Medical barrel-shaped phase change energy storage device

Abstract

A medical barrel-shaped phase change energy storage device comprises a barrel body, a support structure, a PE horizontal pipe, a PE vertical pipe, a water segregator, a water collector and a phase change material, and the barrel body is closed and comprises a barrel wall, a barrel bottom and a barrel cover; a shell is arranged outside the barrel body, and a thermal insulation material is arranged between the barrel body and the shell; the PE horizontal pipes are arranged in the barrel body in multiple layers through a support structure, each layer of PE horizontal pipe is in an annular coiling shape and is provided with an inlet and an outlet, the inlets are connected with the water segregator through the PE vertical pipes, and the outlets are connected with the water collector through the PE vertical pipes; the water distributor is connected with a cooling water inlet pipe; the water collector is connected with a cooling water outlet pipe; and the phase change material is filled in the barrel body. The device has the advantages of being high in cold storage density, stable in cold storage / release temperature, easy to control and the like, is applied to a process cooling water system matched with medical nuclear magnetic resonance equipment, and can effectively solve the problem of magnet quenching when a water chilling unit for providing cooling water for a helium compressor breaks down.

Description

Technical Field

[0001] This application belongs to the field of process cooling water systems for medical magnetic resonance imaging equipment, and specifically relates to a barrel-shaped phase change energy storage device. Background Technology

[0002] The magnets inside an MRI machine are superconducting magnets, requiring liquid helium to maintain their cryogenic temperature. When some of the liquid helium inside the magnet heats up and turns into a gaseous state, a section or part of the magnet loses its superconductivity and generates resistance. The large current flowing through the coils passes through this resistance, generating significant heat that heats nearby coils, triggering a chain reaction that ultimately causes all the main coils to lose their superconductivity. The helium then converts the current into heat, further heating the liquid helium, causing it to evaporate in large quantities. The resulting helium gas is then released outdoors through a quench pipe. Liquid helium expands approximately 700 times in volume upon evaporation, so the helium gas must be immediately released outdoors through the quench pipe to prevent serious incidents such as personal injury. The helium compressor is a crucial component for maintaining the cryogenic temperature of liquid helium. It requires continuous operation 24 / 7, 365 days a year, and a constant supply of cooling water at a specific temperature. A magnet quenching accident occurs when the chiller supplying the cooling water to the helium compressor malfunctions. Therefore, ensuring a continuous and uninterrupted supply of cooling water is crucial for the safe operation of medical MRI equipment. Summary of the Invention

[0003] The purpose of this application is to provide a medical barrel-shaped phase change energy storage device to solve the problem of magnet quenching when the chiller unit that provides cooling water to the helium compressor malfunctions.

[0004] To achieve the above objectives, the technical solution proposed in this application is as follows:

[0005] A medical barrel-shaped phase change energy storage device includes: a barrel body, a support structure, several PE horizontal pipes 8, several PE vertical pipes 9, a water distributor 10, a water collector 11, and a phase change material 15, wherein:

[0006] The barrel is enclosed and includes a barrel wall 1, a barrel bottom 5, and a barrel lid 6; the barrel is covered with an outer shell 3, and insulation material 2 is provided between the barrel and the outer shell; the barrel is equipped with a cooling water inlet pipe and a cooling water outlet pipe.

[0007] The water distributor 10 and the water collector 11 are fixed at the top of the tank. The water distributor 10 is connected to the cooling water inlet pipe, and the water collector 11 is connected to the cooling water outlet pipe.

[0008] The PE horizontal pipes 8 are installed in multiple layers inside the tank through a support structure. Each layer of PE horizontal pipes 8 is in a ring-shaped coil. Each layer of PE horizontal pipes 8 has an inlet and an outlet. The inlet is connected to the water distributor 10 through the PE riser 9, and the outlet is connected to the water collector 11 through the PE riser 9. The inlet and outlet positions of the PE horizontal pipes in adjacent layers are different.

[0009] The cooling water in the cooling water inlet pipe is fed into the PE horizontal pipe 8 of each layer by the water distributor 10; the cooling water in the PE horizontal pipe 8 of each layer is collected by the water collector 11 and then discharged to the cooling water outlet pipe; the multi-layer PE horizontal pipe 8 and PE vertical pipe 9 form multiple cooling water flow branches under the action of the water distributor 10 and the water collector 11.

[0010] The phase change material 15 is filled in the barrel, covering the PE horizontal pipe 8, and is used to store and release cold energy, thereby regulating the temperature.

[0011] Furthermore, a drain outlet 4 is provided on the lower side of the barrel.

[0012] Furthermore, the support structure includes steel pipes 14, several angle steels 13, and several pipe supports 12, wherein:

[0013] The steel pipe 14 is fixed to the center of the bottom of the bucket 5. The angle steel 13 includes an inner angle steel and an outer angle steel. The inner angle steel is fixed to the outer wall of the steel pipe 14, and the outer angle steel is fixed to the bottom of the bucket 5 and adjacent to the bucket wall 1.

[0014] The plurality of pipe supports 12 are arranged in multiple layers, each layer containing multiple pipe supports 12, and the two ends of each pipe support 12 are fixed to the inner angle steel and the outer angle steel respectively.

[0015] The pipe rack 12 has multiple circular holes along its length, the size of which is slightly larger than the outer diameter of the PE horizontal pipe 8, for supporting and positioning the PE horizontal pipe 8.

[0016] The PE horizontal pipe 8 is installed in multiple layers inside the barrel through the pipe rack 12. Each layer of PE horizontal pipe 8 is coiled in a ring around the steel pipe 14 and passes through the round holes on the pipe rack 12 of that layer in sequence.

[0017] Furthermore, multiple pipe racks 12 on each layer are evenly distributed on the same horizontal plane, with each pipe rack 12 arranged radially along the barrel body.

[0018] Furthermore, the PE horizontal pipe 8 has n layers, which are the first layer, the second layer, ..., the nth layer from bottom to top; correspondingly, the water distributor 10 and the water collector 11 are also divided into n branches. One branch of the water distributor 10 is connected to the inlet of the first layer of PE horizontal pipe through the PE riser 9, and the outlet of the first layer of PE horizontal pipe is connected to a branch of the water collector 11 through the PE riser 9, thus forming a cooling water flow branch.

[0019] By setting different inlet and outlet positions of adjacent PE horizontal pipes and the connection positions of water distributor 10 and water collector 11, the cooling water flow direction in adjacent PE horizontal pipes is different. One layer flows in a ring from the center to the periphery, and the other layer flows in a ring from the periphery to the center, thereby making the heat exchange between the cooling water in the PE horizontal pipe and the phase change material 15 outside the PE horizontal pipe more uniform.

[0020] Furthermore, the first-layer PE horizontal pipe 8 is positioned and supported by the round holes on the first-layer pipe rack 12; the end of the first-layer PE horizontal pipe 8 near the steel pipe 14 is the inlet, and the end near the barrel wall 1 is the outlet. The inlet 8-1 of the first-layer PE horizontal pipe is connected to the water distributor 10 through the PE riser, and the outlet 8-2 of the first-layer PE horizontal pipe is connected to the water collector 11 through the PE riser; the cooling water in the first-layer PE horizontal pipe 8 flows in a ring from the center to the periphery.

[0021] The second-layer PE horizontal pipe 8 is positioned and supported by the round holes on the second-layer pipe rack 12; the end of the second-layer PE horizontal pipe 8 near the barrel wall 1 is the inlet, and the end near the steel pipe 14 is the outlet. The inlet 8-3 of the second-layer PE horizontal pipe is connected to the water distributor 10 through the PE riser, and the outlet 8-4 of the second-layer PE horizontal pipe is connected to the water collector 11 through the PE riser; the cooling water in the second-layer PE horizontal pipe flows in a ring from the periphery to the center.

[0022] Furthermore, the barrel wall 1, barrel bottom 5, and barrel cover 6 of the barrel-shaped phase change energy storage device are made of stainless steel plate; the outer shell 3 is made of color steel plate; and the drain outlet 4 is made of DN25 stainless steel pipe with external thread.

[0023] Furthermore, the insulation material 2 of the barrel-shaped phase change energy storage device is a 50mm thick rubber and plastic insulation material.

[0024] Furthermore, the pipe rack 12 is made of PP board.

[0025] Furthermore, the phase change material 15 is a solid-liquid phase change material.

[0026] Based on the above technical solution, this application has the following beneficial effects:

[0027] This application discloses a medical barrel-shaped phase change energy storage device, which is a solid-liquid phase change cold storage device using a solid-liquid phase change material as the medium. It utilizes the large amount of latent heat released or absorbed by the phase change material during its phase change, offering advantages such as high cold storage density, stable storage / release temperature, and easy control. This device is applied to the cooling system of a helium compressor in nuclear magnetic resonance (NMR) equipment. When the air-cooled chiller unit malfunctions, especially at night, even if no one notices, the phase change energy storage device can continue to supply cooling water to the helium compressor until the fault is resolved, preventing a cooling water supply interruption and potential magnet failure. Attached Figure Description

[0028] Figure 1 This is a schematic diagram of the medical barrel-shaped energy storage device of this application.

[0029] Figure 2 This is a schematic diagram of the PE horizontal pipe and pipe support structure.

[0030] Figure 3 This is a schematic diagram of the first layer of PE horizontal pipe structure.

[0031] Figure 4 This is a schematic diagram of the second layer of PE horizontal pipe structure.

[0032] Figure label:

[0033] 1. Barrel wall, 2. Insulation material, 3. Outer shell, 4. Drain outlet, 5. Barrel bottom, 6. Barrel lid, 7. Connecting bolts

[0034] 8. PE horizontal pipe; 8-1. Inlet of the first layer PE horizontal pipe; 8-2. Outlet of the first layer PE horizontal pipe; 8-3. Inlet of the second layer PE horizontal pipe; 8-4. Outlet of the second layer PE horizontal pipe; 9. PE riser.

[0035] 10. Water distributor; 11. Water collector.

[0036] 12. Pipe rack, 13. Angle steel, 14. Steel pipe,

[0037] 15. Phase change material; 16. Phase change material liquid surface. Detailed Implementation

[0038] The technical solutions provided in this application will be further described below with reference to specific embodiments and accompanying drawings. The advantages and features of this application will become clearer from the following description.

[0039] A medical barrel-shaped phase change energy storage device, such as Figure 1 As shown, it includes: a tank body, a support structure, several PE horizontal pipes 8, several PE vertical pipes 9, a water distributor 10, a water collector 11, and a phase change material 15. Among them:

[0040] The barrel is enclosed and includes a barrel wall 1, a barrel bottom 5, and a barrel lid 6; the barrel is covered with an outer shell 3, and insulation material 2 is provided between the barrel and the outer shell; a drain outlet 4 is provided on the lower side of the barrel; the barrel is provided with a cooling water inlet pipe and a cooling water outlet pipe.

[0041] The water distributor 10 and the water collector 11 are fixed at the top of the tank. The water distributor 10 is connected to the cooling water inlet pipe, and the water collector 11 is connected to the cooling water outlet pipe.

[0042] The PE horizontal pipes 8 are installed in multiple layers inside the tank through a support structure. Each layer of PE horizontal pipes 8 is in a ring-shaped coil. Each layer of PE horizontal pipes 8 has an inlet and an outlet. The inlet is connected to the water distributor 10 through the PE riser 9, and the outlet is connected to the water collector 11 through the PE riser 9. The inlet and outlet positions of the PE horizontal pipes in adjacent layers are different.

