A cryogenic thermostat cooling liquid circulating device

Abstract

The application discloses a low-temperature constant-temperature cooling liquid circulating device and relates to the technical field of cooling equipment.The device comprises a bottom plate, a storage container, a cooler, a water pump, a cover plate, a compressed gas conveying pipe, a speed reducer, a rotating shaft and a stirring flow guide mechanism; and a water hammer buffering mechanism is arranged at the water outlet of the storage container.In the application, the heat insulation sleeve with a gap and the rotating plate are arranged in the storage container, so that the inner cavity of the container is divided into multiple independent fluid cavities.The cooling liquid after cooling is circulated in the fluid cavity corresponding to the gap, so that the "fluid short circuit" caused by the cooling liquid flowing to the water pumping port along the shortest path is avoided; meanwhile, the cooling liquid in the other fluid cavities not participating in the circulation is in a relatively static mixing state, so that heat conduction can be fully performed.The design breaks the traditional circulation blind area, makes the overall cooling liquid temperature tend to be consistent, reduces the temperature difference, improves the heat exchange efficiency, eliminates the circulation blind area and realizes constant-temperature balanced heat exchange.

Description

Technical Field

[0001] This invention relates to the field of cooling equipment technology, specifically to a low-temperature constant-temperature coolant circulation device. Background Technology

[0002] In industrial applications, after carbon dioxide capture, gaseous CO2 typically needs to be compressed and cooled multiple times to become a supercritical fluid or liquid. Because compression generates a large amount of heat, a coolant circulation system is required after each compression stage to prevent overheating and damage to equipment, and to improve compression efficiency.

[0003] Existing coolant circulation equipment primarily uses a cooler to cool the coolant in a container. Specifically, a water pump draws coolant from the container and delivers it to the cooler for heat exchange. The cooled coolant then flows back into the container via the cooler, thus achieving coolant circulation. However, existing equipment has the following drawback: due to the container's volume, when the cooled coolant flows back into the container, it often flows directly to the water pump's inlet along the path of least resistance (i.e., the shortest path), creating a "fluid short circuit."

[0004] Meanwhile, the coolant in the edges or corners of the container forms a "circulation dead zone" because it is difficult for it to participate in the aforementioned short-circuit circulation. The existence of this short circuit and dead zone leads to insufficient heat exchange of the coolant in the container, resulting in a significant temperature difference. Not only can the heat of the high-temperature coolant trapped in the dead zone not be effectively carried away, but the overall cooling capacity of the coolant pumped out by the water pump is also insufficient, ultimately resulting in poor cooling effect on the compressed gas. Summary of the Invention

[0005] The purpose of this invention is to provide a low-temperature constant-temperature coolant circulation device to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a low-temperature constant-temperature coolant circulation device, comprising a base plate, on which a storage container for storing coolant and a cooler are installed. The side wall of the storage container is provided with an outlet and an inlet. The outlet of the cooler is connected to the inlet through an outlet pipe. The inlet of the cooler is connected to a water pump through a first inlet pipe. The inlet side of the water pump is connected to the outlet through a second inlet pipe.

[0007] The storage container is equipped with a cover plate on top, and a compressed gas delivery pipe extending into the inner cavity of the storage container is installed through the cover plate.

[0008] A geared motor is installed on the cover plate. The output shaft of the geared motor drives a rotating shaft, which extends into the storage container and is connected to a stirring and guiding mechanism that rotates with it. A water hammer buffer mechanism for absorbing water pressure fluctuations is provided at the outlet of the storage container.

[0009] Furthermore, the stirring and guiding mechanism includes a rotating plate and a heat insulation sleeve; the heat insulation sleeve is coaxially installed in the inner cavity of the storage container, the heat insulation sleeve is hollow inside and has a notch, the compressed gas conveying pipe is located in the notch, and the notch corresponds to the water outlet and the water inlet;

[0010] Multiple rotating plates are mounted on the rotating shaft. The rotating plates are located in the inner cavity of the heat insulation sleeve, and a fluid cavity is formed between two adjacent rotating plates and the inner cavity wall of the heat insulation sleeve.

