CN111536713B - Throttling refrigerator and detector capable of realizing active temperature control and quick refrigeration - Google Patents
Throttling refrigerator and detector capable of realizing active temperature control and quick refrigeration Download PDFInfo
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- CN111536713B CN111536713B CN202010256503.0A CN202010256503A CN111536713B CN 111536713 B CN111536713 B CN 111536713B CN 202010256503 A CN202010256503 A CN 202010256503A CN 111536713 B CN111536713 B CN 111536713B
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- mandrel
- temperature control
- flange
- elastic piece
- active temperature
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- 238000005057 refrigeration Methods 0.000 title claims abstract description 28
- 238000007789 sealing Methods 0.000 claims abstract description 20
- 238000009434 installation Methods 0.000 claims description 4
- 239000000523 sample Substances 0.000 claims 1
- 238000003384 imaging method Methods 0.000 abstract description 4
- 239000013307 optical fiber Substances 0.000 abstract 1
- 238000001514 detection method Methods 0.000 description 7
- 239000000571 coke Substances 0.000 description 3
- 238000001816 cooling Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 238000003331 infrared imaging Methods 0.000 description 2
- 230000007704 transition Effects 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000001311 chemical methods and process Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 239000000779 smoke Substances 0.000 description 1
- 230000006641 stabilisation Effects 0.000 description 1
- 238000011105 stabilization Methods 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
Images
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
- F25B23/00—Machines, plants or systems, with a single mode of operation not covered by groups F25B1/00 - F25B21/00, e.g. using selective radiation effect
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01J—MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
- G01J5/00—Radiation pyrometry, e.g. infrared or optical thermometry
- G01J5/0003—Radiation pyrometry, e.g. infrared or optical thermometry for sensing the radiant heat transfer of samples, e.g. emittance meter
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- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Thermal Sciences (AREA)
- General Engineering & Computer Science (AREA)
- General Physics & Mathematics (AREA)
- Spectroscopy & Molecular Physics (AREA)
- Devices That Are Associated With Refrigeration Equipment (AREA)
- Cold Air Circulating Systems And Constructional Details In Refrigerators (AREA)
Abstract
The invention relates to a throttling refrigerator which comprises a mandrel, a flange, a sealing cover, a cold finger and a heat exchange tube wound on the outer wall of the mandrel. An expansion cavity is formed between the cold finger and the mandrel in an enclosing manner, the heat exchange tube is communicated with the expansion cavity through a throttling element, the flange is connected with the cold finger and seals the expansion cavity, and an air inlet channel communicated with the heat exchange tube and an air exhaust channel communicated with the expansion cavity are arranged in the flange; the sealing cover is movably covered at the outlet end of the exhaust passage by being limited by the elastic piece. In addition, the invention also relates to a detector adopting the throttling refrigerator. The exhaust passage is arranged in the flange, the sealing cover is limited by the elastic piece, and the sealing cover keeps a certain opening degree when the pressure in the expansion cavity and the elastic acting force keep balance, so that the back pressure of the refrigerator is maintained, and the aim of actively controlling the throttling refrigeration temperature is fulfilled. When the temperature-adjustable optical fiber is applied to a refrigeration type detector, the temperature of a focal plane of the detector can be stably and continuously adjusted, and the imaging stability of a chip is ensured.
Description
Technical Field
The invention belongs to the technical field of refrigeration and low-temperature engineering, and particularly relates to a throttling refrigerator capable of realizing active temperature control and rapid refrigeration and a detector adopting the throttling refrigerator.
Background
The infrared detection is developed along with military requirements and the like, the detection principle is detection according to the infrared radiation of a target, and compared with electromagnetic wave detection and the like, the infrared detection device has the advantages of small size, high resolution, good concealment, strong anti-interference capability and the like; compared with visible light detection, infrared detection has the advantages of smoke throwing, day and night working and the like. Physical or chemical processes such as infrared imaging of the refrigeration type infrared detector only occur in a low-temperature environment, and the working temperature is 100K or even lower; meanwhile, under the low temperature condition, the thermal noise of infrared imaging and the like can be reduced.
For the fast refrigeration type throttle detector, after the chip reaches the working temperature of 100K, the working temperature of the chip can be further reduced because the throttle refrigerator does not reach the temperature of the two-phase region, and the imaging stability of the chip is poor in the process of reducing the coke temperature.
