EP1459017A1 - Systeme de contr le de debit de fluide cryogenique et refroidisseur joule-thomson comportant un tel systeme de contr le - Google Patents
Systeme de contr le de debit de fluide cryogenique et refroidisseur joule-thomson comportant un tel systeme de contr leInfo
- Publication number
- EP1459017A1 EP1459017A1 EP02804229A EP02804229A EP1459017A1 EP 1459017 A1 EP1459017 A1 EP 1459017A1 EP 02804229 A EP02804229 A EP 02804229A EP 02804229 A EP02804229 A EP 02804229A EP 1459017 A1 EP1459017 A1 EP 1459017A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- outlet passage
- end part
- fluid flow
- cryogenic fluid
- joule
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Classifications
-
- 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
- F25B9/02—Compression machines, plants or systems, in which the refrigerant is air or other gas of low boiling point using Joule-Thompson effect; using vortex effect
Definitions
- Control system for cryogenic fluid flow and Joule-Thomson cooler comprising such a control system
- the present invention relates to cryogenic fluid flow control systems, of the type comprising a first element forming a fluid supply channel and an outlet passage selectively concealed by a second element displaceable relative to the first element by effect of differences in expansion coefficients between the materials of the first and second elements.
- Known flow control systems of this type as described for example in documents FR -A- 2 377 588 or EP -A- 0 170 948, comprise a needle movable longitudinally relative to an outlet orifice under the effect of axial differential expansions between the first element comprising the orifice and a movable assembly including a rod and / or a bellows supporting the needle, in an arrangement delicate to manufacture and assemble, and therefore expensive, and with reliability not guaranteed, in particular in presence of vibrations.
- the object of the present invention is to provide a system of the type defined above, of simple, robust and inexpensive construction, and with increased reliability.
- the outlet passage comprises a part extending transversely relative to the fluid supply channel and opening out at the periphery of an end zone of the first element, the second element being arranged at least partially around this end zone.
- the end zone of the first element is cylindrical and the second element is annular and coaxial with said end zone
- the outlet passage comprises a downstream part of reduced section which cannot be obscured by the second element, this downstream part being constituted by an axial groove formed at the periphery of the end zone or by a capillary tube extending the supply channel through the end zone
- at least one of the first and second elements is made of plastic or metallic material.
- the present invention also relates to a Joule-Thomson expansion cooler, in particular for cryostat, comprising such a cryogenic fluid flow control system.
- FIG. 1 is a schematic view in partial section of a first embodiment of the invention
- FIG. 2 is a schematic view similar to Figure 1 of another embodiment of the invention.
- FIG. 3 is a partial view, in section, of a cryostat incorporating a Joule-Thomson cooler according to the invention.
- This system comprises a first elongated element, generally designated by the reference 1, ending in an end portion of enlarged diameter 2, and in which extends a blind bore 3 communicating selectively with a source of gas under pressure 4, by example of nitrogen or argon.
- the end part 2 forms a cylindrical peripheral zone 5 into which opens at least one radial transverse passage 6.
- a second annular element or ring 7 retained in place, in the example shown, around the peripheral zone 5 by a casing 8 fitted on the end part 2 and provided with an axial orifice 9 facing the bottom 10 of a housing, by metallic example, in which the flow control system is mounted and carrying for example an infrared detection cell 11.
- the ring 7 can be retained in place around the peripheral zone 5 by a simple stop, of the bar or pin type inserted in the end portion 2.
- an axial groove 12 opening upstream in the radial passage 6 and downstream in the front face of the end part 2 is formed in the peripheral zone 5.
- the annular ring 7 being made of a material having a coefficient of expansion markedly greater than that of the central element 1, the operation of the system is as follows:
- annular outlet passage 13 Before admitting the gas to be expanded, that is to say at ambient temperature, an annular outlet passage 13 with a section much larger than that of passage 6 exists between the ring 7 and the surface 5.
- the reduced-section gas outlet passage is produced by a capillary tube 13 passing through the bottom wall of the end part 2 while being brazed to the latter, and extending in the bore 3 in front of the radial passage 6 and advantageously beyond the opening 9 in the cover 8 to direct the reduced flow of cold fluid directly onto the area of the cell 11.
- the flow control system is similar to that of Figure 1, but the blind bore 3, where the radical passage opens 6, is offset laterally, in the part d end 2, near the axial leakage groove 12, and the working gas is conveyed by a tube 14, the downstream end of which is fitted and brazed into the bore 3 and the upstream zone of which is spirally formed to form a heat exchanger coil 15 extending axially in the housing 10 of the cryostat.
- element 1 can be made of plastic material, for example polyamide
- ring 7 can be made of plastic material, for example Teflon (TM).
- elements 1 and 7 are made of metal, advantageously of Invar and aluminum, respectively.
- the ring 7 can also be made of copper or copper alloy.
