CN104764238A - Oil-free low-vibration GM type pulse tube refrigerator - Google Patents
Oil-free low-vibration GM type pulse tube refrigerator Download PDFInfo
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- CN104764238A CN104764238A CN201510193420.0A CN201510193420A CN104764238A CN 104764238 A CN104764238 A CN 104764238A CN 201510193420 A CN201510193420 A CN 201510193420A CN 104764238 A CN104764238 A CN 104764238A
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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
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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
- F25B2309/00—Gas cycle refrigeration machines
- F25B2309/14—Compression machines, plants or systems characterised by the cycle used
- F25B2309/1421—Pulse-tube cycles characterised by details not otherwise provided for
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Abstract
The invention discloses an oil-free low-vibration GM type pulse tube refrigerator which comprises a GM type compression device and a refrigeration assembly. The GM type compression device can be an adsorption compressor set or a floating scroll compressor set. The refrigeration assembly is a pulse tube refrigerator body. An adsorption compressor has almost no movement component, the service life is long, vibration is quite low, and high reliability is achieved. A floating scroll compressor commercialized at present does not need oil lubrication, energy efficiency is high, the structure is compact, and compared with a traditional oil lubrication helium compressor, the service life is not limited by the service life of an oil adsorber any more, vibration is small, and the space application requirement can be met. The oil-free low-vibration drive mode is used for the GM type pulse tube refrigerator, and all the problems existing in vibration and the service life of the GM type pulse tube refrigerator can be solved. Compared with a low-efficiency Stirling type pulse tube refrigerator, the oil-free low-vibration GM type pulse tube refrigerator has the large advantages in the field of deep hypothermia space refrigeration of temperature zones below 20 K.
Description
Technical field
The present invention relates to refrigeration technology field, specifically relate to a kind of without the low vibrations GM type vascular refrigerator of oil.
Background technology
(" low temperature " described herein, refers generally to below 120K warm area to have obtained the ripe low temperature applied.) refrigeration machine has sterlin refrigerator, GM refrigeration machine, vascular refrigerator and adopt the J-T j-t refrigerator of these philip refrigerator precoolings, these refrigeration machines all need at least one compressor as drive source, and the volume and weight of compressor bank accounts for more than 50% of refrigeration machine complete machine usually, for vascular refrigerator, compressor bank is unique part containing moving component in these refrigeration machines, therefore, the volume of compressor bank, weight, reliability also determine the characteristic of vascular refrigerator.
Vascular refrigerator can be divided into stirling-type and GM type two class according to the difference of drive source.The former adopts Linearkompressor to drive mostly, frequency is higher, generally at more than 10Hz, obtain the larger refrigerating capacity of unit volume with this, the requirement of space application can be reached at present, and the problem such as also cause regenerator heat exchange insufficient because frequency is higher, obtain at below 20K the cost paid needed for refrigerating capacity too large, limit its application in profound hypothermia district, although liquid helium region can be reached by three grades and above structure at present, but efficiency is extremely low, still apply without space temporarily.The latter now scroll compressor driving GM refrigeration machine that adopts drives more, and the direct current working medium that helium scroll compressor exports changed into the Oscillating flow working medium needed for GM type vascular refrigerator by high-low pressure control valve, and high-low pressure switching frequency is controlled in the scope of 1-3Hz, the ratio of high-low pressure is also larger.This makes helium working medium can abundant heat exchange in regenerator, and adiabatic expansion refrigeration is also more remarkable, and therefore the GM vascular refrigerator structure of two-stage can reach the cryogenic temperature of 2.2K, can obtain the refrigerating capacity of more than 1W at 4.2K.And this scroll compressor repacking that traditional GM type vascular refrigerator uses is from the screw compressor of domestic air conditioning, need oil lubrication, cause compressor bank to contain complicated return line and oily absorber etc., its volume and weight is multiplied; Meanwhile, the oily absorber replacement cycle is short, limits the service life of refrigeration machine complete machine.Therefore GM type vascular refrigerator is not considered for space item yet.
Along with the progress of science and technology, current have two kinds the Compressor Technology of meeting spatial application long life requirement can be used for the scroll compressor of alternative Traditional GM type vascular refrigerator: one is absorption type compressor; Two is the scroll compressor that floats.
