CN116899637A - Low-temperature test environment pipeline system suitable for closed experiment table - Google Patents
Low-temperature test environment pipeline system suitable for closed experiment table Download PDFInfo
- Publication number
- CN116899637A CN116899637A CN202310783969.XA CN202310783969A CN116899637A CN 116899637 A CN116899637 A CN 116899637A CN 202310783969 A CN202310783969 A CN 202310783969A CN 116899637 A CN116899637 A CN 116899637A
- Authority
- CN
- China
- Prior art keywords
- air inlet
- inlet valve
- experiment table
- pipeline
- valve
- 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
Links
- 238000002474 experimental method Methods 0.000 title claims abstract description 45
- 238000012360 testing method Methods 0.000 title claims abstract description 28
- 230000009471 action Effects 0.000 claims abstract description 4
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 24
- 229910052757 nitrogen Inorganic materials 0.000 claims description 12
- 238000009413 insulation Methods 0.000 claims description 5
- 239000007788 liquid Substances 0.000 claims description 5
- 239000002184 metal Substances 0.000 claims description 5
- 238000001035 drying Methods 0.000 claims description 4
- 238000005057 refrigeration Methods 0.000 abstract description 6
- 238000002360 preparation method Methods 0.000 abstract description 5
- 239000013526 supercooled liquid Substances 0.000 abstract description 5
- 239000007789 gas Substances 0.000 description 4
- 239000000463 material Substances 0.000 description 4
- 238000000034 method Methods 0.000 description 3
- 238000004321 preservation Methods 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 2
- 239000012535 impurity Substances 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 229920001296 polysiloxane Polymers 0.000 description 2
- 238000007789 sealing Methods 0.000 description 2
- 229910000975 Carbon steel Inorganic materials 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 238000013459 approach Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000010962 carbon steel Substances 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 230000008602 contraction Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000003292 glue Substances 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 230000003014 reinforcing effect Effects 0.000 description 1
- 239000000565 sealant Substances 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 238000010257 thawing Methods 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01L—CHEMICAL OR PHYSICAL LABORATORY APPARATUS FOR GENERAL USE
- B01L1/00—Enclosures; Chambers
- B01L1/02—Air-pressure chambers; Air-locks therefor
- B01L1/025—Environmental chambers
Landscapes
- Health & Medical Sciences (AREA)
- Clinical Laboratory Science (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Testing Resistance To Weather, Investigating Materials By Mechanical Methods (AREA)
Abstract
The invention belongs to the technical field of low-temperature tests, and particularly relates to a low-temperature test environment pipeline system suitable for a closed experiment table. The invention comprises an air inlet pipeline, an exhaust pipeline, a heat exchanger, a laboratory bench and a booster fan; opening an inlet valve, an outlet valve, a lower air inlet valve and an upper air inlet valve of the experiment table during external circulation, and balancing the air pressure in the experiment table and the external air pressure under the action of a booster fan to realize internal and external air convection; and when the internal circulation is performed, the inlet valve and the outlet valve are closed, the lower air inlet valve and the upper air inlet valve of the experiment table are opened, so that the air flow is cooled in the heat exchanger, and the constant temperature is maintained in the experiment table. The pipeline device can be used for a long time and for a plurality of times in a low-temperature environment, and can realize the frost removal of the refrigeration surface and the supercooled liquid drop preparation required by the test.
Description
Technical Field
The invention belongs to the technical field of low-temperature tests, and particularly relates to a low-temperature test environment pipeline system suitable for a closed experiment table.
Background
With the continuous development of technology, people are no longer satisfied with the test under the normal temperature condition, and gradually look at the study under the adverse circumstances such as low temperature. In this case, the mechanism of icing of the liquid droplets at low temperature and the like is gradually paid attention to by researchers, wherein a low-temperature test environment control pipeline is used as an important component part of an air circulation device for ensuring that experiments of a test bench are carried out smoothly, and removal of impurities in air, including and not limited to solid small particles and the like, needs to be ensured in order to ensure normal operation in the process of carrying out the liquid droplet test in the low-temperature environment, and the existence of the impurities can damage the precision test bench. In addition, higher demands are placed on the piping system in order to maintain the test bed at low temperatures for long periods of time with little fluctuation in the temperature of the test bed. In the system, a pipeline system plays a role in providing environmental condition control of an experimental area, and plays an important role in realizing defrosting of a refrigeration surface and supercooled liquid drop preparation. Under strict environmental and test requirements, it is necessary to redesign a droplet test bed pipeline system suitable for low-temperature environments.