[0043] The cooling water in the cooling water inlet pipe is fed into the PE horizontal pipe 8 of each layer by the water distributor 10; the cooling water in the PE horizontal pipe 8 of each layer is collected by the water collector 11 and then discharged to the cooling water outlet pipe; the multi-layer PE horizontal pipe 8 and PE vertical pipe 9 form multiple cooling water flow branches under the action of the water distributor 10 and the water collector 11.

[0044] The phase change material 15 is filled in the barrel, covering the PE horizontal pipe 8, and is used to store and release cold energy, thereby regulating the temperature.

[0045] Furthermore, the barrel wall 1, barrel bottom 5, and barrel lid 6 of the barrel-shaped phase change energy storage device are made of stainless steel plate. The barrel lid 6 serves a sealing function, isolating the phase change material 15 inside the barrel from the outside air.

[0046] Preferably, the insulation material 2 of the barrel-shaped phase change energy storage device is a 50mm thick rubber and plastic insulation material.

[0047] Furthermore, the outer shell 3 of the barrel-shaped phase change energy storage device is made of color steel plate.

[0048] Furthermore, the drain outlet 4 of the barrel-shaped phase change energy storage device is made of DN25 stainless steel pipe with external threads.

[0049] Furthermore, the barrel wall 1 and the barrel cover 6 of the barrel-shaped phase change energy storage device are connected by connecting bolts 7.

[0050] Specifically, the support structure includes steel pipes 14, several angle steels 13, and several pipe supports 12, wherein:

[0051] The steel pipe 14 is fixed to the center of the bottom of the bucket 5. The angle steel 13 includes an inner angle steel and an outer angle steel. The inner angle steel is fixed to the outer wall of the steel pipe 14, and the outer angle steel is fixed to the bottom of the bucket 5 and adjacent to the bucket wall 1.

[0052] The plurality of pipe supports 12 are arranged in multiple layers, each layer containing multiple pipe supports 12, and the two ends of each pipe support 12 are fixed to the inner angle steel and the outer angle steel respectively.

[0053] The pipe rack 12 has multiple circular holes along its length, the size of which is slightly larger than the outer diameter of the PE horizontal pipe 8, for supporting and positioning the PE horizontal pipe 8.

[0054] The PE horizontal pipe 8 is installed in multiple layers inside the barrel through the pipe rack 12. Each layer of PE horizontal pipe 8 is coiled in a ring around the steel pipe 14 and passes through the round holes on the pipe rack 12 of that layer in sequence.

[0055] Preferably, the pipe rack 12 is made of PP board.

[0056] Furthermore, multiple pipe racks 12 on each layer are evenly distributed on the same horizontal plane, with each pipe rack 12 arranged radially along the barrel body.

[0057] As an example, the steel pipe 14 is fixed to the bottom of the bucket 5 by welding, the inner angle steel is fixed to the steel pipe 14 by welding, the outer angle steel 13 is fixed to the bottom of the bucket 5 by welding, and the pipe rack 12 is fixed to the inner angle steel and the outer angle steel by self-tapping screws.

[0058] Specifically, the PE horizontal pipe 8 has n layers, from bottom to top: the first layer, the second layer, ..., the nth layer. Correspondingly, the water distributor 10 and the water collector 11 are also divided into n branches. One branch of the water distributor 10 is connected to the inlet of the first layer of PE horizontal pipes through a PE riser 9, and the outlet of the first layer of PE horizontal pipes is connected to a branch of the water collector 11 through a PE riser 9, thus forming a cooling water flow branch. By setting the inlet and outlet of the adjacent layers of PE horizontal pipes at different connection positions with the water distributor 10 and the water collector 11, the cooling water flow direction in the adjacent layers of PE horizontal pipes is different. One layer flows in a ring from the center to the periphery, and the other layer flows in a ring from the periphery to the center. This makes the heat exchange between the cooling water in the PE horizontal pipes and the phase change material 15 outside the PE horizontal pipes more uniform and stable.

[0059] like Figure 3 As shown, the first-layer PE horizontal pipe 8 is positioned and supported by the round holes on the first-layer pipe rack 12; the end of the first-layer PE horizontal pipe 8 closest to the steel pipe 14 is the inlet, and the end closest to the barrel wall 1 is the outlet. The inlet 8-1 of the first-layer PE horizontal pipe is connected to the water distributor 10 through a PE riser, and the outlet 8-2 of the first-layer PE horizontal pipe is connected to the water collector 11 through a PE riser. The cooling water in the first-layer PE horizontal pipe 8 flows in a ring from the center to the periphery.

[0060] like Figure 4 As shown, the second-layer PE horizontal pipe 8 is positioned and supported by the round holes on the second-layer pipe rack 12; the end of the second-layer PE horizontal pipe 8 closest to the barrel wall 1 is the inlet, and the end closest to the steel pipe 14 is the outlet. The inlet 8-3 of the second-layer PE horizontal pipe is connected to the water distributor 10 through a PE riser, and the outlet 8-4 of the second-layer PE horizontal pipe is connected to the water collector 11 through a PE riser. The cooling water in the second-layer PE horizontal pipe flows in a ring from the periphery to the center.

[0061] This multi-layered, staggered, and uniformly distributed arrangement can increase the contact area between the PE horizontal pipe 8 and the phase change material 15, resulting in faster heat exchange and more uniform and stable cold exchange.

[0062] The phase change material 15 primarily undergoes a solid-liquid phase change during the phase change process. When the water temperature inside the PE horizontal pipe is lower than the melting point of the phase change material 15, the liquid phase change material solidifies from a liquid state to a solid state. The phase change material 15 absorbs a large amount of cold energy for storage, while the water inside the PE horizontal pipe releases heat, causing its temperature to rise. When the water temperature inside the PE horizontal pipe is higher than the melting point of the phase change material 15, the phase change material 15 changes from a solid state to a liquid state. During this process, the phase change material absorbs a large amount of heat, while the water inside the PE horizontal pipe absorbs heat, causing its temperature to drop. This achieves the storage and release of cold energy, thus playing a role in temperature regulation.

[0063] The PE horizontal pipe is completely submerged below the liquid level of the phase change material by 16 mm, and the liquid level of the phase change material is 45 mm above the top PE horizontal pipe.

[0064] The barrel-shaped phase change cold storage device of this application can be applied to the process cooling water system of medical nuclear magnetic resonance equipment, and can effectively solve the problem of magnet quenching when the chiller unit that provides cooling water to the helium compressor fails.

[0065] The helium compressor requires a continuous supply of cooling water, which is provided by a chiller unit. A cylindrical phase change energy storage device is connected via piping between the chiller unit's outlet and the helium compressor's cooling water inlet. When the chiller unit is running, the low-temperature cooling water passes through the cylindrical phase change energy storage device, where the cold energy is absorbed by the phase change material. The liquid phase change material crystallizes into a solid state, storing the cold energy within it. When the chiller unit malfunctions and stops cooling, the higher-temperature return cooling water passes through the phase change energy storage device, exchanges heat with the phase change material, absorbs the cold energy from the material, and becomes low-temperature cooling water, continuously providing cooling water for the helium compressor. Specifically:

[0066] When the chiller unit is cooling, the low-temperature cooling water passes through the distributor 10, enters the PE riser 9 and PE horizontal pipe 8 from the branch, and then returns to the collector 11 through the PE riser 9. The cooling capacity is absorbed by the phase change material 15 outside the PE riser 9 and PE horizontal pipe 8. The liquid phase change material 15 crystallizes into a solid, storing the cooling capacity in the phase change material 15.

