CN104764238B - Oil-free low vibrations GM type vascular refrigerator - Google Patents
Oil-free low vibrations GM type vascular refrigerator Download PDFInfo
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- CN104764238B CN104764238B CN201510193420.0A CN201510193420A CN104764238B CN 104764238 B CN104764238 B CN 104764238B CN 201510193420 A CN201510193420 A CN 201510193420A CN 104764238 B CN104764238 B CN 104764238B
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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 a kind of low vibrations GM type vascular refrigerator of oil-free, including GM type compressor and cooling assembly.GM type compressor can be adsorption compression unit or floating group of scroll compressor.Cooling assembly is vascular refrigerator.Adsorption compression machine does not almost have moving component, long service life, and vibration is extremely low, and reliability is high；Business-like floating scroll compressor at present, without oil lubrication, efficiency is higher, compact conformation, and compared with the helium compressor of traditional oil lubrication, service life is no longer limited by the oily adsorber life-span, and vibration is less, disclosure satisfy that space application requires.The type of drive of above-mentioned oil-free 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, the GM type vascular refrigerator of this oil-free low vibration has larger advantage with respect to poorly efficient stirling-type vascular refrigerator.
Description
Technical field
The present invention relates to refrigeration technology field, it is specifically related to a kind of oil-free low vibrations GM type vascular refrigerator.
Background technology
(" low temperature " described herein, refers generally to below 120K warm area to have obtained the ripe low temperature applied.) refrigeration machine has Si Te
Woods refrigeration machine, GM refrigeration machine, vascular refrigerator and the J-T j-t refrigerator using these philip refrigerator pre-coolings, these
Refrigeration machine is required at least one compressor as driving source, and the volume and weight of compressor bank generally accounts for the whole machine of refrigeration machine
More than 50%, for vascular refrigerator, compressor bank is the part uniquely containing moving component in these refrigeration machines, therefore, pressure
The volume of contracting unit, 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 driving source.The former is mostly using linear
Driven compressor, frequency is higher, typically in more than 10Hz, obtains the larger refrigerating capacity of unit volume with this, can reach at present
The requirement of space application, and the problems such as also lead to regenerator heat exchange insufficient because frequency is higher, obtain refrigerating capacity institute in below 20K
The cost that need to pay is too big, limits its application in profound hypothermia area, although can reach liquid by three-level and above structure at present
Helium warm area, but extremely inefficient, still temporary no space application.The latter is now many to be driven using the scroll compressor driving GM refrigeration machine,
And the direct current working medium that helium scroll compressor exports is changed into by the friendship needed for GM type vascular refrigerator by height pressure control valve
Become flow working medium, and high-low pressure switching frequency is controlled in the range of 1-3Hz, the ratio of high-low pressure is also larger.This makes
Helium working medium can abundant heat exchange in regenerator, adiabatic expansion refrigeration is also more significantly, therefore the GM pulse tube refrigeration of two-stage
Machine structure can reach the cryogenic temperature of 2.2K, be obtained in that the refrigerating capacity of more than 1W in 4.2K.And traditional GM type vascular system
This scroll compressor repacking that cold uses, from the screw compressor of domestic air conditioning, needs oil lubrication, leads to compressor bank
Contain the return line of complexity and oily adsorber etc. so as to volume and weight is multiplied；Meanwhile, the oily adsorber replacement cycle
Short, limit the service life of the whole machine of refrigeration machine.Therefore GM type vascular refrigerator is not considered for space item yet.
With scientific and technical progress, two kinds of Compressor Technology that can meet space application long life requirement are currently had to can use
In the scroll compressor substituting Traditional GM type vascular refrigerator：One is adsorption-type compressor；Two is floating scroll compressor
Machine.
