Heat exchange backflow storage device

Abstract

The utility model relates to a heat exchange backflow storage device, and relates to the technical field of ablation. The heat exchange backflow storage device comprises at least one buffering and noise reduction assembly, and each buffering and noise reduction assembly comprises a buffering tank and a multi-stage speed reduction and noise reduction device. The buffer tank can receive the to-be-recycled fluid through the first-stage speed reduction and noise reduction structure, liquid in the to-be-recycled fluid can be temporarily stored in the buffer tank, and therefore the buffer tank does not need to be subjected to active heating expansion operation, and the flow speed of the fluid output to the buffer tank pipe by the first-stage speed reduction and noise reduction structure is reduced; and the gas in the fluid to be recycled passes through the first-stage speed reduction and noise reduction structure and the second-stage speed reduction and noise reduction structure, and the energy of the gas is dissipated, so that the flow velocity is further reduced, the whistling sound in the operation of the low-temperature ablation system can be reduced or eliminated, and the noise is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of ablation, in particular to a heat exchange reflux storage device. Background Art

[0002] During low-temperature ablation, a low-temperature fluid (e.g., liquid nitrogen) is injected into the ablation device for ablation. During high-temperature ablation, a high-temperature fluid (e.g., alcohol) is injected into the ablation device for rewarming. The low-temperature and high-temperature fluids are applied alternately in a designated area.

[0003] After heat exchange, the liquid nitrogen flows out of the return line of the cryogenic ablation system. When the cryogenic fluid flows out of the return line, the liquid nitrogen will vaporize and expand, causing the gas flow rate to be too fast, which easily forms a whistling sound at the outlet of the return line, making it noisy. Utility Model Content

[0004] The utility model provides a heat exchange reflux storage device, which is used to solve at least one of the above technical problems.

[0005] The utility model provides a heat exchange reflux storage device, comprising at least one buffer and silencer component, wherein the buffer and silencer component comprises:

[0006] a buffer tank, wherein an input end of the buffer tank is used to receive the fluid to be recovered; and

[0007] A multi-stage deceleration and silencer device, comprising a first-stage deceleration and silencer structure and a second-stage deceleration and silencer structure, wherein the first-stage deceleration and silencer structure is connected to the input end of the buffer tank;

[0008] The secondary deceleration and silencing structure includes at least one silencer connected to the buffer tank and / or at least one silencer cavity provided in the buffer tank. The silencer or the silencer cavity can change the flow direction of the gas in the buffer tank.

[0009] In one embodiment, the silencer is constructed as a porous bipolar silencer, which includes an inner silencer and an outer silencer arranged outside the inner silencer, the inner silencer has a plurality of first silencer holes, and the outer silencer has a plurality of second silencer holes, wherein the first silencer holes and the second silencer holes are staggered with each other in the circumferential direction, and the first silencer holes and the second silencer holes extend along the radial direction of the buffer tank.

[0010] In one embodiment, the number of the silencers is at least two, wherein a portion of the silencers is connected to the conical bottom of the buffer tank, and another portion of the silencers is connected to the side of the buffer tank.

[0011] In one embodiment, the silencer cavity is provided with a plurality of arc-shaped structures, which are arranged at intervals along the circumference of the silencer cavity, wherein a plurality of third silencer holes are provided on two opposite side walls of the silencer cavity of each arc-shaped structure.

[0012] In one embodiment, the number of the silencing cavities is at least two, and the at least two silencing cavities are spaced apart along the circumference of the buffer tank.

[0013] In one embodiment, the first-stage deceleration and silencer structure includes a silencer pipe, and the silencer pipe is configured as a flared pipe.

[0014] In one embodiment, a recovery tank is further included, wherein the buffer tank and the muffler are both arranged in the recovery tank, or the buffer tank is arranged on the upper side of the recovery tank;

[0015] Wherein, the buffer tank is connected to the recovery tank through the muffler and / or the muffler cavity.

[0016] In one embodiment, the multi-stage deceleration and silencing device further includes a three-stage deceleration and silencing structure, wherein the three-stage deceleration and silencing structure includes a porous silencing plate provided on the upper side of the recovery tank, and the recovery tank is connected to the external environment through the porous silencing plate;

[0017] Among them, the total air outlet area of ​​the porous silencer plate is larger than the total air outlet area of ​​the silencer or the silencer cavity; and the total air outlet area of ​​the silencer or the silencer cavity is larger than the air outlet area of ​​the first-stage deceleration and silencer structure.

[0018] In one embodiment, the porous sound-absorbing plate is obliquely arranged on the upper side of the recovery tank, and a heat-insulating layer is provided on the outer side walls of the recovery tank except the porous sound-absorbing plate.

