CN103175328A - High-frequency pulse tube refrigerating machine - Google Patents
High-frequency pulse tube refrigerating machine Download PDFInfo
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- CN103175328A CN103175328A CN2011104392376A CN201110439237A CN103175328A CN 103175328 A CN103175328 A CN 103175328A CN 2011104392376 A CN2011104392376 A CN 2011104392376A CN 201110439237 A CN201110439237 A CN 201110439237A CN 103175328 A CN103175328 A CN 103175328A
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Abstract
The invention provides a high-frequency pulse tube refrigerating machine which comprises a linear compressor (1), a connecting pipe (2), a heat regenerator hot end heat exchanger (3), a heat regenerator (4), a cold end heat exchanger (5), a pulse tube (6), a hot end heat exchanger (7), an inertia pipe (8), and a tubular air reservoir (11), wherein the linear compressor (1), the connecting pipe (2), the heat regenerator hot end heat exchanger (3), the heat regenerator (4), the cold end heat exchanger (5), the pulse tube (6), the hot end heat exchanger (7), the inertia pipe (8), and the tubular air reservoir (11) are connected in sequence. The tubular air reservoir adopts a pipe with the diameter ranging from 8 to 20 millimeters as an air reservoir, one end of the tubular air reservoir is connected with the inertia pipe, and the other end of the tubular air reservoir is closed. Compared with an ordinary air reservoir, the tubular air reservoir is greatly reduced in weight and size. The tubular air reservoir can play a role of the ordinary air reservoir on one hand, and can use the inertia effect of air in the pipe to adjust the phase in the inertia pipe to further improve the performance of the refrigerating machine on the other hand. At the same time, the adoption of the tubular air reservoir enables the structure of the high-frequency pulse tube refrigerating machine to be compact, and is beneficial for the practicability and application in space.
Description
Technical field
The present invention relates to small-sized Cryo Refrigerator field, relate in particular to high frequency pulse tube cooler.
Background technology
Along with the development of space technology, the research small-sized, micro low temperature refrigerator that is used for cooled infrared detector and high-temperature superconductive device has caused various countries scholars' very big interest.High frequency pulse tube cooler is a kind of as small-sized Cryo Refrigerator, due to the advantage such as it has the cold junction movement-less part, simple in structure, reliability is high and anti-electromagnetic interference is good, is expected to replace the application of conventional chiller in information, superconduction and space field.
The development experience of pulse tube refrigerating machine basic model, pinhole type, bidirection air intake type, multi-channel shunt type and inertia cast.The basic model pulse tube refrigerating machine is the initial form of high frequency pulse tube cooler.It utilizes the pipe of a hollow, when having the pressure wave of alternation in it, the blind end heating, axially form the phenomenon of very large thermograde along pipe, loading onto regenerator, after arranging the laminarization element, pipe blind end (hot junction) is cooled to room temperature, just can obtains refrigeration effect at the pipe port of export (cold junction) that leads to compressor.Be not similar to the phase modulating mechanism of stirling-type refrigeration machine displacer due to the basic model pulse tube refrigerating machine, make the cycle variation of gas parameter in pulse tube can not obtain suitable phase place, this defective has hindered the development of pulse tube refrigerating machine.
The invention of the phase modulating mechanisms such as aperture, bidirection air intake system, inertia tube makes pulse tube refrigerating machine have corresponding phase modulating mechanism.The application of these phase modulating mechanisms has improved the phase relation of pulse tube refrigerating machine inside, has improved the performance of pulse tube cooler.Yet, in these mechanisms, all require system to exist a volume to be about pulse tube volume 5-10 common air reservoir doubly.This kind air reservoir generally is made into the short and thick shape such as cylindrical or annular, its diameter is generally several centimetres even tens centimetres, the air reservoir of this shape has certain requirement to material structure intensity and thickness, thereby has a huge volume and weight, greatly increase physical dimension and the weight of whole system, restricted to a certain extent the application of pulse tube refrigerating machine.And the existence of common air reservoir under some low temperature environment, has seriously hindered the layout of Cryo Refrigerator.
