CN111043806B - Gas refrigeration scheme absorption bottle sampling refrigeration and low-temperature storage composite device and method - Google Patents
Gas refrigeration scheme absorption bottle sampling refrigeration and low-temperature storage composite device and method Download PDFInfo
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- CN111043806B CN111043806B CN201911169605.2A CN201911169605A CN111043806B CN 111043806 B CN111043806 B CN 111043806B CN 201911169605 A CN201911169605 A CN 201911169605A CN 111043806 B CN111043806 B CN 111043806B
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- 238000005070 sampling Methods 0.000 title claims abstract description 87
- 238000010521 absorption reaction Methods 0.000 title claims abstract description 65
- 238000005057 refrigeration Methods 0.000 title claims abstract description 60
- 238000000034 method Methods 0.000 title claims abstract description 37
- 239000002131 composite material Substances 0.000 title claims abstract description 17
- 239000003507 refrigerant Substances 0.000 claims abstract description 20
- 239000007788 liquid Substances 0.000 claims abstract description 11
- 239000000126 substance Substances 0.000 claims abstract description 10
- 238000012545 processing Methods 0.000 claims description 27
- 230000005540 biological transmission Effects 0.000 claims description 16
- 238000007789 sealing Methods 0.000 claims description 5
- 238000013459 approach Methods 0.000 claims description 3
- 238000009413 insulation Methods 0.000 claims description 3
- 239000012774 insulation material Substances 0.000 claims description 3
- 150000001875 compounds Chemical class 0.000 claims 1
- 238000001816 cooling Methods 0.000 claims 1
- 238000005265 energy consumption Methods 0.000 abstract description 7
- 239000003570 air Substances 0.000 description 128
- 239000007789 gas Substances 0.000 description 41
- MWUXSHHQAYIFBG-UHFFFAOYSA-N nitrogen oxide Inorganic materials O=[N] MWUXSHHQAYIFBG-UHFFFAOYSA-N 0.000 description 6
- 238000010586 diagram Methods 0.000 description 4
- 239000012080 ambient air Substances 0.000 description 3
- 239000003344 environmental pollutant Substances 0.000 description 3
- 231100000719 pollutant Toxicity 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000006467 substitution reaction Methods 0.000 description 2
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical class [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 1
- 239000002250 absorbent Substances 0.000 description 1
- 230000002745 absorbent Effects 0.000 description 1
- 239000003463 adsorbent Substances 0.000 description 1
- 229910002090 carbon oxide Inorganic materials 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 230000005494 condensation Effects 0.000 description 1
- 238000009833 condensation Methods 0.000 description 1
- 239000000356 contaminant Substances 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 239000012528 membrane Substances 0.000 description 1
- 238000004321 preservation Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000002912 waste gas Substances 0.000 description 1
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- 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
- F25D11/00—Self-contained movable devices, e.g. domestic refrigerators
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B1/00—Compression machines, plants or systems with non-reversible cycle
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- 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
- F25D17/00—Arrangements for circulating cooling fluids; Arrangements for circulating gas, e.g. air, within refrigerated spaces
- F25D17/04—Arrangements for circulating cooling fluids; Arrangements for circulating gas, e.g. air, within refrigerated spaces for circulating air, e.g. by convection
- F25D17/06—Arrangements for circulating cooling fluids; Arrangements for circulating gas, e.g. air, within refrigerated spaces for circulating air, e.g. by convection by forced circulation
- F25D17/08—Arrangements for circulating cooling fluids; Arrangements for circulating gas, e.g. air, within refrigerated spaces for circulating air, e.g. by convection by forced circulation using ducts
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- 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
- F25D19/00—Arrangement or mounting of refrigeration units with respect to devices or objects to be refrigerated, e.g. infrared detectors
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- 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
- F25D23/02—Doors; Covers
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- 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
- F25D23/06—Walls
- F25D23/065—Details
- F25D23/066—Liners
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- 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
- F25D29/00—Arrangement or mounting of control or safety devices
- F25D29/005—Mounting of control devices
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N1/00—Sampling; Preparing specimens for investigation
- G01N1/02—Devices for withdrawing samples
- G01N1/22—Devices for withdrawing samples in the gaseous state
- G01N1/2273—Atmospheric sampling
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N1/00—Sampling; Preparing specimens for investigation
- G01N1/28—Preparing specimens for investigation including physical details of (bio-)chemical methods covered elsewhere, e.g. G01N33/50, C12Q
- G01N1/42—Low-temperature sample treatment, e.g. cryofixation
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N1/00—Sampling; Preparing specimens for investigation
- G01N1/02—Devices for withdrawing samples
- G01N1/22—Devices for withdrawing samples in the gaseous state
- G01N2001/2282—Devices for withdrawing samples in the gaseous state with cooling means
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Abstract
The invention discloses a sampling refrigeration and low-temperature storage composite device of an absorption bottle in a gaseous refrigeration scheme, which comprises: the storage bin module is used for storing the absorption bottles; the refrigeration mechanism comprises a compressor, a condenser and an evaporator, wherein the compressor compresses a gaseous refrigerant into a high-temperature high-pressure gaseous refrigerant, the high-temperature high-pressure gaseous refrigerant is condensed in the condenser to release heat and be liquefied into a low-temperature high-pressure liquid refrigerant, and the low-temperature high-pressure liquid refrigerant is evaporated, gasified and absorbs heat in the evaporator; the evaporator and the storage bin module exchange heat by taking gaseous substances as media. The invention is a composite device for sampling, refrigerating and low-temperature storage of the absorption bottle in the gaseous refrigeration scheme, which is convenient to operate, improves the refrigeration efficiency, reduces the load and reduces the energy consumption. In addition, the invention also discloses a method for sampling and storing the atmospheric sample in the gaseous refrigeration scheme.
