CN113390210B - Low noise and small disturbance 1K refrigeration device - Google Patents
Low noise and small disturbance 1K refrigeration device Download PDFInfo
- Publication number
- CN113390210B CN113390210B CN202110776699.0A CN202110776699A CN113390210B CN 113390210 B CN113390210 B CN 113390210B CN 202110776699 A CN202110776699 A CN 202110776699A CN 113390210 B CN113390210 B CN 113390210B
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- disturbance type
- coil
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- 238000005057 refrigeration Methods 0.000 title claims description 26
- 239000007788 liquid Substances 0.000 claims abstract description 89
- SWQJXJOGLNCZEY-UHFFFAOYSA-N helium atom Chemical compound [He] SWQJXJOGLNCZEY-UHFFFAOYSA-N 0.000 claims abstract description 31
- 229910052734 helium Inorganic materials 0.000 claims abstract description 28
- 239000001307 helium Substances 0.000 claims abstract description 28
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 3
- 229910052802 copper Inorganic materials 0.000 claims description 3
- 239000010949 copper Substances 0.000 claims description 3
- 230000000149 penetrating effect Effects 0.000 claims description 2
- 238000007789 sealing Methods 0.000 description 6
- 238000005086 pumping Methods 0.000 description 5
- 230000005855 radiation Effects 0.000 description 5
- 108010038764 cytoplasmic linker protein 170 Proteins 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 239000012530 fluid Substances 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 230000007704 transition Effects 0.000 description 2
- 230000006978 adaptation Effects 0.000 description 1
- 230000004888 barrier function Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000008707 rearrangement Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 229920006395 saturated elastomer Polymers 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- 230000000087 stabilizing effect Effects 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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
- F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
- F25D3/00—Devices using other cold materials; Devices using cold-storage bodies
- F25D3/10—Devices using other cold materials; Devices using cold-storage bodies using liquefied gases, e.g. liquid air
-
- 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
- F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
- F25D23/00—General constructional features
-
- 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
- F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
- F25D2201/00—Insulation
- F25D2201/30—Insulation with respect to sound
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Physics & Mathematics (AREA)
- Mechanical Engineering (AREA)
- Thermal Sciences (AREA)
- General Engineering & Computer Science (AREA)
Abstract
The invention discloses a low-noise micro-disturbance type 1K refrigerating device. The low noise micro-disturbance type 1K refrigerating device comprises: the bottom plate and the cover body are arranged on the bottom plate, and a containing cavity is formed between the cover body and the bottom plate; the coil pipe is arranged in the accommodating cavity, a liquid outlet of the coil pipe is positioned in the accommodating cavity, and a liquid inlet of the coil pipe is connected with external liquid helium supply equipment so that 4 He liquid enters the accommodating cavity through the coil pipe, and the liquid outlet of the coil pipe is a flat port; and the helium vapor suction pipe penetrates through the cover body and is used for sucking vapor above 4 He liquid in the accommodating cavity to the outside. According to the low-noise micro-disturbance type 1K refrigerating device, liquid helium 4 He liquid is injected into the accommodating cavity through the coil pipe, 4 He liquid is in a gentle and stable flow state in the coil pipe, the liquid outlet of the coil pipe is a flat port, 4 He liquid is sprayed out through the flat port of the coil pipe, almost no vortex disturbance exists when 4 He liquid flows out, and extra noise and interference are avoided.
Description
Technical Field
The invention relates to the technical field of refrigeration, in particular to a low-noise micro-disturbance type 1K refrigeration device.
Background
In a pre-stage refrigeration or 1K temperature zone refrigeration system in a low-temperature and ultra-low-temperature system, 4 He liquid is discharged into a closed container through a control needle valve and a discharge pipe, and vapor above the liquid 4 He in the container is pumped by utilizing saturated vapor pressure of 4 He, so that the refrigeration temperature of about 1.2-1.5K can be realized. However, 4 He liquid, when suddenly discharged into the closed container through the discharge pipe, generates many vortices, and simultaneously causes noise of the liquid and disturbance of the fluid. Such noise and disturbances can severely affect the proper operation of a 1K refrigeration unit.
Accordingly, the prior art is still in need of improvement and development.
Disclosure of Invention
The invention aims to provide a low-noise micro-disturbance type 1K refrigerating device capable of stabilizing flow and reducing noise.
