radial length and is optional scope.
For a better understanding of the present invention, the following further description is given in conjunction with the following embodiments and accompanying drawings. It will be apparent, however, to one skilled in the art that the embodiments of the present disclosure may be practiced without these specific details. Furthermore, the particular embodiments of the present disclosure described herein are provided by way of example and should not be used to limit the scope of the present disclosure to these particular embodiments. In other instances, well-known materials, components, processes, controller components, software, circuits, timing diagrams, and/or anatomical structures have not been described or illustrated in detail in order to avoid unnecessarily obscuring the embodiments.
Example 1: referring to fig. 1, fig. 1 is a schematic cross-sectional view of a heat exchange structure a, the heat exchange structure a is disposed inside a first outer sleeve 101 and forms a main air-returning space with the first outer sleeve 101, i.e. a first air-returning space 105, the first air-returning space 105 includes a first axial gap 104 and a first radial gap 106, preferably, the first radial gap 106 is set to 0.1-5mm, the heat exchange structure a includes a first heat conduction pipe 102 and a first air inlet pipe 103, the first heat conduction pipe 102 is a solid pipe to prevent air from returning from the first heat conduction pipe 102 after entering a probe, the first heat conduction pipe 102 can also be a hollow pipe, but both ends of the hollow pipe should be in a sealed state, and the hollow pipe is advantageous in reducing production cost and weight. The first air inlet pipe 103 is wound on the outer surface of the first heat conducting pipe 102, a first axial gap 104 is arranged between two turns of the first heat conducting pipe 102, the first axial gap 104 is set to be 0.1-1mm, and a preferred axial gap is 0.2-0.6mm, in this embodiment, the first axial gap 104 is set to be 0.3mm, the first axial gap 104 is set to make the first air return space 105 have a reasonable space compared with a common structure in which the air inlet pipe is tightly wound or a winding structure which is too loose, because the too large or too small air return space can have negative influence on the heat exchanging effect, referring to fig. 8, fig. 8 is an optimized modification performed inside the first air inlet pipe 103, the first air inlet pipe 103 can be directly electrically heated by means of directly connecting the first air inlet pipe 103 through an internal insulation resistance wire 1031, in order to prevent the first air inlet pipe 103 from being electrically conductive to cause electrification outside, the first inlet pipe 103 is externally provided with an electrically insulating structure/coating, whereby a preheating effect on the first inlet pipe 103 and the internal fluid is achieved.
Example 2: referring to fig. 2, fig. 2 is a schematic sectional view of a heat exchange structure B, which is disposed inside the second outer sleeve 201 and forms a main air return space, i.e., a second air return space 205, with the second outer sleeve 201. The heat exchange structure B comprises a second heat conduction pipe 202, a second air inlet pipe 203 and a first insulation resistance wire 204, the second heat conduction pipe 202 is an internal hollow structure, both ends of the internal hollow structure are sealed structures, the second heat conduction pipe 202 can also be a solid structure, and by adopting the two structures, backflow gas entering the probe can be prevented from flowing back to the grab handle through the second heat conduction pipe 202. The first insulation resistance line 204 mainly functions to include two: the second air inlet pipe 203 is heated to enable the heat exchange structure to have the function of heating/rewarming the inlet air and form an axial gap between two turns of the second air inlet pipe 203, the first insulation resistance wire 204 is wound between the gaps, if the radial length of the first insulation resistance wire 204 does not meet the requirement, the overall radial length is increased by combining a plurality of first insulation resistance wires 204 or increasing the outer skin, the second air inlet pipe 203 and the first insulation resistance wire 204 are wound on the outer surface of the second heat conduction pipe 202 along with the winding, and the mode of naturally forming the axial gap can be processed more conveniently by adopting the mode of relatively leaving the gap in the mode of naturally forming the axial gap along with the winding. Wherein the radial length of the first insulation resistance wire 204 is smaller than that of the second air inlet pipe 203, and due to the design, a second radial gap 206 is formed between the first insulation resistance wire 204 and the second outer sleeve 201, and one of the second radial gaps 206 is preferably designed to be 0.1-5 mm; the axial gap formed between two turns of the second air inlet pipe 203 is formed by the diameter of the first insulation resistance wire 204, the axial gap is set to be 0.1-1mm, a preferable axial gap is 0.2-0.6mm, wherein the axial gap of 0.4mm is selected by the embodiment, the axial gap and the second radial gap 206 together form the second air return space 205, and compared with the common structure of tightly wound air inlet pipes or the loose wound structure, the second air return space 205 has a reasonable space, because the excessively large or small air return space has negative influence on the heat exchange effect. Referring to fig. 4, fig. 4 is a cross-sectional view of a heat exchange structure D, which is different from the heat exchange structure B in that the second heat conductive pipe 202 is replaced by a fourth heat conductive pipe 402, the second gas inlet pipe 203 is replaced by a fourth gas inlet pipe 403, and the first insulation resistance line 204 is replaced by a