Vacuum low-temperature surface source black body
By setting spaced refrigeration plates and radiation plates in the vacuum low-temperature surface source bold, and using structural optimizations such as thermal radiation and fixtures, the temperature uneven problem caused by liquid nitrogen refrigeration plates is solved, achieving a more uniform temperature distribution and higher working accuracy.
Patent Information
- Application Number
- CN202311823068.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2023-12-27
- Publication Date
- 2025-06-27
AI Technical Summary
When the existing vacuum low-temperature surface source bold is refrigerated with liquid nitrogen, the radiating surface refrigeration temperature is prone to uneven, mainly due to temperature differences and processing flatness problems caused by the internal design of the liquid nitrogen refrigeration plate.
By setting a space between the refrigeration plate and the radiation plate in the vacuum low-temperature surface source bold, a refrigeration liquid chamber is set inside the refrigeration plate, heat exchange is used to use heat radiation, and the structure is further optimized through the fixture and the insulation surrounding layer to ensure uniform temperature distribution.
The uniformity of the temperature distribution of the radiation plate is achieved, the working accuracy of the vacuum low-temperature surface source bold body is improved, and the problem of uneven heat distribution is avoided.
Smart Images
Figure CN120213235A_ABST
Abstract
Description
Technical Field
[0001] The invention relates to the technical field of surface source black bodies, and in particular to a vacuum low-temperature surface source black body. Background Art
[0002] Using liquid nitrogen for cooling is one of the common methods for cooling vacuum low-temperature surface source black bodies. In the prior art, when a liquid nitrogen cooling plate is used to cool a vacuum low-temperature black body by heat conduction, the cooling temperature of the black body radiation surface is prone to be uneven. There are mainly two problems: the liquid nitrogen cooling plate is internally designed as a liquid nitrogen flow channel. There are temperature differences between the flow channel and the flow wall and between the flow channels at different positions, resulting in inconsistent surface temperature of the liquid nitrogen cooling plate; the flatness problem of the liquid nitrogen cooling plate processing results in inconsistent contact between different parts of the liquid nitrogen cooling plate and the black body radiation plate, resulting in deviations in thermal resistance and differences in heat conduction, resulting in uneven cooling temperature of the black body radiation surface. Summary of the invention
[0003] Based on the above, the purpose of the present invention is to provide a vacuum low-temperature surface source blackbody with relatively uniform temperature distribution and high working accuracy.
[0004] To achieve the above object, the present invention adopts the following technical solutions:
[0005] A vacuum low-temperature surface source blackbody, comprising:
[0006] It comprises a radiation plate and a refrigeration plate. The refrigeration plate is spaced apart from the radiation plate. A refrigeration liquid cavity is arranged inside the refrigeration plate. The refrigeration liquid cavity is used for circulating refrigeration liquid.
[0007] As a preferred solution of the vacuum low-temperature surface source black body, it also includes a fixing member, and the fixing member is used to connect the refrigeration plate and the radiation plate so that the refrigeration plate and the radiation plate are fixed at a distance.
[0008] As a preferred solution for a vacuum low-temperature surface source black body, a plurality of the fixing members are provided, and the plurality of the fixing members are connected between the refrigeration plate and the radiation plate at intervals along the circumference of the refrigeration plate.
[0009] As a preferred solution for a vacuum low-temperature surface source black body, the fixing part includes a screw and a nut, a first connecting hole is opened on the refrigeration plate, a second connecting hole is opened on the radiation plate, the screw passes through the first connecting hole and the second connecting hole, and is threadedly connected to the nut.
[0010] As a preferred solution for a vacuum low-temperature surface source blackbody, the fixing member further comprises a heat-insulating sleeve, the heat-insulating sleeve is passed through the first connecting hole and the second connecting hole, and the screws are sleeved in the heat-insulating sleeve at intervals.
[0011] As a preferred solution of a vacuum low-temperature surface source blackbody, it also includes:
[0012] A heat preservation layer surrounds the outer periphery of the refrigerating plate and the radiation plate, and a closed cavity is formed among the refrigerating plate, the radiation plate and the heat preservation layer.
[0013] As a preferred scheme of a vacuum low-temperature surface source black body, one surface of the refrigerating plate is flat and faces the radiation plate.
[0014] As a preferred scheme of a vacuum low-temperature surface source black body, a black paint coating is arranged on the surface of the refrigerating plate facing the radiation plate.