Description
Technical Field
The invention relates to the technical field of environmental atmosphere sampling, in particular to a composite device and a method for sampling, refrigeration and low-temperature storage of an absorption bottle in a gaseous refrigeration scheme, which are convenient to operate, improve the refrigeration efficiency, reduce the load and reduce the energy consumption.
Background
Atmospheric sampling refers to a method for collecting samples of pollutants or polluted air in the atmosphere, and the collection method is a method for gathering pollutants with lower concentration in the atmosphere by allowing a large amount of air to pass through a liquid absorbent or a solid adsorbent, such as an air suction method and a filter membrane method. Another type is to collect the air containing the contaminants with containers (glass bottles, plastic bags, etc.).
When the concentration of the measured component in the atmosphere is low, a concentration sampling method is adopted, wherein the concentration sampling method comprises a solution absorption method, a small packed column sampling method, a low-temperature condensation method and a filter material sampling method, and the average concentration of the pollutants in the atmosphere in the sampling time is measured by the method. According to the purpose and the field condition of sampling, the atmosphere sampling selects a proper sampling mode to ensure that the collected sample is representative.
Solution absorption is a sampling method that is often used. When the solution absorption method is adopted, according to the on-site sampling requirement of ambient air and waste gas, substances such as nitrogen oxides and carbon oxides are often sampled in the sampling process, for example, nitrogen oxides are sampled, and the sampling process has certain technical requirement on temperature, namely the temperature of absorption liquid is required to be 20 +/-4 ℃. The storage time requirement for the sample is that the sample needs to be stored at low temperature, in the dark: 1. when the storage temperature is 30 ℃, the storage can be stably carried out for 8 hours; 2. when the storage temperature is 20 ℃, the storage can be stably carried out for 24 hours; 3. can be stably stored for at least 3 days when being refrigerated at 0-4 ℃.
Because the air sample collected by the on-site sampling personnel is taken from the sampling site to the laboratory, and the work of the laboratory staff is generally arranged to be full, the sample can be inspected and analyzed within 24 hours, and if the work is overtime, the problems of sample failure and inaccurate inspection and analysis data are caused. Therefore, in order to ensure that the requirements of on-site sampling are met, the sample needs to be refrigerated at 0-4 ℃, so that laboratory workers have sufficient time to analyze and inspect the sample.
In the prior art, the conventional method is as follows: during on-site sampling, the temperature of the absorption liquid is kept at 20 +/-4 ℃ in a Peltier refrigeration mode, and when sampling is completed, the absorption bottle is transferred to a vehicle-mounted refrigerator and is subjected to cold storage through the vehicle-mounted refrigerator. However, the refrigeration mode of the vehicle-mounted refrigerator is still refrigeration through the Peltier, the efficiency of the Peltier refrigeration is low, and the temperature is difficult to keep in a temperature range of 0-4 ℃. Therefore, the samples are refrigerated whether the samples are sampled on site or after the sampling is finished, and the required temperature condition is maintained through Peltier refrigeration, which cannot guarantee that the sampled samples meet the technical requirements. But also has the following disadvantages: firstly, the refrigerating power of the Peltier refrigeration is very low, the refrigerating efficiency is very low, the energy consumption is very high, most ambient air sampling places are in the field, a mobile power supply is required to be carried to a sampling site for supplying power, the mobile power supply has extremely high requirements, the load of sampling personnel on the aspect of sampling equipment is increased, and in addition, higher sampling cost is brought; secondly, the vehicle-mounted refrigerator is not a professional environment sampling device, and the materials used by the vehicle-mounted refrigerator can not be guaranteed to meet the storage requirement of an atmospheric sample; thirdly, the prior art can not satisfy the requirement of providing cold storage in sampling and transportation processes through a refrigeration storage device.
