CN114739115A - Low-temperature gas liquefying device - Google Patents

Low-temperature gas liquefying device Download PDF

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Publication number
CN114739115A
CN114739115A CN202210535000.6A CN202210535000A CN114739115A CN 114739115 A CN114739115 A CN 114739115A CN 202210535000 A CN202210535000 A CN 202210535000A CN 114739115 A CN114739115 A CN 114739115A
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CN
China
Prior art keywords
low
temperature
refrigerator
liquid
gas
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.)
Pending
Application number
CN202210535000.6A
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Chinese (zh)
Inventor
陈杰
胡咸军
许红
张�诚
段罗斌
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Csic Pride Nanjing Cryogenic Technology Co ltd
Original Assignee
Csic Pride Nanjing Cryogenic Technology Co ltd
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Application filed by Csic Pride Nanjing Cryogenic Technology Co ltd filed Critical Csic Pride Nanjing Cryogenic Technology Co ltd
Priority to CN202210535000.6A priority Critical patent/CN114739115A/en
Publication of CN114739115A publication Critical patent/CN114739115A/en
Pending legal-status Critical Current

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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
    • F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
    • F25J1/00—Processes or apparatus for liquefying or solidifying gases or gaseous mixtures
    • F25J1/0002—Processes or apparatus for liquefying or solidifying gases or gaseous mixtures characterised by the fluid to be liquefied
    • F25J1/0005—Light or noble gases
    • F25J1/0007—Helium
    • 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
    • F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
    • F25J1/00—Processes or apparatus for liquefying or solidifying gases or gaseous mixtures
    • F25J1/02—Processes or apparatus for liquefying or solidifying gases or gaseous mixtures requiring the use of refrigeration, e.g. of helium or hydrogen ; Details and kind of the refrigeration system used; Integration with other units or processes; Controlling aspects of the process
    • F25J1/0201—Processes or apparatus for liquefying or solidifying gases or gaseous mixtures requiring the use of refrigeration, e.g. of helium or hydrogen ; Details and kind of the refrigeration system used; Integration with other units or processes; Controlling aspects of the process using only internal refrigeration means, i.e. without external refrigeration
    • F25J1/0202—Processes or apparatus for liquefying or solidifying gases or gaseous mixtures requiring the use of refrigeration, e.g. of helium or hydrogen ; Details and kind of the refrigeration system used; Integration with other units or processes; Controlling aspects of the process using only internal refrigeration means, i.e. without external refrigeration in a quasi-closed internal refrigeration loop
    • 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
    • F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
    • F25J1/00—Processes or apparatus for liquefying or solidifying gases or gaseous mixtures
    • F25J1/0002—Processes or apparatus for liquefying or solidifying gases or gaseous mixtures characterised by the fluid to be liquefied
    • F25J1/0005—Light or noble gases
    • 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
    • F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
    • F25J1/00—Processes or apparatus for liquefying or solidifying gases or gaseous mixtures
    • F25J1/0002—Processes or apparatus for liquefying or solidifying gases or gaseous mixtures characterised by the fluid to be liquefied
    • F25J1/0005—Light or noble gases
    • F25J1/001—Hydrogen
    • 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
    • F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
    • F25J1/00—Processes or apparatus for liquefying or solidifying gases or gaseous mixtures
    • F25J1/003—Processes or apparatus for liquefying or solidifying gases or gaseous mixtures characterised by the kind of cold generation within the liquefaction unit for compensating heat leaks and liquid production
    • F25J1/0032—Processes or apparatus for liquefying or solidifying gases or gaseous mixtures characterised by the kind of cold generation within the liquefaction unit for compensating heat leaks and liquid production using the feed stream itself or separated fractions from it, i.e. "internal refrigeration"
    • F25J1/004—Processes or apparatus for liquefying or solidifying gases or gaseous mixtures characterised by the kind of cold generation within the liquefaction unit for compensating heat leaks and liquid production using the feed stream itself or separated fractions from it, i.e. "internal refrigeration" by flash gas recovery
    • 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
    • F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
    • F25J1/00—Processes or apparatus for liquefying or solidifying gases or gaseous mixtures
    • F25J1/02—Processes or apparatus for liquefying or solidifying gases or gaseous mixtures requiring the use of refrigeration, e.g. of helium or hydrogen ; Details and kind of the refrigeration system used; Integration with other units or processes; Controlling aspects of the process
    • F25J1/0225—Processes or apparatus for liquefying or solidifying gases or gaseous mixtures requiring the use of refrigeration, e.g. of helium or hydrogen ; Details and kind of the refrigeration system used; Integration with other units or processes; Controlling aspects of the process using other external refrigeration means not provided before, e.g. heat driven absorption chillers
    • F25J1/0227—Processes or apparatus for liquefying or solidifying gases or gaseous mixtures requiring the use of refrigeration, e.g. of helium or hydrogen ; Details and kind of the refrigeration system used; Integration with other units or processes; Controlling aspects of the process using other external refrigeration means not provided before, e.g. heat driven absorption chillers within a refrigeration cascade
    • 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
    • F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
    • F25J2215/00—Processes characterised by the type or other details of the product stream
    • F25J2215/32—Neon
    • 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
    • F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
    • F25J2270/00—Refrigeration techniques used
    • F25J2270/90—External refrigeration, e.g. conventional closed-loop mechanical refrigeration unit using Freon or NH3, unspecified external refrigeration
    • F25J2270/908—External refrigeration, e.g. conventional closed-loop mechanical refrigeration unit using Freon or NH3, unspecified external refrigeration by regenerative chillers, i.e. oscillating or dynamic systems, e.g. Stirling refrigerator, thermoelectric ("Peltier") or magnetic refrigeration

Abstract

The invention discloses a low-temperature gas liquefying device, which comprises a gas supplementing system and a refrigerating machine integrated in a vacuum cover, wherein the refrigerating machine is a multi-stage refrigerating machine, and a low-temperature throttling device is arranged in the vacuum cover; the low-temperature part at the bottom of the last cylinder of the refrigerator or close to the bottom is provided with a hole and is connected with a low-temperature throttling device, the low-temperature throttling device is used for throttling low-temperature gas in the cylinder into low-temperature liquid or gas-liquid two-phase fluid, and the low-temperature liquid or the gas-liquid two-phase fluid is discharged through a liquid conveying pipe; the bottom of the vacuum cover is provided with a vacuum sleeve which covers the infusion tube; the air supply system comprises a compressor, wherein the outlet of the compressor is connected with the refrigerator through an air pipe, and the inlet of the compressor is connected with the refrigerator through an air return pipe; the inlet or the outlet of the compressor is connected with an air inlet pipeline, and a flow control valve is arranged on the air inlet pipeline; the air make-up system is used for supplementing liquefied gas into the refrigerator. The invention has high cold utilization efficiency and liquefaction efficiency and is easy to produce and manufacture.

Description

Low-temperature gas liquefying device
Technical Field
The invention belongs to low-temperature refrigeration equipment, and particularly relates to a low-temperature gas liquefying device.
Background
Many low-temperature experiments (such as material comprehensive physical property measurement, condensed state physical experiments, chemical field research, superconducting magnet research, nuclear magnetic resonance and the like) carried out by various colleges and universities and scientific research institutions in China need to be soaked by liquid helium, liquid hydrogen or liquid neon to provide the required low-temperature test environment. Under normal pressure, the saturation temperatures of liquid helium, liquid hydrogen and liquid neon are-269 ℃, 252.8 ℃ and 246 ℃, respectively, which are difficult to liquefy gas. The traditional rare gas liquefaction device adopts a small-sized low-temperature refrigerator as a cold source, but the small-sized low-temperature refrigerator has limited cold quantity which can be provided at low temperature, and how to ensure the utilization efficiency of the cold quantity is the key of rare gas liquefaction.
In order to fully utilize the refrigeration capacity of the refrigerator to liquefy helium, a heat exchange structure is generally provided on the cylinder and the cold head of the refrigerator to fully utilize the refrigeration capacity of the cylinder and the cold head. After entering a cold box of the liquefier, helium at normal temperature sequentially passes through a heat exchanger on the primary cylinder, a heat exchanger of the primary cold head, a heat exchanger of the secondary cylinder and a heat exchanger of the secondary cold head, and is finally condensed into liquid helium at the position of the secondary cold head. The heat exchanger on the cylinder is usually connected with the cylinder in a coil pipe welding mode; the heat exchanger on the cold head is made of oxygen-free copper and is connected with the cold head in a compression joint conduction mode. The cylinder is easy to deform in the mode of welding the cylinder upper coil, and the performance of the refrigerator is influenced, so that the manufacturing difficulty of the cylinder upper heat exchanger is high; the contact area between the coil pipe and the cylinder is small, and the heat exchange is insufficient; the cold energy of the cold helium in the cylinder is led out through the stainless steel cylinder wall and then is transmitted to the helium in the coil pipe through the coil pipe, and the heat exchange temperature difference of the transmission mode is large and the efficiency is low. For the heat exchanger which is pressed on the cold head of the refrigerator, the problems of large contact thermal resistance of the pressing connection, heat exchange temperature difference and insufficient utilization of the cold energy of the refrigerator exist. The above problems lead to difficulty in manufacturing the helium liquefier and low liquefaction rate; other noble gas liquefaction plants suffer from the same problems as described above.
Disclosure of Invention
The purpose of the invention is as follows: the invention aims to provide a low-temperature gas liquefying device which is high in liquefying efficiency and easy to produce and manufacture, aiming at the problems that a cylinder heat exchanger is difficult to manufacture, the cold energy is not fully utilized, the heat exchange temperature difference between the cylinder heat exchanger and a cold head or a cylinder is large and the like in the traditional low-temperature gas liquefying device.
The technical scheme is as follows: the low-temperature gas liquefaction device comprises a refrigerator integrated in a vacuum cover and a gas supplementing system; the refrigerator is a multi-stage refrigerator, and a low-temperature throttling device is arranged in the vacuum cover; the low-temperature part at the bottom of the last cylinder of the refrigerator or close to the bottom is provided with a hole and is connected with a low-temperature throttling device, the low-temperature throttling device is used for throttling low-temperature gas in the cylinder into low-temperature liquid or gas-liquid two-phase fluid, and the low-temperature liquid or gas-liquid two-phase fluid is discharged through a liquid conveying pipe; the gas supplementing system is used for supplementing liquefied gas into the refrigerator.
According to the invention, liquefied gas is directly throttled at the bottom of the cylinder of the refrigerator or at a low-temperature position close to the bottom through the low-temperature throttling device, a cylinder heat exchanger and a cold head heat exchanger are not required to be arranged, the low-temperature gas does not need to be subjected to heat exchange on the cylinder of the refrigerator and a primary and secondary cold head step by step, heat exchange loss and heat exchange temperature difference are avoided, the utilization efficiency of cold energy can be improved, and a higher liquefaction rate is obtained; on the other hand, the damage of the winding welding coil pipe to the cylinder is avoided, the structure of the liquefying device is simpler, and the difficulty of production and manufacturing is reduced.
Furthermore, the air supply system comprises a compressor, the outlet of the compressor is connected with the refrigerator through an air pipe, and the inlet of the compressor is connected with the refrigerator through an air return pipe; the inlet or the outlet of the compressor is connected with an air inlet pipeline, namely the air inlet pipeline is supplemented from the inlet or the outlet of the compressor. The air inlet pipeline is supplemented with helium, hydrogen or neon, which is a conventional low-temperature cooling medium.
Furthermore, a flow control valve is arranged on the air inlet pipeline to realize the control of air inflow.
Furthermore, the refrigerating machine is a two-stage refrigerating machine, and a low-temperature part at the bottom of the two-stage cylinder or close to the bottom is provided with a hole and is connected with the low-temperature throttling device.
Furthermore, a cold shield is arranged in the vacuum cover and is connected with the first-stage cold head in a cold conduction mode so as to reduce radiation heat leakage of the vacuum cover to the second-stage air cylinder and the second-stage cold head. The cold shield can be made of aluminum or copper, so that good thermal contact between the cold shield and the primary cold head is ensured.
