CN108444131A - A kind of regenerator and its manufacturing method, acoustic energy refrigeration machine and the course of work for acoustic energy refrigeration machine - Google Patents
A kind of regenerator and its manufacturing method, acoustic energy refrigeration machine and the course of work for acoustic energy refrigeration machine Download PDFInfo
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- CN108444131A CN108444131A CN201810311668.6A CN201810311668A CN108444131A CN 108444131 A CN108444131 A CN 108444131A CN 201810311668 A CN201810311668 A CN 201810311668A CN 108444131 A CN108444131 A CN 108444131A
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- regenerator
- heat exchanger
- acoustic energy
- refrigeration machine
- end heat
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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
-
- 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
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- Physics & Mathematics (AREA)
- Mechanical Engineering (AREA)
- Thermal Sciences (AREA)
- General Engineering & Computer Science (AREA)
Abstract
The present invention relates to the present invention relates to the component of acoustic energy refrigeration machine, especially a kind of regenerator and its manufacturing method, acoustic energy refrigeration machines and the course of work for acoustic energy refrigeration machine.Acoustic energy refrigeration machine includes upper casing, expansion cylinder, hot end heat exchanger, cool end heat exchanger, compression chamber and expansion chamber, regenerator is polytetrafluoroethylene (PTFE) through ring-shaped cylinder shape structure made of high temperature, high-pressure sinter, the compression chamber and expansion chamber of acoustic energy refrigeration machine are located at the bottom end and top of expansion cylinder, regenerator, hot end heat exchanger, cool end heat exchanger are surrounded on outside expansion cylinder, it is close on the inside of regenerator outer ring surface and upper casing, it is close on the outside of inner ring surface and expansion cylinder, lower end resists hot end heat exchanger, and upper end resists cool end heat exchanger.The regenerator for acoustic energy refrigeration machine of the present invention has many advantages, such as that porosity height, large specific surface area, strength and toughness are high, the backheat performance of acoustic energy refrigeration machine can be made to be substantially improved, and simple with final assembly, improves efficiency of assembling.
Description
Technical field
The present invention relates to the component of acoustic energy refrigeration machine, especially a kind of regenerators and its manufacturer for acoustic energy refrigeration machine
Method, acoustic energy refrigeration machine and the course of work.
Background technology
Acoustic energy refrigeration machine as a kind of small-sized low temperature philip refrigerator, using gases cycle expansion in expansion cylinder and
It compresses to produce cold, has many advantages, such as that compact-sized, refrigeration temperature area is wide, high cooling efficiency, energy conservation and environmental protection, receive increasingly
More attention.Due to carrying out heat exchange by same flow channel space after gas expansion and compression, acoustic energy refrigeration machine is a kind of
Back-heating type acoustic energy refrigeration machine.
Regenerator is the critical component of back-heating type acoustic energy refrigeration machine, undertakes the task of cyclical heat transmission between cold and hot fluid.With
The characteristics of traditional heat exchanger is different, regenerator are that cold and hot fluid flows alternately through same flow channel space, by with regeneration filler
Be in direct contact realization heat exchange.And in traditional heat exchanger, the runner of hot and cold two fluids is separated, fluid
Between conducted heat by separating wall surface, therefore also referred to as dividing wall type heat exchanger.
From the aspects of thermodynamic efficiency, the heat recovery process realized using regenerator can improve the heating power of refrigeration cycle
Efficiency.In the Cryo Refrigerator course of work, regenerator accumulates last cycle gained cold periodically, and passes it to down
The working medium that becomes a mandarin of one cycle takes full advantage of the refrigerating capacity of different potential temperatures in process of refrigerastion, improves the utilization rate of energy.
Invention content
The present invention provides a kind of for the regenerator of acoustic energy refrigeration machine, its course of work and manufacturing method, can substantially carry
The backheat performance of acoustic energy refrigeration machine is risen, the refrigerating efficiency of acoustic energy refrigeration machine is improved.
The technical scheme is that：
A kind of regenerator for acoustic energy refrigeration machine, the acoustic energy refrigeration machine include upper casing, expansion cylinder, hot junction heat exchange
Device, cool end heat exchanger, compression chamber and expansion chamber, the regenerator are polytetrafluoroethylene (PTFE) through annular made of high temperature, high-pressure sinter
Cylindrical-shaped structure, the compression chamber and expansion chamber of the acoustic energy refrigeration machine are located at the bottom end and top of expansion cylinder, described time
Hot device, hot end heat exchanger, cool end heat exchanger are surrounded on outside expansion cylinder, and the inside of the regenerator outer ring surface and upper casing is tight
It pastes, is close on the outside of inner ring surface and expansion cylinder, lower end resists hot end heat exchanger, and upper end resists cool end heat exchanger.