Absorption type compressor maturation is applied to space refrigeration technology, but in refrigeration machine field, only in JT j-t refrigerator, obtains application at present.Such compressor except air inlet and exhaust valve group without any moving component, only rely on adsorbent working medium to be obtained under high temperature and low temperature to the effect of compression working medium respectively by physics or Chemical releases or absorption, substantially solve the loss and vibration problem that moving component brings.Requiring application scenario, high space to low vibrations, this is current unique adopted compressible drive mode;
The scroll compressor machine technology that floats adopts to move determines self-adding project organization between scrollwork, thus solve other project organizations because of product and normally run the wear problem caused, amount efficiency and volumetric efficiency can present in whole length of life and progressively improve until break-in state completely, full-oil-free lubrication can be accomplished at present, friction, maximal pressure ratio reaches more than 200:1, can meeting spatial efficient, compact and long-life requirement.Therefore floating scroll compressor machine technology is applied to Cryo Refrigerator, particularly space low-temperature refrigeration technology, its effect is obviously.
Replace traditional scroll compressor in these two kinds of compressible drive modes, the space of GM type vascular refrigerator must be made to apply becomes possibility, and application becomes a reality in the space of liquid helium region to make vascular refrigerator.
Summary of the invention
The invention provides without the low vibrations GM type vascular refrigerator of oil, this refrigeration machine adopts compressor without oily low vibration as the drive source of refrigeration machine, relieve the life-span restriction that Traditional GM type vascular refrigerator is caused by oily absorber, requirements such as efficient, compact and reliable (long-lives) can be applied by meeting spatial.
A kind of without the low vibrations GM type vascular refrigerator of oil, comprise cooling assembly and drive the compression unit of cooling assembly, described compression unit is the GM type compression set without oily low vibration; Described cooling assembly is pulse tube refrigeration assembly; The working medium Oscillating flow frequency that described GM type compression set produces in cooling assembly is within the scope of 1-3Hz.
As preferably, described GM type compression set is the absorption type compressor bank of single-stage or plural serial stage, and described absorption type compressor bank comprises multiple adsorption compression unit be arranged in parallel.
As preferably, described adsorption compression unit comprises:
One or more absorber be arranged in series;
Be located at the one-way exhaust valve on each absorber export pipeline;
Be located at the breather cheek valve on each absorber entrance pipe;
To the controlled heater block of absorber heating.
Comprise in GM type compression set simultaneously and control the controller of heater block according to setting cycle alternate run.
In technique scheme, each absorber is imported and exported and is equipped with check valve, in absorber, adsorbent is by the gas of absorption before physics or chemical reaction release, when forming certain high pressure in absorber chamber, outlet one-way exhaust valve because of produce front and back forward pressure reduction automatically open, and entrance breather cheek valve because of produce reverse differential pressure and remain closed; By physics or chemical reaction adsorbed gas in absorber, when forming low pressure in absorber chamber, entrance breather cheek valve is opened automatically because of the front and back forward pressure reduction produced, and exports one-way exhaust valve and remain closed because of the reverse differential pressure produced.Each adsorption compression unit, with definite sequence alternate run within each cycle, forms stable height pneumatic supply.This process makes working medium in cooling assembly cavity, produce the Oscillating flow of certain pressure reduction, thus obtains refrigerating capacity at cool end heat exchanger place.
For promoting pressure ratio, make refrigeration machine obtain better refrigeration performance, as preferably, described GM type compression set is the absorption type compressor bank of plural serial stage.When an adsorption compression unit comprises multiple absorber be arranged in series, each absorber outlet is provided with one-way exhaust valve, and each absorber entrance is provided with breather cheek valve.
For stablizing each adsorption compression unit intake and exhaust pressure, control the alternative frequency of air-flow in cooling assembly chamber more accurately, as preferably, pipeline between described adsorption compression unit and cooling assembly is established the high pressure control valve for controlling alternative frequency in cooling assembly and low-pressure control valve, and import and export to be provided with at adsorption compression unit and adsorption compression unit to be exported and the gas of input carries out the air reservoir of voltage stabilizing.During actual connection, the high-pressure mouth of adsorption compression unit is connected with high pressure control valve with high pressure air reservoir successively by pipeline, is finally connected with cooling assembly; The low pressure port of adsorption compression unit is connected with low-pressure control valve with low pressure air reservoir successively by pipeline, is finally connected with cooling assembly.
