CN106016803A - Cooling head of low temperature refrigerating machine - Google Patents
Cooling head of low temperature refrigerating machine Download PDFInfo
- Publication number
- CN106016803A CN106016803A CN201610503445.0A CN201610503445A CN106016803A CN 106016803 A CN106016803 A CN 106016803A CN 201610503445 A CN201610503445 A CN 201610503445A CN 106016803 A CN106016803 A CN 106016803A
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- China
- Prior art keywords
- cooling cylinder
- heat exchanger
- transition piece
- cryo refrigerator
- cold
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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
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Mechanical Engineering (AREA)
- Thermal Sciences (AREA)
- General Engineering & Computer Science (AREA)
- Forging (AREA)
Abstract
The invention discloses a cooling head of a low temperature refrigerating machine. The cooling head comprises a cooling cylinder plug and a cooling cylinder which are connected together, wherein the cooling cylinder plug comprises a cooling head heat exchanger and a transition connecting piece; the cooling head heat exchanger is a circular tube with a flange; the transition connecting piece is connected with the circular tube; and a thread groove is formed in the inner top surface of the cooling head heat exchanger. According to the cooling head, the heat exchange area can be enlarged under the precondition that the size of a product is not increased.
Description
Technical field
The present invention relates to Cryo Refrigerator technical field, be specifically related to a kind of Cryo Refrigerator cold head.
Background technology
In the development of current science and technology, cryogenic technique usually plays the effect of key.In research laboratory, Instrumental Analysis,
The aspects such as information technology, it is often necessary to various Cryo Refrigerators.Such as, in order to detect in faint Far infrared radiation type
Electromagnetic signal, needs the low temperature detector until liquid helium temperature under 100K；For high-speed transfer and the substantial amounts of faint letter of process
Number, need to use low temperature and superconductor electronic technology, etc..Cryo Refrigerator, the most small-sized Cryo Refrigerator, is more coming
The most high-tech areas play an important role.
Cold head is the key component of various Cryo Refrigerator, and usual cold head is made up of cooling cylinder and cooling cylinder plug.Cooling cylinder plug is refrigeration
Machine and the parts of thermal force positive energy exchange.In prior art, cooling cylinder plug is by cold header heat exchanger with for connecting the transition of cooling cylinder
Connector is constituted.Wherein, the structure of cold header heat exchanger is flanged (FLGD) circular tube structure.Due to the surface finishing of circular tube structure,
Its heat exchange area can calculate according to the area formula of cylinder.It follows that in the case of material is selected, cold head to be increased changes
The cold that hot device produces, the diameter of pipe to be increased.So the volume that will make product increases, and is unfavorable for product
Miniaturization.
Chinese utility model patent " explosive welding compound material low temperature refrigerator cold head " (publication number: 202317426U；Open
Day: on July 11st, 2012) in refer to a kind of Cryo Refrigerator cold head, cooling cylinder plug 1 and cooling cylinder 2 be welded,
Wherein cooling cylinder plug 1 is made up of the cold header heat exchanger 11 with high heat conductance and transition piece 12, and cooling cylinder 2 is with transition even
Fitting 12 is integrally welded, and described cold header heat exchanger 11 is that flanged (FLGD) pipe is constituted, transition piece 12 and pipe
Connect.Cryo Refrigerator cold head structural representation as described in Fig. 1 is, for the structure of cooling cylinder plug 1 in figure, it is assumed that cold head
Being two grades of cold heads, in cold header heat exchanger 11, the radius of heat exchanging part is R, a length of H, and the computing formula of heat exchange area S is:
S=2 π RH+ π R2
Wherein π is constant, it can thus be appreciated that heat exchange area S to be made increases, at least increases radius R and length H of heat exchanging part
In any one.So heat exchange area S increases, it is meant that the volume of product increases.
Another problem that prior art exists is: the cold prepared to will take for bigger cost effectively passes to thermal force,
The material of cooling cylinder plug is generally selected the metal material that thermal conductivity is higher, owing to the Cryo Refrigerator cooling cylinder two ends temperature difference is relatively big, and
In order to reduce the conductive heat loss of the cold end of refrigeration machine and hot junction, the cooling cylinder of Cryo Refrigerator usually thin-wall construction and cooling cylinder select to lead
The material that heating rate is general.Owing to being the welding between foreign material, thin-walled cooling cylinder has strict demand (axiality to post welding distortion
More than 6 grades), in addition refrigeration machine postwelding leak rate is had strict demand (usually require that 3MPa, leak rate be less than 1 × 10-9Pa·m3·
s-1) so that the welding difficulty of cooling cylinder and cooling cylinder plug is relatively big, becomes a technique bottleneck of refrigeration machine through engineering approaches.
Summary of the invention
The present invention is directed to existing technical problem make improvements, i.e. the technical problem to be solved is to provide a kind of cooling cylinder
Plug, this cooling cylinder plug can increase its heat exchange area on the premise of the volume not increasing product.For solving the problems referred to above,
The technical scheme that the present invention provides is:
A kind of Cryo Refrigerator cold head, including the cooling cylinder plug linked together and cooling cylinder, described cooling cylinder plug includes that cold head changes
Hot device and transition piece, described cold header heat exchanger is flanged (FLGD) pipe, and transition piece is connected with pipe, described cold head
Heat exchanger inner top surface is provided with thread groove.
Further, described cold header heat exchanger inner side mounting thread groove.
Further, described cold header heat exchanger inner top surface can be dome structure.
Further, described thread groove cross sectional shape is triangle.
Further, the material of described cooling cylinder plug is oxygen-free copper, and the material of described cooling cylinder is rustless steel.
In technique scheme, increase heat exchange area by the thread groove of cold header heat exchanger inner top surface.It is known that surface
It is threaded the surface area of groove necessarily more than the surface area of flat surface.Further, cold header heat exchanger inner side mounting thread groove,
The surface area making cold header heat exchanger medial surface increases.Further, it is possible to cold header heat exchanger inner top surface is optimized for dome structure,
Surface area at this is increased.Further, for the ease of the understanding to thread groove, thread groove cross sectional shape is triangle,
Screw thread is easy to processing.Further, the material of cooling cylinder plug is preferably oxygen-free copper, and the thermal conductivity of oxygen-free copper is higher, is conducive to heat
The conduction of amount；The material of cooling cylinder is preferably rustless steel, advantageously reduces conductive heat loss.
Another technical problem that the invention solves the problems that is to provide and a kind of cooling cylinder can be made to carry out with cooling cylinder plug threadeding
Cold head.Avoid the various problems that cooling cylinder and cooling cylinder plug bring due to welding.
Further, described transition piece surface is provided with female thread, and described cooling cylinder surface is provided with external screw thread, this external screw thread and mistake
The female thread crossed on connector matches, and cooling cylinder is threaded connection with transition piece.
Further, it is provided with sealing ring between described cooling cylinder and transition piece.
In technique scheme, further, solve between cooling cylinder and cooling cylinder plug owing to welding the various problems brought.?
Transition piece surface is provided with female thread, is provided with external screw thread on cooling cylinder surface, by the screw thread between cooling cylinder and transition piece
Connect, it is achieved the connection between cooling cylinder and cooling cylinder plug.Referring now to original welding, welding postwelding to be considered leak rate and cold
Cylinder to problems such as the strict demands of post welding distortion, threaded these problems of can avoiding, and simpler easy.Enter one
Step, in order to ensure the air-tightness of entirety, increases sealing ring between cooling cylinder and transition piece.
The invention have the benefit that
Cooling cylinder plug the most of the present invention can increase its heat exchange area on the premise of the volume not increasing product.Screw thread
Groove is easy to processing, and can increase heat exchange area greatly, and the most within the specific limits, pitch is the least, can process
Screw thread
The number of turns is the most, i.e. screw thread is the most intensive, and the surface area at this is the biggest.
It is threaded connection between cooling cylinder the most of the present invention and cooling cylinder plug, it is to avoid cooling cylinder and cooling cylinder plug are due to welding
Band
The various problems come.
3. the present invention is on the premise of use is threaded, ensures overall air-tightness by sealing ring.
Cold header heat exchanger inner top surface the most of the present invention is dome structure so that the surface area at this increases, and increases further
Heat exchange area.
Accompanying drawing explanation
Fig. 1 is prior art construction schematic diagram.
Fig. 2 is the first embodiment structural representation.
Fig. 3 is cooling cylinder plug upward view in the first embodiment.
Fig. 4 is cooling cylinder stopper structure schematic diagram in the second embodiment.
Fig. 5 is the third embodiment structural representation.
Detailed description of the invention
Below in conjunction with embodiment and accompanying drawing, the present invention will be further described.
As in figure 2 it is shown, the first embodiment of the present invention, a kind of Cryo Refrigerator cold head, cold including link together
Cylinder plug 1 and cooling cylinder 2.Here the material selection oxygen-free copper of cooling cylinder plug, the material selection rustless steel of cooling cylinder.
Described cooling cylinder plug 1 includes that cold header heat exchanger 11 and transition piece 12, cold header heat exchanger 11 are flanged (FLGD) pipe,
Transition piece 12 is connected with pipe, and cold header heat exchanger 11 inner top surface and medial surface process the thread groove 111 of screw thread form,
The cross sectional shape of this thread groove is triangle.
Present embodiment increases heat exchange area by increasing screw thread at cold header heat exchanger 12 inner surface.At cold header heat exchanger 11
The radius of middle heat exchanging part and length constant on the premise of, can by adjust screw thread parameter adjust heat exchange area.Such as,
Increase nominal diameter or increase thread turns can increase heat exchange area.
The feature of the first embodiment:
1. the cooling cylinder plug 1 described in present embodiment can increase its heat exchange area on the premise of the volume not increasing product.
2. the screw thread form described by present embodiment is prone to processing.
3. in present embodiment, oxygen-free copper elected as by the material of cylinder plug, and the thermal conductivity of oxygen-free copper is higher, beneficially the conduction of heat；
Rustless steel elected as by the material of cooling cylinder, advantageously reduces conductive heat loss.
The second embodiment of the present invention.On the basis of above-mentioned embodiment, by excellent for the inner top surface of cold header heat exchanger 11
Turn to dome structure 112.As it is shown on figure 3, be the structure after cold header heat exchanger 11 improves.
The feature of the second embodiment:
Present embodiment makes the surface area at this increase, and increases heat exchange area further.
As shown in Figure 4, the third embodiment of the present invention, improve on the basis of the first embodiment.
Female thread is increased, described in the first embodiment on transition piece 12 surface described in the first embodiment
Cooling cylinder 1 surface is provided with external screw thread, and this external screw thread matches with the female thread on transition piece 12, and cooling cylinder 1 is with transition even
Fitting
12 are threaded connection.It is provided with sealing ring 121 between described cooling cylinder 1 and transition piece 12.
Present embodiment passes through threadeding between cooling cylinder 2 with transition piece 12, it is achieved cooling cylinder 2 and cooling cylinder plug 1
Between connection.Referring now to original welding, weld postwelding leak rate to be considered and the cooling cylinder strict demand etc. to post welding distortion
Problem, threaded these problems of can avoiding, and simpler easy.
The feature of the third embodiment:
1. it is threaded connection between cooling cylinder 2 and the cooling cylinder plug 1 described in present embodiment, it is to avoid cooling cylinder and cooling cylinder plug
The various problems brought due to welding.
2. present embodiment is on the premise of use is threaded, ensures overall air-tightness by sealing ring.
Above-mentioned all of embodiment is only used for illustrating the principle of the present invention, is not limited to the scope of the present invention.To the present invention also
May be made that the cross sectional shape of other change, such as thread groove.These changes are still within the scope of the present invention.
Claims (7)
1. a Cryo Refrigerator cold head, including the cooling cylinder plug (1) linked together and cooling cylinder (2), described cooling cylinder blocks up
Head (1) includes cold header heat exchanger (11) and transition piece (12), and described cold header heat exchanger (11) is flanged (FLGD) circle
Pipe, transition piece (12) is connected with pipe, it is characterised in that described cold header heat exchanger (11) inner top surface is provided with screw thread
Groove (111).
2. Cryo Refrigerator cold head as claimed in claim 1, it is characterised in that described cold header heat exchanger (11) inner side
Face is provided with thread groove (111).
3. Cryo Refrigerator cold head as claimed in claim 1, it is characterised in that top in described cold header heat exchanger (11)
Face is dome structure (112).
4. Cryo Refrigerator cold head as claimed any one in claims 1 to 3, it is characterised in that described thread groove (111)
Cross sectional shape be triangle.
5. Cryo Refrigerator cold head as claimed in claim 1, it is characterised in that the material of described cooling cylinder plug (1) is
Oxygen-free copper, the material of described cooling cylinder (2) is rustless steel.
6. Cryo Refrigerator cold head as claimed in claim 1, it is characterised in that described transition piece (12) surface
Being provided with female thread, described cooling cylinder (2) surface is provided with external screw thread, this external screw thread and the interior spiral shell crossed on cold header heat exchanger (12)
Stricture of vagina matches, and cooling cylinder (2) is threaded connection with transition piece (12).
