Dry-type plasma thawing device

Abstract

The invention relates to the technical field of plasma thawing devices, and discloses a dry-type plasma thawing device which comprises a device body, the device body comprises a thawing box, a water tank is installed in the thawing box, a partition plate is installed in the water tank, multiple sets of through grooves communicated with the interior of the water tank are formed in the partition plate, and flexible storage bags are installed in the through grooves; and the kneading unit comprises a second connecting shaft connected to the limiting frame through a bearing, multiple sets of cam columns used for driving the kneading action are installed on the second connecting shaft, cam grooves are formed in the two sides of the outer portion of each cam column, and sliding rods are slidably connected into the cam grooves. The kneading unit can periodically and uniformly knead the blood plasma in the bag in a full-length manner to break a local low-temperature area, and the kneading force is gradually changed by virtue of the elastic buffering of the spring to protect the blood plasma bag and active ingredients; the problems that the outer layer is overheated, the inner layer is not melted and a local low-temperature area in the bag cannot be eliminated due to poor plasma heat conduction are solved.

Description

Technical Field

[0001] This invention relates to the field of plasma thawing apparatus technology, and more specifically, to a dry plasma thawing apparatus. Background Technology

[0002] Dry plasma thawing devices are indispensable medical equipment in clinical blood transfusion therapy. Their core function is to rapidly and uniformly thaw frozen plasma within a safe temperature range of 37-40℃, ensuring that active plasma components, such as coagulation factors and albumin, are not destroyed, while also meeting the need for rapid blood supply during emergency transfusions.

[0003] Currently, most dry plasma thawing devices on the market are static immersion thawing devices. Their structure includes a thawing chamber, a water tank, and a plasma bag rack. During operation, frozen plasma bags are placed in the immersion area of ​​the water tank, where heat exchange occurs through a heated medium. However, in use, the plasma bags are statically placed on the rack, with contact with the thawing medium limited to a small area on the bottom or sides of the bag. The top and corners are often in light contact or semi-suspended, failing to effectively absorb heat from the medium. More importantly, after contact with the medium, the plasma rapidly cools due to its low temperature, forming a low-temperature adhesion layer on the bag surface. This layer cannot circulate and exchange heat with the high-temperature medium in the water tank, becoming a barrier to heat conduction and significantly reducing heat exchange efficiency.

[0004] Because plasma has an extremely low thermal conductivity, heat transfer within the plasma bag during static immersion relies entirely on its own thermal conductivity. This easily leads to a temperature gradient difference between the overheated outer layer and the unthawed inner layer. To shorten the thawing time, some devices are forced to increase the medium temperature, causing the outer layer temperature of the plasma bag to rise rapidly to above 42°C, which can cause heat-sensitive components such as coagulation factor VIII to denature and become inactive. Even if the outer plasma thaws, the central area of ​​the bag may still remain frozen at -5°C to 0°C. If forced infusion is performed, the unmelted ice crystals can block the infusion lines and even trigger a hemolytic reaction. Summary of the Invention

[0005] This invention provides a dry plasma thawing device, which solves the technical problem in related static immersion thawing devices where, during use, the plasma bag is in a static state on the rack, and the contact with the thawing medium is limited to a local area at the bottom or side of the bag, while the top, corners, and other parts of the bag are mostly in light contact or semi-suspended, making it impossible to effectively obtain heat from the medium.

