CN106383075B - Condensation nucleus particle growth device - Google Patents
Condensation nucleus particle growth device Download PDFInfo
- Publication number
- CN106383075B CN106383075B CN201610963882.0A CN201610963882A CN106383075B CN 106383075 B CN106383075 B CN 106383075B CN 201610963882 A CN201610963882 A CN 201610963882A CN 106383075 B CN106383075 B CN 106383075B
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- cabin
- refrigerating
- saturation
- block
- particle growth
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N15/00—Investigating characteristics of particles; Investigating permeability, pore-volume, or surface-area of porous materials
- G01N15/06—Investigating concentration of particle suspensions
- G01N15/065—Investigating concentration of particle suspensions using condensation nuclei counters
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N15/00—Investigating characteristics of particles; Investigating permeability, pore-volume, or surface-area of porous materials
- G01N15/10—Investigating individual particles
- G01N15/14—Electro-optical investigation, e.g. flow cytometers
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N15/00—Investigating characteristics of particles; Investigating permeability, pore-volume, or surface-area of porous materials
- G01N15/10—Investigating individual particles
- G01N15/14—Electro-optical investigation, e.g. flow cytometers
- G01N2015/1486—Counting the particles
Abstract
The invention relates to a condensation nucleus particle growth device, which comprises a saturation cabin and a refrigeration cabin; the refrigerating cabin comprises a refrigerating outer cabin and a refrigerating inner cabin which is hermetically connected in the refrigerating outer cabin, and a gas channel is arranged in the refrigerating inner cabin; the inside of the saturation cabin is hollow, one end of the saturation cabin is fixedly connected with the refrigeration outer cabin, the other end of the saturation cabin is provided with an alcohol core in a pluggable manner, and a gas channel is arranged in the alcohol core; a semiconductor refrigerating block with a central through hole is tightly pressed between the saturation cabin and the refrigerating inner cabin, the cold end of the semiconductor refrigerating block is tightly attached to the refrigerating inner cabin through a first heat conducting fin, and the hot end of the semiconductor refrigerating block is tightly attached to the saturation cabin through a second heat conducting fin; the gas channel in the alcohol core is communicated with the gas channel in the refrigerating inner cabin through the semiconductor refrigerating block.
Description
Technical Field
The present invention relates to a particle growth apparatus, and more particularly, to a condensation nucleus particle growth apparatus.
Background
The most common of current aerosol measurement techniques in performing particle count measurements is a laser particle counter. However, the minimum particle size that can be measured by the laser particle counter is about 100nm, and in many special fields, it is required to count particles with a particle size smaller than 100nm, and in this case, the laser particle counter cannot meet the use requirement. The condensation nucleus counter overcomes the problem and the working principle is as follows: the particles are fully mixed with the alcohol vapor when passing through the alcohol vapor saturated at high temperature, and then the alcohol vapor becomes supersaturated at low temperature through a low-temperature condenser, so that small liquid drops are condensed, and the small liquid drops gradually grow into large-particle-size particles which can be detected by a laser particle counter by taking the fine particles as condensation nuclei. After the particles enter the photosensitive area, laser irradiated on the particles is scattered, the scattered light is collected and subjected to photoelectric conversion to obtain a pulse signal, and the number of the pulse signals is calculated to obtain the number of the particles.
However, the existing condensation nucleus particle growth device generally adopts an alcohol tank as an alcohol volatilization device, and is heated at the tank bottom, so that the structure is easy to cause non-uniformity of alcohol steam and particulate matters, meanwhile, a connecting pipeline between a condensation device and a detection device is too long, and the condition that large-particle-size particulate matters which are formed completely by using fine particulate matters as condensation nucleus growth strike the side wall of the pipeline to break easily occurs, so that the growth efficiency of the particulate matters is affected. In addition, due to the split design of heating, condensing and alcohol tanks, the particle growth device is large in size and power consumption. In order to solve the above problems, there is a need to develop a novel condensation nucleus particle growth device with high particle growth rate, small volume and low power consumption.
