Temperature regulating device for a vacuum cryogenic environment

Abstract

The utility model discloses a kind of temperature regulating devices for vacuum cryogenic environment, including at least two layers of heat shield, the room temperature cover of the heat shield outside of the outermost layer of being set, the working temperature cover in the heat shield of being arranged in the innermost layer, the refrigerating machine for the heat exchange of each layer heat shield, gas inlet and outlet pipeline in turn from outside to inside into room temperature cover and each layer heat shield, gas circulation pipeline is arranged in the innermost layer heat shield and is penetrated into and out of working temperature cover, gas storage tank and drive pump are arranged in the outside of room temperature cover, the inner end of gas inlet and outlet pipeline is communicated on gas circulation pipeline;Temperature regulating device further includes internal circulating pump, internal circulating pump is used to drive gas circulation flow in gas circulation pipeline, gas circulation pipeline is respectively heat transfer connection with the innermost layer heat shield and working temperature cover.The utility model discloses a kind of temperature regulating devices for vacuum cryogenic environment, can avoid substantially increasing cold source load, realize the rapid temperature regulation of system.

Description

Technical Field

[0001] This utility model relates to a temperature regulation device for use in vacuum low-temperature environments. Background Technology

[0002] In a vacuum cryogenic environment, rapid cooling of the system is generally achieved through a fast-circuit device. Existing fast-circuit devices introduce a circulating working fluid (such as helium) into the system via an external pump set. The working fluid is first cooled by a cryogenic refrigerator, and then continuously circulates to remove heat from the system, thus cooling it. This structure has the following drawbacks: during the circulation process, the circulating working fluid leaves the cryogenic container and comes into contact with the external environment, introducing additional heat load, which significantly increases the cold source load and reduces the system's temperature regulation efficiency. Utility Model Content

[0003] The purpose of this invention is to provide a temperature regulation device for vacuum cryogenic environments, which can avoid significantly increasing the load on the cold source and achieve rapid temperature regulation of the system.

[0004] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0005] A temperature control device for a vacuum cryogenic environment includes at least two layers of heat shields arranged sequentially from the outside in, a room temperature shield disposed outside the outermost heat shield, a working temperature shield disposed in the innermost heat shield, a refrigerator for heat exchange for each layer of heat shields, gas inlet and outlet pipes sequentially inserted into the room temperature shield and each layer of heat shields from the outside in, a gas circulation pipe disposed in the innermost heat shield and inserted into and exiting the working temperature shield, a gas storage tank disposed outside the room temperature shield and connected to the gas inlet and outlet pipes, and a drive pump, wherein the inner end of the gas inlet and outlet pipes is connected to the gas circulation pipes.

[0006] The temperature regulating device also includes an internal circulation pump located in the innermost heat shield and connected to the gas circulation pipeline. The internal circulation pump is used to drive the gas to circulate in the gas circulation pipeline. The gas circulation pipeline is heat-transfer connected to the innermost heat shield and the working temperature shield, respectively.

[0007] Preferably, the internal circulation pump includes a cylinder with a hollow inner cavity, a pair of pistons disposed in the cylinder that can be close to or far from each other, a pair of elastic members disposed between the pistons and the corresponding side walls of the cylinder, an air inlet and an air outlet disposed on the cylinder and located between the pair of pistons, an air inlet check valve disposed in the air inlet, and an air outlet check valve disposed in the air outlet, wherein the air inlet and the air outlet are disposed opposite to each other.

[0008] More preferably, the pair of pistons are respectively sealed with the cylinder through a gap.

[0009] More preferably, the intake check valve and the exhaust check valve are both thin metal valve plates.

[0010] More preferably, the temperature regulating device further includes a drive motor for driving the internal circulation pump, the drive motor including a copper coil and a superconducting coil, and the drive motor having a first operating mode and a second operating mode:

[0011] When the temperature of the internal circulation pump is higher than the superconducting temperature, the drive motor enters the first working mode, and the drive motor drives the piston to move through the copper coil;

[0012] When the temperature of the internal circulation pump is lower than the superconducting temperature, the drive motor enters the second working mode, and the drive motor drives the piston to move through the superconducting coil.

[0013] Preferably, the heat shield includes a first shield body and a first cold plate disposed on the first shield body for heat transfer connection with the refrigerator or the gas circulation pipeline, respectively.

[0014] More preferably, the refrigerator includes a plurality of cold heads with successively decreasing temperatures, and the plurality of cold heads are connected to a plurality of first cold plates arranged sequentially from the outside to the inside for heat transfer.