[0006] The present invention provides a dry plasma thawing device, comprising a device body, the device body including a thawing box, a water tank installed inside the thawing box, a partition installed inside the water tank, and multiple sets of through slots connected to the inside of the water tank opened on the partition, and flexible storage bags installed in the through slots. The swing unit includes symmetrically arranged limiting members on both sides inside the water tank. The limiting members are used to laterally limit the flexible storage bag and drive it to swing back and forth. Each set of limiting members includes two sets of limiting frames. Between the two sets of limiting frames, there are multiple sets of limiting rods for squeezing the flexible storage bag, and the limiting rods are correspondingly arranged on both sides of the multiple sets of flexible storage bags. Through the coordinated kneading of the limiting rods on both sides, the plasma in the flexible storage bag is fully turned over, avoiding uneven thawing caused by local low temperature of the plasma. The kneading unit includes a second connecting shaft connected to the limiting frame by a bearing, and multiple sets of cam columns for driving the kneading action are installed on the second connecting shaft. Cam grooves are provided on both sides of the outer side of the cam columns, and slide rods are slidably connected inside the cam grooves and installed at both ends of the limiting rod.

[0007] As a further optimization of the present invention, the cam groove is elliptical in shape; when the cam column drives the cam groove to rotate one revolution, the slide rod moves back and forth along the elliptical trajectory inside the cam groove to drive the limiting rod to periodically approach or move away from the flexible storage bag, thereby achieving uniform kneading of the plasma and avoiding excessively rapid local thawing.

[0008] As a further optimization of the present invention, a spline shaft is provided inside the second connecting shaft, and the two ends of the spline shaft are connected to the inner wall bearing of the water tank. A keyway adapted to the spline shaft is opened inside the second connecting shaft, and the spline shaft and the keyway are slidably connected.

[0009] As a further optimization of the present invention, the limiting frame has multiple sets of second sliding grooves inside, and each set of second sliding grooves has a slider symmetrically slidably arranged inside. The slider is installed at both ends of the limiting rod to limit the movement trajectory of the slider through the second sliding grooves, so as to ensure that the kneading action of the limiting rod on the flexible storage bag is stable and controllable.

[0010] As a further optimization of the present invention, a spring is installed between the two sets of sliders inside the same second groove; the spring, through its elastic restoring action, ensures that the two sliders always maintain elastic support for the limiting rod, preventing the limiting rod from detaching from the flexible storage bag due to excessive movement, while also buffering the impact force on the plasma during the kneading process.

[0011] As a further optimization of the present invention, a reciprocating rod is provided on the side of the limiting frame that is far away from each other, and a bushing is slidably connected to the outside of the reciprocating rod. The bushing is rotatably connected to the limiting frame through a bearing. Gears are also installed on the outside of the second connecting shaft and the bushing, and the gears are meshed together. The reciprocating rod is fixedly connected to the inner wall of the water tank.

[0012] As a further optimization of the present invention, multiple sets of spiral grooves are formed in a ring on the outer surface of the reciprocating rod and the inner wall of the bushing. The protruding part of the groove on the reciprocating rod is adapted to the concave part of the groove on the bushing. When the bushing moves outside the reciprocating rod, the protruding part and the concave part of the groove squeeze each other, driving the bushing to rotate, providing rotational driving force for the gear to transmit power, and ensuring that the kneading action and the swinging action are synchronized and coordinated.

[0013] As a further optimization of the present invention, a connecting block is installed between each pair of adjacent limiting frames, and a swing frame for driving the flexible storage bag to swing back and forth is installed on one of the connecting blocks. A motor is also installed inside the defrosting box, and an eccentric wheel is installed through the water tank of the motor. A first connecting shaft is installed on the eccentric wheel.

[0014] As a further optimization of the present invention, the swing frame has a first sliding groove inside, and the first connecting shaft is slidably connected to the first sliding groove; the motor drives the eccentric wheel to rotate, so that the first connecting shaft slides along the first sliding groove and drives the swing frame to swing back and forth, thereby driving the flexible storage bag to fully contact the thawing medium and accelerate heat exchange.

[0015] As a further optimization of the present invention, the first connecting shaft is disposed at the eccentric position of the eccentric wheel and there is a distance between it and the center of the eccentric wheel.