[0067] When the chiller unit fails and stops cooling, the higher temperature cooling water returns through the distributor 10, enters the PE riser 9 and PE horizontal pipe 8 from the branch line, and then returns to the collector 11 through the PE riser 9 to exchange heat with the phase change material 15 and absorb the cold energy in the phase change material 15 to become low temperature cooling water.

[0068] The cooling water supply temperature for the helium compressor in nuclear magnetic resonance (NMR) equipment is typically around 12-18°C. In this application's phase change energy storage device, the phase change material undergoes a phase change at this supply temperature to store cold energy, and the cold energy storage process does not affect the supply of cooling water to the NMR equipment. Preferably, a phase change material with high heat storage density per unit mass, good cycle stability, good thermal stability, and low corrosivity is selected, with a phase change temperature of around 12-18°C. As an example, and not a limitation, the phase change material in this embodiment is a phase change wax with a phase change temperature of 14°C.

[0069] Ice storage requires a water supply temperature below -5°C to store cold, resulting in low cooling efficiency for chiller units. In contrast, the phase change energy storage device of this application can store cold water at a supply temperature of 12-18°C. The phase change material maintains a relatively stable temperature during the phase change process, with gentler temperature changes during charging and discharging, leading to higher cooling efficiency for the chiller unit. Furthermore, when an air-cooled chiller unit malfunctions, especially at night, the phase change energy storage device can continue to supply cooling water to the helium compressor, even if unnoticed. This prevents a cooling water supply interruption in the helium compressor, thus avoiding accidents such as magnet failure.

[0070] The above description is merely a description of preferred embodiments of this application and is not intended to limit the scope of this application in any way. Any changes or modifications made by those skilled in the art based on the above-disclosed technical content should be considered as equivalent and valid embodiments and fall within the scope of protection of the technical solution of this application.

Claims

1. A medical barrel-shaped phase change energy storage device, characterized in that, Includes: tank body, support structure, several PE horizontal pipes (8), several PE vertical pipes (9), water distributor (10), water collector (11), phase change material (15), of which: The barrel is enclosed and includes a barrel wall (1), a barrel bottom (5), and a barrel lid (6); the barrel is provided with an outer shell (3), and a heat insulation material (2) is provided between the barrel and the outer shell; the barrel is provided with a cooling water inlet pipe and a cooling water outlet pipe; The water distributor (10) and the water collector (11) are fixed at the top of the tank. The water distributor (10) is connected to the cooling water inlet pipe, and the water collector (11) is connected to the cooling water outlet pipe. The PE horizontal pipe (8) is installed in multiple layers in the tank through a support structure. Each layer of PE horizontal pipe (8) is coiled in a ring shape. Each layer of PE horizontal pipe (8) has an inlet and an outlet. The inlet is connected to the water distributor (10) through the PE riser (9), and the outlet is connected to the water collector (11) through the PE riser (9). The inlet and outlet positions of the PE horizontal pipes in adjacent layers are different. The cooling water from the cooling water inlet pipe is fed into the PE horizontal pipe (8) of each layer by the water distributor (10); the cooling water in the PE horizontal pipe (8) of each layer is collected by the water collector (11) and then discharged to the cooling water outlet pipe; the multi-layer PE horizontal pipe (8) and PE riser (9) form multiple cooling water flow branches under the action of the water distributor (10) and the water collector (11); The phase change material (15) is filled in the barrel, covering the PE horizontal pipe (8), to realize the storage and release of cold energy and play a role in regulating temperature.

2. The medical barrel-shaped phase change energy storage device as described in claim 1, characterized in that, The lower side of the barrel is provided with a drain outlet (4).

