CN110274406B - Cold head structure and split type free piston Stirling refrigerating machine - Google Patents
Cold head structure and split type free piston Stirling refrigerating machine Download PDFInfo
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- CN110274406B CN110274406B CN201910574452.3A CN201910574452A CN110274406B CN 110274406 B CN110274406 B CN 110274406B CN 201910574452 A CN201910574452 A CN 201910574452A CN 110274406 B CN110274406 B CN 110274406B
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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
Abstract
According to the cold head structure and the split type free piston Stirling refrigerator, the cold head structure comprises a slit type heat exchanger; the expansion chamber that is located two coaxial symmetrical arrangement at slit type heat exchanger's both ends and the heat pipe of setting on slit type heat exchanger surface, be provided with many on slit type heat exchanger's the inner wall and be sharp slit type recess, two expansion chambers at both ends are linked together through slit type heat exchanger, the heat pipe is coil pipe formula pulsation heat pipe, because the cold head structure links together the expansion cylinder thin wall in two expansion chamber outsides and slit type heat exchanger and constitutes neotype cold head, consequently, the vibration of the expander of traditional split type free piston stirling refrigerator has been reduced, very big improvement the stability and the reliability of refrigerator.
Description
Technical Field
The invention belongs to the field of refrigeration, and particularly relates to a cold head structure and a split type free piston Stirling refrigerator.
Background
The theoretical refrigeration efficiency of the Stirling refrigerator is equal to the Carnot efficiency, and the efficiency of the Stirling refrigerator in actual operation is also the highest efficiency in the current low-temperature refrigerator. The split type Stirling refrigerating machine is used for completely and independently separating the compressor and the expander, the compressor and the expander are communicated through the pipe fitting, the influence of the vibration of the compressor on the cold head can be avoided or reduced, and a cooled device is far away from a vibration source. The free piston Stirling refrigerator structure is proposed by William Beam in the 60 th of the 20 th century, and is mainly characterized in that the technologies of linear compressor driving, flexible plate spring supporting, gap sealing and gas bearing combination and the like are adopted, so that the free piston Stirling refrigerator structure has the advantages of compact structure, low noise, long service life, high reliability and the like.
Because space refrigeration has strict requirements on vibration of components and effective load on the premise of improving refrigeration efficiency, the vibration of a refrigerator and the effective load are always the main research directions of the space refrigerator while the efficiency of the refrigerator is improved. The split free piston stirling cryocooler used at present uses an opposed piston compressor to drive one or two expanders to reduce the vibration of the cryocooler, but does not reduce the vibration of the expander section very well.
Disclosure of Invention
In order to solve the problems, the split type free piston Stirling refrigerator is optimized and designed to reduce partial vibration of the expander and enhance reliability while ensuring high advantages and efficiency of the split type free piston Stirling refrigerator.
The invention aims to provide a cold head structure and a split type free piston Stirling refrigerator, which are improved on the basis of the original split type free piston Stirling refrigerator, the novel cold head structure is used for replacing the traditional cold head structure of an expansion machine, thin-walled tubes of expansion cylinders outside two expansion cavities and a slit type heat exchanger are coupled to form a novel cold head in a welding mode, the cold energy of the cold head is transferred to a required component for refrigeration through a heat pipe, and the vibration of the expansion machine can be effectively reduced.
The invention provides a cold head structure, which is characterized by comprising a slit type heat exchanger, a cold head and a cold head, wherein the slit type heat exchanger is cylindrical; two expansion cavities which are coaxially and symmetrically arranged are positioned at two ends of the slit type heat exchanger; and the heat pipe is arranged on the surface of the slit type heat exchanger, wherein a plurality of linear slit type grooves are arranged on the inner wall of the slit type heat exchanger, the two expansion cavities at the two ends are communicated through the slit type heat exchanger, and the heat pipe is a coiled pulsating heat pipe.
In the cold head structure provided by the invention, the cold head structure can also have the following characteristics: the expansion cylinder wall pipe outside the expansion cavity is coupled with the slit type heat exchanger in a welding mode.
The invention provides a split free piston stirling cooler having the features including the cold head structure described above.
The split type free piston Stirling refrigerator provided by the invention has the characteristics that the split type free piston Stirling refrigerator also comprises a compression part, wherein the compression part is provided with a compression cylinder, two compression pistons which are coaxially and symmetrically arranged are arranged in the compression cylinder, and a compression cavity is formed by the two compression pistons and the compression cylinder.
In addition, the split type free piston stirling cryocooler provided by the present invention is characterized by further comprising: the expansion part is provided with two expansion cylinders which are provided with two expansion pistons which are coaxially and symmetrically arranged, and the two expansion pistons and the two expansion cylinders form two expansion cavities.
In addition, the split type free piston stirling cryocooler provided by the invention can also have the following characteristics: wherein, the compression portion includes two compression pistons of coaxial symmetrical arrangement in compression cylinder, two compression piston rods, two compression piston connecting pieces, two linear motor, two leaf springs and two leaf spring supports, the inside cavity design that is of compression piston, the compression piston afterbody links to each other with the compression piston connecting piece, the compression piston rod sets up in the compression piston connecting piece, piston rod one end links to each other in compression piston top, the other end links to each other with the leaf spring.
In addition, the split type free piston stirling cryocooler provided by the invention can also have the following characteristics: the expansion part comprises two expansion pistons, two heat regenerators, two expansion piston connecting pieces and two springs, the expansion pistons, the two heat regenerators, the two expansion piston connecting pieces and the two springs are coaxially and symmetrically arranged in two expansion cylinders, the heat regenerators are in an annular cylinder shape and are made of polyester films, the interior of each expansion piston is hollow, an opening in the tail of each expansion piston is connected with the corresponding expansion piston connecting piece, one end of each spring is connected with the corresponding expansion piston connecting piece, and the other end of each spring is connected with a.
In addition, the split type free piston Stirling refrigerator provided by the invention has the characteristics that the split type free piston Stirling refrigerator also comprises a pipeline connecting part, and the pipeline connecting part is provided with a compression pipeline, two expansion pipelines, a tee joint for communicating the compression pipeline and the two expansion pipelines, and two electromagnetic valves, wherein the electromagnetic valves are arranged at the joints of the tee joint and the expansion pipelines.
In addition, the split type free piston Stirling refrigerator provided by the invention has the characteristics that the split type free piston Stirling refrigerator also comprises a compression cylinder radiator arranged outside the compression cavity, and the compression cylinder radiator performs heat convection with the ambient environment to discharge the compression heat generated in the compression cavity.
Action and Effect of the invention
According to the cold head structure and the split type free piston Stirling refrigerator, the thin walls of the expansion cylinders outside the two expansion cavities are connected with the slit type heat exchanger to form the novel cold head, so that the vibration of the expansion machine of the traditional split type free piston Stirling refrigerator is reduced, and the stability and the reliability of the refrigerator are greatly improved.
In addition, the expansion machine adopts two expansion pistons which are coaxially and symmetrically arranged, and the two expansion cavities and the slit type heat exchanger are coupled together in a welding mode, so that the axial force can be maximally balanced, the vibration is greatly reduced, and the reliability is enhanced.
Furthermore, the pulsating heat pipe is used as a heat pipe, the structure is simple, the core is not needed, the shape can be bent at will, the equivalent heat transfer coefficient is large, the volume is small, and the pulsating heat pipe is a heat transfer element with high heat flow density, miniaturization and low cost.
Further, the compressor adopts two compression pistons which are coaxially and symmetrically arranged, so that the vibration of the compressor is reduced.
Furthermore, the invention provides pressure waves for the two coaxially and symmetrically arranged expansion machines by one opposite linear compressor, controls the working states of the two coaxially and symmetrically arranged expansion cavities by opening and closing the valve, and has the advantages of high efficiency, high reliability, low vibration and the like.
Furthermore, the pulsating heat pipe and the cold head are selected to be combined, so that the advantages of high heat flow density, small volume and random bending of the pulsating heat pipe are effectively utilized, and the effective transmission of cold energy is ensured.
Compared with the traditional split type free piston Stirling refrigerator, the cold head structure and the split type free piston Stirling refrigerator have the advantages of small vibration, high stability and the like, are suitable for the aerospace application field requiring different refrigeration temperatures and refrigeration capacities, and are also suitable for occasions such as wine cabinets and the like with extremely high requirements on reliability and vibration.
Drawings
FIG. 1 is a schematic cross-sectional view of a cold head configuration and a split free piston Stirling cooler in an embodiment of the invention;
FIG. 2 is a schematic perspective cross-sectional view of a coldhead configuration in an embodiment of the present invention;
FIG. 3 is a schematic perspective view of a coldhead configuration in an embodiment of the present invention;
FIG. 4 is a schematic perspective view of a cold head structure coupled to a coiled heat pipe in an embodiment of the present invention;
FIG. 5 is a schematic perspective view of a connection manner between an intercooler structure and a straight-tube heat pipe according to a second embodiment of the present invention; and
fig. 6 is a schematic perspective cross-sectional view of a cooling structure in the third embodiment of the present invention.
Detailed Description
In order to make the technical means, the creation characteristics, the achievement purposes and the effects of the invention easy to understand, the following embodiments are combined with the accompanying drawings to specifically describe the cold head structure and the split type free piston stirling cryocooler of the invention.
Example one
As shown in fig. 1, the split type free piston stirling cooler 100 includes a compression part 200, an expansion part 300, and a pipe connection part 400.
The compression part 200 is composed of two linear compressors 210, two compression pistons 220, a compression chamber 230, a compressor back pressure chamber 240, upper and lower compressor housings 250, a compression cylinder and a heat sink 260, and a flange connection 270.
The two linear compressors 210 are composed of an inner yoke iron, a mover 211, a permanent magnet 212, a permanent magnet support 213, a coil frame 214, a coil 215 and an outer yoke iron 216. Wherein, there is the clearance between interior yoke 211 and outer yoke 216, and the active cell is set up in the clearance, and the active cell includes permanent magnet 212 and permanent magnet support 213. The outer yoke 216 and the inner yoke 211 are made of soft magnetic materials, such as electrically pure iron and silicon steel sheets, and the two permanent magnets 212 are made of permanent magnetic materials. The inner yoke 211, the permanent magnet 212, the permanent magnet holder 213, the bobbin 214, the coil 215, and the outer yoke 216 are all annular and are coaxially arranged.
When the coil is energized with a direct current, a magnetic loop is formed between the inner yoke 211 and the outer yoke 216, thereby creating magnetic poles on the inner yoke and the outer yoke 216. When the coil is supplied with an alternating current, the permanent magnet 212 is subjected to an alternating electromagnetic force to perform a reciprocating linear motion. When the permanent magnet 212 reciprocates, the compression piston 220 is driven to reciprocate, and the plate spring 224 provides axial reciprocating elastic force and radial support.
The interior of the compression piston 220 is hollow, a threaded hole 221 and a compression piston rod 222 are formed in the hollow interior close to the piston face, the opening at the tail of the compression piston 220 is in threaded connection with a connecting piece 223, the compression piston rod 222 is fixedly connected with a plate spring 224 through a central hole in the surface of the connecting piece 223, and the plate spring 224 is fixedly matched with a plate spring support 225 through a bolt. The plate spring support 225 and the compressor housing 250 are integrated, and are composed of 4 studs.
The compression chamber 230 is formed by two compression pistons 220 and a compression cylinder 260, which are coaxially and symmetrically disposed.
The upper and lower compressor housings 250 are coupled to the compression cylinder and the heat sink via a flange connection 270 to enclose the two compressor housings 250 and the compression chamber 230, which are coaxially and symmetrically disposed, to form a whole.
One end of the compression pipeline 401 is communicated with the compression cavity, the other end of the compression pipeline is communicated with the tee 404, the linear compressor 210 drives the rotor and the compression piston 210 to move through the compression piston rod 222 after being electrified, and the gas working medium flows to the compression pipeline 401 from the compression cavity 230 after being compressed by the compression piston 210.
The compression cylinder and the radiator 260 discharge the compression heat generated by the compression piston 210 compressing the gas working medium to the surrounding environment in time, thereby improving the working efficiency of the compressor.
The expansion part 300 is composed of two expander back pressure chambers 310, two expansion pistons 320, two regenerators 330, two expansion chambers 340, a slit heat exchanger 350, a heat pipe 360, an expander cylinder and housing 370, and a flange connection 380.
The expansion piston 320 is hollow, the opening at the rear part of the expansion piston 320 is in threaded connection with a connecting piece 321, the connecting piece 321 is in threaded connection with a spring 322, the spring 322 is in threaded connection with a spring support 323 for fixation, and the spring support 323 is fixed on the expansion machine shell 370 through a spring support bearing 324.
The regenerator 330 is in a ring cylinder shape, and is disposed outside the expansion piston 320 and inside the expander cylinder 370, with one end connected to the regenerator bearing 331 and the other end connected to the slit heat exchanger 360. The heat regenerator 330 is made of any one of polyester film, nylon and polytetrafluoroethylene material, and in the first embodiment, the heat regenerator 330 is made of polyester film, and the thickness of the polyester film is 20-50 μm.
As shown in fig. 2, the slit heat exchanger 350 and the expansion cylinder 370 outside the two expansion chambers 340 are coupled together by welding to form a new cold head structure.
In the embodiment, the pipe wall of the expansion cylinder 370 outside the expansion cavity 340 is thin-walled and made of stainless steel, the slit-type heat exchanger 350 is made of red copper and is cylindrical, a gap is formed between the expansion cylinder 370 and the slit-type heat exchanger 350, and the gap is filled with solder for welding. The internal surface of the slit-type heat exchanger 350 is provided with a plurality of slit-type grooves to enhance the heat transfer coefficient and enhance the cold conducting effect of the cold head. In an embodiment, the slit has a rectilinear shape, oriented parallel to the axis of the cylinder.
As shown in fig. 1, two expander back pressure chambers 310 and two expansion chambers 340 are coaxially and symmetrically arranged. The tail part of the expander shell 370 is provided with a flange connection 380, and the expansion part 300 can be connected and matched with an external fixing device through the flange connection 380, so that the vibration of the refrigerator is further reduced, and the stability is enhanced.
The pipe connection 400 includes a compression pipe 401, a first expansion pipe 402, a second expansion pipe 403, a three-way pipe 404, a first solenoid valve 405, and a second solenoid valve 406.
One end of the compression pipeline 401 is communicated with the compression cavity, the other end of the compression pipeline is communicated with the tee joint 404, the other two air holes of the tee joint 404 are respectively communicated with the first expansion pipeline 402 and the second expansion pipeline 403, the first electromagnetic valve 405 is arranged at the communication position of the tee joint 404 and the first expansion pipeline 402, the second electromagnetic valve 406 is arranged at the communication position of the tee joint 404 and the second expansion pipeline 403, and the first expansion pipeline 402 and the second expansion pipeline 403 are respectively communicated with the expander backpressure cavity 310.
Compressed gas is divided by a tee joint 404, enters the expander back pressure cavity 310 through a first expansion pipeline 402 and a second expansion pipeline 403 respectively, and pushes the expansion piston 320 to do reciprocating linear motion, and the spring 322 provides axial reciprocating elastic force and radial support. The compressed gas pushes the expansion piston 320 to move to the inlet of the heat regenerator 330, the heat is transferred to the heat regenerator 330 to be filled, then the expansion chamber 340 and the slit type heat exchanger 350 are expanded and refrigerated, the cold is transferred to the heat pipe 360 through the slit type heat exchanger 350, and the working medium in the heat pipe 360 transfers the cold to the part needing refrigeration.
As shown in fig. 3 and 4, the heat pipe 360 is a coil type pulsating heat pipe, and is disposed on the outer surface of the slit heat exchanger 350, and the pulsating heat pipe is a novel heat pipe, and has a simple structure, no core, a freely bendable shape, a large equivalent heat transfer coefficient, and a small volume.
Example two
The other structure of this embodiment is the same as that of the first embodiment, except that the slit heat exchanger 350 is shown in fig. 5, the slit heat exchanger 350 in this embodiment has a regular pentagonal prism shape, and the surface of the internal channel is still provided with slit grooves.
A plurality of heat pipes are arranged on each pentagonal prismatic surface respectively, the heat pipes still adopt pulsating heat pipes, the heat pipes are arranged in an inverted U shape, and the heat pipes transmit cold energy in a mode that 2 straight pipes are inserted into the surfaces of the slit type heat exchangers 350 in a cuttage mode.
In the embodiment, a plurality of U-shaped heat pipes are embedded and arranged on the same plane.
EXAMPLE III
The other structure of this embodiment is the same as the first embodiment, except that the internal channel structure of the slit heat exchanger 350 is different, as shown in fig. 6, a partition or an isolation layer 351 is disposed in the internal channel of the slit heat exchanger 350, so that the two ends of the internal channel of the slit heat exchanger 350 are completely isolated, the channels of the two ends of the slit heat exchanger 350 are not communicated, and the two expansion cavities 340 are not communicated with each other through the internal channel of the slit heat exchanger 350.
When the internal channels of the slit-type heat exchanger 350 are not communicated, the electromagnetic valves on the two expansion pipelines can be operated to control the flow of the working medium entering the two expansion cavities, so that the difference of the refrigerating capacities of the cold heads of the two expansion cavities is controlled, and the effect of different refrigerating temperatures at the two ends of the slit-type heat exchanger 350 is achieved.
Example four
The other structure of this embodiment is the same as that of the embodiment, except that the internal channel structure of the slit heat exchanger 350 is different, as shown in fig. 6, a partition or an isolation layer 351 is provided in the internal channel of the slit heat exchanger 350, so that the two ends of the internal channel of the slit heat exchanger 350 are completely isolated, the channels of the two ends of the slit heat exchanger 350 are not communicated, and the two expansion cavities 340 are not communicated with each other through the internal channel of the slit heat exchanger 350.
When the internal channels of the slit-type heat exchanger 350 are not communicated, the electromagnetic valves on the two expansion pipelines can be operated to control the flow of the working medium entering the two expansion cavities, so that the difference of the refrigerating capacities of the cold heads of the two expansion cavities is controlled, and the effect of different refrigerating temperatures at the two ends of the slit-type heat exchanger 350 is achieved.
Effects and effects of the embodiments
According to the cold head structure and the split type free piston Stirling refrigerator related to the embodiment, the expansion cylinder thin walls outside the two expansion cavities and the slit type heat exchanger are welded together to form the novel cold head through the cold head structure, so that the vibration of the expansion machine of the traditional split type free piston Stirling refrigerator is reduced, and the stability and the reliability of the refrigerator are greatly improved.
In addition, the expansion machine adopts two expansion pistons which are coaxially and symmetrically arranged, and the two expansion cavities and the slit type heat exchanger are coupled together in a welding mode, so that the axial force can be maximally balanced, the vibration is greatly reduced, and the reliability is enhanced.
Furthermore, the pulsating heat pipe is used as a heat pipe, the structure is simple, the core is not needed, the shape can be bent at will, the equivalent heat transfer coefficient is large, the volume is small, and the pulsating heat pipe is a heat transfer element with high heat flow density, miniaturization and low cost.
Further, the compressor adopts two compression pistons which are coaxially and symmetrically arranged, so that the vibration of the compressor is reduced.
Furthermore, in the embodiment, one opposite linear compressor is used for providing pressure waves for the two coaxially and symmetrically arranged expansion machines, and the working states of the two coaxially and symmetrically arranged expansion cavities are controlled by opening and closing the valves, so that the expansion machine has the advantages of high efficiency, high reliability, low vibration and the like.
Furthermore, the pulsating heat pipe and the cold head are selected to be combined, so that the advantages of high heat flow density, small volume and random bending of the pulsating heat pipe are effectively utilized, and the effective transmission of cold energy is ensured.
Furthermore, the opening and closing of the electromagnetic valves on the two expansion pipelines can control the working state of the expansion cavity, so that different refrigeration temperatures and refrigeration capacities are realized, and the expansion pipeline is suitable for occasions with strict requirements on vibration, such as aerospace, chateau and the like.
Compared with the traditional split type free piston Stirling refrigerator, the cold head structure and the split type free piston Stirling refrigerator have the advantages of small vibration, high stability and the like, are suitable for the aerospace application field needing different refrigeration temperatures and refrigeration capacity, and are also suitable for occasions such as wine cabinets and the like with extremely high requirements on reliability and vibration.
The above embodiments are preferred examples of the present invention, and are not intended to limit the scope of the present invention.
Claims (8)
1. A cold head structure for a split free piston Stirling refrigerator, comprising:
the slit type heat exchanger is cylindrical;
the two expansion cavities are coaxially and symmetrically arranged and are positioned at two ends of the slit type heat exchanger; and
a heat pipe arranged on the surface of the slit type heat exchanger,
wherein the inner wall of the slit type heat exchanger is provided with a plurality of linear slit type grooves,
the two expansion cavities at the two ends are communicated through the slit type heat exchanger,
the heat pipe is a coil pipe type pulsating heat pipe, and an expansion cylinder wall pipe on the outer side of the expansion cavity is coupled with the slit type heat exchanger in a welding mode.
2. A split type free piston Stirling refrigerator is characterized in that:
comprising the coldhead structure of claim 1.
3. The split free-piston stirling cooler of claim 2 further comprising:
the compression part is provided with a compression cylinder, two compression pistons which are coaxially and symmetrically arranged are arranged in the compression cylinder, and the two compression pistons and the compression cylinder form a compression cavity.
4. The split free-piston stirling cooler of claim 3 further comprising:
the expansion part is provided with two expansion cylinders, the two expansion cylinders are provided with two coaxially and symmetrically arranged expansion pistons, and the two expansion pistons and the two expansion cylinders form two expansion cavities.
5. The split free-piston stirling cooler of claim 4, wherein:
wherein the compression part comprises two compression pistons, two compression piston rods, two compression piston connecting pieces, two linear motors, two plate springs and two plate spring brackets which are coaxially and symmetrically arranged in the compression cylinder,
the compression piston is hollow, the tail of the compression piston is connected with the compression piston connecting piece, the compression piston rod is arranged in the compression piston connecting piece, one end of the piston rod is connected with the top of the compression piston, and the other end of the piston rod is connected with the plate spring.
6. The split free-piston stirling cooler of claim 5 wherein:
wherein the expansion part comprises two expansion pistons coaxially and symmetrically arranged in the two expansion cylinders, two regenerators, two expansion piston connecting pieces and two springs,
the heat regenerator is in an annular cylinder shape and is made of polyester films,
the expansion piston is hollow, an opening at the tail of the expansion piston is connected with the expansion piston connecting piece, one end of the spring is connected with the expansion piston connecting piece, and the other end of the spring is connected with the spring support.
7. The split free-piston stirling cooler of claim 2 further comprising:
the pipeline connecting part is provided with a compression pipeline, two expansion pipelines, a tee joint for communicating the compression pipeline and the two expansion pipelines and two electromagnetic valves,
wherein the solenoid valve is arranged at the interface of the tee joint and the expansion pipeline.
8. The split free-piston stirling cooler of claim 3 further comprising:
a compression cylinder radiator disposed outside the compression chamber,
and the compression cylinder radiator performs heat convection with the ambient environment, and discharges the compression heat generated in the compression cavity.
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| JP2004205088A (en) * | 2002-12-25 | 2004-07-22 | Sumitomo Heavy Ind Ltd | Regenerative refrigerator |
| WO2010139319A3 (en) * | 2009-06-05 | 2011-03-24 | Danfoss Compressors Gmbh | Stirling cooling arrangement |
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| CN106052258A (en) * | 2016-07-21 | 2016-10-26 | 上海理工大学 | Refrigerator having multiple temperature zones |
| CN106766502A (en) * | 2016-11-22 | 2017-05-31 | 上海理工大学 | The temperature-varying zone refrigerator of the stirling refrigeration of detachable one two |
| CN106595121A (en) * | 2016-11-28 | 2017-04-26 | 上海理工大学 | Single compressor-driven multi-temperature area mixed refrigerating system |
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