Disclosure of Invention
The invention aims to provide a condensation nucleus particle growth device with high particle growth rate, low power consumption and small volume.
In order to achieve the above purpose, the present invention adopts the following technical scheme: the utility model provides a congeal tuberculosis particle growth device which characterized in that: the device comprises a saturation cabin and a refrigerating cabin; the refrigerating cabin comprises a refrigerating outer cabin and a refrigerating inner cabin which is hermetically connected in the refrigerating outer cabin, and a gas channel is arranged in the refrigerating inner cabin; the inside of the saturation cabin is hollow, one end of the saturation cabin is fixedly connected with the refrigeration outer cabin, the other end of the saturation cabin is provided with an alcohol core in a pluggable manner, and a gas channel is arranged in the alcohol core; a semiconductor refrigerating block with a central through hole is tightly pressed between the saturation cabin and the refrigerating inner cabin, the cold end of the semiconductor refrigerating block is tightly attached to the refrigerating inner cabin through a first heat conducting fin, and the hot end of the semiconductor refrigerating block is tightly attached to the saturation cabin through a second heat conducting fin; the gas channel in the alcohol core is communicated with the gas channel in the refrigerating inner cabin through the semiconductor refrigerating block.
The alcohol core is in a ladder-shaped cylindrical structure and comprises an end part and a core part; the end of the alcohol core is fixedly connected with the free end of the saturation chamber, and the core is connected in the saturation chamber along the axial direction of the saturation chamber.
And an air passage connecting ring is arranged in the central through hole of the semiconductor refrigeration block, and an air passage in the air passage connecting ring is respectively communicated with an air passage in the alcohol core and an air passage in the refrigeration inner cabin.
The inner cabin is arranged in the cavity of the outer cabin, the cavity of the inner cabin is a gas channel, and an O-shaped ring and a sealing gasket are arranged between the inner cabin and the outer cabin.
The refrigerating outer cabin is provided with a groove at the connecting end of the saturated cabin, a boss structure is correspondingly arranged at one end of the saturated cabin facing the refrigerating outer cabin, and the semiconductor refrigerating block is arranged in a cavity formed by matching the groove with the boss structure.
The first heat conducting fin and the second heat conducting fin are made of aluminum oxide ceramic plates, and the areas of the first heat conducting fin and the second heat conducting fin are the same as the end surface areas of the semiconductor refrigeration blocks.
An O-shaped ring is arranged between the semiconductor refrigerating block and the saturation cabin, and an O-shaped ring is arranged between the semiconductor refrigerating block and the refrigerating inner cabin.
The alcohol core is made of polyethylene material, and the volatile liquid in the alcohol core is isopropanol.
The saturation cabin and the refrigerating inner cabin are made of aluminum alloy, and the heat preservation materials are wrapped outside the saturation cabin and the refrigerating outer cabin.
The refrigerating inner cabin is connected with an air pump, and the sampling flow of the air pump is 0.2-0.4L/min.
Due to the adoption of the technical scheme, the invention has the following advantages: 1. according to the invention, the alcohol core is arranged in the saturation cabin in a pluggable manner, so that the alcohol steam and the particulate matters can be fully mixed, and the growth efficiency of condensation nucleus particles is improved. 2. The invention uses the saturation cabin and the refrigeration cabin to share one semiconductor refrigeration block, and the semiconductor refrigeration block has small power consumption, so that the particle growth device with low power consumption, small volume and high growth rate can be provided. 3. The invention adopts the gas path connecting ring, the O-shaped ring and the sealing gasket to seal, thereby improving the tightness of the whole device.
Drawings
FIG. 1 is a schematic view of the overall structure of the present invention;
FIG. 2 is an exploded schematic view of the overall structure of the present invention;
FIG. 3 is a schematic structural view of the alcohol core of the present invention.
Detailed Description
The present invention will be described in detail with reference to the accompanying drawings and examples.