[0019] In one embodiment, the recovery tank is further provided with a push-pull drain drawer or drain port.

[0020] Compared with the existing technology, the advantage of the present invention is that the buffer tank can accept the fluid to be recovered through the first-stage deceleration and silencer structure, and the liquid in the fluid to be recovered can be temporarily stored in the buffer tank. Therefore, the buffer tank does not need to perform active heating and expansion operations, and the flow rate of the fluid output from the first-stage deceleration and silencer structure to the buffer tank pipe is reduced, and the gas in the fluid to be recovered passes through the first-stage deceleration and silencer structure and the second-stage deceleration and silencer structure, and its energy is dissipated, so that the flow rate is further reduced, which can reduce or eliminate the whistling sound during the operation of the low-temperature ablation system and reduce noise. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The present invention will be described in more detail below based on embodiments with reference to the accompanying drawings.

[0022] Figure 1 This is a front cross-sectional view of the heat exchange reflux storage device in Example 1 of the present utility model;

[0023] Figure 2 This is a side sectional view of the heat exchange reflux storage device in Example 1 of the present utility model;

[0024] Figure 3 This is a front view of the buffer tank in Example 1 of the present utility model;

[0025] Figure 4 yes Figure 3 a cross-sectional view of the buffer tank shown;

[0026] Figure 5 yes Figure 4 Cross-sectional view of the middle muffler;

[0027] Figure 6 This is a schematic diagram of the three-dimensional structure of the heat exchange reflux storage device in Example 2 of the present utility model;

[0028] Figure 7 1 is a top view of the heat exchange reflux storage device in Example 1 of the present utility model;

[0029] Figure 8 yes Figure 6 A side cross-sectional view of the heat exchange reflux storage device is shown;

[0030] Figure 9 yes Figure 8 An enlarged view of the surge tank is shown;

[0031] Figure 10 yes Figure 8 a perspective cutaway view of the buffer tank shown;

[0032] Figure 11 yes Figure 8 A top view of the surge tank is shown.

[0033] Reference numerals:

[0034] 1. Recovery tank; 2. Buffer tank; 3. Speed ​​reduction and silencer;

[0035] 11. Insulation layer; 12. Drain drawer; 13. Drain port; 14. Recovery chamber; 15. Drain valve;

[0036] 31. Muffler; 311. First muffler hole; 312. Second muffler hole; 313. Inner muffler pipe; 314. Outer muffler pipe; 315. Connecting elbow; 316. Connector; 317. Connecting straight pipe;

[0037] 32, muffler cavity; 321, third muffler hole; 322, arc-shaped structure; 3221, first side wall; 3222, second side wall;

[0038] 33. Silencer pipe; 34. Multi-hole silencer plate; 341. Fourth silencer hole. DETAILED DESCRIPTION

[0039] The present invention will be further described below with reference to the accompanying drawings.

[0040] When existing regenerators are connected to the return lines of a cryogenic ablation system to receive cryogenic fluid, they actively heat the liquid nitrogen, causing it to vaporize and expand. This results in excessively high gas flow rates, which can easily generate a whistling sound at the regenerator's outlet, resulting in high noise levels and disrupting the operation of the cryogenic ablation system. Furthermore, existing regenerators utilize a cold storage and heat recovery method, actively heating and vaporizing the liquid nitrogen for discharge, while condensing the alcohol and recovering it in a recovery tank. When the cryogenic ablation system switches from high-temperature to low-temperature operation, the vaporized liquid nitrogen expands in volume, resulting in a high gas volume and high flow rate, which can easily disperse or splash the alcohol in the recovery tank. Furthermore, for cryogenic ablation systems with multiple return lines providing alternating hot and cold outputs, the cryogenic liquid can easily freeze and clog the regenerator, increasing the system's return resistance. Furthermore, existing cold storage regenerators require a certain mass heat capacity, resulting in a heavier heat exchanger per unit of liquid nitrogen discharged, hindering weight reduction.

[0041] To address the aforementioned issues with existing regenerators, the present invention provides a heat exchange reflux storage device comprising at least one buffer and silencer assembly, the buffer and silencer assembly comprising a buffer tank 2 and a deceleration and silencer device 3. The input end of the buffer tank 2 is configured to receive a fluid to be recovered. The recovered fluid may be, for example, a fluid from a cryogenic ablation system that has undergone low-temperature operation (including liquid nitrogen, nitrogen gas, or a gas-liquid two-phase flow of liquid nitrogen and nitrogen gas), or a fluid that has undergone high-temperature operation (including alcohol or alcohol vapor).

