CN115161172A - Air sampler - Google Patents
Air sampler Download PDFInfo
- Publication number
- CN115161172A CN115161172A CN202211081042.3A CN202211081042A CN115161172A CN 115161172 A CN115161172 A CN 115161172A CN 202211081042 A CN202211081042 A CN 202211081042A CN 115161172 A CN115161172 A CN 115161172A
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- Prior art keywords
- channel
- air
- sampling
- cavity
- inlet
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Links
- 238000005070 sampling Methods 0.000 claims abstract description 116
- 239000007788 liquid Substances 0.000 claims abstract description 33
- 238000000605 extraction Methods 0.000 claims abstract description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 6
- 238000009434 installation Methods 0.000 claims description 3
- 244000005700 microbiome Species 0.000 abstract description 20
- 238000000034 method Methods 0.000 description 9
- 230000000694 effects Effects 0.000 description 4
- 244000000010 microbial pathogen Species 0.000 description 3
- 239000002245 particle Substances 0.000 description 3
- 238000001179 sorption measurement Methods 0.000 description 3
- 241001465754 Metazoa Species 0.000 description 2
- 238000001514 detection method Methods 0.000 description 2
- 230000000813 microbial effect Effects 0.000 description 2
- 208000035473 Communicable disease Diseases 0.000 description 1
- 239000000443 aerosol Substances 0.000 description 1
- 238000011109 contamination Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 201000010099 disease Diseases 0.000 description 1
- 208000037265 diseases, disorders, signs and symptoms Diseases 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 239000008187 granular material Substances 0.000 description 1
- 244000144972 livestock Species 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 239000002689 soil Substances 0.000 description 1
Images
Classifications
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- C—CHEMISTRY; METALLURGY
- C12—BIOCHEMISTRY; BEER; SPIRITS; WINE; VINEGAR; MICROBIOLOGY; ENZYMOLOGY; MUTATION OR GENETIC ENGINEERING
- C12M—APPARATUS FOR ENZYMOLOGY OR MICROBIOLOGY; APPARATUS FOR CULTURING MICROORGANISMS FOR PRODUCING BIOMASS, FOR GROWING CELLS OR FOR OBTAINING FERMENTATION OR METABOLIC PRODUCTS, i.e. BIOREACTORS OR FERMENTERS
- C12M29/00—Means for introduction, extraction or recirculation of materials, e.g. pumps
- C12M29/06—Nozzles; Sprayers; Spargers; Diffusers
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- C—CHEMISTRY; METALLURGY
- C12—BIOCHEMISTRY; BEER; SPIRITS; WINE; VINEGAR; MICROBIOLOGY; ENZYMOLOGY; MUTATION OR GENETIC ENGINEERING
- C12M—APPARATUS FOR ENZYMOLOGY OR MICROBIOLOGY; APPARATUS FOR CULTURING MICROORGANISMS FOR PRODUCING BIOMASS, FOR GROWING CELLS OR FOR OBTAINING FERMENTATION OR METABOLIC PRODUCTS, i.e. BIOREACTORS OR FERMENTERS
- C12M33/00—Means for introduction, transport, positioning, extraction, harvesting, peeling or sampling of biological material in or from the apparatus
Abstract
The invention provides an air sampler, which comprises an air inlet channel, an air outlet channel, a return channel and a sampling cavity, wherein the air inlet channel is communicated with the air outlet channel; the gas inlet channel and the gas outlet channel are both communicated with the sampling cavity, the sampling cavity is used for containing sampling liquid, and one end of the gas outlet channel, which is far away from the sampling cavity, is used for being connected with the gas extraction device or one end of the gas inlet channel, which is far away from the sampling cavity, is used for being connected with the gas inlet device; the inlet channel passes through air inlet and sampling chamber intercommunication, and the cross sectional area of air inlet is less than inlet channel's cross sectional area, and return channel's one end and outlet channel's lower part intercommunication, return channel's the other end extend to one side under the air inlet and with sampling chamber intercommunication. The air sampler provided by the invention can prevent the sampling liquid from being discharged along with the air outlet of the air outlet channel, and can greatly reduce the loss of the sampling liquid and the air sample when the target microorganism concentration in the air is low and long-time sampling is needed, so that the sampling result is more accurate and reliable.
