CN108180777A - A kind of cold end slit heat exchanger and its manufacturing method for acoustic energy refrigeration machine - Google Patents
A kind of cold end slit heat exchanger and its manufacturing method for acoustic energy refrigeration machine Download PDFInfo
- Publication number
- CN108180777A CN108180777A CN201810147277.5A CN201810147277A CN108180777A CN 108180777 A CN108180777 A CN 108180777A CN 201810147277 A CN201810147277 A CN 201810147277A CN 108180777 A CN108180777 A CN 108180777A
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- Prior art keywords
- cold end
- round hole
- slit
- heat exchanger
- heat exchange
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
- F28D21/00—Heat-exchange apparatus not covered by any of the groups F28D1/00 - F28D20/00
-
- 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)
- Thermal Sciences (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
Abstract
The present invention provides a kind of cold end slit heat exchanger and its manufacturing method for acoustic energy refrigeration machine, cold end slit heat exchanger is set in circular, the radial multiple heat exchange slits being uniformly distributed and radially extended far from axle center are offered in the inner ring of cold end slit heat exchanger, the slit that exchanges heat runs through the both ends of cold end slit heat exchanger, the first round hole and the second round hole are further opened in the inner ring of cold end slit heat exchange, first round hole and the second round hole are divided into heat exchange slit in axis direction stepped, the diameter of first round hole is bigger than the diameter of the second round hole, second round hole is 2.0 to 8.0 millimeters in axial height.The heat exchange slit of cold end slit heat exchanger is step type, can eliminate the thermal contact resistance of acoustic energy refrigeration machine, and the flow resistance of working medium is smaller, and heat exchange is better with water conservancy diversion, can improve the conduction cooling and flow conductivity of acoustic energy refrigeration machine cold end.
Description
Technical field
The present invention relates to acoustic energy refrigerator appliance technical field more particularly to a kind of cold end slits for acoustic energy refrigeration machine
Heat exchanger and its manufacturing method.
Background technology
As space technology, infrared technique, superconductor technology, cryogenic medicine, low-temperature electronics, superconductor technology etc. are a series of existing
For high-tech fast development, cryogenic technique is also more and more widely used and is paid close attention to.Such as the infrared spy of space satellite
Survey device at low ambient temperatures could normal operation, the super conductive filter to work under low temperature environment can reduce noise to telecommunications signal
Interference, so as to greatly reduce signal fault rate, magnetic suspension train, plasma technology, NMR imaging instrument etc. with low temperature
Technology is support.These high-tech technical fields are to the refrigeration machine of High cooling power, lightweight, small size, high efficiency and high reliability
Demand is more and more urgent.
Acoustic energy refrigeration machine includes sterlin refrigerator, vascular refrigerator and hot sound refrigerating machine, belongs to regenerating type low-temperature refrigeration
Machine, nowadays the application in low temperature field is more and more extensive.The cool end heat exchanger conduction cooling element important as acoustic energy refrigeration machine, undertakes
It and conducts the cold in expansion chamber to extraneous effect, the height of heat exchange efficiency is directly related to the refrigeration of refrigeration machine
Energy.
Invention content
The first object of the present invention is to provide a kind of cold end slit heat exchanger for acoustic energy refrigeration machine, can eliminate acoustic energy system
The thermal contact resistance of cold, the flow resistance of working medium is smaller, and heat exchange is better with water conservancy diversion, improves the conduction cooling of acoustic energy refrigeration machine cold end
And flow conductivity.
The second object of the present invention is to provide a kind of manufacturing method of above-mentioned cold end slit heat exchanger, convenient processing and manufacture,
It is at low cost.
In order to realize the first object of the present invention, the present invention provides a kind of cold end slit heat exchanger and is set in circular, cold
It holds and the radial multiple heat exchange slits being uniformly distributed and separate axle center radially extends is offered in the inner ring of slit heat exchanger, change
Hot slit runs through the both ends of cold end slit heat exchanger, and the first round hole and the second circle are further opened in the inner ring of cold end slit heat exchange
Shape hole, the first round hole and the second round hole are divided into heat exchange slit in axis direction stepped, the diameter of the first round hole
Diameter than the second round hole is big, and the second round hole is 2.0 to 8.0 millimeters in axial height.
