CN1186208A - High and low temperature switching valve type impulse pipe expander refrigeration liquefying flow path and device - Google Patents
High and low temperature switching valve type impulse pipe expander refrigeration liquefying flow path and device Download PDFInfo
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- CN1186208A CN1186208A CN96114013A CN96114013A CN1186208A CN 1186208 A CN1186208 A CN 1186208A CN 96114013 A CN96114013 A CN 96114013A CN 96114013 A CN96114013 A CN 96114013A CN 1186208 A CN1186208 A CN 1186208A
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Abstract
A refrigerating apparatus features that in existing apparatus based on pulse tube refrigerating and liquifying flow, a high- and low-temp switching valve is used to replace orifices and gas accumulator.Its working procedure includes such steps as cooling high-pressure gas into low-temp one by heat exchanger, flowing into pulse tube expander, expanding at cold end of pulse tube to generate gas-liquid mixture, flowing into gas-liquid separator where gas is separated from liquid, reheating low-pressure gas by heat exchanger, exhausting the gas and recovering liquid. Its advantages are adiabatic expansion of gas in pulse tube, high heat efficiency comparable with expander, and simple and reliable structure.
Description
The invention belongs to refrigeration and cryogenic technique field, particularly a kind of height temperature switching valve type impulse pipe expander refrigeration liquefying flow path and device.
Pulse tube refrigerating machine is to obtain a kind of new Refrigeration Technique that develops rapidly in recent years, it utilizes the periodic pressure fluctuation of gas in an elongated thin-walled blank pipe that heat or merit are transferred to the other end from an end of pipe, thereby the end at pipe produces refrigeration effect, and this pipe is called pulse tube.
Utilize the refrigeration of pulse tube to realize that the key of the flow process of liquefaction cycle is to improve pulse tube refrigeration efficient, in conventional pulse tube refrigerating machine, the refrigeration of pulse tube cold junction mainly obtains by aperture air reservoir structure and high pressure throttling refrigeration in theory, and it is relatively poor to compare general decompressor effect.
The objective of the invention is to, overcome above-mentioned shortcoming, a kind of height temperature switching valve type impulse pipe expander refrigeration liquefying flow path and device are provided, for improving refrigerating efficiency, a kind of efficient and the essentially identical impulse pipe expander of conventional decompressor have been proposed, in new construction, remove aperture and air reservoir, and replaced the high temperature transfer valve.
Liquefaction flow path of the present invention is:
1. low temperature intake valve and high-temperature exhaust air valve are opened, and all the other valves cut out, and the high-pressure channel stratification of hot gas enters the pulse tube cold junction, and the stratification of hot gas of pulse tube hot junction flows out to low-pressure channel, and it is constant substantially that the pulse tube internal pressure is kept high pressure;
2. the low temperature intake valve cuts out, and the stratification of hot gas of pulse tube hot junction is flowed out, and enters low-pressure channel, and the pulse tube internal pressure is reduced by height, and pulse tube cold junction gas is realized adiabatic expansion, and temperature reduces, and can be with liquid to expand;
3. the high-temperature exhaust air valve cuts out, and the cryopumping valve is opened, the high temperature INO, and gas slowly enters from the pulse tube hot junction, and pulsus oppressus washing pipe cold junction gas or band liquid gas are discharged by the cryopumping valve, and it is constant substantially to keep low pressure in the pulse tube;
4. the cryopumping valve cuts out, and the high temperature air inlet makes the pulse tube internal pressure be increased to high pressure.
The present invention's height temperature switching valve type impulse pipe refrigeration liquefying device, comprising, heat exchanger, vapour liquid separator one, vapour liquid separator two, choke valve, pulse tube and low temperature switching valve etc., it is characterized in that, upper end at pulse tube is connected to a high temperature transfer valve by pipeline, the intake valve V3 of high temperature transfer valve is connected with the high pressure admission mouth, and the air bleeding valve V4 of high temperature transfer valve is connected with the low pressure exhaust mouth.
For improving refrigerating efficiency, a kind of efficient and the essentially identical impulse pipe expander of conventional decompressor have been proposed here, in new construction, removed aperture and air reservoir, and the generation one of the high temperature transfer valve.
The present invention will be further described below in conjunction with accompanying drawing, wherein:
Fig. 1 is a liquefaction flow path schematic diagram of the present invention.
Fig. 2 is apparatus of the present invention structural representation.
Fig. 3 is circulating pressure of the present invention and valve variation schematic diagram.
At first see also Fig. 2, impulse pipe expander 11 is made up of high temperature transfer valve 8, low temperature switching valve 4 and pulse tube 6, at the two ends of pulse tube 6 laminarization element 5,7 is arranged respectively, the temperature at two ends has very big difference, temperature end is called the hot junction, links to each other with high temperature transfer valve 8, and the intake valve V3 of high temperature transfer valve 8 and high pressure admission mouth HP are connected and connect, the air bleeding valve V4 of high temperature transfer valve 8 is connected with low pressure exhaust mouth LP, forms typical height temperature switching valve type impulse pipe expander 11 like this.
Liquefaction process sees also Fig. 1, shown in Figure 2, high pressure admission is cooled to low temperature in heat exchanger 1, if portion gas liquefaction, separate at vapour liquid separator 1, to vapour liquid separator 29, the gas after vapour liquid separator 1 separates enters pulse tube 6 and expands liquid through choke valve 3, portion gas liquefaction, liquid-vapor mixture flows out pulse tube 6, separates in vapour liquid separator 29, and low-pressure gas re-heat in heat exchanger 1 is returned.
For the impulse pipe expander of being made up of two transfer valves 11, its work change procedure has provided simultaneously at the different phase transfer valve and has opened and closed situation as shown in Figure 3.Big thermograde in the pulse tube is mainly kept by gas piston, shown in rectangular area 10 in Fig. 2 pulse tube 6.The position of gas piston changes with each process, and each change procedure is (as shown in Figure 3):
The 1--2 high pressure admission: low temperature intake valve V1 and high-temperature exhaust air valve V4 open, and all the other are closed,
The high-pressure channel stratification of hot gas enters pulse tube 6, and pulse tube 6 hot junction stratifications of hot gas flow out to
Low-pressure channel, it is constant substantially that pulse tube 6 internal pressures are kept high pressure, gas in this process
Piston length is constant substantially, and the position is held level with both hands by the cold junction thermotropism of pulse tube 6 and moved to a certain position
Put, this position is relevant with pressure ratio and physical dimension.
The 2--3 adiabatic expansion: low temperature intake valve V1 closes, and pulse tube 6 hot junction stratifications of hot gas are by high temperature
Air bleeding valve V4 flows out, and enters low-pressure channel, and pulse tube 6 internal pressures are reduced arteries and veins by height
Washing pipe 6 cold junction gases are realized adiabatic expansion, and temperature reduces, and can be band liquid and expand, and also can
Single phase gas expands, in this process gas piston length according to pressure ratio and elongated, its position
Put in process and at the end reach pulse tube 6 hot junctions.
The 3--4 low pressure exhaust: high-temperature exhaust air valve V4 closes, cryopumping valve V2 and high temperature intake valve
V3 opens, and gas slowly enters from pulse tube 6 hot junctions, pulsus oppressus washing pipe 6 cold junction gases
Or be with liquid gas to discharge by cryopumping valve V2, it is basic to keep low pressure in the pulse tube 6
Constant, gas piston length is constant substantially in this process, and the position is the hottest by pulse tube 6
End moves to cold junction to cold junction.
The 4--5 adiabatic compression: cryopumping valve V2 closes, and the high temperature air inlet makes pulse tube 6 internal pressures
Be increased to high pressure, gas piston shortens gas because of adiabatic compression length in this process
Piston is at the invariant position of cold junction, and is compressed to certain near pulse tube 6 hot junctions to cold junction
One position.
Can find out from top process, in process 2--3, utilize high pressure transfer valve 8 to realize adiabatic expansion, farthest obtain refrigerating capacity theoretically, gas or liquid-vapor mixture enter vapour liquid separator after expanding by process 3--4.
The present invention compared with prior art adopts the high temperature transfer valve to realize adiabatic swollen in the pulse tube Swollen process, its theoretical efficiency is identical with existing decompressor, has reached theoretic maximum cooling capacity, So that the efficient of pulse tube liquefaction cycle reaches the highest, and structure is compared with existing decompressor and simply can Lean on.
Claims (2)
1, a kind of height temperature switching valve type impulse pipe expander refrigeration liquefying flow path is characterized in that, its liquefaction flow path is:
(1) low temperature intake valve and high-temperature exhaust air valve are opened, and all the other valves cut out, and the high-pressure channel stratification of hot gas enters the pulse tube cold junction, and the stratification of hot gas of pulse tube hot junction flows out to low-pressure channel, and it is constant substantially that the pulse tube internal pressure is kept high pressure;
(2) the low temperature intake valve cuts out, and the stratification of hot gas of pulse tube hot junction is flowed out, and enters low-pressure channel, and the pulse tube internal pressure is reduced by height, and pulse tube cold junction gas is realized adiabatic expansion, and temperature reduces, and can be with liquid to expand;
(3) the high-temperature exhaust air valve cuts out, and the cryopumping valve is opened, the high temperature INO, and gas slowly enters from the pulse tube hot junction, and pulsus oppressus washing pipe cold junction gas or band liquid gas are discharged by the cryopumping valve, and it is constant substantially to keep low pressure in the pulse tube;
(4) the cryopumping valve cuts out, and the high temperature air inlet makes the pulse tube internal pressure be increased to high pressure.
2, a kind of height temperature switching valve type impulse pipe expander refrigeration liquefying device, comprising, heat exchanger, vapour liquid separator one, vapour liquid separator two, choke valve, pulse tube etc., it is characterized in that, upper end at pulse tube is connected to a high temperature transfer valve by pipeline, and the intake valve V3 of high temperature transfer valve is connected with the high pressure admission mouth, and the air bleeding valve V4 of high temperature transfer valve is connected with the low pressure exhaust mouth.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 96114013 CN1091239C (en) | 1996-12-25 | 1996-12-25 | High and low temperature switching valve type impulse pipe expander refrigeration liquefying flow path and device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 96114013 CN1091239C (en) | 1996-12-25 | 1996-12-25 | High and low temperature switching valve type impulse pipe expander refrigeration liquefying flow path and device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1186208A true CN1186208A (en) | 1998-07-01 |
| CN1091239C CN1091239C (en) | 2002-09-18 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 96114013 Expired - Fee Related CN1091239C (en) | 1996-12-25 | 1996-12-25 | High and low temperature switching valve type impulse pipe expander refrigeration liquefying flow path and device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1091239C (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100402949C (en) * | 2005-11-25 | 2008-07-16 | 西安交通大学 | High-low temperature changeable graded evaporation air-conditioner heat pump water heater |
| CN106642837A (en) * | 2016-09-28 | 2017-05-10 | 浙江大学 | Regenerative refrigerator with built-in liquefier |
| CN110402356A (en) * | 2017-03-13 | 2019-11-01 | 住友重机械工业株式会社 | The revolution valve cell of ultra-low temperature refrigerating device and ultra-low temperature refrigerating device |
-
1996
- 1996-12-25 CN CN 96114013 patent/CN1091239C/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100402949C (en) * | 2005-11-25 | 2008-07-16 | 西安交通大学 | High-low temperature changeable graded evaporation air-conditioner heat pump water heater |
| CN106642837A (en) * | 2016-09-28 | 2017-05-10 | 浙江大学 | Regenerative refrigerator with built-in liquefier |
| CN106642837B (en) * | 2016-09-28 | 2019-10-15 | 浙江大学 | A kind of philip refrigerator of the built-in liquefier of band |
| CN110402356A (en) * | 2017-03-13 | 2019-11-01 | 住友重机械工业株式会社 | The revolution valve cell of ultra-low temperature refrigerating device and ultra-low temperature refrigerating device |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1091239C (en) | 2002-09-18 |
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