Description
Technical Field
The invention relates to the technical field of microorganism sampling, in particular to an air sampler.
Background
Microorganisms in human, animal and plant bodies and soil can be dispersed in the air by droplets, dust, and the like, so that the air contains a certain variety and number of microorganisms. There are generally no pathogenic microorganisms in the air theoretically, but aerosols of pathogenic microorganisms are often suspended in the air near hospitals, veterinary hospitals and livestock houses, and healthy people or animals are often infected by inhalation. Air contaminated by pathogenic microorganisms can often be a source or vehicle of contamination, causing epidemic disease. Therefore, the detection of airborne microorganisms is of great significance for the prevention and control of infectious diseases and the hygiene supervision and protection of the environment.
The air sampler is an important tool in the air microorganism detection process, and has a variety of types, wherein the impact air sampler collects microorganism particles in air in a sampling liquid in a jet air flow mode. In the sampling process, after the sampling liquid is added into the sampler, air suction power is started, air enters from an air inlet of the sampler, microbial particles in the air impact the sampling liquid of the sampler, and the microbial particles are captured due to the adhesion of the liquid.
The working principle of the Venturi tube is to reduce the air flow from thick to thin so as to accelerate the air flow velocity and enable the air to form a vacuum area at the rear side of the outlet of the Venturi tube. When the vacuum area is close to the workpiece, a certain adsorption effect is generated on the workpiece and air flow is caused.
The common impact type air sampler has larger limit on the air flow speed when in use, and when the air flow speed is larger, the sampling liquid in the sampler is easy to splash upwards under the impact of high-speed air flow and is discharged through the air outlet, so that the loss of the sampling liquid and the air sample is caused, and the high-speed and long-time sampling of air microorganisms is not facilitated.
Disclosure of Invention
The invention aims to provide an air sampler, which solves the problems in the prior art, enables the sampling liquid splashed in the sampling process to flow back to a sampling cavity, avoids the sampling liquid from being discharged along with an air outlet of an air outlet channel, and can greatly reduce the loss of the sampling liquid and an air sample when the concentration of target microorganisms in the air is low and long-time sampling is needed, so that the sampling result is more accurate and reliable; meanwhile, in the sampling process, the air flow rate is increased, so that the air microorganism sampling rate is improved, the limitation of the sampler on the air flow rate is reduced, and a structural basis is further provided for improving the air microorganism sampling rate.
In order to achieve the purpose, the invention provides the following scheme:
the invention provides an air sampler, which comprises an air inlet channel, an air outlet channel, a backflow channel and a sampling cavity, wherein the air inlet channel is communicated with the air outlet channel; the gas inlet channel and the gas outlet channel are both communicated with the sampling cavity, the sampling cavity is used for containing sampling liquid, and one end of the gas outlet channel, which is far away from the sampling cavity, is used for being connected with a gas extraction device or one end of the gas inlet channel, which is far away from the sampling cavity, is used for being connected with a gas inlet device;
the inlet channel pass through the air inlet with the sampling chamber intercommunication, the cross sectional area of air inlet is less than inlet channel's cross sectional area, return flow channel's one end with the lower part intercommunication of outlet channel, return flow channel's the other end extend to one side under the air inlet and with the sampling chamber intercommunication.
Preferably, a portion of the return channel located in the outlet channel is provided with a plurality of side return holes.
Preferably, including sample thief body and holding piece, inlet channel the outlet channel with return channel all sets up in the sample thief body, the sampling chamber set up in the holding piece, holding piece demountable installation in on the sample thief body.
Preferably, the containing part is provided with an external thread, an internal thread is arranged in the sampler body, and the containing part is in threaded connection with the sampler body.
Preferably, the air outlet channel comprises an upper channel and a buffer cavity which are communicated, the upper channel is located above the buffer cavity, the buffer cavity is communicated with the sampling cavity, one end of the backflow channel extends into the buffer cavity, and the cross-sectional area of the buffer cavity is larger than that of the upper channel.
Preferably, inlet channel with the upper channel is parallel, the sampling chamber the air inlet with inlet channel is coaxial, the fixed water conservancy diversion face that is provided with in below of cushion chamber, the one end of water conservancy diversion face to the sampling chamber extends, and the other end is connected the cushion chamber is kept away from on the lateral wall in sampling chamber, the water conservancy diversion face along the cushion chamber extremely the direction downward sloping in sampling chamber.
