CN2465122Y - Device for adjusting cold end air flow phase of pulse tube refrigerator - Google Patents
Device for adjusting cold end air flow phase of pulse tube refrigerator Download PDFInfo
- Publication number
- CN2465122Y CN2465122Y CN01203696U CN01203696U CN2465122Y CN 2465122 Y CN2465122 Y CN 2465122Y CN 01203696 U CN01203696 U CN 01203696U CN 01203696 U CN01203696 U CN 01203696U CN 2465122 Y CN2465122 Y CN 2465122Y
- Authority
- CN
- China
- Prior art keywords
- pulse tube
- cold junction
- liquid helium
- refrigerating machine
- phase place
- 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 - Fee Related
Links
- 239000001307 helium Substances 0.000 claims abstract description 54
- 229910052734 helium Inorganic materials 0.000 claims abstract description 54
- SWQJXJOGLNCZEY-UHFFFAOYSA-N helium atom Chemical compound [He] SWQJXJOGLNCZEY-UHFFFAOYSA-N 0.000 claims abstract description 54
- 239000007788 liquid Substances 0.000 claims abstract description 48
- 229910001220 stainless steel Inorganic materials 0.000 claims abstract description 15
- 239000010935 stainless steel Substances 0.000 claims abstract description 14
- 238000005057 refrigeration Methods 0.000 claims description 36
- 230000001105 regulatory effect Effects 0.000 claims description 22
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 10
- 229910052802 copper Inorganic materials 0.000 claims description 10
- 239000010949 copper Substances 0.000 claims description 10
- 239000000463 material Substances 0.000 claims description 3
- 239000011148 porous material Substances 0.000 claims description 2
- 239000007789 gas Substances 0.000 description 12
- 230000000694 effects Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 125000004122 cyclic group Chemical group 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
Images
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B9/00—Compression machines, plants or systems, in which the refrigerant is air or other gas of low boiling point
- F25B9/14—Compression machines, plants or systems, in which the refrigerant is air or other gas of low boiling point characterised by the cycle used, e.g. Stirling cycle
- F25B9/145—Compression machines, plants or systems, in which the refrigerant is air or other gas of low boiling point characterised by the cycle used, e.g. Stirling cycle pulse-tube cycle
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B2309/00—Gas cycle refrigeration machines
- F25B2309/14—Compression machines, plants or systems characterised by the cycle used
- F25B2309/1411—Pulse-tube cycles characterised by control details, e.g. tuning, phase shifting or general control
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Mechanical Engineering (AREA)
- Thermal Sciences (AREA)
- General Engineering & Computer Science (AREA)
- Separation By Low-Temperature Treatments (AREA)
Abstract
The utility model relates to a device for adjusting cold end air flow phase of pulse tube refrigerator sets up liquid helium groove at current pulse tube refrigerator cold junction, liquid helium groove is by thin wall stainless steel pipe intercommunication refrigerator hot end, and be linked together with the pulse tube through micropore on its cold junction heat exchanger ring flange, thin wall stainless steel pipe centers on the regenerator pipe wall of refrigerator, introduce the micro-air flow through the precooling to cold junction liquid helium groove from the refrigerator hot end, do not introduce any mechanical motion part, under the condition of keeping the inherent characteristics of pulse tube refrigerator, adjust the phase place between pulse tube cold junction working medium air flow pressure and the flow, improve the refrigerator refrigerating output, the steam generator is simple in structure, high reliability.
Description
The utility model belongs to refrigeration and cryogenic technique field, particularly a kind of device of regulating impulse pipe refrigeration machine cold junction air-flow phase place.
