CN217031660U - Liquid nitrogen-based refrigerating system for liquid xenon dark substance detector - Google Patents
Liquid nitrogen-based refrigerating system for liquid xenon dark substance detector Download PDFInfo
- Publication number
- CN217031660U CN217031660U CN202220482970.XU CN202220482970U CN217031660U CN 217031660 U CN217031660 U CN 217031660U CN 202220482970 U CN202220482970 U CN 202220482970U CN 217031660 U CN217031660 U CN 217031660U
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- China
- Prior art keywords
- liquid nitrogen
- liquid
- xenon
- container
- nitrogen container
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- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 title claims abstract description 238
- 239000007788 liquid Substances 0.000 title claims abstract description 135
- 229910052757 nitrogen Inorganic materials 0.000 title claims abstract description 118
- 229910052724 xenon Inorganic materials 0.000 title claims abstract description 26
- FHNFHKCVQCLJFQ-UHFFFAOYSA-N xenon atom Chemical compound [Xe] FHNFHKCVQCLJFQ-UHFFFAOYSA-N 0.000 title claims abstract description 26
- 239000000126 substance Substances 0.000 title claims abstract description 9
- 239000004020 conductor Substances 0.000 claims abstract description 34
- 238000009413 insulation Methods 0.000 claims abstract description 15
- 238000005057 refrigeration Methods 0.000 claims description 25
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 6
- 229910052802 copper Inorganic materials 0.000 claims description 6
- 239000010949 copper Substances 0.000 claims description 6
- APFVFJFRJDLVQX-UHFFFAOYSA-N indium atom Chemical compound [In] APFVFJFRJDLVQX-UHFFFAOYSA-N 0.000 claims description 4
- 239000002470 thermal conductor Substances 0.000 claims description 2
- 230000000694 effects Effects 0.000 abstract description 7
- 238000004519 manufacturing process Methods 0.000 abstract description 5
- 230000007774 longterm Effects 0.000 abstract description 4
- 238000012423 maintenance Methods 0.000 description 4
- 229910001873 dinitrogen Inorganic materials 0.000 description 2
- 238000002474 experimental method Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000012546 transfer Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000002309 gasification Methods 0.000 description 1
- 229910052738 indium Inorganic materials 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000035945 sensitivity Effects 0.000 description 1
- 239000013589 supplement Substances 0.000 description 1
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Abstract
The utility model discloses a liquid nitrogen-based refrigerating system for a liquid xenon dark substance detector, which comprises a liquid nitrogen container, a vacuum heat insulation cover, a heat conductor and a heat source cold head, wherein liquid nitrogen is contained in the liquid nitrogen container, a liquid nitrogen inlet pipe and a nitrogen outlet pipe are arranged on the liquid nitrogen container, one end of the heat conductor penetrates through the bottom of the liquid nitrogen container to be contacted with the liquid nitrogen, and the other end of the heat conductor is connected with the heat source cold head; the liquid nitrogen container, the heat conductor and the heat source cold head are positioned in the vacuum heat insulation cover, and the liquid nitrogen inlet pipe and the nitrogen outlet pipe penetrate through the vacuum heat insulation cover. The refrigerating system has the advantages of high refrigerating power, stable refrigerating effect, low manufacturing cost and no vibration part, and increases the stability of the equipment for long-term use.
Description
Technical Field
The utility model relates to the technical field of refrigerating devices, in particular to a liquid nitrogen-based refrigerating system for a liquid xenon dark substance detector.
Background
There are many unknown areas for dark matter detection in current international physics, and the liquid xenon dark matter detector is relatively the leading one in terms of sensitivity for detecting dark matter. With the gradual increase of the volume of the liquid xenon detector, from dozens of kilograms to dozens of tons, higher requirements are also put forward on a refrigeration system of the liquid xenon detector, and the requirements of long service life, long-term stability and low background are met. However, the current commercial pulse tube and GM refrigerator is obviously insufficient in refrigerating capacity for the liquid xenon detector of the tens of tons, and the refrigerating power is limited, so that the improvement is difficult to continue. In addition, the commercial pulse tube and GM refrigerator have many production processes, high production cost, difficult maintenance and high maintenance cost. The development of such experiments has been greatly limited by the refrigeration system of the commercial refrigerator, and for this reason, it is required to provide a high-power and high-stability refrigeration system.
Accordingly, those skilled in the art have endeavored to provide a liquid nitrogen-based refrigeration system for a liquid xenon dark matter detector that has a wide range of refrigeration power at liquid xenon temperatures, high stability, and easy replacement and maintenance.
SUMMERY OF THE UTILITY MODEL
In view of the defects in the prior art, the technical problem to be solved by the present invention is how to provide a refrigeration system with a large refrigeration power range, high stability and easy replacement and maintenance.
In order to achieve the purpose, the utility model provides a liquid nitrogen-based refrigerating system for a liquid xenon dark substance detector, which comprises a liquid nitrogen container, a vacuum heat insulation cover, a heat conductor and a heat source cold head, wherein liquid nitrogen is contained in the liquid nitrogen container, the liquid nitrogen container is provided with a liquid nitrogen inlet pipe and a nitrogen outlet pipe, one end of the heat conductor penetrates through the bottom of the liquid nitrogen container to be contacted with the liquid nitrogen, and the other end of the heat conductor is connected with the heat source cold head; the liquid nitrogen container, the heat conductor and the heat source cold head are positioned in the vacuum heat insulation cover, and the liquid nitrogen inlet pipe and the nitrogen outlet pipe penetrate through the vacuum heat insulation cover.
Preferably, the volume of the liquid nitrogen is half of the volume of the liquid nitrogen container.
Preferably, the thermal conductor is oxygen-free copper.
Preferably, the heat source cold head is oxygen-free copper.
Preferably, a heater is arranged on the heat source cold head.
Preferably, the heat conductor and the liquid nitrogen container are sealed through indium wires.
Preferably, a temperature sensor is arranged on the outer wall of the liquid nitrogen container.
Preferably, the number of the temperature sensors is 3 from top to bottom along the outer wall of the liquid nitrogen container.
Preferably, the volume of the liquid nitrogen container is 5-10L.
Preferably, the liquid nitrogen inlet pipe is connected with an external liquid nitrogen tank.
The utility model has at least the following beneficial technical effects:
the liquid nitrogen-based refrigerating system for the liquid xenon dark substance detector provided by the utility model takes liquid nitrogen as a cold source, so that the refrigerating power is high, and the refrigerating effect is stable; the heat conductor can be provided with different size structures according to different working conditions, so that standardization and modularization can be realized; the refrigerating system is low in manufacturing cost, has no vibration part, and improves the stability of the equipment in long-term use.
The conception, specific structure and technical effects of the present invention will be further described in conjunction with the accompanying drawings to fully understand the purpose, characteristics and effects of the present invention.
Drawings
Fig. 1 is a schematic structural view of a refrigeration system according to a preferred embodiment of the present invention.
The device comprises a nitrogen outlet pipe 1, a liquid nitrogen inlet pipe 2, a vacuum heat insulation cover 3, a liquid nitrogen container 4, a temperature sensor 5, a heat conductor 6, an indium wire 7 and a heat source cold head 8.
Detailed Description
The technical contents of the preferred embodiments of the present invention will be more clearly and easily understood by referring to the drawings attached to the specification. The present invention may be embodied in many different forms of embodiments and the scope of the utility model is not limited to the embodiments set forth herein.
In the drawings, structurally identical elements are represented by like reference numerals, and structurally or functionally similar elements are represented by like reference numerals throughout the several views. The size and thickness of each component shown in the drawings are arbitrarily illustrated, and the present invention is not limited to the size and thickness of each component. The thickness of the components has been exaggerated in some places in the drawings where appropriate for clarity of illustration.
The utility model provides a liquid nitrogen-based refrigerating system for a liquid xenon dark substance detector, which takes liquid nitrogen as a cold source and can provide different refrigerating powers at the temperature of liquid xenon.
As shown in fig. 1, the liquid nitrogen-based refrigeration system for the liquid xenon dark substance detector of the present embodiment includes a liquid nitrogen container 4, a vacuum heat shield 3, a heat conductor 6 and a heat source cold head 8.
The heat conductor 6 is made of a material with high thermal conductivity, specifically, oxygen-free copper, and the heat conductor 6 may also be in the shape of a cylinder. As shown in fig. 1, one end of the heat conductor 6 is placed in the liquid nitrogen container 4 through the bottom of the liquid nitrogen container 4, and is in contact with the liquid nitrogen; the other end of the heat conductor 6 is placed outside the liquid nitrogen container 4. The heat conductor 6 can transfer the cold energy of the liquid nitrogen in the liquid nitrogen container 4 to the outside of the liquid nitrogen container 4, thereby playing a role in refrigeration.
In order to increase the contact area of the heat conductor 6 and the liquid nitrogen, the end part of the heat conductor 6 positioned in the liquid nitrogen is cut into a tooth shape so as to improve the heat transfer effect.
In order to avoid leakage, the heat conductor 6 is arranged outside the liquid nitrogen container 4 and is provided with a flange sheet along the circumferential direction, and the flange sheet of the heat conductor 6 is sealed with the liquid nitrogen container 4 by an indium wire 7. This kind of connected mode between heat conductor 6 and the liquid nitrogen container 4 is convenient for heat conductor 6's change, makes heat conductor 6 can be equipped with different size structures according to different operating modes, and it is easy to make the equipment to can realize standardization and modularization, it is convenient to maintain.
The other end of the heat conductor 6, which is positioned outside the liquid nitrogen container 4, is connected with a heat source cold head 8, and cold energy is transmitted outwards through the heat source cold head 8. The heat source cold head 8 can be provided with heaters with different powers according to the requirements of working conditions, and can accurately adjust the refrigeration power within a certain range and keep the refrigeration power stable. The heat source cold head 8 may also be made of a material having high thermal conductivity, specifically, oxygen-free copper. The heat source cold head 8 and the heat conductor 6 can be connected by bolts, pins and the like.