Disclosure of Invention
The invention aims to provide a pipeline system suitable for a low-temperature test environment of a closed experiment table, which comprehensively considers pipeline integrity, component selection and heat preservation measures and can ensure that the frost removal of a refrigeration surface and the preparation of supercooled liquid drops can be realized under the condition of the low-temperature test environment.
A low-temperature test environment pipeline system suitable for a closed experiment table comprises an air inlet pipeline, an air outlet pipeline, a heat exchanger, the experiment table and a booster fan; the air inlet pipeline is connected with an air inlet of the heat exchanger, and an inlet valve is arranged on the air inlet pipeline; the air outlet of the heat exchanger is respectively connected with a lower air inlet valve and an upper air inlet valve of the experiment table through pipelines; the air outlets at the left side and the right side of the experiment table are respectively connected with a booster fan through pipelines; the exhaust pipeline is connected with the booster fan, and an outlet valve is arranged on the exhaust pipeline;
opening an inlet valve, an outlet valve, a lower air inlet valve and an upper air inlet valve of the experiment table during external circulation, and balancing the air pressure in the experiment table and the external air pressure under the action of a booster fan to realize internal and external air convection;
and when the internal circulation is performed, the inlet valve and the outlet valve are closed, the lower air inlet valve and the upper air inlet valve of the experiment table are opened, so that the air flow is cooled in the heat exchanger, and the constant temperature is maintained in the experiment table.
Further, the heat exchanger also comprises an additional cold source; the additional cold source adopts liquid nitrogen and is provided with a nitrogen valve, and is connected to the air outlet of the heat exchanger through a pipeline; and opening a nitrogen valve to cool and dehumidify, so as to realize a low-temperature drying experimental environment.
Further, all pipelines in the pipeline system adopt metal reinforced rubber pipes, and the outer surface of the pipeline system adopts a stacked heat insulation mode for heat preservation.
The invention has the beneficial effects that:
the pipeline device can be used for a long time and for a plurality of times in a low-temperature environment, and can realize the frost removal of the refrigeration surface and the supercooled liquid drop preparation required by the test.
Drawings
Fig. 1 is a schematic diagram of the overall structure of the present invention.
FIG. 2 is a schematic diagram of two circulation modes in the present invention.
Detailed Description
The invention is further described below with reference to the accompanying drawings.
The invention provides a low-temperature test environment pipeline system suitable for a closed experiment table, which comprehensively considers pipeline integrity, component selection and heat preservation measures and can ensure that the frost removal of a refrigeration surface and the preparation of supercooled liquid drops can be realized under the condition of a low-temperature experiment environment.
The invention comprises an air inlet pipeline, an air outlet pipeline 1, a heat exchanger 3.1, a laboratory bench 4, a booster fan 5 and an additional cold source 6; the air inlet pipeline is connected with an air inlet of the heat exchanger 3.1, and an inlet valve 2.1 is arranged on the air inlet pipeline; the air outlet of the heat exchanger 3.1 is respectively connected with a lower air inlet valve 2.3 and an upper air inlet valve 2.4 of the experiment table 4 through pipelines; the air outlets at the left side and the right side of the experiment table 4 are respectively connected with a booster fan 5 through pipelines; the exhaust pipeline 1 is connected with a booster fan 5, and an outlet valve 2.5 is arranged on the exhaust pipeline;
during external circulation, an inlet valve 2.1, an outlet valve 2.5, a lower air inlet valve 2.3 and an upper air inlet valve 2.4 of the experiment table 4 are opened, and the air pressure in the experiment table 4 and the external air pressure are balanced under the action of a booster fan 5, so that internal and external air convection is realized;
during internal circulation, the inlet valve 2.1 and the outlet valve 2.5 are closed, the lower air inlet valve 2.3 and the upper air inlet valve 2.4 of the experiment table 4 are opened, so that the air flow is cooled in the heat exchanger 3.1, and the constant temperature is maintained in the experiment table.
The additional cold source 6 adopts liquid nitrogen and is provided with a nitrogen valve 2.2, and is connected to the air outlet of the heat exchanger 3.1 through a pipeline; and the nitrogen valve 2.2 is opened to cool and dehumidify, so that a low-temperature drying experimental environment is realized.