[0042] The multi-stage deceleration and silencing device 3 includes a first-stage deceleration and silencing structure and a second-stage deceleration and silencing structure. The first-stage deceleration and silencing structure is respectively connected to the low-temperature ablation system (specifically, the return line of the low-temperature ablation system) and the input end of the buffer tank 2. The fluid in the low-temperature ablation system that has undergone low-temperature operation enters the buffer tank 2 through the first-stage deceleration and silencing structure.

[0043] The secondary deceleration and silencing device 3 includes at least one silencer 31 connected to the buffer tank 2 and / or at least one silencer cavity 32 arranged in the buffer tank 2. The silencer 31 or the silencer cavity 32 can change the flow direction of the gas in the buffer tank 2.

[0044] When the fluid to be recovered enters the buffer tank 2 through the first-stage deceleration and silencing structure, first-stage deceleration and silencing can be performed. For example, when nitrogen enters the buffer tank 2 through the first-stage deceleration and silencing structure, its volume expands and its flow rate decreases, thereby achieving the purpose of first-stage deceleration and silencing. The fluid in the buffer tank 2 flows to the outside of the buffer tank 2 through the silencer 31 and / or the silencer chamber 32, thereby performing second-stage deceleration and silencing. For example, when nitrogen passes through the silencer 31 and / or the silencer chamber 32, the airflow direction is changed, the energy carried by the gas is consumed, and its speed is further reduced, thereby achieving the purpose of second-stage deceleration and silencing.

[0045] Therefore, the speed of the fluid to be recovered, such as high-speed nitrogen, can be reduced by the multi-stage deceleration and silencing device 3, thereby eliminating the whistling sound generated when the nitrogen flows out at high speed and reducing the noise of the equipment.

[0046] Example 1

[0047] like Figure 1-Figure 5 As shown, in this embodiment 1, the heat exchange reflux storage device further includes a recovery tank 1 having a recovery chamber 14, and the secondary deceleration and silencer structure includes at least one muffler 31 connected to the buffer tank 2. The buffer tank 2 and the muffler 31 are both arranged in the recovery chamber 14.

[0048] Specifically, the silencer 31 is constructed as a porous bipolar silencer, which includes an inner layer silencer and an outer layer silencer arranged outside the inner layer silencer. Figure 3 、 Figure 4 and Figure 5 As shown, the inner muffler includes an inner muffler pipe 313, a plurality of first muffler holes 311 being provided on the sidewall of the inner muffler pipe 313, and the plurality of first muffler holes 311 being spaced apart along the axial direction and circumferential direction of the inner muffler pipe 313. The outer muffler includes an outer muffler pipe 314, a plurality of second muffler holes 312 being provided on the sidewall of the outer muffler pipe 314, and the second muffler holes 312 being spaced apart along the axial direction and circumferential direction of the outer muffler pipe 314.

[0049] like Figure 5 As shown, the first silencer holes 311 and the second silencer holes 312 are staggered in the circumferential direction, so that the fluid in the buffer tank 2 can flow into the first silencer holes 311 and collide between the outer wall of the inner silencer and the inner wall of the outer silencer, causing the energy it carries to be lost and the speed to be greatly reduced, and then flowing out from the second silencer holes 312. In addition, the first silencer holes 311 and the second silencer holes 312 extend in the radial direction of the buffer tank 2. In other words, the gas flowing out of the second silencer holes 312 flows toward the inner wall of the recovery tank 1. Since the volume of the recovery chamber 14 of the recovery tank 1 is larger than that of the buffer tank 2, the flow rate of the gas flowing out of the buffer tank 2 into the recovery chamber 14 is further reduced.

[0050] like Figure 4 and Figure 5 As shown, the silencer 31 (multi-hole bipolar silencer) further includes a connecting elbow 315 and a connector 316. One end of the connector 316 is inserted between the inner silencer pipe 313 and the outer silencer pipe 314 and connected to the two. The other end of the connector 316 is connected to the connecting elbow 315. The connecting elbow 315 can be connected to the side of the buffer tank 2. Figure 2 As shown, the flow direction of the gas can be changed through the connecting elbow 315. The bending angle of the connecting elbow 315 is approximately 90 degrees, so that the axial directions of the inner layer silencer pipe 313 and the outer layer silencer pipe 314 are consistent with the axial direction of the buffer tank 2.

[0051] It is understandable that the connecting elbow 315 can be replaced by a connecting straight pipe 317 , which can be connected to the bottom of the buffer tank 2 to facilitate the outflow of gas and liquid at the bottom of the buffer tank 2 .

[0052] like Figure 1 and Figure 4 As shown, the first-stage deceleration and silencing structure includes a silencer pipe 33 connected to the input end of the buffer tank 2. The silencer pipe 33 is constructed as a flared pipe, that is, the pipe opening of the silencer pipe 33 on the side facing the inside of the buffer tank 2 is larger and presents a trumpet shape, so that the fluid entering the buffer tank 2 from the silencer pipe 33 can be dispersed in all directions inside the buffer tank 2, avoiding the fluid directly impacting the bottom wall of the buffer tank 2.