Disclosure of Invention
The invention relates to a throttling refrigerator capable of realizing active temperature control and quick refrigeration and a detector adopting the throttling refrigerator, which can at least solve part of defects in the prior art.
The invention relates to a throttling refrigerator capable of realizing active temperature control and quick refrigeration, which comprises a mandrel, a cold finger, a flange and a heat exchange tube, wherein a throttling element is arranged on the heat exchange tube, the cold finger is sleeved outside the mandrel and surrounds the mandrel to form an expansion cavity, the heat exchange tube is wound on the outer wall of the mandrel and is communicated with the expansion cavity through the throttling element, the flange is connected with the cold finger and seals the expansion cavity, and an air inlet channel communicated with the heat exchange tube and an air outlet channel communicated with the expansion cavity are arranged in the flange;
the sealing cover is movably covered at the outlet end of the exhaust passage by being limited by an elastic piece, and the other end of the elastic piece is connected to the flange.
In one embodiment, the exhaust passage is provided in plurality, the cover is correspondingly provided in plurality, and each exhaust passage is communicated with the expansion cavity.
In one embodiment, each of the exhaust passages is disposed at regular intervals around the central axis of the mandrel.
In one embodiment, the elastic member is accommodated in the exhaust passage, and the cover is detachably covered on the outlet end of the exhaust passage.
In one embodiment, a mounting block is detachably fixed in the exhaust channel, and one end of the elastic member is fixedly connected with the inner surface of the cover and the other end of the elastic member is fixedly connected with the mounting block.
As one embodiment, a mounting block is slidably disposed in the exhaust channel, and one end of the elastic member is fixedly connected to the inner surface of the sealing cover while the other end is fixedly connected to the mounting block; the mounting block is provided with a screw rod, a kidney-shaped groove is correspondingly formed in the flange, the length direction of the kidney-shaped groove is parallel to the telescopic direction of the elastic piece, and the screw rod penetrates out of the kidney-shaped groove and is locked through a nut.
In one embodiment, the elastic member is a spring.
As an embodiment, the cold finger is coaxially sleeved outside the mandrel.
In one embodiment, the mandrel is a frustum-shaped mandrel, and the cold finger is a frustum-shaped cold finger.
The invention also relates to a detector, which comprises the throttling refrigerator capable of realizing active temperature control and quick refrigeration.
The invention has at least the following beneficial effects:
the flange is provided with the exhaust channel, the sealing cover is limited by the elastic element, high-pressure gas enters the heat exchange tube through the gas inlet channel for heat exchange, precooled gas is throttled and expanded by the throttling element, expanded gas is accumulated in the expansion cavity, when the pressure reaches a set back pressure, the limitation of the elastic acting force of the elastic element is overcome to open the sealing cover, the pressure in the expansion cavity and the elastic acting force are balanced, the sealing cover keeps a certain opening degree, the back pressure of the refrigerator is further maintained, the purpose of actively controlling the throttling refrigeration temperature is achieved, when the sealing cover is applied to the refrigeration type detector, the coke temperature of the detector can be stably controlled, and the imaging stability of a chip is ensured.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
Fig. 1 is a schematic structural diagram of a throttling refrigerator according to an embodiment of the present invention;
FIG. 2 is a schematic diagram of a temperature control structure according to an embodiment of the present invention;
fig. 3 is a schematic distribution diagram of a plurality of temperature control structures on a flange according to an embodiment of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention are clearly and completely described below, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
As shown in fig. 1, an embodiment of the invention provides a throttling refrigerator, which includes a mandrel 12, a cold finger 11, a flange 16 and a heat exchange tube 10, wherein a throttling element is arranged on the heat exchange tube 10, the cold finger 11 is sleeved outside the mandrel 12 and encloses with the mandrel 12 to form an expansion cavity, the heat exchange tube 10 is wound on the outer wall of the mandrel 12 and is communicated with the expansion cavity through the throttling element, the flange 16 is connected with the cold finger 11 and seals the expansion cavity, and an air inlet channel communicated with the heat exchange tube 10 and an air outlet channel 8 communicated with the expansion cavity are arranged in the flange 16. Wherein, the mandrel 12 and the cold finger 11 are conventional components in the field, and the specific structure is not described herein; the heat exchange tube 10 is typically wound around a mandrel 12, and may be spirally wound around the mandrel 12 as shown in fig. 1 to achieve the desired cooling effect, and the throttling element is conventional in the art and will not be described in detail herein. High-pressure gas enters the heat exchanger through the gas inlet channel, then expands after passing through the throttling element, and then flows back through the expansion cavity and the exhaust channel 8 to complete the refrigeration cycle. In one embodiment, as shown in fig. 1, the air inlet channel comprises an air inlet pipe 4 arranged in a flange 16, the air inlet pipe 4 is connected with the heat exchange pipe 10 through a transition connecting pipe 13, and the connection part of the transition connecting pipe 13, the air inlet pipe 4 and the heat exchange pipe 10 is preferably welded. The mandrel 12/cold finger 11 is connected with other components (such as a detector chip) through the flange 16, and the air inlet channel and the air outlet channel 8 are arranged on the flange 16, so that the components are compactly arranged, and the volume of the equipment can be correspondingly reduced. In a preferred embodiment, the cold finger 11 and the flange 16 are hermetically fitted, for example, a seal groove is formed in the cold finger 11, a seal ring 9 is disposed in the seal groove, and after the flange 16 is fitted to the cold finger 11, the seal ring 9 is used to hermetically fit the cold finger 11 and the flange.
In one embodiment, the cold finger 11 is coaxially sleeved outside the mandrel 12 to ensure uniformity of cooling, and the expansion cavity corresponds to an annular cavity.
In one embodiment, as shown in fig. 1, the mandrel 12 is a frustum-shaped mandrel 12, the cold finger 11 is a frustum-shaped cold finger 11, and rapid cooling can be achieved by adopting a conical structure.
The structure of the throttling refrigerator is further optimized, as shown in fig. 1 and fig. 2, the throttling refrigerator further comprises a cover 15, the cover 15 is movably covered at the outlet end of the exhaust passage 8 by being limited by an elastic member 7, and the other end of the elastic member 7 is connected to the flange 16. The elastic part 7 can adopt conventional elastic devices such as a spring 7 and the like, and in the embodiment, the spring 7 made of spring 7 steel is preferably adopted, so that the elastic part has better elasticity; it will be understood that the elastic element 7 is connected at one end to the cover 15 and at the other end to the above-mentioned flange 16. In an alternative embodiment, the cover 15 covers the outlet end of the exhaust passage 8 but can be separated from the outlet end, that is, the cover 15 can be separately covered on the outlet end of the exhaust passage 8, when the limitation of the elastic force of the elastic member 7 is not overcome, the cover 15 blocks the outlet end of the exhaust passage 8, and when the limitation of the elastic force of the elastic member 7 is overcome, the cover 15 is separated from the outlet end and is not contacted with the outlet end; in this embodiment, the elastic member 7 is preferably accommodated in the exhaust passage 8, which not only facilitates the arrangement, but also has a good effect of restricting the sealing cover 15. Other constructions are of course possible, for example the cover 15 is hinged to the flange 16, and the resilient member 7 is arranged opposite the hinge axis to limit the rotational movement of the cover 15.
In the embodiment, the exhaust channel 8 is arranged in the flange 16 and the sealing cover 15 is limited by the elastic element 7, high-pressure gas enters the heat exchange tube 10 for heat exchange through the gas inlet channel, the precooled gas is throttled and expanded through the throttling element, the expanded gas is accumulated in the expansion cavity, when the pressure reaches a set back pressure, the limitation of the elastic acting force of the elastic element 7 is overcome to open the sealing cover 15, at the moment, the pressure in the expansion cavity and the elastic acting force keep balanced, the sealing cover 15 keeps a certain opening degree, further, the back pressure of the refrigerator is maintained, the purpose of actively controlling the throttling refrigeration temperature is achieved, when the sealing cover is applied to the refrigeration type detector, the coke temperature of the detector can be stably controlled, and the imaging stability of a chip is ensured.
Further preferably, as shown in fig. 3, there are a plurality of the exhaust passages 8, the covers 15 are correspondingly configured in a plurality, that is, the covers 15 and the exhaust passages 8 are the same in number and are configured in a one-to-one correspondence, and each exhaust passage 8 is communicated with the expansion cavity; it is further preferred to provide that the exhaust ducts 8 are arranged uniformly spaced around the central axis of the mandrel 12. Adopt a plurality of exhaust passage 8, on the one hand can guarantee that the throttle refrigerator is evenly given vent to anger, improves the job stabilization nature of throttle refrigerator, and on the other hand, when one of them or several accuse temperature structure (being the structure that elastic component 7+ closing cap 15 constitute) were out of order, other accuse temperature structure can normally work to guarantee this throttle refrigerator's operational reliability.
Further preferably, as shown in fig. 1 and 2, a mounting block 5 is detachably fixed in the exhaust channel 8, one end of the elastic member 7 is fixedly connected with the inner surface of the cover 15, and the other end of the elastic member 7 is fixedly connected with the mounting block 5, which can facilitate the installation and maintenance of the equipment, and can replace different elastic members 7 and the like according to the requirement, and in one embodiment, the mounting block 5 can be fixed in the exhaust channel 8 through a bolt 6 and the like.
It will be appreciated that by adjusting the initial force of the resilient member 7 on the cover 15, adjustment of the set back pressure, or control of different refrigeration temperatures, can be achieved. In one embodiment, the adjustment can be achieved by adjusting the spring constant of the spring element 7. In another embodiment, the adjustment can be achieved by adjusting the initial deformation of the elastic member 7, for example, the installation position of the elastic member 7 can be adjusted; in one specific embodiment, a mounting block 5 is slidably disposed in the exhaust passage 8, one end of the elastic member 7 is fixedly connected to the inner surface of the sealing cover 15, and the other end of the elastic member is fixedly connected to the mounting block 5, a screw is disposed on the mounting block 5, a kidney-shaped groove is correspondingly formed in the flange 16, the length direction of the kidney-shaped groove is parallel to the expansion direction of the elastic member 7, the screw penetrates through the kidney-shaped groove and is locked by a nut, the initial deformation of the elastic member 7 can be adjusted by changing the position of the screw in the kidney-shaped groove, and the screw is locked by the nut after being adjusted to a target position.
In addition, the embodiment of the present invention also provides a detector, which includes the above-mentioned throttling refrigerator, the other components of the detector and the connection structure between the above-mentioned throttling refrigerator and the other components (for example, a detector chip) are conventional in the art, and specifically, as shown in fig. 1, one end of the above-mentioned cold finger 11, which is far away from the flange 16, is provided with a cold plate 14, and the detector chip is mounted on the cold plate 14.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.
Claims (10)
1. The utility model provides a can realize initiative accuse temperature and quick cryogenic throttling refrigeration ware, includes dabber, cold finger, flange and heat exchange tube, be equipped with throttling components and parts on the heat exchange tube, its characterized in that: the cold finger sleeve is arranged outside the mandrel and surrounds the mandrel to form an expansion cavity, the heat exchange tube is wound on the outer wall of the mandrel and is communicated with the expansion cavity through the throttling element, the flange is connected with the cold finger and seals the expansion cavity, and an air inlet channel communicated with the heat exchange tube and an air outlet channel communicated with the expansion cavity are arranged in the flange;
the sealing cover is movably covered at the outlet end of the exhaust passage through the limitation of an elastic piece, and the other end of the elastic piece is fixed on the flange.
2. The throttle refrigerator capable of realizing active temperature control and quick refrigeration according to claim 1, wherein: the exhaust passage has a plurality ofly, the closing cap is disposed in the pluralityof correspondence, each exhaust passage all leads to with the expansion chamber.
3. The throttle refrigerator capable of realizing active temperature control and quick refrigeration according to claim 2, wherein: the exhaust passages are arranged around the central axis of the mandrel at uniform intervals.
4. The throttle refrigerator capable of realizing active temperature control and quick refrigeration according to claim 1, wherein: the elastic piece is accommodated in the exhaust passage, and the sealing cover is detachably covered at the outlet end of the exhaust passage.
5. The throttle refrigerator capable of realizing active temperature control and quick refrigeration according to claim 4, wherein: the exhaust passage is internally and detachably fixed with a mounting block, one end of the elastic piece is fixedly connected with the inner surface of the sealing cover, and the other end of the elastic piece is fixedly connected with the mounting block.