To achieve the purpose, the invention adopts the following technical scheme:
A low noise micro-disturbance type 1K refrigeration apparatus comprising:
the device comprises a bottom plate and a cover body arranged on the bottom plate, wherein a containing cavity is formed between the cover body and the bottom plate;
The coil is arranged in the accommodating cavity, a liquid outlet of the coil is positioned in the accommodating cavity, and a liquid inlet of the coil is connected with external liquid helium supply equipment so that 4 He liquid enters the accommodating cavity through the coil, and the liquid outlet of the coil is a flat opening;
and the helium vapor suction tube is arranged on the cover body in a penetrating way and is used for sucking vapor above 4 He liquid in the accommodating cavity to the outside.
As an alternative mode of the low-noise micro-disturbance type 1K refrigeration device, the low-noise micro-disturbance type 1K refrigeration device further comprises a flow control needle valve, a liquid inlet end of the flow control needle valve is connected with the external liquid helium supply device, and a liquid outlet end of the flow control needle valve is connected with the coil pipe.
As an alternative to the low noise, micro-disturbance type 1K refrigeration apparatus described above, the coil is secured to the base plate by a retaining clip.
As an alternative mode of the low-noise micro-disturbance type 1K refrigerating device, a limiting groove for limiting the coil is formed in the bottom plate.
As an alternative mode of the low-noise micro-disturbance type 1K refrigerating device, the cover body comprises a top cover and a side wall, and the top cover, the side wall and the bottom plate are all made of oxygen-free copper.
As an alternative mode of the low-noise micro-disturbance type 1K refrigerating device, a nozzle is arranged at one end of the liquid outlet of the coil pipe, the liquid outlet is arranged at the tail end of the nozzle, and the length of the nozzle is more than 3 times of the diameter of the nozzle.
As an alternative to the low noise and micro-disturbance type 1K refrigeration device, the liquid outlet of the coil is elliptical, and the ratio of the major axis to the minor axis of the ellipse is 5/2.
As an alternative to the low noise, micro-disturbance type 1K refrigeration device described above, the external liquid helium supply device is a 4 He dewar.
As an alternative mode of the low-noise micro-disturbance type 1K refrigerating device, the external liquid helium supply device is a 4 He dewar, the low-noise micro-disturbance type 1K refrigerating device is arranged in the 4 He dewar, and liquid helium in the 4 He dewar enters the accommodating cavity of the low-noise micro-disturbance type 1K refrigerating device through the coil pipe.
As an alternative way of the low-noise micro-disturbance type 1K refrigerating device, an inner vacuum chamber for installing the low-noise micro-disturbance type 1K refrigerating device is arranged in the 4 He dewar, and the bottom plate is fixed on the top of the inner vacuum chamber through a mounting piece.
The invention has the advantages that: according to the low-noise micro-disturbance type 1K refrigerating device, liquid helium 4 He liquid is injected into the accommodating cavity through the coil pipe, 4 He liquid is in a gentle and stable flow state in the coil pipe, the liquid outlet of the coil pipe is a flat port, 4 He liquid is sprayed out through the flat port of the coil pipe, almost no vortex disturbance exists when 4 He liquid flows out, no extra noise or interference is generated, and the low-noise micro-disturbance type 1K refrigerating device is simple in structure, low in cost, stable in operation and good in refrigerating effect.
Drawings
FIG. 1 is a schematic side view of a low noise, slightly disturbed type 1K refrigerator according to the present invention with a portion of the side wall removed;
FIG. 2 is a schematic perspective view of a low noise, slightly disturbed 1K refrigerator according to the present invention with a portion of the side wall removed and a helium vapor suction tube;
FIG. 3 is a schematic perspective view of a low noise, slightly disturbed 1K refrigerator of the present invention with a portion of the side wall, helium vapor suction tube and top cover removed;
Fig. 4 is a schematic diagram of another embodiment of a low noise micro-disturbance type 1K refrigerating device according to the present invention.
In the figure:
100. A low noise micro-disturbance type 1K refrigerating device; 110. a bottom plate; 120. a cover body; 121. a top cover; 122. a sidewall; 130. a coiled pipe; 131. a liquid outlet; 140. a helium vapor suction tube; 150. a flow control needle valve; 151. a capillary tube; 152. a needle valve lever; 160. a joint; 170. a fixing clamp; 180. 4 He Dewar flask; 181. an inner vacuum chamber; 182. a vacuum chamber sealing flange; 183. a heat radiation baffle plate.
Detailed Description
The invention is described in further detail below with reference to the drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting thereof. It should be further noted that, for convenience of description, only some, but not all of the structures related to the present invention are shown in the drawings.
In the description of the present invention, unless explicitly stated and limited otherwise, the terms "connected," "connected," and "fixed" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communicated with the inside of two elements or the interaction relationship of the two elements. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art according to the specific circumstances.