7. Cryo Refrigerator cold head as claimed in claim 6, it is characterised in that described cooling cylinder (2) and transition piece
(12) sealing ring (121) it is provided with between.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610503445.0A CN106016803A (en) | 2016-06-29 | 2016-06-29 | Cooling head of low temperature refrigerating machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610503445.0A CN106016803A (en) | 2016-06-29 | 2016-06-29 | Cooling head of low temperature refrigerating machine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106016803A true CN106016803A (en) | 2016-10-12 |
Family
ID=57104821
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610503445.0A Pending CN106016803A (en) | 2016-06-29 | 2016-06-29 | Cooling head of low temperature refrigerating machine |
Country Status (1)
| Country | Link |
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| CN (1) | CN106016803A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108507213A (en) * | 2018-04-19 | 2018-09-07 | 中船重工鹏力（南京）超低温技术有限公司 | A kind of cylinder and the Cryo Refrigerator using the cylinder |
| CN110749115A (en) * | 2019-11-11 | 2020-02-04 | 中国科学院上海技术物理研究所 | Multi-functional low temperature vortex coil pipe precooling heat exchanger |
| CN112963980A (en) * | 2021-04-01 | 2021-06-15 | 哈尔滨工业大学 | Cold head heat exchanger |
| DE102020123053A1 (en) | 2020-09-03 | 2022-03-03 | Helmholtz-Zentrum Berlin für Materialien und Energie Gesellschaft mit beschränkter Haftung | Assembly forming a device for heat exchange between two solids |
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| JPH08128742A (en) * | 1994-10-28 | 1996-05-21 | Toshiba Corp | Extremely low temperature device |
| JP2000292022A (en) * | 1999-04-02 | 2000-10-20 | Fuji Electric Co Ltd | Gas cycle engine refrigerating machine |
| 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 |
| JP2010054128A (en) * | 2008-08-28 | 2010-03-11 | Taiyo Nippon Sanso Corp | Heat exchanger for refrigerating machine, and cooling method of liquefied gas by heat exchanger |
| CN202317426U (en) * | 2011-11-18 | 2012-07-11 | 中国电子科技集团公司第十四研究所 | Explosive welding compound material low temperature refrigerator cold head |
| CN202813865U (en) * | 2012-07-10 | 2013-03-20 | 上海联影医疗科技有限公司 | Refrigerator cold head installing structure for magnetic resonance superconducting magnet |
| CN205878670U (en) * | 2016-06-29 | 2017-01-11 | 安徽万瑞冷电科技有限公司 | Cryocooler cold head |
-
2016
- 2016-06-29 CN CN201610503445.0A patent/CN106016803A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
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| JPH08128742A (en) * | 1994-10-28 | 1996-05-21 | Toshiba Corp | Extremely low temperature device |
| JP2000292022A (en) * | 1999-04-02 | 2000-10-20 | Fuji Electric Co Ltd | Gas cycle engine refrigerating machine |
| 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 |
| JP2010054128A (en) * | 2008-08-28 | 2010-03-11 | Taiyo Nippon Sanso Corp | Heat exchanger for refrigerating machine, and cooling method of liquefied gas by heat exchanger |
| CN202317426U (en) * | 2011-11-18 | 2012-07-11 | 中国电子科技集团公司第十四研究所 | Explosive welding compound material low temperature refrigerator cold head |
| CN202813865U (en) * | 2012-07-10 | 2013-03-20 | 上海联影医疗科技有限公司 | Refrigerator cold head installing structure for magnetic resonance superconducting magnet |
| CN205878670U (en) * | 2016-06-29 | 2017-01-11 | 安徽万瑞冷电科技有限公司 | Cryocooler cold head |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108507213A (en) * | 2018-04-19 | 2018-09-07 | 中船重工鹏力（南京）超低温技术有限公司 | A kind of cylinder and the Cryo Refrigerator using the cylinder |
| WO2019200642A1 (en) * | 2018-04-19 | 2019-10-24 | 中船重工鹏力（南京）超低温技术有限公司 | Air cylinder and cryogenic refrigerating machine using same |
| CN108507213B (en) * | 2018-04-19 | 2024-03-01 | 中船重工鹏力（南京）超低温技术有限公司 | Cylinder and cryogenic refrigerator adopting same |
| CN110749115A (en) * | 2019-11-11 | 2020-02-04 | 中国科学院上海技术物理研究所 | Multi-functional low temperature vortex coil pipe precooling heat exchanger |
| CN110749115B (en) * | 2019-11-11 | 2023-12-26 | 中国科学院上海技术物理研究所 | Multifunctional low-temperature vortex coil precooling heat exchanger |
| DE102020123053A1 (en) | 2020-09-03 | 2022-03-03 | Helmholtz-Zentrum Berlin für Materialien und Energie Gesellschaft mit beschränkter Haftung | Assembly forming a device for heat exchange between two solids |
| CN112963980A (en) * | 2021-04-01 | 2021-06-15 | 哈尔滨工业大学 | Cold head heat exchanger |
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Application publication date: 20161012 |