second separation pipe 404; the fourth heat conduction pipe 402 is a hollow structure, a third insulation resistance wire 4021 is arranged in the fourth heat conduction pipe 402, the fourth heat conduction pipe 402 can be heated by electrifying the third insulation resistance wire 4021, and the fourth air inlet pipe 403 and the internal air are heated by heat conduction to generate a heating/rewarming effect; the second separating tube 404 replaces the first insulation resistance wire 204 to separate every two turns of the fourth gas inlet tube 403, and the material of the second separating tube 404 may be silver, steel, aluminum, brass, red copper, copper alloy, titanium alloy or aluminum alloy. Referring to fig. 5, fig. 5 is a schematic cross-sectional view of a heat exchange structure E, which is different from the heat exchange structure B in that the first insulation resistance wire 204 is replaced by an auxiliary intake pipe 504, and the auxiliary intake pipe 504 is selected to make the utility model lose the heating/rewarming ability, but at the same time, the air input is increased, the increase of the air input can increase the ice ball radial diameter of the cryoablation probe, enhance the ablation effect of the cryoablation probe, and the auxiliary intake pipe 504 is increased while a corresponding J-T pipe is provided to communicate with the J-T pipe, and the implementation mode that two intake pipes are connected with one J-T pipe at the same time can be selected. Referring to fig. 6, fig. 6 is a schematic cross-sectional view of a heat exchange structure F, which is different from the heat exchange structure B in that the first insulation resistance wire 204 is replaced by a temperature measuring couple 604, and the temperature measuring couple 604 is selected to make the utility model lose the heating/rewarming capability, but at the same time, increase the temperature measuring capability.
Example 3: referring to fig. 3, fig. 2 is a schematic cross-sectional view of a heat exchange structure C, the heat exchange structure C is disposed inside the third outer sleeve 301 and forms a main air-returning space, i.e. a third air-returning space 305 with the third outer sleeve 301, the heat exchange structure C includes a third heat pipe 302, a first separating pipe 304 and a second insulating resistance wire 3042, the third heat pipe 302 is a solid pipe to prevent air from flowing back from the third heat pipe 302 after entering the probe, the third heat pipe 302 can also be a hollow pipe, but both ends of the hollow pipe should be sealed, and the hollow pipe is advantageous in reducing production cost and weight. The first separation pipe 304 mainly has the function of forming an axial gap between two turns of the third air inlet pipe 303, the first separation pipe 304 is wound between the gaps, if the radial length of the first separation pipe 304 does not meet the requirement, the overall radial length is increased in a mode of combining a plurality of first separation pipes 304 or increasing outer skins, the third air inlet pipe 303 and the first separation pipe 304 are wound on the outer surface of the third heat-conducting pipe 302 along with the winding, the mode of naturally forming the axial gap can be more convenient to process in a mode of leaving the gap, and the first separation pipe 304 can be replaced by a temperature measuring couple, an insulating resistance wire or an air inlet pipe as an optional structure; the second insulating resistance wire 3042, which is coaxially wound around the third heat pipe 302 with the first separating pipe 304, can also function to naturally form an axial gap between the two turns of the third gas inlet pipe 303, and at the same time, the second insulating resistance wire 3042 can also be replaced by a separating pipe, a temperature measuring couple, or a gas inlet pipe which simply functions as a separation, and the temperature measuring couple can be selected accordingly to enable the heat exchanging structure C to lose the heating/rewarming function and simultaneously obtain the temperature measuring function, and the gas inlet pipe can be selected to enable the heat exchanging structure C to lose the heating/rewarming function and simultaneously obtain a larger gas inflow, embodiment 3 can be regarded as adopting functional pipes with multiple functions to be simultaneously wound around the third heat pipe 302, so that a plurality of functional pipes wound around the third gas inlet pipe 303 are feasible when the axial distance formed between the two turns of the third gas inlet pipe 303 is allowed, and only as a separating pipe, the material of the separating pipe can be silver, steel, aluminum, brass, red copper, copper alloy, titanium alloy or aluminum alloy; it should be noted that, at least one of the radial lengths of the first separation tube 304 and the second insulation resistance wire 3042 should be smaller than that of the third gas inlet tube 303, with this design, the third radial gap 306 and the sub-tube radial gap 3061 formed between the combination of the first separation tube 304 and the second insulation resistance wire 3042 and the 3 rd outer sleeve 301, and one preferable design of the third radial gap 306 and the sub-tube radial gap 3061 is 0.1-5 mm; the axial gap formed between two turns of the third air intake pipe 303 is formed by the diameter of the first separating pipe 304 and the diameter of the second insulated resistance wire 3042, the axial gap is set to be 0.1-1mm, a preferable axial gap is 0.2-0.6mm, wherein the axial gap of 0.5mm is selected by the embodiment, the axial gap, the third radial gap 306 and the radial gap 3061 of the subsidiary organ form the third air return space 305, and the third air return space 305 has a reasonable space compared with the common structure of tightly winding the air intake pipe or the loose winding structure, because the too large or too small air return space has negative influence on the heat exchange effect.