[0016] The beneficial effects of this invention are as follows: The swing unit of this invention can drive the flexible storage bag to swing back and forth smoothly, dynamically updating the contact interface between the bag and the thawing medium to eliminate the low-temperature adhesion layer, ensuring that the entire bag is in full contact with the high-temperature medium, and can also drive the limiting rod to initially squeeze the bag to assist the flow of plasma, greatly improving the heat exchange efficiency and realizing the simultaneous thawing of multiple bags, effectively solving the problems of limited contact between plasma bags and the medium, the formation of a low-temperature adhesion layer on the surface hindering heat exchange, and uneven thawing of multiple bags stacked together; In addition, the kneading unit can periodically and uniformly knead the entire length, promoting bidirectional convection of plasma inside the bag to break the local low-temperature zone, and using the elastic buffer of the spring to gradually change the kneading force to protect the plasma bag and active ingredients. By capturing the motion of the swing unit and converting it into kneading power, the two are coordinated and linked, solving the problem of uneven thawing caused by the poor thermal conductivity of plasma leading to overheating of the outer layer and failure of the inner layer to thaw, and the inability to eliminate the local low-temperature zone inside the bag. Attached Figure Description

[0017] Figure 1 This is a three-dimensional structural schematic diagram of the present invention; Figure 2 This is an exploded three-dimensional structural diagram of the present invention; Figure 3 This is a three-dimensional structural diagram of the flexible storage bag, swing unit, and kneading unit of the present invention; Figure 4This is a partial three-dimensional structural diagram of the swing unit of the present invention; Figure 5 This is a partial three-dimensional structural diagram of the kneading unit of the present invention; Figure 6 This is the invention Figure 5 Enlarged view of the structure at point A in the middle; Figure 7 This is a three-dimensional structural diagram of the swing unit of the present invention; Figure 8 This is the invention Figure 7 Enlarged view of the structure at point B in the middle.

[0018] In the diagram: 100, main body of the device; 110, defrosting box; 120, box opening; 130, cover plate; 140, water tank; 150, partition plate; 160, flexible storage bag; 200, swing unit; 210, limiting frame; 220, limiting rod; 230, connecting block; 231, first guide sleeve; 232, first guide rod; 240, swing frame; 241, second guide sleeve; 242, second guide rod; 250, first slide groove; 260, motor; 270, eccentric wheel; 280, first connecting shaft; 300, kneading unit; 310, second connecting shaft; 320, cam column; 330, cam groove; 340, slide rod; 350, splined shaft; 360, second slide groove; 370, slider; 380, spring; 390, reciprocating rod; 391, bushing; 392, gear. Detailed Implementation

[0019] The subject matter described herein will now be discussed with reference to exemplary embodiments. It should be understood that these embodiments are discussed only to enable those skilled in the art to better understand and implement the subject matter described herein, and changes may be made to the function and arrangement of the elements discussed without departing from the scope of this specification. Various processes or components may be omitted, substituted, or added as needed in the examples. Furthermore, features described in some examples may be combined in other examples.

[0020] According to the appendix Figure 1 and attached Figure 2 As shown, a dry plasma thawing device includes a main body 100, which includes a thawing chamber 110. The thawing chamber 110 has an opening 120, and a cover plate 130 is rotatably connected to the opening 120. A water tank 140 for holding thawing medium to create a heat exchange environment is fixedly installed inside the thawing chamber 110. A partition 150 for separating thawing areas is provided inside the water tank 140. Multiple sets of through slots communicating with the inside of the water tank 140 are opened through the partition 150. Each through slot is equipped with a flexible storage bag 160 for holding plasma to be thawed and which can be deformed to conform to the thawing medium.

[0021] According to the appendix Figure 2 and attached Figure 3 As shown, the swing unit 200 includes limiting members symmetrically arranged on both sides inside the water tank 140. The limiting members are used to laterally limit the flexible storage bag 160 and drive it to swing back and forth. Each set of limiting members includes two sets of limiting frames 210. Between the two sets of limiting frames 210, there are multiple sets of limiting rods 220 for squeezing the flexible storage bag 160, and the limiting rods 220 are correspondingly arranged on both sides of the multiple sets of flexible storage bags 160. Through the coordinated kneading of the limiting rods 220 on both sides, the plasma in the flexible storage bag 160 is fully turned over, avoiding uneven thawing caused by local low temperature of the plasma. The flexible storage bag 160 moves back and forth with the swing unit 200, constantly updating the contact interface with the thawing medium, avoiding the formation of a low temperature adhesion layer on the surface of the bag, and ensuring that all areas of the bag can fully contact the high temperature medium to achieve full-area heat exchange.

[0022] According to the appendix Figure 3 and attached Figure 4 As shown, a connecting block 230 is installed between each pair of adjacent limit frames 210. One set of connecting blocks 230 is equipped with a swing frame 240 for driving the flexible storage bag 160 to swing back and forth. The swing frame 240 has a first sliding groove 250 inside. The defrosting box 110 is also equipped with a motor 260. The output shaft of the motor 260 passes through the water tank 140 and is equipped with an eccentric wheel 270. A first connecting shaft 280 is installed on the eccentric wheel 270. The first connecting shaft 280 is slidably connected to the first sliding groove 250. The motor 260 drives the eccentric wheel 270 to rotate, so that the first connecting shaft 280 slides along the first sliding groove 250 and drives the swing frame 240 to swing back and forth, thereby driving the flexible storage bag 160 to fully contact the defrosting medium and accelerate heat exchange.

[0023] Among them, a first guide sleeve 231 is installed on the side of the two sets of connecting blocks 230 that are far apart, and a first guide rod 232 is slidably connected inside the first guide sleeve 231. The two ends of the first guide rod 232 are fixedly connected to the inner wall of the water tank 140.

[0024] The swing frame 240 is equipped with a second guide sleeve 241 at the end away from the first guide sleeve 231, and a second guide rod 242 is slidably connected inside the second guide sleeve 241. The two ends of the second guide rod 242 are fixedly connected to the inner wall of the water tank 140.

[0025] It should be noted that the first connecting shaft 280 is located at the eccentric position of the eccentric wheel 270 and there is a gap between it and the center of the eccentric wheel 270. Through the eccentric setting, when the eccentric wheel 270 rotates, it drives the first connecting shaft 280 to generate eccentric circumferential motion, thereby converting the rotational power into the reciprocating swing power of the swing frame 240, ensuring the stability of the swing amplitude and realizing uniform thawing of the plasma.

[0026] It should be noted that the core working logic of the oscillating unit 200 of this device is to enhance heat exchange efficiency through dynamic motion and ensure thawing stability through structural constraints. The specific working principle is as follows: When the motor 260 is started, the output shaft of the motor 260 drives the eccentric wheel 270 to rotate at a constant speed around its own center. Since the first connecting shaft 280 is located at the eccentric position of the eccentric wheel 270, it forms an eccentric circumferential trajectory when it rotates with the eccentric wheel 270. The first connecting shaft 280 is embedded in the first sliding groove 250 of the swing frame 240. When the first connecting shaft 280 moves along the circumference, the sliding groove forms a radial constraint on it, forcing the swing frame 240 to swing back and forth in a direction parallel to the first guide rod 232 and the second guide rod 242.

[0027] The reciprocating swing of the swing frame 240 is transmitted to the two sets of limit frames 210 through the connecting block 230. When the limit frame 210 moves, the first guide sleeve 231 on both sides slides along the first guide rod 232, and the second guide sleeve 241 at the end of the swing frame 240 slides along the second guide rod 242. The two sets of guide structures together restrict the movement trajectory to ensure that the limit frame 210 only makes a smooth reciprocating linear motion.

