CN109059330A - A kind of piston phase modulation type vascular refrigerator by spring connect compressor piston - Google Patents
A kind of piston phase modulation type vascular refrigerator by spring connect compressor piston Download PDFInfo
- Publication number
- CN109059330A CN109059330A CN201810770983.5A CN201810770983A CN109059330A CN 109059330 A CN109059330 A CN 109059330A CN 201810770983 A CN201810770983 A CN 201810770983A CN 109059330 A CN109059330 A CN 109059330A
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- Prior art keywords
- piston
- phase modulation
- vascular
- compressor
- heat exchanger
- Prior art date
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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
- 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
-
- 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
- F25B2309/1411—Pulse-tube cycles characterised by control details, e.g. tuning, phase shifting or general control
Abstract
The invention discloses a kind of piston phase modulation type vascular refrigerators by spring connect compressor piston, including compressor module, pulse tube refrigeration module and phase modulation module, the compressor module includes back pressure cavity, compressor piston and compression chamber, the pulse tube refrigeration module includes the regenerator hot end heat exchanger being sequentially communicated, regenerator, cool end heat exchanger, vascular and vascular hot-side heat exchanger, the compression chamber is connected to regenerator hot end heat exchanger, the phase modulation module includes: expansion chamber, part is connected to the compression chamber, another part is connected to the vascular hot-side heat exchanger；Phase modulation piston is mounted in the expansion chamber, and seal clearance is equipped between the expansion cavity wall；Flexible connector, both ends are separately connected compressor piston and phase modulation piston；The recycling that the present invention can realize expansion work in vascular by the movement and deformation of flexible connector and phase modulation piston improves the efficiency of vascular refrigerator and keeps reliability and long-life without increasing low temperature movement component.
Description
Technical field
The present invention relates to Cryo Refrigerator technical field, in particular to a kind of piston tune by spring connect compressor piston
Facies pattern vascular refrigerator.
Background technique
With the development of modern science and technology, the application demand sustainable growth of cryogenic technique, especially in space technology, superconduction
The fields such as electric power, infrared acquisition, Medical Instruments.Vascular refrigerator has simple and compact for structure, vibration because of its cold end movement-less part
Move the advantages that small, high reliablity and service life are long, it has also become most application prospect and the Cryo Refrigerator being widely studied.
Studies have shown that in vascular refrigerator the phase difference of pressure wave and working medium volume flow to the refrigeration performance of refrigeration machine very
It is important.When regenerator near middle pressure wave with volume flow with phase when, regenerator loss reduction, vascular refrigerator refrigeration performance compared with
It is high.Therefore, it is necessary to make about 60 ° of phase-lead volume flow of pressure wave in vascular hot end, and in certain pressure wave amplitude
Under, volume flow reaches certain range.Compared to G-M refrigeration machine and sterlin refrigerator, vascular refrigerator does not have displacer knot
Structure needs to carry out phase modulation by the additional phase modulating mechanism such as Hole and air reservoir, bidirection air intake, inertia tube.But the above phase modulating mechanism
The expansion work in vascular can not be recycled, the expansion work of the part will be consumed in vascular hot end and phase modulating mechanism in the form of heat
It dissipates, so that the efficiency of vascular refrigerator is less than sterlin refrigerator.In addition, for the small-power pulse tube refrigeration to work at low temperature
Machine, the inertia that can be provided using modes such as Hole and air reservoir, bidirection air intake and inertia tubes is too small, and viscous drag loss is larger, difficult
To reach required phase angle.And the above phase modulating mechanism introduces the components such as air reservoir, increases refrigeration machine volume and gas consumption.
Such as notification number discloses band for the patent document of CN103047789B, CN106568222A and CN106440448A
The vascular refrigerator of dynamic quality module or pushing piston phase modulation apparatus, principle are adjusted by dynamic quality module or pushing piston
Phase forms higher phase angle, improves refrigeration performance.
But the component that above structure has vascular refrigerator additional introduces, so that system is more complicated, and dynamic quality module
Or the forms of motion of pushing piston is driven by gas compression and expansion, it is difficult to be controlled or regulated.
Summary of the invention
The present invention provides a kind of piston phase modulation type vascular refrigerators by spring connect compressor piston, are connected using spring
Compressor piston and phase modulation piston are connect, the reciprocating motion control phase modulation piston of compressor piston is back and forth transported when passing through operation
It is dynamic, the phase difference between pressure wave and volume flow is adjusted, phase modulation is optimized, vascular hot end sound function is recycled, improves vascular refrigerator
Refrigeration performance.
A kind of piston phase modulation type vascular refrigerator by spring connect compressor piston, including compressor module, vascular system
Cold module and phase modulation module, the compressor module include back pressure cavity, compressor piston and compression chamber, the pulse tube refrigeration mould
Block includes regenerator hot end heat exchanger, regenerator, cool end heat exchanger, vascular and the vascular hot-side heat exchanger being sequentially communicated, described
Compression chamber is connected to regenerator hot end heat exchanger, and the phase modulation module includes:
Expansion chamber, a part of to be connected to the compression chamber, another part is connected to the vascular hot-side heat exchanger；
Phase modulation piston is mounted in the expansion chamber, and seal clearance is equipped between the expansion cavity wall；
Flexible connector, both ends are separately connected compressor piston and phase modulation piston so that compressor piston driving phase modulation is living
Plug.
In above structure, the phase modulation piston is placed in expansion chamber, has seal clearance between expansion cavity wall, the gap
Play the role of sealing function and isolation phase modulation piston two sides gas simultaneously, phase modulation piston side is expansion chamber, and the other side is pressure
Contracting chamber.
Flexible connector can use flexible multiple material, for the ease of regulation and control, it is preferred that the bullet
Property connector be spring.Spring structure is simple, and deflection is easy measurement and calculates, while being convenient for regulation and control.
In order to keep the structure of refrigeration machine simpler, convenient for manufacture, it is preferred that the compressor module uses linear compression
Machine, the compressor piston carry out linear reciprocal movement and phase modulation piston are driven to carry out linear reciprocal movement.Linear movement is more just
In manufacture, it is also easier to control and adjusts.
In order to make the more compact structure of refrigeration machine, it is preferred that the vascular and regenerator are coaxially arranged.Above-mentioned setting can be with
Reduce lateral volume, makes compact-sized.
In order to further make the more compact structure of refrigeration machine, it is preferred that the regenerator hot end heat exchanger is cyclic structure,
The installation expansion chamber in ring.Expansion chamber is arranged in the regenerator hot end heat exchanger, overall volume is reduced, it is more compact.
In order to further make the more compact structure of refrigeration machine, it is preferred that the regenerator is cyclic structure, installs institute in ring
State vascular.
In order to further make the more compact structure of refrigeration machine, it is preferred that the movement of the compressor piston and phase modulation piston
Track is coaxial.Above-mentioned setting is not required to additional connecting leg, compact-sized.
The compressor module can use single cylinder compressor, include single back pressure cavity, compressor piston, phase modulation module packet
Containing single phase modulation piston, expansion chamber be can be directly mounted on vascular hot-side heat exchanger.
For the ease of manufacturing and installing, it is preferred that the vascular and regenerator are arranged in parallel.There is no mutually nested, manufacture
Simpler, installation is more convenient.
In order to reduce vibration when work, it is preferred that the compressor module use opposed double-piston compression structure, two
Piston is positioned opposite.Two compressor pistons of opposed double-piston compression structure work at the same time, and can cancel out each other partial vibration.
To further simplify the structure, keep refrigeration machine more compact, it is preferred that the phase modulation module includes:
Single expansion chamber has the first expansion arc and the second expansion arc being connected to two compression chambers；
Two phase modulation pistons, are separately mounted in the first expansion arc and the second expansion arc, and pass through flexible connector respectively
It is connected with corresponding compressor piston.Compression chamber and expansion chamber by connecting leg respectively with regenerator hot end heat exchanger and vascular hot end
Heat exchanger connection.
When vascular refrigerator work of the invention, compressor module operation, compressor piston makees linear reciprocal movement, and
Constantly compression and extension spring, the phase modulation piston connected by spring makees linear reciprocal movement simultaneously in sealing wall surface, because of bullet
Spring and phase modulation piston generate impedance:
R, M, K, ω, A are respectively mechanical damping, phase modulation piston mass, spring rate, angular frequency and phase modulation piston in formula
Area.Δ p is the pressure difference of compression chamber and expansion chamber, and Δ U is the difference of the volume flow rate of working medium in compression chamber and expansion chamber.Cause
This, the movement of the compressor piston and phase modulation piston that are connected by spring is so that pressure wave and quality in compression chamber and expansion chamber
It is different to flow phase difference.By changing the rigidity and damping, phase modulation piston mass and area of spring, the resistance can be adjusted on a large scale
It is anti-, to adjust the phase difference of pressure wave and quality stream, meet the phase modulation requirement of vascular refrigerator.
The efficiency COP of vascular refrigerator is the refrigerating capacity Q of cool end heat exchangercWith the input work W of compressor modulecompThe ratio between.
The vascular refrigerator without expansion work recycling of the prior art, expansion work will be in vascular hot-side heat exchanger and phase modulating mechanism (small ports valve
Or inertia tube and air reservoir) dissipated in the form of heat, therefore the intrinsic conversion efficiency of vascular refrigerator are as follows:
T in formulacFor cryogenic temperature, ThFor environment temperature.
And the piston phase modulation type vascular refrigerator of the invention by spring connect compressor piston, spring and phase modulation piston can
With in vascular stage gas compression work done during compression is stored by deformation, gas expansion stage is by the work done during compression of storage in vascular
Release, thus realize the recycling of expansion work in vascular, vascular system similar with the sterlin refrigerator containing low temperature displacer
The intrinsic conversion efficiency of cold can be improved are as follows:
Beneficial effects of the present invention:
(1) flexible connector connect compressor piston and phase modulation piston are used, drives phase modulation piston using compressor piston,
And the phase of phase modulation piston is controlled with flexible connector, it realizes Active phasing, increases phase modulation range, improve the system of vascular refrigerator
Cold performance.
(2) phase modulation module is directly connected to compressor module, eliminates inertia tube in the prior art, bidirection air intake, small
The phase modulating mechanisms such as hole and air reservoir, and movement-less part under low temperature, so that vascular refrigerator is more compact, it is small in size.
(3) movement and deformation of flexible connector and phase modulation piston can realize that the recycling of expansion work in vascular is low without increasing
Warm moving component improves the efficiency of vascular refrigerator and keeps reliability and long-life.
Detailed description of the invention
Fig. 1 is that the structure of the piston phase modulation co-axial pulse tube refrigerator by spring connect compressor piston of embodiment 1 is shown
It is intended to.
Fig. 2 is the structural schematic diagram that the compressor module of embodiment 1 is connect with phase modulation module.
Fig. 3 is the structural representation of the U-shaped vascular refrigerator of piston phase modulation by spring connect compressor piston of embodiment 2
Figure.
Fig. 4 is that the structure of the piston phase modulation co-axial pulse tube refrigerator by spring connect compressor piston of embodiment 3 is shown
It is intended to.
Fig. 5 is the structural representation of the U-shaped vascular refrigerator of piston phase modulation by spring connect compressor piston of embodiment 4
Figure.
Wherein: 1, compressor module, 2, phase modulation module, 3, regenerator hot end heat exchanger, 4, vascular hot-side heat exchanger, 5, return
Hot device, 6, vascular, 7, cool end heat exchanger, 8, back pressure cavity, 9, compressor piston, 10, compression chamber, 11, expansion chamber, 12, phase modulation work
Plug, 13, seal clearance, 14, spring, 15, connecting leg.
Specific embodiment
Embodiment 1
As illustrated in fig. 1 and 2, the piston phase modulation co-axial pulse tube refrigerator by spring connect compressor piston of the present embodiment
Including compressor module 1, regenerator hot end heat exchanger 3, regenerator 5, cool end heat exchanger 7, the vascular 6, vascular heat being sequentially communicated
Hold heat exchanger 4 and phase modulation module 2.
Wherein, compressor module 1 includes back pressure cavity 8, compressor piston 9 and compression chamber 10.Phase modulation module 2 includes expansion chamber
11, phase modulation piston 12, seal clearance 13 and spring 14.Compression chamber 10 is connected to regenerator hot end heat exchanger 3, expansion chamber 11 and arteries and veins
Pipe hot end heat exchanger 4 is connected to.Spring 14 is located in compression chamber 10, connect compressor piston 9 and phase modulation piston 12.
Phase modulation piston 12 is placed in expansion chamber 11, there is seal clearance 13 between the wall surface of expansion chamber 11, for reducing rubbing
It wipes, and forms sealing, completely cut off the gas in expansion chamber 11 and the gas in compression chamber 10.
Compressor module 1, phase modulation module 2, vascular 6 and regenerator 5 are coaxially arranged in the present embodiment.Regenerator 5 and backheat
Device hot end heat exchanger 3 is ring-type, is expansion chamber 11 in the ring of regenerator hot end heat exchanger 3.Vascular 6 in the ring of regenerator 5.
Embodiment 2
As shown in figure 3, the U-shaped vascular refrigerator of piston phase modulation by spring connect compressor piston of the present embodiment, backheat
Device 5 and vascular 6 are arranged in parallel, and are connected to by cool end heat exchanger 7, expansion chamber 11 is connected to vascular hot-side heat exchanger 4, compression chamber 10
It is connected to by connecting leg 15 with regenerator hot end heat exchanger 3.Remaining structure is all same as Example 1.
Embodiment 3
As shown in figure 4, the piston phase modulation co-axial pulse tube refrigerator by spring connect compressor piston of the present embodiment, is returned
Hot device 5 and vascular 6 are coaxially arranged.Compressor module 1 back pressure cavity 8 and two compressor pistons 9 containing there are two, and be arranged symmetrically.
The phase modulation piston 12 containing there are two of phase modulation module 2, is connect with two compressor pistons 9 respectively by spring 14.Compression chamber 10 with return
Hot device hot end heat exchanger 3 is connected to, and expansion chamber 11 is connected to by connecting leg 15 with vascular hot-side heat exchanger 4.Remaining all with 1 phase of embodiment
Together.
Embodiment 4
As shown in figure 5, the U-shaped vascular refrigerator of piston phase modulation by spring connect compressor piston of the present embodiment, backheat
Device 5 and vascular 6 are arranged in parallel, compressor module 1 back pressure cavity 8 and two compressor pistons 9 containing there are two, and are arranged symmetrically.It adjusts
The phase modulation piston 12 containing there are two of phase module 2, is connect with two compressor pistons 9 respectively by spring 14.Compression chamber 10 passes through company
Pipe 15 is connected to regenerator hot end heat exchanger 3, and expansion chamber 11 is connected to by connecting leg 15 with vascular hot-side heat exchanger 4.Remaining all with
Embodiment 1 is identical.
When above-mentioned refrigerator operation, compressor piston 9 carries out linear reciprocal movement, generates pressure wave and moves back and forth
Quality stream.Gas working medium is compressed and is expanded in vascular 6, and refrigerating capacity is generated at cool end heat exchanger 7.
The movement of compressor piston so that spring 14 is compressed and is stretched, drive phase modulation piston 12 in expansion chamber 11 into
Row moves back and forth, and changes pressure wave and quality stream in expansion chamber.Since spring 14 and phase modulation piston 12 generate impedance:
R, M, K, ω, A are respectively mechanical damping, phase modulation piston mass, spring rate, angular frequency and phase modulation piston in formula
Area.Δ p is the pressure difference of compression chamber and expansion chamber, and Δ U is the difference of the volume flow rate of working medium in compression chamber and expansion chamber.
Therefore, the movement of the compressor piston 9 and phase modulation piston 12 that are connected by spring 14 is so that compression chamber 10 and expansion
The phase difference between pressure wave and quality stream in chamber 11 is different.By the rigidity and damping, phase modulation piston 12 that change spring 14
Quality and area can adjust the impedance to adjust the phase difference of pressure wave and quality stream on a large scale and meet pulse tube refrigeration
The phase requirements of machine improve refrigeration performance.
Meanwhile spring 14 and phase modulation piston 12 stage gas compression can store work done during compression by deformation in vascular 6,
Gas expansion stage discharges the work done during compression of storage in vascular 6, to realize the recycling of expansion work in vascular, vascular refrigerator
Intrinsic conversion efficiency when can be by non-recovery functionIt increases toT in formulacFor cryogenic temperature, ThFor ring
Border temperature.
The present invention is not limited to the above embodiments, and those skilled in the art's announcement according to the present invention does not depart from model of the present invention
The improvement and modification that farmland is made all should be within protection scope of the present invention.
Claims (10)
1. a kind of piston phase modulation type vascular refrigerator by spring connect compressor piston, including compressor module, pulse tube refrigeration
Module and phase modulation module, the compressor module include back pressure cavity, compressor piston and compression chamber, the pulse tube refrigeration module
Including regenerator hot end heat exchanger, regenerator, cool end heat exchanger, vascular and the vascular hot-side heat exchanger being sequentially communicated, the pressure
Contracting chamber is connected to regenerator hot end heat exchanger, which is characterized in that the phase modulation module includes:
Expansion chamber, a part of to be connected to the compression chamber, another part is connected to the vascular hot-side heat exchanger；
Phase modulation piston is mounted in the expansion chamber, and seal clearance is equipped between the expansion cavity wall；
Flexible connector, both ends are separately connected compressor piston and phase modulation piston so that compressor piston drives phase modulation piston.
2. as described in claim 1 by the piston phase modulation type vascular refrigerator of spring connect compressor piston, which is characterized in that
The flexible connector is spring.
3. as described in claim 1 by the piston phase modulation type vascular refrigerator of spring connect compressor piston, which is characterized in that
The compressor module uses Linearkompressor, and the compressor piston carries out linear reciprocal movement and phase modulation piston is driven to carry out
Linear reciprocal movement.
4. as described in claim 1 by the piston phase modulation type vascular refrigerator of spring connect compressor piston, which is characterized in that
The vascular and regenerator are coaxially arranged.
5. as claimed in claim 4 by the piston phase modulation type vascular refrigerator of spring connect compressor piston, which is characterized in that
The regenerator hot end heat exchanger is cyclic structure, the installation expansion chamber in ring.
6. as claimed in claim 4 by the piston phase modulation type vascular refrigerator of spring connect compressor piston, which is characterized in that
The regenerator is cyclic structure, the installation vascular in ring.
7. as described in claim 1 by the piston phase modulation type vascular refrigerator of spring connect compressor piston, which is characterized in that
The motion profile of the compressor piston and phase modulation piston is coaxial.
8. as described in claim 1 by the piston phase modulation type vascular refrigerator of spring connect compressor piston, which is characterized in that
The vascular and regenerator are arranged in parallel.
9. as described in claim 1 by the piston phase modulation type vascular refrigerator of spring connect compressor piston, which is characterized in that
The compressor module uses opposed double-piston compression structure, and two pistons are positioned opposite.
10. as claimed in claim 9 by the piston phase modulation type vascular refrigerator of spring connect compressor piston, feature exists
In the phase modulation module includes:
Single expansion chamber has the first expansion arc and the second expansion arc being connected to two compression chambers；
Two phase modulation pistons, are separately mounted in the first expansion arc and the second expansion arc, and respectively by flexible connector with it is right
The compressor piston connection answered.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810770983.5A CN109059330B (en) | 2018-07-13 | 2018-07-13 | Piston phase modulation type pulse tube refrigerator with piston of compressor connected by spring |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810770983.5A CN109059330B (en) | 2018-07-13 | 2018-07-13 | Piston phase modulation type pulse tube refrigerator with piston of compressor connected by spring |
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| Publication Number | Publication Date |
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| CN109059330A true CN109059330A (en) | 2018-12-21 |
| CN109059330B CN109059330B (en) | 2020-08-18 |
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| CN201810770983.5A Active CN109059330B (en) | 2018-07-13 | 2018-07-13 | Piston phase modulation type pulse tube refrigerator with piston of compressor connected by spring |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111207529A (en) * | 2020-01-15 | 2020-05-29 | 浙江大学 | Free piston engine direct drive's cryocooler |
| CN111238076A (en) * | 2020-01-09 | 2020-06-05 | 上海理工大学 | Arrangement structure of pulse tube refrigerator push piston |
| CN113074470A (en) * | 2021-05-12 | 2021-07-06 | 中国科学院上海技术物理研究所 | Pulse tube refrigerator with low-temperature cavity structure |
| CN113074468A (en) * | 2021-04-13 | 2021-07-06 | 中国科学院上海技术物理研究所 | Pulse tube refrigerator system with single piston phase modulation and vibration reduction method thereof |
| CN113154715A (en) * | 2021-04-13 | 2021-07-23 | 中国科学院上海技术物理研究所 | Coaxial active phase modulation power recovery pulse tube refrigerator |
| CN114630995A (en) * | 2019-07-29 | 2022-06-14 | 冷冻科技有限公司 | Cryogenic stirling cooler with pneumatic expander |
| CN114739040A (en) * | 2022-03-11 | 2022-07-12 | 上海铂钺制冷科技有限公司 | Pulse tube refrigerator for realizing active phase modulation by adopting single compressor |
| CN115289713A (en) * | 2021-09-14 | 2022-11-04 | 中国科学院上海技术物理研究所 | Active piston phase modulation power recovery integrated pulse tube refrigerator supported by column spring |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN114630995A (en) * | 2019-07-29 | 2022-06-14 | 冷冻科技有限公司 | Cryogenic stirling cooler with pneumatic expander |
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| CN113074468A (en) * | 2021-04-13 | 2021-07-06 | 中国科学院上海技术物理研究所 | Pulse tube refrigerator system with single piston phase modulation and vibration reduction method thereof |
| CN113154715A (en) * | 2021-04-13 | 2021-07-23 | 中国科学院上海技术物理研究所 | Coaxial active phase modulation power recovery pulse tube refrigerator |
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| CN113074470B (en) * | 2021-05-12 | 2024-03-26 | 中国科学院上海技术物理研究所 | Pulse tube refrigerator with low-temperature cavity structure |
| CN115289713A (en) * | 2021-09-14 | 2022-11-04 | 中国科学院上海技术物理研究所 | Active piston phase modulation power recovery integrated pulse tube refrigerator supported by column spring |
| CN114739040A (en) * | 2022-03-11 | 2022-07-12 | 上海铂钺制冷科技有限公司 | Pulse tube refrigerator for realizing active phase modulation by adopting single compressor |
| CN114739040B (en) * | 2022-03-11 | 2023-12-01 | 上海铂钺制冷科技有限公司 | Pulse tube refrigerator for realizing active phase modulation by adopting single compressor |
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