Preferably, the lower end of the air inlet passage is a conical cavity, and the small end opening of the conical cavity forms the air inlet.
Compared with the prior art, the invention has the following technical effects:
when the air sampler provided by the invention is used for sampling air, the air inlet device can be connected with the air inlet channel or the air exhaust device is connected with the air outlet channel, the air is discharged to the sampling cavity from the air inlet after passing through the air inlet channel, according to the working principle of a Venturi tube, the airflow rapidly flowing at the air inlet enables the vicinity of the opening end of the backflow channel at one side just issued by the air inlet to be in a negative pressure state, and the backflow channel can adsorb the sampling liquid close to the other opening end, so that the sampling liquid splashed into the air outlet channel is recycled, the sampling liquid is prevented from being discharged from the air outlet channel along with the airflow, when the concentration of target microorganisms in the air is low and long-time sampling is needed, the loss of the sampling liquid and the air sample can be greatly reduced, and the sampling result is more accurate and reliable; meanwhile, in the sampling process, the air flow rate is increased, so that the air microorganism sampling rate is improved, the limitation of the sampler on the air flow rate is reduced, and a structural basis is further provided for improving the air microorganism sampling rate.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.
FIG. 1 is a schematic structural diagram of an air sampler provided by the present invention;
FIG. 2 is a front view of FIG. 1;
FIG. 3 is a top view of FIG. 1;
FIG. 4 is a sectional view taken along line B-B of FIG. 3;
in the figure: 1. a sampler body; 2. a receiving member; 11. an air intake passage; 12. an air outlet channel; 14. a return channel; 111. an air inlet; 121. an upper channel; 122. a buffer chamber; 141. a side return hole; 21. a sampling cavity.
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 only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be obtained by a person skilled in the art without making any creative effort based on the embodiments in the present invention, belong to the protection scope of the present invention.
The invention aims to provide an air sampler, which solves the problems in the prior art, enables the sampling liquid splashed in the sampling process to flow back to a sampling cavity, avoids the sampling liquid to be discharged along with an air outlet of an air outlet channel, and can greatly reduce the loss of the sampling liquid and an air sample when the target microorganism concentration in the air is low and long-time sampling is needed, so that the sampling result is more accurate and reliable; meanwhile, in the sampling process, the air flow rate is increased, so that the air microorganism sampling rate is improved, the limitation of the sampler on the air flow rate is reduced, and a structural basis is further provided for improving the air microorganism sampling rate.
In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in further detail below.
The invention provides an air sampler, which comprises an air inlet channel 11, an air outlet channel 12, a return channel 14 and a sampling cavity 21, as shown in figures 1 to 4; the air inlet channel 11 and the air outlet channel 12 are both communicated with the sampling cavity 21, the sampling cavity 21 is used for containing sampling liquid, one end of the air outlet channel 12, which is far away from the sampling cavity 21, is used for being connected with an air suction device, or one end of the air inlet channel 11, which is far away from the sampling cavity 21, is used for being connected with an air inlet device, and the air inlet device or the air suction device is used as a power source for air flow;
the air inlet channel 11 is communicated with the sampling cavity 21 through the air inlet 111, the cross-sectional area of the air inlet 111 is smaller than that of the air inlet channel 11, one end of the backflow channel 14 is communicated with the lower portion of the air outlet channel 12, and the other end of the backflow channel 14 extends to one side right below the air inlet 111 and is communicated with the sampling cavity 21.
When the air sampler provided by the invention is used for sampling air, an air inlet device can be connected with an air inlet channel 11 or an air exhaust device can be connected with an air outlet channel 12, the air is discharged to a sampling cavity 21 from an air inlet 111 after passing through the air inlet channel 11, according to the working principle of a Venturi tube, the airflow rapidly flowing at the air inlet 111 enables the vicinity of the opening end of a backflow channel 14 at one side of the air inlet 111 which is issued to be in a negative pressure state, so that the backflow channel 14 generates an adsorption effect on the sampling liquid close to the other opening end, the sampling liquid splashed into the air outlet channel 12 is recycled, the sampling liquid is prevented from being discharged from the air outlet channel 12 along with the airflow, when the concentration of target microorganisms in the air is low and long-time sampling is needed, the losses of the sampling liquid and the air sample can be greatly reduced, and the sampling result is more accurate and reliable; meanwhile, in the sampling process, the air flow rate is increased, so that the air microorganism sampling rate is improved, the limitation of the sampler on the air flow rate is reduced, and a structural basis is further provided for improving the air microorganism sampling rate.