[0015] As a preferred scheme of a vacuum low-temperature surface source black body, the roughness of the surface of the refrigerating plate facing the radiation plate is greater than that of the surface facing away from the radiation plate.
[0016] As a preferred scheme of a vacuum low-temperature surface source black body, the distance between the refrigerating plate and the radiation plate is 9 mm - 11 mm.
[0017] The beneficial effects of the present invention are as follows:
[0018] The present invention provides a vacuum low-temperature surface source black body, which includes a radiation plate and a refrigerating plate. By arranging the refrigerating plate and the radiation plate at intervals, that is, the refrigerating plate and the radiation plate do not directly contact, the refrigerating plate exchanges heat with the radiation plate in a heat radiation manner, avoiding the uneven heat distribution caused by heat conduction and heat convection between the refrigerating plate and the radiation plate, making the temperature distribution of the radiation plate relatively uniform, and thus ensuring the working accuracy of the vacuum low-temperature surface source black body. Description of the Drawings
[0019] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following will briefly introduce the drawings required for the description of the embodiments of the present invention. Obviously, the following drawings are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained according to the content of the embodiments of the present invention and these drawings.
[0020] Figure 1 It is a side sectional view of the vacuum low-temperature surface source black body provided by the embodiment of the present invention Figure 1 (The fixing parts are not shown);
[0021] Figure 2 It is the front view of the vacuum low-temperature surface source black body provided by the embodiment of the present invention (the fixing parts are not shown);
[0022] Figure 3 It is the rear view of the vacuum low-temperature surface source black body provided by the embodiment of the present invention (the fixing parts are not shown);
[0023] Figure 4It is a side view of the vacuum low-temperature surface source blackbody provided by the embodiment of the present invention (the thermal insulation layer is not shown);
[0024] Figure 5 It is a side sectional view of the vacuum low-temperature surface source blackbody provided by the embodiment of the present invention Figure 2 (the thermal insulation layer is not shown).
[0025] In the figure:
[0026] 1. Radiation plate; 2. Refrigeration plate; 3. Fixing member; 31. Screw; 32. Nut; 33. Heat insulation sleeve; 4. Thermal insulation layer. Specific embodiments
[0027] The present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It can be understood that the specific embodiments described herein are only used to explain the present invention, rather than limiting the present invention. In addition, it should be noted that, for the sake of convenience of description, only the parts related to the present invention are shown in the drawings, rather than all the structures.
[0028] In the description of the present invention, unless otherwise clearly defined and limited, the terms "connected", "connected", and "fixed" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated; it can be a mechanical connection or an electrical connection; it can be directly connected, or indirectly connected through an intermediate medium, and it can be the internal communication of two components or the interaction relationship between two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations.
[0029] In the present invention, unless otherwise clearly defined and limited, the first feature being "above" or "below" the second feature may include the direct contact between the first and second features, or may include the situation where the first and second features are not in direct contact but in contact through other features between them. Moreover, the first feature being "above", "above", and "on" the second feature includes that the first feature is directly above and obliquely above the second feature, or merely indicates that the first feature has a higher horizontal height than the second feature. The first feature being "below", "below", and "under" the second feature includes that the first feature is directly below and obliquely below the second feature, or merely indicates that the first feature has a lower horizontal height than the second feature.
[0030] In the description of the present embodiment, the terms "upper", "lower", "left", "right" and other directions or positional relationships are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of description and simplification of operation, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation of the present invention. In the description of the present invention, unless otherwise specified, the meaning of "plurality" is two or more. In addition, the terms "first" and "second" are only used to distinguish in the description and have no special meaning.
[0031] like Figures 1 to 5 As shown, this embodiment provides a vacuum low-temperature surface source black body, which includes a radiation plate 1 and a refrigeration plate 2. The refrigeration plate 2 is spaced apart from the radiation plate 1, and a refrigeration liquid cavity is provided inside the refrigeration plate 2, and the refrigeration liquid cavity is used to circulate the refrigeration liquid. The refrigeration liquid can be, but is not limited to, liquid nitrogen, which is input into the refrigeration liquid cavity, and heat is exchanged with the radiation plate 1 by means of thermal radiation. The refrigeration plate 2 is spaced apart from the radiation plate 1, that is, the refrigeration plate 2 is not in direct contact with the radiation plate 1, and the refrigeration plate 2 exchanges heat with the radiation plate 1 by means of thermal radiation, thereby avoiding uneven heat distribution caused by heat conduction and heat convection between the refrigeration plate 2 and the radiation plate 1, so that the temperature distribution of the radiation plate 1 is relatively uniform, thereby ensuring the working accuracy of the vacuum low-temperature surface source black body.
