CN110274406A - A kind of cold head structure and split type free-piston Stirling cooler - Google Patents
A kind of cold head structure and split type free-piston Stirling cooler Download PDFInfo
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- CN110274406A CN110274406A CN201910574452.3A CN201910574452A CN110274406A CN 110274406 A CN110274406 A CN 110274406A CN 201910574452 A CN201910574452 A CN 201910574452A CN 110274406 A CN110274406 A CN 110274406A
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- expansion
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- compression
- heat exchanger
- slit
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B40/00—Subcoolers, desuperheaters or superheaters
- F25B40/06—Superheaters
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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
- F25B41/00—Fluid-circulation arrangements
- F25B41/20—Disposition of valves, e.g. of on-off valves or flow control valves
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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
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Mechanical Engineering (AREA)
- Thermal Sciences (AREA)
- General Engineering & Computer Science (AREA)
- Compressors, Vaccum Pumps And Other Relevant Systems (AREA)
Abstract
A kind of cold head structure according to the present invention and split type free-piston Stirling cooler, cold head structure include slit heat exchanger；The expansion chamber and the heat pipe of slit heat exchanger surface is set that two coaxial-symmetricals positioned at the both ends of slit heat exchanger are arranged, a plurality of linear slit groove is provided on the inner wall of slit heat exchanger, two expansion chambers at both ends are connected by slit heat exchanger, heat pipe is coiled pulsating heat pipe, because the expansion cylinder thin-walled on the outside of two expansion chambers is linked together with slit heat exchanger and forms novel cold head by cold head structure, therefore, reduce the vibration of the expanding machine of conventional two-piece free-piston type sterlin refrigerator, greatly improve the stability and reliability of refrigeration machine.
Description
Technical field
The invention belongs to refrigerating fields, and in particular to a kind of cold head structure and split type free-piston Stirling cooler.
Background technique
The theoretical refrigerating efficiency of sterlin refrigerator is equal to Carnot efficiency, and efficiency when actual motion is also current low temperature
Highest one kind of efficiency in refrigeration machine.Compressor is completely independent provided separately by split type sterlin refrigerator with expanding machine,
Be connected therebetween by pipe fitting, can to avoid or vibrate influence to cold head with reducing compressor, make cooled
Device is far from vibration source.Free-piston Stirling cooler structure is proposed by William Beale the 1960s, is led
It is characterized in that there is structure using technologies such as linear compressor driving, flexible board spring supporting, clearance seal combination gas bearing
Compact, low noise, service life length, high reliability.
Since space refrigeration has stringent want to the vibration of component and payload under the premise of improving refrigerating efficiency
While asking, therefore improve efficiency of refrigerator, reducing refrigeration machine vibration and improving payload is exactly space refrigerating machine always
Mainstream research direction, the space refrigerating machine of mainstream is mainly sterlin refrigerator and vascular refrigerator, vascular refrigerator at present
There is no moving component, thus it is with small vibration, it is light-weight, but the expansion work in vascular refrigerator vascular dissipates do not recycle completely, turns
Become heat to be dissipated in environment, therefore its refrigerating efficiency is always lower than sterlin refrigerator.Split type freedom used at present
Piston Stirling cooler reduces the vibration of refrigeration machine using one or two expanding machine of opposed pistons driven compressor, still
Without reducing the vibration of expanding machine part well.
Summary of the invention
To solve the above-mentioned problems, while guaranteeing that split type free-piston Stirling cooler own advantages are high-efficient,
Reduce expanding machine partial vibration, enhance reliability, the present invention carries out existing split type free-piston Stirling cooler
Optimization design.
One of the objects of the present invention is to provide a kind of cold head structure and split type free-piston Stirling coolers, originally
Invention improves on the basis of original split type free-piston Stirling cooler, is replaced with a kind of novel cold head structure and is passed
The expanding machine cold head structure of system, by the outside of two expansion chambers expansion cylinder thin-wall tube and slit heat exchanger pass through welding manner
It carries out coupling and forms a novel cold head, and cold head cooling capacity is passed to by required component by heat pipe and is freezed, can effectively drop
The vibration of low bulk machine.
The present invention provides a kind of cold head structures, have the feature that, including slit heat exchanger, are cylindrical in shape；Two
The expansion chamber of coaxial-symmetrical arrangement, positioned at the both ends of slit heat exchanger；And the heat pipe of slit heat exchanger surface is set,
Wherein, a plurality of linear slit groove is provided on the inner wall of slit heat exchanger, two expansion chambers at both ends pass through slit
Formula heat exchanger is connected, and heat pipe is coiled pulsating heat pipe.
It in cold head structure provided by the invention, can also have the following features: wherein, the expansion gas on the outside of expansion chamber
Casing wall pipe is coupled by welding with slit heat exchanger.
The present invention provides a kind of split type free-piston Stirling coolers, have the feature that, including above-mentioned
Cold head structure.
It in split type free-piston Stirling cooler provided by the invention, has the feature that, further includes compression
Portion has compression cylinder, and there are two the compression piston of coaxial-symmetrical arrangement, two compression pistons and pressures for setting in compression cylinder
Contracting cylinder constitutes compression chamber.
In addition, having the feature that, also wrapping in split type free-piston Stirling cooler provided by the invention
Include: bulge has there are two expansion cylinder, the expansion piston for coaxial-symmetrical arrangement that there are two two expansion cylinders settings, and two
Expansion piston and two expansion cylinders constitute two expansion chambers.
In addition, can also have the following features: in split type free-piston Stirling cooler provided by the invention
Wherein, compression unit includes two compression pistons, the two compression piston bars, two compressions that coaxial-symmetrical is arranged in compression cylinder
Piston connector, two linear electric machines, two flat springs and two flat spring brackets, compression piston inside are hollow design,
Compression piston tail portion is connected with compression piston connector, and compression piston bar is arranged in compression piston connector, piston rod one end
It is connected at the top of compression piston, the other end is connected with flat spring.
In addition, can also have the following features: in split type free-piston Stirling cooler provided by the invention
Wherein, bulge includes two expansion pistons, two regenerators, two expansions that coaxial-symmetrical is arranged in two expansion cylinders
Piston connector, two springs, regenerator tubular in a ring, are made of polyester film, be inside expansion piston it is hollow, it is swollen
Swollen piston tail opening is connected with expansion piston connector, and one end of spring is connected with expansion piston connector, the other end and
Spring support is connected.
In addition, having the feature that in split type free-piston Stirling cooler provided by the invention, further including
Conduit connection, with a right compression conduit, two expansion pipelines, connection right compression conduit and two expansion pipeline threeway and
Two solenoid valves, wherein solenoid valve is arranged in threeway and expands the interface of pipeline.
In addition, having the feature that in split type free-piston Stirling cooler provided by the invention, further including
Compression cylinder radiator outside compression chamber is set, and compression cylinder radiator and ambient enviroment carry out heat convection, will compress
The compression heat of intracavitary generation is discharged.
The action and effect of invention
A kind of cold head structure involved according to the present invention and split type free-piston Stirling cooler, because of cold head
Expansion cylinder thin-walled on the outside of two expansion chambers is linked together with slit heat exchanger and forms novel cold head by structure, because
This, reduces the vibration of the expanding machine of conventional two-piece free-piston type sterlin refrigerator, greatly improves refrigeration machine
Stability and reliability.
In addition, expanding machine uses the expansion piston of two coaxial-symmetricals arrangement, two expansion chambers and slit are exchanged heat
Device is coupled by welding manner, it is ensured that axial force can obtain maximum balance, be greatly reduced vibration, enhancing
Reliability.
Further, use pulsating heat pipe as heat pipe, the simple centreless of structure, shape can be arbitrarily bent, equivalent heat transfer
Coefficient is big, small in size, is a kind of high heat flux density, miniaturization and heat transfer element at low cost.
Further, compressor uses the compression piston of two coaxial-symmetricals arrangement, reduces the vibration of compressor.
Further, the present invention provides the expanding machine that an opposed Linearkompressor is arranged to two coaxial-symmetricals to pressure
Wave, by the working condition for the expansion chamber that two coaxial-symmetricals of open and close control of valve are arranged, have high-efficient, high reliablity,
Vibrate low plurality of advantages.
Further, it selects pulsating heat pipe to be combined with cold head, efficiently utilizes pulsating heat pipe high heat flux density, body
Product is small, the advantages of being arbitrarily bent, ensure that effective transmitting of cooling capacity.
Compared with traditional split type free-piston Stirling cooler, cold head structure and split type freedom of the invention
Piston Stirling cooler has many advantages, such as with small vibration, and stability is high, is applicable to the boat of different cryogenic temperatures and refrigerating capacity
Empty AEROSPACE APPLICATION field is also suitble to wine cabinet etc. to require high occasion to reliability and vibration.
Detailed description of the invention
Fig. 1 is that a kind of cold head structure and split type free-piston Stirling cooler section show in the embodiment of the present invention
It is intended to；
Fig. 2 is the perspective cross-sectional schematic diagram of cold head structure in the embodiment of the present invention；
Fig. 3 is a kind of stereoscopic schematic diagram of cold head structure in the embodiment of the present invention；
Fig. 4 is the stereoscopic schematic diagram of cold head structure and the connection type of coiled heat pipe in the embodiment of the present invention；
Fig. 5 is the stereoscopic schematic diagram of cold head structure and the connection type of straight pipe type heat pipe in the embodiment of the present invention two；With
And
Fig. 6 is the perspective cross-sectional schematic diagram of cold head structure in the embodiment of the present invention three.
Specific embodiment
It is real below in order to be easy to understand the technical means, the creative features, the aims and the efficiencies achieved by the present invention
Example combination attached drawing is applied to be specifically addressed cold head structure of the invention and split type free-piston Stirling cooler.
Embodiment one
As shown in Figure 1, split type free-piston Stirling cooler 100 includes compression unit 200, bulge 300, pipeline company
Socket part 400.
Compression unit 200 is by two Linearkompressors 210, two compression pistons 220, compression chamber 230, compressor back pressure cavities
240, upper and lower compressor housing 250, compression cylinder and radiator 260, flanged joint 270 form.
Two Linearkompressors 210 are all by interior yoke and mover 211, permanent magnet 212, permanent magnetism body support frame 213, coil
Skeleton 214, coil 215, outer yoke 216 form.Wherein, there is gap, mover setting between interior yoke 211 and outer yoke 216
In gap, mover includes permanent magnet 212 and permanent magnetism body support frame 213.Outer yoke 216 and interior yoke 211 are soft magnetic materials, are commonly used
The materials such as electric work pure iron, silicon steel sheet are made, and two permanent magnets 212 are made of permanent-magnet material.Interior yoke 211, permanent magnet 212, forever
Magnet carrier 213, coil rack 214, coil 215, outer yoke 216 are annular, and using coaxially arranged.
When coil is passed through direct current, magnetic force loop line will form between interior yoke 211 and outer yoke 216, thus in interior yoke
Magnetic pole is generated on iron and outer yoke 216.When coil is passed through alternating current, permanent magnet 212 will receive alternating electromagnetic force just to do
Linear reciprocating motion.When permanent magnet 212 does linear reciprocating motion, it will drive compression piston 220 and do linear reciprocating motion, plate bullet
Spring 224 provides axial reciprocating elastic power and radial support.
220 inner hollow of compression piston, hollow inside are equipped with threaded hole 221 and 222 spiral shell of compression piston bar close to piston area
It connects, 220 tail portion opening of compression piston is spirally connected with connector 223, and compression piston bar 222 passes through in 223 surface of connector
Heart hole is fixedly connected with flat spring 224, and cooperation is fixed by bolt with flat spring bracket 225 in flat spring 224.Wherein, plate
Spring support 225 is integrated with compressor housing 250, is made of 4 studs.
The compression piston 220 and compression cylinder 260 of two coaxial-symmetricals arrangement constitute compression chamber 230.
Upper and lower compressor housing 250 connect cooperation by flanged joint 270 with compression cylinder and radiator, same by two
The compressor housing 250 and compression chamber 230 of axial symmetry arrangement are closed, and form an entirety.
One end of right compression conduit 401 is connected to compression chamber, and the other end is connected to threeway 404, and Linearkompressor 210 passes through after being powered
Compression piston bar 222 drives mover and compression piston 210 to move, after gas working medium is compressed by compression piston 210, by compression chamber
230 flow to right compression conduit 401.
The heat of compression that 210 compressed gas working medium of compression piston generates timely is discharged by compression cylinder and radiator 260
In ambient enviroment, to improve the working efficiency of compressor.
Bulge 300 is expanded by two expansion pistons 320, two regenerator 330, two of expanding machine back pressure cavity 310, two
Chamber 340, slit heat exchanger 350, heat pipe 360, expander cylinder and shell 370, flanged joint 380 form.
The design of 320 inner hollow of expansion piston, 320 tail portion of expansion piston opening are spirally connected with connector 321, connector
321 are spirally connected fixation with 322 threaded of spring, spring 322 and spring support 323, and spring support bearing 324 is by spring support
323 are fixed on expanding machine shell 370.
The tubular in a ring of regenerator 330, setting is in 320 outside of expansion piston, 370 inside of expander cylinder, one end with return
Hot device bearing 331 is connected, and the other end is connected with slit heat exchanger 360.Regenerator 330 using polyester film, nylon and
Any one in polytetrafluoroethylene material is made, and regenerator 330 is made of polyester film in embodiment one, and polyesters are thin
Film with a thickness of 20~50 μm.
As shown in Fig. 2, slit heat exchanger 350 and the pipe of expansion cylinder 370 in two 340 outsides of expansion chamber pass through welding
Mode, which is coupled, forms a new cold head structure.
In embodiment, 370 tube wall of expansion cylinder in 340 outside of expansion chamber is thin-walled, and material is stainless steel, slit heat exchange
Device 350 is made and cylindrical of red copper, is had the gap between expansion cylinder 370 and slit heat exchanger 350, gap is filled out with solder
It is charged into capable welding.350 interior surface of slit heat exchanger is provided with multiple slit grooves, to enhance heat transfer coefficient, strengthens cold head
Conduction cooling effect.In embodiment, the linear shape of the slit, direction is parallel with the axis of cylinder.
As shown in Figure 1, two expanding machine back pressure cavities 310 and two 340 coaxial-symmetrical of expansion chamber arrangements.Expanding machine shell
370 tail portions are equipped with flanged joint 380, and bulge 300 can connect cooperation with external fixation device by flanged joint 380,
The vibration of refrigeration machine is further decreased, stability is enhanced.
Conduit connection 400 include right compression conduit 401, first expand pipeline 402, second expand pipeline 403, threeway 404,
First solenoid valve 405, second solenoid valve 406.
401 one end of right compression conduit is connected with compression chamber, and the other end is connected with threeway 404, other two gas of threeway 404
Hole is connected with the first expansion pipeline 402 and the second expansion pipeline 403 respectively, and the setting of the first solenoid valve 405 is in threeway 404 and the
The connectivity part of threeway 404 and the second expansion pipeline 403 is arranged in the connectivity part of one expansion pipeline 402, second solenoid valve 406, the
One expansion pipeline 402 and the second expansion pipeline 403 are connected to expanding machine back pressure cavity 310 respectively.
Compressed gas is shunted by threeway 404, passes through the first expansion pipeline 402 and the second expansion pipeline 403 respectively
Expansion piston 320 is pushed to do linear reciprocating motion after into expanding machine back pressure cavity 310, spring 322 provides axial reciprocal elastic force
And radial support.Compressed gas pushes expansion piston 320 to be moved to 330 inlet of regenerator in regenerator 330 for heat
Regenerator matrix is passed to, then swell refrigeration, cooling capacity are changed by slit in expansion chamber 340 and slit heat exchanger 350
Hot device 350 passes to heat pipe 360, and cooling capacity is passed to the component for needing to freeze by the working medium in heat pipe 360.
As shown in Figure 3,4, heat pipe 360 is coiled pulsating heat pipe, is arranged on the outer surface of slit heat exchanger 350,
Pulsating heat pipe can be arbitrarily bent as a kind of new heat pipe, the simple centreless of structure, shape, and equivalent heat transfer coefficient is big, small in size.
Embodiment two
The present embodiment other structures are the same as example 1, the difference is that slit heat exchanger 350, as shown in figure 5, this reality
It applies in regular pentagon prism shape outside the slit heat exchanger 350 in example, it is recessed that the surface of inner passage is still provided with slit
Slot.
Multiple heat pipes are respectively arranged on each pentagonal prisms face, heat pipe still uses pulsating heat pipe, and heat pipe is arranged to
Inverted U-shaped, heat pipe transmits cooling capacity in the form of 2 straight tube cuttages enter 350 surface of slit heat exchanger.
In embodiment, multiple U-shaped heat pipe nestings are disposed on the same plane.
Embodiment three
The present embodiment other structures are the same as example 1, the difference is that 350 internal channel structure of slit heat exchanger is not
Together, as shown in fig. 6, being provided in 350 inner passage of slit heat exchanger so that the completely isolated separator or insulating course in both ends
351, the channel at 350 inside both ends of slit heat exchanger be it is obstructed, two expansion chambers 340 no longer pass through slit heat exchanger
The connection of 350 inner passages.
When 350 inner passage of slit heat exchanger is not connected to, the solenoid valve of two expansion tube roads can be operated, is controlled
It into the working medium flow of two expansion chambers, and then realizes that the refrigerating capacity for controlling two expansion chamber cold heads is different, reaches slit and change
The different effect of cryogenic temperature at hot 350 both ends of device.
Example IV
The present embodiment other structures are identical as embodiment two, the difference is that 350 internal channel structure of slit heat exchanger is not
Together, as shown in fig. 6, being provided in 350 inner passage of slit heat exchanger so that the completely isolated separator or insulating course in both ends
351, the channel at 350 inside both ends of slit heat exchanger be it is obstructed, two expansion chambers 340 no longer pass through slit heat exchanger
The connection of 350 inner passages.
When 350 inner passage of slit heat exchanger is not connected to, the solenoid valve of two expansion tube roads can be operated, is controlled
It into the working medium flow of two expansion chambers, and then realizes that the refrigerating capacity for controlling two expansion chamber cold heads is different, reaches slit and change
The different effect of cryogenic temperature at hot 350 both ends of device.
The action and effect of embodiment
A kind of cold head structure and split type free-piston Stirling cooler according to involved in the present embodiment, because cold
Expansion cylinder thin-walled on the outside of two expansion chambers is formed novel cold head by header structure together with slit Welding of Heat-exchanger, because
This, reduces the vibration of the expanding machine of conventional two-piece free-piston type sterlin refrigerator, greatly improves refrigeration machine
Stability and reliability.
In addition, expanding machine uses the expansion piston of two coaxial-symmetricals arrangement, two expansion chambers and slit are exchanged heat
Device is coupled by welding manner, it is ensured that axial force can obtain maximum balance, be greatly reduced vibration, enhancing
Reliability.
Further, use pulsating heat pipe as heat pipe, the simple centreless of structure, shape can be arbitrarily bent, equivalent heat transfer
Coefficient is big, small in size, is a kind of high heat flux density, miniaturization and heat transfer element at low cost.
Further, compressor uses the compression piston of two coaxial-symmetricals arrangement, reduces the vibration of compressor.
Further, the present embodiment provides the expanding machine that an opposed Linearkompressor is arranged to two coaxial-symmetricals to pressure
Reeb has high-efficient, reliability by the working condition for the expansion chamber that two coaxial-symmetricals of open and close control of valve are arranged
High, the low plurality of advantages of vibration.