Furthermore, the part of the return channel 14 located in the outlet channel 12 is provided with a plurality of side return holes 141, the return channel 14 generates an adsorption effect on the sampling liquid close to the side return holes 141, so that the sampling liquid is discharged to the sampling cavity 21 through the return channel 14, and the return channel 14 is formed in a return pipe.
Further, air sampler includes sample thief body 1 and holds 2, and inlet channel 11, air outlet channel 12 and backflow channel 14 are all seted up in sample thief body 1, and sampling cavity 21 is seted up in holding 2, holds 2 demountable installation on sample thief body 1 to in to sampling cavity 21 add the sample liquid or will hold the sample of gathering in 2 and take out.
Further, holding 2 and being provided with the external screw thread, being provided with the internal thread in sample thief body 1, holding 2 threaded connection is in sample thief body 1, and holding 2 is the one end opening, the other end confined sleeve column structure.
Further, air outlet channel 12 is including last passageway 121 and the buffer chamber 122 that are linked together, goes up passageway 121 and is located the top of buffer chamber 122, buffer chamber 122 and sampling chamber 21 intercommunication, in backflow channel 14's one end extended to buffer chamber 122, buffer chamber 122's cross-sectional area was greater than the cross-sectional area of last passageway 121, and the space in buffer chamber 122 is great, can hold the sampling liquid granule that more splashes, and then backflow channel 14 of being convenient for take up more sampling liquid.
Further, the air inlet channel 11 is parallel to the upper channel 121, and the sampling cavity 21, the air inlet 111 and the air inlet channel 11 are coaxial, so that air can impact the sampling liquid in the sampling cavity 21 better; a flow guide surface is fixedly arranged below the buffer cavity 122, one end of the flow guide surface extends towards the sampling cavity 21, the other end of the flow guide surface is connected to the side wall of the buffer cavity 122 far away from the sampling cavity 21, the flow guide surface inclines downwards along the direction from the buffer cavity 122 to the sampling cavity 21, and sampling liquid which is not absorbed by the backflow channel 14 falls onto the flow guide surface and flows into the sampling cavity 21 along with the flow guide surface.
Furthermore, the lower end of the air inlet channel 11 is a conical cavity, the small end of the conical cavity is opened to form an air inlet 111, and the inclined inner wall of the conical cavity is used for guiding air, so that the air flow power loss is reduced.
The principle and the implementation mode of the invention are explained by applying a specific example, and the description of the embodiment is only used for helping to understand the method and the core idea of the invention; meanwhile, for a person skilled in the art, according to the idea of the present invention, the specific embodiments and the application range may be changed. In view of the above, the present disclosure should not be construed as limiting the invention.
Claims (7)
1. An air sampler, characterized by: the sampling device comprises an air inlet channel, an air outlet channel, a backflow channel and a sampling cavity; the gas inlet channel and the gas outlet channel are both communicated with the sampling cavity, the sampling cavity is used for containing sampling liquid, and one end of the gas outlet channel, which is far away from the sampling cavity, is used for being connected with a gas extraction device or one end of the gas inlet channel, which is far away from the sampling cavity, is used for being connected with a gas inlet device;
the inlet channel pass through the air inlet with the sampling chamber intercommunication, the cross sectional area of air inlet is less than inlet channel's cross sectional area, return flow channel's one end with the lower part intercommunication of outlet channel, return flow channel's the other end extend to one side under the air inlet and with the sampling chamber intercommunication.
2. The air sampler of claim 1, wherein: the part of the return channel, which is positioned in the air outlet channel, is provided with a plurality of side return holes.
3. The air sampler of claim 1, wherein: including the sample thief body and holding the piece, inlet channel the outlet channel with return channel all sets up in the sample thief body, the sampling chamber set up in hold in the piece, hold a demountable installation in on the sample thief body.