In the present invention, unless expressly stated or limited otherwise, a first feature "above" or "below" a second feature may include both the first and second features being in direct contact, as well as the first and second features not being in direct contact but being in contact with each other through additional features therebetween. Moreover, a first feature being "above" a second feature includes the first feature being directly above and obliquely above the second feature, or simply indicating that the first feature is higher in level than the second feature.
In the description of the present embodiment, the terms "upper", "lower", and the like are based on the orientation or positional relationship shown in the drawings, and are merely for convenience of description and simplicity of operation, and do not indicate or imply that the apparatus or element in question must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the invention.
The technical scheme of the invention is further described below by the specific embodiments with reference to the accompanying drawings.
The invention provides a low-noise micro-disturbance type 1K refrigerating device, which is used for front-stage refrigeration or 1K temperature zone refrigeration systems in low-temperature and ultralow-temperature systems. Referring to fig. 1 to 3, the low noise micro-disturbance type 1K refrigerating apparatus 100 includes a base plate 110, a cover 120, a coil 130, and a helium vapor pumping tube 140, the cover 120 may include a top cover 121 and a sidewall 122, the cover 120 is disposed on the base plate 110, and a receiving chamber is formed between the cover 120 and the base plate 110, and is used for receiving 4 He liquid injected from the coil 130. The coil 130 is arranged in the accommodating cavity, the liquid outlet 131 of the coil 130 is arranged in the accommodating cavity, so that 4 He liquid in the coil 130 is injected into the accommodating cavity through the liquid outlet 131 of the coil 130, the liquid inlet of the coil 130 is connected with external liquid helium supply equipment, so that the external equipment supplies 4 He liquid to the coil 130, and 4 He liquid in the external liquid helium supply equipment enters the accommodating cavity through the coil 130. The external liquid helium supply may be, for example, 4 He dewar 180. The coil 130 is coiled several times, and liquid helium 4 He liquid is injected into the accommodating cavity through the coil 130, so that 4 He liquid can be smoothly and stably fluidized in the coil 130. Meanwhile, the liquid outlet 131 of the coil 130 is designed as a flat opening, and the flat opening can be formed by arranging a nozzle at one end of the liquid outlet of the coil 130, wherein the nozzle is in a horn shape with a small front end and a large rear end, and the tail end of the nozzle is the liquid outlet 131. The nozzle may be formed by flattening the mouth of a tube or may be formed by other forming means. The flat nozzle is designed so that 4 He liquid is ejected from the flat port with little vortex disturbance and no extra noise or interference. referring to fig. 4, since 4 He liquid is contained in the receiving cavity, the coil 130 is located below the level of 4 He liquid, and the outlet 131 of the coil 130 is designed to be flat, so that when the coil 130 sprays liquid into 4 He liquid in the receiving cavity, Without significant turbulence and noise.
As shown in fig. 1, a helium vapor pumping pipe 140 is provided through the cover 120, specifically, the helium vapor pumping pipe 140 is provided through the top cover 121, and the helium vapor pumping pipe 140 is used for pumping vapor above 4 He liquid in the accommodating chamber to the outside. The vapor above 4 He liquid in the accommodating cavity is pumped, so that the 4 He liquid in the accommodating cavity can realize a refrigeration temperature of about 1.2-1.5K, and heat can be taken away because the vapor above 4 He liquid is pumped away, so that the 4 He liquid in the accommodating cavity is cooled.
Referring to fig. 4, the low noise micro disturbance type 1K refrigerating apparatus 100 further includes a flow control needle valve 150, a liquid inlet end of the flow control needle valve 150 is connected to an external liquid helium supply device, and a liquid outlet end of the flow control needle valve 150 is connected to the coil 130. Specifically, referring to fig. 2 and 4, the top cover 121 is provided with a connector 160, the bottom end of the connector 160 is connected with the coil 130 in the accommodating cavity, the top end of the connector 160 is connected with the flow control needle valve 150, so that the flow control needle valve 150 is connected with the coil 130 through the connector 160, the connector 160 is fixed on the top cover 121, and the liquid 4 He can be conveyed into the accommodating cavity only by connecting the needle valve with the connector 160 during installation, thereby facilitating connection and installation of the integral structure.