Example 1:
as shown in fig. 1, the overall structure of a pipeline system suitable for a low-temperature test environment of a closed experiment table in the invention is shown, and the pipeline system comprises: an exhaust pipeline 1, an inlet valve 2.1, a nitrogen valve 2.2, an under-experiment table inlet valve 2.3, an on-experiment table inlet valve 2.4, an outlet valve 2.5, an environment refrigerating system 3, an experiment table 4, a booster fan 5 and an additional cold source 6. The ambient refrigeration system 3 includes its internals heat exchanger 3.1 and an external machine 3.2. As shown in FIG. 2, the invention is applicable to two circulation modes of a low-temperature test environment pipeline system of a closed experiment table, wherein the left side is inner circulation, and the right side is outer circulation.
The flow of the gas stream in the pipeline can be taken from fig. 1: the gas is sucked from the outside and then enters the heat exchanger 3.1 in the environment refrigerating system 3 through the inlet valve 2.1, and is refrigerated together with the circulating gas, and then enters the experiment table 4 through the distribution of the lower air inlet valve 2.3 and the upper air inlet valve 2.4 of the experiment table, so that the environment temperature control in the experiment table 4 is realized; the gas is discharged from left and right outlets of the experiment table 4 through the booster fan 5, and internal circulation or external exhaust is determined according to the outlet valve 2.5.
The invention considers that the size of the whole pipeline system is less in determining coefficient in design, so that the whole pipeline is conveniently arranged by adopting a hose generally. In the selection of pipeline materials, the main pipeline materials are metal reinforced rubber pipes because the common PVC pipeline is sensitive to temperature. The silicone tube can keep elasticity at 40 ℃ below zero, so that the use of experiments is satisfied, and the safety of the experiments is ensured. In view of the pipe connection under low temperature, since plastic and rubber cannot be used normally at low temperature, carbon steel has low temperature brittleness, and thus high strength metal members are required for the connection to secure sealability. Adopt mode hybrid assembly of quick detach joint and quick detach clamp when being connected between silicone tube and pipeline to make the structure easily adjust and change, use connecting pieces such as three-way pipe, quick detach pagoda head, quick detach flange and ball valve in the pipeline. In view of material insulation, a stacked thermal insulation approach is used for cost and convenience.
In order to ensure the integral tightness of the pipeline, on one hand, a flat gasket is adopted on the flange connection to ensure sealing, and on the other hand, the sealing glue is smeared on the outer edge of the joint to reinforce the joint. The flat pad on the flange mainly prevents the metal flange from generating gaps due to thermal expansion and cold contraction of materials in normal temperature and low temperature environments, and the tightness of the pipeline is maintained. The sealant is mainly used for reinforcing the air tightness to a certain extent at the connecting position, and guaranteeing moisture resistance and insulation of key parts.
Because of the wide use of high strength hardware in the components, the overall system has a significant mass problem requiring additional support at critical locations. Therefore, the whole pipeline is arranged in a mode of combining the bracket and the section bar, so that the whole pipeline is constrained at a certain angle and a certain length, and experimental operation and observation are not affected. In order to enable the temperature of the test bed to be stable in the experimental process, the temperature of the test bed is controlled in the experimental process, and heat exchange is mainly convection heat exchange, so that the rotating speed of the voltage control fan is required to be regulated by an adjustable power supply, and the experimental environment is controlled to be stable.
According to the refrigerating time and humidity requirements, the temperature and humidity in the experiment table are reduced by nitrogen through the nitrogen valve 2.2, and a frostless environment is realized. According to the invention, two working paths exist according to actual conditions, one is an external circulation working mode for opening the outlet valve 2.5; the other is an internal circulation mode in which the outlet valve 2.5 is closed. The external circulation is applied in the starting and stopping stages of the equipment to balance the internal and external air pressure; and the outside is utilized to directly provide dry and cold air in cold seasons, so that the energy consumption is reduced. The internal circulation is used in the experimental stage, the air in the pipeline is continuously cooled by the internal circulation, and the air in the pipeline is continuously dried by the drying section in the experiment table, so that the experimental environment is maintained.
