CN201110669Y - Multiple screen vacuum multiple layer heat-insulated single-stage pulse-tube refrigerator - Google Patents
Multiple screen vacuum multiple layer heat-insulated single-stage pulse-tube refrigerator Download PDFInfo
- Publication number
- CN201110669Y CN201110669Y CNU2007201844953U CN200720184495U CN201110669Y CN 201110669 Y CN201110669 Y CN 201110669Y CN U2007201844953 U CNU2007201844953 U CN U2007201844953U CN 200720184495 U CN200720184495 U CN 200720184495U CN 201110669 Y CN201110669 Y CN 201110669Y
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- CN
- China
- Prior art keywords
- regenerator
- cold
- pulse tube
- valve
- tube refrigerator
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
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Abstract
The utility model discloses a single-stage pulse tube refrigerator of multi-shield vacuum multilayer insulation, which comprises a pulse tube, a regenerator, a compressor, a plane rotary valve, a double-inlet valve, an orifice valve, a gas storage, a cold end heat exchanger and a hot end heat exchanger. The compressor is respectively connected with a regenerator hot end and one end of the double-inlet valve via the plane rotary valve, the gas storage is respectively connected with a pulse tube hot end and the other end of the double-inlet valve via the orifice valve, and two cold shields are respectively led out at temperature positions of 30-40k and 70-80k on the regenerator or three cold shields are led out at temperature positions of 30-40k, 70-80k and 150-160k on the regenerator. The cold shields are connected through copper collars fixed at each temperature position of the regenerator. The single-stage pulse tube refrigerator of multi-shield vacuum multilayer insulation can enable a cold head of the pulse refrigerator to be virtually in high vacuum state through disposing the cold shields between the cold head of the pulse tube refrigerator and heat insulating materials, thereby thermal leakage loss brought by residual gas contained in the multilayer heat insulating material can be reduced, and the multilayer cold shields with different temperatures are led in, thereby thermal leakage loss of radiation can be effectively reduced.
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 multiple-screen vacuum multi-layer heat insulated single-stage pulse tube refrigerator.
Background technology
The pulse tube refrigeration machine technology occupies critical role in modern low-temperature refrigeration technology field.Because of its low-temperature end movement-less part, 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.Its process of refrigerastion is as follows:
1) gases at high pressure enter vascular by flow through regenerator, cool end heat exchanger of controlled transfer valve 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.
2) hot end heat exchanger that is arranged in blind end is taken away heat, makes the interior gas of pipe because of its temperature and pressure of heat release reduction be arranged slightly.
3) transfer valve rotates and to make gas and the direct UNICOM of gas source low pressure side system in, and the gas in the vascular is expanded to the source of the gas passing gradually with laminar flow again, gas expansion step-down and obtain low temperature.
4) transfer valve is changed once more, and system is communicated with the source of the gas high-pressure side, repeats above-mentioned circulation.
The performance of single-stage pulse tube refrigerator has obtained significantly and has promoted at present.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 common Thermo Isolation Technique that adopts of Cryo Refrigerator is a vacuum multi-layer insulation at present, promptly wraps multilayer single face aluminium plating terylene film 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, and the gap is smaller, being difficult to make the residing space of vascular refrigerator cold junction is the space that heat-insulating material encases, reach very high vacuum, therefore can't learn the residing definite vacuum of refrigeration machine cold junction, consequent leakage heat has considerable influence to the performance of 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.
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.This just makes draws cold from regenerator and has feasibility to cold screen.
Summary of the invention
The purpose of this utility model provides a kind of multiple-screen vacuum multi-layer heat insulated single-stage pulse tube refrigerator.
It comprises vascular, regenerator, compressor, plane rotating valve, bidirection air intake valve, little ports valve, air reservoir, cool end heat exchanger, hot end heat exchanger, compressor is connected with regenerator hot junction, bidirection air intake valve one end respectively through plane rotating valve, air reservoir is connected with vascular hot junction, the bidirection air intake valve other end respectively through the aperture valve, 30-40K and 70-80K warm area position are drawn two cold screens respectively on regenerator, and perhaps 30-40K, 70-80K and 150-160K warm area position are drawn three cold screens respectively on regenerator; Cold screen is connected by the copper ring that is fixed on each warm area position of regenerator.
The described cold screen outside is provided with multilayer insulant.
The utility model has changed the vacuum multi-layer insulation mode of traditional single stage vascular refrigerator.Adopt a kind of multiple-screen vacuum multi-layer heat insulated technology, have the following advantages:
1) by cold screen is placed between vascular refrigerator cold head and the heat-insulating material, the vascular refrigerator cold head really is under the high vacuum state, can reduce the leakage heat loss that residual gas that multilayer insulant contains brings;
2) the cold screen of multilayer of introducing different temperatures can effectively reduce radiation and leak heat loss;
3) cold screen of multilayer and multilayer insulant are alternately arranged, can be significantly improved the vacuum between the multilayer insulant, can effectively reduce the leakage heat loss equally.
Description of drawings
Accompanying drawing is the multiple-screen vacuum multi-layer heat insulated system schematic that is used for single-stage pulse tube refrigerator.
Among the figure: vascular 1, regenerator 2, cold screen 3, copper ring 4, compressor 5, plane rotating valve 6, bidirection air intake valve 7, aperture valve 8, air reservoir 9, cool end heat exchanger 10, hot end heat exchanger 11.
The specific embodiment
As shown in drawings, multiple-screen vacuum multi-layer heat insulated single-stage pulse tube refrigerator comprises vascular 1, regenerator 2, compressor 5, plane rotating valve 6, bidirection air intake valve 7, aperture valve 8, air reservoir 9, cool end heat exchanger 10, hot end heat exchanger 11, compressor 5 through plane rotating valve 6 respectively with regenerator 2 hot junctions, bidirection air intake valve 7 one ends are connected, air reservoir 9 through aperture valve 8 respectively with vascular 1 hot junction, bidirection air intake valve 7 other ends are connected, 30-40K and 70-80K warm area position are drawn two cold screens 3, perhaps 30-40K on regenerator 2 respectively on regenerator 2,70-80K and 150-160K warm area position are drawn three cold screens 3 respectively; Cold screen 3 is connected by the copper ring 4 that is fixed on regenerator 2 each warm area position.Described cold screen 3 outsides are provided with multilayer insulant.
Utilize the thermograde on the vascular refrigerator regenerator, 30-40K and 70-80K warm area position are drawn two cold screens 3 respectively on regenerator 2, and perhaps 30-40K, 70-80K and 150-160K warm area position are drawn three cold screens 3 respectively on regenerator 2; Cold screen 3 is connected by the copper ring 4 that is fixed on regenerator 2 each warm area position, can effectively the cold on the regenerator be incorporated on the cold screen, make each cold screen protection be held in uniform temperature, the cold screen temperature of innermost layer is minimum, outwards raise successively, form a thermograde.Arrange the layer 2-3 heat-insulating material between vascular refrigerator cold junction and cold screen, heat-insulating material is also wrapped in the cold screen outside, forms the spaced apart form of cold screen and heat-insulating material.
Claims (2)
1. multiple-screen vacuum multi-layer heat insulated single-stage pulse tube refrigerator, it is characterized in that comprising vascular (1), regenerator (2), compressor (5), plane rotating valve (6), bidirection air intake valve (7), little ports valve (8), air reservoir (9), cool end heat exchanger (10), hot end heat exchanger (11), compressor (5) through plane rotating valve (6) respectively with regenerator (2) hot junction, bidirection air intake valve (7) one ends are connected, air reservoir (9) through little ports valve (8) respectively with vascular (1) hot junction, bidirection air intake valve (7) other end is connected, draw two cold screens (3) respectively at last 30-40K of regenerator (2) and 70-80K warm area position, perhaps go up 30-40K at regenerator (2), 70-80K and 150-160K warm area position are drawn three cold screens (3) respectively; Cold screen (3) is connected by the copper ring (4) that is fixed on each warm area position of regenerator (2).
2. a kind of multiple-screen vacuum multi-layer heat insulated single-stage pulse tube refrigerator according to claim 1 is characterized in that: described cold screen (3) outside is provided with multilayer insulant.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007201844953U CN201110669Y (en) | 2007-10-19 | 2007-10-19 | Multiple screen vacuum multiple layer heat-insulated single-stage pulse-tube refrigerator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007201844953U CN201110669Y (en) | 2007-10-19 | 2007-10-19 | Multiple screen vacuum multiple layer heat-insulated single-stage pulse-tube refrigerator |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201110669Y true CN201110669Y (en) | 2008-09-03 |
Family
ID=39895202
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2007201844953U Expired - Lifetime CN201110669Y (en) | 2007-10-19 | 2007-10-19 | Multiple screen vacuum multiple layer heat-insulated single-stage pulse-tube refrigerator |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201110669Y (en) |
-
2007
- 2007-10-19 CN CNU2007201844953U patent/CN201110669Y/en not_active Expired - Lifetime
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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 |