[0032] Exemplarily, a plurality of flow channels or a single serpentine flow channel are distributed in the refrigeration plate 2 to facilitate the uniform circulation of the refrigerant, thereby making the refrigeration capacity relatively stable.
[0033] Preferably, one side of the refrigeration plate 2 is flat and faces the radiation plate 1 , so that the distance between the side of the refrigeration plate 2 facing the radiation plate 1 and the radiation plate 1 is uniform, thereby making the temperature distribution on the radiation plate 1 uniform.
[0034] Preferably, a black paint coating is provided on one side of the refrigeration plate 2 facing the radiation plate 1 to improve the heat emissivity of the refrigeration plate 2, for example, an organic black paint is coated on one side of the refrigeration plate 2 facing the radiation plate 1. More preferably, the roughness of the side of the refrigeration plate 2 facing the radiation plate 1 is greater than the roughness of the side facing away from the radiation plate 1, that is, the side facing the radiation plate 1 is roughened to further improve the heat emissivity of the refrigeration plate 2, thereby improving the heat exchange rate, saving cooling capacity and improving the refrigeration efficiency.
[0035] In this embodiment, the distance between the refrigeration plate 2 and the radiation plate 1 is 9 mm-11 mm, that is, the distance between the plane of the refrigeration plate 2 and the radiation plate 1 is 9 mm-11 mm, for example, the distance between the plane of the refrigeration plate 2 and the radiation plate 1 is 9 mm, 10 mm or 11 mm, thereby ensuring the refrigeration efficiency and saving space.
[0036] Furthermore, if Figure 4 andFigure 5 As shown in Figure 5 , the vacuum cryogenic surface source black body further includes a fixing member 3 for connecting the refrigeration plate 2 and the radiation plate 1, so that the refrigeration plate 2 and the radiation plate 1 are arranged at intervals. The refrigeration plate 2 is fixed to one side of the radiation plate 1 through the fixing member 3 to ensure a stable distance between the refrigeration plate 2 and the radiation plate 1, thereby ensuring the heat exchange efficiency.
[0037] Exemplarily, the fixing member 3 includes a screw 31 and a nut 32. A first connection hole is formed in the refrigeration plate 2, and a second connection hole is formed in the radiation plate 1. The screw 31 passes through the first connection hole and the second connection hole and is threadedly connected to the nut. It is simple to disassemble and assemble, has a low cost, and has a high connection strength. Of course, in other embodiments, the fixing member 3 can also be other structures. For example, the fixing member 3 includes a fixing column, and both ends of the fixing column are adhesively bonded to the refrigeration plate 2 and the radiation plate 1 respectively.
[0038] Preferably, the fixing member 3 further includes a heat insulation sleeve 33 which is sleeved in the first connection hole and the second connection hole, and the screw 31 is spacedly sleeved in the heat insulation sleeve 33. The setting of the heat insulation sleeve 33 can prevent the screw 31 from contacting the refrigeration plate 2 and the radiation plate 1, avoiding affecting the temperature uniformity on the radiation plate 1, and the spaced setting can further improve the heat insulation property. For example, the heat insulation sleeve 33 is made of epoxy resin, has a low thermal conductivity, and has a good heat insulation effect. Of course, in other embodiments, the screw 31 and the nut 32 can also be directly made of heat insulation materials, saving the heat insulation sleeve 33 and improving the convenience of disassembly and assembly.
[0039] In this embodiment, a plurality of fixing members 3 are provided, and the plurality of fixing members 3 are spacedly connected between the refrigeration plate 2 and the radiation plate 1 along the circumferential direction of the refrigeration plate 2. By arranging the plurality of fixing members 3 circumferentially, the forces on the refrigeration plate 2 and the radiation plate 1 are relatively uniform, avoiding the problem of uneven heat distribution caused by uneven force resulting in uneven spacing between some parts of the refrigeration plate 2 and the radiation plate 1, ensuring the uniformity of heat exchange of the radiation plate 1, so that the temperature distribution on the radiation plate 1 is uniform, and improving the working accuracy of the vacuum cryogenic surface source black body.