[0011] The rotating plate slides in contact with the inner wall of the heat insulation sleeve, and the multiple fluid cavities alternately communicate with the notch as the rotating shaft rotates; each fluid cavity is provided with a floating extrusion assembly.

[0012] Furthermore, the floating extrusion assembly includes a floating plate, a fixed plate, a sliding rod, a first magnet, and a first spring;

[0013] The fixed plate is fixed between two adjacent rotating plates, the sliding rod is vertically inserted through the fixed plate and can slide freely, the upper end of the sliding rod is fixed to the floating plate, and the floating plate slides in cooperation with the inner wall of the fluid cavity;

[0014] The bottom of the floating plate is fixedly connected to the first magnet, the first spring is wrapped around the periphery of the sliding rod, and the two ends of the first spring elastically abut against the first magnet and the fixed plate respectively;

[0015] A second magnet is installed on the cover plate at the position corresponding to the notch. The upward-facing side of the first magnet and the downward-facing side of the second magnet have the same magnetic poles to generate a repulsive force.

[0016] Furthermore, a first nut is threaded onto the lower end of the sliding rod, and the upper surface of the first nut abuts against the bottom surface of the fixed plate to limit the upward movement of the sliding rod; under the elastic support of the first spring, the floating plate tends to move upward to abut against the bottom surface of the cover plate.

[0017] Furthermore, the water hammer buffer mechanism includes a transition pipe, a connecting pipe, and a buffer chamber;

[0018] The transition pipe is connected to the outlet, and the second inlet pipe is connected to the transition pipe; one end of the connecting pipe is fixed to and connected to the periphery of the transition pipe, and the other end is connected to the buffer chamber; the buffer chamber is equipped with an elastic pressure storage component.

[0019] Furthermore, the elastic accumulator assembly includes a sliding plug, a floating rod, a second spring, and a hollow frame;

[0020] The buffer chamber is open at the end away from the transition tube and is fixedly installed with the hollow frame. The floating rod passes through the hollow frame and can slide freely.

[0021] The floating rod is fixed to the sliding plug at one end that passes through the buffer chamber. The sliding plug engages with the buffer chamber and slides in a sealing contact with the inner wall of the cavity.

[0022] The second spring is wrapped around the periphery of the floating rod, and the two ends of the second spring elastically abut against the sliding plug and the hollow frame, respectively.

[0023] Furthermore, a second nut is threaded onto the lower end of the floating rod, and the second nut is used to limit the movement of the floating rod toward the transition tube.

[0024] Furthermore, the outlet and inlet are located on the same side of the storage container and are arranged sequentially from top to bottom, and the notch is correspondingly located in the side area where the outlet and inlet are located.

[0025] Furthermore, when the fluid cavity rotates with the rotating plate to correspond to the notch, the first magnet and the second magnet generate a repulsive force corresponding to each other, driving the floating plate to overcome the elastic force of the first spring and move downward to squeeze the coolant in the fluid cavity;

[0026] When the first magnet moves away from the second magnet along with the rotating plate, the first spring releases its elastic potential energy to drive the floating plate to return to its original upward position.

[0027] Furthermore, when the water pressure at the outlet increases, the coolant enters the transition pipe and pushes the sliding plug to overcome the elastic force of the second spring and slide away from the transition pipe, so that some coolant is stored in the buffer chamber.

[0028] When the water pressure at the outlet decreases instantaneously, the second spring releases its elastic potential energy to drive the sliding plug to slide towards the transition pipe, thereby quickly pushing the coolant in the buffer chamber into the transition pipe to compensate for the water pressure in the water pump.

[0029] Compared with the prior art, the beneficial effects of the present invention are:

[0030] 1. In this invention, by setting a heat-insulating sleeve with notches and a rotating plate inside the storage container, the container cavity is divided into multiple independent "fluid chambers." The cooled coolant flows back to the fluid chamber corresponding to the notch for individual circulation, avoiding the "fluid short circuit" caused by the coolant flowing directly to the intake port along the shortest path. Simultaneously, the coolant in other fluid chambers not participating in the circulation is in a relatively static mixed state, allowing for sufficient heat conduction. This design breaks through the traditional circulation blind zone, making the overall coolant temperature more uniform, reducing temperature differences, improving heat exchange efficiency, eliminating circulation blind zones, and achieving constant-temperature balanced heat exchange.