Further, it selects pulsating heat pipe to be combined with cold head, efficiently utilizes pulsating heat pipe high heat flux density, body
Product is small, the advantages of being arbitrarily bent, ensure that effective transmitting of cooling capacity.
Further, the opening and closing of the solenoid valve of two expansion tube roads can control the working condition of expansion chamber, realize not
Same cryogenic temperature and refrigerating capacity requires stringent occasion to vibration suitable for aerospace and chateau etc..
Compared with traditional split type free-piston Stirling cooler, the cold head structure of the present embodiment and it is split type from
Had many advantages, such as by piston Stirling cooler with small vibration, stability is high, is applicable to different cryogenic temperatures and refrigerating capacity
Aerospace applications field is also suitble to wine cabinet etc. to require high occasion to reliability and vibration.
Above embodiment is preferred case of the invention, the protection scope being not intended to limit the invention.
Claims (9)
1. a kind of cold head structure characterized by comprising
Slit heat exchanger, is cylindrical in shape；
The expansion chamber of two coaxial-symmetricals arrangement, positioned at the both ends of the slit heat exchanger；And
The heat pipe of the slit heat exchanger surface is set,
Wherein, a plurality of linear slit groove is provided on the inner wall of the slit heat exchanger,
Two expansion chambers at both ends are connected by the slit heat exchanger,
The heat pipe is coiled pulsating heat pipe.
2. cold head structure according to claim 1, it is characterised in that:
Wherein, the expansion cylinder wall pipe on the outside of the expansion chamber and the slit heat exchanger are coupled in one by welding
It rises.
3. a kind of split type free-piston Stirling cooler, it is characterised in that:
Including cold head structure of any of claims 1 or 2.
4. split type free-piston Stirling cooler according to claim 3, which is characterized in that further include:
Compression unit has compression cylinder, and there are two the compression piston of coaxial-symmetrical arrangement, two institutes for setting in the compression cylinder
It states compression piston and the compression cylinder constitutes compression chamber.
5. split type free-piston Stirling cooler according to claim 3, which is characterized in that further include:
Bulge, there are two expansion cylinder, two expansion cylinders to be arranged there are two the expansion piston of coaxial-symmetrical arrangement for tool,
Two expansion pistons and two expansion cylinders constitute two expansion chambers.
6. split type free-piston Stirling cooler according to claim 4, it is characterised in that:
Wherein, the compression unit includes two compression pistons, two institutes that coaxial-symmetrical is arranged in the compression cylinder
Compression piston bar, two compression piston connectors, two linear electric machines, two flat springs and two flat spring brackets are stated,
It is hollow design inside the compression piston, the compression piston tail portion is connected with the compression piston connector, described
Compression piston bar is arranged in the compression piston connector, and described piston rod one end is connected at the top of the compression piston, separately
One end is connected with the flat spring.
7. split type free-piston Stirling cooler according to claim 5, it is characterised in that:
Wherein, the bulge includes two expansion pistons, two that coaxial-symmetrical is arranged in two expansion cylinders
A regenerator, two expansion piston connectors, two springs,
Regenerator tubular in a ring, is made of polyester film,
Be inside the expansion piston it is hollow, the expansion piston tail portion opening is connected with the expansion piston connector, described
One end of spring is connected with the expansion piston connector, and the other end is connected with the spring support.
8. split type free-piston Stirling cooler according to claim 3, which is characterized in that further include:
Conduit connection has a right compression conduit, two expansion pipelines, is connected to the right compression conduit and two expansion tubes
The threeway on road and two solenoid valves,
Wherein, the interface of the threeway and the expansion pipeline is arranged in the solenoid valve.
9. split type free-piston Stirling cooler according to claim 3, which is characterized in that further include:
Compression cylinder radiator outside the compression chamber is set,
The compression cylinder radiator and ambient enviroment carry out heat convection, and the compression heat generated in the compression chamber is arranged
Out.
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