[0053] Furthermore, the multi-stage deceleration and silencing device 3 also includes a three-stage deceleration and silencing structure, and the three-stage deceleration and silencing structure also includes a porous silencing plate 34 arranged on the upper side of the recovery tank 1. The recovery tank 1 is connected to the external environment through the porous silencing plate 34, so the gas in the recovery tank 1 can be discharged from the porous silencing plate 34 to the external environment, thereby realizing three-stage deceleration and silencing, thereby fully eliminating the whistling sound generated by the high-speed outflow of nitrogen in the low-temperature ablation system and reducing noise.

[0054] like Figure 1 As shown, the porous muffler plate 34 includes a plurality of fourth muffler holes 341. The diameter of the fourth muffler holes 341 can be set larger, for example, larger than the diameter of each first muffler hole 311 and each second muffler hole 312. The fourth muffler holes 341 can ensure that the gas is discharged from the recovery tank 1 more smoothly.

[0055] In this embodiment 1, the porous sound-absorbing plate 34 can be provided on one side (eg, the back side) of the recovery tank 1 , or the porous sound-absorbing plate 34 can be provided on both the front side and the back side of the recovery tank 1 .

[0056] As described above, when the fluid to be recovered discharged from the low-temperature ablation system enters the buffer tank 2 through the silencer pipe 33, the gas entering the buffer tank 2 expands and the flow rate decreases due to the larger volume of the buffer tank 2, thus achieving the first stage of deceleration and silencing; the gas entering the buffer tank 2 can flow into the recovery chamber 14 through the silencer 31, and the liquid entering the buffer tank 2 can be retained in the buffer tank first; when the gas enters the silencer 31, it collides with the inner wall of the inner silencer pipe 313 and the outer silencer pipe 314, and the energy it carries is further lost, thereby further reducing its flow rate and being discharged from the second silencer hole 312 to the recovery chamber 14, thus achieving the second stage of deceleration and silencing; the gas entering the recovery chamber 14 can be discharged to the external environment through the porous silencer plate 34, thus achieving the third stage of deceleration and silencing. Therefore, through the above-mentioned three-stage deceleration and silencing, the flow rate of the fluid discharged from the low-temperature ablation system can be effectively reduced to reduce noise.

[0057] As the cryogenic ablation system continues to operate at low temperatures, the various pipelines of the cryogenic ablation system gradually cool down. Therefore, low-temperature nitrogen and liquid nitrogen are discharged from the return pipeline of the cryogenic ablation system, the airflow density gradually increases, and the flow rate slows down, so the airflow outflowing from the deceleration and silencing structures at each level also gradually slows down.

[0058] In this embodiment 1, the low-temperature gas and liquid nitrogen entering the buffer tank 2 through the first-stage deceleration and silencing structure or lowering the temperature of the buffer tank 2 allows some liquid nitrogen to remain in the buffer tank 2; the vaporized cold nitrogen can be discharged from the second silencing hole 312. As the low-temperature ablation system gradually cools down, the density of the gas-liquid two-phase flow output to the first-stage deceleration and silencing structure is higher, and the flow rate is lower, so that the noise at the first-stage deceleration and silencing structure can be gradually reduced until there is no noise. The liquid nitrogen that can be retained in the buffer tank 2 can first be stored in the buffer tank 2, and then overflow from the outlet at the bottom of the buffer tank 2 and flow into the recovery chamber 14.

[0059] Therefore, compared with existing instant heat exchange regenerators, the heat exchange reflux storage device of the present invention does not produce the "white smoke" phenomenon. Because existing instant heat exchange regenerators need to absorb a large amount of heat to balance the cold energy of the liquid nitrogen discharged from the cryogenic ablation system during low-temperature operation, during the later stages of low-temperature operation with frequent output from the cryogenic ablation system, the reflux end of the ablation device will discharge liquid nitrogen, resulting in cold energy accumulation. Since the regenerator uses an instant heat exchange method, the liquid nitrogen in the regenerator is completely vaporized, causing a large flow of cold air to be discharged from the exhaust port of the regenerator. This high flow of cold air will form the "white smoke" phenomenon, which is not conducive to the implementation of the cryogenic ablation operation. The heat exchange reflux storage device of the present invention adopts a non-instantaneous heat exchange form. In the early low-temperature operation of the low-temperature ablation system, since the flow rate of the discharged liquid is not large, the exhaust volume of the heat exchange reflux storage device is not large, and white smoke will not be formed at this time; and even in the later low-temperature operation of the low-temperature ablation system with frequent output, since the heat exchange reflux storage device of the present invention is provided with a buffer tank 2, the liquid nitrogen discharged from the low-temperature ablation system to the heat exchange reflux storage device of the present invention is not completely heat-exchanged and vaporized, and the incompletely vaporized liquid nitrogen is stored in the buffer tank 2 in the form of liquid, and the gas after heat exchange vaporization is discharged into the recovery chamber 14 through the second silencer hole 312, thereby avoiding the concentrated discharge of large-flow cold air to form the "white smoke" phenomenon; in addition, after the first and second stage deceleration and silencer, the amount of nitrogen discharged from the porous silencer 34 is also small, and the "white smoke" phenomenon will not be formed, and it can carry a larger cooling load, so that more liquid nitrogen can be stored in the recovery chamber 14.