The vacuum heat insulation cover 3 is covered outside the liquid nitrogen container 4, the heat conductor 6 and the heat source cold head 8, the vacuum heat insulation cover 3 can isolate the liquid nitrogen container 4, the heat conductor 6 and the heat source cold head 8 from external heat transmission, and the influence of the environment on a refrigerating system is reduced. As shown in fig. 1, in order to achieve connection with the outside, a liquid nitrogen inlet pipe 2 and a nitrogen outlet pipe 1 each penetrate through a vacuum heat shield 3.
The bottom or the side wall of the liquid nitrogen container 4 can be provided with a supporting piece, and the supporting piece is connected with the bottom or the side face of the vacuum heat insulation cover 3 to realize the fixation of the liquid nitrogen container 4 in the vacuum heat insulation cover 3, so that the liquid nitrogen container 4, the heat conductor 6, the heat source cold head 8 and the vacuum heat insulation cover 3 have a stable connection relationship.
Three temperature sensors 5 are uniformly arranged on the outer wall of the liquid nitrogen container 4 from top to bottom, the temperature distribution in the liquid nitrogen container 4 is monitored through the temperature sensors 5, and the timely supplement of liquid nitrogen into the liquid nitrogen container 4 is determined according to the change of the temperature distribution.
According to the liquid nitrogen-based refrigeration system, under the liquid xenon temperature of 178K, the refrigeration power can be from dozens of watts to thousands of watts, the refrigeration effect is stable, the refrigeration power and temperature can be accurately adjusted within a certain range, and the temperature fluctuation control precision reaches 0.02K. Meanwhile, the refrigerating system is simple in structure, convenient to replace in a modularized mode, free of vibration parts, capable of reducing the manufacturing cost and the running cost of existing equipment and improving the stability of the equipment in long-term use.
The foregoing detailed description of the preferred embodiments of the utility model has been presented. It should be understood that numerous modifications and variations could be devised by those skilled in the art in light of the present teachings without departing from the inventive concepts. Therefore, the technical solutions available to those skilled in the art through logic analysis, reasoning and limited experiments based on the prior art according to the concept of the present invention should be within the scope of protection defined by the claims.
Claims (10)
1. A liquid nitrogen-based refrigerating system for a liquid xenon dark substance detector is characterized by comprising a liquid nitrogen container, a vacuum heat insulation cover, a heat conductor and a heat source cold head, wherein liquid nitrogen is contained in the liquid nitrogen container, the liquid nitrogen container is provided with a liquid nitrogen inlet pipe and a nitrogen outlet pipe, one end of the heat conductor penetrates through the bottom of the liquid nitrogen container to be in contact with the liquid nitrogen, and the other end of the heat conductor is connected with the heat source cold head; the liquid nitrogen container, the heat conductor and the heat source cold head are located in the vacuum heat insulation cover, and the liquid nitrogen inlet pipe and the nitrogen outlet pipe penetrate through the vacuum heat insulation cover.
2. The liquid nitrogen-based refrigeration system for a liquid xenon dark matter detector of claim 1, wherein the volume of the liquid nitrogen is half of the volume of the liquid nitrogen container.
3. The liquid nitrogen-based refrigeration system for a liquid xenon dark matter detector of claim 1, wherein the thermal conductor is oxygen-free copper.
4. The liquid nitrogen-based refrigeration system for a liquid xenon dark matter detector of claim 3, wherein the heat source cold head is oxygen-free copper.
5. The liquid nitrogen-based refrigeration system for the xenon liquid dark matter detector of claim 4, wherein a heater is disposed on said heat source coldhead.
6. The liquid nitrogen-based refrigeration system for the liquid xenon dark matter detector according to claim 1, wherein the heat conductor and the liquid nitrogen container are sealed by an indium wire.
7. The liquid nitrogen-based refrigeration system for the liquid xenon dark matter detector according to claim 1, wherein a temperature sensor is disposed on an outer wall of the liquid nitrogen container.
8. The liquid nitrogen-based refrigeration system for the xenon liquid dark matter detector of claim 7, wherein said temperature sensors are arranged in total 3 from top to bottom along the outer wall of said liquid nitrogen container.
9. The liquid nitrogen-based refrigeration system for the liquid xenon dark matter detector according to claim 1, wherein the volume of the liquid nitrogen container is 5-10L.
10. The liquid nitrogen-based refrigeration system for the liquid xenon dark matter detector according to claim 1, wherein the liquid nitrogen inlet pipe is connected to an external liquid nitrogen tank.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220482970.XU CN217031660U (en) | 2022-03-08 | 2022-03-08 | Liquid nitrogen-based refrigerating system for liquid xenon dark substance detector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220482970.XU CN217031660U (en) | 2022-03-08 | 2022-03-08 | Liquid nitrogen-based refrigerating system for liquid xenon dark substance detector |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN217031660U true CN217031660U (en) | 2022-07-22 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202220482970.XU Expired - Fee Related CN217031660U (en) | 2022-03-08 | 2022-03-08 | Liquid nitrogen-based refrigerating system for liquid xenon dark substance detector |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN217031660U (en) |
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2022
- 2022-03-08 CN CN202220482970.XU patent/CN217031660U/en not_active Expired - Fee Related
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20220722 |