CN201104047Y - Single-screen vacuum multilayer insulation single-stage pulse tube refrigerator - Google Patents
Single-screen vacuum multilayer insulation single-stage pulse tube refrigerator Download PDFInfo
- Publication number
- CN201104047Y CN201104047Y CNU2007201844915U CN200720184491U CN201104047Y CN 201104047 Y CN201104047 Y CN 201104047Y CN U2007201844915 U CNU2007201844915 U CN U2007201844915U CN 200720184491 U CN200720184491 U CN 200720184491U CN 201104047 Y CN201104047 Y CN 201104047Y
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- China
- Prior art keywords
- cold
- pulse tube
- valve
- copper ring
- regenerator
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Abstract
The utility model discloses a single stage pulse tube cooler with single screen vacuum multiplayer heat insulation, comprising a compressor, a rotary valve, an orifice valve, a bidirectional air admission valve, an air bells reservoir, a close cover, a flange, a superheater, a pulse tube, a copper collar, a cold shield, a cold finger and a heat insulating material, wherein, the compressor is connected with the rotary valve which is respectively connected with a hot end of the superheater and one end of the bidirectional air admission valve, the air bells reservoir is respectively connected with a hot end of the pulse tube and the other end of the bidirectional air admission valve through the orifice valve, the temperature area of 30 to 40 K on the lower part of the superheater is provided with the copper collar which is connected with the cold shield, the outer surfaces of the cold finger and the cold shield are wrapped with vacuum aluminized thin-film insulating material. The utility model transfers part of refrigerating output of the middle part of the superheater to the cold shield to ensure that the temperature of the cold shield is kept between 30 to 40 K, thereby decreasing the background temperature of the environment where the cold finger is placed; moreover, the vacuum degree near the cold finger of the cooler can be guaranteed. Therefore, the heat leakage of the cooler at a low temperature can be decreased and the single stage pulse tube cooler can have a lower non-load cryogenic temperature and larger refrigerating output.
Description
Technical field
The utility model relates to the small-sized Cryo Refrigerator in refrigeration and the cryogenic technique field, relates in particular to a kind of single-stage pulse tube refrigerator of screen vacuum multi-layer heat insulated single.
Background technology
The pulse tube refrigeration machine technology occupies critical role in modern low-temperature refrigeration technology field.Because of it has eliminated the displacer under the low temperature, so more reliable than traditional G-M refrigeration machine and sterlin refrigerator, the no maintenance operation time prolongs greatly, and prospect therefore has a very wide range of applications at aspects such as space flight, military affairs.
The basic principle of vascular refrigerator is to utilize high-low pressure gas that the charging and discharging the gas process of vascular cavity obtained refrigeration.The effect of regenerator is the cold of the last circulation gained of accumulation, and passes to and circulate inflow gas next time and the vascular cold junction temperature is reduced down gradually, and its course of work is as follows:
A, gases at high pressure enter vascular by the controlled rotary valve regenerator of flowing through with the laminar flow form, gradually push the interior gas of pipe and move to blind end, make it simultaneously to be squeezed, pressure raises, temperature rises, and reaches peak in the temperature of vascular blind end gas.
B, the heat exchanger that is laid in the vascular hot junction are taken away heat, make that gas has reduction slightly because of its temperature and pressure of heat release in the pipe.
C, rotary valve rotate and make that gas directly is communicated with the compressor low-pressure side system in, and gas is expanded to the compressor passing gradually with laminar flow again in the vascular, gas expansion step-down and obtain low temperature.
D, rotary valve are changed once more, and system is communicated with the compressor high-pressure side, repeat above-mentioned circulation.
Under the member's of seminar continuous effort, we have developed the single-stage pulse tube refrigerator that can reach the 10K warm area, but the method for the single vacuum multilayer heat insulation that adopts the at present development need of incompatibility refrigeration machine.The analysis showed that as calculated the leakage heat of 10K warm area is bigger, in order to make single-stage pulse tube refrigerator obtain lower zero load cryogenic temperature and at the 20K warm area bigger refrigerating capacity to be arranged, this just needs a kind of new Thermo Isolation Technique, and the utility model produces thus.
At present the heat preserving mode that adopts usually of Cryo Refrigerator is a vacuum multi-layer insulation, promptly wraps the multilayer single face terylene of aluminizing on cold head, vascular and the regenerator of refrigeration machine respectively, puts it into then in the vacuum chamber, and the vacuum in the chamber is 10
-3-10
-4Pa.There is a problem in this kind adiabatic method: because the number of plies of heat-insulating material is many, therefore can't learn the definite vacuum in refrigeration machine cold head place, consequent leakage heat has considerable influence to the performance of refrigeration machine.
From other researchers' work, as can be seen, the extension cold does not almost have too much influence to the cryogenic temperature and the Overall Power Consumption of refrigeration machine cold head in the middle part of regenerator.
Summary of the invention
The purpose of this utility model is in order to improve near the vacuum the refrigeration machine cold head, the ambient temperature that reduces cold head place environment simultaneously provides a kind of single-stage pulse tube refrigerator of screen vacuum multi-layer heat insulated single to reduce owing to heat conduction and the hot loss of refrigeration capacity that causes of radiation leakage.
It comprises compressor, rotary valve, little ports valve, bidirection air intake valve, air reservoir, capping, flange, regenerator, vascular, copper ring, cold screen, cold head and heat-insulating material, compressor is connected with rotary valve, rotary valve is connected with an end of regenerator hot junction and bidirection air intake valve respectively, air reservoir is connected with vascular hot junction, the bidirection air intake valve other end respectively through the aperture valve, be provided with copper ring in 30-40K warm area position, regenerator bottom, copper ring is connected with cold screen, is surrounded by the vacuum aluminized film heat-insulating material at the outer surface of cold head and cold screen.
Described copper ring is enclosed within regenerator stainless steel tube outer surface, and perhaps two stainless steel pipes difference scarfwelds are on copper ring.Be provided with the indium sheet between copper ring and regenerator tube wall, copper ring and the cold screen, and use bolted.
The utility model moves on to the part cold at regenerator middle part on the cold screen, and the temperature that makes cold screen greatly reduces the ambient temperature of cold head place environment between 30-40K; And near the vacuum the refrigeration machine cold head also can be guaranteed.Single-stage pulse tube refrigerator can significantly reduce refrigeration machine leakage heat at low temperatures like this, so that can reach lower zero load cryogenic temperature and bigger refrigerating capacity is arranged.
Description of drawings
Fig. 1 is the screen vacuum multi-layer heat insulated single system schematic that is used for single-stage pulse tube refrigerator;
Fig. 2 is that up and down two parts stainless steel tube is nested in the partial schematic diagram of copper ring the inside respectively;
Among the figure: compressor 1, rotary valve 2, aperture valve 3, bidirection air intake valve 4, air reservoir 5, capping 6, flange 7, regenerator 8, vascular 9, copper ring 10, cold screen 11, cold head 12 and heat-insulating material 13.
The specific embodiment
As Fig. 1, shown in 2, the single-stage pulse tube refrigerator of screen vacuum multi-layer heat insulated single comprises compressor 1, rotary valve 2, aperture valve 3, bidirection air intake valve 4, air reservoir 5, capping 6, flange 7, regenerator 8, vascular 9, copper ring 10, cold screen 11, cold head 12 and heat-insulating material 13, compressor 1 is connected with rotary valve 2, rotary valve 2 is connected with an end of regenerator 8 hot junctions and bidirection air intake valve 4 respectively, air reservoir 5 through aperture valve 3 respectively with vascular 9 hot junctions, bidirection air intake valve 4 other ends are connected, be provided with copper ring 10 in 30-40K warm area position, regenerator 8 bottom, copper ring 10 is connected with cold screen 11, is surrounded by vacuum aluminized film heat-insulating material 13 at the outer surface of cold head 12 and cold screen 11.
Described copper ring 10 is enclosed within regenerator 8 stainless steel tube outer surfaces, and perhaps two stainless steel pipes difference scarfwelds are on copper ring 10.Be provided with the indium sheet between copper ring 10 and regenerator 8 tube walls, copper ring and the cold screen, and use bolted.
Specifically method of attachment is, at first wraps heat-insulating material at the cold head of refrigeration machine, secondly copper ring is fixed on the regenerator bottom, then cold screen is connected on the copper ring, more than connects and all uses bolted, wraps heat-insulating material in cold screen outside more at last.
Claims (3)
1. the single-stage pulse tube refrigerator of a screen vacuum multi-layer heat insulated single, it is characterized in that: it comprises compressor (1), rotary valve (2), little ports valve (3), bidirection air intake valve (4), air reservoir (5), capping (6), flange (7), regenerator (8), vascular (9), copper ring (10), cold screen (11), cold head (12) and heat-insulating material (13), compressor (1) is connected with rotary valve (2), rotary valve (2) is connected with an end of regenerator (8) hot junction and bidirection air intake valve (4) respectively, air reservoir (5) through little ports valve (3) respectively with vascular (9) hot junction, bidirection air intake valve (4) other end is connected, be provided with copper ring (10) in 30-40K warm area position, regenerator (8) bottom, copper ring (10) is connected with cold screen (11), is surrounded by vacuum aluminized film heat-insulating material (13) at the outer surface of cold head (12) and cold screen (11).
2. the single-stage pulse tube refrigerator of a kind of screen vacuum multi-layer heat insulated single according to claim 1 is characterized in that, described copper ring (10) is enclosed within regenerator (8) stainless steel tube outer surface, and perhaps two stainless steel pipes difference scarfwelds are on copper ring (10).
3. the single-stage pulse tube refrigerator of a kind of screen vacuum multi-layer heat insulated single according to claim 1 and 2 is characterized in that, is provided with the indium sheet between described copper ring (10) and regenerator (8) tube wall, copper ring (10) and the cold screen (11), and uses bolted.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007201844915U CN201104047Y (en) | 2007-10-19 | 2007-10-19 | Single-screen vacuum multilayer insulation single-stage pulse tube refrigerator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007201844915U CN201104047Y (en) | 2007-10-19 | 2007-10-19 | Single-screen vacuum multilayer insulation single-stage pulse tube refrigerator |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201104047Y true CN201104047Y (en) | 2008-08-20 |
Family
ID=39951075
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2007201844915U Expired - Lifetime CN201104047Y (en) | 2007-10-19 | 2007-10-19 | Single-screen vacuum multilayer insulation single-stage pulse tube refrigerator |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201104047Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104931524A (en) * | 2015-05-15 | 2015-09-23 | 浙江大学 | Multilayer insulation material performance test device |
-
2007
- 2007-10-19 CN CNU2007201844915U patent/CN201104047Y/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104931524A (en) * | 2015-05-15 | 2015-09-23 | 浙江大学 | Multilayer insulation material performance test device |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Effective date of abandoning: 20071019 |
|
| C25 | Abandonment of patent right or utility model to avoid double patenting |