CN219367151U - Multilayer heat insulation cold screen - Google Patents
Multilayer heat insulation cold screen Download PDFInfo
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- CN219367151U CN219367151U CN202320216093.6U CN202320216093U CN219367151U CN 219367151 U CN219367151 U CN 219367151U CN 202320216093 U CN202320216093 U CN 202320216093U CN 219367151 U CN219367151 U CN 219367151U
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- cold screen
- reflecting plate
- constant temperature
- mounting hole
- reflecting
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Abstract
The utility model discloses a multilayer heat-insulating cold screen, which comprises a constant-temperature cold screen, wherein one side of the constant-temperature cold screen is connected with at least one reflecting plate, the constant-temperature cold screen and the reflecting plate are arranged in a non-contact way, one side of the reflecting plate, which is far away from the constant-temperature cold screen, is a reflecting surface, the reflecting plate and the constant-temperature cold screen are connected through a spacing lantern ring, the spacing lantern ring is a heat-insulating material, and the spacing lantern ring is positioned between the constant-temperature cold screen and the reflecting plate.
Description
Technical Field
The utility model relates to the technical field of vacuum heat insulation equipment, in particular to a multi-layer heat insulation cold screen.
Background
The low-temperature heat radiation prevention cold screen is a common way to reduce heat exchange for low-temperature environment equipment in vacuum insulation, so as to maintain a constant temperature of a required low-temperature environment with a small refrigeration load.
Conventional low-temperature heat insulation is based on vacuum heat insulation, and in order to reduce the influence of heat radiation on low-temperature components, a radiation-proof cold screen needs to be arranged. When the cold screen is subjected to radiant heat from the Du Wabi side, the cold screen temperature increases. The conventional approach is to cool the cold shield using a refrigerated thermostatic heat sink and maintain it at a temperature low enough to insulate against heat radiation. And when the temperature difference between the cold screen temperature and the Du Wabi surface is large, larger cold energy is required to be consumed to maintain the low temperature of the cold screen. Therefore, it is common to further wrap a multilayer reflective film around the cold screen surface to form a passive thermal barrier.
Generally, a low-temperature cold screen with a multilayer reflection film is adopted, on one hand, the surface of the cold screen is tightly attached in the vertical direction, and heat conduction exists, so that a relatively obvious temperature difference cannot be formed to isolate heat; on the other hand, for vacuum chambers, the multilayer wound reflective film spacing contains a large amount of fibrous material, which readily absorbs a large amount of gas and moisture at room temperature, affecting the evacuation of the vacuum chamber.
Disclosure of Invention
The utility model aims to provide a multi-layer heat-insulating cold screen, which is characterized in that a multi-layer polished reflecting plate is supported and fixed on an active cooling constant temperature cold screen, so that sufficient radiation heat resistance is provided, heat radiation is isolated, the refrigeration load of the active cooling constant temperature cold screen is not increased, and the problem of absorption of gas and water by using a winding film fiber layer is avoided.
In order to achieve the above purpose, the present utility model provides the following technical solutions:
the utility model provides a cold screen of multilayer heat insulation, includes the cold screen of constant temperature, cold screen one side of constant temperature is connected with at least one piece reflecting plate, the cold screen of constant temperature with the reflecting plate non-contact arrangement, the reflecting plate is kept away from one side of cold screen of constant temperature is the reflecting surface, the reflecting plate with connect through the interval lantern ring between the cold screen of constant temperature, the interval lantern ring is the heat insulation material, the interval lantern ring is located the cold screen of constant temperature with between the reflecting plate.
As a further scheme of the utility model: and a cold chain connecting anchor point is arranged on one side of the constant temperature cold screen.
As a further scheme of the utility model: the reflecting plates are provided with a plurality of reflecting plates, and adjacent reflecting plates are connected through interval lantern rings.
As a further scheme of the utility model: the constant temperature cold screen is provided with a first mounting hole, the reflecting plate is provided with a second mounting hole, the interval lantern ring is of a hollow annular structure, and a supporting fixing screw rod used for fixedly connecting the constant temperature cold screen, the reflecting plate and the interval lantern ring is used in the first mounting hole, the second mounting hole and the interval lantern ring.
As a further scheme of the utility model: the spacing lantern ring comprises a first ring body and a second ring body which are concentrically arranged, the second ring body is inserted into the second mounting hole, the outer diameter of the first ring body is not smaller than the inner diameters of the first mounting hole and the second mounting hole, and the thickness of the second ring body is not larger than the thickness of the reflecting plate.
As a further scheme of the utility model: the reflecting plate is provided with four pieces, and the four pieces of reflecting plates are uniformly arranged on one side of the constant-temperature cold screen.
As a further scheme of the utility model: the reflecting plate is a polished reflecting plate, and the reflecting plate is a polished surface or a brightening coating to form a reflecting surface.
Compared with the prior art, the utility model has the beneficial effects that: the multi-layer support cold screen structure is novel in structure, the multi-layer reflecting plates are bright surfaces, and the reflecting plates are supported in a heat-insulating mode through the spacing lantern rings, so that the multi-layer superposition heat radiation shielding effect is achieved.
Drawings
FIG. 1 is a schematic diagram of the structure of the present embodiment;
FIG. 2 is a schematic view of the structure of the cold screen of the present embodiment;
FIG. 3 is a cross-sectional view of the present embodiment;
fig. 4 and 5 are schematic views of a spacer collar structure according to the present embodiment;
in the figure: the cooling device comprises a 1-constant temperature cooling screen, a 2-supporting fixing screw, a 3-reflecting plate, a 4-interval lantern ring, a 5-cold chain connecting anchor point, a 6-first mounting hole, a 7-second mounting hole, an 8-low temperature end, a 9-high temperature end, a 10-first ring body and an 11-second ring body.
Detailed Description
The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.
Referring to fig. 1-5, in an embodiment of the present utility model, a multi-layer heat insulation cold screen includes a constant temperature cold screen 1, a cold chain connection anchor point 5 is provided on one side of the constant temperature cold screen 1, an external constant temperature heat sink is connected to maintain the constant temperature of the whole structure, one side of the constant temperature cold screen 1 is connected with at least one reflecting plate 3, and a plurality of reflecting plates 3 may be provided according to needs, in this embodiment, four reflecting plates 3 are provided, and the four reflecting plates 3 are uniformly arranged on one side of the constant temperature cold screen 1.
One side of the reflecting plate 3 far away from the constant temperature cold screen 1 is a reflecting surface, the reflecting plate 3 is a polished reflecting plate, the surface of the reflecting plate 3 is a polished surface or a brightening coating layer and then forms a reflecting surface, the reflecting plate and the constant temperature cold screen 1 and the adjacent reflecting plates 3 are connected through a spacing sleeve ring 4, the constant temperature cold screen 1 and the reflecting plate 3 are further arranged in a non-contact mode, the spacing sleeve ring 4 is made of a heat insulating material, the spacing sleeve ring 4 is positioned between the constant temperature cold screen 1 and the reflecting plate 3, in the embodiment, a first mounting hole 6 is formed in the constant temperature cold screen 1, a second mounting hole 7 is formed in the reflecting plate 3, the spacing sleeve ring 4 is of a hollow annular structure, a supporting fixing screw rod 2 for fixedly connecting the constant temperature cold screen 1, the reflecting plate 3 and the spacing sleeve ring 4 is used in the spacing sleeve ring 4, the spacing sleeve ring 4 comprises a first ring body 10 and a second ring body 11 which are concentrically arranged, the outer diameter of the first ring body 10 is not smaller than the inner diameter of the first mounting hole 6 and the second ring body 11, and the thickness of the second ring body 11 is not larger than the thickness of the reflecting plate 3.
When the utility model is used, the heat radiation shielding capability is provided by hanging the multi-layer polishing reflecting plate through the structural heat insulation support, the heat radiation thermal resistance is provided by the surface of the reflecting plate, and the heat radiation is shielded and attenuated, in the embodiment, the reflecting plate can be provided with multiple layers, the heat radiation shielding effect is overlapped through the multiple layers, the constant temperature cold screen 1 at the bottom layer maintains constant temperature through cooling, and the low heat radiation temperature of the low temperature end 8 is provided. In this example, the plate spacing is small, the radiation area between any two plates is equal, the thermal resistance can be expressed as,
wherein ε 1 ，ε 2 The surface emissivity of the two plates, respectively. Thus, the multi-layer insulating cold screen provides good radiant insulation capability by thermally insulating the suspended support multi-layer polishing emitter plate.
The mode of the cold screen surface cladding reflective film that traditional anti-radiation adiabatic scheme adopted, though through multilayer stack cladding, can realize the effect of similar multilayer cold screen, but more stack cladding, the stronger the ability of layer absorption gas and moisture between them, the longer the vacuum relaxation time is unfavorable for the vacuum maintenance of low temperature cavity, and this embodiment is through setting up the technical scheme of multilayer reflecting plate, does not introduce the fibrous material that easily absorbs gas and moisture, has improved cavity vacuum maintenance ability.
It will be evident to those skilled in the art that the utility model is not limited to the details of the foregoing illustrative embodiments, and that the present utility model may be embodied in other specific forms without departing from the spirit or essential characteristics thereof. The present embodiments are, therefore, to be considered in all respects as illustrative and not restrictive, the scope of the utility model being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.
Furthermore, it should be understood that although the present disclosure describes embodiments, not every embodiment is provided with a separate embodiment, and that this description is provided for clarity only, and that the disclosure is not limited to the embodiments described in detail below, and that the embodiments described in the examples may be combined as appropriate to form other embodiments that will be apparent to those skilled in the art.
Claims (7)
1. The utility model provides a multilayer heat insulation cold screen, its characterized in that, including constant temperature cold screen (1), constant temperature cold screen (1) one side is connected with at least one piece reflecting plate (3), constant temperature cold screen (1) with reflecting plate (3) non-contact arrangement, the surface of reflecting plate (3) is the reflecting surface, the reflecting plate with be connected through interval lantern ring (4) between constant temperature cold screen (1), interval lantern ring (4) are heat insulation material, interval lantern ring (4) are located constant temperature cold screen (1) with between reflecting plate (3).
2. A multi-layer heat-insulating cold screen according to claim 1, characterized in that a cold chain connection anchor point (5) is provided on one side of the thermostatic cold screen (1).
3. A multi-layer heat insulating cold screen according to claim 1, wherein a plurality of reflecting plates (3) are provided, adjacent reflecting plates (3) being connected by spacer collars (4).
4. A multi-layer heat-insulating cold screen according to claim 3, wherein the constant temperature cold screen (1) is provided with a first mounting hole (6), the reflecting plate (3) is provided with a second mounting hole (7), the spacing lantern ring (4) is of a hollow annular structure, and the first mounting hole (6), the second mounting hole (7) and the spacing lantern ring (4) are internally provided with a supporting fixing screw (2) for fixedly connecting the constant temperature cold screen (1), the reflecting plate (3) and the spacing lantern ring (4).
5. A multi-layer heat insulating cold screen according to claim 4, wherein the spacer collar (4) comprises a first ring body (10) and a second ring body (11) which are concentrically arranged, the second ring body (11) is inserted into the second mounting hole (7), the outer diameter of the first ring body (10) is not smaller than the inner diameters of the first mounting hole (6) and the second mounting hole (7), and the thickness of the second ring body (11) is not larger than the thickness of the reflecting plate (3).
6. A multi-layer heat-insulating cold screen according to claim 1, characterized in that the reflecting plate (3) is provided with four sheets, the four sheets of reflecting plate (3) being uniformly arranged on one side of the thermostatic cold screen (1).
7. A multi-layer adiabatic cold screen as claimed in claim 1, wherein the reflecting plate (3) is a polished reflecting plate, and the surface of the reflecting plate (3) is a polished surface or a polished surface formed by a brightness enhancing coating.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320216093.6U CN219367151U (en) | 2023-02-02 | 2023-02-02 | Multilayer heat insulation cold screen |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320216093.6U CN219367151U (en) | 2023-02-02 | 2023-02-02 | Multilayer heat insulation cold screen |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219367151U true CN219367151U (en) | 2023-07-18 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202320216093.6U Active CN219367151U (en) | 2023-02-02 | 2023-02-02 | Multilayer heat insulation cold screen |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219367151U (en) |
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2023
- 2023-02-02 CN CN202320216093.6U patent/CN219367151U/en active Active
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