It is 20 to 180 that further scheme, which is the exchange heat quantity of slit, and the width for the slit that exchanges heat is 0.2 to 1.0 milli
Rice.
It is 35 to 55 that further scheme, which is the exchange heat quantity of slit, and the width for the slit that exchanges heat is 0.2 to 0.3 milli
Rice.
Further scheme is a diameter of 2.0 to 8.0 millimeters of the second round hole.
Further scheme is that cold end slit heat exchanger is 3.0 to 50 millimeters in axial height.
Further scheme is, straight with the outer diameter of the expansion piston of the first round hole shaft hole matching and the first round hole
Difference between diameter is 20 to 40 microns.
Further scheme is that the first round hole is more than the amplitude of expansion piston in axial height.
Further scheme is that the first round hole is 5.0 to 10 millimeters in axial height.
By said program as it can be seen that the first round hole and the second round hole of cold end slit heat exchanger heat exchange slit in axis
Direction is divided into stepped, increases the total length of heat exchange slit, and then increase cold end slit heat exchanger and Working medium gas
Contact heat-exchanging area, so as to eliminate the thermal contact resistance of acoustic energy refrigeration machine, the flow resistance of working medium is smaller, and heat exchange and water conservancy diversion effect are more
It is good, the conduction cooling and flow conductivity of acoustic energy refrigeration machine cold end can be improved.
In order to realize the second object of the present invention, the present invention provides a kind of manufacturing method of cold end slit heat exchanger, cold end
Slit heat exchanger is set in circular, and radial be uniformly distributed and far from axle center is offered in the inner ring of cold end slit heat exchanger
The multiple heat exchange slits radially extended, heat exchange slit is on the both ends of cold end slit heat exchanger, the inner ring of cold end slit heat exchange
The first round hole and the second round hole are further opened with, the first round hole and the second round hole are divided heat exchange slit in axis direction
To be stepped, the diameter of the first round hole is bigger than the diameter of the second round hole, the second round hole axial height for 2.0 to
8.0 millimeters, manufacturing method includes：There is provided one has the mold of specific shape；The fluent material that would be heated to proper temperature is squeezed into
Annulus is formed in mold, there is the first round hole and the second round hole on annulus；Using the end face of the second round hole as starting point court
Axial equably wire cutting goes out multiple heat exchange slits.
By said program as it can be seen that the manufacturing method makes the convenient processing and manufacture of cold end slit heat exchanger, manufacture is at low cost.
Cold end slit heat exchanger of the present invention especially suitable for acoustic energy refrigeration machine, the acoustic energy refrigeration machine include casing,
Regenerator, expansion piston, cold head and cold end slit heat exchanger, regenerator are located in housing, and expansion piston is movably with returning
One end connection of the shaft hole matching of hot device, cold head and casing, cold end slit heat exchanger are set in circular, cold end slit heat exchanger
Inner ring on offer the radial multiple heat exchange slits being uniformly distributed and radially extend far from axle center, heat exchange slit is through cold
The both ends of slit heat exchanger are held, the first round hole and the second round hole, the first circle are further opened in the inner ring of cold end slit heat exchange
Shape hole and the second round hole are divided into heat exchange slit in axis direction stepped, and the diameter of the first round hole is than the second round hole
Diameter it is big, the second round hole is 2.0 to 8.0 millimeters in axial height, and it is interior and set that cold end slit heat exchanger is located at housing
Between regenerator and cold head, and one end of expansion piston can be inserted into the first round hole of cold end slit heat exchanger.
By said program as it can be seen that expansion piston does linear reciprocating motion in the first round hole, the outer diameter of expansion piston with
There is difference between the diameter of first round hole, to ensure the frictionless motion between expansion piston and the first round hole.Working medium gas
Body flows to the second round hole, when expansion piston motion value top dead-centre, full of Working medium gas, the second round hole in the second round hole
Gas is uniformly distributed into each heat exchange slit, ensure that the heat exchange of cold end slit heat exchanger is uniform, to improve acoustic energy refrigeration
The conduction cooling and flow conductivity of machine cold end.
Description of the drawings
Fig. 1 is a kind of structural representation of cold end slit heat exchanger for acoustic energy refrigeration machine provided in an embodiment of the present invention
Figure；
Fig. 2 is a kind of front view of cold end slit heat exchanger for acoustic energy refrigeration machine provided in an embodiment of the present invention；
Fig. 3 is sectional views of the Fig. 2 at A-A；
Fig. 4 is the side sectional view of acoustic energy refrigeration machine provided in an embodiment of the present invention.
The invention will be further described with reference to the accompanying drawings and embodiments.
Specific embodiment
Referring to Fig. 1 to Fig. 3, a kind of cold end slit heat exchanger 1 for acoustic energy refrigeration machine is whole in circular setting, cold end
The radial multiple heat exchange slits 12 being uniformly distributed and separate axle center radially extends are offered in the inner ring of slit heat exchanger 1,
The slit 12 that exchanges heat runs through the both ends of cold end slit heat exchanger 1.The first round hole 11 is further opened in the inner ring of cold end slit heat exchange 1
With the second round hole 13, the first round hole 11 and the second round hole 13 heat exchange slit 12 is divided into axis direction it is stepped,
The total length of heat exchange slit 12 is increased, and then increases the contact heat-exchanging area of cold end slit heat exchanger 1 and Working medium gas.The
The diameter D2 of one round hole 11 is bigger than the diameter D1 of the second round hole 13, and the diameter D1 of the second round hole 13 is by heat exchange slit 12
Depending on number and width, it is preferable that the diameter D1 of the second round hole 13 is 2.0 to 8.0 millimeters.Second round hole 13 is in axial direction
Height for (h1-h2), value is not easy excessive, and no it will cause larger expansion chamber dead volumes, it is preferable that the second round hole 13
It it is 2.0 to 8.0 millimeters in axial height (h1-h2).
The width a and number of heat exchange slit 12 are highly important to the heat exchange efficiency of entire cold end slit heat exchanger 1.It is cold
The variation of the 12 width a of heat exchange slit of slit heat exchanger 1 is held, refrigerating capacity and the expanding machine coefficient of performance can all change.There are optimal
12 width a of heat exchange slit so that under similary compression piston stroke, the cold of refrigeration machine is maximum, expanding machine coefficient of performance highest.
Change the width a of heat exchange slit 12, the heat exchange area of cold end slit heat exchanger 1 is basically unchanged.Exchanging heat, slit 12 is narrower, and resistance is got over
Greatly；The slit 12 that exchanges heat is wider, and only the working medium close to the end face of heat exchange slit 12 has obtained sufficient heat exchange, and narrow far from exchanging heat
The fluid of the end face of seam 12 cannot adequately be exchanged heat.Thus, under certain heat exchange area, there are optimal heat exchange slits
12 width a, resistance is smaller while ensureing that the working medium in heat exchange slit 12 is adequately exchanged heat, while permits in processing conditions
Perhaps in the case of, the quantity of heat exchange slit 12 is 20 to 180, and the width a of heat exchange slit 12 is 0.2 to 1.0 millimeter.By excellent
Change and calculate, when the quantity of heat exchange slit 12 is 35 to 55, and the width a for the slit 12 that exchanges heat is 0.2 to 0.3 millimeter, cold end
The heat transfer effect of slit heat exchanger 1 is best.
Cold end slit heat exchanger 1 can be determined in axial height h1 according to the cold end thermic load of refrigeration machine, it is preferable that cold end
Slit heat exchanger 1 is 3.0 to 50 millimeters in axial height h1.With the expansion piston outer diameter of 11 shaft hole matching of the first round hole with
It is clearance fit between the diameter D2 of first round hole 11, i.e. between the diameter D2 of the outer diameter of expansion piston and the first round hole 11
Difference for 20 to 40 microns, to ensure the frictionless motion between expansion piston and the first round hole 11.First round hole 11
It is more than the amplitude of expansion piston in axial height h1, it is preferable that the first round hole 11 is 5.0 to 10 millis in axial height h1
Rice.
The heat exchange slit 12 of cold end slit heat exchanger 1 is step type, can eliminate the thermal contact resistance of acoustic energy refrigeration machine, working medium
Flow resistance is smaller, and heat exchange is better with water conservancy diversion, can improve the conduction cooling and flow conductivity of acoustic energy refrigeration machine cold end.