For the closed circulation refrigeration machine, pulse tube refrigerating machine is developed rapidly in recent years.It utilizes the air-flow of one pressure cycle variation to vibrate in the pipe of a low heat conductivity and finishes process of refrigerastion.Be that with traditional GM refrigeration machine and sterlin refrigerator fundamental difference the low-temperature end of pulse tube refrigerating machine does not have mechanical movement piston or displacer, it replaces the reciprocating displacer of cold head with " gas piston " that vibrates in the light-wall pipe.Their thermodynamic cycle is similar, all be compressor generation pressure wave and mass flow by a working and room temperature, make it the regenerator that is filled with big specific heat porous media by one, pressure wave by regulating the regenerator other end and the phase difference between the mass flow obtain refrigeration.For GM refrigeration machine and sterlin refrigerator, this phase difference is to be realized by the relative motion with certain phase relation of cold junction mechanical movement piston or displacer and compressor piston.And for pulse tube refrigerating machine, this phase difference is to realize by the motion of being regulated " gas piston " by aperture and air reservoir, is suitable phase relation so improve the basic reason of its efficient.
Pulse tube refrigerating machine has experienced aperture, bidirection air intake, double-piston, multi-channel shunt, repeatedly great improvement such as second aperture, they all are in order to improve the phase place between pulse tube refrigerating machine internal working medium stream pressure and the flow, at the various phase-shifters that the hot junction of pulse tube refrigerating machine is arranged, this improves pulse tube refrigeration engine efficiency and refrigeration performance greatly.According to the data of having reported, the refrigeration performance of single-stage pulse tube refrigerating machine and efficient have reached the level of GM refrigeration machine and sterlin refrigerator.But, for liquid helium warm area multi-stage pulse tube refrigeration machine, present efficient is the 30%-50% of GM refrigeration machine, experiment measuring by us is found, though wherein topmost problem is the effectively stream pressure in regulating impulse pipe hot junction and the phase place between the flow of above-mentioned hot junction phase-shifter, make it to reach optimum value, but stream pressure and the phase adjusted effect between the flow for liquid helium warm area pulse tube refrigerating machine cold junction are little, because this moment, the gas temperature of cold junction was in the liquid helium warm area, density is very big, and the phase modulation effect of hot junction phase-shifter is very little.
The purpose of this utility model is to overcome the deficiency that above-mentioned hot junction phase-shifter can only regulating impulse pipe refrigeration machine hot junction phase place, and a kind of stream pressure of pulse tube refrigerating machine cold junction and phase place between the flow of regulating be provided, improve the device of the regulating impulse pipe refrigeration machine cold junction air-flow phase place of the efficient of liquid helium warm area pulse tube refrigerating machine and refrigeration performance.
Embodiment of the present utility model is as follows:
The device of the regulating impulse pipe refrigeration machine cold junction air-flow phase place that the utility model provides, it is characterized in that, at the pulse tube refrigerating machine cold junction liquid helium groove is set, the liquid helium groove is communicated with the hot junction of pulse tube refrigerating machine by thin-wall stainless steel, and is connected with pulse tube by the micropore on the pulse tube refrigerating machine cool end heat exchanger ring flange; Described thin-wall stainless steel is wrapped on the regenerator tube wall of pulse tube refrigerating machine; Micro-pore diameter on the described pulse tube refrigerating machine cool end heat exchanger ring flange is 0.2～0.3 millimeter; The material of described liquid helium groove is red copper or high-purity oxygen-free copper; Described pulse tube refrigerating machine is orifice pulse tube cooler or bidirection air intake type pulse tube refrigerating machine; Described pulse tube refrigerating machine is single-stage pulse tube refrigerating machine or multi-stage pulse tube refrigeration machine, and each pulse tube refrigerating machine cold junction simultaneously or be not provided with the liquid helium groove simultaneously; The volume of described liquid helium groove is to be attached thereto 1/4～1/2 of logical pulse tube volume.
The utility model advantage is:
The device of the regulating impulse pipe refrigeration machine cold junction air-flow phase place that the utility model provides, cold junction at existing pulse tube refrigerating machine is installed the liquid helium groove, from the refrigeration machine hot junction (as compressor high pressure gas pipeline, low pressure gas pipeline or regenerator hot junction), adopt a thin-wall stainless steel to connect, introduce one micro-air-flow to the liquid helium groove of this cold junction, the precooling that this trace air communication is crossed the regenerator tube wall enters in the liquid helium groove; Part trace air communication extra pulse pipe cold junction in the liquid helium groove and the pressure reduction in the liquid helium groove enter the cold junction of pulse tube refrigerating machine, with the working medium stream pressure of regulating impulse pipe cold junction and the phase place between the flow, improve the refrigerating capacity of refrigeration machine; The pulse tube hot junction is directly introduced one micro-air-flow by the precooling of tube wall to the liquid helium groove of pulse tube cold junction, do not introducing any mechanical moving element, keep under the situation of pulse tube refrigerating machine inherent characteristics, the phase place of regulating impulse pipe cold junction air-flow, simple in structure, reliability and refrigerating efficiency are all higher.