[0028] The flexible storage bag 160 is indirectly constrained by the through groove of the partition 150 and the limiting frame 210. It swings back and forth synchronously with the limiting frame 210 to achieve dynamic contact with the thawing medium in the water tank 140. Compared with static immersion, dynamic swinging can continuously update the medium layer on the surface of the storage bag, eliminate the low temperature accumulation of the contact boundary layer, and improve the heat exchange efficiency.

[0029] While the limiting frame 210 drives the flexible storage bag 160 to swing, the limiting rods 220 between the two sets of limiting frames 210 move synchronously with the limiting frame 210. Due to the change in relative position during the swing, the storage bag is subjected to periodic lateral compression. The compression of the limiting rods 220 forces the storage bag to undergo local deformation, pushing the plasma inside the bag from the compression area to the non-compression area. During the reciprocating swing, the compression direction changes periodically with the swing direction, forming bidirectional convection of plasma, completely breaking the local low temperature zone inside the bag, and avoiding the phenomenon of outer layer thawing and inner layer freezing caused by the low thermal conductivity of plasma.

[0030] The partition 150 ensures that each storage bag is subjected to force independently, avoiding uneven kneading caused by stacking multiple bags, and further ensuring the uniformity of thawing of a single bag of plasma.

[0031] According to the appendix Figure 3 Appendix Figure 5 and attached Figure 6As shown, the kneading unit 300 includes a second connecting shaft 310 connected to the limiting frame 210 by a bearing, and multiple sets of cam columns 320 for driving the kneading action are installed on the second connecting shaft 310. Cam grooves 330 are provided on both sides of the outer side of the cam column 320. A slide rod 340 is slidably connected inside the cam groove 330, and the slide rod 340 is installed at both ends of the limiting rod 220.

[0032] The cam groove 330 is elliptical in shape. When the cam column 320 drives the cam groove 330 to rotate one revolution, the slide bar 340 moves back and forth along the elliptical trajectory inside the cam groove 330 to drive the limit rod 220 to periodically approach or move away from the flexible storage bag 160, thereby achieving uniform kneading of the plasma and preventing local thawing from being too fast.

[0033] According to the appendix Figure 6 As shown, a splined shaft 350 is provided inside the second connecting shaft 310. The two ends of the splined shaft 350 are connected to the bearings on the inner wall of the water tank 140. A keyway adapted to the splined shaft 350 is provided inside the second connecting shaft 310. The splined shaft 350 and the keyway are slidably connected.

[0034] According to the appendix Figure 7 and attached Figure 8 As shown, the limiting frame 210 has multiple sets of second slide grooves 360 inside, and each set of second slide grooves 360 has a slider 370 symmetrically slidably arranged inside. The slider 370 is installed at both ends of the limiting rod 220 so as to limit the movement trajectory of the slider 370 through the second slide grooves 360, so as to ensure that the kneading action of the limiting rod 220 on the flexible storage bag 160 is stable and controllable.

[0035] Furthermore, a spring 380 is installed between the two sets of sliders 370 inside the same second chute 360; the spring 380, through its elastic reset action, ensures that the two sliders 370 always maintain elastic support for the limiting rod 220, preventing the limiting rod 220 from detaching from the flexible storage bag 160 due to excessive movement, while also buffering the impact force on the blood plasma during the kneading process.

[0036] According to the appendix Figure 8 As shown, a reciprocating rod 390 is provided on the side of the limiting frame 210 that is far away from each other, and a bushing 391 is slidably connected to the outside of the reciprocating rod 390. The bushing 391 and the limiting frame 210 are rotatably connected by a bearing. A gear 392 is also installed on the outside of the second connecting shaft 310 and the bushing 391, and the gears 392 are meshed together. The reciprocating rod 390 is fixedly connected to the inner wall of the water tank 140.

