CN106824309A - A kind of constant thermal apparatus at low temperature of high stable - Google Patents
A kind of constant thermal apparatus at low temperature of high stable Download PDFInfo
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- CN106824309A CN106824309A CN201710059188.0A CN201710059188A CN106824309A CN 106824309 A CN106824309 A CN 106824309A CN 201710059188 A CN201710059188 A CN 201710059188A CN 106824309 A CN106824309 A CN 106824309A
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- low temperature
- temperature
- constant thermal
- thermal apparatus
- refrigeration machine
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01L—CHEMICAL OR PHYSICAL LABORATORY APPARATUS FOR GENERAL USE
- B01L1/00—Enclosures; Chambers
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01L—CHEMICAL OR PHYSICAL LABORATORY APPARATUS FOR GENERAL USE
- B01L7/00—Heating or cooling apparatus; Heat insulating devices
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Abstract
The present invention relates to a kind of constant thermal apparatus at low temperature of high stable, it includes：Refrigeration machine, for being freezed for whole device, working cavity, the refrigeration machine makes its internal temperature be down to predetermined temperature for working cavity provides cold, and double-layer vacuum cylinder is set in the periphery of the working cavity.Cryogenic refrigeration machine vibration of the invention is smaller, and dual shock absorption measure is that working cavity builds good low temperature environment；Cryo Refrigerator load weight is small, and the structure such as double-layer vacuum cylinder, domed bottom effectively reduces the load weight of Conventional cryogenic refrigeration machine；And systems insulation performance is very well, temperature-controlled precision is high, Temperature Distribution and smaller temperature fluctuation with more stable homogeneous.
Description
Technical field
The present invention relates to a kind of thermostat, more particularly to a kind of constant thermal apparatus at low temperature with high stable.
Background technology
Constant thermal apparatus at low temperature is that one kind can provide cryogenic thermostat environment, and has the low of good heat insulation with external environment
Warm device, basic equipment necessary to being low temperature test environment is widely used in sample mechanical property, thermophysical property, light
Learn the occasion of the various low-temperature characteristics measurements such as physical characteristic, magnetic thermal characteristics, superconducting characteristic, and other research equipment device developments
The occasion such as occasion and national defense safety.
At present, commonly use constant thermal apparatus at low temperature and there is a problem of that refrigeration machine vibration is larger, the vibration of such as vascular refrigerator is main
It is to be caused by aspects such as compressor, rotary valve and periodic pressure fluctuations, compressor and rotary valve can produce machinery to shake when working
Dynamic, gases cycle pressure oscillation can then cause the elastic deformation of tube wall in vascular, so as to cause vibration.In order to possess compared with
Good insulation effect, usually includes the structures such as vacuum (-tight) housing, protective shield of radiation in constant thermal apparatus at low temperature, vacuum (-tight) housing size is larger, many
Using materials such as stainless steel, red coppers, and it is solid construction, causes vacuum (-tight) housing weight larger, in addition other thermal insulation such as protective shield of radiation
Structure is also generally solid construction, therefore, whole chiller load weight is big, and corresponding supporting construction size is larger, is occurring asking
Danger coefficient increases during topic.Further, since vacuum (-tight) housing, protective shield of radiation and the isostructural insulation design of flange are less closed
Reason, heat is larger to cause whole device to be leaked, and temperature control system temperature-controlled precision is poor.
To sum up, the temperature-controlled precision of good low temperature environment and high stable is built, it is necessary to constant thermal apparatus at low temperature using closing
The glissando of reason and efficient heat insulating construction.
The content of the invention
Machine vibration is larger present invention aim to address Conventional cryogenic thermostat refrigeration, heavier loads and temperature-controlled precision compared with
The problems such as difference.
The invention provides a kind of constant thermal apparatus at low temperature of high stable, it includes：Refrigeration machine, for being carried out for whole device
Refrigeration, working cavity, the refrigeration machine makes its internal temperature be down to predetermined temperature for working cavity provides cold, in the work
The periphery of cavity sets double-layer vacuum cylinder.
Wherein, the bottom of the double-layer vacuum cylinder is hemispherical.
Wherein, the refrigeration machine is the pulse tube refrigerating machine of low vibration.
Wherein, the constant thermal apparatus at low temperature also includes pin interfaces.