3. The medical barrel-shaped phase change energy storage device as described in claim 1, characterized in that, The support structure includes steel pipes (14), several angle steels (13), and several pipe racks (12), wherein: The steel pipe (14) is fixed to the center of the bottom of the bucket (5). The angle steel (13) includes an inner angle steel and an outer angle steel. The inner angle steel is fixed to the outer wall of the steel pipe (14), and the outer angle steel is fixed to the bottom of the bucket (5) and adjacent to the bucket wall (1). The plurality of pipe supports (12) are arranged in multiple layers, each layer containing multiple pipe supports (12), and the two ends of each pipe support (12) are fixed to the inner angle steel and the outer angle steel respectively; The pipe rack (12) has multiple round holes along its length. The size of the round holes is slightly larger than the outer diameter of the PE horizontal pipe (8) and is used to support and position the PE horizontal pipe (8). The PE horizontal pipe (8) is installed in multiple layers in the barrel through the pipe rack (12). Each layer of PE horizontal pipe (8) is coiled in a ring around the steel pipe (14) and passes through the round hole on the pipe rack (12) of that layer in sequence.

4. The medical barrel-shaped phase change energy storage device as described in claim 3, characterized in that, Multiple pipe racks (12) on each layer are evenly distributed on the same horizontal plane, and each pipe rack (12) is set along the radial direction of the barrel.

5. A medical barrel-shaped phase change energy storage device as described in claim 1, characterized in that, The PE horizontal pipe (8) has n layers, from bottom to top: the first layer, the second layer, ..., the nth layer; correspondingly, the water distributor (10) and the water collector (11) are also divided into n branches. One branch of the water distributor (10) is connected to the inlet of the first layer of PE horizontal pipe through the PE riser (9), and the outlet of the first layer of PE horizontal pipe is connected to a branch of the water collector (11) through the PE riser (9), thus forming a cooling water flow branch; By setting different access positions for the inlet and outlet of the adjacent PE horizontal pipes and the water distributor (10) and water collector (11), the cooling water flow direction in the adjacent PE horizontal pipes is different. One layer flows in a ring from the center to the periphery, and the other layer flows in a ring from the periphery to the center, so that the heat exchange between the cooling water in the PE horizontal pipe and the phase change material (15) outside the PE horizontal pipe is more uniform.

6. A medical barrel-shaped phase change energy storage device as described in claim 3, characterized in that, The first layer of PE horizontal pipe (8) is positioned and supported by the round holes on the first layer of pipe rack (12); the first layer of PE horizontal pipe (8) has an inlet at the end near the steel pipe (14) and an outlet at the end near the barrel wall (1); the inlet (8-1) of the first layer of PE horizontal pipe is connected to the water distributor (10) through the PE riser, and the outlet (8-2) of the first layer of PE horizontal pipe is connected to the water collector (11) through the PE riser; the cooling water in the first layer of PE horizontal pipe (8) flows in a ring from the center to the periphery; The second-layer PE horizontal pipe (8) is positioned and supported by the round hole on the second-layer pipe rack (12); the second-layer PE horizontal pipe (8) has an inlet at one end near the barrel wall (1) and an outlet at the other end near the steel pipe (14); the inlet (8-3) of the second-layer PE horizontal pipe is connected to the water distributor (10) through the PE riser, and the outlet (8-4) of the second-layer PE horizontal pipe is connected to the water collector (11) through the PE riser; the cooling water in the second-layer PE horizontal pipe flows in a ring from the periphery to the center.

7. A medical barrel-shaped phase change energy storage device as described in claim 2, characterized in that, The barrel wall (1), barrel bottom (5), and barrel cover (6) of the barrel-shaped phase change energy storage device are made of stainless steel plate; the outer shell (3) is made of color steel plate; and the drain outlet (4) is made of DN25 stainless steel pipe with external thread.

8. A medical barrel-shaped phase change energy storage device as described in claim 1, characterized in that, The insulation material (2) of the barrel-shaped phase change energy storage device is a 50mm thick rubber and plastic insulation material.

9. A medical barrel-shaped phase change energy storage device as described in claim 3, characterized in that, The pipe rack (12) is made of PP board.

10. A medical barrel-shaped phase change energy storage device as described in claim 1, characterized in that, The phase change material (15) is a solid-liquid phase change material.

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