[0015] Preferably, the working temperature shield includes a second shield body and a second cold plate disposed in the second shield body and heat-transfer connected to the gas circulation pipeline.

[0016] More preferably, there are multiple second cold plates arranged sequentially at intervals along the air intake direction of the gas circulation pipeline.

[0017] Preferably, vacuum is provided between the room temperature shield and the outermost heat shield, between adjacent heat shields, and between the innermost heat shield and the working temperature shield.

[0018] Due to the application of the above technical solution, this utility model has the following advantages compared with the prior art: This utility model, a temperature regulation device for vacuum cryogenic environments, uses multiple layers of heat shields to sequentially wrap the working temperature shield, and the gas circulation pipeline and internal circulation pump are integrally placed in the innermost heat shield. Driven by the internal circulation pump, the gas in the gas circulation pipeline can circulate and cool the working temperature shield. This structure can avoid introducing a large amount of external heat load into the gas circulation pipeline during gas circulation, avoid significantly increasing the cold source load, possess efficient temperature control response capability, and achieve rapid cooling of the system. Attached Figure Description

[0019] Appendix Figure 1 This is a schematic diagram of the temperature regulating device according to a specific embodiment of the present invention;

[0020] Appendix Figure 2 For the appendix Figure 1 Schematic diagram of the internal circulation pump Figure 1 ;

[0021] Appendix Figure 3 For the appendix Figure 1 Schematic diagram of the internal circulation pump Figure 2 .

[0022] The components include: 1. Heat shield; 11. First shield body; 12. First cold plate; 2. Room temperature shield; 3. Working temperature shield; 31. Second shield body; 32. Second cold plate; 4. Gas inlet and outlet pipelines; 5. Gas circulation pipelines; 6. Gas storage tank; 7. Drive pump; 8. Internal circulation pump; 81. Cylinder; 82. Piston; 83. Elastic element; 84. Air inlet; 85. Air outlet; 86. Inlet check valve; 87. Outlet check valve; 9. Cold head. Detailed Implementation

[0023] The technical solution of this utility model will be further described below with reference to specific embodiments and accompanying drawings.

[0024] In the following description, only certain exemplary embodiments are briefly described. As those skilled in the art will recognize, the described embodiments can be modified in various ways without departing from the spirit or scope of the present invention. Therefore, the drawings and description are considered to be exemplary in nature and not restrictive.

[0025] In the description of the embodiments of this utility model, it should be understood that the terms "length", "inner", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the embodiments of this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on the embodiments of this utility model.

[0026] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of embodiments of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0027] In this embodiment of the invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a communication connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this embodiment of the invention according to the specific circumstances.

[0028] In this embodiment of the invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0029] The following disclosure provides many different implementations or examples for different structures of the embodiments of the present invention. To simplify the disclosure of the embodiments of the present invention, specific examples of components and arrangements are described below. Of course, these are merely examples and are not intended to limit the embodiments of the present invention. Furthermore, reference numerals and / or reference letters may be repeated in different examples of the embodiments of the present invention; such repetition is for simplification and clarity and does not in itself indicate a relationship between the various implementations and / or arrangements discussed.

[0030] See Figure 1 As shown, this embodiment provides a temperature control device for a vacuum cryogenic environment, including at least two layers of heat shields 1 arranged sequentially from the outside in, a room temperature shield 2 placed outside the outermost heat shield 1, a working temperature shield 3 located in the innermost heat shield 1, a refrigerator (not shown) for heat exchange between the heat shields 1, gas inlet and outlet pipes 4 inserted sequentially from the outside in into the room temperature shield 2 and each heat shield 1, a gas circulation pipe 5 located in the innermost heat shield 1, a gas storage tank 6 located outside the room temperature shield 2 and connected to the gas inlet and outlet pipes 4, and a drive pump 7. The gas circulation pipe 5 passes through the working temperature shield 3, and the inner end of the gas inlet and outlet pipes 4 is connected to the gas circulation pipe 5 for supplying gas to the gas circulation pipe 5 or extracting gas from the gas circulation pipe 5.

[0031] In this embodiment, the refrigeration unit includes multiple cold heads 9 with sequentially decreasing temperatures, and each cold head 9 is connected to a plurality of first cold plates 12 arranged sequentially from the outside to the inside for heat transfer. This arrangement allows different low temperatures to be transferred to each layer of the heat shield 1, thereby improving the insulation effect.

[0032] In this embodiment, the heat shield 1 has two layers: the outer heat shield 1 is a 40K shield, and the inner heat shield 1 is a 4K shield. The room temperature shield 2 is a 300K shield, close to the outdoor standard temperature; the working temperature shield 3 is a 1K shield, which is the temperature required in this embodiment.

[0033] In this embodiment, there are two cold heads 9: one 40K cold head 9 is used to transfer heat and cool the outer heat shield 1, and the other 4K cold head 9 is used to transfer heat and cool the inner heat shield 1.

[0034] In this embodiment, vacuum enclosures are respectively set between the room temperature enclosure 2 and the outermost heat shield 1, between adjacent heat shields 1, and between the innermost heat shield 1 and the working temperature enclosure 3. This structure can avoid heat convection and reduce heat radiation, thereby improving the heat preservation effect.

[0035] The aforementioned temperature control device for a vacuum cryogenic environment also includes an inner circulation pump 8 located in the innermost heat shield 1 and connected to the gas circulation pipeline 5. The inner circulation pump 8 drives the gas to circulate in the gas circulation pipeline 5, which is connected to both the innermost heat shield 1 and the working temperature shield 3 for heat transfer. Since the refrigerator can exchange heat and cool each layer of heat shield 1, it can also cool the gas medium in the gas circulation pipeline 5, enabling the gas circulation pipeline 5 to cool the working temperature shield 3.

[0036] See Figure 1 As shown, the gas storage tank 6 and the drive pump 7 are respectively located outside the room temperature cover 2. When cooling is required, the drive pump 7 pumps the circulating working medium (helium in this embodiment) in the gas storage tank 6 into the gas circulation pipeline 5, and the circulating working medium is circulated by the internal circulation pump 8 to cool the innermost working temperature cover 3. When it is necessary to stop, the drive pump 7 can be used to pump the circulating working medium in the gas circulation pipeline 5 back into the gas storage tank 6.

[0037] See Figure 2As shown, the aforementioned internal circulation pump 8 includes a cylinder 81 with a hollow inner cavity, a pair of pistons 82 disposed in the cylinder 81 that can be close to or relatively far apart from each other, a pair of elastic members 83 respectively disposed between the corresponding side walls of the pistons 82 and the cylinder 81, an air inlet 84 and an air outlet 85 opened on the cylinder 81 and located between the pair of pistons 82, an air inlet check valve 86 disposed in the air inlet 84, and an air outlet check valve 87 disposed in the air outlet 85. The air inlet 84 and the air outlet 85 are disposed opposite to each other. The pair of elastic members 83 are used to be synchronously stretched when the pair of pistons 82 move towards each other, and also to be synchronously compressed when the pair of pistons 82 move away from each other.

[0038] In this embodiment, a pair of pistons 82 are respectively sealed with the cylinder 81. This structure avoids the problem of not being able to operate at low temperatures caused by oil seals or rubber material seals.

[0039] By setting an intake check valve 86 and an exhaust check valve 87, when a pair of pistons 82 approach each other and the air pressure in the cylinder 81 is greater than the critical value of the exhaust check valve 87, the circulating working fluid in the internal circulation pump 8 is output through the exhaust check valve 87; when a pair of pistons 82 move away from each other and the air pressure in the cylinder 81 is less than the critical value of the intake check valve 86, the circulating working fluid enters the internal circulation pump 8 through the intake check valve 86.

[0040] In this embodiment, the intake check valve 86 and the exhaust check valve 87 are thin metal valve plates to accommodate the high-frequency operation of the built-in internal circulation pump 8.

[0041] The aforementioned temperature regulation device for a vacuum cryogenic environment also includes a drive motor (not shown in the figure) for driving the internal circulation pump 8. The drive motor includes a copper coil and a superconducting coil, and has a first operating mode and a second operating mode.

[0042] When the temperature of the internal circulation pump 8 is higher than the superconducting temperature, the drive motor enters the first working mode and drives the piston 82 to move through the copper coil.

[0043] When the temperature of the internal circulation pump 8 is lower than the superconducting temperature, the drive motor enters the second working mode, and the drive motor drives the piston 82 to move through the superconducting coil.

[0044] This structure reduces the heat generated by the internal circulation pump 8, further ensuring rapid cooling of the system.

[0045] The aforementioned heat shield 1 includes a first shield body 11 and a first cold plate 12 disposed on the first shield body 11 for respectively abutting against the cold head 9 or the gas circulation pipe 5. In this embodiment, the outer first cold plate 12 is only used for heat transfer connection with the corresponding 40K cold head 9, while the inner first cold plate 12 is used for heat transfer connection with the gas circulation pipe 5 and the corresponding 4K cold head 9 respectively.

[0046] The aforementioned working temperature cover 3 includes a second cover body 31 and a second cold plate 32 disposed in the second cover body 31 and connected to the gas circulation pipeline 5 for heat transfer. There are multiple second cold plates 32 arranged sequentially at intervals along the air intake direction of the gas circulation pipeline 5.

[0047] In this embodiment, there are three second cold plates 32, which are arranged sequentially along the gas circulation pipeline 5 as an evaporation chamber cold plate of 0.8K, an intermediate cold plate of 0.1K, and a mixing chamber cold plate of 0.01K.

[0048] The above embodiments are only for illustrating the technical concept and features of this utility model, and are intended to enable those skilled in the art to understand the content of this utility model and implement it accordingly. They should not be construed as limiting the scope of protection of this utility model. All equivalent changes or modifications made in accordance with the spirit and essence of this utility model should be included within the scope of protection of this utility model.

Claims

1. A temperature control device for use in a vacuum cryogenic environment, characterized in that: It includes at least two layers of heat shields arranged sequentially from the outside to the inside, a room temperature shield placed outside the outermost heat shield, a working temperature shield placed inside the innermost heat shield, a refrigerator for heat exchange for each layer of heat shields, gas inlet and outlet pipes that pass through the room temperature shield and each layer of heat shield sequentially from the outside to the inside, a gas circulation pipe placed inside the innermost heat shield and passing through the working temperature shield, a gas storage tank and a drive pump placed outside the room temperature shield and connected to the gas inlet and outlet pipes, wherein the inner end of the gas inlet and outlet pipes is connected to the gas circulation pipe; The temperature regulating device also includes an internal circulation pump located in the innermost heat shield and connected to the gas circulation pipeline. The internal circulation pump is used to drive the gas to circulate in the gas circulation pipeline. The gas circulation pipeline is heat-transfer connected to the innermost heat shield and the working temperature shield, respectively.

2. The temperature regulating device for a vacuum cryogenic environment according to claim 1, characterized in that: The internal circulation pump includes a cylinder with a hollow inner cavity, a pair of pistons disposed in the cylinder that can be close to or far from each other, a pair of elastic members disposed between the pistons and the corresponding side walls of the cylinder, an air inlet and an air outlet disposed on the cylinder and located between the pair of pistons, an air inlet check valve disposed in the air inlet, and an air outlet check valve disposed in the air outlet, wherein the air inlet and the air outlet are arranged opposite to each other.

3. The temperature regulating device for a vacuum cryogenic environment according to claim 2, characterized in that: The pair of pistons are respectively sealed with the cylinder through a gap.

4. The temperature regulating device for a vacuum cryogenic environment according to claim 2, characterized in that: The inlet check valve and the outlet check valve are both thin metal valve plates.

5. The temperature regulating device for a vacuum cryogenic environment according to claim 2, characterized in that: The temperature regulating device further includes a drive motor for driving the internal circulation pump. The drive motor includes a copper coil and a superconducting coil, and has a first operating mode and a second operating mode. When the temperature of the internal circulation pump is higher than the superconducting temperature, the drive motor enters the first working mode, and the drive motor drives the piston to move through the copper coil; When the temperature of the internal circulation pump is lower than the superconducting temperature, the drive motor enters the second working mode, and the drive motor drives the piston to move through the superconducting coil.

6. The temperature regulating device for a vacuum cryogenic environment according to claim 1, characterized in that: The heat shield includes a first shield body and a first cold plate disposed on the first shield body for heat transfer connection with the refrigerator or the gas circulation pipeline, respectively.

7. The temperature regulating device for a vacuum cryogenic environment according to claim 6, characterized in that: The refrigerator includes multiple cold heads with successively decreasing temperatures, and each of the multiple cold heads is connected to a multiple first cold plate arranged sequentially from the outside to the inside for heat transfer.

8. The temperature regulating device for a vacuum cryogenic environment according to claim 1, characterized in that: The working temperature shield includes a second shield body and a second cold plate disposed in the second shield body and connected to the gas circulation pipeline for heat transfer.

9. The temperature regulating device for a vacuum cryogenic environment according to claim 8, characterized in that: The second cold plate consists of multiple pieces, which are arranged sequentially at intervals along the air intake direction of the gas circulation pipeline.

10. The temperature regulating device for a vacuum cryogenic environment according to claim 1, characterized in that: Vacuum enclosures are respectively set between the room temperature enclosure and the outermost heat shield, between adjacent heat shields, and between the innermost heat shield and the working temperature enclosure.

Images