[0037] Specifically, multiple sets of spiral grooves are formed in a ring on the outer surface of the rifling rod 390 and the inner wall of the bushing 391. The raised part of the groove on the rifling rod 390 matches the recessed part of the groove on the bushing 391. When the bushing 391 moves outside the rifling rod 390, the raised part and the recessed part of the groove squeeze each other, driving the bushing 391 to rotate, providing rotational driving force for the gear 392 to transmit power, and ensuring that the kneading action and the swinging action are synchronized and coordinated.

[0038] It should be noted that the working logic of the kneading unit 300 is triggered by the motion of the oscillating unit 200. Through multi-stage motion transformation, it ultimately forms a periodic kneading motion. The specific working principle is as follows: When the motor 260 of the swing unit 200 drives the limit frame 210 to reciprocate axially, the bushing 391 connected to the limit frame 210 moves axially along the reciprocating rod 390 synchronously with the limit frame 210; at the same time, the second connecting shaft 310 connected to the bearing of the limit frame 210 swings axially synchronously with the limit frame 210 and slides axially along the spline shaft 350 through spline engagement.

[0039] When the bushing 391 moves axially along the reciprocating rod 390, the outer surface of the reciprocating rod 390 and the inner wall of the bushing 391 are squeezed by the mutual cooperation of the protrusions and recesses, forcing the bushing 391 to rotate around the axis of the reciprocating rod 390; the rotation of the bushing 391 is transmitted to the second connecting shaft 310 through the meshing gear 392, driving the second connecting shaft 310 to rotate around its own axis; at this time, the spline shaft 350 ensures the stable transmission of the rotational power of the second connecting shaft 310 through the spline structure, while allowing its axial sliding.

[0040] The rotation of the second connecting shaft 310 drives the cam column 320 on it to rotate synchronously; the elliptical cam grooves 330 on both sides of the cam column 320 rotate with the cam column 320, and the slide rod 340 in the groove is constrained by the curve of the cam groove 330, and moves back and forth periodically along the elliptical trajectory. When the cam groove 330 rotates once, the slide rod 340 completes one reciprocation; the reciprocating movement of the slide rod 340 is directly transmitted to the limit rod 220 fixed to it, driving the limit rod 220 to make reciprocating linear motion in the direction perpendicular to the storage bag.

[0041] As the limiting rod 220 reciprocates with the sliding rod 340, it periodically compresses the flexible storage bags 160 on both sides. When the limiting rod 220 approaches the storage bag, it compresses the storage bag, causing local deformation and pushing the plasma inside the bag to flow to the uncompressed area, breaking the local low-temperature zone. When the limiting rod 220 moves away from the storage bag with the sliding rod 340, the elastic restoring force of the spring 380 pulls the slider 370 to return to its original position, ensuring that the limiting rod 220 maintains a reasonable distance from the storage bag and preventing it from detaching.

[0042] Throughout the kneading process, the buffering effect of the spring 380 causes the squeezing force of the limit rod 220 to change gradually with the rotation of the cam groove 330, without rigid impact, which ensures the blood plasma agitation effect and protects the blood plasma bag from damage.

[0043] The embodiments of this specific implementation have been described above. However, this embodiment is not limited to the specific implementation described above. The specific implementation described above is merely illustrative and not restrictive. Those skilled in the art can make many other forms based on the guidance of this embodiment, all of which are within the protection scope of this embodiment.

Claims

1. A dry plasma thawing device, characterized in that, include: The device body (100) includes a thawing box (110), a water tank (140) is installed inside the thawing box (110), a partition (150) is installed inside the water tank (140), and multiple sets of through slots communicating with the inside of the water tank (140) are opened on the partition (150), and flexible storage bags (160) are installed in the through slots. The swing unit (200) includes limiting members symmetrically arranged on both sides inside the water tank (140). The limiting members are used to laterally limit the flexible storage bag (160) and drive it to swing back and forth. Each set of limiting members includes two sets of limiting frames (210). Between the two sets of limiting frames (210), there are multiple sets of limiting rods (220) for squeezing the flexible storage bag (160), and the limiting rods (220) are correspondingly arranged on both sides of the multiple sets of flexible storage bags (160). The kneading unit (300) includes a second connecting shaft (310) connected to the limiting frame (210) by a bearing, and multiple sets of cam columns (320) for driving the kneading action are installed on the second connecting shaft (310). Cam grooves (330) are provided on both sides of the outer side of the cam column (320). A slide rod (340) is slidably connected inside the cam groove (330), and the slide rod (340) is installed at both ends of the limiting rod (220).