Adsorption compression machine does not almost vibrate, long service life, reliability is high, be mainly used in before this and drive JT j-t refrigerator, application scenario to low vibration and long-life require high, be introduced into for driving GM type vascular refrigerator, the vibration of GM type vascular refrigerator and life problems are all resolved, at below 20K warm area, relative to poor efficiency and with the stirling-type vascular refrigerator of moving component, have overwhelming advantage, the scope that vascular refrigerator is applied in space is expanded further.
As preferably, described GM type compression set comprises:
Float screw compressor;
Be located at high pressure air reservoir and the high pressure control valve of floating screw compressor export pipeline;
And be located at low pressure air reservoir and the low-pressure control valve of floating screw compressor entrance pipe.
In technique scheme, the high-pressure mouth of floating scroll compressor is communicated with high pressure control valve with high pressure air reservoir successively by pipeline, the low pressure port of floating scroll compressor is communicated with low-pressure control valve with low pressure air reservoir successively by pipeline, high pressure control valve and low-pressure control valve are when this system cloud gray model with certain frequency alternation switch, and effect is that the direct current working medium provided by floating screw compressor changed Oscillating flow working medium into before entering regenerator.
Described pulse tube refrigeration assembly is single-stage pulse tube refrigeration unit.Flow to according to working medium, described GM type compression set is imported and exported and is communicated with the regenerator of cooling assembly by pipeline, and regenerator is communicated with vascular by cool end heat exchanger, and vascular is communicated with phase modulating mechanism with vascular hot-side heat exchanger successively.
Described pulse tube refrigeration assembly is gas coupled mode multi-stage pulse tube refrigeration unit, or thermal coupling type multi-stage pulse tube refrigeration unit.
Float the device of scroll compressor without the need to oily absorber and return line, greatly simplify the structure of compressor bank, volume and weight is much smaller than the scroll compressor having oil lubrication, pressure working condition also can meet the demand of GM type vascular refrigerator easily, and the scroll compressor that floats is commercially produced, this be enable GM type vascular refrigerator easily meeting spatial application requirement, make vascular refrigerator at below 20K, particularly liquid helium region realizes its practical value.
For promoting vascular refrigerator performance further, its GM type compression set is in low temperature environment, by cryogenic liquid (liquid helium, liquid nitrogen or other working medium) or cryocooled; Here low temperature environment refers generally to the temperature of below 300K.
For obtaining lower cryogenic temperature, its refrigeration unit is gas coupled mode multi-stage pulse tube refrigeration machine, or thermal coupling type multi-stage pulse tube refrigeration machine;
For promoting the performance of vascular refrigerator further, phase modulating mechanism can be communicated with two the contrary check valves arranged in regenerator hot junction; For suppressing the DC-flow caused by real material and gas non-ideal behavior.
For solving the highly effective refrigeration problem of different warm area, cold-producing medium is the mixed working fluid of helium, nitrogen, hydrogen, neon and these gases.
Compared with prior art, beneficial effect of the present invention is embodied in:
The absorption type compressor that the present invention adopts almost does not have moving component, long service life, and vibrate extremely low, reliability is high; Current business-like floating scroll compressor, without the need to oil lubrication, efficiency is higher, compact conformation, and compared with the helium compressor lubricated with traditional oils, service life no longer by the restriction in oily absorber life-span, is vibrated less, can meeting spatial application requirement.The above-mentioned type of drive without oily low vibration is used for GM type vascular refrigerator can make the vibration of GM type vascular refrigerator and life problems all be resolved.In the profound hypothermia space refrigeration field of below 20K warm area, this GM type vascular refrigerator without oily low vibration has larger advantage relative to poor efficiency stirling-type vascular refrigerator.
Accompanying drawing explanation
Fig. 1 is the structural representation of the first embodiment without oil low vibrations GM type vascular refrigerator of the present invention.
Fig. 2 is the structural representation without oil low vibrations GM type vascular refrigerator the second embodiment of the present invention.
Fig. 3 is the structural representation without the third embodiment of oil low vibrations GM type vascular refrigerator of the present invention.
Fig. 4 is the structural representation without oil low vibrations GM type vascular refrigerator the 4th kind of embodiment of the present invention.
Fig. 5 is the structural representation without oil low vibrations GM type vascular refrigerator the 5th kind of embodiment of the present invention.