[0060] Another function of the buffer tank 2 and the recovery tank 1 is that when the ablation instrument of the low-temperature ablation system inputs low-temperature fluid (liquid nitrogen, nitrogen gas) into the buffer tank 2 (and the recovery tank 1) through the first-stage deceleration and silencer structure, the buffer tank 2 and the recovery tank 1 will be cooled, and a small amount of liquid nitrogen that has not undergone heat exchange will remain in the recovery chamber 14 of the recovery tank 1; then after the low-temperature ablation system switches to high-temperature operation, when its ablation instrument inputs high-temperature fluid (alcohol) into the buffer tank 2 (and the recovery tank 1) through the first-stage deceleration and silencer structure, the buffer tank 2 (and the recovery tank 1) can also cool down and condense the alcohol vapor, thereby preventing the alcohol vapor from escaping or splashing, thereby improving the environment for low-temperature operation. Conversely, when the low-temperature ablation system switches from high-temperature operation to low-temperature operation, the alcohol liquid stored in the buffer tank 2 (and the recovery tank 1) can also partially absorb the coldness of the liquid nitrogen, thereby accelerating the vaporization of the liquid nitrogen.

[0061] When the cryogenic ablation system switches between high-temperature operation and low-temperature operation, such as switching the low-temperature operation to the high-temperature operation, the cold valve of the cryogenic ablation system can be opened intermittently (for example, opened intermittently twice) to make the cryogenic ablation system output a pressurized fluid. Therefore, under the action of pressure, the liquid nitrogen in the buffer tank 2 can be discharged from the silencer 31 at the bottom thereof; then the cryogenic ablation system starts to output alcohol vapor again, and the buffer tank 2 can start to collect the alcohol outputted by the return line of the cryogenic ablation system. Since the buffer tank 2 has been simply cooled when collecting the liquid nitrogen, it can condense the alcohol vapor when collecting the alcohol, and the condensed alcohol can be discharged into the recovery chamber 14 along the silencer 31 at the bottom of the buffer tank 2.

[0062] In addition, the bottom of the recovery tank 1 is provided with a drain port 13, and a drain valve 15 is provided on the drain port 13. If the liquid nitrogen capacity in the recovery chamber 14 is large, the drain valve 15 at the bottom of the recovery tank 1 can be opened, and the liquid nitrogen can be discharged from the drain port 13. The discharged liquid nitrogen can also be recycled and reused.

[0063] In addition, when the recovery tank 1 recovers alcohol, the alcohol can also be discharged through the drain port 13.

[0064] There are at least two silencers 31, wherein a portion of the silencers 31 is connected to the conical bottom of the buffer tank 2, and another portion of the silencers 31 is connected to the side of the buffer tank 2. Figure 1 As shown, four silencers 31 are connected to the side of the buffer tank 2. The silencers 31 on the side of the buffer tank 2 can improve the smoothness of gas outlet, reduce air resistance, and can exhaust gas more promptly, thereby reducing gas flow rate and noise. A silencer 31 is connected to the conical bottom of the buffer tank 2. The silencer 31 at the conical bottom of the buffer tank 2 can facilitate exhaust during the early operation of the low-temperature ablation system. During the later operation of the low-temperature ablation system, since the buffer tank 2 can temporarily store a portion of liquid nitrogen that has not undergone heat exchange, the liquid nitrogen can be discharged into the recovery chamber 14 through the silencer 31 at the conical bottom of the buffer tank 2.

[0065] like Figure 2 As shown, the muffler 31 connected to the side of the buffer tank 2 is connected to the side wall of the buffer tank 2 through a bend pipe, so the gas in the buffer tank 2 is discharged along the Figure 2 As shown by the middle arrow, the gas flows into the muffler 31 connected to the side of the buffer tank 2 and is discharged into the recovery chamber 14 of the recovery tank 1 along the direction toward the side wall of the recovery tank 1, and the flow direction of the gas in the buffer tank 2 is changed; similarly, the gas or liquid in the buffer tank 2 can also enter the muffler 31 connected to the conical bottom of the buffer tank 2 and be discharged into the recovery chamber 14 of the recovery tank 1 along the direction toward the side wall of the recovery tank 1, and the flow direction of the gas in the buffer tank 2 is changed.