Furthermore, the refrigerating machine is a primary refrigerating machine, and a low-temperature part at the bottom of the primary cylinder or close to the bottom is provided with a hole and is connected with the low-temperature throttling device.
Further, the low-temperature throttling device adopts a low-temperature capillary tube or a low-temperature valve.
Furthermore, the bottom of the vacuum cover is provided with a vacuum sleeve which covers the infusion tube, so that on one hand, the heat loss of liquid in the infusion tube is avoided, on the other hand, the vacuum state in the vacuum cover is ensured, and the heat leakage of the refrigerator from the outside is reduced.
Has the advantages that: compared with the prior art, the invention has the following remarkable advantages: the cold utilization efficiency is high, the liquefaction efficiency is high, and the production and the manufacture are easy.
Drawings
FIG. 1 is a schematic diagram of a cryogenic gas liquefaction plant according to a first embodiment;
FIG. 2 is a schematic view showing the structure of a cryogenic gas liquefaction plant according to a second embodiment;
FIG. 3 is a schematic structural view of a cryogenic gas liquefaction plant according to a third embodiment.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings.
Example one
Fig. 1 shows a cryogenic gas liquefaction plant in which the refrigerator 6 is a two-stage refrigerator, integrated as a cold source in the vacuum enclosure 7. The inside of the vacuum cover 7 is provided with a cold screen 11, and the cold screen 11 is connected with the primary cold head 6-2 in a cold conduction mode, so that the temperature of the cold screen 11 is maintained between 20 and 100K. The bottom of the second-stage cylinder 6-3 is provided with a hole and is connected with a low-temperature throttling device 8. In the liquefaction stage, the low-temperature gas at the bottom of the secondary cylinder 6-3 is throttled by the low-temperature throttling device 8 to obtain low-temperature liquid, the low-temperature liquid is output to a low-temperature liquid storage container through a liquid conveying pipe 9, and the liquid conveying pipe 9 is covered by a vacuum sleeve 10 arranged at the bottom of the vacuum cover 7. The consumption of the liquefaction process is supplemented by high-purity gas provided from the outside, and the high-purity gas is supplemented by a gas supplementing system. Specifically, air supplement system includes compressor 3, and the export of compressor 3 passes through gas-supply pipe 4 and links to each other with refrigerator 6, and compressor 3's import passes through muffler 5 and links to each other with refrigerator 6, and compressor 3's access connection has air inlet pipeline 1, is equipped with flow control valve 2 on the air inlet pipeline 1. High-purity gas enters an inlet of the compressor 3 through the flow control valve 2, is conveyed to the refrigerator 6 through the gas conveying pipe 4 after being compressed, and returns to the inlet of the compressor 3 through the gas return pipe 5 after being adiabatically expanded in the refrigerator 6, and the gas is circulated in sequence.
Example two
As shown in fig. 2, the second embodiment is substantially the same as the first embodiment except that: the low-temperature part of the secondary cylinder 6-3 close to the bottom is provided with a hole and is connected with a low-temperature throttling device 8.
EXAMPLE III
As shown in fig. 3, the third embodiment is substantially the same as the first embodiment except that: the refrigerating machine 6 is a single-stage refrigerating machine, and the bottom of the first-stage cylinder 6-1 is provided with a hole and is connected with the low-temperature throttling device 8. While no cold shield 11 is provided in the vacuum enclosure 7.
In the above embodiment, the refrigerator may be a GM refrigerator, a pulse tube refrigerator, or a stirling refrigerator.

Claims (8)

1. A cryogenic gas liquefaction device comprising a refrigerator (6) integrated in a vacuum enclosure (7), characterized in that: also comprises an air supply system; the refrigerator (6) is a multi-stage refrigerator, and a low-temperature throttling device (8) is arranged in the vacuum cover (7); a low-temperature part at the bottom of a last-stage cylinder of the refrigerator (6) or close to the bottom is provided with a hole and is connected with a low-temperature throttling device (8), the low-temperature throttling device (8) is used for throttling low-temperature gas in the cylinder into low-temperature liquid or gas-liquid two-phase fluid, and the low-temperature liquid or gas-liquid two-phase fluid is discharged through a liquid conveying pipe (9); the gas supplementing system is used for supplementing liquefied gas into the refrigerating machine (6).
2. The cryogenic gas liquefaction device of claim 1, characterized in that: the air supply system comprises a compressor (3), the outlet of the compressor (3) is connected with a refrigerator (6) through an air conveying pipe (4), and the inlet of the compressor (3) is connected with the refrigerator (6) through an air return pipe (5); the inlet or the outlet of the compressor (3) is connected with an air inlet pipeline (1).
3. The cryogenic gas liquefaction device according to claim 2, characterized in that: the air inlet pipeline (1) is provided with a flow control valve (2).
4. The cryogenic gas liquefaction device of claim 1, characterized in that: the refrigerating machine (6) is a two-stage refrigerating machine, and the bottom of the two-stage cylinder (6-3) or the low-temperature part close to the bottom is provided with a hole and is connected with the low-temperature throttling device (8).
5. The cryogenic gas liquefaction device according to claim 4, characterized in that: the vacuum cover (7) is internally provided with a cold screen (11), and the cold screen (11) is connected with the primary cold head (6-2) in a cold conduction manner and used for reducing the radiation heat leakage of the vacuum cover (7) to the secondary cylinder (6-3) and the secondary cold head (6-4).
6. The cryogenic gas liquefaction device of claim 1, characterized in that: the refrigerating machine (6) is a primary refrigerating machine, and a low-temperature part at the bottom or close to the bottom of the primary cylinder (6-1) is provided with a hole and is connected with a low-temperature throttling device (8).
7. The cryogenic gas liquefaction device according to any of claims 1 to 6, characterized in that: the low-temperature throttling device (8) adopts a low-temperature capillary tube or a low-temperature valve.
8. The cryogenic gas liquefaction device of claim 1, characterized in that: the bottom of the vacuum cover (7) is provided with a vacuum sleeve (10), and the vacuum sleeve (10) covers the infusion tube (9).
CN202210535000.6A 2022-05-17 2022-05-17 Low-temperature gas liquefying device Pending CN114739115A (en)

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Application Number Priority Date Filing Date Title
CN202210535000.6A CN114739115A (en) 2022-05-17 2022-05-17 Low-temperature gas liquefying device

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN115682629A (en) * 2022-09-27 2023-02-03 华中科技大学 External hanging type small helium liquefier

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS62181852U (en) * 1986-05-12 1987-11-18
JP2003214764A (en) * 2002-01-25 2003-07-30 Japan Science & Technology Corp High performance helium gas refining device
CN105571190A (en) * 2016-01-06 2016-05-11 复旦大学 Mechanical vibration isolation liquid-helium-consumption-free extremely-low-temperature refrigerating system
CN106524554A (en) * 2016-12-14 2017-03-22 费勉仪器科技（上海）有限公司 Compact type liquid-helium-free 1K low-temperature refrigeration device suitable for ultrahigh vacuum environment
CN206377880U (en) * 2016-12-14 2017-08-04 费勉仪器科技（上海）有限公司 Suitable for ultra-high vacuum environment compact without liquid helium 1K cryogenic refrigerating units
CN108800384A (en) * 2018-06-27 2018-11-13 广东Tcl智能暖通设备有限公司 Air-conditioning system and air conditioner
CN108870821A (en) * 2018-06-27 2018-11-23 中国科学院理化技术研究所 It is a kind of using refrigeration machine as the sub-cooled equipment of cold source

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS62181852U (en) * 1986-05-12 1987-11-18
JP2003214764A (en) * 2002-01-25 2003-07-30 Japan Science & Technology Corp High performance helium gas refining device
CN105571190A (en) * 2016-01-06 2016-05-11 复旦大学 Mechanical vibration isolation liquid-helium-consumption-free extremely-low-temperature refrigerating system
CN106524554A (en) * 2016-12-14 2017-03-22 费勉仪器科技（上海）有限公司 Compact type liquid-helium-free 1K low-temperature refrigeration device suitable for ultrahigh vacuum environment
CN206377880U (en) * 2016-12-14 2017-08-04 费勉仪器科技（上海）有限公司 Suitable for ultra-high vacuum environment compact without liquid helium 1K cryogenic refrigerating units
CN108800384A (en) * 2018-06-27 2018-11-13 广东Tcl智能暖通设备有限公司 Air-conditioning system and air conditioner
CN108870821A (en) * 2018-06-27 2018-11-23 中国科学院理化技术研究所 It is a kind of using refrigeration machine as the sub-cooled equipment of cold source

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN115682629A (en) * 2022-09-27 2023-02-03 华中科技大学 External hanging type small helium liquefier
CN115682629B (en) * 2022-09-27 2024-04-19 华中科技大学 Externally-hung small helium liquefier

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