4. The air sampler of claim 3, wherein: the containing part is provided with an external thread, an internal thread is arranged in the sampler body, and the containing part is in threaded connection with the sampler body.
5. The air sampler of claim 1, wherein: the air outlet channel comprises an upper channel and a buffer cavity which are communicated, the upper channel is located above the buffer cavity, the buffer cavity is communicated with the sampling cavity, one end of the backflow channel extends into the buffer cavity, and the cross sectional area of the buffer cavity is larger than that of the upper channel.
6. The air sampler of claim 5, wherein: the inlet channel with the upper channel is parallel, the sampling chamber the air inlet with the inlet channel is coaxial, the fixed water conservancy diversion face that is provided with in below of cushion chamber, the one end of water conservancy diversion face to the sampling chamber extends, and the other end is connected the cushion chamber is kept away from on the lateral wall in sampling chamber, the water conservancy diversion face along the cushion chamber extremely the direction downward sloping in sampling chamber.
7. The air sampler of claim 1, wherein: the lower end of the air inlet channel is a conical cavity, and the small end opening of the conical cavity forms the air inlet.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211081042.3A CN115161172A (en) | 2022-09-06 | 2022-09-06 | Air sampler |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211081042.3A CN115161172A (en) | 2022-09-06 | 2022-09-06 | Air sampler |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN115161172A true CN115161172A (en) | 2022-10-11 |
Family
ID=83480642
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202211081042.3A Pending CN115161172A (en) | 2022-09-06 | 2022-09-06 | Air sampler |
Country Status (1)
| Country | Link |
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| CN (1) | CN115161172A (en) |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1315655A (en) * | 2000-03-31 | 2001-10-03 | 深圳市中兴新通讯设备有限公司 | Sampler for fume dilution |
| JP2009011265A (en) * | 2007-07-06 | 2009-01-22 | Kansai Seiki Kogyo Kk | Air-suspended bacteria sampler |
| CN211659734U (en) * | 2019-12-19 | 2020-10-13 | 湖北大学 | Multifunctional gas mixing system |
| CN113199776A (en) * | 2021-03-15 | 2021-08-03 | 厦门理工学院 | Nanoparticle aerosol jet printing method and device |
| CN215328084U (en) * | 2021-11-25 | 2021-12-28 | 至美时代生物智能科技(北京)有限公司 | Air microorganism sampling bottle and air microorganism sampling device |
| CN114259841A (en) * | 2022-01-13 | 2022-04-01 | 大连理工大学洛阳研究院 | VOC-containing waste gas treatment system |
| CN114540177A (en) * | 2022-04-25 | 2022-05-27 | 至美时代生物智能科技(北京)有限公司 | Impact type air sampler |
-
2022
- 2022-09-06 CN CN202211081042.3A patent/CN115161172A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1315655A (en) * | 2000-03-31 | 2001-10-03 | 深圳市中兴新通讯设备有限公司 | Sampler for fume dilution |
| JP2009011265A (en) * | 2007-07-06 | 2009-01-22 | Kansai Seiki Kogyo Kk | Air-suspended bacteria sampler |
| CN211659734U (en) * | 2019-12-19 | 2020-10-13 | 湖北大学 | Multifunctional gas mixing system |
| CN113199776A (en) * | 2021-03-15 | 2021-08-03 | 厦门理工学院 | Nanoparticle aerosol jet printing method and device |
| CN215328084U (en) * | 2021-11-25 | 2021-12-28 | 至美时代生物智能科技(北京)有限公司 | Air microorganism sampling bottle and air microorganism sampling device |
| CN114259841A (en) * | 2022-01-13 | 2022-04-01 | 大连理工大学洛阳研究院 | VOC-containing waste gas treatment system |
| CN114540177A (en) * | 2022-04-25 | 2022-05-27 | 至美时代生物智能科技(北京)有限公司 | Impact type air sampler |
Non-Patent Citations (2)
| Title |
|---|
| 李建华: "《环境科学与工程技术词典 下卷》", 31 October 2005, 中国环境出版社 * |
| 隋鲁智 等, 北京工业大学出版社 * |
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Application publication date: 20221011 |
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