Spindle-shaped low-temperature pre-cooling device and refrigerator

Abstract

The present application relates to the technical field of refrigeration equipment and discloses a spindle-shaped low-temperature pre-cooling device and a refrigerator, comprising: a drive assembly and a first spindle-shaped conductive member, the first spindle-shaped conductive member being connected to the drive assembly and moving in a preset direction by the drive assembly; a first cold source temperature zone member, a first experimental cold plate, and a second cold source temperature zone member being sequentially arranged side by side along the preset direction, the first cold source temperature zone member and the second cold source temperature zone member having different pre-cooling temperatures; the first spindle-shaped conductive member being able to move to an upper contact state and a lower contact state; when in the upper contact state, the first spindle-shaped conductive member is connected to the first cold source temperature zone member and the first experimental cold plate and conducts cold energy; when in the lower contact state, the first spindle-shaped conductive member is connected to the second cold source temperature zone member and the first experimental cold plate and conducts cold energy. The present application solves the problem in the prior art that the operation process of using multiple predetermined switches is cumbersome and reduces the efficiency of cooling and experiment.

Description

Technical Field

[0001] The present application relates to the field of refrigeration technology, and in particular to a spindle-shaped low-temperature pre-cooling device and a refrigerator. Background Art

[0002] The startup or use of cryogenic equipment and systems all begins at room temperature. This poses the challenge of cooling the temperature of cryogenic equipment from room temperature (300K) to below 1K, or even as low as a few milliK. This requires significant time and energy to achieve (sometimes cooling can take more than a week). To address this issue, a method similar to a circuit breaker is currently used. Initially, pre-cooling begins by placing a starting low-temperature cooling source in contact with all the cold plates or devices that require cooling. Once the temperatures of each cold plate have dropped to approximately the same level as the starting low-temperature cooling source, the cold plates are disconnected from the starting cooling source, allowing them to continue cooling. This pre-cooling process allows for rapid cooling of the cold plates or devices, saving both cooling time and energy.

[0003] During the aforementioned pre-cooling process of the cold plate or device, a pre-cooling switch is typically used to connect or disconnect the cold plate from the starting low-temperature cooling source. Pre-cooling switches typically operate in a single direction. For example, pushing the pre-cooling switch downward connects all cold plates requiring pre-cooling. Moving the pre-cooling switch upward a certain distance disconnects the cold plates, preventing pre-cooling. Pre-cooling switches come in various forms, with mechanical ones being the most common. However, conventional mechanical pre-cooling switches often require two or more starting cooling sources in typical low-temperature systems. For example, the cold head in a commonly used dry refrigeration system has two starting cooling source temperatures: 50K and 4K. This requires the installation of two or more pre-cooling switches, one of which controls the cold plate's contact with the starting cooling source at 50K, and another pre-cooling switch controls the cold plate's contact with the starting cooling source at 4K, completing the pre-cooling process. Switching between these pre-set switches requires reopening the vacuum chamber, which is not only cumbersome but also wastes time and energy, reducing the efficiency of the cooling process and the experiment. Summary of the Invention

[0004] In view of the above-mentioned deficiencies in the prior art, the purpose of this application is to provide a spindle-shaped low-temperature pre-cooling device and a refrigerator to solve the problem in the prior art that the operation process of using multiple predetermined switches is cumbersome and reduces the efficiency of cooling and experiments.

[0005] The technical solution of this application is as follows:

[0006] On the one hand, the present application provides a spindle-shaped low-temperature pre-cooling device, comprising: a driving assembly and a first spindle-shaped conductive member, wherein the first spindle-shaped conductive member is connected to the driving assembly and is driven by the driving assembly to move along a preset direction;

[0007] and a first cold source temperature zone component, a first experimental cold plate, and a second cold source temperature zone component sequentially arranged side by side along a preset direction, wherein the first cold source temperature zone component and the second cold source temperature zone component have different pre-cooling temperatures;

[0008] The first spindle-shaped conductive member has an upper contact state and a lower contact state by moving;

[0009] When in the upper contact state, the first spindle-shaped conductive member is connected to the first cold source temperature zone member and the first experimental cold plate, and performs cold conduction;

[0010] In the lower contact state, the first spindle-shaped conductive component is connected to the second cold source temperature zone component and the first experimental cold plate, and cold energy is conducted.