Wherein: 1:GM type compression set, 2: cooling assembly, 3: regenerator, 4: cool end heat exchanger, 5: vascular, 6: vascular hot-side heat exchanger, 7: phase modulating mechanism, 8: adsorption compression unit, 9: float scroll compressor, 10: low-pressure control valve, 11: high pressure control valve, 12: low pressure air reservoir, 13: high pressure air reservoir.
Detailed description of the invention
Embodiment 1
As shown in Figure 1, the low vibrations GM type vascular refrigerator of nothing oil, comprises GM type compression set 1 and cooling assembly 2, GM type compression set 1 is made up of primary adsorption compressor bank 8, and adsorption compression unit 8 is made up of some adsorption compression unit be arranged in parallel.Cooling assembly 2 comprises regenerator 3, cool end heat exchanger 4, vascular 5, vascular hot-side heat exchanger 6 and phase modulating mechanism 7.Each adsorption compression unit comprises: absorber; Be positioned at the one-way exhaust valve of absorber outlet and be positioned at the breather cheek valve of absorber entrance, one-way exhaust valve and breather cheek valve are all by pressure reduction automatic control of opening/closing; And the heater block heated absorber arranged as required is or/and the cooling-part that cools absorber, naturally cools, does not just need cooling device.Annexation between each parts is:
GM type compression set 1 is imported and exported and is communicated with the regenerator 3 of cooling assembly 2 by pipeline, and regenerator 3 is communicated with vascular 5 by cool end heat exchanger 4, and vascular 5 is communicated with phase modulating mechanism 7 with vascular hot-side heat exchanger 6 successively.
The refrigeration machine course of work is:
It is a cycle that single adsorption compression unit completes cooling, air-breathing, heating and exhaust Four processes, and this cycle is generally greater than the alternating cycles of gas in cooling assembly 2 cavity.Working fluid flow alternating cycles in cooling assembly 2 cavity is divided into high pressure half period and low pressure half period.Within the high pressure half period, the absorber of each adsorption compression unit is successively heated (controller controls lower heater block and opens successively) successively, the working medium be adsorbed in adsorbent is released in the cavity of absorber, when forming certain high pressure, air bleeding valve is opened successively, makes to form high pressure in cooling assembly 2 cavity.When reaching balance in pressure in adsorption compression unit and cooling assembly 2 cavity, air bleeding valve is closed automatically successively, and adsorption compression unit enters cooling stage immediately after respective exhaust valve closure.When the exhaust valve closure of last compression absorbing unit, the high pressure half period terminates, enter the low pressure half period of cooling assembly 2, the adsorption compression unit of first exhaust valve closure completes cooling procedure just, its adsorbent gas working medium, make the pressure reduction in its absorber cavity internal pressure and cooling assembly 2 cavity reach certain value, intake valve is opened automatically, the further adsorbed gas of adsorbent.The intake valve of other adsorption compression unit is also opened successively, makes to reach certain low pressure in cooling assembly 2; When pressure in adsorption compression unit and cooling assembly 2 cavity internal pressure balance, each intake valve cuts out successively, and the adsorption compression unit of closing intake valve enters the heating period at once successively, until last intake valve cuts out, low pressure cycle terminates.Now, first pressure reduction starting adsorption compression unit and cooling assembly 2 cavity heated reaches the critical value that air bleeding valve is opened just, is about to enter the high pressure half period; Above process moves in circles, forming frequency in vascular refrigerator is made to be stabilized in the pressure oscillation (can be realized by the time and interval that control heating and cooling in adsorption compression unit) of certain value between 1-3Hz, the temperature at cool end heat exchanger 4 place just can decline, and finally reach a stable low temperature, the minimum temperature that current single-stage GM type pulse tube refrigeration function reaches is at about 10K, and this is that the two-stage Stirling vascular refrigerator of space application and sterlin refrigerator are all beyond one's reach warm area.
System is as above-mentioned flow process and require to install, and after installing, is evacuated to 10 to internal system
-1about Pa, then insufflation gas working medium, keep being evacuated to 10 to internal system again in about 5 minutes
-1about Pa.After so repeatedly vacuumizing inflation 3-4 time, be finally filled with the gas working medium of operating pressure, can the purity of working medium in guarantee system.Open the controller power source controlling heater block switch and adsorption compression unit external refrigeration parts switch in all adsorption compression unit, make system worked well constant to cool end heat exchanger temperature stabilization, corresponding cryogenic temperature and refrigerating capacity can be obtained at cool end heat exchanger 4 place.