The manufacturing method of cold end slit heat exchanger 1 includes：There is provided one has the mold of specific shape, then, would be heated to
The fluent material of proper temperature is squeezed into and annulus is formed in mold, has the first round hole 11 and the second round hole 13 on the annulus,
Then, go out multiple heat exchange slits 12 towards axial equably wire cutting using the end face of the second round hole 13 as starting point.The manufacturer
Method makes the convenient processing and manufacture of cold end slit heat exchanger 1, and manufacture is at low cost.
Referring to Fig. 4, acoustic energy refrigeration machine includes casing 5, regenerator 4, expansion piston 3, cold head 2 and the heat exchange of cold end slit
Device, cold end slit heat exchanger are the cold end slit heat exchanger 1 of said program.Regenerator 4 is located in housing 5, and expansion piston 3 is removable
The shaft hole matching on dynamic ground and regenerator 4, cold head 2 and one end of casing 5 are welded and fixed, and cold end slit heat exchanger 1 is located at shell
In body 5 and it is arranged between regenerator 4 and cold head 2, the outer wall of the inner surface and cold end slit heat exchanger 1 of housing 5 is welded and fixed,
And one end of expansion piston 3 can between the first round hole 11 of cold end slit heat exchanger 1 axis hole clearance fit.It is also, cold
13 end face of the second round hole and the bottom of cold head 2 of end slit heat exchanger 1 are welded and fixed, and are eliminated thermal contact resistance, are strengthened
Heat exchange.
When acoustic energy refrigeration machine works, expansion piston 3 does linear reciprocating motion in the first round hole 11, expansion piston 3
Difference between the diameter D2 of outer diameter and the first round hole 11 is 20 to 40 microns, to ensure 3 and first round hole of expansion piston
Frictionless motion between 11.Working medium gas flows to the second round hole 13, when 3 motion value top dead-centre of expansion piston, the second circle
Full of Working medium gas in shape hole 13, the second round hole 13 uniformly distributes gas into each heat exchange slit 12, ensures cold end
The heat exchange of slit heat exchanger 1 is uniform.
Embodiment described above, only preferred embodiments of the invention are not therefore the Fan Yiben to limit the scope of the present invention
The equivalent change or modification that construction, feature and principle described in patent application the scope of the claims are done should all be included in of the invention special
In sharp application range.
Claims (9)
1. a kind of cold end slit heat exchanger for acoustic energy refrigeration machine, which is characterized in that the cold end slit heat exchanger is in annulus
Shape is set, and is offered in the inner ring of the cold end slit heat exchanger and radial be uniformly distributed and radially extended far from axle center more
A heat exchange slit, the heat exchange slit run through the both ends of the cold end slit heat exchanger；
The first round hole and the second round hole, first round hole and institute are further opened in the inner ring of the cold end slit heat exchange
State the second round hole the heat exchange slit is divided into axis direction it is stepped；
The diameter of first round hole is bigger than the diameter of second round hole, and second round hole is in axial height
2.0 to 8.0 millimeters.
2. cold end slit heat exchanger according to claim 1, it is characterised in that：
The quantity of the heat exchange slit is 20 to 180, and the width of the heat exchange slit is 0.2 to 1.0 millimeter.
3. cold end slit heat exchanger according to claim 2, it is characterised in that：
The quantity of the heat exchange slit is 35 to 55, and the width of the heat exchange slit is 0.2 to 0.3 millimeter.
4. cold end slit heat exchanger according to claim 1, it is characterised in that：
A diameter of 2.0 to 8.0 millimeters of second round hole.
5. cold end slit heat exchanger according to any one of claims 1 to 4, it is characterised in that：
The cold end slit heat exchanger is 3.0 to 50 millimeters in axial height.
6. cold end slit heat exchanger according to claim 5, it is characterised in that：
With the difference between the outer diameter of the expansion piston of the first round hole shaft hole matching and the diameter of first round hole
It is 20 to 40 microns.
7. cold end slit heat exchanger according to claim 6, it is characterised in that：
First round hole is more than the amplitude of the expansion piston in axial height.
8. cold end slit heat exchanger according to claim 7, it is characterised in that：
First round hole is 5.0 to 10 millimeters in axial height.
9. the manufacturing method of a kind of cold end slit heat exchanger for acoustic energy refrigeration machine, which is characterized in that the cold end slit changes
Hot device is the cold end slit heat exchanger of the claims 1 to 8, and the manufacturing method includes：
There is provided one has the mold of specific shape；
The fluent material that would be heated to proper temperature squeezes into formation annulus in the mold, has the described first circle on the annulus
Shape hole and second round hole；
Go out multiple heat exchange slits towards axial equably wire cutting using the end face of second round hole as starting point.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810147277.5A CN108180777A (en) | 2018-02-12 | 2018-02-12 | A kind of cold end slit heat exchanger and its manufacturing method for acoustic energy refrigeration machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810147277.5A CN108180777A (en) | 2018-02-12 | 2018-02-12 | A kind of cold end slit heat exchanger and its manufacturing method for acoustic energy refrigeration machine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108180777A true CN108180777A (en) | 2018-06-19 |
Family
ID=62552688
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810147277.5A Pending CN108180777A (en) | 2018-02-12 | 2018-02-12 | A kind of cold end slit heat exchanger and its manufacturing method for acoustic energy refrigeration machine |
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| CN (1) | CN108180777A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109028705A (en) * | 2018-07-13 | 2018-12-18 | 上海理工大学 | A kind of air-cooled frost-free refrigerator using function recycling vascular refrigerator |
| CN109028704A (en) * | 2018-07-13 | 2018-12-18 | 上海理工大学 | A kind of novel air-cooled frost-free refrigerator and refrigeration, temperature control method |
| CN110195992A (en) * | 2019-05-24 | 2019-09-03 | 西安交通大学 | Slit cool end heat exchanger for coaxial-type vascular refrigerator |
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| JPH07180938A (en) * | 1993-12-24 | 1995-07-18 | Toshiba Corp | Pulse tube refrigerator |
| US20040025502A1 (en) * | 2000-12-13 | 2004-02-12 | Satoshi Okano | Stirling engine, and stirling refrigerator |
| US20050022540A1 (en) * | 2002-08-16 | 2005-02-03 | Lg Cable Ltd | Heat driven acoustic orifice type pulse tube cryocooler |
| CN101298947A (en) * | 2008-06-26 | 2008-11-05 | 上海交通大学 | Screw thread welding integral narrow slit type coaxial pulse-tube refrigerator |
| CN106642822A (en) * | 2016-11-25 | 2017-05-10 | 中国科学院上海技术物理研究所 | Secondary intermediate heat exchanger for thermal coupling coaxial two-stage pulse pipe refrigerator and design method |
| CN208075651U (en) * | 2018-02-12 | 2018-11-09 | 杨厚成 | A kind of cold end slit heat exchanger for acoustic energy refrigeration machine |
-
2018
- 2018-02-12 CN CN201810147277.5A patent/CN108180777A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH07180938A (en) * | 1993-12-24 | 1995-07-18 | Toshiba Corp | Pulse tube refrigerator |
| US20040025502A1 (en) * | 2000-12-13 | 2004-02-12 | Satoshi Okano | Stirling engine, and stirling refrigerator |
| US20050022540A1 (en) * | 2002-08-16 | 2005-02-03 | Lg Cable Ltd | Heat driven acoustic orifice type pulse tube cryocooler |
| CN101298947A (en) * | 2008-06-26 | 2008-11-05 | 上海交通大学 | Screw thread welding integral narrow slit type coaxial pulse-tube refrigerator |
| CN106642822A (en) * | 2016-11-25 | 2017-05-10 | 中国科学院上海技术物理研究所 | Secondary intermediate heat exchanger for thermal coupling coaxial two-stage pulse pipe refrigerator and design method |
| CN208075651U (en) * | 2018-02-12 | 2018-11-09 | 杨厚成 | A kind of cold end slit heat exchanger for acoustic energy refrigeration machine |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109028705A (en) * | 2018-07-13 | 2018-12-18 | 上海理工大学 | A kind of air-cooled frost-free refrigerator using function recycling vascular refrigerator |
| CN109028704A (en) * | 2018-07-13 | 2018-12-18 | 上海理工大学 | A kind of novel air-cooled frost-free refrigerator and refrigeration, temperature control method |
| CN110195992A (en) * | 2019-05-24 | 2019-09-03 | 西安交通大学 | Slit cool end heat exchanger for coaxial-type vascular refrigerator |
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