The embodiments of the present invention have been described in detail, but the description is only for the preferred embodiments of the present invention and should not be construed as limiting the scope of the present invention. All equivalent changes and modifications made within the scope of the present invention should be covered by the present patent.
Claims (10)
1. The utility model provides a heat transfer structure for cryoablation probe which characterized in that: comprises an outer sleeve internally provided with
a) A heat conduction pipe concentrically and coaxially arranged;
b) the air inlet pipe is wound on the outer surface of the heat conduction pipe;
c) the winding of the air inlet pipe ensures that an axial gap is formed between every two turns of the air inlet pipe;
d) the axial clearance is 0.1mm-1 mm;
e) a radial gap is arranged between the axial gap unfilled part of the outer sleeve and the heat conducting pipe;
f) the radial clearance is 0.1mm-5 mm.
2. The heat exchange structure of claim 1, wherein: the material of the heat conducting pipe and the air inlet pipe includes, but is not limited to, steel, aluminum, brass, red copper, copper alloy, titanium alloy or aluminum alloy.
3. The heat exchange structure of claim 1, wherein: the heat conduction pipe is an external thread pipe.
4. The heat exchange structure of claim 1, wherein: the heat exchange structure further comprises an insulation resistance wire, the heat conduction pipe is of a hollow structure, the insulation resistance wire is partially arranged in the heat conduction pipe, and two ends of the heat conduction pipe are sealed.
5. The heat exchange structure of claim 1, wherein: the air inlet pipe is internally provided with an insulation resistance wire, one end of the insulation resistance wire is exposed and is electrically connected with the air inlet pipe, and the outer wall of the air inlet pipe is provided with electric insulation.
6. The heat exchange structure according to any one of claims 1 to 5, wherein: the axial gap is provided with a separating pipe, the separating pipe is wound on the heat conduction pipe, and the radial length of the separating pipe is smaller than that of the air inlet pipe.
7. The heat exchange structure of claim 6, wherein: the separation pipe is an insulated resistance wire wound around the heat conductive pipe.
8. The heat exchange structure of claim 6, wherein: the separation pipe is a temperature measuring thermocouple wire, and the temperature measuring thermocouple wire is wound on the heat conduction pipe.
9. The heat exchange structure of claim 6, wherein: the separation pipe is an auxiliary air inlet pipe, and the auxiliary air inlet pipe is wound on the heat conduction pipe.
10. The heat exchange structure of claim 6, wherein: the axial gap is also provided with at least one turn of auxiliary separation pipe, the auxiliary separation pipe and the separation pipe are coaxially wound on the heat conduction pipe, the radial length of the auxiliary separation pipe is smaller than that of the air inlet pipe, and the auxiliary separation pipe is an insulation resistance wire, a temperature measurement thermocouple wire or an auxiliary air inlet pipe.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021380504.8U CN212879550U (en) | 2020-07-14 | 2020-07-14 | Heat exchange structure for cryoablation probe |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202021380504.8U CN212879550U (en) | 2020-07-14 | 2020-07-14 | Heat exchange structure for cryoablation probe |
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| CN212879550U true CN212879550U (en) | 2021-04-06 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113288401A (en) * | 2021-05-26 | 2021-08-24 | 海杰亚（北京）医疗器械有限公司 | Surgical device |
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2020
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113288401A (en) * | 2021-05-26 | 2021-08-24 | 海杰亚（北京）医疗器械有限公司 | Surgical device |
| WO2022246984A1 (en) * | 2021-05-26 | 2022-12-01 | 海杰亚（北京）医疗器械有限公司 | Surgical device |
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