The above description is only of the preferred embodiments of the present invention and is not intended to limit the present invention, but various modifications and variations can be made to the present invention by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (3)
1. The utility model provides a low temperature test environment pipe-line system suitable for seal laboratory bench which characterized in that: comprises an air inlet pipeline, an air outlet pipeline (1), a heat exchanger (3.1), a laboratory bench (4) and a booster fan (5); the air inlet pipeline is connected with an air inlet of the heat exchanger (3.1), and an inlet valve (2.1) is arranged on the air inlet pipeline; the air outlet of the heat exchanger (3.1) is respectively connected with a lower air inlet valve (2.3) and an upper air inlet valve (2.4) of the experiment table (4) through pipelines; the air outlets at the left side and the right side of the experiment table (4) are respectively connected with a booster fan (5) through pipelines; the exhaust pipeline (1) is connected with the booster fan (5), and an outlet valve (2.5) is arranged on the exhaust pipeline;
when in external circulation, an inlet valve (2.1), an outlet valve (2.5), a lower air inlet valve (2.3) and an upper air inlet valve (2.4) of the experiment table (4) are opened, and the air pressure in the experiment table (4) is balanced with the external air pressure under the action of a booster fan (5), so that the internal and external air convection is realized;
and when in internal circulation, the inlet valve (2.1) and the outlet valve (2.5) are closed, the lower air inlet valve (2.3) and the upper air inlet valve (2.4) of the experiment table (4) are opened, so that the air flow is cooled in the heat exchanger (3.1), and the constant temperature is maintained in the experiment table.
2. A low temperature test environment piping system adapted for a closed laboratory bench according to claim 1, wherein: further comprises an additional cold source (6); the additional cold source (6) adopts liquid nitrogen and is provided with a nitrogen valve (2.2) and is connected to the air outlet of the heat exchanger (3.1) through a pipeline; and (3) opening a nitrogen valve (2.2) to cool and dehumidify, so as to realize a low-temperature drying experimental environment.
3. A low temperature test environment piping system adapted for a closed laboratory bench according to claim 1, wherein: all the pipelines in the pipeline system adopt metal reinforced rubber pipes, and the outer surfaces of the pipelines are insulated in a stacking heat insulation mode.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310783969.XA CN116899637A (en) | 2023-06-29 | 2023-06-29 | Low-temperature test environment pipeline system suitable for closed experiment table |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310783969.XA CN116899637A (en) | 2023-06-29 | 2023-06-29 | Low-temperature test environment pipeline system suitable for closed experiment table |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN116899637A true CN116899637A (en) | 2023-10-20 |
Family
ID=88357327
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202310783969.XA Pending CN116899637A (en) | 2023-06-29 | 2023-06-29 | Low-temperature test environment pipeline system suitable for closed experiment table |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN116899637A (en) |
-
2023
- 2023-06-29 CN CN202310783969.XA patent/CN116899637A/en active Pending
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN106642779A (en) | High-precision temperature and humidity control refrigerating system and method for laboratory | |
| JPH01285725A (en) | Air-cooled cooling device | |
| CN108717029A (en) | Low-temperature control system and control method for vacuum QCM | |
| CN110091690A (en) | LNG Cold Chain Logistics vehicle cold energy recycle system | |
| CN108132438B (en) | New energy motor high-low temperature test system | |
| CN116899637A (en) | Low-temperature test environment pipeline system suitable for closed experiment table | |
| CN201000243Y (en) | High precision cold water machine | |
| WO2019037708A1 (en) | Mobile easy-to-clean energy-saving refrigeration apparatus | |
| CN106091473B (en) | A kind of big warm area refrigerating plant of satellite normal pressure heat test | |
| CN209085137U (en) | A kind of micro-positive pressure liquid nitrogen refrigerating system applied to cold-chain box | |
| CN206670107U (en) | A kind of air conditioner outdoor system based on eddy current effect | |
| CN208269446U (en) | A kind of Auto-cascade cycle dual temperature refrigeration system of adjustable compressor delivery temperature | |
| CN115235913A (en) | Test system for simulating single-sided thermal damage of resin-based composite material | |
| EP3460374A2 (en) | Rotating heat exchanger/bypass combo | |
| US20180035568A1 (en) | Data center cooling system | |
| TWM620847U (en) | Cold water circulation system | |
| CN210511959U (en) | Explosion-proof temperature and humidity control system for shady and cool warehouse | |
| CN107088442A (en) | A kind of low energy consumption ultralow temperature experimental system and method based on time device for cooling | |
| CN205982142U (en) | Hot vacuum test case | |
| CN207689645U (en) | New energy motor high/low temperature tests system | |
| CN113368920A (en) | Large-scale high low temperature environment simulation test system of two cold sources | |
| CN112316999A (en) | High-low temperature test box | |
| CN205783951U (en) | Wide warm area air handling system | |
| CN219283501U (en) | Air treatment unit and low-temperature clean room | |
| CN220990865U (en) | Constant temperature humidification device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |