A refrigeration appliance

Abstract

The utility model provides a kind of refrigeration equipment, it is related to low temperature refrigeration technical field, first through precooling device, the temperature of cold source medium is reduced to the first temperature close to extremely low temperature, subsequently utilize deep cooling device, the temperature of cold source medium is further reduced to the second temperature of extremely low temperature, precooling device can be selected from normal temperature refrigeration to the refrigeration equipment of approaching extremely low temperature and lower cost, so it guarantees the efficiency of overall cooling, and the cost of reducing from normal temperature to the first temperature is reduced, and the overall cooling cost of superconducting material is reduced.

Description

Technical Field

[0001] This utility model relates to the field of cryogenic refrigeration technology, and more specifically, to a refrigeration device. Background Technology

[0002] Superconducting materials possess properties such as zero electrical resistance and perfect diamagnetism, demonstrating enormous application potential in numerous fields including nuclear fusion, power transmission, medical devices, and scientific research. However, the superconducting state typically requires extremely low temperatures to be maintained, making cryogenics a crucial support for the application of superconducting technology.

[0003] Currently, most cooling devices rely solely on cryogenic chillers, such as GM-type cryogens, as the cold source medium to lower the material to extremely low temperatures and achieve superconductivity. However, while cryogenic chillers perform excellently in extremely low-temperature environments ranging from 10K to 80K, they exhibit slow start-up and low cooling rates when cooling from room temperature (300K) to 80K. Furthermore, using multiple GM-type cryogens in parallel for cooling would result in prohibitively high costs. Therefore, balancing the cooling rate and cost of superconducting materials is a crucial technical problem that urgently needs to be solved by those skilled in the art. Utility Model Content

[0004] In view of this, the present invention provides a refrigeration device, including a cryogenic device, a precooling device, and a cold source pipeline; The cold source pipeline passes through the precooling device and the cryogenic device. The cold source pipeline is used to carry the cold source medium. The precooling device is used to cool the cold source medium to a first temperature. The cryogenic device is used to cool the cold source medium to a second temperature, which is lower than the first temperature.

[0005] In one embodiment, the refrigeration equipment further includes a first cold material interface and a second cold material interface for connecting the material to be cooled; the cold source pipeline includes a first pipeline, a second pipeline, a third pipeline, and a fourth pipeline connected in sequence; the first pipeline, the second pipeline, and the third pipeline are connected in sequence, the first pipeline passes through the cryogenic device and the end of the first pipeline away from the second pipeline is connected to the first cold material interface, the second pipeline passes through the precooling device, and the third pipeline is connected to the second cold material interface; wherein, one end of the fourth pipeline is connected to the port of the first pipeline away from the first cold material interface, and the other end of the fourth pipeline is connected to the port of the third pipeline away from the second cold material interface, and a first valve is provided on the fourth pipeline; a second valve is provided at the end of the second pipeline near the first pipeline, and / or, a second valve is provided at the end of the second pipeline near the third pipeline.

[0006] In one embodiment, the first pipeline is further provided with a first temperature detector near the first cold material interface; and / or, the third pipeline is further provided with a second temperature detector near the second cold material interface.

[0007] In one embodiment, a fan is provided on the first pipeline.

[0008] In one embodiment, the refrigeration equipment further includes a pressure sensor located at at least one end of the fan.

[0009] In one embodiment, the precooling device includes a first cavity for containing a precooling medium, and at least a portion of the second pipeline is disposed within the first cavity; wherein a third temperature detector and a fourth temperature detector are respectively disposed on the outer side wall of the first cavity near the top and near the bottom ends.

[0010] In one embodiment, the refrigeration equipment further includes a thermal insulation device surrounding at least a portion of the first conduit and at least a portion of the third conduit.

[0011] In one embodiment, the heat insulation device includes a second cavity, a fifth pipe surrounding the outer wall of the second cavity, and a heat insulation shell surrounding the fifth pipe and the second cavity, wherein a precooling medium is provided in the fifth pipe; wherein at least a portion of the first pipe and at least a portion of the third pipe are both disposed in the second cavity.

[0012] In one embodiment, the refrigeration device further includes a first vacuum valve disposed on the heat insulation housing to discharge air between the second cavity and the heat insulation housing.

[0013] In one embodiment, the first temperature is 70K to 90K, and the second temperature is less than 30K.

[0014] The beneficial effects of the refrigeration equipment of this utility model are as follows: First, the temperature of the cold source medium is reduced to a first temperature close to the extremely low temperature through the pre-cooling device. Then, the temperature of the cold source medium is further reduced to a second temperature of extremely low temperature using the cryogenic device. The pre-cooling device can be a refrigeration device that can cool from room temperature to near the extremely low temperature and has a low cost. When cooling from room temperature to the first temperature, there is no need for multiple expensive cryogenic devices to be connected in parallel for cooling. This ensures the overall cooling efficiency and reduces the cost of cooling from room temperature to the first temperature, thereby reducing the overall cooling cost of the superconducting material. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the structural connection of the refrigeration equipment in an embodiment of this utility model; Figure 2This is another structural connection diagram of the refrigeration equipment in this embodiment of the present utility model; Figure 3 This is a schematic diagram of the structure of a refrigeration device in an embodiment of the present utility model; Figure 4 This is another structural schematic diagram of the refrigeration equipment in this utility model embodiment; Figure 5 This is a schematic diagram of another structure of the refrigeration equipment in an embodiment of this utility model.

[0016] Explanation of reference numerals in the attached figures: Refrigeration equipment 10; cryogenic device 20; precooling device 30; first cavity 31; insulation shell 32; cold source pipeline 40; first pipeline 41; second pipeline 42; third pipeline 43; fourth pipeline 44; first valve 45; second valve 46; first cold material interface 51; second cold material interface 52; first temperature detector 61; second temperature detector 62; third temperature detector 63; fourth temperature detector 64; fifth temperature detector 65; fan 71; pressure sensor 72; insulation device 80; second cavity 81; fifth pipeline 82; insulation shell 83; first vacuum valve 84; first medium valve 91; second medium valve 92; third medium valve 93. Detailed Implementation

[0017] To make the above-mentioned objects, features, and advantages of this utility model more apparent and understandable, specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings. Although some embodiments of this utility model are shown in the drawings, it should be understood that this utility model can be implemented in various forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided to provide a more thorough and complete understanding of this utility model. It should be understood that the drawings and embodiments of this utility model are for illustrative purposes only and are not intended to limit the scope of protection of this utility model.

[0018] The term "comprising" and its variations as used herein are open-ended, meaning "including but not limited to"; the term "based on" means "at least partially based on"; the term "one embodiment" means "at least one embodiment"; the term "another embodiment" means "at least one additional embodiment"; and the term "some embodiments" means "at least some embodiments". Definitions of other terms will be given in the following description. It should be noted that the concepts of "first," "second," etc., mentioned in this utility model are only used to distinguish different devices, modules, or units, and are not intended to limit the order of functions performed by these devices, modules, or units or their interdependencies.

[0019] It should be noted that the terms "one" and "multiple" used in this utility model are illustrative rather than restrictive. Those skilled in the art should understand that, unless otherwise expressly indicated in the context, they should be understood as "one or more".

[0020] Superconducting materials possess properties such as zero resistance and perfect diamagnetism, demonstrating enormous application potential in numerous fields including nuclear fusion, power transmission, medical devices, and scientific research. However, the superconducting state typically requires extremely low temperatures to be maintained, making cryogenic cooling a crucial support for the application of superconducting technology. Currently, most cooling devices rely solely on cryogenic compressors, such as GM-type cryogens, as the cold source medium to cool the material to extremely low temperatures to achieve superconductivity. While cryogenic compressors perform excellently in extremely low-temperature environments ranging from 10K to 80K, GM-type cryogens exhibit slow start-up and low cooling rates when cooling from room temperature (300K) to 80K. Furthermore, using multiple GM-type cryogens in parallel for cooling results in prohibitively high costs. Therefore, balancing the cooling rate and cost of superconducting materials is a critical technical problem that urgently needs to be solved by those skilled in the art.

[0021] In response to the problems existing in the aforementioned related technologies, and in combination with Figures 1 to 5 As shown, this utility model provides a refrigeration device 10. First, the temperature of the cold source medium is lowered to a first temperature close to the extremely low temperature by a pre-cooling device 30. Then, the temperature of the cold source medium is further lowered to a second extremely low temperature by a cryogenic device 20. The pre-cooling device 30 can be a refrigeration device 10 that can cool from room temperature to near the extremely low temperature and has a low cost. When cooling from room temperature to the first temperature, there is no need for multiple expensive cryogenic devices to be connected in parallel for cooling. This ensures the overall cooling efficiency and reduces the cost of cooling from room temperature to the first temperature, thereby reducing the overall cooling cost of the superconducting material.

[0022] The following detailed description is based on specific embodiments.

[0023] Please see Figure 1 As shown in the figure, a refrigeration device 10 provided by this utility model embodiment includes a cryogenic device 20, a precooling device 30, and a cold source pipeline 40; wherein, the cold source pipeline 40 passes through the precooling device 30 and the cryogenic device 20, the cold source pipeline 40 is used to carry the cold source medium, the precooling device 30 is used to cool the cold source medium to a first temperature, and the cryogenic device 20 is used to cool the cold source medium to a second temperature, the second temperature being lower than the first temperature.

[0024] Understandably, by employing a staged refrigeration mode that combines a pre-cooling stage with a cryogenic stage for the cold source medium, the problems of slow start-up and low cooling rate of traditional single cryogenic machines (such as GM refrigerators) when cooling from 300K to 80K are solved. This also avoids the excessively high cost associated with parallel operation of multiple cryogenic machines. The pre-cooling device 30 can be a low-cost unit (such as a liquid nitrogen direct cooling unit or a single-stage refrigerator), which can cool the cold source medium from 300K to 70K-90K (i.e., the pre-cooling stage). The initial cooling time in the pre-cooling stage will not be significantly prolonged, but the energy consumption and cost from room temperature to the first temperature stage can be reduced. The cryogenic device 20 can be a refrigeration unit highly efficient at low temperatures (such as a GM refrigerator), responsible for cooling from the first temperature to the second temperature (i.e., the cryogenic stage). This reduces the load on the cryogenic device 20, enabling it to maintain extremely low temperatures more efficiently and stably, extending the equipment's lifespan. The cold source pipeline 40 serves as a transmission channel for the cold source medium, circulating and transporting it to the material to be cooled. This ensures both the efficiency of overall cooling and the cost of cooling from room temperature to the first temperature, thus reducing the overall cooling cost of superconducting materials.

[0025] Specifically, the cryogenic device 20 can employ multiple refrigerators connected in parallel to improve refrigeration efficiency and meet the needs of different operating conditions. However, the number of units connected in parallel should be determined based on actual refrigeration requirements and economic considerations. Figure 2 Only two units are shown as examples; no specific quantity or connection method is specified.

[0026] In some embodiments, the first temperature is 70K to 90K, and the second temperature is less than 30K.

[0027] Specifically, the first temperature can be adjusted according to the cooling capacity of the precooling device 30 and the cryogenic device 20. The first temperature can be between 70K and 90K, for example, 70K, 71K, 72K, 73K, 74K, 75K, 76K, 77K, 78K, 79K, 80K, 81K, 82K, 83K, 84K, 85K, 86K, 87K, 88K, 89K, and 90K. The second temperature can be adjusted according to the cooling capacity of the cryogenic device 20 and the temperature required by the material to be cooled. The second temperature is less than 30K, for example, 30K, 29K, 28K, 27K, 28K, 25K, 24K, 23K, 22K, 21K, 20K, 19K, or even lower temperatures. These are just examples and not specific limitations.

[0028] Specifically, the cold source medium can be helium, which has excellent thermal conductivity and low-temperature characteristics, making it suitable for superconducting materials and other ultra-low temperature applications.

[0029] In some embodiments, please refer to the following for details. Figures 1 to 4The refrigeration equipment 10 further includes a first cold material interface 51 and a second cold material interface 52 for connecting the material to be cooled; the cold source pipeline 40 includes a first pipeline 41, a second pipeline 42, a third pipeline 43, and a fourth pipeline 44 connected in sequence; the first pipeline 41, the second pipeline 42, and the third pipeline 43 are connected in sequence, the first pipeline 41 passes through the cryogenic device 20 and is connected to the first cold material interface 51, the second pipeline 42 passes through the precooling device 30, and the third pipeline 43 is connected to the second cold material interface 52; wherein, one end of the fourth pipeline 44 is connected to the port of the first pipeline 41 away from the first cold material interface 51, and the other end of the fourth pipeline 44 is connected to the port of the third pipeline 43 away from the second cold material interface 52, and a first valve 45 is provided on the fourth pipeline 44; a second valve 46 is provided at the end of the second pipeline 42 near the first pipeline 41, and / or, a second valve 46 is provided at the end of the second pipeline 42 near the third pipeline 43.

[0030] As is easily understood, the first cold material interface 51 and the second cold material interface 52 can be connected to the material to be cooled, which is a superconducting material. One of the first cold material interface 51 and the second cold material interface 52 is the inlet, and the other is the outlet. The inlet or outlet can be adjusted according to the flow direction of the cold source medium and actual needs, without specific limitations. The first cold material interface 51, the second cold material interface 52, and the material to be cooled constitute the space to be cooled. The cold source pipeline 40 is connected to the space to be cooled to form a cooling loop. The cold source medium circulates in the cooling loop to cool the material to be cooled in the space to be cooled. A second valve 46 is provided at the end of the second pipeline 42 near the first pipeline 41, or the second valve 46 can be provided at the end of the second pipeline 42 near the third pipeline 43. The principle and effect of the two settings are similar. Figure 2 The following example illustrates the method of having a second valve 46 at one end of the second pipeline 42 near the third pipeline 43. The other method will not be repeated here.

[0031] During the precooling stage, the precooling device 30 is started, the first valve 45 is closed, and the second valve 46 is opened. The first cold material interface 51, the first pipeline 41, the second pipeline 42, the third pipeline 43, the second cold material interface 52, and the material to be cooled are connected to form a precooling circuit. The cold source medium circulates in the precooling circuit. During the precooling stage, the cold source medium is cooled by the precooling device 30, and the material to be cooled is cooled by the circulation of the cold source medium during the precooling stage. The cold source medium is cooled from room temperature to a first temperature, which can be any temperature from 70K to 90K, such as any temperature of 75K, 76K, 77K, 78K, or 79K.

[0032] The steps of starting the precooling device 30, closing the first valve 45, and opening the second valve 46 can be performed sequentially, or the steps of starting the precooling device 30, closing the first valve 45, and opening the second valve 46 can be performed simultaneously. Alternatively, the operation sequence can be adjusted according to actual needs, as long as the cold source medium can circulate smoothly in the precooling circuit during the precooling stage.

[0033] It is understandable that during the precooling stage, in addition to starting the precooling device 30, the cryogenic device 20 can also be started, so that both the precooling device 30 and the cryogenic device 20 are in working condition, thereby preparing for the deep cooling in the cryogenic stage and reducing the temperature fluctuation when switching from the precooling stage to the cryogenic stage; at the same time, during the precooling stage, the cryogenic device 20 and the precooling device 30 are used to cool the cold source medium together.

[0034] In the cryogenic stage, the precooling device 30 is shut down, the second valve 46 is closed, and the first valve 45 is opened. The third pipeline 43 connects the second cold material interface 52 and the fourth pipeline 44. The fourth pipeline 44 is also connected to the first pipeline 41. The first cold material interface 51, the first pipeline 41, the fourth pipeline 44, the third pipeline 43, the second cold material interface 52, and the material to be cooled are connected to form a cryogenic loop. The cold source medium circulates in the cryogenic loop. In the cryogenic stage, the cold source medium is cooled by the cryogenic device 20, and the material to be cooled is cooled by the cold source medium. The material undergoes a cryogenic cooling cycle, enabling flexible switching between the pre-cooling and cryogenic stages. The cryogenic device 20 is used to cool the cold source medium during the cryogenic stage. The cold source medium in the cold source pipeline 40 no longer flows through the pre-cooling device 30, reducing the path length of the cryogenic loop. The cold source medium in the cryogenic stage is directly circulated to the material to be cooled, which can improve the cooling efficiency of the material to be cooled, meet the requirements of superconducting materials for extremely low temperatures, such as below 30K, and ensure that the cooling process is continuous and efficient.