Program advantage: except the air inlet and exhaust valve that pressure difference controls, without any moving component, system vibration is extremely low, extremely strong to environmental suitability, application becomes possibility in profound hypothermia space to make vascular refrigerator.
Embodiment 2
As shown in Figure 2 without the low vibrations GM type vascular refrigerator of oil, distinguish with embodiment 1 and be: GM type compression set 1 is composed in series by multi-stage absorption compressor bank 8.
Annexation between each parts is:
The outlet of multi-stage absorption formula compressor bank 8 previous stage is connected with the entrance of next stage.The entrance of first order absorption type compressor bank is connected with the compressor outlet of afterbody, and is communicated with regenerator 3 hot junction.Other are identical with embodiment 1.
The refrigeration machine course of work is:
The course of work of adsorption compression unit and embodiment 1 basic simlarity in each adsorption compression unit.When adsorption compression unit each in upper level adsorption compression unit is vented successively, each adsorption compression unit air-breathing successively in next stage adsorption compression unit; When adsorption compression unit each in upper level adsorption compression unit successively air-breathing, in next stage adsorption compression unit, each adsorption compression unit is vented successively.Air-breathing in the alternation low pressure half period of adsorption compression unit gas in cooling assembly 2 cavity of first order adsorption compression unit and afterbody adsorption compression unit, in cooling assembly 2 cavity gas the alternation high pressure half period in be vented.
System is as above-mentioned flow process and require to install, and after installing, is evacuated to 10 to internal system
-1about Pa, then insufflation gas working medium, keep being evacuated to 10 to internal system again in about 5 minutes
-1about Pa.After so repeatedly vacuumizing inflation 3-4 time, be finally filled with the gas working medium of operating pressure, can the purity of working medium in guarantee system.Open the controller power source controlling heater block switch and adsorption compression unit external refrigeration parts switch in all adsorption compression unit, make system worked well constant to cool end heat exchanger temperature stabilization, corresponding cryogenic temperature and refrigerating capacity can be obtained at cool end heat exchanger 4 place.
The program is on the basis of embodiment 1, and the advantage of increase: can reach larger gas working medium compression ratio, is conducive to promoting pulse tube refrigeration performance, reduces cryogenic temperature, or improve refrigerating capacity.
Embodiment 3
As shown in Figure 3, without the low vibrations GM type vascular refrigerator of oil, be that each adsorption compression unit is formed by multiple adsorbers serial with the difference of embodiment 1, each absorber outlet is provided with one-way exhaust valve, and each absorber entrance is provided with breather cheek valve.Between adsorption compression unit, same employing is arranged in parallel, and forms adsorption compression unit.
In each adsorption compression unit, when upper level absorber is vented, next stage absorber air-breathing; When upper level adsorption compression unit successively air-breathing, next stage adsorption compression unit is vented successively.Air-breathing in the alternation low pressure half period of first order absorber and afterbody absorber gas in cooling assembly 2 cavity, in cooling assembly 2 cavity gas the alternation high pressure half period in be vented.
The program, compared with embodiment 2, provides the method for different raising compression ratios, with the Dominant Facies of embodiment 2 seemingly, compacter in structure.
Embodiment 4
As shown in Figure 4, without the low vibrations GM type vascular refrigerator of oil, be with the difference of embodiment 1, between adsorption compression unit 8 high-low pressure mouth and regenerator, add high pressure air reservoir 13, high pressure control valve 11 and low pressure air reservoir 12, low-pressure control valve 10 respectively.
Annexation between each parts is: the high-pressure mouth of adsorption compression unit 8 is connected with the entrance of high pressure air reservoir 13, the outlet of high pressure air reservoir 13 is connected with the entrance of high pressure control valve 11, and the outlet of high pressure control valve 11 is connected with the hot junction of regenerator 3 with the entrance of low-pressure control valve 10.The outlet of low-pressure control valve 10 is connected with the entrance of low pressure air reservoir 12, and the outlet of low pressure air reservoir 12 is connected with the low pressure port of adsorption compression unit 8.
The refrigeration machine course of work is:
The course of work of adsorption compression unit and embodiment 1 and 2 basic simlarity in each adsorption compression unit.High and low pressure air reservoir act as steady pressure, collecting gas; The alternative frequency acting as working medium air-flow in control cooling assembly 2 cavity of high and low pressure control valve.Be with the difference of embodiment 1: the separate control of air-flow alternative frequency 1, in work period of adsorption compression unit and cooling assembly 2 cavity; 2, in cooling assembly 2 cavity, alternation high pressure half period inner high voltage control valve 11 ACTIVE CONTROL of gas is opened, and low-pressure control valve 10 ACTIVE CONTROL is closed; In cooling assembly 2 cavity, alternation low pressure half period inner high voltage control valve 11 ACTIVE CONTROL of gas is closed, and low-pressure control valve 10 ACTIVE CONTROL is opened.High-low pressure control valve switch alternating frequency controls certain value between 1-3Hz.
The course of work of refrigeration unit inner refrigerant is:
System is as above-mentioned flow process and require to install, and after installing, is evacuated to 10 to internal system
-1about Pa, then insufflation gas working medium, keep being evacuated to 10 to internal system again in about 5 minutes
-1about Pa.After so repeatedly vacuumizing inflation 3-4 time, be finally filled with the gas working medium of operating pressure, can the purity of working medium in guarantee system.Open and control heater block switch and the controller power source of adsorption compression unit external refrigeration parts switch and the controller power source of high pressure control valve 11 and low-pressure control valve 10 in all adsorption compression unit, make system worked well constant to cool end heat exchanger temperature stabilization, corresponding cryogenic temperature and refrigerating capacity can be obtained at cool end heat exchanger 4 place.
The program is on the basis of embodiment 1 and 2, the advantage increased: the pressure that Compressed Gas is obtained is more stable, and the air-flow alternative frequency that can independently control in vascular refrigerator cavity, realize better mating between GM type compression set and cooling assembly, promote overall efficiency.
Embodiment 5
As shown in Figure 5, without the low vibrations GM type vascular refrigerator of oil, be that GM type compressor bank 1 is by floating scroll compressor 9, high pressure air reservoir 13, low pressure air reservoir 12, high pressure control valve 11, low-pressure control valve 10 with the difference of embodiment 1,2,3 and 4.
Annexation between each parts is:
The high-pressure mouth of floating scroll compressor 9 is communicated with high pressure control valve 11 with high pressure air reservoir 13 successively by pipeline, and the low pressure port of the scroll compressor 9 that floats is communicated with low-pressure control valve 10 with low pressure air reservoir 12 by pipeline.The entrance of low-pressure control valve 10 is communicated with regenerator 3 hot junction with the outlet of high pressure control valve 11.
The refrigeration machine course of work is:
The screw compressor 9 that floats continues to provide high and low pressure.In cooling assembly 2 cavity, alternation high pressure half period inner high voltage control valve 11 ACTIVE CONTROL of gas is opened, and low-pressure control valve 10 ACTIVE CONTROL is closed; In cooling assembly 2 cavity, alternation low pressure half period inner high voltage control valve 11 ACTIVE CONTROL of gas is closed, and low-pressure control valve 10 ACTIVE CONTROL is opened.This process makes forming frequency in vascular refrigerator be stabilized in the pressure oscillation of certain value between 1-3Hz, and the temperature at cool end heat exchanger 4 place just can decline, and finally reaches a stable low temperature.
Program advantage: system architecture is simple, and compressor is commercially produced, easily realizes, and still can meet long-life application requirement, without the need to worrying oil pollution problem in vascular refrigerator.
Compared with the stirling-type vascular refrigerator driven with current employing Linearkompressor, these embodiments can reach lower cryogenic temperature, fill up vascular refrigerator blank in the application of more low-temperature space.
Claims (10)
1., without the low vibrations GM type vascular refrigerator of oil, comprise cooling assembly and drive the compression unit of cooling assembly, it is characterized in that, described compression unit is the GM type compression set without oily low vibration; Described cooling assembly is pulse tube refrigeration assembly; The working medium Oscillating flow frequency that described GM type compression set produces in cooling assembly is within the scope of 1-3Hz.
2. according to claim 1 without the low vibrations GM type vascular refrigerator of oil, it is characterized in that, described GM type compression set is the absorption type compressor bank of single-stage or plural serial stage, and described absorption type compressor bank comprises multiple adsorption compression unit be arranged in parallel.
3. according to claim 2 without the low vibrations GM type vascular refrigerator of oil, it is characterized in that, described adsorption compression unit comprises:
One or more absorber be arranged in series;
Be located at the one-way exhaust valve on each absorber export pipeline;
Be located at the breather cheek valve on each absorber entrance pipe;
To the controlled heater block of absorber heating.
4. according to the low vibrations GM type vascular refrigerator of nothing oil that claim 3 is stated, it is characterized in that, pipeline between described adsorption compression unit and cooling assembly is established the high pressure control valve for controlling alternative frequency in cooling assembly and low-pressure control valve, and import and export to be provided with at adsorption compression unit and adsorption compression unit to be exported and the gas of input carries out the air reservoir of voltage stabilizing.
5. according to claim 1 without the low vibrations GM type vascular refrigerator of oil, it is characterized in that, described GM type compression set comprises:
Float screw compressor;
Be located at high pressure air reservoir and the high pressure control valve of floating screw compressor export pipeline;
And be located at low pressure air reservoir and the low-pressure control valve of floating screw compressor entrance pipe.
6. the low vibrations GM type vascular refrigerator of nothing oil according to the arbitrary claim of claim 1-5, it is characterized in that, described pulse tube refrigeration assembly is single-stage pulse tube refrigeration unit.
7. the low vibrations GM type vascular refrigerator of nothing oil according to the arbitrary claim of claim 1-5, it is characterized in that, described pulse tube refrigeration assembly is gas coupled mode multi-stage pulse tube refrigeration unit, or thermal coupling type multi-stage pulse tube refrigeration unit.
8. the low vibrations GM type vascular refrigerator of nothing oil according to the arbitrary claim of claim 1-5, it is characterized in that, described GM type compression set is in low temperature environment, by cryogenic liquid or cryocooled.
9. according to claim 6 without the low vibrations GM type vascular refrigerator of oil, it is characterized in that, described GM type compression set is imported and exported and is communicated with by the regenerator of pipeline with pulse tube refrigeration assembly, regenerator is communicated with vascular by cool end heat exchanger, and vascular is communicated with phase modulating mechanism with vascular hot-side heat exchanger successively; Described phase modulating mechanism and regenerator hot junction with two respectively with the pipeline connection of the contrary check valve arranged.
10. the low vibrations GM type vascular refrigerator of nothing oil according to the arbitrary claim of claim 1-5, it is characterized in that, the cold-producing medium of employing is the mixed working fluid of helium, nitrogen, hydrogen, neon and these gases.
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| CN108444157A (en) * | 2018-04-09 | 2018-08-24 | 杨厚成 | A kind of mixed working fluid filling system and filling method for acoustic energy refrigeration machine |
| CN110959094A (en) * | 2017-08-01 | 2020-04-03 | 住友重机械工业株式会社 | Ultra-low temperature refrigerating device and temperature rising method of pulse tube refrigerator |
| CN112413918A (en) * | 2020-11-09 | 2021-02-26 | 深圳供电局有限公司 | Low-temperature refrigerator |
| CN112689735A (en) * | 2018-08-08 | 2021-04-20 | 牛津仪器纳米技术工具有限公司 | Method for reducing noise |
| CN113091342A (en) * | 2021-03-12 | 2021-07-09 | 同济大学 | Pulse tube refrigerator with inertia tube and small hole valve for common phase modulation |
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| CN110959094A (en) * | 2017-08-01 | 2020-04-03 | 住友重机械工业株式会社 | Ultra-low temperature refrigerating device and temperature rising method of pulse tube refrigerator |
| CN110959094B (en) * | 2017-08-01 | 2021-10-29 | 住友重机械工业株式会社 | Ultra-low temperature refrigerating device and temperature rising method of pulse tube refrigerator |
| CN108444157A (en) * | 2018-04-09 | 2018-08-24 | 杨厚成 | A kind of mixed working fluid filling system and filling method for acoustic energy refrigeration machine |
| CN108444157B (en) * | 2018-04-09 | 2023-09-22 | 杨厚成 | Mixed working medium filling system and method for acoustic energy refrigerator |
| CN112689735A (en) * | 2018-08-08 | 2021-04-20 | 牛津仪器纳米技术工具有限公司 | Method for reducing noise |
| CN112413918A (en) * | 2020-11-09 | 2021-02-26 | 深圳供电局有限公司 | Low-temperature refrigerator |
| CN112413918B (en) * | 2020-11-09 | 2023-07-25 | 深圳供电局有限公司 | Low-temperature refrigerator |
| CN113091342A (en) * | 2021-03-12 | 2021-07-09 | 同济大学 | Pulse tube refrigerator with inertia tube and small hole valve for common phase modulation |
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