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Mechanical Engineering (AREA)
- Thermal Sciences (AREA)
- General Engineering & Computer Science (AREA)
- Separation By Low-Temperature Treatments (AREA)
- Devices That Are Associated With Refrigeration Equipment (AREA)
- Details Of Measuring And Other Instruments (AREA)
- Temperature-Responsive Valves (AREA)
Description
Claims
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR0115706A FR2833073B1 (fr) | 2001-12-05 | 2001-12-05 | Systeme de controle de debit de fluide cryogenique et refroidisseur joule-thomson comportant un tel systeme de controle |
FR0115706 | 2001-12-05 | ||
PCT/FR2002/003972 WO2003048657A1 (fr) | 2001-12-05 | 2002-11-20 | Systeme de contrôle de debit de fluide cryogenique et refroidisseur joule-thomson comportant un tel systeme de contrôle |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1459017A1 true EP1459017A1 (fr) | 2004-09-22 |
EP1459017B1 EP1459017B1 (fr) | 2007-09-26 |
Family
ID=8870123
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP02804229A Expired - Lifetime EP1459017B1 (fr) | 2001-12-05 | 2002-11-20 | Systeme de controle de debit de fluide cryogenique et refroidisseur joule-thomson comportant un tel systeme de controle |
Country Status (8)
Country | Link |
---|---|
US (1) | US7454916B2 (fr) |
EP (1) | EP1459017B1 (fr) |
AT (1) | ATE374344T1 (fr) |
AU (1) | AU2002365696A1 (fr) |
DE (1) | DE60222699T2 (fr) |
FR (1) | FR2833073B1 (fr) |
IL (2) | IL162299A0 (fr) |
WO (1) | WO2003048657A1 (fr) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR3022991B1 (fr) | 2014-06-30 | 2016-07-01 | Air Liquide | Dispositif refroidisseur joule-thomson et appareil de photo-detection comprenant un tel dispositif |
Family Cites Families (13)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR597993A (fr) * | 1925-05-12 | 1925-12-03 | Procédé et appareil de refroidissement par détente de gaz | |
US3719322A (en) * | 1971-04-08 | 1973-03-06 | Vernay Laboratories | Thermally responsive valve assembly |
GB1557922A (en) | 1977-01-13 | 1979-12-19 | Hymatic Eng Co Ltd | Cryogenic cooling apparatus |
US4152903A (en) * | 1978-04-13 | 1979-05-08 | Air Products And Chemicals, Inc. | Bimaterial demand flow cryostat |
FR2509448A1 (fr) * | 1981-07-07 | 1983-01-14 | Telecommunications Sa | Dispositif de regulation d'un refrigerateur a effet joule thomson |
FR2520131B1 (fr) * | 1982-01-19 | 1985-09-20 | Telecommunications Sa | Dispositif de regulation d'un refrigerateur a effet joule-thomson |
FR2568385B1 (fr) | 1984-07-30 | 1986-09-26 | Telecommunications Sa | Regulateur de refroidisseur a effet joule-thomson |
US4631928A (en) * | 1985-10-31 | 1986-12-30 | General Pneumatics Corporation | Joule-Thomson apparatus with temperature sensitive annular expansion passageway |
FR2598206B1 (fr) * | 1986-05-05 | 1988-07-08 | Air Liquide | Refroidisseur joule-thomson. |
GB2247517B (en) * | 1990-08-07 | 1994-01-26 | Hymatic Eng Co Ltd | Cryogenic cooling apparatus |
US5365750A (en) * | 1992-12-18 | 1994-11-22 | California Aquarium Supply | Remote refrigerative probe |
FR2725013B1 (fr) * | 1994-09-22 | 1996-12-13 | Air Liquide | Refroidisseur joule-thomson |
US20010030040A1 (en) * | 1999-12-23 | 2001-10-18 | Jia Hua Xiao | Miniature cryogenic heat exchanger |
-
2001
- 2001-12-05 FR FR0115706A patent/FR2833073B1/fr not_active Expired - Fee Related
-
2002
- 2002-11-20 AT AT02804229T patent/ATE374344T1/de not_active IP Right Cessation
- 2002-11-20 WO PCT/FR2002/003972 patent/WO2003048657A1/fr active IP Right Grant
- 2002-11-20 EP EP02804229A patent/EP1459017B1/fr not_active Expired - Lifetime
- 2002-11-20 AU AU2002365696A patent/AU2002365696A1/en not_active Abandoned
- 2002-11-20 IL IL16229902A patent/IL162299A0/xx active IP Right Grant
- 2002-11-20 US US10/498,284 patent/US7454916B2/en not_active Expired - Lifetime
- 2002-11-20 DE DE60222699T patent/DE60222699T2/de not_active Expired - Lifetime
-
2004
- 2004-06-02 IL IL162299A patent/IL162299A/en unknown
Non-Patent Citations (1)
Title |
---|
See references of WO03048657A1 * |
Also Published As
Publication number | Publication date |
---|---|
US7454916B2 (en) | 2008-11-25 |
EP1459017B1 (fr) | 2007-09-26 |
IL162299A0 (en) | 2005-11-20 |
DE60222699D1 (de) | 2007-11-08 |
DE60222699T2 (de) | 2008-07-03 |
ATE374344T1 (de) | 2007-10-15 |
IL162299A (en) | 2008-03-20 |
WO2003048657A1 (fr) | 2003-06-12 |
AU2002365696A1 (en) | 2003-06-17 |
US20050076653A1 (en) | 2005-04-14 |
FR2833073A1 (fr) | 2003-06-06 |
FR2833073B1 (fr) | 2004-05-21 |
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