[0035] In some embodiments, please refer to the following for details. Figure 2 , Figure 5The first pipeline 41 is further equipped with a first temperature detector 61 near the first cold material inlet 51; and / or, the third pipeline 43 is further equipped with a second temperature detector 62 near the second cold material inlet 52. The first temperature detector 61 and the second temperature detector 62 can detect the temperature of the cold source medium near the inlet and outlet of the cold material inlet, thereby monitoring the temperature changes of the cold source medium in the pre-cooling and cryogenic stages in real time, ensuring the accuracy and stability of temperature control. Based on the data fed back by the temperature detectors, the first valve 45 and the second valve 46 can be adjusted; when the first temperature detector 61 or the second temperature detector 62 is higher than the first temperature, the first valve 45 is closed and the second valve 46 is opened to activate the pre-cooling circuit; when both the first temperature detector 61 and the second temperature detector 62 are lower than the first temperature, the second valve 46 is closed and the first valve 45 is opened to switch to the cryogenic circuit.

[0036] In some embodiments, the refrigeration device 10 further includes a controller, which is electrically connected to a first temperature detector 61, a second temperature detector 62, a first valve 45, and a second valve 46. Based on feedback data from the first temperature detector 61 and the second temperature detector 62, the controller can automatically adjust the opening and closing states of the first valve 45 and the second valve 46 to achieve dynamic switching between the pre-cooling circuit and the cryogenic circuit, thereby improving the response speed and control accuracy of the cold source medium at different cooling stages.

[0037] In some embodiments, please refer to the following for details. Figure 2 , Figure 3 A fan 71 is provided on the first pipeline 41. The fan 71 can accelerate the flow speed of the cold source medium in the first pipeline 41, enhance the heat exchange efficiency between the medium and the cryogenic device 20 and the precooling device 30, and enable the medium to reach the second temperature more quickly; at the same time, the fan 71 can accelerate the flow and circulation of the cold source medium in the corresponding cold material interface of the material to be cooled, and improve the cooling rate of the material to be cooled.

[0038] In some embodiments, please refer to the following for details. Figure 2 , Figure 4 The refrigeration equipment 10 is also equipped with a pressure sensor 72 located at at least one end of the fan 71. This sensor monitors the pressure changes in the first pipeline 41 in real time, indirectly reflecting the flow rate and state of the cold source medium. If the pressure is abnormal, it can provide timely warnings of pipeline blockage, fan 71 malfunction, or medium leakage, preventing a decrease in refrigeration efficiency or temperature fluctuations in the material to be cooled due to insufficient flow, thus ensuring the superconducting material operates in a stable low-temperature environment. In some embodiments, the refrigeration equipment 10 further includes a controller electrically connected to a pressure sensor 72. The controller can receive the pressure signal of the first pipeline 41 collected by the pressure sensor 72 and determine whether the pipeline operation is normal according to a preset pressure threshold range. When the pressure value is detected to exceed the set range, the controller can trigger an alarm mechanism to prompt maintenance personnel to check. At the same time, it can automatically adjust the speed of the fan 71 or shut down the system according to the fault level to prevent equipment damage or refrigeration interruption, and ensure the safety and reliability of the entire refrigeration process.

[0039] In some embodiments, please refer to the following for details. Figure 2 , Figure 3 The precooling device 30 further includes a first cavity 31 for containing the precooling medium, and at least a portion of the second pipeline 42 is disposed within the first cavity 31. A third temperature detector 63 and a fourth temperature detector 64 are respectively installed on the outer side wall of the first cavity 31 near the top and bottom ends. The first cavity 31 serves as a storage and heat exchange space for the cooling medium of the precooling device 30, and the cooling medium of the precooling device 30 can be liquid nitrogen. The second pipeline 42 is immersed in the cooling medium of the precooling device 30, achieving rapid cooling through heat exchange and improving precooling efficiency. The third temperature detector 63 and the fourth temperature detector 64 monitor the temperature of the precooling medium at different locations within the first cavity 31, reflecting the temperature uniformity and usage status of the medium. If an abnormally high temperature is detected, precooling medium can be replenished in a timely manner or the operating parameters of the precooling device 30 can be adjusted to ensure the cooling efficiency of the cold source medium in the second pipeline 42.

[0040] In some embodiments, please refer to the following for details. Figure 2 , Figure 3 The precooling device 30 also includes an insulated shell 32 disposed around the first cavity 31 to reduce heat exchange between the precooling medium and the external environment, maintain a stable internal temperature of the precooling device 30, and further improve the cooling efficiency and temperature control accuracy of the cold source medium during the precooling stage. The insulated shell 32 is made of high-efficiency heat insulation material, and a vacuum cavity can be formed between the insulated shell 32 and the first cavity 31 through a valve to further reduce heat transfer and improve the heat insulation effect.

[0041] In some embodiments, please refer to the following for details. Figure 2 , Figure 3 The refrigeration equipment 10 further includes a heat insulation device 80, which surrounds at least a portion of the first pipe 41 and at least a portion of the third pipe 43. The heat insulation device 80 is used to block external heat from interfering with the internal cold source medium of the pipe and to prevent cooling loss due to fluctuations in ambient temperature.

[0042] In some embodiments, please refer to the following for details. Figure 2 , Figure 3The insulation device 80 includes a second cavity 81, a fifth pipe 82 surrounding the outer wall of the second cavity 81, and a heat-insulating shell 83 surrounding the fifth pipe 82 and the second cavity 81. A pre-cooling medium is provided in the fifth pipe 82. At least a portion of the first pipe 41 and at least a portion of the third pipe 43 are located within the second cavity 81. The second cavity 81 surrounds at least a portion of the first pipe 41 and at least a portion of the third pipe 43, forming a closed space. This, together with the pre-cooling medium in the fifth pipe 82, forms a cold shield, absorbing heat radiation from the outside to the second cavity 81, reducing the temperature gradient between the heat-insulating shell 83 and the second cavity 81, and minimizing heat penetration. The temperature of the pre-cooling medium in the fifth pipe 82 is evenly distributed through the second cavity 81, further improving the insulation effect. Simultaneously, the pre-cooling medium in the fifth pipe 82 can provide secondary cooling for the cold source medium in the first pipe 41 and the third pipe 43, ensuring the temperature stability of the cold source medium during transportation.

[0043] Specifically, the precooling medium in the fifth pipe 82 can be liquid nitrogen, and the material of the second cavity 81 can be copper or other materials with good thermal conductivity to ensure efficient transfer of cooling. The material of the heat insulation shell 83 is aluminum foil composite material, polyurethane foam, or glass fiber, etc., to further enhance the heat insulation performance.

[0044] In some embodiments, please refer to the following for details. Figure 2 , Figure 4 The refrigeration device 10 also includes a first vacuum valve 84 disposed on the heat insulation shell 83 to discharge the air between the second cavity 81 and the heat insulation shell 83. By evacuating the air between the second cavity 81 and the heat insulation shell 83, the heat loss of the heat insulation device 80 is further reduced by utilizing the characteristics of a vacuum environment where there is almost no heat conduction and convection.

[0045] In some embodiments, please refer to the following for details. Figure 2 , Figure 5 The fifth pipe 82 is equipped with a fifth temperature detector 65. The fifth temperature detector 65 can monitor the temperature of the precooling medium in the fifth pipe 82 in real time, ensuring it remains stable at a preset temperature. If the temperature is too high, the precooling medium can be replaced or replenished in time to maintain the heat insulation effect of the cold shield and prevent external heat from penetrating to the first pipe 41 and the third pipe 43 through the insulation device 80. The number of fifth temperature detectors 65 can be set according to actual needs. Figure 5 Two fifth temperature detectors 65 are shown in the figure as an example, without specifying the exact number or connection method.

[0046] For details, please refer to [link / reference]. Figure 2 , Figure 4The refrigeration equipment 10 further includes a first medium valve 91 and a first exhaust valve. The first medium valve 91 and the first exhaust valve are connected to the fifth pipeline 82. The first medium valve 91 inputs precooling medium into the fifth pipeline 82, and the first exhaust valve is used to discharge gas in the fifth pipeline 82 to ensure that the precooling medium flows smoothly in the fifth pipeline 82.

[0047] For details, please refer to [link / reference]. Figure 2 , Figure 4 The refrigeration device 10 further includes a second medium valve 92 and a second exhaust valve. The second medium valve 92 and the second exhaust valve are connected to the first cavity 31 respectively. The second medium valve 92 inputs the precooling medium into the first cavity 31, and the second exhaust valve is used to discharge the gas in the first cavity 31 to ensure that the precooling medium is evenly distributed in the first cavity 31.

[0048] For details, please refer to [link / reference]. Figure 2 , Figure 4 The refrigeration device 10 also includes a second vacuum valve 94 disposed on the heat insulation shell 32 to discharge the air between the first cavity 31 and the heat insulation shell 32, thereby enhancing the heat insulation between the first cavity 31 and the outside.

[0049] For details, please refer to [link / reference]. Figure 2 , Figure 4 The refrigeration equipment 10 also includes a third medium valve 93, which is connected to the cold source pipeline 40. For example, the third medium valve 93 is connected to the second pipeline 42 and is used to input cold source medium into the cold source pipeline 40. At the same time, the cold source medium can be transported to the cold material interface by the fan 71.

[0050] Although the present invention has been disclosed above, its protection scope is not limited thereto. Those skilled in the art can make various changes and modifications without departing from the spirit and scope of the present invention, and all such changes and modifications will fall within the protection scope of the present invention.

Claims

1. A refrigeration device, characterized in that, It includes a cryogenic device (20), a precooling device (30), and a cold source pipeline (40). The cold source pipeline (40) passes through the precooling device (30) and the cryogenic device (20). The cold source pipeline (40) is used to carry the cold source medium. The precooling device (30) is used to cool the cold source medium to a first temperature. The cryogenic device (20) is used to cool the cold source medium to a second temperature, which is lower than the first temperature.

2. The refrigeration equipment according to claim 1, characterized in that, The refrigeration equipment (10) also includes a first cold material interface (51) and a second cold material interface (52) for connecting the material to be cooled. The cold source pipeline (40) includes a first pipeline (41), a second pipeline (42), a third pipeline (43), and a fourth pipeline (44) connected in sequence. The first pipeline (41), the second pipeline (42), and the third pipeline (43) are connected in sequence. The first pipeline (41) passes through the cryogenic device (20), and the end of the first pipeline (41) away from the second pipeline (42) is connected to the first cold material interface (51). The second pipeline (42) passes through the precooling device (30), and the third pipeline (43) is connected to the second cold material interface (52). Wherein, one end of the fourth pipe (44) is connected to the port of the first pipe (41) away from the first cold material interface (51), and the other end of the fourth pipe (44) is connected to the port of the third pipe (43) away from the second cold material interface (52). A first valve (45) is provided on the fourth pipe (44); a second valve (46) is provided at the end of the second pipe (42) near the first pipe (41), and / or, a second valve (46) is provided at the end of the second pipe (42) near the third pipe (43).

3. The refrigeration equipment according to claim 2, characterized in that, The first pipeline (41) is also provided with a first temperature detector (61) near the first cold material inlet (51); and / or, The third pipeline (43) is also equipped with a second temperature detector (62) near the second cold material interface (52).

4. The refrigeration equipment according to claim 2, characterized in that, A fan (71) is installed on the first pipeline (41).

5. The refrigeration equipment according to claim 4, characterized in that, The refrigeration equipment (10) is also provided with a pressure sensor (72) located at at least one end of the fan (71).

6. The refrigeration equipment according to claim 2, characterized in that, The precooling device (30) includes a first cavity (31) for containing a precooling medium, and at least a portion of the second pipeline (42) is disposed within the first cavity (31); The first cavity (31) has a third temperature detector (63) and a fourth temperature detector (64) on its outer side wall near the top and bottom ends, respectively.

7. The refrigeration equipment according to claim 2, characterized in that, The refrigeration equipment (10) further includes a heat insulation device (80) that surrounds at least a portion of the first conduit (41) and at least a portion of the third conduit (43).

8. The refrigeration equipment according to claim 7, characterized in that, The heat insulation device (80) includes a second cavity (81), a fifth pipe (82) surrounding the outer wall of the second cavity (81), and a heat insulation shell (83) surrounding the fifth pipe (82) and the second cavity (81), wherein the fifth pipe (82) is provided with a precooling medium; At least a portion of the first pipe (41) and at least a portion of the third pipe (43) are located within the second cavity (81).

9. The refrigeration equipment according to claim 8, characterized in that, The refrigeration device (10) also includes a first vacuum valve (84) disposed on the heat insulation shell (83) to discharge the air between the second cavity (81) and the heat insulation shell (83).

10. The refrigeration equipment according to claim 1, characterized in that, The first temperature is 70K to 90K, and the second temperature is less than 30K.

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