Wherein, the refrigeration machine at least includes one-level cold head and two grades of cold heads.
Wherein, the constant thermal apparatus at low temperature includes at least one temperature measuring thermometer.
Wherein, the constant thermal apparatus at low temperature includes at least one heater.
Wherein, there is the edge for stretching out at the opening of the double-layer vacuum cylinder.
Cryogenic refrigeration machine vibration of the invention is smaller, and dual shock absorption measure is that working cavity builds good low temperature environment；
Cryo Refrigerator load weight is small, and the structure such as double-layer vacuum cylinder, domed bottom effectively reduces the load of Conventional cryogenic refrigeration machine
Weight；And systems insulation performance is very well, temperature-controlled precision is high, Temperature Distribution and smaller temperature wave with more stable homogeneous
It is dynamic.
Brief description of the drawings
Fig. 1 is the structural representation of the constant thermal apparatus at low temperature of high stable of the invention.
Specific embodiment
For the ease of understanding the present invention, embodiments of the invention are illustrated below in conjunction with the accompanying drawings, people in the art
Member should be appreciated that following explanations only to facilitate being explained to invention, and not as the specific restriction to its scope.
Fig. 1 is the structural representation of the constant thermal apparatus at low temperature of high stable of the invention.The constant thermal apparatus at low temperature includes：Refrigeration
Machine 1, the refrigeration machine 1 is used to be freezed for whole device；Working cavity 24, the working cavity 24 provides experiment test
Low temperature accommodation space；Wherein, it is that the offer cold of working cavity 24 makes its internal temperature be down to design temperature by refrigeration machine 1；
The periphery of the working cavity 24 is disposed with double-layer vacuum cylinder 5, one-level protective shield of radiation 14 and two grades of protective shield of radiations 23, in institute
State and be provided with vacuum sleeve 4 between refrigeration machine 1 and double-layer vacuum cylinder 5；The vacuum sleeve 4, double-layer vacuum cylinder 5, one-level
Protective shield of radiation 14 and two grades of protective shield of radiations 23 are together for working cavity 24 provides stable vacuum insulation environment；At least one vacuum
Pipe 25, the vacuum tube 25 is connected with two grades of flanges 22, can be connected with extraneous vavuum pump by cutting ferrule, for keeping by two grades of methods
The confined spaces of orchid 22 and two grades of compositions of protective shield of radiation 23 are operationally in vacuum state；The constant thermal apparatus at low temperature also includes
Leaded interface 26, each of the constant thermal apparatus at low temperature is connected to by the pin interfaces 26 by the lead of extraneous temperature-controlling system
Individual temperature-control units, so that for working cavity 24 provides reliable and stable temperature environment.
As shown in fig. 1, the refrigeration machine 1 is the pulse tube refrigerating machine of low vibration, effective by installing spring damper 2 additional
Solve the mechanical oscillation that produce when vascular refrigerator works, the spring damper 2 be located at refrigeration machine 1 and zero level flange 3 it
Between, the vibration of refrigeration machine 1 is eliminated by spring damper 2, without vibration is passed into zero level flange 3；Refrigeration machine 1 is at least
Including one-level cold head 9 and two grades of cold heads 18, wherein the one-level cold head 9 is connected with one-level flange 13, connected on one-level cold head 9
There are one-level cold head thermometer 7 and one-level cold head heater 8, by the temperature of 7 pairs, the one-level cold head thermometer one-level cold head 9
Degree is measured, and is finely adjusted by the temperature of 8 pairs of one-level cold heads 9 of one-level cold head heater；Two grades of cold heads 18 with
Two grades of flanges 22 are connected, and two grades of cold head thermometers 16 and two grades of cold head heaters 17 are connected with two grades of cold heads 18, by institute
The temperature for stating two grades of 16 pairs, cold head thermometer, two grades of cold heads 18 is measured, by two grades of cold head heaters 17 pairs described two
The temperature of level cold head 18 is finely adjusted；The lower section of the one-level cold head 9 is provided with one-level flexible thermally coupled 10, two grades of cold heads
18 lower section adds two grades of flexibilities thermally coupled 19, can have by the one-level flexible thermally coupled 10 and two grades of flexible hot links 19
Effect reduces the vibration effect that gases cycle pressure oscillation in pulse tube causes tube wall elasticity deformation band；By spring shock absorption
The vibration that device 2, one-level flexible thermally coupled 10 and two grades of thermally coupled 19 dual shock absorption measures of flexibility efficiently solve refrigeration machine 1 is asked
Topic, the flexible connection can eliminate vibration and can preferably be made for elastomeric material and with preferable heat transfer performance
Cold transmission, is that working cavity 24 builds a good low temperature environment.
Be connected with zero level flange 3 in the lower section of the spring damper 2, the one-level flange 13 and zero level flange 3 it
Between be provided with zero level suspension rod 6, one-level suspension rod 15 is set between two grades of flanges 22 and one-level flange 13, by the zero level
Be connected for flange with one-level suspension rod 15 by suspension rod 6, and the simple structure of two-layer suspension rod, installing/dismounting are very convenient, and suspension rod is by exhausted
Hot material is made, while the heat transfer between flange not at the same level can also be reduced.
There is the edge for stretching out at the opening of the double-layer vacuum cylinder 5, the edge can be with the double-layer vacuum
The integrally formed, or independent part coordinated with the opening of double-layer vacuum cylinder 5 of cylinder 5, the vacuum sleeve 4 is located at
Between the edge and zero level flange 3.The vacuum sleeve 4, double-layer vacuum cylinder 5 is connected common structure with one-level protective shield of radiation 14
Confined space is built, two grades of flanges 22 and two grades of protective shield of radiations 23 are engaged to form confined space；Zero level flange 3 with it is true
Empty set cylinder 4, vacuum sleeve 4 and double-layer vacuum cylinder 5, one-level flange 13 and one-level protective shield of radiation 14, two grades of flanges 22 are prevented with two grades
Radiation shield 23 can be attached by bolt connection or other modes, equal detachable；The diameter of double-layer vacuum cylinder 5 is less than described
The diameter of vacuum sleeve 4, double-layer vacuum cylinder 5 is smaller relative to the weight of the vacuum sleeve 4, and double-layer vacuum cylinder 5 of the invention leads to
The weight further reduced using double-layer vacuum structure and domed bottom structure is crossed, first is included by double-layer vacuum cylinder 5
Wall and the second wall, are vacuum form between first wall and the second wall, and first wall is the interior of the double-layer vacuum cylinder 5
Wall, the second wall is the outer wall of the double-layer vacuum cylinder 5, in the case where keeping constant relative to the thickness of traditional vacuum cylinder,
By setting sided configuration, can substantially mitigate the weight of double-layer vacuum cylinder 5, and hollow vacuum structure can also reduce heat
Diffusion.Additionally, one-level protective shield of radiation 14 and two grades of protective shield of radiations 23 also use domed bottom structure, this is not only reduced
Weight, personnel, by said structure, effectively reduce system by the situation of corner angle scratch when being also beneficial to avoid the occurrence of installing/dismounting
The load weight of cold, reduce further danger when accident occurs.
In case study on implementation as shown in Figure 1, the one-level flange 13,14, two grades of flanges 22 of one-level protective shield of radiation and two grades
Protective shield of radiation 23 is gold-plated structure, can effectively reduce radiation heat transfer；In order to the temperature to flange is controlled, in the one-level
One-level flange thermometer 11 and one-level flange heater 12 are set on flange 13, by 11 pairs of one-levels of one-level flange thermometer
The temperature of flange is measured, and is finely adjusted by the temperature of 12 pairs of one-level flanges 13 of one-level flange heater；Described
Two grades of flange thermometers 20 and two grades of flange heaters 21 are set on two grades of flanges 22, by described in two grades of 20 pairs, flange thermometers
The temperature of two grades of flanges 22 is measured, and is finely adjusted by the temperature of two grades of two grades of flanges 22 of flange heater 21 pairs；
Vacuum sleeve 4 and double-layer vacuum cylinder 5 can increase thermal resistance, reduce heat convection and heat transfer heat exchange；The present invention passes through composite adiabatic
The combination of structure, i.e. double-layer vacuum cylinder 5 and vacuum sleeve 4, one-level protective shield of radiation 14 and two grades of bilayers of the composition of protective shield of radiation 23
The double-deck gold-plated flange of gold-plated protective shield of radiation, one-level flange 13 and two grades of compositions of flange 22 ensure that with adiabatic effect well
Really, it is ensured that in working cavity 24, the periphery Temperature Distribution such as one-level protective shield of radiation 14 and two grades of protective shield of radiations 23 it is uniform
Property.In the implementation case, pin interfaces 26 are connected with temperature-controlling system, and temperature-controlling system is by thermometer one-level cold head thermometer
7th, the synchronous acquisition of 11, two grades of one-level flange thermometer, 16, two grades of the cold head thermometer equitemperature parameter of flange thermometer 20, and root
According to temperature real-time regulation heater one-level cold head heater 8,12, two grades of one-level flange heater, 17, two grades of cold head heater method
Blue heater 21, the insulation effect of composite adiabatic well-formed in addition, so as to be the temperature control ring that working cavity 24 provides high stable
Border, wherein temperature fluctuation are better than 1mK.
Cryogenic refrigeration machine vibration of the invention is smaller, and dual shock absorption measure is that working cavity builds good low temperature environment；
Cryo Refrigerator load weight is small, and the structure such as double-layer vacuum cylinder, domed bottom effectively reduces the load of Conventional cryogenic refrigeration machine
Weight；And systems insulation performance is very well, temperature-controlled precision is high, Temperature Distribution and smaller temperature wave with more stable homogeneous
It is dynamic；
Although it is understood that the present invention is disclosed as above with preferred embodiment, but above-described embodiment and being not used to
Limit the present invention.For any those of ordinary skill in the art, in the case where technical solution of the present invention ambit is not departed from,
Many possible variations and modification are all made to technical solution of the present invention using the technology contents of the disclosure above, or is revised as
With the Equivalent embodiments of change.Therefore, every content without departing from technical solution of the present invention, according to technical spirit pair of the invention
Any simple modification, equivalent variation and modification made for any of the above embodiments, still fall within the scope of technical solution of the present invention protection
It is interior.
Claims (8)
1. a kind of constant thermal apparatus at low temperature of high stable, it includes：Refrigeration machine, for being freezed for whole device, working cavity,
The refrigeration machine makes its internal temperature be down to predetermined temperature for working cavity provides cold, it is characterised in that：In the working chamber
The periphery of body sets double-layer vacuum cylinder.
2. constant thermal apparatus at low temperature as claimed in claim 1, it is characterised in that：The bottom of the double-layer vacuum cylinder is hemispherical.
3. constant thermal apparatus at low temperature as claimed in claim 1, it is characterised in that：The refrigeration machine is the pulse tube refrigeration of low vibration
Machine.
4. constant thermal apparatus at low temperature as claimed in claim 1, it is characterised in that：The constant thermal apparatus at low temperature also includes leaded connecing
Mouthful.
5. constant thermal apparatus at low temperature as claimed in claim 1, it is characterised in that：The refrigeration machine at least includes one-level cold head and two
Level cold head.
6. constant thermal apparatus at low temperature as claimed in claim 1, it is characterised in that：The constant thermal apparatus at low temperature includes that at least one surveys
Temperature thermometer.
7. constant thermal apparatus at low temperature as claimed in claim 1, it is characterised in that：The constant thermal apparatus at low temperature includes that at least one adds
Hot device.
8. constant thermal apparatus at low temperature as claimed in claim 1, it is characterised in that：Have at the opening of the double-layer vacuum cylinder outside
The edge of extension.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710059188.0A CN106824309A (en) | 2017-01-23 | 2017-01-23 | A kind of constant thermal apparatus at low temperature of high stable |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710059188.0A CN106824309A (en) | 2017-01-23 | 2017-01-23 | A kind of constant thermal apparatus at low temperature of high stable |
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| Publication Number | Publication Date |
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| CN106824309A true CN106824309A (en) | 2017-06-13 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201710059188.0A Pending CN106824309A (en) | 2017-01-23 | 2017-01-23 | A kind of constant thermal apparatus at low temperature of high stable |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110132791A (en) * | 2019-05-17 | 2019-08-16 | 杭州仰仪科技有限公司 | Liquid cryogen fluidity testing conduction cooling vibration isolation sample container |
| CN110308752A (en) * | 2018-03-27 | 2019-10-08 | 中国科学院理化技术研究所 | A kind of superhigh precision thermostat |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
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