Therefore, there is a need for a composite device for sampling, refrigeration and low-temperature storage of absorption bottles with a gas refrigeration scheme, which is convenient to operate, improves refrigeration efficiency, reduces load and reduces energy consumption
Disclosure of Invention
The invention aims to provide a composite device and a method for sampling, refrigeration and low-temperature storage of an absorption bottle in a gaseous refrigeration scheme, which are convenient to operate, improve the refrigeration efficiency, reduce the load and reduce the energy consumption.
In order to achieve the purpose, the technical scheme provided by the invention is as follows: the utility model provides a gaseous refrigeration scheme absorption bottle sampling refrigeration and cryogenic storage set composite, includes:
the storage bin module is used for storing the absorption bottles;
the refrigeration mechanism comprises a compressor, a condenser and an evaporator, wherein the compressor compresses a gaseous refrigerant into a high-temperature high-pressure gaseous refrigerant, the high-temperature high-pressure gaseous refrigerant is condensed in the condenser to release heat and be liquefied into a low-temperature high-pressure liquid refrigerant, and the low-temperature high-pressure liquid refrigerant is evaporated, gasified and absorbs heat in the evaporator;
the evaporator and the storage bin module exchange heat by taking gaseous substances as media.
The gaseous substance is air.
The storage bin module includes first storage bin, the evaporimeter is located in the first storage bin, first storage bin includes: the first bin door is arranged on the first bin body, the first bin door and the first bin body are matched to form a sealed heat-insulation space for the first storage bin, and the first bin body and the first bin door are both of heat-insulation material structures.
The storage bin module further comprises a second storage bin, the second storage bin is communicated with the first storage bin, an opening is formed in the upper end of the second storage bin, and the absorption bottle is placed into the second storage bin from the opening in a sealing mode.
The second storage bin is communicated with the first storage bin and comprises a first air conveying pipe and a second air conveying pipe, and the first air conveying pipe and the second air conveying pipe are used for circulating air in the first storage bin and the second storage bin to refrigerate the second storage bin.
The first storage bin and the second storage bin are respectively provided with a gas transmission port and a gas return port, the gas transmission port of the first storage bin is connected with the gas return port of the second storage bin through the first gas transmission pipe, and the gas transmission port of the second storage bin is connected with the gas return port of the first storage bin through the second gas transmission pipe.
Be equipped with a first air pump that is used for providing the air conveying power on the first gas-supply pipe, first storage storehouse is equipped with first temperature sensor, second storage storehouse is equipped with second temperature sensor, still includes a central processing unit, first temperature sensor, second temperature sensor and first air pump all with central processing unit connects, central processing unit basis the information of the temperature that first temperature sensor and second temperature sensor detected is in order to control the power size of first air pump, central processing unit still controls the operating power of compressor.
Be equipped with a first air pump that is used for providing the air conveying power on the first gas-supply pipe, be equipped with a second air pump that is used for providing return-air power on the second gas-supply pipe, the model of first air pump and second air pump is the same, first storage storehouse is equipped with first temperature sensor, second storage storehouse is equipped with second temperature sensor, still includes a central processing unit, first temperature sensor, second temperature sensor, first air pump and second air pump all with central processing unit connects, central processing unit basis the information of the temperature that first temperature sensor and second temperature sensor detected is in order to control the power size of first air pump and second air pump, central processing unit still controls the operating power of compressor.
The air inlet of the first air pump is provided with a first flow sensor, the air inlet of the second air pump is provided with a second flow sensor, and the central processing unit adjusts the power of the first air pump and the power of the second air pump according to the information of the air flow detected by the first flow sensor and the second flow sensor.
And a first air pressure sensor and a second air pressure sensor are respectively arranged in the first storage bin and the second storage bin.
The first storage bin is provided with a gas transmission port and a gas return port, and the gas transmission port and the gas return port of the first storage bin are respectively provided with a gas valve; the second storage bin is also provided with an air conveying port and an air return port, and the air conveying port and the air return port of the second storage bin are also respectively provided with an air valve.