The internal diameter of the regenerator is 37.6mm-39.6mm, one-sided thickness 4mm-8mm.
The length of the regenerator is 55mm-62mm.
The porosity of the regenerator is 30%-80%.
A kind of manufacturing method of regenerator, includes the following steps：
Step 1：Heating firing is carried out to polytetrafluoroethylene (PTFE) shape base by certain heating rate, until rising to sintering temperature；
Step 2：Heat preservation a period of time at a sintering temperature；
Step 3：The molded polytetrafluoroethylarticle object sintered is down to room temperature cooling from sintering temperature.
The heating rate of the step 1 is 35 DEG C/h-45 DEG C/h, and sintering temperature is 380 DEG C -390 DEG C.
The heat preservation of the step 2 is to keep the temperature 1 hour at a temperature of 380 DEG C~385 DEG C.
The step 3 is cooled to, and molded polytetrafluoroethylarticle object is first cooled to 150 DEG C, is further taken out and is put in asbestos case
It is cooled to room temperature.
A kind of acoustic energy refrigeration machine, including upper casing, expansion cylinder, hot end heat exchanger, cool end heat exchanger, compression chamber and expansion
Chamber further includes regenerator, and the compression chamber and expansion chamber are located at the bottom end and top of expansion cylinder, the regenerator, heat
End heat exchanger, cool end heat exchanger are surrounded on outside expansion cylinder, are close on the inside of the regenerator outer ring surface and upper casing, inner ring
It is close on the outside of face and expansion cylinder, lower end resists hot end heat exchanger, and upper end resists cool end heat exchanger.
A kind of course of work of acoustic energy refrigeration machine, includes the following steps：
Step 1：Working medium gas in compression chamber generates heat after being compressed, by hot end heat exchanger, by the heat of generation
It is released to external environment through hot end heat exchanger；
Step 2：Working medium gas is cooled when flowing through regenerator, and heat is transmitted to regenerator, the temperature, pressure of Working medium gas
Decline；
Step 3：Working medium gas enters expansion chamber swell refrigeration, exports cold by cool end heat exchanger；
Step 4：It is heated when Working medium gas flows back to regenerator, absorbs the heat in regenerator, the temperature pressure of Working medium gas
Power rises, and returns to compression chamber continuation and is compressed；
Step 5：The above steps are repeated one to four, and Working medium gas is compressed and expansion by cycle, continuous cooling.
In technical scheme of the present invention：Regenerator is using pure polytetrafluoroethylene (PTFE) as raw material, through high temperature, high-pressure sinter at polytetrafluoro
Ethylene is sintered core, which has many advantages, such as that porosity height, large specific surface area, strength and toughness are high, as returning for acoustic energy refrigeration machine
Hot device can be such that backheat performance is substantially improved.
Technical scheme of the present invention has the advantages that：
1, regenerator is that polytetrafluoroethylene (PTFE) burning is integrally sintered, simple with final assembly；
2, sintering polytetrafluoroethylene core has high porosity, effectively reduces Working medium gas flow resistance；
3, sintering polytetrafluoroethylene core has larger specific surface area, increases the contact heat-exchanging of regenerator and Working medium gas
Area promotes regenerator backheat performance.
4, the thermal coefficient very little of sintering polytetrafluoroethylene core is conducive to the axial heat conduction loss for reducing regenerator.
Description of the drawings
Fig. 1 is sectional view of the present invention for the regenerator of acoustic energy refrigeration machine；
Fig. 2 is axonometric drawing of the present invention for the regenerator of acoustic energy refrigeration machine；
Fig. 3 is the configuration diagram of acoustic energy refrigeration machine of the present invention.
Specific implementation mode
The technique effect of the design of the present invention, concrete structure and generation is described further below with reference to attached drawing, with
It is fully understood from the purpose of the present invention, feature and effect.
As depicted in figs. 1 and 2, regenerator 1 is made by polytetrafluoroethylene (PTFE), and pure polytetrafluoroethylene (PTFE) is through high temperature, high pressure combustion
Form annular cylindrical-shaped structure sintering core, the internal diameter Di for being sintered core is 37.6mm~39.6mm, and length L is 55mm~62mm, hole
Gap rateIt is 30%~80%, one-sided thickness W is 4mm-8mm.
The preparation process of regenerator 1 is as follows：
Step 1：Heating firing is carried out to polytetrafluoroethylene (PTFE) shape base by certain heating rate, until rising to sintering temperature；
The length thickness of acoustic energy refrigeration machine regenerator 1 is less than normal, so heating rate is usually in 35 DEG C/h~45 DEG C/h, directly
Until 380 DEG C -390 DEG C.Since the heat transfer property of polytetrafluoroethylene (PTFE) is poor, if heating is too fast, the expansion of shape base each section is uneven,
Product is easily set to generate internal stress or even cracked, furthermore, shape base exospheric temperature has reached requirement, and internal layer temperature is also very low, such as
The phenomenon that fruit cools down with regard to this, and it will cause " outside interior lifes ripe ".And heat up it is too slow it is excessive extend the production cycle, so heating
It should be carried out by certain heating rate.
Step 2：Heat preservation a period of time at a sintering temperature；
For the sintering core for acoustic energy refrigeration machine regenerator, usually kept the temperature when shape base temperature reaches 380 DEG C~385 DEG C
It is advisable within 1 hour.Under the premise of ensureing sintering quality, soaking time is unsuitable long, and no it will cause the decomposition of resin, until making system
Product surface not only, blistering and cracked etc..
Step 3：The molded polytetrafluoroethylarticle object sintered is down to room temperature cooling from sintering temperature.
Cooling velocity is unsuitable or fast, and otherwise the ectonexine temperature difference so that shrinking uneven and having internal stress, or even occurs with regard to big
Crackle.1 thickness of regenerator of acoustic energy refrigeration machine so without quenching treatment, i.e., will be in sintering temperature usually in 4mm~8mm
Molding under degree is taken out to be put in again in asbestos case after slowly cooling to 150 DEG C is cooled to room temperature, slow due to cooling down, and is conducive to molecule
Regular arrangement can be very good to ensure the uniform of sintering core inner hole so the crystallinity of product is usually all bigger than quenching,
So that gas is steadily flowed through regenerator, reduces flow resistance loss.
The regenerator 1 for acoustic energy refrigeration machine of the present invention, using pure polytetrafluoroethylene (PTFE) as raw material, through high temperature, high-pressure sinter
At sintering polytetrafluoroethylene core, which has many advantages, such as that porosity height, large specific surface area, strength and toughness are high, as acoustic energy system
The regenerator of cold can be such that backheat performance is substantially improved.
Acoustic energy refrigeration machine as shown in Figure 3, including regenerator 1, upper casing 5, expansion cylinder 4, hot end heat exchanger 2, cold end are changed
Hot device 3, compression chamber 6 and expansion chamber 7, compression chamber 6 and expansion chamber 7 are located at the bottom end and top of expansion cylinder 4, regenerator 1,
Hot end heat exchanger 2,3 annular of cool end heat exchanger are located at outside expansion cylinder 4, and 1 outer ring surface of regenerator and the inside of upper casing 5 are tight
Patch, inner ring surface are close to the outside of expansion cylinder 4, and lower end resists hot end heat exchanger 2, and upper end resists cool end heat exchanger 3.
Including the acoustic energy refrigeration machine course of work of regenerator 1 of the present invention is as follows：
Step 1：Working medium gas in compression chamber 6 generates heat after being compressed, by hot end heat exchanger 2, by the heat of generation
Amount is released to external environment through hot end heat exchanger 2；
Step 2：Working medium gas is cooled when flowing through regenerator 1, and heat is transmitted to regenerator 1, the temperature pressure of Working medium gas
Power declines；
Step 3：Working medium gas enters 7 swell refrigeration of expansion chamber, exports cold by cool end heat exchanger 3；
Step 4：It is heated when Working medium gas flows back to regenerator 1, absorbs the heat in regenerator 1, the temperature of Working medium gas
Pressure rises, and returns to the continuation of compression chamber 6 and is compressed；
Step 5：The above steps are repeated one to four, and Working medium gas is compressed and expansion by cycle, continuous cooling.
The acoustic energy refrigeration machine of the present invention, gas form hot fluid after being compressed, and cold fluid, hot and cold stream are formed after inflated
Body flows alternately through 1 flow channel space of same regenerator.
In first cyclic process, heat is transmitted to regenerator 1 when hot fluid flows through regenerator 1, regenerator 1 absorbs storage
Deposit heat.When cold fluid again flows through regenerator 1, the heat that regenerator 1 stores is for heating cold fluid, heat utilization ratio
Height, heating effect are good；Meanwhile being cooled after 1 heated thermal fluid of regenerator, storage cold works as heat in cyclic process next time
When fluid flows through regenerator 1, the cold of storage is used for heat flux body, equally, high cold energy utilization rate, good cooling results.Therefore,
Technical scheme of the present invention accumulates last cycle gained cold periodically, and passes it to the work that becomes a mandarin recycled next time
Matter takes full advantage of the refrigerating capacity of different potential temperatures in process of refrigerastion, improves the utilization rate of energy.
Disclosed above is only the embodiment of the present invention, and still, the present invention is not limited to this, the technology of any this field
What personnel can think variation should all fall into protection scope of the present invention.
Claims (10)
1. a kind of regenerator for acoustic energy refrigeration machine, the acoustic energy refrigeration machine includes upper casing (5), expansion cylinder (4), hot junction
Heat exchanger (2), cool end heat exchanger (3), compression chamber (6) and expansion chamber (7), which is characterized in that the regenerator (1) is polytetrafluoro
Ethylene is through ring-shaped cylinder shape structure made of high temperature, high-pressure sinter, the compression chamber (6) and expansion chamber (7) of the acoustic energy refrigeration machine
It is located at the bottom end and top of expansion cylinder (4), the regenerator (1), hot end heat exchanger (2), cool end heat exchanger (3) are surround
It is external in expansion cylinder (4), it is close on the inside of regenerator (1) outer ring surface and upper casing (5), inner ring surface and expansion cylinder
(4) it is close on the outside of, lower end resists hot end heat exchanger (2), and upper end resists cool end heat exchanger (3).
2. regenerator according to claim 1, which is characterized in that the internal diameter of the regenerator (1) is 37.6mm-
39.6mm, one-sided thickness 4mm-8mm.
3. regenerator according to claim 1, which is characterized in that the length of the regenerator (1) is 55mm-62mm.
4. regenerator according to claim 1, which is characterized in that the porosity of the regenerator (1) is 30%-80%.
5. a kind of manufacturing method of regenerator as described in any one of claim 1-4, which is characterized in that including following step
Suddenly：Step 1：Heating firing is carried out to polytetrafluoroethylene (PTFE) shape base by certain heating rate, until rising to sintering temperature；
Step 2：Heat preservation a period of time at a sintering temperature；
Step 3：The molded polytetrafluoroethylarticle object sintered is down to room temperature cooling from sintering temperature.
6. manufacturing method according to claim 5, which is characterized in that the heating rate of the step 1 is 35 DEG C/h-45
DEG C/h, sintering temperature is 380 DEG C -390 DEG C.
7. manufacturing method according to claim 5, which is characterized in that the heat preservation of the step 2 is, 380 DEG C~385
1 hour is kept the temperature at a temperature of DEG C.
8. manufacturing method according to claim 5, which is characterized in that the step 3 is cooled to, first by polytetrafluoroethyl-ne
Alkene molding is cooled to 150 DEG C, further takes out to be put in asbestos case and is cooled to room temperature.
9. a kind of acoustic energy refrigeration machine, including upper casing (5), expansion cylinder (4), hot end heat exchanger (2), cool end heat exchanger (3), pressure
Contracting chamber (6) and expansion chamber (7), which is characterized in that further include the regenerator (1) described in any one of claim 1-4, the pressure
Contracting chamber (6) and expansion chamber (7) are located at the bottom end and top of expansion cylinder (4), the regenerator (1), hot end heat exchanger
(2), cool end heat exchanger (3) is surrounded on expansion cylinder (4) outside, and the inside of regenerator (1) outer ring surface and upper casing (5) is tight
It pastes, is close on the outside of inner ring surface and expansion cylinder (4), lower end resists hot end heat exchanger (2), and upper end resists cool end heat exchanger (3).
10. a kind of course of work of acoustic energy refrigeration machine as claimed in claim 9, which is characterized in that include the following steps：
Step 1：Working medium gas in compression chamber (6) generates heat after being compressed, by hot end heat exchanger (2), by the heat of generation
Amount is released to external environment through hot end heat exchanger (2)；
Step 2：Working medium gas is cooled when flowing through regenerator (1), and heat is transmitted to regenerator (1), the temperature pressure of Working medium gas
Power declines；
Step 3：Working medium gas enters expansion chamber (7) swell refrigeration, exports cold by cool end heat exchanger (3)；
Step 4：Working medium gas is heated when flowing back to regenerator (1), absorbs the heat in regenerator (1), the temperature of Working medium gas
Pressure rises, and returns to compression chamber (6) and continues to be compressed；
Step 5：The above steps are repeated one to four, and Working medium gas is compressed and expansion by cycle, continuous cooling.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810311668.6A CN108444131A (en) | 2018-04-09 | 2018-04-09 | A kind of regenerator and its manufacturing method, acoustic energy refrigeration machine and the course of work for acoustic energy refrigeration machine |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810311668.6A CN108444131A (en) | 2018-04-09 | 2018-04-09 | A kind of regenerator and its manufacturing method, acoustic energy refrigeration machine and the course of work for acoustic energy refrigeration machine |
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| CN108444131A true CN108444131A (en) | 2018-08-24 |
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| CN201810311668.6A Withdrawn CN108444131A (en) | 2018-04-09 | 2018-04-09 | A kind of regenerator and its manufacturing method, acoustic energy refrigeration machine and the course of work for acoustic energy refrigeration machine |
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Citations (11)
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|---|---|---|---|---|
| DE19512351C1 (en) * | 1995-04-01 | 1996-11-14 | Poehlmann Klaus Ernst | Honeycomb block for heat exchangers |
| CN1212722A (en) * | 1996-10-30 | 1999-03-31 | 株式会社东芝 | Cold accumulation material for ultra-low temp., refrigerating machine using the material and heat shield material |
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| US6688113B1 (en) * | 2003-02-11 | 2004-02-10 | Superconductor Technologies, Inc. | Synthetic felt regenerator material for stirling cycle cryocoolers |
| JP2004251517A (en) * | 2003-02-19 | 2004-09-09 | Fuji Electric Systems Co Ltd | Cold storage tank |
| CN1757992A (en) * | 2005-10-27 | 2006-04-12 | 中国科学院上海技术物理研究所 | A kind of annular cold accumulator that is used for sterlin refrigerator |
| CN1959298A (en) * | 2006-11-24 | 2007-05-09 | 中国科学院上海技术物理研究所 | Stirling refrigerating machine being as cold source of low temperature refrigerator |
| CN101130277A (en) * | 2006-08-22 | 2008-02-27 | 沈阳气体压缩机股份有限公司 | Sintering process for filling polytetrafluoroethylene |
| CN104534715A (en) * | 2014-12-09 | 2015-04-22 | 中国科学院上海技术物理研究所 | Low-vibration large-cooling-capacity free piston type Stirling cryocooler expansion machine |
| CN106152629A (en) * | 2015-04-08 | 2016-11-23 | 上海交通大学 | Multipaths regenerator for regenerating type low-temperature refrigerator |
| CN208365857U (en) * | 2018-04-09 | 2019-01-11 | 杨厚成 | A kind of regenerator for sound energy refrigeration machine and the sound energy refrigeration machine with it |
-
2018
- 2018-04-09 CN CN201810311668.6A patent/CN108444131A/en not_active Withdrawn
Patent Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE19512351C1 (en) * | 1995-04-01 | 1996-11-14 | Poehlmann Klaus Ernst | Honeycomb block for heat exchangers |
| CN1212722A (en) * | 1996-10-30 | 1999-03-31 | 株式会社东芝 | Cold accumulation material for ultra-low temp., refrigerating machine using the material and heat shield material |
| CN1371465A (en) * | 1999-08-27 | 2002-09-25 | Abb专利有限公司 | Heating element for regeneration heat exchanger and method for producing heating element |
| US6688113B1 (en) * | 2003-02-11 | 2004-02-10 | Superconductor Technologies, Inc. | Synthetic felt regenerator material for stirling cycle cryocoolers |
| JP2004251517A (en) * | 2003-02-19 | 2004-09-09 | Fuji Electric Systems Co Ltd | Cold storage tank |
| CN1757992A (en) * | 2005-10-27 | 2006-04-12 | 中国科学院上海技术物理研究所 | A kind of annular cold accumulator that is used for sterlin refrigerator |
| CN101130277A (en) * | 2006-08-22 | 2008-02-27 | 沈阳气体压缩机股份有限公司 | Sintering process for filling polytetrafluoroethylene |
| CN1959298A (en) * | 2006-11-24 | 2007-05-09 | 中国科学院上海技术物理研究所 | Stirling refrigerating machine being as cold source of low temperature refrigerator |
| CN104534715A (en) * | 2014-12-09 | 2015-04-22 | 中国科学院上海技术物理研究所 | Low-vibration large-cooling-capacity free piston type Stirling cryocooler expansion machine |
| CN106152629A (en) * | 2015-04-08 | 2016-11-23 | 上海交通大学 | Multipaths regenerator for regenerating type low-temperature refrigerator |
| CN208365857U (en) * | 2018-04-09 | 2019-01-11 | 杨厚成 | A kind of regenerator for sound energy refrigeration machine and the sound energy refrigeration machine with it |
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Application publication date: 20180824 |
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