As shown in fig. 1 and 2, the present invention includes a saturation compartment 1 and a refrigeration compartment. The refrigerating cabin comprises a refrigerating outer cabin 2 and a refrigerating inner cabin 3 which is hermetically connected in the refrigerating outer cabin 2, and a gas channel is arranged in the refrigerating inner cabin 3. The inside of the saturation cabin 1 is hollow, one end of the saturation cabin 1 is fixedly connected with the refrigeration outer cabin 2, and the other end of the saturation cabin is provided with an alcohol core 4 in a pluggable manner. The alcohol core 4 is provided with a gas channel (as shown in fig. 3). A semiconductor refrigerating block 5 with a central through hole is tightly pressed between the saturation cabin 1 and the refrigerating inner cabin 3, the cold end of the semiconductor refrigerating block 5 is tightly attached to the refrigerating inner cabin 3 through a heat conducting sheet 6, and the hot end of the semiconductor refrigerating block 5 is tightly attached to the saturation cabin 1 through a heat conducting sheet 7. The gas channel in the alcohol core 4 is communicated with the gas channel in the refrigerating inner cabin 3 through the semiconductor refrigerating block 5.
In the above embodiment, the alcohol core 4 has a stepped cylindrical structure, including the end 14 and the core 15, the end 14 of the alcohol core 4 is fixedly connected with the free end of the saturation chamber 1, and the core 15 is connected in the saturation chamber 1 along the axial direction of the saturation chamber.
In the above embodiment, the air passage connection ring 8 is disposed in the central through hole of the semiconductor refrigeration block 5, and the air passage in the air passage connection ring 8 is respectively communicated with the air passage in the alcohol core 4 and the air passage in the refrigeration inner cabin 3. The arrangement of the gas path connecting ring 8 can better ensure the tightness of the gas channel.
In the above embodiment, the refrigerating outer cabin 2 and the refrigerating inner cabin 3 are both provided with the cavities, the refrigerating inner cabin 2 is disposed in the cavity of the refrigerating outer cabin 3, the cavity of the refrigerating inner cabin 3 is a gas channel, and the O-rings 9, 10 and the sealing gasket 11 are disposed between the refrigerating inner cabin 3 and the refrigerating outer cabin 2.
In the above embodiment, the connection end of the refrigeration outer cabin 2 and the saturation cabin 1 is provided with a groove, and correspondingly, the end of the saturation cabin 1 facing the refrigeration outer cabin 2 is provided with a boss structure, and the semiconductor refrigeration block 5 is arranged in a cavity formed by matching the groove and the boss structure.
In the above embodiment, the saturation chamber 1 and the refrigeration outer chamber 2 are fixedly connected through a flange.
In the above embodiment, the heat conductive sheet 6 and the heat conductive sheet 7 are both made of alumina ceramic sheet, and have the same area as the end surface area of the semiconductor refrigeration block 5, and have good heat transfer characteristics.
In the above embodiment, the O-ring 12 is provided between the semiconductor refrigeration block 5 and the saturation chamber 1, and the O-ring 13 is provided between the semiconductor refrigeration block 5 and the refrigeration inner chamber 2.
In the above embodiment, the alcohol core 4 is made of polyethylene material, and the volatile liquid in the alcohol core 4 is isopropanol.
In the above embodiment, the saturation chamber 1 and the refrigeration inner chamber 3 are made of aluminum alloy, and the exterior of the saturation chamber 1 and the refrigeration outer chamber 2 may be wrapped with a heat insulation material.
In the above embodiment, in order to realize the gas flow from the saturation chamber 1 to the refrigerating inner chamber 3, the refrigerating inner chamber 3 is connected with an air pump (not shown in the figure), and the sampling flow rate of the air pump is 0.2-0.4L/min, preferably 0.35L/min.
The working process of the invention is as follows: the air is pumped by the air pump, the air containing small particles enters the saturation chamber 1, alcohol is heated and evaporated in the alcohol core 4 in the saturation chamber 1 and is fully mixed with the small particles in the air, then the air enters the refrigerating inner chamber 3, the temperature in the refrigerating inner chamber 3 is reduced, the alcohol vapor is condensed into small liquid drops, and the small particles are attached to the air as condensation nuclei, so that the small particles grow into large particles. In the process, after the semiconductor refrigeration block 5 is powered on, electron-hole pairs are generated near the cold end of the semiconductor refrigeration block, so that the internal energy is reduced, the temperature is reduced, and heat is absorbed to the outside; the hot end is increased in internal energy due to electron-hole pair recombination, increased in temperature, and released to the environment. After being electrified, the semiconductor refrigeration block 5 transfers the heat of the cold end to the hot end to generate a certain temperature difference, and transfers the heat to the saturation chamber 1 and the refrigeration inner chamber 3 to control the temperature difference between the saturation chamber and the refrigeration inner chamber to be within 15 ℃, the temperature difference ensures the rapid growth of particles, and the particle growth rate reaches 75%. To achieve the desired effect, the power of the semiconductor refrigeration block 5 is set to 0.75a×5v.
The present invention has been described with reference to the above embodiments, and the structure, arrangement and connection of the components may be varied. On the basis of the technical scheme, the improvement or equivalent transformation of the individual components according to the principles of the invention should not be excluded from the protection scope of the invention.
Claims (8)
1. The utility model provides a congeal tuberculosis particle growth device which characterized in that: the device comprises a saturation cabin and a refrigerating cabin; the refrigerating cabin comprises a refrigerating outer cabin and a refrigerating inner cabin which is hermetically connected in the refrigerating outer cabin, and a gas channel is arranged in the refrigerating inner cabin; the inside of the saturation cabin is hollow, one end of the saturation cabin is fixedly connected with the refrigeration outer cabin, the other end of the saturation cabin is provided with an alcohol core in a pluggable manner, and a gas channel is arranged in the alcohol core; a semiconductor refrigerating block with a central through hole is tightly pressed between the saturation cabin and the refrigerating inner cabin, the cold end of the semiconductor refrigerating block is tightly attached to the refrigerating inner cabin through a first heat conducting fin, and the hot end of the semiconductor refrigerating block is tightly attached to the saturation cabin through a second heat conducting fin; the gas channel in the alcohol core is communicated with the gas channel in the refrigerating inner cabin through the semiconductor refrigerating block;
the alcohol core is in a ladder-shaped cylindrical structure and comprises an end part and a core part; the end part of the alcohol core is fixedly connected with the free end of the saturation cabin, and the core part is connected in the saturation cabin along the axial direction of the saturation cabin;
and an air passage connecting ring is arranged in the central through hole of the semiconductor refrigeration block, and an air passage in the air passage connecting ring is respectively communicated with an air passage in the alcohol core and an air passage in the refrigeration inner cabin.
2. A condensation nucleus particle growth apparatus as claimed in claim 1, wherein: the inner cabin is arranged in the cavity of the outer cabin, the cavity of the inner cabin is a gas channel, and an O-shaped ring and a sealing gasket are arranged between the inner cabin and the outer cabin.
3. A condensation nucleus particle growth apparatus as claimed in claim 1, wherein: the refrigerating outer cabin is provided with a groove at the connecting end of the saturated cabin, a boss structure is correspondingly arranged at one end of the saturated cabin facing the refrigerating outer cabin, and the semiconductor refrigerating block is arranged in a cavity formed by matching the groove with the boss structure.
4. A condensation nucleus particle growth apparatus as claimed in claim 1, wherein: the first heat conducting fin and the second heat conducting fin are made of aluminum oxide ceramic plates, and the areas of the first heat conducting fin and the second heat conducting fin are the same as the end surface areas of the semiconductor refrigeration blocks.
5. A condensation nucleus particle growth apparatus as claimed in claim 1, wherein: an O-shaped ring is arranged between the semiconductor refrigerating block and the saturation cabin, and an O-shaped ring is arranged between the semiconductor refrigerating block and the refrigerating inner cabin.
6. A condensation nucleus particle growth apparatus as claimed in claim 1, wherein: the alcohol core is made of polyethylene material, and the volatile liquid in the alcohol core is isopropanol.
7. A condensation nucleus particle growth apparatus as claimed in claim 1, wherein: the saturation cabin and the refrigerating inner cabin are made of aluminum alloy, and the heat preservation materials are wrapped outside the saturation cabin and the refrigerating outer cabin.
8. A condensation nucleus particle growth apparatus as claimed in claim 1, wherein: the refrigerating inner cabin is connected with an air pump, and the sampling flow of the air pump is 0.2-0.4L/min.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610963882.0A CN106383075B (en) | 2016-11-04 | 2016-11-04 | Condensation nucleus particle growth device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610963882.0A CN106383075B (en) | 2016-11-04 | 2016-11-04 | Condensation nucleus particle growth device |
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| Publication Number | Publication Date |
|---|---|
| CN106383075A CN106383075A (en) | 2017-02-08 |
| CN106383075B true CN106383075B (en) | 2023-08-15 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201610963882.0A Active CN106383075B (en) | 2016-11-04 | 2016-11-04 | Condensation nucleus particle growth device |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108535168B (en) * | 2018-03-12 | 2023-11-28 | 清华大学 | Small particle condensation growth counter |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101725166A (en) * | 2009-11-05 | 2010-06-09 | 张逸林 | Liquefying method for compression cloud chamber |
| JP2014002035A (en) * | 2012-06-18 | 2014-01-09 | National Institute Of Advanced Industrial & Technology | Partial suction type condensed particle counter |
| CN105013609A (en) * | 2015-07-21 | 2015-11-04 | 李森 | Ultrasonic atomization and water molecule phase change active capture electrostatic precipitating method and device |
| DE102015108312A1 (en) * | 2014-05-27 | 2015-12-03 | Avl List Gmbh | Condensation particle counter and method of controlling the condensation particle counter |
| JP2016003879A (en) * | 2014-06-13 | 2016-01-12 | 東京エレクトロン株式会社 | Condensation nucleus counter and condensation nucleus growing method |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100865712B1 (en) * | 2006-07-12 | 2008-10-28 | 안강호 | System and method for measuring particles |
| KR100888954B1 (en) * | 2007-02-02 | 2009-03-17 | 안강호 | Condensation particle counter |
-
2016
- 2016-11-04 CN CN201610963882.0A patent/CN106383075B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101725166A (en) * | 2009-11-05 | 2010-06-09 | 张逸林 | Liquefying method for compression cloud chamber |
| JP2014002035A (en) * | 2012-06-18 | 2014-01-09 | National Institute Of Advanced Industrial & Technology | Partial suction type condensed particle counter |
| DE102015108312A1 (en) * | 2014-05-27 | 2015-12-03 | Avl List Gmbh | Condensation particle counter and method of controlling the condensation particle counter |
| JP2016003879A (en) * | 2014-06-13 | 2016-01-12 | 東京エレクトロン株式会社 | Condensation nucleus counter and condensation nucleus growing method |
| CN105013609A (en) * | 2015-07-21 | 2015-11-04 | 李森 | Ultrasonic atomization and water molecule phase change active capture electrostatic precipitating method and device |
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| CN106383075A (en) | 2017-02-08 |
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Address after: 100071 No. 20 East Main Street, Beijing, Fengtai District Applicant after: Institute of Microbiology and Epidemiology, Academy of Military Medical Sciences, PR China Applicant after: Qingdao Zhongrui Intelligent Instrument Co.,Ltd. Address before: 100071 No. 20 East Main Street, Beijing, Fengtai District Applicant before: Institute of Microbiology and Epidemiology, Academy of Military Medical Sciences, PR China Applicant before: QINGDAO ZHONGRUI INTELLIGENT INSTRUMENT Co.,Ltd. |
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