[0066] In order to prevent the outer wall of the recovery tank 1 from cooling and condensing, which may cause condensed water to drip, an insulation layer 11 is provided on the outside of the recovery tank 1. Figure 2 As shown, the porous muffler plate 34 is tilted and disposed on the upper side of the recovery tank 1. Therefore, it is understandable that the insulation layer 11 should be located on the outer wall of the recovery tank 1 other than the porous muffler plate 34. Therefore, the recovery tank 1 can gradually exchange heat with the external components through the insulation layer 11, gradually evaporating the liquid nitrogen inside.

[0067] The total outlet area of ​​the porous muffler plate 34 (i.e., the sum of the inner surface areas of all the muffler holes on the porous muffler plate 34) is greater than the total outlet area of ​​the muffler 31 or muffler cavity 32 (i.e., the sum of the inner surface areas of all the muffler holes in the muffler 31 or muffler cavity 32); and the total outlet area of ​​the muffler 31 or muffler cavity 32 is greater than the outlet area of ​​the first-stage deceleration and muffler structure (i.e., the inner surface area of ​​the muffler pipe 33). In other words, the area of ​​gas passing through the first-stage deceleration and muffler structure (muffler pipe 33), the second-stage deceleration and muffler structure (muffler 31 or muffler cavity 32), and the third-stage deceleration and muffler structure (porous muffler plate 34) increases step by step, thereby improving the overall deceleration and muffler effect.

[0068] In this embodiment 1, a recovery tank 1 can be provided, which can accommodate multiple independent buffer silencer components, such as Figure 1 As shown, the recovery tank 1 contains four buffer silencer assemblies (i.e., four buffer tanks 2). Therefore, each buffer tank 2 can be individually connected to a return line of the low-temperature ablation system. Since the buffer tanks 2 are independent of each other, when the low-temperature ablation system adopts multi-channel output, the cold and hot outputs will not affect each other. In other words, multiple return lines of the low-temperature ablation system can output low-temperature fluid and high-temperature fluid at the same time, or multiple return lines can output at different times, which will not increase the return resistance and will not cause ice blockage caused by the simultaneous output of cold and hot circuits. Therefore, the heat exchange reflux storage device of the present invention does not need to consider the influence of cold and heat balance, and can continuously recover high-temperature fluid and low-temperature fluid, thereby extending its continuous use time and increasing its use efficiency.

[0069] The buffer tank 2 can be set in the reflux tank 1 through a bracket, and the support of the bracket and the first-stage deceleration and silencer structure can reduce resonance.

[0070] Example 2

[0071] like Figures 6-11 As shown, in this embodiment 2, what is different from the above-mentioned embodiment 1 is that the two-stage deceleration and silencing structure includes a silencing cavity 32 in the buffer tank 2.

[0072] like Figure 8 、 Figure 9 and Figure 10As shown, the muffler cavity 32 is the internal cavity of the buffer tank 2, and a plurality of arc-shaped structures 322 are provided in the muffler cavity 32. The arc-shaped structures 322 can be, for example, arc-shaped columns. Figure 11 As shown, a plurality of arc-shaped structures 322 are spaced apart in the circumferential direction of the muffler chamber 32 and are radially arranged. Figure 11 As shown, the inner ends of the multiple arc-shaped structures 322 are all located on a circle with the center of the silencer cavity 32 as the center. The multiple arc-shaped structures 322 can guide the gas in the silencer cavity 32 to form a spiral airflow, thereby changing the flow direction of the gas in the buffer tank 2.

[0073] like Figure 11 As shown, the radial cross-section of the arc-shaped structure 322 is constructed to be a structure in which the end toward the center of the silencer chamber 32 is small and the end away from the center of the silencer chamber 32 is large, and the two ends are transitioned through an arc-shaped profile, so the radial cross-section of the arc-shaped structure 322 is petal-shaped or leaf-shaped.

[0074] like Figure 9 As shown, each arc-shaped structure 322 is configured to extend from the bottom wall of the buffer tank 2 along the height direction of the buffer tank 2. The arc-shaped structure 322 is configured as a hollow structure, with its upper end being a closed end and its lower end being an open end. Figure 9 As shown, the two opposite side walls (eg Figure 11 The first side wall 3221 and the second side wall 3222 shown are both provided with a plurality of third muffler holes 321. The airflow in the muffler cavity 32 can collide with the side wall of the arc-shaped structure 322 and enter the interior thereof from the third muffler holes 321 on one side thereof, and eject from the third muffler holes 321 on the other side thereof, or flow out from the open end at the bottom thereof. Therefore, the third muffler holes 321 on the two opposite side walls of the arc-shaped structure 322 can be arranged in a non-aligned structural form. Figure 11 As shown, the third muffler holes 321 on the first side wall 3221 and the third muffler holes 321 on the second side wall 3222 can be misaligned or mismatched in one or more of the radial, axial, and circumferential directions to increase the wear and collision between the airflow and the arc-shaped structures 322, thereby consuming the energy carried by the airflow. The third muffler holes 321 on adjacent arc-shaped structures 322 can be aligned or misaligned with each other.

[0075] like Figure 9 and Figure 10 As shown, multiple rows of third silencer holes 321 can be set along the height direction of the arc-shaped structure 322, preferably 3 layers or more, so that the airflow can be fully dispersed; and multiple third silencer holes 321 can also be set along the radial direction of the arc-shaped structure 322.

[0076] like Figure 9As shown, the bottom end of the silencer pipe 33 can be set at a position slightly higher than the upper end of the arc-shaped structure 322. The bottom end of the silencer pipe 33 should not enter too deep into the buffer tank 2 to avoid affecting the diversion effect of the arc-shaped structure 322.

[0077] like Figure 8 As shown, the gas in the buffer tank 2 can flow along Figure 8 The dotted arrows shown flow in the muffler chamber 32 to dissipate energy and enter the recovery tank 1 from the bottom of the buffer tank 2 (the open end of the bottom of the arc-shaped structure 322). The gas in the recovery tank 1 flows from top to bottom, turns back at the bottom, and flows upward through the porous muffler plate 34 to the external environment.

[0078] The silencer cavity 32 and the arc-shaped structure 322 in the buffer tank 2 can be formed by 3D printing or casting. Figure 10 As shown, for the convenience of molding, the buffer tank 2 can be constructed as a split structure including an upper shell and a lower shell. The arc-shaped structure 322 can extend upward from the bottom wall of the lower shell, and a silencer chamber 32 is formed inside the upper shell and the lower shell after being buckled together.

[0079] like Figure 7 As shown, the three-stage deceleration and silencer structure (porous silencer plate 34) can be arranged in the same manner as in the above-mentioned embodiment 1, which will not be described in detail.

[0080] In this embodiment 2, since the secondary deceleration and silencing structure is placed inside the buffer tank 2, it is beneficial to the miniaturization and lightness of the entire device. The buffer tank 2 can be placed on the upper side of the recovery tank 1, and the recovery chamber of the recovery tank 1 can be set as a push-pull drain drawer 12, such as Figure 6 and Figure 8 As shown, the drain drawer 12 can be pulled out from the side of the recovery tank 1 so as to collect the liquid nitrogen and alcohol in the recovery tank 1 .

[0081] In this embodiment 2, the number of recovery tanks 1 and buffer silencer components can be the same, and a buffer silencer component (buffer tank 2) can be set on the upper side of each recovery tank 1. Figure 6As shown, there are four recovery tanks 1 and four buffer silencer components (i.e., buffer tanks 2). Therefore, each buffer tank 2 and recovery tank 1 can be separately connected to a return line of the low-temperature ablation system. Since the buffer tank 2 and the recovery tank 1 are independent of each other, when the low-temperature ablation system adopts multi-channel output, the cold and hot outputs will not affect each other. In other words, the multiple return lines of the low-temperature ablation system can output low-temperature fluid and high-temperature fluid at the same time, or the multiple return lines can output at different times without interfering with the return thermal resistance, and there will be no ice blockage caused by the simultaneous output of the cold and hot circuits. Therefore, the heat exchange reflux storage device of the present invention does not need to consider the influence of the cold and heat balance, and can continuously recover high-temperature fluid and low-temperature fluid, thereby extending its continuous use time and increasing its use efficiency.

[0082] The buffer tank 2 can be arranged on the upper side of the reflux tank 1 through a bracket, and can reduce resonance through the support of the bracket and the first-stage deceleration and silencer structure.

[0083] The similarities between this embodiment 2 and the above embodiment 1 will not be repeated.

[0084] It should be noted that the low-temperature ablation system described in the present invention may be, for example, the ablation system disclosed in CN115349941A, and the ablation instrument may be, for example, an ablation needle or ablation forceps.

[0085] To sum up, the heat exchange reflux storage device of the present invention does not perform active heating and expansion operations when receiving the low-temperature fluid discharged from the low-temperature ablation system, but temporarily stores the liquid nitrogen in the buffer tank 2 and reduces the flow rate of the gas through a multi-stage deceleration and silencer device, thereby reducing or eliminating the whistling sound and reducing noise during the operation of the low-temperature ablation system.

[0086] In addition, since the heat exchange reflux storage device of the present invention does not require complete heat exchange of the liquid nitrogen, the reflux thermal resistance is small, which is beneficial to improving the cooling speed of the low-temperature ablation system.

[0087] The heat exchange reflux storage device of the present invention does not require active heating operation, so it does not require a large mass heat capacity, which is conducive to the miniaturization and lightness of the device. The heat exchange reflux storage device of the present invention also has the advantages of simple overall structure and light weight.

[0088] While the present invention has been described with reference to preferred embodiments, various modifications may be made and equivalent components may be substituted without departing from the scope of the present invention. In particular, the various technical features described in the various embodiments may be combined in any manner, provided no structural conflicts exist. The present invention is not limited to the specific embodiments disclosed herein, but encompasses all technical solutions within the scope of the claims.

Claims

1. A heat exchange reflux storage device, characterized in that: The invention comprises at least one buffer and sound-absorbing component, wherein the buffer and sound-absorbing component comprises: A buffer tank (2), the input end of the buffer tank (2) is used to receive the fluid to be recovered; and A multi-stage deceleration and silencer device (3), the multi-stage deceleration and silencer device (3) comprising a primary deceleration and silencer structure and a secondary deceleration and silencer structure, the primary deceleration and silencer structure being connected to the input end of the buffer tank (2); The secondary deceleration and silencing structure comprises at least one silencer (31) connected to the buffer tank (2) and / or at least one silencer chamber (32) arranged in the buffer tank (2); the silencer (31) or the silencer chamber (32) can change the flow direction of the gas in the buffer tank (2).

2. The heat exchange reflux storage device according to claim 1, characterized in that: The muffler (31) is constructed as a porous bipolar muffler, comprising an inner muffler and an outer muffler arranged outside the inner muffler, the inner muffler having a plurality of first muffler holes (311), and the outer muffler having a plurality of second muffler holes (312), wherein each first muffler hole (311) and each second muffler hole (312) are staggered with each other in the circumferential direction, and each first muffler hole (311) and each second muffler hole (312) extend in the radial direction of the buffer tank (2).

3. The heat exchange reflux storage device according to claim 1 or 2, characterized in that: The number of the silencers (31) is at least two, wherein a portion of the silencers (31) is connected to the conical bottom of the buffer tank (2), and another portion of the silencers (31) is connected to the side of the buffer tank (2).

4. The heat exchange reflux storage device according to claim 1, characterized in that: A plurality of arc-shaped structures (322) are arranged in the muffler cavity (32), and the plurality of arc-shaped structures (322) are arranged at intervals along the circumference of the muffler cavity (32), wherein a plurality of third muffler holes (321) are arranged on two opposite side walls of each of the arc-shaped structures (322).

5. The heat exchange reflux storage device according to claim 4, characterized in that: The number of the silencing chambers (32) is at least two, and at least two of the silencing chambers (32) are arranged at intervals along the circumference of the buffer tank (2).

6. The heat exchange reflux storage device according to claim 1, characterized in that: The first-stage deceleration and silencer structure comprises a silencer pipe (33), and the silencer pipe (33) is configured as a flared pipe.

7. The heat exchange reflux storage device according to claim 1, characterized in that: It also comprises a recovery tank (1), wherein the buffer tank (2) and the muffler (31) are both arranged in the recovery tank (1), or the buffer tank (2) is arranged on the upper side of the recovery tank (1); Wherein, the buffer tank (2) is connected to the recovery tank (1) via the muffler (31) and / or the muffler chamber (32).

8. The heat exchange reflux storage device according to claim 7, characterized in that: The multi-stage deceleration and silencing device (3) further comprises a three-stage deceleration and silencing structure, wherein the three-stage deceleration and silencing structure comprises a porous silencing plate (34) arranged on the upper side of the recovery tank (1), and the recovery tank (1) is connected to the external environment through the porous silencing plate (34); Wherein, the total air outlet area of ​​the porous silencer plate (34) is greater than the total air outlet area of ​​the silencer (31) or the silencer chamber (32); and the total air outlet area of ​​the silencer (31) or the silencer chamber (32) is greater than the air outlet area of ​​the first-stage deceleration and silencer structure.

9. The heat exchange reflux storage device according to claim 8, characterized in that: The porous sound-absorbing plate (34) is arranged obliquely on the upper side of the recovery tank (1), and a heat-insulating layer (11) is arranged on the outer side walls of the recovery tank (1) except for the porous sound-absorbing plate (34).

10. The heat exchange reflux storage device according to claim 7, characterized in that: The recovery tank (1) is also provided with a push-pull liquid drain drawer (12) or a liquid drain port (13).

Images