[0040] Preferably, the plurality of fixing members 3 are arranged along the edges of the refrigeration plate 2 and the radiation plate 1 to improve the uniformity of the heat exchange between the fixing member 3 and the radiation plate 1 and the refrigeration plate 2, so that the temperature on the radiation plate 1 can be evenly distributed. More preferably, the shapes and sizes of the refrigeration plate 2 and the radiation plate 1 are the same, so that each part of the refrigeration plate 2 and the radiation plate 1 is arranged opposite to each other, that is, the heat exchange uniformity between the radiation plate 1 and the refrigeration plate 2 is satisfied.
[0041] Furthermore, as Figures 1 to 3As shown, the vacuum cryogenic surface source blackbody further includes a heat insulation layer 4, which is disposed around the outer peripheries of the refrigeration plate 2 and the radiation plate 1, and a closed cavity is formed between the refrigeration plate 2, the radiation plate 1 and the heat insulation layer 4. Heat loss from the outer peripheries of the refrigeration plate 2 and the radiation plate 1 is avoided, and the heat exchange efficiency is improved. Preferably, the heat insulation layer 4 is an aluminum film with a high reflectivity, and the outer peripheries of the refrigeration plate 2 and the radiation plate 1 are wrapped by multiple layers of the aluminum film with a high reflectivity, such as 5 layers or 6 layers, etc., which are specifically set according to actual requirements. The aluminum film with a high reflectivity can reflect the heat projected onto it, and improve the heat exchange efficiency of the refrigeration plate 2 and the radiation plate 1.
[0042] Note that the above is only a preferred embodiment of the present invention and the technical principles applied. Those skilled in the art will understand that the present invention is not limited to the specific embodiments described herein. Various obvious changes, re-adjustments and substitutions can be made by those skilled in the art without departing from the protection scope of the present invention. Therefore, although the present invention has been described in more detail through the above embodiments, the present invention is not limited to the above embodiments. Without departing from the concept of the present invention, more other equivalent embodiments can be included, and the scope of the present invention is determined by the scope of the appended claims.
Claims
1. A vacuum low-temperature surface source blackbody, characterized in that, It comprises a radiation plate and a refrigeration plate. The refrigeration plate is spaced apart from the radiation plate. A refrigeration liquid cavity is arranged inside the refrigeration plate. The refrigeration liquid cavity is used for circulating refrigeration liquid.
2. The vacuum cryogenic surface source blackbody according to claim 1, wherein It also includes a fixing member, which is used to connect the refrigeration plate and the radiation plate so that the refrigeration plate and the radiation plate are spaced and fixed.
3. The vacuum cryogenic surface source blackbody according to claim 2, wherein, A plurality of the fixing members are provided, and the plurality of the fixing members are connected between the refrigeration plate and the radiation plate at intervals along the circumferential direction of the refrigeration plate.
4. The vacuum cryogenic surface source black body according to claim 2, wherein, The fixing member includes a screw and a nut. The refrigeration plate is provided with a first connection hole, the radiation plate is provided with a second connection hole, the screw passes through the first connection hole and the second connection hole, and is threadedly connected with the nut.
5. The vacuum cryogenic surface source black body according to claim 4, wherein The fixing member further comprises a heat-insulating sleeve, the heat-insulating sleeve is passed through the first connecting hole and the second connecting hole, and the screws are sleeved in the heat-insulating sleeve at intervals.
6. The vacuum cryogenic surface source blackbody according to any one of claims 1-5, characterized in that, Also includes: The heat-insulating surrounding layer is arranged around the outer periphery of the refrigeration plate and the radiation plate, and a closed cavity is formed between the refrigeration plate, the radiation plate and the heat-insulating surrounding layer.
7. The vacuum cryogenic surface source blackbody according to any one of claims 1-5, characterized in that, One side of the refrigeration plate is flat, and the flat surface faces the radiation plate.
8. The vacuum cryogenic surface source blackbody according to any one of claims 1-5, characterized in that, A black paint coating is provided on one side of the refrigeration plate facing the radiation plate.
9. The vacuum cryogenic surface source blackbody according to any one of claims 1-5, wherein The roughness of a surface of the refrigeration plate facing the radiation plate is greater than the roughness of a surface of the refrigeration plate facing away from the radiation plate.
10. The vacuum cryogenic surface source blackbody according to any one of claims 1-5, characterized in that, The distance between the refrigeration plate and the radiation plate is 9 mm-11 mm.