[0031] 2. In this invention, when the fluid cavity rotates to the notch position, the floating plate moves downward under the repulsive force of the like poles of the first and second magnets, physically squeezing the coolant in the fluid cavity. This effect forces the coolant, which might otherwise stagnate, to quickly participate in the circulation flow, stabilizing it rapidly. This not only improves the output efficiency of cooling capacity but also effectively prevents cavitation or pump damage caused by air being drawn into the water pump due to coolant surface fluctuations. It forces the coolant to participate in circulation, improves the cooling response speed, and prevents cavitation.

[0032] 3. In this invention, when the rotating plate rotates to the notch, causing two adjacent fluid chambers to suddenly connect, the water pressure in the system will decrease instantaneously, which can easily trigger water hammer and impact the water pump. The solution includes a buffer chamber with an elastic pressure accumulator at the outlet: when the water pressure is normal or high, the sliding plug compresses the spring to store some coolant in the buffer chamber; when the water pressure decreases instantaneously, the spring releases its potential energy to push the sliding plug quickly back into the transition pipe, compensating for the system water pressure, thereby significantly reducing or even eliminating water hammer impact in the water pump and pipelines, ensuring safe equipment operation, absorbing water pressure fluctuations, and effectively suppressing the water hammer effect.

[0033] 4. In this invention, due to the reduction in overall coolant temperature difference, uniform distribution of cooling capacity, and improved circulation efficiency, the coolant can cool the carbon dioxide gas in the compressed gas delivery pipe more efficiently and continuously, preventing the gas from overheating and damaging the compression equipment. This ensures the compression cooling efficiency of carbon dioxide as it transforms from a gaseous state to a supercritical fluid or liquid state, enhances the cooling effect on the compressed gas, and protects downstream equipment. Attached Figure Description

[0034] Figure 1 This is a schematic diagram of the overall structure of a low-temperature constant-temperature coolant circulation device according to the present invention;

[0035] Figure 2 for Figure 1 A schematic diagram showing the positional relationship of the structure from another perspective;

[0036] Figure 3This is a schematic diagram showing the positional relationship of the storage container, cover plate, and geared motor after assembly in this invention.

[0037] Figure 4 for Figure 3 A schematic diagram showing the positional relationship of the middle section after it has been cut open;

[0038] Figure 5 This is a schematic diagram showing the positional relationship of the heat insulation sleeve, rotating plate, and compressed gas delivery pipe after assembly in this invention;

[0039] Figure 6 for Figure 5 A schematic diagram showing the positional relationship after omitting the heat insulation sleeve;

[0040] Figure 7 for Figure 6 A schematic diagram showing the positional relationship of the structure from another perspective;

[0041] Figure 8 for Figure 7 A magnified schematic diagram of the positional relationship of a local structure at point A in the middle;

[0042] Figure 9 This is a schematic diagram showing the positional relationship of the transition pipe, connecting pipe, and buffer chamber after assembly in this invention;

[0043] Figure 10 for Figure 9 A schematic diagram of the positional relationships after the explosive decomposition of the medium structure.

[0044] The following are the annotations for each item in the figure: 1. Base plate; 2. Storage container; 3. Gear motor; 4. Cover plate; 5. Second magnet; 6. Compressed gas delivery pipe; 7. Transition pipe; 8. Buffer chamber; 9. Second water inlet pipe; 10. Water outlet pipe; 11. Cooler; 12. Water pump; 13. First water inlet pipe; 14. Heat insulation sleeve; 15. Rotating plate; 16. Rotating shaft; 17. Floating plate; 18. Fixed plate; 19. First magnet; 20. First spring; 21. Sliding rod; 22. First nut; 23. Sliding plug; 24. Floating rod; 25. Second spring; 26. Hollow frame; 27. Second nut. Detailed Implementation