6. The throttle refrigerator capable of realizing active temperature control and quick refrigeration according to claim 4, wherein: an installation block is arranged in the exhaust channel in a sliding mode, one end of the elastic piece is fixedly connected with the inner surface of the sealing cover, and the other end of the elastic piece is fixedly connected with the installation block; the mounting block is provided with a screw rod, a kidney-shaped groove is correspondingly formed in the flange, the length direction of the kidney-shaped groove is parallel to the telescopic direction of the elastic piece, and the screw rod penetrates out of the kidney-shaped groove and is locked through a nut.
7. The throttle refrigerator capable of realizing active temperature control and quick refrigeration according to any one of claims 1 to 6, wherein: the elastic piece is a spring.
8. The throttle refrigerator capable of realizing active temperature control and quick refrigeration according to claim 1, wherein: the cold finger is coaxially sleeved outside the mandrel.
9. The throttle refrigerator capable of realizing active temperature control and quick refrigeration according to claim 1 or 8, wherein: the mandrel is a frustum-shaped mandrel, and the cold finger is a frustum-shaped cold finger.
10. A probe, characterized by: the throttle refrigerator capable of realizing active temperature control and quick refrigeration comprises the throttle refrigerator capable of realizing active temperature control and quick refrigeration according to any one of claims 1 to 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010256503.0A CN111536713B (en) | 2020-04-02 | 2020-04-02 | Throttling refrigerator and detector capable of realizing active temperature control and quick refrigeration |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010256503.0A CN111536713B (en) | 2020-04-02 | 2020-04-02 | Throttling refrigerator and detector capable of realizing active temperature control and quick refrigeration |
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| Publication Number | Publication Date |
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| CN111536713A CN111536713A (en) | 2020-08-14 |
| CN111536713B true CN111536713B (en) | 2021-07-13 |
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| CN202010256503.0A Active CN111536713B (en) | 2020-04-02 | 2020-04-02 | Throttling refrigerator and detector capable of realizing active temperature control and quick refrigeration |
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Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112816076A (en) * | 2020-12-30 | 2021-05-18 | 武汉高芯科技有限公司 | Throttling refrigeration infrared detector capable of realizing coke temperature adjustment |
| CN114562825A (en) * | 2022-02-28 | 2022-05-31 | 武汉高芯科技有限公司 | High-overload-resistant throttling refrigerator |
| CN115127248B (en) * | 2022-07-08 | 2024-05-24 | 武汉高芯科技有限公司 | Method and system for reducing refrigeration temperature of throttling refrigerator |
Family Cites Families (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5692379A (en) * | 1995-06-07 | 1997-12-02 | Hughes Aircraft Company | Long term thermally stable cryostat |
| CN204268747U (en) * | 2014-12-01 | 2015-04-15 | 洪霖 | A kind of micro-miniature refrigerator with coiled heat exchanger tube |
| CN204345962U (en) * | 2014-12-09 | 2015-05-20 | 中国电子科技集团公司第十六研究所 | A kind of taper quick throttle refrigerator |
| US10082319B2 (en) * | 2015-10-15 | 2018-09-25 | Raytheon Company | Joule Thomson aided Stirling cycle cooler |
| CN106091462B (en) * | 2016-06-08 | 2019-01-29 | 西安交通大学 | A kind of self-adjustable throttling refrigerator using memory metal alloy |
| CN207703339U (en) * | 2017-09-15 | 2018-08-07 | 武汉高芯科技有限公司 | Refrigeration mode Dewar component |
| CN209589250U (en) * | 2018-12-29 | 2019-11-05 | 武汉高德红外股份有限公司 | Refrigerated infrared detector and infrared equipment |
| CN110274404A (en) * | 2019-05-15 | 2019-09-24 | 中国电子科技集团公司第十一研究所 | Bellows self-adjustable J-T refrigerator |
| CN110425768A (en) * | 2019-07-30 | 2019-11-08 | 中国电子科技集团公司第十一研究所 | Taper throttling refrigerator |
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Inventor after: Huang Li Inventor after: Li Xiaoyong Inventor after: Wang Libao Inventor after: Wang Ling Inventor after: Huang Taihe Inventor after: Huang Xuanjia Inventor before: Li Xiaoyong Inventor before: Wang Libao Inventor before: Wang Ling Inventor before: Huang Taihe Inventor before: Huang Xuanjia |
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