In order to achieve the above object, the present invention further provides the following technical solutions: provided is a gaseous refrigeration scheme atmospheric sample sampling and cryogenic storage method, comprising:
1. a sampling step:
1.1, placing an absorption bottle for sampling in the second storage bin, communicating the first storage bin with the second storage bin through the first air pipe and the second air pipe, starting the refrigeration mechanism, refrigerating the first storage bin by the refrigeration mechanism, circulating gas in the first storage bin and the second storage bin to refrigerate the second storage bin, and controlling the temperature of the second storage bin to be stabilized in a preset temperature range;
1.2, starting the solution absorption method atmospheric sampling equipment to sample and finish sampling;
2. and (3) low-temperature storage:
2.1, controlling the temperature of the first storage bin to be stabilized in a preset temperature range when sampling approaches to the tail sound;
And 2.2, after sampling is finished, moving the absorption bottle into the first storage bin, and storing at a low temperature within a preset temperature range.
Compared with the prior art, in the composite device for sampling and refrigerating and low-temperature storage of the absorption bottle in the gaseous refrigeration scheme, the refrigerating mechanism is a compressor for refrigerating, and the evaporator and the storage bin module exchange heat by taking gaseous substances as media. Therefore, the technical scheme of the invention is that the refrigerating efficiency of the compressor is very high, the sample can be ensured to be stored in a preset temperature value range in the storage process, and the portable power source can be reduced due to the high refrigerating efficiency, so that the load of a sampling device carried by a sampler in the sampling process can be reduced.
The invention will become more apparent from the following description when taken in conjunction with the accompanying drawings, which illustrate embodiments of the invention.
Drawings
Fig. 1 is a schematic block diagram of the composite device for sampling refrigeration and low-temperature storage of absorption bottles in the gaseous refrigeration scheme.
Fig. 2 is a schematic structural diagram of an embodiment of the composite device for sampling refrigeration and cryogenic storage of absorption bottles in the gaseous refrigeration scheme of the invention.
Fig. 3 is a schematic block diagram of the circuit of an embodiment of the composite apparatus for sampling refrigeration and cryogenic storage of absorption bottles in the gaseous refrigeration scheme of the present invention.
Fig. 4 is another schematic block diagram of the circuit of the composite device for sampling refrigeration and low-temperature storage of absorption bottles in the gaseous refrigeration scheme of the invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, not all, embodiments of the present invention. All other embodiments, which can be obtained by a person skilled in the art without any inventive step based on the embodiments of the present invention, shall fall within the scope of protection of the present invention.
Referring to fig. 1 and 2, the present invention provides a composite device 100 for sampling, refrigeration and cryogenic storage of absorption bottles in a gaseous refrigeration scheme, comprising:
the storage bin module 1 is used for storing the absorption bottles 3, and the storage bin module 1 is used for storing the absorption bottles 3;
in all embodiments of the present invention, the storage module 1 is ideally a thermal storage structure for storing the absorption bottle 3, which is hermetically sealed. In particular to all embodiments of the present invention, the storage module 1 is mainly used for low-temperature storage of absorption bottles during and after sampling, both during and after sampling and storage, under low-temperature technical conditions.
The refrigeration mechanism 2 comprises a compressor 21, a condenser 22 and an evaporator 23, wherein the compressor 21 compresses a gaseous refrigerant into a high-temperature high-pressure gaseous refrigerant, the high-temperature high-pressure gaseous refrigerant is condensed in the condenser 22 to release heat and be liquefied into a low-temperature high-pressure liquid refrigerant, and the low-temperature high-pressure liquid refrigerant is evaporated, gasified and absorbs heat in the evaporator 23, namely, a space where the evaporator 23 is located is refrigerated;
the evaporator 23 and the storage bin module 1 exchange heat by taking gaseous substances as media. In the present invention, "heat exchange" mainly means that an object with a lower temperature refrigerates an object with a higher temperature, for example, the evaporator 23 exchanges heat with the storage bin module 1 by using a gaseous substance as a medium, and means that the evaporator 23 refrigerates the storage bin module 1.
In the above embodiment, the storage bin module 1 includes at least two storage bins, one of the storage bins is a storage bin used for storing the absorption bottles 3 in the sampling process, and the technical requirement for the temperature in the storage bin used in the sampling process is 20 ± 4 ℃; the other storage bin is used for storing the absorption bottle 3 in the low-temperature storage process after sampling is finished, and the technical requirement on the temperature in the storage bin used in the low-temperature storage process is 0-4 ℃.
In one embodiment, the gaseous substance is air. Since air is the most readily available heat exchange medium, the evaporator 23 is located in a specific space containing air, and the evaporator 23 absorbs heat in the specific space, that is, cools the specific space, in this embodiment, the specific space may be directly the storage bin module 1, or a space capable of being cooled by air circulation with the storage bin module 1.
In one embodiment, referring to fig. 1 and 2, the storage module 1 includes a first storage 11, the evaporator 23 is disposed in the first storage 11, and the first storage 11 includes: the first bin body 111 and the first bin gate (not shown in the figure), the first bin gate is arranged on the first bin body 111, the first bin gate and the first bin body 111 are matched to form a sealed heat-insulation space for the first storage bin 11, and the first bin body 11 and the first bin gate are both in a heat-insulation material structure.
In the above embodiment, referring to fig. 1 and 2, the storage module 1 further includes a second storage 12, the second storage 12 is communicated with the first storage 11, an opening 121 is disposed at an upper end of the second storage 12, and when the absorption bottle 3 is placed into the second storage 12 from the opening 121, the absorption bottle 3 can be placed in the second storage 12 in a sealing manner. In fact, it is difficult to make the absorption bottle 3 completely airtight, and it is only possible to reduce the heat exchange between the second storage container 12 and the ambient air as much as possible.
In the above embodiment, the storage bin module 1 includes the first storage bin 11 and the second storage bin 12, and the evaporator 23 is disposed in the first storage bin 11, so that the storage bin 11 can easily meet the technical requirement of lower temperature, and theoretically, the minimum temperature in the first storage bin 11 can be controlled to-20 ℃ (the technical requirement of 0-4 ℃ can be completely met) in a compressor refrigeration manner. Therefore, the first storage bin 11 is used for storing the absorption bottle 3 after sampling is completed, and the technical requirement on the temperature is 0-4 ℃; the second storage bin 12 is communicated with the first storage bin 11, the second storage bin 12 and the first storage bin 11 are circularly refrigerated by means of circulating air, the second storage bin 12 is limited by the technical conditions of circular refrigeration and existing heat preservation, and therefore the technical requirement of very low temperature (such as the temperature range of 0-4 ℃) is difficult to achieve, therefore, the second storage bin 12 is suitable for being applied to the sampling process and used for storing the absorption bottle 3 under the condition that the technical requirement of temperature is 20 +/-4 ℃, and it needs to be noted that when the absorption bottle 3 is stored in the second storage bin 12, most of the volume of the absorption bottle 3 is placed in the second storage bin 12, a small part of the upper end of the absorption bottle is exposed, and the air inlet and the air outlet of the absorption bottle 3 are exposed above the second storage bin 12. In the present invention, the opening 121 of the second storage bin 12 is configured to be circular, so that the shape of the absorption bottle 3 which is suitable for configuration is a cylindrical absorption bottle, and when the absorption bottle 3 which is cylindrical in shape is placed in the second storage bin 12, the absorption bottle 3 is in sealing fit with the circular opening 121, thereby achieving the technical requirement of air sealing as much as possible.
In one embodiment, the second storage container 12 is in communication with the first storage container 11 and includes a first air pipe 4 and a second air pipe 5, and the first air pipe 4 and the second air pipe 5 are used for circulating air in the first storage container 11 and the second storage container 12 to cool the second storage container 12. In this embodiment, because the evaporator 23 is disposed in the first storage bin 11, the evaporator 23 meets the technical requirement of low temperature for the first storage bin 11, and when the air in the first storage bin 11 and the air in the second storage bin 12 circulate through the first air pipe 4 and the second air pipe 5, the first storage bin 11 and the second storage bin 12 exchange heat to reduce the temperature in the second storage bin 12. The temperature in the second storage bin 12 will depend mainly on the following 3 factors:
1. the temperature of the external environment is high or low;
2. the temperature value in the first storage 11;
3. the flow rate of the gas circulated by the first gas pipe 4 and the second gas pipe 5 per unit time is large or small.
In one embodiment, referring to fig. 2, both the first storage bin 11 and the second storage bin 12 are respectively provided with a gas transmission port and a gas return port, that is, the first storage bin 11 is provided with a gas transmission port 11a and a gas return port 11b, the second storage bin 12 is provided with a gas transmission port 12a and a gas return port 12b, the gas transmission port 11a of the first storage bin 11 is connected with the gas return port 12b of the second storage bin 12 through the first gas pipe 4, and the gas transmission port 12a of the second storage bin 12 is connected with the gas return port 11b of the first storage bin 11 through the second gas pipe 5.
In one embodiment, referring to fig. 2 and 3, the first air pipe 4 is provided with a first air pump 6 for providing air power, the first storage bin 11 is provided with a first temperature sensor 7, the second storage bin 12 is provided with a second temperature sensor 8, and the air compressor further comprises a central processing unit 9 (refer to fig. 3), the first temperature sensor 7, the second temperature sensor 8 and the first air pump 6 are all connected with the central processing unit 9, the central processing unit 9 controls the power of the first air pump 6 according to the temperature information detected by the first temperature sensor 7 and the second temperature sensor 8, and the central processing unit 9 further controls the working power of the compressor 21. In this embodiment, the first temperature sensor 7 and the second temperature sensor 8 are respectively configured to detect temperature information of the first storage bin 11 and the second storage bin 12, so as to ensure that the temperatures in the first storage bin 11 and the second storage bin 12 meet the technical requirements of sampling or storing samples.
In one embodiment, referring to fig. 4, in order to better maintain the air pressure balance between the second storage chamber 12 and the outside atmosphere, the heat exchange between the second storage chamber 12 and the outside is reduced as much as possible, and the embodiment is extended: be equipped with a first air pump 6 that is used for providing air conveying power on the first air-conveying pipe 4, be equipped with a second air pump 10 that is used for providing return-air power on the second air-conveying pipe 5, the model of first air pump 6 and second air pump 10 is the same, first storage storehouse 11 is equipped with first temperature sensor 7, second storage storehouse 12 is equipped with second temperature sensor 8, still includes a central processing unit 9, first temperature sensor 7, second temperature sensor 8, first air pump 6 and second air pump 10 all with central processing unit 9 connects, central processing unit 9 basis the information of the temperature that first temperature sensor 7 and second temperature sensor 8 detected is in order to control the power size of first air pump 6 and second air pump 10, central processing unit 9 still controls the operating power of compressor 21.
When the absorption bottle 3 is placed in the second storage bin 12, although the air tightness of the second storage bin 12 is maintained as much as possible, the air tightness is often difficult to maintain in consideration of the fact that the absorption bottle 3 and the second storage bin 12 are often inserted and pulled out, if only one first air pump 6 is provided, when the first air pump 6 pumps air to the second storage bin 12, the air pressure balance between the second storage bin 12 and the atmospheric pressure may be broken, so that the low-temperature air in the second storage bin 12 overflows, the heat exchange between the second storage bin 12 and the outside is increased, and the overall energy consumption is increased. Therefore, the second air pump 10 is introduced, the first air pump 6 and the second air pump 10 work simultaneously, the relative balance between the second storage bin 12 and the external atmospheric pressure is kept, the heat exchange between the second storage bin 12 and the outside is reduced as much as possible, and the total energy consumption is reduced.
The reason for providing two air pumps is also based on the consideration that the internal volumes of the first storage bin 11 and the second storage bin 12 are different, particularly the internal volume of the first storage bin 11 may be much larger than the internal volume of the second storage bin 12, when only the first air pump 6 pumps air in the first storage bin 11 to the second storage bin 12, the most fundamental reason for generating air flows in two communicated spaces is due to the imbalance of air pressures of the two spaces, because when the first air pump 6 pumps air in the second storage bin 12, the air flow returning from the second air pipe 5 to the first air pump 11 has a hysteresis, and a momentary high pressure is generated in the second storage bin 12, thereby possibly destroying the air tightness effect in the second storage bin 12, and two air pumps are provided to work simultaneously, eliminating the hysteresis of the air flow can keep the air-tight effect of the second storage chamber 12 from being damaged, and can greatly increase the accuracy of the temperature control of the first storage chamber 11 and the second storage chamber 12.
Referring to the embodiment shown in fig. 4, a first flow sensor 13 is disposed at an air inlet of the first air pump 6, a second flow sensor 14 is disposed at an air inlet of the second air pump 10, and the cpu 9 adjusts power of the first air pump 6 and the second air pump 10 according to information of air flow detected by the first flow sensor 13 and the second flow sensor 14. By providing a flow sensor, it can be ensured that the flow rate of the gas flowing from the first storage container 11 to the second storage container 12 per unit time is the same as the flow rate of the gas flowing back from the second storage container 12 to the first storage container 11.
Referring to fig. 2, a first air pressure sensor 15 and a second air pressure sensor 16 are respectively disposed in the first storage bin 11 and the second storage bin 12. The first air pressure sensor 15 and the second air pressure sensor 16 can detect the air pressure in the first storage bin 11 and the second storage bin 12, and can grasp whether the air tightness of the first storage bin 11 and the second storage bin 12 meets the requirement at any time, so as to keep the air pressure in the first storage bin 11 and the second storage bin 12 stable.
In one embodiment, referring to fig. 2, the first storage bin 11 is provided with a gas transmission opening 11a and a gas return opening 11b, and the gas transmission opening 11a and the gas return opening 11b of the first storage bin 11 are respectively provided with a gas valve 17a and a gas valve 17 b; the second storage bin 12 is also provided with an air delivery opening 12a and an air return opening 12b, and the air delivery opening 12a and the air return opening 12b of the second storage bin 12 are also respectively provided with an air valve 18a and an air valve 18 b. Through the arrangement of the air valves, the exchange of air flows between the first storage bin 11 and the second storage bin 12 can be opened or closed at any time, for example, in the sampling process, all the air valves are opened, the low-temperature air in the first storage bin 11 and the normal-temperature air in the second storage bin 12 circulate, so that the temperature in the second storage bin 12 is reduced, and the temperature in the second storage bin 12 is kept to meet the technical requirement of sampling temperature; after sampling is completed, all gas valves are closed, the absorption bottles stored in the second storage bin 12 are moved into the first storage bin 11, the absorption bottles which are sampled are subjected to cold storage in the second storage bin 12, and the temperature in the second storage bin 12 is kept to meet the technical requirement of low-temperature storage temperature.
The invention also discloses a method for sampling and storing the atmospheric sample in the gaseous refrigeration scheme at low temperature, which comprises the following steps:
1. a sampling step:
1.1, placing an absorption bottle for sampling in the second storage bin, communicating the first storage bin with the second storage bin through the first air pipe and the second air pipe, starting the refrigeration mechanism, refrigerating the first storage bin by the refrigeration mechanism, circulating gas in the first storage bin and the second storage bin to refrigerate the second storage bin, and controlling the temperature of the second storage bin to be stabilized in a preset temperature range;
during sampling, the temperature in the second storage bin needs to be controlled to be 20 +/-4 ℃, and the absorption bottle is stored in the second storage bin for sampling.
1.2, starting the solution absorption method atmospheric sampling equipment to sample and finish sampling;
2. and (3) low-temperature storage:
2.1, controlling the temperature of the first storage bin to be stabilized in a preset temperature range when sampling approaches to the tail sound; the first storage bin is used for storing the absorption bottles at low temperature, and the temperature in the first storage bin needs to be controlled to be 0-4 ℃.
And 2.2, after sampling is finished, moving the absorption bottle into the first storage bin, and storing at a low temperature within a preset temperature range.
Therefore, when sampling is completed, the absorption bottle can be stored at low temperature in the first storage bin, and meanwhile, the four air valves are closed, and the first air conveying pipe and the second air conveying pipe are pulled out. Furthermore, the apparatus with the stored uptake vials continues to operate and is transported back to the laboratory for analysis.
The above description is only for the specific embodiments of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present invention, and all the changes or substitutions should be covered within the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (7)
1. The utility model provides a gaseous state refrigeration scheme absorption bottle sampling refrigeration and low temperature storage set composite, uses with solution absorption method atmosphere sampling equipment cooperation, its characterized in that includes:
the storage bin module is used for storing the absorption bottles;
the refrigeration mechanism comprises a compressor, a condenser and an evaporator, wherein the compressor compresses a gaseous refrigerant into a high-temperature high-pressure gaseous refrigerant, the high-temperature high-pressure gaseous refrigerant is condensed in the condenser to release heat and be liquefied into a low-temperature high-pressure liquid refrigerant, and the low-temperature high-pressure liquid refrigerant is evaporated, gasified and absorbs heat in the evaporator;
The evaporator and the storage bin module exchange heat by taking gaseous substances as media;
the storage bin module includes first storage bin, the evaporimeter is located in the first storage bin, first storage bin includes: the first bin door is arranged on the first bin body, the first bin door is matched with the first bin body to form a sealed heat-insulation space for the first storage bin, and the first bin body and the first bin door are both of heat-insulation material structures;
the storage bin module further comprises a second storage bin, the second storage bin is communicated with the first storage bin, an opening is formed in the upper end of the second storage bin, and when the absorption bottle is placed into the second storage bin from the opening, the absorption bottle can be placed in the second storage bin in a sealing mode;
the second storage bin is communicated with the first storage bin and comprises a first air conveying pipe and a second air conveying pipe, and the first air conveying pipe and the second air conveying pipe are used for circulating air in the first storage bin and the second storage bin so as to refrigerate the second storage bin;
the air conditioner comprises a first air pipe, a second air pipe, a central processing unit and a control module, wherein the first air pipe is provided with a first air pump for providing air conveying power, the second air pipe is provided with a second air pump for providing air return power, the first air pump and the second air pump are of the same type, the first storage bin is provided with a first temperature sensor, the second storage bin is provided with a second temperature sensor, the central processing unit is connected with the central processing unit, the central processing unit controls the power of the first air pump and the power of the second air pump according to the temperature information detected by the first temperature sensor and the second temperature sensor, and the central processing unit also controls the working power of the compressor;
The first storage bin is provided with a gas transmission port and a gas return port, and the gas transmission port and the gas return port of the first storage bin are respectively provided with a gas valve; the second storage bin is also provided with an air conveying port and an air return port, and the air conveying port and the air return port of the second storage bin are also respectively provided with an air valve.
2. The compound device of claim 1, wherein the gaseous substance is air.
3. The combination apparatus for sampling, cooling and cryogenic storage of claim 1 wherein both the first storage compartment and the second storage compartment are provided with a gas transfer port and a gas return port, the gas transfer port of the first storage compartment being connected to the gas return port of the second storage compartment by the first gas transfer line, the gas transfer port of the second storage compartment being connected to the gas return port of the first storage compartment by the second gas transfer line.
4. The combined sampling, refrigeration and cryogenic storage device according to claim 1, wherein the first air pipe is provided with a first air pump for supplying pneumatic power, the first storage bin is provided with a first temperature sensor, the second storage bin is provided with a second temperature sensor, the combined sampling, refrigeration and cryogenic storage device further comprises a central processing unit, the first temperature sensor, the second temperature sensor and the first air pump are all connected with the central processing unit, the central processing unit controls the power of the first air pump according to the temperature information detected by the first temperature sensor and the second temperature sensor, and the central processing unit controls the operating power of the compressor.
5. A composite apparatus for sampling, refrigerating and cryogenic storing of a gaseous refrigeration scheme absorption bottle as claimed in claim 1, wherein the air inlet of the first air pump is provided with a first flow sensor, the air inlet of the second air pump is provided with a second flow sensor, and the central processing unit adjusts the power of the first air pump and the second air pump according to the information of the air flow detected by the first flow sensor and the second flow sensor.
6. A combined sampling and refrigeration and cryogenic storage device according to claim 1 wherein a first and second barometric pressure sensor is located in each of said first and second storage compartments.
7. A method for sampling and storing by using the composite apparatus of gaseous refrigeration scheme absorption bottle sampling refrigeration and cryogenic storage of claim 1, comprising the steps of:
1. a sampling step:
1.1, placing an absorption bottle for sampling in the second storage bin, communicating the first storage bin with the second storage bin through the first air pipe and the second air pipe, starting the refrigeration mechanism, refrigerating the first storage bin by the refrigeration mechanism, circulating gas in the first storage bin and the second storage bin to refrigerate the second storage bin, and controlling the temperature of the second storage bin to be stabilized in a preset temperature range;
1.2, starting a solution absorption method atmosphere sampling device to sample and finish sampling;
2. and (3) low-temperature storage:
2.1, controlling the temperature of the first storage bin to be stabilized in a preset temperature range when sampling approaches to the tail sound;
and 2.2, after sampling is finished, moving the absorption bottle into the first storage bin, and storing at a low temperature within a preset temperature range.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN2530256Y (en) * | 2001-12-21 | 2003-01-08 | 董海桅 | Constant temp/current baromatric sampler |
| FR2927422A1 (en) * | 2008-02-08 | 2009-08-14 | R & I Alliance Soc Par Actions | DEVICE FOR SAMPLING A SAMPLE OF GAS, AND METHOD FOR RETURNING A SAMPLE DRAWN. |
| CN101846598A (en) * | 2010-05-18 | 2010-09-29 | 青岛恒远检测技术有限公司 | Time-sharing multiple-sample constant-temperature constant-current air sampler |
| CN103353409A (en) * | 2013-05-14 | 2013-10-16 | 深圳国技仪器有限公司 | Atmosphere sampling apparatus with temperature regulation function |
| CN207214592U (en) * | 2017-09-11 | 2018-04-10 | 合肥华凌股份有限公司 | Wind cooling refrigerator |
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2019
- 2019-11-26 CN CN201911169605.2A patent/CN111043806B/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2530256Y (en) * | 2001-12-21 | 2003-01-08 | 董海桅 | Constant temp/current baromatric sampler |
| FR2927422A1 (en) * | 2008-02-08 | 2009-08-14 | R & I Alliance Soc Par Actions | DEVICE FOR SAMPLING A SAMPLE OF GAS, AND METHOD FOR RETURNING A SAMPLE DRAWN. |
| CN101846598A (en) * | 2010-05-18 | 2010-09-29 | 青岛恒远检测技术有限公司 | Time-sharing multiple-sample constant-temperature constant-current air sampler |
| CN103353409A (en) * | 2013-05-14 | 2013-10-16 | 深圳国技仪器有限公司 | Atmosphere sampling apparatus with temperature regulation function |
| CN207214592U (en) * | 2017-09-11 | 2018-04-10 | 合肥华凌股份有限公司 | Wind cooling refrigerator |
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