Adsorption-type compressor maturation is applied to space refrigeration technology, but in refrigeration machine field, only throttles in JT at present and make
Application is obtained in cold.Such compressor no any moving component in addition to intake and exhaust valve group, only relies on adsorbent to working medium in height
To obtain the effect of compression working medium, basic solution motion portion respectively by physics or Chemical releases or absorption under gentle low temperature
Loss and vibration problem that part brings.High space application occasion is being required to low vibrations, this is currently the only adopted pressure
Contracting type of drive；
Floating scroll compressor technology determines self-adding design structure between scrollwork using dynamic, thus solving other design knots
Structure because product normally run the wear problem causing so as to energy efficiency and volumetric efficiency present during whole service life by
Step improves until complete break-in state, can accomplish full-oil-free lubrication at present, without friction, maximal pressure ratio reaches 200:More than 1, energy
Enough meet space-efficient, compact and long-life requirement.Therefore floating scroll compressor technology is applied to Cryo Refrigerator,
Particularly space low-temperature refrigeration technology, its effect is obviously.
Replace traditional scroll compressor in this two kinds of compressible drive modes, the space of GM type vascular refrigerator must be made
Application is possibly realized, and so that vascular refrigerator is become a reality in the space application of liquid helium region.
Content of the invention
The invention provides oil-free low vibrations GM type vascular refrigerator, this refrigeration machine is using the compressor work of oil-free low vibration
For the driving source of refrigeration machine, relieve Traditional GM type vascular refrigerator and limited by the life-span that oily adsorber causes, disclosure satisfy that sky
Between apply efficient, compact and reliable (long-life) etc. require.
A kind of low vibrations GM type vascular refrigerator of oil-free, including cooling assembly and the compression unit that drives cooling assembly,
Described compression unit is the GM type compressor of oil-free low vibration；Described cooling assembly is pulse tube refrigeration assembly；Described GM type pressure
The working medium Oscillating flow frequency that compression apparatus produce in cooling assembly is in the range of 1-3Hz.
Preferably, described GM type compressor is single-stage or the adsorption-type compressor bank of plural serial stage, described adsorption-type
Compressor bank includes multiple adsorption compression units being arranged in parallel.
Preferably, described adsorption compression unit includes：
One or more adsorbers being arranged in series；
One-way exhaust valve on each adsorber export pipeline；
Breather cheek valve on each adsorber entrance pipe；
Controlled heater block to adsorber heating.
Include in GM type compressor controlling heater block according to the controller of setting cycle alternate run simultaneously.
In technique scheme, each adsorber is imported and exported and is equipped with check valve, and physics or change are passed through in adsorber internal adsorption agent
Learn the gas adsorbing before reaction release, when adsorber intracavity forms certain high pressure, before outlet one-way exhaust valve is because producing
Positive pressure reduction automatically opens up afterwards, and entrance breather cheek valve remains closed because of the reverse differential pressure producing；Pass through thing in adsorber
Reason or chemical reaction adsorbed gas, when adsorber intracavity forms low pressure, entrance breather cheek valve is because of pressure positive before and after producing
Difference automatically opens up, and exports one-way exhaust valve and remain closed because of the reverse differential pressure producing.Each adsorption compression unit is with necessarily suitable
Sequence alternate run within each cycle, constitutes stable height pneumatic supply.This process makes working medium produce in cooling assembly cavity
The Oscillating flow of certain pressure reduction, thus obtain refrigerating capacity at cool end heat exchanger.
For lifting pressure ratio, refrigeration machine is made to obtain more preferable refrigeration performance, preferably, described GM type compressor is multistage
The adsorption-type compressor bank of series connection.When an adsorption compression unit includes multiple adsorber being arranged in series, each absorption
Device outlet is provided with one-way exhaust valve, and each adsorber entrance is provided with breather cheek valve.
For stablizing each adsorption compression unit intake and exhaust pressure, more accurately control the alternation frequency of cooling assembly intracavity air-flow
Rate, preferably, set on the pipeline between described adsorption compression unit and cooling assembly for controlling alternation frequency in cooling assembly
The high pressure control valve of rate and low-pressure control valve, and be provided with to the output of adsorption compression unit in the import and export of adsorption compression unit and input
Gas carry out the air reservoir of voltage stabilizing.Actual when connecting, the high-pressure mouth of adsorption compression unit pass through pipeline successively with high pressure air reservoir and
High pressure control valve is connected, and is finally connected with cooling assembly；The low pressure port of adsorption compression unit pass through pipeline successively with low pressure air reservoir
It is connected with low-pressure control valve, be finally connected with cooling assembly.
Adsorption compression machine does not almost vibrate, long service life, and reliability is high, is mainly used in driving JT throttling system before this
Cold, application scenario to low vibration and long-life require high, be introduced into for driving GM type vascular refrigerator, make GM type
The vibration of vascular refrigerator and life problems are all resolved, in below 20K warm area, with respect to poorly efficient and carry moving component
Stirling-type vascular refrigerator, there is overwhelming advantage, so that vascular refrigerator is expanded further in the scope of space application.
Preferably, described GM type compressor includes：
Floating screw compressor；
High pressure air reservoir and high pressure control valve located at floating screw compressor export pipeline；
And the low pressure air reservoir located at floating screw compressor entrance pipe and low-pressure control valve.
In technique scheme, the high-pressure mouth of floating scroll compressor is voltage-controlled with high pressure air reservoir and height successively by pipeline
Valve connection processed, the low pressure port of floating scroll compressor is connected with low pressure air reservoir and low-pressure control valve successively by pipeline, high pressure
, in this system operation with certain frequency alternation switch, effect is to provide floating screw compressor for control valve and low-pressure control valve
Direct current working medium enter regenerator before be changed into Oscillating flow working medium.
Described pulse tube refrigeration assembly is single-stage pulse tube refrigeration unit.According to working medium flow direction, described GM type compressor turnover
Mouthful connected with the regenerator of cooling assembly by pipeline, regenerator is connected with vascular by cool end heat exchanger, vascular successively with arteries and veins
Pipe hot end heat exchanger connects with phase modulating mechanism.
Described pulse tube refrigeration assembly is gas coupled mode multi-stage pulse tube refrigeration unit, or thermal coupling type multi-stage pulse tube refrigeration is single
Unit.
Floating scroll compressor need not oily adsorber and return line device, greatly simplify compressor bank
Structure, volume and weight is much smaller than the scroll compressor of oil lubrication, and pressure working condition also can meet GM type vascular system easily
The demand of cold, and floating scroll compressor has been commercialized production, this is to enable GM type vascular refrigerator to meet sky easily
Between application requirement, make vascular refrigerator in below 20K, particularly liquid helium region realizes its practical value.
For lifting vascular refrigerator performance further, its GM type compressor 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 lifting the performance of vascular refrigerator further, phase modulating mechanism can be with regenerator hot junction with two lists being reversed
To valve connection；For suppressing the DC-flow being caused by real material and gas non-ideal behavior.
For solving the problems, such as the highly effective refrigeration of different warm areas, cold-producing medium is helium, nitrogen, hydrogen, neon and these gases
Mixed working fluid.
Compared with prior art, beneficial effects of the present invention are embodied in：
The adsorption-type compressor that the present invention adopts almost does not have moving component, long service life, vibrates extremely low, reliability
High；Business-like floating scroll compressor at present, without oil lubrication, efficiency is higher, compact conformation, with traditional oil lubrication
Helium compressor compare, service life is no longer limited by the oily adsorber life-span, and vibration is less, disclosure satisfy that space application will
Ask.The type of drive of above-mentioned oil-free low vibration is used for GM type vascular refrigerator can make vibration and the life-span of GM type vascular refrigerator
Problem is all resolved.In the profound hypothermia space refrigeration field of below 20K warm area, the GM type vascular system of this oil-free low vibration
Cold has larger advantage with respect to poorly efficient stirling-type vascular refrigerator.
Brief description
Fig. 1 is the structural representation of the first embodiment of oil-free low vibrations GM type vascular refrigerator of the present invention.
Fig. 2 is the structural representation of the oil-free low vibrations GM type vascular refrigerator second embodiment of the present invention.
Fig. 3 is the structural representation of oil-free low vibrations GM type the third embodiment of vascular refrigerator of the present invention.
Fig. 4 is the structural representation of oil-free low vibrations the 4th kind of embodiment of GM type vascular refrigerator of the present invention.
Fig. 5 is the structural representation of oil-free low vibrations the 5th kind of embodiment of GM type vascular refrigerator of the present invention.
Wherein：1：GM type compressor, 2：Cooling assembly, 3：Regenerator, 4：Cool end heat exchanger, 5：Vascular, 6：Vascular heat
End heat exchanger, 7：Phase modulating mechanism, 8：Adsorption compression unit, 9：Floating scroll compressor, 10：Low-pressure control valve, 11：High voltage-controlled
Valve processed, 12：Low pressure air reservoir, 13：High pressure air reservoir.
Specific embodiment
Embodiment 1
As shown in figure 1, oil-free low vibrations GM type vascular refrigerator, including GM type compressor 1 and cooling assembly 2, GM type
Compressor 1 is made up of primary adsorption compressor bank 8, and adsorption compression unit 8 is that have some adsorption compression units being arranged in parallel
Composition.Cooling assembly 2 includes regenerator 3, cool end heat exchanger 4, vascular 5, vascular hot-side heat exchanger 6 and phase modulating mechanism 7.Each
Adsorption compression unit includes：Adsorber；One-way exhaust valve and the one-way air inlet being located at adsorber entrance positioned at adsorber outlet
Valve, one-way exhaust valve and breather cheek valve are all by pressure reduction automatic control of opening/closing；And be arranged as required to adsorber is entered
The heater block of row heating or/and the cooling-part that adsorber is cooled down, natural cooling, avoid the need for chiller.Respectively
Annexation between part is：
GM type compressor 1 is imported and exported and is connected with the regenerator 3 of cooling assembly 2 by pipeline, and regenerator 3 is changed by cold end
Hot device 4 is connected with vascular 5, and vascular 5 is connected with vascular hot-side heat exchanger 6 and phase modulating mechanism 7 successively.
Refrigeration machine work process is：
It is a cycle that single adsorption compression unit completes cooling, air-breathing, heating and aerofluxuss Four processes, and this cycle is typically big
The alternating cycles of gas in cooling assembly 2 cavity.Working fluid flow alternating cycles in cooling assembly 2 cavity are divided into high pressure half cycle
Phase and low pressure half period.Within the high pressure half period, successively heated successively (the controller control of adsorber of each adsorption compression unit
Lower heater block is opened successively), adsorb in the cavity that the working medium in adsorbent is released to adsorber, when forming certain high pressure,
Air bleeding valve is opened successively, makes to be formed high pressure in cooling assembly 2 cavity.When pressure and cooling assembly 2 cavity in adsorption compression unit
When inside reaching balance, air bleeding valve is closed automatically successively, and adsorption compression unit immediately enters cooling rank after respective exhaust valve closure
Section.When the exhaust valve closure of last compression absorbing unit, the high pressure half period terminates, and enters the low pressure half of cooling assembly 2
In the cycle, the adsorption compression unit of first exhaust valve closure is exactly completed cooling procedure, its adsorbent adsorbed gas working medium so as to
Adsorber cavity internal pressure reaches certain value with the pressure reduction in cooling assembly 2 cavity, and intake valve automatically opens up, and adsorbent is further
Adsorbed gas.The intake valve of other adsorption compression units is also opened successively, makes to reach certain low pressure in cooling assembly 2；Work as suction
When in attached compression unit, pressure is balanced with cooling assembly 2 cavity internal pressure, each intake valve cuts out successively, closes the absorption of intake valve
Compression unit sequentially enters the heating period at once, until last intake valve cuts out, low pressure cycle terminates.Now, first
The adsorption compression unit beginning to warm up reaches, with the pressure reduction of cooling assembly 2 cavity, the marginal value making air bleeding valve open just, will
Enter the high pressure half period；Above procedure moves in circles, and makes stable certain value between 1-3Hz of forming frequency in vascular refrigerator
Pressure oscillation (be can achieve by controlling the time of heating and cooling and interval in adsorption compression unit), at cool end heat exchanger 4
Temperature will decline, and be finally reached a stable low temperature, the lowest temperature that current single-stage GM type pulse tube refrigeration function reaches
In 10K, this is the two-stage CETRINE vascular refrigerator of space application to degree and sterlin refrigerator is all beyond one's reach warm area.
The for example above-mentioned flow process of system and requirement are installed, and after installing, are evacuated to 10 to internal system-1Pa about, then
Insufflation gas working medium, keeps being evacuated to 10 to internal system again in 5 minutes about-1Pa about.So evacuation inflates 3-4 repeatedly
After secondary, finally it is filled with the gas working medium of operating pressure, you can the purity of working medium in guarantee system.Open all adsorption compressions of control
In unit, the controller power source of heater block switch and adsorption compression unit outside cooling-part switch, makes system worked well extremely
Cool end heat exchanger temperature stabilization is constant, you can obtain corresponding cryogenic temperature and refrigerating capacity at cool end heat exchanger 4.
Program advantage：In addition to the air inlet and exhaust valve that pressure difference controls, no any moving component, system vibration is extremely low, to ring
Border adaptability is extremely strong, so that vascular refrigerator is possibly realized in profound hypothermia space application.
Embodiment 2
Oil-free low vibrations GM type vascular refrigerator as shown in Figure 2, is with embodiment 1 difference：GM type compressor 1 is by many
Level adsorption compression unit 8 is composed in series.
Annexation between each part is：
The outlet of multi-stage absorption formula compressor bank 8 previous stage is connected with the entrance of next stage.First order adsorption-type compressor
The entrance of group is connected with the compressor outlet of afterbody, and connects with regenerator 3 hot junction.Other are same as Example 1.
Refrigeration machine work process is：
The work process of each adsorption compression unit internal adsorption compression unit and embodiment 1 basic simlarity.When upper level absorption
In compressor bank each adsorption compression unit successively aerofluxuss when, in next stage adsorption compression unit, each adsorption compression unit is inhaled successively
Gas；When each adsorption compression unit air-breathing successively in upper level adsorption compression unit, respectively adsorb in next stage adsorption compression unit
Compression unit aerofluxuss successively.The adsorption compression unit of first order adsorption compression unit and afterbody adsorption compression unit is in refrigeration
Air-breathing in the alternation low pressure half period of gas in assembly 2 cavity, in the alternation high pressure half period of gas in cooling assembly 2 cavity
Aerofluxuss.
The for example above-mentioned flow process of system and requirement are installed, and after installing, are evacuated to 10 to internal system-1Pa about, then
Insufflation gas working medium, keeps being evacuated to 10 to internal system again in 5 minutes about-1Pa about.So evacuation inflates 3-4 repeatedly
After secondary, finally it is filled with the gas working medium of operating pressure, you can the purity of working medium in guarantee system.Open all adsorption compressions of control
In unit, the controller power source of heater block switch and adsorption compression unit outside cooling-part switch, makes system worked well extremely
Cool end heat exchanger temperature stabilization is constant, you can obtain corresponding cryogenic temperature and refrigerating capacity at cool end heat exchanger 4.
The program on the basis of embodiment 1, the advantage of increase：Bigger gas working medium compression ratio can be reached, favorably
In lifting pulse tube refrigeration performance, reduce cryogenic temperature, or improve refrigerating capacity.
Embodiment 3
As shown in figure 3, oil-free low vibrations GM type vascular refrigerator, the difference with embodiment 1 is each adsorption compression list
Unit formed by multiple adsorbers serial, each adsorber outlet be provided with one-way exhaust valve, each adsorber entrance be provided with unidirectional enter
Air valve.Equally using being arranged in parallel between adsorption compression unit, constitute adsorption compression unit.
In each adsorption compression unit, when upper level adsorber aerofluxuss, next stage adsorber air-breathing；When upper level absorption
Compression unit successively air-breathing when, next stage adsorption compression unit aerofluxuss successively.First order adsorber and afterbody adsorber exist
Air-breathing in the alternation low pressure half period of gas in cooling assembly 2 cavity, the alternation high pressure half cycle of gas in cooling assembly 2 cavity
Aerofluxuss in phase.
The program is compared with Example 2, there is provided the method for different raising compression ratios, similar to the advantage of embodiment 2,
Compacter in structure.
Embodiment 4
As shown in figure 4, oil-free low vibrations GM type vascular refrigerator, the difference with embodiment 1 is, adsorption compression unit 8
It has been separately added into high pressure air reservoir 13, high pressure control valve 11 and low pressure air reservoir 12, low-pressure control valve between high-low pressure mouth and regenerator
10.
Annexation between each part is：The high-pressure mouth of adsorption compression unit 8 is connected with the entrance of high pressure air reservoir 13, high
The outlet in storehouse 13 of calming the anger is connected with the entrance of high pressure control valve 11, the entrance of the outlet of high pressure control valve 11 and low-pressure control valve 10
It is connected with the hot junction of regenerator 3.The outlet of low-pressure control valve 10 is connected with the entrance of low pressure air reservoir 12, the outlet of low pressure air reservoir 12
It is connected with the low pressure port of adsorption compression unit 8.
Refrigeration machine work process is：
The work process of each adsorption compression unit internal adsorption compression unit and embodiment 1 and 2 basic simlarity.High and low calm the anger
Storehouse act as steady pressure, house gas；High and low pressure control valve act as control cooling assembly 2 cavity in working medium air-flow
Alternative frequency.Difference with embodiment 1 is：1st, the gas in the working cycle of adsorption compression unit and cooling assembly 2 cavity
The stream separate control of alternative frequency；2nd, in cooling assembly 2 cavity, the alternation high pressure half period inner high voltage control valve 11 of gas is main
Dynamic control is opened, and low-pressure control valve 10 active control is closed；The alternation low pressure half period inner high voltage of gas in cooling assembly 2 cavity
Control valve 11 active control is closed, and low-pressure control valve 10 active control is opened.Height pressure control valve switch alternating frequency controls
Certain value between 1-3Hz.
The work process of refrigeration unit inner refrigerant is：
The for example above-mentioned flow process of system and requirement are installed, and after installing, are evacuated to 10 to internal system-1Pa about, then
Insufflation gas working medium, keeps being evacuated to 10 to internal system again in 5 minutes about-1Pa about.So evacuation inflates 3-4 repeatedly
After secondary, finally it is filled with the gas working medium of operating pressure, you can the purity of working medium in guarantee system.Open all adsorption compressions of control
The controller power source of heater block switch and adsorption compression unit outside cooling-part switch and high pressure control valve 11 in unit
With the controller power source of low-pressure control valve 10, make system worked well constant to cool end heat exchanger temperature stabilization, you can in cold end
Corresponding cryogenic temperature and refrigerating capacity is obtained at heat exchanger 4.
The program on the basis of embodiment 1 and 2, the advantage of increase：Make the pressure that compressed gas obtain more stable, and
Can be realized between GM type compressor and cooling assembly preferably with the air-flow alternative frequency in independent control vascular refrigerator cavity
Coupling, lifts overall efficiency.
Embodiment 5
As shown in figure 5, oil-free low vibrations GM type vascular refrigerator, the difference with embodiment 1,2,3 and 4 is that GM type compresses
Unit 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.
Annexation between each part is：
The high-pressure mouth of floating scroll compressor 9 is sequentially communicated with high pressure air reservoir 13 and high pressure control valve 11 by pipeline,
The low pressure port of floating scroll compressor 9 is connected with low pressure air reservoir 12 and low-pressure control valve 10 by pipeline.Low-pressure control valve 10
Entrance connect with the outlet of high pressure control valve 11 and regenerator 3 hot junction.
Refrigeration machine work process is：
Floating screw compressor 9 persistently provides high and low pressure.The alternation high pressure half period of gas in cooling assembly 2 cavity
Inner high voltage control valve 11 active control is opened, and low-pressure control valve 10 active control is closed；The alternation of gas in cooling assembly 2 cavity
Low pressure half period inner high voltage control valve 11 active control is closed, and low-pressure control valve 10 active control is opened.This process makes vascular system
The pressure oscillation of stable certain value between 1-3Hz of forming frequency in cold, the temperature at cool end heat exchanger 4 will decline, and
It is finally reached a stable low temperature.
Program advantage：System structure is simple, and compressor has been commercialized production, easily realizes, and remains to meet the long-life
Application requirement, without having to worry about oily pollution problem in vascular refrigerator.
Compared with the stirling-type vascular refrigerator driving with currently employed Linearkompressor, these embodiments can reach more
Low cryogenic temperature, the application filling up vascular refrigerator in more low-temperature space is blank.
Claims (7)
1. the low vibrations GM type vascular refrigerator of a kind of oil-free, including cooling assembly and the compression unit that drives cooling assembly, its
It is characterised by, described compression unit is the GM type compressor of oil-free low vibration；Described cooling assembly is pulse tube refrigeration assembly；Institute
State the working medium Oscillating flow frequency that GM type compressor produces in cooling assembly in the range of 1-3Hz；Described GM type compression dress
It is set to single-stage or the adsorption-type compressor bank of plural serial stage, described adsorption-type compressor bank includes multiple adsorption pressures being arranged in parallel
Contracting unit；Described adsorption compression unit includes：
One or more adsorbers being arranged in series；
One-way exhaust valve on each adsorber export pipeline；
Breather cheek valve on each adsorber entrance pipe；
Controlled heater block to adsorber heating；
High pressure for controlling alternative frequency in cooling assembly is set on the pipeline between described adsorption compression unit and cooling assembly
Control valve and low-pressure control valve, and adsorption compression unit import and export be provided with to adsorption compression unit output and input gas enter
The air reservoir of row voltage stabilizing.
2. the low vibrations GM type vascular refrigerator of oil-free according to claim 1 is it is characterised in that described GM type compressor
Including：
Floating screw compressor；
High pressure air reservoir and high pressure control valve located at floating screw compressor export pipeline；
And the low pressure air reservoir located at floating screw compressor entrance pipe and low-pressure control valve.
3. the low vibrations GM type vascular refrigerator of the oil-free according to claim 1-2 any claim is it is characterised in that institute
Stating pulse tube refrigeration assembly is single-stage pulse tube refrigeration unit.
4. the low vibrations GM type vascular refrigerator of the oil-free according to claim 1-2 any claim is it is characterised in that institute
Stating pulse tube refrigeration assembly is gas coupled mode multi-stage pulse tube refrigeration unit, or thermal coupling type multi-stage pulse tube refrigeration unit.
5. the low vibrations GM type vascular refrigerator of the oil-free according to claim 1-2 any claim is it is characterised in that institute
State GM type compressor to be in low temperature environment, by cryogenic liquid or cold-producing medium cooling.
6. the low vibrations GM type vascular refrigerator of oil-free according to claim 3 is it is characterised in that described GM type compressor
Import and export and connected with the regenerator of pulse tube refrigeration assembly by pipeline, regenerator is connected with vascular by cool end heat exchanger, vascular
Connect with vascular hot-side heat exchanger and phase modulating mechanism successively；Described phase modulating mechanism and regenerator hot junction are respectively provided with contrary with two
The pipeline connection of the check valve of setting.
7. the low vibrations of the oil-free according to claim 1-2 any claim GM type vascular refrigerator is it is characterised in that adopt
Cold-producing medium is helium, the mixed working fluid of nitrogen, hydrogen, neon and these gases.
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| CN201510193420.0A CN104764238B (en) | 2015-04-22 | 2015-04-22 | Oil-free low vibrations GM type vascular refrigerator |
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| CN201510193420.0A CN104764238B (en) | 2015-04-22 | 2015-04-22 | Oil-free low vibrations GM type vascular refrigerator |
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| JP6740188B2 (en) * | 2017-08-01 | 2020-08-12 | 住友重機械工業株式会社 | Cryogenic refrigerator and pulse tube refrigerator temperature raising method |
| CN108444157B (en) * | 2018-04-09 | 2023-09-22 | 杨厚成 | Mixed working medium filling system and method for acoustic energy refrigerator |
| GB2576185B (en) * | 2018-08-08 | 2022-07-20 | Oxford Instruments Nanotechnology Tools Ltd | Noise reduction method for a cryogenic cooling system |
| CN112413918B (en) * | 2020-11-09 | 2023-07-25 | 深圳供电局有限公司 | Low-temperature refrigerator |
| CN113091342B (en) * | 2021-03-12 | 2022-07-05 | 同济大学 | Pulse tube refrigerator with inertia tube and small hole valve for common phase modulation |
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