Further describe the utility model below in conjunction with drawings and Examples:
Accompanying drawing 1 is a structural representation of the present utility model;
The schematic diagram that accompanying drawing 2 is connected with pulse tube for the liquid helium groove;
Wherein: helium compressor 1 rotary valve 2 thin-wall stainless steels 3
Aperture 13,14 bidirection air intakes 15,16 air reservoirs 17,18
As seen from the figure, the device of the regulating impulse pipe refrigeration machine cold junction air-flow phase place that the utility model provides, it is characterized in that, at the pulse tube refrigerating machine cold junction liquid helium groove 7 is set, liquid helium groove 7 is communicated with the hot junction of pulse tube refrigerating machines by thin-wall stainless steel 3, and is connected with pulse tube 9 by micropore 10 on pulse tube refrigerating machine cool end heat exchanger 8 ring flanges; Described thin-wall stainless steel 3 is wrapped on the tube wall of regenerator 4,5 of pulse tube refrigerating machine; The diameter of the micropore 10 on the ring flange of described pulse tube refrigerating machine cool end heat exchanger 8 is 0.2～0.3 millimeter; The material of described liquid helium groove 7 is red copper or high-purity oxygen-free copper; Described pulse tube refrigerating machine can be orifice pulse tube cooler or bidirection air intake type pulse tube refrigerating machine; Described pulse tube refrigerating machine can be single-stage or multi-stage pulse tube refrigeration machine, and each grade pulse tube refrigerating machine cold junction simultaneously or be not provided with liquid helium groove 7 simultaneously.
Embodiment shown in Figure 1 is the pulse tube refrigerating machine of secondary liquid helium warm area, adopt the helium compressor of GM type, high-purity helium in the helium compressor 1 links to each other with rotary valve 2 by the pipeline of outlet, forms compressor gas supplied system, provides the high-low pressure helium to pulse tube refrigerating machine; The cold junction of each grade pulse tube refrigerating machine is all installed a liquid helium groove 7, pulse tube refrigerating machine cool end heat exchanger 8 is one and makes ring flange with red copper, and coupled liquid helium groove 7 is 1/4～1/2 the column type volume that a volume of making of red copper is about pulse tube 9 volumes; Internal diameter is that 2 millimeters thin-wall stainless steel 3 links to each other this liquid helium groove 7 (shown in the figure with the refrigeration machine hot junction, link to each other with the hot junction of pulse tube refrigerating machine regenerator 4, also can be connected with helium compressor high pressure gas pipeline or low pressure gas pipeline, effect is identical), liquid helium groove 7 to pulse tube 9 cold junctions is introduced one micro-air-flow, the tube wall precooling that this trace air communication is crossed regenerator 4 and 5 enters in the liquid helium groove 7, for obtaining good thermo-contact, thin-wall stainless steel 3 can be centered around on the tube wall of regenerator 4 and 5; It is 0.2～0.3 millimeter micropore 10 (seeing also Fig. 2) that a diameter is arranged on the ring flange of cool end heat exchanger 8, because the Working medium gas of pulse tube 9 inside is done cyclic fluctuation with compressor 1 intake and exhaust pressure in one-period, and in the liquid helium groove 7 from there being a pressure differential between the gas in refrigeration machine hot junction, so the trace of the part in the liquid helium groove 7 air communication are crossed the cold junction that micropore 10 on cool end heat exchanger 8 ring flanges enters pulse tube 9, thereby be able to the working medium stream pressure of regulating impulse pipe cold junction and the phase place between the flow, improve the refrigerating capacity of pulse tube refrigerating machine.
For improving the refrigerating capacity of this secondary liquid helium warm area pulse tube refrigerating machine first order, a liquid helium groove 7 can be installed below the cool end heat exchanger 8 of first order pulse tube 9, the volume of liquid helium groove 7 is about 1/4～1/2 of first order pulse tube 9 volumes, adopt a thin-wall stainless steel 3 that this liquid helium groove 7 is linked to each other with the refrigeration machine hot junction, in liquid helium groove 7, introduce one micro-air-flow, with the stream pressure of adjusting first order pulse tube cold junction and the phase place between the flow, improve the refrigerating capacity of first order pulse tube;
Give conventional hot junction phase-shifter among Fig. 1, comprise aperture 13,14, bidirection air intake 15,16 and air reservoir 17,18.They can and the utility model in liquid helium groove 7 common regulating impulse pipe internal working medium stream pressures and the phase place between the flow, improve the refrigerating capacity of refrigeration machine.
The schematic diagram that Fig. 2 is connected with pulse tube 9 for liquid helium groove 7 in the utility model; Pulse tube 9 is to make of conventional thin-wall stainless steel, cool end heat exchanger 8 is circular flange dishes of making of red copper, it is 0.2～0.3 millimeter small circular hole 10 that there is a diameter at this ring flange center, this micropore 10 makes the minimum gas in the liquid helium groove 7 that is installed in cool end heat exchanger 8 belows be connected with the Working medium gas of pulse tube 9, liquid helium groove 7 is that a volume of making of red copper is about 1/4～1/2 the cylindrical container that is attached thereto logical pulse tube 9 volumes, internal diameter is that 2 millimeters thin-wall stainless steel 3 links to each other this liquid helium groove 7 with the hot junction of refrigeration machine, thereby introduces one micro-air-flows to liquid helium groove 7.
Claims (7)
1. the device of a regulating impulse pipe refrigeration machine cold junction air-flow phase place, it is characterized in that, at the pulse tube refrigerating machine cold junction liquid helium groove is set, the liquid helium groove is communicated with the hot junction of pulse tube refrigerating machine by thin-wall stainless steel, and is connected with pulse tube by the micropore on the pulse tube refrigerating machine cool end heat exchanger ring flange.
2. press the device of claims 1 described regulating impulse pipe refrigeration machine cold junction air-flow phase place, it is characterized in that described thin-wall stainless steel is wrapped on the regenerator tube wall of pulse tube refrigerating machine.
3. press the device of claims 1 described regulating impulse pipe refrigeration machine cold junction air-flow phase place, it is characterized in that the micro-pore diameter on the described pulse tube refrigerating machine cool end heat exchanger ring flange is 0.2～0.3 millimeter.
4. press the device of claims 1 described regulating impulse pipe refrigeration machine cold junction air-flow phase place, it is characterized in that the material of described liquid helium groove is red copper or high-purity oxygen-free copper.
5. press the device of claims 1 described regulating impulse pipe refrigeration machine cold junction air-flow phase place, it is characterized in that, described pulse tube refrigerating machine is orifice pulse tube cooler or bidirection air intake type pulse tube refrigerating machine.
6. press the device of claims 1 described regulating impulse pipe refrigeration machine cold junction air-flow phase place, it is characterized in that, described pulse tube refrigerating machine is single-stage pulse tube refrigerating machine or multi-stage pulse tube refrigeration machine, and each grade pulse tube refrigerating machine cold junction simultaneously or be not provided with the liquid helium groove simultaneously.
7. press the device of claims 1 described regulating impulse pipe refrigeration machine cold junction air-flow phase place, it is characterized in that the volume of described liquid helium groove is to be attached thereto 1/4～1/2 of logical pulse tube volume.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN01203696U CN2465122Y (en) | 2001-02-27 | 2001-02-27 | Device for adjusting cold end air flow phase of pulse tube refrigerator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN01203696U CN2465122Y (en) | 2001-02-27 | 2001-02-27 | Device for adjusting cold end air flow phase of pulse tube refrigerator |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2465122Y true CN2465122Y (en) | 2001-12-12 |
Family
ID=33625095
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN01203696U Expired - Fee Related CN2465122Y (en) | 2001-02-27 | 2001-02-27 | Device for adjusting cold end air flow phase of pulse tube refrigerator |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2465122Y (en) |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1321303C (en) * | 2005-05-17 | 2007-06-13 | 中国科学院理化技术研究所 | Pressure wave generating system of oil-lubricated stable-flow compressor refrigerator |
| CN102032703A (en) * | 2010-11-26 | 2011-04-27 | 中国科学院上海技术物理研究所 | Integrated hot end phase adjusting structure of inertance-tube type pulse tube cooler and manufacturing method of phase adjusting structure |
| CN102331105A (en) * | 2011-09-23 | 2012-01-25 | 浙江大学 | Pulse tube refrigerator with precooling pulse tube |
| CN102563993A (en) * | 2012-01-13 | 2012-07-11 | 中国科学院物理研究所 | Absorption type low-temperature thermal switch with normal-pressure sealed helium |
| CN104654648A (en) * | 2013-11-22 | 2015-05-27 | 同济大学 | Multistage Stirling type pulse tube refrigerator |
| CN106092536A (en) * | 2016-06-13 | 2016-11-09 | 中国科学院理化技术研究所 | Alternating flow resistance loss testing device |
| CN110058184A (en) * | 2018-01-19 | 2019-07-26 | 北京绪水互联科技有限公司 | Cold head efficiency calculation index and method, the system that cold head efficiency calculation and monitoring are realized using the index |
| CN113324345A (en) * | 2021-06-18 | 2021-08-31 | 中国科学院兰州化学物理研究所 | 1.5K ultralow temperature implementation system and method of liquid helium-free low-temperature system |
-
2001
- 2001-02-27 CN CN01203696U patent/CN2465122Y/en not_active Expired - Fee Related
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1321303C (en) * | 2005-05-17 | 2007-06-13 | 中国科学院理化技术研究所 | Pressure wave generating system of oil-lubricated stable-flow compressor refrigerator |
| CN102032703A (en) * | 2010-11-26 | 2011-04-27 | 中国科学院上海技术物理研究所 | Integrated hot end phase adjusting structure of inertance-tube type pulse tube cooler and manufacturing method of phase adjusting structure |
| CN102032703B (en) * | 2010-11-26 | 2012-06-27 | 中国科学院上海技术物理研究所 | Integrated hot end phase adjusting structure of inertance-tube type pulse tube cooler and manufacturing method of phase adjusting structure |
| CN102331105A (en) * | 2011-09-23 | 2012-01-25 | 浙江大学 | Pulse tube refrigerator with precooling pulse tube |
| CN102563993A (en) * | 2012-01-13 | 2012-07-11 | 中国科学院物理研究所 | Absorption type low-temperature thermal switch with normal-pressure sealed helium |
| CN104654648A (en) * | 2013-11-22 | 2015-05-27 | 同济大学 | Multistage Stirling type pulse tube refrigerator |
| CN104654648B (en) * | 2013-11-22 | 2017-04-05 | 同济大学 | A kind of multi-stage stirling type vascular refrigerator |
| CN106092536A (en) * | 2016-06-13 | 2016-11-09 | 中国科学院理化技术研究所 | Alternating flow resistance loss testing device |
| CN110058184A (en) * | 2018-01-19 | 2019-07-26 | 北京绪水互联科技有限公司 | Cold head efficiency calculation index and method, the system that cold head efficiency calculation and monitoring are realized using the index |
| CN113740789A (en) * | 2018-01-19 | 2021-12-03 | 北京绪水互联科技有限公司 | Cold head efficiency calculation index, method for quantitatively describing cold head efficiency and cold head efficiency monitoring method |
| CN113740789B (en) * | 2018-01-19 | 2023-09-19 | 北京绪水互联科技有限公司 | Method for quantitatively describing cold head efficiency |
| CN113324345A (en) * | 2021-06-18 | 2021-08-31 | 中国科学院兰州化学物理研究所 | 1.5K ultralow temperature implementation system and method of liquid helium-free low-temperature system |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |