CN208443067U - It is a kind of to inhibit structure by the fluctuation of the combined temp of cold source of refrigeration machine - Google Patents
It is a kind of to inhibit structure by the fluctuation of the combined temp of cold source of refrigeration machine Download PDFInfo
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- CN208443067U CN208443067U CN201820486498.0U CN201820486498U CN208443067U CN 208443067 U CN208443067 U CN 208443067U CN 201820486498 U CN201820486498 U CN 201820486498U CN 208443067 U CN208443067 U CN 208443067U
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Abstract
Inhibit structure by the fluctuation of the combined temp of cold source of refrigeration machine the utility model relates to a kind of comprising: refrigeration machine provides cold source；Refrigeration machine cooled end flange is connected to the refrigeration machine；Sample flange, is attached with sample；It is provided with combined temp fluctuation between cold section of flange of the refrigeration machine and the sample flange and inhibits structure.The utility model combines the respective advantage of both Capacity method and heat resistance method, temperature fluctuation is reduced using laminar thermal capacitance material and temperature is not caused to increase substantially, temperature fluctuation is reduced using elongated and thermal resistance material with high thermal conductivity and does not cause temperature to increase substantially；The form that thermal capacitance material is all made of the low temperature glue of high thermal conductivity coefficient or directly welds is connected with other component, has prevented the uncontrollable disadvantage of thermal contact resistance caused by being threadedly coupled.
Description
Technical field
The present invention relates to a kind of temperature fluctuations to inhibit structure, more particularly to a kind of using refrigeration machine as the combined temp of cold source
Fluctuation inhibits structure.
Background technique
GM refrigeration machine or GM pulse tube refrigerating machine are the 4K warm area refrigeration machine of currently the only commercialization, in low-temperature physics, doctor
There is important application in etc. fields, especially in the cryogenic system using refrigeration machine as cold source, GM refrigeration machine or GM pulse control
The advantages that cold is due to without cryogenic liquid, operation convenient, long operational time and more and more applied.
Since GM refrigeration machine or GM pulse tube refrigerating machine need periodic pressure wave driving just to can produce refrigeration effect,
Cyclic fluctuation is presented in the variation that the temperature of its internal working medium will be with pressure, and the specific heat capacity of the materials such as copper is very under low temperature in addition
It is small, so that there is fluctuation by a relatively large margin (about in the temperature outside GM refrigeration machine or GM pulse tube refrigerating machine cool end heat exchanger
200mK-500mK), so cryogenic sample can not usually be directly installed on refrigeration machine cold end and be tested.To make refrigeration machine cold end
Temperature obtains effective attenuation, and common practice is divided into two kinds at present, and one is Capacity methods, i.e., between refrigeration machine cold end and sample
Increase the low temperature high specific heat materials such as liquid helium chamber, lead；Another way is heat resistance method, i.e., increases between refrigeration machine cold end and sample
Add low Heat Conduction Material.Wherein Capacity method will will increase the weight bearing and complexity of refrigeration machine cold end, and temperature fluctuation inhibitory effect
It is limited；And heat resistance method will make sample with refrigeration machine that there are the biggish temperature difference, increase the minimum temperature of sample.
For the deficiency of current refrigeration machine cold junction temperature fluctuation suppressing method, need to propose a kind of simple effective method with
Realize the efficient inhibition of sample temperature fluctuation.
Summary of the invention
Present invention aim to address tradition using refrigeration machine as in the sample structure of cold source and its temperature fluctuation suppressing method
The problems such as existing volume is big, quality weight, structure is complicated, entire thermal resistance is difficult to control and minimum temperature increases.
Inhibit structure by the fluctuation of the combined temp of cold source of refrigeration machine the present invention provides a kind of comprising: refrigeration machine,
Cold source is provided；Refrigeration machine cooled end flange is connected to the refrigeration machine；Sample flange, is attached with sample；In the system
It is provided with combined temp fluctuation between cold section of flange of cold and the sample flange and inhibits structure.
Wherein, it includes the first thermal capacitance material, thermal resistance material and the second thermal capacitance material that the combined temp fluctuation, which inhibits structure,.
Wherein, stating the first thermal capacitance material is HoCu2、Er3Ni、Er0.5Pr0.5Or the magnetic materials such as ErNi.
Wherein, the first thermal capacitance material is the material having under other low temperature such as lead compared with high specific heat capacity.
Wherein, the second thermal capacitance material is HoCu2、Er3Ni、Er0.5Pr0.5Or the magnetic materials such as ErNi.
Wherein, the second thermal capacitance material is the material having under other low temperature such as lead compared with high specific heat capacity.
Wherein, the first thermal capacitance material is identical as the material of the second thermal capacitance material.
Wherein, the first thermal capacitance material is not identical as the material of the second thermal capacitance material.
Wherein, the thermal resistance material is to have high thermal conductivity under the low temperature such as high-purity oxygen-free copper, rafifinal, sapphire or graphene
The material of coefficient.
Wherein, the refrigeration machine is the pulse tube refrigerating machine of low vibration, provides the operating temperature of 2.2K-300K for sample.
It is fluctuated the invention proposes a kind of combined temp and inhibits structure, so that the small temperature difference can be realized using simple structure
Under temperature fluctuation efficiently inhibit.
Detailed description of the invention
Fig. 1 is that combined temp fluctuation of the invention inhibits structural schematic diagram.
Specific embodiment
To facilitate the understanding of the present invention, the embodiment of the present invention is illustrated with reference to the accompanying drawing, those skilled in the art
Member should be appreciated that following explanations only to facilitate explaining to invention, and not as the specific restriction to its range.
It is fluctuated the present invention provides a kind of combined temp and inhibits structure, Fig. 1 is inhibition structural schematic diagram of the invention.Such as figure
Shown in 1, it includes: refrigeration machine 1, refrigeration machine cooled end flange 2, the first thermal capacitance material 3- that combined temp fluctuation of the invention, which inhibits structure,
1, thermal resistance material 3-2, the second thermal capacitance material 3-3, sample flange 4.Wherein refrigeration machine 1 is cold source needed for sample measurement；3-1,
3-2 and 3-3 formation inhibits temperature fluctuation to be transferred to sample flange 4 at composite construction；So that sample flange 4 mentions for sample
For pulsation-free steady temperature.
In case study on implementation as shown in Figure 1, refrigeration machine 1 is the pulse tube refrigerating machine of low vibration, can provide for sample
The operating temperature of 2.2K-300K, the at this time original fluctuation about 200mK-500mK of the temperature of refrigeration machine cooled end flange.It is preferred that the system
Cold 1 can for GM refrigeration machine or GM pulse tube refrigerating machine, VM refrigeration machine, VM pulse tube refrigerating machine, sterlin refrigerator, this
Special crop type pulse tube refrigerating machine etc. other use pressure wave driving refrigeration machine form.
First thermal capacitance material 3-1 is flake, and is pasted onto refrigeration machine cooled end flange 2 by the low temperature glue of high thermal conductivity coefficient
On.The first thermal capacitance material 3-1 and refrigeration machine cooled end flange 2 can be bonded using the low temperature glue of high thermal conductivity coefficient,
Other welding forms such as soldering, silver soldering can be used to be attached.
The shape of the first thermal capacitance material 3-1 can may be other polygons for circle, and thickness be preferably
0.01mm-10mm, equivalent diameter can be the arbitrary dimension less than refrigeration machine cooled end flange 2；The first thermal capacitance material is excellent
It is selected as HoCu2、Er3Ni、Er0.5Pr0.5Or the magnetic materials such as ErNi；It may be to have under other low temperature such as lead compared with high specific heat capacity
Material.
The first thermal capacitance material 3-1 specific heat with higher at low temperature, thermal diffusion coefficient is low, thus from its upper surface
It is transferred to the available effective attenuation of temperature fluctuation of lower surface, temperature fluctuation can decay to 10mK or so, due to the first thermal capacitance
Material 3-1 thickness is thin, the basic indifference of the mean temperature of top and bottom.
Thermal resistance material 3-2 is connected with the first thermal capacitance material 3-1, the thermal resistance material 3-2 and first thermal capacitance
It can be used between material 3-1 and be attached using other welding forms such as soldering, silver soldering, it can also be using the low of high thermal conductivity coefficient
Warm glue is bonded.
Thermal resistance material 3-2 is soldered to together with thermal capacitance material 3-1, and thermal resistance material 3-2, which is selected, has high thermal conductivity system under low temperature
Several elongated strip materials, high thermal conductivity coefficient can guarantee mean temperature do not increase substantially, elongate, threadlike guarantee its sectional area it is small and
Length is long, so that temperature fluctuation is inhibited, so when temperature fluctuation reaches lower end by the upper end of thermal resistance material 3-2, temperature
Fluctuation can further decay to 1mK or so.
Thermal resistance material 3-2 can be filament shape, and preferably a diameter of 0.1mm-5mm can also be flake, with a thickness of
0.1mm-5mm, length can be 1mm-1m；It can make one when use, or the more or more pencil shapes twined
Formula, radical 1-10000 root.Thermal resistance material 3-2 can be high-purity oxygen-free copper, can also be rafifinal, sapphire, graphene etc.
With the material of high thermal conductivity coefficient under low temperature；The shape of thermal resistance material 3-2 can be C-shaped, or linear type, S-shaped etc. its
Its shape, interface shape can be any suitable shapes such as semicircle or round or ellipse.
Second thermal capacitance material 3-3 can be selected from HoCu2、Er3Ni、Er0.5Pr0.5Or the magnetic materials such as ErNi, or lead
Deng the material having under other low temperature compared with high specific heat capacity；The shape of second thermal capacitance material 3-3 can may be other for circle
Polygon, with a thickness of 0.1mm-10mm, equivalent diameter can be the arbitrary dimension less than sample flange 4.Second heat
Capacity materials 3-3 is flake, and the upper surface of the second thermal capacitance material 3-3 is connected with thermal resistance material 3-2, the thermal resistance material
It can be used between 3-2 and the second thermal capacitance material 3-3 and be attached using other welding forms such as soldering, silver soldering, it can also be with
It is bonded using the low temperature glue of high thermal conductivity coefficient；The lower surface of the second thermal capacitance material 3-3 is low by high thermal conductivity coefficient
Warm glue is on sample flange 4.Do not limit between second thermal capacitance material 3-3 and sample flange 2 using the low of high thermal conductivity coefficient
Warm glue is bonded, and other welding forms such as soldering, silver soldering can also be used and be attached.With the principle of the first thermal capacitance material 3-1
Equally, temperature fluctuation further can decay to 0.1mK after by thermal capacitance material 3-3 hereinafter, and whole mean temperature base
This is consistent with refrigeration machine cooled end flange 3-1.
The first thermal capacitance material 3-1 and the second thermal capacitance material 3-3 can be same material, can also be different materials
Material；Composite construction is formed using the first thermal capacitance material 3-1, thermal resistance material 3-2 and the second thermal capacitance material 3-3 and connects refrigeration machine cold end
When flange 2 and sample flange 4,1 group can be used, multiple groups can also be used, quantity can be 1-100 group.
Present invention incorporates the respective advantages of both Capacity method and heat resistance method, reduce temperature using laminar thermal capacitance material
It fluctuates and temperature is not caused to increase substantially, temperature fluctuation is reduced using elongated and thermal resistance material with high thermal conductivity and do not draw substantially
Temperature is played to increase；The form that thermal capacitance material is all made of the low temperature glue of high thermal conductivity coefficient or directly welds is connected with other component,
The uncontrollable disadvantage of thermal contact resistance caused by being threadedly coupled is prevented.
It is understood that although the present invention has been disclosed in the preferred embodiments as above, above-described embodiment not to
Limit the present invention.For any person skilled in the art, without departing from the scope of the technical proposal of the invention,
Many possible changes and modifications all are made to technical solution of the present invention using the technology contents of the disclosure above, or are revised as
With the equivalent embodiment of variation.Therefore, anything that does not depart from the technical scheme of the invention are right according to the technical essence of the invention
Any simple modifications, equivalents, and modifications made for any of the above embodiments still fall within the range of technical solution of the present invention protection
It is interior.
Claims (10)
1. a kind of inhibit structure by the fluctuation of the combined temp of cold source of refrigeration machine comprising: refrigeration machine provides cold source；Refrigeration
Machine cooled end flange is connected to the refrigeration machine；Sample flange, is attached with sample；It is characterized by: in the refrigeration
It is provided with combined temp fluctuation between cold section of flange of machine and the sample flange and inhibits structure.
2. combined temp fluctuation as described in claim 1 inhibits structure, it is characterised in that: the combined temp fluctuation inhibits knot
Structure includes the first thermal capacitance material, thermal resistance material and the second thermal capacitance material.
3. combined temp as claimed in claim 2 fluctuation inhibits structure, it is characterised in that: the first thermal capacitance material is
HoCu2、Er3Ni、Er0.5Pr0.5Or the magnetic materials such as ErNi.
4. combined temp fluctuation as claimed in claim 2 inhibits structure, it is characterised in that: the first thermal capacitance material is lead
Deng the material having under other low temperature compared with high specific heat capacity.
5. combined temp as claimed in claim 2 fluctuation inhibits structure, it is characterised in that: the second thermal capacitance material is
HoCu2、Er3Ni、Er0.5Pr0.5Or the magnetic materials such as ErNi.
6. combined temp fluctuation as claimed in claim 2 inhibits structure, it is characterised in that: the second thermal capacitance material is lead
Deng the material having under other low temperature compared with high specific heat capacity.
7. combined temp fluctuation as claimed in claim 2 inhibits structure, it is characterised in that: the first thermal capacitance material and second
The material of thermal capacitance material is identical.
8. combined temp fluctuation as claimed in claim 2 inhibits structure, it is characterised in that: the first thermal capacitance material and second
The material of thermal capacitance material is not identical.
9. combined temp fluctuation as claimed in claim 2 inhibits structure, it is characterised in that: the thermal resistance material is high-purity anaerobic
With the material of high thermal conductivity coefficient under the low temperature such as copper, rafifinal, sapphire or graphene.
10. combined temp fluctuation as described in claim 1 inhibits structure, it is characterised in that: the refrigeration machine is low vibration
Pulse tube refrigerating machine provides the operating temperature of 2.2K-300K for sample.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820486498.0U CN208443067U (en) | 2018-04-08 | 2018-04-08 | It is a kind of to inhibit structure by the fluctuation of the combined temp of cold source of refrigeration machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820486498.0U CN208443067U (en) | 2018-04-08 | 2018-04-08 | It is a kind of to inhibit structure by the fluctuation of the combined temp of cold source of refrigeration machine |
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| Publication Number | Publication Date |
|---|---|
| CN208443067U true CN208443067U (en) | 2019-01-29 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201820486498.0U Active CN208443067U (en) | 2018-04-08 | 2018-04-08 | It is a kind of to inhibit structure by the fluctuation of the combined temp of cold source of refrigeration machine |
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2018
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