[0045] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0046] Please see Figures 1-10This invention provides a technical solution: a low-temperature constant-temperature coolant circulation device, comprising a base plate 1, a storage container 2 for storing coolant installed on the base plate 1, the top of the storage container 2 being open and fitted with a cover plate 4 by screws, an outlet on the upper side wall of the storage container 2, and an inlet on the lower side wall, a cooler 11 (which can be configured as a condenser) also being installed on the base plate 1, an outlet pipe 10 being installed at the outlet end of the cooler 11, the end of the outlet pipe 10 away from the cooler 11 being installed at the inlet of the storage container 2, a first inlet pipe 13 being installed at the inlet end of the cooler 11, a water pump 12 being installed on the base plate 1, the outlet side of the water pump 12 being connected to the end of the first inlet pipe 13 away from the cooler 11, and a second inlet pipe being installed at the inlet side of the water pump 12. Water pipe 9 and second inlet pipe 9 are connected to the outlet of storage container 2. When water pump 12 is started, the coolant in storage container 2 can enter the second inlet pipe 9 from the outlet of storage container 2, and then enter the first inlet pipe 13 from the outlet side of water pump 12 and enter the cooler 11. The coolant is cooled by the cooler 11, and then enters the outlet pipe 10 from the outlet end of the cooler 11. After entering the outlet pipe 10, the coolant flows back to storage container 2 from the inlet of storage container 2, so that the coolant can circulate between storage container 2 and cooler 11. A compressed gas delivery pipe 6 is installed on the cover plate 4 and extends into the inner cavity of storage container 2. During the circulation process, the coolant can cool the carbon dioxide gas in the compressed gas delivery pipe 6.

[0047] Combination Figures 1 to 10 As shown, and please refer to the following: Figures 1 to 3A geared motor 3 is installed on the cover plate 4. The output shaft of the geared motor 3 drives a rotating shaft 16. The upper end of the rotating shaft 16 is rotatably connected to the cover plate 4. Multiple rotating plates 15 are installed on the part of the rotating shaft 16 extending into the storage container 2. The water inlet and outlet of the storage container 2 are located on the same side of the storage container 2 and are arranged sequentially from top to bottom. A heat insulation sleeve 14 is coaxially installed in the inner cavity of the storage container 2. The heat insulation sleeve 14 is hollow inside and has a notch. The part of the compressed gas delivery pipe 6 extending into the storage container 2 is located in the notch. In addition, the notch corresponds exactly to the water inlet and outlet of the storage container 2. The rotating plates 15 are located at... In the inner cavity of the heat insulation sleeve 14, a fluid cavity is formed between two adjacent rotating plates 15 and the inner cavity wall of the heat insulation sleeve 14. The rotating plates 15 slide in contact with the inner cavity wall of the heat insulation sleeve 14. The contact surface between the rotating plates 15 and the inner cavity wall of the heat insulation sleeve 14 allows liquid to pass through. The output shaft of the reduction motor 3 rotates, which in turn drives the rotating shaft 16 to rotate, so that the rotating plates 15 can rotate in the inner cavity of the heat insulation sleeve 14. This allows multiple fluid cavities to alternately connect with the notch. Each fluid cavity is fitted with a floating plate 17. The outline of the floating plate 17 is in a matching state with the inner cavity wall of the fluid cavity. The floating plate 17 can slide freely up and down in the inner cavity of the fluid cavity.

[0048] Combination Figures 1 to 10 As shown, and please refer to the following: Figures 6 to 10Two adjacent rotating plates 15 are fixedly connected to a fixed plate 18. A sliding rod 21 is vertically inserted through the fixed plate 18, allowing the sliding rod 21 to slide freely on the fixed plate 18. The upper end of the sliding rod 21 is fixedly connected to a floating plate 17. Thus, when the sliding rod 21 slides vertically on the fixed plate 18, it synchronously drives the floating plate 17 to slide up and down. A first magnet 19 is fixedly connected to the bottom of the floating plate 17. A first spring 20 is wound around the periphery of the sliding rod 21. The two ends of the first spring 20 elastically abut against the first magnet 19 and the fixed plate 18, respectively. Under normal conditions, the first spring 20 has an upward elastic abutting force against the first magnet 19 and the fixed plate 18, thereby driving the sliding rod 21 to move upward. When the sliding rod 21 moves upward, it synchronously drives the floating plate 17 to move upward, causing the upper surface of the floating plate 17 to abut against the bottom surface of the cover plate 4. Furthermore, the sliding rod 21... The lower end of the slide is threaded with a first nut 22. The upper end of the first nut 22 abuts against the bottom surface of the fixed plate 18 and is used to limit the upward movement of the sliding rod 21. A second magnet 5 is installed on the cover plate 4. The second magnet 5 corresponds to the position of the notch. The magnetic poles of the first magnet 19 facing upward and the magnetic poles of the second magnet 5 facing downward are in the same state. That is, the magnetic poles of the opposite ends of the first magnet 19 and the second magnet 5 are the same. When the first magnet 19 is rotated to the position corresponding to the notch, the second magnet 5 will generate a repulsive force with the first magnet 19 corresponding to the rotating plate 15. This causes the first magnet 19 to drive the floating plate 17 to move downward and compress the first spring 20. When the first magnet 19 moves away from the second magnet 5, the elastic potential energy stored in the first spring 20 will be released and drive the floating plate 17 to move upward and reset.

[0049] Combination Figures 1 to 10 As shown, and please refer to the following: Figures 6 to 10The outlet of storage container 2 is equipped with a transition pipe 7, which is connected to the outlet. The second inlet pipe 9 is also connected to the transition pipe 7. A connecting pipe is fixed to the periphery of the transition pipe 7. A buffer chamber 8 is connected to the end of the connecting pipe away from the transition pipe 7. The inner cavity of the buffer chamber 8 is connected to the connecting pipe, and the connecting pipe is also connected to the transition pipe 7. This makes the buffer chamber 8 and the transition pipe 7 connected. The end of the buffer chamber 8 away from the transition pipe 7 is open and is fixedly equipped with a perforated frame 26. A floating rod 24 is inserted through the perforated frame 26 and slides freely on the perforated frame 26. The floating rod 24 also passes through the inner cavity of the buffer chamber 8. A sliding plug 23 is fixedly installed at one end of the buffer chamber 8. The sliding plug 23 is engaged in the inner cavity of the buffer chamber 8 and can slide freely. The contact surface between the sliding plug 23 and the inner wall of the buffer chamber 8 is sealed. A second spring 25 is wrapped around the periphery of the floating rod 24. The two ends of the second spring 25 elastically abut against the sliding plug 23 and the hollow frame 26 respectively in the direction of the elastic force. A second nut 27 is threadedly connected to the lower end of the floating rod 24. The second nut 27 is used to limit the movement of the floating rod 24 towards the transition tube 7. When the sliding plug 23 moves away from the transition tube 7, it will compress the second spring 25, causing the second spring 25 to be in a compressed state and accumulate elastic potential energy.

[0050] Working principle of the invention:

[0051] The coolant in the fluid chamber corresponding to the notch in the storage container 2 is transported to the first inlet pipe 13 via the second inlet pipe 9 and then enters the cooler 11 through the first inlet pipe 13 for cooling. The cooled coolant is then transported to the storage container 2 and flows back to the fluid chamber. Since the cooled coolant circulates in a separate fluid chamber, the blind zone of the circulation flow is reduced, and the cooling effect on the carbon dioxide gas in the compressed gas delivery pipe 6 is better. In addition, the coolant in the other fluid chambers is in a mixed state at this time, so that the coolant in these fluid chambers can fully conduct heat, thereby reducing the temperature difference.

[0052] During the circulating cooling process, the geared motor 3 starts, which causes the output shaft of the geared motor 3 to drive the rotating shaft 16 to rotate at a low speed. When the rotating shaft 16 rotates, it synchronously drives the rotating plate 15 to rotate in the inner cavity of the heat insulation sleeve 14, so that multiple fluid chambers alternately correspond to the notch. When the rotating plate 15 rotates into the notch, the two adjacent fluid chambers will be connected. At this time, the coolant in the two fluid chambers will flow, causing water pressure changes in the water pump 12, which may lead to water hammer. Therefore, when the rotating plate 15 has not rotated to the notch, the two adjacent fluid chambers are not in a state of flow. After the coolant enters the transition pipe 7, it will be pushed by the water pressure to slide. The sliding plug 23 slides into the inner cavity of the buffer chamber 8, causing it to overcome the squeezing force of the second spring 25 and slide away from the transition pipe 7. This allows some coolant to enter the inner cavity of the buffer chamber 8 for storage. When the rotating plate 15 rotates to the notch, the two adjacent fluid chambers become connected, causing the water pressure in the fluid chamber to decrease. At this time, the water pressure in the water pump 12 will decrease instantly. Under the action of the release of the elastic potential energy of the second spring 25, the sliding plug 23 is driven to slide quickly towards the transition pipe 7, thereby quickly pushing the coolant stored in the buffer chamber 8 to the transition pipe 7 to increase the water pressure in the transition pipe 7. This can reduce the water hammer phenomenon in the water pump 12. Subsequently, the coolant pressure in the fluid chamber will recover.

[0053] Furthermore, when the fluid cavity rotates to align with the notch, the first magnet 19 also rotates to align with the second magnet 5. Since their opposite ends have the same magnetic poles, they generate a repulsive force, which drives the floating plate 17 to move downwards. This causes the floating plate 17 to overcome the elastic resistance of the first spring 20 and move downwards, squeezing the coolant in the fluid cavity. The squeezing force of the floating plate 17 allows the coolant to quickly stabilize within the fluid cavity, enabling it to rapidly participate in the circulation flow. Simultaneously, it prevents air from entering due to fluctuations in the coolant surface. When the first magnet 19 moves away from the second magnet 5, the elastic potential energy stored in the first spring 20 due to previous compression will be released, driving the floating plate 17 to move upward and reset. In addition, when the floating plate 17 exerts pressure on the coolant, the water pressure in the fluid cavity increases relatively. When the rotating plate 15 rotates to the notch, the two adjacent fluid cavities become connected, causing the water pressure in the fluid cavity to decrease rapidly. During the above process, the sliding plug 23 will move upward and squeeze the coolant in the buffer chamber 8 into the transition pipe 7, thereby reducing the water hammer phenomenon in the water pump 12 to a certain extent.

[0054] It should be noted that, in this document, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A low-temperature constant-temperature coolant circulation device, characterized in that, Includes a base plate (1), on which a storage container (2) for storing coolant and a cooler (11) are installed. The side wall of the storage container (2) is provided with an outlet and an inlet. The outlet of the cooler (11) is connected to the inlet through an outlet pipe (10). The inlet of the cooler (11) is connected to a water pump (12) through a first inlet pipe (13). The inlet side of the water pump (12) is connected to the outlet through a second inlet pipe (9). The storage container (2) is equipped with a cover plate (4) on top, and a compressed gas delivery pipe (6) extending into the inner cavity of the storage container (2) is installed on the cover plate (4). A geared motor (3) is installed on the cover plate (4). The output shaft of the geared motor (3) is connected to a rotating shaft (16). The rotating shaft (16) extends into the storage container (2) and is connected to a stirring and guiding mechanism that rotates with it. A water hammer buffer mechanism for absorbing water pressure fluctuations is provided at the outlet of the storage container (2).

2. The low-temperature constant-temperature coolant circulation device according to claim 1, characterized in that, The stirring and guiding mechanism includes a rotating plate (15) and a heat insulation sleeve (14). The heat insulation sleeve (14) is coaxially installed in the inner cavity of the storage container (2). The heat insulation sleeve (14) is hollow inside and has a notch. The compressed gas delivery pipe (6) is located in the notch, and the notch corresponds to the water outlet and the water inlet. Multiple rotating plates (15) are installed on the rotating shaft (16). The rotating plates (15) are located in the inner cavity of the heat insulation sleeve (14). A fluid cavity is formed between two adjacent rotating plates (15) and the inner cavity wall of the heat insulation sleeve (14). The rotating plate (15) slides in contact with the inner wall of the heat insulation sleeve (14), and the multiple fluid cavities alternately communicate with the notch as the rotating shaft (16) rotates; each fluid cavity is provided with a floating extrusion assembly.

3. The low-temperature constant-temperature coolant circulation device according to claim 2, characterized in that, The floating extrusion assembly includes a floating plate (17), a fixed plate (18), a sliding rod (21), a first magnet (19), and a first spring (20). The fixed plate (18) is fixed between two adjacent rotating plates (15), the sliding rod (21) is vertically inserted through the fixed plate (18) and can slide freely, the upper end of the sliding rod (21) is fixed to the floating plate (17), and the floating plate (17) slides in cooperation with the inner wall of the fluid cavity; The bottom of the floating plate (17) is fixedly connected to the first magnet (19), the first spring (20) is wrapped around the periphery of the sliding rod (21), and the two ends of the first spring (20) elastically abut against the first magnet (19) and the fixed plate (18) respectively. A second magnet (5) is installed on the cover plate (4) at the position corresponding to the notch. The upward side of the first magnet (19) and the downward side of the second magnet (5) have the same magnetic poles to generate a repulsive force.

4. The low-temperature constant-temperature coolant circulation device according to claim 3, characterized in that, The lower end of the sliding rod (21) is threaded with a first nut (22), the upper end face of the first nut (22) abuts against the bottom surface of the fixed plate (18), which is used to limit the upward movement of the sliding rod (21); under the elastic support of the first spring (20), the floating plate (17) has a tendency to move upward to abut against the bottom surface of the cover plate (4).

5. A low-temperature constant-temperature coolant circulation device according to claim 1, characterized in that, The water hammer buffer mechanism includes a transition pipe (7), a connecting pipe, and a buffer chamber (8). The transition pipe (7) is connected to the outlet, and the second inlet pipe (9) is connected to the transition pipe (7). One end of the connecting pipe is fixed to and connected to the periphery of the transition pipe (7), and the other end is connected to the buffer chamber (8). The buffer chamber (8) is equipped with an elastic pressure storage component.

6. A low-temperature constant-temperature coolant circulation device according to claim 5, characterized in that, The elastic accumulator assembly includes a sliding plug (23), a floating rod (24), a second spring (25), and a hollow frame (26). The buffer chamber (8) is open at one end away from the transition tube (7) and the hollow frame (26) is fixedly installed thereon. The floating rod (24) passes through the hollow frame (26) and can slide freely. The floating rod (24) is fixed to the sliding plug (23) at one end that enters the buffer chamber (8). The sliding plug (23) is engaged in the buffer chamber (8) and makes a sealing sliding contact with the inner cavity wall. The second spring (25) is wrapped around the periphery of the floating rod (24), and the two ends of the second spring (25) elastically abut against the sliding plug (23) and the hollow frame (26) respectively.

7. A low-temperature constant-temperature coolant circulation device according to claim 6, characterized in that, The lower end of the floating rod (24) is threaded with a second nut (27), which is used to limit the movement of the floating rod (24) toward the transition tube (7).

8. A low-temperature constant-temperature coolant circulation device according to claim 2, characterized in that, The outlet and inlet are located on the same side of the storage container (2) and are arranged sequentially from top to bottom. The notch is located on the side area where the outlet and inlet are located.

9. A low-temperature constant-temperature coolant circulation device according to claim 3, characterized in that, When the fluid cavity rotates with the rotating plate (15) to correspond to the notch, the first magnet (19) and the second magnet (5) are in corresponding positions and generate a repulsive force, driving the floating plate (17) to overcome the elastic force of the first spring (20) and move downward to squeeze the coolant in the fluid cavity; When the first magnet (19) moves away from the second magnet (5) along with the rotating plate (15), the first spring (20) releases its elastic potential energy to drive the floating plate (17) to return to its original upward position.

10. A low-temperature constant-temperature coolant circulation device according to claim 6, characterized in that, When the water pressure at the outlet increases, the coolant enters the transition pipe (7) and pushes the sliding plug (23) to overcome the elastic force of the second spring (25) and slide away from the transition pipe (7), so that part of the coolant is stored in the buffer chamber (8); When the water pressure at the outlet decreases instantaneously, the second spring (25) releases elastic potential energy to drive the sliding plug (23) to slide towards the transition pipe (7), quickly pushing the coolant in the buffer chamber (8) into the transition pipe (7) to compensate for the water pressure in the water pump (12).

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