In inertia cast pulse tube refrigerating machine field, Chinese patent CN2811865Y has proposed without air reservoir type pulse tube refrigerating machine, and this has cancelled air reservoir without air reservoir type pulse tube refrigerating machine, directly uses the inertia tube phase modulation.Find by practice, without the confidential refrigeration performance that is equal to the pulse tube refrigerating machine that the air reservoir type is arranged that reaches of air reservoir type pulse tube refrigeration, need to provide very long inertia tube.But long layout and the range of application that can affect equally pulse tube refrigerating machine of inertia tube.
For inertia cast high frequency pulse tube cooler, air reservoir and inertia tube are brought into play different effects separately generally as two relatively independent parts in system.Inertia tube is as the phase modulation function parts, utilize the inertia of internal gas can the regulating impulse pipe in the mass flow of gas and the phase difference between pressure wave, for the refrigeration working medium in pulse tube provides correct phase place.The diameter of inertia tube is more large more can provide larger phase difference, more favourable to improving the refrigeration machine performance, and diameter is crossed the pressure wave amplitude in conference loss pulse tube, reduces refrigerating efficiency.In order to make inertia tube have enough phase modulation abilities, avoid simultaneously a large amount of losses of pressure wave amplitude, usually it is designed to have the elongated tubular of certain diameter, internal diameter is generally less than 4 millimeters.
Air reservoir is as the important component part of phase modulating mechanism, usually as the gas storage cryopreservation device.The portion gas that wherein stores in the pulse tube refrigeration process because the promotion of Linearkompressor is travelled to and fro between between air reservoir and pulse tube, to increase the flow of refrigeration working medium gas in pulse tube.In addition, according to the phase modulation principle known to those skilled in the art, the boundary condition that air reservoir also must provide pressure oscillation to be almost equal to zero for pulse tube refrigerating machine.In other words, air reservoir keeps internal pressure all the time near system-wide average pressure, the impact of pressurized Reeb hardly.The volume of air reservoir is larger, and the boundary condition that provides is more approaching zero, and therefore desirable air reservoir volume is infinitely-great.But in fact air reservoir can not be infinity, is generally the 5-10 of pulse tube volume doubly.The diameter of cylindrical air reservoir can reach several centimetres even tens centimetres, wherein still can have faint pressure oscillation.In order to obtain higher levels of performance, it is conventionally believed that the volume of common air reservoir is the bigger the better.
Yet volume is too huge, the layout of the air reservoir difficulty that just becomes.Common air reservoir has occupied a large portion of refrigeration machine machine volume and quality, and huger air reservoir can limit the application of the type refrigeration machine, becomes the restraining factors of refrigeration machine miniaturization.
So, following inertia tube and air reservoir is well-separated, that Each performs its own functions thinking, people can be absorbed in the vicious circle that the performance that more improves refrigeration machine more makes refrigeration machine be difficult to arrange.
Summary of the invention
The technical problem to be solved in the present invention is to provide a kind of like this high frequency pulse tube cooler, and quality and the volume of its air reservoir greatly reduce, and are conducive to the layout of air reservoir and even whole refrigeration machine, does not reduce the refrigeration performance of refrigeration machine simultaneously.
Basic conception of the present invention is: break constructive accounting in the past, make air reservoir not only possess inventory of gas and the function of pressure oscillation close to zero boundary condition is provided, utilize on the contrary air reservoir interior with respect to pressure oscillation more a small amount of in pulse tube, allow air reservoir also bring into play a part of phase modulation effect.Method is the phase modulation principle with reference to inertia tube, and the tubulose air reservoir is provided in pulse tube cooler system, namely air reservoir make tubulose or directly with the larger pipe of diameter as air reservoir.So, the tubulose air reservoir has kept the effect of air reservoir inventory of gas, and simultaneously, the air reservoir of tubulose makes the pressure oscillation in air reservoir be almost equal to zero along vertically being decreased to gradually of pipe, so in the situation that cumulative volume reduces, still can provide suitable boundary condition for whole refrigeration system.In addition, utilize the inertia of gas in the tubulose air reservoir, regulate the phase place of gas in pulse tube cooler system under remaining pressure wave promotes, further improve the refrigeration performance of high frequency pulse tube cooler system.The tubulose air reservoir of this moment can be regarded the part of " inertia tube " and the zoarium of whole " air reservoir " in theory as.
The technical solution adopted in the present invention is to provide a kind of high frequency pulse tube cooler system, mainly comprise the Linearkompressor, tube connector, regenerator hot end heat exchanger, regenerator, cool end heat exchanger, pulse tube, hot end heat exchanger, inertia tube and the air reservoir that connect successively, wherein, the air reservoir of this high frequency pulse tube cooler is the tubulose air reservoir that is made out of tubes, this tubulose air reservoir one end and this inertia tube link together, other end sealing.
After adopting the tubulose air reservoir, in air reservoir, the mobile meeting of gas is concentrated and is occurred in air reservoir near an end place of inertia tube.In entering the process of inertia tube, due to the unexpected variation in circulation passage cross section, air-flow can rub in the junction of tubulose air reservoir and inertia tube and the tube wall of sectional area sudden change, thereby causes certain gas flow loss, reduces refrigerating efficiency.For addressing this problem, system can also comprise the variable cross-section connector according to high frequency pulse tube cooler of the present invention, and the one end is identical with the inertia tube sectional area, and the other end is identical with the sectional area of tubulose air reservoir, tubulose air reservoir one end is connected with inertia tube by the variable cross-section connector, other end sealing.The variable cross-section connector makes gas during returning to the process of inertia tube from air reservoir, and the sudden change of circulation passage sectional area changes gradual change into, can reduce like this friction of gas and tubulose air reservoir and inertia tube junction, thereby reduces the gas flow loss.
Adopt the high frequency pulse tube cooler system with the tubulose air reservoir of the present invention, its quality and volume greatly reduce.The tubulose air reservoir is stored a part of gas on the one hand, and himself design feature also can so that be decreased to gradually close to zero along the Longitudinal Pressure Wave of pipe, play the effect the same with common air reservoir; On the other hand, due to gas Oscillating flow in the tubulose air reservoir, refrigeration machine can carry out phase modulation by the inertia of gas in the tubulose air reservoir, thereby makes air reservoir play certain phase modulation effect.The basic change of tubulose air reservoir effect, making it no longer need to increase volume reduces to be delivered to pressure wave in the tubulose air reservoir via inertia tube, even so air reservoir small volume, when only having 8 millimeters such as the diameter of air reservoir pipe, also can not affect the refrigeration performance of refrigerator system, this size is generally compared greatly greater than 20 millimeters diameters less than 200 millimeters with existing cylindrical common air reservoir and is reduced.In addition, the phase modulating mechanism that adds common air reservoir with inertia tube is compared with pure inertia tube phase modulating mechanism, can provide more effective phase modulation with the phase modulating mechanism of tubulose air reservoir, the phase difference in more can the regulating impulse pipe, reduce the lowest refrigerating temperature of refrigeration machine, improve refrigerating capacity.Thereby not only the less tubulose air reservoir of volume do not reduce the performance of refrigeration machine, and the performance of refrigeration machine is got a promotion.And because air reservoir has certain phase modulation function, under the condition that does not reduce the refrigeration machine performance, this kind structure also helps the length that reduces inertia tube.
In addition, the architectural feature of tubulose air reservoir is more convenient for arranging, for example can be wrapped on compressor, further makes system architecture compact, more is conducive to the layout of high frequency pulse tube cooler.
Description of drawings
Below, describe the present invention in detail by embodiment by reference to the accompanying drawings, wherein:
Fig. 1 shows the structural representation with high frequency pulse tube cooler of common air reservoir of the prior art;
Fig. 2 shows the structural representation according to an embodiment of high frequency pulse tube cooler of the present invention;
Fig. 3 shows the structural representation according to another embodiment of high frequency pulse tube cooler of the present invention;
Fig. 4 uses equal length but during the different tubulose air reservoir of diameter, and the phase angle in high-frequency impulse control cooling system of the present invention hot junction is with the chart of change of frequency;
Fig. 5 is in the situation that the pipe total length of tubulose air reservoir is constant, tubulose air reservoir internal diameter and phase difference concern chart;
Fig. 6 is that the bore of tubulose air reservoir concerns chart between its length and pressure wave amplitude when being 8 millimeters.
The Reference numeral list
The 1-Linearkompressor; The 2-tube connector; 3-regenerator hot end heat exchanger; 4-regenerator 5-cool end heat exchanger; The 6-pulse tube; The 7-hot end heat exchanger; The 8-inertia tube; The common air reservoir of 9-; 10-variable cross-section connector; 11-tubulose air reservoir.
The specific embodiment
Hereinafter with reference to accompanying drawing, embodiments of the invention are described in detail.
Fig. 1 shows the pulse tube cooler system of the common air reservoir of available technology adopting.In this pulse tube cooler, the working medium of the Oscillating flow that is produced by the Linearkompressor pulsed pressure wave enters in regenerator hot end heat exchanger 3 by tube connector 2, with enter in regenerator 4 after the heat exchange of regenerator hot end heat exchanger, enter in pulse tube 6 after absorbing the cold in regenerator, and the Repeated Compression expansion produces the temperature difference between pulse tube cold junction and hot junction in pulse tube 6.The heat exchange in hot end heat exchanger 7 and the external world is cooled to the hot junction near room temperature, and the cold junction of pulse tube has the temperature lower than room temperature at this moment, and cool end heat exchanger 5 is brought into play refrigeration with object heat exchange to be cooled.The effect of inertia tube 8 and air reservoir 9 is to provide suitable phase place for pulse tube refrigerating machine.
Fig. 2 shows an embodiment according to high frequency pulse tube cooler of the present invention system.This refrigerator system comprises Linearkompressor 1, tube connector 2, regenerator hot end heat exchanger 3, regenerator 4, cool end heat exchanger 5, pulse tube 6, hot end heat exchanger 7, the inertia tube 8 that connects successively and adopts pipe as the tubulose air reservoir 11 of air reservoir, one end of tubulose air reservoir 11 is connected with inertia tube, an end sealing.
Term in the present invention " tubulose air reservoir " refer to air reservoir make tubulose or directly with the large pipe of diameter as air reservoir, perhaps select the pipe of larger diameter according to the diameter of pulse tube.The internal diameter of tubulose air reservoir is generally 8～20 millimeters.The length of tubulose air reservoir changes according to the difference of pulse frequency, Working medium gas, operating temperature, for example, is 60Hz in frequency, and under the room temperature condition of helium as working medium, the length of tubulose air reservoir can be 6 meters.The tubulose air reservoir can adopt metal tube, and for example copper pipe or stainless steel tube, also can adopt non-metallic pipe, for example nylon tube.
Preferably, the pipe of tubulose air reservoir can be helix tube.Helix tube takes up room less, air reservoir is arranged more compact.
According to a preferred embodiment of high-frequency impulse refrigeration machine of the present invention, refrigerator system comprises variable cross-section connector 10 in addition, one end connecting tubular air reservoir, and the other end connects inertia tube.The inside of this variable cross-section connector 10 is a gradual change cross section, and the sectional area of one end is identical with the inertia tube sectional area, and the sectional area of the other end is identical with the sectional area of tubulose air reservoir.The outer surface of this variable cross-section connector 10 is a continuous taper surface.Interchangeable, the outer surface of this variable cross-section connector 10 can be also continuous curved surface, for example arc.One end of tubulose air reservoir 11 is connected with inertia tube by variable cross-section connector 10, other end sealing.Because the inertia tube internal diameter is generally less than 4 millimeters, less than the internal diameter of air reservoir pipe, if directly inertia tube 8 is connected connection with the tubulose air reservoir, can produce the loss of certain gas flow, the refrigeration machine performance is caused to a certain extent impact.And in the present embodiment, tubulose air reservoir 11 further improves refrigeration performance by avoiding variable cross-section connector 10 and being connected of inertia tube the gas flow loss.
Fig. 3 shows another embodiment of medium-high frequency pulse tube refrigerating machine of the present invention.Different from high frequency pulse tube cooler shown in Figure 2 is, this pulse tube refrigerating machine is arranged to coaxial configuration, and the tubulose air reservoir is wrapped on compressor.Replacedly, the tubulose air reservoir can be wrapped on compressor together with inertia tube.In addition, because Linearkompressor is generally interposed structure, inertia tube and tubulose air reservoir both can be wrapped in one side (as Fig. 3) to interposed structure also can be wrapped in both sides (not shown) to interposed structure to keep equilibrium of forces.According to this layout of the present embodiment to the tubulose air reservoir, saving to a greater extent the space, make the layout of whole high-frequency impulse refrigeration machine compacter.
As can be seen from Figure 4, adopt the identical pipe of length as air reservoir, its phase angle changes along with the internal diameter of tubulose air reservoir is different with the excursion of frequency.The pipe that diameter is large can provide larger phase difference, and namely near inertia tube porch (hot end heat exchanger 7), the angle of the leading mass flow of pressure wave is larger.Those of ordinary skill in the art knows, the leading mass flow phase angle, phase angle of inertia tube porch pressure wave is larger, and the refrigeration machine performance improvement is more obvious.Therefore can come as required the excursion at control phase angle by the diameter of controlling the tubulose air reservoir.
Due to gas Oscillating flow in the tubulose air reservoir, tubulose air reservoir of the present invention can also utilize the effect of inertia of gas to carry out phase modulation, further increases the phase difference between pressure wave and mass flow, thereby makes air reservoir play certain phase modulation effect.Therefore tubulose air reservoir provided by the invention has played the effect of air reservoir on the one hand, played on the other hand the effect of inertia tube phase modulation, help to improve the performance of refrigeration machine.In addition, because the tubulose air reservoir has enough length, the pressure oscillation of inertia tube transmission vertically reduces gradually along the air reservoir pipe, finally can obtain pressure wave and be decreased to the boundary condition of being almost equal to zero.This for air reservoir near the method that the pressure wave of arrival end utilizes, make to be no longer necessary for to reduce to the full extent the air reservoir pressure fluctuating in inner and increase the air reservoir volume volume of tubulose air reservoir thereby can greatly reduce by relatively common air reservoir.Adopt the air reservoir of this kind small volume also can not lose the refrigeration performance of refrigerator system, reach thus purpose of the present invention.
In another embodiment of the present invention, the tubulose air reservoir can be formed by the pipe that straightens the footpath, for example adopts change diameter tube that diameter increases successively as air reservoir.For example, wherein the diameter range of first paragraph pipe is 5～10 millimeters, and the diameter range of the pipe of second segment is 10～12 millimeters.The tubulose air reservoir length that straightens the pipe formation in footpath is smaller than the tubulose air reservoir length that isodiametric pipe forms.For example, be 60Hz in frequency, under the room temperature condition of helium as working medium, the tubulose air reservoir is formed by the pipe that straightens the footpath, and its total length is less than 6 meters.
As shown in Figure 5, the total length of pipe is constant, and perseverance is 8 meters, and the pressure wave amplitude is 0.8bar.Again under condition, when the tubulose air reservoir was made of the isodiametric pipe of 10 millimeters internal diameters, the minimum phase difference of pressure wave and mass flow was-69 °; When the tubulose air reservoir was made of the pipe that straightens the footpath with 10 millimeters of 8 millimeters of internal diameters and internal diameters, this moment, the minimum phase difference of pressure wave and mass flow was-72 °.The data of analyzing in this figure can be reached a conclusion: the tubulose air reservoir that straightens the footpath has increased the phase difference of chiller heat side pressure Reeb and mass flow.
As shown in Figure 6, the phase difference that keeps pressure wave and mass flow be-40 ° constant, pulse frequency is 40Hz, in straightening the tubulose air reservoir in footpath, the length that is the pipe of 8 millimeters along with internal diameter constantly increases, the pressure wave amplitude first increases and then decreases that the tubulose air reservoir is interior.
Therefore, as shown in Figure 5 and Figure 6, the tubulose air reservoir that straightens the footpath can be regulated the interior pressure wave amplitude of air reservoir, can also increase phase difference, makes pressure wave amplitude and phase difference transfer to simultaneously optimum, improves the performance of refrigeration machine.
Be understandable that, the pulse tube refrigerating machine here can be not only linear pattern, can be also coaxial type, any one layout such as U-shaped, and be not limited only to this.And pulse tube refrigerating machine can be for single-stage, can for multistage, can be also also that any one is with the refrigeration machine type of air reservoir.
According to high frequency pulse tube cooler of the present invention system, can adopt the combination of one or more refrigeration working mediums well known in the art, preferably adopt nontoxic pollution-free and non-flammable gas, as helium 3, helium 4, hydrogen, nitrogen or its mist.
Although this paper has narrated the specific embodiment of the present invention, should be realized that, this specific embodiment is only description of this invention explanation, does not limit content of the present invention.Those skilled in the art under the prerequisite that does not depart from spirit of the present invention and purport to any change of the above specific embodiment or change all in the protection domain that claim of the present invention is advocated.
Claims (10)
1. high frequency pulse tube cooler, mainly comprise the Linearkompressor (1), tube connector (2), regenerator hot end heat exchanger (3), regenerator (4), cool end heat exchanger (5), pulse tube (6), hot end heat exchanger (7) and the inertia tube (8) that connect successively, it is characterized in that, this high frequency pulse tube cooler system also comprises tubulose air reservoir (11), it is that the pipe of 8 to 20 millimeters is as air reservoir that described tubulose air reservoir (11) adopts diameter, one end of described tubulose air reservoir is connected with inertia tube, other end sealing.
2. high frequency pulse tube cooler according to claim 1, it is characterized in that, described high frequency pulse tube cooler system also comprises be used to the variable cross-section connector (10) that connects described tubulose air reservoir and inertia tube, its towards the cross section of described inertia tube one side less than the cross section towards described tubulose air reservoir one side.
3. high frequency pulse tube cooler according to claim 1 and 2, is characterized in that, described tubulose air reservoir is wrapped on described compressor, and perhaps the tubulose air reservoir is wrapped on described compressor together with inertia tube.
4. high frequency pulse tube cooler according to claim 1 and 2, is characterized in that, described tubulose air reservoir is made by the pipe that straightens the footpath.
5. high frequency pulse tube cooler according to claim 4, is characterized in that, the internal diameter of described tubulose air reservoir first paragraph is 8 millimeters, and the internal diameter of second segment is 10 millimeters.
6. high frequency pulse tube cooler according to claim 1, is characterized in that, described tubulose air reservoir is made by steel pipe, stainless steel tube or nylon tube.
7. high frequency pulse tube cooler according to claim 1 and 2, is characterized in that, described high frequency pulse tube cooler is linear pattern single-stage high frequency pulse tube cooler.
8. high frequency pulse tube cooler according to claim 1 and 2, is characterized in that, described high frequency pulse tube cooler is coaxial type or U-shaped.
9. high frequency pulse tube cooler according to claim 1 and 2, is characterized in that, described high frequency pulse tube cooler is multistage high frequency pulse tube cooler.
10. high frequency pulse tube cooler according to claim 1 and 2, is characterized in that, the refrigeration working medium that adopts is two or more mist in helium 3, helium 4, hydrogen, nitrogen or this four kinds of gases.
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| CN103196255A (en) * | 2013-03-26 | 2013-07-10 | 中国科学院上海技术物理研究所 | Streamline air inlet structure for coaxial pulse tube refrigerator and method for manufacturing streamline air inlet structure |
| CN103851822A (en) * | 2014-01-17 | 2014-06-11 | 中国科学院上海技术物理研究所 | Refrigerating machine for compactly coupled inertia tube type linear pulse tube and manufacturing method |
| CN103851819A (en) * | 2014-01-17 | 2014-06-11 | 中国科学院上海技术物理研究所 | Structure for driving linear and U-shaped pulse pipe cold fingers by single linear compressor and manufacturing method of structure |
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| CN105066500A (en) * | 2015-09-22 | 2015-11-18 | 中国科学院理化技术研究所 | Thermally driven pulse tube refrigerator system |
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| CN103196255B (en) * | 2013-03-26 | 2015-05-13 | 中国科学院上海技术物理研究所 | Streamline air inlet structure for coaxial pulse tube refrigerator and method for manufacturing streamline air inlet structure |
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| CN103851819B (en) * | 2014-01-17 | 2016-03-30 | 中国科学院上海技术物理研究所 | Separate unit linear compressor drives straight line and U-shaped vascular coldfinger and manufacture method |
| CN103851819A (en) * | 2014-01-17 | 2014-06-11 | 中国科学院上海技术物理研究所 | Structure for driving linear and U-shaped pulse pipe cold fingers by single linear compressor and manufacturing method of structure |
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| CN103851822A (en) * | 2014-01-17 | 2014-06-11 | 中国科学院上海技术物理研究所 | Refrigerating machine for compactly coupled inertia tube type linear pulse tube and manufacturing method |
| CN103968592A (en) * | 2014-04-08 | 2014-08-06 | 浙江大学 | Pulse tube refrigerator using corrugated pipe as adjustable air reservoir |
| CN103968592B (en) * | 2014-04-08 | 2016-03-09 | 浙江大学 | A kind of bellows that utilizes is as the vascular refrigerator of adjustable air reservoir |
| CN105066500A (en) * | 2015-09-22 | 2015-11-18 | 中国科学院理化技术研究所 | Thermally driven pulse tube refrigerator system |
| CN105066500B (en) * | 2015-09-22 | 2017-10-31 | 中国科学院理化技术研究所 | A kind of thermal drivers pulse tube cooler system |
| CN108562450A (en) * | 2018-04-17 | 2018-09-21 | 中国科学院理化技术研究所 | A kind of regenerator drag characteristic test device under the conditions of profound hypothermia |
| CN109059359A (en) * | 2018-08-08 | 2018-12-21 | 珠海凌达压缩机有限公司 | A kind of compressor and compressor refrigeration system |
| CN109059359B (en) * | 2018-08-08 | 2024-04-05 | 珠海凌达压缩机有限公司 | Compressor and compressor refrigerating system |
| CN111879027A (en) * | 2020-07-28 | 2020-11-03 | 上海理工大学 | Flexible pulse tube refrigerator |
| CN114739040A (en) * | 2022-03-11 | 2022-07-12 | 上海铂钺制冷科技有限公司 | Pulse tube refrigerator for realizing active phase modulation by adopting single compressor |
| CN114739040B (en) * | 2022-03-11 | 2023-12-01 | 上海铂钺制冷科技有限公司 | Pulse tube refrigerator for realizing active phase modulation by adopting single compressor |
| CN114877555A (en) * | 2022-05-07 | 2022-08-09 | 中国科学院理化技术研究所 | Overflow helium refrigerator with impeller mechanical inlet temperature-exchanging pipeline |
| CN116772445A (en) * | 2023-08-18 | 2023-09-19 | 苏州华冷科技有限公司 | Ejector structure for free piston Stirling refrigerator |
| CN116772445B (en) * | 2023-08-18 | 2023-11-03 | 苏州华冷科技有限公司 | Ejector structure for free piston Stirling refrigerator |
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