[0011] Optionally, the first spindle-shaped conductive member includes: a main conductive portion, the main conductive portion being connected to the first experimental cold plate and performing cold conduction;

[0012] An upper contact portion, which is fixedly arranged at one end of the main conductive portion and is tapered;

[0013] The lower contact portion is fixedly arranged at the other end of the main conductive portion and is tapered;

[0014] The first cold source temperature zone component has a first pair of interfaces, which are tapered; the second cold source temperature zone component has a second pair of interfaces, which are tapered;

[0015] The upper contact portion is embedded in the first docking port or the lower contact portion is embedded in the second docking port by moving the main body conducting portion.

[0016] Optionally, a heat conducting member is connected to the first experimental cold plate, one end of the heat conducting member abuts against the main conducting portion; the heat conducting member is a heat conducting copper rope.

[0017] Optionally, the first cold source temperature zone component includes: a first cold source temperature zone plate, the driving component passes through the first cold source temperature zone plate and is connected to the first spindle-shaped conductive component;

[0018] a first contact plate, the first contact plate being movably disposed on a side of the first cold source temperature zone plate facing the first spindle-shaped conductive member, and the first docking port being provided on a surface of the first contact plate facing the first spindle-shaped conductive member;

[0019] The upper heat conducting member is connected to the first cold source temperature zone plate and the first contact plate.

[0020] Optionally, a first buffer elastic member is provided between the first contact plate and the first cold source temperature zone plate.

[0021] Optionally, a sealing cover is provided on the first cold source temperature zone plate, and the driving component passes through the sealing cover;

[0022] The first contact plate is movably connected to the sealing cover.

[0023] Optionally, the second cold source temperature zone component includes: a second cold source temperature zone plate, the second cold source temperature zone plate being located on a side of the first spindle-shaped conductive component away from the first cold source temperature zone plate;

[0024] A second contact plate, the second contact plate being movably disposed on a side of the second cold source temperature zone plate facing the first spindle-shaped conductive member, and the second docking port being provided on a surface of the second contact plate facing the first spindle-shaped conductive member;

[0025] a lower heat conducting member connected to the second cold source temperature zone plate and the second contact plate;

[0026] The second buffer elastic member is connected between the second contact plate and the second cold source temperature zone plate.

[0027] Optionally, the driving assembly includes: a displacement driver, the displacement driver being arranged on a side of the first cold source temperature zone component away from the second cold source temperature zone component;

[0028] A displacement control rod, which is connected to the displacement driver and moves back and forth along a preset direction by the displacement driver;

[0029] The displacement control rod passes through the first cold source temperature zone component, and the first spindle-shaped conductive component is connected to the displacement control rod.

[0030] Optionally, the spindle-shaped low-temperature pre-cooling device further includes: a third contact plate, the third contact plate being movably arranged on a side of the second cold source temperature zone plate away from the first cold source temperature zone plate via a third buffer elastic member, the third contact plate being connected to the second cold source temperature zone plate via a third heat conducting member for cooling;

[0031] A second experimental cold plate, the second experimental cold plate is arranged on a side of the third contact plate away from the second cold source temperature zone plate;

[0032] A thermal contact funnel, the thermal contact funnel is located on a side of the second experimental cold plate away from the second cold source temperature zone plate;

[0033] The driving assembly further includes: a second spindle-shaped conductive member, the second spindle-shaped conductive member is connected to the first spindle-shaped conductive member through a through rod, and the second spindle-shaped conductive member is movably abutted against the second experimental cold plate;

[0034] The second spindle-shaped conductive member is driven by the driving assembly to abut against the inside of the thermal contact funnel;

[0035] The second cold source temperature zone component, the third contact disk, the third buffer elastic component, the second experimental cold plate and the second spindle-shaped conductive component form a temperature zone assembly. There are multiple temperature zone assemblies, and the multiple temperature zone assemblies are arranged in sequence along a preset direction. The thermal contact funnel is located on one side of the second spindle-shaped conductive component at the bottom layer.

[0036] On the other hand, the present application also proposes a refrigerator, which includes: a refrigerator main frame, and the spindle-shaped low-temperature pre-cooling device as described above, and the spindle-shaped low-temperature pre-cooling device is arranged on the refrigerator main frame.

[0037] Beneficial effect: Compared with the prior art, the present application proposes a spindle-shaped low-temperature pre-cooling device and a refrigerator. When the spindle-shaped low-temperature pre-cooling device is in operation, in the initial state, the first spindle-shaped conductive member is in a neutral position and is not in contact with any cold source temperature zone member. When driven by the driving component, the first spindle-shaped conductive member can move up and down, and form an upper contact state and a lower contact state, respectively. When the first spindle-shaped conductive member moves upward, the upper end of the first spindle-shaped conductive member is connected to the first cold source temperature zone member, and the first spindle-shaped conductive member is still connected to the first experimental cold plate during the movement. The cold energy is conducted through the first spindle-shaped conductive member, and the cold energy on the first cold source temperature zone member is conducted to the first experimental cold plate, which means that the temperature of the first experimental cold plate can be reduced to approximately the temperature of the first cold source temperature zone member. Similarly, when the first spindle-shaped conductive member moves downward from the neutral position, the lower end of the first spindle-shaped conductive member is connected to the second cold source temperature zone member, and the first spindle-shaped conductive member is still connected to the first experimental cold plate during the movement. The cold energy is conducted through the first spindle-shaped conductive member, and the cold energy on the second cold source temperature zone member is conducted to the first experimental cold plate. This means that the temperature of the first experimental cold plate can be reduced to approximately the temperature of the second cold source temperature zone member. Thus, a spindle-shaped low-temperature pre-cooling device is used to achieve the function of connecting and disconnecting the two starting temperature zones. The use of the spindle-shaped low-temperature pre-cooling device of the present application is more convenient and flexible to operate, greatly reducing the pre-cooling time and shortening the working time of the external power source; the multi-temperature zone pre-cooling of a pre-cooling switch does not require reopening the vacuum chamber during the process of multiple stage-by-stage pre-cooling, which speeds up the progress of the cooling experiment, saves time and energy, and has high economic benefits and use value. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] Figure 1 This is a schematic diagram of the structural principle of a spindle-shaped low-temperature pre-cooling device according to an embodiment of the present application;

[0039] Figure 2 This is a cross-sectional view of a spindle-shaped low-temperature pre-cooling device in an upper contact state according to an embodiment of the present application;

[0040] Figure 3This is a cross-sectional view of a spindle-shaped low-temperature pre-cooling device in a lower contact state according to an embodiment of the present application.

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[0042] This application provides a spindle-shaped low-temperature pre-cooling device and refrigerator. To make the purpose, technical solution, and effects of this application more clear and explicit, the application is optionally described in detail below with reference to the accompanying drawings and examples. It should be understood that the specific embodiments described herein are merely for the purpose of explaining this application and are not intended to limit this application.

[0043] Example 1

[0044] like Figure 1As shown, this embodiment provides a spindle-shaped low-temperature pre-cooling device for use in a refrigerator, enabling each experimental cold plate to be pre-cooled in at least two temperature zones. The spindle-shaped low-temperature pre-cooling device primarily comprises: a drive assembly 100 (the drive assembly may include a displacement driver 110 and a displacement control rod 120), a first spindle-shaped conductive member 200, a first cold source temperature zone member 300 (the first cold source temperature zone member may include a first cold source temperature zone plate 310, a first contact plate 320, an upper heat conductive member 321, and a first buffer elastic member 330), a first experimental cold plate 400, and a second cold source temperature zone member 500 (the second cold source temperature zone member may include a second cold source temperature zone plate 510, a second contact plate 520, a lower heat conductive member 521, and a second buffer elastic member 530). When the drive assembly 100 is activated, it generates power. The first spindle-shaped conductive member 200 is connected to the drive assembly 100 and is driven by the drive assembly 100 to move in a preset direction. For ease of structural description, the preset direction in this embodiment is vertical. However, if the refrigerator is a horizontal structure, the preset direction can also be horizontal. The first cold source temperature zone component 300, the first experimental cold plate 400, and the second cold source temperature zone component 500 are arranged side by side in the vertical direction. The first cold source temperature zone component 300 is above the first experimental cold plate 400, and the second cold source temperature zone component 500 is below the first experimental cold plate 400. Experimental samples can be placed on the first experimental cold plate 400 for low-temperature or ultra-low-temperature experiments. The first cold source temperature zone component 300 and the second cold source temperature zone component 500 have different pre-cooling temperatures. Specifically, the temperature of the first cold source temperature zone component 300 can be 50K, while the temperature of the second cold source temperature zone component 500 can be 4K. The first spindle-shaped conductive member 200 moves to different positions and has at least three states, namely: initial state (such as Figure 1 As shown), upper contact state (as shown Figure 2 as shown) and the lower contact state (as shown Figure 3 As shown). Figure 1 As shown, in the initial state, the first spindle-shaped conductive member 200 is located in the middle position, and the middle part of the first spindle-shaped conductive member 200 is connected to the first experimental cold plate 400 and conducts cold energy, while the upper and lower ends of the first spindle-shaped conductive member 200 are not in contact with the first cold source temperature zone member 300 and the second cold source temperature zone member 500. Figure 2 As shown, when the first spindle-shaped conductive member 200 moves upward, it forms an upper contact state. In the upper contact state, the first spindle-shaped conductive member 200 is connected to the first cold source temperature zone member 300 and the first experimental cold plate 400, and performs cold conduction. Figure 3 As shown, when the first spindle-shaped conductive member 200 moves downward, a lower contact state is formed; in the lower contact state, the first spindle-shaped conductive member 200 is connected to the second cold source temperature zone member 500 and the first experimental cold plate 400, and cold energy is transferred.

[0045] like Figure 1 、 Figure 2 、 Figure 3 As shown, in the embodiment of the present invention, when the spindle-shaped low-temperature pre-cooling device is in operation, in the initial state, the first spindle-shaped conductive member 200 is in a neutral position and does not contact any cold source temperature zone component. When driven by the drive assembly 100, the first spindle-shaped conductive member 200 can move upward and downward, respectively forming an upper contact state and a lower contact state. When the first spindle-shaped conductive member 200 moves upward, the upper end of the first spindle-shaped conductive member 200 connects with the first cold source temperature zone component 300. The first spindle-shaped conductive member 200 remains connected to the first experimental cold plate 400 during the movement. The first spindle-shaped conductive member 200 conducts cold energy, transferring the cold energy from the first cold source temperature zone component 300 to the first experimental cold plate 400. This means that the temperature of the first experimental cold plate 400 can be reduced to approximately the temperature of the first cold source temperature zone component 300. Similarly, when the first spindle-shaped conductive member 200 moves downward from its neutral position, the lower end of the first spindle-shaped conductive member 200 connects to the second cold source temperature zone member 500. While the first spindle-shaped conductive member 200 remains connected to the first experimental cold plate 400, cold energy is transferred from the second cold source temperature zone member 500 to the first experimental cold plate 400 through the first spindle-shaped conductive member 200. This allows the temperature of the first experimental cold plate 400 to be reduced to approximately the same level as that of the second cold source temperature zone member 500. Thus, the present spindle-shaped low-temperature pre-cooling device achieves the function of connecting and disconnecting two starting temperature zones, allowing the first experimental cold plate 400 to conduct experiments in two different temperature zones. The spindle-shaped low-temperature pre-cooling device of the present application is more convenient and flexible to operate, greatly reducing the pre-cooling time and shortening the working time of the external power source; the multi-temperature zone pre-cooling with a pre-cooling switch does not require reopening the vacuum chamber during the process of multiple stage-by-stage pre-cooling, which speeds up the cooling experiment progress, saves time and energy, and has high economic benefits and use value.

[0046] like Figure 1As shown, the first spindle-shaped conductive member 200 specifically includes a main conductive portion 210, an upper contact portion 220, and a lower contact portion 230. The main conductive portion 210, the upper contact portion 220, and the lower contact portion 230 are arranged in the vertical direction and integrally formed. The main conductive portion 210 is connected to the first experimental cold plate 400 for cooling. The upper contact portion 220 is fixedly mounted at the upper end of the main conductive portion 210 and has a tapered shape; the lower contact portion 230 is fixedly mounted at the lower end of the main conductive portion 210 and has a tapered shape, thereby forming a shape with tapered ends and a uniform thickness in the middle. It is easy to imagine that other shapes with a uniform thickness in the middle and tapered ends can also be used, such as triangular or arc-shaped ends. The drive assembly 100 passes through the first cold source temperature zone component 300 in the vertical direction and is connected to the upper contact portion 220. Driven by the drive assembly 100, the main conductive portion 210, the upper contact portion 220, and the lower contact portion 230 move up and down synchronously. The first cold source temperature zone component 300 has a first, tapered, downward-opening docking port. The second cold source temperature zone component 500 has a second, tapered, upward-opening docking port. The upper contact portion 220 is inserted into the first docking port, or the lower contact portion 230 is inserted into the second docking port, by moving the main conductive portion 210. The tapered first and second docking ports create a trumpet-shaped docking port that matches the upper and lower taper angles of the first spindle-shaped conductive component 200. This allows the upper and lower contact portions 220 and 230 to maintain close contact with their respective cold plates. The tapered contact pattern maximizes the contact area, resulting in high efficiency during the cooling process.

[0047] like Figure 1 As shown, a heat conducting member 410 is further connected to the first experimental cold plate 400, one end of which is connected to the first spindle-shaped conductive member 200. The heat conducting member 410 can be a heat conducting copper rope, such as a copper thermally conductive flexible rope. One end of the heat conducting copper rope is connected to the first experimental cold plate 400, and the other end is connected to the main conductive portion 210. Because the heat conducting copper rope is deformable, it does not affect the movement of the first spindle-shaped conductive member 200. The heat conducting copper rope has excellent thermal conductivity and is convenient for use in low-temperature environments.

[0048] It is easy to imagine that the heat conduction member 410 can also be a heat conduction copper sheet. For example, one end of the heat conduction copper sheet is fixed to the first experimental cold plate 400, and the other end elastically rests on the main conduction part 210. Through elasticity, it can also contact the surface of the main conduction part 210 to conduct cold, and will not affect the movement process of the main conduction part 210.

[0049] like Figure 1As shown, the first cold source temperature zone component 300 can include various structures. For example, the first cold source temperature zone component 300 can include only the first cold source temperature zone plate 310, with the first docking port being provided on the first cold source temperature zone component 300. The first cold source temperature zone component 300 of this embodiment specifically includes: the first cold source temperature zone plate 310, a first contact plate 320, and an upper heat conducting member 321. The driving assembly 100 passes through the first cold source temperature zone plate 310 and is connected to the first spindle-shaped conducting member 200. The first contact plate 320 is movably disposed on the underside of the first cold source temperature zone plate 310. The first docking port is provided on the lower surface of the first contact plate 320. The driving assembly 100 extends through the first docking port and is connected to the upper contact portion 220 below. The upper heat conducting member 321 uses a heat conducting copper rope to connect the first cold source temperature zone plate 310 and the first contact plate 320. The first contact disk 320 is movably arranged, and may be a gravity return or elastic return structure. When docking with the first spindle-shaped conductive member 200, the upper contact portion 220 and the first contact disk 320 engaged therewith can continue to move a little, so that the contact between the upper contact portion 220 and the first docking interface can be closer, thereby improving the cooling performance and efficiency. In addition, the size of each subsequent spindle-shaped conductive member is tolerant, and even if there is a slight deviation in size, it can be firmly engaged with the corresponding contact disks under the drive of the driving component 100.

[0050] like Figure 1 As shown, a first elastic buffer member 330 is further provided between the first contact plate 320 and the first cold source temperature zone plate 310. The first elastic buffer member 330 can be a spring. When a spring is used, after the first cold source temperature zone member 300 contacts the first spindle-shaped conductive member 200, the first contact plate 320 and the first cold source temperature zone plate 310 are connected by a strong spring and a copper heat conduction cord. Consequently, the first elastic buffer member 330 pushes the first contact plate 320 against the first spindle-shaped conductive member 200, achieving a secure connection. Simultaneously, the copper heat conduction cord also allows the first contact plate 320 and the first cold source temperature zone plate 310 to establish a thermal connection. Not only does this large contact surface area, but the high positive pressure generated by the elastic action also results in excellent heat conduction.

[0051] like Figure 1 As shown, a sealing cover 311 is further provided on the first cold source temperature zone plate 310, the drive assembly 100 passes through the sealing cover 311, and the first contact plate 320 is movably connected to the sealing cover 311. The use of the sealing cover 311 structure can facilitate the installation of the drive assembly 100 and the first spindle-shaped conductive member 200.

[0052] like Figure 1As shown, the second cold source temperature zone component 500 further includes: a second cold source temperature zone plate 510, a second contact plate 520, a lower heat conduction member 521, and a second buffer elastic member 530. The second cold source temperature zone plate 510 is located below the first spindle-shaped conductive member 200. The second contact plate 520 is movably disposed on the upper side of the second cold source temperature zone plate 510 by the action of the second buffer elastic member 530. The second docking port is provided on the upper surface of the second contact plate 520. The lower heat conduction member 521 uses a heat conduction copper rope and connects the second cold source temperature zone plate 510 and the second contact plate 520. The second buffer elastic member 530 is connected between the second contact plate 520 and the second cold source temperature zone plate 510. When the first spindle-shaped conductive member 200 is pressed downward and docks with the second contact plate 520, the thrust of the second elastic buffer member 530 pushes the second contact plate 520 upward, thereby increasing the contact surface area between the second docking port and the lower contact portion 230 of the first spindle-shaped conductive member 200. Furthermore, the elastic action generates a high positive pressure, which improves heat conduction. Furthermore, after the first spindle-shaped conductive member 200 moves away, the thrust of the second elastic buffer member 530 returns the second contact plate 520 to its original position, achieving a return function.

[0053] like Figure 1 、 Figure 2 、 Figure 3 As shown, the drive assembly 100 in this embodiment specifically includes a displacement driver 110 and a displacement control rod 120. The displacement driver 110 is disposed above the first cold source temperature zone component 300 and may be an electric push cylinder. The displacement control rod 120 is connected to the displacement driver 110 and is driven by the displacement driver 110 to move back and forth in the vertical direction. The displacement control rod 120 extends through the first cold source temperature zone component 300, and the first spindle-shaped conductive member 200 may be screwed to the displacement control rod 120. The drive assembly 100 enables automatic control, enabling automated raising and lowering of the first spindle-shaped conductive member 200.

[0054] like Figure 1 、 Figure 2 、 Figure 3As shown, this embodiment further enables pre-cooling by contacting multiple cold plates. Taking two cold plates as an example, the spindle-shaped low-temperature pre-cooling device further includes a third contact plate 540, a second experimental cold plate 600, and a thermal contact funnel 800. The third contact plate 540 is movably disposed on the side of the second cold source temperature zone plate 510 facing away from the first cold source temperature zone plate 310 via a third buffer elastic member 550. The third contact plate 540 and the second cold source temperature zone plate 510 are connected for cooling via a third heat conducting member 541, which utilizes a heat conducting copper rope. The second experimental cold plate 600 is disposed below the third contact plate 540. The thermal contact funnel 800 is located below the second experimental cold plate 600. The drive assembly 100 further includes a second spindle-shaped conductive member 700, which is connected to the first spindle-shaped conductive member 200 via a through-rod 121. The second spindle-shaped conductive member 700 is connected to the second experimental cold plate 600 via a thermally conductive copper rope, thereby enabling cold transfer between the second spindle-shaped conductive member 700 and the second experimental cold plate 600. Driven by the drive assembly 100, the second spindle-shaped conductive member 700 can assume two states: abutting against the third contact disk 540 or abutting against the thermal contact funnel 800. The driving assembly 100 drives the first spindle-shaped conductive member 200 and the second spindle-shaped conductive member 700 to move upward or downward synchronously. When moving upward, the first spindle-shaped conductive member 200 contacts the first contact disk 320 and transfers cold energy to the first experimental cold plate 400, thereby pre-cooling the first experimental cold plate 400. Simultaneously, the second spindle-shaped conductive member 700 contacts the third contact disk 540 and transfers cold energy from the second cold source temperature zone plate 510 to the second experimental cold plate 600, thereby pre-cooling the second experimental cold plate 600. This achieves synchronous pre-cooling of the first experimental cold plate 400 and the second experimental cold plate 600. When moving downward, the first spindle-shaped conductive member 200 contacts the second contact disk 520 and transfers cold energy to the first experimental cold plate 400, thereby further pre-cooling the first experimental cold plate 400. Simultaneously, the second spindle-shaped conductive member 700 contacts the thermal contact funnel 800, thereby maintaining the original pre-cooling temperature of the second experimental cold plate 600. By adopting this structural mode, multi-layer cold plates can be pre-cooled synchronously, thereby improving the experimental efficiency.

[0055] like Figure 1 、 Figure 2 、 Figure 3As shown, further, based on the structure of pre-cooling two layers of cold plates, in order to realize the pre-cooling process of more layers of cold plates, in this embodiment, the second cold source temperature zone component 500, the third contact disk 540, the third buffer elastic component 550, the second experimental cold plate 600 and the second spindle-shaped conductive component 700 form a temperature zone assembly, and a plurality of temperature zone assemblies are provided, and the plurality of temperature zone assemblies are arranged in sequence along a preset direction. Specifically, a second cold source temperature zone component 500, a third contact plate 540, and a third buffer elastic component 550 are disposed below the existing second experimental cold plate 600. A second experimental cold plate 600 is disposed below the second cold source temperature zone component 500. A second spindle-shaped conductive component 700 is connected to the second spindle-shaped conductive component 700 below the existing second spindle-shaped conductive component 700 via a through-rod 121. The second spindle-shaped conductive component 700 and the second experimental cold plate 600 are connected to each other via a third heat conductive component 541. This constitutes a temperature zone assembly configuration for the next layer. By sequentially disposing multiple temperature zone assemblies in a downward direction, multiple layers of cold plate pre-cooling can be achieved, and simultaneous pre-cooling of multiple temperature zone assemblies can be achieved with a single drive of the drive assembly 100. When multiple temperature zone assemblies are provided, the thermal contact funnel 800 is located below the second spindle-shaped conductive component 700 of the lowest layer.

[0056] Therefore, when the pre-cooling switch formed by the present spindle-shaped low-temperature pre-cooling device simultaneously contacts multiple cold plates, not only does the first spindle-shaped conductive element 200 effectively contact and conduct heat between the first cold source temperature zone element 300, but when it subsequently contacts other temperature zone components, to avoid rigid contact with the cold plate of the topmost first cold source temperature zone element 300, thereby limiting the contact of the cold plates in the lower temperature zone components, the present invention employs unique multi-stage buffer springs and copper soft conductive ropes in each cold plate structure, effectively resolving the aforementioned problem. By employing a spring-loaded contact plate, once the first cold-source temperature zone plate 310 contacts the first spindle-shaped conductive element 200, the first contact plate 320 is connected to the first cold-source temperature zone plate 310 by a strong spring and a copper heat-conducting cord. While the first spindle-shaped conductive element 200 is already firmly in contact with the first contact plate 320, the copper heat-conducting cord also maintains thermal connection between the first cold-source temperature zone plate 310 and the first spindle-shaped conductive element 200. However, the presence of the buffer spring allows the first spindle-shaped conductive element 200 and the first contact plate 320 to continue to move slightly, forcing the second spindle-shaped conductive element 700 and the third contact plate 540 in each temperature zone assembly below the pre-cooling switch to securely engage, and so on. This allows for synchronous control of multiple spindle-shaped conductive elements, thereby pre-cooling the first experimental cold plate 400 and the second experimental cold plate 600 in the multiple temperature zone assemblies.

[0057] Example 2

[0058] This embodiment provides a refrigerator, which includes: a refrigerator main frame, and the spindle-shaped low-temperature pre-cooling device as described above, and the spindle-shaped low-temperature pre-cooling device is arranged on the refrigerator main frame.

[0059] In summary, the spindle-shaped low-temperature pre-cooling device and refrigerator proposed in this application utilize the thin ends and thick middle shape of the spindle-shaped conductive element to design a pre-cooling switch, breaking the pre-cooling mode of only one-way on or off. When the pre-cooling switch is in the middle (neutral) position, pre-cooling is disconnected, while when it is moved upward and contacts the first cold source temperature zone element (50K starting temperature source), it enters the 50K starting pre-cooling working state. Similarly, when it moves straight down from the middle and contacts the second cold source temperature zone element (4K starting temperature source), it becomes a 4K pre-cooling process. The spindle-shaped low-temperature pre-cooling device of this application is more convenient and flexible to operate, greatly reducing the pre-cooling time and shortening the operating time of the external power source. The multi-temperature zone pre-cooling with a single pre-cooling switch does not require reopening the vacuum chamber during the step-by-step pre-cooling process, which speeds up the cooling experiment progress, saves time and energy, and has high economic benefits and practical value.

[0060] It should be understood that the application of this application is not limited to the above examples. For ordinary technicians in this field, they can make improvements or changes based on the above description. All these improvements and changes should fall within the scope of protection of the claims attached to this application.

Claims

1. A spindle-shaped low-temperature pre-cooling device, characterized in that: include: a driving assembly and a first spindle-shaped conductive member, wherein the first spindle-shaped conductive member is connected to the driving assembly and is driven by the driving assembly to move along a preset direction; and a first cold source temperature zone component, a first experimental cold plate, and a second cold source temperature zone component sequentially arranged side by side along the preset direction, wherein the first cold source temperature zone component and the second cold source temperature zone component have different pre-cooling temperatures; The first spindle-shaped conductive member has an upper contact state and a lower contact state by moving; When in the upper contact state, the first spindle-shaped conductive member is connected to the first cold source temperature zone member and the first experimental cold plate, and performs cold energy conduction; In the lower contact state, the first spindle-shaped conductive member is connected to the second cold source temperature zone member and the first experimental cold plate, and performs cold energy conduction; The first spindle-shaped conductive member includes: a main conductive portion, the main conductive portion being connected to the first experimental cold plate and performing cold conduction; an upper contact portion, the upper contact portion being fixedly disposed at one end of the main conductive portion and being tapered; a lower contact portion, the lower contact portion being fixedly disposed at the other end of the main conductive portion and being tapered; The first cold source temperature zone component has a first pair of interfaces, the first pair of interfaces is tapered, and the second cold source temperature zone component has a second pair of interfaces, the second pair of interfaces is tapered; The upper contact portion is embedded in the first docking port or the lower contact portion is embedded in the second docking port by moving the main conductive portion.

2. The spindle-shaped low-temperature pre-cooling device according to claim 1, characterized in that: The first experimental cold plate is connected to a heat conducting member, one end of which is connected to the main conducting portion; The heat conducting member is a heat conducting copper rope.

3. The spindle-shaped low-temperature pre-cooling device according to any one of claims 1-2, characterized in that: The first cold source temperature zone component includes: a first cold source temperature zone plate, the driving component passes through the first cold source temperature zone plate and is connected to the first spindle-shaped conductive component; a first contact plate, the first contact plate being movably disposed on a side of the first cold source temperature zone plate facing the first spindle-shaped conductive member, the first docking port being provided on a surface of the first contact plate facing the first spindle-shaped conductive member; An upper heat conducting member is connected to the first cold source temperature zone plate and the first contact plate.

4. The spindle-shaped low-temperature pre-cooling device according to claim 3, characterized in that: A first buffer elastic member is provided between the first contact plate and the first cold source temperature zone plate.

5. The spindle-shaped low-temperature pre-cooling device according to claim 3, characterized in that: The first cold source temperature zone plate is provided with a sealing cover, and the driving component passes through the sealing cover; The first contact plate is movably connected to the sealing cover.

6. The spindle-shaped low-temperature pre-cooling device according to claim 4, characterized in that: The second cold source temperature zone component includes: a second cold source temperature zone plate, the second cold source temperature zone plate being located on a side of the first spindle-shaped conductive component away from the first cold source temperature zone plate; a second contact plate, the second contact plate being movably disposed on a side of the second cold source temperature zone plate facing the first spindle-shaped conductive member, the second docking port being provided on a surface of the second contact plate facing the first spindle-shaped conductive member; a lower heat conducting member, the lower heat conducting member connecting the second cold source temperature zone plate and the second contact plate; A second elastic buffer member is connected between the second contact plate and the second cold source temperature zone plate.

7. The spindle-shaped low-temperature pre-cooling device according to claim 6, characterized in that: The driving assembly includes: a displacement driver, the displacement driver being arranged on a side of the first cold source temperature zone component away from the second cold source temperature zone component; a displacement control rod, the displacement control rod being connected to the displacement driver and being driven by the displacement driver to move back and forth along a preset direction; The displacement control rod passes through the first cold source temperature zone component, and the first spindle-shaped conductive component is connected to the displacement control rod.

8. The spindle-shaped low-temperature pre-cooling device according to claim 7, characterized in that: The spindle-shaped low-temperature pre-cooling device further includes: a third contact plate, the third contact plate being movably arranged on a side of the second cold source temperature zone plate away from the first cold source temperature zone plate via a third buffer elastic member, the third contact plate being connected to the second cold source temperature zone plate via a third heat conducting member for cooling; a second experimental cold plate, the second experimental cold plate being arranged on a side of the third contact plate away from the second cold source temperature zone plate; a thermal contact funnel, the thermal contact funnel being located on a side of the second experimental cold plate away from the second cold source temperature zone plate; The driving assembly further includes: a second spindle-shaped conductive member, the second spindle-shaped conductive member being connected to the first spindle-shaped conductive member via a through rod, and the second spindle-shaped conductive member being connected to the second experimental cold plate; The second spindle-shaped conductive member is driven by the driving assembly to connect to the third contact plate or abut against the thermal contact funnel; The second cold source temperature zone component, the third contact disk, the third buffer elastic component, the second experimental cold plate and the second spindle-shaped conductive component form a temperature zone assembly. There are multiple temperature zone assemblies, and the multiple temperature zone assemblies are arranged in sequence along the preset direction. The thermal contact funnel is located on one side of the second spindle-shaped conductive component at the bottom layer.

9. A refrigerator, characterized in that: include: A refrigerator main frame, and a spindle-shaped low-temperature pre-cooling device according to any one of claims 1 to 8, wherein the spindle-shaped low-temperature pre-cooling device is arranged on the refrigerator main frame.

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