The length of the nozzle is 3 times or more the diameter thereof, and the nozzle is generally formed by flattening the tip end of a segment of a round tube, so that the diameter referred to herein means the diameter of the round tube forming the nozzle. Setting the length of the nozzle to 3 times or more of its diameter allows for better turbulence and noise reduction because a nozzle of sufficient length allows for a smoother transition from round to flat rather than abrupt transition from round to flat, thus minimizing turbulence and noise in the fluid. Preferably, the outlet 131 of the coil 130 is oval, which is more regular than other shaped flat openings, which is convenient for processing and controlling the size and parameters. The ratio of the major axis to the minor axis of the ellipse is 5/2.
Referring to fig. 3, in order to make the coil 130 more firmly installed, the coil 130 may be fixed to the base plate 110 by a fixing clip 170, the fixing clip 170 is pressed against the coil 130, and the fixing clip 170 is fixed to the base plate 110 by a screw. Preferably, the coil 130, the bottom plate 110, the side walls 122, the top cover 121 and the fixing clips 170 are all made of oxygen-free copper, and the screws are made of stainless steel. By fixing the coil 130 to the base plate 110 by the fixing clip 170, vibration of the coil 130 itself can be reduced, and operational stability of the whole device can be improved.
In addition, can also be provided with spacing recess on bottom plate 110, the shape and the size of spacing recess and coil pipe 130 adaptation, when installing coil pipe 130, place coil pipe 130 in the spacing recess on bottom plate 110, make coil pipe 130 spacing and fixed, further promote coil pipe 130's fixed effect, simultaneously, can reduce coil pipe 130 self vibration, promote the stability of whole device operation.
As shown in fig. 4, the external liquid helium supply device adopts 4 He dewar 180, the low-noise micro-disturbance type 1K refrigerating device 100 is arranged in the 4 He dewar 180, and liquid helium in the 4 He dewar 180 enters the accommodating cavity of the low-noise micro-disturbance type 1K refrigerating device 100 through the coil 130. Specifically, as shown in fig. 4, an inner vacuum chamber 181 for mounting the low noise micro-disturbance type 1K refrigeration device 100 is provided in the 4 He dewar 180, a vacuum chamber sealing flange 182 is provided at the top of the inner vacuum chamber 181, and the vacuum chamber sealing flange 182 seals the inner vacuum chamber 181 so as to arrange the low noise micro-disturbance type 1K refrigeration device 100 in the inner vacuum chamber 181. When the system is in operation, 4 He liquid in 4 He Dewar 180 is pumped into the low-noise micro-disturbance type 1K refrigerating device 100. The bottom plate 110 of the low noise micro-disturbance type 1K refrigerating device 100 is fixed to the vacuum chamber sealing flange 182 at the top of the inner vacuum chamber 181 by a mounting member, which may be, for example, a mounting bracket or a mounting rod, etc., so as to suspend the low noise micro-disturbance type 1K refrigerating device 100 in the inner vacuum chamber 181.
As shown in fig. 4, a flow control needle 150 is located in the inner vacuum chamber 181, the flow control needle 150 is connected 4 to 4 He liquid in the He dewar 180 through a capillary tube 151, and 4 He liquid in the 4 He dewar 180 is introduced into the low noise micro-disturbance type 1K refrigerating apparatus 100. The needle control lever 152 of the flow control needle 150 passes through the vacuum chamber sealing flange 182 and out to the top of the 4 He dewar 180 to facilitate adjusting the needle control lever 152 of the flow control needle 150 from outside the 4 He dewar 180 to control flow. The helium vapor suction tube 140 passes through the vacuum chamber sealing flange 182 and out to the top of 4 He dewar 180 to pump vapor above 4 He liquid in the low noise, micro-disturbance type 1K refrigeration unit 100 out of the 4 He dewar 180.
Preferably, as shown in fig. 4, a heat radiation baffle 183 for isolating heat radiation is arranged at the top of the 4 He dewar 180, and the heat radiation baffle 183 can isolate heat outside the 4 He dewar 180, so as to improve the refrigerating effect of the low-noise micro-disturbance type 1K refrigerating device 100. The heat radiation barrier 183 may be provided with a plurality of pieces as required.
It is to be understood that the above examples of the present invention are provided for clarity of illustration only and are not limiting of the embodiments of the present invention. Various obvious changes, rearrangements and substitutions can be made by those skilled in the art without departing from the scope of the invention. It is not necessary here nor is it exhaustive of all embodiments. Any modification, equivalent replacement, improvement, etc. which come within the spirit and principles of the invention are desired to be protected by the following claims.
Claims (8)
1. A low noise, micro-disturbance type 1K refrigeration apparatus comprising:
the device comprises a bottom plate (110) and a cover body (120) arranged on the bottom plate (110), wherein a containing cavity is formed between the cover body (120) and the bottom plate (110);
the coil pipe (130), the coil pipe (130) is arranged in the accommodating cavity, a liquid outlet (131) of the coil pipe (130) is positioned in the accommodating cavity, a liquid inlet of the coil pipe (130) is connected with external liquid helium supply equipment, so that 4 He liquid enters the accommodating cavity through the coil pipe (130), and the liquid outlet (131) of the coil pipe (130) is a flat opening;
A helium vapor suction tube (140) penetrating the cover body (120) and used for sucking vapor above 4 He liquid in the accommodating cavity to the outside;
The liquid inlet end of the flow control needle valve (150) is connected with the external liquid helium supply device, and the liquid outlet end of the flow control needle valve (150) is connected with the coil pipe (130);
the coil (130) is secured to the base plate (110) by a retaining clip (170).
2. The low noise and micro-disturbance type 1K refrigeration apparatus according to claim 1, wherein a limit groove for limiting the coil (130) is provided on the bottom plate (110).
3. The low-noise micro-disturbance type 1K refrigeration apparatus according to claim 1, wherein the cover (120) includes a top cover (121) and a side wall (122), and the top cover (121), the side wall (122) and the bottom plate (110) are all made of oxygen-free copper.
4. The low noise and fine disturbance type 1K refrigerating apparatus according to claim 1, wherein a nozzle is provided at one end of the liquid discharged from the coil pipe (130), the liquid discharge port (131) is provided at the end of the nozzle, and the length of the nozzle is 3 times or more the diameter thereof.
5. The low noise and fine disturbance type 1K refrigerating apparatus according to claim 1, wherein the liquid outlet (131) of the coil (130) is an ellipse, and a ratio of a major axis to a minor axis of the ellipse is 5/2.
6. The low noise, micro-disturbance type 1K refrigeration apparatus according to claim 1, wherein the external liquid helium supply device is a 4 He dewar (180).
7. The low noise, micro-disturbance type 1K refrigeration device according to claim 1, wherein the external liquid helium supply device is a 4 He dewar (180), the low noise, micro-disturbance type 1K refrigeration device is provided within the 4 He dewar (180), and liquid helium within the 4 He dewar (180) enters the housing cavity of the low noise, micro-disturbance type 1K refrigeration device through the coil (130).
8. The low noise micro-disturbance type 1K refrigerating device according to claim 7, wherein an inner vacuum chamber (181) for mounting the low noise micro-disturbance type 1K refrigerating device is provided in the 4 He dewar (180), and the bottom plate (110) is fixed to a top of the inner vacuum chamber (181) by a mounting member.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110776699.0A CN113390210B (en) | 2021-07-09 | 2021-07-09 | Low noise and small disturbance 1K refrigeration device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110776699.0A CN113390210B (en) | 2021-07-09 | 2021-07-09 | Low noise and small disturbance 1K refrigeration device |
Publications (2)
| Publication Number | Publication Date |
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| CN113390210A CN113390210A (en) | 2021-09-14 |
| CN113390210B true CN113390210B (en) | 2024-11-22 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202110776699.0A Active CN113390210B (en) | 2021-07-09 | 2021-07-09 | Low noise and small disturbance 1K refrigeration device |
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Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN215176267U (en) * | 2021-07-09 | 2021-12-14 | 深圳市福田区南科大量子技术与工程研究院 | Low-noise micro-disturbance type 1K refrigerating device |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| NL6705713A (en) * | 1967-04-22 | 1968-10-23 | ||
| CN2788100Y (en) * | 2005-03-24 | 2006-06-14 | 中国科学院理化技术研究所 | Superfluid helium pressurizing device |
| CN101498538B (en) * | 2009-02-09 | 2011-06-15 | 中国科学技术大学 | Double-coil pipe cold steam refrigerating low-loss liquid helium Dewar |
| CN202119187U (en) * | 2011-06-08 | 2012-01-18 | 博西华家用电器有限公司 | Drainage nozzle and drainage device for refrigerator, and refrigerator |
| US20140202174A1 (en) * | 2013-01-24 | 2014-07-24 | Cryomech, Inc. | Closed Cycle 1 K Refrigeration System |
| CN112693275A (en) * | 2020-12-19 | 2021-04-23 | 常州大学 | Synchronous multi-circulation composite system for assisting cooling and heating automobile air conditioner |
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- 2021-07-09 CN CN202110776699.0A patent/CN113390210B/en active Active
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN215176267U (en) * | 2021-07-09 | 2021-12-14 | 深圳市福田区南科大量子技术与工程研究院 | Low-noise micro-disturbance type 1K refrigerating device |
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