Medical barrel-shaped phase change energy storage device and process cooling water system applying same

Abstract

The invention provides a medical barrel-shaped phase change energy storage device and a process cooling water system applying the same. The 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, the barrel body is closed and provided with a shell, and a heat preservation 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 inlet is connected with the water segregator through the PE vertical pipe, and the outlet is connected with the water collector through the PE vertical pipe; 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 high cold storage density, stable cold storage / release temperature 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] The present application belongs to the field of process cooling water systems for medical nuclear magnetic resonance equipment, and specifically relates to a barrel-shaped phase change energy storage device and a process cooling water system using the same. Background Art

[0002] The magnet in the nuclear magnetic resonance equipment is a superconducting magnet, which requires liquid helium to maintain low temperature. When part of the liquid helium in the magnet heats up and turns into gas, a certain section or part of the magnet will lose superconductivity and generate resistance. The large amount of current flowing through the coil passes through this section of resistance and generates a large amount of heat to heat the nearby coil, thereby triggering a chain reaction that eventually causes all the main coils to lose their superconducting state and convert the current into heat to heat the liquid helium. The liquid helium evaporates in large quantities, and the helium produced by the evaporation is discharged to the outside through the quench tube. The volume of liquid helium evaporates into helium expands about 700 times, so the helium produced by the evaporation needs to be immediately discharged to the outside through the quench tube, otherwise it will cause personal injury and other malicious incidents. The helium compressor is a key component for liquid helium to maintain low temperature. The helium compressor needs to operate uninterruptedly 24 hours a day for 365 days. The operation of the helium compressor requires uninterrupted supply of cooling water at a certain temperature for 24 hours a day for 365 days. When the chiller that provides cooling water for the helium compressor fails, a magnet quench accident will occur. Therefore, the process cooling water system of the medical MRI equipment needs to provide cooling water continuously and uninterruptedly to ensure the safe operation of the medical MRI equipment. Summary of the invention

[0003] The purpose of the present application is to provide a medical barrel-shaped phase change energy storage device and a process cooling water system using the same, so as to solve the problem of magnet quenching when a chiller providing cooling water for a helium compressor fails.

[0004] To achieve the above objectives, the technical solutions proposed in this application are as follows: A medical barrel-shaped phase change energy storage device comprises: a barrel body, a support structure, a plurality of PE horizontal pipes 8, a plurality of PE vertical pipes 9, a water distributor 10, a water collector 11, and a phase change material 15, wherein: The barrel body is closed, with an outer shell 3 provided outside the barrel body, and a heat-insulating material 2 provided between the barrel body and the outer shell; the barrel body 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 barrel, 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 the barrel in multiple layers through a support structure. Each layer of the PE horizontal pipe 8 is annularly coiled. Each layer of the PE horizontal pipe 8 has an inlet and an outlet. The inlet is connected to the water distributor 10 through a 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 respectively input into the PE horizontal pipe 8 of each layer through the water distributor 10; the cooling water in the PE horizontal pipe 8 of each layer is collected through the water collector 11 and then output to the cooling water outlet pipe; the multi-layer PE horizontal pipe 8 and the PE vertical pipe 9 form a plurality of 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, and its range covers the PE horizontal pipe 8, which is used to store and release cold energy and play a role in regulating the temperature.

[0005] Furthermore, the support structure includes a steel pipe 14, a plurality of angle steels 13, and a plurality of pipe racks 12, wherein: The steel pipe 14 is fixed at the center of the barrel bottom, and the angle steel 13 includes an inner angle steel and an outer angle steel, wherein the inner angle steel is fixed to the outer wall of the steel pipe 14, and the outer angle steel is fixed to the barrel bottom and adjacent to the barrel wall; The plurality of pipe racks 12 are arranged in multiple layers, each layer comprising a plurality of pipe racks 12, and the two ends of each pipe rack 12 are respectively fixed on the inner angle steel and the outer angle steel; The pipe rack 12 is provided with a plurality of circular holes along the length direction, the size of the circular holes being slightly larger than the outer diameter of the PE horizontal pipe 8, for supporting and positioning the PE horizontal pipe 8; The PE horizontal pipes 8 are installed in the barrel in multiple layers through the pipe racks 12 . Each layer of the PE horizontal pipes 8 is coiled in a ring shape with the steel pipe 14 as the center, and passes through the circular holes on the pipe racks 12 of that layer in sequence.

[0006] Furthermore, the PE horizontal pipe 8 has n layers, which are the first layer, the second layer, ..., the nth layer from bottom to top; accordingly, the water distributor 10 and the water collector 11 are also divided into n branches, and one branch of the water distributor 10 is connected to the inlet of a layer of PE horizontal pipes through the PE riser 9, and the outlet of the PE horizontal pipe of this layer is connected to a branch of the water collector 11 through the PE riser 9, thus forming a cooling water flow branch; By setting the inlet and outlet of adjacent layers of PE horizontal pipes at different access positions to the water distributor 10 and the water collector 11, the flow directions of cooling water in adjacent layers of PE horizontal pipes are different. One layer flows in a circular shape from the center to the periphery, and the other layer flows in a circular shape 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.

[0007] Furthermore, the first-layer PE horizontal pipe 8 is positioned and supported by the circular holes on the first-layer pipe rack 12; the end of the first-layer PE horizontal pipe 8 close to the steel pipe 14 is the inlet, and the end close to the barrel wall is the outlet. The first-layer PE horizontal pipe inlet 8-1 is connected to the water distributor 10 through the PE riser, and the first-layer PE horizontal pipe outlet 8-2 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 circular manner from the center to the periphery; The second-layer PE horizontal pipe 8 is positioned and supported by the circular holes on the second-layer pipe rack 12; the end of the second-layer PE horizontal pipe 8 close to the barrel wall is the inlet, and the end close to the steel pipe 14 is the outlet. The second-layer PE horizontal pipe inlet 8-3 is connected to the water distributor 10 through a PE riser, and the second-layer PE horizontal pipe outlet 8-4 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.

[0008] A process cooling water system, including the medical barrel-shaped phase change energy storage device, also includes an air-cooled chiller 20, a helium compressor 22, and a circulating water pump 21, wherein: The water outlet of the air-cooled chiller 20 is connected to the circulating water pump 21 and the water inlet of the barrel-shaped phase-change energy storage device 17 in sequence through the barrel-shaped phase-change energy storage device water inlet pipe 18; the water outlet of the barrel-shaped phase-change energy storage device 17 is connected to the cooling water supply pipe 24 through the barrel-shaped phase-change energy storage device water outlet pipe 19, and the cooling water supply pipe 24 is connected to the water inlet of the helium compressor 22, and the cooling water supply pipe 24 is provided with an emergency switching valve 27; the water outlet of the helium compressor 22 is connected to the water inlet of the air-cooled chiller 20 through the cooling water return pipe 25, and the cooling water return pipe 25 is provided with an emergency switching valve 27 and a Y-type filter 23; The air-cooled chiller 20 is used to cool the cooling water; The helium compressor 22 is a key component of the nuclear magnetic resonance equipment; The circulating water pump 21 is used to pressurize the circulating cooling water; The Y-type filter 23 is used to filter particulate matter and fine particles to protect the normal operation of equipment such as chillers.

[0009] Furthermore, the process cooling water system further includes an emergency tap water device, which includes an emergency tap water valve 26, an emergency tap water inlet pipe 28, and an emergency tap water drain pipe 29, wherein: The emergency tap water inlet pipe 28 is connected to the cooling water supply pipe 24 through the tap water emergency valve 26, and the connection point between the emergency tap water inlet pipe 28 and the cooling water supply pipe 24 is after the emergency switching valve 27 provided on the cooling water supply pipe 24; The emergency tap water drain pipe 29 is connected to the cooling water return pipe 25 through the tap water emergency valve 26 , and the connection point between the emergency tap water drain pipe 29 and the cooling water return pipe 25 is before the emergency switching valve 27 provided on the cooling water return pipe 25 .

[0010] Furthermore, the process cooling water system also includes a bypass water pipe 31 and a valve 30 arranged on the water pipe 31, and the two ends of the bypass water pipe 31 are respectively connected to the cooling water supply pipe 24 and the cooling water return pipe 25, wherein: the connection point of the bypass water pipe 31 and the cooling water supply pipe 24 is before the emergency switching valve 27 arranged on the cooling water supply pipe 24, and the connection point of the bypass water pipe 31 and the cooling water return pipe 25 is after the emergency switching valve 27 arranged on the cooling water return pipe 25.

[0011] Based on the above technical solution, this application has the following beneficial effects: The medical barrel-shaped phase change energy storage device proposed in this application is a solid-liquid phase change cold storage device with solid-liquid phase change material as the medium. It uses the large amount of latent heat released or absorbed by the phase change material when the physical state changes, and has the advantages of high cold storage density, stable cold storage / release temperature, and easy control. The process cooling water system of the nuclear magnetic resonance equipment based on this device can continue to provide cooling water to the helium compressor until the fault is resolved even if no one notices it, when the air-cooled chiller fails, especially at night. This avoids the interruption of cooling water supply to the helium compressor and the occurrence of magnet quenching accidents. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 This is a schematic diagram of the structure of the medical barrel-shaped energy storage device of this application.

[0013] Figure 2 Schematic diagram of PE horizontal pipe and pipe rack structure.

[0014] Figure 3 Schematic diagram of the first layer PE horizontal pipe structure.

[0015] Figure 4 Schematic diagram of the second layer PE horizontal pipe structure.

[0016] Figure 5 Schematic diagram of the process cooling water system for the nuclear magnetic resonance equipment based on the barrel-shaped phase change energy storage device.

[0017] Reference numerals: 1. Barrel wall, 2. Insulation material, 3. Shell, 4. Drain port, 5. Barrel bottom, 6. Barrel cover, 7. Connecting bolts, 8. PE horizontal pipe, 8-1. First layer PE horizontal pipe inlet, 8-2. First layer PE horizontal pipe outlet, 8-3. Second layer PE horizontal pipe inlet, 8-4. Second layer PE horizontal pipe outlet, 9. PE vertical pipe, 10. Water distributor, 11. Water collector, 12. Pipe rack, 13. Angle steel, 14. Steel pipe, 15. Phase change material, 16. Phase change material liquid level, 17. Barrel-shaped phase change energy storage device, 18. Cooling water inlet pipe of barrel-shaped phase change energy storage device, 19. Cooling water outlet pipe of barrel-shaped phase change energy storage device, 20. Air-cooled chiller, 21. Circulating water pump, 22. Helium compressor, 23. Y-type filter, 24. Cooling water supply pipe, 25. Cooling water return pipe, 26. Tap water emergency valve, 27. Emergency switching valve, 28. Emergency tap water inlet pipe, 29. Emergency tap water drain pipe, 30. Bypass valve, 31. Bypass pipe. DETAILED DESCRIPTION

[0018] The technical solution provided by the present application will be further described below in conjunction with specific embodiments and accompanying drawings. The advantages and features of the present application will become more apparent with the following description.

[0019] Example 1 A medical barrel-shaped phase change energy storage device, such as Figure 1 As shown, it includes: a barrel, a support structure, a plurality of PE horizontal pipes 8, a plurality of PE vertical pipes 9, a water distributor 10, a water collector 11, and a phase change material 15. Among them: The barrel body is closed, including a barrel wall 1, a barrel bottom 5, and a barrel cover 6; an outer shell 3 is provided outside the barrel body, and a heat-insulating material 2 is provided between the barrel body and the outer shell; a sewage outlet 4 is provided at the lower side of the barrel body; and a cooling water inlet pipe and a cooling water outlet pipe are provided in the barrel body; The water distributor 10 and the water collector 11 are fixed at the top of the barrel, 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 the barrel in multiple layers through a support structure. Each layer of the PE horizontal pipe 8 is annularly coiled. Each layer of the PE horizontal pipe 8 has an inlet and an outlet. The inlet is connected to the water distributor 10 through a 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 of adjacent layers are different. The cooling water from the cooling water inlet pipe is respectively input into the PE horizontal pipe 8 of each layer through the water distributor 10; the cooling water in the PE horizontal pipe 8 of each layer is collected through the water collector 11 and then output to the cooling water outlet pipe; the multi-layer PE horizontal pipe 8 and the PE vertical pipe 9 form a plurality of 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, and its range covers the PE horizontal pipe 8, which is used to store and release cold energy and play a role in regulating the temperature.

[0020] 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 plates. The barrel cover 6 plays a sealing role, isolating the phase change material 15 in the barrel from the outside air.

[0021] Preferably, the insulation material 2 of the barrel-shaped phase-change energy storage device is made of 50 mm thick rubber-plastic insulation material.

[0022] Furthermore, the shell 3 of the barrel-shaped phase-change energy storage device is made of color-coated steel plate.

[0023] Furthermore, the sewage outlet 4 of the barrel-shaped phase-change energy storage device is made of a DN25 stainless steel pipe with an external thread.

[0024] 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.

[0025] Specifically, the support structure includes a steel pipe 14, a plurality of angle steels 13, and a plurality of pipe racks 12, wherein: The steel pipe 14 is fixed to the center of the barrel bottom 5, and the angle steel 13 includes an inner angle steel and an outer angle steel, wherein the inner angle steel is fixed to the outer wall of the steel pipe 14, and the outer angle steel is fixed to the barrel bottom 5 and adjacent to the barrel wall 1; The plurality of pipe racks 12 are arranged in multiple layers, each layer comprising a plurality of pipe racks 12, and the two ends of each pipe rack 12 are respectively fixed on the inner angle steel and the outer angle steel; The pipe rack 12 is provided with a plurality of circular holes along the length direction, the size of the circular holes being slightly larger than the outer diameter of the PE horizontal pipe 8, for supporting and positioning the PE horizontal pipe 8; The PE horizontal pipes 8 are installed in the barrel in multiple layers through the pipe racks 12 . Each layer of the PE horizontal pipes 8 is coiled in a ring shape with the steel pipe 14 as the center, and passes through the circular holes on the pipe racks 12 of that layer in sequence.

[0026] Preferably, the pipe rack 12 is made of PP board.

[0027] Furthermore, the multiple pipe racks 12 of each layer are evenly distributed on the same horizontal plane, and each pipe rack 12 is arranged along the radial direction of the barrel body.

[0028] As an embodiment, the steel pipe 14 is fixed to the barrel bottom 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 barrel bottom 5 by welding, and the pipe rack 12 is fixed to the inner angle steel and the outer angle steel by self-tapping screws.

[0029] Specifically, 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 a layer of PE horizontal pipes through the PE riser 9, and the outlet of the PE horizontal pipe of this layer is connected to a branch of the water collector 11 through the PE riser 9, so as to form a cooling water flow branch. By setting the inlet and outlet of the adjacent layers of PE horizontal pipes and the access positions of the water distributor 10 and the water collector 11 to be different, the flow direction of the cooling water in the adjacent layers of PE horizontal pipes is different, one layer flows in a circular manner from the center to the periphery, and the other layer flows in a circular manner 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 and stable.

[0030] like Figure 3 As shown, the first-layer PE horizontal pipe 8 is positioned and supported by the circular holes on the first-layer pipe rack 12; the end of the first-layer PE horizontal pipe 8 close to the steel pipe 14 is the inlet, and the end close to the barrel wall 1 is the outlet. The first-layer PE horizontal pipe inlet 8-1 is connected to the water distributor 10 through a PE riser, and the first-layer PE horizontal pipe outlet 8-2 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 circular manner from the center to the periphery.

[0031] like Figure 4 As shown, the second-layer PE horizontal pipe 8 is positioned and supported by the circular hole on the second-layer pipe rack 12; the second-layer PE horizontal pipe 8 has an inlet at one end close to the barrel wall 1 and an outlet at one end close to the steel pipe 14; the second-layer PE horizontal pipe inlet 8-3 is connected to the water distributor 10 through a PE riser, and the second-layer PE horizontal pipe outlet 8-4 is connected to the water collector 11 through a PE riser. The cooling water in the second-layer PE horizontal pipe flows in a circular manner from the periphery to the center.

[0032] Through this multi-layer, staggered, and evenly distributed arrangement, the contact area between the PE horizontal pipe 8 and the phase change material 15 can be increased to a greater extent, the heat exchange speed is faster, and the cold exchange is more uniform and stable.

[0033] The phase change material 15 mainly undergoes a solid-liquid phase change during the phase change process. When the water temperature in the PE horizontal pipe is lower than the melting point of the phase change material 15, the liquid phase change material solidifies from liquid to solid, the phase change material 15 absorbs a large amount of cold energy and stores cold energy, the water in the PE horizontal pipe releases heat, and the temperature rises. When the water temperature in the PE horizontal pipe is higher than the melting point of the phase change material 15, the phase change material 15 will change from solid to liquid. In this process, the phase change material will absorb a large amount of heat, the water in the PE horizontal pipe absorbs heat, and the temperature decreases. This achieves the storage and release of cold energy and plays a role in regulating the temperature.

[0034] The PE horizontal pipes are all immersed below the phase change material liquid level 16, and the phase change material liquid level is 45 mm higher than the top PE horizontal pipe.

[0035] The barrel-shaped phase-change cold storage device of the present 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 a chiller that provides cooling water for a helium compressor fails.

[0036] The operation of the helium compressor requires a continuous supply of cooling water, and the chiller provides it with cooling water. The barrel-shaped phase change cold storage device is connected between the water outlet of the chiller and the cooling water inlet of the helium compressor through a pipe. When the chiller is running, the low-temperature cooling water passes through the barrel-shaped phase change cold storage device, and the cold energy is absorbed by the phase change material in the barrel-shaped phase change cold storage device. The liquid phase change material crystallizes into a solid state and stores the cold energy in the phase change material. When the chiller fails and stops refrigeration, the higher temperature cooling water returns through the phase change energy storage device to exchange heat with the phase change material, absorbs the cold energy in the phase change material and turns into low-temperature cooling water, continuously and uninterruptedly providing cooling water for the helium compressor. Specifically: When the chiller is cooling, low-temperature cooling water passes through the water distributor 10, enters the PE riser 9 and the PE horizontal pipe 8 from the branch road, and then returns to the water collector 11 through the PE riser 9. The cold energy is absorbed by the phase change material 15 outside the PE riser 9 and the PE horizontal pipe 8, and the liquid phase change material 15 crystallizes into a solid state, storing the cold energy in the phase change material 15.

[0037] When the chiller stops refrigerating due to a fault, the cooling water return water with a higher temperature passes through the water distributor 10, enters the PE riser 9 and the PE horizontal pipe 8 from the branch road, and then returns to the water collector 11 through the PE riser 9, exchanges heat with the phase change material 15, and absorbs the cold energy in the phase change material 15 to become low-temperature cooling water.

[0038] The cooling water supply temperature of the helium compressor of the nuclear magnetic resonance equipment is usually around 12~18℃. The phase change material in the phase change energy storage device undergoes phase change at this water supply temperature to achieve cold storage. The cold storage process does not affect the supply of cooling water for the nuclear magnetic resonance equipment. Preferably, a phase change material with high cold storage density per unit mass, good cycle stability, good thermal stability and low corrosiveness is selected, and the phase change temperature is around 12~18℃. By way of example and not limitation, the phase change material in the embodiment is phase change wax, and the phase change temperature is 14℃.

[0039] Ice storage requires a water supply temperature below -5°C to store cold, and the refrigeration efficiency of the chiller is low. Compared with ice storage devices, the phase change storage device of the present application can store cold at a water supply temperature of 12~18°C, the temperature of the phase change material is relatively stable during the phase change process, and the temperature changes are relatively gentle during the charging and discharging process, and the refrigeration efficiency of the chiller is high. When an air-cooled chiller fails, especially at night, even if no one notices it, the phase change energy storage device of the present application can continue to provide cooling water for the helium compressor. This avoids the interruption of cooling water supply to the helium compressor and the occurrence of magnet quenching accidents.

[0040] Example 2 This embodiment is based on the application of the barrel-shaped phase-change cold storage device of Embodiment 1.

[0041] A process cooling water system for a nuclear magnetic resonance device using the barrel-shaped phase change cold storage device, such as Figure 5 As shown, it includes an air-cooled chiller 20, a helium compressor 22, a barrel-shaped phase change energy storage device 17, a circulating water pump 21, and emergency tap water equipment. Among them: The water outlet of the air-cooled chiller 20 is connected to the circulating water pump 21 and the water inlet of the barrel-shaped phase change energy storage device 17 in sequence through the barrel-shaped phase change energy storage device water inlet pipe 18; the water outlet of the barrel-shaped phase change energy storage device 17 is connected to the cooling water supply pipe 24 through the barrel-shaped phase change energy storage device water outlet pipe 19, and the cooling water supply pipe 24 is connected to the water inlet of the helium compressor 22, and the cooling water supply pipe 24 is provided with an emergency switching valve 27; the water outlet of the helium compressor 22 is connected to the water inlet of the air-cooled chiller 20 through the cooling water return pipe 25, and the cooling water return pipe 25 is provided with an emergency switching valve 27 and a Y-type filter 23.

[0042] The emergency tap water equipment includes an emergency tap water inlet pipe 28, an emergency tap water drain pipe 29, and a tap water emergency valve 26, wherein: the emergency tap water inlet pipe 28 is connected to the cooling water supply pipe 24 through the tap water emergency valve 26, and the connection point between the emergency tap water inlet pipe 28 and the cooling water supply pipe 24 is after the emergency switching valve 27 arranged on the cooling water supply pipe 24; the emergency tap water drain pipe 29 is connected to the cooling water return pipe 25 through the tap water emergency valve 26, and the connection point between the emergency tap water drain pipe 29 and the cooling water return pipe 25 is before the emergency switching valve 27 arranged on the cooling water return pipe 25.

[0043] The air-cooled chiller 20 is used to cool the cooling water. The helium compressor 22 is a key component of the nuclear magnetic resonance equipment and requires cooling water to cool it. The Y-type filter 23 is used to filter particulate matter and fine particles to protect the normal operation of the chiller and other equipment. The circulating water pump 21 is used to pressurize the circulating cooling water.

[0044] The above-mentioned process cooling water system has three operation modes, namely normal operation, cold storage and cooling, and emergency refrigeration. These three modes can continuously and uninterruptedly provide cooling water for the helium compressor. Specifically: Normal operation: The tap water emergency valves 26 arranged on the emergency tap water inlet pipe 28 and the emergency tap water drain pipe 29 are both in the closed state, and the emergency switching valves 27 arranged on the cooling water supply pipe 24 and the cooling water return pipe 25 are both in the open state, and the air-cooled chiller 20 provides cooling water for the helium compressor 22 to cool down. Specifically, the air-cooled chiller 20 cools down the cooling water, and the low-temperature cooling water enters the barrel-shaped phase change cold storage device 17 under the pressurization of the circulating water pump 21. The phase change material 15 in the barrel-shaped phase change cold storage device stores part of the cooling water. After the cooling water comes out of the barrel-shaped phase change cold storage device 17, it flows into the helium compressor. After cooling the helium compressor 22, the heated cooling water flows out of the helium compressor 22, and after being filtered by the Y-type filter 23 arranged on the cooling water return pipe 25, it enters the air-cooled chiller 20. The air-cooled chiller 20 cools down the cooling water and starts a new round of cooling water circulation.

[0045] Cold storage and cooling: When the air-cooled chiller 20 fails and cannot operate for refrigeration, the barrel-shaped phase change energy storage device 17 releases the stored cold energy to continue to provide cooling water for the helium compressor 22.

[0046] Emergency refrigeration: If the air-cooled chiller 20 eliminates the fault and resumes normal refrigeration before the cold energy stored in the phase change energy storage device 17 is released, it will continue to operate in the normal operation mode; if the cold energy stored in the barrel-shaped phase change energy storage device 17 is fully released, and the air-cooled chiller 20 cannot operate due to the fault that has not been eliminated, close the emergency switching valve 27 provided on the cooling water supply pipe 24 and the cooling water return pipe 25, and open the tap water emergency valve 26 provided on the emergency tap water inlet pipe 28 and the emergency tap water drain pipe 29, and use tap water as the emergency cooling water of the helium compressor 22 to implement emergency refrigeration on the helium compressor to avoid magnet quenching.

[0047] When the fault of the air-cooled chiller 20 is eliminated and normal refrigeration operation is restored, the emergency switching valve 27 arranged on the cooling water supply pipe 24 and the cooling water return pipe 25 is opened, and the tap water emergency valve 26 arranged on the emergency tap water inlet pipe 28 and the emergency tap water drain pipe 29 is closed at the same time, and the normal operation mode is restored. The air-cooled chiller 20 provides cooling water for the helium compressor 22, and the barrel-shaped phase change energy storage device 17 starts to store cold again.

[0048] Furthermore, the process cooling water system further includes a bypass water pipe 31 and a bypass valve 30 disposed on the bypass water pipe 31, wherein both ends of the bypass water pipe 31 are respectively connected to the cooling water supply pipe 24 and the cooling water return pipe 25, wherein the connection point between the bypass water pipe 31 and the cooling water supply pipe 24 is before the emergency switching valve 27 disposed on the cooling water supply pipe 24, and the connection point between the bypass water pipe 31 and the cooling water return pipe 25 is after the emergency switching valve 27 disposed on the cooling water return pipe 25. The bypass valve 30 and the bypass pipe 31 are only used during system cleaning and startup and debugging, and are not used at other times.

[0049] When the air-cooled chiller 20 is installed and the system is cleaned and debugged for the first time, the emergency switching valve 27 arranged on the cooling water supply pipe 24 and the cooling water return pipe 25 is closed, and the bypass valve 30 is opened. The cooling water circulates in the loop formed by the chiller 20, the circulating water pump 21, the barrel-shaped phase change energy storage device 17, the cooling water supply pipe 24, the bypass pipe 31, the cooling water return pipe 25, and the Y-type filter 23, and does not enter the helium compressor 22, so as to prevent impurities in the water from entering the helium compressor 22 during system cleaning and debugging, thereby protecting the helium compressor 22.

[0050] Furthermore, the barrel-shaped phase change energy storage device of the present application is not limited to the application in the medical field. It can be applied to other fields by selecting phase change materials with different phase change temperatures and phase change properties to provide cooling water services for its equipment. For example, it is applied to places with time-of-use electricity prices such as large shopping malls, hotels, hospitals, schools, office buildings, industrial parks, and data centers: the chiller is turned on for refrigeration at night (off-peak electricity period), and the chilled water absorbs cold energy through the chiller, so that the phase change material in the barrel-shaped phase change energy storage device crystallizes and stores the cold energy in the phase change material. During the day (peak electricity period), the chiller is stopped, and the chilled water exchanges the cold energy in the phase change material through the barrel-shaped phase change energy storage device to provide cooling for the end user, thereby achieving the purpose of shifting peak electricity and filling valley electricity, and saving the operating costs of the air conditioning system. Since the phase change material cold storage system is crystallized at a temperature above 0°C, and stores and releases the latent heat in the phase change material, it can fundamentally overcome the shortcomings of traditional water cold storage and ice cold storage, and make up for the problems of high cold storage construction cost, large floor space, and difficulty in transformation. The barrel-shaped phase change energy storage device can also provide air conditioning services for emergency support sites.

[0051] The above description is only a description of the preferred embodiments of the present application, and is not intended to limit the scope of the present application. Any changes or modifications made by any person skilled in the art based on the above disclosed technical contents shall be deemed as equivalent effective embodiments and shall fall within the scope of protection of the technical solution of the present application.

Claims

1. A medical barrel-shaped phase change energy storage device, characterized in that: It comprises: a barrel, a support structure, a plurality of PE horizontal pipes (8), a plurality of PE vertical pipes (9), a water distributor (10), a water collector (11), and a phase change material (15), wherein: The barrel body is a closed type, with an outer shell (3) provided outside the barrel body, and a heat-insulating material (2) provided between the barrel body and the outer shell; the barrel body 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 barrel body, 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 the barrel body in multiple layers through a support structure. Each layer of the PE horizontal pipe (8) is in a ring-shaped coil. Each layer of the PE horizontal pipe (8) has an inlet and an outlet. The inlet is connected to the water distributor (10) through a 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 respectively input into each layer of the PE horizontal pipe (8) through the water distributor (10); the cooling water in each layer of the PE horizontal pipe (8) is collected through the water collector (11) and then output to the cooling water outlet pipe; the multiple layers of PE horizontal pipes (8) and PE vertical pipes (9) form a plurality of 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, and its range covers the PE horizontal pipe (8), and is used to achieve the storage and release of cold energy, thereby playing a role in regulating the temperature.

2. A medical barrel-shaped phase change energy storage device as claimed in claim 1, characterized in that: The support structure comprises a steel pipe (14), a plurality of angle steels (13), and a plurality of pipe racks (12), wherein: The steel pipe (14) is fixed at the center of the barrel bottom, and the angle steel (13) comprises an inner angle steel and an outer angle steel, wherein the inner angle steel is fixed to the outer wall of the steel pipe (14), and the outer angle steel is fixed to the barrel bottom and adjacent to the barrel wall; The plurality of pipe racks (12) are arranged in multiple layers, each layer comprising a plurality of pipe racks (12), and both ends of each pipe rack (12) are respectively fixed to an inner angle steel and an outer angle steel; The pipe rack (12) is provided with a plurality of circular holes along the length direction, the size of the circular holes being slightly larger than the outer diameter of the PE horizontal pipe (8), and being used to support and position the PE horizontal pipe (8); The PE horizontal pipe (8) is installed in the barrel body in multiple layers via a pipe rack (12). Each layer of the PE horizontal pipe (8) is coiled in a ring shape with the steel pipe (14) as the center, and passes through the circular holes on the pipe rack (12) of that layer in sequence.

3. A medical barrel-shaped phase change energy storage device as claimed in claim 1, characterized in that: 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 a layer of PE horizontal pipes through a PE riser (9), and the outlet of the PE horizontal pipe of this layer is connected to a branch of the water collector (11) through the PE riser (9), thereby forming a cooling water flow branch; By setting the inlet and outlet of adjacent layers of PE horizontal pipes to be connected to the water distributor (10) and the water collector (11) at different locations, the cooling water in adjacent layers of PE horizontal pipes flows in different directions, with one layer flowing in a circular direction from the center to the periphery and the other layer flowing in a circular direction 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.

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

5. A process cooling water system, characterized in that: The medical barrel-shaped phase-change energy storage device comprises the medical barrel-shaped phase-change energy storage device as claimed in any one of claims 1 to 4, and further comprises an air-cooled chiller (20), a helium compressor (22), and a circulating water pump (21), wherein: The water outlet of the air-cooled chiller (20) is connected to the circulating water pump (21) and the water inlet of the barrel-shaped phase-change energy storage device (17) in sequence through the barrel-shaped phase-change energy storage device water inlet pipe (18); the water outlet of the barrel-shaped phase-change energy storage device (17) is connected to the cooling water supply pipe (24) through the barrel-shaped phase-change energy storage device water outlet pipe (19), the cooling water supply pipe (24) is connected to the water inlet of the helium compressor (22), and the cooling water supply pipe (24) is provided with an emergency switching valve (27); the water outlet of the helium compressor (22) is connected to the water inlet of the air-cooled chiller (20) through the cooling water return pipe (25), and the cooling water return pipe (25) is provided with an emergency switching valve (27) and a Y-type filter (23); The air-cooled chiller (20) is used to cool the cooling water; The helium compressor (22) is a key component of a nuclear magnetic resonance device; The circulating water pump (21) is used to pressurize the circulating cooling water; The Y-type filter (23) is used to filter particulate matter and fine particles to protect the normal operation of equipment such as a chiller.

6. A process cooling water system according to claim 5, characterized in that: It also includes emergency tap water equipment, which includes an emergency tap water valve (26), an emergency tap water inlet pipe (28), and an emergency tap water outlet pipe (29), wherein: The emergency tap water inlet pipe (28) is connected to the cooling water supply pipe (24) through the tap water emergency valve (26), and the connection point between the emergency tap water inlet pipe (28) and the cooling water supply pipe (24) is located after the emergency switching valve (27) provided on the cooling water supply pipe (24); The emergency tap water drainage pipe (29) is connected to the cooling water return pipe (25) via the tap water emergency valve (26), and the connection point between the emergency tap water drainage pipe (29) and the cooling water return pipe (25) is before the emergency switching valve (27) provided on the cooling water return pipe (25).

7. A process cooling water system according to claim 5, characterized in that: Cold storage and refrigeration based on barrel-shaped phase change energy storage device: Under normal circumstances, the air-cooled chiller (20) cools and lowers the temperature of the cooling water. The low-temperature cooling water enters the barrel-shaped phase-change cold storage device (17) under the pressure of the circulating water pump (21). The phase-change material (15) in the barrel-shaped phase-change cold storage device stores part of the coldness of the cooling water. After the cooling water flows out of the barrel-shaped phase-change cold storage device (17), it flows into the helium compressor. After cooling the helium compressor (22), the heated cooling water flows out of the helium compressor (22), is filtered by the Y-type filter (23) arranged on the cooling water return pipe (25), and then enters the air-cooled chiller (20). The air-cooled chiller (20) cools and lowers the temperature of the cooling water, and a new round of cooling water circulation begins. When the air-cooled chiller (20) fails and cannot operate for refrigeration, the barrel-shaped phase-change energy storage device (17) releases the stored cold energy and continues to provide cooling water for the helium compressor (22).

8. A process cooling water system according to claim 6, characterized in that: There are three operation modes: normal operation, cold storage and cooling, and emergency refrigeration. These three modes can continuously provide cooling water for the helium compressor. Specifically: Normal operation: the two tap water emergency valves (26) are both in a closed state, the two emergency switching valves 27 are both in an open state, the air-cooled chiller (20) provides cooling water for the helium compressor (22) to cool down, and the barrel-shaped phase change energy storage device stores cold energy; Cold storage and cooling: when the air-cooled chiller (20) fails and cannot operate for cooling, the barrel-shaped phase change energy storage device 17 releases the stored cold energy to continue to provide cooling water for the helium compressor (22); Emergency refrigeration: If the air-cooled chiller (20) eliminates the fault and resumes normal refrigeration before the cold energy stored in the phase change energy storage device (17) is completely released, it continues to operate in the normal operation mode; if the cold energy stored in the barrel-shaped phase change energy storage device (17) is completely released, and the air-cooled chiller (20) cannot operate because the fault has not been eliminated, the emergency switching valve (27) provided on the cooling water supply pipe (24) and the cooling water return pipe (25) is closed, and the tap water emergency valve (26) provided on the emergency tap water inlet pipe (28) and the emergency tap water drain pipe (29) is opened, and the tap water is used as the emergency cooling water of the helium compressor (22) to implement emergency refrigeration on the helium compressor to avoid magnet quenching; When the fault of the air-cooled chiller (20) is eliminated and normal refrigeration operation is restored, the emergency switching valve (27) provided on the cooling water supply pipe (24) and the cooling water return pipe (25) is opened, and the tap water emergency valve (26) provided on the emergency tap water inlet pipe (28) and the emergency tap water drain pipe (29) is closed, and the normal operation mode is restored. The air-cooled chiller (20) provides cooling water for the helium compressor (22), and the barrel-shaped phase change energy storage device (17) starts to store cold again.

9. A process cooling water system according to claim 5, characterized in that: It also includes a bypass water pipe (31) and a valve (30) arranged on the bypass water pipe (31), wherein two ends of the bypass water pipe (31) are respectively connected to the cooling water supply pipe (24) and the cooling water return pipe (25), wherein: the connection point between the bypass water pipe (31) and the cooling water supply pipe (24) is before the emergency switching valve (27) arranged on the cooling water supply pipe (24), and the connection point between the bypass water pipe (31) and the cooling water return pipe (25) is after the emergency switching valve (27) arranged on the cooling water return pipe (25).

10. A process cooling water system according to claim 9, characterized in that: The bypass water pipe (31) and the bypass valve (30) are used to implement system cleaning and debugging, specifically: the emergency switching valve (27) disposed on the cooling water supply pipe (24) and the cooling water return pipe (25) is closed, the bypass valve (30) is opened, and the cooling water circulates in a loop formed by the chiller (20), the circulating water pump (21), the barrel-shaped phase change energy storage device (17), the cooling water supply pipe (24), the bypass pipe (31), the cooling water return pipe (25), and the Y-type filter (23), and does not enter the helium compressor (22), thereby preventing impurities in the system cleaning and debugging water from entering the helium compressor (22), thereby protecting the helium compressor (22).

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