2. The dry plasma thawing device according to claim 1, characterized in that, The cam groove (330) is elliptical in shape; when the cam column (320) drives the cam groove (330) to rotate one revolution, the slide bar (340) moves back and forth along the elliptical trajectory inside the cam groove (330).

3. The dry plasma thawing device according to claim 1, characterized in that, The second connecting shaft (310) is provided with a spline shaft (350) inside. The two ends of the spline shaft (350) are connected to the inner wall bearing of the water tank (140). The second connecting shaft (310) is provided with a keyway that is compatible with the spline shaft (350) inside. The spline shaft (350) and the keyway are slidably connected.

4. The dry plasma thawing device according to claim 1, characterized in that, The limiting frame (210) has multiple sets of second slide grooves (360) inside, and each set of second slide grooves (360) has a slider (370) symmetrically slidably arranged inside. The slider (370) is installed at both ends of the limiting rod (220) to limit the movement trajectory of the slider (370) through the second slide grooves (360), so as to ensure that the kneading action of the limiting rod (220) on the flexible storage bag (160) is stable and controllable.

5. A dry plasma thawing device according to claim 4, characterized in that, A spring (380) is installed between the two sets of sliders (370) inside the same second groove (360); the spring (380) maintains elastic support for the two sliders (370) to the limiting rod (220) through elastic reset, so as to prevent the limiting rod (220) from detaching from the flexible storage bag (160) due to excessive movement, and at the same time buffer the impact force on the plasma during the kneading process.

6. The dry plasma thawing device according to claim 1, characterized in that, Each of the limiting frame (210) has a reciprocating rod (390) on the side away from each other, and a bushing (391) is slidably connected to the outside of the reciprocating rod (390). The bushing (391) and the limiting frame (210) are rotatably connected by a bearing. A gear (392) is also installed on the outside of the second connecting shaft (310) and the bushing (391), and the gears (392) are meshed together. The reciprocating rod (390) is fixedly connected to the inner wall of the water tank (140).

7. A dry plasma thawing device according to claim 6, characterized in that, The outer surface of the rifling rod (390) and the inner wall of the bushing (391) are both provided with multiple sets of spiral grooves in a ring shape. The protruding part of the groove on the rifling rod (390) is adapted to the recessed part of the groove on the bushing (391).

8. The dry plasma thawing device according to claim 1, characterized in that, A connecting block (230) is installed between each pair of adjacent limit frames (210). One of the connecting blocks (230) is equipped with a swing frame (240) for driving the flexible storage bag (160) to swing back and forth. A motor (260) is also installed inside the defrosting box (110). The output shaft of the motor (260) passes through the water tank (140) and is equipped with an eccentric wheel (270). A first connecting shaft (280) is installed on the eccentric wheel (270).

9. A dry plasma thawing device according to claim 8, characterized in that, The swing frame (240) has a first groove (250) inside, and the first connecting shaft (280) is slidably connected to the first groove (250). The motor (260) drives the eccentric wheel (270) to rotate, so that the first connecting shaft (280) slides along the first groove (250) and drives the swing frame (240) to swing back and forth, thereby driving the flexible storage bag (160) to fully contact the thawing medium and accelerate heat exchange.

10. A dry plasma thawing device according to claim 8, characterized in that, The first connecting shaft (280) is located at the eccentric position of the eccentric wheel (270) and there is a distance between it and the center of the eccentric wheel (270).

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